Self-adaptive ramp angle accurate measuring device

Abstract

The invention relates to the technical field of ramp measuring devices, in particular to a self-adaptive ramp angle accurate measuring device which comprises a main shaft and measuring arms, limiting rings are symmetrically installed on the outer wall of the main shaft, and the two measuring arms are rotationally connected to the outer wall of the main shaft in a sleeving mode and abut against the limiting rings. Pointer strips are arranged at the same positions of the inner side walls of the two measuring arms. A horizontal dial is installed on the outer wall of the main shaft and located between the two limiting rings. The horizontal dial is formed by coaxially combining two ring sleeves with the same size, the ring sleeves are fixed through locking bolts, graduated scales are carved on the outer rings of the two ring sleeves, lining pipes are symmetrically installed on the inner side of one ring sleeve, internal thread grooves for tightening the locking bolts are formed in the inner walls of the lining pipes, and a containing area is formed between the two lining pipes located at the lower position. A balancing weight is installed between the two ring sleeves and located in the containing area, and the device can be suitable for measurement of continuous ramps and has the self-adaption characteristic.

Description

Technical Field

[0001] The present invention relates to the technical field of ramp measuring devices, and in particular to an adaptive ramp angle precision measuring device. Background Art

[0002] The ramp measuring device is a device used to measure the inclination of the slope, and is widely used in engineering construction, transportation, logistics, building construction and other fields. It uses specific measurement principles and technical means to quantitatively measure the angle of the ramp, providing key data support for the design, construction, safety assessment of the ramp and the operation of related equipment; The measurement of ramp angles is of great significance in construction, road construction and other construction fields. Traditional ramp angle measurement devices have certain limitations. They can only measure a single ramp in one measurement cycle. This single ramp measurement method cannot meet the needs in some scenarios where a continuous ramp needs to be evaluated as a whole. For example, in the construction of complex mountain roads, there are often continuous ramps. For the slope design, safety assessment and feasibility analysis of vehicle driving, relying only on a single ramp measurement can easily lead to a long measurement cycle and cannot adapt to different ramp measurement requirements.

[0003] Therefore, it is necessary to provide a new adaptive ramp angle precision measurement device to solve the above technical problems. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides an adaptive ramp angle precision measurement device.

[0005] The technical solution adopted by the present invention to solve the technical problem is: an adaptive ramp angle precision measuring device, comprising a main shaft and a measuring arm, the outer wall of the main shaft is symmetrically equipped with a limit ring, the two measuring arms are rotatably sleeved on the outer wall of the main shaft and close to the limit ring, the inner side walls of the two measuring arms are both provided with a pointer bar at the same position, and the outer wall of the main shaft and located between the two limit rings is provided with a horizontal scale plate; The horizontal scale plate is composed of two rings of the same size coaxially combined, the rings are fixed by locking bolts, the outer rings of the two rings are engraved with scales, the inner side of one of the rings is symmetrically installed with an inner liner tube, the inner wall of the inner liner tube is provided with an internal thread groove for tightening the locking bolt, and the lower position between the two inner liner tubes is combined into a placement area, and a counterweight is installed between the two rings and in the placement area; The cross section of the counterweight block is an axisymmetric figure, the vertical line along the center of gravity of the counterweight block and the center line of the ring sleeve are located in the same vertical plane, and the weight of the counterweight block is greater than the total weight of the two ring sleeves; The inner side walls of the two ring sleeves are provided with slots at equal distances along the circumferential direction, rollers are placed in the slots, and the horizontal scale plates are sleeved on the outer wall of the main shaft through the rollers.

[0006] Preferably, the scale is composed of a slope scale and an angle scale.

[0007] Preferably, the outer wall of the main shaft is symmetrically provided with annular grooves, and the outer walls of the two ring sleeves are equipped with locating pins through fixing bolts, the locating pins and the counterweight block are arranged on the same side relative to the ring sleeves, one end of the locating pin is inserted into the annular groove, and the axial symmetry line of the locating pin, the vertical line of the counterweight block along the center of gravity and the center line of the ring sleeve are all located in the same vertical plane.

[0008] Preferably, the outer walls of the two ring sleeves are both equipped with leveling bubbles, and the leveling bubbles are located in the area directly above the counterweight block, and the center lines of the two coincide.

[0009] Preferably, a through hole is opened at the center position inside the main shaft, a pressing block is symmetrically inserted in the through hole, a sliding plate is symmetrically installed on the outer wall of the blind end of the pressing block, a sliding groove is symmetrically opened on the inner wall of the through hole near the end of the main shaft, and the sliding plate is located in the sliding plate, a supporting spring is installed between the sliding plate and the sliding groove, a conical plate is symmetrically arranged on the outer wall of the exposed end of the pressing block, a cross rod is laterally inserted near the end of the conical plate, a supporting disc is welded on the end of the cross rod, and a positioning spring is installed on the outer wall of the cross rod and between the conical plate and the supporting disc.

[0010] Preferably, transverse through holes are symmetrically provided near the center position in the through hole, and a locking block is inserted in the transverse through hole. The end face of the locking block near the transverse through hole is an arc surface and is flush with the outer wall of the main shaft. Sliding rods are symmetrically inserted at both sides of the blind end of the locking block. One end of the sliding rod is fixed to the inner wall of the through hole, and a fixing spring is sleeved on the outer wall of the sliding rod and located between the through hole and the locking block. An extrusion head is installed at the center of the blind end face of the locking block. The end face of the extrusion head is a semicircular surface, and an extrusion block is fixedly installed at the center of the blind end face of the pressing block. The extrusion block is formed by welding a combination of two cylinders of different diameters and a frustum. The frustum is located between the two cylinders, and the outer wall of the small diameter cylinder is close to between the two extrusion heads.

[0011] Preferably, a rectangular groove is provided at the center of the top of each measuring arm, a rotating shaft is inserted horizontally into the inner side of one of the rectangular grooves, and a square strip is installed on the outer wall of the area where the rotating shaft is located in the rectangular groove.

[0012] Preferably, a semicircular chamfer is provided on an end surface of one end of the measuring arm located at the horizontal scale plate, and the diameter of the semicircular chamfer is greater than the diameter of the ring sleeve.

[0013] Preferably, the exposed end surface of the pressing block is provided with a concave arc corner.

[0014] Compared with the related art, the adaptive ramp angle precision measurement device provided by the present invention has the following beneficial effects: The present invention provides an adaptive ramp angle precision measuring device. During measurement, when a measuring arm is attached to a to-be-measured area, no matter how large the angle between the measuring arm and the horizontal plane is, the counterweight block will fall to the bottom of the main axis under the action of its own gravity, and the zero scale of the scale will be stably parallel to the horizontal plane within a certain period of time. At this time, the slope of the to-be-measured area can be measured by visually observing the reading of a pointer bar relative to the scale. This method can be applied to the measurement of a single ramp and two continuous ramps at the same time, and is more practical. The zero scale line of the scale on the horizontal dial can be adaptively adjusted according to different ramps, so that the overall measurement applicability of the ramp is improved and more convenient. At the same time, the level of the level bubble can be visually observed to further confirm whether the horizontal position is reached, thereby further improving the accuracy during measurement.

[0015] The present invention provides an adaptive ramp angle precision measuring device. The measuring personnel of the present invention can visually observe the position of the horizontal bubble. When the horizontal bubble is in the center position, the pressing block can be further pressed to push the truncated cone area of ​​the extrusion block to contact the extrusion head through the pressing block. The truncated cone area applies longitudinal extrusion forces in opposite directions to the two extrusion heads close to it, so that one end of the circular arc surface of the locking block is exposed relative to the horizontal perforation, and the circular arc surface of the locking block directly contacts the inner wall of the ring sleeve to lock the position of the ring sleeve. In this way, the horizontal position of the zero scale line of the scale can be quickly adjusted, and the overall measurement efficiency can be effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of the overall structure of the present invention; Figure 2 It is a side view of the overall structure of the present invention; Figure 3 It is a schematic diagram of the measurement state of the present invention; Figure 4 It is a partial structural exploded diagram of the present invention; Figure 5 It is a partial structural stereogram of the present invention; Figure 6 A sectional view of the main shaft of the present invention; Numbers in the figure: 1. spindle, 2. measuring arm, 3. horizontal dial, 10. annular groove, 11. limit ring, 12. through hole, 13. pressing block, 14. sliding groove, 15. sliding plate, 16. transverse perforation, 17. locking block, 18. sliding rod, 19. extrusion head, 20. pointer bar, 21. rectangular groove, 22. rotating shaft, 23. square strip plate, 31. ring sleeve, 32. scale, 33. liner tube, 34. counterweight, 35. slot, 36. roller, 37. level bubble, 38. positioning pin, 151. support spring, 131. conical plate, 132. cross rod, 133. support disc, 134. positioning spring, 181. fixing spring. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0018] In addition, the terms used below are defined based on the functions of the present invention and may differ depending on the intention or custom of the user or operator. Therefore, these terms are defined based on the entire contents of this specification.

[0019] See also Figure 1-Figure 6 The present invention discloses an adaptive ramp angle precision measuring device, comprising a main shaft 1 and a measuring arm 2. A limit ring 11 is symmetrically installed on the outer wall of the main shaft 1. The two measuring arms 2 are rotatably sleeved on the outer wall of the main shaft 1 and are close to the limit ring 11. A pointer bar 20 is arranged at the same position on the inner wall of the two measuring arms 2. A horizontal scale plate 3 is installed on the outer wall of the main shaft 1 and between the two limit rings 11. Two measuring arms 2 of the same size can measure two different slope areas at the same time. When measuring different slope areas, the two measuring arms 2 are in a relatively expanded state, which can be understood as a deflection angle between the two measuring arms 2. Figure 3 Taking the middle right angle slope as an example, the two unfolded measuring arms 2 are attached to one side of the measuring area, and the measurement can be performed by observing the direction of the pointer bar 20 relative to the horizontal scale plate 3; Similarly, a single slope area can be measured. In this case, there is no deflection angle between the two measuring arms 2. The two can be understood as Figure 1 When measuring, just stick the two measuring arms 2 to the area to be measured; The horizontal scale plate 3 is composed of two ring sleeves 31 of the same size coaxially combined, the ring sleeves 31 are fixed by locking bolts, and the outer rings of the two ring sleeves 31 are engraved with scales 32. An inner liner tube 33 is symmetrically installed on the inner side of one of the ring sleeves 31. The inner wall of the inner liner tube 33 is provided with an internal thread groove for tightening the locking bolt. A placement area is formed between the two inner liner tubes 33 at the lower position. A counterweight block 34 is installed between the two ring sleeves 31 and in the placement area. The ring sleeve 31 can rotate relative to the outer wall of the main shaft 1, and its rotation kinetic energy is provided by the gravity of the counterweight block 34. Wherein, the zero scale line of the scale 32 and the vertical line of the counterweight block 34 along the center of gravity form an angle of 90°; The cross section of the counterweight 34 is axially symmetrical, ensuring that the counterweight 34 is located on the center line along the vertical line of the center of gravity, and the counterweight 34 is located in the same vertical plane as the center line of the ring sleeve 31 along the vertical line of the center of gravity. The weight of the counterweight 34 is greater than the total weight of the two ring sleeves 31. Therefore, during measurement, when the measuring arm 2 is attached to the area to be measured, no matter how large the angle between the measuring arm 2 and the horizontal plane is, the counterweight 34 will fall to the bottom of the main shaft 1 under the action of its own gravity, and the zero scale of the scale 32 will be stable in a position parallel to the horizontal plane for a certain period of time. At this time, the slope of the area to be measured can be measured by visually observing the reading of the pointer bar 20 relative to the scale 32. This method can be applied to the measurement of a single ramp and two continuous ramps at the same time, and is more practical. In addition, the zero scale line of the scale 32 on the horizontal dial 3 can be adaptively adjusted according to different ramps, so that the overall measurement applicability of the ramp is improved and more convenient. The inner walls of the two ring sleeves 31 are provided with slots 35 at equal intervals along the circumferential direction, and rollers 36 are placed in the slots 35, and the horizontal dial 3 is sleeved on the outer wall of the main shaft 1 through the rollers 36. In this state, when the gravity of the counterweight block 34 drives the entire horizontal dial 3 to deflect, the rollers 36 rotate on the outer wall of the main shaft 1, and the friction between the two is rolling friction, which effectively reduces the friction between the horizontal dial 3 and the outer wall of the main shaft 1 when it rotates.

[0020] The scale 32 for convenient visual reading by the surveyor is composed of a slope scale and an angle scale, that is, the slope and angle of the ramp can be recorded simultaneously during the measurement process without secondary calculation.

[0021] In another embodiment, see Figure 4 The outer wall of the main shaft 1 is symmetrically provided with annular grooves 10, and the outer walls of the two ring sleeves 31 are provided with positioning pins 38 through fixing bolts. The positioning pins 38 can be disassembled and installed by loosening and tightening the fixing bolts. Figure 4 The position of the positioning pin 38 in the viewing angle is relatively close to the outer ring position of the ring sleeve 3. In actual practice, the positioning pin 38 should be deflected to the inner ring position of the ring sleeve 3 to ensure that part of the positioning pin 38 is exposed. One end of the locating pin 38 is inserted into the annular groove 10. Specifically, the partially exposed area of ​​the locating pin 38 is located in the annular groove 10, and the axial symmetry line of the locating pin 38, the vertical line along the center of gravity of the counterweight block 34 and the center line of the ring sleeve 31 are all located in the same vertical plane, and the locating pin 38 and the counterweight block 34 are arranged on the same side relative to the ring sleeve 31. When the horizontal dial 3 rotates, the locating pin 38 rotates together in the annular groove 10 to prevent the horizontal dial 3 from axially shifting relative to the main shaft 1. The locating pin 38 can be used to further increase the counterweight and increase the measurement accuracy.

[0022] Further, such as Figure 4 The outer walls of the two ring sleeves 31 are both installed with level bubbles 37, and the level bubbles 37 are located in the area directly above the counterweight block 34, and the center lines of the two coincide. When the zero scale line of the scale 32 is deflected to a position parallel to the horizontal plane by the counterweight block 34, the level of the level bubble 37 can be visually observed to further confirm whether the horizontal position is reached, thereby further improving the accuracy of the measurement.

[0023] In another embodiment, see Figure 1-Figure 6 A through hole 12 is provided at the center of the spindle 1, a pressing block 13 is symmetrically inserted in the through hole 12, a sliding plate 15 is symmetrically installed on the blind end outer wall of the pressing block 13, a sliding groove 14 is symmetrically provided on the inner wall of the through hole 12 near the end of the spindle 1, and the sliding plate 15 is located in the sliding plate 15, and a supporting spring 151 is installed between the sliding plate 15 and the sliding groove 14, and the elastic force of the supporting spring 151 pushes the sliding plate 15 to be located at one end of the sliding groove 14, so that in the initial state, part of the area of ​​the two pressing blocks 13 is exposed on the end surface of the spindle 1; A conical plate 131 is symmetrically arranged on the outer side wall of the exposed end of the pressing block 13, a cross rod 132 is laterally inserted near the end of the conical plate 131, a supporting disc 133 is welded at the end of the cross rod 132, and a positioning spring 134 is installed on the outer wall of the cross rod 132 and between the conical plate 131 and the supporting disc 133. Under normal conditions, the elastic force of the positioning spring 134 pushes the supporting disc 133 to be close to the outer side wall of the measuring arm 2, so that the measuring arm 2 has a certain damping feeling when it rotates relative to the spindle 1. When in the measurement process, When one side of the measuring arm 2 is close to the area to be measured, the measuring personnel can manually press the two pressing blocks 13, and the positioning spring 134 is squeezed by the pressing block 13, so that the positioning spring 134 is partially compressed, and the other end of the positioning spring 134 transmits the squeezing force to the supporting disc 133, and the end surface of the supporting disc 133 is pressed tightly against the outer wall of the measuring arm 2, so that the measuring arm 2 is clamped between the limiting ring 11 and the supporting disc 133, so that the position of the measuring arm 2 is locked twice, and it is not easy to deflect the position, thereby improving the measurement accuracy; When measuring, the measurement personnel can also hold the two pressing blocks 13 (without applying squeezing force thereto) to move the measuring arm 2 close to the area to be measured. Under normal circumstances, the measurement personnel can directly hold the measuring arm 2 and place it on the area to be measured. The different holding positions will not affect the measurement results.

[0024] In another embodiment, see Figure 1-Figure 6 , the through hole 12 is symmetrically provided with transverse through holes 16 near the center, a locking block 17 is inserted into the transverse through hole 16, and the end face of the locking block 17 near the transverse through hole 16 is an arc surface, and sliding rods 18 are symmetrically inserted at both sides of the blind end of the locking block 17, one end of the sliding rod 18 is fixed to the inner wall of the through hole 12, and a fixing spring 181 is sleeved on the outer wall of the sliding rod 18 and located between the through hole 12 and the locking block 17. Under normal conditions, the elastic force of the fixing spring 181 pushes the locking block 17 to move to the end of the sliding rod 18 near the center of the through hole 12, at which time the arc surface of one end of the locking block 17 is flush with the outer wall of the main shaft 1, and the horizontal dial 3 can rotate along the outer wall of the main shaft 1; An extrusion head 19 is installed at the center of the blind end face of the locking block 17. The end face of the extrusion head 19 is a semicircular surface. An extrusion block is fixedly installed at the center of the blind end face of the pressing block 13. The extrusion block is welded by two cylinders with different diameters and a frustum. The frustum is located between the two cylinders, and the outer wall of the small diameter cylinder is close to the two extrusion heads 19. Based on the above, when the measuring arm 2 is positioned for the second time, the measuring personnel can visually observe the position of the bubble of the level bubble 37. When the level bubble 37 is in the center, it can be moved. The pressing block 13 is pressed in one step, and the truncated cone area of ​​the extrusion block is pushed by the pressing block 13 to contact the extrusion head 19. The truncated cone area applies longitudinal extrusion forces in opposite directions to the two extrusion heads 19 close to it, so that one end of the arc surface of the locking block 17 is exposed relative to the transverse through hole 16, and the arc surface of the locking block 17 directly contacts the inner wall of the ring sleeve 31 to lock the position of the ring sleeve 31. In this way, the horizontal position of the zero scale line of the scale 32 can be quickly adjusted, effectively improving the overall measurement efficiency; It should be further explained that when the two pressing blocks 13 are pressed to perform secondary positioning on the measuring arm 2, the maximum feed depth of the pressing block 13 relative to the through hole 12 is not greater than the length of the small-diameter cylinder of the extrusion block. Similarly, the maximum feed depth marking line can be marked on the outer wall of the exposed area of ​​the pressing block 13 to facilitate the operation of the measurement personnel.

[0025] like Figure 5 As shown, a rectangular groove 21 is provided at the center of the top of each measuring arm 2, wherein a rotating shaft 22 is inserted horizontally into the inner side of one of the rectangular grooves 21, and a square strip 23 is installed on the outer wall of the area where the rotating shaft 22 is located in the rectangular groove 21. When measuring a single slope area, the square strip 23 can be rotated to be inserted into the rectangular groove 21 of the other measuring arm 2. At this time, the two measuring arms 2 can be deflected relative to the main shaft 1 as a whole.

[0026] Among them, the end surface of the measuring arm 2 located at one end of the horizontal dial 3 is provided with a semicircular chamfer, and the diameter of the semicircular chamfer is larger than the diameter of the ring sleeve 31, that is, when the horizontal dial 3 is deflected along the main axis 1 under the action of the counterweight block 34 to adjust the horizontal position of the zero scale line of the scale 32, the outer wall of the ring sleeve 31 does not contact the slope of the area to be measured.

[0027] The exposed end surface of the pressing block 13 is provided with an inwardly concave arc corner, which is the gripping area of ​​the pressing block 13 by the measurement personnel, so that the two are not prone to relative sliding.

[0028] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An adaptive ramp angle precision measurement device, comprising a spindle (1) and a measuring arm (2), characterized in that: The outer wall of the spindle (1) is symmetrically mounted with a limit ring (11); the two measuring arms (2) are rotatably sleeved on the outer wall of the spindle (1) and are in close contact with the limit ring (11); a pointer bar (20) is provided at the same position on the inner wall of the two measuring arms (2); and a horizontal scale plate (3) is mounted on the outer wall of the spindle (1) and between the two limit rings (11); The horizontal scale plate (3) is composed of two ring sleeves (31) of the same size coaxially combined, the ring sleeves (31) are fixed by a locking bolt, the outer rings of the two ring sleeves (31) are engraved with a scale (32), an inner liner tube (33) is symmetrically installed on the inner side of one of the ring sleeves (31), and the inner wall of the inner liner tube (33) is provided with an internal thread groove for tightening the locking bolt, and a placement area is formed between the two inner liner tubes (33) at the lower position, and a counterweight block (34) is installed between the two ring sleeves (31) and in the placement area; The cross section of the counterweight block (34) is axially symmetrical, the counterweight block (34) and the center line of the ring sleeve (31) are located in the same vertical plane along the vertical line of the center of gravity, and the weight of the counterweight block (34) is greater than the total weight of the two ring sleeves (31); Slots (35) are provided at equal distances along the circumferential direction on the inner side walls of the two ring sleeves (31), roller shafts (36) are placed in the slots (35), and the horizontal scale plate (3) is sleeved on the outer wall of the main shaft (1) via the roller shaft (36).

2. The adaptive ramp angle precision measurement device according to claim 1, characterized in that: The scale (32) is composed of a slope scale and an angle scale.

3. The adaptive ramp angle precision measurement device according to claim 1, characterized in that: The outer wall of the main shaft (1) is symmetrically provided with annular grooves (10), and the outer walls of the two ring sleeves (31) are provided with positioning pins (38) via fixing bolts. The positioning pins (38) and the counterweight block (34) are arranged on the same side relative to the ring sleeve (31), one end of the positioning pin (38) is inserted into the annular groove (10), and the axisymmetric line of the positioning pin (38), the vertical line along the center of gravity of the counterweight block (34) and the center line of the ring sleeve (31) are all located in the same vertical plane.

4. The adaptive ramp angle precision measurement device according to claim 1, characterized in that: The outer walls of the two ring sleeves (31) are both provided with leveling bubbles (37), and the leveling bubbles (37) are located in the area directly above the counterweight block (34), and the center lines of the two coincide with each other.

5. The adaptive ramp angle precision measurement device according to claim 1, characterized in that: A through hole (12) is provided at a central position inside the main shaft (1), a pressing block (13) is symmetrically inserted into the through hole (12), a sliding plate (15) is symmetrically installed on the blind end outer wall of the pressing block (13), a sliding groove (14) is symmetrically provided on the inner wall of the through hole (12) near the end of the main shaft (1), and the sliding plate (15) is located in the sliding plate (15), a supporting spring (151) is installed between the sliding plate (15) and the sliding groove (14), a conical plate (131) is symmetrically provided on the outer wall of the exposed end of the pressing block (13), a cross rod (132) is transversely inserted near the end of the conical plate (131), a supporting disc (133) is welded to the end of the cross rod (132), and a positioning spring (134) is installed on the outer wall of the cross rod (132) and between the conical plate (131) and the supporting disc (133).

6. The adaptive ramp angle precision measurement device according to claim 5, characterized in that: The through hole (12) is symmetrically provided with transverse through holes (16) near the center, and a locking block (17) is inserted into the transverse through hole (16). The end surface of the locking block (17) near the transverse through hole (16) is an arc surface and is flush with the outer wall of the main shaft (1). Slide rods (18) are symmetrically inserted at the positions on both sides of the blind end of the locking block (17). One end of the slide rod (18) is fixed to the inner wall of the through hole (12), and the outer wall of the slide rod (18) is located at the through hole. A fixing spring (181) is sleeved between the locking block (17), an extrusion head (19) is installed at a central position of the blind end face of the locking block (17), the end face of the extrusion head (19) is a semicircular surface, and an extrusion block is fixedly installed at a central position of the blind end face of the pressing block (13), the extrusion block is formed by welding two cylinders and a truncated cone of different diameters, the truncated cone is located between the two cylinders, and the outer wall of the cylinder with a small diameter is close to between the two extrusion heads (19).

7. The adaptive ramp angle precision measurement device according to claim 1, characterized in that: A rectangular groove (21) is provided at the center of the top of each measuring arm (2), a rotating shaft (22) is inserted transversely into the inner side of one of the rectangular grooves (21), and a square strip plate (23) is installed on the outer wall of the area where the rotating shaft (22) is located in the rectangular groove (21).

8. The adaptive ramp angle precision measurement device according to claim 1, characterized in that: A semicircular chamfer is provided on an end surface of one end of the measuring arm (2) located at the horizontal scale plate (3), and the diameter of the semicircular chamfer is greater than the diameter of the ring sleeve (31).

9. The adaptive ramp angle precision measurement device according to claim 5, characterized in that: The exposed end surface of the pressing block (13) is provided with a concave arc corner.

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