CN212421108U

CN212421108U - Butterfly pneumatic wrench

Info

Publication number: CN212421108U
Application number: CN202020933677.1U
Authority: CN
Inventors: 姜国城
Original assignee: Ningbo Steed Tools Co ltd
Current assignee: Ningbo Steed Tools Co ltd
Priority date: 2020-05-28
Filing date: 2020-05-28
Publication date: 2021-01-29
Anticipated expiration: 2030-05-28

Abstract

The utility model relates to a butterfly pneumatic wrench, which comprises a shell, a transmission shaft, a hammering component, a cylinder component, a switch component and an air inlet component; the shell comprises a shell body, a front sheath and a sealing cover; the front sheath is connected with the front end of the shell body, and the closing cover is connected with the rear end of the shell body; a containing cavity is formed in the shell, and the hammering assembly and the air cylinder assembly are arranged in the containing cavity; the cylinder assembly is connected with the hammering assembly, the front end of the transmission shaft penetrates out of the front sheath, and the rear end of the transmission shaft is connected with the hammering assembly; the switch assembly is arranged in the closed cover, and the air inlet assembly is connected with the closed cover. The technical scheme has the advantages of small and exquisite appearance, convenience in carrying and large torsion, is particularly suitable for being used by the elastic screws in a narrow space, is convenient and rapid to switch due to the integral structure of the forward and reverse rotating trigger, can be operated by one hand, adopts a single-hammer structure, is stable in transmission and long in service life.

Description

Butterfly pneumatic wrench

Technical Field

The utility model belongs to the technical field of pneumatic tool, especially indicate a butterfly-shaped pneumatic wrench machine that is used for pine, tight screw to use.

Background

The wind trigger is also called as a palm impact wrench, is particularly suitable for loosening and tightening screws, is widely applied to places of mines and maintenance, and comprises a large wind trigger and a small wind trigger, wherein the large wind trigger is heavy, usually 10Kg or more, and is used for loosening and tightening screws in large engineering, for loosening and tightening small screws, a small or mini wind trigger is used at present, but the torque of the small wind trigger used at present is insufficient, so that certain tightening screws or rusted screws cannot be loosened, and on the other hand, the shape of the small wind trigger cannot be suitable for loosening and tightening screws in narrow spaces or corners, so that the application of the small wind trigger is limited.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a butterfly wind trigger to solve the small-size wind trigger of prior art's torsion not enough and can not be applicable to narrow and small space, lead to the range of application to receive the problem of restriction.

The utility model discloses a realize through following technical scheme:

a butterfly-shaped pneumatic trigger comprises a shell, a transmission shaft, a hammering assembly, a cylinder assembly, a switch assembly and an air inlet assembly;

the shell comprises a shell body, a front sheath and a sealing cover; the front sheath is connected with the front end of the shell body, and the closed cover is connected with the rear end of the shell body;

an accommodating cavity is formed in the shell, and the hammering assembly and the air cylinder assembly are arranged in the accommodating cavity; the cylinder assembly is connected with the hammering assembly, the front end of the transmission shaft penetrates out of the front sheath, and the rear end of the transmission shaft is connected with the hammering assembly;

the switch assembly is arranged in the closed cover, and the air inlet assembly is connected with the closed cover.

The outer side wall of the shell body is provided with a first protruding portion, a first trigger rotating shaft hole is formed in the first protruding portion, a second protruding portion is arranged on the closed cover, and a second trigger rotating shaft hole is formed in the second protruding portion.

The hammering component comprises a hammering chamber, an impact pin, a cam and a hammering block; the hammering chamber is of a cylindrical structure with a groove in the side surface, the front side wall and the rear side wall of the groove are both provided with center holes, and the center holes are communicated with the groove;

the front side wall and the rear side wall are provided with opposite impact pin holes, the cam is arranged in the groove, and a central hole of the cam corresponds to a central hole of the front side wall and a central hole of the rear side wall; the striking block is arranged in the groove through an impact pin, and the impact block is matched with the cam.

The rear end of the transmission shaft penetrates through a center hole in the front side wall of the hammering chamber and is fixedly connected with the front end of the cam.

The air cylinder assembly comprises an air cylinder, a rotor, blades, a front cover and a rear cover, and the blades are arranged in the air cylinder together after being arranged on the rotor; the front cover and the rear cover are respectively arranged at the front end and the rear end of the cylinder, and an output shaft at the front end of the rotor penetrates through the front cover and is rotatably supported through a front bearing; a support shaft at the rear end of the rotor passes through the rear cover and is rotatably supported by the rear bearing; the rear cover is provided with an air inlet hole, the air inlet hole is connected with an air inlet channel on the sealing cover, the side wall of the air cylinder is provided with an air outlet hole, and the front end of the output shaft penetrates through a center hole in the rear side wall of the hammering chamber and is connected with the rear end of the cam.

An air inlet channel is arranged on the closed cover and comprises a main air inlet channel, a left air inlet channel and a right air inlet channel, and the left air inlet channel and the right air inlet channel are communicated with the main air inlet channel; a left switch component mounting channel and a right switch component mounting channel are arranged on the sealing cover; the left switch component mounting channel is communicated with the left air inlet channel, and the right switch component mounting channel is communicated with the right air inlet channel;

the left switch component mounting channel and the right switch component mounting channel are L-shaped and respectively comprise a horizontal part and a vertical part.

The switch assembly comprises a first opening and closing pin, a second opening and closing pin, a first opening and closing pin spring, a second opening and closing pin spring, a first ejector rod spring, a second ejector rod spring, a first ejector rod, a second ejector rod and a trigger;

the first opening and closing pin and the first opening and closing pin spring are installed in the horizontal part of the left switch component installation channel, and the first mandril spring are installed in the vertical part of the left switch component installation channel; the upper end of the first ejector rod penetrates out of the upper end of the sealing cover, and the lower end of the first ejector rod is matched with the first opening and closing pin;

the second opening and closing pin and the second opening and closing pin spring are installed in the horizontal part of the right switch component installation channel, and the second mandril spring are installed in the vertical part of the right switch component installation channel; the upper end of the second ejector rod penetrates out of the upper end of the sealing cover, and the lower end of the second ejector rod is matched with the second opening and closing pin;

the trigger is respectively connected with the first trigger rotating shaft hole and the second trigger rotating shaft hole through front and back trigger rotating shafts, and the trigger is respectively abutted to the first ejector rod and the second ejector rod.

The air inlet assembly comprises an air inlet joint and a flow regulator, the flow regulator is installed on the air inlet joint, and the air inlet joint is installed on an air inlet channel of the closed cover.

The utility model has the advantages that:

the technical scheme has the advantages of small and exquisite appearance, convenience in carrying and large torsion, is particularly suitable for being used by the elastic screws in a narrow space, is convenient and rapid to switch due to the integral structure of the forward and reverse rotating trigger, can be operated by one hand, adopts a single-hammer structure, is stable in transmission and long in service life.

Drawings

Fig. 1 is an exploded view of the butterfly pneumatic wrench of the present invention.

Description of the reference numerals

The structure of the oil seal comprises a shell body 1, an oil seal 2, a front sheath 3, an oil-containing shaft sleeve 4, a transmission shaft anti-drop ring 5, an O-shaped ring 6, a transmission shaft 7, a hammering chamber 8, a impacting pin 9, a hammering block 10, a cam 11, a bearing 12, a front cover 13, a cylinder pin 14, a rotor 15, a blade 16, a cylinder 17, a rear cover 18, a bearing 19, a sealing gasket 20, a trigger rotating shaft 21, a trigger 22, a trigger 23O-shaped ring, a first opening and closing pin 24, a first opening and closing pin spring 25, a second ejector pin spring 26, a second ejector pin 27, a snap ring 28E, an air inlet joint gasket 29, an O-shaped ring 30, an O-shaped ring 31, an air inlet joint 32, a cylindrical pin 33, a flow regulator 34, an O-shaped ring 35, a steel ball 36, a retaining sheet 37 pressure spring 38, a cross round head screw 39, a closed cover 40.

Detailed Description

The technical solutions of the present invention are described in detail below by way of examples, which are only exemplary and can be used only for explaining and explaining the technical solutions of the present invention, but should not be construed as limiting the technical solutions of the present invention.

As shown in FIG. 1, the application relates to a butterfly-shaped pneumatic trigger, which comprises a shell, a transmission shaft 7, a hammering assembly, a cylinder assembly, a switch assembly and an air inlet assembly.

The shell comprises a shell body 1, a front sheath 3 and a sealing cover 40; the front sheath is connected with the front end of the shell body, and the closing cover is connected with the rear end of the shell body; an oil seal 2 is arranged between the front sheath and the shell body, and an oil-containing shaft sleeve 4 is arranged at the front end of the shell body in threaded connection between the front sheath and the shell body.

The interior formation of casing holds the chamber, specifically by forming between casing body, preceding sheath and the closing cap and hold the chamber, beats subassembly and cylinder assembly and all sets up in holding the intracavity.

The middle part of the outer side of the shell body is provided with a first boss, the first boss is provided with a first trigger rotating shaft hole, the closed cover is provided with a second boss, and the second boss is provided with a second trigger rotating shaft hole. The first and second bosses are configured to mount the trigger 22.

In the technical scheme of this application, preceding sheath 3 is the taper pipe structure, is provided with axial centre bore, is provided with the internal thread at the rear end of axial centre bore for with the external screw thread cooperation of casing body front side.

The closing cap 40 is provided with a plurality of bolt holes for passing bolts to be connected with the housing body. Be provided with inlet channel in the top of closing cap, in this application, inlet channel includes main intake duct, is provided with the internal thread at the lower extreme of main intake duct for be connected with air inlet connector 32, be provided with the left intake duct and the right intake duct of intercommunication in the upper end of main intake duct, wherein left intake duct is used for the left air inlet intercommunication with the cylinder, and right intake duct is used for the right air inlet intercommunication with the cylinder.

The air intake assembly includes an air intake fitting 32, on which is mounted a flow regulator 34, which is mounted on the air intake passage of the closure.

The sealing cover is provided with a left switch component mounting channel and a right switch component mounting channel, the left switch component mounting channel and the right switch component mounting channel are both L-shaped and comprise a horizontal part and a vertical part, and the vertical part penetrates through the outer surface of the sealing cover. A gasket 20 is provided between the closure cap and the housing body.

The switch assembly includes a first switch pin 24, a second switch pin, a first switch pin spring 25, a second switch pin spring, a first push rod spring, a second push rod spring 26, a first push rod, a second push rod 27, and a trigger 22.

The first opening and closing pin and the first opening and closing pin spring are arranged in the horizontal part of the left switch component mounting channel, and the first ejector rod spring are arranged in the vertical part of the left switch component mounting channel; the upper end of the first ejector rod penetrates out of the upper end of the sealing cover, and the lower end of the first ejector rod is matched with the first opening and closing pin.

The trigger is of a rectangular plate structure, opposite circular arc-shaped bulges extending along the upper surface and the lower surface are arranged at the axial center line of the trigger, concave holes are formed in two ends of each circular arc-shaped bulge, one end of the front end of the trigger is inserted into the concave hole through a trigger rotating shaft 21, and the other end of the front end of the trigger is inserted into a first trigger rotating shaft hole; the rear end of the trigger is inserted into the concave hole through one end of the trigger rotating shaft, and the other end of the trigger rotating shaft is inserted into the second trigger rotating shaft hole. The trigger is rotationally arranged on the outer side of the shell and is rotationally connected with the shell through two trigger rotating shafts.

The cylinder component comprises a cylinder 17, a rotor 15, blades 16, a front cover 13 and a rear cover 18, and the blades are arranged in the cylinder together after being arranged on the rotor; the front cover and the rear cover are respectively arranged at the front end and the rear end of the cylinder, and an output shaft at the front end of the rotor penetrates through the front cover and is rotatably supported through the front bearing; a support shaft at the rear end of the rotor passes through the rear cover and is rotatably supported by the rear bearing; the rear cover is provided with a left air inlet hole and a right air inlet hole, the left air inlet hole is connected with a left air inlet channel on the sealing cover, the right air inlet hole is connected with a right air inlet channel on the sealing cover, and the side wall of the air cylinder is provided with an air outlet hole.

The hammering component comprises a hammering chamber 8, an impact pin 9, a cam 11 and a hammering block 10; the hammering chamber is of a cylindrical structure with a groove in the side face, a front center hole is formed in the front side wall of the groove, a rear center hole is formed in the rear side wall of the groove, and the front center hole and the rear center hole are communicated with the groove.

The cam and the striking block are arranged in the groove, the front side wall and the rear side wall are provided with opposite impact pin holes, and a central hole of the cam corresponds to the front central hole and the rear central hole; the striking block is arranged in the groove through an impact pin, and the impact block is matched with the cam.

An output shaft at the front end of the rotor penetrates through a rear center hole of the rear side wall and then is fixedly connected with the rear end of the cam, the front end of the transmission shaft penetrates through the front sheath, and the rear end of the transmission shaft penetrates through a front center hole of the front side wall and is fixedly connected with the front end of the cam. When the rotor rotates, the output shaft at the front end of the rotor drives the cam to rotate, the cam is in collision fit with the striking block when rotating, the striking block collides with the transmission shaft when rotating to generate striking vibration, and screws are conveniently loosened or screwed.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.

Claims

1. A butterfly-shaped pneumatic trigger is characterized by comprising a shell, a transmission shaft, a hammering assembly, a cylinder assembly, a switch assembly and an air inlet assembly;

2. The butterfly wind trigger of claim 1, wherein a first boss is provided on an outer side wall of the housing body, a first trigger rotation shaft hole is provided on the first boss, a second boss is provided on the closure, and a second trigger rotation shaft hole is provided on the second boss.

3. The butterfly wind trigger of claim 1, wherein the hammering assembly comprises a hammering chamber, a hammer pin, a cam, and a striking block; the hammering chamber is of a cylindrical structure with a groove in the side surface, the front side wall and the rear side wall of the groove are both provided with center holes, and the center holes are communicated with the groove;

the front side wall and the rear side wall are provided with opposite impact pin holes, the cam is arranged in the groove, and a central hole of the cam corresponds to a central hole of the front side wall and a central hole of the rear side wall; the striking block is arranged in the groove through an impact pin, and the striking block is matched with the cam.

4. The butterfly wind trigger of claim 3, wherein a rear end of the drive shaft passes through a central hole of a front sidewall of the hammering chamber and is fixedly connected with a front end of the cam.

5. The butterfly trigger of claim 3, wherein the cylinder assembly comprises a cylinder, a rotor, blades, a front cover and a rear cover, the blades being mounted on the rotor and then disposed together in the cylinder; the front cover and the rear cover are respectively arranged at the front end and the rear end of the cylinder, and an output shaft at the front end of the rotor penetrates through the front cover and is rotatably supported through a front bearing; a support shaft at the rear end of the rotor passes through the rear cover and is rotatably supported by the rear bearing; the rear cover is provided with an air inlet hole, the air inlet hole is connected with an air inlet channel on the sealing cover, the side wall of the air cylinder is provided with an air outlet hole, and the front end of the output shaft penetrates through a center hole in the rear side wall of the hammering chamber and is connected with the rear end of the cam.

6. The butterfly air trigger of claim 1, wherein an air inlet channel is arranged on the closing cover, the air inlet channel comprises a main air inlet channel, a left air inlet channel and a right air inlet channel, and the left air inlet channel and the right air inlet channel are both communicated with the main air inlet channel; a left switch component mounting channel and a right switch component mounting channel are arranged on the sealing cover; the left switch component mounting channel is communicated with the left air inlet channel, and the right switch component mounting channel is communicated with the right air inlet channel;

7. The butterfly wind trigger of claim 6, wherein the switch assembly comprises a first switch pin, a second switch pin, a first switch pin spring, a second switch pin spring, a first ejector spring, a second ejector spring, a first ejector, a second ejector, and a trigger;

8. The butterfly trigger of claim 6, wherein the air intake assembly comprises an air intake fitting and a flow regulator, the flow regulator being mounted on the air intake fitting, the air intake fitting being mounted on an air intake passage of the closure cap.