Edge trimmer

Abstract

The utility model relates to the technical field of tools, and discloses an edge trimmer which is provided with a tool bit. The edge trimmer comprises a motor, a tool bit, a connecting base, a first shell and a second shell. The motor comprises a stator and a rotor. The tool bit is connected with the rotor. One end of the rotor is rotationally connected to the connecting base, and an assembling part is arranged on the first side, facing the preset direction, of the connecting base. The first shell is provided with a containing space which penetrates in the preset direction and is matched with the stator, and one end of the first shell is connected with the assembling part. The connecting base and the first shell are of a split structure. The other end of the rotor is rotationally connected to the second shell, the second shell is provided with a containing cavity and an opening communicated with the containing cavity, the first shell is contained in the containing cavity through the opening, and the end, close to the opening, of the second shell is connected with the assembling part. According to the edge trimmer provided by the invention, the operation experience of an operator when the operator uses the edge trimmer can be ensured.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application relates to the tool technical field, in particular to a trimming machine. BACKGROUND

[0002] With the continuous development of tool manufacturing technology, various tools capable of realizing different functions begin to appear, which brings convenience to the operation personnel in the specific operation scene and can save the labor input. At the same time, the use of tools can effectively improve the operation efficiency.

[0003] The trimming machine is a tool driven by a motor to rotate the cutter head to mill the workpiece, which is widely used in construction, decoration and other operation scenes. The operation personnel can use the trimming machine to trim, mill, groove and process the surface of the workpiece. The shell is an important part of the trimming machine, which can provide a containing space for the motor and an assembly base. In order to ensure the insulation inside and the stability outside, the trimming machine usually adopts a double-shell structure. That is, the outer shell is assembled on the outside of the inner shell, and the different shells cooperate with each other to form the shell structure of the trimming machine.

[0004] The trimming machine usually also includes a seat body connected to the battery assembly or the power control device at the top, that is, a connecting seat at the end of the trimming machine away from the cutter head. In the prior art, in order to simplify the structure, the connecting seat is integrally arranged with the inner shell. That is, the connecting seat and the inner shell are integrally formed by the same polymer material. However, since the inner shell and the connecting seat have different effects on the assembly of parts, the integrally formed form of the same material is not conducive to ensuring the installation effect of the parts in the trimming machine, thereby affecting the operation experience of the trimming machine. Therefore, how to design the structure of the trimming machine to ensure the operation experience of the operation personnel when using the trimming machine is an important problem. CONTENT OF THE UTILITY MODEL

[0005] The purpose of the embodiment of the present application is to provide a trimming machine which can be beneficial to ensure the operation experience of the operation personnel when using the trimming machine.

[0006] To solve the above technical problems, the embodiment of the present application provides a trimming machine which is installed with a cutter head. The trimming machine includes a motor, a cutter head, a connecting seat, a first shell and a second shell. The motor includes a stator and a rotor. The cutter head is connected with the rotor. One end of the rotor is rotationally connected to the connecting seat, and the connecting seat is provided with an assembly part on the first side facing a predetermined direction. The first shell is provided with a containing space penetrating along the predetermined direction and cooperating with the stator, and one end of the first shell is connected with the assembly part. The connecting seat and the first shell are of a split structure. The other end of the rotor is rotationally connected to the second shell, the second shell is provided with a containing cavity and an opening communicating with the containing cavity, the first shell is received into the containing cavity through the opening, and one end of the second shell close to the opening is connected with the assembly part.

[0007] The edge trimmer provided by the embodiments of the present application forms a double-shell structure through the cooperation between different parts. Meanwhile, the connecting seat and the first shell for assembling the stator adopt a split structure, and the first shell and the second shell are simultaneously connected to the connecting seat to form an integral whole. By splitting the first shell and the connecting seat, different materials can be used to manufacture different parts of the shell, so that better materials can be used in the first shell which has a greater impact on the assembly effect, and the connecting seat can reduce the material standard. Thus, the installation effect of the components in the edge trimmer can be ensured while saving costs.

[0008] In some embodiments, the first shell includes a cylindrical part and a protruding part connected to each other, the cylindrical part is provided with an accommodation space, and the protruding part protrudes from the side of the cylindrical part away from the accommodation space and is connected to the assembly part. In this way, the cylindrical part can form the accommodation space for assembling the stator, and the protruding part can serve to connect and fix the assembly part.

[0009] In some embodiments, the protruding part has a plurality of protruding parts arranged around a predetermined direction, each protruding part is provided with a first through hole for the first fastener to pass through, the assembly part is provided with a first mounting hole corresponding to the first through hole, and the first fastener passes through the first through hole and is connected to the first mounting hole. In this way, the cooperation between the first fastener, the first through hole and the corresponding first mounting hole can provide protection for the connection and fixation between the first shell and the connecting seat.

[0010] In some embodiments, the cylindrical part is provided with a first stop, the assembly part is provided with a second stop, and the first stop abuts against the second stop. In this way, the cooperation between the different stops can ensure the assembly effect between the first shell and the connecting seat.

[0011] In some embodiments, the second shell includes a main body part and an extension part connected to each other, the main body part is provided with an accommodation cavity, and the extension part is located at one end of the main body part close to the opening and is connected to the assembly part. In this way, the main body part can form the accommodation cavity surrounding the first shell, and the extension part can form the cooperation basis for connecting and fixing the connecting seat.

[0012] In some embodiments, the extension part is arranged around a predetermined direction, the extension part is provided with a plurality of second through holes for the second fastener to pass through, the assembly part is provided with a second mounting hole corresponding to the second through hole, and the second fastener passes through the second through hole and is connected to the second mounting hole. In this way, the cooperation between the second fastener, the second through hole and the corresponding second mounting hole can provide protection for the connection and fixation between the second shell and the connecting seat.

[0013] In some embodiments, the extension portion is provided with a plurality of first matching surfaces surrounding the preset direction, the assembly portion is provided with a plurality of second matching surfaces surrounding the preset direction, and the plurality of first matching surfaces and the plurality of second matching surfaces correspond to each other and abut. In this way, the assembly effect between the second shell and the connecting seat can be ensured through the abutting matching between different matching surfaces.

[0014] In some embodiments, the hardness of the first shell is greater than the hardness of the connecting seat. In this way, the installation effect of the motor stator can be ensured by increasing the hardness of the first shell, so as to reduce vibration and improve the user comfort of the operator.

[0015] In some embodiments, the connecting seat is provided with a plurality of first bearing matching surfaces surrounding the preset direction, and the plurality of first bearing matching surfaces are rotationally connected to the rotor through the first bearing. In this way, the assembly precision between the connecting seat and the rotor can be ensured through the cooperation of the plurality of first bearing matching surfaces and the first bearing.

[0016] In some embodiments, the second shell is provided with a second bearing matching surface surrounding the preset direction, the second bearing matching surface is connected with a bearing bush, and the bearing bush is rotationally connected to the rotor through the second bearing. In this way, the assembly precision between the second shell and the rotor can be ensured through the cooperation of the second bearing matching surface and the second bearing.

[0017] Some embodiments of the present application provide a trimming machine, which adopts a split structure for the connecting seat and the inner shell. The split connecting seat and the inner shell can be connected in a certain form to form a whole. By adopting a split structure, different materials can be used to manufacture different parts of the shell. For the connecting seat part, the material standard can be reduced to reduce the cost. For the inner shell part, the material standard can be improved to improve the positioning effect of the motor in the trimming machine. Thus, the cost is saved while ensuring the operation experience of the operator when using the trimming machine. BRIEF DESCRIPTION OF DRAWINGS

[0018] One or more embodiments are illustrated by way of example in the figures that are part of this document, and which illustrate key implementations of the described examples. These examples are not, and are not intended to be, limiting in any regard, as they do not represent a complete list of variations and modifications which can be made to and otherwise incorporated with the described examples. The figures in the drawings are not necessarily to scale, nor are the figures intended to portray a complete implementation of an embodiment.

[0019] Figure 1 is a perspective structural schematic diagram of a trimming machine provided by some embodiments of the present application;

[0020] Figure 2 is a sectional structural schematic diagram of a trimming machine provided by some embodiments of the present application;

[0021] Figure 3 is an exploded structural schematic diagram of a trimming machine provided by some embodiments of the present application;

[0022] Figure 4 is an exploded structural schematic view of a housing in a trimming machine provided by some embodiments of the present application;

[0023] Figure 5 is a three-dimensional structural schematic view of a connecting seat in the housing of the trimming machine provided by some embodiments of the present application;

[0024] Figure 6 is a three-dimensional structural schematic view of a first housing in the housing of the trimming machine provided by some embodiments of the present application;

[0025] Figure 7 is a three-dimensional structural schematic view of a second housing in the housing of the trimming machine provided by some embodiments of the present application. DETAILED DESCRIPTION

[0026] In order to make the objectives, technical schemes and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in detail below with reference to the drawings. However, those skilled in the art can understand that, in the embodiments of the present application, many technical details are proposed in order to make the readers better understand the present application. However, the technical scheme claimed by the present application can be implemented even without these technical details and based on various changes and modifications of the following embodiments. The division of the following embodiments is for the convenience of description, and should not constitute any limitation on the specific embodiments of the present application, and the embodiments can be combined and referenced with each other without contradiction.

[0027] 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 herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application; the terms "comprising" and "having", and any variations thereof, as used in the specification and claims of the present application and in the above description of the drawings, are intended to cover not exclusively inclusive.

[0028] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connecting", "connecting" and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0029] As Figures 1 to 7As shown, the trimmer provided by some embodiments of the present application includes a motor, a cutter head, a connecting seat 11, a first housing 12 and a second housing 13. The motor includes a stator 21 and a rotor 22. The cutter head is connected to the rotor 22. One end of the rotor 22 is rotatably connected to the connecting seat 11, and the connecting seat 11 is oriented in a preset direction ( Figure 1 and Figure 3 An assembly portion 111 is provided on the first side of the first housing 12 (in the direction indicated by the arrow X in the middle). The first housing 12 is provided with a receiving space 101 extending along a predetermined direction and mating with the stator 21. One end of the first housing 12 is connected to the assembly portion 111. The connecting base 11 and the first housing 12 are of separate construction. The other end of the rotor 22 is rotatably connected to the second housing 13. The second housing 13 is provided with a receiving cavity 103 and an opening 102 communicating with the receiving cavity 103. The receiving cavity 103 accommodates the first housing 12 within. The end of the second housing 13 near the opening 102 is connected to the assembly portion 111.

[0030] The connection base 11 is the part of the housing that is connected to the battery pack or power input device. The connection base 11 can be provided with a slot to insert the battery pack to achieve wireless operation. The connection base 11 can also be provided with a through hole to lead out the power cord and use a cable to achieve power access. At the same time, the connection base 11 can be provided with a fixed Figure 7 The installation position of the brush holder and carbon brush assembly of the brush holder 104, carbon brush 105 and brush cover 106 shown. The assembly portion 111 is located on the first side of the connecting base 11 facing the preset direction, and the preset direction coincides with or is parallel to the direction of the center line L of the trimmer. The first side of the connecting base 11 is the side that connects the inner and outer shells. The assembly portion 111 can provide a basis for the connection and fixation between different shells and the connecting base 11. For example, a threaded hole can be opened in the assembly portion 111 to provide a basis for locking different shells with fasteners. The connecting base 11 can be a complete part, or it can be connected on the other side of the preset direction. Figure 5 and Figure 6 The cover 14 is shown closed.

[0031] The first housing 12 is the portion of the housing near the inside where the motor's stator 21 is assembled. It is made of an insulating material. The first housing 12 provides a stator assembly space 101, allowing the stator to be installed within the housing. The stator 21 is mounted within the housing through this space 101. This space 101 extends through the first housing 12 in a predetermined direction, facilitating the passage of the central axis of the rotor 22 through the inside of the first housing 12. The ends of the first housing 12 connect to the assembly portion 111 of the connector 11, forming a single integral unit with the connector 11.

[0032] The second shell 13 is a part of the shell that is close to the outer side and plays a role in structural reinforcement. The accommodating cavity 103 of the second shell 13 can accommodate the first shell 12. The second shell 13 can be made of a metal material with high hardness, such as aluminum alloy. The end of the second shell 13 close to the opening 102 is connected with the assembly part 111 of the connecting seat 11, so that the second shell 13 and the connecting seat 11 form an integral whole. Thus, the double-shell structure is formed by the cooperation between different parts.

[0033] Some embodiments of the present application provide an edge trimmer, which forms a double-shell structure through the cooperation between different parts. At the same time, the connecting seat 11 and the first shell 12 for assembling the stator 21 adopt a split structure, and the first shell 12 and the second shell 13 are simultaneously connected to the connecting seat 11 to form an integral whole. By setting the first shell 12 and the connecting seat 11 in a split structure, different materials can be used to manufacture and form different parts of the shell. In order to use better materials in the first shell 12 which has a greater impact on the assembly effect, the connecting seat 11 can reduce the material standard. Thus, it is beneficial to save costs while ensuring the operation experience of the operator using the edge trimmer.

[0034] In actual situations, different materials can be selected to manufacture the connecting seat 11 and the first shell 12, so that the hardness of the first shell 12 is greater than that of the connecting seat 11. For example, the connecting seat 11 and the first shell 12 can be made of insulating polymer plastic. For the connecting seat 11 part, a conventional material PA6-GF30 (70% nylon 6 plus 30% glass fiber reinforcement) can be used. For the first shell 12 part, a better material PA66-GF40 (60% nylon 66 plus 40% glass fiber reinforcement) can be used.

[0035] In some embodiments, the first shell 12 can include a connected cylindrical part 121 and a protruding part 122. The cylindrical part 121 is provided with an accommodating space 101, and the protruding part 122 is protrudingly arranged from the side of the cylindrical part 121 away from the accommodating space 101, and the protruding part 122 is connected with the assembly part 111.

[0036] The cylindrical part 121 is the main part of the first shell 12, and the axis direction of the cylindrical part 121 is parallel to the preset direction. The cylindrical part 121 is used to form the accommodating space 101 for assembling the stator 21. The protruding part 122 is located on the outer side of the cylindrical part 121 away from the accommodating space 101, and the protruding part 122 provides convenience for the connection and fixation between the first shell 12 and the assembly part 111 of the connecting seat 11. Thus, different parts are provided in the first shell 12 to play different roles. In actual situations, the protruding part 122 can adopt an integral molding structure with the cylindrical part 121.

[0037] In addition, the protrusions 122 can be multiple and arranged around a preset direction. Each protrusion 122 is provided with a first through hole 123 for the first fastener 15 to pass through, and the assembly part 111 is provided with a first mounting hole 112 corresponding to the first through hole 123, and the first fastener 15 passes through the first through hole 123 and is connected with the first mounting hole 112.

[0038] As shown in Figure 1 and Figure 3 , the multiple protrusions 122 are respectively located at different positions outside the cylindrical part 121, and can play a connecting and fixing role at different positions. In addition, each protrusion 122 is provided with a first through hole 123, and the assembly part 111 is provided with a first mounting hole 112 corresponding to the first through hole 123. When connecting the first shell 12 with the connecting seat 11, the first fastener 15 can pass through the first through hole 123 of the protrusion 122 and be screwed into the first mounting hole 112 of the assembly part 111. Thus, the connection and fixation between the first shell 12 and the connecting seat 11 are realized.

[0039] In Figure 1 , the first shell 12 includes three protrusions 122, and each protrusion 122 is provided with a first through hole 123. The assembly part 111 of the connecting seat 11 is provided with three corresponding first mounting holes 112. In addition, each first mounting hole 112 is arranged in an independent column structure, which can facilitate positioning when connecting the first shell 12 with the connecting seat 11. The first shell 12 and the connecting seat 11 in a split structure can be connected and fixed by multiple fasteners, thereby forming an integral whole.

[0040] In some embodiments, the cylindrical part 121 can be provided with a first stop 124, and the assembly part 111 is provided with a second stop 113, and the first stop 124 abuts against the second stop 113.

[0041] The stop is a structure for positioning and matching in a component, and the stop includes a stepped surface and is arranged in a ring shape at one end of the component. The stop includes a concave stop and a convex stop, and the concave stop can cooperate with the convex stop. When different stops are matched, the stepped surfaces of the stops abut against each other, thereby ensuring the positioning and matching effect. Therefore, by arranging different stops on the cylindrical part 121 and the assembly part 111, the axial position and the radial position of the first shell 12 can be simultaneously limited, so as to ensure the connection effect between the first shell 12 and the connecting seat 11.

[0042] As shown in Figure 1 and Figure 4 , the second shell 13 can include a main body part 131 and an extension part 132 connected with each other. The main body part 131 is provided with a receiving cavity 103, and the extension part 132 is located at one end of the main body part 131 close to the opening 102, and the extension part 132 is connected with the assembly part 111.

[0043] The main body 131 is the main part of the second shell 13, which is used to form the accommodating cavity 103 for accommodating the first shell 12, so as to be sleeved on the outer side of the first shell 12. The extension part 132 is located at one end of the main body 131 close to the opening 102, which can provide a matching basis for the connection between the second shell 13 and the connecting seat 11. The extension part 132 can be integrally formed with the main body 131 to ensure the overall structural hardness of the second shell 13.

[0044] In addition, the extension part 132 can be arranged around a predetermined direction. The extension part 132 is provided with a plurality of second through holes 133 for the second fasteners 16 to pass through, and the assembly part 111 is provided with a plurality of second mounting holes 114 corresponding to the second through holes 133, and the second fasteners 16 pass through the second through holes 133 and are connected with the second mounting holes 114.

[0045] As shown in Figure 1 and Figure 4 , the extension part 132 adopts a ring structure and has a larger radial dimension relative to the main body 131. So as to realize the connection and fixation between the outer side of the first shell 12 and the connecting seat 11. The extension part 132 is provided with a plurality of second through holes 133, and the assembly part 111 is provided with corresponding second mounting holes 114. When the connection and fixation between the second shell 13 and the connecting seat 11 is performed, the second fasteners 16 can pass through the second through holes 133 of the extension part 132 and be screwed into the second mounting holes 114 of the assembly part 111. Thus, the second shell 13 and the connecting seat 11 are connected to form a whole.

[0046] In Figure 1 , the extension part 132 of the second shell 13 is provided with four second through holes 133. The assembly part 111 of the connecting seat 11 is provided with four corresponding second mounting holes 114. And each second mounting hole 114 is arranged in an independent column structure, which can facilitate the positioning when the second shell 13 and the connecting seat 11 are connected. The second shell 13 and the connecting seat 11 in a split structure can be connected and fixed by a plurality of fasteners to form a whole.

[0047] In some embodiments, the extension part 132 can be provided with a plurality of first matching surfaces 134 around a predetermined direction, and the assembly part 111 is provided with a plurality of second matching surfaces 115 around a predetermined direction, and the plurality of first matching surfaces 134 and the plurality of second matching surfaces 115 one-to-one correspond and abut.

[0048] The first mating surface 134 and the second mating surface 115 are both arranged around a predetermined direction. The abutment between the first mating surface 134 and the second mating surface 115 serves to position the connection between the second housing 13 and the connecting base 11. When securing the second housing 13 to the connecting base 11, the abutment between the first mating surface 134 and the second mating surface 115 limits their relative position, ensuring a secure connection between the second housing 13 and the connecting base 11.

[0049] like Figure 2 and Figure 4 As shown, the extension portion 132 is provided with a first mating surface 134 at a position adjacent to the second through hole 133 , and the assembly portion 111 is provided with a second mating surface 115 at a position adjacent to the second mounting hole 114 . The first mating surface 134 and the second mating surface 115 maintain a corresponding relationship.

[0050] In some embodiments, a first rib 125 extending along a preset direction may be provided on a side of the first housing 12 close to the accommodating space 101 , and the first rib 125 is used to cooperate with an outer side surface of the stator.

[0051] The first rib 125 is protrudingly provided on the inner wall surface of the first shell 12 near the accommodating space 101. The surface of the first rib 125 away from the cylindrical wall portion of the first shell 12 can cooperate with the outer side surface of the stator 21, thereby accurately defining the assembly position of the stator 21. There can be multiple first ribs 125, that is, they can be arranged at different positions on the inner wall surface of the first shell 12. The space enclosed by each first rib 125 is the assembly space of the stator 21. Through the mutual cooperation between each first rib 125, the accuracy of the stator 21 during assembly can be improved, and the coaxiality of the stator 21 during installation can be ensured. In actual circumstances, a step surface can be provided on the first rib 125 to define the axial position of the stator 21 during assembly. The stator 21 can be assembled with the first shell 12 by the stator screw 211.

[0052] In addition, a second rib 126 extending in a preset direction may be provided on a side of the first shell 12 away from the accommodating space 101 , and the second rib 126 cooperates with an inner wall surface 135 of the second shell 13 close to the accommodating cavity.

[0053] The second ribs 126 are protruded on the outer wall surface of the first housing 12 away from the accommodating space 101. The surface of the second ribs 126 away from the cylindrical wall portion of the first housing 12 can cooperate with the inner wall surface 135 of the second housing 13, so as to accurately define the assembly position of the second housing 13. The number of the second ribs 126 can be multiple, i.e. arranged at different positions on the outer wall surface of the first housing 12. The peripheral area of each second rib 126 is the assembly space of the second housing 13. Through the cooperation between each second rib 126, the accuracy of the assembly of the second housing 13 can be improved, and the coaxiality of the second housing 13 during installation can be ensured.

[0054] As shown in Figure 6 and Figure 7 The connecting seat 11 and the second housing 13 can also provide a basis for the assembly of the rotor 22. The connecting seat 11 is provided with a plurality of first bearing cooperation surfaces 116 around a predetermined direction, and the second housing 13 is provided with a second bearing cooperation surface 136 around a predetermined direction. The first bearing 23 cooperating with one end of the rotor 22 can be assembled into the mounting hole of the connecting seat 11 and abut against the plurality of first bearing cooperation surfaces 116. The second bearing 24 cooperating with the other end of the rotor 22 can be turned into the mounting hole of the second housing 13 through the bearing bush 25, so that the bearing bush 25 abuts against the second bearing cooperation surface 136. Thus, the assembly of the rotor 22 can be realized. The two ends of the second bearing 25 can be respectively provided with a flat washer 241 and a wave washer 242, and the position of the flat washer 241 can be locked by a stop washer 243.

[0055] When the trimming machine is working, the cutter head can be driven by the rotor 22 of the motor to rotate, so as to perform trimming, grooving and other work on the surface of the workpiece. In addition, the trimming machine also includes a base 41, which abuts against the workpiece when the operator performs work. The operator can move the trimming machine according to the required trajectory to perform specific work.

[0056] The motor is accommodated in the housing, and a fan 31 can also be arranged in the housing to play a heat dissipation role. The housing adopts a double-housing structure of an outer housing and an inner housing, and the inner housing and the connecting seat 11 are arranged in a split form. The outer housing and the inner housing are connected to the connecting seat 11 to form a complete housing structure. By adopting a split form for the first housing 12 on the inner side and the connecting seat 11, different insulating materials can be used for the manufacturing and forming of the two, so as to save costs while ensuring the installation effect of the motor, reduce the vibration problem caused by poor assembly effect, and ensure the operation experience of the operator when using the trimming machine.

[0057] Those skilled in the art can understand that the above embodiments are specific embodiments for implementing the present application, and in actual application, various changes can be made in form and details without departing from the spirit and scope of the present application.

Claims

1. A trimming machine equipped with a cutter head, characterized in that: The trimming machine comprises: A motor comprising a stator and a rotor, wherein the cutter head is connected to the rotor; a connecting seat, one end of the rotor being rotatably connected to the connecting seat, and a first side of the connecting seat facing a preset direction being provided with an assembly portion; A first housing is provided with an accommodating space penetrating along a preset direction and cooperating with the stator, one end of the first housing is connected to the assembly portion; the connecting seat and the first housing are of a split structure; a second housing, the other end of the rotor being rotatably connected to the second housing, the second housing being provided with a receiving cavity and an opening communicating with the receiving cavity, the first housing being received in the receiving cavity via the opening, and one end of the second housing adjacent to the opening being connected to the assembly portion; The material properties of the connecting base are different from the material properties of the first shell.

2. The trimming machine according to claim 1, characterized in that: The first shell includes a connected cylindrical portion and a protruding portion. The cylindrical portion is provided with the accommodating space. The protruding portion protrudes from a side of the cylindrical portion away from the accommodating space. The protruding portion is combined with the assembly portion.

3. The trimming machine according to claim 2, characterized in that: There are multiple protrusions and they are arranged around the preset direction. Each protrusion is provided with a first through hole for the first fastener to pass through. The assembly part is provided with a first mounting hole corresponding to the first through hole. The first fastener passes through the first through hole and is connected to the first mounting hole.

4. The trimming machine according to claim 2, characterized in that: The cylindrical portion is provided with a first stopper, and the assembly portion is provided with a second stopper, wherein the first stopper abuts against the second stopper.

5. The trimming machine according to claim 1, characterized in that: The second shell includes a main body and an extension part connected to each other. The main body is provided with the accommodating cavity. The extension part is located at one end of the main body close to the opening, and the extension part is combined with the assembly part.

6. The trimming machine according to claim 5, characterized in that: The extension portion is arranged around the preset direction, and the extension portion is provided with a plurality of second through holes for the second fasteners to pass through. The assembly portion is provided with second mounting holes corresponding to the second through holes, and the second fasteners pass through the second through holes and are connected to the second mounting holes.

7. The trimming machine according to claim 5, characterized in that: The extension portion is provided with a plurality of first mating surfaces surrounding the preset direction, and the assembly portion is provided with a plurality of second mating surfaces surrounding the preset direction. The plurality of first mating surfaces abut against the plurality of second mating surfaces in a one-to-one correspondence.

8. The trimming machine according to claim 1, characterized in that: The material property is configured as a hardness property, and the hardness of the first shell is greater than the hardness of the connecting base.

9. The trimming machine according to claim 1, characterized in that: The connecting seat has a plurality of first bearing matching surfaces surrounding the preset direction, and the plurality of first bearing matching surfaces are rotatably connected to the rotor through first bearings.

10. The trimming machine according to claim 1, characterized in that: The second housing has a second bearing fitting surface surrounding the preset direction, the second bearing fitting surface is connected to a bearing bushing, and the bearing bushing is rotatably connected to the rotor through a second bearing.

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