TWI707756B - Power reciprocating saw - Google Patents

Abstract

A Power Reciprocating Saw, include a body, a planetary gear set, an eccentric wheel, a sliding piece, a driven shaft, it is vertical to eccentric wheel, two reciprocating sliding pieces, a fixed piece, a cone piece, a ring, a holder. The eccentric wheel defined with isometric gear shafts on one side, and eccentric shaft on the opposite. The driven shaft is defined round around with U groove, and a pass through bar, the bar mounted with two reciprocating sliding pieces on both end. As the planetary set turn around, to drive the eccentric wheel enable the eccentric shaft and sliding piece turn around. The sliding piece push the U groove of driven shaft to drive the driven shaft move along the X axial, for the U groove and two reciprocating sliding pieces are limited by the boundary of the fixed piece. The blade, it is mounted into the driven shaft by the ring and cone piece, following the driven shaft move along the x axial direction.

Description

Power reciprocating saw

The invention relates to a power reciprocating saw

Commercially available electric reciprocating saws use the bevel gear structure to decelerate and change the direction of rotation, and then use the eccentric shaft on the bevel gear to drive the U-shaped driven device for reciprocating motion.

Bevel gears require high machining accuracy, high cost, and long time. Moreover, the structure for changing the direction of rotation is complicated, and the volume is large, and it consumes more energy.

In view of this, it is indeed necessary to improve the above shortcomings, the present invention is simple in structure, small in size, and energy saving.

The purpose of the present invention is to solve the problems of high cost, large volume, energy consumption and the like caused by the complicated structure of the electric reciprocating saw.

In order to achieve the foregoing objective, the present invention is an electric reciprocating saw, which includes; a body with a motor; an eccentric disk member with an eccentric disk transmission section and an eccentric disk bearing section, and the end face of the eccentric disk transmission section has a plurality of equally spaced transmission section gears. The shaft, another eccentric disc bearing section has an eccentric shaft on the end face of the bearing section.

A sliding piece with an outer circumference of the sliding piece and an inner circular hole of the sliding piece, sleeved on the eccentric shaft of the bearing section of the eccentric disc piece.

A driven shaft is placed perpendicular to the eccentric disc, and has a driven section and a knife segment. A U-shaped groove of the driven shaft is provided outside the driven segment, and a penetrating round bar is sleeved with a through hole. The knife segment has a knife segment. The one-shaped groove is perpendicular to the U-shaped groove of the driven shaft, the round hole of the outer blade segment is perpendicular to the one-shaped groove of the blade segment, and the groove of the one blade segment.

Two reciprocating sliding parts, the outer circumference of the reciprocating sliding part is provided with an inner circular hole of the reciprocating sliding part sleeved on the two ends of the driven shaft through the round rod.

A tapered baffle with a small tapered surface and a large tapered surface. The small tapered surface is sleeved in the circular hole of the knife section of the driven shaft.

The blade fixing ring has a flange and a accommodating space, and is sleeved on the blade segment of the driven shaft.

A fixed part with a transmission accommodating section and a driven accommodating section. The transmission accommodating section has the outer circumference of the transmission accommodating section. There are two concentric circles inside, which are successively the sliding part, in which the sliding part slides, and the transmission bearing The section is sleeved with a transmission bearing, the eccentric disc is sleeved in the transmission bearing, the outside of the driven accommodating section is square, one end has a driven bearing section, and a driven bearing is sleeved, the outer side has a fixed part limiting surface, and the other end has a polygonal shape The groove is the U-shaped limiting surface of the fixing member and the limiting surface of the driven sliding member of the fixing member. The driven shaft is sleeved in the driven accommodating section, and there are 4 fixing member screw holes on it.

The fixing frame has a fixing frame slot hole for passing through the blade, and the fixing frame limiting surface and the fixing frame screw hole are fixed on the fixing member.

A gear box with a gear accommodating section, a central circular hole at one end, and 2 screw holes to fix the motor. There are external teeth on the motor shaft, and an inner ring gear. The planetary gear is sleeved in the gear accommodating section to accommodate There are 4 flanges outside the section, and the flange screw holes in the flange are used for fixing with the fixing parts.

In a preferred embodiment, the motor has a drive shaft that rotates in the circumferential direction, has an external tooth, and has a planetary gear set installed in the body, and the planetary gear set has a gear box member, An inner ring gear and planetary gears. The planetary gears are sleeved on the gear shaft of the eccentric disc. One end of the gear box is fixed on the motor so that the outer teeth of the motor drive shaft pass through and mesh with the three planetary teeth. The gear box is provided with A number of buckle grooves are set to cooperate with the fixed ribs of the inner gear ring to fix the inner gear ring in the gear box part. The inner teeth mesh with the planetary teeth. The other end of the gear box part is fixed to the fixed part. When the motor rotates, the transmission The outer teeth of the shaft rotate, so the planetary teeth of the gear shaft of the transmission section of the eccentric disc are driven to rotate, so that the eccentric shaft of the bearing section rotates in the circumferential direction.

In a preferred embodiment, the rotation of the eccentric disc member drives the sliding member on the eccentric shaft of the bearing section to rotate.

In a preferred embodiment, due to the rotation of the sliding member, the U-shaped groove of the driven shaft is driven to be placed vertically, and the reciprocating sliding member sleeved on the driven shaft through the round bar is driven. Due to the limitation of the limiting surface of the fixed member, The driven shaft can only reciprocate on the X axis.

In a preferred embodiment, the tapered baffle is sleeved in the circular hole of the driven shaft cutter segment, and the tapered section is matched with the circular hole on the blade to fix the blade.

In a preferred embodiment, a blade fixing ring is sleeved on the driven shaft knife segment, the blade fixing ring flange is placed in the groove of the driven shaft knife segment, the tapered baffle is wrapped inside, and the fixing ring It can only rotate along the outer circumference of the driven shaft to fix the tapered baffle, so the blade is fixed so that the blade reciprocates in the X-axis direction with the driven shaft.

In a preferred embodiment, the fixing frame has a fixing frame slot hole for passing through the blade, and the fixing frame screw hole is fixed on the fixing member.

11: Shell

111: housing space

12: Motor

121: drive shaft

21: Gear box parts

211: Gearbox through hole

212: Gearbox inner circle

213: Gear box buckle groove

214: Gearbox flange

215: Flange screw hole

22: inner gear ring

221: fixed rib

23: Planetary gear

30: eccentric disc

31: Eccentric disc drive section

311: Transmission section gear shaft

32: eccentric disc bearing section

321: Bearing section eccentric shaft

40: Slider

41: Inner hole of sliding part

42: Outer circumference of sliding part

50: driven shaft

51: driven section

511: U-groove of driven shaft

512: Through the round bar

52: knife fragment

521: Knife Fragment Slot

522: Knife Fragment Round Hole

523: Knife Fragment Groove

53: tapered baffle

531: small tapered surface

532: large tapered surface

54: Blade retaining ring

541: Blade retaining ring flange

542: accommodating space

60: Reciprocating slide

61: Inner hole of reciprocating slide

62: Outer circumference of reciprocating slide

70: fixed parts

71: transmission housing section

711: outer circumference of transmission housing section

712: Fixed part sliding part

713: Fixed transmission bearing section

714: drive bearing

72: Follow-up and containment section

721: driven bearing section

722: driven bearing

723: Fixed part limit surface

724: U-shaped limit surface of fixed part

725: Limiting surface of fixed part driven sliding part

726: Fixing screw hole

727: second screw hole

80: fixed frame

81: fixed frame slot

82: Fixing frame screw hole

83: limit surface of fixed frame

X: axial

Figure 1 is an exploded view of the present invention in a preferred embodiment.

Figure 2 is a sectional view of the combined state of the present invention.

Figure 3 is a schematic diagram of the eccentric disk of the present invention.

Figure 4 is a schematic diagram of the sliding member of the present invention.

Figure 5 is a schematic diagram of the driven shaft of the present invention.

Figure 6 is a schematic diagram of the tapered baffle of the present invention.

Figure 7 is a schematic diagram of the reciprocating sliding member of the present invention.

Figure 8 is a schematic diagram of the blade fixing ring of the present invention.

Figure 9 is a schematic diagram of the gear box of the present invention.

Figure 10 is a schematic diagram of the fixing member of the present invention.

Figure 11 is a schematic diagram of the fixing frame of the present invention.

1 to FIG. 11, the present invention is a power reciprocating saw, including: a body with a housing 11, surrounded by an accommodating space 111, the accommodating space 111 is equipped with a motor 12, the motor 12 It has a transmission shaft 121 capable of rotating along the circumferential direction, the transmission shaft 121 is provided with external teeth; a planetary gear set, the planetary gear set has a gear box 21, a ring gear 22, three planetary gears 23, One end of the gear box member 21 has a through hole 211 for the external teeth 121 of the motor drive shaft to pass through, and a screw hole is fixed to the motor 12 and sleeved in the body accommodating space 111, and the gear box member 21 has an inner circumference 212 with A plurality of buckle grooves 213, the ring gear 22 has a plurality of fixing ribs 221, each of the fixed ribs 221 is fixed in each of the buckle grooves 213, and each of the planetary gears 23 meshes in the ring gear 22, the gear box There is a flange screw hole 215 on the flange 214 outside the component; An eccentric disk member 30 having an eccentric disk transmission section 31 and an eccentric disk bearing section 32. On the eccentric disk transmission section, there are 3 equidistant eccentric disk gear shafts 311, on which 3 planetary gears 23 are engaged in the inner ring gear 22, and Engaged with the outer teeth 122 of the motor, there is a bearing section eccentric shaft 321 on the eccentric disc bearing section 32; a sliding member 40 with an inner circular hole 41 of the sliding member and an outer circumference 42 of the sliding member. The inner circular hole 41 of the sliding member is sleeved on the eccentric disc The bearing section of the eccentric shaft 321; a driven shaft member 50, which is placed perpendicular to the eccentric disk member 30, has a driven section 51, a knife section 52, a driven shaft U-shaped groove 511 outside the driven section, and a through hole sleeve One through the round bar 512, the knife segment has a knife segment slot 521 inside, a knife segment round hole 522 is perpendicular to the knife segment slot 521, a knife segment groove 523; a tapered stopper 53 with a small A tapered surface 531, a large tapered surface 532, and a small tapered surface 531 are placed in the circular hole 522 of the driven shaft knife segment; a blade fixing ring 54, with a flange 541, and a accommodating space 542, the flange 541 is sleeved In the driven shaft groove 523, the accommodating space 542, the large tapered surface 532 of the tapered baffle can be accommodated therein; two reciprocating sliding members 60, with an inner circular hole 61 of the reciprocating sliding member, and an outer circumference of the reciprocating sliding member 62 , Respectively sleeved on the two ends of the driven shaft penetrating round rod 512; a fixed member 70, having a transmission housing section 71 and a driven housing section 72, the outer circumference 711 of the transmission housing section is matched with the inner circumference 212 of the gear box member, There are 2 sections of concentric circles in the sliding part 712 in turn. The sliding part 40 slides along the circumference of the sliding part 713. The bearing section 713 is sleeved with a transmission bearing 714. The driven accommodating section 72 is square on the outside and the inner circular hole at one end is a driven bearing. The section 721 is sleeved with a driven bearing 722, with a fixing member limiting surface 723 outside, a polygonal groove at the other end, a fixing member U-shaped limiting surface 724, a fixed member driven sliding member limiting surface 725, and a U-shaped limiting driven shaft The groove 511 and the reciprocating sliding member 60 enable the driven shaft member 50 to only reciprocate along the X-axis direction. The fixing member screw hole 726 is fixed to the gear box flange screw hole 215 with screws; A fixing frame 80 with a fixing frame slot 81, a fixing frame screw hole 82, a fixing frame limiting surface 83, a fixing frame slot 81 for passing through the blade, and the fixing frame screw hole 82 is fixed to the second screw of the fixing member with a screw In the hole 727, the fixing frame limiting surface 83 is matched with the fixing member limiting surface 723.

The above is the structure configuration and connection relationship of the present invention. The use method of the present invention is as follows: For a simpler operation description of the present invention, please refer to Figures 1 to 11. The motor 12 rotates to drive the gear set and the eccentric disk The member 30 rotates so that the eccentric shaft 321 of the bearing section also rotates along the circumference, driving the sliding member 40 to rotate, and the sliding member 40 rotates to drive the U-shaped groove 511 of the vertical driven shaft. Because the U-shaped limiting surface 724 of the fixing member The limiting surface 725 of the movable sliding member restricts the U-shaped groove 511 of the driven shaft and the reciprocating sliding member 60, so that the driven shaft member 50 can only reciprocate along the X axis, and due to the tapered baffle 53 and the blade fixing ring 54 The limit is fixed and drives the blade to reciprocate.

11: Shell

111: housing space

12: Motor

121: drive shaft

21: Gear box parts

211: Gearbox through hole

212: Gearbox inner circle

213: Gear box buckle groove

214: Gearbox flange

215: flange screw hole

22: inner gear ring

221: fixed rib

23: Planetary gear

30: eccentric disc

31: Eccentric disc drive section

311: Transmission section gear shaft

32: eccentric disc bearing section

321: Bearing section eccentric shaft

40: Slider

41: Inner hole of sliding part

42: Outer circumference of sliding part

50: driven shaft

51: driven section

511: U-groove of driven shaft

512: The drive shaft runs through the round bar

52: knife fragment

521: Drive shaft slot

522: Drive shaft round hole

523: drive shaft groove

53: tapered baffle

531: small tapered surface

532: large tapered surface

54: Blade retaining ring

541: Blade retaining ring flange

542: accommodating space

60: Reciprocating slide

61: Inner hole of reciprocating slide

62: Outer circumference of reciprocating slide

70: fixed parts

71: transmission housing section

711: outer circumference of transmission housing section

712: Sliding Parts Department

713: Transmission bearing section

714: drive bearing

72: Follow-up and containment section

721: driven bearing section

722: driven bearing

723: Fixed part limit surface

724: U-shaped limit surface of fixed part

725: Limiting surface of fixed part driven sliding part

726: Fixing screw hole

80: fixed frame

81: fixed frame slot

82: Fixing frame screw hole

83: limit surface of fixed frame

X: axial

Claims (3)

A power reciprocating saw, comprising: a body with a motor; an eccentric disk with an eccentric disk drive section and an eccentric disk bearing section. The end face of the eccentric disk drive section has 3 equidistantly placed gear shafts, and the other end has a bearing section. Eccentric shaft; a sliding part with an inner circular hole in the outer circumference of the sliding part, sleeved on the eccentric shaft of the bearing section of the eccentric disc; a driven shaft placed perpendicular to the eccentric disc, with a driven section and a knife Fragment, there is a U-shaped groove of the driven shaft outside the driven section, and a penetrating round rod is sleeved with a through circular hole. The knife segment has a knife segment slot in the knife segment, and the outer knife segment circular hole is perpendicular to the knife segment slot ; Two reciprocating sliding parts, with a reciprocating sliding part in the outer circumference of the reciprocating sliding part inner circular hole sleeved at the two ends of the driven shaft penetrating round rod; a fixed part, with a transmission housing section and a driven housing section, transmission housing The outer circumference of the section is matched with the inner circumference of the gearbox. There are two concentric circles inside, which are the sliding part of the fixed part in turn. The sliding part slides in it. The bearing section is sleeved with a transmission bearing. The outside of the driven housing section is square, and one end has The inner circular hole is the driven bearing section, which is sleeved with a driven bearing, with a fixed part limiting surface outside, and a polygonal groove inside the other end, with a U-shaped limiting surface of the fixed part. The fixed part driven sliding part limiting surface restricts the follower The U-shaped groove of the moving shaft and the reciprocating sliding part enable the driven shaft to only reciprocate along the X-axis. There are 4 fixing screw holes on it, which are fixed to the flange screw holes of the gear box with screws. The power reciprocating saw according to claim 1, wherein the eccentric disk member has an eccentric shaft of the bearing section in the same rotation direction as the planetary gear, and is placed perpendicular to the driven shaft member. The power reciprocating saw as described in claim 1, wherein the driven shaft is sleeved with a through round bar, and the reciprocating sliding member is sleeved at both ends of the round bar. Due to the limitation of the polygonal groove of the fixing member, the driven shaft can move back and forth more Stable and improved efficiency.

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