Detachable connecting structure for outer parking gear and inner retainer of transmission

Abstract

The utility model discloses a detachable connecting structure for an outer parking gear and an inner retainer of a transmission, and belongs to the technical field of transmissions. A second check ring is placed on the upper surface of an inner boss of the outer parking gear, and the outer parking gear is sleeved on the outer side of the inner retainer through a spline. An annular protrusion is arranged at the lower end of the inner retainer, the upper surface of the annular protrusion is attached to the lower surface of the inner boss of the outer parking gear, a third check ring is arranged in a check ring groove in the upper end of the inner retainer, and the lower surface of the third check ring is attached to the upper surface of the inner boss of the outer parking gear. A first check ring is installed in a check ring groove in the upper end of the inner wall of the outer parking gear in a pressed mode, and the lower surface of the check ring is tightly attached to the upper surface of the second check ring. According to the utility model, the problem of non-detachability caused by traditional welding connection is solved. When a certain part in the outer parking gear or the inner retainer breaks down or needs to be maintained, only the faulty part needs to be detached and replaced or maintained independently, the maintenance cost is reduced, the maintenance time is shortened, and the maintenance efficiency and usability of equipment are improved.

Description

Technical Field

[0001] The utility model relates to a detachable connection structure between an external parking gear and an internal cage of a transmission, belonging to the technical field of transmissions. Background Art

[0002] The connection method between the external parking gear and the internal cage of the internal parts of the transmission is crucial for ensuring the continuity and reliability of power transmission. However, the connection means widely adopted in the prior art often have the following significant defects when facing the working conditions with large axial thrust and compact space layout:

[0003] 1. Currently, for such high-load and space-limited connection requirements, the common solution is to adopt permanent connection methods such as welding. Although this method can effectively resist large axial thrust and ensure the stability of the connection, it also brings the disadvantage of non-detachability. Once a part in the external parking gear and the internal cage fails or needs maintenance, due to the irreversibility of the connection method, the entire assembly or even the entire transmission may need to be replaced, increasing the complexity and cost of maintenance.

[0004] 2. The non-detachability caused by welding connection makes it extremely difficult to repair or replace parts individually. In the modern automotive industry that pursues efficient and low-cost maintenance, this design obviously does not meet the requirements of sustainable development. Maintenance personnel have to adopt the time-consuming and laborious overall replacement strategy, which not only increases the downtime but also raises the operating cost.

[0005] 3. The component discard caused by overall replacement also brings problems of resource waste and environmental pollution. Many components that could have restored their functions through simple repair are forced to be scrapped due to the limitation of the connection method, exacerbating resource consumption and waste generation. Summary of the Utility Model

[0006] To solve the problems in the background art, the utility model provides a detachable connection structure between an external parking gear and an internal cage of a transmission.

[0007] To achieve the above object, the present utility model adopts the following technical solutions: A detachable connection structure between an external parking gear and an internal cage of a transmission, comprising a first snap ring, a second snap ring and a third snap ring; the second snap ring is placed on the upper surface of the inner boss of the external parking gear, and the external parking gear is sleeved on the outer side of the internal cage through a spline; the lower end of the internal cage is provided with an annular protrusion, the upper surface of the annular protrusion is in contact with the lower surface of the inner boss of the external parking gear, and the third snap ring is press-fitted in the snap ring groove at the upper end of the internal cage, and the lower surface of the third snap ring is in contact with the upper surface of the inner boss of the external parking gear; the second snap ring is tightly sleeved on the outer side of the third snap ring, and the first snap ring is press-fitted in the snap ring groove at the upper end of the inner wall of the external parking gear, and the lower surface of the first snap ring is in close contact with the upper surface of the second snap ring.

[0008] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0009] 1. By adopting a detachable connection structure, the present utility model solves the problem of non-detachability brought by traditional welding connections. When a certain part in the external parking gear or the internal cage fails or needs maintenance, there is no need to replace the entire transmission assembly. It is only necessary to separately disassemble and replace or repair the faulty part. This simplifies the maintenance process, reduces the maintenance difficulty, cuts down the maintenance cost and time, and improves the maintenance efficiency and usability of the equipment.

[0010] 2. Since the present utility model realizes the detachability and replaceability of components, it effectively avoids the discard of components and waste of resources caused by overall replacement. Many components that might have been forced to be scrapped due to connection method limitations can now continue to be used through simple repairs, thus reducing resource consumption and waste generation, meeting the requirements of modern automotive industry for sustainable development and environmental protection.

[0011] 3. Although the present utility model adopts a detachable design, through a carefully designed multi-layer snap ring structure (the first snap ring, the second snap ring and the third snap ring) and the close fit between the external parking gear and the internal cage (such as spline connection and annular protrusion contact), the reliability and stability of the connection structure are ensured. It can effectively resist large axial thrust, ensure the continuity and accuracy of power transmission, and meet the use requirements under high-load and space-limited working conditions. Description of the Drawings

[0012] Figure 1 is the structural schematic diagram of the present utility model. Detailed Embodiments

[0013] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0014] A detachable connection structure between an external parking gear and an internal cage of a transmission, comprising a first retaining ring 2, a second retaining ring 3, and a third retaining ring 4; the second retaining ring 3 is placed on the upper surface of the inner boss of the external parking gear 1, and the external parking gear 1 is sleeved on the outer side of the internal cage 5 through splines; a circular protrusion 6 is provided along the circumference at the lower end of the internal cage 5, and the upper surface of the circular protrusion 6 is in contact with the lower surface of the inner boss of the external parking gear 1. The circular protrusion 6 is used for axially limiting the external parking gear 1 to prevent the external parking gear 1 from moving downward; the third retaining ring 4 is press-fitted in the retaining ring groove at the upper end of the internal cage 5, and the lower surface of the third retaining ring 4 is in contact with the upper surface of the inner boss of the external parking gear 1; the second retaining ring 3 is tightly sleeved on the outside of the third retaining ring 4, and the third retaining ring 4 prevents the external parking gear 1 from relatively moving with the internal cage 5; the second retaining ring prevents the third retaining ring 4 from flying off the internal cage 5 due to centrifugal force during the rotation following the internal cage 5; the first retaining ring 2 is press-fitted in the retaining ring groove at the upper end of the inner wall of the external parking gear 1. Since the first retaining ring 2 is installed on the external parking gear 1 with an outer diameter, the first retaining ring 2 will not fly off due to centrifugal force during rotation. The lower surface of the first retaining ring 2 is in close contact with the upper surface of the second retaining ring 3. Because the second retaining ring 3 has no installation groove and will move around during rotation, the first retaining ring 2 is used to limit the second retaining ring 3.

[0015] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and can be implemented in other forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent conditions of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0016] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A detachable connection structure between an external parking gear and an internal cage of a transmission, characterized in that: It includes snap ring one (2), snap ring two (3) and snap ring three (4); the snap ring two (3) is placed on the upper surface of the inner boss of the external parking gear (1), and the external parking gear (1) is sleeved on the outside of the inner cage (5) through a spline; an annular protrusion (6) is provided at the lower end of the inner cage (5), the upper surface of the annular protrusion (6) is in contact with the lower surface of the inner boss of the external parking gear (1), a snap ring three (4) is press-fitted in the snap ring groove at the upper end of the inner cage (5), and the lower surface of the snap ring three (4) is in contact with the upper surface of the inner boss of the external parking gear (1); the snap ring two (3) is tightly sleeved on the outside of the snap ring three (4), a snap ring one (2) is press-fitted in the snap ring groove at the upper end of the inner wall of the external parking gear (1), and the lower surface of the snap ring one (2) is in close contact with the upper surface of the snap ring two (3).

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