A long-axis counterweight assembly for uniaxial mechanical acceleration measurement

Abstract

This utility model discloses a long-axis counterweight assembly for uniaxial mechanical acceleration measurement, relating to the technical field of uniaxial mechanical acceleration detection equipment. It includes a first base with a cylindrical groove on it. An I-shaped counterweight is disposed within the cylindrical groove. The I-shaped counterweight includes an upper platform and a lower platform of equal diameter. A support rod is disposed between the upper and lower platforms. The upper platform, lower platform, and support rod are integrally formed. The outer circumferential surfaces of the upper and lower platforms are clearance-fitted with the inner wall of the cylindrical groove. Exhaust holes are provided on the upper and lower platforms. The outer circumferential surfaces of the upper and lower platforms are clearance-fitted with the inner wall of the cylindrical groove and are smoothed to significantly reduce sliding friction. The symmetrical exhaust holes on the upper and lower platforms allow for rapid airflow when the I-shaped counterweight moves, avoiding the air cushion effect, ensuring response speed, and achieving dynamic air pressure balance.

Description

Technical Field

[0001] This utility model relates to the technical field of uniaxial mechanical acceleration detection equipment, specifically a long-axis counterweight assembly for uniaxial mechanical acceleration measurement. Background Technology

[0002] In the field of mechanical acceleration measurement, traditional acceleration sensors typically rely on electronic detection principles such as piezoelectric, capacitive, or electromagnetic sensors. While these sensors offer high accuracy, they may fail under harsh environments (such as high temperatures, strong vibrations, and electromagnetic interference). Therefore, purely mechanical acceleration detection devices, due to their simple structure, high reliability, and strong anti-interference capabilities, still have wide applications in fields such as industrial safety, vehicle collision avoidance, and vibration monitoring.

[0003] Existing mechanical acceleration measuring devices typically employ a mass-spring structure, where the mass is displaced by inertial force, triggering a mechanical switch or alarm mechanism. However, traditional designs suffer from the following problems: Frictional resistance affects sensitivity: friction between the mass block and the guide structure can hinder movement, leading to response delays or misjudgments.

[0004] Air cushion effect: When a mass moves in a confined space, the compression or rarefaction of air creates resistance, reducing the dynamic response speed. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a long-axis counterweight assembly for uniaxial mechanical acceleration measurement.

[0006] The objective of this utility model is achieved through the following technical solution: A long-axis counterweight assembly for uniaxial mechanical acceleration measurement includes a first base with a cylindrical groove. An I-shaped counterweight is disposed in the cylindrical groove. The I-shaped counterweight includes an upper platform and a lower platform with equal diameters. A support rod is disposed between the upper platform and the lower platform. The upper platform, the lower platform, and the support rod are integrally formed. The outer circumferential surfaces of the upper platform and the lower platform are clearance-fitted with the inner wall of the cylindrical groove. Vent holes are provided on the upper platform and the lower platform.

[0007] Preferably, a first spring is provided between the bottom of the lower platform and the bottom of the cylindrical groove.

[0008] Preferably, a pressure ring is installed on the inner wall of the cylindrical groove, and the first spring drives the lower platform to move upward so that the upper platform abuts against the bottom of the pressure ring.

[0009] Preferably, the upper platform and the lower platform each have two exhaust holes, and the exhaust holes are symmetrically distributed about the central axis of the support rod.

[0010] Preferably, a first positioning hole for accommodating the first spring is provided at the center of the bottom of the lower platform.

[0011] Preferably, a conical boss is fixedly connected to the center of the upper platform.

[0012] Preferably, the support rod is a hollow cylindrical structure, and the two ends of the support rod are located at the center of the upper platform and the lower platform.

[0013] The beneficial effects of this utility model are: In this application, the outer circumferential surfaces of the upper and lower platforms are fitted with the inner wall of the cylindrical groove with clearance and are smoothed by grinding, which significantly reduces sliding friction and ensures that the I-shaped counterweight can move quickly and smoothly under acceleration, thereby improving detection sensitivity. The upper and lower platforms are symmetrically equipped with exhaust holes, which allows air to circulate rapidly when the I-shaped counterweight moves, avoiding the air cushion effect (air compression or negative pressure hindering movement), ensuring response speed, and achieving dynamic air pressure balance. The I-shaped counterweight (upper platform, lower platform, and support rod) is made of one piece or welded, which ensures structural rigidity and integrity and avoids the movement trajectory being affected by loosening or deformation. The support rod adopts a hollow cylindrical structure, which reduces weight while maintaining sufficient support strength, making the movement of the counterweight more stable and meeting the requirements of high stability and reset accuracy. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the connection structure between the first base and the I-shaped counterweight of this utility model; Figure 2 For the present utility model Figure 1 A schematic diagram of the cross-sectional structure; Figure 3 This is a schematic diagram of the overall structure of this utility model; In the figure, 1. First base; 2. Cylindrical groove; 3. I-shaped counterweight; 4. Upper platform; 5. Lower platform; 6. Support rod; 7. Vent hole; 8. First spring; 9. Pressure ring; 10. First positioning hole; 11. Conical boss; 12. Positioning rod. Detailed Implementation

[0015] Example 1: like Figures 1-3As shown, a long-axis counterweight assembly for uniaxial mechanical acceleration measurement is provided, including a first base 1. A cylindrical groove 2 is formed on the first base 1 to accommodate an I-shaped counterweight 3, which is movable along the axial direction. The I-shaped counterweight 3 in the cylindrical groove 2 includes an upper platform 4 and a lower platform 5 of equal diameter. A support rod 6 is provided between the upper platform 4 and the lower platform 5. The support rod 6 is a hollow cylindrical structure, with both ends located at the centers of the upper platform 4 and the lower platform 5. The upper platform 4, the lower platform 5, and the support rod 6 are integrally formed and can be fixed together by welding or by mold casting. The contact surfaces of the upper platform 4 and the lower platform 5 with the cylindrical groove 2 are polished smooth to reduce sliding resistance. To better facilitate relative sliding, the annular surfaces of the upper platform 4 and the lower platform 5 are clearance-fitted with the inner wall of the cylindrical groove 2. The upper platform 4 and the lower platform 5 are circular structures with equal diameters, slightly smaller than the diameter of the cylindrical groove 2. Each of the upper platform 4 and the lower platform 5 has two exhaust holes 7, symmetrically distributed about the central axis of the support rod 6. The exhaust holes 7 are used to balance the internal air pressure generated when the I-shaped counterweight 3 moves. The bottom of the lower platform 5 is flush with the bottom of the cylindrical groove 2. A first spring 8 is installed between the upper platform 4 and the lower platform 5. A pressure ring 9 is installed on the inner wall of the cylindrical groove 2. The first spring 8 pushes the lower platform 5 upward, so that the upper platform 4 abuts against the bottom of the pressure ring 9. When the conical boss 11 disengages from the conical sleeve, the pressure ring 9 is supported by the inner wall of the cylindrical groove 2. The pressure ring 9 then restricts the I-shaped counterweight 3 from continuing to move upward. When subjected to an upward acceleration, the I-shaped counterweight 3 moves downward in the cylindrical groove 2 on the first base 1. During the downward movement, the first spring 8 is compressed, and the air below the lower platform 5 is discharged through the exhaust hole 7 to avoid air pressure hindering the movement. When the external force disappears, the first spring 8 pushes the I-shaped counterweight 3 back to its initial position. A first positioning hole 10 is provided at the center of the bottom of the platform 5 to accommodate the first spring 8. The first positioning hole 10 is used to position the first spring 8. A positioning rod 12 is welded at the center of the bottom of the cylindrical groove. The positioning rod 12 is used to constrain the first spring 8 to prevent the first spring 8 from shifting or tilting after compression. Preferably, a conical boss 11 is fixedly connected to the center of the upper platform 4. The conical boss 11 restricts the radial movement of the top conical sleeve. When subjected to an upward acceleration force, the conical boss 11 and the I-shaped counterweight 3 move downward in the first base 1 as a whole, so that the conical boss 11 is released from the limit on the conical sleeve, the conical sleeve moves radially, and an alarm is triggered.

[0016] Among them, such as Figure 3As shown, C1 is the longitudinal axis of movement, and C2 is the transverse axis of movement. That is, the conical boss 11 moves up and down along axis C1. The I-shaped counterweight 3 in axis C1 can slide within the first base 1. The first spring 8 is in a compressed state, driving the conical boss 11 on the top of the I-shaped counterweight 3 to abut against the side of the conical sleeve, restricting the conical sleeve from moving to the right along axis C2. This will prevent the right-end alarm device from being triggered. When subjected to an upward acceleration force along axis C1, the I-shaped counterweight 3 moves downward along axis C1 within the first base 1. The conical boss 11 exits the area that blocks the movement of the conical sleeve. The conical sleeve 10 is affected by the spring at its left end and pushes the conical sleeve to the right along axis C2, thereby triggering the alarm.

[0017] Working principle: This long-axis counterweight assembly, based on inertial mechanics and a spring reset mechanism, is used to detect uniaxial (vertical) mechanical acceleration and trigger an alarm. In the initial state (no acceleration): the first spring 8 is compressed, pushing the I-shaped counterweight block 3 (including the upper platform 4, lower platform 5, and support rod 6) upwards until the top surface of the upper platform 4 is tightly against the bottom of the pressure ring 9. At this time, the I-shaped counterweight block 3 is at the top of the cylindrical groove 2. The conical boss 11, fixed at the center of the upper platform 4, is inserted into the top conical sleeve, limiting the radial movement of the sleeve through the conical surface fit, maintaining the alarm mechanism in a locked state. When subjected to upward acceleration, under the action of inertial force, when the first base 1 experiences upward acceleration (such as impact, vibration, etc.), the I-shaped counterweight block 3 maintains a relatively stationary tendency due to inertia and moves downwards relative to the base. The lower platform 5 compresses the first spring 8, storing energy in the spring. The air between the lower platform 5 and the bottom of the groove is symmetrically displaced. Air vent 7 is quickly discharged to avoid air pressure resistance affecting the response speed of the counterweight. The downward movement of the I-shaped counterweight 3 causes the conical boss 11 to disengage from the conical sleeve. The conical sleeve loses its radial limit and undergoes radial displacement under the drive of an external mechanism (such as a spring), triggering an alarm signal. When the acceleration disappears, the first spring 8 releases its stored energy, pushing the I-shaped counterweight 3 upward to reset. During the upward movement, external air enters below the lower platform 5 through the exhaust vent 7 to avoid negative pressure hindering the movement. The conical boss 11 is reinserted into the conical sleeve, restoring the radial constraint on the sleeve, and the alarm state is deactivated.

Claims

1. A long-axis counterweight assembly for uniaxial mechanical acceleration measurement, characterized in that, Includes a first base (1), on which a cylindrical groove (2) is provided, and an I-shaped counterweight (3) is provided in the cylindrical groove (2). The I-shaped counterweight (3) includes an upper platform (4) and a lower platform (5) of equal diameter. A support rod (6) is provided between the upper platform (4) and the lower platform (5). The upper platform (4), the lower platform (5) and the support rod (6) are integrally formed. The outer circumferential surfaces of the upper platform (4) and the lower platform (5) are in clearance fit with the inner wall of the cylindrical groove (2). Vent holes (7) are provided on the upper platform (4) and the lower platform (5).

2. The long-axis proof mass assembly for uniaxial mechanical acceleration measurement according to claim 1, wherein A first spring (8) is provided between the bottom of the lower platform (5) and the bottom of the cylindrical groove (2).

3. The long-axis proof mass assembly for uniaxial mechanical acceleration measurement according to claim 2, wherein A pressure ring (9) is installed on the inner wall of the cylindrical groove (2). The first spring (8) drives the lower platform (5) to move upward, so that the upper platform (4) abuts against the bottom of the pressure ring (9).

4. A long-axis counterweight assembly for uniaxial mechanical acceleration measurement according to claim 2, characterized in that, Both the upper platform (4) and the lower platform (5) have exhaust holes (7), with two holes on each platform, and the exhaust holes (7) are symmetrically distributed about the central axis of the support rod (6).

5. A long-axis counterweight assembly for uniaxial mechanical acceleration measurement according to claim 2, characterized in that, The lower platform (5) has a first positioning hole (10) at the bottom center for accommodating the first spring (8).

6. A long-axis counterweight assembly for uniaxial mechanical acceleration measurement according to claim 1, characterized in that, A conical boss (11) is fixedly connected to the center of the upper platform (4).

7. A long-axis counterweight assembly for uniaxial mechanical acceleration measurement according to claim 2, characterized in that, The support rod (6) is a hollow cylindrical structure, and the two ends of the support rod (6) are located at the center of the upper platform (4) and the lower platform (5).

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