TWI714501B - Caster structure - Google Patents

Abstract

A caster structure of the present invention includes: a set of sockets, a rotating seat, a shaft, a wheel set, a shock absorber, an upper rotating device, a lower rotating device and a brake device, the rotating seat is arranged on the set of sockets On the lower side, the rotating seat assembly is provided with a first pivot rod and a second pivot rod, the shaft member passes through the assembly seat and is pivotally connected to the rotating seat, the wheel set is arranged on the lower side of the rotating seat, and the wheel The assembly is provided with a wheel seat and a roller, the wheel seat is pivotally connected by the first pivot rod, the shock absorber is arranged on the rotating seat and the wheel seat, and includes a movable rod, a spring and a screw member, The upper rotating device is arranged between the assembly seat and the rotating seat, the lower rotating device is arranged on the lower side of the rotating seat, and the braking device is arranged between the rotating seat and the wheel set; The anti-vibration effect can reduce the vibration of the load when moving, can ensure the smooth rotation of the casters, and the brake device has a simple structure and few components.

Description

Caster structure

The invention relates to a caster, especially a caster structure with shock-absorbing function.

By the way, with the rise of the industrial revolution in modern times, more and more equipment needs to be moved, and the application of casters has become more and more extensive. All walks of life are almost inseparable from casters. The casters are installed in equipment (such as carts, The bottom of the transport trolley, etc., by the casters contacting the ground, the equipment can be moved so that it can be moved easily and effortlessly.

Generally, casters are usually not equipped with shock-absorbing components. Therefore, if the mobile device encounters a bumpy ground, it will not only cause the carried objects to be shaken, but also cause the carried objects to fall, which can easily cause damage to the objects.

Therefore, some industry has developed a conventional caster with shock-absorbing function. A wheel seat is arranged at the lower end of a set of sockets, the wheel seat is pivoted with a wheel body, and the center of the set of sockets is provided with a spring groove for installing a spring. , The shock-absorbing effect is achieved by the spring. However, due to space constraints, the size and specifications of the installed spring are limited, so that the outer diameter and wire diameter of the spring must be relatively reduced in order to be installed in the spring groove smoothly. Therefore, the spring force is often insufficient. Reduce the shock-absorbing effect that can be provided, and even the effect of shock-absorbing cannot be provided in a timely manner due to the excessive compression of the spring. In addition, when the caster is a movable caster that can rotate 360 degrees, it is often caused by gravity exceeding the load of the assembly seat and the wheel seat. It causes deformation, causing the casters to not rotate smoothly and cannot change directions smoothly. Furthermore, the brake structure is complicated and there are many components. For the manufacturer, too many components will increase the manufacturing cost and the assembly will be relatively time-consuming. For consumers, too many components will not only cause components to be easily damaged and have a short service life, but also increase subsequent maintenance and replacement costs.

In view of the above-mentioned shortcomings of the conventional casters with shock-absorbing function, the inventor of the present invention is based on the idea of thinking and creation. After many discussions, sample tests, and many modifications and improvements, the present invention is introduced.

The present invention provides a caster structure, including: a set of sockets, a through hole is arranged in the center; a rotating seat, arranged on the lower side of the set of sockets, the rotating seat is provided with a top plate and downward from opposite sides of the top plate The two side plates are extended, the top plate is provided with a pivot hole, a first pivot rod and a second pivot rod are fixed between the two side plates; a shaft member penetrates the through hole of the assembly base and the rotation The pivot hole of the seat is pivoted so that the rotating base is combined with the assembly base, and the rotating base can rotate relative to the assembly base; a wheel set is arranged on the lower side of the rotating base, and the wheel set is provided with a wheel Seat and a roller pivoted on the wheel seat, the wheel seat is provided with a pivot hole, and the pivot hole of the wheel seat allows the first pivot rod to pass through and pivot, so that the wheel can pass through the first pivot The rod is pivoted with respect to the rotating seat, and one end of the wheel seat corresponds to the second pivot rod with a through part; and a shock-absorbing device, which includes a movable rod, a spring, and a screw One end of the movable rod is provided with a pivot hole, and the opposite end is provided with an external thread section. The pivot hole of the movable rod allows the second pivot rod to pass through and pivot, so that the movable rod can pass through the second pivot rod. The shaft is pivoted, the movable rod penetrates the through part of the wheel base and the spring, and the threaded member and the outer threaded section of the movable rod are screwed together to make the spring spring against the wheel base and the screw. Between the knots, the shock-absorbing device is hung by the second pivot rod to become a suspension-type shock-absorbing system.

The main purpose of the caster structure of the present invention is that the wheel base can pivot relative to the rotating base through the first pivot rod as the axis, and a shock-absorbing device is arranged between the wheel base and the rotating base, so as to have a good The shock-absorbing effect reduces the vibration of the load-bearing items when moving, so as to better protect the load-bearing items.

The following further descriptions are provided in conjunction with the drawings of the preferred embodiments of the present invention, so that those who are familiar with the related technologies of the present invention can implement them based on the statements in this specification.

First of all, please refer to the first to fourth figures. The present invention is a caster structure including: a set of sockets 10, a rotating seat 20, a shaft 30, a wheel set 40, a shock absorber 50, a The upper rotating device 60, the lower rotating device 70 and a braking device 80.

A through hole 11 is provided in the center of the assembly base 10, and a plurality of coupling holes 12 are arranged near the periphery. Through the plurality of coupling holes 12, a plurality of coupling parts can be combined with the bottom of a device to fix the assembly base 10 At the bottom of the device.

The rotating base 20 is disposed on the lower side of the assembly base 10. The rotating base 20 is provided with a top plate 21 and two side plates 22 extending downward from opposite sides of the top plate 21. The top plate 21 is provided with a pivot hole 211. A first pivot rod 23, a second pivot rod 24 and a limit rod 25 are inserted and fixed between the two side plates 22.

The shaft member 30 passes through the through hole 11 of the assembly base 10 and pivotally connects with the pivot hole 211 of the rotating base 20, so that the rotating base 20 is combined with the assembly base 10, and the rotating base 20 can be opposed to each other Rotate on the assembly base 10.

The wheel set 40 is arranged on the lower side of the rotating seat 20. The wheel set 40 is provided with a wheel seat 41 and a roller 42 pivoted on the wheel seat 41. The wheel seat 41 is provided with a pivot hole 411. The wheel seat The pivot hole 411 of 41 allows the first pivot rod 23 to pass through and pivot, so that the wheel set 40 can pivot relative to the rotating base 20 through the first pivot rod 23 as the axis. A through portion 412 is provided below the second pivot rod 24, and a limiting portion 413 is provided at the opposite end. The through portion 412 is a notch in this embodiment.

The shock absorber 50 includes a movable rod 51, a spring 52, a screw member 53 and two washers 54. One end of the movable rod 51 is provided with a pivot hole 511, and the opposite end is provided with an external threaded section 512. The movable rod The pivot hole 511 of 51 allows the second pivot rod 24 to pass through and pivot, so that the movable rod 51 can pivot through the second pivot rod 24, and the movable rod 51 passes through the wheel base 41 The part 412 and the spring 52 are screwed together by the screw member 53 and the outer threaded section 512 of the movable rod 51, so that the spring 52 springs against the wheel base 41 and the screw member 53, the two pads The sheets 54 are respectively cushioned between the wheel base 41 and the spring 52 and between the spring 52 and the screw member 53, and are respectively provided for the movable rod 51 to pass through, so that the shock-absorbing device 50 can pass through the The second pivot rod 24 is hung to become a suspension type suspension system.

The upper rotating device 60 is disposed between the assembly base 10 and the top plate 21 of the rotating base 20. The upper rotating device 60 includes an upper cover 61, a first ball set 62, a second ball set 63, and a first A ring piece 64, a first perforation 611 is provided in the center of the upper cover 61, the first perforation 611 is for the shaft 30 to pass through, the first ball set 62 is composed of a plurality of first balls 621, the first ball The set 62 is arranged in a larger ring shape between the upper cover 61 and the top plate 21 of the rotating seat 20, the second ball set 63 is composed of a plurality of second balls 631, and the second ball set 63 has a smaller ring The ring shape is arranged between the upper cover 61 and the top plate 21 of the rotating seat 20, the diameter of the first ball 621 is larger than the diameter of the second ball 631, and the first ring piece 64 is arranged on the first ball set 62 and Between the second ball group 63.

The lower rotating device 70 is arranged on the underside of the top plate 21 of the rotating seat 20. The lower rotating device 70 includes a lower cover 71, a third ball set 72 and a second ring 73. The lower cover 71 is provided with a The second perforation 711, the second perforation 711 is for the shaft 30 to pass through, the third ball set 72 is composed of a plurality of third balls 721, and the second ball set 72 is disposed on the lower cover 71 and the rotating seat Between the top plates 21 of 20 and the third ball group 72 corresponds to between the first ball group 62 and the second ball group 63.

The brake device 80 is arranged between the rotating seat 20 and the wheel set 40. The brake device 80 includes a connecting member 81, an operating member 82, a linkage member 83 and a brake member 84. The connecting member 81 is connected to At one end of the rotating base 20, a first rod 811 and a second rod 812 are penetrated and fixed on the connecting member 81, an operating plate 821 is provided at one end of the operating member 82, and the opposite end is pivoted with the first rod 811 Then, one end of the linkage member 83 is stacked on the operating member 82, and the opposite end is pivotally connected to the second rod 812. The brake member 84 is provided with a fixed piece 841 and a brake piece is bent and extended from one end of the fixed piece 841 842. The fixing piece 841 is sandwiched between the first rod body 811 and the second rod body 812, and the brake pad 842 is disposed between the linkage 83 and the roller 42.

When in use, the casters of the present invention are installed at the bottom of equipment (such as carts, transport trolleys, etc.). By contacting the casters with the ground, the equipment can be moved so that the equipment can be carried on the equipment, which is convenient for moving and saving effort. , When the casters travel on bumpy ground, as shown in the fifth and sixth figures, the force transmitted from the ground will drive the wheel set 40 relative to the rotating seat 20 with the first pivot 23 as the axis. When the wheel set 40 pivots, the limit part 413 of the wheel seat 41 is blocked by the limit rod 25 of the rotating seat 20 when the wheel set 40 pivots, and the maximum pivot angle of the wheel set 40 is restricted. The pivot of 40 causes the spring 52 of the shock absorber 50 to be compressed and contracted. At the same time, the movable rod 51 of the shock absorber 50 pivots with the second pivot rod 24 as the axis, and follows the wheel seat The penetrating portion 412 of 41 slides, and then the elasticity of the spring 52 causes the spring 52 to expand and return to its original shape, and at the same time drives the wheel set 40 and the movable rod 52 to pivot back to the original position, so as to allow transmission from the ground The force of the shock absorber 50 is absorbed by the shock absorber 50, buffering the vibration from the casters, so that the moved equipment can travel very smoothly, so that the carried objects will not produce too many bumps and vibrations, while protecting the carried objects Effect.

When you want to brake, as shown in the seventh figure, step on the operating plate 821 of the operating member 82 of the brake device 80 to make the operating member 82 pivot about the first lever body 811, and the operating member 82 Toggle the linkage member 83 to pivot around the second rod body 812, and then the linkage member 83 pushes the brake member 84, so that the brake pad 842 of the brake member 84 is elastically deformed downward to resist the pressing The roller 42 of the wheel set 40 achieves the braking function. When the brake is released, the operating plate 821 of the operating member 82 of the brake device 80 is moved upward, so that the brake member 80 is restored to its original shape by the elasticity of the body, and at the same time, the operating member 82 and the linkage member 83 are used by the brake. The elasticity of the piece 80 returns to its original position and the brake is released.

Furthermore, as shown in the eighth and ninth figures, it is another embodiment of the caster structure of this creative. The difference between this another embodiment and the above-mentioned embodiment is that the through portion 412 of the wheel seat 41 of the wheel set 40 is Through holes, two symmetrical reinforcing ribs 414 are provided on both sides of the through portion 412. The shock absorber 50 includes a movable rod 51, a spring 52, a screw member 53, an upper cover 55 and a lower cover 56 One end of the movable rod 51 is provided with a pivot hole 511, and the opposite end is provided with an external threaded section 512. The pivot hole 511 of the movable rod 51 allows the second pivot rod 24 to pass through and pivot, so that the movable rod 51 can pass through The second pivot rod 24 is pivoted as an axis, the movable rod 51 penetrates the through portion 412 of the wheel seat 41 and the spring 52, and the screw member 53 is screwed with the outer threaded section 512 of the movable rod 51 In combination, the spring 52 springs against the wheel base 41 and the screw member 53, the upper cover 55 and the lower cover 56 are respectively cushioned between the wheel base 41 and the spring 52 and the Between the spring 52 and the screw member 53, the movable rod 51 is passed through, and the upper cover 55 is provided with an upper sleeve groove 551 for the upper end of the spring 52 to be sleeved and positioned, and the lower cover 56 is provided with A lower sleeve groove 561 is used for sleeve positioning of the lower end of the spring 52, and the connecting piece 81 of the brake device 8 is integrally formed at one end of the rotating base 20.

From the structure of the above specific embodiment, the following benefits can be obtained:

1. In the caster structure of the present invention, the wheel base 41 can pivot relative to the rotating base 20 through the first pivot rod 23 as the axis, and a shock-absorbing device 50 is arranged between the wheel base 41 and the rotating base 20 , In order to have a good shock-absorbing effect, improve the stability of movement, reduce the vibration of the load when moving, and better protect the load.

2. The caster structure of the present invention is provided with an upper rotating device 60 and a lower rotating device 70, and the third ball set 72 of the lower rotating device 70 corresponds to the first ball set 62 and the second ball set 62 of the upper rotating device 60 Between the ball sets 63, the gravitational load that the set connecting seat 10 and the rotating seat 20 can bear is increased, so that the casters can rotate smoothly and can change directions smoothly.

3. With the caster structure of the present invention, the brake device 80 has a simple structure and few components, so not only the manufacturing cost is low, but also the components are not easily damaged and the service life is long.

10: Assembly socket 11: Piercing holes 12: Combination hole 20: Rotating seat 21: Top plate 211: pivot hole 22: side panel 23: first pivot 24: second pivot 25: limit rod 30: Shaft 40: Wheels 41: wheel seat 411: Pivot Hole 412: Through 413: Limit 414: Reinforcement rib 42: Roller 50: shock absorber 51: Active pole 511: Pivot Hole 512: External thread section 52: Spring 53: Screw 54: Gasket 55: upper cover 551: upper sleeve groove 56: Lower cover 561: lower sleeve 60: Upper rotating device 61: Upper cover 611: first piercing 62: The first ball set 621: first ball 63: The second ball set 631: second ball 64: first ring piece 70: Lower rotating device 71: Lower cover 711: second perforation 72: The third ball set 721: Third Ball 73: second ring piece 80: Brake device 81: connection 811: first pole 812: second pole 82: Linkage 821: Operation Panel 83: Linkage 84: Brakes 841: fixed piece 842: Brake Pad

The first figure is a perspective view of the appearance of the present invention. The second figure is a three-dimensional exploded view of the present invention. The third figure is a partial three-dimensional exploded view of the present invention. The fourth figure is a side sectional view of the present invention. The fifth diagram is a diagram of the shock absorber depression state of the present invention. The sixth figure is a schematic diagram of the shock-absorbing action of the present invention. The seventh figure is a schematic diagram of the braking action of the present invention. Figure 8 is a perspective view of another embodiment of the present invention. Figure 9 is an exploded perspective view of another embodiment of the present invention.

10: Assembly socket

12: Combination hole

20: Rotating seat

22: side panel

23: first pivot

24: second pivot

25: limit rod

30: Shaft

40: Wheels

41: wheel seat

411: Pivot Hole

412: Through

413: Limit

42: Roller

50: shock absorber

51: Active pole

511: Pivot Hole

512: External thread section

52: Spring

53: Screw

54: Gasket

80: Brake device

81: connection

82: Linkage

821: Operation Panel

Claims (8)

A caster structure includes: a set of sockets with a through hole in the center; a rotating seat arranged on the lower side of the set of sockets, the rotating seat is provided with a top plate and formed by extending downward from opposite sides of the top plate The two side plates, the top plate is provided with a pivot hole, a first pivot rod and a second pivot rod are inserted and fixed between the two side plates; a shaft member penetrates the through hole of the assembly base and the pivot of the rotating base The connecting hole is pivoted so that the rotating seat is combined with the set of connecting seats, and the rotating seat can rotate relative to the set of connecting seats; a wheel set is arranged on the lower side of the rotating seat, and the wheel set is provided with a wheel seat and a wheel set A roller pivoted on the wheel seat, the wheel seat is provided with a pivot hole, the pivot hole of the wheel seat allows the first pivot rod to pass through and pivot, so that the wheel set can pass through the first pivot rod as an axis The center pivots relative to the rotating seat, and one end of the wheel seat corresponds to a through part below the second pivot rod; and a shock-absorbing device. The shock-absorbing device includes a movable rod, a spring, a screw member, and a The upper cover and the lower cover, the movable rod is provided with a pivot hole at one end, and an external thread section is provided at the opposite end. The pivot hole of the movable rod allows the second pivot rod to pass through and pivotally connect, so that the movable rod can pass through The second pivot rod is pivoted as the shaft center, the movable rod penetrates the through part of the wheel base and the spring, and the threaded part is combined with the threaded section of the movable rod to make the spring resist Between the wheel base and the screw member, the upper cover and the lower cover are respectively cushioned between the wheel base and the spring and between the spring and the screw member, and are respectively provided for the movable rod Wear, and should The upper cover is provided with an upper sleeve groove for positioning the upper end of the spring, and the lower sleeve cover has a lower sleeve groove for positioning the lower end of the spring, so that the shock absorber is suspended by the second pivot rod Become a suspension suspension system. The caster structure according to claim 1, further comprising an upper rotating device and a lower rotating device; the upper rotating device is disposed between the assembly base and the rotating base, and the upper rotating device includes an upper cover and a first The ball set, a second ball set and a first ring piece, the upper cover is provided with a first perforation in the center, the first perforation is for the shaft to pass through, and the first ball set is arranged in the shape of a larger ring Between the upper cover and the top plate of the rotating seat, the second ball set is arranged in a smaller ring shape between the upper cover and the top plate of the rotating seat, and the first ring piece is arranged between the first ball set and the top plate of the rotating seat. Between the second ball set; the lower rotating device is arranged on the lower side of the top plate of the rotating seat, the lower rotating device includes a lower cover, a third ball set and a second ring piece, the lower cover is provided with a center The second perforation, the second perforation for the shaft to pass through, the third ball set is arranged between the lower cover and the top plate of the rotating seat, and the third ball set corresponds to the first ball set and Between the second ball group. The caster structure according to claim 2, wherein the first ball set is composed of a plurality of first balls, the second ball set is composed of a plurality of second balls, and the third ball set is composed of a plurality of third balls, The diameter of the first ball is greater than the diameter of the second ball. The caster structure according to claim 1, further comprising a brake device, the brake device is arranged between the rotating base and the wheel set, and the brake device includes a connecting member, an operating member, a linkage member and a brake member , The connector is connected to the At one end of the rotating seat, a first rod body and a second rod body are penetrated on the connecting piece, one end of the operating piece is provided with an operating plate, the opposite end is pivotally connected to the first rod body, and one end of the linking piece is stacked on the On the operating member, the opposite end is pivotally connected to the second rod body, the brake member is provided with a fixing plate and a brake plate is bent and extended from one end of the fixing plate, and the fixing plate sandwiches the first rod body and the second rod Between the bodies, the brake pad is arranged between the linkage and the roller. The caster structure according to claim 1, further comprising a brake device, the brake device is arranged between the rotating base and the wheel set, and the brake device includes a connecting member, an operating member, a linkage member and a brake member , The connecting piece is integrally formed at one end of the rotating seat, a first rod and a second rod are penetrated on the connecting piece, an operating plate is provided at one end of the operating piece, and the opposite end is pivotally connected to the first rod One end of the linkage member is stacked on the operating member, and the opposite end is pivotally connected to the second rod body. The brake member is provided with a fixed plate and a brake plate is bent and extended from one end of the fixed plate. The fixed plate sandwiches the Between the first rod body and the second rod body, the brake pad is arranged between the linkage and the roller. The caster structure according to claim 1, wherein a plurality of coupling holes are provided near the periphery of the set of sockets. The caster structure of claim 1, wherein a limit rod is fixed between the two side plates of the rotating seat, and the wheel seat of the wheel set is provided with a limit part, and the limit part of the wheel seat can be The limit rod of the rotating seat stops and limits the maximum angle of the wheel set pivoting. The caster structure of claim 1, wherein the through part of the wheel seat of the wheel set is missing Orifice or through hole, two symmetrical reinforcing ribs are arranged on both sides of the through part.

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