CN212088875U

CN212088875U - Locking mechanism suitable for limiting movement of revolute pair

Info

Publication number: CN212088875U
Application number: CN202020736311.5U
Authority: CN
Inventors: 赵吉强; 苟华刚; 惠海岗; 辛艺
Original assignee: Chongqing Yanfeng Adient Automotive Components Co Ltd
Current assignee: Chongqing Adient Automotive Components Co Ltd
Priority date: 2020-05-07
Filing date: 2020-05-07
Publication date: 2020-12-08
Anticipated expiration: 2030-05-07

Abstract

The utility model discloses a locking mechanism suitable for restrict revolute pair motion, including fixing base and the moving part that can rotate relative to this fixing base, the moving part has curved internal tooth portion, has locking part through elastic element movable mounting on the fixing base, has the external tooth portion that matches with the internal tooth portion on this locking part, and the elastic element exerts the elasticity to locking part, makes external tooth portion and internal tooth portion keep meshing to restrict the moving part and rotate; the locking mechanism further comprises an operating member which can pivot relative to the fixed seat to operate the locking component to overcome the elastic force of the elastic element to separate the external teeth from the internal teeth, and the operating member is set to be suitable for being operated by the inhaul cable. The utility model has the advantages that: the locking mechanism can be applied to a revolute pair movement mechanism such as seat backrest inclination adjustment and has the technical advantages of high locking strength, good locking reliability and convenience in unlocking and controlling.

Description

Locking mechanism suitable for limiting movement of revolute pair

Technical Field

The utility model relates to a locking device, concretely relates to locking mechanical system suitable for restriction revolute pair motion.

Background

The revolute pair is also called as rotary pair, belongs to one of kinematic pairs, and means that two components are allowed to rotate relatively around a common axis in a mechanism, and the revolute pair is widely applied in the fields of life, industry and the like.

In the case of a revolute pair mechanism, in some specific cases it is necessary to limit the relative rotation of the two members so that they maintain a fixed included angle, and locking means are required. Such as a door lock for limiting the rotation of a door, a recliner for limiting the rotation of a seat back, etc., in the prior art, these locking devices have advantages and disadvantages, and have high strength requirements for the angle adjustment of office seats, etc., and in a revolute pair with limited operation space, there are few selectable conventional locking mechanisms, and the technical defects of low locking strength and inconvenience in unlocking and operation are generally existed.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a locking mechanism suitable for restriction revolute pair motion to solve among the prior art technical defect that single structure, locking intensity are low, be not convenient for the unblock to control.

In order to achieve the above purpose, the utility model discloses technical scheme as follows:

the utility model provides a locking mechanism suitable for restriction revolute pair moves, includes fixing base and can be for this fixing base pivoted moving part, its key lies in: the moving part is provided with an arc-shaped internal tooth part, the fixed seat is movably provided with a locking part through an elastic element, the locking part is provided with an external tooth part matched with the internal tooth part, and the elastic element exerts elastic force on the locking part to keep the external tooth part meshed with the internal tooth part so as to limit the rotation of the moving part; the locking mechanism further comprises an operating member which can pivot relative to the fixed seat to operate the locking component to overcome the elastic force of the elastic element to separate the external teeth from the internal teeth, and the operating member is set to be suitable for being operated by the inhaul cable.

By adopting the structure, the locking mechanism can be applied to a revolute pair movement mechanism such as seat backrest inclination angle adjustment and has the technical advantages of high locking strength, good locking reliability and convenience in unlocking and controlling.

Preferably, the method comprises the following steps: the locking mechanism comprises a fixed seat, a movable locking column, an elastic element, a locking part and a positioning structure group, wherein the fixed seat is provided with a mounting hole, the movable locking column is movably mounted in the mounting hole, the elastic element is supported at the lower end of the movable locking column, the locking part is movably assembled at the upper end of the movable locking column, the positioning block is distributed at the circumference of the movable locking column, the upper end of the positioning block is provided with a first inclined surface, the lower end of the locking part is provided with a second inclined surface which is in sliding butt joint with the first inclined surface, the circumference of the locking part is provided with a guide block which protrudes outwards along the radial direction, the inner wall of the mounting hole is distributed with a positioning structure group which protrudes inwards along the radial direction, a sliding groove is arranged between every two adjacent positioning structure groups, the guide block is slidably mounted in the sliding groove, the positioning structure group; in the locking state, the positioning block is positioned in the sliding groove, the elastic element applies force combined with the moving part to the locking part through the movable locking column, and in the unlocking process, the operating component controls the locking part to move downwards and drives the first inclined surface to slide to the locking inclined surface so as to block the elastic element from applying force to the locking part.

By adopting the structure, in practical application, the moving part is fixed on the rotating part of the rotating pair, the fixed seat is fixed on the fixed part of the rotating pair, the guide block and the positioning block are both positioned in the sliding groove in a locking state, and the upper end of the locking part is propped against the moving part under the action of upward elastic force exerted by the elastic element to limit the rotation of the moving part, so that the locking of the rotating pair is realized. When the unlocking is needed, the first inclined surface can slide to the locking inclined surface by pressing the locking component downwards again, so that the elastic element is blocked to apply force to the locking component, the locking component is separated from the moving component, and the unlocking of the revolute pair is realized.

Preferably, the method comprises the following steps: the moving part is of an arc-shaped plate-shaped structure, and the inner tooth part and the outer tooth part are distributed in an arc shape. With the above configuration, the locking force for restricting the rotation of the moving member can be further increased.

Preferably, the method comprises the following steps: the operating component is provided with a rotating hole, a traction hole and a pressing groove, the locking component is provided with a guide column located in the pressing groove, and a traction rope is connected in the traction hole. By adopting the structure, the control component is rotatably arranged on the fixed part in the revolute pair through the rotary hole, and then the control component is dragged by the traction rope to rotate around the rotary hole, so that the pressing groove can press the guide post downwards, and the pressing operation of the locking component is realized.

Preferably, the method comprises the following steps: the upper side of the operating component is provided with a traction rope through groove. Adopt above-mentioned structure to the haulage rope of installation.

Preferably, the method comprises the following steps: the lower end of the locking component is provided with a circular hole, the upper end of the movable lock cylinder is provided with a connecting column, and the connecting column is assembled in the circular hole in a sliding mode. By adopting the structure, the movable lock cylinder can slide up and down relative to the locking component and can rotate relative to the locking component.

Compared with the prior art, the beneficial effects of the utility model are that:

adopt the utility model provides a locking mechanism suitable for restriction revolute pair motion can use in revolute pair motion such as backrest inclination adjusts, has that locking intensity is high, locking good reliability and the unblock of being convenient for is controlled technical advantage.

Drawings

FIG. 1 is a schematic structural view of a locking mechanism;

FIG. 2 is an exploded view of the fixed base, the resilient member, the movable lock cylinder and the locking member;

FIG. 3 is a sectional view of the holder;

FIG. 4 is a schematic structural view of the locking member;

FIG. 5 is a schematic view of the structure of the moving part;

FIG. 6 is a schematic structural view of the manipulating member;

fig. 7 is a reference view showing a use state of the locking mechanism applied to the seat (the backrest and the seat plate are in an exploded state).

Detailed Description

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

The present embodiment will be described by taking an example in which the lock mechanism is applied to a back rest tilt angle adjustment system of an office chair.

As shown in fig. 1 and 2, a locking mechanism suitable for limiting the movement of a revolute pair comprises the following main components: the locking mechanism comprises a moving part 1, a locking part 2, a fixed seat 3, an elastic element 3e, an operating member 3c and a movable lock cylinder 3b, wherein one end of the locking part 2 close to the moving part 1 is provided with an external tooth part 2c, the moving part 1 is provided with an internal tooth part 1a corresponding to the external tooth part 2c, and the operating member 3c can control the locking part 2 to approach or separate towards the moving part 1 so that the external tooth part 2c is combined with or separated from the internal tooth part 1a, thereby forming locking or unlocking.

As shown in fig. 2 to 6, the fixing base 3 is provided with a mounting hole 3a1, the lower end of the movable lock cylinder 3b is slidably assembled in the mounting hole 3a1 through an elastic element 3e, the upper end of the movable lock cylinder 3b is provided with a connecting column 3b3, the lower end of the locking member 2 is provided with a circular hole 2e, the connecting column 3b3 is slidably assembled in the circular hole 2e, positioning blocks 3b1 protruding radially outward are distributed on the circumference of the movable lock cylinder 3b, the upper end of the positioning block 3b1 is provided with a first inclined surface 3b2, the lower end of the locking member 2 is provided with a second inclined surface 2a in sliding contact with the first inclined surface 3b2, guide blocks 2b protruding radially outward are distributed on the circumference of the locking member 2, positioning structure groups 3a2 protruding radially inward are distributed on the inner wall of the mounting hole 3a1, a sliding groove 3a3 is arranged between two adjacent positioning structure groups 3a2, in the locking state, the positioning blocks 1 and the guiding blocks 3b3 are both positioned in, in the unlocked state, only the guide block 2b is located in the slide groove 3a3, the positioning structure group 3a2 includes a locking portion 3a4 and an unlocking portion 3a5, the lower end of the locking portion 3a4 is provided with a locking inclined surface 3a6 extending obliquely to the side wall of the unlocking portion 3a5, and the lower end of the unlocking portion 3a5 is provided with an unlocking inclined surface 3a7 extending obliquely to the slide groove 3a 3.

As shown in fig. 7, when the locking mechanism is applied to an office chair, the backrest B is pivotally connected to the seat plate a, and the inclination of the backrest B can be adjusted. The moving part 1 of the locking mechanism is fixed on the backrest B, and the fixed seat 3 is fixed on the seat board A. When the backrest B is in a locked state, the guide block 2B and the positioning block 3B1 are both positioned in the sliding groove 3a3, the elastic force exerted upwards by the elastic element 3e drives the movable lock cylinder 3B and the locking part 2 to move upwards, so that the upper end of the locking part 2 is pressed against the moving part 1, the external tooth part 2c is combined with the internal tooth part 1a, the moving part 1 cannot rotate relative to the locking part 2, the backrest B is locked, and the included angle between the backrest B and the seat plate A is kept fixed. When the backrest B inclination angle needs to be unlocked and adjusted, the locking part 2 can be controlled to move downwards through the operating member 3c, in the process of the downward movement of the locking part 2, the second inclined surface 2a abuts against the first inclined surface 3B2, and pushes the movable lock cylinder 3B to slide downwards in the mounting hole 3a1, when the first inclined surface 3B2 slides to the position of the locking inclined surface 3a6, due to the inclined cooperation effect of the second inclined surface 2a and the first inclined surface 3B2, the movable lock cylinder 3B rotates, so that the first inclined surface 3B2 slides to the locking inclined surface 3a6, at this time, the movable lock cylinder 3B cannot move upwards, so as to block the elastic element 3e from applying force to the locking part 2, the external tooth part 2c is not combined with the internal tooth part 1a, that is the separation of the locking part 2 from the moving part 1 is completed, and the unlocking of the backrest B is realized. Based on the principle, when the backrest B needs to be locked again, the locking member 2 can be continuously pressed to move downwards, the second inclined surface 2a firstly pushes the first inclined surface 3B2 to slide to the position of the unlocking inclined surface 3a7, then the movable lock cylinder 3B rotates, the positioning block 3B1 slides into the sliding groove 3a3 again through the unlocking inclined surface 3a7, and the elastic element 3e enables the upper end of the locking member 2 to be propped against the moving member 1 again, so that the backrest B is locked again.

Further, as shown in fig. 1 and 6, in order to control the locking part 2 to move downward, the operating member 3c is provided with a rotation hole 3c1, a pulling hole 3c2 and a pressing groove 3c3, the locking part 2 is provided with a guide post 2d located in the pressing groove 3c3, a pulling rope 3d is connected in the pulling hole 3c2, the operating member 3c is rotatably installed at the lower side of the seat plate a through the rotation hole 3c1, and then the operating member 3c is pulled by the pulling rope 3d to rotate around the rotation hole 3c1, so that the pressing groove 3c3 can press the guide post 2d downward, thereby realizing the pressing operation of the locking part 2. To facilitate the installation of the traction rope 3d, the upper side of the operating member 3c is provided with a traction rope passing groove 3c 4.

In order to further improve the locking force for limiting the rotation of the backrest B, the moving component 1 is of an arc-shaped plate-shaped structure, and the inner tooth part 1a and the outer tooth part 2c are distributed in an arc shape.

Finally, it should be noted that the above description is only a preferred embodiment of the present invention, and those skilled in the art can make various similar representations without departing from the spirit and the scope of the present invention.

Claims

1. A locking mechanism suitable for limiting the movement of a revolute pair comprises a fixed seat (3) and a moving part (1) which can rotate relative to the fixed seat (3), and is characterized in that: the moving part (1) is provided with an arc-shaped inner tooth part (1a), the fixed seat (3) is movably provided with a locking part (2) through an elastic element (3e), the locking part (2) is provided with an outer tooth part (2c) matched with the inner tooth part (1a), and the elastic element (3e) exerts elastic force on the locking part (2) to enable the outer tooth part (2c) to be kept meshed with the inner tooth part (1a) so as to limit the moving part (1) to rotate;

the locking mechanism further comprises an operating member (3c), the operating member (3c) can pivot relative to the fixed seat (3) to operate the locking component (2) to overcome the elastic force of the elastic element (3e) and separate the external tooth part (2c) from the internal tooth part (1a), and the operating member (3c) is set to be suitable for being operated by a cable.

2. The lock mechanism of claim 1 adapted to limit the movement of a revolute pair, wherein: the locking device is characterized in that a mounting hole (3a1) is formed in the fixing seat (3), a movable lock column (3b) is movably mounted in the mounting hole (3a1), an elastic element (3e) is supported at the lower end of the movable lock column (3b), the locking component (2) is movably assembled at the upper end of the movable lock column (3b), positioning blocks (3b1) are distributed at the circumference of the movable lock column (3b), first inclined planes (3b2) are arranged at the upper end of the positioning blocks (3b1), a second inclined plane (2a) which is in sliding butt joint with the first inclined planes (3b2) is arranged at the lower end of the locking component (2), guide blocks (2b) which protrude outwards in the radial direction are distributed at the circumference of the locking component (2), positioning structure groups (3a2) which protrude inwards in the radial direction are distributed on the inner wall of the mounting hole (3a1), and a sliding groove (3a3) is arranged between every two adjacent positioning structure, the guide block (2b) is slidably mounted in the sliding groove (3a3), the positioning structure group (3a2) comprises a locking part (3a4) and an unlocking part (3a5), the lower end of the locking part (3a4) is provided with a locking inclined surface (3a6) obliquely extending to the side wall of the unlocking part (3a5), and the lower end of the unlocking part (3a5) is provided with an unlocking inclined surface (3a7) obliquely extending to the sliding groove (3a 3);

in the locking state, the positioning block (3b1) is positioned in the sliding groove (3a3), the elastic element (3e) applies force combined with the moving part (1) to the locking part (2) through the movable lock column (3b), and in the unlocking process, the operating member (3c) controls the locking part (2) to move downwards and drives the first inclined surface (3b2) to slide onto the locking inclined surface (3a6) so as to block the elastic element (3e) from applying force to the locking part (2).

3. The lock mechanism of claim 2 adapted to limit the movement of the revolute pair, wherein: the moving part (1) is of an arc-shaped plate-shaped structure, and the inner tooth part (1a) and the outer tooth part (2c) are distributed in an arc shape.

4. The lock mechanism adapted to restrict the movement of a revolute pair according to claim 1, 2 or 3, wherein: the operating component (3c) is provided with a rotating hole (3c1), a traction hole (3c2) and a pressing groove (3c3), the locking part (2) is provided with a guide column (2d) positioned in the pressing groove (3c3), and the traction hole (3c2) is internally connected with a traction rope (3 d).

5. The lock mechanism of claim 4 adapted to limit the movement of the revolute pair, wherein: the upper side of the operating component (3c) is provided with a traction rope through groove (3c 4).

6. The lock mechanism adapted to restrict the movement of a revolute pair according to claim 2 or 3, wherein: the lower end of the locking component (2) is provided with a circular hole (2e), the upper end of the movable lock cylinder (3b) is provided with a connecting column (3b3), and the connecting column (3b3) is slidably assembled in the circular hole (2 e).