CN219402638U - Pneumatic file - Google Patents

Abstract

The utility model relates to the technical field of pneumatic tools, in particular to a pneumatic file which comprises a flexible transmission shaft, a lower shell and an upper shell, wherein the flexible transmission shaft is positioned between the upper shell and the lower shell, the flexible transmission shaft is connected with the upper shell and the lower shell in an assembling way, an eccentric flywheel is arranged in the lower shell, two sides of the eccentric flywheel are fixedly connected with rotating shafts, and a large bearing is arranged on an eccentric shaft on the rotating shaft. According to the utility model, through the appearance structures of the blowing assembly, the airflow guiding cover and the lower shell, an annular loop is formed after assembly, high-pressure air is guided to tangentially blow the eccentric flywheel so as to obtain larger mechanical energy to drive the flexible transmission shaft to reciprocate, the open flexible transmission shaft can effectively remove low-kinetic energy air, prevent excessive low-kinetic energy air from accumulating in the machine body, obstruct high-pressure air from flowing in, reduce the possibility of turbulent flow of air, and continuously and efficiently obtain mechanical energy.

Description

Pneumatic file

Technical Field

The utility model relates to the technical field of pneumatic tools, in particular to a pneumatic file.

Background

The small pneumatic file machine is a tool which uses high-pressure air as a power medium, converts the kinetic energy of the high-pressure air into mechanical energy through parts in the file machine and outputs the mechanical energy to drive the file to reciprocate so as to process a workpiece.

The prior art, such as the utility model of publication number CN213764276U, discloses a pneumatic file comprising: file subassembly, fixed subassembly, power component, file subassembly includes file, file holder tail end is equipped with the first bolt that is used for connecting power component, power component includes inside cylinder body, is located the outside cylinder body of inside cylinder body, inside cylinder body inside is equipped with the cylinder sliding block, one side that file subassembly was kept away from to inside cylinder body is equipped with the second stopper, the cylinder sliding block can slide in the cavity that second stopper, file holder formed, outside cylinder body top is equipped with the notch that admits air that is used for installing the subassembly that admits air, the inside cylinder body top is opened has with the matched with inlet port of subassembly that admits air. The pneumatic file disclosed by the utility model can reciprocate, the efficiency can be effectively improved, a workpiece can be processed according to requirements, and the reciprocating frequency can be effectively controlled.

In the prior art, the arrangement rationality of the internal structure of the small pneumatic file machine is insufficient, and after high-pressure gas enters the machine body, the gas circulation is unsmooth due to the fact that the gas turbulence is easy to generate, so that the file machine generates high-frequency vibration in an ineffective direction, the energy conversion rate is low, the hand feeling and the processing precision of a user are influenced, the service life of the file machine is shortened, and when the technical structure capable of improving the low energy conversion rate of the file is needed, the conversion and transmission device is generated.

Disclosure of Invention

The utility model aims to solve the defects that the internal structure arrangement of a small pneumatic file machine is not reasonable enough, and after high-pressure gas enters the machine body, the gas circulation is unsmooth due to the fact that the gas turbulence is easy to generate, so that the file machine generates high-frequency vibration in an ineffective direction, the energy conversion rate is low, the hand feeling and the processing precision of a user are influenced, and the service life of the file machine is shortened.

In order to achieve the above purpose, the present utility model adopts the following technical scheme: the utility model provides a pneumatic file, includes flexible drive shaft, inferior valve shell and last shell, flexible drive shaft is located between shell and the inferior valve shell, flexible drive shaft and last shell and inferior valve shell assembly connection, the inside of inferior valve shell is provided with eccentric flywheel, the equal fixedly connected with axis of rotation in both sides of eccentric flywheel, big bearing is installed to epaxial eccentric shaft of axis of rotation, install little bearing in the axis of rotation, the inside of going up shell and inferior valve shell is provided with the subassembly of blowing, the inside of subassembly of blowing is provided with the air inlet nozzle.

Preferably, a positioning groove is formed in the flexible transmission shaft, and a part of the large bearing is matched with the positioning groove.

Preferably, the inner wall of one side of the upper shell and the lower shell, which are close to each other, is provided with a clamping groove, and the small bearing is matched with the inner part of the clamping groove.

Preferably, the air current direction lid is installed through self tapping screw to flexible drive shaft's top, the air current direction lid cover is established on eccentric flywheel and big bearing, the air inlet tank has been seted up to the surface of air current direction lid, and flexible drive shaft and air current direction lid adopt the plastics material, and toughness is strong, and tensile, anti extrusion performance are superior, but the mould shaping improves production efficiency, and the air current direction is covered and is provided with the self tapping hole and makes the processing more convenient, and the assembly is simpler and more.

Preferably, the air flow guiding cover is positioned between the upper shell and the lower shell, and the air flow guiding cover is matched with the positioning groove to realize the assembly of the large bearing and the modular assembly of the equipment.

Preferably, the air blowing port of the air blowing assembly is of an arc-shaped structure, and the air blowing port is aligned with the external teeth of the eccentric flywheel at a tangential angle.

Preferably, the inner side of the external teeth of the eccentric flywheel is of a cambered surface structure, and the steps on the two sides and the external teeth are of an eccentric structure, so that high-pressure gas is reduced from diffusing to the two sides of the flywheel, and the obtained gas kinetic energy is effectively increased.

Compared with the prior art, the utility model has the advantages and positive effects that:

1. in the utility model, when the air file valve switch is opened, high-pressure air enters the air inlet channel of the air blowing assembly through the air inlet nozzle, and is sprayed out from the cambered surface air outlet at a high speed, the air blows the eccentric flywheel to axially rotate by the rotating shaft, the large bearing axially eccentrically rotates relative to the rotating shaft due to the eccentric flywheel step which is of an eccentric structure, the large bearing drives the flexible transmission shaft and the air flow guide cover to eccentrically rotate, the front section of the flexible transmission shaft is connected with the connecting rod, and the flexible transmission shaft generates reciprocating motion under the limitation of the linear bearing, and can stretch back and forth to obtain larger traction force because the flexible transmission shaft is made of flexible materials in the reciprocating motion process, the file is driven to finish the purpose of processing a workpiece, the air file switch is closed, the high-pressure air is blocked from entering the machine body, and the device stops working without a power source.

2. According to the utility model, through the appearance structures of the blowing assembly, the airflow guiding cover and the lower shell, an annular loop is formed after assembly, high-pressure air is guided to tangentially blow the eccentric flywheel, so that larger mechanical energy is obtained to drive the flexible transmission shaft to reciprocate, the open flexible transmission shaft can effectively remove low-kinetic energy air, excessive low-kinetic energy air is prevented from accumulating in the machine body, high-pressure air is prevented from flowing in, the possibility of turbulent flow formed by the air is reduced, and meanwhile, the mechanical energy is continuously and efficiently obtained.

3. The utility model has the advantages of simple structure, easy processing of parts, simple and convenient assembly, easy maintenance and easy replacement of accessories, and is easy to modify the structure of the traditional small pneumatic file machine.

Drawings

FIG. 1 is a schematic cross-sectional view of a pneumatic rasp according to the present utility model;

FIG. 2 is a schematic view showing a partial structure of a pneumatic rasp according to the present utility model;

fig. 3 is a schematic view showing an exploded structure of fig. 2 in the pneumatic rasp according to the present utility model.

Legend description:

1. a flexible drive shaft; 2. an air flow guiding cover; 3. an eccentric flywheel; 4. a rotating shaft; 5. an air blowing assembly; 6. an air inlet nozzle; 7. a small bearing; 8. a large bearing; 9. a lower housing; 10. and an upper housing.

Detailed Description

Referring to fig. 1-3, the present utility model provides a technical solution: a pneumatic file comprises a flexible transmission shaft 1, a lower shell 9 and an upper shell 10, wherein the flexible transmission shaft 1 is positioned between the upper shell 10 and the lower shell 9.

In this embodiment: the flexible transmission shaft 1 is assembled and connected with an upper shell 10 and a lower shell 9, an eccentric flywheel 3 is arranged in the lower shell 9, two sides of the eccentric flywheel 3 are fixedly connected with a rotating shaft 4, a large bearing 8 is arranged on an eccentric shaft on the rotating shaft 4, a small bearing 7 is arranged on the rotating shaft 4, an air blowing component 5 is arranged in the upper shell 10 and the lower shell 9, and an air inlet nozzle 6 is arranged in the air blowing component 5.

Preferably, the flexible transmission shaft 1 is provided with a positioning groove, and a part of the large bearing 8 is matched with the positioning groove.

Specifically, the inner wall of one side of the upper shell 10 and the lower shell 9, which are close to each other, is provided with a clamping groove, and the small bearing 7 is matched with the inner part of the clamping groove.

Specifically, the air current direction lid 2 is installed through self tapping screw to the top of flexible drive shaft 1, and air current direction lid 2 cover is established on eccentric flywheel 3 and big bearing 8, and the air inlet tank has been seted up to the surface of air current direction lid 2, and flexible drive shaft 1 and air current direction lid 2 adopt the plastics material, and toughness is strong, and tensile, anti extrusion performance are superior, but the mould shaping improves production efficiency, is provided with the self tapping hole on the air current direction lid 2 and makes the processing more convenient, and the assembly is simpler and more easy.

Specifically, the air flow guiding cover 2 is located between the upper shell 10 and the lower shell 9, and the air flow guiding cover 2 is matched with the positioning groove to realize the assembly of the large bearing 8, so that the modular assembly of equipment is realized.

Specifically, the air blowing port of the air blowing assembly 5 is of an arc-shaped structure, and the air blowing port is aligned with the external teeth of the eccentric flywheel 3 at a tangential angle.

Specifically, the inner side of the external teeth of the eccentric flywheel 3 is of a cambered surface structure, and the steps on the two sides and the external teeth are of an eccentric structure, so that high-pressure gas is reduced to diffuse to the two sides of the flywheel, and the obtained gas kinetic energy is effectively increased.

Working principle: when the air file valve switch is opened, high-pressure air enters the air inlet channel of the air blowing assembly 5 through the air inlet nozzle 6 and is sprayed out from the cambered surface air outlet at a high speed, the air blows the eccentric flywheel 3 to axially rotate by the rotating shaft 4, the large bearing 8 axially eccentrically rotates relative to the rotating shaft 4 due to the eccentric structure of the step of the eccentric flywheel 3, the large bearing 8 drives the flexible transmission shaft 1 and the air flow guide cover 2 to eccentrically rotate, the front section of the flexible transmission shaft 1 is connected with the connecting rod, the reciprocating motion is generated by the limitation of the linear bearing, the flexible transmission shaft 1 can stretch back and forth to obtain larger traction force because the flexible transmission shaft 1 is a flexible material in the reciprocating motion process, the file is driven to finish the purpose of processing a workpiece, the air valve switch is closed, the high-pressure air is blocked from entering the machine body, the device stops working without a power source, through the appearance structure of the blowing component 5, the airflow guiding cover 2 and the lower shell 9, an annular loop is formed after assembly, high-pressure air is guided to tangentially blow the eccentric flywheel 3 so as to obtain larger mechanical energy to drive the flexible transmission shaft 1 to reciprocate, the open flexible transmission shaft 1 can effectively remove low-kinetic energy air, excessive low-kinetic energy air is prevented from accumulating in a machine body, high-pressure air is prevented from flowing in, the possibility that air forms turbulence is reduced, mechanical energy is continuously and efficiently obtained, and the novel pneumatic file machine has the advantages of simple structure, easy processing of parts, simple and convenient assembly, easy maintenance, easy replacement of accessories and easy improvement of the structure of the conventional small pneumatic file machine.

Claims (7)

1. The utility model provides a pneumatic file, includes flexible drive shaft (1), lower shell (9) and last shell (10), its characterized in that: the novel air blowing device is characterized in that the flexible transmission shaft (1) is located between the upper shell (10) and the lower shell (9), the flexible transmission shaft (1) is connected with the upper shell (10) and the lower shell (9) in an assembling mode, an eccentric flywheel (3) is arranged in the lower shell (9), two sides of the eccentric flywheel (3) are fixedly connected with a rotating shaft (4), a large bearing (8) is installed on an eccentric shaft on the rotating shaft (4), a small bearing (7) is installed on the rotating shaft (4), an air blowing assembly (5) is arranged in the upper shell (10) and the lower shell (9), and an air inlet nozzle (6) is arranged in the air blowing assembly (5).

2. The pneumatic file of claim 1 wherein: and a positioning groove is formed in the flexible transmission shaft (1), and one part of the large bearing (8) is matched with the positioning groove.

3. The pneumatic file of claim 1 wherein: the inner wall of one side of the upper shell (10) and the lower shell (9) which are close to each other is provided with a clamping groove, and the small bearing (7) is matched with the inner part of the clamping groove.

4. The pneumatic file of claim 2 wherein: the self-tapping screw is arranged above the flexible transmission shaft (1) and is provided with an air flow guiding cover (2), the air flow guiding cover (2) is sleeved on the eccentric flywheel (3) and the large bearing (8), and the surface of the air flow guiding cover (2) is provided with an air inlet groove.

5. The pneumatic file of claim 4 wherein: the air flow guiding cover (2) is positioned between the upper shell (10) and the lower shell (9), and the air flow guiding cover (2) is matched with the positioning groove to realize the assembly of the large bearing (8).

6. The pneumatic file of claim 1 wherein: the air blowing port of the air blowing component (5) is of an arc-shaped structure.

7. The pneumatic file of claim 1 wherein: the inner side of the external teeth of the eccentric flywheel (3) is of a cambered surface structure, and the steps on the two sides and the external teeth are of an eccentric structure.