Quick-change auxiliary tool structure for micro-excavation

Abstract

A quick-change auxiliary tool structure for micro excavation comprises a shell, two lug plates are arranged on the upper portion of the shell, two connecting shafts are arranged between the two lug plates, and the two lug plates are connected through the connecting shafts; a hook plate is arranged at the rear part of the shell, a tensioning valve block and a spring mechanism are arranged in the shell, the spring mechanism comprises a quick-change pin shaft, and one end of the quick-change pin shaft extends out of the front end of the shell; the tool has the advantages of being convenient to use, simple in structure and firm in connection, the quick-change pin shaft is controlled by spring force to stretch out and clamp assistive devices such as an excavator bucket for normal operation, the quick-change pin shaft is controlled by hydraulic pressure to retract and loosen the excavator bucket, so that the assistive devices such as the excavator bucket are quickly replaced, the efficiency of replacing the assistive devices is improved, convenience and high efficiency are achieved, only one hydraulic oil pipe is needed, the number of oil pipes is reduced, and cost is reduced. The problem that many oil pipes are easy to damage and difficult to maintain is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of excavators, and more specifically to a quick-change auxiliary tool structure for a micro excavator. Background Art

[0002] During the use of the excavator, the bucket and other auxiliary tools need to be replaced frequently due to different working scenarios. The quick-change device can help the operator quickly switch the bucket auxiliary tools. However, most of the existing quick-change devices use hydraulic quick-change cylinder stroke clamp auxiliary tool pins, which are costly and require 2 hydraulic cylinder oil pipes, resulting in many working device oil pipes. The oil pipes are easily damaged during work, and the switching of the bucket auxiliary tools is inconvenient and inefficient. Summary of the invention

[0003] In order to solve the above problems and overcome the deficiencies of the prior art, the utility model provides a quick-change auxiliary tool structure for a micro excavator.

[0004] A quick-change auxiliary tool structure for a micro-excavator includes a shell, two ear plates are arranged on the upper part of the shell, two connecting shafts are arranged between the two ear plates and are connected through the connecting shafts; a hook plate is arranged at the rear part of the shell, a tensioning valve block and a spring mechanism are arranged inside the shell, and the spring mechanism includes a quick-change pin shaft, and one end of the quick-change pin shaft extends from the front end of the shell.

[0005] Furthermore, there are two quick-change pin shafts, and the ends of the two quick-change pin shafts are both provided with inclined surfaces.

[0006] Furthermore, the spring mechanism also includes a connecting plate, an extension rod, a spring and a limit rod. The front of the connecting plate is fixedly connected to the two quick-change pins, the two ends of the rear of the connecting plate are fixedly connected to the extension rod, and the middle of the rear of the connecting plate is fixedly connected to the limit rod. The spring is sleeved on the outside of the two quick-change pins and the extension rod, and one end of the spring is connected to the connecting plate.

[0007] Furthermore, the tensioning valve block includes a main body, both ends of which are provided with pin holes, and the quick-change pin shaft is movably arranged in the pin hole; a valve cavity is provided in the middle part of the interior of the main body, a valve stem is movably arranged inside the valve cavity, a protrusion is provided between the valve stem and the valve cavity, and the valve cavity is divided into valve cavity A and valve cavity B by the protrusion, and hydraulic oil is injected into the valve cavity A or the valve cavity B to change its relative pressure so that the valve stem moves laterally.

[0008] Furthermore, the housing is provided with an oil port A and an oil port B, the oil port A is communicated with the valve cavity A, and the oil port B is communicated with the valve cavity B.

[0009] Furthermore, a sealing ring for sealing is provided between the valve stem and the valve cavity.

[0010] Furthermore, the movable end of the valve stem faces the connecting plate. When the valve stem moves backward and contacts the connecting plate, it drives the spring mechanism to move backward. When the maximum movement range is reached, the inclined surface of the quick-change pin shaft moves completely into the shell.

[0011] Furthermore, a limiting hole is provided in the middle of the rear end of the shell, and the limiting rod is movably arranged inside the limiting hole.

[0012] Furthermore, the tensioning valve block is connected with a hydraulic pipe, and is communicated with the hydraulic system of the micro excavator through the hydraulic pipe.

[0013] Furthermore, there are two hook plates, and the inner sides of the two hook plates are C-shaped.

[0014] The beneficial effects of the utility model are:

[0015] The quick-change auxiliary tool structure of the micro excavator provided by the utility model has the advantages of easy use, simple structure and tight connection. The spring force is used to control the quick-change pin shaft to extend, and the bucket and other auxiliary tools are clamped for normal operation. The quick-change pin shaft is retracted through hydraulic control to release the bucket, so that the bucket and other auxiliary tools can be quickly replaced, which improves the efficiency of replacing auxiliary tools. It is convenient and efficient, and only one hydraulic oil pipe is needed, which reduces the number of oil pipes and avoids the problem that many oil pipes are easy to be damaged and difficult to repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Attached Figure 1 It is a schematic diagram of the front structure of the utility model;

[0017] Attached Figure 2 It is a schematic diagram of the rear structure of the utility model;

[0018] Attached Figure 3 It is a partial enlarged schematic diagram of the spring mechanism of the utility model;

[0019] Attached Figure 4 It is a partial enlarged schematic diagram of the tensioning valve block of the utility model;

[0020] Attached Figure 5 It is a schematic diagram of the cross-sectional structure of the utility model;

[0021] In the accompanying drawings: 1. ear plate, 2. connecting shaft, 3. hook plate, 4. housing, 5. quick-change pin, 51. inclined surface, 6. tensioning valve block, 61. pin hole, 62. valve stem, 63. protrusion, 64. valve chamber A, 65. valve chamber B, 66. oil port A, 67, oil port B, 68. sealing ring, 7. limit hole, 8. connecting plate, 9. spring, 10. extension rod, 11. limit rod. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the present invention more clear, the following will be combined with the appendix of the present invention. Figure 1 ~Attached Figure 5 , the utility model is described in more detail.

[0023] The quick-change auxiliary tool structure of the micro-excavation provided by the utility model comprises a shell 4, two ear plates 1 are arranged on the upper part of the shell 4, two connecting shafts 2 are arranged between the two ear plates 1 and connected through the connecting shaft 2; a hook plate 3 is arranged at the rear part of the shell 4, a tensioning valve block 6 and a spring mechanism are arranged inside the shell 4, and the spring mechanism comprises a quick-change pin shaft 5, one end of which extends from the front end of the shell 4; there are two quick-change pin shafts 5, and the ends of the two quick-change pin shafts 5 are both provided with inclined surfaces 51; the spring mechanism also includes a connecting plate 8, an extension plate 9, and a spring plate 10; a spring plate 11 is provided at the rear part of the shell 4, and a spring plate 12 is provided at the rear part of the shell 4; a spring plate 13 is provided at the rear part of the shell 4, and a spring plate 14 is provided at the rear part of the shell 4; a spring plate 15 is provided at the rear part of the shell 4, and a spring plate 16 is provided at the rear part of the shell 4; a spring plate 17 is provided at the rear part of the shell 4, and a spring plate 18 is provided at the rear part of the shell 4; a spring plate 19 is provided at the rear part of the shell 4, and a spring plate 11 is provided at the rear part of the shell 4; a spring plate 11 is provided at the rear part of the shell 4, and a spring plate 12 is provided at the rear part of the shell 4; a spring plate 13 is provided at the rear part of the shell 4, and a spring plate 14 is provided at the rear part of the shell 4; a spring plate 15 is provided at the rear part of the shell 4, and a spring plate 16 is provided at the rear part of the shell 4; a spring plate 17 is provided at the rear part of the shell 4, and a spring plate Rod 10, spring 9 and limit rod 11, the front of the connecting plate 8 is fixedly connected to the two quick-change pin shafts 5, the two ends of the back of the connecting plate 8 are fixedly connected to the extension rod 10, the middle of the back of the connecting plate 8 is fixedly connected to the limit rod 11, the spring 9 is sleeved on the outside of the two quick-change pin shafts 5 and the extension rod 10, and one end of the spring 9 is connected to the connecting plate 8; the tensioning valve block 6 includes a body, both ends of the body are provided with pin holes 61, and the quick-change pin shaft 5 is movably arranged in the pin hole 61; the middle part of the body is provided with The valve cavity has a valve stem 62 disposed inside the valve cavity in a movable manner, a protrusion 63 is disposed between the valve stem 62 and the valve cavity, and the valve cavity is divided into a valve cavity A64 and a valve cavity B65 by the protrusion 63. Hydraulic oil is injected into the valve cavity A64 or the valve cavity B65 to change its relative pressure so that the valve stem 62 can move laterally; the housing 4 is also provided with an oil port A66 and an oil port B67, the oil port A66 is connected to the valve cavity A64, and the oil port B67 is connected to the valve cavity B65; a sealing ring 68 for sealing is also disposed between the valve stem 62 and the valve cavity ; The movable end of the valve stem 62 faces the connecting plate 8. When the valve stem 62 moves backward and contacts the connecting plate 8, it will drive the spring mechanism to move backward. When it reaches the maximum movement range, the inclined surface 51 of the quick-change pin shaft 5 is completely moved to the inside of the shell 4; a limiting hole 7 is also provided in the middle of the rear end of the shell 4, and the limiting rod 11 is movably arranged inside the limiting hole 7; the tensioning valve block 6 is connected to a hydraulic pipe and is connected to the hydraulic system of the micro-excavation through the hydraulic pipe; there are two hook plates 3 in total, and the inner side surfaces of the two hook plates 3 are C-shaped.

[0024] One embodiment of the present invention is as follows:

[0025] The quick-change auxiliary tool structure of the micro-excavator includes a shell 4, two ear plates 1 are arranged on the upper part of the shell 4, two connecting shafts 2 are arranged between the two ear plates 1 and are connected through the connecting shafts 2; they are connected to the boom of the micro-excavator through the two connecting shafts 2, so that they can be controlled, and a quick connection with the bucket can be achieved through the quick-change auxiliary tool structure.

[0026] The upper part of the bucket is provided with ear plates and bucket connecting plates. A connecting shaft is provided between the ear plates 1, which is connected to the hook plate 3 of the replacement auxiliary structure through the connecting shaft. Two through holes are provided on the bucket connecting plate, which are connected to the through holes through the quick-change pin shaft 5 to achieve a fastened connection.

[0027] A hook plate 3 is provided at the rear of the shell 4, and two hook plates 3 are provided in total. The inner side surfaces of the two hook plates 3 are C-shaped, and the inner side surface of the C-shaped structure can fit tightly with the connecting shaft of the bucket.

[0028] A tensioning valve block 6 and a spring mechanism are provided inside the shell 4. The spring mechanism includes a quick-change pin 5. One end of the quick-change pin 5 extends out from the front end of the shell 4. Two quick-change pins 5 are provided. The two quick-change pins 5 correspond to the two through holes on the bucket. The ends of the two quick-change pins 5 are provided with inclined surfaces 51. When in use, the inclined surfaces 51 face the direction of the bucket, which can achieve quick connection on the one hand and prevent accidental separation on the other hand.

[0029] The spring mechanism also includes a connecting plate 8, an extension rod 10, a spring 9 and a limit rod 11. The front of the connecting plate 8 is fixedly connected to the two quick-change pins 5, the two ends of the back of the connecting plate 8 are fixedly connected to the extension rod 10, and the middle of the back of the connecting plate 8 is fixedly connected to the limit rod 11. The spring 9 is sleeved on the outside of the two quick-change pins 5 and the extension rod 10. One end of the spring 9 is connected to the connecting plate 8, and the other end of the spring 9 is connected to the inner wall of the shell 4. The spring 9 applies a torque to the connecting plate 8 so that the initial state of the quick-change pin 5 is maintained in a state of extending out of the shell 4.

[0030] The tensioning valve block 6 includes a main body and is fixed inside the shell 4 by bolts. Pin holes 61 are provided at both ends inside the main body. The quick-change pin shaft 5 is movably arranged in the pin hole 61 and extends out of the pin hole 61 and from the shell 4 through the end.

[0031] A valve cavity is provided in the middle part of the interior of the main body, and a valve stem 62 is movably provided inside the valve cavity. A protrusion 63 is provided between the valve stem 62 and the valve cavity. The valve cavity is divided into a valve cavity A64 and a valve cavity B65 by the protrusion 63. Hydraulic oil is injected into the valve cavity A64 or the valve cavity B65 to change its relative pressure so that the valve stem 62 can move laterally. An oil port A66 and an oil port B67 are also provided on the shell 4. The oil port A66 is connected to the valve cavity A64, and the oil port B67 is connected to the valve cavity B65.

[0032] When oil flows into the oil port A66 and oil flows out of the oil port B67 at the same time, the volume of the valve chamber A64 increases and the volume of the valve chamber B65 decreases, causing the valve stem 62 to move toward the connecting plate 8. After contacting the connecting plate 8, it pushes the connecting plate 8 to move backward, and at the same time drives the quick-change pin shaft 5 to move toward the inside of the shell 4 until it completely enters the shell 4. At this time, the quick-change auxiliary tool structure can be inserted into the upper part of the bucket. At the same time, a shell slope is provided on one end of the shell 4 close to the quick-change pin shaft 5, and the shell slope is inclined toward the bucket to facilitate its insertion into the upper end of the bucket.

[0033] After that, when oil flows out of the oil port A66 and enters the oil port B67 at the same time, the volume of the valve chamber A64 becomes smaller and the volume of the valve chamber B65 becomes larger, causing the valve stem 62 to move in the opposite direction. Under the action of the spring 9, the connecting plate 8 will move toward the valve stem 62 at the same time, driving the quick-change pin shaft 5 to move toward the outside of the shell 4 until it is stuck in the through hole of the bucket. At this time, the quick-change auxiliary structure can be securely connected with the bucket.

[0034] A sealing ring 68 is also provided between the valve stem 62 and the valve cavity to prevent external impurities from entering the valve cavity.

[0035] A limiting hole 7 is also provided in the middle of the rear end of the shell 4, and a limiting rod 11 is movably provided inside the limiting hole 7, ensuring that the spring 9 structure remains stable and tracks during the overall movement without deviation, thereby reducing overall wear.

[0036] The tensioning valve block 6 is connected with a hydraulic pipe and communicates with the hydraulic system of the mini excavator through the hydraulic pipe, so that the driver can operate it in the cab conveniently.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A quick-change auxiliary tool structure for micro excavation, characterized in that: It comprises a shell, wherein two ear plates are arranged on the upper part of the shell, and two connecting shafts are arranged between the two ear plates and connected through the connecting shafts; a hook plate is arranged at the rear part of the shell, and a tensioning valve block and a spring mechanism are arranged inside the shell, and the spring mechanism comprises a quick-change pin shaft, and one end of the quick-change pin shaft extends out from the front end of the shell.

2. The quick-change auxiliary tool structure for micro excavation according to claim 1 is characterized in that: There are two quick-change pin shafts in total, and the ends of the two quick-change pin shafts are both provided with inclined surfaces.

3. The quick-change auxiliary tool structure for micro excavation according to claim 1 is characterized in that: The spring mechanism also includes a connecting plate, an extension rod, a spring and a limit rod. The front of the connecting plate is fixedly connected to two quick-change pins, the two ends of the rear of the connecting plate are fixedly connected to the extension rod, and the middle of the rear of the connecting plate is fixedly connected to the limit rod. The spring is sleeved on the outside of the two quick-change pins and the extension rod, and one end of the spring is connected to the connecting plate.

4. The quick-change auxiliary tool structure for micro excavation according to claim 3 is characterized in that: The tensioning valve block includes a main body, both ends of which are provided with pin holes, and the quick-change pin shaft is movably arranged in the pin hole; a valve cavity is provided in the middle of the interior of the main body, a valve stem is movably arranged inside the valve cavity, a protrusion is provided between the valve stem and the valve cavity, and the valve cavity is divided into valve cavity A and valve cavity B by the protrusion, and hydraulic oil is injected into the valve cavity A or the valve cavity B to change its relative pressure so that the valve stem can move laterally.

5. The quick-change auxiliary tool structure for micro excavation according to claim 4 is characterized in that: The housing is also provided with an oil port A and an oil port B. The oil port A is communicated with the valve cavity A, and the oil port B is communicated with the valve cavity B.

6. The quick-change auxiliary tool structure for micro excavation according to claim 4, characterized in that: A sealing ring for sealing is also arranged between the valve stem and the valve cavity.

7. The quick-change auxiliary tool structure for micro excavation according to claim 4 is characterized in that: The movable end of the valve stem faces the connecting plate. When the valve stem moves backward and contacts the connecting plate, it drives the spring mechanism to move backward. When the maximum movement range is reached, the inclined surface of the quick-change pin shaft moves completely into the shell.

8. The quick-change auxiliary tool structure for micro excavation according to claim 3 is characterized in that: A limiting hole is also arranged in the middle of the rear end of the shell, and the limiting rod is movably arranged inside the limiting hole.

9. The quick-change auxiliary tool structure for micro excavation according to claim 4, characterized in that: The tensioning valve block is connected with a hydraulic pipe and communicates with the hydraulic system of the micro excavator through the hydraulic pipe.

10. The quick-change auxiliary tool structure for micro excavation according to claim 1, characterized in that: There are two hook plates in total, and the inner sides of the two hook plates are C-shaped.

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