TWI824205B - Caster device - Google Patents

Abstract

A caster device includes a base unit with a base, a roller unit, and a braking unit. The base has an outer peripheral surface, two side surfaces, a mounting hole, and a through hole that penetrates the outer peripheral surface and communicates with the mounting hole. The roller unit includes two rollers connected to the base unit and having internal toothed annulus surfaces. The braking unit includes a rotating member located in the mounting hole and having two rotating surfaces, and a control member passing through the through hole and connected to the rotating member. When the control member is manipulated, it can drive the rotating member to a rotating position where each rotating surface engages the internal toothed annulus, and a rotatable position spaced between each rotating surface and the internal toothed annulus. Move between locations. The design of the base and the braking unit can effectively reduce the size of the caster device and the exposed braking structure.

Description

Caster device

The present invention relates to a caster suitable for being installed on a piece of furniture, and in particular to a lightweight caster device.

Referring to Figure 1, the casters currently installed on furniture (such as cabinets) have a base 11 connected to the furniture, a roller unit 12 rotatably installed on the base 11, and a roller unit 12 installed on the base. 11 and can control the braking group 13 that the roller unit 12 cannot rotate when being manipulated.

The roller unit 12 includes one or two rollers 121 rotatably mounted on the base 11 (two rollers 121 are shown in FIG. 1 ). The braking unit 13 includes a control part 131 pivotally connected to the base 11 , and two brake pads 132 respectively connected to the control part 131 and located at the radial top sides of the rollers 121 .

The braking group 13 is controlled to switch between a release position and a braking position. In the release position, the brake pads 132 are radially spaced apart from the rollers 121 and are located outside the rollers 121 . When the control part 131 is pressed down, the brake pads 132 will be driven to rotate until the brake group 13 is in the braking position. At this time, the brake pads 132 will rotate. The brake pads 132 are pressed against the rollers 121 respectively, and the rollers 121 are limited by the high friction with the brake pads 132 to stop relative rotation, thereby achieving the purpose of braking.

Although the brake pads 132 can stop the rotation of the rollers, with the current design of the caster, the brake pads 132 are located radially outside the rollers 121 and cannot effectively reduce the size of the caster. The exposed brake pads 132 are also The overall appearance is not smooth and concise.

Therefore, it is an object of the present invention to provide a caster device capable of overcoming at least one disadvantage of the prior art.

Therefore, the caster device of the present invention includes a base unit, a roller unit, and a braking unit.

The base unit includes a base. The base has an outer peripheral surface and two axially spaced side surfaces connected to the outer peripheral surface. The base also has a mounting hole penetrating the side surfaces, and a through hole penetrating the outer peripheral surface and communicating with the mounting hole.

The roller unit includes two rollers rotatably connected to two opposite axial sides of the base unit, and each roller has an internal toothed ring surface.

The braking unit includes a rotating member that is movably located in the mounting hole of the base and has two rotating surfaces, and a through hole that passes through the base. And connected to the control part of the rotating part. Each turning surface is exposed on the respective side and faces the respective internal tooth ring surface. When the control member is manipulated, it can drive the rotation member relative to the base at a rotation position where each rotation surface is fitted to the corresponding inner gear ring surface, and each rotation surface is in contact with the corresponding inner gear ring surface. The gear ring surface space is moved between a rotatable position.

The effect of the present invention is to use the control member to extend into the through hole of the base, and the rotating surfaces can be fitted into the internal tooth ring surfaces, effectively utilizing the internal space of the base and reducing the cost of the base. The exposed brake structure reduces the size of the caster device and also provides a simple appearance.

2: Base unit

21:Pedestal

211:Shaft hole

212:Inner surface

213:Outer peripheral surface

214:Side

215:Mounting surface

216: Plane segment

217:Subject

210: Card Arrival Department

218: First fixed surface segment

219:Second fixed surface segment

2101: raised area

51:Mounting hole

52:Threading hole

53: Medial segment

54:Outer side segment

22: Shaft tube group

222: Shaft barrel

223:Bearing

224: Fixed barrel

225:Sleeve barrel

226: Anti-rotation surface

23:Mounting seat

3:Roller unit

31:Roller

311: Internal gear ring surface

312: set surface

4: Braking unit

41: Transfer parts

411: Turn noodles

412: Interlocking noodles

413: Linkage slot

414: Close to the surface segment

415: against the noodle segment

42:Control parts

421: Pivot joint

422: Interaction Department

423:Control Department

420: Pivot joint

L: axial

T1: transverse direction

D1: spacing

D2:Thickness

D3:Thickness

D4:Thickness

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: Figure 1 is a perspective view illustrating an existing caster; Figure 2 is a perspective view illustrating an implementation of the caster device of the present invention Example; Figure 3 is a top view of this embodiment; Figure 4 is a perspective exploded view of some components of this embodiment; Figure 5 is a perspective exploded view of this embodiment; Figure 6 is a transverse sectional view of this embodiment, illustrating This embodiment is in a rotatable position; Figure 7 is a cross-sectional view taken along line VII-VII of Figure 3, illustrating that this embodiment is in a rotatable position. The rotatable position; Figure 8 is a cross-sectional view taken along line VIII-VIII, illustrating the embodiment in the rotatable position; Figure 9 is a view similar to Figure 7, illustrating the embodiment in a rotation position; and Figure 10 is a view similar to Figure 8 illustrating this embodiment in this rotational position.

One embodiment of the caster device of the present invention is suitable for being installed on the bottom side of items (not shown) such as furniture, and suitable for rolling on a flat surface. Therefore, once the user can push the item effortlessly, the item can be moved on the plane through the arrangement of the caster device.

Referring to Figures 2 to 4, the caster device includes a base unit 2, a roller unit 3 rotatably installed on the base unit 2, and a roller unit 3 installed on the base unit 2 and capable of controlling the roller unit 3. Braking unit 4 that stops rotation. The base unit 2 includes a base 21 with a generally circular cross-section and a hollow base, a shaft tube group 22 passing through the base 21 , and a mounting base 23 connected to the base 21 .

Referring to FIGS. 5 to 7 , the base 21 has an inner circumferential surface 212 defining an axis hole 211 extending along an axial direction L, and an outer periphery spaced apart from the inner circumferential surface 212 and surrounding the inner circumferential surface 212 . The surfaces 213 and two side surfaces 214 are spaced front and back along the axial direction L and connect the front and rear edges of the inner circumferential surface 212 and the outer circumferential surface 213 respectively, and a mounting surface 215 spaced between the inner circumferential surface 212 and the outer circumferential surface 213 .

The inner circumferential surface 212 has a planar section 216 located on the right side. The outer peripheral surface 213 has two first fixing surface segments 218 spaced axially L apart from each other and located on the lower right side of the shaft hole 211 and recessed toward the inner peripheral surface 212 , and two second fixed surface segments 219 spaced apart from each other. The cross-sections of each first fixing surface segment 218 and the respective second fixing surface segment 219 that are transverse to the axial direction L are concave surfaces that are concave toward the inner circumferential surface 212 and are connected to each other, and their interfaces are A raised area 2101 is defined. The base 21 also has a generally square mounting hole 51 located at intervals on the right side of the shaft hole 211 , and a through hole 52 penetrating the outer peripheral surface 213 and communicating with the mounting hole 51 . Specifically, the through hole 52 extends upward from the first fixing surface segments 218 and the second fixing surface segments 219 to the mounting hole 51 and communicates with the mounting hole 51 . The mounting hole 51 passes through the side surfaces 214 front and rear along the axial direction L and is defined by the mounting surface 215 . The through hole 52 is axially spaced from the side surfaces 214 . The mounting surface 215 has an inner side section 53 adjacent to the inner circumferential surface 212 and away from the outer circumferential surface 213 , and an outer side section 54 adjacent to the outer circumferential surface 213 and away from the inner circumferential surface 212 .

More specifically, the physical part of the base 21 includes a main body 217 and two plate-shaped blocking portions 210 integrally connected to the main body 217 and spaced forward and backward from each other along the axial direction L. The blocking portions 210 are respectively located at opposite front and rear side edges of the through hole 52 along the axial direction L. Each blocking portion 210 has a respective first fixing surface section 218 and a respective second fixing surface section 219 . The engaging portions 210 are located in the control The linking portion 422 of the component 42 is on two opposite sides in the axial direction L, so that the pivot portion 421 is limited in the axial direction L between the blocking portions 210 .

The shaft tube group 22 is passed through the shaft hole 211 of the base 21 and has a shaft tube 222 that is passed through the shaft hole 211 of the base 21 and two bearings 223 . The shaft barrel 222 has a fixed barrel portion 224 located in the shaft hole 211, and two sleeve barrel portions respectively extending in the axial direction L from the front and rear opposite sides of the fixed barrel portion 224 and respectively exposed on the side surfaces 214. 225. Each bearing 223 is sleeved on its respective sleeve portion 225 . The fixed cylinder portion 224 of the shaft barrel 222 has a rotation-stop surface 226 abutting against the planar section 216 of the inner peripheral surface 212 , so the shaft barrel 222 does not rotate relative to the base 21 .

The mounting seat 23 extends upward from the outer peripheral surface 213 of the base 21 and is located on the left side of the shaft hole 211 for being assembled with the object.

The roller unit 3 has two rollers 31 respectively rotatably sleeved on two opposite sides in the axial direction L of the shaft tube group 22 . Each roller 31 is sleeved on its respective bearing 223 and has a radially inward and generally annular internal tooth ring surface 311 exposed from the bearing 223 . Each roller 31 also has a sleeve surface 312 that is sleeved with the corresponding bearing 223, and in each roller 31, the sleeve surface 312 and the internal tooth ring surface 311 are parallel in the axial direction L. .

The braking unit 4 includes a rotating member 41 that passes through the mounting hole 51 of the base 21 , and a control unit that passes through the through hole 52 and is connected to the rotating member 41 . Item 42. The thickness D2 of the rotation member 41 in a transverse direction T1 transverse to the axial direction L is smaller than the distance D1 between the inner side section 53 and the outer side section 54 of the mounting surface 215 , so that it can move along the transverse direction. T1 is displaced left and right between the inner side section 53 and the outer side section 54 . The rotation member 41 has two rotation surfaces 411 exposed on the base 21 and a linkage surface 412 defining a linkage groove 413 . Each turning surface 411 is exposed on the respective side surface 214 and faces rightward toward the respective internal tooth ring surface 311 . When the rotation member 41 moves to the right, each rotation surface 411 can be engaged with the corresponding inner tooth ring surface 311 (as shown in FIG. 10 ). The linkage surface 412 of the rotation member 41 has a contact surface section 414 that can be adjacent to the inner side section 53 and extend up and down, and a contact surface that is spaced apart from the contact surface section 414 and away from the inner side section 53 Paragraph 415. The abutment surface section 415 first extends from top to bottom, and then extends obliquely downward and radially to the right, so that the linkage groove 413 expands outward obliquely downward. The axial L projection positions of the rotating surfaces 411 and the linkage groove 413 overlap.

The control member 42 includes a through hole 52 in the base 21 and is pivotally connected to the pivot portion 421 of the base 21 by a pivot member 420. A pivot portion 421 extends upward and passes out. The through hole 52 extends into the linkage portion 422 of the linkage groove 413, and a control portion 423 is integrally connected to the pivot portion 421 and is spaced apart from the linkage portion 422 and located on the radially right outer side of the outer peripheral surface 213. . The axial thickness D3 of the control portion 423 is greater than the thickness D4 of the pivot portion 421 , and is locked against the first fixing surface segments 218 of the outer peripheral surface 213 .

The control part 423 of the control member 42 is moved along an arrow direction by a user. When pulled toward A, the rotation member 41 can be driven to move relative to the base 21 between a rotatable position (as shown in FIGS. 6 to 8 ) and a rotation position (as shown in FIGS. 9 and 10 ).

Referring to FIGS. 6 to 8 , when the rotation member 41 is in the rotatable position, the control portion 423 abuts the first fixed surface section 218 of the outer peripheral surface 213 , and the linkage portion 422 abuts against the linkage surface 412 . Each rotating surface 411 is spaced apart from the corresponding internal tooth ring surface 311 of the contact surface segment 414 , so that the rollers 31 are not constrained by the rotating member 41 and can rotate relative to the base 21 .

Referring to FIGS. 9 and 10 , the user pulls the control part 423 of the control member 42 downward along the arrow A until the control part 423 engages the second second members along the outer peripheral surface 213 . When the surface segment 219 is fixed, the linkage portion 422 rotates clockwise as the control portion 423 pivots, and pushes against the resisting surface segment 415 of the linkage surface 412, causing the rotation member 41 to move to the right, and every time A braking surface 411 is fitted into the corresponding internal gear ring surface 311 and moves from the rotatable position to the rotating position. At this time, the roller unit 3 is blocked by the rotating member 41 and cannot rotate. When the user pulls the control part 423 upward along the arrow A, the control part 42 will again drive the rotation member 41 to move to the left and return to the rotatable position (as shown in Figures 6 to 8) , so that the roller unit 3 can rotate.

Since the pivot portion 421 of the control member 42 passes through the through hole 52 of the base 21 and the linkage portion 422 extends into the linkage groove 413, the connection between the rotation member 41 and the base 21 can be fully utilized. axial width (thickness) to accommodate the control member 42, and then The rotating surfaces 411 can be fitted into the internal gear ring surfaces 311, effectively reducing the overall volume of the caster device and making the appearance of the caster device relatively simple without revealing too many components.

To sum up, the caster device of the present invention uses the control member 42 to extend into the through hole 52 of the base 21 to effectively utilize the internal space of the base 21; it cooperates with the rotating surfaces 411 and the linkage groove. The axial L projection position of 413 overlaps, so that the width D2 of the rotating member 41 does not need to be relatively large, that is, the rollers 31 can be embedded and moved by the control member 42 at the same time, and the inner peripheral surface can be reduced. 212 and the outer peripheral surface 213. In an environment where the axle tube group 22 is provided so that there is not much thickness left in the base 21, it can also have a braking function and maintain a simple appearance, and the braking unit 4 is used to control the rotation or non-rotation of the roller unit 3. Therefore, the purpose of the present invention can indeed be achieved.

However, the above are only examples of the present invention, and should not be used to limit the scope of the present invention. All simple equivalent changes and modifications made based on the patent scope of the present invention and the content of the patent specification are still within the scope of the present invention. Within the scope covered by the patent of this invention.

2: Base unit

21:Pedestal

213:Outer peripheral surface

214:Side

51:Mounting hole

52:Threading hole

22: Shaft tube group

223:Bearing

225:Sleeve barrel

23:Mounting seat

3:Roller unit

31:Roller

311: Internal gear ring surface

312: set surface

4: Braking unit

41: Transfer parts

411: Turn noodles

42:Control parts

421: Pivot joint

422: Interaction Department

423:Control Department

Claims (5)

A caster device includes: a base unit, including a base, the base has an outer circumferential surface, and two axially spaced side surfaces connected to the outer circumferential surface, and the base also has a mounting that penetrates the side surfaces. hole, and a through hole that penetrates the outer peripheral surface and communicates with the mounting hole; a roller unit includes two rollers rotatably connected to two opposite axial sides of the base unit, each roller having an inner a gear ring surface; and a braking unit, including a rotating member that is movably located in the mounting hole of the base and has two rotating surfaces relative to the base, and a through hole that passes through the base And connected to the control part of the rotation part, each rotation surface is exposed on the respective side and faces the respective inner tooth ring surface. When the control part is controlled, it can drive the rotation part relative to the base. Each rotating surface is fitted into a corresponding rotating position of the internal toothed ring surface, and each rotating surface moves between a rotating position spaced from the corresponding internal toothed ring surface, wherein the base further having an inner peripheral surface radially spaced from the outer peripheral surface and defining a shaft hole extending along the axial direction, and a mounting surface located between the inner peripheral surface and the outer peripheral surface and defining the mounting hole, the The through hole of the base is axially spaced from the side surfaces. The mounting surface has an inner side section adjacent to the inner peripheral surface and an outer side section adjacent to the outer peripheral surface. The inner side section and the outer side surface The distance between the segments is greater than the thickness of the rotating member of the braking unit in a transverse direction transverse to the axial direction, so that the rotating member can move between the inner side segment and the outer side segment when being driven. Displace along the transverse direction, wherein the rotating member of the braking unit has a linkage groove defined The linkage surface, the control member includes a pivot portion pivotally connected to the base of the base unit and located in the through hole, a through hole connected to the pivot portion and passing through the base, and The linkage portion extends into the linkage groove of the rotation piece, and a linkage portion is spaced from the linkage portion and is connected to the pivot portion and is located outside the outer peripheral surface of the base and can pivot relative to the base when being manipulated. The control part of the pendulum, wherein the outer peripheral surface of the base has two first fixed surface segments and two second fixed surface segments spaced apart from each other, and each second fixed surface segment is connected to the respective first fixed surface. segment, the control part of the control part is stuck against the outer peripheral surface. When the rotation part is in the rotatable position, the control part is stuck against the first fixed surface segments. When the rotation part is in the rotation position, When in the rotating position, the control part is stuck against the second fixed surface segments, wherein the base of the base unit also has an inner peripheral surface spaced apart from the outer peripheral surface and defining an axial hole, and the inner peripheral surface The two opposite axial sides are connected to the side surfaces. The base unit also includes an axle tube group that passes through the axle hole and protrudes from the side surfaces. Each roller is sleeved on two axial sides of the axle tube group. At the opposite end, the shaft tube group has an axle barrel that passes through the axle hole, and two bearings that are sleeved on the axle barrel and exposed on the side surfaces respectively, and each roller is sleeved on its own bearing, wherein , each roller also has a sleeve surface connected to the corresponding bearing, and in each roller, the sleeve surface and the internal tooth ring surface are parallel in the axial direction. The caster device according to claim 1, wherein the projected positions of the turning surfaces and the linkage groove in the axial direction overlap with each other. The caster device as claimed in claim 1, wherein the linkage of the rotating member The mask has a contact surface section adjacent to the inner side section of the installation surface, and a contact surface section away from the inner side section. When the linkage portion of the control element abuts against the contact surface section, the contact surface section The rotating member is in the rotatable position. When the control member is controlled to pivot, the linkage portion of the control member pushes against the resisting surface segment, causing the rotating member to move from the rotatable position to the rotating position. Location. The caster device according to claim 1, wherein the base further includes a main body, and two engaging portions integrally connected to the main body and respectively located at two opposite side edges of the through hole along the axial direction. , each engaging portion has a respective first fixing surface segment and a respective second fixing surface segment, and the engaging portions are located on two opposite axial sides of the linkage portion of the control member, so as to The pivot portion is axially limited between the blocking portions. The caster device according to claim 1, wherein the cross section of any one of the first fixed surface segments and the second fixed surface segments of the outer peripheral surface that is transverse to the axial direction is directed toward the inner peripheral surface. The surface is a concave surface, and the intersection between each first fixed surface segment and the corresponding second fixed surface segment defines a convex area.

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