A handheld DC electric tool

Abstract

The present invention relates to the technical field of handheld electric tools, and specifically to a handheld DC electric tool, comprising a first shell and a second shell that can match each other, wherein the first shell and the second shell can form a sealed cavity after being buckled together, wherein a motor module and a drive module are installed in the cavity, wherein one end of the drive module is connected to a battery pack, and the other end is connected to the motor module through a conductor mechanism, wherein the conductor mechanism comprises a hard conductor and a line conversion module. This solution adopts a modular form, which eliminates the tediousness of manual wiring. It only requires pre-planning of the inner wall of the shell to realize modular rapid assembly. It is not only convenient to operate, but also has high connection accuracy of each component. It can also realize intelligent assembly line operation, which can not only reduce dependence on labor and save production costs, but also effectively improve assembly efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of handheld electric tools, and in particular to a handheld direct current electric tool. Background Art

[0002] At present, handheld power tools such as pistol drills and angle grinders on the market are mainly composed of electrical parts and transmission parts. Their working principle is to use DC or AC to drive the spindle to rotate, driving the tool clamped at the front end to work. There are thousands of domestic power tool manufacturers, and the product quality is uneven. In addition to electrical problems such as leakage, insulation, and circuit heating, there are also mechanical failures such as loose connectors, vibration, and wear. After a failure, disassembly and assembly are cumbersome, and the maintenance cost is high. Therefore, many users directly give up maintenance and buy new products instead. Therefore, a handheld power tool that is cheap, reliable, and has a certain service life is urgently needed to fill the market.

[0003] However, given the internal structure of current electric tools, the mechanical part is mainly composed of a large number of parts such as spindles, bearings, large and small gears, retaining rings, and sealing rings. The number and type of parts determine the increase in the time consumed during assembly. Therefore, both the cost of the parts themselves and the labor cost during assembly production are the main factors determining the price of the product. In order to reduce the production cost of the product, most companies are trying to reduce the cost of the product by changing the material of the parts. However, the reduction in the quality of the parts will directly affect the performance of the product. For this reason, companies have tried to improve the difficulty of employment, reduce labor costs, and improve productivity by replacing people with machines. However, given the large number of parts, specifications, and materials in handheld power tools, such as rubber sealing rings, retaining rings and other parts, it is very difficult to implement automation, which directly leads to an increase in the complexity of automation and a straight increase in manufacturing costs. The above problems have become the "neck" problems in the development of power tools.

[0004] In particular, the connection problems of the battery pack pins, the driver module and the switch inside the handheld power tool, as well as the connection problems of the motor module and the driver, etc., the traditional solution is to manually connect them through flexible wires and perform corresponding wiring arrangement in the shell to facilitate the assembly of the shell. This method is not only labor-intensive and has high production costs, but also is affected by personal proficiency and cannot ensure the qualified rate of the product.

[0005] Therefore, a technology is urgently needed to solve this problem. Summary of the invention

[0006] The purpose of the present invention is to overcome the above-mentioned problems of the prior art and to provide a handheld DC electric tool, which adopts the traditional battery pack pins, driver and adjustment switch to form an integrated drive module. The connection between the drive module and the motor module is realized by a conductive mechanism, which not only saves the tedious manual wiring, but also only requires the pre-planning of the inner wall of the shell to achieve modular rapid assembly. It is not only easy to operate, but also has high connection accuracy of each component. While effectively improving the assembly efficiency, it can also effectively save production costs.

[0007] The above objectives are achieved through the following technical solutions:

[0008] A handheld DC electric tool comprises a first shell and a second shell which can match each other. The first shell and the second shell can form a sealed cavity when they are snapped together. A motor module and a drive module are installed in the cavity. One end of the drive module is connected to a battery pack, and the other end is connected to the motor module through a conductor mechanism. The conductor mechanism includes a hard conductor and a line conversion module.

[0009] Furthermore, the driving module includes a semi-enclosed driver housing in which a driver can be embedded, the back of the driver housing is connected to a plug seat, and the plug seat is provided with a power plug that can match the battery pack pin; the power plug is connected to the power pin on the driver; the switch pin of the driver is connected to an adjustment switch; the plug seat is connected to the back of the driver housing at an angle, and includes a support plate, in which a channel is opened for connecting the power plug and the power pin, and a conductor connecting the power plug and the power pin is embedded in the channel.

[0010] Further, the support plate includes a first support plate, a second support plate and a third support plate which are parallel to each other, and correspondingly, the power plug includes a first power plug, a second power plug and a third power plug, the first power plug is fixed by a first clamping seat, the second power plug is fixed by a second clamping seat, and the third power plug is fixed by a third clamping seat; the channel includes a first channel connecting the first support plate and the first clamping seat, a second channel connecting the second support plate and the second clamping seat, and a third channel connecting the third support plate and the third clamping seat, and the first channel, the second channel and the third channel are embedded with the conductor; the driver is also provided with an output plug connected to the power output pin, and the hard conductor is connected to the output plug.

[0011] Furthermore, the driver housing, the insert seat and the support plate are integrally injection molded.

[0012] Furthermore, the driver is connected to the driver housing via screws.

[0013] Furthermore, the conductor material may be a conductive wire, or the same as the hard conductor material.

[0014] Furthermore, the hard conductor includes two connection ends, each of which is provided with a connector that can be quickly connected to the drive module or the line conversion module; the connector is a conductive socket or a conductive plug, and the hard conductor is welded to the conductive socket or the conductive plug, or the hard conductor is stamped into an integral part with the conductive socket or the conductive plug.

[0015] Furthermore, the hard conductor is in the shape of a strip, and each of the hard conductors is separated by a barrier arranged on the inner wall of the first shell or the second shell, and a limiting groove is formed between adjacent barriers; at least one connecting column that can match the connecting hole opened on the hard conductor is also arranged on the inner wall of the first shell or the second shell, and the connecting column can pass through the connecting hole and limit and fix the hard conductor; each of the connecting holes is provided with an arc-shaped edge extending outward to ensure that the conductive performance of each part of the hard conductor is the same.

[0016] Furthermore, the head of the connecting column is in the shape of a cone and is made of a flexible material; the bottom diameter of the cone is larger than the inner diameter of the connecting hole.

[0017] Furthermore, a threaded hole extending vertically downward is provided along the head of the connecting column, and a screw can penetrate through the connecting hole and be screwed into the threaded hole.

[0018] Furthermore, a connecting piece slot capable of clamping the connecting piece is provided on the inner wall of the first shell.

[0019] Furthermore, the wire conversion module includes a wire connection seat, and the two ends of the wire connection seat are respectively provided with a first conversion connector that can be connected to the hard conductor, and a second conversion connector that can be connected to the connection end of the motor module, and the first conversion connector is connected to the second conversion connector.

[0020] Further, the wire connection seat is in an E shape, including a first sheath, a second sheath and a third sheath which are parallel to each other, the first sheath, the second sheath and the third sheath are connected on the same side through a sheath seat, and a first supporting baffle is arranged between the adjacent first sheaths, the second sheaths and the third sheaths; the first conversion connector includes a first wiring body embedded in the first sheath, a second wiring body embedded in the second sheath, and a third wiring body embedded in the third sheath; the second conversion connector includes a fourth wiring body, a fifth wiring body and a third wiring body arranged on one side of the sheath seat Six wiring bodies, the fourth wiring body, the fifth wiring body and the sixth wiring body are respectively perpendicular to the sheath seat, and the end of the fourth wiring body is connected to the embedded end of the first wiring body, the end of the fifth wiring body is connected to the embedded end of the second wiring body, and the end of the sixth wiring body is connected to the embedded end of the third wiring body. A second support baffle is arranged between the adjacent fourth wiring body, the fifth wiring body and the sixth wiring body, and the second support baffle is perpendicular to the sheath seat; the wire connecting seat is installed and limited by a limiting mechanism arranged on the inner wall of the first shell.

[0021] Furthermore, the limiting mechanism includes an H-shaped first limiting reinforcement rib with a limiting groove, and the limiting groove can accommodate the wire connecting seat; the first sheath and the sheath seat constitute a first C-shaped limiting groove, and the third sheath and the sheath seat constitute a second C-shaped limiting groove, and the two ends of the first limiting reinforcement rib are respectively positioned by the first C-shaped limiting groove and the second C-shaped limiting groove; the inner wall of the second shell is provided with a support column, and the support column corresponds to the limiting groove, and is used to longitudinally limit the side of the wire connecting seat.

[0022] Furthermore, the first sheath, the second sheath, the third sheath, the sheath seat, the first supporting baffle and the second supporting baffle are integrally formed and made of insulating material.

[0023] Furthermore, a second limiting reinforcement rib parallel to the first limiting reinforcement rib is also provided on the inner wall of the first shell, and one end of the second limiting reinforcement rib can limit and block the first sheath, the second sheath and the third sheath, and a first guide plate, a second guide plate, a third guide plate and a fourth guide plate parallel to each other are also provided on the second limiting reinforcement rib, the first wiring body is placed between the first guide plate and the second guide plate, the second wiring body is placed between the second guide plate and the third guide plate, and the third wiring body is placed between the third guide plate and the fourth guide plate.

[0024] Furthermore, the hard conductor is made of strip-shaped conductive metal material.

[0025] Beneficial Effects

[0026] The handheld DC electric tool provided by the present invention has the following beneficial effects:

[0027] 1. The traditional battery pack pins, drivers and switches are set as a drive module component, which not only saves the tediousness of manual wiring, but also enables the rapid assembly of the drive component by only planning the inner wall of the shell in advance;

[0028] 2. Use modular hard conductors to quickly connect each power module or power supply module. According to the nature of the electrical connection, such as three-phase electricity, three hard conductors need to be laid out. The inner wall of the shell is planned in advance, and the corresponding barriers are set to realize the rapid assembly of the hard conductors, and the fast plug-in with each power module or power supply module can be realized through the connector;

[0029] 3. A wire conversion module is set between the drive module and the motor module to realize manual or automatic quick wiring, eliminating the problem of installing the motor module and the drive module in the housing separately and then welding the wires separately. It is only necessary to plug or weld the conductor connected to the motor module with one end of the wire conversion module, and directly plug or weld the conductor connected to the drive module with the other end of the wire conversion module to achieve the purpose of quickly connecting the motor module and the drive module. The working range is limited to the position of the wire conversion module;

[0030] This solution adopts a modular form, eliminating the tediousness of manual wiring. It only requires pre-planning of the inner wall of the shell to achieve modular rapid assembly. It is not only easy to operate, but also has high connection accuracy of each component. It can also realize intelligent assembly line operation, which not only reduces dependence on labor and saves production costs, but also effectively improves assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of a structural module of a handheld DC electric tool according to the present invention;

[0032] Figure 2 This is a schematic diagram of the connection of a line conversion module of a handheld DC power tool according to the present invention;

[0033] Figure 3 A three-dimensional diagram of a handheld DC electric tool according to the present invention;

[0034] Figure 4 A cross-sectional view of a handheld DC electric tool according to the present invention;

[0035] Figure 5 This is a schematic diagram of a driving module of a handheld DC electric tool according to the present invention from a first viewing angle;

[0036] Figure 6 This is a schematic diagram of a driving module of a handheld DC electric tool according to the present invention from a second viewing angle;

[0037] Figure 7 A schematic diagram of the connection between the drive module and the battery pack pins of a handheld DC electric tool according to the present invention;

[0038] Figure 8 A cross-sectional view of a drive module of a handheld DC electric tool according to the present invention;

[0039] Fig. 9 A schematic diagram of the connection between the drive module, the battery pack and the conductor mechanism of a handheld DC electric tool according to the present invention;

[0040] Fig.10 It is a schematic diagram of the connection between the conductor mechanism and the first housing of a handheld DC electric tool according to the present invention;

[0041] Fig.11 It is a schematic diagram of the connection between the conductor mechanism and the second housing of a handheld DC electric tool according to the present invention;

[0042] Fig.12 It is a schematic diagram of the connector slot structure corresponding to the conductor mechanism of a handheld DC electric tool described in the present invention;

[0043] Fig.13 It is a schematic diagram of a first type of connecting piece of a hard conductor in a conductor mechanism of a handheld DC electric tool according to the present invention;

[0044] Fig.14 It is a schematic diagram of a second type of connecting piece of a hard conductor in a conductor mechanism of a handheld DC electric tool according to the present invention;

[0045] Fig.15 It is a schematic diagram of a third type of connecting piece of a hard conductor in the conductor mechanism of a handheld DC electric tool described in the present invention;

[0046] Fig.16 It is a schematic diagram of the plugging connection between the conductive socket and the conductive plug of the hard conductive body in the conductive body mechanism of the handheld DC electric tool described in the present invention;

[0047] Fig.17 This is a schematic diagram of the connection between the line conversion module and the first housing of a handheld DC power tool according to the present invention;

[0048] Fig.18 This is a schematic diagram of the connection between the line conversion module and the second housing of a handheld DC power tool according to the present invention;

[0049] Fig.19This is a schematic diagram of the structure of a limit mechanism in a line conversion module of a handheld DC electric tool according to the present invention;

[0050] Fig. 20 This is a schematic diagram of the installation structure of a limit mechanism in a line conversion module of a handheld DC electric tool according to the present invention;

[0051] Fig.21 This is a schematic diagram of a line conversion module of a handheld DC power tool according to the present invention from a first viewing angle;

[0052] Fig. 22 A schematic diagram of a line conversion module of a handheld DC power tool according to the present invention from a second viewing angle;

[0053] Fig.23 A cross-sectional view of a line conversion module of a handheld DC electric tool according to the present invention;

[0054] Fig.24 The present invention is a schematic diagram of the connection between a line conversion module and a hard conductor of a handheld DC power tool.

[0055] Graphic marking:

[0056] 1-driving module, 101-driver, 102-driver housing, 103-plug seat, 104-power plug, 105-adjusting switch, 106-support plate, 107-conductor, 108-first support plate, 109-second support plate, 110-third support plate, 111-first power plug, 112-second power plug, 113-third power plug, 114-first clamping seat, 115-second clamping seat, 116-third clamping seat, 117-output plug, 2-conductive mechanism, 3-hard conductor, 301-connector, 302-conductive socket, 303-conductive plug, 304-blocking, 305-connecting hole, 306-connecting column, 307-arc edge, 308-connector slot, 4-wire conversion module, 401-wire connection seat, 402-first conversion connector, 40 3-second conversion connector, 404-first sheath, 405-second sheath, 406-third sheath, 407-sheath seat, 408-first support baffle, 409-first wiring body, 410-second wiring body, 411-third wiring body, 412-fourth wiring body, 413-fifth wiring body, 414-sixth wiring body, 415-second support baffle, 416-limiting mechanism, 417-limiting groove, 418-first limiting reinforcement rib, 419-second limiting reinforcement rib, 420-first C-shaped limiting groove, 421-second C-shaped limiting groove, 422-support column, 423-first guide plate, 424-second guide plate, 425-third guide plate, 426-fourth guide plate, 5-battery pack, 501-battery pack pin, 6-motor module, 7-first shell, 8-second shell, 9-switch. DETAILED DESCRIPTION

[0057] The present invention is further described in detail below based on the accompanying drawings and embodiments. The described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0058] Example 1

[0059] like Figure 1 , 3 As shown in 4, a handheld DC electric tool includes a first shell 7 and a second shell 8 that can match each other. The first shell 7 and the second shell 8 can form a sealed cavity when they are snapped together. A motor module 6 and a drive module 1 are installed in the cavity. One end of the drive module 1 is connected to a battery pack 5, and the other end is connected to the motor module 6 through a conductor mechanism 2. The conductor mechanism 2 includes a hard conductor 3 and a line conversion module 4.

[0060] Specifically, the first shell 7 and the second shell 8 can be connected by snap-fitting or screw-fixing to form a cylindrical shape that can be held in the hand. The battery pack 5 can be snap-fitted to the end of the shell to supply power to the power unit inside the shell. The motor module in this embodiment includes a motor as a power output source, and a power output part installed on the head of the shell and mechanically connected to the motor, such as a meshing gear, a drill bit, a cutting blade, etc., that is, the handheld power tool is not limited to common power tools such as pistol drills, angle grinders, and electric hammers. The driver module 1 is a driver for common handheld power tools, which is a mainboard structure with power pins, switch pins, and power output pins, etc.

[0061] In this embodiment, the connection form between the motor module 6 and the drive module 1 is different from the traditional wire connection. Instead, a modularly assembled hard conductor 3 is combined with a wire conversion module 4 for quick plug-in. This form can reasonably utilize the space on the inner wall of the shell, has a fast assembly speed and high precision, and can replace labor-intensive assembly lines to realize intelligent unattended assembly.

[0062] Example 2

[0063] like Figure 5-7 As shown, as an optimization of the driving module 1 in this embodiment, the driving module 1 includes a semi-enclosed driver housing 102 in which the driver 101 can be embedded, and the back of the driver housing 102 is connected to a plug seat 103, and the plug seat 103 is provided with a power plug 104 that can match the battery pack pin 501;

[0064] The power plug 104 is connected to the power pin on the driver 101; the switch pin of the driver 101 is connected to an adjustment switch 105, and the adjustment switch 105 is controlled by a switch 9 arranged on the shell through a mechanical structure; the plug seat 103 is connected to the back side of the driver shell 102 at an angle (this structure is mainly for limiting and fixing with the card slot between the shell, which can effectively save space), including a support plate 106, and a channel for connecting the power plug 104 and the power pin is opened in the support plate 106, and a conductor 107 connecting the power plug 104 and the power pin is embedded in the channel.

[0065] Specifically, Figure 8As shown, the support plate 106 includes a first support plate 108, a second support plate 109 and a third support plate 110 which are parallel to each other. Correspondingly, the power plug 104 includes a first power plug 111, a second power plug 112 and a third power plug 113. The first power plug 111 is fixed by a first clamping seat 114, the second power plug 112 is fixed by a second clamping seat 115, and the third power plug 113 is fixed by a third clamping seat 116; the channel includes a first channel connecting the first support plate 108 and the first clamping seat 114, a second channel connecting the second support plate 109 and the second clamping seat 115, and a third channel connecting the third support plate 110 and the third clamping seat 116, and the first channel, the second channel and the third channel are embedded with the conductor 107; the driver 101 is also provided with an output plug 117 connected to the power output pin, and the output plug 117 is connected to the hard conductor 3, as shown in FIG. Fig. 9 shown.

[0066] Specifically, the first power plug 111 , the second power plug 112 and the third power plug 113 in the above embodiment correspond to the three-phase power required for the hand tool to work.

[0067] In this embodiment, the driver housing 102 , the insert seat 103 and the support plate 106 are integrally injection-molded and made of insulating material.

[0068] The driver 101 can be connected to the driver housing 102 by screws or by glue.

[0069] The conductor 107 may be made of conductive wire, such as conventional conductive wire, such as copper wire, etc., or the same material as the hard conductor 3, such as copper bar, aluminum bar, silver bar, etc.

[0070] Example 3

[0071] like Figure 2 , 10 As shown in Figures 1 and 11, as an optimization of the hard conductor 3 in this embodiment, the hard conductor 3 includes two connection ends, each of which is provided with a connector 301 that can be quickly connected to the driving module 1 or the line conversion module 4; the connector 301 is a conductive socket 302 or a conductive plug 303, and the hard conductor 3 is welded to the conductive socket 302 or the conductive plug 303, or the hard conductor 3 is integrally stamped with the conductive socket 302 or the conductive plug 303.

[0072] Specifically, the structural forms of the hard conductor 3 and the connecting member 301 in this embodiment include the following three structures:

[0073] Structure 1

[0074] like Fig.15 As shown, one end of the hard conductor 3 is a conductive socket 302, and the other end is a conductive plug 303; the conductive socket 302 is used to achieve quick plugging with the conductive plug 303 on the drive module 1 or the line conversion module 4, and the conductive plug 303 is used to achieve quick plugging with the conductive socket 302 on the drive module 1 or the line conversion module 4;

[0075] Structure 2

[0076] like Fig.13 As shown, the two ends of the hard conductor 3 are conductive sockets 302, and the conductive sockets 302 are used to achieve quick plug-in with the conductive plugs 303 on the drive module 1 or the line conversion module 4;

[0077] Structure 3

[0078] like Fig.14 As shown, both ends of the hard conductor 3 are conductive plugs 303 , and the conductive plugs 303 are used to achieve quick plugging with the conductive sockets 302 on the drive module 1 or the line conversion module 4 .

[0079] For the connection between the driving module 1 or the line conversion module 4 and the conductive socket 302 or the conductive plug 303, a flexible wire connection can be used. During assembly, it is only necessary to directly connect the power module or the power supply module and the conductive socket 302 or the conductive plug 303 with the corresponding end of the hard conductor 3, thus avoiding wiring, welding and other processes.

[0080] Since the space inside the housing is small, the plug-in form is preferably to plug the conductive socket 302 and the conductive plug 303 longitudinally, that is, plug them in the vertical direction, such as Fig.16 shown.

[0081] In the above embodiment, the hard conductor 3 and the conductive socket 302 or the conductive plug 303 can be connected by welding, or the hard conductor 3 and the conductive socket 302 or the conductive plug 303 can be integrally stamped.

[0082] The hard conductor 3 in this embodiment is made of conductive metal material, such as copper, silver, aluminum, etc., and is in the shape of a thin sheet, and each part has the same conductive property.

[0083] like Fig.12As shown, as a fixing method of the hard conductor 3 in this embodiment, the hard conductor 3 is in a strip shape, and each of the hard conductors 3 is separated by a baffle 304 arranged on the inner wall of the first shell 7 or the second shell 8, and a limiting groove is formed between adjacent baffles 304;

[0084] The purpose of using the baffles 304 is to avoid interference between the paths during current conduction, thereby preventing safety hazards. In addition, each baffle 304 is equivalent to guiding the path of the hard conductor 3, which is more conducive to the pre-fixed installation of the hard conductor 3, so that the subsequent assembly is limited to the plugging of the conductive socket 302 and the conductive plug 303, which is easier to achieve intelligent assembly.

[0085] As a fixing method between the hard conductor 3 and the shell in this embodiment, at least one connecting column 306 that can match the connecting hole 305 opened on the hard conductor 3 is also provided on the inner wall of the first shell 7 or the second shell 8. The connecting column 306 can pass through the connecting hole 305 and limit and fix the hard conductor 3.

[0086] Specifically, it is not limited to the following two structures:

[0087] Structure 1

[0088] The head of the connecting column 306 is set to be a cone, and is made of flexible material; the bottom diameter of the cone is larger than the inner diameter of the connecting hole 305. The cone made of flexible material is easier to be squeezed and deformed to penetrate the connecting hole, and after the external pressure applied by the connecting hole disappears, it deforms and returns to its original state. Since the bottom diameter of the cone is larger than the inner diameter of the connecting hole 305, the hard conductor 3 can be directly fixed after recovery.

[0089] Structure 2

[0090] A threaded hole extending vertically downward is provided along the head of the connecting column 306 , and a screw can pass through the connecting hole 305 and then be screwed into the threaded hole.

[0091] Or, if Fig.12 As shown, the connecting column 306 only plays a guiding and positioning role for the connecting hole 305. The fixation of the hard conductor 3 is achieved by fixing the conductive sockets 302 or conductive plugs 303 at both ends of the hard conductor 3. Specifically, a connecting piece slot 308 that can clamp the conductive socket 302 or the conductive plug 303 is opened on the inner wall of the shell.

[0092] In this embodiment, in order to ensure that the conductive properties of each location on the hard conductor 3 are the same, an arc-shaped edge 307 extending outward is provided at each of the connecting holes 305 .

[0093] Example 4

[0094] like Fig.17 As shown, as an optimization of the line conversion module 4 in this embodiment, the line conversion module 4 includes a line connection seat 401, and the two ends of the line connection seat 401 are respectively provided with a first conversion connector 402 that can be connected to the hard conductor 3, and a second conversion connector 403 that can be connected to the connection end of the motor module 6, and the first conversion connector 402 is connected to the second conversion connector 403.

[0095] Specifically, Figure 21-23 As shown, the wire connection seat 401 is in an E shape, including a first sheath 404, a second sheath 405 and a third sheath 406 which are parallel to each other, the first sheath 404, the second sheath 405 and the third sheath 406 are connected on the same side through a sheath seat 407, and a first supporting baffle 408 is arranged between adjacent first sheaths 404, second sheaths 405 and third sheaths 406; the first conversion connector 402 includes a first wiring body 409 embedded in the first sheath 404, a second wiring body 410 embedded in the second sheath 405, and a third wiring body 411 embedded in the third sheath 406; the second conversion connector 403 includes a first wiring body 409 arranged in the sheath seat 407, a second wiring body 410 embedded in the second sheath 405, and a third wiring body 411 embedded in the third sheath 406; the second conversion connector 403 includes a first wiring body 409 arranged in the sheath seat 407, and ... 7, the fourth wiring body 412, the fifth wiring body 413 and the sixth wiring body 414 are respectively perpendicular to the sheath seat 407, and the end of the fourth wiring body 412 is connected to the embedded end of the first wiring body 409, the end of the fifth wiring body 413 is connected to the embedded end of the second wiring body 410, and the end of the sixth wiring body 414 is connected to the embedded end of the third wiring body 411, and a second supporting baffle 415 is provided between the adjacent fourth wiring body 412, the fifth wiring body 413 and the sixth wiring body 414, and the second supporting baffle 415 is perpendicular to the sheath seat 407.

[0096] In this embodiment, the first sheath 404, the second sheath 405, the third sheath 406, the sheath seat 407, the first supporting baffle 408 and the second supporting baffle 415 are integrally formed and made of insulating materials such as rubber, plastic and the like.

[0097] like Fig.19 and 20 As shown, in order to ensure that the wire connection seat 401 does not shift in the cavity, a limiting mechanism 416 is further provided on the inner wall of the first shell 7 to limit the wire connection seat 401 , so that assembly only needs to be performed within the area of ​​the limiting mechanism 416 .

[0098] Specifically, the limiting mechanism 416 includes an H-shaped first limiting reinforcement rib 418 with a limiting groove 417, and the limiting groove 417 can accommodate the wire connecting seat 401; the first sheath 404 and the sheath seat 407 constitute a first C-shaped limiting groove 420, and the third sheath 406 and the sheath seat 407 constitute a second C-shaped limiting groove 421, and the two ends of the first limiting reinforcement rib 418 are respectively positioned by the first C-shaped limiting groove 420 and the second C-shaped limiting groove 421.

[0099] like Fig.18 As shown, in order to fix the wire connection seat 401 well on the limiting mechanism 416, a support column 422 is provided on the inner wall of the second shell 8, and the support column 422 corresponds to the limiting groove 417. When the shells are buckled, the support column 4223 can act on the surface of the wire connection seat 401 to resist, thereby realizing longitudinal limitation of the side of the wire connection seat 401.

[0100] As a further optimization of the limiting mechanism 416 in this embodiment, Fig.19 and 20 As shown, a second limiting reinforcement rib 419 parallel to the first limiting reinforcement rib 418 is also provided on the inner wall of the first shell 7, and one end of the second limiting reinforcement rib 419 can limit and block the first sheath 404, the second sheath 405 and the third sheath 406, and the second limiting reinforcement rib 419 is also provided with a first guide plate 423, a second guide plate 424, a third guide plate 425 and a fourth guide plate 426 parallel to each other, the first wiring body 409 is placed between the first guide plate 423 and the second guide plate 424, the second wiring body 410 is placed between the second guide plate 424 and the third guide plate 425, and the third wiring body 411 is placed between the third guide plate 425 and the fourth guide plate 426.

[0101] In this embodiment, if Fig.24 As shown, the first wiring body 409, the second wiring body 410, the third wiring body 411, the fourth wiring body 412, the fifth wiring body 413 and the sixth wiring body 414 can be made of conductive metal sheets, such as sheet metal sheets, copper sheets, aluminum sheets, etc., and the connection with the connector 301 at the end of the hard conductor 3 and the motor module 6 can be in the form of welding or male and female plug-in.

[0102] The above description is only for illustrating the implementation mode of the present invention and is not intended to limit the present invention. For those skilled in the art, any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A handheld DC power tool, It is characterized in that The device comprises a first shell and a second shell which can match each other, wherein the first shell and the second shell can form a sealed cavity after being buckled together, wherein a motor module and a drive module are installed in the cavity, wherein one end of the drive module is connected to the battery pack, and the other end is connected to the motor module through a conductor mechanism, wherein the conductor mechanism comprises a hard conductor and a line conversion module; The drive module comprises a semi-enclosed driver housing in which a driver can be embedded, a plug seat is connected to the back of the driver housing, and a power plug that can match the battery pack pin is arranged on the plug seat; the power plug is connected to the power pin on the driver; the switch pin of the driver is connected to an adjustment switch; the plug seat is connected to the back of the driver housing at an angle, and comprises a support plate, a channel for connecting the power plug and the power pin is opened in the support plate, and a conductor connecting the power plug and the power pin is embedded in the channel; The hard conductor is made of strip-shaped conductive metal material.

2. A handheld DC electric tool according to claim 1, It is characterized in that The support plate includes a first support plate, a second support plate and a third support plate which are parallel to each other. Correspondingly, the power plug includes a first power plug, a second power plug and a third power plug, the first power plug is fixed by a first clamping seat, the second power plug is fixed by a second clamping seat, and the third power plug is fixed by a third clamping seat; the channel includes a first channel connecting the first support plate and the first clamping seat, a second channel connecting the second support plate and the second clamping seat, and a third channel connecting the third support plate and the third clamping seat, and the first channel, the second channel and the third channel are embedded with the conductor; the driver is also provided with an output plug connected to the power output pin, and the hard conductor is connected to the output plug.

3. A handheld DC power tool according to claim 1, It is characterized in that The hard conductor includes two connection ends, each of which is provided with a connector that can be quickly connected to the drive module or the line conversion module; the connector is a conductive socket or a conductive plug, and the hard conductor is welded to the conductive socket or the conductive plug, or the hard conductor is integrally stamped with the conductive socket or the conductive plug.

4. A handheld DC electric tool according to claim 3, It is characterized in that The hard conductor is in the shape of a strip, and each of the hard conductors is separated by a barrier arranged on the inner wall of the first shell or the second shell, and a limiting groove is formed between adjacent barriers; at least one connecting column that can match the connecting hole opened on the hard conductor is also arranged on the inner wall of the first shell or the second shell, and the connecting column can pass through the connecting hole and limit and fix the hard conductor; each of the connecting holes is provided with an arc-shaped edge extending outward to ensure that the conductive performance of each part of the hard conductor is the same.

5. A handheld DC electric tool according to claim 1, It is characterized in that The wire conversion module includes a wire connection seat, and the two ends of the wire connection seat are respectively provided with a first conversion connector that can be connected to the hard conductor, and a second conversion connector that can be connected to the connection end of the motor module, and the first conversion connector is connected to the second conversion connector.

6. A handheld DC electric tool according to claim 5, It is characterized in that The wire connection seat is in an E shape, including a first sheath, a second sheath and a third sheath which are parallel to each other, the first sheath, the second sheath and the third sheath are connected on the same side through a sheath seat, and a first supporting baffle is arranged between the adjacent first sheath, the second sheath and the third sheath; the first conversion connector includes a first wiring body embedded in the first sheath, a second wiring body embedded in the second sheath, and a third wiring body embedded in the third sheath; the second conversion connector includes a fourth wiring body, a fifth wiring body and a sixth wiring body arranged on one side of the sheath seat The fourth wiring body, the fifth wiring body and the sixth wiring body are respectively perpendicular to the sheath seat, and the end of the fourth wiring body is connected to the embedded end of the first wiring body, the end of the fifth wiring body is connected to the embedded end of the second wiring body, and the end of the sixth wiring body is connected to the embedded end of the third wiring body. A second supporting baffle is arranged between the adjacent fourth wiring body, the fifth wiring body and the sixth wiring body, and the second supporting baffle is perpendicular to the sheath seat; the wire connecting seat is installed and limited by a limiting mechanism arranged on the inner wall of the first shell.

7. A handheld DC electric tool according to claim 6, It is characterized in that The limiting mechanism includes an H-shaped first limiting reinforcement rib with a limiting groove, and the limiting groove can accommodate the wire connecting seat; the first sheath and the sheath seat constitute a first C-shaped limiting groove, and the third sheath and the sheath seat constitute a second C-shaped limiting groove, and the two ends of the first limiting reinforcement rib are respectively positioned by the first C-shaped limiting groove and the second C-shaped limiting groove; the inner wall of the second shell is provided with a support column, and the support column corresponds to the limiting groove, and is used to longitudinally limit the side of the wire connecting seat.

8. A handheld DC electric tool according to claim 7, It is characterized in that A second limiting reinforcement rib parallel to the first limiting reinforcement rib is also provided on the inner wall of the first shell, and one end of the second limiting reinforcement rib can limit and block the first sheath, the second sheath and the third sheath, and a first guide plate, a second guide plate, a third guide plate and a fourth guide plate parallel to each other are also provided on the second limiting reinforcement rib, the first wiring body is placed between the first guide plate and the second guide plate, the second wiring body is placed between the second guide plate and the third guide plate, and the third wiring body is placed between the third guide plate and the fourth guide plate.

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