Portable distance measuring device for engineering surveying

Abstract

The invention discloses a portable distance measuring device for engineering surveying, and relates to the technical field of engineering surveying, the portable distance measuring device comprises a supporting table, a laser distance measuring instrument body for engineering surveying is arranged at the top of the supporting table close to the center, and fixing assemblies are arranged at the top of the supporting table close to four corners. According to the portable distance measuring device for engineering surveying, after the distance measuring device for engineering surveying finishes measurement, a plurality of insertion pipes are moved out from the interiors of insertion holes, then four protection plates are rotated to be attached to the inner walls of four movable rods, then limiting of the movable rods and extension plates is relieved, a bearing block is pushed in the direction of a mounting plate, and the distance measuring device for engineering surveying can conveniently measure the distance between the movable rods and the extension plates. When the distance measuring device is used, the movable rod and the extension plate are reset and then rotated to the position perpendicular to the supporting table, the protective cover can be arranged among the outer surfaces of the four mounting plates in a sleeving mode, storage of the distance measuring device for engineering surveying is achieved, and the problem that in the prior art, the distance measuring device for engineering surveying is large in size and inconvenient to carry is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering surveying, and specifically relates to a portable distance measuring device for engineering surveying. Background Technique

[0002] As an important distance measuring instrument in the process of engineering surveying, a rangefinder can achieve high-precision distance measurement by utilizing the characteristics of laser. Compared with traditional measuring tools, its error is smaller and can be accurate to the millimeter level or even higher. This is crucial for engineering surveys that require high precision. For example, in building construction, accurately measuring parameters such as the size and spacing of buildings can ensure the quality and safety of the project. In road engineering, accurately measuring the length, width, and slope of the road provides reliable data support for road design and construction.

[0003] Currently, however, the existing laser distance measuring devices for engineering surveying mainly consist of a rangefinder and components for supporting and installing the rangefinder. Placing the rangefinder on a bracket can free the hands, allowing the surveyor to operate and record data more easily. At the same time, it can also avoid measurement errors caused by hand fatigue. To ensure the stability of the rangefinder during use, the bracket needs to have a certain size and structural strength. And to improve the stability of the distance measuring device, a multi-legged tripod design is required. Although this design can meet the needs of different measurement scenarios, it also makes the volume of the bracket relatively large. The lengths of each leg tube and the dimensions of the connection parts will also occupy a certain space in the storage state, making it inconvenient to carry by hand and not convenient for the staff to carry.

[0004] Therefore, we propose a portable distance measuring device for engineering surveying to solve the problems mentioned above. Summary of the Invention

[0005] The purpose of the present invention is to provide a portable distance measuring device for engineering surveying to solve the problem that the distance measuring device for engineering surveying in the above background technique is large in volume and inconvenient to carry.

[0006] To achieve the above object, the present invention provides the following technical solution: A portable ranging device for engineering survey, including a support platform. A laser rangefinder body for engineering survey is arranged near the center of the top of the support platform. Fixing components are arranged near the four corners of the top of the support platform. A portable component is arranged between the outer surfaces of the fixing components. Four telescopic components are arranged on the outer surface of the support platform. Each of the four telescopic components includes a mounting plate. Positioning grooves are formed on the outer surface of one side of each of the four mounting plates. Rectangular grooves are formed on the outer surface of the other side of each of the four mounting plates. Compression plates are fixedly embedded in the interiors of the four rectangular grooves. Mounting frames are fixedly connected to the outer surfaces of the four compression plates. Reversible motors are fixedly installed on the outer surfaces of the four mounting frames by screws. The output shafts of the four reversible motors are fixedly connected with lead screws. Moving rods are threadedly sleeved on the outer surfaces of the four lead screws. Insertion tubes are fixedly connected to the outer surfaces of the four moving rods near both ends. Moving rods are slidably connected to the interiors of the four rectangular grooves. Two jacks are formed on the outer surface of each of the four moving rods. Extension plates are slidably embedded in the interiors of the four moving rods.

[0007] Preferably, a plurality of mounting grooves are formed on the outer surface of each of the four extension plates. Springs are arranged on the inner walls of the plurality of mounting grooves. One ends of the plurality of springs are provided with pressing buckles. A protective plate is rotatably connected between the opposite inner walls of the four moving rods by hinges. Load-bearing blocks are fixedly installed at one ends of the four moving rods.

[0008] Preferably, four limiting tubes are fixedly connected between the opposite inner walls of the support platform. The outer surfaces of the four limiting tubes are respectively rotatably connected to the inner walls of the four mounting plates. Positioning rods are fixedly arranged near the four edges of the top of the support platform. One ends of the four lead screws respectively extend out of the exteriors of the four mounting frames.

[0009] Preferably, every two adjacent ones of the eight insertion tubes are in a group. One ends of each group of insertion tubes respectively extend into the interiors of the four mounting plates. Every two adjacent ones of the eight jacks are in a group. One ends of each group of insertion tubes respectively extend into the interiors of each group of jacks. The four moving rods respectively extend out of the exteriors of the four compression plates.

[0010] Preferably, one ends of the plurality of springs are respectively fixedly connected to the inner walls of the plurality of mounting grooves. The other ends of the plurality of springs are respectively fixedly connected to the outer surfaces of the plurality of pressing buckles. The outer surfaces of the four extension plates respectively extend out of the exteriors of the four moving rods.

[0011] Preferably, a mounting sleeve is fixedly connected to the bottom of the support platform near the center by screws. A controller is arranged near one edge of the top of the support platform. Each of the four fixing components includes a telescopic rod. The bottom ends of the four telescopic rods are fixedly connected to the top of the support platform.

[0012] Preferably, lifting tubes are fixedly connected to the tops of the four telescopic rods. Tensile blocks are fixedly sleeved on the outer surfaces of the four lifting tubes. Rotating grooves are formed at the tops of the four lifting tubes.

[0013] Preferably, rotating blocks are rotatably connected to the interiors of the four rotating grooves. One ends of the four rotating blocks respectively penetrate outside the four rotating grooves movably. Positioning blocks are fixedly installed at one ends of the four rotating blocks.

[0014] Preferably, the portable assembly includes a protective cover. Four limiting grooves are formed in the outer surface of the protective cover. Anti-slip pads are arranged on the opposite inner walls of the four limiting grooves. A handle is fixedly installed near the center of the top of the protective cover.

[0015] Preferably, card slots are formed near the four edges of the top of the protective cover. Two limiting frames are fixedly installed at the top of each card slot. The bottoms of the multiple limiting frames are fixedly connected to the top of the protective cover.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. After the distance measuring device for engineering surveying finishes the measurement, move the multiple inserting tubes out of the jacks, and then rotate the four protective plates to fit with the inner walls of the four movable rods, thereby releasing the limitation on the movable rods and the extension plates. Push the bearing block towards the mounting plate to reset the movable rods and the extension plates, and then rotate them to a position perpendicular to the support table. Then, the protective cover can be sleeved between the outer surfaces of the four mounting plates, which realizes the storage of the distance measuring device for engineering surveying and solves the problem that the distance measuring device for engineering surveying in the prior art is large in volume and inconvenient to carry.

[0018] 2. In order to prevent the distance measuring device from unfolding during the movement, after the protective cover is sleeved, move the four positioning blocks to the outer surfaces of the card slots respectively, and rotate the four positioning blocks so that the positioning blocks coincide with the top views of the card slots, and then rotate the four positioning blocks between the interiors of every two opposite limiting frames respectively. The four positioning blocks can move downward between the interiors of every two opposite limiting frames under the action of their own gravity, thereby realizing the positioning between the support table and the protective cover, and further facilitating the carrying of the distance measuring device.

[0019] 3. To ensure the stability of the support structure of the ranging device after extension, when the movable rod and the extension plate are fully extended, four forward and reverse motors are started respectively to drive each group of insertion tubes to be inserted into the corresponding jacks, which not only fixes the movable rod, and then rotates the four protective plates respectively to separate the outer surface of each protective plate from the inner wall of the movable rod, so that multiple pressing buckles move outward along the movable rod under the elastic action of the springs respectively, thereby positioning the four extension plates. By positioning the movable rod and the extension plate, the stability during the use of the portable engineering survey ranging device is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the front perspective view of the portable ranging device for engineering survey of the present invention;

[0021] Figure 2 is the side perspective view of the portable ranging device for engineering survey of the present invention;

[0022] Figure 3 is the unfolded perspective view of the partial structure of the protective cover of the portable ranging device for engineering survey of the present invention;

[0023] Figure 4 is the perspective view of the partial structure of the support platform of the portable ranging device for engineering survey of the present invention;

[0024] Figure 5 is the perspective view of the partial structure of the laser rangefinder body of the portable ranging device for engineering survey of the present invention;

[0025] Figure 6 is the sectional perspective view of the positioning rod part of the portable ranging device for engineering survey of the present invention;

[0026] Figure 7 is the sectional perspective view of the mounting plate part of the portable ranging device for engineering survey of the present invention;

[0027] Figure 8 of the present invention Figure 7 is the enlarged view at A in

[0028] Figure 9 is the sectional perspective view of the unfolded partial structure of the pressure-resistant plate of the portable ranging device for engineering survey of the present invention;

[0029] Figure 10 is the sectional perspective view of the movable rod part of the portable ranging device for engineering survey of the present invention;

[0030] Figure 11 is the sectional perspective view of the extension plate part of the portable ranging device for engineering survey of the present invention;

[0031] Figure 12Stereogram of the handle part of the portable distance measuring device for engineering survey of the present invention;

[0032] Figure 13 For the present invention Figure 12 Enlarged view of part B in

[0033] Figure 14 Sectional stereogram of the lifting tube part of the portable distance measuring device for engineering survey of the present invention;

[0034] Figure 15 For the present invention Figure 14 Enlarged view of part C in

[0035] In the figure:

[0036] 1. Support platform; 2. Installation sleeve; 3. Laser rangefinder body; 4. Limiting tube; 5. Positioning rod; 6. Telescopic assembly; 601. Installation plate; 602. Positioning groove; 603. Rectangular groove; 604. Compression plate; 605. Installation frame; 606. Reversible motor; 607. Lead screw; 608. Moving rod; 609. Insertion tube; 610. Movable rod; 611. Insertion hole; 612. Extension plate; 613. Installation groove; 614. Spring; 615. Extrusion buckle; 616. Protection plate; 617. Bearing block; 7. Portable assembly; 701. Protection cover; 702. Limiting groove; 703. Handle; 704. Anti-slip pad; 705. Card slot; 706. Limiting frame; 8. Fixing assembly; 801. Telescopic rod; 802. Lifting tube; 803. Tensile block; 804. Rotating groove; 805. Rotating block; 806. Positioning block; 9. Controller. Detailed implementation manners

[0037] 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 shall fall within the protection scope of the present invention.

[0038] Please refer to Figure 1-15, the present invention provides a technical solution: a portable ranging device for engineering survey, including a support platform 1. A laser rangefinder body 3 for engineering survey is provided near the center of the top of the support platform 1. Fixing components 8 are provided near the four corners of the top of the support platform 1. A portable component 7 is arranged between the outer surfaces of the fixing components 8. Four telescopic components 6 are arranged on the outer surface of the support platform 1. Each of the four telescopic components 6 includes a mounting plate 601. Positioning grooves 602 are formed on the outer surface of one side of the four mounting plates 601,Rectangular grooves 603 are formed on the outer surfaces of the other sides of the four mounting plates 601. Compression plates 604 are fixedly embedded inside the four rectangular grooves 603. Mounting frames 605 are fixedly connected to the outer surfaces of the four compression plates 604. Reversible motors 606 are fixedly installed on the outer surfaces of the four mounting frames 605 by screws. The output shafts of the four reversible motors 606 are fixedly connected with lead screws 607. Moving rods 608 are threadedly sleeved on the outer surfaces of the four lead screws 607. Insertion tubes 609 are fixedly connected to the outer surfaces of the four moving rods 608 near both ends. Movable rods 610 are slidably connected inside the four rectangular grooves 603. Two jacks 611 are formed on the outer surfaces of the four movable rods 610. Extension plates 612 are slidably embedded inside the four movable rods 610. Multiple mounting grooves 613 are formed on the outer surfaces of the four extension plates 612. Springs 614 are arranged on the inner walls of the multiple mounting grooves 613. One ends of the multiple springs 614 are provided with extrusion buckles 615. Protective plates 616 are rotatably connected between the opposite inner walls of the four movable rods 610 by hinges. Bearing blocks 617 are fixedly installed at one ends of the four movable rods 610. Four limiting tubes 4 are fixedly connected between the opposite inner walls of the support table 1. The outer surfaces of the four limiting tubes 4 are rotatably connected to the inner walls of the four mounting plates 601 respectively. Positioning rods 5 are fixed at the top of the support table 1 near the four edges. One ends of the four lead screws 607 respectively extend out of the four mounting frames 605. Every two adjacent ones of the eight insertion tubes 609 form a group. One ends of each group of insertion tubes 609 respectively extend into the four mounting plates 601. Every two adjacent ones of the eight jacks 611 form a group. One ends of each group of insertion tubes 609 respectively extend into each group of jacks 611. The four movable rods 610 respectively extend out of the four compression plates 604. One ends of the multiple springs 614 are fixedly connected to the inner walls of the multiple mounting grooves 613 respectively. The other ends of the multiple springs 614 are fixedly connected to the outer surfaces of the multiple extrusion buckles 615 respectively. The outer surfaces of the four extension plates 612 respectively extend out of the four movable rods 610. The portable component 7 includes a protective cover 701. Four limiting grooves 702 are formed on the outer surface of the protective cover 701. Anti-slip pads 704 are arranged on the opposite inner walls of the four limiting grooves 702. A handle 703 is fixedly installed at the top of the protective cover 701 near the center. Card slots 705 are formed at the top of the protective cover 701 near the four edges. Two limiting frames 706 are fixedly installed at the top of each card slot 705. The bottoms of the multiple limiting frames 706 are fixedly connected to the top of the protective cover 701.,

[0039] In the present invention, during the engineering survey process, in order to facilitate the measurement of the distance between two objects, a distance measuring device is often used for measurement. In order to facilitate the staff to carry and deploy the distance measuring device, first, the handle 703 is lifted upward to convey the distance measuring device to a designated position, and then the four positioning blocks 806 are respectively lifted upward and rotated so that each positioning block 806 rotates to the outside of each two relatively arranged card slots 705 and coincides with the top of the card slot 705. Among them, as Figure 15As shown, the cross-section of the rotating groove 804 is consistent with that of the rotating block 805, both of which are T-shaped. The purpose is to facilitate the rotation of the rotating block 805 while limiting its position. When the four positioning blocks 806 are respectively rotated to coincide with their corresponding card slots 705, the protective cover 701 can be lifted upward, so that the protective cover 701 is separated from the four mounting plates 601. Then, the handle 703 can be sleeved on the outer surface of the mounting sleeve 2. Among them, the internal volume of the handle 703 is the same as the outer diameter of the mounting sleeve 2, and the cross-section of the mounting sleeve 2 is L-shaped. The purpose is to facilitate the protective cover 701 to be sleeved on its surface. After the protective cover 701 is placed, the four mounting plates 601 are respectively rotated outward, and they respectively rotate along the four limiting tubes 4, so that the opposite outer surfaces of the four mounting plates 601 are respectively stuck inside their corresponding limiting slots 702. Among them, the length of the limiting slot 702 matches the width of the mounting plate 601. In addition, through the setting of the anti-slip pad 704, the mounting plate 601 is squeezed and limited. Among them, the anti-slip pad 704 has high friction performance, good anti-slip performance, can well fit the surface of the object, plays a stable anti-slip role, is wear-resistant, and has a long service life. When the positions of the four mounting plates 601 are fixed, the four bearing blocks 617 are respectively pulled outward continuously, so that they respectively slide obliquely downward, thereby respectively driving one end of the movable rod 610 to move out of the inside of the mounting plate 601 until the movable rod 610 extends to the longest. At this time, every two corresponding jacks 611 are respectively opposite to the position of the inserting tube 609. In addition, the movement of the bearing block 617 also drives the extension plate 612 to move forward and slide out of the inside of the movable rod 610 until the extension plate 612 extends to the longest, so that each group of extrusion buckles 615 are respectively opposite to the positions of the four protective plates 616. Then, the four positive and negative motors 606 are started by the controller 9 to rotate, respectively driving the screw rods 607 connected to them to rotate, and further driving the corresponding moving rods 608 to move in the direction of the four bearing blocks 617, and further driving each group of inserting tubes 609 to move into the inside of the pressure-resistant plate 604 until each group of inserting tubes 609 are respectively inserted into the corresponding jacks 611, that is, the fixing of the movable rod 610 is realized. Then, the four protective plates 616 are respectively rotated so that their outer surfaces are separated from the inner wall of the movable rod 610, so that the multiple extrusion buckles 615 respectively move outward under the elastic action of the spring 614, and further realize the positioning of the four extension plates 612. Then, the four bearing blocks 617 can be used as Figure 7The friction surface shown is in contact with the ground, thereby realizing the deployment and support of the ranging device. Among them, the bearing block 617 is made of silica gel material, which has excellent flexibility and elasticity, is not easily deformed, and can still maintain good anti-slip performance under extreme temperature conditions. Then, the laser rangefinder body 3 can be started to measure the distance between two objects. Among them, the transmitter in the laser rangefinder body 3 emits a short pulse laser beam towards the target object. These laser pulses have high energy, extremely short duration, strong directivity and monochromaticity. After the laser beam irradiates the target object, part of the laser energy is absorbed by the target object, and the other part of the laser is reflected back. The receiver of the laser rangefinder body 3 receives the reflected laser and converts it into an electrical signal. This electrical signal contains the time information of the laser's round trip. The timer will measure the time interval from the emission to the reception of the laser beam. Given the speed of light, the distance between the laser rangefinder and the target object can be calculated according to the formula. When the measurement is completed, first turn off the laser rangefinder body 3, and then start the four forward and reverse motors 606 through the controller 9, so that they drive the lead screws 607 connected to them to rotate in the reverse direction respectively, thereby driving the plurality of insertion tubes 609 to move out of the inside of the jacks 611. Then, rotate the four protective plates 616 respectively so that they are respectively in contact with the inner walls of the four movable rods 610, thereby squeezing the plurality of springs 614, so that the outer surfaces of the plurality of extrusion buckles 615 are respectively tightly attached to the inner walls of the four movable rods 610. Then, the bearing blocks 617 can be pushed towards the mounting plate 601 respectively until the movable rods 610 and the extension plate 612 are completely reset. Then, the four mounting plates 601 can be rotated upward respectively until the inner walls of the four positioning grooves 602 are respectively rotated to a position tightly attached to the outer surfaces of the four positioning rods 5. At this time, the four mounting plates 601 are exactly perpendicular to the support table 1. Among them, the positioning rods 5 play a positioning role for the four mounting plates 601. Then, the staff can take out the protective cover 701 from the outer surface of the mounting sleeve 2 and sleeved between the outer surfaces of the four mounting plates 601, that is, the storage of the ranging device for engineering measurement is realized. The staff can carry the device away by holding the handle 703. It is small in size and convenient to carry, solving the problem that the ranging device for engineering measurement in the prior art is large in size and inconvenient to carry.

[0040] As Figures 1-5 and Figures 14-15As shown in the figure, a mounting sleeve 2 is fixedly connected to the bottom of the support platform 1 near the center by screws. A controller 9 is arranged near one side edge of the top of the support platform 1. Each of the four fixing components 8 includes a telescopic rod 801. The bottom ends of the four telescopic rods 801 are fixedly connected to the top of the support platform 1. The top ends of the four telescopic rods 801 are fixedly connected with lifting tubes 802. Stretch blocks 803 are fixedly sleeved on the outer surfaces of the four lifting tubes 802. Rotation grooves 804 are formed at the top ends of the four lifting tubes 802. Rotating blocks 805 are rotatably connected to the interiors of the four rotation grooves 804. One ends of the four rotating blocks 805 respectively penetrate out of the four rotation grooves 804. Positioning blocks 806 are fixedly installed at one ends of the four rotating blocks 805.

[0041] In the present invention, after the protective cover 701 is sleeved between the outer surfaces of the four mounting plates 601, in order to prevent the distance measuring device from unfolding during movement, after the protective cover 701 is sleeved, the four stretch blocks 803 are respectively moved towards the four card slots 705, so that the four telescopic rods 801 extend, driving the four lifting tubes 802 to move upward respectively, and further driving the four positioning blocks 806 to move upward. When the positioning blocks 806 move to the outer surface of the card slots 705, the four positioning blocks 806 are respectively rotated, so that the positioning blocks 806 coincide with the top view of the card slots 705. Then the stretch blocks 803 are continuously moved upward, driving the positioning blocks 806 to move to the upper part of the top of the protective cover 701 to the upper part of the limiting frame 706. Then the four positioning blocks 806 are respectively rotated, so that the four positioning blocks 806 are respectively rotated between the interiors of every two opposite limiting frames 706. The four positioning blocks 806 can move downward between the interiors of every two opposite limiting frames 706 under the action of their own gravity, thus realizing the positioning between the support platform 1 and the protective cover 701, making the stored distance measuring device more stable, and further facilitating the carrying of the distance measuring device.

[0042] Usage method and working principle of the present device: During the engineering survey, when it is necessary to deploy the distance measuring device for engineering survey, lift and rotate the four positioning blocks 806 upwards respectively, so that each positioning block 806 rotates to the outside of each two relatively arranged clamping grooves 705 and coincides with the top of the clamping groove 705. When the four positioning blocks 806 rotate to coincide with their corresponding clamping grooves 705 respectively, the protective cover 701 can be lifted upwards, so that the protective cover 701 is separated from the four mounting plates 601. Then, the handle 703 can be sleeved on the outer surface of the mounting sleeve 2. After the protective cover 701 is placed, rotate the four mounting plates 601 outwards respectively, so that they rotate along the four limiting tubes 4 respectively, so that the opposite outer surfaces of the four mounting plates 601 are respectively clamped inside the corresponding limiting grooves 702. Among them, the length of the limiting groove 702 matches the width of the mounting plate 601. In addition, through the setting of the anti-slip pad 704, the mounting plate 601 is squeezed and limited. When the positions of the four mounting plates 601 are fixed, pull the four bearing blocks 617 outwards respectively, so that they slide obliquely downwards respectively, so as to drive one end of the movable rod 610 out of the inside of the mounting plate 601 respectively until the movable rod 610 extends to the longest. At this time, every two corresponding jacks 611 are respectively opposite to the positions of the insertion tubes 609. In addition, the movement of the bearing block 617 also drives the extension plate 612 to move forward and slide out of the inside of the movable rod 610 until the extension plate 612 extends to the longest, so that each group of extrusion buckles 615 are respectively opposite to the positions of the four protective plates 616. Then, start the four forward and reverse motors 606 through the controller 9 to make them rotate, respectively drive the screw rods 607 connected to them to rotate, and then drive the corresponding moving rods 608 to move towards the four bearing blocks 617 respectively, and then drive each group of insertion tubes 609 to move into the inside of the pressure-resistant plate 604 respectively until each group of insertion tubes 609 are respectively inserted into the corresponding jacks 611, that is, the fixing of the movable rod 610 is realized. Then, rotate the four protective plates 616 respectively, so that the outer surfaces of them are separated from the inner walls of the movable rod 610, so that the multiple extrusion buckles 615 move outwards towards the outside of the movable rod 610 under the elastic action of the springs 614 respectively, and then the positioning of the four extension plates 612 is realized. Then, the four bearing blocks 617 can be such as Figure 7The friction surface shown is in contact with the ground, thereby realizing the deployment and support of the ranging device. Then, the laser rangefinder body 3 can be activated to measure the distance between two objects. After the measurement is completed, first, the laser rangefinder body 3 is turned off. Then, the four forward and reverse motors 606 are activated through the controller 9, causing them to drive the connected lead screws 607 to rotate in the reverse direction respectively, thereby driving a plurality of insertion tubes 609 to move out of the inside of the insertion holes 611. Then, the four protective plates 616 are rotated respectively to make them fit against the inner walls of the four movable rods 610, thereby squeezing a plurality of springs 614, so that the outer surfaces of the plurality of pressing buckles 615 are tightly attached to the inner walls of the four movable rods 610 respectively. Then, the bearing blocks 617 can be pushed towards the mounting plate 601 respectively until the movable rods 610 and the extension plates 612 are completely reset. Then, the four mounting plates 601 can be rotated upwards respectively until the inner walls of the four positioning grooves 602 are rotated to a position where they are tightly attached to the outer surfaces of the four positioning rods 5. At this time, the four mounting plates 601 are exactly perpendicular to the support table 1. Among them, the positioning rods 5 play a positioning role for the four mounting plates 601. Then, the staff can take out the protective cover 701 from the outer surface of the mounting sleeve 2 and sleeve it between the outer surfaces of the four mounting plates 601. In order to prevent the ranging device from unfolding during movement, after the protective cover 701 is sleeved, the four stretching blocks 803 are moved towards the four card slots 705 respectively, so that the four telescopic rods 801 extend, driving the four lifting tubes 802 to move upwards respectively, and then driving the four positioning blocks 806 to move upwards. When the positioning blocks 806 move to the outer surface of the card slots 705, the four positioning blocks 806 are rotated respectively, so that the positioning blocks 806 coincide with the top view of the card slots 705. Then, the stretching blocks 803 are continued to be moved upwards, driving the positioning blocks 806 to move to the upper part of the top of the protective cover 701 to the upper part of the limiting frame 706. Then, the four positioning blocks 806 are rotated respectively, so that the four positioning blocks 806 are rotated into the inside between every two opposite limiting frames 706 respectively. The four positioning blocks 806 can move downwards to the inside between every two opposite limiting frames 706 under the action of their own gravity, thereby realizing the positioning between the support table 1 and the protective cover 701. The staff can carry the device away by holding the handle 703.

[0043] The wiring diagrams of the laser rangefinder body 3, the forward and reverse motors 606, and the controller 9 in the present invention belong to the common knowledge in the art. Their working principles are already known technologies, and their models are selected according to actual use. Therefore, the control methods and wiring arrangements of the laser rangefinder body 3, the forward and reverse motors 606, and the controller 9 will not be explained in detail.

[0044] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A portable distance measuring device for engineering surveying, comprising a support platform (1), a laser distance measuring device body (3) for engineering surveying being arranged near the center of the top of the support platform (1), fixing components (8) being arranged near the four corners of the top of the support platform (1), and a portable component (7) being arranged between the outer surfaces of the fixing components (8); Features: Four telescopic components (6) are arranged on the outer surface of the support platform (1), and the four telescopic components (6) all include a mounting plate (601), and one side outer surface of the four mounting plates (601) is provided with a positioning groove (602), and the other side outer surface of the four mounting plates (601) is provided with a rectangular groove (603), and the inside of the four rectangular grooves (603) is fixedly embedded with a pressure-resistant plate (604), and the outer surfaces of the four pressure-resistant plates (604) are fixedly connected with mounting frames (605), and the outer surfaces of the four mounting frames (605) are fixedly installed by screws. There are forward and reverse motors (606), the output shafts of the four forward and reverse motors (606) are fixedly connected with screw rods (607), the outer surfaces of the four screw rods (607) are threadedly sleeved with moving rods (608), the outer surfaces of the four moving rods (608) are fixedly connected with insert pipes (609) near both ends, the insides of the four rectangular grooves (603) are slidably connected with movable rods (610), the outer surfaces of the four movable rods (610) are provided with two insertion holes (611), and the insides of the four movable rods (610) are slidably embedded with extension plates (612).

2. The portable distance measuring device for engineering surveying according to claim 1, characterized in that: The outer surfaces of the four extension plates (612) are each provided with a plurality of mounting grooves (613), the inner walls of the plurality of mounting grooves (613) are each provided with a spring (614), one end of each of the plurality of springs (614) is provided with an extrusion buckle (615), the relative inner walls of the four movable rods (610) are each rotatably connected with a protective plate (616) via a hinge, and one end of each of the four movable rods (610) is fixedly provided with a bearing block (617).

3. The portable distance measuring device for engineering surveying according to claim 2, characterized in that: Four limiting tubes (4) are fixedly connected between the relative inner walls of the support platform (1), and the outer surfaces of the four limiting tubes (4) are rotatably connected to the inner walls of the four mounting plates (601) respectively. Positioning rods (5) are fixed to the top of the support platform (1) near the four edges, and one end of the four screw rods (607) is movably penetrated to the outside of the four mounting frames (605).

4. The portable distance measuring device for engineering surveying according to claim 3 is characterized in that: The eight insert tubes (609) are grouped into two adjacent ones, and one end of each group of insert tubes (609) is movably inserted into the interior of the four mounting plates (601). The eight insertion holes (611) are grouped into two adjacent ones, and one end of each group of insert tubes (609) is movably inserted into the interior of each group of insertion holes (611). The four movable rods (610) are movably inserted into the exterior of the four pressure-resistant plates (604).

5. The portable distance measuring device for engineering surveying according to claim 4, characterized in that: One ends of the plurality of springs (614) are respectively fixedly connected to the inner walls of the plurality of mounting grooves (613), and the other ends of the plurality of springs (614) are respectively fixedly connected to the outer surfaces of the plurality of extrusion buckles (615), and the outer surfaces of the four extension plates (612) are respectively movable and penetrate to the outside of the four movable rods (610).

6. The portable distance measuring device for engineering surveying according to claim 5, characterized in that: The bottom of the support platform (1) is fixedly connected to a mounting sleeve (2) by screws near the center, and a controller (9) is arranged near a side edge of the top of the support platform (1). The four fixing components (8) each include a telescopic rod (801), and the bottom ends of the four telescopic rods (801) are fixedly connected to the top of the support platform (1).

7. The portable distance measuring device for engineering surveying according to claim 6, characterized in that: The top ends of the four telescopic rods (801) are fixedly connected to a lifting tube (802), the outer surfaces of the four lifting tubes (802) are fixedly sleeved with a stretching block (803), and the top ends of the four lifting tubes (802) are provided with a rotating groove (804).

8. The portable distance measuring device for engineering surveying according to claim 7, characterized in that: The inside of the four rotating grooves (804) are all rotatably connected with a rotating block (805), one end of the four rotating blocks (805) are respectively movable and penetrate the outside of the four rotating grooves (804), and one end of the four rotating blocks (805) are all fixedly installed with a positioning block (806).

9. The portable distance measuring device for engineering surveying according to claim 8, characterized in that: The portable component (7) comprises a protective cover (701), the outer surface of the protective cover (701) is provided with four limiting grooves (702), the opposite inner walls of the four limiting grooves (702) are provided with anti-slip pads (704), and a handle (703) is fixedly installed near the center of the top of the protective cover (701).

10. The portable distance measuring device for engineering surveying according to claim 9, characterized in that: The top of the protective cover (701) is provided with a card slot (705) near the four edges, and two limit frames (706) are fixedly installed on the top of each of the card slots (705), and the bottoms of the plurality of limit frames (706) are fixedly connected to the top of the protective cover (701).

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