阅读说明：本技术 一种带有梭阀的摆线液压马达 (Cycloid hydraulic motor with shuttle valve ) 是由 于刚 于 2021-10-28 设计创作，主要内容包括：本发明属于涉及摆线液压马达领域,具体涉及一种带有梭阀的摆线液压马达,包括马达壳体,马达壳体内设有输出结构,以及与马达壳体连接的配流盘、定转子副、平衡盘和后盖,所述后盖与平衡盘之间设有工作腔,马达壳体上还设有第一油口和第二油口,第一油口和第二油口均与所述工作腔连通,还包括梭阀,所述梭阀包括两个梭阀进油口和梭阀出油口,梭阀出油口与工作腔连通；第一油口和第二油口分别与所述两个梭阀进油口连通；两个梭阀进油口不同时与梭阀出油口连通。本发明将现有技术的三个单向阀全部取消,使用一个梭阀对高压进油口进行选择,使对应的高压进油口与工作腔连通。梭阀孔及阀座材料较软,能保证良好的密封性,从而改进了容积效率。(The invention belongs to the field of cycloid hydraulic motors, and particularly relates to a cycloid hydraulic motor with a shuttle valve, which comprises a motor shell, wherein an output structure, a flow distribution disc, a stator-rotor pair, a balance disc and a rear cover are arranged in the motor shell, the flow distribution disc, the stator-rotor pair, the balance disc and the rear cover are connected with the motor shell, a working cavity is arranged between the rear cover and the balance disc, a first oil port and a second oil port are also arranged on the motor shell, the first oil port and the second oil port are both communicated with the working cavity, the cycloid hydraulic motor further comprises the shuttle valve, the shuttle valve comprises two shuttle valve oil inlets and a shuttle valve oil outlet, and the shuttle valve oil outlet is communicated with the working cavity; the first oil port and the second oil port are respectively communicated with the oil inlets of the two shuttle valves; the oil inlets of the two shuttle valves are not communicated with the oil outlets of the shuttle valves at the same time. The invention cancels all three check valves in the prior art, and uses one shuttle valve to select the high-pressure oil inlet so as to communicate the corresponding high-pressure oil inlet with the working cavity. The shuttle valve hole and the valve seat are made of softer materials, and good sealing performance can be guaranteed, so that the volume efficiency is improved.)

1. The utility model provides a cycloid hydraulic motor with shuttle valve, includes the motor casing, is equipped with output structure in the motor casing to and the valve plate, the stator and rotor pair, balance plate and the back lid of being connected with the motor casing, be equipped with the working chamber between back lid and the balance plate, still be equipped with first hydraulic fluid port and second hydraulic fluid port on the motor casing, first hydraulic fluid port and second hydraulic fluid port all with the working chamber intercommunication, its characterized in that:

the shuttle valve comprises two shuttle valve oil inlets and a shuttle valve oil outlet, and the shuttle valve oil outlet is communicated with the working cavity;

the first oil port and the second oil port are respectively communicated with the oil inlets of the two shuttle valves;

and the oil inlets of the two shuttle valves are not communicated with the oil outlets of the shuttle valves at the same time.

2. The gerotor hydraulic motor of claim 1, wherein the shuttle valve is disposed on a motor housing.

3. The cycloid hydraulic motor with the shuttle valve of claim 1 or 2 wherein the port plate, the stator and rotor pair, the balance plate and the rear cover are each provided with an oil passage, one end of the oil passage is communicated with the working chamber, and the other end of the oil passage is communicated with the shuttle valve oil outlet.

4. The gerotor hydraulic motor of claim 1, wherein the shuttle valve is disposed on the back cover.

5. The gerotor hydraulic motor with the shuttle valve as in any one of claims 1 or 4, wherein the motor housing, the port plate, the stator-rotor pair and the balance plate are respectively provided with a first oil passage and a second oil passage, one end of the first oil passage is communicated with the first oil port, and the other end of the first oil passage is communicated with a shuttle valve oil inlet of the shuttle valve;

and one end of the second oil path channel is communicated with the second oil port, and the other end of the second oil path channel is communicated with the oil inlet of the other shuttle valve.

Technical Field

The invention belongs to the field of cycloid hydraulic motors, and particularly relates to a cycloid hydraulic motor with a shuttle valve.

Background

The cycloid hydraulic motor is a common hydraulic driving device, is a low-speed large-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 improvement of the development level of industry and agriculture.

The balance disc of the cycloid hydraulic motor in the prior art is internally provided with three one-way valves and is used for leading high-pressure oil from a high-pressure cavity of the motor to enter a working cavity of the motor so as to deform the balance disc of the motor, thereby changing the axial clearance of a stator and a rotor pair.

Disclosure of Invention

In order to solve the problems, the invention provides a cycloid hydraulic motor with a shuttle valve, wherein three one-way valves in the prior art are completely omitted, and one shuttle valve is used for selecting a high-pressure oil inlet so as to communicate the corresponding high-pressure oil inlet with a working cavity. The shuttle valve hole and the valve seat are made of softer materials, and good sealing performance can be guaranteed, so that the volume efficiency is improved.

The scheme provided by the invention is as follows:

a cycloid hydraulic motor with a shuttle valve comprises a motor shell, wherein an output shaft structure is arranged in the motor shell, a valve plate, a stator-rotor pair, a balance plate and a rear cover are connected with the motor shell, and a working cavity is arranged between the rear cover and the balance plate. Due to the special structural design of the cycloid hydraulic motor, the stator and the rotor of the stator and rotor pair part have a thickness difference of 0.02-0.05mm, and the balance disc has the function of generating deformation when the cycloid hydraulic motor works at high pressure so as to reduce the thickness difference between the stator and the rotor and improve the volume ratio of the motor; high-pressure oil flows into the working cavity between the rear cover and the balance disc through the channel, so that the balance disc is deformed.

The motor shell is further provided with a first oil port and a second oil port, and the first oil port and the second oil port are communicated with the working cavity. The first oil port and the second oil port are two main oil ports of the motor, and when one of the main oil ports is a high-pressure oil inlet, the other main oil port is a low-pressure oil return port.

The shuttle valve comprises two shuttle valve oil inlets and a shuttle valve oil outlet, and the shuttle valve oil outlet is communicated with the working cavity. The shuttle valve is a hydraulic valve capable of selecting high pressure, and the oil outlet of the shuttle valve is only communicated with one of the oil inlets of the two shuttle valves, which is high in pressure, and cannot be communicated simultaneously.

The first oil port and the second oil port are respectively communicated with the oil inlets of the two shuttle valves, and when the first oil port is a high-pressure oil inlet, one side of the oil inlet of the shuttle valve communicated with the first oil port is high-pressure, and the oil inlet of the shuttle valve is communicated with the oil outlet of the shuttle valve, so that high-pressure oil can enter the working cavity after passing through the shuttle valve; on the contrary, when the second oil port is the high-pressure oil inlet, one side of the oil inlet of the shuttle valve communicated with the second oil port is high-pressure, and high-pressure oil can also enter the working cavity after passing through the shuttle valve. The disk seat and the valve opening of shuttle valve are softer than prior art's check valve, are difficult to lead to sealed badly because of the deformation of balance plate, effectively improve the volumetric efficiency.

The shuttle valve of the invention has two setting schemes.

The first scheme is as follows:

the shuttle valve is arranged on the motor shell and is generally arranged in parallel to the axis of the motor, one shuttle valve oil inlet of the shuttle valve is communicated with the first oil port, and the other shuttle valve oil inlet is communicated with the second oil port. Correspondingly, oil channels are arranged on the flow distribution plate, the stator and rotor pair, the balance plate and the rear cover, one end of each oil channel is communicated with the working cavity, the other end of each oil channel is communicated with an oil outlet of the shuttle valve, and high-pressure oil passes through the shuttle valve, is output from the oil outlet of the shuttle valve and enters the working cavity through the oil channels.

The shuttle valve is arranged on the motor shell, the valve body is easier to fix, and meanwhile, only one oil path channel needs to be opened to connect the working cavity and the oil outlet of the shuttle valve, so that the processing steps can be reduced, and the improvement of the production efficiency is facilitated.

The second scheme is as follows:

the shuttle valve is disposed on the back cover and is generally perpendicular to the motor axis. A first oil path channel and a second oil path channel are respectively arranged on the motor shell, the valve plate, the stator-rotor pair and the balance plate, one end of the first oil path channel is communicated with the first oil port, and the other end of the first oil path channel is communicated with an oil inlet of a shuttle valve of the shuttle valve; one end of the second oil path channel is communicated with the second oil port, and the other end of the second oil path channel is communicated with the oil inlet of the other shuttle valve; the oil outlet of the shuttle valve is directly communicated with the working cavity.

This scheme is covered with the shuttle valve setting in the back for the shuttle valve takes off more easily and maintains or changes.

Compared with the prior art, the invention has the advantages that:

1. the sealing performance is improved, and the volume efficiency of the hydraulic cycloid motor is improved.

2. The shuttle valve is convenient to detach and replace, and the maintenance cost is low.

Drawings

FIG. 1 is a view showing a structure of a shuttle valve portion in accordance with embodiment 1.

Fig. 2 is a partial structure view of a second port in embodiment 1.

Fig. 3 is a partially enlarged view of a portion a in fig. 1.

FIG. 4 is a sectional view of a part of the structure of example 1.

FIG. 5 is a balance plate structure pattern of example 1.

FIG. 6 is a sectional view in the top view of embodiment 2.

Fig. 7 is a partial sectional view of embodiment 2 with a shuttle valve.

FIG. 8 is a balance disc structure pattern of example 2.

FIG. 9 is a schematic structural view of example 3.

In the figure, 1, a motor shell, 2, a first oil port, 3, a shuttle valve, 4, a front oil path channel, 5, a second oil port, 6, a first shuttle valve oil inlet, 7, a second shuttle valve oil inlet, 8, a rear oil path channel, 9, a working cavity, 10, a distribution disc, 11, a stator and rotor pair, 12, a balance disc, 13, a rear cover, 14, a first oil path channel, 15, a second oil path channel, 16, an output shaft, 17, a thrust bearing, 18, a linkage shaft, 19, a compensation disc, 20, a spring, 21, a distribution valve, 22 and a bolt.

Detailed Description

The invention is further illustrated below with reference to the figures and examples.

Example 1

As shown in fig. 1 to 4, the shuttle valve 3 is installed inside the motor housing 1, the shuttle valve 3 is oriented parallel to the motor axis, and the valve seat is assembled from the face between the motor housing 1 and the port plate 10.

The first oil port 2 is communicated with a first shuttle valve oil inlet 6 on the left side through a front oil path passage 4, and the second oil port 5 is communicated with a T-shaped second shuttle valve oil inlet 7 on the right side through the front oil path passage 4. The oil outlet of the shuttle valve is arranged on the side surface of the steel ball in the shuttle valve and is communicated to the working cavity 9 through a rear oil passage 8 which sequentially passes through the motor shell 1, the valve plate 10, the stator and rotor pair 11, the balance plate 12 and the rear cover 13.

When the first oil port 2 is a high-pressure oil inlet, high-pressure oil enters the first shuttle valve oil inlet 6 on the left side through the front oil path passage 4, the high pressure forces the steel ball to block the second shuttle valve oil inlet 7 rightwards, only the first oil port 2 can be communicated to the working cavity 9 through the shuttle valve 3 at the moment, and the high-pressure oil enters the working cavity to work; correspondingly, when the second oil port 5 is a high-pressure oil inlet, the high-pressure oil enters the second shuttle valve oil inlet 7 on the right side through the front oil path 4, the high pressure forces the steel ball to block the first shuttle valve oil inlet 6 leftwards, only the second oil port 5 can be communicated to the working cavity 9 through the shuttle valve 3 at the moment, and the high-pressure oil enters the working cavity to work.

As shown in fig. 5, the balance disc 12 is provided with only one corresponding rear oil passage 8 in the present embodiment.

Example 2

As shown in fig. 6 and 7, the shuttle valve 3 is installed in the back cover 13, the installation direction of the shuttle valve 3 is perpendicular to the axis of the motor, and the valve seat can be assembled and fixed from the upper side of the back cover 13.

In the embodiment, two oil-way passages are needed to be arranged, one end of a first oil-way passage 14 is communicated with a first oil port 2, and the other end of the first oil-way passage passes through a motor shell, a flow distribution disc and a balance disc and is communicated with an oil inlet of a T-shaped second shuttle valve on the upper side; correspondingly, one end of the second oil passage is communicated with the second oil port, and the other end of the second oil passage is communicated with the oil inlet of the first shuttle valve on the lower side after penetrating through the motor shell, the valve plate and the balance plate. The oil outlet of the shuttle valve is directly communicated to the working cavity.

When the first oil port 2 is a high-pressure oil inlet, the high-pressure oil enters the second shuttle valve oil inlet 7 on the upper side through the first oil path passage 14, the high pressure forces the steel ball to block the first shuttle valve oil inlet 6 downwards, only the first oil port 2 can be communicated to the working cavity 9 through the shuttle valve at the moment, and the high-pressure oil enters the working cavity to work; when the second oil port 5 is a high-pressure oil inlet, high-pressure oil enters the first shuttle valve oil inlet 6 on the lower side through the second oil passage 15, the steel ball is forced upwards by high pressure to block the second shuttle valve oil inlet 7, only the second oil port can be communicated to the working cavity through the shuttle valve at the moment, and the high-pressure oil enters the working cavity to work.

As shown in fig. 8, the balance disc 12 used in this embodiment needs to be provided with a first oil passage 14 and a second oil passage 15.

Example 3

As shown in fig. 9, an output shaft structure is arranged in the motor housing 2, and a port plate 10, a stator-rotor pair 11, a balance plate 12 and a rear cover 13 are sequentially connected with the motor housing 2, a thrust bearing 17 is arranged in the housing to overcome the hydraulic axial force in the motor, and an output shaft 16 is arranged in the housing and connected with the rotor through a linkage shaft 18. A spring 20 is arranged in the shell, the spring 20 is connected with a compensation disc 19, and a sealing part is assembled between the compensation disc 19 and the motor shell to separate a high-pressure cavity and a low-pressure cavity of the motor. The shell is internally provided with a flow distribution system consisting of a flow distribution valve 21 and a flow distribution disc 10 to realize the rotation of the motor rotor, so that the rotation is transmitted to an output shaft 16 through a linkage shaft 18 for output, and the shell is provided with a bolt 22 to play a role of fixedly connecting a stator-rotor pair 11, a balance disc 12, the flow distribution system and a rear cover 13.