阅读说明：本技术 液压马达 (Hydraulic motor ) 是由 邱明田 于 2021-08-06 设计创作，主要内容包括：本发明提供一种液压马达,包括壳体内形成的第一容纳腔和第二容纳腔,第一容纳腔内设置有驱动齿轮、输出轴和驱动组件,驱动齿轮和驱动组件通过棘轮连接,驱动齿轮套装于输出轴；第二容纳腔内设置有柱塞泵和传动轴,柱塞泵包括缸体和柱塞杆,缸体套装于传动轴设置,传动轴靠近第一容纳腔的一端套装有推力轴承,传动轴远离第一容纳腔的一端延伸至壳体的第二端部,柱塞杆与推力轴承连接；及套装于壳体外周的安装环,安装环四周设置有第一连接孔,壳体外周还设置有与壳体一体成型的固定板,固定板、弹性垫片、安装环通过螺纹紧固件连接。该液压马达具有安装方便、功率大、质量体积小,能实现产品最大化的功率质量比和确保安装牢固,噪音小的优点。(The invention provides a hydraulic motor, which comprises a first accommodating cavity and a second accommodating cavity formed in a shell, wherein a driving gear, an output shaft and a driving assembly are arranged in the first accommodating cavity; a plunger pump and a transmission shaft are arranged in the second accommodating cavity, the plunger pump comprises a cylinder body and a plunger rod, the cylinder body is sleeved on the transmission shaft, a thrust bearing is sleeved at one end, close to the first accommodating cavity, of the transmission shaft, one end, far away from the first accommodating cavity, of the transmission shaft extends to the second end part of the shell, and the plunger rod is connected with the thrust bearing; the mounting ring is sleeved on the periphery of the shell, first connecting holes are formed in the periphery of the mounting ring, a fixing plate which is integrally formed with the shell is further arranged on the periphery of the shell, and the fixing plate, the elastic gasket and the mounting ring are connected through threaded fasteners. The hydraulic motor has the advantages of convenience in installation, high power, small mass and volume, capability of realizing the maximum power-mass ratio of a product and ensuring firm installation and low noise.)

1. A hydraulic motor, comprising:

a housing;

a first accommodating cavity and a second accommodating cavity are formed in the shell, a driving gear, an output shaft and a driving assembly are arranged in the first accommodating cavity, the driving gear and the driving assembly are connected through a ratchet wheel, the driving gear is sleeved on the output shaft, and one end of the output shaft extends to the first end of the shell;

a plunger pump and a transmission shaft are arranged in the second accommodating cavity, the plunger pump comprises a cylinder body and a plunger rod, the cylinder body is sleeved on the transmission shaft, a thrust bearing is sleeved at one end, close to the first accommodating cavity, of the transmission shaft, one end, far away from the first accommodating cavity, of the transmission shaft extends to the second end part of the shell, and the plunger rod is connected with the thrust bearing; and

the mounting ring is sleeved on the periphery of the shell, first connecting holes are formed in the periphery of the mounting ring, a fixing plate which is integrally formed with the shell is further arranged on the periphery of the shell, second connecting holes are formed in positions, corresponding to the first connecting holes of the mounting ring, of the fixing plate, a groove is formed between the fixing plate and the mounting ring, an elastic gasket is arranged in the groove, third connecting holes are formed in positions, corresponding to the first connecting holes and the second connecting holes, of the elastic gasket, and the fixing plate, the elastic gasket and the mounting ring are connected through threaded fasteners.

2. The hydraulic motor of claim 1, wherein the resilient pad comprises two sub-pads disposed closely to each other, and each sub-pad has the third connecting hole disposed therein.

3. The hydraulic motor of claim 1, wherein the number of the first connecting holes, the second connecting holes and the third connecting holes is four, four of the first connecting holes are respectively disposed around the mounting ring, four of the second connecting holes are respectively disposed around the fixing plate, and four of the third connecting holes are respectively disposed around the elastic gasket.

4. The hydraulic motor of claim 1, wherein an opening is formed at an end of the second accommodating chamber away from the first accommodating chamber, an oil distribution disc is mounted on the opening, an oil inlet and an oil return port are formed on the oil distribution disc, and the oil inlet and the oil return port are respectively communicated with the cylinder block.

5. The hydraulic motor according to any one of claims 1 to 4, wherein a through cavity communicating the first accommodating cavity and the second accommodating cavity is formed in the housing, a seal assembly is disposed in the through cavity, the transmission shaft passes through the seal assembly and is connected with the drive assembly, and an outer wall surface of the seal assembly is in sealing fit with an inner wall surface of the through cavity.

6. The hydraulic motor of claim 5, wherein the sealing assembly comprises a first ring, a second ring and a connecting portion, the first ring and the second ring are oppositely arranged, the inner circular surfaces of the first ring and the second ring are respectively connected with the outer wall surface of the transmission shaft, and the outer circular surface of the first ring and the outer circular surface of the second ring are in sealing fit with the inner wall surface of the through cavity.

7. The hydraulic motor of claim 6, wherein the sealing assembly further comprises a clamp spring sleeved on the transmission shaft and a sealing bearing, the clamp spring is arranged on one side of the sealing assembly close to the first cavity, and the sealing bearing is arranged on one side of the sealing assembly close to the second cavity.

8. A hydraulic motor according to claim 4, wherein a first lubricating layer is provided on the side of the cylinder block facing the oil distribution pan, and a second lubricating layer is provided on the side of the oil distribution pan facing the cylinder block.

9. The hydraulic motor of claim 1, wherein the first end of the housing is provided with an output bearing that is sleeved on the output shaft, and the second end of the housing is provided with a drive bearing that is sleeved on the drive shaft.

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

Technical Field

The invention 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 gear pump has low working efficiency when the high pressure is high and the flow rate is high, the volume and the mass of the gear pump are large, the requirement on the installation space is high, and the installation labor intensity of an operator is high. And under the condition of high pressure and large flow, the gear pump has larger overall vibration due to larger work doing, and is easy to loosen from the mounting body.

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

Disclosure of Invention

The invention mainly aims to provide a hydraulic motor, and aims to solve the technical problems that a gear pump motor in the prior art is easy to loosen due to large vibration, low in power and large in volume and mass.

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

a housing;

a first accommodating cavity and a second accommodating cavity are formed in the shell, a driving gear, an output shaft and a driving assembly are arranged in the first accommodating cavity, the driving gear and the driving assembly are connected through a ratchet wheel, the driving gear is sleeved on the output shaft, and one end of the output shaft extends to the first end of the shell;

a plunger pump and a transmission shaft are arranged in the second accommodating cavity, the plunger pump comprises a cylinder body and a plunger rod, the cylinder body is sleeved on the transmission shaft, a thrust bearing is sleeved at one end, close to the first accommodating cavity, of the transmission shaft, one end, far away from the first accommodating cavity, of the transmission shaft extends to the second end part of the shell, and the plunger rod is connected with the thrust bearing; and

the mounting ring is sleeved on the periphery of the shell, first connecting holes are formed in the periphery of the mounting ring, a fixing plate which is integrally formed with the shell is further arranged on the periphery of the shell, second connecting holes are formed in positions, corresponding to the first connecting holes of the mounting ring, of the fixing plate, a groove is formed between the fixing plate and the mounting ring, an elastic gasket is arranged in the groove, third connecting holes are formed in positions, corresponding to the first connecting holes and the second connecting holes, of the elastic gasket, and the fixing plate, the elastic gasket and the mounting ring are connected through threaded fasteners.

Optionally, the elastic gasket includes two sub-gaskets disposed closely, and each of the sub-gaskets is provided with the third connecting hole.

Optionally, the number of the first connecting holes, the number of the second connecting holes and the number of the third connecting holes are four, the four first connecting holes are respectively arranged around the mounting ring, the four second connecting holes are respectively arranged around the fixing plate, and the four third connecting holes are respectively arranged around the elastic gasket.

Optionally, an opening is formed in one end, far away from the first accommodating cavity, of the second accommodating cavity, an oil distribution disc is installed on the opening, an oil inlet and an oil return port are formed in the oil distribution disc, and the oil inlet and the oil return port are communicated with the cylinder body respectively.

Optionally, a through cavity communicating the first accommodating cavity and the second accommodating cavity is formed in the housing, a sealing assembly is arranged in the through cavity, the transmission shaft penetrates through the sealing assembly to be connected with the driving assembly, and the outer wall surface of the sealing assembly is in sealing fit with the inner wall surface of the through cavity.

Optionally, the sealing assembly includes a first ring, a second ring and a connecting portion, the first ring and the second ring are disposed opposite to each other, the inner circular surfaces of the first ring and the second ring are respectively connected to the outer wall surface of the transmission shaft, and the outer circular surface of the first ring and the outer circular surface of the second ring are in sealing fit with the inner wall surface of the through cavity.

Optionally, the sealing assembly further comprises a clamp spring sleeved on the transmission shaft and a sealing bearing, the clamp spring is arranged on one side of the sealing assembly close to the first cavity, and the sealing bearing is arranged on one side of the sealing assembly close to the second cavity.

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 end of the housing is provided with an output bearing, the output bearing is sleeved on the output shaft, the second end of the housing is provided with a transmission bearing, and the transmission bearing is sleeved on the transmission shaft.

Optionally, the housing is an aluminum alloy housing.

In the above technical solution of the present invention, the hydraulic motor includes a housing; a first accommodating cavity and a second accommodating cavity are formed in the shell, a driving gear, an output shaft and a driving assembly are arranged in the first accommodating cavity, the driving gear and the driving assembly are connected through a ratchet wheel, the driving gear is sleeved on the output shaft, and one end of the output shaft extends to a first end part of the shell; a plunger pump and a transmission shaft are arranged in the second accommodating cavity, the plunger pump comprises a cylinder body and a plunger rod, the cylinder body is sleeved on the transmission shaft, a thrust bearing is sleeved at one end, close to the first accommodating cavity, of the transmission shaft, one end, far away from the first accommodating cavity, of the transmission shaft extends to the second end part of the shell, and the plunger rod is connected with the thrust bearing; the mounting ring is sleeved on the periphery of the shell, first connecting holes are formed in the periphery of the mounting ring, a fixing plate which is integrally formed with the shell is further arranged on the periphery of the shell, second connecting holes are formed in positions, corresponding to the first connecting holes of the mounting ring, of the fixing plate, a groove is formed between the fixing plate and the mounting ring, an elastic gasket is arranged in the groove, third connecting holes are formed in positions, corresponding to the first connecting holes and the second connecting holes, of the elastic gasket, and the fixing plate, the elastic gasket and the mounting ring are connected through threaded fasteners. In the scheme, the plunger pump motor replaces a transmission gear pump 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 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. Moreover, the collar is used for installing hydraulic motor on outside mounting bracket or other bases, and rethread threaded fastener connects collar and resilient pad on the fixed plate, is favorable to improving their joint strength. The elastic gaskets are arranged in the grooves and can be abutted against two side edges of the grooves, so that the elastic gaskets are not easy to deform. Through the cushioning effect of elastic gasket, reduce the impact that hydraulic motor vibrations caused the external installation body in the course of the work, ensure that hydraulic motor installs firmly on the external installation body, can also reduce the noise in the course of the work. The invention has the advantages of convenient installation, high power, small mass and volume, capability of realizing the maximum power-mass ratio of the product and ensuring firm installation and low noise.

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 a cross-sectional view of FIG. 1;

FIG. 3 is an exploded 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 seal 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:

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

1. A housing; 101. a first accommodating chamber; 102. a second accommodating chamber; 103. a fixing plate; 1031. a second connection hole; 2. a plunger pump; 21. a cylinder body; 22. a plunger rod; 3. a seal assembly; 31. an inner circular surface; 32. an outer circular surface; 33. a first circular ring; 34. a second circular ring; 4. a drive assembly; 5. a drive shaft; 6. a clamp spring; 7. sealing the bearing; 8. an oil distribution disc; 9. an oil inlet; 10. an oil return port; 11. a thrust bearing; 12. a mounting ring; 121. a first connection hole; 13. an elastic pad; 131. a sub-gasket; 132. a third connection hole; 14. a drive gear; 15. an output shaft; 17. an output bearing; 18. and a drive bearing.

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;

a first accommodating cavity 101 and a second accommodating cavity 102 are formed in the shell 1, a driving gear 14, an output shaft 15 and a driving assembly 4 are arranged in the first accommodating cavity 101, the driving gear 14 and the driving assembly 4 are connected through a ratchet wheel, the driving gear 14 is sleeved on the output shaft 15, and one end of the output shaft 15 extends to a first end part of the shell 1;

a plunger pump 2 and a transmission shaft 5 are arranged in the second accommodating cavity 102, the plunger pump 2 comprises a cylinder body 21 and a plunger rod 22, the cylinder body 21 is sleeved on the transmission shaft 5, a thrust bearing 11 is sleeved at one end, close to the first accommodating cavity 101, of the transmission shaft 5, one end, far away from the first accommodating cavity 101, of the transmission shaft 5 extends to the second end part of the shell 1, and the plunger rod 22 is connected with the thrust bearing 11; and

the utility model provides a position that suit is in collar 12 of casing 1 periphery, collar 12 is provided with first connecting hole 121 all around, and casing 1 periphery still is provided with fixed plate 103 with casing 1 integrated into one piece, and fixed plate 103 and the first connecting hole 121 of collar 12 correspond is provided with second connecting hole 1031, is formed with the recess between fixed plate 103 and the collar 12, be provided with elastic gasket 13 in the recess, elastic gasket 13 corresponds first connecting hole 121 and second connecting hole 1031 is provided with third connecting hole 132, and fixed plate 103, elastic gasket 13, collar 12 pass through threaded fastener and connect.

In the above embodiment, the hydraulic oil enters the plunger rod 22 from the cylinder 21 of the plunger pump 2 through the high-pressure oil pipe, the plunger rod 22 on one side is acted by the pressure of the hydraulic oil, the plunger rod 22 on one side is acted by the oil return negative pressure, and the plunger rod 22 circularly reciprocates in the cylinder 21. Under the restraint of the swash plate thrust bearing 11 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. The plunger pump 2 motor replaces a transmission gear pump motor, so that the structure installation is more compact, the radial size of the motor is reduced, the volume and the mass of the motor are further reduced, and the requirement on the installation space is lower; the hydraulic motor with the structure of the plunger pump 2 has higher working efficiency than a gear pump motor and lower production and assembly cost. Furthermore, the mounting ring 12 is used to mount the hydraulic motor on an external mounting frame or other base, and the mounting ring 12 and the elastic washer 13 are connected to the fixing plate 103 by a threaded fastener, which is beneficial to improving the connection strength of the mounting ring 12 and the elastic washer. The elastic pads 13 are disposed in the grooves, and specifically, the elastic pads 13 can abut against two side edges of the grooves, so that the elastic pads 13 are not easily deformed. Through the cushioning effect of elastic gasket 13, reduce the impact that hydraulic motor vibrations caused the external installation body in the course of the work, ensure that hydraulic motor installs firmly on the external installation body, can also reduce the noise in the course of the work. The embodiment has the advantages of convenient installation, large power, small mass and volume, capability of realizing the maximized power-mass ratio of the product and ensuring firm installation and low noise. In addition, the drive gear 14 is connected with the drive assembly 4 through a ratchet wheel, so that the uniqueness of the rotation direction of the drive gear 14 can be ensured. Further, the mounting ring 12 may be a mounting flange and the thrust bearing 11 may be a swash plate thrust bearing.

Further, the elastic pad 13 includes two sub-pads 131 disposed closely, and each sub-pad 131 is provided with a third connecting hole 132. Adopt two sub-gasket 131 settings, can improve the ability that elastic gasket 13 absorbed the cushion effect, two sub-gasket 131 complement each other, can avoid single gasket to produce permanent plastic deformation because of deformation is too big, reduce sealed and buffer capacity, further ensure the installation firm. The elastic gasket 13 is a metal gasket or a rubber gasket.

Further, the number of the first connection holes 121, the second connection holes 1031, and the third connection holes 132 are four, the four first connection holes 121 are respectively disposed around the mounting ring 12, the four second connection holes 1031 are respectively disposed around the fixing plate 103, and the four third connection holes 132 are respectively disposed around the elastic pad 13. Here, a plurality of connection holes are provided to fixedly connect the fixing plate 103, the mounting ring 12 and the elastic pad 13, which is advantageous for improving the tightness of the combination thereof, so that the hydraulic motor is firmly mounted on the external mounting body.

Further, an opening is formed at one end, away from the first accommodating cavity 101, of the second accommodating cavity 102, an oil distribution disc 8 is installed on the opening, an oil inlet 9 and an oil return port 10 are formed in the oil distribution disc 8, and the oil inlet 9 and the oil return port 10 are respectively communicated with the cylinder 21. Hydraulic oil can be injected into the plunger rods 22 arranged in the cylinder 21 of the plunger pump 2 in an array mode from the oil inlet 9 through the high-pressure oil pipe and is discharged through the oil return opening 10.

Further, a through cavity communicated with the first accommodating cavity 101 and the second accommodating cavity 102 is formed in the shell 1, a sealing assembly 3 is arranged in the through cavity, the transmission shaft 5 penetrates through the sealing assembly 3 to be connected with the driving assembly 4, and the outer wall surface of the sealing assembly 3 is in sealing fit with the inner wall surface of the through cavity. Since the plunger pump 2 contains hydraulic oil, the sealing assembly 3 can prevent the oil from leaking from the first accommodating chamber 101 to the second accommodating chamber 102, and can pollute the driving assembly 4 and other parts in the second accommodating chamber 102. The sealing component 3 mainly plays a role in sealing, the inner circular surface 31 of the sealing component 3 is sleeved on the transmission shaft 5, and the outer circular surface 32 of the sealing component 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 effect of preventing oil leakage is achieved. This embodiment has the advantage that the oil leak at the 5 ends of the transmission shaft can be prevented. Further, a first end portion of the housing 1 is provided with an output shaft 15 bearing 17, the output shaft 15 bearing 17 is sleeved on the output shaft 15, a second end portion of the housing 1 is provided with a transmission shaft 5 bearing 17, and the transmission shaft 5 bearing 17 is sleeved on the transmission shaft 5.

Further, the sealing assembly 3 comprises a first ring 33, a second ring 34 and a connecting portion for connecting the first ring 33 and the second ring 34, wherein the first ring 33 and the second ring 34 are arranged oppositely, the inner circular surfaces 31 of the first ring 33 and the second ring 34 are respectively connected with the outer wall surface of the transmission shaft 5, and the outer circular surface 32 of the first ring 33 and the outer circular surface 32 of the second ring 34 are in sealing fit with the inner wall surface of the through cavity. The sealing component 3 is composed of two layers of circular rings, and the outer circular surfaces 32 of the two layers of circular 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 through cavity. By the sealing cooperation of the two layers of rings, the sealing performance of the sealing assembly 3 can be further improved compared to a single layer of rings.

Further, the sealing assembly 3 further comprises a clamp spring 6 and a sealing bearing 7, the clamp spring 6 is sleeved on the transmission shaft 5, the clamp spring 6 is arranged on one side, close to the first cavity, of the sealing assembly 3, and the sealing bearing 7 is arranged on one side, close to the second cavity, of the sealing assembly 3. The clamp spring 6 can play a role in positioning and placing the sealing assembly 3 to slide, and the thrust bearing 11 is arranged to facilitate the rotation of the transmission shaft 5.

Further, a first lubricating layer is provided on the side of the cylinder block 21 facing the oil distribution pan 8, and a second lubricating layer is provided on the side of the oil distribution pan 8 facing the cylinder block 21. The oil distribution pan 8 may be made of an aluminum alloy material and treated by a surface T6. 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.

Further, the case 1 is an aluminum alloy case. 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.

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.