Tightness-adjustable compression spring

Abstract

The utility model discloses a tightness-adjustable compression spring which comprises a compression spring structure, the upper end of the compression spring structure is in threaded connection with the lower end of an upper end fixing base plate through a connecting bolt, and the upper end of the upper end fixing base plate is fixedly connected with an input end fixing base. The lower end of the compression spring structure is in threaded connection with the lower-end fixed chassis through a connecting bolt; the tail end of the upper end adjusting rod is fixedly connected with a first adjusting gear, the tail end of the first adjusting gear is meshed with a second adjusting gear, the interior of the second adjusting gear is in threaded connection with an upper end threaded connecting rod, the top end of the upper end threaded connecting rod is fixedly connected with an upper end fixing base plate, and the upper end threaded connecting rod is of a hollow structure. Through meshing rotation between the gears and threaded connection of the corresponding connecting rod structures between the gears, the chassis structure is driven to compress or loosen the spring, and the tightness degree of the compressed spring is adjusted.

Description

Technical Field

[0001] This utility model relates to the technical field of compression spring manufacturing, and in particular to an adjustable compression spring. Background Technology

[0002] In industrial production, compression springs are widely used in key structures such as shock absorption, transmission and reset between mechanical parts. Each component has different requirements for the tightness of the compression spring, so an adjustable compression spring is needed to meet the different needs.

[0003] A typical adjustable compression spring adjusts its tension by incorporating a structure between the spring sections that allows for size adjustment, thereby changing the initial length of the spring. However, this structure is generally difficult to adjust during use and lacks features to limit the spring's movement. Chinese patent application number "CN202211050974.1" discloses an adjustable compression spring comprising: a cylinder containing a compression spring body; a sliding rod second movably connected to the top of the cylinder; and an upper top plate fixedly connected to the bottom of the sliding rod second. This adjustable compression spring connects to the inner wall of the cylinder via an adjusting disc and an internal thread. The top of the spring applies a spring force to the lower surface of the upper plate, pushing it so that its upper surface aligns with the lower surface of the adjusting disc. At this point, the limiting protrusion engages with the limiting hole. When the auxiliary handle is turned, the sliding rod rotates, causing the upper plate to rotate as well. The engagement of the limiting protrusion and the limiting hole allows the adjusting disc to rotate inside the cylinder. Furthermore, the side of the adjusting disc engages with the internal thread, allowing it to move up and down within the cylinder. The fixed disc remains in a fixed position. However, this adjustment structure is relatively complex and only allows for unidirectional adjustment. Utility Model Content

[0004] The purpose of this invention is to at least solve one of the technical problems existing in the prior art, and to provide an adjustable compression spring. By setting up meshing rotation between gears, and by connecting corresponding connecting rods through threaded connections between the gears, the chassis structure is driven to compress or release the spring, thus adjusting the tension of the compression spring. By setting up upper and lower adjusting rods, and by setting upper and lower connecting blocks for limiting movement, bidirectional adjustment of the compression spring tension is achieved.

[0005] This utility model also provides a compression spring with the aforementioned adjustable tension, comprising: a compression spring structure, the upper end of which is threadedly connected to the lower end of an upper fixed base via a connecting bolt; an input end fixed seat is fixedly connected to the upper end of the upper fixed base; and the lower end of the compression spring structure is threadedly connected to the lower fixed base via a connecting bolt. An upper adjusting rod is also provided, with a first adjusting gear fixedly connected to its end, a second adjusting gear meshing with the end of the first adjusting gear, and an upper threaded connecting rod threadedly connected internally to the second adjusting gear. The upper fixed base is fixedly connected to the top of the upper threaded connecting rod, and the upper threaded connecting rod is a hollow structure. By setting the meshing rotation between the gears and the corresponding connecting rod structure threaded between the gears, the base structure is driven to compress or release the spring, thus adjusting the tension of the compression spring. By setting the upper and lower adjusting rods and the upper and lower connecting blocks for limiting movement, bidirectional adjustment of the compression spring tension is achieved.

[0006] According to the present invention, an adjustable compression spring is provided with an upper connecting block at the outer end of the upper threaded connecting rod, and a lower connecting block is fixedly connected to the lower end of the upper connecting block.

[0007] According to the present invention, an adjustable compression spring is provided, wherein an upper support frame is fixedly connected to the upper end of the upper connecting block, and a second adjusting gear is rotatably connected to the upper end of the upper support frame.

[0008] According to the present invention, an adjustable compression spring is provided, wherein a lower end support frame is fixedly connected to the lower end of the lower end connecting block, and a fourth adjusting gear is rotatably connected to the lower end of the lower end support frame.

[0009] According to the present invention, an adjustable compression spring is provided with a compression spring shell attached to the outer ends of the upper and lower fixed bases. An upper adjustment rod and a lower adjustment rod are provided on the side of the compression spring shell, and the diameter of the lower adjustment rod is smaller than that of the upper threaded connecting rod.

[0010] According to the present invention, an adjustable compression spring is provided, wherein a third adjusting gear is fixedly connected to the end of the lower adjusting rod, and a fourth adjusting gear is engaged at the outer end of the third adjusting gear.

[0011] According to the present invention, an adjustable compression spring is provided, wherein the fourth adjusting gear is internally threaded with a lower threaded connecting rod, and the lower threaded connecting rod is fixedly connected to a lower fixed base.

[0012] According to the present invention, an adjustable compression spring is provided, wherein an output end fixing seat is fixedly connected to the bottom end of the lower fixed chassis, and the output end fixing seat is connected to the output device.

[0013] Beneficial effects:

[0014] 1. Compared with the prior art, this adjustable compression spring adjusts the tension of the compression spring by setting up meshing rotation between gears and driving the chassis structure to compress or loosen the spring through the threaded connection between the gears and the corresponding connecting rod structure.

[0015] 2. Compared with the prior art, this adjustable compression spring achieves bidirectional adjustment of the compression spring's tension by setting an upper adjustment rod and a lower adjustment rod, and by setting an upper connection block and a lower connection block structure for limiting the movement. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0017] Figure 1 This is a structural diagram of the entire utility model;

[0018] Figure 2 This is a structural diagram of the present invention from an upward perspective;

[0019] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0020] Figure 4 This is a cross-sectional structural diagram of the adjustment device of this utility model.

[0021] Legend:

[0022] 1. Compression spring housing; 2. Upper adjusting rod; 3. Lower adjusting rod; 4. Upper fixed base; 5. Input fixed seat; 6. Lower fixed base; 7. Output fixed seat; 8. Third adjusting gear; 9. Upper connecting block; 10. Compression spring structure; 11. Connecting bolt; 12. Upper threaded connecting rod; 13. Lower connecting block; 14. Lower threaded connecting rod; 15. First adjusting gear; 16. Second adjusting gear; 17. Fourth adjusting gear; 18. Upper support frame; 19. Lower support frame. Detailed Implementation

[0023] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0024] refer to Figure 1-4 The adjustable compression spring of this embodiment includes: a compression spring structure 10, which enables the movement of the overall compression spring structure 10. The upper end of the compression spring structure 10 is threadedly connected to the lower end of the upper fixed base 4 via a connecting bolt 11. An input end fixing seat 5 is fixedly connected to the upper end of the upper fixed base 4. The lower end of the compression spring structure 10 is threadedly connected to the lower fixed base 6 via a connecting bolt 11, thus enabling connection with an input device.

[0025] An upper adjusting rod 2 has a first adjusting gear 15 fixedly connected to its end. A second adjusting gear 16 meshes with the end of the first adjusting gear 15. An upper threaded connecting rod 12 is internally threaded to the second adjusting gear 16. Rotation of the threaded rod adjusts the position of the upper threaded connecting rod 12, thus adjusting the tightness of the upper section. An upper fixed base 4 is fixedly connected to the top of the upper threaded connecting rod 12, which is a hollow structure. An upper connecting block 9 is provided at the outer end of the upper threaded connecting rod 12, and a lower connecting block 13 is fixedly connected to the lower end of the upper connecting block 9. An upper support frame 18 is fixedly connected to the upper end of the upper connecting block 9, and the second adjusting gear 16 is rotatably connected to the upper end of the upper support frame 18.

[0026] The lower end of the lower connecting block 13 is fixedly connected to the lower end support frame 19, and the lower end of the lower support frame 19 is rotatably connected to the fourth adjusting gear 17. This limits the position of the fourth adjusting gear 17 to prevent it from falling off. A compression spring housing 1 is fitted to the outer ends of the upper fixed chassis 4 and the lower fixed chassis 6. An upper adjusting rod 2 and a lower adjusting rod 3 are located on the side of the compression spring housing 1. The diameter of the lower adjusting rod 3 is smaller than that of the upper threaded connecting rod 12. A third adjusting gear 8 is fixedly connected to the end of the lower adjusting rod 3, and the fourth adjusting gear 17 meshes with the outer end of the third adjusting gear 8. A lower threaded connecting rod 14 is threadedly connected inside the fourth adjusting gear 17, and the lower fixed chassis 6 is fixedly connected to the end of the lower threaded connecting rod 14. This allows for adjustment of the tightness from below. An output end fixing seat 7 is fixedly connected to the bottom of the lower fixed chassis 6, and the output end fixing seat 7 is connected to the output device.

[0027] Working principle: When the tension of the compression spring needs to be adjusted, the upper adjusting rod 2 is driven, which in turn drives the second adjusting gear 16 to rotate through the first adjusting gear 15. The threaded structure of the second adjusting gear 16 causes the upper adjusting rod 2 to move, thereby adjusting the tension of the compression spring structure 10.

[0028] The tension at the lower end of the compression spring structure 10 needs to be adjusted. Rotate the lower adjustment rod 3 and repeat the above steps.

[0029] When the compression spring is needed, connect the input device to the input end mounting base 5 and the output device to the output end mounting base 7.

[0030] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A compression spring with adjustable tightness, characterized in that, Include: Compression spring structure (10), the upper end of the compression spring structure (10) is connected with the lower end of the upper end fixed chassis (4) through the connecting bolt (11), the upper end of the upper end fixed chassis (4) is fixedly connected with the input end fixed seat (5), the lower end of the compression spring structure (10) is connected with the lower end fixed chassis (6) through the connecting bolt (11); The upper end adjusting rod (2) is fixedly connected with the first adjusting gear (15) at the tail end, the first adjusting gear (15) is engaged with the second adjusting gear (16) at the tail end, the second adjusting gear (16) is internally threadedly connected with the upper end threaded connecting rod (12), the upper end threaded connecting rod (12) is fixedly connected with the upper end fixed chassis (4) at the top end, and the upper end threaded connecting rod (12) is a hollow structure.

2. The compression spring of claim 1, wherein, The upper end threaded connecting rod (12) is provided with an upper end connecting block (9) at the outer end, and the upper end connecting block (9) is fixedly connected with a lower end connecting block (13) at the lower end.

3. The compression spring of claim 2, wherein the spring has a length that is adjustable by a distance of at least 10% of the initial length of the spring. The upper end connecting block (9) is fixedly connected with an upper end support frame (18) at the upper end, and the upper end support frame (18) is rotatably connected with the second adjusting gear (16) at the upper end.

4. The compression spring of claim 2, wherein the spring has a length of 1.5 inches and a diameter of 0.5 inches. The lower end connecting block (13) is fixedly connected with a lower end support frame (19) at the lower end, and the lower end support frame (19) is rotatably connected with the fourth adjusting gear (17) at the lower end.

5. The compression spring of claim 1, wherein the spring has a spring rate of 0.5 to 2.0 lbs / in. The upper end fixed chassis (4) and the lower end fixed chassis (6) are provided with a compression spring shell (1) at the outer end, the compression spring shell (1) is provided with an upper end adjusting rod (2) and a lower end adjusting rod (3) at the side end, and the diameter of the lower end adjusting rod (3) is smaller than that of the upper end threaded connecting rod (12).

6. The compression spring of claim 5, wherein the spring has a length of 1.5 inches and a diameter of 0.5 inches. The lower end adjusting rod (3) is fixedly connected with the third adjusting gear (8) at the tail end, and the third adjusting gear (8) is engaged with the fourth adjusting gear (17) at the outer end.

7. The compression spring of claim 6 wherein, The fourth adjusting gear (17) is internally threadedly connected with the lower end threaded connecting rod (14), and the lower end threaded connecting rod (14) is fixedly connected with the lower end fixed chassis (6) at the tail end.

8. The compression spring of claim 7, wherein the spring has a length of 1.5 inches and a diameter of 0.5 inches. The lower end fixed chassis (6) is fixedly connected with the output end fixed seat (7) at the bottom end, and the output end fixed seat (7) is connected with the output device.

Images