CN110748759B

CN110748759B - Rocker arm device

Info

Publication number: CN110748759B
Application number: CN201911037556.7A
Authority: CN
Inventors: 肖珊珊; 扈钧; 谢超群; 雷文斌
Original assignee: Shenzhen Comen Medical Instruments Co Ltd
Current assignee: Shenzhen Comen Medical Instruments Co Ltd
Priority date: 2019-10-29
Filing date: 2019-10-29
Publication date: 2021-07-27
Anticipated expiration: 2039-10-29
Also published as: CN110748759A; WO2021082777A1

Abstract

The invention provides a rocker arm device, which comprises a base, a rocker arm and a tray, wherein one end of the rocker arm is hinged on the base through a first mounting shaft, and the other end of the rocker arm is hinged on the tray through a second mounting shaft, and the rocker arm device also comprises: the reciprocating motion assembly is arranged on one side of the rocker arm close to the tray through a rotating shaft and reciprocates along with the rotation of the rotating shaft; the air spring, including fixed part, scalable portion and the thimble that connects gradually, the fixed part pass through the third installation axle with the base is articulated, scalable portion is fixed on the rocking arm, the reciprocating motion subassembly is used for locking or unblock on the thimble the air spring. The rocker arm device can perform locking and unlocking operations, can perform accurate control by referring to the long-range end and the short-range end of the reciprocating motion assembly, is convenient to operate, and has stable and reliable supporting force of the gas spring.

Description

Rocker arm device

Technical Field

The invention belongs to the technical field of mechanical installation, and particularly relates to a rocker arm device.

Background

The rocker arm device, as shown in fig. 1, generally comprises a base 1, which is hinged in sequence, a rocker arm 2, which serves for fixing, for example to a wall, and a tray 3, which is intended to carry items such as televisions, displays and the like. The article can be adjusted to a suitable height by adjusting the angle of rotation of the swing arm. The existing rocker arm adjusting structure comprises an adjusting rod 4A, an adjusting sleeve 4B fixed on the rocker arm 2 and a locking bolt 4C, wherein one end of the adjusting rod 4A is hinged to the base 1, the other end of the adjusting rod is sleeved on the adjusting sleeve 4B, and the locking bolt 4C is used for locking the fixed 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, the rocker arm 2 is rotated to the target position, the locking bolt 4C is screwed down to lock the adjusting rod 4A, and the adjusting rod 4A plays a supporting role.

When the inclination angle of the rocker arm 2 is adjusted, the rocker arm device is operated by loosening and tightening the bolt, the tightness degree is completely felt, the rocker arm device is very inconvenient, the whole structure is not stable enough, and the rocker arm device can shake after being locked. Therefore, the prior art has yet to be improved.

Disclosure of Invention

The invention aims to provide a rocker arm device, and aims to solve the problems that an existing rocker arm device is inconvenient to operate and is prone to shaking after being locked.

In order to solve the above technical problem, the present invention is implemented as such, in which the 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 of the rocker arm is hinged to the tray through a second mounting shaft, and the rocker arm device further includes:

the reciprocating motion assembly is arranged on one side of the rocker arm close to the tray through a rotating shaft and reciprocates along with the rotation of the rotating shaft;

the gas spring comprises a fixing part, a telescopic part and a thimble which are sequentially connected, the fixing part is hinged with the base through a third mounting shaft, the telescopic part is fixed on the rocker arm, and the reciprocating motion assembly acts on the thimble and is used for locking or unlocking the gas spring;

wherein, first installation axle, second installation axle, axis of rotation and third installation axle parallel arrangement.

Further, the rocker arm device further comprises:

the U-shaped guide block is provided with mounting holes transversely penetrating through two side walls and a guide through hole longitudinally penetrating through the bottom, the rotating shaft penetrates through the mounting holes and can rotate relative to the U-shaped guide block, and the reciprocating motion assembly is opposite to the guide through hole;

the telescopic part penetrates through the guide through hole and abuts against the guide through hole through a shaft shoulder.

Further, the rocker arm device further comprises:

the two ends of the sleeve are fixed on the rocker arm, and a second through hole is formed in the sleeve wall, which is opposite to the guide through hole, in the middle of the sleeve; 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 motion assembly is located in the sleeve and acts with the ejector pin of the gas spring through the second through hole.

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

Further, the eccentric wheel assembly includes:

the eccentric wheel is fixed on the rotating shaft;

the bearing is sleeved on the eccentric wheel; and a thimble of the gas spring is abutted against the circumferential surface of the bearing.

Further, the slider-crank assembly comprises:

the connecting rod is hinged on the rotating shaft;

the sliding block is hinged at the tail end of the connecting rod; and a thimble of the gas spring is abutted against the sliding block.

Furthermore, a blind hole is formed in one end, close to the gas spring, of the sliding block, and a thimble of the gas spring abuts against the blind hole.

Further, the rocker arm device further comprises:

and the rotating wrench is arranged at one end of the rotating shaft, is positioned on the outer side of the rocker arm and is used for rotating the rotating shaft.

Further, the rocker arm device further comprises:

the spanner limiting piece is fixed on the outer side of the rocker arm and located between the rocker arm and the rotary spanner, the spanner limiting piece comprises a first abutting portion and a second abutting portion, and the rotation range of the rotary spanner is limited between the first abutting portion and the second abutting portion.

Compared with the prior art, the invention has the beneficial effects that: the invention provides supporting force through the gas spring, and the locking and unlocking of the gas spring are controlled by the reciprocating motion assembly, so that during operation, the remote end and the near end of the reciprocating motion assembly can be referred to for accurate control, the operation is convenient, and the supporting force of the gas spring is stable and reliable.

Drawings

FIG. 1 is a schematic diagram of a prior art rocker arm apparatus.

Fig. 2 is a perspective view of one embodiment of a rocker arm apparatus of the present invention.

Fig. 3 is an exploded view of fig. 2.

Fig. 4 is a partially enlarged view of a portion a in fig. 3.

FIG. 5 is a schematic diagram of the operation of the rocker arm apparatus of the present invention.

Fig. 6 is a perspective view of a U-shaped guide block in one embodiment of a rocker arm apparatus of the present invention.

Figure 7 is a longitudinal partial cross-sectional view of the rocker arm assembly of the eccentric version of the present invention along the axis of the rotating shaft.

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

Fig. 9 is an exploded view of a portion of the structure of the present invention including a slider-crank structure.

Fig. 10 is a longitudinal partial cross-sectional view of the rocker arm arrangement of the slider-crank solution of the present invention along the axis of the rotary shaft.

FIG. 11 is an assembly view of one embodiment of the rotational wrench and wrench tabs of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The invention provides a rocker arm device, which is shown in a perspective view and an explosion view in fig. 2 and fig. 3 and fig. 4 is a partial view and comprises a base 1, a rocker arm 2, a tray 3, a reciprocating assembly 4 and an air spring 5, wherein one end of the rocker arm 2 is hinged on the base 1 through a first mounting shaft L1, the other end of the rocker arm is hinged on the tray 3 through a second mounting shaft L2, the reciprocating assembly 4 is arranged on one side of the rocker arm 2 close to the tray 3 through a rotating shaft L0, and the rotating shaft L0 drives the reciprocating assembly 4 to do reciprocating motion. In the field of machinery, common reciprocating assemblies include mechanisms such as cams, eccentric wheels, crank blocks and the like, and the reciprocating assembly of the present invention includes and is not limited to the above mechanisms. Gas spring 5 is including fixed part 51, scalable portion 52 and the thimble 53 that connects gradually, fixed part 51 through third installation axle L3 with base 1 is articulated, scalable portion is fixed on rocking arm 2, reciprocating motion subassembly 4 is used for on the thimble 53, is used for locking or unblock gas spring 5. The first mounting shaft L1, the second mounting shaft L2, the rotating shaft L0 and the third mounting shaft L3 are disposed in parallel.

The working principle of the rocker arm device of the invention is as shown in figure 5: when the reciprocating assembly 4 is in a close end state (the close end contacts the thimble 53), the thimble 53 at the telescopic end of the gas spring 5 is not compressed, and the gas spring 5 is in a locking state, so that a supporting force can be provided to fix the rocker arm 2 at a corresponding position. When the angle of the rocker arm 2 needs to be adjusted, the rotating shaft L0 is rotated to enable the reciprocating assembly 4 to be in a remote end state (the remote end contacts the thimble 53), the thimble 53 of the gas spring 5 is pressed down, the gas spring 5 is in a release state, the telescopic portion 52 can perform piston motion relative to the fixed portion 51, when the inclination angle of the rocker arm 2 is adjusted, the length of the gas spring 5 can be adaptively extended or shortened, after the rocker arm 2 is adjusted to a target position, the rotating shaft L0 is rotated to enable the reciprocating assembly 4 to be in a near end state, the thimble 53 of the gas spring 5 is ejected, the gas spring 5 is kept in a locking state, the rocker arm 2 is fixed, and the gas spring 5 is a common part in the mechanical field, and the type, the structure and the working principle of the gas spring are well known by those. The rocker arm device can be precisely controlled by referring to the remote end and the near end of the reciprocating assembly 4 in locking and unlocking operations, is convenient to operate, and has stable and reliable supporting force of the gas spring 5.

Based on the above embodiments, the present invention provides a preferable fixing manner of the stretchable portion 52, and specifically, a U-shaped guide block 6 is provided, as shown in fig. 6, and includes a mounting hole 61 and a guide through hole 62, the mounting hole 61 transversely penetrates through two side walls of the "U" shape, and the guide through hole 62 longitudinally penetrates through the bottom of the "U" shape. The specific installation connection is shown in fig. 7 (a cross-sectional view along the rotation axis L0), the rotation axis L0 passes through the installation hole 61 and is rotatable relative to the U-shaped guide block 6, and the reciprocating assembly 4 is opposite to the guide through hole 62; the telescopic part 52 penetrates through the guide through hole 62 and abuts against the guide through hole 62 through a shaft shoulder 521, and the reciprocating assembly 4 and the ejector pin 53 act to control locking and unlocking of the gas spring 5. That is, when the thimble 53 is pressed down by the reciprocating assembly 4, the retractable portion 52 can be extended or shortened with respect to the fixed portion 51.

In the above embodiment, when the rotating shaft L0 is rotated, not only the pressure generated by the thimble 53 of the gas spring 5 but also the friction between the U-shaped guide block 6 and the rotating shaft L0 need to be overcome, and for this, a bearing may be disposed at the mounting hole 61 to connect with the rotating shaft L0, and the present invention provides a technical solution that can solve the above problems and has a relatively low cost, specifically, a sleeve 7 is disposed, the connection mode refers to fig. 7 and 8, two ends of the sleeve 7 are fixed on the rocker arm 2, and a second through hole 71 is disposed on the sleeve wall of the sleeve 7 facing the guide through hole 62; the sleeve 7 is sleeved in the mounting hole 61 of the U-shaped guide block 6 and fixed by screws (threaded holes are drawn at corresponding positions in the figure). The rotating shaft L0 is rotatably sleeved in the sleeve 7 relative to the sleeve 7, the reciprocating component 4 is located in the sleeve 7, and the second through hole 71 and the ejector pin 53 of the gas spring 5 act on each other, so that the second through hole 71, the guide through hole 62 and the ejector pin 53 are always in a straight line, and the reciprocating component 4 can accurately act on the ejector pin. 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 ejector pin, so that the difficulty in rotating the rotating shaft L0 is reduced.

In the above embodiments, the reciprocating assembly 4 may be provided with an eccentric 41A on the rotating shaft L0, but when the eccentric is used alone, the eccentric not only generates pressure on the thimble 53, but also has a friction effect, so that the thimble 53 is worn, and the service life of the thimble 53 is affected. Therefore, as shown in fig. 7 and 8, a bearing 42A is preferably provided and sleeved on the eccentric wheel 41A; the thimble 53 of the gas spring 5 abuts on the circumferential surface of the bearing 42A, so that the thimble is only pressed and does not wear.

The present invention also provides another embodiment in which the thimble 53 is not worn, as shown in fig. 9 and 10, the reciprocating assembly 4 adopts a crank block assembly scheme. Specifically, the slider-crank assembly comprises a connecting rod 41B and a slider 42B, and the connecting rod 41B is hinged on the rotating shaft L0; a slider 42B hinged to the end of the connecting rod 41B; the thimble 53 of the gas spring 5 abuts on the slider 42B. Because only pressure action exists between the crank block assembly and the thimble 53, the thimble 53 is not abraded by the technical scheme.

Further, in the above embodiment, a blind hole 43B may be further disposed at one end of the slider 42B close to the gas spring 5, and the thimble 53 of the gas spring abuts against the blind hole 43B, so as to achieve a precise positioning function.

In the foregoing embodiments, further, the turning wrench 10 may be provided at one end of the turning shaft L0 to control the turning of the turning shaft, specifically, the turning wrench 10 may be provided at one end of the turning shaft L0 and located outside the swing arm 2. In order to precisely control the rotation angle of the reciprocating assembly 4, a wrench stopper 11 may be provided, as shown in fig. 11, the wrench stopper 11 is fixed to one end of the rotation shaft L0 and located between the swing arm 2 and the rotation wrench 10, the wrench stopper 11 includes a first abutting portion 111 and a second abutting portion 112, and the rotation range of the rotation wrench 10 is limited between the first abutting portion 111 and the second abutting portion 112. For example, in the eccentric solution, the angles between the line connecting the center of rotation of the rotational wrench 10 and the first abutting portion 111 and the line connecting the second abutting portion 112 may be set to 180 °, 0 ° and 180 ° respectively corresponding to the proximal end and the distal end of the eccentric. The rotary wrench rotates to two extreme ends which respectively correspond to the locking state and the unlocking state of the rocker arm, and the operation is convenient.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a rocker arm device, includes base, rocking arm to and the tray, the one end of rocking arm through first installation axle articulate in on the base, the other end passes through second installation axle articulate on the tray, its characterized in that still includes:

the reciprocating motion component is right opposite to the guide through hole, and the telescopic part penetrates through the guide through hole and abuts against the guide through hole through a shaft shoulder;

the two ends of the sleeve are fixed on the rocker arm, a second through hole is formed in the sleeve wall, opposite to the guide through hole, of the middle of the sleeve, 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 motion assembly is located in the sleeve and acts with the ejector pin of the air spring through the second through hole;

2. The rocker arm apparatus of claim 1, wherein the reciprocating assembly is an eccentric wheel assembly or a slider-crank assembly.

3. The rocker arm apparatus of claim 2, wherein the eccentric wheel assembly comprises:

the eccentric wheel is fixed on the rotating shaft;

4. The rocker arm apparatus of claim 2, wherein the slider-crank assembly comprises:

the connecting rod is hinged on the rotating shaft;

5. The rocker arm apparatus of claim 4, wherein an end of the slider proximate the gas spring is provided with a blind bore in which a thimble of the gas spring abuts.

6. The rocker arm apparatus of any of claims 1-5, further comprising:

7. The rocker arm apparatus of claim 6, further comprising: