Measuring tool for measuring and calculating building cost

Abstract

The measuring tool comprises a push rod, a supporting frame is fixed to the lower end of the push rod, the supporting frame is rotationally connected with a ratchet wheel, the ratchet wheel is in one-way transmission with two rotationally connected transmission shafts, the transmission shafts are coaxially provided with distance measuring wheels, and the distance measuring wheels can move in the radial direction of the transmission shafts. The transmission shaft is rotationally provided with a transmission assembly inserted into the distance measuring wheel, the other end of the transmission assembly is inserted into the transmission shaft, the distance measuring wheel is rotationally connected with a rotating rod rotationally connected to the supporting frame and the connecting frame, the distance measuring wheel moves upwards to be limited when being coaxial with the transmission shaft, and the distance measuring wheel moves upwards to be limited when not being coaxial with the transmission shaft. The transmission assemblies are not inserted into the transmission shafts, the ends, away from each other, of the two transmission shafts are rotationally connected with a connecting frame, the connecting frame is fixed to the push rod, and the supporting frame is connected with a detector used for detecting the number of rotation turns of the ratchet wheel. The method has the advantage of accurate measurement.

Description

Technical Field

[0001] The invention belongs to the technical field of building cost measuring tools, and in particular relates to a measuring tool for building cost estimation. Background Art

[0002] The construction cost generally refers to the cost of carrying out a certain project construction, that is, the total cost from planning to completion acceptance. It is composed of construction and installation engineering costs, equipment and tools purchase costs, other construction costs and contingency fees and taxes. People use measuring wheels to measure the distance of the construction site before construction. The measuring wheel can then be used to calculate the cost of the project and the construction materials based on the measurement results.

[0003] In the prior art, when personnel use a measuring wheel to measure on-site distances, due to uneven ground or other reasons, the measuring wheel may bounce while moving along the ground, which may cause the measuring wheel to spin idly. The idling situation will also be included in the corresponding distance, making it impossible to ensure the accuracy of the measurement. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a measuring tool for building cost calculation with accurate measurement.

[0005] The technical solutions of the present invention are as follows:

[0006] A measuring tool for calculating construction costs, comprising a push rod, a support frame fixed to the lower end of the push rod, a ratchet wheel rotatably connected to the support frame, the ratchet wheel having two rotatably connected transmission shafts for unidirectional transmission, a distance measuring wheel coaxially provided on the transmission shaft, and the distance measuring wheel capable of radial displacement along the transmission shaft, a transmission assembly rotatably provided on the transmission shaft for plugging into the distance measuring wheel, and the other end of the transmission assembly plugged into the transmission shaft;

[0007] The distance measuring wheel is rotatably connected to a rotating rod rotatably connected to the support frame and the connecting frame. When the distance measuring wheel is coaxial with the transmission shaft, it moves upward to a limit position. When the distance measuring wheel is not coaxial with the transmission shaft, the transmission assembly is not plugged into the transmission shaft. One end of the two transmission shafts that are away from each other is rotatably connected to the connecting frame, and the connecting frame is fixed to the push rod;

[0008] The support frame is connected with a detector for detecting the number of rotations of the ratchet wheel.

[0009] Furthermore, the support frame is fixed with an annular connecting shell, and the connecting shell is fixed with a limiting rod which abuts against the outer surface of the inner ring of the distance measuring wheel through a ball bearing, and the limiting rod is located above the distance measuring wheel.

[0010] Furthermore, the connecting shell is rotationally connected to the ratchet, the ratchet is rotationally connected to the transmission shaft, and the transmission shaft is provided with a pawl that cooperates with the ratchet.

[0011] Furthermore, the transmission shafts are each provided with an annular groove for placing the distance measuring wheel, and the annular groove does not contact the inner side surface of the inner ring of the distance measuring wheel, and the side surface of the annular groove is provided with a transmission hole for plugging in the transmission assembly.

[0012] Furthermore, a rotating groove is formed on the circular side of the ring groove, and the transmission assembly includes a follower ring rotatably connected to the rotating groove, a floating hole formed on the follower ring, an adjustment disk placed in the floating hole, and a plug-in rod connected to the adjustment disk, and the follower ring contacts the distance measuring wheel;

[0013] The plug-in rod is elastically connected to the distance measuring wheel and can be plugged into the transmission hole. The adjustment disk moves along the floating hole wall as the distance measuring wheel moves radially and drives the plug-in rod to disengage from the transmission hole.

[0014] Furthermore, an adjustment hole with a diameter larger than that of the plug-in rod is opened on the side of the follower ring facing the distance measuring wheel, and the adjustment hole is concentrically connected to the floating hole.

[0015] Furthermore, the side of the floating hole facing the measuring wheel is funnel-shaped, and the side with a smaller diameter is connected to the adjustment hole. The adjustment disk is conical and the end with a smaller diameter is connected to the plug rod. The diameter of the adjustment disk is larger than the adjustment hole.

[0016] Furthermore, a circular hole is provided on the follower ring, and a resisting shaft is elastically inserted into the circular hole.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention realizes dual distance measurement through two transmission shafts and two distance measuring wheels. Under the action of the unidirectional transmission structure, the part that is not detected when a test wheel is floating during the test is supplemented, and the distance measurement is realized under the action of the ratchet and the detector to ensure the accuracy of the measurement.

[0019] 2. The present invention arranges the transmission assembly so that when the distance measuring wheel is not in contact with the ground, it does not transmit to the transmission shaft, thereby avoiding the situation where the measured distance increases and ensuring the accuracy of the measurement.

[0020] In summary, the present invention has the advantage of accurate measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 For the present invention Figure 1 A schematic diagram of the structure of the connecting shell and the measuring wheel part;

[0023] Figure 3 For the present invention Figure 2 A schematic diagram of the enlarged structure of part A;

[0024] Figure 4 For the present invention Figure 3 Schematic diagram of the side structure of the follower ring;

[0025] Figure 5 For the present invention Figure 2 Schematic diagram of the enlarged structure of part B.

[0026] In the figure, 1. push rod; 2. connecting frame; 3. transmission assembly; 31. plug-in rod; 32. adjusting disk; 33. floating hole; 34. follower ring; 341. adjusting hole; 342. interference shaft; 4. support frame; 5. connecting sleeve; 6. distance measuring wheel; 7. connecting shell; 71. limit rod; 8. connecting block; 9. ratchet; 10. transmission shaft; 101. transmission hole; 11. detector; 12. articulated rod; 13. rotating rod. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] like Figures 1 to 5 As shown, a measuring tool for construction cost calculation includes a push rod 1, a support frame 4 is fixed to the lower end of the push rod 1, the support frame 4 is rotatably connected to a ratchet 9, the ratchet 9 has two rotatably connected transmission shafts 10 for unidirectional transmission, the transmission shaft 10 is coaxially provided with a measuring wheel 6, and the measuring wheel 6 can be radially displaced along the transmission shaft 10, the transmission shaft 10 is rotatably provided with a transmission assembly 3 inserted into the measuring wheel 6, and the other end of the transmission assembly 3 is inserted into the transmission shaft 10;

[0029] The distance measuring wheel 6 is rotatably connected to a rotating rod 13 rotatably connected to the support frame 4 and the connecting frame 2. When the distance measuring wheel 6 is coaxial with the transmission shaft 10, it moves upward to a limit position. When the distance measuring wheel 6 is not coaxial with the transmission shaft 10, the transmission assembly 3 is not plugged into the transmission shaft 10, so that the distance measuring wheel 6 does not transmit power to the transmission shaft 10. One end of the two transmission shafts 10 that is away from each other is rotatably connected to the connecting frame 2, and the connecting frame 2 is fixed to the push rod 1 through the connecting block 8;

[0030] The support frame 4 is connected to a detector 11 for detecting the number of rotations of the ratchet 9 .

[0031] The detector 11 is a Hall effect sensor or other detection instrument for detecting the number of rotations.

[0032] The support frame 4 and the connecting frame 2 are connected with an articulated rod 12, and a rotating rod 13 is rotatably connected to the articulated rod 12. The rotating rod 13 is fixed with a fixed ring cover rotatably connected to the measuring wheel 6, and the fixed ring cover does not contact the transmission shaft 10 and the connecting sleeve 5.

[0033] During use, a person places the distance measuring wheel 6 on the ground. At this time, the distance measuring wheel 6 is coaxial with the transmission shaft 10, that is, the transmission assembly 3 is plugged into the transmission shaft 10, so that the distance measuring wheel 6 and the transmission shaft 10 are transmitted. At this time, the person pushes the two distance measuring wheels 6 along the ground through the push rod 1, the support frame 4, and the rotating rod 13, that is, the connecting frame 2. During the movement, when one of the distance measuring wheels 6 stops rotating, the other distance measuring wheel 6 rotates stably to ensure the accuracy of the test. During the test, the detector 11 detects the number of rotations of the ratchet wheel 9 and measures the distance based on the number of rotations and the circumference of the distance measuring wheel 6.

[0034] When both measuring wheels 6 are not in contact with the ground (i.e., when a person lifts the measuring wheels 6 via the support frame 4 and the connecting frame 2), the measuring wheels 6 rotate via the rotating rod 13. At this time, the measuring wheels 6 are not coaxial with the transmission shaft 10, and the transmission assembly 3 is separated from the transmission shaft 10. Although the measuring wheels 6 can still rotate, they are not transmitted to the transmission shaft 10. Therefore, the rotation generated by the measuring wheels 6 when they are floating in the air will not be counted in the measured distance, thereby ensuring the accuracy of the measurement.

[0035] In this embodiment, the support frame 4 is fixed with an annular connecting shell 7, and the connecting shell 7 is fixed with a limiting rod 71 which abuts against the outer surface of the inner ring of the distance measuring wheel 6 through a ball bearing. The limiting rod 71 is located above the distance measuring wheel 6;

[0036] By setting the limiting rod 71, the distance measuring wheel 6 cannot move upward when it is coaxial with the transmission shaft 10, so as to ensure that the distance measuring wheel 6 is coaxial with the transmission shaft 10 and ensure normal distance measurement.

[0037] In this embodiment, the connecting shell 7 is rotationally connected to the ratchet 9, the ratchet 9 is rotationally connected to the transmission shaft 10, and the transmission shaft 10 is provided with a pawl that cooperates with the ratchet 9. The cooperation of the pawl of the ratchet 9 realizes one-way transmission to ensure distance measurement.

[0038] In this embodiment, the transmission shaft 10 is provided with an annular groove for placing the measuring wheel 6, and the annular groove does not contact the inner side surface of the inner ring of the measuring wheel 6 (that is, the diameter of the inner side surface of the inner ring of the measuring wheel 6 is larger than the diameter of the annular groove), and the side surface of the annular groove is provided with a transmission hole 101 for plugging in the transmission assembly 3.

[0039] In this embodiment, a rotating groove is formed on the circular side of the ring groove. The transmission assembly 3 includes a follower ring 34 rotatably connected to the rotating groove, a floating hole 33 formed on the follower ring 34, an adjustment disk 32 placed in the floating hole 33, and a connecting rod 31 connected to the adjustment disk 32. The follower ring 34 contacts the distance measuring wheel 6.

[0040] The plug-in rod 31 is elastically connected to the distance measuring wheel 6 through a spring and can be plugged into the transmission hole 101. The adjustment disk 32 moves radially with the distance measuring wheel 6 and moves along the wall of the floating hole 33 to drive the plug-in rod 31 out of the transmission hole 101.

[0041] When in use, the plug-in rod 31 is plugged into the transmission hole 101, and the follower ring 34 rotates synchronously with the distance measuring wheel 6. When the distance measuring wheel 6 rotates, the distance measuring wheel 6 drives the transmission shaft 10 to rotate through the plug-in rod 31 to achieve distance measurement. When the distance measuring wheel 6 is lifted, the distance measuring wheel 6 and the transmission shaft 10 are not aligned with each other. The distance measuring wheel 6 drives the adjustment disk 32 to move along the wall of the floating hole 33 through the plug-in rod 31. During the displacement process, the plug-in rod 31 is driven out of the transmission hole 101, so that the distance measuring wheel 6 and the transmission shaft 10 no longer transmit information.

[0042] When the distance measuring wheel 6 is lowered, the distance measuring wheel 6 is reset, the adjustment disk 32 is reset, the connecting rod 31 is elastically reset, and then the distance measuring wheel 6 is rotated so that the connecting rod 31 is plugged into the transmission hole 101. When the connecting rod 31 is directly plugged into the transmission hole 101, there is no need to rotate the distance measuring wheel 6.

[0043] In this embodiment, an adjustment hole 341 having a diameter larger than that of the plug-in rod 31 is formed on the side of the follower ring 34 facing the distance measuring wheel 6. The adjustment hole 341 is concentrically connected to the floating hole 33.

[0044] During use, the arrangement of the adjustment hole 341 allows the plug-in rod 31 to move along with the displacement of the adjustment disk 32 , thereby ensuring adjustment.

[0045] In this embodiment, the side of the floating hole 33 facing the measuring wheel 6 is funnel-shaped, and the side with a smaller diameter is connected to the adjustment hole 341. The adjustment disk 32 is conical and the end with a smaller diameter is connected to the plug-in rod 31. The diameter of the adjustment disk 32 is larger than the adjustment hole 341.

[0046] During use, the funnel-shaped floating hole 33 and the conical adjusting disk 32 enable the plug-in rod 31 to be driven out of the transmission hole 101 when the adjusting disk 32 is displaced.

[0047] In this embodiment, a circular hole is formed on the follower ring 34, and a resisting shaft 342 is elastically inserted into the circular hole through a spring;

[0048] The friction between the follower ring 34 and the ranging wheel 6 is increased by the setting of the abutting shaft 342, so that the follower ring 34 can rotate synchronously when the ranging wheel 6 rotates;

[0049] The side of the abutting shaft 342 abutting the ranging wheel 6 is a plane, so that the abutting shaft 342 does not lock the ranging wheel 6 when the ranging wheel 6 is displaced radially, ensuring normal radial displacement of the ranging wheel 6.

[0050] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can make modifications to the technical solutions described in the foregoing embodiments, or make equivalent replacements to some of the technical features, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A measuring tool for calculating construction cost, comprising a push rod, characterized in that: A support frame is fixed to the lower end of the push rod, and the support frame is rotatably connected to a ratchet. The ratchet has two rotatably connected transmission shafts for one-way transmission. A distance measuring wheel is coaxially provided on the transmission shaft, and the distance measuring wheel can be displaced radially along the transmission shaft. A transmission assembly is rotatably provided on the transmission shaft and plugged into the distance measuring wheel. The other end of the transmission assembly is plugged into the transmission shaft. The distance measuring wheel is rotatably connected to a rotating rod rotatably connected to the support frame and the connecting frame. When the distance measuring wheel is coaxial with the transmission shaft, it moves upward to a limit position. When the distance measuring wheel is not coaxial with the transmission shaft, the transmission assembly is not plugged into the transmission shaft. One end of the two transmission shafts that are away from each other is rotatably connected to the connecting frame, and the connecting frame is fixed to the push rod; The support frame is connected with a detector for detecting the number of rotations of the ratchet wheel.

2. A measuring tool for construction cost calculation according to claim 1, characterized in that: The support frame is fixed with an annular connecting shell, and the connecting shell is fixed with a limiting rod which abuts against the outer surface of the inner ring of the distance measuring wheel through a ball bearing, and the limiting rod is located above the distance measuring wheel.

3. A measuring tool for construction cost calculation according to claim 2, characterized in that: The connecting shell is rotatably connected to the ratchet, the ratchet is rotatably connected to the transmission shaft, and the transmission shaft is provided with a pawl that cooperates with the ratchet.

4. A measuring tool for construction cost calculation according to claim 3, characterized in that: The transmission shafts are all provided with an annular groove for placing the distance measuring wheel, and the annular groove does not contact the inner side surface of the inner ring of the distance measuring wheel. The side surface of the annular groove is provided with a transmission hole for plugging the transmission component.

5. A measuring tool for construction cost calculation according to claim 4, characterized in that: A rotating groove is formed on the circular side of the ring groove, and the transmission assembly includes a follower ring rotatably connected to the rotating groove, a floating hole formed on the follower ring, an adjustment disk placed in the floating hole, and a plug-in rod connected to the adjustment disk, and the follower ring contacts the distance measuring wheel; The plug-in rod is elastically connected to the distance measuring wheel and can be plugged into the transmission hole. The adjustment disk moves along the floating hole wall as the distance measuring wheel moves radially and drives the plug-in rod to disengage from the transmission hole.

6. A measuring tool for construction cost calculation according to claim 5, characterized in that: An adjusting hole with a diameter larger than that of the plug-in rod is formed on the side of the follower ring facing the distance measuring wheel, and the adjusting hole is concentrically connected to the floating hole.

7. A measuring tool for construction cost calculation according to claim 6, characterized in that: The side of the floating hole facing the distance measuring wheel is funnel-shaped, and the side with a smaller diameter is connected to the adjustment hole. The adjustment disk is conical and the end with a smaller diameter is connected to the plug rod. The diameter of the adjustment disk is larger than the adjustment hole.

8. A measuring tool for construction cost calculation according to claim 7, characterized in that: A circular hole is provided on the follower ring, and a resisting shaft is elastically inserted into the circular hole.

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