Special gauge for rapidly and accurately measuring flange distance of axle housing

Abstract

The invention, which relates to the technical field of the axle housing flange distance measurement checking fixture, discloses a special checking fixture for rapidly and accurately measuring the axle housing flange distance, comprising a positioning sleeve and a dial indicator, and also comprising a fixing assembly arranged on the positioning sleeve and used for fixing the dial indicator and a calibration assembly used for calibrating the dial indicator. The fixing assembly is provided with a rotating assembly used for rotating the dial indicator, the fixing assembly comprises a fixing ring fixedly connected to the side wall of the positioning sleeve, one side of the fixing ring is provided with a mounting block, and one side, far away from the positioning sleeve, of the mounting block is provided with an L-shaped plate. According to the special gauge for rapidly and accurately measuring the flange distance of the axle housing, positioning measurement is carried out in a mode that the inner hole and the end face of the positioning sleeve are matched with the outer circle and the end face of the bearing stand of the workpiece to be measured, operation is convenient, positioning is rapid and accurate, measurement reading is carried out through the dial indicator, and convenience of reading and accuracy of measurement are guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of bridge housing flange distance measuring gauges, in particular to a special gauge for rapid and accurate measurement of bridge housing flange distance. Background Art

[0002] With the continuous improvement of driving safety and comfort performance of commercial vehicles, the production of complete vehicles generally requires the matching of ABS anti-lock braking system. The rear axle assembly, as the support and driving component of the vehicle, needs to install ABS sensors, gear rings and other anti-lock braking system components in place during assembly, and ensure that the sensor signal output is stable and reliable. Therefore, after the light truck model axle housing shaft head and flange plate are fine-turned, it is necessary to ensure the distance from the end face of the bearing platform in the shaft head to the flange brake installation surface, so as to ensure the gap from the ABS sensor head to the end face of the gear ring after the rear axle assembly is assembled.

[0003] In the prior art, during the detection of the distance from the end face of the inner bearing platform of the shaft head to the mounting surface of the flange brake, a depth vernier caliper is used to directly measure the distance from the end face of the inner bearing platform to the flange surface. However, since the inner bearing platform and the end face are in an R-arc transition and the plane width at the end face is small, the caliper is prone to tilt and the reading is inconvenient when measuring with a depth vernier caliper, resulting in a large measurement dimensional error, thereby reducing the accuracy and convenience of detecting the distance from the end face of the inner bearing platform of the shaft head to the mounting surface of the flange brake. For this reason, we propose a special inspection fixture for quickly and accurately measuring the flange distance of the bridge housing. Summary of the invention

[0004] The purpose of the present invention is to provide a special inspection tool for quickly and accurately measuring the flange distance of a bridge housing, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a special gauge for rapid and accurate measurement of the flange distance of a bridge housing, comprising a positioning sleeve and a dial indicator, and also comprising a fixing component arranged on the positioning sleeve for fixing the dial indicator and a calibration component for calibrating the dial indicator, wherein the fixing component is provided with a rotating component for rotating the dial indicator and a protective component for protecting the dial indicator when not in use;

[0006] The fixed component includes a fixing ring fixedly connected to the side wall of the positioning sleeve, a mounting block is provided on one side of the fixing ring, an L-shaped plate is provided on the side of the mounting block away from the positioning sleeve, the dial indicator is arranged on the L-shaped plate and locked by bolts.

[0007] Preferably, an inner wall of the positioning sleeve on one side close to the fixing ring is provided with an oblique angle.

[0008] Preferably, the calibration assembly comprises a convex ring slidably connected to the positioning sleeve, a side of the convex ring away from the positioning sleeve is fixedly connected to a support ring, and the other end of the support ring is fixedly connected to a calibration ring.

[0009] Preferably, the rotating assembly comprises an annular groove formed on a side wall of the fixing ring, the annular groove is rotatably connected to the rotating ring, and the side of the mounting block away from the L-shaped plate is connected to the rotating ring.

[0010] Preferably, the protective component includes a mounting cavity opened in the mounting block, a spline groove is opened on the bottom wall of the mounting cavity, a spline plate is slidably connected to the spline groove, and the mounting cavity is provided with an extrusion component for extruding the spline plate.

[0011] Preferably, the extrusion assembly includes an extrusion rod slidably connected to the mounting cavity, one end of the extrusion rod is connected to the spline plate, the other end of the extrusion rod passes through the mounting block and is connected to the L-shaped plate by a bolt, a first spring is sleeved on the side wall of the extrusion rod, one end of the first spring is connected to the spline plate, the other end of the first spring is fixedly connected to a ring, and the side of the ring away from the first spring is rotatably connected to the inner wall of the mounting cavity.

[0012] Preferably, the positioning sleeve is provided with a limiting assembly for limiting the position of the bearing platform inside the shaft head, the limiting assembly includes two symmetrically arranged T-slots opened on the inner wall of the positioning sleeve, the two T-slots are slidably connected with T-plates, the two T-plates are fixedly connected with two strip plates on the side away from the fixing ring, the limiting plates are connected between two adjacent strip plates via a plurality of T-shaped rotating shafts, and the two T-slots are provided with driving assemblies for driving each limiting plate.

[0013] Preferably, an end face ring is provided on the side of the positioning sleeve away from the fixing ring, the end face ring is connected to the positioning sleeve via a plurality of screws, and one end of the four strip plates away from the T-plate is connected to the end face ring.

[0014] Preferably, the driving assembly includes a driving plate slidably connected to the T-slot, the side wall of the driving plate is fixedly connected to a plurality of racks, each of the side walls of the limiting plate is fixedly connected to an arc-shaped gear ring, each of the arc-shaped gear rings is meshed with the rack, the side of the driving plate away from the fixing ring passes through the end face ring and is fixedly connected to a push plate.

[0015] Preferably, each of the T-shaped rotating shafts is provided with a reset assembly for resetting the limit plate, and the reset assembly comprises a torsion spring sleeved on the side wall of the T-shaped rotating shaft, and both ends of the torsion spring are respectively connected to the side wall of the T-shaped rotating shaft and the strip plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The special inspection tool for rapid and accurate measurement of the flange distance of the bridge housing of the present invention performs positioning measurement by setting a fixing component, a calibration component and a limit component, and adopts the matching mode of the inner hole and end face of the positioning sleeve with the outer circle and end face of the bearing platform of the workpiece to be measured. It is not only convenient to operate, but also has rapid and accurate positioning. Moreover, the measurement reading is carried out by adopting a dial indicator, thereby ensuring the convenience of reading and the accuracy of measurement. At the same time, through the modular combination design, it is not only simple in structure, light in weight and low in manufacturing cost, but also can be adapted to the detection of the distance from the end face of the inner bearing platform of the shaft head to the mounting surface of the flange brake through free combination, thereby improving the flexibility and applicability of the detection.

[0018] 2. The special gauge for quickly and accurately measuring the flange distance of the bridge housing of the present invention can realize the placement of the gauge and reduce the risk of damage caused by bumps and collisions through the provision of protective components. At the same time, it can reduce the risk of bending and deformation of the detection rod of the dial indicator due to long-term squeezing, thereby realizing the protection of the dial indicator when not in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the structure of the fixed component and the rotating component of the present invention;

[0021] Figure 3 It is a schematic diagram of the internal structure of the protection component and the limit component of the present invention;

[0022] Figure 4 This is a schematic diagram of the internal structure of the drive assembly of the present invention;

[0023] Figure 5 It is a schematic diagram of the structure of the calibration component of the present invention;

[0024] Figure 6 This is a schematic diagram of the structure of the dial indicator of the present invention in a protective state when not in use;

[0025] Figure 7 for Figure 3 Enlarged view of point A in the middle;

[0026] Figure 8 for Figure 4 Enlarged view of point B in the middle;

[0027] Fig. 9 The present invention is a schematic diagram of the detection of the distance between the inner bearing platform end face and the flange face measured by the inspection tool of the present invention.

[0028] In the figure: 101, positioning sleeve; 102, dial indicator; 201, fixing ring; 202, mounting block; 203, L-shaped plate; 301, convex ring; 302, support ring; 303, calibration ring; 4, bevel; 501, annular groove; 502, rotating ring; 601, mounting cavity; 602, spline groove; 603, spline plate; 701, extrusion rod; 702, first spring; 703, circular ring; 801, T-slot; 802, end ring; 803, T-plate; 804, strip plate; 805, limit plate; 806, T-shaped rotating shaft; 901, drive plate; 902, rack; 903, arc gear ring; 904, push plate; 10, torsion spring. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Example 1

[0031] See also Figure 1-Figure 9 , a special gauge for rapid and accurate measurement of the flange distance of a bridge housing shown in the figure, including a positioning sleeve 101 and a dial indicator 102, and also including a fixing component arranged on the positioning sleeve 101 for fixing the dial indicator 102 and a calibration component for calibrating the dial indicator 102, the fixing component is provided with a rotating component for rotating the dial indicator 102 and a protective component for protecting the dial indicator 102 when not in use;

[0032] The fixed component includes a fixing ring 201 fixedly connected to the side wall of the positioning sleeve 101, a mounting block 202 is provided on one side of the fixing ring 201, an L-shaped plate 203 is provided on the side of the mounting block 202 away from the positioning sleeve 101, and the dial indicator 102 is set on the L-shaped plate 203 and locked by bolts;

[0033] It should be noted here that: through the setting of the fixing component, the calibration component and the limit component, the positioning measurement is performed by matching the inner hole and end face of the positioning sleeve 101 with the outer circle and end face of the bearing platform of the workpiece to be measured. It is not only convenient to operate, but also fast and accurate in positioning. The dial indicator 102 is used for measurement readings, which ensures the convenience of reading and the accuracy of measurement. At the same time, through the modular combination design, it is not only simple in structure, light in weight and low in production cost, but also can be freely combined to adapt to the detection of the distance from the end face of the inner bearing platform of the shaft head to the mounting surface of the flange brake, thereby improving the flexibility and applicability of the detection.

[0034] See also Figure 3 , the inner wall of the positioning sleeve 101 near the fixing ring 201 is provided with an oblique angle 4;

[0035] It should be noted here that: by setting the bevel angle 4, the positioning sleeve 101 will not contact the R arc of the end surface of the workpiece bearing platform, so that the end surface of the positioning sleeve 101 and the end surface of the workpiece bearing platform are fully abutted.

[0036] See also Figure 5 The calibration assembly shown in the figure includes a convex ring 301 slidably connected to the positioning sleeve 101, a support ring 302 is fixedly connected to one side of the convex ring 301 away from the positioning sleeve 101, and a calibration ring 303 is fixedly connected to the other end of the support ring 302;

[0037] It should be noted here that: the calibration operation of the dial indicator 102 is realized through the setting of the calibration component.

[0038] See also Figure 2 The rotating assembly shown in the figure includes an annular groove 501 formed on the side wall of the fixed ring 201, the annular groove 501 is rotatably connected to a rotating ring 502, and the side of the mounting block 202 away from the L-shaped plate 203 is connected to the rotating ring 502;

[0039] It should be noted here that: through the setting of the rotating component, it is convenient to drive the dial indicator 102 to rotate in the circumferential direction, which not only realizes multi-point detection in the circumferential direction and improves the detection accuracy, but also can realize the flatness detection of the flange brake mounting surface, thereby improving the detection accuracy of the inspection tool.

[0040] See also Figure 3 , Figure 6 and Figure 7 The protection assembly shown in the figure includes a mounting cavity 601 opened in the mounting block 202, a spline groove 602 is opened on the bottom wall of the mounting cavity 601, a spline plate 603 is slidably connected to the spline groove 602, and the mounting cavity 601 is provided with an extrusion assembly for extruding the spline plate 603;

[0041] It should be noted here that: by setting up the protection component, the detection rod of the dial indicator 102 is separated from the calibration ring 303, thereby reducing the risk of the detection rod being bent and deformed due to long-term squeezing, thereby achieving protection for the dial indicator 102 when not in use.

[0042] See also Figure 3 and Figure 7The extrusion assembly shown in the figure includes an extrusion rod 701 slidably connected to the installation cavity 601, one end of the extrusion rod 701 is connected to the spline plate 603, the other end of the extrusion rod 701 penetrates the installation block 202 and is connected to the L-shaped plate 203 by bolts, a first spring 702 is sleeved on the side wall of the extrusion rod 701, one end of the first spring 702 is connected to the spline plate 603, the other end of the first spring 702 is fixedly connected to a ring 703, and the side of the ring 703 away from the first spring 702 is rotatably connected to the inner wall of the installation cavity 601;

[0043] It should be noted here that the extrusion assembly is provided to provide an extrusion driving force to the spline plate 603 .

[0044] See also Figure 3 , Figure 4 and Figure 7 The positioning sleeve 101 shown in the figure is provided with a limiting assembly for limiting the position with the bearing platform in the shaft head, and the limiting assembly includes two T-slots 801 symmetrically arranged on the inner wall of the positioning sleeve 101, and the two T-slots 801 are slidably connected with T-plates 803, and the two T-plates 803 are fixedly connected with two strip plates 804 on the side away from the fixing ring 201, and the two adjacent strip plates 804 are connected with limiting plates 805 through multiple T-shaped rotating shafts 806, and the two T-slots 801 are provided with a driving assembly for driving each limiting plate 805;

[0045] It should be noted here that: by setting the limiting assembly, the tight limiting between the positioning sleeve 101 and the side wall of the workpiece bearing platform is achieved, thereby ensuring the stability of the detection position of the positioning sleeve 101 on the workpiece bearing platform.

[0046] See also Figure 3 , Figure 4 and Figure 7 , the side of the positioning sleeve 101 far away from the fixing ring 201 is provided with an end face ring 802, the end face ring 802 is connected to the positioning sleeve 101 by a plurality of screws, and one end of the four strip plates 804 far away from the T-plate 803 is connected to the end face ring 802;

[0047] It should be noted here that the provision of the end face ring 802 facilitates the installation and disassembly of the limit assembly.

[0048] See also Figure 3 , Figure 4 and Figure 7The driving assembly shown in the figure includes a driving plate 901 slidably connected to the T-slot 801, a plurality of racks 902 are fixedly connected to the side wall of the driving plate 901, an arc-shaped gear ring 903 is fixedly connected to the side wall of each limiting plate 805, each arc-shaped gear ring 903 is meshed with the rack 902, and the side of the driving plate 901 away from the fixing ring 201 penetrates the end face ring 802 and is fixedly connected to a push plate 904;

[0049] It should be noted here that: through the setting of the driving component, during the sliding process of each rack 902, the meshing transmission action of each rack 902 and the arc-shaped gear ring 903 is utilized to drive each limit plate 805 to rotate around the T-shaped rotating shaft 806 as the center of the circle, so that each limit plate 805 rotates into the T-shaped slot 801.

[0050] See also Figure 3 , Figure 4 and Figure 7 , each T-shaped rotating shaft 806 shown in the figure is provided with a reset assembly for resetting the limit plate 805, and the reset assembly includes a torsion spring 10 sleeved on the side wall of the T-shaped rotating shaft 806, and the two ends of the torsion spring 10 are respectively connected to the side wall of the T-shaped rotating shaft 806 and the strip plate 804;

[0051] It should be noted here that: through the setting of the reset component, after the end face of the positioning sleeve 101 abuts against the end face of the workpiece bearing platform, the push on the push plate 904 can be released. At this time, under the elastic action of the torsion spring 10, each limit plate 805 is rotated close to the side wall of the workpiece bearing platform, and then abuts against the side wall of the workpiece bearing platform. Therefore, under the pressing action of each limit plate 805, the pressing and limiting between the positioning sleeve 101 and the side wall of the workpiece bearing platform is achieved, thereby ensuring the stability of the detection position of the positioning sleeve 101 on the workpiece bearing platform.

[0052] Working principle: when measuring the distance from the end face of the inner bearing table to the flange surface, first use bolts to install the L-shaped plate 203 to the end face of the extrusion rod 701, then install the dial indicator 102 to the L-shaped plate 203, and lock it with bolts. After the installation of the dial indicator 102 is completed, hold the positioning sleeve 101, put the positioning sleeve 101 on the convex ring 301, and make the end face of the positioning sleeve 101 abut against the end face of the support ring 302, and then adjust the height of the dial indicator 102 so that the detection rod of the dial indicator 102 abuts against the calibration ring 303 on the support ring 302, and make the detection rod of the dial indicator 102 have a certain amount of expansion and contraction. After the calibration of the detection rod of the dial indicator 102 and the calibration ring 303 is completed, the dial indicator 102 can be rotated to align the pointer of the dial indicator 102 with the zero position on the dial ring. At this time, the calibration of the basic size of the distance from the end face of the inner bearing table to the flange surface is completed;

[0053] After the calibration of the dial indicator 102 is completed, the positioning sleeve 101 can be removed from the convex ring 301 and inserted into the side wall of the inner bearing platform. In the process of inserting the positioning sleeve 101 into the side wall of the inner bearing platform, the two push plates 904 can be pushed to make the racks 902 on the driving plate 901 slide in the T-slot 801. In the process of the sliding of each rack 902, the meshing transmission of each rack 902 and the arc gear ring 903 is used to drive each limit plate 805 to rotate around the T-shaped rotating shaft 806 as the center of the circle. After the positioning sleeve 101 is moved into the T-slot 801, the positioning sleeve 101 can be continuously pushed, so that the positioning sleeve 101 will not make the limiting plates 805 abut against the side wall of the workpiece bearing platform during the sliding process of the positioning sleeve 101 on the side wall of the workpiece bearing platform, thereby reducing the resistance of the positioning sleeve 101 when being sleeved on the side wall of the workpiece bearing platform, and reducing the friction between the positioning sleeve 101 and the side wall of the workpiece bearing platform, thereby reducing the risk of scratching the side wall of the workpiece bearing platform. In the process of continuously pushing the positioning sleeve 101, when the end face of the positioning sleeve 101 fits with the end face of the workpiece bearing platform (refer to Fig. 9 ), stop pushing the positioning sleeve 101, and under the avoidance effect of the bevel 4 at the inner wall of the end face of the positioning sleeve 101, the positioning sleeve 101 will not contact the R arc of the end face of the workpiece bearing platform, so that the end face of the positioning sleeve 101 and the end face of the workpiece bearing platform are fully abutted;

[0054] After the end face of the positioning sleeve 101 abuts against the end face of the workpiece bearing platform, the push on the push plate 904 can be released. At this time, under the elastic action of the torsion spring 10, each limit plate 805 rotates close to the side wall of the workpiece bearing platform and then abuts against the side wall of the workpiece bearing platform. Therefore, under the tight action of each limit plate 805, the tight limit between the positioning sleeve 101 and the side wall of the workpiece bearing platform is achieved, ensuring the stability of the detection position of the positioning sleeve 101 on the workpiece bearing platform.

[0055] When the end face of the positioning sleeve 101 abuts against the end face of the workpiece bearing platform, the detection rod of the dial indicator 102 will abut against the flange brake mounting surface, so that by checking the scale position of the dial indicator 102 pointer and comparing it with the zero position, the actual distance size of the measured piece can be directly obtained, thereby realizing the detection of the distance from the end face of the inner bearing platform of the shaft head to the mounting surface of the flange brake. Therefore, by adopting the matching mode of the inner hole and end face of the positioning sleeve 101 and the outer circle and end face of the bearing platform of the workpiece to be measured for positioning measurement, not only is the operation convenient, the positioning is fast and accurate, but also by adopting the dial indicator 102 for measuring readings, the convenience of reading and the accuracy of measurement are guaranteed. At the same time, through the modular combination design, not only the structure is simple, light and the manufacturing cost is low, but also the detection of the distance from the end face of the inner bearing platform of the shaft head to the mounting surface of the flange brake of different models can be adapted through free combination, thereby improving the flexibility and applicability of detection.

[0056] At the same time, when it is necessary to detect different positions in the circumferential direction to improve the detection accuracy, the rotation of the rotating component can drive the dial indicator 102 to rotate in the circumferential direction, thereby not only realizing multi-point detection in the circumferential direction and improving the detection accuracy, but also realizing the detection of the flatness of the flange brake mounting surface, thereby improving the detection accuracy of the inspection tool, and in the process of the circumferential rotation of the dial indicator 102, the limiting component is used to prevent the positioning sleeve 101 from rotating, thereby reducing the wear between the inner wall and end face of the positioning sleeve 101 and the side wall and end face of the inner bearing platform of the shaft head, thereby realizing the protection of the inner wall and end face of the positioning sleeve 101 and the side wall and end face of the inner bearing platform of the shaft head, and reducing the wear damage during the detection process;

[0057] After the distance between the end face of the inner bearing platform of the shaft head and the mounting surface of the flange brake is detected, the positioning sleeve 101 can be removed from the side wall of the workpiece bearing platform by using the driving component to release the tight limit of each limit plate 805 on the side wall of the workpiece bearing platform and placed on the convex ring 301 on the support ring 302 (refer to Figure 1 ), so as to place the detection tool and reduce the risk of damage caused by collision. At the same time, the spline plate 603 at one end of the extrusion rod 701 can be moved out of the spline groove 602 by pulling the L-shaped plate 203. After the spline plate 603 is moved out of the spline groove 602, the detection rod of the dial indicator 102 can be driven to separate from the calibration ring 303 by rotating the L-shaped plate 203 (refer to Figure 6 ), thereby reducing the risk of the detection rod being bent and deformed due to long-term squeezing, thereby achieving protection for the dial indicator 102 when not in use.

[0058] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0059] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A special inspection tool for rapid and accurate measurement of the bridge housing flange distance, comprising: A positioning sleeve (101) and a dial indicator (102); It is characterized by further comprising: A fixing component arranged on the positioning sleeve (101) for fixing the dial gauge (102) and a calibration component for calibrating the dial gauge (102), wherein the fixing component is provided with a rotating component for rotating the dial gauge (102) and a protective component for protecting the dial gauge (102) when not in use; The fixed component comprises a fixing ring (201) fixedly connected to the side wall of the positioning sleeve (101); a mounting block (202) is provided on one side of the fixing ring (201); an L-shaped plate (203) is provided on the side of the mounting block (202) away from the positioning sleeve (101); the dial indicator (102) is arranged on the L-shaped plate (203) and is locked by bolts.

2. The special inspection tool for rapid and accurate measurement of the bridge housing flange distance according to claim 1, characterized in that: An inner wall of the positioning sleeve (101) close to the fixing ring (201) is provided with an oblique angle (4).

3. The special inspection tool for rapid and accurate measurement of the bridge housing flange distance according to claim 2, characterized in that: The calibration assembly comprises a convex ring (301) slidably connected to the positioning sleeve (101), a side of the convex ring (301) away from the positioning sleeve (101) is fixedly connected to a support ring (302), and the other end of the support ring (302) is fixedly connected to a calibration ring (303).

4. The special inspection tool for rapid and accurate measurement of the flange distance of axle housing according to claim 3, characterized in that: The rotating assembly comprises an annular groove (501) formed on the side wall of the fixed ring (201), the annular groove (501) being rotatably connected to a rotating ring (502), and the side of the mounting block (202) away from the L-shaped plate (203) is connected to the rotating ring (502).

5. The special inspection tool for rapid and accurate measurement of the bridge housing flange distance according to claim 4, characterized in that: The protection component comprises a mounting cavity (601) opened on the mounting block (202), a spline groove (602) is opened on the bottom wall of the mounting cavity (601), a spline plate (603) is slidably connected to the spline groove (602), and the mounting cavity (601) is provided with an extrusion component for extruding the spline plate (603).

6. The special inspection tool for rapid and accurate measurement of the flange distance of axle housing according to claim 5, characterized in that: The extrusion assembly comprises an extrusion rod (701) slidably connected to the installation cavity (601), one end of the extrusion rod (701) is connected to the spline plate (603), the other end of the extrusion rod (701) passes through the installation block (202) and is connected to the L-shaped plate (203) by bolts, a first spring (702) is sleeved on the side wall of the extrusion rod (701), one end of the first spring (702) is connected to the spline plate (603), the other end of the first spring (702) is fixedly connected to a circular ring (703), and the side of the circular ring (703) away from the first spring (702) is rotatably connected to the inner wall of the installation cavity (601).

7. The special inspection tool for rapid and accurate measurement of the flange distance of axle housing according to claim 6, characterized in that: The positioning sleeve (101) is provided with a limiting assembly for limiting the position with the bearing platform inside the shaft head, and the limiting assembly includes two T-slots (801) symmetrically arranged on the inner wall of the positioning sleeve (101), the two T-slots (801) are slidably connected with a T-plate (803), the two T-plates (803) are fixedly connected with two strip plates (804) on the side away from the fixing ring (201), and the limiting plates (805) are connected between two adjacent strip plates (804) via a plurality of T-shaped rotating shafts (806), and the two T-slots (801) are provided with a driving assembly for driving each limiting plate (805).

8. The special inspection tool for rapid and accurate measurement of the flange distance of axle housing according to claim 7, characterized in that: An end face ring (802) is provided on the side of the positioning sleeve (101) away from the fixing ring (201); the end face ring (802) is connected to the positioning sleeve (101) via a plurality of screws; and one end of the four strip plates (804) away from the T-shaped plate (803) is connected to the end face ring (802).

9. The special inspection tool for rapid and accurate measurement of the bridge housing flange distance according to claim 8, characterized in that: The driving assembly comprises a driving plate (901) slidably connected to the T-slot (801); a plurality of racks (902) are fixedly connected to the side wall of the driving plate (901); an arc-shaped gear ring (903) is fixedly connected to the side wall of each of the limiting plates (805); each of the arc-shaped gear rings (903) is meshed with the racks (902); a side of the driving plate (901) away from the fixing ring (201) passes through the end face ring (802) and is fixedly connected to a push plate (904).

10. The special inspection tool for rapid and accurate measurement of the flange distance of axle housing according to claim 9, characterized in that: Each of the T-shaped rotating shafts (806) is provided with a reset assembly for resetting the limit plate (805), and the reset assembly comprises a torsion spring (10) sleeved on the side wall of the T-shaped rotating shaft (806), and the two ends of the torsion spring (10) are respectively connected to the side wall of the T-shaped rotating shaft (806) and the strip plate (804).

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