CN202690981U - Floating mechanism for main shaft of twin countershaft transmission - Google Patents

Abstract

A floating mechanism for a main shaft of a double countershaft transmission, comprising a main shaft connected to an input shaft, the end of the main shaft being fixedly mounted on a bearing on an output shaft through an integral joint bearing unit, the integral joint bearing unit comprising a bearing outer ring, Self-locking springs, ball-end rods, and the bearing outer ring is located in the inner hole of the main shaft. The bearing outer ring includes two hemispheres split along the axis. The two hemispheres are fixed and connected as one by the self-locking spring. The ball head part of the ball head rod is installed inside, the outer ring of the bearing is axially positioned by the joint bearing pressure ring, the joint bearing pressure ring is welded and fixed to the end of the main shaft along the circumference, and the rod body part of the ball head rod It is axially positioned and connected with the output shaft through a lock nut. The beneficial effects of the utility model are: the outer ring of the bearing and the ball head rod are assembled into an integral unit structure, which is simple in structure, free from adjustment, and easy to assemble. It can not only realize flexible floating, but also realize accurate positioning of the axial direction of the main shaft.

Description

Floating mechanism for main shaft of double countershaft transmission

technical field

The utility model relates to a floating mechanism for a main shaft of a double intermediate shaft transmission. the

Background technique

In the existing double countershaft transmission, in order to overcome the uneven load of the two auxiliary shaft assemblies, the main shaft must have a float. At present, the rear end of the main shaft is either rigidly connected, or the structure of the floating mechanism at the rear end of the main shaft is scattered. The existing technical solution closest to this The technology is: the publication number is 201103674, and the patent name is: a utility model patent for a floating structure for a transmission. Stuck, causing the spindle to break due to sticking.

Contents of the invention

The utility model aims at the deficiencies of the prior art, and provides a technical scheme of a floating mechanism for a main shaft of a double countershaft transmission with simple structure, easy assembly and flexible floating.

The utility model is realized through the following technical measures: a floating mechanism for the main shaft of a double intermediate shaft transmission, including a main shaft connected to the input shaft, the end of the main shaft is fixedly installed on the bearing on the output shaft through an integral joint bearing unit , the integral key bearing unit includes a bearing outer ring, a self-locking spring, and a ball stud, the bearing outer ring is located in the inner hole of the main shaft, and the bearing outer ring includes two hemispheres split along the axis, The two hemispheres are fixedly connected as a whole by a self-locking spring, and the ball head part of the ball head rod is installed in the ball cavity of the outer ring of the bearing, and the outer ring of the bearing is axially positioned by the joint bearing pressure ring, and the joint bearing The pressure ring is welded and fixed to the end of the main shaft along the circumference, and the rod body part of the ball stud is axially positioned and connected to the output shaft through a lock nut.

A further improvement of the utility model is that a fillet transition part is provided between the ball head part and the rod body part of the above-mentioned ball head rod, and the ball head part and the fillet transition part are processed with an induction hardening layer through an induction hardening process.

The thickness of the above-mentioned induction hardening layer is: 3-5mm.

A further improvement of the utility model is that the axial movement of the above-mentioned ball stud is 0.05-0.09mm.

A further improvement of the present invention is that the bearing swing angle α of the above-mentioned integral joint bearing unit is 6 degrees.

A further improvement of the utility model is that a floating gap is provided between the front end of the main shaft and the bushing of the input shaft. the

The beneficial effects of the utility model are: the outer ring of the bearing and the ball head rod are assembled into an integral unit structure, which is simple in structure, free from adjustment, and easy to assemble, and can not only realize flexible floating, but also realize accurate positioning of the axial direction of the main shaft.

Description of drawings

Fig. 1 is a schematic structural view of a specific embodiment of the present invention.

FIG. 2 is a schematic diagram of the enlarged structure of part A in FIG. 1 .

Fig. 3 is a schematic structural view of the integral joint bearing unit in the specific embodiment of the present invention.

Fig. 4 is a schematic exploded view of the structure of the integral joint bearing unit in the specific embodiment of the present invention.

Fig. 5 is a schematic cutaway view of the ball head rod in the specific embodiment of the present invention.

In the figure, 1. Input shaft, 2. Main shaft, 3. Bushing, 4. Integral joint bearing unit, 5. Output shaft, 6. Bearing, 7. Bearing outer ring, 8. Self-locking spring, 9. Ball head Part, 10, rod body part, 11, joint bearing pressure ring, 12, lock nut, 13, fillet transition part, 14, induction hardening layer.

Detailed ways

In order to clearly illustrate the technical features of the solution, the solution will be described below through a specific implementation manner.

As shown in the accompanying drawings, a floating mechanism for the main shaft of a double countershaft transmission includes a main shaft 2 connected to the input shaft 1, a floating gap is provided between the front end of the main shaft 2 and the bushing 3 of the input shaft 1, and the main shaft 2 The end is fixedly installed on the bearing 6 on the output shaft 5 through an integral joint bearing unit 4. The integral key bearing unit 4 includes a bearing outer ring 7, a self-locking spring 8, and a ball stud. The bearing outer ring 7 is located at In the inner hole of the main shaft, the bearing outer ring 7 includes two hemispheres split along the axis, and the two hemispheres are fixedly connected as a whole by a self-locking spring 8. The ball cavity of the bearing outer ring 7 is installed with The ball head part 9 of the ball stud, the bearing outer ring 7 is axially positioned by the joint bearing pressure ring 11, and the joint bearing pressure ring 11 is welded and fixed to the end of the main shaft 2 along the circumference. The shaft part 10 is axially positioned and connected to the output shaft 5 through a lock nut 12 .

Wherein, a fillet transition portion 13 is provided between the ball head portion 9 and the shaft portion 10 of the ball head rod, and the ball head portion 9 and the fillet transition portion 13 are processed with an induction hardening layer 14 through an induction hardening process, and the induction hardening layer 14 has a thickness of 3-5mm.

The axial displacement of the ball head rod is 0.05-0.09 mm, and the bearing swing angle α of the integral joint bearing unit is 6 degrees.

The undescribed technical features of the utility model can be realized by or using the prior art, so they will not be repeated here. Of course, the above description is not a limitation of the utility model, and the utility model is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary skilled persons within the essential scope of the present utility model shall also belong to the protection scope of the present utility model.

Claims (6)

1. A floating mechanism for the main shaft of a double countershaft transmission, comprising a main shaft connected to the input shaft, characterized in that the end of the main shaft is fixedly installed on the bearing on the output shaft through an integral joint bearing unit, and the integral The joint bearing unit includes a bearing outer ring, a self-locking spring, and a ball stud. The bearing outer ring is located in the inner hole of the main shaft. The bearing outer ring includes two hemispheres split along the axis, and the two hemispheres are The ball head part of the ball head rod is installed in the ball cavity of the outer ring of the bearing, the outer ring of the bearing is axially positioned by the joint bearing pressure ring, and the joint bearing pressure ring is along the circumference and The end of the main shaft is fixed by welding, and the rod body part of the ball stud is axially positioned and connected with the output shaft through a lock nut. 2. The floating mechanism for the main shaft of double countershaft transmission according to claim 1, characterized in that, a fillet transition portion is provided between the ball head part and the rod body part of the ball head rod, and the ball head part and the circle The corner transition portion is processed with an induction hardened layer by an induction hardening process. 3 . The floating mechanism for the main shaft of the double countershaft transmission according to claim 2 , wherein the thickness of the induction hardened layer is 3-5 mm. 4 . 4. The floating mechanism for the main shaft of the double countershaft transmission according to claim 1 or 2, characterized in that the axial displacement of the ball stud is 0.05-0.09 mm. 5 . The floating mechanism for the main shaft of a double countershaft transmission according to claim 1 or 2 , wherein the bearing swing angle α of the integral joint bearing unit is 6 degrees. 6 . 6 . The floating mechanism for the main shaft of the dual countershaft transmission according to claim 1 , wherein a floating gap is provided between the front end of the main shaft and the bushing of the input shaft. 7 .

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