A high-precision land surveying instrument that is easy to adjust

Abstract

The present invention relates to the technical field of land surveying instruments, and proposes a high-precision land surveying instrument that is easy to adjust, including a propulsion frame, the lower part of which is rotatably connected to a distance measuring wheel, a width-changing mechanism is arranged inside the distance measuring wheel, the width-changing mechanism is connected to a control mechanism arranged on the propulsion frame, a control display is arranged on the upper part of the propulsion frame, and a counter for measuring the number of rotations of the distance measuring wheel is arranged on the lower part of the propulsion frame, and the counter is electrically connected to the control display. The beneficial effects of the present invention are as follows: the distance measuring wheel can rotate on the ground, and the measured length can be calculated by measuring the number of rotations of the distance measuring wheel through the counter, and the length information can be displayed in real time through the control display, and by arranging a width-changing mechanism on the distance measuring wheel, the outer width of the distance measuring wheel can be widened under the control of the control mechanism, so that the distance measuring wheel can be prevented from sinking into a pothole when encountering a pothole, and the distance measuring wheel can rotate smoothly and close to the ground, and the number of rotations is more accurate, thereby improving the measurement accuracy.

Description

Technical Field

[0001] The invention relates to the technical field of land length and area measuring instruments, and in particular to a high-precision land measuring instrument that is easy to adjust. Background Art

[0002] In land measurement, it is necessary to measure the length of the land, and multiple length results can be used to calculate the area of ​​the land. Existing instruments for measuring the length or side length of land generally use manual inference wheel carts. However, when measuring the length, since the land surface is not very flat, there will be potholes. If the measuring wheel passes over the potholes, the number of rotations will increase, which will cause the measured length to be greater than the actual length, thereby affecting the measurement accuracy. Therefore, it is necessary to provide a new technical solution to improve the measurement accuracy of the land length. Summary of the invention

[0003] The invention provides a high-precision land surveying instrument which is easy to adjust. When measuring, the width of the distance measuring wheel can be changed to cover the potholes and make the distance measuring wheel rotate smoothly, thereby improving the measurement accuracy.

[0004] To this end, the present invention provides a high-precision land surveying instrument that is easy to adjust, including a propulsion frame, the lower part of which is rotatably connected to a measuring wheel, a width-changing mechanism is provided inside the measuring wheel, the width-changing mechanism is connected to a control mechanism arranged on the propulsion frame, a control display is provided on the upper part of the propulsion frame, and a counter for measuring the number of rotations of the measuring wheel is provided on the lower part of the propulsion frame, and the counter is electrically connected to the control display.

[0005] By adopting the above technical solution: the frame is pushed by hand, the distance measuring wheel can be rotated on the ground, the measured length can be calculated by counting the number of rotations of the distance measuring wheel through a counter, and the length information can be displayed in real time by controlling the display. By arranging a width-changing mechanism on the distance measuring wheel, the outer width of the distance measuring wheel can be widened under the control of the control mechanism, so that the distance measuring wheel can be prevented from sinking into potholes, and can be rotated smoothly and closely to the ground, with a more accurate number of rotations. The length of the land measurement can be calculated by obtaining the accurate number of rotations through the counter, thereby improving the accuracy of the land measurement.

[0006] Optionally, the distance measuring wheel is rotatably connected to the lower part of the pushing frame through a fixed half-shaft, the fixed half-shaft is hollow inside, and a push handle is provided on the upper part of the pushing frame. The control mechanism includes a handle rotatably connected to the push handle through a torsion shaft, a pull wire is connected to the end of the handle, and the pull wire is connected to the widening mechanism.

[0007] By adopting the above technical solution: two fixed half-axles are fixed at the lower part of the pushing frame, and the measuring wheel is rotatably connected to the two fixed half-axles. Firstly, it is convenient to rotate the measuring wheel, and secondly, it is convenient to install the width-changing mechanism. When the handle is turned, the pull wire can pull the width-changing mechanism to operate, thereby realizing the width widening of the outer side of the measuring wheel, which is convenient for passing through potholes.

[0008] Optionally, a limiting tube is provided on the pushing frame, and the pull wire is inside the limiting tube.

[0009] By adopting the above technical solution: by setting a limiting tube, the pull wire is set inside the limiting tube, the pull wire can be limited, so that the force is accurately transmitted to the width changing mechanism through the pull wire.

[0010] Optionally, the width-changing mechanism includes a driving shaft rotatably connected to a fixed half-shaft, a side of the driving shaft is connected to a pull wire, the driving shaft is connected to a transmission assembly, and the transmission assembly is transmission-connected to a width-changing assembly slidably arranged on a side of the measuring wheel.

[0011] By adopting the above technical solution: when the pull wire is pulled, the driving shaft is driven to rotate, and the rotation of the driving shaft can drive the transmission component to move, and the transmission component drives the width-changing component to move through the transmission.

[0012] Optionally, the transmission assembly includes a transmission plate connected to the driving shaft and a fixed plate fixedly connected to the fixed half-shaft, the transmission plate is provided with a plurality of arc grooves in the same direction, the fixed plate is provided with a sliding groove, a trigger rod is slidably connected in the sliding groove, one end of the trigger rod is connected to a sliding rod, the sliding rod is slidably connected inside the sliding groove, and the other end of the trigger rod is provided with a trigger block for driving the widening assembly.

[0013] By adopting the above technical solution: when the driving shaft rotates, the transmission disk is driven to rotate. Since the transmission disk is provided with an arc groove and a rod is provided in the arc groove, when the transmission plate rotates, for example, in this solution, when the pull wire drives the transmission disk to rotate clockwise through the driving shaft, the sliding rod pushes the trigger rod to spread to the outer peripheral side of the transmission disk, thereby pushing the trigger block to move outward.

[0014] Optionally, the width-changing assembly includes a plurality of groups of arc-shaped extension pieces slidably arranged on the side of the distance measuring wheel, each group of the arc-shaped extension pieces includes two, and the ends of the two arc-shaped extension pieces inside the distance measuring wheel are provided with a passive block cooperating with the trigger block.

[0015] By adopting the above technical solution, when the trigger block moves outward, the two driven blocks are pushed to move to the two sides of the distance measuring wheel, thereby driving the arc extension piece to extend out of the distance measuring wheel, indirectly changing the width of the distance measuring wheel, so as to facilitate it to pass through potholes.

[0016] Optionally, first inclined portions are provided on both sides of the actuating block, and second inclined portions cooperating with the first inclined portions are provided on both of the two actuated blocks.

[0017] By adopting the above technical solution, when the trigger block spreads outward, the first inclined surface thereof partially contacts the second inclined surface of the passive block, thereby squeezing the two passive blocks to move away from each other, thereby realizing the extension of the arc-shaped extension piece.

[0018] Optionally, a return spring is provided between the two driven blocks and the inner wall of the distance measuring wheel.

[0019] By adopting the above technical solution: when passing through a pothole, the two driven blocks can be returned to their original positions by the return spring, and the actuating block can be pushed back with assistance at the same time.

[0020] Optionally, the pushing frame includes a connecting rod, the upper end of the connecting rod is provided with a push handle and a control display, the lower end of the connecting rod is connected to a U-shaped fork frame, the two fixed half-axes are fixed on the U-shaped fork frame, and the measuring wheel is rotatably connected to the two fixed half-axes.

[0021] Optionally, a counting hole is provided on the distance measuring wheel.

[0022] By adopting the above technical solution: the counter can adopt a laser sensor, and when the laser sensor penetrates the counting hole, it is determined that the distance measuring wheel rotates one circle.

[0023] The working principle and beneficial effects of the present invention are:

[0024] 1. By pushing the frame by hand, the distance measuring wheel can rotate on the ground. The measured length can be calculated by counting the number of rotations of the distance measuring wheel through the counter, and the length information can be displayed in real time by controlling the display. By arranging a width-changing mechanism on the distance measuring wheel, the outer width of the distance measuring wheel can be widened under the control of the control mechanism, so that the distance measuring wheel can be prevented from sinking into potholes, and can rotate smoothly and close to the ground, and the number of rotations is more accurate, thereby improving the measurement accuracy.

[0025] 2. Two fixed half-axles are fixed to the lower part of the pushing frame, and the distance measuring wheel is rotatably connected to the two fixed half-axles. First, it is convenient for the distance measuring wheel to rotate, and second, it is convenient to install the width-changing mechanism. When the handle is turned, the pull wire can pull the width-changing mechanism to move, thereby realizing the width widening of the outer side of the distance measuring wheel, which is convenient for passing through potholes, making the number of rotations of the distance measuring wheel more realistic, thereby improving the measurement accuracy.

[0026] 3. When the driving shaft rotates, the transmission plate is driven to rotate. Since the transmission plate is provided with an arc groove and a rod is provided in the arc groove, when the transmission plate rotates, for example, in this scheme, when the pull wire drives the transmission plate to rotate clockwise through the driving shaft, the sliding rod pushes the trigger rod to spread to the outer peripheral side of the transmission plate, thereby pushing the trigger block to move outward.

[0027] 4. When the actuating block spreads outward, the first inclined surface on it contacts the second inclined surface of the actuating block, thereby squeezing the two actuating blocks to move away from each other, thereby realizing the extension of the arc-shaped extension piece, thereby facilitating the passage of the distance measuring wheel and improving the measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0029] Figure 1 It is a schematic diagram of the overall side structure of an embodiment of the present invention;

[0030] Figure 2 It is a front structural schematic diagram of the initial state of the distance measuring wheel of an embodiment of the present invention;

[0031] Figure 3 It is a front structural schematic diagram of the distance measuring wheel after being widened according to an embodiment of the present invention;

[0032] Figure 4 This is a schematic diagram of the internal structure of a distance measuring wheel according to an embodiment of the present invention;

[0033] Figure 5 It is a partial structural schematic diagram of the cooperation between the width-changing component and the transmission component in an embodiment of the present invention.

[0034] In the figure: 100, pushing frame; 110, pushing handle; 120, connecting rod; 130, U-shaped fork frame; 200, measuring wheel; 210, counting hole; 300, widening mechanism; 310, driving shaft; 320, transmission plate; 330, fixed plate; 340, arc groove; 350, sliding groove; 360, trigger rod; 370, sliding rod; 380, trigger block; 381, first inclined portion; 390, arc extension piece; 391, driven block; 392, second inclined portion; 393, reset spring; 400, control mechanism; 410, torque shaft; 420, handle; 430, pull wire; 440, limit tube; 500, control display; 600, counter; 700, fixed semi-axis. DETAILED DESCRIPTION

[0035] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] like Figure 1-Figure 5 As shown, the present embodiment provides a high-precision land surveying instrument that is easy to adjust, including a propulsion frame 100, the lower part of which is rotatably connected to a distance measuring wheel 200, a width changing mechanism 300 is arranged inside the distance measuring wheel 200, the width changing mechanism 300 is connected to a control mechanism 400 arranged on the propulsion frame 100, a control display 500 is arranged on the upper part of the propulsion frame 100, and a counter 600 for measuring the number of rotations of the distance measuring wheel 200 is arranged on the lower part of the propulsion frame 100, the counter 600 is electrically connected to the control display 500, the number of rotations of the distance measuring wheel 200 is measured by the counter 600, and then the number of rotations signal is transmitted to the control display 500, and then the measured length of the land is calculated and displayed by the control display 500.

[0037] The basic principle of this embodiment is as follows: by pushing the frame 100 by hand, the distance measuring wheel 200 can rotate on the ground, and the measured length can be calculated by measuring the number of rotations of the distance measuring wheel 200 through the counter 600, and the length information can be displayed in real time by controlling the display 500. By arranging a width-changing mechanism 300 on the distance measuring wheel 200, the outer width of the distance measuring wheel 200 can be widened under the control of the control mechanism 400, so that the distance measuring wheel 200 can be prevented from sinking into potholes and can rotate smoothly and close to the ground, so that the number of rotations of the distance measuring wheel 200 is more accurate and more consistent with the actual length of the land, thereby improving the measurement accuracy.

[0038] In order to facilitate the installation of the distance measuring wheel 200 and the width changing mechanism 300, the distance measuring wheel 200 in this embodiment is rotatably connected to the lower part of the pushing frame 100 through a fixed half-shaft 700, the interior of the fixed half-shaft 700 is hollow, and a push handle 110 is provided on the upper part of the pushing frame 100. The control mechanism 400 includes a handle 420 rotatably connected to the push handle 110 through a torsion shaft 410, and a pull wire 430 is connected to the end of the handle 420, and the pull wire 430 is connected to the width changing mechanism 300.

[0039] Two fixed half shafts 700 are fixed to the lower part of the pushing frame 100, and the distance measuring wheel 200 is rotatably connected to the two fixed half shafts 700. First, it is convenient for the distance measuring wheel 200 to rotate, and second, it is convenient to install the width changing mechanism 300. When the handle 420 is rotated, the pull wire 430 can pull the width changing mechanism 300 to operate, thereby realizing the width widening of the outer side of the distance measuring wheel 200, which is convenient for passing through potholes, making the number of rotations of the distance measuring wheel 200 more accurate, thereby improving the measurement accuracy.

[0040] In order to facilitate the limiting of the pull wire 430, the present embodiment is provided with a limiting tube 440 on the pushing frame 100, and the pull wire 430 is inside the limiting tube 440, one end of the limiting tube 440 is arranged at the handle 420, and the other end is arranged at the fixed half shaft 700. By setting the limiting tube 440 and the pull wire 430 being arranged inside the limiting tube 440, the pull wire 430 can be limited, so that the force can be accurately transmitted to the width changing mechanism 300 through the pull wire 430.

[0041] The width changing mechanism 300 in this embodiment includes a driving shaft 310 rotatably connected to the fixed half shaft 700, the side of the driving shaft 310 is connected to the pull wire 430, and the driving shaft 310 is connected to a transmission component, which is transmission-connected to a width changing component slidably arranged on the side of the distance measuring wheel 200.

[0042] When the pull wire 430 is pulled, the driving shaft 310 is driven to rotate, and the rotation of the driving shaft 310 can drive the transmission component to move, and the transmission component drives the width-changing component to move through the transmission.

[0043] The transmission assembly includes a transmission plate 320 connected to the driving shaft 310, and a fixed plate 330 fixedly connected to the fixed half shaft 700. The transmission plate 320 is provided with a plurality of arc grooves 340 in the same direction. The fixed plate 330 is provided with a slide groove 350. A trigger rod 360 is slidably connected in the slide groove 350. One end of the trigger rod 360 is connected to a slide rod 370. The slide rod 370 is slidably connected inside the slide groove 350. The other end of the trigger rod 360 is provided with a trigger block 380 for driving the width-changing assembly.

[0044] When the drive shaft 310 rotates, the transmission disk 320 is driven to rotate. Since the transmission disk 320 is provided with an arc groove 340, and a rod is provided in the arc groove 340, when the transmission plate rotates, for example, in this solution, when the pull wire 430 drives the transmission disk 320 to rotate clockwise through the drive shaft 310, the sliding rod 370 pushes the trigger rod 360 to spread toward the outer peripheral side of the transmission disk 320, thereby pushing the trigger block 380 to move outward.

[0045] The width-changing assembly includes a plurality of groups of arc-shaped extension pieces 390 slidably arranged on the side of the distance measuring wheel 200 , each group of the arc-shaped extension pieces 390 includes two, and the ends of the two arc-shaped extension pieces 390 inside the distance measuring wheel 200 are provided with a passive block 391 cooperating with the trigger block 380 .

[0046] When the actuating block 380 moves outward, the two actuated blocks 391 are pushed to move toward the two sides of the distance measuring wheel 200 , thereby driving the arc-shaped extension piece 390 to extend out of the distance measuring wheel 200 , indirectly changing the width of the distance measuring wheel 200 , making it easier for the distance measuring wheel 200 to pass through potholes.

[0047] Furthermore, first inclined surface portions 381 are provided on both sides of the actuating block 380 in this embodiment, and second inclined surface portions 392 cooperating with the first inclined surface portions 381 are provided on the two actuating blocks 391 .

[0048] When the trigger block 380 spreads outward, the first inclined surface 381 thereof contacts the second inclined surface of the actuated block 391 , thereby squeezing the two actuated blocks 391 to move away from each other, thereby achieving the extension of the arc-shaped extension piece 390 .

[0049] In order to facilitate the return, a return spring 393 is provided between the two actuated blocks 391 and the inner wall of the distance measuring wheel 200 in this embodiment. When passing through a pothole, the return spring 393 can return the two actuated blocks 391 and assist in pushing back the trigger block 380.

[0050] Finally, the pushing frame 100 of this embodiment includes a connecting rod 120, the upper end of which is provided with a push handle 110 and a control display 500, the lower end of the connecting rod 120 is connected to a U-shaped fork frame 130, the two fixed half shafts 700 are fixed on the U-shaped fork frame 130, the distance measuring wheel 200 is rotatably connected to the two fixed half shafts 700, and the distance measuring wheel 200 is provided with a counting hole 210.

[0051] The counter 600 may use a laser sensor. When the laser sensor penetrates the counting hole, it is determined that the distance measuring wheel 200 has rotated one circle.

[0052] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-precision land surveying instrument that is easy to adjust, characterized in that: The invention comprises a propulsion frame (100), the lower part of which is rotatably connected to a distance measuring wheel (200), a width changing mechanism (300) being arranged inside the distance measuring wheel (200), the width changing mechanism (300) being connected to a control mechanism (400) arranged on the propulsion frame (100), a control display (500) being arranged on the upper part of the propulsion frame (100), a counter (600) for measuring the number of rotations of the distance measuring wheel (200) being arranged on the lower part of the propulsion frame (100), and the counter (600) being electrically connected to the control display (500); The distance measuring wheel (200) is rotatably connected to the lower part of the pushing frame (100) via a fixed half-shaft (700); the fixed half-shaft (700) is hollow inside; a push handle (110) is provided at the upper part of the pushing frame (100); the control mechanism (400) comprises a handle (420) rotatably connected to the push handle (110) via a torque shaft (410); a pull wire (430) is connected to the end of the handle (420); and the pull wire (430) is connected to the width changing mechanism (300); The pushing frame (100) is provided with a limiting tube (440), and the pull wire (430) is located inside the limiting tube (440); The width-changing mechanism (300) comprises a driving shaft (310) rotatably connected to a fixed half shaft (700), the side of the driving shaft (310) being connected to a pull wire (430), the driving shaft (310) being connected to a transmission assembly, the transmission assembly being transmission-connected to a width-changing assembly slidably disposed on the side of the distance measuring wheel (200); The transmission assembly comprises a transmission disc (320) connected to the driving shaft (310), and a fixed disc (330) fixedly connected to the fixed half shaft (700); the transmission disc (320) is provided with a plurality of arc grooves (340) in the same direction; the fixed disc (330) is provided with a slide groove (350); a trigger rod (360) is slidably connected in the slide groove (350); one end of the trigger rod (360) is connected to a slide rod (370); the slide rod (370) is slidably connected in the slide groove (350); and the other end of the trigger rod (360) is provided with a trigger block (380) for driving the width-changing assembly; The width-changing assembly comprises a plurality of groups of arc-shaped extension pieces (390) slidably arranged on the side of the distance measuring wheel (200), each group of the arc-shaped extension pieces (390) comprising two, and the ends of the two arc-shaped extension pieces (390) inside the distance measuring wheel (200) are provided with an actuated block (391) cooperating with the actuating block (380); The two sides of the actuating block (380) are provided with first inclined portions (381), and the two passive blocks (391) are both provided with second inclined portions (392) that cooperate with the first inclined portions (381); A return spring (393) is provided between the two driven blocks (391) and the inner wall of the distance measuring wheel (200).

2. The easily adjustable high-precision land surveying instrument according to claim 1, characterized in that: The pushing frame (100) comprises a connecting rod (120), the upper end of the connecting rod (120) is provided with a push handle (110) and a control display (500), the lower end of the connecting rod (120) is connected to a U-shaped fork frame (130), the two fixed half shafts (700) are fixed on the U-shaped fork frame (130), and the distance measuring wheel (200) is rotatably connected to the two fixed half shafts (700).

3. The easily adjustable high-precision land surveying instrument according to claim 2, characterized in that: The distance measuring wheel (200) is provided with a counting hole (210).

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