Prism motor

Abstract

The utility model belongs to the technical field of laser scanning processing, and relates to a prism motor which comprises a motor assembly and a prism. The motor assembly comprises a stator, an inner rotating shaft and an outer rotating shaft, the stator is provided with a central through hole in the axial direction, and the inner rotating shaft is rotationally arranged in the central through hole; the outer rotating shaft is sleeved on the stator, is connected with the inner rotating shaft and synchronously rotates relative to the stator; an installation cavity is formed in the prism, at least part of the outer rotating shaft is arranged in the installation cavity, the end of the outer rotating shaft abuts against the inner wall of the installation cavity, the end of the prism is connected with the outer rotating shaft through a fixing piece, and the prism and the outer rotating shaft rotate synchronously. According to the technical scheme provided by the invention, the integration degree of the prism and the motor assembly can be improved, the prism motor is miniaturized, and the use stability of the prism motor is improved.

Description

Technical Field

[0001] The present application relates to the technical field of laser scanning processing, and more specifically, to a prism motor. Background Art

[0002] In the prior art, a scanning device is a device that can perform repeated linear scanning of a laser, and the scanning device reflects the laser to a processing plane and moves the laser on the processing plane. Most scanning devices use a prism to reflect and scan the laser, and the prism is driven by a motor.

[0003] The motor in the existing scanning device usually extends one end of the motor shaft to achieve the installation and positioning of the prism, which easily causes a waste of space and increases the size of the prism motor; at the same time, the prism load is loaded on the outside of the motor in the axial direction, which will cause the motor shaft to become longer and the force to be unbalanced, causing the motor to wear faster and reducing the service life of the prism motor. Utility Model Content

[0004] The technical problem to be solved by the embodiments of the present application is that the structural design of the existing prism motor easily causes waste of space, resulting in a large overall size, and easily causes motor wear, thereby reducing the service life of the prism motor.

[0005] In order to solve the above technical problems, the embodiment of the present application provides a prism motor, which adopts the following technical solution:

[0006] A prism motor comprises a motor assembly and a prism;

[0007] The motor assembly comprises a stator, an inner rotating shaft and an outer rotating shaft, wherein the stator is provided with a central through hole along the axial direction, and the inner rotating shaft is rotatably mounted in the central through hole; the outer rotating shaft is sleeved on the stator, and the outer rotating shaft is connected to the inner rotating shaft and rotates synchronously with respect to the stator;

[0008] A mounting cavity is formed in the prism, the outer shaft is at least partially inserted into the mounting cavity, and the end of the outer shaft abuts against the inner wall of the mounting cavity. The end of the prism is connected to the outer shaft through a fixing member, and the prism rotates synchronously with the outer shaft.

[0009] Further, the prism includes a connecting portion and a reflecting portion;

[0010] The inner side of the connecting portion abuts against the end of the outer rotating shaft, and is connected to the outer rotating shaft through the fixing member;

[0011] The reflecting part is sleeved on the outer rotating shaft.

[0012] Furthermore, the reflecting part is at least one of a polygonal mirror, a tower mirror, and a wedge-shaped rotating mirror.

[0013] Furthermore, a central axis is provided at one end of the inner rotating shaft close to the prism, and the outer rotating shaft is at least partially sleeved on the central axis.

[0014] Furthermore, a positioning block is provided on one side of the outer shaft facing the prism;

[0015] The connection portion is provided with a positioning hole of matching shape at a position corresponding to the positioning block;

[0016] The central axis, the positioning block and the positioning hole are coaxially arranged.

[0017] Furthermore, a positioning groove is provided on the outer side wall of the outer rotating shaft, and an elastic positioning piece matching the positioning groove is provided on the inner wall of the reflecting part.

[0018] Furthermore, the stator is provided with at least two limiting grooves, and the motor assembly further comprises at least two bearings, the bearings are rotatably mounted in the corresponding limiting grooves, and are installed between the stator and the outer rotating shaft.

[0019] Furthermore, the number of the bearings is two, and the two bearings are respectively arranged at two ends of the stator.

[0020] Furthermore, a flange fixing seat is provided at one end of the stator away from the prism.

[0021] Furthermore, a guide installation groove is provided on the flange fixing seat, and at least one end of the guide installation groove extends radially out of the flange fixing seat.

[0022] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0023] The prism motor provided in the present application reduces the overall weight of the prism by forming an installation cavity inside the prism that cooperates with the outer rotating shaft. At the same time, the setting of the installation cavity enables the outer rotating shaft to be at least partially placed in the installation cavity, thereby improving the degree of integration when the prism and the motor assembly are assembled, thereby reducing the overall size of the prism motor; by placing the outer rotating shaft in the installation cavity as the bearing structure of the prism, the weight of the prism can be evenly distributed on the outer rotating shaft, so that the force on the outer rotating shaft is balanced, which reduces the wear of the rotating shaft and increases the service life of the motor assembly; in addition, because the installation cavity is arranged on the inner side of the prism, when the motor assembly drives the prism to rotate at high speed, wind resistance and wind noise caused by the surface holes are avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the scheme of the present application, a brief introduction is given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 is a schematic structural diagram of a prism motor according to an embodiment of the present application;

[0026] Figure 2 is a schematic structural diagram of the prism motor in another direction of an embodiment of the present application;

[0027] Figure 3 is a cross-sectional schematic diagram of a prism motor according to an embodiment of the present application;

[0028] Figure 4 is an exploded schematic diagram of a prism motor according to an embodiment of the present application;

[0029] Figure 5 It is an exploded schematic diagram of the motor assembly of an embodiment of the present application.

[0030] Reference numerals:

[0031] 1. Motor assembly; 11. Stator; 111. Flange fixing seat; 112. Guide mounting groove; 12. Inner rotating shaft; 121. Center shaft; 13. Outer rotating shaft; 131. Positioning block; 132. Positioning groove; 14. Bearing; 2. Prism; 21. Connecting part; 211. Positioning hole; 22. Reflecting part. DETAILED DESCRIPTION

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0033] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0034] The existing prism motor usually extends the motor shaft to a certain length to facilitate the positioning and installation of the prism. The prism is driven to rotate by controlling the rotation of the motor shaft, thereby realizing high-speed marking surface scanning. Since the extension section of the motor shaft extends beyond the original stator length, it will cause a waste of space, and after the prism is installed, it will cause unbalanced force. After a period of use, the weight of the prism will cause the motor shaft to wear faster and reduce its service life, thereby increasing the disturbance force during the operation of the prism motor, making the prism motor unstable, and resulting in poor quality of high-speed marking surface scanning. At the same time, in order to reduce the weight of the prism, the existing prism motor will choose to hollow out the non-working end face of the prism to reduce the weight, which will cause the surface of the prism to be uneven or have holes, which will cause wind resistance and wind noise during the operation of the prism motor, affecting the quality of high-speed marking surface scanning.

[0035] Based on the defects of the above-mentioned prior art, an embodiment of the present application provides a prism motor, whose structural setting can reduce the overall size of the prism motor and can evenly distribute the weight of the prism on the outer shaft, so that the force at various locations on the outer shaft is balanced, reducing the degree of wear on the inner shaft and the outer shaft, and improving the service life of the prism motor.

[0036] See also Figure 1 , Figure 2 As shown, the prism motor provided in the embodiment of the present application includes a motor assembly 1 and a prism 2.

[0037] See also Figure 3 , Figure 5 As shown, in some embodiments, the motor assembly 1 includes a stator 11, an inner rotating shaft 12 and an outer rotating shaft 13. In this embodiment, the motor assembly 1 as a whole is positioned and installed on a work surface (not shown in the figure) through the stator 11. The stator 11 is axially provided with a central through hole, and the inner rotating shaft 12 is rotatably installed in the central through hole; the outer rotating shaft 13 is mounted on the stator 11, and the end of the outer rotating shaft 13 is connected to the end of the inner rotating shaft 12.

[0038] In this embodiment, at least one limit bearing (not shown in the figure) is provided in the central through hole, and the inner rotating shaft 12 cooperates with the limit bearing to achieve rotation in the central through hole. The inner rotating shaft 12 rotates to drive the outer rotating shaft 13 to rotate synchronously relative to the stator 11.

[0039] A mounting cavity is formed in the prism 2, the outer shaft 13 is at least partially inserted into the mounting cavity, and the end of the outer shaft 13 is against the inner wall of the mounting cavity. The end of the prism 2 is connected to the outer shaft 13 via a fixing member, and the prism 2 rotates synchronously with the outer shaft 13.

[0040] The prism motor provided in the embodiment of the present application reduces the overall weight of the prism 2 by forming an installation cavity that cooperates with the outer rotating shaft 13 in the prism 2. At the same time, the setting of the installation cavity enables the outer rotating shaft 13 to be at least partially placed in the installation cavity, which improves the degree of integration when the prism 2 and the motor assembly 1 are assembled, thereby reducing the overall size of the prism 2 motor; by placing the outer rotating shaft 13 in the installation cavity as the bearing structure of the prism 2, the weight of the prism 2 can be evenly distributed on the outer rotating shaft 13, so that the force on the outer rotating shaft 13 is balanced, which reduces the wear of the rotating shaft and increases the service life of the motor assembly 1; in addition, because the installation cavity is arranged on the inner side of the prism 2, when the motor assembly 1 drives the prism 2 to rotate at high speed, wind resistance and wind noise caused by the surface holes are avoided.

[0041] See also Figure 1 to Figure 4 As shown, in some embodiments, the prism 2 includes a connecting portion 21 and a reflecting portion 22 , and the inner side of the connecting portion 21 and the inner wall of the reflecting portion 22 form the mounting cavity.

[0042] In this embodiment, a plurality of threaded holes are provided on the connecting portion 21 and at corresponding positions of the end of the outer shaft 13. When the outer shaft 13 is placed in the mounting cavity, the inner side of the connecting portion 21 abuts against the end of the outer shaft 13, and a plurality of fixing bolts pass through the threaded holes on the connecting portion 21 and the threaded holes at the end of the outer shaft 13 in sequence, so that the end of the outer shaft 13 is fixedly connected to the connecting portion 21.

[0043] In this embodiment, when the connecting portion 21 is fixedly connected to the end of the outer shaft 13, the reflecting portion 22 is sleeved on the outer shaft 13. Figure 1 to Figure 3 shown.

[0044] The embodiment of the present application fixes the connection portion 21 to the end of the outer shaft 13 so that the prism 2 can be completely mounted on the outer shaft 13 during installation, thereby improving the integration level of the prism motor. At the same time, the contact area between the reflection portion 22 and the outer shaft 13 can be increased so that the weight of the prism 2 can be evenly distributed on the outer shaft 13.

[0045] In some embodiments, the reflecting portion 22 is at least one of a polygonal prism, a tower mirror, and a wedge-shaped rotating mirror. In this embodiment, the reflecting portion 22 is an octagonal prism. In other embodiments, the reflecting portion 22 can be a triangular prism, a quadrangular prism, a pentaprism, a hexagonal prism, or even a prism with more faces.

[0046] See also Figure 3 , Figure 5As shown, in some embodiments, a central axis 121 is provided at one end of the inner rotating shaft 12 close to the prism 2, and the outer rotating shaft 13 is at least partially mounted on the central axis 121 to achieve the connection between the outer rotating shaft 13 and the inner rotating shaft 12. When the inner rotating shaft 12 rotates relative to the stator 11, the inner rotating shaft 12 drives the outer rotating shaft 13 to rotate relative to the stator 11.

[0047] See also Figure 1 , Figure 3 , Figure 4 As shown, in some embodiments, a positioning block 131 is provided on the side of the outer shaft 13 facing the prism 2; the connecting portion 21 is provided with a positioning hole 211 of matching shape at the position corresponding to the positioning block 131. The embodiment of the present application achieves the positioning installation of the prism 2 through the cooperation between the positioning block 131 and the positioning hole 211, thereby improving the installation efficiency of the prism motor.

[0048] In this embodiment, the central axis 121, the positioning block 131 and the positioning hole 211 are coaxially arranged. Figure 3 shown.

[0049] In the embodiment of the present application, the central axis 121, the positioning block 131 and the positioning hole 211 are coaxially arranged to improve the working stability of the prism motor and the quality of high-speed scribing surface scanning.

[0050] See also Figure 4 , Figure 5 As shown, in some embodiments, a positioning groove 132 is provided on the outer wall of the outer rotating shaft 13. In this embodiment, an inner wall of the reflecting portion 22 is provided with an elastic positioning member (not shown in the figure) matching the positioning groove 132. When the outer rotating shaft 13 is placed in the installation cavity, the elastic positioning member is placed in the positioning groove 132, thereby realizing the positioning installation between the prism 2 and the motor assembly 1.

[0051] In other embodiments, before the outer shaft 13 is placed in the installation cavity, glue may be applied in the positioning groove 132 . When the outer shaft 13 is placed in the installation cavity, the prism 2 and the motor assembly 1 are fixedly installed by applying glue.

[0052] See also Figure 3 , Figure 5 As shown, in some embodiments, at least two limit grooves (not shown in the figure) are provided on the stator 11, and the motor assembly 1 also includes at least two bearings 14, which are rotatably installed in the corresponding limit grooves and installed between the stator 11 and the outer rotating shaft 13.

[0053] In this embodiment, there are two bearings 14, which are respectively arranged at both ends of the stator 11. When the prism 2 is installed on the motor assembly 1, the weight of the prism 2 is evenly distributed on the outer shaft 13, and the weight borne by the outer shaft 13 is evenly distributed on the bearings 14 at both ends, so that the forces at both ends of the outer shaft 13 are balanced, which reduces the wear of the shaft and increases the service life of the motor assembly 1.

[0054] In other embodiments, when the number of the bearings 14 is greater than two, at least two bearings 14 are respectively arranged at two ends of the stator 11, and the remaining bearings 14 are equidistantly arranged between the bearings 14 at the two ends, so as to achieve the effect of evenly bearing the weight.

[0055] In other embodiments, the motor assembly 1 also includes a bearing pressure plate (not shown in the figure), which is fixed to the end of the stator 11 by fixing bolts or is sleeved on the stator 11 by gluing, and the bearing pressure plate is used to limit the bearing 14 from escaping from the limit groove.

[0056] See also Figure 2 to Figure 4 As shown, in some embodiments, a flange fixing seat 111 is provided at one end of the stator 11 away from the prism 2, wherein the flange fixing seat 111 is provided with a plurality of threaded holes, and the flange fixing seat 111 is installed on a work surface (not shown in the figure), and fixing bolts pass through the threaded holes to fix the motor assembly 1 as a whole on the work surface.

[0057] In some embodiments, a guide installation groove 112 is provided on the flange fixing seat 111, and at least one end of the guide installation groove 112 extends radially out of the flange fixing seat 111. In this embodiment, the guide installation groove 112 extends radially downward out of the flange fixing seat 111, and the guide installation groove 112 is arch-shaped.

[0058] In the embodiment of the present application, a guide installation groove 112 is provided on the flange fixing seat 111 , which plays a guiding and positioning role when the motor assembly 1 is installed on a work surface, thereby improving the assembly efficiency of the motor assembly 1 .

[0059] Obviously, the embodiments described above are only some embodiments of the present application, rather than all embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to perform equivalent replacement of some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of this application, directly or indirectly used in other related technical fields, is similarly within the scope of patent protection of this application.

Claims

1. A prism motor, characterized in that: Including a motor assembly and a prism; The motor assembly comprises a stator, an inner rotating shaft and an outer rotating shaft, wherein the stator is provided with a central through hole along the axial direction, and the inner rotating shaft is rotatably mounted in the central through hole; the outer rotating shaft is sleeved on the stator, and the outer rotating shaft is connected to the inner rotating shaft and rotates synchronously with respect to the stator; A mounting cavity is formed in the prism, the outer shaft is at least partially inserted into the mounting cavity, and the end of the outer shaft abuts against the inner wall of the mounting cavity. The end of the prism is connected to the outer shaft through a fixing member, and the prism rotates synchronously with the outer shaft.

2. The prism motor according to claim 1, characterized in that: The prism includes a connecting portion and a reflecting portion; The inner side of the connecting portion abuts against the end of the outer rotating shaft, and is connected to the outer rotating shaft through the fixing member; The reflecting part is sleeved on the outer rotating shaft.

3. The prism motor according to claim 2, characterized in that: The reflecting part is at least one of a polygonal mirror, a tower mirror, and a wedge-shaped rotating mirror.

4. The prism motor according to claim 2, characterized in that: The inner rotating shaft is provided with a central shaft at one end close to the prism, and the outer rotating shaft is at least partially sleeved on the central shaft.

5. The prism motor according to claim 4, characterized in that: A positioning block is provided on one side of the outer rotating shaft facing the prism; The connection portion is provided with a positioning hole of matching shape at a position corresponding to the positioning block; The central axis, the positioning block and the positioning hole are coaxially arranged.

6. The prism motor according to claim 2, characterized in that: A positioning groove is provided on the outer side wall of the outer rotating shaft, and an elastic positioning piece matching the positioning groove is provided on the inner wall of the reflecting part.

7. The prism motor according to claim 1, characterized in that: The stator is provided with at least two limiting grooves, and the motor assembly further comprises at least two bearings, which are rotatably mounted in the corresponding limiting grooves and are located between the stator and the outer rotating shaft.

8. The prism motor according to claim 7, characterized in that: The number of the bearings is two, and the two bearings are respectively arranged at two ends of the stator.

9. The prism motor according to claim 1, characterized in that: A flange fixing seat is provided at one end of the stator away from the prism.

10. The prism motor according to claim 9, characterized in that: The flange fixing seat is provided with a guide installation groove, and at least one end of the guide installation groove extends radially out of the flange fixing seat.

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