TWM618174U - Pneumatic tool and its current direction switching device - Google Patents

Abstract

The present invention is an air flow direction switching device, which includes a valve sleeve, a direction rod and a latch assembly. The inner peripheral surface of the valve sleeve is recessed to form two positioning grooves. The sleeve is combined and has a receiving groove that is selectively linearly opposite to one of the positioning grooves. The latch assembly is arranged in the receiving groove and can extend out of the receiving groove through an elastic restoring force and extend into the receiving groove. The positioning groove of the receiving groove is linearly opposed to the valve sleeve and the direction rod, whereby the air flow direction switching device has a simple structure, is easy to manufacture, and is suitable for existing production equipment, so that the manufacturer does not need to reopen it. Therefore, the production cost can be greatly reduced, and the structure is simplified, the parts are not many, and the assembly can be easily completed, thereby providing an air flow direction switching device and a pneumatic tool.

Description

Pneumatic tool and its air flow direction switching device

The new model relates to a pneumatic tool, in particular to a pneumatic tool and its air flow direction switching device.

The existing pneumatic tool is provided with a cylinder, a pneumatic motor, and an air flow direction switching device. The air motor is arranged in the cylinder. The air flow direction switching device includes a valve sleeve and a direction rod. The space is connected, the direction rod is slidably arranged in the valve sleeve, and the front and back sliding of the direction rod can change the position of the airflow into the cylinder, thereby changing the forward and reverse direction of the pneumatic motor.

Among them, as shown in Figures 3-1 and 3-2 of China's New Patent No. M321349 (hereinafter referred to as the previous case), the existing pneumatic tools are also provided with a positioning structure, which includes a housing tube and a positioning element , A spring and a locking screw, wherein the accommodating tube system and the valve sleeve are integrally formed and formed on one side of the valve sleeve. The positioning element, the spring and the locking screw are sequentially transferred from the accommodating tube The end of the body away from the valve sleeve is inserted, and the locking screw is screwed to the end; at the same time, the direction rod is provided with two recesses spaced apart, so that when the direction rod slides relative to the valve sleeve, The positioning element can be latched with one of the grooves to produce a positioning effect.

However, the technical feature of the accommodating tube body and the valve sleeve being integrally formed causes the manufacturer to reopen the mold, and cannot use the existing mold for producing the valve sleeve to manufacture it. On the other hand, the previous proposal also mentions the housing The pipe body and the valve sleeve can also be in a screw-locked combination. However, in this way, the positioning structure 2 has complicated processing procedures and numerous parts.

In summary, the positioning structure of the air flow direction switching device of the existing pneumatic tool has problems such as high production cost, high processing complexity, and complicated assembly, but there are some areas that need to be improved.

In order to solve the problems of high production cost, high processing complexity, and complicated assembly in the positioning structure of the air flow direction switching device of the existing pneumatic tool, the present invention provides a pneumatic tool, that is, the air flow direction switching device, which effectively improves the above through simplified structural configuration. The problem is further explained as follows.

The present model provides an airflow direction switching device, which is assembled in a pneumatic tool, and the airflow direction switching device includes: A valve sleeve, the valve sleeve is a hollow tubular structure, and the inner circumferential surface of the valve sleeve is recessed to form two positioning grooves; A direction rod, the direction rod system can be slidably combined in the valve sleeve, and the direction rod is recessed to form a cavity, and the cavity is selectively connected with one of the positioning grooves along with the movement of the direction rod Straight opposite; and A detent component, the detent component is arranged in the accommodating groove of the direction rod, and the detent component can extend out of the accommodating groove through an elastic restoring force and extend into a positioning groove that is linearly opposite to the accommodating groove, By this, the valve sleeve and the direction rod are locked.

In the above-mentioned air flow direction switching device, the two positioning grooves are located close to one end of the valve sleeve, and each positioning groove is formed with a radial recess.

Further, in the above-mentioned air flow direction switching device, each of the positioning grooves is an annular groove.

Still further, in the above-mentioned air flow direction switching device, the latch assembly includes an elastic body and a positioning member. The elastic body and the positioning member are sequentially arranged in the receiving groove of the direction rod, and the positioning member can be installed in the receiving member. The valve sleeve and the direction rod are locked between the opening of the groove and one of the positioning grooves, and when the direction rod slides relative to the valve sleeve, the elastic body is in a compressed state.

Furthermore, the present invention also provides a pneumatic tool, which includes: A cylinder with an internal space; and An air flow direction switching device as described above, wherein the valve sleeve is provided with an air inlet and two air outlets at intervals, and the two air outlets are respectively communicated with the internal space of the cylinder, and the direction rod has a necked part and a baffle , The outer diameter of the necked part is smaller than the outer diameter of other parts of the direction rod, the baffle is annular and radially protrudes from the middle section of the necked part, and the baffle slides with the direction rod relative to the valve sleeve, And move between the two sides of the air inlet of the valve sleeve, so as to switch the air outlet communicated with the air inlet.

With the above technical features, since the two positioning grooves of the valve sleeve can be manufactured through existing molds, the valve sleeve can be manufactured by simple processing, and the airflow direction switching device has a simple structure, is easy to manufacture, and is suitable for existing The production equipment of the manufacturer does not need to reopen the mold, so the production cost can be greatly reduced, and the structure is simplified, and there are not many parts. It is easy to combine the valve sleeve with the body of the pneumatic tool after the production is completed. After the detent assembly is inserted into the pocket of the direction rod, the detent assembly is slightly compressed so that the direction rod can be inserted into the valve sleeve, and the assembly can be simply completed. In summary, the present invention effectively improves the performance of existing pneumatic tools The disadvantage is to provide a pneumatic tool and its air flow direction switching device.

In order to understand the technical features and practical effects of the present invention in detail, and to implement it in accordance with the content of the specification, the preferred embodiment shown in the drawings is further described in detail as follows:

The present model provides a pneumatic tool. The preferred embodiment is shown in Figs. There is a handle portion 11 and an accommodating portion 12 connected to each other; the cylinder 20 is arranged in the accommodating portion 12, and has an accommodating space 21 and two through holes 22, 22A, the two through holes 22, 22A Are respectively communicated with the accommodating space 21; the pneumatic motor 30 is rotatably arranged in the accommodating space 21 of the cylinder 20, and when the airflow enters the accommodating space 21 through different through holes 22, 22A, the pneumatic motor 30 The motor 30 rotates in different directions; the above description about the actuation function of the air motor 30 is the same as the prior art, so it will not be described in detail here.

Further, please refer to FIG. 2 and FIG. 4 to FIG. 6 in this case. The airflow direction switching device 40 is assembled in the main body 10 and is located between the handle portion 11 and the accommodating portion 12. The air flow direction switching device 40 includes a valve sleeve 41, a directional rod 42 and a latch assembly 43, wherein the valve sleeve 41 is a hollow tubular structure inserted into the body 10 and located in the handle portion 11 and Between the accommodating portions 12, in the preferred embodiment of the present invention, the valve sleeve 41 is connected to the bottom of the cylinder 20.

The valve sleeve 41 includes an air inlet 411, two air outlets 412, 412A, and two positioning grooves 413, 413A. The air inlet 411 is located on the bottom side of the valve sleeve 41 and is connected to the inside of the handle portion 11 of the body 10. The two air outlets 412, 412A communicate with the air inlet 411 through the space in the valve sleeve 41, and the two air outlets 412, 412A correspond to one of the through holes 22, 22A of the cylinder 20, respectively And therefore indirectly communicates with the accommodating space 21. In this way, high-pressure airflow can pass through the inside of the handle portion 11 of the body 10, through the air inlet 411, the two air outlets 412, 412A, and the two air outlets. The through holes 22, 22A enter the accommodating space 21; the two positioning grooves 413, 413A are recessed and formed at intervals on the inner peripheral surface of the valve sleeve 41. In a preferred embodiment of the present invention, the two positioning grooves 413, 413A are located close to one end of the valve sleeve 41, and each of the positioning grooves 413, 413A is formed by a radial recess. In addition, the two positioning grooves 413, 413A are respectively an annular groove and can penetrate a The inner hole grooving knife is processed and formed.

Further, as shown in FIGS. 4 to 6, the outer diameter of the direction rod 42 matches the inner diameter of the valve sleeve 41, and is slidably integrated in the valve sleeve 41, and the direction rod 42 has a necked part 421, a baffle 422, and a receiving groove 423, wherein the necked part 421 is recessed in the middle section of the direction rod 42 so that the outer diameter of the necked part 421 is smaller than the outer diameter of other parts of the direction rod 42; the The baffle 422 is annular and protrudes radially from the middle section of the necked portion 421. Since the outer diameter of the baffle 422 matches the inner diameter of the valve sleeve 41, the airflow enters the valve sleeve 41 through the air inlet 411 Then, blocked by the baffle 422, it can only pass through one of the air outlets 412, 412A and enter the cylinder 20, thereby controlling the rotation direction of the air motor 30 after being driven by the airflow. Further, the baffle 422 follows The direction rod 42 slides relative to the valve sleeve 41 and moves between the two sides of the air inlet 411 of the valve sleeve 41, thereby switching the air outlets 412, 412A connected to the air inlet 411, and switching the pneumatic The direction of rotation of the motor 30; the pocket 423 is radially recessed in the direction rod 42 at a position different from the necked portion 421, and the pocket 423 selectively follows the movement of the direction rod 42 Straightly opposite to one of the positioning grooves 413 and 413A.

As shown in Figures 4 to 6, the latch assembly 43 is disposed in the receiving slot 423 of the direction rod 42, and the latch assembly 43 can extend out of the receiving slot 423 through an elastic restoring force, and extend into and The positioning grooves 413 and 413A of the receiving groove 423 that are linearly opposed to each other can lock the valve sleeve 41 and the direction rod 42 to provide a positioning effect. Further, the locking assembly 43 includes an elastic body 431 and a positioning member 432. The elastic body 431 and the positioning member 432 are sequentially arranged in the receiving groove 423 of the direction rod 42. The positioning member 432 can be locked at the opening of the receiving groove 423 and between one of the positioning grooves 413 and 413A. The sleeve 41 and the direction rod 42, and when the direction rod 42 slides relative to the valve sleeve 41, the elastic body 431 is in a compressed state. In a preferred embodiment of the present invention, the elastic body 431 is a compression spring. The positioning member 432 is a bead.

With the above technical features, since the two positioning grooves 413, 413A of the valve sleeve 41 can be manufactured by using existing molds, the valve sleeve can be manufactured by simple processing, and the airflow direction switching device 40 has a simple structure and is easy to manufacture , And is suitable for existing production equipment, so that the manufacturer does not need to reopen the mold, so the production cost can be greatly reduced, and the structure is simplified, and there are not many parts. It is easy to combine the valve sleeve 41 with the body 10 after the production is completed. After inside, the latch assembly 43 is inserted into the receiving groove 423 of the direction rod 42, and the latch assembly 43 is slightly compressed so that the direction rod 42 can be inserted into the valve sleeve 41, and the assembly can be easily completed. As mentioned, the present invention effectively improves the shortcomings of the existing pneumatic tools, thereby providing a pneumatic tool and its air flow direction switching device 40.

The above are only the preferred embodiments of the present invention, and do not limit the present invention in any form. Anyone with ordinary knowledge in the relevant technical field can use the present invention without departing from the scope of the technical solution proposed by the present invention. The disclosed technical content is partially changed or modified equivalent embodiments without departing from the content of the technical solution of the present invention, and all still fall within the scope of the technical solution of the present invention.

10: body 11: Grip 12: Containment Department 20: cylinder 21: accommodating space 22, 22A: Through hole 30: Air motor 40: Airflow direction switching device 41: Valve sleeve 411: Air Inlet 412,412A: air outlet 413, 413A: positioning slot 42: Steering rod 421: Constriction 422: Block 423: Conveyor 43: Snap component 431: Elastomer 432: Positioning Piece

Figure 1 is a perspective view of a preferred embodiment of the present invention. Figure 2 is a perspective exploded view of a partial cross-section of a preferred embodiment of the present invention. Figure 3 is a partial cross-sectional side view of the preferred embodiment of the present invention. Fig. 4 is a partial enlarged view of Fig. 3. 5 and 6 are schematic diagrams of the operation of the preferred embodiment of the present invention.

11: Grip

20: cylinder

22, 22A: Through hole

41: Valve sleeve

411: Air Inlet

412,412A: air outlet

413, 413A: positioning slot

42: Steering rod

421: Constriction

422: Block

423: Conveyor

431: Elastomer

432: Positioning Piece

Claims (6)

An air flow direction switching device is assembled in a pneumatic tool, and the air flow direction switching device includes: A valve sleeve, the valve sleeve is a hollow tubular structure, and the inner circumferential surface of the valve sleeve is recessed to form two positioning grooves; A direction rod, the direction rod system can be slidably combined in the valve sleeve, and the direction rod is recessed to form a cavity, and the cavity is selectively connected with one of the positioning grooves along with the movement of the direction rod Straight opposite; and A detent component, the detent component is arranged in the accommodating groove of the direction rod, and the detent component can extend out of the accommodating groove through an elastic restoring force and extend into a positioning groove that is linearly opposite to the accommodating groove, By this, the valve sleeve and the direction rod are locked. The air flow direction switching device according to claim 1, wherein the two positioning grooves are located close to one end of the valve sleeve, and each of the positioning grooves is formed in a radially concave manner. The air flow direction switching device according to claim 1, wherein each of the positioning grooves is an annular groove. The air flow direction switching device according to claim 2, wherein each of the positioning grooves is an annular groove. The airflow direction switching device according to any one of claims 1 to 4, wherein the latch assembly includes an elastic body and a positioning member, and the elastic body and the positioning member are sequentially arranged in the groove of the direction rod The positioning member can clamp the valve sleeve and the direction rod between the opening of the receiving groove and one of the positioning grooves, and when the direction rod slides relative to the valve sleeve, the elastic body is in a compressed state. A pneumatic tool, which includes: A cylinder with an internal space; and An airflow direction switching device according to any one of claims 1 to 5, wherein the valve sleeve is provided with an air inlet and two air outlets at intervals, and the two air outlets are respectively communicated with the internal space of the cylinder, The direction rod has a necked part and a baffle, the outer diameter of the necked part is smaller than the outer diameter of other parts of the direction rod, the baffle is annular and radially protrudes from the middle section of the necked part, and the stop As the direction rod slides relative to the valve sleeve, the plate moves between the two sides of the air inlet of the valve sleeve, so as to switch the air outlet communicated with the air inlet.

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