阅读说明：本技术 一种安全系数高的电动工具 (Electric tool with high safety factor ) 是由 李玉盛 于 2020-06-10 设计创作，主要内容包括：本发明涉及一种安全系数高的电动工具,包括主体、把手、钻杆、连接器和传动轴,所述主体的形状为长方体,所述把手固定在主体上,所述主体的一侧设有安装孔,所述传动轴穿过安装孔,所述传动轴与安装孔的内壁滑动且密封连接,所述钻杆位于主体的外部,所述钻杆通过连接器安装在传动轴的一端,所述连接器与主体之间设有间隙,所述主体内设有驱动机构和散热机构,所述驱动机构包括驱动组件和连接组件,所述连接组件包括驱动盘、转动轴、第一轴承、从动盘和三个连接单元,该安全系数高的电动工具通过驱动机构实现了驱动钻杆转动的功能,不仅如此,还通过散热机构实现了散热的功能。(The invention relates to an electric tool with high safety coefficient, which comprises a main body, a handle, a drill rod, a connector and a transmission shaft, the main body is cuboid, the handle is fixed on the main body, one side of the main body is provided with a mounting hole, the transmission shaft penetrates through the mounting hole, the transmission shaft is connected with the inner wall of the mounting hole in a sliding and sealing way, the drill rod is positioned outside the main body and is arranged at one end of the transmission shaft through a connector, a gap is arranged between the connector and the main body, a driving mechanism and a heat dissipation mechanism are arranged in the main body, the driving mechanism comprises a driving component and a connecting component, the connecting component comprises a driving disk, a rotating shaft, a first bearing, a driven disk and three connecting units, this electric tool that factor of safety is high has realized the pivoted function of drive drilling rod through actuating mechanism, and so on, still realized radiating function through heat dissipation mechanism.)

1. The utility model provides an electric tool that factor of safety is high, includes main part (1), handle (2), drilling rod (3), connector (4) and transmission shaft (5), the shape of main part (1) is the cuboid, handle (2) are fixed in main part (1), one side of main part (1) is equipped with the mounting hole, the mounting hole is passed in transmission shaft (5), transmission shaft (5) and the inner wall of mounting hole slide and sealing connection, drilling rod (3) are located the outside of main part (1), one end at transmission shaft (5) is installed through connector (4) in drilling rod (3), be equipped with the clearance between connector (4) and main part (1), its characterized in that, be equipped with actuating mechanism and heat dissipation mechanism in main part (1);

the driving mechanism comprises a driving assembly and a connecting assembly, the connecting assembly comprises a driving disc (6), a rotating shaft (7), a first bearing (8), a driven disc (9) and three connecting units, the driving disc (6), the driven disc (9) and the rotating shaft (7) are all coaxially arranged with the transmission shaft (5), the driven disc (9) is installed at one end of the transmission shaft (5) far away from a screw rod (17), the driving disc (6) is located at one side of the driven disc (9) far away from the transmission shaft (5) and is provided with a gap between the driven disc (9) and is smaller than the distance between a connector (4) and a main body (1), the rotating shaft (7) is fixed at one side of the driving disc (6) far away from the driven disc (9), the inner ring of the first bearing (8) is installed on the rotating shaft (7), the outer ring of the first bearing (8) is fixed on the inner wall of the main body (1), the driving assembly is in transmission connection with the rotating shaft (7), and the connecting units are circumferentially and uniformly distributed on one side, far away from the driving disc (6), of the driven disc (9) by taking the axis of the transmission shaft (5) as a center;

the connecting unit comprises a ball (10), a supporting block (11), a moving rod (12), a spring (13) and a connecting block (14), the moving rod (12) is parallel to the transmission shaft (5), the supporting block (11) is fixed on the inner wall of the main body (1), a connecting hole is formed in the supporting block (11), the moving rod (12) penetrates through the connecting hole and is in sliding connection with the inner wall of the connecting hole, the connecting block (14) is fixed at one end, far away from the driven disc (9), of the moving rod (12), the ball (10) is fixed at the other end of the moving rod (12), the spring (13) is located between the supporting block (11) and the connecting block (14), the connecting block (14) is connected with the supporting block (11) through the spring (13), an annular groove is formed in one side, far away from the driving disc (6), of the driven disc (9), and the center of the ball (10) is, the ball (10) is matched with the annular groove and is in sliding connection with the inner wall of the annular groove, and the ball diameter of the ball (10) is larger than the width of the notch of the annular groove;

the heat dissipation mechanism comprises fan blades (15), a first filter screen (16) and three heat dissipation assemblies, the fan blades (15) are mounted on the rotating shaft (7), one side, far away from the drill rod (3), of the main body (1) is provided with an air outlet, the first filter screen (16) is mounted in the air outlet, and the heat dissipation assemblies are located on one side, far away from the driving disc (6), of the driven disc (9) and correspond to the connecting blocks (14) one by one;

the heat dissipation assembly comprises a screw rod (17), a ball screw bearing (18), a connecting shaft (19), a second bearing (20), an air pipe (21), a second filter screen (22), a sealing disc (23), a through hole and an air inlet hole, wherein the air inlet hole and the through hole are all arranged on one side, close to the drill rod (3), of the main body (1), the air pipe (21) and the connecting shaft (19) are all parallel to the transmission shaft (5), the air pipe (21) is located between the transmission shaft (5) and the moving rod (12), one end, close to the drill rod (3), of the air pipe (21) is inserted into the air inlet hole, the second filter screen (22) is installed at the other end of the air pipe (21), the air pipe (21) is sealed and fixedly connected with the inner wall of the air inlet hole, the sealing disc (23) is coaxially arranged with the air pipe (21) and covers one side, close to the drill rod (3), of the, connecting axle (19) are located between trachea (21) and carriage release lever (12), the through-hole is passed in connecting axle (19), connecting axle (19) slide and sealing connection with the inner wall of through-hole, lead screw (17) and the coaxial setting of connecting axle (19), the one end of keeping away from drilling rod (3) in connecting axle (19) is fixed in lead screw (17), the other end and sealed dish (23) fixed connection of connecting axle (19), the inner circle of second bearing (20) is installed on connecting axle (19), the outer lane of second bearing (20) and the inner wall fixed connection of main part (1), be equipped with the external screw thread on lead screw (17), the inner circle and the external screw thread of ball bearing (18) match and install on lead screw (17), the outer lane of ball bearing (18) is fixed on connecting block (14).

2. The high margin of safety power tool of claim 1, wherein the inner wall of the through hole is coated with a sealing grease.

3. The electric tool with high safety factor as claimed in claim 1, wherein both ends of the connecting shaft (19) are provided with chamfers.

4. The high safety factor power tool as claimed in claim 1, wherein the travel bar (12) is coated with a lubricant.

5. The electric tool with high safety factor as claimed in claim 1, wherein the driving assembly comprises a driving motor (24), a driving gear (25) and a driven gear (26), the driving motor (24) is fixed on the inner wall of the main body (1) and is in transmission connection with the driving gear (25), and the driven gear (26) is installed on the rotating shaft (7) and is meshed with the driving gear (25).

6. The high safety factor power tool of claim 5, wherein the drive motor (24) is a servo motor.

7. The electric tool with high safety factor according to claim 1, wherein at least two auxiliary rods (27) are arranged on one side, close to the driven disc (9), of the driving disc (6), the auxiliary rods (27) are parallel to the rotating shaft (7), the auxiliary rods (27) are circumferentially and uniformly fixed on the driving disc (6) by taking the axis of the rotating shaft (7) as the center, a gap is formed between the auxiliary rods (27) and the driving disc (6), at least two blind holes are arranged on one side, close to the driving disc (6), of the driven disc (9), the blind holes and the auxiliary rods (27) are in one-to-one correspondence and are coaxially arranged, and the blind holes are matched with the auxiliary rods (27).

8. The electric tool with high safety factor as claimed in claim 1, characterized in that the side of the driving disk (6) close to the driven disk (9) is provided with anti-slip threads.

9. The high safety electric tool as claimed in claim 1, wherein the connecting block (14) is provided with an anti-corrosion zinc coating.

10. The electric tool with high safety factor as claimed in claim 1, wherein the driven disc (9) is connected with the inner wall of the main body (1) in a sliding and sealing mode, three auxiliary holes are formed in the driven disc (9), the auxiliary holes correspond to the movable rods (12) one by one, the axis of each auxiliary hole is parallel to the axis of the transmission shaft (5), and 2 times of the distance between the axis of each auxiliary hole and the axis of the transmission shaft (5) is larger than the diameter of the driving disc (6).

Technical Field

The invention relates to the field of electric tools, in particular to an electric tool with high safety coefficient.

Background

The electric drill is a drilling tool powered by an alternating current power supply or a direct current battery, and is a handheld electric tool.

The current pistol bores at the drilling in-process, and the inside a large amount of heats that can produce of pistol drill, and the pistol drill can shorten its life under being in high temperature environment for a long time, moreover, when the drilling rod when not driling, the drilling rod under the rotation state easily causes the injury to the human body, has reduced the security.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: in order to overcome the defects of the prior art, the electric tool with high safety factor is provided.

The technical scheme adopted by the invention for solving the technical problems is as follows: an electric tool with high safety coefficient comprises a main body, a handle, a drill rod, a connector and a transmission shaft, wherein the main body is in a cuboid shape, the handle is fixed on the main body, one side of the main body is provided with a mounting hole, the transmission shaft penetrates through the mounting hole, the transmission shaft is in sliding and sealing connection with the inner wall of the mounting hole, the drill rod is positioned outside the main body, the drill rod is installed at one end of the transmission shaft through the connector, a gap is formed between the connector and the main body, and a driving mechanism and a heat dissipation mechanism are arranged in the main body;

the driving mechanism comprises a driving assembly and a connecting assembly, the connecting assembly comprises a driving disc, a rotating shaft, a first bearing, a driven disc and three connecting units, the driving disc, the driven disc and the rotating shaft are coaxially arranged with the transmission shaft, the driven disc is installed at one end, far away from the screw rod, of the transmission shaft, the driving disc is located at one side, far away from the transmission shaft, of the driven disc, a gap is formed between the driving disc and the driven disc and smaller than the distance between the connector and the main body, the rotating shaft is fixed at one side, far away from the driven disc, of the driving disc, the inner ring of the first bearing is installed on the rotating shaft, the outer ring of the first bearing is fixed on the inner wall of the main body, the driving assembly is in transmission connection with the rotating shaft, and the connecting units;

the connecting unit comprises a ball, a supporting block, a moving rod, a spring and a connecting block, the moving rod is parallel to the transmission shaft, the supporting block is fixed on the inner wall of the main body, a connecting hole is formed in the supporting block, the moving rod penetrates through the connecting hole and is in sliding connection with the inner wall of the connecting hole, the connecting block is fixed at one end, far away from the driven disc, of the moving rod, the ball is fixed at the other end of the moving rod, the spring is located between the supporting block and the connecting block, the connecting block is connected with the supporting block through the spring, an annular groove is formed in one side, far away from the driving disc, of the driven disc, the center of the ball is arranged in the annular groove, the ball is matched with the annular groove and;

the heat dissipation mechanism comprises fan blades, a first filter screen and three heat dissipation assemblies, the fan blades are arranged on the rotating shaft, one side of the main body, which is far away from the drill rod, is provided with an air outlet, the first filter screen is arranged in the air outlet, and the heat dissipation assemblies are positioned on one side of the driven disc, which is far away from the driving disc, and correspond to the connecting blocks one by one;

the heat dissipation assembly comprises a screw rod, a ball screw bearing, a connecting shaft, a second bearing, a gas pipe, a second filter screen, a sealing disc, a through hole and an air inlet hole, wherein the air inlet hole and the through hole are arranged on one side, close to the drill rod, of the main body, the gas pipe and the connecting shaft are parallel to the transmission shaft, the gas pipe is arranged between the transmission shaft and the moving rod, one end, close to the drill rod, of the gas pipe is inserted into the air inlet hole, the second filter screen is arranged at the other end of the gas pipe, the gas pipe is in sealed and fixed connection with the inner wall of the air inlet hole, the sealing disc is coaxially arranged with the gas pipe and covers the side, close to the drill rod, of the main body, the sealing disc is in sealed connection with the air inlet hole, the connecting shaft is positioned between the gas pipe and the moving rod, the other end and the sealed dish fixed connection of connecting axle, the inner circle of second bearing is installed on the connecting axle, the outer lane of second bearing and the inner wall fixed connection of main part, be equipped with the external screw thread on the lead screw, ball bearing's inner circle and external screw thread match and install on the lead screw, ball bearing's outer lane is fixed on the connecting block.

Preferably, in order to reduce a gap between an inner wall of the through-hole and the connecting shaft, the inner wall of the through-hole is coated with a sealing grease.

Preferably, in order to facilitate the installation of the connecting shaft, chamfers are arranged at two ends of the connecting shaft.

Preferably, the moving rod is coated with a lubricating oil in order to reduce friction between the moving rod and the inner wall of the coupling hole.

Preferably, in order to drive the rotation shaft to rotate, the driving assembly includes a driving motor fixed on the inner wall of the main body and in transmission connection with the driving gear, a driving gear, and a driven gear installed on the rotation shaft and engaged with the driving gear.

Preferably, the drive motor is a servo motor in order to increase the drive force of the drive motor.

Preferably, in order to avoid slipping between the driving disc and the driven disc, one side of the driving disc close to the driven disc is provided with at least two auxiliary rods, the auxiliary rods are parallel to the rotating shaft, the auxiliary rods are circumferentially and uniformly fixed on the driving disc by taking the axis of the rotating shaft as a center, a gap is formed between the auxiliary rods and the driving disc, one side of the driven disc close to the driving disc is provided with at least two blind holes, the blind holes correspond to the auxiliary rods one to one and are coaxially arranged, and the blind holes are matched with the auxiliary rods.

Preferably, in order to further avoid the slip between the driving disc and the driven disc, the side of the driving disc close to the driven disc is provided with anti-slip threads.

Preferably, in order to prolong the service life of the connecting block, an anti-corrosion zinc coating is arranged on the connecting block.

Preferably, in order to improve the heat dissipation effect, the driven plate slides and is connected with the inner wall of the main body in a sealing mode, three auxiliary holes are formed in the driven plate and correspond to the moving rods one to one, the axis of each auxiliary hole is parallel to the axis of the transmission shaft, and 2 times of the distance between the axis of each auxiliary hole and the axis of the transmission shaft is larger than the diameter of the driving plate.

The electric tool with high safety factor has the advantages that the electric tool with high safety factor realizes the function of driving the drill rod to rotate through the driving mechanism, compared with the existing driving mechanism, the driving mechanism can enable the drill rod to be in a state of stopping rotating during the period of not drilling, the drill rod in the rotating state is prevented from damaging a human body, the safety is higher, in addition, the driving mechanism and the heat dissipation mechanism realize an integrated linkage structure, the practicability is higher, not only is the heat dissipation function realized through the heat dissipation mechanism, but also the heat dissipation mechanism realizes the function of collecting scraps generated during drilling compared with the existing heat dissipation mechanism, in addition, after the drilling is finished, the air inlet hole is blocked through the sealing disc, the scraps can be prevented from leaking from the water pipe, and the practicability is higher.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic view of a high safety power tool of the present invention;

FIG. 2 is a schematic structural view of a high-margin power tool coupling assembly of the present invention;

FIG. 3 is an enlarged view of portion A of FIG. 1;

FIG. 4 is a schematic diagram of the drive assembly of the high safety power tool of the present invention;

in the figure: 1. the automatic drilling machine comprises a main body, a handle, a drill rod, a connector, a transmission shaft, a driving plate, a rotating shaft, a first bearing, a driven plate, a ball, a supporting block, a movable rod, a spring, a connecting block, a fan blade, a filter screen, a screw rod, a ball screw bearing, a connecting shaft, a second bearing, a gas pipe, a second filter screen, a sealing disc, a driving motor, a driving gear, a driven gear and an auxiliary rod, wherein the main body comprises 2, the handle, 3, the drill rod, 4, the connector, 5, the transmission shaft and 6.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

As shown in fig. 1-3, an electric tool with a high safety factor comprises a main body 1, a handle 2, a drill rod 3, a connector 4 and a transmission shaft 5, wherein the main body 1 is cuboid, the handle 2 is fixed on the main body 1, one side of the main body 1 is provided with a mounting hole, the transmission shaft 5 penetrates through the mounting hole, the transmission shaft 5 is in sliding and sealing connection with the inner wall of the mounting hole, the drill rod 3 is positioned outside the main body 1, the drill rod 3 is mounted at one end of the transmission shaft 5 through the connector 4, a gap is formed between the connector 4 and the main body 1, and a driving mechanism and a heat dissipation mechanism are arranged in the main body 1;

the driving mechanism comprises a driving component and a connecting component, the connecting component comprises a driving disk 6, a rotating shaft 7, a first bearing 8, a driven disk 9 and three connecting units, the driving disc 6, the driven disc 9 and the rotating shaft 7 are all arranged coaxially with the transmission shaft 5, the driven disc 9 is arranged at one end of the transmission shaft 5 far away from the screw rod 17, the driving disk 6 is positioned on one side of the driven disk 9 far away from the transmission shaft 5, a gap is arranged between the driving disk 6 and the driven disk 9 and is smaller than the distance between the connector 4 and the main body 1, the rotating shaft 7 is fixed on one side of the driving disc 6 far away from the driven disc 9, the inner ring of the first bearing 8 is arranged on the rotating shaft 7, the outer ring of the first bearing 8 is fixed on the inner wall of the main body 1, the driving component is in transmission connection with the rotating shaft 7, the connecting units are circumferentially and uniformly distributed on one side of the driven disc 9 far away from the driving disc 6 by taking the axis of the transmission shaft 5 as a center;

the connection unit includes balls 10, a support block 11, a moving rod 12, a spring 13 and a connection block 14, the moving rod 12 is parallel to the transmission shaft 5, the supporting block 11 is fixed on the inner wall of the main body 1, the supporting block 11 is provided with a connecting hole, the movable rod 12 passes through the connecting hole and is connected with the inner wall of the connecting hole in a sliding way, the connecting block 14 is fixed at one end of the moving rod 12 far away from the driven disc 9, the ball 10 is fixed at the other end of the moving rod 12, the spring 13 is positioned between the supporting block 11 and the connecting block 14, the connecting block 14 is connected with the supporting block 11 through the spring 13, one side of the driven disc 9, which is far away from the driving disc 6, is provided with an annular groove, the spherical center of the ball 10 is arranged in the annular groove, the ball 10 is matched with the annular groove and is in sliding connection with the inner wall of the annular groove, and the ball diameter of the ball 10 is larger than the width of the notch of the annular groove;

the heat dissipation mechanism comprises fan blades 15, a first filter screen 16 and three heat dissipation components, wherein the fan blades 15 are arranged on the rotating shaft 7, one side of the main body 1, which is far away from the drill rod 3, is provided with an air outlet, the first filter screen 16 is arranged in the air outlet, and the heat dissipation components are positioned on one side of the driven disc 9, which is far away from the driving disc 6, and correspond to the connecting blocks 14 one by one;

the heat dissipation assembly comprises a screw rod 17, a ball screw bearing 18, a connecting shaft 19, a second bearing 20, an air pipe 21, a second filter screen 22, a sealing disc 23, a through hole and an air inlet hole, the air inlet hole and the through hole are all arranged on one side, close to the drill rod 3, of the main body 1, the air pipe 21 and the connecting shaft 19 are all parallel to the transmission shaft 5, the air pipe 21 is positioned between the transmission shaft 5 and the moving rod 12, one end, close to the drill rod 3, of the air pipe 21 is inserted into the air inlet hole, the second filter screen 22 is installed at the other end of the air pipe 21, the air pipe 21 is sealed and fixedly connected with the inner wall of the air inlet hole, the sealing disc 23 is coaxially arranged with the air pipe 21 and covers the side, close to the drill rod 3, of the main body 1, the sealing disc 23 is connected with the air inlet hole, the connecting shaft 19 is, the utility model discloses a drilling rod, including connecting axle 19, lead screw 17, connecting axle 19, connecting axle 20, inner circle, outer lane and main part 1, lead screw 17 and the coaxial setting of connecting axle 19, lead screw 17 fixes the one end of keeping away from drilling rod 3 at connecting axle 19, the other end and sealed dish 23 fixed connection of connecting axle 19, the inner circle of second bearing 20 is installed on connecting axle 19, the outer lane of second bearing 20 and the inner wall fixed connection of main part 1, be equipped with the external screw thread on the lead screw 17, ball bearing 18's inner circle and external screw thread match and install on lead screw 17.

The user holds the handle 2, then pushes one end of the drill rod 3 far away from the main body 1 against a workpiece, and pushes the main body 1 to move towards the direction close to the workpiece through the handle 2, so that the driving disc 6 can be attached to the driven disc 9, the movement of the main body 1 drives the supporting block 11 to synchronously move, the spring 13 is stretched, the rotating shaft 7 drives the driving disc 6 to rotate under the supporting action of the first bearing 8 through the driving component, the rotation of the driving disc 6 drives the driven disc 9 to rotate through friction, and the balls 10 slide in the annular groove, here, the effect of supporting the driven disc 9 to rotate can be achieved through the matching of the balls 10 and the annular groove, meanwhile, the rotation of the driven disc 9 enables the transmission shaft 5 to drive the drill rod 3 to rotate through the connector 4, so that drilling can be achieved, and the connecting block 14 drives the ball screw bearing 18 to move on the screw rod 17 through the relative movement between the main body 1 and the driven, because the ball screw bearing 18 is a bearing which converts the rotary motion into the linear motion or converts the linear motion into the rotary motion, the screw 17 can be rotated, the rotation of the screw 17 drives the connecting shaft 19 to rotate under the supporting action of the second bearing 20, the rotation of the connecting shaft 19 drives the sealing disc 23 to synchronously move and separate the sealing disc 23 from the air inlet hole, during the period, the rotation of the rotating shaft 7 drives the fan blades 15 to rotate, so that the air in the main body 1 is discharged from the air outlet hole, and the air outside the main body 1 is conveyed into the main body 1 from the air inlet pipe 21, here, the heat in the main body 1 can be discharged through the circulation of the air in the main body 1 and the air outside the main body 1, the heat dissipation is realized, in addition, the scraps generated during the drilling can be sucked into the air pipe 21 and intercepted through the filter screen under the action of air flow, after the drilling is finished, the drill rod 3, make connecting block 14 remove towards keeping away from driving-disc 6 direction under spring 13's elastic action, connecting block 14's removal loops through carriage release lever 12 and ball 10 and drives driven plate 9 and driving-disc 6 separation, can make driven plate 9 stall, prevent that the rotation of drilling rod 3 from causing the injury to the human body, the security has been improved, and, through driven plate 9 and driving-disc 6's separation, can drive ball bearing 18 and realize resetting on lead screw 17, thereby can make lead screw 17 antiport, and make sealed dish 23 block up the inlet port, prevent that the piece from taking place to leak.

Preferably, in order to reduce the gap between the inner wall of the through-hole and the connecting shaft 19, the inner wall of the through-hole is coated with a sealing grease.

The sealing grease has the function of reducing the gap between the inner wall of the through hole and the connecting shaft 19, and the sealing performance is improved.

Preferably, to facilitate the installation of the connecting shaft 19, both ends of the connecting shaft 19 are provided with chamfers.

The chamfer serves to reduce the caliber of the connecting shaft 19 when passing through the through hole, and has the effect of convenient installation.

Preferably, in order to reduce the friction between the moving rod 12 and the inner wall of the coupling hole, the moving rod 12 is coated with a lubricating oil.

The lubricating oil has the function of reducing the friction force between the moving rod 12 and the inner wall of the connecting hole, and the moving fluency of the moving rod 12 is improved.

As shown in fig. 4, the driving assembly includes a driving motor 24, a driving gear 25, and a driven gear 26, the driving motor 24 is fixed on the inner wall of the main body 1 and is in transmission connection with the driving gear 25, and the driven gear 26 is mounted on the rotating shaft 7 and is engaged with the driving gear 25.

The driving motor 24 is started, so that the driving gear 25 drives the driven gear 26 to rotate, and the rotation of the driven gear 26 drives the rotating shaft 7 to rotate under the supporting action of the first bearing 8.

Preferably, the driving motor 24 is a servo motor in order to increase the driving force of the driving motor 24.

The servo motor has a characteristic of strong overload capability, so that the driving force of the driving motor 24 can be improved.

Preferably, in order to avoid slipping between the driving disc 6 and the driven disc 9, at least two auxiliary rods 27 are arranged on one side, close to the driven disc 9, of the driving disc 6, the auxiliary rods 27 are parallel to the rotating shaft 7, the auxiliary rods 27 are circumferentially and uniformly fixed on the driving disc 6 by taking the axis of the rotating shaft 7 as the center, a gap is formed between the auxiliary rods 27 and the driving disc 6, at least two blind holes are arranged on one side, close to the driving disc 6, of the driven disc 9, the blind holes and the auxiliary rods 27 are in one-to-one correspondence and are coaxially arranged, and the blind holes are matched with the auxiliary rods 27.

During driving-disc 6 and driven plate 9 laminate, can make auxiliary rod 27 and driven plate 9 support and lean on, along with driven plate 9 rotate and with driving-disc 6 between the distance reduce, can make auxiliary rod 27 insert in the blind hole, through the cooperation between auxiliary rod 27 and the blind hole, can be convenient for driving-disc 6 drives driven plate 9 and rotates, prevents to skid between driving-disc 6 and the driven plate 9.

Preferably, in order to further avoid the slip between the driving disk 6 and the driven disk 9, the side of the driving disk 6 close to the driven disk 9 is provided with anti-slip threads.

The anti-slip threads are used for improving the friction force between the driving disc 6 and the driven disc 9, so that the slipping between the driving disc 6 and the driven disc 9 can be further avoided.

Preferably, in order to prolong the service life of the connecting block 14, the connecting block 14 is provided with an anti-corrosion zinc coating.

The function of anticorrosive galvanizing coat is to promote the rust-resistant ability of connecting block 14, prolongs the life of connecting block 14.

Preferably, in order to improve the heat dissipation effect, the driven plate 9 is connected with the inner wall of the main body 1 in a sliding and sealing manner, three auxiliary holes are formed in the driven plate 9, the auxiliary holes correspond to the movable rods 12 one to one, the axis of each auxiliary hole is parallel to the axis of the transmission shaft 5, and 2 times of the distance between the axis of each auxiliary hole and the axis of the transmission shaft 5 is greater than the diameter of the driving plate 6.

The rotation of driven plate 9 drives the auxiliary hole and rotates, and when the air that is close to drilling rod 3 one side of driven plate 9 was carried to the opposite side of driven plate 9 from the auxiliary hole, can make the spiral helicine conveying track of formation of air in main part 1, can promote the interior air-driven heat of main part 1 and flow the degree of consistency, promote main part 1 radiating effect.

The user holds the handle 2, then, one end of the drill rod 3, which is far away from the main body 1, is pressed against a workpiece, the main body 1 is pushed by the handle 2 to move towards the direction close to the workpiece, so that the driving disc 6 and the driven disc 9 can be attached, the movement of the main body 1 drives the supporting block 11 to synchronously move, the spring 13 is stretched, the driving motor 24 is started, the driving gear 25 drives the driven gear 26 to rotate, the rotation of the driven gear 26 drives the rotating shaft 7 to rotate under the supporting effect of the first bearing 8, the rotation of the rotating shaft 7 drives the driving disc 6 to rotate, the rotation of the driving disc 6 drives the driven disc 9 to rotate through friction force, and the balls 10 slide in the annular groove, here, the effect of supporting the rotation of the driven disc 9 can be achieved through the matching of the balls 10 and the annular groove, and meanwhile, the rotation of the driven disc 9 enables the transmission, that is, drilling can be realized, and, through the relative movement between the main body 1 and the driven plate 9, the connecting block 14 drives the ball screw bearing 18 to move on the screw rod 17, because the ball screw bearing 18 is a bearing converting the rotary motion into the linear motion, or converting the linear motion into the rotary motion, thereby the screw rod 17 can be rotated, the rotation of the screw rod 17 drives the connecting shaft 19 to rotate under the supporting action of the second bearing 20, the rotation of the connecting shaft 19 drives the sealing disc 23 to realize the synchronous movement, and the sealing disc 23 is separated from the air inlet hole, during the period, the rotation of the rotating shaft 7 drives the fan blade 15 to rotate, thereby the air in the main body 1 is discharged from the air outlet hole, and the air outside the main body 1 is conveyed into the main body 1 from the air inlet pipe 21, here, through the circulation of the air in the main body 1 and the air outside the main body 1, the heat in, and, can suck the piece that produces during drilling into the trachea 21 and realize holding back through the filter screen under the effect of air current, after drilling finishes, make drilling rod 3 and work piece separation, make connecting block 14 towards keeping away from driving-disc 6 direction removal under the elastic action of spring 13, the removal of connecting block 14 loops through movable rod 12 and ball 10 drive driven disc 9 and driving-disc 6 separation, can make driven disc 9 stall, prevent that the rotation of drilling rod 3 from causing the injury to the human body, the security has improved, and, through the separation of driven disc 9 and driving-disc 6, can drive ball screw bearing 18 and realize resetting on lead screw 17, thus can make lead screw 17 counter-rotating, and make sealed dish 23 block up the inlet port, prevent that the piece from taking place to leak.

Compared with the prior art, this electric tool that factor of safety is high has realized driving drilling rod 3 pivoted function through actuating mechanism, compare with current actuating mechanism, this actuating mechanism can make drilling rod 3 be in stall state during not drilling, drilling rod 3 under the prevention rotation state causes the injury to the human body, the security is higher, moreover, this actuating mechanism has still realized the integral type linkage structure with heat dissipation mechanism, the practicality is stronger, moreover, radiating function has still been realized through heat dissipation mechanism, compare with current heat dissipation mechanism, this heat dissipation mechanism has still realized collecting the clastic function of production during drilling, and, after drilling finishes, stop up the inlet port through sealed dish 23, can also prevent that the piece from leaking from the water pipe, the practicality is stronger.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.