Quick point assembly tool for small excavator arm

Abstract

This utility model discloses a quick assembly fixture for the stick of a small excavator, belonging to the field of excavator manufacturing technology. It includes a U-shaped base plate, side plates, ear plates, and bushings for assembling the stick. The electric assembly fixture includes a horizontal worktable, a U-shaped base plate, a leveling pad, a backing plate, a leveling post, a positioning support post, a first pressure module, and a second pressure module. A first limiting screw is detachably connected to the positioning support post, capable of passing through the bushing and pressing the bushing down to a tight fit with the positioning support post. An inner support arm that can rotate to the center of the ear plates is also provided on the horizontal worktable. A second limiting screw is detachably connected to the leveling post, capable of passing through the ear holes and inner support arm on the ear plates and pressing down on the ear plates. The purpose of this utility model is to provide a quick assembly fixture for the stick of a small excavator, solving the problems of low accuracy and high operational difficulty in existing stick assembly methods.

Description

Technical Field

[0001] This utility model belongs to the field of excavator manufacturing technology, specifically relating to a quick-assembly tooling for the boom of a small excavator. Background Technology

[0002] In the manufacturing process of mini excavators, the assembly of the boom is a crucial step.

[0003] The boom typically consists of multiple components, such as side plates, bottom plates, lugs, and bushings. Traditional boom assembly methods have several problems. On the one hand, manual positioning and assembly are inefficient, requiring workers to spend a lot of time and energy locating the assembly positions of each component, which is difficult to meet the needs of large-scale production. On the other hand, the precision of manual operation is limited, and differences in skill levels lead to inconsistent boom assembly quality.

[0004] Therefore, there is an urgent need for a simple structure that can quickly and accurately assemble the boom of a small excavator. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a quick-connect tooling for the stick of a small excavator, which solves the problems of low accuracy and high difficulty in operation of the existing stick splicing.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a quick assembly fixture for a small excavator boom, comprising a U-shaped base plate, side plates, ear plates, and bushings for assembling the boom. The electric assembly fixture includes a horizontal worktable and several leveling pads disposed on the horizontal worktable for placing the U-shaped base plate and the side plates on their sides, a backing seat for supporting the side of the U-shaped base plate, leveling columns for supporting the ear plates, a positioning support column for bearing the bushings, a first pressurizing module for pressing the U-shaped base plate down to be tightly fitted with the top side of the leveling pads, and a second pressurizing module for abutting against the U-shaped base plate until its side is tightly fitted with the backing seat. The positioning support column is detachably connected to a first limiting screw that can pass through the bushing and press the bushing down to fit tightly against the positioning support column. The horizontal worktable is also provided with an inner support arm that can rotate to the middle of the ear plate. The equal height pad column is detachably connected to a second limiting screw that can pass through the ear hole on the ear plate and the inner support arm and press down the ear plate.

[0007] Optionally, the first pressurization module includes a column disposed on the horizontal workbench, the top of the column is provided with a long support arm that can rotate to the top of the U-shaped base plate, and a pressing screw that can press down on the U-shaped base plate is threaded through and connected to the long support arm.

[0008] Optionally, a first rubber pad is provided on one end of the pressing screw that abuts against the U-shaped base plate.

[0009] Optionally, the second pressurization module includes a stand disposed on the horizontal workbench, and a transverse push screw is threaded through and connected to the stand. When the transverse push screw is twisted, one end of the transverse push screw can abut against one side of the side plate, and the U-shaped base plate can be pushed to one side by the side plate to fit closely against the backrest.

[0010] Optionally, a second rubber pad is provided on one end of the push screw that abuts against the side plate.

[0011] Optionally, the horizontal worktable is also provided with a limiting rod corresponding to the bushing, and a limiting pin is movably inserted through the limiting rod along the radial direction of the bushing. The limiting pin can be inserted into a positioning hole provided on the outer periphery of the bushing.

[0012] Optionally, the horizontal workbench is provided with several lifting rings.

[0013] Optionally, the horizontal worktable is located on top of the support frame, and the bottom of the support frame is provided with several casters.

[0014] Compared with the prior art, the beneficial effects achieved by this utility model are as follows: the operator can use the equal height pad, the mountain support, the equal height pad column, the positioning support column, etc. as the horizontal positioning reference for the U-shaped base plate, the side plate, the bushing, and the ear plate. The bushing and ear plate can be assembled by the first limit screw, the second limit screw, and the inner support arm. The U-shaped base plate and the side plate can be assembled by the position of the bushing and the ear plate. The first pressure module and the second pressure module can be fixed after the U-shaped base plate and the side plate are assembled. The operation is simple, and the various components that make up the boom can fit tightly together and will not be misaligned or shifted during welding. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the structure of the quick-assembly tooling for the boom of a small excavator in a preferred embodiment of this utility model; Figure 2 This is a top view schematic diagram of the quick-assembly tooling for the boom of a small excavator in a preferred embodiment of this utility model; The components include: 1. U-shaped base plate; 2. Side plate; 3. Ear plate; 4. Bushing; 5. Horizontal worktable; 6. Equal height pad; 7. Backrest; 8. Equal height pad column; 9. Positioning support column; 10. First limit screw; 11. Inner support arm; 12. Second limit screw; 13. Column; 14. Long support arm; 15. Downward pressing screw; 16. First rubber pad; 17. Stand; 18. Horizontal push screw; 19. Second rubber pad; 20. Limiting rod; 21. Limiting pin; 22. Lifting ring; 23. Load-bearing frame; 24. Fuma wheel. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams, which are only used to illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0018] It should be noted that if directional indicators (such as up, down, bottom, top, etc.) are involved in this embodiment, these directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" and "second" may explicitly or implicitly include one or more of that feature. Unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0019] like Figures 1-2As shown, a quick assembly fixture for a small excavator's stick includes a U-shaped base plate 1, side plates 2, ear plates 3, and bushings 4 for assembling the stick. The side plates 2 can block the open end of the U-shaped base plate 1, and the bushings 4 are located at the tail end and back of the U-shaped base plate 1. Two ear plates 3 symmetrically arranged along the U-shaped base plate 1 need to be welded to the front end of the U-shaped base plate 1. The electric assembly fixture in this technical solution includes a horizontal worktable 5 and several leveling pads 6 set on the horizontal worktable 5 for placing the U-shaped base plate 1 and side plates 2 on the side, a backing seat 7 for supporting the side of the U-shaped base plate 1, leveling posts 8 for supporting the ear plates 3, a positioning support post 9 for bearing the bushings 4, a first pressure module for pressing down the U-shaped base plate 1 until it is tightly fitted with the top side of the leveling pad 6, and a second pressure module for pressing against the U-shaped base plate 1 until its side is tightly fitted with the backing seat 7. When operators manually or using lifting equipment move the U-shaped base plate 1, side plates 2, and ear plates 3 onto the horizontal worktable 5, the leveling pads 6, backing pads, and leveling columns 8 can be used as positioning references for the assembly of the boom. Simultaneously, a first limiting screw 10 is detachably connected to the positioning support column 9, capable of passing through the bushing 4 and pressing the bushing 4 down to a tight fit with the positioning support column 9. The first limiting screw 10 and the bushing 4 are clearance-fitted. That is, when the operator operates the first limiting screw 10 to pass through the bushing 4 on the vertically placed positioning support column 9 and tightens the first limiting screw 10 with the positioning support column 9, the position of the bushing 4 on the horizontal worktable 5 can be accurately positioned, and the bushing 4 can also be used as a positioning reference for the U-shaped base plate 1. The horizontal worktable 5 is also equipped with an inner support arm 11 that can rotate to the center of the ear plates 3. That is, after one ear plate 3 is horizontally positioned by the leveling post 8, the inner support arm 11 can be rotated to be above that ear plate 3, and then the other ear plate 3 can be placed on the inner support arm 11, which determines the horizontal position of the ear plate 3. Simultaneously, the leveling post 8 is detachably connected to a second limiting screw 12 that passes through the ear holes on the ear plates 3 and the inner support arm 11, and can press down on the ear plates 3. The second limiting screw 12 has a clearance fit with the ear holes and the inner support arm 11, and there are at least two ear holes on the ear plates 3. After the second limiting screw 12 passes through the ear plates 3 and the inner support arm 11 and is threadedly fastened to the leveling post 8, the positions of the two ear plates 3 relative to the leveling post 8 and the relative positions between the two ear plates 3 can be determined.

[0020] The above, such as Figure 1 As shown, the first pressurization module includes a column 13 set on a horizontal workbench 5. The top of the column 13 is provided with a long support arm 14 that can rotate to the top of the U-shaped base plate 1. A pressing screw 15 that can press down on the U-shaped base plate 1 is threaded through and connected to the long support arm 14. That is, by twisting the pressing screw 15, one end of the pressing screw 15 can be moved closer to the U-shaped base plate 1 until the bottom end of the pressing screw 15 abuts against the surface of the U-shaped base plate 1, thereby fixing the position of the U-shaped base plate 1.

[0021] It should be noted that in this technical solution, a first rubber pad 16 is provided on the end of the pressing screw 15 that abuts against the U-shaped base plate 1, so as to avoid direct rigid contact between the end of the pressing screw 15 and the surface of the U-shaped base plate 1, and to increase the friction and improve the stability of the position of the U-shaped base plate 1.

[0022] The above, such as Figure 2 As shown, the second pressurization module includes a stand 17 mounted on a horizontal workbench 5, with a transverse push screw 18 threaded through and connected to the stand 17. When the transverse push screw 18 is twisted, one end of the transverse push screw 18 can abut against one side of the side plate 2, and can push the U-shaped base plate 1 to one side of the side plate 2 to fit tightly against the backrest 7.

[0023] It should be noted that a second rubber pad 19 is provided on the end of the horizontal push screw 18 that abuts against the side plate 2, so as to avoid direct rigid contact between the end of the horizontal push screw 18 and the surface of the side plate 2, and to improve the stability of the side plate 2 in position fixation and prevent the side plate 2 from sliding.

[0024] In this embodiment, a limiting rod 20 corresponding to the bushing 4 is also provided on the horizontal worktable 5. A limiting pin 21 is movably inserted through the limiting rod 20 along the radial direction of the bushing 4. The limiting pin 21 can be inserted into the positioning hole provided on the outer periphery of the bushing 4 to prevent the bushing 4 from rotating axially.

[0025] Furthermore, such as Figure 1 As shown, the horizontal worktable 5 is equipped with several lifting rings 22 to facilitate the transfer of the assembled boom to the welding area in conjunction with lifting equipment. Meanwhile, the horizontal worktable 5 is positioned on top of the support frame 23, and the bottom of the support frame 23 is equipped with several casters 24 to allow operators to adjust the position of the entire device as needed.

[0026] Working principle: The operator can use the leveling pad 6, the mountain support 7, the leveling pad column 8, and the positioning support column 9 as the horizontal positioning reference for the U-shaped base plate 1, the side plate 2, the bushing 4, and the ear plate 3. The bushing 4 and the ear plate 3 can be assembled by the first limiting screw 10, the second limiting screw 12, and the inner support arm 11. The U-shaped base plate 1 and the side plate 2 can be assembled by the position of the bushing 4 and the ear plate 3. The first pressurizing module and the second pressurizing module can be fixed after the U-shaped base plate 1 and the side plate 2 have been assembled, thereby completing the assembly operation of the entire boom.

[0027] Based on the preferred embodiments of this utility model described above, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A quick assembly fixture for a small excavator's boom, comprising a U-shaped base plate (1), side plates (2), ear plates (3), and bushings (4) for assembling the boom, characterized in that: The assembly fixture includes a horizontal workbench (5) and several leveling pads (6) set on the horizontal workbench (5) for placing the U-shaped base plate (1) and the side plate (2) on the side, a backing seat (7) for supporting the side of the U-shaped base plate (1), a leveling pad column (8) for supporting the ear plate (3), a positioning support column (9) for carrying the bushing (4), a first pressurizing module for pressing down the U-shaped base plate (1) to be tightly fitted with the top side of the leveling pad (6), and a second pressurizing module for abutting against the U-shaped base plate (1) to be tightly fitted with the backing seat (7) on its side; The positioning support column (9) is detachably connected to a first limiting screw (10) that can pass through the bushing (4) and press down the bushing (4) to fit tightly against the positioning support column (9). The horizontal worktable (5) is also provided with an inner support arm (11) that can rotate to the middle of the ear plate (3). The equal height pad column (8) is detachably connected to a second limiting screw (12) that can pass through the ear hole on the ear plate (3) and the inner support arm (11) and press down the ear plate (3).

2. The quick-assembly tooling for the boom of a small excavator according to claim 1, characterized in that: The first pressurization module includes a column (13) disposed on the horizontal workbench (5). The top of the column (13) is provided with a long support arm (14) that can rotate to the top of the U-shaped base plate (1). A pressing screw (15) that can press down on the U-shaped base plate (1) is threaded through and connected to the long support arm (14).

3. The quick-assembly tooling for the boom of a small excavator according to claim 2, characterized in that: A first rubber pad (16) is provided on one end of the pressing screw (15) that abuts against the U-shaped base plate (1).

4. The quick-assembly tooling for the boom of a small excavator according to claim 1, characterized in that: The second pressurization module includes a stand (17) disposed on the horizontal worktable (5), and a horizontal push screw (18) is threaded through and connected to the stand (17). When the transverse push screw (18) is twisted, one end of the transverse push screw (18) can abut against one side of the side plate (2) and can push the U-shaped base plate (1) to one side of the side plate (2) to fit closely against the backrest (7).

5. The quick-assembly tooling for the boom of a small excavator according to claim 4, characterized in that: A second rubber pad (19) is provided on one end of the push screw (18) that abuts against the side plate (2).

6. The quick-assembly tooling for the boom of a small excavator according to claim 1, characterized in that: The horizontal worktable (5) is also provided with a limiting rod (20) corresponding to the bushing (4). A limiting pin (21) is movably inserted on the limiting rod (20) along the radial direction of the bushing (4). The limiting pin (21) can be inserted into the positioning hole provided on the outer periphery of the bushing (4).

7. The quick-assembly tooling for the boom of a small excavator according to claim 1, characterized in that: The horizontal workbench (5) is equipped with several lifting rings (22).

8. The quick-assembly tooling for the boom of a small excavator according to claim 1, characterized in that: The horizontal workbench (5) is located on the top of the support frame (23), and the bottom of the support frame (23) is provided with several ferrules (24).

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