CN-122007872-A - Diesel engine and main bearing cap assembly device

CN122007872ACN 122007872 ACN122007872 ACN 122007872ACN-122007872-A

Abstract

The invention relates to the technical field of main bearing cap assembly, and discloses a diesel engine and main bearing cap assembly device which comprises an assembly device body, wherein the assembly device body comprises a base station, a connecting column is fixedly arranged on the base station, a first hydraulic cylinder is fixedly arranged on the connecting column, a supporting plate is fixedly arranged at the telescopic end of the first hydraulic cylinder, a clamping assembly unit comprises a workbench fixedly arranged on the supporting plate, a supporting seat is fixedly arranged on one side of the workbench, a shaft rotation test unit is arranged on the supporting seat, and the shaft rotation test unit is used for performing rotation test on an assembled crankshaft and detecting whether the rotation of the crankshaft is blocked. According to the invention, the assembled crankshaft can be subjected to rotation test through the shaft rotation test unit, the second motor drives the crankshaft to rotate, whether the rotation of the crankshaft is blocked or not is detected, the problem of crankshaft clamping stagnation caused by poor assembly is effectively avoided, and the primary product yield is improved.

Inventors

WEN HONGYAN
Wen Caoyuan
WANG BIN
FAN CUNRONG
ZHANG XINKAI

Assignees

淄博炜祥船舶设备有限公司

Dates

Publication Date: 20260512
Application Date: 20260306

Claims (10)

1. A diesel engine and main bearing cap assembly device, comprising: The assembly device comprises an assembly device body, wherein the assembly device body comprises a base station, a connecting column is fixedly arranged on the base station, a movable frame and a fixed cylinder are arranged on the connecting column in a sliding manner, an output shaft of the cylinder is fixedly connected with the movable frame, a plurality of groups of assembly part screwing devices are arranged on the movable frame, a bearing table is arranged below the plurality of groups of assembly part screwing devices, a first hydraulic cylinder is fixedly arranged on the connecting column, and a supporting plate is fixedly arranged at a telescopic end of the first hydraulic cylinder; The diesel engine body comprises a diesel engine cylinder body, a crankshaft, a key groove and a main bearing cap, wherein the crankshaft is assembled in a bearing groove of the diesel engine cylinder body, the key groove is formed in a driving end of the crankshaft, the main bearing cap is correspondingly assembled at a joint of the crankshaft and the bearing groove, and a connecting bolt is screwed and fixed through a fitting screwing device to realize limiting assembly of the crankshaft; The clamping assembly unit comprises a workbench fixedly arranged on the supporting plate, a supporting seat is fixedly arranged on one side of the workbench, and a shaft rotation test unit is arranged on the supporting seat; the shaft rotation test unit is used for carrying out rotation test on the assembled crankshaft and detecting whether the rotation of the crankshaft is blocked, the shaft rotation test unit comprises a third hydraulic cylinder fixedly installed on a supporting seat, a sliding frame is fixedly installed at the telescopic end of the third hydraulic cylinder, a second motor is fixedly installed on the sliding frame, a locking mechanism is arranged at the output shaft of the second motor and used for locking and fixing the end part of the crankshaft, so that the second motor can drive the crankshaft to rotate, and rotation blocking detection is completed.
2. The device for assembling the diesel engine and the main bearing cap according to claim 1, wherein the first connecting seats are fixedly installed on two sides of the workbench, the second connecting seats are rotatably connected to the first connecting seats through rotating shafts, the two groups of the second connecting seats are respectively and fixedly installed on two sides of the supporting plate, the first motor is fixedly installed on one group of the second connecting seats, and an output shaft of the first motor is connected with one group of rotating shafts and is used for driving the workbench to rotate around the rotating shafts so as to realize overturning positioning of the diesel engine cylinder body.
3. The diesel engine and main bearing cap assembly device according to claim 1, wherein clamping assemblies are symmetrically arranged on two sides of the inside of the workbench, the clamping assemblies comprise clamping blocks arranged on two sides of the inside of the workbench, clamping plates are symmetrically and fixedly arranged on the upper side and the lower side of the clamping blocks, the clamping plates are matched and attached with the upper surface and the lower surface of the diesel engine cylinder body and are used for carrying out bearing limit on the upper side and the lower side of the diesel engine cylinder body, a second hydraulic cylinder is fixedly arranged on two sides of the workbench, and the telescopic ends of the second hydraulic cylinder are fixedly connected with the clamping blocks and are used for driving the two groups of clamping blocks to move relatively or reversely.
4. The assembly device for the diesel engine and the main bearing cap according to claim 1, wherein a torque detection sensor is fixedly installed between the second motor and the locking mechanism, the torque detection sensor is used for detecting a torque value when the second motor drives the crankshaft to rotate in real time, judging whether the rotation of the crankshaft is blocked or not through the change of the torque value, and judging that the rotation of the crankshaft is blocked when the torque value exceeds a preset threshold value, and prompting abnormal assembly.
5. The diesel engine and main bearing cap assembly device according to claim 4, wherein the locking mechanism comprises a locking sleeve fixedly installed at a detection end of the torque detection sensor, a locking groove matched with the end of the crankshaft is formed in one end, far away from the torque detection sensor, of the locking sleeve, a plurality of groups of locking blocks are uniformly distributed in an annular shape in the locking groove, a pressing block used for controlling the expansion and the contraction of the locking blocks is arranged in the locking sleeve, and the locking blocks are extruded by the pressing block under a normal state, so that the locking blocks are limited in contraction.
6. The diesel engine and main bearing cap assembly device according to claim 5, wherein guide rods are symmetrically and fixedly installed on the locking blocks, the guide rods are arranged along the radial direction of the locking sleeve, the guide rods penetrate through the side wall of the locking sleeve and are in sliding connection with the locking sleeve, and a first spring is sleeved outside the guide rods.
7. The diesel engine and main bearing cap assembly device according to claim 5, wherein a movable cavity communicated with the locking groove is formed in the locking sleeve, a partition plate is fixedly installed in the movable cavity, a sliding shaft is slidably connected in the partition plate along the axial direction of the locking sleeve, the pressing block is fixedly installed at one end of the sliding shaft penetrating through the locking groove, and a second spring is sleeved outside the sliding shaft.
8. The diesel engine and main bearing cap assembly device according to claim 7, wherein the pressing block is arranged in a conical structure, and one end of the locking block, which is close to the pressing block, is arranged in an inclined manner matched with the conical surface of the pressing block.
9. The diesel engine and main bearing cap assembly device according to claim 1, wherein a positioning groove is formed in the upper surface of the diesel engine cylinder body in a diagonal mode, a first positioning shaft is fixedly arranged at a position, corresponding to the positioning groove, of the movable frame, and the positioning groove and the first positioning shaft are mutually matched and clamped and used for accurately positioning the diesel engine cylinder body.
10. The diesel engine and main bearing cap assembly device according to claim 9, wherein a second positioning shaft is fixedly arranged on the bearing table in a diagonal manner, and when the upper surface of the diesel engine cylinder body is placed downwards, the positioning groove and the second positioning shaft are mutually matched and clamped, so that the diesel engine cylinder body is placed and positioned, and the displacement during placement is prevented.

Description

Diesel engine and main bearing cap assembly device Technical Field The invention relates to the technical field of main bearing cap assembly, in particular to a device for assembling a diesel engine and a main bearing cap. Background Diesel engines are widely used as important power equipment in the fields of automobiles, ships, engineering machinery and the like. One of the core components is a crankshaft, and the assembly quality of the crankshaft and the main bearing cap directly influences the running stability, the bearing life and the reliability of the whole diesel engine. The accuracy of the installation and the tightening quality of the main bearing caps are critical to ensure proper operation of the crankshaft within the bearing grooves. After the crankshaft and the main bearing cap are assembled, the rotation smoothness of the crankshaft is detected to judge whether the assembly abnormal conditions such as clamping stagnation, overlarge friction force and the like exist, which is an important link for guaranteeing the delivery quality of the diesel engine. In the prior art, the detection link is mostly finished by manually twisting the crankshaft; the manual torque, operation force and hand feeling of different operators are obviously different, so that the subjectivity of a detection result is high, the consistency of the detection standard and the accuracy of the detection result are difficult to ensure, the conditions of missed detection and false detection are easy to occur, in addition, each diesel engine is required to be operated one by one in manual detection, the detection process is complicated, the time consumption is long, the overall production takt is extremely slow, the requirement of large-scale batch production is difficult to adapt, secondly, whether a crankshaft is blocked or not can be judged only by the experience of the operators in manual detection, quantized rotation torque data cannot be obtained, accurate assessment on the degree of blocked rotation of the crankshaft is difficult to be performed, further data support cannot be provided for the optimization of an assembly process, and the follow-up quality problem is inconvenient to trace. Disclosure of Invention The invention provides a device for assembling a diesel engine and a main bearing cap, which solves the technical problems of low efficiency, lack of detection, high labor intensity, insufficient adaptability and the like in the process of assembling the main bearing cap of the diesel engine in the related technology. The invention provides a diesel engine and main bearing cap assembly device, comprising: The assembly device comprises an assembly device body, wherein the assembly device body comprises a base station, a connecting column is fixedly arranged on the base station, a movable frame and a fixed cylinder are arranged on the connecting column in a sliding manner, an output shaft of the cylinder is fixedly connected with the movable frame, a plurality of groups of assembly part screwing devices are arranged on the movable frame, a bearing table is arranged below the plurality of groups of assembly part screwing devices, a first hydraulic cylinder is fixedly arranged on the connecting column, and a supporting plate is fixedly arranged at a telescopic end of the first hydraulic cylinder; The diesel engine body comprises a diesel engine cylinder body, a crankshaft, a key groove and a main bearing cap, wherein the crankshaft is assembled in a bearing groove of the diesel engine cylinder body, the key groove is formed in a driving end of the crankshaft, the main bearing cap is correspondingly assembled at a joint of the crankshaft and the bearing groove, and a connecting bolt is screwed and fixed through a fitting screwing device to realize limiting assembly of the crankshaft; The clamping assembly unit comprises a workbench fixedly arranged on the supporting plate, a supporting seat is fixedly arranged on one side of the workbench, and a shaft rotation test unit is arranged on the supporting seat; the shaft rotation test unit is used for carrying out rotation test on the assembled crankshaft and detecting whether the rotation of the crankshaft is blocked, the shaft rotation test unit comprises a third hydraulic cylinder fixedly installed on a supporting seat, a sliding frame is fixedly installed at the telescopic end of the third hydraulic cylinder, a second motor is fixedly installed on the sliding frame, a locking mechanism is arranged at the output shaft of the second motor and used for locking and fixing the end part of the crankshaft, so that the second motor can drive the crankshaft to rotate, and rotation blocking detection is completed. As a further optimization scheme of the invention, the two sides of the workbench are fixedly provided with the first connecting seats, the first connecting seats are respectively and rotatably connected with the second connecting seats through the rotating shafts, the