Rear axle testing fixture positioning structure

Abstract

The utility model provides a rear axle testing fixture positioning structure, which relates to the field of automobile testing fixtures and comprises a bottom plate. Stand columns are welded to the four corners of the upper side face of the bottom plate, a bearing installation plate is welded to the top ends of the stand columns, a transverse clamping motor is installed on the right side face of the bearing installation plate, and a bidirectional threaded rod is installed on a motor shaft of the transverse clamping motor and connected with a transverse sliding block in an engaged mode. The upper clamp device comprises a beam frame; the beam frame is mounted on the upper side surface of the bearing mounting plate through the clamping bolts and the clamping nuts; the bearing device comprises a clamping plate frame, a sliding frame, a placing block and a vertical frame; the upper side face of the vertical frame is connected with a containing block through a bolt. Through the arrangement of the bearing mounting plate, the upper clamp device, the bearing device, the bidirectional threaded rod and the transverse sliding block, the flexibility and applicability of positioning, placing and mounting of the rear axle housing on the detection tool are improved, and the problem that the detection applicability of the detection tool is poor due to the fact that the position of a fixed mounting structure of a traditional automobile rear axle detection tool is rigid and fixed is solved.

Description

Technical Field

[0001] The utility model belongs to the field of automobile inspection tools, and more specifically, particularly relates to a rear axle inspection tool positioning structure. Background Art

[0002] The rear axle is a load-bearing drive device installed between the car body and the wheels. It consists of two half-bridges and can implement half-bridge differential movement. At present, in order to ensure the safety of vehicle driving and reduce the frequency of mechanical failures, the rear axle is usually positioned and installed on the rear axle inspection fixture to detect whether the structural quality performance and structural positioning dimensions of the rear axle meet the standard design requirements. However, when the traditional rear axle inspection fixture is used to position and fix the rear axle, the clamp position of the rear axle inspection fixture and the position of the suspended load-bearing bracket are rigidly fixed. Therefore, the traditional rear axle inspection fixture cannot flexibly change the fixed installation position according to the structural size of the rear axle, resulting in the rear axle inspection fixture can only clamp and position the rear axle of a specific size structure. It can be seen that the traditional rear axle inspection fixture has poor applicability for the positioning and installation of the rear axle. Different sizes of rear axles require specially customized inspection fixtures with corresponding clamping mechanisms, which increases the cost of rear axle inspection. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a rear axle gauge positioning structure to solve the problem that the traditional automobile rear axle gauge fixing and installation structure has a rigid fixed position, resulting in poor gauge detection applicability.

[0004] The invention provides a rear axle inspection fixture positioning structure, including a base; the four corners of the upper side of the base are welded and connected with columns, the top of the column is welded and connected with a bearing mounting plate, the right side of the bearing mounting plate is installed with a transverse clamping motor, the motor shaft of the transverse clamping motor is installed with a two-way threaded rod, the two-way threaded rod is rotatably connected with the bearing mounting plate, and the rear side of the base is installed with a longitudinal displacement motor, and the motor shaft of the longitudinal displacement motor is installed with a longitudinal threaded rod, and the base is rotatably connected with the longitudinal threaded rod; it also includes a rear axle housing, an upper clamp device, a bearing device and an inner support clamp device; the upper clamp device includes a beam frame, a lifting rod, a rotating knob, a threaded pressure rod and a pressure plate; the upper side of the beam frame is welded and connected with the lifting rod, the beam frame is mounted on the upper side of the bearing mounting plate by a clamping bolt and a clamping nut; the top of the threaded pressure rod is installed with a rotating knob, and the bottom end of the threaded pressure rod is rotatably connected with the pressure plate; the bearing device includes a clamping plate frame, a slide frame, a fixing bolt, a placement block and a vertical frame; the lower side of the clamping plate frame The top of the driving mechanism is connected with the driving mechanism, and the transmission gear is connected with the transmission gear of the driving mechanism, and the transmission gear is connected with the transmission gear of the driving mechanism.

[0005] In at least some embodiments, there are two groups of transverse sliders, which are symmetrically distributed on the left and right. A threaded through-hole structure that passes through the left and right sides is provided at the center position of each group of transverse sliders. The positive threaded end of the outer side surface of the bidirectional threaded rod is meshed and connected in the threaded through-hole of the left transverse slider, and the reverse threaded end of the outer side surface of the bidirectional threaded rod is meshed and connected in the threaded through-hole of the right transverse slider.

[0006] In at least some embodiments, the left and right sides of the beam are provided with foot plates near the bottom, the foot plates are provided with through holes extending vertically, a threaded through hole structure extending vertically is provided at the center of the upper side surface of the beam, the outer side surface of the threaded pressure rod is threadedly engaged in the threaded through hole of the beam, through grooves are provided on the left and right sides of the beam, and the left and right ends of the pressure plate are respectively inserted into the two groups of through grooves of the beam.

[0007] In at least some embodiments, a rectangular through groove is provided at the center position of the upper side surface of the load-bearing mounting plate, two groups of transverse sliding blocks are inserted into the rectangular through groove of the load-bearing mounting plate, and two groups of long through grooves are symmetrically provided on the front and rear sides of the rectangular through groove of the load-bearing mounting plate. The two groups of foot plate through holes of the beam frame are connected to the upper side of the long through groove of the load-bearing mounting plate, and the clamping bolts are inserted into the foot plate through holes of the beam frame and the long through groove of the load-bearing mounting plate from top to bottom.

[0008] In at least some embodiments, a threaded through hole is provided on the front side of the longitudinal slider, and the longitudinal threaded rod is engaged and connected in the threaded through hole of the longitudinal slider.

[0009] In at least some embodiments, two groups of long through grooves are symmetrically provided on the upper side surface of the slide near the left and right ends. The long through grooves of the slide are respectively connected to the two groups of threaded holes on the upper side surface of the clamping frame. The fixing bolts are inserted into the through grooves from top to bottom, and the slide is clamped on the upper side surface of the clamping frame by the fixing bolts.

[0010] In at least some embodiments, the front side of the movable frame is provided with three groups of through grooves, which are distributed in a circular array around the central axis of the turntable. The long protrusions of the three groups of inner support frames are respectively embedded in the three groups of through grooves of the movable frame. The rear side of the movable frame is provided with a convex plate, and the convex plate is provided with a threaded through hole which passes through from top to bottom. The threaded adjustment rod is engaged and connected in the threaded through hole of the convex plate of the movable frame.

[0011] In at least some embodiments, the turntable is provided with three groups of oblique through slots, which are distributed in a circular array around the center of the turntable, and the front cylindrical protrusions of the inner support frame are embedded in the oblique through slots of the turntable.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1. In the utility model, the butt-jointed sliding structure of the foot plate through-hole of the beam frame on the upper side of the through-slot of the load-bearing mounting plate cooperates with the butt-jointed sliding structure of the slide frame at the threaded hole on the upper side of the clamping plate frame, so that the beam frame and the slide frame can be adjusted left and right according to the length structure of the rear axle shell, which is convenient for the placement block and the pressure plate to respectively support and clamp the upper and lower sides of the rear axle shells of different length structures, thereby improving the flexibility and applicability of the positioning, placement and installation of the rear axle shell on the inspection fixture.

[0014] 2. In the utility model, a transverse clamping motor drives a bidirectional threaded rod and a transverse slider to form a threaded engagement transmission mechanism, so that two groups of transverse sliders drive two groups of clamping plate frames to limit and clamp the left and right ends of rear axle housings of different lengths to prevent the rear axle housing from shifting to the left or right due to collision.

[0015] 3. In the utility model, an inner support clamp device is provided, and a driving motor is used to drive the nested sliding structure formed by the oblique through grooves of the turntable and the cylindrical protrusions of the inner support frame, so that the inner support frame slides synchronously along the three groups of through grooves of the moving frame, and the inner support frame contacts the inner side wall of the central through hole of the rear axle shell synchronously. The inner support frame clamps the central through hole of the rear axle shell to prevent the rear axle shell from flipping forward and backward due to collision during the structural measurement process, which affects the subsequent measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] Figure 2 It is a rear side structural schematic diagram of the utility model.

[0018] Figure 3 It is a front view structural schematic diagram of the utility model.

[0019] Figure 4 It is a right-side structural schematic diagram of the utility model.

[0020] Figure 5 It is a rear view structural schematic diagram of the utility model.

[0021] Figure 6 It is a top view structural schematic diagram of the utility model.

[0022] Figure 7 It is a structural schematic diagram of the upper clamp device of the utility model.

[0023] Figure 8 It is a structural schematic diagram of the bearing device of the utility model.

[0024] Fig. 9 It is a schematic diagram of the structure of the load-bearing device of the utility model from a top view.

[0025] Fig.10 It is a structural schematic diagram of the inner support clamp device of the utility model.

[0026] Fig.11 It is a schematic diagram of the rear side structure of the inner support clamp device of the utility model.

[0027] Fig.12 It is a schematic diagram of the cutaway structure of the inner support clamp device of the utility model.

[0028] Reference numerals:

[0029] 1. Bottom plate;

[0030] 2. Column;

[0031] 3. Longitudinal threaded rod;

[0032] 4. Load-bearing mounting plate;

[0033] 5. Horizontally clamp the motor;

[0034] 6. Bidirectional threaded rod;

[0035] 7. Longitudinal slider;

[0036] 8. Horizontal slider;

[0037] 9. Clamping bolts;

[0038] 10. Clamping nut;

[0039] 11. Rear axle housing;

[0040] 12. Longitudinal displacement motor;

[0041] 13. Upper clamp device; 1301. Beam frame; 1302. Lifting rod; 1303. Turning knob; 1304. Threaded pressure rod; 1305. Pressure plate;

[0042] 14. Carrying device; 1401. Clamping frame; 1402. Sliding frame; 1403. Fixing bolt; 1404. Placement block; 1405. Stand;

[0043] 15. Internal support fixture device; 1501. Moving frame; 1502. Mounting bracket; 1503. Internal support frame; 1504. Turntable; 1505. Driving motor; 1506. Large gear; 1507. Small gear; 1508. Threaded adjustment rod; 1509. Adjustment knob; 1510. Transmission rod. DETAILED DESCRIPTION

[0044] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0045] like Figure 1-Figure 12As shown, the utility model provides a rear axle inspection fixture positioning structure, including a bottom plate 1; columns 2 are welded to the four corners of the upper side of the bottom plate 1, and a load-bearing mounting plate 4 is welded to the top of the column 2. A transverse clamping motor 5 is installed on the right side of the load-bearing mounting plate 4, and a bidirectional threaded rod 6 is installed on the motor shaft of the transverse clamping motor 5. The bidirectional threaded rod 6 is rotatably connected to the load-bearing mounting plate 4, and a longitudinal displacement motor 12 is installed on the rear side of the bottom plate 1. A longitudinal threaded rod 3 is installed on the motor shaft of the longitudinal displacement motor 12, and the bottom plate 1 is rotatably connected to the longitudinal threaded rod 3; it also includes a rear axle housing 11, an upper clamp device 13, a load-bearing device 14 and an inner support clamp device 15; the upper clamp device 1 3 includes a beam frame 1301, a lifting rod 1302, a knob 1303, a threaded pressure rod 1304 and a pressure plate 1305; the upper side of the beam frame 1301 is welded with the lifting rod 1302, and the beam frame 1301 is installed on the upper side of the bearing mounting plate 4 through the clamping bolts 9 and the clamping nuts 10; the top of the threaded pressure rod 1304 is installed with a knob 1303, and the bottom of the threaded pressure rod 1304 is rotatably connected with the pressure plate 1305; the bearing device 14 includes a clamping plate frame 1401, a sliding frame 1402, a fixing bolt 1403, a placement block 1404 and a stand 1405; the lower side of the clamping plate frame 1401 is welded with a transverse slider 8, and the upper side of the clamping plate frame 1401 is provided with There are two groups of threaded holes, and fixing bolts 1403 are screwed into the threaded holes of the clamping frame 1401; the sliding frame 1402 is installed on the lower side of the vertical frame 1405, and the upper side of the vertical frame 1405 is connected with a placement block 1404 by bolts; the internal support fixture device 15 includes a moving frame 1501, a mounting bracket 1502, an internal support frame 1503, a turntable 1504, a driving motor 1505, a large gear 1506, a small gear 1507, a threaded adjustment rod 1508, an adjustment knob 1509 and a transmission rod 1510; a cylindrical convex column is provided on the front side of the internal support frame 1503, and a long strip convex block is provided on the rear side of the internal support frame 1503; the moving frame 1501 and the internal support frame 1503 Sliding connection, the rear side of the mobile frame 1501 is connected to the driving motor 1505 by bolts, and a small gear 1507 is installed on the motor shaft of the driving motor 1505. The outer side of the small gear 1507 is meshed with the large gear 1506, and the large gear 1506 is welded to the outer side of the transmission rod 1510; the front end of the transmission rod 1510 is welded with a turntable 1504, and the transmission rod 1510 is rotatably connected to the mobile frame 1501; the bottom end of the threaded adjustment rod 1508 is rotatably connected to the upper side of the mounting bracket 1502, and the lower side of the mounting bracket 1502 is welded with a longitudinal slider 7, and the top of the threaded adjustment rod 1508 is installed with an adjustment knob 1509.

[0046] In the disclosed embodiment, there are two groups of transverse sliders 8, which are symmetrically distributed on the left and right. A threaded through hole structure that passes through the left and right sides is provided at the center position of each group of transverse sliders 8. The positive threaded end of the outer side surface of the two-way threaded rod 6 is meshed and connected in the threaded through hole of the left transverse slider 8, and the reverse threaded end of the outer side surface of the two-way threaded rod 6 is meshed and connected in the threaded through hole of the right transverse slider 8. When the transverse clamping motor 5 drives the two-way threaded rod 6 to rotate, the two groups of transverse sliders 8 are driven to move left and right in opposite directions. The two groups of transverse sliders 8 respectively pull the two groups of clamping plate frames 1401 to clamp the left and right ends of the rear axle housings 11 of different lengths.

[0047] In the disclosed embodiment, foot plates are provided on the left and right sides near the bottom end of the beam 1301, and through holes are provided on the foot plates, and a threaded through hole structure is provided at the center position of the upper side surface of the beam 1301, and the outer side surface of the threaded pressure rod 1304 is threadedly engaged and connected in the threaded through hole of the beam 1301. Through grooves are provided on the left and right sides of the beam 1301, and the left and right ends of the pressure plate 1305 are respectively inserted into the two groups of through grooves of the beam 1301, and the beam 1301 drives the rotationally connected pressure plate 1305 to move vertically along the two groups of through grooves of the beam 1301, so that the pressure plate 1305 cooperates with the clamping plate frame 1401 to clamp the rear axle housing 11 up and down.

[0048] In the disclosed embodiment, a rectangular through groove is provided at the center position of the upper side surface of the load-bearing mounting plate 4, and two groups of transverse sliding blocks 8 are inserted in the rectangular through groove of the load-bearing mounting plate 4, so that the transverse sliding blocks 8 can slide left and right along the rectangular through groove of the load-bearing mounting plate 4, so that the two groups of clamping plate frames 1401 can stably clamp the rear axle housing 11, and the front and rear sides of the rectangular through groove of the load-bearing mounting plate 4 are symmetrically provided with two groups of long through grooves, and the two groups of foot plate through holes of the beam frame 1301 are connected to the upper side of the long through groove of the load-bearing mounting plate 4, and the clamping bolts 9 are inserted into the foot plate through holes of the beam frame 1301 and the long through groove of the load-bearing mounting plate 4 from top to bottom in sequence, and the clamping bolts 9 cooperate with the clamping nuts 10 on the bottom side of the long through groove of the load-bearing mounting plate 4, so that the beam frame 1301 can be fixedly installed at any position along the long through groove of the load-bearing mounting plate 4, so that the upper clamp device 13 adjusts the extrusion and clamping position of the pressure plate 1305 on the upper side of the rear axle housing 11 according to the structural length of the rear axle housing 11.

[0049] In the disclosed embodiment, a threaded through hole is provided on the front side of the longitudinal slider 7, and the longitudinal threaded rod 3 is meshedly connected in the threaded through hole of the longitudinal slider 7, so that the longitudinal threaded rod 3 drives the longitudinal slider 7 to move forward and backward along the through groove of the supporting mounting plate 4, and allows the inner support frame 1503 of the inner support clamp device 15 to penetrate into the through hole in the middle of the rear axle housing 11 for support, thereby preventing the rear axle housing 11 from flipping forward and backward.

[0050] In the disclosed embodiment, two groups of long through grooves are symmetrically provided on the upper side surface of the slide 1402 near the left and right ends. The long through grooves of the slide 1402 are respectively connected to the two groups of threaded holes on the upper side surface of the clamping frame 1401. The fixing bolts 1403 are inserted into the through grooves from top to bottom. The slide 1402 is clamped on the upper side surface of the clamping frame 1401 by the fixing bolts 1403. When the fixing bolts 1403 are loosened, the slide 1402 slides on the upper side of the clamping frame 1401, so that the slide 1402 carries the placement block 1404 connected by the bolts on the upper side of the vertical frame 1405, and the load-bearing placement position is changed according to the structural size of the rear axle housing 11.

[0051] In the disclosed embodiment, three groups of through grooves are provided on the front side of the movable frame 1501, and the through grooves are distributed in a circular array around the central axis of the turntable 1504. The long protrusions of the three groups of inner support frames 1503 are respectively embedded in the three groups of through grooves of the movable frame 1501, and a convex plate is provided on the rear side of the movable frame 1501. The convex plate is provided with a threaded through hole that passes through the upper and lower parts. The threaded adjustment rod 1508 is meshed and connected in the threaded through hole of the convex plate of the movable frame 1501. The threaded adjustment rod 1508 drives the movable frame 1501 to move vertically up and down during rotation, and is adjusted according to the height position of the central through hole of the rear axle housing 11, so that the central axis of the turntable 1504 coincides with the central axis of the central through hole of the rear axle housing 11, ensuring that the three groups of inner support frames 1503 synchronously contact and clamp the inner side wall of the central through hole of the rear axle housing 11 to ensure stable clamping.

[0052] In the disclosed embodiment, the turntable 1504 is provided with three groups of oblique through grooves, which are distributed in a circular array around the center of the turntable 1504. The front cylindrical protrusions of the inner support frame 1503 are embedded in the oblique through grooves of the turntable 1504. During the rotation of the turntable 1504, the cylindrical protrusion structure of the inner support frame 1503 is pushed through the oblique through grooves, so that the three groups of inner support frames 1503 move along the three groups of through grooves of the moving frame 1501 respectively, and the three groups of inner support frames 1503 move and extend outward in a synchronous manner.

[0053] The specific usage and function of this embodiment are as follows:

[0054] When the utility model is performing the rear axle positioning and installation work on the inspection fixture, the position of the slide 1402 is first adjusted according to the length of the rear axle housing 11, and the two sets of through grooves of the slide 1402 are docked with the threaded holes on the upper side of the clamping plate frame 1401, and the slide 1402 is moved to a suitable position according to the length of the rear axle housing 11. During the movement, the two sets of through grooves of the slide 1402 are always docked with the threaded holes on the upper side of the clamping plate frame 1401, and then the fixing bolts 1403 are inserted into the through grooves of the slide 1402, and the fixing bolts 1403 are screwed into the threaded holes of the clamping plate frame 1401, so that the fixing bolts 1403 fix the position of the slide 1402, and then the rear axle housing 11 is placed in the groove on the upper side of the placement block 1404. At this time The transverse clamping motor 5 drives the bidirectional threaded rod 6 to rotate. Since the threaded through holes of the two groups of transverse sliders 8 are respectively engaged with the forward threaded end and the reverse threaded end of the bidirectional threaded rod 6, the bidirectional threaded rod 6 synchronously drives the two groups of transverse sliders 8 to move left and right. The two groups of transverse sliders 8 respectively drive the two groups of clamping frames 1401 of the bearing devices 14 to move left and right. The two groups of clamping frames 1401 are respectively attached to the left and right end faces of the rear axle housing 11 for limit clamping to prevent the axle housing 11 from shifting left and right. Then, hold the lifting rod 1302 and according to the length structure of the rear axle housing 11, dock the foot plate through hole of the beam frame 1301 at the appropriate position of the long through groove of the bearing mounting plate 4, and then insert the clamping bolts 9 into the foot plate through hole of the beam frame 1301 from top to bottom. The fixing nut 10 is screwed onto the outer side thread surface of the fixing bolt 9, so that the fixing nut 10 cooperates with the fixing bolt 9 to fix the beam frame 1301 on the upper side of the long through slot of the bearing mounting plate 4, and then the knob 1303 is manually turned, and the knob 1303 drives the threaded pressure rod 1304 to rotate. Since the threaded pressure rod 1304 is engaged and connected in the threaded through hole of the beam frame 1301, the threaded pressure rod 1304 drives the pressure plate 1305 to move vertically downward along the through slot of the beam frame 1301, and the pressure plate 1305 and the placement block 1404 clamp the rear axle housing 11 up and down to prevent the rear axle housing 11 from shifting up and down, and the adjusting knob 1509 is turned, and the adjusting knob 1509 drives the threaded adjusting rod 15 08 rotates, and the threaded adjustment rod 1508 drives the movable frame 1501 meshed with the outer side to move vertically up and down, so that the central axis of the turntable 1504 coincides with the central axis of the central through hole of the rear axle housing 11, ensuring that the three groups of inner support frames 1503 synchronously contact the inner wall of the through hole of the rear axle housing 11, and the longitudinal displacement motor 12 drives the longitudinal threaded rod 3 to rotate, and the longitudinal threaded rod 3 drives the movable frame 1501 welded on the upper side of the longitudinal slider 7 to move forward until the three groups of inner support frames 1503 penetrate into the through hole of the rear axle housing 11, and then the driving motor 1505 drives the small gear 1507 to rotate, and the small gear 1507 drives the large gear 1506 to rotate, and the large gear 1506 drives the turntable 1504 welded at the front end of the transmission rod 1510 to rotate.At this time, the groove walls of the three groups of oblique through grooves of the rotating disk 1504 squeeze and push the cylindrical protruding column structure of the inner support frame 1503, so that the long strip protrusions on the rear side of the three groups of inner support frames 1503 move along the three groups of through grooves of the moving frame 1501 respectively, until the three groups of inner support frames 1503 simultaneously contact the inner side walls of the through hole of the rear axle housing 11, and perform the limiting internal support clamping work on the central through hole of the rear axle housing 11 to prevent the rear axle housing 11 from flipping forward and backward.

[0055] The installation, connection or setting methods of all the above components are common mechanical methods, such as welding, threaded connection, screw connection, etc., and the specific structures, models and coefficient indicators of all its components are its own technology, as long as it can achieve its beneficial effects, it can be implemented. The horizontal clamping motor 5, longitudinal displacement motor 12, and drive motor 1505 used above are all common components on the market. When you buy them back and use them, you only need to connect them according to the instruction manual purchased together, so I will not repeat them here.

[0056] The technical solution of the present invention is not limited to the scope of the embodiments of the present invention, and the technical contents not described in detail in the present invention are all well-known technologies.

Claims

1. A rear axle inspection fixture positioning structure, comprising a base plate (1); columns (2) are welded to the four corners of the upper side of the base plate (1); a load-bearing mounting plate (4) is welded to the top of the column (2); a transverse clamping motor (5) is mounted on the right side of the load-bearing mounting plate (4); a bidirectional threaded rod (6) is mounted on the motor shaft of the transverse clamping motor (5); the bidirectional threaded rod (6) is rotatably connected to the load-bearing mounting plate (4); a longitudinal displacement motor (12) is mounted on the rear side of the base plate (1); a longitudinal threaded rod (3) is mounted on the motor shaft of the longitudinal displacement motor (12); the base plate (1) is rotatably connected to the longitudinal threaded rod (3); and the characteristics are: It also includes a rear axle housing (11), an upper clamp device (13), a bearing device (14) and an inner support clamp device (15); the upper clamp device (13) includes a beam frame (1301), a lifting rod (1302), a knob (1303), a threaded pressure rod (1304) and a pressure plate (1305); the upper side surface of the beam frame (1301) is welded with the lifting rod (1302), and the beam frame (1301) is installed on the upper side surface of the bearing mounting plate (4) through a clamping bolt (9) and a clamping nut (10); the top end of the threaded pressure rod (1304) is installed with a knob (1303), and the bottom end of the threaded pressure rod (1304) is rotated to rotate. The support device (14) comprises a clamping frame (1401), a slide frame (1402), fixing bolts (1403), a placement block (1404) and a stand (1405); the lower side of the clamping frame (1401) is welded with a transverse slider (8), the upper side of the clamping frame (1401) is provided with two groups of threaded holes, and the threaded holes of the clamping frame (1401) are screwed with fixing bolts (1403); the lower side of the stand (1405) is installed with a slide frame (1402), and the upper side of the stand (1405) is connected with the placement block (1404) by bolts; the inner support fixture device (15) The invention comprises a movable frame (1501), a mounting bracket (1502), an inner support frame (1503), a turntable (1504), a driving motor (1505), a large gear (1506), a small gear (1507), a threaded adjustment rod (1508), an adjustment knob (1509) and a transmission rod (1510); a cylindrical protrusion is provided on the front side of the inner support frame (1503), and a long strip protrusion is provided on the rear side of the inner support frame (1503); the movable frame (1501) is slidably connected to the inner support frame (1503), and the rear side of the movable frame (1501) is connected to the driving motor (1505) by bolts, and the driving motor (1505) A small gear (1507) is mounted on the motor shaft, the outer side surface of the small gear (1507) is meshedly connected with a large gear (1506), and the large gear (1506) is welded to the outer side surface of the transmission rod (1510); a rotating disk (1504) is welded to the front end of the transmission rod (1510), and the transmission rod (1510) is rotatably connected to the moving frame (1501); the bottom end of the threaded adjustment rod (1508) is rotatably connected to the upper side surface of the mounting bracket (1502), and the lower side surface of the mounting bracket (1502) is welded with a longitudinal slider (7), and the top end of the threaded adjustment rod (1508) is mounted with an adjustment knob (1509).

2. A rear axle inspection fixture positioning structure as claimed in claim 1, characterized in that: The number of the transverse sliders (8) is two groups, and the transverse sliders (8) are symmetrically distributed on the left and right. A threaded through hole structure that passes through the left and right is provided at the center position of each group of transverse sliders (8). The positive threaded end of the outer side surface of the bidirectional threaded rod (6) is meshedly connected to the threaded through hole of the left transverse slider (8), and the reverse threaded end of the outer side surface of the bidirectional threaded rod (6) is meshedly connected to the threaded through hole of the right transverse slider (8).

3. A rear axle inspection fixture positioning structure as claimed in claim 1, characterized in that: The left and right sides of the beam frame (1301) are both provided with foot plates near the bottom end, and the foot plates are provided with through holes extending vertically. A threaded through hole structure extending vertically is provided at the center of the upper side surface of the beam frame (1301). The outer side surface of the threaded pressure rod (1304) is threadedly engaged in the threaded through hole of the beam frame (1301). The left and right sides of the beam frame (1301) are both provided with through grooves, and the left and right ends of the pressure plate (1305) are respectively inserted into two groups of through grooves of the beam frame (1301).

4. A rear axle inspection fixture positioning structure as claimed in claim 1, characterized in that: A rectangular through slot is provided at the center of the upper side surface of the bearing mounting plate (4), two groups of transverse sliding blocks (8) are inserted into the rectangular through slot of the bearing mounting plate (4), two groups of long through slots are symmetrically provided on the front and rear sides of the rectangular through slot of the bearing mounting plate (4), two groups of foot plate through holes of the beam frame (1301) are butted against the upper side of the long through slot of the bearing mounting plate (4), and the clamping bolts (9) are inserted into the foot plate through holes of the beam frame (1301) and the long through slot of the bearing mounting plate (4) in sequence from top to bottom.

5. A rear axle inspection fixture positioning structure as claimed in claim 1, characterized in that: A threaded through hole is provided on the front side of the longitudinal slider (7), and the longitudinal threaded rod (3) is meshedly connected in the threaded through hole of the longitudinal slider (7).

6. A rear axle inspection fixture positioning structure as claimed in claim 1, characterized in that: Two groups of long through grooves are symmetrically provided on the upper side surface of the slide (1402) near the left and right ends. The long through grooves of the slide (1402) are respectively connected to the two groups of threaded holes on the upper side surface of the clamping frame (1401). The fixing bolts (1403) are inserted into the through grooves from top to bottom, and the slide (1402) is clamped on the upper side surface of the clamping frame (1401) by the fixing bolts (1403).

7. A rear axle inspection fixture positioning structure as claimed in claim 1, characterized in that: The front side surface of the movable frame (1501) is provided with three groups of through grooves, which are distributed in a ring array around the central axis of the turntable (1504); the long protrusions of the three groups of inner support frames (1503) are respectively embedded in the three groups of through grooves of the movable frame (1501); the rear side surface of the movable frame (1501) is provided with a convex plate, and the convex plate is provided with a threaded through hole that passes through from top to bottom; the threaded adjustment rod (1508) is meshedly connected in the threaded through hole of the convex plate of the movable frame (1501).

8. A rear axle inspection fixture positioning structure as claimed in claim 1, characterized in that: The turntable (1504) is provided with three groups of oblique through grooves, which are distributed in a ring array around the center of the turntable (1504), and the front cylindrical protrusions of the inner support frame (1503) are embedded in the oblique through grooves of the turntable (1504).

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