CN213701889U

CN213701889U - Hand-held electric drill

Info

Publication number: CN213701889U
Application number: CN202022440007.9U
Authority: CN
Inventors: 翁磊; 欧阳智; 何德涛
Original assignee: Zhejiang Minglei Lithium Energy Technology Co Ltd
Current assignee: Zhejiang Minglei Lithium Energy Technology Co Ltd
Priority date: 2020-10-28
Filing date: 2020-10-28
Publication date: 2021-07-16
Anticipated expiration: 2030-10-28

Abstract

The utility model relates to a hand-held type electric drill, it includes casing before the gear box of organism, fixed connection on the organism, still including rotating the gear circuit board on the casing before the gear box is located to moment cover and cover on the casing before the gear box, be equipped with the go-between of being connected with the power of organism one utmost on the gear circuit board, still be equipped with the moment adjustment piece of two at least different resistances of being connected with the power another utmost point of organism on the gear circuit board, the circumference setting of go-between is followed to the moment adjustment piece, be fixed with the conducting strip of being connected go-between and moment adjustment piece electricity on the inside wall of moment cover. This application has the biggest moment that has restricted the electric drill can produce, prevents that the work piece from twisting the flower because of the atress is too big and twisting bad or because of the atress undersize is difficult for screwing up, protects the work piece, and has improved the work efficiency's of electric drill effect.

Description

Hand-held electric drill

Technical Field

The application relates to the field of electric drills, in particular to a handheld electric drill.

Background

The electric drill is a drilling machine using electricity as power. The electric tool is a conventional product in the electric tools and is also a product of the electric tools with the largest demand. The annual production and sale quantity accounts for 35 percent of the China electric tools.

In the related technology, for example, chinese patent with publication number CN206028803U discloses a handheld two-stage speed-reducing electric drill, which comprises a switch, a motor, a fan, a casing, a middle cover fixed between the head casing and the middle cover, a motor chamber formed by the middle cover and the casing, the motor installed in the motor chamber, a closed speed-reducing box chamber formed by the middle cover and the head casing, a two-stage speed-reducing mechanism installed in the speed-reducing box chamber, the speed-reducing mechanism comprising a middle gear shaft, a first-stage gear, a second-stage gear and an output shaft, the middle gear shaft and the output shaft installed on the speed-reducing box, the first-stage gear fixed on the middle gear shaft, the second-stage gear fixed on the output shaft, the first-stage gear engaged with the. After adopting this structure, have simple structure reasonable, the transmission is steady reliable, the moment of torsion is big, the radiating effect is good, long service life's advantage such as.

For the related technologies, the inventor thinks that the output torques of the electric drills required in different use scenes are different, the electric drills increase the torques by means of the two-stage speed reducing mechanism, but the output torques are fixed, and when the torques are too large, screws and bits are easily twisted and damaged due to too large stress; when the torque is too small, the screw and the screwdriver bit are not easy to tighten, and the application range is small.

SUMMERY OF THE UTILITY MODEL

In order to improve the output torque fixation, when the torque is too large, the screw and the screwdriver bit are easy to be twisted and damaged due to too large stress; when the moment of torsion is too little, the screw is difficult to tighten with the batch head, problem that application scope is little, this application provides a hand-held type electric drill.

The application provides a hand-held type electric drill adopts following technical scheme:

the utility model provides a hand-held type electric drill, includes casing before the gear box of organism, fixed connection on the organism, still including rotating the gear circuit board of casing one side of keeping away from the organism before the gear box in the casing cover with locate the gear box before the casing, be equipped with the go-between of being connected with the power one utmost point of organism on the gear circuit board, still be equipped with two at least moment adjustment pieces of being connected with the power another utmost point of organism on the gear circuit board, at least two the circumference setting of go-between is followed to the moment adjustment piece, the moment is sheathe in and is fixed with the conducting strip that control go-between and moment adjustment piece switched on.

Through adopting above-mentioned technical scheme, the rotation moment cover, conducting strip butt in go-between and different moment adjustment piece for the moment maximum value of predetermineeing on the circuit loop is different, and moment when the electric drill on lasts to rise, when the motor drives the moment value that the drill bit produced and is greater than the maximum value, the motor will open circuit the circuit automatically, makes the electric drill stop using, has restricted the maximum moment that the electric drill can produce, has improved the suitability of electric drill output moment, and has improved the work efficiency of electric drill.

Optionally, the conductive plate includes two first fixing portions and two connecting portions, the two connecting portions are integrally disposed on the same side of the first fixing portion, and ends of the two connecting portions, which are far away from the first fixing portion, are respectively abutted to the connecting ring and the moment adjusting plate.

By adopting the technical scheme, on one hand, the connecting part is always abutted against the connecting ring and the torque adjusting sheet, so that a circuit loop always exists when the electric drill works, and the continuity of the work of limiting the maximum torque is ensured; on the other hand, the two connecting parts reduce the contact area between the connecting parts and the gear circuit board, are not easy to wear and prolong the service life of the gear circuit board.

Optionally, an abutting ring is integrally arranged on the inner side wall of the torque sleeve, and the first fixing portion is fixedly connected to the abutting ring through a bolt.

Through adopting above-mentioned technical scheme, first fixed part passes through bolted connection on the butt ring for be connected between first fixed part and the butt ring more stable, thereby make the fixed part rotate along with the rotation of moment cover, improved the regulation efficiency of moment cover.

Optionally, one side of the abutting ring, which is close to the gear circuit board, is provided with a limiting protrusion, and the first fixing portion is provided with a through hole through which the limiting protrusion penetrates.

Through adopting above-mentioned technical scheme, spacing bellied setting for fixed connection is difficult for rotating the contact failure who leads to connecting portion and go-between and moment adjustment piece in the difficult first fixed part on the butt joint ring, influences the monitoring of monitor, has improved the availability factor of conducting strip.

Optionally, one side that the gear box front shell is close to the moment cover is equipped with the projection, supply the projection to wear the locking groove of establishing on the gear circuit board.

Through adopting above-mentioned technical scheme, the locking inslot is worn to locate by the projection for the gear circuit board is back on the gear box front shell is located to the moment ways, and the gear circuit board is difficult for rotating, has improved the accuracy that the gear circuit board set up the gear.

Optionally, a limiting sheet is fixed on the gear box front shell, a limiting groove corresponding to the torque adjusting sheet one to one is formed in the torque sleeve, and one side, away from the gear box front shell, of the limiting sheet is embedded in the limiting groove.

Through adopting above-mentioned technical scheme, the flexure strip inlays and locates the spacing inslot for the moment cover is difficult for rotating under non-human effect, has improved the stability that the moment cover is located a certain gear.

Optionally, the limiting piece comprises a limiting portion and two second fixing portions, the number of the second fixing portions is two, the two second fixing portions are integrally arranged on two sides of the limiting portion, a fixing block for clamping the second fixing portions is arranged on the front shell of the gear box, and the limiting portion is embedded in the limiting groove.

Through adopting above-mentioned technical scheme, second fixed part centre gripping fixed block for the difficult follow fixed block of second fixed part breaks away from, has improved the stability of second fixed part installation.

Optionally, one side that the gearbox front shell was kept away from to the butt joint ring still is equipped with the pressure disk, one side an organic whole that the gearbox front shell is close to the moment cover is equipped with the grafting piece, the grafting piece is worn to locate on the pressure disk, one side butt of pressure disk is on the butt joint ring, an organic whole is equipped with outer lug on the circumference lateral wall of pressure disk, the butt ring is close to one side of pressure disk and is fixed with the stopper, stopper cooperation moment cover and butt ring form has the groove that slides that supplies outer lug to inlay to establish and slide.

Through adopting above-mentioned technical scheme, the grafting piece makes the pressure disk be difficult for rotating, stopper and evagination piece cooperation for moment cover pivoted angle is limited, thereby the moment cover is difficult for rotating the return circuit that causes the monitor to the one end of no moment adjustment piece and opens circuit, thereby makes maximum moment be zero, leads to the circuit to remain the state of opening circuit all the time, influences the use of electric drill, has reduced the unable possibility of using of electric drill.

Optionally, one side of the butt joint ring away from the front shell of the gear box is provided with a clamp spring, the clamp spring is in butt joint with one side of the pressure plate away from the butt joint ring, and the inserting block is provided with a clamping groove for clamping and embedding the clamp spring.

Through adopting above-mentioned technical scheme, the jump ring inlays and locates the joint inslot for the pressure disk and receive the spacing moment cover of pressure disk and be difficult for breaking away from before the gear box on the shell, stability when having improved the moment cover and rotating.

Optionally, a label for displaying the torque is arranged on one side of the torque sleeve close to the front shell of the gear box, and an arrow mark pointing to the corresponding label is arranged on the front shell of the gear box.

By adopting the technical scheme, the arrangement of the label and the arrow mark enables a user to clearly determine the position corresponding to the required torque while rotating the torque sleeve, and improves the efficiency of the user when using the electric drill.

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

1. the torque on the electric drill continuously rises, when the monitor drives the torque value generated by the drill bit to be greater than the maximum value through the monitoring motor, the monitor automatically opens the circuit, so that the electric drill stops using, the maximum torque which can be generated by the electric drill is limited, the situation that a workpiece is twisted and damaged due to overlarge stress or is not screwed easily due to undersize stress is prevented, the workpiece is protected, and the working efficiency of the electric drill is improved;

2. on one hand, the connecting part is always abutted against the connecting ring and the torque adjusting sheet, so that a circuit loop always exists when the electric drill works, and the continuity of the work of limiting the maximum torque is ensured; on the other hand, the two connecting parts reduce the contact area between the connecting parts and the gear circuit board, are not easy to wear and prolong the service life of the gear circuit board;

3. the arrangement of the label and the arrow mark enables a user to clearly determine the position corresponding to the required torque while rotating the torque sleeve, and improves the efficiency of the user when using the electric drill.

Drawings

Fig. 1 is a schematic view of a hand-held power drill according to an embodiment of the present application.

FIG. 2 is an exploded schematic view of a gearbox front casing, a gear circuit board and a torque sleeve in an embodiment of the application.

Fig. 3 is a schematic structural diagram of a shift position circuit board in the embodiment of the present application.

Fig. 4 is a schematic structural view of the torque sleeve in the embodiment of the present application.

Fig. 5 is an enlarged schematic view of a portion a in fig. 4.

FIG. 6 is a schematic structural diagram of a front shell of a gearbox in an embodiment of the present application.

Fig. 7 is an enlarged schematic view of a portion B in fig. 6.

FIG. 8 is an exploded schematic view of the gearbox front shell, the torque sleeve, the pressure plate and the clamp spring in the embodiment of the application.

FIG. 9 is a schematic structural diagram of a front shell of a gear box and a clamp spring in the embodiment of the application.

Description of reference numerals: 1. a body; 11. a gearbox front housing; 111. a limiting sheet; 1111. a limiting part; 1112. a second fixed part; 112. an insertion block; 1121. a clamping groove; 113. an arrow mark; 114. a convex column; 115. a fixed block; 12. a torque sleeve; 121. a butting ring; 1211. a limiting bulge; 122. a limiting groove; 123. a limiting block; 1231. a sliding groove; 124. labeling; 2. a gear circuit board; 21. a connecting ring; 22. a moment adjusting sheet; 23. a locking groove; 3. a conductive sheet; 31. a first fixed part; 311. perforating holes; 32. a connecting portion; 4. a platen; 41. an outer bump; 42. a limiting hole; 5. and a clamp spring.

Detailed Description

The present application is described in further detail below with reference to figures 1-9.

The embodiment of the application discloses a handheld electric drill. Referring to fig. 1, a hand held electric drill includes a body 1, a gear case front housing 11 and a torque sleeve 12. 11 fixed connection of shell before the gear box on organism 1, one side that moment cover 12 is close to shell 11 before the gear box rotates and connects in shell 11 before the gear box and lie in one side that shell 11 kept away from organism 1 before the gear box, makes things convenient for adjusting moment cover 12 to carry out the presetting of moment to the electric drill.

The side of the torque sleeve 12 close to the front gear box shell 11 is provided with a mark 124 for indicating the torque, and the front gear box shell 11 is provided with an arrow mark 113, the arrow mark 113 points to the corresponding mark 124 at the position, so that the maximum torque of the adjustment can be conveniently seen by the naked eye of a user.

Refer to fig. 2 and fig. 3, still include gear circuit board 2 and conducting strip 3, gear circuit board 2 is ring shape setting, has seted up a plurality of locking grooves 23 on the gear circuit board 2, use here to lock the groove 23 along the even setting of the circumference of gear circuit board 2 and run through the lateral wall of gear circuit board 2 as the example, one side that preceding shell 11 of gear box is close to moment cover 12 has the projection 114 that corresponds with locking groove 24, projection 114 one-to-one is pegged graft in locking groove 24 to make gear circuit board 2 be difficult for rotating.

The side of the gear circuit board 2 far away from the front shell 11 of the gear box is provided with a connecting ring 21 and a moment adjusting sheet 22. The go-between 21 links to each other with the power one utmost point of organism 1, the go-between 21 is and sets up with the gear circuit board 2 is concentric, the quantity of moment adjustment piece 22 is at least 2, the quantity of moment adjustment piece 22 corresponds the gear quantity of electric drill adjustment torque, moment adjustment piece 22 sets up along the circumference of go-between 21, the moment adjustment piece 22 that here is different can be the resistance that itself has different resistances, also can be that different moment adjustment pieces 22 establish ties and have the resistance of different resistances, go-between 21 and one of them moment adjustment piece 22 all butt on the conducting strip, make a closed circuit in moment adjustment piece 22 and go-between groove, the resistance size is controlled by the moment adjustment piece that different gears correspond in this return circuit.

Referring to fig. 4 and 5, the inner side wall of the torque sleeve 12 is provided with a butting ring 121, the butting ring 121 is perpendicular to the side wall of the torque sleeve 12, and the conductive plate 3 is fixedly connected to one side of the butting ring 121 close to the gear circuit board 2 through a bolt, so that the conductive plate 3 rotates along with the rotation of the torque sleeve.

The conducting strip 3 is an elastic strip, the conducting strip 3 includes a first fixing portion 31 and a connecting portion 32, the first fixing portion 31 is fixedly connected to the abutting ring 121, the number of the connecting portions 32 is two, the two connecting portions 32 are respectively integrally arranged on one side of the first fixing portion 31 away from the abutting ring 121, so that the connecting portion 32 compresses the gear circuit board 2 on the front shell 11 of the gear box under the action of elastic force, one of the connecting portions 32 abuts on the connecting ring 21, the other connecting portion 32 abuts on the torque adjusting piece 22 corresponding to the gear, and the connecting ring 21, the torque adjusting piece 22 and the conducting strip 3 form an electric loop.

The abutting ring 121 has a limiting protrusion 1211 on a side thereof close to the gear circuit board 2, the first fixing portion 31 is provided with a through hole 311, and the limiting protrusion 1211 is inserted into and engaged with the limiting protrusion 1211, so that the conductive plate 3 is not easy to rotate around the bolt.

Referring to fig. 4 and 7, one side of the gear box front shell 11 close to the torque sleeve 12 is fixedly connected with a limiting piece 111, the torque sleeve 12 is provided with a plurality of limiting grooves 122, the limiting grooves 122 are arranged corresponding to the torque adjusting pieces 22, and one side of the limiting piece 111 far away from the gear box front shell 11 is embedded in the limiting grooves 122, so that the torque sleeve 12 is not easy to rotate under the action of non-artificial force.

Spacing piece 111 includes spacing portion 1111 and two second fixed parts 1112, and two second fixed parts 1112 are integrative to be located the both sides of spacing portion 1111, and spacing piece 111 is the flexure strip, orders about two second fixed parts 1112 and is close to each other, is fixed with fixed block 115 on the preceding shell 11 of gear box, and the one end butt that spacing portion 1111 was kept away from to second fixed part 1112 is on fixed block 115, and two second fixed parts 1112 cooperations make spacing piece 111 be fixed in the preceding shell 11 of gear box on.

Referring to fig. 8 and 9, pressure plate 4 is still installed to one side that the gearbox front shell 11 was kept away from to butt ring 121, one side butt of pressure plate 4 is on butt ring 121, one side that gearbox front shell 11 is close to moment cover 12 has plug 112, plug 112's quantity is four, four plug 112 along the circumference setting of gearbox front shell 11, plug 112 extends behind gear circuit board 2 and the pressure plate 4 in proper order to one side that moment cover 12 kept away from gearbox front shell 11 for pressure plate 4 is difficult for rotating.

The circumference lateral wall of pressure disk 4 has an outer lug 41, and the one side that butt ring 121 is close to pressure disk 4 has stopper 123, and stopper 123 sets up and be the minor arc setting along the circumference of butt ring 121, and stopper 123 cooperation butt ring 121 is formed with the groove 1231 that slides, and outer lug 41 slides in the groove 1231 that slides, has restricted the rotation range of moment cover 12.

The clamping groove 1121 is formed in the inserting block 112, the clamp spring 5 is installed on one side, away from the gear box, of the front shell 11 of the gear box, of the abutting ring 121, the clamp spring 5 is inserted into and embedded in the clamping groove 1121, the clamp spring 5 is not embedded in the clamping groove 1121, the abutting ring 121 is abutted to one side, away from the pressing plate 4, of the part, away from the abutting ring 121, of the pressing plate 4, the torque sleeve 12 and the gear circuit board 2, and the pressing plate 4, the torque

The implementation principle of this application embodiment hand-held type electric drill does: during installation, locate gear circuit board 2 cover before the gear box on shell 11, projection 114 inserts in the locking groove 23, first fixed part 31 passes through bolt fixed connection on butt ring 121, locate gear box before the shell 11 with moment cover 12 cover, connecting portion 32 butt is on go-between 21 and moment adjustment piece 22 that current position corresponds, reference numeral 1241 on the moment cover 12 is corresponding to arrow mark 113, pass press disk 4 behind the plug block 112 butt in the one side that gear circuit board 2 was kept away from to butt ring 121, locate on plug block 112 and joint in joint groove 1121 with jump ring 5 cover.

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 hand-held type electric drill, includes casing (11) before organism (1), the gear box of fixed connection on organism (1), its characterized in that: still including rotating the gear case before connecting in the gear case shell (11) moment cover (12) of keeping away from one side of organism (1) and locating gear circuit board (2) of one side of organism (1) is kept away from in gear case shell (11), be equipped with go-between (21) of being connected with the power one utmost point of organism (1) on gear circuit board (2), still be equipped with two at least moment adjustment tabs (22) of being connected with the power another utmost point of organism (1) on gear circuit board (2), at least two the circumference setting of go-between (21) is followed in moment adjustment tab (22), be fixed with conducting strip (3) that control go-between (21) and moment adjustment tab (22) switched on moment cover (12).

2. A hand held power drill according to claim 1 wherein: the conducting strip (3) comprises a first fixing part (31) and two connecting parts (32), the number of the connecting parts (32) is two, the two connecting parts (32) are integrally arranged on the same side of the first fixing part (31), and one ends, far away from the first fixing part (31), of the two connecting parts (32) are respectively abutted to the connecting ring (21) and the moment adjusting sheet (22).

3. A hand held power drill according to claim 2 wherein: the torque sleeve is characterized in that a butting ring (121) is integrally arranged on the inner side wall of the torque sleeve (12), and the first fixing portion (31) is fixedly connected to the butting ring (121) through a bolt.

4. A hand held power drill according to claim 3 wherein: one side of the abutting ring (121) close to the gear circuit board (2) is provided with a limiting protrusion (1211), and the first fixing part (31) is provided with a penetrating hole (311) for the limiting protrusion (1211) to penetrate through.

5. A hand held power drill according to claim 1 wherein: one side that preceding shell of gear box (11) is close to moment cover (12) is equipped with projection (114), locking groove (23) that supply projection (114) to wear to establish on gear circuit board (2).

6. A hand held power drill according to claim 1 wherein: be fixed with spacing piece (111) on gear box front shell (11), be equipped with spacing groove (122) with moment adjustment sheet (22) one-to-one on moment cover (12), one side that gear box front shell (11) was kept away from in spacing groove (122) is inlayed and is located in spacing groove (111).

7. A hand held power drill according to claim 6 wherein: spacing piece (111) are including spacing portion (1111) and second fixed part (1112), the quantity of second fixed part (1112) is two, two the both sides of spacing portion (1111) are located to second fixed part (1112) an organic whole, be equipped with on gear box preceding shell (11) and supply second fixed part (1112) tight fixed block (115) of clamp, spacing portion (1111) inlay locate in spacing groove (122).

8. A hand held power drill according to claim 3 wherein: one side that gearbox front shell (11) was kept away from to butt joint ring (121) still is equipped with pressure disk (4), one side an organic whole that gearbox front shell (11) are close to moment cover (12) is equipped with plug block (112), be equipped with on pressure disk (4) and supply plug block (112) to wear to establish and fixed spacing hole (42), one side butt of pressure disk (4) is on butt joint ring (121), an organic whole is equipped with outer lug (41) on the lateral wall of pressure disk (4), one side that butt joint ring (121) are close to pressure disk (4) is fixed with spacing piece (123), spacing piece (123) cooperation moment cover (12) and butt ring (121) are formed with and supply outer lug (41) to inlay groove (1231) that slides of establishing and sliding.

9. A hand held electric drill according to claim 8 wherein: one side of the front gear box shell (11) away from the abutting ring (121) is provided with a clamp spring (5), the clamp spring (5) abuts against one side of the pressing plate (4) away from the abutting ring (121), and a clamping groove (1121) for the clamp spring (5) to be embedded is formed in the inserting block (112).

10. A hand held power drill according to claim 1 wherein: and one side of the torque sleeve (12) close to the front shell (11) of the gear box is provided with a mark (124) for indicating the torque, and the front shell (11) of the gear box is provided with an arrow mark (113) pointing to the corresponding mark (124).