TWM542580U - Wheel drive means - Google Patents

Description

Wheel drive

The present invention relates to a wheel, and more particularly to a wheel drive for mounting on the bottom of a vehicle.

The wheels of the vehicle will have various forms depending on the application field. Generally, the wheel mainly includes a hollow ring, a tire mounted on the periphery of the wheel, and one wheel mounted at the center of the wheel for one axle. The hub, and a plurality of spokes connecting the hub with the rim. In use, the axle is driven to drive the rim and the tire to rotate via the hub and the spokes.

Therefore, in order to drive the rotation of the rim, the wheel must be installed in the rim, and the wheel hub and the spokes are installed, but this causes troubles in assembly and the shape is not creative. Therefore, the present invention provides a wheel drive device that is innovative in construction and easy to assemble for consumers to choose.

Accordingly, it is an object of the present invention to provide a wheel drive that is at least capable of overcoming the disadvantages of the prior art.

Thus, the novel wheel drive device includes a wheel unit and a drive unit. The wheel unit includes a fixed rim that is annular around a central axis, a moving rim corresponding to the periphery of the fixed rim, and a plurality of rolling scrolls that are disposed between the fixed rim and the moving rim And a tire disposed outside the moving wheel. The driving unit drives the moving rim of the wheel unit together with the tire to rotate relative to the fixed rim.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to Figures 1, 2 and 3, a first embodiment of the wheel drive device of the present invention is mounted on the bottom of a vehicle (not shown) and can be driven by a power source (not shown). Rolling on a ground 1 walks. The wheel drive device comprises a wheel unit 2, a fixed unit 3, and a drive unit 4.

The wheel unit 2 includes a fixed rim 22 which is annular around a central axis 21, a movable rim 23 corresponding to the periphery of the fixed rim 22, and a plurality of rollers rotatably disposed on the fixed rim 22 and A rolling member 24 between the moving rim 23 and a tire 25 disposed outside the moving rim 23. By the arrangement of the rolling members 24, the moving rim 23 can be smoothly rotated relative to the fixed rim 22. Each of the rolling members 24 of the first embodiment is a ball, and of course may be a roller in design.

The fixing unit 3 is mounted on the vehicle and includes a connecting member 31 protruding from the fixed rim 22 toward the central axis 21, a fixing frame 32 for pivoting the driving unit 4, and a plurality of The connecting member 31 is connected to the fixing member 33 of the fixing frame 32. The fixing frame 32 has two side walls 321 spaced apart from each other on the left and right sides of the wheel unit 2, a first connecting wall 322 connecting the side walls 321 and located outside the wheel unit 2, and a connecting side wall 321 a second connecting wall 323 between the wheel unit 2 and the first connecting wall 322, and a direction from one of the side walls 321 protruding toward the central axis 21 and abutting the connecting member 31 The convex wall 324. Each of the fixing members 33 is a bolt for locking the connecting member 31 and the protruding wall 324, and may of course be a screw or a rivet, etc., it should be noted that the number of the fixing members 33 is not limited, in the first In other variations of the embodiment, it may be one.

The driving unit 4 drives the moving wheel rim 23 of the wheel unit 2 together with the tire 25 to rotate relative to the fixed wheel rim 22. The driving unit 4 includes a ring gear 41 corresponding to a side of the moving wheel ring 23, and a bracket. a first shaft 42 on the first connecting wall 322 of the fixing frame 32 and capable of being driven by the power of the power source, a first gear 43 connected to one end of the first shaft 42 and a rotatably a second shaft 44 mounted on the second connecting wall 323 of the fixing frame 32, a second gear 45 connected to one end of the second shaft 44 and meshing with the first gear 43, and a connection At the other end of the second shaft 44, the third gear 46 that drives the ring gear 41 can be engaged. In the first embodiment, the first gear 43, the second gear 45, and the third gear 46 are both a bevel gear. Of course, the design of the driving unit 4 can also be changed as long as the power of the power source can be transmitted to the moving wheel rim 23, so the structure is not limited to the first embodiment.

In use, the power source drives the first shaft 42 , and the first gear 43 is coupled to drive the second gear 45 to interlock the third gear 46 via the second shaft 44 to engage the ring gear. 41. Rotating the moving rim 23 together with the tire 25 relative to the fixed rim 22, as such, the tire 25 can be driven to roll on the ground 1.

Referring to FIG. 4 and FIG. 5, the configuration of the second embodiment of the present invention is substantially the same as that of the first embodiment, except that the structure of the fixing frame 32 of the fixing unit 3 is different, and the driving unit is different. The design of the connection between the first shaft 42 and the second shaft 44 is also different.

The fixing frame 32 has two first side walls 325 spaced apart from each other and adjacent to the outer side of the wheel unit 2, two spaced apart on the left and right sides of the wheel unit 2, and pivotally pivotally connected to the first side walls 325 respectively. a second side wall 326, a first connecting wall 322 connecting the first side walls 325 and located outside the wheel unit 2, and a second connecting side wall 326 connected to the wheel unit 2 and the first connecting wall 322 A second connecting wall 323 between the two, and a convex wall 324 protruding from the one of the second side walls 326 toward the central axis 21 and abutting against the connecting member 31. The second side walls 326 are connected to one of the shock absorbers 5 of the vehicle.

The driving unit 4 is a universal bearing 47 connecting the first shaft 42 and the second shaft 44 instead of the first gear 43 (see FIG. 3) and the second gear of the first embodiment. 45 (see Figure 3). The second embodiment can have a better degree of freedom of movement by the above design.

In summary, the wheel unit 2 of the wheel drive device of the present invention adopts a bearing type double-ring separation design, and the fixed wheel ring 22 is fixed to the fixed unit 3, and the drive unit 4 is used to drive the wheel unit 2 The moving rim 23 rotates relative to the fixed rim 22, so that the tire 25 can be driven to roll on the ground 1, so that the arrangement of the hub and the spoke of the conventional wheel can be omitted, and the structure is simple and novel, and the assembly is convenient and easy. It is indeed possible to achieve the purpose of this new type.

However, the above is only the embodiment of the present invention, and when it is not possible to limit the scope of the present invention, all the simple equivalent changes and modifications according to the scope of the patent application and the contents of the patent specification are still This new patent covers the scope.

1‧‧‧ ground
2‧‧‧ wheel unit
21‧‧‧ center axis
22‧‧‧ fixed rim
23‧‧‧ moving wheel
24‧‧‧Rolling parts
25‧‧‧ tires
3‧‧‧Fixed unit
31‧‧‧Connecting parts
32‧‧‧ Fixing frame
321‧‧‧ side wall
322‧‧‧First Wall
323‧‧‧Second wall
324‧‧‧ convex wall
325‧‧‧First side wall
326‧‧‧second side wall
33‧‧‧Fixed parts
4‧‧‧ drive unit
41‧‧‧ring gear
42‧‧‧First shaft
43‧‧‧First gear
44‧‧‧Second shaft
45‧‧‧second gear
46‧‧‧ Third gear
47‧‧‧ universal bearing
5‧‧‧Shock absorber

Other features and effects of the present invention will be apparent from the following description of the drawings, wherein: Figure 1 is an incomplete cross-sectional side view of a first embodiment of the wheel drive of the present invention; 1 is an enlarged view of an incomplete section of the first embodiment; FIG. 4 is an incomplete cross-sectional side view of a second embodiment of the wheel drive device of the present invention; Fig. 5 is an enlarged plan view showing an incomplete section of the second embodiment.

2‧‧‧ wheel unit

22‧‧‧ fixed rim

23‧‧‧ moving wheel

24‧‧‧Rolling parts

25‧‧‧ tires

3‧‧‧Fixed unit

31‧‧‧Connecting parts

32‧‧‧ Fixing frame

321‧‧‧ side wall

322‧‧‧First Wall

323‧‧‧Second wall

324‧‧‧ convex wall

33‧‧‧Fixed parts

4‧‧‧ drive unit

41‧‧‧ring gear

42‧‧‧First shaft

43‧‧‧First gear

44‧‧‧Second shaft

45‧‧‧second gear

46‧‧‧ Third gear

Claims (7)

A wheel drive device comprising: a wheel unit including a fixed ring rim that is annular around a central axis, a movable rim corresponding to a periphery of the fixed rim, and a plurality of rollable wheels on the fixed rim a rolling member between the moving rim and a tire disposed outside the moving rim; and a driving unit that drives the moving rim of the wheel unit together with the tire to rotate relative to the fixed rim. The wheel drive device of claim 1, further comprising a fixing unit including a fixing bracket for supporting the fixed wheel and pivoting the driving unit. The wheel drive device of claim 2, wherein the fixing unit further comprises a connecting member protruding from the fixed ring to the central axis, and at least one fixing the connecting member to the fixing frame Pieces. The wheel drive device of claim 3, wherein the drive unit comprises a ring gear corresponding to a side of the moving wheel ring, a first shaft that is mounted on the fixed frame and can be powered by the power, and a first shaft a first gear coupled to one end of the first shaft, a second shaft rotatably mounted on the fixed frame, and one end coupled to one end of the second shaft and engaged with the first gear a second gear, and a third gear coupled to the other end of the second shaft and capable of engaging the ring gear. The wheel drive device of claim 3, wherein the drive unit comprises a ring gear corresponding to a side of the moving wheel ring, a first shaft that is mounted on the fixed frame and can be powered by the first shaft, a second shaft rotatably mounted on the fixing frame, a universal bearing connecting the first shaft and the second shaft, and a connecting one end of the second shaft away from the universal bearing And the third gear that drives the ring gear can be engaged. The wheel drive device of claim 4, wherein the holder has two side walls spaced apart from each other on the left and right sides of the wheel unit, and a first one for connecting the side walls and pivoting the first shaft a connecting wall, a second connecting wall connecting the side walls and pivoting the second shaft, and a protrusion protruding from one of the side walls toward the central axis and abutting against the connecting member wall. The wheel drive device of claim 4, wherein the holder has two first side walls spaced apart from each other adjacent to the wheel unit, two spaced apart on the left and right sides of the wheel unit and swingably respectively a second side wall pivotally connected to the first side wall, a first connecting wall connecting the first side walls and located outside the wheel unit, and a second side wall connecting the second side wall and the first unit a second wall between the walls and a convex wall projecting from one of the second side walls toward the central axis and abutting against the connecting member.