Traffic road range finder

Abstract

The utility model provides a traffic road distance measuring instrument, which relates to the technical field of engineering surveying, and comprises a wheel carrier, a reading device and a measuring wheel, the lower end of the wheel carrier is rotatably connected with a distance measuring shaft, and the distance measuring shaft comprises a main shaft and a correction shaft assembly; the correction shaft assembly comprises a mounting rod, a fixed ratchet ring, a connecting bolt, a correction ratchet ring, a correction spring and a distance measuring sleeve, a spline groove is formed in the side, facing the fixed ratchet ring, of the mounting rod, the fixed ratchet ring is inserted into the spline groove, ratchets of the fixed ratchet ring and the correction ratchet ring are meshed with each other, the distance measuring sleeve is arranged on the outer wall of the mounting rod in a sleeving mode, and the distance measuring sleeve is connected with the connecting bolt. The correcting ratchet ring is connected into the distance measuring sleeve in a sliding mode, the correcting spring abuts against the position between the distance measuring sleeve and the correcting ratchet ring, and a synchronous belt is connected between the distance measuring sleeve and the reading device. According to the utility model, the ratchets of the fixed ratchet ring and the correction ratchet ring are mutually engaged to realize one-way synchronous locking, so that a worker is prevented from reversely counting due to misoperation, and the accuracy of distance measurement is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering measurement, in particular to a traffic road distance meter. Background Art

[0002] The roller distance meter is a measuring device. It consists of a handle, a distance measuring wheel and a reading device. A connecting rod is installed at the lower end of the handle, and a wheel frame is installed at the lower end of the connecting rod. The distance measuring wheel is installed in the wheel frame. The wheel distance meter is specially designed and manufactured for outdoor distance measurement. It is suitable for various ground conditions, including hillsides, grasslands, rugged construction sites, etc. The lightweight design makes it very convenient for field workers to carry and greatly reduces work fatigue.

[0003] However, during the measurement process, due to human operation, the measuring wheel may turn backward or the ranging wheel may be lifted up and rotate out of the planned range, which will cause distance measurement errors. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a traffic road distance meter, which solves the problems raised in the above background technology.

[0006] (II) Technical solution

[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A traffic road distance meter comprises a distance meter body, the distance meter body comprises a wheel frame, a reading device and a measuring wheel, the lower end of the wheel frame is rotatably connected with a distance measuring shaft, the measuring wheel is fixed on the distance measuring shaft, the distance measuring shaft comprises a main shaft and a correction shaft assembly, the wheel frame and the measuring wheel are connected to the main shaft, the correction shaft assembly comprises a mounting rod, a fixing ratchet ring, a connecting bolt, a correction ratchet ring, a correction spring and a distance measuring sleeve, the mounting rod is integrally formed at one end of the main shaft, a spline groove is provided on the side of the mounting rod facing the fixing ratchet ring, the fixing ratchet ring is inserted in the spline groove with a concave-convex fitting, the connecting bolt is connected between the fixing ratchet ring and the mounting rod, the ratchet teeth of the fixing ratchet ring and the correction ratchet ring are engaged with each other, the distance measuring sleeve is sleeved on the outer wall of the mounting rod, the correction ratchet ring is slidably connected inside the distance measuring sleeve, the correction spring abuts between the distance measuring sleeve and the correction ratchet ring, and a synchronous belt is connected between the distance measuring sleeve and the reading device.

[0009] Preferably, a connecting groove is provided at the bottom of the spline groove, a fixing ring is provided on the inner wall of the fixing ratchet ring, the connecting bolt passes through the fixing ring and is threadedly connected in the connecting groove, and the screw head of the connecting bolt abuts against the fixing ring.

[0010] Preferably, a spline groove is formed on the inner wall of the ranging sleeve, and the correction ratchet ring is slidably connected in the spline groove.

[0011] Preferably, the wheel frame includes an armrest and a telescopic rod, a telescopic slot is provided at the lower end of the armrest, the top of the telescopic rod is slidably inserted in the telescopic slot, a telescopic spring is connected between the telescopic slot and the telescopic rod, and the main shaft is connected to the lower end of the telescopic rod.

[0012] Preferably, a separation mechanism is connected between the armrest and the ranging sleeve, and the separation mechanism includes a separation frame, a support plate, a separation rod, a separation block and a separation spring. The separation frame is fixed on the armrest, and the support plate and the separation rod are fixed on the separation frame and extend downward, and the separation block is fixed on the outer wall of the ranging sleeve. The separation spring abuts between the support plate and the separation block, and an extrusion slope is provided on the side of the separation block facing away from the separation spring, and an extrusion block is provided on the lower end of the separation rod toward the side of the separation block, and the extrusion block slides and fits against the extrusion slope.

[0013] Preferably, a mounting frame is provided on the armrest, the reading device is fixed on the mounting frame, and the separation frame is fixed on the mounting frame.

[0014] (III) Beneficial effects

[0015] The utility model provides a traffic road distance meter, which has the following beneficial effects:

[0016] 1. In the utility model, the correction shaft assembly can make the distance measuring sleeve and the main shaft keep unidirectional synchronous rotation through the mutual engagement of the fixed ratchet ring and the correction ratchet ring. When the measuring wheel rolls forward, the distance measuring sleeve and the measuring wheel rotate synchronously, thereby driving the reading device to count. When the measuring wheel rolls reversely, the fixed ratchet ring and the correction ratchet ring rotate in the opposite direction. The correction spring can make the correction ratchet ring and the fixed ratchet ring slide backward and will not rotate synchronously with the main shaft. The reading device will not count, thereby avoiding reading errors caused by reversal.

[0017] 2. The separation mechanism provided in the utility model can make the measuring wheel fall down under the action of its own gravity when the rangefinder is lifted, and the rangefinder sleeve is pushed backward as a whole by the mutual squeezing of the squeezing block and the separation block, so that the ratchet ring and the correction ratchet ring are directly separated, and the forward and reverse reading devices will not count. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of a traffic road distance meter of the utility model;

[0019] Figure 2 It is a structural schematic diagram of the measuring wheel in the utility model;

[0020] Figure 3It is a cross-sectional structural schematic diagram of the distance measuring shaft in the utility model;

[0021] Figure 4 It is an exploded view of the distance measuring shaft in the utility model;

[0022] Figure 5 It is a structural schematic diagram of the separation mechanism in the utility model.

[0023] In the figure: 1, wheel frame; 101, handrail; 102, telescopic rod; 2, reading device; 3, measuring wheel; 4, main shaft; 5, mounting rod; 6, fixing ratchet ring; 7, connecting bolt; 8, correction ratchet ring; 9, correction spring; 10, distance measuring sleeve; 11, synchronous belt; 12, telescopic spring; 13, separation frame; 14, support plate; 15, separation rod; 16, separation block; 17, separation spring; 18, extrusion block. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0025] The utility model provides a traffic road distance meter.

[0026] like Figure 1-4 As shown, the rangefinder body includes a wheel frame 1, a reading device 2 and a measuring wheel 3. The lower end of the wheel frame 1 is rotatably connected to a measuring shaft, and the measuring wheel 3 is fixed on the measuring shaft. The measuring shaft includes a main shaft 4 and a correction shaft assembly. The wheel frame 1 and the measuring wheel 3 are connected to the main shaft 4. The correction shaft assembly includes a mounting rod 5, a fixed ratchet ring 6, a connecting bolt 7, a correction ratchet ring 8, a correction spring 9 and a measuring sleeve 10. The mounting rod 5 is integrally formed at one end of the main shaft 4. A spline groove is provided on the side of the mounting rod 5 facing the fixed ratchet ring 6. The fixed ratchet ring 6 is inserted into the spline groove in a concave-convex matching manner. A connecting groove is provided at the bottom of the spline groove. The inner wall of the fixed ratchet ring 6 is provided with a There is a fixing ring, the connecting bolt 7 passes through the fixing ring and is threadedly connected in the connecting groove, the screw head of the connecting bolt 7 abuts on the fixing ring, the front ends of the fixing ratchet ring 6 and the correction ratchet ring 8 are provided with symmetrically arranged ratchets, the front ends of the ratchets are provided with vertical bite surfaces and sliding surfaces connected end to end, the ratchets of the fixing ratchet ring 6 and the correction ratchet ring 8 bite each other, the ranging sleeve 10 is sleeved on the outer wall of the mounting rod 5, the inner wall of the ranging sleeve 10 is provided with a spline groove, the correction ratchet ring 8 is slidably connected in the spline groove of the ranging sleeve 10, the correction spring 9 abuts between the ranging sleeve 10 and the correction ratchet ring 8, and a synchronous belt 11 is connected between the ranging sleeve 10 and the reading device 2.

[0027] It is further configured that the wheel frame 1 includes an armrest 101 and a telescopic rod 102, a telescopic slot is provided at the lower end of the armrest 101, the top of the telescopic rod 102 is slidably inserted in the telescopic slot, a telescopic spring 12 is connected between the telescopic slot and the telescopic rod 102, the main shaft 4 is connected to the lower end of the telescopic rod 102, a separation mechanism is connected between the armrest 101 and the ranging sleeve 10, the separation mechanism includes a separation frame 13, a support plate 14, a separation rod 15, a separation block 16 and a separation spring 17, and a mounting frame is provided on the armrest 101 The reading device 2 is fixed on the mounting frame, the separation frame 13 is fixed on the mounting frame, the support plate 14 and the separation rod 15 are fixed on the separation frame 13 and extend downward, the separation block 16 is fixed on the outer wall of the ranging sleeve 10, the separation spring 17 is in contact between the support plate 14 and the separation block 16, and the separation block 16 is provided with an extrusion slope on the side facing away from the separation spring 17, and the lower end of the separation rod 15 is provided with an extrusion block 18 on the side facing the separation block 16, and the extrusion block 18 is slidably fitted and in contact with the extrusion slope.

[0028] Working principle: In the utility model, the main body of the rangefinder is placed on the road surface. Under the action of the overall gravity and the action of the telescopic spring 12, the telescopic rod 102 and the handrail 101 are in a retracted state. At this time, the separation mechanism connected to the handrail 101 squeezes the block 18 downward relative to the separation block 16. Under the action of the separation spring 17, the ranging sleeve 10 slides toward the main shaft 4, so that the ratchet teeth of the fixed ratchet ring 6 and the correction ratchet ring 8 engage with each other. When the measuring wheel 3 rotates forward, the fixed ratchet ring 6 and the correction ratchet ring 8 keep rotating synchronously, and then drive the reading device 2 to count through the synchronous belt 11. When the staff makes an error operation and rolls in the opposite direction, the fixed ratchet ring 6 and the correction ratchet ring 8 squeeze each other, causing the correction spring 9 to contract and the correction ratchet ring 8 to jump backward on the fixed ratchet ring 6. The correction ratchet ring 8 will not rotate synchronously with the fixed ratchet ring 6, and the reading device 2 will not count at this time.

[0029] In addition, when the rangefinder body is lifted, the rangefinder wheel, under the action of its own gravity, pulls the telescopic rod 102 and the armrest 101 to extend, thereby pulling the extrusion block 18 upward relative to the separation block 16, and pushing the rangefinder sleeve 10 to slide backward through the inclined extrusion, so that the correction ratchet ring 8 retreats and disengages the ratchet teeth of the fixed ratchet ring 6. When the measuring wheel 3 rotates in the air, the correction ratchet ring 8 and the fixed ratchet ring 6 will not rotate synchronously, and the reading device 2 will not count at this time.

[0030] In summary, the reading device 2 will not read when the staff mistakenly moves backward or the distance measuring wheel rotates, thereby ensuring the accuracy of the counting and avoiding distance measurement errors.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A traffic road distance meter, comprising a distance meter body, the distance meter body comprising a wheel frame, a reading device and a measuring wheel, characterized in that: The lower end of the wheel frame is rotatably connected with a ranging shaft, the measuring wheel is fixed on the ranging shaft, the ranging shaft includes a main shaft and a correction shaft assembly, the wheel frame and the measuring wheel are connected to the main shaft, the correction shaft assembly includes a mounting rod, a fixed ratchet ring, a connecting bolt, a correction ratchet ring, a correction spring and a ranging sleeve, the mounting rod is integrally formed at one end of the main shaft, a spline groove is provided on the side of the mounting rod facing the fixed ratchet ring, the fixed ratchet ring is inserted in the spline groove with a concave-convex fitting, the connecting bolt is connected between the fixed ratchet ring and the mounting rod, the ratchet teeth of the fixed ratchet ring and the correction ratchet ring are engaged with each other, the ranging sleeve is sleeved on the outer wall of the mounting rod, the correction ratchet ring is slidably connected inside the ranging sleeve, the correction spring abuts between the ranging sleeve and the correction ratchet ring, and a synchronous belt is connected between the ranging sleeve and the reading device.

2. A traffic road distance meter according to claim 1, characterized in that: A connecting groove is provided at the bottom of the spline groove, a fixing ring is provided on the inner wall of the fixing ratchet ring, the connecting bolt passes through the fixing ring and is threadedly connected in the connecting groove, and the screw head of the connecting bolt abuts against the fixing ring.

3. A traffic road distance meter according to claim 2, characterized in that: The inner wall of the distance measuring sleeve is provided with a spline slot, and the correction ratchet ring is slidably connected in the spline slot.

4. A traffic road distance meter according to claim 3, characterized in that: The wheel frame comprises an armrest and a telescopic rod, a telescopic slot is arranged at the lower end of the armrest, the top of the telescopic rod is slidably inserted in the telescopic slot, a telescopic spring is connected between the telescopic slot and the telescopic rod, and the main shaft is connected to the lower end of the telescopic rod.

5. A traffic road distance meter according to claim 4, characterized in that: A separation mechanism is connected between the handrail and the ranging sleeve, and the separation mechanism includes a separation frame, a support plate, a separation rod, a separation block and a separation spring. The separation frame is fixed on the handrail, the support plate and the separation rod are fixed on the separation frame and extend downward, the separation block is fixed on the outer wall of the ranging sleeve, the separation spring abuts between the support plate and the separation block, an extrusion slope is provided on the side of the separation block facing away from the separation spring, and an extrusion block is provided on the lower end of the separation rod facing the side of the separation block, and the extrusion block slides and fits against the extrusion slope.

6. A traffic road distance meter according to claim 5, characterized in that: A mounting frame is arranged on the handrail, the reading device is fixed on the mounting frame, and the separation frame is fixed on the mounting frame.

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