Screw and spring assembling jig

Abstract

The utility model relates to the technical field of screw and spring assembling, in particular to a screw and spring assembling jig. Comprising a screw, the screw is composed of a threaded column and a nut, and the threaded column is provided with a limiting convex ring; the end part of the spring can be clamped with the limiting convex ring; a plurality of stepped holes are evenly formed in the middle plate, the stepped holes are large in upper portion and small in lower portion, top sleeves are inserted into the small holes of the stepped holes and fixed to a bottom plate, the bottom plate is located below the middle plate, a plurality of vertical bolts are rotationally arranged on the bottom plate, the bolts are in threaded connection with the middle plate, and a pressing plate is arranged above the middle plate. The pressing plate is connected with the middle plate through an extrusion assembly. Through the arrangement of the top sleeve, the height of the top sleeve can be adjusted, the extrusion force of the spring on the limiting convex ring after the pressing plate moves downwards can be adjusted by adjusting the height of the top sleeve, it can be guaranteed that the end of the spring is effectively clamped with the limiting convex ring, and the device is suitable for assembling the spring with small elasticity and a screw.

Description

Technical Field

[0001] This utility model relates to the field of screw and spring assembly technology, specifically to a screw and spring assembly fixture. Background Technology

[0002] With the increasing demand for laptops, the speed of heat sink production is particularly important. However, the assembly of screws and springs on the production line can sometimes limit this speed. Generally, when performing this process, a spring is placed first and then the screw is tightened immediately. This process of placing one spring and one screw at a time greatly reduces the assembly speed, wasting a lot of time and manpower on this step alone.

[0003] To address the aforementioned technical problems, patent CN202271353U discloses a screw and spring assembly fixture for radiator assembly. It includes a cover plate, a middle plate, and a base plate connected sequentially. The screw consists of a screw end cap and a threaded portion. The outer diameter of the screw end cap is larger than the outer diameter of the threaded portion, and the inner diameter of the spring is larger than the outer diameter of the threaded portion but smaller than the outer diameter of the screw end cap. The middle plate has a set of through holes evenly distributed, with the inner diameter of each through hole equal to the outer diameter of the spring. Each through hole has a chamfer on the side near the cover plate. During assembly, after the middle plate and base plate are sequentially connected, a large number of springs are placed on the middle plate. By manually turning the springs, they automatically right themselves through the chamfered through holes in the middle plate and fall into the through holes. Then, a large number of screws are placed on the middle plate already filled with springs. By manually turning the screws, they automatically right themselves through the chamfered through holes in the middle plate and fall into the through holes containing the springs. At this point, the cover plate is inserted into the recessed outer contour of the middle plate. After a complete fit, the entire fixture is inverted, and all the completed screws and springs are connected and arranged on the bottom plane of the cover plate, ready for the next assembly step of the radiator. However, when tightening the spring screws, the springs are prone to falling off the screws, thus affecting assembly efficiency.

[0004] Patent document CN221436385U discloses a screw and spring assembly fixture, comprising a screw consisting of a threaded post and a nut, the nut being integrally formed with one end of the threaded post, a limiting protrusion ring being provided on the threaded post and positioned close to the nut, the outer diameter of the limiting protrusion ring being larger than the outer diameter of the threaded post and smaller than the outer diameter of the nut; a spring, the end of which can engage with the limiting protrusion ring, the outer diameter of the spring being smaller than the outer diameter of the nut; a base plate having a plurality of through holes evenly distributed on the base plate, the inner diameter of the through holes being equal to the outer diameter of the spring, an enlarged hole being provided at the upper end of each through hole, the inner diameter of the enlarged hole being larger than the outer diameter of the nut, the height of the enlarged hole being smaller than the height of the nut, a support ring being provided at the lower end of each through hole, the inner diameter of the support ring being smaller than the inner diameter of the spring and larger than the outer diameter of the threaded post; and a cover plate adapted to the top of the base plate.

[0005] During assembly, place a large number of springs on the base plate. Manually rotate the springs; they will pass through the enlarged openings into the through-holes. Remove any excess springs from the base plate. Then, place a large number of screws on the base plate already filled with springs. Manually rotate the screws; they will fall through the enlarged openings into the through-holes containing the springs. Remove any excess screws from the base plate. Next, place the cover plate into the recessed part of the base plate and press it down, causing the springs in the through-holes to engage with the limiting protrusions on the threaded posts. Remove the cover plate, flip the base plate, and pour out the assembled screws and springs. The ends of the springs can engage with the limiting protrusions, effectively preventing the springs from falling off the screws during spring screw assembly.

[0006] However, because a limiting ring is provided on the threaded post of the screw, the spring needs to be compressed to a certain extent so that the end of the spring is located outside the limiting ring and is engaged by the limiting ring. Some springs have relatively small elastic force. When the screw compresses the spring, the end of the spring may not be located outside the limiting ring and engaged by the limiting ring after the base plate contacts the cover plate. Therefore, further improvements are needed to make it suitable for assembling springs with smaller elastic force with screws. Utility Model Content

[0007] The main objective of this invention is to provide a screw-spring assembly fixture suitable for assembling springs with low elasticity and screws, ensuring that the spring end is effectively engaged by a limiting protrusion ring. To achieve the above objective, the technical solution provided by this invention is as follows:

[0008] A screw and spring assembly fixture includes a screw, which consists of a threaded post and a nut. The nut and the threaded post are integrally formed. A limiting protrusion is provided on the threaded post, which is located close to the nut. The outer diameter of the limiting protrusion is larger than the outer diameter of the threaded post but smaller than the outer diameter of the nut. The fixture also includes a spring, the end of which can engage with the limiting protrusion. The outer diameter of the spring is smaller than the outer diameter of the nut. Furthermore, the fixture includes an intermediate plate with multiple stepped holes evenly spaced, the stepped holes being wider at the top and narrower at the bottom. A top sleeve is inserted into the smaller hole of each stepped hole. When the spring enters the smaller hole of the stepped hole, it is blocked by the top sleeve. The top sleeve is fixed to a base plate, which is located below the intermediate plate. Multiple vertical bolts are rotatably mounted on the base plate and threadedly connected to the intermediate plate. A pressure plate is positioned above the intermediate plate and connected to the intermediate plate via a pressing assembly.

[0009] Specifically, the lower end of the pressure plate is fixed with multiple vertical light rods, which are slidably arranged in vertical holes in the middle plate.

[0010] Specifically, a pressure block corresponding to the stepped hole is fixed at the lower end of the pressure plate.

[0011] Specifically, the extrusion assembly includes two extrusion units, with an intermediate plate and a pressure plate located between the two extrusion units. Each extrusion unit includes a fixed shaft fixed to one end of the intermediate plate, a pressure rod sleeved on the fixed shaft, and an elongated hole on the pressure rod. The length direction of the elongated hole is parallel to the length direction of the pressure rod. A pin is fixed to the end of the pressure plate on one side of the fixed shaft, and the pin passes through the elongated hole.

[0012] Specifically, the large diameter of the stepped hole is larger than the diameter of the nut, and the large diameter of the stepped hole is larger than the diameter of the pressure block.

[0013] Specifically, the inner diameter of the top sleeve is smaller than the diameter of the threaded post.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. This utility model features a top sleeve with an adjustable height. By adjusting the height of the top sleeve, the squeezing force of the spring on the limiting protrusion ring after the pressure plate moves downward can be adjusted, ensuring that the end of the spring is effectively engaged with the limiting protrusion ring. This is suitable for assembling springs with low elasticity with screws.

[0016] 2. By setting a pressure bar, the pressure plate can easily move downward to squeeze the screw. The pressure plate is easy to disassemble, making it easy to remove the assembled screws and springs.

[0017] 3. This utility model can be manually assembled quickly with multiple springs and multiple screws, which is highly efficient. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the present invention.

[0019] Figure 2 This is a front view of the present invention.

[0020] Figure 3 This is a top view of the present invention.

[0021] Figure 4 for Figure 3 Sectional view along line AA.

[0022] The parts in the attached diagram are named as follows: 1. Intermediate plate, 2. Base plate, 3. Top sleeve, 4. Stepped hole, 5. Smooth rod, 6. Pressure plate, 7. Fixed shaft, 8. Pressure rod, 9. Long hole, 10. Pin, 11. Bolt, 12. Pressure block, 13. Nut, 14. Threaded post, 15. Limiting ring, 16. Spring. Detailed Implementation

[0023] 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.

[0024] Example 1: Refer to Figures 1-4 As shown, a screw spring assembly fixture includes a screw, which is composed of a threaded post 14 and a nut 13. The nut 13 and the threaded post 14 are integrally formed. A limiting protrusion 15 is provided on the threaded post 14. The limiting protrusion 15 is located close to the nut 13. The outer diameter of the limiting protrusion 15 is larger than the outer diameter of the threaded post 14 and smaller than the outer diameter of the nut 13.

[0025] It also includes a spring 16, the end of which can engage with the limiting protrusion 15, and the outer diameter of the spring 16 is smaller than the outer diameter of the nut 13.

[0026] It also includes an intermediate plate 1, on which multiple stepped holes 4 are evenly opened. The stepped holes 4 are larger at the top and smaller at the bottom, and the diameter of the larger hole of the stepped hole 4 is larger than the diameter of the nut 13.

[0027] A top sleeve 3 is inserted into the small hole of the stepped hole 4. After the spring 16 enters the small hole of the stepped hole 4, it can be blocked by the top sleeve 3. The top sleeve 3 is fixed on the base plate 2. The base plate 2 is located below the middle plate 1. Multiple vertical bolts 11 are rotatably installed on the base plate 2. The bolts 11 are threadedly connected to the middle plate 1.

[0028] The inner diameter of the top sleeve 3 is smaller than the diameter of the threaded post 14.

[0029] A pressure plate 6 is provided above the intermediate plate 1, and the pressure plate 6 is connected to the intermediate plate 1 through an extrusion assembly.

[0030] The lower end of the pressure plate 6 is fixed with a plurality of vertical light rods 5, which are slidably arranged in the vertical holes on the intermediate plate 1.

[0031] The extrusion assembly includes two extrusion units, with the intermediate plate 1 and the pressure plate 6 located between the two extrusion units.

[0032] The extrusion unit includes a fixed shaft 7 fixed to one end of the intermediate plate 1, a pressure rod 8 sleeved on the fixed shaft 7, and an elongated hole 9 opened on the pressure rod 8. The length direction of the elongated hole 9 is parallel to the length direction of the pressure rod 8. A pin 10 is fixed to the end of the pressure plate 6 on one side of the fixed shaft 7, and the pin 10 passes through the elongated hole 9.

[0033] When assembling the screw and spring 16, after the spring 16 is installed into the small hole of the stepped hole 4, the spring 16 is blocked by the top sleeve 3, and then the threaded post 14 of the screw is inserted into the spring 16. Then, position the pressure plate 6 above the screw nut 13, insert the smooth rod 5 into the vertical hole on the intermediate plate 1, move the pressure rod 8 along the axial direction of the fixed shaft 7, and position the pin 10 in the elongated hole 9. Then, swing the pressure rod 8 downward around the fixed shaft 7. During the downward swing of the pressure rod 8, the pressure plate 6 can squeeze the screw downward through the pin 10. During the process of the pressure plate 6 squeezing the screw downward and compressing the spring 16, the squeezing force of the upper end of the spring 16 on the limiting protrusion ring 15 gradually increases, and the upper end of the spring 16 undergoes expansion deformation. When the end of the spring 16 is engaged with the limiting protrusion ring 15, release the pressure rod 8, move the pressure rod 8 along the axial direction of the fixed shaft 7, and remove the pin 10 from the elongated hole 9. Then, after removing the pressure plate 6, the screw and spring 16 assembled in the stepped hole 4 can be taken out.

[0034] Rotating bolt 11 can adjust the height of top sleeve 3 in the small hole of stepped hole 4, which can adjust the squeezing force of spring 16 on limit protrusion ring 15 after pressure plate 6 moves down, and can ensure that the upper end of spring 16 is effectively engaged with limit protrusion ring 15. It is suitable for assembling spring 16 with screw with small elastic force.

[0035] Example 2: Based on Example 1, referring to... Figure 2 and Figure 4 As shown, a pressure block 12 corresponding to the stepped hole 4 is fixed to the lower end of the pressure plate 6. The diameter of the larger hole in the stepped hole 4 is larger than the diameter of the pressure block 12.

[0036] By setting the pressure block 12, after the pressure plate 6 contacts the intermediate plate 1, the pressure block 12 can increase the stroke of the screw, ensuring that the upper end of the spring 16 is effectively engaged with the limiting protrusion ring 15.

[0037] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A screw and spring assembly fixture, comprising a screw, the screw being composed of a threaded post (14) and a nut (13), the threaded post (14) having a limiting protrusion (15) disposed near the nut (13), the outer diameter of the limiting protrusion (15) being larger than the outer diameter of the threaded post (14) and smaller than the outer diameter of the nut (13); further comprising a spring (16), the end of the spring (16) being capable of engaging with the limiting protrusion (15), the outer diameter of the spring (16) being smaller than the outer diameter of the nut (13); characterized in that, It also includes an intermediate plate (1), on which multiple stepped holes (4) are evenly opened. The stepped holes (4) are larger at the top and smaller at the bottom. A top sleeve (3) is inserted into the small hole of the stepped hole (4). After the spring (16) enters the small hole of the stepped hole (4), it can be blocked by the top sleeve (3). The top sleeve (3) is fixed on the bottom plate (2). The bottom plate (2) is located below the intermediate plate (1). Multiple vertical bolts (11) are rotatably arranged on the bottom plate (2). The bolts (11) are threadedly connected to the intermediate plate (1). A pressure plate (6) is arranged above the intermediate plate (1). The pressure plate (6) is connected to the intermediate plate (1) through a pressing assembly.

2. The screw and spring assembly fixture according to claim 1, characterized in that, The lower end of the pressure plate (6) is fixed with a plurality of vertical light rods (5), which are slidably disposed in the vertical holes on the intermediate plate (1).

3. The screw and spring assembly fixture according to claim 1, characterized in that, The lower end of the pressure plate (6) is fixed with a pressure block (12) corresponding to the stepped hole (4).

4. The screw and spring assembly fixture according to claim 1, characterized in that, The extrusion assembly includes two extrusion units, with an intermediate plate (1) and a pressure plate (6) located between the two extrusion units. Each extrusion unit includes a fixed shaft (7) fixed to one end of the intermediate plate (1), a pressure rod (8) sleeved on the fixed shaft (7), and an elongated hole (9) opened on the pressure rod (8). The length direction of the elongated hole (9) is parallel to the length direction of the pressure rod (8). A pin (10) is fixed to the end of the pressure plate (6) on one side of the fixed shaft (7), and the pin (10) passes through the elongated hole (9).

5. The screw spring assembly fixture according to claim 3, characterized in that, The large diameter of the stepped hole (4) is larger than the diameter of the nut (13), and the large diameter of the stepped hole (4) is larger than the diameter of the pressure block (12).

6. The screw spring assembly fixture according to claim 1, characterized in that, The inner diameter of the top sleeve (3) is smaller than the diameter of the threaded column (14).

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