Bidirectionally adjustable flat spiral spring and production process thereof
By using a single coil spring profile to form the first and second spring wires in the opposite direction in a narrow space, and combining bending treatment and coil spring ferrule, the existing scroll springs are solved in design difficulties and unidirectional torsion in a narrow space, and bidirectional adjustment and buffering are achieved, reducing costs.
Patent Information
- Application Number
- CN202510086662.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-20
- Publication Date
- 2025-05-06
AI Technical Summary
The existing scroll springs are difficult to design in a narrow space, have high development costs, and can only achieve one-way torsional force output, which cannot meet the bidirectional adjustment requirements.
A single coil spring profile is used to wind the first spring wire and the second spring wire with opposite directions from the middle to both ends, and bending is performed on the outer end to form a torsion hook, combining the coil spring ferrule and an arc-shaped transition section to achieve bidirectional torsion adjustment and buffering.
The two-way transmission and buffering effect in a limited space is realized, providing bidirectional torque value output, reducing development and production costs, and improving the stability of the coil spring.
Smart Images
Figure CN119934178A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of spring forming, and in particular to a bidirectionally adjustable plane scroll spring and a production process thereof. Background Art
[0002] In a small space, due to limited design space, the existing volute spring needs to be realized by connecting two springs in parallel, and the development and manufacturing costs are relatively high. In addition, the existing volute spring can only achieve unidirectional torsion to achieve force output.
[0003] Therefore, it is urgent to produce a bidirectionally adjustable planar volute spring. Summary of the invention
[0004] The object of the present invention is to provide a bidirectionally adjustable planar spiral spring and a production process thereof, so as to realize the bidirectional transmission and buffering effect of the spiral spring in a limited space.
[0005] In order to achieve the above object, the technical solution adopted by the present invention is: A first aspect of the present invention provides a bidirectionally adjustable planar spiral spring, comprising: First spring wire; A second spring wire, wherein the second spring wire and the first spring wire are formed by winding a single coil spring profile from the middle to both ends in opposite directions; A twist hook, wherein the twist hook is bent and formed at the outer ends of the first spring wire and the second spring wire; A coil spring ring is formed between the first spring wire and the second spring wire, and the first spring wire and the second spring wire are alternately connected to the coil spring ring.
[0006] Furthermore, an arc-shaped transition portion extending toward the spring wire is formed at the connection between the coil spring ring and the first spring wire and the second spring wire.
[0007] Furthermore, the single coil spring profile is wide in the middle and narrow at two sides.
[0008] Furthermore, the first spring wire and the second spring wire are integrally connected.
[0009] Furthermore, the first spring wire and the second spring wire each include a plurality of vortex turns.
[0010] Further, the number of the vortices of the first spring wire is the same as / different from the number of the vortices of the second spring wire.
[0011] A second aspect of the present invention provides a production process for a bidirectionally adjustable planar volute spring, comprising the following steps: S1 stamping and blanking: stamping the raw material into a number of coil spring profiles with a wide middle and narrow sides, and the narrow parts on the two sides are staggered and connected with the wide middle part; S2 preforming inner circle: placing the coiled spring profile on a folding and rolling machine, and winding the middle wide part of the coiled spring profile for one circle for preforming; S3 spring winding: on the basis of step S2, continue to wind the coil spring profile from the middle to both ends in opposite directions one by one to form a first spring wire and a second spring wire, and simultaneously bend the outer ends of the first spring wire and the second spring wire to form a twisted hook; S4 heat treatment: heat treating the molded part obtained in step S3; S5: grinding the outer hook: grinding the twisted hook in the molded part obtained in step S3; S6: Oiling and packaging: The molded parts in step S5 are oiled and packaged.
[0012] Furthermore, in step S4, the heat treatment temperature is 800-900° C., and the heat treatment time is 30-50 min.
[0013] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: The present invention utilizes a single coil spring profile to be wound in opposite directions from the middle to both ends to form a first spring wire and a second spring wire in opposite directions, and the outer ends of the first spring wire and the second spring wire are bent to form a torsion hook. The single coil spring profile is used to achieve bidirectional torsion adjustment buffering and bidirectional torque value output, which saves development costs and production costs to a certain extent.
[0014] Furthermore, by providing an arcuate transition portion extending in the direction of the spring wire at the connection between the coil spring ring and the first spring wire and the second spring wire, the first spring wire and the second spring wire are prevented from breaking when the coil spring is bent, thereby ensuring the stability of the coil spring operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings: Figure 1 It is a schematic structural diagram of a bidirectionally adjustable planar scroll spring provided in the present invention; Figure 2 It is a schematic structural diagram of a single coil spring profile provided in the present invention; Figure 3 It is a structural schematic diagram of the coil spring provided in the present invention during operation; Figure 4The present invention provides a process flow chart for producing a bidirectionally adjustable planar spiral spring; The reference numerals are as follows: 1. first spring wire; 2. second spring wire; 3. twist hook; 4. coil spring ring; 401. arc-shaped transition part; 5. vortex ring; 6. coiling seat; 7. sleeve rod; 8. extrusion wheel. DETAILED DESCRIPTION
[0016] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0017] See also Figure 1 and Figure 2 In an embodiment of the present invention, a bidirectionally adjustable planar spiral spring is provided, and the planar spiral spring includes a first spring wire 1, a second spring wire 2, a torsion hook 3 and a coil spring ring 4.
[0018] Specifically, the first spring wire 1 and the second spring wire 2 are integrally connected. More specifically, in actual production, a single coiled spring profile is used in the embodiment of the present invention to be coiled from the middle to both ends in opposite directions, that is, the coiling directions of the first spring wire 1 and the second spring wire 2 are opposite, thereby making the forces of the first spring wire 1 and the second spring wire 2 opposite. In specific use, it can play a role of bidirectional transmission and buffering, and can also provide a larger torque value output.
[0019] In the embodiment of the present invention, the outer ends of the first spring wire 1 and the second spring wire 2 are simultaneously bent to form a torsion hook 3, and the torsion hook 3 on the first spring wire 1 is arranged opposite to the torsion hook 3 on the second spring wire 2. In addition, the bending force of the bending process can be reasonably adjusted according to actual production needs in practice.
[0020] In the embodiment of the present invention, a coil spring ferrule 4 is formed between the first spring wire 1 and the second spring wire 2, and the first spring wire 1 and the second spring wire 2 are staggered and connected to the coil spring ferrule 4, thereby forming a coil spring profile that is wide in the middle and narrow on both sides. In addition, an arc-shaped transition portion 401 extending in the direction of the spring wire is formed at the connection between the coil spring ferrule 4 and the first spring wire 1 and the second spring wire 2. The design of the arc-shaped transition portion 401 can prevent the corresponding coil spring stress from being concentrated on the coil spring ferrule 4 during the coil spring operation, thereby causing the connection between the coil spring ferrule 4 and the first spring wire 1 and the second spring wire 2 to break, thereby affecting the coil spring operation.
[0021] In addition, from Figure 1It can be seen that the first spring wire 1 and the second spring wire 2 both include a plurality of vortex coils 5. When the first spring wire 1 and the second spring wire 2 are wound, a plurality of vortex coils 5 are formed. As for the number of vortex coils 5, the number of vortex coils 5 of the first spring wire 1 and the number of vortex coils 5 of the second spring wire 2 can be the same or different, that is, during winding, the number of vortex coils 5 to be wound can be selected according to actual needs.
[0022] Regarding how to produce the above-mentioned bidirectionally adjustable planar spiral spring, the embodiment of the present invention provides a related production process, see Figure 3 and Figure 4 , specifically, comprising the following steps: S1 stamping and blanking: stamping the raw material into a number of coil spring profiles with a wide middle and narrow sides, and the narrow parts on the two sides are staggered and connected with the wide middle part; S2 Preforming inner circle: Place the coiled spring profile on the folding and rolling machine, and wind the middle wide part of the coiled spring profile once for preforming; S3 spring winding: on the basis of step S2, continue to wind the coil spring profile from the middle to both ends in opposite directions one by one to form a first spring wire 1 and a second spring wire 2, and simultaneously bend the outer ends of the first spring wire 1 and the second spring wire 2 to form a twist hook 3; S4 heat treatment: heat treating the molded part obtained in step S3; S5: grinding the outer hook: grinding the twist hook 3 in the molded part obtained in step S3; S6: Oiling and packaging: The molded parts in step S5 are oiled and packaged.
[0023] With respect to the above steps, in step S1, the raw material is punched into a coil spring profile with uniform size by a punching machine. In the embodiment of the present invention, the specific size during punching is determined according to the actual production situation.
[0024] In step S2, preforming the inner circle can reduce the deformation of the coil spring profile during the scroll process, making the inner diameter of each vortex 5 more accurate during the rolling process, thereby ensuring the assembly and use performance of the planar scroll spring. In addition, preforming the inner circle helps to reduce the stress concentration of the material during bending and torsion, thereby improving the fatigue life and reliability of the planar scroll spring.
[0025] In step S3, when the coil spring profile is wound one by one from the middle to the two ends in opposite directions, it is necessary to pay attention to the size of the upper and lower gaps and the gap between the vortex coils 5 to ensure the winding quality. During the specific winding, the profile sleeved on the sleeve rod 7 gives the winding seat 6 corresponding rotational power by means of an external driving force. Under the rotation of the winding seat 6, the first spring wire 1 and the second spring wire 2 are driven to rotate. Further, the first spring wire 1 is squeezed by the extrusion wheel 8 on the periphery of the sleeve rod 7, so that the first spring wire 1 is wound and formed during the rotation process. At this time, the second spring wire 2 is not wound, but only rotated. After the first spring wire 1 is wound and formed, the rolled profile is taken out of the sleeve rod 7, turned upside down, and then re-inserted into the sleeve rod 7. Then, the same method is used to extrude the second spring wire 2 during the rotation process using the extrusion wheel 8, so that the second spring wire 2 is wound and formed.
[0026] In step S4, the internal stress of the coil spring formed part is eliminated by heat treatment, and the strength, toughness and fatigue resistance of the formed part are increased by improving the internal microstructure of the material itself. Specifically, the heat treatment temperature is 860°C and the heat treatment time is 40 minutes.
[0027] The planar spiral spring obtained by the above-mentioned production process uses a single coil spring profile to be wound from the middle to both ends in opposite directions to form a first spring wire 1 and a second spring wire 2 in opposite directions, and the outer ends of the first spring wire 1 and the second spring wire 2 are bent to form a torsion hook 3. A single coil spring profile is used to achieve bidirectional torsion adjustment buffering and bidirectional torque value output, which saves development costs and production costs to a certain extent.
[0028] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the contents of the present invention and implement them accordingly. They cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.
Claims
1. A bidirectionally adjustable planar spiral spring, characterized in that: include: A first spring wire (1); A second spring wire (2), wherein the second spring wire (2) and the first spring wire (1) are formed by winding a single coil spring profile from the middle to both ends in opposite directions; A twist hook (3), the twist hook (3) being bent and formed at the outer ends of the first spring wire (1) and the second spring wire (2); A coil spring ring (4), wherein the coil spring ring (4) is formed between the first spring wire (1) and the second spring wire (2), and the first spring wire (1) and the second spring wire (2) are alternately connected to the coil spring ring (4).
2. A bidirectionally adjustable planar spiral spring according to claim 1, characterized in that: An arc-shaped transition portion (401) extending in the direction of the spring wire is formed at the connection between the coil spring ring (4) and the first spring wire (1) and the second spring wire.
3. The bidirectionally adjustable planar spiral spring according to claim 1, characterized in that: The single coil spring profile is wide in the middle and narrow at two sides.
4. The bidirectionally adjustable planar spiral spring according to claim 1, characterized in that: The first spring wire (1) and the second spring wire (2) both include a plurality of vortex turns (5).
5. A bidirectionally adjustable planar spiral spring according to claim 4, characterized in that: The number of the vortices (5) of the first spring wire (1) is the same as / different from the number of the vortices (5) of the second spring wire (2).
6. A process for producing a bidirectionally adjustable planar spiral spring according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1 stamping and blanking: stamping the raw material into a number of coil spring profiles with a wide middle and narrow sides, and the narrow parts on the two sides are staggered and connected with the wide middle part; S2 preforming inner circle: placing the coiled spring profile on a folding and rolling machine, and winding the middle wide part of the coiled spring profile for one circle for preforming; S3 spring winding: on the basis of step S2, continue to wind the coiled spring profile from the middle to both ends in opposite directions one by one to form a first spring wire (1) and a second spring wire (2), and simultaneously bend the outer ends of the first spring wire (1) and the second spring wire (2) to form a twisted hook (3); S4 heat treatment: heat treating the molded part obtained in step S3; S5: grinding the outer hook: grinding the twist hook (3) in the molded part obtained in step S3; S6: Oiling and packaging: The molded parts in step S5 are oiled and packaged.
7. A process for producing a bidirectionally adjustable planar spiral spring according to claim 6, characterized in that: In step S4, the heat treatment temperature is 800-900° C., and the heat treatment time is 30-50 min.