Clamping and positioning tool for assembling connecting rod of excavator

Abstract

The utility model provides a clamping and positioning tool for excavator connecting rod assembling, and relates to the technical field of excavator connecting rod assembling and positioning. According to the excavator connecting rod clamping and positioning device, a three-section pipe, a transverse plate, a vertical plate, an arc plate and a single-section pipe in excavator connecting rod component parts can be sequentially clamped and positioned, the three-section pipe, the transverse plate, the vertical plate, the arc plate and the single-section pipe are tightly attached after positioning is completed, and meanwhile the three-section pipe and the single-section pipe can be prevented from rolling in the follow-up welding process; therefore, after the parts are spliced and positioned, the positions are firm and do not deviate, the excavator connecting rod splicing and positioning tool is good in effect, the unloading process after subsequent welding is also convenient and fast, and the splicing and positioning process of the excavator connecting rod is optimized.

Description

Technical Field

[0001] This utility model relates to the field of excavator link assembly and positioning technology, and more specifically, to a clamping and positioning fixture for excavator link assembly. Background Technology

[0002] The excavator's connecting rod and rocker arm form a four-bar linkage through a hinge point. The rocker arm (or rocker stick) acts as the driving component, connected to the connecting rod via a pin. When the hydraulic cylinder drives the rocker arm to rotate, the connecting rod converts the rocker arm's swing into precise angle changes or stroke amplification of the bucket.

[0003] The excavator connecting rod consists of a three-section tube, a horizontal plate, two vertical plates, an arc plate, and two single-section tubes (as per the instruction manual). Figure 2 As shown in the figure, the vertical plate has first arc grooves on both sides that fit the surfaces of the three-section pipe and the single-section pipe, respectively. The horizontal plate has a second arc groove that fits the surface of the arc plate. The arc plate has symmetrical third arc grooves that fit the surfaces of the two single-section pipes. At the same time, the three-section pipe and the single-section pipe each have an oil injection hole that connects to their interior. Currently, it is necessary to weld the three-section pipe, the horizontal plate, the vertical plate, the arc plate and the single-section pipe into a whole structure. Before welding, it is necessary to define the position of the above-mentioned components. However, there is currently a lack of tooling for assembling and positioning the above-mentioned connecting rod components. Utility Model Content

[0004] The purpose of this utility model is to solve the problems mentioned in the background art, and then to propose a clamping and positioning tool for assembling excavator connecting rods.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A clamping and positioning fixture for assembling excavator connecting rods includes an mounting frame, a three-section pipe support frame, a first tilting frame, a three-section pipe clamping and positioning assembly, a three-section pipe anti-rolling assembly, a horizontal plate raising roller, a vertical plate raising seat, a horizontal and vertical plate clamping and positioning assembly, an arc plate raising seat, a single-section pipe support frame, a single-section pipe clamping and positioning assembly, a translation assembly, a second tilting frame, and a single-section pipe anti-rolling assembly.

[0007] The three-section pipe support frame, the first flipping frame, and the three-section pipe clamping and positioning assembly are all mounted on the mounting frame.

[0008] The three-section pipe anti-rolling component is mounted on the first flipping frame and cooperates with the first oil injection hole opened on the three-section pipe;

[0009] Multiple horizontal plate raising rollers, multiple vertical plate raising seats, and horizontal and vertical plate clamping and positioning components are all set on the mounting frame to ensure that the three are tightly spliced ​​and fitted after the vertical and horizontal plates are successively defined in position.

[0010] The arc plate elevation seat and the two single-section pipe support frames are all installed on the mounting frame;

[0011] Two sets of single-section pipe clamping and positioning components and translation components are all mounted on the mounting frame, and one set of single-section pipe clamping and positioning components is connected to the translation component so that the connecting rod can be removed as a whole after welding.

[0012] Two second flip frames are mounted on the mounting frame, and the second flip frames are equipped with single-section pipe anti-rolling components so that after the two single-section pipes are respectively limited by the single-section pipe clamping and positioning components, the two sets of single-section pipe rolling components are respectively inserted into the second oil injection holes of the two single-section pipes.

[0013] Furthermore, the three-section pipe clamping and positioning assembly includes a limiting plate, a fixing base, a first screw, a rotating rod, and a clamping block.

[0014] Both the limit plate and the fixing seat are fixed on the mounting frame;

[0015] The first screw is threadedly connected to the fixed seat, and one end of the first screw is provided with a rotating rod, while the other end of the first screw is provided with a clamping block with a circular main body.

[0016] Furthermore, the three-section pipe anti-rolling assembly includes a mounting plate, a housing, a T-slot, a pull roller, a fixed disc, a spring, an insert roller, and a clamping roller.

[0017] The mounting plate is fixed on the first tilting frame, and the mounting plate is fixed with a housing;

[0018] T-slots are formed on the housing;

[0019] The pull roller is slidably fitted with the housing, and a fixed plate is fixedly provided at one end of the pull roller;

[0020] A spring sleeved on the outside of the pull roller is fixed between the inner wall of the housing and the fixed plate;

[0021] One end of the insertion roller is fixedly connected to the fixed plate, and the other end of the insertion roller passes through the through hole opened on the mounting plate and matches the first oil injection hole;

[0022] The clamping roller is fixed on the inserting roller and moves along the T-slot so that when the clamping roller is in the vertical groove of the T-slot, the end of the inserting roller is inserted into the first oil injection hole, and when the clamping roller is in the horizontal groove of the T-slot, the end of the inserting roller is disengaged from the first oil injection hole.

[0023] Furthermore, the horizontal and vertical plate clamping and positioning assembly includes a fixed plate, a lead screw assembly, and a movable plate.

[0024] The fixing plate is fixed on the mounting bracket;

[0025] The lead screw assembly is fixed on the mounting bracket and is connected to a movable plate that is flush with the top of the fixed plate.

[0026] Furthermore, the single-section tube clamping and positioning assembly includes a connecting frame, a first contact circular plate, a second contact circular plate, a boss, and a second screw.

[0027] The first contact circular plate is fixed on the connecting frame, and a boss that fits against the inner wall of one side of the single-section pipe is fixed on the first contact circular plate.

[0028] The second contact circular plate is also fixed with a boss that fits against the inner wall of the other side of the single-section pipe;

[0029] The second screw passes sequentially through the connecting frame, the first contact circular plate, the boss on the first contact circular plate, the boss on the second contact circular plate, and the second contact circular plate, and the second screw is threadedly connected to the inside of the second contact circular plate.

[0030] Furthermore, the translation component also adopts a lead screw component, and the translation component is fixedly connected to the connecting frame in one set of single-section pipe clamping and positioning components, while the connecting frame in the other set of single-section pipe clamping and positioning components is fixedly connected to the mounting frame.

[0031] Furthermore, the second flipping frame and the first flipping frame have the same structure. The first flipping frame includes a mounting base and a flipping rod. The mounting base is fixed on the mounting frame and the flipping rod is rotatably connected to the mounting base. The mounting plate of the three-section tube anti-rolling assembly is fixed on the flipping rod.

[0032] Furthermore, the structure of the single-section tube anti-rolling assembly is completely identical to that of the three-section tube anti-rolling assembly.

[0033] Furthermore, the main body shape of the three-section pipe support frame and the single-section pipe support frame is V-shaped, and wear-resistant blocks are symmetrically arranged on the three-section pipe support frame and the single-section pipe support frame.

[0034] Furthermore, lifting rings are provided at each of the four corners of the mounting bracket.

[0035] Compared with the prior art, the beneficial effects of this utility model are:

[0036] Compared to existing technologies, this application can sequentially clamp and position the three-section pipe, horizontal plate, vertical plate, arc plate, and single-section pipe in the components of the excavator connecting rod, and after positioning, the components are tightly fitted together. At the same time, it can also prevent the three-section pipe and single-section pipe from rolling during subsequent welding. As a result, after the components are spliced ​​and positioned, their positions are firm and will not shift. The excavator connecting rod assembly and positioning tooling has a good effect, and the unloading process after subsequent welding is also more convenient. Thus, the assembly and positioning process of the excavator connecting rod is optimized. Attached Figure Description

[0037] Figure 1 This is a schematic diagram showing the fit between this tooling and the various components of the connecting rod;

[0038] Figure 2 Schematic diagram of each component of the connecting rod;

[0039] Figure 3 This is a schematic diagram of the overall structure of this tooling;

[0040] Figure 4 This is a schematic diagram of the three-section anti-rolling assembly structure;

[0041] Figure label:

[0042] 1. Mounting frame; 2. Three-section pipe support frame; 21. Wear-resistant block; 3. First flipping frame; 31. Mounting base; 32. Flipping rod; 4. Three-section pipe clamping and positioning assembly; 41. Limiting plate; 42. Fixed base; 43. First screw; 44. Tightening block; 5. Three-section pipe anti-rolling assembly; 51. Mounting plate; 52. Housing; 521. T-slot; 53. Pull roller; 54. Fixed plate; 55. Insert roller; 56. Clamping roller; 6. Horizontal plate raising roller; 7. 8. Vertical plate elevation seat; 9. Horizontal and vertical plate clamping and positioning assembly; 10. Fixed plate; 11. Screw assembly; 12. Movable plate; 13. Arc plate elevation seat; 14. Single-section pipe support frame; 15. Single-section pipe clamping and positioning assembly; 16. Connecting frame; 17. First contact circular plate; 18. Second contact circular plate; 19. Boss; 10. Second screw; 10. Translation assembly; 11. Second flipping frame; 12. Single-section pipe anti-rolling assembly; 13. Lifting ring. Detailed Implementation

[0043] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model. The present utility model will be further described with reference to the accompanying drawings and embodiments:

[0044] like Figures 1 to 4 As shown, a clamping and positioning fixture for assembling excavator connecting rods includes an mounting frame 1, a three-section pipe support frame 2, a first tilting frame 3, a three-section pipe clamping and positioning assembly 4, a three-section pipe anti-rolling assembly 5, a horizontal plate raising roller 6, a vertical plate raising seat 7, a horizontal and vertical plate clamping and positioning assembly 8, an arc plate raising seat 9, a single-section pipe support frame 10, a single-section pipe clamping and positioning assembly 11, a translation assembly 12, a second tilting frame 13, and a single-section pipe anti-rolling assembly 14.

[0045] The three-section pipe support frame 2, the first flipping frame 3, and the three-section pipe clamping and positioning assembly 4 are all mounted on the mounting frame 1;

[0046] The three-section pipe anti-rolling component 5 is mounted on the first flipping frame 3 and cooperates with the first oil injection hole opened on the three-section pipe;

[0047] Multiple horizontal plate raising rollers 6, multiple vertical plate raising seats 7, and horizontal and vertical plate clamping and positioning components 8 are all set on the mounting frame 1 so that the three are tightly spliced ​​and attached after the vertical plate and horizontal plate are successively defined in position.

[0048] The arc plate elevation seat 9 and the two single-section pipe support frames 10 are both installed on the mounting frame 1;

[0049] Two sets of single-section pipe clamping and positioning components 11 and translation components 12 are all mounted on the mounting frame 1, and one set of single-section pipe clamping and positioning components 11 is connected to the translation component 12 so that the connecting rod can be removed as a whole after welding.

[0050] Two second flip frames 13 are mounted on the mounting frame 1, and the second flip frames 13 are equipped with single-section pipe anti-rolling components 14 so that after the two single-section pipes are respectively limited by the single-section pipe clamping and positioning components 11, the two sets of single-section pipe rolling components are respectively inserted into the second oil injection holes of the two single-section pipes.

[0051] Specific implementation of the embodiments of this utility model, such as Figure 1 and Figure 3 As shown, the three-section pipe clamping and positioning assembly 4 includes a limiting plate 41, a fixing base 42, a first screw 43, a rotating rod (not shown in the figure), and a clamping block 44.

[0052] The limiting plate 41 and the fixing seat 42 are both fixed on the mounting bracket 1;

[0053] The first screw 43 is threadedly connected to the fixed base 42, and one end of the first screw 43 is provided with a rotating rod, while the other end of the first screw 43 is provided with a clamping block 44 with a circular main body shape.

[0054] Specific implementation of the embodiments of this utility model, such as Figure 1 and Figure 4 As shown, the three-section pipe anti-rolling assembly 5 includes a mounting plate 51, a housing 52, a T-slot 521, a pull roller 53, a fixing plate 54, a spring, an insert roller 55, and a clamping roller 56.

[0055] Mounting plate 51 is fixedly mounted on the first tilting frame 3, and housing 52 is fixedly mounted on mounting plate 51;

[0056] T-slot 521 is formed on housing 52;

[0057] The pull roller 53 is slidably engaged with the housing 52, and a fixing plate 54 is fixedly provided at one end of the pull roller 53;

[0058] A spring (not shown in the figure) sleeved on the outside of the pull roller 53 is fixed between the inner wall of the housing 52 and the fixed plate 54;

[0059] One end of the insert roller 55 is fixedly connected to the fixed plate 54, and the other end of the insert roller 55 passes through the through hole opened on the mounting plate 51 and matches the first oil injection hole.

[0060] The clamping roller 56 is fixed on the inserting roller 55 and moves along the T-slot 521 so that when the clamping roller 56 is in the vertical groove of the T-slot 521, the end of the inserting roller 55 is inserted into the first oil injection hole, and when the clamping roller 56 is in the horizontal groove of the T-slot 521, the end of the inserting roller 55 is disengaged from the first oil injection hole.

[0061] Specific implementation of the embodiments of this utility model, such as Figure 1 and Figure 3 As shown, the horizontal and vertical plate clamping and positioning assembly 8 includes a fixed plate 81, a lead screw assembly 82, and a movable plate 83.

[0062] The fixing plate 81 is fixed on the mounting bracket 1;

[0063] The lead screw assembly 82 is fixed on the mounting bracket 1 and is connected to a movable plate 83 that is flush with the top of the fixed plate 81.

[0064] Specific implementation of the embodiments of this utility model, such as Figure 1 and Figure 3 As shown, the single-section pipe clamping and positioning assembly 11 includes a connecting frame 111, a first contact circular plate 112, a second contact circular plate 113, a boss 114, and a second screw 115.

[0065] The first contact circular plate 112 is fixed on the connecting frame 111, and the first contact circular plate 112 is fixed with a boss 114 that fits against the inner wall of one side of the single-section pipe.

[0066] The second contact circular plate 113 is also fixed with a boss 114 that fits against the inner wall of the other side of the single-section pipe;

[0067] The second screw 115 passes sequentially through the connecting frame 111, the first contact circular plate 112, the boss 114 on the first contact circular plate 112, the boss 114 on the second contact circular plate 113, and the second contact circular plate 113. The second screw 115 is internally threaded to the second contact circular plate 113 (one end of the second screw 115 is also fixed with a rotating rod for easy rotation).

[0068] Further refinements of the above embodiments, such as... Figure 1 and Figure 3As shown, the translation component 12 also adopts a lead screw assembly, and the translation component 12 is fixedly connected to the connecting frame 111 in one set of single-section pipe clamping and positioning components 11, while the connecting frame 111 in the other set of single-section pipe clamping and positioning components 11 is fixedly connected to the mounting frame 1.

[0069] Specific implementation of the embodiments of this utility model, such as Figure 1 and Figure 3 As shown, the second flipping frame 13 and the first flipping frame 3 have the same structure. The first flipping frame 3 includes a mounting base 31 and a flipping rod 32. The mounting base 31 is fixed on the mounting frame 1 and the flipping rod 32 is rotatably connected to the mounting base 31. The mounting plate 51 of the three-section pipe anti-rolling assembly 5 is fixed on the flipping rod 32.

[0070] Specific implementation of the embodiments of this utility model, such as Figure 1 and Figure 3 As shown, the structure of the single-section anti-rolling assembly 14 is completely the same as that of the three-section anti-rolling assembly 5.

[0071] To facilitate the maintenance of the three-section pipe support frame 2 and the single-section pipe support frame 10 and reduce the complexity of replacement after damage, the above-described embodiments are further optimized, such as... Figure 1 As shown, the main body shape of the three-section pipe support frame 2 and the single-section pipe support frame 10 is V-shaped, and wear-resistant blocks 21 are symmetrically arranged on the three-section pipe support frame 2 and the single-section pipe support frame 10.

[0072] To facilitate the transfer of this tooling, the above embodiment is further optimized by providing lifting rings 15 at the four corners of the mounting frame 1. The lifting rings 15, together with the overhead crane, can achieve automatic transfer. The overhead crane is existing technology and its working principle is not described and is not shown in the figure.

[0073] The working process of this utility model is as follows:

[0074] First, place the three-section tube on the three-section tube support frame 2. At this time, the surface of the three-section tube will be in contact with the wear-resistant block 21, and the end face of the three-section tube will be in contact with the limiting plate 41. Then, rotate the three-section tube so that the first oil injection hole is directly aligned with the inserted roller 55 in the flipped-down three-section tube anti-rolling assembly 5. Then, the front and rear positions of the three-section tube are limited by the three-section tube clamping and positioning assembly 4. Then, the pull roller 53 can be rotated. After the pull roller 53 rotates, the clamping roller 56 will disengage from the horizontal groove of the T-slot 521. Then, when the clamping roller 56 moves into the vertical groove of the T-slot 521, release the spring, and the spring will return to its original shape. This allows the insertion roller 55 to enter the first oil injection hole to prevent the three sections of the tube from rolling during subsequent welding. At this point, the position of the three sections of the tube is clamped and defined. (Similarly, when the welding is completed and the insertion roller 55 needs to be removed from the first oil injection hole, first pull the pull roller 53. At this time, the spring is compressed and the insertion roller 55 is removed from the first oil injection hole. When the clamping roller 56 is pulled and raised to the horizontal groove side of the T-slot 521, then the pull roller 53 is rotated so that the clamping roller 56 moves to the defined position in the horizontal groove of the T-slot 521. At this time, even if you release the hand, the insertion roller 55 will not enter the first oil injection hole.)

[0075] First, a vertical plate is placed using two vertical plate shims 7 near the fixed plate 81, with the first arc groove in contact with the three-section tube and the vertical plate in contact with the surface of the fixed plate 81. Then, a horizontal plate is placed using a horizontal plate shim roller 6, with the horizontal plate in contact with the vertical plate. Next, another vertical plate is placed using two vertical plate shims 7 away from the fixed plate 81, with the first arc groove on the other vertical plate in contact with the three-section tube and the vertical plate in contact with the horizontal plate. Finally, the movable plate 83 is brought into contact with one of the vertical plates by the screw assembly 82. With the help of the fixed plate 81, the position between the two vertical plates and the horizontal plate is defined. At this point, the position of the horizontal plate and the vertical plate is clamped and defined.

[0076] Then, the arc plate is placed using the arc plate shim 9, ensuring it fits against the second arc groove. After the arc plate is placed, the second contact plates of the two single-section tube clamping and positioning assemblies 11 are disassembled one after the other (first disassemble the second contact plate of the fixed single-section tube clamping and positioning assembly 11; at this time, the other single-section tube clamping and positioning assembly 11 is moved away by the translation assembly 12, thus not obstructing the insertion of a single-section tube into the fixed single-section tube clamping and positioning assembly 11). Specifically, the single-section tube is passed through the open end of the second screw 115, ensuring the inner wall of the single-section tube fits against the protrusion 114 on the first contact plate. The second contact plate is reconnected to the second screw 115. After installation, the boss 114 of the second contact plate is also in contact with the inner wall of the single tube. Then the single tube is rotated so that the second oil injection hole is directly opposite the roller 55 in the flipped-down single tube anti-rolling assembly 14. Then the single tube clamping and positioning assembly 11 limits the front and rear position of the single tube and the single tube contacts the wear-resistant block 21 on the single tube support frame 10. The roller 55 in the single tube anti-rolling assembly 14 is accurately inserted into the second oil injection hole and the surface of the single tube is in contact with the third arc groove. The operating principle of the roller 55 has been described above and will not be repeated here.

[0077] Similarly, following the above process, another single-section tube can be installed in another set of movable single-section tube clamping and positioning components 11. After installation, it is not locked at this time. Then, the position of the single-section tube clamping and positioning component 11 can be adjusted by the translation component 12. When the second oil injection hole on the movable single-section tube is also accurately aligned with the insertion roller 55 in the other set of single-section tube anti-rolling components 14, the translation can be stopped and the anti-rolling can be locked. At this time, the single-section tube is also in contact with the third arc groove. Through the action of the two single-section tubes, the arc plate and the second arc groove can be tightly fitted. Then, the welding process between the above-mentioned components can be started.

[0078] After the components of the connecting rod are securely welded together, the clamps on the three sections of pipe, the roll limiter, and the horizontal and vertical plates are released in sequence. Finally, the second contact plates on the two sets of single-section pipe clamping and positioning assemblies 11 are removed. Then, by operating the translation assembly 12, the second screw 115 in the movable single-section pipe clamping and positioning assembly 11 is disengaged from one single-section pipe and moved to a position away from the single-section pipe. Then, the entire connecting rod is moved to the left so that the remaining single-section pipe is also disengaged from the second screw 115 in the other set of single-section pipe clamping and positioning assemblies 11. Then, the entire connecting rod can be transferred and unloaded.

[0079] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A clamping and positioning fixture for assembling excavator connecting rods, characterized in that, The components include a mounting frame (1), a three-section pipe support frame (2), a first flipping frame (3), a three-section pipe clamping and positioning assembly (4), a three-section pipe anti-rolling assembly (5), a horizontal plate raising roller (6), a vertical plate raising seat (7), a horizontal and vertical plate clamping and positioning assembly (8), an arc plate raising seat (9), a single-section pipe support frame (10), a single-section pipe clamping and positioning assembly (11), a translation assembly (12), a second flipping frame (13), and a single-section pipe anti-rolling assembly (14). The three-section pipe support frame (2), the first flipping frame (3), and the three-section pipe clamping and positioning assembly (4) are all mounted on the mounting frame (1); The three-section pipe anti-rolling component (5) is mounted on the first flipping frame (3) and is matched with the first oil injection hole opened on the three-section pipe; Multiple horizontal plate raising rollers (6), multiple vertical plate raising seats (7), and horizontal and vertical plate clamping and positioning components (8) are all set on the mounting frame (1) so that the three are tightly spliced ​​and attached after the vertical plate and horizontal plate are defined in sequence; The arc plate elevation seat (9) and the two single-section pipe support frames (10) are both set on the mounting frame (1); Two sets of single-section pipe clamping and positioning components (11) and translation components (12) are all mounted on the mounting frame (1), and one set of single-section pipe clamping and positioning components (11) is connected to the translation component (12) so that the connecting rod can be removed as a whole after welding. Two second flip frames (13) are set on the mounting frame (1) and the second flip frames (13) are provided with single-section pipe anti-rolling components (14) so ​​that after the two single-section pipes are respectively limited by the single-section pipe clamping and positioning components (11), the two sets of single-section pipe rolling components are respectively inserted into the second oil injection holes of the two single-section pipes.

2. The clamping and positioning fixture for assembling excavator connecting rods according to claim 1, characterized in that, The three-section pipe clamping and positioning assembly (4) includes a limiting plate (41), a fixing base (42), a first screw (43), a rotating rod, and a clamping block (44). The limiting plate (41) and the fixing seat (42) are both fixed on the mounting bracket (1); The first screw (43) is threadedly connected to the fixed seat (42), and one end of the first screw (43) is provided with a rotating rod, and the other end of the first screw (43) is provided with a tightening block (44) with a circular main body shape.

3. The clamping and positioning fixture for assembling excavator connecting rods according to claim 1, characterized in that, The three-section pipe anti-rolling assembly (5) includes a mounting plate (51), a housing (52), a T-slot (521), a pull roller (53), a fixing plate (54), a spring, an insert roller (55), and a clamping roller (56). The mounting plate (51) is fixed on the first tilting frame (3), and the housing (52) is fixed on the mounting plate (51); A T-slot (521) is formed on the housing (52); The pull roller (53) is slidably engaged with the housing (52), and a fixed plate (54) is fixedly provided at one end of the pull roller (53); A spring sleeved on the outside of the pull roller (53) is fixed between the inner wall of the housing (52) and the fixed plate (54); One end of the insert roller (55) is fixedly connected to the fixed plate (54), and the other end of the insert roller (55) passes through the through hole opened on the mounting plate (51) and matches the first oil injection hole; The clamping roller (56) is fixed on the inserting roller (55) and moves along the T-slot (521) so that when the clamping roller (56) is in the vertical groove of the T-slot (521), the end of the inserting roller (55) is inserted into the first oil injection hole, and when the clamping roller (56) is in the horizontal groove of the T-slot (521), the end of the inserting roller (55) is disengaged from the first oil injection hole.

4. The clamping and positioning fixture for assembling excavator connecting rods according to claim 1, characterized in that, The horizontal and vertical plate clamping and positioning assembly (8) includes a fixed plate (81), a lead screw assembly (82), and a movable plate (83). The fixing plate (81) is fixed on the mounting bracket (1); The lead screw assembly (82) is fixed on the mounting bracket (1) and the lead screw assembly (82) is connected to a movable plate (83) that is flush with the top of the fixed plate (81).

5. A clamping and positioning fixture for assembling excavator connecting rods according to claim 1, characterized in that, The single-section pipe clamping and positioning assembly (11) includes a connecting frame (111), a first contact circular plate (112), a second contact circular plate (113), a boss (114), and a second screw (115). The first contact circular plate (112) is fixed on the connecting frame (111), and a boss (114) that fits against the inner wall of one side of the single-section pipe is fixed on the first contact circular plate (112). The second contact circular plate (113) is also fixed with a boss (114) that fits against the inner wall of the other side of the single-section tube; The second screw (115) passes through the connecting frame (111), the first contact circular plate (112), the boss (114) on the first contact circular plate (112), the boss (114) on the second contact circular plate (113), and the second contact circular plate (113) in sequence, and the second screw (115) is threadedly connected to the inside of the second contact circular plate (113).

6. A clamping and positioning fixture for assembling excavator connecting rods according to claim 5, characterized in that, The translation component (12) also adopts a lead screw assembly, and the translation component (12) is fixedly connected to the connecting frame (111) in one of the single-section pipe clamping and positioning components (11), and the connecting frame (111) in the other single-section pipe clamping and positioning component (11) is fixedly connected to the mounting frame (1).

7. The clamping and positioning fixture for assembling excavator connecting rods according to claim 3, characterized in that, The second flipping frame (13) and the first flipping frame (3) have the same structure. The first flipping frame (3) includes a mounting base (31) and a flipping rod (32). The mounting base (31) is fixed on the mounting frame (1) and the flipping rod (32) is rotatably connected to the mounting base (31). The mounting plate (51) of the three-section pipe anti-rolling assembly (5) is fixed on the flipping rod (32).

8. The clamping and positioning fixture for assembling excavator connecting rods according to claim 1, characterized in that, The structure of the single-section anti-rolling assembly (14) is completely consistent with the structure of the three-section anti-rolling assembly (5).

9. A clamping and positioning fixture for assembling excavator connecting rods according to claim 1, characterized in that, The main body shape of the three-section pipe support frame (2) and the single-section pipe support frame (10) is V-shaped, and wear-resistant blocks (21) are symmetrically arranged on the three-section pipe support frame (2) and the single-section pipe support frame (10).

10. A clamping and positioning fixture for assembling excavator connecting rods according to claim 1, characterized in that, The mounting bracket (1) is provided with lifting rings (15) at each of its four corners.

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