Torsion measuring device for torsional spring

Abstract

The utility model relates to a torsion measuring device for a torsion spring, which belongs to the technical field of torsion spring torsion measurement and comprises a set of fixed component and a set of movable component, the fixed component comprises a bottom plate, a bearing, a support block and a fixed rod, the bearing, the support block and the fixed rod are arranged on the bottom plate, and the bearing is fixedly arranged in a shaft hole arranged on the top surface of the bottom plate. The supporting block is annularly arranged on the bottom plate on the periphery of the shaft hole so that a limiting cavity can be defined on the top face of the bottom plate, the fixing rod is arranged in the limiting cavity and used for fixing the first end of the torsional spring, and the pointer is arranged above the limiting cavity in the radial direction. And the movable assembly comprises a rotating shaft, a shaft sleeve fixedly sleeved on the rotating shaft, a rotating rod seat fixedly arranged on the shaft sleeve, a driving lever fixedly arranged at the bottom of the rotating rod seat, and a digital display torque wrench fixedly arranged at the top of the rotating shaft. The device can be used for detecting the consistency of the torsion of the torsion spring.

Description

Technical Field

[0001] This utility model relates to the field of torsion spring torque measurement technology, and in particular to a torsion spring torque measurement device. Background Technology

[0002] Before torsion springs are produced, their torque must be randomly checked using a torque measuring tool to determine whether the batch of torsion springs is qualified. Since the structures of torsion springs vary between different batches, it is difficult to use the same torque measuring tool to measure torsion springs with different structures.

[0003] For example, the utility model patent with authorization publication number CN206440412U discloses a torsion spring force measuring machine, including a fixed platform, a sensor, a lever, a fixed shaft, a rotating platform, a linkage turntable, and a hand-cranked graduated turntable. A hand-cranked graduated turntable is located on one side of the rotating platform, and a linkage turntable is located adjacent to the hand-cranked turntable. A lever is fixedly mounted on the surface of the linkage turntable. A fixed shaft is located on one side of the lever, and a sensor is located on one side of the fixed shaft. The sensor and the fixed shaft are both fixedly mounted on the surface of the fixed platform. A test torsion spring is fitted onto the fixed shaft. One end of the test torsion spring is slidably connected to the sensor, and the other end is slidably connected to the lever. The hand-cranked graduated turntable is drive-connected to the linkage turntable. The torsion spring is fitted onto the fixed shaft, one end of the torsion spring is placed on the sensor, and the other end is placed on the lever of the linkage turntable. The hand-cranked turntable is rotated to a unit angle, and the linkage turntable rotates to the same unit angle. During this process, the torsion spring is twisted and deformed. The sensor detects the torsion spring pressure in real time and calculates the torque to complete the test. Based on the above textual description and the accompanying drawings of the patent, it can be seen that the torsion spring force measuring machine disclosed in the patent is only applicable to torsion springs whose two ends are folded outward relative to the axial direction of the helical body.

[0004] and Figure 1 Another common type of torsion spring 30 includes a helical body 31. The first end of the helical body 31 has a radially inwardly bent head 32, and the second end of the helical body 31 near its end has a radially inwardly bent portion 33. The end of the bent portion 33 is flexed outward relative to the axial direction of the helical body 31. Therefore, Figure 1 The torsion spring 30 shown has only one end axially bent outwards, so the torsion spring force measuring machine disclosed in the above patent is obviously not applicable to it. Therefore, a special torque measuring tool needs to be designed for this type of torsion spring 30. Utility Model Content

[0005] This invention aims to provide a torsion spring torque measuring device, specifically used for detecting, for example, the torque of a torsion spring. Figure 1 The torque of the torsion spring shown.

[0006] Therefore, the present invention adopts the following technical solution:

[0007] A torsion spring torque measuring device, comprising:

[0008] Torsion spring;

[0009] A fixing assembly; the fixing assembly includes a base plate and a bearing, a support block and a fixing rod disposed on the base plate. The bearing is fixedly disposed in a shaft hole provided on the top surface of the base plate. The support block includes three or more blocks that are evenly arranged around the shaft hole on the base plate to form a limiting cavity on the top surface of the base plate for vertical insertion and to keep the torsion spring upright on the base plate. The fixing rod is disposed inside the limiting cavity for fixing the first end of the torsion spring.

[0010] The movable component includes a rotating shaft, a bushing fixed to the rotating shaft, a rotating rod seat fixed to the bushing, a lever fixed to the bottom of the rotating rod seat, and a digital torque wrench fixed to the top of the rotating shaft. The rotating shaft is used to be movably inserted into the bearing from above, the lever is used to drive the torsion spring to twist from the second end, and the digital torque wrench is used to drive the rotating shaft to rotate and display the torque value after the torsion spring rotates.

[0011] This utility model features a bearing, a limiting cavity, and a fixing rod on a base plate, and a lever and a digital torque wrench mounted on a rotating shaft. The limiting cavity prevents eccentric movement when the torsion spring is twisted. The fixing rod secures the first end of the torsion spring. The rotating shaft movably connects to the bearing and drives the lever to rotate. The lever drives the torsion spring to twist from the second end. The digital torque wrench drives the rotating shaft to rotate and displays the torque value after the torsion spring is twisted. Its structure is similar to... Figure 1 The torsion springs described are matched with each other and can be used for batch testing of the torsion force of torsion springs of this type to ensure they meet the requirements. Furthermore, this invention features a simple structure, ease of use, and low manufacturing cost. Attached Figure Description

[0012] Figure 1 A schematic diagram of the torsion spring structure to which this utility model applies;

[0013] Figure 2 This is a schematic diagram of the structure of a torsion spring torque measuring device according to the present invention;

[0014] Figure 3 This is a schematic diagram of the fixing component structure of this utility model;

[0015] Figure 4 This is a schematic diagram of the active component structure of this utility model;

[0016] Figure 5 This is a schematic diagram showing the usage state of the fixing component of this utility model;

[0017] Figure 6 This is one of the schematic diagrams showing the use of a torsion spring torque measuring device according to this utility model. The dashed arrow in the figure indicates the torsion direction of the torsion spring.

[0018] Figure 7This is the second schematic diagram of the torsion spring torque measuring device of this utility model in use;

[0019] Figure 8 This is a cross-sectional view of the torsion spring torque measuring device of this utility model in use.

[0020] The following are labeled in the diagram: 10. Fixed component; 11. Base plate; 11.1. Shaft hole; 11.2. First screw hole; 11.3. Straight blind groove; 11.31. Second screw hole; 11.4. Scale line; 12. Bearing; 13. Support block; 13.1. First straight through hole; 14. Fixed rod; 15. Pointer; 16. First screw; 17. Adjusting rod seat; 17.1. Second straight through hole; 18. Second screw; 19. Screw; 110. Adjusting nut; 20. Movable component; 21. Rotating shaft; 21.1. Protruding key; 21.2. Polygonal stud. 22. Bushing; 22.1. Keyway; 22.2. Flat surface; 22.21. Third threaded hole; 22.3. Fourth threaded hole; 23. Rotary rod seat; 23.1. Third straight through hole; 23.2. Fourth straight through hole; 23.3. Insertion hole; 24. Lever; 25. Angle disc; 25.1. Disc center hole; 25.2. Arc-shaped through hole; 26. Digital torque wrench; 26.1. Digital torque gauge; 26.2. Handle; 26.3. Connecting handle; 26.4. Sleeve; 30. Torsion spring; 31. Helical body; 32. Bending head; 33. Bending part. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] like Figure 2 and Figure 3 The torsion spring torque measuring device shown is specifically used to detect, for example, the torque of a torsion spring. Figure 1 The torsion spring 30 shown includes a fixing assembly 10, which comprises a base plate 11, a bearing 12, a support block 13, a fixing rod 14, and a pointer 15, wherein:

[0023] like Figure 2-3 As shown, the base plate 11 is a rectangular plate with a shaft hole 11.1 in the center that is open to both the top and bottom. The bearing 12 is fixedly installed at the bottom of the shaft hole 11.1.

[0024] like Figure 2-3As shown, the support blocks 13 include four blocks, which are evenly arranged around the top surface of the base plate 11 surrounding the shaft hole 11.1, forming a limiting cavity on the top surface of the base plate 11 where the torsion spring 30 can be vertically inserted and the torsion spring 30 can stand upright on the base plate 11. To prevent the torsion spring 30 from eccentrically moving during torsion, the height of all support blocks 13 is not lower than the height of the torsion spring 30 and they are all located at a position that lightly touches the torsion spring 30 or is located adjacent to the torsion spring 30. The four support blocks 13 are all rectangular blocks with the same structure, and their length direction is radially arranged relative to the shaft hole 11.1. Each support block 13 has a first straight through hole 13.1 that is open from top to bottom relative to the shaft hole 11.1. A first screw 16 is provided in the first straight through hole 13.1, and the first screw 16 is screwed into a first screw hole 11.2 provided on the top surface of the base plate 11 to lock the support block 13 onto the base plate 11 and to allow the support block 13 to be radially adjusted to a suitable position according to the size of the torsion spring 30. Each support block 13 has a scale line 11.4 radially on the top surface of the base plate 11 relative to the shaft hole 11.1. In order to match the size of the limiting cavity with the size of the torsion spring 30, before testing a batch of torsion springs 30, the support block 13 can be precisely radially adjusted with reference to the scale line 11.4 so that the inner ends of each support block 13 are on the same circumference.

[0025] like Figure 2-3 As shown, a straight blind groove 11.3 is radially provided on the top surface of the base plate 11 surrounding the shaft hole 11.1. The straight blind groove 11.3 is provided along the line connecting the midpoints of the short sides of the base plate 11 and passes through the upper part of the shaft hole 11.1 and one short side of the base plate 11. An adjusting rod seat 17 is provided in the straight blind groove 11.3. The fixing rod 14 is vertically fixed to the top of the inner end of the adjusting rod seat 17 and located inside the limiting cavity, so as to hang the bending head 32 of the first end of the torsion spring 30 from the inside. The adjusting rod seat 17 has a second straight through hole 17.1 that is connected to the top and bottom along the length of the straight blind groove 11.3. A second screw 18 is provided in the second straight through hole 17.1. The second screw 18 is screwed into the second screw hole 11.31 provided at the bottom of the straight blind groove 11.3 to lock the adjusting rod seat 17 onto the base plate 11. This allows the adjusting rod seat 17 and the fixing rod 14 to be radially adjusted according to the size of the torsion spring 30 to a position where the bent head 32 of the first end of the torsion spring 30 can be hooked.

[0026] like Figure 2-3 As shown, a screw 19 is erected on the top surface of the base plate 11 outside the limiting cavity. Two adjusting nuts 110 are screwed onto the screw 19. A pointer 15 is provided between the two adjusting nuts 110. The pointer 15 is movably sleeved on the screw 19 between the two adjusting nuts 110 through a rod sleeve provided at its needle tail. The two adjusting nuts 110 lock and fix the needle tail of the pointer 15 to the screw 19, so that the pointer 15 is radially positioned above the limiting cavity and the height of the pointer 15 is adjustable.

[0027] In addition, such as Figure 2 As shown, in order to facilitate the handling of the entire fixed assembly 10, a handle 111 can be provided on the top surface of the base plate 11.

[0028] like Figure 2 and 4 As shown, the device also includes a movable component 20 that works in conjunction with the fixed component 10 to drive the torsion spring 30 to twist from the second end and display the torque value of the torsion spring 30 after twisting. The movable component 20 includes a rotating shaft 21, a bushing 22 sleeved and fixed on the rotating shaft 21, a rotating rod seat 23 fixed on the bushing 22, a lever 24 fixed at the bottom of the rotating rod seat 23, an angle disc 25 fixed at the top of the rotating rod seat 23 and sleeved on the rotating shaft 21 through its center hole 25.1, and a digital torque wrench 26 fixed at the top of the rotating shaft 21, wherein:

[0029] like Figure 2-4 As shown, the outer wall near the bottom of the rotating shaft 21 is provided with several protruding keys 21.1. The bushing 22 is movably fitted into the rotating shaft 21 from the top, and is fixed by several keyways 22.1 provided at its bottom end to the protruding keys 21.1 one by one. The top of the rotating shaft 21 protrudes above the bushing 22 and the angle disk 25.

[0030] like Figure 2-4 As shown, the top of the bushing 22 has parallel planes 22.2 on both sides, and each plane 22.2 has a third screw hole 22.21. The rotating rod seat 23 has a third straight through hole 23.1 that is connected to the bottom, and each of its corresponding sides has a fourth straight through hole 23.2 that connects to the third straight through hole 23.1. The rotating rod seat 23 is sleeved on the top of the bushing 22 through its third straight through hole 23.1, and the two long surfaces of its third straight through hole 23.1 respectively clamp the two screw holes. A plane 22.2 has a third screw 27 in each of its four straight through holes 23.2 on both sides. The third screws 27 on both sides are screwed into the third screw holes 22.21 on the same side to lock the rotating rod seat 23 onto the bushing 22. The top of the rotating rod seat 22 has multiple insertion holes 23.3 along its short side. The lever 24 is fixed by inserting its top end into any of the insertion holes 23.3, thus being upright and fixed to the bottom of the bushing 22 for hanging the bent part 33 of the second end of the torsion spring 30 from the inside. In use, the position of the rotating rod seat 23 can be adjusted laterally to adjust the lever 24 to the position where the second end of the torsion spring 30 is hung.

[0031] like Figure 2-4As shown, the angle disk 25 is horizontally positioned on top of the bushing 22, and its top surface is provided with an angle gauge surrounding its center hole 25.1. The tip of the pointer 15 is located above the angle disk 25 and points radially towards the angle gauge. The angle disk 25 has two or more arc-shaped through holes 25.2 surrounding its center hole 25.1. Each arc-shaped through hole 25.2 contains a fourth screw 28, and each fourth screw 28 is screwed into a corresponding fourth screw hole 22.3 on the top surface of the bushing 22 to lock the angle disk 25 onto the bushing 22. During installation, the angle disk 25 can be adjusted circumferentially to align the pointer 15 with its zero mark in the initial state.

[0032] like Figure 2-4 As shown, the digital torque wrench 26 includes a digital torque meter 26.1. The digital torque meter 26.1 is rectangular, with a drive end and an input end on its corresponding two sides. A handle 26.2 is fixedly provided on the drive end, and a connector 26.3 is fixedly provided on the input end. The handle 26.2, the digital torque meter 26.1, and the connector 26.3 are coaxially arranged. A sleeve 26.4 is radially fixed on the connector 26.3. The sleeve 26.4 is sleeved and locked onto the shaft head 21.2 at the top of the rotating shaft 21 to fix the digital torque wrench 26 and the rotating shaft 21 into a whole, and to make the digital torque wrench 26 and the rotating shaft 21 perpendicular to each other.

[0033] like Figure 1 and 5 As shown, when testing the torsion spring 30, the torsion spring 30 can be placed in the limiting cavity on the base plate 11 with the first end down and the second end up. The bent head 32 of the first end of the torsion spring 30 is then hooked onto the fixing rod 14 from the inside. The torsion spring 30 can fall freely onto the base plate 11 under its own weight. The four support blocks 13 together ensure that the helical body 31 of the torsion spring 30 is in a vertical state from the outside. Then, as... Figure 6-8 As shown, the entire movable assembly 20 is picked up by holding handle 26.2, and the rotating shaft 21 is moved to connect with bearing 12 from above. The lever 25 is then hooked onto the bent portion 33 at the second end of the torsion spring 30 from the inside. The digital torque wrench 26 is driven to rotate horizontally via handle 26.3, causing the rotating shaft 21, bushing 22, rotating rod seat 23, lever 24, and angle disc 25 to rotate synchronously in the same direction. When lever 24 rotates, it drives the torsion spring 30 to twist from the second end. The pointer 15 and angle disc 25 can cooperate to display the twist angle. The torque of the torsion spring 30 after twisting is transmitted sequentially through lever 24, rotating rod seat 23, bushing 22, rotating shaft 21, sleeve 26.4, and connector 26.3 to the digital torque meter 26.1, which displays the torque value. By twisting all torsion springs 30 by the same angle, it can be determined whether the torque of each torsion spring 30 is within the acceptable range.

[0034] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A torsion spring torque measuring device, characterized in that, include: Torsion spring (30); Fixing assembly (10); The fixing assembly (10) includes a base plate (11) and a bearing (12), a support block (13) and a fixing rod (14) disposed on the base plate (11). The bearing (12) is fixedly disposed in the shaft hole (11.1) provided on the top surface of the base plate (11). The support block (13) includes three or more evenly arranged around the base plate (11) around the shaft hole (11.1) to form a limiting cavity on the top surface of the base plate (11) for vertical insertion and torsion spring (30) standing upright on the base plate (11). The fixing rod (14) is disposed inside the limiting cavity for fixing the first end of the torsion spring (30). The movable component (20) includes a rotating shaft (21), a bushing (22) fitted and fixed on the rotating shaft (21), a rotating rod seat (23) fixed on the bushing (22), a lever (24) fixed at the bottom of the rotating rod seat (23), and a digital torque wrench (26) fixed at the top of the rotating shaft (21). The rotating shaft (21) is used to be movably inserted into the bearing (12) from above. The lever (24) is used to drive the torsion spring (30) to rotate from the second end. The digital torque wrench (26) is used to drive the rotating shaft (21) to rotate and display the torque value after the torsion spring (30) rotates.

2. The torsion spring torque measuring device according to claim 1, characterized in that: The height of the support block (13) is not less than the height of the torsion spring (30) and it is located at a position that lightly touches the torsion spring (30) or is located at a position that is adjacent to the torsion spring (30).

3. A torsion spring torque measuring device according to claim 1 or 2, characterized in that: The support block (13) is fixed to the base plate (11) by the first screw (16). The support block (13) is provided with a first straight through hole (13.1) that is connected to the top and bottom in the radial direction relative to the shaft hole (11.1). The first screw (16) passes through the first straight through hole (13.1) and screws into the first screw hole (11.2) provided on the top surface of the base plate (11) to lock the support block (13) onto the base plate (11). The top surface of the base plate (11) next to each support block (13) is provided with a scale line (11.4) in the radial direction relative to the shaft hole (11.1).

4. The torsion spring torque measuring device according to claim 1, characterized in that: The shaft hole (11.1) is a through hole. The bearing (12) is fixedly installed at the lower part of the shaft hole (11.1). A straight blind groove (11.3) is provided radially on the top surface of the bottom plate (11) around the shaft hole (11.1) and passes through the upper part of the shaft hole (11.1). An adjusting rod seat (17) is fixedly installed in the straight blind groove (11.3). The fixing rod (14) is vertically fixed to the top of the inner end of the adjusting rod seat (17).

5. The torsion spring torque measuring device according to claim 4, characterized in that: The adjusting rod seat (17) is fixed in the straight blind groove (11.3) by the second screw (18). The adjusting rod seat (17) has a second straight through hole (17.1) with the top and bottom connected along the length of the straight blind groove (11.3). The second screw (18) passes through the second straight through hole (17.1) and screws into the second screw hole (11.31) at the bottom of the straight blind groove (11.3) to lock the adjusting rod seat (17) onto the bottom plate (11) of the straight blind groove (11.3).

6. A torsion spring torque measuring device according to claim 1, 2, 4 or 5, characterized in that: A screw (19) is vertically mounted on the top surface of the base plate (11) outside the confinement cavity. Two adjusting nuts (110) are screwed onto the screw (19). The pointer (15) is movably connected to the screw (19) between the two adjusting nuts (110) through the rod sleeve provided at its needle end, so as to be locked and fixed to the screw (19) by the two adjusting nuts (110).

7. The torsion spring torque measuring device according to claim 1, characterized in that: The outer wall near the bottom of the rotating shaft (21) is provided with several protruding keys (21.1). The bushing (22) is movably fitted into the rotating shaft (21) from the top, and is fixed by several keyways (22.1) at its bottom end to connect with the protruding keys (21.1) one by one.

8. The torsion spring torque measuring device according to claim 1, characterized in that: The top of the bushing (22) has parallel planes (22.2) on both sides, and each of the two planes (22.2) has a third screw hole (22.21). The rotating rod seat (23) has a third straight through hole (23.1) that is connected to the bottom, and each of its two sides has a fourth straight through hole (23.2) that is connected to the third straight through hole (23.1). The rotating rod seat (23) is sleeved on the top of the bushing (22) through its third straight through hole (23.1) and clamps the two planes (22.2) on the two long surfaces of its third straight through hole (23.1). Each of the four straight through holes (23.2) on both sides has a third screw (27). The third screws (27) on both sides are screwed into the third screw hole (22.21) on the same side, and together they lock the rotating rod seat (23) onto the bushing (22).

9. A torsion spring torque measuring device according to any one of claims 1, 7 to 8, characterized in that: The top of the rotating shaft (21) protrudes above the angle disc (25) and has a shaft head (21.2) at its top. The digital torque wrench (26) includes a digital torque meter (26.1), a handle (26.2) coaxially located on both sides of the digital torque meter (26.1), and a connector (26.3). A sleeve (26.4) is radially provided on the connector (26.3), and the sleeve (26.4) is fitted and locked onto the shaft head (21.2).

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