Positioning tool for leading datum plane of sleeper beam of metro vehicle to boundary beam

Abstract

The utility model relates to the technical field of metro vehicle positioning tools, in particular to a positioning tool for leading a datum plane of a sleeper beam of a metro vehicle to a boundary beam, which comprises a base, the front side of the base is fixedly connected with the back side of a rotating mechanism, and the rotating mechanism is composed of a motor mounting seat, a rotating motor and a rotating rod. A rotating rotating motor drives a rotating rod to rotate through a coupler, the rotating rod rotates to drive a transmission threaded pipe to rotate through a bevel gear, a lifting threaded rod is driven to move upwards under the threaded action of a through hole of the rotating transmission threaded pipe and the limiting action of a lifting limiting rod, and the lifting threaded rod moves upwards to drive a lifting top plate to move upwards; the lifting top plate moves upwards to drive the laser mounting base to move upwards, the laser mounting base moves upwards to drive the laser generator to move upwards through the laser mounting ring, the laser generator moves upwards to change laser measuring points so as to adapt to different types of metro vehicles, and the application range of the device is widened.

Description

Technical Field

[0001] The utility model relates to the technical field of subway vehicle positioning tooling, in particular to a positioning tooling used for leading a datum surface of a subway vehicle's bolster to a side beam. Background Art

[0002] Urban rail transit has the advantages of convenience, speed, punctuality and huge passenger capacity. It is one of the most important public transportation components in modern cities. The development of urban rail transit is the best solution to the traffic congestion problem in large cities. As the basic tool for urban rail transit, urban rail transit vehicles are high-tech products that integrate mechanical engineering, power electronics, microelectronic control, network control, ergonomics, aerodynamics, transportation science and other disciplines. During the vehicle debugging process, the determination of the measurement benchmark plays a vital role.

[0003] Currently, most of the positioning fixtures on the market that extend the reference plane of the subway vehicle sleeper beam to the side beam are fixed positioning devices. When facing different types of subway sleepers, the height of the laser measurement point is relatively fixed and the adaptability range is small. Utility Model Content

[0004] The purpose of the present invention is to provide a positioning fixture for leading the reference plane of the bolster of a subway vehicle to the side beam, so as to solve the problem raised in the above-mentioned background technology that the height of the laser measurement point is relatively fixed and the adaptability range is small when facing different types of subway bolsters. In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a positioning fixture for leading the reference plane of the bolster of a subway vehicle to the side beam, comprising a base, the front of the base is fixedly connected to the back of a rotating mechanism, the rotating mechanism is composed of a motor mounting seat, a rotating motor, a rotating rod, a connecting square column, a rotating mounting plate, a rotating threaded rod and a rotating fixed block, the outer wall of the rotating mechanism near one end is connected to the outer wall of the bottom end of the transmission mechanism, the transmission mechanism comprises a transmission threaded tube, a transmission fixed block and a transmission abutment plate, the bottom of the transmission mechanism is movably engaged with the top of the front of the base;

[0005] The inner wall of the transmission mechanism is threadedly connected to the outer wall of the lifting mechanism. The lifting mechanism consists of a lifting threaded rod, a lifting top plate and two lifting limit rods. The top of the lifting mechanism is movably connected to the bottom of the laser mechanism. The laser mechanism includes a laser mounting seat, a laser mounting ring and a laser generator. The outer wall of the middle part of the rotating mechanism is threadedly connected to the inner walls of the two moving mechanisms respectively, and the outer walls of the two moving mechanisms are slidably connected to the inner wall of the base.

[0006] Preferably, the base includes an aluminum alloy extension arm, a sliding groove, a nylon positioning shaft and a pull ring, a sliding groove is provided at the top of the middle part of the aluminum alloy extension arm, and the top of the aluminum alloy extension arm near the back is fixedly connected to the bottom of the nylon positioning shaft, the back of the aluminum alloy extension arm is movably abutted against the front of the pull ring, and the front of the middle part and the back of the middle part of the aluminum alloy extension arm are respectively provided with rotating through holes, and the top of the aluminum alloy extension arm near the front is provided with a connecting through hole.

[0007] The top of the motor mount is movably engaged with the bottom of the rotating motor, and one end of the rotating motor is fixedly connected to one end of the rotating rod through a coupling, and a rotating square hole is provided on the back of the rotating rod, the inner wall of the rotating square hole is slidably connected to the outer wall of the connecting square column, and the back of the connecting square column is fixedly connected to the front of the rotating mounting plate, the back of the rotating mounting plate is fixedly connected to the front of the rotating threaded rod, and the outer wall of the rotating threaded rod near the other end is rotatably connected to the inner wall of one of the rotating through holes, the outer wall of one end of the rotating rod is rotatably connected to the inner wall of the other rotating through hole, and the outer wall of the rotating threaded rod near the middle is rotatably connected to the inner wall of the rotating fixed block, the bottom of the rotating fixed block is movably engaged with the inner bottom wall of the sliding groove, and the outer wall of the rotating rod near one end is provided with a bevel gear, and the other end of the rotating threaded rod is fixedly connected to the front of the pull ring.

[0008] Preferably, the outer wall of the bottom end of the transmission threaded tube is provided with a bevel gear, and the outer wall of the bottom end of the transmission threaded tube is transmission-connected to the outer wall of the rotating rod near one end through the bevel gear, the outer wall of the top of the transmission threaded tube is rotationally connected to the inner wall of the transmission fixing block, and the bottom of the transmission fixing block is fixedly connected to the top of the aluminum alloy extension arm near the front, the back of the transmission fixing block is fixedly connected to the front of the transmission support plate, and the bottom of the transmission support plate is fixedly connected to the top of the aluminum alloy extension arm near the front, and limiting through holes are respectively provided on the top near both sides of the transmission fixing block.

[0009] Preferably, the outer wall of the lifting threaded rod is threadedly connected to the inner wall of the transmission threaded tube, and the top of the lifting threaded rod is fixedly connected to the bottom of the middle part of the lifting top plate, the bottom of the lifting top plate close to both sides is respectively fixedly connected to the top of the two lifting limit rods, and the outer walls of the two lifting limit rods are respectively movably connected to the inner walls of the two limit through holes.

[0010] Preferably, the bottom of the laser mounting seat is movably engaged with the bottom of the lifting top plate, and the top of the laser mounting seat is fixedly connected to the bottom of the laser mounting ring, and the inner wall of the laser mounting ring is movably engaged with the outer wall of the laser generator.

[0011] Preferably, the two movable mechanisms each include a movable mounting seat, a steel support and three mounting bolts, wherein a movable through-hole is provided on the front face of one of the movable mounting seats, and the inner wall of the movable through-hole is rotatably connected to the outer wall of the other end of the rotating threaded rod, the top of the movable mounting seat is fixedly connected to the bottom of the steel support, and the inner bottom wall of the steel support is respectively provided with three mounting through-holes, the inner walls of the three mounting through-holes are respectively threadedly connected to the outer walls of the three mounting bolts, the front face of the other movable mounting seat is provided with a threaded through-hole, and the inner wall of the threaded through-hole is threadedly connected to the outer wall of the middle part of the rotating threaded rod, and the outer walls of the two movable mounting seats are both slidably connected to the inner wall of the sliding groove.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] In the utility model, by starting the rotating motor, the rotating motor drives the rotating rod to rotate through the coupling, the rotating rod rotates and drives the transmission threaded tube to rotate through the bevel gear, the rotating transmission threaded tube through the threaded hole and the limiting action of the lifting limit rod drive the lifting threaded rod to move upward, the upward movement of the lifting threaded rod drives the lifting top plate to move upward, the upward movement of the lifting top plate drives the laser mounting seat to move upward, the upward movement of the laser mounting seat drives the laser generator to move upward through the laser mounting ring, and the upward movement of the laser generator can change the laser measurement point to adapt to different types of subway vehicles, thereby improving the applicability of the device.

[0014] In the utility model, the pull ring is pushed, and the linear motion of the pull ring drives the rotating threaded rod to move linearly, the linear motion of the rotating threaded rod drives the rotating mounting plate to move linearly, the linear motion of the rotating mounting plate drives the connecting square column to move linearly, the connecting square column linearly passes into the rotating square hole, and the rotating rotating rod drives the connecting square column to rotate, the rotating connecting square column drives the rotating threaded rod to rotate through the rotating mounting plate, and the rotating rotating threaded rod drives the movable mounting seat to move linearly through the action of the thread and the limiting action of the sliding groove. The linear motion of the movable mounting seat can drive the linear motion of the steel support through the installation bolt, and the linear motion of the steel support can increase the distance between the two steel supports. The stability of the aluminum alloy extension arm can be improved by increasing the support area according to different subway vehicle sleepers. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional view of the utility model;

[0016] Figure 2 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 3 It is an exploded view of the utility model;

[0018] Figure 4This is an exploded view of the transmission mechanism in the present utility model;

[0019] Figure 5 This is an exploded view of the lifting mechanism in the utility model;

[0020] Figure 6 This is an exploded view of the laser mechanism in the present utility model;

[0021] Figure 7 For this utility model Figure 3 A magnified view of the structure in Figure 1.

[0022] In the figure: 1. Base; 101. Aluminum alloy extension arm; 102. Sliding groove; 103. Nylon positioning shaft; 104. Pull ring; 2. Rotating mechanism; 201. Motor mounting seat; 202. Rotating motor; 203. Rotating rod; 204. Connecting square column; 205. Rotating mounting plate; 206. Rotating threaded rod; 207. Rotating fixed block; 3. Transmission mechanism; 301. Transmission threaded tube; 302. Transmission fixed block; 303. Transmission stop plate; 4. Lifting mechanism; 401. Lifting threaded rod; 402. Lifting top plate; 403. Lifting limit rod; 5. Laser mechanism; 501. Laser mounting seat; 502. Laser mounting ring; 503. Laser generator; 6. Moving mechanism; 601. Moving mounting seat; 602. Steel support; 603. Mounting bolts. DETAILED DESCRIPTION

[0023] 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 embodiments described 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 technical personnel in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0024] See also Figures 1 to 7 The utility model provides a technical solution: a positioning tool for leading the reference surface of the bolster beam of a subway vehicle to the side beam, comprising a base 1, the front side of the base 1 being fixedly connected to the back side of a rotating mechanism 2, the rotating mechanism 2 being composed of a motor mounting seat 201, a rotating motor 202, a rotating rod 203, a connecting square column 204, a rotating mounting plate 205, a rotating threaded rod 206 and a rotating fixed block 207, the outer wall of the rotating mechanism 2 near one end being transmission-connected to the outer wall of the bottom end of a transmission mechanism 3, the transmission mechanism 3 comprising a transmission threaded tube 301, a transmission fixed block 302 and a transmission abutment plate 303, the bottom of the transmission mechanism 3 being movably engaged with the top of the front side of the base 1;

[0025] The inner wall of the transmission mechanism 3 is threadedly connected to the outer wall of the lifting mechanism 4. The lifting mechanism 4 consists of a lifting threaded rod 401, a lifting top plate 402 and two lifting limit rods 403. The top of the lifting mechanism 4 is movably connected to the bottom of the laser mechanism 5. The laser mechanism 5 includes a laser mounting seat 501, a laser mounting ring 502 and a laser generator 503. The outer wall of the middle part of the rotating mechanism 2 is threadedly connected to the inner walls of the two moving mechanisms 6 respectively, and the outer walls of the two moving mechanisms 6 are slidably connected to the inner wall of the base 1.

[0026] In this embodiment, Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7 As shown, the base 1 includes an aluminum alloy extension arm 101, a sliding groove 102, a nylon positioning shaft 103 and a pull ring 104. The sliding groove 102 is provided at the top of the middle part of the aluminum alloy extension arm 101, and the top of the aluminum alloy extension arm 101 near the back is fixedly connected to the bottom of the nylon positioning shaft 103. The back of the aluminum alloy extension arm 101 is movably abutted against the front of the pull ring 104, and the front of the middle part and the back of the middle part of the aluminum alloy extension arm 101 are respectively provided with rotating through holes. The top of the aluminum alloy extension arm 101 near the front is provided with a connecting through hole. The nylon positioning shaft 103 can be inserted into the air spring hole of the vehicle body to support the aluminum alloy extension arm 101, so that the two steel supports 602 are tightly fitted with the contact surface of the air spring.

[0027] In this embodiment, Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7As shown, the back of the motor mounting seat 201 is fixedly connected to the front of the aluminum alloy extension arm 101, and the top of the motor mounting seat 201 is movably connected to the bottom of the rotating motor 202, one end of the rotating motor 202 is fixedly connected to one end of the rotating rod 203 through a coupling, and a rotating square hole is provided on the back of the rotating rod 203, the inner wall of the rotating square hole is slidably connected to the outer wall of the connecting square column 204, and the back of the connecting square column 204 is fixedly connected to the front of the rotating mounting disk 205, the back of the rotating mounting disk 205 is fixedly connected to the front of the rotating threaded rod 206, and the outer wall of the rotating threaded rod 206 near the other end is rotatably connected to the inner wall of one of the rotating through holes, the outer wall of one end of the rotating rod 203 is rotatably connected to the inner wall of the other rotating through hole, and the outer wall of the rotating threaded rod 206 near the middle is rotatably connected to the inner wall of the rotating fixed block 207, The bottom of the rotating fixed block 207 is movably engaged with the inner bottom wall of the sliding groove 102, and a bevel gear is provided on the outer wall of the rotating rod 203 near one end. The other end of the rotating threaded rod 206 is fixedly connected to the front of the pull ring 104, and the rotating motor 202 is started. The rotating rotating motor 202 drives the rotating rod 203 to rotate through the coupling, pushing the pull ring 104. The linear motion of the pull ring 104 drives the rotating threaded rod 206 to move linearly. The linear motion of the rotating threaded rod 206 drives the rotating mounting disk 205 to move linearly. The linear motion of the rotating mounting disk 205 drives the connecting square column 204 to move linearly. The connecting square column 204 moves linearly and penetrates into the rotating square hole. The connecting square column 204 is rotated by the rotating rotating rod 203. The rotating connecting square column 204 drives the rotating threaded rod 206 to rotate through the rotating mounting disk 205.

[0028] In this embodiment, Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7 As shown, the outer wall of the bottom end of the transmission threaded tube 301 is provided with a bevel gear, and the outer wall of the bottom end of the transmission threaded tube 301 is transmission-connected to the outer wall near one end of the rotating rod 203 through the bevel gear, the outer wall of the top of the transmission threaded tube 301 is rotationally connected to the inner wall of the transmission fixed block 302, and the bottom of the transmission fixed block 302 is fixedly connected to the top of the aluminum alloy extension arm 101 near the front, the back of the transmission fixed block 302 is fixedly connected to the front of the transmission support plate 303, and the bottom of the transmission support plate 303 is fixedly connected to the top of the aluminum alloy extension arm 101 near the front, and limiting through holes are respectively provided on the top near both sides of the transmission fixed block 302, and the rotation of the rotating rod 203 drives the transmission threaded tube 301 to rotate through the bevel gear.

[0029] In this embodiment, Figure 1 、 Figure 2 、 Figure 3、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7 As shown, the outer wall of the lifting threaded rod 401 is threadedly connected to the inner wall of the transmission threaded tube 301, and the top of the lifting threaded rod 401 is fixedly connected to the bottom of the middle part of the lifting top plate 402, and the bottom of the lifting top plate 402 near both sides is fixedly connected to the top of the two lifting limit rods 403, and the outer walls of the two lifting limit rods 403 are movably connected to the inner walls of the two limit through holes, respectively. The rotating transmission threaded tube 301 through hole thread action and the limiting action of the lifting limit rod 403 drive the lifting threaded rod 401 to move upward, and the upward movement of the lifting threaded rod 401 drives the lifting top plate 402 to move upward.

[0030] In this embodiment, Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7 As shown, the bottom of the laser mounting seat 501 is movably engaged with the bottom of the lifting top plate 402, and the top of the laser mounting seat 501 is fixedly connected to the bottom of the laser mounting ring 502. The inner wall of the laser mounting ring 502 is movably engaged with the outer wall of the laser generator 503. The upward movement of the lifting top plate 402 drives the laser mounting seat 501 to move upward. The upward movement of the laser mounting seat 501 drives the laser generator 503 to move upward through the laser mounting ring 502. The upward movement of the laser generator 503 can change the laser measurement point to adapt to different types of subway vehicles, thereby improving the applicability of the device.

[0031] In this embodiment, Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7As shown, the two moving mechanisms 6 each include a moving mounting base 601, a steel support 602 and three mounting bolts 603. A moving through hole is provided on the front of one of the moving mounting bases 601, and the inner wall of the moving through hole is rotatably connected to the outer wall of the other end of the rotating threaded rod 206. The top of the moving mounting base 601 is fixedly connected to the bottom of the steel support 602, and the inner bottom wall of the steel support 602 is respectively provided with three mounting through holes. The inner walls of the three mounting through holes are respectively threadedly connected to the outer walls of the three mounting bolts 603. The front of the other moving mounting base 601 is provided with a threaded through hole, and the threaded through hole The inner wall of the through hole is threadedly connected to the outer wall of the middle part of the rotating threaded rod 206, and the outer walls of the two movable mounting seats 601 are both slidably connected to the inner wall of the sliding groove 102. The rotating rotating threaded rod 206 drives the movable mounting seat 601 to move linearly through the action of the thread and the limiting action of the sliding groove 102. The linear movement of the movable mounting seat 601 can drive the linear movement of the steel support 602 through the installation bolt 603. The linear movement of the steel support 602 can increase the distance between the two steel supports 602. The stability of the aluminum alloy extension arm 101 can be improved by increasing the support area according to different subway vehicle sleepers.

[0032] The use method and advantages of the utility model: When the positioning tool used for leading the base plane of the bolster beam of a subway vehicle to the side beam is in operation, the working process is as follows:

[0033] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7As shown, by starting the rotating motor 202, the rotating rotating motor 202 drives the rotating rod 203 to rotate through the coupling, the rotating rod 203 rotates and drives the transmission threaded tube 301 to rotate through the bevel gear, the rotating transmission threaded tube 301 through the threaded hole and the limiting effect of the lifting limit rod 403 drive the lifting threaded rod 401 to move upward, the lifting threaded rod 401 moves upward and drives the lifting top plate 402 to move upward, the lifting top plate 402 moves upward and drives the laser mounting seat 501 to move upward, the laser mounting seat 501 moves upward and drives the laser generator 503 to move upward through the laser mounting ring 502, the laser generator 503 moves upward to change the laser measurement point to adapt to different types of subway vehicles, thereby improving the application range of the device, pushing the pull ring 104, the pull ring 104 linear motion drives the rotating threaded rod 206 linear motion, The rotating threaded rod 206 with linear motion drives the rotating mounting plate 205 to perform linear motion, and the rotating mounting plate 205 with linear motion drives the connecting square column 204 to perform linear motion in linear motion. The connecting square column 204 linearly moves into the rotating square hole, and drives the connecting square column 204 to rotate through the rotating rotating rod 203. The rotating connecting square column 204 drives the rotating threaded rod 206 to rotate through the rotating mounting plate 205. The rotating rotating threaded rod 206 drives the movable mounting seat 601 to perform linear motion through the thread action and the limiting action of the sliding groove 102. The linear motion of the movable mounting seat 601 can drive the steel support 602 to perform linear motion through the mounting bolt 603. The linear motion of the steel support 602 can increase the distance between the two steel supports 602. The stability of the aluminum alloy extension arm 101 can be improved by increasing the support area according to different subway vehicle sleepers.

[0034] The above shows and describes the basic principles, main features, and advantages of the present invention. Persons skilled in the art should understand that the present invention is not limited to the above-described embodiments. The above-described embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A positioning fixture for leading the base plane of a subway car bolster to a side beam, comprising a base (1), characterized in that: The front side of the base (1) is fixedly connected to the back side of the rotating mechanism (2); the rotating mechanism (2) is composed of a motor mounting seat (201), a rotating motor (202), a rotating rod (203), a connecting square column (204), a rotating mounting plate (205), a rotating threaded rod (206) and a rotating fixed block (207); the outer wall of the rotating mechanism (2) near one end is transmission-connected to the outer wall of the bottom end of the transmission mechanism (3); the transmission mechanism (3) includes a transmission threaded tube (301), a transmission fixed block (302) and a transmission abutment plate (303); the bottom of the transmission mechanism (3) is movably engaged with the top of the front side of the base (1); The inner wall of the transmission mechanism (3) is threadedly connected to the outer wall of the lifting mechanism (4); the lifting mechanism (4) is composed of a lifting threaded rod (401), a lifting top plate (402) and two lifting limit rods (403); the top of the lifting mechanism (4) is movably connected to the bottom of the laser mechanism (5); the laser mechanism (5) includes a laser mounting seat (501), a laser mounting ring (502) and a laser generator (503); the outer wall of the middle part of the rotating mechanism (2) is threadedly connected to the inner walls of the two moving mechanisms (6), and the outer walls of the two moving mechanisms (6) are slidably connected to the inner wall of the base (1).

2. A positioning fixture for extending the reference surface of a subway vehicle bolster to a side beam according to claim 1, characterized in that: The base (1) comprises an aluminum alloy extension arm (101), a sliding groove (102), a nylon positioning shaft (103) and a pull ring (104); the sliding groove (102) is provided at the top of the middle portion of the aluminum alloy extension arm (101); the top of the aluminum alloy extension arm (101) near the back is fixedly connected to the bottom of the nylon positioning shaft (103); the back of the aluminum alloy extension arm (101) is movably abutted against the front of the pull ring (104); the front of the middle portion and the back of the middle portion of the aluminum alloy extension arm (101) are respectively provided with rotation through holes; and the top of the aluminum alloy extension arm (101) near the front is provided with a connection through hole.

3. The positioning tool for extending the reference surface of the bolster to the side beam of a subway vehicle according to claim 2, characterized in that: The back of the motor mounting seat (201) is fixedly connected to the front of the aluminum alloy extension arm (101), and the top of the motor mounting seat (201) is movably connected to the bottom of the rotating motor (202), one end of the rotating motor (202) is fixedly connected to one end of the rotating rod (203) through a coupling, and a rotating square hole is provided on the back of the rotating rod (203), the inner wall of the rotating square hole is slidably connected to the outer wall of the connecting square column (204), and the back of the connecting square column (204) is fixedly connected to the front of the rotating mounting plate (205), and the back of the rotating mounting plate (205) is fixedly connected to the rotating threaded rod ( The front of the rotating rod (206) is fixedly connected, and the outer wall of the rotating threaded rod (206) near the other end is rotatably connected to the inner wall of one of the rotating through holes, the outer wall of one end of the rotating rod (203) is rotatably connected to the inner wall of the other rotating through hole, and the outer wall of the rotating threaded rod (206) near the middle is rotatably connected to the inner wall of the rotating fixed block (207), the bottom of the rotating fixed block (207) is movably engaged with the inner bottom wall of the sliding groove (102), and a bevel gear is provided on the outer wall of the rotating rod (203) near one end, and the other end of the rotating threaded rod (206) is fixedly connected to the front of the pull ring (104).

4. The positioning tool for extending the reference surface of the bolster to the side beam of a subway vehicle according to claim 3, characterized in that: The outer wall of the bottom end of the transmission threaded tube (301) is provided with a bevel gear, and the outer wall of the bottom end of the transmission threaded tube (301) is transmission-connected to the outer wall of the rotating rod (203) near one end through the bevel gear, the outer wall of the top of the transmission threaded tube (301) is rotationally connected to the inner wall of the transmission fixed block (302), and the bottom of the transmission fixed block (302) is fixedly connected to the top of the aluminum alloy extension arm (101) near the front, the back of the transmission fixed block (302) is fixedly connected to the front of the transmission support plate (303), and the bottom of the transmission support plate (303) is fixedly connected to the top of the aluminum alloy extension arm (101) near the front, and the transmission fixed block (302) is respectively provided with limited through holes near the top of both sides.

5. The positioning tool for extending the reference surface of the bolster to the side beam of a subway vehicle according to claim 4, characterized in that: The outer wall of the lifting threaded rod (401) is threadedly connected to the inner wall of the transmission threaded tube (301), and the top of the lifting threaded rod (401) is fixedly connected to the bottom of the middle part of the lifting top plate (402). The bottom of the lifting top plate (402) near both sides is respectively fixedly connected to the top of the two lifting limit rods (403), and the outer walls of the two lifting limit rods (403) are respectively movably connected to the inner walls of the two limit through holes.

6. The positioning tool for extending the reference surface of the bolster to the side beam of a subway vehicle according to claim 5, characterized in that: The bottom of the laser mounting seat (501) is movably engaged with the bottom of the lifting top plate (402), and the top of the laser mounting seat (501) is fixedly connected to the bottom of the laser mounting ring (502), and the inner wall of the laser mounting ring (502) is movably engaged with the outer wall of the laser generator (503).

7. The positioning tool for extending the reference surface of the bolster to the side beam of a subway vehicle according to claim 3, characterized in that: The two moving mechanisms (6) each include a moving mounting seat (601), a steel support (602) and three mounting bolts (603), wherein a moving through hole is provided on the front of one of the moving mounting seats (601), and the inner wall of the moving through hole is rotatably connected to the outer wall of the other end of the rotating threaded rod (206), the top of the moving mounting seat (601) is fixedly connected to the bottom of the steel support (602), and the inner bottom wall of the steel support (602) is respectively provided with three mounting through holes, the inner walls of the three mounting through holes are respectively threadedly connected to the outer walls of the three mounting bolts (603), the front of the other moving mounting seat (601) is provided with a threaded through hole, and the inner wall of the threaded through hole is threadedly connected to the outer wall of the middle part of the rotating threaded rod (206), and the outer walls of the two moving mounting seats (601) are both slidably connected to the inner wall of the sliding groove (102).

Images