A reciprocating buffer hydraulic cylinder

Abstract

The present invention provides a reciprocating buffer hydraulic cylinder, which relates to the technical field of hydraulic cylinders, and mainly solves the problem that when the piston in the hydraulic cylinder performs reciprocating motion, the speed thereof cannot be controlled, resulting in collision with the guide sleeve inside the hydraulic cylinder, making the guide sleeve and the piston in the hydraulic cylinder easily damaged. An oil injection assembly is provided in both the rear end cover and the front end cover, and the oil injection assembly provided in the front end cover is located on the side wall of the main body, and the oil injection assembly includes an oil inlet, a flow pipe, a connecting pipe, a regulating valve, a diverter pipe, a lifting hydraulic rod and a blocking piston. An oil inlet is provided at the top of the oil injection assembly, a flow pipe is provided at the bottom of the oil inlet, a connecting pipe is provided at the top of the flow pipe near the piston, a diverter pipe is provided at one side of the flow pipe near the oil inlet, a regulating valve is provided at one end of the diverter pipe away from the flow pipe, a pipeline on the side of the regulating valve away from the diverter pipe is connected to the lifting hydraulic rod, and a blocking piston is provided at the bottom of the lifting hydraulic rod, and the blocking piston cooperates with the hollow part of the connecting pipe.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic cylinders, and in particular to a reciprocating buffer hydraulic cylinder. Background Art

[0002] A hydraulic cylinder refers to a device that pushes a piston to perform reciprocating motion through the pressure generated when hydraulic oil is injected. It is mostly used to drive equipment that needs to perform reciprocating motion. However, when the existing hydraulic cylinder injects hydraulic oil to drive the piston to perform reciprocating motion, the flow of the injected hydraulic oil cannot be accurately controlled and it is not convenient to reduce it. As a result, the speed of the piston does not change and slow down when it is squeezed by the hydraulic oil. When the piston performs reciprocating motion, it will directly hit the internal guide sleeve of the hydraulic cylinder, stop and reset, and the force and impact generated by the piston impact can easily damage the piston and the internal guide sleeve of the hydraulic cylinder. Summary of the invention

[0003] The purpose of the present invention is to provide a reciprocating buffer hydraulic cylinder to solve the problem that when the piston in the hydraulic cylinder performs reciprocating motion, its speed cannot be controlled and it will hit the internal guide sleeve of the hydraulic cylinder, making the internal guide sleeve and the piston of the hydraulic cylinder easily damaged.

[0004] The embodiments of the present invention are implemented by the following technical solutions:

[0005] The present invention provides a reciprocating buffer hydraulic cylinder, comprising a main body, a rear end cover and a front end cover are respectively arranged at both ends of the main body, a piston is connected inside the main body, oil injection components are arranged on the rear end cover and the front end cover, and the oil injection component arranged on the front end cover is located on the side wall of the main body, a mainstream pipeline is arranged inside the oil injection component, a diversion component is arranged on one side of the mainstream pipeline, the hydraulic oil in the mainstream pipeline is diverted by opening and closing the valve in the diversion component, a throttling component is arranged on one side of the diversion component, the throttling component is injected through the hydraulic oil diverted by the diversion component, the throttling component is slowly moved downward, and the mainstream pipeline is throttled when the piston is about to move and touch the inner wall of the main body, thereby slowing down the piston speed.

[0006] Preferably, the oil injection assembly includes a mainstream pipeline, a flow distribution assembly and a throttling assembly.

[0007] Preferably, the mainstream pipeline includes an oil inlet, a flow pipe and a connecting pipe. The flow pipe is a pipe connected to the bottom of the oil inlet, and the connecting pipe is a hollow pipe connected to the top of one end of the flow pipe.

[0008] Preferably, the flow diversion component includes a regulating valve and a flow diversion pipe. The flow diversion pipe is a pipeline arranged on one side of the regulating valve, and the flow diversion pipe is connected to the flow pipe.

[0009] Preferably, the throttling assembly includes a lifting hydraulic rod, a blocking piston and a sealing ring. The middle part of the lifting hydraulic rod is provided with a blocking piston, and the bottom side wall of the blocking piston is provided with a sealing ring.

[0010] Preferably, a rubber ring is provided on the side wall of the top protrusion of the barrier piston, and the rubber ring is arranged in the ring groove of the side wall of the barrier piston, and the side wall of the rubber ring is parallel to the side wall of the barrier piston.

[0011] Preferably, a gap is left between the top bulge of the blocking piston and the top of the inner cavity of the lifting hydraulic rod, and one end of the shunt pipe is connected to the gap between the top bulge of the blocking piston and the lifting hydraulic rod.

[0012] Preferably, the bottom portion of the blocking piston is embedded in the top end of the connecting tube.

[0013] Preferably, the barrier piston is further provided with a sealing ring, which is a circular ring arranged at the bottom of the barrier piston.

[0014] Preferably, the sealing ring is made of rubber material, and the sealing ring is arranged in the annular groove at the bottom edge of the blocking piston.

[0015] The technical solution of the embodiment of the present invention has at least the following advantages and beneficial effects:

[0016] 1. The oil injection assembly provided in the device can slow down the reciprocating impact speed of the piston in the hydraulic cylinder when it contacts and hits the guide sleeve inside the hydraulic cylinder during reciprocating motion, thereby preventing the piston from reciprocating too fast, resulting in excessive impact and causing damage to the piston and the internal guide sleeve of the hydraulic cylinder.

[0017] 2. The device is also provided with a regulating valve. By opening the regulating valve, the hydraulic oil can flow into the lifting hydraulic rod, driving the barrier piston to rise and fall to affect the flow rate. At the same time, the opening of the regulating valve allows the piston to reset itself when it moves back and forth, and then drives the barrier piston to rise and fall again, allowing the piston to extend smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a partial side cross-sectional structural schematic diagram of the rear end cover of the present invention;

[0021] Figure 3 For the present invention Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0022] Figure 4 It is a partial side cross-sectional structural schematic diagram of the front end cover of the present invention;

[0023] Figure 5 It is a front view structural schematic diagram of the front end cover of the present invention;

[0024] Icons: main body 1, rear end cover 101, front end cover 102, piston 2, oil inlet 3, flow pipe 301, connecting pipe 302, regulating valve 4, diverter pipe 401, lifting hydraulic rod 5, blocking piston 501, sealing ring 502. DETAILED DESCRIPTION

[0025] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] Combine the following Figures 1 to 5 The present invention is described in detail.

[0027] A reciprocating buffer hydraulic cylinder comprises a main body 1, a rear end cover 101 and a front end cover 102 are respectively arranged at both ends of the main body 1, a piston 2 is connected inside the main body 1, and is characterized in that an oil injection assembly is arranged on both the rear end cover 101 and the front end cover 102, and the oil injection assembly arranged on the front end cover 102 is located on the side wall of the main body 1, a mainstream pipeline is arranged inside the oil injection assembly, a diversion assembly is arranged on one side of the mainstream pipeline, the hydraulic oil in the mainstream pipeline is diverted by opening and closing the valve in the diversion assembly, a throttling assembly is arranged on one side of the diversion assembly, the throttling assembly is injected by the hydraulic oil diverted by the diversion assembly, the throttling assembly is slowly moved downward, and the mainstream pipeline is throttled when the piston 2 is about to move and touch the inner wall of the main body, thereby slowing down the speed of the piston 2.

[0028] The hydraulic oil in the mainstream pipeline is diverted by opening and closing the diversion component, and then the diverted hydraulic oil flows into the throttling component through the diversion component, so that the throttling component moves down slowly, and the mainstream pipeline is throttled when the piston 2 is about to move and touch the inner wall of the main body to slow down the speed of the piston 2.

[0029] Furthermore, the oil injection component includes a mainstream pipeline, a flow distribution component and a throttling component.

[0030] Furthermore, the mainstream pipeline includes an oil inlet 3, a flow pipe 301 and a connecting pipe 302. The flow pipe 301 is a pipe connected to the bottom of the oil inlet 3, and the connecting pipe 302 is a hollow pipe connected to the top of one end of the flow pipe 301.

[0031] The hydraulic oil flows from the oil inlet 3 into the flow pipe 301, passes through the connecting pipe 302, and then flows to the piston 2 to squeeze the piston 2 to move.

[0032] Furthermore, the flow diversion component includes a regulating valve 4 and a flow diversion pipe 401 . The flow diversion pipe 401 is a pipeline arranged on one side of the regulating valve 4 , and the flow diversion pipe 401 is connected to the flow pipe 301 .

[0033] Furthermore, the throttling assembly includes a lifting hydraulic rod 5, a blocking piston 501 and a sealing ring 502. The blocking piston 501 is arranged in the middle of the lifting hydraulic rod 5, and the sealing ring 502 is arranged on the bottom side wall of the blocking piston 501.

[0034] When hydraulic oil is injected into the oil inlet 3, the regulating valve 4 will be opened in advance, so that the regulating valve 4 is opened for a long time, so that part of the hydraulic oil flowing into the oil inlet 3 will flow into the shunt pipe 401 and enter the lifting hydraulic rod 5, so as to drive the blocking piston 501 in the lifting hydraulic rod 5 to descend and enter the connecting pipe 302 for engagement. When the blocking piston 501 moves along the connecting pipe 302, the flow in the flow pipe 301 will not be affected, so that the activity speed of the piston 2 will not be affected. Then, after the blocking piston 501 descends to a certain distance, the flow from the flow pipe 301 to the pipeline on the piston 2 will be A certain blockage is created to reduce the flow rate of the flow tube 301. At the same time, the movable position of the piston 2 is coordinated with the lifting speed of the piston 2, so that the flow rate of the flow tube 301 is reduced when the piston 2 is about to touch the guide sleeve inside the end of the main body 1, and the movable speed of the piston 2 is reduced, so that the piston 2 will not directly hit the guide sleeve inside the main body 1 to produce excessive impact, causing damage to the guide sleeve and piston 2 inside the main body 1. The oil injection components arranged at both ends of the main body 1 can slow down the piston 2 during the reciprocating motion to avoid damage to the two ends of the piston 2 and the two ends of the guide sleeve inside the main body 1.

[0035] Furthermore, a rubber ring is provided on the side wall of the top protrusion of the blocking piston 501 , and the rubber ring is arranged in the ring groove of the side wall of the blocking piston 501 , and the side wall of the rubber ring is parallel to the side wall of the blocking piston 501 .

[0036] The rubber ring arranged on the side wall of the blocking piston 501 can prevent the blocking piston 501 from being squeezed by the hydraulic oil and lifted along the inner cavity of the lifting hydraulic rod 5, and the injected hydraulic oil will not leak out from the side wall.

[0037] Furthermore, a gap is left between the top protrusion of the blocking piston 501 and the top of the inner cavity of the lifting hydraulic rod 5 , and one end of the shunt pipe 401 is connected to the gap between the top protrusion of the blocking piston 501 and the lifting hydraulic rod 5 .

[0038] Furthermore, the bottom portion of the blocking piston 501 is embedded in the top end of the connecting pipe 302 .

[0039] The bottom portion of the blocking piston 501 is embedded in the connecting pipe 302 , so that the blocking piston 501 can stably move along the connecting pipe 302 to block the flow port, while preventing hydraulic pressure from escaping from the connecting pipe 302 .

[0040] Furthermore, the barrier piston 501 is also provided with a sealing ring 502 , which is a circular ring provided at the bottom of the barrier piston 501 .

[0041] When the sealing ring 502 provided on the blocking piston 501 is able to squeeze and push the hydraulic oil in the connecting pipe 302 , the hydraulic oil will not leak out of the connecting pipe 302 from the side wall of the blocking piston 501 .

[0042] Furthermore, the sealing ring 502 is made of rubber material, and the sealing ring 502 is arranged in the annular groove at the bottom edge of the blocking piston 501 .

[0043] The following is a specific implementation process of the present invention. First, hydraulic oil is injected into the oil inlet 3 into the flow pipe 301, and flows to one side of the piston 2, allowing the piston 2 to move along the inner wall of the main body 1. At the same time, when the hydraulic oil is injected into the oil inlet 3, the regulating valve 4 will be opened in advance, so that the regulating valve 4 is opened for a long time, allowing the hydraulic oil to partially enter the cavity gap between the lifting hydraulic rod 5 and the blocking piston 501 through the diverter pipe 401, thereby squeezing the blocking piston 501 to move slowly downward along the cavity of the lifting hydraulic rod 5. When the blocking piston 501 slowly descends along the connecting pipe 302, when the blocking piston 501 descends a certain distance along the connecting pipe 302 to block the flow port of the flow pipe 301, the piston 2 is just about to extend its active position and is about to approach the end. Then, because the blocking piston 501 blocks the flow port of the flow pipe 301, the caliber is reduced, making the flow smaller, thereby controlling the flow of the hydraulic oil, allowing the piston 2 to The speed will be slowed down when it moves to the guide sleeve at the inner end of the main body 1 to avoid the impact and impact force caused by excessive speed to damage the guide sleeve and piston 2 inside the main body 1. Then, when the piston 2 moves to the end, the oil injection assembly at the other end of the main body 1 will also inject hydraulic oil, thereby pushing the piston 2 to reset and move. At the same time, the blocking piston 501 in the oil injection assembly will slow down the piston 2 when it reaches the end, so that the piston 2 can be slowed down to a certain extent when it reciprocates, avoiding damage to the piston 2 and the guide sleeve inside the main body 1 during the reciprocating movement of the piston 2. Finally, the reset of the piston 2 will squeeze the hydraulic oil to flow back from the flow pipe 301 in the rear end cover 101, and because the oil inlet 3 on the rear end cover 101 stops supplying oil, the hydraulic oil will squeeze the blocking piston 501 to rise when it flows back from the flow pipe 301, and the hydraulic oil in the lifting hydraulic rod 5 will flow back and reset, thereby completing the reciprocating movement of the piston 2.

[0044] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A reciprocating buffer hydraulic cylinder, comprising a main body (1), wherein the two ends of the main body (1) are respectively provided with a rear end cover (101) and a front end cover (102), and the main body (1) is internally connected with a piston (2), characterized in that: The rear end cover (101) and the front end cover (102) are both provided with an oil injection assembly, and the oil injection assembly provided on the front end cover (102) is located on the side wall of the main body (1), a main flow pipeline is provided inside the oil injection assembly, a diversion assembly is provided on one side of the main flow pipeline, and hydraulic oil in the main flow pipeline is diverted by opening and closing a valve in the diversion assembly, and a throttling assembly is provided on one side of the diversion assembly, and the throttling assembly is injected through the hydraulic oil diverted by the diversion assembly, so that the throttling assembly moves slowly downward, and throttling the main flow pipeline when the piston (2) is about to move and touch the inner wall of the main body, thereby slowing down the speed of the piston (2); The flow splitting component comprises a regulating valve (4) and a flow splitting pipe (401); the flow splitting pipe (401) is a pipe arranged on one side of the regulating valve (4), and the flow splitting pipe (401) is connected to the flow pipe (301); The throttling assembly comprises a lifting hydraulic rod (5), a blocking piston (501) and a sealing ring (502); the blocking piston (501) is arranged in the middle of the lifting hydraulic rod (5), and the sealing ring (502) is arranged on the side wall of the bottom of the blocking piston (501); A gap is left between the top protrusion of the blocking piston (501) and the top of the inner cavity of the lifting hydraulic rod (5), and one end of the diverter pipe (401) is connected to the gap between the top protrusion of the blocking piston (501) and the lifting hydraulic rod (5); The bottom portion of the blocking piston (501) is embedded in the top end of the connecting tube (302).

2. A reciprocating buffer hydraulic cylinder according to claim 1, characterized in that: The oil injection component includes a main flow pipeline, a flow distribution component and a throttling component.

3. The reciprocating buffer hydraulic cylinder according to claim 1, characterized in that: The main flow pipeline comprises an oil inlet (3), a flow pipe (301) and a connecting pipe (302); the flow pipe (301) is a pipe connected to the bottom of the oil inlet (3); and the connecting pipe (302) is a hollow pipe connected to the top of one end of the flow pipe (301).

4. The reciprocating buffer hydraulic cylinder according to claim 1, characterized in that: A rubber ring is provided on the side wall of the top protrusion of the barrier piston (501), and the rubber ring is arranged in a ring groove on the side wall of the barrier piston (501), and the side wall of the rubber ring is parallel to the side wall of the barrier piston (501).

5. The reciprocating buffer hydraulic cylinder according to claim 1, characterized in that: The barrier piston (501) is further provided with a sealing ring (502), and the sealing ring (502) is a circular ring arranged at the bottom of the barrier piston (501).

6. A reciprocating buffer hydraulic cylinder according to claim 5, characterized in that: The sealing ring (502) is made of rubber material, and the sealing ring (502) is arranged in the circular groove at the bottom edge of the blocking piston (501).

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