An electric drill capable of accurately adjusting the drilling depth

Abstract

The present application relates to electric drill technical field, specifically said is a kind of electric drill of accurate adjustment drilling depth, including shell, install on the drilling mechanism and protection mechanism of shell, limit mechanism is installed on protection mechanism;Operator can release the limiting of two sliding rods by limit mechanism when drilling in supine position, two springs open at this time, further bellows can extend, drill bit is contacted with drilled object when drilling, contact circle located at the end of bellows is contacted with drilled object, form a closed space, realize that the debris is collected in the inside of bellows when drilling, effectively prevent the debris produced in the process of drilling from flying everywhere, protect the safety of operator and the neatness of surrounding environment, clean the debris inside bellows after drilling, if drilling on the tabletop, two sliding rods are moved to right, pass through the sliding plate and insert into the inside of clamping groove, realize the limiting of sliding rod, at this time, bellows contracts, will not affect the drilling sight line of drill bit, operation is simple.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric drills, and particularly relates to an electric drill capable of accurately adjusting drilling depth. BACKGROUND

[0002] An electric drill is an electric power tool that utilizes electric power to drive a rotating or impacting mechanism to realize drilling, screwing and other operations, and is widely applied to the fields of construction, decoration, woodworking and metal processing. The core feature of the electric drill is to convert electric energy into mechanical energy to provide efficient and accurate power output. The electric drill is an electric power tool that rotates a drill bit or a screwdriver bit (or combines an impacting action) driven by an electric motor to drill holes or install / dismantle screws on materials such as wood, metal and concrete. The electric drill mainly comprises a power source, a motor, a chuck and a drill bit. The chuck of the electric drill needs to be locked by a special key and is suitable for high-precision operations. The electric drill can be powered by a battery installed thereon or by a power source connected through a connecting line.

[0003] However, in the prior art, when the electric drill drills holes in an object, the drill bit is fixed by the chuck, the electric drill is connected to the power source, the drill bit is aligned with the drilling position, and force is applied to the object to realize drilling. When drilling holes in a ceiling in indoor decoration, the end of the electric drill is not provided with a protection assembly, and the operator needs to look up when drilling holes. The debris generated during drilling can easily fall into the eyes, nostrils and other parts of the operator, which is harmful to the health of the drilling personnel and the comfort during drilling. In the prior art, a handle is usually provided on the electric drill in addition to the handle to assist in holding. At present, the handle on the electric drill is directly fixed on the shell, and the angle of the handle is not convenient to adjust. It is not convenient to adjust the direction of holding the handle according to the drilling environment. When the space is small or the bottom is blocked by an obstacle, it is not convenient to drill holes. In addition, the hand cannot hold the handle during drilling, the vibration during drilling is large, and the accuracy of drilling is affected. At present, the handheld electric drill can only be held in the hand to drill holes in objects, and it is not convenient to install the handheld electric drill on a screw rod type driving member to accurately drill holes in batches of plates. SUMMARY

[0004] In view of the problems in the prior art, the present application provides an electric drill capable of accurately adjusting drilling depth.

[0005] The technical scheme adopted by the present application to solve its technical problems is: a drill capable of accurately adjusting drilling depth, comprising a shell, a drilling mechanism and a protection mechanism mounted on the shell, and a limiting mechanism mounted on the protection mechanism; the protection mechanism comprises a fixed ring, the shell is slidably connected with the fixed ring, a screw threadedly connected with the surface of the shell is arranged on the fixed ring, a fixed ring is welded at the edge of the surface of the fixed ring, a bellows is fixedly connected to the side surface of the fixed ring, an abutting ring is fixedly connected to the end of the bellows, a slide rod is fixedly connected to the side surface of the abutting ring, a baffle is fixedly connected to the slide rod, a spring I is clamped between the baffle and the fixed ring, and the slide rod is slidably connected with the fixed ring; the limiting mechanism comprises a slide rail and a slide plate, the slide rail is welded to the fixed ring away from the bellows, the slide plate is slidably connected between the slide rail and the fixed ring, and a clamping groove is formed in the slide rod and clamped with the slide plate.

[0006] Specifically, the slide rod is symmetrically provided about the axis of the bellows, and the cross section of each of the two slide rods is in T-shaped structure.

[0007] Specifically, two slide rails are oppositely arranged about the center of the side surface of the fixed ring, and the slide plate is slidably connected inside each of the two slide rails, the thickness of the slide plate is equal to the thickness of the clamping groove, and the slide plate and the slide rail are in arc-shaped structure.

[0008] Specifically, the limiting mechanism further comprises a spring II and a tab, the spring II is clamped between the two slide rails and the two slide plates, and the tab is fixedly connected to the opposite end of each of the two slide plates.

[0009] Specifically, the fixed ring is provided with an adjusting mechanism, the adjusting mechanism comprises a side plate, the side plate is welded to the side surface of the fixed ring, a stop rod is slidably connected to the side plate, and a knob threadedly connected with the stop rod is arranged on the side plate.

[0010] Specifically, the adjusting mechanism further comprises a scale and a movable opening, the scale is arranged on the surface of the stop rod, the movable opening corresponding to the slide rod is arranged on the side plate, the cross section of the stop rod is in T-shaped structure, and the side surface of the stop rod is in regular hexagonal structure.

[0011] Specifically, the drilling mechanism comprises a handle, the handle is connected to the shell, a switch is mounted on the handle, a driving mechanism group is mounted in the shell, a chuck is connected to the end of the driving mechanism group, a drill bit is mounted on the chuck, and the end of the drill bit is flush with the end of the stop rod.

[0012] Specific, the shell is equipped with mounting mechanism, the mounting mechanism includes fixed block, the shell is opposite and is welded with two fixed blocks, two fixed blocks are fixedly connected through screw, two fixed blocks are opposite and are provided with sliding block, the surface center of sliding block is provided with screw groove, two guide holes are symmetrically provided on the surface of sliding block, the opposite sides of two fixed blocks are fixedly connected with the sliding shell of arc structure, the inside of two sliding shells on the same side is provided with inner groove, the section of inner groove is T-shaped structure, the inside of four inner grooves is slidably connected with sliding strip, the opposite two sliding shells are circular structure, the sliding strip is arc structure, the inside of four sliding strips is welded with the limiting plate of semicircular structure, the limiting plate is welded with handle.

[0013] Specific, the mounting mechanism further includes plug rod and plug hole, the bottom of the sliding block is welded with four plug rods, two fixed blocks are opposite and are provided with two groups of plug holes, the plug rod is inserted into the inside of the plug hole.

[0014] Specific, the bottom of the fixed ring is provided with a handheld mechanism, the handheld mechanism includes rotating shell, the bottom of the fixed ring is welded with the rotating shell with inverted N-shaped structure, two rotating shafts are rotatably connected to the rotating shell, a rotating block is fixedly connected between the two rotating shafts, a handle is welded to the bottom of the rotating block, the end of one of the rotating shafts is key-connected with a worm gear, the side of the fixed ring is provided with a mounting bracket, the mounting bracket is rotatably connected with a worm gear that engages with the worm gear, and the end of the worm gear is welded with an adjusting plate.

[0015] The beneficial effects of the present application are:

[0016] 1、The electric drill capable of accurately adjusting the drilling depth, the end of the shell is provided with a protection mechanism located outside the drill bit, when the operator looks up while drilling, the limiting mechanism can be released to limit the two sliding rods, at this time, the two springs are opened, the corrugated tube can be further extended, the drill bit is in contact with the drilled object, the contact ring at the end of the corrugated tube is in contact with the drilled object, forming a closed space, realizing the collection of drilling debris in the corrugated tube, effectively preventing the flying of debris in the drilling process, protecting the safety of the operator and the neatness of the surrounding environment, after drilling is completed, the inside of the corrugated tube can be cleaned, if drilling is performed on the tabletop, the two sliding rods are moved to the right, the sliding plate is inserted into the clamping groove, realizing the limiting of the sliding rod, at this time, the corrugated tube is contracted, and the drilling line of sight of the drill bit is not affected, the operation is simple.

[0017] 2. The electric drill capable of accurately adjusting the drilling depth, the shell is provided with a mounting mechanism, if the electric drill needs to be mounted on a multi-shaft driving device, the driving device selects a screw rod driving mode, the sliding block is in abutment with the two fixed blocks, the insertion rod is inserted into the inside of the insertion hole, and the two limiting plates on the same side are rotated by 90 degrees, at this time, the two limiting plates are in abutment with the fixed blocks and the sliding block respectively, a single sliding strip hooks two sliding shells simultaneously, the quick fixing of the sliding block is realized, the sliding block is further threadedly connected with the screw rod of the driving device through the screw rod groove, the limiting rod is slidably connected with the guide hole, the electric drill is quickly mounted on the driving device, the batch drilling of objects is facilitated, and the electric drill can be used only by pressing the switch, when not needed, the two limiting plates on the same side are reversed, the two sliding strips are respectively in the inside of the two sliding shells, the resetting of the two limiting plates is completed, the sliding block can be quickly removed from the fixed block, the electric drill is convenient to hold and drill, and labor is saved.

[0018] 3. The electric drill capable of accurately adjusting the drilling depth, the bottom of the fixed ring is provided with a handheld mechanism, the angle direction of the handle needs to be adjusted according to actual use requirements, if the handle needs to be adjusted on the side surface of the shell, the adjusting plate is held by hand, the adjusting plate is rotated according to the determined adjusting direction, the rotation of the adjusting plate drives the worm to rotate on the mounting frame, the rotation of the worm drives the worm wheel in meshing with the worm to rotate, so that the rotating block rotates around the axis of the rotating shaft, since the handle is welded to the bottom of the rotating block, the rotation of the rotating block drives the handle to rotate together, the angle of the handle is adjusted, the angle of the handle is quickly adjusted when the bottom space is blocked or the drilling angle needs the handle to be on the outside, drilling is facilitated, and drilling deviation caused by unstable hand holding and large vibration is avoided.

[0019] 4. The electric drill capable of accurately adjusting the drilling depth, the adjusting mechanism is mounted on the fixed ring, before drilling, the knob is loosened to enable the blocking rod to move to the right, the distance of the right movement of the blocking rod is the drilling depth, the number of the scale line exposed on the right side of the side plate can be observed, the drilling depth can be directly observed, when the object is in abutment with the end of the blocking rod during drilling, the drilling depth is quickly determined, and the structure stability of the object is affected by too deep drilling. BRIEF DESCRIPTION OF DRAWINGS

[0020] The application will be further described below in combination with the drawings and examples.

[0021] Figure 1 The overall structure schematic diagram provided by the application is shown in the figure;

[0022] Figure 2 The connection structure schematic diagram of the shell, the fixed block and the sliding block of the application is shown in the figure;

[0023] Figure 3 The connection structure schematic diagram of the fixed ring, the fixed ring and the sliding rod of the application is shown in the figure;

[0024] Figure 4 The connecting structure diagram of the slide rail, the slide plate and the spring two of the present application;

[0025] Figure 5 The connecting structure diagram of the slide rail, the slide plate and the spring two of the present application;

[0026] Figure 6 The connecting structure diagram of the mounting frame, the fixing ring and the fixing ring of the present application;

[0027] Figure 7 The connecting structure diagram of the worm wheel, the worm and the adjusting plate of the present application;

[0028] Figure 8 The connecting structure diagram of the fixed block, the sliding block and the sliding shell of the present application;

[0029] Figure 9 The connecting structure diagram of the plug rod, the plug hole and the limiting plate of the present application;

[0030] Figure 10 The connecting structure diagram of the slide shell and the limiting plate of the present application;

[0031] Figure 11 The connecting structure diagram of the inner groove, the slide strip and the limiting plate of the present application.

[0032] In the figure: 1, the shell; 2, the protection mechanism; 201, the fixing ring; 202, the bellows; 203, the abutting ring; 204, the slide rod; 205, the fixing ring; 206, the spring one; 207, the baffle; 3, the limiting mechanism; 301, the slide rail; 302, the slide plate; 303, the spring two; 304, the clamping groove; 305, the push piece; 4, the mounting mechanism; 401, the fixed block; 402, the sliding block; 403, the screw groove; 404, the guide hole; 405, the sliding shell; 406, the limiting plate; 407, the handle; 408, the slide strip; 409, the inner groove; 410, the plug rod; 411, the plug hole; 5, the adjusting mechanism; 501, the stop rod; 502, the side plate; 503, the knob; 504, the movable mouth; 505, the scale line; 6, the handheld mechanism; 601, the handle; 602, the rotating block; 603, the rotating shell; 604, the worm wheel; 605, the adjusting plate; 606, the mounting frame; 607, the worm; 608, the rotating shaft; 7, the drilling mechanism; 701, the grip; 702, the switch; 703, the drill bit; 704, the chuck; 705, the driving mechanism group. DETAILED DESCRIPTION

[0033] In order to make the technical means, the creation characteristics, the purpose and the effect of the present application easy to understand, the present application is further described below in combination with the specific embodiments.

[0034] As Figures 1-11The electric drill with adjustable drilling depth comprises a shell 1, a drilling mechanism 7 and a protection mechanism 2, wherein the protection mechanism 2 is provided with a limiting mechanism 3; the protection mechanism 2 comprises a fixed ring 201, the shell 1 is slidably connected with the fixed ring 201, the fixed ring 201 is threadedly connected with a screw which is in abutment with the surface of the shell 1, the surface of the fixed ring 201 is welded with a fixed ring 205, the side surface of the fixed ring 205 is fixedly connected with a bellows 202, the end of the bellows 202 is fixedly connected with an abutment ring 203, the side surface of the abutment ring 203 is fixedly connected with a sliding rod 204, the sliding rod 204 is fixedly connected with a baffle 207, the baffle 207 and the fixed ring 205 are clamped with a spring 206, and the sliding rod 204 and the fixed ring 205 are slidably connected; the limiting mechanism 3 comprises a sliding rail 301 and a sliding plate 302, the fixed ring 205 away from the bellows 202 is welded with the sliding rail 301, the sliding rail 301 and the fixed ring 205 are slidably connected with the sliding plate 302, and the sliding rod 204 is provided with a clamping groove 304 which is clamped with the sliding plate 302; the sliding rod 204 is symmetrically provided with two about the axis of the bellows 202, and the cross section of the two sliding rods 204 is T-shaped structure; the sliding rail 301 is oppositely provided with two about the center of the side surface of the fixed ring 205, the inner part of the two sliding rails 301 is slidably connected with the sliding plate 302, the thickness of the sliding plate 302 is equal to the thickness of the clamping groove 304, and the sliding plate 302 and the sliding rail 301 are arc-shaped structure; the limiting mechanism 3 further comprises a spring 303 and a pushing piece 305, the spring 303 is clamped between the two sliding rails 301 and the two sliding plates 302, and the opposite end of the two sliding plates 302 is fixedly connected with the pushing piece 305.When drilling holes in objects on the processing platform, connect the electric drill to the power supply, start the switch 702 to make the drill bit 703 drill holes in the object, and before drilling, the two push pieces 305 can be squeezed to make the spring 303 contract, the sliding plate 302 is separated from the surface of the sliding rod 204, and the two sliding rods 204 are further pulled to the right at the same time to avoid the corrugated pipe 202 blocking the drilling position, the clamping groove 304 on the sliding rod 204 is slid to the right side of the fixed ring 205, at this time, the squeezing of the two push pieces 305 is released, the spring 303 is opened, and the two sliding plates 302 are inserted into the inside of the clamping groove 304 to limit the sliding rod 204, avoiding the corrugated pipe 202 from blocking the view when resetting, if indoor decoration or the operator needs to look up to drill holes, such as drilling holes in the ceiling, at this time, the fixed ring 201 is slidably connected to the electric drill housing 1, ensuring that the fixed ring 201 can smoothly slide on the housing 1, and after sliding to the specified position, the screw threadedly connected to the fixed ring 201 is rotated to make the screw abut against the surface of the housing 1, achieving the positioning of the fixed ring 201 on the housing 1 and preventing it from sliding randomly, since the fixed ring 201 has the fixed ring 205 welded on the surface edge, and the corrugated pipe 202 is fixedly connected to the side surface of the fixed ring 205, when looking up to drill holes in the ceiling, the abutting ring 203 is first abutted against the object to be drilled, and the drill bit 703 is aligned with the drilling position, since the spring 206 is clamped between the baffle 207 and the fixed ring 205, under the pressure of the drill bit 703, and the deeper the drill bit 703 drills, the abutting ring 203 pushes the sliding rod 204 to move to the right, the spring 206 is compressed, and the buffering effect is achieved to reduce the impact force generated during drilling on the electric drill and the operator, and the corrugated pipe 202 has a certain flexibility and elasticity, after the abutting ring 203 contacts the surface of the object, the deeper the hole is drilled, the corrugated pipe 202 will stretch and contract with the movement of the sliding rod 204, and it is always wrapped around the drill bit 703 to form a relatively closed space, effectively preventing the debris generated during drilling from flying everywhere, protecting the safety of the operator and the cleanliness of the surrounding environment, and after drilling is completed, the debris inside the corrugated pipe 202 can be cleaned.

[0035] In particular, with reference to Figure 1 and Figure 4As shown, the fixed ring 201 is provided with an adjusting mechanism 5, which comprises a side plate 502 welded on the side surface of the fixed ring 201, a stop rod 501 slidingly connected to the side plate 502, and a knob 503 threadedly connected to the side plate 502 and abutting against the stop rod 501; the adjusting mechanism 5 further comprises a scale line 505 provided on the surface of the stop rod 501 and a movable opening 504 corresponding to the sliding rod 204 provided on the side plate 502; the cross section of the stop rod 501 is in T-shaped structure, and the side surface of the stop rod 501 is in regular hexagonal structure; the drilling mechanism 7 comprises a handle 701 connected to the shell 1, a switch 702 mounted on the handle 701, a driving mechanism group 705 mounted in the shell 1, a chuck 704 connected to the end of the driving mechanism group 705, and a drill bit 703 mounted on the chuck 704, the end of the drill bit 703 being flush with the end of the stop rod 501; before drilling, the chuck 704 is opened by a special key, the drill bit 703 is inserted into the chuck 704, and the chuck 704 is clamped by the key to complete the installation of the drill bit 703; during drilling, the power cord is connected to the external power supply, the switch 702 is pressed to drive the driving mechanism group 705 to rotate the chuck 704, and the drill bit 703 is further rotated to contact the object to complete the drilling; the depth of the drilling can be adjusted as needed during drilling; during adjustment, the knob 503 is counterclockwise rotated to separate the knob 503 from the stop rod 501 and release the fixation of the stop rod 501, so that the stop rod 501 can freely slide on the side plate 502; since the end of the stop rod 501 is flush with the end of the drill bit 703, the stop rod 501 is moved and the scale line 505 on the surface of the stop rod 501 is observed; the scale line 505 located on the right side of the side plate 502 shows the distance of the left side movement, and the distance between the end of the drill bit 703 and the end of the stop rod 501 is the depth of the drilling; the knob 503 is clockwise rotated to gradually approach and finally abut against the stop rod 501; as the knob 503 is tightened, the pressure of the knob 503 on the stop rod 501 is increased to firmly fix the stop rod 501 on the side plate 502 and prevent the stop rod 501 from moving during drilling; the depth of the drilling is the distance between the end of the drill bit 703 and the end of the stop rod 501; the switch 702 is released to stop the driving mechanism group 705 from working, the drill bit 703 is stopped from rotating, and then the drill bit 703 is slowly pulled out of the drilling hole to complete the drilling operation.

[0036] In detail, refer to Figure 1 、 Figure 2 、 Figure 8 、 Figure 9 、 Figure 10 and Figure 11As shown, the housing 1 is provided with mounting mechanism 4, mounting mechanism 4 includes fixed block 401, two fixed block 401 is welded on the housing 1, two fixed block 401 is fixedly connected by screw, two fixed block 401 on the abutment has sliding block 402, the surface center of sliding block 402 is provided with screw groove 403, two guide holes 404 are symmetrically provided on sliding block 402 about screw groove 403, the opposite side of two fixed block 401 and the two sides of sliding block 402 are fixedly connected with the sliding shell 405 of arc structure, the inside of two sliding shell 405 of the same side is provided with inner groove 409, the section of inner groove 409 is T-shaped structure, the inside of four inner grooves 409 is slidably connected with sliding strip 408, the opposite two sliding shell 405 is circular structure, the sliding strip 408 is arc structure, the inner side of four sliding strips 408 is welded with the limiting plate 406 of semicircular structure, the handle 407 is welded on the limiting plate 406; The mounting mechanism 4 further comprises plug rod 410 and plug hole 411, the bottom of sliding block 402 is rectangularly welded with four plug rods 410, two fixed block 401 is provided with two groups of plug hole 411, plug rod 410 is inserted into the inside of plug hole 411; When the handheld electric drill is used for drilling, the sliding block 402 can be not connected with the two fixed blocks 401, the weight of the overall structure is reduced, the operation is more labor-saving, if the object is drilled in batches, the electric drill can be installed on the screw rod type driving device for automatic drilling, the surface of sliding block 402 can be attached to the surface of two fixed blocks 401 during installation, so that the sliding block 402 abuts against the fixed block 401, at this time, four plug rods 410 are inserted into four plug holes 411, the preliminary positioning of sliding block 402 is completed, at this time, the horizontal part of limiting plate 406 on sliding block 402 is opposite to the horizontal part of limiting plate 406 on fixed block 401, further, the two limiting plates 406 on the same side are simultaneously rotated clockwise or counterclockwise, the rotation range is ninety degrees, the handle 407 can be held more conveniently, after the two limiting plates 406 on the same side are rotated, the two limiting plates 406 abut against the fixed block 401 and the sliding block 402 at the same time, and the two sliding strips 408 will slide into the inside of the opposite inner grooves 409, that is, a single sliding strip 408 hooks two sliding shells 405 at the same time, the close connection of the fixed block 401 and the sliding block 402 is completed, the screw rod is inserted through the screw groove 403 on the sliding block 402, the limiting rod is inserted into the inside of two guide holes 404, the connection with the driving device is completed, at this time, the electric drill is installed on the driving device, the object to be drilled is placed at the bottom of drill bit 703, and the switch 702 is pressed to cooperate with the driving device to drill, which can drill in batches, and the operation is more accurate and fast.

[0037] Specifically, refer to Figure 1 、 Figure 2 、 Figure 6 and Figure 7As shown, the bottom of the fixed ring 201 is provided with a handheld mechanism 6, which comprises a rotating shell 603, the bottom of the fixed ring 201 is welded with the rotating shell 603 in an inverted character-shaped structure, the rotating shell 603 is relatively rotatably connected with two rotating shafts 608, the two rotating shafts 608 are fixedly connected with a rotating block 602, the bottom of the rotating block 602 is welded with a handle 601, the end of one of the rotating shafts 608 is key-connected with a worm wheel 604, the side of the fixed ring 205 is provided with a mounting rack 606, the mounting rack 606 is rotatably connected with a worm 607 engaged with the worm wheel 604, the end of the worm 607 is welded with an adjusting plate 605; when drilling, one hand can hold the handle 701 and the other hand can hold the handle 601, which can be more comfortable and stable, and can avoid drilling deviation, and the angle direction of the handle 601 can be determined according to actual use requirements, for example, if the handle 601 needs to be lifted upward to obtain a more comfortable holding posture, or adjusted downward to adapt to a specific operation space, the adjusting direction is the premise of subsequent operation, if the handle 601 needs to be adjusted on the side of the shell 1, the adjusting plate 605 is held with the hand, and the adjusting plate 605 is rotated according to the determined adjusting direction, since the adjusting plate 605 and the end of the worm 607 are welded together, rotating the adjusting plate 605 will drive the worm 607 to rotate on the mounting rack 606, the rotation of the worm 607 will drive the worm wheel 604 engaged therewith to rotate, since the worm wheel 604 is key-connected to the end of one of the rotating shafts 608, the rotation of the worm wheel 604 will drive the rotating shaft 608 to rotate, the two rotating shafts 608 are fixedly connected with the rotating block 602, the rotation of one of the rotating shafts 608 will drive the other rotating shaft 608 to rotate synchronously through the rotating block 602, so as to realize the rotation of the rotating block 602 around the axis of the rotating shaft 608, since the handle 601 is welded to the bottom of the rotating block 602, the rotation of the rotating block 602 will drive the handle 601 to rotate together, so as to adjust the angle of the handle 601, which is beneficial to the adjustment of the angle of the handle 601 when the bottom space is blocked or the drilling angle needs the handle 601 to be on the outside, facilitates drilling, and avoids vibration caused by unstable holding to cause drilling deviation.

[0038] In use, first, before drilling, the chuck 704 is opened by a special key, the drill bit 703 is inserted into the inside of the chuck 704, the chuck 704 is clamped again by the key to complete the installation of the drill bit 703, during drilling, the power cord is connected with an external power supply, the switch 702 is pressed to realize that the driving mechanism group 705 drives the chuck 704 to rotate, further, the drill bit 703 rotates, the drill bit 703 is in contact with an object to complete drilling, during drilling, the depth of drilling can be adjusted as needed, during adjustment, first, the knob 503 is counterclockwise rotated, the knob 503 is separated from the stop lever 501, the fixation of the stop lever 501 is released, at this time, the stop lever 501 can slide freely on the side plate 502, since the end of the stop lever 501 is flush with the end of the drill bit 703, the stop lever 501 is moved and the scale line 505 on the surface of the stop lever 501 is observed, the scale line 505 located on the right side of the side plate 502 shows the distance of the left side movement, the distance between the end of the drill bit 703 and the end of the stop lever 501 is the depth of drilling, the knob 503 is clockwise rotated, the knob 503 gradually approaches and finally abuts against the stop lever 501, with the tightening of the knob 503, the pressure of the knob 503 on the stop lever 501 increases, the stop lever 501 is firmly fixed on the side plate 502, the movement of the stop lever 501 in the drilling process is prevented, during drilling, the object abuts against the end of the stop lever 501, which is the depth of drilling, the switch 702 is loosened, the driving mechanism group 705 stops working, the drill bit 703 stops rotating, then, the drill bit 703 is slowly pulled out of the drilling hole, the drilling operation is completed;

[0039] Then, when drilling, one hand can hold the handle 701, the other hand can hold the handle 601, it can be more comfortable, and drilling is more stable, avoiding drilling deviation, and the angle direction of the handle 601 can be determined according to actual use requirements, for example, if the handle 601 needs to be lifted upward to obtain a more comfortable holding posture, or adjusted downward to adapt to a specific operation space, the specific adjustment direction is the premise of subsequent operation, if the handle 601 needs to be adjusted on the side of the shell 1, hold the adjusting plate 605 with your hand, and rotate the adjusting plate 605 according to the determined adjustment direction, since the adjusting plate 605 and the end of the worm 607 are welded together, rotating the adjusting plate 605 will drive the worm 607 to rotate on the mounting frame 606, the rotation of the worm 607 will drive the worm gear 604 engaged with it to rotate, since the worm gear 604 is keyed to the end of one of the shafts 608, the rotation of the worm gear 604 will drive the shaft 608 to rotate, the two shafts 608 are fixedly connected with the rotating block 602, the rotation of one shaft 608 will drive the other shaft 608 to rotate synchronously through the rotating block 602, thereby realizing the rotation of the rotating block 602 around the axis of the shaft 608, since the handle 601 is welded to the bottom of the rotating block 602, the rotation of the rotating block 602 will drive the handle 601 to rotate together, achieving the purpose of adjusting the angle of the handle 601, which is beneficial to the bottom space with obstacles or the drilling angle requiring the handle 601 to be outside, quickly adjusting the angle of the handle 601, facilitating drilling, avoiding large vibration caused by unstable hand holding leading to drilling deviation;

[0040] Next, the electric drill is connected to the power supply when drilling the object on the processing platform, and the switch 702 is started to drill the object with the drill bit 703. Before drilling, the two push pieces 305 and the second spring 303 can be squeezed to shrink, the sliding plate 302 is separated from the surface of the sliding rod 204, and the two sliding rods 204 are further pulled to the right to avoid the bellow 202 from blocking the drilling position. The clamping groove 304 on the sliding rod 204 is slid to the right side of the fixed ring 205, and the two push pieces 305 are released to open the second spring 303. The two sliding plates 302 are inserted into the clamping groove 304 to limit the sliding rod 204, avoiding the bellow 202 from blocking the view. If the drilling is performed indoors or by an operator looking up, such as drilling on the ceiling, the fixed ring 201 is slidably connected to the electric drill housing 1 to ensure that the fixed ring 201 can smoothly slide on the housing 1. After sliding to the specified position, the screw threadedly connected to the fixed ring 201 is rotated to make the screw abut against the surface of the housing 1, achieving the positioning of the fixed ring 201 on the housing 1 to prevent it from sliding randomly. Since the fixed ring 201 has the fixed ring 205 welded on the surface edge, and the bellow 202 is fixedly connected to the side surface of the fixed ring 205, when drilling on the ceiling by looking up, the abutting ring 203 is abutted against the object to be drilled, and the drill bit 703 is aligned with the drilling position. Since the spring 206 is clamped between the baffle 207 and the fixed ring 205, under the pressure of the drill bit 703, and the deeper the drill bit 703 drills, the abutting ring 203 pushes the sliding rod 204 to move to the right, and the spring 206 is compressed to play a buffering role, reducing the impact force generated during drilling on the electric drill and the operator. The bellow 202 has a certain flexibility and elasticity. After the abutting ring 203 contacts the surface of the object, the hole is drilled deeper, and the bellow 202 expands and contracts with the movement of the sliding rod 204, always wrapping around the drill bit 703 to form a relatively closed space, effectively preventing the debris generated during drilling from flying everywhere, protecting the safety of the operator and the cleanliness of the surrounding environment. After drilling is completed, the debris inside the bellow 202 is cleaned.

[0041] Finally, when the handheld electric drill is used to drill holes, the sliding block 402 can be not connected with the two fixed blocks 401, so as to reduce the weight of the overall structure, and the operation is more labor-saving, if the object needs to be drilled in batches, the electric drill can be installed on the screw rod type driving device to automatically drill holes, when the electric drill is installed, the surface of the sliding block 402 can be attached to the surface of the two fixed blocks 401, so that the sliding block 402 is in abutment with the fixed blocks 401, at this time, the four inserting rods 410 are inserted into the four insertion holes 411, the preliminary positioning of the sliding block 402 is completed, at this time, the horizontal part of the limiting plate 406 on the sliding block 402 is opposite to the horizontal part of the limiting plate 406 on the fixed block 401, further, the two limiting plates 406 on the same side are simultaneously rotated clockwise or counterclockwise, the rotating range is ninety degrees, the handle 407 can be held more conveniently, when the two limiting plates 406 on the same side are rotated, the two limiting plates 406 are in abutment with the fixed blocks 401 and the sliding block 402 at the same time, and the two sliding strips 408 are simultaneously slid into the opposite inner grooves 409, that is, the single sliding strip 408 simultaneously hooks the two sliding shells 405, the close connection of the fixed blocks 401 and the sliding block 402 is completed, the screw rod is inserted through the screw rod groove 403 on the sliding block 402, the limiting rod is inserted into the two guide holes 404, and the connection with the driving device is completed, at this time, the electric drill is installed on the driving device, the object to be drilled is placed at the bottom of the drill bit 703, and the switch 702 is pressed to cooperate with the driving device to drill holes, the holes can be drilled in batches, and the operation is more accurate and fast.

[0042] It is apparent for those skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all aspects as illustrative and not restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended to embrace all changes falling within the meaning and range of equivalents of the claims. Any reference signs in the claims should not be considered as limiting the claims involved.

[0043] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. An electric drill capable of accurately adjusting the depth of a drilled hole, characterized by: Including shell (1), install on shell (1) drilling mechanism (7) and protection mechanism (2), the protection mechanism (2) is installed on the limiting mechanism (3); The protection mechanism (2) includes a fixed ring (201), the shell (1) is slidably connected with the fixed ring (201), the fixed ring (201) is threadedly connected with the surface of the shell (1) and the surface of the fixed ring (201) is welded with a fixed ring (205), the side surface of the fixed ring (205) is fixedly connected with a bellows (202), the end of the bellows (202) is fixedly connected with a contact ring (203), the side surface of the contact ring (203) is fixedly connected with a sliding rod (204), the sliding rod (204) is fixedly connected with a baffle (207), the baffle (207) and the fixed ring (205) are clamped with a spring (206), and the sliding rod (204) and the fixed ring (205) are slidably connected.The limiting mechanism (3) includes a sliding rail (301) and a sliding plate (302), the fixed ring (205) away from the side of the bellows (202) is welded with a sliding rail (301), the sliding rail (301) and the fixed ring (205) are slidably connected with a sliding plate (302), and the sliding rod (204) is provided with a clamping groove (304) matched with the sliding plate (302);The shell (1) is provided with a mounting mechanism (4), the mounting mechanism (4) includes a fixed block (401), the shell (1) is oppositely welded with two fixed blocks (401), the two fixed blocks (401) are fixedly connected by screws, the two fixed blocks (401) abut against a sliding block (402), the surface center of the sliding block (402) is provided with a screw slot (403), the sliding block (402) is symmetrically provided with two guide holes (404) about the screw slot (403), the opposite sides of the two fixed blocks (401) and the two sides of the sliding block (402) are fixedly connected with arc-shaped sliding shells (405), the interiors of the two sliding shells (405) on the same side are provided with inner grooves (409), the cross section of the inner groove (409) is T-shaped structure, the interiors of the four inner grooves (409) are slidably connected with sliding strips (408), the opposite two sliding shells (405) are circular structure, the sliding strips (408) are arc-shaped structure, the inner sides of the four sliding strips (408) are welded with semi-circular limiting plates (406), and the limiting plates (406) are welded with handles (407).

2. The electric drill with precisely adjustable drilling depth according to claim 1, characterized in that: The sliding rod (204) is symmetrically provided with two about the axis of the bellows (202), and the cross section of the two sliding rods (204) is T-shaped structure.

3. The electric drill with precisely adjustable drilling depth according to claim 1, characterized in that: The sliding rail (301) is oppositely provided with two about the side center of the fixed ring (205), and the interiors of the two sliding rails (301) are slidably connected with sliding plates (302), the thickness of the sliding plate (302) is equal to the thickness of the clamping groove (304), and the sliding plate (302) and the sliding rail (301) are arc-shaped structure.

4. The electric drill with precisely adjustable drilling depth according to claim 1, characterized in that: The limiting mechanism (3) further comprises spring two (303) and a push piece (305), and spring two (303) is clamped between the two slide rails (301) and the two slide plates (302).

5. The electric drill with precisely adjustable drilling depth according to claim 1, characterized in that: The fixing ring (201) is provided with an adjusting mechanism (5), the adjusting mechanism (5) comprises a side plate (502), the side surface of the fixing ring (201) is welded with the side plate (502), the side plate (502) is slidably connected with a stop rod (501), and the side plate (502) is threadedly connected with a knob (503) in contact with the stop rod (501).

6. The electric drill with precisely adjustable drilling depth according to claim 5, characterized in that: The adjusting mechanism (5) further comprises a scale line (505) and a movable opening (504), the surface of the stop rod (501) is provided with a scale line (505), the side plate (502) is provided with a movable opening (504) corresponding to the slide rod (204), the cross section of the stop rod (501) is a T-shaped structure, and the side surface of the stop rod (501) is a regular hexagonal structure.

7. The electric drill with precisely adjustable drilling depth according to claim 5, characterized in that: The drilling mechanism (7) comprises a handle (701), the handle (701) is connected to the shell (1), the handle (701) is provided with a switch (702), the inside of the shell (1) is provided with a driving mechanism group (705), the end of the driving mechanism group (705) is connected with a chuck (704), the chuck (704) is provided with a drill bit (703), and the end of the drill bit (703) is flush with the end of the stop rod (501).

8. The electric drill with precisely adjustable drilling depth according to claim 1, characterized in that: The mounting mechanism (4) further comprises an insertion rod (410) and an insertion hole (411), the bottom of the sliding block (402) is welded with four insertion rods (410), two groups of insertion holes (411) are oppositely formed in the two fixing blocks (401), and the insertion rod (410) is inserted into the inside of the insertion hole (411).

9. The electric drill with precisely adjustable drilling depth according to claim 1, characterized in that: The bottom of the fixing ring (201) is provided with a handheld mechanism (6), the handheld mechanism (6) comprises a rotating shell (603), the bottom of the fixing ring (201) is welded with a rotating shell (603) with an inverted U-shaped cross section, two rotating shafts (608) are rotatably connected to the rotating shell (603), a rotating block (602) is fixedly connected between the two rotating shafts (608), a handle (601) is welded to the bottom of the rotating block (602), the end of one of the rotating shafts (608) is keyed with a worm wheel (604), the side surface of the fixing ring (205) is provided with a mounting rack (606), the mounting rack (606) is rotatably connected with a worm (607) engaged with the worm wheel (604), and the end of the worm (607) is welded with an adjusting plate (605).

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