Multifunctional machine

Abstract

The utility model relates to the technical field of mechanical transmission, and discloses a multifunctional machine, a motor output shaft, an eccentric transmission piece, a power output shaft and a cutting piece of the multifunctional machine jointly form a power transmission assembly, and in the power transmission assembly, a clutch mechanism is arranged between a cutting part of the cutting piece and the motor output shaft; when the power transmission assembly is in a normal working state, the cutting part of the cutting piece is rigidly connected with the output shaft of the motor, and when the power transmission assembly is in an overload protection state, rigid connection between the cutting part of the cutting piece and the output shaft of the motor is released. The clutch mechanism is configured to enable the power transmission assembly to be switched between the normal working state and the overload protection state according to the magnitude of the load transmitted to the output shaft of the motor by the cutting part, so that the situation that the motor assembly is damaged due to the fact that the load is too large during operation of the multifunctional machine can be prevented, and then the service life of the whole multifunctional machine is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical drive technical field, especially a kind of multifunctional machine. BACKGROUND

[0002] Multifunctional machine is also called swing machine, and its main function is to cut target object by reciprocating swing of saw blade driven by motor.

[0003] However, when the load transmitted by saw blade to motor is too large, motor is prone to damage, such as motor shaft cannot withstand load or motor burns out.

[0004] Therefore, how to prevent multifunctional machine from being damaged due to too large load during operation, so as to protect the service life of multifunctional machine as a whole, has become a technical problem to be solved in the field. SUMMARY

[0005] The utility model aims at least solve how to prevent multifunctional machine from being damaged due to too large load during operation, so as to protect the service life of multifunctional machine as a whole. The purpose is realized by the following technical scheme:

[0006] The utility model provides a kind of multifunctional machine, comprising: shell, with inner cavity;Motor assembly is located in inner cavity, motor assembly includes motor body and the motor output shaft that can rotate around its axial direction, motor output shaft extends along first direction;Eccentric transmission part is located in inner cavity, eccentric transmission part is connected with motor output shaft, eccentric transmission part is eccentric relative to the axis of motor output shaft;Swing assembly, including power output shaft, power output shaft extends along second direction and is connected with eccentric transmission part, second direction is perpendicular to first direction, power output shaft is configured to be able to reciprocating swing on the two sides of the axis of motor output shaft under the driving of motor output shaft and eccentric transmission part;And cutting piece is fixedly connected with power output shaft, cutting piece has cutting part, cutting part is located outside shell;Wherein, motor output shaft, eccentric transmission part, power output shaft and cutting piece jointly constitute power transmission assembly, and in power transmission assembly, cutting part and motor output shaft of cutting piece are also provided with coupling and separation mechanism between them;Power transmission assembly has normal working state and overload protection state, when power transmission assembly is in normal working state, cutting part of cutting piece and motor output shaft are rigidly connected, when power transmission assembly is in overload protection state, the rigid connection between cutting part of cutting piece and motor output shaft is removed, coupling and separation mechanism is configured to be able to switch power transmission assembly between normal working state and overload protection state according to the size of load transmitted by cutting part to motor output shaft.

[0007] The multifunctional machine is in normal working state, the motor assembly is started first, so that the motor output shaft rotates, the cutting part of the cutting member is rigidly connected with the motor output shaft, and the power transmitted by the motor output shaft is transmitted to the cutting part of the cutting member along the power transmission assembly under the action of the swing assembly, so that the cutting part can reciprocating swing on both sides of the axis of the motor output shaft, so as to realize the cutting of the target object, and the power transmission assembly is in normal working state; when the load transmitted by the cutting part to the motor output shaft is too large, the clutch mechanism switches the power transmission assembly to the overload protection state, that is, the rigid connection between the cutting part of the cutting member and the motor output shaft is released, so that the multifunctional machine is prevented from being damaged due to too large load during operation, and the service life of the multifunctional machine is guaranteed.

[0008] In some embodiments of the utility model, the swing assembly further includes a connecting piece, the connecting piece extends along the first direction, and two ends of the connecting piece in the first direction are a first connecting end and a second connecting end respectively, the first connecting end is connected with the power output shaft, and the second connecting end is connected with the eccentric transmission piece.

[0009] In some embodiments of the utility model, the power output shaft includes a shaft body extending along the second direction and a protruding part protruding from the outer wall of the shaft body, the protruding part is arranged around the circumference of the shaft body, and the protruding part is provided with a protruding gear ring; the first connecting end is sleeved on the outer wall of the shaft body, and the first connecting end is provided with a connecting gear ring, the connecting gear ring and the protruding gear ring are arranged in the second direction; when the power transmission assembly is in normal working state, the connecting gear ring and the protruding gear ring are engaged; when the power transmission assembly is in overload protection state, the connecting gear ring and the protruding gear ring are separated.

[0010] In some embodiments of the utility model, the power output shaft further includes a first clutch spring, the first clutch spring, the protruding gear ring and the connecting gear ring are arranged in the second direction in sequence, and the first clutch spring, the protruding gear ring and the connecting gear ring constitute the clutch mechanism; the first clutch spring is sleeved on the outer wall of the shaft body and can stretch and contract in the second direction, in the second direction, one end of the first clutch spring close to the connecting gear ring is connected with the first connecting end, and the other end of the first clutch spring away from the connecting gear ring is connected with the shaft body.

[0011] In some embodiments of the utility model, the first connecting end has a connecting hole for sleeving on the outer wall of the shaft body, and an abutting table is arranged in the connecting hole, the abutting table is arranged around the inner wall of the connecting hole, and in the second direction, one end of the first clutch spring close to the connecting gear ring is abutted with the abutting table.

[0012] In some embodiments of the utility model, second connecting end includes two clamping components that are arranged along third direction, along third direction, two clamping components have clamping space for clamping eccentric transmission between, third direction is perpendicular to first direction, third direction is perpendicular to second direction, eccentric transmission and two clamping components constitute clutch mechanism;Clamping component includes a clamping piece and a second clutch spring, and the second clutch spring can be telescopic along the third direction;In any clamping component, along third direction, one end of second clutch spring is connected with clamping piece, and the other end of second clutch spring is connected with the outer wall of eccentric transmission;When power transmission assembly is in normal working state, the length of two second clutch springs in third direction remains unchanged;When power transmission assembly is in overload protection state, two second clutch springs can be telescopic along third direction.

[0013] In some embodiments of the utility model, in any clamping component, the clamping piece is provided with a mounting hole for mounting the second clutch spring, and the mounting hole extends along the third direction, when the power transmission assembly is in normal working state, one end of the second clutch spring is located outside the mounting hole.

[0014] In some embodiments of the utility model, the cutting member includes a first piece and a second piece connected with the first piece, the first piece is connected with the power output shaft, the second piece is located outside the housing, and the cutting part is located at one end of the second piece away from the first piece.

[0015] In some embodiments of the utility model, the multifunctional machine further comprises a battery, and the battery is located in the inner cavity and used for supplying power to the motor assembly.

[0016] In some embodiments of the utility model, the battery is provided with a charging interface, and the housing is provided with a charging hole corresponding to the charging interface.

[0017] The above description is only a summary of the technical scheme of the application, in order to more clearly understand the technical means of the application, which can be implemented according to the content of the specification, and in order to make the above and other purposes, characteristics and advantages of the application more obvious and easy to understand, the following specific embodiments of the application are described. BRIEF DESCRIPTION OF DRAWINGS

[0018] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of illustrating the preferred embodiments and are not considered as limiting the utility model. Moreover, the same reference numerals are used to represent the same parts throughout the drawings. In the drawings:

[0019] Figure 1 The overall structure schematic diagram of multifunctional machine provided by the embodiments of the utility model is shown in the figure;

[0020] Figure 2 Part structure schematic view of multifunctional machine after part shell is removed for the utility model embodiment provides;

[0021] Figure 3 Sectional view of multifunctional machine for the utility model embodiment provides;

[0022] Figure 4 Structure schematic view of swing assembly in multifunctional machine for the utility model embodiment provides;

[0023] Figure 5 Structure schematic view of power output shaft in multifunctional machine for the utility model embodiment provides;

[0024] Figure 6 Structure schematic view of connecting piece in multifunctional machine for the utility model embodiment provides;

[0025] Figure 7 Cooperative relationship schematic view of connecting piece and eccentric transmission piece in multifunctional machine for the utility model embodiment provides;

[0026] Figure 8 Sectional view of the cooperative relationship of connecting piece and eccentric transmission piece in multifunctional machine for the utility model embodiment provides.

[0027] The reference signs are as follows:

[0028] 1, multifunctional machine;

[0029] 10, shell;11, inner cavity;12, charging hole;

[0030] 20, motor assembly;21, motor body;22, motor output shaft;23, connecting shaft;

[0031] 30, eccentric transmission piece;

[0032] 40, swing assembly;41, connecting piece;411, first connecting end;4111, connecting gear ring;4112, connecting hole;41121, abutment table;412, second connecting end;4121, clamping assembly;41211, clamping piece;412111, mounting hole;41212, second clutch spring;42, power output shaft;421, shaft body;422, protruding part;4221, protruding gear ring;423, first clutch spring;424, clamping part;

[0033] 50, cutting piece;51, first piece;52, second piece;521, cutting part;

[0034] 60, battery;61, charging interface;

[0035] 71, head;72, rod;

[0036] 81, compression nut; 82, limit spring;

[0037] 91, control assembly; 92, power switch;

[0038] a, clamping space. DETAILED DESCRIPTION

[0039] Example embodiments of the present disclosure will be described more fully hereinafter with reference to the accompanying drawings. While example embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can be embodied in various forms and should not be limited by 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 present disclosure to those skilled in the art.

[0040] 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" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has" 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. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order in which they are described, unless specifically identified as an order dependent step. It is also to be understood that additional or alternative steps can be employed.

[0041] Although the terms first, second, third, and the like can 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 can 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.

[0042] For the purposes of the description, relative terms of spatial relationships, such as "inner", "outer", "inward", "outward", "lower", "bottom", "upper", "top", and the like, can be used to describe one element's or feature's relationship to another element or feature as illustrated in the figures. Such relative terms can be used to describe the spatial relationships of the device in different orientations. For example, if the device in the figures is turned over, then the element described as "below" or "beneath" the other element or feature would then be oriented "above" or "over" the other element or feature. Thus, the example term "below" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0043] Figure 1 The overall structure schematic diagram of the multifunctional machine provided by the embodiment of the present application is shown in the figure; Figure 2 The partial structure schematic diagram of the multifunctional machine after removing part of the shell provided by the embodiment of the present application is shown in the figure; Figure 3 The sectional view of the multifunctional machine provided by the embodiment of the present application is shown in the figure; Figure 4 The structure schematic diagram of the swing assembly in the multifunctional machine provided by the embodiment of the present application is shown in the figure; Figure 5 The structure schematic diagram of the power output shaft in the multifunctional machine provided by the embodiment of the present application is shown in the figure; Figure 6 The structure schematic diagram of the connecting piece in the multifunctional machine provided by the embodiment of the present application is shown in the figure; reference Figures 1 to 6The utility model embodiment provides a kind of multifunctional machine 1, comprising: shell 10, with inner cavity 11;Motor assembly 20, in inner cavity 11, motor assembly 20 includes motor body 21 and the motor output shaft 22 that can rotate around its axial direction, motor output shaft 22 extends along first direction;Eccentric transmission member 30, in inner cavity 11, eccentric transmission member 30 is connected with motor output shaft 22, eccentric transmission member 30 is eccentric with respect to the axis of motor output shaft 22;Swing assembly 40, including power output shaft 42, power output shaft 42 extends along second direction and is connected with eccentric transmission member 30, second direction is perpendicular to first direction, power output shaft 42 is configured to be able to be driven under motor output shaft 22 and eccentric transmission member 30 in the axis of motor output shaft 22 two sides reciprocating swing;And cutting member 50, with power output shaft 42 fixed connection, cutting member 50 has cutting part 521, cutting part 521 is located in the outside of shell 10;Wherein, motor output shaft 22, eccentric transmission member 30, power output shaft 42 and cutting member 50 jointly constitute power transmission assembly, and in power transmission assembly, cutting part 521 of cutting member 50 and motor output shaft 22 are also equipped with coupling mechanism;Power transmission assembly has normal working condition and overload protection state, when power transmission assembly is in normal working condition, cutting part 521 of cutting member 50 and motor output shaft 22 rigid connection, when power transmission assembly is in overload protection state, the rigid connection between cutting part 521 of cutting member 50 and motor output shaft 22 is removed, coupling mechanism is configured to be able to according to the size of load that cutting part 521 is transmitted to motor output shaft 22 make power transmission assembly switch between normal working condition and overload protection state.

[0044] In the embodiment, the multifunctional machine 1 is in normal working condition, first start motor assembly 20, to make motor output shaft 22 rotate, because cutting part 521 of cutting member 50 and motor output shaft 22 are rigidly connected, and under the action of swing assembly 40, the power transmitted by motor output shaft 22 will ultimately be transmitted to cutting part 521 of cutting member 50 along power transmission assembly, so that cutting part 521 can reciprocate swing on both sides of the axis of motor output shaft 22 following power output shaft 42, to realize the cutting of target object, at this time, power transmission assembly is in normal working condition;When the load that cutting part 521 is transmitted to motor output shaft 22 is too large, coupling mechanism will switch power transmission assembly to overload protection state, i.e. the rigid connection between cutting part 521 of cutting member 50 and motor output shaft 22 is removed.

[0045] Therefore, this multi-functional machine 1, due to the clutch mechanism, can release the rigid connection between the cutting part 521 of the cutting piece 50 and the motor output shaft 22 when the multi-functional machine 1 is under excessive load during operation. This prevents the motor output shaft 22 from breaking or even the motor assembly 20 from burning out under excessive load, thus effectively ensuring the overall service life of the multi-functional machine 1.

[0046] Furthermore, since the clutch mechanism prevents the motor of the multi-function machine 1 from being damaged due to excessive load during operation, the multi-function machine 1 can be miniaturized. That is, there is no need to worry about the inability to withstand large loads due to factors such as the small diameter of the motor output shaft 22. It is easy to understand that the miniaturized multi-function machine 1 mentioned above is only an example to emphasize that the multi-function machine 1 of this utility model has the effect of overload protection. In actual working conditions, the specifications of the multi-function machine 1 should be determined according to the specific working conditions. Larger specifications of the multi-function machine 1 are also within the protection scope of this utility model.

[0047] It is easy to understand that the cutting part 521 can be a serrated tooth.

[0048] Moreover, such as Figure 3 As shown, the motor assembly 20 may also include a connecting shaft 23 extending along a first direction. The motor output shaft 22 is connected to the eccentric transmission member 30 through the connecting shaft 23, so as to realize the eccentric setting of the eccentric shaft relative to the axis of the motor output shaft 22.

[0049] Furthermore, it should be noted that the core objective of this utility model is to sever the rigid connection between the cutting part 50 and the motor output shaft 22. Typically, the clutch mechanism is located between the power output shaft 42 and the motor output shaft 22. This embodiment does not impose such a limitation, but instead proposes the concept of a power transmission assembly, and limits the location of the clutch mechanism to between the cutting part 521 and the motor output shaft 22. This is because if the cutting part 50 itself has a clutch mechanism (for example, a clutch mechanism is provided between the cutting part 521 and the end connecting the cutting part 50 and the power output shaft 42), it can ultimately achieve the switching between a rigid connection and a non-rigid connection between the cutting part 50 and the motor output shaft 22. Therefore, this embodiment does not limit the specific location of the clutch mechanism. As long as the clutch mechanism is located in the power transmission assembly and between the cutting part 521 and the motor output shaft 22, it should be included within the protection scope of this utility model.

[0050] like Figure 6As shown, according to an optional embodiment of the utility model, the swing assembly 40 further includes a connecting piece 41, the connecting piece 41 extends along a first direction, two ends of the connecting piece 41 in the first direction are a first connecting end 411 and a second connecting end 412 respectively, the first connecting end 411 is connected with the power output shaft 42, and the second connecting end 412 is connected with the eccentric transmission member 30.

[0051] In the embodiment, the eccentric transmission member 30 is connected with the power output shaft 42 through the connecting piece 41 to realize power transmission in the power transmission assembly; since the clutch mechanism is arranged between the cutting part 521 of the cutting member 50 and the motor output shaft 22 in the power transmission assembly and can switch the power transmission assembly from the normal working state to the overload protection state; then, the clutch mechanism is arranged between the eccentric transmission member 30, the connecting piece 41 and the power output shaft 42, and it is easy to understand that when the rigid connection between any two of the eccentric transmission member 30, the connecting piece 41 and the power output shaft 42 is released, the power transmission assembly can be switched from the normal working state to the overload protection state.

[0052] The specific structure of the clutch mechanism is described below:

[0053] Reference Figures 4 to 6 According to an optional embodiment of the utility model, the power output shaft 42 includes a shaft body 421 extending along a second direction and a protruding part 422 protruding from the outer wall of the shaft body 421, the protruding part 422 is arranged around the circumference of the shaft body 421, and the protruding part 422 is provided with a protruding gear ring 4221; the first connecting end 411 is sleeved on the outer wall of the shaft body 421, and the first connecting end 411 is provided with a connecting gear ring 4111, the connecting gear ring 4111 and the protruding gear ring 4221 are arranged in the second direction; when the power transmission assembly is in the normal working state, the connecting gear ring 4111 and the protruding gear ring 4221 are engaged; when the power transmission assembly is in the overload protection state, the connecting gear ring 4111 and the protruding gear ring 4221 are separated. The power output shaft 42 further includes a first clutch spring 423, the first clutch spring 423, the protruding gear ring 4221 and the connecting gear ring 4111 are arranged in the second direction in sequence, and the first clutch spring 423, the protruding gear ring 4221 and the connecting gear ring 4111 constitute the clutch mechanism; the first clutch spring 423 is sleeved on the outer wall of the shaft body 421 and can stretch and contract along the second direction, along the second direction, one end of the first clutch spring 423 close to the connecting gear ring 4111 is connected with the first connecting end 411, and the other end of the first clutch spring 423 away from the connecting gear ring 4111 is connected with the shaft body 421.

[0054] It is easy to understand that, in order to facilitate the fixation of both ends of the first clutch spring 423, the upper end of the first clutch spring 423 can be fixedly connected (for example, bonded) with the shaft body 421 along the second direction, and the lower end of the first clutch spring 423 can abut against the first connecting end 411 of the connecting piece 41.

[0055] In the embodiment, when the multifunctional machine 1 is in normal operation, at this time, the first clutch spring 423 is in the initial state, the connecting ring gear 4111 is engaged with the protruding ring gear 4221, and the power output shaft 42 is rigidly connected with the connecting piece 41, so as to realize that the cutting part 521 of the cutting member 50 can be rigidly connected with the motor output shaft 22, and the power transmission assembly is in the normal operation state, thus the cutting part 521 can reciprocate and swing on both sides of the axis of the motor output shaft 22 along with the power output shaft 42, so as to realize the cutting of the target object;

[0056] When the load transmitted by the cutting part 521 to the motor output shaft 22 is too large, since the first connecting end 411 is sleeved on the outer wall of the shaft body 421, and one end of the first clutch spring 423 close to the connecting ring gear 4111 is connected with the first connecting end 411, and the other end of the first clutch spring 423 away from the connecting ring gear 4111 is connected with the shaft body 421, along with the increase of the load, the first connecting end 411 of the connecting piece 41 will gradually move upward along the second direction by overcoming the elastic force of the first clutch spring 423, at this time, the first clutch spring 423 is in the compressed state (in the second direction, the length of the first spring in the compressed state is smaller than that in the initial state), and the connecting ring gear 4111 gradually disengages from the protruding ring gear 4221, so as to remove the rigid connection between the power output shaft 42 and the connecting piece 41, thereby removing the rigid connection between the cutting part 521 of the cutting member 50 and the motor output shaft 22, at this time, the power transmission assembly is switched to the overload protection state, thereby preventing the motor assembly 20 from being damaged due to the too large load during the operation of the multifunctional machine 1, and further protecting the service life of the multifunctional machine 1 as a whole.

[0057] Continuing to refer to Figures 4 to 6 , specifically, according to an optional embodiment of the utility model, the first connecting end 411 has a connecting hole 4112 for sleeving on the outer wall of the shaft body 421, and the connecting hole 4112 is provided with an abutment table 41121, the abutment table 41121 is arranged around the circumference of the inner wall of the connecting hole 4112, and one end of the first clutch spring 423 close to the connecting ring gear 4111 abuts against the abutment table 41121 along the second direction.

[0058] In the embodiment, it is easy to understand that the connecting hole 4112 is arranged to realize that the first connecting end 411 is sleeved on the outer wall of the shaft body 421;

[0059] In addition, as mentioned above, the lower end of the first clutch spring 423 can abut against the first connecting end 411 of the connecting piece 41 along the second direction; therefore, a circle of abutment tables 41121 is arranged in the connecting hole 4112 of the first connecting end 411 in the embodiment, so that the first connecting end 411 of the connecting piece 41 can abut against the first clutch spring 423 more stably.

[0060] Figure 7 A cooperation relationship diagram of the connecting piece and the eccentric transmission piece in the multifunctional machine is provided in the embodiment of the utility model; Figure 8 A cooperation relationship diagram of the connecting piece and the eccentric transmission piece in the multifunctional machine is provided in the embodiment of the utility model; Figures 1 to 8 According to an optional embodiment of the utility model, the second connecting end 412 comprises two clamping assemblies 4121 which are arranged at intervals along a third direction, the two clamping assemblies 4121 have a clamping space a for clamping the eccentric transmission piece 30 along the third direction, the third direction is perpendicular to the first direction, the third direction is perpendicular to the second direction, the eccentric transmission piece 30 and the two clamping assemblies 4121 constitute a clutch mechanism; the clamping assembly 4121 comprises a clamping piece 41211 and a second clutch spring 41212, the second clutch spring 41212 can be extended and contracted along the third direction; in any clamping assembly 4121, one end of the second clutch spring 41212 is connected with the clamping piece 41211 along the third direction, the other end of the second clutch spring 41212 is connected with the outer wall of the eccentric transmission piece 30; when the power transmission assembly is in a normal working state, the lengths of the two second clutch springs 41212 along the third direction remain unchanged; when the power transmission assembly is in an overload protection state, the two second clutch springs 41212 can be reciprocatingly extended and contracted along the third direction.

[0061] In the embodiment, when the multifunctional machine 1 is in normal working, at this time, the second clutch spring 41212 is in an initial state, that is, the eccentric transmission piece 30 cannot overcome the elastic force of the second spring when swinging, the lengths of the two second clutch springs 41212 along the third direction always remain unchanged, at this time, the eccentric transmission piece 30 can be regarded as being rigidly connected with the second connecting end 412, so that the cutting part 521 of the cutting piece 50 can be rigidly connected with the motor output shaft 22, the power transmission assembly is in a normal working state, therefore, the cutting part 521 can reciprocatingly swing on both sides of the axis of the motor output shaft 22 along with the power output shaft 42, so as to realize cutting of a target object;

[0062] When the load transmitted by the cutting part 521 to the motor output shaft 22 is too large, the eccentric driving part 30 overcomes the elastic force of the second clutch spring 41212 when swinging, that is, the two second clutch springs 41212 are alternately stretched and contracted in the third direction along with the swinging of the eccentric driving part 30; that is, at this time, the elastic connection (that is, the rigid connection is released) between the eccentric driving part 30 and the second end of the connecting piece 41 is released, thereby releasing the rigid connection between the cutting part 521 of the cutting part 50 and the motor output shaft 22, at this time, the power transmission assembly is switched to the overload protection state, thereby preventing the multifunctional machine 1 from being damaged due to the overload during operation, and playing a role in protecting the service life of the multifunctional machine 1 as a whole.

[0063] As shown in Figure 6 and Figure 8 Specifically, according to an optional embodiment of the utility model, in any clamping assembly 4121, the clamping piece 41211 is provided with a mounting hole 412111 for mounting the second clutch spring 41212, the mounting hole 412111 extends in the third direction, and when the power transmission assembly is in the normal working state, one end of the second clutch spring 41212 is located outside the mounting hole 412111.

[0064] In this embodiment, in order to facilitate the installation of the second clutch spring 41212, the mounting hole 412111 extending in the third direction is arranged on the clamping piece 41211, and the mounting hole 412111 can also play a guiding role when the second clutch spring 41212 is stretched and contracted;

[0065] In addition, since the two second clutch springs 41212 need to be able to reciprocate in the third direction when the power transmission assembly is in the overload protection state, the second clutch spring 41212 needs to be able to be compressed in a space when the power transmission assembly is in the normal working state, therefore, in this embodiment, the second clutch spring 41212 is configured such that when the power transmission assembly is in the normal working state, one end of the second clutch spring 41212 is located outside the mounting hole 412111 (that is, the end of the second spring for abutting against the eccentric driving part 30 protrudes out of the mounting hole 412111), so as to finally realize that the two second clutch springs 41212 can reciprocate in the third direction when the power transmission assembly is in the overload protection state, thereby finally realizing the release of the rigid connection between the cutting part 521 of the cutting part 50 and the motor output shaft 22.

[0066] It is easy to understand that the connecting piece 41 can be a yoke, and the above-mentioned two clutch mechanisms (one clutch mechanism includes: a first clutch spring 423, a convex gear ring 4221, and a connecting gear ring 4111, hereinafter, for the convenience of description, the clutch mechanism is referred to as the first mechanism. Another clutch mechanism includes: an eccentric transmission member 30 and a clamping assembly 4121; hereinafter, for the convenience of description, the clutch mechanism is referred to as the second mechanism) are only more convenient schemes provided according to the structure of the connecting piece 41, taking the swing assembly 40 including the connecting piece 41 as an example. In actual working conditions, the types of clutch mechanisms, the clutch modes, and the setting positions of the clutch mechanisms are not limited, as long as the power transmission assembly can be switched between the normal working state and the overload protection state according to the size of the load transmitted by the cutting part 521 to the motor output shaft 22. The specific types can be determined according to the working condition requirements.

[0067] In addition, for a multifunctional machine 1, either of the above-mentioned first mechanism and second mechanism can be selected as the clutch mechanism of the multifunctional machine 1; or the above-mentioned first mechanism and second mechanism can be provided in the same multifunctional machine 1 to further ensure that the clutch mechanism can protect the multifunctional machine 1 from overload. As described above, the type of clutch mechanism provided in a multifunctional machine 1 and the number of clutch mechanisms provided should be determined according to actual working condition requirements, and are not specifically limited.

[0068] As shown in Figures 1 to 3 According to an optional embodiment of the utility model, the cutting member 50 includes a first piece 51 and a second piece 52 connected with the first piece 51. The first piece 51 is connected with the power output shaft 42, the second piece 52 is located outside the housing 10, and the cutting part 521 is located at one end of the second piece 52 away from the first piece 51.

[0069] In this embodiment, the assembly method of the cutting member 50 is described in detail below by taking a case as an example:

[0070] Firstly, it is easy to understand that, for the convenience of assembly and disassembly of the cutting member 50, the cutting member 50 is preferably detachably connected with the power output shaft 42;

[0071] Therefore, the power output shaft 42 can be provided as a hollow shaft. A compression bolt is penetrated through the power output shaft 42 and the housing 10 from top to bottom along the second direction (i.e., the head 71 of the compression bolt is below, and the rod 72 is above), and then a compression nut 81 is arranged at the upper end of the housing 10 to fix the compression bolt. The first piece 51 of the cutting member 50 can be clamped between the lower end of the power output shaft 42 and the head 71 of the compression bolt, as shown in Figure 3 to achieve detachable connection of the cutting member 50.

[0072] Continuing to refer to Figure 2 andFigure 3 Specifically, the power output shaft 42 can further comprise a clamping portion 424 sleeved on the outer wall of the shaft body 421 and located at the lowermost end of the shaft body 421, and the first piece 51 of the cutting piece 50 can be clamped between the clamping portion 424 and the head 71 of the compression bolt during assembly.

[0073] In addition, as shown in Figure 3 , a limit snap spring 82 can be clamped on the outer side of the uppermost end of the rod portion 72 of the compression bolt to further ensure the stability of the assembly.

[0074] As shown in Figure 2 and Figure 3 , according to an optional embodiment of the utility model, the multifunctional machine 1 further comprises a battery 60, and the battery 60 is located in the inner cavity 11, and the battery 60 is used for power supply of the motor assembly 20.

[0075] In this embodiment, specifically, the multifunctional machine 1 can be further provided with a control assembly 91 and a power switch 92, the power switch 92 is used to control the opening and closing of the motor assembly 20, and the control assembly 91 is used to control the rotating speed of the motor output shaft 22, so as to further improve the working efficiency of the multifunctional machine 1.

[0076] According to an optional embodiment of the utility model, the battery 60 is provided with a charging interface 61, and the shell 10 is provided with a charging hole 12 corresponding to the charging interface 61.

[0077] In this embodiment, it is easy to understand that when the battery 60 is exhausted, in order to ensure the functionality of the multifunctional machine 1, the battery 60 needs to be replaced or charged;

[0078] Therefore, in this embodiment, the charging interface 61 is provided, and the charging hole 12 corresponding to the charging interface 61 is provided on the shell 10, so as to improve the charging efficiency of the battery 60;

[0079] In addition, it should be noted that the shell 10 can also be provided as a detachable structure, and in actual working conditions, when the battery 60 is exhausted, the operator can choose to replace the battery 60 or directly charge the battery 60 after disassembling the shell 10, so as to further improve the convenience.

[0080] The above is only a preferred specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the utility model, which should be covered within the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.

Claims

1. A multi-functional machine characterized by, The application relates to a cutting device, which comprises the following parts: a shell with an inner cavity; a motor assembly located in the inner cavity, the motor assembly comprising a motor body and a motor output shaft capable of rotating around its own axis, the motor output shaft extending along a first direction; an eccentric transmission part located in the inner cavity, the eccentric transmission part being connected with the motor output shaft, the eccentric transmission part being arranged eccentrically relative to the axis of the motor output shaft; a swing assembly comprising a power output shaft, the power output shaft extending along a second direction and being connected with the eccentric transmission part, the second direction being perpendicular to the first direction, the power output shaft being configured to reciprocally swing on both sides of the axis of the motor output shaft under the drive of the motor output shaft and the eccentric transmission part; and a cutting part fixedly connected with the power output shaft, the cutting part having a cutting section located outside the shell. The motor output shaft, the eccentric transmission part, the power output shaft and the cutting part jointly form a power transmission assembly, and a clutch mechanism is arranged between the cutting section of the cutting part and the motor output shaft in the power transmission assembly; the power transmission assembly has a normal working state and an overload protection state; when the power transmission assembly is in the normal working state, the cutting section of the cutting part is rigidly connected with the motor output shaft; when the power transmission assembly is in the overload protection state, the rigid connection between the cutting section of the cutting part and the motor output shaft is released; the clutch mechanism is configured to switch the power transmission assembly between the normal working state and the overload protection state according to the load transmitted by the cutting section to the motor output shaft. The swing assembly further comprises a connecting part extending along the first direction, two ends of the connecting part in the first direction being a first connecting end and a second connecting end respectively, the first connecting end being connected with the power output shaft, and the second connecting end being connected with the eccentric transmission part. The power output shaft comprises a shaft body extending along the second direction and a protruding part protruding from the outer wall of the shaft body, the protruding part being arranged around the circumference of the shaft body, and the protruding part being provided with a protruding gear ring; The first connecting end is sleeved on the outer wall of the shaft body, and the first connecting end is provided with a connecting gear ring, the connecting gear ring being arranged in the second direction and being spaced apart from the protruding gear ring; When the power transmission assembly is in the normal working state, the connecting gear ring is engaged with the protruding gear ring; When the power transmission assembly is in the overload protection state, the connecting gear ring is separated from the protruding gear ring. The power output shaft further comprises a first clutch spring, the first clutch spring, the protruding gear ring and the connecting gear ring being arranged in the second direction in sequence, and the first clutch spring, the protruding gear ring and the connecting gear ring constituting the clutch mechanism.

2. The multi-functional machine according to claim 1, wherein ​ 3. The multi-functional machine according to claim 2, wherein ​ ​ ​ ​ 4. The multi-functional machine according to claim 3, wherein ​ The first clutch spring is sleeved on the outer wall of the shaft body and can be extended and contracted along the second direction. Along the second direction, one end of the first clutch spring close to the connecting ring gear is connected with the first connecting end, and the other end of the first clutch spring away from the connecting ring gear is connected with the shaft body.

5. The multi-functional machine according to claim 4, wherein The first connecting end has a connecting hole for sleeving on the outer wall of the shaft body, and an abutting table is arranged in the connecting hole. The abutting table is arranged around the inner wall of the connecting hole. Along the second direction, one end of the first clutch spring close to the connecting ring gear is abutted with the abutting table.

6. The multi-functional machine according to claim 2, wherein The second connecting end comprises two clamping assemblies arranged in a third direction. Along the third direction, the clamping space for clamping the eccentric transmission member is arranged between the two clamping assemblies. The third direction is perpendicular to the first direction, and the third direction is perpendicular to the second direction. The eccentric transmission member and the two clamping assemblies constitute the clutch mechanism. The clamping assembly comprises a clamping piece and a second clutch spring. The second clutch spring can be extended and contracted along the third direction. In any clamping assembly, along the third direction, one end of the second clutch spring is connected with the clamping piece, and the other end of the second clutch spring is connected with the outer wall of the eccentric transmission member. When the power transmission assembly is in the normal working state, the lengths of the two second clutch springs in the third direction remain unchanged. When the power transmission assembly is in the overload protection state, the two second clutch springs can be reciprocally extended and contracted along the third direction.

7. The multi-functional machine according to claim 6, wherein In any clamping assembly, the clamping piece is provided with a mounting hole for mounting the second clutch spring. The mounting hole extends along the third direction. When the power transmission assembly is in the normal working state, one end of the second clutch spring is located outside the mounting hole.

8. The multi-functional machine according to claim 1, wherein The cutting member comprises a first piece and a second piece connected with the first piece. The first piece is connected with the power output shaft, and the second piece is located outside the housing. The cutting part is located at one end of the second piece away from the first piece.

9. The multifunction machine according to any of claims 1-8, wherein, The multifunctional machine further comprises a battery. The battery is located in the inner cavity, and the battery is used for supplying power to the motor assembly.

10. The multi-functional machine according to claim 9, wherein The battery is provided with a charging interface, and the housing is provided with a charging hole corresponding to the charging interface.

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