CN-224210830-U - Connecting structure of gear ring and hub

Abstract

The utility model relates to the technical field of automobile axles and discloses a connecting structure of a gear ring and a hub, which comprises the gear ring and the hub, wherein the gear ring comprises a ring body and grid rings arranged on the outer end face of the ring body, at least two threaded holes are circumferentially arrayed on the ring body, the hub is turned at the installation position of the gear ring to form a positioning groove, each threaded hole is connected with a screw in a matched mode, and the tail end of the screw is locked in the positioning groove. The mechanical locking of the screw and the positioning groove directly supplements the fastening capability of the press fit. Even if the local area of the press fit is invalid due to roundness error, the screw can still force to restrict the relative displacement of the gear ring and the hub through the pretightening force, so that the loosening risk is avoided. In addition, when the brake generates heat or the environmental temperature rises, under the condition of road surface jolt or transmission impact load, the fit clearance between the gear ring and the hub is enlarged, and the connection reliability of the gear ring and the hub can be still maintained by mechanical locking of the screw.

Inventors

• ZHANG YAOHUA
• LIU SONGLING
• CHEN JIANFENG
• Li Zhuoen

Assignees

• 广东何氏协力机械制造股份有限公司

Dates

Publication Date

20260508

Application Date

20250513

Claims (6)

1. 1. The utility model provides a connection structure of ring gear and wheel hub, includes ring gear and wheel hub, its characterized in that, the ring gear includes the ring body and sets up the net circle on the outer terminal surface of ring body, circumference array has arranged two at least screw holes on the ring body, wheel hub forms a constant head tank in the installation department turning of ring gear, and every screw hole cooperation is connected with the screw, and the tail end of screw locks in the constant head tank.
2. 2. The structure for connecting a ring gear and a hub according to claim 1, wherein the positioning groove has a V-shaped structure in a cross section of the positioning groove.
3. 3. The structure for connecting a ring gear and a hub according to claim 1, wherein the positioning groove has an isosceles trapezoid structure in a cross section of the positioning groove.
4. 4. A structure for connecting a ring gear and a hub according to claim 3, wherein the positioning groove comprises a bottom groove surface and two guiding inclined surfaces respectively provided on the left and right sides of the bottom groove surface.
5. 5. The structure for connecting a ring gear and a hub according to claim 1, wherein three screw holes are provided.
6. 6. The structure for connecting a ring gear and a hub according to claim 5, wherein the threaded hole is M6 gauge.

Description

Connecting structure of gear ring and hub Technical Field The utility model relates to the technical field of automobile axles, in particular to a connecting structure of a gear ring and a hub. Background In the transmission or braking system of a trailer, the ring gear is usually required as a critical transmission component to achieve a high-precision, high-reliability connection with the hub to ensure stability of power transmission or signal acquisition. At present, a stamping process is widely adopted in the market to manufacture the gear ring, and the process is widely applied due to the advantages of high production efficiency, low cost and the like. However, as shown in fig. 4, due to the characteristics of the stamping process, the ring gear 1 is prone to problems such as mold positioning deviation and uneven pressure distribution during the manufacturing process, so that the overall roundness of the inner circle 14 (the inner hole matched with the hub) is insufficient, and the shape and position errors such as excessive ovality, local concave or convex appearance of the inner circle are particularly shown. When the gear ring with insufficient roundness is assembled with the hub, the contact state of the two matching surfaces is uneven, namely, the local area can generate stress concentration due to overlarge interference, and the other area can be not tightly attached due to overlarge gap. Such mating imperfections can significantly reduce the reliability of the connection of the ring gear to the hub. In the actual running process of the trailer, the hub and the gear ring need to bear the compound working conditions of high temperature (such as friction heat generation in the braking process and environment temperature rise in long-time running) and strong vibration (road bump and periodic impact load of a transmission system) for a long time. Under the severe conditions, the interference attenuation and the vibration load induced micro-sliding abrasion of the matching surface of the gear ring and the hub are easy to be caused by thermal expansion, and finally the connection loosening phenomenon occurs. The gear ring is loosened, so that transmission failure or abnormal sensor signals can be caused, and even a trailer driving safety accident can be caused when the gear ring is seriously used, and meanwhile, the use cost of a user can be increased due to frequent maintenance and replacement. In order to solve the above problems, in the prior art, attempts have been made to improve the roundness of the mounting inner circle of the ring gear by optimizing the design of the stamping die or adjusting the process parameters, but the roundness improvement effect is limited due to the limitations of the stamping process itself. Therefore, a connection structure designed for the characteristic of insufficient roundness of the stamped gear ring is needed to improve the connection reliability of the gear ring and the hub under the working conditions of high temperature and strong vibration. It can be seen that there is a need for improvements and improvements in the art. Disclosure of utility model In view of the above-mentioned shortcomings of the prior art, an object of the present utility model is to provide a connection structure of a ring gear and a hub, which enhances connection reliability of the ring gear and the hub. In order to achieve the above purpose, the utility model adopts the following technical scheme: The utility model provides a connection structure of ring gear and wheel hub, includes ring gear and wheel hub, the ring gear includes the ring body and sets up the net circle on the outer terminal surface of ring body, two at least screw holes have been arranged to the circumference array on the ring body, wheel hub forms a constant head tank in the installation department turning of ring gear, and every screw hole cooperation is connected with the screw, and the tail end of screw locks in the constant head tank. As a further improvement of the technical scheme, the positioning groove is of a V-shaped structure under the cross section of the positioning groove. As a further improvement of the technical scheme, the positioning groove is in an isosceles trapezoid structure under the cross section of the positioning groove. As a further improvement of the technical scheme, the positioning groove comprises a bottom groove surface and two guide inclined surfaces respectively arranged at the left side and the right side of the bottom groove surface. As a further improvement of the technical scheme, three threaded holes are formed. As a further improvement of the technical scheme, the threaded hole is of M6 specification. The connecting structure of the gear ring and the hub has the beneficial effects that the fastening capability of press fit is directly supplemented through mechanical locking of the screw and the positioning groove. Even if the local area of the press fit is invalid due to roundn