CN204153090U - Gear transmission shaft device - Google Patents

Abstract

The utility model relates to a gear transmission shaft device, which includes a box body and a gear transmission shaft arranged in the box body. Sub-bearings, spacer sleeves, tapered roller bearings A, spacer rings and tapered roller bearings B, and are fastened on the transmission shaft by lock nuts; the convex ring of the inner cavity of the box is provided with a spring cavity for installing springs and a circumferential groove with a retaining ring installed. The utility model has the advantages of simple structure, easy manufacture and assembly, adopts cylindrical roller bearings and two back-to-back tapered roller bearings for support, so that the gear transmission shaft device can bear large radial force and axial force at high speed, Moreover, the gear transmission has good meshing characteristics, improves the transmission efficiency and service life of the gear transmission shaft, reduces the use and maintenance cost of the gear transmission shaft device, and has good reliability and economy.

Description

gear drive shaft unit

technical field

The utility model relates to a transmission shaft device, in particular to a gear transmission shaft device.

Background technique

The gear transmission device using rolling bearings requires the rolling bearings to have a long service life, high operating speed, small footprint, and easy installation. It must also bear large axial force and large radial force when running at high speed. Conventional rolling bearing arrangements for supporting gear transmission shafts include: two back-to-back or face-to-face tapered roller bearings are used for support, which cannot meet the requirements of bearing service life and high speed at the same time; the second is to use two face-to-face tapered roller bearings plus a Cylindrical roller bearings take up a lot of space, and the support span of the gear transmission shaft is small, which is not conducive to gear meshing transmission; secondly, the support method of two cylindrical roller bearings plus a four-point contact ball bearing meets the high speed requirements , but the bearing life does not meet the requirements.

Contents of the invention

The purpose of this utility model is to overcome the disadvantages of the above-mentioned technologies, and provide a gear transmission shaft device with simple structure, reasonable layout, small occupied space, high allowable rotating speed and long service life.

The gear transmission shaft device of the present utility model includes a box body and a gear transmission shaft arranged in the box body, and is characterized in that: the box body is provided with a first inner cavity and a second inner cavity; the gear transmission shaft It consists of a gear, a large shaft and a small shaft; the gear transmission shaft is provided with a cylindrical roller bearing, a tapered roller bearing A and a tapered roller bearing B in sequence; the cylindrical roller bearing is placed in the cylindrical roller bearing Between the inner ring and the outer ring of the cylindrical roller bearing; the inner ring of the cylindrical roller bearing is sleeved on the large shaft, and the outer ring of the cylindrical roller bearing is in contact with the inner circumferential surface of the first inner cavity of the box; the said Tapered roller bearing A is placed between the inner ring of tapered roller bearing A and the outer ring of tapered roller bearing A. The inner ring of tapered roller bearing A is sleeved on the small shaft, and the outer ring of tapered roller bearing A is covered with a bushing. There is a gap of 0.01 to 0.05 mm between the outer peripheral surface of the bushing and the inner peripheral surface of the first inner cavity of the box; the tapered roller bearing B is placed on the inner ring of the tapered roller bearing B and the tapered roller bearing B Between the outer rings, the inner ring of the tapered roller bearing B is sleeved on the small shaft, and the outer ring of the tapered roller bearing B is in contact with the inner peripheral surface of the second inner cavity of the box; the cylindrical roller bearing, tapered roller Bearing A and tapered roller bearing B are fastened on the gear drive shaft by lock nuts.

In order to better achieve the above purpose:

A spacer sleeve is provided on the gear drive shaft between the inner ring of the cylindrical roller bearing and the inner ring of the tapered roller bearing A.

A spacer ring is provided on the gear transmission shaft between the inner ring of the tapered roller bearing A and the inner ring of the tapered roller bearing B.

The bushing is formed by connecting a first inner ring segment and a second inner ring segment, and the inner diameter of the first inner ring segment is larger than the inner diameter of the second inner ring segment.

The convex ring between the first inner cavity and the second inner cavity of the box body is provided with a spring cavity, and a spring is placed in the spring cavity, and the two ends of the spring are connected with the outer ring of the tapered roller bearing A and the spring cavity respectively. The bottom surface of the cavity is in contact;

The inner surface of the box is provided with a circumferential ring groove corresponding to the right end face of the outer ring of the cylindrical roller bearing, and a retaining ring is installed in the circumferential ring groove, and the retaining ring is close to the right end face of the outer ring of the cylindrical roller bearing to prevent the cylindrical roller The bearing slides axially.

The tapered roller bearing A and the tapered roller bearing B are installed back to back.

The gear transmission shaft device of the utility model has simple structure, easy manufacture and assembly, adopts a cylindrical roller bearing plus two back-to-back support structures of tapered roller bearings, so that the gear transmission shaft device can withstand large radial forces at high speeds. Force and axial force, and make the gear transmission have good meshing characteristics, improve the efficiency of the gear transmission and the service life of the gear transmission shaft device, reduce the use and maintenance costs of the gear transmission shaft device, and have good reliability and economy.

Instructions attached

Fig. 1 is a structural view of the utility model.

Figure 2 is a schematic structural view of the bushing.

Figure 3 is a schematic structural view of the box.

Fig. 4 is a structural schematic diagram of a gear transmission shaft.

In the figure: 1. gear transmission shaft, 2. box body, 3. cylindrical roller bearing, 31. inner ring of cylindrical roller bearing, 32. outer ring of cylindrical roller bearing, 4. retaining ring, 44. circumferential ring groove, 5 , spacer sleeve, 6, bushing, 7, tapered roller bearing A, 71, inner ring of tapered roller bearing A, 72, outer ring of tapered roller bearing A, 8, tapered roller bearing B, 81, tapered roller Bearing B inner ring, 82, tapered roller bearing B outer ring, 9, spring, 99, spring cavity, 10, spacer ring, 11, lock washer, 12, lock nut, 13, front face, 14, Rear end surface, 15, first inner ring segment, 16, second inner ring segment, 17, first inner end face, 18, second inner end face, 19, first inner cavity, 20, second inner cavity, 21 , gear, 22, large shaft, 23, small shaft, 24, convex ring.

Detailed ways

The gear transmission shaft device of the utility model comprises a box body 2 and a gear transmission shaft 1 arranged in the box body 2 . The box body 2 is composed of a first inner cavity 19 and a second inner cavity 20 . The gear transmission shaft 1 is composed of a gear 21 , a large shaft 22 and a small shaft 23 . A cylindrical roller bearing 3 , a tapered roller bearing A7 and a tapered roller bearing B8 are sequentially arranged on the gear transmission shaft 1 . The cylindrical roller bearing 3 is placed between the inner ring 31 of the cylindrical roller bearing and the outer ring 32 of the cylindrical roller bearing. The inner ring 31 of the cylindrical roller bearing is sleeved on the large shaft 22 , and the outer ring 32 of the cylindrical roller bearing is in contact with the inner peripheral surface of the first inner cavity 19 of the box body 2 . The tapered roller bearing A7 is placed between the tapered roller bearing A inner ring 71 and the tapered roller bearing A outer ring 72, the tapered roller bearing A inner ring 71 is set on the small shaft 23, and the tapered roller bearing A outer ring 72 A bushing 6 is sheathed on the top, and there is a gap of 0.03 mm between the outer peripheral surface of the bushing 6 and the inner peripheral surface of the first inner cavity 19 of the box body 2 . The tapered roller bearing B7 is placed between the tapered roller bearing B inner ring 71 and the tapered roller bearing B outer ring 72, the tapered roller bearing B inner ring 71 is set on the small shaft 23, and the tapered roller bearing B outer ring 72 It is in contact with the inner peripheral surface of the second inner cavity 20 of the box body 2 . Cylindrical roller bearing 3, tapered roller bearing A7 and tapered roller bearing B8 are fastened on the gear drive shaft 1 by lock nut 12.

A spacer sleeve 5 is provided on the gear transmission shaft 1 between the inner ring 31 of the cylindrical roller bearing and the inner ring 71 of the tapered roller bearing A.

A spacer ring 10 is provided on the gear transmission shaft 1 between the inner ring 71 of the tapered roller bearing A and the inner ring 72 of the tapered roller bearing B.

The bushing 6 is formed by connecting a first inner ring segment 15 and a second inner ring segment 16 , the inner diameter of the first inner ring segment 15 is larger than the inner diameter of the second inner ring segment 16 .

The convex ring 24 between the first inner cavity 19 and the second inner cavity 20 of the box body 2 is provided with a spring concave cavity 99, and a spring 9 is placed in the spring concave cavity 99, and the two ends of the spring 9 are connected with the tapered roller bearing A respectively. The outer ring 72 is in contact with the bottom surface of the spring cavity 99 .

The inner surface of the box body 2 is provided with a circumferential ring groove 44 corresponding to the right end face of the outer ring 32 of the cylindrical roller bearing. Prevent the cylindrical roller bearing 3 from sliding axially.

Tapered roller bearings A7 and B8 are installed back to back.

Claims (7)

1. a gear transmission shaft device, comprises casing (2) and is arranged on the gearing shaft (1) in casing (2), it is characterized in that: be provided with the first inner chamber (19) and the second inner chamber (20) in described casing (2); Described gearing shaft (1) is made up of gear (21), macro-axis (22) and little axle (23); Described gearing shaft (1) is provided with roller bearing (3), tapered roller bearing A(7 successively) and tapered roller bearing B(8); Described roller bearing (3) is placed between roller bearing inner ring (31) and roller bearing outer ring (32); Described roller bearing inner ring (31) is enclosed within macro-axis (22), and roller bearing outer ring (32) touch with the inner peripheral surface of first inner chamber (19) of casing (2); Described tapered roller bearing A(7) be placed between tapered roller bearing A inner ring (71) and tapered roller bearing A outer ring (72), tapered roller bearing A inner ring (71) is enclosed within little axle (23), the upper cover in tapered roller bearing A outer ring (72) has lining (6), has the gap of 0.01 ~ 0.05 millimeter between the inner peripheral surface of the outer circumferential face of lining (6) and first inner chamber (19) of casing (2); Described tapered roller bearing B(8) be placed between tapered roller bearing B inner ring (81) and tapered roller bearing B outer ring (82), tapered roller bearing B inner ring (81) is enclosed within little axle (23), and tapered roller bearing B outer ring (82) touches with the inner peripheral surface of second inner chamber (20) of casing (2); Described roller bearing (3), tapered roller bearing A(7) and tapered roller bearing B(8) be fixed tightly on gearing shaft (1) by locking nut (12).

2. gear transmission shaft device according to claim 1, is characterized in that: the gearing shaft (1) between described roller bearing inner ring (31) and tapered roller bearing A inner ring (71) is provided with spacer sleeve (5).

3. gear transmission shaft device according to claim 1, is characterized in that: the gearing shaft (1) between described tapered roller bearing A inner ring (71) and tapered roller bearing B inner ring (81) is provided with spacer ring (10).

4. gear transmission shaft device according to claim 1, it is characterized in that: described lining (6) is connected and composed by annulus section (16) in annulus section (15) and second in first, and in first, the internal diameter of annulus section (15) is greater than the internal diameter of annulus section (16) in second.

5. gear transmission shaft device according to claim 1, it is characterized in that: the bulge loop (24) between first inner chamber (19) of described casing (2) and the second inner chamber (20) is provided with spring cavity (99), be placed with spring (9) in spring cavity (99), spring (9) two ends touch with the bottom surface of tapered roller bearing A outer ring (71) and spring cavity (99) respectively.

6. gear transmission shaft device according to claim 1, it is characterized in that: the right side of described casing (2) internal surface Correspondent cy linder roller bearing outer ring (32) is provided with circumferential groove in its end portion (44), back-up ring (4) is installed in circumferential groove in its end portion (44), back-up ring (4), near the right side of roller bearing outer ring (32), prevents roller bearing (3) from sliding axially.

7. gear transmission shaft device according to claim 1, is characterized in that: described tapered roller bearing A(7) and tapered roller bearing B(8) for install back-to-back.