CN212250321U

CN212250321U - Coaxial installation plunger type hydraulic power device

Info

Publication number: CN212250321U
Application number: CN202021612276.2U
Authority: CN
Inventors: 何清华; 戴鹏; 李赛白; 方庆琯
Original assignee: Sunward Intelligent Equipment Co Ltd
Current assignee: Sunward Intelligent Equipment Co Ltd
Priority date: 2020-08-06
Filing date: 2020-08-06
Publication date: 2020-12-29
Anticipated expiration: 2030-08-06

Abstract

The utility model discloses a coaxial installation plunger type hydraulic power device, which comprises an intermediate body, a transmission shaft and two plunger type motors which are symmetrically arranged at the two sides of the intermediate body and have the same structure, one end of the transmission shaft is connected with the cylinder body of one plunger type motor, the other end of the transmission shaft penetrates through the intermediate body to be connected with the cylinder body of the other plunger type motor, the swash plate of the plunger type motor is arranged on one side far away from the intermediate body, the intermediate body is provided with a first oil port, a second oil port and a third oil port, wherein the axial plunger of one plunger motor is communicated with the first oil port through a port plate, the axial plunger of the other plunger motor is communicated with the second oil port through another port plate, the third oil port is simultaneously communicated with the axial plungers of the two plunger type motors through the two valve plates. The method and the device have the advantages of high synchronization precision, compact size and strong working condition adaptability.

Description

Coaxial installation plunger type hydraulic power device

Technical Field

The utility model belongs to the technical field of hydraulic transmission, especially, relate to a coaxial arrangement plunger type hydraulic power device.

Background

The hydraulic transmission has the advantages of high power density, stable work and the like, and is widely applied to the fields of engineering machinery, construction machinery, agricultural machinery, metallurgical machinery and the like. With the continuous development of machines, the synchronous movement of multiple actuators is more and more, and synchronous control is required.

The synchronous circuits commonly used at present mainly include throttling synchronous circuits and positive displacement synchronous circuits. For example, the throttle type synchronous loop using the flow-collecting and flow-dividing valve has the precision of 2% -5% and low cost. The positive displacement synchronous circuit may employ either a synchronous cylinder or a synchronous motor/pump. The synchronous gear motor type volume type synchronous element which is widely applied at present has the precision of 1-3% when the load pressure difference of an actuating element is not large, but has the synchronization precision of 10-15% when the load pressure difference of the actuating element is large, and can not meet the requirement of a high-pressure-difference synchronous circuit.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at provides a synchronous precision height, the size is compact, and operating mode strong adaptability's coaxial arrangement plunger type hydraulic power device.

In order to achieve the purpose, the following technical scheme is adopted in the application:

the coaxially-mounted plunger type hydraulic power device comprises an intermediate body, a transmission shaft and two plunger type motors which are symmetrically arranged on two sides of the intermediate body and have the same structure;

one end of the transmission shaft is connected with the cylinder body of one plunger type motor, the other end of the transmission shaft penetrates through the intermediate body to be connected with the cylinder body of the other plunger type motor, the swash plate of the plunger type motor is installed on one side far away from the intermediate body, and the intermediate body is provided with a first oil port, a second oil port and a third oil port;

the axial plunger of one plunger type motor is communicated with the first oil port through a port plate, the axial plunger of the other plunger type motor is communicated with the second oil port through the other port plate, and the third oil port is simultaneously communicated with the axial plungers of the two plunger type motors through the two port plates.

Specifically, a plurality of axial plungers of the cylinder block abut against an inclined surface of the swash plate, the transmission shaft penetrates through the swash plate and then is in transmission connection with a transmission hole of the cylinder block, the swash plate is fixedly connected with a motor shell of the plunger motor, and the motor shell is fixedly connected with the intermediate body.

Specifically, the axial plungers of the cylinder block are pressed against the swash plate via a return plate.

Specifically, the head of the axial plunger is provided with a sliding shoe, and a spring on the cylinder body presses the sliding shoe on the swash plate through the return plate.

Specifically, the transmission shaft is mounted on the motor housing through a bearing.

Specifically, the axial plunger is arranged in a plunger hole of the cylinder body, the valve plate is located between the cylinder body and the intermediate body, and the intermediate body is hermetically connected with the cylinder body, so that the valve plate is hermetically connected with the cylinder body.

Specifically, the transmission shaft is a through shaft or a combination of a plurality of transmission shafts mechanically connected through shaft sleeves.

Specifically, the swash plate is fixedly connected with the intermediate body through a swash plate fixing screw.

Compared with the prior art, the utility model discloses the beneficial effect who has lies in: 1) the two plunger type motors which are symmetrically arranged can realize the functions of a pump or a motor according to working conditions, and compared with a gear synchronous motor, the two plunger type motors have the advantages of high synchronous precision, compact size, strong working condition adaptability and the like; 2) the pressure of the other oil port can be controlled through the pressures of the other two oil ports, so that the purpose of pressurization or depressurization is achieved; 3) the oil port is arranged on the middle intermediate body, the whole power device is very compact in structure, and the oil port is more convenient to process.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural view of a coaxial installation plunger type hydraulic power device provided by the embodiment of the invention;

wherein: 1-a motor housing; 2-a bearing; 3-a swash plate; 4-a slipper; 5-an axial plunger; 6-cylinder body; 7-an intermediate; 8, mounting a bolt; 9-port plate; 10-a transmission shaft; y1 — first oil port; y2 — second oil port; y3-third port.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1, a coaxial installation plunger type hydraulic power device comprises an intermediate body 7 and two plunger type motors which are symmetrically arranged at two sides of the intermediate body 7 and have the same structure; the cylinder bodies 6 of the two plunger motors are mechanically connected through the same transmission shaft 10 penetrating through the intermediate body 7, the swash plate 3 of the plunger motors is installed at one side far away from the intermediate body 7, and the intermediate body 7 is provided with a first oil port Y1, a second oil port Y2 and a third oil port Y3, wherein;

the axial plunger 5 of one plunger motor is communicated with the first oil port Y1 through one valve plate 9, the axial plunger 5 of the other plunger motor is communicated with the second oil port Y1 through the other valve plate 9, the third oil port Y3 is simultaneously communicated with the axial plungers 5 of the two plunger motors through the two valve plates 9, and the two valve plates 9 are symmetrically arranged on two sides of the middle body 7. The transmission shaft 10 may be a through shaft, or may be a combination of a plurality of transmission shafts mechanically connected by shaft sleeves.

Referring to fig. 1, specifically, a plurality of plungers 5 of a cylinder 6 of a plunger motor abut against an inclined surface of a swash plate 3, the swash plate 3 is provided with a through hole in a penetrating manner, the through hole is coaxial with a transmission hole of the cylinder 6, a transmission shaft 10 penetrates through the through hole of the swash plate 3 to be in transmission connection with the transmission hole of the cylinder 6, the swash plate 3 is fixedly connected with a motor housing 1 of the plunger motor, the motor housing 1 is fixedly connected with an intermediate body 7 through a mounting bolt 8, and the transmission shaft 10 is mounted on the motor housing 1 through a bearing 2.

The plungers 5 of each cylinder block 6 are pressed against the swash plate 3 by a return plate, and specifically, a shoe is provided at the head of each plunger 5, and a spring of the cylinder block 6 presses the shoe against the swash plate 3 by the return plate.

Referring to fig. 1, the plunger 5 is arranged in a plunger 5 hole of the cylinder block 6, the port plate 9 is positioned between the cylinder block 6 and the intermediate body 7, the intermediate body 7 is hermetically connected with the cylinder block 6, so that the port plate 9 is hermetically connected with the cylinder block 6, and the swash plate 3 is tightly connected with the intermediate body 7 through a swash plate fixing screw.

Referring to fig. 1, a plurality of axially arranged plunger holes are uniformly distributed on a cylinder body 6, a plunger 5 is installed in the plunger hole of the cylinder body 6, a sliding shoe 4 is installed at the front end of the plunger and is pressed on a swash plate 3 through a spring, three oil ports are formed in an intermediate body 7, on-off control can be achieved by adding a control valve among the three pressure oil ports, oil inlet and outlet pressures of the oil ports are different, a driving motor rotates, output shafts are not arranged at two ends of the power device, and the driving motor rotates through combination of different pressures of the oil ports of the intermediate body, so that power conversion and transmission are achieved.

Referring to fig. 1, in the embodiment of the present application, a first oil port Y1 and a third oil port Y3 provided on the intermediate body 7 communicate with the port plate 9 on the left side, wherein one of the oil ports serves as an oil inlet for delivering high-pressure oil to the port plate 9, the port plate 9 is used for transmitting the hydraulic pressure of the high-pressure oil to the plurality of plungers 5 in the cylinder 6, so that the plurality of plungers 5 drive the cylinder 6 to rotate, and the other oil port serves as an oil outlet for outputting low-pressure oil of the port plate 9. Be provided with high-pressure region and low pressure region on the valve plate 9, high-pressure region is located the one side that is close to the oil inlet, and low pressure region is located the one side that is close to the oil-out, and high-pressure region and low pressure region all correspond a plurality of plungers 5 to the pressure differential through valve plate 9 promotes a plurality of plungers 5 and acts on to swash plate 3, with a plurality of plungers 5 concertina movement of inclined plane reaction through swash plate 3. The port plate 9 is used for distributing high and low oil paths in a hydraulic motor or pump, so that high pressure oil in the motor or pump outputs torque when acting, and high pressure oil in the cylinder 6 stopping outputting torque when low pressure oil (return oil) is exhausted. Similarly, the second oil port Y2 and the third oil port Y3 arranged on the intermediate body 7 are both communicated with the right valve plate 9, and the specific flow distribution process is the same as the analysis process, and is not described herein again.

Compared with a gear synchronous motor, the coaxial installation plunger type hydraulic power device has the advantages of high synchronization precision, compact size, strong working condition adaptability and the like. Because the plunger type motors are arranged in a left-right symmetrical mode and have the same structure, the coaxially-installed plunger type hydraulic power device can control the pressure of the other oil port through the pressures of the other two oil ports, and the purpose of pressurization or depressurization is achieved.

The above examples are merely illustrative of the present invention clearly and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. Nor is it intended to be exhaustive of all embodiments. And obvious changes and modifications may be made without departing from the scope of the present invention.

Claims

1. The coaxial installation plunger type hydraulic power device is characterized in that: the plunger type motor comprises an intermediate body (7), a transmission shaft (10) and two plunger type motors which are symmetrically arranged on two sides of the intermediate body (7) and have the same structure;

one end of the transmission shaft (10) is connected with the cylinder (6) of one plunger type motor, and the other end of the transmission shaft passes through the intermediate body (7) and is connected with the cylinder (6) of the other plunger type motor;

the swash plate (3) of the plunger type motor is installed on one side far away from the intermediate body (7), and a first oil port (Y1), a second oil port (Y2) and a third oil port (Y3) are formed in the intermediate body (7);

the axial plunger (5) of one plunger motor is communicated with the first oil port (Y1) through one valve plate (9), the axial plunger (5) of the other plunger motor is communicated with the second oil port (Y2) through the other valve plate (9), and the third oil port (Y3) is simultaneously communicated with the axial plungers (5) of the two plunger motors through the two valve plates (9).

2. The coaxially mounted plunger hydraulic power plant of claim 1, wherein: the axial plungers (5) of the cylinder body are abutted against the inclined surface of the swash plate (3), the transmission shaft (10) penetrates through the swash plate (3) and then is in transmission connection with the transmission hole of the cylinder body (6), the swash plate (3) is fixedly connected with a motor shell (1) of the plunger type motor, and the motor shell (1) is fixedly connected with the intermediate body (7).

3. The coaxially mounted plunger hydraulic power plant of claim 2, wherein: the axial pistons (5) of the cylinder block (6) are pressed against the swash plate (3) by a return plate.

4. A coaxially mounted plunger hydraulic power plant as in claim 3, characterized by: the head of the axial plunger (5) is provided with a sliding shoe (4), and a spring on the cylinder body (6) presses the sliding shoe (4) on the swash plate (3) through the return plate.

5. The coaxially mounted plunger hydraulic power plant of claim 2, wherein: the transmission shaft (10) is mounted on the motor housing (1) through a bearing (2).

6. The coaxially mounted plunger hydraulic power plant of claim 1, wherein: the transmission shaft (10) is a through shaft or a combination of a plurality of transmission shafts which are mechanically connected through shaft sleeves.

7. A coaxially mounted plunger hydraulic power plant as in any of the claims 1-6, characterized by: the axial plunger (5) is arranged in a plunger hole of the cylinder body (6), the valve plate (9) is located between the cylinder body (6) and the intermediate body (7), and the intermediate body (7) is in sealing connection with the cylinder body (6) so that the valve plate (9) is in sealing connection with the cylinder body (6).

8. The coaxially mounted plunger hydraulic power plant of claim 7, wherein: the swash plate (3) is fixedly connected with the intermediate body (7) through a swash plate fixing screw.