Gravity center measuring device
By designing the symmetrical structure of carrier simulation parts, workbench and arc plate, the self-balancing and versatility of the center of gravity measurement device are improved, and the problems of size limitation and cumbersome operation in the prior art are solved, and the measurement accuracy and flexibility are improved. .
Patent Information
- Application Number
- CN202421131202.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-22
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-05-22
AI Technical Summary
The existing center of gravity measurement devices have poor versatility, and the size of the product to be tested is limited by the structure of the measurement device itself, so the operation is complicated.
A center of gravity measurement device including a carrier simulator, a workbench, an arc plate and a carrier support are designed. The arc plate and the carrier support have a geometric structure of symmetrical and symmetrical, and the outer arc radius of the arc plate is greater than the bottom of the arc plate. To the height of the theoretical center of gravity of the carrier simulation component, self-balancing is achieved using the principle of energy conservation, simplifying the structure of the measurement device.
The universality of the measurement device is improved, the size of the product to be tested is not limited by the structure of the measurement device, the operation process is simplified, self-balancing adjustment can be achieved, and measurement accuracy and flexibility are improved.
Smart Images
Figure CN222258585U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of measuring tooling, in particular to a center of gravity measuring device. Background Art
[0002] The measurement and calibration of the center of gravity is an important inspection process in the manufacturing process of some products, that is, to determine whether the center of gravity is offset. The traditional methods of center of gravity measurement can be roughly divided into two types: the hoisting multi-point positioning method and the supporting multi-point positioning method. Both methods have defects such as cumbersome operation.
[0003] To this end, the prior art (CN117516801A) provides a device for quickly measuring the axial position of the center of gravity of a small solid rocket engine, which includes a rolling frame, a support assembly, an indicating assembly and a hard base plate; the rolling frame is located on the hard base plate, and includes a large circular ring and a small circular ring that are concentrically fixed; one end of the indicating assembly can rotate freely around the axis, and the other end always points vertically downward to the dial, the dial is clamped on the end face of the small circular ring, and a scale value is provided circumferentially along the upper edge of the dial, indicating the distance from the center of gravity of the engine to its own large end face; two supporting assemblies are centrally symmetrically arranged on the inner wall of the large circular ring of the rolling frame, and the small arc seat, large arc seat and baffle of the supporting assembly are vertically fixed on the inner wall of the large circular ring of the rolling frame in turn to support and position the engine. The application makes a calibration object, pre-calculates the engraved scale value, and then calibrates it through the actual engine. When measuring, it is only necessary to observe the scale value indicated by the pointer to quickly obtain the distance from the center of gravity of the engine to be measured to its large end face.
[0004] However, in the prior art, the product to be tested is placed between the large ring and the small ring of the rolling frame through the support assembly, and the size of the product to be tested that can be measured is limited by the space between the large ring and the small ring, and the versatility is poor. Utility Model Content
[0005] The purpose of the utility model is to provide a gravity center measuring device to solve the above-mentioned defects of the prior art.
[0006] The embodiments of the present invention are implemented by the following technical solutions:
[0007] A center of gravity measuring device, comprising a carrier simulation part, and further comprising:
[0008] A workbench having a top surface with a horizontal work surface;
[0009] The curved plate, whose outer convex surface is placed on the workbench, and
[0010] The carrier support member, the bottom surface of the carrier support member is connected to the inner concave surface of the arc plate by a first fastener, and the carrier simulation member is connected to the top surface of the carrier support member by a second fastener; the surface passing through the central axis of the arc plate and the theoretical center of gravity of the carrier simulation member is defined as a symmetry plane, the arc plate and the carrier support member as a whole present a geometric structure symmetrical about the symmetry plane, and the outer arc radius of the arc plate is greater than the height from the bottom of the arc to the theoretical center of gravity of the carrier simulation member.
[0011] Optionally, the carrier support includes a carrier mounting plate, a direction adjustment plate and a height adjustment plate, the carrier simulation component is connected to the carrier mounting plate, the mounting plate is connected to the top of the direction adjustment plate, the bottom of the direction adjustment plate is connected to the top of the height adjustment plate, and the bottom of the height adjustment plate is connected to the arc plate.
[0012] Optionally, the direction adjustment plate is provided with a plurality of first connection holes, the carrier mounting plate is provided with first threaded holes corresponding to the positions of the first connection holes, and the first connection holes are connected to the first threaded holes through third fasteners.
[0013] Optionally, a plurality of groups of the first threaded holes are provided, and after each group of the first threaded holes is connected to the first connecting holes, the orientation of the direction adjustment plate can be changed.
[0014] Optionally, the carrier mounting plate is disc-shaped, and the direction adjustment plate and the height adjustment plate are rectangular.
[0015] Optionally, the carrier simulation component is provided with a recessed groove that cooperates with the side wall of the carrier mounting plate, the bottom surface of the recessed groove is provided with a plurality of second threaded holes, the carrier mounting plate is provided with second connecting holes corresponding to the positions of the second threaded holes, and the second connecting holes are connected to the second threaded holes through the second fasteners.
[0016] Optionally, the radius of curvature of the arc plate gradually increases in the direction of extension along the symmetric surface toward both ends of the outer side of the arc plate.
[0017] The technical solution of this utility model has at least the following advantages and beneficial effects: the utility model uses the structure of arc plate plus support to connect the carrier simulation part. Since the arc plate and the carrier support part are a geometric structure symmetrical about the symmetry plane, and the arc radius of the arc plate is greater than the height from the bottom of the arc to the theoretical center of gravity of the carrier simulation part, the theoretical center of gravity of the carrier simulation part is located below the central axis of the arc plate. According to the principle of energy conservation, if the center of gravity of the carrier simulation part is offset, the arc plate will rotate on the top surface of the workbench until the center of gravity of the carrier simulation part is at the lowest position, and the overall structure is self-balanced. Compared with the prior art, the overall structure of the measuring device is simplified, so that the size of the product to be measured is not limited by the structure of the measuring device itself, and the versatility of the device is improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.
[0019] Figure 1 An exploded diagram of a center of gravity measuring device provided by the utility model;
[0020] Figure 2 A front view of a center of gravity measuring device provided by the utility model;
[0021] Figure 3 A partial structural schematic diagram of a center of gravity measuring device provided by the utility model;
[0022] Figure 4 is a structural schematic diagram of a carrier simulation component;
[0023] Figure 5 Schematic diagram of the structure of the carrier mounting plate;
[0024] Figure 6 It is a structural schematic diagram of the direction adjustment plate;
[0025] Figure 7 It is a structural schematic diagram of the height adjustment plate;
[0026] Figure 8 is a schematic diagram of the structure of the arc plate;
[0027] Fig. 9 It is a structural diagram of the workbench;
[0028] Fig.10 A schematic diagram of the principle of a gravity center measuring device provided by the utility model;
[0029] Icons: 1-carrier simulation, 101-sink, 102-installation clearance hole, 103-second threaded hole, 2-carrier mounting plate, 201-side wall, 202-second connecting hole, 203-first threaded hole, 204-lifting hole, 3-direction adjustment plate, 301-first connecting hole, 302-third connecting hole, 4-height adjustment plate, 401-third threaded hole, 402-fourth threaded hole, 5-arc plate, 501-inner concave surface, 502-fourth connecting hole, 503-outer convex surface, 6-workbench, 601-horizontal working surface, 602-anchor bolt. DETAILED DESCRIPTION
[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0033] In the description of the present invention, it should be noted that if the terms "upper", "lower", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when used. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0034] refer to Figure 1-3 , a center of gravity measuring device, including a carrier simulation part 1, a workbench 6, an arc plate 5 and a carrier support.
[0035] refer to Fig. 9 The main function of the workbench 6 is to serve as a support carrier. The top surface of the workbench 6 has a horizontal work surface 601. The height of the workbench 6 can be adjusted by four anchor bolts 602 around it to keep the upper surface of the workbench 6 horizontal. It should be understood that the workbench 6 in the accompanying drawings is a schematic diagram. In actual applications, it can of course be replaced by a tool that can reach the horizontal work surface 601.
[0036] The outer convex surface 503 of the arc plate 5 is placed on the workbench 6 and can rotate around its central axis on the workbench 6. Figure 8 The arc plate 5 can be regarded as a part cut from a circular ring. The inner and outer shapes of the arc plate 5 are both arc surfaces, and its thickness is equal to the difference between the radii of the inner and outer arc surfaces.
[0037] The bottom surface of the carrier support is connected to the inner concave surface 501 of the arc plate 5 by a first fastener, and the carrier simulation 1 is connected to the top surface of the carrier support by a second fastener. It should be understood that the present application is the same as the prior art, and the measuring device does not affect the center of gravity position of the carrier simulation 1 in the vertical direction (i.e., perpendicular to the top surface of the workbench 6).
[0038] The center axis of the arc plate 5 and the plane of the theoretical center of gravity O1 of the carrier simulation part are defined as the symmetry plane. The arc plate 5 and the carrier support part are in a geometric structure symmetrical about the symmetry plane (that is, Figure 2 In the figure, the arc plate 5 and the carrier support are symmetrical about the middle part), the outer arc radius D of the arc plate 5 is greater than the height H from the bottom of the arc to the theoretical center of gravity O1 of the carrier simulation, and the difference between the two is d, which is not 0, so that the theoretical center of gravity O1 of the carrier simulation is located below the central axis of the arc plate 5. In this way, according to the principle of energy conservation, if the center of gravity of the carrier simulation 1 is offset, the arc plate 5 will rotate on the top surface of the workbench 6 until the center of gravity of the carrier simulation 1 is at the lowest position, and the overall structure is self-balanced. Compared with the prior art, the overall structure of the measuring device is simplified, so that the size of the product to be measured is not limited by the structure of the measuring device itself, and the versatility of the device is improved.
[0039] Specifically, refer to Fig.10 , the principle of center of gravity determination in this application is as follows:
[0040] When the actual center of gravity O2 of the carrier simulation coincides with the theoretical center of gravity O1 of the carrier simulation, the distance O1A from the theoretical center of gravity O1 of the carrier simulation to any point outside the arc plate 5 is the shortest. At this time, the measuring device is self-balanced in the state shown in the figure.
[0041] When the actual center of gravity O2 of the carrier simulation does not coincide with the theoretical center of gravity O1 of the carrier simulation, with the actual center of gravity O2 of the carrier simulation as the point of the circle, when the circle is just tangent to the outer side of the arc plate 5, the distance from the center of the circle to the tangent point (that is, O2C) is the shortest. According to the principle of conservation of energy, the measuring device as a whole will rotate toward point C until point C contacts the top surface of the workbench 6. During the measurement, the direction of the center of gravity offset of the carrier simulation 1 can be determined by visual inspection or by checking the self-balancing posture of the measuring device with a horizontal laser instrument. Moreover, after the self-balancing of the mixed juice is measured, the counterweight can be changed on the carrier at any time without disassembly and assembly, and the self-balancing state can be observed again until the center of gravity is adjusted to a suitable position.
[0042] In practical applications, the deflection angle of the height adjustment plate 4 when the measuring device is self-balancing can be measured by using detection tools such as a height gauge, and then a mathematical model can be established based on the outer arc radius of the arc plate 5 and the height value from the bottom of the arc plate 5 to the theoretical center of gravity O1 of the carrier simulation part to accurately calculate the center of gravity offset.
[0043] Furthermore, the radius of curvature of the outer side of the arc plate 5 gradually increases in the direction extending from the symmetry plane to both ends, that is, the outer shape of the arc plate 5 has the characteristic that the closer it is to the symmetry plane, the shorter the distance from the outer edge point of the arc plate 5 to the theoretical center of gravity of the carrier simulation component.
[0044] Reference again Figure 1-3 In this embodiment, the carrier support includes a carrier mounting plate 2, a direction adjustment plate 3 and a height adjustment plate 4, the carrier simulation component 1 is connected to the carrier mounting plate 2, the mounting plate is connected to the top of the direction adjustment plate 3, the bottom of the direction adjustment plate 3 is connected to the top of the height adjustment plate 4, and the bottom of the height adjustment plate 4 is connected to the arc plate 5.
[0045] That is, in this embodiment, the support member is a split type, which is formed by connecting three parts. Preferably, the parts of this embodiment are connected by fasteners. Specifically, refer to Figure 5-8 , the direction adjustment plate 3 is provided with a plurality of first connection holes 301, the carrier mounting plate 2 is provided with a first threaded hole 203 corresponding to the position of the first connection hole 301, and the first connection hole 301 is connected to the first threaded hole 203 through a third fastener; the top of the height adjustment plate 4 is provided with a plurality of third threaded holes 401, the direction adjustment plate 3 is provided with a third connection hole 302 corresponding to the position of the third threaded hole 401, and the third connection hole 302 is connected to the third threaded hole 401 through a fourth fastener; the bottom of the height adjustment plate 4 is provided with a plurality of fourth threaded holes 402, the arc plate 5 is provided with a fourth connection hole 502 corresponding to the position of the fourth threaded hole 402, and the fourth connection hole 502 and the fourth threaded hole 402 are connected through a fifth fastener. It is easy to understand that the design of each connection hole and threaded hole should be symmetrical about the symmetry plane to avoid affecting the center of gravity of the measuring device after the fastener is installed, and causing the arc plate 5 to deflect erroneously.
[0046] It should be understood that in other embodiments of the present invention, the support member may be integral, or any two adjacent parts may be integral. The connection between adjacent parts may also be in other forms, such as bonding, welding, etc.
[0047] On the basis of the above, in this embodiment, a plurality of groups of first threaded holes 203 are provided, and after each group of first threaded holes 203 is connected to the first connection hole 301, the orientation of the direction adjustment plate 3 can be changed, thereby achieving the purpose of changing the installation direction of the carrier simulation member 1. Generally, two groups of first threaded holes 203 are designed, that is, the direction adjustment plate 3 can be adjusted in two mutually perpendicular directions, horizontal and vertical.
[0048] In this embodiment, the carrier mounting plate 2 is disc-shaped, and at least two lifting holes 204 may be provided on the carrier mounting plate 2 to facilitate installation. Figure 4-5The carrier simulation part 1 is provided with a sink 101 that matches with the side wall 201 of the carrier mounting plate 2. Specifically, the sink 101 can be set at the installation clearance hole 102 on the carrier mounting plate 2. The bottom surface of the sink 101 is provided with a plurality of second threaded holes 103. The carrier mounting plate 2 is provided with a second connecting hole 202 corresponding to the position of the second threaded hole 103. The second connecting hole 202 is connected to the second threaded hole 103 through a second fastener. The second connecting holes 202 should be distributed in a circular array around the axis of the carrier mounting plate 2 to avoid the change of the center of gravity of the carrier simulation part 1 after the second fastener is installed. In addition, it should be understood that in other embodiments, the sink 101 may not be provided, and the carrier simulation part 1 may be directly placed on the carrier mounting plate 2 and connected through the second fastener. The carrier mounting plate 2 may also be other structures with axial symmetry, such as square, rectangular and other structures.
[0049] In this embodiment, as an option, the direction adjustment plate 3 and the height adjustment plate 4 are rectangular. Of course, in other embodiments, the direction adjustment plate 3 and the height adjustment plate 4 can also be other axially symmetrical structures, such as cylinders, truncated cones, etc.
[0050] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A center of gravity measuring device, comprising a carrier simulation member (1), characterized in that: Also includes: A workbench (6), the top surface of which has a horizontal work surface (601); The arc plate (5) has its outer convex surface (503) placed on a workbench (6), and The carrier support member, the bottom surface of the carrier support member is connected to the inner concave surface (501) of the arc plate (5) by a first fastener, and the carrier simulation member (1) is connected to the top surface of the carrier support member by a second fastener; the surface passing through the central axis of the arc plate (5) and the theoretical center of gravity (O1) of the carrier simulation member is defined as a symmetry plane, the arc plate (5) and the carrier support member as a whole present a geometric structure symmetrical about the symmetry plane, and the outer arc radius of the arc plate (5) is greater than the height from the bottom of the arc to the theoretical center of gravity (O1) of the carrier simulation member.
2. The center of gravity measuring device according to claim 1, characterized in that: The carrier support comprises a carrier mounting plate (2), a direction adjustment plate (3) and a height adjustment plate (4); the carrier simulation member (1) is connected to the carrier mounting plate (2); the mounting plate is connected to the top of the direction adjustment plate (3); the bottom of the direction adjustment plate (3) is connected to the top of the height adjustment plate (4); and the bottom of the height adjustment plate (4) is connected to the arc plate (5).
3. The center of gravity measuring device according to claim 2, characterized in that: The direction adjustment plate (3) is provided with a plurality of first connection holes (301), the carrier mounting plate (2) is provided with first threaded holes (203) corresponding to the positions of the first connection holes (301), and the first connection holes (301) are connected to the first threaded holes (203) via third fasteners.
4. The center of gravity measuring device according to claim 3, characterized in that: The first threaded holes (203) are provided in a plurality of groups, and after each group of first threaded holes (203) is connected to the first connecting hole (301), the orientation of the direction adjustment plate (3) can be changed.
5. The center of gravity measuring device according to claim 2, characterized in that: The carrier mounting plate (2) is in the shape of a disk, and the direction adjustment plate (3) and the height adjustment plate (4) are in the shape of a rectangle.
6. The center of gravity measuring device according to claim 5, characterized in that: The carrier simulation component (1) is provided with a recessed groove (101) matched with the side wall (201) of the carrier mounting plate (2); a plurality of second threaded holes (103) are provided on the bottom surface of the recessed groove (101); the carrier mounting plate (2) is provided with second connecting holes (202) corresponding to the positions of the second threaded holes (103); the second connecting holes (202) are connected to the second threaded holes (103) via the second fasteners.
7. The center of gravity measuring device according to any one of claims 1 to 6, characterized in that: The radius of curvature of the outer side of the arc plate (5) gradually increases in the direction of extension along the symmetric surface towards the two ends.