TWI572802B - Novel valve device - Google Patents

Description

Novel valve structure

The present invention relates to the field of pneumatic tools, and more particularly to a novel valve structure for use in pneumatic tools.

With the high modernization of society, many traditional fortifications have been largely completed with the aid of modern automated tools, such as assembling furniture, repairing hydropower, etc. These modern automated tools can be mainly divided into electric tools and pneumatic tools. (air tools).

Pneumatic tools are one of the most used tools in automated tools. Usually, the pneumatic tool is internally provided with a valve mechanism, and the valve mechanism can be pushed by pressing the trigger of the pneumatic tool, so that the gas of the external air source can enter the inside of the pneumatic tool for pneumatic operation. Please refer to the first figure, which is a side view of a conventional pneumatic tool; and, referring to the second figure, a side cross-sectional view of a conventional valve structure. As shown in the first and second figures, the switching mechanism of the conventional pneumatic tool 10' is mainly composed of a choke ring 12', a control rod 13' and a choke member 14', wherein the choke The ring 12' is fixed in the air passage 11' of the pneumatic tool 10', and a vent is provided in the center of the choke ring 12' 121’.

In the above, the control rod 13' is passed through the air hole 121' of the choke ring 12', wherein one end of the control rod 13' is corresponding to the trigger 15' of the pneumatic tool 10', and the control rod 13' is another One end is inserted into the air blocking member 14'. The air blocking member 14' is formed with a choke portion 141' on its circumferential side, and the choke portion 141' is pressed against the choke coil 12' by its end surface by the spring 16'. In this way, when the pneumatic tool 10' is in the standby state, the end surface of the choke portion 141' of the air blocking member 14' is pushed against the air hole 121' of the choke ring 12', thereby preventing the air passage 11' from being blocked. The gas enters the cylinder of the pneumatic tool 10' via the air vent 121' of the choke ring 12'. Conversely, as seen in the side cross-sectional view of the conventional valve structure shown in the third figure, when the user presses the trigger 15', the lever 13' is offset by an angle and drives the choke portion of the choke member 14'. The 141' is detached from the air vent 121' of the choke coil 12' so that the gas of the external air source can enter the cylinder of the pneumatic tool 10' through the air hole 121'.

The valve structure shown in the second and third figures is a valve structure that is currently commonly used in pneumatic tools; however, in the practical operation of pneumatic tools, the valve structure can be found to have the following drawbacks in use:

(1) From the actuation diagrams of the second and third figures, it can be known that when the trigger 15' pushes the lever 13' to be offset by an angle, the wind deflector 14' is simultaneously deflected by an angle, however, There is no isolation member between the air blocking member 14' and the choke ring 12' and between the air blocking member 14' and the inner wall of the air passage 11', so that the control rod 13' is offset from the air blocking member 14'. At the time of the angle, the resistance The choke portion 141' of the wind member 14' directly rubs against the inner wall of the choke ring 12' and the air passage '11'; it is conceivable that after the pneumatic tool 10' is used for a long period of time, the choke member 14' Repeated contact with the inner wall of the choke ring 12' and the air passage 11' will eventually cause wear of the inner wall of the choke ring 12' and the air passage 11', and in the worst case, the choke ring 12' or the air passage 11' The wall is broken.

(2) In accordance with the above description of point (1), once the choke ring 12' is worn or broken, it will inevitably affect the airtightness between the choke member 14' and the choke ring 12'; Since the choke ring 12' is pre-fixed in the air passage 11', even if the choke ring 12' is known to be damaged, the damaged choke coil 12' cannot be replaced, so that the user must replace the entire pneumatic tool 10'. .

From the above, it can be seen that the valve structure currently used in pneumatic tools has many design defects; in view of this, the inventors of the present invention have vigorously studied the invention and finally developed a novel valve structure of the present invention.

The main object of the present invention is to provide a novel valve structure which is a choke ring for use in a grip air passage of a pneumatic tool in conjunction with a choke rod assembly. In particular, the present invention embeds a soft annular cushioning member in the rigid choke ring and causes the annular cushioning member to protrude from the side wall of the choke ring. The design is such that the gas in the air passage can be prevented from entering the upper air chamber of the air passage via the gap between the choke ring and the inner wall surface of the air passage. Furthermore, since the choke member of the choke member is disposed at the lower end of the choke ring In the second ring portion, the second ring portion is interposed between the air blocking member and the inner wall surface of the air passage, thereby avoiding direct friction with the inner wall surface of the air passage when the air blocking member is actuated.

Therefore, in order to achieve the main object of the present invention, the inventor of the present invention proposes a novel valve structure which is a choke ring for use in an air passage of a grip of a pneumatic tool in cooperation with a choke rod assembly. The novel valve structure includes: a first ring portion having an air hole formed in a center thereof, and an annular buffer member protruded from a side wall thereof; and a second ring portion extending perpendicularly from a side wall of the first ring portion; Wherein, the air blocking rod assembly disposed in the air passage has a wind blocking member disposed in the second ring portion; and a control rod connected to the air blocking member extends vertically from the air blocking member to pass through The air hole; wherein the second ring portion is interposed between the air blocking member and the inner wall surface of the air passage to prevent direct friction between the air blocking member and the inner wall surface of the air passage; and the annular buffer member The portion protruding from the side wall of the choke is interposed between the outer wall surface of the choke ring and the inner wall surface of the air passage to prevent gas in the air passage from entering through a gap between the choke ring and the inner wall surface of the air passage. On one of the airways Air chamber.

<present invention>

2‧‧‧ pneumatic tools

21‧‧‧ grip

211‧‧‧ airway

11‧‧‧Steel ring

12‧‧‧Steel

13‧‧‧Control lever

111‧‧‧First Ring

112‧‧‧ Second Ring

1111‧‧‧ vent

113‧‧‧Setting slot

1112‧‧‧ ring buffer

114‧‧‧ convex

1121‧‧‧Upper air chamber

121‧‧‧Circular body

122‧‧‧wings

123‧‧‧Connecting parts

23‧‧‧ wrench assembly

25‧‧‧Cylinder housing housing

22‧‧‧Intake bushing

<知知>

10’‧‧‧ pneumatic tools

12’‧‧‧Resistance ring

13’‧‧‧Control lever

14'‧‧‧Steel

11’‧‧‧ Airway

121’‧‧‧ vent

15'‧‧‧ board machine

141’‧‧‧The Department of the Wind

16’‧‧·spring

The first view is a side view of a conventional pneumatic tool; the second view is a side cross-sectional view of a conventional valve structure; the third view is a side cross-sectional view of a conventional valve structure; and the fourth figure is a partial structural perspective view of a pneumatic tool. The fifth drawing is a cross-sectional view showing a part of the structure of the pneumatic tool shown in the fourth figure; the sixth drawing is a side sectional view of a novel valve structure of the present invention; and the seventh drawing is an actuating diagram of the wrench component of the pneumatic tool.

In order to be able to more clearly describe a novel valve structure of the present invention, a preferred embodiment of the present invention will be described in detail below with reference to the drawings.

Please refer to the fourth figure, which is a partial structural perspective view of a pneumatic tool; and, please refer to the fifth figure at the same time, which is a sectional view of a part of the structure of the pneumatic tool shown in the fourth figure. As shown in the fourth and fifth figures, the novel valve structure of the present invention is disposed in the air passage 211 in the grip 21 of the pneumatic tool 2, and the novel valve structure is a windshield 11 formed by injection molding. It is applied to the air passage 211 of the grip 21 of the pneumatic tool 2 in cooperation with a wind block assembly; the set of air rod assemblies mainly includes a wind block 12 and a control rod 13.

Please refer to the sixth figure at the same time, which is a side cross-sectional view of the novel valve structure of the present invention. As shown in the figure, the choke ring 11 of the novel valve structure is composed of a first ring portion 111 and a second ring portion 112, wherein the first ring An air hole 1111 is formed in the center of the portion 111, and a groove 113 is formed in the first ring portion 111 for arranging an annular buffer member 1112 inside the first ring portion 111. Further, at least one convex portion 114 is formed, for example, a bump formed on the upper and lower inner wall surfaces of the installation groove 113. The arrangement of the convex portion 114 ensures that the annular cushioning member 1112 does not fall off from the first ring portion 111 during the forming process of the entire choke ring 11 . In addition, the second ring portion 112 extends perpendicularly from the sidewall of the first ring portion 111 for receiving the air blocking member 12 therein.

The novel valve construction of the present invention continues to be described. The air blocking member 12 is composed of an annular body 121, a plurality of flaps 122 and a connecting member 123. The plurality of flaps 122 are formed on the side of the annular body 121, and the connecting member 123 is formed. At the bottom of the annular body 121, an elastic member (not shown) disposed in the air passage 211 is connected. In addition, the control rod 13 is connected to the air blocking member 12 at one end thereof, and passes through the air hole 1111 at the other end thereof to contact the wrench assembly 23 of the pneumatic tool 2.

The above is a clear description of the basic components of the novel valve structure of the present invention; hereinafter, the technical features and advantages of the novel valve structure of the present invention will be described by the actuation of the wrench assembly 23 of the pneumatic tool 2. Please refer to the seventh diagram for the actuation of the wrench assembly of the pneumatic tool (please refer to the relevant components of the novel valve structure and their component symbols shown in the fifth and sixth figures).

As shown in the figure (a) of the seventh figure, when the wrench assembly 12 of the pneumatic tool 2 is not pressed, the annular body 121 of the air blocking member 12 abuts against the bottom of the first ring portion 111 with its top surface. In this way, the gas input from the external air source is blocked from entering the air hole 1111 of the first ring portion 111 via the air passage 211. As shown in the figure (b) of the seventh figure, when the wrench assembly 12 is pressed to push the lever 13, the air blocking member 12 is tilted by the control lever 13; at this time, the gas in the air passage 211 The second ring portion 112 can pass through the air hole 1111 of the first ring portion 111 and enter an upper end air chamber 1121 above the choke ring 11; further, the gas passes through the grip 21 of the pneumatic tool 2 and An intake bushing 22 between the housings 25 is received by the cylinders, and then enters the cylinder housing casing 25 via the intake bushings 22. Finally, as shown in the figure (c) of the seventh figure, when the wrench assembly 12 is returned to the original position, the lever 13 and the choke member 12 are simultaneously released from the tilted state and returned to the initial position, so that the ring of the choke member 12 is The body 121 abuts against the bottom end of the first ring portion 111 with its top surface.

Thus, through the above description of the design of the components of the novel valve structure of the present invention and the actuation of the mating wrench assembly 12, those skilled in the art will be able to understand that the technical features and advantages of the novel valve structure are:

(1) The present invention mainly provides a choke ring 11 as a novel valve structure which can be applied to the air passage of a gripper of a pneumatic tool in conjunction with any of the choke rod assemblies, such as a rocking mobile choke or Drooping Straight moving choke. Obviously, the novel valve structure proposed by the present invention has broad applicability.

(2) In addition, the present invention specifically designs the choke ring 11 to have a first ring portion 111 and a second ring portion 112, and design a vent hole 1111 in the first ring portion 111, and then a second ring portion. The air blocking member 12 is accommodated in the annular shape; the design is such that the second ring portion 112 is interposed between the air blocking member 12 and the inner wall surface of the air passage 211, thereby preventing the air blocking member 12 from being activated. The inner wall surface of the air passage 211 is directly rubbed.

(3) Further, in the present invention, a soft annular cushioning member 1112 is embedded in the rigid choke ring 11 and the annular cushioning member 1112 protrudes from the side wall of the choke ring 11. The design is such that the portion of the annular cushioning member 1112 protruding from the side wall of the choke ring 11 is interposed between the outer wall surface of the choke ring 11 and the inner wall surface of the air passage 211 to block the gas in the air passage 211. The air chamber 1121 is accessed through the gap between the choke ring 11 and the inner wall surface of the air passage 211.

It is to be understood that the foregoing detailed description of the embodiments of the present invention is not intended to Both should be included in the scope of the patent in this case.

11‧‧‧Steel ring

12‧‧‧Steel

13‧‧‧Control lever

111‧‧‧First Ring

112‧‧‧ Second Ring

1111‧‧‧ vent

113‧‧‧Setting slot

1112‧‧‧ ring buffer

114‧‧‧Extrusion structure

121‧‧‧Circular body

122‧‧‧wings

123‧‧‧Connecting parts

Claims (4)

A novel valve structure is a choke ring for use in an air passage of a grip of a pneumatic tool in conjunction with a choke assembly; the novel valve structure includes: a first ring portion, Forming a hole in the center, comprising: a groove disposed on the side wall of the first ring portion for embedding an annular buffer member; wherein the first ring portion is made of a hard material, and the The annular buffer member is made of a soft material; and at least one convex portion is formed in the installation groove for squeezing such that a portion of the annular buffer member protrudes from a side wall of the first ring portion And a second ring portion extending perpendicularly from a sidewall of the first ring portion; wherein the choke member disposed in the air channel, a wind block member is relatively located in the second ring portion And a control rod connected to the air blocking member extends vertically from the air blocking member to pass through the air hole; wherein the second ring portion is between the air blocking member and the inner wall surface of the air passage It can avoid direct contact with the inner wall surface of the air passage when the air blocking member is actuated And rubbing the portion of the annular cushioning member protruding from the side wall of the first ring portion between the outer wall surface of the first ring portion and the inner wall surface of the air passage to prevent gas in the air passage from passing through the first Ring And a gap between the inner wall surface of the air passage enters the upper end air chamber of the air passage. The novel valve structure of claim 1, wherein the hard material may be metal or plastic. The novel valve structure according to claim 1, wherein the soft material may be rubber, silicone, polyvinyl chloride (PVC), polyurethane (PU), or thermoplastic polyurethane ( Thermoplastic Polyurethane, TPU). The novel valve structure of claim 1, wherein the first ring portion is further provided with a groove for providing the annular buffer member in the first ring portion.