Henan Tongxin Transmission Co., Ltd., founded in 2001, is located in the Economic and Technological Development Zone of Xuchang City, Henan Province, covering an area of 80000 square meters. It is a national "specialized, refined, unique, and new" small giant enterprise and a national high-tech enterprise. And officially listed on the Beijing Stock Exchange on November 15, 2021.

The company has its own 'technology center', dedicated to improving product quality and constantly innovating technical processes. With over 40 patented properties, we have pioneered the forging of blank raw materials with "hollow cores and no waste edges" in the industry, and our technology has reached the international priority level. The company relies on advanced production technology, sophisticated equipment, efficient production organization capabilities, strict quality control system, and excellent full-service model; With the quality policy of "pursuing zero defects and satisfying customers", we aim to build our enterprise into a specialized transmission shaft service platform.

Background technology:
The main drive shaft of front commercial vehicles is generally divided into two or three sections, and each section of the drive shaft is connected by a universal joint and fixed to the frame through an intermediate support structure. The intermediate support structure can compensate for installation errors of the transmission shaft and displacement caused by engine movement or frame deformation during vehicle operation. When the transmission shaft transmits power, it will produce forced vibration due to its own imbalance or assembly error. This part of the vibration will be transmitted upward to the vehicle body through the intermediate support structure, generating structural vibration and increasing the vibration noise inside the vehicle, resulting in poor driving experience.

The Chinese patent with authorization announcement number CN205651969U discloses a transmission shaft intermediate support device, which includes an installation bracket and an intermediate support assembly. The installation bracket is provided with a vertical plate and a horizontal plate, and the vertical plate is provided with bolt holes for connecting with the frame crossbeam. The horizontal plate is provided with an arc-shaped installation surface for installing the intermediate support assembly; The intermediate support assembly includes a protective band, a damping rubber pad, a bearing seat, and bearings. The intermediate support assembly is installed on the curved installation surface of the transverse plate through the protective band. When the support device is in use, the installation bracket is directly connected to the frame crossbeam through bolts, which is a rigid connection. When the amplitude of the transmission shaft is large, the vibration will be transmitted to the installation bracket through the rubber pad and then to the frame, increasing the vehicle's vibration and noise.

Technical implementation elements:
The purpose of this utility model is to provide a transmission shaft support structure to solve the problem of poor vibration reduction effect of existing support devices; Meanwhile, the present utility model also provides a vehicle to solve the problems of severe vibration and loud noise in existing vehicles.

To achieve the above objectives, the technical solution of the transmission shaft support structure of the present utility model is:
The support structure of the transmission shaft includes a crossbeam and an intermediate support seat installed on the crossbeam. The intermediate support seat includes a U-shaped frame connected to the crossbeam and a bearing set in the U-shaped frame. A damping rubber pad is provided between the bearing and the U-shaped frame, and the bearing inner hole forms a perforation for the transmission shaft to pass through. The two ends of the crossbeam are respectively connected to the longitudinal beam of the frame through the damping structure.

The vibration generated by the transmission shaft is first subjected to primary vibration reduction through the damping rubber pad between the bearing and the U-shaped frame, reducing the vibration transmitted to the crossbeam; The vibration transmitted to the crossbeam is then subjected to secondary vibration reduction through the vibration reduction structures at both ends of the crossbeam, further reducing the vibration transmitted to the frame. The two-stage vibration reduction greatly reduces the final vibration transmitted to the frame, and the vibration reduction effect is significant.

Furthermore, the vibration reduction structure comprises an upper fixing plate for connecting with the crossbeam and a lower fixing plate for connecting with the longitudinal beam of the frame, with a vibration reduction adhesive layer between the upper and lower fixing plates. It can reduce vibration from multiple directions for better damping effect.

Furthermore, the upper fixing plate is U-shaped, with the U-shaped upper fixing plate extending in the front to back direction and opening downwards. The lower fixing plate is L-shaped, with the vertical edge of the L-shaped lower fixing plate parallel to the two side groove walls of the U-shaped upper fixing plate and overlapping with one side groove wall. When the vibration is severe, a stop fit can be formed between the L-shaped lower fixing plate and the U-shaped upper fixing plate, which can alleviate the vibration to a certain extent.

The crossbeam is provided with crossbeam perforations, and the upper fixing plate is provided with connecting bolts protruding upward and passing through the crossbeam perforations. The connecting bolts form the connecting structure of the upper fixing plate for connecting with the crossbeam; The lower fixing plate is equipped with connecting ears protruding outward in the front to back direction, and there are connecting ear perforations on the connecting ears for connecting components to pass through. The connecting ears form the connection structure of the lower fixing plate for connecting with the longitudinal beam of the frame.

On the basis of any of the above schemes, the U-shaped frame is provided with elongated holes extending in the front to back direction at the edge ears on both sides, and connected to the crossbeam through the elongated holes. The installation position of the U-shaped frame on the crossbeam can be flexibly adjusted.

On the basis of any of the above schemes, the crossbeam adopts a U-shaped channel steel structure, with the opening of the U-shaped channel steel facing forward or backward, and the middle support seat and vibration reduction structure are both connected to the lower groove wall of the U-shaped channel steel.

Henan Tongxin Transmission Co., Ltd., founded in 2001, is located in the Economic and Technological Development Zone of Xuchang City, Henan Province, covering an area of 80000 square meters. It is a national "specialized, refined, unique, and new" small giant enterprise and a national high-tech enterprise. And officially listed on the Beijing Stock Exchange on November 15, 2021.

The company has its own 'technology center', dedicated to improving product quality and constantly innovating technical processes. With over 40 patented properties, we have pioneered the forging of blank raw materials with "hollow cores and no waste edges" in the industry, and our technology has reached the international priority level. The company relies on advanced production technology, sophisticated equipment, efficient production organization capabilities, strict quality control system, and excellent full-service model; With the quality policy of "pursuing zero defects and satisfying customers", we aim to build our enterprise into a specialized transmission shaft service platform.