Auxiliary device for measuring center of cylinder

Abstract

The utility model relates to the technical field of measurement, in particular to an auxiliary device for measuring the center of a cylinder, which comprises a cross-shaped support, a fixed cylinder is fixedly connected to the center of the upper end of the cross-shaped support, a sleeve is sleeved on the fixed cylinder, and a threaded rod is in threaded connection with the interior of the fixed cylinder. The upper end of the threaded rod penetrates through the sleeve and is rotationally connected with the sleeve, a plurality of fixing seats are arranged on the peripheral side of the sleeve at equal intervals, connecting rods are hinged to the upper ends and the lower ends of the fixing seats, the other ends of the two connecting rods are hinged to the upper end and the lower end of a movable seat, and a positioning column is fixedly connected to the outer side wall of the movable seat. According to the utility model, the problem of inaccurate measurement of the central point coordinate of the cylinder in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of measurement, in particular to a cylindrical center measurement auxiliary device. Background Art

[0002] In normal surveying work, especially for some buildings, it is often necessary to measure the coordinates of the center point of a cylinder. However, the measurement mark cannot be placed on the center point of the cylinder. Usually, the peripheral points of a cylinder are measured and estimated based on the diameter or radius of the cylinder. The measurement results are very inaccurate, which is more difficult for situations with high precision requirements.

[0003] Therefore, a measurement auxiliary device is provided for measuring the center point of a cylinder to solve the problems existing in the prior art. Utility Model Content

[0004] In order to solve the above problems of the prior art, the utility model provides a cylinder center measurement auxiliary equipment, which solves the problem of inaccurate measurement of the coordinates of the center point of the cylinder in the prior art.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a cylindrical center measurement auxiliary device, comprising a cross bracket, a fixed cylinder fixedly connected to the center position of the upper end of the cross bracket, a sleeve sleeved on the fixed cylinder, a threaded rod threadedly connected to the inside of the fixed cylinder, the upper end of the threaded rod passes through the sleeve and is rotatably connected to the sleeve, a number of fixed seats are equidistantly arranged on the circumference of the sleeve, the upper and lower ends of the fixed seats are hinged with connecting rods, the other ends of the two connecting rods are hinged to the upper and lower ends of the movable seat, and a positioning column is fixedly connected to the outer side wall of the movable seat.

[0006] Preferably, a slide groove is provided at each support plate of the cross bracket, the lower end of the positioning column passes through the slide groove, a slider is fixedly connected to the positioning column, and the slider is slidably connected in the slide groove.

[0007] Preferably, a limiting strip is fixedly connected to the outer side wall of the fixed tube along the length direction, and the sleeve can only move along the length direction of the fixed tube due to the limiting effect of the limiting strip.

[0008] Preferably, the upper end of the threaded rod is rotatably connected to a target.

[0009] Preferably, a rotating handle is provided on the upper side wall of the threaded rod.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] Place the device above the cylinder to be measured. Rotating the threaded rod drives the sleeve along the length of the fixed cylinder, which in turn drives the positioning posts toward the central axis of the fixed cylinder via the connecting rod until all the positioning posts are clamped against the outer wall of the cylinder. The central axis of the fixed cylinder and the cylinder to be measured are aligned. By collecting the position information of the target set using an instrument such as a total station, the coordinates of the cylinder's center point can be obtained. This device has a simple structure and is easy to install, allowing workers to accurately measure the coordinates of the cylinder's center point. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural diagram of the utility model;

[0013] Figure 2 It is a structural diagram of the working state of the utility model;

[0014] Figure 3 It is a schematic diagram of the structure inside the sleeve of the utility model. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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.

[0016] See also Figures 1 to 3 The utility model provides a technical solution: a cylindrical center measurement auxiliary device, including a cross bracket 1, the upper center position of the cross bracket 1 is fixedly connected to a fixed cylinder 3, the fixed cylinder 3 is sleeved with a sleeve 2, the fixed cylinder 3 is internally threaded with a threaded rod 12, the upper end of the threaded rod 12 passes through the sleeve 2, and the threaded rod 12 is fixedly connected to two limit plates 7, the upper end of the sleeve 2 is located between the two limit plates 7, four fixed seats 4 are equidistantly arranged on the circumference of the sleeve 2, the upper and lower ends of the fixed seat 4 are hinged with a connecting rod 6, the other ends of the two connecting rods 6 are hinged with the upper and lower ends of the movable seat 5, the fixed seat 4 and the movable seat 5 are of equal length, the two connecting rods 6 arranged upper and lower are arranged in parallel, and the outer side wall of the movable seat 5 is fixedly connected with a positioning column 11.

[0017] A sliding groove 10 is provided at each support plate of the cross bracket 1 , and the lower end of the positioning column 11 passes through the sliding groove 10 . A slider 14 is fixedly connected to the positioning column 11 , and the slider 14 is slidably connected in the sliding groove 10 .

[0018] A limiting strip 13 is fixedly connected to the outer side wall of the fixed tube 3 along the length direction. The sleeve 2 can only move along the length direction of the fixed tube 3 due to the limiting effect of the limiting strip 13 .

[0019] The upper end of the threaded rod 12 is rotatably connected to a U-shaped support seat, and the U-shaped support seats are rotatably connected to the target 9.

[0020] A rotating handle 8 is provided on the upper side wall of the threaded rod 12 .

[0021] Working Principle: A worker places the device above the cylinder 15 to be measured. By rotating the threaded rod 12, the sleeve 2 moves along the length of the fixed cylinder 3. This, in turn, drives the positioning posts 11 toward the central axis of the fixed cylinder 3 via the connecting rod 6 until all positioning posts 11 are clamped against the outer wall of the cylinder 15 and the central axis of the fixed cylinder 3 coincides with the central axis of the cylinder 15 to be measured. Position information set on the target 9 is collected using an instrument such as a total station to obtain the coordinates of the center point of the cylinder 15. This device has a simple structure and is easy to install, allowing workers to accurately measure the coordinates of the center point of the cylinder 15.

[0022] The contents not described in detail in this specification belong to the prior art known to those skilled in the art. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A cylindrical center measurement auxiliary device, characterized in that: The invention comprises a cross bracket (1), wherein a fixed cylinder (3) is fixedly connected to the center position of the upper end of the cross bracket (1), a sleeve (2) is sleeved on the fixed cylinder (3), a threaded rod (12) is internally threadedly connected to the fixed cylinder (3), the upper end of the threaded rod (12) passes through the sleeve (2) and is rotatably connected to the sleeve (2), a plurality of fixed seats (4) are equidistantly arranged on the circumference of the sleeve (2), the upper and lower ends of the fixed seats (4) are hinged to connecting rods (6), the other ends of the two connecting rods (6) are hinged to the upper and lower ends of the movable seat (5), and a positioning column (11) is fixedly connected to the outer wall of the movable seat (5).

2. The cylindrical center measurement auxiliary device according to claim 1, characterized in that: A slide groove (10) is provided at each support plate of the cross bracket (1), the lower end of the positioning column (11) passes through the slide groove (10), and a slider (14) is fixedly connected to the positioning column (11), and the slider (14) is slidably connected in the slide groove (10).

3. The cylindrical center measurement auxiliary device according to claim 1, characterized in that: A limiting strip (13) is fixedly connected to the outer side wall of the fixed cylinder (3) along the length direction, and the sleeve (2) can only move along the length direction of the fixed cylinder (3) due to the limiting effect of the limiting strip (13).

4. The cylindrical center measurement auxiliary device according to claim 1, characterized in that: The upper end of the threaded rod (12) is rotatably connected to a target (9).

5. The cylindrical center measurement auxiliary device according to claim 1, characterized in that: A rotating handle (8) is provided on the upper side wall of the threaded rod (12).

Images