CN215672534U

CN215672534U - Hydraulic motor

Info

Publication number: CN215672534U
Application number: CN202120743952.8U
Authority: CN
Inventors: 邱明田
Original assignee: Yufan Machinery Technology Shanghai Co ltd
Current assignee: Yufan Machinery Technology Shanghai Co ltd
Priority date: 2021-04-12
Filing date: 2021-04-12
Publication date: 2022-01-28
Anticipated expiration: 2031-04-12

Abstract

The utility model provides a hydraulic motor, comprising a shell; the plunger pump comprises a cylinder body and a plunger rod, the cylinder body is sleeved at one end of the transmission shaft, an oil distribution disc is further mounted on one side, close to the cylinder body, of the shell, an oil inlet and an oil return port are formed in the oil distribution disc, the oil inlet and the oil return port are respectively communicated with the cylinder body, a thrust bearing is further sleeved on the transmission shaft, and the thrust bearing is connected with the plunger rod; the driving component is in transmission connection with the other end of the transmission shaft. The plunger pump motor replaces a transmission hydraulic motor, so that the radial size of the motor is reduced, the volume and the mass of the motor are further reduced, and the requirement on installation space is lower; the hydraulic motor of the plunger pump structure has higher working efficiency than a gear pump motor and lower production and assembly cost. The utility model discloses a have simple to operate, power is big, the quality is small, can realize the advantage of the power-mass ratio of product maximize.

Description

Hydraulic motor

Technical Field

The utility model relates to the field of hydraulic motors, in particular to a hydraulic motor.

Background

Traditional starter motor is the gear pump motor, and the gear pump is when realizing high-power requirement, and is general great to the gear pump radial dimension requirement. Although the gear pump motor is convenient to manufacture, the working efficiency of the gear pump is obviously lower than that of a hydraulic motor with a plunger pump structure when the gear pump is under high pressure and large flow; the larger volume and the larger mass place higher demands on the engine installation space.

In view of the above, there is a need for a new hydraulic motor that solves or at least alleviates the above technical drawbacks.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a hydraulic motor, and aims to solve the technical problems of low power, large volume and large mass of a gear pump motor in the prior art.

To achieve the above object, the present invention provides a hydraulic motor including:

a housing;

the plunger pump comprises a cylinder body and a plunger rod, the cylinder body is sleeved at one end of the transmission shaft, an oil distribution disc is further mounted on one side, close to the cylinder body, of the shell, an oil inlet and an oil return port are formed in the oil distribution disc, the oil inlet and the oil return port are respectively communicated with the cylinder body, a thrust bearing is further sleeved on the transmission shaft, and the thrust bearing is connected with the plunger rod;

and the driving assembly is arranged in the shell and is in transmission connection with the other end of the transmission shaft.

Optionally, a driving gear is further arranged in the housing, and the driving gear is connected with the driving assembly through a ratchet wheel.

Optionally, the casing periphery cover is equipped with mounting flange, mounting flange with still be provided with adjusting shim between the casing periphery.

Optionally, the housing is made of an aluminum alloy.

Optionally, a first cavity, a second cavity and a connecting cavity for connecting the first cavity and the second cavity are formed in the casing, the plunger pump is arranged in the first cavity, the driving assembly is arranged in the second cavity, the hydraulic motor further comprises a sealing ring sleeved on the transmission shaft, the sealing ring is arranged in the connecting cavity, and the outer circular surface of the sealing ring is in sealing fit with the inner wall surface of the connecting cavity.

Optionally, the sealing ring includes a first ring, a second ring and a connecting portion, the first ring and the second ring are disposed opposite to each other, and an outer circumferential surface of the first ring and an outer circumferential surface of the second ring are both in sealing engagement with the inner wall surface of the housing.

Optionally, a circular groove is formed between the connecting portion and the first ring and between the connecting portion and the second ring, and a sealing ring is arranged in the circular groove.

Optionally, a clamp spring and a bearing are further arranged on the transmission shaft, the clamp spring is tightly attached to the first circular ring, and the bearing is tightly attached to the second circular ring.

Optionally, a first lubricating layer is arranged on one side of the cylinder body facing the oil distribution disc, and a second lubricating layer is arranged on one side of the oil distribution disc facing the cylinder body.

Optionally, the first and second lubricating layers are both molybdenum disulfide layers.

In the above technical solution of the present invention, the hydraulic motor includes a housing; the plunger pump comprises a cylinder body and a plunger rod, the cylinder body is sleeved at one end of the transmission shaft, an oil distribution disc is further mounted on one side, close to the cylinder body, of the shell, an oil inlet and an oil return port are formed in the oil distribution disc, the oil inlet and the oil return port are respectively communicated with the cylinder body, a thrust bearing is further sleeved on the transmission shaft, and the thrust bearing is connected with the plunger rod; the driving component is in transmission connection with the other end of the transmission shaft. In the scheme, the plunger pump motor replaces a transmission hydraulic motor, the structure is more compact in installation, the radial size of the motor is reduced, the size and the mass of the motor are further reduced, and the requirement on the installation space is lower; and, and gear pump motor transmission shaft is split type structure, the manufacturing cost of production and assembly, and the hydraulic motor work efficiency of plunger pump structure is higher than the gear pump motor, and production and assembly cost are lower moreover. The utility model discloses a have simple to operate, power is big, the quality is small, can realize the advantage of the power-mass ratio of product maximize.

Drawings

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

Fig. 1 is a schematic perspective view of a hydraulic motor according to an embodiment of the present invention;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is a cross-sectional view of FIG. 1;

FIG. 4 is a schematic perspective view of a seal according to an embodiment of the present invention;

FIG. 5 is a schematic perspective view of a sealing member (gasket) according to an embodiment of the present invention;

FIG. 6 is a schematic view of a cylinder and an oil distribution pan according to an embodiment of the present invention.

The reference numbers illustrate:

1. a housing; 101. a first cavity; 102. a second cavity; 2. a plunger pump; 21. a cylinder body; 22. a plunger rod; 3. sealing the circular ring; 31. an inner circular surface; 32. an outer circular surface; 33. a first circular ring; 34. a second circular ring; 35. a seal ring; 36. a circular groove; 4. a drive assembly; 5. a drive shaft; 6. a clamp spring; 7. a bearing; 8. an oil distribution disc; 9. an oil inlet; 10. an oil return port; 11. a thrust bearing; 12. installing a flange; 13. adjusting the gasket; 14. the gears are driven.

The implementation, functional features and advantages of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

It should be noted that all the directional indicators (such as the upper and lower … …) in the embodiment of the present invention are only used to explain the relative position relationship, movement, etc. of the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

Moreover, the technical solutions in the embodiments of the present invention may be combined with each other, but it is necessary to be able to be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent, and is not within the protection scope of the present invention.

Referring to fig. 1 to 6, the present invention provides a hydraulic motor including:

a housing 1;

the plunger pump 2 comprises a cylinder body 21 and a plunger rod 22, the cylinder body 21 is sleeved at one end of the transmission shaft 5, an oil distribution disc 8 is further installed on one side, close to the cylinder body 21, of the shell 1, an oil inlet 9 and an oil return port 10 are formed in the oil distribution disc 8, the oil inlet 9 and the oil return port 10 are respectively communicated with the cylinder body 21, a thrust bearing 11 is further sleeved on the transmission shaft 5, and the thrust bearing 11 is connected with the plunger rod 22; the driving component 4 is connected with the other end of the transmission shaft 5 in a transmission way.

In the above embodiment, hydraulic oil is injected into the plunger rods 22 arranged in the cylinder 21 of the plunger pump 22 through the high-pressure oil pipe from the oil inlet 9, the plunger rod 22 on one side is under the pressure of the hydraulic oil, the plunger rod 22 on one side is under the action of oil return negative pressure, and the plunger rod 22 circularly reciprocates in the cylinder 21. Under the restraint of the swash plate thrust bearing 1111 and the oil distribution disc 8, the cylinder body 21 of the plunger pump 2 rotates around the transmission shaft 5 of the hydraulic motor, the transmission shaft 5 of the hydraulic motor rotates to apply work outwards, and pressure energy is converted into mechanical energy for rotating the hydraulic motor. In the embodiment, the motor of the plunger pump 2 replaces a transmission gear pump motor, so that the structure is more compact in installation, the radial size of the motor is reduced, the volume and the mass of the motor are further reduced, and the requirement on installation space is lower; and, gear pump motor transmission shaft 5 is split type structure in traditional design, the manufacturing cost of production and assembly, and the hydraulic motor work efficiency of 2 structures of plunger pump is higher than the gear pump motor, and production and assembly cost are lower moreover. The embodiment has the advantages of convenient installation, high power, small mass and volume and capability of realizing the power-mass ratio of the product maximization. Specifically, the thrust bearing 11 may be a swash plate thrust bearing 11.

Further, a driving gear 14 is arranged in the housing 1, and the driving gear 14 is connected with the driving assembly 4 through a ratchet wheel, so that the uniqueness of the rotating direction of the driving gear 14 can be ensured.

Furthermore, a mounting flange 12 is sleeved on the outer periphery of the shell 1, and an adjusting gasket 13 is further arranged between the mounting flange 12 and the outer periphery of the shell 1. The mounting flange 12 is used to mount the hydraulic motor to an external mounting bracket or other base, and the adjustment gasket 13 may be a resilient gasket so that the mounting flange 12 can withstand some compression or impact.

Further, the housing 1 is made of an aluminum alloy. In order to realize the manufacturability of the processing and the lightweight of the product structure, the shell 1 can be made of an aluminum alloy material, specifically, 7075T6 aluminum alloy material, and the material has high strength and good mechanical property and anode reaction. The method can also be used for manufacturing airplane structures and other high-stress structural parts requiring high strength and strong corrosion resistance.

Further, a first cavity 101, a second cavity 102 and a connecting cavity for connecting the first cavity 101 and the second cavity 102 are formed in the casing 1, the plunger pump 2 is arranged in the first cavity 101, the driving assembly 4 is arranged in the second cavity 102, the driving assembly 4 is in transmission connection with the transmission shaft 5, the hydraulic motor further comprises a sealing ring 3 sleeved on the transmission shaft 5, the sealing ring 3 is arranged in the connecting cavity, and the outer circular surface 32 of the sealing ring 3 is in sealing fit with the inner wall surface of the connecting cavity. Because the plunger pump 2 contains hydraulic oil, the sealing ring 3 can prevent the oil from leaking from the first cavity 101 to the second cavity 102, and can pollute the components of the driving assembly 4 and the like in the second cavity 102. The sealing ring 3 mainly plays a role in sealing, the inner circular surface 31 of the sealing ring 3 is sleeved on the transmission shaft 5, and the outer circular surface 32 of the sealing ring 3 is in sealing fit with the inner wall surface of the shell 1, so that oil can be prevented from leaking from a gap between the shell 1 and the transmission shaft 5, and the oil leakage prevention function is achieved. Specifically, it may be that oil is prevented from leaking out from one end of the plunger pump 2. The sealing ring further comprises an inner circular surface 31, the inner circular surface 31 cooperating with the drive shaft 5. This embodiment has the advantage that the oil leak at the 5 ends of the transmission shaft can be prevented.

Further, the volume of the connection chamber is smaller than the volume of the first chamber body 101, and the volume of the connection chamber is smaller than the volume of the second chamber body 102. The connecting cavity is equivalent to a narrow channel between the first cavity 101 and the second cavity 102, and is used for the transmission shaft 5 to pass through, and meanwhile, the connecting cavity is small, so that the first cavity 101 and the second cavity 102 are conveniently isolated, and oil leakage is prevented.

Further, the sealing ring 3 comprises a first ring 33, a second ring 34 and a connecting part for connecting the first ring 33 and the second ring 34, wherein the first ring 33 and the second ring 34 are arranged oppositely, and the outer circular surface of the first ring 33 and the outer circular surface of the second ring 34 are in sealing fit with the inner wall surface of the shell 1. The sealing ring 3 is composed of two layers of rings, and the outer circular surfaces 32 of the two layers of rings are in sealing fit with the inner wall surface of the shell 1. In particular, it may be a sealing fit with the inner wall surface of the connection chamber. By the sealing fit of the two layers of rings, the sealing performance of the sealing ring 3 can be further improved compared to a single layer of ring.

Further, a circular groove 36 is formed between the connecting portion and the first and

second rings

33 and 34, and a sealing ring 35 is disposed in the circular groove 36. Specifically, the sealing ring 35 may be an elastic ring, and the sealing ring 35 is also in sealing fit with the inner wall surface of the housing 1, so that the sealing performance of the sealing ring 3 can be further improved.

Furthermore, the transmission shaft 5 is further provided with a clamp spring 6 and a thrust bearing 11, the clamp spring 6 is tightly attached to the first circular ring 33, and the thrust bearing 11 is tightly attached to the second circular ring 34. The clamp spring 6 can play a role in positioning and placing the sealing ring 3 to slide, and the thrust bearing 11 is arranged to facilitate the rotation of the transmission shaft 5.

Further, the plunger pump 2 comprises a cylinder 21, an oil distribution disc 8 is arranged at one end of the housing 1 close to the cylinder 21, a first lubricating layer is arranged at one side of the cylinder 21 facing the oil distribution disc 8, and a second lubricating layer is arranged at one side of the oil distribution disc 8 facing the cylinder 21. The oil distribution disc 8 may be made of an aluminium alloy material and treated by a surface T6 (solution treatment plus full artificial ageing). Because of the friction between the oil distribution disc 8 and the cylinder body 21, a lubricating coating is arranged on the contact surface between the oil distribution disc and the cylinder body, so that the friction and the abrasion of parts are reduced, and meanwhile, a good sealing effect can be achieved. Specifically, the first lubricating layer and the second lubricating layer are both molybdenum disulfide layers. The molybdenum disulfide layer has excellent wear resistance, bearing and lubricating properties in a high-temperature environment, and can play a role in surface protection, corrosion prevention, sealing, lubrication and prolonging the service life of parts.

The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents made by the claims and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A hydraulic motor, comprising:

a housing;

2. The hydraulic motor of claim 1, wherein a drive gear is further disposed within the housing, the drive gear being ratcheted with the drive assembly.

3. The hydraulic motor as claimed in claim 1, wherein a mounting flange is mounted around the housing, and a spacer is disposed between the mounting flange and the housing.

4. The hydraulic motor of claim 1, wherein the housing is made of an aluminum alloy.

5. The hydraulic motor according to any one of claims 1 to 4, wherein a first cavity, a second cavity, and a connecting cavity connecting the first cavity and the second cavity are formed in the housing, the plunger pump is disposed in the first cavity, the driving assembly is disposed in the second cavity, the hydraulic motor further includes a sealing ring sleeved on the transmission shaft, the sealing ring is disposed in the connecting cavity, and an outer circumferential surface of the sealing ring is in sealing fit with an inner wall surface of the connecting cavity.

6. The hydraulic motor according to claim 5, wherein the sealing ring includes a first ring, a second ring, and a connecting portion connecting the first ring and the second ring, the first ring and the second ring being disposed opposite to each other, and an outer circumferential surface of the first ring and an outer circumferential surface of the second ring are both in sealing engagement with an inner wall surface of the housing.

7. The hydraulic motor of claim 6, wherein a circular groove is formed between the connecting portion and the first and second rings, and a sealing ring is disposed in the circular groove.

8. The hydraulic motor of claim 6, wherein the transmission shaft is further provided with a clamp spring and a bearing, the clamp spring is arranged to be attached to the first ring, and the bearing is arranged to be attached to the second ring.

9. The hydraulic motor of claim 1, wherein a side of the cylinder block facing the oil distribution pan is provided with a first lubricating layer, and a side of the oil distribution pan facing the cylinder block is provided with a second lubricating layer.

10. The hydraulic motor of claim 7, wherein the first and second lubrication layers are each a molybdenum disulfide layer.