CN113982818B

CN113982818B - Cylinder body valve plate assembly and engineering machinery

Info

Publication number: CN113982818B
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: 2023-06-09
Anticipated expiration: 2041-10-28
Also published as: CN113982818A

Abstract

The invention provides a cylinder block valve plate assembly and engineering machinery, wherein the cylinder block valve plate assembly comprises: a valve plate matched with the end face of the cylinder body; the anti-drop structure is arranged between the cylinder body and the valve plate, the first end of the anti-drop structure is fixedly connected to one of the cylinder body and the valve plate, and the second end of the anti-drop structure is movably connected to the other of the cylinder body and the valve plate. Meanwhile, the second end of the anti-drop structure is arranged 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 solves the defect that the hydraulic motor in the prior art is easy to cause disjunction of the valve plate and the cylinder body in the use process.

Description

Cylinder body valve plate assembly and engineering machinery

Technical Field

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

Background

Hydraulic motors are common power devices in which the hydraulic motor includes a cylinder and a port plate from which hydraulic oil flows into a piston chamber of the cylinder. The hydraulic oil pushes the piston to stretch and retract and drives the cylinder to rotate, and the cylinder 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 the cylinder body and tightly presses the cylinder body on the valve plate. However, at the moment of starting, stopping and reversing of the hydraulic motor, the suction phenomenon can occur due to the fact that the load and inertia of the output end of the motor are large and the valve port of the oil inlet of the hydraulic motor is closed due to reversing. At this time, the situation that the valve plate and the cylinder body of the hydraulic motor are subjected to short-time disc removal can be caused, the leakage amount of the hydraulic motor can be increased instantaneously due to disc removal, and the oil seal of the hydraulic motor can be exploded seriously. In addition, in the actual use process of the hydraulic motor, a balance valve is mostly adopted to prevent the hydraulic motor from slipping, the abrasion of the balance valve can influence the opening performance of the balance valve, and the phenomenon of disc stripping 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 disjunction of 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 port plate assembly, comprising: a cylinder; a valve plate matched with the end face of the cylinder body; the anti-drop structure is arranged between the cylinder body and the valve plate, the first end of the anti-drop structure is fixedly connected to one of the cylinder body and the valve plate, and the second end of the anti-drop structure is movably connected to the other of the cylinder body and the valve plate.

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

Optionally, a limiting groove is formed in the side wall of the cylinder body, the second end of the connecting rod is bent inwards to form a bending part, the bending part stretches into the limiting groove, and a preset gap is formed between the bending part and the limiting groove in the axial direction and the radial direction of the cylinder body.

Optionally, the preset gap is less than 0.1 mm.

Optionally, the limit groove is an annular groove.

Optionally, the second end of the connecting rod is attached 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-disengaging structure is a plurality of, and a plurality of anti-disengaging structures are arranged along the circumference interval of cylinder body.

The invention also provides an engineering machine comprising a hydraulic motor or a hydraulic pump, the hydraulic motor or the hydraulic pump comprising: a housing; the cylinder body valve plate assembly is arranged in the shell and is the cylinder body valve plate 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 valve plate have a tendency of disengaging, the anti-disengaging structure can prevent the valve plate and the cylinder body from disengaging. Meanwhile, the second end of the anti-drop structure is arranged 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 solves the defect that the hydraulic motor in the prior art is easy to cause disjunction of 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 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 invention, 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 a 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.

Reference numerals illustrate:

10. a cylinder; 11. a limit groove; 20. a port plate; 21. a first connection hole; 30. an anti-falling structure; 31. a bending part; 32. a second connection hole; 40. a fastener.

Detailed Description

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

In the description of the present invention, 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 invention 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 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 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 invention 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 invention described below may be combined with each other as long as they do not collide 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 drop prevention structure 30. Wherein the port plate 20 is fitted to the end face of the cylinder 10. The anti-drop structure 30 is disposed between the cylinder 10 and the valve plate 20, a first end of the anti-drop structure 30 is fixedly connected to one of the cylinder 10 and the valve plate 20, and a second end of the anti-drop structure 30 is movably connected to the other of the cylinder 10 and the valve plate 20.

With the technical solution of this embodiment, when the hydraulic motor is working and the cylinder 10 and the valve plate 20 have a tendency to separate, the anti-drop structure 30 can prevent the valve plate 20 and the cylinder 10 from being separated. At the same time, the second end of the anti-drop structure 30 is movably mounted without impeding the assembly between the cylinder 10 and the port plate 20 and without impeding the relative rotation between the cylinder 10 and the port plate 20. Therefore, the technical scheme of the embodiment solves the defect that the hydraulic motor in the prior art is easy to cause disjunction of the valve 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-disengaging structure 30 is not completely fixedly connected to the cylinder 10 or the valve plate 20, that is, the anti-disengaging structure 30 can shake a small distance relative to the cylinder 10 or the valve plate 20, so that the anti-disengaging structure 30 does not hinder the assembly and the relative rotation of the cylinder 10 and the valve plate 20.

As shown in fig. 1 and 2, in the technical solution of the present embodiment, the anti-falling 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 body 10. When the cylinder 10 has a tendency to disengage from the port plate 20, the connecting rod can act as a constraint, thereby preventing the cylinder 10 from becoming dislodged from the port plate 20.

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

As shown in fig. 3 to 6, in the technical solution of the present embodiment, a limiting groove 11 is provided on a side wall of the cylinder 10, and a second end of the connecting rod is bent inwards to form a bending portion 31, and the bending portion 31 extends into the limiting groove 11. And a preset gap is provided between the bent portion 31 and the limit groove 11 in the axial direction of the cylinder 10. Specifically, the second end of the connecting rod is bent inward to form an "L" structure, and the bending portion 31 has a bending structure of 90 °. The bending part 31 extends into the limiting groove 11, so that when the cylinder body 10 has a tendency of separating and separating from the valve plate 20, the bending part 31 is in contact with the upper side wall and the lower side wall of the limiting groove 11, and further plays a role in limiting the cylinder body 10, so that the cylinder body 10 is prevented from separating from the valve plate 20.

Of course, other manners of realizing the movable connection between the cylinder 10 and the second end of the connecting rod may be adopted, for example, a protrusion may be provided on a side wall of the cylinder 10, a recess may be provided at the second end of the connecting rod, and the protrusion may be disposed in the recess, so that the above-mentioned movable connection effect may be realized.

Further, a predetermined gap exists between the upper and lower surfaces of the bent portion 31 and the upper and lower side walls of the limit groove 11, so that a displacement of a small distance can occur between the cylinder 10 and the valve plate 20 in the axial direction, so that normal rotation of the cylinder 10 and the valve plate 20 is not hindered.

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

Preferably, the limiting groove 11 is an annular groove. The annular groove does not hinder the relative rotation between the cylinder 10 and the port plate 20, i.e. the bending portion 31 can slide circumferentially in the annular groove when the cylinder 10 rotates. Meanwhile, the preset gap can also prevent clamping stagnation between the cylinder body 10 and the valve plate 20.

It will be appreciated by those skilled in the art that the cylinder port plate assembly of the present embodiment may be employed in hydraulic motors and hydraulic pumps, and that the hydraulic motors are divided into swash plate hydraulic motors and inclined shaft hydraulic motors. Since the port plate of the diagonal-axis hydraulic motor has a non-circular structure, when the cylinder port plate assembly of the present embodiment is applied to the diagonal-axis hydraulic motor or the hydraulic pump, it is necessary to provide the limit groove 11 on the cylinder 10. When the cylinder port plate of the present embodiment is applied to a swash plate hydraulic motor or a hydraulic pump, the limit groove 11 may be provided on the cylinder 10, or the limit groove 11 may be provided on the port plate 20.

As shown in fig. 3 to 6, in the technical 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 the port plate 20 by fasteners 40. When the assembly is specifically performed, the first end of the connecting rod is first inserted into the limit 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 attached to the port plate 20 by other means, such as welding, integrally forming the second end of the connecting rod to the port plate 20.

As shown in fig. 3 to 6, the valve plate 20 is provided with a first coupling hole 21, the second end of the connecting rod is provided with a second coupling hole 32, and the fastener 40 is a coupling bolt penetrating through the first coupling hole 21 and the second coupling 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, when assembling is performed, the axial gap between the bent portion 31 and the limit groove 11 can be adjusted by adjusting the eccentric amounts of the first and second connection holes 21 and 32.

As shown in fig. 1, 3 and 5, in the technical solution of the present embodiment, a plurality of anti-falling structures 30 are provided, and the plurality of anti-falling structures 30 are disposed at intervals along the circumferential direction of the cylinder 10. Specifically, the plurality of drop preventing structures 30 can prevent the cylinder 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 anti-drop structure 30. The specific number of anti-slip structures 30 can be adapted by those skilled in the art according to the actual working requirements.

The embodiment also provides a construction machine comprising the hydraulic motor or the hydraulic pump. Wherein the hydraulic motor or pump includes a housing, a cylinder port plate assembly, and an end cap. Specifically, the cylinder port plate assembly is the cylinder port plate assembly, and the cylinder port plate assembly is arranged in the shell, and the port 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 that a threaded hole is formed in the valve plate to install a pull rod;

2. when the hydraulic motor normally runs, a gap is formed between the cylinder body and the connecting rod in the vertical direction, the cylinder body can not contact with the connecting rod, and when the tendency of the turn-over disk is about to occur, the cylinder body is pulled to prevent the cylinder body from being separated from the valve plate.

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 invention.

Claims

1. A cylinder port plate assembly comprising:

a cylinder (10);

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

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

the anti-drop structure (30) comprises a connecting rod, a first end of the connecting rod is fixedly connected to the side wall of the valve plate (20), and a second end of the connecting rod is movably connected to the side wall of the cylinder body (10);

be provided with spacing groove (11) on the lateral wall of cylinder body (10), the second end of connecting rod is inwards buckled and is formed kink (31), kink (31) stretch into in spacing groove (11), in follow in the axial and the radial direction of cylinder body (10), kink (31) with have the clearance of predetermineeing between spacing groove (11).

2. The cylinder port plate assembly of claim 1, wherein the predetermined gap is less than 0.1 millimeters.

3. Cylinder port plate assembly according to claim 1, characterized in that the limit groove (11) is an annular groove.

4. A cylinder port plate assembly according to any one of claims 1 to 3, characterized in that the second end of the connecting rod is connected to the port plate (20) by means of a fastener (40).

5. The cylinder port plate assembly according to claim 4, characterized in that a first connecting hole (21) is provided in the port plate (20), a second connecting hole (32) is provided in the second end of the connecting rod, and the fastener (40) is a connecting bolt penetrating through the first connecting hole (21) and the second connecting hole (32).

6. The cylinder port plate assembly according to claim 5, characterized in that the second connecting hole (32) has a larger pore size than the first connecting hole (21).

7. The cylinder port plate assembly according to claim 1, wherein the plurality of the anti-drop structures (30) are provided in plural, the plurality of the anti-drop structures (30) being disposed at intervals along the circumferential direction of the cylinder (10).

8. A work machine comprising a hydraulic motor or pump, the hydraulic motor or pump comprising:

a housing;

a cylinder port plate assembly disposed within the housing, the cylinder port plate assembly being a cylinder port plate assembly as defined in any one of claims 1 to 7;

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