Patent Application
20090020003
The present invention relates to an anchor structure of rotation directing valve and particularly to the anchor structure formed on a valve bushing to anchor a rotation directing valve set in the valve bushing.
A conventional pneumatic tool has an anchor structure as shown in
As the anchor structure B has to be set in the drilled delimiting hole A on the housing 10, the housing 10 has to be made of rigid material such as the aluminum alloy in order to form the delimiting hole A through drilling. As a result, in the aspect of design, the housing 10 has to be made of rigid material in order to drill the delimiting hole A on it. Therefore, the anchor structure B can be set in the delimiting hole A. However, the housing made from rigid material is relatively heavier and can become a burden for the operators. Instead of the rigid material, making the housing 10 by light weight material such as the composite material can greatly reduce the burden to operators. However, the said anchor structure B to be used on the housing 10 made from the light weight material such as composite material is still not available yet on the market. Hence this issue is remained to be resolved in the industry.
The primary object of the present invention is to provide an anchor structure of rotation directing valve to be used on a pneumatic tool's housing made from a composite material. A valve bushing in the housing is set under the cylinder. A rotation directing valve held by the valve bushing is to control a pneumatic motor in clockwise or counterclockwise rotation by moving it back and forth to alter the flow direction of compressed air. The anchor structure is directly formed on the valve bushing to firmly hold the rotation directing valve.
To achieve the foregoing object the invention of the anchor structure is to be used on the pneumatic tool's housing made from a composite material. A valve bushing in the housing is set under the cylinder. A rotation directing valve held by the valve bushing is to control a pneumatic motor in clockwise or counterclockwise rotation by moving it back and forth to alter the flow direction of compressed air. In this invention, it is characterized that the anchor structure which is formed on the valve bushing anchors the rotation directing valve while the pneumatic motor rotates clockwise or counterclockwise.
The foregoing, as well as additional objects, features and advantages of the invention will be more readily apparent from the following detailed description, which proceeds with reference to the accompanying drawings.
The present invention aims to provide an anchor structure of a rotation directing valve to be used on a housing made from a composite material of a pneumatic tool 1 (referring to
According to an embodiment of the invention, the anchor structure 2 includes an anchor element 20, a holding duct 140, a spring 22 and a fastening screw 24. The rotation directing valve 16 has a plurality of grooves 160 corresponding to the anchor element 20 that are buckled by each other to anchor the rotation directing valve 16 to be firmly set in the valve bushing 14. Moreover, the holding duct 140 and the valve bushing 14 are formed in an integrated manner so that the valve bushing 14 and the anchor structure 2 also become an integrated body. In practice, the anchor structure 2 may also be fastened to the valve bushing 14 by screwing (through a screw and a screw hole). In addition, in the embodiment of the invention, the valve bushing 14 is fastened to the cylinder 12 through a fastening structure such as a screw and a screw hole (not shown in the drawings). In practice, the cylinder 12 and the valve bushing 14 may be formed in an integrated manner.
In short, the anchor structure 2 of the invention is directly formed on the valve bushing 14 in an integrated manner or fastened to the valve bushing 14 by screwing. Thus the limitation from the conventional pneumatic tool as its housing 10 has to be made from a rigid material such as aluminum alloy in order to provide a drilled delimiting hole for setting the anchor structure B can also be avoided. By forming the anchor structure 2 and the valve bushing 14 integrally or through screw fastening each other, the anchor structure 2 can be applied on a pneumatic tool's housing made from a composite material. Through this invention, the advantage of anchor structure 2 can be kept and the burden of tool's weight can be reduced to operators. It provides an important improvement over the conventional techniques.
While the preferred embodiment of the invention has been set forth for the purpose of disclosure, modifications of the disclosed embodiment of the invention as well as other embodiments thereof may occur to those skilled in the art. Accordingly, the appended claims are intended to cover all embodiments which do not depart from the spirit and scope of the invention.
