CN116326918A

CN116326918A - Self-locking mechanism and hand-operated lifting table

Info

Publication number: CN116326918A
Application number: CN202111583065.XA
Authority: CN
Inventors: 黄立先; 刘涛; 朱更兴
Original assignee: Changzhou Kaidi Electrical Co Ltd
Current assignee: Changzhou Kaidi Electrical Co Ltd
Priority date: 2021-12-22
Filing date: 2021-12-22
Publication date: 2023-06-27

Abstract

The invention relates to a self-locking mechanism and a hand-operated lifting table, which comprises a rocking handle, a transmission rod and a self-locking device, wherein the self-locking device comprises a first locking block, a second locking block and a limiting roller arranged between the first locking block and the second locking block, the transmission rod sequentially passes through the first locking block, the limiting roller and the second locking block and then is connected with the rocking handle in a matched manner so as to realize synchronous rotation of the transmission rod, the limiting roller and the rocking handle, a limiting block is arranged at the side of the limiting roller and can be clamped into or separated from the limiting roller, and the limiting block is clamped into the limiting roller so as to limit the circular motion of the limiting roller. A hand-operated lifting table comprises the self-locking mechanism. The self-locking mechanism has the advantages of simple structure, convenient processing and low manufacturing cost, and is compatible with operation safety and convenience. When a user operates, the rocking handle is pulled out after the table rises to the use height, so that the rocking handle is separated from the self-locking device, self-locking can be realized, and the stability of the lifting table is ensured.

Description

Self-locking mechanism and hand-operated lifting table

Technical Field

The invention relates to the technical field of lifting tables, in particular to a self-locking mechanism and a hand-operated lifting table.

Background

Along with the continuous improvement of the living standard of people, the demands on the lifting table are also increasing. The hand-operated lifting table with simple structure and high cost performance is favored by more people. However, the hand-operated lifting table only changes the rotation of the rocking handle into lifting movement of the table top through the gear box, and has no function of automatic locking after lifting is completed. This results in a limited load carrying capacity of the table top and the inability to place weights which would otherwise easily lead to the table top slipping down.

Disclosure of Invention

The invention aims to solve the technical problems that: overcomes the defects of the prior art and provides a self-locking mechanism and a hand-operated lifting table.

The technical scheme adopted for solving the technical problems is as follows:

on the one hand, a self-locking mechanism, including rocking handle, transfer line, self-locking device includes first latch segment, second latch segment and is located spacing gyro wheel between the two, the transfer line passes behind first latch segment, spacing gyro wheel, the second latch segment in proper order and is connected with the rocking handle cooperation and then realize the synchronous rotation of transfer line, spacing gyro wheel and rocking handle, the stopper is installed to the side of spacing gyro wheel, the stopper can block into or break away from spacing gyro wheel, the stopper block into spacing gyro wheel is with the circular motion of restriction spacing gyro wheel.

Preferably, the limiting roller is arranged in an installation cavity formed by the first locking block and the second locking block relatively, the limiting block is arranged in a notch formed by the first locking block and the second locking block relatively, the limiting block is positioned in a notch at one side of the limiting roller, and the limiting block can slide in the notch.

Preferably, a side wall hole is formed in the side wall of the limiting block, and an elastic piece is arranged between the side wall hole and the side wall of the notch.

Preferably, the side wall of the limiting block facing the limiting roller is provided with a convex hull, the circumferential surface of the limiting roller is provided with a plurality of roller tooth grooves for the convex hull to be clamped in or separated from, and the roller tooth grooves are formed between adjacent roller teeth.

Preferably, the front wall of the limiting block is provided with a bent clamping strip, and the end face of the clamping strip, which faces the transmission rod, is provided with an inclined surface, so that the limiting block is separated from the limiting roller when the rocking handle is inserted into the inner end of the inclined surface, and the limiting block is clamped into the limiting roller when the rocking handle is pulled out of the outer end of the inclined surface.

Preferably, two symmetrically arranged limiting blocks are arranged at the side of the limiting roller, and the clamping strips of the two limiting blocks relatively form a trapezoid gap with a large front part and a small back part, and the trapezoid gap is convenient for inserting a rocking handle.

Preferably, the shaft end face of the transmission rod is polygonal, and the limit roller is provided with a polygonal hole matched with the shaft end face of the transmission rod.

Preferably, the axle journals at the front side and the rear side of the limiting roller are respectively matched with the second locking central hole of the second locking block and the first locking central hole of the first locking block, one side, facing the rocking handle, of the second locking block is provided with an accommodating groove capable of enabling the clamping strip to move inside, and the first locking block is connected with the second locking block through a fastener.

On the other hand, a hand-operated lifting table comprises the self-locking mechanism.

Preferably, the hand-operated lifting table comprises a table plate and a table top support arranged below the table plate. The self-locking device can be arranged on the desktop bracket. The desktop bracket is used for limiting the axial movement of the self-locking device.

The beneficial effects of the invention are as follows: the invention has reliable structure and no complex structures such as overturn, friction, compaction and the like. The self-locking mechanism has the advantages of simple structure, convenient processing and low manufacturing cost, and is compatible with operation safety and convenience. When a user operates, the rocking handle can be matched with the transmission rod, at the moment, the limiting block is separated from the limiting roller, and the hand-operated lifting table can realize lifting action through the action of the rocking handle; when the table rises to the use height, the rocking handle is pulled out, and the limiting block is clamped into the limiting roller, so that the self-locking device can realize self locking, and the stability of the lifting table is ensured.

Drawings

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

FIG. 1 is a schematic diagram of the self-locking mechanism of the present invention;

FIG. 2 is an exploded schematic view of the self-locking mechanism of the present invention;

FIG. 3 is a schematic view of A-A of FIG. 1;

FIG. 4 is a schematic view of the structure of the first locking block;

FIG. 5 is a schematic view of the stopper;

FIG. 6 is a schematic view of the self-locking mechanism of the present invention in a self-locking state;

FIG. 7 is a schematic illustration of the self-locking mechanism of the present invention in an unlocked state;

fig. 8 is a schematic structural view of a hand-operated lifting table comprising the self-locking mechanism.

Wherein, 1, a transmission rod, 2, a self-locking device, 21, a first locking block, 211, a notch, 212, an installation cavity, 22, a limit roller, 221, roller teeth, 222, roller tooth grooves, 223 and a shaft neck, 23, elastic pieces, 24, limiting blocks, 241, side wall holes, 242, clamping strips, 243, convex hulls, 2421, inclined planes, 25, second locking blocks, 3, rocking handles, 4, fastening pieces, 8 and a tabletop support.

Detailed Description

The invention will now be further described with reference to the accompanying drawings. These drawings are simplified schematic views illustrating the basic structure of the present invention by way of illustration only, and thus show only the constitution related to the present invention.

As shown in fig. 1 to 7, a self-locking mechanism comprises a rocking handle 3, a transmission rod 1 and a self-locking device 2, wherein the self-locking device 2 comprises a first locking block 21, a second locking block 25 and a limiting roller 22 arranged between the first locking block 21 and the second locking block 25, the transmission rod 1 sequentially passes through the first locking block 21, the limiting roller 22 and the second locking block 25 and then is connected with the rocking handle 3 in a matched manner so as to realize synchronous rotation of the transmission rod 1, the limiting roller 22 and the rocking handle 3, a limiting block 24 is arranged at the side of the limiting roller 22, the limiting block 24 can be clamped into or separated from the limiting roller 22, and the limiting block 24 is clamped into the limiting roller 22 so as to limit the circular motion of the limiting roller 22.

Preferably, the limiting roller 22 is installed in an installation cavity 212 formed by the first locking block 21 and the second locking block 25 opposite to each other, the limiting block 24 is installed in a notch 211 formed by the first locking block 21 and the second locking block 25 opposite to each other, and the limiting block 24 can slide in the notch 211.

Preferably, a sidewall hole 241 is formed on the sidewall of the limiting block 24, and an elastic member 23 is installed between the sidewall hole 241 and the sidewall of the slot 211, and preferably, the elastic member 23 may be a cylindrical spring or a compression spring. The elastic member 23 is partially inserted into the sidewall hole 241 of the stopper 24, the stopper 24 is put into the notch 211 together with the elastic member 23, and the notch 211 restricts the movement of the stopper 24 in a partial direction, allowing only the forward and backward movement thereof in the axial direction of the elastic member 23.

Preferably, the side wall of the limiting block 24 facing the limiting roller 22 has a convex hull 243, the circumferential surface of the limiting roller 22 is provided with a plurality of roller tooth grooves 222 for the convex hull 243 to be clamped in or separated from, and the roller tooth grooves 222 are formed between adjacent roller teeth 221.

Preferably, the front wall of the limiting block 24 is provided with a bent clamping bar 242, the end surface of the clamping bar 242 facing the transmission rod 1 is provided with an inclined surface 2421, so that the limiting block 24 is separated from the limiting roller 22 when the rocking handle 3 is inserted into the inner end of the inclined surface 2421, and the limiting block 24 is clamped into the limiting roller 22 when the rocking handle 3 is pulled out of the outer end of the inclined surface 2421.

Preferably, two symmetrically arranged limiting blocks 24 are installed at the side of the limiting roller 22, and the clamping strips 242 of the two limiting blocks 24 relatively form a trapezoid gap with a large front part and a small back part, which is convenient for inserting the rocking handle 3. The clamping strips 242 on the limiting block 24 are of a front large and rear small structure, so that trapezoid gaps are formed, the rocking handle 3 is inserted from the big end, and the rocking handle has a guiding function, so that the installation is simpler and more convenient and labor-saving.

Preferably, the axial end surface of the transmission rod 1 is polygonal, such as hexagonal, and the limit roller 22 is provided with a polygonal hole, such as a hexagonal hole, matched with the axial end surface of the transmission rod 1. The transmission rod 1 passes through the hexagonal hole of the limit roller 22 and is inserted into and connected with the rocking handle 3, so that the synchronous rotation of the transmission rod 1, the limit roller 22 and the rocking handle 3 can be realized.

Preferably, the journals 223 on the front side and the rear side of the limit roller 22 are respectively matched with the second locking central hole of the second locking block 25 and the first locking central hole of the first locking block 21, one side of the second locking block 25 facing the rocking handle 3 is provided with a containing groove 251 which can enable the clamping strip 242 to move inside, and the first locking block 21 and the second locking block 25 are connected by the fastening piece 4. Through the structure, the limit roller 22 can be rotatably supported and matched with the first locking block 21 and the second locking block 25.

As shown in fig. 8, a hand-operated lifting table comprises the self-locking mechanism. The hand-operated lifting table comprises a table plate 7 and a table top support 8 positioned below the table plate, the self-locking device 2 is also positioned below the table plate 7, and a first locking block or a second locking block of the self-locking device 2 can be arranged on the table top support 8, and the table top support 8 limits the axial movement of the self-locking device.

As shown in fig. 6, the self-locking state: in the initial condition, the elastic member 23 is in a pre-compressed state, at this time, the rocking handle 3 is pulled out towards the outer end of the inclined plane 2421, and the limiting block 24 clamps the convex hull 243 of the elastic member 23 into the roller tooth socket 222 of the limiting roller 22 under the compression force of the elastic member 23, so that the limiting blocks 24 on both sides are in the same state. The limiting blocks 24 on the two sides cannot move in the circumferential direction, so that the circumferential rotation of the limiting roller 22 is limited. Because the limit roller 22 and the transmission rod 1 move synchronously in the circumferential direction, the transmission rod 1 cannot rotate in the circumferential direction, and the up-and-down movement of the hand-operated lifting table is finally limited, so that the self-locking after the lifting and positioning of the hand-operated lifting table is realized.

As shown in fig. 7, the unlocked state: the rocking handle 3 cooperates with the transfer line 1, and rocking handle 3 inserts along the axis direction of transfer line 1, and at this moment rocking handle 3 inserts towards the inner of inclined plane 2421, and rocking handle 3 acts on the card strip 242 of stopper 24, and stopper 24 receives thrust removal, further compresses elastic component 23, and the convex closure 243 of stopper 24 can withdraw from the gyro wheel tooth groove 222 of spacing gyro wheel 22 simultaneously to spacing gyro wheel 22 can free rotation, rotates rocking handle 3 at this moment and can make spacing gyro wheel 22 circumference rotate, and then makes transfer line 1 synchronous rotation.

By arranging the shaft neck 223 on the limit roller 22, during installation, only the shaft neck 223 of the limit roller 22 is directly inserted into the first locking central hole of the first locking block 21 and the first locking central hole of the second locking block 25, and unnecessary accessories are not needed, so that the installation is simpler and more convenient. The first locking block 21 and the second locking block 25 have the same structure, and only one pair of dies is required to be produced during die processing, so that the cost can be saved; meanwhile, the assembly of the production line is convenient.

The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and to implement the same, but are not intended to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.

Claims

1. The utility model provides a self-locking mechanism, includes rocking handle (3), transfer line (1), self-locking device (2), its characterized in that: the self-locking device (2) comprises a first locking block (21), a second locking block (25) and a limiting roller (22) arranged between the first locking block and the second locking block, wherein the transmission rod (1) sequentially passes through the first locking block (21), the limiting roller (22) and the second locking block (25) and then is connected with the rocking handle (3) in a matched manner, so that synchronous rotation of the transmission rod (1), the limiting roller (22) and the rocking handle (3) is realized, a limiting block (24) is arranged at the side of the limiting roller (22), the limiting block (24) can be blocked into or separated from the limiting roller (22), and the limiting block (24) is blocked into the limiting roller (22) so as to limit the circular motion of the limiting roller (22).

2. A self-locking mechanism according to claim 1, wherein: the limiting roller (22) is arranged in an installation cavity (212) formed by the first locking block (21) and the second locking block (25) relatively, the limiting block (24) is arranged in a notch (211) formed by the first locking block (21) and the second locking block (25) relatively, and the limiting block (24) can slide in the notch (211).

3. A self-locking mechanism according to claim 2, wherein: the side wall of the limiting block (24) is provided with a side wall hole (241), and an elastic piece (23) is arranged between the side wall hole (241) and the side wall of the notch (211).

4. A self-locking mechanism according to claim 1, wherein: the side wall of the limiting block (24) facing the limiting roller (22) is provided with a convex hull (243), the circumferential surface of the limiting roller (22) is provided with a plurality of roller tooth grooves (222) which can be used for clamping or separating the convex hull (243), and the roller tooth grooves (222) are formed between adjacent roller teeth (221).

5. A self-locking mechanism according to any one of claims 1-4, wherein: the front wall of the limiting block (24) is provided with a bent clamping strip (242), the end face of the clamping strip (242) facing the transmission rod (1) is provided with an inclined surface (2421), so that the limiting block (24) is separated from the limiting roller (22) when the rocking handle (3) is inserted into the inner end of the inclined surface (2421), and the limiting block (24) is pulled out of the rocking handle (3) towards the outer end of the inclined surface (2421) to be clamped into the limiting roller (22).

6. The self-locking mechanism of claim 5, wherein: two symmetrically arranged limiting blocks (24) are arranged at the side of the limiting roller (22), and clamping strips (242) of the two limiting blocks (24) relatively form a trapezoid gap with a large front part and a small back part, and the trapezoid gap is convenient for inserting the rocking handle (3).

7. A self-locking mechanism according to claim 1, wherein: the shaft end face of the transmission rod (1) is polygonal, and the limit roller (22) is provided with a polygonal hole matched with the shaft end face of the transmission rod (1).

8. A self-locking mechanism according to claim 1, wherein: the axle journals (223) at the front side and the rear side of the limiting roller (22) are respectively matched with a second locking central hole of a second locking block (25) and a first locking central hole of a first locking block (21), one side, facing towards the rocking handle (3), of the second locking block (25) is provided with a containing groove (251) capable of enabling a clamping strip (242) to move inside, and the first locking block (21) and the second locking block (25) are connected through a fastening piece (4).

9. A hand lift table, its characterized in that: comprising a self-locking mechanism according to any one of claims 1-8.

10. The hand-operated lift table of claim 9, wherein: comprises a table board (7) and a table top bracket (8) positioned below the table board.