Double-roller folding type engineering range finder

Abstract

The utility model provides a double-roller folding type engineering distance measuring instrument, which relates to the technical field of distance measuring equipment and comprises a base, a telescopic push rod is fixedly connected onto the base, a horizontally arranged driving shaft is rotatably mounted at the bottom of the base, and two ends of the driving shaft are respectively in transmission connection with a rotating shaft through universal couplings. A turnover shaft is fixedly mounted on each rotating shaft, a roller is hinged to each turnover shaft through a support, the two turnover shafts are parallel to the driving shaft, included angles are formed between the driving shaft and the corresponding rotating shafts and between the two turnover shafts and the corresponding rotating shafts, a gear is fixedly mounted on the driving shaft, and a sliding plate is slidably mounted on the base. A rack is fixedly installed on the sliding plate, a locking assembly used for locking the rack is arranged on the base, an electronic counter is fixedly installed on one support, a folding type double-roller structure is adopted, the two rollers are folded from the two sides to the inner side, and stability during measurement and portability after storage are achieved.

Description

Technical Field

[0001] This utility model relates to the field of distance measuring equipment technology, and in particular to a double-roller folding engineering distance measuring instrument. Background Technology

[0002] A distance measuring instrument is a widely used distance measuring device in fields such as construction, engineering, and surveying for measurement and evaluation. It generally consists of a handheld stand, a counter, and rollers. When measuring distances, the surveyor pushes the rollers forward using a push rod, and the counter measures the distance by counting the rotation of the rollers. Currently, the most commonly used is the relatively portable single-roller distance measuring instrument. However, when measuring complex terrain, the support and stability of the single-roller distance measuring instrument are poor and cannot meet the requirements. To overcome the above defects, some dual-roller distance measuring instruments have also appeared on the market. The dual-roller distance measuring instrument has a roller on each side. The two-roller structure increases the space occupied and reduces portability.

[0003] Therefore, a dual-roller folding engineering distance measuring instrument is needed to solve the above problems. Utility Model Content

[0004] This utility model proposes a double-roller folding engineering rangefinder, which adopts a folding double-roller structure, so that the two rollers fold from both sides to the inside, thereby achieving stability during measurement and portability after storage.

[0005] The technical solution of this utility model is implemented as follows:

[0006] A dual-roller folding engineering distance meter includes a base, on which a telescopic push rod is fixedly connected. A horizontally arranged drive shaft is rotatably mounted on the bottom of the base. Two mounting seats are fixedly mounted on the bottom of the base, and each mounting seat has a rotating shaft rotatably mounted on it. Each rotating shaft is connected to the drive shaft via a universal coupling. A tilting shaft is fixedly mounted on each rotating shaft. A roller is hinged to the free end of each tilting shaft via a bracket. Both tilting shafts are parallel to the drive shaft. An angle is formed between the drive shaft and the two tilting shafts and their corresponding rotating shafts. A gear is fixedly mounted on the drive shaft. A sliding plate is slidably mounted on the base along the perpendicular direction of the drive shaft. A rack that meshes with the gear is fixedly mounted on the sliding plate. A locking assembly for locking the rack is provided on the base. An electronic counter is fixedly mounted on one of the brackets.

[0007] As a preferred technical solution, the two rotating axes are symmetrically arranged, and the included angle between the two axes is 135 degrees.

[0008] As a preferred technical solution, the locking assembly includes a magnetic pin, with a magnetic block fixedly installed at the lower end of the magnetic pin. A first pin hole and a second pin hole are vertically arranged on the base, and a limiting groove is provided on the top of the sliding plate. When the two rollers are in the unfolded state, the lower end of the magnetic pin passes through the first pin hole and extends into the limiting groove. When the two rollers are in the folded state, the lower end of the magnetic pin passes through the second pin hole and extends into the limiting groove.

[0009] As a preferred technical solution, each universal coupling includes two universal joints hinged together, and the two universal joints are respectively fixedly installed at the end of the drive shaft and the end of the corresponding rotating shaft.

[0010] As a preferred technical solution, a pair of horizontally arranged guide grooves are fixedly installed on the bottom of the base, and a protrusion is fixedly installed on each side of the sliding plate, with each protrusion disposed in the corresponding guide groove.

[0011] As a preferred technical solution, the base is provided with a through groove, and a push block is fixedly installed on the top of the sliding plate. The free end of the push block passes through the through groove and extends to the upper side of the base.

[0012] By adopting the above technical solution, the beneficial effects of this utility model are as follows:

[0013] The dual-roller folding engineering rangefinder consists of a base and two rollers. During use, the two rollers are in the unfolded state, located on both sides of the base. The surveyor holds the telescopic push rod and pushes the rollers at the location to be measured. The two rollers contact the ground, providing support for the rangefinder and ensuring stability during measurement. After measurement, the sliding plate is pushed, the rack and gear mesh, and the universal coupling drives the two shafts to rotate, causing the two rollers to fold inward from both sides. After folding, the rack is locked by the locking assembly. Folding reduces the space occupied by the two rollers, making it portable after storage.

[0014] The 135-degree angle between the two rollers prevents them from colliding when they flip inwards simultaneously during the folding process, ensuring that the two rollers and the two flip shafts are arranged side by side on the inside of the base when folded.

[0015] Since the locking assembly includes a magnetic pin, a first pin hole, a second pin hole, and a limiting groove, when the two rollers are in the unfolded state, the limiting groove is located below the first pin hole, and the lower end of the magnetic pin passes through the first pin hole and extends into the limiting groove. When the two rollers are in the folded state, the limiting groove is located below the second pin hole, and the lower end of the magnetic pin passes through the second pin hole and extends into the limiting groove. In this utility model, by the magnetic pin cooperating with the first pin hole and the second pin hole respectively, and under the action of the magnetic force between the magnetic block and the sliding plate, the rack is locked after the rollers are unfolded and after the rollers are folded, thereby ensuring that the two rollers are in a locked state after unfolding or folding. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 for Figure 1 A bottom view;

[0019] Figure 3 A reference diagram showing the state of the two rollers after folding;

[0020] Figure 4 This is a schematic diagram of the locking assembly.

[0021] Figure 5 This is a connection block diagram of the microcontroller.

[0022] The components are as follows: 1. Base; 2. Telescopic push rod; 3. Drive shaft; 4. Universal coupling; 5. Rotating shaft; 6. Tilting shaft; 7. Bracket; 8. Roller; 9. Gear; 10. Sliding plate; 11. Rack; 12. Electronic counter; 13. Microcontroller; 14. Digital display; 15. Magnetic pin; 16. Magnetic block; 17. First pin hole; 18. Second pin hole; 19. Limiting groove; 20. Universal joint; 21. Guide groove; 22. Protrusion; 23. Through groove; 24. Push block; 25. Mounting base. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figures 1-5 As shown, the dual-roller folding engineering rangefinder includes a base 1, a telescopic push rod 2 fixedly connected to the base 1, a horizontally arranged drive shaft 3 rotatably mounted on the bottom of the base 1, two mounting seats 25 fixedly mounted on the bottom of the base 1, and a rotating shaft 5 rotatably mounted on each of the two mounting seats 25. Each rotating shaft 5 is connected to the drive shaft 3 via a universal coupling 4. A flip shaft 6 is fixedly mounted on each rotating shaft 5. A roller 8 is hinged to the free end of each flip shaft 6 via a bracket 7. Both flip shafts 6 are parallel to the drive shaft 3. An angle is set between the drive shaft 3 and the two flip shafts 6 and the corresponding rotating shaft 5. A gear 9 is fixedly mounted on the drive shaft 3. A sliding plate 10 is slidably mounted on the base 1 along the vertical direction of the drive shaft 3. A rack 11 that meshes with the gear 9 is fixedly mounted on the sliding plate 10. A locking component for locking the rack 11 is provided on the base 1. An electronic counter 12 is fixedly mounted on one of the brackets 7.

[0025] In this invention, the electronic counter 12 uses a TRD-S50B photoelectric encoder, and the input and output shafts of the TRD-S50B photoelectric encoder are connected to the adjacent rollers 8.

[0026] It also includes a microcontroller 13 and a wireless module. A digital display 14 is fixedly installed on the top of the telescopic push rod 2. During the measurement process, the TRD-S50B photoelectric encoder converts the mechanical rotation of the roller 8 into a pulse signal. The pulse signal is processed by the microcontroller 13 and transmitted to the digital display 14 through the wireless module, thereby obtaining the number of rotations of the roller 8. In this utility model, the microcontroller 13 adopts an STM32, and the wireless module adopts a Bluetooth module HC-05.

[0027] The two rotating shafts are symmetrically arranged, with both included angles of 135 degrees.

[0028] The locking assembly includes a magnetic pin 15, with a magnetic block 16 fixedly mounted on the lower end of the magnetic pin 15. A first pin hole 17 and a second pin hole 18 are vertically arranged on the base 1. A limiting groove 19 is provided on the top of the sliding plate 10. When the two rollers 8 are in the unfolded state, the lower end of the magnetic pin 15 passes through the first pin hole 17 and extends into the limiting groove 19. When the two rollers 8 are in the folded state, the lower end of the magnetic pin 15 passes through the second pin hole 18 and extends into the limiting groove 19.

[0029] Each universal coupling 4 includes two universal joints 20 hinged together, and the two universal joints 20 are fixedly installed at the end of the drive shaft 3 and the end of the corresponding rotating shaft 5, respectively.

[0030] A pair of horizontally arranged guide grooves 21 are fixedly installed on the bottom of the base 1, and a protrusion 22 is fixedly installed on each side of the sliding plate 10. Each protrusion 22 is set in the corresponding guide groove 21.

[0031] A through groove 23 is provided on the base 1, and a push block 24 is fixedly installed on the top of the sliding plate 10. The free end of the push block 24 passes through the through groove 23 and extends to the upper side of the base 1.

[0032] In summary, this utility model adopts a foldable double roller structure, which allows the two rollers to fold inward from both sides, achieving stability during measurement and portability after storage.

[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A double-roller folding engineering range finder, comprising a base, a telescopic push rod being fixedly connected to the base, characterized in that, The bottom of the base is rotationally installed with a horizontally arranged driving shaft, the bottom of the base is fixedly installed with two mounting seats, two rotationally installed rotating shafts are arranged on the two mounting seats, each rotating shaft is in driving connection with the driving shaft through a universal joint, each rotating shaft is fixedly installed with a turnover shaft, the free end of each turnover shaft is hingedly connected with a roller through a support, the two turnover shafts are arranged in parallel with the driving shaft, an included angle is arranged between the driving shaft and the two turnover shafts, the driving shaft is fixedly installed with a gear, the base is slidingly installed with a sliding plate along the vertical direction of the driving shaft, the sliding plate is fixedly installed with a rack in engagement with the gear, the base is provided with a locking assembly for locking the rack, and one of the supports is fixedly installed with an electronic counter.

2. The dual roller folding engineering range finder of claim 1, wherein, The two rotating shafts are symmetrically arranged, and the two included angles are 135 degrees.

3. The dual roller folding engineering range finder of claim 1, wherein, The locking assembly comprises a magnetic pin, the lower end of the magnetic pin is fixedly installed with a magnetic block, the base is vertically provided with a first pin hole and a second pin hole, the top of the sliding plate is provided with a limiting groove, when the two rollers are in the unfolded state, the lower end of the magnetic pin passes through the first pin hole and extends into the limiting groove, when the two rollers are in the folded state, the lower end of the magnetic pin passes through the second pin hole and extends into the limiting groove.

4. The dual roller folding engineering range finder of claim 1, wherein, Each universal joint comprises two hingedly connected universal joints, and the two universal joints are fixedly installed on the end of the driving shaft and the end of the corresponding rotating shaft, respectively.

5. The dual roller folding engineering range finder of claim 1, wherein, The bottom of the base is fixedly installed with a pair of horizontally arranged guide grooves, and the two sides of the sliding plate are respectively fixedly installed with a protrusion, each protrusion is arranged in the corresponding guide groove.

6. The dual roller folding engineering range finder of claim 1, wherein, The base is provided with a through groove, the top of the sliding plate is fixedly installed with a pushing block, the free end of the pushing block passes through the through groove and extends to the upper side of the base.

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