Pneumatic control drilling mechanism

Abstract

The utility model relates to the technical field of pneumatic drilling, in particular to a pneumatic control drilling mechanism. According to the technical scheme, the device comprises an air compressor, a pneumatic motor and a drill rod, the air compressor is fixed to the tail end of the pneumatic motor, the drill rod is rotationally connected to the output end of the pneumatic motor, a drill bit is fixed to the end of the drill rod, and a connecting pipe is fixed between the air compressor and an air inlet of the pneumatic motor; a rotating plate is fixed to the periphery of the end, close to the pneumatic motor, of the drill rod, a pair of peripheral plates is fixed to the periphery of the front end of the pneumatic motor, brake plates are arranged on the inner sides of the peripheral plates, an electromagnetic three-way valve is fixed to the connecting pipe, and brake air pipes are fixed between the electromagnetic three-way valve and the peripheral plates. The pneumatic braking structure is arranged on the periphery of the drill rod, braking of the drill bit can be achieved by changing the airflow direction after drilling is finished, continuous rotation of the drill bit due to inertia is avoided, and drilling precision and safety are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic drilling, in particular to a pneumatic controlled drilling mechanism. Background Art

[0002] Pneumatic drilling is a process that uses compressed air as a power source for drilling. During the pneumatic drilling process, compressed air is delivered to the pneumatic drill, which drives the drill bit to rotate through the pneumatic motor, thereby drilling the workpiece.

[0003] Common pneumatic drilling is used to drill holes in the mortise and tenon structure of wood. There are certain requirements for the processing accuracy. However, there is no corresponding drill brake structure on the pneumatic drilling equipment. Compressed gas is used to drive the drill rod to rotate. Even after the gas injection is stopped, the drill rod will still rotate for a certain period of time due to inertia. At this time, continuous rotation will reduce the accuracy of the drilling size. At the same time, the drill bit cannot be stopped immediately, and there are certain safety risks for the processing operators. Utility Model Content

[0004] The utility model aims to provide a pneumatically controlled drilling mechanism in view of the problems existing in the background technology.

[0005] The technical solution of the utility model is as follows: a pneumatically controlled drilling mechanism, comprising an air compressor, an air motor and a drill rod, the air compressor being fixed at the end of the air motor, the drill rod being rotatably connected to the output end of the air motor, a drill bit being fixed at the end of the drill rod, a connecting pipe being fixed between the air compressor and the air inlet of the air motor, a rotating plate being fixed to the periphery of one end of the drill rod close to the air motor, a pair of outer plates being fixed to the periphery of the front end of the air motor, a brake plate being arranged on the inner side of the outer plate, an electromagnetic three-way valve being fixed on the connecting pipe, and a brake air pipe being fixed between the electromagnetic three-way valve and the outer plate.

[0006] Preferably, a telescopic groove is opened on the inner side of the outer plate, the outer side of the brake plate is slidably connected in the telescopic groove, a fixed frame is fixed to the inner wall of the telescopic groove, the end of the brake air pipe is fixed on the fixed frame, a piston plate is slidably connected in the fixed frame, and a connecting plate is fixed between the piston plate and the brake plate.

[0007] Preferably, a pair of limiting rods are fixed to the inner side wall of the telescopic slot, and the ends of the limiting rods are slidably connected in the brake plate.

[0008] Preferably, a pair of return springs are fixed between the inner side wall of the telescopic slot and the brake plate, and the return springs are both located on the periphery of the limiting rod.

[0009] Preferably, the inner side of the brake plate is an arc structure, and the curvature of the arc matches the curvature of the outer arc of the rotating plate, and a ceramic sheet is fixed to the inner wall of the brake plate.

[0010] Preferably, a controller is fixed on the outside of the pneumatic motor, and the controller is electrically connected to the air compressor and the electromagnetic three-way valve.

[0011] Compared with the prior art, the utility model has the following beneficial technical effects: a pneumatic braking structure is arranged on the periphery of the drill rod, which can brake the drill bit by changing the direction of the airflow after drilling is completed, thereby avoiding continuous rotation of the drill bit due to inertia, and improving the drilling accuracy and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the side appearance structure of the utility model;

[0013] Figure 2 It is a schematic diagram of the combined cross-sectional structure of the rotating plate and the brake plate of the utility model;

[0014] Figure 3 This is a schematic diagram of the appearance structure of the brake plate of the utility model;

[0015] Figure 4 For this utility model Figure 2 Enlarged structural diagram at A in the middle.

[0016] Figure numerals: 1. air compressor; 2. pneumatic motor; 21. drill rod; 22. drill bit; 23. controller; 24. rotating plate; 3. connecting pipe; 31. electromagnetic three-way valve; 32. brake air pipe; 4. outer plate; 41. telescopic slot; 42. limit rod; 43. return spring; 44. fixed frame; 5. brake plate; 51. ceramic plate; 52. connecting plate; 53. piston plate. DETAILED DESCRIPTION

[0017] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0018] Example

[0019] like Figure 1-4As shown, a pneumatically controlled drilling mechanism proposed by the utility model comprises an air compressor 1, an air motor 2 and a drill rod 21, the air compressor 1 is fixed at the end of the air motor 2, the drill rod 21 is rotatably connected to the output end of the air motor 2, a drill bit 22 is fixed at the end of the drill rod 21, a connecting pipe 3 is fixed between the air compressor 1 and the air inlet of the air motor 2, a rotating plate 24 is fixed to the periphery of one end of the drill rod 21 close to the air motor 2, a pair of peripheral plates 4 are fixed to the periphery of the front end of the air motor 2, a brake plate 5 is arranged on the inner side of the peripheral plate 4, an electromagnetic three-way valve 31 is fixed on the connecting pipe 3, and a brake air pipe 32 is fixed between the electromagnetic three-way valve 31 and the peripheral plate 4, the inner side of the brake plate 5 is an arc structure, and the arc curvature is adapted to the arc curvature of the outer periphery of the rotating plate 24, a ceramic sheet 51 is fixed to the inner wall of the brake plate 5, a controller 23 is fixed to the outer side of the air motor 2, and the controller 23 is electrically connected to the air compressor 1 and the electromagnetic three-way valve 31.

[0020] A telescopic groove 41 is opened on the inner side of the outer plate 4, and the outer side of the brake plate 5 is slidably connected in the telescopic groove 41. A fixed frame 44 is fixed to the inner wall of the telescopic groove 41, and the end of the brake air pipe 32 is fixed on the fixed frame 44. A piston plate 53 is slidably connected in the fixed frame 44, and a connecting plate 52 is fixed between the piston plate 53 and the brake plate 5. A pair of limit rods 42 are fixed to the inner wall of the telescopic groove 41, and the end of the limit rod 42 is slidably connected in the brake plate 5. A pair of return springs 43 are fixed between the inner wall of the telescopic groove 41 and the brake plate 5, and the return springs 43 are all located on the outer periphery of the limit rod 42.

[0021] In this embodiment, the entire device is first connected to an external power source, and the air compressor 1 is used to generate high-pressure gas, and the gas is transported to the pneumatic motor 2 through the connecting pipe 3, which can drive the drill rod 21 and the drill bit 22 to rotate, thereby achieving the purpose of drilling. After the drilling is completed, the brake plate 5 can be extended and retracted to brake the rotating plate 24, so that it stops rotating quickly, and then the drill rod 21 and the drill bit 22 stop rotating immediately, thereby improving the accuracy of the drilling depth and size, and also improving safety. In this process, by controlling the electromagnetic three-way valve 31, after the drilling is completed, the high-pressure gas can be injected from the connecting pipe 3 into the designated air pipe, and finally enter the fixed frame 44, so that the piston plate 53 can be extended and retracted under the action of the air pressure difference, and finally drive the movement of the brake plate 5, so that the brake plate 5 is close to the side and the outer wall of the rotating plate 24 is precisely fitted to achieve the purpose of braking. On the contrary, when the drilling operation is performed, the reset spring 43 can be used to reset the brake plate 5, and then the drilling operation can be carried out normally.

[0022] The above-mentioned specific embodiments are only several preferred embodiments of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

Claims

1. A pneumatically controlled drilling mechanism, comprising an air compressor (1), a pneumatic motor (2) and a drill rod (21), characterized in that: The air compressor (1) is fixed at the end of the pneumatic motor (2), the drill rod (21) is rotatably connected to the output end of the pneumatic motor (2), a drill bit (22) is fixed to the end of the drill rod (21), a connecting pipe (3) is fixed between the air compressor (1) and the air inlet of the pneumatic motor (2), a rotating plate (24) is fixed to the periphery of one end of the drill rod (21) close to the pneumatic motor (2), a pair of peripheral plates (4) are fixed to the periphery of the front end of the pneumatic motor (2), a brake plate (5) is arranged on the inner side of the peripheral plate (4), an electromagnetic three-way valve (31) is fixed on the connecting pipe (3), and a brake air pipe (32) is fixed between the electromagnetic three-way valve (31) and the peripheral plate (4).

2. A pneumatically controlled drilling mechanism according to claim 1, characterized in that: A telescopic groove (41) is provided on the inner side of the outer plate (4), the outer side of the brake plate (5) is slidably connected in the telescopic groove (41), a fixing frame (44) is fixed on the inner side wall of the telescopic groove (41), the end of the brake air pipe (32) is fixed on the fixing frame (44), a piston plate (53) is slidably connected in the fixing frame (44), and a connecting plate (52) is fixed between the piston plate (53) and the brake plate (5).

3. A pneumatically controlled drilling mechanism according to claim 2, characterized in that: A pair of limiting rods (42) are fixed to the inner side walls of the telescopic slot (41), and the ends of the limiting rods (42) are slidably connected in the brake plate (5).

4. A pneumatically controlled drilling mechanism according to claim 3, characterized in that: A pair of return springs (43) are fixed between the inner side wall of the telescopic slot (41) and the brake plate (5), and the return springs (43) are both located on the periphery of the limiting rod (42).

5. The pneumatically controlled drilling mechanism according to claim 1, characterized in that: The inner side of the brake plate (5) is an arc structure, and the arc radius is compatible with the arc radius of the outer periphery of the rotating plate (24). A ceramic sheet (51) is fixed to the inner side wall of the brake plate (5).

6. The pneumatically controlled drilling mechanism according to claim 1, characterized in that: A controller (23) is fixed on the outside of the pneumatic motor (2), and the controller (23) is electrically connected to the air compressor (1) and the electromagnetic three-way valve (31).

Images