CN220286113U - End cover assembly, hydraulic motor and engineering machinery - Google Patents

Abstract

The utility model provides an end cover assembly, a hydraulic motor and engineering machinery, wherein the end cover assembly comprises: the end cover body is provided with a first oil port and a second oil port; the balance valve comprises a valve body, wherein the valve body is detachably connected to the end cover body, the valve body and the end cover body are of a split structure, and a third oil port, a fourth oil port, a fifth oil port and a sixth oil port are formed in the valve body; and the connecting piece is suitable for connecting the valve body on the end cover body. In the structure, the end cover body does not need to cast a complex flow passage, and the processing and the manufacturing are simple. When the hydraulic control of end cover subassembly goes wrong, demolish the connecting piece, can dismantle the balanced valve from the end cover body, directly overhaul the balanced valve, convenient maintenance. When the flow channel in the balance valve is damaged, the balance valve is directly replaced, and the whole end cover assembly is not required to be replaced, so that the maintenance cost is low.

Description

End cover assembly, hydraulic motor and engineering machinery

Technical Field

The utility model relates to the technical field of hydraulic elements, in particular to an end cover assembly, a hydraulic motor and engineering machinery.

Background

As a common hydraulic element, a hydraulic motor is widely used in various engineering fields. The balance valve is a key adjusting mechanism in the hydraulic motor, is arranged on an end cover of the hydraulic motor and is used for adjusting and balancing the flow direction and the pressure of hydraulic oil in the hydraulic motor, so that the internal impact of a hydraulic system is reduced, and the working noise of the hydraulic motor is reduced.

In the prior art, the hydraulic motor structure adopts an end cover balance valve integrated structure, namely, the installation position of a balance valve core is cast in the end cover, and structures such as the balance valve core and the like are directly assembled at the corresponding position of the end cover in the assembly process, so that an integrated end cover assembly is formed. And then the hydraulic motor device is assembled into a complete hydraulic motor device through connection of the screw, the shell and other parts.

However, the hydraulic motor described above has the following problems: because the valve hole between the balance valve body and the balance valve core has high processing requirements, the internal flow passage of the end cover is complex, the processing is difficult, and the processing precision and the cost are high; the complexity of the flow channel in the end cover can increase the complexity of the troubleshooting and reduce the troubleshooting efficiency; the balance valve is too complex to disassemble and maintain, and once the flow passage inside the valve body is damaged, the whole end cover structure needs to be replaced.

Disclosure of Invention

Therefore, the technical problem to be solved by the utility model is to overcome the defects of complex structure, high processing difficulty and difficult maintenance of the end cover assembly of the hydraulic motor in the prior art, thereby providing the end cover assembly, the hydraulic motor and the engineering machinery.

In order to solve the above problems, the present utility model provides an end cap assembly comprising: the end cover body is provided with a first oil port and a second oil port; the balance valve comprises a valve body, wherein the valve body is detachably connected to the end cover body, the valve body and the end cover body are of a split structure, a third oil port, a fourth oil port, a fifth oil port and a sixth oil port are arranged on the valve body, the third oil port is communicated with the first oil port, the fourth oil port is communicated with the second oil port, one of the fifth oil port and the sixth oil port serves as an oil inlet, and the other one serves as an oil return port; and the connecting piece is suitable for connecting the valve body on the end cover body.

Optionally, the end cover body is provided with a first connecting hole, the valve body is provided with a second connecting hole, the connecting piece comprises a connecting column, and the connecting column penetrates through the first connecting hole and the second connecting hole.

Optionally, the connection post is a connection screw.

Optionally, the first connecting hole is a plurality of, and the second connecting hole is a plurality of, and a plurality of first connecting holes and second connecting hole one-to-one set up, and the spliced pole is a plurality of, and a plurality of spliced poles wear to establish in a plurality of first connecting holes and a plurality of second connecting holes.

Optionally, the plurality of first connecting holes and the plurality of second connecting holes are spaced apart along a connecting surface of the end cap body and the valve body.

Optionally, a first oil drain port is formed in the end cover body, a second oil drain port is formed in the valve body, and the first oil drain port is communicated with the second oil drain port.

Optionally, a first braking speed regulating oil port is arranged on the end cover body, a second braking speed regulating oil port is arranged on the valve body, and the first braking speed regulating oil port is communicated with the second braking speed regulating oil port.

Optionally, sealing rings are arranged between the first oil port and the third oil port, between the second oil port and the fourth oil port, between the first oil drain port and the second oil drain port, and between the first brake speed regulating oil port and the second brake speed regulating oil port.

The application also provides a hydraulic motor, comprising the end cover assembly.

The application also provides engineering machinery comprising the hydraulic motor.

The utility model has the following advantages:

by utilizing the technical scheme of the utility model, the end cover body and the balance valve are arranged to be of a split structure, and are connected through the connecting piece. The balance valve is used for carrying out oil inlet and oil return through the fifth oil port and the sixth oil port, hydraulic oil enters the end cover body from the valve body through the first oil port and the third oil port and the second oil port and the fourth oil port or flows back to the valve body from the end cover body, so that hydraulic control is realized. In the structure, the balance valve runner is not required to be cast in the end cover body, so that the runner in the end cover body is simplified, the processing cost and the processing precision are reduced, and the end cover body is relatively simple to manufacture. When the hydraulic control of end cover subassembly goes wrong, demolish the connecting piece, can dismantle the balanced valve from the end cover body, directly overhaul the balanced valve, convenient maintenance. When the flow channel in the balance valve is damaged, the balance valve is directly replaced, and the whole end cover assembly is not required to be replaced, so that the maintenance cost is low. Therefore, the technical scheme of the utility model solves the defects of complex structure, high processing difficulty and difficult maintenance of the end cover assembly of the hydraulic motor in the prior art.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 shows a schematic structural view of an embodiment of an end cap assembly of the present utility model;

FIG. 2 illustrates a schematic top view of an end cap body of the end cap assembly of FIG. 1;

FIG. 3 shows a schematic bottom view of the valve body of the end cap assembly of FIG. 1;

fig. 4 shows a schematic view of the internal structure of the valve body of the end cap assembly of fig. 1.

Reference numerals illustrate:

10. an end cap body; 11. a first oil port; 12. a second oil port; 13. a first connection hole; 14. a first oil drain port; 15. the first braking speed regulation oil port; 20. a balancing valve; 21. a valve body; 22. a third oil port; 23. a fourth oil port; 24. a fifth oil port; 25. a sixth oil port; 26. a second connection hole; 27. the second oil drain port; 28. the second braking speed regulation oil port; 30. and a connecting piece.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

As shown in fig. 1 to 4, an embodiment of an end cap assembly according to the present application includes an end cap body 10, a balance valve 20, and a connector 30. Wherein, the end cover body 10 is provided with a first oil port 11 and a second oil port 12. The balance valve 20 includes a valve body 21, the valve body 21 is detachably connected to the head cover body 10, and the valve body 21 and the head cover body 10 are of a split structure. Further, a third oil port 22, a fourth oil port 23, a fifth oil port 24 and a sixth oil port 25 are arranged on the valve body 21, the third oil port 22 is communicated with the first oil port 11, the fourth oil port 23 is communicated with the second oil port 12, one of the fifth oil port 24 and the sixth oil port 25 serves as an oil inlet, and the other one serves as an oil return port. The connector 30 is adapted to connect the valve body 21 to the end cap body 10.

By the technical scheme of the embodiment, the end cover body 10 and the balance valve 20 are arranged to be of a split structure, and are connected through the connecting piece 30. The balance valve 20 performs oil intake and return through the fifth and sixth oil ports 24 and 25, and hydraulic oil enters the end cover body 10 from the valve body 21 through the first and third oil ports 11 and 22 and the second and fourth oil ports 12 and 23 or flows back into the valve body 21 from the end cover body 10, thereby achieving hydraulic control. In the above structure, the balance valve runner is not required to be cast in the end cover body 10, so that the runner in the end cover body 10 is simplified, the processing cost and the processing precision are reduced, and the end cover body 10 is relatively simple to manufacture. When the hydraulic control of the end cover assembly is problematic, the connecting piece 30 is removed, and the balance valve 20 can be detached from the end cover body 10, so that the balance valve 20 is directly overhauled, and the maintenance is convenient. When the flow passage in the balance valve 20 is damaged, the balance valve 20 is directly replaced without replacing the whole end cover assembly, so that the maintenance cost is low. Therefore, the technical scheme of the embodiment solves the defects that the end cover assembly of the hydraulic motor in the prior art is complex in structure, high in processing difficulty and difficult to maintain.

As can be seen from fig. 1, the balance valve 20 is provided on the outer end face of the end cap body 10, both of which are detachably connected. The end cap body 10 and the balance valve 20 are fixedly connected together by the connector 30, and the balance valve 20 can be detached from the end cap body 10 when the connector 30 is detached.

As can be seen from fig. 2 and 3, the end cap body 10 is provided with a first oil port 11 and a second oil port 12, the valve body 21 of the balance valve 20 is provided with a third oil port 22 and a fourth oil port 23, when the balance valve 20 is connected to the end cap body 10, the first oil port 11 and the third oil port 22 are aligned to form a first channel, and the second oil port 12 and the fourth oil port 23 are aligned to form a second channel. Hydraulic oil can flow in the first passage and the second passage, thereby flowing between the valve body 21 and the end cap body 10.

Further, the end cap assembly in the present embodiment is used for controlling the hydraulic motor, so that one of the fifth port 24 and the sixth port 25 on the valve body 21 serves as an oil inlet, and the other serves as an oil return. That is, the working state of the balance valve 20 includes that the fifth oil port 24 is filled with oil and the sixth oil port 25 is filled with oil, or that the sixth oil port 25 is filled with oil and the fifth oil port 24 is filled with oil. Those skilled in the art will appreciate that the fifth port 24 and the sixth port 25 are filled with oil, in fact, to control the forward rotation and reverse rotation of the hydraulic motor.

Further, when the fifth oil port 24 returns oil and the sixth oil port 25 returns oil, hydraulic oil enters the end cover body 10 from the first passage, and flows back into the valve body 21 from the second passage. When the fifth oil port 24 is filled with oil and the sixth oil port 25 is returned, hydraulic oil enters the end cover body 10 from the first passage, and flows back into the valve body 21 from the second passage (i.e., the flow direction of the hydraulic oil is opposite).

As shown in fig. 4, the main parts of the balance valve 20 comprise a balance valve body, a balance valve core, a balance valve spring, a balance valve plug, a one-way valve core, a one-way valve spring, a one-way throttle valve core, a one-way throttle valve spring, a flange seat and other structures which are arranged in the valve body 21. When the hydraulic motor works, hydraulic oil enters the one-way throttle valve from the oil inlet, and pushes the balance valve core to move, so that a medium passes through the inner flow passage of the end cover to release the motor brake, and the motor starts to work and run.

As shown in fig. 1 to 3, in the technical solution of the present embodiment, the end cover body 10 is provided with a first connection hole 13, the valve body 21 is provided with a second connection hole 26, and the connection member 30 includes a connection post, which passes through the first connection hole 13 and the second connection hole 26.

Specifically, when the balance valve 20 and the head cover body 10 are assembled, the balance valve 20 is placed on the outer end surface of the head cover body 10 such that the first oil port 11 and the third oil port 22 are aligned, and the second oil port 12 and the fourth oil port 23 are aligned. The first and second connection holes 13 and 26 are aligned at this time. The connecting posts are then passed through the first and second connecting holes 13 and 26 to secure the valve body 21 to the end cap body 10.

Further, when the cap assembly fails, the coupling studs are removed from the first and second coupling holes 13 and 26, and the valve body 21 can be removed from the cap body 10. When the maintenance is carried out, the valve body 21 is solely overhauled, if the flow passage in the valve body 21 fails, the end cover assembly is not required to be replaced entirely by replacing the new balance valve 20 on the end cover body 10.

Of course, the connector 30 may be a conventional connector such as a buckle, a clip, or the like.

Preferably, the connecting posts are connecting screws.

As shown in fig. 1 to 3, in the technical solution of the present embodiment, the number of first connection holes 13 is plural, the number of second connection holes 26 is plural, and the plurality of first connection holes 13 and the plurality of second connection holes 26 are arranged in one-to-one correspondence. The connecting columns are multiple, and the connecting columns penetrate through the first connecting holes 13 and the second connecting holes 26.

Specifically, the first and second connection holes 13 and 26 in the present embodiment are each provided in six, and the connection posts are correspondingly provided in six. Six connecting posts can firmly fix the valve body 21 to the resource end cover body 10.

Of course, the first connection holes 13, the second connection holes 26, and the connection posts may be provided in other numbers.

As shown in fig. 2 and 3, in the technical solution of the present embodiment, a plurality of first connecting holes 13 and a plurality of second connecting holes 26 are distributed at intervals along the connecting surface of the end cover body 10 and the valve body 21.

Specifically, the connection surface between the end cap body 10 and the valve body 21 is substantially rectangular, and four of the six first connection holes 13 and the second connection holes 26 are distributed at four corners of the rectangle, and the other two are distributed on the long side of the rectangle. So set up for the even atress of junction surface of end cover body 10 and valve body 21 prevents that end cover body 10 and valve body 21 from connecting back one side perk and leading to hydraulic oil to reveal.

As shown in fig. 2 and 3, in the technical solution of the present embodiment, the end cover body 10 is provided with a first oil drain port 14, the valve body 21 is provided with a second oil drain port 27, and the first oil drain port 14 is communicated with the second oil drain port 27.

Specifically, when the valve body 21 is mounted on the end cap body 10, the first drain port 14 and the second drain port 27 are aligned and form a third passage. Hydraulic oil may enter the end cap body 10 from the third passage to have a draining effect on the hydraulic motor (i.e., drain the hydraulic oil in the balance valve 20 into the hydraulic motor housing).

As shown in fig. 2, the end cover body 10 is provided with a first braking speed regulating oil port 15, the valve body 21 is provided with a second braking speed regulating oil port 28, and the first braking speed regulating oil port 15 is communicated with the second braking speed regulating oil port 28.

Specifically, when the valve body 21 is mounted on the end cover body 10, the first and second brake timing oil ports 15 and 28 are aligned and form a fourth passage. Hydraulic oil can enter the end cover body 10 from the fourth channel and control the brake cylinder and the speed changing valve, thereby playing a role in braking and speed changing of the hydraulic motor.

Preferably, sealing rings are arranged between the first oil port 11 and the third oil port 22, between the second oil port 12 and the fourth oil port 23, between the first oil drain port 14 and the second oil drain port 27, and between the first brake speed regulating port 15 and the second brake speed regulating port 28. The seal ring can prevent leakage of hydraulic oil between the end cap body 10 and the valve body 21.

The present application also provides a hydraulic motor, embodiments of which according to the present application include the end cap assembly described above.

The application also provides a construction machine, and an embodiment of the construction machine according to the application comprises the hydraulic motor.

In light of the above, the present patent application has the following advantages:

1. the split end cover assembly can improve the overall processing efficiency compared with an integrated end cover structure;

2. compared with the existing integrated structure, the assembly mode of the split end cover body and the balance valve is more convenient and quicker to install and detach;

3. the end cover assembly of split type structure can simplify the inside runner of end cover body, has promoted the cast qualification rate of end cover and has more had the advantage at processing and processing cost control, lightens end cover weight volume simultaneously, but if end cover body or balanced valve are out of order can change alone, need not all to change, has reduced the cost of maintaining.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.

Claims (10)

1. An end cap assembly, comprising:

the end cover comprises an end cover body (10), wherein a first oil port (11) and a second oil port (12) are formed in the end cover body (10);

the balance valve (20) comprises a valve body (21), wherein the valve body (21) is detachably connected to the end cover body (10), the valve body (21) and the end cover body (10) are of split structures, a third oil port (22), a fourth oil port (23), a fifth oil port (24) and a sixth oil port (25) are arranged on the valve body (21), the third oil port (22) is communicated with the first oil port (11), the fourth oil port (23) is communicated with the second oil port (12), one of the fifth oil port (24) and the sixth oil port (25) serves as an oil inlet, and the other one serves as an oil return port;

-a connector (30) adapted to connect said valve body (21) to said end cap body (10).

2. End cap assembly according to claim 1, wherein the end cap body (10) is provided with a first connection hole (13) and the valve body (21) is provided with a second connection hole (26), and the connection piece (30) comprises a connection post passing through the first connection hole (13) and the second connection hole (26).

3. The end cap assembly of claim 2, wherein the connection post is a connection screw.

4. The end cover assembly according to claim 2, wherein the first connecting holes (13) are multiple, the second connecting holes (26) are multiple, the first connecting holes (13) and the second connecting holes (26) are arranged in a one-to-one correspondence manner, the connecting columns are multiple, and the connecting columns penetrate through the first connecting holes (13) and the second connecting holes (26).

5. End cap assembly according to claim 4, wherein a plurality of said first connecting holes (13) and a plurality of said second connecting holes (26) are spaced along the connecting face of said end cap body (10) with said valve body (21).

6. End cap assembly according to any one of claims 1 to 5, wherein a first oil drain port (14) is provided on the end cap body (10), a second oil drain port (27) is provided on the valve body (21), and the first oil drain port (14) is in communication with the second oil drain port (27).

7. The end cover assembly according to claim 6, wherein a first braking speed regulating oil port (15) is arranged on the end cover body (10), a second braking speed regulating oil port (28) is arranged on the valve body (21), and the first braking speed regulating oil port (15) is communicated with the second braking speed regulating oil port (28).

8. The end cap assembly according to claim 7, wherein sealing rings are provided between the first oil port (11) and the third oil port (22), between the second oil port (12) and the fourth oil port (23), between the first oil drain port (14) and the second oil drain port (27), and between the first brake governor port (15) and the second brake governor port (28).

9. A hydraulic motor comprising an end cap assembly according to any one of claims 1 to 8.

10. A construction machine comprising the hydraulic motor according to claim 9.