Clamping device for engine connecting rod machining

Abstract

The utility model relates to the field of clamping devices, in particular to a clamping device for machining an engine connecting rod. The clamping device for machining the engine connecting rod solves the technical problems that an existing clamping device for machining the engine connecting rod is generally only suitable for connecting rods of fixed specifications and sizes, corresponding adjustment is not convenient to conduct according to different connecting rods, and the using effect is limited. Comprising a workbench, a first clamping assembly, a second clamping assembly, a third clamping assembly, a blank part, a connecting rod and foot columns, the first clamping assembly, the second clamping assembly and the third clamping assembly which are of an adjustable structure can be used for clamping different connecting rod machining parts correspondingly, and the first clamping assembly can be used for clamping the blank part; the second clamping assembly can be used for directly clamping and fixing the connecting rod, the third clamping assembly can be used for clamping and fixing the connecting rod or related machining parts from another angle, and the clamping device with multiple clamping modes is convenient and practical.

Description

Technical Field

[0001] The utility model relates to the field of clamping devices, in particular to a clamping device for engine connecting rod processing. Background Technique

[0002] An engine is a machine that can convert other forms of energy into mechanical energy. The engine connecting rod is an important component in the engine. Its function is to connect the piston and the crankshaft, convert the reciprocating motion of the piston into the rotational motion of the crankshaft, and transmit the force acting on the piston to the crankshaft to output power. The clamping device for engine connecting rod processing is a device used to fix and limit the engine connecting rod for processing operations such as drilling. The existing clamping devices for engine connecting rod processing usually can only be applicable to connecting rods with fixed specifications and sizes, and are not convenient for corresponding adjustment according to different connecting rods, resulting in limited use effects. Content of the Utility Model

[0003] In order to overcome the existing clamping devices for engine connecting rod processing, which usually can only be applicable to connecting rods with fixed specifications and sizes, and are not convenient for corresponding adjustment according to different connecting rods, resulting in limited use effects.

[0004] The technical solution of the utility model is: a clamping device for engine connecting rod processing, including a workbench, a first clamping component, a second clamping component, a third clamping component, a blank part, a connecting rod and foot columns. A sliding groove for the first clamping component to slide is opened in the middle of the upper end of the workbench. The first clamping component for clamping and fixing the blank part is installed in the sliding groove. The blank part for processing is clamped on the first clamping component. Two groups of second clamping components for clamping and fixing the connecting rod are symmetrically arranged on the front and rear sides of the upper end of the workbench. The connecting rod is clamped between the two groups of second clamping components. A third clamping component for clamping and fixing the connecting rod or related processing parts is arranged above the second clamping component. Foot columns for support are arranged around the four corners of the lower end of the workbench.

[0005] Preferably, by setting the first clamping component, the second clamping component and the third clamping component, different connecting rod processing parts can be clamped respectively, and the first clamping component, the second clamping component and the third clamping component are all adjustable structures, and can be correspondingly adjusted according to different connecting rods, with stronger applicability. By setting the first clamping component, the blank part can be clamped. By setting the second clamping component, the connecting rod can be directly clamped and fixed to maintain its stability during the processing. By setting the third clamping component, the connecting rod or related processing parts can be clamped and fixed from another angle. The clamping device that can clamp and fix the connecting rod and related processing parts in a variety of clamping ways is more convenient and practical.

[0006] Preferably, the first clamping assembly includes a first driving motor, a bidirectional threaded rod, sliders, a first telescopic cylinder, a first electric push rod, and a clamping module. Two sets of sliders for sliding are symmetrically sleeved on the outer side of the bidirectional threaded rod. The first driving motor drives the bidirectional threaded rod to rotate to drive the sliders to slide along its surface. The upper end of the slider is provided with a first telescopic cylinder for controlling the up and down movement of the first electric push rod. The upper end of the first electric push rod is provided with a clamping module for clamping and fixing the blank part. The clamping module is adjustably connected to the first telescopic cylinder through the first electric push rod. By setting the first telescopic cylinder, the up and down movement of the first electric push rod can be controlled, so that the first electric push rod can drive the clamping module to move up and down to adjust its height.

[0007] Preferably, the clamping module includes a second driving motor, a rotating shaft, a mounting frame, a ring sleeve, adjusting bolts, a first limiting block, a first protective layer, a limiting sleeve, a second limiting block, a second protective layer, a spring, and a damper. The second driving motor is rotatably connected to the mounting frame through the rotating shaft. The second driving motor drives the mounting frame to rotate by driving the rotating shaft to rotate. A ring sleeve for mounting the first limiting block is provided at one end of the mounting frame away from the rotating shaft. Four groups of first limiting blocks for clamping and fixing the blank part are circumferentially arranged inside the ring sleeve. Four groups of adjusting bolts matching the first limiting blocks are circumferentially arranged outside the ring sleeve. The adjusting bolts pass through the outside of the ring sleeve and extend to the inside to adjust the position of the first limiting block. By setting the adjusting bolts, the movement of the first limiting block can be controlled, so that the tightening degree of the clamping by the first limiting block can be adjusted by screwing the adjusting bolts.

[0008] Preferably, a first protective layer for protecting the blank part is provided inside the first limiting block. A limiting sleeve for assisting in limiting the end of the blank part is provided at the bottom of the mounting frame. Four groups of second limiting blocks for limiting the end of the blank part are circumferentially arranged inside the limiting sleeve. The second limiting blocks are elastically connected to the limiting sleeve through springs. A damper for assisting in rebounding is provided inside the spring. A second protective layer for protecting the blank part is provided inside the second limiting block. By setting the second limiting blocks that use the spring rebounding effect to limit the end of the blank part, blank parts with different thicknesses at the end can be adapted.

[0009] Preferably, the second clamping assembly includes support blocks, second telescopic cylinders, second electric push rods, first clamping plates, and second clamping plates. There are two groups of support blocks arranged symmetrically. At the upper end of the support blocks, there are second telescopic cylinders for controlling the movement of the second electric push rods. At the mutually approaching ends of the two groups of second electric push rods, there are respectively a first clamping plate and a second clamping plate for clamping and fixing both ends of the connecting rod. The first clamping plate and the second clamping plate are both adjustably connected to the second telescopic cylinder through the second electric push rod. By setting the second telescopic cylinder, the two groups of second electric push rods can be controlled to move relatively, so that the second electric push rods drive the first clamping plate and the second clamping plate to move synchronously to clamp both ends of the connecting rod.

[0010] Preferably, the third clamping assembly includes support frames, third driving motors, turntables, first connecting blocks, first swing arms, second swing arms, fourth driving motors, mounting blocks, grippers, fifth driving motors, and third protective layers. There are two groups of support frames arranged symmetrically. At the lower ends of the two groups of support frames, there are third driving motors for driving the turntables to rotate. At the upper ends of the support frames, there are turntables for rotation. The third driving motor, the fourth driving motor, and the fifth driving motor are all provided with output shafts. The output shaft of the third driving motor passes through the lower end of the support frame and extends to the upper end to drive the turntable to rotate. By setting the third driving motor, the turntable can be driven to rotate, and thus the turntable can drive the gripper to rotate to adjust the angle.

[0011] Preferably, the turntable is rotatably connected to the first swing arm through the first connecting block, the first swing arm is rotatably connected to the mounting block through the second swing arm. At the end of the mounting block away from the second swing arm, there is a gripper for clamping and fixing related processing parts. The output shaft of the fourth driving motor passes through the outside of the first connecting block and the first swing arm and extends to the inside to drive the first swing arm and the second swing arm to rotate respectively. The output shaft of the fifth driving motor passes through the outside of the mounting block and extends to the inside to drive the gripper to rotate. Inside the gripper, there is a third protective layer for protecting related processing parts. By setting the fourth driving motor, the first swing arm and the second swing arm can be driven to swing up and down to adjust the distance between the two grippers. By setting the fifth driving motor, the gripper can be driven to rotate up and down to adjust the clamping tightness of the gripper.

[0012] The beneficial effects of the present utility model:

[0013] 1. Compared with the traditional clamping device for engine connecting rod processing, which is usually only applicable to connecting rods of fixed specifications and sizes and is not convenient for corresponding adjustment according to different connecting rods, resulting in limited use effects. By setting the first clamping component, the second clamping component and the third clamping component, they can be respectively used to clamp different connecting rod processing parts, and the first clamping component, the second clamping component and the third clamping component are all adjustable structures and can be adjusted correspondingly according to different connecting rods, with stronger applicability. By setting the first clamping component, it can be used to clamp blank parts. By setting the second limiting block, the end of the blank part can be limited. By setting the first limiting block, the part of the blank part near the end can be clamped and fixed. Through the dual cooperation of the first limiting block and the second limiting block, the blank part is not easy to shake during the processing, and the clamping effect is good. By setting the first limiting block controlled by an adjusting bolt to adjust and the second limiting block that limits the end of the blank part by the spring rebound effect, it can be applicable to blank parts with different thicknesses at the end. By setting the first driving motor, it can drive the bidirectional threaded rod to rotate, and then the bidirectional threaded rod can drive the slider to slide along its surface to adjust the distance between the two clamping modules, so that the clamping module can be used to clamp blank parts of different lengths. By setting the first telescopic cylinder, it can control the first electric push rod to move up and down, so that the first electric push rod can drive the clamping module to move up and down to adjust its height. By setting the second driving motor, it can drive the rotating shaft to rotate, so that the rotating shaft can drive the blank part to rotate as a whole during the processing to adjust the angle.

[0014] 2. By setting the second clamping component, it can be directly used to clamp and fix the connecting rod to maintain its stability during the processing. By setting the second telescopic cylinder, it can control the two second electric push rods to move relatively, so that the second electric push rods drive the first clamping plate and the second clamping plate to move synchronously to clamp the two ends of the connecting rod. By setting the third clamping component, it can clamp and fix the connecting rod or related processing parts from another angle. By setting two relatively arranged grippers, the connecting rod or related processing parts can be clamped and fixed. By setting the third driving motor, it can drive the turntable to rotate, and then the turntable can drive the gripper to rotate to adjust the angle. By setting the fourth driving motor, it can drive the first swing arm and the second swing arm to swing up and down to adjust the distance between the two grippers. By setting the fifth driving motor, it can drive the gripper to rotate up and down to adjust the clamping tightness of the gripper, so that the gripper can be used to clamp connecting rods and related processing parts of different sizes or thicknesses, and the gripper that can adjust the angle, distance, position and clamping tightness is more convenient and practical. Description of the Drawings

[0015] Figure 1The overall schematic diagram of the clamping device for engine connecting rod processing of the present utility model is shown;

[0016] Figure 2 The schematic diagram of the first clamping component in the clamping device for engine connecting rod processing of the present utility model is shown;

[0017] Figure 3 The schematic diagram of the clamping module in the clamping device for engine connecting rod processing of the present utility model is shown;

[0018] Figure 4 The schematic diagram of the spring in the clamping device for engine connecting rod processing of the present utility model is shown;

[0019] Figure 5 The schematic diagram of the second clamping component in the clamping device for engine connecting rod processing of the present utility model is shown;

[0020] Figure 6 The schematic diagram of the third clamping component in the clamping device for engine connecting rod processing of the present utility model is shown.

[0021] Explanation of reference numerals: 1, workbench; 2, first clamping component; 3, second clamping component; 4, third clamping component; 5, blank part; 6, connecting rod; 7, foot column; 8, chute; 201, first driving motor; 202, bidirectional threaded rod; 203, slider; 204, first telescopic cylinder; 205, first electric push rod; 206, clamping module; 207, second driving motor; 208, rotating shaft; 209, mounting frame; 210, collar; 211, adjusting bolt; 212, first limit block; 213, first protective layer; 214, limit sleeve; 215, second limit block; 216, second protective layer; 217, spring; 218, damper; 301, support block; 302, second telescopic cylinder; 303, second electric push rod; 304, first clamping plate; 305, second clamping plate; 401, support frame; 402, third driving motor; 403, turntable; 404, first connecting block; 405, first swing arm; 406, second swing arm; 407, fourth driving motor; 408, mounting block; 409, gripper; 410, fifth driving motor; 411, third protective layer. Detailed implementation manners

[0022] The present utility model will be further described below with reference to the accompanying drawings and embodiments.

[0023] Please refer to Figure 1, the present utility model provides an embodiment: a clamping device for engine connecting rod processing, including a workbench 1, a first clamping assembly 2, a second clamping assembly 3, a third clamping assembly 4, a blank part 5, a connecting rod 6 and a foot column 7. A chute 8 for the sliding of the first clamping assembly 2 is provided in the middle of the upper end of the workbench 1. The first clamping assembly 2 for clamping and fixing the blank part 5 is installed in the chute 8. The blank part 5 for processing is clamped on the first clamping assembly 2. Two groups of second clamping assemblies 3 for clamping and fixing the connecting rod 6 are symmetrically arranged on the front and rear sides of the upper end of the workbench 1. The connecting rod 6 is clamped between the two groups of second clamping assemblies 3. A third clamping assembly 4 for clamping and fixing the connecting rod 6 or related processing parts is provided above the second clamping assembly 3. Foot columns 7 for support are arranged around the four corners of the lower end of the workbench 1.

[0024] Please refer to Figure 2 , in this embodiment, the first clamping assembly 2 includes a first driving motor 201, a bidirectional threaded rod 202, sliders 203, a first telescopic cylinder 204, a first electric push rod 205 and a clamping module 206. Two groups of sliders 203 for sliding are symmetrically sleeved on the outer side of the bidirectional threaded rod 202. The first driving motor 201 drives the bidirectional threaded rod 202 to rotate to drive the sliders 203 to slide along its surface. A first telescopic cylinder 204 for controlling the up and down movement of the first electric push rod 205 is provided at the upper end of the slider 203. A clamping module 206 for clamping and fixing the blank part 5 is provided at the upper end of the first electric push rod 205. The clamping module 206 is adjustably connected to the first telescopic cylinder 204 through the first electric push rod 205. By setting the first telescopic cylinder 204, the up and down movement of the first electric push rod 205 can be controlled, so that the first electric push rod 205 can drive the clamping module 206 to move up and down to adjust its height.

[0025] Please refer to Figures 3-4, in this embodiment, the clamping module 206 includes a second driving motor 207, a rotating shaft 208, a mounting bracket 209, a collar 210, an adjusting bolt 211, a first limiting block 212, a first protective layer 213, a limiting sleeve 214, a second limiting block 215, a second protective layer 216, a spring 217 and a damper 218. The second driving motor 207 is rotatably connected to the mounting bracket 209 through the rotating shaft 208. The second driving motor 207 drives the mounting bracket 209 to rotate by driving the rotation of the rotating shaft 208. A collar 210 for mounting the first limiting block 212 is provided at one end of the mounting bracket 209 away from the rotating shaft 208. Four groups of first limiting blocks 212 for clamping and fixing the blank part 5 are provided around the inner side of the collar 210. Four groups of adjusting bolts 211 matching the first limiting blocks 212 are provided around the outer side of the collar 210. The adjusting bolts 211 pass through the outer side of the collar 210 and extend to the inner side to adjust the position of the first limiting block 212. By setting the adjusting bolts 211, the movement of the first limiting block 212 can be controlled, so that the tightening degree of the clamping by the first limiting block 212 can be adjusted by screwing the adjusting bolts 211. A first protective layer 213 for protecting the blank part 5 is provided on the inner side of the first limiting block 212. A limiting sleeve 214 for assisting in limiting the end of the blank part 5 is provided at the bottom of the mounting bracket 209. Four groups of second limiting blocks 215 for limiting the end of the blank part 5 are provided around the inner side of the limiting sleeve 214. The second limiting blocks 215 are elastically connected to the limiting sleeve 214 through springs 217. A damper 218 for assisting in rebounding is provided inside the springs 217. A second protective layer 216 for protecting the blank part 5 is provided on the inner side of the second limiting blocks 215. By setting the second limiting blocks 215 that use the rebounding action of the springs 217 to limit the end of the blank part 5, blank parts 5 with different thicknesses at the end can be adapted.

[0026] Please refer to Figure 5 , in this embodiment, the second clamping assembly 3 includes a support block 301, a second telescopic cylinder 302, a second electric push rod 303, a first clamping plate 304 and a second clamping plate 305. Two groups of support blocks 301 are symmetrically provided. A second telescopic cylinder 302 for controlling the movement of the second electric push rod 303 is provided at the upper end of the support block 301. First clamping plates 304 and second clamping plates 305 for clamping and fixing both ends of the connecting rod 6 are respectively provided at the ends of the two second electric push rods 303 close to each other. The first clamping plates 304 and the second clamping plates 305 are both adjustably connected to the second telescopic cylinder 302 through the second electric push rods 303. By setting the second telescopic cylinder 302, the relative movement of the two second electric push rods 303 can be controlled, so that the second electric push rods 303 drive the first clamping plates 304 and the second clamping plates 305 to move synchronously to clamp both ends of the connecting rod 6.

[0027] Please refer to Figure 6, in this embodiment, the third clamping assembly 4 includes a support frame 401, a third driving motor 402, a turntable 403, a first connecting block 404, a first swing arm 405, a second swing arm 406, a fourth driving motor 407, a mounting block 408, a gripper 409, a fifth driving motor 410 and a third protective layer 411. There are two sets of support frames 401 arranged symmetrically. At the lower ends of the two sets of support frames 401, there are third driving motors 402 for driving the turntable 403 to rotate. At the upper ends of the support frames 401, there is a turntable 403 for rotation. The third driving motor 402, the fourth driving motor 407 and the fifth driving motor 410 are all provided with output shafts. The output shaft of the third driving motor 402 passes through the lower end of the support frame 401 and extends to the upper end to drive the turntable 403 to rotate. By setting the third driving motor 402, the turntable 403 can be driven to rotate, and then the turntable 403 can drive the gripper 409 to rotate to adjust the angle. The turntable 403 is rotatably connected to the first swing arm 405 through the first connecting block 404. The first swing arm 405 is rotatably connected to the mounting block 408 through the second swing arm 406. At one end of the mounting block 408 away from the second swing arm 406, there is a gripper 409 for clamping and fixing relevant processed parts. The output shaft of the fourth driving motor 407 passes through the outside of the first connecting block 404 and the first swing arm 405 and extends to the inside to drive the first swing arm 405 and the second swing arm 406 to rotate respectively. The output shaft of the fifth driving motor 410 passes through the outside of the mounting block 408 and extends to the inside to drive the gripper 409 to rotate. Inside the gripper 409, there is a third protective layer 411 for protecting relevant processed parts. By setting the fourth driving motor 407, the first swing arm 405 and the second swing arm 406 can be driven to swing up and down to adjust the distance between the two grippers 409. By setting the fifth driving motor 410, the gripper 409 can be driven to rotate up and down to adjust the clamping tightness of the gripper 409.

[0028] When working, first place the workbench 1 on a flat ground, and then select the corresponding clamping method according to the actual connecting rod 6 and relevant blank parts 5 to be processed;

[0029] When it is necessary to process the blank part 5, the blank part 5 is clamped and fixed by the first clamping assembly 2. First, insert both ends of the blank part 5 between the four second limit blocks 215 inside the limit sleeve 214, and use the elastic return of the spring 217 to clamp the ends of the second limit blocks 215;

[0030] Then, the first driving motor 201 is used to drive the bidirectional threaded rod 202 to rotate, so that the bidirectional threaded rod 202 drives the slider 203 to slide along its surface to adjust the distance between the two clamping modules 206, so that the two clamping modules 206 abut against both ends of the blank part 5 to limit it;

[0031] After that, turn the adjusting bolt 211 to move the four groups of first limit blocks 212 towards the side close to the blank part 5 until the first limit blocks 212 tightly clamp the part of the blank part 5 near the end;

[0032] During the processing, the second driving motor 207 drives the rotating shaft 208 to rotate, so that the rotating shaft 208 drives the blank part 5 to rotate as a whole during the processing to adjust the angle and process different parts of the blank part 5;

[0033] When it is necessary to clamp and fix the single connecting rod 6, directly place the connecting rod 6 between the first clamping plate 304 and the second clamping plate 305, and control the two groups of second electric push rods 303 to move relatively through the second telescopic cylinder 302, so that the second electric push rods 303 drive the first clamping plate 304 and the second clamping plate 305 to move synchronously to clamp both ends of the connecting rod 6;

[0034] When it is necessary to process another angle of the connecting rod 6 or process related connecting parts, clamp and fix them through the third clamping assembly 4. The third driving motor 402 drives the turntable 403 to rotate, so that the turntable 403 drives the gripper 409 to rotate to adjust the angle, and then set the fourth driving motor 407 to drive the first swing arm 405 and the second swing arm 406 to swing up and down to adjust the distance between the two grippers 409;

[0035] Then place the connecting rod 6 or related processing parts between the two grippers 409 through the gripper 409, and drive the gripper 409 to rotate up and down through the fifth driving motor 410 to adjust the clamping tightness of the gripper 409 to clamp and fix the connecting rod 6 or related parts.

[0036] Through the above steps, the staff first place the workbench 1 on a stable ground, and then select the corresponding clamping method according to the actual connecting rod 6 to be processed and the related blank parts 5. When it is necessary to process the blank parts 5, the first clamping component 2 is used to clamp and fix the blank parts 5. First, insert both ends of the blank parts 5 between the four groups of second limit blocks 215 inside the limit sleeve 214, and use the elastic force of the spring 217 to clamp the ends of the second limit blocks 215. Then, drive the bidirectional threaded rod 202 to rotate by the first driving motor 201, so that the bidirectional threaded rod 202 drives the slider 203 to slide along its surface to adjust the distance between the two clamping modules 206, so that the two clamping modules 206 abut against both ends of the blank parts 5 to limit them. After that, turn the adjusting bolt 211 to make the four groups of first limit blocks 212 move towards the side close to the blank parts 5 until the first limit blocks 212 tightly clamp the parts of the blank parts 5 close to the ends. Through the dual cooperation of the first limit blocks 212 and the second limit blocks 215, the blank parts 5 are not easy to shake during the processing, and the clamping effect is good. During the processing, drive the rotating shaft 208 to rotate by the second driving motor 207, so that the rotating shaft 208 drives the blank parts 5 to rotate as a whole during the processing to adjust the angle and process different parts of the blank parts 5. When it is necessary to clamp and fix the single connecting rod 6, directly place the connecting rod 6 between the first clamping plate 304 and the second clamping plate 305, and control the two second electric push rods 303 to move relatively by the second telescopic cylinder 302, so that the second electric push rods 303 drive the first clamping plate 304 and the second clamping plate 305 to move synchronously to clamp both ends of the connecting rod 6. When it is necessary to process another angle of the connecting rod 6 or process the related connecting parts, clamp and fix them by the third clamping component 4. Drive the turntable 403 to rotate by the third driving motor 402, so that the turntable 403 drives the gripper 409 to rotate to adjust the angle. Then, set the fourth driving motor 407 to drive the first swing arm 405 and the second swing arm 406 to swing up and down to adjust the distance between the two grippers 409. Then, place the connecting rod 6 or related processing parts between the two grippers 409, and drive the gripper 409 to rotate up and down by the fifth driving motor 410 to adjust the clamping tightness of the gripper 409 to clamp and fix the connecting rod 6 or related parts. By setting the fifth driving motor 410 to drive, the gripper 409 can rotate up and down to adjust the clamping tightness of the gripper 409, so that the gripper 409 can be used to clamp connecting rods 6 and related processing parts of different sizes or thicknesses. The gripper 409 that can adjust the angle, distance, position and clamping tightness is more convenient and practical. By setting the first clamping component 2, the second clamping component 3 and the third clamping component 4, they can be used to clamp different connecting rod 6 processing parts respectively.Moreover, the first clamping assembly 2, the second clamping assembly 3 and the third clamping assembly 4 are all adjustable structures and can be adjusted correspondingly according to different connecting rods 6, with stronger applicability.

[0037] The embodiments of the present utility model have been described in detail above in conjunction with the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the gist of the present utility model.

Claims

1. A clamping device for machining an engine connecting rod, comprising a workbench (1); characterized in that: The workbench (1) further comprises a first clamping assembly (2), a second clamping assembly (3), a third clamping assembly (4), a blank part (5), a connecting rod (6) and a foot column (7). A slide groove (8) for sliding the first clamping assembly (2) is provided in the middle of the upper end of the workbench (1). The first clamping assembly (2) for clamping and fixing the blank part (5) is installed in the slide groove (8). The blank part (5) for processing is clamped on the first clamping assembly (2). Two groups of second clamping assemblies (3) for clamping and fixing the connecting rod (6) are symmetrically arranged on the upper side of the workbench (1) in a front-to-back manner. The connecting rod (6) is clamped between the two groups of second clamping assemblies (3). A third clamping assembly (4) for clamping and fixing the connecting rod (6) or related processing parts is arranged above the second clamping assembly (3). The four corners of the lower end of the workbench (1) are surrounded by foot columns (7) for support.

2. The clamping device for machining an engine connecting rod according to claim 1, characterized in that: The first clamping assembly (2) comprises a first driving motor (201), a bidirectional threaded rod (202), a slider (203), a first telescopic cylinder (204), a first electric push rod (205) and a clamping module (206); two groups of sliders (203) for sliding are symmetrically sleeved on the outer side of the bidirectional threaded rod (202); the first driving motor (201) drives the bidirectional threaded rod (202) to rotate and drives the sliders (203) to slide along the surface thereof; the upper end of the slider (203) is provided with a first telescopic cylinder (204) for controlling the first electric push rod (205) to move up and down; the upper end of the first electric push rod (205) is provided with a clamping module (206) for clamping and fixing the blank part (5); the clamping module (206) and the first telescopic cylinder (204) are adjustable and connected via the first electric push rod (205).

3. The clamping device for machining an engine connecting rod according to claim 2, characterized in that: The clamping module (206) includes a second driving motor (207), a rotating shaft (208), a mounting frame (209), a ring sleeve (210), an adjusting bolt (211), a first limiting block (212), a first protective layer (213), a limiting sleeve (214), a second limiting block (215), a second protective layer (216), a spring (217) and a damper (218). The second driving motor (207) is rotatably connected to the mounting frame (209) via the rotating shaft (208). The second driving motor (207) is rotatably connected to the mounting frame (209) via the driving shaft (208). The mounting frame (209) is driven to rotate, and a ring sleeve (210) for mounting a first limit block (212) is provided at one end of the mounting frame (209) away from the rotating shaft (208), and four groups of first limit blocks (212) for clamping and fixing the blank part (5) are arranged around the inner side of the ring sleeve (210), and four groups of adjusting bolts (211) matching the first limit blocks (212) are arranged around the outer side of the ring sleeve (210), and the adjusting bolts (211) pass through the outer side of the ring sleeve (210) and extend to the inner side to adjust the position of the first limit block (212).

4. The clamping device for machining an engine connecting rod according to claim 3, characterized in that: A first protective layer (213) for protecting the rough part (5) is provided on the inner side of the first limiting block (212); a limiting sleeve (214) for assisting in limiting the end of the rough part (5) is provided on the bottom of the mounting frame (209); four groups of second limiting blocks (215) for limiting the end of the rough part (5) are provided around the inner side of the limiting sleeve (214); the second limiting blocks (215) and the limiting sleeve (214) are elastically connected via a spring (217); a damper (218) for assisting in rebound is provided inside the spring (217); and a second protective layer (216) for protecting the rough part (5) is provided on the inner side of the second limiting block (215).

5. The clamping device for machining an engine connecting rod according to claim 1, characterized in that: The second clamping assembly (3) comprises a support block (301), a second telescopic cylinder (302), a second electric push rod (303), a first clamping plate (304) and a second clamping plate (305). The support block (301) is symmetrically provided with two groups. The upper end of the support block (301) is provided with a second telescopic cylinder (302) for controlling the movement of the second electric push rod (303). The ends of the two groups of second electric push rods (303) close to each other are respectively provided with a first clamping plate (304) and a second clamping plate (305) for clamping and fixing the two ends of the connecting rod (6). The first clamping plate (304) and the second clamping plate (305) are both adjustable and connected to the second telescopic cylinder (302) through the second electric push rod (303).

6. The clamping device for machining an engine connecting rod according to claim 1, characterized in that: The third clamping assembly (4) comprises a support frame (401), a third driving motor (402), a rotating disk (403), a first connecting block (404), a first swing arm (405), a second swing arm (406), a fourth driving motor (407), a mounting block (408), a gripper (409), a fifth driving motor (410) and a third protective layer (411); the support frame (401) is symmetrically provided with two groups, the lower ends of the two groups of support frames (401) are both provided with a third driving motor (402) for driving the rotating disk (403) to rotate, the upper end of the support frame (401) is provided with a rotating disk (403) for rotating, the third driving motor (402), the fourth driving motor (407) and the fifth driving motor (410) are all provided with output shafts, and the output shaft of the third driving motor (402) passes through the lower end of the support frame (401) and extends to the upper end to drive the rotating disk (403) to rotate.

7. The clamping device for machining an engine connecting rod according to claim 6, characterized in that: The turntable (403) is rotatably connected to the first swing arm (405) via the first connecting block (404); the first swing arm (405) is rotatably connected to the mounting block (408) via the second swing arm (406); a gripper (409) for clamping and fixing related processing parts is provided at one end of the mounting block (408) away from the second swing arm (406); an output shaft of a fourth driving motor (407) passes through the first connecting block (404) and the outer side of the first swing arm (405) and extends to the inner side to respectively drive the first swing arm (405) and the second swing arm (406) to rotate; an output shaft of a fifth driving motor (410) passes through the outer side of the mounting block (408) and extends to the inner side to drive the gripper (409) to rotate; and a third protective layer (411) for protecting related processing parts is provided on the inner side of the gripper (409).

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