A linkage switch device for a pneumatic magnetic drilling machine

Abstract

This utility model discloses a linkage switch device for a pneumatic magnetic drilling machine, relating to the field of self-locking switches. It includes a valve body, a magnetic base, a shaft, and a magnetic shaft. A horizontally penetrating cylindrical mounting groove is formed within the valve body. The shaft is rotatably connected to the mounting groove via a bearing. A first gear is connected to one end of the shaft. A vertically downward-facing set screw is screwed onto the valve body. The set screw is connected to a ball via a pressure spring, allowing the ball to extend downward into the mounting groove. A circumferentially oriented semi-circular groove and an axially oriented straight groove are formed on the outer wall of the shaft. The straight groove and the semi-circular groove are smoothly connected, and both are slidably connected to the ball. The magnetic shaft is rotatably connected to the magnetic base. A second gear is connected to one end of the magnetic shaft, meshing with the first gear. This device, by placing the semi-circular groove and straight groove on the shaft, reduces the processing and assembly difficulty of the components, effectively lowering production costs.

Description

Technical Field

[0001] This utility model belongs to the field of self-locking switches, specifically relating to a linkage switch device for a pneumatic magnetic drilling machine. Background Technology

[0002] Pneumatic magnetic drilling machines are used for drilling holes in steel plates in underground coal mines. They offer significant advantages in reducing worker workload, improving work efficiency, and simplifying equipment assembly and disassembly. Pneumatic magnetic drilling machines are characterized by their compact size, light weight, and excellent maintainability. However, some current pneumatic magnetic drilling machines use separate switches, which inconvenience in operation and have weak self-locking capabilities. This can easily lead to the magnetic drill falling from the steel surface and causing injury.

[0003] Chinese patent application CN201922408458.1 discloses an interlocking switch device for a pneumatic drilling rig, comprising: a valve body, the valve body being hollow cylindrical in the middle, having a semi-circular groove disposed in the lower half of the hollow cylinder within the valve body; a straight groove disposed to the left front of the semi-circular groove; an interlocking shaft located within the valve body, the interlocking shaft having a semi-circular hole, one on each of the upper and right surfaces of the interlocking shaft, and two on the lower surface of the interlocking shaft; and a first sphere disposed within the semi-circular hole on the right surface of the interlocking shaft, and located within the semi-circular groove. This device can effectively prevent safety hazards caused by misoperation, greatly improving machine safety. However, the above device requires the first sphere on the interlocking shaft to cooperate with the semi-circular groove and straight groove on the inner wall of the valve body to achieve self-locking and limiting, which greatly increases the processing difficulty of the valve body and the assembly difficulty between components, increasing the production cost of the device. Utility Model Content

[0004] To address the problems mentioned in the background, this utility model provides a linkage switch device for a pneumatic magnetic drilling machine, featuring a novel self-locking mechanism that facilitates component processing and assembly, effectively reducing component processing costs.

[0005] To achieve the above objectives, the specific technical solution of this utility model is as follows: A linkage switch device for a pneumatic magnetic drilling machine includes a valve body, a magnetic base, a shaft, and a magnetic shaft. The valve body is fixedly mounted on the magnetic base. A horizontally penetrating cylindrical mounting groove is formed inside the valve body. The shaft is rotatably connected to the mounting groove via a bearing. A first gear is connected to one end of the shaft. A vertically downward-facing set screw is screwed onto the valve body. The set screw is connected to a ball via a pressure spring. The ball can extend downward into the mounting groove. A circumferentially oriented semicircular groove and an axially oriented straight groove are formed on the outer wall of the shaft. The straight groove and the semicircular groove are smoothly connected. Both the straight groove and the semicircular groove are slidably connected to the ball. The magnetic shaft is rotatably connected to the magnetic base. A second gear is connected to one end of the magnetic shaft. The second gear meshes with the first gear.

[0006] As a further feature of the above scheme, a first groove point is formed at the end of the semicircular groove away from the straight groove, a second groove point is formed at the connection between the semicircular groove and the straight groove, and a third groove point is formed at the end of the straight groove away from the semicircular groove. The depths of the first, second, and third groove points are greater than the depths of the semicircular groove and the straight groove.

[0007] As a further feature of the above scheme, the central angle corresponding to the semicircular groove is set to 180°.

[0008] As a further feature of the above scheme, the valve body is provided with an air inlet and an air outlet, which are connected to the interior of the valve body. By controlling the forward and backward movement of the shaft, the connection and closure states between the air inlet and the air outlet can be switched.

[0009] This utility model has the following beneficial effects: The axial movement and rotation of the shaft are limited by the sliding fit between the ball on the set screw on the valve body and the semi-circular groove and straight groove on the shaft. In conjunction with the first gear and the second gear, the rotation of the magnetic shaft is limited, thereby avoiding the safety hazard caused by the magnetic seat falling off the workpiece during operation due to switch rebound or misoperation. The semi-circular groove and straight groove on the shaft greatly reduce the processing and assembly difficulty of the components, thereby effectively reducing production costs. Attached Figure Description

[0010] Figure 1 This is a schematic diagram showing the positions of the shaft, semi-circular groove, and straight groove of this utility model; Figure 2 This is a structural schematic diagram of the shaft, air inlet, and air outlet of this utility model; Figure 3 This is a schematic cross-sectional view of the present invention.

[0011] 1. Valve body; 2. Shaft; 20. First groove; 21. Second groove; 22. Third groove; 23. Semicircular groove; 24. Straight groove; 3. Set screw; 4. Bearing; 5. First gear; 6. Second gear; 7. Magnetic shaft; 8. Magnetic base; 10. Air inlet; 11. Air outlet. Detailed Implementation

[0012] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0013] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The following will refer to the appendix... Figures 1-3 This application will be described in detail with reference to the embodiments.

[0014] A linkage switch device for a pneumatic magnetic drilling machine includes a valve body 1, a magnetic base 8, a shaft 2, and a magnetic shaft 7. The valve body 1 is fixedly mounted on the magnetic base 8. A horizontally penetrating cylindrical mounting groove is opened inside the valve body 1. The shaft 2 is rotatably connected to the mounting groove via a bearing 4. A first gear 5 is connected to one end of the shaft 2. A vertically downward-facing set screw 3 is screwed onto the valve body 1. The set screw 3 is connected to a ball via a pressure spring. The ball can penetrate downward into the mounting groove. A circumferentially oriented semicircular groove 23 is opened on the outer wall of the shaft 2. An axially oriented straight groove 24 is also opened on the outer wall of the shaft 2. The straight groove 24 and the semicircular groove 23 are smoothly connected. Both the straight groove 24 and the semicircular groove 23 are slidably connected to the ball. The magnetic shaft 7 is rotatably connected to the magnetic base 8. A second gear 6 is connected to one end of the magnetic shaft 7. The second gear 6 is meshed with the first gear 5. The magnetic shaft 7 and the shaft 2 achieve synchronous rotation through the meshing connection of the second gear 6 and the first gear 5.

[0015] The semicircular groove 23 has a first groove point 20 at the end away from the straight groove 24, a second groove point 21 at the connection between the semicircular groove 23 and the straight groove 24, and a third groove point 22 at the end of the straight groove 24 away from the semicircular groove 23. The central angle corresponding to the semicircular groove 23 is set to 180°. The ball can move smoothly within the semicircular groove 23 and the straight groove 24. The depths of the first groove point 20, the second groove point 21, and the third groove point 23 are greater than the depths of the semicircular groove 23 and the straight groove 24. The ball is engaged within the first groove point 20, the second groove point 21, and the third groove point 23, which can limit the movement of the shaft 2. However, when the shaft 2 is subjected to sufficient pushing or pulling force or torque, the ball can slide from the first groove point 20, the second groove point 21, and the third groove point 23 into the semicircular groove 23 or the straight groove 24.

[0016] The valve body 1 is provided with an air inlet 10 and an air outlet 11. The air inlet 10 and the air outlet 11 are connected to the inside of the valve body 1. By controlling the forward and backward movement of the shaft 2, the connection and closing states between the air inlet 10 and the air outlet 11 can be switched. The rotation of the shaft 2 does not affect the switching of the connection and closing relationship between the air inlet 10 and the air outlet 11, thereby controlling the start and stop of the drilling machine.

[0017] The working process of this utility model is as follows: When the drilling machine is in the off state, the ball is engaged in the first groove 20, applying an external torque to the shaft 2, rotating the shaft 2 by 180°. The ball slides from the first groove 20 to the second groove 21 through the semi-circular groove 23. The shaft 2 drives the first gear 5 to rotate, the first gear 5 drives the second gear 6 to rotate, and the second gear 6 drives the magnetic shaft 7 to rotate, thus opening the magnetic base 8 and attracting the drilling machine onto the steel part. Pulling the shaft 2 forward causes the ball to slide along the straight groove 24 from the second groove 21 to the third groove 22. At this time, the air passages of the air inlet 10 and the air outlet 11 are open, the pneumatic motor starts, and drilling operation begins.

[0018] Throughout the entire operation, the linkage between shaft 2 and magnetic shaft 7 completely restricts the operator's operating sequence. When the magnetic base 8 is in the closed state, the ball is engaged in the first groove 20, preventing shaft 2 from moving axially and thus preventing the pneumatic motor from starting. When the pneumatic motor is in the open state, the ball is engaged in the third groove 22, preventing shaft 2 from rotating, which in turn prevents magnetic shaft 7 from rotating, and the magnetic base cannot be closed. Therefore, this invention prevents the magnetic base from falling off the workpiece during operation due to switch rebound or misoperation, greatly improving operational safety.

[0019] The semicircular groove 23 and the straight groove 24 are set on the shaft 2, which is simple to process. The set screw 3 is connected to a ball through a pressure spring. The ball can slide down into the mounting groove and move smoothly in the semicircular groove 23 and the straight groove 24, making assembly very convenient.

[0020] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model.

Claims

1. A linkage switching device for a pneumatic magnetic drilling machine, comprising a valve body, a magnetic base, a shaft, and a magnetic shaft, wherein the valve body is fixedly mounted on the magnetic base, characterized in that, The valve body has a horizontally penetrating cylindrical mounting groove. The shaft is rotatably connected to the mounting groove via a bearing. One end of the shaft is connected to a first gear. A vertically downward-facing set screw is screwed onto the valve body. The set screw is connected to a ball via a pressure spring. The ball can extend downward into the mounting groove. A circumferentially oriented semicircular groove and an axially oriented straight groove are also formed on the outer wall of the shaft. The straight groove and the semicircular groove are smoothly connected. Both the straight groove and the semicircular groove are slidably connected to the ball. The magnetic shaft is rotatably connected to a magnetic base. One end of the magnetic shaft is connected to a second gear, which meshes with the first gear.

2. The linkage switch device of the pneumatic magnetic drilling machine according to claim 1, characterized in that, The semicircular groove has a first groove point at the end away from the straight groove, the semicircular groove has a second groove point at the connection between the straight groove and the semicircular groove, and the straight groove has a third groove point at the end away from the semicircular groove. The depths of the first, second, and third groove points are greater than the depths of the semicircular groove and the straight groove.

3. The linkage switch device of the pneumatic magnetic drilling machine according to claim 2, characterized in that, The central angle corresponding to the semicircular groove is set to 180°.

4. The linkage switch device of the pneumatic magnetic drilling machine according to claim 1, characterized in that, The valve body is provided with an air inlet and an air outlet, which are connected to the inside of the valve body. By controlling the forward and backward movement of the shaft, the connection and closing states between the air inlet and the air outlet can be switched.

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