Driving tool

Abstract

The invention provides a driving tool. The driving tool (1) is provided with a main motor (20), and the main motor (20) is a driving source for generating power for moving the driver in the driving direction. The driving tool (1) is provided with a main body housing (11), and the main body housing (11) is used for accommodating a main motor (20). The driving tool (1) is provided with a sub-motor (51), and the sub-motor (51) is accommodated in the main body housing (11) and is driven independently of the main motor (20). The driving tool (1) is provided with a fan (52), and the fan (52) is installed on an output shaft (51a) of the auxiliary motor (51). Therefore, the electric device can be efficiently cooled.

Description

Technical Field

[0001] The present invention relates to a driving tool for driving a driving element into a material to be driven. Background Art

[0002] In Patent Documents 1 and 2, a gas spring type driving tool that uses the thrust of compressed gas as the driving force is disclosed. The driving tool has a driver for striking the driving element, a lifting mechanism for moving the driver to the standby position or the top dead center, and a motor as a driving source of the lifting mechanism. The driving tool has a controller for controlling the driving of the motor. The motor, the controller, etc. are installed inside the main body housing of the driving tool. A fan that rotates integrally is installed on the output shaft of the motor. Cooling air flowing inside the main body housing is generated by the rotation of the fan. The cooling air cools electrical components such as the motor and the controller, for example.

[0003] The motor of the driving tool is only driven when moving the driver to the standby position or moving the driver to the top dead center. Therefore, the driving time of the motor is short. Therefore, the time for the fan that rotates integrally with the output shaft of the motor to generate cooling air is also short. Therefore, sometimes the electrical components cannot be sufficiently cooled. In the driving tool, in addition to the motor and the controller, for example, electrical components with a large amount of heat generation such as a solenoid are sometimes provided. There is room for improvement in the cooling structure of the driving tool so as to be able to cool electrical components including those with a large amount of heat generation. [Prior Art Documents] [Patent Documents]

[0004] Patent Document 1: Japanese Patent Application Laid-Open No. 2023-64259 Patent Document 2: International Publication No. 2018 / 198670 Summary of the Invention [Technical Problem to be Solved by the Invention]

[0005] Therefore, a driving tool that can efficiently cool electrical components is needed. [Technical Solution for Solving the Technical Problem]

[0006] According to a feature of the present invention, the driving tool has a main motor, which is a driving source that generates power for moving the driver in the driving direction. The driving tool has a main body housing for housing the main motor. The driving tool has a sub-motor, which is housed in the main body housing and is driven independently of the main motor. The driving tool has a fan, which is installed on the output shaft of the sub-motor.

[0007] Therefore, the sub-motor is driven independently of the drive of the main motor. Accordingly, the sub-motor can be driven for a longer time than the drive time of the main motor to rotate the fan. Accordingly, cooling air can be supplied to electrical components such as the main motor and the sub-motor disposed in the main body housing for a sufficient time. Thereby, the electrical components in the main body housing can be efficiently cooled. Description of the Drawings

[0008] Figure 1 is a perspective view of the driving tool according to the first embodiment. Figure 2 is a right view of the driving tool with the right housing removed. Figure 3 is a cross-sectional view of the driving tool when the driver is in the standby position, as viewed from the right side. Figure 4 is a left view of the driving tool with the left housing removed. Figure 5 is a right view of the driving tool with the right housing removed. Figure 6 is a longitudinal cross-sectional view of the tool body when the driver is in the standby position. Figure 7 is a longitudinal cross-sectional view of the tool body when the driving piece is loaded into the driving passage. Figure 8 is an enlarged right view of the driving tool with the right housing and the driver guide removed when the driver is in the standby position. Figure 9 is an enlarged right view of the driving tool with the right housing and the driver guide removed when the solenoid is in the on state. Figure 10 is an enlarged right view of the driving tool with the right housing and the driver guide removed when the driving piece is loaded into the driving passage. Figure 11 is an enlarged bottom view of the driving tool with the right housing and the driver guide removed when the driver is in the standby position. Figure 12 is an enlarged bottom view of the driving tool with the right housing and the driver guide removed when the solenoid is in the on state. Figure 13 is an enlarged bottom view of the driving tool with the right housing and the driver guide removed when the driving piece is loaded into the driving passage. Figure 14 is a perspective view of the solenoid, the power transmission member, and the conveying claw. Figure 15 is a right view of the driving tool with the right housing of the driving tool according to the second embodiment removed. Figure 16 is a left view of the driving tool with the left housing removed. [Description of Reference Numerals]1: Driving tool; 2: Head of the driving machine; 2a, 2b: Driving passages; 2c: Ejection port; 3: Contact arm; 3a: Connecting part of the adjusting device; 4: Guide for the driver; 4a: Conveyor guide part; 4b: Hole; 5: Handle; 6: Trigger; 6a: Trigger switch; 7: Battery mounting part; 7a: Air inlet; 8: Battery; 9: Controller; 10: Tool body; 11: Main body housing; 12: Mechanism housing (motor housing); 12a: Main motor housing chamber; 12b: Solenoid housing chamber; 12c: First wall; 12d: Second wall; 12e: Air inlet; 12f: First exhaust port; 12g: Second exhaust port; 12h: Communication path; 12i: Sub-motor housing chamber; 12j: Tapered surface; 12k: Hole; 12m: Gear part housing chamber; 12n: Lifter housing chamber; 12p: Window part; 13: Cylinder; 14: Accumulator chamber; 14a: Air chamber; 15: Piston; 16: Driver; 16a: Rack teeth (engaged part); 16b: Tip; 17: Ram; 17a: Arc-shaped surface; 18: Buffer; 20: Main motor; 20a: Output shaft; 20b: Bearing; 21: Fan; 22: Planetary gear mechanism; 23: Lifting mechanism; 24: Wheel part; 25: Engaging part; 25a: Final engaging part; 26: Magazine; 26a: Right part; 26b: Left part; 26c: Support shaft; 26d: Spring receiving part; 30: Conveyor mechanism; 31: Conveyor claw; 31a: Conveyor inclined surface; 31b: Receiving surface; 31c: Rotating support shaft; 31d: Torsion spring; 32: Compression spring (biasing member); 33: Check claw; 33a: Check inclined surface; 33b: Rotating support shaft; 34: Nail guide member; 34a: Hole; 35: Power transmission member; 35a: Rotating support part; 35b: Plunger connecting part; 35c: Claw connecting part; 35d: Spring receiving part; 35e: Thick wall part; 36: Solenoid; 36a: Plunger; 36b: Coil; 36c: Retaining member; 41: Adjusting device; 41a: Rotating shaft; 41b: Compression spring; 42: Contact plate; 43: Spring; 44: Switch; 44a: Protruding pin; 51: Sub-motor; 51a: Output shaft; 51b: Bearing; 52: Fan; 53: Cover; 60: Driving tool; 61: Mechanism housing (motor housing); 61a: Main motor housing chamber; 61b: Solenoid housing chamber; 61c: First wall; 61d: Second wall; 61e: First air inlet; 61f: Second air inlet; 61g: Exhaust port; 61h: Communication path; 61i: Sub-motor housing chamber; 61j: Tapered surface; 61k: Through hole; 61m: Gear part housing chamber; 61n: Lifter housing chamber; N: Connecting driving piece; n: Driving piece; na: Head; m: Connecting part (wire); W: Material to be driven; C1: Lower position; C2: Upper position; J, K: Output axis lines; A1: Air passage (solenoid cooling passage); A2: Air passage (motor cooling passage); A3: Air passage (controller cooling passage). Detailed implementation mode

[0009] According to another feature of the present invention, the driving tool has a controller. Even when the main motor stops, the controller sends a driving signal to the auxiliary motor to drive the auxiliary motor. Therefore, by driving the auxiliary motor even when the main motor stops, the time for the cooling air to cool the electrical components can be extended. Therefore, the electrical components can be sufficiently cooled.

[0010] According to another feature of the present invention, the driving time of the auxiliary motor is longer than the driving time of the main motor when the driver performs a punching action for one cycle. Therefore, by making the driving time of the auxiliary motor longer than that of the main motor, the cooling efficiency of the electrical components cooled by the cooling air can be improved.

[0011] According to another feature of the present invention, the driving tool has a nail magazine for accommodating the driving pieces. The driving tool has a driver guide that supplies the driving pieces from the nail magazine and guides the driver in a movable manner. The auxiliary motor is arranged between the main motor and the nail magazine. Therefore, the auxiliary motor can be compactly arranged between the main motor and the nail magazine. The arrangement of the nail magazine relative to the main body housing is set according to the position where the driving pieces are supplied into the driver guide. Therefore, a gap needs to be provided between the main motor and the nail magazine. By arranging the auxiliary motor using this gap, the driving tool can be compactly arranged. In addition, the auxiliary motor can be arranged near the main motor. Therefore, the cooling efficiency of cooling the main motor by driving the auxiliary motor can be improved.

[0012] According to another feature of the present invention, the driving tool has a conveying claw that supplies the driving pieces from the nail magazine to the driver guide. The driving tool has a solenoid that moves the conveying claw in a direction opposite to the conveying direction. The solenoid is arranged between the main motor and the nail magazine. Therefore, the solenoid is arranged using the gap between the main motor and the nail magazine. Accordingly, the driving tool can be compactly arranged. In addition, the solenoid can be arranged near the auxiliary motor. Therefore, the cooling efficiency of cooling the solenoid by driving the auxiliary motor can be improved.

[0013] According to another feature of the present invention, the solenoid has a cylindrical holding member that houses the coil. A solenoid cooling passage is provided in the main body housing. The solenoid cooling passage is configured such that the air flows between the coil and the inner peripheral surface of the holding member by driving the auxiliary motor. Therefore, the solenoid cooling passage can be arranged in direct contact with the coil. And the heated cooling air can be made to flow away from the coil quickly. Therefore, the coil can be efficiently cooled.

[0014] According to another feature of the present invention, the output shaft of the sub-motor extends in a direction that intersects the extending direction of the output shaft of the main motor and intersects the driving direction of the driving member. Therefore, by making the output shaft of the sub-motor intersect with the output shaft of the main motor, the sub-motor including the fan can be arranged compactly relative to the main motor. By making the output shaft of the sub-motor intersect with the driving direction of the driving member, it is possible to suppress the enlargement of the driving tool in the driving direction. Therefore, the sub-motor can be arranged compactly.

[0015] According to another feature of the present invention, the output shaft of the main motor does not have a fan. A motor cooling passage is provided in the main body housing, and the motor cooling passage is such that the wind flows toward the main motor by driving the sub-motor. Therefore, in either case where the main motor is in a driving state or a stopped state, the main motor can be cooled by the sub-motor. Therefore, the cooling efficiency of the main motor can be improved. In addition, by not providing a fan on the output shaft of the main motor, the load on the main motor can be reduced.

[0016] According to another feature of the present invention, the driving tool has a controller, and the controller sends driving signals to the main motor and the sub-motor. A controller cooling passage is provided in the main body housing, and the controller cooling passage is such that the wind flows toward the controller by driving the sub-motor. Therefore, in either case where the main motor is in a driving state or a stopped state, the controller can be cooled by the sub-motor. Therefore, the cooling efficiency of the controller can be improved.

[0017] According to another feature of the present invention, a plurality of cooling passages are provided in the main body housing, and the plurality of cooling passages are such that the wind flows by driving the sub-motor. An exhaust port for exhausting the wind flowing in the plurality of cooling passages is provided in the main body housing. The exhaust port is shared by the plurality of cooling passages. Therefore, by sharing the exhaust port, the flow of the wind in the plurality of cooling passages can be made smooth and the turbulence is small. Accordingly, a plurality of electrical components can be cooled efficiently. In addition, the exhaust can be performed from the shared exhaust port without impairing the usability of the user holding the driving tool.

[0018] According to another feature of the present invention, the driving tool has a piston, and the piston is connected to the driver. The driving tool has a cylinder, and the piston is movably arranged in the cylinder. By the main motor, the driver is returned in a direction opposite to the driving direction, and the air pressure in the cylinder is increased. Therefore, in a so-called air spring type driving tool, the cooling efficiency of cooling electrical components such as the main motor by driving the sub-motor can be improved.

[0019] Next, according to Figures 1 to 14The first embodiment of the present invention is described. As an example of a driving tool 1, a gas spring type driving tool that uses the gas pressure of a pressure storage chamber as a thrust for driving a driven part is shown. In the following description, the driving direction of the driven part is defined as the downward direction, and the direction opposite to the driving direction is defined as the upward direction. The user of the driving tool 1 is located at Figure 1 The right side of the tool 1 is roughly driven into the middle. The front side close to the user is set as the rear direction, and the back side opposite to the front side is set as the front direction. The left and right directions are based on the user.

[0020] like Figure 2 , Figure 3 As shown, the driving tool 1 has a tool body 10 and a main body shell 11 covering the tool body 10. A cylinder 13 extending in the up-down direction is accommodated in the main body shell 11. A piston 15 is accommodated in the cylinder 13 in a manner that it can reciprocate up and down. A driving tool 16 that is long in the up-down direction is connected to the lower surface of the piston 15. A pressure storage chamber 14 is connected to the upper end of the cylinder 13. Compressed gas such as air is sealed in the pressure storage chamber 14. The air pressure of the pressure storage chamber 14 acts as a thrust for applying force to the upper surface of the piston 15 to move it downward.

[0021] like Figure 6 , Figure 7 As shown, the right part of the pressure accumulation chamber 14 is connected to the air chamber 14a extending downward. The air chamber 14a extends downward along the right side of the cylinder 13. The air chamber 14a overlaps with the lifting mechanism 23 described later in the left-right direction and is arranged above the lifting mechanism 23. By arranging the air chamber 14a on the right side of the cylinder 13, the capacity of the pressure accumulation chamber 14 including the air chamber 14a can be increased while suppressing the enlargement of the tool body 10 in the vertical direction.

[0022] like Figures 1 to 7 As shown, a driver head 2 is provided at the lower part of the tool body 10. The driver head 2 has a driver guide 4 extending approximately in the up-down direction. Inside the driver guide 4, driver passages 2a and 2b extending in the up-down direction are provided. The driver passage 2b on the upper side and the driver passage 2a on the lower side are connected to each other. The driver passage 2b on the upper side is formed into a substantially rectangular shape with a size that allows the driver 16 to be inserted in the up-down direction. The upper end of the driver passage 2b on the upper side is connected to the lower part of the cylinder 13. The driver passage 2a on the lower side is formed into a substantially cylindrical shape that is enlarged than the driver passage 2b on the upper side. The driver passage 2a on the lower side is provided with a diameter substantially the same as that of the substantially cylindrical hammer 17 mounted on the top end (lower end) 16b of the driver 16 or a diameter slightly larger than that. The lower end of the driver passage 2a on the lower side opens downward as an ejection port 2c.

[0023] like Figures 2 to 7As shown, the head 2 of the driving machine has a contact arm 3 that abuts against the material W to be driven. The contact arm 3 can move in the vertical direction between a lower position C1 and an upper position C2 relative to the driver guide 4. The contact arm 3 is biased downward to the lower position C1 by a compression spring 41b provided at the front of the tool body 10. In a state where the lower end of the contact arm 3 abuts against the material W to be driven, the tool body 10 is further moved closer to the material W to be driven. Accordingly, the contact arm 3 is pressed by the material W to be driven and moves from the lower position C1 to the upper position C2. The lower end of the contact arm 3 moves to a position substantially the same as the ejection port 2c when at the upper position C2.

[0024] As Figure 6 , Figure 7 shown, the lower part of the driver 16 enters the driving passages 2a, 2b. The driver 16 moves downward by the air pressure in the accumulator chamber 14 acting on the upper surface of the piston 15. The ram 17 mounted at the tip 16b of the driver 16 strikes the head na of one driving element n loaded in the driving passage 2a when moving toward the driving position. The struck driving element n moves downward within the driving passage 2a and is ejected from the ejection port 2c. The ejected driving element n is driven into the material W to be driven. Inside the lower side of the cylinder 13, a substantially cylindrical buffer 18 for absorbing the impact at the bottom dead center of the piston 15 is provided.

[0025] As Figure 6 , Figure 7 shown, on the right side portion of the driver 16, a plurality of rack teeth (engaging portions) 16a protruding to the right are provided. In this embodiment, six rack teeth 16a are arranged in the vertical direction as the longitudinal direction of the driver 16. When viewed from the front, each rack tooth 16a is provided in a substantially triangular shape with the bottom facing downward as the driving direction. The bottom of the rack tooth 16a engages with the engaging portion 25 of the lifting mechanism 23.

[0026] As Figures 1 to 4 shown, at the rear of the tool body 10, a grip 5 extending rearward for the user to hold is provided. On the lower surface of the front part of the grip 5, a trigger 6 for the user to operate by pressing with a fingertip is provided. Inside the grip 5, a trigger switch 6a that switches from an off state to an on state in response to the pressing operation of the trigger 6 is provided. When the head 2 of the driving machine is pressed by the material W to be driven and moves from the lower position C1 to the upper position C2 (refer to Figure 7 ), the pressing operation of the trigger 6 becomes effective.

[0027] As Figures 1 to 4As shown, a battery mounting portion 7 extending in the vertical direction is provided on the rear surface of the grip 5. A battery 8 can be detachably mounted on the battery mounting portion 7. The battery 8 can be removed from the battery mounting portion 7 and repeatedly charged using a separately prepared charger for use. The battery 8 can be used as a power source for other power tools. The battery 8 supplies power to the main motor 20 and the like described later.

[0028] As Figures 2 to 4 shown, a controller 9 that mainly controls the driving of the main motor 20 is housed in the battery mounting portion 7. The controller 9 has a control board housed in a shallow-bottomed rectangular box-shaped housing. The controller 9 is disposed in front of the battery 8 provided in the battery mounting portion 7. The controller 9 is arranged in a posture where the longest side extends substantially in the vertical direction and the shortest side extends substantially in the front-rear direction. An air inlet 7a that penetrates the inside and outside of the battery mounting portion 7 is provided on the upper surface of the battery mounting portion 7 and above the controller 9.

[0029] As Figures 1 to 4 shown, the main body housing 11 has a substantially cylindrical mechanism housing (motor housing) 12 extending in the front-rear direction below the grip 5. The rear portion of the mechanism housing 12 is connected to the lower portion of the battery mounting portion 7. A main motor housing chamber 12a for housing the main motor 20 is provided at the rear portion of the mechanism housing 12. A gear housing chamber 12m for housing the planetary gear mechanism 22 is provided in front of the main motor housing chamber 12a. First exhaust ports 12f that penetrate the inside and outside are provided on the left and right side surfaces of the gear housing chamber 12m. An elevator housing chamber 12n for housing the elevating mechanism 23 is provided in front of the gear housing chamber 12m. The main motor housing chamber 12a, the gear housing chamber 12m, and the elevator housing chamber 12n are arranged along the extending direction of the output axis J extending in the front-rear direction. The grip 5, the battery mounting portion 7, and the mechanism housing 12 cooperate to form an annular shape.

[0030] As Figures 2 to 4 shown, the mechanism housing 12 has a solenoid housing chamber 12b below the main motor housing chamber 12a and the gear housing chamber 12m. A solenoid 36 described later is housed in the solenoid housing chamber 12b. The mechanism housing 12 has a sub-motor housing chamber 12i below the main motor housing chamber 12a and the gear housing chamber 12m and behind the solenoid housing chamber 12b. A sub-motor 51 described later is housed in the sub-motor housing chamber 12i.

[0031] As Figure 2 , Figure 4As shown, the solenoid housing chamber 12b and the sub-motor housing chamber 12i communicate with each other. The solenoid housing chamber 12b and the sub-motor housing chamber 12i are divided in the vertical direction with respect to the main motor housing chamber 12a and the gear portion housing chamber 12m by the lower surfaces of the main motor housing chamber 12a and the gear portion housing chamber 12m. The rear portion of the solenoid housing chamber 12b communicates with the main motor housing chamber 12a via the sub-motor housing chamber 12i through a communication path 12h provided behind the main motor housing chamber 12a. The lower portion of the battery mounting portion 7 also communicates with the main motor housing chamber 12a and the sub-motor housing chamber 12i via the communication path 12h. The main motor housing chamber 12a communicates with the gear portion housing chamber 12m in the front-rear direction.

[0032] As Figures 1 to 4 shown, the solenoid housing chamber 12b is provided in a substantially rectangular box shape. The solenoid 36 is housed in the front portion of the solenoid housing chamber 12b. The plunger 36a of the solenoid 36 extends along a direction inclined forward and downward with respect to the output axis J. The solenoid housing chamber 12b has a first wall 12c on the front side facing the stapling machine head 2 and a second wall 12d on the lower side facing the nail magazine 26 described later. The plunger 36a projects from the center of the first wall 12c to the outside of the solenoid housing chamber 12b. An air inlet 12e that penetrates the inside and outside of the solenoid housing chamber 12b is provided in the second wall 12d. The air inlet 12e is arranged in an up-and-down arrangement with the solenoid 36. The specific structure of the solenoid 36 will be described in detail later.

[0033] As Figure 2 , Figure 3 shown, the main motor 20 has an output shaft 20a extending in the front-rear direction on the output axis J. The rear portion of the output shaft 20a is rotatably supported by a bearing 20b. The front portion of the output shaft 20a is rotatably supported by a bearing (not shown) inside the planetary gear mechanism 22. A fan 21 is mounted in front of the output shaft 20a and behind the planetary gear mechanism 22. The fan 21 rotates integrally with the output shaft 20a, whereby cooling air flows from the rear to the front in the main motor housing chamber 12a. The planetary gear mechanism 22 uses a three-row planetary gear train. The rotational drive of the output shaft 20a of the main motor 20 is decelerated by the planetary gear mechanism 22 and then transmitted to the lifting mechanism 23.

[0034] As Figure 6 , Figure 7As shown, the lifting mechanism 23 is provided on the right side of the head 2 of the driving machine. The lifting mechanism 23 moves the driver 16 and the piston 15 upward against the air pressure in the accumulator chamber 14. The lifting mechanism 23 has a wheel portion 24 that can rotate about the output axis J. The wheel portion 24 can rotate in the counterclockwise rotation direction when viewed from the front, and the rotation in the clockwise rotation direction is restricted. A plurality of engaging portions 25 are provided along the outer peripheral edge of the wheel portion 24. In this embodiment, for example, six engaging portions 25 are arranged at intervals in the circumferential direction of the wheel portion 24. The engaging portion 25 is, for example, a cylindrical pin extending in the front-rear direction. By rotating the wheel portion 24, each engaging portion 25 moves around the output axis J.

[0035] As Figure 6 , Figure 7 shown, the left part of the wheel portion 24 enters the driving passage 2b of the driver guide 4 through a window portion 12p provided in the left part of the lifter housing chamber 12n. Each engaging portion 25 of the wheel portion 24 engages with the bottom of the rack teeth 16a of the driver 16 in the driving passage 2b. In a state where at least one of the engaging portions 25 engages with the bottom of any one of the rack teeth 16a, the wheel portion 24 rotates in the counterclockwise rotation direction when viewed from the front. Accordingly, the driver 16 and the piston 15 move upward. Since the piston 15 moves upward, the air pressure in the accumulator chamber 14 increases.

[0036] As Figure 4 shown, a dial-type adjusting device 41 is provided at the front of the head 2 of the driving machine. The adjusting device 41 has a rotating shaft 41a extending in the vertical direction. The rotating shaft 41a can rotate integrally with the adjusting device 41 and can move in the vertical direction. An adjusting device connecting portion 3a connected to the adjusting device 41 is provided at the upper part of the contact arm 3. The contact arm 3 can move integrally with the adjusting device 41 in the vertical direction. By rotating the adjusting device 41 about the axis, the vertical position of the contact arm 3 can be adjusted. The adjusting device 41 has a compression spring 41b disposed on the outer peripheral side of the rotating shaft 41a and supported by the main body housing 11. The compression spring 41b biases the adjusting device 41 and the contact arm 3 downward. Therefore, the contact arm 3 is always located at the lower position C1.

[0037] As Figure 4 shown, a contact plate 42 is integrally connected to the upper part of the adjusting device 41. A plate-shaped spring 43 and a switch 44 are provided above the contact plate 42. When the contact arm 3 moves from the lower position C1 to the upper position C2 (refer to Figure 7)When moving, the contact plate 42 also moves upward through the adjusting device 41. The upper end of the contact plate 42 presses the protruding pin 44a of the switch 44 through the spring 43. Accordingly, the switch 44 becomes in the on state and sends an on signal to the controller 9. When the on signal is sent to the controller 9, the trigger operation of the trigger 6 becomes effective. When the contact arm 3 is in the lower position C1, the contact plate 42 does not move upward and does not press the protruding pin 44a of the switch 44. Therefore, the switch 44 does not send an on signal, and the trigger operation of the trigger 6 is ineffective.

[0038] As Figures 1 to 4 shown, a substantially cylindrical nail magazine 26 is provided behind the head 2 of the stapler. The nail magazine 26 is arranged in a posture such that the axial direction of the substantially cylindrical shape is substantially in the vertical direction. The nail magazine 26 is arranged in a split structure of a right part 26a and a left part 26b. A support shaft 26c is provided between the left end of the lower surface of the right part 26a and the right end of the lower surface of the left part 26b. The left part 26b can rotate around the support shaft 26c relative to the right part 26a to open and close. By opening the left part 26b, a plurality of connecting staples N connected with the staples n can be loaded into the nail magazine 26. By closing the left part 26b, the connecting staple N can be held in the nail magazine 26. The driver guide 4 has a flat conveying guide portion 4a extending rearward from the head 2 of the stapler. The front portion of the right part 26a of the nail magazine 26 is connected and supported on the conveying guide portion 4a. The rear portion of the right part 26a of the nail magazine 26 is connected and supported in a region behind the mechanism housing 12 of the main body housing 11.

[0039] As Figures 8 to 10 shown, the connecting staple N, which is a so-called coil nail, has a plurality of staples n and a connecting member m connecting the respective staples n. The staple n is, for example, a nail with a round head na. The connecting member m is, for example, a wire made of metal. The connecting member m connects a plurality of staples n in a state arranged at a predetermined interval in a direction substantially orthogonal to the length direction. The connecting staple N is accommodated in the nail magazine 26 in a state of being wound into a spiral shape. The staple n at one end of the connecting staple N is guided forward from the nail magazine 26 and is held by a conveying mechanism 30 provided between the nail magazine 26 and the head 2 of the stapler.

[0040] As Figures 8 to 13 shown, the conveying mechanism 30 has a conveying claw 31 that conveys the staple n forward toward the driving passage 2a. The conveying mechanism 30 has a biasing member 32 that biases the conveying claw 31 forward. The biasing member 32 is, for example, a coil-shaped compression spring. At the front portion of the right part 26a of the nail magazine 26, a spring receiving portion 26d that holds the rear end of the compression spring 32 is provided. The conveying mechanism 30 has a solenoid 36 that moves the conveying claw 31. According to a signal from the controller 9, power is supplied to the solenoid 36 from the battery 8 or power is cut off (refer to Figure 2When the solenoid 36 is in the off state where the power supply is cut off, the conveying claw 31 is urged toward the front driving passage 2a by the compression spring 32. When the solenoid 36 is supplied with power and becomes in the on state, the conveying claw 31 overcomes the biasing force of the compression spring 32 and moves toward the rear nail magazine 26.

[0041] like Figure 2 As shown, the solenoid 36 is accommodated in the solenoid accommodation chamber 12b of the mechanism housing 12 arranged above the nail magazine 26. In other words, the solenoid 36 is not arranged in the nail magazine 26, and is not arranged in the conveying path of the driving member n formed between the nail magazine 26 and the front-back direction of the driving device guide 4.

[0042] like Figures 8 to 10 , Figure 14 As shown, the solenoid 36 has a rectangular box-shaped holder 36c and a plunger 36a protruding forward from the holder 36c. A through hole for inserting the plunger 36a is provided on the front surface of the holder 36c. The lower surface and the upper surface of the holder 36c are open. The holder 36c accommodates the coil 36b. The plunger 36a is inserted into the coil 36b. The coil 36b is adjacent to the air inlet 12e provided on the second wall 12d of the solenoid accommodating chamber 12b.

[0043] like Figures 8 to 10 , Figure 14 As shown in FIG. 1 , the conveying mechanism 30 includes a power transmission member 35 that is moved by the drive of a solenoid 36. The conveying claw 31 moves in the front-rear direction in conjunction with the movement of the power transmission member 35. The power transmission member 35 is provided as a plate-shaped member that extends substantially in the up-down direction. A rotation support portion 35a that serves as the rotation center of the power transmission member 35 is provided at the upper end of the power transmission member 35. The rotation support portion 35a is rotatably supported by the driver guide 4 via a shaft member that extends in the left-right direction.

[0044] like Figures 8 to 10 , Figure 14 As shown, at the lower end of the power transmission component 35, a claw connection portion 35c connected to the rear portion of the conveying claw 31 is provided. On the rear surface of the claw connection portion 35c, a spring receiving portion 35d is provided to receive the front end of the compression spring 32. The power transmission component 35 and the conveying claw 31 are urged forward by the compression spring 32 through the spring receiving portion 35d. The power transmission component 35 has a thick wall portion 35e at the rear of the claw connection portion 35c. The thick wall portion 35e is set to be thicker than the claw connection portion 35c in the front-to-back direction. By providing the thick wall portion 35e, the rigidity of the power transmission component 35 can be improved relative to the loading force of the compression spring 32 and the driving force of the solenoid 36.

[0045] like Figures 8 to 10 , Figure 14As shown, the power transmission member 35 has a plunger connection portion 35b connected to the front end of the plunger 36a. The plunger connection portion 35b is disposed in the middle of the rotary support portion 35a and the claw connection portion 35c in the vertical direction. For example, the distance from the rotary support portion 35a to the plunger connection portion 35b is approximately half of the distance from the rotary support portion 35a to the claw connection portion 35c. Therefore, the movement amount of the plunger 36a is approximately half of the movement amount of the conveying claw 31.

[0046] As Figures 10 to 14 shown, the left end of the conveying claw 31 is set to be substantially U-shaped. A conveying inclined surface 31a is provided at the front portion of the left end of the conveying claw 31. The conveying inclined surface 31a is set such that with the left rear as the vertical direction, it inclines forward as it approaches the left side. At the rear portion of the left end of the conveying claw 31, a receiving surface 31b facing the conveying inclined surface 31a is provided. The receiving surface 31b extends substantially horizontally in the left-right direction with the front as the vertical direction. The lower right portion of the conveying claw 31 is rotatably connected to the claw connection portion 35c of the power transmission member 35 by a rotary support shaft 31c extending in the vertical direction. The conveying claw 31 has a torsion spring 31d that applies a force to the conveying claw 31 about the axis of the rotary support shaft 31c. The torsion spring 31d applies a force to the conveying claw 31 in the clockwise rotation direction when viewed from below.

[0047] As Figures 8 to 13 shown, the conveying mechanism 30 has a check claw 33 that prevents the driving member n conveyed forward by the conveying claw 31 from returning rearward from the driving passage 2a. A check inclined surface 33a is provided at the front portion of the check claw 33. The check inclined surface 33a is set such that with the right rear as the vertical direction, it inclines forward as it approaches the right side. Between the driving passage 2a and the magazine 26 in the front-rear direction, a plate-shaped guide member 34 extending in the front-rear direction and the vertical direction is provided. The guide member 34 extends substantially parallel to the conveying guide portion 4a on the left side of the conveying guide portion 4a. The lower portion of the check claw 33 is rotatably connected to the guide member 34 by a rotary support shaft 33b extending in the vertical direction. The check claw 33 is biased in the counterclockwise rotation direction when viewed from below by a spring (not shown).

[0048] As Figure 1 shown, a conveying passage for conveying the driving member n from the magazine 26 to the driving passage 2a is formed between the conveying guide portion 4a and the guide member 34 in the left-right direction. The conveying claw 31 is inserted through a hole 4b that penetrates the conveying guide portion 4a in the left-right direction and protrudes from the right side to the left side toward the conveying passage. The check claw 33 is inserted through a hole 34a that penetrates the conveying guide portion 4a in the left-right direction and protrudes from the left side to the right side toward the conveying passage (see Figure 9 ).

[0049] As Figure 1 ,Figure 2 As shown, the sub-motor housing chamber 12i for housing the sub-motor 51 is provided in a substantially cylindrical shape with the left-right direction as the axis. The output shaft 51a of the sub-motor 51 extends in the left-right direction on an output axis K that is substantially orthogonal to the output axis J and also substantially orthogonal to the driving-in direction. The sub-motor 51 is provided in the vertical direction between the main motor 20 and the staple cartridge 26. Between the main motor 20 and the staple cartridge 26 in the vertical direction, an interval is required to set the moving amount of the driver 16 and to set the mechanism for loading the driving elements n. The sub-motor 51 is compactly arranged in the vertical direction using this interval. The sub-motor 51 protrudes to the right to such an extent that the right ends of the lifting mechanism 23 and the staple cartridge 26 are substantially aligned (refer to Figure 5 ). By suppressing the protruding amount of the sub-motor 51 protruding to the right, the driving tool 1 can be prevented from becoming large in the left-right direction. A bearing 51b is provided at the right end of the output shaft 51a of the sub-motor 51. A fan 52 is installed on the right part of the sub-motor 51 and on the left side of the bearing 51b.

[0050] As Figure 1 , Figure 2 shown, at the right end of the sub-motor housing chamber 12i, a disk-shaped cover 53 is installed so as to cover the right side of the fan 52. A second exhaust port 12g is provided between the sub-motor housing chamber 12i and the cover 53. The second exhaust port 12g is provided on the radial outside of the lower region of the fan 52. The exhausted gas is discharged downward from the second exhaust port 12g.

[0051] As Figure 4 shown, on the left side of the sub-motor housing chamber 12i, a conical surface 12j in a conical shape is provided so as to cover the left side of the fan 52. At the center of the conical surface 12j, a circular hole 12k penetrating in the left-right direction is provided. The solenoid housing chamber 12b and the sub-motor housing chamber 12i are communicated in the left-right direction through the hole 12k. By providing the conical surface 12j and the hole 12k, the wind force of the cooling air generated by the rotation of the fan 52 can be increased.

[0052] Next, with reference to Figures 3 to 13 , a series of processes of the driving action of the driving tool 1 will be described. Figure 3 , Figure 6 , Figure 8 , Figure 11 show the state in which the driver 16 is moved upward to the standby position and the state before loading the driving element n into the driving passage 2a. Figure 7 , Figure 10 , Figure 13The state when the driven part n is loaded into the driven passage 2a is shown. The driver 16 in the standby position stops at a position slightly below the top dead center. When the driver 16 is in the standby position, the bottom surface of the second rack tooth 16a from the bottom engages with the engaging portion 25 before the final engaging portion 25a of the lifting mechanism 23 (the counterclockwise rotation direction side in the figure).

[0053] The contact arm 3 moves from the lower position C1 to the upper position C2 when being pressed by the material W to be driven. The contact plate 42 connected to the adjustment device 41 moves upward in conjunction with the contact arm 3. The contact plate 42 moves upward, and the protruding pin 44a of the switch 44 is pressed via the spring 43. The switch 44 sends an on signal to the controller 9. The controller 9 receives the on signal from the switch 44 and starts the main motor 20 when the trigger 6 is pulled. When the main motor 20 is started, the wheel portion 24 of the lifting mechanism 23 rotates. Accordingly, the rack teeth 16a engaged with the engaging portion 25 move upward, and the driver 16 moves upward from the standby position to the top dead center.

[0054] While the driver 16 moves upward from the standby position toward the top dead center, the leading end of a driven piece n is loaded into the driving passage 2a by the conveying mechanism 30. Before the lower end of the hammer 17 mounted on the top end 16b of the driver 16 moves upward and is about to exceed the head na of the driven piece n (see Figure 9 ), supplying power to the solenoid 36. The plunger 36a moves backward together with the plunger connection portion 35b of the power transmission component 35. The power transmission component 35 rotates backward around the rotation support portion 35a. The conveying claw 31 moves backward in conjunction with the claw connection portion 35c of the power transmission component 35, overcoming the biasing force of the compression spring 32 and moving backward.

[0055] When the conveying claw 31 moves backward, the conveying inclined surface 31a of the conveying claw 31 is pressed by the driven piece n held therein. Therefore, the conveying claw 31 overcomes the biasing force of the torsion spring 31d and retreats to the right side away from the driven piece n. When the plunger 36a moves to the rearmost, the conveying claw 31 is biased by the torsion spring 31d and rotates to the left side where the driven piece n is located. Accordingly, the second driven piece n from the front is sandwiched between the conveying inclined surface 31a of the conveying claw 31 and the receiving surface 31b. The driven piece n at the front end is located at the rear near the hammer 17 and is held by the front surface of the non-return claw 33 so as not to move backward.

[0056] At the moment when the lower end of the hammer 17 moves upwards from the head na of the driven part n (refer to Figure 9) The power supply to the solenoid 36 is cut off. The power transmission member 35 is urged by the compression spring 32 and rotates forward about the rotary support portion 35a. The conveying claw 31 moves forward while holding the second driving member n from the front. The check claw 33 is pressed by the driving member n moving forward from the rear and retracts to the left away from the driving member n against the spring loading force. Therefore, the conveying claw 31 can smoothly move the connecting driving member N including the held driving member n forward. By moving the connecting driving member N forward, the foremost driving member n can be loaded into the driving passage 2a during the period until the driver 16 moves to the top dead center. The check claw 33 is urged by the spring and rotates to the right where the driving member n is located. Accordingly, the backward return of the connecting driving member N toward the magazine 26 side can be restricted.

[0057] When the driver 16 moves upward to the top dead center and reaches the state just before driving, the final engaging portion 25a is separated from the bottom of the lowermost rack tooth 16a by the rotation of the wheel portion 24. The driver 16 is urged downward by the air pressure applied to the accumulator chamber 14 of the piston 15. The ram 17 strikes the head na of the driving member n in the driving passage 2a. The struck driving member n is ejected from the ejection port 2c toward the material W to be driven. The connecting member m connecting the ejected driving member n is sheared due to the impact during the strike by the driver 16. When the driver 16 moves downward, all the engaging portions 25 retract to a position on the right side of the driving passage 2b. Therefore, interference between the rack tooth 16a of the downward-moving driver 16 and the engaging portion 25 is avoided, and a smooth driving operation can be completed.

[0058] The wheel portion 24 continues to rotate during the downward movement of the driver 16 and after reaching the bottom dead center. When the driver 16 is at the bottom dead center, if the wheel portion 24 rotates to a specified rotation angle, one of the engaging portions 25 engages with the bottom of the uppermost rack tooth 16a. Accordingly, the return operation for moving the driver 16 upward starts. The next driving member n of the ejected driving member n is sandwiched between the conveying inclined surface 31a and the receiving surface 31b of the conveying claw 31 and is held by the front surface of the check claw 33. Accordingly, the next driving member n is located behind and close to the driving passage 2a. An arcuate surface 17a imitating the shape of the head na of the driving member n is provided on the rear surface of the ram 17. Interference between the ram 17 and the head na of the next driving member n can be suppressed by the arcuate surface 17a. Therefore, the next driving member n can be held at a position as close as possible to the driving passage 2a.

[0059] When the wheel portion 24 rotates and one engaging portion 25 before the final engaging portion 25a engages with the bottom of the second rack tooth 16a from the bottom, the driver 16 returns to the standby position. For example, by appropriately measuring the time elapsed since the main motor 20 starts, or by appropriately measuring the rotational position of the wheel portion 24, the main motor 20 can be stopped at the stage when the piston 15 reaches the standby position. Accordingly, the driver 16 is held in the standby position. Accordingly, a series of driving operations ends.

[0060] Refer to Figure 2 、 Figure 4 to describe the flow of the cooling air in the main body housing 11. When the main motor 20 starts, the fan 21 rotates integrally with the output shaft 20a. Cooling air flowing from the rear to the front is generated in the main motor housing chamber 12a of the mechanism housing 12. Negative pressure is generated inside the battery mounting portion 7 by the rotation of the fan 21, causing the cooling air to flow. When the sub-motor 51 starts, the fan 52 rotates integrally with the output shaft. Cooling air flowing from the left to the right is generated in the sub-motor housing chamber 12i. By the rotation of the fan 52, negative pressure is generated inside the solenoid housing chamber 12b and the battery mounting portion 7, causing the cooling air to flow.

[0061] The sub-motor 51 is driven independently of the drive of the main motor 20. The timing of starting the sub-motor 51 can be set arbitrarily. For example, power can be supplied to the sub-motor 51 when the trigger 6 is pulled. For example, power can also be supplied to the sub-motor 51 when it is detected that the contact arm 3 moves to the upper position C2 (refer to Figure 7 ). For example, it can also be configured such that the power supply to the sub-motor 51 is cut off after a predetermined time has elapsed since the start of power supply. For example, when the main motor 20 performs one cycle of driving operation, the sub-motor 51 can be driven for a longer time than the main motor 20.

[0062] First, external air is inhaled as cooling air into the solenoid housing chamber 12b from the air inlet 12e of the second wall 12d. The cooling air passes between the coil 36b of the solenoid 36 (refer to Figure 14 ) and the inner peripheral surface of the holding member 36c to cool the coil 36b. The cooling air passes through the air passage (solenoid cooling passage) A1, and this air passage A1 flows through the hole 12k to the right rear sub-motor housing chamber 12i. The cooling air passing through the air passage A1 flows to the fan 52 and is discharged to the outside from the second exhaust port 12g as the fan 52 rotates.

[0063] First, the cooling air is inhaled as cooling wind from the air inlet 7a at the upper end into the interior of the battery mounting portion 7. The cooling wind passes near the controller 9 and through the air passage (controller cooling passage) A3 of the communication path 12h that flows downward. The controller 9 is cooled by the cooling wind passing through the air passage A3. The cooling wind passing through the air passage A3 flows into the sub-motor housing chamber 12i from the communication path 12h via the hole 12k. The cooling wind flowing into the sub-motor housing chamber 12i is discharged to the outside from the second exhaust port 12g by the rotation of the fan 52. A part of the cooling wind passing through the air passage A3 branches off in the communication path 12h and passes through the air passage (motor cooling passage) A2 that flows into the main motor housing chamber 12a. The main motor 20 is cooled by the cooling wind passing through the air passage A2. The cooling wind is discharged to the outside from the first exhaust port 12f of the gear portion housing chamber 12m.

[0064] As described above, as Figure 1 , 2 shown, the driving tool 1 has a main motor 20, and the main motor 20 is a drive source that generates power for moving the driver 16 (refer to Figure 6 , Figure 7 ) in the driving direction. The driving tool 1 has a main body housing 11 that houses the main motor 20. The driving tool 1 has a sub-motor 51, and the sub-motor 51 is housed in the main body housing 11 and is driven independently of the main motor 20. The driving tool 1 has a fan 52, and the fan 52 is mounted on the output shaft 51a of the sub-motor 51.

[0065] Therefore, the sub-motor 51 is driven independently of the driving of the main motor 20. Therefore, the sub-motor 51 can be driven to rotate the fan 52 for a longer time than the driving time of the main motor 20. Therefore, cooling wind can be supplied to electrical components such as the main motor 20 and the sub-motor 51 provided in the main body housing 11 for a sufficient time. Accordingly, the electrical components in the main body housing 11 can be efficiently cooled.

[0066] As Figure 2 shown, the driving tool 1 has a controller 9, and even when the main motor 20 stops, the controller 9 sends a driving signal to the sub-motor 51 so that the sub-motor 51 can be driven. Therefore, by driving the sub-motor 51 even when the main motor 20 stops, the time for the cooling wind to cool the electrical components can be extended. Therefore, the electrical components can be sufficiently cooled.

[0067] As Figures 8 to 10 shown, the driving time of the sub-motor 51 is longer than the driving time of the main motor 20 when driving the driver 16 for one cycle of the driving operation. Therefore, by making the driving time of the sub-motor 51 longer than that of the main motor 20, the cooling efficiency of the cooling wind for the electrical components can be improved.

[0068] As Figures 8 to 10As shown, the driving tool 1 has a nail magazine 26 that houses driving elements n. The driving tool 1 has a driver guide 4 that is supplied with driving elements n by the nail magazine 26 and that movably guides a driver 16. A sub-motor 51 is provided between the main motor 20 and the nail magazine 26. Accordingly, the sub-motor 51 can be compactly arranged between the main motor 20 and the nail magazine 26. The arrangement of the nail magazine 26 relative to the main body housing 11 is set according to the position where the driving elements n are supplied into the driver guide 4. Therefore, a space needs to be provided between the main motor 20 and the nail magazine 26. By arranging the sub-motor 51 using this space, the driving tool 1 can be compactly arranged. In addition, the sub-motor 51 can be arranged near the main motor 20. Therefore, the cooling efficiency of cooling the main motor 20 by driving the sub-motor 51 can be improved.

[0069] As Figure 2 , Figures 8 to 10 shown, the driving tool 1 has a feed pawl 31 that feeds driving elements n from the nail magazine 26 to the driver guide 4. The driving tool 1 has a solenoid 36 that moves the feed pawl 31 in a direction opposite to the feed direction. The solenoid 36 is provided between the main motor 20 and the nail magazine 26. Accordingly, the solenoid 36 is arranged using the space between the main motor 20 and the nail magazine 26. Thereby, the driving tool 1 can be compactly arranged. In addition, the solenoid 36 can be arranged near the sub-motor 51. Therefore, the cooling efficiency of cooling the solenoid 36 by driving the sub-motor 51 can be improved.

[0070] As Figure 2 shown, the solenoid 36 has a cylindrical holding member 36c that houses a coil 36b (see Figure 14 ). An air passage (solenoid cooling passage) A1 is provided in the main body housing 11, and the air passage A1 is such that, by driving the sub-motor 51, air flows between the coil 36b and the inner peripheral surface of the holding member 36c. Accordingly, the air passage A1 can be provided to directly contact the coil 36b. And the heated cooling air can be made to flow away from the coil 36b rapidly. Therefore, the coil 36b can be cooled efficiently.

[0071] As Figure 2 shown, the output shaft 51a of the sub-motor 51 extends in a direction that intersects the extending direction of the output shaft 51a of the main motor 20 and that intersects the driving direction of the driving elements n. Accordingly, by crossing the output shaft 51a of the sub-motor 51 with the output shaft 51a of the main motor 20, the sub-motor 51 including a fan 52 can be arranged compactly relative to the main motor 20. By crossing the output shaft 51a of the sub-motor 51 with the driving direction of the driving elements n, an increase in the size of the driving tool 1 in the driving direction can be suppressed. Therefore, the sub-motor 51 can be compactly arranged.

[0072] AsFigure 2 As shown, the driving tool 1 has a controller 9 that sends drive signals to the main motor 20 and the sub-motor 51. In the main body housing 11, an air passage (controller cooling passage) A3 is provided through which air flows by driving the sub-motor 51 to cool the controller 9. Therefore, the controller 9 can be cooled by the sub-motor 51 in either case when the main motor 20 is in the driving state or in the stopped state. Thus, the cooling efficiency of the controller 9 can be improved.

[0073] As Figure 6 、 Figure 7 shown, the driving tool 1 has a piston 15 that connects to the rammer 16. The driving tool 1 has a cylinder 13, and the piston 15 is movably disposed in the cylinder 13. The rammer 16 is returned in a direction opposite to the driving direction by the main motor 20, whereby the air pressure in the cylinder 13 is increased. Therefore, in the so-called air spring type driving tool 1, the cooling efficiency of electrical components such as the main motor 20 can be improved by driving the sub-motor 51.

[0074] Next, according to Figure 15 、 Figure 16 a second embodiment of the present invention will be described. In the main body housing 11 of the driving tool 60 of the second embodiment, instead of Figure 1 the mechanism housing 12 shown, a mechanism housing (motor housing) 61 is provided. In the following description, only the parts different from the first embodiment will be described in detail. The mechanism housing 61 is provided in a substantially cylindrical shape extending in the front-rear direction below the grip 5. The mechanism housing 61 has a main motor housing chamber 61a, a gear portion housing chamber 61m, a lifter housing chamber 61n, a solenoid housing chamber 61b, a sub-motor housing chamber 61i, and a communication path 61h. These structures are provided in the same manner as the main motor housing chamber 12a, the gear portion housing chamber 12m, the lifter housing chamber 12n, the solenoid housing chamber 12b, the sub-motor housing chamber 12i, and the communication path 12h of the mechanism housing 12 shown in Figure 2 the mechanism housing 12 shown.

[0075] As Figure 15 、 Figure 16As shown, the solenoid 36 is housed in the front part of a solenoid housing chamber 61b formed in a substantially rectangular box shape. The plunger 36a of the solenoid 36 extends in a direction inclined downward and forward with respect to the output axis J. The solenoid housing chamber 61b has a first wall 61c on the front side facing the driving machine head 2 and a second wall 61d on the lower side facing the staple magazine 26. The plunger 36a projects outward from the center of the first wall 61c to the outside of the solenoid housing chamber 61b. In the second wall 61d, a first air inlet 61e is provided that penetrates the inside and outside of the solenoid housing chamber 61b. The first air inlet 61e is arranged vertically with the solenoid 36. On the left and right sides of the gear portion housing chamber 61m, second air inlets 61f that penetrate the inside and outside are provided.

[0076] As Figure 15 , Figure 16 shown, the sub-motor housing chamber 61i is set in a substantially cylindrical shape with the left-right direction as the axis. The output shaft 51a of the sub-motor 51 extends in the left-right direction on an output axis K that is substantially orthogonal to the output axis J and also substantially orthogonal to the driving direction. A fan 52 is installed on the right part of the sub-motor 51 and on the left side of the bearing 51b. On the other hand, no fan is installed on the output shaft 20a of the main motor 20. At the right end of the sub-motor housing chamber 61i, a disc-shaped cover (not shown) that covers the right side of the fan 52 is installed. An exhaust port 61g is provided between the sub-motor housing chamber 61i and the cover. The exhaust port 61g is provided on the radially outer side of the lower region of the fan 52. The discharged gas is discharged downward from the exhaust port 61g.

[0077] As Figure 16 shown, on the left side of the sub-motor housing chamber 61i, a conical surface 61j is provided to cover the left side of the fan 52. In the center of the conical surface 61j, a circular hole 61k that penetrates in the left-right direction is provided. Through the hole 61k, the solenoid housing chamber 61b and the sub-motor housing chamber 61i communicate with each other in the left-right direction.

[0078] Refer to Figure 15 , Figure 16To illustrate the flow of the cooling air within the main body housing 11. When the sub-motor 51 is started, the fan 52 rotates integrally with the output shaft. Cooling air is generated from the left side to the right side within the sub-motor housing chamber 61i. On the other hand, since no fan is installed on the main motor 20, no cooling air is generated during the startup process of the main motor 20. By the rotation of the fan 52, a negative pressure is generated inside the solenoid housing chamber 61b and the battery mounting portion 7, causing the cooling air to flow. For example, when power is supplied to the solenoid 36, the sub-motor 51 is supplied with power and is driven independently of the main motor 20. For example, after a specified time has elapsed after cutting off the power supply to the solenoid 36, the power supply to the sub-motor 51 is cut off and the sub-motor 51 stops. For example, when the main motor 20 performs a punching operation for one cycle, the sub-motor 51 can be driven for a longer time than the main motor 20.

[0079] First, external air is inhaled as cooling air into the solenoid housing chamber 61b from the first air inlet 61e of the second wall 61d. The cooling air passes between the coil 36b (refer to Figure 14 ) of the solenoid 36 and the inner peripheral surface of the holding member 36c to cool the coil 36b. The cooling air passes through the air passage (solenoid cooling passage) A1, and this air passage A1 flows through the hole 61k to the sub-motor housing chamber 61i at the right rear side. The cooling air passing through the air passage A1 flows toward the fan 52 and is discharged to the outside from the exhaust port 61g as the fan 52 rotates.

[0080] First, external air is inhaled as cooling air into the main motor housing chamber 61a from the second air inlet 61f of the gear portion housing chamber 12m. The cooling air passes through the air passage (motor cooling passage) A2 of the communication path 61h that flows rearward from within the main motor housing chamber 61a. The main motor 20 is cooled by the cooling air passing through the air passage A2. The cooling air passing through the air passage A2 flows from the communication path 61h to the sub-motor housing chamber 61i via the hole 61k. The cooling air flowing into the sub-motor housing chamber 61i is discharged to the outside from the exhaust port 61g as the fan 52 rotates.

[0081] First, external air is inhaled as cooling air into the interior of the battery mounting portion 7 from the air inlet 7a at the upper end. The cooling air passes near the controller 9 and passes through the air passage (controller cooling passage) A3 of the communication path 61h that flows downward. The controller 9 is cooled by the cooling air passing through the air passage A3. The cooling air passing through the air passage A3 flows from the communication path 61h to the sub-motor housing chamber 61i via the hole 61k. The cooling air flowing into the sub-motor housing chamber 61i is discharged to the outside from the exhaust port 61g as the fan 52 rotates. In this way, the respective cooling air for cooling the solenoid 36, the main motor 20, and the controller 9 are all discharged from the common exhaust port 61g provided in the sub-motor housing chamber 61i.

[0082] As described above, asFigure 15 As shown, the output shaft 20a of the main motor 20 does not have a fan. In the main body housing 11, there is provided an air passage (motor cooling passage) A2 through which air flows toward the main motor 20 by driving the sub-motor 51 (see Figure 16 ). Therefore, in any case when the main motor 20 is in a driving state or a stopped state, the main motor 20 can be cooled by the sub-motor 51. Thus, the cooling efficiency of the main motor 20 can be improved. In addition, by not providing a fan on the output shaft 20a of the main motor 20, the load on the main motor 20 can be reduced.

[0083] As Figure 15 shown, in the main body housing 11, there are provided a plurality of cooling passages A1, A2, A3 through which air flows by driving the sub-motor 51. In the main body housing 11, there is provided an exhaust port 61g for exhausting the air flowing in the plurality of cooling passages A1, A2, A3. The exhaust port 61g is shared by the plurality of cooling passages A1, A2, A3. Therefore, by sharing the exhaust port 61g, the flow of air in the plurality of cooling passages A1, A2, A3 can be made smooth and the turbulence can be reduced. Accordingly, a plurality of electrical components can be efficiently cooled. In addition, exhaust can be performed from the shared exhaust port 61g without impairing the usability of the user holding the driving tool 60.

[0084] Various changes can be added to the driving tools 1, 50, 60, 70 of the above-described embodiments. A gas spring type driving tool is exemplified. As an alternative, for example, the present invention can also be applied to a mechanical spring type driving tool that uses a spring force such as a mechanical compression spring generated when the driver is moved in a direction opposite to the driving direction by a lifting mechanism. For example, the present invention can also be applied to a flywheel type driving tool that uses the inertial force of a flywheel to eject the driver. For example, the present invention can also be applied to an electro-pneumatic type driving tool that uses compressed air generated by rotating a crank by an electric motor.

[0085] The position where the sub-motor 51 is provided is not limited to the exemplified position and can be appropriately changed. For example, there are cases where it is difficult to arrange the sub-motor 51 between the main motor 20 and the nail magazine 26, cases where there is no solenoid 36 for guiding the driving member n to the driver guide 4, etc. In such cases, for example, the sub-motor 51 and the sub-motor housing chamber 12i can be provided near the communication path 12h below the controller 9 and behind the main motor 20. A structure in which the controller 9 is provided in front of the battery 8 in the battery mounting portion 7 is exemplified. As an alternative, for example, the controller 9 can be arranged near the sub-motor 51 to enter the solenoid housing chamber 12b. By bringing the controller 9 close to the sub-motor 51, the cooling effect of cooling the controller 9 by rotating the fan 52 by the sub-motor 51 can be improved.

[0086] For example, a sub-motor 51 can also be applied to a driving tool that does not require a solenoid 36 to convey the driving member n from the nail magazine 26 to the driving passage 2a. Even when the solenoid 36 is not provided, the driving time of the main motor 20 of the driving tool 1 is short. Therefore, the cooling effect of rotating the fan 52 by the sub-motor 51 is sufficient. In the case of the present invention where the solenoid 36 is provided, since the calorific value of the solenoid 36 is high, the cooling effect of the sub-motor 51 is more useful.

[0087] The structure in which the air inlet 12e is provided in the second wall 12d of the solenoid housing chamber 12b is illustrated. As an alternative, the air inlet may be provided in the first wall 12c, or in addition to this, the air inlet may be provided in the first wall 12c.

Claims

1. A driving tool, characterized in that: It has a main motor, a main body shell, an auxiliary motor and a fan, wherein: The main motor is a driving source that generates power for moving the driver in the driving direction; The main body shell is used to accommodate the main motor; The auxiliary motor is housed in the main housing and driven independently of the main motor; The fan is mounted on the output shaft of the auxiliary motor.

2. The driving tool according to claim 1, characterized in that A controller is provided, and the controller sends a driving signal to the sub-motor to drive the sub-motor even when the main motor is stopped.

3. The driving tool according to claim 1 or 2, characterized in that: The driving time of the auxiliary motor is longer than the driving time of the main motor when the driver is driven to perform one cycle of driving operation.

4. The driving tool according to any one of claims 1 to 3, characterized in that: It has a nail magazine and a driver guide, wherein: The nail magazine is used to accommodate the driven parts; The driver guide is supplied with the driver from the nail magazine and guides the driver in a movably manner. The auxiliary motor is arranged between the main motor and the nail magazine.

5. The driving tool according to claim 4, characterized in that With conveying claw and solenoid, The conveying claw supplies the driver from the nail magazine to the driver guide; The solenoid moves the conveying claw in a direction opposite to the conveying direction. The solenoid is disposed between the main motor and the nail magazine.

6. The driving tool according to claim 5, characterized in that The solenoid has a cylindrical holder that houses the coil. The main body case is provided with a solenoid cooling passage through which wind flows between the coil and the inner peripheral surface of the holder when the auxiliary motor is driven.

7. The driving tool according to any one of claims 1 to 6, characterized in that: The output shaft of the auxiliary motor extends in a direction intersecting with an extending direction of the output shaft of the main motor and intersecting with a driving direction of a driving tool.

8. The driving tool according to any one of claims 1 to 7, characterized in that: The output shaft of the main motor does not have a fan, The main body case is provided with a motor cooling passage, and the motor cooling passage allows air to flow toward the main motor when the auxiliary motor is driven.

9. The driving tool according to any one of claims 1 to 8, characterized in that: A controller is provided, wherein the controller sends a driving signal to the main motor and the auxiliary motor, The main body case is provided with a controller cooling passage, and the controller cooling passage allows air to flow toward the controller when the auxiliary motor is driven.

10. The driving tool according to any one of claims 1 to 9, characterized in that: The main body case is provided with a plurality of cooling passages through which wind flows when the auxiliary motor is driven, and an exhaust port through which the wind flowing through the plurality of cooling passages is exhausted, and the exhaust port is shared by the plurality of cooling passages.

11. The driving tool according to any one of claims 1 to 10, characterized in that: A piston and a cylinder, wherein The piston is connected to the driver; The piston is movably disposed in the cylinder. The main motor causes the driver to return in a direction opposite to the driving direction, thereby increasing the air pressure in the cylinder.

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