CN201070760Y - air tool - Google Patents

Abstract

A pneumatic tool includes a body, a piston, an elastic member, and a trigger unit. The body comprises an air inlet flow channel, an air outlet flow channel and a valve hole, wherein the valve hole is provided with an operation section which is staggered with the air outlet flow channel and extends out of the body. The piston is arranged in the air inlet flow passage and comprises a top which can protrude into the valve hole. The elastic element continuously provides a force for the piston to abut against the valve hole. The trigger unit comprises an exposed key and a push rod extending into the operation section of the valve hole from the key, the push rod is provided with a tail end abutting against the top of the piston, and the piston moves between an opening position which is pushed by the push rod to be far away from the valve hole and a closing position which closes the valve hole.

Description

air tool

technical field

The utility model relates to a pneumatic tool, in particular to a pneumatic tool with a simplified structure for controlling gas circulation or cut-off.

Background technique

As shown in FIG. 1 , a conventional pneumatic tool 100 includes a body 11 , a cylinder 12 , a piston rod 13 , a button 14 , and an elastic element 15 .

The body 11 includes an inlet flow channel 111, an outlet flow channel 112, and a valve hole 113 connected between the inlet flow channel 111 and the outlet flow channel 112, the valve hole 113 and the outlet flow channel 112 intersect and Extending to the outside of the body 11, the cylinder 12 is sleeved in the valve hole 113, the piston rod 13 is passed through the cylinder 12 and extends out of the valve hole 113, the button 14 is connected to the piston rod 13 to provide In operation, the elastic element 15 is sleeved on the piston rod 13 and interposed between the button 14 and the cylinder 12 .

In this way, when the user presses the button 14, the piston rod 13 can be linked to slide, so that the gas in the inlet flow channel 111 is transported to the outlet flow channel 112 through the cylinder 12, so that the pneumatic tool 100 can smoothly Generate run.

However, the above-mentioned structural design still has the following disadvantages, so that the cost is still relatively high, and it is not easy to manufacture and process. The disadvantages are as follows:

(1). The structure of the cylinder 12 is not easy to carry out plastic injection molding, and it is not easy to remove the mold. Therefore, it is necessary to use high-cost metal materials, and it needs to be processed by cutting. The cylinder 12 produced in this way will lead to high material costs. And high labor cost.

(2). Since one end of the piston rod 13 must be sealed against the central perforation of the cylinder 12, and the other end must be connected to the button 14 for use, the piston rod 13 and the button 14 must be made separately, and integral molding cannot be simplified. Resulting in increased costs and a large number of parts.

(3). In order to match the design structure of the cylinder 12, the outlet flow channel 112 is drilled upwards, and is misaligned with the direction drilled by the intake flow channel 111 instead of being on the same line. This kind of passage passing through the cylinder 12 turns The structure not only increases the manufacturing complexity, but also interferes with the circulation of the airflow, thus resulting in an increase in cost and a decrease in the quality of the airflow output.

Utility model content

An object of the present utility model is to provide a pneumatic tool which is easy to manufacture, low in cost, simple in structure for controlling gas circulation or cut-off, and good in airflow output quality.

Therefore, the pneumatic tool of the present utility model includes a body, a piston, and a trigger unit, and the body includes an inlet flow passage, an outlet flow passage, and a valve hole connected between the inlet flow passage and the outlet flow passage , the valve hole has an operating section intersecting with the outlet flow channel and extending out of the body.

The utility model is characterized in that: the piston is arranged in the air intake channel, and includes a top portion of the operating section that can protrude into the valve hole, and the pneumatic tool also includes an elastic element, which can continuously provide the piston a force against the valve hole, the trigger unit includes an exposed button, and a push rod extending from the button into the operating section of the valve hole, the push rod has an end that abuts against the top of the piston, The piston moves between an open position pushed away from the valve hole by the push rod and a closed position closing the valve hole.

The beneficial effect of the utility model is that: since the piston is arranged in the air intake channel, and can be pushed by the push rod to directly make the inlet and outlet air channels communicate with each other, the design of the inlet and outlet air channels can form a constant wire, which makes the manufacturing and processing much simpler. In addition, the button and the push rod only need to push the piston to run, and are not limited to other components and must be manufactured separately. Therefore, the structure of the button and the push rod is simple in manufacture. , can also be integrally formed, so it can fully meet the production requirements of easy manufacture, low cost, and simplified structure.

Description of drawings

Fig. 1 is a schematic diagram illustrating the structure of a conventional pneumatic tool;

Fig. 2 is a schematic diagram illustrating the first preferred embodiment of the utility model pneumatic tool;

Fig. 3 is a schematic diagram illustrating the structure of a piston in the above-mentioned first preferred embodiment;

Fig. 4 is a cross-sectional view illustrating the composition of a trigger unit in the above-mentioned first preferred embodiment;

Fig. 5 is a schematic diagram illustrating the use state of the above-mentioned first preferred embodiment;

Fig. 6 is a cross-sectional view illustrating a second preferred embodiment of the utility model pneumatic tool;

Fig. 7 is a schematic diagram illustrating the use state of the above-mentioned second preferred embodiment.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described in detail.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same numerals.

As shown in FIGS. 2 , 3 , and 4 , the first preferred embodiment of the pneumatic tool 200 of the present invention includes a body 20 , a piston 30 , an elastic element 40 , and a trigger unit 50 .

The body 20 includes an inlet flow channel 21, an outlet flow channel 22, a valve hole 23 connected between the inlet flow channel 21 and the outlet flow channel 22, and a valve hole 23 formed between the valve hole 23 and the inlet flow channel. Butt 24 between 21.

The valve hole 23 has an operating segment 231 intersecting with the outlet channel 22 and extending out of the body 20, and a valve segment 232 connected between the inlet channel 21 and the operating segment 231, the valve segment 232 The diameter of the inlet channel 21 is smaller than that of the intake channel 21. The shoulder portion 24 is formed between the valve section 232 and the intake channel 21. The intake channel 21, the valve section 232 of the valve hole 23 and the outlet channel 22 surround on an axis X.

The piston 30 is disposed in the intake air passage 21, and includes a top 31 protruding into the operating section 231 of the valve hole 23, a bottom 32 opposite to the top 31, and a steel ball disposed on the top 31. 33. An airtight ring 34 sleeved on the bottom 32 and facing the valve hole 23, and a plurality of convex ribs 35 and grooves 36 respectively formed between the top 31 and the bottom 32, the top 31 of the piston 30 To the bottom 32 is an integrally formed plastic material.

The elastic element 40 is a compression spring against the bottom 32 of the piston 30, which can continuously provide the force of the piston 30 against the valve hole 23, so that the piston 30 is against the valve hole 23 when not in use, When the high-pressure gas is filled into the intake channel 21 , the air-tight ring 34 can be abutted against the shoulder portion 24 , and the valve section 232 of the valve hole 23 is in a closed state.

The trigger unit 50 includes an exposed button 51 , a push rod 52 extending from the button 51 into the operating section 231 of the valve hole 23 , and a latch 53 .

The button 51 and the push rod 52 are integrally formed of plastic material, and the button 51 has a long through hole 511 extending along the operating section 231 of the valve hole 23 .

The push rod 52 has an end 521 and a guiding surface 522 surrounding the end 521 . The guiding surface 522 gradually shrinks toward the end 521 and abuts against the steel ball 33 of the piston 30 .

The pin 53 passes through the body 20 and the long through hole 511 .

As shown in Figures 2, 3, 4, and 5, the use of the present utility model will be further described below. During use, the piston 30 is pushed away from the valve hole 23 by the push rod 52 (as shown in Figure 5 ) shown) and a closed position (as shown in FIG. 2 ) that closes the valve hole 23 to move.

When the button 51 is not pressed by any external force, the air-tight ring 34 can be pressed against the shoulder portion 24 by the high-pressure gas filling, so the valve hole 23 will be in a closed state. No air flow enters, and when the user presses the button 51, the inclination of the guide surface 522 of the push rod 52 will make the piston 30 move downward, so that the air-tight ring 34 is separated from the shoulder portion 24, the The gas in the inlet flow channel 21 can pass through the groove 36 of the piston 30, so the high-pressure gas can enter the outlet flow channel 22 to form an air flow, and smoothly push the subsequent components. At this time, if the button 51 is released, the The piston 30 pushes upwards to close the valve hole 23, and at the same time pushes the push rod 52 back to its previous position.

As shown in Figures 6 and 7, the second preferred embodiment of the utility model pneumatic tool 200 will be further described below, wherein Figure 6 and Figure 7 respectively show the state of the button 51 before and after being pressed, the first The second preferred embodiment is roughly the same as the above-mentioned first preferred embodiment, except that the button 51 of the trigger unit 50 is made of plastic material, and the push rod 52 is made of metal material connected to the button 51. 51 and the push rod 52 are firmly connected to each other through embedded injection molding, and the trigger unit 50 also includes a collar 54 that fits the push rod 52 to penetrate, and the collar 54 fits in the operating section of the valve hole 23 231.

The push rod 52 is made of metal material, so it can improve the physical strength, and can also avoid stamping deformation and damage to the push rod 52 caused by the steel ball 33 when the high-pressure gas flows, thereby increasing the durable effect.

The collar 54 is used to reduce the force-bearing area of the push rod 52 facing the flow of high-pressure gas, so that it is easier to press the button 51 without being hindered by the air pressure of the high-pressure gas flow.

Therefore, it can be found through the description of the above structure and action that since the piston 30 is arranged in the intake air passage 21 and can be pushed by the push rod 52 to directly communicate the inlet and outlet air passages 21, 22 with each other, the The inlet and outlet air passages 21, 22 can be designed to form a straight line, which makes the manufacturing process much easier, does not need to make an inclined and turning air passage structure, and greatly reduces the interference when the air passes through. The piston 30 Complicated cutting and drilling are not required, plastics with lower cost can be used except for the steel ball 33 and the air-tight ring 34, and can be quickly manufactured by injection molding.

In addition, since the button 51 and the push rod 52 only need to push the piston 30 to operate, and are not limited to other components and must be manufactured separately, the button 51 and the push rod 52 are simple in structure during actual manufacture, and can be The integral molding is made of plastic materials, so the cost can be greatly reduced, and the production requirements of easy manufacture and simplified structure can be fully met.

Claims (9)

1. pneumatic tool, comprise a body, a piston, and trigger unit, this body comprises that an air inlet runner, one go out flow channel, and one be communicated in this air inlet runner and this and go out valve hole between the flow channel, this valve hole have one with this to go out flow channel staggered and extend to this external lever piece, it is characterized in that:

This piston is arranged in this air inlet runner, and comprises that one can protrude in the top of the lever piece in this valve hole;

This pneumatic tool also comprises a flexible member, the sustainable strength of this piston one towards this valve hole contact that provides of this flexible member; And

This trigger unit comprises a button that exposes, and push rod that extends into the lever piece in this valve hole from this button, this push rod has the top that an end is resisted against this piston, and this piston is subjected to that this push rod promotes and closes between the detent position in this valve hole mobile away from the enable possition and in this valve hole one.

2. pneumatic tool according to claim 1, it is characterized in that: the valve hole of this body also has a valve section that is communicated between this air inlet runner and this lever piece, the aperture of this valve section is less than this air inlet runner, and this body also comprises a shoulder that supports that is formed between this valve section and this air inlet runner.

3. pneumatic tool according to claim 2 is characterized in that: the valve section in the air inlet runner of this body, this valve hole and this go out flow channel around an axis.

4. pneumatic tool according to claim 1 is characterized in that: this piston also comprises a bottom in contrast to this top, and this flexible member is a compression spring that is resisted against this bottom.

5. pneumatic tool according to claim 1, it is characterized in that: the top of this piston to bottom is integrated plastic material, this piston comprises also that a steel ball that is arranged at this top, one are sheathed on this bottom and towards the gas-tight ring in this valve hole, and a plurality of fin and grooves that are formed at respectively between this top and bottom.

6. pneumatic tool according to claim 1, it is characterized in that: the button of this trigger unit to this push rod is integrated plastic material, this trigger unit also comprises a latch, this button has a long perforation of extending along the lever piece in this valve hole, and this latch is arranged in this body and the perforation of this length.

7. pneumatic tool according to claim 1 is characterized in that: the push rod of this trigger unit also has one around this terminal guiding face, and this guiding face is towards contract gradually bundle and be resisted against the top of this piston of this end.

8. pneumatic tool according to claim 1, it is characterized in that: the button of this trigger unit is a plastic material, this push rod is the metal material that is linked to this button, this trigger unit also comprises a latch, this button also has a long perforation of extending along the lever piece in this valve hole, and this latch is arranged in this body and the perforation of this length.

9. pneumatic tool according to claim 1 is characterized in that: this trigger unit also comprises a collar that cooperates this push rod to stretch through, and this collar is sleeved on the lever piece in this valve hole.

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