A mechanism capable of realizing multi-degree-of-freedom compensation of hydraulic system

Abstract

The present invention discloses a mechanism that can realize multi-degree-of-freedom compensation of a hydraulic system. The mechanism comprises a piston rod and a piston sleeve. The interior of the piston rod is hollow. One end of the piston rod is sleeved in the piston sleeve, and the other end of the piston rod is connected to an adjustment assembly. The adjustment assembly comprises a branch pipe connected to the piston rod. The interior of the branch pipe is hollow and communicated with the piston rod. A fan-shaped protrusion is provided on the outer side of the circumferential surface of the branch pipe. The end of the branch pipe is connected to a pipe joint and communicated with a nozzle arranged inside the pipe joint. The pipe joint is provided with a fan-shaped groove at a position corresponding to the fan-shaped protrusion. The arc size of the fan-shaped groove and the fan-shaped protrusion is a clearance fit. The width of the fan-shaped groove is greater than the width of the fan-shaped protrusion. The lower end of the piston sleeve is connected to the nozzle or the adjustment assembly. The advantages of the present invention are: it realizes compensation of multiple degrees of freedom in space, has a large compensation amount, a large range of pressure variation, low maintenance cost, and high reliability.

Description

Technical Field

[0001] The invention relates to the field of mechanical hydraulics, in particular to a multi-freedom connecting pipeline structure of a rigid pipeline. Background Art

[0002] In a hydraulic system (or mechanism) with relatively high pressure, some parts will produce displacement and angular changes, requiring compensation design. The commonly used ball-cone combination is connected with a rigid structure, a hose or a compensation device. The ball-cone combination structure has a small amount of compensation for the displacement and angle of the rigid parts. At the same time, the sealing reliability will deteriorate with a large number of working times and it is easy to break. The hose connection has a small operating pressure range and is prone to aging, poor strength and damage. Conventional compensation devices are difficult to miniaturize at higher pressures and are costly. Summary of the Invention

[0003] In order to solve the above problems, the present invention discloses a mechanism that can realize multi-degree-of-freedom compensation of a hydraulic system.

[0004] The specific technical solutions are as follows:

[0005] A mechanism capable of realizing multi-degree-of-freedom compensation of a hydraulic system comprises a piston rod and a piston sleeve, wherein the interior of the piston rod is hollow, one end of the piston rod is sleeved in the piston sleeve, and the other end of the piston rod is connected to an adjustment assembly; the adjustment assembly comprises a branch pipe connected to the piston rod, the interior of the branch pipe is hollow and communicated with the piston rod, a fan-shaped protrusion is provided on the outer side of the circumferential surface of the branch pipe, the end of the branch pipe is connected to a pipe joint and communicated with a nozzle arranged inside the pipe joint, a fan-shaped groove is provided on the pipe joint at a position corresponding to the fan-shaped protrusion, and the arc dimensions of the fan-shaped groove and the fan-shaped protrusion are clearance-matched; the width of the fan-shaped groove is greater than the width of the fan-shaped protrusion, and the lower end of the piston sleeve is connected to the pipe nozzle or the adjustment assembly.

[0006] The lower end of the piston sleeve is connected to one end of the branch pipe of the adjustment assembly. The hollow interior of the branch pipe is connected to the piston rod in the piston sleeve. A fan-shaped protrusion is provided on the outer side of the circumferential surface of the branch pipe. The end of the branch pipe is connected to the pipe joint and is connected to the pipe nozzle provided inside the pipe joint. The pipe joint is provided with a fan-shaped groove at a position corresponding to the fan-shaped protrusion. The arc dimensions of the fan-shaped groove and the fan-shaped protrusion are clearance-matched, and the width of the fan-shaped groove is greater than the width of the fan-shaped protrusion.

[0007] An annular groove is provided on the inner wall of the piston sleeve, and a sealing ring and a retaining ring are provided between the piston sleeve and the piston rod.

[0008] An annular groove is provided on the inner wall of the pipe joint, and a sealing ring and a retaining ring are provided between the pipe joint and the joint.

[0009] The fan-shaped grooves and fan-shaped protrusions are arranged in a conformal manner.

[0010] A mounting hole is provided on the pipe joint.

[0011] The included angle between the pipe nozzle and the piston rod is 90°.

[0012] The advantages of the present invention are: the present invention adopts a mechanical structure with multi-degree-of-freedom compensation to achieve compensation of multiple degrees of freedom in space, and the compensation amount is large, the operating pressure variation range is large, the maintenance cost is low, and the reliability is high. By adjusting the size of parts, the use of equipment with different flow rates and pressures can be achieved. In addition, the mechanism has a simple structure, easy parts processing, and convenient assembly, testing and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the planar structure of the present invention;

[0014] Figure 2 for Figure 1 AA direction view;

[0015] Figure 3 It is a schematic diagram of the three-dimensional structure of the present invention;

[0016] Figure 4 This is a three-dimensional front view of the present invention;

[0017] Figure 5 Schematic diagram of the structure of the pipe joint and the nozzle;

[0018] Figure 6 Schematic diagram of the structure of the piston rod and branch pipe. DETAILED DESCRIPTION

[0019] The present invention is described in detail below with reference to the accompanying drawings. As shown in the figure, a mechanism that can realize multi-degree-of-freedom compensation of a hydraulic system is provided, comprising a piston rod 4 and a piston sleeve 1. The piston rod 4 is hollow inside, one end of the piston rod is sleeved in the piston sleeve 1, and the other end of the piston rod 4 is connected to an adjustment assembly 7; the adjustment assembly 7 includes a branch pipe 8 connected to the piston rod 4, the branch pipe 8 is hollow inside and communicates with the piston rod 4, a fan-shaped protrusion 9 is provided on the outer side of the circumferential surface of the branch pipe 8, the end of the branch pipe 8 is connected to the pipe nozzle 2, and is communicated with a nozzle 10 provided inside the pipe nozzle, the pipe nozzle 2 is provided with a fan-shaped groove 21 at a position corresponding to the fan-shaped protrusion 9, and the arc size of the fan-shaped groove 21 and the fan-shaped protrusion 9 is a clearance fit; the width of the fan-shaped groove is greater than the width of the fan-shaped protrusion, and the lower end of the piston sleeve 1 is connected to the nozzle 10 or the adjustment assembly 7.

[0020] The lower end of the piston sleeve 1 is connected to one end of the branch pipe 8 of the adjustment assembly 7. The interior of the branch pipe 8 is hollow and communicated with the piston rod in the piston sleeve. A fan-shaped protrusion is provided on the outer side of the circumferential surface of the branch pipe. The end of the branch pipe is connected to the pipe joint and communicated with the pipe nozzle provided inside the pipe joint. The pipe joint is provided with a fan-shaped groove at a position corresponding to the fan-shaped protrusion. The arc dimensions of the fan-shaped groove and the fan-shaped protrusion are clearance fit, and the width of the fan-shaped groove is greater than the width of the fan-shaped protrusion.

[0021] An annular groove 11 is provided on the inner wall of the piston sleeve, and a sealing ring 5 and a retaining ring 6 are provided between the piston sleeve and the piston rod.

[0022] An annular groove 11 is provided on the inner wall of the pipe joint, and a sealing ring 5 and a retaining ring 6 are provided between the pipe joint and the joint.

[0023] The sector-shaped grooves 21 and the sector-shaped protrusions 9 are arranged in a conformal manner.

[0024] A mounting hole 12 is provided on the pipe nozzle.

[0025] The included angle between the pipe nozzle and the piston rod is 90°.

[0026] The design idea of ​​the present invention is: the design of each structural component of the present invention should be carried out in accordance with the drawings in the specification. The support rod and the piston sleeve are designed to be a 90-degree bend structure. Due to the structure of the fan-shaped protrusion and the fan-shaped groove, the pipe nozzle can be rotated on the piston rod or the piston sleeve to achieve compensation for the angle of the rigid parts to be connected; the piston rod and the piston sleeve are coaxially installed, and the piston rod can move up and down in the piston sleeve to achieve compensation for the displacement of the rigid parts to be connected; due to the different thicknesses of the fan-shaped groove and the fan-shaped protrusion, lateral compensation can be achieved by adjusting the gap between the fan-shaped groove and the fan-shaped boss. The fan-shaped boss and fan-shaped groove structure also has a locking and fixing function, which not only reduces the number of parts of the connecting mechanism and improves reliability, but also reduces manufacturing costs. An O-ring plus a retaining ring structure is used between the pipe nozzle, the piston rod, and the piston sleeve to achieve sealing of the liquid. The sealing rings are designed on the inner walls of the pipe nozzle and the piston sleeve to make the connecting mechanism more compact.

[0027] When the liquid pressure is high, multiple O-rings and retaining rings should be added to ensure the sealing effect. The outer contours of the pipe nozzle, piston rod and piston sleeve of the mechanical structure of the hydraulic system's multi-degree-of-freedom compensation can be adjusted as needed without interference during compensation.

[0028] The compensation amount in the up and down directions can be adjusted by changing the length of the piston rod and the piston sleeve according to the compensation amount requirement, the compensation amount in the rotation direction can be adjusted by changing the angle of the fan-shaped groove and the fan-shaped protrusion, and the compensation amount in the lateral displacement direction can be adjusted by changing the gap between the fan-shaped groove and the fan-shaped boss.

[0029] The assembly axes and assembly planes of the parts in the drawings of the specification are parallel or perpendicular to each other, and the angles of the fan-shaped grooves and the fan-shaped protrusions should still have overlap at the maximum angle compensation.

Claims

1. A mechanism capable of realizing multi-degree-of-freedom compensation of a hydraulic system, characterized by: A piston rod and a piston sleeve are provided, the interior of the piston rod is hollow, one end of the piston rod is sleeved in the piston sleeve, and the other end of the piston rod is connected to an adjustment assembly; the adjustment assembly includes a branch pipe connected to the piston rod, the angle between the branch pipe and the piston rod is 90°, the interior of the branch pipe is hollow and communicated with the piston rod, a fan-shaped protrusion is provided on the outer side of the circumferential surface of the branch pipe, the end of the branch pipe is connected to the pipe joint and communicated with a nozzle provided inside the pipe joint, the pipe joint is provided with a fan-shaped groove at a position corresponding to the fan-shaped protrusion, and the arc dimensions of the fan-shaped groove and the fan-shaped protrusion are clearance-matched; the width of the fan-shaped groove is greater than the width of the fan-shaped protrusion, and the lower end of the piston sleeve is connected to the pipe nozzle or the adjustment assembly.

2. The mechanism capable of realizing multi-degree-of-freedom compensation of a hydraulic system according to claim 1, characterized in that: The connection method between the piston sleeve and the adjustment assembly is as follows: the lower end of the piston sleeve is connected to one end of the branch pipe of the adjustment assembly, the hollow interior of the branch pipe is connected to the piston rod in the piston sleeve, a fan-shaped protrusion is provided on the outer side of the circumferential surface of the branch pipe, the end of the branch pipe is connected to the pipe joint and is connected to the pipe nozzle provided inside the pipe joint, and the pipe joint is provided with a fan-shaped groove at the position corresponding to the fan-shaped protrusion, the arc size of the fan-shaped groove and the fan-shaped protrusion is a clearance fit, and the width of the fan-shaped groove is greater than the width of the fan-shaped protrusion.

3. The mechanism capable of realizing multi-degree-of-freedom compensation of a hydraulic system according to claim 1, characterized in that: An annular groove is provided on the inner wall of the piston sleeve, and a sealing ring and a retaining ring are provided between the piston sleeve and the piston rod.

4. The mechanism for realizing multi-degree-of-freedom compensation of a hydraulic system according to claim 1, characterized in that: An annular groove is provided on the inner wall of the pipe joint, and a sealing ring and a retaining ring are provided between the pipe joint and the branch pipe.

5. The mechanism capable of realizing multi-degree-of-freedom compensation of a hydraulic system according to claim 1, characterized in that: The fan-shaped groove and the fan-shaped protrusion are adapted in shape.

6. The mechanism capable of realizing multi-degree-of-freedom compensation of a hydraulic system according to claim 1, characterized in that: A mounting hole is provided on the pipe joint.

7. The mechanism for realizing multi-degree-of-freedom compensation of a hydraulic system according to claim 1, characterized in that: The included angle between the pipe nozzle and the piston rod is 90°.

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