Electric tool

Abstract

The utility model particularly relates to an electric tool which comprises a machine shell assembly, a driving device, an eccentric assembly, a vibration reduction assembly and a working accessory. The machine shell assembly comprises a first shell body and a second shell body which are connected. The driving device is arranged in the first shell. The eccentric assembly comprises a first part and a second part, the first part is rotatably arranged on the first shell and is in transmission connection with the driving device, the second part is rotatably arranged on the second shell, the second part is in transmission connection with the first part, and the second part is provided with an eccentric outer circle used for driving. The vibration reduction assembly is arranged between the first shell and the second shell, and the vibration reduction assembly is matched with the first shell and the second shell. The working accessory is in transmission connection with the eccentric outer circle through the shifting fork assembly. According to the electric tool, the vibration reduction assembly is arranged between the first shell and the second shell, so that the vibration effect of the first shell can be reduced when the electric tool works, and vibration of the holding part of an operator can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electric tools, in particular to an electric tool. Background Art

[0002] The oscillating shovel, also known as the universal tool, is a reciprocating oscillating electric tool. The motor in the housing drives the blade connected to the output shaft to do reciprocating motion. By replacing the blade installed on the head, the oscillating shovel can achieve multiple functions such as cutting, grinding, scraping, roughing and polishing. It is convenient and practical. Cutting is an important function of the oscillating shovel and is frequently used in the fields of woodworking and construction.

[0003] At present, the existing swing shovel includes a housing, and a motor and a transmission assembly are arranged inside the housing. However, since the existing transmission assembly, the housing and the motor are rigidly fixed to each other, the vibration generated by the transmission assembly during operation will be transmitted to the operator through the housing, which eventually leads to the problem of large vibration of the power tool. At the same time, since the transmission assembly mostly adopts a cantilever eccentric structure, it is easy to cause the mechanical structure to have a short life and large vibration and other undesirable problems. Utility Model Content

[0004] The purpose of the utility model is to at least solve the problem of large vibration of existing electric tools during use. This purpose is achieved through the following technical solutions:

[0005] The utility model provides an electric tool, which comprises:

[0006] A housing assembly, the housing assembly comprising a first housing and a second housing connected to each other;

[0007] A driving device, the driving device is arranged inside the first housing;

[0008] An eccentric assembly, the eccentric assembly comprising a first part and a second part, the first part being rotatably disposed on the first housing and being transmission-connected to the driving device, the second part being rotatably disposed on the second housing, the second part being transmission-connected to the first part, and the second part having an eccentric outer circle for driving;

[0009] A vibration reduction assembly, the vibration reduction assembly is disposed between the first shell and the second shell, and the vibration reduction assembly is matched with the first shell and the second shell respectively;

[0010] A working accessory is connected to the eccentric outer circle through a fork assembly.

[0011] The electric tool described in the utility model includes a housing assembly, a driving device, an eccentric assembly, a vibration reduction assembly and a working accessory, wherein the first housing is provided with a driving device, and the second housing is provided with a working assembly and a fork assembly. By setting the eccentric assembly as a matching structure of the first part and the second part, and setting the first part on the first housing, and the second part on the second housing, the electric tool can be divided into a power part (including the first housing) and a working part (including the second housing). When the electric tool is working, the vibration generated by the working part will be transmitted to the power part, and at this time, by setting the vibration reduction assembly between the first housing and the second housing, the vibration effect of the first housing can be reduced when the electric tool is working, thereby helping to reduce the vibration of the operator's grip, thereby effectively reducing the damage to the human body caused by the vibration of the electric tool, so as to improve the comfort of using the electric tool.

[0012] In addition, the electric tool according to the utility model may also have the following additional technical features:

[0013] In some embodiments of the present invention, the second part is arranged on the second housing through a bearing assembly; the vibration reduction assembly includes:

[0014] A vibration damping member is sandwiched between the bearing assembly and the first housing.

[0015] In some embodiments of the present invention, the bearing assembly comprises:

[0016] a mounting member, the mounting member being sealed and connected to the second housing;

[0017] The second bearing is embedded in the mounting member and is sleeved and fixed on the outer peripheral surface of the second part.

[0018] In some embodiments of the present invention, the vibration reduction assembly includes:

[0019] An elastic member is sandwiched between the first shell and the second shell.

[0020] In some embodiments of the present utility model, the electric tool further comprises a connecting assembly, wherein the connecting assembly comprises:

[0021] A limiting member, wherein the limiting member has a limiting structure;

[0022] A screw connection member, the screw connection member passes through the limiting member and is screwed to the first housing;

[0023] The second shell can be movably arranged on the limiting member and is located between the limiting structure and the first shell. The elastic member is sleeved and fixed on the outer circumferential surface of the limiting member, and one end of the elastic member abuts against the first shell, and the other end of the elastic member abuts against the second shell.

[0024] In some embodiments of the present invention, the electric tool further comprises:

[0025] A first bearing is arranged on the first housing, and the first bearing is sleeved and fixed on the outer peripheral surface of the first part.

[0026] In some embodiments of the present invention, the first part is sleeved on the output shaft of the driving device, and the first part and the second part are loosely matched.

[0027] In some embodiments of the present invention, a receiving groove is provided on the first part, the receiving groove is a square groove, and the second part is inserted into the receiving groove.

[0028] In some embodiments of the present invention, the second portion includes a first section and a second section which are arranged in sequence, the axis of the first section is arranged parallel to the axis of the second section, the first section is connected to the accommodating groove, and the eccentric outer circle is arranged on the second section.

[0029] In some embodiments of the present invention, the second portion has a balancing structure, and the first section and the second section are respectively arranged on opposite sides of the balancing structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not to be considered as limiting the present invention. Moreover, the same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0031] Figure 1 It is a schematic structural diagram of the electric tool shown in the embodiment of the utility model at a first viewing angle;

[0032] Figure 2 It is a schematic structural diagram of the electric tool shown in the embodiment of the utility model at a second viewing angle;

[0033] Figure 3 It is an exploded schematic diagram of the electric tool shown in the embodiment of the utility model at a third viewing angle;

[0034] Figure 4 It is a partial schematic diagram of the internal structure of the electric tool shown in the embodiment of the utility model;

[0035] Figure 5 It is a schematic diagram of the partial structure of the eccentric assembly shown in the embodiment of the utility model at a first viewing angle;

[0036] Figure 6 It is a schematic diagram of the partial structure of the eccentric assembly shown in the embodiment of the utility model at a second viewing angle;

[0037] Figure 7 for Figure 2 Schematic diagram of the local section in the AA direction;

[0038] Figure 8 for Figure 2 Schematic diagram of the local section along the BB direction.

[0039] The symbols in the accompanying drawings are as follows:

[0040] 1000. Power tools;

[0041] 100, housing assembly; 200, driving device; 300, eccentric assembly; 400, working accessories;

[0042] 500, shift fork assembly; 501, shift fork;

[0043] 10. First housing; 11. Screw connection hole;

[0044] 20. A second housing;

[0045] 30. driving motor; 31. output shaft;

[0046] 40. first part; 41. main body; 42. receiving groove; 43. first bearing;

[0047] 50, the second part; 51, the first section; 511, the plug-in structure; 52, the second section; 53, the balance structure; 54, the action member; 55, the fixing member;

[0048] 60. Connecting assembly; 61. Screw-on member; 62. Position-limiting member; 63. Baffle;

[0049] 71. Vibration-damping member; 72. Elastic member;

[0050] 80. bearing assembly; 81. second bearing; 82. mounting member; 83. sealing member;

[0051] 90. Protective cover. DETAILED DESCRIPTION

[0052] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0053] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0054] Although the terms first, second, third, etc. can be used in the text to describe multiple 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 only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0055] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is turned over, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both above and below orientations.

[0056] The swing shovel, also known as a universal tool, is a reciprocating swing motor tool. The motor in the housing drives the blade connected to the output shaft 31 to make reciprocating motion. The swing shovel can achieve multiple functions such as cutting, grinding, scraping, roughing and polishing by replacing the blade installed on the head. It is convenient and practical. Cutting is an important function of the swing shovel and is frequently used in the fields of woodworking and construction.

[0057] At present, the existing swing shovel includes a housing, and a motor and a transmission assembly are arranged inside the housing. However, since the existing transmission assembly, the housing and the motor are rigidly fixed to each other, the vibration generated by the transmission assembly during operation will be transmitted to the operator through the housing, which eventually leads to the problem of large vibration of the power tool. At the same time, since the transmission assembly mostly adopts a cantilever eccentric structure, it is easy to cause the mechanical structure to have a short life and large vibration and other undesirable problems.

[0058] In order to solve the above problems, the present application proposes an electric tool 1000, which can at least solve the problem of large vibrations existing in the existing electric tool 1000 during use.

[0059] In terms of overall design, Figure 1-Figure 8 As shown, the electric tool 1000 includes a housing assembly 100, a driving device 200, an eccentric assembly 300, a vibration reduction assembly, a fork assembly 500 and a working accessory 400. The housing assembly 100 includes a first housing 10 and a second housing 20 connected to each other, the driving device 200 is arranged inside the first housing 10, the fork assembly 500 is arranged inside the second housing 20, and the working accessory 400 is arranged on the fork assembly 500.

[0060] Furthermore, the eccentric assembly 300 includes a first part 40 and a second part 50, wherein the first part 40 is rotatably disposed on the first shell 10 and is transmission-connected to the driving device 200, and the second part 50 is rotatably disposed on the second shell 20, the second part 50 is transmission-connected to the first part 40, and the second part 50 has an eccentric outer circle for driving, and the eccentric outer circle is transmission-connected to the fork assembly 500.

[0061] Furthermore, the first shell 10 is extended along the first direction and is formed with a gripping portion for the operator to hold, the second shell 20 is connected to one end of the first shell 10, the vibration reduction assembly is arranged between the first shell 10 and the second shell 20, and the vibration reduction assembly is respectively matched with the first shell 10 and the second shell 20.

[0062] The electric tool 1000 of the utility model can be divided into a power part and a working part by setting the eccentric assembly 300 as a matching structure of the first part 40 and the second part 50, and setting the first part 40 on the first housing 10, and the second part 50 on the second housing 20, wherein the power part includes the first housing 10 and the driving device 200, and the working part includes the second housing 20, the fork assembly 500 and the working attachment 400. The driving device 200 and the fork assembly 500 are connected by transmission through the eccentric assembly 300. Since the second part 50 is rigidly connected to the second shell 20, when the power tool 1000 is working, the second part 50 will rotate under the transmission of the first part 40, and cause the second shell 20 to vibrate and transmit it to the first shell 10. At this time, by providing a vibration reduction assembly between the first shell 10 and the second shell 20, the vibration effect of the first shell 10 can be reduced when the power tool 1000 is working, which helps to reduce the vibration of the operator's grip, thereby effectively reducing the damage to the human body caused by vibration of the power tool 1000, so as to improve the comfort of using the power tool 1000.

[0063] Specifically, if Figures 1 to 3 As shown, the housing assembly 100 includes a first housing 10, a second housing 20 and a protective cover 90. A battery pack is disposed at the first end of the first housing 10 to power the driving device 200 inside the first housing 10. A mounting end surface is disposed at the second end of the first housing 10, and the second housing 20 is fixed on the mounting end surface through a connecting assembly 60.

[0064] The connecting assembly 60 may be a screw connection 61. Preferably, the screw connection 61 is a screw or a bolt. The screw connection is used to connect and fix the first housing 10 and the second housing 20, which helps to ensure the structural strength of the power tool 1000. At this time, the protective cover 90 is arranged on the second housing 20 and is spaced apart from the first housing 10 to prevent the protective cover 90 from transmitting the vibration generated by the working part to the first housing 10.

[0065] It should be pointed out that the first housing 10 and the second housing 20 may be connected in other ways, such as snap connection, riveting or plug-in connection, so as to ensure that the electric tool 1000 can be used normally.

[0066] Furthermore, the electric tool 1000 further includes a first bearing 43 , which is disposed on the first housing 10 and sleeved and fixed on the outer circumferential surface of the first portion 40 .

[0067] Specifically, the first part 40 of the eccentric assembly 300 is installed inside the first shell 10 through the first bearing 43, so as to effectively ensure the rotation of the first part 40 on the first shell 10. At the same time, the first bearing 43 can support the first part 40, which helps to improve the structural stability of the first shell 10, improve the structural rigidity and life of the first shell 10, and also help to reduce the vibration of the first shell 10 when the drive device 200 is working.

[0068] In the embodiment of the present application, the driving device 200 is disposed inside the first housing 10, and preferably, the driving device 200 includes a driving motor 30. One end of the first part 40 is fixed to the output shaft 31 of the driving motor 30, and the other end of the first part 40 extends to the outside of the first housing 10 through the mounting end surface. The first bearing 43 is fixedly mounted inside the first housing 10, the first bearing 43 is located on the output side of the driving device 200, and is sleeved and fixed on the outer peripheral surface of the first part 40. Preferably, the first bearing 43 is a ball bearing.

[0069] Furthermore, the second portion 50 of the eccentric assembly 300 is disposed on the second housing 20 through the bearing assembly 80 , and at this time, the vibration reduction assembly includes a vibration reduction member 71 , which is sandwiched between the bearing assembly 80 and the first housing 10 .

[0070] Specifically, by providing a bearing assembly 80 to mount the second part 50 of the eccentric assembly 300 on the second shell 20, the rotation of the second part 50 on the second shell 20 can be effectively ensured. When the electric tool 1000 is working, the driving device 200 drives the first part 40 to rotate and drives the second part 50 to rotate, so that the bearing assembly 80 can vibrate. At this time, by providing a shock-absorbing member 71 between the bearing assembly 80 and the first shell 10, the vibration transmission from the bearing assembly 80 to the first shell 10 can be effectively reduced, thereby reducing the vibration effect of the gripping part of the first shell 10 and improving the comfort of using the electric tool 1000.

[0071] In the implementation mode of the present application, Figure 3 , Figure 7 and Figure 8 As shown, a protrusion structure is formed on the mounting end surface, and the protrusion structure is arranged around the first part 40 and at equal intervals. The above-mentioned vibration damping member 71 is a rubber member, and a plurality of insertion holes are opened on the vibration damping member 71. The insertion holes and the protrusion structures are arranged one by one to ensure that the vibration damping member 71 can be accurately installed on the mounting plate. When the first housing 10 is connected to the second housing 20, the vibration damping member 71 is sandwiched between the mounting end surface and the bearing assembly 80 to reduce the vibration transmitted from the bearing assembly 80 to the first housing 10.

[0072] It should be noted that the thickness of the rubber member is greater than the protrusion depth of the protrusion structure, so as to ensure that the vibration damping member 71 is sandwiched between the bearing assembly 80 and the mounting plate, and the bearing assembly 80 is spaced apart from the mounting plate. At the same time, the rubber member is sleeved on the radial outer side of the connection between the first part 40 and the second part 50, and is spaced apart from the first part 40 and the second part 50, so as to avoid the influence of the vibration damping member 71 on the transmission of the first part 40 and the second part 50.

[0073] Furthermore, the bearing assembly 80 includes a mounting member 82 and a second bearing 81 , wherein the mounting member 82 is sealedly connected to the second housing 20 , the second bearing 81 is embedded in the mounting member 82 , and the second bearing 81 is sleeved and fixed on the outer circumferential surface of the second portion 50 .

[0074] Specifically, by sealingly connecting the mounting member 82 to the second housing 20, the fixing effect of the bearing assembly 80 on the second housing 20 can be effectively guaranteed. The second bearing 81 is fixed on the mounting member 82 in an embedded manner, which helps to ensure the connection effect between the second bearing 81 and the mounting member 82. At the same time, the second bearing 81 is sleeved and fixed on the outer peripheral surface of the second part 50, which can effectively ensure that the second part 50 can rotate on the second housing 20. At the same time, the second bearing 81 can support the second part 50, which helps to improve the structural stability of the second housing 20 and improve the structural rigidity and life of the second housing 20.

[0075] In the embodiment of the present application, the bearing assembly 80 includes a mounting member 82, a sealing member 83 and a second bearing 81, wherein an annular groove is provided on the outer peripheral surface of the mounting member, and the sealing member 83 is a rubber member, which is accommodated in the annular groove and partially protrudes out of the annular groove. Due to the setting of the rubber member, the fixing effect of the mounting member 82 on the second housing 20 can be effectively guaranteed, and it helps to reduce the vibration transmitted from the second part 50 to the second housing 20. At the same time, the second bearing 81 is a ball bearing and is embedded in the mounting member 82, which can effectively ensure the fixing effect of the second bearing 81.

[0076] It should be noted that a side surface of the second bearing 81 and a side surface of the mounting member 82 are located in the same plane and are jointly in contact with a side surface of the vibration damping member 71 to minimize the vibration transmitted from the bearing assembly 80 to the second housing 20 .

[0077] Furthermore, the vibration reduction assembly further includes an elastic member 72 , and the elastic member 72 is sandwiched between the first shell 10 and the second shell 20 .

[0078] Specifically, by providing an elastic member 72 between the first housing 10 and the second housing 20, the vibration transmitted from the second housing 20 to the first housing 10 can be effectively reduced. At the same time, the vibration reduction member 71 provided between the bearing assembly 80 and the first housing 10 can further reduce the vibration transmitted from the working part to the driving part. The cooperation of the two can effectively reduce the damage to the human body caused by vibration, thereby greatly improving the comfort of use.

[0079] It is understood that the elastic member 72 can be set as a spring, and one end of the spring is connected to the first housing 10, and the other end of the spring is connected to the second housing 20. When the vibration of the second housing 20 is transmitted to the first housing 10 through the spring, the effect of the vibration is reduced by the structure of the spring itself, thereby reducing the vibration generated by the working part. The elastic member 72 can also be set as an elastic gasket to reduce the transmission of vibration between the first housing 10 and the second housing 20.

[0080] Furthermore, the connection assembly 60 includes a limiting member 62 and a screw-connecting member 61 . The limiting member 62 has a limiting structure, and the screw-connecting member 61 passes through the limiting member 62 and is screw-connected to the first housing 10 .

[0081] The second shell 20 can be movably arranged on the limiting member 62 and is located between the limiting structure and the first shell 10. The elastic member 72 is sleeved and fixed on the outer peripheral surface of the limiting member 62, and one end of the elastic member 72 abuts against the first shell 10, and the other end of the elastic member 72 abuts against the second shell 20.

[0082] Specifically, by setting the screw member 61 to fix the second housing 20 on the first housing 10, the connection effect between the first housing 10 and the second housing 20 can be effectively guaranteed, thereby ensuring the structural strength of the electric tool 1000. At the same time, by setting the limiter 62, and the second housing 20 can be movably set on the limiter 62, when the electric tool 1000 is working, the second housing 20 can have a tendency to move along the limiter 62. With the setting of the elastic member 72, the transmission of vibration between the first housing 10 and the second housing 20 can be further reduced. Moreover, the setting of the limiter structure can effectively prevent the second housing 20 from being separated from the limiter 62.

[0083] In the embodiment of the present application, the limiting member 62 includes a body and a limiting structure, wherein the body is cylindrical as a whole, and the screw member 61 passes through the limiting member 62 and is fixed in the screw hole 11 of the first shell 10. Preferably, the screw member 61 is a bolt or a screw. The first end of the body can pass through the second shell 20 and abut against the first shell 10, and the second end of the body is provided with a limiting structure, and at this time, the second shell 20 can slide along the axial direction of the body, and one end abuts against the mounting end surface, and the other end abuts against the limiting structure.

[0084] At this time, a mounting groove is provided on the second housing 20. When the screw member 61 passes through the stopper 62 and is screwed into the screw hole 11, the mounting groove is arranged concentrically with the body. The elastic member 72 is arranged as a spring. The elastic member 72 is sleeved and fixed on the outer peripheral surface of the body and at least partially accommodated in the mounting groove. When the first housing 10 is connected to the second housing 20, one end of the spring abuts against the first housing 10, and the other end of the elastic member 72 abuts against the second housing 20, thereby ensuring that it has a good vibration reduction effect.

[0085] It should be noted that the above-mentioned limiting structure and the body can be an integrally formed structure, wherein the limiting structure is a protrusion arranged at intervals along the circumference of the body, or a baffle 63 extending radially along the body. The limiting structure and the body can also be arranged separately, and in this case, the limiting structure is an annular baffle 63, and the outer diameter of the annular baffle 63 is larger than the outer diameter of the body, and larger than the maximum outer diameter of the screw connection 61.

[0086] In addition, in this embodiment, there are four connecting assemblies 60, which are arranged in a circular manner with the output shaft 31 of the driving motor 30 as the center. By providing multiple connecting assemblies 60, it is helpful to ensure the assembly effect of the power tool 1000 and the uniformity of vibration transmission.

[0087] Furthermore, the first part 40 and the second part 50 are clearance-fitted. Specifically, the connection between the first part 40 and the second part 50 by clearance-fitting helps to ensure that the driving force generated by the driving device 200 can be accurately transmitted to the second part 50 through the first part 40, thereby ensuring the working effect of the driving device 200 and the working effect of the electric tool 1000.

[0088] It should be understood that a fit with a gap (including a minimum gap equal to zero) is called a clearance fit. At this time, the tolerance zone of the hole is above the tolerance zone of the shaft. The role of the gap is to store lubricating oil, compensate for various errors, etc., and its size affects the relative movement of the hole and the shaft. By adopting a clearance fit, the first part 40 and the second part 50 can have a good fit state, thereby ensuring the transmission effect of the driving force.

[0089] It should be further understood that a receiving groove 42 is provided on the first part 40, and the receiving groove 42 is a square groove, and the second part 50 is inserted in the receiving groove 42. Specifically, the first part 40 has a main body 41, and the main body 41 is cylindrical as a whole. One end of the main body 41 is sleeved and fixed on the output shaft of the drive motor 30, and the other end is provided with a receiving groove 42. The receiving groove can be set to a straight line shape and is adaptively connected with the second part 50. It should be pointed out that the structure of the receiving groove 42 includes but is not limited to the above-mentioned square groove. At the same time, the receiving groove 42 can also be provided on the second part 50 to ensure that the first part 40 is adapted to be inserted in the receiving groove 42. The present application can further ensure the effective transmission of the driving force by inserting the second part 50 in the receiving groove 42.

[0090] Furthermore, the second portion 50 includes a first section 51 and a second section 52 which are sequentially arranged. The axis of the first section 51 is arranged parallel to the axis of the second section 52 , and the first section 51 is connected to the receiving groove 42 .

[0091] Specifically, the first section 51 is connected to the accommodating groove 42 so that the axis of the first section 51 is in the same straight line as the output shaft 31 of the driving device 200. At the same time, the axis of the second section 52 is set to be parallel to the axis of the first section 51, so that the second part 50 can achieve the effect of eccentric rotation. At this time, the eccentric outer circle on the second section 52 can effectively transmit the driving force to the working accessory 400 by abutting against the two shifting feet of the shift fork 501, and enable the working accessory 400 to perform reciprocating motion.

[0092] In the embodiment of the present application, an insertion structure 511 adapted to the receiving groove 42 is formed at one end of the first section 51 close to the second portion 50. At the same time, a second section 52 is provided at the other end of the first section 51, and the distance between the axis of the second section 52 and the axis of the first section 51 is L, wherein 0.1 mm ≤ L ≤ 3 mm. By limiting the distance between the axis of the second section 52 and the axis of the first section 51, the working distance of the eccentric outer circle can be effectively guaranteed, thereby ensuring the feasibility of the reciprocating motion of the working attachment 400.

[0093] Furthermore, the second part 50 has a balancing structure 53, and the first section 51 and the second section 52 are respectively arranged on opposite sides of the balancing structure 53. The balancing structure 53 is provided to further reduce the vibration effect when the second part 50 rotates, thereby helping to reduce the vibration when the driving device 200 outputs, and reducing the influence of the external environment on the output of the motor 30.

[0094] In this embodiment, along the axial direction of the driving device 200, the second part 50 is sequentially provided with a first section 51, a balancing structure 53, a second section 52 and a third section. Among them, the first section 51 is connected to the first section 40, and the balancing structure 53 is used to ensure the rotation effect of the second section 50. An action member 54 is provided on the second section 52, and the action member 54 is sleeved and fixed on the second section 52, and the outer peripheral surface of the action member 54 is the above-mentioned eccentric outer circle. Since the action member 54 is detachably provided on the second section 52 to form the required eccentric outer circle, at this time, a fixing member 55 is provided on the third section to ensure the installation and fixation of the eccentric member. The fixing member 55 and the third section can be fixedly installed by screw connection or interference fit.

[0095] It should be pointed out that the formation of the desired eccentric outer circle by the cooperation of the action member 54 and the second section 52 helps to ensure the installation efficiency of the eccentric assembly 300, thereby ensuring the assembly efficiency of the electrician's tool.

[0096] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An electric tool, characterized in that: The electric tool comprises: A housing assembly, the housing assembly comprising a first housing and a second housing connected to each other; A driving device, the driving device is arranged inside the first housing; An eccentric assembly, the eccentric assembly comprising a first part and a second part, the first part being rotatably disposed on the first housing and being transmission-connected to the driving device, the second part being rotatably disposed on the second housing, the second part being transmission-connected to the first part, and the second part having an eccentric outer circle for driving; A vibration reduction assembly, the vibration reduction assembly is disposed between the first shell and the second shell, and the vibration reduction assembly is matched with the first shell and the second shell respectively; A working accessory is connected to the eccentric outer circle through a fork assembly.

2. The electric tool according to claim 1, characterized in that: The second part is arranged on the second housing through a bearing assembly; the vibration reduction assembly comprises: A vibration damping member is sandwiched between the bearing assembly and the first housing.

3. The electric tool according to claim 2, characterized in that: The bearing assembly comprises: a mounting member, the mounting member being sealed and connected to the second housing; The second bearing is embedded in the mounting member and is sleeved and fixed on the outer peripheral surface of the second part.

4. The electric tool according to claim 1, characterized in that: The vibration reduction assembly comprises: An elastic member is sandwiched between the first shell and the second shell.

5. The electric tool according to claim 4, characterized in that: The electric tool further comprises a connecting assembly, wherein the connecting assembly comprises: A limiting member, wherein the limiting member has a limiting structure; A screw connection member, the screw connection member passes through the limiting member and is screwed to the first housing; The second shell can be movably arranged on the limiting member and is located between the limiting structure and the first shell. The elastic member is sleeved and fixed on the outer circumferential surface of the limiting member, and one end of the elastic member abuts against the first shell, and the other end of the elastic member abuts against the second shell.

6. The electric tool according to claim 1, characterized in that: The electric tool further comprises: A first bearing is arranged on the first housing, and the first bearing is sleeved and fixed on the outer peripheral surface of the first part.

7. The electric tool according to any one of claims 1 to 6, characterized in that: The first part is sleeved on the output shaft of the driving device, and the first part is loosely matched with the second part.

8. The electric tool according to claim 7, characterized in that: The first part is provided with a receiving groove, the receiving groove is a square groove, and the second part is inserted in the receiving groove.

9. The electric tool according to claim 8, characterized in that: The second portion includes a first section and a second section which are sequentially arranged, the axis of the first section is arranged parallel to the axis of the second section, the first section is connected to the receiving groove, and the eccentric outer circle is arranged on the second section.

10. The electric tool according to claim 9, characterized in that: The second portion has a balanced structure, and the first section and the second section are respectively disposed on opposite sides of the balanced structure.

Images