JPH04129917U - Horizontal shaft device for tracked vehicles - Google Patents

Abstract

(57) [Summary] [Purpose] To facilitate the assembly of a horizontal shaft device with a structure that allows adjustment of the preload amount of a tapered roller bearing outside the case. [Structure] A subassembly whose main components are a bevel gear 3, a main shaft 4, a pair of tapered roller bearings 5, a cage 10, and an inner ring of a cylindrical roller bearing 6 is charged through a hole made in one wall of the case 8. In order to do this, the cage 10 and the bevel gear 3 have a smaller outer diameter than the hole in the case 8. Also,
The outer diameter of the retainer 12 for applying preload to the tapered roller bearing 5 fitted in the cage 10 is smaller than the mounting hole of the cage 10 made in the case 8, and the outer diameter of the retainer 12 is smaller than the mounting hole of the cage 10 made in the case 8. Bevel gear 3 is attached to the joint surface of 8.
A shim 11 for position adjustment is inserted.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to the structure of a horizontal shaft device that has a bevel gear and a main shaft inside a case.

0002

[Conventional technology]

FIG. 2 is a sectional view of a main part of a conventional horizontal axis device. By bolt 1 and nut 2 The main shaft 18 to which the bevel gear 17 is fixed is supported by tapered roller bearings 19 at both ends. has been done.

0003 Of these bearings, the outer ring 19a on the left side of the figure is fitted into a retainer 20, and this A retainer 20 is fixed to a case 21. In addition, the right outer ring 19b is 22 and has a fitting diameter 21a larger than the outer diameter of the bevel gear 17. It is fixed to the case 21 via a retainer 23 installed in the base hole. Note that a shim 24 is provided on the joint surface between the retainer 20 and the case 21, and A shim 25 is inserted into the joint surface between the retainer 22 and the retainer 23.

0004 To assemble the horizontal shaft device with such a configuration, first bolt the bevel gear 17 onto the main shaft 18. 1 and nuts 2, and tapered roller bearings 19 are fitted to both ends. Also, Lite The outer rings 19a and 19b of the bearing are fitted into the inner rings 20 and 22, respectively, and the retainer is fitted into the outer rings 19a and 19b of the bearing, respectively. The retainer 22 is constructed by inserting a shim 25 of standard thickness into the joint surface and then bolting it onto the retainer 23. Fix it with the bolts 27. Next, the retainer 20 is fixed to the case 21 with bolts 26. At this time, A shim 24 of standard thickness is inserted into the mating surface. At this point, tilt the case 21 so that the B side in the figure is facing down, and connect the main shaft 18 and bevel gear. A subassembly such as 17 is inserted through the hole 21a of the case and fixed with a bolt 28. From this state, return the case 21 to its original position and rotate the main shaft 18 to generate friction torque. Measure. This torque is within the standard value of bearing preload, and Adjust the thickness of shims 24 and 25 so that the relative position with the bell pinion is appropriate. For this purpose, remove bolts 26 and 27 and increase the number of shims 24 and 25. reduce

[0005]

[Problem that the idea aims to solve]

In such a conventional structure, an appropriate amount of preload is applied to the bearing, and the bevel gear and bevel pin are In order to ensure the proper relative position of the nion, two shim adjustments were made within the narrow case. There is a need to do. Therefore, assembly is troublesome and workability is poor. In addition, in order to optimize both the bearing preload and the relative position of the bevel gear, adjustments must be made. is even more difficult and requires more man-hours. The present invention aims to solve this problem.

[0006]

[Means to solve the problem]

In order to achieve the above purpose, this invention has a bevel gear and a main shaft inside the case. In horizontal shaft devices, the main shaft, bevel gear, and a pair of conical A roller bearing, a cage that holds this bearing, and a cylindrical roller bearing fitted to the other end of the main shaft. Insert the subassembly whose main component is the inner ring into the hole made on one wall of the case. In order to , when the cage is attached to a hole made in the wall opposite to the hole of the case, A flange is formed to join to the inner surface of the case. Furthermore, there is a retainer for applying preload to a pair of tapered roller bearings fitted in the cage. The outside diameter of the cage should be smaller than the hole in which the cage is installed, and the outer diameter of the cage should be A shim for adjusting the position of the bevel gear is inserted into the joint surface of the case and the case.

[0007]

[Effect]

According to the above structure, in the horizontal shaft device, in addition to assembling the main shaft and bevel gear, Partial assembly including shim adjustment that applies preload to the tapered roller bearing fitted to the main shaft. This can be done outside the case where there is plenty of space.

[0008]

【Example】 The present invention will be described below with reference to an embodiment shown in FIG. The main shaft 4 has a bevel gear 3 fixed to it with bolts 1 and nuts 2, and has a pair of ends on both ends. It is supported by a tapered roller bearing 5 and a cylindrical roller bearing 6. The inner ring of the tapered roller bearing 5 that supports one of these is connected to the main shaft by a nut 7. It is fixed to. In addition, the outer ring is fitted into a cage 10 that is attached to the case 8 with bolts 9. The retainer 12 with the shim 11 of appropriate thickness inserted is tightened with the bolt 13, and the end It suppresses the face. Furthermore, the cylindrical roller bearing 6 supporting the other is bolted to the case 8. It is fitted into a retainer 15 attached at 14. Here, the outer diameter of the bevel gear 3 and the cage 10 is It has a smaller diameter structure than the hole 8a in the hole 8a. In addition, the outer diameter of the retainer 12 is The hole 8b of the case is made smaller in diameter than the hole 8b in which the hole 10 is attached.

[0009] To assemble a horizontal shaft device with such a structure, first attach the bevel gear 3 to the main shaft 4 by bolt 1. After fixing with nuts 2, the inner ring 6a of the cylindrical roller bearing is fitted. Next, insert the cage 10 fitted with the tapered roller bearing 5 into the main shaft 4, and tighten the nut 7 inside the cage 10. Fix the ring to the main shaft 4. Further, the outer ring of the tapered roller bearing 5 is connected to the retainer 12 by bolts. The end face is restrained by tightening the cage 10 with the joint 13, but at this time, the joint face By adjusting the thickness of the shim 11 inserted into the bearing, a specified amount of preload can be applied to the bearing. Ru. After completing these preparations, put the case 8 down with side A facing down, and open the hole 8a in the case. The above-mentioned subassembly around the main shaft is then loaded. Next, the rollers of the cylindrical roller bearing 6 and the outer Insert the retainer 15 fitted with the ring into the hole 8a of the case, and tighten the bolts 9 and 14 to the cage. 10 and retainer 15 are fixed to case 8. At this time, a shim 16 is inserted into the joint surface of the case 8 and the cage 10, and this thickness is By increasing or decreasing, the relative position between the bevel gear 3 and the bevel pinion (not shown) can be changed. Adjust so that it is appropriate. After completing the above work, raise case 8, return it to its original position, and assemble the horizontal shaft part. Standing is completed.

0010

[Effect of the idea]

In a horizontal shaft device with such a structure, shim adjustment is necessary to apply an appropriate amount of preload to the tapered roller bearing. This simplifies the assembly process as it can be done outside the case where there is ample space. In addition, the preload of the tapered roller bearing and the position adjustment of the bevel gear are performed using separate shims. Therefore, adjustment becomes easier and the number of man-hours is reduced.

[0011]

[Brief explanation of drawings]

FIG. 1 is a sectional view of a horizontal shaft device according to the present invention.

FIG. 2 is a cross-sectional view of a prior art transverse axis device.

[Explanation of symbols]

1, 9, 13, 14, 26, 27, 28 volts 2,7 Nut 3,17 Bevel gear 4,18 Main shaft 5,19 Tapered roller bearing 6 Cylindrical roller bearing 8,21 case 10 cage 11, 16, 24, 25 shim 12, 15, 20, 22, 23 retainer

Claims (1)

[Scope of utility model registration request] Claim 1: A horizontal shaft device having a bevel gear and a main shaft in a case, a main shaft, a bevel gear, a pair of tapered roller bearings fitted to one end of the main shaft, a cage holding the bearings, and a cage at the other end of the main shaft. In order to insert a subassembly whose main component is the inner ring of a fitted cylindrical roller bearing through a hole made in one wall of the case, the outer diameter of the cage and bevel gear is smaller than the hole in the case. In addition to the structure, the cage has a flange that joins to the inner surface of the case when the cage is installed in a hole made in a wall opposite to the hole of the case, and a pair of tapered rollers fitted in the cage. The outer diameter of the retainer for applying preload to the bearing is smaller than the hole in which the cage is mounted, and a shim for adjusting the position of the bevel gear is inserted into the joint surface between the flange of the cage and the case. Horizontal axis device for tracked vehicles.