CN111288951B

CN111288951B - Crankshaft detection device

Info

Publication number: CN111288951B
Application number: CN201910686444.8A
Authority: CN
Inventors: 秦利明; 钱桢涛; 宋存贵; 方淳; 李军
Original assignee: Taizhou University
Current assignee: Taizhou University
Priority date: 2019-07-29
Filing date: 2019-07-29
Publication date: 2024-06-14
Anticipated expiration: 2039-07-29
Also published as: CN111288951A

Abstract

The invention provides a crankshaft detection device, which improves the precision of crankshaft detection and the diversity of crankshaft detection items. The crankshaft detection device comprises a workbench and is characterized by comprising a crankshaft clamping mechanism, a crankshaft rotating mechanism and a crankshaft detection mechanism, wherein the crankshaft clamping mechanism comprises a V-shaped block I and a V-shaped block II, the V-shaped block I can move back and forth towards the V-shaped block II through a longitudinal moving mechanism, the V-shaped block II is arranged on the workbench through a vertical moving mechanism, and the V-shaped block II can move up and down along the direction vertical to the top surface of the workbench through the vertical moving mechanism. The crankshaft is arranged on the crankshaft clamping mechanism, different axial sections of the crankshaft are detected through the crankshaft detecting mechanism, and the crankshaft is rotated through the crankshaft rotating mechanism, so that different positions of the axial sections of the crankshaft are detected. The invention has the advantages of accurate measurement and multiple measurement items.

Description

Crankshaft detection device

Technical Field

The invention belongs to the technical field of machinery, and relates to a crankshaft detection device.

Background

The crankshaft is an important component in the engine, and it takes the force from the connecting rod and converts it into torque that is output through the crankshaft and drives other accessories on the engine. The crankshaft is required to have enough strength and rigidity and good balance in the rotation process, so that the crankshaft has higher requirements on manufacturing precision. The structure of the crankshaft comprises a shaft head end, a flange end, a connecting rod neck, a main journal and other shaft section parts, wherein each shaft section part has higher precision requirements on straightness, coaxiality, parallelism, eccentricity and the like, and the crankshaft needs to be detected and judged whether the crankshaft meets the qualification requirements or not. The common detection means is that a crankshaft is placed between two V-shaped blocks, then a dial indicator is used for detecting straightness and the like of a crankshaft shaft section by adopting a meter marking method, and the meter marking method is simple in a detection tool, is a common detection means, but has the defects of low measurement precision, single measurement item and the like.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides a crankshaft detection device which improves the precision of crankshaft detection and the diversity of crankshaft detection projects.

The aim of the invention can be achieved by the following technical scheme: the crankshaft detection device comprises a workbench and is characterized by comprising a crankshaft clamping mechanism, a crankshaft rotating mechanism and a crankshaft detection mechanism, wherein the crankshaft clamping mechanism comprises a V-shaped block I and a V-shaped block II, the V-shaped block I is supported on the workbench through a longitudinal moving mechanism and can move back and forth towards the V-shaped block II through the longitudinal moving mechanism, the V-shaped block I is arranged on the workbench through the vertical moving mechanism and can move up and down along the direction perpendicular to the top surface of the workbench through the vertical moving mechanism, the vertical moving mechanism comprises a guide rail I and a guide rail II which are vertically fixed on the top surface of the workbench, a lifting cross rod is connected between the guide rail I and the guide rail II, the lifting cross rod is connected with a driving mechanism I which can enable the V-shaped block I to move up and down along the guide rail I and the guide rail II, and the V-shaped block II is fixed on the top of the lifting cross rod; the crankshaft rotating mechanism comprises a sliding rail, one end of the sliding rail is vertically fixed with a first guide post and a second guide post, a lifting plate is arranged between the first guide post and the second guide post, the top surface of the lifting plate is fixed with a rotating motor, an output shaft of the rotating motor is fixed with an electromagnet, the lifting plate is connected with a second driving mechanism which can enable the lifting plate to lift up and down along the first guide post and the second guide post, the bottom of the lifting cross rod is fixed with a pulley block, the sliding rail is arranged in the pulley block in a penetrating way, and the sliding rail can slide in the pulley block to enable the electromagnet to be close to or far away from the second V-shaped block; the crankshaft detection mechanism comprises a guide post III and a guide post IV, the guide post III and the guide post IV are horizontally fixed above the workbench through a support, a first sliding plate is connected between the guide post III and the guide post IV, the first sliding plate is connected with a driving mechanism III which enables the first sliding plate to slide along the guide post III and the guide post IV, a measuring head group is arranged on the first sliding plate and comprises a measuring plate which is vertically arranged, a base strip is fixed at the top of the measuring plate, a guide post I and a guide post II are vertically fixed at the top of the base strip, a guide sleeve I and a guide sleeve II are fixed on the first sliding plate, the top of the guide post I penetrates out of the guide sleeve I, the top of the guide post II penetrates out of the guide sleeve II, a compression spring I is arranged on the guide post I, the bottom of the compression spring I is in conflict with the top of the base strip, the top of the compression spring I is in conflict with the bottom of the guide sleeve I, the bottom of the compression spring II is in conflict with the top of the base strip, the top of the compression spring II is in conflict with the bottom of the guide sleeve II, the top of the guide post II is in the conflict with the top of the guide sleeve II, the top of the guide post I and the top of the guide post II is in the guide post I and the guide post II.

The longitudinal moving mechanism comprises a guide post five and a guide post six which are horizontally arranged on the workbench, wherein two ends of the guide post five are fixed with the top surface of the workbench through supporting seats, two ends of the guide post six are fixed with the top surface of the workbench through supporting seats, the guide post five is sleeved with a guide sleeve five, the guide post six is sleeved with a guide sleeve six, a sliding plate II is fixedly connected between the guide sleeve five and the guide sleeve six, a supporting frame is fixedly arranged on the sliding plate II, and the V-shaped block I is fixedly connected with the top of the supporting frame.

The V-shaped block I is detachably connected with the support frame through the bracket I.

The driving mechanism I comprises a guide wheel group I and a guide wheel group II, the guide wheel group I is clamped on the guide rail I and can slide up and down along the guide rail I, the guide wheel group II is clamped on the guide rail II and can slide up and down along the guide rail II, one end of the lifting cross rod is fixed with the guide wheel group I, the other end of the lifting cross rod is fixed with the guide wheel group II, the guide wheel group I is fixedly provided with a screw sleeve I, the guide wheel group II is fixedly provided with a screw sleeve II, a first driving motor and a second driving motor are fixed on the workbench, an output shaft of the first driving motor is fixedly connected with a screw rod I, the top end of the screw rod I is screwed into and extends out of the screw sleeve I and is connected with a hinge seat fixed at the top of the guide rail I, and the top end of the screw rod II is screwed into and extends out of the screw sleeve II and is connected with a hinge seat fixed at the top of the guide rail II.

The guide wheel group I comprises a clamping plate I and a clamping plate II, a guide wheel I and a guide wheel II are arranged between the clamping plate I and the clamping plate II, a guide groove I is formed in one side of the guide rail I, a guide groove II is formed in the other side of the guide rail I, the guide wheel I is abutted against the guide groove I and can slide up and down along the guide groove I, and the guide wheel II is abutted against the guide groove II and can slide up and down along the guide groove II; the guide wheel group II comprises a clamping plate III and a clamping plate IV, a guide wheel III and a guide wheel IV are arranged between the clamping plate III and the clamping plate IV, a guide groove III is formed in one side of the guide rail II, a guide groove IV is formed in the other side of the guide rail II, the guide wheel III is abutted against the guide groove III and can slide up and down along the guide groove III, and the guide wheel IV is abutted against the guide groove IV and can slide up and down along the guide groove IV; the first threaded sleeve is fixed with the first clamping plate through a bent pin, the second threaded sleeve is fixed with the third clamping plate through a bent pin, one end of the lifting cross rod is fixed with the second clamping plate, and the other end of the lifting cross rod is fixed with the fourth clamping plate.

The second driving mechanism comprises a second driving motor, a body of the second driving motor is fixed with the end part of the sliding rail, a screw rod III is fixedly connected to an output shaft of the second driving motor, a screw sleeve III is fixedly arranged on the lifting plate, the top end of the screw rod III is screwed in and extends out of the screw sleeve III, a guide sleeve I is fixedly arranged on one side of the lifting plate, a guide sleeve II is fixedly arranged on the other side of the lifting plate, the guide sleeve I is sleeved with the guide post I, and the guide sleeve II is sleeved with the guide post II.

The pulley block comprises a clamping plate five and a clamping plate six, a guide wheel five and a guide wheel six are arranged between the clamping plate five and the clamping plate six, a guide groove five is formed in the top of the sliding rail, a guide groove six is formed in the bottom of the sliding rail, the guide wheel five is abutted against the guide groove five and can slide along the guide groove five, the guide wheel six is abutted against the guide groove six and can slide along the guide groove six, and the tops of the clamping plate five and the clamping plate six are fixed with the bottom of the lifting cross rod.

The driving mechanism III comprises a driving motor III, a machine body of the driving motor III is fixed with the support, a screw rod IV is fixedly connected to an output shaft of the driving motor III, a guide sleeve III is fixed to the bottom of one side of the first sliding plate, a guide sleeve IV is fixed to the bottom of the other side of the first sliding plate, the guide sleeve III is sleeved into the guide post III, the guide sleeve IV is sleeved into the guide post IV, a screw sleeve IV is fixed to the first sliding plate, and the screw rod IV is screwed into and penetrates through the screw sleeve IV.

The lifting rod is fixed at the top of the first sliding plate, the linear displacement sensor is fixed with the lifting rod, the lifting hole is formed in the base plate, and the lifting rod is arranged in the lifting hole in a penetrating mode.

The V-shaped block II is detachably connected with the top of the lifting cross rod through a bracket II.

Compared with the prior art, the invention has the following advantages:

1. the invention records the data of the measurement result through the displacement sensor and has the advantage of accurate measurement.

2. The invention can measure the straightness, coaxiality, parallelism, eccentricity and the like of each shaft section of the crankshaft and has the advantage of more measurement items.

Drawings

FIG. 1 is a schematic diagram of a forward axiom structure of the present invention.

FIG. 2 is a schematic view of a rearward axiom structure of the present invention.

FIG. 3 is a schematic diagram of a crankshaft rotation mechanism in accordance with the present invention.

In the figure, 1, a workbench; 2. v-shaped block I; 3. v-shaped block II; 4. a first guide rail; 4a, a first guide groove; 4b, a second guide groove; 5. a second guide rail; 5a, a guide groove III; 5b, a guide groove IV; 6. lifting the cross bar; 7. a slide rail; 7a, a guide groove V; 7b, a guide groove six; 8. a first guide post; 9. a second guide post; 10. a lifting plate; 11. a rotating motor; 12. an electromagnet; 13. pulley block; 13a, clamping plate five; 13b, clamping plates six; 13c, a guide wheel five; 13d, a guide wheel six; 14. a guide post III; 15. guide posts IV; 16. a bracket; 17. a first sliding plate; 18. a measuring plate; 19. a base strip; 20. a first guide post; 21. a second guide post; 22. a guide sleeve I; 23. a second guide sleeve; 24. compressing a first spring; 25. compression spring II; 26. a substrate; 26a, lifting holes; 27. a linear displacement sensor; 28. guide post V; 29. guide posts six; 30. guide sleeve five; 31. guide sleeve six; 32. a second slide plate; 33. a support frame; 34. a bracket I; 35. a guide wheel group I; 35a, clamping plate one; 35b, a second clamping plate; 35c, a first guide wheel; 35d, a second guide wheel; 36. a guide wheel group II; 36a, a third clamping plate; 36b, clamping plate IV; 36c, a guide wheel III; 36d, a guide wheel IV; 37. a first screw sleeve; 38. a second screw sleeve; 39. a first driving motor; 40. a second driving motor; 41. a first screw rod; 42. a second screw rod; 43. a second driving motor; 44. a screw rod III; 45. a third screw sleeve; 46. the guide sleeve I; 47. guide sleeve II; 48. a third driving motor; 49. a screw rod IV; 50. guide sleeve III; 51. guide sleeve IV; 52. a screw sleeve IV; 53. a lifting rod; 54. and a bracket II.

Detailed Description

The following are specific embodiments of the present invention and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1, 2 and 3, the crankshaft detection device comprises a workbench 1, and is characterized in that the crankshaft detection device comprises a crankshaft clamping mechanism, a crankshaft rotating mechanism and a crankshaft detection mechanism, the crankshaft clamping mechanism comprises a V-shaped block I2 and a V-shaped block II 3, the V-shaped block I2 is supported on the workbench 1 through a longitudinal moving mechanism, the V-shaped block I2 can move back and forth towards the V-shaped block II 3 through the longitudinal moving mechanism, the V-shaped block II 3 is arranged on the workbench 1 through a vertical moving mechanism, the V-shaped block II 3 can move up and down along the direction perpendicular to the top surface of the workbench 1 through the vertical moving mechanism, the vertical moving mechanism comprises a first guide rail 4 and a second guide rail 5 which are vertically fixed on the top surface of the workbench 1, a lifting cross bar 6 is connected between the first guide rail 4 and the second guide rail 5, the lifting cross bar 6 is connected with a driving mechanism which can enable the V-shaped block II 3 to move up and down along the first guide rail 4 and the second guide rail 5, and the V-shaped block II 3 is fixed on the top of the lifting cross bar 6; the crankshaft rotating mechanism comprises a sliding rail 7, one end of the sliding rail 7 is vertically fixed with a first guide post 8 and a second guide post 9, a lifting plate 10 is arranged between the first guide post 8 and the second guide post 9, the top surface of the lifting plate 10 is fixed with a rotating motor 11, an output shaft of the rotating motor 11 is fixed with an electromagnet 12, the lifting plate 10 is connected with a second driving mechanism which can enable the lifting plate to lift up and down along the first guide post 8 and the second guide post 9, a pulley block 13 is fixed at the bottom of the lifting cross rod 6, the sliding rail 7 is arranged in the pulley block 13 in a penetrating manner, and the sliding rail 7 can slide in the pulley block 13 to enable the electromagnet 12 to be close to or far away from the V-shaped block 3; the crankshaft detection mechanism comprises a guide post III 14 and a guide post IV 15, the guide post III 14 and the guide post IV 15 are horizontally fixed above the workbench 1 through a support 16, a first sliding plate 17 is connected between the guide post III 14 and the guide post IV 15, the first sliding plate 17 is connected with a driving mechanism III capable of enabling the driving mechanism to slide along the guide post III 14 and the guide post IV 15, a measuring head group is arranged on the first sliding plate 17, the measuring head group comprises a measuring plate 18 which is vertically arranged, a base bar 19 is fixed at the top end of the measuring plate 18, a first guide post 20 and a second guide post 21 are vertically fixed at the top end of the base bar 19, a first guide sleeve 22 and a second guide sleeve 23 are fixed on the first sliding plate 17, the top end of the first guide post 20 penetrates out of the first guide sleeve 22, the top end of the second guide post 21 penetrates out of the second guide sleeve 23, the first guide post 20 is sleeved with a compression spring 24, the bottom end of the compression spring 24 is in conflict with the top end of the base bar 19, the top end of the compression spring 24 is in conflict with the bottom end of the guide sleeve 22, the second guide post 21 is sleeved with a compression spring 25, the bottom end of the compression spring 25 is in conflict with the top end of the base bar 19, the top end of the compression spring 25 is in conflict with the top end of the guide sleeve 25 is in conflict with the bottom end of the guide sleeve 23, and the top end of the guide post 20 is in line of the guide sleeve 26 and is fixedly connected with the bottom of a guide post 20.

The working principle is as follows: one end of a crankshaft to be detected is placed on a V-shaped block I2, the other end of the crankshaft to be detected is placed on a V-shaped block II 3, the V-shaped block I2 can move back and forth towards the V-shaped block II 3 through a longitudinal moving mechanism, the crankshaft is adapted to different lengths of the crankshaft, the V-shaped block II 3 moves up and down through a driving mechanism I to enable a lifting cross rod 6 to move up and down, the V-shaped block II 3 is equal to the V-shaped block I2 in height, the crankshaft is in a horizontal placing state, in the embodiment, the equal height adjustment of the V-shaped block II 3 and the V-shaped block I2 can be realized by means of a level instrument, one end of the level instrument is placed on the V-shaped block I2, and the other end of the level instrument is placed on the V-shaped block II 3, when the bubble of the middle level of the level is in the zero line scale, the level is in a horizontal state, namely the V-shaped block II 3 is equal to the V-shaped block I2 in height, in the embodiment, the driving mechanism I is connected with a controller fixed on the workbench 1 through a circuit, the controller is a product in the prior art, and the driving mechanism I is controlled by the controller to enable the lifting cross rod 6 to move up and down; the crankshaft rotating mechanism is adjusted, the sliding rail 7 slides in the pulley block 13, the height of the lifting plate 10 is adjusted through the driving mechanism II, the electromagnet 12 is contacted with the end part of the crankshaft positioned on the V-shaped block II 3, the electromagnet 12 is electrified and adsorbed and fixed with the end part of the crankshaft, the rotating motor 11 on the lifting plate 10 is a stepping motor, the stepping motor drives the electromagnet 12 to rotate, the crankshaft is rotated at different positions, the crankshaft detecting mechanism is convenient to detect the positions of different shaft sections of the crankshaft, in the embodiment, the driving mechanism II, the rotating motor 11 and the electromagnet 12 are connected with the controller through circuits, in order to align the rotation center of the electromagnet 12 with the rotation center of the crankshaft, in this embodiment, the magnetic suction head of the electromagnet 12 is cylindrical, the electromagnet 12 is a product in the prior art, a salient point is arranged on the end surface of the magnetic suction head, and a central hole is arranged on the end surface of the shaft end of the crankshaft when the crankshaft is processed, and the salient point of the end surface of the magnetic suction head is aligned with the central hole and inserted, so that the rotation center of the electromagnet 12 is aligned with the rotation center of the crankshaft; the driving mechanism III and the linear displacement sensor 27 in the crankshaft detection mechanism are connected with the controller through circuits, the controller controls the driving mechanism III to move the measuring head group to the upper part of the crankshaft to be detected, the measuring plate 18 in the measuring head group is abutted against the crankshaft to be detected, when the eccentricity of the crankshaft is measured, the controller controls the rotating motor 11 to rotate, the measuring plate 18 generates vertical deflection, the measuring plate 18 is always abutted against the crankshaft under the action of the compression spring I24 and the compression spring II 25, the vertical deflection is transmitted to the base plate 26 through the guide post I20 and the guide post II 21, the vertical deflection value is obtained by the linear displacement sensor 27 and is transmitted to the controller, reading by a controller, wherein one half of the vertical offset value is the eccentric distance of the crankshaft detection shaft section; when the straightness, coaxiality and parallelism of the crankshaft shaft section are detected, the controller controls the rotating motor 11 to stop rotating, the measuring plate 18 is abutted against the detecting shaft section, the controller drives the mechanism III, the measuring plate 18 moves along the length direction of the detecting shaft section, the linear displacement sensor 27 obtains a height deviation value, the straightness of the shaft section is obtained through the height deviation value through a formula, the straightness of different positions of the shaft section can be detected through rotating the crankshaft by the rotating motor 11, and the straightness, coaxiality and parallelism are detected through the height deviation value generated when the measuring plate 18 axially displaces.

The longitudinal moving mechanism comprises a guide post five 28 and a guide post six 29 which are horizontally arranged on the workbench 1, two ends of the guide post five 28 are fixed with the top surface of the workbench 1 through supporting seats, two ends of the guide post six 29 are fixed with the top surface of the workbench 1 through supporting seats, the guide post five 28 is sleeved with a guide sleeve five 30, the guide post six 29 is sleeved with a guide sleeve six 31, a sliding plate two 32 is fixedly connected between the guide sleeve five 30 and the guide sleeve six 31, a supporting frame 33 is fixed on the sliding plate two 32, and the V-shaped block one 2 is fixedly connected with the top of the supporting frame 33. The second sliding plate 32 is manually pushed to longitudinally slide along the guide post five 28 and the guide post six 29 through the guide sleeve five 30 and the guide sleeve six 31.

The first V-shaped block 2 is detachably connected with the support frame 33 through the first bracket 34, so that the first V-shaped block 2 with different specifications can be replaced conveniently, and in the embodiment, the first V-shaped block 2 is detachably connected with the first bracket 34 and the first bracket 34 is connected with the support frame 33 by adopting a bolt and nut connection mode.

The first driving mechanism comprises a first guide wheel set 35 and a second guide wheel set 36, the first guide wheel set 35 is clamped on the first guide rail 4 and can slide up and down along the first guide rail 4, the second guide wheel set 36 is clamped on the second guide rail 5 and can slide up and down along the second guide rail 5, one end of the lifting cross rod 6 is fixed with the first guide wheel set 35, the other end of the lifting cross rod is fixed with the second guide wheel set 36, the first guide wheel set 35 is fixedly provided with a first screw sleeve 37, the second guide wheel set 36 is fixedly provided with a second screw sleeve 38, the workbench 1 is fixedly provided with a first driving motor 39 and a second driving motor 40, an output shaft of the first driving motor 39 is fixedly connected with a first screw rod 41, an output shaft of the second driving motor 40 is fixedly connected with a second screw rod 42, and the top end of the first screw rod 41 is screwed into and extends out of the first screw sleeve 37 and is connected with a hinge seat fixed at the top of the first guide rail 4, and the top of the second screw rod 42 is screwed into and extends out of the second screw sleeve 38 and is connected with a hinge seat fixed at the top of the second guide rail 5. The first driving motor 39 and the second driving motor 40 are connected with the controller through circuits, and the first driving motor 39 and the second driving motor 40 drive the first screw 41 and the second screw 42 to rotate, so that the lifting cross rod 6 can slide up and down.

The guide wheel group I35 comprises a clamping plate I35 a and a clamping plate II 35b, a guide wheel I35 c and a guide wheel II 35d are arranged between the clamping plate I35 a and the clamping plate II 35b, a guide groove I4 a is formed in one side of the guide rail I4, a guide groove II 4b is formed in the other side of the guide rail I4, the guide wheel I35 c is abutted against the guide groove I4 a and can slide up and down along the guide groove I4 a, and the guide wheel II 35d is abutted against the guide groove II 4b and can slide up and down along the guide groove II 4 b; the guide wheel group II 36 comprises a clamping plate III 36a and a clamping plate IV 36b, a guide wheel III 36c and a guide wheel IV 36d are arranged between the clamping plate III 36a and the clamping plate IV 36b, a guide groove III 5a is formed in one side of the guide rail II 5, a guide groove IV 5b is formed in the other side of the guide rail II, the guide wheel III 36c is abutted against the guide groove III 5a and can slide up and down along the guide groove III 5a, and the guide wheel IV 36d is abutted against the guide groove IV 5b and can slide up and down along the guide groove IV 5 b; the first screw sleeve 37 is fixed with the first clamping plate 35a through a bent pin, the second screw sleeve 38 is fixed with the third clamping plate 36a through a bent pin, one end of the lifting cross rod 6 is fixed with the second clamping plate 35b, and the other end is fixed with the fourth clamping plate 36 b.

The second driving mechanism comprises a second driving motor 43, a machine body of the second driving motor 43 is fixed with the end part of the sliding rail 7, an output shaft of the second driving motor 43 is fixedly connected with a screw rod III 44, a threaded sleeve III 45 is fixed on the lifting plate 10, the top end of the screw rod III 44 is screwed into and extends out of the threaded sleeve III 45, a first guide sleeve 46 is fixed on one side of the lifting plate 10, a second guide sleeve 47 is fixed on the other side of the lifting plate 10, the first guide sleeve 46 is sleeved on the first guide post 8, and the second guide sleeve 47 is sleeved on the second guide post 9. The second driving motor 43 is connected with the controller through a circuit, and the lifting plate 10 is lifted up and down through the rotation of the screw rod.

The pulley block 13 comprises a clamping plate five 13a and a clamping plate six 13b, a guide wheel five 13c and a guide wheel six 13d are arranged between the clamping plate five 13a and the clamping plate six 13b, a guide groove five 7a is formed in the top of the sliding rail 7, a guide groove six 7b is formed in the bottom of the sliding rail 7, the guide wheel five 13c is abutted against the guide groove five 7a and can slide along the guide groove five 7a, and the guide wheel six 13d is abutted against the guide groove six 7b and can slide along the guide groove six 7b, and the tops of the clamping plate five 13a and the clamping plate six 13b are fixed with the bottom of the lifting cross rod 6.

The third driving mechanism comprises a third driving motor 48, a machine body of the third driving motor 48 is fixed with the bracket 16, an output shaft of the third driving motor 48 is fixedly connected with a fourth screw rod 49, a third guide sleeve 50 is fixed at the bottom of one side of the first sliding plate 17, a fourth guide sleeve 51 is fixed at the bottom of the other side of the first sliding plate, the third guide sleeve 50 is sleeved in the third guide post 14, the fourth guide sleeve 51 is sleeved in the fourth guide post 15, a fourth screw sleeve 52 is fixed on the first sliding plate 17, and the fourth screw rod 49 is screwed in and penetrates through the fourth screw sleeve 52. The third driving motor 48 is connected with the controller through a circuit, and the third driving motor 48 enables the fourth screw rod 49 to rotate, so that the first sliding plate 17 slides along the third guide pillar 14 and the fourth guide pillar 15.

The lifting rod 53 is fixed on the top of the first slide plate 17, the linear displacement sensor 27 is fixed with the lifting rod 53, the base plate 26 is provided with a lifting hole 26a, and the lifting rod 53 is arranged in the lifting hole 26a in a penetrating mode. The linear displacement sensor 27 is a prior art product, such as a contact displacement sensor disclosed in chinese patent (application number: CN 201720248771.1). The linear displacement sensor 27 in this embodiment includes a body 27a and a measuring rod 27b, and the expansion and contraction of the measuring rod generates a displacement signal, and the displacement value is displayed through a display screen of the body. In this embodiment, the body of the linear displacement sensor 27 is fixed to the lifting rod 53, and the end of the measuring rod is fixed to the top of the base plate 26.

The second V-shaped block 3 is detachably connected with the top of the lifting cross rod 6 through the second bracket 54, so that the second V-shaped block 3 with different specifications can be replaced conveniently, and in the embodiment, the second V-shaped block 3 is detachably connected with the second bracket 54 and the second bracket 54 is connected with the lifting cross rod 6 by adopting a bolt and nut connection mode.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although 1, a workbench is used more herein; 2. v-shaped block I; 3. v-shaped block II; 4. a first guide rail; 4a, a first guide groove; 4b, a second guide groove; 5. a second guide rail; 5a, a guide groove III; 5b, a guide groove IV; 6. lifting the cross bar; 7. a slide rail; 7a, a guide groove V; 7b, a guide groove six; 8. a first guide post; 9. a second guide post; 10. a lifting plate; 11. a rotating motor; 12. an electromagnet; 13. pulley block; 13a, clamping plate five; 13b, clamping plates six; 13c, a guide wheel five; 13d, a guide wheel six; 14. a guide post III; 15. guide posts IV; 16. a bracket; 17. a first sliding plate; 18. a measuring plate; 19. a base strip; 20. a first guide post; 21. a second guide post; 22. a guide sleeve I; 23. a second guide sleeve; 24. compressing a first spring; 25. compression spring II; 26. a substrate; 26a, lifting holes; 27. a linear displacement sensor; 28. guide post V; 29. guide posts six; 30. guide sleeve five; 31. guide sleeve six; 32. a second slide plate; 33. a support frame; 34. a bracket I; 35. a guide wheel group I; 35a, clamping plate one; 35b, a second clamping plate; 35c, a first guide wheel; 35d, a second guide wheel; 36. a guide wheel group II; 36a, a third clamping plate; 36b, clamping plate IV; 36c, a guide wheel III; 36d, a guide wheel IV; 37. a first screw sleeve; 38. a second screw sleeve; 39. a first driving motor; 40. a second driving motor; 41. a first screw rod; 42. a second screw rod; 43. a second driving motor; 44. a screw rod III; 45. a third screw sleeve; 46. the guide sleeve I; 47. guide sleeve II; 48. a third driving motor; 49. a screw rod IV; 50. guide sleeve III; 51. guide sleeve IV; 52. a screw sleeve IV; 53. a lifting rod; 54. brackets, etc., but do not exclude the possibility of using other terms. These terms are used merely for convenience in describing and explaining the nature of the invention; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present invention.

Claims

1. The crankshaft detection device comprises a workbench (1), and is characterized by comprising a crankshaft clamping mechanism, a crankshaft rotating mechanism and a crankshaft detection mechanism, wherein the crankshaft clamping mechanism comprises a V-shaped block I (2) and a V-shaped block II (3), the V-shaped block I (2) is supported on the workbench (1) through a longitudinal moving mechanism, the V-shaped block I (2) can move back and forth towards the V-shaped block II (3) through the longitudinal moving mechanism, the V-shaped block II (3) is arranged on the workbench (1) through a vertical moving mechanism, the V-shaped block II (3) can move up and down along the direction vertical to the top surface of the workbench (1) through the vertical moving mechanism, the vertical moving mechanism comprises a first guide rail (4) and a second guide rail (5) which are vertically fixed on the top surface of the workbench (1), a lifting cross rod (6) is connected between the first guide rail (4) and the second guide rail (5), the lifting cross rod (6) is connected with a first driving mechanism which can enable the lifting cross rod to move up and down along the first guide rail (4) and the second guide rail (5), and the second V-shaped block (3) is fixed on the top of the lifting cross rod (6); the crankshaft rotating mechanism comprises a slide rail (7), one end of the slide rail (7) is vertically fixed with a first guide post (8) and a second guide post (9), a lifting plate (10) is arranged between the first guide post (8) and the second guide post (9), the top surface of the lifting plate (10) is fixed with a rotating motor (11), an output shaft of the rotating motor (11) is fixed with an electromagnet (12), the lifting plate (10) is connected with a second driving mechanism which can enable the lifting plate to lift up and down along the first guide post (8) and the second guide post (9), a pulley block (13) is fixed at the bottom of the lifting cross bar (6), the slide rail (7) is arranged in the pulley block (13) in a penetrating way, the slide rail (7) can slide in the pulley block (13), the electromagnet (12) is close to or far from the V-shaped block II (3); the crankshaft detection mechanism comprises a guide post III (14) and a guide post IV (15), the guide post III (14) and the guide post IV (15) are horizontally fixed above the workbench (1) through a bracket (16), a first sliding plate (17) is connected between the guide post III (14) and the guide post IV (15), the first sliding plate (17) is connected with a driving mechanism III which can enable the first sliding plate to slide along the guide post III (14) and the guide post IV (15), a measuring head group is arranged on the first sliding plate (17), the measuring head group comprises a vertically arranged measuring plate (18), a base strip (19) is fixed at the top end of the measuring plate (18), a first guide post (20) and a second guide post (21) are vertically fixed at the top of the base strip (19), the first sliding plate (17) is fixedly provided with a first guide sleeve (22) and a second guide sleeve (23), the top end of the first guide column (20) penetrates out of the first guide sleeve (22), the top end of the second guide column (21) penetrates out of the second guide sleeve (23), the first guide column (20) is sleeved with a first compression spring (24), the bottom end of the first compression spring (24) is abutted against the top of the base strip (19), the top end of the first compression spring (24) is abutted against the bottom end of the first guide sleeve (22), the second guide column (21) is sleeved with a second compression spring (25), the bottom end of the second compression spring (25) is abutted against the top end of the base strip (19), the top ends of the first guide column (20) and the second guide column (21) are fixed with the bottom of a substrate (26), and the substrate (26) is connected with a linear displacement sensor (27);

the vertical moving mechanism comprises a guide post five (28) and a guide post six (29) which are horizontally arranged on the workbench (1), wherein two ends of the guide post five (28) are fixed with the top surface of the workbench (1) through supporting seats, two ends of the guide post six (29) are fixed with the top surface of the workbench (1) through supporting seats, the guide post five (28) is sleeved with a guide sleeve five (30), the guide post six (29) is sleeved with a guide sleeve six (31), a sliding plate two (32) is fixedly connected between the guide sleeve five (30) and the guide sleeve six (31), a supporting frame (33) is fixedly arranged on the sliding plate two (32), and the V-shaped block one (2) is fixedly connected with the top of the supporting frame (33);

The second driving mechanism comprises a second driving motor (43), a machine body of the second driving motor (43) is fixed with the end part of the sliding rail (7), a screw rod III (44) is fixedly connected with an output shaft of the second driving motor (43), a screw sleeve III (45) is fixed on the lifting plate (10), the top end of the screw rod III (44) is screwed into and extends out of the screw sleeve III (45), a guide sleeve I (46) is fixed on one side of the lifting plate (10), a guide sleeve II (47) is fixed on the other side of the lifting plate, the guide sleeve I (46) is sleeved into the guide post I (8), and the guide sleeve II (47) is sleeved into the guide post II (9);

The lifting rod (53) is fixed to the top of the first sliding plate (17), the linear displacement sensor (27) is fixed to the lifting rod (53), the lifting hole (26 a) is formed in the base plate (26), and the lifting rod (53) is arranged in the lifting hole (26 a) in a penetrating mode.

2. A crankshaft detection apparatus according to claim 1, wherein the V-block (2) is detachably connected to the support frame (33) via a bracket (34).

3. The crankshaft detection device according to claim 1, wherein the first driving mechanism comprises a first guide wheel set (35) and a second guide wheel set (36), the first guide wheel set (35) is clamped on the first guide rail (4) and can slide up and down along the first guide rail (4), the second guide wheel set (36) is clamped on the second guide rail (5) and can slide up and down along the second guide rail (5), one end of the lifting cross bar (6) is fixed with the first guide wheel set (35), the other end of the lifting cross bar is fixed with the second guide wheel set (36), the first guide wheel set (35) is fixed with a first screw sleeve (37), the second guide wheel set (36) is fixed with a second screw sleeve (38), an output shaft of the first driving motor (39) is fixedly connected with a first screw rod (41), an output shaft of the second driving motor (40) is fixedly connected with a second screw rod (42), and the top end of the first screw rod (41) is screwed into the first screw sleeve (37) and is fixedly connected with the top of the second guide rail (4) and is fixedly hinged with the top of the second screw seat (42).

4. A crankshaft detection device according to claim 3, wherein the first guide wheel set (35) comprises a first clamping plate (35 a) and a second clamping plate (35 b), a first guide wheel (35 c) and a second guide wheel (35 d) are arranged between the first clamping plate (35 a) and the second clamping plate (35 b), a first guide groove (4 a) is formed in one side of the first guide rail (4), a second guide groove (4 b) is formed in the other side of the first guide rail, the first guide wheel (35 c) is abutted against the first guide groove (4 a) and can slide up and down along the first guide groove (4 a), and the second guide wheel (35 d) is abutted against the second guide groove (4 b) and can slide up and down along the second guide groove (4 b); the guide wheel group II (36) comprises a clamp plate III (36 a) and a clamp plate IV (36 b), a guide wheel III (36 c) and a guide wheel IV (36 d) are arranged between the clamp plate III (36 a) and the clamp plate IV (36 b), a guide groove III (5 a) is formed in one side of the guide rail II (5), a guide groove IV (5 b) is formed in the other side of the guide rail II, the guide wheel III (36 c) is abutted against the guide groove III (5 a) and can slide up and down along the guide groove III (5 a), and the guide wheel IV (36 d) is abutted against the guide groove IV (5 b) and can slide up and down along the guide groove IV (5 b); the first screw sleeve (37) is fixed with the first clamping plate (35 a) through a bent pin, the second screw sleeve (38) is fixed with the third clamping plate (36 a) through a bent pin, one end of the lifting cross rod (6) is fixed with the second clamping plate (35 b), and the other end of the lifting cross rod is fixed with the fourth clamping plate (36 b).

5. The crankshaft detection device according to claim 1, wherein the pulley block (13) comprises a clamping plate five (13 a) and a clamping plate six (13 b), a guide wheel five (13 c) and a guide wheel six (13 d) are arranged between the clamping plate five (13 a) and the clamping plate six (13 b), a guide groove five (7 a) is formed in the top of the sliding rail (7), a guide groove six (7 b) is formed in the bottom of the sliding rail, the guide wheel five (13 c) is abutted against the guide groove five (7 a) and can slide along the guide groove five (7 a), the guide wheel six (13 d) is abutted against the guide groove six (7 b) and can slide along the guide groove six (7 b), and the tops of the clamping plate five (13 a) and the clamping plate six (13 b) are fixed with the bottom of the lifting cross bar (6).

6. The crankshaft detection device according to claim 1, wherein the third driving mechanism comprises a third driving motor (48), a body of the third driving motor (48) is fixed with the bracket (16), a fourth screw rod (49) is fixedly connected with an output shaft of the third driving motor (48), a third guide sleeve (50) is fixed at the bottom of one side of the first sliding plate (17), a fourth guide sleeve (51) is fixed at the bottom of the other side of the first sliding plate, the third guide sleeve (50) is sleeved into the third guide post (14), the fourth guide sleeve (51) is sleeved into the fourth guide post (15), the first sliding plate (17) is fixed with a fourth screw sleeve (52), and the fourth screw rod (49) is screwed into and penetrates through the fourth screw sleeve (52).

7. A crank detection device according to claim 1, characterized in that the V-block two (3) is detachably connected to the top of the lifting cross bar (6) by means of a bracket two (54).