Adjustable lofting device suitable for track base precision lofting

Abstract

The present application relates to the technical field of track laying base mark lofting, and discloses an adjustable lofting device suitable for precise lofting of a track laying base mark; the adjustable lofting device comprises a sector plate, the horizontal angle of the sector plate is adjusted by rotating a threaded sleeve or an adjusting shaft, the top of the sector plate is provided with a transverse level and a longitudinal level arranged in a transverse direction, the inner end of a moving rod is arranged in a guide rail groove and is connected with a lead screw, and a nut is connected to the lead screw; the moving rod is driven to move in the guide rail groove by rotating the nut, the swing rod is swung, the hinge sleeve drives the mark end plane to move, the horizontal position of the sector plate is controlled with high precision by the three threaded sleeves and the adjusting shaft in cooperation with the transverse level and the longitudinal level, the moving rod is driven by the nut to control the swing rod to control the forward and backward movement and the left and right movement of the lofting rod and the prism to achieve precise positioning, the base mark of the track laying is accurately and quickly lofted to a position without the need for releveling, and the lofting process can be completed at one time without the need for gradual approximation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of track laying base mark lofting, in particular to an adjustable lofting device suitable for precise lofting of track laying base marks. BACKGROUND

[0002] In recent years, with the rapid development of metro and light rail transportation in China, the requirement for safe running of trains is getting higher and higher, which puts forward higher requirements for track laying precision. Therefore, accurate measurement and setting of track laying base marks are the basic links to ensure high-precision construction and maintenance of metro tracks. In addition, track laying base marks are high in precision, difficult to set and heavy in workload. Therefore, efficient and accurate completion of track laying control base mark measurement and setting is the key to the smooth progress of track laying work.

[0003] However, the precision and operation convenience of the centering rod and prism used for measurement and setting cannot meet the requirements of measurement and setting precision and speed, resulting in low measurement and setting precision, slow speed, large amount of line adjustment work, and even inability to adjust back through line adjustment. SUMMARY

[0004] The purpose of the present application is to provide an adjustable lofting device suitable for precise lofting of track laying base marks, aiming to solve the problem of low lofting precision in the prior art.

[0005] The present application is implemented as follows: an adjustable lofting device suitable for precise lofting of track laying base marks, comprising a sector plate, the inner end of the sector plate has a center position, the center position coincides with the center position of the sector plate, the outer end of the sector plate has two side positions on both sides, the center position and the two side positions are arranged in a triangular shape, and the outer end of the sector plate has a circular arc wall; the center position and the two side positions are respectively provided with a threaded large hole, and the threaded large hole penetrates the sector plate from top to bottom;

[0006] A threaded sleeve that rotates along the threaded large hole from top to bottom is arranged in the threaded large hole, the threaded sleeve is threadedly connected with the threaded large hole, the lower part of the threaded sleeve penetrates the bottom of the sector plate and extends below the sector plate, a threaded small hole is arranged in the threaded sleeve, the threaded small hole penetrates the threaded sleeve from top to bottom, an adjusting shaft that rotates along the threaded small hole from top to bottom is arranged in the threaded small hole, the adjusting shaft is threadedly connected with the threaded small hole, the lower part of the adjusting shaft penetrates the bottom of the threaded sleeve to form an abutting section below the threaded sleeve and abutting against the base mark pier; the horizontal angle of the sector plate is adjusted by rotating the threaded sleeve or the adjusting shaft;

[0007] A transverse level and a longitudinal level are arranged on the top of the sector plate, a level bubble is arranged in each of the transverse level and the longitudinal level, and the transverse level and the longitudinal level are arranged vertically.

[0008] Two sides of the sector plate are respectively provided with guide rail grooves, and the two guide rail grooves are arranged at intervals; inner ends of the guide rail grooves are closed, outer ends of the guide rail grooves penetrate the circular arc wall; a moving rod is arranged in the guide rail groove, the inner end of the moving rod is arranged in the guide rail groove, and a lead screw is connected to the moving rod, the outer end of the moving rod extends to the outer wall of the circular arc wall to form an extended section; a nut is connected to the lead screw, the bottom of the nut abuts against the bottom of the guide rail groove, and the top of the nut penetrates the sector plate upwards and is exposed at the top of the sector plate;

[0009] An oscillating rod is hinged to the extended section, the outer end of the oscillating rod is hinged to the extended section, the inner ends of the two oscillating rods are hinged through a hinge sleeve, and the hinge sleeve penetrates the inner ends of the two oscillating rods respectively; a guide hole is arranged in the hinge sleeve, and the guide hole penetrates the hinge sleeve up and down; a lofting rod is arranged in the guide hole and is threadedly connected with the guide hole; a prism is arranged at the top of the lofting rod, and the bottom of the lofting rod has a marking end that points to the base marker and marks the base marker position;

[0010] By rotating the nut, the moving rod is driven to move in the guide rail groove, and the oscillating rod is driven to oscillate, so that the hinge sleeve drives the marking end to move in a plane.

[0011] Further, the transverse level and the longitudinal level are arranged at intervals, and the longitudinal level is arranged opposite to the middle part of the transverse level.

[0012] Further, the pitch of the large threaded hole is greater than the pitch of the small threaded hole.

[0013] Further, the bottom of the guide rail groove is provided with a downwardly recessed lower arc-shaped groove, the bottom of the nut is movably embedded in the lower arc-shaped groove, and the inner side wall of the lower arc-shaped groove abuts against the two sides of the nut to limit the axial movement of the nut along the guide rail groove.

[0014] Further, an upper arc-shaped groove is arranged in the sector plate, the upper arc-shaped groove penetrates the top of the sector plate and is connected to the guide rail groove from top to bottom, the top of the nut is movably arranged in the upper arc-shaped groove and is exposed at the top of the sector plate.

[0015] Further, the inner side wall of the upper arc-shaped groove abuts against the two sides of the nut to limit the circumferential movement of the nut along the guide rail groove.

[0016] Further, the outer periphery of the hinge sleeve is provided with hinge ring grooves arranged at intervals upward and downward, and the inner ends of the oscillating rods are formed with elastic hinge ends; the hinge ends of the two oscillating rods are respectively sleeved on the outer periphery of the hinge sleeve and are movably embedded in the two hinge ring grooves respectively.

[0017] Further, the articulated sleeve has a spacing section between the two swing rods, and a resilient middle sleeve is arranged on the spacing section along the outer periphery of the spacing section;

[0018] The articulated end has a rotating end face facing the middle sleeve, and the end of the middle sleeve forms a fixed end face which is in movable abutment with the rotating end face.

[0019] When the articulated sleeve rotates with the swing of the swing rod, the middle sleeve rotates with the articulated sleeve, the fixed end face is relatively misaligned with the rotating end face, and a friction force for buffering the rotation of the articulated sleeve is generated.

[0020] Further, the articulated end is provided with an articulated through hole through which the articulated sleeve movably passes, and an anti-deformation metal cylinder is covered on the inner side wall of the articulated through hole, the metal cylinder surrounds the outer periphery of the articulated sleeve and is in rotating connection with the articulated sleeve.

[0021] Further, the rotating end face is recessed away from the fixed end face to form an outer groove ring embedded in the articulated end, and the outer groove ring is arranged around the outer periphery of the spacing section; the fixed end face is recessed away from the rotating end face to form an inner groove ring embedded in the middle sleeve, and the inner groove ring is arranged around the outer periphery of the spacing section.

[0022] The outer groove ring and the inner groove ring are oppositely connected in communication, and a movable sleeve is arranged between the middle sleeve and the articulated end, one end of the movable sleeve is movably arranged in the outer groove ring, and the other end of the movable sleeve is movably arranged in the inner groove ring.

[0023] The middle part of the middle sleeve and the outer periphery of the spacing section have a deformation gap, and the two ends of the middle sleeve are respectively fixed on the outer periphery of the spacing section.

[0024] Compared with the prior art, the adjustable lofting device for precise lofting of track base marks provided by the present application can control the horizontal position of the sector plate with high precision by three threaded sleeves, an adjusting shaft, a transverse level and a longitudinal level, and can precisely position the lofting rod and the prism by driving the moving rod with a nut and then driving the swing rod, so that the track base mark can be precisely and quickly lofted without the need for re-leveling, and the lofting process can be completed at one time without the need for gradual approximation, thereby solving the problem of low lofting precision. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a top view structural schematic diagram of the adjustable lofting device for precise lofting of track base marks provided by the present application;

[0026] Figure 2 is a side view cutaway structural schematic diagram of the adjustable lofting device for precise lofting of track base marks provided by the present application Figure One;

[0027] Figure 3 is the side view cut structure schematic of the adjustable lofting device for track laying base precise lofting provided by the application Figure Two ;

[0028] Figure 4 is the cut structure schematic of the hinged sleeve, middle sleeve and hinged end provided by the application.

[0029] In the figure: sector plate 100, threaded sleeve 200, adjusting shaft 300, transverse level 400, longitudinal level 500, moving rod 600, swinging rod 700, hinged sleeve 800, middle sleeve 900, threaded large hole 101, guide rail groove 102, lower arc groove 103, upper arc groove 104, threaded small hole 201, abutting section 301, screw rod 601, nut 602, hinged end 701, metal cylinder 702, outer groove ring 703, lofting rod 801, prism 802, interval section 803, marking end 804, inner groove ring 901, movable sleeve 902. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application, and are not used to limit the present application.

[0031] The implementation of the present application is described in detail below in combination with specific examples.

[0032] The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present application, it should be understood that if the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right" and the like are based on the orientations or positional relationships shown in the drawings, they are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationships in the drawings are only used for exemplary illustration, and cannot be understood as a limitation on the present application, for those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0033] Referring to Figures 1-4 , the preferred embodiment provided by the present application is shown.

[0034] The adjustable lofting device suitable for track laying base mark precision lofting includes a sector plate 100, the inner end of the sector plate 100 has a center position, the center position coincides with the center position of the sector plate 100, the outer end of the sector plate 100 has two side positions on both sides, the center position and the two side positions are arranged in a triangular shape, and the outer end of the sector plate 100 has a circular arc wall.

[0035] A threaded sleeve 200 is arranged in the threaded large hole 101 and rotates along the threaded large hole 101, the threaded sleeve 200 is in threaded connection with the threaded large hole 101, the lower part of the threaded sleeve 200 penetrates through the bottom of the sector plate 100 and extends below the sector plate 100, a threaded small hole 201 is arranged in the threaded sleeve 200 and penetrates through the threaded sleeve 200, an adjusting shaft 300 is arranged in the threaded small hole 201 and rotates along the threaded small hole 201, the adjusting shaft 300 is in threaded connection with the threaded small hole 201, the lower part of the adjusting shaft 300 penetrates through the bottom of the threaded sleeve 200 and forms an abutting section 301 below the threaded sleeve 200 and abutting on the base mark pier, and the horizontal angle of the sector plate 100 is adjusted by rotating the threaded sleeve 200 or the adjusting shaft 300.

[0036] A transverse level 400 and a longitudinal level 500 are arranged on the top of the sector plate 100, the transverse level 400 and the longitudinal level 500 are arranged in a transverse and longitudinal manner, and the transverse level 400 and the longitudinal level 500 are arranged in a vertical manner.

[0037] Two guide grooves 102 are arranged on both sides of the sector plate 100 and are arranged in a spaced manner, the inner end of the guide groove 102 is closed, the outer end of the guide groove 102 penetrates through the circular arc wall, a moving rod 600 is arranged in the guide groove 102, the inner end of the moving rod 600 is arranged in the guide groove 102 and is connected with a lead screw 601, the outer end of the moving rod 600 extends to the outer wall of the circular arc wall and forms an extension section, a nut 602 is connected to the lead screw 601, the bottom of the nut 602 abuts on the bottom of the guide groove 102, the top of the nut 602 penetrates through the sector plate 100 and is exposed on the top of the sector plate 100.

[0038] Swing rods 700 are hingedly connected to the extension section, the outer end of the swing rod 700 is hingedly connected to the extension section, the inner end of the two swing rods 700 is hingedly connected through a hinge sleeve 800, the hinge sleeve 800 penetrates through the inner end of the two swing rods 700, a guide hole is arranged in the hinge sleeve 800 and penetrates through the hinge sleeve 800 in an up-down manner, a lofting rod 801 is arranged in the guide hole and is in threaded connection with the guide hole, a prism 802 is arranged on the top of the lofting rod 801, and a marking end 804 is arranged on the bottom of the lofting rod 801 and points to the base mark pier and marks the base mark position.

[0039] By rotating the nut 602, the driving moving rod 600 is moved in the guide rail groove 102, the swing rod 700 is swung, and the hinged sleeve 800 drives the marking end 804 to move in the plane.

[0040] The adjustable lofting device provided above is suitable for track laying base standard precise lofting. The horizontal positions of the sector plate 100 are controlled with high precision by three threaded sleeves 200, an adjusting shaft 300, a transverse level 400 and a longitudinal level 500. The moving rod 600 is driven by the nut 602, and the swing rod 700 is controlled to move the lofting rod 801 and the prism 802 forward, backward, leftward and rightward to accurately position, so that the track laying base standard reaches the precise and rapid lofting position without the need for releveling. The lofting process can be completed at one time without gradual approach, and the problem of low lofting precision is solved.

[0041] The transverse level 400 and the longitudinal level 500 are arranged at intervals, and the longitudinal level 500 is arranged opposite to the middle part of the transverse level 400. In this way, the horizontal positions of the sector plate 100 can be accurately adjusted, and the problem of low horizontal precision of the circular bubble is solved by using the level bubble.

[0042] The pitch of the threaded large hole 101 is greater than the pitch of the threaded small hole 201. The level bubble positions in the transverse level 400 and the longitudinal level 500 can be roughly adjusted by moving the threaded sleeve 200 up and down in the threaded large hole 101, and the horizontal position of the level bubble is accurately adjusted by the adjusting shaft 300, so that the sector plate 100 is in the accurate horizontal position.

[0043] The bottom of the guide rail groove 102 is provided with a downwardly recessed lower arc-shaped groove 103, the bottom of the nut 602 is movably embedded in the lower arc-shaped groove 103, and the inner side wall of the lower arc-shaped groove 103 abuts against both sides of the nut 602 to limit the axial movement of the nut 602 along the guide rail groove 102. In this way, when the nut 602 is moved by rotating the control screw 601 to drive the moving rod 600 to move, the nut 602 can be prevented from deviating to cause deviation of the movement of the lofting rod 801.

[0044] The sector plate 100 is provided with an upper arc-shaped groove 104, the upper arc-shaped groove 104 penetrates through the top of the sector plate 100 and is connected to the guide rail groove 102 from top to bottom, the top of the nut 602 is movably embedded in the upper arc-shaped groove 104 and exposed at the top of the sector plate 100. In this way, the rotation of the nut 602 can be directly manually controlled by the top of the nut 602, so that the nut 602 accurately controls the swing of the swing rod 700 driven by the moving rod 600, and the marking end 804 is moved in the plane to the lofting point by the hinged sleeve 800.

[0045] The inner wall of the upper arc groove 104 abuts against both sides of the nut 602, restricting the nut 602 from moving circumferentially along the guide groove 102; in this way, it can be avoided that when the nut 602 moves by rotating the control screw 601 to drive the moving rod 600, the nut 602 will deviate and cause the lofting rod 801 to move.

[0046] In this embodiment, the outer periphery of the hinge sleeve 800 is provided with hinge ring grooves arranged at intervals, and the inner end of the swing rod 700 forms an elastic hinge end 701; the hinge ends 701 of the two swing rods 700 are respectively sleeved on the outer periphery of the hinge sleeve 800, and are respectively movably embedded in the two hinge ring grooves.

[0047] The swing rod 700 is sleeved on the hinge ring groove in the hinge sleeve 800 through the hinge end 701, so that the two swing rods 700 will not affect each other during the swinging process and will not damage the hinge sleeve 800.

[0048] In this embodiment, the hinged sleeve 800 has a spacer section 803 located between two swing rods 700, and an elastic central sleeve 900 is provided on the spacer section 803. The central sleeve 900 is arranged around the outer periphery of the spacer section 803.

[0049] The hinge end 701 has a rotating end face facing the middle sleeve 900, and the end of the middle sleeve 900 forms a fixed end face, which movably abuts against the rotating end face.

[0050] When the hinged sleeve 800 rotates with the swing of the swing rod 700, the middle sleeve 900 rotates with the hinged sleeve 800, and the fixed end face and the rotating end face are misaligned, generating a frictional force to buffer the rotation of the hinged sleeve 800.

[0051] As the hinged sleeve 800 rotates with the swing of a swing rod 700, the middle sleeve 900 rotates with the hinged sleeve 800, while the rotating end face of the other hinged end 701 is fixed by another swing rod 700. The frictional resistance generated between the rotating end face of the other hinged end 701 and the fixed end face of the rotating middle sleeve 900 by the fixing force of the other swing rod 700 buffers the hinged sleeve 800 and increases the protection of the hinged sleeve 800 during movement.

[0052] In this embodiment, the hinge end 701 is provided with a hinge through hole through which the hinge sleeve 800 moves. The inner sidewall of the hinge through hole is covered with a deformation-resistant metal cylinder 702. The metal cylinder 702 surrounds the outer periphery of the hinge sleeve 800 and is rotatably connected to the hinge sleeve 800.

[0053] The metal cylinder 702 makes the inner wall of the hinge end 701 less prone to deformation and also improves the deformation recovery of the hinge end 701, thereby improving the protection of the hinge end 701 by the metal cylinder 702.

[0054] In this embodiment, the rotating end face is recessed away from the fixed end face to form an outer groove ring 703 embedded in the hinge end 701, and the outer groove ring 703 is arranged around the outer periphery of the interval segment 803; the fixed end face is recessed away from the rotating end face to form an inner groove ring 901 embedded in the middle sleeve 900, and the inner groove ring 901 is arranged around the outer periphery of the interval segment 803.

[0055] The outer groove ring 703 and the inner groove ring 901 are directly opposite and connected. A movable sleeve 902 is provided between the middle sleeve 900 and the hinge end 701. One end of the movable sleeve 902 is movably placed in the outer groove ring 703, and the other end of the movable sleeve 902 is movably placed in the inner groove ring 901.

[0056] There is a deformation gap between the middle part of the middle sleeve 900 and the outer periphery of the interval section 803, and the two ends of the middle sleeve 900 are respectively fixed to the outer periphery of the interval section 803.

[0057] The movable sleeve 902 increases the connection between the rotating end face and the fixed end face, so that the middle sleeve 900 and the hinge end 701 can be further buffered and protected by the movable sleeve 902, and the deformation recovery force of the middle sleeve 900 and the hinge end 701 can be improved.

[0058] During the rotation of the hinged sleeve 800, the two ends of the middle sleeve 900 drive the two movable sleeves 902 to rotate respectively, which causes elastic deformation on the outer surface of the hinge end 701 and the middle part of the middle sleeve 900, thereby improving the buffer protection of the hinged sleeve 800.

[0059] 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 within the protection scope of the present invention.

Claims

1. An adjustable stakeout device suitable for precise stakeout of track laying benchmarks, characterized in that, The system includes a fan-shaped plate, the inner end of which has a center point that coincides with the center of the fan-shaped plate. The outer ends of the fan-shaped plate each have side portions, and the center point and the two side portions are arranged in a triangle. The outer ends of the fan-shaped plate have arc-shaped walls. The center point and the two side portions are each provided with threaded large holes, which penetrate the fan-shaped plate vertically. A threaded sleeve, which rotates up and down along the large threaded hole, is threadedly connected to the large threaded hole, and its lower part passes through the bottom of the sector plate, extending to the bottom of the sector plate. A small threaded hole is provided in the threaded sleeve, penetrating both vertically through it. An adjusting shaft, which rotates up and down along the small threaded hole, is threadedly connected to the small threaded hole, and its lower part passes through the bottom of the threaded sleeve, forming an abutment section located below the threaded sleeve and abutting against the base plate. The horizontal angle of the sector plate can be adjusted by rotating the threaded sleeve or the adjusting shaft. The top of the sector plate is provided with a horizontally arranged horizontal level and a vertical level, and each of the horizontal and vertical levels is provided with a level bubble. The horizontal level and the vertical level are arranged perpendicularly. The sector plate has guide rail grooves on both sides, with the two guide rail grooves arranged alternately. The inner end of the guide rail groove is closed, and the outer end of the guide rail groove penetrates the arc wall. A moving rod is provided in the guide rail groove, with the inner end of the moving rod placed in the guide rail groove and connected to a lead screw. The outer end of the moving rod extends to the outer wall of the arc wall, forming an extension section. A nut is connected to the lead screw, with the bottom of the nut abutting against the bottom of the guide rail groove and the top of the nut facing upwards penetrating the sector plate and exposed at the top of the sector plate. A swing rod is hinged to the extension section, the outer end of the swing rod is hinged to the extension section, and the inner ends of the two swing rods are hinged through a hinge sleeve, which passes through the inner ends of the two swing rods respectively; the hinge sleeve has a guide hole, which passes through the hinge sleeve from top to bottom; a lofting rod passes through the guide hole, and the lofting rod is threaded to the guide hole; the top of the lofting rod has a prism, and the bottom of the lofting rod has a marking end that points to the base marker and marks the position of the base marker; By rotating the nut, the moving rod is driven to move in the guide groove, which in turn causes the swing rod to swing, so that the hinged sleeve drives the marking end plane to move.

2. The adjustable stakeout device for precise stakeout of track laying benchmarks as described in claim 1, characterized in that, The horizontal level and the vertical level are arranged at intervals, with the vertical level facing the center of the horizontal level.

3. The adjustable stakeout device for precise stakeout of track laying benchmarks as described in claim 2, characterized in that, The pitch of the large threaded hole is greater than the pitch of the small threaded hole.

4. The adjustable stakeout device for precise stakeout of track laying benchmarks as described in claim 1, characterized in that, The bottom of the guide rail groove is provided with a downward-facing concave lower arc-shaped groove. The bottom of the nut is movably embedded in the lower arc-shaped groove. The inner sidewall of the lower arc-shaped groove abuts against both sides of the nut, restricting the nut from moving axially along the guide rail groove.

5. The adjustable stakeout device for precise stakeout of track laying benchmarks as described in claim 4, characterized in that, The sector plate has an upper arc groove that penetrates the top of the sector plate and connects to the guide rail groove from top to bottom. The top of the nut is movably inserted through the upper arc groove and exposed on the top of the sector plate.

6. The adjustable stakeout device for precise stakeout of track laying benchmarks as described in claim 5, characterized in that, The inner wall of the upper arc-shaped groove abuts against both sides of the nut, restricting the nut from moving circumferentially along the guide groove.

7. The adjustable stakeout device for precise stakeout of track laying benchmarks as described in any one of claims 1 to 6, characterized in that, The outer periphery of the hinge sleeve is provided with hinge ring grooves arranged at intervals, and the inner end of the swing rod forms an elastic hinge end; the hinge ends of the two swing rods are respectively sleeved on the outer periphery of the hinge sleeve and respectively movably embedded in the two hinge ring grooves.

8. The adjustable stakeout device for precise stakeout of track laying benchmarks as described in claim 7, characterized in that, The hinged sleeve has a gap section located between two swing rods, and the gap section is provided with an elastic central sleeve, which is arranged around the outer periphery of the gap section. The hinge end has a rotating end face facing the central sleeve, and the end of the central sleeve forms a fixed end face, which movably abuts against the rotating end face. When the hinged sleeve rotates with the swinging rod, the middle sleeve rotates with the hinged sleeve, and the fixed end face and the rotating end face are misaligned, generating a frictional force to buffer the rotation of the hinged sleeve.

9. The adjustable stakeout device for precise stakeout of track laying benchmarks as described in claim 8, characterized in that, The hinge end is provided with a hinge through hole for the hinge sleeve to move through. The inner wall of the hinge through hole is covered with a deformation-resistant metal cylinder. The metal cylinder surrounds the outer circumference of the hinge sleeve and is rotatably connected to the hinge sleeve.

10. The adjustable stakeout device for precise stakeout of track laying benchmarks as described in claim 8, characterized in that, The rotating end face is recessed away from the fixed end face to form an outer groove ring embedded in the hinge end, and the outer groove ring is arranged around the outer periphery of the interval section; the fixed end face is recessed away from the rotating end face to form an inner groove ring embedded in the middle sleeve, and the inner groove ring is arranged around the outer periphery of the interval section. The outer groove ring and the inner groove ring are directly opposite and connected. A movable sleeve is provided between the middle sleeve and the hinge end. One end of the movable sleeve is movably placed in the outer groove ring, and the other end of the movable sleeve is movably placed in the inner groove ring. There is a deformation gap between the middle part of the middle sleeve and the outer periphery of the interval section, and the two ends of the middle sleeve are respectively fixed to the outer periphery of the interval section.

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