Noise reduction structure of car window lifting motor

Abstract

The invention relates to the technical field of car window lifting motors, in particular to a noise reduction structure of a car window lifting motor, which comprises a motor body, a transmission assembly and a bearing combination, and is characterized in that the motor body comprises a gear box, a motor shell and a small shell, and the small shell is located at the joint of the gear box and the motor shell; the transmission assembly comprises a motor shaft, a worm gear and a worm, the worm is arranged on the motor shaft, and the worm is meshed with the worm gear; the bearing combination comprises two self-aligning ball rolling bearings and two oil-retaining bearings, one self-aligning ball rolling bearing is arranged at one end, deviating from the motor shell, of the gear box, the other self-aligning ball rolling bearing is arranged at one end, deviating from the gear box, of the motor shell, one oil-retaining bearing is located at the other end of the gear box, the other oil-retaining bearing is arranged on the small shell, and the motor shaft penetrates through the two oil-retaining bearings; according to the invention, the oil-retaining bearing is arranged at the middle section of the motor shaft, so that more supporting points are provided, the deformation of the motor shaft after being loaded is reduced, and the advantage of lower noise is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of car window lifting motor, more particularly to a noise reduction structure of car window lifting motor. BACKGROUND

[0002] The car window motor is a motor used for lifting the car window.

[0003] The patent document (CN211008153U) discloses a car window lifting motor. Figure 3 The car window lifting motor comprises a gear box, a motor shell, a small shell, a motor shaft, two rolling bearings and a fixed bearing. Figure 3 As can be seen from the description and drawings of the patent document, the car window lifting motor comprises a gear box, a motor shell, a small shell, a motor shaft, two rolling bearings and a fixed bearing, the small shell is located between the gear box and the motor shell, the two rolling bearings are respectively located at one end of the gear box and the motor shell away from each other, the two ends of the motor shaft respectively extend into the two rolling bearings, the fixed bearing is installed on the small shell, the motor shaft passes through the fixed bearing, and the fixed bearing is located at the middle segment of the motor shaft.

[0004] Therefore, there is a need to provide a noise reduction structure of car window lifting motor with lower noise. SUMMARY

[0005] The main purpose of the present application is to provide a noise reduction structure of car window lifting motor, wherein the noise reduction structure of car window lifting motor comprises a motor body, a transmission assembly and a bearing combination, the motor body comprises a gear box, a motor shell and a small shell, the small shell is located at the connection between the gear box and the motor shell; the transmission assembly comprises a motor shaft, a worm gear, a worm and an output shaft, the motor shaft is provided with a worm, the worm is engaged with the worm gear, and the output shaft is connected with the worm gear; the bearing combination comprises two aligning ball rolling bearings and two oil-containing bearings, one aligning ball rolling bearing is arranged at one end of the gear box away from the motor shell, the other aligning ball rolling bearing is arranged at one end of the motor shell away from the gear box, one oil-containing bearing is located at one end of the gear box close to the motor shell, the other oil-containing bearing is arranged on the small shell, the motor shaft passes through the two oil-containing bearings, and the two ends of the motor shaft respectively extend into the two aligning ball rolling bearings, and the two oil-containing bearings are both located at the middle segment of the motor shaft.

[0006] Another object of the present application is to provide a noise reduction structure of a car window lifting motor, wherein the noise reduction structure of the car window lifting motor further comprises an elastic compensation ring located between the motor shaft and the worm, the side wall of the motor shaft has a plurality of first protrusions, the inner side wall of the worm has a plurality of second protrusions, the outer side wall and the inner side wall of the elastic compensation ring have a plurality of first grooves and second grooves arranged alternately respectively, the first protrusions are clamped into the second grooves, and the second protrusions are clamped into the first grooves.

[0007] In order to achieve the above-mentioned at least one object of the present application, the present application provides a noise reduction structure of a car window lifting motor, wherein the noise reduction structure of the car window lifting motor comprises: a motor body comprising a gear box, a motor shell and a small shell located at the connection between the gear box and the motor shell; a transmission assembly comprising a motor shaft, a worm gear, a worm and an output shaft, the worm being arranged on the motor shaft, the worm being engaged with the worm gear, and the output shaft being connected with the worm gear; a bearing combination comprising two self-aligning ball bearings and two oil-containing bearings, one of the self-aligning ball bearings being arranged at one end of the gear box away from the motor shell, the other self-aligning ball bearing being arranged at one end of the motor shell away from the gear box, one of the oil-containing bearings being located at one end of the gear box close to the motor shell, the other oil-containing bearing being arranged on the small shell, the motor shaft penetrating through the two oil-containing bearings, and the two ends of the motor shaft extending into the two self-aligning ball bearings respectively, and the two oil-containing bearings being located at the middle section of the motor shaft.

[0008] In one or more embodiments of the present application, the noise reduction structure of the car window lifting motor further comprises an elastic compensation ring located between the motor shaft and the worm, the side wall of the motor shaft has a plurality of first protrusions, the inner side wall of the worm has a plurality of second protrusions, the outer side wall and the inner side wall of the elastic compensation ring have a plurality of first grooves and second grooves arranged alternately respectively, the first protrusions are clamped into the second grooves, and the second protrusions are clamped into the first grooves, and when the worm gear transmits force to the worm, the elastic compensation ring deforms in the radial direction and provides a compensation space.

[0009] In one or more embodiments of the present application, the noise reduction structure of the window lifting motor comprises an electromagnet, a distance sensor and a magnetic ring, the magnetic ring is sleeved on the motor shaft, the distance sensor is located directly below the motor shaft and is installed on the gear box, when the motor shaft is pressed to be concave and makes the measured data of the distance sensor less than a predetermined value, the electromagnet generates a magnetic pole opposite to the magnetic ring and provides a supporting force to the motor shaft.

[0010] In one or more embodiments of the present application, the first protrusion and the bottom wall of the second groove have a first receiving space, and the second protrusion and the bottom wall of the first groove have a second receiving space.

[0011] In one or more embodiments of the present application, the side wall of the elastic compensation ring has a plurality of filling grooves.

[0012] In one or more embodiments of the present application, the bearing combination further comprises a first bearing seat, the gear box has an extended cylinder near one end of the small shell, the extended cylinder has a counterbore, the first bearing seat is placed in the counterbore, the first bearing seat has a mounting groove away from one end of the small shell, an oil-containing bearing is arranged in the mounting groove, and the motor shaft passes through the first bearing seat.

[0013] In one or more embodiments of the present application, the noise reduction structure of the window lifting motor further comprises a stator permanent magnet, a rotor framework and a coil, the rotor framework is fixedly connected with the motor shaft, the coil is wound on the rotor framework, and the stator permanent magnet is fixedly installed on the motor shell and located outside the rotor framework.

[0014] In one or more embodiments of the present application, the outside of the extended cylinder has a plurality of ribs, and the ribs are fixedly connected with the gear box.

[0015] In the embodiments of the present application, the noise reduction structure of the window lifting motor comprises a motor body, a transmission assembly and a bearing combination, the motor body comprises a gear box, a motor shell and a small shell, the small shell is located at the connection between the gear box and the motor shell; the transmission assembly comprises a motor shaft, a worm gear, a worm and an output shaft, the worm is arranged on the motor shaft, the worm is engaged with the worm gear, and the output shaft is connected with the worm gear; the bearing combination comprises two self-aligning ball bearings and two oil-containing bearings, one self-aligning ball bearing is arranged at one end of the gear box away from the motor shell, the other self-aligning ball bearing is arranged at one end of the motor shell away from the gear box, one oil-containing bearing is located at one end of the gear box close to the motor shell, the other oil-containing bearing is arranged on the small shell, the motor shaft passes through the two oil-containing bearings, and the two ends of the motor shaft respectively extend into the two self-aligning ball bearings, and the two oil-containing bearings are both located at the middle section of the motor shaft, so that more supporting points are provided by arranging an oil-containing bearing at the middle section of the motor shaft, the deformation of the motor shaft under load is reduced, and the purpose of lower noise is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0016] These and / or other aspects and advantages of the application will become more apparent and more fully understood from the following detailed description, taken in conjunction with the accompanying drawings, in which: Figure 1 FIG. 1 illustrates a structural schematic diagram of a noise reduction structure of a vehicle window lifting motor according to an embodiment of the present application; Figure 2 FIG. 2 illustrates a structural schematic diagram of a worm and a motor shaft fitting place; Figure 3 FIG. 3 illustrates a partial enlarged view of C of FIG. 2; Figure 1 Figure 4 FIG. 4 illustrates a structural schematic diagram of a gear box from a certain perspective. DETAILED DESCRIPTION

[0017] The terms and words used in the following description and claims are not limited to the bibliographical meanings, but are merely used to enable a clear and consistent understanding of the application. Accordingly, it should be apparent to those skilled in the art that the following description of various embodiments of the present application is provided for illustration purpose only and not for the purpose of limiting the application as defined by the appended claims and their equivalents.

[0018] It is understood that the term "one" should be understood as "at least one" or "one or more" that is, the number of an element in one embodiment can be one, and the number of the element in another embodiment can be a plurality, and the term "one" cannot be understood as a limitation of the number.

[0019] Although ordinal numbers such as "first", "second", or the like will be used to describe various components, the components are not limited by the ordinal numbers. The ordinal numbers are used merely to distinguish one component from another. For example, a first component can be referred to as a second component, and likewise, a second component can also be referred to as a first component without departing from the teachings of the inventive concept. The term "and / or" used herein includes any and all combinations of one or more associated listed items.

[0020] The terms used herein are merely used to describe various embodiments and are not intended to limit the application. As used herein, the singular form is intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "has", when used in this specification, specify the presence of stated features, numbers, steps, operations, components, elements, or a combination thereof, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, components, elements, or groups thereof.

[0021] The schematic noise reduction structure of the vehicle window lifting motor, with reference to Figures 1 to 4 ​According to a preferred embodiment of the present invention, a noise reduction structure of a window lift motor includes a motor body 10, a transmission assembly 20 and a bearing assembly 30.

[0022] Specifically, if Figure 1 As shown, the motor body 10 includes a gear box 101, a motor housing 102 and a small housing 103, and the small housing 103 is located at the connection between the gear box 101 and the motor housing 102; in addition, the transmission assembly 20 includes a motor shaft 201, a worm wheel 202, a worm 203 and an output shaft 204, and the motor shaft 201 is provided with a worm 203, the worm 203 is engaged with the worm wheel 202, and the output shaft 204 is connected to the worm wheel 202; in addition, the bearing assembly 30 includes two self-aligning ball rolling bearings 301 and two oil-containing bearings 302, one of the self-aligning ball rolling shafts The bearing 301 is provided at one end of the gear box 101 away from the motor housing 102, the other self-aligning ball rolling bearing 301 is provided at the end of the motor housing 102 away from the gear box 101, one oil-containing bearing 302 is located at one end of the gear box 101 close to the motor housing 102, and the other oil-containing bearing 302 is provided on the small shell 103, the motor shaft 201 is penetrated by two oil-containing bearings 302, and the two ends of the motor shaft 201 respectively extend into the two self-aligning ball rolling bearings 301, and the two oil-containing bearings 302 are both located in the middle section of the motor shaft 201.

[0023] It should be noted that, compared with the prior art, the present application adds an oil-containing bearing 302 to the middle section of the motor shaft 201. By adding a support point to the middle section of the motor shaft 201, the shaking amplitude of the motor shaft 201 is effectively reduced. Compared with the prior art, the noise under no-load and load conditions is effectively reduced.

[0024] Please refer to Table 1 and Table 2 below for details:

[0025] Table 1 No-load noise data

[0026] Table 2 Load noise data Among them, CW refers to the forward rotation of the motor shaft 201, CCW refers to the reverse rotation of the motor shaft 201, and AVE refers to the average value after 5 tests. It is obvious that after adding the oil-containing bearing 302, the noise reduction structure of the window lift motor reduces the noise value by 1.5 dB under no-load and load conditions.

[0027] Further, if Figure 1 and Figure 2As shown, the noise reduction structure of the window lifting motor further comprises an elastic compensation ring 40 located between the motor shaft 201 and the worm 203, the side wall of the motor shaft 201 has a plurality of first protrusions 2011, the inner side wall of the worm wheel 202 has a plurality of second protrusions 2021, the outer side wall and the inner side wall of the elastic compensation ring 40 have a plurality of first grooves 401 and second grooves 402 arranged alternately respectively, the first protrusions 2011 are clamped into the second grooves 402, the second protrusions 2021 are clamped into the first grooves 401, and when the worm wheel 202 transmits force to the worm 203, the elastic compensation ring 40 deforms in the radial direction and provides a compensation space.

[0028] It should be noted that when the load of the external window is transmitted to the worm 203, the elastic compensation ring 40 is deformed in the radial direction under force and then transmits the load to the motor shaft 201 due to the provision of the elastic compensation ring 40 between the worm 203 and the motor shaft 201, thereby effectively reducing the deformation amount of the motor shaft 201 under load, i.e., the concave arc deformation of the motor shaft 201 provided with the elastic compensation ring 40 under load is smaller than the concave arc deformation of the motor shaft 201 without the elastic compensation ring 40, and since the deformation amount of the motor shaft 201 is small, the extrusion of the bearing combination 30 is also small, thereby further reducing the noise under load.

[0029] Further, as shown in Figure 1 and Figure 3 the noise reduction structure of the window lifting motor comprises an electromagnet 501, a distance sensor 502 and a magnetic ring 503, the magnetic ring 503 is sleeved on the motor shaft 201, the distance sensor 502 is located directly below the motor shaft 201 and is installed on the gear box 101, when the motor shaft 201 is pressed to be concave arc-shaped and makes the measured data of the distance sensor 502 less than a predetermined value, the electromagnet 501 generates a magnetic pole opposite to the magnetic ring 503 and provides a supporting force to the motor shaft 201.

[0030] It should be noted that when the motor shaft 201 is not under load, the distance between the side wall of the motor shaft 201 and the distance sensor 502 is within a predetermined range. When the motor shaft 201 is under load, the side of the motor shaft 201 close to the distance sensor 502 is deformed downward in a concave arc shape, and the distance between the side wall of the motor shaft 201 and the distance sensor 502 is shortened. If the shortened value is less than a preset value, the controller installed on the window lifting motor applies a distance to the electromagnet 501, and the magnetic pole of the electromagnet 501 at this moment is opposite to the magnetic pole of the magnetic ring 503 on the motor shaft 201 at this moment, which is directed to the electromagnet 501. At this time, the magnetic ring 503 is subjected to a magnetic repulsion, thereby providing support to the motor shaft 201 and reducing the deformation amount of the motor shaft 201 downward. In addition, preferably, the arrangement direction of the magnetic pole of the magnetic ring 503 is to magnetize the inside and outside, that is, the magnetic poles of the inside wall and the outside wall of the magnetic ring 503 are opposite, and the outside wall of the magnetic ring 503 is all N-pole or all S-pole.

[0031] Further, in order to transmit the load of the external window to the worm gear, as shown in the figure, the contact force between the first protrusion 2011 and the second groove 402 changes in steps from small to large, and the first protrusion 2011 and the bottom wall of the second groove 402 have a first accommodation space 4021, and the second protrusion 2021 and the bottom wall of the first groove 401 have a second accommodation space 4011. Figure 3

[0032] It should be noted that in the initial stress stage, due to the first accommodation space 4021 and the second accommodation space 4011, the first protrusion 2011 is not in contact with the second groove 402, and the second protrusion 2021 is not in contact with the first groove 401. After the elastic compensation ring 40 is further deformed under stress, the first protrusion 2011 is in contact with the second groove 402, and the second protrusion 2021 is in contact with the first groove 401.

[0033] Further, in order to provide more buffer space when the elastic compensation ring 40 deforms radially, as shown in the figure, the side wall of the elastic compensation ring 40 has a plurality of filling grooves 403. Figure 3

[0034] Further, in the embodiment of the present application, in order to provide support to the oil-containing bearing 302, as shown in the figure, the oil-containing bearing 302 is arranged in the first accommodation space 4021 of the first protrusion 2011 and the second groove 402. Figure 1 ​​As shown, the bearing assembly 30 further comprises a first bearing seat 303, the gear box 101 has an extension cylinder 1011 near one end of the small shell 103, the extension cylinder 1011 has a counterbore 1012, the first bearing seat 303 is arranged in the counterbore 1012, the first bearing seat 303 has a mounting groove away from one end of the small shell 103, an oil-impregnated bearing 302 is arranged in the mounting groove, and the motor shaft 201 passes through the first bearing seat 303.

[0035] It should be noted that the outside of the extension cylinder 1011 has a plurality of ribs 1013 to provide support for the extension cylinder 1011, the ribs 1013 are fixedly connected with the gear box 101, when the oil-impregnated bearing 302 is stressed, the load is transmitted to the first bearing seat 303, and is further supported by the extension cylinder 1011 and the ribs 1013.

[0036] Further, in the present application, the noise reduction structure of the window lifting motor further comprises a stator permanent magnet 601, a rotor skeleton 602 and a coil 603, the rotor skeleton 602 is fixedly connected with the motor shaft 201, the coil 603 is wound on the rotor skeleton 602, and the stator permanent magnet 601 is fixedly installed on the motor shell 102 and located outside the rotor skeleton 602. When the coil 603 is powered, the rotor skeleton 602 rotates and drives the motor shaft 201 to rotate circumferentially.

[0037] In summary, the noise reduction structure of the window lifting motor based on the embodiments of the present application is illustrated, which provides the noise reduction structure of the window lifting motor with the advantages of lower noise and the like.

[0038] Those skilled in the art should understand that the embodiments of the present application described above and shown in the drawings are only examples and do not limit the present application. The purpose of the present application has been fully and effectively achieved. The function and structural principle of the present application have been demonstrated and described in the embodiments, and the embodiments of the present application can be modified or changed in any way without departing from the principle.

Claims

1. A noise reduction structure of a window lifting motor, characterized by: The noise reduction structure of the vehicle window lifting motor comprises The motor body comprises a gear box, a motor shell and a small shell, the small shell being located at the joint of the gear box and the motor shell; The transmission assembly comprises a motor shaft, a worm gear, a worm and an output shaft, the worm being provided on the motor shaft, the worm being engaged with the worm gear, and the output shaft being connected with the worm gear; The bearing combination comprises two self-aligning ball bearings and two oil-containing bearings, one of the self-aligning ball bearings being provided at one end of the gear box away from the motor shell, the other self-aligning ball bearing being provided at one end of the motor shell away from the gear box, one of the oil-containing bearings being located at one end of the gear box close to the motor shell, the other oil-containing bearing being provided on the small shell, the motor shaft penetrating through the two oil-containing bearings, and the two ends of the motor shaft extending into the two self-aligning ball bearings respectively, and the two oil-containing bearings being located at the middle section of the motor shaft.

2. The noise reduction structure of a vehicle window lifting motor according to claim 1, characterized by: The noise reduction structure of the vehicle window lifting motor further comprises an elastic compensation ring, the elastic compensation ring being located between the motor shaft and the worm, the side wall of the motor shaft having a plurality of first protrusions, the inner side wall of the worm gear having a plurality of second protrusions, the outer side wall and the inner side wall of the elastic compensation ring respectively having a plurality of first grooves and second grooves arranged alternately, the first protrusions being clamped into the second grooves, and the second protrusions being clamped into the first grooves, when the worm gear transmits force to the worm, the elastic compensation ring deforms in the radial direction and provides a compensation space.

3. The noise reduction structure of a vehicle window lifting motor according to claim 2, characterized in that: The noise reduction structure of the vehicle window lifting motor comprises an electromagnet, a distance sensor and a magnetic ring, the magnetic ring being sleeved on the motor shaft, the distance sensor being located directly below the motor shaft and being installed on the gear box, when the motor shaft is pressed to be concave and makes the measured data of the distance sensor less than a predetermined value, the electromagnet generates a magnetic pole opposite to the magnetic ring and provides a supporting force for the motor shaft.

4. The noise reduction structure of a vehicle window lifting motor according to claim 2, characterized by: The first protrusions and the bottom wall of the second grooves have a first accommodation space, and the second protrusions and the bottom wall of the first grooves have a second accommodation space.

5. The noise reduction structure of a vehicle window lifting motor according to claim 4, characterized in that: The side wall of the elastic compensation ring has a plurality of filling grooves.

6. The noise reduction structure of a vehicle window lifting motor according to claim 1, characterized by: The bearing combination further comprises a first bearing seat, one end of the gear box close to the small shell has an extension cylinder, the extension cylinder has an expanded hole, the first bearing seat is placed in the expanded hole, one end of the first bearing seat away from the small shell has a mounting groove, one of the oil-containing bearings is provided in the mounting groove, and the motor shaft penetrates through the first bearing seat.

7. The noise reduction structure of a vehicle window lifting motor according to claim 3, characterized by: The noise reduction structure of the vehicle window lifting motor further comprises a stator permanent magnet, a rotor framework and a coil, the rotor framework is fixedly connected with the motor shaft, the coil is wound on the rotor framework, and the stator permanent magnet is fixedly installed on the motor shell and located outside the rotor framework.

8. The noise reduction structure of a vehicle window lifting motor according to claim 6, characterized by: The outer side of the extension cylinder has a plurality of ribs, and the ribs are fixedly connected with the gear box.

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