Anti-falling magnet drill in power-off state

Abstract

The utility model relates to the field of drilling machines, in particular to an anti-falling magnet drill in a power-off state, which is provided with a permanent magnetic chuck and a holding cylinder linked with a rotating core of the permanent magnetic chuck, controls magnetic opening and closing of the permanent magnetic chuck in a mechanical sliding manner, and replaces a conventional magnet drill adopting an electromagnet to control magnetic opening and closing. The magnetic attraction fixation of the magnet drill and the steel structural member is not influenced even under the power failure condition, the risk of falling of the magnet drill after power failure is reduced, and the operation safety of the magnet drill is improved; and meanwhile, by arranging a guide cylinder which is fixed to the magnetic base and is in sliding connection with the holding cylinder, a single operator can hold the magnet drill with two hands, meanwhile, the holding cylinder can be controlled to move, attraction and separation of the magnet drill are achieved, the magnet drill is convenient to lift and transfer, continuous drilling operation is convenient, and better practicability is achieved.

Description

Technical Field

[0001] This utility model relates to a magnetic drill, and more particularly to a magnetic drill that prevents falling when the power is off, applicable to the field of drilling rigs. Background Technology

[0002] A magnetic drill (also known as a magnetic base drill or magnetic power drill) mainly consists of a magnetic base, a motor, a drive shaft, and a drill bit. Its magnetic principle lies in the fact that when the electromagnet in the drill base is energized, it generates a strong magnetic field through a changing current. This magnetic field allows the drill to firmly adhere to the steel workpiece, ensuring stability during drilling operations.

[0003] A patent with publication number CN102873371A discloses a lightweight magnetic drill. This lightweight magnetic drill includes an electromagnet and a motor. A normally open magnetic control switch is located near the magnetic poles of the electromagnet. The magnetic control switch is connected in parallel with a light-emitting diode (LED) and then connected to a power supply. In this lightweight magnetic drill, the magnetic control switch is normally open. When the electromagnet is energized and generates a magnetic field, the switch closes, short-circuiting the indicator light and extinguishing it. If the electromagnet loses power or its magnetic field weakens significantly due to other malfunctions, the magnetic control switch opens, the indicator light is powered on, and it illuminates, indicating that the magnetic field has lost its magnetism or is insufficient, alerting the operator. This effectively ensures the stable operation of the lightweight magnetic drill and protects both the processed product and the drill.

[0004] Although the aforementioned patent uses indicator lights to alert personnel to changes in magnetism, relying on visual observation, if personnel fail to observe in time and the magnet falls due to power failure, it can easily damage the equipment itself and the workpiece being processed. Utility Model Content

[0005] The technical problem to be solved by this invention in view of the above-mentioned prior art is that magnetic drills that are attracted by electromagnets are prone to falling when the power is off.

[0006] To solve the above problems, this utility model provides a magnetic drill that prevents falling in the event of power failure, including a magnetic base and a drill rig slidably connected to the magnetic base. A pair of permanent magnet chucks are fixedly connected to the front end of the magnetic base. Each permanent magnet chuck includes a rotating core, a rotating shaft is fixedly connected to the upper end of the rotating core, and a gear is fixedly connected to the upper end of the rotating shaft. A pair of gears at the upper end of the pair of permanent magnet chucks mesh with the same toothed plate. The toothed plate penetrates the magnetic base and extends to the inner side of the magnetic base. A connecting plate is fixedly connected to the end of the toothed plate, and a gripping cylinder is fixedly connected to the connecting plate. A guide cylinder is slidably connected to the gripping cylinder, and the guide cylinder is fixedly connected to the inner wall of the magnetic base.

[0007] In the aforementioned magnetic drill designed to prevent falling under power loss conditions, a permanent magnet disc and a gripping cylinder linked to it facilitate operation while achieving stable adsorption and fixation of the magnetic drill under power loss conditions.

[0008] As a further improvement of this application, a sliding rod is provided inside the guide cylinder and slidably connected thereto. The drilling rig includes a grip handle, and the end of the sliding rod away from the guide cylinder is fixedly connected to the grip handle.

[0009] As a further improvement of this application, a locking mechanism is also included. The locking mechanism includes an elastic pin that is slidably connected to the gripping cylinder. An insertion hole for inserting the elastic pin is provided on the outer wall of the end of the guide cylinder near the magnetic base. A retaining cylinder is nested inside the guide cylinder, which slides against its inner wall and cooperates with the elastic pin. When the elastic pin is inserted into the guide cylinder through the insertion hole, it engages with the retaining cylinder. A second spring disposed inside the guide cylinder is abutted at the end of the retaining cylinder away from the magnetic base. The end of the sliding rod extends into the retaining cylinder and is slidably connected to the retaining cylinder, and its end is fixedly connected to an end plate that abuts against the inner wall of the retaining cylinder.

[0010] As a further improvement of this application, the permanent magnet chuck includes a housing fixedly connected to the front side of the magnetic base, a magnetic conductor fixedly connected inside the housing, a plurality of fixed magnetic blocks evenly distributed on the outer wall of the magnetic conductor away from the opening, a rotating core nested inside the magnetic conductor and rotatably connected to its inner wall, and a plurality of rotating magnetic blocks cooperating with the fixed magnetic blocks fixedly connected inside the rotating core.

[0011] As a further improvement of this application, a cavity is provided on the front side of the magnetic base to accommodate a pair of permanent magnet chucks. There is a gap between the pair of permanent magnet chucks. The rotating shaft passes through the housing and extends into the cavity. The gear is set in the cavity. The toothed plate passes through the magnetic base housing wall and extends into the cavity. The toothed plate is a horizontal plate with teeth at the front and rear ends.

[0012] As a further improvement of this application, the drilling rig is slidably connected to the magnetic base via a sliding assembly. The sliding assembly includes a sliding block that is fixedly connected to the front end of the drilling rig, and the sliding block is slidably connected to a guide rail that is fixedly connected to the magnetic base.

[0013] As a further improvement of this application, the elastic locking pin includes a pin rod and a first spring sleeved on the pin rod and abutting against the outer wall of the gripping cylinder. A slot is provided on the outer wall of the inner end of the pin rod, and a locking opening that cooperates with the slot is provided at the end of the gripping cylinder facing the magnetic base.

[0014] As a further improvement of this application, the bayonet is an open, arc-shaped opening at the end of the barrel, the slot is an arc-shaped groove, and the sliding rod is a prismatic rod with a regular polygonal cross-section.

[0015] In summary, this utility model, by incorporating a permanent magnet chuck and a gripping cylinder linked to the rotating core of the permanent magnet chuck, controls the magnetic opening and closing of the permanent magnet chuck through mechanical sliding, replacing the traditional electromagnet-controlled magnetic opening and closing method used in magnetic drills. This ensures that even under power failure conditions, the magnetic attraction and fixation between the magnetic drill and steel structural components is not affected, reducing the risk of the magnetic drill falling after power failure and improving the safety of magnetic drill operation. Simultaneously, the guide cylinder, fixed to the magnetic base and slidably connected to the gripping cylinder, allows a single operator to hold the magnetic drill with both hands while simultaneously controlling the movement of the gripping cylinder, facilitating lifting and transferring the magnetic drill, and enabling continuous drilling operations, thus offering greater practicality. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram from the left side view of this application;

[0017] Figure 2 This is a schematic diagram of the internal structure of the magnetic base in this application;

[0018] Figure 3 This is a three-dimensional structural diagram of the permanent magnet chuck in this application;

[0019] Figure 4 This is a three-dimensional structural diagram from the right side view of this application;

[0020] Figure 5 This is a schematic diagram of the transverse cross-sectional structure of this application;

[0021] Figure 6 for Figure 5 Enlarged structural diagram at point A;

[0022] Figure 7 This is a schematic diagram of the grip tube and assembly in this application;

[0023] Figure 8 This is a three-dimensional structural diagram of the flexible locking pin in this application;

[0024] Figure 9 This is a schematic diagram showing the state of the grip cylinder when locked in this application;

[0025] Figure 10 This is a schematic diagram of the state when the grip tube is unlocked in this application.

[0026] Explanation of the labels in the diagram:

[0027] 1. Magnetic base; 2. Drilling rig; 201. Handle; 3. Permanent magnet chuck; 301. Housing; 302. Magnetic conductor; 303. Fixed magnetic block; 304. Rotating core; 305. Rotating magnetic block; 4. Rotating shaft; 5. Gear; 6. Tooth plate; 7. Connecting plate; 8. Handle sleeve; 9. Guide sleeve; 901. Insertion hole; 10. Sliding rod; 1001. End plate; 11. Sliding block; 12. Guide rail; 13. Elastic locking pin; 1301. Pin; 1302. First spring; 1303. Slot; 14. Cylinder; 1401. Bayonet; 15. Second spring. Detailed Implementation

[0028] The two embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0029] Implementation method 1:

[0030] Figure 1-6 A magnetic drill designed to prevent falling in the event of power failure is shown. It includes a magnetic base 1 and a drill 2 slidably connected to the magnetic base 1. A pair of permanent magnet chucks 3 are fixedly connected to the front end of the magnetic base 1. Each permanent magnet chuck 3 includes a rotating core 304. A rotating shaft 4 is fixedly connected to the upper end of the rotating core 304. A gear 5 is fixedly connected to the upper end of the rotating shaft 4. The pair of gears 5 on the upper end of the pair of permanent magnet chucks 3 mesh with the same toothed plate 6. The toothed plate 6 passes through the magnetic base 1 and extends to the inner side of the magnetic base 1. A connecting plate 7 is fixedly connected to the end of the toothed plate 6. A gripping cylinder 8 is fixedly connected to the connecting plate 7. A guide cylinder 9 is slidably connected to the gripping cylinder 8. The guide cylinder 9 is fixedly connected to the inner wall of the magnetic base 1.

[0031] Specifically, the usage includes the following steps:

[0032] Step 1: The operator holds the handle 201 of the drill rig 2 with one hand and the grip cylinder 8 with the other hand, and abuts the permanent magnet chuck 3 against the steel structure to be drilled.

[0033] Step 2: When it is necessary to magnetically fix the magnetic drill to the steel structure, the hand holding the holding cylinder 8 pushes the holding cylinder 8 to move along the guide cylinder 9. The holding cylinder 8 drives the toothed plate 6 to move through the connecting plate 7. The toothed plate 6 drives the rotating core 304 of the permanent magnet chuck 3 to rotate through the gear 5 and the rotating shaft 4, so that the permanent magnet chuck 3 exhibits magnetism, thereby realizing the magnetic fixation of the permanent magnet chuck 3 to the steel structure, and then the drilling operation is carried out.

[0034] Step 3: When it is necessary to disassemble the magnetic drill, slide the gripping cylinder 8 in the opposite direction. The gripping cylinder 8 drives the toothed plate 6 to move in the opposite direction through the connecting plate 7. The toothed plate 6 drives the rotating core 304 of the permanent magnet chuck 3 to rotate through the gear 5 and the rotating shaft 4, thereby causing the magnetism of the permanent magnet chuck 3 to disappear.

[0035] Compared to traditional magnetic drills, this invention features a permanent magnet chuck 3 and a gripping cylinder 8 linked to the rotating core 304 of the permanent magnet chuck 3. The magnetic opening and closing of the permanent magnet chuck 3 is controlled by mechanical sliding, replacing the traditional method of using an electromagnet to control the magnetic opening and closing. This ensures that even under power failure, the magnetic fixation between the drill and the steel structure remains unaffected, reducing the risk of the drill falling after power loss and improving the safety of drill operation. Furthermore, the guide cylinder 9, fixed to the magnetic base 1 and slidably connected to the gripping cylinder 8, allows a single operator to hold the drill with both hands while simultaneously controlling the movement of the gripping cylinder 8. This facilitates lifting and transferring the drill, enabling continuous drilling operations and providing greater practicality.

[0036] Please see Figure 3 The permanent magnet chuck 3 includes a housing 301 fixedly connected to the front side of the magnetic base 1. A magnetic conductor 302 is fixedly connected inside the housing 301. Multiple fixed magnetic blocks 303 are fixedly connected to the outer wall of the magnetic conductor 302 away from the opening. A rotating core 304 is nested inside the magnetic conductor 302 and rotatably connected to its inner wall. Multiple rotating magnetic blocks 305 that cooperate with the fixed magnetic blocks 303 are fixedly connected inside the rotating core 304.

[0037] Specifically, when the magnetic field lines of the rotating magnetic block 305 and the fixed magnetic block 303 in the rotating core 304 are superimposed in the same direction, the permanent magnet chuck 3 exhibits magnetism. When the magnetic field lines of the rotating magnetic block 305 and the fixed magnetic block 303 in the rotating core 304 cancel each other out in opposite directions, the permanent magnet chuck 3 does not exhibit magnetism or exhibits weak magnetism. The magnetic opening and closing principle of the permanent magnet chuck 3 has been applied in permanent magnet lifters and is existing technology, so it will not be described in detail in this application.

[0038] Please see Figure 2 The front side of the magnetic base 1 has a cavity for accommodating a pair of permanent magnet chucks 3. There is a gap between the pair of permanent magnet chucks 3. The rotating shaft 4 passes through the housing 301 and extends into the cavity. The gear 5 is set in the cavity. The toothed plate 6 passes through the housing wall of the magnetic base 1 and extends into the cavity. The toothed plate 6 is a horizontal plate with teeth at the front and rear ends.

[0039] Specifically, by separately fixing a pair of permanent magnet chucks 3, the interference between their magnetic fields is reduced.

[0040] Please see Figure 1 The drilling rig 2 is slidably connected to the magnetic base 1 via a sliding assembly. The sliding assembly includes a sliding block 11 fixedly connected to the front end of the drilling rig 2, and the sliding block 11 is slidably connected to a guide rail 12 fixedly connected to the magnetic base 1.

[0041] Specifically, when the operator holds the gripping cylinder 8 with one hand and makes the gripping cylinder 8 abut against the inner wall of the magnetic base 1, the operator can push the drill rig 2 to move with the other hand, thereby facilitating control of the drilling depth of the drill rig 2.

[0042] Please see Figure 6 The guide cylinder 9 is provided with a sliding rod 10 that is slidably connected thereto. The drilling rig 2 includes a handle 201, and the end of the sliding rod 10 away from the guide cylinder 9 is fixedly connected to the handle 201.

[0043] Specifically, by providing a sliding component and a sliding rod 10, the drill rig 2 and the magnetic base 1 have better connection stability, and the movement path of the drill rig 2 is more linear when drilling, thus improving the drilling quality.

[0044] The second implementation method:

[0045] Figure 7-10 This invention discloses a magnetic drill designed to prevent falling in the event of power failure. Based on the first embodiment, it further includes a locking mechanism. The locking mechanism includes an elastic pin 13 that is slidably connected to a gripping cylinder 8. An insertion hole 901 is provided on the outer wall of the end of the guide cylinder 9 near the magnetic base 1 for inserting the elastic pin 13. A retaining sleeve 14 is nested inside the guide cylinder 9, which slides against its inner wall and engages with the elastic pin 13. When the elastic pin 13 is inserted into the guide cylinder 9 through the insertion hole 901, it engages with the retaining sleeve 14. The end of the retaining sleeve 14 away from the magnetic base 1 abuts against a second spring 15 disposed inside the guide cylinder 9. The end of the sliding rod 10 extends into the retaining sleeve 14 and is slidably connected to the retaining sleeve 14, and its end is fixedly connected to an end plate 1001 that abuts against the inner wall of the retaining sleeve 14.

[0046] For details, please refer to Figure 9 When it is necessary to lock the gripping cylinder 8, push the gripping cylinder 8 close to the magnetic base 1 and abut against the magnetic base 1, then press the elastic locking pin 13. The elastic locking pin 13 is inserted into the guide cylinder 9 through the insertion hole 901, push the locking cylinder 14 to move laterally and engage with the locking cylinder 14. The second spring 15 that abuts against the locking cylinder 14 is compressed, so that the elastic locking pin 13 is engaged and fixed, thereby realizing the locking of the elastic locking pin 13 and the gripping cylinder 8.

[0047] Please see Figure 10 When it is necessary to unlock the elastic latch 13 and the grip tube 8, the grip handle 201 is pulled away from the magnetic base 1. The end plate 1001 at the end of the sliding rod 10 pushes the latch tube 14 away from the elastic latch 13 and disengages from the elastic latch 13. The elastic latch 13 pops out of the guide tube 9 under the action of its own spring, thereby unlocking the grip tube 8 and the elastic latch 13.

[0048] Compared to traditional magnetic drills, this invention utilizes an elastic locking pin 13 on the gripping cylinder 8 and a locking cylinder 14 within the guide cylinder 9. This allows a single operator to easily lock the gripping cylinder 8 by pressing the elastic locking pin 13, thereby locking the permanent magnet chuck 3, improving magnetic stability and facilitating operation. Simultaneously, a sliding rod 10 with an end plate 1001 within the locking cylinder 14 allows a single operator to unlock the gripping cylinder 8 and elastic locking pin 13 by pulling the grip handle 201. This allows the chuck 14 to disengage from the elastic locking pin 13, thereby unlocking the gripping cylinder 8 and the elastic locking pin 13, achieving efficient locking and disengagement of the permanent magnet chuck. Furthermore, the chuck 14 and the elastic locking pin 13 are unlocked by the sliding rod 10 connected to the gripping handle 201, requiring the drill rig 2 to be pulled to the right side of the magnetic base 1 when unlocking the elastic locking pin 13. This ensures that the drill bit of the drill rig 2 is completely disengaged from the borehole, preventing the drill bit from remaining in the borehole and causing bending damage during the transfer of the magnetic drill. The "foolproof design" protects the drill bit.

[0049] Please see Figure 8 The elastic locking pin 13 includes a pin 1301 and a first spring 1302 sleeved on the pin 1301 and abutting against the outer wall of the gripping cylinder 8. A slot 1303 is provided on the outer wall of the inner end of the pin 1301, and a slot 1401 that cooperates with the slot 1303 is provided at the end of the gripping cylinder 14 facing the magnetic base 1.

[0050] Specifically, when the elastic locking pin 13 engages with the locking cylinder 14, the locking slot 1401 is inserted into the locking groove 1303 to achieve stable locking of the elastic locking pin 13.

[0051] Please see Figure 7 The bayonet 1401 is an arc-shaped opening at the end of the barrel 14, the slot 1303 is an arc-shaped groove, and the sliding rod 10 is a prismatic rod with a regular polygonal cross-section.

[0052] Specifically, the prismatic rod with a regular polygonal cross-section improves the stability of the sliding rod 10 when it slides, and prevents the clamp 14 from rotating, so that the clamp 1401 always faces upward.

[0053] In light of current practical needs, the above-described embodiments adopted in this application are not limited to these. Any changes made within the scope of knowledge possessed by those skilled in the art without departing from the concept of this application still fall within the protection scope of this utility model.

Claims

1. A magnetic drill bit for fall protection in a power-off state, characterized by, The utility model relates to a drilling machine, including magnetic seat (1) and with magnetic seat (1) sliding connection drilling machine (2), a pair of permanent magnet suction disc (3) are fixedly connected to the front end of magnetic seat (1), and the permanent magnet suction disc (3) includes rotating core (304), and the upper end of rotating core (304) is fixedly connected with rotating shaft (4), and the upper end of rotating shaft (4) is fixedly connected with gear (5), and a pair of gear (5) of the upper end of a pair of permanent magnet suction disc (3) is engaged with same toothed plate (6), and toothed plate (6) penetrates magnetic seat (1) and extends to the inside of magnetic seat (1), and the tail end of toothed plate (6) is fixedly connected with connecting plate (7), and connecting plate (7) is fixedly connected with holding cylinder (8), and holding cylinder (8) is slidingly connected with guide cylinder (9), and guide cylinder (9) is fixedly connected with the inner side wall of magnetic seat (1).

2. The magnetic drill bit according to claim 1, wherein, The guide cylinder (9) is provided with a sliding rod (10) slidingly connected therewith, and the drilling machine (2) comprises a holding handle (201), and one end of the sliding rod (10) away from the guide cylinder (9) is fixedly connected with the holding handle (201).

3. The magnetic drill bit according to claim 2, wherein, Further comprising a locking mechanism, the locking mechanism comprises a resilient latch (13) slidingly connected with the holding cylinder (8), an end portion of the guide cylinder (9) near the magnetic seat (1) is provided with a hole (901) for inserting the resilient latch (13), and the guide cylinder (9) is nested with a cartridge (14) slidingly abutting with the inner wall thereof and cooperating with the resilient latch (13), when the resilient latch (13) is inserted into the guide cylinder (9) through the hole (901) and is clamped with the cartridge (14), one end of the cartridge (14) away from the magnetic seat (1) abuts against a second spring (15) arranged in the guide cylinder (9); the end portion of the sliding rod (10) extends into the cartridge (14) and is slidingly connected with the cartridge (14), and the end portion thereof is fixedly connected with an end disc (1001) abutting against the inner wall of the cartridge (14).

4. The magnetic drill bit of claim 1, wherein the magnetic drill bit is configured to be attracted to a ferrous object when the magnetic drill bit is in a powered state and the ferrous object is in a powered state. The permanent magnet suction disc (3) comprises a housing (301) fixedly connected to the front side of the magnetic seat (1), a magnetic conductor (302) fixedly connected in the housing (301), a plurality of equidistantly distributed fixed magnetic blocks (303) fixedly connected to the outer wall of the magnetic conductor (302) away from the opening, and a rotating core (304) nested in the magnetic conductor (302) and rotatably connected with the inner wall thereof, a plurality of rotating magnetic blocks (305) fixedly connected in the rotating core (304) and cooperating with the fixed magnetic blocks (303).

5. The magnetic drill bit of claim 1, wherein the magnetic drill bit is configured to be attracted to a ferrous object when the magnetic drill bit is in a powered state and the ferrous object is in a powered state. The front side of the magnetic seat (1) is provided with a recess for accommodating the pair of permanent magnet suction discs (3), and there is a gap between the pair of permanent magnet suction discs (3), the rotating shaft (4) penetrates the housing (301) and extends into the recess, the gear (5) is arranged in the recess, the toothed plate (6) penetrates the shell wall of the magnetic seat (1) and extends into the recess, and the toothed plate (6) is a horizontal plate provided with clamping teeth at the front and rear ends.

6. The magnetic drill bit of claim 1, wherein, The drilling machine (2) is slidingly connected with the magnetic seat (1) through a sliding assembly, and the sliding assembly comprises a sliding block (11) fixedly connected with the front end of the drilling machine (2), and the sliding block (11) is slidingly connected with a guide rail (12) fixedly connected with the magnetic seat (1).

7. The magnetic drill bit of claim 3, wherein the magnetic drill bit is configured to be attracted to a magnetic surface of a drill stand when the drill stand is powered on. The elastic latch (13) comprises a pin rod (1301) and a first spring (1302) sleeved on the pin rod (1301) and abutting against the outer wall of the holding cylinder (8), and a clamping groove (1303) is formed in the outer wall of the inner end of the pin rod (1301), and the clamping cylinder (14) is provided with a clamping opening (1401) matched with the clamping groove (1303) at one end thereof facing the magnetic base (1).

8. The magnetic drill bit of claim 7, wherein the magnetic drill bit is configured to be attracted to a ferrous surface when the magnetic drill bit is in the powered state and the ferrous surface is in the powered state. The clamping opening (1401) is an arc-shaped opening formed in the end of the clamping cylinder (14), the clamping groove (1303) is an arc-shaped groove, and the sliding rod (10) is a prismatic rod with a regular polygonal cross section.

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