A land planning space topographic flatness measuring device

Abstract

The application discloses a landform flatness measuring device for land planning space, and relates to the technical field of flatness measuring devices.The device comprises a supporting disc, a vertical column fixed on the supporting disc, a steering sleeve rotatably sleeved on the vertical column, a contact wheel rotatably installed at the bottom of an elastic guide assembly, a canvas windingly arranged on winding rollers, a marking pen installed on the elastic guide assembly and used for marking on the canvas.The linear movement of the translation frame relative to the extension frame makes the contact wheel move up and down along with the changes of the landform under the action of the elastic guide assembly, and the marking pen can mark on the canvas, so that the flatness of the landform in a certain direction is measured.The steering sleeve drives the extension frame to rotate, the moving direction of the contact wheel is switched and adjusted, the overall multidirectional landform flatness measurement of the measurement area is facilitated, and the measurement efficiency of the landform flatness is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flatness measurement, and particularly relates to a land planning space topography flatness measurement device. BACKGROUND

[0002] Land space planning is a planning of land in a certain region in space and time, is a guide and blueprint of spatial development, and is a basic basis for various development, protection and construction activities. The flatness detection of land planning land is to evaluate the ups and downs of the land surface, so as to understand the actual situation of the land surface, and facilitate engineers to more accurately formulate planning schemes and ensure the smooth development of the construction process.

[0003] The current land space topography flatness measurement device marks on the canvas by a marker pen following the topography in the measurement process, so as to realize the representation and measurement of the topography flatness condition. However, the existing measurement device cannot switch the position of a specific area in multiple directions, which is not conducive to fully measuring the topography. The canvas cannot be automatically switched during the measurement process, and the operator needs to manually replace the canvas, which is not conducive to improving the operation efficiency of the topography flatness measurement. In view of the above technical defects of the prior art, the present application provides a land planning space topography flatness measurement device to solve the above problems. SUMMARY

[0004] The present application aims to provide a land planning space topography flatness measurement device to solve the problems in the background art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0006] A land planning space topography flatness measurement device, comprising a support disc, a vertical column fixed on the support disc, a steering sleeve rotatably sleeved on the vertical column, an extension frame fixed on the steering sleeve, a positioning stud screwed on the steering sleeve and abutting against the vertical column, a translation frame slidably installed on the extension frame, a guide plate connected to the translation frame through a switching assembly, a fixed plate fixed on the guide plate, an elastic guide assembly installed on the fixed plate, a trolley rotatably installed at the bottom of the elastic guide assembly, a cloth winding roller, a cloth unwinding roller and a guide roller rotatably installed on the extension frame, a canvas wound on the cloth winding roller, the cloth unwinding roller and the guide roller, a marker pen installed on the elastic guide assembly for marking on the canvas, a rotating shaft coaxially fixed on the cloth winding roller and the cloth unwinding roller, a pulley rotatably sleeved on the rotating shaft, a belt transmissionally connected between the two pulleys, the belt being fixedly connected with the translation frame, a one-way drive assembly installed on the pulley, the one-way drive assembly being used for driving the rotating shaft to rotate in one direction, an L-shaped frame fixed on the end of the extension frame, and a stabilizing assembly installed on the L-shaped frame.

[0007] As a further improved scheme of the present application, the translation frame is fixed with a motor, and a walking gear is coaxially fixed on the output shaft of the motor.

[0008] As a further improved scheme of the present application, the elastic guide assembly comprises a lifting frame slidingly sleeved on the guide plate, the touch wheel is rotatably installed on the bottom of the lifting frame, a vertical guide rod is fixed between the lifting frame and the fixed plate, a back-shaped frame is slidingly sleeved on the fixed plate, a vertical spring is fixed between the back-shaped frame and the lifting frame, and an adjusting stud abutting against the fixed plate is rotatably installed on the back-shaped frame.

[0009] As a further improved scheme of the present application, the switching assembly comprises a connecting column slidingly connected with the translation frame, the connecting column is fixed on the guide plate, a traction spring is fixed between the connecting column and the translation frame, a sleeve plate is fixed on the side wall of the translation frame, a double-wedge surface plug is slidingly installed in the sleeve plate, a pushing spring is fixed between the double-wedge surface plug and the sleeve plate, two linearly distributed V-shaped grooves are formed in the side wall of the connecting column, and the double-wedge surface plug is plug-in adapted with the V-shaped grooves.

[0010] As a further improved scheme of the present application, the switching assembly further comprises a parallelogram block fixed on the top of the guide plate, and switching column I and switching column II are respectively fixed at the two ends of the extension frame and horizontally correspond to the parallelogram block.

[0011] As a further improved scheme of the present application, the one-way driving assembly comprises a connecting frame fixed on the bottom of the belt wheel, a transmission outer ring is fixed on the bottom of the connecting frame, a transmission inner ring is concentrically arranged in the transmission outer ring and fixed on the rotating shaft, a wedge block is slidingly installed on the side wall of the transmission inner ring, a radial spring is fixed between the wedge block and the transmission inner ring, and a plurality of wedge grooves are formed in the inner wall of the transmission outer ring and uniformly distributed in a ring shape, and the wedge block is plug-in adapted with the wedge grooves.

[0012] As a further improved scheme of the present application, the one-way driving assembly further comprises an extension block fixed on the extension frame, a sliding rod is slidingly installed on the extension block, a friction pressing block is fixed on the sliding rod and frictionally abuts against the rotating shaft, and a connecting spring is fixed between the friction pressing block and the extension block.

[0013] As a further improved scheme of the present application, the stabilizing assembly comprises a limiting strip plate fixed on the L-shaped frame, a rack I is slidingly sleeved on the limiting strip plate, a positioning plug is fixed on the bottom of the rack I, a U-shaped frame is fixed on the L-shaped frame, and a locking stud abutting against the rack I is threadedly connected with the U-shaped frame.

[0014] As an improved solution of the present invention: the stabilizing assembly also includes a central gear rotatably mounted on the L-shaped frame, the central gear is engaged with the rack I, a vertically arranged rack II is engaged with the central gear, a sliding frame is fixed on the rack II, a guide column is vertically slidably mounted on the sliding frame, a guide wheel is installed at the bottom of the guide column, and a spring coil is fixed between the guide wheel and the sliding frame.

[0015] As an improved solution of the present invention: a vertically arranged backboard is fixed on the translation frame, the backboard and the marking pen are arranged opposite to each other, and the canvas is located between the backboard and the marking pen.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention realizes linear movement of the translation frame relative to the extension frame, so that the tactile wheel can move up and down with the undulations of the terrain under the action of the elastic guide component, and the provided marking pen can mark on the canvas to realize the measurement of the terrain flatness in a certain direction. The steering sleeve drives the extension frame to rotate to realize the switching adjustment of the movement direction of the tactile wheel, which greatly facilitates the comprehensive multi-directional terrain flatness measurement and processing of the measurement area and effectively improves the measurement efficiency of the terrain flatness.

[0018] 2. The switching component provided in the present invention can switch the position of the marking pen, so that after the marking pen moves from one end of the extension frame to the other end and completes marking on the canvas, the marking pen can move away from the canvas when it slides in the opposite direction and resets, realizing the one-way marking of the marking pen on the canvas. At the same time, during the resetting process of the marking pen, the belt is driven to move by the translation frame, and under the action of the one-way driving component, the cloth winding roller automatically winds the canvas, so that the unmarked canvas is automatically spread on the extension frame, which greatly facilitates the marking of the marking pen on the canvas when measuring the flatness in the next direction, and the efficiency of terrain flatness measurement is significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention at a certain viewing angle;

[0020] Figure 2 For the present invention Figure 1 A magnified schematic diagram of part A in the middle;

[0021] Figure 3 It is a structural schematic diagram of the present invention from another perspective;

[0022] Figure 4 It is a schematic diagram of the local structure of the present invention;

[0023] Figure 5 For the present invention Figure 4 Schematic diagram of the local structure;

[0024] Figure 6 Schematic diagram of the connection of the pulley, belt, cloth winding roller and one-way drive assembly in the present invention;

[0025] Figure 7 For the present invention Figure 6 A magnified schematic diagram of part B in the middle;

[0026] Figure 8 This is a schematic diagram of the connection between the pulley, transmission outer ring, transmission inner ring, wedge and other components in the present invention;

[0027] Figure 9 It is a connection diagram of the stabilizing component in the present invention;

[0028] Figure 10 Schematic diagram of the connection between the U-shaped frame and the locking studs in the present invention.

[0029] In the figure: 1-support plate, 2-column, 3-extension frame, 4-positioning stud, 5-canvas, 6-belt, 7-translation frame, 8-motor, 9-cloth roller, 10-L-shaped frame, 11-steering sleeve, 12-guide wheel, 13-positioning plug, 14-rack I, 15-guide column, 16-sliding frame, 17-spring ring, 18-switching column I, 19-switching column II, 20-extension rack, 21-travel gear, 22-lifting frame, 23-touch wheel, 24-return frame, 25-cloth roller, 26-adjusting stud, 27-fixing plate, 28-vertical spring, 29-vertical guide rod, 3 0-back plate, 31-sleeve plate, 32-parallelogram block, 33-marking pen, 34-thrust spring, 35-double wedge surface insert, 36-connecting column, 37-V groove, 38-traction spring, 39-pulley, 40-transmission outer ring, 41-transmission inner ring, 42-guide plate, 43-guide roller, 44-friction pressure block, 45-rotating shaft, 46-connecting frame, 47-wedge groove, 48-wedge block, 49-radial spring, 50-rack II, 51-center gear, 52-limiting strip plate, 53-U-shaped frame, 54-locking stud, 55-extension block, 56-connecting spring, 57-slide rod. DETAILED DESCRIPTION

[0030] The technical solution of the present invention is further described in detail below in conjunction with specific embodiments:

[0031] First embodiment: Please refer to the attached Figure 1 -Attached Figure 10A terrain flatness measuring device for land planning space includes a support plate 1, a vertically arranged column 2 is fixed on the support plate 1, a steering sleeve 11 is rotatably sleeved on the column 2, an extension frame 3 is fixed on the steering sleeve 11, a positioning stud 4 that abuts against the column 2 is threadedly installed on the steering sleeve 11, a translation frame 7 is slidably installed on the extension frame 3, a guide plate 42 is connected to the translation frame 7 through a switching component, a fixed plate 27 is fixed on the guide plate 42, an elastic guide component is installed on the fixed plate 27, a touch wheel 23 is rotatably installed at the bottom of the elastic guide component, a cloth winding roller 9, a cloth placing roller 25 and a guide roller 43 are rotatably installed on the extension frame 3, the cloth winding roller 9, the cloth placing roller 25 and the guide roller 4 3 is wound with a canvas 5, and a marking pen 33 for marking on the canvas 5 is installed on the elastic guide assembly. A rotating shaft 45 is coaxially fixed on the cloth winding roller 9 and the cloth placing roller 25, and a pulley 39 is rotatably sleeved on the rotating shaft 45. A belt 6 is connected between the two pulleys 39 for transmission, and the belt 6 is fixedly connected to the translation frame 7. A one-way drive assembly is installed on the pulley 39, and the one-way drive assembly is used to drive the rotating shaft 45 to rotate in one direction. An L-shaped frame 10 is fixed at the end of the extension frame 3, and a stabilizing assembly is installed on the L-shaped frame 10, wherein a motor 8 is fixed on the translation frame 7, and a traveling gear 21 is coaxially fixed to the output shaft of the motor 8, and an extension rack 20 meshing with the traveling gear 21 is fixed on the extension frame 3.

[0032] When the equipment is used to measure the flatness of the terrain of the national land space, the motor 8 drives the traveling gear 21 to move, and the traveling gear 21 engages with the extension rack 20 for transmission, so that the translation frame 7 can move linearly relative to the extension frame 3. The contact wheel 23 is kept in contact with the ground, so that the contact wheel 23 moves linearly synchronously with the translation frame 7. The elastic guide assembly realizes the synchronous movement of the contact wheel 23 and the marking pen 33, so that the marking pen 33 moves linearly and marks on the canvas 5 at the same time, thereby realizing the characterization and measurement of the ground flatness adjustment.

[0033] Specifically, the elastic guide assembly includes a lifting frame 22 that is slidably sleeved on the guide plate 42, a contact wheel 23 is rotatably installed at the bottom of the lifting frame 22, a vertical guide rod 29 is fixed between the lifting frame 22 and the fixed plate 27, a return frame 24 is slidably sleeved on the fixed plate 27, a vertical spring 28 is fixed between the return frame 24 and the lifting frame 22, and an adjustment stud 26 that is rotatably installed on the return frame 24 and abuts against the fixed plate 27.

[0034] The tactile wheel 23 rises and falls with the ground during movement, and the tactile wheel 23 drives the lifting frame 22 to move vertically, realizing the elastic deformation of the vertical spring 28, and realizing the lifting frame 22 driving the marking pen 33 to move, realizing the synchronous movement of the marking pen 33 and the tactile wheel 23, and the vertical movement of the return frame 24 is driven by screwing the adjustment stud 26, so that the distance between the return frame 24 and the lifting frame 22 in the initial state can be adjusted, ensuring that the vertical spring 28 has a suitable initial compression amount, ensuring that it has a suitable rebound force when the tactile wheel 23 pushes against the ground during movement, and improving the stability of marking by the marking pen 33.

[0035] The switching assembly of this device includes a connecting post 36 that is slidably connected to the translation frame 7 and fixed to the guide plate 42. A traction spring 38 is fixed between the connecting post 36 and the translation frame 7. A sleeve plate 31 is fixed to the side wall of the translation frame 7. A double-wedge-surfaced insert 35 is slidably mounted within the sleeve plate 31. A push spring 34 is fixed between the double-wedge-surfaced insert 35 and the sleeve plate 31. The side wall of the connecting post 36 is provided with two linearly distributed V-grooves 37, and the double-wedge-surfaced insert 35 plugs into and fits into the V-grooves 37. The switching assembly also includes a parallelogram block 32 fixed to the top of the guide plate 42. Switching posts I18 and II19 are fixed at each end of the extension frame 3, respectively. Switching posts I18 and II19 correspond horizontally to the parallelogram block 32.

[0036] When the translation frame 7 moves to the inclined surface of the parallelogram block 32 and abuts against the switching column I18, the parallelogram block 32 drives the guide plate 42 to move away from the translation frame 7, so that the V-groove 37 on the connecting column 36 close to the translation frame 7 is plugged and adapted with the double wedge-surface plug block 35, thereby realizing a temporary locking effect on the movement and switching of the guide plate 42. At this time, the marking pen 33 is separated from the canvas 5, and the traveling gear 21 is driven to rotate in the opposite direction by the adjusting motor 8, so that the translation frame 7 is reset, and the other inclined surface of the parallelogram block 32 abuts against the switching column II19, realizing the reset of the connecting column 36, and the marking pen 33 contacts the canvas 5 again, and the extension frame 3 is driven to rotate through the steering sleeve 11 to realize the adjustment of the direction of the extension frame 3, so as to facilitate the flatness measurement of terrain in different directions.

[0037] In addition, the unidirectional drive assembly of the present device includes a connecting frame 46 fixed to the bottom of the pulley 39. A transmission outer ring 40 is fixed to the bottom of the connecting frame 46. A transmission inner ring 41 is concentrically arranged inside the transmission outer ring 40 and fixedly sleeved on the rotating shaft 45. A wedge 48 is slidably mounted on the side wall of the transmission inner ring 41. A radial spring 49 is fixed between the wedge 48 and the transmission inner ring 41. The inner wall of the transmission outer ring 40 is provided with a plurality of circumferentially evenly distributed wedge grooves 47, and the wedge 48 is snap-fitted into the wedge grooves 47. The unidirectional drive assembly also includes an extension block 55 fixed to the extension frame 3. A slide bar 57 is slidably mounted on the extension block 55. A friction pressure block 44 is fixed to the slide bar 57 and is in frictional contact with the rotating shaft 45. A connecting spring 56 is fixed between the friction pressure block 44 and the extension block 55.

[0038] Based on the above arrangement, when the marking pen 33 moves toward the side of the switching column I18, the marking pen 33 performs dynamic marking on the canvas 5, and the belt 6 moves with the translation frame 7 and drives the pulley 39 to rotate counterclockwise, and the pulley 39 drives the transmission outer ring 40 to rotate counterclockwise through the connecting frame 46. Under the friction effect of the friction pressure block 44 on the rotating shaft 45, the rotating shaft 45 does not rotate, and the transmission outer ring 40 rotates counterclockwise relative to the transmission inner ring 41, while the transmission inner ring 41 does not rotate, that is, the cloth roller 9 does not rotate, that is, the canvas 5 keeps its position still, ensuring the stability of the marking pen 33 on the canvas 5. When the marking pen 33 moves toward When the steering sleeve 11 moves to one side, the belt 6 moves toward the steering sleeve 11 along with the translation frame 7. At this time, the pulley 39 rotates clockwise. Under the clamping action of the wedge block 48, the transmission outer ring 40 drives the transmission inner ring 41 to rotate. At this time, the rotating shaft 45 drives the cloth winding roller 9 to rotate clockwise and winds the canvas 5. In the process of the marking pen 33 moving toward the steering sleeve 11, the marked part of the canvas 5 can be automatically wound, and the unmarked part of the canvas 5 is automatically spread out, which is convenient for the marking pen 33 to mark on the canvas 5 during the next flatness measurement operation, thereby greatly improving the efficiency of the flatness measurement operation.

[0039] Second embodiment: Please refer to the attached Figure 1 -Attached Figure 10 On the basis of the first embodiment, in addition, the stabilizing component of the present device includes a limiting strip 52 fixed on the L-shaped frame 10, a rack 114 is slidably sleeved on the limiting strip 52, a positioning plug 13 is fixed to the bottom of the rack 114, a U-shaped frame 53 is fixed on the L-shaped frame 10, and a locking stud 54 is threadedly connected to the U-shaped frame 53 and abuts against the rack 114.

[0040] The stabilizing assembly also includes a center gear 51 rotatably mounted on the L-shaped frame 10, the center gear 51 meshes with the rack I14, a vertically arranged rack II50 is meshed and connected to the center gear 51, a sliding frame 16 is fixed on the rack II50, a guide column 15 is vertically slidably mounted on the sliding frame 16, a guide wheel 12 is mounted at the bottom of the guide column 15, and a spring coil 17 is fixed between the guide wheel 12 and the sliding frame 16.

[0041] Through the above arrangement, by pulling down rack I14, the positioning plug 13 can be driven vertically downward and inserted into the soil, thereby stabilizing the extension frame 3 and effectively improving the stability of the terrain flatness measurement process. When the rack I14 is moved upward, the rack I14 drives the positioning plug 13 upward. At this time, the central gear 51 rotates and drives the rack II50 downward. At this time, the rack II50 drives the sliding frame 16 downward. The guide wheel 12 can move vertically downward and contact the ground. By tightening the locking stud 54 and tightening it against the rack I14, the position of the sliding frame 16 is limited. In this state, when the extension frame 3 is rotated to adjust its direction, the guide wheel 12 plays a guiding and supporting role, facilitating the flexible adjustment of the extension frame 3 and facilitating the flatness measurement of terrain in different directions.

[0042] In addition, a vertically arranged backboard 30 is fixed on the translation frame 7. The backboard 30 and the marking pen 33 are arranged opposite to each other, and the canvas 5 is located between the backboard 30 and the marking pen 33. The backboard 30 can support the canvas 5, so that when the marking pen 33 is marking, the canvas 5 is stably supported, ensuring the clarity of the marking of the marking pen 33 on the canvas 5, and effectively improving the measurement effect of the terrain flatness.

[0043] In summary, the present invention provides a linear movement of the translation frame 7 relative to the extension frame 3, so that the touch wheel 23 can move up and down as the terrain changes under the action of the elastic guide component, and the provided marking pen 33 can make marks on the canvas 5 to achieve the measurement of the terrain flatness in a certain direction, and the steering sleeve 11 drives the extension frame 3 to rotate to achieve the switching adjustment of the moving direction of the touch wheel 23, which greatly facilitates the comprehensive multi-directional terrain flatness measurement and processing of the measurement area, and effectively improves the measurement efficiency of the terrain flatness. The switching component provided in the present invention can switch the position of the marking pen 33, so that after the marking pen 33 moves from one end of the extension frame 3 to the other end and completes marking on the canvas 5, the marking pen 33 can move away from the canvas 5 when sliding in the opposite direction and resetting, thereby realizing the one-way marking of the marking pen 33 on the canvas 5. At the same time, during the resetting process of the marking pen 33, the belt 6 is driven to move by the translation frame 7. Under the action of the one-way driving component, the cloth winding roller 9 automatically winds the canvas 5, so that the unmarked canvas 5 is automatically spread on the extension frame 3, which greatly facilitates the marking of the marking pen 33 on the canvas 5 when measuring the flatness in the next direction, and the efficiency of terrain flatness measurement is significantly improved.

Claims

1. A terrain flatness measuring device for land planning space, comprising a support plate (1), a vertically arranged column (2) fixed on the support plate (1), a steering sleeve (11) rotatably sleeved on the column (2), an extension frame (3) fixed on the steering sleeve (11), and a positioning stud (4) abutting against the column (2) threadedly mounted on the steering sleeve (11), characterized in that: The extension frame (3) is slidably mounted with a translation frame (7), the translation frame (7) is connected to a guide plate (42) via a switching assembly, a fixed plate (27) is fixed to the guide plate (42), an elastic guide assembly is mounted on the fixed plate (27), a touch wheel (23) is rotatably mounted on the bottom of the elastic guide assembly, a cloth winding roller (9), a cloth placing roller (25) and a guide roller (43) are rotatably mounted on the extension frame (3), and the cloth winding roller (9), the cloth placing roller (25) and the guide roller (43) are wound with A canvas (5), a marking pen (33) for marking on the canvas (5) is installed on the elastic guide assembly, a rotating shaft (45) is coaxially fixed on the cloth winding roller (9) and the cloth placing roller (25), a pulley (39) is rotatably sleeved on the rotating shaft (45), a belt (6) is connected between the two pulleys (39), the belt (6) is fixedly connected to the translation frame (7), and a one-way drive assembly is installed on the pulley (39), and the one-way drive assembly is used to drive the rotating shaft (45) to rotate in one direction The end of the extension frame (3) is fixed with an L-shaped frame (10), and a stabilizing component is installed on the L-shaped frame (10). The switching component includes a connecting column (36) slidably connected to the translation frame (7), the connecting column (36) is fixed on the guide plate (42), and a traction spring (38) is fixed between the connecting column (36) and the translation frame (7). A sleeve plate (31) is fixed to the side wall of the translation frame (7), and a double wedge surface plug (35) is slidably installed in the sleeve plate (31). The double wedge surface plug (35) and the sleeve plate ( A push spring (34) is fixed between the connecting column (31), two linearly distributed V-grooves (37) are provided on the side wall of the connecting column (36), and a double wedge surface plug-in block (35) is plugged and adapted to the V-grooves (37). The switching assembly also includes a parallelogram block (32) fixed on the top of the guide plate (42), and a switching column I (18) and a switching column II (19) are fixed at both ends of the extension frame (3), respectively, and the switching column I (18) and the switching column II (19) correspond horizontally to the parallelogram block (32).

2. The terrain flatness measuring device for land planning space according to claim 1 is characterized in that: A motor (8) is fixed on the translation frame (7), a travel gear (21) is coaxially fixed to the output shaft of the motor (8), and an extension rack (20) meshing with the travel gear (21) is fixed on the extension frame (3).

3. The terrain flatness measuring device for land planning space according to claim 1, characterized in that: The elastic guide assembly includes a lifting frame (22) slidably sleeved on the guide plate (42), the contact wheel (23) is rotatably mounted on the bottom of the lifting frame (22), a vertical guide rod (29) is fixed between the lifting frame (22) and the fixed plate (27), a return frame (24) is slidably sleeved on the fixed plate (27), a vertical spring (28) is fixed between the return frame (24) and the lifting frame (22), and an adjusting stud (26) is rotatably mounted on the return frame (24) and abuts against the fixed plate (27).

4. The terrain flatness measuring device for land planning space according to claim 1, characterized in that: The one-way drive assembly includes a connecting frame (46) fixed to the bottom of the pulley (39), a transmission outer ring (40) is fixed to the bottom of the connecting frame (46), a transmission inner ring (41) fixedly sleeved on the rotating shaft (45) is concentrically arranged inside the transmission outer ring (40), a wedge block (48) is slidably mounted on the side wall of the transmission inner ring (41), a radial spring (49) is fixed between the wedge block (48) and the transmission inner ring (41), and the inner wall of the transmission outer ring (40) is provided with a plurality of wedge grooves (47) uniformly distributed in an annular direction, and the wedge block (48) is snap-fitted with the wedge groove (47).

5. The terrain flatness measuring device for land planning space according to claim 4 is characterized in that: The one-way drive assembly further comprises an extension block (55) fixed on the extension frame (3), a slide bar (57) being slidably mounted on the extension block (55), a friction pressure block (44) being fixed on the slide bar (57) and being in frictional contact with the rotating shaft (45), and a connecting spring (56) being fixed between the friction pressure block (44) and the extension block (55).

6. The terrain flatness measuring device for land planning space according to claim 1, characterized in that: The stabilizing assembly comprises a limiting strip (52) fixed on the L-shaped frame (10), a rack I (14) being slidably sleeved on the limiting strip (52), a positioning plug (13) being fixed at the bottom of the rack I (14), a U-shaped frame (53) being fixed on the L-shaped frame (10), and a locking stud (54) being threadedly connected to the U-shaped frame (53) and abutting against the rack I (14).

7. The terrain flatness measuring device for land planning space according to claim 6, characterized in that: The stabilizing assembly further comprises a central gear (51) rotatably mounted on the L-shaped frame (10), the central gear (51) being meshed with a rack I (14), a rack II (50) being vertically arranged being meshed and connected to the central gear (51), a sliding frame (16) being fixed on the rack II (50), a guide column (15) being vertically slidably mounted on the sliding frame (16), a guide wheel (12) being mounted at the bottom of the guide column (15), and a spring ring (17) being fixed between the guide wheel (12) and the sliding frame (16).

8. A terrain flatness measuring device for land planning space according to any one of claims 1 to 7, characterized in that: A vertically arranged backboard (30) is fixed on the translation frame (7), the backboard (30) and the marking pen (33) are arranged opposite to each other, and the canvas (5) is located between the backboard (30) and the marking pen (33).

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