TWM605527U - Pneumatic motor with internal flow guide hole - Google Patents

Abstract

A pneumatic motor with inner guide holes, which has a cylinder, and a rotor is accommodated in the cylinder, and at the same time, two sides of the cylinder are respectively covered with a cover, the cover corresponding to the two rotors Each end is provided with a bearing, wherein the covers are provided with at least one orifice connecting the bearing and the cylinder, so that when the external driving gas quickly passes through the cylinder, the Venturi effect can be used The gas at the bearing is sucked back into the cylinder through the orifice, which not only ensures that the gas will not flow out through the bearings, but also improves the durability of the bearings, and because the orifices are provided In the inside of the covers, it can achieve the effect of waterproof and dustproof, so that the air motor can be used in humid or heavily polluted environments.

Description

Air motor with inner guide hole

This creation is related to a kind of air motor, especially a kind of air motor with inner guide hole for air tools.

General pneumatic tools, such as sanding machines, engraving machines, etc., are equipped with a pneumatic motor, where the pneumatic motor mainly has a cylinder, and the cylinder is penetrated with an air chamber, and the air chamber is accommodated There is a rotor, the rotor has a rotating shaft, the rotating shaft is sleeved with an impeller, and the two sides of the cylinder are respectively covered with a cover corresponding to the opening of the air chamber, and the cover is provided with a corresponding rotating shaft. A shaft hole is provided around the shaft hole with a bearing seat for inserting a bearing, so that the two ends of the rotating shaft can pass through the shaft hole to connect to the corresponding bearings, so that the rotor can rotate in the air chamber As a result, when the external driving gas quickly passes through the cylinder, the rotor can be driven to rotate to link the pneumatic work for operation.

However, when the conventional air motor is operating, the driving gas will inevitably invade the bearing housing through the gap between the shaft holes and the rotating shaft, and further pass through the bearings to escape outwards, and take away the bearings. The internal lubricating oil greatly reduces the durability of the bearings. In view of this, the existing air motor will have a perforation on the outer side of the bearing housing to guide the gas to flow out through the perforation, but this method is easy to make External moisture or dust invaded the air motor from the perforation, causing damage to the air motor. Therefore, the author of this case, after observing the above shortcomings, believed that the aforementioned air motor was really necessary for improvement. produce.

The purpose of this creation is to provide a pneumatic motor with internal diversion holes, which can guide the gas invaded into the bearing back to the cylinder to improve the durability of the bearing, and is waterproof and dustproof, which can be used in wet and heavy applications. Dirty environment.

In order to achieve the above-mentioned purpose, the air motor with inner guide hole provided by this creation includes a cylinder, and the cylinder is penetrated with an air chamber, the air chamber contains a rotor, and the rotor has a rotating shaft. At the same time, the two sides of the cylinder are respectively covered with a cover corresponding to the opening of the air chamber, wherein the cover has a bottom plate, and the bottom plate is penetrated with a shaft hole connecting the air chamber and surrounds the The shaft hole ring is provided with a ring wall. A groove is formed between the ring wall and the bottom plate. The groove contains a bearing so that the two ends of the shaft can pass through the shaft holes and be connected to The corresponding bearing allows the rotor to rotate in the gas chamber. In addition, the covers are provided with a shallow ring groove on the bottom surface of the groove adjacent to the shaft hole, and the shallow ring groove is penetrated At least one diversion hole connected to the air chamber.

For the air motor with inner diversion holes provided by this creation, when the external driving gas quickly passes through the air chamber and pushes the rotor to rotate, the venturi effect will be generated at the diversion holes, and The driving gas invaded from the gap between the shaft holes and the rotating shaft will be sucked back into the gas chamber through the shallow ring groove and the guide hole, thereby not only ensuring that the driving gas will not pass through the The bearings flow out to the outside, which can improve the durability of the bearings, and because the diversion holes are arranged inside the covers, it can achieve the effect of waterproof and dustproof, so that the air motor can be used in wet or heavy Dirty environment.

Please refer to Figure 1, Figure 2, and Figure 3, which are the perspective, exploded and cross-sectional views of the preferred embodiment of the present creation, which disclose a pneumatic motor 100 with an inner guide hole. The pneumatic motor The 100 series contains:

A cylinder 10, which has a gas chamber 11 penetrating through two sides, and at least one air inlet 12 communicating with the gas chamber 11 and at least one row communicating with the gas chamber 11 are penetrated on the circumference of the cylinder 10 Stoma 13.

A rotor 20, which is rotatably accommodated in the air chamber 11, wherein the rotor 20 has a rotating shaft 21, the rotating shaft 21 is sleeved with an impeller 22, and the circumferential side of the impeller 22 is provided with a compartment Plural blades 23.

Two covers 30 are respectively covered at the openings of the air chamber 11 on the two sides of the cylinder 10. Please refer to Fig. 4 at the same time. Each cover 30 has a bottom plate 31, and The bottom plate 31 is provided with a shaft hole 32 communicating with the air chamber 11, and at the same time, a ring wall 33 surrounds the shaft hole 32 on the outer side of the bottom plate 31, and is enclosed between the ring wall 33 and the bottom plate 31 There is a groove 34. A shallow ring groove 35 is provided on the bottom surface of the groove 34 adjacent to the shaft hole 32, and at least one diversion hole 36 connected to the air chamber 11 is penetrated in the shallow ring groove 35. In this embodiment, the guide hole 36 is arranged parallel to the axial direction of the shaft hole 32 and is located adjacent to the exhaust hole 12.

The two bearings 40 are respectively embedded in the grooves 34 of the covers 30, allowing the two ends of the rotating shaft 21 to pass through the shaft holes 32 of the covers 30 and then connect to the corresponding bearings 40, so that The rotor 20 can rotate in the air chamber 11.

In order to further understand the structural characteristics of this creation, the use of technical means and the expected effects, I hereby describe the usage of this creation. I believe that we can have a deeper and specific understanding of this creation from this, as follows:

Please refer to Figure 5 again, which is a schematic diagram of the use of the preferred embodiment of this creation. The air motor 100 can be installed in a pneumatic tool 200, such as a sander, a grinder, etc. For example, it mainly has a housing 201, the housing 201 is provided with a chamber 202 for installing the air motor 100, and the housing 201 is provided with a gas flow communicating with the chamber 202 Road 203, and the pneumatic tool 200 further includes an eccentric block 204, one end of the eccentric block 204 is connected to the shaft 21, and the other end of the eccentric block 204 is connected to a sanding wheel 205, so that when the user starts In the case of the pneumatic tool 200, the driving gas supplied from the outside enters the air chamber 11 through the gas flow passage 203 through the air inlet 12 and flows along the air chamber 11 to push the impeller 22 to drive the rotating shaft 21 to rotate. Then, the air chamber 11 is discharged from the exhaust hole 13, and the eccentric block 204 and the sanding wheel 205 can be driven to rotate through the rotor 20 to achieve the purpose of sanding operation.

Among them, please refer to Fig. 6 and Fig. 7 at the same time, which are schematic diagrams of the operation of the preferred embodiment of the present creation, because the covers 30 are penetrated in the shallow ring groove 35 to communicate with the air chamber 11 of the guide holes 36, so when the driving gas quickly passes through the gas chamber 11, the venturi effect will be generated at the guide holes 36 due to the difference in flow rate, and the shaft holes 32 and The driving gas that intrudes into the gap between the rotating shafts 21 will be sucked back into the air chamber 11 through the shallow annular groove 35 and the guide hole 36, thereby not only ensuring that the driving gas will not pass through the bearings 40 Outflow outwards, which can improve the durability of the bearings 40, and because the guide holes 36 are arranged inside the covers 30, the effect of waterproof and dustproof can be achieved, so that the air motor 100 can be used in Humid or heavily polluted environment.

Please refer to Figure 8 again, which is a cross-sectional view of another preferred embodiment of the present invention. The difference between the air motor 100 and the previous preferred embodiment is that the guide hole 36 faces the exhaust hole 13 The direction is gradually inclined from top to bottom to form an oblique hole, so that when the driving gas quickly passes through the gas chamber 11, the invading driving gas can be sucked back into the gas chamber 11 more smoothly.

Hereby, the characteristics of this creation and its expected effects are stated as follows:

In the air motor 100 with inner guide holes, when the external driving gas quickly passes through the air chamber 11 and pushes the rotor 20 to rotate, the venturi effect will be generated at the guide holes 36 at this time. The driving gas entering from the gap between the shaft holes 32 and the rotating shaft 21 will be sucked back into the air chamber 11 through the shallow ring groove 35 and the guide hole 36, thereby not only ensuring the driving The gas will not flow out through the bearings 40, but can improve the durability of the bearings 40, and because the diversion holes 36 are arranged inside the covers 30, the effect of waterproof and dustproof can be achieved , So that the air motor 100 can be used in humid or heavily polluted environments.

To sum up, this creation has its excellent advanced practicality among similar products. At the same time, we have checked the domestic and foreign technical data about this kind of structure, and the same structure has not been found in the literature. Therefore, This creation actually has the requirements for a new patent, and Yan has filed an application in accordance with the law.

However, the above is only one of the preferred and feasible embodiments of this creation, so any equivalent structural changes made in the application of this creation specification and the scope of patent application should be included in the patent scope of this creation.

100: Air motor 10: Cylinder 11: Air chamber 12: Air intake 13: Vent 20: Rotor 21: shaft 22: Impeller 23: blade 30: capping 31: bottom plate 32: Shaft hole 33: Ring Wall 34: Groove 35: Shallow ring groove 36: diversion hole 40: Bearing 200: pneumatic tools 201: Shell 202: Room 203: Gas flow channel 204: eccentric block 205: Sanding Wheel

Figure 1 is a perspective view of the preferred embodiment of this creation. Figure 2 is an exploded view of the preferred embodiment of this creation. Figure 3 is a cross-sectional view of the preferred embodiment of this creation. Figure 4 is a partial cross-sectional view of the cover of the preferred embodiment of this creation. Figure 5 is a schematic diagram of the use of the preferred embodiment of this creation. Figure 6 is a schematic diagram of the action of the preferred embodiment of this creation. Figure 7 is a schematic diagram of the action of the preferred embodiment of this creation. Figure 8 is a cross-sectional view of another preferred embodiment of this creation.

100: Air motor

10: Cylinder

11: Air chamber

12: Air intake

13: Vent

20: Rotor

21: shaft

22: Impeller

30: capping

31: bottom plate

32: Shaft hole

33: Ring Wall

34: Groove

35: Shallow ring groove

36: diversion hole

40: Bearing

Claims (4)

A pneumatic motor with inner guide holes, which includes a cylinder, and the cylinder is penetrated with an air chamber, the air chamber is accommodated with a rotor, the rotor has a rotating shaft, and the two sides of the cylinder correspond to the air The opening of the chamber is further covered with a cover, and the cover is provided with a bearing corresponding to the rotating shaft, so that the two ends of the rotating shaft can be connected to the corresponding bearing, and the rotor can be in the air chamber The main characteristics of rotation are: The covers have a bottom plate, and the bottom plate is penetrated with a shaft hole communicating with the air chamber, and at the same time, a ring wall surrounds the shaft hole on the outer side of the bottom plate, and is located between the ring wall and the bottom plate A groove is formed to accommodate the bearing, wherein a shallow ring groove is provided on the bottom surface of the groove adjacent to the shaft hole, and at least one air chamber is penetrated in the shallow ring groove The diversion hole. The pneumatic motor with inner guide hole according to claim 1, wherein the peripheral side of the cylinder is provided with at least one air inlet hole communicating with the air chamber and at least one exhaust hole communicating with the air chamber, The diversion hole is arranged adjacent to the exhaust hole. The air motor with inner diversion hole according to claim 1, wherein the diversion hole is arranged parallel to the axial direction of the shaft hole. According to the air motor with inner guide hole according to claim 1, wherein the guide hole is gradually inclined from top to bottom toward the exhaust hole to form an inclined hole.

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