Patent Description:
The vehicle is a frequently used and indispensable tool in gardening operations. It is mainly used for short-distance transportation of goods. The existing vehicles are mainly moved artificially. When there are a large amount of goods or the vehicle needs to go uphill, due to the limited artificial thrust, the vehicle cannot be moved when the load is too large, or it will cause rollover. Therefore, traditional vehicles are inconvenient, laborious, and unsafe when used.

Although a variety of electric vehicles appear on the market to solve the above problems, most electric vehicles usually use batteries as a power supply device and the batteries are installed at the bottom of the hopper of the vehicle. Therefore, the vehicle needs to be lifted up when charging or when the battery needs to be replaced, which is inconvenient. Moreover, the structure of the existing electric vehicle is unreasonable, it is inconvenient to push and the effect is not good.

<CIT> discloses an electric push cart including a motor and a drive wheel that is rotationally driven by the motor. A cart frame that rotatably supports the drive wheel includes left and right handles for a user to hold. A controller drives the motor and issues a warning. The controller issues a warning when a motor-stop condition is fulfilled as a result of an increase in load on the motor when driving the motor and stops the drive of the motor after a given time has elapsed.

<CIT> discloses a push servo-assisted cart comprises a support frame, defining a loading space, a pair of driving wheels and operated by motors, and at least one pivoting wheel, arranged to cooperate with the pair of driving wheels. Furthermore, a handlebar is provided for moving the cart. The motors are supplied by a battery and means is provided for controlling the motors configured for selectively and independently activating the motors for each driving wheel. The control means comprises respective end portions with respective engagement portions associated with the handlebar. Furthermore, a first and a second control block are provided integral to the support frame.

<CIT> discloses a hand electric light type carrying trolley based on hub motors and a controller and relates to short-distance carrying trolleys. The hand electric light type carrying trolley based on the hub motors and the controller comprises a trolley frame (<NUM>), the hub motors (<NUM>), the controller (<NUM>), a battery bin (<NUM>) and universal wheels (<NUM>). The hub motors (<NUM>) and the universal wheels (<NUM>) are arranged at the front portion and the rear portion of the bottom of the trolley frame (<NUM>); the controller (<NUM>) and the battery bin (<NUM>) are arranged on the trolley frame (<NUM>); and the hub motors (<NUM>) and the battery bin (<NUM>) are connected with the controller (<NUM>). Compared with the prior art, the output torque is amplified; an outer transmission structure is greatly simplified through the hub motors; the trolley is light and convenient to use, space is saved, and the weight of the trolley is further reduced; operation and control are easy; and the trolley is suitable for short-distance carrying of the industries such as expressage, storage, supermarkets, hospitals and hotels.

An objective of the invention is to provide an electric vehicle with a control assembly which increase the ease of use and safety of the electric vehicle.

The following describes the implementation of the invention through the specific embodiments. Those skilled in the art can easily understand the other advantages and effects of the invention from the content disclosed in this specification. The invention can also be implemented or applied through other different specific embodiments. The details in this specification can also be based on different viewpoints and applications, and various modifications or changes can be made without departing from the invention as defined by the appended claims.

It should be noted that the drawings provided in the embodiments only illustrate the basic idea of the invention in a schematic manner. The figures only show the assemblies related to the invention instead of the number, shape, and drawing size of the assemblies in actual implementation. In the actual implementation, the type, quantity and proportion of each assembly can be changed at will, and the layout type of the assemblies may also be more complicated.

As shown in <FIG>, the invention provides an electric vehicle <NUM>, which includes a main body <NUM>, a drive assembly <NUM> installed on the main body <NUM> and driving the main body <NUM> to move, an armrest frame <NUM> installed on the main body <NUM>, a power supply assembly <NUM> installed on the armrest frame <NUM> and supplying power to the drive assembly <NUM>, and a control assembly <NUM> installed on the armrest frame <NUM> and controlling the electric vehicle <NUM>.

As shown in <FIG> and <FIG>, the main body <NUM> includes a carrying part <NUM> horizontally arranged, and the carrying part <NUM> is used to carry goods. The main body <NUM> can be used as a frame. In some embodiments, a body can also be provided on the main body <NUM>, for example, a vehicle body or a carriage may be provided on the main body <NUM>. In this embodiment, the upper surface of the carrying part <NUM> is flat, but in other embodiments, the shape of the upper surface of the carrying part <NUM> can also be set as required. The drive assembly <NUM> is installed below the carrying part <NUM>. In this embodiment, the drive assembly <NUM> may include a hub motor <NUM> installed at the bottom of the main body <NUM>, and wheels <NUM> are installed on the hub motor <NUM>. The electric vehicle <NUM> also includes universal wheels <NUM> installed under the carrying part <NUM>. In this embodiment, the universal wheels <NUM> are located on a side of the main body <NUM> close to the armrest frame <NUM>, and the drive assembly <NUM> is located on a side of the main body <NUM> away from the armrest frame <NUM>. However, in other embodiments, the drive assembly <NUM> can also be arranged on the side of the main body <NUM> close to the armrest <NUM>, and the universal wheels <NUM> can also be located on the side of the main body <NUM> away from the armrest <NUM>.

As shown in <FIG> and <FIG>, the armrest frame <NUM> is installed on the main body <NUM> and is perpendicular to the carrying part <NUM>. However, in other embodiments, the angle between the armrest frame <NUM> and the carrying part <NUM> can be set as required, which is not limited in the disclosure. The armrest frame <NUM> includes a frame body <NUM> and a bar <NUM> installed on the frame body <NUM>. The frame body <NUM> includes a cross-bar part <NUM> and a pair of arm parts <NUM> formed by bending and extending outward from two ends of the cross-bar part <NUM> respectively. The cross-bar part <NUM> is roughly V-shaped, and the pair of arm parts <NUM> is arranged parallel to each other. The bar <NUM> is installed between the pair of arm parts <NUM> and is roughly perpendicular to the arm parts <NUM>. The end of the arm parts <NUM> away from the cross-bar part <NUM> is installed on the main body <NUM>. The arm parts <NUM> is provided with at least two mounting holes <NUM> extending through the arm parts <NUM> along the vertical direction. In this embodiment, the arm parts <NUM> are fixedly installed on the main body <NUM>. However, in other embodiments, the arm parts <NUM> can also be pivotally installed on the main body <NUM>, so that the angle between the arm parts <NUM> and the carrying part <NUM> can be adjusted as required to meet different requirements. The bar <NUM> is located between the pair of arm parts <NUM>, and its two ends are respectively fixed on the pair of arm parts <NUM> to enhance the rigidity of the pair of arm parts <NUM> in the horizontal direction. The bar <NUM> may also be configured to support a battery pack base <NUM> or a power supply assembly <NUM> to share the force between the battery pack base <NUM> and the arm parts <NUM>. In this embodiment, there are two bars <NUM>, but in other embodiments, the number of the bars <NUM> can be set as required, which is not limited in the disclosure. In this embodiment, the armrest frame <NUM> is roughly U-shaped, but in other embodiments, the shape of the armrest frame <NUM> can also be set as required.

As shown in <FIG>, the power supply assembly <NUM> includes a battery pack base <NUM> installed on the armrest frame <NUM>, at least one battery pack <NUM> replaceably housed in the battery pack base <NUM>, and a control panel <NUM> housed in the battery pack base <NUM>. The battery pack base <NUM> is detachably installed on the armrest frame <NUM>, which means that the power supply assembly <NUM> is detachably installed on the armrest frame <NUM>. In this embodiment, there are two battery packs <NUM>. Of course, it can be understood that the number of the battery packs <NUM> can be set as required. The two or more battery packs <NUM> are arranged at horizontal intervals. The two or more battery packs <NUM> can be designed to be connected in parallel and then electrically connected to the drive assembly <NUM>, so that the input current can be increased through powering by the two or more battery packs <NUM> connected in parallel, and more power can be gotten under a same voltage. The two or more battery packs <NUM> may also be designed to be connected in series and electrically connected to the drive assembly <NUM>, so that the input voltage can be increased through powering by the two or more battery packs <NUM> connected in series, and obtain more power to adapt to battery packs of different voltages. Of course, the two or more battery packs <NUM> can also be designed to supply power to the drive assembly <NUM> individually and they are switchable, so that the two or more battery packs <NUM> can be automatically switched to cyclically provide power to the drive assembly <NUM>. At this time, the electric vehicle <NUM> may also be provided with an indicator element (not shown) that indicates the power of the battery pack <NUM> to remind the user of the power of the battery pack. When the power of a certain battery pack is exhausted, the user can take out the battery pack and charge it. With this arrangement, the electric vehicle <NUM> can work uninterruptedly.

As shown in <FIG> and <FIG>, the battery pack base <NUM> includes receiving cavities <NUM> for receiving the battery pack <NUM> and covers <NUM> that cooperates with the receiving cavities <NUM> to cover the corresponding battery pack <NUM>. The two covers <NUM> can be opened to each other to expose the corresponding receiving cavities <NUM>. The covers <NUM> and the corresponding receiving cavities <NUM> completely wrap the battery pack <NUM> to protect it from failure and short circuit when exposed to rain, thereby improving the safety and reliability of the battery pack <NUM>. The battery pack <NUM> can be inserted into the corresponding receiving cavities <NUM> when working. The battery pack base <NUM> is also provided with a release button (not shown) and an elastic element (not shown) located in the receiving cavity <NUM>. When the battery pack <NUM> is placed in the receiving cavity <NUM>, and the release button is pressed, the battery pack <NUM> will be locked in the receiving cavity <NUM> through the buckle on the release button and the elastic element will be elastically deformed. When the battery pack <NUM> needs to be taken out, the release button can be pressed again to prevent the buckle from locking the battery pack <NUM>. At this time, the elastic element will reset and push a part of the battery pack <NUM> up from the receiving cavity <NUM> so that the user can take out the battery pack <NUM> easily. The battery pack <NUM> can also be used by other power tools, for example: battery packs used in garden tools, in electric drills, etc., so that less battery packs need to be purchased and the cost can be reduced. At the same time, this configuration can also increase the usage rate of the battery pack <NUM>. In addition, since the power supply assembly <NUM> and the armrest frame <NUM> are designed to be separate, it is convenient for designers to optimize the packaging size.

As shown in <FIG> and <FIG>, the power supply assembly <NUM> further includes a bearing plate <NUM>, and the battery pack base <NUM> is fixed on the bearing plate <NUM>. The bearing plate <NUM> includes a plate-shaped part <NUM> cooperating with the battery pack base <NUM> and mating parts <NUM> set at two opposite ends of the plate-shaped part <NUM> to cooperate with the corresponding arm parts <NUM>. The plate-shaped part <NUM> is arranged between the pair of arm parts <NUM> of the armrest frame <NUM>, and the mating part <NUM> is provided with a fixing hole <NUM> that matches with the mounting hole <NUM>.

As shown in <FIG>, the battery pack base <NUM> is fixedly connected to the bearing plate <NUM> by screws <NUM>. The power supply assembly <NUM> is further provided with a safety key <NUM>. When power supply assembly <NUM> is not used, the safety key <NUM> should be removed so that the electric vehicle <NUM> cannot be started. The power supply assembly <NUM> further includes a socket (not shown) to provide power for the drive assembly <NUM> in a pluggable manner.

As shown in <FIG>, the battery pack base <NUM> is detachably installed on the armrest frame <NUM>. The electric vehicle <NUM> also includes a pair of quick clip locks <NUM> to hold the battery pack base <NUM> on the armrest frame <NUM>. The quick clip lock <NUM> includes a connecting rod <NUM> passing through the power supply assembly <NUM> and the mounting hole <NUM> on the arm parts <NUM>, a knob <NUM> connected to one end of the connecting rod <NUM>, a quick clip handle <NUM> pivotally mounted on the connecting rod <NUM>, and a spacer block <NUM> arranged between the quick clip handle <NUM> and the corresponding arm parts <NUM>. Since the arm parts <NUM> is provided with at least two mounting holes <NUM> along its length direction, the distance between each mounting hole <NUM> and the main body <NUM> is different, so that the user can adjust the mounting height of the power supply assembly <NUM> as needed. When in use, the power supply assembly <NUM> is placed on the armrest frame <NUM>, and then the end of the connecting rod <NUM> away from the quick clip handle <NUM> are passed through the spacer block <NUM>, the fixing hole <NUM>, and the mounting hole <NUM> in sequence, and then the knob <NUM> are installed on the connecting rod <NUM>. Finally, the quick clip handle <NUM> is rotated so that an eccentric part <NUM> of the quick clip handle <NUM> abuts the spacer block <NUM> so that fixing the power supply assembly <NUM> can be fixed firmly. At the same time, the power supply assembly <NUM> is connected to the hub motor <NUM> of the drive assembly <NUM> of the electric vehicle <NUM> and the control assembly <NUM> through the socket. When not in use, the power supply assembly <NUM> can be disassembled for better storage and saving storage space.

As shown in <FIG>, in order to adjust the installation height of the power supply assembly <NUM> easily, the arm parts <NUM> are provided with a plurality of mounting holes <NUM> along the extending direction of the arm parts <NUM>. However, this structure still has inconveniences. When the installation height of the power supply assembly <NUM> need to be adjusted, the user needs to remove the quick clip lock <NUM>, move the power supply assembly <NUM> up or down to another mounting hole <NUM>, and then reinstall and fix the quick clip lock <NUM>. This setting makes the operation relatively cumbersome. In order to simplify the step of adjusting the installation height of the power supply assembly <NUM>, a stroke groove (not shown) is provided between adjacent mounting holes <NUM>, so that the quick clip lock <NUM> can move from one mounting hole <NUM> to another mounting hole <NUM> through the stroke groove.

As shown in <FIG>, the pair of quick clip locks <NUM> can selectively hold the power supply assembly <NUM> on one of the opposite sides of the armrest frame <NUM>. At this time, the power supply assembly <NUM> is held on the outside of the armrest frame <NUM>. The power supply assembly <NUM> maybe fixed on the inner side of the armrest frame <NUM>, and the power supply assembly <NUM> can be fixed on the inner side of the armrest frame <NUM> at different heights. The quick clip handle <NUM> and the power supply assembly <NUM> are arranged on the same side of the opposite sides of the armrest frame <NUM>, which means that when the power supply assembly <NUM> is arranged on the outer side of the armrest frame <NUM>, the quick clip handle <NUM> is also arranged on the outer side of the armrest frame <NUM>, and vice versa. The power supply assembly <NUM> is detachably installed at different positions of the armrest frame <NUM> so that the electric vehicle <NUM> has different loading spaces, and when the goods are placed, the electric vehicle <NUM> can be with the largest transportation capacity through replacing different positions of the power supply assembly <NUM>.

As shown in <FIG>, the control assembly <NUM> is installed in the middle of the cross-bar part <NUM>. The control assembly <NUM> includes a fixing base <NUM>. The fixing base <NUM> includes an upper fixing base <NUM> and a lower fixing base <NUM> that can be matched with the upper fixing base <NUM>. In this embodiment, the control assembly <NUM> includes a control panel <NUM> which is installed on the fixing base <NUM> and close to the operator (the control panel <NUM> faces the operator, which is convenient for the operator to use), a forward and backward button <NUM> for controlling the moving direction of the electric vehicle <NUM>, a speed-control knob <NUM> for adjusting the walking speed of the electric vehicle <NUM>, a start button <NUM>, a lower left operating handle <NUM>, and a lower right operating handle <NUM>. The control panel <NUM> is further provided with a walking-control switch (not shown), a main power-control switch (not shown), and a main motor-control switch (not shown). The control panel <NUM> is fixed on the armrest frame <NUM> by screws <NUM>. The control panel <NUM> includes a power display area <NUM> to display the power of the power supply assembly <NUM>. In this embodiment, the power display area <NUM> is an LED light group which is capable of displaying power, and the number of the LED light group corresponds to the number of the battery pack <NUM>. Each LED lamp holder includes <NUM> LED lights to show the amount of power.

As shown in <FIG>, the control panel <NUM> is also provided with a membrane key assembly <NUM>. The membrane key assembly <NUM> is pasted on the side of the control panel <NUM> facing the operator through adhesive. In this embodiment, the power display area <NUM> and the forward and backward buttons <NUM> are integrated on the membrane key assembly <NUM>. Of course, it can be understood that, in other embodiments, other buttons, such as the speed-control knob <NUM>, can also be integrated on the membrane key assembly <NUM>, which is not limited in the disclosure. The control panel <NUM> is fixed on the armrest frame <NUM> by screws <NUM>, and a rubber sleeve (not shown) can be provided to penetrate the control panel <NUM> to increase the comfort and safety insulation when the control panel <NUM> is held. The start button <NUM> can trigger the main power-control switch. The lower left operating handle <NUM> and the lower right operating handle <NUM> can trigger the walking-control switch. The lower left operating handle <NUM> and the lower right operating handle <NUM> are pivotally mounted on the control assembly <NUM> through pivot shafts <NUM> and <NUM> respectively, so that the lower left operating handle <NUM> and the lower right operating handle <NUM> can be rotated around the pivot shafts <NUM> and <NUM>. The axes of the pivot shafts <NUM> and <NUM> are substantially perpendicular to the plane where the cross-bar part <NUM> is located. Such a setting allows the user to move the lower left operation handle <NUM> or the lower right operation handle <NUM> with the thumb, and make the lower left operation handle <NUM> or the lower right operation handle <NUM> fit the cross-bar part <NUM> to trigger the walking-control switch, which complies with ergonomics and also improves the comfort when used.

As shown in <FIG> and <FIG>, the lower left operating handle <NUM> and the lower right operating handle <NUM> are respectively provided with resisting arms <NUM>, <NUM> that cooperate with the walking-control switch, and the resisting arms <NUM>, <NUM> resist a lever (not shown) and then trigger the walking-control switch through the lever. The control assembly <NUM> is also provided with a left brake handle <NUM> and a right brake handle <NUM> to realize the disc brake or hub brake function, which means when the electric vehicle <NUM> is moving, the electric vehicle <NUM> can be decelerated through the left brake handle <NUM> or the right brake handle <NUM>, so that the electric vehicle <NUM> can be stopped. The lower left operating handle <NUM> and the lower right operating handle <NUM> are arranged below or directly below the cross-bar part <NUM>, and the left brake handle <NUM> and the right brake handle <NUM> are arranged in front or directly in front of the cross-bar part <NUM>. Of course, it can be understood that in other embodiments, the positions of the lower left operating handle <NUM> and the lower right operating handle <NUM>, and the positions of the left brake handle <NUM> and the right brake handle <NUM> can be interchanged.

As shown in <FIG>, when the electric vehicle <NUM> needs to be self-moved, the operator first presses the start button <NUM> so that it triggers the main power-control switch to activate the electric vehicle <NUM>, and then the lower left operating handle <NUM> and/or the lower right operating handle <NUM> are pulled to trigger the main motor-control switch (not shown). At this time, the drive assembly <NUM> is started to make the electric vehicle <NUM> self-move and pull the goods, the start button <NUM> can be released. When the moving direction of the electric vehicle needs to be changed, the forward and backward buttons <NUM> (shown in <FIG>) can be pressed to change the moving direction of the electric vehicle <NUM>. For example, when the electric vehicle <NUM> is moving forward and the forward and backward buttons <NUM> is pressed, the running direction of the electric vehicle <NUM> is changed from the forward to the backward. When the forward and backward button <NUM> is pressed again, the electric vehicle <NUM> will change to the forward again. When the operator releases the lower left operating handle <NUM> and the lower right operating handle <NUM>, the drive assembly <NUM> can be stopped and the electric vehicle <NUM> will stop moving. Of course, the operator can also first pull any one of the lower left operation handle <NUM> and the lower right operation handle <NUM> and then press the start button <NUM> to start the drive assembly <NUM>.

As shown in <FIG>, the speed control knob <NUM> toggle the potentiometer through gears. The speed control knob <NUM> can control the moving speed of the electric vehicle <NUM>. When the electric vehicle <NUM> is controlled to be self-moved, the speed control knob <NUM> can be dialed to adjust the moving speed of the hub motor <NUM>, so that the moving speed of the electric vehicle <NUM> can be adjusted.

As shown in <FIG>, the control panel <NUM> may also be provided with a brake, which is controlled by the lower left operating handle <NUM> and the lower right operating handle <NUM> to brake and stop the hub motor. When the electric vehicle <NUM> is in a stopped state, the brake can prevent the electric vehicle <NUM> from moving by itself. Therefore, the working process of the brake is different from that of the left brake handle <NUM> and the right brake handle <NUM>. When the operator releases the lower left operating handle <NUM> and the lower right operating handle <NUM>, the electric vehicle <NUM> can activate the brake at a set time. When the operator presses the start button <NUM> again, the brake will be invalid. This prevents the electric vehicle <NUM> from moving by itself when the ground is not flat. The brake is an electronic brake, which is controlled by software. When the lower left operating handle <NUM> and the lower right operating handle <NUM> are released, the brake of the electric vehicle <NUM> will be activated within <NUM> second. When the start button <NUM> is pressed, the brake function is invalid. The electric vehicle <NUM> can be pushed by hand, or the start button <NUM> and the lower left operating handle <NUM> or the lower right operating handle <NUM> can be pressed at the same time to start the main motor of the electric vehicle <NUM>, and the start button <NUM> is released simultaneously, the electric vehicle <NUM> can move and pull goods.

In summary, since the power supply assembly <NUM> of the electric vehicle <NUM> of the disclosure is fixedly installed on the armrest frame <NUM>, it is convenient for the user to replace the battery pack to realize the uninterrupted work of the electric vehicle <NUM>, so that the problem of insufficient battery life of the existing electric vehicles is solved.

As shown in <FIG>, the invention also provides an electric vehicle <NUM>, which includes a main body <NUM>, traveling wheels <NUM> arranged on the main body <NUM>, a driving assembly <NUM> and a power supply assembly <NUM>.

As shown in <FIG>, the main body <NUM> includes a body <NUM>, a frame <NUM> arranged below the body <NUM>, and a handle <NUM> arranged at the rear of the body <NUM>. The body <NUM> is, for example, a vehicle body. The body <NUM> is a long and narrow rectangle, and the upper part of the car body <NUM> is provided with an opening and the upper part of the opening is larger and the lower part is smaller, which is convenient for loading and unloading goods. The handle <NUM> is a U-shaped handle, and both ends of the U-shaped handle are fixed on the body <NUM>. The frame <NUM> is arranged along the bottom of the body <NUM>, and the front end of the frame <NUM> is also provided with a cross beam <NUM>. Please refer to <FIG>, when the electric vehicle <NUM> is lifted from the back to the front, the cross beam <NUM> is in contact with the ground and make the frame <NUM> stronger.

As shown in <FIG> and <FIG>, the traveling wheels <NUM> include driving wheels <NUM> and supporting wheels <NUM>. The driving wheels <NUM> are arranged at the rear of the main body <NUM>, and the supporting wheels <NUM> are arranged at the front of the main body <NUM>. Specifically, the driving wheels <NUM> and the supporting wheels <NUM> are arranged on the frame <NUM>. The driving wheels <NUM> are provided with hub motors. The driving wheels <NUM> are two and arranged side by side, and each driving wheel <NUM> is provided with a hub motor. There are also two supporting wheels <NUM>, and the supporting wheels <NUM> are, for example, universal wheels to facilitate the rotation of the electric vehicle <NUM>. In other embodiments, according to the actual load requirements of the vehicle, all or some of the traveling wheels can be selectively provided with hub motors.

As shown in <FIG>, the driving assembly <NUM> is used to control the traveling wheels <NUM>. The driving assembly <NUM> includes a hub motor and a controller <NUM> for controlling the hub motor. The hub motor is arranged on the traveling wheel <NUM>. The controller <NUM> includes a switch button <NUM> for controlling the start and stop of the hub motor. On one side of the switch button <NUM> is also provided with a speed-control handle <NUM> for controlling the rotation speed of the hub motor. The controller <NUM> is arranged on the handle <NUM>, which is convenient for controlling the speed of the electric vehicle <NUM> at any time. The controller <NUM> is, for example, sleeved on the handle <NUM>, and the controller <NUM> can also move along the handle <NUM>. When the controller <NUM> is moved to a suitable position, it can be fixed. The controller <NUM> also rotates along the central axis of the handle <NUM>, so that the controller <NUM> can be placed in a suitable position for the convenience of the operator.

As shown in <FIG>, the power supply assembly <NUM> is used to provide power for the drive assembly <NUM>, and the power supply assembly <NUM> is arranged at the rear part of the main body <NUM>. As can be understood, the rear part may be a rear/rear side of the main body <NUM> or a rear part including a part of the bottom. Specifically, the power supply assembly <NUM> includes a battery pack <NUM>, a battery pack accommodating part <NUM>, and a fixing part <NUM> for assembling the battery pack accommodating part <NUM> on the main body <NUM>. The number of battery pack <NUM> is two.

As shown in <FIG>, the battery pack accommodating part <NUM> is fixed at the rear of the body <NUM>, specifically located below the handle <NUM>. The distance between the handle <NUM> and the body <NUM> is greater than the thickness of the battery pack accommodating part <NUM>, so that when the electric vehicle <NUM> is pushed or lifted and the center of gravity of the body is stable, it is not easy to tip over, and convenient to operate. The top of the battery pack accommodating part <NUM> is open, and the battery pack <NUM> is assembled to the battery pack accommodating part <NUM> from the opening. The battery pack accommodating part <NUM> includes a side wall <NUM> and a bottom wall <NUM> connected to the side wall <NUM>. The fixing part <NUM> includes two mounting plates <NUM> extending from the side wall <NUM> to both sides and a fastener <NUM>. The fastener <NUM> passes through the mounting plates <NUM> and fix the mounting plates <NUM> on the main body <NUM>, which means, on the body <NUM>. The fastener <NUM> can be a bolt. One or more reinforcing ribs <NUM> are provided between the mounting plate <NUM> and the side wall <NUM> to strengthen the mounting plate <NUM>.

As shown in <FIG>, the opening of the battery pack accommodating part <NUM> is provided with a key holder <NUM>, and the key holder <NUM> is provided with a pluggable safety key <NUM>. The safety key <NUM> is used to control the conduction or disconnection of the battery pack <NUM>. For example, the conduction or disconnection of the battery pack can be realized through rotating the safety key <NUM>.

In summary, in the embodiment of the electric vehicle of the invention, the power supply assembly is arranged at the rear of the main body of the electric vehicle, and the opening of the battery pack accommodating part is arranged upward, which facilitates the installation and disassembly of the battery pack and improve work efficiency. In addition, a hub motor is set on the traveling wheels to drive the vehicle instead of manual push, which can greatly save the time of goods transportation, and it is very labor-saving. It also can effectively avoid the overturning when going uphill. In addition, the design of the hub motor makes the overall structure of the electric vehicle simple, easy to operate, labor-saving, and practical. Furthermore, the controller is arranged on the handle of the electric vehicle, which is convenient to control the start and stop of the electric vehicle and adjust the moving speed at any time.

As shown in <FIG>, the invention further provides an electric vehicle <NUM>, which includes a main body <NUM>, traveling wheels <NUM> arranged on the main body <NUM>, a driving assembly <NUM> and a power supply assembly <NUM>.

As shown in <FIG>, the main body <NUM> includes a body <NUM>, a frame <NUM> arranged below the body <NUM>, and a handle <NUM> arranged at the rear of the body <NUM>. The body <NUM> is, for example, a cabin. The body <NUM> is roughly a cuboid. A plurality of storage spaces are arranged in the body <NUM>. The body <NUM> includes a first space 111a, a second space <NUM>, and a third space <NUM> that are sequentially arranged from front to back. The first and third spaces open upward, and the second space <NUM> opens to one side. The frame <NUM> is a flat-plate shaped and is arranged substantially parallel to the ground. There is also a fourth space <NUM> which opens on one side in the middle of the lower part of the body <NUM>, which is convenient for sorting, placing and fetching goods.

As shown in <FIG> and <FIG>, the handle <NUM> includes a first handle <NUM> located at the rear and upper of the body <NUM> and a second handle <NUM> located at the front and upper of the body <NUM>. This arrangement makes it convenient to push the electric vehicle <NUM> from front or rear. The handle <NUM> is integrally formed with the body <NUM>. Each handle <NUM> includes a holding part <NUM> arranged along the width direction of the body <NUM> and a connecting part <NUM> connecting the holding part <NUM> and the body <NUM>.

As shown in <FIG>, the drive assembly <NUM> is used to control the traveling wheels <NUM> to move. The drive assembly <NUM> includes a hub motor arranged on the traveling wheels <NUM>. The controller <NUM> is used to control the hub motor. The traveling wheels <NUM> include driving wheels <NUM> and supporting wheels <NUM>. Specifically, the hub motor is arranged on the driving wheels <NUM>. The driving wheels <NUM> are arranged at the rear of the main body <NUM>, and the supporting wheels <NUM> are arranged at the front of the main body <NUM>. Specifically, the driving wheels <NUM> and the supporting wheels <NUM> are arranged on the frame <NUM>. There are two driving wheels <NUM> and they are arranged side by side. There are also two supporting wheels <NUM>, and they can be universal wheels to facilitate the rotation of the electric vehicle <NUM>. In other embodiments, according to the actual load requirements of the electric vehicle, all or some of the traveling wheels can be selectively provided with hub motors.

As shown in <FIG> and <FIG>, the controller <NUM> includes a switch button <NUM> for controlling the start and stop of the hub motor and a speed-control handle <NUM> for controlling the rotation speed of the hub motor. The controller <NUM> is arranged on the first handle <NUM> or the second handle <NUM> to facilitate the control of the speed of the electric vehicle <NUM> at any time. In the disclosure, the controller <NUM> is arranged on the first handle <NUM>. With this arrangement, the distance between the controller <NUM>, and the battery pack <NUM> and the hub motor is closer. The structure is compact, and the installation is convenient.

As shown in <FIG>, the power supply assembly <NUM> is used to provide power for the drive assembly <NUM>, and the power supply assembly <NUM> is arranged at the bottom of the main body <NUM> and is arranged close to the rear end of the main body <NUM>. Specifically, the power supply assembly <NUM> includes a battery pack <NUM>, a battery pack accommodating part <NUM>, and a fixing part <NUM> for assembling the battery pack accommodating part <NUM> on the main body <NUM>. The number of battery pack <NUM> is two.

As shown in <FIG>, the battery pack accommodating part <NUM> is fixed at the bottom and rear of the frame <NUM>. The battery pack accommodating part <NUM> is open at the rear, and the battery pack <NUM> is assembled to the battery pack accommodating part <NUM> from the opening from top to bottom. The opening of the battery pack accommodating part <NUM> is flush with the rear edge of the frame <NUM>, and this arrangement facilitates the installation and disassembly of the battery pack <NUM>. The battery pack accommodating part <NUM> does not protrude from the frame <NUM> and does not occupy additional space. The electric vehicle <NUM> has a compact structure. In other embodiments, the battery pack accommodating part <NUM> may also be arranged at the bottom of the front end of the main body <NUM>. In this case, the battery pack accommodating part <NUM> needs to be set as a front opening to facilitate the installation and disassembly of the battery pack.

As shown in <FIG>, the battery pack accommodating part <NUM> includes a side wall <NUM>, a top wall 421a and a bottom wall <NUM> connected to the side wall <NUM>. The fixing part includes a mounting plate <NUM> extending from the top wall 421a to both sides, a mounting post <NUM> arranged above the mounting plate <NUM> and bolts. The bolts pass through the mounting post <NUM> and fix the mounting plate <NUM> on the main body <NUM>, which means, on the body <NUM>. A number of reinforcing ribs <NUM> are arranged between the mounting plate <NUM> and the side wall <NUM> in order to strengthen the mounting plate <NUM>.

As shown in <FIG>, a safety lock <NUM> and a safety key <NUM> are provided at the opening of the battery pack accommodating part <NUM>. The safety lock <NUM> and the safety key <NUM> cooperate with each other to control the conduction and disconnection of the battery pack <NUM>.

Claim 1:
An electric vehicle (<NUM>) comprising:
a main body (<NUM>);
traveling wheels (<NUM>), arranged on the main body (<NUM>);
a drive assembly (<NUM>), arranged on the main body (<NUM>), wherein the drive assembly (<NUM>) includes a hub motor (<NUM>) which is arranged on the traveling wheels (<NUM>); and
a controller (<NUM>), used to control the hub motor (<NUM>); and
a control assembly (<NUM>) comprising
a start button (<NUM>),
a lower left operating handle (<NUM>), and
a lower right operating handle (<NUM>)
characterized in that the lower left operating handle (<NUM>) and the lower right operating handle (<NUM>) are arranged releasable, and when in a released state, a braking structure of the electric vehicle (<NUM>) is activatable within a set time and in that the control assembly (<NUM>) further includes a left brake handle (<NUM>) and a right brake handle (<NUM>), wherein the lower left operating handle (<NUM>) and the lower right operating handle (<NUM>) are arranged below or directly below a cross-bar part (<NUM>), and the left brake handle (<NUM>) and the right brake handle (<NUM>) are arranged in front of or directly in front of the cross-bar part (<NUM>).