CN211387163U

CN211387163U - Reciprocating saw

Info

Publication number: CN211387163U
Application number: CN201922120981.4U
Authority: CN
Inventors: 吹拔正敏; 周洋; 高�浩
Original assignee: Nanjing Deshuo Industrial Co Ltd
Current assignee: Nanjing Chervon Industry Co Ltd
Priority date: 2019-12-01
Filing date: 2019-12-01
Publication date: 2020-09-01
Anticipated expiration: 2029-12-01

Abstract

The utility model discloses a reciprocating saw, include: a housing including a grip portion for a user to grip and a main body portion; the driving shaft is arranged in the main body part, extends along the first axis, and supports and drives the working accessory to output; the motor drives the output shaft to reciprocate, and comprises a motor shaft rotating around a second axis; the transmission assembly is connected with the motor and the output shaft; the battery pack supplies power to the motor; the driving circuit is electrically connected with the battery pack and the motor; the holding part forms a first holding part and a second holding part for holding, a holding hole for holding is formed between the first holding part and the second holding part, the holding part forms a holding cavity for holding the motor at the lower part of the second holding part, the battery pack and the working accessory are arranged below the holding part, and the battery pack and the working accessory are arranged at two ends of the shell along the first axis.

Description

Reciprocating saw

Technical Field

The utility model relates to an electric tool, concretely relates to reciprocating saw.

Background

The reciprocating saw is used as a common cutting tool, the height of the whole reciprocating saw is too large due to the arrangement of the whole reciprocating saw in the prior art, the weight of the whole reciprocating saw is larger, and a user is easy to feel tired after holding the whole reciprocating saw for a long time, so that the use feeling is poor. Conventional reciprocating saws have internal components that are unbalanced in weight such that the user cannot use the reciprocating saw stably. In the conventional D-shaped handle reciprocating saw, the battery pack is usually arranged below the saw blade, so that when a workpiece at a lower position is cut, the maximum distance for the saw blade to work downwards is easily limited due to the lower battery pack, a user cannot easily cut the workpiece at the lower position by using the battery pack, and interference is brought to the use of the reciprocating saw by the user.

SUMMERY OF THE UTILITY MODEL

For solving the deficiencies of the prior art, an object of the utility model is to provide a reciprocating saw with a more compact structure.

In order to achieve the above object, the utility model adopts the following technical scheme:

a reciprocating saw, comprising: a housing including a grip portion for a user to grip and a main body portion; the output shaft is arranged in the main body part, extends along the first axis, and supports and drives the working accessory to output; the motor drives the output shaft to reciprocate, and comprises a motor shaft rotating around a second axis; the transmission assembly is connected with the motor and the output shaft; the battery pack supplies power to the motor; the driving circuit is electrically connected with the battery pack and the motor; the holding part forms a first holding part and a second holding part for holding, a holding hole for holding is formed between the first holding part and the second holding part, a holding cavity for holding the motor is formed below the second holding part by the holding part, the battery pack and the working accessory are arranged below the holding part, and the battery pack and the working accessory are arranged at two ends of the shell along the first axis.

Optionally, the first axis and the second axis intersect, and the intersection angle is greater than or equal to 70 degrees and less than or equal to 110 degrees.

Optionally, the first holding portion is disposed obliquely with respect to the main body portion, and the first holding portion is set to extend on a third axis, and the third axis intersects with the second axis and forms an included angle greater than or equal to 30 degrees and less than or equal to 60 degrees.

Optionally, the transmission assembly includes a transmission shaft, the motor shaft includes a first end and a second end along a first axial direction, and defines a first plane perpendicular to the first axial direction and passing through a first end surface of the first end; a second plane which is perpendicular to the first axis and passes through a second end face of the second end is defined, the first plane is parallel to the second plane, the motor shaft is positioned between the first plane and the second plane, the motor comprises stator magnetic steel and rotor magnetic steel, and the stator magnetic steel and the rotor magnetic steel are arranged between the first plane and the second plane; the drive shaft is at least partially positioned between the first plane and the second plane.

Optionally, the projections of the transmission shaft and the rotor magnetic steel in the first axial direction at least partially overlap.

Optionally, the transmission assembly further includes a first transmission gear and a second transmission gear, the first transmission gear is engaged with the motor shaft, the first transmission gear and the second transmission gear are arranged in parallel with respect to the first axis, and the transmission shaft is arranged in parallel with the second axis.

Optionally, the transmission assembly further includes an eccentric block and a balance block, the balance block is disposed between the first transmission gear and the second transmission gear, and the eccentric block is connected to the second transmission gear.

Optionally, the battery pack further comprises a connection terminal connected to the driving circuit, and a battery pack axis passing through the connection terminal is set in the insertion direction of the battery pack connected to the driving circuit, and the battery pack axis is arranged parallel to the output shaft.

Optionally, the battery pack further includes a connection terminal connected to the driving circuit, and a battery pack axis passing through the connection terminal is set in an insertion direction of the battery pack to which the driving circuit is connected, the battery pack axis is arranged to intersect with the output shaft, and an intersection angle is greater than zero and smaller than 15 degrees.

Optionally, a projection of the center of gravity of the reciprocating saw along the second axial direction is disposed within a projection of the grip portion along the second axial direction.

Advantageous effects

The utility model provides a reciprocating saw, including the portion of gripping, and the portion of gripping lower part formation is used for holding the chamber that holds of motor, and battery package and work annex setting are in the portion of gripping below, and battery package and work annex set up in the casing both ends, and this reciprocating saw structure is compacter, has reduced reciprocating saw's size, and convenience of customers grips, and can cut the lower work piece of relative position.

Drawings

FIG. 1 is a front view of a first embodiment of a reciprocating saw;

FIG. 2 is a schematic view showing the arrangement of the components of the reciprocating saw of the first embodiment;

FIG. 3 is an internal structural view of the reciprocating saw of the first embodiment;

fig. 4 is a view showing the internal structure of the main body of the reciprocating saw according to the first embodiment.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1 and 2, in a first embodiment of the present invention, the reciprocating saw includes a housing 100, an output shaft 200, a motor 300, a transmission assembly 400, a battery pack 500, and a driving circuit 510. The housing 100 includes a holding portion 110 for a user to hold and a main body portion 120, the holding portion 110 is connected to the main body portion 120, and the holding portion 110 is disposed above the main body portion 120. Further, the holding portion 110 forms a first holding portion 111 and a second holding portion 112 for holding, and a holding hole for holding is formed between the first holding portion 111 and the second holding portion 112, and when a user holds the reciprocating saw by the holding portion 110, the hand passes through the holding hole to hold the first holding portion 111 or the second holding portion 112. The first and

second holding portions

111 and 112 are connected at one end, and the other ends of the first and

second holding portions

111 and 112 are respectively connected to the main body portion 120, and the first and

second holding portions

111 and 112 intersect and form a certain angle. The grip 110 forms a receiving cavity 113 for receiving the motor 300 at a lower portion of the second grip 112, and the body 120 forms a mounting cavity communicating with the receiving cavity 113 for mounting the transmission assembly 400 and the output shaft 200. The battery pack 500 and the working accessories are disposed under the grip 110, and the battery pack 500 and the working accessories are disposed at both ends of the case 100 along the first axis 610 direction. The motor 300 is oppositely arranged on the upper side of the transmission assembly 400 and is arranged in the holding part 110 of the shell 100, so that the reciprocating saw machine is more compact, the weight and the size of the reciprocating saw are reduced, and the reciprocating saw is convenient for a user to hold and use.

The motor 300 is used for providing power for the reciprocating saw and driving the output shaft 200 to reciprocate, and the motor 300 comprises a motor shaft 310 rotating around a second axis 620; the driving circuit 510 connects the battery pack 500 and the motor 300 so that the battery pack 500 supplies power to the motor 300. The battery pack 500 further includes connection terminals connected to the driving circuit 510, and a battery pack axis 640 passing through the connection terminals is set in an insertion direction of the battery pack 500 to the driving circuit 510, and the battery pack axis 640 may be understood as an axis passing through the connection terminals of the battery pack 500 and parallel to the bottom surface of the battery pack 500 to define a mounting direction of the battery pack 500. In the present embodiment, the battery pack axis 640 is set parallel, or approximately parallel, to the output shaft 200. In particular, when the output shaft 200 and the battery pack axis 640 are approximately parallel, the battery pack axis 640 intersects the first axis 610 but over a range of greater than zero degrees and less than 15 degrees. The battery pack 500 is arranged below the holding part 110 relatively, and the main body part 120 is inserted into the direction parallel to the axis 640 of the battery pack through the connecting terminal, so that the height of the reciprocating saw can be effectively reduced, namely the overall length of the reciprocating saw in the direction of the second axis 620 is reduced, the battery pack 500 and the main body part 120 are arranged to be flush, the reciprocating saw can be placed on a desktop conveniently, and the stability of using the reciprocating saw is improved.

Referring to fig. 2 and 4, the transmission assembly 400 connects the motor 300 and the output shaft 200, thereby transmitting the power of the motor 300 to the output shaft 200. The output shaft 200 is coupled to a tool holder for holding a working accessory, such as a saw blade, which may be coupled to different working accessories for cutting different objects. Specifically, the output shaft 200 extends along the first axis 610 and is disposed in a mounting cavity of the main body 120, and the tool chuck is connected to the output shaft 200 and at least partially extends out of the mounting cavity, so as to clamp a working accessory such as a saw blade outside the housing 100 to drive the working accessory to output.

The transmission assembly 400 includes a transmission shaft 410, a first transmission gear 420 and a second transmission gear 430, and an eccentric mass 440 for reciprocating the output shaft 200 and a balance mass 450 for vibration damping. The first transmission gear 420 is engaged with the motor shaft 310, and the transmission shaft 410 is connected to and penetrates the first transmission gear 420 and supports the first transmission gear 420, and the other end of the transmission shaft 410 is connected to the housing 100 or a gear box in the housing 100. The second transmission gear 430 is connected with the first transmission gear 420, an eccentric block 440 is arranged on the second transmission gear 430, the eccentric block 440 is far away from the circle center of the second transmission gear 430, a connecting piece is arranged on the eccentric block 440, and the first transmission gear 420 and the eccentric block 440 on the second transmission gear 430 are connected through the connecting piece, so that the effect is achieved. The side of the second transmission gear 430, on which the eccentric block 440 is not mounted, is provided with a transmission pin, the corresponding output shaft 200 is provided with a mounting hole, the mounting hole is matched with the transmission pin in size, and the transmission pin can roll in the mounting hole in a reciprocating manner, so that the first transmission gear 420, the second transmission gear 430 and the transmission shaft 410 are driven to reciprocate the output shaft 200.

The first transmission gear 420 and the second transmission gear 430 can generate large vibration due to eccentric motion under high-speed rotation. In the present embodiment, a weight 450 is further provided between the first transmission gear 420 and the second transmission gear 430. The counterweight 450 extends substantially along a first axis 610 that is parallel to the direction of the output shaft 200. The balance weight 450 is formed with a through hole and is coupled between the first transmission gear 420 and the second transmission gear 430 through the eccentric mass 440. When the first transmission gear 420 drives the second transmission gear 430 to rotate at a high speed, the balance weight 450 can balance the vibration between the two, so that the whole reciprocating saw can work in a stable state.

The motor 300 further comprises a rotor sleeve, stator magnetic steel and a stator coil, wherein the rotor sleeve is mounted on the motor shaft 310 and rotates synchronously with the motor shaft 310, two ends of the motor shaft 310 penetrate through the rotor sleeve, and the rotor sleeve is provided with the rotor magnetic steel; the stator magnetic steel is disposed at least partially within the rotor sleeve and is used to wind the stator coils, wherein the motor shaft 310 extends and is connected to the transmission assembly 400. The rotor sleeve is 60mm on the first axis 610, preferably, the length of the rotor sleeve on the first axis 610 is greater than or equal to 35mm and less than or equal to 60mm, the motor 300 with the size can effectively shorten the length of the motor 300 on the first axis 610, so that the whole volume of the reciprocating saw is reduced, and the size of the holding part 110 is moderate and is suitable for the human mechanics held by a user. The size of the motor 300 arranged in the second holding part 112 is set between 35mm and 60mm, so that the size of the whole machine can be effectively reduced, the output power of the motor 300 can meet the operation requirement of the reciprocating saw, and the output performance of the reciprocating saw is ensured.

In the present embodiment, the motor shaft 310 and the output shaft 200 intersect, i.e., the first axis 610 and the second axis 620 intersect, and the main body portion 120 and the output shaft 200 extend in the same direction, i.e., the main body portion 120 also extends along the first axis 610. Further, the motor shaft 310 and the output shaft 200 are disposed to intersect and be perpendicular or approximately perpendicular, such that the motor 300 is disposed perpendicularly with respect to the output shaft 200 and is disposed above the output shaft 200, such that the motor 300 is disposed above the main body portion 120 and is relatively perpendicular or approximately perpendicular to the main body portion 120. Because the motor 300 is disposed in the holding portion 110 of the housing 100, specifically, in the second holding portion 112, the end of the second holding portion 112 connected to the main body portion 120 at least partially extends along the direction of the second axis 620 to accommodate the motor 300. The first axis 610 and the second axis 620 intersect at an angle of 70 degrees or more and 110 degrees or less, and further, the first axis 610 and the second axis 620 intersect at an angle of 85 degrees or more and 95 degrees or less, so that the motor 300 is disposed above the upper portion of the reciprocating saw, i.e., the body portion 120. Therefore, the size of the transmission assembly 400 can be effectively reduced, the motor 300 is partially overlapped with the holding part 110, the space of the reciprocating saw can be effectively utilized, and the size and the weight are further reduced.

Further, the first holding portion 111 is disposed obliquely relative to the main body portion 120, and the second holding portion 112 is set to extend on the third axis 630, so that the third axis 630 and the second axis 620 intersect with each other and form an included angle of 30 degrees or more and 60 degrees or less. In one embodiment, the first grip portion 111 extends on the third axis 630, which means that the third axis 630 is defined as a center line passing through the center of the column of the second grip portion 112, and the center line passes through the middle point of the cross section where the second grip portion 112 and the first grip portion 111 intersect and the middle point of the cross section where the second grip portion 112 and the main body portion 120 intersect, respectively. In one embodiment, the fact that the first holding portion 111 extends on the third axis 630 means that the third axis 630 is an axis parallel to one of the side walls of the housing 100 of the first holding portion 111, and the first holding portion 111 mainly extends in this direction. Specifically, the first grip 111 uses a switch for controlling the operation of the reciprocating saw on the inner side of the grip hole, and the switch is connected to the drive circuit 510 and controls the opening and closing of the circuit. When in use, a user mainly holds the first holding part 111 and presses a switch arranged on the first holding part 111 to control the reciprocating saw to be turned on. The user holds the first holding part 111 and the other hand assists in holding the second holding part 112, so that the whole reciprocating saw inclines relative to the horizontal plane, and at the moment, the working accessory such as a saw blade is arranged at the lowest end of the whole reciprocating saw, so that the cutting operation can be carried out more deeply, the operable range of the reciprocating saw is enlarged, the operation of the user is facilitated, the human body mechanics is met, and the operation comfort is improved.

In the present embodiment, when the output shaft 200 and the battery pack axis 640 are parallel or approximately parallel, the battery pack 500 is disposed under the grip 110 and close to the first grip 111, and is inserted into the main body 120 through the connection terminal in a direction parallel to the battery pack axis 640, and the battery pack 500 extends under the first grip 111 along the direction of the battery pack axis 640, i.e., the first axis 610, while the motor 300 extends in the second grip 112 relatively perpendicular or approximately perpendicular to the first axis 610. The corresponding first holding portion 111 is disposed obliquely relative to the motor shaft 310, because the motor shaft 310 and the output shaft 200 are disposed vertically or approximately vertically, the second holding portion 112 is disposed obliquely relative to the output shaft 200, and the first axis 610 and the third axis 630 also have an included angle with a certain angle, corresponding to the included angle of the motor shaft 310 and the output shaft 200, and the included angle range of the first axis 610 and the third axis 630 is greater than or equal to 30 degrees and less than or equal to 60 degrees. The design of the angle meets the requirement that the corresponding inclination angle of the reciprocating saw meets the cutting requirement of the reciprocating saw after a user holds the holding part 110 by hand, and the control of the user is convenient. The output shaft 200, the motor shaft 310 and the first holding part 111 form a triangular relative position relationship, and are arranged in a way that the center of gravity of the reciprocating saw is near the first holding part 111 after the battery pack 500 is installed, and the projection of the center of gravity of the reciprocating saw in the direction of the second axis 620 is arranged in the projection of the holding part 110 in the direction of the second axis 620, so that the reciprocating saw is more stable when being used, the projection of the center of gravity in the direction of the second axis 620 is arranged in the projection of the holding part 110 in the direction of the second axis 620, namely the projection of the center of gravity in the direction of gravity is arranged in the projection of the holding part 110 in the direction of gravity when the reciprocating saw is used in a flush mode, so that a user can hold and use the reciprocating saw more easily, and the use fatigue of the user is.

Further, the driving shaft 410 is disposed parallel or approximately parallel to the second axis 620, the first driving gear 420 and the second driving gear 430 are parallel to the first axis 610, the first driving gear 420 is engaged with the motor shaft 310, and the balance weight 450 is parallel to the first driving gear 420 and the second driving gear 430 and disposed between the first driving gear 420 and the second driving gear 430, and the driving shaft 410, the first driving gear 420, the second driving gear 430 and the balance weight 450 are compactly disposed in parallel to the reciprocating saw and are relatively perpendicular to the motor 300.

The motor shaft 310 includes a first end and a second end along a first axis 610, defining a first plane perpendicular to the first axis 610 and passing through a first end surface of the first end; defining a second plane perpendicular to said first axis 610 and passing through a second end face of said second end, said first plane being parallel to said second plane, said motor shaft 310 being located between said first plane and said second plane; the drive shaft 410 is at least partially positioned between the first plane and the second plane. Preferably, the stator magnetic steel and the rotor magnetic steel are arranged between the first plane and the second plane, the ratio of the height of the transmission shaft 410 between the first plane and the second plane in the direction of the second axis 620 to the height of the transmission shaft 410 in the direction of the second axis 620 is greater than or equal to 85%, so that the heights of the transmission shaft 410 and other transmission elements in the direction of the first axis 610 are basically overlapped, and the projections of the transmission shaft and the rotor magnetic steel in the direction of the first axis are at least partially overlapped, thereby effectively reducing the size of the reciprocating saw in the direction of the second axis 620, namely reducing the height of the reciprocating saw, further enabling the transmission assembly 400 to be compact, effectively reducing the requirement on the space size of the installation cavity in the main body part 120, and further reducing the size of the whole.

Referring to fig. 4, the transmission assembly 400 is provided such that the body portion 120 can be reduced in size and can fit the size of the battery pack 500. In one embodiment, after the battery pack 500 is mounted and connected to the main body 120, the bottom surface of the battery pack 500 is flush with the bottom surface of the main body 120, so that the reciprocating saw can be placed flush on a table or other horizontal surface, and when a user needs to use the reciprocating saw to cut a lower workpiece, the saw blade is at the lowest end of the reciprocating saw machine, the battery pack 500 does not interfere with the downward movement of the saw blade, so that the reciprocating saw can be adapted to a lower cutting position, and the use of the reciprocating saw is convenient for the user.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by adopting equivalent replacement or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A reciprocating saw, comprising:

a housing including a grip portion for a user to grip and a main body portion;

the output shaft is arranged in the main body part, extends along a first axis, and supports and drives a working accessory to output;

the motor drives the output shaft to reciprocate, and comprises a motor shaft rotating around a second axis;

a transmission assembly connecting the motor and the output shaft;

a battery pack that supplies power to the motor;

the driving circuit is electrically connected with the battery pack and the motor;

the method is characterized in that:

the battery pack and the working accessory are arranged below the holding part, and the battery pack and the working accessory are arranged at two ends of the shell along the first axis.

2. The reciprocating saw as defined in claim 1, wherein: the first axis and the second axis intersect, and the intersection angle is greater than or equal to 70 degrees and less than or equal to 110 degrees.

3. The reciprocating saw as defined in claim 2, wherein: the first holding portion is obliquely arranged relative to the main body portion, the first holding portion is set to extend on a third axis, and an included angle formed by intersecting the third axis and the second axis is greater than or equal to 30 degrees and less than or equal to 60 degrees.

4. The reciprocating saw as defined in claim 2, wherein: the transmission assembly comprises a transmission shaft, the motor shaft comprises a first end and a second end along a first axial direction, and a first plane which is perpendicular to the first axial direction and passes through a first end surface of the first end is defined; defining a second plane which is perpendicular to the first axis and passes through a second end face of the second end, wherein the first plane is parallel to the second plane, the motor shaft is positioned between the first plane and the second plane, the motor comprises stator magnetic steel and rotor magnetic steel, and the stator magnetic steel and the rotor magnetic steel are arranged between the first plane and the second plane; the drive shaft is at least partially positioned between the first plane and the second plane.

5. The reciprocating saw as defined in claim 4, wherein: the projection of the transmission shaft and the rotor magnetic steel along the first axial direction at least partially overlaps.

6. The reciprocating saw as defined in claim 4, wherein: the transmission assembly further comprises a first transmission gear and a second transmission gear, the first transmission gear is meshed with the motor shaft, the first transmission gear and the second transmission gear are arranged in parallel relative to a first axis, and the transmission shaft is arranged in parallel with a second axis.

7. The reciprocating saw as defined in claim 6, wherein: the transmission assembly further comprises an eccentric block and a balance block, the balance block is arranged between the first transmission gear and the second transmission gear, and the eccentric block is connected to the second transmission gear.

8. The reciprocating saw as defined in claim 2, wherein: the battery pack further comprises a connecting terminal connected to the driving circuit, and a battery pack axis which penetrates through the connecting terminal is arranged in the insertion direction of the battery pack connected to the driving circuit, and the battery pack axis is arranged to be parallel to the output shaft.

9. The reciprocating saw as defined in claim 2, wherein: the battery package is still including the access drive circuit's connecting terminal sets up it is connected on the battery package has in its direction of insertion that connects connecting terminal's battery package axis, the battery package axis set up with the output shaft is crossing, and crossing angle is greater than zero and is less than 15 degrees.

10. The reciprocating saw as defined in any one of claims 1-9, wherein: a projection of a center of gravity of the reciprocating saw along a second axial direction is disposed within a projection of the grip portion along the second axial direction.