CN216975468U

CN216975468U - Pneumatic tool

Info

Publication number: CN216975468U
Application number: CN202220107485.4U
Authority: CN
Inventors: 徐志敏; 胡云
Original assignee: Zhejiang Zhengmao Pneumatic Machinery Co ltd
Current assignee: Zhejiang Zhengmao Pneumatic Machinery Co ltd
Priority date: 2022-01-15
Filing date: 2022-01-15
Publication date: 2022-07-15
Anticipated expiration: 2032-01-15

Abstract

The utility model belongs to the technical field of pneumatic tools, and particularly relates to a pneumatic tool, which comprises a machine body; the working shaft is rotatably arranged in the machine body, and one end of the working shaft extends to the outer side of the machine body; the circumferential surface of the working shaft is provided with a plurality of oil storage ring grooves which limit the movement of oil on the circumferential surface of the working shaft. Thereby through the motion of depositing the motion of fluid on the oil ring groove restriction working shaft global, make fluid can not flow the outer end of working shaft at the excessive speed, the outside of organism promptly to guarantee the lubricated of fluid to working shaft global, and reduce the waste of fluid. Meanwhile, the oil ring groove is arranged at a position close to the fixing part, so that lubricating oil can be stored between the working shaft and the fixing part, the friction and the contact between the working shaft and the machine body are effectively lubricated, and the abrasion between the working shaft and the machine body is reduced.

Description

Pneumatic tool

Technical Field

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

Background

Lubricating oil is usually coated on a working shaft of the conventional pneumatic tool and used for lubricating a contact surface of the working shaft and a machine body, so that the abrasion of the working shaft and the machine body is reduced, and the service life of the pneumatic tool is prolonged. However, when the working shaft rotates, because the effect of centrifugal force, the smooth surface of working shaft, the lubricating oil on the working shaft global can outwards move gradually, like the working shaft in the air circuit structure of the pneumatic wrench of chinese patent application No. 201020115426.9 to when lubricating oil all flows to the outer end of working shaft gradually, when the outside of organism promptly, owing to lack the lubrication of lubricated liquid, frictional force between working shaft and the organism can the grow, thereby increases the wearing and tearing between working shaft and the organism, reduces pneumatic tool's life.

Disclosure of Invention

The utility model aims to provide a pneumatic tool.

The purpose of the utility model is realized as follows:

a pneumatic tool comprising

A body;

the working shaft is rotatably arranged in the machine body, and one end of the working shaft extends to the outer side of the machine body;

the circumferential surface of the working shaft is provided with a plurality of oil storage ring grooves which limit the movement of oil on the circumferential surface of the working shaft.

Preferably, the front end of the machine body is provided with a fixing part for fixing the working shaft, and the oil storage ring groove is arranged at a position, close to the fixing part, of the working shaft.

Preferably, an air cylinder is arranged in the machine body, a rotating shaft is arranged on the air cylinder, the air cylinder drives the rotating shaft to rotate, and the rotating shaft drives the working shaft to rotate;

the rotating shaft is connected with the working shaft through a centering pin;

the outer end of the rotating shaft is formed with a first connecting hole, the inner end of the working shaft is formed with a second connecting hole, and two ends of the centering pin are respectively arranged in the first connecting hole and the second connecting hole.

Preferably, an oil storage cavity is further arranged in the working shaft, and the second connecting hole is communicated with the oil storage cavity.

Preferably, the oil outlet has been seted up on the global of working shaft, the oil outlet extends to the oil storage intracavity, and intercommunication oil storage chamber and working shaft are global, the fluid in the oil storage intracavity passes the oil outlet through centrifugal force and flows to working shaft global.

Preferably, the second connecting hole and the oil storage chamber are both located in the axial direction of the working shaft.

Preferably, the diameter of the second connecting hole is larger than the diameter of the oil reservoir chamber, and the diameter of the centering pin is located between the diameters of the second connecting hole and the oil reservoir chamber.

Compared with the prior art, the utility model has the outstanding and beneficial technical effects that:

1. the utility model limits the movement of oil on the peripheral surface of the working shaft through the oil storage ring groove, so that the oil cannot flow to the outer end of the working shaft, namely the outer side of the machine body too fast, thereby ensuring the lubrication of the peripheral surface of the working shaft by the oil and reducing the waste of the oil.

2. The oil ring groove is arranged close to the fixing part, so that lubricating oil can be stored between the working shaft and the fixing part, the friction and the contact between the working shaft and the machine body are effectively lubricated, and the abrasion of the working shaft and the machine body is reduced.

3. The utility model replaces the bearing at the connecting part of the rotating shaft and the working shaft with the centering pin, can simply connect the rotating shaft and the working shaft, keeps the centering action, and reduces the whole weight of the pneumatic tool while ensuring the stable coaxial rotation of the rotating shaft and the working shaft. Meanwhile, the whole centering pin is basically positioned inside the working shaft and the rotating shaft, so that the pneumatic tool does not have extra space for installing the centering pin when the installation space of one bearing is reduced, the whole size of the pneumatic tool can be reduced again, and the weight can be smaller.

4. The working shaft is also internally provided with an oil storage cavity, and oil in the oil storage cavity lubricates contact surfaces between the centering pin and the rotating shaft and between the centering pin and the working shaft, so that the abrasion of the centering pin, the rotating shaft and the working shaft is reduced, and the service life of a pneumatic tool is further prolonged.

Drawings

Fig. 1 is a schematic view of the overall structure of a pneumatic tool.

Fig. 2 is a cross-sectional view of the pneumatic tool.

Fig. 3 is an enlarged view of fig. 2 at a.

Fig. 4 is an exploded view of a pneumatic tool.

Fig. 5 is a schematic structural view of the connection structure.

Reference numerals: 1. a body; 2. a fixed part; 3. a cylinder; 4. a rotating shaft; 5. a working shaft; 6. a centering pin; 7. a first connection hole; 8. a second connection hole; 9. an oil storage chamber; 10. an oil outlet hole; 11. an oil storage ring groove.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

As shown in fig. 1 to 5, a pneumatic tool includes a machine body 1 and a coupling mechanism provided in the machine body 1, the coupling mechanism including a rotating shaft 4 and a working shaft 5. The rotating shaft 4 is connected to a cylinder 3 of the pneumatic tool, and the cylinder 3 drives the rotating shaft 4 to rotate. The working shaft 5 is connected with the rotating shaft 4, and the rotating shaft 4 drives the working shaft 5 to rotate, so that the operation of the pneumatic tool is realized.

The working shaft 5 of the conventional pneumatic tool is usually coated with lubricating oil for lubricating the contact surface between the working shaft 5 and the machine body 1, so that the abrasion between the working shaft 5 and the machine body 1 is reduced, and the service life of the pneumatic tool is prolonged. However, when the working shaft 5 rotates, the lubricating oil on the circumferential surface of the working shaft 5 gradually moves outwards due to the centrifugal force, so that when the lubricating oil gradually flows to the outer end of the working shaft 5, namely, the outer side of the machine body 1, the friction force between the working shaft 5 and the machine body 1 becomes large due to the lack of lubrication of the lubricating liquid, thereby increasing the abrasion between the working shaft 5 and the machine body 1 and reducing the service life of the pneumatic tool.

As shown in fig. 3, 4 and 5, in the present embodiment, a plurality of oil trap grooves 11 are disposed on the circumferential surface of the working shaft 5, and when oil flows into the oil trap grooves 11, the oil trap grooves 11 limit the movement of the oil on the circumferential surface of the working shaft 5, so that the oil does not flow to the outer end of the working shaft 5 too fast, i.e. the outer side of the machine body 1, thereby ensuring the lubrication of the oil on the circumferential surface of the working shaft 5 and reducing the waste of the oil.

Further, with reference to fig. 2 and 4, a fixing portion 2 is disposed at the front end of the machine body 1, the fixing portion 2 is used for fixing the working shaft 5, and the oil storage ring groove 11 is disposed at a position of the working shaft 5 close to the fixing portion 2. The fixing part 2 is a position where the machine body 1 contacts with the working shaft 5, so that the oil storage ring groove 11 is arranged at the position, lubricating oil can be stored between the working shaft 5 and the fixing part 2, friction and contact between the working shaft 5 and the machine body 1 are effectively lubricated, and abrasion of the working shaft 5 and the machine body 1 is reduced.

In the conventional pneumatic tool, three bearings are generally provided in the structure relating to both the rotating shaft 4 and the working shaft 5, respectively at the front and rear sides of the cylinder 3 and at the junction between the rotating shaft 4 and the working shaft 5. Wherein, the junction between axis of rotation 4 and the working shaft 5 also has shaft coupling to replace, and the effect is similar, is connecting axis of rotation 4 and working shaft 5 to and play the centering effect and make both coaxial rotations. Therefore, the pneumatic tool is large in overall size and heavy in weight due to the fact that the three bearings are arranged in the pneumatic tool.

In the present embodiment, as shown in fig. 3, the rotating shaft 4 is connected to the operating shaft 5 via a centering pin 6. Wherein, the outer end of the rotating shaft 4 is formed with a first connecting hole 7, the inner end of the working shaft 5 is formed with a second connecting hole 8, and two ends of the centering pin 6 are respectively arranged in the first connecting hole 7 and the second connecting hole 8.

Compared with the weight of the bearing and the shaft coupling, the weight of the centering pin 6 is smaller, so that the centering pin 6 replaces one of the bearings to simply connect the rotating shaft 4 and the working shaft 5, the centering effect is kept, the rotating shaft 4 and the working shaft 5 can stably and coaxially rotate, and the whole weight of the pneumatic tool is reduced. Meanwhile, the whole centering pin 6 is basically positioned inside the working shaft 5 and the rotating shaft 4, so that the pneumatic tool does not have extra space for installing the centering pin 6 while reducing the installation space of one bearing, the whole volume of the pneumatic tool can be reduced again, and the weight can be smaller.

As shown in fig. 3, an oil storage chamber 9 is further disposed in the working shaft 5, and the second connection hole 8 is communicated with the oil storage chamber 9. Can store lubricating oil in the oil storage chamber 9, when working shaft 5 rotated with axis of rotation 4, lubricating oil can flow in first connecting hole 7 and second connecting hole 8 through pivoted centrifugal force to lubricated between 6 and the axis of rotation 4 and centering pin 6 and the working shaft 5 between the contact surface, reduce centering pin 6, axis of rotation 4 and the wearing and tearing of 5 three of working shaft, and then prolong pneumatic tool's life.

As shown in fig. 3, the second connection hole 8 and the oil reservoir chamber 9 are both located in the axial direction of the working shaft 5. The distance between the two is shorter, and the lubricating liquid in the oil storage cavity 9 can flow to the second connecting hole 8 more quickly. Meanwhile, the design can facilitate the processing of a producer.

As shown in fig. 3, the diameter of the second connecting hole 8 is larger than the diameter of the oil storage chamber 9, and the diameter of the centering pin 6 is located between the diameters of the second connecting hole 8 and the oil storage chamber 9, so that when the centering pin 6 is disposed in the second connecting hole 8, the end of the oil storage chamber 9 blocks the centering pin 6, thereby restricting the movement of the centering pin 6 and preventing the deviation of the centering pin 6 during the movement of the pneumatic tool, which affects the use of the pneumatic tool. Meanwhile, the design can prevent the centering pin 6 from entering the oil storage cavity 9 and extruding oil, so that the oil overflows to influence the use of the oil storage cavity 9.

Further, combine fig. 3 and fig. 5, oil outlet 10 has still been seted up on the global of working shaft 5, oil outlet 10 extends to in the oil storage chamber 9, and intercommunication oil storage chamber 9 and working shaft 5 are global, fluid in the oil storage chamber 9 passes oil outlet 10 through centrifugal force and flows to working shaft 5 global to play lubricated working shaft 5 global and with the effect of the contact surface of pneumatic tool's organism 1.

The foregoing shows and describes the general principles and features of the present invention, together with the advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. A pneumatic tool comprising

A body (1);

the working shaft (5) is rotatably arranged in the machine body (1), and one end of the working shaft extends to the outer side of the machine body (1);

it is characterized in that the preparation method is characterized in that,

the peripheral surface of the working shaft (5) is provided with a plurality of oil retaining ring grooves (11), and the oil retaining ring grooves (11) limit the movement of oil on the peripheral surface of the working shaft (5).

2. A pneumatic tool as in claim 1, wherein: the front end of organism (1) is provided with fixed part (2) that are used for fixed working shaft (5), it sets up to deposit oil ring groove (11) working shaft (5) are close to the position of fixed part (2).

3. A pneumatic tool as claimed in claim 1 or 2, wherein: an air cylinder (3) is arranged in the machine body (1), a rotating shaft (4) is arranged on the air cylinder (3), the air cylinder (3) drives the rotating shaft (4) to rotate, and the rotating shaft (4) drives the working shaft (5) to rotate;

wherein the rotating shaft (4) is connected with the working shaft (5) through a centering pin (6);

the outer end of the rotating shaft (4) is formed with a first connecting hole (7), the inner end of the working shaft (5) is formed with a second connecting hole (8), and two ends of the centering pin (6) are respectively arranged in the first connecting hole (7) and the second connecting hole (8).

4. A pneumatic tool as in claim 3, wherein: still be provided with oil storage chamber (9) in working shaft (5), second connecting hole (8) with oil storage chamber (9) are linked together.

5. A pneumatic tool as in claim 4, wherein: oil outlet (10) have been seted up on working shaft (5) global, in oil outlet (10) extended to oil storage chamber (9), communicate oil storage chamber (9) and working shaft (5) global, fluid in oil storage chamber (9) passes oil outlet (10) through centrifugal force and flows to working shaft (5) global.

6. A pneumatic tool as in claim 4, wherein: and the second connecting hole (8) and the oil storage cavity (9) are both positioned in the axial direction of the working shaft (5).

7. A pneumatic tool as in claim 6, wherein: the diameter of the second connecting hole (8) is larger than that of the oil storage cavity (9), and the diameter of the centering pin (6) is located between the diameters of the second connecting hole (8) and the oil storage cavity (9).