Distance measuring equipment for building construction project cost measurement

Abstract

The utility model provides distance measuring equipment for building construction project cost measurement, which relates to the field of building construction and comprises a tape box and a tape, the tape is wound at one end of the tape box and extends to the outer side of the tape box, the outer side of the tape box is fixedly connected with a fixing frame, the front end of the fixing frame is fixedly provided with a hinge joint, and the hinge joint is fixedly connected with the tape box. Hinge rods are elastically hinged to the outer surfaces of the hinge heads; according to the distance measuring equipment for building construction project cost measurement, a ruler belt is pulled out, the ruler belt rubs a friction wheel in the outward pulling-out process, so that a rotating shaft can be driven to rotate, the rotating shaft is located in a bearing cavity and is provided with a sensor, and the number of turns of rotation of the rotating shaft is recorded; the length of the drawn-out ruler belt is determined by multiplying the length of the drawn-out ruler belt with the perimeter of the friction wheel, then a signal can be displayed on the display screen, at the moment, a numerical value can be conveniently read, meanwhile, whether errors are within the range or not is determined by comparing with scale reading numerical values of the ruler belt, and errors of measured data are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to a distance measuring device for measuring the project cost of building construction. Background Technique

[0002] There are many types of rangefinders. Among them, the laser rangefinder can measure the distance in the horizontal direction. However, when the part to be measured is the circumference of a column or a curved part, the laser rangefinder cannot be effectively used. The roller rangefinder is portable and can bend along with the curved part. However, when the roller slides and displaces, the distance of this part cannot be measured. The traditional tape measure deforms when subjected to tension, resulting in inaccurate readings.

[0003] An existing patent, a tape measure (CN201034519Y), discloses that it includes a tape case and a tape. The tape is placed in the tape case in a coiled manner. There is also a roller and a roller counting device, as well as a counting display device in the tape case. The tape is closely attached to the roller. When the tape moves, the surface of the roller moves at the same linear speed. The roller counting device records the movement of the roller and presents it to the user through the counting display device.

[0004] This technical solution has the advantages of accurate measurement and portability, and avoids the distortion of the tape, improving the service life of the tape measure. However, the roller and the tape only rely on frictional contact and are prone to slipping, resulting in inaccurate measurement values. Therefore, a measuring device that can accurately determine the value is needed. Content of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the utility model provides a distance measuring device for measuring the project cost of building construction, which solves the problem of inaccurate measurement data due to slipping during the measurement of the device.

[0006] Technical Solution

[0007] To achieve the above objectives, the present utility model is realized through the following technical solutions: A ranging device for measuring the project cost of building construction, including a tape measure box and a tape. The tape is wound and retracted at one end of the tape measure box and extends to the outside of the tape measure box. A fixed frame is fixedly connected to the outside of the tape measure box. A hinge joint is fixedly installed at the front end of the fixed frame. An articulated rod is elastically hinged to the outer surface of the hinge joint. One end of the articulated rod away from the hinge joint is rotatably connected to a rotating shaft. A friction wheel is fixedly installed on the outer surface of the rotating shaft. A bearing cavity is fixedly installed on one side of the fixed frame. A notch sleeving the outer surface of the rotating shaft is formed on the surface of the bearing cavity. One end of the rotating shaft extends into the interior of the bearing cavity. A support platform is fixedly installed at the bottom end of the bearing cavity. A support wheel is rotatably connected below the friction wheel. The tape is located between the support wheel and the friction wheel. A support plate is fixedly sleeved on the outer surface of the rotating shaft inside the bearing cavity. A sensor mobile end is fixedly installed at one end of the support plate. A sensor fixed end is arranged inside the bearing cavity.

[0008] A shielding half-ring is sleeved on the outer surface of the rotating shaft inside the bearing cavity. The shielding half-ring is slidably connected to the bearing cavity. A bearing half-ring parallel to the shielding half-ring is slidably connected to the inner wall of the bearing cavity. The sensor fixed end is fixedly installed on the outer surface of the bearing half-ring. The rotating shaft is rotatably connected to the bearing half-ring. The center lines of the bearing half-ring, the shielding half-ring, and the notch coincide with the axis of the hinge joint.

[0009] Ring grooves are arranged in the middle of both the support wheel and the friction wheel. The graduated part of the tape is located inside the ring grooves.

[0010] The fixed frame is inserted into the tape measure box. Bolts are threadedly connected to both sides of the fixed frame.

[0011] A snap ring is fixedly installed on the end face of the tape. A half-ring sleeve is fixedly installed on one side of the bearing cavity. A half-ring block is slidably connected inside the half-ring sleeve.

[0012] A display screen is fixedly installed above the fixed frame. The signals generated by the sensor mobile end and the sensor fixed end are processed and limited to be displayed on the display screen.

[0013] The beneficial effects of the present utility model are as follows:

[0014] 1. For the ranging device for measuring the project cost of building construction, when the tape is pulled outwards, the tape frictions the friction wheel during the process of being pulled outwards, thereby being able to drive the rotating shaft to rotate. A sensor is arranged inside the bearing cavity where the rotating shaft is located. By recording the number of rotations of the rotating shaft and multiplying it by the circumference of the friction wheel, the length of the tape pulled out is determined. Furthermore, the signal can be displayed on the display screen. At this time, it is convenient to read the value. At the same time, by comparing with the value read from the scale of the tape, it is determined whether the error is within the range, avoiding incorrect measurement data.

[0015] 2. The ranging device for measuring the construction project cost has a shielding semi-ring whose function is to cover the notch to prevent dust from entering. A bearing semi-ring parallel to the shielding semi-ring is slidably connected to the inner wall of the bearing cavity. The fixed end of the sensor is fixedly installed on the outer surface of the bearing semi-ring. The rotating shaft is rotatably connected to the bearing semi-ring. A bearing is provided between the bearing semi-ring and the rotating shaft. The center lines of the bearing semi-ring, the shielding semi-ring, and the notch coincide with the axis of the hinge joint. With such a setting, when the rotating shaft swings, the bearing semi-ring drives the fixed end of the sensor to move, so that the fixed end of the sensor and the mobile end of the sensor are always within the optimal working range, improving the working accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the present invention;

[0017] Figure 2 is a schematic connection diagram of the fixing frame of the present invention;

[0018] Figure 3 is a schematic connection diagram of the rotating shaft of the present invention;

[0019] Figure 4 is a schematic half-sectional view of the bearing cavity of the present invention.

[0020] Among them, 1. Tape measure box; 2. Tape; 3. Fixing frame; 4. Hinge joint; 5. Hinge rod; 6. Rotating shaft; 7. Friction wheel; 8. Bearing cavity; 9. Support platform; 10. Support wheel; 11. Support plate; 12. Mobile end of the sensor; 13. Fixed end of the sensor; 14. Notch; 15. Bearing semi-ring; 16. Ring groove; 17. Bolt; 18. Snap ring; 19. Semi-ring sleeve; 20. Semi-ring block; 21. Display screen; 22. Shielding semi-ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] 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.

[0022] Refer to Figures 1 - 4, a distance measuring device for measuring the project cost of building construction, including a tape measure box 1 and a tape 2. The tape 2 is wound at one end of the tape measure box 1 and extends to the outside of the tape measure box 1. A fixed frame 3 is fixedly connected to the outside of the tape measure box 1. A hinge joint 4 is fixedly installed at the front end of the fixed frame 3. An articulated rod 5 is elastically articulated on the outer surface of the hinge joint 4. A torsion spring is arranged at the connection end. One end of the articulated rod 5 away from the hinge joint 4 is rotatably connected to a rotating shaft 6. A friction wheel 7 is fixedly installed on the outer surface of the rotating shaft 6. A bearing cavity 8 is fixedly installed on one side of the fixed frame 3. A notch 14 sleeving on the outer surface of the rotating shaft 6 is formed on the surface of the bearing cavity 8. One end of the rotating shaft 6 extends into the interior of the bearing cavity 8. A support platform 9 is fixedly installed at the bottom end of the bearing cavity 8. A support wheel 10 is rotatably connected below the friction wheel 7. The tape 2 is located between the support wheel 10 and the friction wheel 7. A support plate 11 is fixedly sleeved on the outer surface of the rotating shaft 6 inside the bearing cavity 8. A sensor mobile end 12 is fixedly installed at one end of the support plate 11. A sensor fixed end 13 is arranged inside the bearing cavity 8. The sensor is a grating sensor.

[0023] A shielding half-ring 22 is sleeved on the outer surface of the rotating shaft 6 inside the bearing cavity 8. The shielding half-ring 22 is slidably connected to the bearing cavity 8. A bearing is arranged between the shielding half-ring 22 and the rotating shaft 6. The function of the shielding half-ring 22 is to cover the notch 14 to prevent dust from entering. A bearing half-ring 15 parallel to the shielding half-ring 22 is slidably connected to the inner wall of the bearing cavity 8. The sensor fixed end 13 is fixedly installed on the outer surface of the bearing half-ring 15. The rotating shaft 6 is rotatably connected to the bearing half-ring 15. A bearing is arranged between the bearing half-ring 15 and the rotating shaft 6. The center lines of the bearing half-ring 15, the shielding half-ring 22 and the notch 14 coincide with the axis of the hinge joint 4. Through such a setting, when the rotating shaft 6 swings, the bearing half-ring 15 can drive the sensor fixed end 13 to move, so that the sensor fixed end 13 and the sensor mobile end 12 can always be within the optimal working range, improving the working accuracy.

[0024] Ring grooves 16 are arranged in the middle of both the support wheel 10 and the friction wheel 7. The graduated part of the tape 2 is located inside the ring grooves 16. Through such a setting, the wear of the graduations of the tape 2 can be reduced.

[0025] The fixed frame 3 is inserted into the tape measure box 1. Bolts 17 are threadedly connected to both sides of the fixed frame 3. The tape measure is squeezed against the inner side of the fixed frame 3 by the bolts 17, so as to realize the fixed installation of the tape measure on the inner side of the fixed frame 3. Through such a setting, it is convenient to remove and install the device and connect it with other tape measures.

[0026] A snap ring 18 is fixedly installed on the end face of the tape 2, and a semi-circular sleeve 19 is fixedly installed on one side of the bearing cavity 8. A semi-circular block 20 is slidably connected inside the semi-circular sleeve 19. Through such a setting, the position of the tape 2 can be fixed to prevent the tape 2 from falling out of the tape measure box 1.

[0027] Above the fixing frame 3, a display screen 21 is fixedly installed. The signals generated by the sensor mobile end 12 and the sensor fixed end 13 are processed and limited to be displayed on the display screen 21. Through such a setting, the measured value can be displayed on the display screen 21. By comparing the displayed value with the scale on the tape 2, it can be determined whether it is within the error range, so as to determine the actual length.

[0028] When in use, the tape 2 is pulled outwards. During the process of pulling out the tape 2 outwards, it rubs against the friction wheel 7. Under the action of the elastic hinge rod 5 of the friction wheel 7, it clings to the tape 2, so as to drive the rotary shaft 6 to rotate. A sensor is arranged inside the bearing cavity 8 for the rotary shaft 6. By recording the number of turns of the rotary shaft 6 rotating and multiplying it by the circumference of the friction wheel 7, the length of the tape 2 pulled out can be determined. Furthermore, the signal can be displayed on the display screen 21. At this time, it is convenient to read the value. At the same time, by comparing it with the value read from the scale of the tape 2, it can be determined whether the error is within the range to avoid incorrect measurement data.

[0029] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0030] The above is only the preferred specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent substitutions or changes, and should be covered within the protection scope of the present utility model.

Claims

1. A distance measuring device for measuring the cost of a construction project, comprising a tape measure box (1) and a tape measure (2), wherein the tape measure (2) is wound around one end of the tape measure box (1) and extends to the outside of the tape measure box (1), characterized in that: The outer side of the measuring tape box (1) is fixedly connected to a fixing frame (3), a hinged head (4) is fixedly mounted on the front end of the fixing frame (3), a hinged rod (5) is elastically hingedly mounted on the outer surface of the hinged head (4), an end of the hinged rod (5) away from the hinged head (4) is rotatably connected to a rotating shaft (6), and a friction wheel (7) is fixedly mounted on the outer surface of the rotating shaft (6); A bearing cavity (8) is fixedly mounted on one side of the fixing frame (3); a notch (14) is provided on the surface of the bearing cavity (8) and is sleeved on the outer surface of the rotating shaft (6); one end of the rotating shaft (6) extends into the interior of the bearing cavity (8); a support platform (9) is fixedly mounted on the bottom end of the bearing cavity (8); the support platform (9) is located below the friction wheel (7) and is rotatably connected to a support wheel (10); and the ruler (2) is located between the support wheel (10) and the friction wheel (7); The outer surface of the rotating shaft (6) located inside the bearing cavity (8) is fixedly sleeved with a support plate (11), one end of the support plate (11) is fixedly mounted with a sensor moving end (12), and a sensor fixed end (13) is arranged inside the bearing cavity (8).

2. The distance measuring device for measuring the construction engineering cost according to claim 1 is characterized in that: The outer surface of the rotating shaft (6) located inside the bearing cavity (8) is sleeved with a shielding half ring (22), a bearing is arranged between the shielding half ring (22) and the rotating shaft (6), the shielding half ring (22) and the bearing cavity (8) are slidably connected, the inner wall of the bearing cavity (8) is slidably connected with a bearing half ring (15) parallel to the shielding half ring (22), the sensor fixed end (13) is fixedly mounted on the outer surface of the bearing half ring (15), the rotating shaft (6) is rotatably connected to the bearing half ring (15), a bearing is arranged between the bearing half ring (15) and the rotating shaft (6), and the center lines of the bearing half ring (15), the shielding half ring (22) and the notch (14) coincide with the axis of the hinge joint (4).

3. The distance measuring device for measuring the construction engineering cost according to claim 2 is characterized in that: The middle parts of the support wheel (10) and the friction wheel (7) are both provided with an annular groove (16), and the scale part of the ruler tape (2) is located inside the annular groove (16).

4. A distance measuring device for measuring construction engineering cost according to any one of claims 1 to 3, characterized in that: The fixing frame (3) is plugged into the measuring tape box (1), and bolts (17) are threadedly connected on both sides of the fixing frame (3).

5. The distance measuring device for measuring the construction engineering cost according to claim 4 is characterized in that: A snap ring (18) is fixedly mounted on the end surface of the ruler tape (2), a semi-ring sleeve (19) is fixedly mounted on one side of the bearing cavity (8), and a semi-ring block (20) is slidably connected inside the semi-ring sleeve (19).

6. The distance measuring device for measuring the construction engineering cost according to claim 5, characterized in that: A display screen (21) is fixedly mounted above the fixed frame (3), and signals generated by the sensor mobile end (12) and the sensor fixed end (13) are processed and limited to the display screen (21).

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