CN111577705A - End cover and hydraulic device - Google Patents
End cover and hydraulic device Download PDFInfo
- Publication number
- CN111577705A CN111577705A CN202010558203.8A CN202010558203A CN111577705A CN 111577705 A CN111577705 A CN 111577705A CN 202010558203 A CN202010558203 A CN 202010558203A CN 111577705 A CN111577705 A CN 111577705A
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- boss
- oil drainage
- drainage groove
- groove
- oil
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- 238000009826 distribution Methods 0.000 claims abstract description 44
- 230000008878 coupling Effects 0.000 claims abstract description 3
- 238000010168 coupling process Methods 0.000 claims abstract description 3
- 238000005859 coupling reaction Methods 0.000 claims abstract description 3
- 210000003734 kidney Anatomy 0.000 claims description 5
- 238000013022 venting Methods 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 11
- 238000010586 diagram Methods 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000033001 locomotion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1438—Cylinder to end cap assemblies
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1476—Special return means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/149—Fluid interconnections, e.g. fluid connectors, passages
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Hydraulic Motors (AREA)
Abstract
The embodiment of the invention provides an end cover and a hydraulic device, and relates to the technical field of hydraulic pressure. This end cover is used for cooperating with hydraulic means's rotating part, and the end cover includes: an end cap body, one side of which is provided with an end face; the boss, boss and this body coupling of end cover, and the boss sets up in the middle part position of terminal surface, and the boss is for the terminal surface protrusion, and the boss is provided with the flow distribution face, and the flow distribution face is used for cooperating with rotary part contact. The flow distribution surface arranged through the boss is in direct contact fit with the rotating part of the hydraulic device, and the flow distribution surface is arranged on the boss, so that the area of the flow distribution surface can be reduced, meanwhile, the processing precision can be increased to a certain degree, and the processing difficulty and the later maintenance difficulty can be reduced.
Description
Technical Field
The invention relates to the technical field of hydraulic pressure, in particular to an end cover and a hydraulic device.
Background
The hydraulic motor is an actuator of the hydraulic system, which converts the hydraulic pressure energy provided by the hydraulic pump into mechanical energy (torque and rotational speed) of its output shaft. Liquids are media that transmit forces and motions.
At present, a rear cover (end cover) used on a hydraulic motor has the defects of overlarge machining of a flow distribution surface, high maintenance difficulty and high machining difficulty.
Disclosure of Invention
The invention aims to provide an end cover which can be in direct contact fit with a rotating component of a hydraulic device through a flow distribution surface arranged on a boss, wherein the flow distribution surface is arranged on the boss, the area of the flow distribution surface can be reduced, meanwhile, the processing precision can be increased to a certain extent, and the processing difficulty and the later maintenance difficulty can be reduced.
The invention also aims to provide a hydraulic device which can be in direct contact fit with a rotating part through a flow distribution surface arranged on a boss, wherein the flow distribution surface is arranged on the boss, so that the area of the flow distribution surface can be reduced, meanwhile, the processing precision can be increased to a certain extent, and the processing difficulty and the later maintenance difficulty can be reduced.
Embodiments of the invention may be implemented as follows:
an embodiment of the present invention provides an end cap for cooperating with a rotating component of a hydraulic device, the end cap comprising:
an end cap body, one side of which is provided with an end face;
the boss, the boss with this body coupling of end cover, just the boss set up in the middle part position of terminal surface, the boss for the terminal surface protrusion, the boss is provided with the flow distribution face, the flow distribution face be used for with rotary part contact cooperation.
Optionally, the boss is provided with an oil drainage groove.
Optionally, the oil drainage groove is arc-shaped; the oil drainage groove is provided with a plurality of oil drainage grooves, and the plurality of oil drainage grooves are positioned on the circumference of the same preset circle.
Optionally, the oil drainage groove includes a first oil drainage groove, a second oil drainage groove, a third oil drainage groove and a fourth oil drainage groove, the first oil drainage groove, the second oil drainage groove, the third oil drainage groove and the fourth oil drainage groove are arranged at intervals, the first oil drainage groove and the second oil drainage groove are symmetrically arranged about a first straight line, the third oil drainage groove and the fourth oil drainage groove are symmetrically arranged about the first straight line, the first oil drainage groove and the fourth oil drainage groove are symmetrically arranged about a second straight line, and the second oil drainage groove and the third oil drainage groove are symmetrically arranged about the second straight line;
the first straight line and the second straight line are straight lines preset along the radial direction of the preset circle, and the first straight line is perpendicular to the second straight line.
Optionally, the boss is further provided with a first kidney-shaped groove and a second kidney-shaped groove, and the first kidney-shaped groove and the second kidney-shaped groove are used for respectively feeding oil and discharging oil;
the first kidney-shaped groove and the second kidney-shaped groove are both positioned on the circumference of the preset circle;
the first kidney-shaped groove and the second kidney-shaped groove are symmetrically arranged relative to the first straight line;
the first oil drainage groove and the fourth oil drainage groove are distributed at two ends of the first kidney-shaped groove;
the second oil drainage groove and the third oil drainage groove are distributed at two ends of the second kidney-shaped groove.
Optionally, the end cap body is integrally formed with the boss.
Optionally, the boss is a cylinder, a bottom surface of the boss is connected with the end surface and is coplanar, and a top surface of the boss forms the flow distribution surface.
Optionally, a bearing hole is formed in the middle of the boss, and an oil through groove for draining oil at the bearing hole is further formed in the boss.
Optionally, the oil through groove extends in a radial direction of the boss.
The embodiment of the invention also provides a hydraulic device which comprises a rotating component and the end cover, wherein the flow distribution surface of the boss of the end cover is in contact fit with the rotating component.
The end cover and the hydraulic device of the embodiment of the invention have the beneficial effects of, for example:
the boss is protruding to be established on the terminal surface of end cover body, and it is located the middle part position of terminal surface, and like this, the flow distribution face that this boss set up can cooperate with hydraulic means's rotary part direct contact, and the flow distribution face sets up on the boss, can reduce the area of flow distribution face, simultaneously, can increase the machining precision to a certain extent to can also reduce the maintenance degree of difficulty of the processing degree of difficulty and later stage. And, because set up the flow distribution surface on the boss, relatively speaking, can reduce the thickness of end cover body for the axial dimension of whole hydraulic equipment reduces, and the volume of whole hydraulic equipment will reduce relatively like this, can effectively improve the power ratio of whole hydraulic equipment.
The hydraulic device comprises the end cover, and the hydraulic device has the full functions of the end cover.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a hydraulic apparatus provided in this embodiment;
fig. 2 is a schematic structural diagram of the end cap according to the present embodiment at a first viewing angle;
fig. 3 is a schematic structural diagram of the end cap according to the second viewing angle;
fig. 4 is a schematic structural diagram of the end cap according to the third viewing angle.
Icon: 1000-hydraulic means; 100-end cap; 10-an end cap body; 11-end face; 12-oil port; 13-a threaded hole; 20-boss; 21-flow distribution surface; 22-an oil drainage groove; 221-a first drainage groove; 222-a second drainage groove; 223-a third oil drainage groove; 224-a fourth drainage groove; 23-a first kidney slot; 24-a second kidney slot; 25-oil through groove; 31-a bearing bore; 32-oil through hole; 200-presetting a circle; 210-a first straight line; 220-a second straight line; 300-a rotating member; 400-outer shell.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
At present, a rear cover (end cover) used on a hydraulic motor has the defects of overlarge processing of a structural flow distribution surface, high maintenance difficulty and high processing difficulty.
Referring to fig. 1, the present embodiment provides an end cover 100 and a hydraulic apparatus 1000, which can effectively alleviate the technical problem. The hydraulic device 1000 includes an end cover 100, a rotary member 300, and an outer housing 400, and the rotary member 300 is mounted between the end cover 100 and the outer housing 400.
Referring to fig. 2-4, in particular, the end cap 100 includes:
the end cap body 10 includes an end face 11 on one side of the end cap body 10.
The boss 20, the boss 20 is connected with the end cover body 10, and the boss 20 sets up in the middle part position of terminal surface 11, and the boss 20 is protruding for terminal surface 11, and the boss 20 is provided with the flow distribution face 21, and the flow distribution face 21 cooperates with the contact of rotary part 300.
In other words, the end cover 100 is used for matching with the rotating component 300 of the hydraulic device 1000, and specifically, the flow distribution surface 21 of the boss 20 of the end cover 100 is in contact matching with the rotating component 300.
The boss 20 is convexly arranged on the end face 11 of the end cover body 10, and is located in the middle of the end face 11, so that the flow distribution surface 21 arranged on the boss 20 can be in direct contact fit with the rotating part 300 of the hydraulic device 1000, the flow distribution surface 21 is arranged on the boss 20, the area of the flow distribution surface 21 can be reduced, meanwhile, the processing precision can be increased to a certain extent, and the processing difficulty and the later maintenance difficulty can be reduced. Moreover, as the flow distribution surface 21 is arranged on the boss 20, the thickness of the end cover body 10 can be relatively reduced, so that the axial size of the whole hydraulic equipment is reduced, the volume of the whole hydraulic equipment is relatively reduced, and the power ratio of the whole hydraulic equipment can be effectively improved. The hydraulic device 1000 includes the end cap 100, which has all of the functions of the end cap 100.
The hydraulic device 1000 may be a hydraulic motor, or a hydraulic pump, and from the viewpoint of energy conversion, the hydraulic pump and the hydraulic motor are hydraulic components that work reversibly, and when working fluid is input to any hydraulic pump, the hydraulic pump can be set to a hydraulic motor operating condition; on the contrary, when the main shaft of the hydraulic motor is driven by the external moment to rotate, the working condition of the hydraulic pump can be changed. Because they have the same basic structural elements: closed and periodically variable volume and corresponding oil distribution mechanism.
In other words, the end cover 100 can be applied to a hydraulic motor and a hydraulic pump, and the hydraulic device 1000 with the end cover 100 installed thereon can have a small flow distribution surface 21, and the processing difficulty and the later maintenance difficulty are reduced.
In the present embodiment, the hydraulic device 1000 is described as an example of a hydraulic motor. Meanwhile, the hydraulic motor includes structures of different forms such as a plunger type and a vane type, and specifically, the present embodiment is described by taking the hydraulic motor as the plunger type as an example. It is understood that the present embodiment will focus on the scenario where the end cap 100 is applied to a plunger-type hydraulic motor, but those skilled in the art will appreciate that the end cap 100 may also be applied to a vane-type hydraulic motor, and may also be applied to a plunger-type or vane-type hydraulic pump.
Referring to fig. 2 and 3, in the present embodiment, the boss 20 is provided with a drainage groove 22. The oil drainage groove 22 can play a role in heat dissipation, pressure reduction, throttling and the like. Specifically, the drainage groove 22 is arc-shaped; the number of the oil drainage grooves 22 is multiple, and the multiple oil drainage grooves 22 are positioned on the circumference of the same preset circle 200.
In this embodiment, the plurality of oil drainage grooves 22 are located on the circumference of the same preset circle 200, so that the whole structure is more reasonable, and the functions of better heat dissipation, pressure reduction, throttling and the like can be achieved. The shape of the oil drainage groove 22 is not limited to the arc shape, and in other embodiments, the oil drainage groove 22 may be straight, wavy, bent, and the like.
In this embodiment, the oil drainage groove 22 includes a first oil drainage groove 221, a second oil drainage groove 222, a third oil drainage groove 223 and a fourth oil drainage groove 224, the first oil drainage groove 221, the second oil drainage groove 222, the third oil drainage groove 223 and the fourth oil drainage groove 224 are arranged at intervals, the first oil drainage groove 221 and the second oil drainage groove 222 are symmetrically arranged about a first straight line 210, the third oil drainage groove 223 and the fourth oil drainage groove 224 are symmetrically arranged about the first straight line 210, the first oil drainage groove 221 and the fourth oil drainage groove 224 are symmetrically arranged about a second straight line 220, and the second oil drainage groove 222 and the third oil drainage groove 223 are symmetrically arranged about the second straight line 220.
The first straight line 210 and the second straight line 220 are straight lines preset along the radial direction of the preset circle 200, and the first straight line 210 is perpendicular to the second straight line 220.
The four oil drainage grooves 22 can be understood as a two-by-two symmetrical design, which greatly improves the impact performance of the entire hydraulic motor.
In this embodiment, the boss 20 is further provided with a first kidney-shaped groove 23 and a second kidney-shaped groove 24, and the first kidney-shaped groove 23 and the second kidney-shaped groove 24 are used for respectively feeding oil and discharging oil. The first and second slots 23 and 24 are located on the circumference of the preset circle 200. The first and second slots 23 and 24 are symmetrically arranged with respect to the first line 210. The first oil drainage groove 221 and the fourth oil drainage groove 224 are distributed at both ends of the first kidney groove 23. The second oil drainage groove 222 and the third oil drainage groove 223 are distributed at both ends of the second kidney-shaped groove 24.
The first and second slots 23 and 24 are arranged to facilitate oil inlet and outlet, but their shapes may not be arranged to be kidney-shaped, such as arc-shaped, wave-shaped, etc.
In this embodiment, the end cap body 10 and the boss 20 are integrally formed. Thus, the whole structure has stronger stability, and the performance of the whole hydraulic motor can be improved. The end cover 100 may be formed by a mold, so that the end cover body 10 and the boss 20 may be integrated, or the end cover 100 may be cut to integrate the end cover body 10 and the boss 20, of course, in other embodiments, the end cover body 10 and the boss 20 may also be fixed by welding.
In this embodiment, the boss 20 is a cylinder, the bottom surface of the boss 20 is connected to and coplanar with the end surface 11, and the top surface of the boss 20 forms a flow distribution surface 21.
The boss structure of the cylinder, the axis of this boss 20 is collinear with the output shaft of whole hydraulic motor, so improve the stability of hydraulic motor operation. The end cap body 10 is rectangular, the end face 11 is rectangular, and the axis of the boss 20 passes through the center of the end cap body 10.
In this embodiment, the boss 20 has a cylindrical structure, and both the top surface and the bottom surface are circular, and the areas of the top surface and the bottom surface are the same. Of course, in other embodiments, the boss 20 may also be a circular truncated cone structure. That is, the top surface and the bottom surface of the circular truncated cone structure are circular, but the areas are not the same. For example, the lands 20 may have a larger area on the bottom surface and a smaller area on the top surface.
With reference to fig. 3 and 4, in this embodiment, a bearing hole 31 is disposed in the middle of the boss 20, and the boss 20 is further provided with an oil through groove 25 for draining oil from the bearing hole 31.
The bearing hole 31 is generally used for mounting a bearing, and heat dissipation, pressure reduction, and the like are also required here, so that oil drainage is performed by providing the oil through groove 25 here, and the performance of the bearing when the bearing is operated in cooperation with the boss 20 can be improved. Specifically, the bearing hole 31 penetrates the boss 20 and the end cover body 10.
In the present embodiment, the oil through groove 25 extends in the radial direction of the boss 20. Due to the design, the structure of the whole boss 20 is more reasonable, and the performance during operation can be improved.
In this embodiment, the end cover body 10 is further provided with an oil port 12 and four threaded holes 13, the four threaded holes 13 are distributed at four ends of the end cover body 10, and the threaded holes 13 are matched with fasteners to integrally mount and fix the end cover 100 to a casing of the hydraulic motor. The boss 20 is also provided with an oil through port 32 for oil through.
The end cover 100 and the hydraulic device 1000 provided by the embodiment have at least the following advantages:
in this embodiment, boss 20 is provided with flow distribution surface 21, and direct and the rotary part 300 contact cooperation of flow distribution surface 21 through boss 20 has reduced the area of flow distribution surface 21 greatly for terminal surface 11 is as flow distribution surface 21, consequently, has reduced the machined surface to reduce the maintenance degree of difficulty in processing degree of difficulty and later stage, can also improve the precision of processing simultaneously. Further, since the boss 20 is directly in contact with the rotary member 300 and is directly in contact with the end surface 11 with respect to the rotary member 300, the original performance can be maintained on the premise of reducing the thickness of the end cover body 10 in manufacturing. Therefore, the axial size of the core part of the hydraulic motor can be reduced, so that the axial size of the whole hydraulic motor is reduced, the volume of the hydraulic motor can be smaller, and a sufficient power ratio can be ensured.
In this embodiment, by setting the first arc-shaped oil drainage groove 221, the second oil drainage groove 222, the third oil drainage groove 223, and the fourth oil drainage groove 224, the four oil drainage grooves 22 can be understood as two-two symmetry, and the impact performance of the whole hydraulic motor can be greatly improved by setting the position shapes of the four oil drainage grooves 22. Meanwhile, the four oil drainage grooves 22 are all arranged on the boss 20, so that the service performance of the hydraulic motor can be improved under the condition that the axial dimension of the whole hydraulic motor is shorter.
In a whole view, the end cap 100 has the characteristics of simple structure, easy maintenance, low cost and the like.
In summary, the embodiment of the present invention provides the end cover 100 and the hydraulic device 1000, the boss 20 is convexly disposed on the end surface 11 of the end cover body 10, and is located at the middle position of the end surface 11, so that the flow distribution surface 21 disposed on the boss 20 can be in direct contact with and cooperate with the rotating component 300 of the hydraulic device 1000, and the flow distribution surface 21 is disposed on the boss 20, which can reduce the area of the flow distribution surface 21, and at the same time, can increase the processing precision to a certain extent, and can also reduce the processing difficulty and the maintenance difficulty in the later period. Moreover, as the flow distribution surface 21 is arranged on the boss 20, the thickness of the end cover body 10 can be relatively reduced, so that the axial size of the whole hydraulic equipment is reduced, the volume of the whole hydraulic equipment is relatively reduced, and the power ratio of the whole hydraulic equipment can be effectively improved.
The hydraulic device 1000 includes the end cap 100 described above, which has all of the functions of the end cap 100.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. An end cap for engaging a rotating component of a hydraulic device, the end cap comprising:
an end cap body, one side of which is provided with an end face;
the boss, the boss with this body coupling of end cover, just the boss set up in the middle part position of terminal surface, the boss for the terminal surface protrusion, the boss is provided with the flow distribution face, the flow distribution face be used for with rotary part contact cooperation.
2. An end cap according to claim 1, wherein the boss is provided with an oil drainage groove.
3. The end cap of claim 2, wherein the drainage groove is arcuate in shape; the oil drainage groove is provided with a plurality of oil drainage grooves, and the plurality of oil drainage grooves are positioned on the circumference of the same preset circle.
4. An end cover according to claim 3, wherein the oil drainage groove comprises a first oil drainage groove, a second oil drainage groove, a third oil drainage groove and a fourth oil drainage groove, the first oil drainage groove, the second oil drainage groove, the third oil drainage groove and the fourth oil drainage groove are arranged at intervals, the first oil drainage groove and the second oil drainage groove are symmetrically arranged about a first straight line, the third oil drainage groove and the fourth oil drainage groove are symmetrically arranged about the first straight line, the first oil drainage groove and the fourth oil drainage groove are symmetrically arranged about a second straight line, and the second oil drainage groove and the third oil drainage groove are symmetrically arranged about the second straight line;
the first straight line and the second straight line are straight lines preset along the radial direction of the preset circle, and the first straight line is perpendicular to the second straight line.
5. The end cap of claim 4, wherein the boss is further provided with a first kidney slot and a second kidney slot for oil ingress and egress, respectively;
the first kidney-shaped groove and the second kidney-shaped groove are both positioned on the circumference of the preset circle;
the first kidney-shaped groove and the second kidney-shaped groove are symmetrically arranged relative to the first straight line;
the first oil drainage groove and the fourth oil drainage groove are distributed at two ends of the first kidney-shaped groove;
the second oil drainage groove and the third oil drainage groove are distributed at two ends of the second kidney-shaped groove.
6. An end closure according to any of claims 1 to 5, wherein the end closure body is integrally formed with the boss.
7. An end cap according to any one of claims 1 to 5, wherein the boss is cylindrical, the bottom surface of the boss being connected to and coplanar with the end face, the top surface of the boss forming the flow distribution surface.
8. An end cover according to claim 7, wherein a bearing hole is formed in the middle of the boss, and an oil through groove for draining oil at the bearing hole is formed in the boss.
9. An end closure according to claim 8, wherein said oil venting groove extends radially of said boss.
10. A hydraulic apparatus comprising a rotatable member and an end cap according to any one of claims 1 to 9, wherein the flow distribution surface of the boss of the end cap is in contact engagement with the rotatable member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010558203.8A CN111577705A (en) | 2020-06-18 | 2020-06-18 | End cover and hydraulic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010558203.8A CN111577705A (en) | 2020-06-18 | 2020-06-18 | End cover and hydraulic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111577705A true CN111577705A (en) | 2020-08-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010558203.8A Pending CN111577705A (en) | 2020-06-18 | 2020-06-18 | End cover and hydraulic device |
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| CN (1) | CN111577705A (en) |
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