CN219304567U

CN219304567U - Driving device structure and electric tool using same

Info

Publication number: CN219304567U
Application number: CN202223420772.XU
Authority: CN
Inventors: 施照军; 刘杰
Original assignee: Dongguan Lichen Electromechanical Technology Co ltd
Current assignee: Dongguan Lichen Electromechanical Technology Co ltd
Priority date: 2022-12-16
Filing date: 2022-12-16
Publication date: 2023-07-04
Anticipated expiration: 2032-12-16

Abstract

The utility model discloses a driving device structure and an electric tool using the driving device, which comprises: the coil winding device comprises a conductive terminal, a wire frame integrally formed with the conductive terminals, a plurality of coils wound on the wire frame and connected with one end of the conductive terminal, and a control circuit board arranged at one end of the wire frame and used for the other end of the conductive terminal to pass through, wherein the circumferences of the conductive terminals are positioned on the side wall of the wire frame, and one end of the conductive terminal positioned on the side wall of the wire frame is connected with the coils. Adopt with conductive terminal integrated into one piece on the lateral wall of line frame to pass control circuit board with conductive terminal's one end, make tip winding to conductive terminal one end on the line frame lateral wall behind winding the line frame through with the coil, utilize conductive terminal to pass control circuit board and weld with it, and then shorten drive arrangement's axial length, make the structure compacter, reduce drive arrangement's volume, make drive arrangement can use on the product of installation space littleer, be favorable to reducing volume and the axial length of using the product.

Description

Driving device structure and electric tool using same

Technical field:

the utility model relates to the technical field of driving devices, in particular to a driving device structure and an electric tool using the driving device.

The background technology is as follows:

the driving device is usually a motor or a motor, and after a coil of the conventional driving device is wound on a winding frame, a connecting terminal is formed by winding one end of the winding frame, so that the length of a stator is increased, the size of the driving device is increased, and the structure is not compact enough. When the driving device is applied, a relatively large installation space is required to be reserved for the applied product, so that the volume of the product becomes huge, and the use is inconvenient.

In view of this, the present inventors have proposed the following means.

The utility model comprises the following steps:

the utility model aims to overcome the defects of the prior art and provides a driving device structure and an electric tool using the driving device.

In order to solve the technical problems, the utility model adopts the following first technical scheme: a driving device structure and an electric tool using the driving device are provided, which comprises: the coil is arranged on the coil frame and connected with one end of the conductive terminal, and the control circuit board is arranged at one end of the coil frame and used for the other end of the conductive terminal to pass through.

Furthermore, in the above technical scheme, the conductive terminal is integrally injection-molded with bakelite, the bakelite is integrally injection-molded with the wire frame into a whole after being integrally injection-molded on the conductive terminal, and one end of the conductive terminal is fixedly connected with one end of the coil through welding.

In the above technical solution, one end of the conductive terminal is bent to form a winding hook portion for winding the coil, and the other side of the conductive terminal axially passes through the control circuit board; an insulating heat conducting pad is arranged between the control circuit board and the wire frame to separate the control circuit board from the wire frame.

In the above technical scheme, the wire frame includes a metal frame body and a plastic body which is injection molded outside the metal frame body and is integrally molded with the bakelite and the conductive terminal, the control circuit board is mounted at one end of the plastic body through a first screw, a heat sink is arranged between the control circuit board and the plastic body to separate, and the insulating heat conducting pad is positioned between the heat sink and the control circuit board; the other end of the plastic body is also provided with a Hall plate, and three conductive terminals and bakelite are integrally formed on the outer wall of the plastic body.

In order to solve the technical problems, the utility model adopts the following second technical scheme: an electric tool, characterized in that: the driving device comprises the driving device, a shell and a rear cover, wherein the shell is used for installing the driving device, the driving device further comprises an output rotor arranged in the wire frame, and a first bearing and a second bearing which are arranged on the shell and the rear cover are respectively installed at two ends of the output rotor.

Furthermore, in the above technical scheme, a mounting hole site for mounting the second bearing is arranged on the inner side of the central hole of the rear cover, a clamping groove for limiting the second bearing through a second clamping spring is arranged in the mounting hole site, and the inner wall of one side of the clamping groove is an inclined plane.

Further, in the above technical solution, a fastener for installing the second bearing is provided at the center hole of the rear cover.

In the above technical scheme, the fastener is an insert integrally formed in the rear cover, one end of the insert is formed with a first shaft hole shoulder for limiting the second bearing, and the other end of the insert is limited to the second bearing through a first clamp spring.

Furthermore, in the above technical scheme, the first jump ring is the first jump ring of tapering, the other end shaping of mold insert has the mounting groove that is used for installing the first jump ring, and the one side inner wall of this mounting groove is the inclined plane.

Further, in the above technical solution, the fastener is a limit stop for limiting the second bearing on the rear cover, and the limit stop is connected and fixed with the rear cover by a screw, and clamps the second bearing in the middle.

By adopting the technical scheme, compared with the prior art, the utility model has the following beneficial effects:

1. according to the utility model, the conductive terminal is integrally formed on the side wall of the wire frame, one end of the conductive terminal penetrates through the control circuit board, the end part of the coil is wound on one end of the conductive terminal on the side wall of the wire frame after being wound on the wire frame, and the conductive terminal penetrates through the control circuit board to be welded with the conductive terminal, so that the axial length of the driving device is shortened, the structure is more compact, the volume of the driving device is reduced, the driving device can be used on products with smaller installation space, and the volume and the axial length of the applied products are reduced.

2. The bakelite used for welding is formed at one end of the conductive terminal in an integral injection molding mode, so that the coil is fixedly connected with the conductive terminal in a butt-joint mode after the end part of the coil is wound on the conductive terminal, the coil is connected with the conductive terminal stably, and the service life of the driving device is prolonged. Secondly, adopt to buckle at conductive terminal's tip and form the wire winding hook portion that stretches out the bakelite outside, through the tip of winding on this wire winding hook portion, the mode of rethread butt-joint is fixed coil tip and wire winding hook portion to further promote the stability that coil and conductive terminal are connected, prevent that drive arrangement from welding loose and leading to coil and conductive terminal to break away from after long-term use.

Description of the drawings:

FIG. 1 is a cross-sectional view of a drive device of the present utility model;

FIG. 2 is an exploded view of a wire frame in the present utility model;

FIG. 3 is a perspective view of a wire frame in the present utility model;

FIG. 4 is a perspective view of a drive device according to the present utility model;

FIG. 5 is a cross-sectional view of the power tool of the present utility model;

FIG. 6 is a cross-sectional view of an insert construction of the present utility model;

fig. 7 is a cross-sectional view of the limit stop of the present utility model.

FIG. 8 is an exploded view of an assembly of the insert structure of the present utility model;

FIG. 9 is an exploded view of the assembly of the limit stop of the present utility model;

FIG. 10 is a cross-sectional view of a Hall plate-carrying power tool of the present utility model;

fig. 11 is a cross-sectional view of a hall plate-carrying drive of the present utility model.

The specific embodiment is as follows:

the utility model will be further described with reference to specific examples and figures.

Referring to fig. 1 to 3, there is shown a driving device structure, which includes: the coil winding device comprises a conductive terminal 1, a plurality of wire frames 3 integrally formed with the conductive terminal 1, a plurality of coils 4 wound on the wire frames 3 and connected with one end of the conductive terminal 1, and a control circuit board 5 arranged at one end of the wire frames 3 and used for the other end of the conductive terminal 1 to pass through, wherein the plurality of conductive terminals 1 are circumferentially arranged on the side wall of the wire frames 3, and one ends of the conductive terminals 1 arranged on the side wall of the wire frames 3 are connected with the coils 4. Adopt with conductive terminal 1 integrated into one piece on the lateral wall of line frame 3 to pass control circuit board 5 with conductive terminal 1's one end, make the tip coil to the conductive terminal 1 one end on the lateral wall of line frame 3 after twining coil 4 on line frame 3, utilize conductive terminal 1 to pass control circuit board 5 and weld with it, and then shorten drive arrangement's axial length, make the structure compacter, reduce drive arrangement's volume, make drive arrangement can use on the product of installation space littleer, be favorable to reducing volume and the axial length of using the product. Meanwhile, the automatic production is more convenient, and the production efficiency is improved.

The wire frame 3 is characterized in that the wire frame 4 is integrally injection molded with the wire frame 2 after the wire frame 2 is integrally injection molded with the wire frame 1, and one end of the wire frame 4 is fixedly connected with one end of the wire frame 4 through welding. The bakelite 2 used for welding is formed at one end of the conductive terminal 1 in an integral injection molding mode, so that the coil 4 is fixedly connected with the conductive terminal 1 in a butt-joint mode after the end part of the coil 4 is wound on the conductive terminal 1, the connection between the coil 4 and the conductive terminal 1 is stable, and the service life of the driving device is prolonged.

One end of the conductive terminal 1 is bent and formed with a winding hook 11 for winding the coil 4, and the other side of the conductive terminal 1 axially passes through the control circuit board 5; an insulating heat conducting pad 34 is arranged between the control circuit board 5 and the wire frame 3. The end part of the conductive terminal 1 is bent to form the winding hook part 11 extending out of the bakelite 2, the end part of the coil 4 is wound on the winding hook part 11, and then the end part of the coil 4 is fixed with the winding hook part 11 in a butt-joint mode, so that the connection stability of the coil 4 and the conductive terminal 1 is further improved, and the coil 4 and the conductive terminal 1 are prevented from being separated due to loosening of welding after a driving device is used for a long time. The insulating thermal pad 34 is a tin pad.

The wire frame 3 comprises a metal frame body 31 and a plastic body 32 which is formed outside the metal frame body 31 by injection molding and is integrally formed with the bakelite 2 and the conductive terminal 1, the control circuit board 5 is arranged at one end of the plastic body 32 through a first screw 33, a cooling fin 35 is arranged between the control circuit board 5 and the plastic body 32, and the insulating heat conducting pad 34 is positioned between the cooling fin 35 and the control circuit board 5; the other end of the plastic body 32 is also provided with a Hall plate 37, and three conductive terminals 1 and the bakelite 2 are integrally formed on the outer wall of the plastic body 32. The first screw 33 penetrates through the insulating heat conducting pad 34, the heat sink 35 and the control circuit board 5 to fix the heat sink 35 on the plastic body 32, and the insulating heat conducting pad 34 and the control circuit board 5 are installed and fixed on the heat sink 35 through the second screw 36. The first screws 33 and the second screws 36 are all circumferentially arranged in three and are distributed at intervals.

In this embodiment, the conductive terminal 1 and the bakelite 2 are first molded into a whole by one-time in-mold injection, and then the conductive terminal 1 and the bakelite 2 are molded into a whole with the metal frame 31 by one-time in-mold injection to form the wire frame 3, and the end face of the bakelite 2 and the two ends of the conductive terminal 1 are protruded outside the plastic body 32; further, the coils 4 are wound on the inner side installation position of the wire frame 3 one by one, then the end parts of the coils 4 are extended to the outer wall of the wire frame 3 and wound on the winding hook parts 11 of the conductive terminals 1, and the coils 4 and the winding hook parts 11 are welded together in a butt welding mode, so that a stator of the driving device is formed; further, the control circuit board 5 is mounted on one end of the wire frame 3, the other end of the conductive terminal 1 passes through the control circuit board 5, and then the conductive terminal 1 is welded on the control circuit board 5 or connected and fixed with a wire; finally, the output rotor 6 of the driving device is installed in the wire frame 3 in a penetrating way, and then the assembly of the driving device can be completed.

Referring to fig. 1 to 9, an electric tool includes a driving device 100, a housing 101 and a rear cover 102 for mounting the driving device 100, the driving device 100 further includes an output rotor 6 disposed in the wire frame 3, and two ends of the output rotor 6 are respectively mounted with a first bearing 61 and a second bearing 62 on the housing 101 and the rear cover 102.

The inner side of the central hole of the rear cover 102 is provided with a mounting hole for mounting the second bearing 62, a clamping groove for limiting the second bearing 62 through a second clamping spring is arranged in the mounting hole, and the inner wall of one side of the clamping groove is an inclined surface.

A fastener for mounting the second bearing 62 is provided at the center hole of the rear cover 102. A fastener for mounting the second bearing 62 is provided at the center hole of the rear cover 102. The second bearing 62 for supporting the output rotor 6 is installed and fixed by the fastener through the fastener formed by integrally injection molding the rear cover 102, the service life of the rear cover 102 for supporting the second bearing 62 is prolonged by utilizing the characteristics of the fastener, and aging, embrittling and cracking of the rear cover 102 after long-term use are avoided. Second, by adopting the driving device 100 with a shorter axial length, the axial distance of the electric tool can be made shorter, the overall structure is more compact, and the electric tool is more convenient for users to carry and use.

The fastener is an insert 7 integrally formed in the rear cover 102, one end of the insert 7 is formed with a first shaft hole shoulder 71 for limiting the second bearing 62, and the other end of the insert 7 is limited to the second bearing 62 through a first clamp spring 8.

The first clamping spring 8 is a taper first clamping spring, the other end of the insert 7 is provided with a mounting groove 72 for mounting the first clamping spring 8, and the inner wall of one side of the mounting groove 72 is an inclined surface. The second bearing 62 is installed and fixed by adopting the taper first clamp spring, the service life of the first clamp spring 8 for fastening the second bearing 62 is prolonged, the second bearing 62 is prevented from loosening after long-term use, the output rotor 6 is prevented from generating eccentricity after long-term use, and the service life of the electric tool is prolonged.

The fastener is a limit stop 70 for limiting the second bearing 62 to the rear cover 102, and the limit stop 70 is fixedly connected to the rear cover 102 by a screw 91 and clamps the second bearing 62 therebetween. The rear cover 102 is matched with the limit stop 70 to clamp and fix the second bearing 62 through the screw 91, so that the installation stability of the second bearing 62 is higher, looseness can not be generated in the use process, and the output rotor 6 and the wire frame 3 keep coaxial operation.

One end of the limit stop 70 is formed with a second shaft Kong Jian 701 for limiting the second bearing 62, and the rear cover 102 is formed with a third shaft hole shoulder 702 for limiting the second bearing 62.

A cooling fan 10 is further mounted at the rear end of the output rotor 6, the other end of the fastening member extends to the center of the cooling fan 10, a cavity 1000 for accommodating the fastening member is formed in the center of the cooling fan 10, and the cooling fan 10 is mounted on the output rotor 6 through a gear member 60 and is located between the fastening member and the wire frame 3; the fastener is a metal piece.

The driving device and other components of the electric tool in the utility model are all conventional components on the market, and are not indicated in the specification and the drawings of the utility model.

It is understood that the foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, but rather is to be accorded the full scope of all such modifications and equivalent structures, features and principles as set forth herein.

Claims

1. A driving device structure, characterized by comprising: the coil winding device comprises a conductive terminal (1), a plurality of coil frames (3) integrally formed with the conductive terminal (1), a plurality of coils (4) which are wound on the coil frames (3) and connected with one end of the conductive terminal (1) and a control circuit board (5) which is arranged at one end of the coil frames (3) and used for the other end of the conductive terminal (1) to pass through, wherein the plurality of conductive terminal (1) are circumferentially arranged on the side wall of the coil frames (3), and one end of the conductive terminal (1) arranged on the side wall of the coil frames (3) is connected with the coils (4).

2. A drive arrangement according to claim 1, characterized in that: the wire frame is characterized in that the wire frame is integrally injection molded with the wire frame (3) into a whole after the wire frame is integrally injection molded with the wire frame (4), and one end of the wire frame is fixedly connected with one end of the wire frame (4) through welding.

3. A drive arrangement according to claim 2, characterized in that: one end of the conductive terminal (1) is bent and formed with a winding hook part (11) for winding the coil (4), and the other side of the conductive terminal (1) axially passes through the control circuit board (5); an insulating heat conducting pad (34) is arranged between the control circuit board (5) and the wire frame (3).

4. A drive arrangement according to claim 3, wherein: the wire frame (3) comprises a metal frame body (31) and a plastic body (32) which is formed outside the metal frame body (31) in an injection molding mode and is integrated with the bakelite (2) and the conductive terminal (1), the control circuit board (5) is installed at one end of the plastic body (32) through a first screw (33), a radiating fin (35) is arranged between the control circuit board (5) and the plastic body (32) to separate, and the insulating heat conducting pad (34) is positioned between the radiating fin (35) and the control circuit board (5); the other end of the plastic body (32) is also provided with a Hall plate (37), and three conductive terminals (1) and bakelite (2) are integrally formed on the outer wall of the plastic body (32).

5. An electric tool, characterized in that: the driving device (100) comprises the driving device (100) according to any one of claims 1-4, a shell (101) and a rear cover (102) for installing the driving device (100), the driving device (100) further comprises an output rotor (6) arranged in the wire frame (3), and two ends of the output rotor (6) are respectively provided with a first bearing (61) and a second bearing (62) which are arranged on the shell (101) and the rear cover (102).

6. A power tool according to claim 5, wherein: the inner side of the central hole of the rear cover (102) is provided with a mounting hole site for mounting the second bearing (62), a clamping groove for limiting the second bearing (62) through a second clamping spring is arranged in the mounting hole site, and the inner wall of one side of the clamping groove is an inclined plane.

7. A power tool according to claim 5, wherein: a fastener for mounting the second bearing (62) is arranged at the central hole of the rear cover (102).

8. A power tool according to claim 7, wherein: the fastener is an insert (7) integrally formed in the rear cover (102), one end of the insert (7) is formed with a first shaft hole shoulder (71) used for limiting the second bearing (62), and the other end of the insert (7) is limited to the second bearing (62) through a first clamp spring (8).

9. A power tool according to claim 8, wherein: the first clamp spring (8) is a taper first clamp spring, the other end of the insert (7) is provided with a mounting groove (72) for mounting the first clamp spring (8), and the inner wall of one side of the mounting groove (72) is an inclined surface.

10. A power tool according to claim 7, wherein: the fastener is a limit stop (70) for limiting the second bearing (62) on the rear cover (102), and the limit stop (70) is fixedly connected with the rear cover (102) through a screw (91) and clamps the second bearing (62) in the middle.