Assembly structure of air valve piston and piston rod

Abstract

The utility model provides an air valve piston and piston rod assembling structure which comprises a piston and a piston rod. The outer diameter of the insertion rod is smaller than that of the piston rod, the insertion rod and the piston rod are coaxially arranged, and the insertion rod and the lower end of the piston rod are both inserted into the upper end of the piston; at least one annular inverted buckle is coaxially arranged on the outer wall of the inserting rod, and the annular inverted buckle is matched and fastened with the inner circumferential wall of the piston; compared with a traditional mode that the piston rod and the piston are fastened through a fastening screw or a fastening nut, the piston rod has the advantage that the piston rod and the piston are convenient to assemble.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of air valve for automobile seat, specifically, an assembly structure of air valve piston and piston rod. BACKGROUND

[0002] In the height adjusting device of automobile seat, the air valve is an important device for controlling the air path. For example, the height adjusting air valve assembly in the height adjusting device of automobile seat disclosed in Chinese patent publication No. CN219618944U. The existing air valve mainly includes a valve body, a piston rod and a piston. The piston is axially movably arranged in the interior of the valve body, and one end of the piston rod is inserted into the valve body and fastened with the piston. However, in the existing air valve structure, the piston and the piston rod are fastened together by a fastening screw or a fastening nut, thereby having the disadvantage of inconvenient fastening of the piston rod and the piston. SUMMARY

[0003] The technical problem to be solved by the utility model is to provide an assembly structure of air valve piston and piston rod, which has the advantage of convenient assembly of the piston rod and the piston compared with the conventional way of fastening the piston rod and the piston by a fastening screw or a fastening nut.

[0004] The utility model provides an assembly structure of air valve piston and piston rod, which comprises a piston and a piston rod. The lower end of the piston rod is provided with a plug rod, the outer diameter of the plug rod is smaller than that of the piston rod and the plug rod is coaxially arranged with the piston rod. The lower end of the plug rod and the piston rod is inserted into the upper end of the piston. At least one annular reverse buckle is coaxially arranged on the outer wall of the plug rod, and the annular reverse buckle is buckled tightly with the inner peripheral wall of the piston.

[0005] After the lower end of the plug rod and the piston rod is inserted into the upper end of the piston, the annular reverse buckle arranged on the outer wall of the plug rod can be buckled tightly with the inner peripheral wall of the piston, that is, the piston rod and the piston are fastened together by buckling connection. Compared with the conventional way of fastening the piston rod and the piston by a fastening screw or a fastening nut, the assembly structure has the advantage of convenient assembly of the piston rod and the piston.

[0006] In one possible implementation, a plurality of annular reverse buckles are arranged on the outer wall of the plug rod, and the annular reverse buckles are spaced apart along the axial direction of the plug rod. All the annular reverse buckles are buckled tightly with the inner peripheral wall of the piston. After the lower end of the plug rod and the piston rod is inserted into the upper end of the piston, all the annular reverse buckles can be buckled tightly with the inner peripheral wall of the piston under the action of the plurality of annular reverse buckles, thereby further improving the assembly firmness and reliability of the piston rod and the piston.

[0007] In a possible implementation, an outer wall of the insertion rod at the edge of each annular reverse buckle is provided with an annular groove which is tapered inwardly along the radial direction of the insertion rod; by adopting this structure, when the inner cavity of the piston is extruded by the annular reverse buckle and deformed, the deformed part of the piston inner wall after deformation can be clamped into the annular groove, i.e., the annular groove can also play a role in avoiding the deformed part, thereby not only improving the assembly firmness and reliability of the piston rod and the piston, but also avoiding the deformation of the outer side wall of the piston.

[0008] In a possible implementation, an outer peripheral wall of each annular reverse buckle is formed as an annular guide surface which is tapered inwardly from top to bottom, and the annular guide surface is used for cooperating with the inner wall of the piston to guide the insertion of the annular reverse buckle into the piston; by adopting this structure, under the action of the annular guide surface, during the insertion of the insertion rod into the upper end of the piston, the annular guide surface can cooperate with the inner wall of the piston to guide the insertion of the annular reverse buckle into the piston, i.e., the cooperation of the annular reverse buckle and the piston can be facilitated.

[0009] In a possible implementation, the connection between the piston rod and the insertion rod is formed as an annular taper surface which is tapered inwardly from top to bottom, the inner wall of the piston is provided with an annular step which is matched with the shape of the annular taper surface, and the annular taper surface abuts against the annular step; by adopting this structure, under the abutting action of the annular taper surface and the annular step, while cooperating with the annular reverse buckle and the piston, the axial positioning of the piston rod and the piston can be further achieved, i.e., the reliability and firmness of the assembled piston rod and insertion rod can be further improved. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 is a schematic view of the assembled structure of the piston and the piston rod;

[0011] Figure 2 is a schematic view of the sectional structure of the assembled structure of the piston and the piston rod;

[0012] Figure 3 is Figure 2 is a schematic view of the enlarged structure of position A in FIG. 4;

[0013] Figure 4 is a schematic view of the sectional structure of the disassembled structure of the piston and the piston rod;

[0014] Figure 5 is Figure 4 is a schematic view of the enlarged structure of position B in FIG. 5. DETAILED DESCRIPTION

[0015] First, those skilled in the art should understand that the embodiments are only used to explain the technical principles of the application examples, and are not intended to limit the protection scope of the application examples. Those skilled in the art can make adjustments as needed to adapt to specific application occasions.

[0016] In the description of the application examples, it should be noted that unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the application examples can be understood according to the specific circumstances.

[0017] In the application examples, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0018] The application will be further described in detail below in conjunction with the drawings and specific embodiments.

[0019] Referring to Figures 1-5 As shown in the drawings, the application examples disclose an assembly structure of a gas valve piston and a piston rod, which comprises a piston 1 and a piston rod 2; the lower end of the piston rod 2 is provided with a plug rod 21, the outer diameter of the plug rod 21 is smaller than that of the piston rod 2 and is coaxially arranged with the piston rod 2, and the lower end of the plug rod 21 and the piston rod 2 are inserted into the upper end of the piston 1; at least one annular reverse buckle 22 is coaxially arranged on the outer wall of the plug rod 21, and the annular reverse buckle 22 is buckled tightly with the inner peripheral wall of the piston 1; the above-mentioned piston is injection molded by a plastic material.

[0020] The outer wall of the plug rod 21 is provided with a plurality of annular reverse buckles 22, the plurality of annular reverse buckles 22 are distributed along the axial direction of the plug rod 21, and all the annular reverse buckles 22 are buckled tightly with the inner peripheral wall of the piston 1; after the lower end of the plug rod and the piston rod is inserted into the upper end of the piston, all the annular reverse buckles can be buckled tightly with the inner peripheral wall of the piston under the action of the plurality of annular reverse buckles, thereby further improving the assembly firmness and reliability of the piston rod and the piston.

[0021] The outer wall of the insertion rod 21 at the upper edge of each annular reverse buckle 22 is provided with an annular groove 23 which is contracted inwardly along the radial direction of the insertion rod 21; after the inner cavity of the piston is extruded by the annular reverse buckle and deformed, the deformed part on the inner wall of the piston can be clamped into the annular groove, i.e. the annular groove can also play the role of avoiding the deformed part, so as to not only improve the assembly firmness and reliability of the piston rod and the piston, but also avoid the deformation of the outer side wall of the piston.

[0022] The outer peripheral wall of each annular reverse buckle 22 is formed with an annular guide surface 24 which is gradually contracted inwardly from top to bottom, and the annular guide surface 24 is used for cooperating with the inner wall of the piston 1 to guide the insertion of the annular reverse buckle 22 into the piston 1; after adopting this structure, under the action of the annular guide surface, the annular guide surface can cooperate with the inner wall of the piston to guide the insertion of the annular reverse buckle into the piston during the insertion of the insertion rod into the upper end of the piston, i.e. the cooperation of the annular reverse buckle and the piston can be facilitated.

[0023] The connection between the piston rod 2 and the insertion rod 21 is formed with an annular taper surface 25 which is gradually contracted inwardly from top to bottom, the inner wall of the piston 1 is provided with an annular step 11 which is matched with the shape of the annular taper surface 25, and the annular taper surface 25 abuts against the annular step 11; after adopting this structure, under the abutting action of the annular taper surface and the annular step, and cooperating with the annular reverse buckle and the piston, the axial positioning of the piston rod and the piston can be further realized, i.e. the reliability and firmness of the assembled piston rod and insertion rod can be further improved.

[0024] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any changes or replacements within the technical range disclosed in the present application can be easily thought by those skilled in the art, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An assembly structure for a pneumatic valve piston and piston rod, comprising a piston (1) and a piston rod (2); characterized in that: The lower end of the piston rod (2) is provided with a plug rod (21). The outer diameter of the plug rod (21) is smaller than that of the piston rod (2) and is coaxially arranged with the piston rod (2). The plug rod (21) and the lower end of the piston rod (2) are both inserted into the upper end of the piston (1). At least one annular buckle (22) is coaxially arranged on the outer wall of the plug rod (21). The annular buckle (22) is engaged with the inner circumferential wall of the piston (1) to fasten.

2. The assembly structure of the valve piston and piston rod according to claim 1, characterized in that: The outer wall of the insert rod (21) is provided with a plurality of annular buckles (22), which are distributed at intervals along the axial direction of the insert rod (21). All the annular buckles (22) are engaged and fastened to the inner circumferential wall of the piston (1).

3. The assembly structure of the valve piston and piston rod according to claim 1 or 2, characterized in that: An annular groove (23) is provided on the outer wall of the insert (21) located at the upper edge of each of the annular buckles (22), and the annular groove (23) is formed by contracting inward along the radial direction of the insert (21).

4. The assembly structure of the valve piston and piston rod according to claim 3, characterized in that: Each of the annular buckles (22) has an annular guide surface (24) on its outer peripheral wall that gradually tapers inward from top to bottom. The annular guide surface (24) is used to guide the annular buckle (22) to cooperate with the inner wall of the piston (1) so that the annular buckle (22) can be inserted into the piston (1).

5. The assembly structure of the valve piston and piston rod according to claim 1, 2, or 4, characterized in that: The connection between the piston rod (2) and the insert rod (21) forms an annular conical surface (25) that gradually contracts inward from top to bottom. An annular step (11) is provided on the inner wall of the piston (1). The shape of the annular step (11) is adapted to the shape of the annular conical surface (25), and the annular conical surface (25) abuts against the annular step (11).

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