Motor and machine tool
By installing a balancing disc inside the optical encoder and setting a cover and an operating window between it and the optical encoder, the problem of the optical encoder covering the motor shaft is solved, the dynamic balance adjustment of the motor is achieved, and the vibration performance of the machine is improved.
Patent Information
- Application Number
- CN202380092917.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-04-24
- Publication Date
- 2025-09-12
AI Technical Summary
In the prior art, the optical encoder is installed at the end of the motor shaft to cover the motor shaft, which makes it impossible to install the balancing disk without removing the optical encoder, affecting the dynamic balance adjustment of the motor.
A balancing disc is installed inside the optical encoder, and an operating window and a mounting structure are provided between the balancing disc and the optical encoder through a cover plate, allowing the balancing hole to be adjusted without disassembling the optical encoder.
This allows balance adjustment without removing the optical encoder, improving the vibration performance of the machine.
Smart Images
Figure CN120642188A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to mechanical technology, and more particularly, to electric motors and machine tools. Background Art
[0002] In the machine tool industry, as users' requirements for machine tool vibration are getting higher and higher, the requirements for the dynamic balance level of motors are also increasing. Many users perform dynamic balancing on motors before installing them in machine tools.
[0003] Figure 1 The figure shows a schematic diagram of a balancing disk. The balancing disk 1 can be mounted on the end of the motor shaft of an electric motor, and the user can install screws into the balancing holes 11 of the balancing disk 1 to eliminate unbalanced mass. However, for motors equipped with an optical encoder, the optical encoder is mounted at the end of the motor shaft and covers the motor shaft, making it impossible to mount the balancing disk at the end of the motor shaft.
[0004] Therefore, those skilled in the art have endeavored to find solutions for mounting a balancing disc on an electric motor. Summary of the Invention
[0005] According to an embodiment of the present application, a motor and a machine tool for mounting a balancing disc on the motor are provided.
[0006] The motor provided by the embodiment of the present application includes: a motor shaft, an optical encoder and an end shield; the optical encoder is mounted on the motor shaft; the motor further includes: a balancing disk, which is configured to be mounted on the motor shaft and located inside the optical encoder, the diameter of the circle formed by the balancing holes on the balancing disk is larger than the diameter of each of the optical encoder and the fixing element of the optical encoder, so that the balancing holes can be operated without disassembling the optical encoder; and a cover plate, which is configured to be located between the balancing disk and the optical encoder and fixed on the end shield, the cover plate including: at least one operation window for exposing some of the balancing holes; and a mounting structure for fixing the fixing element of the optical encoder.
[0007] The machine tool provided by the embodiment of the present application includes: the electric motor mentioned above.
[0008] It can be seen from the above technical solutions in the embodiments of the present application that since the cover plate including the mounting structure and the operation window is arranged between the balancing disk and the optical encoder, the fixing element of the optical encoder can be fixed on the mounting structure, and the balancing hole on the balancing disk can be operated through the operation window, so that the balance adjustment can be achieved on the user side and the vibration of the machine can be improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] For a better understanding of the present application, reference should be made to the following detailed description taken in conjunction with the following drawings, wherein like reference numerals refer to corresponding parts throughout.
[0010] Figure 1 is a schematic diagram showing a balancing disk.
[0011] Figure 2 is a schematic diagram showing an electric motor having a balancing disk.
[0012] Figure 3 FIG. 1 is a schematic diagram illustrating a motor having a balancing disk according to an embodiment of the present application.
[0013] Figure 4 and 5 Each of them is a schematic diagram showing a motor with a cover according to an embodiment of the present application.
[0014] The reference numerals are as follows:
[0015]
[0016] DETAILED DESCRIPTION
[0017] Currently, some electric motors with balancing discs use gear encoders instead of optical encoders. Figure 2 Schematic diagram showing a motor with a balancing disk. Figure 2 As shown in FIG, the gear 21 of the gear encoder 2 is fixed to the motor shaft 3, and the encoder measuring head 22 of the gear encoder 2 is fixed to the end shield 4 through the side of the gear 21, and then the balancing disk 1 can be mounted on the end of the motor shaft 3. However, the gear encoder 2 is more expensive, and its resolution ratio is generally lower than that of the optical encoder.
[0018] In order to mount a dummy disc on an electric motor having an optical encoder, it is conceivable to mount the dummy disc on the motor shaft before mounting the optical encoder. Figure 3 Schematic diagram showing a motor with a balancing disk according to an embodiment of the present application. Figure 3 As shown in FIG, the motor includes a motor shaft 3, an optical encoder 5, a balancing disc 1, and an end shield 4. The optical encoder 5 is mounted on the motor shaft 3. The balancing disc 1 is also mounted on the motor shaft 3 and is located inside the optical encoder 5. The balancing hole 11 on the balancing disc 1 forms a circle. The diameter of the circle is larger than the diameter of each of the optical encoder 5 and the fixing element 51 of the optical encoder 5, so that the balancing hole 11 can be operated without disassembling the optical encoder 5. Figure 3In the embodiment shown in , the fixing element 51 is a torque arm. In another embodiment, the fixing element 51 can be a flange of the housing of the optical encoder 5, or can include two support arms extending from the housing of the optical encoder 5, or can be other structures that can achieve fixed installation of the optical encoder 5.
[0019] However, in Figure 3 In the embodiment, the structure for fixing the fixing element 51 to the end shield 4 is covered by the balancing disc 1 , so that the fixing element 51 cannot be fixed to the end shield 4 .
[0020] In order to solve the above problems, it is considered to provide a cover plate in the embodiments of the present application.
[0021] Reference will now be made in detail to the examples illustrated in the accompanying drawings. In the following detailed description, numerous specific details are set forth to provide a thorough understanding of the present application. Additionally, the figures are illustrative of examples, and the assemblies shown in the figures are not necessarily required to practice the present application. In other instances, well-known assemblies, components, and circuits have not been described in detail to avoid unnecessarily obscuring aspects of the examples.
[0022] Figure 4 and 5 Each of them is a schematic diagram showing a motor with a cover according to an embodiment of the present application.
[0023] like Figure 4 and 5 As shown in FIG, the motor further includes a cover plate 6. The cover plate 5 is located between the balancing disc 1 and the optical encoder 5 and is fixed to the end shield 4. The cover plate 6 includes at least one operation window 61 for exposing some of the balancing holes 11 and a mounting structure 62 for fixing the fixing element 51 of the optical encoder 5.
[0024] In this embodiment, the mounting structure 62 includes two bosses 621, each of which includes a screw hole 622. The fixing element 51 of the optical encoder 5 can be fixed to the cover plate 6 via the screws 7 and the screw holes 622. Of course, in other embodiments, if the cover plate 5 is thick enough, the bosses 621 may not be present, and the screw holes 622 may be directly provided on the surface of the cover plate 6. In another embodiment, the screw holes 622 may not be present, that is, the fixing element 51 of the optical encoder 5 can be fixed to the cover plate 6 via a riveting structure.
[0025] like Figure 4 and 5As shown in FIG, at least one operating window 61 is used to expose some of the balancing holes 11, allowing a user to see the balancing holes 11 and perform balancing adjustments through the exposed balancing holes 11. When performing balancing adjustments, the user does not need to see all of the balancing holes 11 because, when an unbalanced mass is found, the user rotates the motor shaft 3 until the unbalanced mass reaches the zero-scale position (e.g., the 0° position) set in the balancing machine, and then performs balancing adjustments using the balancing holes at the zero-scale position. Therefore, the at least one operating window 61 includes a window area whose position corresponds to the zero-scale position of the balancing machine when the motor is positioned on the balancing machine.
[0026] The zero scale position is typically at the top center of the motor, so at least one operating window 61 may be such as Figure 4 As shown in the figure, an operating window 61 is set in the middle of the top of the motor, that is, the motor only includes one balancing adjustment direction, and when the motor is positioned on the balancing machine according to the balancing adjustment direction, the position of the operating window 61 corresponds to the zero scale position of the balancing machine.
[0027] There is a possibility that the zero scale position is not in the top center of the motor but on the side of the motor. Taking this possibility into account, the operating window can be optimized to Figure 5 , so that the balancing hole in the middle of the top and the balancing hole in the middle of the side are both visible. At the same time, the mounting structure 62 for fixing the fixing element 51 is adjusted to a 45° position. That is, the motor can have two adjustment directions, namely a first balancing adjustment direction and a second balancing adjustment direction; the at least one operating window 61 is two operating windows 61, each operating window including a first window area 611 corresponding to the zero scale position of the balancing machine when the motor is positioned on the balancing machine according to the first balancing adjustment direction, and a second window area 612 corresponding to the zero scale position of the balancing machine when the motor is positioned on the balancing machine according to the second balancing adjustment direction.
[0028] Alternatively, the cover plate 6 can be rotated around the end shield 4, in which case the at least one operating window 61 can be an operating window 61, and when the motor is positioned on the balancing machine, the operating window 61 can be rotated to a position corresponding to the zero scale position of the balancing machine.
[0029] An embodiment of the present application further provides a machine tool, which includes the above-mentioned electric motor.
[0030] It can be seen from the above technical solutions in the embodiments of the present application that since the cover plate including the mounting structure and the operation window is arranged between the balancing disk and the optical encoder, the fixing element of the optical encoder can be fixed on the mounting structure, and the balancing hole on the balancing disk can be operated through the operation window, so that the balance adjustment can be achieved on the user side and the vibration of the machine can be improved.
[0031] It should be understood that, as configured herein, the singular forms "a" ("a," "an," "the") are intended to include the plural forms unless the context clearly supports an exception. It should also be understood that, as configured herein, "and / or" is intended to include any and all possible combinations of one or more of the associated listed items.
[0032] The number of embodiments of the present application is configured only for description and does not indicate advantages of the implementation.
[0033] For purposes of illustration, the foregoing description has been described with reference to specific examples. However, the illustrative discussion above is not intended to be exhaustive or to limit the present application to the precise forms disclosed. In light of the above teachings, many modifications and variations are possible. The examples are selected and described in order to best illustrate the principles of the present application and its practical application, thereby enabling those skilled in the art to best utilize the present application and the various examples with various modifications suitable for the specific use contemplated.
Claims
1. A motor comprising a motor shaft (3), an optical encoder (5) and an end shield (4); the optical encoder (5) is to be mounted on the motor shaft (3); characterized in that, Further including: a balancing disc (1) configured to be mounted on the motor shaft (3) and located inside the optical encoder (5), the diameter of a circle formed by a balancing hole (11) on the balancing disc (1) being larger than the diameter of each of the optical encoder (5) and a fixing element (51) of the optical encoder (5), so as to enable the balancing hole (11) to be operated without disassembling the optical encoder (5); and A cover plate (6) is configured to be located between the balancing disc (1) and the optical encoder (5) and fixed to the end shield (4), the cover plate (6) comprising: at least one operating window (61) for exposing some of the balancing holes (11); and a mounting structure (62) for fixing the fixing element (51) of the optical encoder (5).
2. The electric motor according to claim 1, wherein The mounting structure includes two bosses, and each boss includes a screw hole.
3. The electric motor according to claim 1, wherein The at least one operating window (61) includes a window area whose position corresponds to a zero scale position of the balancing machine when the motor is positioned on the balancing machine.
4. The electric motor according to claim 3, characterized in that The at least one operating window (61) is an operating window, and the cover plate (6) is rotatable; when the motor is positioned on the balancing machine, the operating window (61) rotates to a position corresponding to the zero scale position of the balancing machine.
5. The electric motor according to claim 3, characterized in that The cover plate (6) is non-rotatable; the at least one operating window (61) is an operating window, and when the motor is positioned on the balancing machine according to a balancing adjustment direction, the position of the operating window (61) corresponds to the zero scale position of the balancing machine.
6. The electric motor according to claim 3, characterized in that The cover plate (6) is non-rotatable; the at least one operating window (61) is two operating windows, each operating window comprising a first window area (611) corresponding to the zero scale position of the balancing machine when the motor is positioned on the balancing machine according to a first balancing adjustment direction, and a second window area (612) corresponding to the zero scale position of the balancing machine when the motor is positioned on the balancing machine according to a second balancing adjustment direction.
7. The electric motor according to any one of claims 1 to 6, characterized in that The fixing element (51) is a torque arm, or a flange of the housing of the optical encoder (5), or comprises two supporting arms extending from the housing of the optical encoder (5).
8. A machine tool, characterized in that: Comprising an electric motor according to any one of claims 1 to 7.