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

Abstract

The invention discloses a kind of based on belt driven type calibrating apparatus for four-wheel positioning instrument, be intended to overcome the problem can not carrying out quality arbitration to 3D four-wheel position finder.It comprises test jig at prenex zero point, front platform inspection part, rear stand check portion are divided, right leather belt gearing and left leather belt gearing.Left leather belt gearing comprises driving pulley, front driven pulley, front sensor chuck, rear sensor chuck, rear driven pulley and belt.The long lower margin axle outer end key of the front left combined support leg that driving pulley is sleeved in toe-in test jig at zero point connects, the right-hand member of front sensor chuck is sleeved on the left end of the front transverse axis in left front inspection part and locks, the middle key that front driven pulley is sleeved on front sensor chuck connects, the right-hand member of rear sensor chuck is sleeved on the rear cross shaft left end in left back inspection part and locks, rear driven pulley is sleeved on rear sensor chuck middle key and connects, and belt is arranged in the race of driving pulley, front driven pulley and rear driven pulley.

Description

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

Technical field

The present invention relates to a kind of automotive inspection equipment for auto industry field, more particularly, it relates to a kind of based on belt driven type calibrating apparatus for four-wheel positioning instrument.

Background technology

Vehicle handling stability and roadholding are ensured by the Proper Match of vehicle wheel alignment parameter, any one misalignment of parameter just can cause automobile loss of control stability and straight-line travelling ability, accelerate tire wear, oil consumption is risen, degradation problem under security.

Four-wheel position finder is the most important checkout equipment of inspection wheel alignment parameter.The recoverable amount of current national four-wheel position finder reaches 30000 multiple stage, and the speed with annual 30% is increasing progressively, no matter but be its production run or its use procedure, be difficult at present effectively check the performance of four-wheel position finder, the accuracy of detection of four-wheel position finder itself cannot be ensured.

Four-wheel position finder has multiple function, as detected camber angle, toe-in angle, kingpin castor angle, kingpin inclination and wheel steering locking angle, wrapping angle etc.Four-wheel position finder realizes by different detection methods and sensor the detection of above-mentioned parameter, because wheel kingpin castor angle and kingpin inclination directly can not be measured by the sensor of four-wheel position finder, but by corresponding mathematical model indirect inspection, so, different four-wheel position finder accuracy of detection is tested just abnormal difficult.

At present, the verifying attachment that four-wheel position finder manufacturer uses mainly contains four kinds:

1. the fixed caliberating device in inclination angle

This device only can be tested to the accuracy of detection that four-wheel position finder measures camber angle and toe-in angle, and can not test to the precision that four-wheel position finder detects kingpin castor angle and kingpin inclination etc.

2. the verifying attachment of the four-wheel position finder of Jilin University's research and development

Chinese patent notification number is CN 1181327 B, and the day for announcing is on Dec 22nd, 2004, and the patent No. is ZL 03 1 10944.6, inventor: Su Jian.This patent completes the simulation to wheel orientation angle by a series of leverage.In use there is following problem in this device:

1) complex structure, requirement on machining accuracy is high, adds cost;

2) transmission chain length, cumulative errors is large;

3) Kingpin inclination and stub camber angle metering method are vernier metering, manufacture complicated;

4) thrust angle and steering angle can not be checked.

3. the caliberating device of the four-wheel position finder of Liaoning Province's quantitative study institute research and development

In use there is following problem in this device:

1) complex structure, requirement on machining accuracy is high, adds cost;

2) transmission chain length, cumulative errors is large;

3) kingpin castor angle can not be checked, steering angle;

4) left and right two-wheeled can not self-movement, and antero posterior axis can not self-movement;

5) stated accuracy, principle, parameter all do not meet the requirement of Ministry of Communications standard JT/T505-2004.

4. the calibrating installation of the vehicle vertically and horizontally flat non-relating angle modulation type fourth wheel orientator of Jilin University's research and development

In use there is following problem in this device:

1) equipment volume is comparatively large, after installing leveling, generally can not move.Therefore this calibrating installation is applicable to the situation of infrequently movement;

2) angular measure adopts dividing head to carry out, and data read time is longer on the one hand, adds weight and the cost of equipment on the other hand;

3) sphere guide rail structure is adopted to carry out the transmission of power, higher to sphere guide rail requirement on machining accuracy;

4) adopt antero posterior axis split-type structural, add the equipment leveling time;

5) although adopt self-centering chuck accurately to locate, the overall weight of equipment is added.

5. the calibrating installation of the explicit four-wheel position finder of monolithic devices Vehicular data of Jilin University's research and development

In use there is following problem in this device:

1) adopt arc-shaped guide rail adjustment kingpin castor angle and kingpin inclination, this arc-shaped guide rail machining precision is high, adds processing cost;

2) by feed screw nut adjustment caster angle, this sets of transmission mechanism adds weight of equipment and processing cost;

3) simulation stub lower end turns on passing through and is connected with joint spider, adds connecting link, and because this equipment requirement simulation main pin axis is by spider center, therefore assembly difficulty is larger.

6. the calibrating installation of the portable digital display vehicle four-wheel position indicator of Jilin University's research and development

In use there is following problem in this device:

1) integral device volume is large, is not easy to transport;

2) in zero point checkout procedure, sensor easily occurs that registration is unstable or without registration phenomenon, affects the calibrating quality of four-wheel position finder;

3) upper and lower slide rail locking mechanism structure is complicated, adds processing, assembly cost.

Summary of the invention

Technical matters to be solved by this invention overcomes the problem existing in prior art and can not realize carrying out the 3D four-wheel position finder of widespread use on market quality arbitration, one is provided to have simulated automotive wheel synchronous axial system and various orientation angle function, precision higher than 3D four-wheel position finder accuracy of detection, can meet national quality superintendent office and manufacturer to the quality of 3D four-wheel position finder carry out that rapid verification on the spot requires based on belt driven type calibrating apparatus for four-wheel positioning instrument.

For solving the problems of the technologies described above, the present invention adopts following technical scheme to realize: described include test jig at prenex zero point based on belt driven type calibrating apparatus for four-wheel positioning instrument, front platform inspection part, rear stand check portion divide and belt transmission.Described belt transmission includes right leather belt gearing and left leather belt gearing, and left leather belt gearing includes driving pulley, front driven pulley, front sensor chuck, rear sensor chuck, rear driven pulley and belt.

The outer end that described driving pulley is sleeved on long ground caster axle in the front left combined support leg in toe-in test jig at zero point is that key connects, the right-hand member of front sensor chuck is sleeved on the left end of the front transverse axis in left front inspection part and adopts front sensor chuck locking knob to lock, the middle that front driven pulley is sleeved on front sensor chuck is that key connects, the right-hand member of rear sensor chuck is sleeved on the left end of the rear cross shaft in left back inspection part and adopts rear sensor chuck locking knob locking, the middle that rear driven pulley is sleeved on rear sensor chuck is that key connects, belt is arranged on driving pulley, in the race of front driven pulley and rear driven pulley.

Right leather belt gearing described in technical scheme is identical with the structure of left leather belt gearing, and right leather belt gearing also includes driving pulley, front driven pulley, front sensor chuck, rear sensor chuck, rear driven pulley and belt.The outer end that described driving pulley is sleeved on long ground caster axle in the front right combined support leg in toe-in test jig at zero point is that key connects, the left end of front sensor chuck is sleeved on the right-hand member of the front transverse axis in right front inspection part and adopts front sensor chuck locking knob to lock, the middle that front driven pulley is sleeved on front sensor chuck is that key connects, the left end of rear sensor chuck is sleeved on the right-hand member of the rear cross shaft in right back inspection part and adopts rear sensor chuck locking knob locking, the middle that rear driven pulley is sleeved on rear sensor chuck is that key connects, belt is arranged on driving pulley, in the race of front driven pulley and rear driven pulley.

Test jig at prenex zero point described in technical scheme comprises front beam, rear cross beam, right vertical beam, left longeron, front right combined support leg, front left combined support leg, rear right combined support leg and rear left combined support leg.The two ends of front beam and right vertical beam are equipped with the through hole of left longeron front end and adopt nut to be fixedly connected with, the two ends of rear cross beam and right vertical beam are equipped with the through hole of left longeron rear end and adopt nut to be fixedly connected with becomes the rectangular frame of a plane, and the front right combined support leg vertically arranged, front left combined support leg, rear right combined support leg and the top end face of rear left combined support leg contact with the bottom surface at four angles of rectangular frame and adopt and be screwed.The right vertical beam that described front platform inspection part is arranged in toe-in test jig at zero point is that bolt is fixedly connected with the front end of left longeron, and rear stand check portion divides the right vertical beam be arranged in toe-in test jig at zero point to be that bolt is fixedly connected with the rear end of left longeron.

Front right combined support leg described in technical scheme and front left combined support leg all include ground castor, long ground caster axle, trundle bracket, castor connecting board, supporting leg pipe, supporting leg web joint, supporting leg adjusting screw(rod) and supporting leg base.The upper end of described supporting leg pipe is welded with supporting leg web joint, the lower end of supporting leg pipe is welded with ground castor connecting board, ground castor connecting board is connected with supporting leg adjusting screw(rod) threaded upper ends, the lower end supporting leg base of supporting leg adjusting screw(rod) is welded to connect, the axis of supporting leg adjusting screw(rod) and the plane perpendicular of supporting leg base.The top installing plate of ground trundle bracket is with bolts with ground castor connecting board, on the installing plate bottom surface, top of ground trundle bracket, 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 adopts bearing to be arranged on ground trundle bracket is interior for being rotationally connected, lower margin wheel is sleeved on for key connects in the long ground caster axle in lower margin wheel support between two vertical hold-down arms, and it is key connection that driving pulley to be sleeved in ground trundle bracket in the long ground caster axle outside vertical hold-down arm.

Supporting leg web joint described in technical scheme is the slab construction part of rectangle, supporting leg web joint is evenly arranged the slotted eye of mounting screw, and supporting leg web joint is vertical with the axis of rotation of supporting leg pipe.Described ground castor connecting board is the slab construction part of rectangle, ground castor connecting board left-half is evenly arranged 4 through holes, ground castor connecting board right half part processes a threaded hole along the centerline direction of supporting leg pipe, and ground castor connecting board is vertical with the axis of rotation of supporting leg pipe.

Rear right combined support leg described in technical scheme and rear left combined support leg are except short ground caster axle is not identical with long lower margin wheel shaft structure, other parts of rear right combined support leg and rear left combined support leg are identical with the component structural in front right combined support leg and front left combined support leg, namely rear right combined support leg and rear left combined support leg all castor, short ground caster axle, trundle bracket, castor connecting board, supporting leg pipe, supporting leg web joint, supporting leg adjusting screw(rod) and supporting leg base.Described supporting leg pipe is the bar class formation part be made up of pipe, its upper end is welded with the supporting leg web joint of the rectangle vertical with the axis of rotation of supporting leg pipe, the ground castor connecting board of the rectangle vertical with supporting leg pipe axis of rotation is welded in the lower end of supporting leg pipe, ground castor connecting board is threaded with supporting leg adjusting screw(rod) top, the lower end of supporting leg adjusting screw(rod) is welded with supporting leg base, the axis of rotation of supporting leg adjusting screw(rod) and the plane perpendicular of supporting leg base; Ground trundle bracket 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, 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 adopts bearing to be arranged in ground trundle bracket on two vertical hold-down arms is interior for being rotationally connected, and it is that key connects that lower margin wheel is sleeved in the short ground caster axle in lower margin wheel support between two vertical hold-down arms.

Front platform inspection part described in technical scheme is made up of foreground base, left front inspection part, right front inspection part and connecting link.Left front inspection part described in composition checks the component structural of part identical with right front.Foreground base is a tower structure part with shaped steel and Plate Welding, the bottom surface at base two ends, foreground and the right front erecting bed of right vertical beam contact with the left front erecting bed of left longeron and adopt register pin to be fixedly connected with bolt, the two ends of foreground base 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 and right front inspection part to be arranged on successively on left mounting plane on the base of foreground and right mounting plane and to adopt and be screwed, the axis of rotation conllinear of transverse axis before left front inspection part checks in part two structures identical with right front, before left front inspection part checks in part two structures identical with right front, transverse axis points to the left and right sides, left front inspection part is connected by connecting link with right front inspection part.

Left front inspection part described in technical scheme is all made up of level angle adjustment member, mechanical interface and horizontal location part and caster adjustment member with right front inspection part.Level angle adjustment member in left front inspection part includes simulation stub, vertical survey dish, foreground revolution screw, foreground revolution leading screw, foreground revolution leading screw seat, foreground revolution leading screw handwheel, foreground revolution leading screw seat support plate, simulation stub adapter sleeve, stub fork, connecting link bearing, stub fork support, foreground rotary disk, foreground revolution screw bearing, connects bearing pin and central shaft.Foreground rotary disk is screwed and is arranged on the left mounting plane of foreground base, for being rotationally connected between stub fork support and foreground rotary disk, central shaft inserts in the through hole on two fork walls of stub fork support as being rotationally connected, stub fork adopts connection bearing pin to be connected with central axis, and the top of stub fork is inserted for being fixedly connected with in the lower end of simulation stub.Vertical survey dish is fixedly mounted on the upper end of simulation stub, and simulation stub adapter sleeve is sleeved on for being fixedly connected with on simulation stub, and the leading flank of stub fork support is fixedly connected with the connecting link bearing be rotationally connected with connecting link; The bottom of foreground revolution leading screw seat and foreground are turned round leading screw seat support plate and are rotationally connected, foreground revolution leading screw seat support plate is fixed on the left processing plane of foreground base, foreground revolution leading screw inserts in the leading screw block hole on foreground revolution leading screw seat as being rotationally connected, the rear end of foreground revolution leading screw is turned round leading screw handwheel with foreground and is fixedly connected with, front end and foreground are turned round screw and are equipped with as being threaded, screw bearing is turned round for being rotationally connected in foreground revolution screw and foreground, and foreground revolution screw bearing is fixedly connected on the bottom of the right side of stub fork support; Mechanical interface in left front inspection part and horizontal location part include swing arm, transverse axis contiguous block, transverse axis pull bar, front transverse axis and zero-point positioning block.The fork of swing arm right-hand member is sleeved on central shaft two ends for being flexibly connected, for being fixedly connected with in the through hole of the right-hand member insertion swing arm left end of front transverse axis, transverse axis contiguous block is set with and is fixed on front transverse axis, for being fixedly connected with in the right-hand member of the left end insertion front sensor chuck of front transverse axis, the left end of transverse axis pull bar adopts screw to be fixed on the trailing flank of transverse axis contiguous block, the right-hand member of transverse axis pull bar is threaded with the trailing flank of simulation stub adapter sleeve, zero-point positioning block is placed on the left mounting plane of foreground base, and the top end face of zero-point positioning block contacts with the bottom surface of swing arm left end and connects, caster adjustment member in left front inspection part includes reverse caster angular encoder support, short rocker arm| bearing, reverse caster angular encoder rigid support, reverse caster angular encoder, short rocker arm|, lower screw clutch), lower leading screw seat, lower leading screw, upper leading screw, upper screw clutch, upper leading screw seat, upper slide rail, stub top shoe, stub sliding block, long rocking arm, Kingpin inclination angular encoder rigid support, Kingpin inclination angular encoder, Kingpin inclination angular encoder support, long rocker arm support, short rocker arm| lock handle, glidepath, top shoe lock-screw, sliding block lock-screw, long rocking arm lock handle, upper sliding-rail sliding and glidepath slide block.The left side that short rocker arm| bearing is fixed on foreground base adds on installed surface, reverse caster angular encoder is connected with screw with the upper end of reverse caster angular encoder rigid support, the lower end of reverse caster angular encoder rigid support is fixedly connected with the right-hand member of reverse caster angular encoder support, the left end of reverse caster angular encoder support is connected with the right-hand member screw of short rocker arm| bearing, the rotation axis of reverse caster angular encoder inserts in two through holes of short rocker arm| bearing upper end, short rocker arm| lock handle inserts in the through hole before the gap on left support arm as being rotationally connected, threaded hole after short rocker arm| lock handle inserts the gap on left support arm is simultaneously for being threaded, for being fixedly connected with on the rotation axis that short rocker arm| lower end is sleeved on reverse caster angular encoder, the through hole of the right-hand member insertion short rocker arm| upper end of glidepath is fixedly connected with the through hole inner bolt of lower leading screw seat lower end, the left end of cylindrical glidepath inserts in the through hole of glidepath slide block, the through hole of lower leading screw and lower leading screw seat and lower screw clutch is dynamic to be connected, the left end of lower leading screw is threaded with the threaded hole on glidepath slide block, the right-hand member of lower leading screw adjusts knob with lower leading screw and is fixedly connected with.

Rear stand check portion described in technical scheme is divided and is comprised background base, right back inspection part and left back inspection part.Right back inspection part described in composition checks the component structural of part identical with left back.Background base is a weld assembly with channel-section steel and Plate Welding, the bottom surface at background base two ends and the rear right erecting bed of the right vertical beam rear end in toe-in test jig at zero point contact with the rear left erecting bed of left longeron rear end and adopt register pin to be fixedly connected with screw, the two ends of background base upper table surface process right mounting plane and left mounting plane, on the right mounting plane that right back inspection part and left back inspection part are arranged on background base upper table surface successively and left mounting plane, right back inspection part checks two rear cross shafts in part to point to right side and left side with left back, right back inspection part wants conllinear with the axis of rotation of two rear cross shafts in left back inspection part.

Left back inspection part described in technical scheme and right back inspection part all comprise rear cross shaft, backstage stand, backstage elevating screw seat, backstage elevating screw, horizontal seat, leading screw seat cushion is turned round on backstage, leading screw seat is turned round on backstage, leading screw is turned round on backstage, level angle scrambler, bearing seat cushion, level angle scrambler rigid support, camber angular encoder, camber angular encoder rigid support, backstage rotary disk and backstage lifting support.Backstage rotary disk adopts screw to be fixedly mounted on together with bearing seat cushion on the left mounting plane of background base, backstage stand adopts bearing to become to be rotationally connected with backstage rotary disk, level angle scrambler adopts level angle scrambler rigid support to be arranged on the bottom surface of background base, the rotation axis of level angle scrambler inserts background base, bearing seat cushion adopts screw to be fixedly connected with after the rotary disk of backstage with backstage stand, the shell of camber angular encoder is fixedly connected with camber angular encoder rigid support, the lower end of camber angular encoder rigid support is fixedly mounted on the front end of backstage stand, in the rotation axis insertion backstage stand of camber angular encoder, 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 cover for seat is contained in camber angular encoder, rear cross shaft is processed into multidiameter, become to be fixedly connected with in the through hole that the left end of rear cross shaft inserts horizontal seat right-hand member, the left end of backstage lifting support is fixedly mounted on the right side of left back sway brace in the stand of backstage, backstage elevating screw seat is rotatably connected on the front end face of backstage lifting support left end, backstage elevating screw to insert in the through hole of backstage elevating screw seat and is threaded with horizontal seat, the installation shaft of revolution leading screw seat lower end, backstage is inserted backstage revolution leading screw seat cushion and is rotatably connected on the right mounting plane of background base, turn round leading screw after the left end of backstage revolution leading screw inserts the through hole of backstage revolution leading screw seat to adjust knob be fixedly connected with backstage, the right-hand member of backstage revolution leading screw is connected with the nose threads of backstage stand.The axis of rotation of level angle scrambler, camber angular encoder and rear cross shaft intersects at a point orthogonally.

Compared with prior art the invention has the beneficial effects as follows:

1. of the present invention is improve on the basis of original split reassembling type vehicle four-wheel position finder calibrating installation based on belt driven type calibrating apparatus for four-wheel positioning instrument, adopt combined support leg structure, both can static work on the table based on belt driven type calibrating apparatus for four-wheel positioning instrument, can work movably forward and backward on the table again.

2. of the present inventionly add belt synchronous transmission device based on belt driven type calibrating apparatus for four-wheel positioning instrument, achieve be labeled as 101 front sensor chuck and be labeled as the rear sensor chuck of 103 and be labeled as the ground castor synchronous axial system of 4, thus achieve the calibrating to 3D four-wheel position finder.

Accompanying drawing explanation

Below in conjunction with accompanying drawing, the present invention is further illustrated:

Fig. 1 is the axonometric projection graph based on belt driven type calibrating apparatus for four-wheel positioning instrument structure composition of the present invention;

Fig. 2 is of the present invention based on the prenex axonometric projection graph that zero point, test jig structure formed in belt driven type calibrating apparatus for four-wheel positioning instrument;

Fig. 3 axonometric projection graph based on combined support leg structure composition before in belt driven type calibrating apparatus for four-wheel positioning instrument of the present invention;

Fig. 4 is the axonometric projection graph based on the rear combined support leg structure composition in belt driven type calibrating apparatus for four-wheel positioning instrument of the present invention;

Fig. 5 is the axonometric projection graph based on the front platform inspection part in belt driven type calibrating apparatus for four-wheel positioning instrument of the present invention;

Fig. 6 is the axonometric projection graph based on level angle adjustment member in the front platform inspection part in belt driven type calibrating apparatus for four-wheel positioning instrument of the present invention;

Fig. 7 is the axonometric projection graph based on left front inspection part in the front platform inspection part in belt driven type calibrating apparatus for four-wheel positioning instrument of the present invention;

Fig. 8 is of the present invention based on the axonometric projection graph after left front inspection part rotation 180 degree in the front platform inspection part in belt driven type calibrating apparatus for four-wheel positioning instrument;

Fig. 9 is the axonometric projection graph divided based on the rear stand check portion in belt driven type calibrating apparatus for four-wheel positioning instrument of the present invention;

Figure 10 be of the present invention divide based on the rear stand check portion in belt driven type calibrating apparatus for four-wheel positioning instrument in the axonometric projection graph of right back inspection part;

Figure 11 be of the present invention divide based on the rear stand check portion in belt driven type calibrating apparatus for four-wheel positioning instrument in right back inspection part rotate the axonometric projection graph after 180 degree;

Figure 12 is the axonometric projection graph based on the left leather belt transmission structures composition in belt driven type calibrating apparatus for four-wheel positioning instrument of the present invention;

In figure: 1. toe-in test jig at zero point, 2. front platform inspection part, 3. after, stand check portion is divided, 4. castor, 5. front beam, 6. rear cross beam, 7. right vertical beam, 8. left longeron, 9. front right combined support leg, 10. front left combined support leg, 11. rear right combined support legs, 12. rear left combined support legs, 13. foreground bases, 14. left front inspection parts, 15. right front inspection parts, 16. connecting links, 17. swing arms, 18. transverse axis contiguous blocks, 19. right leather belt gearings, 20. left leather belt gearings, 21. transverse axis pull bars, 22. simulation stubs, 23. vertical survey dishes, 24. foreground revolution screws, 25. foreground revolution leading screws, 26. foreground revolution leading screw seats, 27. foreground revolution leading screw handwheels, 28. foreground revolution leading screw seat support plates, 29. lock-screws, 30. simulation stub adapter sleeves, 31. stub forks, transverse axis before 32., 33. connecting link bearings, 34. stub fork supports, 35. foreground rotary disks, 36. reverse caster angular encoder supports, 37. short rocker arm| bearings, 38. reverse caster angular encoder rigid supports, 39. reverse caster angular encoders, 40. short rocker arm|s, 41. times screw clutchs, 42. times leading screw adjustment knobs, 43. times leading screw seats, 44. times leading screws, leading screw on 45., screw clutch on 46., leading screw seat on 47., leading screw adjustment knob on 48., slide rail on 49., 50. stub top shoes, 51. stub sliding blocks, 52. long rocking arms, 53. Kingpin inclination angular encoder rigid supports, 54. Kingpin inclination angular encoders, 55. Kingpin inclination angular encoder supports, 56. long rocker arm supports, 57. foreground rotary disk pointers, 58. short rocker arm| lock handles, 59. foreground revolution screw bearings, 60. glidepaths, 61. top shoe lock-screws, 62. sliding block lock-screws, 63. long rocking arm lock handles, sliding-rail sliding on 64., 65. glidepath slide blocks, 66. connect bearing pin, 67. central shaft set nuts, 68. long ground caster axle, 69. background bases, 70. right back inspection parts, 71. left back inspection parts, 72. short ground caster axle, 73. rear cross shafts, 74. backstage stands, 75. backstage elevating screw adjustment knobs, 76. backstage elevating screw seats, 77. backstage elevating screws, 78. horizontal seats, 79. backstage revolution leading screw adjustment knobs, 80. backstage revolution leading screw seat cushions, 81. backstage revolution leading screw seats, 82. backstage revolution leading screws, 83. level angle scramblers, 84. bearing seat cushions, 85. background base web joints, 86. camber angular encoders, 87. camber angular encoder rigid supports, 88. backstage rotary disk pointers, 89. backstage rotary disks, 90. backstage lifting supports, 91. zero-point positioning blocks, 92. central shafts, 93. driving pulleys, 94. ground trundle brackets, 95. ground castor connecting boards, 96. supporting leg pipes, 97. supporting leg web joints, 98. supporting leg adjusting screw(rod)s, 99. supporting leg bases, driven pulley before 100., 101. front sensor chucks, 102. front sensor chuck locking knobs, sensor chuck after 103., sensor chuck locking knob after 104., driven pulley after 105., 106. belt.

Embodiment

Below in conjunction with accompanying drawing, the present invention is explained in detail:

Consult Fig. 1, of the present invention based on belt driven type calibrating apparatus for four-wheel positioning instrument primarily of prenex zero point test jig 1, front platform inspection part 2, rear stand check portion divide 3 and belt transmission (comprising right leather belt gearing 19 and left leather belt gearing 20) form.Toe-in test jig at zero point 1 divides the installation matrix of 3 as front platform inspection part 2 and rear stand check portion, completes the inspection at the prenex zero point to four-wheel position finder; Front platform inspection part 2 is arranged on right vertical beam 7 in test jig 1 at prenex zero point and adopts bolt to be fixedly connected with on the front erecting bed of left longeron 8, completes the inspection to four-wheel position finder caster degree, Kingpin inclination angle, toe-in angle, camber angle and wheel steering angle parameter; Rear stand check portion divides 3 to be arranged on right vertical beam 7 in test jig 1 at prenex zero point to adopt bolt to be fixedly connected with on the rear erecting bed of left longeron 8, complete the inspection of the real wheel toe angle to four-wheel position finder, camber angle, wheel steering angle parameter; Right leather belt gearing 19 respectively by front sensor chuck 101 and rear sensor chuck 103 with on the right side of device before transverse axis 32 and rear cross shaft 73 adopt to lock and be connected, left leather belt gearing 20 respectively by front sensor chuck 101 and rear sensor chuck 103 with on the left of device before transverse axis 32 and rear cross shaft 73 adopt to lock and be connected.

Consult Fig. 2, described prenex zero point, test jig 1 formed with rear left combined support leg 12 primarily of 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.

Described front beam 5 and rear cross beam 6 are the bar class formation part that structure is identical.Front beam 5 is the front intermediate beam and rear intermediate beam be made up of pipe with the interlude of rear cross beam 6, two ends are the left and right multidiameter that structure is identical, and adopt welding manner to be fixedly connected with, namely before, the two ends of intermediate beam are welded with front left multidiameter and front right multidiameter, the axis of rotation conllinear of front left multidiameter, front intermediate beam and front right multidiameter; The two ends of rear intermediate beam are welded with rear left multidiameter and rear right multidiameter, the axis of rotation conllinear of rear left multidiameter, rear intermediate beam and rear right multidiameter.Front left multidiameter, front right multidiameter, rear left multidiameter are identical with the structure of rear right multidiameter, front left multidiameter, front right multidiameter, rear left multidiameter and rear right multidiameter are all made up of the major diameter axle of axis of rotation conllinear and minor diameter optical axis, one (outward) end of major diameter axle is the threaded thread end of processing, major diameter axle adopts nut to be fixedly connected with the thread end of major diameter axle after being equipped with the through hole of left longeron 8 front and back end with right vertical beam 7 again, and the other end of major diameter axle is the link be connected with rear intermediate beam two ends with front intermediate beam.The thread end of the major diameter axle of front left multidiameter, front right multidiameter, rear left multidiameter and rear right multidiameter and one end of minor diameter optical axis link into an integrated entity.

Described right vertical beam 7 and left longeron 8 are bar class formation parts that the structure be made up of square tube is identical.The upper workplace of right vertical beam 7 front end and rear end be welded with respectively install front platform check the right front erecting bed of part 2 and install after stand check portion divide 3 right back erecting bed, the upper workplace of left longeron 8 front end and rear end is welded with respectively to be installed front platform and check the left front erecting bed of part 2 and the rear stand check portion of installation to divide the left back erecting bed of 3; The front end of right vertical beam 7 and rear end are flatly provided with the front right through hole and rear right through hole of installing front right multidiameter and rear right multidiameter, and the front end of left longeron 8 and rear end are flatly provided with the front left through hole and rear left through hole of installing front left multidiameter and rear left multidiameter.The lateral vertical at the front right through hole on right vertical beam 7 and the axis of rotation of rear right through hole and front right through hole and rear right through hole place, the lateral vertical at the front left through hole on left longeron 8 and the axis of rotation of rear left through hole and front left through hole and rear left through hole place, and the right hole of front right through hole on right vertical beam 7 and rear right through hole apart from the left hole of the front left through hole on left longeron 8 and rear left through hole apart from equal.

Front left major diameter axle in the front left multidiameter at front beam 5 two ends and front right multidiameter and front right major diameter axle and left longeron 8 are equipped with front right through hole with the front left through hole of right vertical beam 7 front end, and employing front left nut is equipped with screw thread with the front left major diameter axle in front right multidiameter with front right major diameter axle with front left multidiameter with front right nut and is fixedly connected with; Rear left major diameter axle in the rear left multidiameter at rear cross beam 6 two ends and rear right multidiameter and rear right major diameter axle and left longeron 8 equipped with rear right through hole with the rear left through hole of right vertical beam 7 rear end, adopt rear left nut to be equipped with screw thread with the rear left major diameter axle in rear right multidiameter with rear right major diameter axle with rear left multidiameter with rear right nut to be fixedly connected with, the rectangle rack of a composition horizontal positioned.

Consult Fig. 3, described front combined support leg comprises front right combined support leg 9 and front left combined support leg 10, the two structure is identical, front right combined support leg 9 and front left combined support leg 10 all include ground castor 4, long ground caster axle 68, driving pulley 93, 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.

Described supporting leg pipe 96 is the bar class formation parts be made up of pipe, and the supporting leg web joint 97 of the rectangle that the welding of its upper end is vertical with supporting leg pipe 96 axis of rotation, supporting leg web joint 97 is evenly arranged the slotted eye of mounting screw; The lower end of supporting leg pipe 96 is welded with the ground castor connecting board 95 of the rectangle vertical with supporting leg pipe 96 axis of rotation, and 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, be 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, and the axis of supporting leg adjusting screw(rod) 98 is vertical with the bottom end face of supporting leg base 99.Rotary support leg base 99 can regulate the height of front right combined support leg 9 and front left combined support leg 10.Ground trundle bracket 94 is 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 long ground caster axle 68 adopts bearing to be arranged on ground trundle bracket 94 is interior for being rotationally connected, ground castor 4 is sleeved in the long ground caster axle 68 in ground trundle bracket 94 between two vertical hold-down arms as key connects, it is that key connects that driving pulley 93 is sleeved in the long ground caster axle 68 in ground trundle bracket 94 outside vertical hold-down arm.

Consult Fig. 4, described rear combined support leg comprises rear right combined support leg 11 and rear left combined support leg 12, the two structure is identical, 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, 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 parts of front left combined support leg 10, namely rear right combined support leg 11 and rear left combined support leg 12 all include ground castor 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 parts be made up of pipe, and the supporting leg web joint 97 of the rectangle that the welding of its upper end is vertical with supporting leg pipe 96 axis of rotation, supporting leg web joint 97 is evenly arranged the slotted eye of mounting screw; 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 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, be 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, and the axis of supporting leg adjusting screw(rod) 98 is vertical with the bottom end face of supporting leg base 99.Rotary support leg base 99 can regulate the height of rear right combined support leg 11 and rear left combined support leg 12.Ground trundle bracket 94 is 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, and it is that key connects that ground castor 4 is sleeved in the short ground caster axle 72 in ground trundle bracket 94 between two vertical hold-down arms.

Described front right combined support leg 9, front left combined support leg 10, rear right combined support leg 11 are all arranged on vertically on the bottom surface at corner place of rectangle rack by supporting leg web joint 97 with rear left combined support leg 12, and are screwed connection.Rotation front right combined support leg 9, front left combined support leg 10, rear right combined support leg 11 are unsettled with supporting leg base 99 to four the ground castor 4 of rear left combined support leg 12 bottom, the height at rectangle rack four angles can be regulated, make toe-in test jig at zero point 1 be in horizontality, make to be still on worktable based on belt driven type calibrating apparatus for four-wheel positioning instrument to work; Rotation front right combined support leg 9, front left combined support leg 10, rear right combined support leg 11 are unsettled with supporting leg base 99 to four supporting leg bases 99 of rear left combined support leg 12 bottom, four ground castors 4 are landed, can make based on the movable work on the table of belt driven type calibrating apparatus for four-wheel positioning instrument.

Consult Fig. 5, front platform inspection part 2 forms primarily of foreground base 13, left front inspection part 14, right front inspection part 15 and connecting link 16.

Foreground base 13 is the tower structure parts with shaped steel and Plate Welding, and the two ends, left and right of foreground base 13 upper table surface process left and right mounting plane, left and right mounting plane process through hole and T-slot.Foreground base 13 is arranged on the front erecting bed of toe-in test jig at zero point 1, is namely arranged on the left front erecting bed of left longeron 8 front end and the right front erecting bed of right vertical beam 7 front end, adopts register pin location and screw to fix.The left and right mounting plane of foreground base 13 upper table surface is provided with left front inspection part 14 and right front inspection part 15 successively, left front that has assembled is arranged on the left and right mounting plane of foreground base 13 upper table surface with checking part 14 and right front inspection part 15 specular, checks the axis of rotation of the front transverse axis 32 of two sensor chucks in part 14 and right front inspection part 15 to want conllinear for left front.

Left front inspection part 14 in front platform inspection part 2 is connected by connecting link 16 with right front inspection part 15, form left front inspection part 14 identical with the design of part of right front inspection part 15, left front inspection part 14 and right front inspection part 15 are all made up of level angle adjustment member, mechanical interface and horizontal location part and caster adjustment member.

Left front inspection part 14 in front platform inspection part 2:

1. consult Fig. 6 to Fig. 8, level angle adjustment member 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, lock-screw 29, simulation stub adapter sleeve 30, stub fork 31, connecting link bearing 33, stub fork support 34, foreground rotary disk 35, foreground rotary disk pointer 57, foreground revolution screw bearing 59, connects bearing pin 66, central shaft 92.

Foreground rotary disk 35 is screwed on the left mounting plane that is arranged in foreground base 13 upper table surface, the bottom face of stub fork support 34 contacts with the top end face of foreground rotary disk 35 and connects, stub fork support 34 becomes to be rotationally connected with adopting bearing (with vertical bearing pin) between 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, the centre position of the central shaft 92 between stub fork support 34 liang of fork walls diametrically processes a radial direction through hole, stub fork 31 (two yokes) by this radial direction through hole be connected bearing pin 66 and central shaft 92 is rotationally connected, stub fork 31 is pitched between support 34 with stub and is become being rotationally connected of both direction.Simulation stub 22 1 (under) end inserts in the top through hole of stub fork 31 to become to be fixedly connected with; Another (on) the upper vertical survey dish 23 (the upper plane of vertical survey dish 23 and the axes normal of simulation stub) of end fixed installation.Simulation stub adapter sleeve 30 is fixedly set on simulation stub 22, and lock-screw 29 is threaded with the trailing flank of simulation stub adapter sleeve 30.Bottom (below the through hole on two fork walls) one (afterwards) side of stub fork support 34 is screwed and is connected with foreground rotary disk pointer 57, the scale on pointed foreground rotary disk 35; Another (front) side adopts screw to be fixedly connected with connecting link bearing 33, the left end of connecting link 16 adopts bearing (with bearing bearing pin) to be rotationally connected with connecting link bearing 33 one-tenth, the right-hand member of connecting link 16 adopts the identical bearing (with bearing bearing pin) of structure to check the identical connecting link bearing 33 one-tenth of structure in part 15 to be rotationally connected with right front, and namely connecting link 16 is connected to left front inspection part 14 and checks part 15 with right front.

The bottom of 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 mounting plane in foreground base 13 upper table surface, foreground revolution leading screw 25 to insert in the leading screw block hole on foreground revolution leading screw seat 26 and becomes to be rotationally connected by means of bearing, revolution leading screw 25 in foreground turns round leading screw handwheel 27 from the external part (namely turning round the rear end of leading screw 25) of foreground revolution leading screw seat 26 leading screw block hole with foreground and is fixedly connected with, and another (front) end turns round screw 24 with foreground and is equipped with as being threaded.Foreground revolution screw 24 turns round screw bearing 59 with foreground and is rotationally connected, foreground revolution screw bearing 59 is screwed the bottom of the side parallel with the through-bore axis that two pitch on wall be connected on stub fork support 34, is namely fixed on the bottom of the right side of stub fork support 34.

2. consult Fig. 6 and Fig. 7, mechanical interface and horizontal location part form primarily of swing arm 17, transverse axis contiguous block 18, transverse axis pull bar 21, front transverse axis 32, central shaft set nut 67 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 rotationally connected, adopt central shaft set nut 67 in one (afterwards) end locking of central shaft 92, front transverse axis 32 is processed into multidiameter, become to be fixedly connected with in the through hole of one (right side) end insertion swing arm 17 left end of front transverse axis 32, transverse axis contiguous block 18 suit is fixed on front transverse axis 32.Transverse axis pull bar 21 is processed into bending sheet structure, one (left side) end is screwed on transverse axis contiguous block 18 1 (afterwards) side, and lock-screw 29 is connected with simulation stub adapter sleeve 30 1 (afterwards) flank threads through the long arc shape through hole on another (right side) end of transverse axis pull bar 21.The lower horizontal of zero-point positioning block 91 is placed on the left mounting plane of foreground base 13, and the top end face of zero-point positioning block 91 contacts with the bottom surface of swing arm 17 left end and connects, and front transverse axis 32 can be made to be in horizontality.

3. consult Fig. 7 and Fig. 8, caster adjustment member is primarily of 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 adjustment knob 42, lower leading screw seat 43, lower leading screw 44, upper leading screw 45, upper screw clutch 46, upper leading screw seat 47, upper leading screw adjustment knob 48, upper slide rail 49, stub top shoe 50, stub sliding block 51, long Rocker 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 form.

Short rocker arm| bearing 37 is forked members, and its lower end is the mounting base of a rectangle, mounting base arranges the sway brace that two upper ends are processed with the through hole of the horizontal conllinear of axis of rotation, is namely provided with left support arm and right support arm.The mounting base of short rocker arm| bearing 37 lower end is screwed on the left mounting plane of foreground base 13, the housing of reverse caster angular encoder 39 and reverse caster angular encoder rigid support 38 one (on) hold to be screwed and be connected, reverse caster angular encoder rigid support 38 another (under) end be fixedly connected with the right-hand member of reverse caster angular encoder support 36, another (left side) end of reverse caster angular encoder support 36 adopts screw to be fixedly connected with the right-hand member 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, the top hole wall of left support arm through hole processes an aperture slots, left support arm processes through hole perpendicular on the direction of aperture slots on front side of gap, thread mill drilling on rear side of gap, short rocker arm| lock handle 58 front end is processed with screw thread, short rocker arm| lock handle 58 inserts in the through hole on left support arm before gap as being rotationally connected, and be threaded with the threaded hole behind gap, turn short rocker arm| lock handle 58 can lock the rotation axis of reverse caster angular encoder 39.Short rocker arm| 40 one (under) end be sleeved on reverse caster angular encoder 39 by the through hole on it rotation axis on become to be fixedly connected with, the left and right sides of short rocker arm| 40 and two medial surfaces of two sway braces of short rocker arm| bearing 37 are that face contacts and connects, and can relatively rotate.Glidepath 60 is the optical axis components being processed with the shaft shoulder, the right-hand member (end face position of center line is processed with threaded hole) of glidepath 60 insert short rocker arm| 40 another (on) in the through hole of the through hole held and lower leading screw seat 43 lower end, be fixedly connected with by screw again, another (left side) of cylindrical glidepath 60 end 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, one (left side) end of lower leading screw 44 is threaded with the threaded hole on glidepath slide block 65, another (right side) end of lower leading screw 44 adjusts knob 42 with lower leading screw and is fixedly connected with.

Long rocker arm support 56 is forked members, and its lower end is a rectangular mounting base, rectangular mounting base arranges the sway brace that two upper ends are processed with the through hole of the horizontal conllinear of axis of rotation, is namely provided with front support arm and rear support arm.Long rocker arm support 56 adopts screw to be fixed on the left mounting plane of foreground base 13 by its mounting base, namely be arranged on the left mounting plane of short rocker arm| bearing 37 left front, the housing of Kingpin inclination angular encoder 54 and Kingpin inclination angular encoder rigid support 53 one (on) hold and adopt screw to be fixedly connected with, Kingpin inclination angular encoder rigid support 53 another (under) one end is fixedly connected with the front end of Kingpin inclination angular encoder support 55, another (afterwards) end of Kingpin inclination angular encoder support 55 adopts screw to be fixedly connected with the front support arm of long rocker arm support 56, the rotation axis of Kingpin inclination angular encoder 54 inserts in two through holes of front support arm and rear support arm upper end in rocker arm support 56, the top hole wall of rear support arm through hole processes an aperture slots, through hole is processed with perpendicular on the right side of the gap of aperture slots at rear support arm, threaded hole is processed with on the left of gap, the horizontal conllinear of axis of rotation of through hole and threaded hole, long rocking arm lock handle 63 front end is processed with screw thread, long rocking arm lock handle 63 inserts in the through hole on the right side of gap, rear support arm upper end as being rotationally connected, and be threaded with the threaded hole on the left of gap, the long rocking arm lock handle 63 of turn can lock the rotation axis of Kingpin inclination angular encoder 54.Long Rocker arm 52 one (under) through hole held be sleeved on the Kingpin inclination angular encoder 54 in long rocker arm support 56 between front support arm with rear support arm rotation axis on become to be fixedly connected with, two sides and front support arm in long rocker arm support 56 and two medial surfaces of rear support arm of long Rocker arm 52 are that face contacts and is connected, and can relatively rotate.Upper slide rail 49 is the optical axis components being processed with the shaft shoulder, the front end (end face position of center line is processed with threaded hole) of upper slide rail 49 insert long Rocker arm 52 another (on) through hole of the through hole held and upper leading screw seat 47 lower end, be fixedly connected with by screw, in the through hole of the upper sliding-rail sliding 64 of another (afterwards) of cylindrical upper slide rail 49 end insertion, the through hole of upper leading screw 45 and upper leading screw seat 47 and upper screw clutch 46 is dynamic to be connected, one (afterwards) end of upper leading screw 45 is threaded with the threaded hole on upper sliding-rail sliding 64, another (front) end adjusts knob 48 with upper leading screw and is fixedly connected with.

To reach after installation the axis of reverse caster angular encoder 39 rotation axis, the axis of Kingpin inclination angular encoder 54 rotation axis, foreground rotary disk 35 orthogonal central shaft 92 axis that intersects at of axis of rotation with on the intersection point being connected bearing pin 66 axis, the axis of front transverse axis 32 and the axis collinear of reverse caster angular encoder 39 rotation axis, the simulation axis of stub 22 and the axis of rotation conllinear of foreground rotary disk 35.

Level angle adjustment member in left front inspection part 14 is fixed on the left mounting plane of foreground base 13 upper table surface, the kingpin inclination adjustment member of caster adjustment member is fixed on the upper table surface of axis direction foreground base 13 of centrally axle 92, namely revolution leading screw handwheel 27 place, foreground is stood in when overlooking calibrating installation, centered by level angle adjustment member, kingpin inclination adjustment member is above level angle adjustment member.Kingpin castor angle adjustment member is fixed on and becomes on the upper table surface of vertical direction foreground base 13 with central shaft 92 axis, and namely kingpin inclination adjustment member is in the left of level angle adjustment member.The line of centres of level angle adjustment member and kingpin inclination adjustment member and the line of centres angle of level angle adjustment member and kingpin castor angle adjustment member are right angle.Mechanical interface and horizontal adjustment part are arranged on the right of level angle adjustment member, with kingpin castor angle adjustment member on one wire.

Consult Fig. 9, rear stand check portion divides 3 to form primarily of background base 69, right back inspection part 70 and left back inspection part 71.

Background base 69 is the weld assemblies with channel-section steel and Plate Welding, and its upper table surface two ends will process mounting plane and through hole, and namely the upper table surface of background base 69 processes left mounting plane and right mounting plane.Background base 69 is arranged on the rear erecting bed of toe-in test jig at zero point 1, is namely arranged on the rear left erecting bed of left longeron 8 rear end and the rear right erecting bed of right vertical beam 7 rear end, fixes with register pin location and screw.Left back inspection part 71 and right back inspection part 70 are installed in the two ends of background base 69 upper table surface, exactly, on left back the left mounting plane and right mounting plane being arranged on background base 69 upper table surface with checking part 71 and right back inspection part 70 specular, two rear cross shafts 73 in left back inspection part 71 and right back inspection part 70 point to left side and right side, and the axis of two rear cross shafts 73 in left back inspection part 71 and right back inspection part 70 wants conllinear.

Right back inspection part 70 in rear stand check portion 3:

Consult Figure 10 and Figure 11, forming left back inspection part 71 checks the design of part of part 70 identical with right back, part 71 is checked to be arranged on the two ends of background base 69 with checking part 70 specular with right back for left back, left back inspection part 71 checks part 70 by rear cross shaft 73 with right back, backstage stand 74, backstage elevating screw adjustment knob 75, backstage elevating screw seat 76, backstage elevating screw 77, horizontal seat 78, backstage revolution leading screw adjustment knob 79, 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 pointer 88, backstage rotary disk 89 and backstage lifting support 90 form.

Backstage rotary disk 89 screw is fixedly mounted on the left back mounting plane of background base 69 through bearing seat cushion 84, backstage stand 74 adopts bearing (with vertical bearing pin) to be rotationally connected with backstage rotary disk 89 one-tenth, level angle scrambler 83 is arranged on the bottom surface of background base 69, the shell of level angle scrambler 83 is fixedly connected with level angle scrambler rigid support 85, level angle scrambler rigid support 85 is fixedly mounted on the bottom surface of background base 69, the rotation axis of level angle scrambler 83 inserts background base 69, bearing seat cushion 84 becomes to be fixedly connected with by screw with backstage stand 74 with after backstage rotary disk 89, backstage stand 74 is forked members, its lower end is a platform, platform is made the sway brace that two upper ends are processed with the through hole of the axis of rotation conllinear of level, namely left front sway brace and left back sway brace is provided with.The shell of camber angular encoder 86 is fixedly connected with the upper end of camber angular encoder rigid support 87, the lower end of camber angular encoder rigid support 87 is fixedly mounted on one (front) end of platform in backstage stand 74, the rotation axis of camber angular encoder 86 adopts left front sway brace in bearing loading backstage stand 74 to become to be rotationally connected with the through hole of two on left back sway brace, the rotation axis that horizontal seat 78 is sleeved on camber angular encoder 86 becomes to be fixedly connected with, its both sides (side, front and back) face and two sway brace two medial surfaces of backstage stand 74 are that face contacts and connects, can relatively rotate.Rear cross shaft 73 is processed into multidiameter, becomes to be fixedly connected with in the through hole of horizontal seat 78 left end of one (right side) end insertion of rear cross shaft 73.Backstage lifting support 90 one-tenth Z-types, one (left side) end of backstage lifting support 90 is fixedly mounted on one (right side) side of the left back sway brace of backstage stand 74, on the front end face that another (right side) that backstage elevating screw seat 76 is rotatably connected on backstage lifting support 90 holds, backstage elevating screw 77 to insert in the through hole of backstage elevating screw seat 76 and is threaded with the horizontal seat 78 below backstage elevating screw seat 76, and upper end and the backstage elevating screw of backstage elevating screw 77 adjust knob 75 and be fixedly connected with.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 left back mounting plane of background base 69 upper table surface, one (left side) end of backstage revolution leading screw 82 inserts and turns round leading screw with backstage after the through hole of leading screw seat 81 is turned round on backstage and adjust knob 79 and be fixedly connected with, another (right side) end of backstage revolution leading screw 82 is connected with the nose threads of backstage stand 74, will be up to the standard after installation the axis of angle-position encoder 83 rotation axis, the axis of camber angular encoder 86 rotation axis, the axis of rotation of rear cross shaft 73 is orthogonal and intersect at a point.

Consult Figure 12, described belt transmission comprises left leather belt gearing 20 and right leather belt gearing 19, and composition left leather belt gearing 20 is identical with the design of part of right leather belt gearing 19.Left leather belt gearing 20 forms primarily of driving pulley 93, front driven pulley 100, the front sensor chuck locking knob 102 that front sensor chuck 101,2 structures are identical, rear sensor chuck locking knob 104, rear driven pulley 105 and belt 106 that rear sensor chuck 103,2 structures are identical.

Described driving pulley 93 is held with long ground caster axle 68 another (outward) and is adopted key to be fixedly connected with.

Described front sensor chuck 101 is sleeve-like configuration parts, and one side bus processes two threaded holes, and the middle position that front driven pulley 100 is sleeved on front sensor chuck 101 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, rotate right side front sensor chuck locking knob 102 to be fixedly connected with the right-hand member of front sensor chuck 101 by the left end of front transverse axis 32, right side front sensor chuck locking knob 102 is threaded with front sensor chuck 101.The installation shaft of front sensor inserts the left end of front sensor chuck 101, rotate left side front sensor chuck locking knob 102 to be fixedly connected with by the left end of the installation shaft of front sensor with front sensor chuck 101, left side front sensor chuck locking knob 102 is threaded with front sensor chuck 101.

Described rear sensor chuck 103 is sleeve-like configuration parts, and one side bus processes two threaded holes, and rear driven pulley 105 adopts key to be fixedly connected with rear sensor chuck 103, is positioned at the centre position of rear sensor chuck 103.The left end of the rear cross shaft 73 in left back inspection part 71 inserts the right-hand member of rear sensor chuck 103, after rotating right side, the right-hand member of the left end of rear cross shaft 73 with rear sensor chuck 103 is fixedly connected with by sensor chuck locking knob 104, and behind right side, sensor chuck locking knob 104 is threaded with rear sensor chuck 103.The installation shaft of rear sensor inserts the left end of rear sensor chuck 103, after rotating left side, the left end of the installation shaft of rear sensor with rear sensor chuck 103 is fixedly connected with by sensor chuck locking knob 104, and behind left side, sensor chuck locking knob 104 is threaded with rear sensor chuck 103.

Described belt 106 is arranged on in the race of driving pulley 93, front driven pulley 100, rear driven pulley 105.

When requiring that thrust unit moves forward and backward after installation, ground castor 4 drives driving pulley 93 synchronous axial system by long ground caster axle 68, driving pulley 93 drives front driven pulley 100 and rear driven pulley 105 synchronous axial system by belt 106, thus drives front sensor and rear sensor synchronous axial system respectively by front sensor chuck 101 and rear sensor chuck 103.

Method of operating based on belt driven type calibrating apparatus for four-wheel positioning instrument calibrating 3D four-wheel position finder:

1. toe-in test jig at zero point 1 is carried out on request combination to install; Regulate front right combined support leg 9, front left combined support leg 10, rear right combined support leg 11 to make it unsettled with the supporting leg base 99 in rear left combined support leg 12 respectively, four ground castors 4 are landed;

2. front platform good for Installation and Debugging inspection part 2 and rear stand check portion are divided 3 to be arranged on respectively on front erecting bed on test jig 1 at prenex zero point and rear erecting bed, with register pin location, screw is fixed;

3. the left leather belt gearing 20 assembled and right leather belt gearing 19 are arranged on respectively left side and the right side of toe-in test jig at zero point 1;

4. be placed on the lifting frame of 3D four-wheel position finder by what assemble based on belt driven type calibrating apparatus for four-wheel positioning instrument, mounting and adjusting is two sensors and below two sensors above well;

5., according to the step of 3D four-wheel position finder calibrating automobile four-wheel angle, complete the measurement of four-wheel parameters;

6. the parameters value recorded by 3D four-wheel position finder contrasts with the parameters value recorded based on belt driven type calibrating apparatus for four-wheel positioning instrument, can complete the quality arbitration to 3D four-wheel position finder.

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.