Connecting structure of reverse gear and reverse gear hub
By adopting an interference-matched and press-fit connection structure between the reverse gear and the reverse gear hub, the early wear, loss of accuracy and high noise caused by welding is solved, and higher accuracy and lower noise are achieved.
Patent Information
- Application Number
- CN202422415940.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-08
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-10-08
AI Technical Summary
In the prior art, the welded connection between the reverse gear and the reverse gear hub leads to problems of early wear, loss of accuracy and high noise in the workpiece.
Using an interference fit and press-fit connection structure, the external and internal teeth are set at the corresponding positions of the reverse gear and the reverse gear hub, and the pressure-fit connection is carried out under the cooperation of the limit teeth and the limit groove to avoid welding.
It effectively avoids workpiece deformation and hardness caused by welding, maintains accuracy, reduces noise, and extends the service life of the parts.
Smart Images
Figure CN223019331U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of connection of two gear components, in particular to a connection structure between a reverse gear and a reverse gear hub. Background Art
[0002] The key component assembly gear in the power shift components of a large-horsepower tractor, the assembly gear includes a reverse gear and a reverse gear hub. Previously, when connecting the reverse gear and the reverse gear hub, hot welding was generally used ( Figure 3 as shown). Since the wall thickness of the welding area is relatively thin, during welding, the hardness of the workpiece in the heat-affected zone decreases, resulting in early wear of the workpiece, and the accuracy of the reverse gear is lost after welding, and there is a large noise during operation. Summary of the Invention
[0003] In order to overcome the deficiencies in the prior art, the utility model provides a connection structure between a reverse gear and a reverse gear hub, which comprises a reverse gear and a reverse gear hub. The outer surface of the right end of the reverse gear is provided with external teeth, the inner surface of the left end of the reverse gear hub is provided with internal teeth, the internal teeth and the external teeth are press-fitted together by interference fit, the inner surface of the left end of the reverse gear hub is provided with limiting teeth, and the outer surface of the right end of the reverse gear is provided with a limiting groove that cooperates with the limiting teeth.
[0004] In order to enable the two components to be better press-fitted together by interference fit, the tooth thickness interference amount H of the external teeth and the internal teeth is 0.05 mm - 0.11 mm.
[0005] Compared with the prior art, the beneficial effect of the utility model is that the welded part is changed to a special spline interference fit, and the reverse gear and the reverse gear hub are press-fitted into an assembly, thus avoiding workpiece deformation, loss of accuracy caused by welding or early wear of the workpiece caused by reduced hardness. At the same time, the noise during operation can be reduced, meeting the design requirements of the parts. Brief Description of the Drawings
[0006] Figure 1 is a schematic structural diagram of the utility model.
[0007] Figure 2 is a schematic diagram of the interference fit structure of the internal teeth and the external teeth.
[0008] Figure 3 is a schematic diagram of the original structure.
[0009] In the figure: reverse gear 1, reverse gear hub 2, limiting teeth 3, limiting groove 4, internal teeth 5, external teeth 6. Detailed Description of the Invention
[0010] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0011] In Figure 1 and Figure 2 a reverse gear and reverse gear hub connection structure, which includes a reverse gear 1 and a reverse gear hub 2. An external gear 6 is provided on the outer surface of the right end of the reverse gear 1, and an internal gear 5 is provided on the inner surface of the left end of the reverse gear hub 2. The internal gear 5 and the external gear 6 are press-fitted together by interference fit. A limiting tooth 3 is provided on the inner surface of the left end of the reverse gear hub 2, and a limiting groove 4 matching with the limiting tooth 3 is provided on the outer surface of the right end of the reverse gear 1.
[0012] Furthermore, the interference amount H of the tooth thickness between the external gear 6 and the internal gear 5 is 0.05 mm - 0.11 mm.
[0013] The connection between the reverse gear 1 and the reverse gear hub 2 is changed from the previous welded part to separately providing the external gear 6 and the internal gear 5, and the external gear 6 is press-fitted into the internal gear 5 by interference fit, thereby combining the reverse gear 1 and the reverse gear hub 2 into an assembled gear. This connection method avoids the loss of precision caused by workpiece deformation due to welding. At the same time, since welding is not used, the hardness at the connection is also maintained, avoiding early wear of the workpiece.
[0014] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.
Claims
1. A reverse gear and reverse gear hub connection structure, comprising a reverse gear (1) and a reverse gear hub (2), characterized in that: The outer surface of the right end of the reverse gear (1) is provided with external teeth (6), the inner surface of the left end of the reverse gear hub (2) is provided with internal teeth (5), the internal teeth (5) and the external teeth (6) are pressed together by interference fit, the inner surface of the left end of the reverse gear hub (2) is provided with limiting teeth (3), and the outer surface of the right end of the reverse gear (1) is provided with limiting grooves (4) that match the limiting teeth (3).
2. The reverse gear and reverse gear hub connection structure according to claim 1, characterized in that: The tooth thickness interference H of the external teeth (6) and the internal teeth (5) is 0.05 mm to 0.11 mm.