Hand-push roller range finder

Abstract

The invention relates to the technical field of distance measuring devices, in particular to a hand-push roller distance measuring instrument which comprises a mounting base, a mounting shaft is mounted in the mounting base, a photoelectric encoder used in cooperation with the mounting shaft is mounted at one end of the mounting base, a main measuring wheel is fixedly mounted at the other end of the mounting shaft, and a push rod mechanism is fixedly connected to the periphery of the mounting base. A control panel is fixedly mounted on the push rod mechanism; an auxiliary measuring wheel and a gully compensation mechanism used in cooperation with the auxiliary measuring wheel are further installed on the periphery of the installation shaft. The diameter of the auxiliary measuring wheel is smaller than that of the main measuring wheel, and the control panel has two metering modes respectively corresponding to the main measuring wheel and the auxiliary measuring wheel; the gully compensation mechanism is used for cooperating with the auxiliary measuring wheel to replace the main measuring wheel to perform rolling measurement when passing through the gully; according to the invention, through dynamic switching between double-wheel cooperative measurement and a gully compensation mechanism, the problem of error increase caused by suspension and sliding of a roller when a traditional roller range finder passes through a gully position is effectively solved.

Description

Technical Field

[0001] The invention relates to the technical field of distance measuring devices, in particular to a hand-pushed roller distance meter. Background Art

[0002] The hand-pushed roller distance meter is a tool that measures distance based on the mechanical rotation of a roller. It is very practical, especially in on-site occasions such as construction and surveying.

[0003] Existing roller distance meters usually consist of a rod with a wheel and an instrument that displays the measurement results. Its working principle is mainly that when the roller rolls on the ground, the internal counting device (usually mechanical or electronic) accumulates the angle or pulse of the roller rotation, thereby calculating the distance traveled. Combined with modern technology, some hand-pushed roller distance meters are also equipped with electronic display screens and digital counting functions (control panels) to improve the accuracy and convenience of measurement.

[0004] However, the existing hand-pushed roller distance meter still has the following shortcomings during use: When using a roller distance meter at a construction surveying site, due to excavation work, digging foundations or drainage ditches and other projects, gullies are often encountered on the ground. When the roller passes through the gully, it may jump or get stuck, and may slide or partially hang in the air, which cannot accurately reflect the actual distance, resulting in underestimation or overestimation of the distance, resulting in increased errors in the measurement results. Summary of the invention

[0005] The purpose of the present invention is to provide a hand-pushed roller distance meter, which aims to solve the problem of measurement error caused by the roller hanging or sliding when encountering gullies on the ground. The device realizes accurate measurement of the gully area through the dual-wheel design of the main measuring wheel and the auxiliary measuring wheel, combined with the gully compensation mechanism and the switchable measurement mode. At the same time, the adjustable design of the push rod mechanism and the support member improves the flexibility and applicability of the operation.

[0006] The purpose of the present invention can be achieved through the following technical solutions: A hand-pushed roller rangefinder comprises a mounting seat, a mounting shaft is rotatably mounted in the mounting seat, a photoelectric encoder used in conjunction with the mounting shaft is mounted on one end of the mounting seat, a main measuring wheel is fixedly mounted on one end of the mounting shaft away from the photoelectric encoder, a push rod mechanism is fixedly connected to the periphery of the mounting seat, a control panel electrically connected to the photoelectric encoder is fixedly mounted on the push rod mechanism near the top; an auxiliary measuring wheel located between the mounting seat and the main measuring wheel is also fixedly mounted on the periphery of the mounting shaft, and a gully compensation mechanism used in conjunction with the auxiliary measuring wheel is rotatably mounted on the periphery of the mounting shaft; The diameter of the auxiliary measuring wheel is smaller than that of the main measuring wheel, and the control panel has two measuring modes corresponding to the main measuring wheel and the auxiliary measuring wheel respectively; The gully compensation mechanism is used to cooperate with the auxiliary measuring wheel to replace the main measuring wheel to perform rolling measurement when passing through the gully.

[0007] Furthermore, the gully compensation mechanism comprises a strip plate, a through groove is provided on the side of the strip plate, a limit slide groove is provided on the top and bottom surfaces of the through groove along the midline of the length direction, and a mounting groove is provided on the top surface of the strip plate and is connected to the limit slide groove above; A clamping wheel is arranged between the two limiting sliding grooves, and the clamping wheel is rotatably installed on the periphery of the mounting shaft, and the clamping wheel is located between the mounting seat and the auxiliary measuring wheel, and the periphery and side surfaces of the clamping wheel are in sliding contact with the inner wall of the limiting sliding groove; The mounting groove is provided with a locking assembly for limiting the sliding of the card wheel; A supporting mechanism is installed on the bottom surface of the strip; A walking mechanism is fixedly connected to the side of the strip plate away from the auxiliary measuring wheel.

[0008] Furthermore, the support mechanism includes a guide rod, the bottom surface of the strip plate is fixedly connected with the vertically arranged guide rod at both ends, the bottom end of the guide rod is slidably inserted with an insertion rod three, and a contact plate is fixedly connected between the bottom ends of the two insertion rods three; A guide plate is provided between the two guide rods and is located directly below the auxiliary measuring wheel, and both ends of the guide plate are connected to the guide rods at corresponding positions in a through-type sliding manner; A switching component is arranged between the strip plate, the guide plate and the abutment plate.

[0009] Furthermore, the switching assembly includes an internal threaded barrel and a connecting column, wherein the connecting column is rotatably mounted at the middle of the bottom surface of the strip plate, and the internal threaded barrel is fixedly mounted on the top surface of the abutment plate, and the internal threaded barrel is located directly below the connecting column; A second handle is installed on the periphery of the connecting column, and a bidirectional screw rod is fixedly connected to the bottom end of the connecting column. The bottom end thread of the bidirectional screw rod penetrates the guide plate and extends into the internal thread barrel, and the bidirectional screw rod and the internal thread barrel are threadedly connected; The top end of the internal threaded barrel and the bottom surface of the guide plate are symmetrically distributed with respect to the middle position of the bidirectional screw rod.

[0010] Furthermore, the top surface of the guide plate is covered with a friction layer 1, and the bottom surface of the contact plate is covered with a friction layer 2.

[0011] Furthermore, the walking mechanism includes a plurality of L-shaped connecting rods fixedly connected to the side of the strip near the bottom, and the plurality of L-shaped connecting rods are distributed in an array along the length direction of the strip; A roller in contact with the ground is rotatably mounted on the bottom end of the L-shaped connecting rod.

[0012] Further, the locking assembly includes a block slidably clamped in the upper limiting chute. A vertically arranged screw rod is fixedly installed on the top surface of the block, and the top end of the screw rod passes through the installation groove to the upper part of the strip board; A threaded ring located above the strip board is threadedly installed on the periphery of the screw rod, and a first handle is fixedly installed on the periphery of the threaded ring.

[0013] Further, the push rod mechanism includes a first hollow rod. One end of the first hollow rod is fixedly connected to the periphery of the mounting base. A first insertion rod is slidably inserted into the end of the first hollow rod away from the mounting base. A handle is fixedly installed at the end of the first insertion rod away from the first hollow rod, and the control panel is fixedly installed on the periphery of the first insertion rod near the handle; A first bolt for restricting the relative sliding between the first insertion rod and the first hollow rod is threadedly installed through the periphery of the first hollow rod at the end away from the mounting base.

[0014] Further, a support member is fixedly connected to the middle position of the periphery of the first hollow rod. The support member includes a second hollow rod obliquely arranged on the first hollow rod. A second insertion rod is slidably inserted into the end of the second hollow rod away from the first hollow rod. A support wheel in contact with the ground is rotatably installed at the end of the second insertion rod away from the first hollow rod; A second bolt for restricting the relative sliding between the second insertion rod and the second hollow rod is threadedly connected through the periphery of the second hollow rod at the end away from the first hollow rod.

[0015] Advantages of the present invention: 1. Through the dynamic switching between the dual-wheel collaborative measurement and the gully compensation mechanism, the present invention effectively solves the problem of increased errors caused by the suspension and sliding of the roller in the traditional roller rangefinder when passing through the gully position, ensuring the measurement continuity in the gully area, and is applicable to scenarios such as building surveying and mapping and engineering exploration.

[0016] 2. During the measurement process of the present invention, the support wheel contacts the ground to support the push rod mechanism. By controlling the support length of the support member, the working angle of the push rod mechanism can be adjusted within a certain range. The adjustable push rod mechanism and the support member reduce the uneven force application caused by the operator's height or terrain differences, and avoid the random errors introduced by the shaking of the traditional fixed push rod. Description of the drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts; Figure 1 It is a schematic structural diagram of the whole of the present invention; Figure 2 is a three-dimensional schematic diagram of the overall structure of the present invention; Figure 3 is Figure 2 a three-dimensional schematic diagram from another angle; Figure 4 is a three-dimensional schematic diagram of the connection relationship between the main measuring wheel, auxiliary measuring wheel, and clamping wheel and the mounting shaft in the present invention; Figure 5 is a three-dimensional schematic diagram of the connection relationship between the gully compensation mechanism and the mounting shaft in the present invention; Figure 6 is Figure 5 a three-dimensional schematic diagram from another angle; Figure 7 is Figure 5 an enlarged view of part A in; Figure 8 is Figure 6 an enlarged view of part D in; Figure 9 is Figure 5 an enlarged view of part C in; Figure 10 is Figure 5 an enlarged view of part B in; Figure 11 is a structural schematic diagram of the connection relationship between the strip board, guide board, and abutting board in the present invention; The reference numerals in the figure are as follows: 1 - main measuring wheel, 2 - push rod mechanism, 3 - support member, 4 - mounting seat, 5 - photoelectric encoder, 6 - auxiliary measuring wheel, 7 - gully compensation mechanism, 8 - control panel, 9 - hollow rod one, 10 - inserting rod one, 11 - handle, 12 - bolt one, 13 - hollow rod two, 14 - bolt two, 15 - inserting rod two, 16 - support wheel, 17 - mounting shaft, 18 - clamping wheel, 19 - strip board, 20 - through groove, 21 - limiting sliding groove, 22 - mounting groove, 23 - guide board, 24 - abutting board, 25 - L-shaped connecting rod, 26 - roller, 27 - threaded ring, 28 - screw rod, 29 - handle one, 30 - internally threaded cylinder, 31 - handle two, 32 - connecting column, 33 - bidirectional lead screw, 34 - guide rod, 35 - inserting rod three, 36 - friction layer one, 37 - friction layer two, 38 - clamping block. Detailed implementation manners

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0019] Example 1: Please refer to Figures 1 to 11 , in the embodiment of the present invention, a hand-pushed roller rangefinder includes a mounting base 4. An installation shaft 17 is rotatably installed through the mounting base 4. One end of the mounting base 4 is installed with an optical encoder 5 used in cooperation with the installation shaft 17. One end of the installation shaft 17 away from the optical encoder 5 is fixedly installed with a main measuring wheel 1. The periphery of the mounting base 4 is fixedly connected with a push rod mechanism 2. A control panel 8 electrically connected to the optical encoder 5 is fixedly installed on the push rod mechanism 2 near the top position; an auxiliary measuring wheel 6 located between the mounting base 4 and the main measuring wheel 1 is also fixedly installed on the periphery of the installation shaft 17, and a gully compensation mechanism 7 used in cooperation with the auxiliary measuring wheel 6 is rotatably installed on the periphery of the installation shaft 17; The diameter of the auxiliary measuring wheel 6 is smaller than that of the main measuring wheel 1. The control panel 8 has two measurement modes corresponding to the main measuring wheel 1 and the auxiliary measuring wheel 6 respectively; The gully compensation mechanism 7 is used to cooperate with the auxiliary measuring wheel 6 to perform rolling measurement instead of the main measuring wheel 1 when passing through a gully.

[0020] Optical encoder: It consists of a light source (such as an LED) and a photodetector (such as a photodiode or a phototube), and is equipped with a wheel (roller) or a grating disk with scales. When the roller rotates, the grating covers or exposes the light beam, generating a pulse signal; each pulse represents the distance unit that the roller has turned. The microcontroller or processing chip on the control panel 8 receives these pulse signals, performs counting and integration. According to the distance unit corresponding to each pulse, the number of pulses is converted into the actual distance; by accumulating the number of pulses, the measured distance is obtained.

[0021] Therefore, this distance measurement technology based on the optical encoder 5 is widely used in various handheld rangefinders and length measurement devices, and it is the prior art.

[0022] In the two measurement modes corresponding to the main measuring wheel 1 and the auxiliary measuring wheel 6 in the present invention (Mode 1 corresponds to the main measuring wheel 1, and Mode 2 corresponds to the auxiliary measuring wheel 6), because the diameters of the main measuring wheel 1 and the auxiliary measuring wheel 6 are different, the distance unit corresponding to each pulse in the two modes is different. During the actual measurement process, when the main measuring wheel 1 performs rolling measurement on the ground, Mode 1 is adopted; When encountering a gully, the gully compensation mechanism 7 passes through the gully on the ground and supports the auxiliary measuring wheel 6, and then switches to Mode 2 through the control panel 8. During the process of passing through the gully, the auxiliary measuring wheel 6 performs rolling measurement, and the main measuring wheel 1 is in a suspended state. The lowest point of the main measuring wheel 1 is still in a position state flush with the ground, thus solving the problem that the measurement error of the existing roller rangefinder increases due to the height difference when passing through a gully.

[0023] Among them, the gully compensation mechanism 7 includes a strip plate 19. A through groove 20 is formed in the side surface of the strip plate 19. Limit sliding grooves 21 are formed along the midlines of the top surface and the bottom surface of the through groove 20 in the length direction. An installation groove 22 communicating with the upper limit sliding groove 21 is formed in the top surface of the strip plate 19; A clamping wheel 18 is arranged between the two limit sliding grooves 21. The clamping wheel 18 is rotatably installed around the installation shaft 17 in a penetrating manner, and the clamping wheel 18 is located between the installation seat 4 and the auxiliary measuring wheel 6. The outer periphery and the side surface of the clamping wheel 18 are in sliding contact with the inner wall of the limit sliding groove 21; A locking assembly for restricting the sliding of the clamping wheel 18 is arranged in the installation groove 22; A support mechanism is installed on the bottom surface of the strip plate 19; A traveling mechanism is fixedly connected to the side surface of the strip plate 19 away from the auxiliary measuring wheel 6.

[0024] Among them, the support mechanism includes guide rods 34. Vertical guide rods 34 are fixedly connected to both ends of the bottom surface of the strip plate 19. The bottom ends of the guide rods 34 are slidably inserted with third insertion rods 35. A contact plate 24 is fixedly connected between the bottom ends of the two third insertion rods 35; A guide plate 23 located directly below the auxiliary measuring wheel 6 is arranged between the two guide rods 34, and both ends of the guide plate 23 are slidably connected to the corresponding guide rods 34 in a penetrating manner; A switching assembly is arranged among the strip plate 19, the guide plate 23 and the contact plate 24.

[0025] Among them, the switching assembly includes an internally threaded cylinder 30 and a connecting column 32. The connecting column 32 is rotatably installed at the middle position of the bottom surface of the strip plate 19. The internally threaded cylinder 30 is fixedly installed on the top surface of the contact plate 24, and the internally threaded cylinder 30 is located directly below the connecting column 32; A second handle 31 is installed around the connecting column 32. The bottom end of the connecting column 32 is fixedly connected with a bidirectional lead screw 33. The bottom end of the bidirectional lead screw 33 threadedly penetrates through the guide plate 23 and then extends into the internally threaded cylinder 30, and the bidirectional lead screw 33 is threadedly connected with the internally threaded cylinder 30; The top end of the internally threaded cylinder 30 and the bottom surface of the guide plate 23 are symmetrically distributed about the middle position of the bidirectional lead screw 33.

[0026] In the switching assembly, the connecting column 32 is driven to rotate by the handle 2 31, and the connecting column 32 drives the bidirectional screw rod 33 to rotate. The rotation of the bidirectional screw rod 33 synchronously drives the guide plate 23 and the contact plate 24 to move closer or away. During normal measurement, the guide plate 23 is in a separated state from the auxiliary measuring wheel 6, and the contact plate 24 is in a separated state from the ground. When the auxiliary measuring wheel 6 is used for rolling measurement, the connecting column 32 is rotated to move the guide plate 23 up and the contact plate 24 down at the same time, so that the guide plate 23 switches to a position state in which it is in extrusion contact with the auxiliary measuring wheel 6 and the contact plate 24 is in extrusion contact with the ground; at this time, the auxiliary measuring wheel 6 can roll on the guide plate 23, and mode 2 is used to replace the main measuring wheel 1 to measure the groove position.

[0027] The walking mechanism includes a plurality of L-shaped connecting rods 25 fixedly connected to the side of the strip 19 near the bottom, and the plurality of L-shaped connecting rods 25 are distributed in an array along the length direction of the strip 19; A roller 26 in contact with the ground is rotatably mounted on the bottom end of the L-shaped connecting rod 25 .

[0028] In the walking mechanism, multiple L-shaped connecting rods 25 are arranged in an array along the length direction of the slat 19, so that when the front end of the gully compensation mechanism 7 passes through the gully, the rollers 26 above the gully are in a suspended state, and the remaining rollers 26 remain in contact with the ground, thereby effectively supporting the gully compensation mechanism 7 and ensuring that the slat 19 is parallel to the ground, which is conducive to the front end of the gully compensation mechanism 7 passing through the gully smoothly.

[0029] Among them, the locking assembly includes a block 38 that is slidably clamped in the upper limiting groove 21, and a vertically arranged screw 28 is fixedly installed on the top surface of the block 38, and the top end of the screw 28 passes through the mounting groove 22 to the top of the strip 19; in the locking assembly, the block 38 can be fixed in the limiting groove 21 by rotating the threaded ring 27 through the handle 29, and the restriction on the block 38 is released when the threaded ring 27 is rotated in the reverse direction, so that the screw 28 can be restricted to the rear end position of the through groove 20 by the block 38 during normal measurement.

[0030] The outer periphery of the screw rod 28 is threadedly mounted with a threaded ring 27 located above the strip plate 19 , and the outer periphery of the threaded ring 27 is fixedly mounted with a handle 29 .

[0031] The push rod mechanism 2 includes a hollow rod 9, one end of which is fixedly connected to the periphery of the mounting seat 4, an insertion rod 10 is slidably inserted into the end of the hollow rod 9 away from the mounting seat 4, a handle 11 is fixedly installed on the end of the insertion rod 10 away from the hollow rod 9, and a control panel 8 is fixedly installed on the periphery of the insertion rod 10 near the handle 11; A bolt 12 for limiting the relative sliding between the insertion rod 10 and the hollow rod 9 is threadedly installed on the outer periphery of the hollow rod 9 at one end away from the mounting seat 4.

[0032] When existing roller distance meters are used at construction surveying sites, due to excavation operations, foundation digging or drainage ditch projects, gullies are often encountered on the ground. When the roller passes through the gully, it may jump or get stuck, and may slide or partially hang in the air, which cannot accurately reflect the actual distance, resulting in underestimation or overestimation of the distance, resulting in increased errors in the measurement results.

[0033] When the present invention is used: The main measuring wheel 1 and the auxiliary measuring wheel 6 work together: The main measuring wheel 1 has a relatively large diameter. When rolling on a flat ground, its rotation drives the photoelectric encoder 5 to generate a pulse signal through the mounting shaft 17, and the distance is calculated by "mode 1" of the control panel 8.

[0034] The auxiliary measuring wheel 6 has a smaller diameter and is located between the main measuring wheel and the mounting seat 4. It is activated when encountering a gully through the gully compensation mechanism 7. At this time, the control panel 8 switches to "mode 2" and recalibrates the distance according to the pulse signal of the auxiliary measuring wheel 6. The dual-wheel design of the main measuring wheel 1 and the auxiliary measuring wheel 6 is combined with different measurement modes to ensure the measurement continuity of the gully area and avoid errors caused by the main measuring wheel 1 being suspended in the air.

[0035] In the gully compensation mechanism 7: In the initial state, the main measuring wheel 1 is in contact with the ground, the clamping wheel 18 is fixed to the rear end of the strip plate 19 by the locking assembly, and the guide plate 23 is separated from the auxiliary measuring wheel 6.

[0036] Trigger switching: When the main measuring wheel 1 is about to enter the gully, the operator rotates the bidirectional screw 33 through the handle 2 31 to drive the guide plate 23 to move up and contact the auxiliary measuring wheel 6, and at the same time the contact plate 24 moves down and contacts the ground.

[0037] Auxiliary measurement: Loosen the locking assembly, the clamping wheel 18 moves forward along the limiting slide groove 21 of the strip plate 19, and the auxiliary measuring wheel 6 rolls on the guide plate 23, and the measurement of the gully section is completed through "mode two".

[0038] In the walking mechanism: the rollers 26 at the bottom of the multiple L-shaped connecting rods 25 support the strip 19 to ensure that it remains horizontal above the gully to avoid measurement deviation caused by tilting.

[0039] Therefore, the groove compensation mechanism 7 in the present invention realizes rapid mode switching through mechanical linkage, and is used in conjunction with the auxiliary measuring wheel 6 to replace the main measuring wheel 1 to measure the groove position, thereby significantly improving the measurement accuracy.

[0040] In the push rod mechanism 2, the hollow rod 9 and the inserting rod 10 are fixed by the bolt 12, and the telescopic design can meet the operation requirements of users with different heights.

[0041] In the locking assembly, by rotating the threaded ring 27 through the handle 29, the position of the locking block 38 in the limiting sliding groove 21 is locked, so as to fix the position of the caster wheel 18 and ensure the stability of the main measuring wheel 1 during normal measurement.

[0042] In the switching assembly, the cooperation of the bidirectional lead screw 33, the internal threaded cylinder 30 and the guide plate 23 realizes the synchronous reverse movement of the guide plate 23 and the abutting plate 24. The operation is simple and the mechanical linkage is reliable. This setting simplifies the mode switching steps, reduces the operation complexity and improves the efficiency.

[0043] Therefore, through the dynamic switching of the dual-wheel collaborative measurement and the gully compensation mechanism 7, the present invention effectively solves the measurement error problem of the traditional roller rangefinder in complex terrains and is applicable to scenarios such as building surveying and mapping and engineering exploration.

[0044] Embodiment 2: Please refer to Figure 11 , on the basis of Embodiment 1, a friction layer 36 is provided on the top surface of the guide plate 23, and a friction layer 37 is provided on the bottom surface of the abutting plate 24.

[0045] Through the setting of the friction layer 36, the sliding friction force between the guide plate 23 and the auxiliary measuring wheel 6 can be increased, avoiding the situation of slippage when the auxiliary measuring wheel 6 rolls on the guide plate 23, which is beneficial to ensuring the measurement accuracy; Through the setting of the friction layer 37, the friction force when the abutting plate 24 contacts the ground is increased, avoiding the situation of displacement of the gully compensation mechanism 7 during the rolling measurement of the auxiliary measuring wheel 6, thereby improving the measurement accuracy.

[0046] Embodiment 3: Please refer to Figure 1 and Figure 2 , on the basis of Embodiment 1, a support member 3 is fixedly connected to the periphery of the hollow rod 9 at the middle position. The support member 3 includes a hollow rod 13 obliquely arranged on the hollow rod 9. A inserting rod 15 is slidably inserted at one end of the hollow rod 13 away from the hollow rod 9, and a support wheel 16 in contact with the ground is rotatably installed at one end of the inserting rod 15 away from the hollow rod 9; A bolt 14 for restricting the relative sliding between the inserting rod 15 and the hollow rod 13 is threadedly connected through the periphery of the hollow rod 13 at a position away from the hollow rod 9.

[0047] In the support member 3, the overall length of the support member 3 can be adjusted through the arrangement of the second insertion rod 15, the second hollow rod 13 and the second bolt 14. During the measurement process, the support wheel 16 contacts the ground to support the push rod mechanism 2. By controlling the support length of the support member 3, the working angle of the push rod mechanism 2 can be adjusted within a certain range. The adjustable push rod mechanism 2 and the support member 3 reduce the uneven force application caused by the operator's height or terrain differences, and avoid the random errors introduced by the shaking of the traditional fixed push rod.

[0048] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A hand-pushed roller distance meter, comprising a mounting seat (4), a mounting shaft (17) being rotatably mounted through the mounting seat (4), a photoelectric encoder (5) for use with the mounting shaft (17) being mounted at one end of the mounting seat (4), a main measuring wheel (1) being fixedly mounted at one end of the mounting shaft (17) away from the photoelectric encoder (5), a push rod mechanism (2) being fixedly connected to the periphery of the mounting seat (4), a control panel (8) being electrically connected to the photoelectric encoder (5) being fixedly mounted on the push rod mechanism (2) near the top; characterized in that: An auxiliary measuring wheel (6) located between the mounting seat (4) and the main measuring wheel (1) is fixedly mounted on the periphery of the mounting shaft (17), and a groove compensation mechanism (7) used in conjunction with the auxiliary measuring wheel (6) is rotatably mounted on the periphery of the mounting shaft (17); The diameter of the auxiliary measuring wheel (6) is smaller than the diameter of the main measuring wheel (1), and the control panel (8) has two measuring modes corresponding to the main measuring wheel (1) and the auxiliary measuring wheel (6) respectively; The gully compensation mechanism (7) is used to cooperate with the auxiliary measuring wheel (6) to replace the main measuring wheel (1) to perform rolling measurement when passing through a gully.

2. A hand-pushed roller distance meter according to claim 1, characterized in that: The gully compensation mechanism (7) comprises a strip plate (19), a through groove (20) is provided on the side of the strip plate (19), a limit slide groove (21) is provided on the top and bottom surfaces of the through groove (20) along the midline of the length direction, and a mounting groove (22) is provided on the top surface of the strip plate (19) and is connected to the limit slide groove (21) above; A clamping wheel (18) is provided between the two limiting sliding grooves (21), and the clamping wheel (18) is rotatably mounted on the periphery of the mounting shaft (17), and the clamping wheel (18) is located between the mounting seat (4) and the auxiliary measuring wheel (6), and the periphery and side surfaces of the clamping wheel (18) are in sliding contact with the inner wall of the limiting sliding groove (21); A locking assembly for limiting the sliding of the clamping wheel (18) is provided in the installation groove (22); A supporting mechanism is installed on the bottom surface of the strip board (19); A walking mechanism is fixedly connected to the side of the strip plate (19) away from the auxiliary measuring wheel (6).

3. A hand-pushed roller distance meter according to claim 2, characterized in that: The support mechanism comprises a guide rod (34), the bottom surface of the strip plate (19) is fixedly connected to the guide rod (34) vertically arranged at both ends, the bottom end of the guide rod (34) is slidably inserted with an insertion rod three (35), and a contact plate (24) is fixedly connected between the bottom ends of the two insertion rods three (35); A guide plate (23) located directly below the auxiliary measuring wheel (6) is provided between the two guide rods (34), and two ends of the guide plate (23) are connected to the guide rods (34) at corresponding positions in a through-type sliding manner; A switching component is provided between the strip plate (19), the guide plate (23) and the abutment plate (24).

4. A hand-pushed roller distance meter according to claim 3, characterized in that: The switching assembly comprises an internally threaded barrel (30) and a connecting column (32), wherein the connecting column (32) is rotatably mounted at a middle position of the bottom surface of the strip plate (19), and the internally threaded barrel (30) is fixedly mounted on the top surface of the abutment plate (24), and the internally threaded barrel (30) is located directly below the connecting column (32); A second handle (31) is installed on the periphery of the connecting column (32), and a bidirectional screw rod (33) is fixedly connected to the bottom end of the connecting column (32). The bottom end thread of the bidirectional screw rod (33) penetrates the guide plate (23) and extends into the internal threaded barrel (30), and the bidirectional screw rod (33) and the internal threaded barrel (30) are threadedly connected. The top end of the internally threaded barrel (30) and the bottom surface of the guide plate (23) are symmetrically distributed about the middle position of the bidirectional screw rod (33).

5. A hand-pushed roller distance meter according to claim 3, characterized in that: The top surface of the guide plate (23) is covered with a friction layer 1 (36), and the bottom surface of the contact plate (24) is covered with a friction layer 2 (37).

6. A hand-pushed roller distance meter according to claim 2, characterized in that: The walking mechanism comprises a plurality of L-shaped connecting rods (25) fixedly connected to the side of the strip board (19) near the bottom, and the plurality of L-shaped connecting rods (25) are distributed in an array along the length direction of the strip board (19); A roller (26) that contacts the ground is rotatably mounted on the bottom end of the L-shaped connecting rod (25).

7. A hand-pushed roller distance meter according to claim 2, characterized in that: The locking assembly comprises a clamping block (38) slidably clamped in the upper limiting sliding groove (21), a vertically arranged screw rod (28) being fixedly mounted on the top surface of the clamping block (38), and a top end of the screw rod (28) passing through the mounting groove (22) to the top of the strip plate (19); The outer periphery of the screw rod (28) is threadedly mounted with a threaded ring (27) located above the strip plate (19), and the outer periphery of the threaded ring (27) is fixedly mounted with a handle 1 (29).

8. A hand-pushed roller distance meter according to claim 1, characterized in that: The push rod mechanism (2) comprises a hollow rod (9), one end of which is fixedly connected to the periphery of the mounting seat (4), an insertion rod (10) is slidably inserted into the end of the hollow rod (9) away from the mounting seat (4), a handle (11) is fixedly installed on the end of the insertion rod (10) away from the hollow rod (9), and the control panel (8) is fixedly installed on the periphery of the insertion rod (10) at a position close to the handle (11); A bolt (12) is threadedly installed on the outer periphery of the hollow rod (9) at an end away from the mounting seat (4) for limiting the relative sliding between the insertion rod (10) and the hollow rod (9).

9. A hand-pushed roller distance meter according to claim 8, characterized in that: The outer periphery of the hollow rod (9) is fixedly connected to a support member (3) at a middle position, the support member (3) comprises a hollow rod (13) obliquely arranged on the hollow rod (9), an insertion rod (15) is slidably inserted at one end of the hollow rod (13) away from the hollow rod (9), and a support wheel (16) contacting the ground is rotatably installed at one end of the insertion rod (15) away from the hollow rod (9); A second bolt (14) is threadedly connected on the outer periphery of the second hollow rod (13) at an end away from the first hollow rod (9) to limit the relative sliding between the second insertion rod (15) and the second hollow rod (13).

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