CN211874636U

CN211874636U - Motor flow distribution structure

Info

Publication number: CN211874636U
Application number: CN201922174988.4U
Authority: CN
Inventors: 李美钗; 彭锋; 王磊; 李小亮
Original assignee: Shanghai Pohu Drive System Co ltd
Current assignee: Shanghai Pohu Drive System Co ltd
Priority date: 2019-12-07
Filing date: 2019-12-07
Publication date: 2020-11-06
Anticipated expiration: 2029-12-07

Abstract

The utility model discloses a motor flow distribution structure belongs to hydraulic motor technical field. When high-pressure oil is introduced into the oil hole A on the motor shell, the high-pressure oil passes through the through hole of the pressure disc and the movement of the eccentric disc, so that a part of through holes of the flow distribution disc and the oil distribution hole of the flow distribution disc reach the oil cavity of the piston assembly, the piston assembly is pushed to move, the piston assembly simultaneously provides eccentric force for the crankshaft, the crankshaft is pushed to rotate, the crankshaft rotates to drive the eccentric disc to rotate, the size of the eccentric disc changes constantly, the eccentric distance between the inner control ring and the outer control ring connected with the eccentric disc in the cavity also changes constantly, the cam structure is changed, half of the oil ducts of the flow distribution disc are always located in the oil inlet cavity, and half of the oil ducts are located in the oil return cavity, so that the holes communicated with the piston assembly on the motor shell are smoothly communicated and disconnected, flow pulsation and torque pulsation are reduced, and low-speed stability is improved while torque.

Description

Motor flow distribution structure

Technical Field

The utility model belongs to the technical field of hydraulic motor, be a motor flow distribution structure particularly.

Background

The main flow distribution structure of the outer five-star radial plunger hydraulic motor in the current market is that a flow distribution shaft is connected with a crankshaft and is discontinuously communicated and cut off a plunger oil duct along with the rotation of the crankshaft. The flow distribution mode causes large torque pulsation of the motor and poor low-speed stability. And the outer five-star radial plunger hydraulic motor is larger in radial dimension, so that more reserved space is required in space.

Disclosure of Invention

Technical problem to be solved by the utility model

The utility model aims to solve the problem that the torque pulsation of current hydraulic motor is great, low-speed poor stability and structure are not compact.

Technical scheme

In order to achieve the above purpose, the utility model provides a technical scheme does:

the utility model discloses a motor flow distribution structure, which comprises a motor shell, wherein a plurality of piston assemblies are arranged on the motor shell, a plurality of piston assemblies are all connected with the motor shell through correspondingly arranged screw plug assemblies, a crankshaft is also arranged in the motor shell, a cam mechanism is arranged between the crankshaft and the motor shell, one end of the crankshaft is provided with a bearing I which is connected with a bearing end cover, the bearing end cover is connected with the motor shell through a screw II, one end of the crankshaft, which is far away from the bearing I, is provided with a bearing II which is connected with the motor shell, one side of the crankshaft, which is close to the bearing II, is provided with an eccentric disc, a flow distribution disc and a thrust disc are arranged on the eccentric disc, the flow distribution disc and the thrust disc are respectively arranged at two sides of the eccentric disc, the end surface of the thrust disc is provided with a spring, the outer side of the thrust disc, an inner control ring is arranged on the outer side of the eccentric disc, and an outer control ring is arranged on the outer side of the inner control ring.

Preferably, a plurality of piston moving holes are distributed on the circumference of the motor shell, the piston assembly is arranged in the piston moving holes, and the piston assembly reciprocates in the piston moving holes.

Preferably, the cam mechanism is engaged with and moved by a plurality of the piston assemblies.

Preferably, an oil inlet and an oil outlet are formed in the motor shell, and the oil inlet and the oil outlet are communicated with the cavity around the pressure disc, the cavity of the inner control ring, the cavity of the outer control ring, the cavity around the valve plate and an oil duct in a piston motion hole of the motor shell.

Preferably, the eccentric disc is connected with a crankshaft, and the crankshaft rotates to drive the eccentric disc to rotate.

Preferably, the port plate is communicated with an oil inlet and outlet cavity formed by the inner control ring and the outer control ring.

Preferably, the eccentric disc is connected with the inner control ring and the outer control ring, and the eccentric disc drives the inner control ring and the outer control ring to rotate.

Advantageous effects

Adopt the technical scheme provided by the utility model, compare with prior art, have following beneficial effect:

the utility model discloses a motor flow distribution structure, which comprises a motor shell, a plurality of piston assemblies are arranged on the motor shell, the plurality of piston assemblies are all connected with the motor shell through correspondingly arranged screw plug assemblies, a crankshaft is also arranged in the motor shell, a cam mechanism is arranged between the crankshaft and the motor shell, one end of the crankshaft is provided with a bearing I which is connected with a bearing end cover, the bearing end cover is connected with the motor shell through a screw II, one end of the crankshaft, which is far away from the bearing I, is provided with a bearing II which is connected with the motor shell, one side of the crankshaft, which is close to the bearing II, is provided with an eccentric disc, a flow distribution disc and a thrust disc are arranged on the eccentric disc, the flow distribution disc and the thrust disc are respectively arranged on two sides of the eccentric disc, the thrust disc is arranged on one side, which is far away from the bearing II, the end surface of the thrust, an outer control ring is arranged outside the inner control ring. When high-pressure oil is introduced into the oil hole A on the motor shell, the high-pressure oil passes through the through hole of the pressure plate and the movement of the eccentric disc, so that a part of through holes of the thrust plate and the oil distribution hole of the thrust plate reach the oil cavity of the piston assembly to push the piston assembly to move, at the same time, the piston assembly can simultaneously provide an eccentric force to the crankshaft to push the crankshaft to rotate, the crankshaft rotates to drive the eccentric disc to rotate, the size of the eccentric disc changes constantly, so that the eccentricity of the inner control ring and the outer control ring connected with the eccentric disc in the cavity is changed all the time, which becomes a cam structure, therefore, half of the oil ducts of the valve plate are always positioned in the oil inlet cavity, and half of the oil ducts are positioned in the oil return cavity, so that the holes communicated with the piston assembly on the motor shell are smoothly communicated and disconnected, flow pulsation and torque pulsation are reduced, smooth valve operation of the motor is guaranteed, torque pulsation of the hydraulic motor is reduced, and low-speed stability is improved. And through with the piston sub-assembly equipartition at motor housing circumference, saved the inner space, structurally compacter is applicable to the operating mode in narrow and small space.

Drawings

Fig. 1 is a schematic structural view of a motor flow distribution structure of the present invention;

fig. 2 is a partial schematic view of a motor flow distribution structure according to the present invention.

The reference numerals in the schematic drawings illustrate:

1. a motor housing; 2. a crankshaft; 3. a bearing end cap; 4. a first bearing; 5. a piston assembly; 6. a plug screw assembly; 7. a cam mechanism; 8. a second bearing; 9. a valve plate; 10. an eccentric disc; 11. an inner control loop; 12. an outer control loop; 13. a pressure disc; 14. a thrust disc; 15. a spring; 16. an end cap; 17. a first screw; 18. and a second screw.

Detailed Description

In order to facilitate understanding of the invention, the invention will be described more fully hereinafter with reference to the accompanying drawings, in which several embodiments of the invention are shown, but which can be embodied in many different forms and are not limited to the embodiments described herein, but which are provided so as to render the disclosure of the invention more thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present; when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present; the terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs; the terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention; as used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Example 1

Referring to the attached drawings 1-2, the motor flow distribution structure of the embodiment includes a motor housing 1, a plurality of piston assemblies 5 are disposed on the motor housing 1, the plurality of piston assemblies 5 are all connected to the motor housing 1 through screw plug assemblies 6 disposed correspondingly, a crankshaft 2 is further disposed in the motor housing 1, a cam mechanism 7 is disposed between the crankshaft 2 and the motor housing 1, one end of the crankshaft 2 is provided with a bearing 14 connected to a bearing end cap 3, the bearing end cap 3 is connected to the motor housing 1 through a screw 2, one end of the crankshaft 2 away from the bearing 4 is provided with a bearing 8 connected to the motor housing 1, one side of the crankshaft 2 near the bearing 8 is provided with an eccentric disc 10, the eccentric disc 10 is provided with a flow distribution disc 9 and a thrust disc 14, the flow distribution disc 9 and the thrust disc 14 are disposed at two sides of the eccentric disc 10 respectively, an end surface of the thrust disc 14 is provided with a spring 15, an outer side of the thrust disc, the pressure disc 13 is connected with an end cover 16 through a first screw 17, an inner control ring 11 is arranged on the outer side of the eccentric disc 10, and an outer control ring 12 is arranged on the outer side of the inner control ring 11.

A plurality of piston moving holes are distributed on the circumference of the motor shell 1 of the embodiment, the piston assembly 5 is arranged in the piston moving holes, and the piston assembly 5 reciprocates in the piston moving holes.

The cam mechanism 7 of the present embodiment is engaged with the plurality of piston assemblies 5 and is moved by the plurality of piston assemblies 5.

The motor housing 1 of the embodiment is provided with an oil inlet and an oil outlet, and the oil inlet and the oil outlet are communicated with the cavity around the pressure disc 13, the cavity around the inner control ring 11, the cavity around the outer control ring 12, the cavity around the port plate 9 and an oil duct on the piston motion hole of the motor housing 1.

The eccentric disc 10 of the present embodiment is connected to the crankshaft 2, and the crankshaft 2 rotates to drive the eccentric disc 10 to rotate.

The port plate 9 of the present embodiment is communicated with the oil inlet and outlet chambers formed by the inner control ring 11 and the outer control ring 12.

The eccentric disc 10 of this embodiment is connected to an inner control ring 11 and an outer control ring 12, and the eccentric disc 10 rotates the inner control ring 11 and the outer control ring 12.

The specific working mode of this embodiment is as follows: when high-pressure oil is introduced into the oil hole A of the motor shell 1, the high-pressure oil passes through the through hole of the pressure plate 13 and the movement of the eccentric disc 10, so that a part of the through hole of the thrust plate 9 and the oil distribution hole of the thrust plate 9 reach the oil cavity of the piston assembly 5 to push the piston assembly 5 to move, at the same time, the piston assembly 5 simultaneously gives an eccentric force to the crankshaft 2 to push the crankshaft 2 to rotate, the crankshaft 2 rotates to drive the eccentric disc 10 to rotate, the size of the eccentric disc 10 changes constantly, so that the eccentricity of the inner control ring 11 and the outer control ring 12 connected with the eccentric disc 10 in the cavity is also changed all the time, becoming a cam structure, therefore, half of the oil ducts of the valve plate 9 are always positioned in the oil inlet cavity, and half of the oil ducts are positioned in the oil return cavity, so that the holes in the motor shell 1, which are communicated with the piston assembly 5, are smoothly communicated and disconnected, flow pulsation and torque pulsation are reduced, and smooth valve operation of the motor is ensured.

Referring to fig. 1 and 2, when the oil hole B of the motor housing 1 is filled with high-pressure oil, the high-pressure oil directly passes through the motor housing 1 and the periphery of the outer control ring 12 to enter the port plate 9 and reach the oil chamber of the piston assembly 5, and pushes the piston assembly 5 to move, so that the motor rotates reversely.

One end of the eccentric disc 10 is provided with a thrust disc 14, the end surface of the thrust disc 14 is provided with a spring 15, the outer side of the thrust disc 14 is provided with a pressure disc 13, the pressure disc 13 is connected with an end cover 16 through a first screw 17,

as shown in fig. 1, the embodiment specifically includes: under the pressure effect of spring 15, push thrust disc 14 and paste eccentric disc 10, cooperate the use of sealing member again to make fluid not have the condition emergence of inside revealing, thereby guarantee the smooth work of this device.

The above-mentioned embodiments only express a certain implementation manner of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the present invention; it should be noted that, for those skilled in the art, without departing ┅ from the concept of the present invention, several variations and modifications can be made, which are within the scope of the present invention; therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A motor flow distribution structure is characterized in that: comprises a motor shell (1), a plurality of piston assemblies (5) are arranged on the motor shell (1), the piston assemblies (5) are connected with the motor shell (1) through corresponding screw plug assemblies (6), a crankshaft (2) is further arranged in the motor shell (1), a cam mechanism (7) is arranged between the crankshaft (2) and the motor shell (1), a bearing I (4) is arranged at one end of the crankshaft (2) and connected with a bearing end cover (3), the bearing end cover (3) is connected with the motor shell (1) through a screw II (18), a bearing II (8) is arranged at one end, far away from the bearing I (4), of the crankshaft (2) and connected with the motor shell (1), an eccentric disc (10) is arranged at one side, close to the bearing II (8), of the crankshaft (2), a flow distribution disc (9) and a thrust disc (14) are arranged on the eccentric disc (10), the flow distribution plate (9) and the thrust plate (14) are arranged on two sides of the eccentric plate (10) respectively, a spring (15) is arranged on the end face of the thrust plate (14), a pressure plate (13) is arranged on the outer side of the thrust plate (14), the pressure plate (13) is connected with an end cover (16) through a screw I (17), an inner control ring (11) is arranged on the outer side of the eccentric plate (10), and an outer control ring (12) is arranged on the outer side of the inner control ring (11).

2. A motor flow distribution structure according to claim 1, wherein: the motor is characterized in that a plurality of piston motion holes are distributed on the circumference of the motor shell (1), the piston assembly (5) is arranged in the piston motion holes, and the piston assembly (5) reciprocates in the piston motion holes.

3. A motor flow distribution structure according to claim 1, wherein: the cam mechanism (7) is jointed with the plurality of piston assemblies (5) and is driven by the plurality of piston assemblies (5) to move.

4. A motor flow distribution structure according to claim 1, wherein: an oil inlet and an oil outlet are formed in the motor shell (1), and are communicated with oil ducts on a cavity around the pressure disc (13), a cavity of the inner control ring (11), a cavity of the outer control ring (12), a cavity around the valve plate (9) and a piston motion hole of the motor shell (1).

5. A motor flow distribution structure according to claim 1, wherein: the eccentric disc (10) is connected with the crankshaft (2), and the crankshaft (2) rotates to drive the eccentric disc (10) to rotate.

6. A motor flow distribution structure according to any one of claims 1 and 4, wherein: and the port plate (9) is communicated with an oil inlet and outlet cavity formed by the inner control ring (11) and the outer control ring (12).

7. A motor flow distribution structure according to any one of claims 1 and 4, wherein: the eccentric disc (10) is connected with the inner control ring (11) and the outer control ring (12), and the eccentric disc (10) drives the inner control ring (11) and the outer control ring (12) to rotate.