CN214197180U - Gearbox matched with large-torque rear power takeoff - Google Patents

Abstract

The utility model provides a match gearbox of power takeoff behind big moment of torsion, when aiming at solving the gearbox and matching big moment of torsion power takeoff, the two rear bearings of gearbox adopt current deep groove ball bearing can't satisfy big bearing capacity operation requirement, and adopt four point contact ball bearing can't satisfy the technical problem that the inner circle compressed tightly the requirement. The gearbox comprises a gearbox secondary shaft, an auxiliary box driving gear and a rear bearing assembly, wherein the rear bearing assembly comprises a bearing support, a bearing positioning mechanism and a four-point contact ball bearing; the inner ring of the four-point contact ball bearing is of a split structure and comprises a front end of the inner ring of the bearing and a rear end of the inner ring of the bearing; the bearing positioning mechanism comprises a bearing inner ring pressing plate and a fastening piece; the front end of the bearing inner ring is attached to the step of the bearing support, and the rear end of the bearing inner ring is attached to the step of the bearing inner ring pressing plate and is pressed tightly through a fastener; in addition, the front end surface of the auxiliary box driving gear is provided with a mounting groove so as to facilitate the mounting of the fastening piece.

Description

Gearbox matched with large-torque rear power takeoff

Technical Field

The utility model relates to a gearbox, concretely relates to match gearbox of power takeoff behind big moment of torsion.

Background

With the continuous development of the engineering machinery industry, the market of users puts higher requirements on power takeoff, and a plurality of manufacturers increasingly demand high-torque rear power takeoff (1000 Nm). Due to the increase of the output torque of the rear power takeoff, a series of problems such as damage of a two-shaft rear bearing of a matched gearbox and the like are gradually highlighted after sale. The two-shaft rear bearing of the existing gearbox is generally a deep groove ball bearing, the positioning structure is shown in figure 1, a bearing inner ring 02 of the deep groove ball bearing 01 is of an integrated structure, an auxiliary box driving gear 03 is located at the rear end of the deep groove ball bearing 01, and the two-shaft rear bearing does not have a pressing requirement during normal work. When the gearbox is matched with a large-torque power takeoff (the output torque of the power takeoff reaches 1000Nm), the two-shaft rear bearing (a deep groove ball bearing) of the gearbox cannot meet the use requirement due to the strength, and faults such as roller pitting corrosion and the like can occur; the problem of bearing damage can be effectively solved by improving the deep groove ball bearing into a four-point contact ball bearing. However, because the bearing inner ring retainer is in a split type special structural form, if the bearing works normally, the inner ring of the bearing needs to be kept in a compressed state, and when the inner ring of the bearing is not compressed, the four-point contact ball bearing has faults of raceway pitting corrosion, roller pitting corrosion and the like. The inner ring of the bearing of the existing deep groove ball bearing is integrated, and the pressing and positioning are not needed by positioning through the stop ring, so that the pressing requirement of the inner ring of the four-point contact ball bearing cannot be met by adopting the existing positioning mode.

Disclosure of Invention

The utility model provides a match gearbox of power takeoff behind big moment of torsion, the purpose is solved when the big moment of torsion power takeoff is matchd to the gearbox, and two axle rear bearings of gearbox adopt current deep groove ball bearing can't satisfy big bearing capacity operation requirement, and adopt four point contact ball bearing can't satisfy the technical problem that the inner circle compressed tightly the requirement. The two-shaft rear bearing positioning structure of the gearbox can effectively solve the problem that the inner ring of the four-point contact ball bearing cannot be compressed, and avoids the faults of raceway pitting, roller pitting and the like.

In order to realize the purpose, the utility model discloses the technical scheme who adopts is:

a gearbox matched with a large-torque rear power takeoff comprises a gearbox secondary shaft, an auxiliary box driving gear 7 and a rear bearing assembly sleeved on the gearbox secondary shaft; it is characterized in that:

the rear bearing assembly comprises a bearing support 1, a bearing positioning mechanism and a four-point contact ball bearing 2 sleeved on the bearing support 1;

the four-point contact ball bearing 2 comprises a bearing inner ring front end 3 and a bearing inner ring rear end 4;

the bearing positioning mechanism comprises a bearing inner ring pressing plate 5 with a reverse L-shaped radial section and a fastener 6;

the bearing inner ring pressing plate 5 is sleeved on the secondary shaft of the gearbox and is positioned between the bearing support 1 and the auxiliary box driving gear 7;

the rear end face of the bearing support 1 is provided with a plurality of threaded holes; the bearing inner ring pressing plate 5 is provided with a plurality of mounting holes which correspond to the threaded holes one by one;

the fastening piece 6 penetrates through a mounting hole of the bearing inner ring pressing plate 5 and is connected with a threaded hole of the bearing support 1; the front end surface of the front end 3 of the bearing inner ring is attached to the side surface of the step of the bearing support 1; the rear end face of the rear end 4 of the bearing inner ring is attached to the side face of the step of the bearing inner ring pressing plate 5. And after the bearing inner ring pressing plate 5 and the bearing support 1 are tightened by the fastener, the inner ring of the four-point contact ball bearing 2 is pressed tightly.

Further, in order to facilitate the installation of the fastening piece, the front end surface of the auxiliary box driving gear 7 is provided with an installation groove; the head of the fastener 6 is located in the mounting groove, so that the fastener 6 can be prevented from interfering with the sub-tank drive gear 7.

Furthermore, the threaded holes are uniformly distributed along the same circumference by taking the central shaft of the bearing support 1 as the center, and the mounting holes on the corresponding bearing inner ring pressing plate 5 are uniformly distributed along the same circumference.

Further, the fastening member 6 is a fastening screw or a bolt.

The utility model has the advantages that:

1) the utility model discloses four-point contact ball bearing of gearbox is split type structure, can bear great bearing capacity, among the bearing positioning mechanism, four-point contact ball bearing inner circle front end and bearing support laminating, inner circle rear end and the laminating of bearing inner circle clamp plate, and fastening screw passes the bearing inner circle clamp plate and is connected with bearing support to guarantee that four-point contact ball bearing inner circle compresses tightly, this kind of location structure has effectively solved four-point contact ball bearing because of the unable rollway corrosion, the roller spot corrosion such as that lead to that compress tightly of inner circle.

2) The utility model discloses in, for the installation of fastening screw in the positioning mechanism of being convenient for, terminal surface before auxiliary box drive gear through shortening meshing spline length increase fastening screw mounting groove, guarantees that fastening screw can not take place to interfere with auxiliary box drive gear.

Drawings

FIG. 1 is a schematic view of a positioning structure of a conventional deep groove ball bearing;

fig. 2 is a schematic diagram of the positioning structure of the four-point contact ball bearing of the present invention.

Description of reference numerals:

in fig. 1, 01-deep groove ball bearing, 02-bearing inner ring, 03-auxiliary box driving gear;

in FIG. 2, 1-bearing support, 2-four-point contact ball bearing, 3-front end of bearing inner ring, 4-rear end of bearing inner ring, 5-pressure plate of bearing inner ring, 6-fastener, 7-auxiliary box driving gear.

Detailed Description

In order to more clearly illustrate the technical solution of the present invention, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

The four-point contact ball bearing is a separable structure and has larger bearing capacity. The utility model discloses to the matching problem of power takeoff behind the big moment of torsion, provided a main and auxiliary transmission structure, the rear bearing of its two axles is four point contact ball bearing, and this four point contact ball bearing's inner circle is split type structure, can bear axial and radial big moment of torsion bearing capacity. Comprises a gearbox secondary shaft, an auxiliary box driving gear 7 and a rear bearing assembly sleeved on the gearbox secondary shaft.

The key of the design scheme is the rear bearing assembly of the two shafts of the gearbox, as shown in fig. 2, the rear bearing assembly comprises a bearing support 1, a bearing positioning mechanism and a four-point contact ball bearing 2 sleeved on the bearing support 1.

The bearing positioning mechanism comprises a bearing inner ring pressing plate 5 and a fastener 6, and the radial section of the bearing inner ring pressing plate 5 is in a reverse L shape. The fastening member 6 is a fastening screw, and a bolt may be used. The bearing inner ring pressing plate 5 is sleeved on the two shafts of the gearbox and is positioned between the bearing support 1 and the auxiliary box driving gear 7.

The inner ring of the four-point contact ball bearing 2 is divided into a bearing inner ring front end 3 and a bearing inner ring rear end 4, the bearing inner ring front end 3 is attached to the step of the bearing support 1, and the bearing inner ring rear end 4 is attached to the step of the bearing inner ring pressing plate 5. The rear end face of the bearing support 1 is provided with a plurality of threaded holes, the bearing inner ring pressing plate 5 is provided with a plurality of mounting holes corresponding to the threaded holes, and fastening screws penetrate through the mounting holes of the bearing inner ring pressing plate 5 to be connected with the threaded holes of the bearing support 1, so that the inner ring of the four-point contact ball bearing 2 is guaranteed to be pressed tightly.

And simultaneously, the utility model discloses for the convenience of fastening screw's installation, set up the mounting groove at auxiliary tank drive gear 7's preceding terminal surface to in fastening screw's installation, this fastening screw mounting groove accessible shortens meshing spline length and realizes, guarantees that the fastening screw who is used for the location can not take place to interfere with auxiliary tank drive gear 7.

The above description is only for the preferred embodiment of the present invention, and not for the limitation of the technical solution of the present invention, and any known deformation made by those skilled in the art on the basis of the main technical concept of the present invention belongs to the technical scope to be protected by the present invention.

Claims (4)

1. A gearbox matched with a large-torque rear power takeoff comprises a gearbox secondary shaft, an auxiliary box driving gear (7) and a rear bearing assembly sleeved on the gearbox secondary shaft; the method is characterized in that:

the rear bearing assembly comprises a bearing support (1), a bearing positioning mechanism and a four-point contact ball bearing (2) sleeved on the bearing support (1);

the four-point contact ball bearing (2) comprises a bearing inner ring front end (3) and a bearing inner ring rear end (4);

the bearing positioning mechanism comprises a bearing inner ring pressing plate (5) with a reverse L-shaped radial section and a fastening piece (6);

the bearing inner ring pressing plate (5) is sleeved on the secondary shaft of the gearbox and is positioned between the bearing support (1) and the auxiliary box driving gear (7);

the rear end face of the bearing support (1) is provided with a plurality of threaded holes; the bearing inner ring pressing plate (5) is provided with a plurality of mounting holes which correspond to the threaded holes one by one;

the fastener (6) penetrates through a mounting hole of the bearing inner ring pressing plate (5) to be connected with a threaded hole of the bearing support (1);

the front end surface of the front end (3) of the bearing inner ring is attached to the side surface of the step of the bearing support (1); the rear end face of the rear end (4) of the bearing inner ring is attached to the side face of the step of the bearing inner ring pressing plate (5).

2. The transmission case of claim 1 for matching a high torque rear power take-off, wherein: the front end face of the auxiliary box driving gear (7) is provided with a mounting groove; the head of the fastener (6) is positioned in the mounting groove.

3. The transmission case of claim 1 or 2, which is adapted to a high torque rear power takeoff, wherein: the threaded holes are uniformly distributed along the same circumference by taking the central shaft of the bearing support (1) as the center.

4. The transmission case of claim 3 for matching a high torque rear power take-off, wherein: the fastening piece (6) is a fastening screw or a bolt.

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