叶片式气动马达及气动工具

Abstract

本申请提供一种叶片式气动马达及气动工具，涉及机械加工制造技术领域。其中，该叶片式气动马达包括：外壳，其轴向上的两端分别设置有进气口和出气口，所述外壳的内部设置有腔体；叶片壳，其外径与所述腔体的内径适配，所述叶片壳的内部具有截面形状为长圆形的叶片腔，所述叶片壳上开设有进气部及出气部；和输出轴体，同轴设置于所述外壳及所述叶片腔内，且所述输出轴体的输出端延伸至所述外壳的所述出气口所在的一端，所述输出轴体具有与所述叶片腔同轴且对应的叶片活动部，所述叶片活动部的直径与所述叶片腔的短轴长度适配，且所述叶片活动部的圆周均匀开设有叶片槽，且每个叶片槽内安装有叶片，所述叶片的外端与所述叶片腔的腔壁活动密封。

Claims

1. A vane-type pneumatic motor characterized by, include: The outer casing has an air inlet and an air outlet at its two axial ends, and the interior of the outer casing has a cavity. The blade shell is axially through, and its outer diameter is adapted to the inner diameter of the cavity. The blade shell has a blade cavity with an elongated cross-sectional shape inside. The blade shell is provided with an air inlet communicating with the air inlet and an air outlet communicating with the air outlet. and An output shaft is coaxially disposed within the housing and the blade cavity, with the output end of the output shaft extending to the end of the housing where the air outlet is located. The output shaft has a blade movable part coaxial with and corresponding to the blade cavity. The diameter of the blade movable part is adapted to the short axis length of the blade cavity, and blade grooves are uniformly formed around the circumference of the blade movable part. Each blade groove is equipped with a blade that can move and extend radially within the blade groove. The outer end of the blade is movably sealed to the cavity wall of the blade cavity, so that an airflow channel is formed between adjacent blades, the blade movable part, and the cavity wall of the blade cavity.

2. A vane-type pneumatic motor according to claim 1, characterized in that Also includes: The first positioning sleeve is sleeved on the outside of the output shaft and fixed to the end face of the blade shell near the air outlet. The outer edge of the first positioning sleeve is provided with an air outlet notch corresponding to the air outlet part, and the air outlet notch communicates with the air outlet. The second positioning sleeve is sleeved on the outside of the output shaft and fixed to the end face of the blade shell near the air inlet. The edge of the second positioning sleeve is provided with an air inlet notch corresponding to the air inlet, and the air inlet notch is connected to the air inlet.

3. The vane-type pneumatic motor according to claim 2, characterized in that, The air outlet section includes two sets of air outlet holes, which are symmetrically arranged on the blade shell. Each set of air outlet holes includes a plurality of air outlet holes spaced apart along the axial direction of the blade shell.

4. The vane-type pneumatic motor according to claim 3, characterized in that, The outer surface of the blade shell is provided with two air inlet grooves. The two air inlet grooves are axially symmetrically arranged on the blade shell and alternately distributed with the two sets of air outlets. The air inlet grooves extend to the end of the blade shell near the second positioning sleeve and correspond to and communicate with the air inlet notch. The air intake section includes two rows of air intake hole groups, which are respectively disposed in the two air intake slots, and the air intake hole groups include a plurality of air intake holes spaced apart along the axial direction of the blade shell.

5. The vane-type pneumatic motor according to claim 1 or 2, characterized in that, The blade groove includes a main groove and a plurality of air holes. The blade is located in the main groove and its circumferential dimension is adapted to the main groove. The radial dimension of the blade is smaller than the depth of the main groove. The plurality of air holes are spaced apart along the axial direction of the output shaft. The air holes are partially located in the blade groove and their depth is greater than the depth of the main groove.

6. The vane-type pneumatic motor according to claim 2, characterized in that, The outer edge of the first positioning sleeve is provided with a positioning notch, and the end face of the blade shell facing the first positioning sleeve is provided with a first positioning hole corresponding to the positioning notch. A first positioning pin is inserted into the positioning notch and the first positioning hole; and / or, The first positioning sleeve and the surface opposite to the blade shell are respectively provided with second positioning holes, and second positioning pins are inserted into the two second positioning holes.

7. The vane-type pneumatic motor according to claim 2, characterized in that, The outer casing includes: The main body includes a first end and a second end that are opposite to each other in its axial direction. The output end of the output shaft passes through the port of the first end of the main body, and the air outlet is provided on the side wall of the main body near the first end in its axial direction. A connector, connected to the second end of the main body, and used to connect to the air inlet of an external device, wherein the central hole of the connector forms the air inlet.

8. The vane-type pneumatic motor according to claim 7, characterized in that, The main body includes an axially connected main body portion and a tapered end portion, and the output end of the output shaft passes through the port of the tapered end portion; The edge of the main body that connects with the conical end is provided with an air outlet groove corresponding to the air outlet notch, and the outer surface of the conical end is provided with an air outlet recess corresponding to the air outlet groove. The air outlet groove and the air outlet recess form the air outlet along the axial direction.

9. A vane-type pneumatic motor according to claim 8, characterized in that Also includes: The first bushing and the second bushing are respectively sleeved on the outside of both ends of the output shaft body for axial positioning of the output shaft. The first bushing is located inside the tapered end.

10. A pneumatic tool characterized by comprising: include: The blade-type pneumatic motor as described in any one of claims 1-9.

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