Gravity center measuring device

Abstract

The utility model discloses a gravity center measuring device, which relates to the technical field of medical equipment and comprises a measuring plate main body, fixing seats are arranged at four corners of the measuring plate main body, supporting columns are arranged in the fixing seats and at the four corners of the measuring plate main body, lifting lugs are arranged in the middles of the upper surfaces of the four side edges of the measuring plate main body, and the supporting columns are connected with the lifting lugs. The lower surface of the measuring plate main body is provided with supporting beams in the front-back direction and the left-right direction, the supporting beams are of a cross-shaped structure, the supporting beams are arranged corresponding to the lifting lugs, the upper surface of the measuring plate main body is provided with a measuring reference, the gravity center of a workpiece is measured by utilizing a length measuring tool and an electronic tension meter, and if the workpiece is heavy, the measuring reference can be used for measuring the gravity center of the workpiece. The measuring device is simple in method, easy to manufacture and capable of conveniently, flexibly and accurately measuring the weight and the gravity center position of the workpiece.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a center of gravity measuring device. Background Art

[0002] CT machine is a medical imaging device that we are familiar with. The scanning frame is an important part of the CT machine. It is equipped with X-ray tube, high voltage generator, filter, collimator, detector, etc. The scanning frame can rotate and tilt forward and backward during clinical diagnosis. If the centrifugal inertia force generated by each particle on it cannot offset each other, it will cause vibration and noise, which will not only affect the image quality, accelerate bearing wear, shorten the mechanical life, but also cause destructive accidents in serious cases. For this reason, the scanning frame (rotor) must be dynamically balanced. The dynamic balance design not only requires knowing the overall dimensions and interface dimensions of the components, but also the accurate weight of the components and the center of gravity position dimensions, which is crucial to the dynamic balance design of the CT scanning frame. Utility Model Content

[0003] The purpose of the utility model is to provide a center of gravity measuring device to solve the problem that the dynamic balancing design proposed in the above background technology requires not only knowing the component outer dimensions and interface dimensions, but also accurately knowing the component weight and its center of gravity position dimensions, which is crucial to the dynamic balancing design of the CT scanning frame.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a center of gravity measuring device, including a measuring plate body, a fixing seat is provided at the four corners of the measuring plate body, a support column is provided inside the fixing seat and at the four corners of the measuring plate body, a lifting ear is provided at the middle position of the upper surface of the four sides of the measuring plate body, a support beam is provided in the front-to-back direction and the left-to-right direction of the lower surface of the measuring plate body, the support beam is in a cross-shaped structure, the support beam is arranged corresponding to the lifting ear, and a measurement reference is provided on the upper surface of the measuring plate body.

[0005] Preferably, the number of the support columns is four, the upper ends of the four support columns are fixedly connected to the fixing seat by bolts, the lower ends of the four support columns are provided with end balls, and the lower ends of the end balls extend below the support beam.

[0006] Preferably, the measuring board body is in a square structure, and the fixing seat and the hanging ear are integrally formed with the measuring board body by cutting and bending.

[0007] Compared with the prior art, the beneficial effects of the utility model are as follows: the technical solution of the utility model uses a test platform, a length measuring tool, and an electronic dynamometer to measure the center of gravity of a workpiece. If the workpiece is relatively heavy, the measurement can be assisted by a lifting device. The method of the utility model is simple and easy to manufacture, and can conveniently, flexibly and accurately measure the weight and center of gravity position of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is an axonometric drawing of the main structure of the utility model;

[0009] Figure 2 It is a top view schematic diagram of the main structure of the utility model;

[0010] Figure 3 It is a schematic diagram of the main structure of the utility model;

[0011] Figure 4 This is a schematic diagram of the measurement of the main structure of the utility model before testing;

[0012] Figure 5 It is a measurement schematic diagram when testing the main structure of the utility model.

[0013] In the figure: 1- measuring plate body, 2- fixing seat, 3- supporting column, 4- lifting ear, 5- supporting beam, 6- measuring reference, 7- end ball. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0015] See also Figure 1-5 The utility model provides a center of gravity measuring device, including a measuring plate body 1, a fixing seat 2 is provided at the four corners of the measuring plate 1, a supporting column 3 is provided inside the fixing seat 2 and at the four corners of the measuring plate body 1, a lifting ear 4 is provided at the middle position of the upper surface of the four sides of the measuring plate body 1, a supporting beam 5 is provided in the front-back direction and the left-right direction of the lower surface of the measuring plate body 1, the supporting beam 5 is in a cross-shaped structure, the supporting beam 5 is arranged corresponding to the lifting ear 4, and a measuring reference 6 is provided on the upper surface of the measuring plate body 1.

[0016] When in use, a support beam 5 is arranged at the lower end of the measuring plate body 1 to enhance the support strength of the overall equipment for the parts, a fixing seat 2 is arranged at the four corners of the measuring plate body 1, and a support column 3 is arranged on the fixing seat 2, the overall equipment is supported by the support column 3, and a lifting lug 4 is arranged at the middle position of the four sides of the measuring plate body 1, and the tensile gauge is hooked to the lifting lug 4, so as to measure the data, and a measurement reference 6 is arranged on the measuring plate body 1 to provide a measurement basis when measuring the length;

[0017] like Figure 4First, use the length measuring tool to measure the length of the platform board: L1-2, L3-4, and use the dynamometer to confirm the quality of the platform at the lifting position: M1p, M2p, M3p, M4p;

[0018] like Figure 5 , place the parts on the test platform, use the length measuring tool to measure the distance from the edge of the object to be tested to the edge of the board: Y1, Y2, X3, X4; use the dynamometer to confirm the quality of the lifting position: M1, M2, M3, M4;

[0019] The distance from the center of mass (COG) to the edge of the workpiece is calculated by the formula: LY1, LY2, LX3, LX4. By determining the edge mass (M1 and M2) of the plate, the distance from the center of mass of the object to be measured to the edge (length L1 and L2) can be calculated. The width of the plate L1 / 2 = L1 + L, the calculation formula is as follows:

[0020] L1=L1 / 2 / ((M1-M1p) / (M2-M2p)+1);

[0021] L2=L1 / 2 / ((M2-M2p) / (M1-M1p)+1);

[0022] The same method can also be used to calculate the distance from the center of gravity of the object being measured to other edges;

[0023] L3=L3 / 4 / ((M3-M3p) / (M4-M4p)+1);

[0024] L4=L3 / 4 / ((M4-M4p) / (M3-M3p)+1);

[0025] Then find the size from the center of gravity to the edge of the object being measured:

[0026] LY1=L1-Y1=L1 / 2 / ((M1-M2p) / (M2-M2p)+1)-Y1;

[0027] LY2=L2-Y2=L1 / 2 / ((M2-M2p) / (M1-M1p)+1)-Y2;

[0028] LX3=L3-X3=L3 / 4 / ((M3-M3p) / (M4-M4p)+1)-X3;

[0029] LX4=L4-X4=L3 / 4 / ((M4-M4p) / (M3-M3p)+1)-X4;

[0030] Calculate the mass M of the object being measured:

[0031] M=(M1+M2)-(M1p+M2p)=(M3+M4)-(M3p+M4p);

[0032] Flip the part over and place it on the test platform again. Use the same method to find the distance from the center of mass (COG) to the edge in the other direction.

[0033] There are four support columns 3, the upper ends of the four support columns 3 are fixedly connected to the fixing seat 2 by bolts, the lower ends of the four support columns 3 are provided with end balls 7, the lower ends of the end balls 7 extend below the support beam 5, and the end balls 7 are provided at the lower ends of the support columns 3 to improve the wear resistance of the lower ends of the support columns 3 and improve the overall strength of the support columns 3.

[0034] The measuring board body 1 is in a square structure, and the fixing seat 2 and the hanging ear 4 are integrally formed with the measuring board body 1 by cutting and bending, thereby improving the strength of the overall device.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A center of gravity measuring device, characterized in that: The measuring plate body (1) comprises a measuring plate body (1), wherein fixing seats (2) are arranged at the four corners of the measuring plate body (1), support columns (3) are arranged inside the fixing seats (2) and at the four corners of the measuring plate body (1), lifting ears (4) are arranged at the middle positions of the upper surfaces of the four sides of the measuring plate body (1), and support beams (5) are arranged on the lower surface of the measuring plate body (1) in the front-back direction and the left-right direction, wherein the support beams (5) are in a cross-shaped structure and are arranged corresponding to the lifting ears (4), and a measuring reference (6) is arranged on the upper surface of the measuring plate body (1).

2. A center of gravity measuring device according to claim 1, characterized in that: There are four support columns (3), the upper ends of the four support columns (3) are fixedly connected to the fixing seat (2) by bolts, the lower ends of the four support columns (3) are provided with end balls (7), and the lower ends of the end balls (7) extend below the support beam (5).

3. A center of gravity measuring device according to claim 1, characterized in that: The measuring plate body (1) is in a square structure, and the fixing seat (2) and the hanging ear (4) are integrally formed with the measuring plate body (1) by cutting and bending.

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