Connecting device facilitating replacement of excavator bucket

By introducing a limiting mechanism and hydraulically driven conduction and pin mechanism into the excavator connection device, the problem of staggered connection holes when the excavator replaces the excavator bucket is solved, automatic alignment and installation is realized, the connection pin deformation is avoided, the replacement process is simplified and the equipment life is extended.

CN222822369UActive Publication Date: 2025-05-02HEFEI SANDAXIN CONSTR MASCH CO LTD
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Patent Information

Application Number
CN202421850269.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-08-01
Publication Date
2025-05-02
Estimated Expiration
2034-08-01

AI Technical Summary

Technical Problem

When the excavator replaces the bucket, the upper hole of the connecting arm and the holes on the bucket are easily staggered, resulting in external force impact when inserting the connecting pin, which can easily cause the connection pin to deform and affect the service life of the equipment.

Method used

A connection device including a bucket, a connecting arm, a connecting pin and a U-frame is designed. Through the limiting mechanism, a conducting mechanism and a pin mechanism, automatic alignment and installation are realized to avoid manually knocking on the connecting pin.

Benefits of technology

Through the limiting mechanism and hydraulically driven conduction and pin mechanism, the coaxial state of the connection hole can be automatically adjusted, ensuring the smooth insertion of the connection pin, avoiding deformation, simplifying the replacement process, and extending the equipment life.

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Abstract

The connecting device comprises the excavator bucket, a connecting arm, a connecting pin and a U-shaped frame, two connecting blocks are arranged at the upper end of the excavator bucket, first connecting holes are formed in the connecting blocks, second connecting holes are formed in the lower end of the connecting arm, and a limiting mechanism used for limiting the U-shaped frame is arranged in the U-shaped frame. A conduction mechanism is arranged on one side of the U-shaped frame, and a plug pin mechanism is arranged on the other side of the U-shaped frame. The first hydraulic rod drives the guide column to be inserted into the first connecting hole, the end face of the guide column is provided with the chamfer, so that the guide column continues to move and is easily inserted into the second connecting hole, the guide column extrudes the inner wall of the second connecting hole to enable the second connecting hole to be coaxial with the first connecting hole, and then the second hydraulic rod drives the ejector block to move. The ejector block drives the connecting pin to be directly inserted into the first connecting hole and the second connecting hole, and replacement of the excavator bucket can be completed without manually knocking the connecting pin.
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Description

Technical Field

[0001] The utility model relates to the technical field of excavators, in particular to a connecting device that is convenient for replacing an excavator bucket. Background Art

[0002] An excavator is a heavy-duty construction machine widely used in the fields of construction, mining, road construction, and farmland irrigation. It uses a bucket to dig materials above or below the surface of the machine and loads these materials into transport vehicles or unloads them to a stockpile. The development of excavators is relatively fast and has become one of the main construction machines in engineering construction.

[0003] When replacing the bucket of an excavator, the old bucket must be removed first, and then the connecting arm must be moved to the top of the new bucket for installation. During the installation process, the upper hole of the connecting arm and the hole on the bucket must be aligned to make them coaxial, and then the connecting pin must be inserted to complete the replacement. However, due to manual installation, the upper hole of the connecting arm and the hole on the bucket are often staggered. If the upper hole of the connecting arm and the hole on the bucket are not coaxial, subsequent installation will be affected. When inserting the connecting pin, it is often necessary to use external force to impact one end of the connecting pin so that the other end of the connecting pin is squeezed into the upper hole of the connecting arm and the hole on the bucket. This method can easily cause the connecting pin to deform and affect the service life of the equipment. Utility Model Content

[0004] The purpose of the utility model is to provide a connecting device which is convenient for replacing a bucket, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the utility model provides the following technical solutions: a connection device for facilitating the replacement of a bucket, comprising a bucket, a connection arm, a connection pin and a U-shaped frame, wherein two connection blocks are provided at the upper end of the bucket, and a first connection hole is provided on the connection block;

[0006] The connecting arm is located between the two connecting blocks, and a second connecting hole is provided at the lower end of the connecting arm;

[0007] A limiting mechanism for limiting the position of the U-shaped frame is provided inside the U-shaped frame;

[0008] A conduction mechanism is provided on one side of the U-shaped frame, and the conduction mechanism includes a first hydraulic rod and a guide column, wherein the first hydraulic rod is fixedly mounted on the outer side of a lower fixed block on one side of the U-shaped frame, and the guide column is arranged at the output end of the first hydraulic rod, and the guide column is coaxially arranged with the first connecting hole;

[0009] A latch mechanism is provided on the other side of the U-shaped frame, and the latch mechanism includes a second hydraulic rod and a top block. The second hydraulic rod is fixedly installed on the outer side of the lower fixed frame on one side of the U-shaped frame, and the top block is arranged at the output end of the second hydraulic rod, and the top block is coaxially arranged with the first connecting hole.

[0010] Preferably, the limiting mechanism comprises a bidirectional screw rod rotatably mounted on the inner side of the U-shaped frame, the bidirectional screw rod is threadedly connected to two bidirectional nut blocks, the two bidirectional nut blocks are fixedly connected to the limiting blocks, and the two limiting blocks are located on both sides of the connecting arm;

[0011] A guide rail is arranged at the inner bottom of the U-shaped frame, and a sliding block matching the guide rail is arranged at one side of the bidirectional nut block, and the sliding block is slidably connected with the guide rail.

[0012] Preferably, a turntable is provided at one end of the bidirectional screw rod, and an eccentric crank is provided on the outer side of the turntable.

[0013] Preferably, a support plate is provided at the lower end of one side of the U-shaped frame, and a rubber pad is provided on the upper side of the support plate.

[0014] Preferably, a chamfer is provided on one side of the guide column close to the first connecting hole.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model can limit the U-shaped frame through a limiting mechanism to ensure that subsequent operations can be carried out stably; the guide column is driven by the first hydraulic rod to be inserted into the first connecting hole, and since the end face of the guide column is provided with a chamfer, the guide column continues to move and is easily inserted into the second connecting hole, and the second connecting hole is squeezed by the guide column so that the second connecting hole can be coaxial with the first connecting hole, and then the second hydraulic rod drives the top block to move so that the top block drives the connecting pin to be directly inserted into the first connecting hole and the second connecting hole, and then the two ends of the connecting pin are limited, and the bucket can be replaced without manually knocking the connecting pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The overall structure of the utility model is shown in FIG. Figure 1 ;

[0018] Figure 2 The overall structure of the utility model is shown in FIG. Figure 2 ;

[0019] Figure 3 It is a side view of the utility model;

[0020] Figure 4 It is an explosion diagram of the utility model;

[0021] Figure 5 It is a schematic diagram of the conduction mechanism and the latch mechanism of the utility model.

[0022] In the figure: 1. bucket; 2. connecting block; 3. first connecting hole; 4. connecting arm; 5. second connecting hole; 6. U-shaped frame; 7. first hydraulic rod; 8. guide column; 9. lower fixed block; 10. second hydraulic rod; 11. top block; 12. lower fixed frame; 13. support plate; 14. two-way screw rod; 15. two-way nut block; 16. limit block; 17. guide rail; 18. slider; 19. turntable; 20. eccentric crank handle; 21. rubber pad; 22. connecting pin. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-5 The utility model provides a technical solution: a connection device for facilitating the replacement of a bucket, comprising a bucket 1, a connection arm 4, a connection pin 22 and a U-shaped frame 6, two connection blocks 2 are provided at the upper end of the bucket 1, and a first connection hole 3 is provided on the connection block 2;

[0025] The connecting arm 4 is located between the two connecting blocks 2, and a second connecting hole 5 is provided at the lower end of the connecting arm 4;

[0026] Among them, the connecting pin 22 is used to connect the connecting arm 4 and the connecting block 2. When replacing the bucket 1, it is necessary to first remove the connecting pin 22 located inside the first connecting hole 3 and the second connecting hole 5, and then move the connecting arm 4 to the top of another bucket 1, place the connecting arm 4 between the two connecting blocks 2, align the second connecting hole 5 with the first connecting hole 3, and then insert the connecting pin 22 into the first connecting hole 3 and the second connecting hole 5 to complete the replacement of the bucket 1.

[0027] A conduction mechanism is provided on one side of the U-shaped frame 6, and the conduction mechanism includes a first hydraulic rod 7 and a guide column 8. The first hydraulic rod 7 is fixedly mounted on the outer side of a lower fixed block 9 on one side of the U-shaped frame 6, and the guide column 8 is arranged at the output end of the first hydraulic rod 7, and the guide column 8 is coaxially arranged with the first connecting hole 3;

[0028] A chamfer is provided on one side of the guide post 8 close to the first connecting hole 3 .

[0029] During the replacement of the bucket 1, when the connecting arm 4 is placed between the two connecting blocks 2, since it is a manual operation, the first connecting hole 3 and the second connecting hole 5 will be eccentric. If the connecting pin 22 is inserted at this time, it is difficult for the connecting pin 22 to be inserted into the first connecting hole 3 and the second connecting hole 5 at the same time. Therefore, the first connecting hole 3 and the second connecting hole 5 need to be adjusted to a coaxial state. At this time, the first hydraulic rod 7 drives the guide column 8 to be inserted into the first connecting hole 3. Since the end face of the guide column 8 is chamfered, the guide column 8 continues to move and is easily inserted into the second connecting hole 5. The guide column 8 squeezes the inner wall of the second connecting hole 5 so that the second connecting hole 5 can be coaxial with the first connecting hole 3.

[0030] A latch mechanism is provided on the other side of the U-shaped frame 6, and the latch mechanism includes a second hydraulic rod 10 and a top block 11. The second hydraulic rod 10 is fixedly mounted on the outer side of a lower fixed frame 12 on one side of the U-shaped frame 6, and the top block 11 is arranged at the output end of the second hydraulic rod 10, and the top block 11 is coaxially arranged with the first connecting hole 3;

[0031] A support plate 13 is disposed at the lower end of one side of the U-shaped frame 6 , and a rubber pad 21 is disposed on the upper side of the support plate 13 .

[0032] After the first connecting hole 3 and the second connecting hole 5 are coaxial, the connecting pin 22 can be inserted into the first connecting hole 3 and the second connecting hole 5 through the latch mechanism. There is no need to manually knock the connecting pin 22. First, the connecting pin 22 is placed on the upper end of the rubber pad 21, and one end of the connecting pin 22 is inserted into the first connecting hole 3. Then, the second hydraulic rod 10 drives the top block 11 to move, so that the top block 11 drives the connecting pin 22 to directly insert into the first connecting hole 3 and the second connecting hole 5. Then, the two ends of the connecting pin 22 are limited to complete the replacement of the bucket 1.

[0033] A limiting mechanism for limiting the position of the U-shaped frame 6 is provided inside the U-shaped frame 6;

[0034] The limiting mechanism includes a bidirectional screw rod 14 rotatably mounted on the inner side of the U-shaped frame 6, the bidirectional screw rod 14 is threadedly connected to two bidirectional nut blocks 15, the two bidirectional nut blocks 15 are fixedly connected to the limiting blocks 16, and the two limiting blocks 16 are located on both sides of the connecting arm 4;

[0035] A guide rail 17 is provided at the bottom of the inner side of the U-shaped frame 6, and a slider 18 matching the guide rail 17 is provided on one side of the bidirectional nut block 15, and the slider 18 is slidably connected to the guide rail 17;

[0036] A turntable 19 is disposed at one end of the bidirectional screw rod 14 , and an eccentric crank 20 is disposed outside the turntable 19 .

[0037] Before replacing the bucket 1, it is necessary to limit the U-shaped frame 6 through a limiting mechanism to ensure that subsequent operations can be carried out stably. First, the two limiting blocks 16 are placed on both sides of the connecting arm 4, and then the eccentric crank 20 is rotated to rotate the bidirectional screw rod 14, so that the two bidirectional nut blocks 15 are close to each other, so that the two limiting blocks 16 are close to each other and fit the connecting arm 4. When the first hydraulic rod 7 and the second hydraulic rod 10 are working subsequently, the U-shaped frame 6 will not move, so that the device can be used stably.

[0038] The working principle and use process of this utility model:

[0039] Before replacing the bucket 1, it is necessary to limit the U-shaped frame 6 through the limiting mechanism to ensure that subsequent operations can be carried out stably. First, the two limiting blocks 16 are placed on both sides of the connecting arm 4, and then the eccentric crank 20 is rotated to rotate the bidirectional screw rod 14, so that the two bidirectional nut blocks 15 are close to each other, so that the two limiting blocks 16 are close to each other and fit the connecting arm 4. When the first hydraulic rod 7 and the second hydraulic rod 10 are working subsequently, the U-shaped frame 6 will not move, so that the device can be used stably; in the process of replacing the bucket 1, when the connecting arm 4 is placed between the two connecting blocks 2, since it is a manual operation, the first connecting hole 3 and the second connecting hole 5 will be eccentric. If the connecting pin 22 is inserted at this time, it is difficult for the connecting pin 22 to be inserted into the first connecting hole 3 and the second connecting hole 5 at the same time. The connecting hole 3 and the second connecting hole 5 are adjusted to a coaxial state. At this time, the first hydraulic rod 7 drives the guide column 8 to be inserted into the first connecting hole 3. Since the end face of the guide column 8 is provided with a chamfer, the guide column 8 continues to move and is easily inserted into the second connecting hole 5. The guide column 8 squeezes the inner wall of the second connecting hole 5 so that the second connecting hole 5 can be coaxial with the first connecting hole 3; the connecting pin 22 can be inserted into the first connecting hole 3 and the second connecting hole 5 through the latch mechanism, and there is no need to manually knock the connecting pin 22. First, the connecting pin 22 is placed on the upper end of the rubber pad 21, and one end of the connecting pin 22 is inserted into the first connecting hole 3. Then, the second hydraulic rod 10 drives the top block 11 to move, so that the top block 11 drives the connecting pin 22 to be directly inserted into the first connecting hole 3 and the second connecting hole 5. Then, the two ends of the connecting pin 22 are limited to complete the replacement of the bucket 1.

[0040] 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 connection device for facilitating replacement of a bucket, comprising a bucket (1), a connection arm (4), a connection pin (22) and a U-shaped frame (6), characterized in that: Two connecting blocks (2) are provided at the upper end of the bucket (1), and a first connecting hole (3) is provided on the connecting block (2); The connecting arm (4) is located between the two connecting blocks (2), and a second connecting hole (5) is provided at the lower end of the connecting arm (4); A limiting mechanism for limiting the position of the U-shaped frame (6) is provided inside the U-shaped frame (6); A conduction mechanism is provided on one side of the U-shaped frame (6), the conduction mechanism comprising a first hydraulic rod (7) and a guide column (8), the first hydraulic rod (7) being fixedly mounted on the outer side of a lower fixed block (9) on one side of the U-shaped frame (6), the guide column (8) being arranged at the output end of the first hydraulic rod (7), and the guide column (8) being coaxially arranged with the first connecting hole (3); A latch mechanism is provided on the other side of the U-shaped frame (6), the latch mechanism comprising a second hydraulic rod (10) and a top block (11), the second hydraulic rod (10) being fixedly mounted on the outside of a lower fixed frame (12) on one side of the U-shaped frame (6), the top block (11) being arranged at the output end of the second hydraulic rod (10), and the top block (11) being coaxially arranged with the first connecting hole (3).

2. A connection device for facilitating replacement of a bucket according to claim 1, characterized in that: The limiting mechanism comprises a bidirectional screw rod (14) rotatably mounted on the inner side of the U-shaped frame (6), the bidirectional screw rod (14) being connected to two bidirectional nut blocks (15) by means of threads, the two bidirectional nut blocks (15) being fixedly connected to the limiting blocks (16), the two limiting blocks (16) being located on both sides of the connecting arm (4); A guide rail (17) is provided at the bottom inner side of the U-shaped frame (6), and a sliding block (18) matching the guide rail (17) is provided at one side of the bidirectional nut block (15), and the sliding block (18) is slidably connected to the guide rail (17).

3. A connection device for facilitating replacement of a bucket according to claim 2, characterized in that: A rotating disk (19) is provided at one end of the bidirectional screw rod (14), and an eccentric crank handle (20) is provided on the outer side of the rotating disk (19).

4. A connection device for facilitating replacement of a bucket according to claim 1, characterized in that: A support plate (13) is provided at the lower end of one side of the U-shaped frame (6), and a rubber pad (21) is provided on the upper side of the support plate (13).

5. The connection device for facilitating the replacement of a bucket according to claim 1, characterized in that: The guide column (8) is provided with a chamfer on one side close to the first connection hole (3).