Wheel camshaft precision detection device

Abstract

The invention provides a wheel camshaft precision detection device, which comprises a base, a detection mechanism, a linkage piece, a lifting mechanism and a clamping mechanism, and is characterized in that the clamping mechanism is used for clamping a camshaft with a cam, the lifting mechanism is arranged on the base and is used for driving the linkage piece to lift, the detection mechanism comprises two groups of symmetrically arranged detection assemblies, and the detection assemblies are arranged on the base. The detection assembly comprises a fixed sleeve, a movable column, a detection head, a telescopic sleeve, a guide column and an indicator lamp, the movable column is axially connected to the fixed sleeve in a telescopic mode and connected with the top end in the fixed sleeve through a first spring, and the detection head is arranged at the end of the movable column. When the detection mechanism carries out specific detection, the cam is used as a middle conductor, and the indicating lamps on the two sides are turned on. And the guide post is in constant contact with the cam in the ascending process. In the ascending process of the detection heads, if the two sides of the cam are asymmetric, the detection head on one side is separated from the cam, and the indicating lamp on the side is extinguished, so that the asymmetric positions of the two sides of the cam are obtained.

Description

Technical Field

[0001] The invention relates to the technical field of camshaft detection, and in particular to a wheel camshaft accuracy detection device. Background Art

[0002] The camshaft is one of the five core components of a car engine. Its function is to control the timing of the valve group opening and closing according to a certain law of motion to ensure the correct valve timing of the engine, so that the fresh mixture enters the cylinder in time and the exhaust gas after combustion is discharged from the cylinder in time. The size, shape and position of the key parts of the camshaft are the main factors affecting the size of the opening and closing clearance of the engine valve and the valve timing efficiency.

[0003] Generally, the camshaft inspection gauge is used by the inspector who holds the camshaft and pushes it toward the inspection gauge part with a micrometer. However, such inspection can only detect the dimensional accuracy at the key points of the camshaft. The accuracy of the symmetry on both sides of the eccentric part of the camshaft has a greater impact on the service life and noise of the camshaft in the later period, and conventional dimensional measurement cannot accurately measure the symmetry accuracy on both sides.

[0004] Based on this, this case came into being. Summary of the invention

[0005] 1. Technical issues to be solved

[0006] In view of the deficiencies in the prior art, the present invention provides a wheel camshaft accuracy detection device, which solves the problems raised in the above-mentioned background technology.

[0007] (II) Technical solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: a wheel camshaft accuracy detection device, comprising a base, a detection mechanism, a linkage, a lifting mechanism and a clamping mechanism, the clamping mechanism is used to clamp a camshaft with a cam, the lifting mechanism is arranged on the base, and is used to drive the linkage to lift and lower, the detection mechanism includes two groups of symmetrically arranged detection components, the detection components include a fixed sleeve, a movable column, a detection head, a telescopic sleeve, a guide column and an indicator light, the movable column is axially telescopically connected to the fixed sleeve, and is connected to the top end in the fixed sleeve through a spring 1, the detection head is arranged at the end of the movable column, and corresponds to the side of the cam, the movable columns of the two groups of detection components are linked in opposite directions through a linkage, the telescopic sleeve is fixed on the fixed sleeve, the guide column is axially telescopically connected in the telescopic sleeve and is connected to the top end in the telescopic sleeve through a spring 2, the other end of the guide column is in corresponding contact with the side of the cam, and the detection head, guide column and indicator light are connected in series on the same circuit.

[0009] Preferably, the linkage part includes a housing, a gear, rack 1 and rack 2, the gear is pivotally connected inside the housing, rack 1 and rack 2 are laterally slidably adapted in the housing, and are respectively engaged with the upper and lower sides of the gear, and rack 1 and rack 2 are respectively connected to the movable columns of the two groups of detection components through connecting rods.

[0010] Preferably, a precision adjustment component is arranged in the movable column, and the precision adjustment component includes a limit sleeve, a limit column, a micro motor, a screw and a nut sleeve with a threaded sleeve arranged outside the screw, the limit sleeve is fixedly arranged in the middle of the movable column, the detection head is axially telescopically connected to the movable column and is connected to the limit sleeve through spring three, the micro motor is fixed at the end part in the movable column, the screw is coaxially connected to the output shaft of the micro motor, the limit column is connected to the nut sleeve, and one end passes through the limit sleeve and corresponds to the bottom end of the detection head.

[0011] Preferably, a slide rail is provided on the base along the clamping direction of the cam shaft, and the lifting mechanism includes a moving platform, a lead screw, a sliding rod, a threaded sleeve and a driving motor. The moving platform is slidably adapted on the slide rail, the lead screw and the sliding rod are vertically arranged on the moving platform, the threaded sleeve is threadedly sleeved on the lead screw and connected to the housing, a sliding sleeve is provided on the housing and is slidably sleeved on the sliding rod, and the driving motor is arranged at the bottom of the moving platform and is coaxially connected to the lead screw.

[0012] Preferably, the clamping mechanism includes two groups of V-shaped seats, a clamping plate, a spring five, a fixed block, and an adjusting screw. The V-shaped seat is fixed on the base, and the top of the V-shaped seat is in a vertical closed shape. The clamping plate is vertically slidably adapted on the vertical section of the V-shaped seat and is connected to the top of the V-shaped seat through spring five. A through groove is vertically opened on the clamping plate, and the fixed block is vertically slidably adapted in the through groove. The bottom end of the adjusting screw is pivotally connected to the fixed block, and the upper section passes through the top of the V-shaped seat and is threadedly connected thereto.

[0013] Preferably, it also includes a centering mechanism, which is slidably adapted on the slide rail and is used to calibrate the cam so that both sides of the cam are symmetrically arranged with respect to the vertical line.

[0014] Preferably, the centering mechanism includes a support seat, two pressure plates, a lifting plate, and a cylinder. The support seat is slidably adapted on a slide rail, the bottom ends of the two pressure plates are hinged on the support seat, the two pressure plates are provided with inclined guide grooves, and sliding shafts are slidably adapted in the guide grooves. The two sliding shafts are connected to the lifting plates, and the cylinder is vertically arranged on the support seat, and the output end is connected to the lifting plate.

[0015] Preferably, a guide cavity is opened on one side of the two pressure plates corresponding to the cam, and a top column is slidably adapted in the guide cavity. The bottom end of the top column is connected to the bottom of the guide cavity through a spring four, and the top end of the top column corresponds to the side of the cam.

[0016] (III) Beneficial effects

[0017] The present invention provides a wheel camshaft accuracy detection device, which has the following beneficial effects:

[0018] 1. The wheel camshaft accuracy detection device, when the detection mechanism is specifically detected, uses the cam as the intermediate conductor to light up the indicator lights on both sides. During the rising process, the guide column and the cam are in constant contact. During the rising process of the detection head, if the two sides of the cam are asymmetrical, the detection head on one side will be separated from the cam, and the indicator light on that side will go out, thereby obtaining the result that the two sides of the cam are asymmetrical.

[0019] 2. The wheel camshaft precision detection device has an error range adjustability by setting a precision adjustment component, and can be adjusted according to the specific quality requirements of the cam symmetry.

[0020] 3. The wheel camshaft accuracy detection device, by setting a centering mechanism, first levels and centers the cam before detection, which helps to improve the accuracy of the detection mechanism during detection and prevents inaccurate detection caused by cam deflection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is an axonometric schematic diagram of the present invention;

[0022] Figure 2 It is a schematic diagram of the structure of the detection mechanism of the present invention;

[0023] Figure 3 It is a half-section schematic diagram of the detection mechanism and linkage parts of the present invention;

[0024] Figure 4 A half-section schematic diagram of the detection mechanism and precision adjustment assembly of the present invention;

[0025] Figure 5 is a side sectional view of the clamping mechanism of the present invention;

[0026] Figure 6 It is a side sectional view of the centering mechanism of the present invention.

[0027] In the figure: 1 base, 2 detection mechanism, 3 linkage, 4 lifting mechanism, 5 centering mechanism, 6 clamping mechanism, 7 slide rail, 8 precision adjustment component, 9 camshaft, 10 cam, 21 fixed sleeve, 22 movable column, 23 detection head, 24 telescopic sleeve, 25 guide column, 26 indicator light, 27 spring one, 28 spring two, 29 spring three, 31 housing, 32 gear, 33 rack one, 34 rack two, 35 connecting rod, 41 moving table, 42 lead screw, 43 slide rod, 44 threaded sleeve, 45 drive motor, 51 support seat, 52 pressure plate, 53 lifting plate, 54 guide groove, 55 slide shaft, 56 cylinder, 57 top column, 58 guide cavity, 59 spring four, 61 V-type seat, 62 splint, 63 spring five, 64 through groove, 65 fixed block, 66 adjusting screw, 81 limit sleeve, 82 limit column, 83 micro motor, 84 screw, 85 nut sleeve. DETAILED DESCRIPTION

[0028] The embodiment of the present invention provides a wheel camshaft accuracy detection device, such as Figure 1-6 As shown, it includes a base 1, a detection mechanism 2, a linkage member 3, a lifting mechanism 4 and a clamping mechanism 6.

[0029] A slide rail 7 is provided on the base 1 along the clamping direction of the cam shaft 9 .

[0030] like Figure 1 and Figure 5 As shown, the clamping mechanism 6 is used to clamp the camshaft 9 with the cam 10. The clamping mechanism 6 includes two groups of V-shaped seats 61, a clamping plate 62, a spring 63, a fixing block 65, and an adjusting screw 66. The V-shaped seat 61 is fixed on the base 1. The top of the V-shaped seat 61 is a vertical section, and the top surface is closed. The clamping plate 62 is vertically slidably adapted on the vertical section of the V-shaped seat 61 and is connected to the top of the V-shaped seat 61 through the spring 63. A through groove 64 is vertically opened on the clamping plate 62. The fixing block 65 is vertically slidably adapted in the through groove 64. The bottom end of the adjusting screw 66 is pivotally connected to the fixing block 65, and the upper section passes through the top of the V-shaped seat 61 and is threadedly connected thereto. A rubber pad is provided at the bottom of the fixing block 65.

[0031] When clamping the camshaft 9, first lift the clamping plate 62 upwards, then place the camshaft 9 on the V-groove of the V-shaped seat 61, and then press down the clamping plate 62. At this time, the camshaft 9 can also be rotated to adjust the angle of the cam 10. After the angle of the cam 10 is adjusted, adjust the fixing block 65 downward by adjusting the screw 66, and press the camshaft 9 on the V-groove through the fixing block 65.

[0032] like Figure 1As shown, the lifting mechanism 4 is arranged on the base 1 and is used to drive the linkage 3 to lift. The lifting mechanism 4 includes a moving platform 41, a lead screw 42, a slide rod 43, a threaded sleeve 44 and a driving motor 45. The bottom of the moving platform 45 is slidably adapted on the slide rail 7 through a slider. The lead screw 42 and the slide rod 43 are vertically arranged on the moving platform 41. The bottom end of the lead screw 42 is pivotally connected to the moving platform 41 through a support seat. The threaded sleeve 44 is threadedly sleeved on the lead screw 42 and connected to the housing 31. The housing 31 is provided with a sliding sleeve that is slidably sleeved on the slide rod 43. The driving motor 45 is arranged at the bottom of the moving platform 41 and is coaxially connected to the lead screw 42. The lead screw 42 is driven to rotate by the driving motor 45, thereby driving the housing 31 to lift.

[0033] like Figure 3 and Figure 4 As shown, the detection mechanism 2 includes two groups of symmetrically arranged detection components, the detection components include a fixed sleeve 21, a movable column 22, a detection head 23, a telescopic sleeve 24, a guide column 25 and an indicator light 26, and the fixed sleeve 21 is fixed to the housing 31 through a support rod. The movable column 22 is axially telescopically connected to the fixed sleeve 21, and is connected to the top of the fixed sleeve 21 through a spring 27, and the movable column 22 can slide and telescope along the axial direction of the fixed sleeve 21. The detection head 23 is arranged at the end of the movable column 22 and corresponds to the side of the cam 10. The detection head 23 is used to detect the symmetry of the side of the cam 10. The movable columns 22 of the two groups of detection components are linked in opposite directions through a linkage 3, the telescopic sleeve 24 is fixed to the fixed sleeve 21, the guide column 25 is axially telescopically connected in the telescopic sleeve 24 and is connected to the top of the telescopic sleeve 24 through a spring 28, and the other end of the guide column 25 is in contact with the side of the cam 10, and the detection head 23, the guide column 25, and the indicator light 26 are connected in series on the same circuit.

[0034] The cam 10 is generally made of iron and has electrical conductivity.

[0035] like Figure 3 As shown, the linkage member 3 includes a shell 31, a gear 32, a rack 1 33, and a rack 2 34. The gear 32 is pivotally connected to the inside of the shell 31. The upper and lower sides of the shell 31 are provided with sliding grooves for the rack 1 33 and the rack 2 34 to slide horizontally. The rack 1 33 and the rack 2 34 are adapted to slide horizontally in the sliding grooves and are respectively engaged with the upper and lower sides of the gear 32. The rack 1 33 and the rack 2 34 are respectively connected to the active columns 22 of the two sets of detection components through connecting rods 35.

[0036] When the detection mechanism 2 is specifically tested, the lifting mechanism 4 drives the detection mechanism 2 to rise, so that the guide post 25 and the detection head 23 gradually contact the side of the cam 10. At this time, the cam 10 is used as an intermediate conductor to light up the indicator lights 26 on both sides. During the rising process, the guide post 25 is in constant contact with the cam 10. During the rising process of the detection head 23, if the A side of the cam 10 is convex compared to the B side in size, the detection head 23 on the A side will move outward. At this time, since the detection head 23 on the B side is in a linkage state with the detection head 23 on the A side, and the B side of the cam 10 is smaller than the A side, the detection head 23 on the B side will be separated from the cam 10. When the detection head 23 on the B side is separated from the cam 10, the indicator light 26 on the B side will go out, thereby obtaining an asymmetric position on both sides of the cam 10.

[0037] Since the symmetry of the two sides of the cam 10 can have a certain range of errors, in order to avoid false alarms within the error range, a precision adjustment component 8 is provided in the movable column 22, and the precision adjustment component 8 includes a limit sleeve 81, a limit column 82, a micro motor 83, a screw 84, and a nut sleeve 85 with a threaded sleeve arranged outside the screw 84. The limit sleeve 81 is fixedly arranged in the middle of the movable column 22, and the detection head 23 is axially telescopically connected to the movable column 22 and connected to the limit sleeve 81 through a spring 29. The micro motor 83 is fixed to the end of the movable column 22, and the screw 84 is coaxially connected to the output shaft of the micro motor 83. The limit column 82 is connected to the nut sleeve 85, and one end passes through the limit sleeve 81 and corresponds to the bottom end of the detection head 23. The spacing between the limit column 82 and the bottom of the detection head 23 is half of the error range value. The micro motor 83 drives the screw 84 to adjust the spacing between the limit column 82 and the detection head 23.

[0038] When the two sides of the cam 10 are asymmetrical, the detection head 23 corresponding to the protrusion A side contracts and contacts the limit column 82, driving the movable column 22 to move, thereby linking the movable column 22 on the B side. If the error value of the B side of the cam 10 is within the range at this time, the detection head 23 on the B side will extend to the limit position under the action of the spring 3 29, so that the detection head 23 is still in contact with the cam 10. The detection mechanism 2 has an adjustable error range and can be adjusted according to the specific quality requirements of the symmetry of the cam 10.

[0039] In order to enable the detection mechanism 2 to more accurately detect the symmetry of the cam 10, the device also includes a centering mechanism 5, which is slidably adapted on the slide rail 7. The centering mechanism 5 is used to calibrate the cam 10 so that the two sides of the cam 10 are symmetrically arranged with respect to the vertical line.

[0040] like Figure 6 As shown, the centering mechanism 5 includes a support base 51, two pressing plates 52, a lifting plate 53, and a cylinder 56. The support base 51 is slidably adapted on the slide rail 7, and the bottom ends of the two pressing plates 52 are hinged on the support base 51. Figure 6 It is a cross-sectional view of the pressing plate 52. It seems that the supporting seat 51 is suspended in the air, but in fact, the supporting seat 51 is slidably fitted on the slide rail 7, and the bottom of the clamping plate 52 is hinged on the supporting seat 51. The two pressing plates 52 are provided with inclined guide grooves 54, and slide shafts 55 are slidably fitted in the guide grooves 54. The two slide shafts 55 are connected to the lifting plate 53. The cylinder 56 is vertically arranged on the supporting seat 51, and the output end is connected to the lifting plate 53.

[0041] A guide cavity 58 is provided on one side of the two pressure plates 52 corresponding to the cam 10, and a top column 57 is slidably adapted in the guide cavity 58. The bottom end of the top column 57 is connected to the bottom of the guide cavity 58 through a spring four 59, and the top end of the top column 57 corresponds to the side of the cam 10.

[0042] During the specific centering operation, the two clamping plates 52 are first moved to the two sides of the corresponding cam 10, and then the lifting plate 53 is driven to rise by the cylinder 56, and then the two clamping plates 52 are clamped inward from both sides through the guidance of the sliding shaft 55. Since the clamping plates 52 on both sides are clamped synchronously, the cam 10 will swing adaptively between the clamping plates 52 until it is clamped in the center by the clamping plates 52, and then the camshaft 9 is fastened by the fixing block 65.

[0043] A detection method for a wheel camshaft accuracy detection device:

[0044] Step 1: Place the camshaft 9 on the V-groove of the V-seat 61 and then clamp it with the clamping plate 62 .

[0045] Step 2: Move the centering mechanism 5 to the cam 10 to be tested, and then drive the two clamping plates 52 to clamp inward from both sides. The cam 10 will adaptively swing to the center between the clamping plates 52.

[0046] Step three: adjust the fixing block 65 by adjusting the screw 66 to tighten the camshaft 9.

[0047] Step 4, move the detection mechanism 2 to the cam 10 to be detected, and drive the detection mechanism 2 to rise through the lifting mechanism 4, so that the guide column 25 and the detection head 23 gradually contact the side of the cam 10. At this time, the cam 10 is used as an intermediate conductor to make the indicator lights 26 on both sides light up.

[0048] Step five, the lifting mechanism 4 continuously drives the guide post 25 and the detection head 23 to rise, wherein the guide post 25 is in constant contact with the cam 10. During the rising process of the detection head 23, if the two sides of the cam 10 are asymmetrical, the detection head 23 on one side will detach from the cam 10, and the indicator light 26 on that side will go out, thereby obtaining the result that the two sides of the cam 10 are asymmetrical.

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wheel camshaft accuracy detection device, characterized in that: The invention comprises a base (1), a detection mechanism (2), a linkage member (3), a lifting mechanism (4) and a clamping mechanism (6); the clamping mechanism (6) is used to clamp a camshaft (9) with a cam (10); the lifting mechanism (4) is arranged on the base (1) and is used to drive the linkage member (3) to rise and fall; the detection mechanism (2) comprises two groups of symmetrically arranged detection components, the detection components comprising a fixed sleeve (21), a movable column (22), a detection head (23), a telescopic sleeve (24), a guide column (25) and an indicator light (26); the movable column (22) is axially telescopically connected to the fixed sleeve (21) and is spring-loaded. (27) is connected to the top end of the fixed sleeve (21), the detection head (23) is arranged at the end of the movable column (22) and corresponds to the side of the cam (10), the movable columns (22) of the two detection components are linked in opposite directions through the linkage member (3), the telescopic sleeve (24) is fixed on the fixed sleeve (21), the guide column (25) is axially telescopically connected in the telescopic sleeve (24) and connected to the top end of the telescopic sleeve (24) through the spring 2 (28), the other end of the guide column (25) is in contact with the side of the cam (10), and the detection head (23), the guide column (25) and the indicator light (26) are connected in series on the same circuit.

2. A wheel camshaft accuracy detection device according to claim 1, characterized in that: The linkage member (3) comprises a housing (31), a gear (32), a rack 1 (33), and a rack 2 (34); the gear (32) is pivotally connected to the inside of the housing (31); the rack 1 (33) and the rack 2 (34) are adapted to slide transversely in the housing (31) and are respectively meshed with the upper and lower sides of the gear (32); the rack 1 (33) and the rack 2 (34) are respectively connected to the movable columns (22) of the two detection components through connecting rods (35).

3. The wheel camshaft accuracy detection device according to claim 1, characterized in that: The movable column (22) is provided with a precision adjustment component (8), and the precision adjustment component (8) comprises a limit sleeve (81), a limit column (82), a micro motor (83), a screw rod (84), and a nut sleeve (85) threadedly sleeved on the outside of the screw rod (84); the limit sleeve (81) is fixedly arranged in the middle of the movable column (22); the detection head (23) is axially telescopically connected to the movable column (22) and is connected to the limit sleeve (81) through a spring three (29); the micro motor (83) is fixed to the end of the movable column (22); the screw rod (84) is coaxially connected to the output shaft of the micro motor (83); the limit column (82) is connected to the nut sleeve (85), and one end of the limit column passes through the limit sleeve (81) and corresponds to the bottom end of the detection head (23).

4. A wheel camshaft accuracy detection device according to claim 2, characterized in that: A slide rail (7) is arranged on the base (1) along the clamping direction of the cam shaft (9); the lifting mechanism (4) comprises a moving platform (41), a lead screw (42), a slide rod (43), a threaded sleeve (44) and a driving motor (45); the moving platform (45) is slidably adapted on the slide rail (7); the lead screw (42) and the slide rod (43) are vertically arranged on the moving platform (41); the threaded sleeve (44) is threadedly sleeved on the lead screw (42) and connected to the housing (31); a sliding sleeve is arranged on the housing (31) and is slidably sleeved on the slide rod (43); the driving motor (45) is arranged at the bottom of the moving platform (41) and is coaxially connected to the lead screw (42).

5. The wheel camshaft accuracy detection device according to claim 1, characterized in that: The clamping mechanism (6) comprises two groups of V-shaped seats (61), a clamping plate (62), a spring five (63), a fixed block (65), and an adjusting screw (66). The V-shaped seat (61) is fixed on the base (1). The top of the V-shaped seat (61) is in a vertical closed shape. The clamping plate (62) is vertically slidably adapted on the vertical section of the V-shaped seat (61) and is connected to the top of the V-shaped seat (61) through the spring five (63). A through groove (64) is vertically opened on the clamping plate (62). The fixed block (65) is vertically slidably adapted in the through groove (64). The bottom end of the adjusting screw (66) is pivotally connected to the fixed block (65), and the upper section passes through the top of the V-shaped seat (61) and is threadedly connected thereto.

6. A wheel camshaft accuracy detection device according to claim 4, characterized in that: It also comprises a centering mechanism (5), which is slidably fitted on the slide rail (7), and is used to calibrate the cam (10) so that the two sides of the cam (10) are symmetrically arranged with the vertical line as a reference.

7. A wheel camshaft accuracy detection device according to claim 6, characterized in that: The centering mechanism (5) comprises a support seat (51), two pressure plates (52), a lifting plate (53), and a cylinder (56); the support seat (51) is slidably adapted on a slide rail (7); the bottom ends of the two pressure plates (52) are hinged on the support seat (51); the two pressure plates (52) are provided with inclined guide grooves (54); a sliding shaft (55) is slidably adapted in the guide groove (54); the two sliding shafts (55) are connected to the lifting plate (53); the cylinder (56) is vertically arranged on the support seat (51), and the output end is connected to the lifting plate (53).

8. The wheel camshaft accuracy detection device according to claim 7, characterized in that: A guide cavity (58) is provided on one side of the two pressure plates (52) corresponding to the cam (10), and a top column (57) is slidably adapted in the guide cavity (58). The bottom end of the top column (57) is connected to the bottom of the guide cavity (58) through a spring four (59), and the top end of the top column (57) corresponds to the side of the cam (10).

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