Crankshaft center hole machining tool

Abstract

The utility model provides a crankshaft center hole machining tool which is used for installing a crankshaft body and comprises two supporting blocks which are oppositely arranged and each provided with an installation block used for installing the crankshaft body. The centering assembly comprises a centering block located between the two cranks of the crankshaft body, centering pins arranged on the two sides of the centering block in a penetrating mode and an adjusting piece arranged on the centering block in a penetrating mode and connected with the two centering pins in an abutting mode. Under the cooperation of the centering assembly, after the crankshaft body is arranged on the two supporting blocks, the adjusting piece is rotated to move on the centering block, so that the centering pins arranged in the centering block in a penetrating mode move out of the side face of the centering block, and the two centering pins abut against the side faces of the two adjacent cranks; the distance between the two cranks and the centering block is equal, so that when center holes are machined in the two sides of the crankshaft body, the crankshaft body cannot laterally deviate, and the machining precision of the center holes needing to be machined in the crankshaft body is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of crankshaft processing tooling, in particular to a crankshaft center hole processing tooling. Background Art

[0002] The crankshaft is an important rotating part of the engine and the power source of the engine. After the connecting rod is installed, it can carry the up and down (reciprocating) motion of the piston and turn it into a circular motion. The quality of crankshaft processing will directly affect the overall performance of the engine. It bears the force transmitted by the connecting rod and converts it into torque output through the crankshaft and drives other accessories on the engine to work.

[0003] For example, the Chinese patent "CN212822832U" discloses a "center hole punching fixture for a single-cylinder engine crankshaft". The fixture realizes the positioning of the left and right handles of the crankshaft to be processed by setting a positioning seat, and then uses a clamping mechanism to clamp and fix the crankshaft to be processed on the positioning seat. At the same time, a rotation limit mechanism is used to prevent the crankshaft to be processed from rotating when punching the center hole, and an axial limit mechanism is used to prevent the crankshaft to be processed from moving axially when punching the center hole. Although the above-mentioned fixture may achieve stability during crankshaft processing, it is often manually mounted on the fixture during installation, and it is impossible to accurately adjust the centering, thereby reducing the accuracy of hole processing. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a crankshaft center hole machining tool, which solves the problem that the fixture in the prior art cannot accurately perform centering adjustment, thereby reducing the accuracy of hole machining.

[0005] According to the embodiment of the utility model, the utility model adopts the following technical solution:

[0006] A crankshaft center hole machining tool, used for installing a crankshaft body, comprising:

[0007] Support blocks, two support blocks are arranged opposite to each other and each is provided with a mounting block for mounting the crankshaft body;

[0008] The centering assembly comprises a centering block located between two cranks of the crankshaft body, centering pins respectively penetrating two sides of the centering block, and an adjusting member penetrating the centering block and abutting against the two centering pins;

[0009] When the adjusting member slides on the centering block, the two centering pins are squeezed by the adjusting member at the same time and synchronously extend out of the side of the centering block so as to abut against the side surfaces of the two adjacent cranks.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] In the present scheme, the crankshaft body that needs center hole processing can be supported and installed by the support block, so as to ensure the stability of the crankshaft body during center hole processing and preliminarily ensure the quality of center hole processing; secondly, with the cooperation of the centering assembly, when the crankshaft body is placed on the two support blocks, the adjusting piece is rotated to move the adjusting piece on the centering block, so that the centering pin penetrated in the centering block is moved out of the side of the centering block, so that the two centering pins abut against the side of the two adjacent cranks, so that the distance between the two cranks and the centering block is equal, thus realizing the centering adjustment of the crankshaft body and preventing the crankshaft body from lateral displacement when the center holes are processed on both sides of the crankshaft body, thereby ensuring the accuracy of the center hole processing on the crankshaft body, which can not only realize centering adjustment but also play a role of limiting.

[0012] Preferably, the adjusting member comprises an adjusting screw threadedly connected to the centering block and a ejector pin slidably disposed on the centering block and connected to the end of the adjusting screw, the end of the ejector pin having a tapered surface, and the tapered surfaces are in contact with the two centering pins.

[0013] Preferably, the adjusting screw is provided with a knob.

[0014] Preferably, an adjusting block is provided at the bottom of the centering block, the adjusting block is slidably arranged on the supporting block, and the adjusting block is provided with a fastening screw, which abuts against the supporting block.

[0015] Preferably, the support block is provided with a mounting screw rod, and the mounting screw rod passes through the support block and is connected to the mounting block.

[0016] Preferably, a mounting seat is provided on the side of the support block, and a plurality of bolts are passed through the mounting seat.

[0017] Preferably, extrusion screws are provided on both sides of the mounting block, one of the extrusion screws abuts against the mounting seat, and the other extrusion screw is provided on the side of the supporting block.

[0018] Preferably, the mounting seat is provided with a positioning groove, and a connecting flat key is clamped in the positioning groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the planar structure of an embodiment of the utility model.

[0020] Figure 2 This is a schematic diagram of the planar structure of the embodiment of the utility model after the crankshaft body is installed.

[0021] Figure 3 It is a three-dimensional structural schematic diagram of an embodiment of the utility model.

[0022] Figure 4 This is a schematic diagram of the three-dimensional structure of the embodiment of the utility model after the crankshaft body is installed.

[0023] In the above drawings: 1. Mounting block; 2. Support block; 3. Crankshaft body; 4. Adjustment block; 5. Centering block; 6. Ejector pin; 7. Centering pin; 8. Adjustment screw; 9. Knob; 10. Connecting key; 11. Fastening screw; 12. Mounting screw; 13. Positioning groove; 14. Mounting seat; 15. Extrusion screw. DETAILED DESCRIPTION

[0024] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0025] like Figures 1 to 4 As shown, the embodiment of the utility model proposes a crankshaft center hole processing tool for installing the crankshaft body 3, including:

[0026] Support blocks 2, two support blocks 2 are arranged opposite to each other and each is provided with a mounting block 1 for mounting a crankshaft body 3;

[0027] A centering assembly, comprising a centering block 5 located between two cranks of the crankshaft body 3, centering pins 7 respectively provided on both sides of the centering block 5, and an adjusting member provided on the centering block 5 and abutting against the two centering pins 7;

[0028] When the adjusting member slides on the centering block 5, the two centering pins 7 are squeezed by the adjusting member at the same time and synchronously extend out of the side of the centering block 5 so as to abut against the side surfaces of the two adjacent cranks.

[0029] In the embodiment of the utility model, the installation system of the crankshaft body 3 is formed by two supporting blocks 2 being arranged relative to each other, and the mounting block 1 is used to position and install the crankshaft body 3. The mounting block 1 has a mounting surface corresponding to the crankshaft body 3. When the crankshaft body 3 is mounted on the mounting block 1, it has a certain stability, and will not rotate or swing when drilling the crankshaft body 3, thereby ensuring the stability of the crankshaft body 3 during the center hole processing, and preliminarily ensuring the quality of the center hole processing; during processing, it is necessary to clean each part (mounting block 1, support block 2, centering assembly, crankshaft body 3, etc.) before installation, and check that each part slides and rotates without jamming.

[0030] Secondly, with the cooperation of the centering component, when the crankshaft body 3 is placed on the two mounting blocks 1, the adjusting piece is rotated to move on the centering block 5, so that the centering pin 7 penetrated in the centering block 5 is moved out of the side of the centering block 5, so that the two centering pins 7 abut against the side of the two adjacent cranks, so that the distance between the two cranks and the centering block 5 is equal, so that when the center hole is processed on both sides of the crankshaft body 3, the crankshaft body 3 will not be laterally offset, and the centering adjustment of the crankshaft body 3 is also realized, so that the position of the hole processing will not change, thereby ensuring the accuracy of the center hole processing on the crankshaft body 3.

[0031] Based on the above scheme, if Figure 1 and Figure 3 As shown, the adjusting member includes an adjusting screw 8 threadedly connected to the centering block 5 and an ejector pin 6 slidably arranged on the centering block 5 and connected to the end of the adjusting screw 8. The end of the ejector pin 6 has a conical surface, and the conical surfaces are in contact with the two centering pins 7. Specifically, when the two centering pins 7 are adjusted by the adjusting member, the adjusting screw 8 is rotated to make the adjusting screw 8 move on the centering block 5 as a whole, and drive the ejector pin 6 connected to one end of the adjusting screw 8 to move, so that the conical surface of the ejector pin 6 squeezes the corresponding two centering pins 7. In the initial state, the small end of the conical surface It is close to the two centering pins 7, so when the ejector pin 6 moves between the two centering pins 7, the cross-section of the conical surface between the ejector pins 6 becomes larger and larger, so that the ejector pin 6 is squeezed by the conical surface and the side of the centering block 5 is highlighted. When one of the centering pins 7 has abutted against the crank and the other centering pin 7 has not abutted against the crank, the abutted centering pin 7 squeezes the crank, causing the crankshaft body 3 to move axially until both centering pins 7 abut against the corresponding cranks, quickly completing the centering adjustment and ensuring the accuracy of the center hole processing. Secondly, the adjusting screw 8 is provided with a knob 9, which is convenient for the operator to manually adjust the adjusting screw 8, which is convenient and labor-saving.

[0032] Specifically, Figure 1 As shown, an adjusting block 4 is provided at the bottom of the centering block 5, and the adjusting block 4 is slidably arranged on the supporting block 2, and the adjusting block 4 is provided with a fastening screw 11, and the fastening screw 11 abuts against the supporting block 2. Due to different workpieces, the crank sizes are different. In order to facilitate the centering pin 7 to abut on the crank, the fastening screw 11 can be loosened and the adjusting block 4 can be directly slid to drive the centering block 5 to move up and down, so as to quickly adjust the positions of the two centering pins 7 to correspond to the crank in the crankshaft body 3 to be processed, thereby improving the applicability. After adjustment, the fastening screw 11 can be tightened to fix the position of the adjusting block 4.

[0033] Specifically, Figure 1 As shown, the support block 2 is provided with a mounting screw 12 , which passes through the support block 2 and is connected to the mounting block 1 , so that the support block 2 can be quickly disassembled and assembled to facilitate the replacement of different support blocks 2 .

[0034] And based on the use, such as Figure 3 As shown, a mounting seat 14 is provided on the side of the support block 2, and a plurality of bolts are passed through the mounting seat 14. The whole can be mounted on the machine tool for use through the mounting seat 14, and based on the centering reference of the machine tool, as shown in FIG. Figure 1 and Figure 3As shown, extrusion screws 15 are provided on both sides of the mounting block 1, one of the extrusion screws 15 is in contact with the mounting seat 14, and the other extrusion screw 15 is provided on the side of the supporting block 2. After installation, the position of the mounting block 1 can be fine-tuned by adjusting the extrusion screws 15 to ensure the accuracy of subsequent hole processing.

[0035] Specifically, the mounting seat 14 is provided with a positioning groove 13 , in which the connecting flat key 10 is clamped. When in use, the connecting flat key 10 is installed on the machine tool to facilitate the positioning and installation of the mounting seat 14 .

[0036] In summary, when the center hole of the crankshaft body 3 is processed, the crankshaft body 3 is placed between the two mounting blocks 1, and then the adjusting block 4 is slid to move the adjusting block 4 up and down to adjust the position of the centering block 5, and then the knob 9 is turned to move the adjusting screw 8 as a whole on the centering block 5, and drive the ejector pin 6 connected to one end of the adjusting screw 8 to move, so that the conical surface of the ejector pin 6 squeezes the corresponding two centering pins 7, so that the two centering pins 7 abut against the two cranks of the crankshaft body 3, and the centering adjustment is completed quickly, ensuring the accuracy of subsequent center hole processing.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A crankshaft center hole machining tool, used for installing a crankshaft body (3), characterized in that: include: Support blocks (2), two of the support blocks (2) being arranged opposite to each other and each being provided with a mounting block (1) for mounting the crankshaft body (3); A centering assembly, comprising a centering block (5) located between two cranks of the crankshaft body (3), centering pins (7) respectively penetrating two sides of the centering block (5), and an adjusting member penetrating the centering block (5) and abutting against the two centering pins (7); When the adjusting member slides on the centering block (5), the two centering pins (7) are squeezed by the adjusting member and synchronously extend out of the side of the centering block (5) so as to abut against the side of two adjacent cranks.

2. A crankshaft center hole machining tool according to claim 1, characterized in that: The adjusting member comprises an adjusting screw (8) threadedly connected to the centering block (5) and a push pin (6) slidably arranged on the centering block (5) and connected to the end of the adjusting screw (8), wherein the end of the push pin (6) has a conical surface, and the conical surface is in contact with the two centering pins (7).

3. A crankshaft center hole machining tool according to claim 2, characterized in that: The adjusting screw (8) is provided with a knob (9).

4. A crankshaft center hole machining tool according to claim 1, characterized in that: An adjusting block (4) is provided at the bottom of the centering block (5), the adjusting block (4) is slidably arranged on the supporting block (2), and the adjusting block (4) is provided with a fastening screw (11), and the fastening screw (11) abuts against the supporting block (2).

5. The crankshaft center hole machining tool according to claim 1, characterized in that: The support block (2) is provided with a mounting screw (12), and the mounting screw (12) passes through the support block (2) and is connected to the mounting block (1).

6. A crankshaft center hole machining tool according to claim 5, characterized in that: A mounting seat (14) is provided on the side of the support block (2), and a plurality of bolts are passed through the mounting seat (14).

7. A crankshaft center hole machining tool according to claim 6, characterized in that: Extrusion screws (15) are provided on both sides of the mounting block (1), one of the extrusion screws (15) abuts against the mounting seat (14), and the other of the extrusion screws (15) is provided on the side of the support block (2).

8. A crankshaft center hole machining tool according to claim 6, characterized in that: The mounting seat (14) is provided with a positioning groove (13), and a connecting flat key (10) is clamped in the positioning groove (13).

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