Self-resetting oil cylinder

Abstract

The utility model discloses a self-resetting oil cylinder, which relates to the technical field of oil cylinders, and comprises a main body unit, a hydraulic unit arranged in the main body unit, a sealing unit arranged between the hydraulic unit and the main body unit, and a compensation unit arranged at the end part of the main body unit, the hydraulic unit comprises a piston piece arranged in the main body unit, a limiting cylinder installed at the end of the piston piece, a piston rod movably penetrating through the interior of the main body unit and fixedly connected with the piston piece, and a reset spring arranged between the piston piece and the inner side wall of the main body unit and arranged on the circumferential side face of the piston rod in a sleeving mode. According to the self-resetting oil cylinder, due to the arrangement of the hydraulic unit and the compensation unit, a shock absorber does not need to be additionally arranged; reset is achieved under the action of spring force, reset oil ports and pipelines do not need to be arranged, the installation space is simple, and a control system is simple.

Description

Technical Field

[0001] The utility model relates to the technical field of oil cylinders, in particular to a self-resetting oil cylinder. Background Art

[0002] The hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). It has a simple structure and reliable operation. When it is used to achieve reciprocating motion, the deceleration device can be eliminated, and there is no transmission gap and the movement is smooth. Therefore, it is widely used in the hydraulic systems of various machines. The self-steering cylinder configured on the steering axle usually has multiple oil ports to achieve operation and reset. At the same time, the self-steering cylinder also needs to be used in conjunction with the shock absorber to reduce vibration during steering.

[0003] The patent document CN 217177030 U discloses a high-efficiency vehicle oil cylinder, which relates to the field of hydraulic cylinders and includes a cylinder body, a first oil filling port and a second oil filling port are provided on the front end outer surface of the cylinder body, the first oil filling port is located on one side of the second oil filling port, a reinforcing rod is provided in the middle of the cylinder body, a fixing plate is provided on the outer surfaces of both ends of the cylinder body, and a piston rod is provided inside the cylinder body. In the high-efficiency vehicle oil cylinder described in the utility model, when the cleaning ring is in use, the piston rod passes through the cleaning ring, the annular scraper can scrape and clean the outer wall of the piston rod, and dust can be prevented from entering the cylinder body. When in use, the adsorption sponge can adsorb the surface of the piston rod passing through, and the piston rod can be prevented from bringing hydraulic fluid out of the cylinder body. When in use, the rubber bottom pad can play a buffering effect between the rubber column and the fixing plate, and can play an anti-skid effect through the anti-skid stripes when in use, which can increase the friction of the fixing plate and prevent loosening.

[0004] Although the above scheme can achieve an anti-slip effect through the anti-slip stripes when in use, and can increase the friction of the fixed plate to avoid loosening, the cylinder is prone to vibration during operation, and an additional shock absorber is required to reduce the vibration. For this reason, we propose a self-resetting cylinder. Utility Model Content

[0005] The main purpose of the utility model is to provide a self-resetting oil cylinder, which solves the problem that the oil cylinder is prone to vibration during operation and requires an additional shock absorber to reduce the vibration by providing a hydraulic unit and a compensation unit.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A self-resetting oil cylinder comprises a main body unit, a hydraulic unit arranged inside the main body unit, a sealing unit arranged between the hydraulic unit and the main body unit, and a compensation unit arranged at the end of the main body unit;

[0008] The hydraulic unit comprises a piston member arranged inside the main unit, a limiting cylinder installed at the end of the piston member, a piston rod movably passing through the main unit and fixedly connected to the piston member, and a return spring arranged between the piston member and the inner side wall of the main unit and sleeved on the peripheral side of the piston rod;

[0009] The compensation unit comprises an adjusting bolt threadedly mounted on the opposite ends of the piston rod and the piston member, and a locking nut movably mounted on the peripheral side of the adjusting bolt.

[0010] Preferably, the main unit comprises a cylinder body, and an end cover threadedly mounted on an end of the cylinder body.

[0011] Preferably, the main unit further comprises a flange mounted on a side wall of the cylinder body.

[0012] Preferably, the piston member comprises a piston body mounted on the inner wall of the cylinder body, and a limit pin mounted on the opposite end of the piston body and the piston rod.

[0013] Preferably, the hydraulic unit further comprises an oil nozzle installed on the side wall of the cylinder body and communicating with the interior of the cylinder body, and an oil hole opened on the side wall of the piston rod and communicating with the interior of the cylinder body.

[0014] Preferably, the sealing unit comprises a dust ring, an oil seal guide ring and a sealing member which are sequentially installed between the end cover and the piston rod.

[0015] Preferably, the sealing member comprises a sealing ring installed between the piston rod end cover and the cylinder body, and a plug body oil sealing member installed between the piston rod and the end cover and located on the inner side of the sealing ring.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] In the utility model, by setting the hydraulic unit and the compensation unit, when the oil cylinder is working, due to the built-in reset spring in the cylinder body, the vibration during operation can be reduced, so that when the oil cylinder is working, there is no need to additionally configure a shock absorber; it is reset by the spring force, and there is no need to configure a reset oil port and pipeline, so that the installation space is concise and the control system is simple; when it is necessary to install a self-resetting oil cylinder, after the oil cylinder is fixed by the flange, the adjusting bolt and the locking nut at the end of the piston rod can compensate for the assembly error and control the system more accurately; the adjusting bolt can be removed to directly connect to the external device, and an optional interface is provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0020] Figure 3 For this utility model Figure 2 A magnified schematic diagram of the structure I in the middle;

[0021] Figure 4 For this utility model Figure 2 Schematic diagram of the enlarged structure of middle II;

[0022] Figure 5 It is a left-side structural schematic diagram of the utility model.

[0023] In the figure:

[0024] 1. Main unit; 101. Cylinder body; 102. End cover; 103. Flange;

[0025] 2. Hydraulic unit; 201. Piston rod; 202. Piston member; 2021. Piston body; 2022. Limit pin; 203. Limit cylinder; 204. Return spring; 205. Oil nozzle;

[0026] 3. Sealing unit; 301. Dustproof ring; 302. Oil seal; 303. Guide ring; 304. Sealing element; 3041. Sealing ring; 3042. Plug body oil seal;

[0027] 4. Compensation unit; 401. Adjusting bolt; 402. Locking nut. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods. Example

[0029] like Figure 1 , Figure 2 , Figure 3 , Figure 4 as well as Figure 5 As shown, a self-resetting oil cylinder includes a main unit 1, a hydraulic unit 2 arranged inside the main unit 1, a sealing unit 3 arranged between the hydraulic unit 2 and the main unit 1, and a compensation unit 4 arranged at the end of the main unit 1;

[0030] like Figure 2 As shown, the hydraulic unit 2 includes a piston member 202 disposed inside the main unit 1, a limiting cylinder 203 installed at the end of the piston member 202, a piston rod 201 that movably passes through the main unit 1 and is fixedly connected to the piston member 202, and a return spring 204 that is disposed between the piston member 202 and the inner side wall of the main unit 1 and sleeved on the side surface of the piston rod 201. The limiting cylinder 203 serves as a maximum stroke limit of the oil cylinder on the one hand, and limits the radial movement range of the return spring 204 on the other hand;

[0031] like Figure 5 As shown, the compensation unit 4 includes an adjusting bolt 401 threadedly mounted on the opposite ends of the piston rod 201 and the piston member 202, and a locking nut 402 movably mounted on the side surface of the adjusting bolt 401. The locking nut 402 is used to lock the adjusting bolt 401 after it is adjusted into place.

[0032] like Figure 1 As shown, the main unit 1 includes a cylinder body 101 and an end cover 102 threadedly mounted on the end of the cylinder body 101. The arrangement of the end cover 102 can prevent the hydraulic oil inside the cylinder body 101 from overflowing.

[0033] like Figure 1 As shown, the main unit 1 further includes a flange 103 installed on the side wall of the cylinder body 101. The arrangement of the flange 103 facilitates the rapid installation of the cylinder body 101 and external equipment.

[0034] like Figure 4 As shown, the piston member 202 includes a piston body 2021 installed on the inner wall of the cylinder body 101, and a limit pin 2022 installed at the opposite end of the piston body 2021 and the piston rod 201. The setting of the limit pin 2022 can be used to limit the piston stroke.

[0035] like Figure 5 As shown, the hydraulic unit 2 also includes an oil nozzle 205 installed on the side wall of the cylinder body 101 and connected to the interior of the cylinder body 101, and an oil hole opened on the side wall of the piston rod 201 and connected to the interior of the cylinder body 101. After the oil nozzle 205 injects oil to soak the cylinder body 101, the oil can enter the piston rod 201 through the oil hole.

[0036] like Figure 3 As shown, the sealing unit 3 includes a dust ring 301, an oil seal 302, a guide ring 303 and a seal 304 which are sequentially installed between the end cover 102 and the piston rod 201. The setting of the dust ring 301 can prevent external dust from entering the interior of the cylinder body 101 through the gap between the end cover 102 and the piston rod 201.

[0037] like Figure 3 As shown, the seal 304 includes a sealing ring 3041 installed between the end cover 102 of the piston rod 201 and the cylinder body 101, and a plug body oil seal 3042 installed between the piston rod 201 and the end cover 102 and located on the inner side of the sealing ring 3041. The setting of the plug body oil seal 3042 can prevent hydraulic oil from infiltrating between the piston rod 201 and the end cover 102.

[0038] When the oil cylinder is working, the cylinder body 101 has a built-in reset spring 204, which can reduce the vibration during operation, so that no additional shock absorber is required when the oil cylinder is working; it is reset by spring force, and there is no need to configure a reset oil port and pipeline, which makes the installation space simple and the control system simple. Example

[0039] like Figure 1 , Figure 2 , Figure 3 , Figure 4 as well as Figure 5 As shown, a self-resetting oil cylinder includes a main unit 1, a hydraulic unit 2 arranged inside the main unit 1, a sealing unit 3 arranged between the hydraulic unit 2 and the main unit 1, and a compensation unit 4 arranged at the end of the main unit 1;

[0040] like Figure 2 As shown, the hydraulic unit 2 includes a piston member 202 disposed inside the main unit 1, a limiting cylinder 203 installed at the end of the piston member 202, a piston rod 201 that movably passes through the main unit 1 and is fixedly connected to the piston member 202, and a return spring 204 that is disposed between the piston member 202 and the inner side wall of the main unit 1 and sleeved on the side surface of the piston rod 201. The limiting cylinder 203 serves as a maximum stroke limit of the oil cylinder on the one hand, and limits the radial movement range of the return spring 204 on the other hand;

[0041] like Figure 5 As shown, the compensation unit 4 includes an adjusting bolt 401 threadedly mounted on the opposite ends of the piston rod 201 and the piston member 202, and a locking nut 402 movably mounted on the side surface of the adjusting bolt 401. The locking nut 402 is used to lock the adjusting bolt 401 after it is adjusted into place.

[0042] like Figure 1 As shown, the main unit 1 includes a cylinder body 101 and an end cover 102 threadedly mounted on the end of the cylinder body 101. The arrangement of the end cover 102 can prevent the hydraulic oil inside the cylinder body 101 from overflowing.

[0043] like Figure 1 As shown, the main unit 1 further includes a flange 103 installed on the side wall of the cylinder body 101. The arrangement of the flange 103 facilitates the rapid installation of the cylinder body 101 and external equipment.

[0044] like Figure 4 As shown, the piston member 202 includes a piston body 2021 installed on the inner wall of the cylinder body 101, and a limit pin 2022 installed at the opposite end of the piston body 2021 and the piston rod 201. The setting of the limit pin 2022 can be used to limit the piston stroke.

[0045] like Figure 5As shown, the hydraulic unit 2 also includes an oil nozzle 205 installed on the side wall of the cylinder body 101 and connected to the interior of the cylinder body 101, and an oil hole opened on the side wall of the piston rod 201 and connected to the interior of the cylinder body 101. After the oil nozzle 205 injects oil to soak the cylinder body 101, the oil can enter the piston rod 201 through the oil hole.

[0046] like Figure 3 As shown, the sealing unit 3 includes a dust ring 301, an oil seal 302, a guide ring 303 and a seal 304 which are sequentially installed between the end cover 102 and the piston rod 201. The setting of the dust ring 301 can prevent external dust from entering the interior of the cylinder body 101 through the gap between the end cover 102 and the piston rod 201.

[0047] like Figure 3 As shown, the seal 304 includes a sealing ring 3041 installed between the end cover 102 of the piston rod 201 and the cylinder body 101, and a plug body oil seal 3042 installed between the piston rod 201 and the end cover 102 and located on the inner side of the sealing ring 3041. The setting of the plug body oil seal 3042 can prevent hydraulic oil from infiltrating between the piston rod 201 and the end cover 102.

[0048] When the self-resetting oil cylinder needs to be installed, after the oil cylinder is fixed by the flange (103), the adjusting bolt (401) and the locking nut (402) at the end of the piston rod (201) can compensate for the assembly error and control the system more accurately; the adjusting bolt (401) can be removed to directly connect with external equipment, providing an optional interface.

[0049] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A self-resetting cylinder, comprising a main unit (1), characterized in that: It also includes a hydraulic unit (2) arranged inside the main unit (1), a sealing unit (3) arranged between the hydraulic unit (2) and the main unit (1), and a compensation unit (4) arranged at the end of the main unit (1); The hydraulic unit (2) comprises a piston member (202) arranged inside the main unit (1), a limiting cylinder (203) mounted on the end of the piston member (202), a piston rod (201) movably penetrating the inside of the main unit (1) and fixedly connected to the piston member (202), and a return spring (204) arranged between the piston member (202) and the inner side wall of the main unit (1) and sleeved on the peripheral side of the piston rod (201); The compensation unit (4) comprises an adjusting bolt (401) threadedly mounted on the opposite ends of the piston rod (201) and the piston member (202), and a locking nut (402) movably mounted on the side surface of the adjusting bolt (401).

2. A self-resetting oil cylinder according to claim 1, characterized in that: The main body unit (1) comprises a cylinder body (101) and an end cover (102) threadedly mounted on the end of the cylinder body (101).

3. A self-resetting oil cylinder according to claim 2, characterized in that: The main body unit (1) further comprises a flange (103) mounted on a side wall of the cylinder body (101).

4. A self-resetting oil cylinder according to claim 3, characterized in that: The piston member (202) comprises a piston body (2021) mounted on the inner wall of the cylinder body (101), and a limit pin (2022) mounted on the opposite end of the piston body (2021) and the piston rod (201).

5. The self-resetting oil cylinder according to claim 1, characterized in that: The hydraulic unit (2) further comprises an oil nozzle (205) mounted on the side wall of the cylinder body (101) and connected to the interior of the cylinder body (101), and an oil hole opened on the side wall of the piston rod (201) and connected to the interior of the cylinder body (101).

6. A self-resetting oil cylinder according to claim 2, characterized in that: The sealing unit (3) comprises a dust ring (301), an oil seal (302), a guide ring (303) and a sealing element (304) which are sequentially installed between the end cover (102) and the piston rod (201).

7. A self-resetting oil cylinder according to claim 6, characterized in that: The sealing member (304) comprises a sealing ring (3041) installed between the end cover (102) of the piston rod (201) and the cylinder body (101), and a plug body oil sealing member (3042) installed between the piston rod (201) and the end cover (102) and located inside the sealing ring (3041).

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