CN215908178U

CN215908178U - Novel piston guiding mechanism

Info

Publication number: CN215908178U
Application number: CN202120141148.2U
Authority: CN
Inventors: 李美钗; 李小亮; 王度
Original assignee: Shanghai Pohu Drive System Co ltd
Current assignee: Shanghai Pohu Drive System Co ltd
Priority date: 2021-01-19
Filing date: 2021-01-19
Publication date: 2022-02-25
Anticipated expiration: 2031-01-19

Abstract

The utility model discloses a novel piston guide mechanism, which comprises a rotor, wherein a plurality of pistons are arranged in a circumferential hole of the rotor, sealing elements are sleeved on the surfaces of the pistons, bearing bushes are arranged in inner cavities of the pistons, and cylindrical rollers are arranged on the outer sides of the bearing bushes Double-row and multi-row piston structures.

Description

Novel piston guiding mechanism

Technical Field

The utility model relates to a piston, in particular to a novel piston guide mechanism.

Background

The inner curve radial piston hydraulic motor is a low-speed large-torque hydraulic motor, and is widely applied to working conditions of coal machine markets, raise boring machines, crushers and the like.

In the inner curve radial piston hydraulic motor, the most critical part is a rotor assembly, the rotor assembly continuously rotates under the pushing of oil liquid, and the rotor assembly is output to corresponding equipment through a spline shaft, so that the conversion between hydraulic energy and kinetic energy is realized. The embodiment of the utility model provides a novel piston guide mechanism which comprises a rotor, a piston, a bearing bush, a cylindrical roller, a plastic stop block and a sealing element. The radial direction of the rotor is provided with a plurality of holes for the piston to move, and the piston does reciprocating linear motion and rotary motion in the rotor hole under the action of hydraulic pushing and counter-thrust of the stator. The plastic stop block is designed to be clamped in a groove matched with the rotor through a flange, so that the rotary motion of the piston is well limited in the motion, and the function of guiding the piston is achieved. The limit of the plastic stop block flange is provided, so that the piston can only do linear reciprocating motion and can not do rotary motion in the cavity of the rotor in the motion process of the piston in the rotor assembly.

Disclosure of Invention

The utility model aims to provide a novel piston guide mechanism which comprises a rotor, wherein a plurality of pistons are arranged in circumferential holes of the rotor, sealing elements are sleeved on the surfaces of the pistons, bearing bushes are arranged in inner cavities of the pistons, cylindrical rollers are arranged on the outer sides of the bearing bushes, and plastic check blocks are arranged at two ends of each cylindrical roller.

In a preferred embodiment of the present invention, the outer side surface of the plastic stopper has a flange, the flange and the plastic stopper are integrated, and the cross-sectional shape of the flange is rectangular, circular arc, trapezoid, or triangular.

As a preferable technical scheme of the utility model, the inner hole of the rotor is provided with a groove, and the groove of the groove is matched with the flange of the plastic stop block.

As a preferred technical scheme of the utility model, the structure is suitable for single-row, double-row and multi-row piston structures.

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

the plastic stop block is provided with a flange for guiding without additional parts, thereby saving the processing cost and reducing risk points, the friction of the cylindrical roller is eliminated by the arranged bearing bush, the service lives of the cylindrical roller and the piston are greatly prolonged, the rotor hole is processed with a groove with a corresponding shape, the flange of the plastic stop block is adapted, the flange of the plastic stop block is clamped in the groove correspondingly designed by the rotor, and the rotary motion of the piston in the rotor is limited, so that the piston only moves linearly and repeatedly in the rotor hole without rotary motion, the sealing element has a sealing effect, the leakage of an internal motor is reduced, the friction between the piston and the rotor can be reduced, the service life of the piston is prolonged, and the plastic stop block is suitable for single-row, double-row, three-row and multi-row piston structures.

Drawings

FIG. 1 is an overall cross-sectional structural view of the present invention;

FIG. 2 is a top view of a rotor with grooves of the present invention;

FIG. 3 is a top view of the plastic stop of the present invention with a radiused flange;

FIG. 4 is a front view of the plastic stop of the present invention;

fig. 5 is a top view of a rectangular flanged plastic stop of the present invention.

In the figure: 1. a rotor; 2. a piston; 3. bearing bushes; 4. a cylindrical roller; 5. a plastic stopper; 6. a seal member; 7. a trench; 8. a flange.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a novel piston guiding mechanism, which includes a rotor 1, a plurality of pistons 2 are disposed in circumferential holes of the rotor 1, sealing members 6 are respectively sleeved on surfaces of the pistons 2, bearing bushes 3 are disposed in inner cavities of the pistons 2, cylindrical rollers 4 are disposed on outer sides of the bearing bushes 3, and plastic stoppers 5 are disposed at two ends of the cylindrical rollers 4.

Preferably, the outer side surface of the plastic block 5 is provided with a flange 8, the flange 8 and the plastic block 5 are integrated, and the cross section of the flange 8 is rectangular, circular arc, trapezoid or triangular. The flange 8 limits the rotational movement of the piston 2 within the rotor 1, thereby ensuring that the piston 2 only reciprocates linearly within the bore of the rotor 1.

Preferably, the inner bore of the rotor 1 is provided with a groove 7, the groove of the groove 7 matching with the flange 8 of the plastic stop 5, so that the flange 8 can be clamped in the groove 7 of the rotor 1.

Preferably, the structure is suitable for single-row, double-row and multi-row piston structures.

When the hydraulic oil pump is used specifically, when hydraulic oil enters the rotor 1, the piston 2 communicated with the distributing hole of the rotor 1 is pushed to move linearly outwards, and when the cylindrical roller 4 in the inner cavity of the piston 2 is at the limit of the stroke, the cylindrical roller 4 pushes the piston 2 to move linearly back in the cavity of the rotor 1 on one hand and rotate in the cavity of the rotor 1 on the other hand under the reaction thrust of an external part. Meanwhile, the cylindrical roller 4 also has two motions, on one hand, the cylindrical roller and the bearing bush 3 slide relatively, on the other hand, the cylindrical roller does a rotary motion in the cavity of the piston 2, the bearing bush 3 is arranged to eliminate the friction of the cylindrical roller 4, and the service life of the cylindrical roller 4 and the service life of the piston 2 are greatly prolonged. The rotary motion of piston 2 in rotor 1 is harmful, also can cause cylindrical roller 4 to drop, and the plastics dog 5 of installation cylindrical roller 4 both sides has not only restricted falling of cylindrical roller 4, and the installation of its outside has flange 8 card in the slot 7 of rotor 1, has still restricted the rotary motion of piston 2 in rotor 1 to guarantee that piston 2 only has the straight line repetitive motion in rotor 1 downthehole. Such a group of movements drives the rotor 1 to continuously perform circular rotation, so that the rotor 1 can be used as output power to convert hydraulic energy into mechanical energy. The sealing element 6 is arranged on the outer side of the piston 2, so that the sealing effect is achieved, the internal leakage of the motor is reduced, the friction between the piston 2 and the rotor 1 can be reduced, and the service life of the piston 2 is prolonged in the linear extending or retracting work of the piston 2.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the utility model can be made, and equivalents and modifications of some features of the utility model can be made without departing from the spirit and scope of the utility model.

Claims

1. A novel piston guiding mechanism comprises a rotor (1), and is characterized in that: the rotor is characterized in that a plurality of pistons (2) are arranged in circumferential holes of the rotor (1), sealing elements (6) are sleeved on the surfaces of the pistons (2), bearing bushes (3) are arranged in inner cavities of the pistons (2), cylindrical rollers (4) are arranged on the outer sides of the bearing bushes (3), and plastic check blocks (5) are arranged at two ends of each cylindrical roller (4).

2. The novel piston guide mechanism of claim 1, wherein: the outer side surface of the plastic stop block (5) is provided with a flange (8), the flange (8) and the plastic stop block (5) are integrated, and the cross section of the flange (8) is rectangular, circular arc, trapezoid or triangular.

3. The novel piston guide mechanism of claim 1, wherein: the inner hole of the rotor (1) is provided with a groove (7), and the groove of the groove (7) is matched with the flange (8) of the plastic stop block (5).

4. The novel piston guide mechanism of claim 1, wherein: the structure is suitable for single-row, double-row and multi-row piston structures.