CN216540987U

CN216540987U - Pneumatic drill combination body connecting device

Info

Publication number: CN216540987U
Application number: CN202123423700.6U
Authority: CN
Inventors: 姜国城
Original assignee: Ningbo Steed Tools Co ltd
Current assignee: Ningbo Steed Tools Co ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-05-17
Anticipated expiration: 2031-12-31

Abstract

The utility model discloses a pneumatic drill combination body connecting device, which comprises: the pneumatic drill comprises a handle body, a handle body and a handle, wherein the handle body comprises a pneumatic drill body and a handle part; the pneumatic drill body is internally provided with an accommodating cavity, the handle part is provided with an air inlet channel, the air inlet channel is connected with an external air source, and the air inlet channel is communicated with the accommodating cavity; the trigger assembly is arranged on the handle part and is used for controlling the connection or disconnection of the air inlet channel and the accommodating cavity; the air cylinder assembly is arranged in the air drill body, and an external air source drives a rotor of the air cylinder assembly to rotate; the transmission assembly is arranged at one end of the pneumatic drill body, which is far away from the handle part, and a rotor of the air cylinder assembly penetrates through the pneumatic drill body to be connected with a transmission shaft of the transmission assembly and drives the transmission assembly to rotate; and the drill chuck is connected with the transmission assembly, the transmission assembly can drive the drill chuck to rotate, and one end of the drill chuck, which is far away from the transmission assembly, is used for loading a drill bit. The utility model can realize higher power output and larger drill bit rotating force under the same air consumption condition.

Description

Pneumatic drill combination body connecting device

Technical Field

The utility model relates to the field of pneumatic drilling equipment, in particular to a pneumatic drilling combination body connecting device.

Background

The pneumatic drill uses compressed air as power to make the shear blade at the end part of the pneumatic drill reciprocate, thereby realizing the cutting operation of the material to be cut. The air drill is mainly applied to the places of casting, welding, building, hearth maintenance and the like.

In the prior art, an air drill needs an air source device to provide power, so that a certain working pressure is generated in the air drill, and the rotary motion of the air drill is realized; in general, the air supply device provides constant power, so that the working pressure generated in the air drill is kept constant, but in the conveying process of the air supply, power loss is caused, the problem of insufficient power for finally driving the drill chuck to rotate is caused, and the drill bit cannot effectively drill holes or perform other work.

Therefore, how to provide a pneumatic drill coupling device which can realize higher power output and larger drill bit rotating force under the same air consumption condition becomes a technical problem to be solved urgently in the field.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a coupling device of a pneumatic drill combined body, which can realize higher power output and larger drill bit rotating force under the condition of the same air consumption.

According to an aspect of the present invention, there is provided an air drill combination body coupling device, including:

the pneumatic drill comprises a handle body and a handle part, wherein the handle body comprises a pneumatic drill body and a handle part; an accommodating cavity is formed in the pneumatic drill body, an air inlet channel is formed in the handle part, the air inlet channel is connected with an external air source, and the air inlet channel is communicated with the accommodating cavity;

the trigger assembly is arranged on the handle part and is used for controlling the connection or disconnection of the air inlet channel and the accommodating cavity;

the cylinder assembly is arranged in the pneumatic drill body, and the external air source drives a rotor of the cylinder assembly to rotate;

the transmission assembly is arranged at one end of the pneumatic drill body, which is far away from the handle part, and a rotor of the air cylinder assembly penetrates through the pneumatic drill body to be connected with a transmission shaft of the transmission assembly and drives the transmission assembly to rotate; and

the drill chuck is connected with the transmission assembly, the transmission assembly can drive the drill chuck to rotate, and one end, far away from the transmission assembly, of the drill chuck is used for loading a drill bit.

Optionally, according to the air drill combination body coupling device of the present invention, the cylinder assembly includes a body liner, a cylinder and a rotor, the body liner is disposed in the accommodating cavity, the cylinder liner is disposed in the body liner, the rotor is disposed inside the cylinder, and the outer side wall of the rotor is provided with uniformly distributed blades;

the end part of the pneumatic drill body is also provided with an air inlet cavity communicated with the containing cavity, and the air inlet cavity is communicated with an air inlet channel in the handle part, so that the external air source drives the rotor to rotate through the blades.

Optionally, according to the coupling device of the air drill combined body of the present invention, a positioning groove is concavely disposed above an upper outer side wall of the air cylinder, a positioning rod is disposed in the positioning groove, and the positioning rod is embedded in an inner side wall of the body bushing.

Optionally, according to the coupling device for the air drill combined body, a front cover and a rear cover are respectively arranged at the front end and the rear end of the air cylinder, bearing grooves are respectively formed in the front cover and the rear cover, a first bearing and a second bearing are respectively sleeved at the two ends of the rotor, which extend out of the air cylinder, and the first bearing and the second bearing are respectively located in the two bearing grooves.

Optionally, according to the pneumatic drill combination body coupling device of the present invention, the transmission assembly further comprises a locking ring and a transmission shaft, the locking ring is in threaded connection with the body bushing; the transmission shaft is arranged in the locking ring, one end of the transmission shaft is connected with the rotor, the other end of the transmission shaft extends to the outer side of the locking ring and the drill chuck, the rotor can drive the transmission shaft to rotate, and the transmission shaft can drive the drill chuck to rotate.

Optionally, according to the coupling device for the air drill combined body, the transmission assembly further comprises two idle wheels and a gear ring, the gear ring is arranged in the locking ring, and gear teeth are uniformly distributed on the inner side wall of the gear ring;

the transmission shaft is close to the one end of rotor is equipped with the deceleration wheel, be equipped with the deceleration groove that the symmetry set up on the lateral wall of deceleration wheel, two the idler sets up respectively in two deceleration grooves, the tip of rotor stretch into to pass through the tooth of a cogwheel meshing transmission in the deceleration wheel and with two idlers, and two idlers still with the inside wall of ring gear passes through the tooth of a cogwheel meshing transmission, so that the rotor drives through two idlers the transmission shaft rotates.

Optionally, according to the coupling device for the air drill combined body, the handle portion comprises a grip, a spring, a tilt valve and an air inlet joint, the grip is connected with the air drill body, and the air inlet channel is arranged inside the grip;

the air inlet joint is arranged at the lower end of the air inlet channel, the inclined valve is arranged at the upper end of the air inlet channel, and the inclined valve can close the upper end of the air inlet channel;

the spring sets up tilt valve with between the inlet connection, be equipped with the slope valve pin on the tilt valve, the slope valve pin with trigger subassembly offsets, just trigger subassembly is through promoting the slope valve pin, so that the tilt valve opens inlet channel.

Optionally, according to the air drill combination body coupling device of the present invention, the trigger assembly includes a trigger block and an opening and closing pin, the trigger block is disposed on a side of the handle facing the drill chuck, the opening and closing pin is disposed on a side of the trigger block and extends toward an inside of the handle, and an end of the opening and closing pin is in contact with the inclined valve pin, the opening and closing pin can cause the inclined valve pin to open the air intake channel so that the air intake channel is communicated with an inside of the air cylinder.

Optionally, according to the coupling device for an air drill combined body, the trigger assembly further includes a valve seat and a forward/reverse rotation pipe, the valve seat is sleeved on the opening/closing pin, the forward/reverse rotation pipe is sleeved on the valve seat, the forward/reverse rotation pipe and the valve seat are both fixed in the handle, and the valve seat and the opening/closing pin slide relatively; a first airflow cavity is arranged between the side wall of the opening and closing pin and the inner side wall of the valve seat, and a second airflow cavity is arranged between the outer side wall of the valve seat and the inner side wall of the forward and reverse rotating pipe;

the forward and reverse rotation pipe is provided with an air inlet hole communicated with the air inlet cavity, the valve seat is provided with a butt joint hole corresponding to the air inlet hole, the butt joint hole is communicated with the first airflow cavity, and when the opening and closing pin moves inwards, the air inlet channel is communicated with the first airflow cavity;

the positive and negative rotation pipe is also provided with an exhaust hole for communicating the second airflow cavity with the inside of the cylinder, and the handle is internally provided with an air outlet channel corresponding to the exhaust hole.

Optionally, according to the coupling device for the air drill combined body, a direction rod is further fixed on the valve seat, the direction rod is located between the trigger block and the handle, a pulling block is arranged on the direction rod, and the pulling block is used for pulling the valve seat;

the number of the air inlets on the forward and reverse rotation pipe is two, and when the valve seat rotates, the butt joint hole can correspond to one of the air inlets so as to realize forward rotation or reverse rotation of the drill chuck.

The coupling device for the air drill combined body disclosed by the utility model has the beneficial effects that: the optimized and matched pneumatic motor set has higher efficiency and longer service life. The motion of the rotor is decelerated and torque-increased through the planetary gear pair, and then the drill chuck is driven to rotate through the transmission shaft. The drill chuck can realize higher power output under the same air consumption condition, the reached rotating speed is faster, and the corresponding rotating force is larger.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description, serve to explain the principles of the utility model.

FIG. 1 is a perspective view of the coupling device for an air drill assembly body disclosed in the present invention;

FIG. 2 is a front cross-sectional view of the air drill assembly body coupling disclosed in the present invention;

fig. 3 is an exploded view of the coupling device for the air drill assembly body disclosed in the present invention.

Description of reference numerals:

1-air drill body; 2-a resilient pin; 3-a joint bushing; 4-framework oil seal; 5-tilting the valve pin; 6-a tilt valve; 7-a spring; 8-a first O-ring; 9-a sound-deadening pad; 10-a gasket; 11-an air inlet connection; 12-a forward and reverse rotation tube; 13-a second O-ring; 14-E type retaining ring; 15-valve seat; 16-a pressure spring; 17-steel balls; an 18-directional bar; 19-a set screw; 20-a third O-ring; 21-opening and closing pin; 22-trigger block; 23-a body liner; 24-a decorative ring; 25-cylinder gasket; 26-a first bearing; 27-rear cover; 28-a rotor; 29-blade; 30-a cylinder; 31-a positioning rod; 32-a front cover; 33-a second bearing; 34-a third bearing; 35-V type gasket; 36-a gear ring; 37-an idler pulley; 38-solid cylindrical pin; 39-a drive shaft; 40-a fourth bearing; 41-locking ring; 42-a flat gasket; 43-a drill chuck; 44-countersunk head screws; 45-an air inlet cavity; 46-a vent hole; 47-air intake; 48-an intake passage; 49-docking hole.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the utility model, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

According to fig. 1 to 3, the present invention provides a coupling device for an air drill combined body, comprising:

the pneumatic drill comprises a handle body, a handle body and a handle, wherein the handle body comprises a pneumatic drill body 1 and a handle part, and the handle part is used for holding; the pneumatic drill comprises a pneumatic drill body 1 and is characterized in that an accommodating cavity is formed in the pneumatic drill body 1, an air inlet channel 48 is formed in a handle portion, the air inlet channel 48 is connected with an external air source, and the air inlet channel 48 is communicated with the accommodating cavity.

And a trigger assembly disposed on the handle portion for controlling the communication and disconnection of the air intake passage 48 with the receiving chamber.

And the air cylinder assembly is arranged inside the air drill body 1, and an external air source drives a rotor 28 of the air cylinder assembly to rotate.

And the transmission assembly is arranged at one end of the pneumatic drill body 1 far away from the handle part, and the rotor 28 of the cylinder assembly penetrates through the pneumatic drill body 1 to be connected with a transmission shaft 39 of the transmission assembly and drive the transmission assembly to rotate.

And the drill chuck 43, the drill chuck 43 is connected with the transmission assembly, and the transmission assembly can drive the drill chuck 43 to rotate, and one end of the drill chuck 43, which is far away from the transmission assembly, is used for loading a drill bit. As shown in fig. 1, a connecting hole is provided in the center of the drill chuck 43, and the axis of the connecting hole and the axis of the transmission shaft 39 are located on the same straight line and connected by a countersunk screw 44.

In the implementation, the air source enters the accommodating cavity through the air inlet channel 48 in the handle part and then drives the rotor 28 in the cylinder assembly to rotate, the rotor 28 drives the transmission shaft 39 in the transmission assembly to rotate in the rotating process, and as one end of the transmission shaft 39 is connected with the drill chuck 43, the transmission shaft 39 drives the drill chuck 43 to rotate, and different drill bits or other tools used in rotation are connected through the drill chuck 43.

Further, the cylinder assembly comprises a body lining 23, a cylinder 30 and a rotor 28, the body lining 23 is arranged in the accommodating cavity, the cylinder 30 is sleeved in the body lining 23, the rotor 28 is arranged inside the cylinder 30, and blades 29 which are uniformly distributed are arranged on the outer side wall of the rotor 28; the end of the air drill body 1 is also provided with an air inlet cavity 45 communicated with the containing cavity, and the air inlet cavity 45 is communicated with an air inlet channel 48 in the handle part, so that an external air source drives the rotor 28 to rotate through the blades 29. The end of the air drill body 1 is further provided with an air inlet cavity 45 communicated with the containing cavity, the air inlet cavity 45 is communicated with an air inlet channel 48 in the handle part, and a pipeline (not shown in the figure) for communicating the air flow channel with the air inlet cavity 45 is arranged at the joint of the air drill body 1 and the handle, so that an external air source drives the rotor 28 to rotate through the blades 29.

Furtherly again, cylinder 30's the concave constant head tank that is equipped with in top lateral wall top is equipped with locating lever 31 in the constant head tank, and locating lever 31 sets up with the inside wall gomphosis of body bush 23 to effectively fix a position through body bush 23 to cylinder 30's position, and can also prevent that the air current from driving cylinder 30 and rotating, avoid the invalid loss of air supply power.

Still further, the front end and the rear end of the cylinder 30 are respectively provided with a front cover 32 and a rear cover 27, bearing grooves are respectively formed in the front cover 32 and the rear cover 27, the two ends of the rotor 28 extending out of the cylinder 30 are respectively sleeved with a first bearing 26 and a second bearing 33, and the first bearing 26 and the second bearing 33 are respectively located in the two bearing grooves. The rear cover 27 is provided with an open slot communicated with the air inlet cavity 45 so as to facilitate the air flow to pass through, and when the air flow passes through the open slot, the moving direction of the air flow should form a certain included angle with the blade 29, so as to ensure that the air flow hits the blade 29, and the rotor 28 is driven to rotate. When setting up, be equipped with cylinder driving fit pad 25 between the tip of cylinder 30 and gas shear body, combine together with locating lever 31 for closely laminating between cylinder 30 and the gas shear body terminal surface, further restrict the rotation of cylinder 30, and be equipped with the slotted hole corresponding with the open slot on the cylinder driving fit pad 25.

Still further, the transmission assembly further comprises a locking ring 41 and a transmission shaft 39, wherein the locking ring 41 is in threaded connection with the body bushing 23; the transmission shaft 39 is arranged in the locking ring 41, one end of the transmission shaft 39 is connected with the rotor 28, the other end of the transmission shaft 39 extends to the outer side of the locking ring 41 and is connected with the drill chuck 43, the rotor 28 can drive the transmission shaft 39 to rotate, and the transmission shaft 39 can drive the drill chuck 43 to rotate. When the air flow is set, the locking ring 41 is screwed to the body sleeve 23, so that the decorative ring 24 is also set between the two to prevent the air flow from leaking. A flat gasket 42 is also arranged between the end surface of the drill chuck 43 and the end surface of the locking ring 41, and the flat gasket 42 is sleeved on the transmission shaft 39 so as to improve the connection strength between the two and avoid idle rotation of the transmission shaft 39.

Still further, the transmission assembly further comprises two idle wheels 37 and a gear ring 36, the gear ring 36 is arranged in the locking ring 41, and gear teeth are uniformly distributed on the inner side wall of the gear ring 36; one end of the transmission shaft 39, which is close to the rotor 28, is provided with a reduction gear, the side wall of the reduction gear is provided with reduction grooves which are symmetrically arranged, the two idle gears 37 are respectively arranged in the two reduction grooves through solid cylindrical pins 38, the end part of the rotor 28 extends into the reduction gear and is in gear meshing transmission with the two idle gears 37, and the two idle gears 37 are also in gear meshing transmission with the inner side wall of the gear ring 36, so that the rotor 28 drives the transmission shaft 39 to rotate through the two idle gears 37.

In practice, the planetary gear pair formed by the two idle gears 37 is used for reducing the speed and increasing the torque, so that the rotating speed of the transmission shaft 39 is increased, and the realization of higher power output is ensured under the same air consumption condition, so that the drill chuck 43 rotates rapidly, and the corresponding rotating force is higher. In order to facilitate the rotation of the transmission shaft 39 when provided, a plurality of fourth bearings 40 are provided between the side wall of the transmission shaft 39 and the inner side wall of the locking ring 41, and a third bearing 34 is provided between the outer side wall of the rotor 28 and the inner side wall of the gear ring 36. The gear ring 36 is lapped on the front cover 32 of the cylinder 30, and a V-shaped gasket 35 is arranged between the end surfaces of the two, the V-shaped gasket 35 can improve the sealing performance and the friction force between the two, and the position of the cylinder 30 is tightly limited by combining with the cylinder sealing gasket 25 at the rear cover 27 of the upper cylinder 30.

Further, the handle part comprises a handle, a spring 7, a tilting valve 6 and an air inlet joint 11, the handle is connected with the air drill body 1, and an air inlet channel 48 is arranged inside the handle; an intake joint 11 is provided at the lower end of the intake passage 48, a tilt valve 6 is provided at the upper end of the intake passage 48, and a skeleton oil seal 4 is provided between the tilt valve 6 and the end surface of the intake passage 48 so that the tilt valve 6 can close the upper end of the intake passage 48.

The spring 7 is arranged between the inclined valve 6 and the air inlet joint 11, the inclined valve 6 is provided with an inclined valve pin 5, the inclined valve pin 5 is abutted against the trigger assembly, and the trigger assembly pushes the inclined valve pin 5, so that the inclined valve 6 opens the air inlet channel 48. When the air-flow-path-sealing air inlet, the bottom of the handle is provided with a silencing pad 9 for reducing noise when air flow enters, and the air inlet joint 11 is arranged at the air flow path inlet and seals the air flow path inlet through the joint bush 3, the first O-ring 8 and the gasket 10.

Still further, the trigger assembly includes a trigger block 22 and an opening and closing pin 21, the trigger block 22 is disposed on a side of the grip facing the drill chuck 43, the opening and closing pin 21 is disposed on a side of the trigger block 22 and extends toward an inside of the grip, and an end of the opening and closing pin 21 contacts the inclined valve pin 5, the opening and closing pin 21 can urge the inclined valve pin 5 to open the air intake channel 48 so that the air intake channel 48 communicates with an inside of the air cylinder 30. In practice, since the inclined valve pin 5 is in inclined contact with the opening-closing pin 21 and there is also an inclined angle between the corresponding airflow channel and the opening-closing pin 21, when the opening-closing pin 21 moves inward, the inclined valve pin 5 will be pressed inward, so that an opening is formed between one end of the inclined valve 6 and the top of the airflow channel, and the airflow will flow along the opening to the intake cavity 45 and push the rotor 28 inside the accommodating cavity. After the trigger block 22 is released, the components such as the tilting valve 6 and the like are reset under the action of the spring 7, the air inlet channel 48 is closed, air flow can not enter, and the rotation is stopped immediately.

Furthermore, the trigger assembly also comprises a valve seat 15 and a forward and reverse rotation pipe 12, wherein the valve seat 15 is sleeved on the opening and closing pin 21, the forward and reverse rotation pipe 12 is sleeved on the valve seat 15, the forward and reverse rotation pipe 12 and the valve seat 15 are both fixed in the handle, and the valve seat 15 and the opening and closing pin 21 slide relatively; a first airflow cavity is arranged between the side wall of the opening and closing pin 21 and the inner side wall of the valve seat 15, and a second airflow cavity is arranged between the outer side wall of the valve seat 15 and the inner side wall of the forward and reverse rotation pipe 12; in order to further fix the valve seat 15 and the handle, a fixing groove is arranged on the valve seat 15, a fixing hole corresponding to the fixing groove is arranged on the handle, and the left and right movement of the valve seat 15 is limited in a mode that the elastic pin 2 penetrates through the fixing hole and the fixing groove.

The forward and reverse rotation pipe 12 is provided with an air inlet hole 47 communicated with the air inlet cavity 45, the valve seat 15 is provided with a butt joint hole 49 corresponding to the air inlet hole 47, the butt joint hole is communicated with the first airflow cavity, and when the opening and closing pin 21 moves inwards, the air inlet channel 48 is communicated with the first airflow cavity; the positive and negative rotation pipe 12 is further provided with an exhaust hole 46 for communicating the second airflow chamber with the inside of the cylinder 30, and an air outlet channel corresponding to the exhaust hole 46 is arranged in the handle.

In practice, as shown in fig. 2 and 3, the diameter of the end of the opening and closing pin 21 close to the inclined valve pin 5 is reduced, that is, the position of the first airflow chamber, and the diameter of the valve seat 15 is reduced, that is, the position of the second airflow chamber. When the opening and closing pin 21 moves inward and causes the tilt valve 6 to open the air flow passage, the first air flow chamber communicates with the air flow passage, the through hole in the valve seat 15 corresponds to the air intake hole 47 in the forward/reverse rotation pipe 12, and then the air flow flows toward the air intake chamber 45 along the through hole and the air intake hole 47; and then, combining the law of conservation of energy, if the air is required to be discharged, the air outlet 46 on the positive and negative rotation pipe 12 is directly communicated with the inside of the air cylinder 30, and the air enters the air cylinder 30 from the air inlet cavity 45 to drive the rotor 28 to rotate, flows to the handle along the air outlet 46 and is discharged from the bottom of the handle, so that the problem of explosion caused by overlarge air pressure inside the air shear body is avoided. When the air flow channel is arranged, the opening and closing pin 21 is provided with the third O-shaped ring 20 to improve the sealing property between the opening and closing pin 21 and the valve seat 15, and the valve seat 15 is provided with the second O-shaped ring 13 to improve the sealing property between the valve seat 15 and the forward and reverse rotation pipe 12 to ensure that the air in the air flow channel cannot leak; the E-shaped retaining ring 14 effectively functions to secure the valve seat 15 within the handle.

Furthermore, a direction rod 18 is fixed on the valve seat 15, the direction rod 18 is located between the trigger block 22 and the handle, and a pulling block is arranged on the direction rod 18 and used for pulling the valve seat 15; the number of the air inlet holes 47 on the forward and reverse rotation pipe 12 is two, and when the valve seat 15 rotates, the butt joint hole 49 can correspond to one of the air inlet holes 47, so that the drill chuck 43 can rotate forward or reversely. When the steering wheel is arranged, as shown in fig. 3, a waist-shaped hole is formed in the steering rod 18, a waist-shaped block is arranged at one end of the valve seat 15 and is positioned on the outer side of the handle, the steering rod 18 is sleeved on the valve seat 15 and is connected with the valve seat through a fixing screw 19 in a mode of penetrating through the side wall, and therefore stable connection between the steering rod 18 and the valve seat is achieved; in addition, the side wall of the waist-shaped block is also provided with a pressure spring hole, a pressure spring 16 is arranged in the pressure spring hole, a round steel ball 17 is arranged on the pressure spring 16, the side wall of the handle is provided with two indicating holes with the diameter smaller than that of the steel ball 17, two letters of 'F' and 'R' are respectively marked beside the indicating holes and respectively represent the positive rotation and the negative rotation of the drill chuck 43, when the valve seat 15 is stirred to rotate through the direction rod 18, the steel ball 17 is extruded into the pressure spring hole by the inner wall of the handle, and when the axis of the pressure spring hole and the axis of the indicating hole are positioned on the same straight line, the steel ball 17 is embedded into different indicating holes under the action of the pressure spring 16 so as to realize the positive rotation and the negative rotation of the drill chuck 43.

Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the utility model. The scope of the utility model is defined by the appended claims.

Claims

1. An air drill combination body coupling device, comprising:

2. The air drill combination body coupling device of claim 1, wherein the cylinder assembly includes a body liner disposed within the receiving cavity, a cylinder disposed within the body liner, and a rotor disposed within the cylinder with uniformly distributed vanes on an outer sidewall of the rotor;

3. The pneumatic drill combination body coupling device of claim 2, wherein a positioning groove is concavely formed above an upper outer side wall of the cylinder, a positioning rod is arranged in the positioning groove, and the positioning rod is embedded with an inner side wall of the body bushing.

4. The air drill combination body coupling device of claim 2, wherein the front end and the rear end of the air cylinder are respectively provided with a front cover and a rear cover, the front cover and the rear cover are respectively provided with a bearing groove, the two ends of the rotor extending out of the air cylinder are respectively sleeved with a first bearing and a second bearing, and the first bearing and the second bearing are respectively positioned in the two bearing grooves.

5. The air drill combination body coupling device of claim 2, wherein the drive assembly further comprises a locking ring and a drive shaft, the locking ring being threadedly connected to the body bushing; the transmission shaft is arranged in the locking ring, one end of the transmission shaft is connected with the rotor, the other end of the transmission shaft extends to the outer side of the locking ring and the drill chuck, the rotor can drive the transmission shaft to rotate, and the transmission shaft can drive the drill chuck to rotate.

6. The air drill combination body coupling device of claim 5, wherein the transmission assembly further comprises two idler gears and a gear ring, the gear ring is disposed within the locking ring, and the gear teeth are uniformly distributed on the inner side wall of the gear ring;

7. The air drill combination body coupling device of claim 1, wherein the handle portion comprises a grip, a spring, a tilt valve, and an air intake joint, the grip is connected with the air drill body, and the air intake channel is disposed inside the grip;

8. The air drill combination body coupling device of claim 7, wherein the trigger assembly includes a trigger block disposed on a side of the grip facing the drill chuck and an opening and closing pin disposed on a side of the trigger block and extending toward an interior of the grip, and an end of the opening and closing pin is in contact with the inclined valve pin, the opening and closing pin being capable of urging the inclined valve pin to open the air intake channel such that the air intake channel communicates with the interior of the cylinder.

9. The air drill combination body coupling device of claim 8, wherein the trigger assembly further comprises a valve seat and a forward/reverse rotation tube, wherein the valve seat is sleeved on the opening/closing pin, the forward/reverse rotation tube is sleeved on the valve seat, the forward/reverse rotation tube and the valve seat are both fixed in the handle, and the valve seat and the opening/closing pin slide relatively; a first airflow cavity is arranged between the side wall of the opening and closing pin and the inner side wall of the valve seat, and a second airflow cavity is arranged between the outer side wall of the valve seat and the inner side wall of the forward and reverse rotating pipe;

the forward and reverse rotation pipe is provided with an air inlet communicated with the accommodating cavity, the valve seat is provided with a butt joint hole corresponding to the air inlet, the butt joint hole is communicated with the first airflow cavity, and when the opening and closing pin moves inwards, the air inlet channel is communicated with the first airflow cavity;

10. The air drill combination body coupling device of claim 9, wherein a direction lever is further fixed to the valve seat, the direction lever is located between the trigger block and the grip, and a pulling block is provided on the direction lever, the pulling block being used for pulling the valve seat;