Fastening device for assembling spring on screw

Abstract

The utility model relates to the technical field of connecting parts, in particular to a fastening device for assembling a spring on a screw. Comprising a screw body composed of a screw rod and a cap head, an annular groove concentric with the screw rod is formed in the lower end of the cap head, a plurality of clamping assemblies are evenly distributed and fixed to the inner circumference of the annular groove, the screw rod is sleeved with a spring, the diameter of the upper end and the diameter of the lower end of the spring are larger than the diameter of the middle of the spring, and the diameters of the two ends of the spring are equal; one end of the spring in the annular groove is clamped by the multiple clamping assemblies, and the middle of the spring makes contact with the outer edge of the screw. According to the utility model, one end of the spring close to the cap head of the screw body is clamped and fixed by the plurality of clamping components, so that the processing cost is low, and the strength and tensile property of the screw body can be ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to a connecting part technical field, concretely relates to a fastening device of screw assembly spring. BACKGROUND

[0002] Spring screw is a kind of mould accessories, mostly by spring of screw outside set up, its spring and screw can still be movable after assembling, the spring of existing spring screw is directly set up on the screw rod of screw, and the screw is easy to separate from the spring, when using spring screw, the spring needs to be set up on the screw rod of screw, and it is more troublesome to use.

[0003] In order to solve the above problems, the patent file with publication number CN215720065U discloses a fastening device of screw assembly spring, which comprises: a screw cover, a screw is installed at the bottom of the screw cover, and a second spring is sleeved outside the screw; a guide sleeve, limit holes are formed at the top and bottom of the guide sleeve, a sealing ring is arranged in the limit hole at the top, and a protruding block is arranged in the limit hole at the bottom; a clamping assembly, receiving grooves are formed at the bottom of both ends of the screw, the clamping assembly is hinged in the receiving groove, the clamping assembly comprises a stop block, a second guide slide plate is installed at one end of the inner wall of the stop block, the second guide slide plate is slidably connected with a moving plate at the other end, rotating plates are hinged on both sides of the moving plate, and a spring clamp is arranged at the top of the rotating plate.

[0004] When the second spring needs to be fixed in the transportation engineering, the user sets the second spring outside the screw, and moves the pressing plate downward at the same time, the pressing plate drives the moving plate to slide downward outside the second guide slide plate, the moving plate drives one end of the rotating plate to move downward while descending, the rotating plate moves to the end close to each other, the rotating plate is detached from the positioning slot of the screw, and enters the inside of the stop block through the guide holes on both sides of the stop block; At this time, the rotating plate does not contact the screw, the stop block rotates unrestrictedly, the stop block unfolds from the receiving groove of the screw, and the second spring is limited and fixed by the limiting slot of the stop block; At the same time, the stop block does not contact the connecting plate, the first spring rebounds to drive the connecting plate to slide to the end away from each other, the connecting plate drives the clamping block to move, the clamping block slides out of the ejection hole of the screw, one end of the top of the clamping block is attached to the second spring, and the second spring is fixed by the cooperation of the stop block and the clamping block. The above-mentioned scheme is used to fix the second spring, which needs to over-process the screw, needs to process the positioning slot on the screw, the processing cost is high, and the strength and tensile capacity of the screw are reduced. SUMMARY

[0005] The utility model discloses a main purpose lies in providing a kind of fastening device of screw assembly spring, can avoid spring and screw automatic separation, can guarantee the strength and tensile capacity of screw.The technical scheme provided by the utility model in order to realize the above-mentioned purpose is:

[0006] A kind of fastening device of screw assembly spring, including the screw body being made of screw rod and cap head, the ring groove concentric with screw rod is set in the lower end of cap head, multiple clamping components are fixed in the circumferential of ring groove, spring is set on screw rod, the diameter of the upper and lower ends of spring is greater than the diameter of spring middle part, the diameter of the upper and lower ends of spring is equal, one end of spring is located in ring groove, one end of spring in ring groove is clamped by multiple clamping components, and spring middle part is in contact with the outer edge of screw rod.

[0007] Specifically, the clamping component has elasticity.

[0008] Specifically, the clamping component includes a clamping portion fixed in the ring groove, a guide portion is fixed on the free end of the clamping portion, the guide portion is arc-shaped protruded towards the center of the screw rod at the middle position, and one end of the spring in the ring groove is located inside the multiple clamping portions.

[0009] Specifically, the clamping portion is fixed at the groove bottom of the ring groove.

[0010] Specifically, the clamping component is made of elastic steel sheet.

[0011] Specifically, the clamping portion and the guide portion are integrally formed, and the clamping portion is welded and fixed at the groove bottom of the ring groove.

[0012] Specifically, the clamping component includes an inner block fixed in the ring groove, one end of the spring in the ring groove is located inside the multiple inner blocks, an arc-shaped protruding block is fixed at the end of the inner block towards the center of the screw rod, and one end of the spring in the ring groove is located below the protruding block.

[0013] Specifically, the protruding block and the inner block are integrally formed, and the inner block is welded and fixed in the ring groove.

[0014] Compared with the prior art, the utility model has the beneficial effects that:

[0015] 1. One end of the spring near the cap head of the screw body is clamped and tightly fixed by multiple clamping components, the processing cost is low, and the strength and tensile performance of the screw body can be guaranteed.

[0016] 2. The diameter of the upper and lower ends of the spring is greater than the diameter of the middle part of the spring, and the diameter of the upper and lower ends of the spring is equal, so when the spring is assembled onto the screw body, it is not necessary to confirm the assembly end towards the ring groove, the spring can be directly assembled, and the assembly efficiency can be improved.

[0017] 3. Since the diameters at both ends of the spring are larger than the diameter at the middle of the spring, the annular groove can be far away from the screw when machining the annular groove, making it convenient to cut the annular groove with the cap head. When welding the retaining component in the annular groove, the welding torch has enough space to lower, making it convenient to weld and fix the retaining component in the annular groove.

[0018] 4. Because the middle of the spring contacts the outer edge of the screw, the vibration amplitude of the spring can be reduced during transportation, thus preventing the spring from separating from the screw body. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the present invention.

[0020] Figure 2 This is a top view of one end of the spring inside the retaining ring groove of the retaining part.

[0021] Figure 3 for Figure 2 Sectional view along line AA.

[0022] Figure 4 for Figure 3 A magnified view of region B in the middle.

[0023] Figure 5 This is a schematic diagram showing the interaction between the inner block and the protrusion.

[0024] The parts in the attached diagram are named as follows: 1. Screw, 2. Cap, 3. Ring groove, 4. Clamping assembly, 401. Guide part, 402. Clamping part, 403. Inner block, 404. Protrusion, 5. Spring. Detailed Implementation

[0025] 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.

[0026] Example 1: Refer to Figures 1-4 As shown, a fastening device for screw and spring assembly includes a screw body consisting of a screw 1 and a cap 2. The lower end of the cap 2 has an annular groove 3 concentric with the screw 1. Multiple clamping components 4 are evenly distributed and fixed in the annular groove 3. A spring 5 is sleeved on the screw 1. The diameter of the upper and lower ends of the spring 5 is larger than the diameter of the middle part of the spring 5. The diameters of the two ends of the spring 5 are equal. One end of the spring 5 is located in the annular groove 3. One end of the spring 5 in the annular groove 3 is clamped by the multiple clamping components 4. The middle part of the spring 5 is in contact with the outer edge of the screw 1.

[0027] Since the middle part of the spring 5 is in contact with the outer edge of the screw 1, the vibration amplitude of the spring 5 can be reduced during transportation, and the spring 5 can be prevented from separating from the screw body.

[0028] The retaining assembly 4 is elastic. The retaining assembly 4 includes a retaining part 402 fixed in the annular groove 3. A guide part 401 is fixed on the free end of the retaining part 402. The guide part 401 has an arc-shaped protrusion in the middle position towards the axis of the screw 1. One end of the spring 5 in the annular groove 3 is located inside the multiple retaining parts 402.

[0029] The retaining part 402 is fixed to the bottom of the annular groove 3. The retaining part 402 and the guide part 401 are integrally formed, and the retaining part 402 is welded and fixed to the bottom of the annular groove 3. The retaining assembly 4 is made of elastic steel sheet.

[0030] When the spring 5 is assembled onto the screw body, the spring 5 is sleeved on the screw rod 1 of the screw body, causing the spring 5 to move towards the cap 2. The end of the spring 5 facing the cap 2 presses against the guide portion 401 of the retaining assembly 4, and the retaining assembly 4 deforms away from the screw rod 1. When the end of the spring 5 facing the cap 2 is located inside the retaining portion 402 of the retaining assembly 4, the retaining assembly 4 returns to its original position. The retaining assembly 4 retains and fixes one end of the spring 5 in the annular groove 3, which can effectively prevent the spring 5 from separating from the screw body.

[0031] The diameters at both ends of the spring 5 are larger than the diameter at the middle of the spring 5, and the diameters at both ends of the spring 5 are equal. When the spring 5 is assembled onto the screw body, it is not necessary to confirm the orientation of the assembly end of the ring groove 3. The spring 5 can be assembled directly, which can improve assembly efficiency.

[0032] Since the diameters at both ends of spring 5 are larger than the diameter at the middle of spring 5, the annular groove 3 can be moved away from the screw 1 during machining, making it convenient to machine the annular groove 3 with cutting tools on the cap 2. When welding the retaining component 4 inside the annular groove 3, the welding torch has sufficient downward space to facilitate welding and fixing the retaining part 402 in the annular groove 3.

[0033] Example 2: Based on Example 1, referring to... Figure 5 As shown, the clamping assembly 4 includes an inner block 403 fixed within an annular groove 3. One end of a spring 5 within the annular groove 3 is located inside the plurality of inner blocks 403. An arc-shaped protrusion 404 is fixed to one end of the inner block 403 facing the axis of the screw 1, and one end of the spring 5 within the annular groove 3 is located below the protrusion 404. The protrusion 404 and the inner block 403 are integrally formed, and the inner block 403 is welded and fixed in the annular groove 3.

[0034] In this embodiment, when the spring 5 is assembled onto the screw body, the spring 5 is sleeved on the screw rod 1 of the screw body, causing the spring 5 to move towards the cap 2. When one end of the spring 5 facing the cap 2 presses against the arc-shaped protrusion 404, the end of the spring 5 facing the cap 2 can deform. When the end of the spring 5 facing the cap 2 is located below the protrusion 404, the end of the spring 5 facing the cap 2 returns to its original position. The spring 5 facing the cap 2 is limited within the annular groove 3, which can prevent the spring 5 from separating from the screw body.

[0035] Because the diameter of the two ends of the spring 5 is larger than the diameter of the middle part of the spring 5, when the ring groove 3 is machined, the ring groove 3 can be far away from the screw rod 1. When the inner block 403 is welded in the ring groove 3, the welding gun has enough space to be lowered, which facilitates the welding of the inner block 403 in the ring groove 3.

[0036] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A screw assembly spring fastening device comprising a screw body consisting of a screw shaft (1) and a cap head (2), characterized in that, The hat head (2) lower end is provided with a ring groove (3) concentric with the screw rod (1), a plurality of clamping assemblies (4) are fixedly arranged on the inner circumference of the ring groove (3), the spring (5) is sleeved on the screw rod (1), the diameters of the upper and lower ends of the spring (5) are greater than the diameter of the middle part of the spring (5), the diameters of the two ends of the spring (5) are equal, one end of the spring (5) is located in the ring groove (3), one end of the spring (5) in the ring groove (3) is clamped by the plurality of clamping assemblies (4), and the middle part of the spring (5) is in contact with the outer edge of the screw rod (1).

2. A screw assembly spring fastening device according to claim 1, wherein The clamping assembly (4) is elastic.

3. A screw assembly spring fastening device according to claim 2, wherein The clamping assembly (4) comprises a clamping part (402) fixed in the ring groove (3), a guide part (401) is fixed on the free end of the clamping part (402), the middle position of the guide part (401) is arc-shaped protruded towards the axial direction of the screw rod (1), and one end of the spring (5) in the ring groove (3) is located inside the plurality of clamping parts (402).

4. A screw assembly spring fastening device according to claim 3, wherein The clamping part (402) is fixed on the groove bottom of the ring groove (3).

5. The screw-assembled spring fastening device according to claim 2, wherein The clamping assembly (4) is made of elastic steel sheet.

6. The screw-assembled spring fastening device according to claim 3, wherein The clamping part (402) and the guide part (401) are integrally formed, and the clamping part (402) is welded and fixed on the groove bottom of the ring groove (3).

7. The screw-assembled spring fastening device according to claim 1, wherein The clamping assembly (4) comprises an inner block (403) fixed in the ring groove (3), one end of the spring (5) in the ring groove (3) is located inside the plurality of inner blocks (403), an arc-shaped protruding block (404) is fixed on one end of the inner block (403) facing the axial center of the screw rod (1), and one end of the spring (5) in the ring groove (3) is located below the protruding block (404).

8. A screw-assembled spring fastening device according to claim 7, characterized in that The protruding block (404) and the inner block (403) are integrally formed, and the inner block (403) is welded and fixed in the ring groove (3).

Images