Mechanical operating mechanism for multi-way valve rod of excavator and excavator

Abstract

The utility model provides a mechanical operating mechanism for a valve rod of a multi-way valve of an excavator and the excavator. The operating mechanism comprises a first rotating plate, a second rotating plate and a third rotating plate, wherein the first rotating plate and an operating handle synchronously rotate around the same horizontal pivot; the long-strip-shaped push-pull mechanism moves along a set route and comprises a first connecting part rotationally connected to the other end of the first rotating plate, a second connecting part located at the other opposite end in the length extending direction and a connecting section located between the first connecting part and the second connecting part; the second rotating plate extends in the vertical direction and can rotate around a horizontal shaft, the second rotating plate comprises a first end rotationally connected to the multi-way valve support through the horizontal shaft and a second end rotationally connected to the second connecting part, and the second rotating plate is rotationally connected to the connecting rod at the position between the first end and the second end; when the operating handle rotates in the front-back direction, the push-pull mechanism drives the valve rod to be operated to stretch out or retract back. The operating mechanism provided by the utility model is simple in structure and small in occupied space.

Description

Technical Field

[0001] The utility model relates to the field of engineering machinery, in particular to a mechanical operating mechanism for a valve stem of a multi-way valve of an excavator and an excavator. Background Art

[0002] An excavator, also known as excavating machinery, is an earth-moving machine that uses a bucket to dig materials above or below the surface and load them into transport vehicles or unload them to a stockpile.

[0003] In the process of implementing the present invention, the inventors discovered that the prior art has at least the following problems:

[0004] At present, the bucket, boom, arm or front shovel and other moving parts of the excavator are all controlled by hydraulic operating handles. The operating handles require multiple hydraulic oil circuits to control the moving parts. This method takes up a lot of space, especially for small excavators with limited space. The oil circuit layout is very difficult. In addition, there is a risk of oil leakage in the connections between all hydraulic oil circuits and hydraulic components, which is also not conducive to subsequent maintenance work.

[0005] Therefore, a mechanical operating mechanism for a multi-way valve stem of an excavator and an excavator are needed to at least partially solve the above technical problems. Utility Model Content

[0006] The embodiment of the utility model provides a mechanical operating mechanism for a valve stem of a multi-way valve of an excavator and an excavator, which has a simple structure and occupies a small space.

[0007] In a first aspect, the utility model provides a mechanical operating mechanism for a valve stem of a multi-way valve of an excavator, the operating mechanism comprising:

[0008] A first rotating plate configured to be synchronously rotatable with the operating handle in the front-rear direction around the same horizontal pivot axis, one end of the first rotating plate being connected to the pivot axis;

[0009] an elongated push-pull mechanism configured to move along a set route, the push-pull mechanism comprising a first connecting portion rotatably connected to the other end of the first rotating plate, a second connecting portion located at the opposite other end along the length extension direction, and a connecting section located between the first connecting portion and the second connecting portion; and

[0010] a second rotating plate extending in a vertical direction and rotatable about a horizontal axis, the second rotating plate comprising a first end rotatably connected to a multi-way valve bracket for mounting the multi-way valve via the horizontal axis and a second end rotatably connected to the second connecting portion, the second rotating plate being rotatably connected to a connecting rod at a position between the first end and the second end, the other end of the connecting rod being used to connect to a valve stem to be operated of the multi-way valve;

[0011] When the operating handle is rotated in the front-rear direction, the valve stem to be operated is driven to extend or retract via the push-pull mechanism.

[0012] According to the operating mechanism of the utility model, compared with the existing mechanism that adopts hydraulic control of the valve stem of the multi-way valve, a first rotating plate that rotates synchronously with the operating handle is first provided, and then the first rotating plate is connected to the push-pull mechanism, and the other end of the push-pull mechanism is connected to the second rotating plate. Finally, the second rotating plate is rotatably connected to the connecting rod for connecting to the valve stem to be operated of the multi-way valve. When the operating handle is rotated in the front and rear directions, the valve stem to be operated is extended or retracted via the first rotating plate, the push-pull mechanism and the second rotating plate, so that the valve stem of the multi-way valve is completely controlled by a mechanical structure, and the corresponding action parts such as the bucket, boom, arm or front shovel can be controlled. The structure is simple and the space occupied is small.

[0013] Optionally, the first connecting portion and the second connecting portion of the push-pull mechanism are constructed as a fork joint or other rotating joints, and the connecting section at least includes a push-pull harness or a multi-link mechanism connected to the fork joints or other rotating joints at both ends.

[0014] Optionally, the push-pull harness is a long metal harness, comprising an outer sleeve located on the outer layer and a harness body located inside the outer sleeve. And / or

[0015] Both ends of the push-pull harness are further connected to the fork joint via guide posts.

[0016] Optionally, the metal wire harness is a wire harness made of steel wire or other metal materials.

[0017] Optionally, the operating handle is rotatably mounted on one side of the box, and a first fixing seat is mounted on the box at the same side of the operating handle, and the first fixing seat is connected to the push-pull harness via a guide sleeve assembly through which the push-pull harness passes. And / or

[0018] The multi-way valve bracket is provided with a second fixing seat at a side position close to the operating handle. The second fixing seat is connected to the push-pull wiring harness via a guide sleeve assembly for the push-pull wiring harness to pass through.

[0019] Optionally, the box is an operating box, an armrest box or other tool box. And / or

[0020] The guide sleeve assembly includes a guide sleeve for the push-pull harness to pass through, and the outer wall of the guide sleeve is sleeved with a fixing nut for connecting to the first fixing seat or the second fixing seat.

[0021] Optionally, the portion of the push-pull harness located behind the second fixing seat is configured to pass through the bottom of the multi-way valve and then be connected to the valve stem to be operated of the multi-way valve.

[0022] Optionally, the first end of the second rotating plate is located above the second end.

[0023] Optionally, the valve stem to be operated is a valve stem operated by a front shovel or a valve stem operated by other components.

[0024] In a second aspect, the utility model further provides an excavator comprising the operating mechanism of the above technical solution.

[0025] According to the excavator of the present invention, since the valve stem of the multi-way valve thereon is controlled by adopting the operating mechanism of the present invention, the structure of the excavator is simplified and the use safety of the excavator is improved.

[0026] By utilizing the technical solution according to the embodiment of the present utility model, the beneficial effects that can be obtained are at least:

[0027] The operating mechanism of the utility model utilizes the first rotating plate, the push-pull mechanism and the second rotating plate to drive the valve stem to be operated to extend or retract, thereby completely controlling the valve stem of the multi-way valve with a mechanical structure, having a simple structure and occupying a small space.

[0028] Additional advantages, purposes, and features of the present invention will be partially set forth in the following description and will partially become apparent to those skilled in the art after studying the following or may be learned from practice of the present invention. The purposes and other advantages of the present invention may be achieved and obtained by the structures specifically pointed out in the specification and drawings.

[0029] Those skilled in the art will understand that the purposes and advantages that can be achieved by the present invention are not limited to those specifically described above, and the above and other purposes that can be achieved by the present invention will be more clearly understood based on the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings described herein are intended to provide a further understanding of the present invention, constitute a part of this application, and do not constitute a limitation of the present invention. The components in the drawings are not drawn to scale, but are merely for the purpose of illustrating the principles of the present invention. To facilitate the illustration and description of some parts of the present invention, the corresponding parts in the drawings may be enlarged, that is, they may be larger than other components in the exemplary device actually manufactured according to the present invention. In the drawings:

[0031] Figure 1 is a schematic diagram of an operating mechanism according to an embodiment of the present utility model;

[0032] Figure 2 for Figure 1 A schematic diagram of the operating mechanism shown in another angle;

[0033] Figure 3 for Figure 1 Middle A is a partial enlarged schematic diagram;

[0034] Figure 4 for Figure 1 A partial enlarged schematic diagram of the structure; and

[0035] Figure 5 Schematic diagram of a push-pull mechanism in an operating mechanism according to an embodiment of the present invention.

[0036] Description of reference numerals:

[0037] 10. Operation box;

[0038] 11. Basic framework;

[0039] 12. Operating handle;

[0040] 13. Pivot;

[0041] 20. Multi-way valve;

[0042] 30. Multi-way valve bracket;

[0043] 100. Operating mechanism;

[0044] 111. First rotating plate;

[0045] 120. Push-pull mechanism;

[0046] 121, fork joint;

[0047] 122, steel wire; 1221, outer sleeve; 1222, steel wire body;

[0048] 123. Guide column;

[0049] 124, guide sleeve assembly; 1241, guide sleeve; 1242, fixing nut;

[0050] 125. First fixing seat;

[0051] 126, second fixed seat;

[0052] 130. Second rotating plate; 131. Horizontal axis;

[0053] 140. Connecting rod. DETAILED DESCRIPTION

[0054] The objectives and functions of the present invention, as well as methods for achieving these objectives and functions, will be clarified with reference to exemplary embodiments. However, the present invention is not limited to the exemplary embodiments disclosed below; it can be implemented in various forms. The essence of this specification is merely to help those skilled in the relevant art to comprehensively understand the specific details of the present invention.

[0055] It should be noted that the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0056] Ordinal numbers such as "first" and "second" cited in the present invention are merely identifiers and do not have any other meanings, such as a specific order, etc. Moreover, for example, the term "first component" itself does not imply the existence of a "second component", and the term "second component" itself does not imply the existence of a "first component".

[0057] It should be noted that the terms "upper", "lower", "front", "back", "left", "right", "inside", "outside" and similar expressions used in this document are for illustrative purposes only and are not limiting.

[0058] First, for ease of description, the box described herein is described using the operating box 10 of an excavator as an example. The box may also be an armrest box or other tool box. Furthermore, the portion of the push-pull harness located behind the second mounting base 126 mentioned herein refers to the portion of the push-pull harness located between the second mounting base 126 and the second rotating plate 130.

[0059] The operating box 10 is an important device of the excavator. It is an existing mechanism and will not be described in detail here. In order to facilitate the rotation of the operating box 10, the operating box 10 is generally connected to an operating handle 12, so that the operating handle 12 can be used to apply force when lifting or pressing the operating box 10.

[0060] In the drawings of this embodiment, since the innovation of the present application is not involved and for the sake of simplicity, the operation box 10 only shows the basic frame 11. The specific form of the basic frame 11 is not limited.

[0061] The present invention provides a mechanical operating mechanism 100 for the valve stem of an excavator multi-way valve 20 and an excavator (not shown). The operating mechanism 100 can be used, for example, in the field of engineering machinery. It can overcome the complex structure and safety risks associated with the hydraulic control of existing multi-way valve stems, replacing them with a fully mechanically controlled multi-way valve stem, resulting in a simpler structure, smaller footprint, and improved safety.

[0062] In a first aspect, the present invention provides a mechanical operating mechanism 100 for the valve stem of a multi-way valve 20 of an excavator. In a preferred embodiment, as Figure 1 and Figure 2 As shown, Figure 1 FIG. 1 is a schematic diagram of an operating mechanism 100 according to an embodiment of the present invention. Figure 2 for Figure 1 The schematic diagram of the operating mechanism 100 shown in FIG. The operating mechanism 100 includes a first rotating plate 111, a push-pull mechanism 120, and a second rotating plate 130. The first rotating plate 111 is connected to the pivot 13 of the operating handle 12, rotating synchronously with the operating handle 12. The push-pull mechanism 120, a key component of the present invention, drives the push-pull mechanism 120 forward or backward along a set route when the operating handle 12 rotates. The second rotating plate 130 rotates accordingly as the push-pull mechanism 120 moves forward or backward, extending or retracting the valve stem (not shown) via the connecting rod 140.

[0063] Specifically, the first rotating plate 111 and the operating handle 12 can rotate synchronously in the front-to-back direction around the same horizontal pivot 13. One end of the first rotating plate 111 is connected to the pivot 13 in the front-to-back direction, for example, to the outer end of the pivot 13. The shape of the first rotating plate 111 can be plate-shaped, columnar, etc.

[0064] The long push-pull mechanism 120 moving along a set route includes a first connection portion rotatably connected to the other end of the first rotating plate 111, a second connection portion located at the other end opposite to the length extension direction, and a connection section located between the first connection portion and the second connection portion.

[0065] There is no limitation on the specific shape of the long strip push-pull mechanism 120. For example, the push-pull mechanism 120 may be a push-pull wire harness (eg, steel wire 122) or a multi-link mechanism.

[0066] refer to Figure 4, the second rotating plate 130 is extended in the vertical direction and is rotatable around a horizontal axis 131. The second rotating plate 130 includes a first end rotatably connected to a multi-way valve bracket 30 for mounting the multi-way valve 20 via the horizontal axis 131 and a second end rotatably connected to the second connecting portion. The second rotating plate 130 is rotatably connected to the connecting rod 140 at a position between the first end and the second end. The other end of the connecting rod 140 is used to connect to the valve stem to be operated of the multi-way valve 20. Preferably, the first end of the second rotating plate 130 can be located above the second end, but this does not represent a limitation. The first end can also be located below the second end. In addition, the specific form of the multi-way valve bracket 30 is not limited. Generally speaking, the basic frame 11 of the operating box 10 and the multi-way valve bracket 30 can both be directly assembled on the vehicle frame of the excavator.

[0067] When the operating handle 12 rotates in the front-rear direction, the push-pull mechanism 120 drives the valve stem to be operated to extend or retract.

[0068] by Figure 1 For example, when the operating handle 12 is rotated forward, it drives the first rotating plate 111 to rotate clockwise and downward, pressing down on one end of the push-pull mechanism 120 connected to the first rotating plate 111, thereby pushing the entire push-pull mechanism 120 forward along a predetermined path. This forward movement of the push-pull mechanism 120 pushes the second rotating plate 130 forward, causing the connecting rod 140 connected to the second rotating plate 130 to move forward accordingly, ultimately extending the valve stem of the multi-way valve 20 to be operated, which is connected to the connecting rod 140. Similarly, when the operating handle 12 is rotated backward, the valve stem of the multi-way valve 20 to be operated, which is connected to the connecting rod 140, retracts.

[0069] It can be understood that, logically speaking, depending on the installation orientation of the first rotating plate 111, when the operating handle 12 rotates forward, it can also drive the valve stem to be operated to retract, and correspondingly, when the operating handle 12 rotates backward, it can drive the valve stem to be operated to extend.

[0070] According to the operating mechanism 100 of the present invention, compared with the existing mechanism that adopts hydraulic control of the valve stem of the multi-way valve, a first rotating plate 111 that rotates synchronously with the operating handle 12 is first provided, and then the first rotating plate 111 is connected to the push-pull mechanism 120, and the other end of the push-pull mechanism 120 is connected to the second rotating plate 130. Finally, the second rotating plate 130 is rotatably connected to the connecting rod 140 for connecting to the valve stem to be operated of the multi-way valve 20. When the operating handle 12 is rotated in the front and rear directions, the valve stem to be operated is extended or retracted via the first rotating plate 111, the push-pull mechanism 120 and the second rotating plate 130, so that the valve stem of the multi-way valve 20 is completely controlled by a mechanical structure, and the corresponding action parts such as the bucket, arm, arm or front shovel can be controlled. The structure is simple and the space occupied is small.

[0071] For the sake of convenience, the push-pull mechanism 120 is described below by taking a steel wire structure as an example, but this does not mean that it is limiting. Figure 5 The first and second connecting parts can be forked joints 121 or other rotating joints. The connecting section includes a steel wire 122 connected to the forked joints 121 at both ends. The steel wire 122 includes an outer sleeve 1221 for protection and a steel wire body 1222 located within the outer sleeve 1221. Furthermore, to facilitate the movement of the steel wire 122, each end of the steel wire 122 can be connected to the forked joint 121 via a guide post 123.

[0072] It will be appreciated that the steel wire 122 in this embodiment can be a single steel wire with a certain degree of rigidity, or a bundle of multiple steel wires. Initially, the steel wire 122 is curved. When the operating handle 12 is pushed, the steel wire 122 can move along a predetermined path without changing its curved shape, or with a certain degree of change, so that the end connected to the second rotating plate 130 moves forward or backward a certain distance, thereby pulling the connecting rod 140 forward or backward.

[0073] In a preferred embodiment, in order to allow the steel wire 122 to better move along the set route, the operating box 10 may be equipped with a first fixing seat 125 at the same side of the operating handle 12. The first fixing seat 125 is connected to the steel wire 122 via a guide sleeve assembly 124 for the steel wire 122 to pass through. The multi-way valve bracket 30 may be equipped with a second fixing seat 126 at a side position close to the operating handle 12. The second fixing seat 126 is connected to the steel wire 122 via a guide sleeve assembly 124 for the steel wire 122 to pass through. The specific shapes of the first fixing seat 125 and the second fixing seat 126 may also not be limited. Under the push of the operating handle 12, the steel wire 122 can better move along the set route under the guidance of the guide sleeve assemblies 124 on the first fixing seat 125 and the second fixing seat 126.

[0074] refer to Figure 3 and Figure 5 The guide sleeve assembly 124 may include a guide sleeve 1241 for the steel wire 122 to pass through. The outer wall of the guide sleeve 1241 is sleeved with a fixing nut 1242 connected to the first fixing seat 125 or the second fixing seat 126.

[0075] To better arrange the steel wire 122 and reduce space, the portion of the steel wire 122 located behind the second fixing seat 126 is configured to pass under the multi-way valve 20 and then connect to the valve stem to be operated by the multi-way valve 20. The valve stem to be operated is not limited to the valve stem of the front shovel. The valve stem to be operated can be a valve stem operated by other components, and is not limited to the front shovel valve stem.

[0076] In summary, according to the operating mechanism 100 of the present invention, the first rotating plate 111, the push-pull mechanism 120 and the second rotating plate 130 are used to drive the valve stem to be operated to extend or retract, thereby achieving complete mechanical control of the valve stem of the multi-way valve 20, which has a simple structure and occupies little space.

[0077] In a second aspect, the present invention further provides an excavator (not shown) comprising the operating mechanism 100 of the above embodiment.

[0078] Since the excavator according to the present invention includes the operating mechanism 100 of the above embodiment, all features and effects of the operating mechanism 100 are included and are not described in detail here.

[0079] In combination with the description and practice of the utility model disclosed herein, other embodiments of the utility model are easy to think of and understand for those skilled in the art. The description and embodiments are considered to be exemplary only, and the true scope and spirit of the utility model are defined by the claims.

Claims

1. A mechanical operating mechanism for a multi-way valve stem of an excavator, characterized in that: The operating mechanism comprises: A first rotating plate configured to be synchronously rotatable with the operating handle in the front-rear direction around the same horizontal pivot axis, one end of which is connected to the pivot axis; A long push-pull mechanism configured to move along a set route, the push-pull mechanism comprising a first connection portion rotatably connected to the other end of the first rotating plate, a second connection portion located at the other end opposite to the first rotating plate along the length extension direction, and a connection section located between the first connection portion and the second connection portion; and a second rotating plate extending in the vertical direction and rotatable about a horizontal axis, the second rotating plate comprising a first end rotatably connected to a multi-way valve bracket for mounting the multi-way valve via the horizontal axis and a second end rotatably connected to the second connecting portion, the second rotating plate being rotatably connected to a connecting rod at a position between the first end and the second end, the other end of the connecting rod being used to connect to a valve stem to be operated of the multi-way valve; When the operating handle is rotated in the front-rear direction, the valve stem to be operated is driven to extend or retract via the push-pull mechanism.

2. The operating mechanism according to claim 1, characterized in that: The first connection part and the second connection part of the push-pull mechanism are configured as fork joints, and the connection section at least includes a push-pull harness or a multi-link mechanism connected to the fork joints at both ends.

3. The operating mechanism according to claim 2, characterized in that: The push-pull wire harness is a long strip metal wire harness, including an outer sleeve located on the outer layer and a wire harness body located inside the outer sleeve; and / or Both ends of the push-pull harness are also connected to the fork joint via guide posts, respectively.

4. The operating mechanism according to claim 3, characterized in that: The metal wire harness is made of steel wire.

5. The operating mechanism according to claim 2, characterized in that: The operating handle is rotatably arranged on one side of the box, and a first fixing seat is installed on the box at the same side as the operating handle, and the first fixing seat is connected to the push-pull harness via a guide sleeve assembly for the push-pull harness to pass through; and / or The multi-way valve bracket is provided with a second fixing seat at a side position close to the operating handle, and the second fixing seat is connected to the push-pull wiring harness via a guide sleeve assembly for the push-pull wiring harness to pass through.

6. The operating mechanism according to claim 5, characterized in that: The box is an operation box or an armrest box; and / or The guide sleeve assembly comprises a guide sleeve for the push-pull wire harness to pass through, and the outer wall of the guide sleeve is sleeved with a fixing nut for connecting to the first fixing seat or the second fixing seat.

7. The operating mechanism according to claim 5, characterized in that: The portion of the push-pull harness located behind the second fixing seat is configured to pass through the bottom of the multi-way valve and then be connected to the valve stem to be operated of the multi-way valve.

8. The operating mechanism according to claim 1, characterized in that: The first end of the second rotating plate is located above the second end.

9. The operating mechanism according to claim 1, characterized in that: The valve stem to be operated is a valve stem for front shovel operation.

10. An excavator, characterized in that: The excavator includes the operating mechanism according to any one of claims 1 to 9.

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