Lifting buffer speed regulation oil cylinder

Abstract

The utility model discloses a lifting buffer speed regulation oil cylinder, which belongs to the technical field of oil cylinders, and comprises a cylinder body, the lower end of the cylinder body is fixedly connected with a cylinder bottom, the upper end of the cylinder body is fixedly connected with a cylinder cover, a piston rod capable of moving up and down is arranged in the cylinder body, and the piston rod is in sliding connection with the inner side of the cylinder cover. The upper end of the piston rod is fixedly connected with a rod head, and the lower end of the piston rod is provided with a piston block; and the buffering mechanism is used for applying a buffering effect to the piston block. In order to solve the use problem, the equipment is provided with the buffer mechanism, in the downward moving process of the piston rod, the downward moving speed of the piston block can be reduced through throttling conveying of a throttling opening to hydraulic oil and cooperation of the acting force of a spring, impact and vibration generated by the piston block are reduced, and the safety of the whole equipment is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, and in particular to a lifting, buffering, and speed-regulating hydraulic cylinder. Background Technology

[0002] A hydraulic cylinder is a device that uses fluid pressure to drive mechanical devices. It can withstand heavy loads and provide stable lifting effects, playing an important role in many industrial fields, such as lifting equipment in automobile repair shops and cranes in construction projects.

[0003] During operation, existing hydraulic cylinders cause the piston to impact the inner bottom of the cylinder at a high speed whenever the piston rod moves towards the inner bottom of the cylinder, resulting in huge impacts and vibrations. These impacts and vibrations affect the safe operation of various components inside the cylinder, and consequently affect the stability and reliability of the entire hydraulic system. Therefore, to solve this problem, designing a lifting buffer speed regulating hydraulic cylinder is something we need to consider. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a lifting buffer speed regulating cylinder. In terms of usage, it is equipped with a buffer mechanism. During the downward movement of the piston rod, the hydraulic oil is throttled through the throttling orifice, and the force of the spring can slow down the downward movement rate of the piston block, reduce the impact and vibration generated by the piston block, and ensure the safety of the entire equipment.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A lifting and buffering speed regulating cylinder includes a cylinder body, a cylinder bottom fixedly connected to the lower end of the cylinder body, a cylinder head fixedly connected to the upper end of the cylinder body, a piston rod movable up and down disposed inside the cylinder body, the piston rod being slidably connected to the inner side of the cylinder head, a rod head fixedly connected to the upper end of the piston rod, and a piston block disposed at the lower end of the piston rod; and a buffering mechanism for applying a buffering effect to the piston block.

[0007] Preferably, the buffer mechanism includes a buffer valve seat disposed below the piston block. The lower end of the piston block has a circular inner groove. The top of the circular inner groove and the upper end of the buffer valve seat are elastically connected by a spring. An oil supply pipe is provided through the middle of the buffer valve seat. The upper end of the oil supply pipe passes through the piston block and extends into the piston rod.

[0008] Preferably, the oil pipe is slidably connected to the piston block, and a throttling orifice is provided between the upper end of the piston block and the inner top of the circular inner groove.

[0009] Preferably, the lower end of the oil delivery pipe is provided with a first annular seal, and the upper end of the buffer valve seat is provided with a second annular seal.

[0010] Preferably, the left side of the cylinder bottom is provided with an oil inlet, and the other end of the oil inlet extends to the inner bottom of the cylinder body.

[0011] Preferably, the right side of the rod head is provided with an oil return port, and the other end of the oil return port extends to the inner top of the piston rod, and a two-position two-way electromagnetic valve is arranged in the oil return port.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] The buffer mechanism is arranged, when the lower end of the buffer valve seat contacts the inner bottom of the cylinder body in the process that the piston rod moves downward, the first annular seal can deliver the hydraulic oil of the oil delivery pipe, so that the hydraulic oil can be delivered only through the throttle, and when the spring is compressed under force, the action force can effectively slow down the movement rate of the piston block, thereby reducing the impact and vibration generated by the piston block at the end of the stroke, and ensuring the safety of the whole equipment during operation. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 A structure diagram of the utility model is provided;

[0015] Figure 2 A Figure 1 sectional view;

[0016] Figure 3 A Figure 2 enlarged view of A;

[0017] Figure 4 A Figure 2 enlarged view of B.

[0018] In the drawing: 1 cylinder body, 2 cylinder bottom, 3 cylinder cover, 4 piston rod, 5 rod head, 6 piston block, 7 buffer valve seat, 8 spring, 9 oil delivery pipe, 10 throttle, 11 first annular seal, 12 second annular seal, 13 oil inlet, 14 oil return port, 15 two-position two-way electromagnetic valve. DETAILED DESCRIPTION

[0019] The technical scheme in the utility model embodiments will be clearly and completely described below with reference to the drawings in the utility model embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0020] Referring to Figures 1-4The utility model relates to a kind of lifting buffer speed regulating oil cylinder, including cylinder body 1, the lower end of cylinder body 1 is fixedly connected with cylinder bottom 2, the upper end of cylinder body 1 is fixedly connected with cylinder cover 3, multiple sealing elements (not shown) are arranged between cylinder cover 3 and cylinder body 1 and between cylinder cover 3 and piston rod 4, piston rod 4 is arranged in cylinder body 1 and can move up and down, piston rod 4 is slidably connected with the inside of cylinder cover 3, the upper end of piston rod 4 is fixedly connected with stem 5, the lower end of piston rod 4 is provided with piston block 6;

[0021] Wherein, it further includes buffer mechanism, buffer mechanism is used to exert buffering effect to piston block 6, buffer mechanism includes buffer valve seat 7 being arranged below piston block 6, circular inner groove is opened in the lower end of piston block 6, and the inner top of circular inner groove and the upper end of buffer valve seat 7 are elastically connected by spring 8 ( Figure 3 The spring 8 shown is in a compressed state), buffer valve seat 7 is fixedly connected with the lower end portion of oil delivery pipe 9, and the upper end of oil delivery pipe 9 penetrates piston block 6 and extends into piston rod 4, oil delivery pipe 9 is slidably connected with piston block 6, throttle 10 is arranged between the upper end of piston block 6 and the inner top of circular inner groove, the upper end portion of throttle 10 is smaller in diameter, and can play a better throttling buffering effect, the lower end of oil delivery pipe 9 is provided with first annular sealing element 11, and the upper end of buffer valve seat 7 is provided with second annular sealing element 12;

[0022] Wherein, the left side of cylinder bottom 2 is provided with oil inlet 13, the other end of oil inlet 13 extends to the inner bottom of cylinder body 1, the right side of stem 5 is provided with oil return port 14, the other end of oil return port 14 extends to the inner top of piston rod 4, two-position two-way electromagnetic valve 15 is arranged in oil return port 14, and the two-position two-way electromagnetic valve 15 is used to control the opening and closing of oil return port 14.

[0023] In the utility model, in use, two-position two-way electromagnetic valve 15 in oil return port 14 is opened, then hydraulic oil is filled to the inner bottom of cylinder body 1 through oil inlet 13, during the filling process, piston block 6 is moved upwards under the extrusion of hydraulic oil, drives piston rod 4, stem 5, buffer valve seat 7 and oil delivery pipe 9 to move upwards synchronously, spring 8 is released from compression state during moving upwards, so that the upper end of buffer valve seat 7 is separated from the lower end of piston block 6, subsequent hydraulic oil is transported into piston rod 4 through the lower end of oil delivery pipe 9 and throttle 10 (the flow of hydraulic oil here can be basically ignored) and is finally transported into mailbox through oil return port 14;

[0024] When the hydraulic oil flows back through the oil return port 14, the piston rod 4, the rod head 5, the buffer valve seat 7 and the oil delivery pipe 9 will move down synchronously, during the moving down, when the lower end of the buffer valve seat 7 contacts with the inner bottom of the cylinder body 1, the buffer valve seat 7 and the oil delivery pipe 9 will stop moving down, and the first annular seal 11 will interrupt the hydraulic oil delivery of the oil delivery pipe 9, at this time the hydraulic oil in the piston rod 4 can only be delivered to the inner bottom of the cylinder body 1 through the throttle port 10, because the upper end of the throttle port 10 has a small diameter, it can play a good throttling buffer effect, combined with the compression force of the spring 8, so as to reduce the moving down speed of the piston block 6, the subsequent piston rod 4 and piston block 6 will continue to move down, until the lower end of the piston block 6 is attached to the upper end of the buffer valve seat 7, at this time the second annular seal 12 will interrupt the hydraulic oil delivery of the throttle port 10, so it completes a round of operation, the whole operation process slows down the movement speed of the piston block 6, reduces the impact and vibration generated by the piston block 6 at the end of the stroke, improves the safety of the whole equipment.

[0025] The above merely describes a preferred embodiment of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art, according to the technical scheme and the inventive concept of the present application, can make equivalent replacement or change within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A lift cushioning and speed regulating oil cylinder characterized by, Include: The lower end of the cylinder (1) is fixedly connected with cylinder bottom (2), the upper end of the cylinder (1) is fixedly connected with cylinder cover (3), the cylinder (1) is provided with the piston rod (4) that can move up and down, the piston rod (4) is connected with the inner side of cylinder cover (3) slidingly, the upper end of the piston rod (4) is fixedly connected with rod head (5), the lower end of the piston rod (4) is provided with piston block (6); Buffer mechanism, the buffer mechanism is used for the piston block (6) is applied to the buffer effect, the buffer mechanism includes the buffer valve seat (7) that is arranged below the piston block (6), the lower end of the piston block (6) is opened with circular inner groove, the inner top of the circular inner groove and the upper end of buffer valve seat (7) are elastically connected by spring (8), the middle part of buffer valve seat (7) is throughly provided with oil pipe (9), the upper end of oil pipe (9) is throughly extended to the piston rod (4) in the piston block (6), the oil pipe (9) is connected with the piston block (6) slidingly, the upper end of the piston block (6) and the inner top of the circular inner groove are provided with throttle (10).

2. The lift cushion governor cylinder according to claim 1, wherein, The lower end of the oil pipe (9) is provided with the first annular sealing element (11), and the upper end of the buffer valve seat (7) is provided with the second annular sealing element (12).

3. The lift cushion governor cylinder of claim 1 wherein, The left side of the cylinder bottom (2) is provided with oil inlet (13), and the other end of the oil inlet (13) extends to the inner bottom of the cylinder (1).

4. The lift cushion governor cylinder of claim 1 wherein, The right side of the rod head (5) is provided with oil return port (14), and the other end of the oil return port (14) extends to the inner top of the piston rod (4), and the oil return port (14) is provided with two-position two-way electromagnetic valve (15).

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