Novel spring mechanism

Abstract

The utility model discloses a novel spring mechanism which comprises a reset pull rod and a spring support, the reset pull rod is of a rod-shaped structure with a handle at the upper end, the spring support is of a U-shaped structure with a second through hole at the lower end, a spring is sleeved on the outer side of the reset pull rod after the reset pull rod penetrates through the upper end face of the spring support, and a nut is arranged at the lower end of the reset pull rod. Reinforcing ribs are arranged at the upper end of the spring support, and a bushing is arranged in the lower end. The original tension spring is changed into the pressure spring, so that the service life of the spring is greatly prolonged; the nut and the spring support are matched with the end face of the compression spring, fault point stress concentration points are reduced, and product safety is improved. One end of the spring bracket adopts the bent reinforcing rib, and the other end of the spring bracket adopts the bushing, so that the internal size of the spring bracket is fixed, the rigidity of the spring bracket is enhanced, and the service life of the mechanism is prolonged; the square nut with the opposite side length larger than the space is adopted, and under the condition that other anti-rotation measures fail, the nut cannot loosen and fail.

Description

Technical Field

[0001] The utility model relates to a novel spring mechanism and belongs to the technical field of springs. Background Art

[0002] A tension spring is a mechanical elastic element with the ability of elastic deformation. Under the action of an external force, the tension spring will deform, but when the external force disappears, the tension spring can automatically return to its original state. The tension spring is usually wound into a spiral shape by spring wire to form a spiral spring body. The two ends are respectively connected to two tension spring joints of a mechanical structure and are screwed into each other mechanically. The joints tightly connect the head and tail ends of the tension spring together to form a closed ring structure. Although the tension spring joints can connect the head and tail ends of the tension spring, in some cases, the connection may not be stable enough. Especially when subjected to a large external force or vibration, the joints may become loose or break. The material of the tension spring joints is usually the same as that of the tension spring, so it is also affected by material limitations. In some special environments, such as high temperature and high pressure environments, the material of the tension spring joints may become unstable, affecting their connection performance and service life. The processing accuracy requirements of the tension spring joints are relatively high, and the processing difficulty is relatively large. If the processing is improper, it may lead to poor fit between the joints and the tension spring, affecting their connection effect and stability. The tension spring joints are usually screwed into the tension spring by interference fit, which is easy to cause stress concentration, and usually the fracture occurs at the connection part; the service life of the tension spring is less than that of the compression spring.

[0003] A tension spring is a helical spring that bears axial tension. The forms of its hooks include side hook tension springs, long hook tension springs, British hook tension springs, German hook tension springs, semi-circular hook tension springs, duckbill hook tension springs, etc. The "hook" is used to ensure the source of the tension of the tension spring and is generally made of spring steel with a circular cross-section material. When not under load, the coils of the tension spring are generally tightly joined without gaps and work by using the resilience (tension) after stretching to control the movement of machine parts, store energy, measure the magnitude of force, etc. Most tension springs are usually under a certain degree of tension, even without any load. This initial tension determines the tightness of the tension spring coil without any load.

[0004] The structure and process characteristics of the tension spring are relatively simple. Under the action of an external force, its elasticity is not as good as that of the compression spring and it is easy to deform; the hooks of the tension spring need to be processed into a specific connection shape, which is easy to cause stress concentration, and usually the fracture occurs at the connection part; the service life of the tension spring is less than that of the compression spring.

[0005] Both of the above two schemes have the problem that the structure length of the tension spring is long, and when encountering vibration during use, there will be a jitter phenomenon, resulting in fluctuations in the tension. This fluctuation will be transmitted to the connected mechanism, causing vibration of the connected mechanism. If it is a connected signal generating mechanism, it will cause the signal point to flash and break. Content of the Utility Model

[0006] Purpose of the utility model: The purpose of the present utility model is to provide a novel spring mechanism. By changing the original tension spring design to a compression spring, the service life of the spring mechanism is greatly improved. The nut and the spring bracket are used in cooperation with the end face of the compression spring to reduce stress concentration points at fault points and improve product safety.

[0007] Technical solution: The novel spring mechanism described in the present utility model includes a reset pull rod and a spring bracket. The reset pull rod is a rod-shaped structure with a handle at the upper end. There is a first through hole on the handle. The spring bracket is a "U"-shaped structure with a second through hole at the lower end. There is a round hole on the upper end face of the spring bracket. After the reset pull rod passes through the round hole on the upper end face of the spring bracket, a spring is sleeved on the outside. A nut is provided at the lower end of the reset pull rod. The spring is located between the nut and the upper end face of the spring bracket.

[0008] Further, a reinforcing rib that bends downward is provided at the upper end of the spring bracket. The reinforcing rib fixes the upper end of the spring, and the length of the spring in the relaxed state just touches the front nut.

[0009] Furthermore, the inner length of the reinforcing rib is the same as the outer side length of the nut, and the length of the space diagonal formed by the two side edges of the spring bracket and the reinforcing rib is greater than the diagonal length of the nut.

[0010] Further, a core filling is provided inside the lower end of the spring bracket.

[0011] Furthermore, the height of the core filling is 13 - 14.5 mm.

[0012] Further, both the core filling and the spring bracket are made of carbon structural steel.

[0013] Further, the nut is made of stainless steel.

[0014] Further, the spring is made of spring steel wire.

[0015] Further, the nut is of a square structure.

[0016] Further, the reset pull rod is a stainless steel rod with a length of 150 - 155 mm and a diameter of 7.8 - 8.2 mm. The length of the upper end handle is 25 - 30 mm and the diameter is 13.5 - 14.5 mm.

[0017] Further, the diameters of both the first through hole and the second through hole are 7.8 - 8.2 mm.

[0018] Further, the length of the spring bracket is 27 - 130 mm, and its upper end face is a square structure with a side length of 18 x 18 mm.

[0019] Beneficial effects: Compared with the prior art, the present utility model has the following advantages:

[0020] (1) The present utility model changes the original tension spring design to a compression spring, greatly improving the service life of the spring mechanism; uses a nut and a spring bracket to cooperate with the end face of the compression spring, reducing stress concentration points at fault points and improving product safety;

[0021] (2) To ensure the movement space of the compression spring, the present utility model uses a bent reinforcing rib at one end of the spring bracket and a core filling at the other end, fixing the internal dimensions of the spring bracket and also strengthening the stiffness of the spring bracket, improving the service life of the mechanism;

[0022] (3) The present utility model uses a square nut with a side length greater than the space, so that the nut will not loosen and fail even when other anti-rotation measures fail. Description of the Drawings

[0023] Figure 1 is a schematic side structure diagram of the new spring mechanism;

[0024] Figure 2 is an enlarged partial view of the reinforcing rib;

[0025] Figure 3 is an enlarged partial view of the core filling;

[0026] Figure 4 is a schematic three-dimensional structure diagram of the new spring mechanism;

[0027] Figure 5 is a schematic cross-sectional structure diagram of the nut. Detailed Implementation Modes

[0028] The technical solutions of the present utility model will be further described below with reference to the drawings.

[0029] Embodiment 1

[0030] As Figure 1 shown, a new spring mechanism of the present utility model includes a reset pull rod 1 and a spring bracket 5. The reset pull rod 1 is a rod-shaped structure with a handle at the upper end, and a first through hole is provided on the handle. The spring bracket 5 is a "U"-shaped structure with a second through hole at the lower end. A round hole is provided on the upper end face of the spring bracket 5. After the reset pull rod 1 passes through the round hole on the upper end face of the spring bracket 5, a spring 2 is sleeved on the outside. A nut 3 is provided at the lower end of the reset pull rod 1. The spring 2 is located between the nut 3 and the upper end face of the spring bracket 5.

[0031] As Figures 2 - 4 shown, a downwardly bent reinforcing rib 6 is provided at the upper end of the spring bracket 5, and a core filling 4 is provided inside the lower end of the spring bracket 5. The reinforcing rib 6 strengthens and fixes the upper end of the spring 2, and the length of the spring 2 in the relaxed state just touches the front nut 3.

[0032] As Figure 5As shown, the nut 3 has a square structure. The internal length B of the reinforcing rib 6 is the same as the outer side length of the nut 3. The length of the space diagonal A formed by the two side edges of the spring bracket 5 and the reinforcing rib 6 is greater than the diagonal of the square nut 3.

[0033] The reset pull rod 1 is a stainless steel rod with a length of 150 mm and a diameter of 8 mm. The length of the handle is 30 mm and the diameter is 14 mm. The diameter of the first through hole on the handle is 8 mm.

[0034] The spring bracket 5 has a length of 130 mm. Its upper end face is a square structure with a side length of 18x18 mm. The diameter of the second through hole on the spring bracket 5 is 8 mm. The height of the bush 4 is 14 mm.

[0035] Both the bush 4 and the spring bracket 5 are made of carbon structural steel. The nut 3 is made of stainless steel. The spring 2 is made of spring steel wire.

[0036] Working mechanism:

[0037] Fix the first through hole and the second through hole of the above-mentioned new spring mechanism to other mechanisms respectively. When the side length of the distance between the fixed ends is set, the above-mentioned new spring mechanism can provide an inward tightening force.

Claims

1. A new spring mechanism, characterized in that: The invention comprises a reset pull rod (1) and a spring bracket (5). The reset pull rod (1) is a rod-shaped structure with a handle at the upper end, and the handle is provided with a first through hole. The spring bracket (5) is a "U"-shaped structure with a second through hole at the lower end. A round hole is provided on the upper end surface of the spring bracket (5). After the reset pull rod (1) passes through the round hole on the upper end surface of the spring bracket (5), a spring (2) is sleeved on the outer side. A nut (3) is provided at the lower end of the reset pull rod (1), and the spring (2) is located between the nut (3) and the upper end surface of the spring bracket (5).

2. The novel spring mechanism according to claim 1 is characterized in that: The upper end of the spring bracket (5) is provided with a downwardly bent reinforcing rib (6), which fixes the upper end of the spring (2). When the spring (2) is in a relaxed state, the length thereof just contacts the nut (3) at the front end.

3. The novel spring mechanism according to claim 2 is characterized in that: The length (B) of the reinforcing rib (6) is consistent with the side length of the nut (3), and the length of the spatial diagonal (A) formed by the two side edges of the spring bracket (5) and the reinforcing rib (6) is greater than the diagonal length of the nut (3).

4. The novel spring mechanism according to claim 1 is characterized in that: A bushing (4) is provided inside the lower end of the spring bracket (5).

5. The novel spring mechanism according to claim 4 is characterized in that: The height of the bushing (4) is 13-14.5 mm.

6. The novel spring mechanism according to claim 4 is characterized in that: The bushing (4) and the spring bracket (5) are both made of carbon structural steel, the nut (3) is made of stainless steel, and the spring (2) is a spring steel wire.

7. The novel spring mechanism according to any one of claims 1 to 6, characterized in that: The nut (3) is a square structure.

8. The novel spring mechanism according to any one of claims 1 to 6, characterized in that: The reset pull rod (1) is a stainless steel rod with a length of 150-155 mm and a diameter of 7.8-8.2 mm. The length of the upper handle is 25-30 mm and the diameter is 13.5-14.5 mm.

9. The novel spring mechanism according to any one of claims 1 to 6, characterized in that: The diameters of the first through hole and the second through hole are both 7.8-8.2 mm.

10. The novel spring mechanism according to any one of claims 1 to 6, characterized in that: The length of the spring bracket (5) is 127-130 mm, and its upper end surface is a square structure with a side length of 18x18 mm.

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