CN218953478U

CN218953478U - Axle joins in marriage class cycloid hydraulic motor

Info

Publication number: CN218953478U
Application number: CN202223077062.1U
Authority: CN
Inventors: 王志生; 李璐; 吴方明
Original assignee: ZHENJIANG DALI HYDRAULIC MOTOR CO Ltd
Current assignee: ZHENJIANG DALI HYDRAULIC MOTOR CO Ltd
Priority date: 2022-11-21
Filing date: 2022-11-21
Publication date: 2023-05-02
Anticipated expiration: 2032-11-21

Abstract

The utility model relates to a cycloid hydraulic motor with axial flow distribution, and belongs to the technical field of hydraulic transmission. The motor is arranged in the body shell and is internally provided with two step-shaped one-way valves, so that the phenomenon that one end of an inclined hole communicated with the cavity of the motor is not communicated with a sealing step surface hole of the one-way valve to form a intersecting hole is eliminated. The utility model has the advantages of simple and compact integral structure, high pressure level, stable and reliable movement, good manufacturing manufacturability, good assembly and maintenance manufacturability and meeting the use requirement.

Description

Axle joins in marriage class cycloid hydraulic motor

Technical Field

The utility model relates to a cycloid hydraulic motor, in particular to a shaft flow distribution cycloid hydraulic motor, and belongs to the technical field of hydraulic transmission.

Background

The cycloid hydraulic motor is a relatively common hydraulic driving device, is a low-speed high-torque motor, has the advantages of small volume, high unit power density, high efficiency, wide rotating speed range and the like, is widely applied, and is more widely applied along with the further improvement of the industrial and agricultural development level in China.

The basic structure of the device is that a liquid inlet and a reflux port are arranged on a body shell or a rear cover, one end of the device is provided with a cycloidal pin gear meshing pair and a flow distribution mechanism, the flow distribution mechanism can be arranged in front of or behind the cycloidal pin gear meshing pair, generally, a shaft valve is used for distributing flow in front (one side of the body shell), a circular surface of a flow distribution system is axially arranged, a plane is used for distributing flow in rear (one side of the rear cover), the plane of the flow distribution system is radially arranged, and the other end of the device is provided with an output shaft. The rotor of the cycloidal pin gear meshing pair is meshed with the external teeth at one end of the linkage shaft through an internal spline, and the other end of the linkage shaft is in transmission connection with the output shaft. When the cycloidal needle wheel pair works, the fluid distribution mechanism enables the fluid inlet to be communicated with the expansion meshing cavity of the cycloidal needle wheel pair, and enables the contraction cavity of the cycloidal needle wheel pair to be communicated with the backflow port. As a result, the pressure liquid enters the body shell or the rear cover from the liquid inlet, and then enters the expansion meshing cavity formed by the cycloidal pin gear meshing pair, so that the volume of the expansion meshing cavity is continuously expanded, and meanwhile, the liquid in the contraction meshing cavity formed by the cycloidal pin gear meshing pair flows back from the backflow port; in the process, the rotor of the cycloidal pin gear meshing pair is driven to rotate by the pressure difference between the expansion meshing cavity and the contraction meshing cavity, and the rotation is transmitted to the output shaft through the linkage shaft to be output, so that the conversion from hydraulic energy to mechanical energy is realized. Meanwhile, the flow distribution mechanism is synchronously driven to rotate by the linkage shaft, and the communication state is continuously switched from cycle to cycle, so that the conversion process can be continued. Thus, the motor can continuously output torque, so that the cycloidal pin gear meshing pair and the flow distribution mechanism are the core of the cycloidal hydraulic motor.

According to the knowledge of the applicant, the existing axial flow cycloid hydraulic motor is arranged on the check valve at the mounting spigot end, and due to the inclined hole processing technology, sharp angles and sharp edges are formed in intersecting holes intersecting with straight holes of the check valve, so that the front end sealing ring is not beneficial to mounting, the front end sealing ring is easy to damage early, the efficiency of the motor is possibly reduced, no good way is provided on the motor with the structure at present, and then a high-pressure rotary shaft seal is adopted, so that the cost of the motor is increased due to the fact that two check valves are cancelled, the application working condition of the rotary shaft seal is aggravated severely, and the probability of replacing the rotary shaft seal is increased.

Disclosure of Invention

The utility model aims at: aiming at the problems in the prior art, the motor with similar structure size and no through hole structure affecting the installation of the sealing ring is provided, the reliability of the sealing of the cavity of the motor is improved, and the motor has the advantages of simple and reliable structure, good manufacturing manufacturability and good assembly manufacturability.

In order to achieve the above purpose, the applicant proposes a cycloid hydraulic motor structure which has compact structure and improves the sealing reliability of a one-way valve through structural analysis of the existing motor, and the technical scheme of the utility model is as follows: a cycloid hydraulic motor with axial flow distribution comprises a front cover, a body shell, a rotor-stator meshing pair, a motor driving mechanism and a motor driving mechanism, wherein the front cover and the body shell are fixedly connected with each other; an output shaft with an outer end extending out of the shaft extension is arranged in the body shell, and the output shaft is in transmission connection with the rotor-stator meshing pair through a linkage shaft; the improvement is that: the front end of the body shell is provided with two one-way valves which are respectively communicated with the oil inlet and the oil outlet and communicated with the internal cavity of the motor through a pore canal, the valve hole of the one-way valve of the body shell is in a step hole shape, and the valve body of the one-way valve is in a step shaft shape.

The valve hole of the check valve of the body shell is formed by a step hole-shaped outer opening sealing section with a size larger than that of a step hole-shaped inner opening sealing section, and the valve body of the check valve is formed by a step shaft-shaped outer end sealing section with a size larger than that of a step inner end sealing section.

The check valve comprises a valve body, a large sealing ring, a small sealing ring and a steel ball, wherein the large end of the stepped valve hole of the body shell is matched with the large end of the stepped shaft-shaped valve body and is sealed by the large sealing ring, and the small end of the stepped valve hole of the body shell is matched with the small end of the stepped shaft-shaped valve body and is sealed by the small sealing ring. The one-way valve is installed into the valve hole of the body shell at one time.

The steel ball is arranged in the inner cavity of the valve body, one end of the steel ball abuts against the oil passage hole of the inner cavity of the valve body to seal high-pressure oil liquid, and the other end of the steel ball is limited through thin-wall deformation riveting of the inner cavity of the valve body. The oil passage hole in the inner cavity of the valve body is communicated with the inner cavity of the motor through the inclined hole.

And one end of the inclined hole is communicated with the sealing step surface hole of the different one-way valves to form a intersecting hole channel.

After the technical scheme is adopted, the utility model has the beneficial effects that: the intersecting pore canal of the inclined small hole of the valve hole of the check valve of the body shell has no influence on the installation of the sealing ring of the check valve.

The cycloid hydraulic motor with the axial flow distribution has the advantages of high pressure level, simple and compact overall structure, stable and reliable movement, good manufacturing manufacturability, good assembly and maintenance manufacturability and capability of meeting the use requirement through researching the overall layout structure of the cycloid hydraulic motor.

Drawings

In order that the utility model may be more readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Fig. 1 is a schematic structural diagram of a first embodiment of the present utility model.

In the figure: the device comprises an output shaft 1, a key 2, a dust ring 3, a shaft seal 4, a front cover 5, a valve body 6, a large sealing ring 7, a small sealing ring 8, a valve ball 9, a body shell 10, an oil port cover 11, an O-shaped ring 12, a separation disc 13, a rotating stator meshing pair 14, a rear cover 15, a screw plug 16, a gasket 17, a steel gasket 18, a connecting bolt 19, a linkage shaft 20, a front check ring 21, an O-shaped ring 22, a plane thrust bearing 23, a check ring 24, a screw 25, an oil-through oil groove A and an oil-through oil groove B.

Fig. 2 is an enlarged schematic view of a check valve according to a first embodiment of the present utility model.

In the figure: valve body 6, big sealing washer 7, little sealing washer 8, valve ball 9. (the same parts are designated by the same reference numerals as in FIG. 1).

Detailed Description

The following describes in detail the examples of the present utility model, which are given by way of example only and the detailed embodiments and specific procedures thereof are given on the premise of the technical solution of the present utility model, but the scope of the present utility model is not limited to the following examples.

The above object is achieved by the following embodiments:

example 1

Referring to fig. 1, the basic structure of the axial-flow cycloid hydraulic motor of the present embodiment includes a front cover 5 and a body housing 10 which are fixedly connected to each other, and a rotor-stator engagement pair 14, one end of which is fixedly connected to the body housing 10 through a spacer disk 13 and the other end of which is fixedly connected to a rear cover 15; an output shaft 1 with an outer end extending out of the shaft extension is arranged in the body shell 10, and the output shaft 1 is in transmission connection with the rotor-stator meshing pair 14 through a linkage shaft 20; the front end of the body shell 10 is provided with two one-way valves which are respectively communicated with oil inlet and outlet, the oil inlet and outlet are respectively communicated with an oil through groove A and an oil through groove B which are arranged on the output shaft 1, the oil inlet and outlet are respectively packaged and sealed by an oil port cover 11, the one-way valves are respectively communicated with the internal cavity of the motor through pore canals, the valve hole of the one-way valve of the body shell 10 is arranged into a step hole shape, and the valve body 6 of the one-way valve is in a step shaft shape.

The size of the sealing section of the one-way valve hole of the body shell 10 is larger than that of the sealing section of the step hole-shaped outer opening, and the size of the sealing section of the one-way valve body 6 is larger than that of the sealing section of the step shaft-shaped outer end.

The step hole-shaped sealing section and the step shaft-shaped sealing section are two sections.

As shown in fig. 2, the one-way valve is composed of a valve body 6, a large sealing ring 7, a small sealing ring 8 and a steel ball 9, the large end of a stepped hole-shaped valve hole of a body shell 10 is matched with the large end of the stepped shaft-shaped valve body 6, the large sealing ring 7 seals the large end of the stepped hole-shaped valve hole of the body shell 10, the small end of the stepped shaft-shaped valve hole of the body shell 10 is matched with the small end of the stepped shaft-shaped valve body 6, the small sealing ring 8 seals the small end of the stepped hole-shaped valve hole, the steel ball 9 is arranged in the inner cavity of the valve body 6, one end of the steel ball is abutted against an oil duct hole in the inner cavity of the valve body 6 to seal high-pressure oil, and the other end of the steel ball is limited by deformation and riveting of the thin wall of the inner cavity of the valve body 6. And the oil passage hole in the inner cavity of the valve body 6 is communicated with the inclined hole in the inner cavity of the motor.

The large sealing ring 7 and the small sealing ring 8 are O-shaped rings.

The steel ball 9 is arranged in an inner hole of an oil liquid channel of the valve body 6, one section of the inner hole is provided with an annular inclined plane in spherical contact with the steel ball 9 for unidirectional sealing, and one end of the circular surface of the inner hole limits the steel ball 9 in the inner hole of the channel through elastic deformation or adopts a stepped hole for unidirectional sealing.

The check valve is arranged in the valve hole of the body shell 10 at one time, and the large sealing ring 7 and the small sealing ring 8 seal the step hole-shaped sealing section and the step shaft-shaped sealing section.

The front cover 5 is provided with a mounting spigot of the motor, and the one-way valve is arranged at the mounting spigot end of the motor.

The check valve hole of the body shell 10 is arranged in a stepped hole shape, and the check valve body 6 is in a stepped shaft shape. One end of the inclined hole at the valve hole of the check valve of the body shell 10 cannot communicate with the sealing step surface hole of the check valve to form a intersecting hole.

The check valve can be equivalently replaced by adopting two combined parts, for example, the check valve is divided into two sections, the sections are divided into a large end and a small end of the step, the large end of the step hole-shaped valve hole is sealed by adopting a ball expansion plug or a steel plug, and the small end of the step hole-shaped valve hole is sealed and provided with the check valve.

The technical features of the above embodiments may be arbitrarily combined, and for brevity of description, all possible combinations of the technical features of the above embodiments are not described, however, as long as there is no contradiction between the combinations of the technical features, it should be considered that the scope described in the present specification, such as the step-shaped check valve is provided at a different position of the motor, etc.

The above examples illustrate only one embodiment of the utility model, which is described in more detail and is not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. A cycloid hydraulic motor with axial flow distribution comprises a front cover, a body shell, a rotor-stator meshing pair, a motor driving mechanism and a motor driving mechanism, wherein the front cover and the body shell are fixedly connected with each other; an output shaft with an outer end extending out of the shaft extension is arranged in the body shell, and the output shaft is in transmission connection with the rotor-stator meshing pair through a linkage shaft; the method is characterized in that: the front end of the body shell is provided with two one-way valves which are respectively communicated with the oil inlet and the oil outlet and communicated with the internal cavity of the motor through a pore canal, the valve hole of the one-way valve of the body shell is in a step hole shape, and the valve body of the one-way valve is in a step shaft shape.

2. The axial flow gerotor hydraulic motor of claim 1, wherein: the valve hole of the check valve of the body shell is formed by a step hole-shaped outer opening sealing section with a size larger than that of a step hole-shaped inner opening sealing section, and the valve body of the check valve is formed by a step shaft-shaped outer end sealing section with a size larger than that of a step inner end sealing section.

3. A shaft-split gerotor hydraulic motor according to claim 1 or 2, characterized in that: the check valve comprises a valve body, a large sealing ring, a small sealing ring and a steel ball, wherein the large end of the stepped valve hole of the body shell is matched with the large end of the stepped shaft-shaped valve body and is sealed by the large sealing ring, and the small end of the stepped valve hole of the body shell is matched with the small end of the stepped shaft-shaped valve body and is sealed by the small sealing ring.

4. A shaft-split gerotor hydraulic motor of claim 3, characterized in that: the one-way valve is installed in the valve hole of the body shell at one time.

5. A shaft-split gerotor hydraulic motor of claim 3, characterized in that: the steel ball is arranged in the valve body inner cavity, one end of the steel ball abuts against the oil passage hole of the valve body inner cavity to seal high-pressure oil liquid, the other end of the steel ball is limited through thin-wall deformation riveting of the valve body inner cavity, and the oil passage hole of the valve body inner cavity is communicated with the motor inner cavity through the inclined hole.

6. The axial flow gerotor hydraulic motor of claim 5, wherein: one end of the inclined hole cannot communicate with the sealing step surface hole of the one-way valve to form a intersecting hole.

7. A shaft-split gerotor hydraulic motor of claim 3, characterized in that: the check valve is replaced by two combined parts equivalently, the check valve is divided into two sections, the sections are carried out according to the large end and the small end of the step, the large end of the step hole-shaped valve hole is sealed by adopting a ball expansion type plug or a steel plug, and the small end of the step hole-shaped valve hole is sealed and provided with the check valve.

8. A shaft-split gerotor hydraulic motor of claim 3, characterized in that: the large sealing ring and the small sealing ring are O-shaped rings.