Pin dismounting device of excavator

Abstract

The utility model discloses the field of dismounting tools, and particularly relates to an excavator pin dismounting device which comprises a movable plate and two screws, two first threaded holes matched with the two screws are formed in the left end and the right end of the movable plate in the front-back direction, the two screws penetrate through the two first threaded holes respectively, and a through hole is formed in the middle of the movable plate in the front-back direction. The through hole is connected with a pin dismounting assembly. According to the excavator pin dismounting device, the pin shaft of the excavator can be dismounted more quickly, simply and conveniently, so that the consumption of manpower and material resources is reduced, and the working efficiency is improved. And the loss of the surface of the excavator when a traditional pin dismounting method is used is avoided.

Description

Technical Field

[0001] The utility model relates to the field of disassembly and assembly tools, in particular to a disassembly and pinning device for an excavator. Background Art

[0002] Pins are a type of standardized fasteners, mainly used in large-scale operating equipment such as excavators. Pins can be statically fixed on the excavator body and can also move relative to the connected parts of the excavator. Therefore, pins are one of the indispensable components for the normal operation of excavators. Pins need to be removed during assembly and maintenance of excavators, but the pins and pin holes are generally interference fit, so the pin connection is relatively tight and difficult to be removed.

[0003] Different types of excavators use different pins, and there are no special tools for removing pins, so users can only use traditional tools such as crowbars to remove pins. Traditional tools are difficult to operate, consume a lot of manpower and material resources, have low removal efficiency, and are prone to causing bumps on the excavator and paint loss. Summary of the invention

[0004] The utility model aims to provide an excavator pin removal device with simple operation, high pin removal efficiency and less risk of causing damage to the excavator in view of the above problems.

[0005] In order to achieve the above-mentioned purpose, the utility model discloses an excavator pin removal device, which includes a movable plate and two screw rods. The movable plate has two first threaded holes matching the two screw rods at the left and right ends along the front-to-back direction, and the two screw rods pass through the two first threaded holes respectively. The movable plate has a through hole in the middle along the front-to-back direction, and the through hole is connected with a pin removal assembly. The excavator pin removal device can remove the excavator pin shaft more quickly, is more convenient for users to repair the excavator, and can reduce the damage to the excavator during the disassembly process.

[0006] Preferably, the pin removal assembly comprises a pin removal shaft, the rear end of the pin removal shaft is located at the rear side of the movable plate, and the front end of the pin removal shaft is located at the front side of the movable plate. The pin removal shaft can remove the pin shaft that needs to be removed.

[0007] Preferably, the dismantling pin includes a threaded portion located at its front end for connecting the pin, and the threaded portion can be threadedly connected to the pin to be dismantled, so as to dismantle and replace it.

[0008] Preferably, the pin removal shaft comprises a first bolt and a pin pulling head, the bolt head of the first bolt is located at the rear side of the movable plate, the pin pulling head is located at the front side of the movable plate, a second threaded hole matching the first bolt is provided on the rear side of the pin pulling head, the first bolt passes through the through hole from the back to the front and then connects to the pin pulling head through the second threaded hole. The first bolt can detachably fix the pin removal shaft, making it convenient to install the pin removal shaft with the pin shaft to be removed during the pin removal process.

[0009] Preferably, the pin pulling head is provided with a threaded portion, and the pin pulling head further comprises a connecting portion located behind the threaded portion, the second threaded hole is opened on the rear side of the connecting portion, and the connecting portion connects the pin pulling head to the front side of the movable plate.

[0010] Preferably, a spring washer, a flat washer and a pad are sequentially sleeved on the first bolt between the bolt head and the movable plate from back to front, which can enhance the fastening degree of the first bolt, improve the anti-loosening ability, and protect the first bolt.

[0011] Preferably, the two threaded holes are symmetrically arranged on the movable plate, that is, the two first threaded holes are symmetrically arranged about the center of the through hole.

[0012] Preferably, a hemispherical rotating head is provided at the front end of the screw, the rotating head is connected to a pressure head, a rotating groove matching the rotating head is opened in the pressure head, the rotating head is rotatably connected in the rotating groove, so that the screw can rotate in the pressure head, thereby allowing the movable plate to move backward and disassemble the pin shaft of the excavator.

[0013] Preferably, a pad is provided at the front side of the pressure head, the pad is made of polyurethane material, a countersunk hole is provided at the center of the pad along the front-to-back direction, a blind hole matching the countersunk hole is provided on the front side of the pressure head along the front-to-back direction, and a second bolt passes through the countersunk hole and the blind hole in sequence from front to back. The pad can reduce the bumping of the paint surface of the excavator during the pin removal process, thereby reducing the loss of the excavator, and the polyurethane material has stronger wear resistance, which increases the service life of the pin removal device.

[0014] Preferably, a nut is fixedly connected to the rear end of the screw rod, which can assist the user to rotate the screw rod with a wrench to remove the pin.

[0015] In summary, the beneficial effect of the utility model is that the excavator pin removal device can remove the pin shaft of the excavator more quickly and conveniently, thereby reducing the consumption of manpower and material resources and improving work efficiency. It also avoids the damage to the excavator surface caused by using traditional pin removal methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the overall structure diagram of the utility model;

[0017] Figure 2 yes Figure 1 Middle main view;

[0018] Figure 3 yes Figure 2 Sectional view along AA direction;

[0019] Figure 4 yes Figure 3 Enlarged view of part B.

[0020] In the figure, 1 is the screw rod; 2 is the pressure head; 3 is the spacer; 4 is the spacer plate; 5 is the first bolt; 6 is the pin puller head; 61 is the connecting part; 62 is the threaded part; 7 is the movable plate; 8 is the nut; 9 is the first threaded hole; 10 is the through hole; 11 is the second threaded hole; 12 is the rotating head; 13 is the rotating groove; 14 is the second bolt; 15 is the countersunk hole; 16 is the flat washer; 17 is the spring washer; 18 is the blind hole. DETAILED DESCRIPTION

[0021] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0022] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0023] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0024] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0025] The following is a description of preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0026] Refer to the attached Figure 1-4 A pin removal device for an excavator is characterized in that it includes a movable plate 7 and two screw rods 1, two first threaded holes 9 matching the two screw rods 1 are opened at the left and right ends of the movable plate 7 along the front-to-back direction, the two screw rods 1 pass through the two first threaded holes 9 respectively, a through hole 10 is opened in the middle of the movable plate 7 along the front-to-back direction, and a pin removal assembly is connected to the through hole 10.

[0027] Refer to the attached Figure 1 , 3 , the pin removal assembly includes a pin removal shaft, the rear end of which is located at the rear side of the movable plate 7, and the front end of which is located at the front side of the movable plate 7. The pin removal shaft includes a threaded portion 62 located at its front end for connecting the pin shaft. A screw hole is provided in the middle of the disassembled pin shaft, and the threaded portion 62 is adapted to the second threaded hole of the pin shaft, and the two are connected by threads, so that the entire pin removal device is connected to the disassembled pin shaft. The pin removal shaft includes a first bolt 5 and a pin puller head 6, the bolt head of the first bolt 5 is located at the rear side of the movable plate 7, the pin puller head 6 is located at the front side of the movable plate 7, the rear side surface of the pin puller head 6 is provided with a second threaded hole 11 adapted to the first bolt 5, and the first bolt 5 passes through the through hole 10 from the back to the front and then connects to the pin puller head 6 through the second threaded hole 11. The threaded portion 62 is located on the pin puller head 6, and the pin puller head 6 also includes a connecting portion 61 located behind the threaded portion 62, and the second threaded hole 11 is provided on the rear side surface of the connecting portion 61. The first bolt 5 connects the pin puller 6 to the movable plate 7 by passing through the through hole 10 and the second threaded hole 11. The pin puller is detachably mounted on the movable plate 7. When in use, the first bolt 5 is twisted out of the second threaded hole 11, the pin puller 6 is separated from the movable plate 7, and the pin puller 6 can be connected to the pin that needs to be removed separately.

[0028] Refer to the attached Figure 3 The first bolt 5 is provided with a spring washer 17, a flat washer 16 and a gasket 4 in sequence from back to front between the bolt head and the movable plate 7, which can enhance the fastening degree of the first bolt 5, improve the anti-loosening ability, and protect the first bolt 5 at the same time.

[0029] Refer to the attached Figure 3 , 4, a hemispherical rotating head 12 is provided at the front end of the screw 1, and the rotating head 12 is connected to a pressure head 2, and a rotating groove 13 matching the rotating head 12 is provided in the pressure head 2, and the rotating head 12 is rotatably connected in the rotating groove 13. A small section of the screw 1 with a diameter thinner than that of the rotating head 12 is connected to the rear end of the rotating head 12, and the notch of the rotating groove 13 is adapted to the thinner screw, so the rotating head 12 can be stuck in the pressure head 2. First rotate one side of the screw 1, and the rotating head 12 of the rotated screw 1 rotates in the rotating groove 13 in the pressure head 2, so that the movable plate 7 moves backward. Then rotate the other side of the screw 1, so that the movable plate 7 moves again, and the pin shaft that needs to be disassembled is gradually removed as the movable plate 7 moves.

[0030] Refer to the attached Figure 3 , 4 , a cushion block 3 is arranged at the front side of the pressure head 2, the cushion block 3 is made of polyurethane material, a countersunk hole 15 is provided at the center of the cushion block 3 along the front-to-back direction, a blind hole 18 matching the countersunk hole 15 is provided on the front side of the pressure head 2 along the front-to-back direction, and a second bolt 14 passes through the countersunk hole 15 and the blind hole 18 from front to back in sequence. That is, the pressure head 2 is connected to the cushion block 3 by the second bolt 14. When in use, the cushion block 3 is pressed against the plane where the disassembled pin shaft is located. The cushion block 3 is made of polyurethane material, has strong wear resistance, and can prevent scratches on excavator parts, prevent damage to them, and reduce repair costs.

[0031] Refer to the attached Figure 1 , a nut 8 is fixedly connected to the rear end of the screw rod 1. The screw rod 1 rotates in the first threaded hole 9, thereby driving the relative position of the movable plate 7 to change. When the user uses this excavator pin removal device to remove the pin shaft, the user needs to rotate the screw rod 1, but the pin shaft is tightly connected, so the nut 8 allows the user to use a wrench to assist in rotating the screw rod 1, thereby facilitating the removal of the pin shaft. The two first threaded holes 9 are symmetrically arranged on the movable plate 7, that is, the two first threaded holes 9 are symmetrically arranged about the center of the through hole 10.

[0032] Refer to the attached Figure 1-4 When using this excavator pin removal device, loosen the first bolt 5, connect the pin puller head 6 and the pin shaft to be removed separately, put the excavator pin removal device as a whole into the pin puller head 6, and use the pad 4 and the first bolt 5 to connect and fix the pin puller head 6. At this time, adjust the two screws 1 until the pad 3 contacts the plane where the pin shaft to be removed is located, so that the two screws 1 can be against the excavator body, and the pin shaft is subjected to outward tension. At the same time, use a wrench to tighten the nuts 8 at the rear ends of the two screws 1 so that the movable plate 7 moves backward relative to the two screws 1. Or use a wrench to tighten the nut 8 at the rear end of one side of the screw 1 so that the movable plate 7 moves backward a certain distance relative to this screw 1, and then tighten the nut 8 of the other side of the screw 1 so that the movable plate 7 also moves backward a certain distance relative to the other side of the screw 1. Repeat this process, so that the pin shaft can gradually detach from the excavator and the removal of the pin shaft is completed.

[0033] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. An excavator pin removal device, characterized in that: It comprises a movable plate (7) and two screw rods (1), wherein two first threaded holes (9) matching the two screw rods (1) are formed at the left and right ends of the movable plate (7) along the front-back direction, and the two screw rods (1) pass through the two first threaded holes (9) respectively, and a through hole (10) is formed in the middle of the movable plate (7) along the front-back direction, and a dismantling pin assembly is connected to the through hole (10).

2. The excavator pin removal device according to claim 1, characterized in that: The pin removal assembly comprises a pin removal shaft, the rear end of the pin removal shaft is located at the rear side of the movable plate (7), and the front end of the pin removal shaft is located at the front side of the movable plate (7).

3. The excavator pin removal device according to claim 2, characterized in that: The pin-dismantling shaft comprises a threaded portion (62) located at its front end and used for connecting the pin shaft.

4. The excavator pin removal device according to claim 2, characterized in that: The pin removal shaft comprises a first bolt (5) and a pin pulling head (6), wherein the bolt head of the first bolt (5) is located at the rear side of the movable plate (7), and the pin pulling head (6) is located at the front side of the movable plate (7). A second threaded hole (11) matching the first bolt (5) is provided on the rear side surface of the pin pulling head (6), and the first bolt (5) passes through the through hole (10) from the rear to the front and then connects to the pin pulling head (6) through the second threaded hole (11).

5. The excavator pin removal device according to claim 4, characterized in that: The pin pulling head (6) is provided with a threaded portion (62), and the pin pulling head (6) further comprises a connecting portion (61) located behind the threaded portion (62), and the second threaded hole (11) is formed on a rear side surface of the connecting portion (61).

6. The excavator pin removal device according to claim 4, characterized in that: A spring washer (17), a flat washer (16) and a backing plate (4) are sequentially sleeved on the first bolt (5) between the bolt head and the movable plate (7) from the back to the front.

7. The excavator pin removal device according to claim 1, characterized in that: The two first threaded holes (9) are arranged symmetrically on the movable plate (7).

8. The excavator pin removal device according to claim 1, characterized in that: A hemispherical rotating head (12) is provided at the front end of the screw rod (1); the rotating head (12) is connected to a pressure head (2); a rotating groove (13) matching the rotating head (12) is provided in the pressure head (2); and the rotating head (12) is rotatably connected in the rotating groove (13).

9. The excavator pin removal device according to claim 8, characterized in that: A cushion block (3) is arranged on the front side of the pressure head (2), the cushion block (3) being made of polyurethane material, a countersunk hole (15) is provided at the center of the cushion block (3) along the front-to-back direction, a blind hole (18) matching the countersunk hole (15) is provided on the front side surface of the pressure head (2) along the front-to-back direction, and a second bolt (14) passes through the countersunk hole (15) and the blind hole (18) in sequence from front to back.

10. The excavator pin removal device according to claim 1, characterized in that: A nut (8) is fixedly connected to the rear end of the screw rod (1).

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