Railway construction range finder

Abstract

The utility model provides a railway construction distance measuring instrument, which belongs to the technical field of railway construction equipment, and comprises a wheel type distance measuring instrument, a left auxiliary supporting assembly and a right auxiliary supporting assembly, the wheel type distance measuring instrument is provided with a handle rod, a frame body and a distance measuring wheel, and the left auxiliary supporting assembly is connected to one side of the frame body, is positioned on one side of a steel rail and is used for abutting against one side part of the steel rail in a rolling manner; the right auxiliary supporting assembly is connected to the other side of the frame body, located on the other side of the steel rail and used for abutting against the other side of the steel rail in a rolling mode. When the wheel type range finder is pushed to advance and measure distance, the left auxiliary supporting assembly and the right auxiliary supporting assembly are both used for abutting against the two sides of the steel rail in a rolling mode, so that the steel rail is clamped, and the wheel type range finder is prevented from falling off from the steel rail. The railway construction distance measuring instrument provided by the utility model has the technical effects that the railway construction distance measuring instrument cannot fall off from a steel rail, the distance measuring wheel moves stably, and the measuring precision and efficiency are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of railway construction equipment, and more specifically relates to a railway construction distance measuring instrument. Background Art

[0002] Railway construction refers to the process of carrying out various construction, maintenance, renovation, and commissioning activities on railway lines. The operations include building new railway lines, building railway platforms, replacing rail sleepers, installing signal equipment and electrification equipment, as well as cleaning the roadbed, repairing drainage systems, maintaining vehicles and mechanical equipment, etc. Railway construction operations involve railway traffic safety. Detailed planning and preparation are required before any operation. During railway construction operations, different forms of distance meters are often used, such as laser distance meters and wheel distance meters, so as to measure the installation spacing of road tracks and the length of railway rails. However, the width of railway rails is relatively narrow. When using a wheel distance meter to measure, the distance meter often falls off the rail when pushing the distance meter forward for measurement, and needs to be re-measured or intermittently measured, which not only affects the measurement accuracy, but also makes the measurement time-consuming and labor-intensive.

[0003] Although there are improvements on wheel distance meters in the prior art, when they are used to measure the length of rails, the positioning effect on the rails is poor and they will still fall off the rails during the advancement of the measurement, thus affecting the measurement accuracy and efficiency. Utility Model Content

[0004] The utility model aims to provide a railway construction distance meter, aiming to solve the technical problem that when a wheel distance meter is used to measure the length of a rail, the distance meter may fall off the rail, thus affecting the measurement accuracy and efficiency.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a railway construction distance measuring instrument, comprising:

[0006] The wheel-type distance meter comprises a handle bar, a frame and a distance measuring wheel, wherein the distance measuring wheel is used to roll in contact with the upper end of the rail and roll along the length direction of the rail to measure the length of the rail;

[0007] A left auxiliary support assembly is connected to one side of the frame and is located on one side of the rail, and is used for rolling against one side of the rail;

[0008] A right auxiliary support assembly is connected to the other side of the frame and is located on the other side of the rail, and is used for rolling against the other side of the rail;

[0009] When the wheeled distance meter is pushed forward and measures distance, the left auxiliary support assembly and the right auxiliary support assembly are used to roll against both sides of the rail to form a clamp for the rail and prevent the wheeled distance meter from falling off the rail.

[0010] In a possible implementation, the left auxiliary support assembly and the right auxiliary support assembly both include:

[0011] A support member connected to the side of the frame;

[0012] The roller is hinged to the lower end of the support member, the roller is used to roll against the side of the rail, the support member is used to support the roller, and the angle of the roller after rotation relative to the support member can be limited.

[0013] In a possible implementation, the left auxiliary support assembly and the right auxiliary support assembly further include:

[0014] The support part includes an upper clamp body and a lower clamp body which are hinged to each other, the upper end of the upper clamp body is hinged to the lower end of the support member, and the lower clamp body is located below the upper clamp body. The same ends of the upper clamp body and the lower clamp body are hinged to each other and combined to form a semi-closed structure. The upper clamp body and the lower clamp body are both provided with mounting holes, and rotating shafts are passed through the two mounting holes at the same time. The roller is located between the upper clamp body and the lower clamp body, and the rotating shaft passes through the roller and is coaxially arranged with the roller. A top screw for locking and fixing the rotating shaft is passed through the upper clamp body or the lower clamp body.

[0015] In a possible implementation, a tension spring is connected between the upper clamp body and the lower clamp body, and the two ends of the tension spring are respectively connected to the inner wall of the upper clamp body and the inner wall of the lower clamp body. The tension spring is used to pull the upper clamp body and the lower clamp body to rotate toward each other so as to clamp and fix the rotating shaft.

[0016] In a possible implementation, the support member includes:

[0017] The upper end of the slide rail is fixedly connected to the side of the frame and is arranged horizontally;

[0018] A slider, slidably connected to the lower end of the slide rail, the slider has a sliding freedom along the length direction of the slide rail, and the position of the slider after sliding can be limited;

[0019] A telescopic column is arranged vertically, with an upper end connected to the slider and a lower end hinged to the roller, the telescopic column has a vertical telescopic freedom, and the length of the telescopic column after telescoping can be limited;

[0020] Wherein, the horizontal position of the roller is adjusted by means of the sliding of the slider, and the height of the roller is adjusted by means of the extension and retraction of the telescopic column.

[0021] In a possible implementation, the support member includes:

[0022] A first rod, one end of which is hinged to the side of the frame and the other end is a free end, the first rod has a degree of freedom of rotation around the hinge with the frame, and the position of the first rod after rotation relative to the frame can be limited;

[0023] A second rod, one end of which is hinged to the other end of the first rod and the other end of which is used to hinge to the roller, and the position of the second rod after rotation relative to the first rod can be limited;

[0024] Wherein, the position of the roller is adjusted by means of the rotation of the first rod and the rotation of the second rod.

[0025] In a possible implementation, a cleaning assembly is detachably connected to the side of the frame, and the cleaning assembly is used to clean the upper end surface of the rail. Along the forward direction of the wheel-type distance meter, the cleaning assembly is located in front of the distance measuring wheel.

[0026] In a possible implementation, the cleaning component includes:

[0027] A telescopic rod, one end of which is connected to the side of the frame body and has the freedom to telescope in the horizontal direction and in the vertical direction;

[0028] The upper end of the broom is connected to the other end of the telescopic rod, and the broom is used to contact the upper end of the rail and clean the dust or garbage on the upper end of the rail.

[0029] In a possible implementation, the telescopic rod includes:

[0030] A first telescopic rod is arranged horizontally, one end of which is detachably connected to the side of the frame, and the first telescopic rod has a degree of freedom of telescoping in a horizontal direction;

[0031] The second telescopic rod is vertically arranged, and the upper end is connected to the other end of the first telescopic rod. The second telescopic rod has vertical telescopic freedom, and the upper end of the broom is hinged to the lower end of the second telescopic rod.

[0032] In a possible implementation, the handle rod includes a foldable handle rod connected to the frame at one end and a handle disposed at an upper end of the handle rod.

[0033] The utility model provides a railway construction distance meter with the following beneficial effects: compared with the prior art, the utility model provides a railway construction distance meter including a wheeled distance meter, a left auxiliary support assembly and a right auxiliary support assembly; the wheeled distance meter has a handle bar, a frame and a distance measuring wheel; the distance measuring wheel is used for rolling contact with the upper end of the rail and rolling along the length direction of the rail to measure the length of the rail; the left auxiliary support assembly is connected to one side of the frame and is located on one side of the rail, and is used for rolling contact with one side of the rail; the right auxiliary support assembly is connected to the other side of the frame and is located on the other side of the rail. One side is located at the other side of the rail and is used for rolling and abutting the other side of the rail; wherein, when the wheeled distance meter is pushed forward and measures the distance, the left auxiliary support assembly and the right auxiliary support assembly are both used for rolling and abutting the two sides of the rail to form a clamp on the rail and prevent the wheeled distance meter from falling off the rail, thus solving the technical problem that when the wheeled distance meter is used to measure the length of the rail, the distance meter will fall off the rail and affect the measurement accuracy and efficiency, and has the technical effect of not falling off the rail, the distance measuring wheel moving stably, and improving the measurement accuracy and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 A schematic diagram of the structure of a railway construction distance meter provided by an embodiment of the utility model (the structure at the bottom represents the rail);

[0036] Figure 2 A schematic structural diagram of a railway construction distance meter provided by another embodiment of the utility model;

[0037] Figure 3 A schematic diagram of the main structure of a left auxiliary support assembly of a railway construction distance meter provided by an embodiment of the utility model;

[0038] Figure 4 for Figure 3 The structure diagram of a left auxiliary support assembly of a railway construction distance meter after the roller is removed;

[0039] Figure 5 A schematic diagram of the side structure of a railway construction distance meter provided by another embodiment of the utility model;

[0040] Figure 6 for Figure 5 Schematic diagram of the cleaning component structure.

[0041] Description of reference numerals:

[0042] 1. wheeled distance meter; 11. handle bar; 111. handle bar; 112. handle; 12. frame; 13. distance measuring wheel;

[0043] 2. Left auxiliary support assembly; 21. Support member; 211. Slide rail; 212. Slider; 213. Telescopic column; 214. First rod; 215. Second rod; 22. Roller; 23. Support part; 231. Upper clamping body; 232. Lower clamping body; 233. Mounting hole; 234. Rotating shaft; 235. Top screw; 236. Tension spring;

[0044] 3. Right auxiliary support assembly;

[0045] 4. Cleaning assembly; 41. Telescopic rod; 411. First telescopic rod; 412. Second telescopic rod; 42. Broom. DETAILED DESCRIPTION

[0046] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0047] Please also read Figures 1 to 6 Now, a railway construction distance meter provided by the utility model is described. The railway construction distance meter comprises a wheeled distance meter 1, a left auxiliary support assembly 2 and a right auxiliary support assembly 3. The wheeled distance meter 1 has a handle bar 11, a frame 12 and a distance measuring wheel 13. The distance measuring wheel 13 is used for rolling contact with the upper end of the rail and rolling along the length direction of the rail to measure the length of the rail; the left auxiliary support assembly 2 is connected to one side of the frame 12 and is located on one side of the rail, and is used for rolling against one side of the rail; the right auxiliary support assembly 3 is connected to the other side of the frame 12 and is located on the other side of the rail, and is used for rolling against the other side of the rail; wherein, when the wheeled distance meter 1 is pushed forward and measures the distance, the left auxiliary support assembly 2 and the right auxiliary support assembly 3 are both used for rolling against both sides of the rail to form a clamp on the rail and prevent the wheeled distance meter 1 from falling off the rail.

[0048] The utility model provides a railway construction distance meter. Compared with the prior art, the left auxiliary support assembly 2 and the right auxiliary support assembly 3 are respectively arranged on both sides of the wheel distance meter 1, so that the wheel distance meter 1 can stably move and measure distance on the rail without falling off the rail, thereby improving stability, solving the technical problem that when the wheel distance meter 1 is used to measure the length of the rail, the distance meter will fall off the rail, thereby affecting the measurement accuracy and efficiency. The utility model has the technical effect that the distance meter will not fall off the rail, the distance measuring wheel 13 moves stably, and the measurement accuracy and efficiency are improved.

[0049] The wheeled distance meter 1 used in this embodiment is a distance measuring device in the prior art. By rolling the distance measuring wheel 13 on the upper end surface of the rail, the length of the rail can be measured. The left auxiliary support assembly 2 and the right auxiliary support assembly 3 are both detachably connected to the frame 12. When measuring distance, they are installed on the frame 12, and when not measuring distance, they can be removed. According to actual use requirements, the left auxiliary support assembly 2 or the right auxiliary support assembly 3 can be used, or both can be used.

[0050] In some embodiments, see Figures 1 to 6 The left auxiliary support assembly 2 and the right auxiliary support assembly 3 both include a support member 21 and a roller 22. The support member 21 is connected to the side of the frame 12. The roller 22 is hinged to the lower end of the support member 21. The roller 22 is used to roll against the side of the rail. The support member 21 is used to support the roller 22. The angle of the roller 22 after rotating relative to the support member 21 can be limited. The support member 21 plays a role in supporting the roller 22, and does not hinder the rolling of the roller 22 on the side wall of the rail. By arranging the rollers 22 on both sides of the rail, the rail can be clamped, that is, the running stability of the measuring wheel 13 can be improved. When the measuring wheel 13 moves or rolls, the two rollers 22 also roll and rotate at the same time. First, the friction between the measuring wheel 13 and the rail can be reduced, and second, the stable movement of the measuring wheel 13 can be ensured. In this embodiment, the roller 22 is arranged horizontally and is always in rolling contact with the side wall of the rail.

[0051] In some embodiments, see Figures 1 to 6The left auxiliary support assembly 2 and the right auxiliary support assembly 3 also include a support portion 23, and the support portion 23 includes an upper clamp body 231 and a lower clamp body 232 which are hinged to each other. The upper end of the upper clamp body 231 is hinged to the lower end of the support member 21, and the lower clamp body 232 is located below the upper clamp body 231. The same ends of the upper clamp body 231 and the lower clamp body 232 are hinged to each other and combined to form a semi-closed structure. The upper clamp body 231 and the lower clamp body 232 are both provided with mounting holes 233, and a rotating shaft 234 is simultaneously passed through the two mounting holes 233. The roller 22 is located between the upper clamp body 231 and the lower clamp body 232, and the rotating shaft 234 passes through the roller 22 and is coaxially arranged with the roller 22. A top screw 235 for locking and fixing the rotating shaft 234 is passed through the upper clamp body 231 or the lower clamp body 232. The limiting of the roller 22 refers to the screws provided on the upper clamp body 231. By screwing the screws, the roller 22 can be screwed onto the support member 21, so that the position of the upper clamp body 231 is limited or positioned, and the position of the roller 22 is also limited. The upper clamp body 231 and the lower clamp body 232 are combined to form a C-shaped structure, which plays a role in supporting the roller 22 and preventing the roller 22 from falling. In this embodiment, the roller 22 is not in contact with the upper clamp body 231 and the lower clamp body 232, and can rotate and roll freely. By screwing the top screw 235, the inner end of the top screw 235 can abut against the rotating shaft 234, and the rotating shaft 234 is limited and fixed at this time, and the roller 22 can rotate on the rotating shaft 234. With the length direction of the rail as the axis of symmetry, the left auxiliary support assembly 2 and the right auxiliary support assembly 3 are arranged symmetrically.

[0052] To facilitate installation of the rotating shaft 234 and the roller 22, in some embodiments, refer to Figures 1 to 6 A tension spring 236 is connected between the upper clamp body 231 and the lower clamp body 232. The two ends of the tension spring 236 are connected to the inner wall of the upper clamp body 231 and the inner wall of the lower clamp body 232 respectively. The tension spring 236 is used to pull the upper clamp body 231 and the lower clamp body 232 to rotate in a direction close to each other so as to clamp and fix the rotating shaft 234. The tension spring 236 can mainly pull the lower clamp body 232 to rotate, which is convenient for installing the rotating shaft 234. The upper end of the rotating shaft 234 is first passed through the upper clamp body 231 and then through the lower clamp body 232. Under the action of the tension spring 236, the lower clamp body 232 can actively be sleeved on the rotating shaft 234, so it is convenient to install the rotating shaft 234. The upper clamp body 231 and the lower clamp body 232 are arranged in a symmetrical shape up and down.

[0053] In some embodiments, see Figures 1 to 6The support member 21 includes a slide rail 211, a slider 212 and a telescopic column 213. The upper end of the slide rail 211 is fixedly connected to the side of the frame 12 and is arranged horizontally. The slider 212 is slidably connected to the lower end of the slide rail 211. The slider 212 has the freedom to slide along the length direction of the slide rail 211, and the position of the slider 212 after sliding can be limited. The telescopic column 213 is arranged vertically, with the upper end connected to the slider 212 and the lower end hinged to the roller 22. The telescopic column 213 has the freedom to extend and retract vertically, and the length of the telescopic column 213 after extension can be limited. The horizontal position of the roller 22 is adjusted by the sliding of the slider 212, and the height of the roller 22 is adjusted by the extension of the telescopic column 213. A screw is inserted into the slider 212. By screwing the screw, the inner end of the screw can abut against the slide rail 211, and the slider 212 can be fixed on the slide rail 211. The telescopic column 213 in this embodiment is a product in the prior art, which can be freely extended and adjusted in length, and the length after extension can be limited. The lower end surface of the slide rail 211 is a position or part where the slider 212 can slide.

[0054] As an alternative embodiment of the support member 21, please refer to Figure 2 The support member 21 includes a first rod 214 and a second rod 215, one end of the first rod 214 is hinged to the side of the frame 12, and the other end is a free end. The first rod 214 has a degree of freedom of rotation around the hinge with the frame 12, and the position of the first rod 214 after rotation relative to the frame 12 can be limited, that is, a screw is provided on the first rod 214, and the screw can be screwed with the frame 12, so that the first rod 214 can be limited; one end of the second rod 215 is hinged to the other end of the first rod 214, and the other end is used to hinge the roller 22, and the second rod 215 can be limited relative to the position of the first rod 214 after rotation; wherein the position of the roller 22 is adjusted by means of the rotation of the first rod 214 and the rotation of the second rod 215, and a screw is also provided on the second rod 215, and by screwing the screw, the screw can be screwed on the first rod 214, thereby limiting the position of the second rod 215. The height of the roller 22 can be adjusted by rotating the first rod 214, and the height of the roller 22 can also be adjusted by rotating the second rod 215 or cooperating with the rotation of the first rod 214. Compared with the above-mentioned embodiment of the support member 21, the height adjustment range of the support member 21 of this embodiment is limited, but it can also be adjusted. It should be noted that the position or posture after adjustment of the second rod 215 and the first rod 214 can be positioned or limited, so that the position or height of the roller 22 can be locked. Regardless of the adjustment method, the rolling contact between the roller 22 and the side of the rail must be ensured during distance measurement. In this embodiment, the length of the first rod 214 and the length of the second rod 215 are not limited.

[0055] In order to improve the accuracy of rail distance measurement and avoid dust or garbage affecting the distance measurement operation, in some embodiments, refer to Figures 1 to 6The cleaning assembly 4 is detachably connected to the side of the frame 12. The cleaning assembly 4 is used to clean the upper end surface of the rail. Along the forward direction of the wheel-type distance meter 1, the cleaning assembly 4 is located in front of the distance measuring wheel 13. That is, the surface of the rail is first cleaned by using the cleaning assembly 4, and then the distance measuring wheel 13 is used to measure the distance. In this way, the distance measuring wheel 13 can be prevented from contacting with garbage or dust, etc., and the distance measurement accuracy can be improved. After cleaning the rail, the stability of the rail vehicle operation can also be improved.

[0056] In some embodiments, see Figures 1 to 6 The cleaning assembly 4 includes a telescopic rod 41 and a broom 42. One end of the telescopic rod 41 is connected to the side of the frame 12, and has the freedom to extend and retract in the horizontal direction and the vertical direction. The upper end of the broom 42 is connected to the other end of the telescopic rod 41, and the broom 42 is used to contact the upper end of the rail and clean the dust or garbage on the upper end of the rail. The telescopic rod 41 in this embodiment can be extended and retracted along its axial direction, and then the cleaning height and horizontal position of the broom 42 can be adjusted to reasonably control the cleaning force of the rail.

[0057] In some embodiments, see Figures 1 to 6 The telescopic rod 41 includes a first telescopic rod 411 and a second telescopic rod 412. The first telescopic rod 411 is arranged horizontally, and one end of the first telescopic rod 411 is detachably connected to the side of the frame body 12. The first telescopic rod 411 has the freedom to telescope in the horizontal direction; the second telescopic rod 412 is arranged vertically, and the upper end is connected to the other end of the first telescopic rod 411. The second telescopic rod 412 has the freedom to telescope in the vertical direction. The upper end of the broom 42 is hinged to the lower end of the second telescopic rod 412. The telescopic rod 41 in this embodiment is a product of the prior art, and the length after telescoping can be limited. By reasonably adjusting the length of the first telescopic rod 411 and the second telescopic rod 412, the cleaning position of the broom 42 can be adjusted, and then the dust or garbage on the rail can be cleaned, so as to improve the cleanliness of the rail and improve the accuracy of measuring the length of the rail.

[0058] Preferably, the right end of the first telescopic rod 411 is detachably connected to the slide rail 211 or the frame 12, and the upper end of the second telescopic rod 412 is connected to the lower end surface of the left end of the first telescopic rod 411. No matter how the first telescopic rod 411 and the second telescopic rod 412 are adjusted, the broom 42 is always in contact with the upper end surface of the rail.

[0059] In some embodiments, see Figures 1 to 6 The handle bar 11 includes a foldable handle bar 111 connected to the frame 12 at one end and a handle 112 disposed at the upper end of the handle bar 111. The handle bar 11111 used in this embodiment can be folded, so that it can save space. It can be folded when not in use and unfolded when in use for easy handholding to push the wheeled rangefinder 1 to move.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A railway construction distance meter, characterized in that: include: The wheel-type distance meter comprises a handle bar, a frame and a distance measuring wheel, wherein the distance measuring wheel is used to roll in contact with the upper end of the rail and roll along the length direction of the rail to measure the length of the rail; A left auxiliary support assembly is connected to one side of the frame and is located on one side of the rail, and is used for rolling against one side of the rail; A right auxiliary support assembly is connected to the other side of the frame and is located on the other side of the rail, and is used for rolling against the other side of the rail; When the wheeled distance meter is pushed forward and measures distance, the left auxiliary support assembly and the right auxiliary support assembly are used to roll against both sides of the rail to form a clamp for the rail and prevent the wheeled distance meter from falling off the rail.

2. A railway construction distance measuring instrument as claimed in claim 1, characterized in that: The left auxiliary support assembly and the right auxiliary support assembly both include: A support member connected to the side of the frame; The roller is hinged to the lower end of the support member, the roller is used to roll against the side of the rail, the support member is used to support the roller, and the angle of the roller after rotation relative to the support member can be limited.

3. A railway construction distance measuring instrument as claimed in claim 2, characterized in that: The left auxiliary support assembly and the right auxiliary support assembly further include: The support part includes an upper clamp body and a lower clamp body which are hinged to each other, the upper end of the upper clamp body is hinged to the lower end of the support member, and the lower clamp body is located below the upper clamp body. The same ends of the upper clamp body and the lower clamp body are hinged to each other and combined to form a semi-closed structure. The upper clamp body and the lower clamp body are both provided with mounting holes, and rotating shafts are passed through the two mounting holes at the same time. The roller is located between the upper clamp body and the lower clamp body, and the rotating shaft passes through the roller and is coaxially arranged with the roller. A top screw for locking and fixing the rotating shaft is passed through the upper clamp body or the lower clamp body.

4. A railway construction distance measuring instrument as claimed in claim 3, characterized in that: A tension spring is connected between the upper clamp body and the lower clamp body, and two ends of the tension spring are respectively connected to the inner wall of the upper clamp body and the inner wall of the lower clamp body. The tension spring is used to pull the upper clamp body and the lower clamp body to rotate towards each other so as to clamp and fix the rotating shaft.

5. A railway construction distance measuring instrument as claimed in claim 2, characterized in that: The support member comprises: The upper end of the slide rail is fixedly connected to the side of the frame and is arranged horizontally; A slider, slidably connected to the lower end of the slide rail, the slider has a sliding freedom along the length direction of the slide rail, and the position of the slider after sliding can be limited; A telescopic column is arranged vertically, with an upper end connected to the slider and a lower end hinged to the roller, the telescopic column has a vertical telescopic freedom, and the length of the telescopic column after telescoping can be limited; Wherein, the horizontal position of the roller is adjusted by means of the sliding of the slider, and the height of the roller is adjusted by means of the extension and retraction of the telescopic column.

6. A railway construction distance measuring instrument as claimed in claim 2, characterized in that: The support member comprises: A first rod, one end of which is hinged to the side of the frame and the other end is a free end, the first rod has a degree of freedom of rotation around the hinge with the frame, and the position of the first rod after rotation relative to the frame can be limited; A second rod, one end of which is hinged to the other end of the first rod and the other end of which is used to hinge to the roller, and the position of the second rod after rotation relative to the first rod can be limited; Wherein, the position of the roller is adjusted by means of the rotation of the first rod and the rotation of the second rod.

7. A railway construction distance measuring instrument as claimed in claim 1, characterized in that: The side of the frame is detachably connected with a cleaning assembly, which is used to clean the upper end surface of the rail. Along the forward direction of the wheel-type distance meter, the cleaning assembly is located in front of the distance measuring wheel.

8. A railway construction distance measuring instrument as claimed in claim 7, characterized in that: The cleaning assembly comprises: A telescopic rod, one end of which is connected to the side of the frame body and has the freedom to telescope in the horizontal direction and in the vertical direction; The upper end of the broom is connected to the other end of the telescopic rod, and the broom is used to contact the upper end of the rail and clean the dust or garbage on the upper end of the rail.

9. A railway construction distance measuring instrument as claimed in claim 8, characterized in that: The telescopic rod comprises: A first telescopic rod is arranged horizontally, one end of which is detachably connected to the side of the frame, and the first telescopic rod has a degree of freedom of telescoping in a horizontal direction; The second telescopic rod is vertically arranged, and the upper end is connected to the other end of the first telescopic rod. The second telescopic rod has vertical telescopic freedom, and the upper end of the broom is hinged to the lower end of the second telescopic rod.

10. A railway construction distance measuring instrument as claimed in claim 1, characterized in that: The handle bar comprises a foldable handle bar connected to the frame at one end and a handle arranged at the upper end of the handle bar.

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