A hand-pushed wheel rangefinder

Abstract

The present invention relates to the technical field of ranging devices, and specifically to a hand-pushed roller rangefinder. The present invention includes a mounting base, in which a mounting shaft is installed. One end of the mounting base is provided with an optoelectronic encoder for use in cooperation with the mounting shaft. The other end of the mounting shaft is fixedly installed with a main measuring wheel. The periphery of the mounting base is fixedly connected with a push rod mechanism, and a control panel is fixedly installed on the push rod mechanism. An auxiliary measuring wheel is also installed on the periphery of the mounting shaft, as well as a gully compensation mechanism for use in cooperation with the auxiliary measuring wheel. The diameter of the auxiliary measuring wheel is smaller than that of the main measuring wheel. The control panel has two measurement modes respectively corresponding to the main measuring wheel and the auxiliary measuring wheel. The gully compensation mechanism is used to cooperate with the auxiliary measuring wheel to replace the main measuring wheel for rolling measurement when passing through a gully. Through the dynamic switching of the dual-wheel collaborative measurement and the gully compensation mechanism, the present invention effectively solves the problem of increased error caused by the suspension and sliding of the roller when the traditional roller rangefinder passes through a gully position.

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 typically consist of a rod with a wheel and an instrument that displays the measurement results. They operate by calculating the distance traveled by using an internal counting device (usually mechanical or electronic) to accumulate the angles or pulses of the roller's rotation as it rolls across the ground. Incorporating modern technology, some hand-pushed roller distance meters are also equipped with electronic displays and digital counters (control panels), improving measurement accuracy and convenience.

[0004] However, the existing hand-pushed roller distance meter still has the following shortcomings during use:

[0005] When using a roller distance meter at a construction surveying site, due to excavation work, 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. Summary of the Invention

[0006] The present invention aims to provide a hand-pushed roller distance meter that addresses the measurement errors often associated with conventional roller distance meters when encountering gullies. This device utilizes a dual-wheel design consisting of a main measuring wheel and an auxiliary measuring wheel, combined with a gully compensation mechanism and switchable measurement modes, to achieve precise measurement in gully areas. Furthermore, the adjustable push rod mechanism and support components enhance operational flexibility and applicability.

[0007] The purpose of the present invention can be achieved through the following technical solutions:

[0008] A hand-pushed roller rangefinder comprises a mounting base, a mounting shaft rotatably mounted in the mounting base, a photoelectric encoder for use with the mounting shaft mounted on one end of the mounting base, a main measuring wheel fixedly mounted on the end of the mounting shaft remote from the photoelectric encoder, a push rod mechanism fixedly connected to the periphery of the mounting base, a control panel electrically connected to the photoelectric encoder fixedly mounted on the push rod mechanism near the top; an auxiliary measuring wheel located between the mounting base and the main measuring wheel is also fixedly mounted on the periphery of the mounting shaft, and a gully compensation mechanism for use with the auxiliary measuring wheel is rotatably mounted on the periphery of the mounting shaft;

[0009] 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;

[0010] 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.

[0011] Furthermore, the gully compensation mechanism includes a strip plate, a through groove is formed on the side of the strip plate, and a limit sliding groove is formed on the top and bottom surfaces of the through groove along the midline of the longitudinal direction, and a mounting groove is formed on the top surface of the strip plate and is connected to the limit sliding groove above;

[0012] A clamping wheel is provided between the two limiting sliding grooves. The clamping wheel is rotatably mounted on the periphery of the mounting shaft and is located between the mounting seat and the auxiliary measuring wheel. The periphery and side surfaces of the clamping wheel are in sliding contact with the inner wall of the limiting sliding groove.

[0013] A locking assembly for limiting the sliding of the card wheel is provided in the installation groove;

[0014] A supporting mechanism is installed on the bottom surface of the strip;

[0015] A walking mechanism is fixedly connected to the side of the strip away from the auxiliary measuring wheel.

[0016] Furthermore, the support mechanism includes a guide rod, the bottom surface of the strip plate is fixedly connected to 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;

[0017] 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;

[0018] A switching component is provided between the strip plate, the guide plate and the contact plate.

[0019] Furthermore, the switching assembly includes an internal threaded barrel and a connecting column, wherein the connecting column is rotatably mounted on the middle portion of the bottom surface of the strip plate, and the internal threaded barrel is fixedly mounted on the top surface of the contact plate, and the internal threaded barrel is located directly below the connecting column;

[0020] 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 passes through the guide plate and extends into the internal thread barrel, and the bidirectional screw rod and the internal thread barrel are threadedly connected;

[0021] 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.

[0022] Further, a first friction layer is provided on the top surface of the guide plate, and a second friction layer is provided on the bottom surface of the contact plate.

[0023] Further, the traveling mechanism includes a plurality of L-shaped connecting rods fixedly connected to the side surface of the strip near the bottom, and the plurality of L-shaped connecting rods are arranged in an array along the length direction of the strip;

[0024] A roller in contact with the ground is rotatably installed at the bottom end of the L-shaped connecting rod.

[0025] 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;

[0026] A threaded ring located above the strip is threadedly installed on the periphery of the screw rod, and a first handle is fixedly installed on the periphery of the threaded ring.

[0027] 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 seat, a first inserting rod is slidably inserted into the end of the first hollow rod far from the mounting seat, a handle is fixedly installed at the end of the first inserting rod far from the first hollow rod, and the control panel is fixedly installed on the periphery of the first inserting rod near the handle;

[0028] A first bolt for restricting the relative sliding between the first inserting rod and the first hollow rod is threadedly installed through the end of the first hollow rod far from the mounting seat.

[0029] 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 inserting rod is slidably inserted into the end of the second hollow rod far from the first hollow rod, and a support wheel in contact with the ground is rotatably installed at the end of the second inserting rod far from the first hollow rod;

[0030] A second bolt for restricting the relative sliding between the second inserting rod and the second hollow rod is threadedly connected through the end of the second hollow rod far from the first hollow rod.

[0031] Advantages of the present invention:

[0032] 1. Through the dynamic switching of 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 rollers of the traditional roller rangefinder when passing through gully positions, ensuring the measurement continuity in the gully area, and is applicable to scenarios such as building surveying and mapping and engineering exploration.

[0033] 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 differences in the operator's height or terrain, and avoid the random errors introduced by the shaking of the traditional fixed push rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] 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, without creative efforts, other drawings can also be obtained based on these drawings.

[0035] Figure 1 is a schematic structural diagram of the whole of the present invention;

[0036] Figure 2 is a three-dimensional schematic diagram of the overall structure of the present invention;

[0037] Figure 3 is Figure 2 a three-dimensional schematic diagram from another angle;

[0038] Figure 4 is a three-dimensional schematic diagram of the connection relationship between the main measuring wheel, the auxiliary measuring wheel and the clamping wheel and the installation shaft in the present invention;

[0039] Figure 5 is a three-dimensional schematic diagram of the connection relationship between the gully compensation mechanism and the installation shaft in the present invention;

[0040] Figure 6 is Figure 5 a three-dimensional schematic diagram from another angle;

[0041] Figure 7 is Figure 5 an enlarged view of part A in;

[0042] Figure 8 is Figure 6 an enlarged view of part D in;

[0043] Figure 9 is Figure 5 an enlarged view of part C in;

[0044] Figure 10 is Figure 5 an enlarged view of part B in;

[0045] Figure 11 is a schematic structural diagram of the connection relationship between the strip board, the guide board and the abutting board in the present invention;

[0046] The reference numerals in the drawings are as follows:

[0047] 1 - Main measuring wheel, 2 - Push rod mechanism, 3 - Support member, 4 - Mounting base, 5 - Photoelectric encoder, 6 - Auxiliary measuring wheel, 7 - Gully compensation mechanism, 8 - Control panel, 9 - Hollow rod 1, 10 - Insert rod 1, 11 - Handle, 12 - Bolt 1, 13 - Hollow rod 2, 14 - Bolt 2, 15 - Insert rod 2, 16 - Support wheel, 17 - Mounting shaft, 18 - Clamping wheel, 19 - Strip plate, 20 - Through groove, 21 - Limit sliding groove, 22 - Mounting groove, 23 - Guide plate, 24 - Contact plate, 25 - L-shaped connecting rod, 26 - Roller, 27 - Threaded ring, 28 - Screw rod, 29 - Handle 1, 30 - Inner threaded cylinder, 31 - Handle 2, 32 - Connecting column, 33 - Bidirectional lead screw, 34 - Guide rod, 35 - Insert rod 3, 36 - Friction layer 1, 37 - Friction layer 2, 38 - Block. Specific implementation manner

[0048] 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 making creative efforts belong to the scope of protection of the present invention.

[0049] 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 provided with a photoelectric encoder 5 that cooperates with the installation shaft 17. A main measuring wheel 1 is fixedly installed at one end of the installation shaft 17 away from the photoelectric encoder 5. The periphery of the mounting base 4 is fixedly connected with a push rod mechanism 2. A control panel 8 electrically connected to the photoelectric encoder 5 is fixedly installed on the push rod mechanism 2 near the top position; an auxiliary measuring wheel 6 is also fixedly installed on the periphery of the installation shaft 17 between the mounting base 4 and the main measuring wheel 1, and a gully compensation mechanism 7 that cooperates with the auxiliary measuring wheel 6 is rotatably installed on the periphery of the installation shaft 17;

[0050] 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;

[0051] The gully compensation mechanism 7 is used to cooperate with the auxiliary measuring wheel 6 to replace the main measuring wheel 1 for rolling measurement when passing through a gully.

[0052] 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 with scales (roller) or a grating disk. When the roller rotates, the grating covers or exposes the light beam, generating pulse signals; 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.

[0053] Therefore, this distance measurement technology based on the optical encoder 5 is widely used in various handheld rangefinders and length measurement devices, which is the prior art.

[0054] In the two measurement modes corresponding to the main measurement wheel 1 and the auxiliary measurement wheel 6 in the present invention (Mode 1 corresponds to the main measurement wheel 1, and Mode 2 corresponds to the auxiliary measurement wheel 6), since the diameters of the main measurement wheel 1 and the auxiliary measurement 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 measurement wheel 1 rolls on the ground for measurement, Mode 1 is adopted;

[0055] When encountering a gully, the gully compensation mechanism 7 passes through the gully on the ground and supports the auxiliary measurement wheel 6, and then switches to Mode 2 through the control panel 8. During the process of passing through the gully, the auxiliary measurement wheel 6 performs rolling measurement, and the main measurement wheel 1 is in a suspended state. The lowest point of the main measurement wheel 1 remains in a position 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.

[0056] Among them, the gully compensation mechanism 7 includes a strip plate 19. A through groove 20 is opened on the side surface of the strip plate 19. Limiting sliding grooves 21 are opened 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 limiting sliding groove 21 is opened on the top surface of the strip plate 19;

[0057] A clamping wheel 18 is arranged between the two limiting 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 mounting seat 4 and the auxiliary measurement wheel 6. The outer periphery and the side surface of the clamping wheel 18 are in sliding contact with the inner wall of the limiting sliding groove 21;

[0058] A locking assembly for restricting the sliding of the clamping wheel 18 is arranged in the installation groove 22;

[0059] A support mechanism is installed on the bottom surface of the strip plate 19;

[0060] A walking mechanism is fixedly connected to the side surface of the strip plate 19 away from the auxiliary measurement wheel 6.

[0061] 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 plug rods 35. A contact plate 24 is fixedly connected between the bottom ends of the two third plug rods 35;

[0062] A guide plate 23 is arranged between the two guide rods 34 and is directly below the auxiliary measuring wheel 6. The two ends of the guide plate 23 are slidably connected to the corresponding guide rods 34 in a penetrating manner;

[0063] A switching component is arranged among the strip plate 19, the guide plate 23 and the contact plate 24.

[0064] Among them, the switching component 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 is directly below the connecting column 32;

[0065] A handle two 31 is installed on the periphery of 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;

[0066] 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.

[0067] In the switching component, the handle two 31 drives the connecting column 32 to rotate. The connecting column 32 drives the bidirectional lead screw 33 to rotate. The rotation of the bidirectional lead screw 33 synchronously drives the guide plate 23 and the contact plate 24 to move closer to or away from each other. During normal measurement, the guide plate 23 is separated from the auxiliary measuring wheel 6, and the contact plate 24 is separated from the ground. When using the auxiliary measuring wheel 6 for rolling measurement, the connecting column 32 is rotated to move the guide plate 23 upward and the contact plate 24 downward at the same time, so that the guide plate 23 is switched to a position state where it is in pressing contact with the auxiliary measuring wheel 6, and the contact plate 24 is in pressing contact with the ground; at this time, the auxiliary measuring wheel 6 can roll on the guide plate 23, and the measurement of the gully position is replaced by mode two.

[0068] Among them, the traveling mechanism includes a plurality of L-shaped connecting rods 25 fixedly connected to the side surface of the strip plate 19 near the bottom. The plurality of L-shaped connecting rods 25 are arranged in an array along the length direction of the strip plate 19;

[0069] The bottom end of the L-shaped connecting rod 25 is rotatably installed with a roller 26 in contact with the ground.

[0070] In the traveling mechanism, a plurality of L-shaped linkages 25 arranged in an array along the length direction of the strip 19 enable the front end of the gully compensation mechanism 7 to be in a suspended state when passing through a gully, and the remaining rollers 26 remain in contact with the ground, so as to effectively support the gully compensation mechanism 7 and ensure that the strip 19 is in a state parallel to the ground, which is beneficial for the front end of the gully compensation mechanism 7 to smoothly pass through the gully.

[0071] Among them, the locking assembly includes a block 38 slidably clamped in the upper limiting chute 21. 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 installation groove 22 to the upper part of the strip 19; in the locking assembly, by rotating the threaded ring 27 with the handle 29, the block 38 can be fixed in the limiting chute 21, 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 at the rear end position of the through groove 20 by the block 38 during normal measurement.

[0072] A threaded ring 27 located above the strip 19 is threadedly installed on the outer periphery of the screw 28, and a handle 29 is fixedly installed on the outer periphery of the threaded ring 27.

[0073] Among them, the push rod mechanism 2 includes a hollow rod 9. One end of the hollow rod 9 is fixedly connected to the outer 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 at the end of the insertion rod 10 away from the hollow rod 9, and a control panel 8 is fixedly installed on the outer periphery of the insertion rod 10 near the handle 11.

[0074] A bolt 12 for restricting the relative sliding between the insertion rod 10 and the hollow rod 9 is threadedly installed through the outer periphery of the hollow rod 9 at the end away from the mounting seat 4.

[0075] When the existing roller rangefinder is used at the construction surveying and mapping site, due to engineering such as excavation operations, excavation of foundations or drainage ditches, gullies often occur on the ground. When the roller passes through a gully, phenomena such as jumping or jamming may occur, and it may slide or be partially suspended, unable to accurately reflect the actual distance, resulting in underestimation or overestimation of the distance and an increase in the error of the measurement result.

[0076] And when the present invention is used:

[0077] The main measuring wheel 1 and the auxiliary measuring wheel 6 work together:

[0078] The main measuring wheel 1 has a larger diameter. When rolling on a flat ground, its rotation drives the photoelectric encoder 5 through the mounting shaft 17 to generate a pulse signal, and the distance is calculated by the "mode one" of the control panel 8.

[0079] The diameter of the auxiliary measuring wheel 6 is relatively small. It is located between the main measuring wheel and the mounting base 4 and is enabled by the gully compensation mechanism 7 when encountering a gully. At this time, the control panel 8 switches to "Mode 2" and recalibrates the distance according to the pulse signal of the rotation of the auxiliary measuring wheel 6. Through the dual-wheel design of the main measuring wheel 1 and the auxiliary measuring wheel 6 and different measurement modes, the measurement continuity in the gully area is ensured, and the error caused by the suspension of the main measuring wheel 1 is avoided.

[0080] In the gully compensation mechanism 7:

[0081] 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 19 by the locking assembly, and the guide plate 23 is separated from the auxiliary measuring wheel 6.

[0082] Trigger switching: When the main measuring wheel 1 is about to enter a gully, the operator rotates the bidirectional lead screw 33 through the handle 2 31, driving the guide plate 23 to move upward to contact the auxiliary measuring wheel 6, and at the same time the contact plate 24 moves downward to contact the ground.

[0083] Auxiliary measurement: Loosen the locking assembly, the clamping wheel 18 moves forward along the limit chute 21 of the strip 19, and the auxiliary measuring wheel 6 rolls on the guide plate 23, and the measurement of the gully section is completed through "Mode 2".

[0084] In the traveling mechanism: The rollers 26 at the bottom of multiple L-shaped connecting rods 25 support the strip 19 to ensure that it remains horizontal above the gully and avoid measurement deviation caused by tilting.

[0085] Therefore, the gully compensation mechanism 7 in the present invention realizes rapid mode switching through mechanical linkage, cooperates with the auxiliary measuring wheel 6, replaces the main measuring wheel 1 to measure the position of the gully, and significantly improves the measurement accuracy.

[0086] In the push rod mechanism 2, the hollow rod 1 9 and the insertion rod 1 10 are fixed by the bolt 1 12, and the telescopic design adapts to the operation requirements of users with different heights.

[0087] In the locking assembly, by rotating the threaded ring 27 through the handle 1 29, the position of the locking block 38 in the limit chute 21 is locked, thereby fixing the position of the clamping wheel 18 and ensuring the stability of the main measuring wheel 1 during normal measurement.

[0088] In the switching assembly, the cooperation of the bidirectional lead screw 33 with the internal threaded cylinder 30 and the guide plate 23 realizes the synchronous reverse movement of the guide plate 23 and the contact 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.

[0089] Therefore, through the dual-wheel collaborative measurement and the dynamic switching of the gully compensation mechanism 7 in the present invention, the measurement error problem of traditional roller rangefinders in complex terrains is effectively solved, and it is applicable to scenarios such as building surveying and mapping and engineering exploration.

[0090] Example 2: Please refer to Figure 11 On the basis of embodiment 1, 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 .

[0091] The friction layer 1 36 can improve the sliding friction between the guide plate 23 and the auxiliary measuring wheel 6, thereby preventing the auxiliary measuring wheel 6 from slipping when rolling on the guide plate 23, thereby ensuring measurement accuracy.

[0092] The second friction layer 37 increases the friction force of the contact plate 24 when in contact with the ground, thereby preventing the displacement of the groove compensation mechanism 7 during the rolling measurement of the auxiliary measuring wheel 6, thereby improving the measurement accuracy.

[0093] Example 3: Please refer to Figure 1 and Figure 2 On the basis of Example 1, a support member 3 is fixedly connected to the outer periphery of the hollow rod 1 9 at a central position. The support member 3 includes a hollow rod 2 13 obliquely placed on the hollow rod 1 9. An insertion rod 2 15 is slidably inserted at the end of the hollow rod 2 13 away from the hollow rod 1 9. A support wheel 16 that contacts the ground is rotatably installed at the end of the insertion rod 2 15 away from the hollow rod 1 9.

[0094] On the outer periphery of the hollow rod 13, at one end away from the hollow rod 19, a bolt 14 is threadedly connected thereto for limiting the relative sliding between the insertion rod 15 and the hollow rod 13.

[0095] The overall length of the support member 3 can be adjusted by setting the inserted rod 2 15, the hollow rod 2 13 and the bolt 2 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 applied by the operator due to differences in height or terrain, and avoid random errors introduced by shaking of the traditional fixed push rod.

[0096] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. A hand - pushed roller rangefinder, comprising a mounting base (4), in which a mounting shaft (17) is rotatably installed in a through - hole manner. One end of the mounting base (4) is installed with an optoelectronic encoder (5) used in cooperation with the mounting shaft (17). A main measuring wheel (1) is fixedly installed at one end of the mounting shaft (17) away from the optoelectronic encoder (5). The periphery of the mounting base (4) is fixedly connected with a push - rod mechanism (2), and a control panel (8) electrically connected to the optoelectronic encoder (5) is fixedly installed on the push - rod mechanism (2) near the top position; 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 gully 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); The gully compensation mechanism (7) is used to cooperate with the auxiliary measuring wheel (6) to replace the main measuring wheel (1) in performing rolling measurement when passing through a gully; The gully compensation mechanism (7) includes a strip plate (19), a through groove (20) is provided on the side of the strip plate (19), and a limiting sliding groove (21) is provided on the top and bottom surfaces of the through groove (20) along the midline of the longitudinal direction, and a mounting groove (22) is provided on the top surface of the strip plate (19) and is connected to the limiting sliding 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). 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 mounting 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).

2. The hand-pushed roller rangefinder according to claim 1, wherein The support mechanism includes a guide rod (34), the bottom surface of the strip plate (19) is fixedly connected to the vertically arranged guide rod (34) at both ends, the bottom end of the guide rod (34) is slidably inserted with a third insertion rod (35), and a contact plate (24) is fixedly connected between the bottom ends of the two third insertion rods (35); A guide plate (23) is provided between the two guide rods (34) and is located directly below the auxiliary measuring wheel (6), and both ends of the guide plate (23) are connected to the guide rods (34) at corresponding positions in a through-type sliding manner; A switching assembly is provided between the strip plate (19), the guide plate (23) and the contact plate (24).

3. The push-roller rangefinder according to claim 2, wherein, The switching assembly comprises an internal threaded barrel (30) and a connecting column (32), wherein the connecting column (32) is rotatably mounted on the middle portion of the bottom surface of the strip plate (19), and the internal threaded barrel (30) is fixedly mounted on the top surface of the contact plate (24), and the internal 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) passes through 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).

4. The hand-pushed roller rangefinder according to claim 2, characterized in that, The top surface of the guide plate (23) is covered with a first friction layer (36), and the bottom surface of the contact plate (24) is covered with a second friction layer (37).

5. The hand-pushed roller rangefinder according to claim 1, wherein, The traveling mechanism includes a plurality of L-shaped connecting rods (25) fixedly connected to the side surface of the strip plate (19) near the bottom, and the plurality of L-shaped connecting rods (25) are arranged in an array along the length direction of the strip plate (19); A roller (26) in contact with the ground is rotatably installed at the bottom end of the L-shaped connecting rod (25).

6. The push-roller rangefinder according to claim 1, characterized in that, The locking assembly includes a block (38) slidably clamped in the upper limiting chute (21), a vertically arranged screw rod (28) is fixedly installed on the top surface of the block (38), and the top end of the screw rod (28) passes through the installation groove (22) to the upper part of the strip plate (19); A threaded ring (27) located above the strip plate (19) is threadedly installed on the periphery of the screw rod (28), and a first handle (29) is fixedly installed on the periphery of the threaded ring (27).

7. A hand-pushed roller rangefinder according to claim 1, characterized in that, The push rod mechanism (²) includes a first hollow rod (9), one end of the first hollow rod (9) is fixedly connected to the periphery of the mounting seat (4), a first inserting rod (10) is slidably inserted into the end of the first hollow rod (9) away from the mounting seat (4), a handle (11) is fixedly installed at the end of the first inserting rod (10) away from the first hollow rod (9), and the control panel (8) is fixedly installed on the periphery of the first inserting rod (10) near the handle (11); A first bolt (12) for restricting the relative sliding between the first inserting rod (10) and the first hollow rod (9) is threadedly installed through the end of the first hollow rod (9) away from the mounting seat (4).

8. The hand-pushed roller rangefinder according to claim 7, wherein, A support member (3) is fixedly connected to the middle position of the periphery of the first hollow rod (9), the support member (3) includes a second hollow rod (13) obliquely arranged on the first hollow rod (9), a second inserting rod (15) is slidably inserted into the end of the second hollow rod (13) away from the first hollow rod (9), and a support wheel (16) in contact with the ground is rotatably installed at the end of the second inserting rod (15) away from the first hollow rod (9); A second bolt (14) for restricting the relative sliding between the second inserting rod (15) and the second hollow rod (13) is threadedly connected through the end of the second hollow rod (13) away from the first hollow rod (9).

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