Torsion spring testing device

Abstract

The utility model relates to a torsion spring testing device, the torsion spring testing device comprises: a base assembly comprising a base plate, and an angle unit, a torsion spring shaft and columns which are respectively arranged on the base plate, the torsion spring shaft is fixed at the circle center of the angle unit, the columns are respectively arranged at the left side and the right side of the torsion spring shaft, and the torsion spring shaft is sleeved with a torsion spring sleeve; the rotating assembly comprises a wrench shaft seat arranged on the stand column in a sleeving mode, a bearing installed in a bearing installation hole of the wrench shaft seat, a wrench shaft penetrating through the bearing, the lower end of the wrench shaft is rotatably connected with the upper end of the torsion spring shaft, one end of the pointer is arranged on the wrench shaft in a sleeving mode, and the other end of the pointer is matched with a bevel protractor to indicate angles. Compared with the prior art, the utility model has the advantages of quick release and change, real-time torque test, high accuracy, strong compatibility and the like.

Description

Technical Field

[0001] The utility model relates to a field, in particular to a torsion spring testing device. Background Art

[0002] Torsion springs (torsion springs) are coil springs. The ends of torsion springs are fixed to other components. When other components rotate around the center of the spring, the spring pulls them back to their original position, generating torque or rotational force. Torsion springs can store and release angular energy or statically fix a device by rotating the force arm around the central axis of the spring body. Different usage environments require different torsion spring specifications, so they need to be selected and used according to the rotational force of the torsion spring. Therefore, testing of torsion springs is essential. Testing of torsion springs requires attention to the rated torsion angle and corresponding torque of the torsion spring.

[0003] Existing testing devices test the performance of a torsion spring by assembling it with other parts. However, these devices and methods are unable to individually test the left door torsion spring, making it difficult to detect defective incoming materials in a timely manner. Furthermore, if a component fails the test, it must be disassembled and replaced with a new torsion spring, significantly increasing assembly time and maintenance costs. Furthermore, the testing device is bulky and inconvenient for testing smaller torsion springs.

[0004] Chinese patent CN208999076U discloses a torsion spring testing device, which can be used with a pressure gauge to test the maximum torsion angle and corresponding maximum working torque of a torsion spring. However, the angle is tested by measuring the absolute value of the test to reach the laser scale qualification line. This detection method is not accurate enough, and the test torque is not tested synchronously. After the angle is reached, a pressure gauge needs to be used to push it into the groove of the rocker arm. The force measurement operation is more troublesome and lacks real-time performance. In addition, the device is designed as an integral part of the rocker arm, and it is also more troublesome to install the product and disassemble the torsion spring during use. Utility Model Content

[0005] In order to solve the technical problems in the background technology, the utility model provides a torsion spring testing device for performing torsion testing on outer arm torsion springs of different specifications and models. The torsion spring testing device includes:

[0006] Base assembly: includes a base plate and an angle unit, a torsion spring shaft and a column respectively arranged on the base plate. The torsion spring shaft is fixed at the center of the angle unit. The columns are respectively arranged on the left and right sides of the torsion spring shaft. The torsion spring shaft is provided with a torsion spring sleeve.

[0007] Rotating assembly: includes a wrench shaft seat mounted on the column, a bearing installed in the bearing mounting hole of the wrench shaft seat, a wrench shaft passing through the bearing and rotatably connected to the upper end of the torsion spring shaft at the lower end, and a pointer. One end of the pointer is mounted on the wrench shaft, and the other end cooperates with the angle ruler to indicate the angle.

[0008] Furthermore, the angle unit is an angle ruler installed on the base plate or an angle line engraved on the base plate, and the measuring range of the angle ruler or angle line is 180 degrees.

[0009] Furthermore, the 0-degree line and the 180-degree line of the angle ruler or angle line are parallel to the long bottom side of the base plate, and the 90-degree line is parallel to the short bottom side of the base plate.

[0010] Furthermore, the torsion spring shaft and the column are both stepped shafts, the two columns are equidistant from the torsion spring shaft, and the line connecting the two columns is parallel to the long bottom side of the base plate and is closer to the long bottom side of the base plate than the torsion spring shaft.

[0011] Furthermore, the torsion spring sleeve is a hollow stepped table-shaped sleeve, and its size specification matches the inner diameter of the coil spring to be tested.

[0012] Furthermore, the wrench shaft seat is a T-shaped metal structural part, and column positioning holes for cooperating with corresponding columns are symmetrically opened on both sides of the bearing mounting hole.

[0013] Furthermore, a positioning hole is provided at the lower end of the wrench shaft for rotationally connecting with the upper end of the torsion spring shaft. The upper portion of the wrench shaft is a hexagonal head, and a mounting hole is provided in the middle portion for fixing a mounting pointer.

[0014] Furthermore, the pointer is Z-shaped as a whole, including an L-shaped connector and a needle tip portion connected to each other. The sleeve end of the L-shaped connector is sleeved on the wrench shaft and fixed by a screw in conjunction with the mounting hole. The upper end of the vertical rod of the L-shaped connector is connected to the sleeve end or integrally formed, and the lower end is connected to the needle tip portion. The needle tip portion cooperates with the angle unit to indicate the current rotation angle.

[0015] Furthermore, the device also includes a torque wrench and a sleeve, and the torque wrench is connected to the upper end of the wrench shaft through the sleeve for rotation operation.

[0016] Furthermore, the coil spring sleeve to be tested is arranged on the torsion spring sleeve, and one end of the rotary arm rests on the column on one side of the torsion spring shaft, so that the rotary arm coincides with the 0-degree line, and the other end of the rotary arm in a free state is located between the column on one side of the torsion spring shaft and the vertical rod of the pointer, and rotates with the vertical rod of the pointer under the drive of the torque wrench.

[0017] Compared with the prior art, the utility model has the following advantages:

[0018] 1. Realize quick disassembly and quick replacement

[0019] The utility model adopts a split design for the base component and the rotating component, and the installation adopts an insertion and nesting method, which does not require thread locking, thereby realizing quick disassembly and quick replacement of the torsion spring.

[0020] 2. Synchronous real-time torque testing

[0021] The utility model can use the torque wrench to read the real-time torque value of the torsion spring rotation, which can be synchronized with the maximum angle test, and there is no need to repeat the force value test separately, thereby improving the test efficiency.

[0022] 3. Relative reading measurement angle

[0023] The utility model can read the initial angle and the end angle in real time through the angle ruler / angle line, and the rotation angle can be obtained by simple calculation, eliminating the individual differences of the torsion spring due to production and manufacturing, and is more accurate than the standard value of the set range.

[0024] 3. Strong compatibility

[0025] Torsion springs of similar sizes may also have different specifications. The utility model can adapt to torsion springs with different inner diameters and different coil heights by providing different torsion spring sleeves. It is compatible with torsion springs of similar sizes but different specifications, and will not damage the torsion springs during testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural diagram of the utility model;

[0027] Figure 2 It is a structural diagram of the torsion spring shaft;

[0028] Figure 3 Schematic diagram of the structure of the torsion spring sleeve;

[0029] Figure 4 It is a structural diagram of the wrench shaft seat;

[0030] Figure 5 This is a schematic diagram of the assembly structure of the wrench shaft and pointer;

[0031] Figure 6 Schematic diagram of the structure of the needle tip of the pointer;

[0032] Figure 7 This is a schematic diagram of the operating principle of the utility model.

[0033] Description of reference numerals:

[0034] 1. Base plate, 2. Angle ruler, 3. Torsion spring shaft, 4. Column, 5. Wrench shaft seat, 6. Torsion spring, 7. Wrench shaft, 8. Pointer, 9. Torsion spring sleeve, 10. Torque wrench. DETAILED DESCRIPTION

[0035] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0036] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0037] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as a limitation on the utility model.

[0038] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0039] In the description of this embodiment, it should be noted that, unless otherwise specified or limited, the terms "disposed," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this embodiment based on specific circumstances.

[0040] In order to make the purpose, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0041] Example

[0042] like Figure 1As shown, the utility model provides a torsion spring testing device for realizing torque testing of outer arm torsion springs (left door torsion springs) of different specifications and models. The device mainly comprises a base plate 1, an angle ruler 2, a torsion spring shaft 3, a column 4, a wrench shaft seat 5, a bearing, a wrench shaft 7, a pointer 8, a torsion spring sleeve 9, and a torque wrench 10 used in conjunction with the torsion spring testing device. The following is a detailed introduction to each component.

[0043] The base plate 1, angle ruler 2, torsion spring shaft 3 and column 4 together constitute the base assembly. The base plate 1 is a metal plate or plastic plate with rounded rectangular shape. An angle ruler 2 or angle line is installed on the upper surface of the base plate 1. The range of the angle ruler 2 or angle line is 180 degrees, and the 0 degree line and the 180 degree line are parallel to the long bottom side of the base plate 1, and the 90 degree line is parallel to the short bottom side of the base plate 1. A torsion spring shaft 3 is vertically installed at the center of the angle ruler or angle line. Figure 2 As shown, the torsion spring shaft 3 is specifically a stepped shaft, and stepped shaft-shaped columns 4 are respectively provided on both sides of the torsion spring shaft 3 to support the torsion spring 6 swing arm. The two columns 4 are equidistant from the torsion spring shaft 3, and the line connecting the two columns 4 is parallel to the long bottom side of the base plate 1 and is closer to the long bottom side of the base plate 1 than the torsion spring shaft 3.

[0044] like Figure 3 As shown, a torsion spring sleeve 9 is sleeved on the torsion spring shaft 3. The torsion spring sleeve 9 is a hollow stepped sleeve. The torsion spring 6 to be tested is sleeved on the torsion spring sleeve 9. By replacing the torsion spring sleeve 9 with different sizes, it can adapt to torsion springs 6 with different inner diameters, thereby increasing the applicability of the device.

[0045] The wrench shaft seat 5, bearing, wrench shaft 7 and pointer 8 together constitute a rotating assembly, such as Figure 4 As shown, the wrench shaft seat 5 is a T-shaped metal structure with a bearing mounting hole in the middle thereof, and a bearing that cooperates with the wrench shaft 7 is installed in the bearing mounting hole. In addition, column positioning holes are symmetrically provided on both sides of the bearing mounting hole, and the two column positioning holes are respectively coordinated with the corresponding columns 4 for positioning. A positioning hole for the torsion spring shaft 3 is provided at the lower end of the wrench shaft 7, and cooperates with the torsion spring shaft 3 through the positioning hole (when the wrench shaft 7 rotates, the torsion spring shaft 3 does not rotate with the wrench shaft, and the torsion spring shaft 3 only plays a supporting role). The upper part of the wrench shaft 7 is a hexagonal head, which is used to cooperate with the torque wrench 10 to be connected through a sleeve and then rotate the wrench shaft 7. The middle part of the wrench shaft 7 is provided with a mounting hole for fixing the pointer 8.

[0046] like Figure 5 and 6As shown, the pointer 8 is Z-shaped as a whole, including an L-shaped connector and a needle tip portion that are connected to each other. The sleeve end of the L-shaped connector is sleeved on the wrench shaft 7 and fixed by screws and mounting holes. It can also adjust the height position in the vertical direction to adapt to the coil spring 6 to be tested of different heights. The upper end of the vertical rod of the L-shaped connector is connected to the sleeve end or formed as one piece, and the lower end is connected to the needle tip portion (in this case, a pin hole is opened at the lower end of the vertical rod, and a pin hole is also opened at the corresponding position of the needle tip portion. The two are fixed by pins during installation to form the pointer 8 as a whole). The needle tip portion rotates together with the wrench shaft 7 at the angle ruler 2 or the angle line, thereby indicating the current rotation angle.

[0047] like Figure 7 As shown, the method of using the torsion spring testing device is as follows:

[0048] Install the base 1 on the workbench table, fix the angle ruler 2 on the upper surface of the base 1 (or mark the angle line on the upper surface of the base 1) to indicate the rotation angle. After starting work, first select the torsion spring sleeve 9 that matches the specifications of the torsion spring 6 to be tested, put the torsion spring sleeve 9 on the torsion spring shaft 3, and then put the torsion spring 6 to be tested on the torsion spring sleeve 9 (torsion springs with different inner diameters can be adapted by replacing torsion spring sleeves 9 of different specifications). One end of the torsion spring 6 to be tested rests on the column 4 on one side of the torsion spring shaft 3 ( Figure 1 The left column in the middle), the other end of the arm is free and located between the left column and the vertical rod of the pointer 8, at which time the torsion spring 6 is installed in place;

[0049] Align the lower end of the wrench shaft 7 with the upper end of the torsion spring shaft 3 through the positioning hole for installation. Align the two column positioning holes on the wrench shaft seat 5 with the two columns 4 respectively, and align the bearings in the bearing mounting holes on the wrench shaft seat 5 with the wrench shaft 7. Install the wrench shaft seat 5 vertically from top to bottom until it is stuck on the step of the column 4. It should be noted that the needle tip of the pointer 8 needs to be rotated to the side of the free state swing arm direction of the torsion spring 6 in advance, and it cannot interfere with the torsion spring 6;

[0050] Use the torque wrench 10 to rotate the wrench shaft 7 to drive the pointer 8 to rotate until the vertical rod of the pointer 8 just touches the torsion spring 6 to be tested. At this time, read the angle ruler / scale line reading, which is recorded as the initial angle a1. Continue to rotate the wrench shaft 7 to the set angle by the torque wrench 10 and observe the pointer 8 and read the reading of the angle ruler 2, which is recorded as the end angle a2. The difference between the end angle a2 and the initial angle a1 is the rotation angle a of the torsion spring 6 to be tested. This is used to judge whether the rotation angle of the torsion spring 6 to be tested can meet the standard. If the rotation angle a is less than the standard angle a0, it is judged to be unqualified, otherwise it is judged to be qualified. For the torsion spring 6 to be tested with a qualified rotation angle, read the real-time torque T of the torque wrench 10 at the end angle a2, and compare it with the standard torque T0 to determine whether it meets the standard. If the real-time torque T is less than the standard torque T0, it is judged to be unqualified, otherwise it is judged to be qualified.

[0051] The standard angles and standard torques corresponding to different types of coil springs are shown in the following table.

[0052] Table 1 Coil spring specifications, standard angles and standard torques

[0053]

[0054] As shown in the table above, a torsion spring with an arm angle of 90° was tested. Its specifications are as follows: inner diameter 2mm, number of turns 2, wire diameter 0.2mm, arm length 20mm, and maximum rotation angle 41°. Under the working condition of the maximum rotation angle of 41°, the standard torque of the torsion spring is 41°*0.0115N·mm / deg=0.4715N·mm. This is used as the test basis. The standards for torsion springs of other models and specifications during testing can also be obtained according to Table 1.

[0055] After the inspection is completed, the torque wrench 10 and the rotating assembly are removed, the torsion spring 6 is taken out, the unqualified torsion spring 6 is marked, and the qualified torsion spring 6 is sent to the next process; the staff rotates the torque wrench 10 to drive the torsion spring 6 to rotate until the pointer 8 points to the set angle value on the angle ruler 2 / angle line (in order to reduce the manual base error, an angle range including the set angle value can also be used), and uses the torque wrench 10 to test the torque of the spring 6 in real time. When the test is completed, the current torsion spring 6 to be tested can be removed and the next new torsion spring 6 can be tested. In this way, by testing the torsion spring 6 separately, the use environment of the torsion spring 6 can be simulated. When used with the torque wrench 10, the maximum torsion angle and maximum torsion torque of the torsion spring 6 can also be tested. Parameters such as the maximum torsion angle and the maximum torsion torque of the torsion spring 6 can be discovered in time, and inferior and unqualified torsion springs 6 do not need to be disassembled and reassembled.

[0056] The base assembly and rotating assembly of the device adopt a split structure, and the installation adopts an insertion and nesting method, which realizes the quick disassembly and replacement of the torsion spring 6. The torsion spring sleeve 9 can make the operation of the torsion spring testing device more compatible and more adaptable. The torsion spring testing device can fully simulate the use environment of the torsion spring 6. When used with the torque wrench 10, it can test the maximum torsion angle, maximum working torque and other related performance parameters of the torsion spring 6 (these parameters are generally given by the torsion spring manufacturer, and the device can be used to test product parameters), providing a basis for judging the qualified inspection of the torsion spring 6. In addition, due to the limitations of the manufacturing process of the torsion spring 6, there are differences in the positions of the two ends of the torsion spring 6, and the consistency is not high. Compared with the absolute value measurement method, the relative value test adopted by the device is more accurate in the screening test of the torsion spring 6.

[0057] The above describes in detail the preferred embodiments of the present invention. It should be understood that those skilled in the art can make numerous modifications and variations based on the concepts of the present invention without inventive effort. Therefore, any technical solutions that can be derived by those skilled in the art based on the concepts of the present invention through logical analysis, reasoning, or limited experimentation based on the existing technology should be within the scope of protection defined by the claims.

Claims

1. A torsion spring testing device, characterized in that: include: The base assembly comprises a base plate (1) and an angle unit, a torsion spring shaft (3) and a column (4) respectively arranged on the base plate (1); the torsion spring shaft (3) is fixed at the center of the angle unit; the columns (4) are respectively arranged on the left and right sides of the torsion spring shaft (3); and a torsion spring sleeve (9) is sleeved on the torsion spring shaft (3); The rotating assembly comprises a wrench shaft seat (5) sleeved on the column (4), a bearing mounted in a bearing mounting hole of the wrench shaft seat (5), a wrench shaft (7) passing through the bearing and having its lower end rotatably connected to the upper end of the torsion spring shaft (3), and a pointer (8), wherein one end of the pointer (8) is sleeved on the wrench shaft (7) and the other end cooperates with the angle ruler (2) to indicate an angle.

2. A torsion spring testing device according to claim 1, characterized in that: The angle unit is an angle ruler (2) mounted on the base plate (1) or an angle line engraved on the base plate (1), and the measuring range of the angle ruler (2) or the angle line is 180 degrees.

3. A torsion spring testing device according to claim 2, characterized in that: The 0-degree line and the 180-degree line of the angle ruler (2) or the angle line are parallel to the long bottom side of the base plate (1), and the 90-degree line is parallel to the short bottom side of the base plate (1).

4. A torsion spring testing device according to claim 1, characterized in that: The torsion spring shaft (3) and the column (4) are both stepped shafts, the two columns (4) are equidistant from the torsion spring shaft (3), and the line connecting the two columns (4) is parallel to the long bottom side of the base plate (1) and is closer to the long bottom side of the base plate (1) than the torsion spring shaft (3).

5. The torsion spring testing device according to claim 1, characterized in that: The torsion spring sleeve (9) is a hollow stepped table-shaped sleeve, and its size matches the inner diameter of the coil spring (6) to be tested.

6. The torsion spring testing device according to claim 1, characterized in that: The wrench shaft seat (5) is a T-shaped metal structural part, and column positioning holes for cooperating with corresponding columns (4) are symmetrically provided on both sides of the bearing mounting hole.

7. The torsion spring testing device according to claim 1, characterized in that: The lower end of the wrench shaft (7) is provided with a positioning hole which is rotatably connected with the upper end of the torsion spring shaft (3); the upper part of the wrench shaft (7) is a hexagonal head, and the middle part is provided with a mounting hole for fixing the pointer (8).

8. The torsion spring testing device according to claim 7, characterized in that: The pointer (8) is in a Z-shape as a whole, and comprises an L-shaped connecting piece and a needle tip portion connected to each other. The sleeve end of the L-shaped connecting piece is sleeved on the wrench shaft (7) and fixed by screws matching the mounting hole. The upper end of the vertical rod of the L-shaped connecting piece is connected to the sleeve end or formed as one piece, and the lower end is connected to the needle tip portion. The needle tip portion cooperates with the angle unit to indicate the current rotation angle.

9. The torsion spring testing device according to claim 1, characterized in that: The device also includes a torque wrench (10) and a sleeve, wherein the torque wrench (10) is connected to the upper end of the wrench shaft (7) through the sleeve for rotation operation.

10. The torsion spring testing device according to claim 9, characterized in that: The coil spring (6) to be tested is sleeved on the torsion spring sleeve (9), and one end of the rotary arm abuts against the column (4) on one side of the torsion spring shaft (3), so that the rotary arm coincides with the 0-degree line. The other end of the rotary arm in a free state is located between the column (4) on one side of the torsion spring shaft (3) and the vertical rod of the pointer (8), and rotates along with the vertical rod of the pointer (8) under the drive of the torque wrench (10).

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