Gear ring mounting structure, gear box and bridge driving system for vehicle

Abstract

The invention provides a gear ring mounting structure, a gear box and an electric bridge driving system for a vehicle. The ring gear mounting structure may comprise: a housing (4); the gear ring (1) is arranged on the shell (4) through a spline; the clamping ring (2) is installed on the inner periphery of the shell (4), the clamping ring (2) is arranged on the radial outer side of the gear ring (1), and the clamping ring (2) and the gear ring (1) are at least partially overlapped in the radial direction of the gear ring (1), so that the gear ring (1) is limited to move in the axial direction (A) of the shell (4); the clamping ring (2) is installed on the outer periphery of the gear ring (1), the clamping ring anti-disengagement ring (3) is installed on the inner side of the clamping ring (2) in the radial direction, the clamping ring (2) and the clamping ring anti-disengagement ring (3) are partially or completely overlapped in the axial direction of the gear ring (1), the clamping ring anti-disengagement ring (3) can limit the clamping ring (2) from shrinking and deforming towards the inner side in the radial direction of the clamping ring (2), and therefore the clamping ring (2) is prevented from disengagement from the shell (4).

Description

Technical Field

[0001] The present application relates to a ring gear mounting structure, a gear box and an electric axle drive system for a vehicle. Background Art

[0002] In a planetary gearbox, the ring gear is connected to the housing of the gearbox via splines, and a limiting component such as a snap ring is used to limit the axial movement of the ring gear.

[0003] Patent CN113799584A discloses an electric bridge drive system and a vehicle, which uses a snap ring to axially limit the ring gear, and the snap ring is installed in a snap ring groove on the inner circumference of the housing. However, the snap ring has an opening, and when the gearbox is working, the snap ring may be impacted by the ring gear and shrink, and fall off from the snap ring groove, which may cause the gearbox to malfunction.

[0004] Patent CN105673815A discloses a clutch oil retaining cover snap ring anti-drop device, which uses a fixed plate installed at the opening of the snap ring. The fixed plate is a section of a circular ring plate. The inner edges of the left and right ends of the fixed plate extend outward to form a left extension and a right extension. The diameter of the outer side of the left extension and the right extension is smaller than the inner diameter of the snap ring. This structure can prevent the snap ring from shrinking and falling off from the snap ring groove. However, the use of a special shape of the fixed plate to match the opening of the snap ring may lead to higher costs, and the openings of the fixed plate and the snap ring need to match accurately, which will cause assembly difficulties. Summary of the invention

[0005] The present application aims to provide a ring gear mounting structure to provide reliable axial limiting for the ring gear. The present application also provides a gearbox including the ring gear mounting structure and a vehicle electric axle drive system including the gearbox.

[0006] The embodiment of the present application provides a gear ring mounting structure, comprising:

[0007] case;

[0008] A gear ring, the gear ring being mounted on the housing through a spline;

[0009] a snap ring, the snap ring being mounted on the inner circumference of the housing, the snap ring being disposed radially outward of the gear ring, the snap ring and the gear ring at least partially overlapping in the radial direction of the gear ring, thereby limiting the axial movement of the gear ring along the housing; and

[0010] A snap ring anti-slip ring, which is installed on the outer periphery of the gear ring, and is arranged radially inner than the snap ring, and the snap ring and the snap ring anti-slip ring are partially or completely overlapped in the axial direction of the gear ring, and the snap ring anti-slip ring can limit the shrinkage and deformation of the snap ring radially inward, thereby preventing the snap ring from falling off from the housing.

[0011] In at least one possible implementation, a snap ring groove is provided on the inner circumference of the housing, the snap ring is embedded in the snap ring groove, and the snap ring groove axially fixes the snap ring.

[0012] The outer periphery of the gear ring is provided with an anti-slip groove, the snap ring anti-slip ring is embedded in the anti-slip groove, and the anti-slip groove axially fixes the snap ring anti-slip ring.

[0013] In at least one possible implementation, the snap ring anti-slip ring and the snap ring are spaced apart in the radial direction of the snap ring, and a radial gap between the snap ring anti-slip ring and the snap ring is less than or equal to a depth of the snap ring embedded in the snap ring groove.

[0014] In at least one possible implementation, the snap ring anti-slip ring does not contact the housing.

[0015] In at least one possible embodiment, an outer peripheral portion of the gear ring is provided with an external spline, and the external spline is located at a middle position of the gear ring in the axial direction.

[0016] The anti-drop ring groove is arranged on one axial side of the external spline.

[0017] The housing is provided with a shoulder for axially limiting the gear ring, and the shoulder is arranged on the other axial side of the gear ring.

[0018] In at least one possible implementation, when viewed along the axial direction of the gear ring, the retaining ring blocks a portion of the external spline, thereby limiting the movement of the gear ring along the axial direction.

[0019] In at least one possible embodiment, the snap ring is elastic, and in a natural state, the outer diameter of the snap ring is larger than the inner diameter of the side wall portion on one axial side of the snap ring groove, so that the snap ring is elastically deformed and inserted into the snap ring groove.

[0020] The snap ring anti-slip ring is elastic. In a natural state, the inner diameter of the snap ring anti-slip ring is smaller than the outer diameter of the side wall portion on one axial side of the anti-slip ring groove, so that the snap ring anti-slip ring is elastically deformed and inserted into the anti-slip ring groove.

[0021] In at least one possible implementation, the snap ring is a C-shaped ring having a snap ring opening, and the snap ring anti-slip ring is a C-shaped ring having an anti-slip ring opening.

[0022] An embodiment of the present application further provides a gearbox, which includes a ring gear mounting structure according to any one of the above technical solutions, and the ring gear is a ring gear of a planetary gear set.

[0023] The embodiment of the present application further proposes a vehicle electric bridge drive system, comprising:

[0024] Motors; and

[0025] The gearbox described in the above technical solution.

[0026] By adopting the above technical solution, the ring gear mounting structure, the gear box and the vehicle electric axle drive system can provide reliable axial limitation for the ring gear, limit the shrinkage deformation of the retaining ring, and prevent the retaining ring from falling off and causing damage to the gear box. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic structural diagram of a gearbox according to an embodiment of the present application is shown.

[0028] Figure 2 A partial cross-sectional view of a gearbox according to an embodiment of the present application is shown.

[0029] Figure 3 Shows Figure 1 A partial enlarged view of .

[0030] Figure 4 A schematic structural diagram of a gear ring of a gear box according to an embodiment of the present application is shown.

[0031] Figure 5 A schematic structural diagram of a retaining ring of a gear box according to an embodiment of the present application is shown.

[0032] Figure 6 A schematic structural diagram of a snap ring anti-slip ring of a gear box according to an embodiment of the present application is shown.

[0033] Description of Reference Numerals

[0034] 1 gear ring 11 tooth part 12 external spline 13 anti-slip ring groove

[0035] 2 snap ring 21 snap ring opening

[0036] 3 snap ring anti-slip ring 31 anti-slip ring opening

[0037] 4 housing 41 snap ring groove 42 shoulder

[0038] A-axis DETAILED DESCRIPTION

[0039] In order to more clearly explain the above-mentioned purposes, features and advantages of the present application, the specific implementation methods of the present application are described in detail in this section in conjunction with the accompanying drawings. In addition to the various implementation methods described in this section, the present application can also be implemented in other different ways. Without violating the spirit of the present application, those skilled in the art can make corresponding improvements, deformations and substitutions, so the present application is not limited by the specific embodiments disclosed in this section. The scope of protection of the present application shall be subject to the claims.

[0040] like Figures 1 to 6 As shown, the embodiment of the present application proposes a gear ring mounting structure and a gearbox. The gearbox involved in the present application has a planetary gear set, and the gearbox can be a coaxial gearbox, that is, the input shaft and the output shaft are coaxial, and the gearbox can be used in the electric bridge drive system of the vehicle.

[0041] In this application, if Figure 1 As shown, the axial directions of the gear ring 1, the snap ring 2, the snap ring anti-drop ring 3 and the gear box are consistent. In the following description, the axial direction refers to the axial direction of the gear box.

[0042] The gear box comprises a gear ring 1 , a snap ring 2 , a snap ring anti-slip ring 3 and a housing 4 .

[0043] like Figures 1 to 4 As shown, the gear ring 1 can be installed on the housing 4 through a spline. The gear ring 1 is annular, and the inner circumference of the gear ring 1 can be provided with a tooth portion 11, which can mesh with the gear on the radial inner side of the gear ring 1. The tooth portion 11 can be a helical tooth, a straight tooth, a herringbone tooth, etc. The outer circumference of the gear ring 1 can be provided with an external spline 12, and the inner circumference of the housing 4 can be provided with an internal spline. The internal spline and the external spline 12 cooperate to install the gear ring 1 on the housing 4. The external spline 12 can be located in the middle position of the gear ring 1 in the axial direction.

[0044] An anti-slip ring groove 13 is provided on the outer periphery of the gear ring 1 . The anti-slip ring groove 13 may be located on one axial side of the external spline 12 . The anti-slip ring groove 13 is used for positioning and installing the snap ring anti-slip ring 3 .

[0045] like Figures 1 to 3 and Figure 5 As shown, the inner circumference of the housing 4 may be provided with a snap ring groove 41, the snap ring 2 is embedded in the snap ring groove 41, the snap ring groove 41 limits the snap ring 2 in the axial direction A, and the snap ring 2 may be located on one axial side of the external spline 12, thereby limiting the axial movement of the gear ring 1. The housing 4 is provided with a shoulder 42, and the shoulder 42 is located on the other axial side of the gear ring 1. One end of the gear ring 1 can be axially limited by the snap ring 2, and the other end of the gear ring 1 can be axially limited by the shoulder 42 of the housing 4.

[0046] The snap ring 2 is a C-shaped ring with a snap ring opening 21. The snap ring 2 is elastic. The snap ring opening 21 allows the snap ring 2 to shrink in the radial direction when an external force is applied to it. The snap ring 2 shrinks in the radial direction, so that the snap ring 2 can be installed in the snap ring groove 41. The snap ring groove 41 fixes the snap ring 2 in the axial direction A.

[0047] In the natural state, the outer diameter of the snap ring 2 is larger than the side wall of the snap ring groove 41 ( Figure 2The inner diameter of the left side wall of the retaining ring 41 is 0.1mm, and the retaining ring 2 can be installed into the retaining ring groove 41 along the axial direction A after elastic deformation and at least partially restore its original shape. The retaining ring 2 in the retaining ring groove 41 can be in a natural state or squeezed by the bottom wall of the retaining ring groove 41. The size requirements for the retaining ring groove 41 and the retaining ring 2 are relatively low, the manufacturing cost is low, and the disassembly and assembly are convenient.

[0048] like Figure 3 As shown, the snap ring 2 and the ring gear 1 at least partially overlap in the radial direction of the gearbox. When viewed along the axial direction A, the snap ring 2 can cover a portion of the ring gear 1 (such as the external spline 12 ), thereby limiting the movement of the ring gear 1 along the axial direction A through the snap ring 2 .

[0049] like Figures 1 to 3 and Figure 6 As shown, the snap ring anti-slip ring 3 is a C-shaped ring with an anti-slip ring opening 31. The snap ring anti-slip ring 3 is elastic. The anti-slip ring opening 31 allows the snap ring anti-slip ring 3 to expand in the radial direction when an external force is applied to stretch it. By expanding the snap ring anti-slip ring 3 in the radial direction, the snap ring anti-slip ring 3 can be installed in the anti-slip ring groove 13, and the anti-slip ring groove 13 axially fixes the snap ring anti-slip ring 3.

[0050] In the natural state, the inner diameter of the snap ring anti-slip ring 3 is smaller than the side wall portion of the anti-slip ring groove 13 ( Figure 2 The outer diameter of the snap ring anti-slip ring 3 is the left side wall in the middle of the ring, and the snap ring anti-slip ring 3 can be installed into the anti-slip ring groove 13 along the axial direction A after elastic deformation, and at least partially restore the original state. The snap ring anti-slip ring 3 in the anti-slip ring groove 13 can be in a natural state or can be squeezed by the bottom wall of the anti-slip ring groove 13. The size requirements for the anti-slip ring groove 13 and the snap ring anti-slip ring 3 are relatively low, the manufacturing cost is low, and the disassembly and assembly are convenient.

[0051] On the axial direction A of the gear box, the snap ring anti-slip ring 3 and the snap ring 2 can be in the same area, the snap ring anti-slip ring 3 is located radially inside the snap ring 2, the snap ring anti-slip ring 3 can be radially spaced apart from the snap ring 2, the snap ring 2 and the snap ring anti-slip ring 3 partially or completely overlap in the axial direction of the ring gear 1, and the snap ring anti-slip ring 3 can limit the snap ring 2 from shrinking and deforming radially inside.

[0052] Furthermore, the radial clearance between the snap ring anti-slip ring 3 and the snap ring 2 can be less than or equal to the depth of the snap ring 2 embedded in the snap ring groove 41. In this way, even if the snap ring 2 shrinks and deforms, when the inner circumference of the snap ring 2 contacts the outer circumference of the snap ring anti-slip ring 3, the snap ring 2 is still in the snap ring groove 41, and the snap ring 2 is restricted in axial movement by the snap ring groove 41 and cannot fall out of the snap ring groove 41.

[0053] When the gearbox is repaired or disassembled, the snap ring anti-slip ring 3 can be removed from the anti-slip ring groove 13 first, and then the snap ring 2 can be removed from the snap ring groove 41, and finally the gear ring 1 can be removed. Figure 2One axial end surface of the snap ring anti-slip ring 3 can be exposed from the gear ring 1 or from the anti-slip ring groove 13, so that it is convenient to remove the snap ring anti-slip ring 3 from the anti-slip ring groove 13.

[0054] It can be understood that various means in the prior art can be used to install and remove the snap ring 2 and the snap ring anti-slip ring 3. The snap ring 2 and the snap ring anti-slip ring 3 can also have such structures or features, which will not be described in detail here.

[0055] The snap ring anti-slip ring 3 may not contact the housing 4. When the gearbox is working normally, the housing 4 or the gear ring 1 does not apply force to the snap ring anti-slip ring 3, so the snap ring anti-slip ring 3 will not slip out of the anti-slip ring groove 13. Only when the snap ring 2 accidentally shrinks and deforms radially inwardly can it contact the snap ring anti-slip ring 3, and this force will not cause the snap ring anti-slip ring 3 to slip out of the anti-slip ring groove 13.

[0056] The gear ring mounting structure and the gear box of the present application can provide reliable axial positioning for the gear ring, limit the shrinkage and deformation of the snap ring, prevent the snap ring 2 from shrinking and deforming under the action of force and then falling out of the snap ring groove 41, and avoid the snap ring falling off and causing damage to the gear box. In addition, the gear ring mounting structure and the gear box have simple structures, reliable connections, and are easy to disassemble and assemble.

[0057] It should be understood that at least some aspects or features of the above-mentioned implementation modes, embodiments or examples may be appropriately combined.

[0058] It is understood that in the present application, when the number of parts or components is not particularly limited, the number may be one or more, and the multiple here means two or more. For the case where the number of parts or components shown in the drawings and / or described in the specification is a specific number such as two, three, four, etc., the specific number is usually exemplary and not restrictive, and it can be understood as multiple, that is, two or more, but this does not mean that the present application excludes the case of one.

[0059] In the present application, unless otherwise clearly stated or limited, the terms such as "install", "assemble", "assemble", "connect", "connect", "couple", "link", "abut", "connect", "interconnect", "intercommunication", "conduction", "fixation", "fastening" and the like should be understood in a broad sense, for example, they can be direct or indirect. For example, regarding connection, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly stated or limited. For example, regarding connectivity / conduction, it can be direct connectivity / conduction, or it can be indirect connectivity / conduction via an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0060] In the present application, unless otherwise clearly stated or limited, a component disposed on / installed on / located on / accommodated on / placed in, within, inside, etc. another component may be any of the following two situations: a part or most of the one component is located in the other component; and the one component is completely accommodated in the other component.

[0061] Although the present application is described in detail using the above-mentioned embodiments, it is obvious to those skilled in the art that the present application is not limited to the embodiments described in this specification. The present application can be modified and implemented as a modified embodiment without departing from the subject matter and scope of the present application as determined by the claims. Therefore, the description in this specification is for the purpose of illustration and does not have any restrictive meaning for the present application.

Claims

1. A gear ring mounting structure, characterized in that: include: Housing (4); A gear ring (1), the gear ring (1) being mounted on the housing (4) via a spline; a snap ring (2), the snap ring (2) being mounted on the inner circumference of the housing (4), the snap ring (2) being arranged on the radially outer side of the gear ring (1), the snap ring (2) and the gear ring (1) at least partially overlapping in the radial direction of the gear ring (1), thereby limiting the movement of the gear ring (1) along the axial direction (A) of the housing (4); and A snap ring anti-slip ring (3), the snap ring anti-slip ring (3) is installed on the outer periphery of the gear ring (1), the snap ring anti-slip ring (3) is arranged on the radial inner side of the snap ring (2), the snap ring (2) and the snap ring anti-slip ring (3) partially or completely overlap in the axial direction of the gear ring (1), and the snap ring anti-slip ring (3) can limit the snap ring (2) from shrinking and deforming radially inward, thereby preventing the snap ring (2) from falling off the housing (4).

2. The gear ring mounting structure according to claim 1, characterized in that: The inner circumference of the housing (4) is provided with a snap ring groove (41), the snap ring (2) is embedded in the snap ring groove (41), and the snap ring groove (41) axially fixes the snap ring (2). The outer periphery of the gear ring (1) is provided with an anti-slip ring groove (13), the snap ring anti-slip ring (3) is embedded in the anti-slip ring groove (13), and the anti-slip ring groove (13) axially fixes the snap ring anti-slip ring (3).

3. The gear ring mounting structure according to claim 2, characterized in that: The snap ring anti-slip ring (3) and the snap ring (2) are spaced apart in the radial direction of the snap ring (2), and a radial gap between the snap ring anti-slip ring (3) and the snap ring (2) is less than or equal to a depth of the snap ring (2) embedded in the snap ring groove (41).

4. The gear ring mounting structure according to claim 1, characterized in that: The snap ring anti-slip ring (3) does not contact the housing (4).

5. The gear ring mounting structure according to claim 2, characterized in that: The outer periphery of the gear ring (1) is provided with an external spline (12), and the external spline (12) is located in the middle position of the gear ring (1) in the axial direction. The anti-dropping ring groove (13) is arranged on one axial side of the external spline (12). The housing (4) is provided with a shoulder (42) for axially limiting the gear ring (1); the shoulder (42) is arranged on the other axial side of the gear ring (1).

6. The gear ring mounting structure according to claim 5, characterized in that: When viewed along the axial direction (A) of the gear ring (1), the retaining ring (2) blocks a portion of the external spline (12), thereby limiting the movement of the gear ring (1) along the axial direction (A).

7. The gear ring mounting structure according to claim 2, characterized in that: The snap ring (2) is elastic. In a natural state, the outer diameter of the snap ring (2) is larger than the inner diameter of the side wall portion on one axial side of the snap ring groove (41), so that the snap ring (2) is inserted into the snap ring groove (41) after elastic deformation. The snap ring anti-slip ring (3) is elastic. In a natural state, the inner diameter of the snap ring anti-slip ring (3) is smaller than the outer diameter of the side wall portion on one axial side of the anti-slip ring groove (13), so that the snap ring anti-slip ring (3) can be inserted into the anti-slip ring groove (13) after elastic deformation.

8. The gear ring mounting structure according to claim 1, characterized in that: The snap ring (2) is a C-shaped ring having a snap ring opening (21), and the snap ring anti-slip ring (3) is a C-shaped ring having an anti-slip ring opening (31).

9. A gear box, characterized in that: The gear box comprises the ring gear mounting structure according to any one of claims 1 to 8, and the ring gear is the ring gear of a planetary gear set.

10. A vehicle electric bridge drive system, characterized in that: include: Motor; as well as The gearbox as claimed in claim 9.

Images