CN211260175U

CN211260175U - Foot rest convenient to engineering measuring instrument centering

Info

Publication number: CN211260175U
Application number: CN201922499960.8U
Authority: CN
Inventors: 林清辉
Original assignee: Taizhou Vocational and Technical College
Current assignee: Taizhou Vocational and Technical College
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-08-14
Anticipated expiration: 2029-12-31

Abstract

The utility model provides a foot rest convenient to engineering measuring instrument centering belongs to the engineering survey field. It has solved the comparatively loaded down with trivial details problem of centering flattening operation of current engineering measuring instrument. This foot rest convenient to engineering measuring instrument centering, including mount pad, leveling mechanism and a plurality of supporting legs that are used for supporting the mount pad, leveling mechanism includes top dish and the chassis that the upper and lower interval set up, the chassis sets firmly on the mount pad, be equipped with a plurality of adjusting screw between top dish and the chassis, adjusting screw is around the axle center interval equipartition of top dish, the center of top dish is equipped with laser centering device, laser centering device includes base and suspension body, the base has the cavity, the splendid attire has liquid in the cavity, the bottom of suspension body has laser emitter, suspension body suspends in the cavity and makes laser emitter's laser beam vertical down all the time. The utility model discloses only need earlier the centering again the flattening can, easy operation is swift.

Description

Foot rest convenient to engineering measuring instrument centering

Technical Field

The utility model belongs to the engineering survey field relates to a foot rest, especially a foot rest convenient to engineering measuring instrument centering.

Background

When outdoor engineering measuring instruments such as theodolites, levels and the like are used for measurement, the measuring instruments must be centered and leveled first, so that the centers of the instruments and the marking centers of the measuring stations on the bottom surface are on the same plumb line, the vertical axes of the instruments are vertical, and the horizontal dial is horizontal, thereby ensuring the accuracy of measured data.

At present, most measuring instruments are centered by a laser centering device, for example, a laser centering device disclosed in chinese patent application (application No. 200320115810.9), which is fixedly installed on a base of a theodolite, a total station, a distance measuring instrument, a GPS or a target, so that the laser centering device can emit laser downward along a vertical axis direction of the measuring instrument, and a foot stool for fixing the measuring instrument is moved to coincide a laser beam projected downward by the laser centering device with a station mark on the ground, thereby completing centering. However, since the laser centering device is fixedly connected with the measuring instrument, after the theodolite is centered, the theodolite on the foot rest is usually in a non-horizontal state, that is, the actual direction of the laser beam is not the direction of the plumb line, the leveling operation is required at this time, so that the measuring instrument is in a horizontal state, at this time, along with the leveling operation of the theodolite, the direction of the laser beam is changed accordingly, so that the laser beam deviates from the station mark, at this time, the foot rest needs to be centered again, the foot rest needs to be moved for centering, and as the outdoor ground is usually uneven, the measuring instrument on the foot rest is in a non-horizontal state after the centering is performed again, so that the ideal state can be reached by repeatedly performing the.

Therefore, when the conventional measuring instrument is centered and leveled, a beginner usually needs to last 5-10 minutes or more, a middle-skilled person needs 3-5 minutes, and the ground position needs to be changed after about 10 minutes of observation, so that a large amount of time is used for centering and leveling operation, and the overall labor efficiency of mapping is low and the labor comfort is poor.

Disclosure of Invention

The utility model aims at having above-mentioned problem to current technique, provided a foot rest convenient to engineering measuring instrument centering, the utility model aims to solve the technical problem that: how to make the centering and leveling operation of the engineering measuring instrument simpler.

The purpose of the utility model can be realized by the following technical proposal: the utility model provides a foot rest convenient to engineering measuring instrument centering, includes mount pad, leveling mechanism and a plurality of supporting legs that are used for supporting the mount pad, leveling mechanism includes top dish and the chassis that upper and lower interval set up, the chassis sets firmly on the mount pad, be equipped with a plurality of adjusting screw between top dish and the chassis, a serial communication port, adjusting screw is around the axle center interval equipartition of top dish, the center of top dish is equipped with laser centering device, laser centering device includes base and suspensoid, the base has the cavity, the splendid attire has liquid in the cavity, the bottom of suspensoid has laser emitter, suspend in the cavity and make laser emitter's laser beam vertical down all the time.

The laser centering device is arranged on the top disc of the leveling mechanism and basically concentric with the top disc, and the laser centering device is suspended in the base through a suspension body, so that laser projected by the laser centering device is not influenced by the level of the top disc and can be always vertical downwards. The center position of the top disc can be basically kept unchanged in the leveling process, so that the laser projected to the ground and the center of the top disc are basically positioned on the same plumb line. Like this, this foot rest is at centering flattening in-process, only needs earlier the supporting legs to open, places the foot rest on subaerial and open laser centering device, makes the vertical downward projection of laser, then makes laser and subaerial survey station mark coincidence through removing the foot rest, then makes the top dish be in the horizontality through adjusting leveling mechanism, can accomplish centering flattening operation, last only need with the measuring instrument that needs use fixed to the top dish on can, simple and convenient. Moreover, the suspension body is positioned in the base, is not easily influenced by outdoor wind power, and is more convenient to center.

In the above foot rest convenient for centering of the engineering measuring instrument, the foot rest is provided with a light through channel which is vertically arranged and sequentially penetrates through the top plate, the base plate and the mounting seat, and the laser centering device is positioned in the light through channel. The light passing channel is arranged to form abdication on laser emitted by the laser emitter, so that the laser can be projected onto the ground.

In foretell foot rest convenient to engineering measuring instrument centering, the cavity of base is the annular, and the base has opened the hole of stepping down along the axial lead of cavity, the suspension includes the annular portion of suspending that imbeds the cavity, laser emitter is cylindricly, laser emitter is located the axial lead of portion of suspending and wears to locate in the hole of stepping down, the aperture in the hole of stepping down is greater than laser emitter's external diameter. Therefore, the laser transmitter can be ensured to be positioned at the central position of the cavity as much as possible, and the centering precision is ensured.

In the foot rest convenient for centering of the engineering measuring instrument, the inner wall of the outer side of the cavity is arc-shaped, and the outer peripheral surface of the suspension body is also arc-shaped and matched with the outer wall of the cavity. Therefore, the suspension body is convenient to be matched with the cavity, and the suspension body can swing more smoothly relative to the cavity.

In the foot rest convenient for centering of the engineering measuring instrument, the cross sectional area of the abdicating hole is sequentially increased from top to bottom, so that the laser emitter can have a larger free swing space, and when the base is not in a horizontal state, the laser emitter can still keep a vertical state.

In the above foot stool convenient for centering of the engineering measuring instrument, the suspension body is further fixedly provided with a first magnetic member arranged along the circumferential direction of the suspension part, the base is also provided with a second magnetic member arranged around the first magnetic member, and the magnetic poles of the adjacent sides of the first magnetic member and the second magnetic member are the same. Through the repulsion between the first magnetic part and the second magnetic part, the suspension body is not easy to collide with the side wall of the cavity, and therefore centering precision is guaranteed.

In foretell foot rest convenient to engineering measuring instrument centering, laser emitter includes casing, power, switch and laser emission head all with power electric connection, the switch sets up in the top of casing, the one end of keeping away from laser emission head on the switch is located the casing promptly, only need press the switch at casing top during the use can control laser emitter's switch.

In the foot rest convenient for centering of the engineering measuring instrument, a balancing weight is further arranged in the shell and is annular and positioned at the bottom of the shell. The balancing weight enables one end of the shell, which is provided with the laser emitting head, to stably vertically face downwards.

Compared with the prior art, the utility model has the advantages of it is following:

1. the foot rest is provided with the laser centering device on the top plate of the leveling mechanism, and the laser centering device is suspended in the base through the suspension body, so that a laser transmitter arranged on the suspension body can always vertically face downwards and basically be located on a vertical line at the center of the top plate, the laser beam projected to the ground is prevented from deviating from a station measuring mark due to the leveling operation of the top plate, and the centering and leveling operation of the foot rest is simpler and more convenient.

2. The suspension body is located the base, and laser emitter wears to locate and lets downthehole, has avoided laser emitter to receive outdoor wind-force to influence and produce and rock, and centering precision and stability are better.

Drawings

FIG. 1 is a schematic structural diagram of the present invention

FIG. 2 is a schematic structural diagram of the present invention in use with a measuring instrument;

FIG. 3 is a schematic view of the configuration of the leveling mechanism in cooperation with the laser centering device;

FIG. 4 is a schematic structural view of a laser centering device;

fig. 5 is a schematic diagram of a laser transmitter.

In the figure, 1, a mounting seat; 2. supporting legs; 3. a leveling mechanism; 31. a chassis; 32. a top tray; 33. adjusting the screw rod; 4. a measuring instrument; 5. a laser centering device; 6. a base; 61. a cavity; 62. a hole of abdication; 63. a second magnetic member; 7. a suspension; 71. a suspension section; 71a, a first magnetic member; 72. a laser transmitter; 72a, a housing; 72b, a power supply; 72c, a laser emitting head; 72d, a switch; 72e, a balancing weight; 8. and (4) passing through the light channel.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 and 2, a foot rest convenient for centering of an engineering and measurement instrument comprises a mounting base 1, a leveling mechanism 3, a laser centering device 5 and a plurality of supporting feet 2, wherein the supporting feet 2 are connected with the mounting base 1 and used for supporting the mounting base 1, the number of the supporting feet 2 is three, the leveling mechanism 3 comprises a top disc 32 and a bottom disc 31 which are arranged at intervals up and down, wherein, the chassis 31 sets firmly on mount pad 1, is equipped with a plurality of adjusting screw 33 between top dish 32 and the chassis 31, and adjusting screw 33 is around the axle center interval equipartition of top dish 32, and top dish 32 is located the top of this foot rest and is used for measuring instruments 4 such as fixed theodolite, total powerstation, distancer or surveyor's level, has vertical setting on the foot rest and runs through the logical light passageway 8 of top dish 32, chassis 31 and mount pad 1 in proper order, and this laser centering device 5 sets firmly on top dish 32 and is located logical light passageway 8. The laser centering device 5 comprises a base 6 and a suspension body 7, wherein the base 6 is provided with a cavity 61, liquid is contained in the cavity 61, the bottom of the suspension body 7 is provided with a laser emitter 72, and the suspension body 7 is suspended in the cavity 61 so that a laser beam of the laser emitter 72 always faces downwards vertically.

Specifically, as shown in fig. 3 and 4, the base 6 is substantially bowl-shaped, the cavity 61 is annular, the base 6 is further provided with an abdicating hole 62 formed along the axial line of the cavity 61, the cross-sectional area of the abdicating hole 62 is sequentially increased from top to bottom and is flared, the suspension 7 comprises a suspension portion 71 and a laser emitter 72, the suspension portion 71 is annular and is matched with the shape of the cavity 61, the suspension portion 71 is embedded into the cavity 61, the laser emitter 72 is cylindrical, the laser emitter 72 is located on the axial line of the suspension portion 71 and penetrates through the abdicating hole 62, and the aperture of the abdicating hole 62 is larger than the outer diameter of the laser emitter 72, so that when the base 6 is inclined relative to the suspension 7, the abdicating hole 62 can avoid the laser emitter 72, and prevent the laser emitter 72 from abutting against the inner wall of the abdicating hole 62, so that the laser emitter 72 can still maintain a vertical downward state, and the hole 62 of stepping down can form the protection to laser emitter 72, avoids laser emitter 72 to produce because of outdoor wind-force and rocks, improves centering efficiency.

Furthermore, the inner wall of the cavity 61 opposite to the outer peripheral surface of the suspension body 7 is arc-shaped, so that the suspension body 7 can swing relative to the cavity 61 more smoothly.

Further, a first magnetic member 71a is fixedly arranged on the suspension body 7, the first magnetic member 71a is annularly arranged along the circumferential direction of the suspension portion 71, meanwhile, a second magnetic member 63 is also arranged on the base 6, the second magnetic member 63 is positioned on the side wall of the cavity 61 and is arranged around the first magnetic member 71a, the magnetic poles of the adjacent sides of the first magnetic member 71a and the second magnetic member 63 are the same, and the suspension body 7 is positioned in the middle of the cavity 61 and is prevented from contacting with the side wall of the cavity 61 through the repulsive force between the first magnetic member 71a and the second magnetic member 63, so that the centering precision is ensured. In this embodiment, the first magnetic member 71a is a permanent magnet, the second magnetic member 63 can be a permanent magnet or an electromagnet, and the magnetic force between the first magnetic member 71a and the second magnetic member 63 can be designed to be weaker, so that the suspension 7 is not in contact with the sidewall of the cavity 61.

As shown in fig. 5, the laser emitter 72 includes a housing 72a, a power source 72b, a switch 72d, and a laser emitter 72c, the switch 72d and the laser emitter 72c are both electrically connected to the power source 72b, the laser emitter 72c is located at the bottom of the housing 72a, the switch 72d is located at the top of the housing 72a, and the switch 72d protrudes from the top of the suspension 7, in this embodiment, the switch 72d is pressed to control the laser emitter 72. Meanwhile, a counterweight 72e is further arranged in the housing 72a, and the counterweight 72e is annular and is located at the bottom of the housing 72a, so that the laser emitter 72 can be ensured to be in a vertical downward state.

When the foot stand is centered and leveled, the laser emitter 72 is started firstly, then the foot stand is moved, a laser beam is enabled to coincide with a station measuring mark on the ground, then the leveling mechanism 3 is adjusted, the top plate 32 is enabled to be in a horizontal state, and then the measuring instrument 4 is fixed on the top plate 32, so that the measuring work can be carried out, and the foot stand is simple and efficient.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although the terms mounting 1, supporting feet 2, levelling means 3, laser centring device 5, measuring instrument 4 etc. are used more extensively herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims

1. A foot stool convenient for centering of an engineering measuring instrument comprises a mounting seat (1), a leveling mechanism (3) and a plurality of supporting legs (2) used for supporting the mounting seat (1), wherein the leveling mechanism (3) comprises a top disc (32) and a bottom disc (31) which are arranged at an upper interval and a lower interval, the bottom disc (31) is fixedly arranged on the mounting seat (1), a plurality of adjusting screws (33) are arranged between the top disc (32) and the bottom disc (31), the foot stool is characterized in that the adjusting screws (33) are uniformly distributed at intervals around the axis of the top disc (32), a laser centering device (5) is arranged at the center of the top disc (32), the laser centering device (5) comprises a base (6) and a suspending body (7), the base (6) is provided with a cavity (61), liquid is contained in the cavity (61), and a laser emitter (72) is arranged at the bottom of the suspending body (7), the suspension body (7) is suspended in the cavity (61) so that the laser beam of the laser emitter (72) always faces vertically downwards.

2. A foot rest convenient for centering of engineering and measurement instruments according to claim 1, characterized in that the foot rest is provided with a light through channel (8) which is vertically arranged and sequentially penetrates through a top plate (32), a bottom plate (31) and a mounting seat (1), and the laser centering device (5) is positioned in the light through channel (8).

3. The foot rest convenient for centering of engineering measuring instrument according to claim 2, wherein the cavity (61) of the base (6) is annular, the base (6) is provided with a yielding hole (62) along the axial lead of the cavity (61), the suspension body (7) comprises an annular suspension part (71) embedded in the cavity (61), the laser emitter (72) is cylindrical, the laser emitter (72) is positioned on the axial lead of the suspension part (71) and penetrates through the yielding hole (62), and the aperture of the yielding hole (62) is larger than the outer diameter of the laser emitter (72).

4. A foot rest for facilitating the centering of an engineering and measurement instrument according to claim 3, characterized in that the inner wall of the cavity (61) opposite to the outer peripheral surface of the suspension body (7) is arc-shaped.

5. A foot stool for facilitating alignment of engineering and measurement instruments according to claim 3, characterized in that the cross-sectional area of the abdicating hole (62) is sequentially increased from top to bottom.

6. A foot stool convenient for centering of engineering measuring instruments according to claim 3, characterized in that a first magnetic member (71a) arranged along the circumference of the suspension part (71) is further fixedly arranged on the suspension body (7), a second magnetic member (63) arranged around the first magnetic member (71a) is also arranged on the base (6), and the magnetic poles of the adjacent sides of the first magnetic member (71a) and the second magnetic member (63) are the same.

7. A foot stool for facilitating alignment of an engineering and measurement instrument according to claim 3, 5 or 6, wherein the laser emitter (72) comprises a housing (72a), a power source (72b), a switch (72d) and a laser emitting head (72c), the switch (72d) and the laser emitting head (72c) are both electrically connected with the power source (72b), the laser emitting head (72c) is located at the bottom of the housing (72a), and the switch (72d) is located at the top of the housing (72 a).

8. A foot rest for facilitating alignment of an engineering and measurement instrument according to claim 7, characterized in that a weight block (72e) is further provided in the housing (72a), the weight block (72e) being annular and located at the bottom of the housing (72 a).