Control mechanism of safety valve of excavator and excavator with control mechanism

Abstract

The utility model provides a control mechanism of an excavator safety valve and an excavator with the control mechanism, and the control mechanism comprises a support fixed on the excavator safety valve; the handle assembly comprises an adjusting handle and a handle connecting piece, the first end of the handle connecting piece is connected with the support in a hinged mode, the handle connecting piece is fixedly connected with the adjusting handle, and the handle connecting piece can rotate relative to the support by controlling the adjusting handle; the first end of the transition connecting rod is hinged to the second end of the handle connecting piece, and the second end of the transition connecting rod is used for being hinged to the end of a valve element connecting rod of the excavator safety valve. The control mechanism of the excavator safety valve reduces the cost and improves the control stability of the safety valve.

Description

Technical Field

[0001] The utility model relates to the technical field of heavy machinery, in particular to a control mechanism of a safety valve of an excavator and an excavator with the same. Background Art

[0002] An excavator, also known as a backhoe, is an earth-moving machine that uses a bucket to dig materials above or below the surface of the machine and load them into a transport vehicle or unload them to a stockpile. An excavator consists of a power unit, a working device, a slewing mechanism, a control mechanism, a transmission mechanism, a traveling mechanism and other structures, and is mostly used for digging materials such as soil, coal, and silt.

[0003] The excavator safety valve is used to control the on and off of the control oil circuit of the bucket, which ensures the safety of the bucket during operation. At present, the control method of the excavator safety valve is mainly electronic control; the electronic control mechanism is not only complex in structure and high in cost, but also contains a large number of electronic components. As the electronic components grow in use, they are prone to failure, which leads to the unstable working state of the excavator safety valve, thereby affecting the working efficiency of the excavator. Therefore, how to reduce the cost of the control mechanism of the excavator safety valve and improve the control stability of the safety valve are technical problems that need to be solved urgently. Utility Model Content

[0004] In view of this, the utility model provides a control mechanism of an excavator safety valve and an excavator having the same, so as to solve one or more technical problems existing in the prior art.

[0005] According to one aspect of the utility model, a control mechanism of an excavator safety valve is disclosed, and the control mechanism comprises:

[0006] A bracket, fixed on the safety valve of the excavator;

[0007] A handle assembly, comprising an adjustment handle and a handle connector, wherein a first end of the handle connector is hingedly connected to the bracket, and the handle connector is fixedly connected to the adjustment handle, and the adjustment handle can be manipulated to cause the handle connector to rotate relative to the bracket;

[0008] A transition connecting rod, a first end of which is hingedly connected to the second end of the handle connecting piece, and the second end of the transition connecting rod is used to be hingedly connected to the end of the valve core connecting rod of the excavator safety valve.

[0009] In some embodiments of the present utility model, the bracket has a first pin shaft, and the first end of the handle connecting member is hingedly connected to the bracket through the first pin shaft.

[0010] In some embodiments of the present invention, the first end of the handle connector has a handle sleeve, and the handle sleeve is disposed outside the first pin shaft.

[0011] In some embodiments of the present invention, the control mechanism further includes a wear-resistant steel sleeve, and the wear-resistant steel sleeve is arranged between the handle sleeve and the first pin shaft.

[0012] In some embodiments of the present invention, the second end of the handle connecting member has a second pin, and the second end of the handle connecting member is hingedly connected to the first end of the transition connecting rod through the second pin.

[0013] In some embodiments of the present invention, the first end of the valve core connecting rod has a third pin shaft, the second end of the transition connecting rod is hingedly connected to the first end of the valve core connecting rod through the third pin shaft, and the second end of the valve core connecting rod is connected to the valve core of the safety valve.

[0014] In some embodiments of the present invention, the angle between the adjustment handle and the handle connector is 100 to 130 degrees.

[0015] In some embodiments of the present invention, the bracket and the transition link are respectively located on two opposite sides of the excavator safety valve.

[0016] In some embodiments of the present invention, the axis of the adjustment handle and the axis of the handle sleeve are perpendicular to each other.

[0017] According to another aspect of the utility model, an excavator is also disclosed, and the excavator includes a control mechanism for the excavator safety valve as described in any of the above embodiments.

[0018] The control mechanism of the excavator safety valve disclosed in the embodiment of the utility model has a bracket fixed on the safety valve, a handle connecting piece can rotate relative to the bracket, and the two ends of the transition connecting rod are respectively hingedly connected to the second end of the handle connecting piece and the end of the valve core connecting rod of the safety valve. The bracket, handle connecting piece, transition connecting rod and valve core connecting rod on the safety valve in the control mechanism form a four-bar mechanism, and the valve core movement of the safety valve can be achieved by controlling the adjustment handle, so that the working state of the safety valve can be changed by controlling the adjustment handle. The control mechanism has a simple structure and is easy to install and maintain. The control mechanism is realized by mechanical means, which not only avoids the occurrence of component failure, but also improves the convenience of operation. In summary, the control mechanism of the excavator safety valve not only reduces the cost of the control mechanism of the excavator safety valve, but also improves the control stability of the safety valve, and further improves the working efficiency of the excavator.

[0019] Additional advantages, purposes, and features of the present invention will be partially described in the following description, and will become partially apparent to those skilled in the art after studying the following, or may be learned from the practice of the present invention. The purposes and other advantages of the present invention can be achieved and obtained by the structures specifically pointed out in the written description and its claims and the drawings.

[0020] Those skilled in the art will understand that the purposes and advantages that can be achieved by the present invention are not limited to the above specific description, 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

[0021] The drawings described herein are used to provide a further understanding of the present invention, constitute a part of the present application, and do not constitute a limitation of the present invention. The components in the drawings are not drawn to scale, but are only for the purpose of illustrating the principles of the present invention. In order 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 become larger relative to other components in the exemplary device actually manufactured according to the present invention. In the drawings:

[0022] Figure 1 The present invention is a schematic structural diagram of a control mechanism for an excavator safety valve according to an embodiment of the present invention.

[0023] Figure 2 This is a schematic diagram of the control mechanism when the excavator safety valve is in the open state.

[0024] Figure 3 This is a schematic diagram of the control mechanism when the excavator safety valve is in a closed state.

[0025] Figure 4 The utility model is a schematic structural diagram of an excavator safety valve according to an embodiment of the present utility model.

[0026] Figure 5 for Figure 4 Front view of the excavator safety valve shown.

[0027] Figure 6 The present invention is a schematic structural diagram of a bracket for an excavator safety valve according to an embodiment of the present invention.

[0028] Figure 7 for Figure 6 Front view of the bracket shown.

[0029] Figure 8 The present invention is a schematic structural diagram of a handle assembly of an excavator safety valve according to an embodiment of the present invention.

[0030] Fig. 9 for Figure 8A front view of the handle assembly is shown.

[0031] Fig.10 The present invention is a schematic structural diagram of a transition connecting rod of an excavator safety valve according to an embodiment of the present invention.

[0032] Reference numerals:

[0033] Safety valve 001 valve core 002 bracket 100 handle assembly 200 transition connecting rod 300 valve core connecting rod 400 adjustment handle 210 handle connecting piece 220 handle sleeve 230 first pin 110 second pin 240 third pin 410 DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiment of the utility model more clear, the embodiment of the utility model is further described in detail below in conjunction with the accompanying drawings. Here, the illustrative embodiment of the utility model and its description are used to explain the utility model, but are not used as a limitation of the utility model.

[0035] It should be noted here that in order to avoid obscuring the present invention due to unnecessary details, only the structures and / or processing steps closely related to the scheme according to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0036] It should be emphasized that the terms “include / comprises / has” when used herein refer to the presence of features, elements, steps or components, but do not exclude the presence or addition of one or more other features, elements, steps or components.

[0037] It should also be noted that the directional nouns in this specification are relative to the position directions shown in the drawings; if there is no special explanation, the term "connection" in this article can refer to not only direct connection, but also indirect connection with an intermediate. Direct connection means that two parts are connected without the help of an intermediate part, and indirect connection means that two parts are connected with the help of other parts.

[0038] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the accompanying drawings, the same reference numerals represent the same or similar components.

[0039] Figure 1 FIG. 1 is a schematic diagram of the structure of the control mechanism of the excavator safety valve according to an embodiment of the utility model. Figure 1 As shown, the control mechanism at least includes a bracket 100 , a handle assembly 200 and a transition link 300 .

[0040] The bracket 100 is fixed on the excavator safety valve 001; the handle assembly 200 includes an adjusting handle 210 and a handle connector 220, the first end of the handle connector 220 is hingedly connected to the bracket 100, the handle connector 220 is fixedly connected to the adjusting handle 210, and the adjusting handle 210 can be manipulated to rotate the handle connector 220 relative to the bracket 100; the first end of the transition link 300 is hingedly connected to the second end of the handle connector 220, and the second end of the transition link 300 is used to be hingedly connected to the end of the valve core link 400 of the excavator safety valve 001.

[0041] In the control mechanism of the excavator safety valve 001 disclosed in the utility model, the handle connector 220 and the adjustment handle 210 can rotate synchronously, that is, rotating the adjustment handle 210 can make the handle connector 220 rotate relative to the bracket 100. At this time, since the two ends of the transition link 300 are respectively hingedly connected to the handle connector 220 and the valve core link 400, the valve core link 400 is rotated based on the transition link 300 as the handle connector 220 rotates. Since the end of the valve core link 400 is connected to the valve core 002 of the safety valve 001, the valve core 002 is moved as the valve core link 400 rotates, thereby changing the position state of the valve core 002, so that the excavator safety valve 001 can work in an open state or a closed state. It can be understood that when the safety valve 001 works in an open state, the oil circuit of the hydraulic control system of the bucket is in a connected state; when the safety valve 001 works in a closed state, the oil circuit of the hydraulic control system of the bucket is in a disconnected state.

[0042] Figure 2 This is a schematic diagram of the control mechanism of the excavator safety valve 001 in the open state. Figure 3 The schematic diagram of the control mechanism of the excavator safety valve 001 in the closed state is as follows: Figure 2 and Figure 3 As shown, turning the adjusting handle 210 to the left can open the valve core 002 of the safety valve 001, and turning the adjusting handle 210 to the right can close the valve core 002 of the safety valve 001; the control mechanism has a simple structure, is easy to operate, has a low cost, and improves the working stability of the safety valve 001.

[0043] In another embodiment, the bracket 100 has a first pin 110, and the first end of the handle connector 220 is hingedly connected to the bracket 100 through the first pin 110. In this embodiment, the bracket 100 is fixed to the excavator safety valve 001, and the end of the handle connector 220 is sleeved on the first pin 110. The first pin 110 serves as the rotation axis of the handle connector 220, and the handle connector 220 can be rotated around the first pin 110 by rotating the adjustment handle 210. Figure 6 and Figure 7 As shown, the bracket 100 is provided with a mounting hole, and the bracket 100 and the excavator safety valve 001 can be fixed by screws or bolts. Figure 1 , when the bracket 100 is fixed on the excavator safety valve 001, the bracket 100 is specifically located on the right side of the safety valve 001, and the first pin 110 on the bracket 100 extends horizontally toward the left side of the safety valve 001, and the handle connector 220 is located at the left end of the first pin 110. That is, in this embodiment, the handle connector 220 and the bracket 100 are respectively located on opposite sides of the safety valve 001, and the handle connector 220 rotates on a plane parallel to the left end surface of the safety valve 001. Exemplarily, in order to realize the rotation of the handle connector 220 around the first pin 110, a through hole may be provided at the end of the handle connector 220, and the through hole of the handle connector 220 can be directly sleeved on the first pin 110.

[0044] Furthermore, the first end of the handle connector 220 has a handle sleeve 230 , and the handle sleeve 230 is sleeved on the outside of the first pin shaft 110 . Figure 8 FIG. 2 is a structural schematic diagram of a handle assembly 200 of an excavator safety valve 001 according to an embodiment of the utility model. Figure 8 As shown, the handle cover 230 is perpendicular to the adjustment handle 210 and the handle connector 220. At this time, the adjustment handle 210 and the handle connector 220 are arranged at intervals around the handle cover 230 at the end of the handle cover 230. In this embodiment, the adjustment handle 210, the handle connector 220 and the handle cover 230 can be an integral structure or a split structure. When the split structure is used, the ends of the adjustment handle 210 and the ends of the handle connector 220 can be further fixed to the end of the handle cover 230 by bonding or welding. Since the adjustment handle 210, the handle connector 220 and the handle cover 230 are an integral structure or are fixed together, when the adjustment handle 210 is rotated, the handle cover 230 rotates around the first pin 110, and the handle connector 220 fixedly connected to the handle cover 230 also rotates around the first pin 110.

[0045] In order to reduce the wear of the handle cover 230 and increase the service life of the handle assembly 200, the control mechanism may further include a wear-resistant steel cover (not shown in the figure), which is arranged between the handle cover 230 and the first pin 110. In this embodiment, the wear-resistant steel cover serves as a transition piece and has the advantage of wear resistance. There are two wear-resistant steel covers between the handle cover 230 and the first pin 110. In this embodiment, the wear of the handle cover 230 is transferred to the two wear-resistant steel covers, thereby reducing the wear of the handle cover 230, increasing the service life of the handle assembly 200, and thus reducing the cost.

[0046] In order to further realize the hinged connection between the handle connector 220 and the transition link 300, the second end of the handle connector 220 has a second pin 240, and the first end of the transition link 300 is hingedly connected to the second end of the handle connector through the second pin 240. Figure 6 As can be seen in the figure, the end of the handle connector 220 away from the handle sleeve 230 is provided with a second pin 240, and the second pin 240 and the handle connector 220 can be an integral structure or a split structure. When the second pin 240 and the handle connector 220 are split structures, the second pin 240 and the handle connector 220 can be connected in a detachable manner or a non-detachable manner. Exemplarily, the second pin 240 and the handle connector 220 are connected by bonding or welding. In order to realize the rotation of the handle connector 220 relative to the transition link 300, the end of the transition link 300 is provided with a through hole for being sleeved on the outside of the second pin 240; when the through hole is sleeved on the outside of the second pin 240, the transition link 300 is rotated and moved as the handle connector 220 rotates. In addition, the transition link 300 and the handle connector are located on the same side of the safety valve, that is, the bracket and the transition link are respectively located on opposite sides of the excavator safety valve.

[0047] Similarly, in order to realize the hinged connection between the transition link 300 and the valve core link 400, the first end of the valve core link 400 has a third pin 410, the second end of the transition link 300 is hingedly connected to the first end of the valve core link through the third pin 410, and the second end of the valve core link 400 is connected to the valve core 002 of the safety valve 001. Figure 5 As shown, the first end of the valve core connecting rod 400 refers to the right end of the valve core connecting rod 400. In this embodiment, the right end of the valve core connecting rod 400 is hingedly connected to the transition connecting rod 300, and the left end of the valve core connecting rod 400 is connected to the valve core 002 of the safety valve 001. Under the rotation of the valve core connecting rod 400, the valve core 002 moves in position, thereby realizing the opening and closing of the safety valve 001.

[0048] Exemplarily, the second end of the transition link 300 is provided with a through hole, and the through hole at the second end of the transition link 300 is directly sleeved on the outside of the third pin 410 to realize the hinged connection between the transition link 300 and the valve core link 400. In this embodiment, both ends of the transition link 300 are provided with through holes (refer to Fig.10 ), the two through holes are respectively used to set the second pin shaft 240 on the handle connecting piece 220 and the third pin shaft 410 on the valve core connecting rod 400. Figure 4 This is a schematic diagram of the structure of an excavator safety valve 001 according to an embodiment of the utility model. Figure 4It can be seen that the left end of the valve core connecting rod 400 has a valve core hole that matches the valve core 002. When the valve core connecting rod 400 is assembled in place, the right end of the valve core connecting rod 400 is hingedly connected to the end of the transition connecting rod 300. When the handle connecting member 220 rotates, the handle connecting member 220 drives the valve core connecting rod 400 to rotate through the transition connecting rod 300, and the valve core 002 located in the valve core hole rotates synchronously with the valve core connecting rod 400. The rotation of the valve core 002 changes the working state of the valve core 002.

[0049] In the handle assembly 200 , in order to facilitate the manipulation of the adjustment handle 210 and save effort when operating the handle assembly 200 , the angle between the adjustment handle 210 and the handle connector 220 may be an obtuse angle. Fig. 9 for Figure 8 The front view of the handle assembly 200 is shown from Fig. 9 It can be seen that the angle between the adjustment handle 210 and the handle connector 220 is greater than 90 degrees. For example, the angle between the adjustment handle 210 and the handle connector 220 is 100 to 130 degrees. In addition, the axis of the adjustment handle 210 and the axis of the handle sleeve 230 are perpendicular to each other. Since the handle sleeve 230 is sleeved outside the first pin shaft 110, the axis of the handle sleeve 230 and the axis of the first pin shaft 110 are parallel to each other, so the axis of the adjustment handle 210 and the axis of the first pin shaft 110 are also perpendicular.

[0050] In the above embodiment, the adjustment handle 210 on the handle assembly 200 is pulled to the left, and the adjustment handle 210 will rotate to the left by a certain angle with the axis of the first pin shaft 110 as the rotation axis. At the same time, the handle connecting member 220 will drive the transition connecting rod 300 to move to the upper left through the second pin shaft 240 at its end, and the transition connecting rod 300 drives the valve core connecting rod 400 to rotate counterclockwise through the third pin shaft 410 on the valve core connecting rod 400, thereby opening the valve core 002, so that the safety valve 001 works in the open state. When the adjustment handle 210 on the handle assembly 200 is pulled to the right, the adjustment handle 210 will rotate to the right by a certain angle with the axis of the first pin shaft 110 as the rotation axis. At the same time, the handle connector 220 will drive the transition link 300 to move to the lower right through the second pin shaft 240 at its end, and the transition link 300 drives the valve core link 400 to rotate clockwise through the third pin shaft 410 on the valve core link 400, thereby closing the valve core 002, so that the safety valve 001 works in the disconnected state. Further, after the adjustment handle 210 is pulled, in order to keep the adjustment handle 210 in the preset state, the friction between the handle cover 230 on the handle assembly 200 and the first pin shaft 110 can be increased, or the adjustment handle 210 can be set to a gear position.

[0051] Through the above embodiments, it can be found that the control mechanism of the excavator safety valve disclosed in the present application, the bracket is fixed on the safety valve, the handle connecting piece can rotate relative to the bracket, the two ends of the transition connecting rod are respectively hingedly connected with the second end of the handle connecting piece and the end of the valve core connecting rod of the safety valve, and the bracket, handle connecting piece, transition connecting rod and valve core connecting rod on the safety valve in the control mechanism form a four-bar mechanism, and the valve core movement of the safety valve can be realized by manipulating the adjustment handle, so that the working state of the safety valve can be changed by manipulating the adjustment handle. The control mechanism has a simple structure, is easy to install and maintain, and has a compact overall structure and has little effect on the overall size of the excavator. The control mechanism is realized by mechanical means, which not only avoids the occurrence of component failure, but also improves the convenience of operation; the cost of the mechanical control mechanism is reduced by about 30% compared with other safety valve control mechanisms. In summary, the control mechanism of the excavator safety valve not only reduces the cost of the control mechanism of the excavator safety valve, but also improves the control stability of the safety valve, and further improves the working efficiency of the excavator.

[0052] In the present invention, features described and / or illustrated for one embodiment may be used in the same manner or in a similar manner in one or more other embodiments, and / or combined with features of other embodiments or replace features of other embodiments.

[0053] The above-listed embodiments show and describe the basic principles and main features of the utility model, but the utility model is not limited to the above-mentioned embodiments. Any modifications, equivalent changes and modifications made to the utility model by those skilled in the art without making any creative work should fall within the scope of protection of the technical solution of the utility model.

Claims

1. A control mechanism for an excavator safety valve, characterized in that: The control mechanism comprises: A bracket, fixed on the safety valve of the excavator; A handle assembly, comprising an adjustment handle and a handle connector, wherein a first end of the handle connector is hingedly connected to the bracket, and the handle connector is fixedly connected to the adjustment handle, and the adjustment handle can be manipulated to cause the handle connector to rotate relative to the bracket; A transition connecting rod, a first end of which is hingedly connected to the second end of the handle connecting piece, and the second end of the transition connecting rod is used to be hingedly connected to the end of the valve core connecting rod of the excavator safety valve.

2. The control mechanism of the excavator safety valve according to claim 1, characterized in that: The bracket is provided with a first pin shaft, and the first end of the handle connecting member is hingedly connected to the bracket through the first pin shaft.

3. The control mechanism of the excavator safety valve according to claim 2, characterized in that: The first end of the handle connector has a handle sleeve, and the handle sleeve is sleeved outside the first pin shaft.

4. The control mechanism of the excavator safety valve according to claim 3, characterized in that: The control mechanism further comprises a wear-resistant steel sleeve, and the wear-resistant steel sleeve is arranged between the handle sleeve and the first pin shaft.

5. The control mechanism of the excavator safety valve according to claim 1, characterized in that: The second end of the handle connecting member has a second pin shaft, and the second end of the handle connecting member is hingedly connected to the first end of the transition connecting rod through the second pin shaft.

6. The control mechanism of the excavator safety valve according to claim 1, characterized in that: The first end of the valve core connecting rod has a third pin shaft, the second end of the transition connecting rod is hingedly connected to the first end of the valve core connecting rod through the third pin shaft, and the second end of the valve core connecting rod is connected to the valve core of the safety valve.

7. The control mechanism of the excavator safety valve according to claim 3, characterized in that: The included angle between the adjustment handle and the handle connecting piece is 100 degrees to 130 degrees.

8. The control mechanism of the excavator safety valve according to claim 1, characterized in that: The bracket and the transition link are respectively located on two opposite sides of the excavator safety valve.

9. The control mechanism of the excavator safety valve according to claim 7, characterized in that: The axis of the adjusting handle and the axis of the handle sleeve are perpendicular to each other.

10. An excavator, characterized in that: The excavator comprises a control mechanism for an excavator safety valve according to any one of claims 1 to 9.

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