A device for controlling initial torque and stroke of a spiral spring
Through the mechanically designed initial torque and stroke control device of the worm coil spring, the initial torque and stroke control device of the worm coil spring are meshed by the coil spring cylinder and the limiting body, and the problem of inaccurate control in the prior art is solved and is suitable for aerospace tasks.
Patent Information
- Application Number
- CN202310616742.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-05-29
- Publication Date
- 2025-08-22
- Estimated Expiration
- 2043-05-29
AI Technical Summary
The initial torque and stroke of existing worm coil springs are difficult to accurately control, resulting in large performance deviations and even damage to the spring.
The initial torque and stroke control device of the worm spring with a purely mechanical design is adopted. Through the cooperation of the coil spring assembly and the limit assembly, the rotation of the coil spring cylinder and the engagement of the limiting body are used to achieve precise control of the initial torque and stroke.
It realizes precise control of the initial torque and stroke of the worm coil spring. The device is small in size, light in weight, strong space adaptability, simple in operation, and suitable for aerospace missions.
Smart Images
Figure CN116677736B_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the field of spiral spring space design and relates to a spiral spring initial torque and stroke control device. Background Art
[0002] With the rapid development of my country's aerospace industry, spacecraft functionality continues to increase, and their mechanisms are becoming increasingly diverse. Scroll springs can provide torsional torque, which is converted into tension through a rotating shaft. They offer advantages such as small size, high energy storage, and strong spatial adaptability. As space missions continue to deepen and their functionality improves, scroll springs are increasingly widely used in space missions.
[0003] The torque generated by a volute spring during tightening and loosening at the same rotation angle is different and nonlinear. Scroll springs maintain stable performance within a certain operating range. Beyond this operating range, performance can deviate significantly, and the volute spring itself can even be damaged. Under normal circumstances, the initial torque and travel of a volute spring are subject to significant performance variations, making precise control impossible. Summary of the Invention
[0004] The technical problem solved by the present invention is to overcome the deficiencies of the prior art and propose a volute spring initial torque and stroke control device, which adopts a purely mechanical design and has the characteristics of small size, light weight, strong space adaptability, and easy use.
[0005] The solution of the present invention is:
[0006] A device for controlling the initial torque and stroke of a volute spring comprises a coil spring assembly, a limit assembly, a central shaft, a housing, a bearing, a bearing sleeve, an adjustment cylinder, and an end cap; wherein the coil spring assembly comprises a volute spring, a coil spring cylinder, a coil spring latch, a coil spring inner shaft, and an inner shaft key; and the limit assembly comprises a lower limit body, a middle limit body, an upper limit body, and a limit key;
[0007] The coil spring assembly is installed from bottom to top in the coil spring groove at the lower end of the housing; the coil spring latch passes through the coil spring barrel positioning hole and the outer positioning hole of the volute spring in sequence; the inner nail cap structure of the coil spring latch prevents the volute spring from falling out, and the outer flip structure prevents the coil spring latch from entering the coil spring barrel; the outer side of the volute spring and the coil spring barrel are connected together; the volute spring is coiled into the coil spring barrel, and the inner bent hook of the volute spring is hooked with the slotted hook of the coil spring inner shaft; the coil spring inner shaft is connected to the central shaft via the inner shaft key, forming the coil spring assembly;
[0008] The lower limit body is fixed to the upper end of the middle partition of the shell; the limit teeth of the lower limit body face upward; a layer of middle limit body is placed on the lower limit body; the limit teeth of the middle limit body face downward and mesh with the limit teeth of the lower limit body; multiple layers of middle limit bodies are stacked in sequence, and the limit teeth of the stacked middle limit bodies all face downward and mesh together in sequence; the limit teeth of the upper limit body face downward, the central axis passes through the stacked middle limit bodies, and the upper limit body is connected to the central axis through a limit key; the three limit bodies mesh with each other through the limit teeth to form a limit assembly; the limit assembly is axially constrained on the middle partition of the shell by the adjustment cylinder and the central axis;
[0009] A bearing is placed in the bearing groove at the upper end of the middle partition of the shell; the inner side of the bearing is a bearing sleeve, and the bearing sleeve passes through the center shaft; the upper end of the shell is an end cover, and a bearing is placed in the end cover, and the bearing passes through the center shaft, and the lower end of the bearing is in contact with the upper end of the boss of the center shaft.
[0010] In the above-mentioned device for controlling the initial torque and stroke of a volute spring, the process for setting the initial torque of the volute spring is as follows:
[0011] The coil spring assembly is rotated counterclockwise through the coil spring barrel; the coil spring assembly drives the central shaft to rotate counterclockwise, the central shaft drives the upper limit body to rotate, the upper limit body drives the uppermost middle limit body to rotate through the limit teeth, and the stacked middle limit bodies drive the middle limit teeth of the next layer to rotate through the limit teeth in turn, until the limit teeth of the middle limit body of the last layer engage with the limit teeth of the lower limit body, and the central shaft stops rotating; continue to rotate the coil spring assembly counterclockwise, the volute spring begins to deform and generate torque; continue to rotate the coil spring assembly to the set initial torque, keep the coil spring barrel in position, fix the coil spring barrel on the housing, and complete the setting of the initial torque of the volute spring.
[0012] In the above-mentioned device for controlling the initial torque and stroke of a volute spring, the stroke control process is as follows:
[0013] After the initial torque setting of the volute spring is completed, the center shaft rotates clockwise; the center shaft drives the upper limit body to rotate, and the limiting teeth of the upper limit body drive the uppermost middle limit body to rotate in the opposite direction; the stacked middle limit bodies drive the middle limit teeth of the next layer to rotate in turn through the limiting teeth, until the limiting teeth of the middle limit body of the last layer are engaged with the limiting teeth of the lower limit body in the opposite direction, the center shaft stops rotating, and the clockwise rotation angle of the centerline shaft is the working stroke of the volute spring.
[0014] In the above-mentioned device for controlling the initial torque and stroke of a volute spring, the initial torque of the volute spring is controlled by rotating the angle of the spring barrel, and the working stroke is controlled by the number of layers of the intermediate limiter.
[0015] In the above-mentioned volute spring initial torque and stroke control device, the torque is provided by the volute spring; the inner side of the volute spring is a bending hook, and the outer side of the volute spring is provided with a connection positioning hole.
[0016] In the above-mentioned spiral spring initial torque and stroke control device, the inner side of the coil spring pin is a nail cap structure, and the middle is a cylindrical section; a slot is opened between the nail cap and the cylindrical section, and the outer side is a circular convex shoulder flange.
[0017] In the above-mentioned spiral spring initial torque and stroke control device, the coil spring barrel is a cylindrical structure; a sunken positioning hole is opened in the middle of the outer wall of the coil spring barrel, and an external hexagonal corner for loading torque is provided at the bottom end.
[0018] In the above-mentioned initial torque and stroke control device of a volute spring, the upper end of the lower limit body is provided with a limit tooth, and the rest of the upper end except the limit tooth part is a smooth plane; the middle of the lower limit body is a circular mounting hole, and a screw hole is left on the upper end surface.
[0019] In the above-mentioned volute spring initial torque and stroke control device, the lower end of the middle limit body is a limit tooth, and the upper and lower end surfaces of the limit tooth are smooth planes; the middle is a circular mounting hole.
[0020] In the above-mentioned initial torque and stroke control device for a volute spring, the lower end of the lower limit body is a limit tooth, and the rest of the lower end except the limit tooth part is a smooth plane; a guide shaft extends from the middle lower end, and the middle of the guide shaft is a circular mounting hole, and a keyway is opened on the inside of the guide shaft.
[0021] The beneficial effects of the present invention compared with the prior art are:
[0022] (1) The device for controlling the initial torque and stroke of the volute spring of the present invention can adjust the position of the limit teeth according to the measured performance of each volute spring to achieve precise control of the initial torque of the volute spring;
[0023] (2) The device for controlling the initial torque and stroke of the volute spring of the present invention can achieve precise control of the stroke of the volute spring by adjusting the number of limit tooth layers;
[0024] (3) The initial torque and stroke control device of the volute spring of the present invention can adjust the initial torque by rotating the adjustment cylinder (7) after assembly, and has the characteristics of simple operation and wide applicability;
[0025] (4) The initial torque and stroke control device of the volute spring of the present invention adopts a purely mechanical structure, and all the components are made of metal materials that are space-resistant. They have the characteristics of high and low temperature resistance and vacuum resistance, strong spatial adaptability and long space life. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 This is an overall schematic diagram of the initial torque and stroke control device for a volute spring of the present invention;
[0027] Figure 2 This is a schematic structural diagram of the coil spring assembly of the present invention;
[0028] Figure 3 This is a schematic diagram of the structure of the limit assembly of the present invention;
[0029] Figure 4 A schematic diagram of a volute spring according to the present invention;
[0030] Figure 5 This is a schematic diagram of the coil spring bayonet of the present invention;
[0031] Figure 6 This is a schematic diagram of the inner shaft of the coil spring of the present invention;
[0032] Figure 7 This is a schematic diagram of the spring barrel of the present invention;
[0033] Figure 8 Schematic diagram of the lower limit body of the present invention;
[0034] Figure 9 Schematic diagram of the limiting body in the present invention;
[0035] Figure 10 Schematic diagram of the upper limit body of the present invention. DETAILED DESCRIPTION
[0036] The present invention will be further described below in conjunction with the embodiments.
[0037] The present invention provides a device for controlling the initial torque and stroke of a spiral spring. The device controls the initial torque of the spiral spring 11 by rotating the coil spring assembly 1, and the working stroke by controlling the number of limiter layers in the limiter assembly 2. The device utilizes a purely mechanical design and features a compact size, light weight, strong spatial adaptability, and ease of use.
[0038] The initial torque and stroke control device of the spiral spring is as follows Figure 1 As shown, it specifically includes a coil spring assembly 1, a limit assembly 2, a central shaft 3, a housing 4, a bearing 5, a bearing sleeve 6, an adjustment cylinder 7, and an end cover 8. Specifically, as Figure 2 As shown, the coil spring assembly 1 includes a spiral spring 11, a coil spring barrel 12, a coil spring latch 13, a coil spring inner shaft 14 and an inner shaft key 15. Figure 3 As shown, the limiting assembly 2 includes a lower limiting body 21 , a middle limiting body 22 , an upper limiting body 23 and a limiting key 24 .
[0039] like Figures 4 to 7As shown, the coil spring assembly 1 is installed from bottom to top in the coil spring groove at the lower end of the shell 4; wherein, the coil spring pin 13 passes through the positioning hole of the coil spring tube 12 and the positioning hole on the outside of the spiral spring 11 in sequence; the nail cap structure on the inner side of the coil spring pin 13 prevents the spiral spring 11 from falling out, and the outer side flip-over structure prevents the coil spring pin 13 from sneaking into the coil spring tube 12; the outer side of the spiral spring 11 and the coil spring tube 12 are connected together; the spiral spring 11 is coiled into the coil spring tube 12, and the inner side bent hook of the spiral spring 11 is hung together with the slotted hook of the coil spring inner shaft 14; the coil spring inner shaft 14 is connected to the central shaft 3 through the inner shaft key 15 to form the coil spring assembly 1.
[0040] The lower limiting body 21 is fixed to the upper end of the intermediate layer of the shell 4; the limiting teeth of the lower limiting body 21 face upward; a layer of middle limiting body 22 is placed on the lower limiting body 21; the limiting teeth of the middle limiting body 22 face downward and mesh with the limiting teeth of the lower limiting body 21; multiple layers of middle limiting bodies 22 are stacked in sequence, and the limiting teeth of the stacked middle limiting bodies 22 are all meshed together downward in sequence; the limiting teeth of the upper limiting body 23 face downward, the central axis 3 passes through the stacked middle limiting bodies 22, and the upper limiting body 23 is connected to the central axis 3 through the limiting key 24; the three limiting bodies are meshed through the limiting teeth to form a limiting assembly 2; the limiting assembly 2 is axially constrained on the intermediate layer of the shell 4 by the adjusting cylinder 7 and the central axis 3;
[0041] A bearing 5 is placed in the bearing groove at the upper end of the intermediate layer in the shell 4; the inner side of the bearing 5 is a bearing sleeve 6, and the bearing sleeve 6 passes through the central shaft 3; the upper end of the shell 4 is an end cover 8, and the bearing 5 is placed in the end cover 8, and the bearing 5 passes through the central shaft 3, and the lower end of the bearing 5 is in contact with the upper end of the shoulder of the central shaft 3.
[0042] The process of setting the initial torque of the spiral spring 11 is as follows:
[0043] The coil spring assembly 1 is rotated counterclockwise through the coil spring barrel 12; the coil spring assembly 1 drives the central shaft 3 to rotate counterclockwise, and the central shaft 3 drives the upper limit body 23 to rotate, and the upper limit body 23 drives the uppermost middle limit body 22 to rotate through the limit teeth, and the stacked middle limit bodies 22 drive the middle limit teeth of the next layer to rotate through the limit teeth, until the limit teeth of the middle limit body 22 of the last layer are engaged with the limit teeth of the lower limit body 21, and the central shaft 3 stops rotating; continue to rotate the coil spring assembly 1 counterclockwise, and the volute spring 11 begins to deform and generate torque; continue to rotate the coil spring assembly 1 to the set initial torque, keep the coil spring barrel 12 in place, fix the coil spring barrel 12 on the housing 4, and complete the setting of the initial torque of the volute spring 11.
[0044] The process of stroke control is:
[0045] After the initial torque setting of the volute spring 11 is completed, the center shaft 3 rotates clockwise; the center shaft 3 drives the upper limit body 23 to rotate, and the limiting teeth of the upper limit body 23 reversely drive the uppermost middle limit body 22 to rotate; the stacked middle limit bodies 22 drive the middle limit teeth of the next layer to rotate through the limiting teeth in turn, until the limiting teeth of the middle limit body 22 of the last layer are reversely meshed with the limiting teeth of the lower limit body 21, the center shaft 3 stops rotating, and the clockwise rotation angle of the centerline shaft is the working stroke of the volute spring 11.
[0046] In the present invention, the initial torque of the volute spring 11 is controlled by rotating the angle of the coil spring barrel 12, and the working stroke is controlled by the number of layers of the intermediate limiter 22. The volute spring 11 provides torque; the inner side of the volute spring 11 is a bent hook, and the outer side of the volute spring 11 is provided with a connection positioning hole.
[0047] like Figure 5 As shown, the inner side of the coil spring latch 13 is a nail cap structure, and the middle is a cylindrical section; a slot is passed through the middle of the nail cap and the cylindrical section, and the outer side is a circular convex shoulder flange.
[0048] like Figure 7 The coil spring barrel 12 is a cylindrical structure; a sunken positioning hole is opened in the middle of the outer wall of the coil spring barrel 12, and an outer hexagonal corner for loading torque is provided at the bottom.
[0049] The upper end of the lower limit body 21 has a limit tooth, and the upper end is smooth except for the limit tooth. The middle of the lower limit body 21 is a circular mounting hole, and the upper end surface has a screw hole, such as Figure 8 The lower end of the middle limiter 22 is a limiter tooth, except for the upper and lower end surfaces of the limiter tooth, which are all smooth planes; the middle is a circular mounting hole, such as Figure 9 The lower end of the lower limit body 21 is a limit tooth, and the rest of the lower end is smooth except for the limit tooth part; the middle lower end extends a guide shaft, the middle of the guide shaft is a circular mounting hole, and the inner side of the guide shaft is provided with a keyway, as shown in FIG. Figure 10 shown.
[0050] Example
[0051] The scroll spring initial torque and stroke control device primarily consists of a coil spring assembly 1, a limiter assembly 2, a center shaft 3, a housing 4, a bearing 5, a bearing sleeve 6, an adjustment cylinder 7, and an end cap 8. Coil spring assembly 1 includes a scroll spring 11, a coil spring cylinder 12, a coil spring latch 13, a coil spring inner shaft 14, and an inner shaft key 15. Limiter assembly 2 includes a lower limiter 21, a middle limiter 22, an upper limiter 23, and a limit key 24.
[0052] The assembly and debugging process of the initial torque and stroke control device of the spiral spring 11 is as follows:
[0053] The outer side of the volute spring 11 is placed within the coil spring barrel 12. The position of the volute spring 11 is adjusted so that the locating hole of the volute spring 11 is aligned with the locating hole on the side of the coil spring barrel 12. The cap structure of the coil spring latch 13 is aligned inwardly with the locating hole on the coil spring sleeve. The cap structure is squeezed and deformed toward the center. The coil spring latch 13 passes through the locating hole of the coil spring barrel 12 and the locating hole on the outer side of the volute spring 11 in sequence. The cap structure on the inner side of the coil spring latch 13 opens to prevent the volute spring 11 from escaping. The outer side of the volute spring 11 is then connected to the coil spring barrel 12. The volute spring 11 is coiled into the coil spring barrel 12. The inner coil spring shaft 14 penetrates the center of the volute spring 11 from top to bottom. The inner bent hook of the volute spring 11 engages the bent hook groove of the inner coil spring shaft 14.
[0054] The bearing 5 is embedded in the bearing groove at the upper end of the intermediate layer in the housing 4, and the bearing sleeve 6 is installed on the inner side of the bearing 5. The lower limit body 21 is fixed to the upper end of the intermediate layer in the housing 4, with the limit teeth of the lower limit body 21 facing upward; a layer of middle limit body 22 is placed on the lower limit body 21, and the limit teeth of the middle limit body 22 face downward and engage with the limit teeth of the lower limit body 21. Multiple layers of middle limit bodies 22 are stacked in sequence, and the limit teeth of the stacked middle limit bodies all face downward and engage with each other in sequence. The limit teeth of the upper limit body 23 face downward, and the middle guide shaft passes through the stacked middle limit bodies 22 and extends below the upper end face of the lower limit body 21. The upper and lower surfaces of the three limit bodies are fitted in sequence.
[0055] Adjustment tube 7 passes through center shaft 3 from bottom to top, with limit key 24 embedded in it. Limit key 24 on center shaft 3 aligns with the keyway of upper limit body 23, and passes through limit assembly 2, bearing sleeve 6, and the intermediate layer of housing 4 from top to bottom. Bearing 5 at the upper end is embedded in the bearing groove of end cover 8, which is mounted on top of housing 4 and secured with screws.
[0056] The inner shaft key 15 is installed on the center shaft 3, and the keyway of the coil spring inner shaft 14 is aligned with the inner shaft key 15 on the center shaft 3. The coil spring assembly 1 is installed from bottom to top in the coil spring slot at the lower end of the housing 4. Use a torque wrench to rotate the coil spring assembly 1 counterclockwise through the external hexagonal socket at the bottom of the coil spring barrel 12. The coil spring assembly 1 drives the center shaft 3 counterclockwise, which in turn drives the upper limit body 23. The upper limit body 23 drives the uppermost middle limit body 22 through the limit teeth. The stacked middle limit bodies 22 then drive the next layer of middle limit teeth through the limit teeth until the limit teeth of the last middle limit body 22 engage with the limit teeth of the lower limit body 21, and the center shaft 3 stops rotating. Continue to rotate the coil spring assembly 1 counterclockwise, and the volute spring 11 begins to deform and generate torque. Continue to rotate the coil spring assembly 1 to the set initial torque, keeping the coil spring barrel 12 in place. The coil spring barrel 12 is fixed to the housing 4 with screws, completing the initial torque setting of the volute spring 11. In this state, the center shaft 3 can rotate clockwise, and the center shaft 3 drives the upper limit body 23 to rotate. The limiting teeth of the upper limit body 23 reversely drive the uppermost middle limit body 22 to rotate. The stacked middle limit bodies 22 drive the middle limit teeth of the next layer to rotate through the limiting teeth in turn, until the limiting teeth of the last layer of middle limit body 22 are reversely meshed with the limiting teeth of the lower limit body 21, the center shaft 3 stops rotating, and the counterclockwise rotation angle of the center axis is the working stroke of the spiral spring 11.
[0057] The device for controlling the initial torque and stroke of the spiral spring 11 controls the initial torque of the spiral spring 11 by rotating the coil spring assembly 1, and controls the working stroke by controlling the number of layers of the limiter 22 in the limiter assembly 2. The device adopts a purely mechanical design, featuring small size, light weight, strong spatial adaptability, and ease of use.
[0058] Although the present invention has been disclosed above in terms of preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications to the technical solutions of the present invention by using the methods and technical contents disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention shall fall within the scope of protection of the technical solutions of the present invention.
Claims
1. A device for controlling the initial torque and stroke of a volute spring, characterized in that: The invention comprises a coil spring assembly (1), a limiting assembly (2), a central shaft (3), a housing (4), a bearing (5), a bearing sleeve (6), an adjusting cylinder (7), and an end cover (8); wherein the coil spring assembly (1) comprises a volute spring (11), a coil spring cylinder (12), a coil spring latch (13), a coil spring inner shaft (14), and an inner shaft key (15); and the limiting assembly (2) comprises a lower limiting body (21), a middle limiting body (22), an upper limiting body (23), and a limiting key (24); The coil spring assembly (1) is installed from bottom to top in the coil spring groove at the lower end of the housing (4); wherein the coil spring latch (13) passes through the positioning hole of the coil spring barrel (12) and the positioning hole outside the spiral spring (11) in sequence; the nail cap structure inside the coil spring latch (13) prevents the spiral spring (11) from falling out, and the outer flip-over structure blocks the coil spring latch (13) from entering the coil spring barrel (12); the outer side of the spiral spring (11) and the coil spring barrel (12) are connected together; the spiral spring (11) is coiled into the coil spring barrel (12), and the inner bent hook of the spiral spring (11) is hung together with the slotted hook of the coil spring inner shaft (14); the coil spring inner shaft (14) is connected to the central shaft (3) through the inner shaft key (15), thereby forming the coil spring assembly (1); The lower limiting body (21) is fixed to the upper end of the intermediate layer of the shell (4); the limiting teeth of the lower limiting body (21) face upward; a layer of middle limiting body (22) is placed on the lower limiting body (21); the limiting teeth of the middle limiting body (22) face downward and mesh with the limiting teeth of the lower limiting body (21); multiple layers of middle limiting bodies (22) are stacked in sequence, and the limiting teeth of the stacked middle limiting bodies (22) all face downward and mesh together in sequence; the limiting teeth of the upper limiting body (23) face downward, the central axis (3) passes through the stacked middle limiting bodies (22), and the upper limiting body (23) is connected to the central axis (3) through the limiting key (24); the three limiting bodies mesh with each other through the limiting teeth to form a limiting assembly (2); the limiting assembly (2) is axially constrained on the intermediate layer of the shell (4) through the adjusting cylinder (7) and the central axis (3); A bearing (5) is placed in a bearing groove at the upper end of a partition in the housing (4); a bearing sleeve (6) is provided inside the bearing (5), and the bearing sleeve (6) passes through the central shaft (3); an end cover (8) is provided at the upper end of the housing (4), and a bearing (5) is placed in the end cover (8), and the bearing (5) passes through the central shaft (3), and the lower end of the bearing (5) is in contact with the upper end of a convex shoulder of the central shaft (3).
2. The device for controlling the initial torque and stroke of a spiral spring according to claim 1, characterized in that: The process of setting the initial torque of the spiral spring (11) is as follows: The coil spring assembly (1) is rotated counterclockwise through the coil spring barrel (12); the coil spring assembly (1) drives the central shaft (3) to rotate counterclockwise, the central shaft (3) drives the upper limit body (23) to rotate, the upper limit body (23) drives the uppermost middle limit body (22) to rotate through the limit teeth, and the stacked middle limit bodies (22) drive the middle limit teeth of the next layer to rotate through the limit teeth in turn, until the limit teeth of the last middle limit body (22) are engaged with the limit teeth of the lower limit body (21), and the central shaft (3) stops rotating; the coil spring assembly (1) is continued to be rotated counterclockwise, and the volute spring (11) begins to deform and generate torque; the coil spring assembly (1) is continued to be rotated to the set initial torque, the coil spring barrel (12) is kept in place, and the coil spring barrel (12) is fixed on the housing (4), completing the setting of the initial torque of the volute spring (11).
3. The device for controlling the initial torque and stroke of a spiral spring according to claim 2, wherein: The process of stroke control is: After the initial torque setting of the volute spring (11) is completed, the central shaft (3) rotates clockwise; the central shaft (3) drives the upper limit body (23) to rotate, and the limiting teeth of the upper limit body (23) drive the uppermost middle limit body (22) to rotate in the opposite direction; the stacked middle limit bodies (22) drive the middle limit teeth of the next layer to rotate in turn through the limiting teeth, until the limiting teeth of the last layer of middle limit body (22) are reversely meshed with the limiting teeth of the lower limit body (21), the central shaft (3) stops rotating, and the clockwise rotation angle of the center axis is the working stroke of the volute spring (11).
4. The device for controlling the initial torque and stroke of a spiral spring according to claim 3, wherein: The initial torque of the spiral spring (11) is controlled by the angle of the rotating spring barrel (12), and the working stroke is controlled by the number of layers of the middle limit body (22).
5. The device for controlling the initial torque and stroke of a spiral spring according to claim 1, characterized in that: The torque is provided by the spiral spring (11); the inner side of the spiral spring (11) is a bending hook, and the outer side of the spiral spring (11) is provided with a connection positioning hole.
6. The device for controlling the initial torque and stroke of a spiral spring according to claim 1, characterized in that: The inner side of the coil spring latch (13) is a nail cap structure, and the middle is a cylindrical section; a slot is passed through the middle of the nail cap and the cylindrical section, and the outer side is a circular convex shoulder flange.
7. The device for controlling the initial torque and stroke of a spiral spring according to claim 1, characterized in that: The coil spring barrel (12) is a cylindrical structure; a sunken positioning hole is opened in the middle of the outer wall of the coil spring barrel (12), and an outer hexagonal corner for loading torque is provided at the bottom end.
8. The device for controlling initial torque and stroke of a spiral spring according to claim 1, characterized in that: The upper end of the lower limit body (21) is provided with a limit tooth, and the rest of the upper end except the limit tooth portion is a smooth plane; the middle of the lower limit body (21) is a circular mounting hole, and a screw hole is left on the upper end surface.
9. The device for controlling initial torque and stroke of a spiral spring according to claim 1, characterized in that: The lower end of the middle limiting body (22) is a limiting tooth, and the upper and lower end surfaces of the limiting tooth are all smooth planes; the middle is a circular mounting hole.
10. The device for controlling initial torque and stroke of a spiral spring according to claim 1, characterized in that: The lower end of the lower limiting body (21) is a limiting tooth, and the rest of the lower end except the limiting tooth portion is a smooth plane; a guide shaft extends from the middle lower end, the middle of the guide shaft is a circular mounting hole, and a keyway is opened on the inner side of the guide shaft.
Citation Information
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