Gear ring mounting structure and gear box

Abstract

The utility model provides a gear ring mounting structure and a gear box, and the gear ring mounting structure comprises a gear ring mounting part which is provided with a spline groove and a clamping ring mounting groove; a protruding spline is arranged on the peripheral face of the gear ring, and the spline is embedded into the spline groove, so that the gear ring and the gear ring installation piece are installed in a circumferential anti-torque mode; the clamping ring is in an incomplete circular ring shape with a notch, two opposite fracture surfaces are formed in the notch, the clamping ring is installed in the clamping ring installation groove, the spline is provided with a plurality of protruding parts arranged in the circumferential direction of the gear ring, and each protruding part faces the two opposite side faces in the circumferential direction of the gear ring. A chamfer is arranged on the edge of at least one side, facing the clamping ring, of the gear ring in the axial direction, and / or a chamfer is arranged on one side, facing the gear ring, of the cross section of the clamping ring.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of gear transmission, and particularly relates to a gear ring mounting structure and a gear box. BACKGROUND

[0002] CN113799584A discloses an electric bridge driving system and a vehicle. The gear ring of the planetary gear mechanism is connected to the housing of the transmission through a spline. The axial movement of the gear ring can be limited by a clamping ring. The clamping ring is installed in the clamping groove of the housing.

[0003] CN105673815A discloses a clamping ring anti-falling device for a clutch oil cover. A fixed plate is installed at the opening of the clamping ring, and the fixed plate is a circular ring plate. The inner edges of the left and right ends of the fixed plate respectively extend outward to form left and right extensions, and the outer sides of the left and right extensions have a diameter smaller than the inner diameter of the clamping ring. The left and right extensions respectively extend below the left and right ends of the clamping ring. This structure can prevent the clamping ring from shrinking and falling out of the clamping ring mounting groove. However, this requires a separate fixed plate that matches the opening of the clamping ring, resulting in high cost, and precise control of the installation of the fixed plate and the opening of the clamping ring is required, resulting in difficult assembly. CONTENT OF THE UTILITY MODEL

[0004] The application aims to provide a gear ring mounting structure that can prevent the clamping ring from falling out of the clamping ring mounting groove on the gear ring mounting member. The application also provides a gear box.

[0005] The embodiments of the application provide a gear ring mounting structure, which comprises:

[0006] a gear ring mounting member provided with a spline groove and a clamping ring mounting groove;

[0007] a gear ring provided with a protruding spline on the outer circumferential surface, the spline being embedded in the spline groove to enable the gear ring and the gear ring mounting member to be mounted in a circumferential torsion-resistant manner; and

[0008] a clamping ring in the form of an incomplete circular ring having a gap, two opposite sections being formed at the gap, the clamping ring being mounted in the clamping ring mounting groove, and the spline having a plurality of protrusions arranged in the circumferential direction of the gear ring, wherein

[0009] the edges of each protrusion towards the opposite two sides in the circumferential direction of the gear ring are provided with chamfers in at least the side in the axial direction of the gear ring towards the clamping ring, and / or the side of the section of the clamping ring towards the gear ring is provided with a chamfer.

[0010] In at least one possible embodiment, the chamfer is provided in at least one of the clamping ring and the protrusion, which has a higher material hardness.

[0011] In at least one possible implementation, at the gap of the snap ring, a cross section of the gap is provided with a snap ring chamfer on both sides in the axial direction of the snap ring.

[0012] In at least one possible implementation, the hardness of the snap ring is lower than the hardness of the ring gear,

[0013] The edge of each protrusion towards at least one side of the ring gear in the axial direction of the ring gear towards the opposite two sides in the circumferential direction of the ring gear is provided with a spline chamfer.

[0014] In at least one possible implementation, the outer circumferential surface of the ring gear between two adjacent protrusions is provided with a ring gear circumferential chamfer, and the ring gear circumferential chamfer and the spline chamfer are smoothly connected.

[0015] In at least one possible implementation, the snap ring can be fitted into the snap ring mounting groove when elastically deformed, and retained in the snap ring mounting groove after at least partial recovery of the elastic deformation.

[0016] In at least one possible implementation, the snap ring mounting groove side wall on the side away from the spline groove of the snap ring mounting groove is provided with a plurality of recesses, and the plurality of recesses and the recessed part of the spline groove are located at the same position in the circumferential direction of the snap ring mounting groove.

[0017] In at least one possible implementation, the snap ring mounting groove is provided on one side in the axial direction of the spline groove, and the ring gear mounting member is provided with an inner flange on the other side in the axial direction of the spline groove, and the snap ring and the inner flange limit the position of the ring gear relative to the ring gear mounting member on both sides in the axial direction.

[0018] In at least one possible implementation, the ring gear mounting member is a housing of a gear box.

[0019] The embodiments of the present application also propose a gear box, which comprises a housing and a planetary gear assembly received in the housing, the planetary gear assembly comprising a ring gear, and the ring gear is mounted on the housing as the ring gear mounting member through the ring gear mounting structure according to any one of the above technical solutions.

[0020] By adopting the above technical solutions, the chamfer is provided on the protrusion of the spline and / or the snap ring, which avoids the protrusion of the spline blocking the movement of the snap ring and causing the snap ring to shrink, and thus the snap ring can be prevented from being separated from the snap ring mounting groove through a simple mounting structure. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 A schematic view of a ring gear mounting structure according to an embodiment of the present application is shown.

[0022] Figure 2 a partial enlarged view of Figure 1 a partial enlarged view of

[0023] Figure 3 a partial enlarged view of a tooth ring mounting structure according to an embodiment of the present application is shown.

[0024] Figure 4 a partial enlarged view of a tooth ring mounting structure according to an embodiment of the present application is shown.

[0025] Figure 5 a partial enlarged view of a tooth ring mounting structure according to an embodiment of the present application is shown.

[0026] Figure 6 a partial enlarged view of Figure 5 a partial enlarged view of

[0027] Figure 7 a partial enlarged view of a tooth ring mounting structure according to an embodiment of the present application is shown.

[0028] Figure 8 a partial enlarged view of a tooth ring mounting structure according to an embodiment of the present application is shown.

[0029] BRIEF DESCRIPTION OF DRAWINGS

[0030] 1 tooth ring mounting member 11 spline groove 12 snap ring mounting groove 13 snap ring mounting groove side wall 14 recess

[0031] 2 tooth ring 21 spline 211 protrusion 22 spline chamfer 23 tooth ring peripheral surface chamfer

[0032] 3 snap ring 31 notch 32 cross section 33 snap ring chamfer

[0033] A axial C circumferential. DETAILED DESCRIPTION

[0034] In order to more clearly illustrate the above-mentioned purposes, features and advantages of the present application, the specific embodiments of the present application are described in detail in this section in conjunction with the drawings. In addition to the various embodiments described in this section, the present application can be implemented in other different ways, and those skilled in the art can make corresponding improvements, modifications and substitutions without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed in this section. The scope of protection of the present application should be subject to the claims.

[0035] As Figures 1 to 8As shown, the embodiment of the present application proposes a gear box, which comprises a housing (ring gear mount 1) and a planetary gear assembly, the planetary gear assembly comprising a ring gear 2, a plurality of planet gears, a planet carrier and a sun gear. The ring gear 2 is annular, and the inner periphery of the ring gear 2 is provided with teeth for engaging with gears (planet gears), the ring gear 2 is fixedly connected to the housing (ring gear mount 1), the plurality of planet gears are rotatably connected to the planet carrier relative to the planet carrier, and the sun gear is arranged at the center position of the ring gear 2, the plurality of planet gears both engage with the ring gear 2 and engage with the sun gear.

[0036] As shown in Figure 7 and Figure 8 , the housing (ring gear mount 1) can be provided with a spline groove 11 and a snap ring mounting groove 12, the outer periphery of the ring gear 2 is provided with a spline 21 (see, for example Figure 3 , the ring gear 2 and the housing can be mounted in a circumferential torsion-resistant manner by embedding the spline 21 into the spline groove 11, and the ring gear 2 cannot rotate relative to the housing (ring gear mount 1). The snap ring mounting groove 12 can be arranged on the axial side of the spline groove 11, and the snap ring mounting groove 12 is closer to the opening of the housing than the spline groove 11.

[0037] As shown in Figures 1 to 3 , Figure 5 and Figure 6 , the snap ring 3 is an incomplete circular ring with a notch 31, and two opposite sections 32 are formed at the notch 31. The snap ring 3 can be elastically deformed by being squeezed, and the snap ring 3 can be mounted into the snap ring mounting groove 12 by elastically deforming the snap ring 3 by applying an external force to the snap ring 3, and the snap ring 3 remains in the snap ring mounting groove 12 after at least partial recovery of the elastic deformation. The inner diameter of the snap ring 3 can be smaller than the outer diameter of the ring gear 2, and the snap ring 3 is at least partially located on the axial side of the spline 21, and the snap ring 3 located on the axial side of the ring gear 2 can prevent the ring gear 2 from being separated from the spline groove 11 in the axial direction A. The ring gear mount 1 is provided with an inner flange on the other axial side of the spline groove 11, and the snap ring 3 and the inner flange limit the position of the ring gear 2 relative to the ring gear mount 1 on both axial sides.

[0038] As shown in Figure 6 , Figure 7 and Figure 8 , the snap ring mounting groove side wall 13 on the side of the snap ring mounting groove 12 away from the spline groove 11 can be provided with a plurality of recesses 14. On the circumferential direction C of the snap ring mounting groove 12, the recesses 14 are located at the same position as the recessed portions of the spline groove 11 (or the protrusions 211 of the spline 21), so that when the ring gear 2 is mounted, the spline 21 can be embedded into the spline groove 11 through the recesses 14. The snap ring mounting groove side wall 13 can block the snap ring 3 from being separated from the snap ring mounting groove 12 in the axial direction A.

[0039] As shown in Figure 4 and Figure 6As shown, the spline 21 comprises a plurality of protrusions 211 arranged along the circumference C of the ring gear 2.

[0040] Under the driving of the gear meshing, the snap ring 3 installed in the snap ring installation groove 12 can rotate relative to the ring gear mount 1 along the circumference C. The snap ring 3 can be deformed by the extrusion of the ring gear 2 and the snap ring installation groove side wall 13, especially at the position of the notch 31. This can cause the cross section of the snap ring 3 to contact the protrusion 211, which can cause the snap ring 3 to shrink and disengage from the snap ring installation groove 12.

[0041] The edges of each protrusion 211 on the opposite two sides in the circumference C of the ring gear 2, at least on the side in the axial direction A of the ring gear 2 towards the snap ring 3 and / or on the side of the cross section 32 of the snap ring 3 towards the ring gear 2 can be provided with a chamfer (including a rounded chamfer). In this way, when the snap ring 3 rotates relative to the ring gear mount 1 along the circumference C, the snap ring 3 can slide along the inclined surface of the chamfer, so that the protrusion 211 does not block the snap ring 3, and the snap ring does not deform and shrink, and can remain in the snap ring installation groove 12 and does not disengage.

[0042] It can be understood that in the case where only one of the snap ring 3 and the protrusion 211 of the ring gear 2 is provided with a chamfer, the chamfer can be provided on the one with higher material hardness, so that the sharp edge of the one with higher hardness and without chamfer can be prevented from being stuck into the inclined surface of the one with lower hardness and with chamfer. If the edge is stuck into the inclined surface, it can also cause the snap ring 3 to disengage from the snap ring installation groove 12.

[0043] Further, the edges of each protrusion 211 on the opposite two sides in the circumference C of the ring gear 2, at least on the side in the axial direction A of the ring gear 2 towards the snap ring 3 and / or on the side of the cross section 32 of the snap ring 3 towards the ring gear 2 are provided with a spline chamfer 22. The spline chamfer 22 can prevent the cross section 32 of the snap ring 3 from being stuck to the ring gear 2, and when the snap ring 3 rotates along the circumference C, the cross section 32 can contact the spline chamfer 22, so that the protrusion 211 does not block the snap ring 3, and the cross section 32 can slide over the spline chamfer 22, thereby preventing the snap ring 3 from disengaging from the snap ring installation groove 12 and causing damage to the gearbox.

[0044] Further, as shown, Figure 6 At the position of the notch 31 of the snap ring 3, the cross section 32 of the notch 31 is provided with a snap ring chamfer 33 on at least the side in the axial direction A of the snap ring 3 towards the ring gear 2.

[0045] Further, at the position of the notch 31 of the snap ring 3, the cross section 32 is provided with a snap ring chamfer 33 on both sides in the axial direction A of the snap ring 3, so that when assembling, the installation direction of the snap ring 3 does not need to be confirmed, and the snap ring 3 cannot be installed in reverse, and the snap ring chamfer 33 cannot function.

[0046] As shown, Figure 4As shown, the outer circumferential surface of the ring gear 2 between two adjacent convex portions 211 is provided with a ring gear circumferential surface chamfer 23, which is smoothly connected with the spline chamfer 22.

[0047] In a possible implementation, the convex portions 211 of the spline of the ring gear 2 are provided with bevels, and the snap ring 3 is not provided with bevels. The hardness of the snap ring 3 can be lower than the hardness of the ring gear 2. For example, the hardness of the snap ring 3 can be 400 HV (Vickers hardness), and the hardness of the ring gear 2 can be 800 HV (Vickers hardness). In this way, the sharp edges of the broken surface 32 can be prevented from penetrating into the bevels of the spline chamfer 22 when the snap ring 3 rotates, thereby hindering the rotation of the snap ring 3 along the circumferential direction C and causing the deformation of the snap ring 3.

[0048] The ring gear mounting structure of the present application can fix the ring gear 2 in the axial direction A through the snap ring 3, and can avoid the falling off of the snap ring 3 without other components, so that the mounting structure is simple, the cost is low, and the mounting and dismounting operations of the ring gear 2 are convenient, which is conducive to improving the assembly efficiency.

[0049] It should be understood that at least some aspects or features of the above-mentioned implementations, embodiments or examples can be appropriately combined.

[0050] It can be understood that, in the present application, the number of components or members is not particularly limited, and the number can be one or more, and the plurality herein refers to two or more. For the specific number of components or members, such as two, three, four, etc. shown in the drawings and / or described in the description, the specific number is generally exemplary rather than limiting, and it can be understood as a plurality, i.e. two or more, but this does not mean that the present application excludes the case of one.

[0051] In the present application, unless otherwise explicitly stated or limited, the terms "mounting", "assembly", "assembling", "connecting", "connecting", "coupling", "connecting", "abutting", "communicating", "communicating", "conducting", "fixing", "fastening" and the like should be understood in a broad sense, for example, it can be direct or indirect. For example, in terms of connection, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication or interaction relationship between two elements, unless otherwise explicitly stated or limited. For example, in terms of communication / conduction, it can be direct communication / conduction, or indirect communication / conduction via an intermediate medium. For those skilled in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

[0052] In the present application, unless specifically stated or limited otherwise, a component is disposed in / installed in / located in / contained in / placed in another component, etc. can be either of the following two cases: a part or most of the component is located in the other component; and the component is completely contained in the other component.

[0053] Although the present application has been described in detail above with reference to the embodiments, it is apparent to those skilled in the art that the present application is not limited to the embodiments described in the present specification. The present application can be modified in various ways without departing from the spirit and scope of the present application as defined by the claims, and can be implemented as modified embodiments. Therefore, the description in the present specification is intended for the purpose of illustration only, and does not have any restrictive meaning on the present application.

Claims

1. A gear ring mounting structure characterized by comprising: include: A gear ring mounting component, wherein the gear ring mounting component is provided with a spline groove and a retaining ring mounting groove; A gear ring, wherein the outer circumferential surface of the gear ring is provided with a raised spline, the spline being embedded in the spline groove, so that the gear ring and the gear ring mounting member are circumferentially anti-torsionally mounted; and A retaining ring, wherein the retaining ring is an incomplete circular ring with a notch, and two opposing cross-sections are formed at the notch; the retaining ring is installed in a retaining ring mounting groove; the spline has a plurality of protrusions arranged circumferentially along the gear ring, wherein... Each of the protrusions has a chamfer on at least one side of the toothed ring facing opposite sides in the circumferential direction, and / or a chamfer on the side of the cross-section of the retaining ring facing the toothed ring.

2. The gear ring mounting structure according to claim 1, characterized by Of the retaining ring and the protrusion, at least the one with higher material hardness is provided with the chamfer.

3. The gear ring mounting structure according to claim 1, characterized by At the notch of the retaining ring, the cross-section of the notch is provided with retaining ring chamfers on both sides of the retaining ring in the axial direction.

4. The gear ring mounting structure according to claim 1, characterized by The hardness of the retaining ring is lower than that of the gear ring. Each of the protrusions faces two opposite sides in the circumferential direction of the gear ring, and at least one edge of the gear ring facing the retaining ring in the axial direction is provided with a spline chamfer.

5. The gear ring mounting structure according to claim 4, characterized by A toothed ring circumferential chamfer is provided on the outer circumferential surface of the toothed ring between two adjacent protrusions, and the toothed ring circumferential chamfer and the spline chamfer are smoothly connected.

6. The gear ring mounting structure according to claim 1, characterized by The retaining ring is capable of being inserted into the retaining ring mounting groove when it undergoes elastic deformation, and remains within the retaining ring mounting groove after at least partially recovering its elastic deformation.

7. The gear ring mounting structure according to claim 1, characterized by The retaining ring mounting groove has multiple recesses on the side wall away from the spline groove. In the circumferential direction of the retaining ring mounting groove, the multiple recesses are located at the same position as the recessed portion of the spline groove.

8. The gear ring mounting structure according to claim 1, characterized by The retaining ring mounting groove is located on one axial side of the spline groove, and the gear ring mounting member has an inner flange on the other axial side of the spline groove. The retaining ring and the inner flange restrict the position of the gear ring relative to the gear ring mounting member on both axial sides.

9. The gear ring mounting structure according to claim 1, characterized by The gear ring mounting component is the housing of the gearbox.

10. A gear box characterized in that, The gearbox includes a housing and a planetary gear assembly housed within the housing. The planetary gear assembly includes a ring gear, which is mounted to the housing as a ring gear mount via a ring gear mounting structure as described in any one of claims 1 to 9.

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