Floor spring piston structure

Abstract

The utility model discloses a floor spring piston structure which comprises a piston, a large rotating shaft and a small rotating shaft are respectively and rotatably sleeved on inner cavities on the left side and the right side of the piston, a large steel sleeve is rotatably sleeved on the surface of the large rotating shaft through a roller pin, and a small steel sleeve is rotatably sleeved on the surface of the small rotating shaft. According to the floor spring piston structure, through rotation, extrusion and pushing of the large steel sleeve, the small steel sleeve and the rotating rod, friction force is reduced in the extrusion process, damage to the rotating rod is reduced, pushing is more stable, and it can be guaranteed that pushing is smooth.

Description

Technical Field

[0001] The utility model relates to the technical field of floor springs, in particular to a floor spring piston structure. Background Art

[0002] The floor spring is a hydraulic door closer used for opening and closing doors, and the floor spring piston is used for reciprocating motion. Existing pistons are directly squeezed by a rotating rod with a convex point to make the piston move left and right, but this direct squeezing will cause a large friction between the piston and the rotating rod, which will damage the rotating rod, and push will cause huge resistance, making the push unstable and unsmooth. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a floor spring piston structure, which solves the problems that direct extrusion will cause large friction between the piston and the rotating rod, which will damage the rotating rod, and pushing will cause huge resistance, making the pushing unstable and unsmooth.

[0004] To achieve the above purpose, the utility model is implemented through the following technical scheme: a floor spring piston structure, including a piston, wherein the inner cavities on the left and right sides of the piston are respectively rotatably sleeved with a large shaft and a small shaft, and the surface of the large shaft is rotatably sleeved with a large steel sleeve through a needle roller, and the surface of the small shaft is rotatably sleeved with a small steel sleeve.

[0005] Preferably, a safety valve is provided in the inner cavity at one end of the piston.

[0006] Preferably, the large steel sleeve and the small steel sleeve respectively match the inner cavities on both sides of the piston.

[0007] Preferably, the right sides of the large steel sleeve and the small steel sleeve extend out of the inner cavities on both sides of the piston. Beneficial Effects

[0008] The utility model provides a floor spring piston structure. Compared with the prior art, it has the following beneficial effects:

[0009] 1. The spring piston structure is pushed by the rotation of the large steel sleeve, the small steel sleeve and the rotating rod, which reduces friction during the extrusion process, reduces damage to the rotating rod, makes the push more stable, and ensures smooth push.

[0010] 2. The spring piston structure generates a relatively large driving force when the door is opened, which will squeeze and push the large steel sleeve. Therefore, the needle roller arranged between the large steel sleeve and the large rotating shaft can make the large steel sleeve bear a large force, thereby protecting it. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the utility model;

[0012] Figure 2 This is a structural breakdown diagram of the utility model;

[0013] Figure 3 This is a cross-sectional view of the structure of the utility model;

[0014] Figure 4 This is a schematic diagram of the structural piston of the utility model;

[0015] Figure 5 It is a side view of the structural piston of the utility model.

[0016] In the figure: 1. Piston; 11. Large steel sleeve; 12. Large rotating shaft; 13. Needle roller; 14. Small rotating shaft; 15. Small steel sleeve; 2. Safety valve. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figure 1-3 The utility model provides a technical solution: a floor spring piston structure, including a piston 1, an inner cavity at one end of the piston 1 is provided with a safety valve 2, the inner cavities on the left and right sides of the piston 1 are respectively rotatably sleeved with a large shaft 12 and a small shaft 14, and the surface of the large shaft 12 is rotatably sleeved with a large steel sleeve 11 through a needle roller 13, and the surface of the small shaft 14 is rotatably sleeved with a small steel sleeve 15, the large steel sleeve 11 and the small steel sleeve 15 are respectively matched with the inner cavities on both sides of the piston 1, and the right sides of the large steel sleeve 11 and the small steel sleeve 15 extend outside the inner cavities on both sides of the piston 1, so that it is convenient to squeeze and rotate with the large steel sleeve 11 and the small steel sleeve 15, and drive the piston 1 to move.

[0019] See also Figure 2 and 4 -5 A shaft groove is provided in the middle of the piston 1, and through holes are provided at one end of the piston 1 and the safety valve 2.

[0020] When installing the device, first, the rotating shaft groove in the middle of the piston 1 needs to be installed with a rotating rod with a convex point, and then it is installed in a hydraulic housing, so that one end of the rotating rod is exposed to the outside and connected to the bottom of the door, and then the installation of other components is completed.

[0021] When in use, when opening the door, rotate one end of the rotating rod leaking outside, the rotating rod will drive the convex point to rotate, and the convex point will squeeze the large steel sleeve 11, so that the large steel sleeve 11 is rotated and squeezed in the inner cavity of the large rotating shaft 12 through the needle roller 13, and drive the piston 1 to move in the shell to open the door. When closing the door, reverse the rotating rod so that the rotating rod squeezes the small steel sleeve 15, and pushes the piston 1 in the opposite direction to close the door. The large steel sleeve 11 and the small steel sleeve 15 are pushed and pushed by the rotating extrusion of the rotating rod, and the friction is reduced in the extrusion process, which reduces the damage to the rotating rod, and makes the pushing more stable, and can also ensure smooth pushing. Finally, because the driving force generated by opening the door is relatively large, it will squeeze and push the large steel sleeve 11. Therefore, the needle roller 13 arranged between the large steel sleeve 11 and the large rotating shaft 12 can make the large steel sleeve 11 withstand a large force, thereby protecting it.

[0022] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0023] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A floor spring piston structure, comprising a piston (1), characterized in that: The inner cavities on the left and right sides of the piston (1) are rotatably sleeved with a large rotating shaft (12) and a small rotating shaft (14), respectively, and the surface of the large rotating shaft (12) is rotatably sleeved with a large steel sleeve (11) via a needle roller (13), and the surface of the small rotating shaft (14) is rotatably sleeved with a small steel sleeve (15).

2. A floor spring piston structure according to claim 1, characterized in that: A safety valve (2) is provided in the inner cavity at one end of the piston (1).

3. A floor spring piston structure according to claim 1, characterized in that: The large steel sleeve (11) and the small steel sleeve (15) respectively fit in with the inner cavities on both sides of the piston (1).

4. A floor spring piston structure according to claim 3, characterized in that: The right sides of the large steel sleeve (11) and the small steel sleeve (15) extend outside the inner cavities on both sides of the piston (1).

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