Edge trimmer

Abstract

The utility model relates to an edge trimmer which comprises a machine shell, a driving unit contained in the machine shell and an output unit driven by the driving unit, the driving unit comprises a stator, a rotor and a driving shaft, the stator and the rotor are connected with each other, the driving shaft extends in the axial direction, and the driving shaft is fixedly connected to the rotor; the driving shaft is configured to be in a split type and comprises a motor shaft fixedly connected with the rotor and an output shaft for driving the output unit, and the motor shaft is combined with the output shaft. According to the utility model, the driving shaft is configured into a split type, the driving shaft comprises the motor shaft fixedly connected with the rotor and the output shaft for driving the output unit, and the motor shaft is combined with the output shaft, so that the situation that the traditional integrated driving shaft is not easy to maintain, the whole driving shaft is scrapped and the cost loss is too large after a fault occurs is avoided while the rotating effect of the whole machine is ensured to be realized.

Description

Technical Field

[0001] The utility model relates to a trimming machine, in particular to a trimming machine used in occasions such as decoration and construction. Background Art

[0002] A trimming machine is a power tool that drives an output unit to rotate by a driving unit to perform processing operations on workpieces such as wood, and has an irreplaceable position in industries such as construction and decoration. When the driving shaft of the driving unit drives the output unit to operate, the driving shaft needs to rotate, and the bearing assists in cooperation. The bearing supports the axial two ends of the output shaft to reduce friction and thus improve the rotation accuracy.

[0003] In the trimming machine of the prior art, reference can be made to the Chinese utility model patent No. CN201353804Y announced on December 02, 2009, which discloses: a trimming machine, including a machine shell, a motor housed in the machine shell, an output shaft driven to rotate by the motor, and a chuck connecting the output shaft and the tool. The output shaft of the above trimming machine is of an integral structure, and the motor, chuck and output shaft are integral parts. However, when any one of the integral parts fails, it will affect the overall performance. Moreover, since the output shaft is of an integral structure, it is not easy to repair later, and the whole shaft is scrapped, resulting in too large a cost loss.

[0004] In view of this, it is necessary to provide an improved trimming machine to overcome the defects of the prior art. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide a trimming machine with a split structure and easy to maintain.

[0006] The utility model can adopt the following technical solutions to solve the problems of the prior art: a trimming machine, including a machine shell, a driving unit housed in the machine shell, and an output unit driven by the driving unit. The driving unit includes a stator and a rotor connected to each other and a driving shaft extending axially. The driving shaft is fixedly connected to the rotor; the driving shaft is configured to be split, and the driving shaft includes a motor shaft fixedly connected to the rotor and an output shaft driving the output unit, and the motor shaft is combined with the output shaft.

[0007] A further improvement scheme is: the motor shaft includes a main shaft section fixedly connected to the rotor and a mounting portion protruding from the main shaft section, and the mounting portion is combined with the output shaft.

[0008] A further improvement solution is as follows: The mounting portion has a first mounting portion protruding from the end face of the main shaft section and a second mounting portion protruding from the end face of the first mounting portion. The output shaft includes a first section for mounting the output unit and a second section protruding from the end face of the first section. The first section is coupled to the second mounting portion, and the second section is coupled to the first mounting portion.

[0009] A further improvement solution is as follows: The second section has a mounting groove protruding from the end face of the first section, and the mounting groove is coupled to the first mounting portion.

[0010] A further improvement solution is as follows: The trimming machine further includes a bearing chamber mounted on the machine housing and a bearing mounted in the bearing chamber, and the bearing is coupled to the first section.

[0011] A further improvement solution is as follows: The second section further has a shoulder protruding from the periphery of the mounting groove. One end of the shoulder abuts against the main shaft section, and the other end abuts against the bearing.

[0012] A further improvement solution is as follows: The first section has a through cylindrical hole, and the second mounting portion is coupled to the cylindrical hole.

[0013] A further improvement solution is as follows: The mounting portion is configured to be flat and is configured to be composed of an arc surface and a plane. The curvature of the arc surface is equal to the curvature of the first section, and the plane at least partially abuts against the mounting groove.

[0014] Compared with the prior art, the present utility model has the following beneficial effects: By configuring the drive shaft as a split type, the drive shaft includes a motor shaft fixedly connected to the rotor and an output shaft for driving the output unit. The motor shaft is coupled to the output shaft. While ensuring the rotation effect of the whole machine, it avoids the situation that after a traditional integral drive shaft fails, it is not easy to repair and the whole shaft is scrapped, resulting in too large a cost loss. Specifically, the second section further has a shoulder protruding from the periphery of the mounting groove. Through the setting of the shoulder, on the one hand, the bearing is used to prevent the output shaft from slipping on the motor shaft, and on the other hand, it realizes the function of fixing and positioning the bearing; in addition, the mounting portion is configured to be flat, which can prevent the output shaft from rotating on the motor shaft and realize the function of revolution to achieve the output effect of the whole machine. [Description of the Drawings]

[0015] The following further elaborates in detail on the specific implementation manners of the present utility model with reference to the accompanying drawings:

[0016] Figure 1 is a schematic structural diagram of the trimming machine of the present utility model;

[0017] Figure 2 is Figure 1 an exploded schematic diagram of the trimming machine shown;

[0018] Figure 3 is Figure 1 A schematic structural diagram of the drive unit of the trimming machine shown;

[0019] Figure 4 is Figure 3 A partial structural diagram of the drive unit of the trimming machine shown;

[0020] Figure 5 is Figure 3 A schematic structural diagram of the output shaft of the trimming machine shown. [Detailed implementation manners]

[0021] The present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0022] The terms used in the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. For example, the terms indicating orientation or positional relationship such as "upper", "lower", "front", "rear", etc. are only based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device / component referred to must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present utility model.

[0023] Please refer to Figures 1 to 5 As shown, the embodiment of the present utility model relates to a trimming machine 100, which is used for trimming, grooving and other processing operations on workpieces such as wood. The trimming machine 100 includes a machine shell 1, a drive unit 2 housed in the machine shell, and an output unit 5 driven by the drive unit. A cutter head (not shown) is installed on the output unit 5. Under the action of a drive source, the drive unit 2 drives the output unit 5 of the trimming machine 100. When the operator performs a processing operation, the base (not shown) of the trimming machine 100 abuts against the workpiece, and the trimming machine 100 is moved according to the required trajectory, so that the cutter head trims the workpiece.

[0024] In this embodiment, the drive unit 2 includes a stator (not shown), a rotor 4 connected to each other, and a drive shaft 3 extending axially. The drive shaft 3 is fixedly connected to the rotor 4. The drive shaft 3 is configured to be split-type. The drive shaft 3 being configured to be split-type enables independent processing without mutual influence, avoiding the situation that after a traditional integral drive shaft fails, it is not easy to repair and the whole shaft is scrapped, resulting in too large a cost loss. Specifically, the drive shaft 3 includes a motor shaft 31 fixedly connected to the rotor 4 and an output shaft 32 for driving the output unit 5. The motor shaft 31 is coupled to the output shaft 32. By improving the drive shaft 3 from a traditional integral main shaft to a split-type main shaft, it is convenient for later maintenance, and the worn parts can be replaced targeted, reducing costs.

[0025] Further, the motor shaft 31 includes a main shaft section 311 fixedly connecting the rotor 4 and a mounting portion 312 protruding from the main shaft section 311, and the mounting portion 312 is coupled to the output shaft 32. In addition, the mounting portion 312 has a first mounting portion 3121 protruding from the end face of the main shaft section 311 and a second mounting portion 3122 protruding from the end face of the first mounting portion 3121. The output shaft 32 includes a first section 321 for mounting the output unit 5 and a second section 322 protruding from the end face of the first section 321. The first section 321 is coupled to the second mounting portion 3122, and the second section 322 is coupled to the first mounting portion 3121. The second section 322 has a mounting groove 3221 protruding from the end face of the first section 321, and the mounting groove 3221 is coupled to the first mounting portion 3121 to achieve circumferential fixation.

[0026] Please refer to Figure 2 As shown, the trimming machine further includes a bearing chamber 6 mounted on the housing 1 and a bearing 7 mounted in the bearing chamber 6, and the bearing 7 is coupled to the first section 321. Specifically, the second section 322 further has a shoulder 3222 protruding from the periphery of the mounting groove 3221. By providing the shoulder 3222, on the one hand, the output shaft 32 is prevented from slipping on the motor shaft 31 by means of the bearing 7, and on the other hand, the bearing 7 is fixed and positioned. Specifically, one end of the shoulder 3222 abuts against the main shaft section 311, and the other end abuts against the bearing 7.

[0027] Please refer to Figure 4 and Figure 5 As shown, the first section 321 has a through cylindrical hole 3211, and the second mounting portion 3122 is coupled to the cylindrical hole 3211. Through the above arrangement, it is convenient to control the coaxiality of the motor shaft 31 and the output shaft 32 and avoid the phenomenon of excessive vibration.

[0028] In this embodiment, the mounting portion 312 is configured to be flat, which can prevent the output shaft 32 from rotating on the motor shaft 31 and achieve the effect of revolution to achieve the overall machine output effect.

[0029] Specifically, the mounting portion 312 is configured to be composed of an arc surface 312a and a plane 312b, and the curvature of the arc surface 312a is equal to the curvature of the first section 321, and the plane 312b at least partially abuts against the mounting groove 3221. Through the above arrangement, a high-precision fit of the motor shaft 31 and the output shaft 32 is achieved, and the situation of large vibration caused by using the split drive shaft 3 is avoided.

[0030] The present invention is not limited to the above specific embodiments. Those of ordinary skill in the art can easily understand that there are many alternative solutions for the trimming machine of the present invention without departing from the principles and scope of the present invention. The protection scope of the present invention is subject to the content of the claims.

Claims

1. A trimmer, comprising a housing, a driving unit accommodated in the housing, and an output unit driven by the driving unit, wherein the driving unit comprises a stator and a rotor connected to each other and an axially extending driving shaft, wherein the driving shaft is fixedly connected to the rotor; characterized in that: The drive shaft is configured as a split type, and includes a motor shaft fixedly connected to the rotor and an output shaft driving the output unit, wherein the motor shaft is coupled to the output shaft.

2. The trimming machine according to claim 1, characterized in that: The motor shaft comprises a main shaft section fixedly connected to the rotor and a mounting portion protruding from the main shaft section, wherein the mounting portion is combined with the output shaft.

3. The trimming machine according to claim 2, characterized in that: The mounting portion includes a first mounting portion protruding from the end face of the main shaft section and a second mounting portion protruding from the end face of the first mounting portion. The output shaft includes a first section for mounting the output unit and a second section protruding from the end face of the first section. The first section is combined with the second mounting portion, and the second section is combined with the first mounting portion.

4. The trimming machine according to claim 3, characterized in that: The second section has a mounting groove protruding from the end surface of the first section, and the mounting groove is combined with the first mounting portion.

5. The trimming machine according to claim 4, characterized in that: The trimmer further comprises a bearing chamber installed in the housing and a bearing installed in the bearing chamber, wherein the bearing is combined with the first section.

6. The trimming machine according to claim 5, characterized in that: The second section also has a shoulder protruding from the periphery of the mounting groove, one end of the shoulder abuts against the main shaft section, and the other end abuts against the bearing.

7. The trimming machine according to claim 3, characterized in that: The first section has a penetrating cylindrical hole, and the second mounting portion is coupled to the cylindrical hole.

8. The trimming machine according to claim 6, characterized in that: The mounting portion is configured to be flat, and is configured to consist of a curved surface and a flat surface, the curvature of the curved surface is equal to the curvature of the first section, and the flat surface at least partially abuts against the mounting groove.

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