CN212384742U

CN212384742U - Power reciprocating saw

Info

Publication number: CN212384742U
Application number: CN202020623050.6U
Authority: CN
Inventors: 卢灿阳; 卢允中
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-23
Filing date: 2020-04-23
Publication date: 2021-01-22
Anticipated expiration: 2030-04-23

Abstract

The utility model discloses a power reciprocating saw, include: a body having an accommodating space and a through opening; the driving motor is arranged in the accommodating space and comprises a transmission shaft; a rotating unit, which is arranged in the accommodating space and is driven by the transmission shaft to rotate, wherein the rotating unit defines a rotating shaft and comprises an eccentric convex part eccentric to the rotating shaft; and the reciprocating mechanism comprises a driven shaft part which is arranged in the accommodating space and corresponds to the through hole, the driven shaft part comprises a supported part which is positioned on the rotating path of the eccentric convex part and an assembling part which is assembled with a blade, and the eccentric convex part can be abutted with the supported part and drive the driven shaft part to reciprocate relative to the body along a moving direction which is transverse to the rotating shaft.

Description

Power reciprocating saw

Technical Field

The present invention relates to saws, and more particularly to a power reciprocating saw.

Background

The existing electric reciprocating saw uses a bevel gear structure to reduce the rotating speed of a motor transmission shaft and change the rotating direction, and then uses an eccentric shaft arranged on the bevel gear to drive a driven device to reciprocate.

The bevel gear structure has the disadvantages of high processing precision requirement, high processing cost and long processing time, and the existing electric reciprocating saw has the disadvantages of complicated structure, large volume and energy consumption for converting the rotating direction, thus having the defect of urgent need for improvement.

Therefore, there is a need for a novel and improved power reciprocating saw to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The main object of the utility model is to provide a power reciprocating saw, simple structure, small and energy-conserving.

To achieve the above object, the present invention provides a power reciprocating saw, including: a body having an accommodating space and a through opening; the driving motor is arranged in the accommodating space and comprises a transmission shaft; a rotating unit, which is arranged in the accommodating space and is driven by the transmission shaft to rotate, wherein the rotating unit defines a rotating shaft and comprises an eccentric convex part eccentric to the rotating shaft; and the reciprocating mechanism comprises a driven shaft part which is arranged in the accommodating space and corresponds to the through hole, the driven shaft part comprises a supported part which is positioned on the rotating path of the eccentric convex part and an assembling part for assembling a blade, and the eccentric convex part can be abutted with the supported part and drive the driven shaft part to reciprocate relative to the body along a moving direction which is transverse to the rotating shaft.

The rotating unit further comprises a rotating part provided with the eccentric convex part and a sliding part which can be arranged on the eccentric convex part in a relatively rotating way, and the sliding part can be abutted against the abutted part.

The body comprises a fixing piece arranged in the accommodating space, the fixing piece comprises a first channel for accommodating the rotating unit and a second channel for accommodating the reciprocating mechanism, and the first channel and the second channel are transversely connected and communicated with each other.

One of the inner peripheral surface of the second channel and the outer peripheral surface of the driven shaft member is provided with at least one guide protrusion, and the other one is provided with at least one guide recess capable of receiving the at least one guide protrusion.

Each guide protrusion comprises a shaft lever and a pulley capable of rotating relative to the shaft lever, and at least part of each pulley is accommodated in one guide groove.

The assembly part comprises a groove which is axially and concavely arranged on one end face of the driven shaft part, a concave hole which is transversely communicated with the groove and a limiting part which can be contained in the concave hole in a limiting way, the groove is used for inserting the blade, and the limiting part can partially extend into the groove.

The concave hole radially penetrates through a circumferential wall of the driven shaft member, the reciprocating mechanism further comprises a stopper covered on the concave hole, and the stopper radially stops the limiting member.

The power reciprocating saw further comprises a transmission assembly connected between the rotating unit and the transmission shaft, wherein the transmission assembly comprises a gear ring and at least one planetary gear set, each planetary gear set comprises a sun gear and at least one planetary gear meshed between the sun gear and the gear ring, the sun gear of one planetary gear set is driven to rotate by the transmission shaft, and the at least one planetary gear of the planetary gear set adjacent to the rotating unit can drive the rotating unit to rotate.

The pressed part comprises two pressing walls which are radially and convexly arranged on the peripheral surface of the driven shaft part, the two pressing walls extend transversely to the moving direction, and the eccentric convex part can relatively slide between the two pressing walls and can be pressed against the two pressing walls.

The rotating unit further comprises a rotating member provided with the eccentric convex part and a sliding member relatively rotatably arranged on the eccentric convex part, and the sliding member can be abutted against the abutted part; the rotating unit also comprises a bearing which is sleeved on the rotating part and can be abutted with the inner circumferential surface of the first channel; the assembly part comprises a cutting groove which is axially and concavely arranged on one end surface of the driven shaft part, a concave hole which is transversely communicated with the cutting groove and a limiting part which can be contained in the concave hole in a limiting way, the cutting groove is used for inserting the blade, and the limiting part can partially extend into the cutting groove; the concave hole radially penetrates through the peripheral wall of the driven shaft element, the reciprocating mechanism further comprises a stopper covered on the concave hole, and the stopper radially stops the limiting element; the stopper is an annular member which can be relatively rotatably sleeved on the assembly part, and a concave part which can correspond to the limiting part is radially and concavely arranged on the inner circumferential surface of the stopper; one of the inner peripheral surface of the blocking piece and the outer peripheral surface of the driven shaft piece is provided with at least one clamping protrusion, and the other one is provided with at least one clamping recess which can be clamped with the at least one clamping protrusion; the limiting piece comprises a tapered end which can extend into the groove and an expanded end which is opposite to the tapered end, and the expanded end can be clamped against the peripheral wall of the concave hole and is abutted against the blocking piece; the power reciprocating saw also comprises a support frame, the support frame comprises a through groove which is positioned outside the body and corresponds to the through hole and two arm parts which are connected with the fixing part, the through groove is used for the blade to penetrate through, and the driven shaft part can reciprocate between the two arm parts; one of the fixing piece and the two arm parts is provided with an alignment concave part, and the other one is provided with an alignment convex part which can be combined with the alignment concave part; the power reciprocating saw also comprises a transmission component connected between the rotating unit and the transmission shaft, wherein the transmission component comprises a gear ring and at least one planetary gear set, each planetary gear set comprises a sun gear and at least one planetary gear meshed between the sun gear and the gear ring, the sun gear of one planetary gear set is driven by the transmission shaft to rotate, and the at least one planetary gear of the planetary gear set adjacent to the rotating unit can drive the rotating unit to rotate; the body also comprises a transmission containing part which contains the transmission component and is connected with the switching part, one of the inner peripheral surface of the transmission containing part and the outer peripheral surface of the gear ring comprises a group of convex parts, and the other comprises a group of concave parts which can be connected with the group of convex parts; the pressed part comprises two pressing walls which are radially and convexly arranged on the peripheral surface of the driven shaft part, the two pressing walls extend transversely to the moving direction, and the eccentric convex part can relatively slide between the two pressing walls and can be pressed against the two pressing walls; and the second channel comprises a guide part corresponding to the outer contour of the supported part.

The utility model has the advantages that: the utility model discloses simple structure, small and energy-conserving.

Drawings

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

Fig. 2 is a perspective view of the fixing member of fig. 1 from another perspective.

Fig. 3 is a cross-sectional view of a preferred embodiment of the present invention.

Fig. 4 is an exploded view of a driven shaft according to a preferred embodiment of the present invention.

FIG. 5 is a perspective view of the stop of FIG. 4 from another perspective.

The power reciprocating saw comprises a power reciprocating saw body 1, a blade 2, a blade 10, a body 11, an accommodating space 12, a through hole 13, a fixing piece 131, a first channel 132, a second channel 133, a guide concave 134, a guide part 135, an alignment concave part 14, a transmission accommodating part 141, an assembly concave part 20, a driving motor 21, a transmission shaft 30, a rotating unit 31, an eccentric convex part 31, a rotating part 32, a sliding part 33, a bearing 34, a reciprocating mechanism 40, a driven shaft part 41, a driven shaft part 411, a supported part 412, an assembly part 413, a guide convex 413a shaft rod 413b, a pulley 414, an abutting wall 415, a cutting groove 416, a concave hole 417, a limiting piece 417, a conical end 417b, an expanding end 418, a clamping concave 42, a stopping piece 421, a concave part 422, a clamping convex part 422, a supporting frame 50, a penetrating groove 51, a convex part 52, an arm part 521, a convex part 60, a transmission component 61, a gear ring, 611, an assembly convex part, 62, a planetary gear set, 621, a sun gear, 622, a planetary gear, M, a moving direction and R, a rotating shaft.

Detailed Description

The following description is given by way of example only, and not by way of limitation, of the scope of the invention.

Referring to fig. 1 to 5, which illustrate a preferred embodiment of the present invention, a power reciprocating saw 1 of the present invention includes a main body 10, a driving motor 20, a rotating unit 30 and a reciprocating mechanism 40.

The main body 10 has a receiving space 11 and a through opening 12; the driving motor 20 is disposed in the accommodating space 11 and includes a transmission shaft 21; the rotating unit 30 is disposed in the accommodating space 11 and driven by the transmission shaft 21 to rotate, the rotating unit 30 defines a rotating axis R and includes an eccentric protrusion 31 eccentric to the rotating axis R; the reciprocating mechanism 40 includes a driven shaft 41 disposed in the accommodating space 11 and corresponding to the through hole 12, the driven shaft 41 includes a supported portion 411 located on a rotation path of the eccentric protrusion 31 and an assembling portion 412 for assembling a blade 2, and the eccentric protrusion 31 can be abutted against the supported portion 411 and drive the driven shaft 41 to reciprocate relative to the body 10 along a moving direction M transverse to the rotation axis R. Therefore, the power reciprocating saw 1 is simple in structure, small in size and energy-saving.

The main body 10 includes a fixing member 13 disposed in the accommodating space 11, the fixing member 13 includes a first channel 131 for accommodating the rotating unit 30 and a second channel 132 for accommodating the reciprocating mechanism 30, and the first channel 131 and the second channel 132 are transversely connected and communicated with each other. One of the inner peripheral surface of the second channel 132 and the outer peripheral surface of the driven shaft 41 is provided with at least one guiding protrusion 413, and the other one is provided with at least one guiding recess 133 capable of receiving the at least one guiding protrusion 413. In this embodiment, the outer peripheral surface of the driven shaft 41 is provided with two guiding protrusions 413, and the inner peripheral surface of the second channel 132 is provided with two guiding recesses 133 corresponding to the two guiding protrusions 413, so that the driven shaft 41 does not rotate relative to the second channel 132 and can move relatively stably without skewing; each guide protrusion 413 comprises a shaft 413a and a pulley 413b capable of rotating relative to the shaft 413a, and each pulley 413b is at least partially accommodated in one guide recess 133, can slide smoothly and is not easy to jam.

The rotating unit 30 further includes a rotating member 32 having the eccentric protrusion 31 and a sliding member 33 relatively rotatably disposed on the eccentric protrusion 31, wherein the sliding member 33 can abut against the abutted portion 411 to operate smoothly without jamming. In the embodiment, the eccentric protrusion 31 is cylindrical, and the sliding member 33 is a roller sleeved on the eccentric protrusion 31 and can smoothly rotate relative to the eccentric protrusion 31; the supported portion 411 includes two supporting walls 414 protruding radially from the outer peripheral surface of the driven shaft 41, the two supporting walls 414 extend transversely to the moving direction M, the eccentric protrusion 31 and the sliding member 33 can slide between the two supporting walls 414 relatively and can be supported by the two supporting walls 414, so as to drive the driven shaft 41 to move axially along the moving direction M in a reciprocating manner, and the structure is simple, stable and not easy to slip. In other embodiments, the sliding member may be rotatably pivoted (not sleeved) to the eccentric protrusion. Preferably, the rotating unit 30 further includes a bearing 34 disposed on the rotating member 32 and capable of abutting against the inner peripheral surface of the first channel 131, so as to ensure that the rotating member 32 rotates smoothly in the first channel 131; the second channel 132 includes a guiding portion 134 corresponding to the outer contour of the receiving portion 411, which can guide the driven shaft 41 to stably move and not easily tilt relatively.

The assembly part 412 includes a groove 415 axially recessed in an end surface of the driven shaft 41, a recess 416 transversely communicating with the groove 415, and a limit piece 417 disposed in the recess 416 in a limiting manner, wherein the groove 415 is for inserting the blade 2, and the limit piece 417 partially extends into the groove 415 to fix the blade 2. Preferably, the concave hole 416 radially penetrates through a circumferential wall of the driven shaft 41, the reciprocating mechanism 40 further includes a stopper 42 covering the concave hole 416, and the stopper 42 radially stops the limiting member 417, so that the limiting member 417 can be prevented from coming off and the assembly is facilitated. In detail, the limiting member 417 includes a tapered end 417a capable of extending into the slot 415 and an enlarged end 417b opposite to the tapered end 417a, the tapered end 417a is capable of passing through a through hole on the blade 2, and the enlarged end 417b is capable of being clamped against the peripheral wall of the concave hole 416 and abutting against the blocking member 42, so that the assembly is convenient and the stability is good. Referring to fig. 4 and 5, in the present embodiment, the blocking member 42 is an annular member that is rotatably sleeved on the assembling portion 412, a concave portion 421 that can correspond to the limiting member 417 is radially recessed on an inner circumferential surface of the blocking member 42, so that the blocking member 42 can be rotated to make the concave portion 421 radially opposite to the limiting member 417, and the expanded end 417b can be partially accommodated in the concave portion 421 to make the tapered end 417a not interfere with the blade 2 in the moving direction M, thereby facilitating the assembly and disassembly of the blade 2. One of the inner peripheral surface of the stopper 42 and the outer peripheral surface of the driven shaft 41 is provided with at least one locking protrusion 422, and the other one is provided with at least one locking recess 418 capable of being locked with the at least one locking protrusion 422, so that the structure is simple, and the assembly and the rotation adjustment are convenient. However, the limiting member may also be, for example, an elastic member radially urging against the cut-out groove, or a screw or a pin transversely inserted into the assembly portion and partially extending into the cut-out groove; the blocking member can also be a blocking piece which can be selectively blocked in the through hole.

The power reciprocating saw 1 further includes a supporting frame 50, the supporting frame 50 includes a through slot 51 located outside the main body 10 and corresponding to the through hole 12 and two arms 52 connected to the main body 10, the through slot 51 is used for the blade 2 to pass through and the driven shaft 41 can reciprocate between the two arms 52, so as to laterally support the blade 2 and prevent the driven shaft 41 from being collided by external force. In the present embodiment, the two arm portions 52 extend in parallel and are connected to two opposite sides of the fixing member 13, one of the fixing member 13 and the two arm portions 52 is provided with a positioning concave portion 135, and the other is provided with a positioning convex portion 521 which can be assembled with the positioning concave portion 135, so that the supporting strength and the assembling stability are good.

The power reciprocating saw 1 further includes a transmission assembly 60 connected between the rotating unit 30 and the transmission shaft 21, the transmission assembly 60 includes a ring gear 61 and at least one planetary gear set 62, each planetary gear set 62 includes a sun gear 621 and at least one planetary gear 622 engaged between the sun gear 621 and the ring gear 61, wherein the sun gear 621 of one planetary gear set 62 is driven by the transmission shaft 21 to rotate, and the at least one planetary gear 622 of the planetary gear set 62 adjacent to the rotating unit 30 can drive the rotating unit 30 to rotate, thereby effectively reducing the rotation speed of the transmission shaft 21 and driving the rotating member 32 to rotate. The main body 10 further includes a transmission accommodating portion 14 for accommodating the transmission assembly 60 and connected to the adapting portion, one of the inner peripheral surface of the transmission accommodating portion 14 and the outer peripheral surface of the gear ring 61 includes a set of adapting convex portions 611, and the other includes a set of assembling concave portions 141 capable of connecting with the set of adapting convex portions 611, so as to facilitate assembling. In the embodiment, the assembling protrusion 611 includes a plurality of convex ribs protruding from the outer circumferential surface of the gear ring 61, and the assembling recess 141 includes a plurality of concave grooves recessed from the inner circumferential surface of the transmission accommodating portion 14, so that the structure is simple, the process is easy, and the assembling stability is good.

Claims

1. A powered reciprocating saw, comprising: the method comprises the following steps:

a body having an accommodating space and a through opening;

the driving motor is arranged in the accommodating space and comprises a transmission shaft;

a rotating unit, which is arranged in the accommodating space and is driven by the transmission shaft to rotate, wherein the rotating unit defines a rotating shaft and comprises an eccentric convex part eccentric to the rotating shaft; and

and the reciprocating mechanism comprises a driven shaft part which is arranged in the accommodating space and corresponds to the through hole, the driven shaft part comprises a supported part positioned on the rotating path of the eccentric convex part and a group of assembling parts connected with a blade, and the eccentric convex part can be abutted with the supported part and drive the driven shaft part to reciprocate relative to the body along a moving direction which is transverse to the rotating shaft.

2. The power reciprocating saw of claim 1, wherein: the rotating unit further comprises a rotating part provided with the eccentric convex part and a sliding part which can be arranged on the eccentric convex part in a relatively rotating way, and the sliding part can be abutted against the abutted part.

3. The power reciprocating saw of claim 1, wherein: the body comprises a fixing piece arranged in the accommodating space, the fixing piece comprises a first channel for accommodating the rotating unit and a second channel for accommodating the reciprocating mechanism, and the first channel and the second channel are transversely connected and communicated with each other.

4. The power reciprocating saw of claim 3, wherein: one of the inner peripheral surface of the second channel and the outer peripheral surface of the driven shaft member is provided with at least one guide protrusion, and the other one is provided with at least one guide recess capable of receiving the at least one guide protrusion.

5. The power reciprocating saw of claim 4, wherein: each guide protrusion comprises a shaft lever and a pulley capable of rotating relative to the shaft lever, and at least part of each pulley is accommodated in one guide groove.

6. The power reciprocating saw of claim 1, wherein: the assembly part comprises a groove which is axially and concavely arranged on one end face of the driven shaft part, a concave hole which is transversely communicated with the groove and a limiting part which can be contained in the concave hole in a limiting way, the groove is used for inserting the blade, and the limiting part can partially extend into the groove.

7. The power reciprocating saw of claim 6, wherein: the concave hole radially penetrates through a circumferential wall of the driven shaft member, the reciprocating mechanism further comprises a stopper covered on the concave hole, and the stopper radially stops the limiting member.

8. The power reciprocating saw of claim 1, wherein: the transmission assembly is connected between the rotating unit and the transmission shaft, wherein the transmission assembly comprises a gear ring and at least one planetary gear set, each planetary gear set comprises a sun gear and at least one planetary gear meshed between the sun gear and the gear ring, the sun gear of one planetary gear set is driven to rotate by the transmission shaft, and the at least one planetary gear of the planetary gear set adjacent to the rotating unit can drive the rotating unit to rotate.

9. The powered reciprocating saw as defined in any one of claims 1 to 8, wherein: the pressed part comprises two pressing walls which are radially and convexly arranged on the peripheral surface of the driven shaft part, the two pressing walls extend transversely to the moving direction, and the eccentric convex part can relatively slide between the two pressing walls and can be pressed against the two pressing walls.

10. The power reciprocating saw of claim 5, wherein: the rotating unit further comprises a rotating member provided with the eccentric convex part and a sliding member relatively rotatably arranged on the eccentric convex part, and the sliding member can be abutted against the abutted part; the rotating unit also comprises a bearing which is sleeved on the rotating part and can be abutted with the inner circumferential surface of the first channel; the assembly part comprises a cutting groove which is axially and concavely arranged on one end surface of the driven shaft part, a concave hole which is transversely communicated with the cutting groove and a limiting part which can be contained in the concave hole in a limiting way, the cutting groove is used for inserting the blade, and the limiting part can partially extend into the cutting groove; the concave hole radially penetrates through the peripheral wall of the driven shaft element, the reciprocating mechanism further comprises a stopper covered on the concave hole, and the stopper radially stops the limiting element; the stopper is an annular member which can be relatively rotatably sleeved on the assembly part, and a concave part which can correspond to the limiting part is radially and concavely arranged on the inner circumferential surface of the stopper; one of the inner peripheral surface of the blocking piece and the outer peripheral surface of the driven shaft piece is provided with at least one clamping protrusion, and the other one is provided with at least one clamping recess which can be clamped with the at least one clamping protrusion; the limiting piece comprises a tapered end which can extend into the groove and an expanded end which is opposite to the tapered end, and the expanded end can be clamped against the peripheral wall of the concave hole and is abutted against the blocking piece; the power reciprocating saw also comprises a support frame, the support frame comprises a through groove which is positioned outside the body and corresponds to the through hole and two arm parts which are connected with the fixing part, the through groove is used for the blade to penetrate through, and the driven shaft part can reciprocate between the two arm parts; one of the fixing piece and the two arm parts is provided with an alignment concave part, and the other one is provided with an alignment convex part which can be combined with the alignment concave part; the power reciprocating saw also comprises a transmission component connected between the rotating unit and the transmission shaft, wherein the transmission component comprises a gear ring and at least one planetary gear set, each planetary gear set comprises a sun gear and at least one planetary gear meshed between the sun gear and the gear ring, the sun gear of one planetary gear set is driven by the transmission shaft to rotate, and the at least one planetary gear of the planetary gear set adjacent to the rotating unit can drive the rotating unit to rotate; the body also comprises a transmission containing part which contains the transmission component and is connected with the switching part, one of the inner peripheral surface of the transmission containing part and the outer peripheral surface of the gear ring comprises a group of convex parts, and the other comprises a group of concave parts which can be connected with the group of convex parts; the pressed part comprises two pressing walls which are radially and convexly arranged on the peripheral surface of the driven shaft part, the two pressing walls extend transversely to the moving direction, and the eccentric convex part can relatively slide between the two pressing walls and can be pressed against the two pressing walls; and the second channel comprises a guide part corresponding to the outer contour of the supported part.