Magnetic drill with long service life
By introducing an overload protector into the magnetic drill, which uses an inductive metal plate to disconnect the circuit when overloaded, the problem of motor burnout caused by excessive force applied by the operator is solved, thus extending the service life of the magnetic drill.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-09
- Publication Date
- 2026-03-24
AI Technical Summary
Magnetic drills can easily burn out due to excessive force applied by the operator during operation, causing the motor to overload and affecting its lifespan.
A magnetic drill including an overload protector was designed. Through the cooperation of a sensing metal plate and a blocking plate, the sensing metal plate generates heat deformation when overloaded, disconnecting the motor control circuit and preventing the motor from overloading.
It effectively protects the motor, prevents it from burning out, and extends the service life of the magnetic drill.
Smart Images
Figure CN224026552U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to magnetic force drill technical field especially relates to a long service life's magnetic force drill. BACKGROUND
[0002] Magnetic force drill is a kind of portable drilling tool using electromagnetic principle works. Its working principle is through electromagnet and generates magnetic field after being energized, firmly adsorbs base on the surface of steel material, then high-speed operation of motor drives drill bit, realizes the drilling or thread processing of steel plate.
[0003] Magnetic force drill is mainly artificial operation, and motor power variation interval will change because of the size of the force exerted by operator, when drilling, when operator exerts too hard, it is easy to cause magnetic force drill motor overload, thereby burning motor, leading to magnetic force drill cannot be normally used. UTILITY MODEL CONTENT
[0004] The utility model discloses a long service life's magnetic force drill can effectively protect motor, when the motor of magnetic force drill is overloaded, disconnects circuit in time, prevents motor from being burnt out, prolongs the service life of magnetic force drill.
[0005] The utility model discloses a long service life's magnetic force drill, including base, the upper end of base is provided with working box, the side end of working box is provided with slide rail and the drilling mechanism that can slide up and down along slide rail, be provided with motor controller and overload protector in working box, the overload protector includes the shell, first metal sheet and second metal sheet, the upper end of first metal sheet and the upper end of second metal sheet all are set in the shell, the upper end of first metal sheet and the upper end of second metal sheet all are provided with first contact point, still be provided with inductive metal sheet in the shell, the back of inductive metal sheet is provided with second contact point, second contact point and first contact point abut, be provided with the blocking piece between inductive metal sheet and first metal sheet, second metal sheet, inductive metal sheet is provided with abutment portion, and this abutment portion and the upper end of blocking piece abut, the lower end of abutment portion is provided with spring, one end of spring and blocking piece abut, the other end of spring and the inner wall of shell abut, the lower end of first metal sheet and the lower end of second metal sheet all are set in the shell outside, and are connected with motor controller through electric wire, form motor control loop.
[0006] As preferred, the working box is provided with a panel, and the panel is provided with a control switch electrically connected with the motor controller.
[0007] As preferred, the lower end of the first metal sheet and the lower end of the second metal sheet are both provided with a wire hole for connecting the electric wire.
[0008] As preferred, the drilling mechanism comprises a slide, the upper end of the slide is provided with a motor, the lower end of the slide is provided with a drill bit, the drill bit is drivingly connected with the motor, and the back of the slide is provided with a sliding groove slidingly connected with the slide rail.
[0009] As preferred, the cross section of the slide rail and the cross section of the sliding groove are dovetail groove shapes.
[0010] As preferred, the drill bit comprises a positioning rod and a cutter head, the upper end of the positioning rod is drivingly connected with the motor, and the lower end of the positioning rod is detachably connected with the cutter head.
[0011] As preferred, the upper end of the working box is provided with a handle.
[0012] The beneficial effects of the utility model are as follows: the electric wire is connected with the lower end of the first metal sheet and the lower end of the second metal sheet of the overload protector after passing through the motor controller, at this time, the second contact point of the sensing metal sheet contacts the first contact point of the first metal sheet and the first contact point of the second metal sheet in the shell of the overload protector, a complete motor control circuit is formed, then the magnetic force drill works, when the motor is overloaded, the circuit will be abnormal, the current entering the overload protector through the first metal sheet increases, the current passing through the sensing metal sheet also increases, when the strong current passes through the sensing metal sheet, a large amount of heat is generated on the sensing metal sheet, the sensing metal sheet deforms after being heated, the deformation makes the abutting portion of the sensing metal sheet separate from the blocking sheet, the spring restores the deformation to push the blocking sheet into the sensing metal sheet, the first metal sheet and the second metal sheet, the second contact point of the sensing metal sheet is disconnected from the first contact point of the first metal sheet and the first contact point of the second metal sheet, the whole motor control circuit is disconnected, the magnetic force drill stops working, and the motor is prevented from being burnt out, the utility model can effectively protect the motor, when the motor of the magnetic force drill is overloaded, the circuit is disconnected in time, the motor is prevented from being burnt out, and the service life of the magnetic force drill is prolonged. BRIEF DESCRIPTION OF DRAWINGS
[0013] Figure 1 It is a structural schematic view of the utility model.
[0014] Figure 2 It is a structural schematic view in the working box of the utility model.
[0015] Figure 3 It is a structural schematic view of the overload protector when the utility model is overloaded.
[0016] Figure 4 It is a structural schematic view of the sensing metal sheet of the utility model.
[0017] Figure 5 It is a structural schematic view of the drilling mechanism and the slide rail of the utility model. DETAILED DESCRIPTION
[0018] The utility model is further described below in combination with the drawings Figure 1 to the drawings Figure 5 , and the specific implementation is further described.
[0019] As Figures 1 to 4 shown, a long service life magnetic force drill, including base 1, the upper end of base 1 is provided with work tank 2, the side end of work tank 2 is provided with slide rail 3 and the drilling mechanism 4 that can slide up and down along slide rail 3, be provided with motor controller 5 and overload protector 6 in work tank 2, the overload protector 6 includes shell 61, first metal sheet 62 and second metal sheet 63, the upper end of first metal sheet 62 and the upper end of second metal sheet 63 are all set in shell 61, the upper end of first metal sheet 62 and the upper end of second metal sheet 63 are all provided with first contact point 64, the shell 61 is also provided with inductive metal sheet 65, the back of inductive metal sheet 65 is provided with second contact point 651, and the second contact point 651 is in abutment with first contact point 64, and the inductive metal sheet 65 is provided with the blocking piece 66 between first metal sheet 62,second metal sheet 63, the inductive metal sheet 65 is provided with abutment portion 652, and the abutment portion 652 is in abutment with the upper end of blocking piece 66, and the lower end of abutment portion 652 is provided with spring 67, one end of spring 67 is in abutment with blocking piece 66, and the other end of spring 67 is in abutment with the inner wall of shell 61;The lower end of first metal sheet 62 and the lower end of second metal sheet 63 are all set in shell 61, and are connected with motor controller 5 by wire, form motor control loop.
[0020] In this embodiment, the wire passes through the motor controller 5 and then connects to the lower ends of the first metal plate 62 and the second metal plate 63 of the overload protector 6. At this time, inside the housing 61 of the overload protector 6, the second contact point 651 of the sensing metal plate 65 contacts the first contact point 64 of the first metal plate 62 and the first contact point 64 of the second metal plate 63, forming a complete motor control circuit. Subsequently, the magnetic drill operates. When the motor 42 is overloaded, the circuit will malfunction, and the current entering the overload protector 6 through the first metal plate 62 will increase. The current passing through the sensing metal plate 65 will also increase. The strong current passing through the sensing metal plate 65 will generate a large amount of heat on the sensing metal plate 65. When the sensing metal sheet 65 is heated, it deforms, causing the contact portion 652 of the sensing metal sheet 65 to separate from the blocking piece 66. The spring 67 restores its deformation and pushes the blocking piece 66 between the sensing metal sheet 65 and the first metal sheet 62 and the second metal sheet 63, disconnecting the second contact point 651 of the sensing metal sheet 65 from the first contact point 64 of the first metal sheet 62 and the first contact point 64 of the second metal sheet 63. This disconnects the entire motor control circuit, stops the magnetic drill from working, and prevents the motor 42 from burning out. This invention can effectively protect the motor 42. When the motor 42 of the magnetic drill is overloaded, the circuit is disconnected in time to prevent the motor 42 from burning out and extend the service life of the magnetic drill.
[0021] In this embodiment, the work box 2 is provided with a panel 21, and the panel 21 is provided with a control switch 22. The control switch 22 is electrically connected to the motor controller 5 and is used to control the motor 42 to start and stop.
[0022] In this embodiment, the lower ends of the first metal sheet 62 and the second metal sheet 63 are both provided with wire holes 68 for connecting wires. The wires pass through the wire holes 68 and are wound around the first metal sheet 62 and the second metal sheet 63 to form a complete circuit.
[0023] like Figure 5 As shown, in this embodiment, the drilling mechanism 4 includes a slide 41, a motor 42 is provided at the upper end of the slide 41, and a drill bit 43 is provided at the lower end of the slide 41. The drill bit 43 is driven and connected to the motor 42. The back of the slide 41 is provided with a slide groove that is slidably connected to the slide rail 3. The slide slides up and down along the slide rail 3 to adjust the drilling position and depth.
[0024] In this embodiment, the cross-section of the slide rail 3 and the cross-section of the slide groove are both dovetail grooves. Since the entire magnetic drill will vibrate when the drill bit 43 is drilling, the dovetail groove design effectively prevents the slide block 41 from disengaging from the slide rail 3 due to vibration, thus avoiding safety issues.
[0025] In the embodiment, the drill bit 43 comprises a locating rod 431 and a cutter head 432, the upper end of the locating rod 431 is drivingly connected with the motor 42, the lower end of the locating rod 431 is detachably connected with the cutter head 432, and the locating rod 431 can ensure that the cutter head 432 of the drill bit 43 is 90 degrees with the workpiece surface during drilling, so that the cutter head 432 is prevented from being damaged due to inclination during drilling, and service life is provided.
[0026] In the embodiment, the upper end of the working box 2 is provided with a handle 7, so that the magnetic drill is convenient to move.
[0027] The above is only the preferred embodiment of the present application, and for those skilled in the art, according to the idea of the present application, the specific implementation and application range can be changed, and the content of the specification should not be understood as the limitation of the present application.
Claims
1. A magnetic drill with a long service life, comprising a base, a working box disposed at the upper end of the base, and a slide rail and a drilling mechanism slidable up and down along the slide rail disposed at the side end of the working box, characterized in that: The working box is provided with a motor controller and an overload protector, the overload protector comprises a shell, a first metal sheet and a second metal sheet, the upper end of the first metal sheet and the upper end of the second metal sheet are arranged in the shell, the upper end of the first metal sheet and the upper end of the second metal sheet are provided with a first contact point, the shell is further provided with an induction metal sheet, the back of the induction metal sheet is provided with a second contact point, the second contact point abuts against the first contact point, the induction metal sheet is provided between the first metal sheet and the second metal sheet with a blocking sheet, the induction metal sheet is provided with an abutting portion which abuts against the upper end of the blocking sheet, the lower end of the abutting portion is provided with a spring, one end of the spring abuts against the blocking sheet, and the other end of the spring abuts against the inner wall of the shell; the lower end of the first metal sheet and the lower end of the second metal sheet are arranged outside the shell and connected with the motor controller through an electric wire to form a motor control circuit.
2. The long service life magnetic force drill according to claim 1, characterized in that: The working box is provided with a panel, the panel is provided with a control switch, and the control switch is electrically connected with the motor controller.
3. The long service life magnetic drill according to claim 1, characterized in that: The lower end of the first metal sheet and the lower end of the second metal sheet are provided with wire holes for connecting electric wires.
4. The long service life magnetic drill according to claim 1, characterized in that: The drilling mechanism comprises a sliding seat, the upper end of the sliding seat is provided with a motor, the lower end of the sliding seat is provided with a drill bit, the drill bit is drivingly connected with the motor, and the back of the sliding seat is provided with a sliding groove which is slidingly connected with a sliding rail.
5. The long service life magnetic drill according to claim 4, characterized in that: The cross section of the sliding rail and the cross section of the sliding groove are dovetail groove shapes.
6. The long service life magnetic drill according to claim 4, characterized in that: The drill bit comprises a positioning rod and a cutter head portion, the upper end of the positioning rod is drivingly connected with the motor, and the lower end of the positioning rod is detachably connected with the cutter head portion.
7. The long service life magnetic drill according to claim 1, characterized in that: The upper end of the working box is provided with a handle.