CN220770030U - A spring type oil pressure buffer - Google Patents

Abstract

The invention discloses a spring type oil pressure buffer, which relates to the field of buffer shock absorption, comprising a cylinder, wherein the cavity inside the cylinder is filled with hydraulic oil, the middle part of the cylinder is slidably connected with a damping slide column, and the opening at the top end is threadedly connected with a cylinder end cap, a spring one is provided at each of the upper and lower ends of the damping slide column, the damping slide column is provided with an oil passage running through it, a buffer guide rod is fixedly connected to the cylinder end cap, the buffer guide rod passes through a buffer guide sleeve and is slidably connected to it, a spring two is sleeved on the buffer guide rod below the buffer guide sleeve, the interior of the cylinder in the utility model is completely sealed, and the reciprocating motion of the piston rod inside and outside the cylinder is avoided, which avoids the leakage of hydraulic oil on the one hand, and does not accumulate external dust at the sliding part on the other hand, and has the advantages of simple structure, reliable operation, convenient integration, low maintenance cost, etc.

Description

A spring type oil pressure buffer

Technical Field

The invention relates to the field of buffering and shock absorption, and in particular to a spring type oil pressure buffer.

Background technique

The vehicle's hydraulic shock absorber uses the liquid turbulence generated by the flow of oil in the gap to absorb energy. However, the current hydraulic shock absorber adopts an open structure. The piston rod and the end of the cylinder are repeatedly rubbed against each other, and sometimes hydraulic oil leakage occurs at the sliding point. In addition, the piston rod is exposed to the outside, and after it sticks to dust, it will accumulate dust at the sliding point when it retracts into the cylinder, causing uneven sliding and inconvenient maintenance.

Therefore, it is necessary to provide a buffer device that can avoid oil leakage, work reliably, have a simple structure, be easy to integrate, and have low maintenance costs.

Utility Model Content

The purpose of the utility model is to provide a spring type oil pressure buffer to solve the problems mentioned in the above background technology.

A spring-type oil pressure buffer comprises a cylinder, wherein the cavity inside the cylinder is filled with hydraulic oil, a damping slide column is slidably connected to the middle part of the cylinder, and a cylinder end cap is threadedly connected to the opening at the top end, a spring 1 is provided at each of the upper and lower ends of the damping slide column, an oil passage and an oil groove are provided on the damping slide column, a buffer guide rod is fixedly connected to the cylinder end cap, the buffer guide rod passes through a buffer guide sleeve and is slidably connected to the buffer guide sleeve, and a spring 2 is sleeved on the buffer guide rod below the buffer guide sleeve.

Preferably, a buffer connecting end is fixedly connected to the buffer guide sleeve, and a connecting portion is fixedly connected to the bottom of the cylinder.

Preferably, a sealing ring is provided between the cylinder end cap and the cylinder barrel.

Preferably, the buffer guide rod is embedded in the cylinder end cap and is fixedly connected to the cylinder end cap by screw reinforcement.

Preferably, the number of the oil passages is at least one, the diameter of the oil passages is larger at the top and smaller at the bottom, and a plurality of the oil grooves are provided and are evenly distributed on the outer circumferential wall of the damping sliding column.

Preferably, an oil filling hole is provided on the cylinder end cap, and an end cap screw plug is threadedly connected to the oil filling hole.

The advantages of the utility model are: the interior of the cylinder in the utility model is completely sealed to prevent the piston rod from reciprocating in and out of the cylinder, thereby avoiding leakage of hydraulic oil on the one hand and preventing external dust from accumulating in the sliding part on the other hand, and having the advantages of simple structure, reliable operation, convenient integration and low maintenance cost.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a general cross-sectional view of the present utility model;

FIG. 2 is a schematic diagram of the installation and application of the utility model.

In the figure: 1. cylinder barrel; 11. connecting part; 2. damping slide column; 21. oil channel; 22. oil groove; 3. cylinder end cap; 4. spring 1; 5. buffer guide rod; 6. buffer guide sleeve; 61. buffer connecting end; 7. spring 2; 8. sealing ring; 9. screw; 10. end cap screw plug.

Detailed ways

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 explained below in conjunction with specific implementation methods.

As shown in Figures 1 and 2, a spring-type oil pressure buffer includes a cylinder 1, wherein the cavity inside the cylinder 1 is filled with hydraulic oil, a damping slide column 2 is slidably connected to the middle of the cylinder 1, and a cylinder end cap 3 is threadedly connected to the opening at the top thereof, a spring 1 4 is provided at both upper and lower ends of the damping slide column 2, so that the damping slide column 2 is suspended in the middle of the cylinder 1, an oil passage 21 and an oil groove 22 are provided on the damping slide column 2, a buffer guide rod 5 is fixedly connected to the cylinder end cap 3, the buffer guide rod 5 passes through a buffer guide sleeve 6 and is slidably connected thereto, and a spring 2 7 is sleeved on the buffer guide rod 5 below the buffer guide sleeve 6.

In this embodiment, a buffer connecting end 61 is fixedly connected to the buffer guide sleeve 6, and a connecting portion 11 is fixedly connected to the bottom of the cylinder barrel 1. The buffer connecting end 61 is connected to the vehicle frame, and the connecting portion 11 is connected to the vehicle axle.

In this embodiment, a sealing ring 8 is provided between the cylinder end cap 3 and the cylinder barrel 1 .

In this embodiment, the cylinder end cap 3 is provided with an oil filling hole, and the oil filling hole is threadedly connected with an end cap screw plug 10. Oil is injected into the cylinder barrel 1 through the oil filling hole, and then the end cap screw plug 10 is used for sealing.

In this embodiment, the buffer guide rod 5 is embedded in the cylinder end cap 3 and is reinforced by screws 9 to achieve a fixed connection with the cylinder end cap 3 .

In this embodiment, the number of the oil passage 21 is at least one, the diameter of the oil passage 21 is larger at the top and smaller at the bottom, and a plurality of oil grooves 22 are provided and evenly distributed on the outer circumferential wall of the damping sliding column 2 .

Working process and principle:

When the utility model is used, the inner cavity of the cylinder 1 is filled with hydraulic oil in advance, and the damping slide column 2 is suspended in the middle of the cavity through the spring 14, and the connecting part 11 and the buffer connecting end 61 are respectively connected to the axle and the frame, so that the vehicle body and the frame are suspended on the axle through the buffer.

When the vehicle encounters a bump on the ground or an impact on the vehicle body during driving, the cylinder 1 drives the buffer guide rod 5 to move upward, and the spring 27 is compressed, reducing part of the impact energy. In this process, the damping slide column 2 attempts to maintain its original position in the vertical direction due to inertia, so the damping slide column 2 moves downward relative to the upward cylinder 1, and the chamber below the damping slide column 2 in the cylinder 1 and the spring 14 on the lower side are compressed. The hydraulic oil in the lower chamber is compressed and flows to the chamber above the damping slide column 2 through the oil channel 21 and the oil groove 22. In this process, the flow of the hydraulic oil is blocked, resulting in friction between the fluid and the fluid and internal friction of the fluid, which is converted into heat energy, thereby offsetting part of the impact energy.

At the same time, since the bell mouth of the oil passage 21 has a cross-section that is larger at the top and smaller at the bottom, when the hydraulic oil moves from a smaller diameter to a larger diameter, the resistance of the hydraulic oil will decrease, allowing the hydraulic oil to flow upward at a faster speed.

When the impact ends, spring 2 7 and spring 1 4 begin to reset, and the buffer guide rod 5 and cylinder 1 reset downward. At this time, the damping slide column 2 still attempts to maintain its original position in the vertical direction due to inertia. Therefore, the hydraulic oil above the damping slide column 2 and the spring 1 4 on the upper side are compressed, causing the hydraulic oil to flow through the oil channel 21 and the oil groove 22 to the chamber below the damping slide column 2 to absorb part of the impact energy. At the same time, since the bell mouth of the oil channel 21 has a larger cross-section at the top and a smaller cross-section at the bottom, the liquid resistance generated at this time is relatively large, causing the hydraulic oil to flow downward at a slower speed, thereby absorbing more impact energy, causing the spring 2 7 to slowly recover.

It is known from common technical knowledge that the present invention can be implemented by other practical schemes that do not deviate from its spirit or essential features. Therefore, the above disclosed embodiments are only illustrative in all respects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

Claims (6)

1. The utility model provides a spring-type oil pressure buffer, its characterized in that, includes cylinder (1), be full of hydraulic oil in the inside cavity of cylinder (1), the middle part sliding connection of cylinder (1) has damping slide column (2), and the opening part threaded connection on its top has jar end cap (3), the upper and lower both ends of damping slide column (2) all are equipped with a spring (4), be equipped with oil duct (21) and oil groove (22) that run through on damping slide column (2), fixedly connected with buffering guide arm (5) on jar end cap (3), buffering guide arm (5) pass buffering guide pin bushing (6) to with its sliding connection, the cover is equipped with spring two (7) on buffering guide arm (5) of buffering guide pin bushing (6) below.

2. A spring type oil pressure buffer according to claim 1, characterized in that the buffer guide sleeve (6) is fixedly connected with a buffer connection end (61), and the bottom of the cylinder barrel (1) is fixedly connected with a connection part (11).

3. A spring-type hydraulic damper according to claim 1, characterized in that a sealing ring (8) is provided between the cylinder end cap (3) and the cylinder tube (1).

4. A spring-loaded hydraulic buffer according to claim 1, characterized in that the buffer guide rod (5) is embedded in the cylinder end cap (3) and is fastened by means of screws (9) for a fixed connection to the cylinder end cap (3).

5. A spring type oil pressure buffer according to claim 1, characterized in that the number of the oil channels (21) is at least one, the diameter of the oil channels (21) is big end down, and the oil grooves (22) are provided in plurality and uniformly distributed on the outer circumferential wall of the damping slide column (2).

6. A spring type oil pressure buffer according to claim 1, characterized in that the cylinder end cap (3) is provided with an oil filling hole, and the oil filling hole is internally threaded with an end cap plug (10).