CN217682931U

CN217682931U - Brake mechanism and lifting upright post adopting same

Info

Publication number: CN217682931U
Application number: CN202221136897.7U
Authority: CN
Inventors: 许金东; 黄忠平; 刘涛
Original assignee: Changzhou Kaidi Electrical Co Ltd
Current assignee: Changzhou Kaidi Electrical Co Ltd
Priority date: 2022-05-11
Filing date: 2022-05-11
Publication date: 2022-10-28
Anticipated expiration: 2032-05-11
Also published as: WO2023217306A3; WO2023217306A2

Abstract

The utility model belongs to the technical field of the lift stand technique and specifically relates to a arrestment mechanism and adopt this arrestment mechanism's lift stand. A brake mechanism comprises a connecting piece, a mounting seat and a first friction piece, wherein the connecting piece comprises a first spline part, a step part, an intermediate connecting part and a second spline part which are sequentially arranged, the second spline part and the intermediate connecting part both penetrate through the mounting seat, and the step part is abutted against the end surface of the mounting seat; the first friction piece is sleeved on the middle connecting part, the first friction piece is directly or indirectly fixed on the mounting seat, and the first friction piece and the connecting piece do not axially rotate. Still relate to the lift stand that adopts above-mentioned brake mechanism. The friction damping generated by the mounting seat, the connecting piece and the first friction piece enables the lifting resistance of the lifting upright column to be nearly consistent, and the shaking caused by the damping difference during starting is avoided; the self-locking spring arranged on the braking mechanism has unidirectional self-locking performance, and the self-locking performance of the lifting upright post provided with the braking mechanism can be further improved.

Description

Brake mechanism and lifting upright post adopting same

Technical Field

The utility model belongs to the technical field of the lift stand technique and specifically relates to a arrestment mechanism and adopt this arrestment mechanism's lift stand.

Background

The lifting upright column in the prior art has more technical problems, such as unstable lifting, shaking, shell clamping and the like, and part of lifting speed is slower. In addition, the lifting upright post needs a reliable self-locking mechanism in actual use, so that the phenomenon of sliding down can not occur. At present, the brake mechanism structure of lift stand is more complicated, and the installation is inconvenient, can be along with the increase of gravity grow gradually a bit to two-way frictional resistance can lose driving motor's performance.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: overcomes the defects in the prior art and provides a brake mechanism.

The utility model provides a technical scheme that its technical problem adopted is: a brake mechanism comprises a connecting piece, a mounting seat and a first friction piece, wherein the connecting piece comprises a first spline part, a step part, an intermediate connecting part and a second spline part which are sequentially arranged, the second spline part and the intermediate connecting part both penetrate through the mounting seat, and the step part is abutted against the end surface of the mounting seat; the first friction piece is sleeved on the middle connecting portion, the first friction piece is directly or indirectly fixed on the mounting seat, and the first friction piece and the connecting piece do not axially rotate.

The connecting piece structure that so sets up is convenient for simultaneously be connected with first friction piece, mount pad, and guarantees that first friction piece and connecting piece do not take place axial rotation, plays the braking action.

Furthermore, the fixing device further comprises a self-locking spring, wherein the self-locking spring is sleeved on the middle connecting part, and one end of the self-locking spring is fixed on the mounting seat.

And a self-locking spring is arranged, so that the self-locking performance of the connecting piece and the mounting seat is improved.

Furthermore, the mounting seat is provided with a plurality of peripheral walls, a limiting groove is formed at the included angle formed by the two peripheral walls, a hook is convexly formed on the self-locking spring, and the hook is embedded into the limiting groove.

So set up, guarantee that auto-lock spring and mount pad are static relatively.

Further, the mounting base is provided with a plurality of peripheral walls, at least one peripheral wall is provided with a groove, a boss is arranged on the outer ring of the first friction piece, and the boss is embedded into the groove.

Through the cooperation of boss and recess, be convenient for the connection of mount pad and first friction piece.

Furthermore, the two side walls of the groove are provided with elastic sheets and avoiding holes, when the boss is installed in the groove, the elastic sheets are pressed into the avoiding holes, and after the boss passes through the elastic sheets, the elastic sheets reset so that the first friction piece is fixed on the installation seat.

Set up the elastic component and dodge the hole, further consolidate the fastness of connection of mount pad and first friction spare.

Furthermore, the inner ring of the first friction piece is provided with an extension part and a barb positioned at the end part of the extension part, the extension part is sleeved with a holding spring, and the holding spring is held and limited on the first friction piece by the barb.

Still further, the extension has cuts arranged equidistantly or non-equidistantly.

The notch is arranged to make the first friction member have certain elasticity.

Furthermore, an elastic part and a clamping spring are sequentially arranged below the first friction part, and the elastic part and the clamping spring directly or indirectly form radial pressure on the first friction part.

Furthermore, a second friction plate is arranged between the first friction piece and the self-locking spring and/or between the first friction piece and the elastic piece, and the second friction plate and the connecting piece are axially fixed.

Furthermore, the middle connecting part comprises a first cylindrical part, a non-circular part and a second cylindrical part, the first friction piece and the second friction piece are sleeved on the non-circular part, the inner hole of the second friction piece is matched with the outer contour shape of the non-circular part, a clamping groove is formed in the second cylindrical part, and the clamping spring is arranged in the clamping groove.

Furthermore, a limiting step is formed at the joint of the first cylindrical part and the non-circular part, and the second friction plate is radially limited between the limiting step and the first friction piece.

Further, the radial length of the non-circular portion is greater than the thicknesses of the first friction member and the second friction plate and less than the thicknesses of the first friction member and the two second friction plates.

Furthermore, the mounting seat is provided with four peripheral walls, the upper edges of the two opposite peripheral walls are provided with convex edges, and the other two opposite peripheral walls are provided with reverse buckles.

Furthermore, an avoiding groove is formed in the peripheral wall provided with the inverted buckle, and the inverted buckle is obliquely arranged upwards along the bottom edge of the avoiding groove.

The utility model also relates to a lifting stand column, the arrestment mechanism in inner tube subassembly, outer tube subassembly and the above-mentioned scheme is set up including nested, inner tube subassembly and arrestment mechanism fixed connection still include pipe and lead screw, the pipe sets up in the inner tube subassembly, arrestment mechanism connection motor element is passed through to pipe one end, pipe other end fixedly connected with screw-nut, screw-nut is in inner tube subassembly fixed connection, lead screw one end is passed screw-nut just is located in the pipe, lead screw one end and outer tube subassembly fixed connection.

The beneficial effects of the utility model are that: the friction damping generated by the mounting seat, the connecting piece and the first friction piece of the utility model enables the lifting resistance of the lifting upright post to be nearly consistent, thereby avoiding the shaking caused by the damping difference during starting; the self-locking spring arranged on the braking mechanism has unidirectional self-locking performance, and the self-locking performance of the lifting upright post provided with the braking mechanism can be further improved.

Drawings

The present invention will be further described with reference to the accompanying drawings and embodiments.

Fig. 1 is an assembly view of a first embodiment of the present invention.

Fig. 2 is a longitudinal sectional view of fig. 1 assembled.

Fig. 3 is a schematic structural view of the mounting base in another direction according to the first embodiment of the present invention.

Fig. 4 is an assembly view of the second embodiment of the present invention.

Fig. 5 is a longitudinal cross-sectional view of fig. 4 assembled.

Fig. 6 is an assembly view of the lifting column.

In the figure:

1. an inner pipe component, 3 an outer pipe component, 4 a round pipe, 5 a screw rod, 6 a motor component, 7 a screw rod nut,

21. a connecting member 211, a first spline portion 212, a step portion 213, an intermediate connecting portion 2131, a first cylindrical portion 2132, a non-circular portion 2133, a second cylindrical portion 2134, a locking groove 214, a second spline portion,

22. mounting seat, 221, limiting groove, 222, groove, 223, elastic sheet, 224, avoiding hole, 225, reverse buckle, 226 avoiding groove and 227 convex edge

23. A self-locking spring, 231. A hook,

24. the first friction member, 241, boss, 242, extension, 243, barb,

25. the spring is held tightly by the holding device,

26. a second friction plate is arranged on the first friction plate,

27. a snap spring is arranged on the upper surface of the shell,

28. an elastic member.

Detailed Description

The invention will now be further described with reference to the accompanying drawings. The drawings are simplified schematic diagrams only illustrating the basic structure of the present invention in a schematic manner, and thus show only the components related to the present invention.

Example one

As shown in fig. 1 to 2, the brake mechanism of the present embodiment includes a connecting member 21, a mounting seat 22, and a first friction member 24, where the connecting member 21 includes a first spline portion 211, a step portion 212, an intermediate connection portion 213, and a second spline portion 214, which are sequentially disposed, the second spline portion 214 and the intermediate connection portion 213 both pass through the mounting seat 22, and the step portion 212 abuts against an end surface of the mounting seat 22; the connecting piece 21 can synchronously rotate in a circle relative to the mounting seat 22; the first friction member 24 is sleeved on the intermediate connection portion 213 and does not axially rotate with the intermediate connection portion 213, and the first friction member 24 is directly or indirectly fixed on the mounting seat 22 and is stationary relative to the mounting seat 22.

The brake mechanism of the embodiment further comprises a self-locking spring 23, the self-locking spring has a one-way self-locking performance, the self-locking performance of the brake mechanism can be further improved, the self-locking spring 23 is sleeved on the middle connecting portion 213, and one end of the self-locking spring is fixed on the mounting seat 22, so that the self-locking spring 23 and the mounting seat 22 are relatively static.

As shown in fig. 3, the mounting seat 22 has several peripheral walls, a limiting groove 221 is formed at a corner formed by the two peripheral walls, a hook 231 is convexly formed on the self-locking spring 23, and the hook 231 is embedded in the limiting groove 221. At least one peripheral wall is provided with a groove 222, the first friction member 24 is convexly provided with a boss 241, and the boss 241 is embedded into the groove 222. Referring to fig. 1, the elastic member 223 and the avoiding hole 224 are disposed on two side walls of the groove 222, when the boss 241 is installed in the groove 222, the elastic member 223 is pressed into the avoiding hole 224, and after the boss 241 passes through the elastic member 223, the elastic member 223 resets, so that the first friction member 24 is fixed on the mounting seat 22. Still be equipped with back-off 225 on at least one perisporium of mount pad, still seted up on the perisporium that is equipped with back-off 225 and dodge the groove 226, back-off 225 sets up along dodging the oblique ascending setting in groove 226 base, sets up back-off 225 and dodges the groove 226 for the convenience installs the corresponding position of lift stand.

In addition, the inner ring of the first friction member 24 has an extension 242 and a barb 243 at the end of the extension, the extension 242 is sleeved with the holding spring 25, and the holding spring is held and limited on the first friction member 24 by the barb 243. The extension 242 has equally or unequally spaced cutouts to allow for easier manipulation of the first friction element 24 when mounted on the connecting element 21.

Example two

As shown in fig. 4 to 5, the difference from embodiment 1 is that: the structure of the first friction member 24 is different from that of the first embodiment, no extension part or barb part is provided, an elastic member 28 and a snap spring 27 are further directly or indirectly provided below the first friction member 24 in this embodiment, the elastic member 28 may be a compression spring, a disc spring, a wave spring, etc., and the snap spring 27 forms radial pressure on the first friction member 24. A second friction plate 26 is arranged between the first friction member 24 and the self-locking spring 23 and/or between the first friction member 24 and the elastic member 28, and the second friction plate 26 is axially fixed with the connecting member 21, so that the second friction plate 26 can rotate synchronously with the connecting member 21, and further, a rotating friction force is generated between the second friction plate 26 and the first friction member 24.

The connecting member 21 of the present embodiment is slightly different from the first embodiment, the middle connecting portion 213 of the connecting member 21 includes a first cylindrical portion 2131, a non-circular portion 2132 and a second cylindrical portion 2133, the first friction member 24 and the second friction member 26 are both sleeved on the non-circular portion 2132, an inner hole of the second friction member 26 is adapted to the shape of the outer contour of the non-circular portion 2132, the second cylindrical portion 2133 is provided with a clamping groove 2134, and the clamping spring 27 is arranged in the clamping groove 2134;

wherein, the connection part of the first cylindrical part 2131 and the non-circular part 2132 forms a limit step, and the second friction plate 26 is radially limited between the limit step and the first friction piece 24. The radial length of the non-circular portion 2132 is greater than the thicknesses of the first friction member 24 and the second friction plate 26 and less than the thicknesses of the first friction member 24 and the two second friction plates 26, so as to ensure that the elastic member 25 abuts against the second friction plates 26.

As shown in fig. 6, the lifting column with the brake mechanism of any of the above embodiments includes an inner tube assembly 1 and an outer tube assembly 3 which are nested, and further includes a circular tube 4 and a lead screw 5, the circular tube 4 is disposed in the inner tube assembly 1, at least two ends of the circular tube 4 have internal splines, the internal splines at two ends of the circular tube 4 are respectively matched with the second spline portion 214 of the brake mechanism and the external spline of the lead screw nut 7, the first spline portion 211 of the brake mechanism is connected with the motor assembly 6, the lead screw nut 7 fixed with the outer tube assembly 3 is disposed on the lead screw 5, the lead screw nut 7 has internal threads, the lead screw 5 has external threads matched with the internal threads, and one end of the lead screw 5 is located in the circular tube 4; the other end is fixedly connected with the outer tube component 3.

The loading process comprises the following steps: the screw rod nut 7 is sleeved on the screw rod 5, the screw rod 5 is sleeved in the round tube 4, the round tube 4 is arranged in the inner tube assembly 1, one end of the round tube 4 is connected with the motor assembly 6 through the braking mechanism, the outer tube assembly 3 is sleeved outside the inner tube assembly 1, and finally one end of the screw rod 5 is connected with the outer tube assembly 3.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable people skilled in the art to understand the contents of the present invention and implement the present invention, and the protection scope of the present invention can not be limited thereby, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. A brake mechanism comprising a connecting member (21), a mounting seat (22) and a first friction member (24), characterized in that: the connecting piece (21) comprises a first spline part (211), a step part (212), an intermediate connecting part (213) and a second spline part (214) which are sequentially arranged, the second spline part (214) and the intermediate connecting part (213) penetrate through the mounting seat (22), and the step part (212) abuts against the end face of the mounting seat (22); the first friction piece (24) is sleeved on the middle connecting portion (213), the first friction piece (24) is directly or indirectly fixed on the mounting seat (22), and the first friction piece (24) and the connecting piece (21) do not axially rotate.

2. The brake mechanism of claim 1, wherein: the self-locking spring (23) is sleeved on the middle connecting portion (213), and one end of the self-locking spring (23) is fixed to the mounting seat (22).

3. The brake mechanism of claim 2, wherein: the mounting seat (22) is provided with a plurality of peripheral walls, a limiting groove (221) is formed at the corner formed by the two peripheral walls, the self-locking spring (23) protrudes outwards to form a hook (231), and the hook (231) is embedded into the limiting groove (221).

4. The brake mechanism of claim 1, wherein: the mounting seat (22) is provided with a plurality of peripheral walls, at least one peripheral wall is provided with a groove (222), the outer ring of the first friction piece (24) is provided with a boss (241), and the boss (241) is embedded into the groove (222).

5. The brake mechanism of claim 4, wherein: the anti-collision device is characterized in that elastic sheets (223) and avoiding holes (224) are arranged on two side walls of the groove (222), when the boss (241) is installed in the groove (222), the elastic sheets (223) are pressed into the avoiding holes (224), the boss (241) passes through the elastic sheets (223), and then the elastic sheets (223) reset, so that the first friction piece (24) is fixed on the mounting seat (22).

6. The brake mechanism of claim 1, wherein: the inner ring of the first friction piece (24) is provided with an extension part (242) and a barb (243) located at the end part of the extension part, the extension part (242) is sleeved with a holding spring (25), and the holding spring (25) is held and limited on the first friction piece (24) by the barb (243).

7. The brake mechanism of claim 6, wherein: the extensions (242) have cuts that are equidistantly or non-equidistantly disposed.

8. The brake mechanism of claim 2, wherein: elastic component (28) and jump ring (27) are equipped with in proper order below first friction piece (24), elastic component (28) and jump ring (27) are direct or indirect to first friction piece (24) form radial pressure.

9. The brake mechanism of claim 8, wherein: and a second friction plate (26) is arranged between the first friction piece (24) and the self-locking spring (23) and/or between the first friction piece (24) and the elastic piece (28), and the second friction plate (26) and the connecting piece (21) are axially fixed.

10. The brake mechanism of claim 9, wherein: the middle connecting portion (213) comprises a first cylindrical portion (2131), a non-circular portion (2132) and a second cylindrical portion (2133), the first friction piece (24) and the second friction piece (26) are sleeved on the non-circular portion (2132), an inner hole of the second friction piece (26) is matched with the outer contour shape of the non-circular portion (2132), a clamping groove (2134) is formed in the second cylindrical portion (2133), and the clamping spring (27) is arranged in the clamping groove (2134).

11. The brake mechanism of claim 10, wherein: the joint of the first cylindrical part (2131) and the non-circular part (2132) forms a limiting step, and the second friction plate (26) is radially limited between the limiting step and the first friction piece (24).

12. The brake mechanism of claim 10, wherein: the radial length of the non-circular portion (2132) is greater than the thicknesses of the first friction member (24) and the second friction plate (26) and less than the thicknesses of the first friction member (24) and the two second friction plates (26).

13. The brake mechanism of claim 1, wherein: the mounting seat (22) is provided with four peripheral walls, the upper edges of the peripheral walls at any two opposite sides are provided with convex edges (227), and the peripheral walls at the other two opposite sides are provided with reverse buckles (225).

14. The brake mechanism of claim 13, wherein: be equipped with still seted up on the perisporium of back-off (225) and dodged groove (226), back-off (225) are followed dodge groove (226) base slope and are upwards set up.

15. A lifting column comprising an inner tube assembly (1), an outer tube assembly (3) and a braking mechanism according to any one of claims 1 to 14 in nested arrangement, wherein: inner tube subassembly (1) and arrestment mechanism fixed connection still include pipe (4) and lead screw (5), pipe (4) set up in inner tube subassembly (1), arrestment mechanism connection motor element (6) are passed through to pipe (4) one end, pipe (4) other end fixedly connected with screw-nut (7), screw-nut (7) are in inner tube subassembly (1) fixed connection, lead screw (5) one end is passed screw-nut (7) and are located in pipe (4), lead screw (5) one end and outer tube subassembly (3) fixed connection.