Patent Description:
In a known drive motor structure of an electrical vehicle, an electromagnetic device and a transmission axle are directly mounted on a housing, while a reduction and transmission mechanism is arranged in a loading path between the electromagnetic device and the transmission axle and coupled thereto. The electromagnetic device, when subjected to electromagnetism to operate to drive the transmission axle, is affected by high-speed rotation and loading variation to generate vibration at high frequencies. Being subjected to the vibration of high frequencies, the housing may suffer loosening of fastening elements, so as to cause positional shifting of an axis line of the rotating parts to thereby induce abrasion and thus leading to damage or malfunction of the motor structure. Further, to control the operation and to detect a state of operation, the motor structure is often provided, in the interior thereof, with a control board that includes a plurality of electronic components. However, the control board is not properly protected and the electronic components arranged thereon are susceptible to inference by electrical waves or magnetism of the electromagnetic device, making the control board issuing incorrect instruction or data due to such interference.

In other words, the motor of the known electrical vehicle suffers operation deficiency of easy damage and malfunction caused by the previously discussed insufficiency of supporting strength and susceptibility of the control board to inference.

Prior patent documents are known, such as <CIT> and <CIT>.

<CIT> discloses a drive device that includes a plurality of gears, a first shaft, and a bearing supporting the first shaft and transmitting power of the motor, a housing that accommodates the transmission mechanism and holds the bearing on an inner face, oil that collects in a lower region inside the housing, a catch tank that is disposed inside the housing and opens upward, an oil passage through which the oil passes, and an oil pump provided in the oil passage. The oil passage has a first path connecting the oil pump and the catch tank and a scooping path for scooping the oil by rotation of the gear to guide the scooped oil to the catch tank. The catch tank includes a feed portion for supplying the oil to the gear or the bearing.

<CIT> discloses an actuator that is provided with: a motor; an output shaft; and a speed reduction unit that includes at least one metal gear having metal teeth, and that reduces the speed of rotation of the motor and transmits the reduced speed to the output shaft. The actuator is provided with a housing in which the motor and the speed reduction unit are accommodated. The actuator is provided with a plate member for preventing flying objects, which are generated by the operation of the speed reduction unit and that fly from the metal gear side, from flying into spaces in the interior of the housing other than the space in which the metal gear is arranged.

The primary objective of the present invention is to a motor structure that effectively enhances the structural strength and stability thereof in order to reduce events of loosening or axis line shifting and abrading resulting from vibration to thereby improve operation safety to further extend the service life of the motor.

The secondary objective of the present invention is to provide a motor structure that allows a control board to be properly protected to reduce interference of electronic components arranged thereto by electrical waves or magnetism of an electromagnetic device in order to reduce normal operation of the motor being influenced by false operations.

The present invention provides a motor structure, which comprises: a housing, which is formed of a first casing member and a second casing member that are fastened to and connected with each other, a support and separation board being arranged and clamped between the first and second casing members; and a drive unit, which is arranged between the first and second casing members of the housing and is supported by the support and separation board, the drive unit comprising an electromagnetic device mounted to one side surface of the support and separation board, the electromagnetic device comprising an output axle penetrating through the support and separation board, a transmission axle being arranged between the first and second casing members of the housing for transmitting power to outside of the housing, the transmission axle penetrating through the support and separation board, a reduction and transmission mechanism being arranged in a loading path between the output axle of the electromagnetic device and the transmission axle, wherein the reduction and transmission mechanism comprises a reduction gear arranged on one side surface of the support and separation board that is opposite to the electromagnetic device to be in mating engagement with and driven by the output axle; and the reduction gear comprises a first drive wheel coaxially rotatable therewith, and the transmission axle is provided with a second drive wheel corresponding to the first drive wheel, and a drive member is arranged between the first and second drive wheels to establish a transmission arrangement, wherein a rotational speed ratio between the output axle and the transmission axle is variable by means of a change of a diameter ratio between the reduction gear and the first drive wheel and between the first drive wheel and the second drive wheel, and wherein the support and separation board comprises a protection frame mounted thereto at a location corresponding to where the output axle and the reduction gear are set in mating engagement with each other.

A motor structure according to the present invention is generally illustrated in <FIG>, <FIG>, and <FIG>, and comprises a drive unit <NUM> that is arranged in an interior of a housing <NUM> to be oppositely connected to and fixedly mounted in the housing <NUM>. The housing <NUM> is formed of a first casing member <NUM> and a second casing member <NUM> that are oppositely fastened to and connected with each other. A support and separation board <NUM> is arranged between the first and second casing members <NUM>, <NUM> as being sandwiched thereby. The support and separation board <NUM> has a circumferential edge that is provided with a plurality of fastening barrels <NUM> each of which has a through hole having two penetrating ends. The second casing member <NUM> is provided, on an inner side thereof, with a plurality of fastening holes <NUM> respectively corresponding to the fastening barrels <NUM> to be each receiving a fastening member <NUM> penetrating from one side of the support and separation board <NUM> through a corresponding one of the fastening barrels <NUM> to connect to the fastening hole <NUM> of the second casing member <NUM> (as shown in <FIG>), so as to have the support and separation board <NUM> fastened to the second casing member <NUM> and sandwiched thereto by the first casing member <NUM>, wherein the support and separation board <NUM> is provided for mounting and supporting the drive unit <NUM>.

The drive unit <NUM> is better shown in <FIG>, <FIG>, and <FIG>. The drive unit <NUM> comprises an electromagnetic device <NUM> fastened to one side surface of the support and separation board <NUM>. The electromagnetic device <NUM> comprises an output axle <NUM> penetrating through the support and separation board <NUM>. Further, the output axle <NUM> of the electromagnetic device <NUM> is rotatably mounted to the second casing member <NUM> that is opposite to the support and separation board <NUM> by a first bearing <NUM>. The second casing member <NUM> is provided with a first axle trough <NUM> (as shown in <FIG>) for mounting the first bearing <NUM>. Further, the drive unit <NUM> comprises a reduction gear <NUM> that is mounted to one side surface of the support and separation board <NUM> that is opposite to the electromagnetic device <NUM> and is in mating engagement with and driven by the output axle <NUM>. Two opposite ends of the reduction gear <NUM> are synchronously and rotatably supported on the support and separation board <NUM> and the second casing member <NUM> opposite thereto by means of a second bearing <NUM> and a third bearing <NUM>, respectively. The second casing member <NUM> is provided with a second axle trough <NUM> (as shown in <FIG>) for mounting the third bearing <NUM> in order to ensure stable mating engagement and smooth operation between the output axle <NUM> and the reduction gear <NUM>. Further, the support and separation board <NUM> is provided with a protection frame <NUM> mounted thereto at a location corresponding to where the output axle <NUM> and the reduction gear <NUM> engage with each other to provide an effect of protection and reduction of foreign objects falling therein. Further, the reduction gear <NUM> comprises a first drive wheel <NUM> coaxially rotatable therewith. A transmission axle <NUM> is arranged between the first and second casing members <NUM>, <NUM> to transmit power to outside of the housing <NUM>, and the transmission axle <NUM> penetrates through the support and separation board <NUM>. Further, the transmission axle <NUM> is provided with a second drive wheel <NUM> at a location corresponding to the first drive wheel <NUM> of the reduction gear <NUM>, wherein the second drive wheel <NUM> is coaxially and synchronously rotatable with the transmission axle <NUM>. At least one drive member <NUM> is arranged between and loops around the first and second drive wheels <NUM>, <NUM>, so that the reduction gear <NUM> may drive the transmission axle <NUM> by means of the drive member <NUM>. Further, the first and second drive wheels <NUM>, <NUM> and the drive member <NUM> can be selected as chain wheels and a chain, or pulleys and a belt. The first drive wheel <NUM> and the second drive wheel <NUM> may be set to have different ratios between diameters thereof to change a ratio of speeds thereof. The reduction gear <NUM>, the first drive wheel <NUM>, the second drive wheel, <NUM> and the drive member <NUM> jointly form a reduction and transmission mechanism of a loading path between the output axle <NUM> and the transmission axle <NUM>.

Further, the housing <NUM> is provided, in the interior thereof, with a control board <NUM> that issues operation instructions and data, wherein the control board <NUM> at least comprises a microprocessor <NUM>, and at least one sensor <NUM>, at least one global positioning system (GPS) device <NUM>, at least one transmission device <NUM>, and at least one operation module <NUM> that are in connection with the microprocessor <NUM> for motor operation control, motor operation state detection, distance detection, carbon emission calculation, and data transmission, respectively. The control board <NUM> is arranged on one side surface of the support and separation board <NUM> that is opposite to the electromagnetic device <NUM>, so that interference of the control board <NUM> by the electromagnetic device <NUM> on the opposite side of the support and separation board <NUM> can be reduced.

As such, the electromagnetic device <NUM> of the motor utilizes electromagnetism to make the output axle <NUM>, which serves as a rotor, rotating at a high speed, which is then converted by the reduction and transmission mechanism to an increased torque for subsequently drive the transmission axle <NUM> that transmits the power to the outside of the housing <NUM>, so as to allow the motor to drive an electrical vehicle to move, and as such, a motor structure that has a good structural strength and is not easily interfered with is formed.

By means of the previously discussed structural arrangement, in a practical application of the present invention, as shown in <FIG>, <FIG>, and <FIG>, when the drive unit <NUM> of the motor is operating the transmission axle <NUM> to transmit power to the outside, since the support and separation board <NUM> is arranged and sandwiched between the first and second casing members <NUM>, <NUM> of the housing <NUM>, the output axle <NUM> of the drive unit <NUM> and the reduction gear <NUM> of the reduction and transmission mechanism are jointly connected to the housing <NUM> and the support and separation board <NUM>, and thus, the housing <NUM> is effectively supported and high-frequency vibration caused by the high-speed operation of the electromagnetic device <NUM> of the drive unit <NUM> can be effectively distributed and absorbed to thereby reduce vibration and noise, so as to reduce events of loosening or axis line shifting resulting from high-frequency vibration and effectively reduce abrasion and failure of the rotating parts to thus extend the service life of the motor.

Further, the support and separation board <NUM> arranged in the interior of the housing <NUM> can separate the electromagnetic device <NUM> and the control board <NUM> of the drive unit <NUM> from each other, so that electrical wave or magnetism of the electromagnetic device <NUM> interfering with the microprocessor <NUM>, the sensor <NUM>, the GPS device <NUM>, the transmission device <NUM>, or the operation module <NUM> arranged on the control board <NUM> can be reduce to thereby reduce occurrence of false operations.

Claim 1:
A motor structure, comprising:
a housing (<NUM>), which is formed of a first casing member (<NUM>) and a second casing member (<NUM>) that are fastened to and connected with each other, a support and separation board (<NUM>) being arranged and clamped between the first and second casing members (<NUM>, <NUM>); and
a drive unit (<NUM>), which is arranged between the first and second casing members (<NUM>, <NUM>) of the housing (<NUM>) and is supported by the support and separation board (<NUM>), the drive unit (<NUM>) comprising an electromagnetic device (<NUM>) mounted to one side surface of the support and separation board (<NUM>), the electromagnetic device (<NUM>) comprising an output axle (<NUM>) penetrating through the support and separation board (<NUM>), a transmission axle (<NUM>) being arranged between the first and second casing members (<NUM>, <NUM>) of the housing (<NUM>) for transmitting power to outside of the housing (<NUM>), the transmission axle (<NUM>) penetrating through the support and separation board (<NUM>), a reduction and transmission mechanism being arranged in a loading path between the output axle (<NUM>) of the electromagnetic device (<NUM>) and the transmission axle (<NUM>),
wherein the reduction and transmission mechanism comprises a reduction gear (<NUM>) arranged on one side surface of the support and separation board (<NUM>) that is opposite to the electromagnetic device (<NUM>) to be in mating engagement with and driven by the output axle (<NUM>); and the reduction gear (<NUM>) comprises a first drive wheel (<NUM>) coaxially rotatable therewith, and the transmission axle (<NUM>) is provided with a second drive wheel (<NUM>) corresponding to the first drive wheel (<NUM>), and a drive member (<NUM>) is arranged between the first and second drive wheels (<NUM>, <NUM>) to establish a transmission arrangement, wherein a rotational speed ratio between the output axle (<NUM>) and the transmission axle (<NUM>) is variable by means of a change of a diameter ratio between the reduction gear (<NUM>) and the first drive wheel (<NUM>) and between the first drive wheel (<NUM>) and the second drive wheel (<NUM>),
characterized in that the support and separation board (<NUM>) comprises a protection frame (<NUM>) mounted thereto at a location corresponding to where the output axle (<NUM>) and the reduction gear (<NUM>) are set in mating engagement with each other.