Monorail vehicle for measuring length of steel rail

By designing rail length measurement monorail vehicles, using multi-directional adjustment hand rods and adjustment mechanisms to ensure stable contact between the rail wheels and the rails, the problem of low efficiency and accuracy of existing measurement methods is solved, and higher measurement accuracy and portability are achieved.

CN222845303UActive Publication Date: 2025-05-09HEBEI JIANTOU RAILWAY CO LTD
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Patent Information

Application Number
CN202421730246.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-07-22
Publication Date
2025-05-09
Estimated Expiration
2034-07-22

AI Technical Summary

Technical Problem

The existing rail length measurement methods have problems with low measurement efficiency and accuracy, especially manual measurement and wheeled rolling rangefinders are prone to slip when rolling on the top of the rail smooth rail, resulting in data deviation.

Method used

A single-rail vehicle with rail length measurement is designed, using a multi-directional adjustment hand rod and adjustment mechanism. The rail wheel rolls on the upper end face of the rail rail, restricting the wheel rolls on the lower end face of the rail top to ensure the stable contact between the rail wheel and the rail, and the number of turns of the rail wheel is recorded through the counter and the rail length is calculated.

Benefits of technology

Improves the accuracy of measurement data, reduces operation difficulty, enhances portability, and facilitates transfer.

✦ Generated by Eureka AI based on patent content.

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    Figure CN222845303U_ABST
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Abstract

The utility model discloses a monorail vehicle for measuring the length of a steel rail, which comprises an assembling wheel seat provided with a multidirectional adjusting hand lever, a rail traveling wheel arranged on the assembling wheel seat and rolled on the upper end face of the rail top of the steel rail, and adjusting mechanisms respectively arranged on two sides of the assembling wheel seat. The adjusting mechanism is rotationally connected with at least one limiting wheel, and the limiting wheels are rolled on the lower end face of the corresponding side of the rail top. According to the utility model, the accuracy of measured data can be effectively improved, the operation difficulty is reduced, the portability is improved, and the transfer is convenient. The device is suitable for the technical field of steel rail length measurement in track detection.
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Description

Technical Field

[0001] The utility model belongs to the technical field of track detection, and specifically relates to a rail length measuring monorail vehicle. Background Art

[0002] At present, in the process of maintaining and servicing the rails and recording the track parameters, the length of the rails is one of the essential and important parameters, so it is necessary to measure the rails manually and / or with equipment. When using equipment, a rail vehicle is generally used to control the rail vehicle to move on the rails so that it records the path data of the movement, thereby obtaining the length of the rails; however, the rail vehicle has a complex structure, a large volume, and poor portability. When manual measurement is used, it is generally divided into two types. The first is to manually use measuring tools to measure section by section, so that the measurement efficiency and accuracy are low; the second is to roll a handheld wheeled rolling distance meter on the top of the rail to achieve the purpose of measuring the length of the rail; however, since the top of the rail is relatively smooth, the roller of the wheeled rolling distance meter often slips, resulting in deviations in the measured data. Utility Model Content

[0003] The utility model provides a rail length measuring monorail vehicle, which is used for improving the accuracy of measuring data, reducing the difficulty of operation, improving portability and facilitating transfer.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0005] A rail length measuring monorail vehicle comprises an assembly wheel seat equipped with a multi-directional adjustment handle, a track wheel is mounted on the assembly wheel seat, the track wheel rolls on the upper end surface of the rail top of the rail, and adjustment mechanisms are respectively constructed on both sides of the assembly wheel seat, the adjustment mechanism is rotatably connected to at least one limiting wheel, and the limiting wheel rolls on the lower end surface of the side corresponding to the rail top.

[0006] Furthermore, the track wheel includes a wheel-shaped body, which is coaxially arranged with the first shaft rod and rotatably connected to the first shaft rod, and both ends of the first shaft rod are fixedly connected to the assembly wheel seat; limiting flanges are respectively constructed at both axial ends of the wheel-shaped body, each of the limiting flanges extends radially outward along the wheel-shaped body, and the top of the rail is adapted between the two limiting flanges.

[0007] Furthermore, an anti-skid layer or anti-skid patterns are constructed on the outer peripheral surface of the wheel-shaped body.

[0008] Furthermore, the adjustment mechanism includes a connecting rod connected to the assembly wheel seat, a connecting seat is fixedly connected to the lower end of the connecting rod, at least one connecting arm is connected to the connecting seat, and one end of the connecting arm away from the connecting seat is connected to the limiting wheel rotation.

[0009] Furthermore, the lower end of the connecting rod is movably inserted into the plug sleeve, and a connecting spring is arranged in the plug sleeve. The upper and lower ends of the connecting spring are respectively connected to the connecting rod and the plug sleeve, and the lower end of the plug sleeve is fixed to the upper end of the connecting seat.

[0010] Furthermore, two guide bars are constructed along the circumference of the outer wall of the connecting rod, each of which extends along the axial direction of the connecting rod, and guide grooves are opened on the inner wall of the plug-in sleeve at positions corresponding to each guide bar, each of which extends vertically, and the parts of the guide bars corresponding to the guide grooves are movably assembled in the guide grooves.

[0011] Furthermore, a transmission seat is constructed on the assembly wheel seat, the lower end of the connecting rod movably passes through the transmission seat, and a transmission plate is constructed at the upper end of the connecting rod. The lower end of the transmission screw passes through the transmission plate downward in the vertical direction and is rotatably connected to the transmission seat, and the transmission screw is threadedly connected to the transmission plate, and an operating handwheel is installed at the upper end of the transmission screw.

[0012] Furthermore, there are two connecting arms installed on the connecting seat, and the two connecting arms are connected to the connecting seat through connecting bolts, and a fastening nut is threadedly connected to the connecting bolts; the limiting wheel includes a lower wheel body, and the lower wheel body is coaxially connected to a second shaft rod, and the second shaft rod is rotatably connected to the corresponding connecting arm.

[0013] Furthermore, a magnet is installed in the lower wheel body, or the lower wheel body is a magnetic wheel.

[0014] Furthermore, the multi-directional adjustment hand lever includes a connecting sleeve constructed at the upper end of the assembly wheel seat, the connecting sleeve is rotatably connected to a connecting shaft, a first locking bolt is threadedly connected to the connecting sleeve, an end of the first locking bolt abuts against the outer circumferential wall of the connecting shaft, a connecting flange is constructed at the upper end of the connecting shaft, the connecting flange is fixedly connected to an adapter seat, and a bowl-shaped seat is installed on the side wall of the adapter seat; a joint ball is constructed at one end of the operating hand lever, the joint ball is movably assembled in the bowl-shaped seat, a second locking bolt is threadedly connected to the bowl-shaped seat, and an end of the second locking bolt abuts against the outer circumferential wall of the joint ball; an end of the operating hand lever away from the joint ball is inserted into the outside of the connecting tube, a third locking bolt is threadedly connected to the outside of the connecting tube, an end of the third locking bolt abuts against the outer circumferential surface of the operating hand lever, and an operating handle is installed at the end of the connecting tube away from the assembly wheel seat.

[0015] The utility model adopts the above structure, and the technical progress achieved by the utility model compared with the prior art is that: the detection personnel set the utility model on a single rail, so that the track wheel rolls on the upper end surface of the rail top of the rail, and adjusts the adjustment mechanism so that the limiting wheel rolls on the lower end surface of the rail top, and then manually drives the multi-directional adjustment hand lever to move along the length direction of the rail, so that the track wheel rolls on the rail, and under the restriction of the limiting wheel, it is ensured that the track wheel and the rail do not slide relative to each other, thereby making the detected data more accurate; wherein, the setting of the limiting wheel mainly utilizes the roughness of the lower end surface of the rail top, that is, the lower end surface of the rail top has a certain roughness, compared with the upper end surface of the rail top, it can provide sufficient friction for the limiting wheel to rotate, and at this time the track wheel and the limiting wheel are in a state of clamping the upper and lower end surfaces of the rail top, thereby ensuring that the track wheel and the limiting wheel roll on the rail. The utility model is provided with a counter on the track wheel and / or the limiting wheel to record the number of rotations of the track wheel, and to obtain the circumference according to the radius of the track wheel and / or the limiting wheel. The product of the circumference and the number of rotations is the length of the section of rail being tested. The utility model adopts a multi-directional adjustment handle, and the length and / or the deflection angle of the multi-directional adjustment handle can be adjusted according to the height and habits of the test personnel, so as to avoid the test personnel's work comfort being reduced during the pushing process. After the test is completed, the adjustment mechanism or the limiting wheel is removed, and the multi-directional adjustment handle is put away, thereby improving portability. The utility model can effectively improve the accuracy of the measurement data, reduce the difficulty of operation, improve portability, and facilitate transfer. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0017] In the attached picture:

[0018] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the embodiment of the utility model after the multi-directional adjustment handle is removed;

[0020] Figure 3 This is a schematic diagram of the structure of the track wheel in the embodiment of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the embodiment of the utility model after removing the multi-directional adjustment handle and the track wheel;

[0022] Figure 5 This is a structural schematic diagram of the assembly wheel seat of the embodiment of the utility model connected with the limiting wheel through the adjustment mechanism;

[0023] Figure 6 This is a schematic diagram of the structure of the multi-directional adjustment handle connected to the assembly wheel seat in the embodiment of the utility model;

[0024] Figure 7 It is a schematic diagram of the structure of the multi-directional adjustment handle and the assembly wheel seat after being disassembled according to an embodiment of the utility model.

[0025] Labeled parts: 100-assembly wheel seat, 101-wheel seat body, 102-transmission seat, 103-connecting sleeve, 104-connecting shaft, 105-first locking bolt, 106-connecting flange, 107-adapter seat, 200-track wheel, 201-wheel body, 202-first shaft rod, 203-limiting flange, 300-adjustment mechanism, 301-connecting rod, 302-plug sleeve, 303-guide strip, 304 -transmission plate, 305-connecting seat, 306-connecting arm, 307-connecting bolt, 308-fastening nut, 309-transmission screw, 310-operating hand wheel, 400-limiting wheel, 401-lower wheel body, 402-second shaft rod, 500-multi-directional adjustment hand rod, 501-bowl seat, 502-second locking bolt, 503-joint ball, 504-operating hand rod, 505-connecting pipe, 506-operating handle. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0027] The utility model discloses a rail length measuring monorail vehicle. Figure 1-7As shown, it includes an assembly wheel seat 100, a multi-directional adjustment handle 500, a track wheel 200 and two adjustment mechanisms 300. The multi-directional adjustment handle 500 and the track wheel 200 are respectively mounted on the assembly wheel seat 100, and the track wheel 200 rolls on the upper end surface of the rail top of the rail. The two adjustment mechanisms 300 of the utility model are respectively constructed on both sides of the assembly wheel seat 100, each adjustment mechanism 300 is rotatably connected to at least one limiting wheel 400, and each limiting wheel 400 rolls on the lower end surface of the corresponding side of the rail top. The working principle and advantages of the utility model are as follows: the inspector sets the utility model on a single rail so that the track wheel 200 rolls on the upper end surface of the rail top of the rail, and adjusts the adjustment mechanism 300 so that the limiting wheel 400 rolls on the lower end surface of the rail top, and then manually drives the multi-directional adjustment handle 500 to move along the length direction of the rail, so that the track wheel 200 rolls on the rail, and under the restriction of the limiting wheel 400, it is ensured that the track wheel 200 and the rail do not slide relative to each other, thereby making the detected data more accurate; wherein, the setting of the limiting wheel 400 is mainly to utilize the roughness of the lower end surface of the rail top, that is, the lower end surface of the rail top has a certain roughness, compared with the upper end surface of the rail top, it can provide sufficient friction for the limiting wheel 400 to rotate, and at this time, the track wheel 200 and the limiting wheel 400 are in a state of clamping the upper and lower end surfaces of the rail top, thereby ensuring that the track wheel 200 and the limiting wheel 400 roll on the rail. The utility model is provided with a counter on the track wheel 200 and / or the limiting wheel 400 to record the number of turns of the track wheel 200, and to obtain the circumference according to the radius of the track wheel 200 and / or the limiting wheel 400. The product of the circumference and the number of turns is the length of the section of rail being tested. The utility model adopts a multi-directional adjustment handle 500, so the length and / or the deflection angle of the multi-directional adjustment handle 500 can be adjusted according to the height and habits of the test personnel, so as to avoid the test personnel's work comfort being reduced during the pushing process. After the test is completed, the adjustment mechanism 300 or the limiting wheel 400 is removed, and the multi-directional adjustment handle 500 is put away, thereby improving portability. The utility model can effectively improve the accuracy of the measurement data, reduce the difficulty of operation, improve portability, and facilitate transfer.

[0028] As a preferred embodiment of the present invention, Figure 3As shown, the track wheel 200 includes a wheel-shaped body 201 and a first shaft 202, the axis of the wheel-shaped body 201 coincides with the axis of the first shaft 202, the two ends of the first shaft 202 extend out of the two ends of the wheel-shaped body 201, and the wheel-shaped body 201 is rotatably connected to the first shaft 202, and the two ends of the first shaft 202 are fixedly connected to the assembly wheel seat 100. In this embodiment, the two axial ends of the wheel-shaped body 201 are respectively configured with limiting flanges 203, each limiting flange 203 extends radially outwardly along the wheel-shaped body 201, and the rail top of the rail is adapted between the two limiting flanges 203, so that when the track wheel 200 is running on the rail, the track wheel 200 is prevented from moving obliquely and leaving the rail. In order to increase the friction between the track wheel 200 and the rail top, the present embodiment has an anti-skid layer or anti-skid pattern on the outer peripheral surface of the wheel-shaped body 201. The anti-skid layer or anti-skid pattern has a certain anti-skid effect, but it cannot be completely avoided because the upper end surface of the rail top of the rail is too smooth, so a limiting wheel 400 is needed to assist in preventing slipping.

[0029] As a preferred embodiment of the present invention, Figure 4 , 5 As shown, the adjustment mechanism 300 includes a connecting rod 301 and a connecting seat 305. The connecting rod 301 is connected to the assembly wheel seat 100, and the connecting seat 305 is fixedly installed at the lower end of the connecting rod 301. At least one connecting arm 306 is connected to the connecting seat 305, and one end of each connecting arm 306 away from the connecting seat 305 is rotatably connected to the limiting wheel 400. When multiple connecting arms 306 are installed on the connecting seat 305, the limiting wheels 400 on these connecting arms 306 can make the track wheel 200 fully contact with the upper end surface of the rail top, so as to avoid the situation that the track wheel 200 is separated from the upper end surface of the rail top and causes inaccurate measurement data. In order to make the rail top elastically clamped between the track wheel 200 and the limiting wheel 400, that is, to make the track wheel 200 and the limiting wheel 400 elastically press the rail top, and ensure that the two always keep in contact with the upper end face and the lower end face of the rail top during the travel, the measures taken in this embodiment are as follows: the lower end of the connecting rod 301 of this embodiment is movably inserted into the plug sleeve 302, and a connecting spring is arranged in the plug sleeve 302, and the upper and lower ends of the connecting spring are respectively connected to the connecting rod 301 and the plug sleeve 302, and the lower end of the plug sleeve 302 is fixed to the upper end of the connecting seat 305. In this embodiment, when the limiting wheel 400 abuts against the lower end face of the rail top, the connecting spring is in an elastically stretched state, so that the connecting spring provides an elastic upward pulling force for the connecting seat 305, so that the connecting seat 305 elastically pulls the limiting wheel 400 upward through the connecting arm 306, so that the limiting wheel 400 always elastically abuts against the lower end face of the rail top.

[0030] As a preferred embodiment of the present invention, in order to prevent the connecting rod 301 and the plug sleeve 302 from rotating relative to each other, the measures taken are as follows: Figure 5 As shown, two guide strips 303 are constructed along the circumference of the outer wall of the connecting rod 301, and each guide strip 303 extends along the axial direction of the connecting rod 301. Guide grooves are opened on the inner wall of the plug-in sleeve 302 at positions corresponding to each guide strip 303, and each guide groove extends in the vertical direction. The portion of the guide strip 303 corresponding to the guide groove is movably assembled in the guide groove.

[0031] As a preferred embodiment of the present invention, Figure 5 As shown, the assembly wheel seat 100 includes a wheel seat body 101, a transmission seat 102 is constructed on the wheel-shaped body 201, the lower end of the connecting rod 301 movably passes through the transmission seat 102, and a transmission plate 304 is constructed at the upper end of the connecting rod 301. The lower end of the transmission screw 309 passes through the transmission plate 304 downward in the vertical direction, and the lower end of the transmission screw 309 is rotatably connected with the transmission seat 102, the transmission screw 309 is threadedly connected with the transmission plate 304, and an operating hand wheel 310 is installed at the upper end of the transmission screw 309. In this embodiment, the transmission screw 309 is rotated by rotating the operating hand wheel 310, and the transmission plate 304 is driven to move in the vertical direction. In this way, the transmission plate 304 drives the connection seat 305 to move through the connecting rod 301, so that the connection seat 305 drives the limiting wheel 400 to move in the vertical direction through the connecting arm 306, so as to achieve the purpose of elastically contacting the limiting wheel 400 with the lower end surface of the rail top. In this embodiment, the number of connecting arms 306 installed on each connecting seat 305 is two, and the two connecting arms 306 are connected to the connecting seat 305 by connecting bolts 307, and a fastening nut 308 is threadedly connected to the connecting bolts 307. In this embodiment, the two connecting arms 306 are symmetrically opened at a certain angle, so that the limiting wheel 400 is more stable when abutting against the lower end face of the rail top. The limiting wheel 400 of this embodiment includes a lower wheel body 401, which is connected to a second shaft rod 402, and the axis of the lower wheel body 401 coincides with the axis of the second shaft rod 402, and the second shaft rod 402 is rotatably connected to the corresponding connecting arm 306. In order to further ensure that the lower wheel body 401 and the lower end face of the rail top maintain a continuous abutment state, the measures taken in this embodiment are that a magnet is installed in the lower wheel body 401, or the lower wheel body 401 is a magnetic wheel.

[0032] As a preferred embodiment of the present invention, Figure 6 , 7As shown, the multi-directional adjustment handle 500 includes a connecting sleeve 103 configured at the upper end of the assembly wheel seat 100, the connecting sleeve 103 is rotatably connected to the connecting shaft 104, a first locking bolt 105 is threadedly connected to the connecting sleeve 103, the end of the first locking bolt 105 abuts against the outer peripheral wall of the connecting shaft 104, a connecting flange 106 is configured at the upper end of the connecting shaft 104, and the connecting flange 106 is fixedly connected to the adapter seat 107. In this embodiment, a bowl-shaped seat 501 is installed on the side wall of the adapter seat 107, a joint ball 503 is configured at one end of the operating handle 504, the joint ball 503 is movably assembled in the bowl-shaped seat 501, a second locking bolt 502 is threadedly connected to the bowl-shaped seat 501, and the end of the second locking bolt 502 abuts against the outer peripheral wall of the joint ball 503. In this embodiment, the end of the operating handle 504 away from the joint ball 503 is inserted outside the connecting tube 505, and the third locking bolt is connected to the external thread of the connecting tube 505. The end of the third locking bolt abuts against the outer peripheral surface of the operating handle 504, and the operating handle 506 is installed at the end of the connecting tube 505 away from the assembly wheel seat 100. The working principle and advantages of this embodiment are: in this embodiment, by loosening the first locking bolt 105, the second locking bolt 502 and the third locking bolt respectively, the rotation angle of the connecting shaft 104, the deflection angle of the operating handle 504 and the length of the operating handle 504 extending into the connecting tube 505 are adjusted respectively, so that the angle of the operating handle 504 after adjustment is suitable for the operating habits of the measurement personnel. After the adjustment is completed, the first locking bolt 105, the second locking bolt 502 and the third locking bolt are tightened respectively, so that the angle of the operating handle 504 and the assembly wheel seat 100 is locked.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the scope of protection of the claims of the utility model.

Claims

1. A rail length measuring monorail vehicle, characterized in that: It comprises an assembly wheel seat equipped with a multi-directional adjustment handle, a track wheel is installed on the assembly wheel seat, the track wheel rolls on the upper end surface of the rail top of the rail, and adjustment mechanisms are respectively constructed on both sides of the assembly wheel seat, the adjustment mechanism is rotatably connected to at least one limiting wheel, and the limiting wheel rolls on the lower end surface of the side corresponding to the rail top.

2. A rail length measuring monorail vehicle according to claim 1, characterized in that: The rail wheel includes a wheel-shaped body, which is coaxially arranged with a first shaft rod and rotatably connected to the first shaft rod, and both ends of the first shaft rod are fixedly connected to an assembly wheel seat; limiting flanges are respectively constructed at both axial ends of the wheel-shaped body, each of the limiting flanges extends radially outwardly along the wheel-shaped body, and the rail top of the rail is adapted between the two limiting flanges.

3. A rail length measuring monorail vehicle according to claim 2, characterized in that: An anti-skid layer or anti-skid patterns are constructed on the outer circumferential surface of the wheel-shaped body.

4. A rail length measuring monorail vehicle according to claim 1, characterized in that: The adjustment mechanism includes a connecting rod connected to the assembly wheel seat, a connecting seat is fixedly connected to the lower end of the connecting rod, at least one connecting arm is connected to the connecting seat, and one end of the connecting arm away from the connecting seat is connected to the limiting wheel rotation.

5. A rail length measuring monorail vehicle according to claim 4, characterized in that: The lower end of the connecting rod is movably inserted into the plug sleeve, and a connecting spring is arranged in the plug sleeve. The upper and lower ends of the connecting spring are respectively connected to the connecting rod and the plug sleeve, and the lower end of the plug sleeve is fixed to the upper end of the connecting seat.

6. A rail length measuring monorail vehicle according to claim 5, characterized in that: Two guide bars are constructed on the outer wall of the connecting rod along its circumference, and each guide bar extends along the axial direction of the connecting rod. Guide grooves are opened on the inner wall of the plug-in sleeve at positions corresponding to each guide bar, and each guide groove extends vertically. The guide bar and the corresponding portion of the guide groove are movably assembled in the guide groove.

7. A rail length measuring monorail vehicle according to claim 4, characterized in that: A transmission seat is constructed on the assembly wheel seat, the lower end of the connecting rod movably passes through the transmission seat, and a transmission plate is constructed at the upper end of the connecting rod. The lower end of the transmission screw passes through the transmission plate downward in the vertical direction and is rotatably connected to the transmission seat, and the transmission screw is threadedly connected to the transmission plate, and an operating handwheel is installed at the upper end of the transmission screw.

8. A rail length measuring monorail vehicle according to claim 4, characterized in that: There are two connecting arms installed on the connecting seat, and the two connecting arms are connected to the connecting seat through connecting bolts, and a fastening nut is threadedly connected to the connecting bolts; the limiting wheel includes a lower wheel body, and the lower wheel body is coaxially connected to a second shaft rod, and the second shaft rod is rotatably connected to the corresponding connecting arm.

9. A rail length measuring monorail vehicle according to claim 8, characterized in that: A magnet is installed in the lower wheel body, or the lower wheel body is a magnetic wheel.

10. A rail length measuring monorail vehicle according to claim 1, characterized in that: The multi-directional adjustment hand lever includes a connecting sleeve constructed at the upper end of the assembly wheel seat, the connecting sleeve is rotatably connected to a connecting shaft, a first locking bolt is threadedly connected to the connecting sleeve, an end of the first locking bolt abuts against the outer peripheral wall of the connecting shaft, a connecting flange is constructed at the upper end of the connecting shaft, the connecting flange is fixedly connected to the adapter seat, and a bowl-shaped seat is installed on the side wall of the adapter seat; a joint ball is constructed at one end of the operating hand lever, the joint ball is movably assembled in the bowl-shaped seat, a second locking bolt is threadedly connected to the bowl-shaped seat, and an end of the second locking bolt abuts against the outer peripheral wall of the joint ball; an end of the operating hand lever away from the joint ball is inserted into the outside of the connecting pipe, a third locking bolt is threadedly connected to the outside of the connecting pipe, an end of the third locking bolt abuts against the outer peripheral surface of the operating hand lever, and an operating handle is installed at the end of the connecting pipe away from the assembly wheel seat.