Connecting rod rear shoulder position chambering clamp

Abstract

The utility model belongs to the technical field of clamps, and discloses a connecting rod rear shoulder position chambering clamp which comprises a workbench, the workbench is provided with two first installation blocks and two second installation blocks in a square shape, the two first installation blocks are in an L shape, the two second installation blocks are in an I shape, the two first installation blocks are symmetrically installed, and the two second installation blocks are symmetrically installed. The two first mounting blocks and the two second mounting blocks are each provided with a positioning mechanism and a jacking and clamping mechanism. A pressing mechanism is mounted on the second mounting block; the pressing mechanism comprises a power rod rotationally mounted on the second mounting block, the power rod is in threaded connection with a moving block, one side face of the moving block makes contact with the second mounting block, the lower side of the moving block is integrally connected with an outer tooth cylinder, and the lower side of the outer tooth cylinder is integrally connected with a threaded cylinder; the tooth shape of the outer tooth cylinder is matched with a tooth sleeve in a meshed mode, the tooth sleeve is integrally connected with a pressing block, and the threaded cylinder is in threaded connection with a hexagon nut.

Description

Technical Field

[0001] The utility model belongs to the technical field of clamps, and in particular relates to a connecting rod rear shoulder hole expanding clamp. Background Art

[0002] A connecting rod is a common part in a mechanical device, usually composed of a connecting rod body, a connecting rod big end cover, a connecting rod small end bushing, a connecting rod big end bearing, etc. It is used to connect the piston and the crankshaft, transmit the force acting on the piston to the crankshaft, and convert the reciprocating motion of the piston into the rotational motion of the crankshaft to output power. There are various types of connecting rods, including straight-rod connecting rods, crank connecting rods, clutch connecting rods, etc., which are used in different mechanical systems.

[0003] The connecting rod is an irregular part. The rear shoulder of the connecting rod usually refers to the curved surface with a slope at the connection between the big end of the connecting rod and the rod body.

[0004] Relevant staff members found in the actual clamping process that in order to ensure the accurate position of the connecting rod after clamping and to ensure the accurate position of the hole expansion, the clamping method of the connecting rod mostly adopts the method of resisting at both ends of the connecting rod and then pressing the rod body to fix the position of the connecting rod. However, one problem with such a clamping method is that during the hole expansion process of the connecting rod, the pressure from both ends may cause stress deformation of the hole, and the pressing of the rod body is too far away from the hole expansion position, and the vibration caused by the hole expansion cannot be suppressed well. There is a possibility of vibration, which will affect the diameter size and roughness inside the hole after hole expansion. Furthermore, the vibration may also cause the milling cutter to break. Therefore, the best place to press the connecting rod should be the rear shoulder of the connecting rod. The thickness of the rear shoulder of the connecting rod is sufficient, and it is close to the hole expansion position, and the pressing strength is high. Therefore, the present application designs a clamp based on the pressing of the rear shoulder of the connecting rod. Utility Model Content

[0005] In view of the problems raised by the above background technology, the purpose of the utility model is to provide a connecting rod rear shoulder expansion clamp.

[0006] In order to achieve the above technical purpose, the technical solution adopted by the utility model is as follows:

[0007] A connecting rod rear shoulder hole expansion fixture, comprising a workbench, the workbench is in a U-shaped shape and is equipped with two first mounting blocks and two second mounting blocks, the two first mounting blocks are in an L-shaped shape, the two second mounting blocks are in an I-shaped shape, the two first mounting blocks are symmetrically installed, and the two first mounting blocks and the two second mounting blocks are respectively equipped with a positioning mechanism and a top clamping mechanism;

[0008] The positioning mechanism comprises a threaded rod, and a first top block is mounted on the end of the threaded rod;

[0009] The top clamping mechanism comprises a telescopic cylinder, and a second top block is installed at the output end of the telescopic cylinder;

[0010] The second mounting block is equipped with a pressing mechanism;

[0011] The pressing mechanism includes a power rod rotatably mounted on the second mounting block, the power rod is threadedly connected to a moving block, one side of the moving block is in contact with the second mounting block, an outer gear cylinder is integrally connected to the lower side of the moving block, a threaded cylinder is integrally connected to the lower side of the outer gear cylinder, the maximum diameter of the outer gear cylinder is larger than the maximum diameter of the threaded cylinder, the tooth shape of the outer gear cylinder is meshed with a gear sleeve, the gear sleeve is integrally connected to a pressing block, and the threaded cylinder is threadedly connected to a hexagonal nut.

[0012] It is further defined that the workbench is provided with four waist-shaped holes in a U-shape, and the first mounting block and the second mounting block are both installed in the waist-shaped holes. Such a design ensures the stable installation of the first mounting block and the second mounting block while being able to adjust the installation positions of the first mounting block and the second mounting block to ensure the clamping and fixation of connecting rods of different specifications.

[0013] It is further defined that the power end of the power rod is a motor. Such a design realizes automated pressing, and the clamping efficiency can improve production efficiency.

[0014] It is further defined that the power end of the threaded rod is connected with a screw cap, and such a design facilitates the rotation of the threaded rod.

[0015] It is further defined that the workbench is provided with an avoidance hole, and such a design prevents interference with the operation of the boring tool.

[0016] The beneficial effects of adopting the utility model are:

[0017] The structural design of the utility model is adopted to suppress the rear shoulder position of the connecting rod. Because it is close to the hole expansion position, the hole expansion accuracy is guaranteed under shaking. The top clamps on both sides of the connecting rod are only for positioning effect. There is no pressure during the hole expansion process, so the hole of the connecting rod will not be deformed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention can be further described by the non-limiting embodiments given in the accompanying drawings;

[0019] Figure 1 It is a structural schematic diagram of an embodiment of a connecting rod rear shoulder expansion fixture of the utility model;

[0020] Figure 2 It is a schematic cross-sectional structure diagram of the power rod position of an embodiment of a connecting rod rear shoulder expansion clamp of the utility model;

[0021] Figure 3It is a partial exploded structural schematic diagram of a pressing mechanism of an embodiment of a connecting rod rear shoulder expansion fixture of the utility model;

[0022] The main component symbols are described as follows:

[0023] Workbench 1; first mounting block 2; second mounting block 3; positioning mechanism 4; top clamping mechanism 5; pressing mechanism 6; waist-shaped hole 7; screw cap 8; avoidance hole 9;

[0024] Threaded rod 41; first top block 42;

[0025] Telescopic cylinder 51; second top block 52;

[0026] Power rod 61; moving block 62; external gear cylinder 63; threaded cylinder 64; gear sleeve 65; pressing block 66; hexagonal nut 67. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0028] like Figure 1 , Figure 2 , Figure 3 As shown, a connecting rod rear shoulder hole expansion fixture of the utility model comprises a workbench 1, the workbench 1 is installed with two first mounting blocks 2 and two second mounting blocks 3 in a U-shaped shape, the two first mounting blocks 2 are L-shaped, the two second mounting blocks 3 are I-shaped, the two first mounting blocks 2 are symmetrically installed, and the two first mounting blocks 2 and the two second mounting blocks 3 are respectively installed with a positioning mechanism 4 and a top clamping mechanism 5;

[0029] The positioning mechanism 4 comprises a threaded rod 41, and a first top block 42 is mounted on the end of the threaded rod 41;

[0030] The top clamping mechanism 5 comprises a telescopic cylinder 51, and a second top block 52 is installed at the output end of the telescopic cylinder 51;

[0031] The second mounting block 3 is equipped with a pressing mechanism 6;

[0032] The pressing mechanism 6 includes a power rod 61 rotatably mounted on the second mounting block 3, the power rod 61 is threadedly connected to a moving block 62, one side of the moving block 62 is in contact with the second mounting block 3, an outer gear cylinder 63 is integrally connected to the lower side of the moving block 62, a threaded cylinder 64 is integrally connected to the lower side of the outer gear cylinder 63, the maximum diameter of the outer gear cylinder 63 is larger than the maximum diameter of the threaded cylinder 64, the tooth profile of the outer gear cylinder 63 is meshed with a gear sleeve 65, the gear sleeve 65 is integrally connected to a pressing block 66, and the threaded cylinder 64 is threadedly connected to a hexagonal nut 67.

[0033] In this embodiment, when a connecting rod rear shoulder expansion fixture is used, the four sides of the connecting rod blank are first processed into processing surfaces, and then the connecting rod blank to be expanded is adapted to determine the basic position of the positioning mechanism 4. The adjustment method for the positioning mechanism 4 is to rotate the threaded rod 41, and the position of the first top block 42 will change, thereby achieving the adjustment purpose;

[0034] The end and side of the connecting rod are brought into contact with the first top block 42 on the positioning mechanism 4, and then the top clamping mechanism 5 is started, and the telescopic cylinder 51 drives the second top block 52 to apply force to the remaining two sides of the connecting rod. Under the action of this force, the position of the connecting rod is determined, and the purpose of rapid positioning is achieved. The pressing mechanism 6 is operated, and the power rod 61 rotates, which should drive the moving block 62 to rotate, but because of the interference of the second mounting block 3, the moving block 62 cannot rotate and can only move up and down in the axial direction of the power rod 61. The rotation direction of the power rod 61 is controlled so that the moving block 62 and the pressing block 66 installed on the lower side of the moving block 62 move downward, thereby achieving the pressing of the connecting rod. After the pressing is completed, the top clamping mechanism 5 returns to its position to prevent the applied force from changing the hole shape during the hole expansion process.

[0035] For connecting rods of different specifications, the position of the rear shoulder of the connecting rod will change, so the angle of the pressure block 66 needs to be adjusted accordingly. The adjustment method is to unscrew the hexagonal nut 67, and then remove the gear sleeve 65 from the outer gear cylinder 63, so that the angle of the pressure block 66 can be easily adjusted. After the angle of the pressure block 66 is determined, the gear sleeve 65 is put back on the outer gear cylinder 63, and then the hexagonal nut 67 is used in conjunction with the threaded cylinder 64 to limit the gear sleeve 65.

[0036] Preferably, the workbench 1 is in a U-shape and is provided with four waist-shaped holes 7, and the first mounting block 2 and the second mounting block 3 are both installed in the waist-shaped holes 7. Such a design ensures that the first mounting block 2 and the second mounting block 3 are installed stably while being able to adjust the installation positions of the first mounting block 2 and the second mounting block 3 to ensure the clamping and fixation of connecting rods of different specifications. In fact, the fixed installation structure of the first mounting block 2 and the second mounting block 3 can also be considered according to specific circumstances.

[0037] Preferably, the power end of the power rod 61 is a motor. This design realizes automated pressing, and the clamp pressing efficiency can improve production efficiency. In fact, the power end of the power rod 61 can also be selected according to specific circumstances, and it is also possible to choose to use a wrench to twist it.

[0038] Preferably, the power end of the threaded rod 41 is connected with a screw cap 8. Such a design facilitates the rotation of the threaded rod 41. In fact, a structure that facilitates the rotation of the threaded rod 41 can also be considered according to specific circumstances, and a servo motor can be selected for rotation.

[0039] Preferably, the workbench 1 is provided with an avoidance hole 9. Such a design prevents interference with the operation of the boring tool. In fact, measures to prevent interference with the operation of the boring tool may also be considered according to specific circumstances.

[0040] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the relevant technical field without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A connecting rod rear shoulder hole expansion fixture, comprising a workbench (1), characterized in that: The workbench (1) is installed in a U-shaped manner with two first mounting blocks (2) and two second mounting blocks (3); the two first mounting blocks (2) are L-shaped, and the two second mounting blocks (3) are I-shaped; the two first mounting blocks (2) are symmetrically installed, and the two first mounting blocks (2) and the two second mounting blocks (3) are respectively installed with a positioning mechanism (4) and a top clamping mechanism (5); The positioning mechanism (4) comprises a threaded rod (41), and a first top block (42) is mounted on the end of the threaded rod (41); The top clamping mechanism (5) comprises a telescopic cylinder (51), and a second top block (52) is installed at the output end of the telescopic cylinder (51); The second mounting block (3) is equipped with a pressing mechanism (6); The pressing mechanism (6) comprises a power rod (61) rotatably mounted on the second mounting block (3); the power rod (61) is threadedly connected to a moving block (62); one side of the moving block (62) contacts the second mounting block (3); an outer gear cylinder (63) is integrally connected to the lower side of the moving block (62); a threaded cylinder (64) is integrally connected to the lower side of the outer gear cylinder (63); the maximum diameter of the outer gear cylinder (63) is greater than the maximum diameter of the threaded cylinder (64); the tooth profile of the outer gear cylinder (63) is meshed with a tooth sleeve (65); the tooth sleeve (65) is integrally connected to a pressing block (66); and the threaded cylinder (64) is threadedly connected to a hexagonal nut (67).

2. A connecting rod rear shoulder hole expansion fixture according to claim 1, characterized in that: The workbench (1) is in a U-shaped shape and is provided with four waist-shaped holes (7), and the first mounting block (2) and the second mounting block (3) are both mounted in the waist-shaped holes (7).

3. A connecting rod rear shoulder hole expansion fixture according to claim 2, characterized in that: The power end of the power rod (61) is a motor.

4. A connecting rod rear shoulder hole expansion fixture according to claim 3, characterized in that: The power end of the threaded rod (41) is connected with a screw cap (8).

5. A connecting rod rear shoulder hole expansion fixture according to claim 4, characterized in that: The workbench (1) is provided with an avoidance hole (9).

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