A device and method for center-to-center torsion spring torque measurement

Abstract

The present application relates to a kind of device and method for center distance torsion spring torque measurement, wherein the torsion spring includes body, first torsion arm and second torsion arm;The device includes cylinder, cylinder cover and core column assembly;The cylinder includes first end and second end, and accommodating cavity is formed in the cylinder, and the accommodating cavity is used to accommodate the torsion spring;The cylinder cover is arranged at the first end;The core column assembly includes core column and support, and the core column is arranged on the support, and the body can be sleeved on the outside of the core column and make the second torsion arm arranged on the support.The measurement method of center distance torsion spring torque of an embodiment of the present application is simple to operate, improves the force accuracy of torsion spring, and solves the problem of low force accuracy.

Description

TECHNICAL FIELD

[0001] The present application relates to torsion springs, and in particular to a device and a method for measuring the torque of a center distance torsion spring. BACKGROUND

[0002] Torsion springs belong to the category of helical springs, the ends of which are fixed to other components, and when the other components rotate around the center of the spring, the spring pulls them back to the original position, generating torque or rotational force. With the development of related products, torsion spring parts are increasingly widely used, and the requirements for torsion springs are becoming higher and higher. As an ejection structure component, whether the torque of the torsion spring is qualified or not is related to the success or failure of product experiments. In the heat treatment production of torsion bars, the straightness of the torsion bar is usually an important indicator for the acceptance of the torsion bar.

[0003] At present, the force measurement accuracy of torsion spring products is low, which not only affects the delivery of production, but also causes a large amount of repair work, thereby increasing production costs and reducing production efficiency. SUMMARY

[0004] To overcome at least one of the above-mentioned defects of the prior art, in a first aspect, an embodiment of the present application provides a device for measuring the torque of a center distance torsion spring, wherein the torsion spring comprises a body, a first torsion arm and a second torsion arm; the device comprises a barrel, a barrel cover and a core column assembly; the barrel comprises a first end and a second end, and a containing cavity is formed in the barrel, the first end and the second end are located at two ends of the containing cavity respectively; the containing cavity is used for containing the torsion spring; the barrel cover is arranged on the first end, and the first torsion arm can be arranged on the barrel cover; the core column assembly comprises a core column and a support, the core column is arranged on the support, and the body can be sleeved outside the core column and the second torsion arm is arranged on the support.

[0005] According to an embodiment of the present application, the barrel is a cylinder, the inner diameter of the cross section of the cylinder is greater than the cross-sectional size of the body of the torsion spring, and the body can be movably arranged in the barrel.

[0006] According to an embodiment of the present application, one or more observation holes are arranged on the barrel; and / or

[0007] A first torsion arm hole is arranged on the barrel cover, the first torsion arm hole is in communication with the containing cavity, and the first torsion arm hole is used for containing the first torsion arm.

[0008] According to an embodiment of the present application, the angle between the depth direction of the first torsion arm hole and the axis direction of the barrel is 0-5°.

[0009] According to an embodiment of the present application, a cylinder is arranged on the barrel cover, and the cylinder is arranged outside the barrel body.

[0010] A second torsion arm hole is arranged on the support, and the body is arranged outside the core column, and the second torsion arm hole is used for accommodating the second torsion arm.

[0011] According to an embodiment of the present application, a sleeve is arranged outside the cylinder, and a thread is arranged on the sleeve.

[0012] According to an embodiment of the present application, an angle between a depth direction of the second torsion arm hole and an axis direction of the core column is 0-5°.

[0013] In a second aspect, an embodiment of the present application provides a measurement method of a center distance torsion spring torque, comprising the following steps:

[0014] S1: arranging the torsion spring on the device;

[0015] S2: measuring the torque of the torsion spring arranged on the device by the torque dynamometer.

[0016] According to an embodiment of the present application, the step S1 comprises: arranging the core column on the support, arranging the body of the torsion spring outside the core column, and arranging the body in the accommodating cavity of the barrel body, arranging the first torsion arm in the first torsion arm hole, and arranging the second torsion arm in the second torsion arm hole.

[0017] According to an embodiment of the present application, one or more observation holes are arranged on the barrel body, and the state of the torsion spring in the barrel body is observed through the observation holes.

[0018] The measurement method of the center distance torsion spring torque according to an embodiment of the present application is simple to operate, improves the force measurement accuracy of the torsion spring, and solves the problem of low force measurement accuracy.

[0019] In the present application, each of the above technical solutions can be combined with each other to realize more preferred combination schemes. Other features and advantages of the present application will be described in the subsequent description, and some advantages will become apparent from the description, or will be understood by implementing the present application. The purposes and other advantages of the present application can be realized and obtained from the contents particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings are only for the purpose of illustrating specific embodiments, and are not considered as limiting the present application.

[0021] Wherein:

[0022] Figure 1 Structure diagram of a center distance torsion spring according to an embodiment of the present application;

[0023] Figure 2 Structure diagram of a completed device for measuring torque of a center distance torsion spring according to an embodiment of the present application;

[0024] Figure 3 Front view of a completed device for measuring torque of a center distance torsion spring according to an embodiment of the present application;

[0025] Figure 4 Structure diagram of a cylinder and a cylinder cover according to an embodiment of the present application;

[0026] Figure 5 Front view of a cylinder and a cylinder cover according to an embodiment of the present application;

[0027] Figure 6 Left view of a cylinder and a cylinder cover according to an embodiment of the present application;

[0028] Figure 7 Structure diagram of a core column according to an embodiment of the present application;

[0029] Figure 8 Structure diagram of a center distance torsion spring arranged on a core column and a support according to an embodiment of the present application;

[0030] Figure 9 Front view of a center distance torsion spring arranged on a core column and a support according to an embodiment of the present application;

[0031] Figure 10 Structure diagram of a support according to an embodiment of the present application;

[0032] Figure 11 Front view of a support according to an embodiment of the present application;

[0033] Figure 12 Left view of a support according to an embodiment of the present application;

[0034] The following is a list of reference numerals:

[0035] 11, body; 12, first torsion arm; 13, second torsion arm; 20, cylinder; 21, accommodating cavity; 22, observation hole; 30, cylinder cover; 31, first torsion arm hole; 32, cylindrical body; 33, first end face; 33a, first groove; 34, second end face; 40, core column; 41, body part; 42, end part; 50, support; 51, second torsion arm hole; 52, first hole; 53, connecting part; 53a, third end face; 53b, fourth end face; 54, mounting part; 55, second groove. DETAILED DESCRIPTION

[0036] The preferred embodiments of the present application are described in detail below, in which the accompanying drawings constitute a part of the present application and are used to illustrate the principles of the present application together with the embodiments of the present application, but are not used to limit the scope of the present application. The cross section refers to the cross section perpendicular to the axial direction.

[0037] Referring to Figures 1 to 12 As shown in the drawings, an embodiment of the present application provides a device for center distance torsion spring torque measurement, which comprises a barrel 20, a barrel cover 30 and a core column assembly; wherein the device is used to measure the torque of the torsion spring by setting the torsion spring on the device and then setting the device on a torque dynamometer. The barrel 20 is used to simulate the actual application environment of the torsion spring, and the internal structure and size of the barrel 20 can be the same as the corresponding application scene.

[0038] In an embodiment, the torque dynamometer can be an existing device, which can be used to measure the torque of the center distance torsion spring.

[0039] In an embodiment, the torsion spring is a center distance torsion spring, which comprises a body 11, a first torsion arm 12 and a second torsion arm 13. The first torsion arm 12 and the second torsion arm 13 are located at the two ends of the body 11, and the angle between the length direction of the first torsion arm 12 and the second torsion arm 13 and the axial direction of the body 11 is 0-5°.

[0040] In an embodiment, the angle between the length direction of the first torsion arm 12 and the second torsion arm 13 and the axial direction of the body 11 can be 0.1°, 0.2°, 0.3°, 0.5°, 0.6°, 0.8°, 1°, 2°, 3° or 4°; further, the length direction of the first torsion arm 12 and the second torsion arm 13 is the same as the axial direction of the body 11.

[0041] In an embodiment, the barrel 20 comprises a first end and a second end, and a receiving cavity 21 is formed in the barrel 20. Along the axial direction of the barrel 20, the first end and the second end are located at the two ends of the receiving cavity 21 respectively, and the receiving cavity 21 is used to accommodate the torsion spring.

[0042] In an embodiment, the barrel 20 is a cylinder, and the inner diameter of the cylinder is greater than the cross-sectional dimension of the body 11 of the torsion spring, so that the torsion spring can be movably arranged in the barrel 20.

[0043] In an embodiment, one or more observation holes 22 are formed on the barrel wall of the barrel 20, and a plurality of observation holes 22 can be arranged around the barrel 20, so as to facilitate the observation of the state of the torsion spring located in the barrel 20 during the measurement process. The observation hole 22 is a through hole.

[0044] In one embodiment, a cap 30 is disposed at the first end of the cylinder 20 and can be integrally formed with the cylinder 20, while the second end of the cylinder 20 is in an open state. The axis of the cap 30 can be located on the same straight line as the axis of the cylinder 20.

[0045] In one embodiment, a first torsion arm hole 31 is provided on the cylinder cover 30. The first torsion arm hole 31 is connected to the receiving cavity 21 and is used to receive the first torsion arm 12 of the torsion spring. The first torsion arm 12 can be fixed in the first torsion arm hole 31, that is, it will not move or rotate relative to the first torsion arm hole 31.

[0046] In one embodiment, a cylinder 32 for connection to a torque measuring instrument is provided on the cylinder cover 30. The cylinder 32 is disposed outside the cylinder 20, and further, the axial direction of the cylinder 32 is the same as the axial direction of the cylinder 20. A thread is provided on the cylinder 32 to connect with a threaded hole on the torque measuring instrument. Further, a sleeve is provided outside the cylinder 32, and a thread is provided on the outer surface of the sleeve. The sleeve and the cylinder 32 are tightly fitted, and the cylinder 32 is disposed in the threaded hole of the torque measuring instrument through the sleeve.

[0047] In one embodiment, the first torsion arm hole 31 can be a through hole, and the angle between the depth direction of the first torsion arm hole 31 and the axial direction of the cylinder 20 is 0 to 5°, for example, 0.1°, 0.2°, 0.3°, 0.5°, 0.6°, 0.8°, 1°, 2°, 3° or 4°; furthermore, the depth direction of the first torsion arm hole 31 is the same as the axial direction of the cylinder 30.

[0048] In one embodiment, when performing a measurement, the cap 30 can be placed on a torque measuring instrument, thereby matching the shape of the cap 30 with the shape of the corresponding component on the torque measuring instrument.

[0049] In one embodiment, reference is made to Figure 2 , 6 As shown, the cap 30 includes a first end face 33 and a second end face 34. Along the axial direction of the cylinder 20, the first end face 33 and the second end face 34 are located at both ends of the cap 30. Further, both the first end face 33 and the second end face 34 are perpendicular to the axial direction of the cylinder 20. The first end face 33 may be disposed at the first end of the cylinder 20. Further, the shape of the first end face 33 matches the opening shape of the first end of the cylinder 20, and the first torsion arm hole 31 may be disposed on the first end face 33.

[0050] In one embodiment, a first groove 33a is provided on the first end face 33 to match the shape of the corresponding component on the torque measuring instrument.

[0051] In one embodiment, the first end surface 33 has a larger area than the second end surface 34, and further, the projection of the second end surface 34 is located within the projection of the first end surface 33 along the axial direction of the barrel 20. The first end surface 33 can be circular, and the second end surface 34 can be substantially rectangular with two short sides being arc-shaped and two long sides being composed of line segments and arc-shaped lines.

[0052] In one embodiment, the cover 30 includes a main body structure between the first end surface 33 and the second end surface 34, and the main body structure and the second end surface 34 can be located outside the barrel 20. The main body structure has a smaller lateral dimension than the first end surface 33, and further, the projection of the first torsion arm hole 31 is located outside the projection of the main body structure along the axial direction of the barrel 20, so that the first torsion arm hole 31 can be exposed. The cross section of the main body structure of the cover 30 can have the same shape as the second end surface 34, and further, the projection of the main body structure of the cover 30 coincides with the projection of the second end surface 34 along the axial direction of the barrel 20.

[0053] In one embodiment, the core column assembly includes a core column 40 and a support 50, and the core column 40 is arranged on the support 50, and the second torsion arm hole 51 is arranged on the support 50. The body 11 of the torsion spring can be sleeved on the core column 40, and the second torsion arm hole 51 is used to accommodate the second torsion arm 13. The second torsion arm 13 can be fixed in the second torsion arm hole 51, that is, it cannot move or rotate relative to the second torsion arm hole 51.

[0054] In one embodiment, the core column 40 can be a cylinder, one end of which is arranged on the support 50, and the other end is arranged in a suspended manner. Further, the axial direction of the core column 40 is the same as the axial direction of the support 50.

[0055] In one embodiment, the core column 40 includes a body part 41 and an end part 42, and the core column 40 is arranged on the support 50 through the end part 42, and the cross-sectional dimension of the end part 42 is smaller than the cross-sectional dimension of the core column 40. Further, the body part 41 and the end part 42 are both cylinders, and the diameter of the body part 41 can be 0.8 times the inner diameter of the torsion spring body 11. Further, the core column 40 can be a shaft.

[0056] In one embodiment, a first hole 52 for arranging the core column 40 is arranged on the support 50, and the end part 42 of the core column 40 is arranged in the first hole 52. Further, the axial direction of the first hole 52 is the same as the axial direction of the core column 40 and the axial direction of the support 50. Further, the axial line of the first hole 52 is on the same straight line as the axial direction of the core column 40 and the axial direction of the support 50.

[0057] In an embodiment, the angle between the depth direction (or axis direction) of the second torsion arm hole 51 and the axis direction of the core column 40 is 0-5°, for example, 0.1°, 0.2°, 0.3°, 0.5°, 0.6°, 0.8°, 1°, 2°, 3° or 4°. The second torsion arm hole 51 can be a through hole, which can be arranged parallel to the first hole 52; further, the axis direction of the second torsion arm hole 51 is the same as the axis direction of the core column 40 and the axis direction of the support 50.

[0058] In an embodiment, the support 50 comprises a connecting portion 53 and a mounting portion 54, the connecting portion 53 is used to arrange the core column 40 on the support 50, and the mounting portion 54 is used to arrange the support 50 on the torque measuring instrument. Further, after the device is assembled, the connecting portion 53 is located between the barrel 20 and the mounting portion 54.

[0059] In an embodiment, the connecting portion 53 can be cylindrical, the second torsion arm hole 51 and the first hole 52 are arranged on the connecting portion 53, and further, the first hole 52 has the same axis as the connecting portion 53.

[0060] In an embodiment, the connecting portion 53 can comprise a third end face 53a and a fourth end face 53b arranged opposite along the axis direction thereof, the first hole 52 is arranged on the third end face 53a, and the mounting portion 54 is connected to the connecting portion 53 through the fourth end face 53b. Further, a second groove 55 is arranged on the fourth end face 53b, the shape and position of the second groove 55 on the end face can be the same as the first groove 33a, and the second groove 55 is used to cooperate with the corresponding component on the torque measuring instrument.

[0061] In an embodiment, the structure of the mounting portion 54 can be the same as the shape of the main structure of the barrel cover 30, and both match the shape of the corresponding component on the torque measuring instrument.

[0062] The device for measuring the torque of a center distance torsion spring in an embodiment of the present application, after the torsion spring is assembled, the body 11 of the torsion spring is sleeved outside the core column 40, the first torsion arm 12 is fixed in the first torsion arm hole 31 of the barrel cover 30, the second torsion arm 13 is fixed in the second torsion arm hole 51 of the support 50, and the support 50 is not connected between the barrel 20, under the action of the torque measuring instrument, the support 50 can drive the core column 40 to rotate along the axis of the body 11.

[0063] In an embodiment, when measuring, the barrel cover 30 and the support 50 are arranged in the groove of the torque measuring instrument, and the shapes of the barrel cover 30 and the support 50 match the shape of the groove of the torque measuring instrument.

[0064] The center distance torsion spring of the embodiment of the present application can be used in an airplane wing, but after the torsion spring is installed in the application position, the torque measurement of the torsion spring cannot be performed, so that the force measurement accuracy of the torsion spring is low. The torsion spring is arranged on the specific device in the embodiment of the present application, the internal structure and size of the barrel 20 are adjusted to be the same as the actual application environment of the torsion spring to simulate the stress condition of the torsion spring, the shapes of the first torsion arm 12 and the second torsion arm 13 of the torsion spring are the same as the state in the application, so that the accurate measurement of the torsion torque of the torsion spring before installation can be realized, and if the measured torque does not meet the standard, the spring torque can be adjusted by adjusting the outer diameter, height and the like, so that the force measurement accuracy of the torsion spring is improved.

[0065] The embodiment of the present application provides a measurement method of the torque of a center distance torsion spring, which comprises the following steps:

[0066] S1: arranging the torsion spring on the device;

[0067] S2: measuring the torque of the torsion spring arranged on the device by a torque force gauge.

[0068] In an embodiment, the device is arranged on the torque force gauge by the cylinder 32, the barrel cover 30 and the support 50 to measure the torque of the torsion spring.

[0069] In an embodiment, the step S1 comprises:

[0070] arranging the core column 40 in the first hole 52 of the support 50;

[0071] sleeving the body 11 of the torsion spring outside the core column 40, and inserting the second torsion arm 13 into the second torsion arm hole 51 of the support 50;

[0072] arranging the support 50 in the barrel 20 through the second end of the barrel 20, arranging the core column 40 sleeved with the torsion spring in the accommodating cavity 21 of the barrel 20, inserting the first torsion arm 12 into the first torsion arm hole 31 of the barrel cover 30, and arranging part of the structure of the support 50 in the barrel 20 and part of the structure outside the barrel 20; and

[0073] sleeving the sleeve with threads outside the cylinder 32;

[0074] The length of the first torsion arm 12 and the second torsion arm 13 is parallel to the axis direction of the body 11.

[0075] In an embodiment, the step S2 comprises: arranging the cylinder 32 with the sleeve in the screw hole of the torque force gauge, clamping the second end of the barrel 20 and the support 50 in the groove of the torque force gauge, and then performing the force measurement.

[0076] In an embodiment, during the measurement, when the torsion spring is at the working angle of 154°, the torque theoretical value M1 is 5186.72 N·mm, and according to the standard accuracy (QJ1787-89 II class secondary accuracy) requirement, the qualified range of the torque is 4422.7-5950.7 N·mm; when the torsion spring is at the maximum working angle of 280°, the torque theoretical value M2 is 9430.40 N·mm, and according to the standard accuracy requirement, the qualified range of the torque is 8454.4-10406.4 N·mm; when the torsion spring is at the limit angle of 350.14°, the torque theoretical value M3 is 11792.84 N·mm, and according to the standard accuracy requirement, the qualified range of the torque is 10698.9-12886.8 N·mm.

[0077] The method of the embodiment of the application can accurately test the force value of the center distance torsion spring at the corresponding torsion angle according to the force measurement of the center distance torsion spring in the working environment, and solves the problem of low accuracy of the torsion spring force measurement.

[0078] Hereinafter, the method for measuring the torque of the center distance torsion spring of the embodiment of the application will be further described in combination with the drawings and specific embodiments.

[0079] Embodiment

[0080] The material grade of the used center distance torsion spring is 70 steel, C grade, the wire diameter d is 4.5 mm, the medium diameter D is 36 (+0.5, -0.5) mm, the effective number of turns n is 19 turns, and the pitch t is approximately 5. The torsion spring includes a body 11, a first torsion arm 12 and a second torsion arm 13, the first torsion arm 12 and the second torsion arm 13 are located at two ends of the body 11, and the length direction of the first torsion arm 12 and the second torsion arm 13 is the same as the axis direction of the body 11.

[0081] The device for measuring the torque of the torsion spring includes a cylinder body 20, a cylinder cover 30 and a core column assembly; the cylinder body 20 is a cylinder and includes a first end and a second end, and a containing cavity 21 is formed in the cylinder body 20, and the first end and the second end are located at two ends of the containing cavity 21, respectively.

[0082] The cylinder cover 30 is arranged at the first end of the cylinder body 20, a first torsion arm hole 31 which is in communication with the containing cavity 21 is arranged on the cylinder cover 30, and the axis direction of the first torsion arm hole 31 is the same as the axis direction of the containing cavity 21; a cylindrical body 32 is arranged on the cylinder cover 30, the cylindrical body 32 is located outside the cylinder body 20, and the axis direction of the cylindrical body 32 is the same as the axis direction of the cylinder body 20.

[0083] The core column assembly comprises the core column 40 and the support 50, the diameter of the core column 40 is 0.8 times of the inner diameter of the torsion spring body 11, the core column 40 comprises the body part 41 and the end part 42; the first hole 52 and the second torsion arm hole 51 are arranged on the support 50, the end part 42 of the core column 40 is arranged in the first hole 52; the axis of the first hole 52 is in the same line with the axis direction of the core column 40 and the axis of the support 50, the axis direction of the second torsion arm hole 51 is the same with the axis direction of the core column 40 and the axis direction of the support 50.

[0084] The measurement process of the torque of the torsion spring comprises:

[0085] S1: the core column 40 is arranged on the support 50, the body 11 of the torsion spring is sleeved on the outside of the core column 40, the second torsion arm 13 is inserted into the second torsion arm hole 51 of the support 50; the support 50 is inserted into the cylinder 20 through the second end part, the core column 40 sleeved with the torsion spring is arranged in the accommodating cavity 21 of the cylinder 20, the first torsion arm 12 is inserted into the first torsion arm hole 31 of the cylinder cover 30; the second torsion arm 13 is inserted into the second torsion arm hole 51 of the support 50, part of the structure of the support 50 is located in the cylinder 20, and part of the structure is located outside the cylinder 20; the sleeve with threads is sleeved on the outside of the cylinder 32.

[0086] S2: the cylinder 32 with the sleeve is arranged in the screw hole of the torque measuring instrument, and the second end part of the cylinder 20 and the support 50 are clamped into the groove of the torque measuring instrument.

[0087] S3: when the torsion spring is twisted to 154°, the measured torque value is 5428 N·mm; when the torsion spring is twisted to 280°, the measured torque value is 8920 N·mm; when the torsion spring is twisted to 350.14°, the measured torque value is 11872 N·mm.

[0088] The measured torque of the torsion spring is within the qualified range, which indicates that the torsion spring meets the standard.

[0089] The above is only the preferred embodiment of the present application, but the protection scope of the present application is not limited to this, any change or replacement within the technical range disclosed by the present application can be easily thought by the person skilled in the art, which should be covered in the protection scope of the present application.

Claims

1. A device for center-to-center torsion spring torque measurement, wherein, The torsion spring comprises a body, a first torsion arm and a second torsion arm; The device comprises: a cylinder body comprising a first end and a second end, an accommodating cavity is formed in the cylinder body, the first end and the second end are located at two ends of the accommodating cavity respectively; the accommodating cavity is used for accommodating the torsion spring; wherein the cylinder body is a cylinder, the inner diameter of the cross section of the cylinder is greater than the cross section size of the body of the torsion spring, and the body can be movably arranged in the cylinder body; a cylinder cover is arranged on the first end, and the first torsion arm can be arranged on the cylinder cover; a first torsion arm hole is arranged on the cylinder cover, the first torsion arm hole is in communication with the accommodating cavity, and the first torsion arm hole is used for accommodating the first torsion arm; a cylindrical body is arranged on the cylinder cover, the cylindrical body is arranged outside the cylinder body, a sleeve is arranged outside the cylindrical body, threads are arranged on the sleeve, and the cylindrical body is arranged in the screw hole of the torque measuring instrument through the sleeve; when measuring, the cylinder cover is arranged on the torque measuring instrument, and the shape of the cylinder cover matches the shape of the corresponding part on the torque measuring instrument; and a core column assembly comprising a core column and a support, the core column is arranged on the support, a second torsion arm hole is arranged on the support; the body can be sleeved outside the core column, the second torsion arm hole is used for accommodating the second torsion arm, and the body can be sleeved outside the core column and make the second torsion arm arranged on the support; the support and the cylinder body are not connected, and under the action of the torque measuring instrument, the support can drive the core column to rotate along the axis of the body; when measuring, the cylinder cover and the support are arranged in the groove of the torque measuring instrument, and the shapes of the cylinder cover and the support match the shape of the groove of the torque measuring instrument.

2. The apparatus of claim 1, wherein, One or more observation holes are arranged on the cylinder body.

3. The apparatus of claim 1, wherein, The angle between the depth direction of the first torsion arm hole and the axis direction of the cylinder body is 0-5°.

4. The apparatus of claim 1, wherein, The angle between the depth direction of the second torsion arm hole and the axis direction of the core column is 0-5°.

5. A method for measuring the torque of a center distance torsion spring, comprising the following steps: S1: arranging the torsion spring on the device according to any one of claims 1 to 4; and S2: measuring the torque of the torsion spring arranged on the device by a torque measuring instrument.

6. The method of claim 5, wherein, The step S1 comprises: arranging the core column on the support, sleeving the body of the torsion spring outside the core column, and arranging the body in the accommodating cavity of the cylinder body, arranging the first torsion arm in the first torsion arm hole, and arranging the second torsion arm in the second torsion arm hole.

7. The method of claim 5, wherein, One or more observation holes are arranged on the cylinder body, and the state of the torsion spring in the cylinder body is observed through the observation holes.

Images