Axle fixing plate for omnidirectional wheel

Abstract

The utility model relates to a wheel axle fixing plate for an omnidirectional wheel, which comprises a wheel axle fixing plate body, the plate tail of the wheel axle fixing plate body is provided with a matching part which is used for being matched with the peripheral side part of a hub, and the inner side surface and the outer side surface of the matching part are respectively provided with at least one positioning convex part which is used for being matched with a positioning hole at the end part of the hub. The matching part is provided with a connecting through hole through which a connecting piece for locking the end part of the hub and the matching part can penetrate; the inner side face and the outer side face of the matching part are each provided with three positioning protruding parts, and the three positioning protruding parts are distributed in a triangular shape. The wheel axle fixing plate is reasonable in structure, the positioning convex part is arranged at the matching part of the plate tail of the wheel axle fixing plate, three-point positioning with the hub is conveniently formed, the wheel axle fixing plate is connected with the end part of the hub through the connecting piece, the connection is firm, the wheel axle fixing plate can be detachably connected with the hub, the wheel axle fixing plate is convenient to assemble and disassemble, welding is not needed during assembly, and the production cost is reduced. The processing is convenient.

Description

Technical field:

[0002] The utility model relates to a wheel axle fixing plate for an omnidirectional wheel. Background technology:

[0004] An omnidirectional wheel is a wheel that can move in different directions. It can roll axially like a normal wheel, or move laterally using the rolling elements on the wheel, achieving two degrees of freedom of movement: axial rotation and lateral movement. It has the advantages of flexible movement and small turning radius. It is widely used in robots, carts, small vehicles, electric wheelchairs, etc. to achieve small radius turning.

[0005] Chinese patent publication number CN111251781A discloses a welding shaft for a universal wheel, a wheel assembly and a universal wheel (the universal wheel is essentially an omnidirectional wheel), the wheel axle fixing plate of the universal wheel is welded and fixed to the large wheel welding shaft and the small wheel welding shaft, the large wheel is mounted on the large wheel welding shaft, and the small wheel is mounted on the small wheel mounting shaft, and the two sides of the wheel axle fixing plate are symmetrically provided with snap-fit ​​grooves near the plate tail, and the snap-fit ​​grooves are snap-fitted with the outer fixing plate and the inner fixing plate of the universal wheel. However, in actual use, in order to avoid the shaking of the wheel axle fixing plate and the inner and outer fixing plates, the wheel axle fixing plate is usually welded and fixed at the snap-fitting position with the inner and outer fixing plates, which not only increases the workload of assembly, but also the wheel axle fixing plate is fixed with the inner and outer fixing plates to form an inseparable whole, which makes it impossible to maintain and replace a single wheel set structure (composed of the wheel axle fixing plate and the large wheel and the small wheel). For this reason, it is necessary to improve the wheel axle fixing plate in the above patent to solve the above technical problems, and this case is thus born. Utility model content:

[0007] The utility model makes improvements on the problems existing in the above-mentioned prior art, that is, the technical problem to be solved by the utility model is to provide a wheel axle fixing plate for an omnidirectional wheel.

[0008] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: an axle fixing plate for an omnidirectional wheel, comprising an axle fixing plate body, the plate tail of the axle fixing plate body is provided with a matching portion for matching with the peripheral side portion of the wheel hub, the inner side surface and the outer side surface of the matching portion are both provided with at least one positioning protrusion for matching with the positioning hole at the end of the wheel hub, and the matching portion is provided with a connecting through hole for passing a connecting piece to lock the end of the wheel hub with the matching portion.

[0009] Furthermore, the inner side surface and the outer side surface of the matching portion are both provided with three positioning protrusions, and the three positioning protrusions are distributed in a triangular shape.

[0010] Furthermore, the connecting through hole is located on the inner side of the three positioning protrusions.

[0011] Furthermore, an arc-shaped matching surface for fitting with the peripheral side of the wheel hub is provided at one end of the matching portion away from the plate tail of the wheel axle fixing plate body.

[0012] Furthermore, a limiting protrusion is provided in the middle of the arc-shaped mating surface for being inserted into a limiting slot on the peripheral side of the wheel hub.

[0013] Furthermore, one of the positioning protrusions is arranged on the limiting protrusion.

[0014] Furthermore, the curvature of the arc-shaped mating surface is consistent with the curvature of the outer peripheral side of the hub.

[0015] Furthermore, the limiting protrusion, the matching portion and the wheel axle fixing plate body are integrally formed.

[0016] Furthermore, the connecting through hole is located in the middle of the matching portion and penetrates along the inner and outer directions.

[0017] Furthermore, the positioning protrusion is circular in shape.

[0018] Compared with the prior art, the utility model has the following effects: the utility model has a reasonable structural design, and a positioning protrusion is provided at the mating part of the tail of the wheel axle fixing plate to facilitate three-point positioning with the wheel hub, and then the wheel axle fixing plate is connected to the end of the wheel hub through a connecting piece, and the connection is firm, and the wheel axle fixing plate and the wheel hub can be detachably connected, which is not only convenient for assembly and disassembly, but also does not require welding during assembly, and is convenient for processing. Description of the drawings:

[0020] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the utility model;

[0021] Figure 2 It is a schematic diagram of the exploded state when the embodiment of the utility model is matched with the wheel hub;

[0022] Figure 3 It is a schematic diagram of the structure when the upper wheel assembly is installed in the embodiment of the utility model;

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure of the omnidirectional wheel in the embodiment of the utility model;

[0024] Figure 5 1 is a schematic diagram of the main structure of the omnidirectional wheel in an embodiment of the utility model (the inner fixing plate is omitted);

[0025] Figure 6 yes Figure 5 A is an enlarged schematic diagram. Specific implementation method:

[0027] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0028] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0029] like Figures 1 to 6 As shown, the utility model is an omnidirectional wheel axle fixing plate, which is improved on the basis of a welding shaft for a universal wheel and its wheel assembly and an axle fixing plate in a universal wheel disclosed in Chinese Patent Publication No. CN111251781A, so as to overcome the problems of inconvenient installation and disassembly and low assembly efficiency of the axle fixing plate in the above patent when applied to the omnidirectional wheel. Specifically, it comprises an axle fixing plate body 1 with a large wheel welding shaft 17 and a small wheel welding shaft 5 on both sides of the plate surface, the large wheel welding shaft 17 and the small wheel welding shaft 5 are used to install the large wheel 18 and the small wheel 19 respectively, the plate tail of the axle fixing plate body 1 is provided with a matching portion 2 for matching with the peripheral side portion of the wheel hub 6, the inner side and the outer side of the matching portion 2 are both provided with three positioning protrusions 3 for matching with the positioning holes 12 at the end of the wheel hub 6, the three positioning protrusions 3 are distributed in a triangular shape, and the matching portion 2 is provided with a connecting through hole 4 through which a connecting piece 7 for locking the end of the wheel hub 6 with the matching portion 2 passes. By arranging a positioning protrusion at the matching part of the rear end of the wheel axle fixing plate, it is convenient to form a three-point positioning with the inner and outer ends of the wheel hub, and then the wheel axle fixing plate is connected to the inner and outer ends of the wheel hub via a connecting piece. The connection is firm, and the wheel axle fixing plate and the wheel hub can be detachably connected, that is, the wheel set structure of the omnidirectional wheel is detachable, which is not only convenient for assembly and disassembly, but also does not require welding during assembly, and is convenient for processing.

[0030] In this embodiment, the connecting through holes 4 are located inside the three positioning protrusions 3 .

[0031] In this embodiment, the wheel hub 6 includes a wheel axle drive connector 8, and a shock absorber 9 is provided around the outer peripheral side of the wheel axle drive connector 8, and the outer peripheral side of the shock absorber 9 is used to cooperate with the matching portion 3. Further, the inner and outer end surfaces of the wheel axle drive connector 8 are respectively provided with an inner fixing plate 10 and an outer fixing plate 11, the inner fixing plate 10 is the inner end of the wheel hub, and the outer fixing plate 11 is the outer end of the wheel hub, and the inner fixing plate 10 and the outer fixing plate 11 are provided with three triangularly distributed positioning holes 12 at positions corresponding to the positions of the wheel axle fixing plates, and at the same time, the inner fixing plate 10 and the outer fixing plate 11 are also provided with clearance holes 13 at positions corresponding to the positions of the connecting through holes 4 to facilitate the passing of the connector. It should be noted that the structure of the wheel axle drive connector is the same as that of the wheel axle drive connector in Chinese Patent Publication No. CN111251781A, and its specific structure will not be repeated here.

[0032] In this embodiment, the shock absorbing member is made of elastic material, such as rubber.

[0033] In this embodiment, the connecting member 7 includes matching connecting bolts and locking nuts. The connecting bolts pass through the clearance holes on the inner and outer fixing plates and the connecting through holes on the matching part, and are then threadedly connected with the locking nuts. The matching part, the inner fixing plate, and the outer fixing plate are locked and fixed by using the connecting bolts and locking nuts.

[0034] In this embodiment, an end of the matching portion 2 away from the rear of the wheel axle fixing plate body 1 is provided with an arc-shaped matching surface 14 for fitting with the 9 peripheral side surfaces of the shock absorbing member on the peripheral side of the wheel hub 6 .

[0035] In this embodiment, a limiting convex portion 15 is provided in the middle of the arc-shaped mating surface 14, and the limiting convex portion 15 is used to be inserted into the limiting slot 16 on the side of the hub shock absorber 9. The limiting convex portion cooperates with the limiting slot to achieve limiting, effectively preventing the wheel axle fixing plate from shaking.

[0036] In this embodiment, one of the positioning protrusions 3 is disposed on the limiting protrusion 15 .

[0037] In this embodiment, the curvature of the arc-shaped mating surface 14 is consistent with the curvature of the outer peripheral side of the shock absorbing member 9 of the wheel hub, so as to improve the fitting effect between the two.

[0038] In this embodiment, the limiting protrusion, the matching portion and the wheel axle fixing plate body are integrally formed.

[0039] In this embodiment, the length direction of the matching portion 2 is consistent with the plate width direction along the wheel axle fixing plate body 1, and the length of the matching portion is smaller than the plate width of the wheel axle fixing plate body, that is, the inner and outer side surfaces of the matching portion are not flush with the two side surfaces in the plate width direction of the wheel axle fixing plate body. When the positioning holes on the inner fixing plate and the outer fixing plate are matched with the positioning protrusions on the matching portion, the positioning protrusions extend into the positioning holes. At this time, the inner and outer fixing plates are flush with the side surfaces in the plate width direction of the wheel axle fixing body.

[0040] In this embodiment, the connecting through hole 4 is located in the middle of the matching portion 2 and penetrates along the inner and outer directions.

[0041] In this embodiment, the cross section of the positioning protrusion 3 is circular. It should be noted that the cross section of the positioning protrusion may also be other shapes, such as rectangular, square, triangular, etc.

[0042] In this embodiment, when in use, the arc-shaped mating surface 14 of the mating portion 2 is fitted with the outer peripheral side surface of the shock absorber 9 on the peripheral side of the wheel hub, and the limiting protrusion 15 is inserted into the limiting slot 16 on the peripheral side surface of the shock absorber 9, and then the inner fixing plate 10 and the outer fixing plate 11 are covered, and the three positioning holes on the inner fixing plate 10 and the outer fixing plate 11 are matched with the positioning protrusion 3 on the mating portion 2 to achieve positioning, and then the inner fixing plate 10, the mating portion 2 and the outer fixing plate 11 are locked and fixed by the connecting member 7.

[0043] It should be noted that the remaining undescribed structures of the above-mentioned axle fixing plate are the same as the axle fixing plate structure disclosed in Chinese Patent Publication No. CN111251781A, for example, shock-absorbing holes are also provided, etc., but the axle fixing plate in this embodiment no longer has structures such as snap-in grooves and give-way grooves, and will not be repeated here.

[0044] If the present invention discloses or involves components or structures that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connection using bolts or screws), and can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integrated structure (for example, manufactured by one-piece molding using a casting process) (except where it is obviously impossible to use an one-piece molding process).

[0045] In addition, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in the above utility model include states or shapes that are approximate, similar or close thereto.

[0046] Any component provided by the utility model can be assembled from multiple separate components, or can be a separate component manufactured by an integrated forming process.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the utility model, which should be included in the scope of the technical solution for protection of the utility model.

Claims

1. An axle fixing plate for an omnidirectional wheel, comprising an axle fixing plate body, characterized in that: The tail of the wheel axle fixing plate body is provided with a matching portion for matching with the peripheral side portion of the wheel hub, and the inner and outer sides of the matching portion are both provided with at least one positioning protrusion for matching with the positioning hole at the end of the wheel hub, and the matching portion is provided with a connecting through hole for passing a connecting piece to lock the end of the wheel hub with the matching portion.

2. The axle fixing plate for an omnidirectional wheel according to claim 1, characterized in that: The inner side surface and the outer side surface of the matching portion are both provided with three positioning protrusions, and the three positioning protrusions are distributed in a triangle.

3. The axle fixing plate for an omnidirectional wheel according to claim 2, characterized in that: The connecting through hole is located at the inner side of the three positioning protrusions.

4. The axle fixing plate for an omnidirectional wheel according to claim 2, characterized in that: An arc-shaped matching surface for fitting with the peripheral side of the wheel hub is arranged at one end of the matching portion away from the plate tail of the wheel axle fixing plate body.

5. The axle fixing plate for an omnidirectional wheel according to claim 4, characterized in that: A limiting convex portion for inserting into a limiting slot on the peripheral side of the wheel hub is arranged in the middle of the arc-shaped matching surface.

6. The axle fixing plate for an omnidirectional wheel according to claim 5, characterized in that: One of the positioning protrusions is arranged on the limiting protrusion.

7. The axle fixing plate for an omnidirectional wheel according to claim 4, characterized in that: The curvature of the arc-shaped matching surface is consistent with the curvature of the outer peripheral side of the hub.

8. The axle fixing plate for an omnidirectional wheel according to claim 5, characterized in that: The limiting protrusion, the matching portion and the axle fixing plate body are integrally formed.

9. The axle fixing plate for an omnidirectional wheel according to claim 1, characterized in that: The connecting through hole is located in the middle of the matching portion and penetrates along the inner and outer directions.

10. The axle fixing plate for an omnidirectional wheel according to claim 1, 2 or 3, characterized in that: The positioning protrusion is circular.

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