CN204043834U - A kind of high precision torque detecting apparatus - Google Patents

Abstract

The utility model relates to a high-precision torque detection device, which comprises a worktable, a guide rail seat, a weight fixing mechanism and a torque output mechanism. The guide rail seat is fixedly arranged on the workbench, and the weight fixing mechanism includes two The first fixed unit and the second fixed unit on the end face, the first fixed unit is fixedly installed on the worktable on either side of the guide rail seat in the length direction and there is a gap between the guide rail seat, and the second fixed unit is slidably arranged on the guide rail seat and slide back and forth along the length direction of the guide rail seat, and the torque output mechanism is arranged under the first fixing unit. In the utility model, the first fixing unit and the second fixing unit fix the two end faces of the product to be tested to ensure the stability of the fixation and the accuracy of the measurement. The second fixing unit and the first fixing unit can be adjusted according to the length of the product to be tested. The distance between the fixed units is suitable for measuring products of different sizes. The torque output mechanism is used to provide torque to the product under test, so as to measure the torque.

Description

A high-precision torque detection device

technical field

The utility model belongs to the technical field of torque detection machinery, in particular relates to a high-precision torque detection device.

Background technique

With the progress of society and the development of science and technology, people have higher and higher requirements for the safety performance of the items used in life. In order to ensure the safety of equipment operators, various industries have produced a variety of devices to test the safety of products.

In today's industrial equipment, many equipment products, especially large-scale equipment and key parts of equipment, are connected by bolts and nuts for future repair and maintenance. For example: thermal power equipment, hydropower equipment, nuclear power equipment, wind turbine equipment, metallurgical equipment, mining equipment, shipbuilding equipment, petroleum and petrochemical equipment, etc. have tens of thousands of large bolts for the connection of their key components, These bolts need to be tightened and loosened with a hydraulic torque wrench, pneumatic torque wrench, electric torque wrench, manual torque wrench or torque multiplier that can output rated torque according to the design process requirements, so as to ensure the pre-tightening force of each connecting bolt Try to be the same as possible to ensure that the equipment components are effectively, safely and reliably connected. However, the torque setting of these torque tools or equipment is calculated theoretically by the manufacturer or calibrated by a foreign torque sensor. After being used in China for a period of time, it cannot be re-calibrated in China, resulting in failure of many key equipment in China. Torque connection failure of component bolted connections. In severe cases, it will cause leakage and explosion of chemical plants, leakage and pollution of oil depots, collapse of wind turbines and other accidents. The calibration and detection of the real torque of its torque tools or equipment has not been a stable and reliable torque detection device in China.

Therefore, there is an urgent need for a high-precision torque detection device.

Utility model content

The purpose of the utility model is to overcome the defects of the prior art and provide a high-precision torque detection device.

The technical solution for realizing the purpose of the utility model is: a high-precision torque detection device, including a workbench, a guide rail seat, a weight fixing mechanism and a torque output mechanism, the guide rail seat is fixedly arranged on the workbench, and the weight The code fixing mechanism includes a first fixing unit and a second fixing unit for fixing the two end faces of the tested product, and the first fixing unit is fixedly arranged on the workbench on either side of the length direction of the guide rail seat and There is a gap between the guide rail seat, the second fixing unit is slidably arranged on the guide rail seat and slides back and forth along the length direction of the guide rail seat, and the torque output mechanism is arranged under the first fixing unit .

Further, the guide rail seat is provided with a ball screw along the length direction, the guide rail seat is located on both sides of the ball screw along the length direction, and linear guide rails are provided along the length direction, and the ball screw is connected with a Turning motor.

Further, the second fixing unit includes a slider, a second fixing frame and a second fixing shaft for fixing the end face of the product under test, the second fixing shaft is arranged on the second fixing frame, and the first The two fixing frames are arranged on the slider, and the slider is slidably arranged on the ball screw.

Further, balls are arranged on the circumferential surface of the shaft hole of the slider for reducing the frictional force between the slider and the ball screw.

Further, the first fixing unit includes a first fixing frame and a first fixing shaft, the first fixing frame is fixedly arranged on the workbench, and the first fixing shaft is arranged on the first fixing frame .

Further, it also includes an air bearing arranged on the first fixed frame, and the first fixed shaft is arranged on the air bearing.

Further, the coaxiality between the first fixed shaft and the second fixed shaft is not greater than 0.01 mm, and the straightness of the linear guide is not greater than 0.01 mm.

Further, the torque output mechanism includes a link mechanism for providing a force arm and a weight mechanism for providing force, the link mechanism is arranged on the first fixed frame, and the two ends of the link mechanism A weight hook is arranged symmetrically, and a connecting rod shaft hole is arranged at the center of the linkage mechanism. The axis center of the connecting rod shaft hole is on the same line as the axis center of the first fixed shaft. Weight mechanisms are respectively provided.

Further, the weight mechanism includes at least one weight group and a weight bracket for placing the weight group, and the weight bracket is also provided with a weight fixing mechanism for fixing the weight group.

Further, it also includes a cylinder for driving the weight set to move, the weight bracket is provided with a weight placement chamber for placing the weight set, and the weight placement chamber passes through the weight set from top to bottom. The weight bracket, the cylinder is arranged under the weight bracket.

The utility model has positive effects: in the utility model, the first fixing unit and the second fixing unit fix the two end faces of the product to be tested to ensure the stability of the product fixing, thereby ensuring the accuracy of the measurement, and the second fixing unit is slidably set On the guide rail seat, the distance between the second fixed unit and the first fixed unit can be adjusted according to the length of the product under test. It is suitable for measuring products of different sizes. The torque output mechanism is used to provide torque for the product under test, thereby measuring The torque size of the tested product.

Description of drawings

In order to make the content of the utility model easier to understand clearly, the utility model will be further described in detail according to specific embodiments below in conjunction with the accompanying drawings, wherein:

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the structural representation of the weight fixing mechanism of the utility model;

Fig. 3 is a schematic structural view of a second fixing unit of the present invention;

Fig. 4 is a structural schematic diagram of the guide rail seat of the present invention.

Among them: 1. The first fixed frame, 2. The first fixed shaft, 3. The second fixed shaft, 4. The second fixed frame, 5. Slider, 6. Reducer, 7. Motor, 8. Rail seat, 9 , workbench, 10, ball screw, 11, linear guide rail, 12, air bearing, 13, connecting rod mechanism, 14, weight hook, 15, weight group, 16, weight fixing mechanism, 17, weight stand.

Detailed ways

Example 1

As shown in Figures 1 to 2, the first embodiment of the utility model provides a high-precision torque detection device, including a workbench 9, a guide rail seat 8, a weight fixing mechanism and a torque output mechanism, and the guide rail seat 8 is fixedly arranged on the working On the platform 9, the weight fixing mechanism includes a first fixing unit and a second fixing unit for fixing the two end faces of the product under test. There is a space between the guide rail base 8, the second fixing unit is slidably arranged on the guide rail base 8 and slides back and forth along the length direction of the guide rail base 8, and the torque output mechanism is arranged under the first fixing unit.

In this embodiment, the first fixing unit and the second fixing unit fix the two end faces of the product to be tested to ensure the stability of the product, thereby ensuring the accuracy of the measurement. The second fixing unit is slidably arranged on the guide rail seat 8, which can The length of the product under test adjusts the distance between the second fixed unit and the first fixed unit, which is suitable for measuring products of different sizes. The torque output mechanism is used to provide torque to the product under test, so as to measure the torque of the product under test .

Example 2

As shown in Figures 3 to 4, as a second preferred embodiment, the rest is the same as Embodiment 1, except that the second fixing unit provided by this embodiment includes a slider 5, a second fixing frame 4 and a Fix the second fixed shaft 3 on the end face of the product under test, the second fixed shaft 3 is arranged on the second fixed frame 4, the second fixed frame 4 is arranged on the slider 5, and the slider 5 is slidably arranged on the ball screw 10, The second fixed shaft 3 is connected with a motor 7 for driving the second fixed shaft 3 to rotate, and a speed reducer 6 is also arranged between the motor 7 and the second fixed shaft 3 .

The first fixing unit provided in this embodiment includes a first fixing frame 1, a first fixing shaft 2 and an air bearing 12 arranged on the first fixing frame 1. The first fixing frame 1 is fixedly arranged on the workbench 9. A fixed shaft 2 is arranged on the air bearing.

The torque output mechanism provided in this embodiment includes a link mechanism 13 for providing a moment arm and a weight mechanism for providing force, the link mechanism 13 is arranged on the first fixed frame 1, and the two ends of the link mechanism 13 are arranged symmetrically There is a weight hook 14, the center of the connecting rod mechanism 13 is provided with a connecting rod shaft hole, the axis of the connecting rod shaft hole is on the same straight line as the axis of the first fixed shaft 2, and a weight mechanism is respectively arranged under the weight hook 14 The weight mechanism includes four weight groups 15 and a weight bracket 17 for placing the weight group 15, and the weight bracket 17 is also provided with a weight fixing mechanism 16 for fixing the weight group 15; the weight group 15 It is also connected with a cylinder for driving the weight group 15 to move. The weight bracket 17 is provided with a weight placement chamber for placing the weight group 15. The weight placement chamber runs through the weight bracket 17 from top to bottom. Cylinder is arranged on weight support 17 belows.

The guide rail seat 8 provided in this embodiment is provided with a ball screw 10 along the length direction, and the guide rail seat 8 is provided with linear guide rails 11 along the length direction on both sides of the ball screw 10, and the ball screw 10 is used to drive the ball screw 10. The rotating motor 7 is connected, and the circumferential surface of the shaft hole of the slider 5 is provided with balls (not shown) for reducing the friction force between the slider 5 and the ball screw 10, the first fixed shaft 2 and the second fixed shaft The coaxiality of the shaft 3 is not greater than 0.01mm, and the straightness of the linear guide rail 11 is not greater than 0.01mm.

The working principle of this embodiment is further described below: according to the size of the product to be tested, the starting motor 7 drives the ball screw 10 to rotate, and the ball screw 10 drives the slider 5 to slide on the linear guide rail 11, thereby adjusting the first fixed shaft 2 The distance between the second fixed shaft 3 and the product to be tested are placed between the first fixed shaft 2 and the second fixed shaft 3, and the weight group 15 is hung on the weight hook 14 through the link mechanism 13 Apply torque to the tested product to measure the torque of the tested product; the tested product needs to rotate during the test, and the air bearing drives the first fixed shaft 2 to rotate. Due to the friction between the air bearing and the first fixed shaft 2 The force is small, which reduces the impact on the test; on the other hand, the motor 7 drives the reducer 6 to drive the second fixed shaft 3 to rotate, which can ensure the left and right balance of the product under test.

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present utility model in detail. It should be understood that the above descriptions are only specific embodiments of the present utility model and are not intended to limit the present invention. For the utility model, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims (10)

1. a high precision torque detecting apparatus, it is characterized in that, comprise worktable, track base, counterweight fixed mechanism and moment of torsion output mechanism, described track base is fixedly installed on described worktable, described counterweight fixed mechanism comprises the first fixed cell for fixing test product two end faces and the second fixed cell, described first fixed cell is fixedly installed on described worktable and also and between described track base is provided with interval at the either side of described track base length direction, described second fixed cell slides and is arranged on described track base and slidably reciprocates along described track base length direction, described moment of torsion output mechanism is arranged at below described first fixed cell.

2. high precision torque detecting apparatus according to claim 1, it is characterized in that, described track base is provided with ball-screw along its length, described track base being positioned at described ball-screw both sides and being provided with line slideway along its length, ball-screw being connected with the motor for driving described ball screw turns.

3. high precision torque detecting apparatus according to claim 2, it is characterized in that, described second fixed cell comprises slide block, the second fixed mount and the second stationary shaft for fixing test product end face, described second stationary shaft is arranged on described second fixed mount, described second fixed mount is arranged on described slide block, and described skid is arranged on described ball-screw.

4. high precision torque detecting apparatus according to claim 3, is characterized in that, described slide block axis hole periphery is provided with the ball for reducing friction force between described slide block and described ball-screw.

5. high precision torque detecting apparatus according to claim 4, it is characterized in that, described first fixed cell comprises the first fixed mount and the first stationary shaft, and described first fixed mount is fixedly installed on described worktable, and described first stationary shaft is arranged on described first fixed mount.

6. high precision torque detecting apparatus according to claim 5, is characterized in that, also comprises the air-bearing be arranged on described first fixed mount, and described first stationary shaft is arranged on described air-bearing.

7. high precision torque detecting apparatus according to claim 6, is characterized in that, the right alignment of described first stationary shaft and described second stationary shaft is not more than 0.01mm, and the linearity of described line slideway is not more than 0.01mm.

8. high precision torque detecting apparatus according to claim 7, it is characterized in that, described moment of torsion output mechanism comprises for providing the linkage assembly of the arm of force and for providing the counterweight mechanism of power, described linkage assembly is arranged on described first fixed mount, described linkage assembly two ends are symmetrically arranged with counterweight hook, described linkage assembly center is provided with connecting rod axis hole, the axle center of described connecting rod axis hole and the axle center of described first stationary shaft on the same line, are respectively arranged with counterweight mechanism below described counterweight hook.

9. high precision torque detecting apparatus according to claim 8, it is characterized in that, described counterweight mechanism comprises at least one weight group and the weight brackets for placing weight group, described weight brackets is also provided with the counterweight fixed mechanism for fixing weight group.

10. high precision torque detecting apparatus according to claim 9, it is characterized in that, also comprise the cylinder for driving the action of described weight group, chamber placed by the counterweight described weight brackets is provided with for placing weight group, the from top to bottom through described weight brackets of chamber placed by described counterweight, and described cylinder is arranged at below described weight brackets.