CN217380656U

CN217380656U - Pneumatic motor of pneumatic wrench

Info

Publication number: CN217380656U
Application number: CN202221375993.7U
Authority: CN
Inventors: 徐志敏
Original assignee: Zhejiang Zhengmao Pneumatic Machinery Co ltd
Current assignee: Zhejiang Zhengmao Pneumatic Machinery Co ltd
Priority date: 2022-05-31
Filing date: 2022-05-31
Publication date: 2022-09-06
Anticipated expiration: 2032-05-31

Abstract

The utility model discloses a pneumatic motor of pneumatic spanner relates to pneumatic spanner technical field. The pneumatic motor of the pneumatic wrench comprises: the stator shell is provided with a first cover body and a second cover body at two ends respectively; the first cover body, its external end face has forward rotation air inlet and reversal air inlet used for making the gas enter the stator shell at least; and a second cover body; the stator shell is provided with a gas outlet for enabling gas to leave the stator shell; wherein the stator housing has at least: a housing having at least an outlet hole for outlet air; a rotor having both ends fixed to the first cover and the second cover and rotating in the housing, the rotor having at least a vent groove in an axial direction; and a vane disposed in the vent slot; the utility model provides an air motor of air wrench can not have the time delay and start.

Description

Pneumatic motor of pneumatic wrench

Technical Field

The utility model belongs to the technical field of pneumatic spanner, refer in particular to a pneumatic motor of pneumatic spanner.

Background

At present, the pneumatic motor of the existing pneumatic wrench is rotated by the wind striking blades which are guided into the pneumatic motor through the guide grooves on the inner side of the pneumatic motor housing. However, in practical use, the blade needs to extend out of the vent groove and the end part of the blade abuts against the inner wall of the shell, wind can impact the blade well, and the blade does not extend out of the vent groove and abuts against the inner wall of the shell when the pneumatic motor is just started, so that the efficiency of the conventional pneumatic motor is low when the pneumatic motor is started.

The utility model provides a blade can initiatively stretch out the air channel and support and lean on at the inboard pneumatic motor of shell to solve above-mentioned problem.

SUMMERY OF THE UTILITY MODEL

The utility model aims at: an air motor for starting a non-delayed air wrench is provided.

The purpose of the utility model is realized like this:

an air motor for an air wrench, comprising:

the stator shell is provided with a first cover body and a second cover body at two ends respectively;

the first cover body, its external end face has forward rotation air inlet and reversal air inlet used for making the gas enter the stator shell at least; and

a second cover body;

the stator shell is provided with a gas outlet for enabling gas to leave the stator shell;

wherein the stator housing has at least:

a housing having at least an outlet hole for outlet air;

a rotor having both ends fixed to the first cover and the second cover and rotating in the housing, the rotor having at least a vent groove in an axial direction; and

a vane disposed in the vent slot;

wherein the rotor further has at least a placement groove perpendicular to the rotor axis;

an elastic piece is arranged in the placing groove, and the end part of the elastic piece is abutted against the blade, so that the blade has a tendency of extending out of the placing groove.

Further, the bottom surface of the air duct is an arc-shaped surface;

the blade at least has an arc surface corresponding to the end surface of one side, which is contacted with the vent groove.

Further, the blade at least has an abutting groove which is arranged at the end part of the blade with the cambered surface;

the end of the elastic piece is abutted against the abutting groove.

Further, both ends of the shell are recessed with:

the first guide groove is used for guiding wind entering the stator shell to impact the blades so as to enable the rotor to rotate forwards; and the number of the first and second groups,

a second guide groove for guiding wind in the stator housing to impact the blades to reverse the rotor;

a first air passing port is arranged in the first guide groove and penetrates through the shell, and the first air passing port is communicated with the forward rotation air inlet;

and a second air passing port is arranged in the second guide groove and penetrates through the shell, and two ends of the second air passing port are communicated with the reverse air inlet.

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

the elastic piece is directly arranged on the blade and the vent groove, so that the elastic piece always presses the blade to abut against the inner side of the shell, the time that the blade extends out of the vent groove is saved, and the pneumatic wrench is started without delay.

Drawings

FIG. 1 is a schematic structural diagram of the first embodiment;

FIG. 2 is one of the schematic views of the stator housing construction;

FIG. 3 is a second schematic view of the stator housing;

FIG. 4 is a schematic view of a rotor according to the first embodiment;

FIG. 5 is an exploded view of a rotor and blades according to one embodiment.

In the figure: 1-a first cover; 2-a second cover body; 3-a stator housing; 11-an air inlet; 12-air outlet; 31-air outlet holes; 32-a housing; 33-a rotor; 34-a blade; 321-a first guide groove; 322-a second guide slot; 331-a vent slot; 341-abutment groove; 3211-first air passing port; 3221-a second air passing port; 3311-standing groove; 3312-an elastic member; 3313-curved surface.

Detailed Description

The present invention will be further described with reference to specific embodiments and drawings, but the present invention is not limited to these embodiments.

[ EXAMPLES one ]

In one embodiment, an air motor for actuating a non-delayed air wrench is provided.

Referring to fig. 1 in particular, fig. 1 is a schematic structural diagram of the first embodiment. As shown in fig. 1, the pneumatic motor provided in this embodiment includes a first cover 1, a stator housing 3, and a second cover 2. The first cover body 1 and the second cover body 2 are respectively sleeved at two ends of the stator shell 3.

As shown in fig. 1, a normal rotation intake port 11 and a reverse rotation intake port 12 for allowing gas to enter the stator housing 3 are provided on the outer end surface of the first cover 1. The surface of the stator housing 3 is provided with 3 air outlet holes 31 for discharging the air flow in the stator housing 3.

Fig. 2 is a first schematic structural view of the stator housing 3, and fig. 3 is a second schematic structural view of the stator housing 3. As shown in fig. 2-3, the stator housing 3 in both figures presents one end of the stator housing 3, respectively. It can be seen that the stator housing 3 comprises a casing 32, a rotor 33 and blades 34. The rotor 33 is disposed within the housing 32 and the vanes 34 extend partially into the body of the rotor 33 and abut the inside of the housing 32.

As shown in fig. 2 to 3, both ends of the housing 32 are recessed inward with a first guide groove 321 and a second guide groove 322. One end of the first guide slot 321 is provided with a first air passing opening 3211, the first air passing opening 3211 horizontally penetrates the casing 32, so that the two first guide slots 321 at the two ends of the casing 32 are conducted, and meanwhile, the first air passing opening 3211 corresponds to the positive rotation air inlet 11 on the first cover 1 in position and has the same size.

As shown in fig. 2-3, similarly, a second air passing opening 3221 is disposed at one end of the second guide slot 322, and the second air passing opening 3221 horizontally penetrates through the housing 32, so that the two second guide slots 322 at the two ends of the housing 32 are conducted, and meanwhile, the second air passing opening 3221 corresponds to the reversed air inlet 12 on the first cover 1 in position and has the same size.

As shown in fig. 2-3, when the pneumatic motor needs to rotate forward, when the air enters the stator housing 3 from the forward rotation air inlet 11, a part of the air flows clockwise along the first air passing port 3211 to the first air passing port 3211 at the other end of the rotor 33, and the other part of the air flows clockwise along the first guide groove 321, both the air flows impact the vane 34 clockwise, so that the rotor 33 rotates clockwise, and finally the air flows to the air outlet 31 to be discharged from the pneumatic motor.

In another case, when the air motor needs to be reversed, when the air flow enters the stator housing 3 from the reverse air inlet 12, a part of the air flow flows along the second air passing port 3221 to the second air passing port 3221 at the other end of the rotor 33, and another part of the air flow flows counterclockwise along the second guide groove 322, both the parts of the air flow impact the blade 34 counterclockwise, so that the rotor 33 rotates counterclockwise, and finally the air flows to the air outlet 31 to be discharged out of the air motor.

Fig. 4 is a schematic view of the rotor 33 according to the first embodiment. As shown in fig. 4, the rotor 33 is provided with 7 ventilation grooves 331, and the ventilation grooves 331 are used for placing the blades 34. The ventilation groove 331 has a placement groove 3311 disposed perpendicular to the ventilation groove 331 at the center thereof, and the placement groove 3311 is used for placing an elastic member 3312.

Fig. 5 is an exploded view of a rotor 33 and blades 34 according to the embodiment. As shown in fig. 4-5, the bottom surface of the air channel 331 is curved 3313, and the bottom surface of the vane 34 is also curved and can fit into the curved 3313 of the air channel 331. In addition, the middle of the cambered surface of the blade 34 is recessed with an abutting groove 341, and the position of the abutting groove 341 corresponds to the placing groove 3311. The elastic member 3312 has one end abutting against the inside of the placement groove 3311 and the other end abutting against the abutting groove 341. Such a design reduces the degree of compression of the elastic member 3312, which is beneficial to the service life of the elastic member 3312, and reduces the damage to the casing 32 caused by the blade 34 abutting against the inside of the casing 32, thereby avoiding scratching the inside of the casing 32.

With reference to fig. 1 to 5, the air flow can also flow in from the gap between the vent groove 331 and the holding groove 3311, thereby generating a certain pressing force to the blades 34 toward the inside of the housing 32.

The working principle is as follows: when the air motor rotates forwards, and the air enters the stator housing 3 from the forward rotation air inlet 11, a part of the air flows clockwise along the first air passing port 3211 to the first air passing port 3211 at the other end of the rotor 33, and the other part of the air flows clockwise along the first guide groove 321, and both parts of the air flow impact the blades 34 clockwise, so that the rotor 33 rotates clockwise, and finally the air flows to the air outlet 31 to be discharged from the air motor.

In another case, when the air motor needs to be rotated reversely, when the air flow enters the stator housing 3 from the reverse air inlet 12, a part of the air flow flows along the second air passing port 3221 to the second air passing port 3221 at the other end of the rotor 33, and another part of the air flow flows counterclockwise along the second guide groove 322, both the air flows impact the blade 34 counterclockwise, so that the rotor 33 rotates counterclockwise, and finally the air flows to the air outlet 31 to be discharged out of the air motor.

The above-mentioned embodiment is only the preferred embodiment of the present invention, and does not limit the protection scope of the present invention according to this, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. A pneumatic motor of a pneumatic wrench, comprising:

the stator comprises a stator shell (3), wherein a first cover body (1) and a second cover body (2) are respectively arranged at two ends of the stator shell in a covering mode;

a first cover body (1) having at least a forward rotation gas inlet (11) and a reverse rotation gas inlet (12) on the outer end surface thereof for introducing gas into the stator housing (3); and

a second cover (2);

the stator shell (3) is provided with an air outlet (13) for enabling air to leave the stator shell (3);

wherein the stator housing (3) has at least:

a housing (32) having at least an outlet hole (31) for discharging air;

a rotor (33) having both ends fixed to the first lid (1) and the second lid (2) and rotating in the housing (32), the rotor (33) having at least an axial ventilation groove (331); and

a vane (34) disposed in the vent slot (331);

wherein the rotor (33) further has at least a placing groove (3311) perpendicular to the axis of the rotor (33);

an elastic piece (3312) is arranged in the placing groove (3311), and the end part of the elastic piece abuts against the blade (34), so that the blade (34) has the tendency of extending out of the placing groove (3311).

2. The pneumatic motor of the air wrench as claimed in claim 1, wherein the bottom surface of the vent groove (331) is an arc-shaped surface (3313);

the blade (34) has at least an arc surface corresponding to an end surface of the vent groove (331) on a side contacting therewith.

3. The pneumatic motor of an air wrench as claimed in claim 2, wherein the blade (34) has at least an abutment groove (341), the abutment groove (341) being provided at an end portion of the blade (34) having a curved surface;

the end of the elastic piece (3312) is abutted against the abutting groove (341).

4. The pneumatic motor of a pneumatic wrench as claimed in claim 1, wherein the housing (32) is recessed at both ends thereof with:

a first guide groove (321) for guiding wind entering the stator housing (3) to impact the blade (34) and rotate the rotor (33) in the forward direction; and the number of the first and second groups,

a second guide groove (322) for guiding wind in the stator housing (3) to strike the blade (34) and rotate the rotor (33) in the reverse direction;

a first air passing port (3211) is formed in the first guide groove (321), penetrates through the shell (32), and the first air passing port (3211) is communicated with the forward rotation air inlet (11);

a second air passing port (3221) is arranged in the second guide groove (322), penetrates through the shell (32), and two ends of the second air passing port (3221) are communicated with the reverse air inlet (12).