Manufacturing tool jig for small-eccentric-distance crankshaft

Abstract

The utility model provides a manufacturing tool jig for a small-eccentric-distance crankshaft. The manufacturing tool jig comprises a base, wherein a jig assembly is arranged at the top of the base; the jig assembly comprises a guide rod arranged at the top of the base, a height adjusting plate is arranged on the peripheral side face of the guide rod in the height direction of the guide rod in an up-down sliding mode, a limiting rod is transversely arranged at the top of the height adjusting plate, and two sliding blocks are arranged on the peripheral side face of the limiting rod in the length direction of the limiting rod in a left-right sliding mode. According to the manufacturing tool jig for the small-eccentric-distance crankshaft, the electric push rod drives the lower pressing block to move downwards in the clamping frame, so that the lower pressing block abuts against the tops of the two ends of the crankshaft, the two ends of the crankshaft are fixed, the stability of the device when the crankshaft is fixed is improved, and the production efficiency is improved. And meanwhile, through the arrangement of a baffle and the two clamping frames capable of moving at the same time, the positions from the two ends of the crankshaft to the perforating machine can be conveniently positioned and adjusted, and the use efficiency of the device is improved to a certain degree.

Description

Technical Field

[0001] This utility model relates to the field of crankshaft processing, and in particular to a tooling fixture for manufacturing small eccentric crankshafts. Background Technology

[0002] The crankshaft is the main rotating component of an engine, typically made of carbon structural steel, ductile iron, or high-strength alloy steel. It converts the reciprocating motion of the piston into its own cyclic rotation, bears the force transmitted from the connecting rod and converts it into torque output, driving other accessories on the engine. It is the power source for the engine and even the entire mechanical system.

[0003] When the engine is running, the piston reciprocates linearly within the cylinder. The combustion of the compressed air pushes the piston, which transmits force to the crankshaft via the connecting rod, causing the crankshaft to rotate. This converts linear motion into rotational motion, thereby providing power to vehicles or other equipment.

[0004] Existing crankshaft manufacturing fixtures cannot simultaneously machine two aligned center holes on the same end face when processing crankshafts with small eccentricities. Therefore, when processing crankshafts with small eccentricities, the manufacturing fixture needs to be changed. Application No.: CN202122727069.2 provides a manufacturing fixture for small eccentricity crankshafts, which can facilitate the processing of crankshafts with small eccentricities without requiring equipment changes during operation. However, this device relies solely on a single crankshaft clamping assembly to fix the crankshaft, which may lead to displacement during drilling. Furthermore, the clamping assembly is located above two drilling machines, requiring that the distance from both ends of the crankshaft to the drilling machines be equal during clamping; otherwise, inconsistent drilling distances on both sides will occur, necessitating constant adjustments during fixing, which is quite cumbersome.

[0005] Therefore, it is necessary to provide a tooling fixture for manufacturing small-eccentric crankshafts to solve the above-mentioned technical problems. Utility Model Content

[0006] This utility model provides a tooling fixture for manufacturing small eccentricity crankshafts, which solves the problem that in the related technology, some existing tooling fixtures for manufacturing small eccentricity crankshafts are not convenient to provide a relatively stable fixing effect for the crankshaft and require constant adjustment, resulting in cumbersome operation.

[0007] To solve the above-mentioned technical problems, this utility model provides a manufacturing fixture for a small eccentric crankshaft, comprising: a base, wherein a fixture assembly is provided on the top of the base;

[0008] The fixture assembly includes a guide rod disposed on the top of the base. A height adjustment plate is disposed on the peripheral side of the guide rod, which can slide up and down along its height direction. A limit rod is disposed laterally on the top of the height adjustment plate. Two sliding blocks are disposed on the peripheral side of the limit rod, which can slide left and right along its length direction.

[0009] Preferably, each of the two sliding blocks is provided with a clamping frame at its top, and each of the two clamping frames is provided with an electric push rod at its top inner wall. Each of the two clamping frames is provided with a pressing block that can slide up and down on its inner side. The telescopic ends of the bottom of the two electric push rods are respectively fixedly connected to the top of the two pressing blocks.

[0010] Preferably, baffles are rotatably provided on the sides of the two clamping frames that are far apart from each other, a support frame is provided on the top of the base and inside the height adjustment plate, and an electrically controlled telescopic rod is provided on the top of the base, with the telescopic end of the top of the electrically controlled telescopic rod being fixedly connected to the bottom of the height adjustment plate.

[0011] Preferably, a first bidirectional lead screw is rotatably mounted on the front side of the top of the height adjustment plate, and the peripheral side of the first bidirectional lead screw is threadedly connected to the inner side of the two sliding blocks. A first motor for driving the first bidirectional lead screw to rotate is provided on the right side of the bottom of the height adjustment plate.

[0012] Preferably, the top of the base is provided with movable blocks that can slide left and right on both sides, and the top of the two movable blocks is provided with a punching machine.

[0013] Preferably, a second bidirectional lead screw is rotatably provided on the inner side of the base, the peripheral side of the second bidirectional lead screw is threadedly connected to the bottom of the two moving blocks, and a dual-axis motor for driving the second bidirectional lead screw to rotate is provided on the inner side of the base.

[0014] Compared with related technologies, the manufacturing fixture for a small eccentric crankshaft provided by this utility model has the following beneficial effects:

[0015] This utility model provides a tooling fixture for manufacturing a small eccentric crankshaft. An electric push rod drives the lower pressure block to move downward inside the clamping frame, so that the lower pressure block presses against the top of both ends of the crankshaft, thereby fixing both ends of the crankshaft and improving the stability of the device when fixing the crankshaft. At the same time, the setting of the baffle and the setting of two clamping frames that can move at the same time facilitate the positioning and adjustment of both ends of the crankshaft to the position of the drilling machine, which improves the efficiency of the device to a certain extent. Attached Figure Description

[0016] Figure 1 A schematic diagram of a preferred embodiment of a manufacturing fixture for a small eccentric crankshaft provided by this utility model;

[0017] Figure 2 for Figure 1 A three-dimensional structural diagram of the base portion shown;

[0018] Figure 3 for Figure 1 The diagram shows the structure of the clamping frame portion as shown in the right view.

[0019] The following components are labeled in the diagram: 1. Base; 2. Fixture assembly; 21. Guide rod; 22. Height adjustment plate; 23. Limiting rod; 24. Sliding block; 25. Clamping frame; 26. Electric push rod; 27. Pressing block; 28. Baffle; 29. ​​Support frame; 3. Electrically controlled telescopic rod; 4. First bidirectional lead screw; 5. First motor; 6. Moving block; 7. Drilling machine; 8. Second bidirectional lead screw; 9. Dual-axis motor. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Please refer to the following: Figure 1 , Figure 2 , Figure 3 ,in Figure 1 A schematic diagram of a preferred embodiment of a manufacturing fixture for a small eccentric crankshaft provided by this utility model; Figure 2 for Figure 1 A three-dimensional structural diagram of the base portion shown; Figure 3 for Figure 1 The right view of the fixed frame shown is a structural schematic diagram. A tooling fixture for manufacturing a small eccentric crankshaft includes: a base 1, and a fixture assembly 2 is provided on the top of the base 1.

[0022] The fixture assembly 2 includes a guide rod 21 disposed on the top of the base 1. A height adjustment plate 22 is disposed on the peripheral side of the guide rod 21, which can slide up and down along its height direction. A limit rod 23 is disposed laterally on the top of the height adjustment plate 22. Two sliding blocks 24 are disposed on the peripheral side of the limit rod 23, which can slide left and right along its length direction.

[0023] By setting the height-adjustable adjustment plate 22, the drilling needs can be met when the height of the center holes at both ends of the crankshaft is not necessarily different when fixing crankshafts of different thicknesses.

[0024] Each of the two sliding blocks 24 is provided with a clamping frame 25 at its top, and each of the two clamping frames 25 is provided with an electric push rod 26 at its top inner wall. Each of the two clamping frames 25 is provided with a pressing block 27 that can slide up and down on its inner side. The telescopic ends of the bottom of the two electric push rods 26 are respectively fixedly connected to the top of the two pressing blocks 27.

[0025] The electric push rod 26 drives the lower pressure block 27 to move downward inside the clamping frame 25, so that the lower pressure block 27 presses against the top of both ends of the crankshaft, thereby fixing the crankshaft.

[0026] Both clamping frames 25 are equipped with baffles 28 that can be rotated on opposite sides. A support frame 29 is provided on the top of the base 1 and inside the height adjustment plate 22. An electrically controlled telescopic rod 3 is provided on the top of the base 1, and the telescopic end of the top of the electrically controlled telescopic rod 3 is fixedly connected to the bottom of the height adjustment plate 22.

[0027] When it is necessary to fix the crankshaft, the crankshaft can first be placed on the top of the support frame 29. Then, the crankshaft can be moved into the clamping position by the relative movement of the two clamping frames 25. With the setting of the baffle 28, even if there is a certain left and right error when the crankshaft is placed, the crankshaft will slide left and right on the support frame 29 as the two clamping frames 25 continue to move towards the middle. This ensures that the distance between the crankshaft and the left and right drilling machines 7 is kept consistent when drilling, reducing the difficulty of fixing the crankshaft.

[0028] A first bidirectional lead screw 4 is rotatably mounted on the front side of the top of the height adjustment plate 22. The circumferential side of the first bidirectional lead screw 4 is threadedly connected to the inner side of two sliding blocks 24. A first motor 5 for driving the first bidirectional lead screw 4 to rotate is mounted on the right side of the bottom of the height adjustment plate 22.

[0029] The rotation of the output end of the first motor 5 drives the rotation of the first bidirectional lead screw 4, which in turn drives the two sliding blocks 24 to move relative to each other or apart, thereby enabling the crankshaft to be fixedly clamped.

[0030] The top of the base 1 has movable blocks 6 that can slide left and right on the left and right sides, and the top of the two movable blocks 6 is mirrored with a punch 7.

[0031] A second bidirectional lead screw 8 is rotatably mounted on the inner side of the base 1. The circumferential side of the second bidirectional lead screw 8 is threadedly connected to the bottom of the two moving blocks 6. A dual-axis motor 9 for driving the second bidirectional lead screw 8 to rotate is mounted on the inner side of the base 1.

[0032] The rotation of the output end of the dual-axis motor 9 drives the rotation of the second bidirectional lead screw 8, thereby causing the two moving blocks 6 to move closer to each other, so that the two punching machines 7 move simultaneously to the side closer to both ends of the crankshaft.

[0033] The working principle of the tooling fixture for manufacturing a small eccentric crankshaft provided by this utility model is as follows:

[0034] Step 1: When in use, the approximate position of the middle part of the crankshaft can be placed on the top of the support frame 29. Then, the rotation of the output end of the first motor 5 drives the rotation of the first bidirectional lead screw 4, which in turn drives the relative movement of the two sliding blocks 24. When the crankshaft moves to the left and right ends abutting against the side of the baffle 28, the rotation of the first motor 5 is stopped. The electric push rod 26 drives the lower pressure block 27 to move downward inside the clamping frame 25, so that the lower pressure block 27 presses against the top of both ends of the crankshaft, thereby fixing the crankshaft.

[0035] Step 2: After fixing, first rotate the baffle 28 upward to expose both ends of the crankshaft. The extension of the output end of the electric telescopic rod 3 allows the height adjustment plate 22 to rise. When the center of both ends of the crankshaft is aligned with the punching head of the punching machine 7, stop the extension of the electric telescopic rod 3. Instead, control the rotation of the output end of the dual-axis motor 9 to drive the rotation of the second bidirectional lead screw 8, thereby causing the two moving blocks 6 to move closer to each other. This allows the two punching machines 7 to move simultaneously to one side closer to the ends of the crankshaft to perform the punching operation.

[0036] Compared with related technologies, the manufacturing fixture for a small eccentric crankshaft provided by this utility model has the following beneficial effects:

[0037] The electric push rod 26 drives the lower pressure block 27 to move downward inside the clamping frame 25, so that the lower pressure block 27 presses against the top of both ends of the crankshaft, thereby fixing both ends of the crankshaft and improving the stability of the device when fixing the crankshaft. At the same time, the setting of the baffle 28 and the setting of two clamping frames 25 that can move at the same time facilitate the positioning and adjustment of both ends of the crankshaft to the position of the drilling machine 7, which improves the efficiency of the device to a certain extent.

[0038] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A jig for manufacturing a small eccentricity crankshaft, characterized by comprising: include: A base (1), on the top of which a fixture assembly (2) is provided; The fixture assembly (2) includes a guide rod (21) disposed on the top of the base (1). A height adjustment plate (22) is disposed on the peripheral side of the guide rod (21) and can slide up and down along its height direction. A limit rod (23) is disposed horizontally on the top of the height adjustment plate (22). Two sliding blocks (24) are disposed on the peripheral side of the limit rod (23) and can slide left and right along its length direction. A clamping frame (25) is disposed on the top of each of the two sliding blocks (24). An electric push rod (26) is disposed on the top of the inner wall of each of the two clamping frames (25). A pressing block (27) is disposed on the inner side of each of the two clamping frames (25) and can slide up and down. The telescopic ends of the bottom of the two electric push rods (26) correspond to the two pressing blocks respectively. (27) is fixedly connected to the top. The two clamping frames (25) are rotatably provided with baffles (28) on the sides that are far apart from each other. The top of the base (1) and the inner side of the height adjustment plate (22) are provided with a support frame (29). The top of the base (1) is provided with an electric telescopic rod (3). The telescopic end of the top of the electric telescopic rod (3) is fixedly connected to the bottom of the height adjustment plate (22). The front side of the top of the height adjustment plate (22) is rotatably provided with a first bidirectional screw (4). The peripheral side of the first bidirectional screw (4) is threadedly connected to the inner side of the two sliding blocks (24). The right side of the bottom of the height adjustment plate (22) is provided with a first motor (5) for driving the first bidirectional screw (4) to rotate.

2. The manufacturing tooling jig for a small eccentricity crankshaft of claim 1, wherein, The base (1) has movable blocks (6) that can slide left and right on the top left and right sides, and the top of the two movable blocks (6) is mirrored with a punch (7).

3. The manufacturing tooling jig for a small eccentricity crankshaft of claim 2, wherein, The base (1) is provided with a second bidirectional lead screw (8) which is rotatably mounted on the inner side. The circumferential side of the second bidirectional lead screw (8) is threadedly connected to the bottom of the two moving blocks (6). The base (1) is provided with a dual-axis motor (9) for driving the second bidirectional lead screw (8) to rotate.

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