WO2021160118A1

WO2021160118A1 - Multi-function machine and working accessory thereof

Info

Publication number: WO2021160118A1
Application number: PCT/CN2021/076226
Authority: WO
Inventors: 钱富; 张士松; 鲁义刚
Original assignee: 苏州宝时得电动工具有限公司
Priority date: 2020-02-14
Filing date: 2021-02-09
Publication date: 2021-08-19
Also published as: CN113263478A; CN113263478B

Abstract

A working accessory (60), comprising: a working end (200) and a mounting plate (100); a first coupling part (1) for coupling to a first multi-function machine and a second coupling part (2) for coupling to a second multi-function machine are provided on the mounting plate (100); the first coupling part (1) and the second coupling part (2) are roughly arranged along the length direction of the working accessory (60); and at least one among the first coupling part (1) and second coupling part (2) is provided with an embedded protrusion (20) that protrudes from the mounting plate (100) or is recessed on the mounting plate (100) so as to form an embedded groove. The present invention also relates to a multi-function machine that comprises said working accessory (60). The multi-function machine and the working accessory (60) thereof may improve the applicability of the working accessory (60).

Description

Multifunctional machine and its working accessories

This application claims the priority of the Chinese patent application whose application date is February 14, 2020 and the application number is 202010093061.2, the entire content of which is incorporated into this application by reference.

Technical field

This application relates to a multifunctional machine and its working accessories, especially a swing multifunctional machine.

Background technique

The multifunction machine is a common swing power tool in the industry. Its working principle is that the output shaft swings around its own axis. Therefore, when users install different working accessories (also called working heads) on the free end of the output shaft, such as straight saw blades, circular saw blades, triangular sanding discs, and shovel scrapers, a variety of different Operation functions, such as sawing, cutting, grinding, scraping, etc., to adapt to different work requirements.

However, the working accessories currently on the market can only be installed on dedicated machines, which have poor applicability and are difficult to meet the actual needs of users.

In addition, the working accessory has a single mating interface, and when the mating interface is damaged, it can only be replaced and cannot be used continuously, and the reusability is poor.

Summary of the invention

In view of the above-mentioned shortcomings of the prior art, one purpose of this application is to provide a multifunctional machine and its working accessories to improve the applicability of the working accessories.

Another purpose of the present application is to provide a multi-function machine and its work accessories to improve the reusability of work accessories.

In order to achieve at least one of the above objectives, the technical solution adopted in this application is:

A working accessory, characterized in that the working accessory comprises: a working end and a mounting plate;

The mounting board is provided with a first matching portion and a second matching portion; the first matching portion and the second matching portion are arranged substantially along the length direction of the working accessory; the first The mating part is provided with a first mating hole; the first mating part is also provided with a first socket around the first mating hole, and the diameter of the outermost circle of the first socket is defined as D1; the second mating part has an embedding protrusion protruding from the mounting plate; the top of the embedding protrusion has a second mating hole, and the outermost of the bottom of the second mating part is located The diameter of the circle is D3; the distance between the center of the first matching hole and the center of the second matching hole is less than (D1+D3)/2 and greater than D1/2 and D3/2.

In order to achieve at least one of the above objectives, another technical solution adopted in this application is:

The mounting board is provided with a first mating part for mating with a first multi-function machine and a second mating part for mating with a second multi-function machine; the first mating part and the second mating part The mating parts are arranged substantially along the length direction of the working accessory; at least one of the first mating part and the second mating part has an embedding protrusion protruding from the mounting plate or is arranged on the mounting plate. The board is recessed to form an embedded groove.

Preferably, the first mating part is provided with a first mating hole; the first mating part is also provided with a first insertion hole around the first mating hole; the second mating part There is the embedding protrusion; the top of the embedding protrusion is provided with a second matching hole.

Preferably, the second matching hole is a closed hole.

Preferably, a driving side wall is formed between the top of the embedded protrusion and the mounting plate, and the driving side wall includes a plurality of radial recesses and radial protrusions spaced around the output axis.

Preferably, the diameter of the outermost circle of the first insertion hole is defined as D1; the diameter of the outermost circle of the bottom of the second mating portion is D3; the center of the first mating hole 11 and the The distance between the centers of the second matching holes 21 is less than (D1+D3)/2 and greater than D1/2 and D3/2.

Preferably, the distance between the center of the first matching hole and the center of the second matching hole is 19-30 mm.

Preferably, the second mating part is located between the first mating part and the working end.

Preferably, the second mating part is located between the first mating part and the working end, the first mating part and the second mating part both have the embedding protrusion, and The protrusion direction of the first mating portion is the same as the protrusion direction of the second mating portion.

Preferably, the protrusion height of the embedded protrusion is greater than 4 mm.

Preferably, the distance between the lower surface of the working end and the lower surface of the first mating portion along the convex direction of the embedding protrusion is greater than 5 mm.

Preferably, a first interference prevention part is further provided on a side of the embedding protrusion close to the first mating part; the first interference prevention part is arranged around the first mating part; the first The anti-interference part is a first arc-shaped structure formed on a circle with a diameter of 25 mm to 30 mm.

Preferably, the center of the circle corresponding to the first anti-interference part is closer to the second matching part than the center of the first mating hole, and the center of the circle corresponding to the first anti-interference part is closer to the first mating hole. The distance between the centers of the mating holes is 1 mm to 4 mm.

Preferably, a second anti-interference portion is further provided on a side of the first mating portion close to the second coupling portion; the second anti-interference portion is arranged around the embedding protrusion; the second anti-interference portion The interference portion is a second arc-shaped structure formed on a circle with the center of the second matching hole as the center and a diameter of 30 mm to 45 mm.

A multifunctional machine, including:

case;

A motor housed in the housing,

A motor shaft driven by the motor to make a rotary motion;

Output shaft used to install work accessories;

An eccentric swing mechanism arranged between the motor shaft and the output shaft; the eccentric swing mechanism converts the rotational movement of the motor shaft into the swing of the output shaft;

A clamping device arranged on the housing; the clamping device is used to hold a working accessory on the output shaft in a manner that can move around the axis of rotation;

Work attachment as described in the above embodiment.

Beneficial effects:

The working accessory provided by one embodiment of the present application provides different adapters by providing a first adapter and a second adapter. When one of the adapters is damaged, the other adapter can continue It can be used or used to match different multi-function machines, so that the reusability and applicability of the working parts can be improved, and the user experience can be improved.

With reference to the following description and drawings, specific embodiments of the present invention are disclosed in detail, indicating the ways in which the principles of the present invention can be adopted. It should be understood that the scope of the embodiments of the present invention is not limited thereby.

Features described and/or shown for one embodiment can be used in one or more other embodiments in the same or similar manner, combined with features in other embodiments, or substituted for features in other embodiments .

It should be emphasized that the term "comprising/comprising" when used herein refers to the existence of a feature, a whole, a step or a component, but does not exclude the existence or addition of one or more other features, a whole, a step or a component.

Description of the drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative labor.

Figure 1 is a top view of a working accessory provided by an embodiment of the present application;

Figure 2 is a perspective view of Figure 1;

Figure 3 is a perspective view of a working accessory provided by another embodiment of the present application;

Figure 4 is a top view of a working accessory provided by another embodiment of the present application;

Figure 5 is a perspective view of Figure 4;

FIG. 6 is a schematic diagram of a part of the structure of the multifunctional machine of FIG. 4;

Figure 7 is a front view of Figure 4;

Figure 8 is a top view of Figure 4;

Fig. 9 is a front view of a work accessory provided by another embodiment of the present application.

Detailed ways

In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described The embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work should fall within the protection scope of the present invention.

It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or there may be another element in the middle. When an element is considered to be "connected" to another element, it can be directly connected to the other element or the other element may exist at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only, and are not meant to be the only embodiments.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the present invention. The terminology used in the specification of the present invention herein is only for the purpose of describing specific embodiments, and is not intended to limit the present invention. The term "and/or" as used herein includes any and all combinations of one or more related listed items.

In the description of this application, unless otherwise indicated, the directional terms, such as front, back, left, right, up and down, etc., are relative to the direction of normal use of the power tool (such as a multifunction machine), as shown in Figure 1. Show, define the left in the drawing as the front, the right in the drawing as the back, etc.

Please refer to Figure 1 and Figure 2. In an embodiment of the present application, a working accessory 60 for a multifunction machine 50 is provided. The multifunction machine 50 can drive the work accessory 60 in a manner of moving around an output axis. Among them, the multifunction machine 50 can drive the work attachment 60 in a swinging manner to perform desired work.

Of course, an embodiment of the present application may also provide a multifunction machine 50 using the working accessory 60. The multifunction machine 50 has a housing 51, an output shaft extending from the inside of the housing 51, a work attachment 60 installed at the end of the output shaft, and a clamping device for fixing the work attachment 60 to the end of the output shaft. The clamping device is used to hold the work attachment 60 on the power tool in a movable manner around the rotation axis. The clamping device allows the power tool to clamp the working attachment 60 in the axial direction. The axial direction extends substantially parallel to the rotation axis of the output shaft.

The housing 51 is also provided with a motor, the motor has a motor shaft, and an eccentric transmission mechanism that converts the rotational motion output by the motor shaft into the swing motion of the output shaft. The eccentric transmission mechanism includes an eccentric part installed on the motor shaft and a shift fork sleeved on the output shaft. The eccentric is enclosed between the two sliding surfaces of the fork. When the eccentric member rotates, through the cooperation with the shift fork, its rotational movement is converted into a swing movement of the output shaft relative to its own rotational axis.

In this embodiment, the clamping device of the multifunction machine 50 clamps the working accessory 60 on the output shaft of the multifunction machine 50 in the axial direction, so that the work accessory 60 moves along with the output shaft. Specifically, the working attachment 60 follows the output shaft to make an oscillating movement around a rotation axis.

In this embodiment, the working accessory 60 includes: a working end 200 and a mounting plate 100. The mounting board 100 is provided with a first matching portion 1 and a second matching portion 2. The first matching portion 1 and the second matching portion 2 are arranged substantially along the length direction F1 of the working accessory 60. At least one of the first mating portion 1 and the second mating portion 2 has an embedding protrusion 20 protruding from the mounting board 100 or a recessed groove formed on the mounting board 100.

The working accessory 60 provided in this embodiment is provided with a first matching part 1 and a second matching part 2 to provide different matching parts. When one of the matching parts is damaged, the other matching part can still be used. Continue to use, which can improve the reusability of the working parts and enhance the user experience.

In addition, the first adapting part 1 and the second adapting part 2 can be different adapting parts to adapt to different multifunctional machines 50, thereby improving the applicability of the work accessory 60, and facing users with different multifunctions. When the machine is at 50 hours, the work can be continued without changing the working attachment 60, which effectively improves the tool use experience.

When facing the embodiment shown in FIGS. 1 and 7, the left and right direction is the length direction F1 of the working accessory 60, and the up and down direction is parallel to the projection direction F2 of the embedded projection. In this embodiment, the working end 200 is located at the front end of the working accessory 60, the first mating part 1 and the second mating part 2 are arranged in the left-right direction as a whole, and the first mating part 1 and the One of the second mating parts 2 is closer to the working end 200 than the other mating part. The working end 200 may be provided with serrations. Of course, in different embodiments, the working attachment 60 may be a sawing attachment, such as a straight saw blade; it may also be a polishing attachment, such as a finger sand board, a finger grinding blade, or a cutting attachment. , Such as rigid scraper, flexible scraper and so on.

With respect to the working end 200, the mounting board 100 is connected to the rear side of the working end 200, and the mounting board 100 is assembled on the multifunction machine 50 through the first mating part 1 or the second mating part 2 provided thereon. In this way, the working accessory 60 is driven by the multifunction machine 50. In order to make the working accessory 60 evenly stressed, at least one of the first matching portion 1 and the second matching portion 2 has a symmetrical structure. Preferably, the whole work attachment 60 can be a symmetrical structure.

In the embodiment of the present application, the first matching portion 1 and the second matching portion 2 may be different types of matching portions (matching interfaces), as shown in FIGS. 1 to 5 in the multiple embodiments. For the accessory 60, the first mating part 1 and the second mating part 2 are of different types, and the first mating part 1 does not have the embedding protrusion 20 embedded in the output shaft.

The working accessory 60 can be inserted into the output shaft of the multifunction machine 50 through the embedding protrusion 20. The side wall 23 of the embedding protrusion 20 matches the shape of the inner side wall of the output shaft and approximately fits, thereby forming a circumferential limit. , So that the working accessory 60 rotates along with the output shaft, so as to avoid relative rotation between the working accessory 60 and the output shaft.

Contrary to the insertion relationship between the embedding protrusion 20 and the output shaft, the inserted groove can be inserted into the end of the output shaft, and the shape of the insertion end of the output shaft can be similar to the shape of the embedding protrusion 20. The shape of the side wall of the insertion end of the shaft is adapted and approximately fit, thereby forming a circumferential limit, so that the working accessory 60 rotates with the output shaft, avoiding relative rotation between the working accessory 60 and the output shaft.

Of course, in the embodiment of the present application, the first mating part 1 and the second mating part 2 can also be the same type of mating interface. For example, the first mating part 1 and the second mating part 2 both have embedded The protrusion 20 or the embedded groove, of course, the shape and size of the embedding protrusion 20 or the embedded groove of the two may be the same or different, and this application is not particularly limited.

In the embodiment of the present application, at least one of the first mating portion 1 and the second mating portion 2 and the mounting board 100 are an integral structure. In the embodiment shown in FIGS. 1 to 2, the first mating portion 1 and the second mating portion 2 are integrated with the mounting board 100, and the embedding protrusion 20 can be formed by stamping on a part of the mounting board 100, or even Die casting molding. In the embodiment shown in FIG. 3, the first mating portion 1 and the mounting board 100 are an integral structure, wherein the first mating portion 1 is formed by opening a part of the mounting board 100. The second mating portion 2 is fixed on the mounting board 100 by welding or screwing. Of course, in other embodiments, both the first mating part 1 and the second mating part 2 can be fixed on the mounting board 100 by welding or screwing. This application is not exclusively limited.

The first matching part and the second matching part can be adapted to the corresponding multifunction machine 50, and the working accessory 60 can be fixedly installed on the output shaft. Generally, the multifunction machine 50 has a clamping shaft or an extension part of the clamping shaft embedded in the first mating part and the second mating part, and the working accessory 60 is axially clamped by the axial movement of the clamping shaft. For example, in the embodiment shown in FIG. 6, the end (lower end) of the clamping shaft is a pressure plate bolt 52, and the clamping shaft moves upward in the axial direction. Clamp.

The first mating part and the second mating part are located at different positions of the working accessory 60, and, in order to stabilize the swing of the working accessory 60, the first mating part and the second mating part are along the length direction F1 of the working accessory 60 Located in different parts. Both the first mating part and the second mating part have an embedded structure for embedding the clamping shaft, such as a first mating hole, a second mating hole, and correspondingly, the embedded structure of the first mating part and The embedded structure of the second mating part is located at different positions of the working accessory 60. In this embodiment, the center of the first mating hole and the center of the second mating hole are located at different positions.

In the embodiment shown in FIGS. 1 to 3, the first mating portion 1 is not provided with the embedding protrusion 20. Specifically, the first mating portion 1 is provided with a first mating hole 11. The side wall 23 of the mounting board 100 is formed with an opening 12 leading into the first matching hole 11. Wherein, in order to facilitate the assembly of the working accessory 60, the first mating portion 1 is far away from the working end 200 relative to the second mating portion 2. The second mating part 2 is located between the first mating part 1 and the working end, so that the rigidity of the working accessory 60 can be ensured. The opening 12 opens toward the side away from the working end 200 (toward the rear side).

The clamping device has a clamping shaft that moves in the axial direction. The clamping shaft is inserted into the first matching hole 11 of the first matching portion 1 through the opening 12, and then the working accessory 60 is axially clamped by axial movement. In order to avoid relative rotation of the working accessory 60 and the output shaft, the first mating portion 1 is further provided with a first insertion hole 13 around the first mating hole 11. The end of the output shaft may have an insertion protrusion inserted into the first insertion hole 13. The shape of the insertion protrusion may match the shape of the first insertion hole 13, for example, the first insertion hole 13 in FIG. 1 is a rectangular hole, and the insertion protrusion at the end of the output shaft may be a rectangular block. There are a plurality of first insertion holes 13 around the first mating hole 11, and correspondingly, the end of the output shaft may be provided with a plurality of insertion protrusions.

In this embodiment, the first mating portion 1 is directly formed by part of the openings of the mounting board 100 and does not protrude from the mounting board 100. In another embodiment, as shown in FIGS. 4 to 8, the first mating portion 1 may protrude from the mounting board 100 along the protrusion direction of the embedding protrusion. When the first mating portion 1 protrudes from the mounting plate 100, the lower surface 101 (underneath) of the first mating portion 1 forms an accommodating space for accommodating an axial compression structure such as a pressure plate bolt 52, which facilitates the grounding of the work accessory 60. Here, grounding refers to contact with the surface of the workpiece to be processed. Specifically, the first adapter 1 may be provided at the rear end of the mounting board 100 (the end far away from the working end 200). Wherein, the two parts of the first mating portion 1 are fixed on the mounting board 100 in a symmetrical manner, the two parts are provided with a first insertion hole 13, and the first mating hole 11 is formed between the two parts and the back Open opening 12.

In order to ensure that the working end of the working attachment 60 is in contact with the surface of the workpiece to be processed during the working process, the lower surface 201 of the working end 200 and the lower surface 101 of the first mating portion 1 are along the embedding protrusion 20. The distance L3 in the convex direction F2 is more than 5 mm, preferably 6-8 mm. In the embodiment shown in FIG. 7, the working end 200 is located on a flat plate body, and most of the accommodating space for accommodating the axial compression structure such as the pressing plate bolt 52 is provided by the upward protrusion of the first adapter portion 1. In this embodiment, both the first and

second mating parts

1 and 2 protrude from the mounting board 100, and the protrusion direction of the first mating part 1 and the protrusion direction of the second mating part 2 are the same.

In the embodiment shown in FIG. 9, there is a bending transition structure between the plate body where the working end 200 is located and the mounting plate 200, so that the height of the working end 200 relative to the mounting plate 100 is reduced. In this way, the first The amount of accommodating space provided by the mating part 1 reduces the requirement for the protrusion height of the first mating part 1. However, the distance L3 between the lower surface 201 of the working end 200 and the lower surface 101 of the first mating portion 1 along the convex direction F2 of the embedding protrusion 20 is still maintained at more than 5 mm, preferably 6-8 mm .

Further, in the embodiment in which the first mating portion 1 protrudes from the mounting board 100, the lower surface 101 of the first mating portion 1 may be flush with the top surface of the embedding protrusion 20. Correspondingly, the height L2 of the protruding mounting board 100 of the embedding protrusion 20 is the same as the height of the mounting board corresponding to the lower surface 101 of the first mating portion 1.

In this embodiment, the second mating portion 2 has the embedding protrusion 20. The cross-sectional area of the embedded protrusion 20 can gradually increase from the top 21 to the bottom. The bottom is flush with or slightly higher than the surface of the mounting board 100. The top 21 of the embedding protrusion 20 has a second matching hole 21. In this embodiment, both the first matching hole 11 and the second matching hole 21 are circular holes, and correspondingly, the center positions of the two are also the center positions of the circles. When the first matching hole 11 and the second matching hole 21 are polygonal holes or other non-circular holes, the center position of the two is also the centroid position of the cross section.

In order to make the working accessory 60 rotate with the output shaft, the second matching portion 2 is further provided with a driving side wall 23. Using the driving side wall, the second mating part 2 is mated with the clamping device so that the working accessory 60 can move (swing) around the rotation axis together with the output shaft. In this embodiment, a driving side wall 23 is formed between the top of the embedding protrusion 20 and the mounting board 100. The top 21 of the embedding protrusion 20 is substantially flat, and a second matching hole 21 is opened in the center. The protrusion height L2 of the embedding protrusion 20 is greater than 4 mm and less than 10 mm. Preferably it is 4.5 to 5.5 mm. In this way, torque transmission can be better realized.

The clamping device is provided with a retractable and expandable retaining device when the second mating portion 2 is mated. The retaining device passes through the second mating hole 21 in a contracted form, and expands outwards when inserted into the second mating hole 21 to form a hook to the second mating portion 2, and then moves axially until the embedding protrusion 20 is inserted. The top part 21 is axially clamped, and the embedding protrusion 20 is embedded in the output shaft to complete the assembly of the work attachment 60.

Specifically, the clamping device includes a holding device, and a driving device that drives the holding device to move between an open position (which can also be regarded as an expanded state) and a closed position (which can also be regarded as a contracted state). The specific structure and working principle of the driving device and the holding device can refer to the description in CN1054732126A. The holding device is connected to the clamping shaft as an extension part of the clamping shaft and moves axially following the clamping shaft. Wherein, the holding device includes relatively movable first and second members. In the open position, the first and second members are far away from each other. At this time, the working accessory 60 can be fixed and held on the output shaft; in the closed position, the first and second members are The second members are close to each other, and the working accessory 60 can be unloaded and removed from the output shaft or installed and replaced.

The second mating hole 21 can be adapted to different clamping devices with respect to the first mating hole 11. The first mating hole 11 is a non-closed hole. The clamping shaft is inserted into the first mating hole 11 through the side opening 12 during assembly. Correspondingly, the working accessory 60 is moved laterally during disassembly to allow the clamping shaft to pass The side opening 12 moves out. In order to enhance the strength of the second mating portion, the second mating hole 21 is a closed hole, which can be directly inserted into or removed from the second mating hole 21 in the axial direction during assembly.

In terms of preventing relative rotation, the first mating portion 1 rotates with the output shaft through the peripheral first insertion hole 13, and the embedding protrusion 20 rotates with the output shaft through the driving side wall 23. The cross section of the driving side wall 23 of the embedded protrusion 20 (a cross section perpendicular to the protrusion direction or a cross section parallel to the top surface of the embedded protrusion 20) has a non-circular profile. At this time, the driving side wall 23 of the embedding protrusion 20 forms a co-rotating structure. When the embedding protrusion 20 is inserted into the output shaft, the working accessory 60 and the output shaft move together by relying on the driving side wall 23 of the embedding protrusion 20.

Specifically, there are a plurality of surface points on the driving side wall 23, wherein the tangent plane on the surface point is inclined relative to the plane containing the output axis, and the tangent plane 23 is inclined relative to the radial plane extending perpendicular to the output axis, wherein, The distance between the noodle point and the output axis gradually increases from one axial end of the drive side wall 23 area to the other axial end of the drive side wall 23 area.

In this embodiment, the driving side wall 23 includes a plurality of radial recesses 28 and radial protrusions 27 spaced around the output axis. A plurality of radial recesses 28 and a plurality of radial protrusions 27 are arranged on the driving side wall 23. The radial recesses 28 and the radial protrusions 27 are spaced apart, and there is a radial direction between two adjacent radial recesses 28. The protrusion 27 has a radial recess 28 between two adjacent radial protrusions 27. Of course, this is the only limitation in the embodiment of the present application. For example, the cross section of the embedding protrusion 20 may also be a polygonal contour.

In other embodiments, the second mating portion 2 includes a second insertion hole (not shown) provided around the second mating hole 21. The second insertion hole can refer to the first insertion hole of the first matching portion 1, and a plurality of second insertion holes are arranged around the second matching hole 21 for insertion of the insertion protrusions. Wherein, the second insertion hole may be located around the embedding protrusion 20, which is not located on the embedding protrusion 20 but outside the embedding protrusion 20, for example, the insertion protrusion is located on the end surface of the output shaft, and the insertion protrusion 20 is embedded in the embedding protrusion 20. When the output shaft is inside, the insertion protrusion on the end surface of the output shaft is inserted into the second hole. As a preferred solution, the second insertion hole may be provided on the top of the embedding protrusion 20. At this time, the structure of the top of the embedding protrusion 20 is similar to that of the first mating portion 1. Of course, the second mating part 2 can have a second insertion hole and a non-circular side wall at the same time, so that the same second mating part 2 can be matched with different clamping devices, and the adaptability of the working accessory 60 can be improved.

In this embodiment, the line between the center 01 of the first mating hole 11 and the center 03 of the second mating hole 21 coincides with the line of symmetry of the first mating portion 1. Both the first mating hole 11 and the second mating hole 21 may be round holes, and the centers 01 and 03 of the two are both the center positions of the circles.

In order to ensure that the working accessories of the same length have a greater cutting depth, the first mating part 1 and the second mating part 2 are arranged reasonably. As shown in Figure 1, the diameter of the outermost circle of the first insertion hole 13 on the first mating part 1 can be defined as D1; the diameter of the outermost circle at the bottom of the second mating part 2 is D3; The distance L1 between the center of the first mating hole 11 and the center of the second mating hole 21 is less than (D1+D3)/2 and greater than any one of D1/2 and D3/2. The distance L1 between the center of the first matching hole 11 and the center of the second matching hole 21 is greater than 15 mm. Further, the distance L1 between the center of the first mating hole 11 and the center of the second mating hole 21 is 19-30 mm. Preferably it is 24.5 mm.

In order to prevent the embedding protrusion 20 from interfering with the mating of the first mating part 1, the embedding protrusion 20 is further provided with a first interference prevention part 24 on the side close to the first mating part 1. The first interference prevention part 24 is arranged around the first mating part 1. The first interference prevention portion 24 is formed on the embedding protrusion 20 to be a deformed structure away from the first mating section 1, so that the embedding protrusion 20 will interfere when the first mating section 1 is in use, making it difficult or impossible to install.

Specifically, the first anti-interference portion 24 is a first arc-shaped structure provided on the side of the embedding protrusion 20. The circle corresponding to the first anti-interference portion and the circle of the first mating hole are not concentrically arranged. The first arc-shaped structure may form an arc-shaped notch on the embedding protrusion.

As shown in FIG. 8, in order to make the replacement and installation of the first mating part smooth, the center 02 of the circle corresponding to the first interference prevention part 24 and the center 01 of the first mating hole 11 do not coincide with each other. Specifically, the center 02 corresponding to the first interference prevention portion 24 is closer to the working end 200 than the center 01 of the first mating hole 21. In this way, for example, when the pressure plate bolt 52 presses the plate body of the first mating portion 1 from bottom to top, there is a certain margin to ensure that the pressure plate bolt 52 is smoothly pressed. The circle center 02 corresponding to the first interference prevention portion 24, the center 01 of the first matching hole, and the center 03 of the second matching hole are located on the same straight line.

In this embodiment, the center of the circle corresponding to the first interference prevention part 24 is closer to the second mating part 2 than the center of the first mating hole 11. The distance L4 between the center 02 corresponding to the first interference prevention portion 24 and the center 01 of the first mating hole 11 is 1 mm to 4 mm. Wherein, the first interference prevention portion 24 is a first arc structure formed on a circle with a diameter of 25 mm to 30 mm. Further, the diameter D2 of the circle corresponding to the first interference prevention portion 24 is 26 mm.

Similarly, in this embodiment, in order to ensure that the working accessories of the same length have a greater cutting depth, here, the diameter of the outermost circle of the first insertion hole 13 on the first mating portion 1 can be defined as D1; The diameter of the outermost circle at the bottom of the second mating portion 2 is D3; the distance between the center of the first mating hole 11 and the center of the second mating hole 21 is less than (D1+D3)/2 , And greater than any one of D1/2 and D3/2. The distance L1 between the center of the first mating hole 11 and the center of the second mating hole 21 is greater than 15 mm. Further, the distance L1 between the center of the first mating hole 11 and the center of the second mating hole 21 is 19-30 mm. Preferably it is 24.5 mm.

In order to ensure the structural strength of the working accessory 60, the first interference prevention portion 24 and the second mating hole 21 are not communicated with each other. The first interference prevention portion 24 and the second mating hole 21 are spaced apart. In addition, as shown in FIG. 3, the mounting board 100 may be provided with a through hole opposite to the top 21 of the embedding protrusion 20 under the embedding protrusion 20. The projection of the top 21 of the embedding protrusion 20 in a direction perpendicular to the mounting board 100 is located in the through hole. The area of the through hole is larger than the area of the top 21 of the embedding protrusion 20.

When the first mating part 1 protrudes from the mounting board 100, in order to avoid interference of the first mating part 1 on the assembly of the second mating part 2, the first mating part 1 is close to the second mating part. One side of the part 2 is also provided with a second anti-interference part. For example, in the embodiment shown in Figures 4 to 8, the mounting board 100 is provided with a protruding first mating portion 1 and a second mating portion 2 at the same time. In order to avoid mutual interference, the second mating portion 2 is provided There is a first interference prevention portion 24, and a second interference prevention portion 14 is provided on the first mating portion.

Wherein, the second interference prevention portion 14 is arranged around the embedding protrusion 20. The second anti-interference portion 14 is a second arc-shaped structure provided on one side (front side) of the first mating portion 1. The circle corresponding to the second interference prevention portion 14 and the first mating hole 11 are arranged co-centrically. In order to improve the adaptability of the second mating part, the second anti-interference part 14 is a second arc formed on a circle with the center of the second mating hole as the center and a diameter of 30 mm to 45 mm. The structure is preferably a circle with a diameter of 35 mm to 40 mm. In this embodiment, the diameter of the circle corresponding to the second interference prevention portion 14 is 38 mm.

In the embodiment of the present application, the second mating portion 2 may be an integral structure with the mounting board 100, and the embedding protrusion 20 may be formed by stamping or die casting. In other embodiments, as shown in FIGS. 3 and 4, the second adapter portion 2 includes an adapter plate 25 fixed on the mounting board 100. A part of the adapter board 25 protrudes away from the mounting board 100 to form the embedding protrusion 20. Wherein, the adapter plate 25 has a welding part 26 fixed to the mounting plate 100 by welding around the embedding protrusion 20. Of course, in other embodiments, the adapter plate 25 can also be fixed to the mounting plate 100 by screwing.

Any numerical value quoted herein includes all values of the lower value and the upper value in increments of one unit from the lower limit value to the upper limit value, and there is a gap of at least two units between any lower value and any higher value. That's it. For example, if it is stated that the number of a component or the value of a process variable (such as temperature, pressure, time, etc.) is from 1 to 90, preferably from 20 to 80, and more preferably from 30 to 70, the purpose is to illustrate the The specification also explicitly lists values such as 15 to 85, 22 to 68, 43 to 51, and 30 to 32. For values less than 1, one unit is appropriately considered to be 0.0001, 0.001, 0.01, 0.1. These are only examples intended to be clearly expressed, and it can be considered that all possible combinations of numerical values listed between the lowest value and the highest value are clearly set forth in this specification in a similar manner.

It should be understood that the above description is for illustration and not for limitation. By reading the above description, many implementations and many applications beyond the examples provided will be obvious to those skilled in the art. Therefore, the scope of the present teaching should not be determined with reference to the above description, but should be determined with reference to the appended claims and the full scope of equivalents possessed by these claims. For comprehensive purposes, all articles and references including patent applications and publications are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the foregoing claims is not to abandon the subject matter, nor should it be deemed that the inventor did not consider the subject matter as part of the disclosed subject matter of the invention.

Claims

A working accessory, characterized in that the working accessory comprises: a working end and a mounting plate;

The mounting board is provided with a first matching portion and a second matching portion; the first matching portion and the second matching portion are arranged substantially along the length direction of the working accessory; the first The mating part is provided with a first mating hole; the first mating part is also provided with a first socket around the first mating hole, and the diameter of the outermost circle of the first socket is defined as D1; the second mating part has an embedding protrusion protruding from the mounting plate; the top of the embedding protrusion has a second mating hole, and the outermost of the bottom of the second mating part is located The diameter of the circle is D3; the distance between the center of the first matching hole and the center of the second matching hole is less than (D1+D3)/2 and greater than D1/2 and D3/2.
A working accessory, characterized in that the working accessory comprises: a working end and a mounting plate;

The mounting board is provided with a first mating part for mating with a first multi-function machine and a second mating part for mating with a second multi-function machine; the first mating part and the second mating part The mating parts are arranged substantially along the length direction of the working accessory; at least one of the first mating part and the second mating part has an embedding protrusion protruding from the mounting plate or is arranged on the mounting plate. The board is recessed to form an embedded groove.
The work accessory according to claim 2, wherein the first mating part is provided with a first mating hole; the first mating part is also provided with a first mating hole around the first mating hole A socket; the second mating portion has the embedding protrusion; the top of the embedding protrusion has a second mating hole.
The work accessory according to claim 3, wherein the second matching hole is a closed hole.
The work accessory according to claim 3, wherein a driving side wall is formed between the top of the embedded protrusion and the mounting plate, and the driving side wall includes a plurality of diameters spaced around the output axis. Concave and radially convex.
The work accessory according to claim 3, wherein the diameter of the outermost circle that defines the first insertion hole is D1; the diameter of the outermost circle of the bottom of the second mating portion is D3; The distance between the center of the first matching hole 11 and the center of the second matching hole 21 is less than (D1+D3)/2 and greater than D1/2 and D3/2.
The work accessory according to claim 3, wherein the distance between the center of the first matching hole and the center of the second matching hole is 19-30 mm.
The working accessory according to claim 3, wherein the second mating part is located between the first mating part and the working end.
The work accessory of claim 2, wherein the second mating part is located between the first mating part and the working end, and the first mating part and the second mating part are located between the first mating part and the working end. The connecting portions all have the embedding protrusions, and the protrusion direction of the first matching portion is the same as the protrusion direction of the second matching portion.
The work accessory according to claim 2, wherein the protrusion height of the embedded protrusion is greater than 4 mm.
The working accessory according to claim 2, wherein the distance between the lower surface of the working end and the lower surface of the first mating portion along the convex direction of the embedding protrusion is greater than 5 mm.
The work accessory according to claim 2, wherein a side of the embedding protrusion close to the first mating portion is further provided with a first anti-interference portion; the first anti-interference portion surrounds the The first matching portion is provided; the first anti-interference portion is a first arc-shaped structure formed on a circle with a diameter of 25 mm to 30 mm.
The work accessory of claim 12, wherein the center of the circle corresponding to the first interference prevention part is closer to the second mating part than the center of the first mating hole, and the first anti-interference part is closer to the second mating part than the center of the first mating hole. The distance between the center of the circle corresponding to the interference portion and the center of the first matching hole is 1 mm to 4 mm.
The work accessory according to claim 12, wherein a second anti-interference portion is provided on the side of the first matching portion close to the second matching portion; the second anti-interference portion surrounds the The embedding protrusion is provided; the second interference prevention portion is a second arc-shaped structure formed on a circle with the center of the second mating hole as the center and a diameter of 30 mm to 45 mm.
A multifunctional machine, characterized in that it comprises:

case;

A motor housed in the housing,

A motor shaft driven by the motor to make a rotary motion;

Output shaft used to install work accessories;

An eccentric swing mechanism arranged between the motor shaft and the output shaft; the eccentric swing mechanism converts the rotational movement of the motor shaft into the swing of the output shaft;

A clamping device arranged on the housing; the clamping device is used to hold a working accessory on the output shaft in a manner that can move around the axis of rotation;

A work accessory as claimed in any one of claims 1 to 14.