阅读说明：本技术 一种摇臂装置 (Rocker arm device ) 是由 肖珊珊 扈钧 谢超群 雷文斌 于 2019-10-29 设计创作，主要内容包括：本发明提供了一种摇臂装置,包括底座、摇臂,以及托盘,所述摇臂的一端通过第一安装轴铰接于所述底座上,另一端通过第二安装轴铰接在所述托盘上,还包括：凸轮,通过转动轴设置在所述摇臂靠近所述托盘的一侧,所述转动轴带动所述凸轮转动；气弹簧,包括依次连接的固定部、可伸缩部和顶针,所述固定部通过第三安装轴与所述底座铰接,所述可伸缩部固定在所述摇臂上,所述凸轮作用在所述顶针上,用于锁紧或解锁所述气弹簧；其中,第一安装轴、第二安装轴、转动轴和第三安装轴平行设置。本发明的摇臂装置锁止和解锁操作,可参考凸轮的远程端和近程端控制凸轮的旋转角度,操作方便,并且气弹簧的支撑力稳定可靠。(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 cam is arranged on one side, close to the tray, of the rocker arm through a rotating shaft, and the rotating shaft drives the cam to rotate; 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 cam 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. The rocker arm device disclosed by the invention can control the rotating angle of the cam by referring to the remote end and the close end of the cam in locking and unlocking operations, is convenient to operate, and has stable and reliable supporting force of the gas spring.)

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 cam is arranged on one side, close to the tray, of the rocker arm through a rotating shaft, and the rotating shaft drives the cam to rotate;

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 cam 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.

2. The rocker arm apparatus of claim 1, further comprising:

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 cam 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.

3. The rocker arm apparatus of claim 2, further comprising:

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 cam is located in the sleeve and acts with the ejector pin of the air spring through the second through hole.

4. The rocker arm apparatus of claim 2, wherein said nose pin abuts against an arcuate surface of said cam.

5. The rocker arm apparatus of claim 2, further comprising:

the first friction block is slidably arranged at the guide through hole, and a thimble of the gas spring abuts against the first friction block and abuts against the cambered surface of the cam through the first friction block.

6. The rocker arm apparatus of claim 2, further comprising:

the second friction block is slidably arranged at the guide through hole, and one end, close to the cam, of the second friction block is provided with a U-shaped groove;

the fourth mounting shaft is erected in the U-shaped groove of the second friction block and is parallel to the rotating shaft;

the rotating piece is rotatably arranged on the fourth mounting shaft and is positioned in the U-shaped groove of the second friction block;

and a thimble of the gas spring is abutted against the second friction block and is abutted against the cambered surface of the cam through the rotating piece.

7. The rocker arm apparatus of claim 6, wherein the second friction block is provided with a blind hole at an end thereof adjacent to the gas spring, and the ejector pin of the gas spring abuts in the blind hole.

8. The rocker arm apparatus of any of claims 1-7, further comprising:

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.

9. The rocker arm apparatus of claim 8, further comprising:

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.

10. The rocker arm apparatus of claim 9, wherein a line connecting a center of rotation of said rotational wrench and said first abutment portion and a line connecting said second abutment portion are at right angles.

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 cam is arranged on one side, close to the tray, of the rocker arm through a rotating shaft, and the rotating shaft drives the cam to rotate;

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 cam 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 cam 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 cam is located in the sleeve and acts with the ejector pin of the air spring through the second through hole.

Further, the ejector pin abuts against the arc surface of the cam.

Further, the rocker arm device further comprises:

the first friction block is slidably arranged at the guide through hole, and a thimble of the gas spring abuts against the first friction block and abuts against the cambered surface of the cam through the first friction block.

Further, the rocker arm device further comprises:

the second friction block is slidably arranged at the guide through hole, and one end, close to the cam, of the second friction block is provided with a U-shaped groove;

the fourth mounting shaft is erected in the U-shaped groove of the second friction block and is parallel to the rotating shaft;

the rotating piece is rotatably arranged on the fourth mounting shaft and is positioned in the U-shaped groove of the second friction block;

and a thimble of the gas spring is abutted against the second friction block and is abutted against the cambered surface of the cam through the rotating piece.

Furthermore, a blind hole is formed in one end, close to the gas spring, of the second friction 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.

Furthermore, the included angle between the rotating center of the rotating wrench and the connecting line of the first abutting part and the included angle between the rotating center of the rotating wrench and the connecting line of the second abutting part are right angles.

Compared with the prior art, the invention has the beneficial effects that: the supporting force is provided by the gas spring, the locking and unlocking of the gas spring are controlled by the cam, the rotating angle of the cam can be controlled by referring to the remote end and the close end of the cam during operation, 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.

FIG. 7 is a longitudinal partial cross-sectional view of one embodiment of the rocker arm apparatus of the present invention taken along the axis of the rotatable shaft.

FIG. 8 is an exploded view of a portion of an embodiment of the rocker arm apparatus of the present invention including a first friction block.

FIG. 9 is an exploded view of a portion of an embodiment of a rocker arm apparatus of the present invention including a second friction block.

FIG. 10 is a partial cross-sectional view of an embodiment of a rocker arm apparatus of the present invention incorporating a second friction block.

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 an embodiment of a rocker arm device, which is shown in a perspective view in fig. 2, an exploded view in fig. 3 and a partial view in fig. 4, and comprises a base 1, a rocker arm 2, a tray 3, a cam 4 and a gas spring 5. One end of the rocker arm 2 is hinged to the base 1 through a first mounting shaft L1, the other end of the rocker arm is hinged to the tray 3 through a second mounting shaft L2, the cam 4 is arranged on one side, close to the tray 3, of the rocker arm 2 through a rotating shaft L0, and the rotating shaft L0 drives the cam 4 to rotate. Air 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 52 is fixed on rocking arm 2, cam 4 is used for on the thimble 53, is used for locking or unblock air 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 follows, and can be seen in figure 5: when the cam 4 is at the near end (the near 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 and can provide a supporting force to fix the rocker arm 2 at the corresponding position. When the angle of the rocker arm 2 needs to be adjusted, the rotating shaft L0 is rotated to enable the cam 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 part 52 can perform piston motion relative to the fixed part 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 cam 4 to be in a close end state, the thimble 53 of the gas spring is ejected, the gas spring 5 keeps 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 are well known by those skilled in the art. The rocker arm device of the invention can control the rotation angle of the cam 4 by referring to the remote end and the close end of the cam 4, the operation is convenient, and the supporting force of the gas spring 5 is stable and reliable.

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 a 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 cam 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 cam 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 by the cam 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 cam 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 cam 4 can accurately act on the ejector pin. In this embodiment, the pressure of the gas spring 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 present invention, "the cam 4 acts on the thimble 53 of the gas spring 5 through the second through hole 71", it should be understood that the cam 4 and the thimble 53 may directly contact each other or indirectly contact each other. Specifically, the thimble 53 may directly abut against the arc surface of the cam 4, but in this embodiment, when the rotation shaft L0 is rotated, the thimble 53 is subjected to pressure and also rubbed against the cam 4, and long-term friction may cause wear of the thimble 53, which may affect the service life of the gas spring 5. Therefore, preferably, a first friction block 8 is disposed between the thimble 53 and the cam 4, and as shown in fig. 8 in particular, the first friction block 8 is slidably disposed at the guide through hole 62, the thimble 53 of the gas spring 5 abuts against the first friction block 8, and the first friction block 8 abuts against the arc surface of the cam 4, that is, the thimble 53 abuts against the arc surface of the cam 4 through the first friction block 8, and the two contact functions indirectly. Thus, the thimble 53 receives only the pressure of the first friction block 8 and no longer receives the friction force.

In the first friction block 8, although the problem of friction damage of the thimble 53 is solved, friction force still exists between the cam 4 and the first friction block 8, and the first friction block 8 can cause abrasion to the cam 4. Further, the present invention provides another modification, as shown in fig. 9 and 10. The rocker arm device comprises a second friction block 9, a fourth mounting shaft L4 and a rotating piece 92, wherein the second friction block 9 is slidably arranged at the guide through hole 62, and one end of the second friction block 9 close to the cam 4 is provided with a U-shaped groove 91; a fourth mounting shaft L4 is erected in the U-shaped groove 91 and is parallel to the rotating shaft L0; the rotating member 92 is rotatably provided on the fourth mounting shaft L4 and is located in the U-shaped groove 91; the thimble 53 of the gas spring 5 abuts against the second friction block 9 and abuts against the arc surface of the cam 4 through the rotating member 92. In this embodiment, the rolling friction between the cam 4 and the rotating member 92 can greatly reduce the wear of the cam 4, wherein the rotating member 92 is a curved surface, such as a cylinder, a sphere, etc., which is in contact with the cam 4 during rotation.

Further, in the above embodiment, a blind hole 93 may be formed at an end of the second friction block 9 close to the gas spring 5, and the thimble 53 of the gas spring abuts against the blind hole, so as to achieve a precise positioning function. Similarly, the first friction block 8 can be designed with the same structure.

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 cam 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 is 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. Preferably, the angle between the line connecting the rotation center of the rotary wrench 10 and the first abutting portion 111 and the line connecting the second abutting portion 112 is a right angle, 0 ° and 90 ° respectively correspond to the proximal end and the distal end of the cam 4, and the arc surface of the cam 4 may be set as: when the rotary wrench 10 rotates at 0 ° to 10 °, the cam 4 does not act on the thimble 53, and this region belongs to a buffer region, and when the cam 4 starts to act on the thimble 53 after rotating over 10 °, the height of the rocker arm 2 can be adjusted at this time, but the force required to be adjusted is large, which is inconvenient to adjust, when the rotary wrench 10 rotates to 80 °, the adjusting force reaches the maximum value, the thimble 53 is in a completely unlocked state, the height of the rocker arm 2 can be easily adjusted, and between 80 ° and 90 °, the buffer region belongs to, and this angle region continues to screw the rotary wrench 10, the acting force between the cam 4 and the thimble 53 is unchanged, and the two buffer regions function as: because the rotary wrench 10 is arranged outside, the mistaken collision is easy to happen, even if the mistaken collision happens between 0 degree and 10 degrees, the air spring can not be unlocked, the mistaken collision happens between 80 degrees and 90 degrees, and the phenomenon that the rotary wrench 10 suddenly jumps back to 0 degree can not happen. Convenient operation, safety and reliability.

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.