Oil cylinder buffering device

Abstract

The utility model discloses an oil cylinder buffering device, and relates to the field of lorry-mounted crane air cylinders. An oil cylinder buffering device comprises a cylinder body, a slidable piston is arranged in the cylinder body, a piston rod is arranged at one end of the piston, and hollow structures are arranged in the piston and the piston rod. The supporting part is arranged at one end of the cylinder body and is used for blocking and limiting the end part of the cylinder body; the small hole or the thin seam of the throttling valve is arranged in the cylinder body, the flowing speed and pressure of oil can be effectively adjusted, so that stable braking and starting of a moving part are achieved, when the stroke of a piston is close to the end point, the closed part of oil is extruded out through the small hole or the thin seam of the throttling valve, resistance is generated, the moving part is gradually decelerated, and the braking speed of the moving part is increased. Meanwhile, when the hydraulic oil cylinder is started, hydraulic oil slowly enters a rodless cavity through a small hole or a gap of the throttling valve, the flow is gradually increased, and stable starting is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of truck-mounted crane cylinders, and in particular relates to an oil cylinder buffer device. Background Art

[0002] Among the many components of a crane, the hydraulic cylinder plays a vital role. The hydraulic cylinder is a device that uses liquid to transmit pressure and is a mechanical actuator that achieves linear or rotary motion through the pressure conversion of hydraulic oil.

[0003] In the prior art, during the operation of the oil cylinder, the piston rod drives the piston to reciprocate in the cylinder body through the transmission parts. The traditional oil cylinder does not have a buffer protection device at one end of the cylinder body. As the moving parts are braked, the piston contacts and collides with the bottom of the cylinder, thereby affecting the service life of the oil cylinder, increasing the occurrence of faults, and reducing the smoothness of the operation of the oil cylinder. Therefore, we propose a cylinder buffer device to solve the above-mentioned problems. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide an oil cylinder buffer device which can overcome the above problems or at least partially solve the above problems.

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the utility model is: a cylinder buffer device, including a cylinder body, a slidable piston is arranged inside the cylinder body, a piston rod is arranged at one end of the piston, and hollow structures are arranged inside the piston and the piston rod; a support part is arranged at one end of the cylinder body, which is used to seal and limit the end of the cylinder body; wherein a buffer part is embedded and installed on the support part, which is used to buffer and protect the piston.

[0006] Furthermore, the support portion includes a cylinder bottom installed at one end of the cylinder body, a cylinder bottom baffle is installed on one side of the cylinder bottom, and the cylinder bottom baffle is fixedly connected to the cylinder body.

[0007] Furthermore, the buffer comprises a throttle valve installed at one end of the cylinder body, one end of the throttle valve is convex, one end of the throttle valve is provided with a liquid inlet groove, and the inner wall of the liquid inlet groove is provided with a liquid outlet.

[0008] Furthermore, the hollow structure includes a first liquid inlet channel opened inside the piston, a second liquid inlet channel is opened inside the piston rod, and the first liquid inlet channel and the second liquid inlet channel are connected as a whole.

[0009] Furthermore, a sealing ring is sleeved on the surface of the throttle valve, and the surface of the sealing ring is tightly fitted with the cylinder bottom.

[0010] Furthermore, one end of the throttle valve is adapted to the piston and the second liquid inlet passage in the piston rod.

[0011] Furthermore, a through hole is opened on the central axis of the cylinder bottom, and a gap is left between the through hole and the throttle valve.

[0012] Furthermore, the liquid outlet portion is a liquid outlet hole, which is ring-shaped and evenly spaced on the liquid inlet groove.

[0013] After adopting the above technical scheme, the utility model has the following beneficial effects compared with the prior art: the utility model can effectively adjust the flow speed and pressure of the oil by setting a small hole or a slit of the throttle valve in the cylinder body, thereby realizing smooth braking and starting of the moving parts. When the piston stroke approaches the end point, the closed part of the oil is squeezed out through the small hole or the slit of the throttle valve, generating resistance, so that the moving parts gradually slow down and avoid collision and impact with the cylinder head. At the same time, when the hydraulic cylinder is started, the hydraulic oil slowly enters the rodless chamber through the small hole or the slit of the throttle valve, gradually increasing the flow rate and realizing smooth starting.

[0014] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In the attached picture:

[0016] Figure 1 This is a schematic diagram of the overall structure of an oil cylinder buffer device proposed by the utility model;

[0017] Figure 2 A cylinder buffer device proposed by the utility model Figure 1 A schematic diagram of the enlarged structure of the middle A area;

[0018] Figure 3 The utility model is a schematic diagram of a partial cross-sectional structure of a buffer component in an oil cylinder buffer device.

[0019] In the figure: 1. cylinder body; 101. piston; 1011. first liquid inlet channel; 102. piston rod; 1012. second liquid inlet channel; 2. support part; 201. cylinder bottom; 202. cylinder bottom baffle; 3. buffer part; 301. throttle valve; 302. liquid inlet groove; 303. liquid outlet; 4. sealing ring; 5. through hole. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0021] Embodiment 1:

[0022] Reference Figure 1-Figure 3 A cylinder buffer device includes a cylinder body 1, a slidable piston 101 is arranged inside the cylinder body 1, a piston rod 102 is arranged at one end of the piston 101, and hollow structures are arranged in the piston 101 and the piston rod 102; a support part 2 is arranged at one end of the cylinder body 1, which is used to block and limit the end of the cylinder body 1; wherein a buffer part 3 is embedded and installed on the support part 2, which is used to buffer and protect the piston 101.

[0023] In the utility model, when the piston 101 approaches the end point of its stroke, a part of the oil is sealed between the piston 101 and the cylinder body 1. When the piston 101 slides, the oil is forced to pass through the small holes or slits provided on the buffer 3 and squeezed out, generating great resistance, so that the moving parts are braked and gradually reduce the speed, so as to achieve the purpose of avoiding the mutual collision and impact between the piston 101 and the support part 2, and play a good buffering effect. At the same time, when the hydraulic cylinder starts to start from the contracted state, the hydraulic oil slowly enters the rodless cavity in the cylinder body 1 through the small hole or gap of the throttle valve 301 on the buffer 3, and gradually increases, so as to achieve the purpose of smooth starting of the hydraulic cylinder and improve the overall stability of the cylinder.

[0024] Embodiment 2:

[0025] Reference Figure 1-Figure 3 , a cylinder buffer device, which is basically the same as embodiment 1, and further comprises:

[0026] The support part 2 includes a cylinder bottom 201 installed at one end of the cylinder body 1, a cylinder bottom baffle 202 is installed on one side of the cylinder bottom 201, and the cylinder bottom baffle 202 is fixedly connected to the cylinder body 1. The buffer 3 includes a throttle valve 301 installed at one end of the cylinder body 1, one end of the throttle valve 301 is convex, and one end of the throttle valve 301 is provided with a liquid inlet groove 302, and the inner wall of the liquid inlet groove 302 is provided with a liquid outlet 303. The hollow structure includes a first liquid inlet channel 1011 opened inside the piston 101, and a second liquid inlet channel 1011 is opened inside the piston rod 102. The liquid inlet channel 1012, the first liquid inlet channel 1011 and the second liquid inlet channel 1012 are connected as a whole, the surface of the throttle valve 301 is sleeved with a sealing ring 4, the surface of the sealing ring 4 is tightly fitted with the cylinder bottom 201, one end of the throttle valve 301 is adapted to the second liquid inlet channel 1012 in the piston 101 and the piston rod 102, the central axis of the cylinder bottom 201 is provided with a through hole 5, and a gap is left between the through hole 5 and the throttle valve 301, and the liquid outlet part 303 is a liquid outlet hole, which is ring-shaped and evenly spaced on the liquid inlet groove 302.

[0027] In the utility model, the support part 2 can seal and limit one end of the cylinder body 1, and the setting of the cylinder bottom baffle 202 plays an effect of increasing the support and limiting, avoiding leakage of hydraulic oil caused by excessive impact force. When the piston 101 slides to the right, the hydraulic oil in the rodless cavity in the cylinder body 1 is squeezed, and the hydraulic oil is squeezed into the liquid inlet groove 302 and discharged through the liquid outlet holes distributed thereon, so that the hydraulic oil flows out slowly, which plays a buffering effect on the piston 101 and avoids direct collision with the cylinder bottom 201. The setting of the sealing ring 4 facilitates the surface sealing effect of the throttle valve 301 installed on the cylinder bottom 201, and avoids the hydraulic oil from escaping from the gap between the cylinder bottom 201 and the throttle valve 301 through the through hole 5. One end of the throttle valve 301 conflicts with the cylinder bottom baffle 202, further playing a limiting role and maintaining the stability of the structure. The through oil pipe composed of the first liquid inlet channel 1011 and the second liquid inlet channel 1012 facilitates the injection of hydraulic oil into the rodless cavity in the cylinder body 1.

[0028] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment, it is not intended to limit the present invention.

Claims

1. A cylinder buffer device, characterized in that: It comprises a cylinder body (1), a slidable piston (101) is arranged inside the cylinder body (1), and a piston rod (102) is arranged at one end of the piston (101). The piston (101) and the piston rod (102) are both provided with a hollow structure; A support portion (2) provided at one end of the cylinder body (1) and used to block and limit the end of the cylinder body (1); Wherein, a buffer component (3) is embedded and installed on the support portion (2) and is used for buffering and protecting the piston (101).

2. The oil cylinder buffer device according to claim 1, characterized in that: The support portion (2) comprises a cylinder bottom (201) mounted on one end of the cylinder body (1), a cylinder bottom baffle (202) being mounted on one side of the cylinder bottom (201), and the cylinder bottom baffle (202) being fixedly connected to the cylinder body (1).

3. The oil cylinder buffer device according to claim 1, characterized in that: The buffer member (3) comprises a throttle valve (301) mounted on one end of the cylinder body (1); one end of the throttle valve (301) is convex; one end of the throttle valve (301) is provided with a liquid inlet groove (302); and an inner wall of the liquid inlet groove (302) is provided with a liquid outlet portion (303).

4. The oil cylinder buffer device according to claim 1, characterized in that: The hollow structure comprises a first liquid inlet channel (1011) opened inside the piston (101), a second liquid inlet channel (1012) opened inside the piston rod (102), and the first liquid inlet channel (1011) and the second liquid inlet channel (1012) are connected as a whole.

5. The oil cylinder buffer device according to claim 3, characterized in that: A sealing ring (4) is sleeved on the surface of the throttle valve (301), and the surface of the sealing ring (4) is tightly fitted to the cylinder bottom (201).

6. The oil cylinder buffer device according to claim 5, characterized in that: One end of the throttle valve (301) is adapted to the piston (101) and the second liquid inlet passage (1012) in the piston rod (102).

7. The oil cylinder buffer device according to claim 2, characterized in that: A through hole (5) is provided on the central axis of the cylinder bottom (201), and a gap is left between the through hole (5) and the throttle valve (301).

8. The oil cylinder buffer device according to claim 3, characterized in that: The liquid outlet portion (303) is a liquid outlet hole, which is in a ring shape and is distributed at equal intervals on the liquid inlet groove (302).

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