CN115680985A

CN115680985A - Axial flow distribution cycloid hydraulic motor

Info

Publication number: CN115680985A
Application number: CN202211453049.3A
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: 2023-02-03

Abstract

The invention relates to an axial flow distribution cycloid hydraulic motor, 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 a through hole channel formed by one end of an inclined hole communicated with the motor cavity and communicated with a sealing step hole of the one-way valve is eliminated. The invention has simple and compact integral structure, high pressure grade, stable and reliable motion, good manufacturing process and assembly and maintenance process and meets the use requirement.

Description

Axial flow distribution cycloid hydraulic motor

Technical Field

The invention relates to a cycloid hydraulic motor, in particular to an axial flow distribution cycloid hydraulic motor, and belongs to the technical field of hydraulic transmission.

Background

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

The basic structure of the device is that a liquid inlet and a backflow port are arranged on a body shell or a rear cover, one end of the device is provided with a cycloid pinwheel meshing pair and a flow distribution mechanism, the flow distribution mechanism can be arranged in front of or behind the cycloid pinwheel meshing pair and generally distributes flow for a shaft valve in front (on one side of the body shell), a circular surface of a flow distribution system is axially arranged, plane flow distribution is arranged on the rear (on one side of the rear cover), a plane of the flow distribution system is radially arranged, and the other end of the flow distribution system is provided with an output shaft. And a rotor of the cycloidal pin gear meshing pair is meshed with an external tooth at one end of the universal driving shaft through an internal spline, and the other end of the universal driving shaft is in transmission connection with the output shaft. When the cycloidal pin gear pair works, the flow distribution mechanism enables the liquid inlet to be communicated with the expansion meshing cavity of the cycloidal pin gear pair and enables the contraction cavity of the cycloidal pin gear pair to be communicated with the reflux port. As a result, pressure liquid enters the body shell or the rear cover from the liquid inlet and then enters the expansion meshing cavity formed by the cycloid pin gear meshing pair, so that the volume of the expansion meshing cavity is continuously enlarged, and meanwhile, liquid in the contraction meshing cavity formed by the cycloid pin gear meshing pair flows back from the return 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 repeatedly and continuously switched, so that the conversion process is continued. Thus, the motor can continuously output torque, and the cycloid pin gear meshing pair and the flow distribution mechanism are the core of the cycloid hydraulic motor.

According to the applicant, the existing axial flow distribution cycloid hydraulic motor is arranged on a one-way valve at an installation spigot end, due to the reason of an inclined hole machining process, a sharp corner and a sharp edge can be formed in a through hole intersected with a straight hole of the one-way valve, the installation of a front-end sealing ring is not facilitated, the front-end sealing ring is easy to damage early, the efficiency of the motor is possibly reduced, at present, no method is provided on the motor with the structure, a high-pressure rotary shaft seal is adopted, two one-way valves are omitted, the cost of the motor is increased, the application working condition of the rotary shaft seal is aggravated, and the probability of replacing the rotary shaft seal is increased.

Disclosure of Invention

The invention aims to: aiming at the problems in the prior art, the motor with the similar structure size and the intersecting hole structure which does not influence the installation of the sealing ring is provided, the sealing reliability of the motor cavity is improved, and the motor is simple and reliable in structure, good in manufacturing manufacturability and good in assembly manufacturability.

In order to achieve the above purpose, the applicant proposes a cycloid hydraulic motor structure which is compact in structure and improves the sealing reliability of a one-way valve through structural analysis of the existing motor, and the technical scheme of the invention is as follows: a kind of axial flow distribution cycloid hydraulic motor, including front cover and body shell that link firmly each other, and one end links firmly with body shell through the spacer disc, another end and the back cover links firmly the rotating stator engagement pair; an output shaft with an outer end extending out of the shaft extension is arranged in the body shell and 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 check valves, the check valves are respectively communicated with the oil inlet and the oil outlet and communicated with the inner cavity of the motor through a pore passage, a valve hole of the body shell check valve is in a step hole shape, and a valve body of the check valve is in a step shaft shape.

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

The check valve is composed of a valve body, a large sealing ring, a small sealing ring and a steel ball, the large end of the step-shaped valve hole of the body shell is matched with the large end of the step-shaped shaft valve body and is sealed by the large sealing ring, and the small end of the step-shaped valve hole of the body shell is matched with the small end of the step-shaped shaft valve body and is sealed by the small sealing ring. The check valve is arranged in the valve hole of the inlet shell at one time.

The steel ball sets up at the valve body inner chamber, and one end is supported and is leaned on valve body inner chamber oil duct hole and carry out high-pressure fluid seal, and the other end is through valve body inner chamber thin wall deformation riveting spacing. And the oil passage hole of the inner cavity of the valve body is communicated with the inner cavity of the motor through an inclined hole.

And one end of the inclined hole is communicated with the sealing step surface of the check valve to form a through hole passage.

After the technical scheme is adopted, the invention has the beneficial effects that: the intersecting pore passage of the inclined small hole of the valve hole of the body shell one-way valve has no influence on the installation of the sealing ring of the one-way valve, and the adverse sealing effect of the pore passage of the valve hole of the motor one-way valve in the fixed thinking on the sealing ring is avoided.

According to the axial flow distribution cycloid hydraulic motor, through the research on the overall layout structure of the cycloid hydraulic motor, the motor has the advantages of high pressure level, simple and compact overall structure of the motor, stable and reliable motion, good manufacturing process and assembly and maintenance process, and can meet the use requirements.

Drawings

In order that the present disclosure may be more readily and clearly understood, reference will now be made in detail to the present disclosure, examples of which are illustrated in the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

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

In the figure: the oil-gas separator comprises an output shaft 1, a key 2, a dustproof 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 partition disc 13, a rotor-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 retaining ring 21, an O-shaped ring 22, a plane thrust bearing 23, a retaining 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 invention.

In the figure: the valve comprises a valve body 6, a large sealing ring 7, a small sealing ring 8 and a valve ball 9. (the same parts are the same as the parts in FIG. 1).

Detailed Description

The following is a detailed description of the embodiments of the present invention, which is implemented on the premise of the technical solution of the present invention, and the detailed implementation and the specific operation procedures are given, but the scope of the present invention is not limited to the following embodiments.

The above object is achieved by the following embodiments:

example one

Referring to fig. 1, the basic structure of the axial flow distribution cycloid hydraulic motor of the present embodiment includes a front cover 5 and a body shell 10, which are fixedly connected to each other, and a rotor-stator meshing pair 14, one end of which is fixedly connected to the body shell 10 through a partition plate 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 a shaft extension is arranged in the body shell 10, and the output shaft 1 is in transmission connection with a rotor-stator meshing pair 14 through a universal driving shaft 20; the front end of the body shell 10 is provided with two check valves, the two check valves are respectively communicated with an oil inlet and an oil outlet, the oil inlet and the oil outlet are respectively communicated with an oil through oil groove A and an oil through oil groove B which are arranged on the output shaft 1, the oil inlet and the oil outlet are respectively packaged and sealed by an oil port cover 11, the check valves are respectively communicated with the inner cavity of the motor through pore canals, a check valve hole of the body shell 10 is arranged in a step hole shape, and the check valve body 6 is in a step shaft shape.

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

The step hole-shaped sealing section and the step shaft-shaped sealing section are both in two-section shapes.

As shown in figure 2, the check valve comprises a valve body 6, a large sealing ring 7, a small sealing ring 8 and a steel ball 9, the large end of a step-shaped hole valve hole of a body shell 10 is matched with the large end of a step shaft-shaped valve body 6 and is sealed by the large sealing ring 7, the small end of the step-shaped valve hole of the body shell 10 is matched with the small end of the step shaft-shaped valve body 6 and is sealed by the small sealing ring 8, the steel ball 9 is arranged in an inner cavity of the valve body 6, one end of the steel ball is abutted against an oil passage hole in the inner cavity of the valve body 6 to perform high-pressure oil liquid sealing, and the other end of the steel ball is deformed, riveted and limited through the thin wall of the inner cavity of the valve body 6. And the oil channel hole of the inner cavity of the valve body 6 is communicated with the inclined hole of 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 which is in contact with the spherical surface of the steel ball 9 for unidirectional sealing, and one end of the round surface of the inner hole limits the steel ball 9 in the inner hole of the channel through elastic deformation or adopts a step hole for unidirectional sealing.

The check valve is arranged in a 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 of the motor.

The valve hole of the one-way valve of the body shell 10 is in a step hole shape, and the valve body 6 of the one-way valve is in a step shaft shape. One end of the inclined hole at the valve hole of the one-way valve of the body shell 10 can not be communicated with the sealing step surface hole of the one-way valve to form a through hole channel.

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

The technical features of the above-mentioned embodiments can be combined arbitrarily, and for the sake of brevity, all possible combinations of the technical features in the above-mentioned embodiments are not described, however, as long as there is no contradiction between the combinations of the technical features, the combinations should be considered as being within the scope of the present specification, such as the stepped check valve being provided at different positions of the motor.

The above-mentioned embodiment only expresses one embodiment of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A kind of axial flow distribution cycloid hydraulic motor, including front cover and body shell that link firmly each other, and one end links firmly with body shell through the spacer disc, another end and the back cover links firmly the rotating stator engagement pair; 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 check valves, the check valves are respectively communicated with the oil inlet and the oil outlet and communicated with the inner cavity of the motor through a pore passage, a valve hole of the body shell check valve is in a step hole shape, and a valve body of the check valve is in a step shaft shape.

2. The axial flow gerotor hydraulic motor of claim 1, further comprising: the valve hole of the body shell one-way valve is that the size of the sealing section of the step hole-shaped outer port is larger than that of the sealing section of the step hole-shaped inner port, and the size of the sealing section of the step shaft-shaped outer end of the valve body of the one-way valve is larger than that of the sealing section of the step shaft-shaped inner end.

3. The axial flow gerotor hydraulic motor of claim 1 or 2, further comprising: the check valve consists of 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. The axial flow gerotor hydraulic motor of claim 3, further comprising: the check valve is arranged in the body shell valve hole at one time.

5. The axial flow gerotor hydraulic motor of claim 3, further comprising: the steel ball sets up at the valve body inner chamber, and one end is supported and is leaned on valve body inner chamber oil duct hole and carry out high-pressure fluid seal, and it is spacing that the other end passes through valve body inner chamber thin wall deformation riveting, valve body inner chamber oil duct hole and motor inner chamber communicate through the inclined hole.

6. The axial flow gerotor hydraulic motor of claim 5, further comprising: one end of the inclined hole cannot be communicated with the sealing step face hole of the one-way valve to form a through hole channel.

7. The axial flow gerotor hydraulic motor of claim 3, further comprising: the check valve is equivalently replaced by two combined parts, the check valve is divided into two sections, the two sections are divided according to the large end and the small end of the step, the large end of the step hole valve hole is sealed by a ball expansion type plug or a steel plug, and the small end of the step hole valve hole is hermetically provided with the check valve.

8. The axial flow gerotor hydraulic motor of claim 3, further comprising: the large sealing ring and the small sealing ring are O-shaped rings.