TW201610321A - Pneumatic rod - Google Patents

Abstract

The present invention relates to a pneumatic rod, which comprises an outer tube and a telescopic rod axially penetrating through the first end wall of the outer tube. A fastening base is fixed within the outer tube. A valve cock is penetrated in the passage of the fastening base. An inner tube with a hollow chamber is axially disposed adjacent to the fastening base. The telescopic rod is abutted against the inner edge of the inner tube with a piston. The present invention is characterized in that the plastic inner tube is extended from the plastic fastening base as a whole, and the fastening base is extended with a surrounding wall from the edge of the passage to extend the length of the passage. The aforementioned design can significantly reduce the clearances between components of the pneumatic rod to reduce the possibility of the gas leakage within the pneumatic rod and increase the contact area of the valve cock with the passage for enhancing the leakage prevention effect of the valve cock.

Description

Gas pressure bar

This creation is about a gas pressure bar, especially a gas pressure bar that acts as a buffer and adjusts the height.

The gas pressure bar is mainly used to change the state of the gas during the compression process in the cylinder tube, and can be widely applied to appliances requiring high and low adjustment, such as, but not limited to, a chair.

Referring to the seventh figure, in conjunction with the seventh embodiment, the conventional gas pressure bar includes an outer tube (5), and the outer tube (5) is provided with a first end wall (51) and a second end wall respectively. (52); the second end wall (52) is provided with a pressing member (71), and a valve plug (72) is axially and inwardly spaced apart from the pressing member (71), and the valve plug (72) is disposed a valve (504) fixed to the valve seat (505) in the outer tube (5), the valve seat (505) is provided with an outlet (502) communicating with the hole (504), the pressing member (71) Operatively pressing the valve plug (72) to raise and lower, thereby opening and closing the opening (504) to open and close the outlet (502);

An end block (521) is disposed between the valve seat (505) and the second end wall (52) for fixing the pressing member (71) and the valve seat (505); adjacent to the valve seat (505) An inner tube (8) having a hollow chamber (80) having an inlet (501) communicating with the hollow chamber (80), the inner tube (8) and the outer tube (5) There is a gas chamber (503) communicating with the inlet (501) and the outlet (502). The gas pressure bar includes a telescopic rod (6) extending axially inside and outside the first end wall (51) of the outer tube (5), and the telescopic rod (6) is abutted against the inner tube by a piston member (61) 8) Inner edge.

However, the end block (521), the valve seat (505) and the inner tube (8) are each a separate component, and a plurality of components are bound to generate a plurality of gaps after being assembled, for long-term use because The wear between the components often causes the gas leakage in the gas pressure bar, and the effect of the conventional gas pressure bar is lowered by long-term use, so it is not ideal. In addition, the components are separately assembled and processed before assembly, and the production process is cumbersome; and the components are made of metal materials, the processing is not easy and the material cost is high, and the effect of the conventional gas pressure bar may be affected by the corrosion. After that. Therefore, the creators of the present invention believe that the conventional gas pressure rod construction is necessary for improvement.

In view of the problem of the conventional gas pressure bar, the creator of the present invention creates a gas pressure bar comprising an outer tube, the two ends of which are respectively provided with a first end wall and a second end wall, and the second end wall is pierced a pressing member, and a valve plug is disposed axially inwardly from the pressing member, the valve plug is disposed in a hole fixed in the fixing seat of the outer tube, and is hollow adjacent to the fixing seat The inner tube of the chamber is provided with a first outlet communicating with the opening toward the inner end wall of the second end wall, and the valve plug is operatively pressed and returned by the pressing member to open and close the opening to open and close the tube a first outlet, the inner tube wall is provided with a first inlet communicating with the hollow chamber, the outer side of the inner tube wall is provided with a first air passage communicating with the first inlet and the outlet; the gas pressure bar comprises a a telescopic rod extending axially inside and outside the first end wall of the outer tube, the telescopic rod being abutted against the inner edge of the inner tube by a piston member; wherein the inner tube of the plastic material is made of a plastic material Extending integrally, and the fixing seat extends a ring wall at an edge of the hole to make the hole long Extended.

Due to the design of the invention, the fixing seat and the inner tube are integrally extended, so that the joint gap of the gas bar is greatly reduced, thereby greatly reducing the chance of gas leakage in the gas bar, and improving the traditional gas bar due to the component connection. There are many gaps that affect the effect of the actuation, and the assembly procedure is greatly simplified compared to the conventional gas pressure bar. Moreover, since the fixing base and the inner tube are integrally extended and made of a plastic material, the injection molding can be integrally formed, the manufacturing is easy, and the plastic material is easy to process, so that the manufacturing and processing convenience thereof is greatly improved. In addition, the arrangement of the annular wall extends the length of the tunnel, thereby increasing the contact area between the valve plug and the tunnel, so that the valve plug can form a better venting effect.

(1) ‧ ‧ external management

(11) ‧‧‧First end wall

(111)‧‧‧First mat

(112)‧‧‧Resistance block

(113)‧‧‧Second mat

(12)‧‧‧Second end wall

(121) ‧ ‧ stop ring

(2) ‧‧‧ Telescopic rod

(21)‧‧‧ piston parts

(3) ‧ ‧ fixed seat

(30) (322) ‧‧‧Break ring

(31)‧‧‧Pressing parts

(32)‧‧‧ valve plug

(321)‧‧‧ neck section

(33) ‧‧‧ Holes

(34) ‧ ‧ Circumference

(4) ‧ ‧ inner management

(40) ‧‧‧ hollow room

(401) ‧ ‧ first exit

(401A) ‧ ‧ second exit

(402) ‧ ‧ first import

(402A) ‧ ‧ second import

(403)‧‧‧First airway

(403A)‧‧‧Second airway

(403B) (403C) ‧ ‧ airway

(41) ‧‧‧ inner tube end wall

(5) ‧ ‧ external management

(501)‧‧‧ Import

(502)‧‧‧Export

(503) ‧ ‧ air chamber

(504) ‧‧‧ Holes

(505)‧‧‧ Seat

(51)‧‧‧First end wall

(52) ‧‧‧second end wall

(521)‧‧‧End block

(6) ‧‧‧ Telescopic rod

(61)‧‧‧ piston parts

(71)‧‧‧Pressing parts

(72) ‧‧‧ valve plug

(8) ‧ ‧ inner management

(80) ‧ ‧ hollow room

The first figure is an exploded view of the present invention

The second figure is a perspective view of the present invention

The third figure is a sectional view of the combination of the present invention

The fourth figure is a perspective view of the first air passage of the present invention.

Figure 5 is a perspective view of the first air passage according to another embodiment of the present invention.

Figure 6 is a cross-sectional view of another embodiment of the present invention on the top surface of the inner tube

Figure 7 is a plan sectional view of the prior art

The seventh A picture is a partial enlarged view of the seventh part of the seventh picture

The construction, features and embodiments of the present invention will be described with the aid of the drawings, and the reviewers will have a better understanding of the present invention.

Referring to the third figure, in conjunction with the first and second figures, the present invention relates to a gas pressure bar comprising an outer tube (1), the first end wall of each of the outer tubes (1) being respectively provided with a first end wall (11) And a second end wall (12) (the first figure is a three-dimensional decomposition, the first end wall has not been bent); the second end wall (12) is provided with a pressing member (31), the first A stop ring (121) is disposed on the inner side of the two end walls (12) for forming a latch with the pressing member (31) to prevent the pressing member (31) from falling off;

A valve plug (32) is axially and inwardly spaced apart from the pressing member (31), and a middle portion (321) of the valve plug (32) is provided with a narrow neck portion (321) for facilitating gas circulation. The valve plug (32) is provided with a damper ring (322) for preventing gas leakage.

The valve plug (32) is disposed in a hole (33) of a fixing seat (3) fixed in the outer tube (1), and a plurality of venting rings (30) are also arranged on the periphery of the fixing seat (3) The gas in the gas pressure bar is prevented from leaking through the joint between the fixing seat (3) and the outer tube (1); and the hollow space (40) is disposed adjacent to the fixing seat (3) axially adjacent to the fixing seat (3) a tube (4), the hollow chamber (40) is in communication with the tunnel (33); and a first outlet (401) communicating with the bore (33) toward the inner tube end wall (41) of the mount (3) The valve plug (32) is operatively pressed and returned by the pressing member (31) to open and close the hole (33) to open and close the first outlet (401); the inner tube (4) is provided with a wall a first inlet (402) communicating with the hollow chamber (40), the outer side of the inner wall of the inner tube (4) is provided with a first air passage (403) communicating with the first inlet and the outlet (402, 401) . The gas pressure bar includes a telescopic rod (2) extending axially inside and outside the first end wall (11) of the outer tube (1), and the telescopic rod (2) is abutted against the inner tube by a piston member (21) 4) Inner edge. This part is a general technique, so the detailed structure and actuation state are not described.

A first pad body (111) is disposed on the inner side of the first end wall (11), and a soft and deformable blocking block (112) is disposed on the inner side of the first pad body (111), and the blocking block (112) A second pad body (113) is disposed on the inner side. The blocking block (112) extends radially outwardly under the action of the axial air pressure and the first end wall (11), and simultaneously with the outer tube (1) and the telescopic rod ( 2) Form a close fit to prevent gas leakage in the gas pressure bar.

The feature of the present invention is that the inner tube (4) of the plastic material is integrally extended by the fixing base (3) of the plastic material, and the fixing seat (3) extends a ring wall (34) at the edge of the hole (33). In order to lengthen the length of the tunnel (33). Since the fixing base (3) and the inner tube (4) are integrally formed, the joint gap in the gas pressure bar is greatly reduced, and the chance of gas leakage in the gas pressure rod is greatly reduced. And because the number of components is reduced, the assembly procedure of the gas pressure bar is greatly simplified; since the fixing seat (3) and the inner tube (4) are made of a plastic material, the fixing seat (3) and the inner tube (4) are manufactured. And its internal or external passages or channels (such as the tunnel (33), the hollow chamber (40), the channel containing the choke ring (30), the first air passage (403), etc.) It is completed by integral injection molding, and no additional processing is required, which greatly increases manufacturing convenience. Even if it is necessary for processing (such as drilling, cutting, etc.), the processing convenience is greatly improved by the plastic material; in addition to facilitating forming, processing and assembly, the fixing material (3) of the plastic material and the inner tube ( 4) There is no rust and deterioration that affects the action of the gas pressure bar.

In addition, the fixing seat (3) extends a ring wall (34) at the edge of the tunnel (33) to lengthen the length of the tunnel (33). The design increases the contact area between the valve plug (32) and the tunnel (33), and the valve plug (32) can further add a plurality of damper loops (322), thereby making the valve plug (32) A better barrier effect is formed in the tunnel (33).

In a preferred embodiment, the fixing base (3) is further provided with a second outlet (401A), the inner tube (4) is further provided with a second inlet (402A), and the inner tube (4) tube The outer side surface of the wall further has a second air passage (403A) communicating with the second inlet and the outlet (402A, 401A), thereby expanding the air flow rate, so that the air rod is lifted at a faster speed.

As shown in the fourth figure, in a preferred embodiment, the first air passage (403) is spiraled along the outer side of the inner tube (4) to extend the length of the air flow passage in a limited space. And the long-term use does not affect the roundness of the cross section of the hollow chamber (40) of the inner tube (4).

Referring to the fifth figure, in conjunction with the sixth embodiment, in a preferred embodiment, the first air passage (403) is linear along the outer side of the inner tube (4), as shown in the figure. The outer surface of the tube (4) may be further provided with a plurality of linear air passages (403A, 403B, 403C), and the plurality of air passages (403, 403A, 403B, 403C) are radiated along the outer circumference of the inner tube (4). Arranged in order to increase the capacity of the air flow passage, and long-term use does not affect the roundness of the cross section of the hollow chamber (40) of the inner tube (4). As shown in the sixth figure, the plurality of air passages (403, 403A, 403B, and 403C) can be formed by cutting the outer cross section of the inner tube (4) into a polygonal shape and then abutting against the outer tube (1).

In summary, the creation of the present invention is indeed in line with the industrial applicability, and is not found in the publication or public use before the application, nor is it known to the public, and has non-obvious knowledge, conforms to the patentable requirements, and is patented according to law. Application.

However, the above-mentioned statements are a preferred embodiment of the invention in the creation of the invention, and all the changes in the scope of the patent application according to the invention are within the scope of the claim.

(1) ‧ ‧ external management

(11) ‧‧‧First end wall

(111)‧‧‧First mat

(112)‧‧‧Resistance block

(113)‧‧‧Second mat

(12)‧‧‧Second end wall

(121) ‧ ‧ stop ring

(2) ‧‧‧ Telescopic rod

(21)‧‧‧ piston parts

(3) ‧ ‧ fixed seat

(30) (322) ‧‧‧Break ring

(31)‧‧‧Pressing parts

(32)‧‧‧ valve plug

(321)‧‧‧ neck section

(33) ‧‧‧ Holes

(34) ‧ ‧ Circumference

(4) ‧ ‧ inner management

(40) ‧‧‧ hollow room

(401) ‧ ‧ first exit

(401A) ‧ ‧ second exit

(402) ‧ ‧ first import

(402A) ‧ ‧ second import

(403)‧‧‧First airway

(403A)‧‧‧Second airway

(41) ‧‧‧ inner tube end wall

Claims (4)

[Item 1] A gas pressure bar includes an outer tube, wherein the outer tube has a first end wall and a second end wall respectively, and the second end wall is provided with a pressing member, and the pressing member is axially facing inwardly a valve plug, the valve plug is disposed in a hole fixed in the fixing seat of the outer tube, and an inner tube having a hollow chamber is disposed adjacent to the fixing seat, and the hollow chamber communicates with the hole a first outlet communicating with the opening toward the inner tube end wall of the fixing seat, the valve plug is configured to operably press and return the pressing member to open and close the opening to open and close the first outlet, the inner tube The tube wall is provided with a first inlet communicating with the hollow chamber, and the outer side surface of the inner tube tube is provided with a first air passage communicating with the first inlet and the outlet; the gas pressure rod includes an axially extending outer side a telescopic rod inside and outside the first end wall of the tube, the telescopic rod is abutted against the inner edge of the inner tube by a piston member; wherein the inner tube of the plastic material is integrally extended by the fixing base of the plastic material, and the fixing seat A ring wall extends from the edge of the tunnel to extend the length of the tunnel. [Item 2] The gas pressure rod of claim 1, wherein the fixing seat further comprises a second outlet, the inner tube wall further has a second inlet, and the outer side of the inner tube wall is further provided with a first The second airway is the second import and export. [Item 3] The gas pressure rod of claim 1, wherein the first airway system is spiral along an outer side of the inner tube. [Item 4] The gas pressure rod of claim 1, wherein the first airway system is upright along an outer side of the inner tube.