JP2016041405A - Caulking gun and electric tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve compactification.SOLUTION: In a caulking gun 1, an outer rotor type brushless motor 4 including a stator 32 and a rotor 33 which is disposed at the outer periphery side of the stator 32 and may rotate relative to the stator 32 is housed in a housing 2 so as to face the lateral side. A force is rotationally transmitted from an output gear provided at an outer periphery part of the rotor 33 to an output cylinder 58 of a rotation transmission part 5 to move an extruded rod 6 to the front side and thereby discharge a caulking agent.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a caulking gun and a power tool that use a motor as a drive source.

  The electric caulking gun can automatically eject the caulking agent by setting the cartridge filled with the caulking agent in the holder and moving the push rod forward by driving the motor to press the cartridge. it can. For example, as disclosed in Patent Document 1, this push rod moving mechanism is provided on a drive pulley provided on the output shaft of a motor arranged sideways and on an input shaft of a planetary gear reduction mechanism arranged in parallel with the motor. A belt is stretched between the driven pulley and a transmission state switching part is provided between the final carrier of the planetary gear speed reduction mechanism and the drive gear meshed with the rack of the push rod to reduce the rotation transmitted by the belt. Then, it is transmitted to the final carrier, and only the forward rotation of the motor is transmitted to the drive gear by the transmission state switching unit.

JP 2013-184117 A

  However, it is difficult to make the moving mechanism compact because of the size of the motor, the power transmission structure, and the like.

  Accordingly, an object of the present invention is to provide a caulking gun and a power tool that can be made compact.

In order to achieve the above object, a first aspect of the present invention is a caulking gun comprising a brushless motor having a stator and a rotor rotatable with respect to the stator, and the caulking agent is applied by rotation of the rotor. It can be discharged.
According to a second aspect of the present invention, in the configuration of the first aspect, the brushless motor is an outer rotor type in which a rotor is disposed on the outer peripheral side of the stator, and is capable of discharging a caulking agent by transmitting rotation from the outer peripheral portion of the rotor. It is characterized by being.
According to a third aspect of the present invention, in the configuration of the second aspect, the rotor is provided with a plurality of magnets, an output gear is formed on the outer peripheral portion, and the magnet and the output gear are arranged in the axial direction of the rotor. It is arrange | positioned in the position which does not overlap.
According to a fourth aspect of the present invention, in the configuration of the third aspect, the brushless motor is disposed sideways, an extrusion rod for extruding and discharging the caulking agent is disposed above the rotor, and the output gear rotates. The push rod is movable in the push direction.
In order to achieve the above object, an invention according to claim 5 is a caulking gun, which is an outer rotor type motor having a stator and a rotor disposed on the outer peripheral side of the stator and rotatable with respect to the stator. The caulking agent can be discharged by the rotation of the rotor.
In order to achieve the above object, an invention according to claim 6 is an electric tool, comprising a stator, a rotor disposed on the outer peripheral side of the stator and rotatable relative to the stator, and rotatable integrally with the rotor. An outer rotor type brushless motor having a fan, an output gear provided on the outer peripheral side of the fan, and an output member that is driven by rotation of the output gear.
In order to achieve the above object, an invention according to claim 7 is an electric tool, comprising a stator, a rotor disposed on an outer peripheral side of the stator and rotatable with respect to the stator, and a magnet provided on the rotor. , An outer rotor type brushless motor, an output gear provided on the outer peripheral side of the magnet, and an output member that is driven by the rotation of the output gear.
In order to achieve the above object, an invention according to claim 8 is an electric power tool, comprising: a brushless motor having a stator and a rotor rotatable with respect to the stator; and a motor housing that houses the brushless motor. A handle housing provided below the motor housing, a first circuit board for controlling the brushless motor, a second circuit board for adjusting the speed of the brushless motor, and detecting the rotation of the brushless motor. A third circuit board for receiving the second circuit board, and the second and third circuit boards are housed in a motor housing.

According to the first and sixth aspects of the present invention, the adoption of the brushless motor makes it possible to achieve compactness when it is turned sideways.
According to the second aspect of the present invention, in addition to the effect of the first aspect, the adoption of the outer rotor type makes it possible to achieve a low rotation and a high torque, thereby realizing a reduction in the speed reduction mechanism, and further reduction in weight and compactness. Can be realized. Further, by transmitting the rotation from the outer peripheral side of the rotor, further reduction of the left and right width can be expected.
According to the third aspect of the present invention, in addition to the effect of the second aspect, the rotor magnet and the output gear are arranged so as not to interfere with each other, so that the magnet and the output gear do not interfere with each other and the design freedom is obtained. The degree can be secured.
According to the fourth aspect of the present invention, in addition to the effect of the third aspect, the push bar can be arranged at an optimum position by utilizing the space above the horizontally oriented brushless motor.

It is a longitudinal cross-sectional view of a caulking gun. It is the sectional view on the AA line of FIG. It is the BB sectional view taken on the line of FIG. It is CC sectional view taken on the line of FIG. It is the DD sectional view taken on the line of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 is a longitudinal sectional view showing an example of a caulking gun, and FIG. 2 is a sectional view taken along line AA in FIG. In this caulking gun 1, a motor housing is integrally formed on an upper portion of a housing 2 formed by assembling left and right half housings 2a, 2b with a plurality of screws 3, 3,. The motor 4 and the rotation transmission unit 5 are accommodated, and an extrusion rod 6 as an output member is passed through the brushless motor 4 and the rotation transmission unit 5 in the front-rear direction. A handle housing 7 is integrally formed at the lower portion of the housing 2, and a battery pack 9 serving as a power source is attached to a mounting portion 8 formed at the lower end of the handle housing 7. A front end of a gear housing 10 that is assembled in the housing 2 and holds the rotation transmitting portion 5 protrudes from the front portion of the housing 2, and a cup-shaped holder joint 11 through which the push rod 6 passes is provided at the front end. The plate 12 abutted from the front is fixed with screws 13 so as to be mounted forward. A holder 14 having a U-shaped cross section for holding a caulking agent is screwed to the holder joint 11.

  The pusher bar 6 can move in the front-rear direction within the holder 14 coupled to the holder joint 11, and a rack 6a that meshes with a gear part 62 of an output cylinder 58, which will be described later, is formed at the lower edge part. As shown also in FIG. 3, a disk-like piston 15 is detachably connected by a screw 16. The piston 15 can be changed according to the form of the caulking agent (cartridge type or sausage type) set in the holder 14. The holder 14 can be changed according to the caulking agent. An operation handle 17 is provided at the rear end of the push bar 6 penetrating the gear housing 10 and the housing 2.

In the housing 2, a switch 18 with a trigger 19 protruding forward is accommodated in the upper part of the handle housing 7, and a lock lever 20 that locks the pushing of the trigger 19 is provided above the switch 18. . Further, a terminal block 21 is provided on the mounting portion 8 at the lower end of the handle housing 7, and the battery pack 9 is slid from the front side to the mounting portion 8, so that slide rails 23 provided on both upper sides are provided on the mounting portion 8. The guide rails (not shown) are fitted and connected. Simultaneously with this connection, the terminal plate 22 provided on the terminal block 21 is electrically connected to a connection terminal (not shown) provided on the upper part of the battery pack 9.
Further, a controller having a control circuit board (first circuit board) 24a on which a microcomputer and a capacitor for controlling the brushless motor 4 and a plurality of (here, six) switching elements are mounted above the terminal block 21. 24 is arranged. At the front end of the mounting portion 8, a lens 25 is provided obliquely upward, so that the light of the LED 26 for illumination provided in the controller 24 can be irradiated to the front of the holder 14.

  On the other hand, a sub-controller (second circuit board) 27 comprising a circuit board on which a speed adjustment dial 28 and an LED 29 for overload warning are mounted is provided above the push bar 6 at the upper part of the housing 2 to adjust the speed. The dial 28 is exposed through a window 30 provided on the rear surface of the housing 2, and the light of the LED 29 is visible through a lens 31 provided on the upper surface of the housing 2. The switch 18, the terminal block 21, and the sub-controller 27 are electrically connected to the controller 24 through lead wires (not shown).

  The brushless motor 4 is an outer rotor type having a stator 32 fixed to the housing 2 on the inner side and a rotor 33 on the outer side. First, the stator 32 includes a stator core 36 that is coaxial with the rotary shaft 35 that is pivotally supported by the half housings 2a and 2b via bearings 34a and 34b at both left and right ends. A cylindrical coil holding portion 37 in which a plurality of teeth 38 are formed radially on the outer peripheral side of the stator core 36. A coil 39 is wound around each tooth 38. Here, the stator core 36 is press-fitted into the half housing 2a and fixed in the rotational direction. The coil holding part 37 is press-fitted into the stator core 36 and fixed in the rotational direction. However, in addition to press-fitting, this fixing method can employ spline coupling or screw coupling.

  The rotor 33 is coaxially fixed to the rotary shaft 35 and has a bottomed cylindrical shape that covers the stator 32 from the right side, and a plurality of permanent magnets 41, 41. Are arranged at predetermined intervals in the circumferential direction. As shown in FIG. 5, a sensor circuit board 42 (third circuit board) on which a rotation detecting element 43 such as a Hall element is mounted on the half housing 2a on the left side of the permanent magnet 41 is the inner surface of the half housing 2a. It is fixed to the boss 44 projecting from the front and rear and up and down with screws 45 so that the detection signal of the permanent magnet 41 can be output to the controller 24. Although not shown in the figure, the controller 24 and the coil 39 are electrically connected by lead wires without passing through the sensor circuit board 42. Further, the terminal board 22 and the controller 24 are electrically connected by lead wires.

  Further, an axial fan 46 is integrally formed on the bottomed portion of the rotor 33, and air sucked from an air inlet (not shown) formed on the left side surface of the housing 2 is exhausted (not shown) formed on the right side surface of the housing 2. By discharging from the mouth, the brushless motor 4 can be cooled by allowing air to pass between the stator 32 and the rotor 33. Further, an output gear 47 is formed on the outer peripheral portion of the cylindrical portion 40 outside the axial fan 46. The output gear 47 is formed at a position that does not overlap the permanent magnet 41 of the rotor 33 in the axial direction of the rotary shaft 35.

  As shown in FIGS. 2 and 4, the rotation transmission unit 5 has a reduction shaft 49 that is pivotally supported in parallel with the rotation shaft 35 via bearings 48 a and 48 b at both left and right ends by half housings 2 a and 2 b. A driven gear 50 that meshes with the output gear 47 of the rotor 33 is integrally provided on the right portion of the shaft 49. A first carrier 51 including a flange portion 52 and a cylindrical portion 53 is coupled to the left portion of the reduction shaft 49 so as to be integrally rotatable. The cross section of the cylindrical portion 53 of the first carrier 51 has a polygonal shape in which nine flat surfaces are formed on the outer periphery. A second carrier 54 is externally provided on the outside of the first carrier 51. The second carrier 54 has an inner flange 55 that overlaps with the flange portion 52 of the first carrier 51, and is positioned outside the cylindrical portion 53 of the first carrier 51 toward the right side from the inner flange 55. Are formed by concentrically projecting support rods 56, 56,... At equal intervals in the circumferential direction, and the inner flange 55 is relative to the flange portion 52 of the first carrier 51 by a predetermined distance in the circumferential direction. It is rotatably engaged. Nine cylindrical pins 57, 57,... Are arranged between the support rods 56.

  Further, an output cylinder 58 is provided outside the second carrier 54. The output cylinder 58 is a multistage cylinder having a small diameter portion 59 on the right side and a large diameter portion 60 on the left side, and the right end of the small diameter portion 59 and the large diameter portion 60 are supported by left and right bearings 61a and 61b held in the gear housing 10. The left end is pivotally supported, and the large-diameter portion 60 covers the support rod 56 and the pin 57 of the second carrier 54 from the outside. A gear portion 62 is formed on the outer periphery of the small diameter portion 59. The gear portion 62 is positioned at the center in the left-right direction and can mesh with the rack 6 a of the push-out bar 6.

  The rotation transmission unit 5 has the same function as the transmission state switching unit disclosed in the prior art document. That is, in a state where the brushless motor 4 is not driven and the reduction shaft 49 does not rotate normally, each pin 57 is positioned on the flat surface of the cylindrical portion 53 of the first carrier 51 and interferes with the large diameter portion 60 of the output cylinder 58. The first carrier 51 and the output cylinder 58 are not integrated in the rotation direction, and the torque is cut off, and the output cylinder 58 is in a rotation free state. On the other hand, when the speed reducing shaft 49 rotates in the forward direction, the pins 57 are pushed up in the radial direction between the support rods 56 of the second carrier 54 by the movement of the flat surface of the cylindrical portion 53 accompanying the rotation of the first carrier 51. Since the wedge portion is not easily inserted between the cylindrical portion 53 and the large diameter portion 60, the torque from the first carrier 51 is transmitted to the output cylinder 58 via the pin 57, and the gear portion 62 rotates forward.

As shown in FIG. 4, a magnet 64 is held in a vertical through-hole 63 formed in the gear housing 10 below the large-diameter portion 60 of the output cylinder 58. The large-diameter portion 60 is pressed by a coil spring 66 provided between the receiving housing 65 formed in the split housing 2a. As a result, rotational resistance is applied to the output cylinder 58 so that torque can be transmitted / interrupted accurately.
On the other hand, a disk-shaped plate 67 is provided between the large diameter portion 60 of the output cylinder 58 and the inner flange 55 of the second carrier 54, and the large diameter section 60 and the inner flange 55 are positioned together with the positioning of the output cylinder 58. Is blocked. The plate 67 is positioned by a dish-like spacer 70 provided outside the first and second carriers 51 and 54 between the plate 67 and a washer 69 coupled to a constricted portion 68 at the left end of the speed reduction shaft 49. An oil seal 71 is interposed between the spacer 70 and the first and second carriers 51 and 54.

  In the caulking gun 1 configured as described above, the rotation of the output cylinder 58 becomes free when the brushless motor 4 is not driven as described above, so that the operator grasps the operation handle 17 and pushes the push rod 6. By retracting, a caulking agent cartridge can be set between the piston 15 and the tip of the holder 14. Then, when the push rod 6 is moved forward to bring the piston 15 into contact with the rear end of the cartridge, and the trigger 19 is pushed in and the switch 18 is turned on in this state, the power source of the battery pack 9 is switched to the brushless motor 4. The rotor 33 is rotated by being supplied to the coil 39 of the stator 32. That is, the controller 24 that has obtained the detection signal of the rotation detection element 43 causes the switching element to perform a switching operation and sequentially energizes the coil 39 to rotate the rotor 33.

When the rotor 33 rotates, the rotation transmission unit 5 rotates the reduction shaft 49 via the driven gear 50 that meshes with the output gear 47 of the rotor 33, thereby causing the first carrier 51 to rotate positively integrally. Therefore, as described above, the wedge action of the pin 57 is generated and the output cylinder 58 rotates integrally. Therefore, the push bar 6 is pushed forward by the rack 6a meshing with the gear portion 62, and the front end of the cartridge pressed by the piston 15 is used. The caulking agent is discharged from. The pushing speed of the pushing bar 6 can be adjusted with the speed adjustment dial 28.
When the push of the trigger 19 is released and the switch 18 is turned off, the controller 24 here causes the rotor 33 of the brushless motor 4 to rotate slightly backward and then stops. By this reverse rotation, the wedge action of the pin 57 is released, and the output cylinder 58 is again in a rotation free state. Therefore, the cartridge can be replaced by manual operation of the push-out bar 6.

As described above, according to the caulking gun 1 of the above embodiment, the brushless motor 4 is provided and the caulking agent can be discharged by the rotation of the rotor 33, so that the lateral width can be reduced even in the horizontal direction and the downsizing can be achieved. It becomes possible.
In particular, here, the brushless motor 4 is an outer rotor type in which the rotor 33 is disposed on the outer peripheral side of the stator 32, and the caulking agent can be discharged by transmitting the rotation from the outer peripheral portion of the rotor 33. Thus, the reduction of the speed reduction mechanism can be realized, and further weight reduction and downsizing can be realized. Further, by transmitting the rotation from the outer peripheral side of the rotor 33, further reduction of the left and right width can be expected.

Further, since the permanent magnet 41 and the output gear 47 are arranged in a position where they do not overlap in the axial direction of the rotor 33, the permanent magnet 41 and the output gear 47 do not interfere with each other, and mutual design freedom can be secured. .
Further, the brushless motor 4 is disposed sideways, and an extrusion rod 6 for extruding and discharging the caulking agent is disposed above the rotor 33, and the extrusion rod 6 can move in the extrusion direction by the rotation of the output gear 47. For this reason, the push bar 6 can be arranged at an optimum position by utilizing the space above the brushless motor 4 that is turned sideways.

Note that the directions of the brushless motor and the rotation transmission unit may be reversed to the left and right with respect to the above-described configuration, and the brushless motor may be disposed further below the rotation transmission unit. In the above embodiment, the axial fan is integrally formed with the rotor of the brushless motor. However, an axial fan or a centrifugal fan separate from the rotor can be fixed to the rotating shaft. Of course, an inner rotor type brushless motor in which the rotor is located inside the stator can also be adopted.
Also, the structure of the rotation transmission unit can be changed in design, such as increasing the number of reduction shafts or adopting a planetary gear reduction mechanism.
In addition, the form of the caulking gun itself, such as the form of the handle housing and the position of the controller, is not limited to the above form, and may be changed as appropriate.

  The present invention is not limited to the caulking gun as in the above-described embodiment, and the tip tool is transmitted by torque transmission from an output gear provided on the outer peripheral side of a fan or magnet integral with the rotor, using an outer rotor type brushless motor as a drive source. For example, an electric tool (for example, a driver drill or an impact driver) that rotates or reciprocates an output member such as an output member can be employed. Accordingly, the position and orientation of the brushless motor can also be selected as appropriate depending on the torque transmission structure to the output member, such as being provided forward in the upper part of the housing or upwardly in the lower part.

Also, an outer rotor type brush motor can be used as a drive source. In this case, high torque can be realized, and the push rod can be easily moved even when the viscosity of the caulking agent is high (when it is difficult to move the push rod).
Furthermore, the output gear may be shifted in the left-right direction instead of the outer periphery of the axial fan. This is because downsizing of the brushless motor itself has been achieved, downsizing in the vertical direction is also achieved, and there is a margin in the left-right direction.
The terminal block and the sensor circuit board are connected by a power supply lead wire, the brushless motor coil and the sensor circuit board are electrically connected, and a plurality of switching elements are arranged on the sensor circuit board. Also good. In this case, the power supply lead wire is not connected to the controller, and wiring becomes easy.

  1 .... Caulking gun, 2 .... Housing, 4 .... Brushless motor, 5 .... Rotation transmission part, 6 .... Extrusion rod, 7. Handle housing, 8 .... Mounting part, 9 .... Battery pack, 10. · Gear housing, 14 · · Holder, 15 · · piston, 24 · · controller, 32 · · stator, 33 · · rotor, 35 · · rotating shaft, 39 · · coil, 40 · · tube portion, 46 · · shaft Flow fan, 47 ... Output gear, 49 ... Reduction shaft, 50 ... Driven gear, 51 ... First carrier, 53 ... Cylindrical part, 54 ... Second carrier, 56 ... Support rod, 57 ... -Pin, 58-Output cylinder, 59-Small diameter part, 60-Large diameter part, 62-Gear part.

Claims (8)

  A caulking gun comprising a brushless motor having a stator and a rotor rotatable with respect to the stator, and capable of discharging a caulking agent by the rotation of the rotor.   The said brushless motor is an outer rotor type | mold which has arrange | positioned the said rotor to the outer peripheral side of the said stator, and can discharge a caulking agent by transmitting rotation from the outer peripheral part of the said rotor. Caulking gun.   The rotor is provided with a plurality of magnets, and an output gear is formed on the outer peripheral portion, and the magnet and the output gear are arranged in a position where they do not overlap in the axial direction of the rotor. The caulking gun according to claim 2.   The brushless motor is disposed sideways, an extrusion bar for extruding and discharging a caulking agent is disposed above the rotor, and the extrusion bar is movable in the extrusion direction by rotation of the output gear. The caulking gun according to claim 3, wherein   A coking comprising an outer rotor type motor having a stator and a rotor disposed on an outer peripheral side of the stator and rotatable relative to the stator, and capable of discharging a caulking agent by the rotation of the rotor. gun. An outer rotor type brushless motor having a stator, a rotor disposed on the outer peripheral side of the stator and rotatable with respect to the stator, and a fan integrally rotatable with the rotor;
An output gear provided on the outer peripheral side of the fan;
And an output member driven by rotation of the output gear. An outer rotor type brushless motor having a stator, a rotor disposed on an outer peripheral side of the stator and rotatable with respect to the stator, and a magnet provided on the rotor;
An output gear provided on the outer peripheral side of the magnet;
And an output member driven by rotation of the output gear. A brushless motor having a stator and a rotor rotatable with respect to the stator;
A motor housing that houses the brushless motor;
A handle housing provided below the motor housing;
A first circuit board for controlling the brushless motor; a second circuit board for adjusting the speed of the brushless motor; and a third circuit board for detecting the rotation of the brushless motor. Prepared,
The power tool, wherein the second and third circuit boards are accommodated in the motor housing.

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