TWM592829U - Alignment casters - Google Patents

Abstract

A positioning caster includes a base, an axle tube, a positioning block, and two roller units. The base includes an inner annular surface defining a horizontally penetrating shaft hole, the base is further provided with a positioning groove extending along the tangent direction of the inner annular surface and communicating with the shaft hole; the shaft tube is penetrated through the shaft hole, And includes a fixing section connected to the inner ring wall, and two side connecting sections axially exposed to the outside of the base, a groove corresponding to a positioning groove is recessed on the outer peripheral surface of the fixing section; The block penetrates the positioning groove and is partially embedded in the groove, so that the shaft tube is axially positioned in the shaft hole; the roller units are rotatably sleeved on the side connecting sections, respectively. With this structural design, the positioning caster has a hollow appearance.

Description

Positioning casters

The present invention relates to a caster, especially a positioning caster with a hollow shape.

The existing positioning caster includes a wheel base and a roller pivotally connected to the wheel base. Since the axis of the roller needs to be pivotally connected to the wheel base, it cannot be designed as a hollow caster. Chinese patent CN100441428C discloses a positioning caster with a hollow appearance, which includes a hollow seat body, a sleeve passing through the seat body and having two cylindrical parts, and two sleeves respectively rotatably arranged in the sleeve The wheels of these cylindrical parts of the barrel. In order to ensure that the sleeve does not displace and rotate relative to the seat body, the outer peripheral surface of the sleeve is provided with a ring-shaped groove and two tangent planes, and the inner peripheral surface of the seat body is provided with an insertable card A ring-shaped ridge of the groove, and two flat surfaces respectively corresponding to the aforementioned cutting planes, the groove and the ring-shaped ridge restrict the sleeve from moving horizontally relative to the seat body, and The tangent plane and the flat surfaces restrict the sleeve from rotating relative to the seat body.

Although the aforementioned positioning caster can have a hollow appearance, since the sleeve and the seat body use the groove and the ring-shaped ridge to engage with each other, the ring-shaped ridge and the sleeve are forced to be slightly elastically deformed during assembly So that the sleeve penetrates the seat body from its axial direction, this structure is not only unfavorable for assembly, and in order to assemble the sleeve into the seat body smoothly, the material of the sleeve and the seat body must be With appropriate elasticity, the strength of the positioning caster is greatly reduced.

The purpose of the present invention is to provide a positioning caster capable of overcoming at least one disadvantage of the prior art.

Therefore, the new positioning caster includes a base, an axle tube, a positioning block, and two roller units. The base includes an inner annular surface defining a horizontally penetrating shaft hole, the base is further provided with a positioning groove extending along the tangent direction of the inner annular surface and communicating with the shaft hole; the shaft tube is penetrated through the shaft hole, And includes a fixing section connected to the inner ring wall, and two side connecting sections respectively connected to two opposite sides of the fixing section in the axial direction and exposed outside the base, the outer peripheral surface of the fixing section is concavely provided with a corresponding A groove of a positioning groove; the positioning block is inserted into the positioning groove and partially embedded in the groove, so that the shaft tube is positioned laterally in the shaft hole; the roller units are rotatably sleeved on the sides Continue.

The effect of the present invention lies in that the positioning block penetrates the positioning groove and is partially embedded in the groove, so that the shaft tube cannot be moved left or right relative to the base or rotatably penetrate the base. The shaft tube is not connected to the base by means of a concave-convex elastic inlay, which can improve the convenience of assembling the shaft tube and the base.

Referring to FIGS. 1 to 4, an embodiment of the novel positioning caster includes a base 1, a shaft tube 2, a positioning block 3, two roller units 4, a brake unit 5, and a mounting seat 6.

The base 1 includes an inner annular surface 11 defining a laterally penetrating shaft hole 101, an outer annular surface 12 radially opposite to the inner annular surface 11, and two respectively connected to the inner annular surface 11 and the The side surface 13 between two opposite sides of the axial direction of the outer annular surface 12. The inner annular surface 11 has a planar section 111 extending longitudinally and in a planar shape, and an annular section 112 connected to the upper and lower sides of the planar section 111 and defining the shaft hole 101 together with the planar section 111. The base 1 is further provided with a positioning groove 102 extending from the bottom side of the outer annular surface 12 upwards along the tangential direction of the annular surface section 112 through the annular surface section 112 to partially communicate with the shaft hole 101, and a positioning groove 102 The positioning grooves 102 extend upward from the bottom side of the outer ring surface 12 at intervals to pass through the screw holes 103 communicating with the shaft hole 101.

The shaft tube 2 penetrates the shaft hole 101 and includes a fixed section 21 connected to the inner annular surface 11 and two axially opposite sides of the fixed section 21 respectively and exposed to the base 1外的边接段22. The fixing section 21 has a flat anti-rotation plane 212 that is flat and is in contact with the plane section 111, and a groove 211 that is recessed on the outer peripheral surface and corresponds to the positioning groove 102.

The positioning block 3 is in the form of a cylinder, which penetrates upwards in the positioning groove 102 and partially protrudes inwardly from the toroidal section 112 from the connection between the positioning groove 102 and the shaft hole 101, and is embedded in the shaft In the groove 211 of the tube 2.

2, 5 and 6, the roller units 4 are respectively rotatably sleeved on the side connecting sections 22, and each roller unit 4 includes a rim rotatably sleeved on the respective side connecting section 22 42 and a bearing 41 disposed between the rim 42 and the corresponding side connecting section 22, the rim 42 has a brake ring portion 421 protruding toward the base 1 past the bearing 41.

The braking unit 5 includes two braking members 51 respectively extending laterally outward from the side surfaces 13 and for respectively abutting the braking ring portions 421, and an elasticity disposed between the base 1 and the axle tube 2 A piece 52, and a switching piece 53 screwed upward to the screw hole 103 and pushing up the fixing portion 22 in the past. The elastic member 52 is elastically supported up and down between the base 1 and the axle tube 2, and will constantly drive the axle tube 2 to drive the rims 42 to move downward relative to the base 1 and cause the brake ring portions 421 Respectively abut the brakes 51.

The base 1 can be displaced up and down relative to the shaft tube 2 at a rotation-limiting position and a rotation position. When the base 1 is at the rotation-limiting position (see FIG. 5 ), the braking members 51 are respectively abutted against the shafts The brake ring portion 421 restricts rotation of the rims 42 relative to the axle tube 2. When the base 1 is subjected to a downward external force to overcome the elastic force of the elastic member 52 disposed between the base 1 and the shaft tube 2, the base 1 will be displaced downward from the rotation-limiting position to the rotation Position (see FIG. 6), at this time, the braking members 51 are detached downward from the braking ring portions 421, so that the rims 42 can rotate relative to the axle tube 2, and the elastic member 52 is compressed and accumulated An elastic recovery force. When the external force is removed, the elastic member 52 releases the elastic restoring force to restore the base 1 upward to the rotation limiting position.

Referring to FIG. 7, the switching member 53 is screwed into the screw hole 103 of the base 1 and abuts radially on the outer circumferential surface of the fixing section 21. The switching member 53 is located directly below the elastic member 52 and can be screwed and shifted to push the fixed section 22 upward relative to the base 1, so that the fixed section 22 overcomes the elastic force of the elastic member 52 and faces the base 1 Moving up and disengaging the braking torus 421 from the braking members 51 displaces the base 1 to the rotational position.

The mounting base 6 is connected to the outer annular surface 12 of the base 1 and is used for mounting on a piece of furniture (not shown). Because there are many types of the mounting base 6 for mounting on furniture, and the mounting base 6 is not The creative focus of this new model is omitted here.

When the new positioning caster is assembled, the mounting base 6 is integrally connected to the base 1, the shaft tube 2 is inserted into the shaft hole 101, so that the fixed section 21 is aligned with the anti-rotation plane 212 The plane section 111 of the torus 11 is received in the shaft hole 101, so that the side connecting sections 22 protrude from the base 1 respectively. Then, the positioning block 3 is inserted and fixed in the positioning groove 102, and the shaft tube 2 cannot horizontally move and rotate relative to the base 1 left and right axially, and finally the roller units 4 are respectively sleeved on the The equal side connecting section 22 completes the assembly of the whole positioning caster.

It should be particularly noted that the shaft tube 2 is fixed by the positioning block 3 through the positioning groove 102 and the groove 211, and the plane section 111 and the rotation-preventing plane 212 abut against each other, and cannot be axis The displacement and rotation are positioned in the shaft hole 101, but in practice, the plane section 111 and the rotation stop plane 212 are unnecessary, and will not affect the positioning of the shaft tube 2 and the base 1.

In use, the new positioning caster is installed on the bottom of the furniture by the mounting seat 6, such as but not limited to the seat leg, the user can first displace the switching member 53 downward or upward, And it is adjusted whether the switching member 53 supports the fixing section 22 to compress the elastic member 52. When the switching member 53 is adjusted to support the fixed section 22 and the fixed section 22 is compressed to compress the elastic member 52, the base 1 will remain in the rotating position, so the positioning caster does not have a brake braking function.

When the switching member 53 is adjusted to not support the fixing section 22, the upper and lower elastic supports of the elastic member 52 are designed to support the weight of the furniture, so when the furniture does not carry other heavy objects, the elastic member 52 will keep the base 1 in the limited rotation position. After the furniture carries a heavy object, the weight of the heavy object is transmitted to the base 1 through the mounting seat 6, so that the base 1 moves downward to the rotation position relative to the shaft tube 2 and compresses the elastic member 52. Therefore, the roller unit 4 can rotate relative to the shaft tube 2. For example, the furniture is a seat. When the user sits on the seat, the base 1 will move to the rotation position, and the user can slide the seat by the roller units 4, and when the user When standing up and leaving the seat, the base 1 moves up to the rotation-limiting position, so that the seat cannot be displaced through the roller units 4.

It should be added that the brake unit 5 and the brake ring portion 421 are not necessary for implementation. If the positioning caster is not provided with the brake unit 5, the roller units 4 can always rotate relative to the axle tube 2 without Brake function.

In summary, the function of the new positioning caster is that the groove 211 and the positioning groove 102 can be positioned by the positioning block 3, so that the shaft tube 2 cannot be displaced and rotated relative to the base 1 left and right, The shaft tube 2 and the base 1 which replace the existing hollow positioning casters are positioned by mutual deformation and clamping of elastic materials, which is not only convenient for assembly, but the shaft tube 2 and the base 1 can also be selected from non-elastic materials to increase strength , So it can indeed achieve the purpose of this new type.

However, the above are only examples of the new model. When the scope of the new model cannot be limited by this, any simple equivalent changes and modifications made according to the patent application scope and patent specification content of the new model are still regarded as Within the scope of this new patent.

1: pedestal 101: shaft hole 102: positioning groove 103: screw hole 11: inner torus 111: plane segment 112: torus segment 12: outer torus 13: Side 2: shaft tube 21: fixed segment 211: Groove 212: anti-rotation plane 22: Side connection section 3: positioning block 4: Roller unit 41: Bearing 42: rim 421: Brake ring 5: braking unit 51: Brake parts 52: Elastic piece 53: switch piece 6: Mount

Other features and functions of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: FIG. 1 is a perspective view of an embodiment of the present invention; FIG. 2 is an exploded perspective view of the embodiment; Figure 3 is a side sectional view of the embodiment; 4 is a top cross-sectional view of the embodiment; 5 is a side cross-sectional view of the embodiment from another angle of view, illustrating a base in a limited rotation position; Figure 6 is a view similar to Figure 5 illustrating the base in a rotated position; and FIG. 7 is a view similar to FIG. 5, illustrating that a switching member is adjusted to support a shaft tube upward, so that the base is in a rotational position.

1: pedestal

101: shaft hole

102: positioning groove

103: screw hole

11: inner torus

111: plane segment

112: torus segment

12: outer torus

13: Side

2: shaft tube

21: fixed segment

211: Groove

212: anti-rotation plane

22: Side connection section

3: positioning block

4: Roller unit

41: Bearing

42: rim

5: braking unit

51: Brake parts

52: Elastic piece

53: switch piece

6: Mount

Claims (7)

A positioning caster, including: A base includes an inner annular surface defining a horizontally penetrating shaft hole, and the base is further provided with a positioning groove extending along the tangential direction of the inner annular surface and communicating with the shaft hole; A shaft tube, penetrating through the shaft hole, and comprising a fixed section connected to the inner ring surface, and two side connecting sections respectively connected to the opposite axial sides of the fixed section and exposed outside the base, A groove corresponding to the positioning groove is recessed on the outer peripheral surface of the fixed section; A positioning block penetrated through the positioning groove and partially embedded in the groove, so that the shaft tube is positioned laterally in the shaft hole; and The two roller units are respectively rotatably sleeved on the side connecting sections. The positioning caster according to claim 1, wherein the positioning groove extends longitudinally from bottom to top from the outer ring surface. The positioning caster according to claim 2, wherein the inner ring mask of the base has a planar section extending longitudinally, and the fixing section further has a planar section that is in contact with the planar section Stop plane. The positioning caster according to claim 3, wherein the base further has two side surfaces respectively connected between two axially opposite sides of the inner ring surface and the outer ring surface, and the positioning caster further includes a braking unit, The brake unit includes two brake members extending laterally outward from the sides, and an elastic member disposed between the base and the axle tube, and each roller unit has a brake member that can be abutted by the corresponding brake member A brake ring part, the base can be in a rotation-limiting position relative to the axle tube to make the brake parts respectively abut the brake ring parts to restrict the rotation of the roller unit, and a brake part and the When the brake ring is separated, the roller units can be displaced up and down between the rotation positions around which the axle tube can rotate. The elastic member always has an elastic force that elastically pushes the base toward the rotation limiting position. The positioning caster according to claim 4, wherein each roller unit includes a rim sleeved on the respective side joint section, and a bearing provided between the corresponding rim and the corresponding side joint section, Each brake ring portion is provided at a position where the corresponding rim axially protrudes toward the base axially to the corresponding bearing. The positioning caster according to claim 4, wherein the braking unit further includes a screwed to the base and radially abuts against the outer peripheral surface of the fixed section, and can be screwed and shifted toward the fixed section relative to the base, The switching member that drives the base to move relative to the fixed section and is positioned at the rotational position. The positioning caster according to claim 1, wherein each roller unit includes a rim sleeved on the respective side joint section, and a bearing disposed between the corresponding rim and the corresponding side joint section.

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