Simple mass center measuring device

Abstract

The utility model provides a simple centroid measuring device, which is used for solving the problems of high safety risk, complex measuring steps and high labor intensity in the prior art. The mass center measuring device comprises a bottom plate, a side positioning plate is fixed to one end of the bottom plate, two supporting plates parallel to the side positioning plate are arranged on the bottom plate, a sliding rod is fixedly connected between the supporting plates, a base moves along the sliding rod, a sliding cavity with an upward opening is formed in the base, a top plate slides in the sliding cavity, and a V-shaped groove is formed in the top end of the top plate. Limiting plates are arranged on the sides, away from the base, of the supporting plates, the top plate can enable the projectile body to be away from the limiting plates through a lifting device, and when the top plate is in the lowest state, the top ends of the limiting plates are higher than the top plate. According to the utility model, a projectile body is slightly jacked up by the top plate through the V-shaped groove, the mass center position of a product can be conveniently and quickly measured according to the state of the projectile body, and the operation process is greatly simplified.

Description

Technical Field

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

[0002] During the operation of a rocket projectile, the path passed by its centroid is usually called the ballistic trajectory. The ballistic trajectory is the path describing the movement trajectory of the projectile tip, which can be a straight line, an arc or a complex curve, depending on the launch angle, speed, air resistance of the rocket projectile and other external factors. The centroid of a rocket projectile is an important technical index for the weapon system to exert its effectiveness, and to a certain extent, it determines the success or failure of the weapon system in confronting the target. The centroid deviation from the track is the main factor affecting the initial disturbance and the sinking amount of the projectile to be detected, and it is also the main reason for the collision between the projectile to be detected and the guide rail. The traditional method for measuring the centroid is to use the method of threading a wire through the projectile. The projectile to be detected passes through the wire, and the projectile to be detected is slightly moved within the thin wire loop until the projectile to be detected is balanced left and right. Then, a steel ruler is used to align the zero position with the top surface of the projectile and measure the distance to the wire loop. At this time, the scale value is the distance from the centroid of the projectile to be detected to the top of the projectile. This operation requires at least two people to cooperate to complete, the process is cumbersome, the measurement data error is large, and there is a safety hazard of the projectile to be detected falling off. Content of the Utility Model

[0003] The utility model provides a simple centroid measurement device, which solves the problems of high safety risk, complex measurement steps and high labor intensity in the prior art.

[0004] The technical solution of the utility model is realized as follows:

[0005] A simple centroid measurement device includes a bottom plate. One end of the bottom plate is fixedly provided with a side positioning plate. The bottom plate is provided with two support plates parallel to the side positioning plate. A sliding rod is fixedly connected between the support plates. A base moves along the sliding rod. The base is provided with a sliding cavity with an upward opening. A top plate slides in the sliding cavity. The top end of the top plate is provided with a V-shaped groove. The cross-section of the V-shaped groove opening gradually increases from one end of the top plate to the other end. Limiting plates are provided on the sides of the support plates away from the base. The top plate can move the projectile away from the limiting plates through a lifting device. When the top plate is in the lowest state, the top ends of the limiting plates are higher than the top plate.

[0006] Furthermore, a vertical long circular hole penetrates through the base along the axial direction of the sliding rod. A rotating groove communicated with the sliding cavity is provided on one side of the base. The lifting device includes a pressing rod whose one end can move in the rotating groove. One end of the pressing rod is hinged to the bottom end of the top plate through a pin shaft. The two ends of the pin shaft move up and down along the long circular hole. A connecting plate is hinged to the side wall of the pressing rod. The end of the connecting plate away from the pressing rod slides along the sliding rod. The sliding rod, the pressing rod, the connecting plate, the pin shaft and the base cooperate to form a connecting rod mechanism for the top plate to slide along the sliding cavity. Using the connecting rod mechanism can significantly reduce the manufacturing cost, and it also has the advantages of simple operation, convenient maintenance and strong adaptability.

[0007] Furthermore, one end face of the top plate communicating with the small end of the V-shaped groove is parallel to the side positioning plate. Corresponding notch grooves are provided on both the top plate and the support plate. A steel ruler is fixedly arranged by matching the multiple notch grooves, and the reference line of the steel ruler coincides with the surface of the side positioning plate close to the base. The parallelism between the surface of the small end of the V-shaped groove and the side positioning plate ensures the consistency of the reference surface during measurement, thereby improving the measurement accuracy of the centroid position. It also makes the calibration work more intuitive and easier, contributing to improving the accuracy of the measurement system.

[0008] Furthermore, arc-shaped plates are fixedly arranged at the tops of the limiting plates. The axes of the arc-shaped plates coincide with each other. The arc-shaped plates can abut against the side wall of the projectile. When the top plate is in the lowest state, the bottom end of the arc-shaped plate is higher than the top plate, and the axis of the arc-shaped plate can coincide with the center line of the V-shaped groove. Corresponding notch grooves are provided on the limiting plates. The projectile can quickly coincide with the center line of the V-shaped groove through the self-aligning function of the arc-shaped plate, which can improve the speed of the entire measurement process and reduce the deviation of the projectile during the process of the V-shaped groove jacking up the projectile.

[0009] Furthermore, an inclined surface is provided on one end face of the top plate communicating with the large end of the V-shaped groove. By reducing the thickness at the V-shaped groove of the top plate, the inclined surface design helps to reduce the interference when the top plate contacts the projectile, thereby reducing the potential impact on the position and stability of the projectile.

[0010] Furthermore, a plurality of screw holes communicating with the notch grooves are provided on the support plates, and bolts are screwed in the screw holes. Operators can easily fix or adjust the steel ruler by tightening or loosening the bolts, which simplifies the operation process.

[0011] The beneficial effects that can be produced by this technical solution.

[0012] In the utility model, the top plate slightly jacks up the projectile through the V-shaped groove. According to the state of the projectile, the centroid position of the product can be measured conveniently and quickly, greatly simplifying the operation process. Through the limiting plates, operators can easily adjust the position and posture of the projectile, and ensure the stability of the projectile during the placement process, preventing the projectile from accidentally rolling or slipping during the movement of the base, and at the same time reducing the safety risk and manual labor intensity during product measurement. By replacing the shape of the V-shaped groove opening of the top plate, the centroid measurement requirements of products with different projectile diameters of multiple varieties can be realized, improving the detection efficiency of products and achieving multi-purpose use of one machine. Description of the Drawings

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0014] Figure 1 Schematic three-dimensional structure diagram of the present invention;

[0015] Figure 2 Partial three-dimensional structure diagram of the support plate and the base of the present invention;

[0016] Figure 3 Exploded view of the lifting device and the base of the present invention;

[0017] Figure 4 Schematic three-dimensional structure diagram of the base of the present invention;

[0018] Figure 5 Schematic three-dimensional structure diagram of the top plate of the present invention;

[0019] Figure 6 Cross-sectional view of the top plate of the present invention.

[0020] Wherein: 1, bottom plate; 2, side positioning plate; 3, support plate; 4, sliding rod; 5, base; 6, sliding cavity; 7, top plate; 8, V-shaped groove; 9, limiting plate; 10, lifting device; 11, elastic body; 12, long circular hole; 13, rotating groove; 14, pressing rod; 15, pin shaft; 16, connecting plate; 17, notch groove; 18, steel ruler; 19, arc plate; 20, inclined surface; 21, bolt. Detailed implementation manners

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0022] Such as Figure 1-2As shown in the figure, an embodiment of the present utility model provides a simple centroid measurement device, including a bottom plate 1. One end of the bottom plate 1 is fixedly provided with a side positioning plate 2. There are two support plates 3 parallel to the side positioning plate 2 on the bottom plate 1. A sliding rod 4 is fixedly connected between the support plates 3. A base is movable along the sliding rod 4. There is a sliding cavity 6 with an upward opening on the base 5. A top plate 7 is slidable in the sliding cavity 6. The top end of the top plate 7 is provided with a V-shaped groove 8. The cross-section of the V-shaped groove 8 gradually increases from one end of the top plate 7 to the other end. A limiting plate 9 is provided on the side of each support plate 3 away from the base 5. The top plate 7 can move the projectile 11 away from the limiting plate 9 through a lifting device 10. When the top plate 7 is in the lowest state, the top end of the limiting plate 9 is higher than the top plate 7. The sliding cavity 6 is a square groove, and the shape of the square groove is the same as the bottom surface of the top plate 7, so that the top plate 7 can only slide along the sliding cavity 6. The lifting device 10 can be an electric lifting rod placed in the sliding cavity 6. The telescopic end of the electric lifting rod abuts against the bottom end of the top plate 7. The telescoping of the electric lifting rod makes the top plate 7 slide along the sliding cavity 6.

[0023] During the use process, place the projectile 11 on the limiting plate 9. According to the centroid range of the projectile 11 shown in the drawing, pre-adjust the distance between the base 5 and the side positioning plate 2 in advance. The projectile abuts against the end face of the side positioning plate 2. The side wall of the projectile 11 can be placed on the limiting plate 9. At this time, the operator makes the top plate 7 move along the sliding cavity 6 towards the projectile 11 through the lifting device 10. The top plate 7 slightly lifts the projectile 11 through the V-shaped groove 8. According to the tilting direction of the projectile 11, slowly loosen the pressure rod 14 to make the projectile 11 fall to the top end of the limiting plate 9. Fine-tune the position of the base 5 left and right through the sliding rod 4, and slowly lift the projectile 11 again through the lifting device 10. Observe the horizontal state of the projectile 11. If the single body is tilted, repeat the above steps until the projectile 11 maintains a horizontal state. At this time, measure the distance between the top plate 7 and the support plate 3 to obtain the position of the centroid of the projectile 11. By setting the V-shaped groove 8 with a gradually increasing cross-section, the V-shaped groove 8 can be changed from the traditional surface contact to line contact, achieving the effect of improving the centroid measurement accuracy, reducing the contact area, avoiding unnecessary wear or damage to the projectile 11 during the measurement process, and the V-shaped groove 8 enables the support plate 3 to adapt to projectiles 11 of various specifications, increasing its application range. Through the combined use of fine-tuning the position of the base 5 by the sliding rod 4 and the limiting plate 9, the operator can easily adjust the position and attitude of the projectile 11, ensuring the stability of the projectile 11 during the placement process, preventing the projectile 11 from accidentally rolling or slipping during the movement of the base 5, thereby ensuring the accuracy and safety of the measurement results. Compared with the traditional manual adjustment, it not only improves the efficiency but also reduces the human error, making the entire measurement process more standardized and repeatable.

[0024] As Figure 2-5As shown, a vertical long circular hole 12 runs through the base 5 along the axial direction of the sliding rod 4. A rotating groove 13 communicating with the sliding cavity 6 is provided on one side of the base 5. The lifting device 10 includes a pressure rod 14 whose one end can move in the rotating groove 13. One end of the pressure rod 14 is hinged to the bottom end of the top plate 7 through a pin shaft 15. Both ends of the pin shaft 15 move up and down along the long circular hole 12. A connecting plate 16 is hinged to the side wall of the pressure rod 14. The end of the connecting plate 16 away from the pressure rod 14 slides along the sliding rod 4. The sliding rod 4, the pressure rod 14, the connecting plate 16, the pin shaft 15 and the base 5 cooperate to form a link mechanism for the top plate 7 to slide along the sliding cavity 6.

[0025] During use, press one end of the pressure rod 14 away from the base 5 to make the pressure rod 14 rotate around the end hinged to the link. The end of the pressure rod 14 hinged to the top plate 7 slides upward along the long circular hole 12 through the pin shaft 15, so that the top plate 7 moves upward along the sliding cavity 6. Compared with electric or hydraulic systems, the mechanical lifting mechanism has lower costs, is easier to maintain, and does not require additional energy supply. Moreover, the lifting of the top plate 7 is facilitated by the pressure rod 14, and by extending the distance from the end of the pressure rod 14 away from the base 5 to the connection with the link, the link structure can be made more labor-saving. The top plate 7 is driven to lift by the link mechanism instead of using electric or hydraulic driving devices such as electric push rods, which significantly reduces the equipment cost and maintenance complexity. At the same time, the mechanical link mechanism usually has higher efficiency in transmitting force and motion, reduces energy loss, and improves the overall efficiency of the system. The rotation angle of the pressure rod 14 directly controls the lifting height of the top plate 7. This intuitive connection method enables the operator to more easily control the rising speed and position of the top plate 7, so that the fine adjustment of the position of the top plate 7 can be more easily achieved.

[0026] As Figure 5-6 shown, the end face of the top plate 7 communicating with the small end of the V-shaped groove 8 is parallel to the side positioning plate 2. Corresponding notch grooves 17 are provided on both the top plate 7 and the support plate 3. A steel ruler 18 is fixed by the cooperation of the multiple notch grooves 17. The reference line of the steel ruler 18 coincides with the surface of the side positioning plate 2 close to the base 5. By designing the end face of the top plate 7 communicating with the small end of the V-shaped groove 8 to be parallel to the side positioning plate 2, a stable reference surface is formed. When measuring the centroid position, this reference surface can be used as a reference to make the reading of the steel ruler 18 more accurate. In addition, the reference line of the steel ruler 18 coincides with the surface of the side positioning plate 2, further ensuring the measurement accuracy and reducing the error caused by inconsistent measurement references. And during the process of moving the base 5, the moving distance of the base 5 can be visually observed, which is convenient for the operator to position the base 5 and reduces the time consumed by adjustment. The notch groove 17 can also be used as a storage groove for the steel ruler 18. When the steel ruler 18 is not needed, it can be conveniently stored, avoiding accidental situations such as tripping or scratching caused by the random placement of the steel ruler 18.

[0027] As shown Figure 1 in the figure, arc-shaped plates 19 are fixedly arranged at the top ends of the limiting plates 9, the axes of the arc-shaped plates 19 coincide with each other, the arc-shaped plates 19 can abut against the side walls of the projectiles 11, when the top plate 7 is in the lowest state, the bottom ends of the arc-shaped plates 19 are higher than the top plate 7, and the axes of the arc-shaped plates 19 can coincide with the center line of the V-shaped grooves 8. Corresponding notch grooves 17 are arranged on the limiting plates 9. When the projectiles 11 are placed on the arc-shaped plates 19, the side walls of the projectiles 11 will be guided by the arc-shaped plates 19 and naturally adjusted to the positions coinciding with the axes of the arc-shaped plates 19, significantly improving the accuracy and stability of placement, and reducing the errors and offset risks caused by manually adjusting the projectiles 11. The parts of the arc-shaped plates 19 in contact with the side walls of the projectiles 11 are designed to be smooth, avoiding scratches or abrasions on the surfaces of the projectiles 11 caused by sharp corners. The contact between the arc-shaped plates 19 and the side walls of the projectiles 11 can provide additional support, increasing the stability of the projectiles 11 during the movement of the base 5 and reducing the measurement errors caused by the inclination of the projectiles 11. The arc-shaped plates 19 make it easier to place and fix the projectiles 11, reducing the time for adjustment and calibration, thereby improving the measurement efficiency.

[0028] As shown Figure 5-6 in the figure, an inclined surface 20 is arranged on the end surface of the top plate 7 communicating with the large end of the V-shaped groove 8. By arranging the inclined surface 20, the material thickness at the V-shaped groove 8 can be reduced without sacrificing the overall support strength of the top plate 7, thereby reducing the weight of the top plate 7. The design of the inclined surface 20 makes it easier to identify the support end of the top plate 7 for the projectiles 11, helping the operator quickly and accurately locate the placement positions of the projectiles 11 and reducing the measurement errors caused by misoperation or inaccurate position judgment.

[0029] As shown Figure 1-2 in the figure, a plurality of screw holes communicating with the notch grooves 17 are arranged on the support plates 3, and bolts 21 are screwed in the screw holes. During use, the steel ruler 18 is placed in a plurality of notch grooves 17, the bolts 21 are turned into the screw holes, and the small ends of the bolts 21 apply pressure to the steel ruler 18 to fix the steel ruler 18. The steel ruler 18 can be conveniently fixed through the screw holes and the bolts 21, preventing the steel ruler 18 from shifting. The design of the screw holes and the bolts 21 makes the installation and disassembly of the steel ruler 18 faster and more convenient, thereby improving the work efficiency. The bolts 21 can firmly lock the steel ruler 18, preventing the steel ruler 18 from moving or shifting during measurement, thus ensuring the accuracy and repeatability of measurement.

[0030] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, 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 simple centroid measuring device, comprising a base plate (1), characterized in that: A side positioning plate (2) is fixed to one end of the bottom plate (1), two support plates (3) parallel to the side positioning plates (2) are arranged on the bottom plate (1), a slide bar (4) is fixedly connected between the support plates (3), a base is moved along the slide bar (4), a sliding cavity (6) with an opening facing upward is arranged on the base (5), a top plate (7) slides in the sliding cavity (6), a V-shaped groove (8) is arranged at the top end of the top plate (7), and the cross section of the notch of the V-shaped groove (8) gradually increases from one end to the other end of the top plate (7), a limiting plate (9) is arranged on the side of the support plate (3) away from the base (5), the top plate (7) can make the elastic body (11) away from the limiting plate (9) through a lifting device (10), and when the top plate (7) is in the lowest state, the top end of the limiting plate (9) is higher than the top plate (7).

2. A simple centroid measuring device according to claim 1, characterized in that: The base (5) is penetrated by a vertical oblong hole (12) along the axial direction of the sliding rod (4); a rotating groove (13) connected to the sliding cavity (6) is provided on one side of the base (5); the lifting device (10) comprises a pressure rod (14) with one end movable in the rotating groove (13); one end of the pressure rod (14) is hinged to the bottom end of the top plate (7) through a pin shaft (15); both ends of the pin shaft (15) move up and down along the oblong hole (12); a connecting plate (16) is hinged to the side wall of the pressure rod (14); one end of the connecting plate (16) away from the pressure rod (14) slides along the sliding rod (4); the sliding rod (4), the pressure rod (14), the connecting plate (16), the pin shaft (15) and the base (5) cooperate to form a connecting rod mechanism for the top plate (7) to slide along the sliding cavity (6).

3. A simple centroid measuring device according to claim 1, characterized in that: One end surface of the top plate (7) communicating with the small end of the V-shaped groove (8) is parallel to the side positioning plate (2), and the top plate (7) and the support plate (3) are both provided with mutually corresponding notched grooves (17), and a plurality of the notched grooves (17) are matched with and fixed with a steel ruler (18), and a reference line of the steel ruler (18) coincides with a surface of the side positioning plate (2) close to the base (5).

4. A simple centroid measuring device according to claim 3, characterized in that: The top of each of the limiting plates (9) is fixed with an arc plate (19), the axes of the arc plates (19) coincide with each other, the arc plates (19) can abut against the side wall of the elastic body (11), when the top plate (7) is in the lowest state, the bottom end of the arc plate (19) is higher than the top plate (7), and the axis of the arc plate (19) can coincide with the center line of the V-shaped groove (8), and each of the limiting plates (9) is provided with notch grooves (17) corresponding to each other.

5. A simple centroid measuring device according to claim 1, characterized in that: An end surface of the top plate (7) communicating with the large end of the V-shaped groove (8) is provided with an inclined surface (20).

6. A simple centroid measuring device according to claim 3, characterized in that: The support plate (3) is provided with a plurality of screw holes connected to the notch grooves (17), and bolts (21) are screwed into the screw holes.

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