Electric scissors
By using an integrated drive shaft and bearing retainer design, the problem of unstable transmission mechanism in electric scissors is solved, achieving more efficient mechanical energy transmission and shearing efficiency, and reducing energy loss and failure risk.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-16
- Publication Date
- 2026-04-10
AI Technical Summary
The transmission mechanism of existing electric scissors is unstable when transmitting the mechanical energy of the motor to the cutter, resulting in large energy loss and affecting cutting efficiency.
It adopts an integrated drive shaft structure, including an eccentric shaft section and a concentric shaft section, combined with bearing and snap ring design, reducing intermediate connecting parts and improving transmission stability and efficiency.
It reduces energy loss, improves shearing efficiency and the service life of the drive shaft, reduces the risk of failure, and saves on parts and processing costs.
Smart Images
Figure CN224098291U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of scissors, in particular to an electric scissors. BACKGROUND
[0002] The electric scissors is a kind of handheld electric tool, which is widely used in the fields of gardens, orchards, tea gardens and clothing, etc. In the field of gardens, the electric scissors is mainly used for pruning branches, shrubs, etc. In the orchard, the electric scissors can help the fruit farmers to easily cut off the branches of fruit trees. In the tea garden, the electric scissors can be used for pruning tea trees. In the field of clothing, the electric scissors can be used for cutting cloth, etc. In other fields, the electric scissors can also be used for cutting iron sheets, color steel tiles, steel wire meshes, etc.
[0003] The electric scissors takes the motor as the power source, and the mechanical energy output by the motor is transmitted to the cutting knife through the transmission mechanism, so as to drive the cutting knife to perform the shearing work.
[0004] However, the transmission mechanism in the related art is not stable when transmitting the mechanical energy of the motor to the cutting knife, and there is a large energy loss, which affects the shearing efficiency. CONTENT OF THE INVENTION
[0005] The present application provides an electric scissors, which can improve the stability of the transmission mechanism when transmitting the mechanical energy of the motor to the cutting knife, reduce the energy loss, and facilitate to improve the shearing efficiency of the electric scissors. Moreover, the first shaft segment is set as an eccentric shaft, which can save the number of parts used and the cost.
[0006] In a first aspect, the present application provides an electric scissors, which comprises a housing, a fixed knife, a movable knife and a transmission shaft. The fixed knife is fixedly installed on the housing. The movable knife is rotationally connected with the fixed knife. The transmission shaft is of an integrated structure, and comprises a first shaft segment and a second shaft segment connected with each other. The first shaft segment is closer to the movable knife than the second shaft segment. The first shaft segment is an eccentric shaft. When the second shaft segment is driven to rotate the first shaft segment, the first shaft segment can push the movable knife, so that the movable knife reciprocates relative to the fixed knife.
[0007] By setting the transmission shaft as an integrated structure comprising the first shaft segment and the second shaft segment connected with each other, the intermediate connecting piece such as a shaft coupling is not required between the first shaft segment and the second shaft segment. The energy loss is small, the noise is low, the mechanical energy transmission is stable and the efficiency is high, which facilitates to improve the shearing efficiency of the electric scissors. Moreover, the integrated transmission shaft has high overall structural rigidity, which can reduce the elastic deformation of the transmission shaft during the mechanical energy transmission, facilitate to provide a rigid transmission path, and improve the efficiency of the mechanical energy transmission and the shearing efficiency of the electric scissors. In addition, compared with the transmission shaft connected in a split type, the risk of failure at the connection point can be avoided, the service life of the transmission shaft is improved, and the risk of stopping motion and other faults of the electric scissors during use is reduced.
[0008] The first shaft segment is arranged as an eccentric shaft. The eccentric shaft pushes the cutter to realize the reciprocating swing of the cutter. In this way, the reciprocating swing of the cutter can be realized without additional non-standard parts such as eccentric bearings, thereby saving the number of parts and improving the assembly efficiency of the electric scissors. Moreover, the first shaft segment of the transmission shaft is arranged as an eccentric shaft, which can be integrally formed by die casting and lathe processing. Therefore, the cam rotation provided by the eccentric shaft to make the cutter reciprocate can also reduce the processing difficulty and save the cost.
[0009] In a possible design, the electric scissors further include a first bearing, which is sleeved on the first shaft segment. When the first shaft segment rotates, the first bearing pushes the cutter to reciprocate.
[0010] Through the above scheme, the first bearing can push the cutter instead of the first shaft segment, thereby reducing the possibility that the first shaft segment and the cutter directly abut against each other and are worn during rotation. Moreover, the material of the first shaft segment can be relatively thin, and the forming process of the first shaft segment is also reduced, thereby reducing the processing difficulty and the processing cost. In addition, the first bearing can also reduce the mechanical load friction coefficient of the transmission shaft during rotation, reduce the energy loss, and improve the transmission efficiency of the mechanical energy of the transmission shaft.
[0011] In a possible design, the first bearing is a general bearing. Alternatively, the first bearing is an eccentric bearing.
[0012] Through the above scheme, since the general bearing is simple to process and has a low cost, the general bearing can be sleeved on the first shaft segment without increasing the manufacturing cost of the electric scissors, and the effects of reducing the wear of the first shaft segment and the cutter, reducing the forming process requirement of the first shaft segment, and reducing the energy loss can be achieved.
[0013] On the basis that the first shaft segment is an eccentric shaft, the eccentric bearing is further sleeved on the first shaft segment, which can further increase the shearing stroke of the electric scissors, facilitate the acceleration of the shearing speed, and improve the shearing efficiency.
[0014] In a possible design, the second shaft segment includes a first sub-shaft and a second sub-shaft. One end of the first sub-shaft away from the second sub-shaft is connected with the first shaft segment, and the other end of the first sub-shaft close to the second sub-shaft is connected with the second sub-shaft. The cross-sectional dimension of the first sub-shaft is greater than the cross-sectional dimension of the first shaft segment, and the cross-sectional dimension of the first sub-shaft is less than the cross-sectional dimension of the second sub-shaft.
[0015] According to the scheme, the thickness of the transmission shaft decreases in the order of the second sub-shaft, the first sub-shaft, and the first shaft segment, which is convenient for adapting to the shape in the existing shell, improves the utilization rate of the existing shell without improving the structure of the shell, and improves the rotation stability of the transmission shaft.
[0016] In a possible design, the first sub-shaft is an eccentric shaft. Alternatively, the first sub-shaft is a concentric shaft.
[0017] According to the scheme, when the first sub-shaft is a concentric shaft, the first sub-shaft can provide a support point for the support of the transmission shaft in the shell, thereby improving the stability of the transmission shaft during rotation.
[0018] When the first sub-shaft is also an eccentric shaft based on the first shaft segment being an eccentric shaft, the eccentricity of the first shaft segment can be increased. In this way, the amplitude of the cam motion of the first shaft segment can be increased, and the amplitude of the swing of the moving knife relative to the fixed knife can be increased, thereby facilitating further increase of the shearing stroke of the electric shear, accelerating the shearing speed, and improving the shearing efficiency.
[0019] In a possible design, the electric shear further includes a second bearing, and the second bearing is sleeved on the first sub-shaft. When the first sub-shaft rotates, the second bearing contacts the shell.
[0020] According to the scheme, the second bearing is sleeved on the first sub-shaft, which can replace the first sub-shaft to contact the shell, thereby reducing the possibility of direct contact between the first sub-shaft and the shell and wear of the first sub-shaft and the shell during rotation. In addition, the first sub-shaft can not be too thick, which reduces the requirements for the forming process of the first sub-shaft, reduces the processing difficulty and processing cost. In addition, the setting of the second bearing can also reduce the mechanical load friction coefficient of the transmission shaft during rotation, reduce energy loss, and improve the efficiency of the transmission shaft in transmitting mechanical energy.
[0021] In a possible design, when the first sub-shaft is an eccentric shaft, the second shaft segment further includes a third sub-shaft, one end of the third sub-shaft is connected with the first sub-shaft, the other end of the third sub-shaft is connected with the second sub-shaft, and the third sub-shaft is a concentric shaft.
[0022] According to the scheme, the third sub-shaft can provide a support point for the support of the transmission shaft in the shell, thereby ensuring that the first sub-shaft can better increase the shearing stroke of the electric shear and improving the stability of the transmission shaft during rotation.
[0023] In a possible design, the electric shear further includes a third bearing, and the third bearing is sleeved on the third sub-shaft. When the third sub-shaft rotates, the third bearing contacts the shell.
[0024] By the above scheme, the third bearing sleeve is arranged on the third sub-shaft, which can replace the third sub-shaft to contact the shell, so that the direct contact between the third sub-shaft and the shell is reduced, and the possibility of wear between the third sub-shaft and the shell during rotation is reduced. Moreover, the third sub-shaft can be relatively thin, and the requirement for the forming process of the third sub-shaft is reduced, so that the processing difficulty and cost are reduced. In addition, the arrangement of the third bearing can also reduce the mechanical load friction coefficient of the transmission shaft during rotation, reduce energy loss, and improve the transmission efficiency of the mechanical energy of the transmission shaft.
[0025] In a possible design, the electric scissors further include a first snap spring. The side wall of the first shaft segment is provided with a first retainer groove at a position away from the second shaft segment, and the first snap spring is installed in the first retainer groove and abuts against a side of the first bearing away from the second shaft segment.
[0026] By the above scheme, the first snap spring is installed in the first retainer groove, and the groove wall of the first retainer groove can limit the movement of the first snap spring along the axis direction of the first shaft segment. The first snap spring also abuts against the side of the first bearing away from the second shaft segment, so that the first snap spring can limit the movement of the first bearing along the axis direction of the first shaft segment, and prevent the first bearing from falling off the first shaft segment.
[0027] In a possible design, the electric scissors further include a second snap spring. The side wall of the first sub-shaft is provided with a second retainer groove at a position away from the second sub-shaft, and the second snap spring is installed in the second retainer groove and abuts against a side of the second bearing away from the second sub-shaft. And / or, the electric scissors further include a third snap spring. The side wall of the third sub-shaft is provided with a third retainer groove at a position away from the second sub-shaft, and the third snap spring is installed in the third retainer groove and abuts against a side of the third bearing away from the second sub-shaft.
[0028] By the above scheme, the second snap spring is installed in the second retainer groove, and the groove wall of the second retainer groove can limit the movement of the second snap spring along the axis direction of the first sub-shaft. The second snap spring also abuts against the side of the second bearing away from the second sub-shaft, so that the second snap spring can limit the movement of the second bearing along the axis direction of the first sub-shaft, and prevent the second bearing from falling off the first sub-shaft.
[0029] The third snap spring is installed in the third retainer groove, and the groove wall of the third retainer groove can limit the movement of the third snap spring along the axis direction of the third sub-shaft. The third snap spring also abuts against the side of the third bearing away from the second sub-shaft, so that the third snap spring can limit the movement of the third bearing along the axis direction of the third sub-shaft, and prevent the third bearing from falling off the third sub-shaft. BRIEF DESCRIPTION OF DRAWINGS
[0030] Figure 1Fig. 1 is a schematic diagram of an overall structure of an electric scissors in one perspective view according to an embodiment of the present application.
[0031] Figure 2 Fig. 2 is a schematic diagram of an overall structure of an electric scissors in another perspective view according to an embodiment of the present application.
[0032] Figure 3 Fig. 3 is a schematic diagram of a structure of a transmission shaft according to an embodiment of the present application. Figure 2 Fig. 4 is a sectional view along the section A-A.
[0033] Figure 4 Fig. 5 is a schematic diagram of a structure of a transmission shaft according to another embodiment of the present application.
[0034] Legend of reference signs:
[0035] 100, housing;
[0036] 200, fixed blade;
[0037] 300, movable blade;
[0038] 400, transmission shaft; 410, first shaft segment; 411, first stop ring groove; 420, second shaft segment; 421, first sub-shaft; 4211, second stop ring groove; 422, second sub-shaft;
[0039] 500, first bearing;
[0040] 600, second bearing. DETAILED DESCRIPTION
[0041] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the specification of the present application is only for the purpose of describing specific embodiments, and is not intended to limit the present application; the terms "comprise" and "have" and any variations thereof in the specification and claims of the present application and the description of the drawings are intended to cover non-exclusive inclusion.
[0043] Reference to "an embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. Those of ordinary skill in the art will realize and understand, upon reading this description, that the embodiments described herein are illustrative of the application and are not intended to be limiting.
[0044] The term "and / or", merely describes association relationship of associated objects, and means that three relationships can exist, for example, A and / or B can mean that A exists, A and B exist, and B exists. In addition, the character " / " herein generally means that the front and rear associated objects are in an "or" relationship.
[0045] The orientation words appearing in the following description are the directions shown in the drawings, and are not limited to the specific structure of the application. For example, in the description of the application, the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.
[0046] In addition, the terms "first", "second", and the like in the specification and claims of the application or the above drawings are used to distinguish different objects, and are not used to describe a specific order, and can explicitly or implicitly include one or more of the features.
[0047] In the description of the application, unless otherwise specified, the meaning of "a plurality of" is two or more (including two), and similarly, "a plurality of groups" means two or more groups (including two groups).
[0048] In the description of the application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", and "connection" should be understood broadly, for example, the "connection" or "connection" of mechanical structures can mean physical connection, for example, the physical connection can be fixed connection, for example, fixed connection through a spacer, for example, fixed connection through screws, bolts or other spacers; the physical connection can also be detachable connection, for example, mutual clamping or clamping connection; the physical connection can also be integrally connected, for example, welding, bonding or integrally formed connection. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.
[0049] The electric scissors are a kind of hand-held electric tools, mainly taking the motor as the power source. The motor can be an electric motor or a pneumatic motor. When the motor is an electric motor, the motor can convert the electric energy into mechanical energy after being electrified. When the motor is a pneumatic motor, the motor can convert the pressure energy of compressed air into mechanical energy.
[0050] The electric scissors comprise the motor, a transmission mechanism and a cutting knife in addition. The transmission mechanism comprises a gear set and a transmission shaft, and the cutting knife comprises a moving knife and a fixed knife. The gear set is connected with the output shaft of the motor, one end of the transmission shaft is matched with the gear set, and the other end of the transmission shaft is matched with the moving knife.
[0051] The motor generates mechanical energy when working, which is transmitted to the transmission shaft through the gear set, so that the transmission shaft can rotate.
[0052] During some periods in the rotation process of the transmission shaft, the first part of the moving knife can be pushed, so that the moving knife rotates relative to the fixed knife to make the blade opening of the electric scissors open. At this time, the materials to be cut such as branches, cloth or iron sheet can be accommodated in the blade opening.
[0053] During other periods in the rotation process of the transmission shaft, the second part of the moving knife can be pushed, so that the moving knife rotates relative to the fixed knife to make the blade opening of the electric scissors close. At this time, the materials to be cut can be cut off by the occlusion of the moving knife and the fixed knife.
[0054] The motor continuously generates mechanical energy, so that the transmission shaft continuously rotates, and the electric scissors switch between the blade opening and the blade closing, so that the electric scissors can realize the shearing of the materials to be cut while moving. The part of the moving knife and the fixed knife responsible for completing the shearing action is called the blade opening of the electric scissors.
[0055] In order for those skilled in the art to better understand the scheme of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the drawings.
[0056] Figure 1 is the overall structure schematic diagram of the electric scissors in one view provided by the embodiments of the present application, as shown in Figure 1 The electric scissors comprise a shell 100, a fixed knife 200 and a moving knife 300. The fixed knife 200 is fixedly installed on the shell 100. The moving knife 300 is rotationally connected with the fixed knife 200.
[0057] Figure 2 is the overall structure schematic diagram of the electric scissors in another view provided by the embodiments of the present application, Figure 3 is Figure 2 is the sectional view along the A-A section, Figure 4 is the structure schematic diagram of a transmission shaft provided by the embodiments of the present application, as shown in Figures 1 to 4As shown, the electric scissors further comprise a transmission shaft 400. The transmission shaft 400 is of an integrated structure, and the transmission shaft 400 comprises a first shaft segment 410 and a second shaft segment 420 connected with each other, the first shaft segment 410 is closer to the moving blade 300 than the second shaft segment 420, the first shaft segment 410 is an eccentric shaft, and when the second shaft segment 420 is driven to rotate, the first shaft segment 410 can push the moving blade 300 to make the moving blade 300 reciprocate relative to the fixed blade 200.
[0058] The fixed blade 200 comprises a first connecting portion and a first cutting portion connected with each other, and the moving blade 300 comprises a second connecting portion and a second cutting portion connected with each other. The first connecting portion and the first cutting portion can be integrally formed to save assembly procedures. Alternatively, the first connecting portion and the first cutting portion can be separately formed and then connected in a detachable manner by screws, clamping or the like, so that when the first cutting portion is damaged, the first cutting portion can be individually disassembled and replaced to save maintenance costs. Similarly, the second connecting portion and the second cutting portion can be integrally formed or separately formed and then connected in a detachable manner.
[0059] The housing 100 has a receiving cavity, and the first connecting portion, the second connecting portion, the transmission shaft 400 and the aforementioned motor are located in the housing 100, and the housing 100 can protect the structural members located in the receiving cavity. The first cutting portion and the second cutting portion are exposed outside the housing 100, so that the cooperation of the first cutting portion and the second cutting portion can shear the material to be sheared.
[0060] The first connecting portion and the second connecting portion can be hingedly fixed by a hinge shaft, or the rotating connection of the moving blade 300 and the fixed blade 200 can be realized by the cooperation of screws and nuts. The first connecting portion can be fixed on the housing 100 by screws or rivets to realize the fixed installation of the fixed blade 200 on the housing 100.
[0061] The transmission shaft 400 is arranged between the aforementioned gear set and the moving blade 300. Specifically, the transmission shaft 400 can comprise the first shaft segment 410 and the second shaft segment 420, one end of the first shaft segment 410 away from the second shaft segment 420 is used to cooperate with the moving blade 300, and the other end of the second shaft segment 420 away from the first shaft segment 410 is connected with the aforementioned gear set. The mechanical energy at the gear set can be first transmitted to the second shaft segment 420, so that the second shaft segment 420 is driven to rotate. Then the second shaft segment 420 transmits the mechanical energy to the first shaft segment 410, so that the first shaft segment 410 does cam motion and pushes the moving blade 300, so that the moving blade 300 reciprocates relative to the fixed blade 200.
[0062] The first shaft segment 410 and the second shaft segment 420 are integrally formed in the application. The second shaft segment 420 away from the moving knife 300 can be a concentric shaft, and the first shaft segment 410 close to the moving knife 300 can be an eccentric shaft. In this way, the second shaft segment 420 can provide a fulcrum for the support of the transmission shaft 400 in the shell 100, improving the stability of the transmission shaft 400 when rotating. In addition, the first shaft segment 410 can provide the required direction of power for the swing of the moving knife 300.
[0063] In specific implementation, the outer circle of the second shaft segment 420 coincides with the axis of the outer circle, and the second shaft segment 420 can have at least two parts in abutment with the shell 100 to stably support the transmission shaft 400. The outer circle of the first shaft segment 410 is parallel to but not coincident with the axis of the outer circle, and the first shaft segment 410 performs cam motion when rotating. The end of the second connecting part away from the second cutting part includes opposite first and second parts, which can be flat or curved.
[0064] In the initial state, the cutting edge of the electric scissors is closed. During some period of time when the transmission shaft 400 is driven to rotate, the first shaft segment 410 pushes the first part of the moving knife 300, so that the moving knife 300 swings relative to the fixed knife 200 to open the cutting edge of the electric scissors. During another period of time when the transmission shaft 400 is driven to rotate, the first shaft segment 410 switches to push the second part of the moving knife 300, so that the moving knife 300 swings relative to the fixed knife 200 to close the cutting edge of the electric scissors. During still another period of time when the transmission shaft 400 is driven to rotate, the first shaft segment 410 again switches to push the first part of the moving knife 300, so that the cutting edge of the electric scissors is opened. This goes on and on, so that the electric scissors switches between the open cutting edge and the closed cutting edge, realizing the shearing of the electric scissors while moving.
[0065] The aforementioned some period of time, another period of time and still another period of time can be 1 second, 2 seconds, 3 seconds, etc., which are not limited in the application.
[0066] In the embodiment of the application, the transmission shaft 400 is of an integral structure, including the first shaft segment 410 and the second shaft segment 420 connected with each other. In this way, the first shaft segment 410 and the second shaft segment 420 do not need to be connected by an intermediate connecting member such as a coupling, the energy loss is small, the noise is low, the mechanical energy transmission is stable and the efficiency is high, which is convenient for improving the shearing efficiency of the electric scissors. Moreover, the integral transmission shaft 400 has high overall structural rigidity, which can reduce the elastic deformation of the transmission shaft 400 in the process of mechanical energy transmission, facilitate the provision of a rigid transmission path, and improve the efficiency of mechanical energy transmission and the shearing efficiency of the electric scissors. In addition, compared with the transmission shaft 400 connected in a split structure, the risk of failure of the connection point can be avoided, the service life of the transmission shaft 400 can be improved, and the risk of failure of the electric scissors during use, such as stopping moving, can be reduced.
[0067] The first shaft segment 410 is arranged as an eccentric shaft, and the eccentric shaft pushes the cutter 300, so that the cutter 300 reciprocates. In this way, the reciprocation of the cutter 300 can be achieved without using non-standard parts such as an eccentric bearing, thereby saving the number of parts and facilitating the assembly efficiency of the electric shear.
[0068] Please continue to refer to Figures 2 to 4 The electric shear can further include a first bearing 500 sleeved on the first shaft segment 410. When the first shaft segment 410 rotates, the first bearing 500 pushes the cutter 300 to reciprocate.
[0069] The first bearing 500 sleeved on the first shaft segment 410 can replace the first shaft segment 410 to push the cutter 300, thereby reducing the possibility that the first shaft segment 410 and the cutter 300 directly abut against each other and are worn during rotation. In addition, the material of the first shaft segment 410 can be relatively thin, and the forming process of the first shaft segment 410 is relatively simple, thereby reducing the machining difficulty and cost. In addition, the first bearing 500 can also reduce the mechanical load friction coefficient of the transmission shaft 400 during rotation, reduce energy loss, and improve the transmission efficiency of the transmission shaft 400.
[0070] In some examples, the first bearing 500 can be a general bearing.
[0071] Since the first shaft segment 410 is an eccentric shaft, the cutter 300 can reciprocate, and the first bearing 500 sleeved on the first shaft segment 410 can be a general bearing. The outer ring of the general bearing pushes the cutter 300 to reciprocate when the first shaft segment 410 rotates. Since the general bearing is simple to process and has a low cost, the general bearing sleeved on the first shaft segment 410 can achieve the effects of reducing the wear of the first shaft segment 410 and the cutter 300, reducing the forming process requirements of the first shaft segment 410, and reducing energy loss, without increasing the manufacturing cost of the electric shear.
[0072] In other examples, the first bearing 500 can be an eccentric bearing.
[0073] On the basis of the first shaft segment 410 being an eccentric shaft, the eccentric bearing sleeved on the first shaft segment 410 can further increase the shearing stroke of the electric shear, facilitate the acceleration of the shearing speed, and improve the shearing efficiency.
[0074] Further, in the case that the first shaft segment 410 is sleeved with the first bearing 500, the electric scissors can further comprise a first circlip. As shown in Figure 3 and Figure 4 a portion of the side wall of the first shaft segment 410 away from the second shaft segment 420 is provided with a first retainer groove 411, and the first circlip is installed in the first retainer groove 411 and abuts against a side of the first bearing 500 away from the second shaft segment 420.
[0075] The first retainer groove 411 can be an annular groove. The first circlip is installed in the first retainer groove 411, and the groove wall of the first retainer groove 411 can limit the movement of the first circlip along the axial direction of the first shaft segment 410. The first circlip also abuts against the side of the first bearing 500 away from the second shaft segment 420, so that the first circlip can limit the movement of the first bearing 500 along the axial direction of the first shaft segment 410, avoiding the first bearing 500 from falling off the first shaft segment 410.
[0076] Please continue to refer to Figure 4 As shown in Figure 4 In some embodiments, the second shaft segment 420 can comprise a first sub-shaft 421 and a second sub-shaft 422, one end of the first sub-shaft 421 away from the second sub-shaft 422 is connected with the first shaft segment 410, and the other end of the first sub-shaft 421 close to the second sub-shaft 422 is connected with the second sub-shaft 422. That is, the first sub-shaft 421 is connected between the second sub-shaft 422 and the first shaft segment 410.
[0077] The cross-sectional dimension of the first sub-shaft 421 is greater than the cross-sectional dimension of the first shaft segment 410, and the cross-sectional dimension of the first sub-shaft 421 is less than the cross-sectional dimension of the second sub-shaft 422. The cross-section of the first sub-shaft 421, the cross-section of the first shaft segment 410 and the cross-section of the second sub-shaft 422 can all be the cross-section perpendicular to the axial direction of the first shaft segment 410.
[0078] In this way, the thickness of the transmission shaft 400 decreases in the order from the second sub-shaft 422 to the first sub-shaft 421 and then to the first shaft segment 410, which is convenient for adapting to the shape inside the existing shell 100, without improving the structure of the shell 100 in the case of improving the transmission shaft 400, improving the utilization rate of the existing shell 100. Moreover, in the case that the transmission shaft 400 can adapt to the shape inside the shell 100, the possibility of swinging of the transmission shaft 400 in the rotating process can be reduced, which is convenient for improving the rotating stability of the transmission shaft 400.
[0079] Based on the above structure of the second shaft segment 420, in some examples, the first sub-shaft 421 can be a concentric shaft. In this way, the first sub-shaft 421 can provide a support point for the support of the transmission shaft 400 in the housing 100, improving the stability of the transmission shaft 400 when rotating.
[0080] In other examples, the first sub-shaft 421 can be an eccentric shaft.
[0081] The first shaft segment 410 for pushing the moving knife 300 is connected to the first sub-shaft 421. Based on the eccentric shaft of the first shaft segment 410, the first sub-shaft 421 is also provided as an eccentric shaft, which is equivalent to increasing the eccentricity of the first shaft segment 410. In this way, the amplitude of the cam motion of the first shaft segment 410 can be increased, and in turn the amplitude of the oscillation of the moving knife 300 relative to the fixed knife 200 can be increased, which facilitates further increasing the shearing stroke of the electric shear, speeds up the shearing speed, and improves the shearing efficiency.
[0082] Please continue to refer to Figure 3 and Figure 4 As shown in Figure 3 and Figure 4 , the electric shear can also include a second bearing 600, which is sleeved on the first sub-shaft 421. When the first sub-shaft 421 rotates, the second bearing 600 is in contact with the housing 100.
[0083] The second bearing 600 is sleeved on the first sub-shaft 421, which can replace the first sub-shaft 421 to contact the housing 100, reducing the possibility of direct contact between the first sub-shaft 421 and the housing 100 and causing wear of the first sub-shaft 421 and the housing 100 during rotation. Moreover, the first sub-shaft 421 can not be set too thick, which reduces the requirements for the forming process of the first sub-shaft 421, reduces the processing difficulty and processing cost. In addition, the setting of the second bearing 600 can also reduce the mechanical load friction coefficient of the transmission shaft 400 during rotation, reduce energy loss, and improve the efficiency of the transmission of mechanical energy of the transmission shaft 400.
[0084] It should be noted that the number of second bearings 600 sleeved on the first sub-shaft 421 can be one or more. When the number of second bearings 600 is more than one, the plurality of second bearings 600 are in contact with the housing 100 when the first sub-shaft 421 rotates, which can eliminate more radial forces during rotation, improve the stability of the transmission shaft 400 during rotation, and also prevent the damage of one of the second bearings 600 from affecting the normal use of the electric shear.
[0085] In the case where the second bearing 600 is sleeved on the first sub-shaft 421, the electric shear can also include a second snap spring. As shown in Figure 3 and Figure 4As shown, the side wall of the first sub-shaft 421 is provided with a second blocking ring groove 4211 away from the second sub-shaft 422, and the second circlip is installed in the second blocking ring groove 4211 and abuts against the side of the second bearing 600 away from the second sub-shaft 422.
[0086] The second blocking ring groove 4211 can be an annular groove. The second circlip is installed in the second blocking ring groove 4211, and the groove wall of the second blocking ring groove 4211 can limit the movement of the second circlip along the axis direction of the first sub-shaft 421. The second circlip also abuts against the side of the second bearing 600 away from the second sub-shaft 422, so that the second circlip can limit the movement of the second bearing 600 along the axis direction of the first sub-shaft 421, and prevent the second bearing 600 from falling off the first sub-shaft 421. In addition, the setting of the second circlip can prevent the transmission shaft 400 from moving as a whole inside the housing 100.
[0087] Further, in the case of the first sub-shaft 421 being an eccentric shaft, the second shaft section 420 can further include a third sub-shaft, one end of the third sub-shaft being connected to the first sub-shaft 421, and the other end of the third sub-shaft being connected to the second sub-shaft 422. That is, the third sub-shaft is connected between the first sub-shaft 421 and the second sub-shaft 422.
[0088] Among them, the third sub-shaft is a concentric shaft.
[0089] In the case of the first sub-shaft 421 being an eccentric shaft, the third sub-shaft is set as a concentric shaft, so that the third sub-shaft can provide a support point for the support of the transmission shaft 400 inside the housing 100, and ensure that the first sub-shaft 421 can better play the role of increasing the shearing stroke of the electric scissors, and improve the stability of the transmission shaft 400 during rotation.
[0090] Further, in the case of the second shaft section 420 further including a third sub-shaft, the electric scissors can further include a third bearing, which is not shown in the figure. The third bearing is sleeved on the third sub-shaft. When the third sub-shaft rotates, the third bearing contacts the housing 100.
[0091] The third bearing is sleeved on the third sub-shaft, which can replace the third sub-shaft to contact the housing 100, reducing the possibility of the third sub-shaft and the housing 100 being worn during rotation due to direct contact. In addition, the third sub-shaft can not be set too thick, which reduces the requirements for the forming process of the third sub-shaft, and reduces the processing difficulty and processing cost. In addition, the setting of the third bearing can also reduce the mechanical load friction coefficient of the transmission shaft 400 during rotation, reduce energy loss, and improve the transmission efficiency of the mechanical energy of the transmission shaft 400.
[0092] In the case that the third bearing is sleeved on the third shaft, the electric scissors can further comprise a third circlip, not shown in the figure. The side wall of the third shaft is provided with a third retainer groove away from the second shaft 422, and the third circlip is installed in the third retainer groove and abuts against the side of the third bearing away from the second shaft 422.
[0093] The third retainer groove can be an annular groove. The third circlip is installed in the third retainer groove, and the groove wall of the third retainer groove can limit the third circlip from moving along the axis direction of the third shaft. The third circlip also abuts against the side of the third bearing away from the second shaft 422, so that the third circlip can limit the movement of the third bearing along the axis direction of the third shaft, avoiding the third bearing from falling off the third shaft.
Claims
1. An electric scissors, characterized in that, The utility model relates to a cutting machine, including: A shell; A fixed cutter is fixedly installed in the shell; A movable cutter is rotationally connected with the fixed cutter; A transmission shaft is an integral structure, the transmission shaft includes a first shaft section and a second shaft section connected with each other, the first shaft section is closer to the movable cutter than the second shaft section, the first shaft section is an eccentric shaft, when the second shaft section drives the first shaft section to rotate, the first shaft section can push the movable cutter to reciprocating swing relative to the fixed cutter.
2. The electric scissors according to claim 1, characterized in that Further comprising a first bearing, the first bearing is sleeved on the first shaft section; When the first shaft section rotates, the first bearing pushes the movable cutter to reciprocating swing.
3. The electric scissors according to claim 2, characterized in that The first bearing is a common bearing; or, the first bearing is an eccentric bearing.
4. The electric scissors according to claim 1, characterized in that The second shaft section includes a first sub-shaft and a second sub-shaft, one end of the first sub-shaft away from the second sub-shaft is connected with the first shaft section, and one end of the first sub-shaft close to the second sub-shaft is connected with the second sub-shaft; The cross-sectional dimension of the first sub-shaft is greater than the cross-sectional dimension of the first shaft section, and the cross-sectional dimension of the first sub-shaft is less than the cross-sectional dimension of the second sub-shaft.
5. The electric scissors according to claim 4, characterized in that The first sub-shaft is an eccentric shaft; or, the first sub-shaft is a concentric shaft.
6. The electric scissors according to claim 4 or 5, characterized in that Further comprising a second bearing, the second bearing is sleeved on the first sub-shaft; When the first sub-shaft rotates, the second bearing contacts the shell.
7. The electric scissors according to claim 6, characterized in that When the first sub-shaft is an eccentric shaft, the second shaft section further includes a third sub-shaft, one end of the third sub-shaft is connected with the first sub-shaft, the other end of the third sub-shaft is connected with the second sub-shaft, and the third sub-shaft is a concentric shaft.
8. The electric scissors according to claim 7, characterized in that Further comprising a third bearing, the third bearing is sleeved on the third sub-shaft; When the third sub-shaft rotates, the third bearing contacts the shell.
9. The electric scissors according to claim 2, characterized in that Further comprising a first snap spring; The side wall of the first shaft section is provided with a first retainer groove away from the second shaft section, the first snap spring is installed in the first retainer groove and abuts against one side of the first bearing away from the second shaft section.
10. The electric scissors according to claim 8, characterized in that Further comprising a second snap spring; The side wall of the first sub-shaft is provided with a second retainer groove away from the second sub-shaft, the second snap spring is installed in the second retainer groove and abuts against one side of the second bearing away from the second sub-shaft; And / or, further comprising a third snap spring; The side wall of the third sub-shaft is provided with a third retainer groove away from the second sub-shaft, the third snap spring is installed in the third retainer groove and abuts against one side of the third bearing away from the second sub-shaft.