Speed reduction mechanism and electrical product

Abstract

The embodiment of the utility model provides a speed reducing mechanism and an electrical product, the speed reducing mechanism comprises a gear box assembly and a motor, the gear box assembly comprises a shell and a gear arranged on the shell, the motor is provided with an output shaft, the output shaft is meshed with the gear through a worm, the shell is provided with a first wall part, and the first wall part is provided with a second wall part; the first wall portion is located on a side opposite to a gear meshing side in a radial direction of the output shaft. According to the embodiment of the invention, the output shaft can be prevented from being bent due to overlarge load.

Description

Technical Field

[0001] This application relates to the field of electromechanical technologies, and particularly to a speed reduction mechanism and an electrical product. Background Art

[0002] In a speed reduction mechanism provided with a gearbox, the rotation of a worm on the output shaft side of a motor drives the gears in the gearbox to rotate. The speed reduction mechanism can be applied to devices such as electric sunroofs and electric skylights.

[0003] It should be noted that the above introduction of the technical background is only for the convenience of clearly and completely explaining the technical solution of this application and facilitating the understanding of those skilled in the art. It cannot be considered that the above technical solutions are well known to those skilled in the art just because these solutions are described in the background art part of this application. Summary of the Utility Model

[0004] The inventors found that in a speed reduction mechanism in which a worm drives the gears in a gearbox to rotate, the worm will be subjected to a large reverse force from the gears during startup. When the load on the worm is large due to the reverse force, it may cause the worm to bend, affecting the meshing efficiency, reducing the output performance, and increasing the noise at the same time.

[0005] In some existing structures, no support part is provided on the output shaft side, and the output shaft is easily bent due to the reverse force from the gears. In some other existing structures, for example, for motors with large torque and size, rolling bearings or sleeve bearings are provided at the output end to support the output shaft. Such support component structures are complex and costly.

[0006] In view of at least one of the above problems or other similar problems, an embodiment of this application provides a speed reduction mechanism, which includes:

[0007] A gearbox assembly, which includes a housing and gears provided in the housing; and

[0008] A motor, which has an output shaft, and the output shaft meshes with the gears through a worm,

[0009] Characterized in that the housing is provided with a first wall portion, and the first wall portion is located on the side opposite to the gear meshing side in the radial direction of the output shaft.

[0010] In at least one embodiment, the housing is further provided with a second wall portion, and the second wall portion is located on the side in the radial direction of the output shaft that is the same as the direction of gravity of the output shaft.

[0011] In at least one embodiment, the first wall portion and the second wall portion are adjacent and connected in the circumferential direction of the output shaft.

[0012] In at least one embodiment, the housing includes a bottom and a cover

[0013] The first wall portion and the second wall portion are disposed on the bottom

[0014] The cover is provided with a third wall portion and a fourth wall portion that are opposed to the first wall portion and the second wall portion

[0015] The output shaft is surrounded by the first wall portion, the second wall portion, the third wall portion, and the fourth wall portion

[0016] In at least one embodiment, the first wall portion and the second wall portion are integrally formed into a lower wall portion, and / or the third wall portion and the fourth wall portion are integrally formed into an upper wall portion

[0017] In at least one embodiment, there is a clearance fit between the output shaft and the first wall portion, the second wall portion, the third wall portion, and the fourth wall portion

[0018] In at least one embodiment, the lower wall portion is provided with a first cylinder extending toward the upper wall portion, and the upper wall portion is formed with a first groove for receiving the first cylinder, and / or

[0019] The upper wall portion is provided with a second cylinder extending toward the lower wall portion, and the lower wall portion is formed with a second groove for receiving the second cylinder

[0020] In at least one embodiment, compared with the worm, the first wall portion is axially located at a position farther from the motor than the output shaft

[0021] In at least one embodiment, the housing is further provided with a blocking portion located on the end side of the output shaft

[0022] An embodiment of the present application further provides an electrical product, and the electrical product includes the speed reduction mechanism as described above

[0023] One beneficial effect of the embodiment of the present application is that the housing of the gearbox assembly is provided with a first wall portion, and the first wall portion is located on the side opposite to the gear meshing side in the radial direction of the motor output shaft. Thus, the first wall portion can strengthen the support for the reaction force of the output shaft and prevent the output shaft from bending due to excessive load

[0024] Referring to the following description and drawings, specific embodiments of the present application are disclosed in detail, indicating the ways in which the principles of the present application can be adopted. It should be understood that the embodiments of the present application are not limited thereby in scope. Within the spirit and terms of the appended claims, the embodiments of the present application include many changes, modifications, and equivalents

[0025] Features described and / or illustrated with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in the other embodiments, or instead of features in the other embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Elements and features described in one drawing or one embodiment of the embodiments of the present application may be combined with elements and features shown in one or more other drawings or embodiments. In addition, in the drawings, like reference numerals denote corresponding components in several drawings and may be used to indicate corresponding components used in more than one embodiment.

[0027] The included drawings are used to provide a further understanding of the embodiments of the present application, which form a part of the specification, illustrate the embodiments of the present application, and together with the written description explain the principles of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. In the drawings:

[0028] Figure 1 is a schematic diagram of a speed reduction mechanism according to an embodiment of the present application;

[0029] Figure 2 is a schematic diagram of an output shaft of a motor according to an embodiment of the present application;

[0030] Figure 3 is a cross-sectional view of a speed reduction mechanism according to an embodiment of the present application;

[0031] Figure 4 is a schematic diagram of a cover part of a housing according to an embodiment of the present application;

[0032] Figure 5 is a schematic diagram of a speed reduction mechanism with the cover part removed according to an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] Referring to the drawings, the foregoing and other features of the embodiments of the present application will become apparent through the following description. In the following description and drawings, specific embodiments of the embodiments of the present application are specifically disclosed, which show some embodiments in which the principles of the embodiments of the present application can be adopted. It should be understood that the embodiments of the present application are not limited to the described embodiments. On the contrary, the embodiments of the present application include all modifications, variations, and equivalents falling within the scope of the appended claims.

[0034] In the embodiments of the present application, the term "and / or" includes any one and all combinations of one or more of the related listed terms. Terms such as "comprising", "including", "having", etc. mean the presence of the stated features, elements, components or assemblies, but do not exclude the presence or addition of one or more other features, elements, components or assemblies.

[0035] In the embodiments of the present application, the singular forms "a", "the", etc. may include the plural forms and should be broadly understood as "one kind" or "one type" rather than being limited to the meaning of "one"; in addition, the term "the" should be understood to include both the singular form and the plural form unless the context clearly indicates otherwise. In addition, the term "according to" should be understood as "at least partially according to...", and the term "based on" should be understood as "at least partially based on...", unless the context clearly indicates otherwise.

[0036] In the embodiments of the present application, for the convenience of description, the central axis OO' of the motor or the direction parallel thereto is referred to as the "axial direction", the radial direction centered on the axis is referred to as the "radial direction", and the direction around the axis is referred to as the "circumferential direction", but this is only for the convenience of description and does not limit the orientation of the motor during use and manufacturing.

[0037] The following describes various embodiments of the embodiments of the present application with reference to the accompanying drawings. These embodiments are merely exemplary and do not limit the embodiments of the present application.

[0038] The embodiments of the present application provide a speed reduction mechanism. Figure 1 It is a schematic diagram of the speed reduction mechanism of the embodiments of the present application.

[0039] As Figure 1 shown, the speed reduction mechanism 1 includes a gearbox assembly 10 and a motor 20. The gearbox assembly 10 includes a housing 11 and a gear 12 disposed in the housing 11. The motor 20 has an output shaft 21, and the output shaft 21 meshes with the gear 12 through a worm 22.

[0040] As Figure 1 shown, the housing 11 is provided with a first wall portion 111, and the first wall portion 111 is located on the side opposite to the meshing side of the gear 12 in the radial direction of the output shaft 21.

[0041] Figure 2 It is a schematic diagram of the output shaft of the motor in the embodiments of the present application, showing the situation of observing the output shaft along the axial direction.

[0042] As Figure 2 shown, the circumferential surface of the output shaft 21 includes a first portion S1 meshing with the gear 12 and a second portion S2 opposite to the first portion S1 in the radial direction. The first wall portion 111 of the housing 11 is located on the side of the second portion S2 of the output shaft 21.

[0043] Thus, the first wall portion 111 can strengthen the support for the reaction force of the output shaft 21, prevent the output shaft 21 from bending due to excessive load, avoid affecting the meshing efficiency and transmission performance, prevent the output performance from decreasing, and at the same time prevent the noise from increasing.

[0044] For example, when the reduction mechanism starts, the worm will be subjected to a large instantaneous reverse force from the gear, which may cause the worm and the output shaft to bend. In the embodiment of the present application, by providing the first wall portion in the housing, the support when the output shaft is subjected to the reaction force can be strengthened, the bending of the worm and the output shaft can be avoided, and the output performance can be ensured. During the normal operation of the reduction mechanism, the first wall portion will not contact the output shaft, so that the influence of the first wall portion on the output of the motor can be prevented.

[0045] It can be understood that the first wall portion 111 can be located at at least a part or all of the positions of the second part S2. The present application does not limit this, as long as the support for the reaction force of the gear received by the output shaft 21 can be realized through the first wall portion 111.

[0046] In the embodiment of the present application, the worm 22 can be sleeved on the output shaft 21, but the present application is not limited thereto. For example, the worm 22 can also be integrally formed on the output shaft 21, and the present application does not limit this.

[0047] As Figure 1 shown, in one or more embodiments, compared with the worm 22, the first wall portion 111 is axially located at a position farther from the motor 20 on the output shaft 21, that is, the first wall portion 111 is located at the end of the output shaft 21 away from the motor body.

[0048] Thus, supporting the output shaft at the outermost end of the output shaft can improve the supporting effect.

[0049] However, the present application is not limited thereto. For example, the first wall portion 111 can also be provided at other positions on the output shaft 21 in the circumferential direction. For example, compared with the worm 22, it is closer to the motor body, and the present application does not limit this.

[0050] As Figure 1 shown, in one or more embodiments, the housing 11 is further provided with a blocking portion 119, and the blocking portion 119 is located on the end side of the output shaft 21.

[0051] Thus, by providing the blocking portion on the end side of the output shaft, the excessive end play of the output shaft can be prevented from damaging the motor. In the embodiment of the present application, the specific shape of the blocking portion is not limited. For example, as Figure 1 shown, the blocking portion 119 can be in a "C" shape, which can prevent the output shaft from moving axially and also prevent the output shaft from moving radially. However, the present application is not limited thereto, and the blocking portion can also be in other shapes.

[0052] Figure 3 It is a cross-sectional view of the speed reduction mechanism according to an embodiment of the present application, showing the view observed from one end of the output shaft 21 far from the motor main body toward the motor main body.

[0053] As Figure 3 shown, in one or more embodiments, the housing 11 is further provided with a second wall portion 112, and the second wall portion 112 is located on the side in the radial direction of the output shaft 21 where the gravity direction of the output shaft 21 is the same. For example, in Figure 2 and Figure 3 when the direction G shown is the gravity direction of the output shaft 21, Figure 2 the third part S3 of the circumferential surface of the output shaft 21 shown is the side where the gravity direction is the same, and the second wall portion is located on the S3 side.

[0054] In this case, the output shaft 21 can be supported in the gravity direction by the second wall portion 112 to prevent the output shaft 21 from deforming downward.

[0055] As Figure 3 shown, in one or more embodiments, the first wall portion 111 and the second wall portion 112 are adjacent and connected in the circumferential direction of the output shaft. That is to say, there is no gap between the first wall portion 111 and the second wall portion 112. Thus, the overall strength of the first wall portion 111 and the second wall portion 112 can be improved, and the reliability of the support for the output shaft can be improved.

[0056] However, the present application is not limited thereto. For example, the first wall portion 111 and the second wall portion 112 may not be adjacent in the circumferential direction of the output shaft. For example, when the speed reduction mechanism is in a placement manner different from Figure 3 shown, the gravity direction of the output shaft 21 is different from Figure 3 the direction G shown. In this case, the second wall portion is different from Figure 2 and Figure 3 the third part S3 of the circumferential surface of the output shaft 21 shown. Thus, the first wall portion 111 and the second wall portion 112 may not be adjacent. In addition, even if the first wall portion 111 and the second wall portion 112 are adjacent in the circumferential direction of the output shaft, the two may not be connected, that is, a gap may be provided between the two. The present application does not limit this.

[0057] In one or more embodiments, as Figure 3 shown, the housing includes a bottom portion 113 and a cover portion 114. The first wall portion 111 and the second wall portion 112 are provided on the bottom portion 113, and the cover portion 114 is provided with a third wall portion 115 and a fourth wall portion 116 facing the first wall portion 111 and the second wall portion 112. As Figure 3As shown, the first wall portion 111 and the third wall portion 115 face each other, the second wall portion 112 and the fourth wall portion 116 face each other, and the output shaft 21 is surrounded by the first wall portion 111, the second wall portion 112, the third wall portion 115, and the fourth wall portion 116. Thus, by the first wall portion 111, the second wall portion 112, the third wall portion 115, and the fourth wall portion 116, it is possible to achieve the limit around the output shaft and enable the output shaft to rotate within a controllable space.

[0058] In one or more embodiments, as Figure 3 shown, the first wall portion 111 and the second wall portion 112 are integrally formed. The integrally formed first wall portion 111 and second wall portion 112 can be referred to as the lower wall portion 11A. Thus, the strength of the wall portion can be enhanced and the reliability can be improved. For example, the first wall portion 111 and the second wall portion 112 can be assembled to the housing after being integrally formed, but the present application is not limited thereto. For example, the first wall portion 111 and the second wall portion 112 can also be integrally formed with the bottom of the housing by injection molding or the like, which can further enhance the strength of the wall portion. In addition, the first wall portion 111 and the second wall portion 112 can also be separately formed and then respectively assembled to the housing 11.

[0059] In one or more embodiments, as Figure 3 shown, the third wall portion 115 and the fourth wall portion 116 are integrally formed. The integrally formed third wall portion 115 and fourth wall portion 116 can be referred to as the upper wall portion 11B. Thus, the strength of the wall portion can be enhanced and the reliability can be improved. For example, the third wall portion 115 and the fourth wall portion 116 can be assembled to the housing after being integrally formed, but the present application is not limited thereto. For example, the third wall portion 115 and the fourth wall portion 116 can also be integrally formed with the cover portion of the housing by injection molding or the like, which can further enhance the strength of the wall portion. In addition, the third wall portion 115 and the fourth wall portion 116 can also be separately formed and then respectively assembled to the housing 11.

[0060] In one or more embodiments, there is a clearance fit between the output shaft 21 and the first wall portion 111, the second wall portion 112, the third wall portion 115, and the fourth wall portion 116. Thus, when the first wall portion 111, the second wall portion 112, the third wall portion 115, and the fourth wall portion 116 surround the output shaft 21, space can also be provided for the rotation of the output shaft 21. That is to say, during the normal operation of the reduction mechanism, the output shaft 21 does not contact the first wall portion 111, the second wall portion 112, the third wall portion 115, and the fourth wall portion 116, so that it is possible to prevent the wall portion from affecting the output of the motor.

[0061] In the embodiments of the present application, the periphery of the output shaft 21 may include the first wall portion 111, the second wall portion 112, the third wall portion 115, and the fourth wall portion 116, but the present application is not limited thereto. For example, as Figure 3As shown, a fifth wall portion 120 may also be included around the output shaft 21. The fifth wall portion 120 may be provided on the bottom portion 113 and on the same side as the meshing side of the gear 12 in the radial direction of the output shaft 21, that is Figure 2 on the radially outer side of the second portion S2 of the output shaft 21 shown. The fifth wall portion 120 is adjacent to the second wall portion 112. Alternatively, the fifth wall portion 120 shown in Figure 3 may also be regarded as a part of the second wall portion 112. Thus, the support effect on the output shaft can be further improved. In addition, a sixth wall portion opposed to the fifth wall portion 120 may also be provided on the cover portion. The sixth wall portion may also be regarded as a part of the fourth wall portion 116. Thus, the output shaft 21 is surrounded by wall portions throughout its entire circumference, and the support effect on the output shaft can be further improved to prevent the output shaft from crosstalking. It should be noted, however, that the fifth wall portion 120 is not necessary, nor is the sixth wall portion

[0062] Figure 4 FIG. is a schematic diagram of the cover portion of the housing according to an embodiment of the present application Figure 5 FIG. is a schematic diagram of the speed reduction mechanism according to an embodiment of the present application with the cover portion removed

[0063] As shown in Figure 1 、 Figure 3 、 Figure 4 and Figure 5 shown, the first wall portion 111 and the second wall portion 112 are integrally formed into a lower wall portion 11A. In one or more embodiments, the lower wall portion 11A is provided with a first cylinder 117 extending toward the upper wall portion 11B, and the upper wall portion 11B is formed with a first groove 118 for receiving the first cylinder 117. Thus, through the mutual cooperation of the first cylinder 117 and the first groove 118, the positioning between the cover portion and the bottom portion is achieved, the positioning space of the wall portion of the output shaft is stabilized, and it is beneficial to the smooth output of the output shaft. Moreover, by forming the first cylinder 117 and the first groove 118 on the lower wall portion 11A and the upper wall portion 11B respectively, since the thickness of the wall portion is relatively thick, the reliability of the positioning can be improved

[0064] In the embodiment of the present application, there is no limitation on the specific setting position of the first cylinder 117. For example, the first cylinder 117 may be provided on the first wall portion 111, and the first cylinder 117 is provided at a portion of the first wall portion 111 that does not contact the output shaft 21. For example, the first cylinder 117 is provided on the end surface of the first wall portion 111 facing the cover portion 114. However, the present application is not limited thereto. For example, the first cylinder 117 may be provided on the second wall portion 112. For example, when the fifth wall portion 120 is regarded as a part of the second wall portion 112, the first cylinder 117 may be provided on the fifth wall portion 120. In addition, the first cylinder 117 may also be provided at a portion of the housing different from the first wall portion and the second wall portion

[0065] However, the present application is not limited thereto. For example, it may also be that the upper wall portion 11B is provided with a second cylinder extending towards the bottom, and the lower wall portion 11A is formed with a second groove for receiving the second cylinder. For example, the third wall portion is provided with a second cylinder extending towards the lower wall portion, and the first wall portion is formed with a second groove for receiving the second cylinder. However, the present application is not limited thereto. For example, it may also be that the fourth wall portion (the sixth wall portion) is provided with a second cylinder, and the second wall portion (the fifth wall portion) is formed with a second groove for receiving the second cylinder. Alternatively, while the first cylinder 117 and the first groove 118 cooperate with each other, the second cylinder and the second groove also cooperate with each other. Thus, the positioning accuracy can be improved.

[0066] The embodiment of the present application also provides an electrical product, and the electrical product includes a reduction mechanism 1. In the embodiment of the present application, the electrical product may include, but is not limited to, devices such as an electric awning and an electric sunroof.

[0067] It should be noted that the above Figures 1 to 5 only schematically describes the reduction mechanism of the embodiment of the present application, but the present application is not limited thereto. The specific content of each structure or component can also refer to the related art. In addition, structures or components not shown Figures 1 to 5 may be added, or Figures 1 to 5 one or more structures or components in Figures 1 to 5 may be reduced. For components or elements not specifically specified in

[0068] the related art can be referred to, and the present application does not limit this.

[0069] The preferred embodiments of the embodiment of the present application have been described above with reference to the accompanying drawings. Many features and advantages of these embodiments are clear from this detailed description. Therefore, the appended claims are intended to cover all these features and advantages that fall within the true spirit and scope of these embodiments. In addition, since many modifications and changes are easily conceivable by those skilled in the art, the embodiments of the present application are not limited to the exact structures and operations illustrated and described, but may cover all suitable modifications and equivalents that fall within its scope.

Claims

1. A speed reduction mechanism, comprising: a gearbox assembly including a housing and gears disposed in the housing; and a motor having an output shaft, the output shaft meshing with the gears through a worm, wherein the housing is provided with a first wall portion on a side opposite to the meshing side of the gears in the radial direction of the output shaft.

2. The speed reduction mechanism according to claim 1, wherein the housing is further provided with a second wall portion on a side in the radial direction of the output shaft and in the same direction as the gravity direction of the output shaft.

3. The speed reduction mechanism according to claim 2, wherein the first wall portion and the second wall portion are adjacent and connected in the circumferential direction of the output shaft.

4. The speed reduction mechanism according to claim 2, wherein the housing includes a bottom and a cover, the first wall portion and the second wall portion are provided on the bottom, the cover is provided with a third wall portion and a fourth wall portion opposite to the first wall portion and the second wall portion, and the output shaft is surrounded by the first wall portion, the second wall portion, the third wall portion, and the fourth wall portion.

5. The speed reduction mechanism according to claim 4, wherein the first wall portion and the second wall portion are integrally formed into a lower wall portion, and / or the third wall portion and the fourth wall portion are integrally formed into an upper wall portion.

6. The speed reduction mechanism according to claim 4, wherein a clearance fit is provided between the output shaft and the first wall portion, the second wall portion, the third wall portion, and the fourth wall portion.

7. The speed reduction mechanism according to claim 5, wherein the lower wall portion is provided with a first cylinder extending towards the upper wall portion, and the upper wall portion is formed with a first groove for receiving the first cylinder, and / or the upper wall portion is provided with a second cylinder extending towards the lower wall portion, and the lower wall portion is formed with a second groove for receiving the second cylinder.

8. The speed reduction mechanism according to any one of claims 1 to 7, wherein compared with the worm, the first wall portion is axially located at a position further away from the motor on the output shaft.

9. The speed reduction mechanism according to any one of claims 1 to 7, wherein the housing is further provided with a blocking portion located on the end side of the output shaft.

10. An electrical product, characterized in that, The electrical product includes the speed reduction mechanism according to any one of claims 1 to 9.

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