CN103439120B - Based on belt driven type calibrating apparatus for four-wheel positioning instrument - Google Patents

Abstract

The invention discloses a testing device for a four-wheel aligner based on a belt drive, aiming at overcoming the problem that the quality test of a 3D four-wheel aligner cannot be performed. It includes a toe-in zero-point inspection frame, a front frame inspection part, a rear frame inspection part, a right belt transmission device and a left belt transmission device. The left belt drive consists of a drive pulley, a front driven pulley, a front sensor jacket, a rear sensor jacket, a rear driven pulley and a belt. The driving pulley is set in the toe-in zero-point inspection frame, and the outer end of the long ground caster shaft of the front left combined support leg is keyed, and the right end of the front sensor jacket is set in the left end of the front transverse shaft in the inspection part of the left front desk and locked. The front driven pulley set is keyed in the middle of the front sensor jacket, the right end of the rear sensor jacket is set on the left end of the rear transverse shaft in the left background inspection part and locked, and the rear driven pulley is set on the rear sensor jacket The middle part is keyed and connected, and the belt is installed in the wheel grooves of the driving pulley, the front driven pulley and the rear driven pulley.

Description

Verification device based on belt-driven four-wheel aligner

technical field

The present invention relates to a kind of automobile detection equipment used in the field of automobile industry, more specifically, it relates to a kind of verification device based on belt drive type four-wheel aligner.

Background technique

The car's handling stability and straight-line driving performance are guaranteed by the reasonable matching of the car's wheel alignment parameters. Any misalignment of the parameters will cause the car to lose its handling stability and straight-line driving ability, accelerate tire wear, increase fuel consumption, and reduce safety And other issues.

The four-wheel aligner is the most important testing equipment for checking the wheel alignment parameters. At present, there are more than 30,000 four-wheel aligners in the country, and they are increasing at an annual rate of 30%. Ensure the detection accuracy of the four-wheel aligner itself.

The four-wheel aligner has multiple functions, such as detecting wheel camber, toe-in, kingpin caster, kingpin inclination, and the maximum steering angle and containment angle of the wheel. The detection of the above parameters by the four-wheel aligner can be realized by different detection methods and sensors, because the caster angle and the inclination angle of the kingpin cannot be directly measured by the sensor of the four-wheel aligner, but indirectly measured by the corresponding mathematical model Therefore, it is extremely difficult to test the detection accuracy of different four-wheel aligners.

At present, there are mainly four types of inspection devices used by wheel aligner manufacturers:

1. Inclination fixed calibration device

The device can only check the detection accuracy of the four-wheel aligner for measuring the camber angle and the toe angle, but cannot test the accuracy of the four-wheel aligner for detecting the caster angle and the kingpin inclination angle.

2. Inspection device for four-wheel aligner researched and developed by Jilin University

The Chinese patent announcement number is CN 1181327 B, and the announcement date is December 22, 2004, and the patent number is ZL 03 1 10944.6, inventor: Su Jian. This patent completes the simulation of the wheel alignment angle through a series of linkages. The device has the following problems in use:

1) The structure is complex, the processing precision is high, and the cost is increased;

2) The transmission chain is long and the cumulative error is large;

3) The measurement method of kingpin inclination and kingpin camber is vernier measurement, which is complicated to manufacture;

4) The thrust angle and steering angle cannot be tested.

3. Calibration device for four-wheel aligner researched and developed by Liaoning Provincial Institute of Metrology

The device has the following problems in use:

1) The structure is complex, the processing precision is high, and the cost is increased;

2) The transmission chain is long and the cumulative error is large;

3) Kingpin caster angle and steering angle cannot be inspected;

4) The left and right wheels cannot move independently, and the front and rear axles cannot move independently;

5) Calibration accuracy, principle, and parameters do not meet the requirements of the Ministry of Communications standard JT/T505-2004.

4. The verification device of the four-wheel aligner of the vertical and horizontal plane unrelated angle adjustment type researched and developed by Jilin University

The device has the following problems in use:

1) The equipment is large in size, and generally cannot be moved after installation and leveling. Therefore, the verification device is suitable for the situation of infrequent movement;

2) Angle measurement is carried out with a dividing head. On the one hand, the data reading time is longer, and on the other hand, the weight and cost of the equipment are increased;

3) The spherical guide rail structure is used for force transmission, which requires high machining accuracy for the spherical guide rail;

4) The front and rear axle split structure is adopted, which increases the equipment leveling time;

5) Although the self-centering chuck can be used for precise positioning, it increases the overall weight of the equipment.

5. The verification device of the integrated vehicle-mounted digital display four-wheel aligner researched and developed by Jilin University

The device has the following problems in use:

1) The caster angle and the inclination angle of the kingpin are adjusted by using an arc-shaped guide rail. The arc-shaped guide rail has high processing precision and increases the processing cost;

2) The inclination angle of the kingpin is adjusted through the screw nut, and this set of transmission mechanism increases the weight of the equipment and the processing cost;

3) The lower end of the simulated kingpin is connected to the cross shaft through the upper steering, which increases the connection link. Since the equipment requires the axis of the simulated kingpin to pass through the center of the cross shaft, it is difficult to assemble.

6. Calibration device for portable digital display vehicle four-wheel aligner researched and developed by Jilin University

The device has the following problems in use:

1) The overall equipment is bulky and inconvenient to transport;

2) During the zero-point inspection process, the sensor is prone to unstable or no indication, which affects the verification quality of the four-wheel aligner;

3) The locking mechanism of the upper and lower rails has a complex structure, which increases the processing and assembly costs.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the problem in the prior art that the quality inspection of the 3D four-wheel aligner widely used in the market cannot be realized, and to provide a device with the functions of simulating the synchronous rotation of automobile wheels and various positioning angles, and the accuracy Higher than the detection accuracy of the 3D four-wheel aligner, it can meet the requirements of the national quality supervision department and the manufacturer for the rapid verification of the quality of the 3D four-wheel aligner. It is a belt-driven four-wheel aligner verification device.

In order to solve the above-mentioned technical problems, the present invention is realized by adopting the following technical scheme: the verification device based on the belt-driven four-wheel aligner includes a toe-in zero point inspection frame, a front frame inspection part, a rear frame inspection part and a belt drive device. Described belt transmission device comprises right belt transmission device and left belt transmission device, and left belt transmission device comprises driving pulley, front driven pulley, front sensor jacket, rear sensor jacket, rear driven pulley and belt.

The outer end of the long ground caster shaft in the front left combined support leg of the toe-in zero-point inspection stand is set by a key connection, and the right end of the front sensor jacket is set on the front transverse shaft of the left front desk inspection part. The left end is locked by the locking knob of the front sensor jacket, the front driven pulley is set in the middle of the front sensor jacket for key connection, and the right end of the rear sensor jacket is set on the left end of the rear transverse shaft in the left background inspection part And use the rear sensor jacket locking knob to lock, the rear driven pulley is set in the middle of the rear sensor jacket as a key connection, and the belt is installed on the pulley of the driving pulley, front driven pulley and rear driven pulley in the slot.

The right belt drive described in the technical proposal has the same structure as the left belt drive, and the right belt drive also includes a driving pulley, a front driven pulley, a front sensor jacket, a rear sensor jacket, and a rear driven belt. Wheels and belts. The outer end of the long ground caster shaft in the front right combination support leg of the toe-in zero-point inspection stand is set by the key connection, and the left end of the front sensor jacket is set on the front transverse shaft of the right front desk inspection part. The right end is locked by the locking knob of the front sensor jacket, the front driven pulley is set in the middle of the front sensor jacket for key connection, and the left end of the rear sensor jacket is set on the right end of the rear transverse shaft in the inspection part of the right background And use the rear sensor jacket locking knob to lock, the rear driven pulley is set in the middle of the rear sensor jacket as a key connection, and the belt is installed on the pulley of the driving pulley, front driven pulley and rear driven pulley in the slot.

The toe-in zero-point inspection frame described in the technical solution includes a front crossbeam, a rear crossbeam, a right longitudinal beam, a left longitudinal beam, a front right combined support leg, a front left combined support leg, a rear right combined support leg and a rear left combined support leg. The two ends of the front beam and the through holes at the front end of the right longitudinal beam and the left longitudinal beam are fitted and fixedly connected with nuts; A planar rectangular frame, the vertically arranged front right combined support legs, front left combined support legs, rear right combined support legs are in contact with the top surface of the rear left combined support legs and the bottom surfaces of the four corners of the rectangular frame and fixed by screws . The front frame inspection part is installed on the front end of the right longitudinal beam and the left longitudinal beam in the toe-in zero-point inspection frame, and the front end of the front frame inspection part is installed on the right longitudinal beam and the left longitudinal beam in the toe-in zero-point inspection frame. The rear end of the beam is bolted.

Both the front right combined support leg and the front left combined support leg described in the technical solution include ground casters, long ground caster shafts, ground caster brackets, ground caster connecting plates, supporting leg round tubes, supporting leg connecting plates, and supporting leg adjustment Screw and support leg base. The upper end of the supporting leg round tube is welded with a supporting leg connecting plate, the lower end of the supporting leg round tube is welded with a caster connecting plate, the caster connecting plate is threadedly connected with the upper end of the supporting leg adjusting screw, and the lower end of the supporting leg adjusting screw supports the leg The base is welded and connected, and the axis of the supporting leg adjusting screw is perpendicular to the bottom surface of the supporting leg base. The top mounting plate of the caster bracket and the caster connecting plate are connected by bolts, and the bottom surface of the top mounting plate of the caster bracket is vertically fixed and installed with two parallel mounting arms with horizontal through holes processed at the lower end, and the long caster shaft adopts bearings Installed in the horizontal through hole on the caster bracket for rotation connection, the caster is set on the long caster shaft between the two vertical mounting arms in the caster bracket for key connection, and the driving pulley is set in the caster bracket The long ground caster axles on the outside of the vertical mounting arms are keyed.

The supporting leg connecting plate described in the technical solution is a rectangular flat plate structure, the slotted holes for mounting screws are evenly arranged on the supporting leg connecting plate, and the supporting leg connecting plate is perpendicular to the rotation axis of the supporting leg circular tube. The caster connecting plate is a rectangular flat structure, four through holes are evenly arranged in the left half of the caster connecting plate, and a threaded hole is processed in the right half of the caster connecting plate along the centerline direction of the supporting leg circular tube. The caster connecting plate is perpendicular to the axis of rotation of the round tube of the supporting leg.

The rear right combined support leg and the rear left combined support leg described in the technical proposal are not identical in structure to the short caster shaft and the long ground caster shaft, the other components of the rear right combined support leg and the rear left combined support leg are the same as the front right The component structure of the combined support leg is the same as that of the front left combined support leg, that is, the rear right combined support leg and the rear left combined support leg are ground casters, short caster shafts, caster brackets, ground caster connecting plates, and support leg round tubes , a supporting leg connecting plate, a supporting leg adjusting screw and a supporting leg base. The support leg round tube is a rod structure made of a round tube, the upper end of which is welded with a rectangular support leg connecting plate perpendicular to the axis of rotation of the support leg round tube, and the lower end of the support leg round tube is welded to the support leg circle. The rectangular ground caster connecting plate with the pipe rotation axis vertical, the ground caster connecting plate is threadedly connected with the upper part of the supporting leg adjusting screw, the lower end of the supporting leg adjusting screw is welded with the supporting leg base, the rotating axis of the supporting leg adjusting screw is connected with the bottom surface of the supporting leg base Vertical; the caster wheel bracket is a fork-shaped member, the top of which is the top mounting plate with 4 through holes evenly arranged, the top mounting plate and the caster wheel connecting plate are connected by bolts, and the bottom surface of the top mounting plate is vertically fixed and installed two parallel to each other The lower end is processed with a mounting arm with a horizontal through hole. The short caster shaft is installed in the horizontal through hole on the two vertical mounting arms in the caster bracket with bearings for rotational connection. The caster is set in two vertical mounting arms in the caster bracket Keyed connections on short ground caster axles between straight mounting arms.

The inspection part of the front frame described in the technical proposal is composed of a front base, a left front inspection part, a right front inspection part and a connecting rod. The parts and components that make up the left foreground inspection part and the right foreground inspection part have the same structure. The front base is a frame structure welded by section steel and steel plate. The bottom surface of both ends of the front base and the right front mounting platform of the right longitudinal beam are in contact with the left front mounting platform of the left longitudinal beam and are fixedly connected by positioning pins and bolts. The front base The left and right installation planes are machined at both ends of the upper table, and there are through holes and T-shaped slots on the left and right installation planes. The plane and the right installation plane are fixed with screws, the rotation axis of the front transverse shaft with the same structure in the left front inspection part and the right front inspection part are collinear, and the two structures in the left front inspection part and the right front inspection part The same front transverse axis points to the left and right sides, and the inspection part of the left front desk is connected with the inspection part of the right front desk through connecting rods.

The inspection part of the left front desk and the inspection part of the right front desk described in the technical proposal are composed of a horizontal rotation angle adjustment part, a mechanical interface and a horizontal positioning part, and a kingpin inclination adjustment part. The horizontal rotation angle adjustment part in the inspection part of the left front desk includes the analog kingpin, the vertical measuring disc, the front rotary screw nut, the front rotary screw, the front rotary screw seat, the front rotary screw hand wheel, and the front rotary screw seat support plate , Analog kingpin connection sleeve, kingpin fork, connecting rod support, kingpin fork support, front rotary disc, front rotary screw nut support, connecting pin shaft and central shaft. The front turntable is fixed and installed on the left installation plane of the front base with screws, the kingpin fork bracket and the front turntable are connected in rotation, and the central shaft is inserted into the through hole on the two fork walls of the kingpin fork bracket for rotation connection. The kingpin yoke is rotationally connected with a connecting pin shaft and a central shaft, and the lower end of the simulated kingpin is inserted into the top end of the kingpin yoke as a fixed connection. The vertical measuring disc is fixedly installed on the upper end of the analog kingpin, and the connecting sleeve of the analog kingpin is fixedly connected on the simulated kingpin. The bottom of the screw seat is rotatably connected with the support plate of the rotary screw seat at the front desk, and the support plate of the rotary screw seat at the front desk is fixed on the left processing plane of the front base, and the rotary screw at the front desk is inserted into the screw seat on the rotary screw seat at the front desk. The hole is connected by rotation, the rear end of the front rotary screw is fixedly connected with the hand wheel of the front rotary screw, the front end and the front rotary screw nut are equipped with a threaded connection, and the front rotary screw nut and the front rotary screw nut support are rotationally connected. The rotary nut support of the front desk is fixedly connected to the bottom end of the right end face of the main pin fork bracket; the mechanical interface and horizontal positioning part in the inspection part of the left front desk include the swing arm, the connecting block of the transverse axis, the tie rod of the transverse axis, the front transverse axis and the horizontal positioning part. Zero positioning block. The fork at the right end of the swing arm is set on both ends of the central shaft for a flexible connection, the right end of the front cross shaft is inserted into the through hole at the left end of the swing arm for a fixed connection, the cross shaft connecting block is set and fixed on the front cross shaft, the front cross shaft The left end is inserted into the right end of the front sensor jacket for fixed connection, the left end of the horizontal axis rod is fixed on the rear side of the horizontal axis connecting block with screws, the right end of the horizontal axis rod is screwed to the rear side of the analog kingpin connection sleeve, and the zero point is positioned The block is placed on the left installation plane of the front base, and the top surface of the zero point positioning block is in contact with the bottom surface of the left end of the swing arm; Support, kingpin caster angle encoder rigid support, kingpin caster angle encoder, short rocker arm, lower lead screw clutch), lower lead screw seat, lower lead screw, upper lead screw, upper lead screw clutch, upper lead screw seat, upper slide rail, kingpin upper slider, kingpin lower slider, long rocker arm, kingpin inclination encoder rigid support, kingpin inclination encoder, kingpin inclination encoder bracket, long rocker arm support Seat, short rocker arm locking handle, lower rail, upper slider locking screw, lower slider locking screw, long rocker arm locking handle, upper rail slider and lower rail slider. The short rocker arm support is fixed on the left mounting surface of the front base, the kingpin caster angle encoder is connected with the upper end of the rigid bracket of the kingpin caster angle encoder with screws, and the lower end of the rigid bracket of the kingpin caster angle encoder is connected with the kingpin The right end of the caster angle encoder bracket is fixedly connected, the left end of the kingpin caster angle encoder bracket is screwed to the right end of the short rocker arm support, and the rotation shaft of the kingpin caster angle encoder is inserted into the two channels at the upper end of the short rocker arm support. In the hole, the locking handle of the short rocker arm is inserted into the through hole before the gap on the left support arm for rotational connection, and the screw hole after the locking handle of the short rocker arm is inserted into the gap on the left support arm at the same time is threaded connection, and the short rocker arm The lower end is set on the rotation shaft of the kingpin caster angle encoder to be fixedly connected. The right end of the sliding rail is inserted into the through hole at the upper end of the short rocker arm and fixedly connected with the screw in the through hole at the lower end of the lower screw seat. The left end of the cylindrical sliding rail is inserted into the In the through hole of the slider of the lower rail, the lower screw and the lower screw seat are dynamically fitted with the through hole of the lower screw clutch, the left end of the lower screw is threadedly connected with the threaded hole on the slider of the lower rail, and the The right end is fixedly connected with the lower lead screw adjustment knob.

The background frame inspection part described in the technical solution includes a background base, a right background inspection part and a left background inspection part. The components that make up the right background inspection part and the left background inspection part have the same structure. The backstage base is a welded assembly welded by channel steel and steel plate. The bottom surfaces at both ends of the backstage base and the rear right mounting platform at the rear end of the right longitudinal beam in the toe-in zero point inspection frame are in contact with the rear left mounting platform at the rear end of the left longitudinal beam. The positioning pins and screws are used to fix the connection, and the two ends of the table top on the background base are machined into the right installation plane and the left installation plane. , the two rear horizontal axes in the right background inspection part and the left background inspection part point to the right and the left, and the rotation axes of the two rear horizontal axes in the right background inspection part and the left background inspection part should be collinear.

Both the left background inspection part and the right background inspection part described in the technical solution include the rear horizontal axis, the background stand, the background lifting screw seat, the background lifting screw, the horizontal seat, the background rotary screw seat cushion, and the background rotary screw seat , background rotary screw, horizontal angle encoder, bearing seat pad, horizontal angle encoder rigid bracket, wheel camber encoder, wheel camber angle encoder rigid bracket, background rotary table and background lifting bracket. The backstage turntable is fixedly installed on the left installation plane of the backstage base with screws and the bearing seat pad, the backstage upright seat is rotatably connected with the backstage turntable using bearings, and the horizontal angle encoder is installed on the backstage base with the rigid support of the horizontal angle encoder. On the bottom surface, the rotating shaft of the horizontal angle encoder is inserted into the backstage base, the bearing seat pad is connected with the rear of the backstage rotary table and the backstage stand with screws, the shell of the wheel camber encoder is fixedly connected with the rigid support of the wheel camber angle encoder, and the wheel The lower end of the rigid bracket of the camber encoder is fixedly installed on the front end of the backstage stand, and the rotation shaft of the wheel camber encoder is inserted into the two through holes at the upper ends of the left front support arm and the left rear support arm in the backstage stand for rotational connection. Set on the rotating shaft of the wheel camber angle encoder for fixed connection, the rear horizontal shaft is processed into a stepped shaft, the left end of the rear horizontal shaft is inserted into the through hole at the right end of the horizontal seat to form a fixed connection, and the left end of the backstage lifting bracket is fixedly installed on the backstage stand On the right end surface of the middle left rear support arm, the background lifting screw seat is rotatably connected to the front surface of the left end of the background lifting bracket. The background lifting screw is inserted into the through hole of the background lifting screw seat and threaded with the horizontal seat. The installation shaft at the lower end of the bar seat is inserted into the background rotary screw seat cushion and rotated to connect it to the right installation plane of the background base. The left end of the background rotary screw is inserted into the through hole of the background rotary screw seat and fixedly connected with the background rotary screw adjustment knob , the right end of the background rotary leading screw is threadedly connected with the front end of the background stand. The horizontal rotation angle encoder, the wheel camber angle encoder and the axis of rotation of the rear transverse shaft intersect perpendicularly at one point.

Compared with prior art, the beneficial effects of the present invention are:

1. The verification device based on the belt-driven four-wheel aligner of the present invention is improved on the basis of the original split and disassembled automobile four-wheel aligner verification device. It adopts a combined support leg structure and is based on the belt-driven four-wheel The wheel aligner verification device can not only work stationary on the workbench, but also work on the workbench moving back and forth.

2. The belt-driven four-wheel aligner verification device of the present invention adds a belt synchronous transmission device, realizing the front sensor jacket marked as 101 and the rear sensor jacket marked as 103 and the ground caster marked as 4 Synchronous rotation, thus realizing the verification of the 3D four-wheel aligner.

Description of drawings

Below in conjunction with accompanying drawing, the present invention will be further described:

Fig. 1 is an axonometric projection drawing based on the structural composition of the belt-driven four-wheel aligner verification device of the present invention;

Fig. 2 is an axonometric projection view of the toe-in zero-point inspection frame structure based on the belt-driven four-wheel aligner verification device of the present invention;

Fig. 3 is an axonometric projection view of the structure of the front combined support leg in the belt-driven four-wheel aligner verification device according to the present invention;

Fig. 4 is an axonometric projection view of the rear combined supporting leg structure in the belt-driven four-wheel aligner verification device according to the present invention;

Fig. 5 is an axonometric projection view of the front frame inspection part in the belt-driven four-wheel aligner verification device according to the present invention;

Fig. 6 is an axonometric projection view of the horizontal rotation angle adjustment part in the front frame inspection part of the belt-driven four-wheel aligner verification device according to the present invention;

Fig. 7 is an axonometric projection view of the left front stage inspection part in the front stage inspection part in the belt-driven four-wheel aligner verification device according to the present invention;

Fig. 8 is an axonometric projection view of the left front stage inspection part in the front stage inspection part in the belt-driven four-wheel aligner verification device according to the present invention after being rotated by 180 degrees;

Fig. 9 is an axonometric projection view of the background frame inspection part in the belt-driven four-wheel aligner verification device according to the present invention;

Fig. 10 is an axonometric projection view of the right background inspection part of the background frame inspection part in the belt-driven four-wheel aligner verification device according to the present invention;

Fig. 11 is an axonometric projection view of the right background inspection part in the background frame inspection part of the belt-driven four-wheel aligner verification device according to the present invention after being rotated by 180 degrees;

Fig. 12 is an axonometric projection view of the structure of the left belt drive device in the verification device of the belt-driven four-wheel aligner according to the present invention;

In the figure: 1. Toe-in zero-point inspection frame, 2. Front frame inspection part, 3. Background frame inspection part, 4. Ground casters, 5. Front beam, 6. Rear beam, 7. Right longitudinal beam, 8. Left Stringer, 9. Front right combination support leg, 10. Front left combination support leg, 11. Rear right combination support leg, 12. Rear left combination support leg, 13. Front desk base, 14. Left front desk inspection part, 15. Right Front inspection part, 16. Connecting rod, 17. Swing arm, 18. Horizontal axis connection block, 19. Right belt transmission device, 20. Left belt transmission device, 21. Horizontal axis tie rod, 22. Analog kingpin, 23. Vertical Measuring plate, 24. Revolving screw nut at the front desk, 25. Revolving lead screw at the front desk, 26. Revolving screw seat at the front desk, 27. Hand wheel of the revolving screw screw at the front desk, 28. Support plate of the revolving screw seat at the front desk, 29. Locking screw, 30. Analog kingpin connection sleeve, 31. Kingpin fork, 32. Front cross shaft, 33. Connecting rod support, 34. Kingpin fork bracket, 35. Front rotary table, 36. Kingpin caster angle encoder bracket, 37. Short rocker arm support, 38. Kingpin caster angle encoder rigid support, 39. Kingpin caster angle encoder, 40. Short rocker arm, 41. Lower lead screw clutch, 42. Lower lead screw adjustment knob, 43 .Lower lead screw seat, 44. Lower lead screw, 45. Upper lead screw, 46. Upper lead screw clutch, 47. Upper lead screw seat, 48. Upper lead screw adjustment knob, 49. Upper slide rail, 50. King pin Upper slider, 51. Kingpin lower slider, 52. Long rocker arm, 53. Kingpin inclination encoder rigid support, 54. Kingpin inclination encoder, 55. Kingpin inclination encoder bracket, 56. Long rocker arm support, 57. front rotary dial pointer, 58. short rocker arm locking handle, 59. front rotary nut support, 60. lower rail, 61. upper slider locking screw, 62. lower slider Locking screw, 63. Locking handle of long rocker arm, 64. Upper rail slider, 65. Lower rail slider, 66. Connecting pin shaft, 67. Central shaft lock nut, 68. Long ground caster shaft, 69 .Backstage base, 70. Right backstage inspection part, 71. Left backstage inspection part, 72. Short caster shaft, 73. Rear horizontal axis, 74. Backstage stand, 75. Backstage lift screw adjustment knob, 76. Backstage lift Lead screw seat, 77. background lifting screw, 78. horizontal seat, 79. background rotary screw adjustment knob, 80. background rotary screw seat cushion, 81. background rotary screw seat, 82. background rotary screw, 83. Horizontal angle encoder, 84. Bearing seat pad, 85. Background base connecting plate, 86. Wheel camber encoder, 87. Rigid support for wheel camber encoder, 88. Background rotary table pointer, 89. Background rotary table, 90 .Backstage lifting bracket, 91. Zero point positioning block, 92. Central shaft, 93. Driving pulley, 94. Ground caster bracket, 95. Ground caster connecting plate, 96. Supporting leg round tube, 97. Supporting leg connecting plate, 98 .Supporting leg adjustment screw, 99. Supporting leg base, 100. Front driven pulley, 101. Front sensor jacket, 102. Front sensor jacket locking knob, 103. rear sensor jacket, 104. rear sensor jacket locking knob, 105. rear driven pulley, 106. belt.

Detailed ways

The present invention is described in detail below in conjunction with accompanying drawing:

Referring to Fig. 1, the verification device based on the belt-driven four-wheel aligner of the present invention mainly consists of a toe-in zero-point inspection frame 1, a front frame inspection part 2, a background frame inspection part 3 and a belt drive (comprising a right belt drive 19 and the left belt drive 20) form. The toe-in zero-point inspection frame 1 is used as the installation base of the front-end frame inspection part 2 and the back-end frame inspection part 3 to complete the inspection of the toe-in zero point of the four-wheel aligner; the front-end frame inspection part 2 is installed on the toe-in zero-point inspection frame 1 The right longitudinal beam 7 and the left longitudinal beam 8 are fixedly connected by bolts on the front mounting platform, and the caster angle, kingpin inclination angle, toe-in angle, camber angle and wheel rotation angle of the four-wheel aligner are completed. Parameter inspection; the backstage frame inspection part 3 is installed on the rear mounting platform of the right longitudinal beam 7 and the left longitudinal beam 8 in the toe-in zero-point inspection frame 1 and is fixedly connected by bolts to complete the rear wheel toe-in of the four-wheel aligner. Angle, wheel camber, wheel angle parameters inspection; the right belt transmission device 19 is respectively through the front sensor jacket 101 and the rear sensor jacket 103 and the front cross shaft 32 and the rear cross shaft 73 on the right side of the device are locked and connected, the left The belt transmission device 20 adopts locking connection with the front cross shaft 32 and the rear cross shaft 73 on the left side of the device through the front sensor jacket 101 and the rear sensor jacket 103 respectively.

Referring to Fig. 2, the toe-in zero-point test stand 1 is mainly composed of a front crossbeam 5, a rear crossbeam 6, a right longitudinal beam 7, a left longitudinal beam 8, a front right combination support leg 9, a front left combination support leg 10, a rear right combination The supporting leg 11 is formed with the rear left combination supporting leg 12.

The front crossbeam 5 and the rear crossbeam 6 are rod-type structural members with the same structure. The middle sections of the front beam 5 and the rear beam 6 are the front middle beam and the rear middle beam made of round pipes, and the two ends are the left and right stepped shafts with the same structure, and are fixedly connected by welding, that is, the two ends of the front middle beam are welded and fixed There is a front left stepped shaft and a front right stepped shaft, the front left stepped shaft, the front middle beam and the front right stepped shaft are on the same axis of rotation; the two ends of the rear middle beam are welded and fixed with a rear left stepped shaft and a rear right stepped shaft, and the rear The axes of rotation of the left stepped shaft, the rear middle beam and the rear right stepped shaft are collinear. The front left stepped shaft, the front right stepped shaft, the rear left stepped shaft and the rear right stepped shaft have the same structure. The diameter shaft and the small diameter optical shaft are composed, and one (outer) end of the large diameter shaft is a threaded end processed with threads, and the large diameter shaft and the through holes at the front and rear ends of the right longitudinal beam 7 and the left longitudinal beam 8 are assembled and then nuts and The threaded end of the large-diameter shaft is fixedly connected, and the other end of the large-diameter shaft is a connection end connected with the two ends of the front middle beam and the rear middle beam. The threaded end of the large-diameter shaft of the front left stepped shaft, the front right stepped shaft, the rear left stepped shaft and the rear right stepped shaft is connected with one end of the small-diameter optical shaft into one body.

The right longitudinal beam 7 and the left longitudinal beam 8 are rod-like structural members made of square tubes with the same structure. The upper working surfaces of the front end and the rear end of the right longitudinal beam 7 are respectively welded with the right front installation platform for installing the front frame inspection part 2 and the right rear installation platform for installing the background frame inspection part 3, and the upper working surfaces of the front and rear ends of the left longitudinal beam 8 are respectively The left front installation platform of the front frame inspection part 2 and the left rear installation platform of the rear frame inspection part 3 are welded; the front and rear ends of the right longitudinal beam 7 are horizontally provided with the front right step shaft and the rear right step shaft. The front right through hole and the rear right through hole, and the front and rear ends of the left longitudinal beam 8 are horizontally provided with a front left through hole and a rear left through hole for installing the front left stepped shaft and the rear left stepped shaft. The axis of rotation of the front right through hole on the right longitudinal beam 7 and the rear right through hole and the side where the front right through hole is perpendicular to the side where the rear right through hole is located, the rotation of the front left through hole and the rear left through hole on the left longitudinal beam 8 The axis and the front left through hole are perpendicular to the side where the rear left through hole is located, and the right hole distance between the front right through hole on the right longitudinal beam 7 and the rear right through hole is the same as the front left through hole on the left longitudinal beam 8 and the rear left side. The left holes of the through holes are equally spaced.

The front left large-diameter shaft and the front right large-diameter shaft among the front left stepped shaft and the front right stepped shaft at the two ends of the front crossbeam 5 and the front left through hole and the front right through hole at the front ends of the left longitudinal beam 8 and the right longitudinal beam 7 are assembled , using the front left nut and the front right nut and the front left stepped shaft and the front right stepped shaft to be fixedly connected with the front left large-diameter shaft and the front right large-diameter shaft; the rear left stepped shaft and the rear right The rear left large-diameter shaft and the rear right large-diameter shaft in the stepped shaft are assembled with the rear left through hole and the rear right through hole at the rear end of the left longitudinal beam 8 and the right longitudinal beam 7, and the rear left nut and the rear right nut and the rear left nut are adopted. The rear left large-diameter shaft and the rear right large-diameter shaft in the stepped shaft and the rear right stepped shaft are screwed and fixedly connected to form a horizontally placed rectangular frame.

Referring to Fig. 3, the front combined support leg includes a front right combined support leg 9 and a front left combined support leg 10, both of which have the same structure, and the front right combined support leg 9 and the front left combined support leg 10 all include ground casters 4 , long ground caster shaft 68, driving pulley 93, ground caster support 94, ground caster connecting plate 95, supporting leg pipe 96, supporting leg connecting plate 97, supporting leg adjusting screw rod 98 and supporting leg base 99.

The support leg round tube 96 is a rod structure made of a round tube, its upper end is welded to a rectangular support leg connecting plate 97 perpendicular to the axis of rotation of the supporting leg round tube 96, and the supporting leg connecting plate 97 is evenly arranged with installation The slotted hole of the screw; the lower end of the supporting leg round tube 96 is welded with a rectangular caster connecting plate 95 perpendicular to the supporting leg round tube 96 axes of rotation, and 4 through holes are evenly arranged on the left half of the supporting leg connecting plate 95; A threaded hole is processed on the right half of the connecting plate 95 along the centerline direction of the supporting leg circular pipe 96, and is threadedly connected with the upper part of the supporting leg adjusting screw rod 98. The lower end of the supporting leg adjusting screw rod 98 is welded with a supporting leg base 99, and the supporting leg adjusting screw rod The axis of 98 is perpendicular to the bottom end face of support leg base 99. The height of the front right combination support leg 9 and the front left combination support leg 10 can be adjusted by rotating the support leg base 99. The caster bracket 94 is a fork-shaped member, the top is a top mounting plate with 4 through holes evenly arranged, the top mounting plate and the caster connecting plate 95 are connected by bolts, and two parallel mounting plates are installed vertically on the bottom surface of the top mounting plate. The lower end of the lower end is processed with a mounting arm with a horizontal through hole, and the long ground caster shaft 68 adopts bearings to be installed in the horizontal through hole on the ground caster bracket 94 for rotation connection, and the ground caster 4 is set in two vertical mounting arms in the ground caster bracket 94 The long ground caster shaft 68 between is keyed connection, and driving pulley 93 is sleeved on the long ground caster shaft 68 of the vertical mounting arm outside in the ground caster support 94 and is keyed connection.

Referring to Figure 4, the rear combined support leg includes a rear right combined support leg 11 and a rear left combined support leg 12, both of which have the same structure, the rear right combined support leg 11 and the rear left combined support leg 12 except for the short caster axle 72 Unlike the long ground caster axle 68, the rear right combination support leg 11 and the rear left combination support leg 12 are the same as the parts of the front right combination support leg 9 and the front left combination support leg 10, that is, the rear right combination The support leg 11 and the rear left combination support leg 12 all include ground casters 4, short ground caster axles 72, ground caster brackets 94, ground caster connecting plates 95, supporting leg round pipes 96, supporting leg connecting plates 97, supporting leg adjusting screws 98 and support leg base 99.

The support leg round tube 96 is a rod structure made of a round tube, its upper end is welded to a rectangular support leg connecting plate 97 perpendicular to the axis of rotation of the supporting leg round tube 96, and the supporting leg connecting plate 97 is evenly arranged with installation The slotted hole of the screw; the lower end of the supporting leg round pipe 96 is welded with the rectangular ground caster connecting plate 95 perpendicular to the supporting leg round tube 96 axes of rotation, and 4 through holes are evenly arranged on the left half of the ground caster connecting plate 95; the ground caster is connected The right half of the plate 95 processes a threaded hole along the centerline direction of the supporting leg circular pipe 96, and is threadedly connected with the upper part of the supporting leg adjusting screw rod 98. The lower end of the supporting leg adjusting screw rod 98 is welded with a supporting leg base 99, and the supporting leg adjusting screw rod 98 is The axis is perpendicular to the bottom end surface of the support leg base 99 . The height of the rear right combination support leg 11 and the rear left combination support leg 12 can be adjusted by rotating the support leg base 99. The caster bracket 94 is a fork-shaped member, the top is a top mounting plate with 4 through holes evenly arranged, the top mounting plate and the caster connecting plate 95 are connected by bolts, and two parallel mounting plates are installed vertically on the bottom surface of the top mounting plate. The lower end of the lower end is processed with the mounting arm of the horizontal through hole, and the short ground caster shaft 72 adopts bearings to be installed in the horizontal through holes on the two vertical mounting arms in the ground caster bracket 94 for rotation connection, and the ground caster 4 is sleeved on the ground caster bracket 94 The short ground caster axle 72 between the two vertical mounting arms is a key connection.

The front right combination support leg 9, the front left combination support leg 10, the rear right combination support leg 11 and the rear left combination support leg 12 are all vertically installed on the bottom surface of the four corners of the rectangular frame through the support leg connecting plate 97 , and secure the connection with screws. Rotate the front right combination support leg 9, the front left combination support leg 10, the back right combination support leg 11 and the support leg base 99 to four ground casters 4 at the bottom of the rear left combination support leg 12 are suspended in the air, and the four corners of the rectangular frame can be adjusted Height, make the toe-in zero-point inspection frame 1 in a horizontal state, make the verification device based on the belt-driven four-wheel aligner work on the workbench; rotate the front right combined support leg 9, the front left combined support leg 10, and the rear right combined support Leg 11 and rear left combined supporting leg base 99 to four supporting leg bases 99 at the bottom of supporting leg 12 are suspended in the air, so that four ground casters 4 are grounded, and the verification device based on the belt-driven four-wheel aligner can be moved back and forth on the workbench Work.

Referring to FIG. 5 , the front frame inspection part 2 is mainly composed of a front base 13 , a left front inspection part 14 , a right front inspection part 15 and a connecting rod 16 .

The front base 13 is a frame-type structural part welded with section steel and steel plate. The left and right ends of the table top on the front base 13 are processed with left and right mounting planes, and through holes and T-shaped grooves are processed on the left and right mounting planes. The front desk base 13 is installed on the front mounting platform of the toe-in zero-point inspection frame 1, that is, it is installed on the left front mounting platform at the front end of the left longitudinal beam 8 and the right front mounting platform at the front end of the right longitudinal beam 7, and is fixed with positioning pins and screws. The left and right front desk inspection parts 14 and the right front desk inspection part 15 are successively installed on the left and right installation planes of the upper table top of the front desk base 13, and the assembled left front desk inspection part 14 and the right front desk inspection part 15 are mirror-symmetrically installed on the upper desk base 13 of the front desk base. On the left and right installation planes, the axes of rotation of the front transverse shafts 32 of the two sensor jackets in the left front stage inspection part 14 and the right front stage inspection part 15 will be collinear.

The left front stage inspection part 14 and the right front stage inspection part 15 in the front stage frame inspection part 2 are connected by a connecting rod 16, and the part structures of the left front stage inspection part 14 and the right front stage inspection part 15 are formed. The front inspection part 15 is composed of a horizontal rotation angle adjustment part, a mechanical interface, a horizontal positioning part and a kingpin inclination adjustment part.

Left front inspection section 14 in front shelf inspection section 2:

1. Referring to Figures 6 to 8, the horizontal angle adjustment part includes an analog kingpin 22, a vertical measuring plate 23, a front rotary screw nut 24, a front rotary screw 25, a front rotary screw seat 26, and a front rotary screw handwheel. 27. Front rotary screw seat support plate 28, locking screw 29, analog kingpin connection sleeve 30, kingpin fork 31, connecting rod support 33, kingpin fork support 34, front rotary disk 35, front rotary disk pointer 57 , the front desk rotary nut support 59, connecting pin shaft 66, central axis 92.

The front turntable 35 is fixedly installed on the left installation plane in the upper table top of the front base 13 with screws, the bottom end surface of the kingpin fork support 34 is connected with the top surface of the front turntable 35, and the kingpin fork support 34 is connected with the front turntable 35. Adopt bearing (with vertical bearing pin) to be rotationally connected between, central shaft 92 is inserted in the through hole on the two fork walls of kingpin fork bracket 34 and is rotationally connected, and central shaft 92 between kingpin fork bracket 34 two fork walls A radial through hole is processed in the middle position along the diameter direction, and the kingpin yoke 31 (two forked arms) is connected with the connecting pin shaft 66 and the central shaft 92 in rotation through the radial through hole, and the kingpin yoke 31 is connected with the kingpin yoke bracket. Between 34, become the rotating connection of two directions. One (lower) end of the simulated kingpin 22 is inserted into the top through hole of the kingpin fork 31 to form a fixed connection; the other (upper) end is fixedly installed with a vertical measuring disc 23 (the upper plane of the vertical measuring disc 23 is perpendicular to the axis of the simulated kingpin) . The dummy kingpin connection sleeve 30 is fixedly set on the dummy kingpin 22 , and the locking screw 29 is threadedly connected to the rear side of the dummy kingpin connection sleeve 30 . One (rear) side of the bottom (under the through hole on the two fork walls) of the kingpin fork support 34 is fixedly connected with a front desk rotary disk pointer 57 with screws, and the pointer points to the scale on the front desk rotary disk 35; the other (front) side Adopt screw to be fixedly connected with connecting rod bearing 33, the left end of connecting rod 16 adopts bearing (with bearing pin) and connecting rod bearing 33 to become rotationally connected, the right-hand member of connecting rod 16 adopts the bearing with identical structure (with bearing pin) Shaft) and the same connecting rod bearing 33 of structure in the right front desk inspection part 15 become rotationally connected, and promptly connecting rod 16 has connected the left front desk inspection part 14 and the right front desk inspection part 15.

The bottom of the front desk rotary screw seat 26 is rotationally connected with the front desk rotary screw seat support plate 28, the front desk rotary screw seat support plate 28 is fixed on the left mounting plane in the upper table top of the front desk base 13, and the front desk rotary screw screw 25 is inserted into the front desk In the lead screw seat through hole on the rotary screw seat 26 and by means of bearings, it is rotationally connected. end) is fixedly connected with the front desk rotary screw hand wheel 27, and the other (front) end is threadedly connected with the front desk rotary screw nut 24. The front desk rotary screw nut 24 is rotationally connected with the front desk rotary screw nut support 59, and the front desk rotary screw nut support 59 is fixedly connected to the bottom of one side parallel to the through hole axes on the king pin fork support 34 with the two fork walls with screws. End, promptly is fixed on the bottom end of the right end face of king pin yoke support 34.

2. Referring to Figure 6 and Figure 7, the mechanical interface and horizontal positioning part are mainly composed of swing arm 17, horizontal axis connection block 18, horizontal axis tie rod 21, front horizontal axis 32, central axis lock nut 67 and zero point positioning block 91.

The fork at the right end of the swing arm 17 is set on the two ends of the central shaft 92 for rotational connection. The central shaft lock nut 67 is used to lock one (rear) end of the central shaft 92. The front cross shaft 32 is processed into a stepped shaft, and the front cross shaft One (right) end of 32 inserts in the through hole of swing arm 17 left ends and becomes fixedly connected, and cross-axis connecting block 18 sleeves are fixed on front cross-axis 32. The horizontal axis pull rod 21 is processed into a bent sheet structure, and one (left) end is fixed on the one (rear) side of the horizontal axis connecting block 18 with a screw, and the locking screw 29 passes through the other (right) end of the horizontal axis pull rod 21 The long arc-shaped through hole on the top is threaded with the analog kingpin connection sleeve 30-(rear) side. The bottom of zero point positioning block 91 is horizontally placed on the left installation plane of front desk base 13, and the top surface of zero point positioning block 91 is connected with the bottom surface of swing arm 17 left ends, so that front cross axis 32 can be in horizontal state.

3. Referring to Fig. 7 and Fig. 8, the kingpin inclination adjustment part is mainly composed of a kingpin caster angle encoder bracket 36, a short rocker arm support 37, a kingpin caster angle encoder rigid support 38, a kingpin caster angle encoder 39, Short rocker arm 40, lower lead screw clutch 41, lower lead screw adjustment knob 42, lower lead screw seat 43, lower lead screw 44, upper lead screw 45, upper lead screw clutch 46, upper lead screw seat 47, upper lead screw adjustment Knob 48, upper rail 49, kingpin upper slider 50, kingpin lower slider 51, long rocker arm 52, kingpin inclination encoder rigid support 53, kingpin inclination encoder 54, kingpin inclination encoder Device bracket 55, long rocker arm support 56, short rocker arm locking handle 58, lower rail 60, upper slider locking screw 61, lower slider locking screw 62, long rocker arm locking handle 63, upper rail Slide block 64 and lower rail slide block 65 form.

The short rocker arm support 37 is a fork-shaped member, and its lower end is a rectangular mounting base plate, on which two upper ends are processed with the support arms with the through holes of the horizontal collinear axis of rotation, that is, the left support arm and the right support are provided. arm. The mounting bottom plate of the short rocker arm bearing 37 lower ends is fixed on the left mounting plane of the front desk base 13 with screws, and the housing of the kingpin caster angle encoder 39 and one (upper) end of the kingpin caster angle encoder rigid support 38 are used Screw is fixedly connected, and the other (lower) end of kingpin caster angle encoder rigid support 38 is fixedly connected with the right end of kingpin caster angle encoder support 36, and the other (left) end of kingpin caster angle encoder support 36 is connected with The right end of the short rocker arm support 37 is fixedly connected with screws, the rotation shaft of the kingpin caster angle encoder 39 is inserted into the two through holes at the upper end of the short rocker arm support 37, and an opening is processed on the upper hole wall of the left support arm through hole. Slit, in the direction perpendicular to the opening slit on the left support arm, the through hole is processed on the front side of the slit, the threaded hole is processed on the rear side of the slit, the front end of the short rocker arm locking handle 58 is processed with threads, and the short rocker arm locking handle 58 is inserted into the left support The through hole before the slit on the arm is to be rotated and connected, and is threadedly connected with the threaded hole behind the slit, and the rotating shaft of the kingpin caster angle encoder 39 can be locked by turning the short rocker arm locking handle 58 . One (lower) end of the short rocking arm 40 is fixedly connected on the rotating shaft of the kingpin caster angle encoder 39 by the through hole sleeve on it, the left and right sides of the short rocking arm 40 and the two sides of the short rocking arm support 37 The two inner surfaces of the support arm are connected by surface contact and can be relatively rotated. The lower rail 60 is an optical shaft member processed with a shaft shoulder. The right end of the lower rail 60 (the center line of the end surface is processed with a threaded hole) is inserted into the through hole at the other (upper) end of the short rocker arm 40 and the lower end of the lower screw seat 43. In the through hole, and then fixedly connected by screws, the other (left) end of the cylindrical down rail 60 is inserted into the through hole of the down rail slider 65, the connection between the lower screw 44 and the lower screw seat 43 and the lower screw clutch 41 The hole is dynamically matched and connected, and one (left) end of the lower leading screw 44 is threadedly connected with the threaded hole on the slide rail slider 65, and the other (right) end of the lower leading screw 44 is fixedly connected with the lower leading screw adjustment knob 42.

The long rocker arm support 56 is a fork-shaped member, and its lower end is a rectangular mounting base plate, and two upper ends are set on the rectangular mounting base plate to process the support arms with the through holes of the axis of rotation horizontal collinear, that is to say, the front support arm and the through hole are provided. Rear support arm. Long rocker arm support 56 adopts screw to be fixed on the left installation plane of front desk base 13 by its installation bottom plate, promptly is installed on the left installation plane of short rocker arm support 37 left fronts, and the housing of kingpin inclination angle encoder 54 One (upper) end of the kingpin inclination encoder rigid support 53 is fixedly connected with a screw, and the other (lower) end of the kingpin inclination encoder rigid support 53 is fixedly connected with the front end of the kingpin inclination encoder support 55, The other (rear) end of the kingpin inclination angle encoder support 55 is fixedly connected with the front support arm of the long rocker arm support 56, and the rotating shaft of the kingpin inclination angle encoder 54 is inserted into the front support in the rocker arm support 56 In the two through holes on the upper end of the arm and the rear support arm, an opening gap is processed on the top hole wall of the through hole of the rear support arm, and a through hole is processed on the right side of the gap perpendicular to the opening gap of the rear support arm, and a hole is processed on the left side of the gap. The threaded hole, the through hole and the axis of rotation of the threaded hole are horizontally collinear, and the front end of the long rocker arm locking handle 63 is processed with threads, and the long rocker arm locking handle 63 is inserted into the through hole on the right side of the upper end gap of the rear support arm for rotational connection. And be threadedly connected with the threaded hole on the left side of the slit, and the rotating shaft of the kingpin inclination encoder 54 can be locked by turning the long rocker arm locking handle 63 . The through hole of long rocking arm 52 one (lower) ends is set on the rotating shaft of the kingpin inclination encoder 54 between the front support arm and the rear support arm in the long rocking arm support 56 and becomes fixedly connected, and the long rocking arm 52 The two inner surfaces of the front support arm and the rear support arm in the two sides and the long rocker arm bearing 56 are surface contact connections, which can be relatively rotated. The upper slide rail 49 is an optical shaft member processed with a shaft shoulder. The front end of the upper slide rail 49 (with a threaded hole processed at the center line of the end face) is inserted into the through hole at the other (upper) end of the long rocker arm 52 and the upper screw seat 47 The through hole at the lower end is fixedly connected by screws, and the other (rear) end of the cylindrical upper slide rail 49 is inserted in the through hole of the upper slide rail slider 64, and the upper leading screw 45 is connected with the upper leading screw seat 47 and the upper leading screw clutch 46 The through hole of the moving fit is connected, and one (rear) end of the upper leading screw 45 is threadedly connected with the threaded hole on the upper slide rail slider 64, and the other (front) end is fixedly connected with the upper leading screw adjustment knob 48.

After the installation, the axis of the kingpin caster angle encoder 39 rotating shaft, the axis of the kingpin inclination angle encoder 54 rotating shaft, and the axis of rotation of the front desk rotating disk 35 are perpendicular to each other and intersect at the axis of the center shaft 92 and the axis of the connecting pin shaft 66. On the intersection point, the axis of the front transverse shaft 32 is collinear with the axis of the kingpin caster angle encoder 39 rotating shafts, and the axis of the simulated kingpin 22 is collinear with the axis of rotation of the foreground rotary disk 35.

The horizontal rotation angle adjustment part in the left front desk inspection part 14 is fixed on the left installation plane of the upper table top of the front desk base 13, and the kingpin inclination adjustment part of the kingpin inclination adjustment part is fixed on the front desk base 13 along the axial direction of the central axis 92. On the table, that is, when standing at the rotary screw handwheel 27 at the front desk and looking down at the verification device, the horizontal angle adjustment part is the center, and the kingpin inclination adjustment part is above the horizontal angle adjustment part. The kingpin caster adjustment part is fixed on the upper platform of the front desk base 13 in a vertical direction with the axis of the central axis 92, that is, the kingpin inclination adjustment part is on the left side of the horizontal rotation angle adjustment part. The angle between the center connection line between the horizontal rotation angle adjustment part and the kingpin inclination adjustment part and the center connection line between the horizontal rotation angle adjustment part and the kingpin caster angle adjustment part is a right angle. The mechanical interface and the level adjustment part are installed on the right side of the horizontal angle adjustment part, and are on the same line as the kingpin caster angle adjustment part.

Referring to FIG. 9 , the background frame inspection part 3 is mainly composed of a background base 69 , a right background inspection part 70 and a left background inspection part 71 .

Backstage base 69 is a welded assembly welded with channel steel and steel plate, and its upper table top two ends will process installation plane and through hole, promptly the upper table top of backstage base 69 processes left installation plane and right installation plane. The background base 69 is installed on the rear mounting platform of the toe-in zero-point inspection frame 1, that is, it is installed on the rear left mounting platform at the rear end of the left longitudinal beam 8 and the rear right mounting platform at the rear end of the right longitudinal beam 7, and is fixed with positioning pins and screws . The left background inspection part 71 and the right background inspection part 70 are installed at the two ends of the upper stage of the background base 69, to be precise, the left background inspection part 71 and the right background inspection part 70 are mirror-symmetrically installed on the left installation plane of the upper stage of the background base 69 On the right installation plane, the two rear transverse axes 73 in the left background inspection part 71 and the right background inspection part 70 point to the left and right sides, and the two rear transverse axes in the left background inspection part 71 and the right background inspection part 70 The axes of 73 should be collinear.

The right background inspection part 70 in the background frame inspection part 3:

Referring to Fig. 10 and Fig. 11, the part structure that forms left background inspection part 71 and right background inspection part 70 is identical, and left background inspection part 71 and right background inspection part 70 are mirror-symmetrically installed on the two ends of background base 69, left background inspection The part 71 and the right background inspection part 70 are all composed of a rear transverse shaft 73, a background stand 74, a background lifting screw adjustment knob 75, a background lifting screw seat 76, a background lifting screw 77, a horizontal seat 78, and a background rotary screw adjustment knob. 79. Background rotary screw seat cushion 80, background rotary screw seat 81, background rotary screw 82, horizontal angle encoder 83, bearing seat pad 84, horizontal angle encoder rigid support 85, wheel camber angle encoder 86, wheel The camber encoder rigid support 87, the background rotary disk pointer 88, the background rotary disk 89 and the background lifting support 90 are formed.

The backstage rotary disk 89 passes through the bearing seat pad 84 and is fixedly installed on the left rear installation plane of the background base 69 with screws. The backstage stand 74 adopts a bearing (with a vertical pin) to be rotationally connected with the background rotary disk 89, and the horizontal angle of rotation is coded. Device 83 is installed on the bottom surface of background base 69, and the shell of horizontal angle encoder 83 is fixedly connected with horizontal angle encoder rigid bracket 85, and horizontal angle encoder rigid bracket 85 is fixedly installed on the bottom surface of background base 69, and horizontal angle encoder The rotating shaft of 83 inserts backstage base 69, bearing seat pad 84 and backstage upright seat 74 to be fixedly connected by screw after backstage rotary disc 89, backstage upright seat 74 is a fork-shaped member, and its lower end is a platform, made two on the platform The upper end is processed with a support arm with a through hole with a horizontal axis of rotation collinear, that is, a left front support arm and a left rear support arm are provided. The shell of wheel camber angle encoder 86 is fixedly connected with the upper end of wheel camber angle encoder rigid support 87, and the lower end of wheel camber angle encoder rigid support 87 is fixedly installed on one (front) end of the platform in the background stand 74, and the wheel The shaft of rotation of camber angle encoder 86 adopts bearing to pack into the left front support arm in the backstage stand 74 and two through holes on the left rear support arm become rotationally connected, and cross seat 78 is sleeved on the rotation shaft of wheel camber angle encoder 86 and becomes fixed Connect, its both sides (front and rear sides) surface and two support arm two inner surfaces of backstage upright seat 74 are surface contact connection, can relatively rotate. Rear cross shaft 73 is processed into stepped shaft, and one (right) end of rear cross shaft 73 inserts in the through hole of cross seat 78 left ends and becomes fixedly connected. Background lifting support 90 becomes Z type, and one (left) end of background lifting support 90 is fixedly installed on one (right) side of backstage stand 74 left rear support arms, and background lifting screw seat 76 is rotatably connected on background lifting support 90 On the front end face of the other (right) end of the background, the backstage lifting screw 77 is inserted in the through hole of the background lifting screw seat 76 and is threadedly connected with the cross seat 78 below the background lifting screw seat 76, and the upper end of the background lifting screw 77 is connected with The background lifting screw adjusting knob 75 is fixedly connected. The installation shaft at the lower end of the backstage rotary screw seat 81 is inserted into the backstage rotary screw seat pad 80 and rotated to be connected to the left rear mounting plane on the table top of the backstage base 69, and one (left) end of the backstage rotary screw 82 is inserted into the backstage rotary screw The through hole of the seat 81 is fixedly connected with the backstage rotary screw adjustment knob 79, and the other (right) end of the backstage rotary screw 82 is threadedly connected with the front end of the backstage stand 74. After installation, it will reach the level of the rotation axis of the horizontal angle encoder 83. The axis of the wheel camber angle encoder 86 rotating shaft, the axis of rotation of the rear cross shaft 73 are perpendicular to each other and intersect at one point.

Referring to Fig. 12, the described belt transmission device comprises a left belt transmission device 20 and a right belt transmission device 19, and the components of the left belt transmission device 20 and the right belt transmission device 19 have the same structure. The left belt drive 20 is mainly composed of a driving pulley 93, a front driven pulley 100, a front sensor jacket 101, two structurally identical front sensor jacket locking knobs 102, a rear sensor jacket 103, and two structurally identical The rear sensor jacket lock knob 104, the rear driven pulley 105 and the belt 106 are composed.

The other (outer) end of the driving pulley 93 and the long ground caster shaft 68 is fixedly connected by a key.

The front sensor jacket 101 is a sleeve-shaped structural member, two threaded holes are processed on one side of the busbar, and the front driven pulley 100 is set in the middle of the front sensor jacket 101 for key connection. The right end of the front sensor jacket 101 is set on the left end of the front cross shaft 32 in the inspection part 14 of the left front desk, and the right end of the front cross shaft 32 is fixed to the right end of the front sensor jacket 101 by rotating the right front sensor jacket locking knob 102 Connection, the right front sensor jacket locking knob 102 is threaded with the front sensor jacket 101. The installation shaft of the front sensor is inserted into the left end of the front sensor jacket 101, and the left front sensor jacket locking knob 102 is rotated to connect the installation shaft of the front sensor to the left end of the front sensor jacket 101, and the left front sensor jacket is locked. The knob 102 is threadedly connected with the front sensor jacket 101 .

The rear sensor jacket 103 is a sleeve-shaped structural part, two threaded holes are processed on one side of the busbar, and the rear driven pulley 105 is fixedly connected with the rear sensor jacket 103 by a key, and is located in the rear sensor jacket 103. middle position. Insert the left end of the rear cross shaft 73 in the left background inspection part 71 into the right end of the rear sensor jacket 103, and rotate the right rear sensor jacket locking knob 104 to fix the left end of the rear cross shaft 73 to the right end of the rear sensor jacket 103 , the right rear sensor jacket locking knob 104 is threadedly connected with the rear sensor jacket 103 . The mounting shaft of the rear sensor is inserted into the left end of the rear sensor jacket 103, and the left rear sensor jacket locking knob 104 is rotated to connect the mounting shaft of the rear sensor to the left end of the rear sensor jacket 103, and the left rear sensor jacket is locked. The knob 104 is threadedly connected with the rear sensor jacket 103 .

Described belt 106 is installed in the wheel groove of driving pulley 93, front driven pulley 100, rear driven pulley 105.

When the driving device is required to move forward and backward after installation, the ground caster 4 drives the driving pulley 93 to rotate synchronously through the long ground caster shaft 68, and the driving pulley 93 drives the front driven pulley 100 and the rear driven pulley 105 to rotate synchronously by the belt 106. Therefore, the front sensor and the rear sensor are respectively driven to rotate synchronously by the front sensor jacket 101 and the rear sensor jacket 103 .

The operation method of verifying the 3D four-wheel aligner based on the belt-driven four-wheel aligner verification device:

1. Assemble and install the toe-in zero-point inspection frame 1 according to the requirements; respectively adjust the supporting leg base 99 in the front right combined supporting leg 9, the front left combined supporting leg 10, the rear right combined supporting leg 11 and the rear left combined supporting leg 12 Make it suspended in the air, so that the four ground casters 4 land on the ground;

2. Install the installed and debugged front frame inspection part 2 and background frame inspection part 3 respectively on the front installation platform and the rear installation platform on the toe-in zero point inspection frame 1, and fix them with positioning pins and screws;

3. Install the assembled left belt transmission device 20 and right belt transmission device 19 on the left and right sides of the toe-in zero-point inspection frame 1 respectively;

4. Place the assembled belt-driven four-wheel aligner verification device on the lifting frame of the 3D four-wheel aligner, install and adjust the front two sensors and the back two sensors;

5. Follow the steps of the 3D four-wheel aligner to verify the angle of the four wheels of the car, and complete the measurement of the parameters of the four wheels;

6. Comparing the parameter values measured by the 3D four-wheel aligner with those measured by the belt-driven four-wheel aligner verification device, the quality verification of the 3D four-wheel aligner can be completed.

Claims (10)

1. one kind based on belt driven type calibrating apparatus for four-wheel positioning instrument, include prenex test jig at zero point (1), front platform inspection part (2), rear stand check portion divides (3) and belt transmission, it is characterized in that, described belt transmission includes right leather belt gearing (19) and left leather belt gearing (20), left leather belt gearing (20) includes driving pulley (93), front driven pulley (100), front sensor chuck (101), rear sensor chuck (103), rear driven pulley (105) and belt (106),

The outer end that described driving pulley (93) is sleeved on long ground caster axle (68) in the front left combined support leg (10) in prenex test jig at zero point (1) is that key connects, the right-hand member of front sensor chuck (101) is sleeved on the left end of the front transverse axis (32) in left front inspection part (14) and adopts front sensor chuck locking knob (102) to lock, the middle that front driven pulley (100) is sleeved on front sensor chuck (101) is that key connects, the right-hand member of rear sensor chuck (103) is sleeved on the left end of the rear cross shaft (73) in left back inspection part (71) and adopts rear sensor chuck locking knob (104) locking, the middle that rear driven pulley (105) is sleeved on rear sensor chuck (103) is that key connects, belt (106) is arranged on driving pulley (93), front driven pulley (100) is with the race of rear driven pulley (105).

2. according to according to claim 1 based on belt driven type calibrating apparatus for four-wheel positioning instrument, it is characterized in that, described right leather belt gearing (19) is identical with the structure of left leather belt gearing (20), and right leather belt gearing (19) also includes driving pulley (93), front driven pulley (100), front sensor chuck (101), rear sensor chuck (103), rear driven pulley (105) and belt (106);

The outer end that described driving pulley (93) is sleeved on long ground caster axle (68) in the front right combined support leg (9) in prenex test jig at zero point (1) is that key connects, the left end of front sensor chuck (101) is sleeved on the right-hand member of the front transverse axis (32) in right front inspection part (15) and adopts front sensor chuck locking knob (102) to lock, the middle that front driven pulley (100) is sleeved on front sensor chuck (101) is that key connects, the left end of rear sensor chuck (103) is sleeved on the right-hand member of the rear cross shaft (73) in right back inspection part (71) and adopts rear sensor chuck locking knob (104) locking, the middle that rear driven pulley (105) is sleeved on rear sensor chuck (103) is that key connects, belt (106) is arranged on driving pulley (93), front driven pulley (100) is with the race of rear driven pulley (105).

3. according to according to claim 1 based on belt driven type calibrating apparatus for four-wheel positioning instrument, it is characterized in that, described prenex test jig at zero point (1) comprises front beam (5), rear cross beam (6), right vertical beam (7), left longeron (8), front right combined support leg (9), front left combined support leg (10), rear right combined support leg (11) and rear left combined support leg (12);

The two ends of front beam (5) and right vertical beam (7) are equipped with the through hole of left longeron (8) front end and adopt nut to be fixedly connected with, the two ends of rear cross beam (6) and right vertical beam (7) are equipped with the through hole of left longeron (8) rear end and adopt nut to be fixedly connected with becomes the rectangular frame of a plane, and the front right combined support leg (9) vertically arranged, front left combined support leg (10), rear right combined support leg (11) and the top end face of rear left combined support leg (12) contact with the bottom surface at four angles of rectangular frame and adopt and be screwed;

The right vertical beam (7) that described front platform inspection part (2) is arranged in prenex test jig at zero point (1) is that bolt is fixedly connected with the front end of left longeron (8), and the right vertical beam (7) that rear stand check portion divides (3) to be arranged in prenex test jig at zero point (1) is that bolt is fixedly connected with the rear end of left longeron (8).

4. according to according to claim 3 based on belt driven type calibrating apparatus for four-wheel positioning instrument, it is characterized in that, described front right combined support leg (9) and front left combined support leg (10) all include ground castor (4), long ground caster axle (68), trundle bracket (94), castor connecting board (95), supporting leg pipe (96), supporting leg web joint (97), supporting leg adjusting screw(rod) (98) and supporting leg base (99);

The upper end of described supporting leg pipe (96) is welded with supporting leg web joint (97), the lower end of supporting leg pipe (96) is welded with ground castor connecting board (95), ground castor connecting board (95) is connected with supporting leg adjusting screw(rod) (98) threaded upper ends, lower end supporting leg base (99) of supporting leg adjusting screw(rod) (98) is welded to connect, the axis of supporting leg adjusting screw(rod) (98) and the plane perpendicular of supporting leg base (99), the top installing plate on ground trundle bracket (94) is with bolts with ground castor connecting board (95), on the installing plate bottom surface, top on ground trundle bracket (94), vertically fixed installation two lower ends be parallel to each other are processed with the hold-down arm of horizontal through hole, the horizontal through hole that long ground caster axle (68) adopts bearing to be arranged on ground trundle bracket (94) is interior for being rotationally connected, it is key connection that ground castor (4) is sleeved on long ground caster axle (68) in ground trundle bracket (94) between two vertical hold-down arms upper, it is key connection that driving pulley (93) to be sleeved in ground trundle bracket (94) long ground caster axle (68) outside vertical hold-down arm upper.

5. according to according to claim 4 based on belt driven type calibrating apparatus for four-wheel positioning instrument, it is characterized in that, the slab construction part that described supporting leg web joint (97) is rectangle, supporting leg web joint (97) is evenly arranged the slotted eye of mounting screw, supporting leg web joint (97) is vertical with the axis of rotation of supporting leg pipe (96);

The slab construction part that described ground castor connecting board (95) is rectangle, ground castor connecting board (95) left-half is evenly arranged 4 through holes, ground castor connecting board (95) right half part processes a threaded hole along the centerline direction of supporting leg pipe (96), and ground castor connecting board (95) is vertical with the axis of rotation of supporting leg pipe (96).

6. according to according to claim 3 based on belt driven type calibrating apparatus for four-wheel positioning instrument, it is characterized in that, described rear right combined support leg (11) and rear left combined support leg (12) are except short ground caster axle (72) is not identical with long ground caster axle (68) structure, other parts and front right combined support leg (9) of rear right combined support leg (11) and rear left combined support leg (12) is identical with the component structural in front left combined support leg (10), i.e. rear right combined support leg (11) and rear left combined support leg (12) all castors (4), short ground caster axle (72), ground trundle bracket (94), ground castor connecting board (95), supporting leg pipe (96), supporting leg web joint (97), supporting leg adjusting screw(rod) (98) and supporting leg base (99),

Described supporting leg pipe (96) is the bar class formation part be made up of pipe, its upper end is welded with the supporting leg web joint (97) of the rectangle vertical with supporting leg pipe (96) axis of rotation, the ground castor connecting board (95) of the rectangle vertical with supporting leg pipe (96) axis of rotation is welded in the lower end of supporting leg pipe (96), ground castor connecting board (95) is threaded with supporting leg adjusting screw(rod) (98) top, the lower end of supporting leg adjusting screw(rod) (98) is welded with supporting leg base (99), the axis of rotation of supporting leg adjusting screw(rod) (98) and the plane perpendicular of supporting leg base (99), ground trundle bracket (94) is a forked members, top is the top installing plate being evenly arranged 4 through holes, top installing plate is with bolts with ground castor connecting board (95), on installing plate bottom surface, top, vertically fixed installation two lower ends be parallel to each other are processed with the hold-down arm of horizontal through hole, the horizontal through hole that short ground caster axle (72) adopts bearing to be arranged in ground trundle bracket (94) on two vertical hold-down arms is interior for being rotationally connected, ground castor (4) the short ground caster axle (72) be sleeved in ground trundle bracket (94) between two vertical hold-down arms is above that key connects.

7. according to according to claim 1 based on belt driven type calibrating apparatus for four-wheel positioning instrument, it is characterized in that, described front platform inspection part (2) is made up of foreground base (13), left front inspection part (14), right front inspection part (15) and connecting link (16);

Left front inspection part (14) described in composition checks the component structural of part (15) identical with right front;

Foreground base (13) is a tower structure part with shaped steel and Plate Welding, the bottom surface at foreground base (13) two ends and the right front erecting bed of right vertical beam (7) contact with the left front erecting bed of left longeron (8) and adopt register pin to be fixedly connected with bolt, the two ends of foreground base (13) upper table surface process left mounting plane and right mounting plane, left mounting plane and right mounting plane are provided with through hole and T-slot, left front inspection part (14) check partly (15) to be arranged on successively on left mounting plane on foreground base (13) and right mounting plane and is adopted be screwed with right front, part (14) is checked to check the axis of rotation conllinear of the front transverse axis (32) that two structures in part (15) are identical with right front for left front, left front inspection part (14) checks the identical front transverse axis (32) of two structures in part (15) to point to the left and right sides with right front, left front inspection part (14) checks part (15) to be connected by connecting link (16) with right front.

8. according to according to claim 7 based on belt driven type calibrating apparatus for four-wheel positioning instrument, it is characterized in that, left front described inspection part (14) checks part (15) to be all made up of level angle adjustment member, mechanical interface and horizontal location part and caster adjustment member with right front;

Level angle adjustment member in left front inspection part (14) includes simulation stub (22), vertical survey dish (23), foreground revolution screw (24), foreground revolution leading screw (25), foreground revolution leading screw seat (26), foreground revolution leading screw handwheel (27), foreground revolution leading screw seat support plate (28), simulation stub adapter sleeve (30), stub fork (31), connecting link bearing (33), stub fork support (34), foreground rotary disk (35), foreground revolution screw bearing (59), connect bearing pin (66) and central shaft (92),

Foreground rotary disk (35) be screwed be arranged on foreground base (13) left mounting plane on, for being rotationally connected between stub fork support (34) and foreground rotary disk (35), central shaft (92) inserts in the through hole on two fork walls of stub fork support (34) as being rotationally connected, stub fork (31) adopts connection bearing pin (66) and central shaft (92) to be rotationally connected, and the top of stub fork (31) is inserted for being fixedly connected with in the lower end of simulation stub (22); Vertical survey dish (23) is fixedly mounted on the upper end of simulation stub (22), simulation stub adapter sleeve (30) is sleeved on for being fixedly connected with in simulation stub (22), and the leading flank of stub fork support (34) is fixedly connected with the connecting link bearing (33) be rotationally connected with connecting link (16);

The bottom on foreground revolution leading screw seat (26) and foreground are turned round leading screw seat support plate (28) and are rotationally connected, foreground revolution leading screw seat support plate (28) is fixed on the left processing plane of foreground base (13), foreground revolution leading screw (25) is inserted in the leading screw block hole on foreground revolution leading screw seat (26) as being rotationally connected, the rear end on foreground revolution leading screw (25) is turned round leading screw handwheel (27) with foreground and is fixedly connected with, front end and foreground are turned round screw (24) and are equipped with as being threaded, screw bearing (59) is turned round for being rotationally connected in foreground revolution screw (24) and foreground, foreground revolution screw bearing (59) is fixedly connected on the bottom of the right side of stub fork support (34),

Mechanical interface in left front inspection part (14) and horizontal location part include swing arm (17), transverse axis contiguous block (18), transverse axis pull bar (21), front transverse axis (32) and zero-point positioning block (91);

The fork of swing arm (17) right-hand member is sleeved on central shaft (92) two ends for being flexibly connected, for being fixedly connected with in the through hole of right-hand member insertion swing arm (17) left end of front transverse axis (32), transverse axis contiguous block (18) is set with and is fixed on front transverse axis (32), for being fixedly connected with in the right-hand member of left end insertion front sensor chuck (101) of front transverse axis (32), the left end of transverse axis pull bar (21) adopts screw to be fixed on the trailing flank of transverse axis contiguous block (18), the right-hand member of transverse axis pull bar (21) is threaded with the trailing flank of simulation stub adapter sleeve (30), zero-point positioning block (91) is placed on the left mounting plane of foreground base (13), the top end face of zero-point positioning block (91) contacts with the bottom surface of swing arm (17) left end and connects,

Caster adjustment member in left front inspection part (14) includes reverse caster angular encoder support (36), short rocker arm| bearing (37), reverse caster angular encoder rigid support (38), reverse caster angular encoder (39), short rocker arm| (40), lower screw clutch (41), lower leading screw seat (43), lower leading screw (44), upper leading screw (45), upper screw clutch (46), upper leading screw seat (47), upper slide rail (49), stub top shoe (50), stub sliding block (51), long rocking arm (52), Kingpin inclination angular encoder rigid support (53), Kingpin inclination angular encoder (54), Kingpin inclination angular encoder support (55), long rocker arm support (56), short rocker arm| lock handle (58), glidepath (60), top shoe lock-screw (61), sliding block lock-screw (62), long rocking arm lock handle (63), upper sliding-rail sliding (64) and glidepath slide block (65),

The left side that short rocker arm| bearing (37) is fixed on foreground base (13) adds on installed surface, reverse caster angular encoder (39) is connected with screw with the upper end of reverse caster angular encoder rigid support (38), the lower end of reverse caster angular encoder rigid support (38) is fixedly connected with the right-hand member of reverse caster angular encoder support (36), the left end of reverse caster angular encoder support (36) is connected with the right-hand member screw of short rocker arm| bearing (37), the rotation axis of reverse caster angular encoder (39) inserts in two through holes of short rocker arm| bearing (37) upper end, short rocker arm| lock handle (58) inserts in the through hole before the gap on left support arm as being rotationally connected, short rocker arm| lock handle (58) inserts the threaded hole behind the gap on left support arm for being threaded simultaneously, for being fixedly connected with on the rotation axis that short rocker arm| (40) lower end is sleeved on reverse caster angular encoder (39), the through hole of right-hand member insertion short rocker arm| (40) upper end of glidepath (60) is fixedly connected with the through hole inner bolt of lower leading screw seat (43) lower end, the left end of cylindrical glidepath (60) inserts in the through hole of glidepath slide block (65), lower leading screw (44) and lower leading screw seat (43) are connected with the through hole of lower screw clutch (41) is dynamic, the left end of lower leading screw (44) is threaded with the threaded hole on glidepath slide block (65), right-hand member and the lower leading screw of lower leading screw (44) adjust knob (42) and are fixedly connected with.

9. according to according to claim 1 based on belt driven type calibrating apparatus for four-wheel positioning instrument, it is characterized in that, described rear stand check portion divides (3) to comprise background base (69), right back inspection part (70) and left back inspection part (71);

Right back inspection part (70) described in composition checks the component structural of part (71) identical with left back;

Background base (69) is a weld assembly with channel-section steel and Plate Welding, the bottom surface at background base (69) two ends and the rear right erecting bed of right vertical beam (7) rear end in prenex test jig at zero point (1) contact with the rear left erecting bed of left longeron (8) rear end and adopt register pin to be fixedly connected with screw, the two ends of background base (69) upper table surface process right mounting plane and left mounting plane, right back inspection part (70) is with on left back the right mounting plane and left mounting plane checking part (71) to be arranged on background base (69) upper table surface successively, right back inspection part (70) checks two rear cross shafts (73) in part (71) to point to right side and left side with left back, right back inspection part (70) checks the axis of rotation of two rear cross shafts (73) in part (71) to want conllinear with left back.

10. according to according to claim 9 based on belt driven type calibrating apparatus for four-wheel positioning instrument, it is characterized in that, left back described inspection part (71) checks part (70) all to comprise rear cross shaft (73) with right back, backstage stand (74), backstage elevating screw seat (76), backstage elevating screw (77), horizontal seat (78), backstage revolution leading screw seat cushion (80), backstage revolution leading screw seat (81), backstage revolution leading screw (82), level angle scrambler (83), bearing seat cushion (84), level angle scrambler rigid support (85), camber angular encoder (86), camber angular encoder rigid support (87), backstage rotary disk (89) and backstage lifting support (90),

Backstage rotary disk (89) adopts screw to be fixedly mounted on together with bearing seat cushion (84) on the left mounting plane of background base (69), backstage stand (74) adopts bearing to become to be rotationally connected with backstage rotary disk (89), level angle scrambler (83) adopts level angle scrambler rigid support (85) to be arranged on the bottom surface of background base (69), the rotation axis of level angle scrambler (83) inserts background base (69), bearing seat cushion (84) adopts screw to be fixedly connected with backstage stand (74) with backstage rotary disk (89) afterwards, the shell of camber angular encoder (86) is fixedly connected with camber angular encoder rigid support (87), the lower end of camber angular encoder rigid support (87) is fixedly mounted on the front end of backstage stand (74), in rotation axis insertion backstage stand (74) of camber angular encoder (86), two through holes of left front sway brace and left back sway brace upper end are interior for being rotationally connected, for being fixedly connected with on the rotation axis that horizontal seat (78) is sleeved on camber angular encoder (86), rear cross shaft (73) is processed into multidiameter, become to be fixedly connected with in the through hole that the left end of rear cross shaft (73) inserts horizontal seat (78) right-hand member, the left end of backstage lifting support (90) is fixedly mounted on the right side of left back sway brace in backstage stand (74), backstage elevating screw seat (76) is rotatably connected on the front end face of backstage lifting support (90) left end, backstage elevating screw (77) insert backstage elevating screw seat (76) through hole in and be threaded with horizontal seat (78), the installation shaft of revolution leading screw seat (81) lower end, backstage is inserted backstage revolution leading screw seat cushion (80) and is rotatably connected on the right mounting plane of background base (69), turn round leading screw with backstage after the left end on backstage revolution leading screw (82) inserts the through hole on backstage revolution leading screw seat (81) to adjust knob (79) and be fixedly connected with, the right-hand member on backstage revolution leading screw (82) is connected with the nose threads of backstage stand (74),

Level angle scrambler (83), camber angular encoder (86) intersect at a point with the axis of rotation of rear cross shaft (73) orthogonally.