Reciprocating cutting tool

Abstract

This invention provides a reciprocating cutting tool. The reciprocating saw, as a reciprocating cutting tool, comprises: a rod-shaped slider (6) having a saw blade holding portion (138) for holding the saw blade; a slip shoe (229) capable of sliding along the extension direction (front-back direction) of the slider (6); a slip shoe locking mechanism (254) capable of locking the slip shoe (229); and a pin (240) capable of interfering with the slip shoe (229). The slip shoe locking mechanism (254) inhibits the sliding of the slip shoe (229) by locking it, and allows the slip shoe (229) to slide by releasing the locking. The pin (240) interferes with the slip shoe (229) sliding to a predetermined position. Accordingly, the positioning of the slip shoe in the reciprocating cutting tool exhibits superior durability, is less prone to movement or easier to operate during operation, and more reliably prevents slippage when pulled forward beyond the predetermined position.

Description

Technical Field

[0001] This invention relates to a reciprocating motion cutting tool such as a rechargeable reciprocating saw. Background Technology

[0002] U.S. Patent No. 6272757 (Patent Document 1) and European Patent No. 0669181 (Patent Document 2) disclose an adjustable slipper for a reciprocating saw.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: U.S. Patent No. 6272757

[0006] Patent Document 2: Description of European Patent No. 0669181 Summary of the Invention

[0007] The technical problem that the invention aims to solve

[0008] There is a need for a technology that offers superior durability in the positioning of the slippers involved in reciprocating cutting tools, is less prone to shifting during operation, is easier to operate, and reliably prevents slippage when pulled forward beyond the specified position, such as the maximum pull-out position.

[0009] Technical solutions for solving technical problems

[0010] This specification discloses a reciprocating cutting tool. The reciprocating cutting tool may include a motor, a rod-shaped slider, and a reciprocating motion conversion mechanism. The slider has a top tool holding portion at its top end to hold a top tool. With the extension direction of the slider as the front-back direction, the reciprocating motion conversion mechanism converts the rotation of the motor into reciprocating motion in the front-back direction and transmits it to the slider. The reciprocating cutting tool may have a slide shoe adjacent to the top tool holding portion, capable of contacting the workpiece acted upon by the top tool, and capable of sliding in the front-back direction. The reciprocating cutting tool may have a slide shoe locking mechanism capable of locking the slide shoe. The reciprocating cutting tool may have a pin capable of interfering with the slide shoe. The slide shoe locking mechanism can inhibit the sliding of the slide shoe by locking it. The slide shoe locking mechanism can allow the slide shoe to slide by releasing the locking of the slide shoe. The pin can interfere with the slide shoe sliding to a predetermined position.

[0011] Invention Effects

[0012] The reciprocating cutting tool according to the present invention has a more durable positioning mechanism for the slip shoe.

[0013] In addition, the skates are less likely to move during operation once they are in position.

[0014] Furthermore, it makes it easier to position the skis.

[0015] In addition, it can more reliably prevent slippage when pulled forward from a position greater than the maximum pull-out position or other specified positions. Attached Figure Description

[0016] Figure 1 This is a perspective view of the reciprocating saw involved in this invention, viewed from the upper left front.

[0017] Figure 2 yes Figure 1 Central longitudinal section view.

[0018] Figure 3 yes Figure 2 A magnified view of a portion of the image.

[0019] Figure 4 yes Figure 3 AA sectional view.

[0020] Figure 5 Viewed from above Figure 2 A partial three-dimensional exploded view of the reciprocating motion conversion mechanism and its surrounding components.

[0021] Figure 6 Viewed from below Figure 2 A partial three-dimensional exploded view of the reciprocating motion conversion mechanism and its surrounding components.

[0022] Figure 7 yes Figure 2 A central longitudinal sectional view of a portion of the reciprocating motion conversion mechanism and its surrounding components.

[0023] Figure 8 From Figure 7 The central longitudinal section view of the rail switching lever when it is in the forward position with the handle part lowered.

[0024] Figure 9 Viewed from the upper right front Figure 1 A three-dimensional view of the front part of the reciprocating saw.

[0025] Figure 10 yes Figure 2 A magnified view of the front section.

[0026] Figure 11 Viewed from above Figure 2 A partial three-dimensional exploded view of the guide shoe mechanism and its surrounding components.

[0027] Figure 12 Viewed from below Figure 2 A partial three-dimensional exploded view of the guide shoe mechanism and its surrounding components.

[0028] Figure 13 yes Figure 10 BB cross-sectional view.

[0029] Figure 14 yes Figure 10 CC section view.

[0030] Figure 15 yes Figure 10 DD sectional view.

[0031] Figure 16 yes Figure 10 EE sectional view.

[0032] Explanation of reference numerals in the attached figures

[0033] 1: Reciprocating saw (reciprocating motion cutting tool); 3: Motor; 5: Reciprocating motion conversion mechanism; 6: Sliding component; 20: Power transmission housing; 20b: Lower power transmission housing; 220: Slipper plate; 222: Guide shoe plate; 222H: Hole; 226: Slipper bracket; 226B: Base plate; 226J: Left convex part (protrusion); 226K: Left locked part; 226L: Left wall part; 226P: Right convex part 226Q: Right locked part; 226R: Right wall part; 226S: Cutout; 229: Slipper; 230: Screw; 240: Pin; 250: Slipper bracket locking shaft; 250C: Left cylindrical face (cylindrical face); 250D: Right cylindrical face (cylindrical face); 250F: Left flat face (flat face); 250G: Right flat face (flat face); 254: Slipper locking mechanism. Detailed Implementation

[0034] The reciprocating saw of this invention may include a motor, a rod-shaped slider, and a reciprocating motion conversion mechanism. A saw blade holding portion is provided at the top of the slider to hold the saw blade. With the extension direction of the slider as the front-back direction, the reciprocating motion conversion mechanism converts the rotation of the motor into a front-back reciprocating motion and transmits it to the slider. The reciprocating saw may have a slipper adjacent to the saw blade holding portion, capable of contacting the workpiece acted upon by the saw blade, and capable of sliding in the front-back direction. The reciprocating saw may have a slipper locking mechanism capable of engaging the slipper. The reciprocating saw may have a pin capable of interfering with the slipper. The slipper locking mechanism can inhibit the sliding of the slipper by engaging it. The slipper locking mechanism can allow the slipper to slide by releasing the engagement of the slipper. The pin can interfere with the slipper sliding to a predetermined position.

[0035] In this case, pulling the shoe further forward than the specified position, such as the foremost sliding position, can more reliably prevent the shoe from slipping off.

[0036] Furthermore, by pushing upwards, the pin can be moved to a position that does not interfere with the slipper. The slipper can then be separated from the parts other than the slipper itself without being stopped by the slipper locking mechanism or interfered with by the pin. In this case, the slipper can be separated while preventing it from falling off.

[0037] Furthermore, the pin can be applied force to the location where it interferes with the slipper. In this case, it is possible to more reliably prevent the slipper from falling off while separating it.

[0038] Alternatively, the pin can be adjacent to the locking mechanism. In this case, it is easier to lock the slipper and operate the pin.

[0039] Alternatively, the skid can have a skid plate and a skid support, wherein the skid plate contacts the workpiece, and the skid support supports the skid plate. The skid support can have slits extending forward and backward. A pin can enter the slits. In this case, the skid and pin can be configured more compactly.

[0040] Additionally, the cutout can have a protrusion to narrow its width. A pin can interfere with the protrusion. In this case, the structure for interfering with the slip shoe can be set more efficiently.

[0041] Furthermore, the ski shoe support can extend forward and backward. The ski shoe support can have a base plate, a left wall, and a right wall, wherein the left wall rises from the left side of the base plate, and the right wall rises from the right side of the base plate. In this case, the ski shoe support can be installed more securely.

[0042] Alternatively, the slipper locking mechanism may also have a slipper bracket locking shaft, which is cylindrical with a flat portion and a cylindrical portion, and is rotatable about a central axis. At least one of the left and right wall portions may have a locked portion, which is locked by the cylindrical portion of the slipper bracket locking shaft. By rotating the slipper bracket locking shaft, the flat portion can be made to face the locked portion, the cylindrical portion can be disengaged from the locked portion, and the locking of the slipper bracket locking shaft on the slipper can be released. In this case, the structure for locking the slipper can be configured more efficiently.

[0043] In addition, a skid plate can be supported on at least one of the left and right walls, which makes the skid structure more efficient.

[0044] Additionally, a guide plate can be provided to guide the skate shoe support. In this case, the sliding of the skate shoe can be set more efficiently and the structure of the skate shoe can be held more firmly.

[0045] Furthermore, the guide shoe plate can have holes through which the pin passes. In this case, the pin or the structure used to operate it becomes more efficient.

[0046] Alternatively, a power transmission housing can be provided to maintain the reciprocating motion conversion mechanism. Furthermore, a skid support can be configured between the power transmission housing and the guide shoe plate. In this case, the skid and its adjacent components can be arranged more compactly.

[0047] Alternatively, the guide shoe plate can be fixed to the power transmission housing with screws. The screws can also pass through a notch. In this case, the skid and its adjacent components can be arranged more compactly.

[0048] Furthermore, the specified position can be the foremost position where the slipper is locked by the slipper locking mechanism (the foremost sliding position). In this case, the slipper stops due to interference the moment it is pulled out to the foremost sliding position.

[0049] Hereinafter, embodiments and variations thereof of the present invention will be described suitably with reference to the accompanying drawings.

[0050] This method relates to a power tool, a reciprocating cutting tool as an example of a reciprocating motion tool, and more specifically, to a reciprocating saw.

[0051] The terms "front," "back," "up," "down," "left," and "right" in this method and its variations are for ease of explanation and may vary depending on the working conditions and the state of at least one of the moving parts.

[0052] Furthermore, the present invention is not limited to this method and its variations.

[0053] Figure 1 This is a perspective view of the reciprocating saw 1 involved in this invention, viewed from the upper left front. Figure 2 yes Figure 1 Central longitudinal section view. Figure 3 yes Figure 2 A magnified view of a portion of the image. Figure 4 yes Figure 3 AA sectional view.

[0054] exist Figure 2 and Figure 3 In the middle, the right side of the figure shows the front of reciprocating saw 1, and the top side of the figure shows the top of reciprocating saw 1.

[0055] The reciprocating saw 1 has a main body shell 2, a motor 3, a fan 4, a reciprocating motion conversion mechanism 5, a sliding part as the output part 6, a guide shoe mechanism 8, a counterweight mechanism 9, a track mechanism 12, a track switching mechanism 14, and a release mechanism 201 (see reference). Figure 9 , Figure 13 , Figure 14 wait).

[0056] The main housing 2 is a support frame that directly or indirectly holds various components. The main housing 2 includes a motor housing 18, a power transmission housing 20, and a cover 22.

[0057] The front of the motor housing 18 is cylindrical. The rear of the motor housing 18 is formed into a closed loop. The motor housing 18 is made of plastic.

[0058] The motor housing 18 holds the motor 3 within its upper front portion. The motor 3 has a motor housing 3a. The motor housing 3a is the outer contour of the motor 3. The motor housing 3a is cylindrical. The front of the motor housing 3a is open. The motor housing 18 is connected to the power transmission housing 20 via the motor housing 3a.

[0059] The motor housing 18 is formed by splitting it in half, and has a left motor housing 18a and a right motor housing 18b.

[0060] The left motor housing 18a has multiple threaded bosses 24. The right motor housing 18b has multiple threaded holes (not shown). The arrangement of the threaded holes corresponds to the arrangement of the threaded bosses 24. The right motor housing 18b is secured to the left motor housing 18a by inserting multiple screws 28 into the threaded bosses 24 and the threaded holes, respectively, in a left-right direction.

[0061] The closed-loop rear portion extending vertically within the motor housing 18 is the first grip portion 30. The first grip portion 30 is held by the user.

[0062] Multiple air inlets 31 are provided in the closed-loop portion at the rear of the motor housing 18, facing the front surface of the first grip portion 30. Each air inlet 31 extends in the left-right direction and is arranged in the up-down direction. A motor 3 is arranged in front of each air inlet 31.

[0063] A trigger switch 32 is held on the upper part of the first grip portion 30.

[0064] The trigger switch 32 has a trigger 33 and a trigger switch body 34.

[0065] The trigger 33 protrudes from the front of the upper part of the first grip portion 30. The user can pull the trigger 33 with their fingertip (moving the trigger 33 backward). The trigger 33 is positioned in front of the trigger switch body portion 34. The trigger 33 is connected to the trigger switch body portion 34.

[0066] The trigger switch body 34 is disposed within the upper part of the first grip portion 30. By operating the trigger 33, the trigger switch body 34 is switched on and off. When the trigger 33 is engaged to a predetermined amount or more, the trigger switch body 34 is engaged. Furthermore, the trigger switch body 34 sends a signal (e.g., a resistance value) that changes according to the engagement amount exceeding the predetermined amount. Based on this signal, the rotational speed of the motor 3 changes.

[0067] The trigger 33 switches the motor 3 on and off via the trigger switch body 34. The trigger 33 is the switch operating part that operates the motor 3 on and off.

[0068] A lock-off button 35 is provided on the upper side of trigger 3. The lock-off button 35 is a plate-shaped part that extends in the left-right direction.

[0069] The left and right portions of the anti-lock button 35 protrude from the motor housing 18. By pushing its left portion, the anti-lock button 35 can slide to the right. Conversely, by pushing its right portion, the anti-lock button 35 can slide to the left.

[0070] When the anti-lock button 35 is slid to the right and is in its right position, it prevents the trigger 33 from being pulled. Therefore, the motor 3 cannot be activated. When the anti-lock button 35 is slid to the left and is in its left position, it allows the trigger 33 to be pulled. Therefore, the motor 3 can be activated.

[0071] A speed setting dial 36 is located in front of the anti-lock button 35. The speed setting dial 36 is a disc that unfolds upwards, downwards, leftwards, and rightwards, and can be rotated. The upper part of the speed setting dial 36 protrudes from the motor housing 18.

[0072] The speed setting dial 36 sends a signal corresponding to the rotation position (angle). The maximum speed of the motor 3 is set according to this signal.

[0073] The speed setting dial 36 is disposed within a recess 2P, which is located on the upper part of the main body housing 2 (motor housing 18). The recess 2P is recessed downwards relative to its surrounding portion. Figure 2 As shown by the dashed line G, the speed setting dial 36 is positioned below the virtual plane that contacts the front and rear sides of the recess 2P. Therefore, it is possible to prevent the user from accidentally touching the speed setting dial 36, thereby suppressing misoperation of the speed setting dial 36. Furthermore, even if an object approaches from above the main body shell 2 and contacts the upper part of the main body shell 2, the object is unlikely to enter the recess 2P (positioned below the dashed line G). Therefore, the speed setting dial 36 can be protected from impacts from objects.

[0074] The controller 40 is held on the underside of the motor 3 by the motor housing 18. The controller 40 has a control circuit board 42 and a controller housing 44.

[0075] The control circuit board 42 controls the motor 3. At least one microcomputer and multiple (6 or 12) switching elements are mounted on the control circuit board 42.

[0076] The controller housing 44 is made of metal (aluminum) and is an open-top box shape that opens upwards and backwards. The control circuit board 42 is placed inside the controller housing 44. A molding layer 46 covering the control circuit board 42 is formed by molding within the controller housing 44.

[0077] The controller 40 is positioned below the motor 3. The controller 40 is tilted, or more specifically, it is tilted forward and lowered backward.

[0078] The front surface of the controller housing 44 extends along the front wall 18W of the lower front portion 18F of the motor housing 18.

[0079] Multiple rear lower exhaust holes 48 are provided on the lower front part 18F of the motor housing 18. Each rear lower exhaust hole extends in the left-right direction and is arranged in a front-back and left-right manner.

[0080] Each rear lower exhaust port 48 is located in the portion of the motor housing 18 that is lower than the portion holding the controller 40. That is, each rear lower exhaust port 48 is located in the portion of the motor housing 18 opposite to the fan 4 relative to the controller 40.

[0081] An exhaust passage is formed between the front surface of the controller housing 44 and the front wall 18W, through which exhaust air WD from the fan 4 for cooling passes. The exhaust air WD is discharged to the outside through each of the rear lower exhaust ports 48.

[0082] The lower rear portion 18E of the motor housing 18 is recessed upward relative to the lower front portion 18F of the motor housing 18.

[0083] A battery mounting section 50 is provided at the lower rear part 18E of the motor housing 18.

[0084] An opening is formed in the lower rear part 18E of the motor housing 18.

[0085] The battery mounting section 50 holds the terminal block 52. The front of the terminal block 52 is box-shaped, and the rear of the terminal block 52 is plate-shaped. The terminal block 52 blocks the opening in the lower rear part 18E of the motor housing 18 and protrudes from the opening. The terminal block 52 holds multiple terminal plates (not shown).

[0086] The battery 54 is mounted on the battery mounting section 50 by sliding from the rear to the front. The mounted battery 54 is electrically connected to the terminal block 52 (terminal plate). The battery 54 supplies power to the motor 3.

[0087] The power transmission housing 20 directly or indirectly supports the reciprocating motion conversion mechanism 5, the sliding member 6, the counterweight mechanism 9, the track mechanism 12, and the track switching mechanism 14. The power transmission housing 20 is made of metal, specifically aluminum alloy. The power transmission housing 20 is connected to the front side of the motor housing 18.

[0088] The power transmission housing 20 is formed in two sections and is cylindrical with openings at the front and rear. Since the power transmission housing 20 is equipped with the reciprocating motion conversion mechanism 5, it can be understood as the housing of the conversion mechanism.

[0089] The power transmission housing 20 has an upper power transmission housing 20a, a lower power transmission housing 20b, and a bearing housing 114.

[0090] The upper power transmission housing 20a is secured by multiple vertical screws 55. Figure 4 , Figure 16 It is fixed to the lower power transmission housing 20b.

[0091] The rear end of the lower power transmission housing 20b is mounted to the front end of the motor housing 18 by a plurality of screws (not shown) extending forward from the motor housing 3a in the front direction.

[0092] The cover 22 is cylindrical. The cover 22 is externally mounted on the power transmission housing 20. The cover 22 is disposed on the outside of the power transmission housing 20. The cover 22 is made of an elastomer (rubber) and is disposed on the outside of the power transmission housing 20 as a heat insulation or electrical insulation cover. Furthermore, the cover 22 may not be included in the structural elements of the main housing 2. Additionally, the cover 22 may be formed of plastic.

[0093] The rear end of the cover 22 covers the front end of the motor housing 18. The cover 22 is continuous with the motor housing 18 through its outer surface.

[0094] Multiple exhaust vents 56 of the main body are provided on the left and right sides of the central part of the cover 22. Figure 1 , Figure 9 The vents 56 on the left side of each main body extend in the front-to-back direction and are arranged in the vertical direction. Similarly, the vents 56 on the right side of each main body... Figure 9 It extends in the front-to-back direction and is arranged in the vertical direction. The exhaust vents 56 of each main body are positioned in front of the fan 4.

[0095] Furthermore, a track switching rod hole 58 is provided on the left rear part of the cover 22. Figure 1 The track switching rod unfolds along the vertical and horizontal directions using hole 58.

[0096] On the other hand, the lower part of the cover 22, that is, the front part of the main body shell 2, becomes the second grip part 60. The second grip part 60 is held by the user.

[0097] Furthermore, at least one of the following can be varied: the number of sections in the main body housing 2, the size of each section in the main body housing 2, and the shape of each section in the main body housing 2. For example, the rear part of the motor housing 18 can be configured as a handle housing formed separately from the motor housing 18. Additionally, the battery mounting part 50 can be formed separately from the motor housing 18.

[0098] Furthermore, a lamp 62 is disposed between the upper front part of the power transmission housing 20 and the upper front part of the cover 22. The lamp 62 has an LED substrate. The LED substrate is equipped with LEDs.

[0099] Lamp 62 emits light and projects it forward. Lamp 62 can illuminate the vicinity of the cutting position in front of slider 6.

[0100] The motor 3, trigger switch body 34, speed setting dial 36, terminal block 52 (terminal plate) and lamp 62 are electrically connected to the control circuit board 42 by multiple wires (not shown).

[0101] The main body 69 of the reciprocating saw 1 is formed by the part that holds the motor 3 in the motor housing 18 (the part outside the motor 3), the power transmission housing 20, the various parts held by these parts, and the cover 22.

[0102] Motor 3 is electric. Motor 3 is a brushless motor. Motor 3 is DC driven.

[0103] The motor 3 has a motor housing 3a, a stator 71 and a rotor 72.

[0104] The motor housing 3a is held in the motor housing 18.

[0105] The stator 71 has multiple (6) coils 73. The stator 71 is cylindrical.

[0106] A sensor substrate 75 is fixed to the stator 71. Multiple (3) magnetic sensors are fixed to the rear surface of the sensor substrate 75. Each magnetic sensor receives a rotation detection signal indicating the rotational position of the rotor 72, thereby obtaining the rotational state of the rotor 72. Furthermore, the sensor substrate 75 and the control circuit board 42 are electrically connected via multiple (6) wires (signal lines) not shown. The signal lines pass through the lower front portion 18F of the motor housing 18.

[0107] Furthermore, a coil connection portion 77 is provided on the stator 71, which serves as a contact point for electrically connecting each coil 73 in a predetermined manner. The first ends of multiple (three) wires (power lines, not shown) are connected to the coil connection portion 77. These three power lines are three-phase. Each power line passes through the lower front portion 18F of the motor housing 18. The second ends of each power line are connected to the control circuit board 42.

[0108] The rotor 72 is located inside the stator 71. The motor 3 is an internal rotor type.

[0109] The rotor 72 has a motor shaft 80, a rotor core 82, multiple (4) permanent magnets 84 and a sleeve 86.

[0110] The motor shaft 80 is cylindrical and extends front to back. The motor shaft 80 is made of metal. The motor shaft 80 rotates around its own axis. The front end of the motor shaft 80 reaches the rear end of the power transmission housing 20. A pinion portion 80a is formed at the front end of the motor shaft 80. The pinion portion 80a has multiple teeth.

[0111] The rotor core 82 is cylindrical. The axial direction of the rotor core 82 is front-to-back. The rotor core 82 is formed by multiple steel plates stacked in the front-to-back direction and extending in all directions. The rotor core 82 is fixed to the outside of the motor shaft 80.

[0112] Each permanent magnet 84 is plate-shaped. The four permanent magnets 84 are arranged inside the rotor core 82 in a manner that alternates in polarity in the circumferential direction. The four permanent magnets 84 do not contact each other.

[0113] The sleeve 86 is made of metal (brass) and is ring-shaped. The sleeve 86 is fixed to the rotor core 82, the permanent magnets 84, and the motor shaft 80 on the front side of the rotor core 82 and the permanent magnets 84. The sleeve 86 prevents the permanent magnets 84 from falling off the motor shaft 80 by fixing the permanent magnets 84.

[0114] Additionally, a front bearing 88 for the motor is provided in front of the sleeve 86. The front bearing 88 is positioned around the front portion of the motor shaft 80. The front bearing 88 supports the motor shaft 80 so that it can rotate about its axis.

[0115] The front bearing 88 of the motor is held at the rear of the lower power transmission housing 20b.

[0116] A rear bearing 92 is provided around the rear end of the motor shaft 80. The rear bearing 92 supports the motor shaft 80 so that it can rotate about its axis. The rear bearing 92 is held in the motor housing 3a.

[0117] A fan 4 is disposed around the central periphery of the motor shaft 80, behind the front bearing 88 and in front of the sleeve 86. The fan 4 is a centrifugal fan with multiple blades. The fan 4 pushes air radially outward by rotation. The fan 4 is integrally fixed to the motor shaft 80 and can rotate integrally with the motor shaft 80. The fan 4 is disposed on the motor shaft 80. The fan 4 is held in the motor housing 18 by the rotor 72 and the lower power transmission housing 20b.

[0118] A lower power transmission housing 20b is configured on the front side of the fan 4.

[0119] Below the fan 4 is the upper end of the air passage (lower air passage) between the front surface of the controller housing 44 and the front wall 18W of the lower front part 18F of the motor housing 18.

[0120] In addition, fan 4 can also serve as a structural element of motor 3.

[0121] Figure 5 , Figure 6 This is a partial three-dimensional exploded view of the reciprocating motion conversion mechanism 5 and its surrounding components, viewed from the top and bottom sides. Figure 7 This is a central longitudinal sectional view of a portion of the reciprocating motion conversion mechanism 5 and its surrounding components. Figure 8 From Figure 7 When the handle part 174 of the track switching lever 170 is lowered forward (refer to...) Figure 1 The central longitudinal section view (with double-dotted lines).

[0122] The reciprocating motion conversion mechanism 5 is a power transmission mechanism that transmits the power of the motor 3 to the sliding member 6. The reciprocating motion conversion mechanism 5 converts the rotational motion of the motor shaft 80 of the motor 3 into the reciprocating motion of the sliding member 6 and transmits it. The reciprocating motion conversion mechanism 5 is held within the power transmission housing 20. The reciprocating motion conversion mechanism 5 is located between the motor 3 and the sliding member 6.

[0123] The reciprocating motion conversion mechanism 5 includes a bevel gear 100, a torque limiting mechanism 102, an intermediate shaft 104, a crank base 106, and a crank cam 108.

[0124] The bevel gear 100 is a disc-shaped gear extending forward, backward, left, and right, with bevel teeth (not shown) on the periphery of its upper surface. The bevel gear 100 meshes with the pinion section 80a.

[0125] The bevel gear 100 rotates about a virtual axis of rotation that passes through the center in the front-back, left-right and right directions, and in the up-down direction.

[0126] The torque limiting mechanism 102 is disposed between the bevel gear 100 and the intermediate shaft 104.

[0127] The torque limiting mechanism 102 transmits power from the bevel gear 100 to the intermediate shaft 104. The upper and lower horizontal plates of the torque limiting mechanism 102, which are tightly pressed together by the force of the elastic body, separate from each other due to the excessive load from the side of the bevel gear 100, thereby protecting the bevel gear 100 and the motor 3 from the effects of the load.

[0128] The intermediate shaft 104 is a cylindrical component that extends vertically.

[0129] Intermediate shaft 104 is supported by upper intermediate bearing 110 and lower intermediate bearing 112 so that it can rotate about the same virtual axis of rotation as the bevel gear 100. Figure 2 and Figure 3 ).

[0130] The upper intermediate bearing 110 is held in the lower power transmission housing 20b.

[0131] The lower intermediate bearing 112 is a needle roller bearing. The lower intermediate bearing 112 is held in a disc-shaped bearing housing 114. Figure 2 , Figure 3 The bearing housing 114 is secured by multiple screws 116 in the vertical direction. Figure 2 , Figure 3 Only one is shown in the diagram) which is fixed to the lower power transmission housing 20b.

[0132] The crank base 106 is a crank-shaped component.

[0133] The lower part of the crank base 106 is a cylindrical part 106A, which is fixed to the upper part of the intermediate shaft 104 by screws.

[0134] The central part of the crank base 106 becomes a plate-shaped part 106B that extends forward, backward, left and right.

[0135] The upper part of the crank base 106 is formed as an eccentric disk portion 106C, the center of which is offset from the virtual central axis of the lower part of the crank base 106, and the eccentric disk portion 106C extends in the front, back and left and right directions.

[0136] The crank cam 108 has a crank cam body 120, an eccentric pin 122, a barrel roller 124, and a bearing 126.

[0137] The crank cam body 120 is a disc-shaped component extending forward, backward, left, and right. The virtual central axis in the vertical direction of the crank cam body 120 coincides with the virtual rotation axis of the bevel gear 100. A connecting portion 127, protruding downward in a cylindrical shape relative to other parts, is formed at the lower part of the crank cam body 120. The eccentric disc portion 106C of the crank base 106 is engaged with the connecting portion 127 by screws 128 and press-fitting. Furthermore, a cam portion 130 is formed on the periphery of the upper surface of the crank cam body 120. The cam portion 130 protrudes upward relative to adjacent parts. The cam portion 130 appears annular when viewed from above. The vertical height of the cam portion 130 gradually changes circumferentially (see reference). Figure 7 , Figure 8 (etc.). That is, the upper surface of the cam portion 130 is called the cam surface 130a. The height of the cam surface 130a gradually changes from the lowest point 130a1 to the highest point 130a2.

[0138] The eccentric pin 122 is cylindrical and extends vertically. The lower part of the eccentric pin 122 is inserted into a vertically oriented hole provided on the crank cam body 120. This hole is offset radially from the virtual central axis of the crank cam body 120.

[0139] The barrel roller 124 is a cylindrical component. The outer surface of the barrel roller 124 bulges out in such a way that the diameter increases towards the center in the vertical direction.

[0140] The barrel roller 124 is mounted on the upper part of the eccentric pin 122 via a bearing 126. The barrel roller 124 is supported so as to be able to rotate about a virtual axis of rotation in the vertical direction. The bearing 126 is a needle roller bearing.

[0141] The slider 6 has a slider body 136 and a saw blade retainer 138, which serves as a top tool retainer. The front end of the slider 6 protrudes from the front end of the power transmission housing 20.

[0142] The sliding body 136 is a cylindrical shape extending front to back. A barrel-shaped roller receiving part 140 is provided at the rear of the sliding body 136. The barrel-shaped roller receiving part 140 is a long cylindrical shape with a bottom extending left to right. The barrel-shaped roller receiving part 140 opens downward. The barrel-shaped roller receiving part 140 receives the barrel-shaped roller 124.

[0143] When the crank cam 108 rotates, the barrel roller 124 rotates eccentrically. Based on the forward and backward component of the movement of the barrel roller 124, the slider body 136 reciprocates in the forward and backward direction via the barrel roller receiving portion 140. The left and right component of the movement of the barrel roller 124 is the relative movement of the barrel roller 124 within the barrel roller receiving portion 140 and is not transmitted to the slider body 136.

[0144] The saw blade retainer 138 holds the saw blade (not shown) as the top tool. The saw blade retainer 138 automatically holds the saw blade by inserting it into the rear end of the saw blade (one-touch installation).

[0145] The saw blade retainer 138 bulges upwards, downwards, leftwards, and rightwards relative to the slider body 136. The slider 6 is the output part. The saw blade is the top tool. The saw blade is long and extends forwards and backwards during installation. The saw blade has a cutting edge on one long side. The cutting edge is a saw tooth. The saw blade is installed with the cutting edge facing downwards. Alternatively, the saw blade can also be installed with the cutting edge facing upwards. Furthermore, the saw blade can also have cutting edges on both long sides. The top tool can also be a tool other than the saw blade.

[0146] A cam sleeve 141 is provided on the outer periphery of the saw blade holder 138. The cam sleeve 141 is rotatable about the central axis of the saw blade holder 138 in the front-rear direction relative to the other parts of the saw blade holder 138. The cam sleeve 141 has a protrusion 142. The protrusion 142 protrudes radially outward relative to the other parts of the saw blade holder 138. When the saw blade holder 138 receives the saw blade, if the cam sleeve 141 rotates clockwise when viewed from the front, the saw blade can be removed.

[0147] The guide shoe mechanism 8 is configured adjacent to the saw blade mounted on the saw blade holder 138.

[0148] The counterweight mechanism 9 can be combined with the reciprocating motion conversion mechanism 5.

[0149] The counterweight mechanism 9 has a metal balancer 144 and a ring 145.

[0150] The balancer 144 is a plate-shaped device extending forward, backward, left, and right, with an elongated hole 146 extending in the left-right direction at its center. The portion of the balancer 144 that is forward of the elongated hole 146 is heavier than the portion that is backward of the elongated hole 146.

[0151] The engagement portion 127 of the crank cam 108 enters the elongated hole 146 of the balancer 144 through the ring 145.

[0152] In the portion of the balancer 144 that is forward of the elongated hole 146, a slit 147 extending forward and backward is provided. A rod 148 passes through the slit 147. The rod 148 extends vertically. The lower part of the rod 148 is held within the lower power transmission housing 20b.

[0153] In the lower part of the portion of the balancer 144 that is further rearward than the elongated hole 146, a recess 149 is provided that is recessed upward relative to its surrounding portion. The recess 149 avoids the upper rear part X of the lower power transmission housing 20b (see reference). Figure 3 ).

[0154] The balancer 144 reciprocates in the front-to-back direction due to the rotation of the crank cam 108. The connecting portion 127 is positioned on the opposite side of the barrel roller 124, across the center of the crank cam body 120. More specifically, the connecting portion 127 and the barrel roller 124 form an angle of approximately 175° with respect to the front-to-back and left-to-right centers of the crank cam body 120. Therefore, the portion of the balancer 144 forward of the elongated hole 146 moves substantially in the front-to-back direction in the opposite direction to the slider 6. Thus, vibrations generated by the reciprocating motion of the slider 6 are suppressed by the balancer 144. That is, the balancer 144 acts as a counterweight by moving in the opposite direction to the front-to-back motion of the slide plate 6. Furthermore, the left-to-right component of the movement of the connecting portion 127 becomes the relative movement of the connecting portion 127 within the elongated hole 146 and is not transmitted to the balancer 144. Additionally, the angle between the connecting portion 127 and the barrel roller 124 can be 180° or other angles.

[0155] The track mechanism 12 includes a slider support body 150, a plurality of (2) oilless bearings 151 serving as the slider support body, a plurality of (2) plates 152, a slider support shaft 153, a plurality of springs 154 serving as elastic bodies, bearings 156, and a plurality of screws 160.

[0156] The sliding bracket body 150, each oilless bearing 151, each plate 152, bearing 156, and each screw 160 constitute a cylindrical sliding bracket 161. Furthermore, bearings 156 and the like can be removed from the structural elements of the sliding bracket 161. Additionally, the structural elements of the sliding bracket 161 may include at least one of a sliding bracket shaft 153 and a spring 154.

[0157] The sliding bracket body 150 is made of metal and is box-shaped, extending in the front-to-back direction.

[0158] The oilless bearing 151 is held back and forth within the sliding support body 150. The cross-sectional shape of the oilless bearing 151 is square.

[0159] The sliding member 6 can reciprocate through each oilless bearing 151.

[0160] An opening is provided in the lower central portion of the sliding member support body 150, in a portion where the barrel roller 124 and the barrel roller receiving portion 140 can be located. Each oilless bearing 151 is disposed before and after this opening.

[0161] At the lower rear of the sliding bracket body 150, a rear plate 152 is fixed to the lower side of the rear oilless bearing 151 by a plurality of screws 160 in the vertical direction (two in the horizontal direction). The rear plate 152 is made of metal and extends in all directions. The sliding bracket body 150 holds the rear oilless bearing 151 from above. The rear plate 152 holds the rear oilless bearing 151 from below.

[0162] At the lower front of the sliding bracket body 150, a front plate 152 is fixed to the lower part of the front oilless bearing 151 by a plurality of screws 160 in the vertical direction (two in the horizontal direction). The front plate 152 is made of metal and extends in all directions. The sliding bracket body 150 holds the front oilless bearing 151 from above. The front plate 152 holds the front oilless bearing 151 from below.

[0163] Alternatively, plate 152 and screw 160 can be omitted.

[0164] Shaft holes 162 extending in the left and right directions are provided on the lower front part of the sliding bracket body 150. The periphery of the shaft holes 162 is fixed to the upper power transmission housing 20a.

[0165] The slider bracket shaft 153 passes through the left and right shaft holes 162. The slider bracket 161 can swing around the slider bracket shaft 153.

[0166] Each spring 154 is disposed on the left and right sides of the upper rear part of the sliding member support body 150. Each spring 154 extends in the vertical direction. The upper end of each spring 154 is held on the inner surface of the rear part of the upper power transmission housing 20a.

[0167] The bearing 156 is located behind the lower opening in the sliding member support body 150 and in front of the plate 152. The bearing 156 is a ball bearing.

[0168] The inner ring of bearing 156 is held against the outer surface of oilless bearing 151. The outer ring of bearing 156 is able to contact the cam surface 130a of crank cam 108.

[0169] The track switching mechanism 14 has a track switching rod 170 as a track switching component.

[0170] The track switching lever 170 has a lever body 172 as an axle and a gripper 174.

[0171] The main body 172 is a rod-shaped structure extending to the left and right, and is also axial.

[0172] Track switching rod 170 can rotate around the virtual central axis C of rod body 172 (see reference). Figure 7 , Figure 8The rotational state is maintained on the upper power transmission housing 20a. The virtual central axis C of the rod body 172 is parallel to the plate 152 it contacts.

[0173] The rod body 172 has a first plane 176 extending left and right as a support surface, and a second plane 178 extending left and right as a surface for a second track state. The first plane 176 and the second plane 178 form a predetermined angle (approximately 100° in this case). The distance from the central axis C to the first plane 176 is greater than the distance from the central axis C to the second plane 178.

[0174] When the orbit is in state 1 Figure 7 In the first track state, the track switching lever 170 is in a state where the first plane 176 can contact the lower rear part (rear plate 152) of the sliding bracket 161. When the track switching lever 170 contacts the plate 152, the first plane 176 is relative to the virtual vertical plane V (vertical plane, see reference). Figure 7 The virtual vertical plane V extends along both sides in the front-to-back direction, wherein the virtual vertical plane V includes a central axis C and is perpendicular to the first plane 176. That is, the first plane 176 spans the vertical plane V. In other words, the first plane 176 has a first portion 176a that is forward of the central axis C (vertical plane V) and a second portion 176b that is rearward of the central axis C (vertical plane V). Furthermore, Figure 4 This is a diagram with the vertical plane V as the cross-section.

[0175] On the other hand, when the orbit is in state 2 Figure 8 In the second track state, the track switching lever 170 is positioned so that the second plane 178 is spaced apart from the lower rear part of the slider bracket 161 and faces each other. In this state, the bearing 156 of the track mechanism 12 is in full circumferential contact with the cam surface 130a of the cam portion 130.

[0176] In the second track state, due to the downward loading force of each spring 154, the bearing 156 also contacts the lowest point 130a1 of the cam surface 130a in the cam portion 130 (see reference). Figure 8Even at this time, the second plane 178 of the rod body 172 will move away from the lower rear part of the slider bracket 161. Therefore, the slider bracket 161, slider 6, and saw blade move upwards (front high, rear low). Additionally, the bearing 156 also contacts the highest point 130a2 in the cam surface 130a. Thus, the bearing 156 is pushed upwards by the cam surface 130a, overcoming the loading force of each spring 154, while the slider bracket 161, slider 6, and saw blade move downwards (front low, rear high). The height of the portion between the lowest point 130a1 and the highest point 130a2 in the circumferential direction of the cam surface 130a gradually changes. Therefore, by rotating the crank cam 108, the bearing 156 moves up and down relative to the cam surface 130a. Therefore, the slider bracket 161, slider 6, and saw blade repeatedly move in a front-high-rear-low state, a forward-backward state, a front-low-rear-high state, and a forward-backward-backward state, while the saw blade holding part 138 moves in an elliptical orbit.

[0177] Based on the circumferential distribution of the height of the cam surface 130a in the crank cam 108, the track motion is associated with the reciprocating motion of the slider 6. Here, the height distribution of the cam surface 130a is adjusted so that when the slider 6 moves forward, the slider 6 is in a front-high-rear-low state; when the slider 6 switches its movement direction from front to rear (or passes near the switching point), the slider 6 is in a forward-backward state; when the slider 6 moves backward, the slider 6 is in a front-low-rear-high state; and when the slider 6 switches its movement direction from rear to front (or passes near the switching point), the slider 6 is in a forward-backward state.

[0178] Even if the orientation of the slider bracket 161 and the slider 6 changes to upward or downward, the slider 6 will still perform sufficient reciprocating motion through the barrel roller 124.

[0179] On the other hand, in the first track state, the rear part of the slider support 161 is lifted by the first plane 176 of the rod body 172, so the bearing 156 does not contact the lowest point 130a1 in the cam surface 130a and its adjacent part. Therefore, compared with the second track state, the front-high-rear-low configuration of the slider 6 can be suppressed. In contrast, the bearing 156 contacts the highest point 130a2 in the cam surface 130a and its adjacent part.

[0180] Furthermore, the bearing 156 contacts approximately half of the cam portion 130, but does not contact the first plane 176 of the rod body 172 in the remaining portion. Therefore, when the slider 6 moves rearward, the transition from a state along the front-rear direction to a state along the front-rear direction (the semi-elliptical arc-shaped track movement of the saw blade holding portion 138 when the slider 6 moves rearward) occurs in the same way as in the second track state, but when the slider 6 moves forward, the slider 6 maintains a state approximately along the front-rear direction. Therefore, in the first track state, the saw blade holding portion 138 moves in a semi-elliptical track.

[0181] In the first track state, the saw blade holding part 138 moves within a range of approximately half a circumference (the first range). In contrast, in the second track state, the saw blade holding part 138 moves within a full circumference range (the second range), which is wider than the range of approximately half a circumference (the first range).

[0182] Furthermore, in the first orbital state, orbital motion may not occur throughout the entire range, or the range of orbital motion (the proportion of presence or absence) may be altered. For example, the orbital motion may occur in a quarter-elliptical arc shape, while no orbital motion occurs in the remaining three-quarters. Similarly, in the second orbital state, orbital motion may not occur in a portion of the range. That is, when the range of orbital motion in the first orbital state (first range) is smaller than the range of orbital motion in the second orbital state (second range), the range of orbital motion can be varied.

[0183] The gripper 174 intersects with the main body 172 of the rod, and they are orthogonal here.

[0184] The gripper 174 is located on the left side of the power transmission housing 20 and the cover 22, and is exposed to the outside. The gripper 174 is disposed within the track switching rod hole 58 of the cover 22.

[0185] The user can operate the gripper 174 to rotate the track switching lever 170 around the central axis C, thereby switching the track status.

[0186] Figure 9 This is a three-dimensional view of the front of the reciprocating saw 1, viewed from the upper right front. Furthermore, in... Figure 9 In the text, the sliding shoe 229 of the guide shoe mechanism 8 is omitted (described later).

[0187] A gap exists between the left side of the power transmission housing 20 and the left side of the cover 22, through which the exhaust air WL for cooling from the fan 4 passes. The exhaust air WL is discharged to the outside from the exhaust ports 56 of each main body on the left side. Figure 1 ).

[0188] Similarly, a gap exists between the right side of the power transmission housing 20 and the right side of the cover 22, through which the exhaust air WR for cooling from the fan 4 passes. The exhaust air WR is discharged to the outside from the exhaust ports 56 of each main body on the right side. Figure 9 ).

[0189] Additionally, a protrusion portion 180, including a pair of protrusions extending in the front-rear direction, is formed on the upper part of the upper power transmission housing 20a. The protrusion portion 180 includes a pair of walls that protrude upward relative to adjacent portions. A receiving portion 180a for a lamp 62 is formed at the front end of the protrusion portion 180. Wires connecting the lamp 62 and the control circuit board 42 pass through the protrusion portion 180. The protrusion portion 180 receives the wires of the lamp 62.

[0190] The upper end of the protrusion 180 contacts the upper inner surface of the cover 22. Gap 181L and 181R, serving as first channels, are provided between the upper part of the upper power transmission housing 20a and the upper part of the cover 22, on both the left and right sides of the protrusion 180. Exhaust air W1 from the fan 4 passes through gaps 181L and 181R. Figure 2 and Figure 3 For convenience, the exhaust fan W1 is depicted as overlapping the protrusion 180, but in reality, the exhaust fan W1 almost entirely passes through the gaps 181L and 181R.

[0191] In addition, the first channel for exhaust can be divided into two channels, left and right, or into three or more channels.

[0192] A front wall 184 extending vertically and horizontally is provided at the front of the upper power transmission housing 20a. The front wall 184 is located on the front side of the slider bracket 161. The front wall 184 has a hole for the slider body 136 to pass through.

[0193] The upper power transmission housing 20a has a wall portion 186 in front of the front wall 184. The wall portion 186 protrudes downward from the upper inner surface of the upper power transmission housing 20a relative to the adjacent portion. Viewed from the rear, the wall portion 186 is semi-circular and surrounds the slider 6.

[0194] The upper power transmission housing 20a has a left hole 188L and a right hole 188R between the front wall 184 and the wall portion 186. The left hole 188L is located on the left side of the protrusion 180. The right hole 188R is located on the right side of the protrusion 180.

[0195] When exhaust air W1 enters the left hole 188L from above through gap 181L, it flows forward near the front of the left hole 188L. Therefore, without wall portion 186, exhaust air W1 enters the left hole 188L and flows towards the saw blade holding portion 138 (refer to exhaust air W2). Similarly, when exhaust air W1 enters the right hole 188R from above through gap 181R, it flows forward near the front of the right hole 188R. Therefore, without wall portion 186, exhaust air W1 enters the right hole 188R and flows towards the saw blade holding portion 138.

[0196] In the reciprocating saw 1, the exhaust air W1 branches through the wall portion 186 into an exhaust air W2 toward the saw blade holding portion 138 and an exhaust air W3 not toward the saw blade holding portion 138. That is, between the front wall 184 and the wall portion 186, the gaps 181L and 181R, which serve as the first channel, branch into a second channel 192 before the portion between the wall portion 186 and the slider 6 toward the saw blade holding portion 138, and a third channel 193 below the portion between the front wall 184 and the wall portion 186.

[0197] In addition, the left hole 188L and the right hole 188R can be either not divided into left and right parts, or they can be divided into more than three parts.

[0198] The lower power transmission housing 20b has a lower wall portion 196 that is symmetrical about the upper and lower sides relative to the wall portion 186. The lower wall portion 196 protrudes upward in an arc-shaped band from the lower inner surface of the lower power transmission housing 20b. The upper end of the lower wall portion 196 is in continuous contact with the lower end of the wall portion 186.

[0199] A front lower exhaust port 198, serving as a lower exhaust port, is provided at the lower part of the lower power transmission housing 20b and behind the lower wall portion 196. Figure 10 The lower part of the front wall 184 of the upper power transmission housing 20a is located behind the lower front exhaust port 198.

[0200] The portion between the lower wall 196 and the slider 6, and the portion between the wall 186 and the slider 6 together constitute the second channel 192. Figure 10 ).

[0201] The rear side of the lower wall portion 196 and the portion between the front wall 184 and the wall portion 186 together constitute the third channel 193. Figure 10 The third channel 193 extends to the front lower exhaust port 198. The exhaust air W3 comes into contact with the lower inner surface of the cover 22 through the gap of the guide shoe mechanism 8 from the front lower exhaust port 198, and is discharged to the outside from below the saw blade holding part 138 (around the root of the guide shoe mechanism 8) in a forward direction.

[0202] Inside the power transmission housing 20, a release mechanism 201 is provided on the front side of the wall portion 186 and the lower wall portion 196.

[0203] The release mechanism 201 is a mechanism that acts on the saw blade holding part 138 to remove the saw blade.

[0204] The release mechanism 201 has a release roller 202 and a tension spring 203.

[0205] The release roller 202 is cylindrical and housed within the power transmission housing 20. The wall portion 186 inhibits rearward movement of the release roller 202. The release roller 202 is adjacent to the saw blade holder 138. The release roller 202 is positioned around the cam sleeve 141. The release roller 202 is an operating roller used by the user to remove (release) the saw blade from the saw blade holder 138.

[0206] The release roller 202 has an inner raised portion 204 and an operating plate 206.

[0207] The inner bulge 204 is disposed on the inner surface of the release roller 202, and protrudes radially inward more than other parts of the inner surface of the release roller 202. The inner bulge 204 is disposed on the right side of the release roller 202.

[0208] The operating plate 206 is disposed on the right side of the release roller 202. The operating plate 206 protrudes radially outward relative to the other outer surfaces. In the solid line illustration, the operating plate 206 extends from the upper left to the lower right and unfolds along the front and back. The operating plate 206 is integrally formed with the other parts of the release roller 202 (the cylindrical release roller body). The operating plate 206 extends to the right from the first operating plate hole 212 provided in the power transmission housing 20 and the second operating plate hole 214 provided in the cover 22.

[0209] The tension spring 203 is a helical spring. The tension spring 203 is disposed circumferentially outside the release roller 202 and extends circumferentially along the release roller 202. The tension spring 203 is disposed within the power transmission housing 20.

[0210] The first end of the tension spring 203 has a hook shape and is engaged with the release roller 202. The second end of the tension spring 203 has a hook shape and is fixed to the lower power transmission housing 20b.

[0211] When the tension spring 203 is slightly extended from its natural length, the inner bulge 204 of the release roller 202 does not contact the protrusion 142 of the cam sleeve 141 in the saw blade holding state. At this time, the operating plate 206 of the release roller 202 contacts the lower ends of the first operating plate hole 212 and the second operating plate hole 214. Alternatively, the tension spring 203 can be in other states, such as its natural length.

[0212] The user can operate the lower operating piece 206 upwards, causing the release roller 202 to rotate about its front-to-back axis against the loading force of the tension spring 203. In this case, the rotation of the release roller 202 causes the inner bulge 204 to contact the protrusion 142 of the cam sleeve 141, thereby causing the cam sleeve 141 to rotate clockwise when viewed from the front. This rotation of the cam sleeve 141 releases the saw blade from the saw blade holding part 138. The released saw blade is then pushed forward by the saw blade holding part 138.

[0213] Therefore, the release roller 202 of the release mechanism 201 is linked with the inner saw blade holding part 138. By operating the operating plate 206 upward, the saw blade is released from the saw blade holding part 138.

[0214] In addition, the operating roller can also be a component that replaces the saw blade release operation, or performs the saw blade installation operation together with the saw blade release operation.

[0215] The exhaust air W2 toward the saw blade holding part 138 is discharged outward and forward through the space between the release roller 202 and the sliding member 6.

[0216] Figure 10 yes Figure 2 A magnified view of the front section. Figure 11 Viewed from above Figure 2 Partial three-dimensional exploded view of the guide shoe mechanism 8 and its surrounding components. Figure 12 Viewed from below Figure 2 Partial three-dimensional exploded view of the guide shoe mechanism 8 and its surrounding components. Figure 13 yes Figure 10 BB cross-sectional view. Figure 14 yes Figure 10 CC section view. Figure 15 yes Figure 10 DD sectional view. Figure 16 yes Figure 10 EE sectional view.

[0217] The guide shoe mechanism 8 is located on the front and lower sides of the slider 6.

[0218] The guide shoe mechanism 8 has a slip shoe plate 220, a guide shoe plate 222, a slip shoe bracket 226, multiple (2) shafts 227, a pin mechanism 228, a locking rod 249, and a slip shoe bracket locking shaft 250.

[0219] The sliding shoe 229 is composed of the sliding shoe plate 220, the sliding shoe bracket 226, and each axle 227.

[0220] The slipper plate 220 is made of metal, specifically iron. The front surface of the slipper plate 220 is capable of contacting the workpiece. Left-right oriented shaft holes 220F are provided on the lower left and lower right portions of the slipper plate 220, respectively.

[0221] The guide shoe plate 222 is made of metal, specifically iron. The guide shoe plate 222 is fixed to the lower part of the lower power transmission housing 20b by vertical screws 230 and horizontal screws 232. Screws 230 enter a threaded boss 234 formed in the lower power transmission housing 20b. Screws 232 enter threaded holes 236 formed in the horizontal direction of the lower power transmission housing 20b. Screws 232 engage with a nut 237 on the left side. The guide shoe plate 222 is positioned between the lower front outer surface of the lower power transmission housing 20b and the lower front inner surface of the cover 22.

[0222] The cross section of the guide shoe plate 222 is U-shaped. The guide shoe plate 222 has a base plate portion 222B and a left wall portion 222L and a right wall portion 222R that rise from the left and right sides of the base plate portion 222B.

[0223] The guide shoe plate 222 has a threaded hole 222F, a plurality of (2) threaded holes 222G, a plurality of (4) holes 222H, and a plurality of (2) holes 222I. The threaded hole 222F is located at the rear end of the base plate portion 222B. A screw 230 passes through the threaded hole 222F. Each threaded hole 222G is located at the front end of the left wall portion 222L and the front end of the right wall portion 222R. A screw 232 passes through each threaded hole 222G. The screw 232 is located above the slipper bracket 226. Each hole 222H is located in the base plate portion 222B. Each hole 222H is arranged in the front-rear direction. Each hole 222H is arranged at equal intervals. Each hole 222I is located behind the threaded holes 222G in the left wall portion 222L and behind the threaded holes 222G in the right wall portion 222R.

[0224] Furthermore, although the main body shell 2 does not include the guide shoe plate 222, it can also be treated as if the main body shell 2 includes the guide shoe plate 222.

[0225] The slipper bracket 226 is made of metal, specifically iron. It is positioned inside the guide shoe plate 222. The slipper bracket 226 is slidable back and forth within the guide shoe plate 222. It is located between the lower front outer surface of the lower power transmission housing 20b and the lower front inner surface of the guide shoe plate 222. The guide shoe plate 222 guides the sliding of the slipper bracket 226.

[0226] The cross-section of the skate support 226 is U-shaped. The skate support 226 has a base plate 226B and a left wall 226L and a right wall 226R that rise from the left and right sides of the base plate 226B.

[0227] The skate shoe bracket 226 has multiple (2) shaft holes 226F, multiple (6) left locking portions 226K, multiple (6) right locking portions 226Q, multiple (2) holes 226H1 and one hole 226H2, and a front-to-back cutout 226S. Each shaft hole 226F is located at the front end of the left wall portion 226L and the front end of the right wall portion 226R. Each left locking portion 226K is a recessed portion located at the center of the upper side of the left wall portion 226L, recessed downwards in an arc shape, and arranged in the front-to-back direction. Each right locking portion 226Q is a recessed portion located at the center of the upper side of the right wall portion 226R, recessed downwards in an arc shape, and arranged in the front-to-back direction. Holes 226H1 and 226H2 are located on the base plate portion 226B and are arranged in the front-to-back direction. The sliding shoe bracket 226 can be made lighter by using holes 226H1 and 226H2.

[0228] The cut 226S extends forward from the rear end of the base plate portion 226B. A left protrusion 226J is provided on the left side of the rear end edge of the cut 226S. The left protrusion 226J protrudes inward in the left-right direction, i.e., to the right side, from the left side of the cut 226S. A right protrusion 226P is provided on the right side of the rear end edge of the cut 226S. The right protrusion 226P protrudes inward in the left-right direction, i.e., to the left side, from the right side of the cut 226S. The left protrusion 226J and the right protrusion 226P face each other with a gap smaller than the width of the other parts of the cut 226S (the size in the left-right direction), i.e., the width of the cut. The portion between the left protrusion 226J and the right protrusion 226P forms the narrow section of the cut 226S, where the width of the cut 226S narrows. Furthermore, either the left protrusion 226J or the right protrusion 226P can be omitted.

[0229] The guide shoe plate 222 does not reach the front end of the cover 22. Therefore, the slipper bracket 226 contacts the contact portion 22T, which is the inner surface of the lower part of the front end of the cover 22. The contact portion 22T protrudes radially inward (upward) relative to the other parts of the inner surface of the front part of the cover 22.

[0230] At the lower part of the cover 22, and below the center portion of the guide shoe plate 222, a bulge 22P is formed that bulges downward relative to the rear side of the guide shoe plate 222. The bulge 22P is separate from the guide shoe plate 222, and a space exists within the bulge 22P.

[0231] Furthermore, the lower front portion of the lower power transmission housing 20b has the same width as the left wall portion 226L of the guide shoe bracket 226 and the right wall portion 226R of the guide shoe bracket 226. The bottom of the lower front portion of the lower power transmission housing 20b has multiple ribs that protrude downwards relative to other portions. These ribs on the bottom of the lower front portion of the lower power transmission housing 20b form multiple upwardly recessed recesses.

[0232] When the slipper bracket 226 is at the rearmost position (the rearmost sliding position shown in the figure), the screw 230 and the threaded boss 234 used to fix the guide shoe plate 222 are located inside the cutout 226S and behind the left protrusion 226J and the right protrusion 226P.

[0233] Each shaft 227 is positioned to the left and right of the front end of the slipper bracket 226. Each shaft 227 supports the slipper plate 220 so that it can swing about an axis in the left-right direction. Each shaft 227 passes through the shaft hole 220F of the slipper plate 220 and the shaft hole 226F of the slipper bracket 226 located inside it in the left-right direction.

[0234] The pin mechanism 228 has a pin 240, a compression spring 242 as an elastic body, and a ring spring 244 as an elastic body.

[0235] The pin mechanism 228 can enter the cylindrical recess 238 with an upper bottom on the lower front surface of the lower power transmission housing 20b.

[0236] Pin 240 extends in the vertical direction. Pin 240 has a small diameter portion 240A, a large diameter portion 240B, and a cylindrical portion 240C.

[0237] The small-diameter portion 240A is cylindrical and is located at the lower end. The diameter of the small-diameter portion 240A is smaller than the gap between the left convex portion 226J and the right convex portion 226P.

[0238] The large-diameter portion 240B is cylindrical. The diameter of the large-diameter portion 240B is larger than the diameter of the small-diameter portion 240A. The diameter of the large-diameter portion 240B is greater than the distance between the left convex portion 226J and the right convex portion 226P. The large-diameter portion 240B is positioned above the small-diameter portion 240A. The large-diameter portion 240B and the small-diameter portion 240A are concentric.

[0239] The cylindrical portion 240C is positioned above the large-diameter portion 240B. The outer diameter of the cylindrical portion 240C is larger than the outer diameter of the large-diameter portion 240B. The cylindrical portion 240C is concentric with the small-diameter portion 240A and the large-diameter portion 240B.

[0240] Compression spring 242 is a cylindrical helical spring. Compression spring 242 enters the cylindrical portion 240C. Compression spring 242 is concentric with the small diameter portion 240A, the large diameter portion 240B, and the cylindrical portion 240C.

[0241] The lower end of the compression spring 242 contacts the lower bottom of the cylindrical portion 240C. The upper end of the compression spring 242 contacts the upper bottom of the recess 238.

[0242] The compression spring 242 applies downward force to the pin 240.

[0243] With the compression spring 242 at or near its natural length, the lower end of the pin 240 is adjacent to the upper surface of the bulge 22P. Furthermore, the small-diameter portion 240A passes through the hole 222H in the guide shoe plate 222. The large-diameter portion 240B enters the cutout 226S of the slide shoe bracket 226. When the slide shoe 229 is in its rearmost sliding position, the pin 240 enters the front end of the cutout 226S. When the slide shoe 229 is in its rearmost sliding position, the slide shoe bracket 226 enters the main body 69 of the reciprocating saw 1 to the maximum extent within its sliding range. The sliding range of the slide shoe 229 is the lockable range of movement in the front-to-back direction of the slide shoe 229.

[0244] An annular spring 244 secures pin 240 to the lower power transmission housing 20b. The annular spring 244 is positioned radially outward of pin 240. The annular spring 244 is also positioned at the upper end of the large-diameter portion 240B of pin 240.

[0245] The annular spring 244 engages with the inner surface of the recess 238 in the lower power transmission housing 20b. This prevents the pin mechanism 228 from disengaging from the recess 238.

[0246] A locking lever 249 for locking or unlocking the slipper 229 is disposed on the outer side of the guide shoe plate 222. When closed, the locking lever 249 appears as a forward-opening "U" shape when viewed from above.

[0247] A slide shoe bracket locking shaft 250 is connected to the locking rod 249 in the left-right direction above the slide shoe bracket 226. The locking rod 249 can rotate together with the slide shoe bracket locking shaft 250 about the axis of the slide shoe bracket locking shaft 250, and can be opened and closed relative to the cover 22.

[0248] The slipper bracket retainer 250 passes through a hole 251 formed in the left-right direction in the lower power transmission housing 20b. The pin mechanism 228 and the recess 238 are disposed on the rear side of the hole 251.

[0249] The slipper bracket stops the shaft 250 through the holes 222I of the guide shoe plate 222.

[0250] The left and right ends of the slipper bracket retaining shaft 250 each have a "D" shaped cross section. That is, the slipper bracket retaining shaft 250 is cylindrical and has a left flat portion 250F, a right flat portion 250G, a left cylindrical portion 250C connected to the left flat portion 250F, and a right cylindrical portion 250D connected to the right flat portion 250G.

[0251] When the locking lever 249 is closed (as shown in the state of contact with the cover 22), the slipper bracket locking shaft 250 fixes the slipper 229. That is, the left cylindrical part 250C of the slipper bracket locking shaft 250 enters either of the left locked parts 226K of the slipper bracket 226, and the right cylindrical part 250D enters the right locked part 226Q corresponding to the left locked part 226K in the front-back direction. The slipper bracket locking shaft 250 is locked in the slipper bracket 226, thereby inhibiting the sliding of the slipper bracket 229.

[0252] On the other hand, when the locking lever 249 is opened, the fixation of the slide shoe 229 by the slide shoe bracket locking shaft 250 is released. That is, the left cylindrical part 250C of the slide shoe bracket locking shaft 250, which rotates together with the locking lever 249, disengages from the left locked part 226K, and the right cylindrical part 250D disengages from the right locked part 226Q, causing the slide shoe bracket locking shaft 250 to move away from the slide shoe bracket 226, thereby releasing the lock of the slide shoe bracket 226 and allowing the slide shoe 229 to slide. Therefore, the slide shoe 229 can slide in the front-back direction, and the position of the slide shoe 229 can be adjusted. At this time, the left locked part 226K faces the left flat part 250F. In addition, the right locked part 226Q faces the right flat part 250G.

[0253] When the position of the slipper 229 is adjusted and the locking lever 249 is closed, the left cylindrical part 250C of the slipper bracket locking shaft 250 enters either the left locking part 226K of the slipper bracket 226, and the right cylindrical part 250D enters the right locking part 226Q corresponding to the left locking part 226K, so that the slipper 229 is locked in the adjusted position.

[0254] The locking rod 249 and the slipper bracket locking shaft 250 constitute the slipper locking mechanism 254.

[0255] With the locking lever 249 open, when the slide shoe 229 moves forward, the pin 240 of the pin mechanism 228 moves rearward relative to the cutout 226S of the slide shoe bracket 226. Then, when the slide shoe 229 moves forward a predetermined distance, under normal conditions, the large diameter portion 240B of the pin 240 contacts the left protrusion 226J and the right protrusion 226P, and the pin 240 interferes with the slide shoe 229. Therefore, it is possible to prevent the slide shoe 229 from moving forward beyond a predetermined distance (the foremost sliding position), thereby preventing the slide shoe 229 from falling off.

[0256] The slipper bracket 226 has multiple (2) markings 226M. Each marking 226M indicates the aforementioned foremost sliding position. Alternatively, some or all of the markings 226M may be omitted.

[0257] When the slide shoe 229 is in the foremost sliding position, the slide shoe bracket 226 is exposed to the maximum extent from the main body 69 of the reciprocating saw 1 within the sliding range.

[0258] On the other hand, when the pin 240 is pushed upward by the bulge 22P of the cover 22 overcoming the loading force of the compression spring 242, the large diameter portion 240B is located above the cutout 226S and disengages from the cutout 226S, while the small diameter portion 240A is located inside the cutout 226S.

[0259] Therefore, in this case, when the slipper 229 moves further forward, the slipper 229 passes between the left protrusion 226J and the right protrusion 226P of the small diameter portion 240A, thereby disengaging from the pin 240 without being locked and separating from the other parts of the reciprocating saw 1.

[0260] Install the detached skates following the reverse procedure of the detachment process.

[0261] Furthermore, the pin operating portion used to move the pin 240 is not limited to the protruding portion 22P. For example, the pin operating portion may also be a recessed portion relative to the surrounding area.

[0262] In addition, such as Figure 16 As shown, a plate 260 is disposed behind the skid support 226. The plate 260 is made of a metal harder than the lower power transmission housing 20b made of aluminum alloy, more specifically, it is made of iron. The plate 260 extends upwards, downwards, leftwards, and rightwards. When viewed from the front, the plate 260 is a thick "U" shape that opens upwards.

[0263] Plate 260 is disposed on the surface 20b1 below the rod 148 in the lower power transmission housing 20b, which extends along the front, back, left, and right sides. Figure 11 The plate 260 is located to the left and right of the mounting portion of the rod 148 in the lower power transmission housing 20b, avoiding the rod 148 and its mounting portion. The plate 260 is positioned behind the screw 230 and the threaded boss portion 234. The plate 260 is housed between the lower power transmission housing 20b and the rear end of the guide shoe plate 222.

[0264] Even when the skate 229 is in the rearmost sliding position, the rear end of the skate support 226 will not contact the plate 260. The plate 260 contacts the skate support 226, which has moved to a position further rear than the rearmost sliding position due to external forces, etc.

[0265] Unlike the reciprocating saw 1, without the plate 260, the iron slipper bracket 226 directly contacts the softer lower drive transmission housing 20b, which may cause deformation of the lower drive transmission housing 20b. Therefore, by installing the plate 260 as in the reciprocating saw 1, the impact force of the slipper bracket 226 can be mitigated, and deformation of the lower drive transmission housing 20b can be suppressed.

[0266] Furthermore, unlike the reciprocating saw 1, when the rear end of the slipper bracket 226 is bent to form an upright portion, although the impact force is mitigated by the upright portion, an impact exceeding a certain level may cause the bent portion to break. In this regard, if the plate 260 and the slipper bracket 226 are set separately, as in the reciprocating saw 1, the impact force of the slipper bracket 226 can be suppressed for a longer period of time.

[0267] The action of this reciprocating saw 1 will be explained using an example.

[0268] The user places the saw blade in the saw blade holding part 138 of the slider 6 in the stopped state. Typically, the saw blade is positioned with the cutting edge (acting part) facing downwards so that it acts on the workpiece from above. However, sometimes the saw blade is positioned upwards, for example, when the saw blade acts on the workpiece from below.

[0269] The user adjusts the length of the slipper 229 appropriately and places the front surface of the slipper plate 220 against the workpiece. The user then installs the charged battery 54 into the battery mounting section 50. Additionally, the user operates the speed setting dial 36 to select the speed.

[0270] Then, when the user holds the first grip portion 30 (and the second grip portion 60) and pulls the trigger 33 to a predetermined amount, the trigger switch body 34 is activated, supplying power to the motor 3, thereby causing the motor shaft 80 to rotate. The motor 3 is powered by DC power rectified by the controller 40. Furthermore, when the trigger 33 is pulled to a certain amount or more, the lamp 62 illuminates. This certain amount is less than the predetermined amount of power supplied to the motor 3.

[0271] The microcomputer of the controller 40 obtains the rotational state of the rotor 72 from the sensor board 75. Furthermore, based on the obtained rotational state, the microcomputer of the controller 40 controls the switching elements to open and close, causing current to flow sequentially through each coil 73 of the stator 71, thereby rotating the rotor 72. Generally, the controller 40, being a brushless motor, may generate heat due to the drive of the microcomputer, etc. Furthermore, if heat accumulates in the controller 40, it may sometimes affect the operation of the controller 40.

[0272] The motor shaft 80 rotates at a speed corresponding to the signal (trigger 33 engagement amount) of the engaged trigger switch body 34. The greater the engagement amount of the trigger 33, the higher the speed of the motor shaft 80. In addition, the maximum speed of the motor shaft 80 is controlled by the controller 40 to a speed corresponding to the rotation state of the speed setting dial 36.

[0273] When the motor shaft 80 rotates, the crank cam 108 rotates via the bevel gear 100, torque limiting mechanism 102, intermediate shaft 104, and crank base 106, causing the slider 6 to move back and forth. In addition, the balancer 144 moves in the opposite direction to the slider 6 in the back and forth direction, and the slider 6 moves back and forth in a state where vibration is suppressed.

[0274] The slider 6 is guided in a state where it is prevented from sliding in a direction other than the slider support body 150 by the front and rear oilless bearings 151.

[0275] When the user moves the handle 174 of the track switching lever 170 forward (refer to...) Figure 1 (Double-dotted line in the middle), the second plane 178 of the rod body 172 is in a state of extending forward, backward, left and right (refer to the double-dotted line in the middle). Figure 8 ), and away from the rear plate 152. The bearing 156 of the track mechanism 12 advances relative to each other along the full circumference of the cam surface 130a of the crank cam 108, and causes the slider support body 150 to swing in coordination with the reciprocating motion of the slider 6. Therefore, track motion (second track state) occurs throughout the entire reciprocating motion of the slider 6.

[0276] Additionally, when the user lowers the gripper 174 of the track switching lever 170 backward (see reference...), Figure 1 When the solid line in the middle is in the state of extending forward, backward, left and right (refer to the solid line in the middle), the first plane 176 of the rod 172 is in a state of extending forward, backward, left and right (refer to the solid line in the middle). Figure 7 The rear plate 152 is in a liftable state. The bearing 156 of the track mechanism 12 advances relative to the cam surface 130a of the crank cam 108 only about half a circumference, and only within about half a circumference, it causes the slider support body 150 to swing in coordination with the reciprocating motion of the slider 6. In the remaining about half a circumference, it does not contact the cam portion 130, maintaining the posture of the slider support body 150. Therefore, track motion (first track state) occurs in about half of the reciprocating motion of the slider 6.

[0277] When the user moves the saw blade downward toward the workpiece while the slider 6 or the saw blade is in working condition, the cutting edge of the back-and-forth moving saw blade contacts the workpiece, thereby cutting the workpiece.

[0278] The second track state is suitable for cases where the workpiece is, for example, wood. Conversely, the first track state is suitable for cases where the workpiece is, for example, metal.

[0279] Furthermore, as the fan 4 rotates along with the motor shaft 80, the air around the fan 4 is pushed radially outward. Therefore, the airflow (wind) travels from each air inlet 31 through the motor housing 18 to the fan 4, and then to the main body exhaust port 56 and each lower exhaust port 48, respectively. That is, exhaust winds WD, WL, WR, W1 to W3, etc., are generated.

[0280] The various components inside the main body shell 2 are cooled by this wind.

[0281] In particular, the motor 3 is cooled by the air intake from each air intake 31 to the fan 4. The air intake passes between the stator 71 and the rotor 72, cooling the stator 71 and the rotor 72. In addition, the air intake passes through the interior of the stator 71, cooling the stator 71.

[0282] Additionally, the exhaust air WL and WR from the fan 4 to the exhaust vents 56 of each main body passes through the outside of the power transmission housing 20. Therefore, the power transmission housing 20 and its internal components are cooled by the exhaust air WL and WR.

[0283] Furthermore, the controller 40 is cooled by the exhaust air WD from the fan 4 to each of the lower exhaust vents 48. The exhaust air WD passes over the controller housing 44 side covering the control circuit board 42. Therefore, the exhaust air WD sufficiently cools the control circuit board 42.

[0284] Furthermore, exhaust air W1 passes above the power transmission housing 20, exhaust air W2 passes radially inside the release roller 202, and exhaust air W3 passes in front of the power transmission housing 20. Therefore, the power transmission housing 20, its internal components, and the components in front of it are cooled by exhaust air W1 to W3. Also, since exhaust air W1 branches into exhaust air W2 and W3, the airflow of exhaust air W2 towards the saw blade holding section 138 can be suppressed compared to the unbranched case. Therefore, the occurrence of dust flying off the workpiece can be suppressed. Although exhaust air W3 ultimately faces forward, it faces forward around the guide shoe mechanism 8 below the saw blade holding section 138, rather than towards the saw blade holding section 138 itself; therefore, the occurrence of dust flying off the workpiece can be suppressed.

[0285] When the user disengages the trigger switch body 34 by operating trigger 33, the motor shaft 80 of motor 3 stops, thereby halting all forward and backward movements and air intake / exhaust. Additionally, after a predetermined time, the lamp 62 turns off.

[0286] When the user opens the locking lever 249, even if the pin 240 is pulled forward significantly without pushing it through the bulge 22P of the cover 22, the slide shoe 229 will remain in the foremost sliding position and will not disengage because the large diameter portion 240B of the pin 240 interferes with the left protrusion 226J and the right protrusion 226P. The slide shoe bracket 226 has a rear end that protrudes further rearward than the left protrusion 226J and the right protrusion 226P, thus the slide shoe bracket 229 can be stably supported even in the foremost sliding position. By closing the locking lever 249, the user locks the slide shoe 229 in the foremost sliding position, making it easy to set the slide shoe 229 in the foremost sliding position. The slide shoe 229 in the foremost sliding position is locked to the rearmost left locking portion 226K and right locking portion 226Q.

[0287] On the other hand, when the user opens the locking lever 249, by pushing the pin 240 through the bulge 22P of the cover 22, the pin 240 can be prevented from interfering with the left protrusion 226J and the right protrusion 226P. The slide shoe 229 can then move forward beyond its foremost sliding position and be pulled out. The user can separate the slide shoe 229 by operating the raised portion 22P (pin 240) located adjacent to (behind) the opened locking lever 249, thus facilitating the separation of the slide shoe 229.

[0288] Furthermore, the methods and modifications of the present invention are not limited to those described above. For example, the following modifications may be suitably implemented for the methods and modifications of the present invention.

[0289] In the pin mechanism 228, the lower end of the large-diameter portion 240B of the pin 240 can be rounded, or the shape of the pin 240 can be spherical. In these cases, when the slide shoe 229 is pulled out to the foremost sliding position without operating the pin 240, once hooking occurs and the slide shoe 229 is pulled forward with a pulling force exceeding a specified level, the pin 240 straddles the left protrusion 226J and the right protrusion 226P, and the slide shoe 229 can move above the foremost sliding position, thereby allowing it to be pulled out. Alternatively, by reversing the steps, the disengaged slide shoe 229 can be reinstalled.

[0290] The track motion (trajectory motion) of the saw blade retainer 138, etc., is not limited to elliptical and semi-elliptical shapes. For example, the track motion can be reciprocating (oscillating) on ​​a virtual semi-elliptical arc.

[0291] The first plane 176 may not be a continuous plane including the first portion 176a and the second portion 176b. For example, the first plane 176 may also have a first portion 176a as a plane and a second portion 176b as a plane away from the first portion 176a, by which the slider 6 is directly or indirectly supported. At least one of the first portion 176a and the second portion 176b may be a protrusion that projects relative to the surrounding portion.

[0292] The cam portion 130, when viewed from above, can be arc-shaped, straight, or curved. The cam portion 130 can be disposed on the lower surface of the crank cam 108. The cam portion 130 can be formed separately from the crank cam 108.

[0293] A portion or all of the reciprocating motion conversion mechanism 5 and at least one of the track switching mechanism 14 (track switching rod 170) may be configured above the sliding support 161.

[0294] Instead of using a crank cam 108 extending in all directions (horizontal crank type), the reciprocating motion conversion mechanism 5 can be configured to use a crank and connecting rod (connecting rod type), or it can be configured to use a rotating body with an inclined cylindrical surface and a swashplate bearing disposed on the inclined cylindrical surface (swashplate type).

[0295] The main body exhaust port 56 can be located in the portion of the cover 22 that is forward of the reciprocating motion conversion mechanism 5. The main body exhaust port 56 can be located in the power transmission housing 20. The lower exhaust port 48 can be located on the outside of the controller 40.

[0296] Cover 22 can be a split component having a left cover and a right cover.

[0297] Various changes can be made to the presence, quantity, material, shape, form, and configuration of various components. For example, a needle bearing can be used instead of a ball bearing, or a ball bearing can be used instead of a needle bearing. At least one of the torque limiting mechanism 102 and the intermediate shaft 104 can be omitted. Alternatively, the size, configuration, or quantity of at least one of the air inlet 31, the main body exhaust port 56, and the lower exhaust port 48 can be changed. Or, the installation and removal direction of the battery 54 can be changed from the front to the rear direction. Or, the number of installable batteries 54 can be changed to multiple, etc.

[0298] The top tool can be any tool other than a saw blade.

[0299] It can replace the power supply provided by battery 54, and be powered by a wire. The wire can be connected to a commercial power source.

[0300] The present invention and its variations can be applied to reciprocating cutting tools other than reciprocating saws (e.g., wire saws), as well as to reciprocating tools other than reciprocating cutting tools, power tools, gardening tools, and electric work machines.

Claims

1. A reciprocating cutting tool, characterized in that, It comprises a motor, a rod-shaped slider, a reciprocating motion conversion mechanism, a sliding shoe, a sliding shoe locking mechanism, and a pin, wherein... The slider has a top tool holding part at its top end to hold the top tool. With the extension direction of the slider as the front-back direction, the reciprocating motion conversion mechanism converts the rotation of the motor into a reciprocating motion in the front-back direction and transmits it to the slider; The slipper is adjacent to the top tool holding part, can contact the workpiece acted upon by the top tool, and can slide in the front-back direction. The slipper has a slipper plate and a slipper bracket, wherein the slipper plate contacts the workpiece; the slipper bracket supports the slipper plate, and the slipper bracket has a front-back extending slit, the slit having a slit narrowing portion for narrowing its width. The slipper locking mechanism can lock the slipper in place; The pin is capable of interfering with the slipper. The pin has a small-diameter portion and a large-diameter portion, wherein the small-diameter portion has a diameter smaller than the width of the narrow slit portion, and the large-diameter portion has a diameter larger than the width of the narrow slit portion. The slipper locking mechanism inhibits slipping of the slipper by locking it in place, and allows slipping by releasing the locking mechanism. When the slipper slides to the designated position, the pin enters the cut and interferes with the narrow part of the cut.

2. The reciprocating cutting tool according to claim 1, characterized in that, Through manipulation, the pin can be moved to a position that does not interfere with the narrow part of the incision. The slipper can be separated from the part outside the slipper without being blocked by the slipper locking mechanism or interfered with by the pin.

3. The reciprocating cutting tool according to claim 2, characterized in that, The pin is applied force to the location of the interference slipper.

4. The reciprocating cutting tool according to any one of claims 1 to 3, characterized in that, The pin is adjacent to the slipper locking mechanism.

5. The reciprocating cutting tool according to claim 1, characterized in that, The ski shoe support extends in the front-to-back direction and has a base plate, a left wall portion erected from the left side of the base plate, and a right wall portion erected from the right side of the base plate.

6. The reciprocating cutting tool according to claim 5, characterized in that, The slipper locking mechanism has a slipper bracket locking shaft, which is cylindrical with a flat portion and a cylindrical portion, and is capable of rotating about a central axis. At least one of the left wall portion and the right wall portion has a locking portion, which is locked by the cylindrical face of the sliding shoe bracket locking shaft. By rotating the locking shaft of the slipper bracket, the flat part faces the locked part, and the cylindrical part disengages from the locked part, thereby releasing the locking shaft of the slipper bracket from the slipper.

7. The reciprocating cutting tool according to claim 5 or 6, characterized in that, The slipper plate is supported on at least one of the left wall portion and the right wall portion.

8. The reciprocating cutting tool according to any one of claims 1 to 3, characterized in that, A guide plate is provided to guide the slipper bracket.

9. The reciprocating cutting tool according to claim 8, characterized in that, The guide shoe plate has a hole through which the pin passes.

10. The reciprocating cutting tool according to claim 8, characterized in that, A power transmission housing is provided to maintain the reciprocating motion conversion mechanism.

11. The reciprocating cutting tool according to claim 10, characterized in that, The slipper bracket is disposed between the power transmission housing and the guide shoe plate.

12. The reciprocating cutting tool according to claim 11, characterized in that, The guide shoe plate is fixed to the power transmission housing by screws. The screw passes through the cut.

13. The reciprocating cutting tool according to any one of claims 1 to 3, characterized in that, The specified position is the foremost position where the slipper is locked by the slipper locking mechanism.

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