Multiband antenna transmission device

A multiband antenna transmission, including: a driving gear, a shifter, and a plurality of screw assemblies. The position and the driving gear are coaxially and rotatably arranged, and the shifter comprises a plate and a boss protruding from a side of the plate. The plurality of screw assemblies are arranged in a circumferential direction of the driving gear. Each of the plurality of screw assemblies includes: a lead screw, a driven gear selectively connected with or separated from the lead screw, and a first elastic member arranged between the lead screw and the driven gear. The boss is configured to sequentially push the driven gear of the respective screw assembly during rotation of the shifter, such that the driven gear is connected with the corresponding lead screw and whereby the driven gear is in mesh with the driving gear for transmission.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is the International Application No. PCT/CN2018/080474 for entry into US national phase with an international filing date of Mar. 26, 2018, designating US, now pending, and claims priority to Chinese Patent Application No. 201711276400.5, filed on Dec. 6, 2017, the contents of which are incorporated herein by reference.

TECHNICAL FIELD

The present application relates to the technical field of transmission device for mobile communication antennas, and more particularly to a multiband antenna transmission device.

BACKGROUND

With the development of mobile communication technology, large-capacity multi-band antennas have become an important development trend of mobile communication antennas. To accommodate more antennas within a limited space, it is not possible to simply assemble multiband antennas together, which would otherwise make the whole antenna bulky, heavy, and inefficient.

A large-capacity multiband antenna of an existing product, in which a plurality of frequency bands are collectively assembled in a single antenna, a regulator for the respective frequency band is connected with a rack, and a plurality of racks are arranged side by side on a plane and driven by a common driving gear to move, thereby realizing the regulation. Regulation of the different racks is achieved when the common gear meshes with different racks at different positions. Since the common gear has to be moved to different racks positions, strict requirements are imposed on the positions of the common gear and the racks, and the common gear of the existing product is prone to be jammed when moving, which affects the timeliness and accuracy of the regulation of the antenna.

Technical Problem

It is an object of the present application to provide a multiband antenna transmission device, so as to solve the technical problem that the existing multiband antenna adopts the gear and racks to regulate positions, which imposes strict requirements on the positions of the gear and the racks and would result in jamming of the common gear during the moving thereof.

Technical Solutions

In order to achieve the above object, the technical solution adopted by the present application is to provide a multiband antenna transmission device, including:

a driving gear;

a shifter, where the shifter and the driving gear are coaxially and rotatably arranged, and the shifter comprises a plate and a boss protruding from a side of the plate; and

a plurality of screw assemblies, arranged in a circumferential direction of the driving gear, with each of the plurality of screw assemblies including: a lead screw, a driven gear selectively connected with or separated from the lead screw, and a first elastic member arranged between the lead screw and the driven gear. The boss is configured to sequentially push the driven gear of the respective screw assembly during rotation of the shifter, such that the driven gear is connected with the corresponding lead screw and whereby the driven gear is in mesh with the driving gear for transmission.

BENEFICIAL EFFECTS

By rotating the shifter, the boss of shifter pushes one of the driven gears such that the driven gear is connected with the corresponding lead screw, and whereby the driven gear is in mesh with the driving gear for transmission, thereby driving the lead screw to rotate, and in such condition, the first elastic member is in a compressed state, in which the first elastic member can reliably transmit the power of the driven gear to the lead screw. By rotating the shifter, the boss of shifter does not push the above-mentioned driven gear, and the first elastic member is elongated, such that the driven gear is reset and separated from the driving gear, and the power transmission is cut off. The multiband antenna transmission adopts a circumferential layout, which saves a lot of space and minimizes the overall volume. The screw assembly to be regulated is determined by the shifter to achieve one driving power completing the regulation of a plurality of screw assemblies, that is, one drags multiple, and the other power source is the regulation power configured to regulate the shifter. The connected driven gear and lead screw and the compressed first elastic member are jointly driven and rotated, so that the regulation action is smoother and the jamming phenomenon is avoided.

DETAILED DESCRIPTION OF THE DRAWINGS

In order to make the technical problems to be solved, technical solutions, and beneficial effects of the present application more clear, the present application will be further described in detail hereinbelow with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely intended to explain the application rather than to limit the present application.

It should be noted that when an element is referred to as being “fixed” or “arranged” at/in/on another element, it can be directly at/in/on the other element. When an element is referred to as being “connected” to/with the another element, it can be directly or indirectly connected to/with the other element.

It should be understood that the orientation or positional relationship indicated by terms “length”, “width”, “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, bottom”, “inside”, “outside”, or the like is based on the orientation or positional relationship shown in the drawings, and is merely for facilitating and simplifying the description of the present application, and does not indicate or imply that the device or component referred to must have a particular orientation or be constructed and operated in a particular orientation, and thus are not to be construed as defining the present application.

Moreover, the terms “first” and “second” are adopted for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining “first” and “second” may include one or more of the features either explicitly or implicitly. In the description of the present application, the meaning of “a plurality of” or “multiple” is two or more unless otherwise particularly defined.

Referring toFIGS. 1-3, the multiband antenna transmission device provided by the present application is described herein. The multiband antenna transmission includes: a driving gear10, a shifter20, and a plurality of screw assemblies30. The shifter20and the driving gear10are coaxially and rotatably arranged, and the shifter20includes a plate21and a boss22protruding from a side of the plate21. The plurality of screw assemblies30are arranged in a circumferential direction of the driving gear10. Each of the plurality of screw assemblies30includes: a lead screw31, a driven gear32selectively connected with or separated from the lead screw31, and a first elastic member33arranged between the lead screw31and the driven gear32. The boss22is configured to sequentially push the driven gear32of one of the plurality of screw assemblies30during rotation of the shifter20, such that the driven gear32of the one of the plurality of screw assemblies is connected with the corresponding lead screw31and the driven gear32of the one of the plurality of screw assemblies meshes with the driving gear10for transmission.

By rotating the shifter20, the boss22of shifter20pushes one of the driven gears32such that the driven gear32is connected with the corresponding lead screw31, and the driven gear32meshes with the driving gear10for transmission, thereby driving the lead screw31to rotate, and in such condition, the first elastic member33is in a compressed state, in which the first elastic member33can reliably transmit the power of the driven gear32to the lead screw31. By rotating the shifter20, the boss22of shifter20does not push the above-mentioned driven gear32, and the first elastic member33is elongated, such that the driven gear32is reset and separated from the driving gear10, and the power transmission is cut off. The multiband antenna transmission adopts a circumferential layout, which saves a lot of space and minimizes the overall volume. The screw assembly30to be regulated is determined by the shifter20to achieve one driving power completing the regulation of a plurality of screw assemblies30, that is, one drags multiple, and the other power source is the regulation power configured to regulate the shifter20. The connected driven gear32and lead screw31and the compressed first elastic member33are jointly driven and rotated, so that the regulation action is smoother and the jamming phenomenon is avoided.

The driving gear10is rotatable about its own axis, but is unable to move forward or backward.

The shifter20is sleeved outside the driving gear10and coaxial with the driving gear10, the shifter20is able to rotate about its own axis, but does not rotate along with the rotation of the driving gear10, and the shifter20cannot move forward or backward. A smooth guiding surface221is provided between each of two ends of the boss22and the plate21, thereby guiding an end face of the respective lead screw assembly30to move to a highest position of the boss22.

The plurality of screw assemblies30are uniformly and circumferentially distributed around an axis of the driving gear10. Under the action of the first elastic member33, the end face of the corresponding screw assembly30is in contact with the shifter20, and is able to be in contact with the plate21or the boss22. A distance between the axis of boss22and an axis of the shifter20is equal to a distance between an axis of respective screw assembly30and the axis of shifter20. The shifter20is rotated to rotate the boss22to different positions and is capable of pushing the respective driven gears32in the axial direction of the driven gear32.

The front and rear positions of the driven gear32are not fixed, the driven gears32are slidably mounted on a frame, and are also rotatable about their own axes. One end of the first elastic member33is in contact with the driven gear32, and the other end is in contact with the end face of the lead screw31. The lead screw31and the driven gear32are on the same axis, and the lead screw31is unable to move forward or backward but is able to rotate about its own axis.

In a normal state, the end face of the respective screw assembly30is in contact with the plate21, and the tooth face of the driven gear32is not in contact with the tooth face of the driving gear10, in such condition, the rotation of the driving gear10does not affect the position of the driven gear32or the position of the lead screw31. In such condition, the first elastic member33is not significantly compressed either, and the driven gear32and the corresponding lead screw31are also separated from each other.

When regulation is required, by rotating the shifter20, the boss22on the shifter20is rotated to a back of a certain screw assembly30, and the boss22pushes the corresponding driven gear32to move to a position where the corresponding driven gear32contacts with the tooth face of the drive gear10, and the driven gear32and an end of the lead screw31are in a connected state. In such condition, the rotation of the driving gear10will drive the driven gear32to rotate, the power of the driving gear10is transmitted to the lead screw31by the connection between the driven gear32and the lead screw31and by the first elastic member33, the rotation of lead screw31drives the corresponding regulator to work.

The lead screw31and the driven gear32are coaxially arranged, and the end of the lead screw31and the driven gear32are selectively connected with or separated from each other in the axial direction. In case that the lead screw31and the driven gear32are not timely connected, since the first elastic member33is compressed in such condition, the rotation of the driven gear32is transmitted to the lead screw31through the first elastic member33. The first elastic member33ensures timely transmission of rotation when the lead screw31and the driven gear32are not reliably connected.

The driving gear10, the shifter20, and the screw assembly30are all mounted on the frame (not shown in figures).

Further, as a specific embodiment of the multiband antenna transmission device provided by the present application, the respective screw assembly30further includes a second elastic member34arranged for the corresponding driven gear32, and a distal end of the second elastic member34away from the driven gear32faces the shifter20, and when the shifter20rotates, the boss22sequentially abuts against the distal end of the second elastic member34of one of the plurality of screw assemblies30to push the corresponding driven gear32, thereby enabling the corresponding driven gear32to be connected with the lead screw31and to mesh with the driving gear10for transmission. One end of the second elastic member34is in contact with the end face of the driven gear32, and the other end is in contact with the shifter20, and the second elastic member34is compressible along its axis. The boss22is rotated to different positions by rotating the shifter20and is therefore capable of contacting with different second elastic members34. The second elastic member34is configured to enable the boss22to reliably push one of the driven gears32to move via the corresponding second elastic member34.

In the normal state, the end face of the respective screw assembly30is in contact with the plate21, the second elastic member34is not significantly compressed, and the tooth face of the driven gear32is not in contact with the tooth face of the driving gear10, in such condition, the rotation of the driving gear10does not affect the position of the driven gear32or the position of the lead screw31. In such condition, the first elastic member33is not significantly compressed either, and the driven gear32and the corresponding lead screw31are also separated from each other.

When regulation is required, by rotating the shifter20, the boss22on the shifter20is rotated to a back of a certain screw assembly30, the boss22pushes the corresponding second elastic member34, which makes the second elastic member34compressed and further push the corresponding driven gear32to move to a position where the corresponding driven gear32contacts with the tooth face of the drive gear10, and the driven gear32and an end of the lead screw31are in a connected state. In such condition, the rotation of the driving gear10will drive the driven gear32to rotate, the power of the driving gear10is transmitted to the lead screw31by the connection between the driven gear32and the lead screw31and by the first elastic member33, the rotation of lead screw31drives the corresponding regulator to work.

Further, as a specific embodiment of the multiband antenna transmission device provided by the present application, the distal end of each second elastic member34away from the corresponding driven gear32is connected with an abutting block35. The abutting block35can reliably abut against the plate21or the boss22of the shifter20, which makes the operation reliable.

Further, as a specific embodiment of the multiband antenna transmission device provided by the present application, in each of the plurality of screw assemblies30, the lead screw31and the driven gear32are selectively connected with or separated from each other by a coupler. The end of the lead screw31close to the driven gear32is connected with the driven gear32via the coupler which can be in various forms, and the coupler is capable of transmitting the rotation of the driven gear32to the lead screw31. The first elastic member33ensures timely transmission of the rotation when the coupler is not reliably connected. The coupler and the compressed first elastic member33are jointly driven and rotated to make the regulation action smoother and avoid the jamming phenomenon.

Further, as a specific embodiment of the multiband antenna transmission device provided by the present application, in each of the plurality of screw assemblies30, one side of the driven gear32is provided with a shaped hole321, and one end of the lead screw31is provided with an insertion shaft311configured to be inserted and fitted into the shaped hole321. The shaped hole321may be a regular polygonal hole or a D-shaped hole or other type of holes, and accordingly, the insertion shaft311is an insertion shaft with fitted shape. Or alternatively, in each of the plurality of screw assemblies30, one side of the driven gear32is provided with a spline slot, and one end of the lead screw31is provided with a spline shaft configured to be inserted and fitted into the spline slot. Specific embodiment can be selected as needed. The connection state is achieved when the shaft is inserted into the hole or the groove, and the separation state is achieved when the shaft is separated from the hole or the groove.

Further, as a specific embodiment of the multiband antenna transmission device provided by the present application, in each of the plurality of screw assemblies30, two ends of the first elastic member33abut against one end of the lead screw31and a side face of the driven gear32respectively. The structure is easy to be processed and assembled, and the first elastic member33is reliably disposed between the lead screw31and the driven gear32. The lead screw31and the driven gear32are selectively connected with or separated from each other. When the first elastic member33is compressed, the rotation of the driven gear32can be transmitted to the lead screw31through the first elastic member33, thereby avoiding the untimely connection between the lead screw31and the driven gear32.

Further, as a specific embodiment of the multiband antenna transmission device provided by the present application, in each of the plurality of screw assemblies30, a side of the driven gear32facing toward the lead screw31extends to form a limit segment322, and the first elastic member33is sleeved outside the limit segment322. The structure facilitates the assembly of the first elastic member33.

Further, as a specific embodiment of the multiband antenna transmission device provided by the present application, the driving gear10includes a gear portion11and a connection shaft12connected with the gear portion11, the plate21defines therein a through hole211, and the connection shaft12passes through the through hole211. Such technical solution makes the structure be easily assembled and compact.

Further, as a specific embodiment of the multiband antenna transmission device provided by the present application, the shifter20further includes an external gear23connected with a side of the plate21away from the boss22, and the connection shaft12sequentially passes through the through hole211and an inner hole of the external gear23, and the external gear23meshes with an input gear40. The rotation of the input gear40drives the external gear23to rotate, so that the boss22of the shifter20rotates, and the rotation of the shifter20does not drive the driving gear10to rotate. The input gear40is rotatable about itself, and it cannot be moved forward or backward. The input gear40is mounted to the frame.

Further, as a specific embodiment of the multiband antenna transmission device provided by the present application, the axis of the driving gear10and the axis of the lead screw31of each of the plurality of screw assemblies30are parallel to each other. The solution results in easy assemblage and a compact structure. The circumferential layout saves a lot of space and minimizes the overall volume.

The above-said is only the preferred embodiment of the present application, and it is not intended to limit the present application, any modifications, equivalents and improvements made within the spirit and principles of the present application should be included within the protection scope of the present application.