A drill bit extension device for use with a magnetic drill

Abstract

This utility model discloses a drill bit extension device for magnetic drills, characterized by comprising a drive gear shaft, a fixed base, a drive gear, a first bearing housing, a first bearing, a second bearing housing, a second bearing, a drill sleeve, a driven gear, a third bearing housing, and a third bearing. The drive gear shaft is vertically connected to the fixed base, and the drive gear is sleeved on the drive gear shaft. The bottom end of the drive gear shaft is connected to the first bearing housing via the first bearing. The driven gear meshes with the drive gear, and the drill sleeve is vertically connected to the center of the driven gear. This drill bit extension device for magnetic drills extends the lateral distance between the drill bit and the original magnetic drill by adding a set of transmission components, thus extending the longitudinal working distance of the drill bit. Without affecting the firm adhesion of the magnetic base to the working surface, it allows the drill bit to penetrate into corners that are difficult to reach on the workpiece for drilling operations, greatly expanding the working range of the equipment.

Description

Technical Field

[0001] This utility model belongs to the technical field of magnetic drilling equipment, specifically relating to a drill bit extension device used in magnetic drills. Background Technology

[0002] A magnetic drill is a special power tool that combines magnetic attraction with drilling functionality. It is mainly used for efficient and precise drilling operations on metal materials, such as steel and aluminum alloys. Its core feature is that it uses strong magnetic force to attract the workpiece surface, achieving fixed and stable drilling, making it particularly suitable for special working conditions such as high altitudes, vertical or inclined surfaces.

[0003] Due to the inherent size limitations of magnetic drills, the drill bit and servo controller are relatively close together, making it difficult to achieve effective adhesion and stable drilling operations when machining in confined spaces such as corners or edges of workpieces. To address this issue and improve adaptability to on-site machining, an extension device was designed and added to the magnetic drill. Utility Model Content

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A drill bit extension device for a magnetic drill includes a drive gear shaft, a fixed base, a drive gear, a first bearing housing, a first bearing, a second bearing housing, a second bearing, a drill sleeve, a driven gear, a third bearing housing, and a third bearing. The drive gear shaft is vertically connected to the fixed base, and the drive gear is sleeved on the drive gear shaft. The bottom end of the drive gear shaft is connected to the first bearing housing via the first bearing. The driven gear meshes with the drive gear, and the drill sleeve is vertically connected to the center of the driven gear. The upper end of the drill sleeve is connected to the second bearing housing via the second bearing, and the lower end of the drill sleeve is connected to the third bearing housing via the third bearing.

[0006] As a further embodiment of this utility model, it also includes a driving gear key and a driven gear key, wherein the driving gear is connected to the driving gear shaft by the driving gear key, and the driven gear is connected to the drill bushing by the driven gear key.

[0007] As a further embodiment of this utility model, it also includes a first adjusting nut and a second adjusting nut. The first adjusting nut is sleeved on the upper end of the drill sleeve and abuts against the second bearing; the second adjusting nut is sleeved on the lower end of the drill sleeve and abuts against the third bearing.

[0008] As a further embodiment of this utility model, it also includes a first adjusting sleeve and a second adjusting sleeve. The first adjusting sleeve is provided for the axial clearance between the fixed seat and the driving gear, and the first adjusting sleeve is provided for the axial clearance between the driving gear and the first bearing seat. The first adjusting sleeve is sleeved on the driving gear shaft. The second adjusting sleeve is provided for the axial clearance between the driven gear and the third bearing seat. The second adjusting sleeve is sleeved on the drill sleeve.

[0009] As a further embodiment of this utility model: it also includes a first bushing and a second bushing; the radial gap between the upper end of the drill bushing and the second bearing seat is provided with a first bushing, which is sleeved on the drill bushing; the radial gap between the lower end of the drill bushing and the third bearing seat is provided with a second bushing, which is sleeved on the drill bushing.

[0010] As a further embodiment of this utility model: the lower end of the first bearing seat is connected to the bearing cover, and the bearing cover abuts against the first bearing.

[0011] As a further embodiment of this utility model, it includes a drill rig connecting seat; the drill rig connecting seat is disposed on the fixed seat, and the drill rig connecting seat includes a first connecting part and a second connecting part that are perpendicularly connected to each other, the first connecting part is sleeved on the drive gear shaft, and the second connecting part is connected to the slide rail of the magnetic drill through fasteners.

[0012] As a further embodiment of this utility model, the second bearing seat is welded to the fixed seat.

[0013] As a further embodiment of this invention, the second bearing housing is welded to the first bearing housing.

[0014] As a further embodiment of this utility model, it also includes a baffle plate, which is welded to the side of the fixed seat and the side of the first bearing seat.

[0015] The beneficial effects of this utility model are:

[0016] A drill bit extension device for magnetic drills extends the lateral distance between the drill bit and the original magnetic drill by adding a set of transmission components, thus extending the longitudinal working distance of the drill bit. Without affecting the firm attachment of the magnetic base to the work surface, the drill bit can reach into corners that are difficult to access on the workpiece for drilling operations, greatly expanding the equipment's operating range, improving processing flexibility, and better meeting the needs of diverse processing scenarios. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a drill bit extension device used in magnetic drills;

[0018] Figure 2 This is a schematic diagram of the drive gear shaft of a drill bit extension device used in magnetic drills;

[0019] Figure 3 This is a schematic diagram of another drill bit extension device used in magnetic drills;

[0020] Figure 4 This is a front view of a drill rig connection seat used in a magnetic drill bit extension device;

[0021] Figure 5 This is a side view of a drill rig connection seat used in a drill bit extension device for magnetic drills;

[0022] Figure 6 This is a schematic diagram of another drill bit extension device used in magnetic drills, connecting to the magnetic drill.

[0023] Figure 7 This is a schematic diagram showing the connection between the second bearing seat and the fixed seat in a drill bit extension device used in magnetic drills.

[0024] Figure 8 This is a schematic diagram of the structure of a baffle used in a magnetic drill bit extension device.

[0025] The figure shows: 1-drive gear shaft, 2-fixed seat, 3-drive gear key, 4-drive gear, 5-first adjusting sleeve, 6-first bearing seat, 7-bearing cover, 8-first bearing, 9-second bearing seat, 10-first adjusting nut, 11-second bearing, 12-first bushing, 13-drill sleeve, 14-driven gear key, 15-driven gear, 16-second adjusting sleeve, 17-second bushing, 18-third bearing seat, 19-third bearing, 20-second adjusting nut, 21-drill rig connecting seat, 22-baffle, 23-magnetic drill, 24-slide rail, 25-servo motor. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. It should be understood that this application is not limited to the exemplary embodiments disclosed herein. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0027] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] In the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0030] like Figure 1 and 2 As shown, a drill bit extension device for a magnetic drill includes a drive gear shaft 1, a fixed base 2, a drive gear 4, a first bearing 8 seat 6, a first bearing 8, a second bearing 11 seat 9, a second bearing 11, a drill sleeve 13, a driven gear 15, a third bearing 19 seat 18, and a third bearing 19. The drive gear shaft 1 is vertically connected to the fixed base 2, and the drive gear 4 is sleeved on the drive gear shaft 1. The bottom end of the drive gear shaft 1 is connected to the first bearing 8 seat 6 via the first bearing 8. The driven gear 15 is meshed with the drive gear 4, and the drill sleeve 13 is vertically connected to the center of the driven gear 15. The upper end of the drill sleeve 13 is connected to the second bearing 11 seat 9 via the second bearing 11, and the lower end of the drill sleeve 13 is connected to the third bearing 19 seat 18 via the third bearing 19.

[0031] Specifically, the original magnetic drill 23, whose output end was connected to the drill bit, has been modified so that its output end is now connected to the drive gear shaft 1. The drive gear shaft 1 is fitted with a drive gear 4, which meshes with a driven gear 15. The driven gear 15 is fitted with a drill sleeve 13, which is then fitted with the new drill bit. The power output from the magnetic drill 23 is transmitted to the new drill bit through the drive gear shaft 1, drive gear 4, driven gear 15, and drill sleeve 13.

[0032] Therefore, a drill bit extension device for magnetic drills extends the lateral distance between the drill bit and the original magnetic drill 23 by adding a set of transmission components, thus extending the longitudinal working distance of the drill bit. Without affecting the firm adhesion of the magnetic base to the work surface, the drill bit can reach into corners that are difficult to access on the workpiece for drilling operations, greatly expanding the operating range of the equipment, improving processing flexibility, and better meeting the needs of diverse processing scenarios.

[0033] In this embodiment, as Figure 1 As shown, it also includes a driving gear key 3 and a driven gear key 14. The driving gear 4 is connected to the driving gear shaft 1 via the driving gear key 3, and the driven gear 15 is connected to the drill sleeve 13 via the driven gear key 14.

[0034] Specifically, the driving gear key 3 and the driven gear key 14 serve the same function and are referred to as gear keys below. The gear key is embedded in the keyway of the gear's inner hole and the shaft. Through the tight fit between the side of the key and the keyway, relative rotation between the gear and the shaft is prevented, ensuring synchronous rotation. This ensures that the driving gear 4 stably transmits power to the driven gear 15.

[0035] In this embodiment, as Figure 1 As shown, it also includes a first adjusting nut 10 and a second adjusting nut 20. The first adjusting nut 10 is sleeved on the upper end of the drill sleeve 13 and abuts against the second bearing 11; the second adjusting nut 20 is sleeved on the lower end of the drill sleeve 13 and abuts against the third bearing 19.

[0036] Specifically, the first adjusting nut 10, the drill sleeve 13, the second bearing 11, and the second bearing 11 seat 9 are interconnected, and the second adjusting nut 20, the drill sleeve 13, the third bearing 19, and the third bearing 19 seat 18 are interconnected. The first adjusting nut 10 and the second adjusting nut 20 have the same function and are referred to as adjusting nuts below. The second bearing 11 and the third bearing 19 have the same function and are referred to as bearings below. The second bearing 11 seat 9 and the third bearing 19 seat 18 have the same function and are referred to as bearing seats below.

[0037] The bearing housing serves as the mounting base for the bearing, providing rigid support, centering, and external protection, while also transmitting loads to the frame. The bearing is a thrust bearing, bearing radial / axial loads to ensure smooth rotation of the drill sleeve 13. The bearing is nested within the bearing housing; the outer ring mates with the housing, and the inner ring is interference-fitted with the shaft. An adjusting nut abuts against the inner ring; tightening the nut pushes the inner ring axially, pressing the outer ring against the bearing housing step. The housing then transmits the reaction force to the drill sleeve 13, forming a closed-loop preload. The adjusting nut eliminates axial clearance caused by wear or thermal expansion; it also adjusts bearing clearance to prevent slippage of the drill sleeve 13.

[0038] In this embodiment, as Figure 1 As shown, it also includes a first adjusting sleeve 5 and a second adjusting sleeve 16. The axial clearance between the fixed seat 2 and the driving gear 4, and the axial clearance between the driving gear 4 and the first bearing 8 seat 6 are respectively provided with the first adjusting sleeve 5, which is sleeved on the driving gear shaft 1; the axial clearance between the driven gear 15 and the third bearing 19 seat 18 is provided with the second adjusting sleeve 16, which is sleeved on the drill sleeve 13.

[0039] In this embodiment, as Figure 1 As shown, it also includes a first bushing 12 and a second bushing 17; the first bushing 12 is provided in the radial gap between the upper end of the drill bushing 13 and the second bearing 11 seat 9, and the first bushing 12 is sleeved on the drill bushing 13; the second bushing 17 is provided in the radial gap between the lower end of the drill bushing 13 and the third bearing 19 seat 18, and the second bushing 17 is sleeved on the drill bushing 13.

[0040] Specifically, the first adjusting sleeve 5 and the second adjusting sleeve 16 have the same function and are referred to as adjusting sleeves below; the first bushing 12 and the second bushing 17 have the same function and are referred to as bushings below. A bushing is provided between the drill bushing 13 and the bearing housing to protect the drill bushing 13 and reduce wear. By replacing bushings of different thicknesses, the clearance between the shaft and the hole can be finely adjusted to compensate for manufacturing errors or differences in thermal expansion. An adjusting sleeve is provided at the exposed circumference of the drive gear shaft 1 or the drill bushing 13. The adjusting sleeve restricts the axial movement of the drive gear 4, the driven gear 15, the first bearing 8, or the third bearing 19 through the end face or stepped structure of the drive gear shaft 1 or the drill bushing 13, ensuring that the parts work in the correct position. The adjusting sleeve provides additional radial support, reduces shaft bending deformation, and improves transmission smoothness. In addition, both the bushing and the adjusting sleeve have a sealing and dustproof function.

[0041] In this embodiment, a bearing cover 7 is attached to the lower end of the first bearing 8 seat 6, and the bearing cover 7 abuts against the first bearing 8.

[0042] Specifically, the first bearing 8 is a rolling bearing, and the bearing cap 7 fixes the position of the first bearing 8, prevents lubrication leakage, blocks the intrusion of external impurities, and helps to bear axial load.

[0043] In this embodiment, as Figure 3-6 As shown, it includes a drill rig connecting seat 21; the drill rig connecting seat 21 is disposed on the fixed seat 2, and the drill rig connecting seat 21 includes a first connecting part and a second connecting part that are perpendicularly connected to each other. The first connecting part is sleeved on the drive gear shaft 1, and the second connecting part is connected to the slide rail 24 of the magnetic drill 23 by fasteners.

[0044] Specifically, the drill rig connector 21 connects the extension device to the magnetic drill 23 body. The magnetic drill 23 body has a slide rail 24 on its side, and a servo motor 25 drives the drill bit to move on the slide rail 24, allowing adjustment of the original drill bit height. Now, the drill rig connector 21 connects the slide rail 24 to the extension device. In use, the servo motor 25 moves on the slide rail 24, driving the drill rig connector 21 to move on the slide rail 24, thus moving the entire extension device accordingly.

[0045] In this embodiment, the second bearing 11 seat 9 is welded to the fixed seat 2.

[0046] Specifically, the second bearing 11 seat 9 and the fixed seat 2, as a fixing structure, are located in the upper part of the extension device and can be integrally formed, such as... Figure 7 As shown, the second bearing 11 and the drive gear shaft 1 are simultaneously connected.

[0047] In this embodiment, the second bearing 11 seat 9 is welded to the first bearing 8 seat 6.

[0048] Specifically, the second bearing 11 seat 9 and the first bearing 8 seat 6 are fixed structures located on the left half of the extension device and can be integrally formed, simultaneously fitting the first bearing 8 and the second bearing 11.

[0049] In this embodiment, as Figure 8 As shown, it also includes a baffle 22, which is welded to the side of the fixed seat 2 and the side of the first bearing 8 seat 6.

[0050] Specifically, baffle 22 is used to improve the safety of the extension device and prevent it from hitting the rotating gear during operation. It can be installed on one side, two opposite sides, or all four sides of the fixed seat 2 and the first bearing 8 seat 6. After the second bearing 11 seat 9, fixed seat 2, second bearing 11 seat 9, first bearing 8 seat 6 and baffle 22 are welded together, they can be fixed as a whole. The bearings are installed in their respective bearing seats, and the gear keys are connected to their respective gears. The axis of the first bearing 8 is aligned with the axis of the driving gear key 3, and the driving gear shaft 1 is inserted. The axes of the second bearing 11, driven gear key 14 and third bearing 19 are aligned, and the drill sleeve 13 is inserted. The angle or tightness of the bushing and adjusting sleeve, as well as other fasteners, are adjusted to assemble the extension device.

[0051] It should also be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0052] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A drill bit extension device for use in magnetic drills, characterized in that, The assembly includes a drive gear shaft, a fixed base, a drive gear, a first bearing housing, a first bearing, a second bearing housing, a second bearing, a drill bushing, a driven gear, a third bearing housing, and a third bearing. The drive gear shaft is vertically connected to the fixed base, and the drive gear is sleeved on the drive gear shaft. The bottom end of the drive gear shaft is connected to the first bearing housing via the first bearing. The driven gear meshes with the drive gear, and the drill bushing is vertically connected to the center of the driven gear. The upper end of the drill bushing is connected to the second bearing housing via the second bearing, and the lower end of the drill bushing is connected to the third bearing housing via the third bearing.

2. The drill bit extension device for a magnetic drill according to claim 1, characterized in that, It also includes a driving gear key and a driven gear key, wherein the driving gear is connected to the driving gear shaft by the driving gear key, and the driven gear is connected to the drill bushing by the driven gear key.

3. The drill bit extension device for a magnetic drill according to claim 1, characterized in that, It also includes a first adjusting nut and a second adjusting nut. The first adjusting nut is sleeved on the upper end of the drill sleeve and abuts against the second bearing; the second adjusting nut is sleeved on the lower end of the drill sleeve and abuts against the third bearing.

4. The drill bit extension device for a magnetic drill according to claim 1, characterized in that, It also includes a first adjusting sleeve and a second adjusting sleeve. The first adjusting sleeve is provided for the axial clearance between the fixed seat and the driving gear, and the first adjusting sleeve is provided for the axial clearance between the driving gear and the first bearing seat. The first adjusting sleeve is sleeved on the driving gear shaft. The second adjusting sleeve is provided for the axial clearance between the driven gear and the third bearing seat. The second adjusting sleeve is sleeved on the drill sleeve.

5. The drill bit extension device for a magnetic drill according to claim 1, characterized in that, It also includes a first bushing and a second bushing; the radial gap between the upper end of the drill bushing and the second bearing seat is provided with a first bushing, which is sleeved on the drill bushing; the radial gap between the lower end of the drill bushing and the third bearing seat is provided with a second bushing, which is sleeved on the drill bushing.

6. The drill bit extension device for a magnetic drill according to claim 1, characterized in that, Bearing cap; the bearing cap is connected to the lower end of the first bearing housing, and the bearing cap abuts against the first bearing.

7. The drill bit extension device for a magnetic drill according to any one of claims 1-6, characterized in that, The system includes a drill rig connector; the drill rig connector is disposed on the fixed base, and the drill rig connector includes a first connecting part and a second connecting part that are perpendicularly connected to each other. The first connecting part is sleeved on the drive gear shaft, and the second connecting part is connected to the slide rail of the magnetic drill through fasteners.

8. The drill bit extension device for a magnetic drill according to claim 1, characterized in that, The second bearing housing is welded to the fixed base.

9. The drill bit extension device for a magnetic drill according to claim 8, characterized in that, The second bearing housing is welded to the first bearing housing.

10. The drill bit extension device for a magnetic drill according to claim 9, characterized in that, It also includes a baffle plate, which is welded to the side of the fixed seat and the side of the first bearing seat.

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