Starting coil spring

Abstract

The utility model discloses a starting coil spring which comprises a coil spring body, an outer hook is arranged at the outer side end of the coil spring body, the starting coil spring further comprises a limiting assembly, the limiting assembly comprises a tension band, and a fastening part is arranged on the outer side of the tension band; the positioning assembly comprises a sleeve, the inner side end of the coil spring body is connected to the side of the sleeve in a penetrating mode, a locking part is arranged on the side of the sleeve, a positioning bolt is connected to the front face of the sleeve in a penetrating mode, and a springback part is arranged on the outer side of the positioning bolt; according to the utility model, the positioning bolt in the positioning assembly at the inner side end of the coil spring body is used for fixing the sleeve and the part, which needs to be installed, of the starting coil spring in a threaded manner, and the inner side end of the coil spring body is fixed with the sleeve through the locking part; by means of the fixing mode, the fixing stability of the coil spring body is improved, and the problem that after being used for a long time, the coil spring inner hook fixed to the support in a penetrating and inserting mode is prone to loosening and falling off is solved.

Description

Technical Field

[0001] The utility model relates to the field of coil springs, in particular to a starting coil spring. Background Art

[0002] A starting coil spring is a flat spiral spring that can continuously provide a large restoring force in a narrow space. It is mainly made of spring steel strip and stores and releases energy through the twisting or rotation of elastic materials. It is used in the mechanical field. The design of the starting coil spring enables it to output a large torque when wound up, while when approaching full relaxation, the torque will decrease significantly. Generally, the inner end of the existing starting coil spring is provided with an inner hook, and the inner hook is inserted into the bracket at the equipment installation position to limit and fix the position of the starting coil spring. However, after long-term use, the insertion part between the inner hook of the starting coil spring and the bracket is prone to looseness and detachment, affecting the stability of the starting coil spring. To solve this problem, therefore, a new type of starting coil spring is needed. Content of the Utility Model

[0003] The purpose of the utility model is to provide a starting coil spring to solve the problems put forward in the above background art.

[0004] To achieve the above purpose, the utility model provides the following technical scheme: A starting coil spring, including a coil spring body, an outer hook is arranged at the outer side end of the coil spring body, and further includes:

[0005] A limiting component, which is used for limiting before the installation of the outer hook. The limiting component includes a hoop, and a fastening part is arranged on the outer side of the hoop;

[0006] A positioning component, which is used for fixing the coil spring body. The positioning component includes a sleeve, the inner side end of the coil spring body is inserted and connected to the side of the sleeve, a locking part for fixing the inner side end of the coil spring body is arranged on the side of the sleeve, a positioning bolt is inserted and connected to the front of the sleeve, and a spring-back part is arranged on the outer side of the positioning bolt.

[0007] Preferably, the locking part includes a fixing piece arranged at the inner side end of the coil spring body. The end of the fixing piece is inserted and connected to the bottom of the sleeve, and a locking bolt for positioning the fixing piece is inserted and connected to the side of the sleeve.

[0008] Preferably, a convex groove for the insertion of the fixing piece is formed on the side of the sleeve.

[0009] Preferably, a locking nut is arranged at the insertion part of the locking bolt and the inner wall of the convex groove, and the locking nut is used for fixing the locking bolt.

[0010] Preferably, the spring-back part includes a compression spring, the compression spring is sleeved on the outer side of the positioning bolt, and the compression spring is used for providing a pre-tightening force to prevent the positioning bolt from loosening.

[0011] Preferably, an activity groove for placing a compression spring is provided at the end of the sleeve.

[0012] Preferably, the fastening portion includes a screw rod column, an internally threaded sleeve is sleeved outside the screw rod column, one end of the screw rod column is fixedly connected to one end of the hoop, and the end of the internally threaded sleeve is fixedly connected to the other end of the hoop.

[0013] Preferably, grooves for increasing the friction force are provided around the screw rod column.

[0014] Technical effects and advantages of the present utility model:

[0015] In the present utility model, a positioning component is provided at the inner end of the coil spring body. The sleeve and the installation position where the starting coil spring needs to be installed are threadedly fixed by using the positioning bolt in the positioning component. The inner end of the coil spring body is fixed to the sleeve through the locking portion. Compared with directly arranging an inner hook at the inner end of the coil spring to penetrate and snap-fix the coil spring body, this fixing method increases the stability of the coil spring body fixing and avoids the problem that the inner hook of the coil spring inserted and fixed to the bracket is likely to become loose and fall off after long-term use. Description of the drawings

[0016] Figure 1 It is one of the overall structural schematic diagrams of the present utility model.

[0017] Figure 2 It is the second overall structural schematic diagram of the present utility model.

[0018] Figure 3 It is the sectional view of the positioning component of the present utility model.

[0019] Figure 4 It is the sectional view of the sleeve of the present utility model.

[0020] Figure 5 It is the sectional view of the fastening portion of the present utility model.

[0021] In the figure: 1, coil spring body; 101, outer hook; 102, fixing piece; 2, sleeve; 201, locking bolt; 2011, locking nut; 202, convex groove; 203, activity groove; 3, positioning bolt; 301, compression spring; 4, hoop; 401, screw rod column; 402, internally threaded sleeve. Specific implementation manners

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0023] The present utility model provides a starting coil spring as Figures 1-5 shown, which includes a coil spring body 1. An outer hook 101 is provided at the outer end of the coil spring body 1, and further includes a limiting component and a positioning component;

[0024] The limiting component is used for limiting before the installation of the outer hook 101. The limiting component includes a hoop 4, and a fastening portion is provided on the outer side of the hoop 4;

[0025] Specifically, the fastening portion includes a screw rod column 401. An internal thread sleeve 402 is sleeved on the outer side of the screw rod column 401. One end of the screw rod column 401 is fixedly connected to one end of the hoop 4, and one end of the internal thread sleeve 402 is fixedly connected to the other end of the hoop 4.

[0026] It should be noted that a groove for increasing friction is circumferentially provided on the outer side of the screw rod column 401. The screw rod column 401 facilitates the manual rotation of it with the internal thread sleeve 402. The ends of the screw rod column 401, the internal thread sleeve 402, and the hoop 4 are all fixed by welding. By tightening and fixing the screw rod column 401 and the internal thread sleeve 402, the coil spring body 1 is limited to avoid looseness before the installation of the coil spring. After the installation of the coil spring body 1 is completed, the screw rod column 401 and the internal thread sleeve 402 can be unlocked, and then the hoop 4 can be removed;

[0027] Specifically, the positioning component is used for fixing the coil spring body 1. The positioning component includes a sleeve 2. The inner end of the coil spring body 1 is inserted and connected to the side of the sleeve 2. A positioning bolt 3 is inserted and connected to the front of the sleeve 2, and a locking portion for fixing the inner end of the coil spring body 1 is provided on the side of the sleeve 2;

[0028] It should be noted that the sleeve 2 is made of polypropylene material, and the sleeve 2 is a columnar structure;

[0029] Specifically, the locking portion includes a fixing piece 102 provided at the inner end of the coil spring body 1. The end of the fixing piece 102 is inserted and connected to the bottom of the sleeve 2, and a locking bolt 201 for positioning the fixing piece 102 is inserted and connected to the side of the sleeve 2;

[0030] It should be noted that a convex groove 202 for the insertion of the fixing piece 102 is provided on the side of the sleeve 2. The fixing piece 102 is fixedly connected to the inner end of the coil spring body 1. The fixing piece 102 is inserted from the convex groove 202 at the bottom of the sleeve 2, so as to perform the preliminary positioning of the inner end of the coil spring body 1;

[0031] Specifically, a locking nut 2011 is provided at the insertion part of the locking bolt 201 and the inner wall of the convex groove 202, and the locking nut 2011 is used to fix the locking bolt 201;

[0032] It should be noted that a hexagonal groove for the insertion of the locking nut 2011 is provided on the inner wall of the convex groove 202. The groove wall of the hexagonal groove is adhesively fixed to the outer side of the locking nut 2011. A cylindrical hole for the insertion of the locking bolt 201 is provided on the side of the fixing piece 102. By using the combination of the locking bolt 201 and the locking nut 2011, the inner end of the coil spring body 1 is fixed and limited;

[0033] A resilient portion is provided on the outer side of the positioning bolt 3;

[0034] Specifically, the resilient portion includes a compression spring 301. The compression spring 301 is sleeved on the outer side of the positioning bolt 3, and the compression spring 301 is used to provide a pre-tightening force to prevent the positioning bolt 3 from loosening;

[0035] It should be noted that a movable groove 203 for placing the compression spring 301 is provided at the end of the sleeve 2. The compression spring 301 provides a pre-tightening force in the compressed state, which can help maintain the position of the positioning bolt 3 and prevent the threaded connection from loosening by itself. Moreover, this pre-tightening force can also reduce the gap between the bolt thread and the screw hole and improve the tightness of the threaded connection;

[0036] In the actual use process, by providing a positioning assembly at the inner end of the coil spring body 1, the sleeve 2 and the installation part where the starting coil spring needs to be installed are threadedly fixed by using the positioning bolt 3 in the positioning assembly. Among them, the inner end of the coil spring body 1 and the sleeve 2 are fixed by a locking portion. Compared with directly setting an inner hook at the inner end of the coil spring to insert and snap-fix the coil spring body 1, this fixing method increases the stability of the fixing of the coil spring body 1 and avoids the situation that the inner hook of the coil spring inserted and fixed with the bracket is likely to loosen and fall off from the insertion part of the bracket after long-term use.

[0037] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A starting coil spring, comprising a coil spring body (1), wherein an outer end of the coil spring body (1) is provided with an outer hook (101), characterized in that: Also includes: A limiting assembly, the limiting assembly being used to limit the position of the outer hook (101) before installation, the limiting assembly comprising a hoop (4), and a fastening portion is arranged on the outer side of the hoop (4); A positioning assembly, the positioning assembly is used to fix a coil spring body (1), the positioning assembly comprises a sleeve (2), the inner end of the coil spring body (1) is inserted and connected to the side of the sleeve (2), the side of the sleeve (2) is provided with a locking portion for fixing the inner end of the coil spring body (1), the front side of the sleeve (2) is inserted and connected with a positioning bolt (3), and the outer side of the positioning bolt (3) is provided with a rebound portion.

2. A starting coil spring according to claim 1, characterized in that: The locking portion comprises a fixing plate (102) arranged at the inner end of the coil spring body (1), the end of the fixing plate (102) being inserted and connected to the bottom of the sleeve (2), and the side of the sleeve (2) being inserted and connected with a locking bolt (201) for positioning the fixing plate (102).

3. A starting coil spring according to claim 2, characterized in that: The side of the sleeve (2) is provided with a convex groove (202) for the fixing sheet (102) to be inserted.

4. A starting coil spring according to claim 3, characterized in that: A locking nut (2011) is provided at the point where the locking bolt (201) and the inner wall of the convex groove (202) intersect each other, and the locking nut (2011) is used to fix the locking bolt (201).

5. A starting coil spring according to claim 1, characterized in that: The resilient portion comprises a compression spring (301), the compression spring (301) being sleeved on the outside of the positioning bolt (3), and the compression spring (301) being used to provide a pre-tightening force to prevent the positioning bolt (3) from loosening.

6. A starting coil spring according to claim 2, characterized in that: The end of the sleeve (2) is provided with a movable groove (203) for accommodating a compression spring (301).

7. A starting coil spring according to claim 1, characterized in that: The fastening portion includes a screw column (401), the outer side of the screw column (401) is sleeved with an internal thread sleeve (402), the end of the screw column (401) is fixedly connected to one end of the hoop (4), and the end of the internal thread sleeve (402) is fixedly connected to the other end of the hoop (4).

8. A starting coil spring according to claim 7, characterized in that: The outer side of the screw column (401) is surrounded by a groove for increasing friction.

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