TWM484638U - Blade type pneumatic motor cylinder - Google Patents

Description

Cylinder of vane air motor

The present invention relates to a vane type air motor, and more particularly to the cylinder structure creation of the vane type air motor.

At present, a vane type air motor used in a pneumatic tool is mainly provided with a vane rotor in an eccentrically disposed rotor chamber of a cylinder, and the vane rotor is set in a plurality of outer circumferences of a rotor body. The blade, the blade is pushed against the blade by the elastic member, so that the blade end abuts against the inner cylinder wall of the cylinder, thereby introducing pressurized gas into the cylinder to drive the vane rotor to rotate, providing external work required Rotating power.

In the above-mentioned vane type air motor, the shape and structure of the cylinder are special, so how to make the manufacture of the cylinder more time-saving and labor-saving and material saving is a key position for the development of the vane type gas motor. At present, the conventional cylinder manufacturing method mainly comprises the steps of: powder metallurgy means loading metal powder of a predetermined constituent material into a mold, and then pressing and heating to form a cylinder body with a circular hole in a predetermined shape, followed by grinding means. Machining the cylinder body to a predetermined shape and outer diameter, drilling an axially extending two-hole at a predetermined position of the cylinder body, and machining the inner hole of the cylinder body into a rotor chamber of a predetermined cylinder shape by a milling process. Thereafter, the outer end portions of the two air holes of one end of the cylinder blank body are respectively processed into a flow passage that communicates with the rotor chamber by a lathe processing means, and the end faces of the cylinder blank bodies are trimmed by grinding means to manufacture the cylinder.

However, in the manufacture of the cylinder of the front-wheeled air motor, the cylinder body with a circular inner hole is made by powder metallurgy, and the circular inner hole in the cylinder body is secondary processed by milling. The rotor chamber in a predetermined shape and bore diameter is time-consuming and labor-intensive in manufacturing, wastes materials, and has the disadvantage of high manufacturing cost, which is disadvantageous to the competitiveness of the product.

The main purpose of this creation is to provide a cylinder manufacturing method and structure of a vane-type air motor, and to create a solution to solve the conventional cylinder powder metallurgy forming cylinder body with a circular inner hole, and then by milling means The secondary processing of the circular inner bore of the cylinder body into the rotor chamber is time consuming and labor intensive and wastes materials.

In order to achieve the above objective, the cylinder structure of the vane air motor proposed by the present invention comprises a powder metallurgy primary forming cylinder having a rotor chamber, and the cylinder body is provided with two axial extensions on the rotor housing side. The air hole, the side end of the cylinder body is provided with two flow passages respectively extending from the end of one air hole to the side end of the rotor chamber.

By creating the cylinder structure of the front-leaf vane air motor, it is possible to manufacture a cylinder body with a rotor chamber in a powder metallurgy one-time forming, so that the cylinder body can be freed from subsequent machining to form a predetermined cylinder diameter and shape. Steps, to achieve the steps of reducing the process, saving time and labor and saving materials, and overcoming the cylinder body of the cylinder with the circular inner hole by powder metallurgy, and then rounding the cylinder body by milling The secondary processing of the inner hole into the rotor chamber is time consuming and labor intensive and wastes materials.

As shown in FIG. 1 and FIG. 2, a preferred embodiment of the cylinder of the inventive vane air motor is disclosed. The cylinder structure comprises a cylinder 10 having a rotor chamber 11 in a powder metallurgy forming process. The rotor chamber 11 is eccentrically disposed in the cylinder block 10 in an axial direction. The cylinder block 10 is provided with two axially extending air holes 12A and 12B on the rotor chamber 11 side, and the cylinder 10 side end is recessed. The two flow passages 13A, 13B extend from the ends of the corresponding air holes 12A, 12B to the side ends of the rotor chamber 11, respectively. In the preferred embodiment, the two air holes 12A, 12B are symmetric with the second flow passages 13A, 13B. arrangement.

By the construction of the front cylinder, the manufacturing method can be completed by the following manufacturing method. The specific implementation step of the manufacturing method is to integrally form the metal powder by heating and pressing the mold by a powder metallurgy forming method. a cylinder body having an eccentric rotor chamber, wherein the mold selected in the powder metallurgy forming method comprises a fixed mold, a movable mold and a core mold, wherein the fixed mold can provide metal powder to be placed therein, and the mold is set In the fixed mold, and the core mold has a forming rod portion corresponding to the shape of the rotor chamber, the movable mold can be driven to press the fixed mold and the core mold to pressurize the metal powder placed in the fixed mold to heat the metal powder. Forming a cylinder body having an eccentric rotor chamber; continuation, grinding the outer peripheral surface of the cylinder body to a predetermined outer diameter by grinding, and then drilling the side wall of the rotor chamber of the cylinder body by drilling means Two axially extending air holes are provided, and then the outer end portions of the two air holes at both ends of the cylinder blank body 1 to which the air holes have been drilled are respectively processed by a lathe processing means to form a flow path connecting the rotor chamber; The grinding means trims the end face of the cylinder body to form a cylinder block. Thereby, the manufacture of the cylinder has the effects of saving time and labor, saving materials and the like.

As shown in FIG. 1 and FIG. 3, in the preferred embodiment, the cylinder block 10 can form a cylinder. The cylinder block 10 is provided with an axially extending positioning hole 14 between the two air holes 12A and 12B. A plurality of through holes 15 are formed in the side wall of the cylinder 10 with respect to the other side of the two air holes 12A, 12B.

As shown in FIG. 4, the cylinder of the present invention is provided with a vane rotor 20 provided by the rotor chamber 11 of the cylinder block 10, wherein the vane rotor 20 is in the plurality of vanes 21 of the outer peripheral surface of the rotor body 21 thereof. The spring 22 is pushed down so that the end of each blade 21 abuts against the inner wall of the rotor chamber 11 of the cylinder 10 to form a vane air motor. When the vane air motor is applied to the pneumatic tool, the pressurized gas is introduced into the air hole 12A of the cylinder block 10, and enters the rotor chamber 11 via the flow passage 13A to drive the vane rotor 20 to rotate, and The rotating vane rotor drives the gas to be discharged from the other flow passage 13B into the other air hole 12B. In this manner, the vane rotor 20 is continuously rotated by the cylinder 10 of the cylinder to provide the rotational power required for external work. .

10‧‧‧Cylinder
11‧‧‧Rotor compartment
12A, 12B‧‧‧ stomata
13A, 13B‧‧‧ runners
14‧‧‧Positioning holes
15‧‧‧Perforation
20‧‧‧Foil rotor
21‧‧‧Rotor body
21‧‧‧ leaves
22‧‧‧ Spring

1 is a perspective view of a preferred embodiment of a cylinder of the present vane air motor. 2 is a schematic end plan view of a preferred embodiment of the cylinder of the vane air motor of FIG. 1. 3 is a side cross-sectional view showing a preferred embodiment of the cylinder of the vane air motor of FIG. 1. 4 is a side plan view showing a preferred embodiment of a cylinder of a vane type air motor shown in FIG. 1 in which a vane rotor is assembled.

10‧‧‧Cylinder

11‧‧‧Rotor compartment

12A, 12B‧‧‧ stomata

13A, 13B‧‧‧ runners

14‧‧‧Positioning holes

15‧‧‧Perforation

Claims (3)

A cylinder of a vane type air motor, comprising a cylinder body having a rotor chamber formed by powder metallurgy once formed, the rotor chamber being eccentrically disposed in the cylinder body in an axially penetrating shape, the cylinder body being in the rotor chamber The side is provided with two axially extending air holes, and the side ends of the cylinder body are recessed with two flow passages respectively extending from the corresponding end portions of the air holes to communicate with the side ends of the rotor chamber. The cylinder of a vane type air motor according to claim 1, wherein the two air holes and the two flow paths are symmetrically arranged in the cylinder. The cylinder of a vane type air motor according to claim 1 or 2, wherein the cylinder body forms a cylinder, and the cylinder body is provided with an axially extending positioning hole between the two air holes, and the cylinder body is opposite to the second body A plurality of perforations are provided on the other side wall of the air hole.