Anti-deviation type nitrogen spring

Abstract

The utility model provides a kind of anti-deviation nitrogen spring, including cylinder shell body, piston rod and deviation rectification guiding assembly.The outer periphery of cylinder shell body is equipped with multiple dovetail groove-shaped guide sliding groove;The piston end of piston rod is slidably arranged in the compression cavity of cylinder shell body, and the rod end of piston rod is equipped with two symmetrical engagement keys;Deviation rectification guiding assembly includes two engagement collets and multiple guide sliding strips, two engagement collets symmetrically hold the rod end of piston rod, one end of multiple guide sliding strips is detachably connected to corresponding engagement collet, and the other end of multiple guide sliding strips is slidably arranged in corresponding guide sliding groove.Dovetail groove-shaped guide sliding groove has larger sliding contact area, so that it can withstand greater lateral force, ensure the guiding effect of engagement collet and guide sliding strip when piston rod performs extension and contraction action, and guide sliding groove is arranged on the outer periphery of cylinder shell body, structure is more compact, so that the overall structure of nitrogen spring is smaller, improve the use scene and use flexibility of nitrogen spring.

Description

Technical Field

[0001] This utility model relates to the field of nitrogen spring technology, specifically an anti-bias nitrogen spring. Background Technology

[0002] Nitrogen springs for molds (also known as die nitrogen springs, nitrogen springs, nitrogen cylinders, or nitrogen cylinders) are a new type of elastic component that uses high-pressure nitrogen as the working medium. They are small in size, have high elastic force, long stroke, stable operation, are precisely manufactured, have a long service life, a smooth elastic force curve, and do not require pre-tensioning. They can perform tasks that are difficult for conventional elastic components such as metal springs, rubber, and air cushions to accomplish, simplifying mold design and manufacturing, facilitating mold installation and adjustment, extending mold life, and ensuring stable product quality. They can also be designed as a nitrogen spring system to function as part of the mold, easily achieving constant pressure and delayed action within the system. They are a new generation of ideal elastic components with flexible properties.

[0003] Currently, nitrogen springs are prone to uneven loading when the piston rod moves back and forth during use. To address this technical issue, some products on the market use guide posts and guide sleeves placed outside the cylinder body to guide the piston rod. However, this significantly increases the overall size of the nitrogen spring, limiting its application scenarios and reducing its flexibility. Utility Model Content

[0004] To overcome the shortcomings of the existing technology, this utility model provides an anti-biased nitrogen spring.

[0005] The present invention adopts the following technical solution: An anti-biased nitrogen spring, comprising: The cylinder shell body has multiple dovetail-shaped guide grooves on its outer periphery; A piston rod, the piston end of which is slidably disposed in the compression chamber of the cylinder body, and the rod end of the piston rod is provided with two symmetrical locking keys, each of which has a locking slot; The correction guide assembly includes two engaging sleeves and multiple guide slides. The two engaging sleeves symmetrically clamp the rod end of the piston rod and engage with the two slots one by one. One end of each of the multiple guide slides is detachably connected to the corresponding engaging sleeve, and the other end of each guide slide is slidably disposed in the corresponding guide groove.

[0006] In one embodiment, the piston rod has two symmetrical keyways at its end, and each engagement key is located in the corresponding keyway.

[0007] In one embodiment, the piston rod end is provided with an anti-rotation groove, and the two engaging sleeves are symmetrically engaged into the anti-rotation groove.

[0008] In one embodiment, the two engaging sleeves together form an anti-deviation guide clamp, which engages with the two clamps and the anti-rotation slot.

[0009] In one embodiment, the number of the plurality of guide sliders is four, and the number of the plurality of dovetail-shaped guide grooves is four, with the guide sliders and guide grooves arranged in pairs corresponding to each other.

[0010] In one embodiment, one end of the guide slide is connected to the engaging clip screw.

[0011] In one embodiment, the outer edges of the two engaging sleeves are provided with structural weight reduction notches.

[0012] In one embodiment, both of the engagement sleeves are integrally formed structures.

[0013] The beneficial effects of this utility model are as follows: By providing a dovetail-shaped guide groove on the outer periphery of the cylinder body, and connecting one end of a guide strip to a locking sleeve while the other end slides within the guide groove, the piston rod is guided in the extension / retraction direction through the engagement of the locking sleeve and the locking jaws. This dovetail-shaped guide groove has a large sliding contact area, enabling it to withstand greater lateral forces and ensuring the guiding effect of the locking sleeve and guide strip during piston rod extension / retraction. Furthermore, placing the guide groove on the outer periphery of the cylinder body results in a more compact structure, making the overall structure of the nitrogen spring smaller and improving its application scenarios and flexibility. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of an anti-biased nitrogen spring according to one embodiment; Figure 2 for Figure 1 A partial structural diagram; Figure 3 for Figure 1 Another part of the structural diagram; Explanation of reference numerals in the attached drawings: Cylinder housing body 1; Guide groove 11; Piston rod 2; Engaging key 21; Bayonet 211; Keyway 22; Anti-rotation groove 23; Correction guide assembly 3; Engaging sleeve 31; Anti-deviation guide clamp 311; Structural weight reduction notch 312; Guide slide bar 32. Detailed Implementation

[0016] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product.

[0017] It will be understood by those skilled in the art that certain well-known structures and their descriptions may be omitted in the accompanying drawings. The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0018] Please refer to the instruction manual appendix as well. Figure 1-3 As shown, this utility model discloses an anti-deviation nitrogen spring, comprising a cylinder body 1, a piston rod 2, and a deviation correction guide assembly 3. The outer periphery of the cylinder body 1 is provided with multiple dovetail-shaped guide grooves 11; the piston end of the piston rod 2 slides within the compression chamber of the cylinder body 1, and the rod end of the piston rod 2 is provided with two symmetrical engaging keys 21, each engaging key 21 having a locking slot 211; the deviation correction guide assembly 3 includes two engaging sleeves 31 and multiple guide strips 32. The two engaging sleeves 31 symmetrically clamp the rod end of the piston rod 2 and engage with the two locking slots 211 one-to-one. One end of each guide strip 32 is detachably connected to a corresponding engaging sleeve 31, and the other end of each guide strip 32 slides within a corresponding guide groove 11.

[0019] In this embodiment, a dovetail-shaped guide groove 11 is provided on the outer periphery of the cylinder body 1, and one end of the guide slide 32 is connected to the engaging sleeve 31, while the other end slides within the guide groove 11. Thus, when the piston rod 2 extends or retracts, the engaging sleeve 31 and the locking slot 211 provide sliding guidance for the piston rod 2 in the extension / retraction direction. The dovetail-shaped guide groove 11 of this invention has a large sliding contact area, enabling it to withstand greater lateral forces and ensuring the guiding effect of the engaging sleeve 31 and the guide slide 32 during the extension / retraction of the piston rod 2. Furthermore, by placing the guide groove 11 on the outer periphery of the cylinder body 1, the structure is more compact, resulting in a smaller overall structure for the nitrogen spring and improving its application scenarios and flexibility.

[0020] like Figure 1 and Figure 2As shown, preferably, the piston rod 2 has two symmetrical keyways 22 at its rod end, and each engaging key 21 is disposed in the corresponding keyway 22. It can be understood that the engaging key 21 is interference-fitted with the keyway 22 to secure the engaging key 21 within the keyway 22. The engaging key 21 protrudes from the rod end surface of the piston rod 2, and the locking slot 211 faces outwards, facilitating the engagement of the engaging sleeve 31 with the locking slot 211.

[0021] like Figure 1 and Figure 2 As shown, preferably, the piston rod 2 also has an anti-rotation groove 23 at its rod end, and two engaging sleeves 31 are symmetrically engaged into the anti-rotation groove 23. In this way, the piston rod 2 can be prevented from rotating during extension and retraction, thereby reducing unnecessary radial rotational friction between the piston end of the piston rod 2 and the inner wall of the compression chamber of the cylinder body 1, and extending the service life of the nitrogen spring.

[0022] like Figures 1 to 3 As shown, preferably, the two engaging sleeves 31 together form an anti-deviation guide clamp 311, which engages with the two clamps 211 and the anti-rotation groove 23. This ensures the secure clamping of the piston rod 2's end, effectively avoiding the slippage that easily occurs when using a clamp-type structure for simple clamping in the prior art. Simultaneously, the anti-rotation groove 23 also restricts the piston rod 2 from rotating or deflecting during extension and retraction.

[0023] like Figures 1 to 3 Preferably, there are four guide sliders 32 and four dovetail-shaped guide grooves 11, with each guide slider 32 and guide groove 11 corresponding to the other in pairs. This ensures the smoothness of the sliding of the guide sliders 32. Specifically, to improve the smoothness of the sliding of the guide sliders 32, in other embodiments, the sliding surface of the guide sliders 32 is provided with multiple lubricating oil grooves to store lubricating oil when it is applied. This allows the lubricating oil to overflow when the guide sliders 32 slide relative to the guide grooves 11, thus improving the smoothness of the sliding of the guide sliders 32.

[0024] like Figure 1 As shown, preferably, one end of the guide slide 32 is screwed to the engaging sleeve 31. This facilitates the disassembly, assembly, and maintenance of the engaging sleeve 31 and the guide slide 32.

[0025] like Figure 1As shown, preferably, the outer edges of the two engaging sleeves 31 are provided with structural weight reduction notches 312. Preferably, both engaging sleeves 31 are integrally formed structures. In this way, while ensuring that the engaging sleeves 31 have sufficient structural strength, the material cost of the engaging sleeves 31 can be reduced by setting the structural weight reduction notches 312, thereby making the overall structure of the nitrogen spring smaller, with better compactness, and improving the application scenarios and usage flexibility of the nitrogen spring.

[0026] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A nitrogen gas spring with anti-biasing properties, characterized in that, include: The cylinder body (1) has multiple dovetail-shaped guide grooves (11) on its outer periphery. Piston rod (2), the piston end of the piston rod (2) is slidably disposed in the compression chamber of the cylinder body (1), and the rod end of the piston rod (2) is provided with two symmetrical locking keys (21), each locking key (21) having a locking slot (211). The correction guide assembly (3) includes two engaging sleeves (31) and multiple guide slides (32). The two engaging sleeves (31) symmetrically clamp the rod end of the piston rod (2) and are engaged with the two bayonets (211) one by one. One end of the multiple guide slides (32) is detachably connected to the corresponding engaging sleeve (31), and the other end of the multiple guide slides (32) slides in the corresponding guide groove (11).

2. The anti-biased nitrogen spring according to claim 1, characterized in that, The piston rod (2) has two symmetrical keyways (22) at its rod end, and each engagement key (21) is located in the corresponding keyway (22).

3. The anti-biased nitrogen spring according to claim 2, characterized in that, The piston rod (2) is also provided with an anti-rotation groove (23) at its rod end, and the two locking sleeves (31) are symmetrically inserted into the anti-rotation groove (23).

4. The anti-biased nitrogen spring according to claim 3, characterized in that, The two locking sleeves (31) together form an anti-deviation guide clamp (311), which engages with the two locking slots (211) and the anti-rotation slot (23).

5. The anti-biased nitrogen spring according to claim 3, characterized in that, The number of the multiple guide slides (32) is four, and the number of the multiple dovetail grooves (11) is four, with the guide slides (32) and the guide grooves (11) arranged in pairs.

6. The anti-biased nitrogen spring according to claim 5, characterized in that, One end of the guide slide (32) is screwed to the engaging sleeve (31).

7. The anti-biased nitrogen spring according to claim 1, characterized in that, The outer edges of the two locking sleeves (31) are provided with structural weight reduction notches (312).

8. The anti-biased nitrogen spring according to claim 7, characterized in that, Both of the aforementioned locking sleeves (31) are integrally formed structures.

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