WO2021082777A1

WO2021082777A1 - Rocker arm device

Info

Publication number: WO2021082777A1
Application number: PCT/CN2020/115334
Authority: WO
Inventors: 肖珊珊; 扈钧; 谢超群; 雷文斌
Original assignee: 深圳市科曼医疗设备有限公司
Priority date: 2019-10-29
Filing date: 2020-09-15
Publication date: 2021-05-06
Also published as: CN110748759B; CN110748759A

Abstract

A rocker arm device. The rocker arm device comprises a base (1), a rocker arm (2), and a tray (3), one end of the rocker arm is hingedly connected to the base by means of a first mounting shaft (L1), and the other end of the rocker arm is hingedly connected to the tray by means of a second mounting shaft (L2). The rocker arm device further comprises: a reciprocating motion assembly (4), provided on the side, close to the tray, of the rocker arm by means of a rotating shaft (L0), and reciprocating along with rotation of the rotating shaft; and an air spring (5), comprising a fixing portion (51), a telescopic portion (52), and an ejector pin (53) which are sequentially connected, wherein the fixing portion is hingedly connected to the base by means of a third mounting shaft (L3), the telescopic portion is fixed on the rocker arm, and the reciprocating motion assembly acts on the ejector pin and is used for locking or unlocking the gas spring. The locking and unlocking operations of the rocker arm device can refer to a distal end and a proximal end of the reciprocating motion assembly for precise control, the operation is convenient, and the supporting force of the gas spring is stable and reliable.

Description

Rocker device

Technical field

This application relates to the technical field of mechanical installation, in particular to a rocker arm device.

Background technique

A rocker device, as shown in Fig. 1, generally includes a base 1, a rocker 2, and a tray 3 that are hinged in sequence. The base plays a fixed role, such as being fixed on a wall, and the tray is used to carry items such as TVs and monitors. The object can be adjusted to a suitable height by adjusting the rotation angle of the rocker arm. The existing rocker arm adjusting structure includes an adjusting rod 4A, an adjusting sleeve 4B fixed on the rocker arm 2, and a locking bolt 4C. One end of the adjusting rod 4A is hinged on the base 1, and the other end is sleeved on the base 1. On the adjusting sleeve 4B, a locking bolt 4C is used to lock and fix the adjusting rod 4A and the adjusting sleeve 4B.

When the inclination angle of the rocker arm 2 needs to be adjusted, the locking bolt 4C is loosened, and after the rocker arm 2 is rotated to the target position, the locking bolt 4C is tightened to lock the adjusting rod 4A, and the adjusting rod 4A plays a supporting role.

technical problem

With this kind of rocker arm device, when adjusting the inclination angle of the rocker arm 2, by loosening and tightening the bolts, the degree of tightness is completely dependent on the feeling, which is very inconvenient, and the overall structure is not stable enough, and it may shake after being locked. Therefore, the existing technology needs to be improved.

Technical solutions

The technical problem to be solved by this application is to provide a rocker arm device, which aims to solve the problem of inconvenient operation of the existing rocker arm device and easy shaking after locking.

In order to solve the above technical problems, this application implements a rocker arm device, which includes a base, a rocker arm, and a tray. One end of the rocker arm is hinged to the base through a first mounting shaft, and the other end passes through a first mounting shaft. The second mounting shaft is hinged on the tray, and further includes:

The reciprocating movement assembly is arranged on the side of the rocker arm close to the tray through a rotating shaft, and performs reciprocating motion with the rotation of the rotating shaft;

The gas spring includes a fixed part, a telescopic part, and a thimble connected in sequence, the fixed part is hinged with the base through a third mounting shaft, the telescopic part is fixed on the rocker arm, and the reciprocating component acts On the thimble, it is used to lock or unlock the gas spring;

Wherein, the first installation shaft, the second installation shaft, the rotation shaft and the third installation shaft are arranged in parallel.

Further, the rocker arm device further includes:

The U-shaped guide block is provided with a mounting hole transversely penetrating the two side walls and a guide through hole longitudinally penetrating the bottom. The rotating shaft penetrates the mounting hole and is rotatable relative to the U-shaped guide block. The reciprocating movement assembly Facing the guide through hole;

The telescopic part passes through the guide through hole and abuts on the guide through hole through a shaft shoulder.

Further, the rocker arm device further includes:

The sleeve has two ends fixed on the rocker arm, and a second through hole is opened on the sleeve wall facing the guide through hole in the middle; the U-shaped guide block is fixed on the sleeve through the mounting hole on;

The rotating shaft is rotatably sleeved in the sleeve relative to the sleeve, and the reciprocating assembly is located in the sleeve and acts on the thimble of the gas spring through the second through hole.

Further, the reciprocating motion component is an eccentric wheel component or a crank slider component.

Further, the eccentric wheel assembly includes:

The eccentric wheel is fixed on the rotating shaft;

The bearing is sleeved on the eccentric wheel; the thimble of the gas spring abuts on the circumferential surface of the bearing.

Further, the crank slider assembly includes:

The connecting rod is hinged on the rotating shaft;

The sliding block is hinged on the end of the connecting rod; the thimble of the gas spring abuts on the sliding block.

Further, one end of the slider close to the gas spring is provided with a blind hole, and the thimble of the gas spring abuts in the blind hole.

Further, the rocker arm device further includes:

The rotating wrench is arranged at one end of the rotating shaft and located on the outer side of the rocker arm, and is used to rotate the rotating shaft.

Further, the rocker arm device further includes:

The wrench limit piece is fixed on the outer side of the rocker arm and is located between the rocker arm and the rotating wrench. The wrench limit piece includes a first abutting portion and a second abutting portion. The rotating wrench The rotation range of is limited between the first abutting portion and the second abutting portion.

Beneficial effect

Implementing the embodiments of this application will have the following beneficial effects:

In this application, the supporting force is provided by a gas spring, and the locking and unlocking of the gas spring is controlled by the reciprocating motion assembly. During operation, the remote end and the proximal end of the reciprocating motion assembly can be referenced for precise control. The operation is convenient, and the gas spring is The supporting force is stable and reliable.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

among them:

Figure 1 is a schematic diagram of a prior art rocker arm device.

Fig. 2 is a perspective view of an embodiment of a rocker device of the present application.

Figure 3 is an exploded view of Figure 2.

Fig. 4 is a partial enlarged view of part A in Fig. 3.

Fig. 5 is a working principle diagram of the rocker arm device of the present application.

Fig. 6 is a perspective view of a U-shaped guide block in an embodiment of a rocker arm device of the present application.

Fig. 7 is a longitudinal partial cross-sectional view of the rocker device of the eccentric wheel solution of the present application along the axis of the rotation shaft.

Fig. 8 is an exploded view of a partial structure of the structure of Fig. 7 including an eccentric wheel structure.

Fig. 9 is an exploded view of a partial structure of the present application including a crank slider structure.

Fig. 10 is a longitudinal partial cross-sectional view of the rocker arm device of the crank slider solution of the present application along the axis of the rotation shaft.

Fig. 11 is an assembly diagram of an embodiment of the rotating wrench and the wrench limit piece of the present application.

Embodiments of the present invention

The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by a person of ordinary skill in the art without creative work shall fall within the protection scope of this application.

The present application provides a rocker arm device. The perspective view is shown in Fig. 2, the exploded view is shown in Fig. 3, and Fig. 4 is a partial view, including the base 1, the rocker 2, the tray 3, the reciprocating motion assembly 4 and the gas spring 5. One end of the rocker arm 2 is hinged to the base 1 through a first mounting axis L1, and the other end is hinged to the tray 3 through a second mounting axis L2. The reciprocating motion assembly 4 is set on the base 1 through a rotation axis L0. The rocker arm 2 is close to the side of the tray 3, and the rotating shaft L0 drives the reciprocating movement assembly 4 to make a reciprocating movement. In the mechanical field, common reciprocating motion components include mechanisms such as cams, eccentric wheels, crank sliders, etc. The reciprocating motion components of this application include but are not limited to the above mechanisms. The gas spring 5 includes a fixed portion 51, a telescopic portion 52, and a thimble 53 connected in sequence. The fixed portion 51 is hinged with the base 1 through a third mounting shaft L3, and the telescopic portion is fixed on the rocker arm 2 The reciprocating movement assembly 4 acts on the thimble 53 to lock or unlock the gas spring 5. Wherein, the first installation shaft L1, the second installation shaft L2, the rotation shaft L0, and the third installation shaft L3 are arranged in parallel.

The working principle of the rocker arm device of the present application is shown in Fig. 5: when the reciprocating motion assembly 4 is in the state of the proximal end (the proximal end contacts the thimble 53), the thimble 53 at the end of the retractable part of the gas spring 5 is not compressed, and the gas The spring 5 is in a locked state and can provide a supporting force to fix the rocker arm 2 in a corresponding position. When the angle of the rocker arm 2 needs to be adjusted, the rotating shaft L0 is rotated to make the reciprocating assembly 4 in the remote end state (the remote end contacts the thimble 53), the thimble 53 of the gas spring 5 is pressed down, and the gas spring 5 is in a released state. The retractable part 52 can perform piston movement relative to the fixed part 51. When the tilt angle of the rocker arm 2 is adjusted, the length of the gas spring 5 can be stretched or shortened adaptively. When the rocker arm 2 is adjusted to the target position, the rotation axis L0 is rotated, Make the reciprocating motion assembly 4 in the proximal end state, eject the thimble 53 of the gas spring 5, keep the gas spring 5 in the locked state, and fix the rocker arm 2. The gas spring 5 is a common part in the mechanical field. Its type, structure and working principle are as follows Those skilled in the art are well-known, and will not be described in detail in this application. The locking and unlocking operations of the rocker arm device of the present application can be accurately controlled with reference to the remote end and the short-range end of the reciprocating motion assembly 4, the operation is convenient, and the supporting force of the gas spring 5 is stable and reliable.

Based on the above-mentioned embodiments, the present application provides a better way to fix the retractable portion 52, specifically a U-shaped guide block 6 is provided, as shown in FIG. 6, which includes a mounting hole 61 and a guide through hole 62. The mounting hole 61 transversely penetrates the two side walls of the "U-shape", and the guiding through hole 62 longitudinally penetrates the bottom of the "U-shape". The specific installation and connection mode is shown in Figure 7 (a cross-sectional view along the rotation axis L0). The rotation axis L0 passes through the mounting hole 61 and is rotatable relative to the U-shaped guide block 6, and the reciprocating movement assembly 4 is positive To the guide through hole 62; the retractable portion 52 passes through the guide through hole 62 and abuts on the guide through hole 62 through the shoulder 521, the reciprocating assembly 4 and the thimble 53 act , Control the locking and unlocking of the gas spring 5. That is, after the thimble 53 is pressed down by the reciprocating movement assembly 4, the retractable portion 52 can be extended or shortened relative to the fixed portion 51.

In the above embodiment, when rotating the rotating shaft L0, in addition to overcoming the pressure generated by the thimble 53 of the gas spring 5, the friction between the U-shaped guide block 6 and the rotating shaft L0 must be overcome. The bearing is arranged at the position to connect with the rotating shaft L0. The present application provides a technical solution that can solve the above problems and has a relatively low cost. Specifically, a sleeve 7 is provided. For the connection mode, refer to Figures 7 and 8, and the sleeve 7 The two ends of the sleeve 7 are fixed on the rocker arm 2, and the middle of the sleeve 7 is provided with a second through hole 71 on the sleeve wall facing the guide through hole 62; the sleeve 7 is sleeved on the U-shaped guide block 6 In the mounting hole 61, it is fixed by screws (threaded holes are drawn in the corresponding positions in the figure). The rotating shaft L0 is rotatably sleeved in the sleeve 7 relative to the sleeve 7. The reciprocating assembly 4 is located in the sleeve 7 and passes through the second through hole 71 and the thimble 53 of the gas spring 5. The function ensures that the second through hole 71, the guide through hole 62, and the thimble 53 are always in a straight line, so that the reciprocating movement assembly 4 can accurately act on the thimble. In this embodiment, the pressure of the gas spring 5 directly acts on the sleeve 7, and the rotating shaft L0 only needs to overcome the pressure of the thimble, which reduces the difficulty of rotating the rotating shaft L0.

In the above embodiments, the reciprocating movement assembly 4 may be provided with an eccentric 41A on the rotation axis L0, but when the eccentric is used alone, the eccentric not only exerts pressure on the thimble 53, but also has a friction effect, which causes the thimble 53 to be worn. , Affect the service life of thimble 53. Therefore, a better solution is to provide a bearing 42A as shown in Figures 7 and 8 and sleeve it on the eccentric 41A; the thimble 53 of the gas spring 5 abuts on the circumferential surface of the bearing 42A, so that the thimble will only be affected by Pressure does not produce wear.

This application also provides another embodiment in which the thimble 53 is not subject to wear. As shown in FIG. 9 and FIG. 10, the reciprocating movement assembly 4 adopts a crank slider assembly solution. Specifically, the crank slider assembly includes a connecting rod 41B and a slider 42B, the connecting rod 41B is hinged on the rotation axis L0; the slider 42B is hinged on the end of the connecting rod 41B; the thimble 53 of the gas spring 5 abuts on the Mentioned on the slider 42B. Since there is only pressure between the crank slider assembly and the thimble 53, the present technical solution will not cause wear to the thimble 53.

Further, in the above embodiment, a blind hole 43B may be provided at one end of the slider 42B close to the gas spring 5, and the thimble 53 of the gas spring abuts in the blind hole 43B, which can play a role in precise positioning. .

In each of the foregoing embodiments, further, a rotating wrench 10 can be provided at one end of the rotating shaft L0 to control the rotating shaft. Specifically, the rotating wrench 10 can be arranged at one end of the rotating shaft L0 and located outside the rocker arm 2. In order to accurately control the rotation angle of the reciprocating motion assembly 4, a wrench limit piece 11 can be provided. As shown in FIG. 11, the wrench limit piece 11 is fixed at one end of the rotating shaft L0 and located on the rocker arm 2 and the rotating wrench 10 In between, the wrench limiting piece 11 includes a first abutting portion 111 and a second abutting portion 112, and the rotation range of the rotating wrench 10 is limited to the first abutting portion 111 and the second abutting portion 112 between. For example, in the eccentric wheel solution, the angle between the line between the rotation center of the rotating wrench 10 and the first abutting portion 111 and the line with the second abutting portion 112 can be set to 180°, 0° and 180° correspond to the short-range and remote ends of the eccentric, respectively. Rotating the wrench to the two extremes corresponds to the locked and unlocked states of the rocker arm, which is convenient for operation.

The above descriptions are only the preferred embodiments of this application and are not intended to limit this application. Any modification, equivalent replacement and improvement made within the spirit and principle of this application shall be included in the protection of this application. Within range.

Claims

A rocker arm device includes a base, a rocker arm, and a tray. One end of the rocker arm is hinged to the base through a first mounting shaft, and the other end is hinged to the tray through a second mounting shaft, and is characterized in that , Further comprising: a reciprocating movement assembly, which is arranged on the side of the rocker arm close to the tray through a rotating shaft and reciprocates with the rotation of the rotating shaft; a gas spring includes a fixed part and a retractable part connected in sequence And a thimble, the fixed part is hinged with the base through a third mounting shaft, the telescopic part is fixed on the rocker arm, and the reciprocating component acts on the thimble for locking or unlocking the The gas spring; wherein, the first installation shaft, the second installation shaft, the rotation shaft and the third installation shaft are arranged in parallel.
The rocker arm device according to claim 1, further comprising: a U-shaped guide block provided with a mounting hole transversely penetrating the two side walls and a guide through hole longitudinally penetrating the bottom, the rotating shaft passes through the The mounting hole is rotatable relative to the U-shaped guide block, and the reciprocating assembly is directly facing the guide through hole; the telescopic part passes through the guide through hole and abuts on the guide through hole through a shoulder on.
The rocker arm device according to claim 2, further comprising: a sleeve, both ends of which are fixed on the rocker arm, and a second through hole is opened on the wall of the sleeve facing the guide through hole in the middle The U-shaped guide block is fixed on the sleeve through the mounting hole; the rotating shaft is rotatably sleeved in the sleeve relative to the sleeve, and the reciprocating component is located in the sleeve And through the second through hole to interact with the thimble of the gas spring.
The rocker arm device according to claim 2, wherein the reciprocating component is an eccentric wheel component or a crank slider component.
The rocker arm device according to claim 4, wherein the eccentric wheel assembly comprises: an eccentric wheel, which is fixed on the rotating shaft; a bearing, which is sleeved on the eccentric wheel; and a thimble of the gas spring Abutting on the circumferential surface of the bearing.
The rocker arm device according to claim 4, wherein the crank slider assembly comprises: a connecting rod hinged on the rotating shaft; a sliding block hinged on the end of the connecting rod; the gas spring The thimble abuts on the slider.
The rocker arm device according to claim 6, wherein the sliding block is provided with a blind hole at one end close to the gas spring, and the thimble of the gas spring abuts in the blind hole.
7. The rocker arm device according to any one of claims 1-7, further comprising: a rotating wrench, arranged at one end of the rotating shaft and located outside the rocker arm, for rotating the rotating shaft.
The rocker arm device according to claim 8, further comprising: a wrench limiting piece, fixed on the outside of the rocker arm and located between the rocker arm and the rotating wrench, the wrench limiting The sheet includes a first abutting portion and a second abutting portion, and the rotation range of the rotating wrench is limited between the first abutting portion and the second abutting portion.