Servo motor housing, servo motor housing processing method and servo motor

Abstract

The present invention discloses a servo motor housing, a servo motor housing processing method and a servo motor. The servo motor housing includes a housing body, the housing body forms an inner cavity, and a plurality of silencer columns are formed at intervals on the cavity wall of the inner cavity, and the silencer columns are all extended along the axis direction of the motor; a first silencer hole and a second silencer hole are provided on the silencer column, one end of the first silencer hole is provided on the top wall of the silencer column facing the inner cavity, the other end of the first silencer hole extends into the silencer column, and the second silencer hole extends from the other end of the first silencer hole to the side wall of the silencer column. By providing the first silencer hole on the top wall of the silencer column and extending it into the silencer column, high-frequency sound waves are reflected multiple times in the hole, and high-frequency noise is effectively attenuated; the second silencer hole is used to extend the first silencer hole from the horizontal direction, so that low-frequency noise can be reflected and scattered multiple times in the silencer column, so that the energy is rapidly attenuated, thereby effectively attenuating the low-frequency noise, so that the present application has the advantage of low noise.

Description

Technical Field

[0001] The present invention relates to the technical field of motor housing structures, and in particular to a servo motor housing, a servo motor housing processing method and a servo motor. Background Art

[0002] As automation technology becomes more mature, the application of motors is becoming more extensive. Among them, servo motors have the advantages of high precision, high efficiency, fast response and strong stability. They are suitable for CNC machine tools, automated production lines, aerospace equipment, new energy vehicles, medical equipment and other fields. However, for new energy vehicles, medical equipment and other scenarios, the noise caused by the servo motor during operation is also required to be as low as possible to improve the user experience.

[0003] At present, most of the noise of servo motors comes from inside the motor. One part is the high-frequency electromagnetic noise caused by the rotation of the rotor, and the other part is the low-frequency noise caused by the vibration of the servo motor when it is working. In this regard, the noise reduction measures for servo motors include adding vibration reduction structures, optimizing winding design, improving stators and rotors, etc. Among them, adding vibration reduction structures refers to adding vibration reduction structures such as rubber pads to the connection structure of the servo motor to reduce vibration transmission, thereby indirectly reducing low-frequency noise, but it is difficult to eliminate the high-frequency noise of the servo motor itself; although optimizing winding design, improving stators and rotors, etc., can reduce the high-frequency noise generated inside the servo motor, high-frequency noise still exists and it is difficult to eliminate low-frequency noise. Summary of the invention

[0004] The object of the present invention is to provide a servo motor housing, a servo motor housing processing method and a servo motor, so as to solve the technical problem that the high-frequency noise and low-frequency noise of the servo motor are difficult to effectively reduce in the prior art.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A servo motor housing comprises a housing body, wherein the housing body is formed with an inner cavity, a plurality of silencer columns are formed at intervals on the cavity wall of the inner cavity, and the silencer columns are all extended along the axis direction of the motor;

[0007] The silencer column is provided with a first silencer hole and a second silencer hole, one end of the first silencer hole is arranged on the top wall of the silencer column facing the inner cavity, the other end of the first silencer hole extends into the silencer column, and the second silencer hole extends from the other end of the first silencer hole to the side wall of the silencer column.

[0008] Optionally, the muffler column forms at least two side walls, one of which faces the muffler column on one side, and the other side wall faces the muffler column on the other side;

[0009] The first sound-absorbing hole is connected to second sound-absorbing holes corresponding in number to the side wall, and the second sound-absorbing holes extend from the other end of the first sound-absorbing hole to the corresponding side wall.

[0010] Optionally, the first silencer hole is connected to the second silencer hole which is in communication with the first silencer hole to form a silencer portion; and the silencer column has a plurality of groups of the silencer portions spaced apart along the axial direction.

[0011] Optionally, between two adjacent silencer columns, along the axial direction, the silencer portion on one silencer column and the silencer portion on the other silencer column are alternately arranged.

[0012] Optionally, the silencer column is provided with a through hole along the axial direction, and the through hole passes through the intersection of the first silencer hole and the second silencer hole; and a noise reduction filler is filled in the through hole between the two silencer parts.

[0013] Optionally, there are two side walls, and the top wall is connected between the two side walls; the distance between the two side walls increases in a direction away from the top wall.

[0014] Optionally, the silencer column and the shell body are integrally formed or glued together.

[0015] A servo motor housing processing method is used to prepare the servo motor housing as described above, and the servo motor housing processing method comprises:

[0016] Forming a shell body with a silencer column;

[0017] A through hole is opened along the axial direction of the muffler column, and a first muffler hole and a second muffler hole are formed outwardly from the hole wall of the through hole by laser processing.

[0018] A servo motor housing processing method is used to prepare the servo motor housing as described above, and the servo motor housing processing method comprises:

[0019] Molded shell body and silencer column;

[0020] The silencer column is machined to form a first silencer hole and a second silencer hole on the silencer column;

[0021] The silencer column is glued to the cavity wall of the inner cavity.

[0022] A servo motor comprises the servo motor housing as described above, or a servo motor housing formed by the servo motor housing processing method as described above.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The servo motor housing, servo motor housing processing method and servo motor provided by the present invention increase the propagation path of sound waves by opening a first silencer hole on the top wall of the silencer column and extending it into the silencer column, so that high-frequency sound waves are reflected multiple times in the hole, increasing their energy loss, thereby effectively attenuating high-frequency noise; at the same time, the second silencer hole is used to extend the first silencer hole from the horizontal direction, so that low-frequency noise can be reflected and scattered multiple times in the silencer column, so that the energy is rapidly attenuated, thereby effectively attenuating low-frequency noise. Therefore, the servo motor housing, servo motor housing processing method and servo motor in the present invention can effectively reduce low-frequency noise and high-frequency noise, and optimize the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0026] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention.

[0027] Figure 1 A schematic diagram of the overall structure of a servo motor provided in an embodiment of the present invention;

[0028] Figure 2 A schematic diagram of the overall structure of a servo motor housing provided in an embodiment of the present invention;

[0029] Figure 3 A schematic diagram of a first cross-sectional structure of a servo motor housing provided in an embodiment of the present invention;

[0030] Figure 4 for Figure 3 A schematic diagram of the cross-sectional structure at point A;

[0031] Figure 5 A schematic diagram of a second cross-sectional structure of a servo motor housing provided in an embodiment of the present invention;

[0032] Figure 6 for Figure 5 A schematic diagram of the cross-sectional structure at point B;

[0033] Figure 7A schematic diagram of the processing principle of a servo motor housing provided by an embodiment of the present invention;

[0034] Illustrations: 100, shell body; 101, inner cavity; 200, silencer column; 201, top wall; 202, side wall; 210, first silencer hole; 220, second silencer hole; 230, through hole; 300, protective shell; 400, motor shaft; 500, laser source; 600, lens. DETAILED DESCRIPTION

[0035] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally arranged component at the same time.

[0037] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0038] like Figures 1 to 7 As shown, Figure 1 The overall structural diagram of the servo motor provided by the embodiment of the present invention is as follows: Figure 2 The overall structural diagram of the servo motor housing provided by the embodiment of the present invention is as follows: Figure 3 A schematic diagram of a first cross-sectional structure of a servo motor housing provided in an embodiment of the present invention, Figure 4 for Figure 3 Schematic diagram of the cross-section structure at point A, Figure 5 A second cross-sectional structural diagram of a servo motor housing provided in an embodiment of the present invention, Figure 6 for Figure 5 Schematic diagram of the cross-section structure at point B, Figure 7 A schematic diagram of the processing principle of a servo motor housing provided in an embodiment of the present invention.

[0039] Embodiment 1:

[0040] The present embodiment provides a servo motor housing, which is suitable for scenarios with high requirements for noise reduction, such as new energy vehicles and medical equipment. For example, it can be used as the power structure of a hidden door handle of a new energy vehicle, the power structure of a window lifting structure, the power structure of a surgical robot arm, etc. In the present embodiment, the noise reduction capability of the servo motor is enhanced by optimizing the servo motor housing, and it also has the advantages of compact structure and can be compactly embedded in a vehicle body.

[0041] like Figures 1 to 6 As shown, the servo motor housing in this embodiment includes a protective shell 300, a shell body 100 and a motor shaft 400. The shell body 100 should be provided with a winding, a stator, a rotor (not shown) and other conversion structures capable of converting electrical energy into kinetic energy. The motor shaft 400 is used as the output end of the above conversion structure. The shell body 100 is formed with an inner cavity 101, and a plurality of silencer columns 200 are formed at intervals on the cavity wall of the inner cavity 101. The silencer columns 200 are all extended along the axial direction of the motor, and the axial direction is the extension direction of the motor shaft 400.

[0042] Specifically, the muffler column 200 is provided with a first muffler hole 210 and a second muffler hole 220. One end of the first muffler hole 210 is arranged on the top wall 201 of the muffler column 200 facing the inner cavity 101, the other end of the first muffler hole 210 extends into the muffler column 200, and the second muffler hole 220 extends from the other end of the first muffler hole 210 to the side wall 202 of the muffler column 200. For high-frequency noise, its wavelength is relatively short, and the energy of the high-frequency noise is attenuated directly by the arrangement of the first muffler hole 210. For low-frequency noise, its wavelength is relatively long, and the reflection and scattering effect of the first muffler hole 210 on it is limited, that is, the energy attenuation effect of the low-frequency noise is limited. After the second muffler hole 220 is extended horizontally, the propagation path and complexity of the sound wave are increased, so that the low-frequency sound wave is reflected and scattered multiple times in the muffler column 200, and the energy is rapidly attenuated, thereby effectively attenuating the low-frequency noise.

[0043] It can be understood that, for the muffler column 200, it has at least one non-linear hole structure to increase the noise reduction ability of the shell body 100; specifically, by opening the first muffler hole 210 on the top wall 201 of the muffler column 200 and extending it into the muffler column 200, the propagation path of the sound wave is increased, so that the high-frequency sound wave is reflected multiple times in the first muffler hole 210, increasing its energy loss, thereby effectively attenuating the high-frequency noise; at the same time, the second muffler hole 220 is used to extend the first muffler hole 210 from the horizontal direction, so that the low-frequency noise can be reflected and scattered multiple times in the muffler column 200, so that the energy is rapidly attenuated, thereby effectively attenuating the low-frequency noise. Therefore, the servo motor housing in this embodiment can effectively reduce low-frequency noise and high-frequency noise, and optimize the user experience.

[0044] Furthermore, if Figures 3 to 6 As shown, the muffler column 200 forms at least two side walls 202, one of which faces the muffler column 200 on one side, and the other side wall 202 faces the muffler column 200 on the other side; the first muffler hole 210 is connected with the second muffler holes 220 corresponding to the number of the side walls 202, and the second muffler holes 220 extend from the other end of the first muffler hole 210 to the corresponding side wall 202, that is, the first muffler hole 210 extends a plurality of second muffler holes 220, and each second muffler hole 220 correspondingly extends to the corresponding side wall 202. By constructing a structure of a plurality of second muffler holes 220, the number of reflections and scatterings of sound waves during propagation is increased, so as to improve the noise attenuation effect.

[0045] As a preferred embodiment, the cross-section of the silencer column 200 is trapezoidal, the number of side walls 202 is two, and the top wall 201 is connected between the two side walls 202; the spacing between the two side walls 202 increases in the direction away from the top wall 201, and has the advantages of compact structure, simple structure, easy processing, and good noise attenuation effect.

[0046] As other optional implementations, the silencer column 200 may be in other shapes such as a hexagon or an octagon, and a corresponding number of side walls 202 may be formed accordingly to improve the noise attenuation effect.

[0047] On the basis of the above preferred embodiment, the first muffler hole 210 is connected to the second muffler hole 220 to form a muffler; the muffler column 200 is provided with multiple groups of mufflers at intervals along the axial direction. By forming multiple groups of mufflers, the reflection, scattering and absorption effects of sound waves are enhanced, and the resonance path of single-frequency sound waves is reduced, and the occurrence of resonance effect is reduced, thereby reducing the vibration of the shell body 100.

[0048] Furthermore, between two adjacent silencer columns 200, along the axial direction, the silencer portion on one silencer column 200 is alternately arranged with the silencer portion on the other silencer column 200. Thus, an irregular noise propagation path is formed, and the noise sound waves after energy attenuation will reach the unopened part of the side wall 201 of the adjacent silencer column 200, playing the final role of noise absorption.

[0049] Furthermore, the muffler column 200 is provided with a through hole 230 along the axial direction, and the through hole 230 passes through the intersection of the first muffler hole 210 and the second muffler hole 200; a noise reduction filler is filled between the two muffler parts in the through hole 230. It is understandable that the noise reduction filler can be a rubber block, a sound insulation cotton block, etc. On the one hand, it plays a role in separating the muffler parts to avoid resonance between the muffler parts. At the same time, when the noise sound wave after energy attenuation reaches the unopened part of the side wall 201 of the adjacent muffler column 200, the noise reduction filler can play the final noise attenuation role. The above arrangement has the advantage of compact structure.

[0050] In an optional embodiment, the silencer column 200 is integrally formed with the shell body 100. Specifically, the inner cavity 101 can be processed by laser processing to form the first silencer hole 210 and the second silencer hole 220, or can be glued together.

[0051] As another optional implementation, the silencer column 200 and the shell body 100 are formed separately, and then the silencer column 200 is installed on the shell body 100 by gluing. In order to strengthen the connection between the two, a positioning groove can be pre-opened in the inner cavity 101 for positioning the silencer column 200.

[0052] Embodiment 2:

[0053] The servo motor housing processing method provided in this embodiment is used to prepare the servo motor housing in the first embodiment. The silencer column 200 of the servo motor housing is integrally formed with the housing body 100. The servo motor housing processing method includes:

[0054] S110, forming a shell body 100 provided with a muffler column 200;

[0055] The molding method includes but is not limited to casting, injection molding, CNC processing, etc., and can form a shell body 100 with a muffler column (without opening);

[0056] S120 , a through hole 230 is opened along the axial direction of the muffler column 200 , and a first muffler hole 210 and a second muffler hole 220 are formed outwardly from the hole wall of the through hole 230 by laser processing.

[0057] The method of opening the through hole 230 includes but is not limited to deep hole drilling, milling, etc. The principle of laser processing is as follows: Figure 7 As shown, a lens 600 with a reflective shape extends from the lower end of the through hole 230, and a laser is irradiated from the upper end of the through hole 230 by a laser source 500. Through the reflection of the lens 600, a first silencer hole 210 and a second silencer hole 220 are opened on the side wall of the through hole 230, which can make the shell body 100 more compact as a whole and reduce the vibration existing when the servo motor is working.

[0058] S130 , inserting noise reduction fillers into the through holes 230 in sequence and at preset intervals.

[0059] It can be understood that, for the muffler column 200, it has at least one non-linear hole structure to increase the noise reduction ability of the shell body 100; specifically, by opening the first muffler hole 210 on the top wall 201 of the muffler column 200 and extending it into the muffler column 200, the propagation path of the sound wave is increased, so that the high-frequency sound wave is reflected multiple times in the first muffler hole 210, increasing its energy loss, thereby effectively attenuating the high-frequency noise; at the same time, the second muffler hole 220 is used to extend the first muffler hole 210 from the horizontal direction, so that the low-frequency noise can be reflected and scattered multiple times in the muffler column 200, so that the energy is rapidly attenuated, thereby effectively attenuating the low-frequency noise. Therefore, the servo motor housing processing method in this embodiment can effectively reduce low-frequency noise and high-frequency noise, and optimize the user experience.

[0060] Embodiment three:

[0061] The servo motor housing processing method provided in this embodiment is used to prepare the servo motor housing in the first embodiment. The silencer column 200 and the housing body 100 of the servo motor housing are formed separately and then connected by glue. The servo motor housing processing method includes:

[0062] S210, forming the shell body 100 and the muffler column 200;

[0063] The molding method includes but is not limited to casting, injection molding, CNC processing, etc., which can form the silencer column (without opening) and the shell body 100;

[0064] S220, machining the silencer column 200 to open a first silencer hole 210 and a second silencer hole 220 on the silencer column 200; at the same time, opening a through hole 230 on the silencer column 200 for positioning the first silencer hole 210 and the second silencer hole 220;

[0065] S230, gluing the muffler column 200 to the cavity wall of the inner cavity 101;

[0066] S240 , inserting noise reduction fillers into the through holes 230 in sequence and at preset intervals.

[0067] It can be understood that, for the muffler column 200, it has at least one non-linear hole structure to increase the noise reduction ability of the shell body 100; specifically, by opening the first muffler hole 210 on the top wall 201 of the muffler column 200 and extending it into the muffler column 200, the propagation path of the sound wave is increased, so that the high-frequency sound wave is reflected multiple times in the first muffler hole 210, increasing its energy loss, thereby effectively attenuating the high-frequency noise; at the same time, the second muffler hole 220 is used to extend the first muffler hole 210 from the horizontal direction, so that the low-frequency noise can be reflected and scattered multiple times in the muffler column 200, so that the energy is rapidly attenuated, thereby effectively attenuating the low-frequency noise. Therefore, the servo motor housing processing method in this embodiment can effectively reduce low-frequency noise and high-frequency noise, and optimize the user experience.

[0068] Embodiment 4:

[0069] The servo motor in this embodiment includes the servo motor housing in the first embodiment, or a servo motor housing formed by the servo motor housing processing method in the second embodiment or the third embodiment. The servo motor has the advantages of the servo motor housing or the servo motor housing processing method, making the servo motor more compact and less noisy.

[0070] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A servo motor housing, characterized in that: It comprises a shell body (100), wherein the shell body (100) is formed with an inner cavity (101), a plurality of silencer columns (200) are formed at intervals on the cavity wall of the inner cavity (101), and the silencer columns (200) are all extended along the axis direction of the motor; The muffler column (200) is provided with a first muffler hole (210) and a second muffler hole (220); one end of the first muffler hole (210) is arranged on a top wall (201) of the muffler column (200) facing the inner cavity (101); the other end of the first muffler hole (210) extends into the muffler column (200); and the second muffler hole (220) extends from the other end of the first muffler hole (210) to a side wall (202) of the muffler column (200); The muffler column (200) forms at least two side walls (202), wherein one of the side walls (202) faces the muffler column (200) on one side, and the other side wall (202) faces the muffler column (200) on the other side; The first sound-absorbing holes (210) are connected to second sound-absorbing holes (220) corresponding in number to the side wall (202), and the second sound-absorbing holes (220) extend from the other end of the first sound-absorbing holes (210) to the corresponding side wall (202).

2. A servo motor housing according to claim 1, characterized in that: The first silencer hole (210) is connected to the second silencer hole (220) to form a silencer portion; the silencer column (200) is provided with a plurality of groups of the silencer portions at intervals along the axial direction.

3. A servo motor housing according to claim 2, characterized in that: Between two adjacent silencer columns (200), along the axial direction, the silencer portion on one silencer column (200) and the silencer portion on the other silencer column (200) are arranged alternately.

4. A servo motor housing according to claim 2, characterized in that: The silencer column (200) is provided with a through hole (230) along the axial direction, the through hole (230) passing through the intersection of the first silencer hole (210) and the second silencer hole (220); the through hole (230) is filled with a noise reduction filler between the two silencer parts.

5. The servo motor housing according to claim 1, characterized in that: The number of the side walls (202) is two, and the top wall (201) is connected between the two side walls (202); the distance between the two side walls (202) increases in a direction away from the top wall (201).

6. A servo motor housing according to any one of claims 1 to 5, characterized in that: The silencer column (200) and the shell body (100) are integrally formed or glued together.

7. A servo motor housing processing method, characterized in that: For preparing a servo motor housing according to any one of claims 1 to 5, the servo motor housing processing method comprises: Forming a shell body (100) provided with a muffler column (200); A through hole (230) is opened along the axial direction of the muffler column (200), and a first muffler hole (210) and a second muffler hole (220) are formed by laser processing from the hole wall of the through hole (230) outwards.

8. A servo motor housing processing method, characterized in that: For preparing a servo motor housing according to any one of claims 1 to 7, the servo motor housing processing method comprises: A molded shell body (100) and a muffler column (200); Machining the silencer column (200) to form a first silencer hole (210) and a second silencer hole (220) on the silencer column (200); The silencer column (200) is glued to the cavity wall of the inner cavity (101).

9. A servo motor, characterized in that: It comprises a servo motor housing as described in any one of claims 1 to 6, or a servo motor housing formed by the servo motor housing processing method as described in claim 7 or 8.

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