KR20160088564A

KR20160088564A - Nut ring and nut ring assembly with the same

Info

Publication number: KR20160088564A
Application number: KR1020150007779A
Authority: KR
Inventors: 전명훤
Original assignee: 현대중공업 주식회사
Priority date: 2015-01-16
Filing date: 2015-01-16
Publication date: 2016-07-26

Abstract

According to an embodiment of the present invention, a nut ring has a bolt hole allowing a bearing to be in close contact therewith. The nut ring further has a close contact support groove formed across the bolt hole to be vertical to the longitudinal direction of the bolt hole and passing through one surface of equipment, which has a screw thread to meet the nut ring. The nut ring comprises a first member and a second member. The first member is included in one side with respect to the close contact support groove and has a screw thread formed on the inner circumferential surface thereof to correspond to the screw thread of the equipment. The second member is included in the other side with respect to the close contact support groove and has a screw thread formed on the inner circumferential surface thereof to correspond to the screw thread of the equipment. According to the present invention, the nut ring and the nut ring assembly including the same allow the nut ring to solely be used without a lock plate in a preload structure of a main bearing of a drive decelerator to reduce use of space such that the weight of the drive decelerator can be reduced as much as the reduced space, manpower for designing and assembling the lock plate is reduced, costs for manufacturing a mold can be reduced, and designing of the preload structure of the main bearing can be simplified.

Description

A nut ring and a nut ring assembly including the nut ring,

The present invention relates to a nut ring and a nut ring assembly comprising the same.

A preload is applied to the rolling reducer for the excavator in order to increase the life of the ball bearing (taper roller bearing) and the roller bearing (angular ball bearing). The preload of the bearing means that a certain amount of axial load is continuously applied.

There are two types of reduction gears for excavators: a method of applying a preload with a tightening torque using a nut ring, and a method of applying a preload with a preload (mm) by inserting a shim.

Particularly, a conventional nut ring is fastened to the threaded portion of the motor, a preload is applied to the bearing with a tightening torque, the lock plate is assembled into a two-row carrier spline, With bolts.

In other words, a lock plate is essentially provided in a nut ring for applying a preload to a drive decelerator main bearing for an excavator through a torque. Such a structure is complicated in that the design shape is complicated and the positions of the fastening bolts are matched when assembled. This will be described with reference to the drawings.

1 is a view showing a motor in which a general nut ring and a lock plate are installed.

1, a housing 20 is fastened to a motor 10 and a bearing 30 (not shown) is interposed between the motor 10 and the housing 20 so that the housing 20 can smoothly rotate through the shaft of the motor 10. [ ) Is installed.

At this time, bolts 60 are fastened to the lock plate 40 and the nut ring 50 in order to increase the preload of the bearing 30. In order to align the fastening bolt holes (not shown) of the nut ring 50, The fastening bolt holes (not shown) of the plate 40 are formed of slot holes or formed of a plurality of slots.

That is, the nut ring 50 and the lock plate 40 are fastened with the bolts 60. Due to the design and assembly errors of the nut ring 50 and the lock plate 40, the positions of the fastening bolt holes An extra bolt hole is designed in addition to the bolt hole in which the bolt 60 is actually assembled to fasten the bolt 60 by adjusting the positions of the bolt holes positioned above and below, And the lock plate 40 is required to be designed and assembled, so that assembly is troublesome and labor is wasted, and manufacturing cost increases.

It is an object of the present invention to provide a nut ring and a nut ring assembly including the same that can simplify the structure of a nut ring assembly and reduce assembly and manufacturing costs.

A nut ring according to an embodiment of the present invention includes a bolt hole formed in a nut ring for tightly fitting a bearing, the bolt hole being perpendicular to the bolt hole in a longitudinal direction thereof, A first member which is formed at one side with respect to the close contact support groove and in which a thread is formed on an inner circumferential surface corresponding to a thread of the equipment; And a second member provided on the other side with respect to the close contact support groove, wherein a thread is formed on the inner circumferential surface corresponding to the thread of the equipment.

According to another aspect of the present invention, there is provided a nut ring assembly including: a nut ring having a bolt hole formed therein to closely contact a bearing; And a bolt portion coupled to the bolt hole, wherein the nut ring is further formed with a fastening support groove passing perpendicularly to the longitudinal direction of the bolt hole and passing through one side of the equipment, And is brought into close contact with the space of the close contact support groove according to the screwing of the bolt portion so as to be closely contacted.

Specifically, a thread is formed on one surface of the apparatus, the nut ring is provided on one side with respect to the close contact support groove, and a thread is formed on an inner circumferential surface corresponding to the thread of the apparatus; And a second member provided on the other side with respect to the close contact support groove, wherein a thread is formed on the inner circumferential surface corresponding to the thread of the equipment.

The nut ring according to the present invention and the nut ring assembly including the same can reduce the weight of the traveling speed reducer by using only the nut ring without the lock plate in the pre-pressurizing structure of the driving decelerator main bearing. And manpower for assembly can be reduced, mold production cost can be reduced, and the design of the main bearing preload structure can be simplified.

1 is a view showing a motor in which a general nut ring and a lock plate are installed.
FIG. 2 illustrates a motor in which a nut ring assembly according to an embodiment of the present invention is installed.
FIG. 3 is an enlarged view of FIG. 2 A. FIG.
4 is a view illustrating a nut ring according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The objects, particular advantages and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. It should be noted that, in the present specification, the reference numerals are added to the constituent elements of the drawings, and the same constituent elements have the same numerical numbers as much as possible even if they are displayed on different drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 to 4 are views for explaining a nut ring assembly according to an embodiment of the present invention.

2 through 4, the nut ring assembly 100 according to an embodiment of the present invention includes a nut ring 110 and a bolt portion 120. The bolt portion 120 is formed of a conventional bolt And is coupled to the bolt hole 110A. The nut ring assembly 100 is installed in an equipment such as a motor 10 and a housing 20 is fastened to the motor 10 so that the housing 20 smoothly rotates through the shaft of the motor 10. [ A bearing 30 is provided between the motor 10 and the housing 20 and a nut ring assembly 100 for closely contacting the bearing 30 to increase the preload of the bearing 30 is provided.

Specifically, the nut ring 110 is formed with a bolt hole 110A, and the bearing 30 is closely contacted.

The nut ring 110 is formed with a tight contact support groove 111 passing perpendicularly to the longitudinal direction of the bolt hole 110A and passing through the one surface 10A of the motor 10 so that the inner circumferential surface of the nut ring 110 Is tightly fitted into the space of the close contact support groove (111) according to the screwing of the bolt part (120) so as to be in close contact with the one surface (10A) of the motor (10).

Specifically, a thread is formed on one surface 10A of the motor 10, and the nut ring 110 includes a first member 111A and a second member 111B. The first member 111A and the second member 111B are partitioned on both sides with the tight contact support groove 111 therebetween so that the space is compressed by the bolt portion 120 into the space of the close contact support groove 111 So as to be brought into close contact with each other.

In other words, the first member 111A is formed at one side of the nut ring 110 with respect to the close contact support groove 111, and an inlet through which the bolt 120 is inserted is formed, And the other end of the nut ring 110 is positioned with respect to the groove 111 so that the end portion of the bolt portion 120 is positioned.

A thread is formed in the inner peripheral surface of each of the first and second members 111A and 111B corresponding to the thread of the motor 10 and the bolt 120 is fastened The first member 111A is pushed by the close contact support groove 111 and the second member 111B is pushed by the close contact support groove 111 so that the first member 111A and the second member 111B come close to each other, The inner circumferential surfaces of the first member 111A and the second member 111B are brought into close contact with the screw surfaces formed on the one surface 10A of the motor 10. [

As described above, the nut ring 110 according to the present embodiment not only increases the preload by bringing the bearings 30 into close contact with each other, but also forms the close contact support grooves 111 such that grooves are formed across the bolt holes 110A, When the bolt portion 120 is screwed and tightened, the inner circumferential surface of the nut ring 110 is brought into close contact with the thread of the motor 10 while the space of the close contact support groove 111 is narrowed, so that the nut ring 110 is not loosened . Further, the reaction force of the tightening torque also catches the thread of the motor 10, so that the force for preventing the loosening becomes larger.

As described above, according to the present embodiment, since the nut ring 110 alone is used without a lock plate in the driving decelerator main bearing preload structure, the space occupied by the lock plate is reduced, thereby reducing the weight of the traveling speed reducer. Reduced manpower for design and assembly, reduced mold production costs, and simplified design of the main bearing preload structure.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the same is by way of illustration and example only and is not to be construed as limiting the present invention. It is obvious that the modification and the modification are possible.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

10: Motor 10A: One side of the motor
20: housing 30: bearing
40: Lock plate 50: (Conventional) Nut ring
60: Bolt 100: Nut ring assembly
110: nut ring 110A: bolt hole
111: tight contact support groove 111A: first member
111B: second member 120: bolt part

Claims

A nut ring in which a bolt hole is formed and a bearing is closely contacted,
A bolt hole passing through the bolt hole perpendicularly to the longitudinal direction of the bolt hole and threaded through the bolt hole so as to be in contact with the nut ring,
A first member provided at one side with respect to the close contact support groove and having a thread on an inner circumferential surface corresponding to a thread of the equipment; And
And a second member provided on the other side with respect to the close contact support groove and having a thread on the inner circumferential surface corresponding to the thread of the equipment.

A nut ring in which a bolt hole is formed and the bearing is closely contacted; And
And a bolt portion coupled to the bolt hole,
The nut ring is further provided with a contact support groove passing perpendicularly to the longitudinal direction of the bolt hole and passing through the one surface of the equipment so that the inner circumferential surface of the nut ring is closely contacted with the equipment, Wherein the nut ring assembly is in close contact with the space of the support groove.

3. The method of claim 2,
A thread is formed on one side of the equipment,
In the nut ring,
A first member provided at one side with respect to the close contact support groove and having a thread on an inner circumferential surface corresponding to a thread of the equipment; And
And a second member provided on the other side with respect to the close contact support groove and having a thread on the inner circumferential surface corresponding to the thread of the equipment.