CN113441789B - Reciprocating saw - Google Patents
Reciprocating saw Download PDFInfo
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- CN113441789B CN113441789B CN202110754575.2A CN202110754575A CN113441789B CN 113441789 B CN113441789 B CN 113441789B CN 202110754575 A CN202110754575 A CN 202110754575A CN 113441789 B CN113441789 B CN 113441789B
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- connecting rod
- crank
- guide rail
- linear guide
- output
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- 238000000034 method Methods 0.000 claims abstract description 6
- 230000005484 gravity Effects 0.000 claims description 8
- 230000000694 effects Effects 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D51/00—Sawing machines or sawing devices working with straight blades, characterised only by constructional features of particular parts; Carrying or attaching means for tools, covered by this subclass, which are connected to a carrier at both ends
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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Abstract
The invention discloses a reciprocating saw, which comprises a shell, a saw body and a main shaft, wherein the shell is provided with a saw body; the first crank connecting rod mechanism, the second crank connecting rod mechanism and the linear guide rail are fixed on the shell; the first crank-link mechanism comprises a first crank, a first intermediate link and an output link; the second crank-link mechanism comprises a second crank, a second middle connecting rod and a balancing weight. According to the invention, the rotary motion of the driven wheel is converted into the linear reciprocating motion of the output connecting rod along the linear guide rail through the first crank and the first intermediate connecting rod; the rotary motion of the driven wheel is converted into the linear reciprocating motion of the balancing weight along the linear guide rail through a second crank and a second intermediate connecting rod; the structure optimizes the balance effect of the reciprocating saw, so that the reciprocating saw is more stable in the operation process, the vibration is lower, and the operation experience of a user is improved.
Description
Technical Field
The invention belongs to the technical field of electric tools, and particularly relates to a reciprocating saw.
Background
The electric reciprocating saw is an electric tool for sawing by a reciprocating saw blade. Fig. 1 is a schematic view of a prior art reciprocating saw structure including a housing, a motor 11, a pinion 12, a driven gear 13, a connecting rod 14, an output shaft 15, and a counterweight 16. Wherein a driven gear 13 is engaged with the pinion gear 12 and is driven to rotate by the motor 11, the driven gear 13 being vertically positioned within the housing and having an upper portion and a lower portion; the connecting rod 14 is connected to the driven gear 13 to convert the rotational motion of the driven gear 13 into a reciprocating motion; the output shaft 15 is connected to the connecting rod 14 to reciprocate relative to the housing to complete the cutting stroke and the return stroke; the weight 16 is connected to the driven gear 13 to rotate with the driven gear 13, the weight 16 moving through an upper portion of the driven gear 13 during a cutting stroke of the output shaft 15, and the weight 16 moving through a lower portion of the driven gear 13 during a return stroke of the output shaft 15.
The above reciprocating saw has the following disadvantages: 1. the motion of the output shaft is reciprocating motion, the vibration direction of the output shaft is single axial direction, the motion of the balancing weight is rotary motion, the vibration direction is circumferential direction, and the axial direction and the radial direction can be decomposed into superposition, so that the output shaft which performs reciprocating motion is balanced by the balancing weight which performs rotary motion, and the balance weight has defects in principle; 2. the gravity center of the balancing weight and the gravity center of the output shaft are not at the same height, and extra moment can be generated in the movement process.
Disclosure of Invention
The technical problem to be solved by the invention is to provide the reciprocating saw, which optimizes the balance effect of the reciprocating saw, enables the reciprocating saw to be more stable and lower in vibration in the operation process, and improves the operation experience of a user.
In order to solve the technical problems, the invention adopts the following technical scheme: a reciprocating saw comprises a shell, a saw body and a main shaft; the first crank connecting rod mechanism, the second crank connecting rod mechanism and the linear guide rail are fixed on the shell;
the first crank-link mechanism comprises a first crank, a first intermediate link and an output link; one end of the first crank is fixed on the main shaft, and the other end of the first crank is connected with one end of a first intermediate connecting rod through a revolute pair; the other end of the first middle connecting rod is connected with one end of the output connecting rod through a revolute pair; the other end of the output connecting rod is connected with the saw body; the output connecting rod is connected to the linear guide rail; when the main shaft rotates, the output connecting rod makes linear reciprocating motion along the linear guide rail;
the second crank-connecting rod mechanism comprises a second crank, a second middle connecting rod and a balancing weight; one end of the second crank is fixed on the main shaft, and the other end of the second crank is connected with one end of a second intermediate connecting rod through a revolute pair; the other end of the second middle connecting rod is connected with a balancing weight through a revolute pair; the balancing weight is connected to the linear guide rail; when the main shaft rotates, the balancing weight does linear reciprocating motion along the linear guide rail, and the motion direction of the balancing weight is opposite to that of the output connecting rod.
Optionally, the first crank is at an angle of 180 ° to the second crank.
Optionally, the linear guide rail is in a circular tube shape, a circular tube inner hole of the linear guide rail is slidably sleeved on the periphery of the output connecting rod, and the balancing weight is slidably sleeved on the periphery of the circular tube of the linear guide rail.
Optionally, the center of gravity of the counterweight and the center of gravity of the output link are located on the same axis.
Optionally, the device also comprises a motor, a driving wheel and a driven wheel, wherein the driving wheel is connected to an output shaft of the motor, the driving wheel is meshed with the driven wheel, and a rotating shaft of the driving wheel is vertical to a rotating shaft of the driven wheel; an output shaft of the motor drives the driving wheel to rotate, and the driving wheel rotates to drive the driven wheel to rotate; the first crank and the second crank are respectively fixed on a rotating shaft of the driven wheel.
Optionally, the motion track of the output link is parallel to the output shaft of the motor.
Optionally, the driving wheel and the driven wheel are both bevel gears.
Optionally, the motor is a brushless motor.
The technical scheme adopted by the invention has the following beneficial effects:
according to the invention, the rotary motion of the driven wheel is converted into the linear reciprocating motion of the output connecting rod along the linear guide rail through the first crank and the first intermediate connecting rod; the rotary motion of the driven wheel is converted into the linear reciprocating motion of the balancing weight along the linear guide rail through a second crank and a second intermediate connecting rod; the structure optimizes the balance effect of the reciprocating saw, so that the reciprocating saw is more stable in the operation process, the vibration is lower, and the operation experience of a user is improved.
The following detailed description of the present invention and the advantages thereof will be described with reference to the accompanying drawings.
Drawings
The invention is further described with reference to the accompanying drawings and the detailed description below:
FIG. 1 is a schematic view of a prior art reciprocating saw;
FIG. 2 is a schematic view of the reciprocating saw according to the present invention in a working state;
FIG. 3 is a schematic view of a reciprocating saw according to the present invention in a second working state;
FIG. 4 is a schematic view of a reciprocating saw according to the present invention in a working state;
FIG. 5 is a schematic view showing the relationship between the positions of the first crank and the second crank of the reciprocating saw according to the present invention.
In the figure, 1, a linear guide rail; 2. a first crank; 3. a first intermediate link; 4. an output link; 5. a second crank; 6. a second intermediate link; 7. a counterweight block; 8. a motor; 9. a driving wheel; 10. a driven wheel.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
It will be appreciated by those skilled in the art that features from the examples and embodiments described below may be combined with each other without conflict.
The terminology used 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 an orientation or positional relationship, are based only on the orientation or positional relationship shown in the drawings, are merely for convenience in describing the present invention and to simplify the 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 construed as limiting the present invention.
The invention discloses a reciprocating saw, which comprises a shell, a saw body, a main shaft, a first crank connecting rod mechanism, a second crank connecting rod mechanism and a linear guide rail 1 fixed on the shell, as shown in figures 2 to 5.
The first crank-link mechanism comprises a first crank 2, a first intermediate link 3 and an output link 4; one end of the first crank 2 is fixed on the main shaft, and the other end of the first crank 2 is connected with one end of a first middle connecting rod 3 through a revolute pair; the other end of the first middle connecting rod 3 is connected with one end of an output connecting rod 4 through a revolute pair; the other end of the output connecting rod 4 is connected with the saw body; the output connecting rod 4 is connected to the linear guide rail 1; when the main shaft rotates, the output connecting rod 4 makes linear reciprocating motion along the linear guide rail 1;
the second crank-link mechanism comprises a second crank 5, a second intermediate link 6 and a balancing weight 7; one end of the second crank 5 is fixed on the main shaft, and the other end of the second crank 5 is connected with one end of a second intermediate connecting rod 6 through a revolute pair; the other end of the second intermediate connecting rod 6 is connected with a balancing weight 7 through a revolute pair; the balancing weight 7 is connected to the linear guide rail 1; when the main shaft rotates, the balancing weight 7 makes a linear reciprocating motion along the linear guide rail 1, and the motion direction of the balancing weight 7 is opposite to the motion direction of the output connecting rod 4.
In this embodiment, linear guide 1 is the pipe form, linear guide 1's pipe inner bore slip suit is in the periphery of output connecting rod 4, balancing weight 7 slip suit is in linear guide 1's pipe periphery.
Wherein, the gravity center of the balancing weight 7 and the gravity center of the output connecting rod 4 are positioned on the same axis, thereby achieving the optimal balancing effect.
The reciprocating saw also comprises a motor 8, a driving wheel 9 and a driven wheel 10, wherein the driving wheel 9 is connected to an output shaft of the motor 8, the driving wheel 9 is meshed with the driven wheel 10, and a rotating shaft of the driving wheel 9 is vertical to a rotating shaft of the driven wheel 10; an output shaft of the motor 8 drives the driving wheel 9 to rotate, and the driving wheel 9 rotates to drive the driven wheel 10 to rotate.
As shown in fig. 5, the first crank 2 is located on the upper side of the driven wheel 10, one end of the first crank 2 is fixed on the rotating shaft of the driven wheel 10, and the rotating shaft of the driven wheel is also the main shaft; the second crank 2 is positioned at the lower side of the driven wheel 10, and one end of the second crank 5 is fixed on the rotating shaft of the driven wheel 10; the angle between the first crank 2 and the second crank 5 is 180 degrees.
Wherein, the motion trail of the output connecting rod 4 is parallel to the output shaft of the motor 8.
In this embodiment, the driving wheel 9 and the driven wheel 10 are both bevel gears.
In the present embodiment, the motor 8 is a brushless motor.
When the electric vehicle works, the output shaft of the motor 8 drives the driving wheel 9 to rotate, and the driving wheel 9 rotates to drive the driven wheel 10 to rotate; the first crank 2 and the first intermediate connecting rod 3 convert the rotary motion of the driven wheel 10 into the linear reciprocating motion of the output connecting rod 4 along the linear guide rail 1; the second crank 5 and the second intermediate connecting rod 6 convert the rotary motion of the driven wheel 10 into the linear reciprocating motion of the balancing weight 7 along the linear guide rail 1; the movement direction of the counterweight 7 is opposite to the movement direction of the output connecting rod 4. This structure is rotary motion with traditional balancing weight and is changed into the balancing weight and be linear reciprocating motion, has optimized the balanced effect of reciprocating saw, makes reciprocating saw more steady in operation process, and the vibration is lower, has improved user's operation and has experienced.
Fig. 2 is a schematic view of the reciprocating saw in a working state according to the present invention, in which the output link 4 is located at the rearmost end of the linear guide rail 1, and the counterweight 7 is located at the foremost end of the linear guide rail 1; FIG. 3 is a schematic view of a second working state of the reciprocating saw according to the present invention, wherein the output link 4 is located at the foremost end of the linear guide 1, and the counterweight 7 is located at the rearmost end of the linear guide 1; fig. 4 is a schematic view of the reciprocating saw in a working state three, wherein the output link 4 is located at the middle position of the linear guide rail 1, and the counterweight 7 is located at the middle position of the linear guide rail 1.
While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that the invention includes, but is not limited to, the embodiments described herein. Any modifications which do not depart from the functional and structural principles of the present invention are intended to be included within the scope of the claims.
Claims (8)
1. A reciprocating saw comprises a shell, a saw body and a main shaft; the method is characterized in that: the first crank connecting rod mechanism, the second crank connecting rod mechanism and the linear guide rail are fixed on the shell;
the first crank-link mechanism comprises a first crank, a first intermediate link and an output link; one end of the first crank is fixed on the main shaft, and the other end of the first crank is connected with one end of a first intermediate connecting rod through a revolute pair; the other end of the first middle connecting rod is connected with one end of the output connecting rod through a revolute pair; the other end of the output connecting rod is connected with the saw body; the output connecting rod is connected to the linear guide rail; when the main shaft rotates, the output connecting rod makes linear reciprocating motion along the linear guide rail;
the second crank connecting rod mechanism comprises a second crank, a second middle connecting rod and a balancing weight; one end of the second crank is fixed on the main shaft, and the other end of the second crank is connected with one end of a second middle connecting rod through a revolute pair; the other end of the second middle connecting rod is connected with a balancing weight through a revolute pair; the balancing weight is connected to the linear guide rail; when the main shaft rotates, the balancing weight does linear reciprocating motion along the linear guide rail, and the motion direction of the balancing weight is opposite to that of the output connecting rod.
2. The reciprocating saw as defined in claim 1, wherein: the included angle between the first crank and the second crank is 180 degrees.
3. The reciprocating saw as defined in claim 2, wherein: the linear guide rail is in a circular tube shape, the inner hole of the circular tube of the linear guide rail is slidably sleeved on the periphery of the output connecting rod, and the balancing weight is slidably sleeved on the periphery of the circular tube of the linear guide rail.
4. The reciprocating saw of claim 3, wherein: the gravity center of the balancing weight and the gravity center of the output connecting rod are located on the same axis.
5. The reciprocating saw as defined in any one of claims 1-4, wherein: the motor is characterized by also comprising a motor, a driving wheel and a driven wheel, wherein the driving wheel is connected to an output shaft of the motor and is meshed with the driven wheel, and a rotating shaft of the driving wheel is vertical to a rotating shaft of the driven wheel; an output shaft of the motor drives the driving wheel to rotate, and the driving wheel rotates to drive the driven wheel to rotate; the first crank and the second crank are respectively fixed on a rotating shaft of the driven wheel.
6. The reciprocating saw as defined in claim 5, wherein: the motion trail of the output connecting rod is parallel to the output shaft of the motor.
7. The reciprocating saw as defined in claim 5, wherein: the driving wheel and the driven wheel are both bevel gears.
8. The reciprocating saw as defined in claim 5, wherein: the motor is a brushless motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110754575.2A CN113441789B (en) | 2021-07-05 | 2021-07-05 | Reciprocating saw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110754575.2A CN113441789B (en) | 2021-07-05 | 2021-07-05 | Reciprocating saw |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113441789A CN113441789A (en) | 2021-09-28 |
| CN113441789B true CN113441789B (en) | 2022-10-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110754575.2A Active CN113441789B (en) | 2021-07-05 | 2021-07-05 | Reciprocating saw |
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| CN (1) | CN113441789B (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2244448Y (en) * | 1995-08-14 | 1997-01-08 | 湖南农业大学 | Miniature reciprocating movable electric saw |
| GB2399615B (en) * | 2003-03-21 | 2006-03-15 | Black & Decker Inc | Vibration reduction apparatus for power tool and power tool incorporating such apparatus |
| US7814666B2 (en) * | 2007-02-13 | 2010-10-19 | Robert Bosch Gmbh | Linkage drive mechanism for a reciprocating tool |
| CN204234892U (en) * | 2013-06-06 | 2015-04-01 | 米沃奇电动工具公司 | Electric tool |
| CN104339031B (en) * | 2013-08-02 | 2018-08-21 | 博世电动工具（中国）有限公司 | Reciprocating drive mechanism and the electric tool for including the reciprocating drive mechanism |
| CN204882020U (en) * | 2015-06-23 | 2015-12-16 | 哈尔滨工程大学 | Mode test is with automatic device that strikes of variable wave form |
| CN108971628B (en) * | 2017-05-31 | 2021-02-02 | 博世电动工具（中国）有限公司 | Electric tool |
| CN212653399U (en) * | 2020-03-26 | 2021-03-05 | 创科无线普通合伙 | Balance mechanism and reciprocating motion type electric tool comprising same |
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- 2021-07-05 CN CN202110754575.2A patent/CN113441789B/en active Active
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| CN113441789A (en) | 2021-09-28 |
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Denomination of invention: A reciprocating saw Granted publication date: 20221011 Pledgee: Agricultural Bank of China Limited by Share Ltd. Jinhua Economic Development Zone Branch Pledgor: Zhejiang Crown Electric Tools Manufacture Co.,Ltd. Registration number: Y2024980041571 |