CN-117817554-B - Crankshaft main journal center frame

CN117817554BCN 117817554 BCN117817554 BCN 117817554BCN-117817554-B

Abstract

The invention discloses a crankshaft main journal center frame, wherein an extending component is arranged at the upper part of the center frame and is connected with an upper supporting arm and a lower supporting arm, the upper supporting arm and the lower supporting arm are respectively connected with a first positioning component and a second positioning component, the first positioning component and the second positioning component are abutted with a crankshaft main journal, an upper supporting arm is connected with the lower part of the center frame in an axial manner, a sliding rail is arranged above the center frame and is connected with a sliding seat, a hydraulic cylinder is arranged on the sliding seat, a piston rod of the hydraulic cylinder is connected with a third positioning component, and the third positioning component is abutted with the crankshaft main journal.

Inventors

ZHAO DEJUN
ZHANG XIAOYU

Assignees

辽宁五一八内燃机配件有限公司

Dates

Publication Date: 20260508
Application Date: 20220929

Claims (4)

1. The crankshaft main journal center frame is characterized in that a center frame is arranged, an extending component is arranged at the upper part of the center frame and connected with an upper supporting arm and a lower supporting arm, the upper supporting arm and the lower supporting arm are respectively connected with a first positioning component and a second positioning component, the first positioning component and the second positioning component are in butt joint with a crankshaft main journal, an upper supporting arm is in butt joint with the lower part of the center frame, a lower supporting arm is in shaft joint with the center frame, a sliding rail is arranged above the center frame and connected with a sliding seat, a hydraulic cylinder is arranged on the sliding seat, a piston rod of the hydraulic cylinder is connected with a third positioning component, and the third positioning component is in butt joint with the crankshaft main journal; the first extending component comprises a servo motor, the servo motor is connected with one end of a speed reducer, the other end of the speed reducer is connected with one end of a coupler, the other end of the coupler is connected with one end of a ball screw, the other end of the ball screw is connected with one end of a nut, the other end of the nut is fixed with one end of a nut connecting piece, a transmission key is arranged on the nut connecting piece, the other end of the nut connecting piece is connected with a movable joint bolt, the upper supporting arm is connected with the movable joint bolt in a shaft mode, the second extending component is consistent with the first extending component in structure, the first positioning component comprises a middle pressing block arranged on the upper supporting arm, the middle lower pressing block is connected with the middle pressing block and the baffle, a blind hole is formed in the middle pressing block, a floating shaft is arranged in the blind hole, a gasket is fixedly arranged at the upper end of the floating shaft, the lower end of the floating shaft is a cylinder, the structure of the blind hole and the cylinder of the floating shaft are arranged along with the shape, and a gap is formed between the gasket and the middle pressing block.
2. The crankshaft main journal center frame according to claim 1, wherein the second positioning assembly comprises a second middle lower pressing block, the second middle lower pressing block is arranged on a lower supporting arm, the lower supporting arm is connected to the center frame through a cylindrical pin, a third middle lower pressing block is arranged on the second middle lower pressing block, a blind hole is formed in the third middle lower pressing block, a baffle is arranged at the end of the third middle lower pressing block, a second floating shaft is arranged in the blind hole, a second gasket is arranged on the second floating shaft, and a gap is formed between the second gasket and the third middle lower pressing block.
3. The crankshaft main journal center frame according to claim 1, wherein the third positioning assembly comprises a shaft connecting block, the lower end of the shaft connecting block is connected with the end of the sliding seat in a shaft mode, the upper end of the shaft connecting block is connected with the end of the piston rod in a shaft mode, the shaft connecting block is connected with a fourth middle pressing block, a blind hole is formed in the fourth middle pressing block, a third baffle is arranged at the end of the fourth middle pressing block, a third floating shaft is arranged in the blind hole, a third gasket is arranged on the third floating shaft, and a gap is formed between the third gasket and the fourth middle pressing block.
4. The crankshaft main journal center frame according to claim 1, wherein a bearing sleeve is sleeved outside the ball screw of the first extending assembly, the bearing sleeve is sleeved with a bearing, one side of an inner ring of the bearing is abutted with the bearing sleeve, and the other side of the inner ring of the bearing is abutted with a locking nut screwed on the bearing sleeve.

Description

Crankshaft main journal center frame Technical Field The invention relates to the field of machine manufacturing, in particular to a rapid clamping and positioning device for shaft workpieces. Background The machining precision requirement of the crankshaft is extremely high, because the crankshaft belongs to shaft parts, care is needed during clamping, if the clamping force is too large, the crankshaft is stressed, the cylindricity of the surface of the crankshaft is influenced, the service life of the crankshaft in actual work is influenced, meanwhile, when the clamping is incorrect, the clamping mode that the clamp is in point contact with the outer surface of the crankshaft is caused, the service life of the crankshaft is also influenced, and the damage to the crankshaft is extremely large, so that the crankshaft clamp is high in clamping precision and high in flexibility, and the clamping force can be adjusted, and has the clamping position adjustable function. Disclosure of Invention In order to solve the problems, the invention discloses a crankshaft main journal center frame. The specific technical scheme is as follows: The utility model provides a bent axle main journal center frame sets up a center frame, the upper portion of center frame sets up and stretches out the subassembly, stretch out the subassembly and be connected with upper supporting arm, lower supporting arm, upper supporting arm and lower supporting arm are connected with first locating component and second locating component respectively, first locating component and second locating component and bent axle main journal butt, upper supporting arm meets the lower part of center frame, lower supporting arm with center frame coupling, the top of center frame sets up the slide rail, the slide rail is connected with the sliding seat, set up the pneumatic cylinder on the sliding seat, the piston rod and the third locating component of pneumatic cylinder are connected, third locating component and bent axle main journal butt. The first extending component and the second extending component are respectively connected with the upper supporting arm and the lower supporting arm, the first extending component is arranged on the upper portion of the center frame, and the second extending component is arranged on the lower portion of the center frame. The first stretching assembly comprises a servo motor, the servo motor is connected with one end of a speed reducer, the other end of the speed reducer is connected with one end of a coupler, the other end of the coupler is connected with one end of a ball screw, the other end of the ball screw is connected with one end of a nut, the other end of the nut is fixed with one end of a nut connecting piece, a transmission key is arranged on the nut connecting piece, the other end of the nut connecting piece is connected with a movable joint bolt, the upper supporting arm is connected with the movable joint bolt in a shaft mode, and the second stretching assembly is consistent with the first stretching assembly in structure. The first positioning component comprises a middle pressing block arranged on the upper supporting arm, the middle pressing block is connected with the middle pressing block and the baffle, a blind hole is formed in the middle pressing block, a floating shaft is arranged in the blind hole, a gasket is fixedly arranged at the upper end of the floating shaft, the lower end of the floating shaft is a cylinder, the floating shaft can rotate in the blind hole for guaranteeing, the structure of the blind hole and the cylinder of the floating shaft are arranged along with the shape, and a gap is formed between the gasket and the middle pressing block. The second positioning assembly comprises a second middle pressing block, the second middle pressing block is arranged on a lower supporting arm, the lower supporting arm is connected to the center frame through a cylindrical pin, a third middle pressing block is arranged on the second middle pressing block, a blind hole is formed in the third middle pressing block, a baffle is arranged at the end of the blind hole, a second floating shaft is arranged in the blind hole, a second gasket is arranged on the second floating shaft, and a gap is formed between the second gasket and the third middle pressing block. The third positioning assembly comprises a shaft connecting block, the lower end of the shaft connecting block is connected with the end part of the sliding seat in a shaft mode, the upper end of the shaft connecting block is connected with the end part of the piston rod in a shaft mode, the shaft connecting block is connected with a fourth middle pressing block, a blind hole is formed in the fourth middle pressing block, a third baffle is arranged at the end part of the fourth middle pressing block, a third floating shaft is arranged in the blind hole, and a third gasket is arranged on the third floating shaft. In order to further enable t