CN216421121U

CN216421121U - Drilling machine

Info

Publication number: CN216421121U
Application number: CN202122563334.8U
Authority: CN
Inventors: 彭红祥
Original assignee: Guangdong Haoyuan Technology Co ltd
Current assignee: Guangdong Haoyuan Technology Co ltd
Priority date: 2021-10-22
Filing date: 2021-10-22
Publication date: 2022-05-03
Anticipated expiration: 2031-10-22

Abstract

The utility model discloses a drilling machine, include: the lifting device is arranged on the frame, and the bottom end of the lifting device is a lifting end and is connected with the mounting plate; the drilling mechanism comprises a rotating motor and a drill bit, the rotating motor is arranged on the mounting plate, the drill bit is connected with an output shaft of the rotating motor, and at least part of the drill bit is positioned on the lower side of the bottom surface of the mounting plate; the protective assembly is arranged at the lower end of the mounting plate, at least partially surrounds the periphery of the drill bit and is used for blocking scraps generated in drilling; and the workbench is positioned on the lower side of the protection component and used for placing workpieces. The utility model discloses a drilling machine is through setting up protective assembly to make its at least part enclose and locate drill bit week side, so as to stop the sweeps when the drill bit drills, thereby can avoid the sweeps to injure operating personnel, the security performance is high.

Description

Drilling machine

Technical Field

The utility model relates to a machining technical field especially relates to a drilling machine.

Background

A drill is a general term for machines and apparatuses that leave a cylindrical hole or hole in an object by means of rotary cutting or rotary pressing using a tool harder and sharper than the object. In the production process of many products in daily life, drilling machines are inevitably required, and the drilling machines in the prior art still have problems in use, such as that when a workpiece is drilled, a lot of scraps are generated, and if carelessness is caused, the scraps can easily injure operators.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a drilling machine can block the sweeps that drilling produced.

According to the utility model discloses drilling machine, include: the lifting device is arranged on the frame, and the bottom end of the lifting device is a lifting end and is connected with the mounting plate; the drilling mechanism comprises a rotating motor and a drill bit, the rotating motor is arranged on the mounting plate, the drill bit is connected with an output shaft of the rotating motor and at least partially positioned on the lower side of the bottom surface of the mounting plate; the protective assembly is arranged at the lower end of the mounting plate, at least partially surrounds the periphery of the drill bit and is used for blocking scraps generated in drilling; and the workbench is positioned on the lower side of the protection component and used for placing workpieces.

According to the utility model discloses drilling machine has following technological effect at least: through setting up protection component to make its at least part enclose and locate drill bit week side, stop the sweeps when the drill bit drills, thereby can avoid the sweeps to hurt operating personnel, the security performance is high.

According to some embodiments of the present invention, the protection assembly includes an installation seat, a protection cylinder and an elastic assembly, the installation seat is fixedly connected to the lower end of the installation plate, the protection cylinder is installed at the lower end of the installation seat through the elastic assembly, the elastic assembly is used for applying a downward elastic force to the protection cylinder, a containing cavity with an opening at the upper end is arranged in the protection cylinder, and a through hole which vertically penetrates through the bottom wall of the containing cavity is arranged; the output shaft of the rotating motor vertically penetrates through the mounting seat, the drill bit is fixedly connected to the bottom end of the output shaft and located above the through hole, and the protective cylinder can vertically move elastically to enable the drill bit to penetrate through the through hole.

According to the utility model discloses a some embodiments, the mounting panel lower extreme is equipped with a location section of thick bamboo, the embedding of mount pad upper end a location section of thick bamboo pastes rather than the inner wall mutually, in order to fix the lateral position of mount pad.

According to some embodiments of the utility model, be equipped with the second installation piece on the location section of thick bamboo, the connecting rod is installed in the vertical rotation on the second installation piece, the connecting rod bottom has set firmly the backup pad, the backup pad can rotate to with the mount pad bottom wall pastes or avoids the vertical extension route of mount pad.

According to the utility model discloses a some embodiments, can dismantle in the frame and be connected with two vertical extension's guide bar, two the guide bar interval sets up, mounting panel sliding sleeve is established two on the guide bar.

According to some embodiments of the utility model, the frame include the riser and set firmly in the first diaphragm and the second diaphragm at both ends about the riser, be equipped with the vertical connecting hole that runs through on the first diaphragm, be equipped with the connecting seat on the second diaphragm, the connecting hole and the connecting seat all with the guide bar matches, the guide bar upper end is worn to locate in the connecting hole, the lower extreme with connecting seat threaded connection.

According to some embodiments of the utility model, elevating gear's lift end is connected with the mounting bracket, the mounting bracket with the connection can be dismantled to the mounting panel.

According to the utility model discloses a some embodiments, be equipped with first splint and second splint on the workstation, first splint set firmly in on the workstation, the second splint can transversely elasticity movably install in on the workstation, and can cooperate first splint are in order to press from both sides tight work piece both ends.

According to the utility model discloses a some embodiments, the vertical connecting plate that is equipped with on the workstation, deviate from on the second splint one side of first splint is equipped with the second guide pillar, the cover is equipped with the second spring on the second guide pillar, the second spring is located the connecting plate with between the second splint, threaded connection has second stop nut on the second guide pillar, second stop nut is located the connecting plate deviates from one side of second splint.

According to some embodiments of the utility model, be equipped with in the frame and follow along the gliding mobile station of first horizontal direction and be used for driving it and follow the gliding first actuating mechanism of first horizontal direction, the workstation is followed second horizontal direction slidable mounting in the mobile station, be equipped with on the mobile station and be used for the drive the workstation is followed the gliding second actuating mechanism of second horizontal direction, first horizontal direction with the second horizontal direction is perpendicular.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic view of an installation structure of a drilling machine according to an embodiment of the present invention;

fig. 2 is a schematic transverse sectional view of a drilling machine according to an embodiment of the present invention;

FIG. 3 is a schematic view of the mounting structure of the drilling mechanism and guard assembly of an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a protective assembly according to an embodiment of the present invention;

fig. 5 is a schematic view of the structure of fig. 4 with the insert plate removed.

Reference numerals:

the device comprises a rack 100, a vertical plate 101, a first horizontal plate 102, a second horizontal plate 103, a connecting hole 104, a connecting seat 105, a lifting device 110, a mounting frame 111, a mounting plate 120, a positioning cylinder 121, a second mounting block 122, a connecting rod 123, a supporting plate 124, a third limiting nut 125, a guide rod 130, a moving platform 140, a first driving mechanism 141 and a second driving mechanism 142;

a drilling mechanism 200, a rotating motor 210, an output shaft 211, a drill bit 220;

the protective device comprises a protective component 300, a mounting seat 310, a first mounting block 311, a protective cylinder 320, a containing cavity 321, a through hole 322, an inserting plate 323, a water inlet pipe 324, a water guide plate 325, a water passing channel 326, an elastic component 330, a first guide pillar 331, a first spring 332, a first limit nut 333 and a positioning hole 334;

the working table 400, the first clamping plate 410, the second clamping plate 420, the second guide pillar 421, the second spring 422, the second limit nut 423 and the connecting plate 430.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1, 3, 4, the embodiment of the present invention provides a drilling machine, including: a frame 100, a drilling mechanism 200, a guard assembly 300, a table 400.

The frame 100 is provided with a lifting device 110, the bottom end of the lifting device 110 is a lifting end and is connected to a mounting plate 120, specifically, in this embodiment, the lifting device 110 is a hydraulic cylinder, and the mounting plate 120 is fixedly connected to the lifting end of the lifting device 110.

The drilling mechanism 200 comprises a rotary motor 210 and a drill bit 220, wherein the rotary motor 210 is arranged on the mounting plate 120, and the drill bit 220 is connected with an output shaft 211 of the rotary motor 210 and at least partially positioned on the lower side of the bottom surface of the mounting plate 120; specifically, an output shaft 211 of the rotating motor 210 is detachably and fixedly connected with the drill bit 220 to drive the drill bit 220 to rotate, the output shaft 211 of the rotating motor 210 vertically penetrates through the mounting plate 120, and the drill bit 220 is connected to the bottom end of the output shaft 211; it is understood that in the present embodiment, the lifting device 110 is used for driving the drill bit 220 to descend and contact with the workpiece, and the rotary motor 210 is used for driving the drill bit 220 to rotate for drilling.

The shield assembly 300 is mounted to the lower end of the mounting plate 120 and at least partially surrounds the drill bit 220 for blocking debris generated during drilling.

A table 400 is located on the underside of the guard assembly 300 for placing a workpiece.

According to the utility model discloses drilling machine is through setting up protection component 300 to make its at least part enclose and locate drill bit 220 week side, in order to block the sweeps when drill bit 220 drills, thereby can avoid the sweeps to injure operating personnel, the security performance is high.

Referring to fig. 1, 3 and 4, in some embodiments of the present invention, the protection assembly 300 includes a mounting seat 310, a protection cylinder 320 and an elastic assembly 330, the mounting seat 310 is fixedly connected to the lower end of the mounting plate 120, the protection cylinder 320 is mounted at the lower end of the mounting seat 310 through the elastic assembly 330, and the elastic assembly 330 is configured to apply a downward elastic force to the protection cylinder 320, so that the protection cylinder 320 can be prevented from moving up and down, and at the same time, the elastic assembly 330 can enable the protection cylinder 320 and the mounting seat 310 to elastically move relative to each other; an accommodating cavity 321 with an opening at the upper end is arranged in the protective cylinder 320, and a through hole 322 which vertically penetrates through the bottom wall of the accommodating cavity 321; specifically, in this embodiment, the mounting seat 310 and the protection barrel 320 are both cylindrical and coaxially disposed, the accommodating cavity 321 is a cylindrical cavity, and the inner diameter of the accommodating cavity 321 is greater than the outer diameter of the mounting seat 310, so that the mounting seat 310 can vertically move in the accommodating cavity 321 relative to the protection barrel 320. The output shaft 211 of the rotating motor 210 vertically penetrates through the mounting seat 310, the drill bit 220 is fixedly connected to the bottom end of the output shaft 211 and is positioned above the through hole 322, the protective cylinder 320 can vertically and elastically move to enable the drill bit 220 to penetrate through the through hole 322, and specifically, the drill bit 220, the through hole 322 and the mounting seat 310 are coaxially arranged; it should be noted that the above description of the drill 220 being located above the through hole 322 means that the drill 220 is located above the through hole 322 in a state that the protection cylinder 320 is not in contact with the workpiece, the drill 220 is at least partially located in the accommodating cavity 321, and furthermore, the protection cylinder 320 is capable of vertically and elastically moving relative to the mounting seat 310.

In this embodiment, during drilling, the lifting device 110 drives the mounting plate 120 to descend, the mounting plate 120 drives the mounting seat 310 and the protective cylinder 320 to descend synchronously, until the protective cylinder 320 contacts with a workpiece, the protective cylinder 320 is fixed in position, the mounting seat 310 and the drill bit 220 continue to descend, the drill bit 220 passes through the through hole 322 to process the workpiece, and since the drill bit 220 passes through the through hole 322 and the protective cylinder 320 can contact with the upper surface of the workpiece, waste chips at the drilling position can enter the accommodating cavity 321 through the through hole 322, the side wall of the accommodating cavity 321 can block the waste chips, and the waste chips cannot splash around, so that a chip blocking effect is achieved; and because the elastic component 330 can apply downward pressure to the protective cylinder 320, the protective cylinder 320 can also press the workpiece downward, so as to prevent the workpiece from shaking during processing.

In some specific embodiments, as shown in fig. 3 to 5, a plurality of first mounting blocks 311 are disposed on the peripheral wall of the mounting seat 310, and in particular, in this embodiment, three first mounting blocks 311 are arranged around the peripheral wall of the mounting seat 310; the elastic component 330 is provided with a plurality of, specifically three, corresponding to the first mounting block 311, the elastic component 330 includes a first guide post 331, a first spring 332, and a first limit nut 333, a bottom end of the first guide post 331 is fixedly disposed at a bottom wall of the accommodating cavity 321, a top end of the first guide post is vertically movably inserted into the corresponding first mounting block 311, the first spring 332 is sleeved on the first guide post 331, and two ends of the first spring 332 are respectively used for abutting against the first mounting block 311 and a bottom wall of the accommodating cavity 321, the first limit nut 333 is screwed on the first guide post 331 and is located above the first mounting block 311 for abutting against an upper end of the first mounting block 311 to prevent the first guide post 331 from separating from the first mounting block 311, in this embodiment, the first spring 332 is provided for applying an elastic force to the protection cylinder 320, the structure is simple and the cost is low, the first guide post 331 is provided for providing guiding and limiting for the first spring 332 so as to enable the first spring 332 to be stably and elastically deformed, the first guide post 331 is threadedly connected to the first limit nut 333, so that the elastic member 330 can be conveniently detached.

Further, as shown in fig. 4 and 5, in some specific embodiments, a positioning hole 334 is formed on the first guide post 331, the positioning hole 334 can vertically move with the first guide post 331 to be located above the first mounting block 311 and can penetrate through the columnar structure to limit the downward displacement of the first guide post 331, when the positioning hole 334 moves to be located above the first mounting block 311, the drill 220 passes through the through hole 322, so that before the drilling operation is performed, the positioning hole 334 can move to be located above the first mounting block 311 and penetrate through the columnar structure to protrude the bottom end of the drill 220 out of the bottom end of the protective cylinder 320, so that the drill 220 can be aligned with the drilling position, and the columnar structure can be removed after the drilling operation is performed. The peripheral wall of the protective cylinder 320 is provided with a notch, and the notch is detachably connected with an inserting plate 323 for closing the notch, so that the inserting plate 323 can be taken down after the processing is finished, the scraps in the accommodating cavity 321 can be cleaned, and the operation is convenient.

Still further, as shown in fig. 4 and 5, a plurality of water inlet pipes 324 communicated with the accommodating cavity 321 are further disposed on the circumferential wall of the protective cylinder 320, a plurality of sets of water guide plates 325 are disposed on the bottom wall of the accommodating cavity 321 corresponding to the water inlet pipes 324, two water guide plates 325 are disposed at intervals to form a water passage 326, one end of the water passage 326 extends to the side wall of the accommodating cavity 321 and is communicated with the water inlet pipe 324, and the other end extends to the edge of the through hole 322, so that cooling water can be input into the accommodating cavity 321 during drilling by disposing the water inlet pipes 324, and the water guide plates 325 are disposed to form the water passage 326, so that the cooling water can be guided to flow into the through hole 322 more smoothly, thereby cooling the drill bit 220.

Referring to fig. 3 and 4, in some embodiments of the present invention, the lower end of the mounting plate 120 is provided with a positioning cylinder 121, the upper end of the mounting seat 310 is embedded into the positioning cylinder 121, and is attached to the inner wall of the positioning cylinder 121, and the transverse position of the fixing mount seat 310 is provided, the mounting seat 310 and the positioning cylinder 121 can be detachably and fixedly connected, thereby realizing the fixed connection between the mounting seat 310 and the mounting plate 120, specifically, the mounting seat 310 and the positioning cylinder 121 are connected by screws, the embodiment is provided with the positioning cylinder 121, thereby being capable of positioning the mounting seat 310 when the mounting seat 310 is installed, and meanwhile, the mounting seat 310 can also play a transverse limiting role after the installation is completed, and the transverse shearing force received by the output shaft 211 penetrating through the mounting seat 310 is reduced.

Referring to fig. 3, in some embodiments of the present invention, the positioning cylinder 121 is provided with a plurality of second mounting blocks 122, specifically, the second mounting blocks 122 are disposed on the circumferential wall of the positioning cylinder 121, the second mounting blocks 122 are arranged in a surrounding manner around the circumferential wall of the positioning cylinder 121, the second mounting blocks 122 are vertically rotatably mounted with a connecting rod 123, a supporting plate 124 is fixedly disposed at the bottom end of the connecting rod 123, the supporting plate 124 can be rotated to be attached to the bottom wall of the mounting seat 310 or avoid the vertically extending path of the mounting seat 310, so that when the mounting seat 310 is mounted, the supporting plate 124 can be rotated to be attached to the bottom wall of the mounting seat 310 below the mounting seat 310, the mounting seat 310 can be supported, the mounting of the mounting seat 310 to the connecting member of the positioning cylinder 121 is facilitated, an operator does not need to hold the mounting seat 310 by hand, and the operation is more convenient; during disassembly, the supporting plate 124 is rotated to avoid the vertical extending path of the mounting seat 310; specifically, in this embodiment, the connecting rod 123 is rotatably disposed on the supporting plate 124 in a penetrating manner, and the upper end of the connecting rod 123 is threadedly connected with a third limiting nut 125, and the third limiting nut 125 is located on the upper side of the second mounting block 122 and is used for abutting against the upper end of the second mounting block 122.

Referring to fig. 1, in some embodiments of the present invention, the rack 100 is detachably connected with two guide rods 130 extending vertically, the two guide rods 130 are arranged at intervals, the sliding sleeve of the mounting plate 120 is disposed on the two guide rods 130, and the two guide rods 130 are arranged, so as to provide a guide for the lifting of the mounting plate 120 and prevent the lifting from shaking.

Referring to fig. 1, in some embodiments of the present invention, the rack 100 includes a vertical plate 101 and a first transverse plate 102 and a second transverse plate 103 fixedly disposed at upper and lower ends of the vertical plate 101, the first transverse plate 102 and the second transverse plate 103 are horizontally arranged, a connecting hole 104 vertically running through is disposed on the first transverse plate 102, a connecting seat 105 is disposed on the second transverse plate 103, the connecting hole 104 and the connecting seat 105 are all matched with the guide rod 130, specifically, the quantity is matched, the diameter of the connecting hole 104 is the same as that of the guide rod 130, the upper end of the guide rod 130 is arranged in the connecting hole 104, the lower end is in threaded connection with the connecting seat 105, specifically, a threaded hole is disposed in the connecting seat 105, the lower end of the guide rod 130 is provided with an external thread to be in threaded connection with the connecting seat 105, during installation, the guide rod 130 passes through the connecting hole 104 from top to bottom, and then is in threaded connection with the connecting seat 105, the reverse operation during disassembly is possible, and the disassembly is convenient.

Referring to fig. 1, in some embodiments of the present invention, the lifting end of the lifting device 110 is connected to a mounting frame 111, the mounting frame 111 is detachably connected to the mounting plate 120, and specifically, the mounting frame 111 is connected to the mounting plate 120 by screws, which is convenient for assembly and disassembly.

Referring to fig. 1 and 2, in some embodiments of the present invention, a first clamping plate 410 and a second clamping plate 420 are disposed on the workbench 400, the first clamping plate 410 is fixedly disposed on the workbench 400, the second clamping plate 420 can be transversely and elastically movably mounted on the workbench 400, and can cooperate with the first clamping plate 410 to clamp two ends of a workpiece, and can transversely and elastically movably mount on the workbench 400 by making the second clamping plate 420, so as to cooperate with the first clamping plate 410 to clamp workpieces of different sizes, therefore, the present invention has strong practicability, and is specific, in this embodiment, the first clamping plate 410 and the second clamping plate 420 are both vertically disposed, and are disposed at parallel intervals.

Referring to fig. 1 and 2, in some embodiments of the present invention, a connecting plate 430 is vertically disposed on the working table 400, one side of the second clamping plate 420 departing from the first clamping plate 410 is provided with a second guide pillar 421, a second spring 422 is sleeved on the second guide pillar 421, the second spring 422 is located between the connecting plate 430 and the second clamping plate 420, a second limit nut 423 is screwed on the guide pillar, the second limit nut 423 is located on one side of the connecting plate 430 departing from the second clamping plate 420, so as to prevent the second guide pillar 421 from being detached from the connecting plate 430, the transverse elastic movement of the second clamping plate 420 is realized through the above arrangement, the structure is simple, and the use is convenient.

Referring to fig. 1 and 2, in some embodiments of the present invention, the rack 100 is provided with a mobile station 140 capable of sliding along a first horizontal direction and a first driving mechanism 141 for driving the mobile station to slide along the first horizontal direction, specifically, the mobile station 140 is slidably mounted on the rack 100 by the cooperation of a wedge block and a wedge groove, and the first driving mechanism 141 may be a hydraulic cylinder or a telescopic motor; the workbench 400 is slidably mounted on the moving platform 140 along the second horizontal direction, the moving platform 140 is provided with a second driving mechanism 142 for driving the workbench 400 to slide along the second horizontal direction, specifically, the workbench 400 is slidably mounted on the moving platform 140 by the cooperation of the wedge block and the wedge groove, and the second driving mechanism 142 may be a hydraulic cylinder or a telescopic motor; the first horizontal direction is perpendicular to the second horizontal direction, and as shown in fig. 1, the first horizontal direction is a left-right direction, and the second horizontal direction is a front-back direction, and by the above arrangement, the movement of the table 400 in the front-back direction, the left-right direction, and the alignment of the drilling position with the drill 220 can be achieved.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example" or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A drilling machine, comprising:

the lifting device comprises a rack (100) which is provided with a lifting device (110), wherein the bottom end of the lifting device (110) is a lifting end and is connected with a mounting plate (120);

a drilling mechanism (200) comprising a rotary motor (210) and a drill bit (220), wherein the rotary motor (210) is mounted on the mounting plate (120), the drill bit (220) is connected with an output shaft (211) of the rotary motor (210) and is at least partially positioned at the lower side of the bottom surface of the mounting plate (120);

the protective assembly (300) is arranged at the lower end of the mounting plate (120), at least partially surrounds the periphery of the drill bit (220), and is used for blocking scraps generated in drilling;

and the workbench (400) is positioned at the lower side of the protective assembly (300) and is used for placing a workpiece.

2. The drilling machine according to claim 1, characterized in that the protective assembly (300) comprises a mounting seat (310), a protective cylinder (320) and an elastic assembly (330), the mounting seat (310) is fixedly connected to the lower end of the mounting plate (120), the protective cylinder (320) is mounted at the lower end of the mounting seat (310) through the elastic assembly (330), the elastic assembly (330) is used for applying downward elastic force to the protective cylinder (320), a containing cavity (321) with an opening at the upper end is arranged in the protective cylinder (320), and a through hole (322) vertically penetrates through the bottom wall of the containing cavity (321); the output shaft of the rotating motor (210) vertically penetrates through the mounting seat (310), the drill bit (220) is fixedly connected to the bottom end of the output shaft (211) and located above the through hole (322), and the protective cylinder (320) can vertically and elastically move to enable the drill bit (220) to penetrate through the through hole (322).

3. A drilling machine according to claim 2, characterized in that the lower end of the mounting plate (120) is provided with a positioning cylinder (121), and the upper end of the mounting seat (310) is embedded into the positioning cylinder (121) and attached to the inner wall thereof so as to fix the transverse position of the mounting seat (310).

4. The drilling machine according to claim 3, characterized in that a second mounting block (122) is arranged on the positioning cylinder (121), a connecting rod (123) is vertically and rotatably mounted on the second mounting block (122), a supporting plate (124) is fixedly arranged at the bottom end of the connecting rod (123), and the supporting plate (124) can rotate to be attached to the bottom wall of the mounting seat (310) or avoid the vertically extending path of the mounting seat (310).

5. The drilling machine according to claim 1, characterized in that two vertically extending guide rods (130) are detachably connected to the machine frame (100), the two guide rods (130) are arranged at intervals, and the mounting plate (120) is slidably sleeved on the two guide rods (130).

6. The drilling machine according to claim 5, characterized in that the machine frame (100) comprises a vertical plate (101), and a first transverse plate (102) and a second transverse plate (103) which are fixedly arranged at the upper end and the lower end of the vertical plate (101), wherein a connecting hole (104) which vertically penetrates through is formed in the first transverse plate (102), a connecting seat (105) is formed in the second transverse plate (103), the connecting hole (104) and the connecting seat (105) are matched with the guide rod (130), the upper end of the guide rod (130) penetrates through the connecting hole (104), and the lower end of the guide rod is in threaded connection with the connecting seat (105).

7. A drilling machine according to claim 5, characterized in that a mounting bracket (111) is connected to the lifting end of the lifting device (110), the mounting bracket (111) being detachably connected to the mounting plate (120).

8. The drilling machine according to claim 1, characterized in that a first clamping plate (410) and a second clamping plate (420) are arranged on the workbench (400), the first clamping plate (410) is fixedly arranged on the workbench (400), and the second clamping plate (420) can be transversely and elastically movably arranged on the workbench (400) and can be matched with the first clamping plate (410) to clamp two ends of a workpiece.

9. The drilling machine according to claim 8, characterized in that a connecting plate (430) is vertically arranged on the worktable (400), a second guide post (421) is arranged on one side of the second clamping plate (420) facing away from the first clamping plate (410), a second spring (422) is sleeved on the second guide post (421), the second spring (422) is positioned between the connecting plate (430) and the second clamping plate (420), a second limit nut (423) is connected to the second guide post (421) in a threaded manner, and the second limit nut (423) is positioned on one side of the connecting plate (430) facing away from the second clamping plate (420).

10. Drilling machine according to claim 1, characterized in that the machine frame (100) is provided with a mobile station (140) capable of sliding along a first horizontal direction and a first driving mechanism (141) for driving the mobile station to slide along the first horizontal direction, the work table (400) is mounted on the mobile station (140) in a sliding manner along a second horizontal direction, the mobile station (140) is provided with a second driving mechanism (142) for driving the work table (400) to slide along the second horizontal direction, and the first horizontal direction is perpendicular to the second horizontal direction.