CN112207771A - Reciprocating electric tool - Google Patents
Reciprocating electric tool Download PDFInfo
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- CN112207771A CN112207771A CN202011207762.0A CN202011207762A CN112207771A CN 112207771 A CN112207771 A CN 112207771A CN 202011207762 A CN202011207762 A CN 202011207762A CN 112207771 A CN112207771 A CN 112207771A
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- 230000005540 biological transmission Effects 0.000 claims abstract description 90
- 230000007246 mechanism Effects 0.000 claims abstract description 55
- 230000033001 locomotion Effects 0.000 claims abstract description 28
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 description 5
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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Abstract
A reciprocating electric tool comprises a motor and a transmission mechanism, wherein the transmission mechanism comprises a reciprocating mechanism and a balance mechanism, the reciprocating mechanism comprises an eccentric gear driven by the motor and a reciprocating rod assembly connected with the eccentric gear, and the reciprocating rod assembly reciprocates along the longitudinal direction. The motor drives the transmission gear and the eccentric gear to rotate simultaneously, and the transmission gear drives the balance assembly to do reciprocating motion along the longitudinal direction in the direction opposite to that of the reciprocating rod assembly; the inertia forces of the reciprocating assembly and the balance assembly are equal in magnitude and opposite in direction, so that the resultant force of the reciprocating assembly and the balance assembly is zero. The motion tracks of the mass centers of the reciprocating rod assembly and the balance assembly are on the same straight line, so that no additional moment is generated while the inertia force is eliminated; i.e. theoretically, the vibration can be made zero, thereby completely eliminating the vibration.
Description
[ technical field ]
The invention relates to the technical field of electric tools, in particular to a reciprocating electric tool for eliminating vibration.
[ background art ]
Reciprocating motion mechanisms are applied to a plurality of mechanical products, such as reciprocating saws, jig saws and the like; in the mechanical products, the reciprocating motion of the working mechanism can generate larger inertia force, if the inertia force cannot be effectively eliminated in the operation of the mechanism, the whole mechanism generates an unbalanced force, so that vibration and impact are brought to the machine, and the use comfort of a user and the service life of the mechanism are seriously influenced. At present, in general reciprocating motion products, structures generating opposite inertia forces are designed in the reciprocating direction of a mechanism, so that unbalance generated by the inertia forces is weakened to a certain extent, but the structures can generate new inertia forces in other directions, so that new unbalance forces are brought, and a large influence is also existed. For this reason, need design a structure, this structure is when eliminating the inertia force in the direction of motion in with reciprocating motion, and the inertia force that produces in other directions also needs to obtain effectual control and elimination for vibration in all directions of mechanical product all obtains effective control, thereby promotes user's comfort level and product life.
Accordingly, there is a need for an improved reciprocating power tool that overcomes the deficiencies of the prior art.
[ summary of the invention ]
In view of the shortcomings of the prior art, the present invention provides a reciprocating power tool which can eliminate the inertia force without generating an additional moment and can completely eliminate the vibration.
The technical scheme adopted by the invention for solving the problems in the prior art is as follows: a reciprocating electric tool comprises a shell, a motor and a transmission mechanism, wherein the motor and the transmission mechanism are positioned in the shell, and the transmission mechanism comprises a gear box body, and a reciprocating mechanism and a balancing mechanism which are positioned in the gear box body. The reciprocating mechanism comprises an eccentric gear driven by the motor and a reciprocating rod assembly connected to the eccentric gear, and the reciprocating rod assembly reciprocates along the longitudinal direction. The balance assembly comprises a transmission gear positioned at the rear side of the eccentric gear and a balance assembly connected with the transmission gear, the motor simultaneously drives the transmission gear and the eccentric gear to rotate, and the transmission gear drives the balance assembly to do reciprocating motion along the longitudinal direction in the direction opposite to that of the reciprocating rod assembly.
The further improvement scheme is as follows: the driving gear and the eccentric gear are respectively positioned at the two longitudinal sides of the motor, the reciprocating mechanism comprises an eccentric pin which is positioned on the eccentric gear and is far away from the circle center of the eccentric gear, the balance mechanism comprises a transmission pin which is positioned on the driving gear and is far away from the circle center of the driving gear, and the eccentric pin and the transmission pin are arranged in central symmetry relative to the central axis of the motor.
The further improvement scheme is as follows: the eccentric gear and the transmission gear are the same in tooth number, and the product of the mass of the reciprocating rod assembly and the distance from the central axis of the eccentric pin to the center of the circle of the eccentric gear is equal to the product of the mass of the balance assembly and the distance from the central axis of the transmission pin to the center of the circle of the transmission gear.
The further improvement scheme is as follows: the reciprocating rod assembly comprises a reciprocating rod extending along the longitudinal direction, a cutter chuck positioned at one end of the reciprocating rod in the longitudinal direction and a sliding groove positioned at the other end of the reciprocating rod in the longitudinal direction, and the eccentric pin is connected into the sliding groove so that the eccentric gear drives the reciprocating rod assembly to reciprocate.
The further improvement scheme is as follows: the balance assembly is a balance block and is provided with a groove matched with the transmission pin and two long and thin slots extending along the longitudinal direction, the two long and thin slots are arranged at intervals in the transverse direction perpendicular to the longitudinal direction, the balance mechanism comprises two positioning pins penetrating through the two long and thin slots respectively, and two ends of the two positioning pins are fixed in the gear box body respectively so that the transmission gear drives the balance assembly to reciprocate.
The further improvement scheme is as follows: the balance assembly is provided with a gap which is adjacent to the sliding groove of the reciprocating rod and is positioned between the two elongated slots, and when the distance between the eccentric pin and the transmission pin is the shortest distance, the sliding groove of the reciprocating rod is accommodated in the gap of the balance assembly.
The further improvement scheme is as follows: the eccentric gear is provided with material escaping holes positioned at two sides of the eccentric pin, and the transmission gear is provided with material escaping holes positioned at two sides of the transmission pin, so that the mass center of the eccentric gear and the transmission gear is positioned on the center of circle.
The further improvement scheme is as follows: the motor comprises a motor shaft which protrudes into the transmission mechanism, the reciprocating mechanism comprises a first supporting shaft which penetrates through the circle center of the eccentric gear, the balancing mechanism comprises a second supporting shaft which penetrates through the circle center of the transmission gear, and the central axes of the first supporting shaft, the motor shaft and the second supporting shaft are located in the same plane.
The further improvement scheme is as follows: one end of the first supporting shaft is rotatably connected to the eccentric gear, and the other end of the first supporting shaft is fixedly connected to the gear box body; one end of the second support shaft is rotatably connected to the transmission gear, and the other end of the second support shaft is fixedly connected to the gear box body.
The further improvement scheme is as follows: the motion trail of the mass center of the reciprocating rod assembly and the motion trail of the mass center of the balance assembly are on the same straight line, and the eccentric gear and the transmission gear are arranged in central symmetry relative to the central axis of the motor.
Compared with the prior art, the invention has the following beneficial effects: the balance assembly comprises a transmission gear positioned at the rear side of the eccentric gear and a balance assembly connected with the transmission gear, the motor simultaneously drives the transmission gear and the eccentric gear to rotate, and the transmission gear drives the balance assembly to do reciprocating motion along the longitudinal direction in the direction opposite to that of the reciprocating rod assembly; the inertia force of the reciprocating assembly and the inertia force of the balance assembly are equal in magnitude and opposite in direction, and therefore the resultant force of the reciprocating assembly and the balance assembly is zero. Meanwhile, the motion trail of the mass center of the reciprocating rod assembly and the motion trail of the mass center of the balancing assembly are on the same straight line, so that the balancing assembly can eliminate the inertia force and simultaneously can not generate extra moment; that is, theoretically, the vibration of the reciprocating electric tool can be zero, so that the vibration can be completely eliminated.
[ description of the drawings ]
The following detailed description of embodiments of the invention is provided in conjunction with the appended drawings:
FIG. 1 is a perspective view of a reciprocating power tool in accordance with a preferred embodiment of the present invention;
FIG. 2 is a cross-sectional view of the reciprocating power tool shown in FIG. 1;
FIG. 3 is a schematic view of the motor and drive mechanism assembly of the reciprocating power tool of FIG. 1;
FIG. 4 is an exploded view of the motor and transmission shown in FIG. 3;
FIG. 5 is an exploded view of the motor and gear train shown in FIG. 4 from another angle;
fig. 6 is a cross-sectional view of the motor and transmission mechanism shown in fig. 3.
The meaning of the reference symbols in the figures:
100. reciprocating electric tool 1, housing 11, main body 110, first housing space 12, grip 120, second housing space 13, control button 14, second grip 2, motor 21, motor shaft 22, motor shaft tooth 3, transmission mechanism 31, gear housing 32, upper housing 33, lower housing 4, reciprocating mechanism 41, eccentric gear 42, reciprocating lever assembly 43, eccentric pin 44, reciprocating lever 45, tool holder 46, slide groove 47, first support shaft 5, balance mechanism 51, transmission gear 52, balance assembly 53, transmission pin 54, groove 55, elongated slot 56, positioning pin 57, second support shaft 58, notch 6, power supply assembly 7, shutter plate
[ detailed description of the invention ]
The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Words such as "upper," "lower," "front," "rear," and the like, which indicate orientation or positional relationship, are based only on the orientation or positional relationship shown in the drawings and are merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices/elements must have a particular orientation or be constructed and operated in a particular orientation and, therefore, should not be taken as limiting the present invention.
Referring to FIG. 1, a reciprocating power tool 100 according to the present invention is shown, in this embodiment, the reciprocating power tool 100 is a reciprocating saw operable to drive a cutter attachment (e.g., a saw blade) in a reciprocating motion to cut a workpiece. In other embodiments, the reciprocating power tool 100 may be a different type of device configured to drive a cutter attachment in a reciprocating motion.
Referring to fig. 1 to 2, the reciprocating electric tool 100 includes a housing 1, and a motor 2 and a transmission mechanism 3 located in the housing 1, and the tool attachment is connected to the transmission mechanism 3. The housing 1 is formed with a receiving space for mounting components such as a motor 2 and a transmission mechanism 3, the motor 2 is used for providing power to the reciprocating electric tool 100, and the transmission mechanism 3 is used for transmitting the power of the motor 2 to the cutter attachment so as to drive the cutter attachment to reciprocate to cut a workpiece. It will be appreciated that the reciprocating power tool 100 may be coupled with different cutter attachments to cut different objects.
The reciprocating power tool 100 further includes a power supply unit 6 for supplying power to the motor 2 and a baffle 7 provided at a front side of the tool attachment, and in this embodiment, the power supply unit 6 is embodied as a battery pack attached to the housing 1 below a rear end in a longitudinal direction. The flap 7 is provided at the longitudinal front end of the housing 1, and when cutting work is performed, the flap 7 is brought into contact with a material to be cut, so that cutting can be performed in a more reliable manner.
The housing 1 extends substantially in a longitudinal direction and is provided with a main body portion 11 and a holding portion 12 connected to the rear of the main body portion 11, the holding portion 12 can be held by a user and is provided with a control button 13 for operation, and the control button 13 is used for controlling the working state of the reciprocating electric tool 100. The accommodating space includes a first accommodating space 110 formed in the main body portion 11 and a second accommodating space 120 formed in the grip portion 12, and the first accommodating space 110 and the second accommodating space 120 are longitudinally arranged in the front-back direction. The first receiving space 110 is used for mounting power components such as the motor 2 and the transmission mechanism 3, and the second receiving space 120 is used for mounting components such as operating parts, electronic components, and circuit boards. It is understood that, in order to install the components with larger volume of the motor 2 and the transmission mechanism 3, the first accommodating space 110 is larger than the second accommodating space 120, and the first accommodating space 110 and the second accommodating space 120 are communicated or partially closed.
In the present embodiment, the main body portion 11 of the housing 1 is further formed with a second grip portion 14 that can be gripped by a user. Under a common cutting condition, a user can realize cutting operation by holding the holding part 12, but for some workpieces with hard texture or rough surface, the user needs to hold the second holding part 14 with one hand while holding the holding part 12 with the other hand, so that more stable and safer cutting operation is realized. In other embodiments, the second holding portion 14 may further be formed with holding grooves (not shown) according to the holding requirement of the user, and the holding grooves are substantially distributed according to the holding direction of the fingers and the gap, so as to facilitate the user to hold more firmly. With this design, the user can hold the reciprocating power tool 100 in a preferred state for a long period of time. This allows for more complex operating conditions and is more comfortable for the user during operation.
Referring to fig. 3 to 6, the motor 2 includes a motor shaft 21 protruding into the transmission mechanism 3 and a motor shaft tooth 22 located at the end of the motor shaft 21, and the motor shaft 21 extends in a vertical direction. In the present embodiment, the motor shaft teeth 22 are integrally formed on the motor shaft 21 by machining, but in other embodiments, the motor shaft teeth 22 may be a pinion gear that is assembled and fixed to the end of the motor shaft 21. The transmission mechanism 3 comprises a gear box body 31, and a reciprocating mechanism 4 and a balance mechanism 5 which are positioned in the gear box body 31, wherein the gear box body 31 comprises an upper box body 32 and a lower box body 33 which are buckled up and down, and the upper box body 32 and the lower box body 33 can be fixed together through a fastening piece such as a screw. In the present embodiment, the motor shaft 21 passes through the lower housing 33 and protrudes into the gear housing 31.
The reciprocating mechanism 4 comprises an eccentric gear 41 meshed with the motor shaft teeth 22, a reciprocating rod assembly 42 connected to the eccentric gear 41 and an eccentric pin 43 positioned on the eccentric gear 41 and far away from the center of the eccentric gear 41, and the motor 2 drives the reciprocating rod assembly 42 to reciprocate along the longitudinal direction through the eccentric gear 41. The reciprocating lever assembly 42 includes a reciprocating lever 44 extending in a longitudinal direction, a tool holder 45 at a longitudinally forward end of the reciprocating lever 44, and a slide groove 46 at a longitudinally rearward end of the reciprocating lever 44. The tool chuck 45 is used for clamping a tool accessory, and the eccentric pin 43 is connected to the sliding slot 46, so that the eccentric gear 41 drives the reciprocating rod assembly 42 to reciprocate.
Specifically, the motor shaft 21 rotates to drive the eccentric gear 41 to rotate, the eccentric pin 43 on the eccentric gear 41 is sleeved with a bearing, and the bearing is placed in the sliding groove 46, and since the sliding groove 46 is fixedly connected to the rear end of the reciprocating rod 44, when the motor shaft 21 rotates to perform a circular motion, the sliding groove 46 and the reciprocating rod 44 are driven by the bearing to perform a reciprocating motion along the longitudinal direction.
The balance assembly 5 comprises a transmission gear 51 meshed with the motor shaft teeth 22, a balance assembly 52 connected to the transmission gear 51 and a transmission pin 53 positioned on the transmission gear 51 and far away from the circle center of the transmission gear 51, and the motor 2 drives the balance assembly 52 to reciprocate along the longitudinal direction in the direction opposite to the reciprocating rod assembly 42 through the transmission gear 51. In this embodiment, the balancing component 52 is a balance block and is provided with a groove 54 matching with the transmission pin 53, specifically, the motor shaft 21 rotates to drive the transmission gear 51 to rotate, the transmission pin 53 on the transmission gear 51 is sleeved with a bearing and the bearing is placed in the groove 54, and when the motor shaft 21 rotates to do circular motion, the balancing component 52 is driven by the bearing to do reciprocating motion along the longitudinal direction.
As shown in fig. 5 to 6, the balancing assembly 52 is provided with two elongated slots 55 extending along the longitudinal direction, the two elongated slots 55 are arranged at intervals in the transverse direction perpendicular to the longitudinal direction, and the balancing mechanism 5 includes two positioning pins 56 respectively passing through the two elongated slots 55, and both ends of the two positioning pins 56 are respectively fixed in the upper case 32 and the lower case 33 of the gear case 31, so that the driving gear 51 drives the balancing assembly 52 to reciprocate only along the longitudinal direction.
In the present invention, the eccentric gear 41 and the transmission gear 51 have the same number of teeth, that is, the same angular velocity. Meanwhile, the product of the mass of the reciprocating lever assembly 42 and the distance from the central axis of the eccentric pin 43 to the center of the eccentric gear 41 is equal to the product of the mass of the balancing assembly 52 and the distance from the central axis of the driving pin 53 to the center of the driving gear 51. Accordingly, the inertial force generated by the balance assembly 52 during the reciprocating motion is the same as and opposite to the inertial force generated by the reciprocating rod assembly 42 during the reciprocating motion, i.e., the inertial forces of the two components cancel each other out.
Further, the central axes of the eccentric pin 43, the motor shaft 21 and the driving pin 53 are located in the same plane, and the reciprocating lever assembly 42 and the balancing assembly 52 reciprocate in the longitudinal direction, so that the movement locus of the center of mass of the reciprocating lever assembly 42 and the movement locus of the center of mass of the balancing assembly 52 are on the same straight line. So that the inertia forces generated between the two in other directions can also be mutually offset, and the total inertia resultant force generated by the whole transmission mechanism 3 in all directions is zero, thereby realizing the complete elimination of vibration.
Referring to fig. 6, the reciprocating mechanism 4 includes a first support shaft 47 penetrating through a center of the eccentric gear 41, the balancing mechanism 5 includes a second support shaft 57 penetrating through a center of the transmission gear 51, and central axes of the first support shaft 47, the motor shaft 21, and the second support shaft 57 are located in the same plane. Specifically, one end of the first support shaft 47 is rotatably connected to the eccentric gear 41, and the other end is fixedly connected to the lower case 33 of the gear case 31; one end of the second support shaft 57 is rotatably connected to the transmission gear 51, and the other end is fixedly connected to the lower case 33 of the gear case 31.
The eccentric gear 41 is provided with material escaping holes at two sides of the eccentric pin 43, and the transmission gear 51 is provided with material escaping holes at two sides of the transmission pin 53, so that the centers of mass of the eccentric gear 41 and the transmission gear 51 are both positioned at the center of the circle, and at the moment, the eccentric gear 41 and the transmission gear 51 can respectively prevent centrifugal force. In this embodiment, the eccentric gear 41 and the transmission gear 51 are respectively engaged with two longitudinal sides of the motor shaft tooth 22, and the eccentric gear 41 and the transmission gear 51 are arranged in central symmetry with respect to the central axis of the motor shaft 21, that is, the eccentric gear 41 and the transmission gear 51 have the same structure. In other embodiments, the eccentric gear 41 and the transmission gear 51 do not need to have the same structure, but only need to have the same number of teeth, that is, the same angular velocity.
In this embodiment, the counterbalance assembly 52 is provided with a gap 58 adjacent the slide slot 46 of the reciprocating lever 44 and between the two elongated slots 55, the gap 58 receiving the slide slot 46 of the reciprocating lever 44. When the distance between the eccentric pin 43 and the driving pin 53 is the shortest distance, the sliding groove 46 of the reciprocating rod 44 is received in the notch 58 of the balancing assembly 52, so that the driving mechanism 3 has a compact structure, the requirement for the size of the first receiving space 110 in the main body 11 is effectively reduced, and the overall size of the reciprocating electric tool 100 is reduced.
In the invention, the motor 2 drives the reciprocating rod assembly 42 to reciprocate along the longitudinal direction through the eccentric gear 41, and the motor 2 drives the balancing assembly 52 to reciprocate along the longitudinal direction in the opposite direction of the reciprocating rod assembly 42 through the transmission gear 51. Since the angular velocities of the eccentric gear 41 and the transmission gear 52 are the same, the product of the mass of the reciprocating lever assembly 42 and the distance from the central axis of the eccentric pin 43 to the center of the eccentric gear 41 is equal to the product of the mass of the balance assembly 52 and the distance from the central axis of the transmission pin 53 to the center of the transmission gear 51. Accordingly, the inertial force generated when the balance assembly 52 reciprocates is equal in magnitude and opposite in direction to the inertial force generated when the reciprocating rod assembly 42 reciprocates, and the resultant force of the two is zero, that is, the inertial forces of the two cancel each other out. Meanwhile, the motion trail of the mass center of the reciprocating rod assembly 42 and the motion trail of the mass center of the balancing assembly 52 are on the same straight line, so that the reciprocating electric tool 100 can eliminate the inertia force and simultaneously can not generate additional moment; that is, it is theoretically possible to make the vibration of the reciprocating electric power tool 100 zero, thereby completely eliminating the vibration.
The present invention is not limited to the above-described embodiments. Those skilled in the art will readily appreciate that there are numerous alternatives to the reciprocating power tool of the present invention without departing from the spirit and scope of the invention. The protection scope of the present invention is subject to the content of the claims.
Claims (10)
1. A reciprocating electric tool comprises a shell, a motor and a transmission mechanism which are positioned in the shell, wherein the transmission mechanism comprises a gear box body, a reciprocating mechanism and a balance mechanism which are positioned in the gear box body, the reciprocating mechanism comprises an eccentric gear driven by the motor and a reciprocating rod assembly connected with the eccentric gear, and the reciprocating rod assembly reciprocates along the longitudinal direction; the method is characterized in that: the balance assembly comprises a transmission gear positioned at the rear side of the eccentric gear and a balance assembly connected with the transmission gear, the motor simultaneously drives the transmission gear and the eccentric gear to rotate, and the transmission gear drives the balance assembly to do reciprocating motion along the longitudinal direction in the direction opposite to that of the reciprocating rod assembly.
2. The reciprocating power tool of claim 1, wherein: the driving gear and the eccentric gear are respectively positioned at the two longitudinal sides of the motor, the reciprocating mechanism comprises an eccentric pin which is positioned on the eccentric gear and is far away from the circle center of the eccentric gear, the balance mechanism comprises a transmission pin which is positioned on the driving gear and is far away from the circle center of the driving gear, and the eccentric pin and the transmission pin are arranged in central symmetry relative to the central axis of the motor.
3. The reciprocating power tool of claim 2, wherein: the eccentric gear and the transmission gear are the same in tooth number, and the product of the mass of the reciprocating rod assembly and the distance from the central axis of the eccentric pin to the center of the circle of the eccentric gear is equal to the product of the mass of the balance assembly and the distance from the central axis of the transmission pin to the center of the circle of the transmission gear.
4. The reciprocating power tool of claim 2, wherein: the reciprocating rod assembly comprises a reciprocating rod extending along the longitudinal direction, a cutter chuck positioned at one end of the reciprocating rod in the longitudinal direction and a sliding groove positioned at the other end of the reciprocating rod in the longitudinal direction, and the eccentric pin is connected into the sliding groove so that the eccentric gear drives the reciprocating rod assembly to reciprocate.
5. The reciprocating power tool of claim 4, wherein: the balance assembly is a balance block and is provided with a groove matched with the transmission pin and two long and thin slots extending along the longitudinal direction, the two long and thin slots are arranged at intervals in the transverse direction perpendicular to the longitudinal direction, the balance mechanism comprises two positioning pins penetrating through the two long and thin slots respectively, and two ends of the two positioning pins are fixed in the gear box body respectively so that the transmission gear drives the balance assembly to reciprocate.
6. The reciprocating power tool of claim 5, wherein: the balance assembly is provided with a gap which is adjacent to the sliding groove of the reciprocating rod and is positioned between the two elongated slots, and when the distance between the eccentric pin and the transmission pin is the shortest distance, the sliding groove of the reciprocating rod is accommodated in the gap of the balance assembly.
7. The reciprocating power tool of claim 2, wherein: the eccentric gear is provided with material escaping holes positioned at two sides of the eccentric pin, and the transmission gear is provided with material escaping holes positioned at two sides of the transmission pin, so that the mass center of the eccentric gear and the transmission gear is positioned on the center of circle.
8. The reciprocating power tool of claim 1, wherein: the motor comprises a motor shaft which protrudes into the transmission mechanism, the reciprocating mechanism comprises a first supporting shaft which penetrates through the circle center of the eccentric gear, the balancing mechanism comprises a second supporting shaft which penetrates through the circle center of the transmission gear, and the central axes of the first supporting shaft, the motor shaft and the second supporting shaft are located in the same plane.
9. The reciprocating power tool of claim 7, wherein: one end of the first supporting shaft is rotatably connected to the eccentric gear, and the other end of the first supporting shaft is fixedly connected to the gear box body; one end of the second support shaft is rotatably connected to the transmission gear, and the other end of the second support shaft is fixedly connected to the gear box body.
10. The reciprocating power tool of claim 1, wherein: the motion trail of the mass center of the reciprocating rod assembly and the motion trail of the mass center of the balance assembly are on the same straight line, and the eccentric gear and the transmission gear are arranged in central symmetry relative to the central axis of the motor.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011057778 | 2020-09-30 | ||
| CN2020110577788 | 2020-09-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112207771A true CN112207771A (en) | 2021-01-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022512226.3U Active CN214025543U (en) | 2020-09-30 | 2020-11-03 | Reciprocating electric tool |
| CN202011207762.0A Pending CN112207771A (en) | 2020-09-30 | 2020-11-03 | Reciprocating electric tool |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022512226.3U Active CN214025543U (en) | 2020-09-30 | 2020-11-03 | Reciprocating electric tool |
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| CN (2) | CN214025543U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN214025543U (en) * | 2020-09-30 | 2021-08-24 | 江苏东成工具科技有限公司 | Reciprocating electric tool |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH248587A (en) * | 1944-11-24 | 1947-05-15 | Ag Scintilla | Hand device with motor drive. |
| US3729823A (en) * | 1971-05-05 | 1973-05-01 | Gardner Denver Co | Reciprocation drive and counterweight arrangement for power saws |
| CN102615348A (en) * | 2012-04-11 | 2012-08-01 | 宁波黑松工具有限公司 | Reciprocating saw |
| CN203254010U (en) * | 2013-04-08 | 2013-10-30 | 宁波伊司达工具有限公司 | Electric reciprocating saw |
| CN105377510A (en) * | 2012-12-31 | 2016-03-02 | 罗伯特·博世有限公司 | Reciprocating tool with fluid driven counterweight |
| CN105592964A (en) * | 2013-10-04 | 2016-05-18 | 日立工机株式会社 | Reciprocating tool |
| CN110756898A (en) * | 2019-11-08 | 2020-02-07 | 浙江皇冠电动工具制造有限公司 | Reciprocating type power tool |
| US20200070265A1 (en) * | 2017-05-31 | 2020-03-05 | Bosch Power Tools (China) Co., Ltd. | Power Tool |
| CN214025543U (en) * | 2020-09-30 | 2021-08-24 | 江苏东成工具科技有限公司 | Reciprocating electric tool |
-
2020
- 2020-11-03 CN CN202022512226.3U patent/CN214025543U/en active Active
- 2020-11-03 CN CN202011207762.0A patent/CN112207771A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH248587A (en) * | 1944-11-24 | 1947-05-15 | Ag Scintilla | Hand device with motor drive. |
| US3729823A (en) * | 1971-05-05 | 1973-05-01 | Gardner Denver Co | Reciprocation drive and counterweight arrangement for power saws |
| CN102615348A (en) * | 2012-04-11 | 2012-08-01 | 宁波黑松工具有限公司 | Reciprocating saw |
| CN105377510A (en) * | 2012-12-31 | 2016-03-02 | 罗伯特·博世有限公司 | Reciprocating tool with fluid driven counterweight |
| CN203254010U (en) * | 2013-04-08 | 2013-10-30 | 宁波伊司达工具有限公司 | Electric reciprocating saw |
| CN105592964A (en) * | 2013-10-04 | 2016-05-18 | 日立工机株式会社 | Reciprocating tool |
| US20200070265A1 (en) * | 2017-05-31 | 2020-03-05 | Bosch Power Tools (China) Co., Ltd. | Power Tool |
| CN110756898A (en) * | 2019-11-08 | 2020-02-07 | 浙江皇冠电动工具制造有限公司 | Reciprocating type power tool |
| CN214025543U (en) * | 2020-09-30 | 2021-08-24 | 江苏东成工具科技有限公司 | Reciprocating electric tool |
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| CN214025543U (en) | 2021-08-24 |
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