TW201706149A - Caster device comprises a connection seat, a wheel seat, a connection shaft, a first liner, a second liner, and a wheel pivotally disposed at the wheel seat for the advantages of stability, robustness, and durability - Google Patents

Abstract

A caster device is disclosed, which comprises a connection seat, a wheel seat, a connection shaft, a first liner, a second liner, and a wheel pivotally disposed at the wheel seat. The wheel seat defines a penetration space. The penetration space has an opening facing the connection seat. The connection shaft penetrates into the connection seat and the wheel seat, and comprises a wider head and a neck extending from the head toward the opening. The first liner is located between the head of connection shaft and the position-limiting surface. The second liner is located between the connection shaft and the surrounding surface. Also, the second liner divides the penetration space into a first region for the neck to penetrate, and a wider second region for the head to penetrate. The caster device has the advantages of stability, robustness, and durability.

Description

Caster device

The present invention relates to a transport mobile device, and more particularly to a caster device.

Referring to Figure 1, a conventional caster device is adapted for use with a luggage case (not shown). The caster device includes a connecting base 11 connected to the bottom of the luggage case, a wheel base 12 spaced apart from the connecting seat 11, and a connecting shaft 13 respectively disposed at the two ends of the connecting seat 11 and the wheel base 12 And a wheel 14 pivoted in the wheel base 12. The connecting seat 11 has a through hole 111 through which the connecting shaft 13 is passed, and can be screwed to lock the luggage with the luggage box. The wheel base 12 defines a through space 121 recessed from top to bottom, and a limiting wall 122 located in the through space 121 and projecting inward. The limiting wall 122 has an extending surface 123 extending up and down, and two inclined surfaces 124 respectively extending outward from the extending surface 123. The connecting shaft 13 has a first shaft body 131 and a second shaft body 132 connected to each other. The first shaft body 131 is riveted to the connecting seat 11 . The second shaft body 132 is disposed in the wearing space 121 and has a head portion 133 and a body portion 134 spaced apart from each other, and a neck portion 135 connected between the head portion 133 and the body portion 134. . The head portion 133 cooperates with the body portion 134 and the neck portion 135 to define a limiting slot 136 that is recessed from the outside to the inside. The neck 135 has a width that is smaller than the head 133. The limiting slot 136 can be engaged by the limiting wall 122.

The connection of the connecting base 11 and the wheel base 12 by the connecting shaft 13 allows the wheel base 12 to rotate relative to the connecting seat 11. The first shaft body 131 is riveted to the connecting seat 11 . The head portion 133 of the second shaft body 132 is limited by the inclined surface 124 located below, and the connecting seat 11 can be prevented from being separated from the wheel seat 12 . However, such a limit design is not sufficiently stable, and the head 133 is still easy to slide out of the inclined surface 124, which needs to be improved.

It is an object of the present invention to provide a more robust caster device.

The caster device is adapted to be mounted to a body and includes a base, a wheel base, a connecting shaft, a first bushing, a second bushing, and a wheel.

The connector is connected to the body. The wheel base is spaced from the connecting seat and includes a surrounding surface and a limiting surface connecting the surrounding surface. The surrounding surface cooperates with the limiting surface to define a wearing space. The opening space has an opening facing the connecting seat and opposite to the limiting surface. The connecting shaft is disposed in the connecting seat and the wheel seat, and includes a head spaced apart from the limiting surface, and a neck extending from the head toward the opening. The width of the head is greater than the neck. The first bushing is located between the head of the connecting shaft and the limiting surface. The second bushing is sleeved on the connecting shaft and located between the connecting shaft and the surrounding surface. The second bushing separates the opening space from a first region through which the neck is passed. And cooperate with the first bushing to partition the wearing space from a second zone for the head to pass through. The second zone is wider than the first zone. The wheel is pivoted to the wheel base and rotatable relative to the wheel base.

The effect of the caster device is that the wider head of the connecting shaft is located in the second zone and cannot be moved from the second zone to the first zone due to the limited width, and the separation of the connecting shaft can be reliably avoided. The situation occurs to achieve the robust design of the present invention.

Referring to Figures 2, 3 and 4, an embodiment of the caster assembly of the present invention is adapted to be mounted to a body (not shown). The body can be, for example, a trunk, but not limited to the trunk, and can be used on other items requiring the present embodiment. The embodiment includes a connecting base 2 connected to the body, a wheel base 3 spaced apart from the connecting seat 2, and a connecting shaft 4 disposed in the connecting base 2 and the wheel base 3, respectively disposed on the base A first bushing 5 and a second bushing 6 in the wheel base 3, and a wheel 7 pivoted to the wheel base 3 and rotatable relative to the wheel base 3.

The connector 2 can be coupled to the body screw by a screw. Since the connector 2 is not the focus of the present invention, the description thereof is omitted here.

The wheel base 3 includes a peripheral surface 31 that is circular in cross section, and a limiting surface 32 that is connected to the surrounding surface 31 and that is annular. The surrounding surface 31 cooperates with the limiting surface 32 to define a cylindrical through space 33. The insertion space 33 has an opening 331 which is oriented toward the connecting seat 2 and opposite to the limiting surface 32 and which is circular. The surrounding surface 31 also defines a limiting groove 34 which is connected to the upper end portion of the wearing space 33 and has a circular cross section. The limiting groove 34 protrudes radially outward from the wearing space 33. The wheel base 3 also defines a stripping passage 35 that communicates with the passage space 33 and penetrates therethrough. The mold release passage 35 is a structure formed when the wheel base 3 is demolded.

The connecting shaft 4 includes a first shaft body 41 that is disposed in the through space 33, a second shaft body 42 that is disposed in the connecting base 2, and a first shaft body 41 and the first shaft body 41. The disc body 43 is connected between the two shaft bodies 42. The first shaft body 41 includes a head portion 411 located in the wearing space 33 and spaced apart from the limiting surface 32, and a neck portion 412 extending from the head portion 411 to the opening 331 of the wearing space 33. a shoulder portion 413 which gradually expands from the neck portion 412 toward the opening 331, and a shaft portion 414 which is connected between the shoulder portion 413 and the connecting plate body 43. The head 411 and the neck 412 are substantially dome-shaped, and the width of the head 411 is greater than the neck 412. The neck portion 412 and the shaft portion 414 are cylindrical. The second shaft body 42 is also a cylindrical body and has a rivet portion 421 that is riveted to the connecting seat 2. The connecting disc body 43 has a width larger than the first shaft body 41 and the second shaft body 42 and is located between the connecting seat 2 and the wheel base 3.

The first bushing 5 is located between the head portion 411 of the connecting shaft 4 and the limiting surface 32, and includes a wide sleeve portion 51 abutting the limiting surface 32, and a wide sleeve portion 51 The narrow portion 52 of the opening 331 extends. The wide sleeve portion 51 and the narrow sleeve portion 52 are respectively formed in a disk shape. The narrow sleeve portion 52 has a width smaller than the wide sleeve portion 51 and is located at the center of the wide sleeve portion 51.

The second bushing 6 is sleeved on the first shaft body 41 of the connecting shaft 4 and located between the first shaft body 41 and the surrounding surface 31. The second bushing 6 includes a sleeve wall 61 having an annular cross section, a neck wall 62 located on the inner surface of the sleeve wall 61 and having an annular cross section, and an outer surface of the sleeve wall 61 having a circular cross section. Limit wall 63.

The sleeve wall 61 is substantially a hollow cylinder and has a first wall portion 611 abutting the wide sleeve portion 51 of the first bushing 5, and a first portion extending from the first wall portion 611 to the opening 331. Two wall portion 612. The first wall portion 611 surrounds the periphery of the narrow sleeve portion 52 of the first bushing 5.

The neck wall 62 extends radially inwardly from the sleeve wall 61 and is located between the first wall portion 611 and the second wall portion 612. The neck wall 62 has a parallel surface 621 located inside the sleeve wall 61 and parallel to the first wall portion 611 and the second wall portion 612 of the sleeve wall 61, and a parallel surface 621 facing the opening 331 and The inward outer diameter extends and connects the inclined surface 622 of the second wall portion 612, and a vertical surface 623 perpendicularly connected to the first wall portion 611 and the parallel surface 621.

The neck wall 62 partitions the wearing space 33 from a first region 332 through which the neck portion 412 of the connecting shaft 4 passes. The neck wall 62 also cooperates with the first wall portion 611 and the narrow sleeve portion 52 of the first bushing 5 to separate the through space 33 from a second region 333. The width of the second zone 333 is greater than the first zone 332 and is provided for the head 411 of the connecting shaft 4.

The limiting wall 63 protrudes radially outward from the second wall portion 612 and is located in the limiting slot 34 of the wheel base 3 and can prevent the second bushing 6 from being disengaged from the wheel base 3.

In this embodiment, the head 411 is limited by the neck wall 62 of the second bushing 6 and cannot be moved to the first zone 332 because the head 411 is wider than the first zone 332. . In this embodiment, the vertical surface 623 is used to limit the head portion 411 without the limitation that the head portion 411 is out of the vertical surface 623, and the connecting shaft 4 is ensured not to be separated from the second bushing 6. The invention achieves the purpose of stability and durability.

Referring to FIG. 3, FIG. 4 and FIG. 5, the manufacturing method of the embodiment is as follows: the connecting shaft 4 that has not been riveted by the riveting portion 421 is inserted into the connecting base 2 from bottom to top, and the riveting portion is tapped. 421, the connecting shaft 4 is riveted to the connecting seat 2. Next, the first bushing 5 and the second bushing 6 are placed in the mold of the wheel base 3, and the first bushing 5 is abutted by a rod (not shown) to make the first bushing The sleeve 5 does abut against the second bushing 6. Then, the plastic is poured into the mold of the wheel base 3, the rod is extracted and demolded (the mold release passage 35 is formed), so that the first bushing 5 and the second bushing 6 can be coated thereon. In the wheel base 3. Finally, the connecting shaft 4 which is riveted to the connecting seat 2 is inserted into the second bushing 6, that is, the assembly is completed. The second bushing 6 is made of a plastic material and has elasticity and can be slightly deformed. The second bushing 6 has the inclined surface 622, so that the head portion 411 of the connecting shaft 4 can be slipped to the second region 333.

The design of the head portion 411 of the connecting shaft 4 by the right angle formed by the vertical surface 623 is quite stable, but the design of the wheel base 3 integrally formed as in the prior art is quite difficult to manufacture. It is not easy that after the vertical surface 623 is formed, the workpiece is not easily ejected, and there is a problem that it is difficult to demold. The ingenuity of this embodiment is that the first bushing 5 and the second bushing 6 are separately manufactured, and the wheel bushing 3 is wrapped around the first bushing 5 and the second bushing 6 to form the present embodiment. The card embedded structure. The first bushing 5 and the second bushing 6 are relatively simple to manufacture, and the covering technique is not difficult, and the problem of difficulty in demoulding can be justly avoided, which is advantageous for production and manufacture.

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, and the simple equivalent changes and modifications made by the scope of the patent application and the patent specification of the present invention are It is still within the scope of the invention patent.

2‧‧‧Connecting seat
3‧‧·wheel seat
31‧‧‧Face
32‧‧‧Limited surface
33‧‧‧With space
331‧‧‧ openings
332‧‧‧First District
333‧‧‧Second District
34‧‧‧ Limit slot
35‧‧‧Mold release channel
4‧‧‧Connected shaft
41‧‧‧First axle
411‧‧‧ head
412‧‧‧ neck
413‧‧‧ Shoulder
414‧‧‧Axis
42‧‧‧Second shaft
421‧‧‧Riveting
43‧‧‧Connected disk
5‧‧‧First bushing
51‧‧‧ Wide Department
52‧‧‧Narrow section
6‧‧‧Second bushing
61‧‧‧ Set wall
611‧‧‧First wall
612‧‧‧ second wall
62‧‧‧ neck wall
621‧‧‧ parallel faces
622‧‧‧ sloped surface
623‧‧‧Vertical
63‧‧‧Limited wall
7‧‧‧ Wheels

Other features and advantages of the present invention will be apparent from the embodiments of the present invention, wherein: Figure 1 is a cross-sectional view of a conventional caster device; Figure 2 is a cross-sectional view of one embodiment of the caster device of the present invention Figure 3 is an assembled view of a connecting seat and a connecting shaft of the embodiment; Figure 4 is a schematic view showing the assembly of a first bushing and a second bushing and a wheel base of the embodiment; and Figure 5 is This embodiment utilizes the connecting shaft to assemble an assembly of the connecting seat and the wheel base.

2‧‧‧Connecting seat

3‧‧·wheel seat

31‧‧‧Face

32‧‧‧Limited surface

33‧‧‧With space

331‧‧‧ openings

332‧‧‧First District

333‧‧‧Second District

34‧‧‧ Limit slot

35‧‧‧Mold release channel

4‧‧‧Connected shaft

41‧‧‧First axle

411‧‧‧ head

412‧‧‧ neck

413‧‧‧ Shoulder

414‧‧‧Axis

42‧‧‧Second shaft

421‧‧‧Riveting

43‧‧‧Connected disk

5‧‧‧First bushing

51‧‧‧ Wide Department

52‧‧‧Narrow section

6‧‧‧Second bushing

623‧‧‧Vertical

63‧‧‧Limited wall

7‧‧‧ Wheels

Claims (6)

A caster device adapted to be mounted on a body and comprising: a connecting base connecting the body; a wheel seat spaced from the connecting seat and including a surrounding surface, and a limiting surface connecting the surrounding surface The surrounding surface cooperates with the limiting surface to define a wearing space, the wearing space has an opening facing the connecting seat and opposite to the limiting surface; a connecting shaft is disposed on the connecting seat and the wheel seat And including a head spaced apart from the limiting surface, and a neck extending from the head toward the opening, the head having a width greater than the neck; a first bushing located at the connecting shaft Between the head and the limiting surface; a second bushing sleeved on the connecting shaft and located between the connecting shaft and the surrounding surface, the second bushing separating the opening space for the a first region through which the neck is disposed, and cooperates with the first bushing to partition the wearing space from a second region for the head to be penetrated, the second region being wider than the first region; A wheel is pivoted to the wheel base and rotatable relative to the wheel seat. The caster device of claim 1, wherein the first bushing includes a wide sleeve portion abutting the limiting surface, and a narrow sleeve portion extending from the wide sleeve portion toward the opening, the narrow sleeve portion The width is smaller than the wide sleeve. The caster device of claim 2, wherein the second bushing comprises a sleeve wall having an annular cross section, and a neck wall extending inwardly from the inner surface of the sleeve wall and having an annular cross section, the sleeve wall having a first wall portion abutting the wide sleeve portion of the first bushing, and a second wall portion extending from the first wall portion toward the opening, the neck wall being located at the first wall portion and the second portion The first zone is defined between the walls and cooperates with the first wall and the narrow sleeve to define the second zone. The caster device according to claim 3, wherein the neck wall has a parallel surface on the inner side and parallel to the first wall portion and the second wall portion, and one of the parallel faces faces the opening and extends from the inside to the outside And connecting the inclined surface of the second wall portion and a vertical surface vertically connected between the first wall portion and the parallel surface. The caster device of claim 3, wherein the surrounding surface further defines a limiting slot that communicates with the through space and has an annular cross section, and the second bushing further has a second wall portion protruding outwardly The limiting wall is formed in an annular shape, and the limiting wall is located in the limiting slot, and the second bushing can be prevented from being disengaged from the wheel seat. The caster device of claim 1, wherein the connecting shaft includes a first shaft body that is disposed in the through space, a second shaft body that is disposed in the connecting seat, and a second shaft body coupled to the first shaft body a connecting disc body between the shaft body and the second shaft body, the connecting disc body having a width larger than the first shaft body and the second shaft body, the first shaft body having the head portion and the neck portion and a The shoulder portion of the neck gradually expanding toward the opening, and a shaft portion connected between the shoulder portion and the connecting plate body.