Actuating cylinder with limiting function

Abstract

The actuator cylinder with the limiting function comprises a cylinder body, a cylinder bottom, a piston, a piston rod, an end cover and a limiting mechanism, the cylinder bottom is installed at one end of the cylinder body, the end cover is installed at the other end of the cylinder body, the piston is installed in the cylinder body in a sliding mode, one end of the piston rod is connected with the piston, and the other end of the piston rod extends out of the cylinder body and is connected with a rod head. The limiting mechanism comprises an air bag and a sliding block, a limiting groove is formed in one side of the inner wall of the barrel, the sliding block is slidably installed in the limiting groove, the air bag is arranged in the limiting groove and connected with the sliding block, and the air bag is connected with an air pump through an air pipe; air is injected into the air bag through the air pump, after the air bag expands, the sliding block in the limiting groove is extruded outwards, the piston is limited by the sliding block in the return stroke process, then the total stroke of the piston is shortened, after the air pump exhausts air, the sliding block returns into the limiting groove, and the total stroke of the piston can be recovered. The utility model further provides the actuator cylinder capable of flexibly adjusting the stroke of the piston.

Description

Technical Field

[0001] The utility model relates to the field of actuators, and particularly relates to an actuator with a limiting function. Background Art

[0002] Traditional hydraulic actuators do not have the function of changing the stroke, and the safe driving of the actuated mechanism cannot be guaranteed. The Chinese utility model patent with the publication number CN201851422U discloses an actuator with a limiting bushing. In this invention, the total stroke of the piston is also reduced through the limiting bushing, thereby ensuring the safe driving of the actuated mechanism. However, in this invention, only the total stroke of the piston can be reduced, and the total stroke of the piston cannot be restored. Therefore, it has become an urgent problem to provide an actuator that can flexibly adjust the piston stroke. Summary of the Utility Model

[0003] (1) Technical Problems to be Solved

[0004] In order to solve the above problems of the prior art, the utility model provides an actuator that can flexibly adjust the piston stroke.

[0005] (2) Technical Solutions

[0006] In order to achieve the above purpose, the main technical solutions adopted by the utility model include:

[0007] An actuator with a limiting function, comprising a cylinder body, a cylinder bottom, a piston, a piston rod, an end cover, and a limiting mechanism;

[0008] One end of the cylinder body is provided with the cylinder bottom, and the other end of the cylinder body is provided with the end cover;

[0009] The piston is slidably installed in the cylinder body;

[0010] One end of the piston rod is connected to the piston, and the other end of the piston rod extends out of the cylinder body and is connected with a rod head;

[0011] The limiting mechanism includes an airbag and a slider;

[0012] A limiting groove is formed on one side of the inner wall of the cylinder body;

[0013] The slider is slidably installed in the limiting groove;

[0014] The airbag is arranged in the limiting groove and is connected to the slider. The airbag is connected to an air pump through a trachea.

[0015] Preferably, two groups of limiting mechanisms are provided and are oppositely arranged on both sides of the inner wall of the cylinder body close to the cylinder bottom.

[0016] Preferably, two sets of limiting mechanisms are provided and are oppositely arranged on both sides of the inner wall of the cylinder body close to the end cover.

[0017] Preferably, the limiting mechanism further includes a chute, a raised block and a spring;

[0018] The chute is opened on both sides inside the limiting groove;

[0019] Raised blocks are oppositely arranged on both sides of the slider, and the raised blocks are slidably installed in the chute;

[0020] The spring is installed in the chute, and under the action of the spring, the slider moves towards the inside of the limiting groove.

[0021] Preferably, the limiting mechanism further includes a guide rod. The guide rod is arranged in the chute, the raised block is slidably installed on the guide rod, the spring is sleeved on the guide rod, one end of the spring is connected to the inner wall of the limiting groove, and the other end of the spring is connected to the raised block.

[0022] Preferably, a first oil port and a second oil port are respectively arranged on the cylinder body.

[0023] (III) Beneficial Effects

[0024] The beneficial effects of the present utility model are as follows: By adopting the above technical solution, after injecting gas into the airbag through an air pump and the airbag expands, the slider in the limiting groove is extruded outwards. During the return stroke of the piston, it is limited by the slider, thereby shortening the total stroke of the piston. After the air pump exhausts, the slider returns to the limiting groove, and the total stroke of the piston can be restored. Furthermore, an actuating cylinder capable of flexibly adjusting the piston stroke is provided. Description of the Drawings

[0025] Figure 1 It is a schematic structural diagram of an actuating cylinder with a limiting function Figure 1 ;

[0026] Figure 2 It is a schematic structural diagram of an actuating cylinder with a limiting function Figure 2 ;

[0027] Figure 3 It is Figure 2 the enlarged schematic diagram of part A in

[0028] Figure 4 It is the front view of an actuating cylinder with a limiting function.

[0029]

Description of the Reference Numerals

[0030] 1. Cylinder body;

[0031] 2. Limiting mechanism;

[0032] 21. Airbag; 22. Slide block; 23. Guide rod; 24. Chute; 25. Protruding block; 26. Spring;

[0033] 3. Bottom of the cylinder;

[0034] 4. Piston;

[0035] 5. Piston rod;

[0036] 6. End cover;

[0037] 7. Rod head;

[0038] 8. First oil port;

[0039] 9. Second oil port. Specific implementation manner

[0040] In order to better explain the present utility model for easy understanding, the present utility model will be described in detail below in conjunction with the accompanying drawings through specific implementation manners.

[0041] Please refer to Figures 1 to 4 , the present utility model provides an actuating cylinder with a limiting function, including a cylinder body 1, a bottom of the cylinder 3, a piston 4, a piston rod 5, an end cover 6 and a limiting mechanism 2;

[0042] One end of the cylinder body 1 is provided with the bottom of the cylinder 3, and the other end of the cylinder body 1 is provided with the end cover 6;

[0043] The piston 4 is slidably installed in the cylinder body 1;

[0044] One end of the piston rod 5 is connected to the piston 4, and the other end of the piston rod 5 extends out of the cylinder body 1 and is connected with a rod head 7;

[0045] The limiting mechanism 2 includes an airbag 21 and a slide block 22;

[0046] A limiting groove is provided on one side of the inner wall of the cylinder body 1;

[0047] The slide block 22 is slidably installed in the limiting groove;

[0048] The airbag 21 is arranged in the limiting groove and is connected to the slide block 22. The airbag 21 is connected to an air pump through a trachea;

[0049] Among them, two groups of limiting mechanisms 2 are provided and are oppositely arranged on both sides of the inner wall of the cylinder body 1 close to the bottom of the cylinder 3;

[0050] During use, gas is injected into the airbag 21 through an air pump. After the airbag 21 expands, the slider 22 in the limiting groove is extruded outwards. During the return stroke of the piston 4, it is limited by the slider 22, thereby shortening the total stroke of the piston 4. After the air pump exhausts the gas, the slider 22 returns to the limiting groove, and the total stroke of the piston 4 can be restored. Furthermore, an actuating cylinder capable of flexibly adjusting the stroke of the piston 4 is provided.

[0051] It should be noted that the air pump is an electric air pump, which can not only inflate the airbag 21 but also discharge the gas from the airbag 21.

[0052] In this embodiment, two sets of limiting mechanisms 2 are provided, which are oppositely arranged on both sides of the inner wall of the cylinder body 1 close to the end cover 6. When gas is injected into the airbag 21 through the air pump, after the airbag 21 expands, the slider 22 in the limiting groove is extruded outwards. During the driving process of the piston 4, it is limited by the slider 22, thereby shortening the total forward stroke of the piston 4. After the air pump exhausts the gas, the slider 22 returns to the limiting groove, and the total stroke of the piston 4 can be restored. Furthermore, an actuating cylinder capable of flexibly adjusting the stroke of the piston 4 is provided.

[0053] In this embodiment, the limiting mechanism 2 further includes a sliding groove 24, a protruding block 25 and a spring 26;

[0054] The sliding groove 24 is opened on both sides inside the limiting groove;

[0055] Protruding blocks 25 are oppositely arranged on both sides of the slider 22, and the protruding blocks 25 are slidably installed in the sliding groove 24;

[0056] The spring 26 is installed in the sliding groove 24. Under the action of the spring 26, the slider 22 moves towards the inside of the limiting groove;

[0057] The limiting mechanism 2 further includes a guide rod 23. The guide rod 23 is arranged in the sliding groove 24. The protruding block 25 is slidably installed on the guide rod 23. The spring 26 is sleeved on the guide rod 23. One end of the spring 26 is connected to the inner wall of the limiting groove, and the other end of the spring 26 is connected to the protruding block 25;

[0058] During use, after the airbag 21 exhausts the gas, under the action of the spring 26, the slider 22 is reset and returns to the limiting groove.

[0059] In this embodiment, a first oil port 8 and a second oil port 9 are respectively arranged on the cylinder body 1. After hydraulic oil is injected into the first oil port 8, the piston 4 moves outwards. After hydraulic oil is injected into the second oil port 9, the piston 4 contracts during its return stroke.

[0060] The working principle of the present utility model is as follows:

[0061] Gas is injected into the airbag 21 through an air pump. After the airbag 21 expands, the slider 22 in the limit groove is extruded outwards. During the return stroke of the piston 4, it is limited by the slider 22, thereby shortening the total stroke of the piston 4. After the air pump exhausts, the slider 22 returns to the limit groove, and the total stroke of the piston 4 can be restored, thereby providing an actuating cylinder capable of flexibly adjusting the stroke of the piston 4.

[0062] The circuits, electronic components and modules involved are all prior arts and can be fully implemented by those skilled in the art without further elaboration. The content protected by the present utility model does not involve improvements to software and methods either.

[0063] The above are only embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in the relevant technical fields, shall be equally included in the patent protection scope of the present utility model.

[0064] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An actuator with a limiting function, characterized in that: It includes a cylinder body, a cylinder bottom, a piston, a piston rod, an end cover and a limiting mechanism; A cylinder bottom is installed at one end of the cylinder, and the end cover is installed at the other end of the cylinder; The piston is slidably mounted in the cylinder; One end of the piston rod is connected to the piston, and the other end of the piston rod extends out of the cylinder and is connected to a rod head; The limiting mechanism includes an airbag and a slider; A limited groove is provided on one side of the inner wall of the cylinder; The sliding block is slidably installed in the limiting groove; The airbag is arranged in the limiting groove and connected to the slider, and the airbag is connected to the air pump through an air pipe.

2. The actuator with a limiting function according to claim 1, characterized in that: The limiting mechanism is provided with two groups, which are arranged oppositely on two sides of the inner wall of the cylinder close to the cylinder bottom.

3. The actuator with a limiting function according to claim 1, characterized in that: The limiting mechanism is provided with two groups, which are arranged oppositely on two sides of the inner wall of the cylinder close to the end cover.

4. The actuator with a position limiting function according to claim 1, characterized in that: The limiting mechanism also includes a slide groove, a protruding block and a spring; The slide grooves are arranged on both sides of the limiting groove; The two sides of the slider are oppositely provided with protruding blocks, and the protruding blocks are slidably installed in the slide groove; The spring is installed in the slide groove, and under the action of the spring, the slide block moves toward the inside of the limiting groove.

5. The actuator with a position limiting function according to claim 4, characterized in that: The limiting mechanism also includes a guide rod, which is arranged in the slide groove, the protruding block is slidably installed on the guide rod, the spring is sleeved on the guide rod, one end of the spring is connected to the inner wall of the limiting groove, and the other end of the spring is connected to the protruding block.

6. The actuator with a position limiting function according to claim 1, characterized in that: The cylinder is respectively provided with a first oil port and a second oil port.

Images