CN109175466B - Electric tool - Google Patents
Electric tool Download PDFInfo
- Publication number
- CN109175466B CN109175466B CN201811401137.2A CN201811401137A CN109175466B CN 109175466 B CN109175466 B CN 109175466B CN 201811401137 A CN201811401137 A CN 201811401137A CN 109175466 B CN109175466 B CN 109175466B
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- Prior art keywords
- shell
- movable cover
- electric tool
- auxiliary
- heat dissipation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B45/00—Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor
- B23B45/02—Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor driven by electric power
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B45/00—Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor
- B23B45/001—Housing of the drill, e.g. handgrip
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B45/00—Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor
- B23B45/003—Attachments
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
- B25H1/00—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby
- B25H1/0021—Stands, supports or guiding devices for positioning portable tools or for securing them to the work
- B25H1/0078—Guiding devices for hand tools
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling And Boring (AREA)
Abstract
The invention relates to an electric tool, comprising a shell, wherein a plurality of heat dissipation holes are formed in the position, corresponding to a motor, of the shell, a movable cover matched with the rear end of the shell and the shape of a handle part is coated on the shell, the movable cover is elastically matched with the shell and can elastically move relative to the shell, auxiliary holes matched with the shapes and the number of the heat dissipation holes are formed in the movable cover, and the heat dissipation holes and the auxiliary holes are staggered from front to back in a natural state and are closed; in addition, the elastic positioning component can assist the drill bit to pre-position at a punching position, and improve the punching accuracy.
Description
Technical Field
The invention relates to the technical field of electric tools, in particular to an electric tool.
Background
The electric tool is mainly driven by the motor when in use, the motor is arranged inside the electric tool shell, the air outlet is arranged on the shell in the circumferential direction of the motor position and is mainly used for air exchange inside and outside the electric tool shell, so that heat of the electric tool when in use is dissipated to prevent the motor from being damaged due to overheating, but the structure also has certain problems, although the air outlet plays a role in heat dissipation, dust outside the shell can easily enter the shell through the air outlet, when the dust is excessively accumulated in the shell, the electric tool is easily damaged to influence the service performance of the electric tool, and the service life of the electric tool is reduced, in addition, when the electric tool is used for drilling, the drill bit is directly abutted against the drilling position, the drill bit is driven by the motor to drill, and in the drilling process, vibration can be generated due to the rotation of the drill bit, the electric tool can shake to affect the accuracy of drilling by the drill bit, and how to improve the stability of drilling by the electric tool is also a problem to be solved urgently at present.
Disclosure of Invention
In view of the current situation of the prior art, the technical problem to be solved by the present invention is to provide an electric tool that can not only dissipate heat but also prevent dust, but also assist a drill bit to stably punch.
The technical scheme adopted by the invention for solving the technical problems is as follows: an electric tool comprises a shell, wherein a motor is arranged in the shell, a drill bit is arranged at the front end of the shell, a plurality of heat dissipation holes are formed in the position, corresponding to the motor, of the shell, the shell is wrapped with a movable cover matched with the rear end of the shell and the shape of a handle, the movable cover is elastically matched with the shell and can elastically move relative to the shell, auxiliary holes matched with the heat dissipation holes in shape and number are formed in the movable cover, the heat dissipation holes and the auxiliary holes are staggered from front to back in a natural state, and the heat dissipation holes are closed; in a use state, the heat dissipation hole is communicated with the auxiliary hole to exchange air inside and outside the shell for heat dissipation, the elastic positioning assembly is arranged at the front end of the shell under the drill bit, a sliding groove used for containing the elastic positioning assembly is formed in the shell along the length direction of the shell, and a dustproof mesh cover is arranged on the movable cover at a position corresponding to the auxiliary hole.
Furthermore, a clamping groove is convexly formed in the front end of the auxiliary hole in the outer wall of the movable cover, an external thread is arranged at the rear end of the auxiliary hole in the outer wall of the movable cover, one end of the dustproof net cover is matched with the clamping groove, and an internal thread matched with the external thread is arranged at the other end of the dustproof net cover.
Further, the elastic positioning assembly comprises a positioning rod and an auxiliary spring, a convex ring extending outwards is arranged on the positioning rod, one end of the auxiliary spring is sleeved on the positioning rod and is tightly abutted to the convex ring, and the other end of the auxiliary spring is tightly abutted to the bottom of the sliding groove.
Further, the outer wall of bulge loop and the inner wall clearance fit of spout, the external diameter of this bulge loop is greater than the internal diameter of spout opening part, outside the spout was arranged in to the head of locating lever exposure, the head cladding of this locating lever has the rubber sleeve, and the length that this locating lever exposure was arranged outside the spout is greater than the length of drill bit.
Furthermore, a connecting column is convexly arranged at the center of the rear end of the shell, a connecting hole for the connecting column to penetrate through is formed in the movable cover, the end part of the connecting column penetrates through the connecting hole and is exposed outside the movable cover, an adjusting nut used for limiting the movable cover is screwed on the end part of the connecting column, the connecting column comprises a smooth section and a threaded section matched with the adjusting nut, and the inner wall of the connecting hole is smoothly arranged.
Furthermore, at least two first mounting grooves are convexly arranged at the rear end of the shell, second mounting grooves corresponding to the first mounting grooves in number and position are convexly arranged in the movable cover, and springs are clamped between the first mounting grooves and the second mounting grooves.
Furthermore, a first salient point of a positioning spring is arranged in the first mounting groove, and a second salient point of the positioning spring is arranged in the second mounting groove.
Furthermore, a through hole penetrating through the movable cover is formed in the second salient point.
Furthermore, an arc hole penetrating through the movable cover is formed in the bottom of the second mounting groove in the circumferential direction of the second salient point.
Furthermore, the lower end of the movable cover is hinged with a guide rod, the lower end of the handle part of the shell extends to form a guide groove matched with the guide rod, and a roller is arranged at the contact end of the guide rod and the guide groove.
Compared with the prior art, the invention has the advantages that: according to the invention, the movable cover matched with the shapes of the rear end of the shell and the handle part is arranged, when the electric tool is used, the movable cover can be pushed towards the head direction of the electric tool by holding the handle part by a user, so that the auxiliary hole on the movable cover is communicated with the heat dissipation hole on the shell, and the heat dissipation is realized; when the tool is not used, the movable cover elastically resets to ensure that the auxiliary hole on the movable cover is staggered with the heat dissipation hole, the movable cover closes the heat dissipation hole, and the shell closes the auxiliary hole, thereby preventing dust from entering the shell and prolonging the service life of the electric tool, the design of the movable cover can drive through the holding action of the handle part, the error of forgetting to open the heat dissipation hole when the electric tool works can not occur, and the movable cover can automatically close the heat dissipation hole through elastic reset when not used, thereby playing a dustproof role, not only no additional operation steps are added, but also the use is simple and convenient, and the error of forgetting to open or close the heat dissipation hole can not occur, in addition, the arrangement of the elastic positioning component can assist the drill bit to carry out pre-positioning at the punching position and pre-position on the wall body, thereby improving the punching accuracy, and the drill bit can stretch, along with the drill bit stretches into the wall body, the elastic positioning subassembly compresses to spout bottom direction, and the auxiliary drill bit location is punched and is not influenced the drill bit and stretch into the wall body and punch all the time, moreover, through set up dustproof screen panel on the movable cover, when the auxiliary hole on the movable cover and the louvre intercommunication heat dissipation on the casing, dustproof screen panel can play dustproof effect, prevents that there is the dust to get into the casing in the electric tool uses, makes electric tool can both be dustproof in work and non-work, prolongs its life.
Drawings
FIG. 1 is a schematic view of the structure of the present invention in its natural state;
FIG. 2 is a schematic structural view of the present invention in an operating state;
FIG. 3 is a rear view of the removable cover of the present invention;
FIG. 4 is a schematic view of the guide bar of the present invention in an installed condition;
FIG. 5 is a schematic view of a dust guard according to the present invention;
as shown in the figure, 1 casing, 2 louvres, 3 movable covers, 4 auxiliary holes, 5 spliced poles, 6 connecting holes, 7 adjusting nuts, 8 first mounting grooves, 9 second mounting grooves, 10 springs, 11 through holes, 12 arc holes, 13 guide rods, 14 guide grooves, 15 rollers, 16 check blocks, 17 handle parts, 18 drill bits, 19 sliding grooves, 20 positioning rods, 21 auxiliary springs, 22 convex rings, 23 rubber sleeves, 24 dustproof mesh enclosures, 25 clamping grooves and 26 sealing gaskets.
Detailed Description
As shown in fig. 1-5, an electric tool includes a housing 1, a motor is disposed in the housing 1, a drill 18 is disposed at the front end of the housing 1, a plurality of heat dissipation holes 2 are formed at positions corresponding to the motor on the housing 1, a movable cover 3 having a shape matching with the rear end of the housing 1 and a handle portion 17 is coated on the housing 1, the movable cover 3 is elastically matched with the housing 1 and can elastically move relative to the housing 1, auxiliary holes 4 having a shape and number matching with the heat dissipation holes 2 are formed on the movable cover 3, the heat dissipation holes 2 and the auxiliary holes 4 are staggered from front to back in a natural state, and the heat dissipation holes 2 are closed; in a use state, the heat dissipation hole 2 is communicated with the auxiliary hole 4 to exchange and dissipate heat of air inside and outside the shell 1, an elastic positioning component is arranged at the front end of the shell 1 under the drill bit 18, a sliding groove 19 for containing the elastic positioning component is formed in the shell 1 along the length direction of the shell 1, and a dustproof mesh enclosure 24 is arranged on the movable cover 3 at a position corresponding to the auxiliary hole 4.
According to the invention, the movable cover 3 matched with the rear end of the shell 1 and the handle part 17 in shape is arranged, when the electric tool is used, the movable cover 3 can be pushed towards the head direction of the electric tool by holding the handle part 17 with a user, so that the auxiliary holes 4 on the movable cover 3 are communicated with the heat dissipation holes 2 on the shell 1, and heat dissipation is realized; when the electric tool is not used, the movable cover 3 is elastically reset, so that the auxiliary hole 4 on the movable cover 3 is staggered with the heat dissipation hole 2, the heat dissipation hole 2 is closed by the movable cover 3, the auxiliary hole 4 is closed by the shell 1, thereby preventing dust from entering the shell 1, prolonging the service life of the electric tool, the movable cover 3 is designed, the error of forgetting to open the heat dissipation hole 2 when the electric tool works can not occur through the holding action drive of the handle part 17, the movable cover 3 can automatically close the heat dissipation hole 2 through elastic reset when not used, thereby playing a dustproof role, not only adding additional operation steps, but also having simple and convenient use, and avoiding the error of forgetting to open or close the heat dissipation hole 2, in addition, the distance L from the rear side surface of the handle part 17 to the inner side surface of the movable cover 3 is the displacement of the elastic movement of the movable cover 3, when the common electric tool is used, the operator, the invention adopts the movable cover 3 matched with the shape of the rear end of the shell 1 and the handle part 17, so that an operator can drive the movable cover 3 to push towards the head of the electric tool according to the original operation action when using the electric tool, so that the auxiliary hole 4 on the movable cover 3 is communicated with the heat dissipation hole 2 on the shell 1, heat dissipation is realized, when the operator looses the hand, the electric tool stops working, the movable cover 3 elastically resets to close the heat dissipation hole 4, and a dustproof effect is realized, the invention realizes the functions of heat dissipation and dust prevention of the electric tool under the condition of not increasing additional operation, the operation is simple and convenient, in addition, the arrangement of the elastic positioning component can assist the drill bit 18 to carry out prepositioning at a punching position and is positioned on the wall in advance, the punching accuracy is improved, and the drill bit 18 can extend into the wall when punching, the elastic positioning component can elastically contract and can extend into the, elastic locating component compresses to 19 bottom directions of spout, 18 location of auxiliary bit are punched all the time and do not influence the drill bit 18 and bore into the wall body and punch, moreover, through set up dustproof screen panel 24 on the movable cover 3, when auxiliary hole 4 on the movable cover 3 and 2 intercommunication heat dissipations of louvre on the casing 1, dustproof screen panel 24 can play dustproof effect, prevent that there is the dust to get into casing 1 in the electric tool uses, make electric tool can both be dustproof in work and non-work, prolong its life.
As preferred, protruding draw-in groove 25 that is equipped with in the front end department of auxiliary hole 4 on the outer wall of movable cover 3, be equipped with the external screw thread in the rear end department of auxiliary hole 4 on the outer wall of this movable cover 3, the one end and the draw-in groove 25 cooperation of dustproof screen panel 24, the other end be equipped with external screw thread fit's internal thread, dustproof screen panel 24 can dismantle with movable cover 3 through screw thread fit and be connected, conveniently dismantle the washing, change dustproof screen panel 24, in addition, the one end of dustproof screen panel 24 is pegged graft with draw-in groove 25 on the movable cover 3, the other end and the 3 threaded connection of movable cover, guarantee that the dust is difficult for getting into casing 1 from the both ends junction of.
Preferably, a sealing washer 26 is arranged at the matching position of the dust-proof mesh enclosure 24 and the clamping groove 25, so that dust is prevented from entering the shell 1 from the connecting gap, and the dust-proof effect is further improved.
Preferably, the elastic positioning assembly comprises a positioning rod 20 and an auxiliary spring 21, a convex ring 22 extending outwards is arranged on the positioning rod 20, one end of the auxiliary spring 21 is sleeved on the positioning rod 20 and tightly abutted to the convex ring 22, the other end of the auxiliary spring 21 is tightly abutted to the bottom of the sliding groove 19, the positioning rod 20 is matched with the auxiliary spring 21, so that the positioning rod 20 can elastically slide in the sliding groove 19, in a natural state, the auxiliary spring 21 tightly abuts against the opening of the positioning rod 20 to the sliding groove 19, when the drill bit 18 works and drills into the wall body to drill, the positioning rod 20 abuts against the wall body and is pushed by an operator to the direction of the wall body, the positioning rod 20 extrudes the auxiliary spring 21 to retract into the sliding groove 19, the elastic telescopic auxiliary drill bit 18 drills, and the stability and accuracy of the drill bit 18 in.
Preferably, the outer wall of the convex ring 22 is in clearance fit with the inner wall of the sliding groove 19, the positioning rod 20 can be prevented from moving in the circumferential direction when sliding in the sliding groove 19, the stability is improved, the outer diameter of the convex ring 22 is larger than the inner diameter of the opening of the sliding groove 19, the positioning rod 20 can be prevented from popping out of the sliding groove 19 and playing a limiting role, the head of the positioning rod 20 is exposed out of the sliding groove 19, the head of the positioning rod 20 is wrapped by a rubber sleeve 23, the anti-sliding effect can be achieved when the positioning rod 20 is pre-positioned on the wall, the length of the positioning rod 20 exposed out of the sliding groove 19 is larger than the length of the drill bit 18, the positioning rod 20 can be pre-positioned on the wall preferentially, then the electric tool is pushed forwards, the drill bit 18 is abutted to the drilling position, the.
Preferably, a connecting column 5 is convexly arranged at the center of the rear end of the shell 1, a connecting hole 6 for the connecting column 5 to penetrate through is formed in the movable cover 3, the end of the connecting column 5 penetrates through the connecting hole 6 and is exposed outside the movable cover 3, an adjusting nut 7 for limiting the movable cover 3 is screwed at the end of the connecting column 5, the distance between the movable cover 3 and the shell 1 can be adjusted through the adjusting nut 7, namely the elastic resetting distance of the movable cover 3, the adjusting nut 7 is further used for limiting the movable cover 3 to be separated from the shell 1, and when the movable cover 3 is elastically reset, the adjusting nut 7 plays a role in stopping and limiting.
Preferably, the connecting column 5 comprises a smooth section and a thread section matched with the adjusting nut 7, the inner wall of the connecting hole 6 is smoothly arranged, and the connecting column 5 is divided into the smooth section and the thread section, so that the connecting column 5 is matched with the connecting hole 6 with the smooth inner wall on the one hand, the movable cover 3 can smoothly slide along the connecting column 5, the heat dissipation holes 2 are opened and closed, and the movable cover 3 is matched with the adjusting nut 7 on the other hand to adjust the installation position of the movable cover 3.
As preferred, the protruding at least two first mounting grooves 8 that are equipped with of 1 rear end of casing, protruding second mounting groove 9 corresponding with first mounting groove 8 quantity and position that is equipped with in the activity cover 3, the joint has spring 10 between first mounting groove 8 and the second mounting groove 9 for keep elastic fit between activity cover 3 and the casing 1, under no exogenic action, spring 10 resets and can pull open the distance between activity cover 3 and the casing 1, thereby close louvre 2, play dustproof effect, and first mounting groove 8, setting up of second mounting groove 9 can play limiting displacement to spring 10, prevent that spring 10 from shifting, influence the reseing of activity cover 3.
Preferably, a first salient point of a positioning spring 10 is arranged in the first mounting groove 8, a second salient point of the positioning spring 10 is arranged in the second mounting groove 9, and the first salient point and the second salient point are convenient for mounting the spring 10.
Preferably, be equipped with the through-hole 11 that runs through movable cover 3 on the second bump, thereby the setting of this through-hole 11 can supply thin iron wire to penetrate when installing spring 10 and pack into second mounting groove 9 to auxiliary spring 10, because when movable cover 3 cup jointed with casing 1, inside spring 10 is blind dress, takes place the installation dislocation easily, and the thin iron wire can be inserted in advance in the setting of this through-hole 11 and the spring 10 is worn on thin iron wire, plays the direction auxiliary action during the installation, improves the installation effectiveness.
Preferably, the bottom of the second mounting groove 9 is provided with an arc hole 12 penetrating through the movable cover 3 in the circumferential direction of the second salient point, the arc hole 12 may be two half arc holes, three third arc holes, or four quarter arc holes, the arrangement of the arc hole 12 may be used to observe the mounting condition of the inner spring 10, and if the spring 10 is not mounted in place, the inner spring needs to be mounted again.
Preferably, the lower end of the movable cover 3 is hinged with a guide rod 13, the lower end of the handle portion 17 of the housing 1 extends to form a guide groove 14 matched with the guide rod 13, a roller 15 is arranged at the end, contacted with the guide groove 14, of the guide rod 13, the guide rod 13 is matched with the guide groove 14, a guide auxiliary effect is achieved when the movable cover 3 slides, the roller 15 can reduce friction between the guide rod 13 and the guide groove 14, so that the movable cover 3 can slide smoothly, in addition, the guide groove 14 achieves a limiting effect on the guide rod 13 and limits the movable cover 3 together with the adjusting nut 7, the movable cover 3 is prevented from being separated from the housing 1 when the movable cover 3 elastically resets, and the two are matched and limited more stably.
Preferably, a stopper 16 for limiting the rotation of the guide rod 13 extends from the lower end of the movable cover 3, the lower edge of the stopper 16 is flush with the upper edge of the guide groove 14, so that when the movable cover 3 is installed, the lower end of the movable cover 3 can slide into the range of the guide groove 14 without hindrance, and the stopper 16 is arranged to limit the rotation of the guide rod 13 towards the head of the electric tool, so that the lower end of the guide rod 13 is kept in contact with the bottom surface of the guide groove 14 when the movable cover 3 slides.
Preferably, the upper edge of the guide groove 14 is provided with a circular arc guide angle, so that the guide rod 13 is guided into the guide groove 14 conveniently and is prevented from being scratched.
When the electric tool is used, the head of the positioning rod 20 is abutted against a wall body, then the electric tool is pushed towards the direction of the wall body until the drill bit 18 is abutted against a punching position, the drill bit 18 is driven by the motor to punch holes, the positioning rod 20 is extruded by the wall surface along with the fact that the drill bit 18 extends into the wall body, the auxiliary spring 21 is extruded by the positioning rod 20 and retracts towards the chute 19, the positioning rod 20 elastically contracts and always assists the drill bit 18 to perform positioning punching without influencing the fact that the drill bit 18 extends into the wall body to perform punching, the accuracy and the stability of punching are improved, after punching is finished, the positioning rod 20 resets under the action of the auxiliary spring 21 after the drill bit 18 is separated from the wall body, in addition, when the electric tool works, an operator holds the handle 17 of the electric tool, and simultaneously holds the lower part of the movable cover 3 and drives the movable cover 3 to slide towards the direction of the head of the, when the electric tool is not used, the handle part 17 is loosened by the hand of an operator, under the condition of no external force, the movable cover 3 is reset through the spring 10, the rear end of the movable cover 3 is abutted against the adjusting nut 7, the guide rod 13 at the lower end of the movable cover 3 is abutted against the wall of the guide groove 14, the auxiliary hole 4 on the movable cover 3 is staggered with the heat dissipation hole 2, the heat dissipation hole 2 is closed by the movable cover 3, the auxiliary hole 4 is closed by the shell 1, so that dust is prevented from entering the shell 1, the service life of the electric tool is prolonged, the dust-proof net cover 24 on the movable cover 3 can filter air entering the shell 1 when the electric tool works and does not work, the dust is prevented from entering the shell 1, the dust-proof effect is further improved, when the electric tool is not used, the dust-proof net cover 24 can be screwed down for cleaning and replacing, the use is convenient, in addition, when the movable cover 3 is installed, the, guide rod 13 of 3 lower extremes of movable cover turns to horizontal position to electric tool rear portion direction, then promotes movable cover 3 and moves to electric tool head direction for 3 lower extremes of movable cover slide to 14 regional tops of guide slot, to the whole guide slot 14 regions of sliding into of guide rod 13, guide rod 13 rotates vertical position under the action of gravity, then cancel thrust, movable cover 3 moves to electric tool rear portion direction, offsets to guide rod 13 and 14 walls of guide slot, accomplish the installation, the installation is simple, need not with the help of appurtenance.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in the embodiments and modifications thereof may be made, and equivalents may be substituted for elements thereof; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. An electric tool comprises a shell (1), wherein a motor is arranged in the shell (1), a drill bit (18) is arranged at the front end of the shell (1), and the electric tool is characterized in that a plurality of heat dissipation holes (2) are formed in the position, corresponding to the motor, of the shell (1), a movable cover (3) matched with the shape of the rear end of the shell (1) and the shape of a handle part (17) is coated on the shell (1), the movable cover (3) is elastically matched with the shell (1) and can elastically move relative to the shell (1), auxiliary holes (4) matched with the shape and the number of the heat dissipation holes (2) are formed in the movable cover (3), the heat dissipation holes (2) and the auxiliary holes (4) are staggered in the front and back directions in a natural state, and the heat dissipation holes (2) are closed; in a use state, the heat dissipation hole (2) is communicated with the auxiliary hole (4) to exchange and dissipate heat of air inside and outside the shell (1), an elastic positioning assembly is arranged at the front end of the shell (1) under the drill bit (18), a sliding groove (19) used for containing the elastic positioning assembly is formed in the shell (1) along the length direction of the shell (1), a dustproof mesh cover (24) is arranged at the position, corresponding to the auxiliary hole (4), on the movable cover (3), the elastic positioning assembly comprises a positioning rod (20) and an auxiliary spring (21), a convex ring (22) extending outwards is arranged on the positioning rod (20), one end of the auxiliary spring (21) is sleeved on the positioning rod (20) and is abutted against the convex ring (22), the other end of the auxiliary spring (21) is abutted against the bottom of the sliding groove (19), a convex connection column (5) is arranged at the center of the rear end of the shell (1), it has connecting hole (6) that supplies spliced pole (5) to pass to open on activity cover (3), spliced pole (5) tip passes connecting hole (6) and exposes and arranges activity cover (3) outside in, and this spliced pole (5) tip is twisted has adjusting nut (7) that are used for spacing activity cover (3), spliced pole (5) including smooth section and with adjusting nut (7) complex screw thread section, the inner wall of connecting hole (6) sets up smoothly, the lower extreme of activity cover (3) articulates there is guide arm (13), casing (1) extend at the lower extreme of handle portion (17) have with guide arm (13) complex guide slot (14), be equipped with gyro wheel (15) with guide slot (14) contact jaw on guide arm (13).
2. The electric tool according to claim 1, wherein the outer wall of the movable cover (3) is provided with a clamping groove (25) protruding from the front end of the auxiliary hole (4), the outer wall of the movable cover (3) is provided with an external thread at the rear end of the auxiliary hole (4), one end of the dust screen (24) is matched with the clamping groove (25), and the other end of the dust screen is provided with an internal thread matched with the external thread.
3. The electric tool according to claim 1, wherein the outer wall of the convex ring (22) is in clearance fit with the inner wall of the sliding groove (19), the outer diameter of the convex ring (22) is larger than the inner diameter of the opening of the sliding groove (19), the head of the positioning rod (20) is exposed out of the sliding groove (19), the head of the positioning rod (20) is coated with a rubber sleeve (23), and the length of the positioning rod (20) exposed out of the sliding groove (19) is larger than that of the drill bit (18).
4. The electric tool according to claim 1, wherein at least two first mounting grooves (8) are convexly arranged at the rear end of the housing (1), second mounting grooves (9) corresponding to the number and the positions of the first mounting grooves (8) are convexly arranged in the movable cover (3), and a spring (10) is clamped between the first mounting grooves (8) and the second mounting grooves (9).
5. A power tool according to claim 4, characterized in that a first protruding point of the positioning spring (10) is arranged in the first mounting groove (8), and a second protruding point of the positioning spring (10) is arranged in the second mounting groove (9).
6. A power tool according to claim 5, characterized in that the second protruding point is provided with a through hole (11) extending through the movable cover (3).
7. An electric tool according to claim 5, characterized in that the bottom of the second mounting groove (9) is provided with a circular arc hole (12) penetrating the movable cover (3) in the circumferential direction of the second salient point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811401137.2A CN109175466B (en) | 2018-11-22 | 2018-11-22 | Electric tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811401137.2A CN109175466B (en) | 2018-11-22 | 2018-11-22 | Electric tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109175466A CN109175466A (en) | 2019-01-11 |
| CN109175466B true CN109175466B (en) | 2021-05-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811401137.2A Active CN109175466B (en) | 2018-11-22 | 2018-11-22 | Electric tool |
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| CN (1) | CN109175466B (en) |
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| CN112633033A (en) * | 2020-12-07 | 2021-04-09 | 杭州土垚科技有限公司 | College enrollment intention analyzer and analysis method based on Internet of things |
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| CN206122745U (en) * | 2016-10-13 | 2017-04-26 | 天津智目科技发展有限公司 | But dedicated ash blocking dirt of finishing work just can jar -proof electric drill |
| CN207071700U (en) * | 2017-07-26 | 2018-03-06 | 江苏卓达信息科技有限公司 | One kind can ranging hand-held drilling machine |
| CN207447414U (en) * | 2017-09-25 | 2018-06-05 | 新乡市职业教育中心 | A kind of high stability drilling machine |
| CN207824819U (en) * | 2017-12-25 | 2018-09-07 | 卓成建设集团有限公司 | A kind of electric drill for building |
| CN108415524B (en) * | 2018-03-15 | 2020-08-04 | 重庆熊猫快收供应链管理有限公司 | Computer machine case that can in time dispel heat and remove dust |
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