CN113982818A

CN113982818A - Cylinder block flow distribution disc assembly and engineering machinery

Info

Publication number: CN113982818A
Application number: CN202111264903.7A
Authority: CN
Inventors: 张启星; 李胜虎; 杨时运
Original assignee: HANGZHOU LILONG HYDRAULIC CO LTD
Current assignee: HANGZHOU LILONG HYDRAULIC CO LTD
Priority date: 2021-10-28
Filing date: 2021-10-28
Publication date: 2022-01-28
Anticipated expiration: 2041-10-28
Also published as: CN113982818B

Abstract

The invention provides a cylinder block flow distribution disc assembly and engineering machinery, wherein the cylinder block flow distribution disc assembly comprises: the valve plate is matched with the end face of the cylinder body; the anti-disengaging structure is arranged between the cylinder body and the valve plate, the first end of the anti-disengaging structure is fixedly connected to one of the cylinder body and the valve plate, and the second end of the anti-disengaging structure is movably connected to the other of the cylinder body and the valve plate. Meanwhile, the second end of the anti-disengaging structure is installed in a floating mode, and assembly and relative rotation between the cylinder body and the valve plate are not hindered. Therefore, the technical scheme of the invention overcomes the defect that the hydraulic motor in the prior art is easy to cause the disc separation between the valve plate and the cylinder body in the use process.

Description

Cylinder block flow distribution disc assembly and engineering machinery

Technical Field

The invention relates to the technical field of power devices, in particular to a cylinder block flow distribution disc assembly and engineering machinery.

Background

A hydraulic motor is a commonly used power device, wherein the hydraulic motor includes a cylinder block and a port plate from which hydraulic oil flows into a piston chamber of the cylinder block. The hydraulic oil pushes the piston to extend and contract and drives the cylinder body to rotate, and the cylinder body rotates to drive the rotating shaft to rotate, so that power is output. The hydraulic motor in the prior art adopts a butterfly spring to be matched with a cylinder body, and the cylinder body is tightly pressed on a valve plate. However, at the moment when the hydraulic motor is started, stopped and reversed, because the load of the output end of the motor is large and the inertia is large, the suction phenomenon can be caused due to the fact that the valve port of the oil inlet of the hydraulic motor is closed due to the reversing. At this moment, can arouse that hydraulic motor's valve plate and cylinder body appear the condition of short-term separating the dish, and the separating dish can lead to hydraulic motor to let out leakage quantity increase in the twinkling of an eye, can lead to the hydraulic motor oil blanket to be exploded by the dashing when serious. In the actual use process of the hydraulic motor, the balance valve is mostly adopted to prevent the hydraulic motor from sliding, the abrasion of the balance valve can influence the opening performance of the hydraulic motor, and the phenomenon of disc separation of a cylinder body and a valve plate of the hydraulic motor can be caused.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the defect that the hydraulic motor in the prior art is easy to cause the disc separation between the valve plate and the cylinder body in the use process, thereby providing the cylinder body valve plate assembly and the engineering machinery.

In order to solve the above problems, the present invention provides a cylinder block flow distribution plate assembly comprising: a cylinder body; the valve plate is matched with the end face of the cylinder body; the anti-disengaging structure is arranged between the cylinder body and the valve plate, the first end of the anti-disengaging structure is fixedly connected to one of the cylinder body and the valve plate, and the second end of the anti-disengaging structure is movably connected to the other of the cylinder body and the valve plate.

Optionally, the anti-disengaging structure comprises a connecting rod, a first end of the connecting rod is fixedly connected to the side wall of the port plate, and a second end of the connecting rod is movably connected to the side wall of the cylinder body.

Optionally, be provided with the spacing groove on the lateral wall of cylinder body, the second end of connecting rod inwards buckles and forms the kink, and the kink stretches into to the spacing inslot, along the axial of cylinder body and radial direction, has between kink and the spacing groove and predetermines the clearance.

Optionally, the predetermined gap is less than 0.1 mm.

Optionally, the limiting groove is an annular groove.

Optionally, the second end of the connecting rod is connected to the port plate by a fastener.

Optionally, a first connecting hole is formed in the valve plate, a second connecting hole is formed in the second end of the connecting rod, and the fastener is a connecting bolt penetrating through the first connecting hole and the second connecting hole.

Optionally, the aperture of the second connection hole is larger than the aperture of the first connection hole.

Optionally, the anti-dropping structure is provided in plurality, and the plurality of anti-dropping structures are arranged at intervals along the circumferential direction of the cylinder body.

The invention also provides an engineering machine, which comprises a hydraulic motor or a hydraulic pump, wherein the hydraulic motor or the hydraulic pump comprises: a housing; the cylinder body flow distribution disc assembly is arranged in the shell and is the cylinder body flow distribution disc assembly; and the end cover is arranged at the end part of the shell, and the valve plate is matched with the end cover.

The invention has the following advantages:

by utilizing the technical scheme of the invention, when the hydraulic motor works and the cylinder body and the port plate have the tendency of separation, the anti-separation structure can prevent the port plate and the cylinder body from separating from each other. Meanwhile, the second end of the anti-disengaging structure is installed in a floating mode, and assembly and relative rotation between the cylinder body and the valve plate are not hindered. Therefore, the technical scheme of the invention overcomes the defect that the hydraulic motor in the prior art is easy to cause the disc separation between the valve plate and the cylinder body in the use process.

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, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 shows a schematic block diagram of the cylinder port plate assembly of the present invention;

FIG. 2 shows an enlarged schematic view at A in FIG. 1;

FIG. 3 shows a schematic front view of the cylinder port plate assembly of FIG. 1;

FIG. 4 shows an enlarged schematic view at B in FIG. 3;

FIG. 5 shows a schematic cross-sectional view of the cylinder port plate of FIG. 1; and

fig. 6 shows an enlarged schematic view at C in fig. 5.

Description of reference numerals:

10. a cylinder body; 11. a limiting groove; 20. a valve plate; 21. a first connection hole; 30. an anti-falling structure; 31. a bending section; 32. a second connection hole; 40. a fastener.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present 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.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. 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 invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As shown in fig. 1, the cylinder port plate assembly of the present embodiment includes a cylinder 10, a port plate 20, and a retaining structure 30. Wherein the port plate 20 is engaged with an end surface of the cylinder 10. The anti-dropping structure 30 is arranged between the cylinder body 10 and the port plate 20, a first end of the anti-dropping structure 30 is fixedly connected to one of the cylinder body 10 and the port plate 20, and a second end of the anti-dropping structure 30 is movably connected to the other of the cylinder body 10 and the port plate 20.

With the technical solution of the present embodiment, when the hydraulic motor is in operation, the cylinder body 10 and the port plate 20 tend to separate, the anti-separation structure 30 can prevent the port plate 20 and the cylinder body 10 from separating. Meanwhile, the second end of the anti-slip structure 30 is movably installed, so that the assembly between the cylinder body 10 and the port plate 20 is not hindered, and the relative rotation between the cylinder body 10 and the port plate 20 is not hindered. Therefore, the technical scheme of the embodiment overcomes the defect that the hydraulic motor in the prior art is easy to cause the disc separation of the port plate and the cylinder body in the use process.

It should be noted that the above-mentioned "movably connected" means that the second end of the anti-dropping structure 30 is not connected to the cylinder 10 or the port plate 20 in a completely fixed position, that is, the anti-dropping structure 30 can shake for a small distance with respect to the cylinder 10 or the port plate 20, so that the anti-dropping structure 30 does not obstruct the assembly and relative rotation of the cylinder 10 and the port plate 20.

As shown in fig. 1 and 2, in the solution of the present embodiment, the anti-dropping structure 30 includes a connecting rod. The first end of the connecting rod is fixedly connected to the side wall of the port plate 20, and the second end of the connecting rod is movably connected to the side wall of the cylinder body 10. Specifically, the lower end of the connecting rod is fixed on the side wall of the port plate 20, and the upper end of the connecting rod is movably connected on the side wall of the cylinder 10. When the cylinder body 10 has the tendency to be separated from the port plate 20, the connecting rod can play a role of restraint, so that the cylinder body 10 can be prevented from separating from the port plate 20.

Of course, in some embodiments, not shown, the connection of the first end and the second end of the anti-slip structure 30 may be reversed. That is, the first end of the connecting rod may be movably connected to the sidewall of the port plate 20, and the second end of the connecting rod may be fixedly connected to the sidewall of the cylinder body 10.

As shown in fig. 3 to 6, in the technical solution of the present embodiment, a limiting groove 11 is disposed on a side wall of the cylinder body 10, the second end of the connecting rod is bent inward to form a bent portion 31, and the bent portion 31 extends into the limiting groove 11. And a predetermined gap is provided between the bent portion 31 and the stopper groove 11 in the axial direction of the cylinder block 10. Specifically, the second end of the connecting rod is bent inward to form an "L" shape, and the bent portion 31 is a 90 ° bent structure. The bending part 31 extends into the limiting groove 11, so that when the cylinder body 10 has a tendency of separating from the port plate 20, the bending part 31 is in abutting contact with the upper and lower side walls of the limiting groove 11, and then the effect of limiting the cylinder body 10 is achieved, so that the cylinder body 10 is prevented from being separated from the port plate 20.

Of course, the movable connection between the cylinder 10 and the second end of the connecting rod can be realized in other manners, for example, a protrusion can be disposed on the sidewall of the cylinder 10, a recess can be disposed on the second end of the connecting rod, and the protrusion can be disposed in the recess, so as to realize the above-mentioned movable connection effect.

Further, there is a predetermined gap between the upper and lower surfaces of the bent portion 31 and the upper and lower sidewalls of the stopper groove 11, so that a small distance displacement may occur between the cylinder body 10 and the port plate 20 in the axial direction, thereby not hindering the normal rotation of the cylinder body 10 and the port plate 20.

Preferably, the predetermined gap is less than 0.1 mm. The specific size of the preset gap can be adaptively selected by those skilled in the art according to the actual structural requirements.

Preferably, the limiting groove 11 is an annular groove. The annular groove does not hinder relative rotation between the cylinder 10 relative to the port plate 20, i.e., the bent portion 31 can slide circumferentially within the annular groove when the cylinder 10 rotates. Meanwhile, the preset gap can prevent the cylinder body 10 and the port plate 20 from being stuck together.

Those skilled in the art will appreciate that the cylinder plate assembly of the present embodiment may be applied to hydraulic motors, which are classified into a swash plate hydraulic motor and a swash plate hydraulic motor, and a hydraulic pump. Since the port plate of the inclined shaft hydraulic motor has a non-circular structure, when the cylinder block port plate assembly of the present embodiment is applied to an inclined shaft hydraulic motor or a hydraulic pump, the limiting groove 11 needs to be provided on the cylinder block 10. When the cylinder block port plate of the present embodiment is applied to a swash plate hydraulic motor or a hydraulic pump, the stopper groove 11 may be provided on the cylinder block 10, or the stopper groove 11 may be provided on the port plate 20.

As shown in fig. 3 to 6, in the solution of the present embodiment, the second end of the connecting rod is connected to the port plate 20 by a fastener 40. Specifically, the second end of the connecting rod is fixedly attached to port plate 20 by fastener 40. During assembly, the first end of the connecting rod is inserted into the limiting groove 11, and then the connecting rod is fixedly mounted on the valve plate 20 through the fastener 40.

Of course, the second end of the connecting rod may be fixedly connected to the port plate 20 by other means, for example, the second end of the connecting rod is connected to the port plate 20 by welding or integral molding.

As shown in fig. 3 to 6, the port plate 20 is provided with a first connecting hole 21, the second end of the connecting rod is provided with a second connecting hole 32, and the fastening member 40 is a connecting bolt inserted into the first connecting hole 21 and the second connecting hole 32. The connecting bolt can firmly mount the second end of the connecting rod on the port plate 20.

Preferably, the second connection hole 32 has a larger aperture than the first connection hole 21. Specifically, at the time of assembly, by adjusting the eccentric amounts of the first and second connection holes 21 and 32, the axial gap between the bent portion 31 and the stopper groove 11 can be adjusted.

As shown in fig. 1, 3 and 5, in the present embodiment, the retaining structure 30 is provided in plurality, and the plurality of retaining structures 30 are provided at intervals in the circumferential direction of the cylinder 10. Specifically, the plurality of retaining structures 30 can prevent the cylinder block 10 from being separated from the port plate 20 in the entire circumferential direction. Accordingly, the number of the first connection holes 21 is adapted to the separation prevention structure 30. The specific number of anti-slip structures 30 can be adaptively adjusted by those skilled in the art according to actual working requirements.

The embodiment also provides the engineering machinery which comprises the hydraulic motor or the hydraulic pump. The hydraulic motor or the hydraulic pump comprises a shell, a cylinder body flow distribution plate assembly and an end cover. Specifically, the cylinder valve plate assembly is the cylinder valve plate assembly, and the cylinder valve plate assembly is arranged in the shell, and the valve plate is matched with the end cover.

According to the above description, the present patent application has the following advantages:

1. the hydraulic motor can restrict the movement of the cylinder body by adopting a mode of installing a pull rod by a threaded hole on the valve plate;

2. when the hydraulic motor normally operates, a gap exists between the cylinder body and the connecting rod in the vertical direction, so that the cylinder body is not contacted, and the cylinder body is pulled to prevent the cylinder body from being separated from the valve plate when the trend of turning the valve plate is about to occur.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. A cylinder block port plate assembly, comprising:

a cylinder body (10);

the valve plate (20) is matched with the end face of the cylinder body (10);

the anti-dropping structure (30) is arranged between the cylinder body (10) and the valve plate (20), the first end of the anti-dropping structure (30) is fixedly connected to one of the cylinder body (10) and the valve plate (20), and the second end of the anti-dropping structure (30) is movably connected to the other of the cylinder body (10) and the valve plate (20).

2. The cylinder port plate assembly of claim 1, wherein the anti-slip structure (30) comprises a connecting rod, a first end of the connecting rod is fixedly connected to the side wall of the port plate (20), and a second end of the connecting rod is movably connected to the side wall of the cylinder (10).

3. A cylinder block valve plate assembly according to claim 2, wherein the side wall of the cylinder block (10) is provided with a limiting groove (11), the second end of the connecting rod is bent inward to form a bent portion (31), the bent portion (31) extends into the limiting groove (11), and a predetermined gap is formed between the bent portion (31) and the limiting groove (11) along the axial and radial directions of the cylinder block (10).

4. A cylinder valve plate assembly according to claim 3 wherein said predetermined clearance is less than 0.1 mm.

5. A cylinder block plate assembly according to claim 3, wherein the limiting groove (11) is an annular groove.

6. Cylinder port plate assembly according to any of claims 2 to 5, characterized in that the second end of the connecting rod is connected to the port plate (20) by means of a fastener (40).

7. The cylinder block port plate assembly of claim 6, wherein the port plate (20) is provided with a first connection hole (21), the second end of the connection rod is provided with a second connection hole (32), and the fastening member (40) is a connection bolt inserted into the first connection hole (21) and the second connection hole (32).

8. The cylinder block valve plate assembly of claim 7, wherein the second connection hole (32) has a larger bore diameter than the first connection hole (21).

9. The cylinder head assembly of claim 1, wherein the retaining structure (30) is plural, and the retaining structure (30) is provided at intervals in the circumferential direction of the cylinder (10).

10. A working machine, comprising a hydraulic motor or pump, said hydraulic motor or pump comprising:

a housing;

a cylinder port plate assembly disposed within the housing, the cylinder port plate assembly being as claimed in any one of claims 1 to 9;

the end cover is arranged at the end part of the shell, and the valve plate (20) is matched with the end cover.