A weight anti-swing device for a torque standard device

Abstract

The present invention relates to a weight anti-sway device for a torque standard device, comprising a weight loading platform and a weight rack, wherein a connecting column is provided at the lower end of the weight rack, a matching hole that can be loosely matched with the connecting column is provided at one end of the weight loading platform, and an anti-sway mechanism is also included; the base of the anti-sway mechanism is fixed below the weight loading platform, and two clamping pliers can slide relative to each other, and eccentric wheels are provided on the outer sides of the clamping pliers that are separated from each other, and rotating the eccentric wheels can make the clamping pliers slide in the direction of approaching or away from the clamping hole, and a sliding block is also provided in the base, and the sliding block is also connected to a driving mechanism that drives the sliding block to move along its length. The present invention ensures that after the weight is loaded or unloaded, the weight rack and the weight are in a completely free state through the loose matching between the connecting column and the matching hole; during the loading process, the weight is protected from being affected by the surrounding environment by the anti-sway mechanism, and after being clamped, the weight rack can prevent the weight rack from shaking due to trace sound waves and airflow, which leads to the technical problem of affecting the measurement accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of torque standard devices, in particular to a weight anti-swing device of a torque standard device. Background Art

[0002] A deadweight torque standard uses the weight of a weight as the reference force. The reference torque is generated directly or through a lever mechanism, generating it through the action of a lever arm. During the loading and unloading process, the weight and weight support must remain stable to ensure that the weight is loaded or unloaded in the correct position.

[0003] For low-torque standard devices, due to the extremely small mass of the weights, the freely swinging weight rack hung from the main beam is extremely susceptible to environmental influences. Even the slightest sound waves and air currents can cause the weight rack to wobble, making it difficult to maintain stability. Furthermore, during use, the weight rack must remain completely free, and fixing the weights and weight rack is strictly prohibited to avoid affecting measurement accuracy. Therefore, maintaining the stability of the weight rack is a major challenge in low-torque standard devices. Summary of the Invention

[0004] In view of the defects in the prior art, the present invention provides a weight anti-swing device for a torque standard device, which can effectively solve the problem of weight swing in a small torque standard device.

[0005] The cam is secured to the base and has a locking mechanism which allows the cam to move relative to the weight loading mechanism, the cam being secured to the base with a locking mechanism which allows the cam to move relative to the weight loading mechanism.

[0006] Furthermore, the driving mechanism includes a servo motor assembly, a driving rod and a coupling. The servo motor assembly is located at the end of the weight loading platform away from the base. The output end of the servo motor assembly is connected to the coupling. The coupling is transmission-connected to one end of the driving rod. The end of the driving rod away from the coupling is threadedly engaged with the end of the sliding block.

[0007] Furthermore, it also includes a clamping controller connected to the servo motor assembly signal, and the clamping controller signal is connected to a pressure sensor provided on the weight loading platform. When the weight is loaded or unloaded on the weight loading platform, the pressure value of the pressure sensor changes, and the clamping controller controls the operation of the servo motor assembly to make the clamp clamp the lower end of the connecting column.

[0008] Furthermore, a matching sleeve that movably cooperates with the driving rod is provided on the lower surface of the base.

[0009] Furthermore, a clamping portion penetrating the matching hole is provided at the lower end of the connecting column, the clamping portion is clearance-matched with the matching hole, and a clamping layer with clamping surfaces arranged opposite to each other is provided on the outer periphery of the clamping portion.

[0010] Furthermore, a circumferentially rotatable abutment sleeve is sleeved on the outer periphery of the eccentric wheel, and the abutment sleeve can roll with a contact surface provided on the outer side of the clamping pliers.

[0011] Furthermore, the opposite sides of the clamping pliers are provided with arc-shaped clamping surfaces.

[0012] Furthermore, sliding parts that are movably engaged in sliding grooves located on the lower surface of the base are provided on both sides of the upper end of the clamping pliers, and the sliding grooves are arranged along the sliding direction of the clamping pliers.

[0013] Furthermore, guide rails arranged along the sliding direction of the clamping pliers are provided on both sides of the corresponding clamping holes in the base, and the guide rails are slidably matched with the sliding part.

[0014] Furthermore, the guide rail is provided with a spring structure arranged along the sliding direction of the clamping clamp, and the spring structure is connected to a corresponding sliding part. When the eccentric wheel rotates to separate the clamping surface of the clamping clamp from the outer periphery of the connecting column, the spring structure pulls the clamping clamp to move away from the side of the matching hole.

[0015] The beneficial effects of the present invention are as follows: the present invention ensures that after the weights are loaded or unloaded, the weight rack and the weights are in a completely free state through the clearance between the connecting column and the matching hole; during the loading process, the weights are prevented from being affected by the surrounding environment through the anti-sway mechanism, and the two clamping pliers can rotate the eccentric wheel to make their clamping surfaces in close contact with the outer periphery of the lower end of the connecting column to achieve clamping of the connecting column, thereby preventing the weight rack from shaking when the weights are loaded. The present invention uses the sliding block to move the two clamping pliers to move at the same time, thereby improving the displacement accuracy of the clamping pliers; after clamping, the weight rack can prevent the weight rack from shaking due to trace sound waves and airflow, resulting in the technical problem of affecting the measurement accuracy; it has high practical value and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A perspective view of a weight anti-sway device for a torque standard device provided in a specific embodiment of the present invention;

[0017] Figure 2 A cross-sectional view of a weight anti-sway device of a torque standard device provided by a specific embodiment of the present invention;

[0018] In the accompanying drawings: weight loading platform 100, matching hole 110, weight frame 200, connecting column 300, clamping part 310, base 400, clamping hole, clamping pliers 500, eccentric wheel 600, sliding block 700, swing rod 800, servo motor assembly 900, drive rod 1000, coupling 1100, clamping controller 1200, pressure sensor 1300, matching sleeve 1400, abutting sleeve 1500, guide rail 1600, spring structure 1700. DETAILED DESCRIPTION

[0019] It should be noted that the functions and methods described herein are merely routine adaptive applications of existing technologies. Therefore, the present invention's improvement over existing technologies essentially lies in the interconnection between hardware components, rather than in the functions and methods themselves. In other words, while the present invention touches upon some functions and methods, it does not include improvements to these functions and methods themselves. The description of the functions and methods in this invention is intended to better illustrate the present invention and facilitate a better understanding of the present invention.

[0020] The following embodiments of the technical solution of the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are therefore only examples and are not intended to limit the scope of protection of the present invention.

[0021] It should be noted that, unless otherwise specified, the technical or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0022] Example 1:

[0023] Please refer to Figure 1 and Figure 2 The present embodiment provides a weight anti-swing device for a torque standard device, comprising a weight loading platform 100 and a weight rack 200 for placing weights, wherein a connecting column 300 is provided at the lower end of the weight rack 200, and a matching hole 110 that can be clearance-matched with the connecting column 300 is provided at one end of the weight loading platform 100; in this way, the lower end of the weight rack 200 for placing weights is inserted into the matching hole 110 through the connecting column 300, and the connecting column 300 and the matching hole 110 can be clearance-matched, so that after the weights are loaded or unloaded, the weight rack 200 and the weights are in a completely free state, thereby avoiding affecting the measurement accuracy.

[0024] like Figure 1 and Figure 2 As shown, this embodiment also provides an anti-sway mechanism for preventing the weight from shaking during loading; specifically, the anti-sway mechanism includes a base 400 and a pair of clamping pliers 500, the base 400 is fixed below the weight loading platform 100, the base 400 is provided with a clamping hole that is opposite to the matching hole 110, the clamping pliers 500 are relatively arranged on the outside of the clamping hole, the two clamping pliers 500 can slide relative to each other, and the opposite sides of the clamping pliers 500 are provided with arc-shaped clamping surfaces; the outer sides of the clamping pliers 500 are provided with eccentric wheels 600, which are rotated to rotate the clamping pliers 500. The eccentric wheel 600 can make the clamping pliers 500 slide in the direction closer to or away from the clamping hole. A sliding block 700 is also provided in the base 400. The sliding block 700 is hinged with a swing rod 800 at both ends. The end of the swing rod 800 is fixedly connected to the outer periphery of the eccentric wheel 600. The sliding block 700 is also connected to a driving mechanism that drives the sliding block 700 to move along its length. When the sliding block 700 moves horizontally, it can drive the two eccentric wheels 600 to rotate at the same time, so that the clamping surfaces of the two clamping pliers 500 are in close contact or separation with the outer periphery of the connecting column 300 at the same time.

[0025] like Figure 1 and Figure 2 As shown, through the above-mentioned arrangement, the weight can be prevented from being affected by the surrounding environment through the anti-sway mechanism during the loading process, that is, during the weight loading process, the two clamping clamps 500 can rotate the eccentric wheel 600 so that its clamping surface is in close contact with the outer periphery of the lower end of the connecting column 300 to achieve clamping of the connecting column 300, thereby preventing the weight frame 200 from shaking when the weight is loaded. In this technical solution, the sliding block 700 is used to move and drive the two clamping clamps 500 to move at the same time. The sliding block 700 is driven by the driving mechanism to move horizontally. During the movement, the swing rod 800 applies torque to the corresponding eccentric wheel 600, so that the eccentric wheel 600 moves in the same direction at the same time, thereby improving the displacement accuracy of the clamping clamp 500; after clamping, the weight frame 200 can prevent trace sound waves and airflow from causing the weight frame 200 to shake, resulting in a technical problem that the measurement accuracy is affected.

[0026] Example 2:

[0027] like Figure 1 and Figure 2 As shown, this embodiment provides a drive mechanism for driving the sliding block 700 to move. The drive mechanism includes a servo motor assembly 900, a drive rod 1000, and a coupling 1100. The servo motor assembly 900 is located at the end of the weight loading platform 100 away from the base 400. The output end of the servo motor assembly 900 is connected to the coupling 1100. The coupling 1100 is in transmission connection with one end of the drive rod 1000. The end of the drive rod 1000 away from the coupling 1100 is threadedly engaged with the end of the sliding block 700. In this way, when the servo motor is running, it drives the drive rod 1000 to rotate. The coupling 1100 reduces vibration generated by the rotation. The threaded engagement between the drive rod 1000 and the sliding block 700 causes the sliding block 700 to move along its length, thereby driving the sliding block 700. To achieve automated clamping, this embodiment further provides a clamping controller 1200 signal-connected to the servo motor assembly 900. This clamping controller 1200 is signal-connected to a pressure sensor 1300 located on the weight loading platform 100. When weights are loaded or unloaded from the weight loading platform 100, the pressure value of the pressure sensor 1300 changes, and the clamping controller 1200 controls the servo motor assembly 900 to cause the clamping pliers 500 to clamp the lower end of the connecting column 300. Thus, the pressure sensor 1300 detects changes in the weight loading process on the weight rack 200. When the pressure value changes, the clamping controller 1200 controls the servo motor to operate, thereby rapidly clamping the weight loading platform 100.

[0028] In this embodiment, a matching sleeve 1400 that is movably matched with the driving rod 1000 is further provided on the lower surface of the base 400. The matching sleeve 1400 can be movably matched with the driving rod 1000, thereby improving the rotation stability of the driving rod 1000.

[0029] like Figure 1 and Figure 2 As shown, in actual use, the lower end of the connecting post 300 extends downward. To enhance the stability of the clamping forceps 500's clamping, this embodiment provides a clamping portion 310 extending through the mating hole 110 at the lower end of the connecting post 300. The clamping portion 310 has a clearance fit with the mating hole 110, and a clamping layer is provided on the outer periphery of the clamping portion 310, with the clamping surfaces arranged opposite each other. This clearance fit between the clamping portion 310 and the mating hole 110 ensures that the weight holder 200 remains free. The provision of the clamping layer ensures a tight fit between the weight holder 200 and the clamping forceps 500, preventing the weight holder 200 from shaking.

[0030] As previously mentioned, when the eccentric wheel 600 rotates, its outer periphery abuts against the outer periphery of the clamp 500, thereby driving the clamp 500 to move. In this embodiment, a rotatable abutment sleeve 1500 is sleeved around the outer periphery of the eccentric wheel 600. The abutment sleeve 1500 is capable of rolling engagement with a contact surface provided on the outer side of the clamp 500. The abutment sleeve 1500 reduces the frictional force of the rotation of the eccentric wheel 600, further improving the stability of the eccentric wheel 600 driving the clamp 500 to move.

[0031] like Figure 1 and Figure 2 As shown, in order to slide the clamp 500 onto the base 400, this embodiment has sliding portions on both sides of the upper end of the clamp 500 that snap into sliding grooves located on the lower surface of the base 400. The sliding grooves are arranged along the sliding direction of the clamp 500. In addition, guide rails 1600 are provided on both sides of the corresponding clamping holes in the base 400, which are arranged along the sliding direction of the clamp 500. The guide rails 1600 slidably engage with the sliding portions. In this way, the sliding portions that snap into the base 400 can slide and engage with the guide rails 1600, allowing the clamp 500 to move stably along the guide rails 1600.

[0032] In practice, after the weight is loaded, the eccentric wheel 600 needs to be separated from the outer periphery of the clamping jaws 500. In this embodiment, a spring structure 1700 is provided on the guide rail 1600 and arranged along the sliding direction of the clamping jaws 500. The spring structure 1700 is connected to a corresponding sliding portion. Thus, when the eccentric wheel 600 rotates to separate the clamping surface of the clamping jaws 500 from the outer periphery of the connecting column 300, the spring structure 1700 pulls the clamping jaws 500 away from the mating hole 110. This ensures that the weight holder 200 is quickly and completely free to avoid affecting subsequent measurement.

[0033] In summary, in the technical solution of the present invention, the lower end of the weight rack for placing weights is inserted into the matching hole through the connecting column, and the connecting column and the matching hole can be loosely matched, so that after the weights are loaded or unloaded, the weight rack and the weights are in a completely free state, avoiding affecting the measurement accuracy. During the loading process of the weights, the anti-sway mechanism is used to prevent the equipment from being affected by the surrounding environment. That is, during the weight loading process, the two clamps can rotate the eccentric wheel so that the clamping surface is in close contact with the outer periphery of the lower end of the connecting column to achieve clamping of the connecting column, avoiding the weight rack from shaking when the weight is loaded. In this technical solution, the sliding block is used to move the two clamps at the same time. The sliding block is driven by the driving mechanism to move horizontally. During the movement, the swing rod applies torque to the corresponding eccentric wheel, so that the eccentric wheels move in the same direction at the same time, thereby improving the displacement accuracy of the clamps. After clamping, the weight rack can prevent the weight rack from shaking due to trace sound waves and airflow, which leads to the technical problem of affecting the measurement accuracy.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.

Claims

1. A weight anti-sway device for a torque standard device, comprising a weight loading platform (100) and a weight rack (200) for placing weights, wherein a connecting column (300) is provided at the lower end of the weight rack (200), and a matching hole (110) is provided at one end of the weight loading platform (100) to be able to fit with the connecting column (300) in a clearance manner; characterized in that: The anti-sway mechanism also includes a base (400) and a pair of clamping pliers (500), wherein the base (400) is fixed below the weight loading platform (100), and a clamping hole directly opposite to the matching hole (110) is provided on the base (400), and the clamping pliers (500) are relatively arranged outside the clamping hole, and the two clamping pliers (500) can slide relative to each other; an eccentric wheel (600) is provided on the opposite outer sides of the clamping pliers (500), and rotating the eccentric wheel (600) can make the clamping pliers (500) move closer to or away from the clamping hole. The base (400) is provided with a sliding block (700), and the two ends of the sliding block (700) are hinged with swing rods (800), and the ends of the swing rods (800) are fixedly connected to the outer periphery of the eccentric wheel (600). The sliding block (700) is also connected to a driving mechanism for driving the sliding block (700) to move along its length. When the sliding block (700) moves horizontally, it can drive the two eccentric wheels (600) to rotate at the same time, so that the clamping surfaces of the two clamps (500) are in close contact or separation with the outer periphery of the connecting column (300) at the same time.

2. The weight anti-sway device of the torque standard device according to claim 1, characterized in that: The driving mechanism comprises a servo motor assembly (900), a driving rod (1000) and a coupling (1100); the servo motor assembly (900) is located at one end of the weight loading platform (100) away from the base (400); the output end of the servo motor assembly (900) is connected to the coupling (1100); the coupling (1100) is transmission-connected to one end of the driving rod (1000); and the end of the driving rod (1000) away from the coupling (1100) is threadedly engaged with the end of the sliding block (700).

3. The weight anti-sway device of the torque standard device according to claim 2, characterized in that: The invention also includes a clamping controller (1200) connected to the servo motor assembly (900) by signal. The clamping controller (1200) is connected to the pressure sensor (1300) provided on the weight loading platform (100) by signal. When the weight is loaded or unloaded on the weight loading platform (100), the pressure value of the pressure sensor (1300) changes, and the clamping controller (1200) controls the servo motor assembly (900) to operate so that the clamping pliers (500) clamp the lower end of the connecting column (300).

4. The weight anti-sway device of the torque standard device according to claim 2, characterized in that: The lower surface of the base (400) is provided with a matching sleeve (1400) that movably matches the driving rod (1000).

5. The weight anti-sway device of the torque standard device according to claim 1, characterized in that: The lower end of the connecting column (300) is provided with a clamping portion (310) penetrating the matching hole (110), the clamping portion (310) is clearance-matched with the matching hole (110), and the outer periphery of the clamping portion (310) is provided with a clamping layer with clamping surfaces arranged opposite to each other.

6. The weight anti-sway device of the torque standard device according to claim 1, characterized in that: The outer periphery of the eccentric wheel (600) is covered with a circumferentially rotatable abutting sleeve (1500), and the abutting sleeve (1500) can be in rolling engagement with a contact surface provided on the outer side of the clamping pliers (500).

7. The weight anti-sway device of the torque standard device according to claim 1, characterized in that: The opposite sides of the clamping pliers (500) are provided with arc-shaped clamping surfaces.

8. The weight anti-sway device of the torque standard device according to claim 1, characterized in that: Both sides of the upper end of the clamp (500) are provided with sliding parts () that are movably engaged in the sliding grooves located on the lower surface of the base (400), and the sliding grooves are arranged along the sliding direction of the clamp (500).

9. The weight anti-swing device of the torque standard device according to claim 8, characterized in that: Guide rails (1600) arranged along the sliding direction of the clamping pliers (500) are provided on both sides of the corresponding clamping holes in the base (400), and the guide rails (1600) are slidably matched with the sliding part.

10. The weight anti-swing device of the torque standard device according to claim 9, characterized in that: The guide rail (1600) is provided with a spring structure (1700) arranged along the sliding direction of the clamping pliers (500), and the spring structure (1700) is connected to a corresponding sliding part. When the eccentric wheel (600) rotates to separate the clamping surface of the clamping pliers (500) from the outer periphery of the connecting column (300), the spring structure (1700) pulls the clamping pliers (500) to move away from the side of the matching hole (110).

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