CN215746563U

CN215746563U - Handheld drilling machine

Info

Publication number: CN215746563U
Application number: CN202121642343.XU
Authority: CN
Inventors: 李小蒙; 宋贤静
Original assignee: Nanjing Jingjiang Home Furnishing Co ltd
Current assignee: Nanjing Jingjiang Home Furnishing Co ltd
Priority date: 2021-07-19
Filing date: 2021-07-19
Publication date: 2022-02-08
Anticipated expiration: 2031-07-19

Abstract

The utility model relates to a handheld drilling machine, it relates to drilling mechanical equipment field, and it includes the casing, sets up drill chuck and the drill bit of rotation connection on drill chuck on the casing, still includes a cover section of thick bamboo, a cover section of thick bamboo slip cover is established on drill chuck, a cover section of thick bamboo is kept away from and is equipped with the machined hole that supplies the drill bit to pass on the lateral wall of casing, be equipped with the clearance subassembly in the cover section of thick bamboo, a cover section of thick bamboo is kept away from and is equipped with on the lateral wall of drill bit and inhales the bits pipe, inhale the inside intercommunication of bits pipe and cover section of thick bamboo, be equipped with the collection bits subassembly that is used for clearing up sweeps on cover section of thick bamboo inside wall and the drill chuck lateral wall on the casing, it links to each other with collection bits subassembly to inhale the bits pipe. This application has the effect of automatic collection and the sweeps that the clearance drilling machine during operation produced to reduce staff's work load.

Description

Handheld drilling machine

Technical Field

The application relates to the field of drilling mechanical equipment, in particular to a handheld drilling machine.

Background

The hand-held perforating drilling machine is a building machine, and in the fields of building and industry, perforating machines are widely applied to hole machining of building beams, plates, columns and walls and hole machining of various parts, wherein the application of the hand-held perforating machine is increasingly common.

Chinese patent with publication number CN109304500A discloses a handheld drilling machine, which comprises a housing, a drill chuck and a drill bit, the inside fixed mounting of casing has a motor, the lower part of casing is main handle, the upper end fixed mounting of handle has a switch, the switch is connected with the motor electricity, the drill chuck sets up the front end at the casing, the drill chuck is connected with the rotation axis of motor and rotates, the drill bit is fixed to be set up in the drill chuck, the casing upper end is fixed and is provided with the stand, the stand has the horizontal pole towards one side fixed mounting of drill bit, the horizontal pole is on a parallel with the drill bit, the horizontal pole is marked with the scale, slidable mounting has a pushing plate on the horizontal pole.

With respect to the related art among the above, the inventors consider that the following drawbacks exist: the drilling machine can produce a large amount of sweeps when drilling to plank or wall, needs artifical clearance, has increased staff's work load.

SUMMERY OF THE UTILITY MODEL

In order to improve the problem that the sweeps need the manual clearance of staff of production among the punching process, this application provides a handheld drilling machine that punches.

The application provides a handheld hole drilling machine adopts following technical scheme:

the utility model provides a handheld drilling machine, includes the casing, sets up drill chuck and the drill bit of rotating connection on drill chuck on the casing, its characterized in that: still include a cover section of thick bamboo, a cover section of thick bamboo slip cover is established on the drill chuck, a cover section of thick bamboo is kept away from and is equipped with the processing hole that supplies the drill bit to pass on the lateral wall of casing, be equipped with the clearance subassembly that is used for clearing up drill chuck lateral wall and cover section of thick bamboo inside wall in the cover section of thick bamboo, a cover section of thick bamboo is kept away from and is equipped with on the lateral wall of drill bit and inhales the bits pipe, inhale bits pipe and the inside intercommunication of a cover section of thick bamboo, be equipped with the collection bits subassembly that is used for collecting the inside sweeps of a cover section of thick bamboo on the casing, it links to each other with collection bits subassembly to inhale the bits pipe.

Through adopting above-mentioned technical scheme, during punching, utilize the cover section of thick bamboo to cover the drill bit, keep apart the sweeps that the in-process that punches produced in the cover section of thick bamboo, utilize the clearance subassembly simultaneously with drill chuck lateral wall and cover section of thick bamboo inside wall on absorbent sweeps scrape the cover section of thick bamboo in, utilize at last to inhale the sweeps pipe and collect the sweeps of bits subassembly in with the cover section of thick bamboo, make things convenient for the staff to the sweeps centralized processing, reduced staff's work load.

Optionally, be equipped with the hole that slides that supplies the drill chuck to slide on the lateral wall that the cover section of thick bamboo is close to the casing, the clearance subassembly is including the first strip of scraping that is used for clearing up the drill chuck, first strip and the butt of drill chuck lateral wall of scraping, be equipped with the scraper blade that is used for clearing up the cover section of thick bamboo inside wall in the cover section of thick bamboo, the scraper blade is scraped strip and cover section of thick bamboo inside wall butt through the second, the scraper blade is kept away from and is equipped with the spliced pole on the side of drill bit, the spliced pole is kept away from the one end of scraper blade and is passed the lateral wall of a cover section of thick bamboo and with casing fixed connection, the spliced pole slides with a cover section of thick bamboo and is connected.

Through adopting above-mentioned technical scheme, because the drill bit is when drilling, the cover section of thick bamboo slides on the drill chuck along with the displacement when the drill bit is drilled, the first strip of scraping this moment is along with the slip of cover section of thick bamboo and scrapes the adsorbed sweeps of drill chuck lateral wall to the cover section of thick bamboo in, the second is scraped the strip and also is along with the slip of cover section of thick bamboo and scrapes the adsorbed sweeps on the cover section of thick bamboo inside wall to the cover section of thick bamboo in simultaneously. The outer side wall of the drill chuck and the inner side wall of the cover cylinder can be automatically cleaned in the drilling process by utilizing the first scraping strip and the second scraping strip, so that the workload of workers is reduced.

Optionally, the longitudinal sectional area of the first scraping strip increases progressively from the side close to the drill chuck to the side far from the drill chuck, and the longitudinal sectional area of the second scraping strip decreases progressively from the side close to the cover cylinder to the side far from the cover cylinder.

By adopting the technical scheme, the longitudinal sectional area of the first scraping strip is gradually reduced from one side of the inner side wall of the sliding hole to one side close to the outer side wall of the drill chuck, so that the contact area of the first scraping strip against the side wall of the drill chuck is reduced, the friction force between the first scraping strip and the outer side wall of the drill chuck is reduced, and the scrap scraping effect is improved; the longitudinal section area that sets up the second and scrape the strip increases progressively by a lateral direction that keeps away from a cover section of thick bamboo to the one side that is close to a cover section of thick bamboo, and then the contact area of the second scraping strip butt cover section of thick bamboo inside wall is little, has reduced the first frictional force of scraping between strip and the cover section of thick bamboo inside wall, has improved and has scraped the bits effect.

Optionally, the chip collecting assembly comprises an air pump, an air pumping pipe and a connecting box, the air pump is arranged on the shell, one end of the air pumping pipe is connected with the chip sucking pipe, the other end of the air pumping pipe is connected with an air inlet pipe of the air pump, an air outlet pipe of the air pump is communicated with the inside of the connecting box, and an air outlet opening is formed in the side wall, far away from the air pump, of the connecting box.

Through adopting above-mentioned technical scheme, the air extractor during operation inhales the connecting box through inhaling the sweeps of bits pipe and exhaust tube in with the cover section of thick bamboo, and the air is discharged through the opening of giving vent to anger, has realized collecting the sweeps that produces in the course of working in the cover section of thick bamboo, has alleviateed staff's work load.

Optionally, be equipped with cavity and lower cavity in the connecting box, be equipped with the connecting block in the epicoele body, be equipped with the filter core in the connecting block, the internal album bits box that can dismantle of cavity down is equipped with, go up cavity and cavity down and communicate on one side that the filter core is close to the air extractor end of giving vent to anger.

By adopting the technical scheme, the filter element is utilized to separate the waste scraps and air entering the connecting box, and finally the waste scraps fall into the scrap collecting box under the action of self gravity, so that the automatic collection of the waste scraps is realized, and the workload of workers is reduced; the filter element is detachably connected in the connecting block, so that the filter element can be replaced, and the waste chip separation effect is improved; the scrap collecting box is detachably connected in the lower cavity, so that the personnel can clean the scraps in the scrap collecting box conveniently.

Optionally, an electromagnet is arranged on the side wall, close to the cover cylinder, of the shell, a permanent magnet is arranged on the side wall, close to the shell, of the cover cylinder, the electromagnet is connected with the permanent magnet in a magnetic adsorption mode, a switch is arranged on the shell and electrically connected with the electromagnet, a spring is sleeved on the drill chuck, one end of the spring is connected with the shell, and the other end of the spring is connected with the cover cylinder.

Through adopting above-mentioned technical scheme, when the rig is out of work or when needing to be changed the drill bit, the electro-magnet circular telegram, the electro-magnet is connected with permanent magnet magnetic adsorption this moment, the spring compression, the cover section of thick bamboo slides the one end that the drill chuck is close to the casing, the one end that the casing was kept away from to the drill chuck this moment exposes, the workman of being convenient for changes the drill bit, also can be convenient for the workman aim at the position that needs processing, do not shelter from workman's sight, when the rig needs work, the electro-magnet does not circular telegram, the electro-magnet loses magnetism, electro-magnet and permanent magnet separation this moment, the cover section of thick bamboo supports tight work area under the spring action, all sweeps are all kept apart in the cover section of thick bamboo.

Optionally, a limiting protrusion is arranged on the side wall of the drill chuck.

By adopting the technical scheme, the limiting bulge limits the maximum sliding distance of the cover cylinder on the drill chuck, and prevents the cover cylinder from separating from the drill chuck due to overlarge spring force.

Optionally, the shroud is provided with a brush.

By adopting the technical scheme, the hairbrush can adapt to uneven working planes during machining, the cover cylinder can tightly support different working planes, and meanwhile, the hairbrush can clean the machined planes; when collecting the bits, there is the gap between brush and the work plane, forms the negative pressure in the cover section of thick bamboo when the air extractor bleeds of being convenient for to collect the sweeps in the cover section of thick bamboo.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when in processing, the cover cylinder is used for isolating the waste chips generated during drilling of the drill bit from the outside, the cleaning assembly is used for scraping the waste chips on the outer side wall of the drill chuck and the inner side wall of the cover cylinder, and the waste chips are collected uniformly by the chip collecting assembly, so that the automatic collection of the waste chips in the processing process is realized, and the workload of workers is reduced;

2. when the cover cylinder and the drill chuck generate relative displacement, the first scraping strip is used for scraping the waste chips adsorbed on the outer side wall of the drill chuck, and the second scraping strip is used for scraping the waste chips adsorbed on the inner side wall of the cover cylinder;

3. when the electromagnet is electrified and is connected with the permanent magnet in a magnetic adsorption way, the cover cylinder is positioned on one side of the drill chuck close to the shell, so that personnel can conveniently aim at a processing point and replace a drill bit; when the electromagnet is not electrified, the cover cylinder is tightly propped against the processing plane under the action of the elastic force of the spring, so that the effect of collecting the scraps is improved.

Drawings

Fig. 1 is a schematic overall structure diagram of a handheld hole drilling machine in an embodiment of the present application.

Fig. 2 is a sectional view taken along the plane a-a in fig. 1.

Fig. 3 is an enlarged view of a portion a in fig. 2.

Fig. 4 is a sectional view taken along the plane B-B in fig. 1.

Fig. 5 is an enlarged view at B in fig. 4.

Description of reference numerals: 1. a housing; 2. a drill chuck; 3. a drill bit; 4. a cover cylinder; 5. machining a hole; 6. cleaning the assembly; 61. a first wiper strip; 62. a squeegee; 63. a second wiper strip; 64. connecting columns; 7. a scrap suction pipe; 8. a chip collecting assembly; 81. an air extractor; 82. an air exhaust pipe; 83. a scrap collecting box; 84. a connection box; 841. an upper cavity; 842. a lower cavity; 843. connecting blocks; 844. a filter element; 9. a sliding hole; 10. an air outlet opening; 11. an electromagnet; 12. a permanent magnet; 13. a switch; 14. a spring; 15. a limiting bulge; 16. and a brush.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses handheld drilling machine.

Referring to fig. 1 and 2, the hand-held hole drilling machine comprises a shell 1, a drill chuck 2 and a drill bit 3, wherein the drill chuck 2 is fixedly welded on the shell 1, the drill bit 3 is rotatably connected on the drill chuck 2, and a driving assembly for driving the drill bit 3 to rotate is arranged in the drill chuck 2. The drill chuck 2 is slidably sleeved with a cover cylinder 4, a sliding hole 9 for the drill chuck 2 to slide is formed in the end wall of one side of the cover cylinder 4, a machining hole 5 for the drill bit 3 to pass through is formed in the end wall of the other side of the cover cylinder 4, the machining hole 5 is circular, and the aperture of the machining hole 5 is larger than the diameter of the drill bit 3. Be equipped with in the cover section of thick bamboo 4 and be used for clearing up the clearance subassembly 6 of 4 inside walls of cover section of thick bamboo and 2 lateral walls of drill chuck, cover section of thick bamboo 4 is equipped with on the lateral wall towards casing 1 with the inside intercommunication of cover section of thick bamboo 4 inhale bits pipe 7, be equipped with collection bits subassembly 8 on casing 1, inhale bits pipe 7 and be connected with collection bits subassembly 8.

When punching, utilize cover section of thick bamboo 4 to cover drill bit 3, keep apart in cover section of thick bamboo 4 the sweeps that the in-process that will punch produced, utilize clearance subassembly 6 to scrape the cover section of thick bamboo 4 with 2 lateral walls of drill chuck and the adsorbed sweeps on the 4 inside walls of cover section of thick bamboo simultaneously, utilize at last to inhale sweeps pipe 7 and collect sweeps subassembly 8 and collect the sweeps in the cover section of thick bamboo 4, make things convenient for the staff to handle the sweeps centralized, reduced staff's work load.

Referring to fig. 3, the cleaning assembly 6 includes a first scraping strip 61 arranged in an annular shape, an outer annular wall of the first scraping strip 61 is connected to a hole wall of the sliding hole 9 of the cover cylinder 4 in an adhesive manner, and an inner annular wall of the first scraping strip 61 is abutted to an outer side wall of the drill chuck 2; when the cover cylinder 4 and the drill chuck 2 generate relative displacement, the first scraping strip 61 scrapes the scraps adsorbed on the outer side wall of the drill chuck 2.

In this embodiment, the longitudinal sectional area of the first scraping strip 61 is gradually increased from the side close to the drill chuck 2 to the side far from the drill chuck 2, so that the contact area between the first scraping strip 61 and the side wall of the drill chuck 2 is small, the friction force between the first scraping strip 61 and the outer side wall of the drill chuck 2 is reduced, and the scraping effect is improved.

A circular scraping plate 62 is arranged in the cover cylinder 4, a second scraping strip 63 is fixedly adhered to the outer annular wall of the scraping plate 62, the outer annular wall of the second scraping strip 63 is abutted to the inner side wall of the cover cylinder 4, at least two connecting columns 64 are welded to the side wall, close to the shell 1, of the scraping plate 62, one ends, far away from the scraping plate 62, of the connecting columns 64 penetrate through the cover cylinder 4 and are welded with the shell 1, and the connecting columns 64 are connected with the side wall, close to the shell 1, of the cover cylinder 4 in a sliding mode; when the cover cylinder 4 and the drill chuck 2 generate relative displacement, the second scraping strip 63 scrapes off the scraps adsorbed on the inner side wall of the cover cylinder 4.

In this embodiment, the longitudinal section area of the second scraping strip 63 decreases progressively from the side close to the cover cylinder 4 toward the side far away from the cover cylinder 4, so that the contact area of the second scraping strip 63 against the inner side wall of the cover cylinder 4 is small, the friction force between the second scraping strip 63 and the inner side wall of the cover cylinder 4 is reduced, and the scrap scraping effect is improved.

By adopting the cleaning mode, when the cover cylinder 4 slides, the first scraping strip 61 cleans the outer side wall of the drill chuck 2, and the second scraping strip 63 cleans the inner side wall of the cover cylinder 4, so that the automatic cleaning is realized, and the cleaning efficiency is high.

Referring to fig. 4 and 5, the chip collecting assembly 8 includes an air pump 81, an air exhaust pipe 82 and a connecting box 84, the air pump 81 is fixedly installed on the housing 1, an air inlet pipe of the air pump 81 is provided with the air exhaust pipe 82 in a communicating manner, one end of the air exhaust pipe 82 far away from the air pump 81 is communicated with the chip suction pipe 7, the connecting box 84 is installed on the housing 1, an air outlet pipe of the air pump 81 is communicated with the inside of the connecting box 84, one side of the connecting box 84 far away from the air pump 81 is provided with an air outlet opening 10, the inside of the connecting box 84 is fixedly provided with a partition board for partitioning the inside of the connecting box 84 into an upper cavity 841 and a lower cavity 842, a connecting block 843 is installed in the upper cavity 841, the top of the connecting box 84 is provided with an opening communicated with the upper cavity 841, the opening is used for inserting the connecting block 843 into the upper cavity 841, a filter core 844 is inserted and connected in the connecting block 843, the filter core 844 completely seals the air outlet opening 10, the partition board is provided with a communicating opening at one side of the filter core 844 close to the air outlet pipe of the air pump 81, such that upper chamber 841 is in communication with lower chamber 842; a chip collecting box 83 is arranged in the lower cavity 842, and a cleaning opening for drawing out the chip collecting box 83 is formed in the side wall of the connecting box 84.

When the scraps are extracted, the air extractor 81 is started, the scraps in the cover cylinder 4 are sucked into the connecting box 84 through the scrap sucking pipe 7 and the air extracting pipe 82, the scraps entering the connecting box 84 are separated from air by using the filter element 844, the air is discharged from the air outlet opening 10, and finally the scraps fall into the scrap collecting box 83 under the action of self gravity, so that the uniform collection of the scraps is realized; when the operation is finished, the personnel can draw the scrap collecting box 83 out of the connecting box 84, so that the personnel can clean the scraps conveniently; after the filter element 844 is used for a long time, the filter element 844 is easily blocked by the waste scraps, and at the moment, a person can draw out the connecting block 843 from the connecting box 84 and replace the filter element 844, so that the influence on the filtering effect of the waste scraps is avoided.

Referring to fig. 4, the side wall of the cover cylinder 4 far away from the housing 1 is provided with the brush 16, so that the cover cylinder 4 can be tightly abutted to different planes, and after the cover cylinder is machined, the brush 16 cleans the machining position, so that the waste chips are collected more thoroughly.

Referring to fig. 3, a spring 14 is sleeved on the drill chuck 2, one end of the spring 14 is connected with the casing 1, the other end of the spring 14 is connected with the cover cylinder 4, a permanent magnet 12 is fixedly arranged on the side wall of the cover cylinder 4 close to the casing 1, an electromagnet 11 is fixedly arranged on the side wall of the casing 1 close to the cover cylinder 4, and a switch 13 electrically connected with the electromagnet 11 is arranged on the casing 1. The switch 13 is turned on, the electromagnet 11 is electrified and is in magnetic adsorption connection with the permanent magnet 12, and the cover cylinder 4 slides towards the shell 1; when the switch 13 is turned off, the electromagnet 11 is powered off, the cover cylinder 4 slides towards the direction of the drill bit 3, the drill bit 3 is in the sliding process, the first scraper blade 62 cleans the waste chips adsorbed on the outer side wall of the drill chuck 2, the second scraper blade 62 cleans the waste chips adsorbed on the inner side wall of the cover cylinder 4, the automatic cleaning of the drill chuck 2 and the cover cylinder 4 is realized, and the cleaning efficiency is high.

When the drill bit 3 needs to be replaced, the switch 13 is turned on, the electromagnet 11 is electrified and is connected with the permanent magnet 12 in a magnetic adsorption mode, at the moment, the spring 14 is compressed, the cover cylinder 4 slides to one side, close to the shell 1, of the drill chuck 2 along with the permanent magnet 12, and a person can replace the drill bit 3 conveniently. When drilling is needed, the electromagnet 11 is powered off, the cover cylinder 4 slides to one side of the drill chuck 2 far away from the shell 1 under the elastic action of the spring 14, the machining hole of the cover cylinder 4 is tightly abutted to the machining surface, and the sweeps generated when the drill bit 3 is machined through the cover cylinder 4 are isolated, so that the sweeps are prevented from splashing everywhere.

Referring to fig. 4, the side wall of the drill chuck 2 is provided with a limiting protrusion 15 to prevent the spring 14 from having too large elasticity and pushing the cover cylinder 4 away from the drill chuck 2.

The implementation principle of the handheld hole drilling machine in the embodiment of the application is as follows: before drilling, firstly, the switch 13 is pressed down to enable the electromagnet 11 to be in magnetic adsorption connection with the permanent magnet 12, at the moment, the cover cylinder 4 slides to one side of the drill chuck 2 close to the shell 1, and personnel can replace the drill bit 3 and align to the position needing drilling; when drilling is to be carried out, the switch 13 is pressed down to disconnect the electromagnet 11 from the permanent magnet 12, at the moment, the cover cylinder 4 is tightly pressed against a processing surface under the action of the elastic force of the spring 14, and after the air pump 81 is started, the drill bit 3 can carry out drilling; drill bit 3 produces relative displacement with the processing plane in drilling process, cover cylinder 4 produces relative displacement along with drill bit 3 and drill chuck 2's removal this moment, utilize first scraper blade 62 will adsorb and scrape down the sweeps at drill chuck 2 lateral wall, utilize second scraper blade 62 will adsorb and scrape down the sweeps on cover cylinder 4 inside wall, under air extractor 81's operation, the sweeps gets into in the connecting box 84 through inhaling bits pipe 7 and exhaust tube 82, sweeps and the air that get into in the connecting box 84 are separated by filter core 844, finally the sweeps drops into in album bits box 83 under self action of gravity, the collection to the sweeps when having realized drilling, staff's work load has been reduced.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a handheld drilling machine, includes casing (1), sets up drill chuck (2) and the drill bit (3) of rotating connection on drill chuck (2) on casing (1), its characterized in that: still include a cover section of thick bamboo (4), cover section of thick bamboo (4) slip cover is established on drill chuck (2), be equipped with on the lateral wall that casing (1) was kept away from in cover section of thick bamboo (4) and supply drill bit (3) to pass fabrication hole (5), be equipped with in cover section of thick bamboo (4) and be used for clearing up clearance subassembly (6) of drill chuck (2) lateral wall and cover section of thick bamboo (4) inside wall, be equipped with on the lateral wall that drill bit (3) was kept away from in cover section of thick bamboo (4) and inhale bits pipe (7), inhale the inside intercommunication of bits pipe (7) and cover section of thick bamboo (4), be equipped with collection bits subassembly (8) that are used for collecting the inside sweeps of cover section of thick bamboo (4) on casing (1), it links to each other with collection bits subassembly (8) to inhale bits pipe (7).

2. The hand-held hole drilling machine of claim 1, wherein: be equipped with on the lateral wall that cover section of thick bamboo (4) is close to casing (1) and supply drill chuck (2) to slide sliding hole (9), clearance subassembly (6) are including first scraping strip (61) that are used for clearing up drill chuck (2), first scraping strip (61) and drill chuck (2) lateral wall butt, be equipped with scraper blade (62) that are used for clearing up cover section of thick bamboo (4) inside wall in cover section of thick bamboo (4), scraper blade (62) are scraped strip (63) and cover section of thick bamboo (4) inside wall butt through the second, be equipped with spliced pole (64) on the side that drill bit (3) were kept away from in scraper blade (62), spliced pole (64) are kept away from the one end of scraper blade (62) and are passed the lateral wall of cover section of thick bamboo (4) and are connected with casing (1) fixed connection, spliced pole (64) and cover section of thick bamboo (4) are connected that slides.

3. The hand-held hole-drilling machine of claim 2, wherein: the longitudinal sectional area of the first scraping strip (61) increases progressively from the side close to the drill chuck (2) to the side far away from the drill chuck (2), and the longitudinal sectional area of the second scraping strip (63) decreases progressively from the side close to the cover cylinder (4) to the side far away from the cover cylinder (4).

4. The hand-held hole drilling machine of claim 1, wherein: chip collecting assembly (8) includes aspirator (81), exhaust tube (82) and connecting box (84), aspirator (81) set up on casing (1), exhaust tube (82) one end links to each other with chip suction pipe (7), the other end of exhaust tube (82) links to each other with the intake pipe of aspirator (81), the outlet duct and the inside intercommunication of connecting box (84) of aspirator (81), be equipped with air outlet opening (10) on the lateral wall that air aspirator (81) were kept away from in connecting box (84).

5. The hand-held hole drilling machine of claim 4, wherein: be equipped with cavity (841) and lower cavity (842) in connecting box (84), be equipped with connecting block (843) in last cavity (841), be equipped with filter core (844) in connecting block (843), can dismantle in lower cavity (842) and be equipped with collection bits box (83), go up cavity (841) and lower cavity (842) and be close to the one side intercommunication of air extractor (81) end of giving vent to anger at filter core (844).

6. The hand-held hole drilling machine of claim 1, wherein: be equipped with electro-magnet (11) on the lateral wall that casing (1) is close to cover section of thick bamboo (4), be equipped with permanent magnet (12) on the lateral wall that cover section of thick bamboo (4) is close to casing (1), electro-magnet (11) are connected with permanent magnet (12) magnetic adsorption, be equipped with switch (13) on casing (1), switch (13) and electro-magnet (11) electricity are connected, the cover is equipped with spring (14) on drill chuck (2), spring (14) one end links to each other with casing (1), the spring (14) other end links to each other with cover section of thick bamboo (4).

7. The hand-held hole drilling machine of claim 1, wherein: the side wall of the drill chuck (2) is provided with a limiting bulge (15).

8. The hand-held hole drilling machine of claim 1, wherein: and a brush (16) is arranged on the side wall of the cover cylinder (4) far away from the shell (1).