CN210890228U

CN210890228U - Reversing valve and excavator

Info

Publication number: CN210890228U
Application number: CN201922059949.XU
Authority: CN
Inventors: 王潇
Original assignee: Shanghai Sany Heavy Machinery Co Ltd
Current assignee: Shanghai Sany Heavy Machinery Co Ltd
Priority date: 2019-11-25
Filing date: 2019-11-25
Publication date: 2020-06-30
Anticipated expiration: 2029-11-25

Abstract

A reversing valve and an excavator comprise a connecting shaft, a first flow guide block, a rotating block and a second flow guide block, wherein the first flow guide block and the second flow guide block are respectively fixedly connected with the connecting shaft, the rotating block is rotatably connected with the connecting shaft, four first flow guide channels, four conduction channels and four second flow guide channels are respectively and uniformly distributed on the first flow guide block, the rotating block and the second flow guide block along the respective circumferential directions of the first flow guide block, the four conduction channels and the four second flow guide channels, the first flow guide channels, the conduction channels and the second flow guide channels can be correspondingly communicated one by one, a first arc-shaped groove is arranged on one side of the first flow guide block facing the rotating block, one end of the first arc-shaped groove is communicated with the second flow guide channels, and one end of the first arc-shaped groove far away from the first flow guide channels is overlapped with one end of the second arc-shaped groove far away from the second flow guide channels, the turning block is turned to make the conducting channel and the first and second flow guiding channels conducting or stopping.

Description

Reversing valve and excavator

Technical Field

The utility model relates to the technical field of valves, particularly, relate to a switching-over valve and excavator.

Background

The hydraulic excavator is operated by two handles, and the front direction, the rear direction, the left direction and the right direction of the two handles respectively control the rotation of a movable arm, an arm, a bucket and an upper part body of the excavator. The operation modes of the excavator are divided into two types, "front and rear rotation" and "left and right rotation" according to the difference in the corresponding manner. The front-back rotation means that the front, the back, the left and the right of the left handle respectively control the right rotation, the left rotation, the bucket rod extension and the bucket rod recovery of the excavator. The left-right rotation refers to that the front, the back, the left and the right of the left handle respectively and correspondingly control the extension of the bucket rod, the recovery of the bucket rod, the left rotation and the right rotation of the bucket rod of the excavator.

When the operation habit of the driver does not match the operation mode of the excavator, the operation mode of the excavator is generally changed by the following methods: first, rotating the handle: the screw of the left-hand handle is manually removed, and the bullet head and the rubber tube are rotated by 90 degrees together and then assembled. The method has the disadvantages of being troublesome, narrow in space during rotation and inconvenient because the rubber tube is made of hard material. Secondly, changing a pipeline: generally, at the position of a rubber hose connecting block in a side door behind a cab, one end of small rubber hoses is connected to a handle bullet, and the other end of the small rubber hoses is connected to a multi-way valve. The method needs to know the action of controlling each rubber pipe to be correspondingly changed, and the position of each brand excavator is different, so that the method is inconvenient. Thirdly, rotating the reversing valve: the excavator is provided with the reversing valve for switching the operation mode, and the reversing valve only needs to be rotated at the moment, so that the mode is the simplest and most adopted method at present. However, when the reversing valve in the prior art is installed on an excavator, the installation height of the reversing valve is high, and the installation of the rubber pipe needs four-direction spaces, which is not favorable for the layout of pipeline space.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a switching-over valve and excavator can install the rubber tube to same orientation on, more do benefit to the overall arrangement in pipeline space.

The embodiment of the utility model is realized like this:

in one aspect of the embodiment of the present invention, a reversing valve is provided, which comprises a connecting shaft, and a first flow guiding block, a rotating block and a second flow guiding block sleeved on the connecting shaft in sequence, wherein the first flow guiding block and the second flow guiding block are fixedly connected to the connecting shaft respectively, the rotating block is rotatably connected to the connecting shaft, four first flow guiding channels are uniformly distributed on the first flow guiding block along a circumferential direction, four conducting channels are uniformly distributed on the rotating block along the circumferential direction, four second flow guiding channels are uniformly distributed on the second flow guiding block along the circumferential direction, the first flow guiding channels, the conducting channels and the second flow guiding channels can be communicated in one-to-one correspondence, a first arc-shaped groove is arranged on one side of the first flow guiding block facing the rotating block from the first flow guiding channel along the first direction, one end of the first arc-shaped groove is communicated with the first flow guiding channels, one side of the second flow guide block, which faces the rotating block, is provided with a second arc-shaped groove along a second direction from the second flow guide channel, one end of the second arc-shaped groove is communicated with the second flow guide channel, the first direction is opposite to the second direction, one end of the first arc-shaped groove, which is far away from the first flow guide channel, is overlapped with one end of the second arc-shaped groove, which is far away from the second flow guide channel, and the rotating block is rotated to enable the conduction channel to be conducted or cut off with the first flow guide channel and the second flow guide channel. The reversing valve can install the rubber tube to the same direction, and is more beneficial to the layout of pipeline space.

Optionally, in a preferred embodiment of the present invention, a sum of a central angle of the first arc-shaped groove and a central angle of the second arc-shaped groove is 90 °.

Optionally, in a preferred embodiment of the present invention, the central angle of the first arc-shaped groove and the central angle of the second arc-shaped groove are both 45 °.

Optionally, in a preferred embodiment of the present invention, the first guiding block and the rotating block and the second guiding block and the rotating block are respectively engaged in a spherical surface.

Optionally, in a preferred embodiment of the present invention, the side of the first diversion block facing the rotation block and the side of the second diversion block facing the rotation block are both concave structures, and the side of the rotation block facing the first diversion block and the side of the rotation block facing the second diversion block are both convex structures matching with the concave structures;

or, first water conservancy diversion piece orientation the side of turning block and second water conservancy diversion piece orientation the side of turning block all is the convex surface structure, the turning block orientation the side of first water conservancy diversion piece and the turning block orientation the side of second water conservancy diversion piece all be with convex surface structure complex concave surface structure.

Optionally, in the preferred embodiment of the present invention, the first transition block and the second transition block are sleeved on the connecting shaft, the first transition block and the second transition block are respectively connected to the connecting shaft fixedly, the first transition block is disposed on the first diversion block, the first diversion block is disposed on one side of the rotating block, the second transition block is disposed on the second diversion block, the one side of the rotating block is disposed on the second diversion block, four third diversion channels are uniformly distributed on the first transition block along the circumferential direction, four fourth diversion channels are uniformly distributed on the second transition block along the circumferential direction, and the third diversion channels and the fourth diversion channels can sequentially pass through the first diversion channels, the conduction channels and the one-to-one communication of the second diversion channels.

Optionally, in the preferred embodiment of the present invention, the first transition block, the first diversion block, the rotation block, the second diversion block, and the second transition block are provided with a housing, and the first transition block is far away from one end of the first diversion block and the second transition block is far away from one end of the second diversion block, the first transition block and the second transition block are respectively fixedly connected to the housing.

Optionally, in a preferred embodiment of the present invention, the rotating assembly further includes a through groove formed on the housing corresponding to the rotating block, the rotating assembly extends into the housing through the through groove and is fixedly connected to the rotating block, and the rotating assembly moves along the through groove, so that the rotating block rotates relative to the connecting shaft.

Optionally, in the preferred embodiment of the present invention, the cross section of the through groove is of a "convex" structure, the rotating component includes a first rotating rod, a second rotating rod and a spring which are fixedly connected in sequence, the spring is fixedly connected to the rotating block, the diameter of the first rotating rod is smaller than that of the second rotating rod, and the second rotating rod is close to the end surface of the first rotating rod and can be abutted against the table surface of the "convex" structure.

The embodiment of the utility model provides a further aspect provides an excavator, including foretell switching-over valve. The reversing valve can install the rubber tube to the same direction, and is more beneficial to the layout of pipeline space.

The utility model discloses beneficial effect includes:

the reversing valve comprises a connecting shaft, and a first flow guide block, a rotating block and a second flow guide block which are sequentially sleeved on the connecting shaft, wherein the first flow guide block and the second flow guide block are respectively and fixedly connected with the connecting shaft, and the rotating block is rotatably connected with the connecting shaft, so that the rotating block can rotate around the connecting shaft relative to the first flow guide block and the second flow guide block. Four first diversion channels are uniformly distributed on the first diversion block along the circumferential direction, four conduction channels are uniformly distributed on the rotating block along the circumferential direction, four second diversion channels are uniformly distributed on the second diversion block along the circumferential direction, and the first diversion channels, the conduction channels and the second diversion channels can be communicated in a one-to-one correspondence manner. The first guide channel and the second guide channel are used for installing and fixing the rubber tube respectively, and the first guide block, the rotating block and the second guide block are sleeved on the connecting shaft, so that the first guide channel, the conducting channel and the second guide channel extend along the axial direction of the connecting shaft. Therefore, the rubber tube can be installed in the same direction, and the layout of pipeline space is facilitated. Meanwhile, in order to realize the switching of the operation modes of the excavator through the reversing valve, a first arc-shaped groove is formed in one side, facing the rotating block, of the first flow guide block from the first flow guide channel in the first direction, one end of the first arc-shaped groove is communicated with the first flow guide channel, a second arc-shaped groove is formed in one side, facing the rotating block, of the second flow guide block from the second flow guide channel in the second direction, one end of the second arc-shaped groove is communicated with the second flow guide channel, the first direction is opposite to the second direction, one end, away from the first flow guide channel, of the first arc-shaped groove and one end, away from the second flow guide channel, of the second arc-shaped groove are arranged in an overlapped mode, and the rotating block can enable the conduction channel to be conducted or cut off with the first flow guide channel.

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 reversing valve according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a second flow guiding block provided in an embodiment of the present invention;

fig. 3 is a second schematic structural diagram of a reversing valve according to an embodiment of the present invention;

fig. 4 is a third schematic structural diagram of a reversing valve according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a housing and a rotating assembly according to an embodiment of the present invention.

Icon: 100-a reversing valve; 10-a connecting shaft; 20-a first flow guide block; 21. 21A, 21B, 21C, 21D-a first flow guide channel; 211-a first arc-shaped slot; 30-a turning block; 31. 31A, 31B, 31C, 31D-conducting channels; 40-a second flow guide block; 41. 41A, 41B, 41C, 41D-a second flow guide channel; 411-a second arc-shaped slot; 60-a first transition block; 61-a third flow guide channel; 70-a second transition block; 71-a fourth flow guide channel; 80-a housing; 81-through groove; 90-a rotating assembly; 91-a first turning lever; 92-a second rotatable shaft; 93-a spring; 94-push buttons.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as 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 accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to 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 the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "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; either directly or indirectly through intervening media, or may be internal to both elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Examples

Referring to fig. 1 and 2, the present embodiment provides a reversing valve 100, including a connecting shaft 10, and a first flow guiding block 20, a rotating block 30, and a second flow guiding block 40 sequentially sleeved on the connecting shaft 10, wherein the first flow guiding block 20 and the second flow guiding block 40 are respectively fixedly connected to the connecting shaft 10, the rotating block 30 is rotatably connected to the connecting shaft 10, four first flow guiding channels 21 are uniformly distributed on the first flow guiding block 20 along a circumferential direction, four conducting channels 31 are uniformly distributed on the rotating block 30 along the circumferential direction, four second flow guiding channels 41 are uniformly distributed on the second flow guiding block 40 along the circumferential direction, the first flow guiding channels 21, the conducting channels 31, and the second flow guiding channels 41 can be in one-to-one correspondence, a first arc-shaped groove 211 is formed on one side of the first flow guiding block 20 facing the rotating block 30 from the first flow guiding channel 21 along the first direction, one end of the first arc-shaped groove 211 is communicated with the first flow guiding channel 21, a second arc-shaped groove 411 is formed in one side, facing the rotating block 30, of the second guide block 40 along the second direction from the second guide channel 41, one end of the second arc-shaped groove 411 is communicated with the second guide channel 41, the first direction is opposite to the second direction, one end, away from the first guide channel 21, of the first arc-shaped groove 211 and one end, away from the second guide channel 41, of the second arc-shaped groove 411 are arranged in an overlapping mode, and the rotating block 30 is rotated to enable the conduction channel 31 to be conducted or cut off with the first guide channel 21 and the second guide channel 41.

It should be noted that, first, four first flow guide channels 21, namely, a first flow guide channel 21A, a first flow guide channel 21B, a first flow guide channel 21C, and a first flow guide channel 21D, are uniformly distributed on the first flow guide block 20 along the circumferential direction, four conduction channels 31, namely, a conduction channel 31A, a conduction channel 31B, a conduction channel 31C, and a conduction channel 31D, are uniformly distributed on the rotation block 30 along the circumferential direction, four second flow guide channels 41, namely, a second flow guide channel 41A, a second flow guide channel 41B, a second flow guide channel 41C, and a second flow guide channel 41D are uniformly distributed on the second flow guide block 40 along the circumferential direction, and the first flow guide channels 21, the conduction channels 31, and the second flow guide channels 41 can be communicated in one-to-one correspondence, namely, the first flow guide channels 21A, the conduction channels 31A, and the second flow guide channels 41A can be communicated in one-to-one correspondence, and the first flow guide, The conducting channel 31B and the second flow guide channel 41B can be communicated in a one-to-one correspondence manner, the first flow guide channel 21C, the conducting channel 31C and the second flow guide channel 41C can be communicated in a one-to-one correspondence manner, and the first flow guide channel 21D, the conducting channel 31D and the second flow guide channel 41D can be communicated in a one-to-one correspondence manner.

Secondly, for convenience of description and understanding, it is assumed that a state in which the first diversion channel 21A, the conducting channel 31A and the second diversion channel 41A are in one-to-one communication is a first operation mode of the excavator, and a state in which the first diversion channel 21B, the conducting channel 31A and the second diversion channel 41B are in one-to-one communication is a second operation mode of the excavator, and at this time, the first diversion channel 21 and the second diversion channel 41 can be conducted through the conducting channel 31. When the operation mode is one, the first flow guide channel 21B, the conducting channel 31B and the second flow guide channel 41B are also in one-to-one correspondence communication, the first flow guide channel 21C, the conducting channel 31C and the second flow guide channel 41C are also in one-to-one correspondence communication, and the first flow guide channel 21D, the conducting channel 31D and the second flow guide channel 41D are also in one-to-one correspondence communication. When the operation mode is the second operation mode, the first flow guide channel 21C, the conducting channel 31B and the second flow guide channel 41C are also communicated in a one-to-one correspondence manner, the first flow guide channel 21D, the conducting channel 31C and the second flow guide channel 41D are also communicated in a one-to-one correspondence manner, and the first flow guide channel 21A, the conducting channel 31D and the second flow guide channel 41A are also communicated in a one-to-one correspondence manner.

Third, in this embodiment, the first direction is clockwise, and the second direction is counterclockwise. Of course, in other embodiments, the first direction may also be a counterclockwise direction, and in this case, the second direction is a clockwise direction.

As described above, the reversing valve 100 includes the connecting shaft 10, and the first guide block 20, the rotating block 30, and the second guide block 40 sequentially sleeved on the connecting shaft 10, wherein the first guide block 20 and the second guide block 40 are respectively fixedly connected to the connecting shaft 10, and the rotating block 30 is rotatably connected to the connecting shaft 10, so that the rotating block 30 can rotate around the connecting shaft 10 relative to the first guide block 20 and the second guide block 40. Four first diversion channels 21 are uniformly distributed on the first diversion block 20 along the circumferential direction, four conduction channels 31 are uniformly distributed on the rotating block 30 along the circumferential direction, four second diversion channels 41 are uniformly distributed on the second diversion block 40 along the circumferential direction, and the first diversion channels 21, the conduction channels 31 and the second diversion channels 41 can be communicated in a one-to-one correspondence manner. The first guide channel 21 and the second guide channel 41 are used for installing and fixing the rubber hose, and the first guide block 20, the rotating block 30 and the second guide block 40 are all sleeved on the connecting shaft 10, so that the first guide channel 21, the conducting channel 31 and the second guide channel 41 all extend along the axial direction of the connecting shaft 10. Therefore, the rubber tube can be installed in the same direction, and the layout of pipeline space is facilitated.

In order to realize the switching of the excavator operation mode through the reversing valve 100, a first arc-shaped groove 211 is formed in one side of the first guide block 20 facing the rotating block 30 from the first guide channel 21 along a first direction, one end of the first arc-shaped groove 211 is communicated with the first guide channel 21, a second arc-shaped groove 411 is formed in one side of the second guide block 40 facing the rotating block 30 from the second guide channel 41 along a second direction, one end of the second arc-shaped groove 411 is communicated with the second guide channel 41, the first direction is opposite to the second direction, one end of the first arc-shaped groove 211 far away from the first guide channel 21 and one end of the second arc-shaped groove 411 far away from the second guide channel 41 are arranged in an overlapping mode, and the rotating block 30 can enable the conducting channel 31 to be conducted or cut off with the first guide channel 21 and the second guide channel 41.

Assuming that the state in which the first guide passage 21A, the conducting passage 31A and the second guide passage 41A are communicated in a one-to-one correspondence manner is the first operation mode of the excavator, and the state in which the first guide passage 21B, the conducting passage 31A and the second guide passage 41B are communicated in a one-to-one correspondence manner is the second operation mode of the excavator, at this time, the first guide passage 21 and the second guide passage 41 can be conducted through the conducting passage 31.

The principle of the reversing valve 100 for realizing the excavator operation mode switching is as follows: when the excavator needs to switch from the operation mode to the operation mode two, the rotating block 30 is rotated along the second direction, at this time, the conducting channel 31A deviates from the connecting line direction of the first flow guide channel 21A and the second flow guide channel 41A, although the second flow guide channel 41A is communicated with the second arc-shaped groove 411, the first flow guide channel 21A is not provided with the arc-shaped groove along the second direction, and therefore, at this time, the first flow guide channel 21 and the second flow guide channel 41 are cut off. When the rotating block 30 rotates to the direction of the connection line between the end of the second arc-shaped groove 411 far from the second flow guide channel 41A and the end of the first arc-shaped groove 211 far from the first flow guide channel 21B, because the end of the first arc-shaped groove 211 far from the first flow guide channel 21B and the end of the second arc-shaped groove 411 far from the second flow guide channel 41A are overlapped, at this time, the first flow guide channel 21B and the second flow guide channel 41B are conducted, and the process of switching from the operation mode to the operation mode two is also completed.

It should be understood by those skilled in the art that when the excavator needs to switch from the operation mode to the first operation mode, the rotation block 30 only needs to be rotated along the first direction, and the specific principle is the same as above, and since the principle of switching from the operation mode to the second operation mode has been described in detail, the detailed description is omitted here.

Because four first guide channels 21 are uniformly distributed on the first guide block 20 along the circumferential direction, four conduction channels 31 are uniformly distributed on the rotating block 30 along the circumferential direction, and four second guide channels 41 are uniformly distributed on the second guide block 40 along the circumferential direction, the central angles between every two of the four first guide channels 21, between every two of the four conduction channels 31, and between every two of the four second guide channels 41 are 90 °, and therefore, the sum of the central angle of the first arc-shaped groove 211 and the central angle of the second arc-shaped groove 411 is 90 °.

Referring to fig. 2, preferably, in the present embodiment, the central angle of the first arc-shaped groove 211 and the central angle of the second arc-shaped groove 411 are both 45 °, so as to avoid interference between oil paths when the switching valve 100 switches the excavator operation modes.

In the present embodiment, the first guide block 20 and the rotating block 30 and the second guide block 40 and the rotating block 30 are respectively in spherical fit, so as to further improve the sealing performance of the reversing valve 100.

Specifically, in the present embodiment, the side of the first flow guiding block 20 facing the rotating block 30 and the side of the second flow guiding block 40 facing the rotating block 30 both have a concave structure, and the side of the rotating block 30 facing the first flow guiding block 20 and the side of the rotating block 30 facing the second flow guiding block 40 both have a convex structure matching with the concave structure.

Of course, in other embodiments, the side of the first flow guiding block 20 facing the rotating block 30 and the side of the second flow guiding block 40 facing the rotating block 30 may both be convex structures, and at this time, the side of the rotating block 30 facing the first flow guiding block 20 and the side of the rotating block 30 facing the second flow guiding block 40 both are concave structures matching with the convex structures.

Referring to fig. 3 again, in order to facilitate subsequent maintenance and replacement of parts, in this embodiment, the reversing valve 100 further includes a first transition block 60 and a second transition block 70 sleeved on the connecting shaft 10, the first transition block 60 and the second transition block 70 are respectively and fixedly connected to the connecting shaft 10, the first transition block 60 is disposed on one side of the first flow guide block 20 away from the rotating block 30, the second transition block 70 is disposed on one side of the second flow guide block 40 away from the rotating block 30, four third flow guide channels 61 are uniformly distributed on the first transition block 60 along the circumferential direction, four fourth flow guide channels 71 are uniformly distributed on the second transition block 70 along the circumferential direction, and the third flow guide channels 61 and the fourth flow guide channels 71 can be in one-to-one correspondence with each other through the first flow guide channels 21, the conduction channels 31 and the second flow guide channels 41 in sequence.

It should be noted that, a specific one-to-one correspondence relationship between the four third flow guide channels 61 and the four fourth flow guide channels 71 may refer to a specific one-to-one correspondence relationship between the first flow guide channels 21 and the second flow guide channels 41, and details are not described here.

Referring to fig. 4, in the present embodiment, the reversing valve 100 further includes a housing 80 covering the first transition block 60, the first diversion block 20, the rotation block 30, the second diversion block 40, and the second transition block 70, and an end of the first transition block 60 away from the first diversion block 20 and an end of the second transition block 70 away from the second diversion block 40 extend out of the housing 80 so as to be fixedly connected to the housing 80 through the first transition block 60 and the second transition block 70, respectively. The housing 80 is also provided with mounting holes to facilitate mounting of the reversing valve 100 to an excavator.

Of course, in other embodiments, the first transition block 60 and the second transition block 70 may be omitted directly, and the first guide block 20 and the second guide block 40 may be directly and fixedly connected to the housing 80.

Referring to fig. 5 again, after the reversing valve 100 includes the housing 80 covered outside the first transition block 60, the first diversion block 20, the rotation block 30, the second diversion block 40 and the second transition block 70, in order to enable the driver to rotate the rotation block 30 from the outside of the housing 80, in this embodiment, the reversing valve 100 further includes a rotation assembly 90, a through slot 81 is formed on the housing 80 corresponding to the rotation block 30, the rotation assembly 90 extends into the housing 80 through the through slot 81 and is fixedly connected with the rotation block 30, and the rotation assembly 90 moves along the through slot 81, so that the rotation block 30 can rotate relative to the connecting shaft 10.

Specifically, the cross section of the through groove 81 is of a convex structure, the rotating assembly 90 includes a first rotating rod 91, a second rotating rod 92 and a spring 93 which are fixedly connected in sequence, the spring 93 is fixedly connected with the rotating block 30, the diameter of the first rotating rod 91 is smaller than that of the second rotating rod 92, and the end surface of the second rotating rod 92 close to the first rotating rod 91 can be abutted against the table top of the convex structure. The rotating assembly 90 may further include a button 94, the button 94 is fixedly connected to the first rotating rod 91, and the material of the button 94 may be hard or rubber, so that the driver can press the rotating assembly 90.

The table top having the "convex" structure refers to a plane located at a middle position in the height direction of the "convex" structure. When the spring 93 is compressed by force, the end surface of the second rotating rod 92 close to the first rotating rod 91 is far away from the table surface of the "convex" structure, and the rotating assembly 90 can move along the through groove 81. When the spring 93 rebounds under the action of external force, the end surface of the second rotating rod 92 close to the first rotating rod 91 abuts against the table surface of the convex structure, the rotating assembly 90 can be locked relative to the through groove 81, and at this time, the rotating block 30 is fixed relative to the positions of the first flow guide block 20 and the second flow guide block 40.

Preferably, there is a height difference between the "convex" structures at the two ends of the through slot 81 and the "convex" structure at the middle section of the through slot 81, so that the driver can more obviously sense whether the rotating assembly 90 rotates in place during the switching mode.

The application also provides an excavator. The excavator provided by the embodiment comprises the reversing valve 100. Since the structure and advantageous effects of the direction valve 100 have been described in detail in the foregoing embodiments, no further description is provided herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A reversing valve is characterized by comprising a connecting shaft, and a first flow guide block, a rotating block and a second flow guide block which are sequentially sleeved on the connecting shaft, wherein the first flow guide block and the second flow guide block are respectively and fixedly connected with the connecting shaft, the rotating block is rotatably connected with the connecting shaft, four first flow guide channels are uniformly distributed on the first flow guide block along the circumferential direction, four conduction channels are uniformly distributed on the rotating block along the circumferential direction, four second flow guide channels are uniformly distributed on the second flow guide block along the circumferential direction, the first flow guide channels, the conduction channels and the second flow guide channels can be correspondingly communicated one by one, a first arc-shaped groove is formed in one side of the first flow guide block, which faces the rotating block, along the first direction from the first flow guide channels, one end of the first arc-shaped groove is communicated with the first flow guide channels, one side of the second flow guide block, which faces the rotating block, is provided with a second arc-shaped groove along a second direction from the second flow guide channel, one end of the second arc-shaped groove is communicated with the second flow guide channel, the first direction is opposite to the second direction, one end of the first arc-shaped groove, which is far away from the first flow guide channel, is overlapped with one end of the second arc-shaped groove, which is far away from the second flow guide channel, and the rotating block is rotated to enable the conduction channel to be conducted or cut off with the first flow guide channel and the second flow guide channel.

2. The reversing valve of claim 1, wherein the sum of the central angle of the first arcuate slot and the central angle of the second arcuate slot is 90 °.

3. The reversing valve of claim 2, wherein the central angle of the first arcuate slot and the central angle of the second arcuate slot are both 45 °.

4. The reversing valve of claim 1, wherein the first diverter block and the rotor block and the second diverter block and the rotor block each adopt a spherical fit.

5. The reversing valve according to claim 4, wherein the side of the first deflector block facing the rotor block and the side of the second deflector block facing the rotor block are both concave structures, and the side of the rotor block facing the first deflector block and the side of the rotor block facing the second deflector block are both convex structures matching the concave structures;

6. The reversing valve according to claim 1, further comprising a first transition block and a second transition block sleeved on the connecting shaft, wherein the first transition block and the second transition block are respectively and fixedly connected with the connecting shaft, the first transition block is arranged on one side of the first flow guide block away from the rotating block, the second transition block is arranged on one side of the second flow guide block away from the rotating block, four third flow guide channels are uniformly distributed on the first transition block along the circumferential direction, four fourth flow guide channels are uniformly distributed on the second transition block along the circumferential direction, and the third flow guide channels and the fourth flow guide channels can be sequentially communicated with the first flow guide channels, the conducting channels and the second flow guide channels in a one-to-one correspondence manner.

7. The reversing valve according to claim 6, further comprising a housing covering the first transition block, the first flow guide block, the rotation block, the second flow guide block and the second transition block, wherein one end of the first transition block, which is far away from the first flow guide block, and one end of the second transition block, which is far away from the second flow guide block, extend out of the housing, and the first transition block and the second transition block are respectively fixedly connected with the housing.

8. The reversing valve according to claim 7, further comprising a rotating assembly, wherein a through groove is formed in the housing corresponding to the rotating block, the rotating assembly extends into the housing through the through groove and is fixedly connected with the rotating block, and the rotating assembly moves along the through groove to enable the rotating block to rotate relative to the connecting shaft.

9. The reversing valve according to claim 8, wherein the cross section of the through groove is of a convex structure, the rotating assembly comprises a first rotating rod, a second rotating rod and a spring which are fixedly connected in sequence, the spring is fixedly connected with the rotating block, the diameter of the first rotating rod is smaller than that of the second rotating rod, and the second rotating rod is close to the end face of the first rotating rod and can be abutted against the table top of the convex structure.

10. An excavator comprising a diverter valve as claimed in any one of claims 1 to 9.