Weight anti-swing device of torque standard device

Abstract

The invention relates to a weight anti-swing device of a torque standard device, which comprises a weight loading table and a weight frame, a connecting column is arranged at the lower end of the weight frame, a matching hole capable of being in clearance fit with the connecting column is formed in one end of the weight loading table, and the weight anti-swing device further comprises an anti-swing mechanism; a base of the anti-swing mechanism is fixed below the weight loading table, two clamping pincers can slide relatively, eccentric wheels are arranged on the outer sides, away from each other, of the clamping pincers, the clamping pincers can slide in the direction close to or away from the clamping hole by rotating the eccentric wheels, a sliding block is further arranged in the base, and the sliding block is further connected with a driving mechanism for driving the sliding block to move in the length direction of the sliding block. Through clearance fit between the connecting column and the matching hole, the weight frame and the weight are ensured to be in a completely free state after the weight is loaded or unloaded; in the loading process of the weight, the device is prevented from being affected by the surrounding environment through the anti-swing mechanism, and the technical problem that the metering precision is affected due to the fact that the weight frame shakes due to trace sound waves and airflow after being clamped can be solved.

Description

Technical Field

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

[0002] The static weight torque standard device uses the weight of the weight as the standard force value, and generates the standard torque through the action of the lever arm directly or after being amplified by a certain lever mechanism. The static weight torque standard device requires the weight and the weight placement frame to remain stable during the weight loading or unloading process to ensure that the weight can be loaded in the correct position or unloaded to the correct position.

[0003] For the small torque standard device, since the mass of the weight is very small, the weight rack hanging on the main beam and swinging freely is extremely susceptible to the surrounding environment. A small amount of sound waves and airflow can cause the weight rack to shake, making it difficult to keep it stable. At the same time, during use, it is strictly required that the weight rack must be completely free, and it is absolutely not allowed to fix the weight and the weight rack to avoid affecting the measurement accuracy; therefore, how to keep the weight rack stable is a difficult problem in the small torque standard device. 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 of a small torque standard device.

[0005] The technical solution adopted by the present invention is: a weight anti-swing device for a torque standard device, comprising a weight loading platform and a weight rack for placing weights, a connecting column being provided at the lower end of the weight rack, a matching hole being provided at one end of the weight loading platform and being able to match the gap with the connecting column, and also comprising an anti-swing mechanism; the anti-swing mechanism comprises a base and a pair of clamping pliers, the base being fixed below the weight loading platform, a clamping hole being provided on the base and being directly opposite to the matching hole, the clamping pliers being relatively arranged on the outside of the clamping hole, and the two clamping pliers being able to slide relative to each other; an eccentric wheel is provided on the outer sides of the clamping pliers which are opposite to each other, and rotating the eccentric wheel can make the clamping pliers slide in the direction of approaching or moving away from the clamping hole, a sliding block is also provided in the base, swing rods are hinged at both ends of the sliding block, the end of the swing rod is fixedly connected to the outer periphery of the eccentric wheel, the sliding block is also connected to a driving mechanism for driving the sliding block to move along its length direction, and the sliding block can drive the two eccentric wheels to rotate simultaneously when moving horizontally, so that the clamping surfaces of the two clamps are in close contact or separation with the outer periphery of the connecting column at the same time.

[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 arranged 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 which 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 at the outer periphery of the clamping portion.

[0010] Furthermore, the eccentric wheel is covered with a circumferentially rotatable abutment sleeve on its outer periphery, and the abutment sleeve can roll with a contact surface arranged 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, both sides of the upper end of the clamp are provided with sliding parts that are movably inserted into the sliding grooves located on the lower surface of the base, and the sliding grooves are arranged along the sliding direction of the clamp.

[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, a spring structure is provided on the guide rail and arranged along the sliding direction of the clamp, and the spring structure is connected to a corresponding sliding part. When the eccentric wheel rotates to separate the clamping surface of the clamp from the outer periphery of the connecting column, the spring structure pulls the clamp to move away from 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 cooperation between the connecting column and the matching hole; during the loading process of the weights, the anti-sway mechanism is used to prevent the equipment from being affected by the surrounding environment, and the two clamping pliers can rotate the eccentric wheel to make their clamping surfaces closely contact 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 a 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 technical problems such as affecting the measurement accuracy; it has high practical value and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional diagram of a weight anti-sway device of 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 in a specific embodiment of the present invention;

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

[0019] It should be noted here that the functions and methods involved in the present invention are merely conventional adaptive applications of the prior art. Therefore, the improvement of the prior art by the present invention is essentially the connection relationship between the hardware, rather than the functions and methods themselves. That is, although the present invention involves some functions and methods, it does not include improvements to the functions and methods themselves. The description of the functions and methods in the present invention is to better illustrate the present invention so as to better understand the present invention.

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

[0021] It should be noted that, unless otherwise specified, the technical terms 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] Embodiment 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 loosely 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 loosely 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 directly 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 that are separated from each other are provided with eccentric wheels 600, and the eccentric wheels 600 are rotated to rotate the eccentric wheels 600. The eccentric wheel 600 can make the clamping pliers 500 slide in the direction close to or away from the clamping hole. A sliding block 700 is also provided in the base 400. Swing rods 800 are hinged at both ends of the sliding block 700. 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 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 clamps 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 loading process, the two clamping pliers 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 rack 200 from shaking when the weight is loaded. In this technical solution, a sliding block 700 is used to move the two clamping pliers 500 at the same time. The sliding block 700 is driven by a driving mechanism to move horizontally. When moving, a torque is applied to the corresponding eccentric wheel 600 through the swing rod 800, so that the eccentric wheel 600 moves in the same direction at the same time, thereby improving the displacement accuracy of the clamping pliers 500; after clamping, the weight rack 200 can prevent trace sound waves and airflow from causing the weight rack 200 to shake, resulting in a technical problem that the measurement accuracy is affected.

[0026] Embodiment 2:

[0027] like Figure 1 and Figure 2 As shown, this embodiment provides a driving mechanism for driving the sliding block 700 to move, and the driving mechanism includes 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, and the output end of the servo motor assembly 900 is connected to the coupling 1100. The coupling 1100 is transmission-connected with 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. In this way, when the servo motor is running, it drives the driving rod 1000 to rotate, and the vibration generated by the rotation is reduced under the action of the coupling 1100. The sliding block 700 moves along its length through the threaded engagement of the driving rod 1000 and the sliding block 700, thereby driving the sliding block 700. In order to realize the automatic clamping operation, the present embodiment further provides 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. In this way, the weight loading change process on the weight rack 200 is detected by the pressure sensor 1300. When the pressure value changes, the servo motor can be controlled to operate by the clamping controller 1200, so that the weight loading platform 100 is quickly clamped.

[0028] In this embodiment, a matching sleeve 1400 that is movably matched with the driving rod 1000 is also 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 stability of the driving rod 1000 in rotation.

[0029] like Figure 1 and Figure 2 As shown, in actual application, the lower end of the connecting column 300 extends downward. In order to improve the stability of the clamping of the clamping pliers 500, the present embodiment provides a clamping portion 310 penetrating the matching hole 110 at the lower end of the connecting column 300. The clamping portion 310 is in clearance fit with the matching hole 110, and a clamping layer with clamping surfaces arranged opposite to each other is provided on the outer periphery of the clamping portion 310. In this way, since the clamping portion 310 is in clearance fit with the matching hole 110, it can ensure that the weight rack 200 can be in a free state. By providing the clamping layer, it can ensure the tightness of its fit with the clamping pliers 500, and prevent the weight rack 200 from shaking.

[0030] As mentioned above, 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 circumferentially rotatable abutting sleeve 1500 is sleeved on the outer periphery of the eccentric wheel 600, and the abutting sleeve 1500 can roll with the contact surface provided on the outer side of the clamp 500. Under the action of the abutting sleeve 1500, the friction force of the rotation of the eccentric wheel 600 can be reduced, 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, the present embodiment provides sliding parts on both sides of the upper end of the clamp 500 that can be movably inserted into the sliding groove on the lower surface of the base 400, and the sliding groove is arranged along the sliding direction of the clamp 500; in addition, guide rails 1600 arranged along the sliding direction of the clamp 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 parts. In this way, the sliding part that can be movably inserted into the base 400 can be slidably matched with the guide rails 1600, so that the clamp 500 can stably move along the guide rails 1600.

[0032] In practical applications, when the weight is loaded, the eccentric wheel 600 needs to be separated from the outer periphery of the clamp 500. In this embodiment, a spring structure 1700 arranged along the sliding direction of the clamp 500 is provided on the guide rail 1600. The spring structure 1700 is connected to a corresponding sliding part. In this way, when the eccentric wheel 600 rotates to separate the clamping surface of the clamp 500 from the outer periphery of the connecting column 300, the spring structure 1700 pulls the clamp 500 to move away from the matching hole 110. Ensure that the weight rack 200 is quickly in a completely free state 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 loading process of the weights, the two clamps can rotate the eccentric wheel to make the clamping surface and 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 weights are 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. When moving, the swing rod applies torque to the corresponding eccentric wheel, so that the eccentric wheels move in the same direction at the same time, 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, resulting in technical problems such as 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 aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate 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 specification of the present invention.

Claims

1. 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) capable of clearance fitting with the connecting column (300) is provided at one end of the weight loading platform (100); characterized in that: The anti-sway mechanism also includes a pedestal (400) and a pair of clamping pliers (500), wherein the pedestal (400) is fixed below the weight loading platform (100), a clamping hole directly opposite to the matching hole (110) is provided on the pedestal (400), 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 the eccentric wheel (600) can be rotated to make the clamping pliers (500) move closer to or farther away from the clamping hole. The base (400) is provided with a sliding block (700), and swing rods (800) are hinged at both ends of the sliding block (700). The ends of the swing rods (800) are fixedly connected to the 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 simultaneously, so that the clamping surfaces of the two clamps (500) are in close contact or separation with the periphery of the connecting column (300) at the same time.

2. The weight anti-swing 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-swing device of the torque standard device according to claim 2, characterized in that: The invention also comprises a clamping controller (1200) connected to the servo motor assembly (900) by signal, wherein the clamping controller (1200) is connected to the pressure sensor (1300) provided on the weight loading platform (100) by signal, and 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-swing 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 with the driving rod (1000).

5. The weight anti-swing 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-swing device of the torque standard device according to claim 1, characterized in that: The outer periphery of the eccentric wheel (600) is sleeved with a circumferentially rotatable abutment sleeve (1500), and the abutment sleeve (1500) can roll with a contact surface arranged on the outer side of the clamp (500).

7. The weight anti-swing 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-swing 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 inserted into 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 clamp (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 clamp (500) from the outer periphery of the connecting column (300), the spring structure (1700) pulls the clamp (500) to move away from the matching hole (110).

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