CN212734445U

CN212734445U - Reciprocating structure and electric tool with same

Info

Publication number: CN212734445U
Application number: CN202020784857.8U
Authority: CN
Inventors: 徐春明
Original assignee: Zhejiang Kaichuang Electric Co ltd
Current assignee: Zhejiang Kaichuang Electric Co ltd
Priority date: 2020-05-12
Filing date: 2020-05-12
Publication date: 2021-03-19
Anticipated expiration: 2030-05-12

Abstract

The utility model belongs to the technical field of electric tool, concretely relates to reciprocating structure and have reciprocating structure's electric tool, this reciprocating structure include driving piece, supporting seat and reciprocating lever, and the driving piece setting is in electric tool's casing, and supporting connection is on the casing, and reciprocating lever sliding connection is provided with the arc wall in the supporting seat in the reciprocating lever, and the reciprocating lever passes through the arc wall and is connected with driving piece eccentric, and the driving piece sets to be used for driving reciprocating lever reciprocating motion. According to the utility model discloses reciprocating structure is provided with the arc wall on reciprocating rod, and the driving piece action moves in the arc wall, makes reciprocating rod's motion have clearance characteristic, and simultaneously, reciprocating rod eccentric connection is on the driving piece, and clearance characteristic combines with eccentric motion's quick return characteristic, has improved reciprocating rod reciprocating motion's work efficiency.

Description

Reciprocating structure and electric tool with same

Technical Field

The utility model belongs to the technical field of electric tool, concretely relates to reciprocating structure and have reciprocating structure's electric tool.

Background

This section provides background information related to the present disclosure only and is not necessarily prior art.

The electric reciprocating saw is a common tool, the cutting object of the reciprocating saw can be wood, metal or the mixture of the wood and the metal, and the electric reciprocating saw is wide in cutting object, convenient to carry and suitable for occasions such as home decoration. The reciprocating saw cuts a workpiece through the linear reciprocating motion of a saw blade, the common reciprocating saw is a single saw blade, and the rotary motion of a motor is converted into the reciprocating motion of a reciprocating rod through various different transmission mechanisms, such as an eccentric wheel, a swing rod and the like.

Set up a connecting rod between reciprocating lever among the prior art and the driving piece, be provided with on the connecting rod with driving piece articulated circular port, when the driving piece passes through the motion of connecting rod drive reciprocating lever, reciprocating lever is uniform motion, when leading to carrying out the work piece cutting, and the cutting force is little, and work efficiency is low.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem of low work efficiency caused by the cutting force of the reciprocating rod in the prior art at least. The purpose is realized by the following technical scheme:

the utility model discloses a first aspect provides a reciprocating structure, include:

a driver disposed within a housing of the power tool;

the supporting seat is connected to the shell;

the reciprocating rod is connected in the supporting seat in a sliding mode, an arc-shaped groove is formed in the reciprocating rod, the reciprocating rod is eccentrically connected with the driving piece through the arc-shaped groove, and the driving piece is arranged to be used for driving the reciprocating rod to reciprocate.

According to the utility model discloses reciprocating structure, among the prior art, reciprocating rod is at uniform velocity reciprocating motion under the drive of driving piece, and cutting force is little, and work efficiency is low, and this application improves reciprocating structure, improves reciprocating structure's work efficiency, and then improves electric tool's work efficiency. The driving piece acts as a power source in the reciprocating structure, the arc-shaped groove is formed in the reciprocating rod, the driving piece moves in the arc-shaped groove, the reciprocating rod moves to have a gap characteristic, the reciprocating rod is eccentrically connected to the driving piece to achieve reciprocating motion of the reciprocating rod, the gap characteristic is combined with the quick return characteristic of the eccentric motion, and the working efficiency of the reciprocating rod in reciprocating motion is improved.

In some embodiments of the present invention, the driving member comprises:

the gear is connected to a motor of the electric tool;

the positioning disc is connected to the gear and provided with a positioning hole, and a space is formed between the center of the positioning hole and the center of the positioning disc;

the positioning pin is connected in the positioning hole and in the arc-shaped groove.

In some embodiments of the present invention, the reciprocating structure further comprises a sliding bearing connected to the housing;

the reciprocating lever includes:

the first rod body is connected in the sliding bearing and the supporting seat in a sliding manner;

the second rod body is vertically connected to the first rod body, and the arc-shaped groove is formed in the second rod body.

In some embodiments of the present invention, the reciprocating structure further comprises a needle bearing, the needle bearing is disposed on the positioning pin, and the positioning pin passes through the needle bearing and the arc-shaped groove is rotatably connected.

In some embodiments of the present invention, the first rod body comprises:

the cylindrical section is connected in the sliding bearing and the supporting seat in a sliding manner;

the flat section is connected to the cylindrical section, the second rod body is vertically connected to the flat section, and the flat section is in limit fit with the supporting seat.

In some embodiments of the present invention, the flat section is provided with lightening holes.

In some embodiments of the present invention, the support base comprises:

the two first limiting parts are oppositely arranged, the first limiting parts are connected to the shell, and the first limiting parts are arranged to limit the movement of the flat section;

two second spacing portions that the relative setting, the second spacing portion connect in first spacing portion, the spacing portion of second sets up to the removal of restriction cylinder section.

In some embodiments of the present invention, the reciprocating structure further includes a balance block, and the center of the positioning plate and the positioning pin are respectively connected to the balance block in a rotating manner.

In some embodiments of the present invention, the weight block comprises:

the positioning pin and the positioning disc are respectively connected with the first balance area;

the second balance area is connected to one side, far away from the positioning pin, of the first balance area, and the thickness of the second balance area is larger than that of the first balance area.

A second aspect of the present invention provides an electric tool, including the reciprocating structure in any one of the above technical solutions, the electric tool is a reciprocating saw.

According to the utility model discloses electric tool has the same advantage with above-mentioned reciprocating structure, no longer gives unnecessary details here.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

fig. 1 is an exploded schematic view of a reciprocating structure according to an embodiment of the present invention;

FIG. 2 is an assembled partial cross-sectional view of FIG. 1;

FIG. 3 is an enlarged schematic view of the structure shown at A in FIG. 2;

FIG. 4 is a perspective view of the reciprocating rod shown in FIG. 1;

FIG. 5 is a schematic perspective view of the supporting seat shown in FIG. 1;

fig. 6 is a perspective view of the weight shown in fig. 1.

The reference symbols in the drawings denote the following:

1. a drive member; 11. a gear; 12. positioning a plate; 13. positioning pins;

2. a supporting seat; 21. a first limiting part; 22. a second limiting part; 23. a connecting portion;

3. a reciprocating lever; 31. a first rod body; 32. a second rod body; 311. a cylindrical section; 312. a flattened section; 321. an arc-shaped slot; 3121. lightening holes; 3211. a first arcuate segment; 3212. a second arcuate segment; 3213. a third arc segment; 3214. a fourth arc segment;

4. a sliding bearing;

5. a needle bearing;

6. a counterbalance; 61. a first balance area; 62. a second equilibrium region;

7. a housing;

8. a saw blade;

9. an electric motor.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

As shown in fig. 1 to 6, according to an embodiment of the present invention, there is provided a reciprocating structure including:

a driver 1, the driver 1 being disposed within a housing 7 of the power tool;

the supporting seat 2 is connected to the shell 7;

reciprocating lever 3, reciprocating lever 3 sliding connection is in supporting seat 2, is provided with arc wall 321 on reciprocating lever 3, and reciprocating lever 3 passes through arc wall 321 and driving piece 1 eccentric connection, and driving piece 1 sets to be used for driving reciprocating lever 3 reciprocating motion.

According to the utility model discloses reciprocating structure, among the prior art, reciprocating rod 3 is at uniform velocity reciprocating motion under driving piece 1's drive, and the cutting force is little, and work efficiency is low, and this application improves reciprocating structure, improves reciprocating structure's work efficiency, and then improves electric tool's work efficiency. The saw blade 8 of the electric tool is connected to the reciprocating rod 3 to realize the reciprocating motion of the saw blade 8 through the motion of the reciprocating structure, and then a workpiece is cut. Driving piece 1 is as the power supply among the reciprocating structure, driving piece 1 moves, be provided with arc wall 321 on reciprocating rod 3, driving piece 1 is at arc wall 321 internal motion, make reciprocating rod 3's motion have the clearance characteristic, combine reciprocating rod 3 eccentric connection to realize reciprocating rod 3's reciprocating motion on driving piece 1, the clearance characteristic combines with eccentric motion's quick return characteristic, the work efficiency of reciprocating rod 3 reciprocating motion has been improved, and then electric tool's work efficiency has been improved.

In some embodiments of the present invention, as shown in fig. 1 to 3, the driving member 1 includes a gear 11, a positioning plate 12 and a positioning pin 13, the gear 11 is connected to the motor 9 of the electric tool, the positioning plate 12 is connected to the gear 11, and a positioning hole is provided on the positioning plate 12, an interval is provided between the center of the positioning hole and the center of the positioning plate 12, the positioning pin 13 is connected in the positioning hole, and the positioning pin 13 is connected in the arc-shaped groove 321. The center of the positioning hole is provided with a distance with the center of the positioning disc 12, so that eccentric connection is realized, and the size of the distance is determined according to the cutting range of the electric tool and the specification of the saw blade 8. The reciprocating rod 3 is connected with the positioning plate 12 through a positioning pin 13 for assembly and disassembly.

Wherein, the gear 11 is provided as a hollow structure, and the hollow structure provides an assembly space for the positioning plate 12 and the positioning pin 13, so as to reduce the volume of the electric tool. The quantity of locating hole can be one for installation reciprocating lever 3, also can be a plurality of, when carrying out reciprocating structure's assembly, is used for fixing a position other structures, improves assembly efficiency.

In some embodiments of the present invention, as shown in fig. 1 to 3, the reciprocating structure further comprises a sliding bearing 4, and the sliding bearing 4 is connected to the housing 7. The reciprocating lever 3 comprises a first lever body 31 and a second lever body 32, the first lever body 31 is connected in the sliding bearing 4 and the supporting seat 2 in a sliding manner, the second lever body 32 is vertically connected on the first lever body 31, and the arc-shaped groove 321 is formed in the second lever body 32. Along with the rotation of the driving part 1, the positioning pin 13 makes a circular motion with the center of the driving part 1 as the center, the circular motion can be decomposed into a motion in a first direction and a motion in a second direction perpendicular to the first direction, the positioning pin 13 makes a linear motion in a sliding manner between two ends of the arc-shaped groove 321, the motion in the first direction can be considered as a motion in the first direction, and the motion in the second direction is also a motion in the second rod body 32, the motion in the second direction is transferred to the first rod body 31, so that the first rod body 31 moves along the first direction, and the reciprocating linear motion of the reciprocating rod 3 is realized. The friction force during the reciprocating motion of the reciprocating rod 3 is reduced by the arrangement of the sliding bearing 4.

In some embodiments of the present invention, as shown in fig. 1 to fig. 3, the reciprocating structure further includes a needle bearing 5, the needle bearing 5 is disposed on the positioning pin 13, and the positioning pin 13 is rotatably connected to the arc-shaped groove 321 through the needle bearing 5. The design of the needle bearing 5 can reduce the friction force generated when the reciprocating rod 3 is rotationally connected with the positioning pin 13.

In some embodiments of the present invention, as shown in fig. 3 to 4, the arc-shaped groove 321 includes a first arc segment 3211, a second arc segment 3212, a third arc segment 3213 and a fourth arc segment 3214 which are connected in sequence, the first arc segment 3211 and the third arc segment 3213 are the same, and are both end limit positions of the arc-shaped groove 321, the second arc segment 3212 is connected with the first arc segment 3211 and the third arc segment 3213 respectively, as a limit to one side of the needle roller bearing 5, the fourth arc segment 3214 is connected with the first arc segment 3211 and the third arc segment 3213 respectively, as a limit to the other side of the needle roller bearing 5, the second arc segment 3212 and the fourth arc segment 3214 are concentric, but have different radiuses, and the difference of radiuses is greater than or equal to the diameter of the needle roller bearing 5.

In some embodiments of the present invention, as shown in fig. 4, the first rod 31 includes a cylindrical section 311 and a flat section 312, the cylindrical section 311 is slidably connected in the sliding bearing 4 and the supporting seat 2, the flat section 312 is connected on the cylindrical section 311, the second rod 32 is vertically connected on the flat section 312, and the flat section 312 is in limit fit with the supporting seat 2. The cylindrical section 311 is matched with the sliding bearing 4, the cylindrical section 311 is always in sliding connection with the sliding bearing 4 at two limit positions of the reciprocating structure, the cylindrical section 311 is simultaneously matched with the sliding bearing 4 and the supporting seat 2 at a certain limit position, the flat section 312 is always matched with the supporting seat 2, and in order to reduce the weight of the reciprocating structure, the structure of the first rod body 31 is divided into two parts, namely the cylindrical section 311 and the flat section 312.

In some embodiments of the present invention, as shown in fig. 4, lightening holes 3121 are provided on the flat section 312, and the lightening holes 3121 also play a role of lightening. The arc-shaped slot 321 on the second rod 32 not only enables the reciprocating motion, but also plays a role in reducing the weight.

The number of the weight-reducing holes 3121 may be one, or two or more, and is determined according to the specification of the flat section 312, and the number of the weight-reducing holes 3121 needs to balance the rigidity and strength of the flat section 312. In one embodiment, the lightening holes 3121 are provided in two.

In some embodiments of the present invention, as shown in fig. 1 and 5, the supporting seat 2 includes two first limiting portions 21 disposed opposite to each other and two second limiting portions 22 disposed opposite to each other. The support base 2 is connected to the housing 7 by a first stopper 21, and the first stopper 21 is configured to restrict the movement of the flat section 312. First spacing portion 21 and flat section 312 clearance fit, on the one hand, can not appear blocking in reciprocating rod 3 reciprocating motion's in-process, another convenience for the operation direction of electric tool is guaranteed to the not slope of restriction reciprocating rod 3 reciprocating motion in-process. The two first limiting portions 21 respectively limit two sides of the flat section 312 to improve the limiting effect. As mentioned above, at a certain limit, the cylindrical section 311 is engaged with the sliding bearing 4 and the supporting seat 2 at the same time, and the supporting seat 2 is required to allow the cylindrical section 311 to pass through as well as the flat section 312. Spacing portion 22 of second is connected on first spacing portion 21, and the removal of restriction cylinder section 311 is set to spacing portion 22 of second, and two spacing portions 22 of second and cylinder section 311 clearance fit, on the one hand, can not appear blocking in reciprocating motion's of reciprocating lever 3 in-process, and another convenience for the operation direction of electric tool is guaranteed to restriction reciprocating lever 3 reciprocating motion in-process can not slope. The two second limiting portions 22 respectively limit two sides of the cylindrical section 311 to improve the limiting effect. The first position-limiting portion 21 has a contour similar to that of the flat section 312, and the second position-limiting portion 22 has a contour similar to that of the cylindrical section 311, i.e., the second position-limiting portion 22 is configured in an arc-shaped structure.

The supporting base 2 and the housing 7 are detachably connected, and may be in a screw connection, a pin connection or an insertion connection, and in one embodiment, is in a screw connection. A connecting part 23 is further arranged on the outer side of the first limiting part 21, a connecting hole is formed in the connecting part 23, and a screw penetrates through the connecting hole to be connected to the shell 7. Two spacing portions 21 of first spacing portion 21 and two spacing portions 22 of second form the form of first spacing portion 21, spacing portion 22 of second, first spacing portion 21 and the spacing portion 22 end to end connection of second, in order to increase the intensity of supporting seat 2, can satisfy reciprocating rod 3 reciprocating motion's demand, first spacing portion 21, the spacing portion 22 of second, first spacing portion 21 and the spacing portion 22 of second structure as an organic whole.

In some embodiments of the present invention, as shown in fig. 1, fig. 2, fig. 3 and fig. 6, the reciprocating structure further includes a balance weight 6, and the center of the positioning plate 12 and the positioning pin 13 are rotatably connected to the balance weight 6 respectively. The driving piece 1 is used as a reference, the balance block 6 and the reciprocating rod 3 are connected to the positioning disc 12 in two opposite directions, the positioning disc 12 rotates under the driving of the driving piece 1, the balance block 6 and the reciprocating rod 3 move in opposite directions, and the balance block 6 can balance the inertia force of the reciprocating rod 3 in the reciprocating motion process. When the saw blade 8 stretches out, the balance block 6 is close to the rear part of the electric tool, when the saw blade 8 is withdrawn, the balance block 6 is close to the front part of the electric tool, the unbalanced force of the reciprocating rod 3 in the motion is eliminated, the electric tool is stable in operation and greatly reduced in vibration when in work, the operation is comfortable, and the cutting precision and the cutting efficiency are improved.

In some embodiments of the present invention, the balance weight 6 includes a first balance area 61 and a second balance area 62, the positioning pin 13 and the positioning plate 12 are respectively connected to the first balance area 61, the second balance area 62 is connected to one side of the first balance area 61 away from the positioning pin 13, and the thickness of the second balance area 62 is greater than the thickness of the first balance area 61. First balanced area 61 is fan-shaped structure, second balanced area 62 is the loop configuration, the two combines to form fan-shaped structure's balancing piece 6, but because thickness is different, the barycentric position of balancing piece 6 has been changed, in order to improve the balancing ability of balancing piece 6, when saw bit 8 stretches out, the focus of balancing piece 6 is close to electric tool's rear more, keep away from reciprocating lever 3 and saw bit 8 more promptly, when saw bit 8 withdraws, the focus of balancing piece 6 is close to electric tool's the place ahead more, be close to reciprocating lever 3 and saw bit 8 more promptly.

The first balance area 61 and the second balance area 62 are not limited to the above configuration, and only the weight is added to the side of the balance weight 6 away from the reciprocating rod 3 to change the position of the center of gravity.

Another embodiment of the present invention provides an electric tool, which includes the reciprocating structure in any of the above embodiments, wherein the electric tool is a reciprocating saw.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A reciprocating structure, comprising:

a driver disposed within a housing of the power tool;

the supporting seat is connected to the shell;

2. The reciprocating structure of claim 1, wherein the drive member comprises:

the gear is connected to a motor of the electric tool;

3. The reciprocating structure of claim 2, further comprising a plain bearing connected to the housing;

the reciprocating lever includes:

4. The reciprocating structure of claim 3, further comprising a needle bearing disposed on the locating pin, wherein the locating pin is rotatably coupled to the arcuate slot via the needle bearing.

5. The reciprocating structure of claim 3, wherein the first rod comprises:

6. The reciprocating structure of claim 5, wherein the flattened section is provided with lightening holes.

7. The reciprocating structure of claim 5, wherein the support base comprises:

8. The reciprocating structure of claim 3, further comprising a counterweight, wherein the center of the positioning plate and the positioning pin are rotatably coupled to the counterweight, respectively.

9. The reciprocating structure of claim 8, wherein the weight comprises:

10. A power tool comprising the reciprocating structure of any one of claims 1 to 9, wherein the power tool is a reciprocating saw.