CN107448485B

CN107448485B - Bearing sealing retainer ring riveting die

Info

Publication number: CN107448485B
Application number: CN201710896811.8A
Authority: CN
Inventors: 庞建林; 陈庆熙; 赵荣多; 王冰; 邱奕辉; 黄天华
Original assignee: Tcb Bearing Manufacturing Co ltd
Current assignee: Tcb Bearing Manufacturing Co ltd
Priority date: 2017-09-28
Filing date: 2017-09-28
Publication date: 2023-04-25
Anticipated expiration: 2037-09-28
Also published as: CN107448485A

Abstract

The embodiment of the invention discloses a bearing sealing retainer ring riveting die, wherein a clamping groove is formed in the outer surface of an inner ring of a bearing, the riveting die is used for riveting and fixing the sealing retainer ring on the clamping groove on the outer surface of the inner ring of the bearing, and the riveting die at least comprises: a movable mold; the die holder is positioned below the movable die and at least comprises two circumferentially symmetrically distributed check ring riveting pieces, the check ring riveting pieces are opposite to the outer peripheral surface of the sealing check ring, and each check ring riveting piece can shrink inwards in the radial direction; the support table is arranged in the die holder and positioned between the check ring riveting pieces and used for supporting the bearing; when the movable die is matched with the die holder, the riveting pieces of the check rings on the die holder can shrink inwards in the radial direction and act on the outer peripheral surface of the sealing check rings, and the sealing check rings are riveted and fixed on the clamping grooves on the outer surface of the bearing inner ring. The embodiment of the invention can improve the installation stability of the sealing retainer ring and can adapt to severe working conditions.

Description

Bearing sealing retainer ring riveting die

Technical field:

the invention relates to a die, in particular to a bearing sealing retainer ring riveting die.

The background technology is as follows:

the existing sealing bearings are mostly provided with sealing rings on two sides (or one side) or dust cover structures. For outdoor or severe working conditions, a sealing retainer ring is usually additionally arranged outside a sealing ring or a dust cover, and is fixed on an inner ring and rotates along with the inner ring, so that labyrinth seal is formed by the sealing ring or the dust cover, and the effects of blocking particulate matters from collision, protecting an inner sealing piece and throwing dust and throwing water are achieved. The existing sealing retainer ring is generally fixed on the outer diameter of the bearing inner ring in an interference fit mode, and when the bearing is impacted and vibrated under severe working conditions, the retainer ring is loosened and the bearing fails frequently.

Therefore, how to develop a die for installing the bearing sealing retainer ring to solve the problem of loosening of the bearing sealing retainer ring is a technical problem to be solved urgently.

The invention comprises the following steps:

in order to solve the problem that the existing bearing sealing retainer ring is loosened under the severe working condition, the embodiment of the invention provides a bearing sealing retainer ring riveting die.

Clamping grooves are formed in the outer surface of the inner ring of the bearing, the sealing retainer ring is riveted and fixed on the clamping grooves in the outer surface of the inner ring of the bearing, and the riveting die at least comprises:

a movable mold;

the die holder is positioned below the movable die and at least comprises two circumferentially symmetrically distributed check ring riveting pieces, the check ring riveting pieces are opposite to the outer peripheral surface of the sealing check ring, and each check ring riveting piece can shrink inwards in the radial direction;

the support table is arranged in the die holder and positioned between the check ring riveting pieces and used for supporting the bearing;

when the movable die is matched with the die holder, the riveting pieces of the check rings on the die holder can shrink inwards in the radial direction and act on the outer peripheral surface of the sealing check rings, and the sealing check rings are riveted and fixed on the clamping grooves on the outer surface of the bearing inner ring.

According to the embodiment of the invention, through the matching of the movable die and the die holder, each check ring riveting piece on the die holder can shrink inwards in the radial direction and act on the outer peripheral surface of the check ring, so that the check ring is riveted and fixed on the outer surface of the inner ring of the bearing. Thereby improving the installation stability of the sealing retainer ring and being applicable to severe working conditions.

Description of the drawings:

in order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic cross-sectional view of a bearing seal retainer ring riveting die according to an embodiment of the invention;

FIG. 2 is a schematic diagram of a die holder according to an embodiment of the present invention;

FIG. 3 is an enlarged schematic view of the portion A of FIG. 1 after the movable mold is hidden;

FIG. 4 is an enlarged partial schematic view of the bearing of FIG. 1;

fig. 5 is an enlarged view of a portion of the sealing ring of fig. 4 riveted to the clamping groove.

The specific embodiment is as follows:

in order to make the technical problems, technical schemes and beneficial effects solved by the invention more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

When embodiments of the present invention refer to the ordinal terms "first," "second," etc., it is to be understood that they are merely used for distinguishing between them unless the order of their presentation is indeed dependent on the context.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1 to 5, an embodiment of the present invention provides a bearing sealing ring riveting die, an outer surface of an inner ring 42 of a bearing is provided with a clamping groove 421, the riveting die is used for riveting and fixing a sealing ring 44 on the clamping groove 421 on the outer surface of the inner ring 42 of the bearing, and the riveting die at least includes:

a movable die 1;

the die holder 2 is positioned below the movable die 1 and at least comprises two circumferentially symmetrically distributed check ring riveting pieces, the check ring riveting pieces are opposite to the outer peripheral surface of the sealing check ring 44, and each check ring riveting piece can shrink inwards in a radial direction;

the supporting table 31 is arranged in the die holder 2 and positioned between the check ring riveting pieces and is used for supporting the bearing;

when the movable die 1 is matched with the die holder 2, each retainer riveting piece on the die holder 2 can shrink radially inwards and act on the outer peripheral surface of the sealing retainer ring 44, so that the sealing retainer ring 44 is riveted and fixed on the clamping groove 421 on the outer surface of the bearing inner ring 42.

Further, in the present embodiment, the movable die 1, the retainer rivet, and the support table 31 are coaxially disposed. The structure is simple, and the retainer ring can be conveniently and accurately riveted and fixed on the outer surface of the inner ring of the bearing.

Still further, as a specific embodiment and not by way of limitation, as shown in fig. 2 and 3, the outside of the retainer rivet is provided with a radially outwardly extending constriction 21 and the inside of the retainer rivet is provided with a radially inwardly extending rivet protrusion 22. The structure is simple, when the movable mould is matched with the mould base, the riveting piece of each check ring on the mould base can conveniently shrink inwards in the radial direction, and the check rings are accurately riveted and fixed on the outer surface of the inner ring of the bearing.

Further, as a preferred embodiment, the constriction guide 21 is a tapered guide which gradually increases from top to bottom. Simple structure and convenient riveting control.

Still further, as a preferred embodiment and not by way of limitation, the crimping projections 22 taper radially from the outside to the inside. The structure is simple, and the retainer ring can be accurately riveted and fixed on the outer surface of the inner ring of the bearing.

Illustratively, in the present embodiment, the upper surface of the rivet projection 22 is a flat surface, and the lower surface is a tapered surface that gradually increases from top to bottom. The structure is simple.

Further, in the present embodiment, the radially inner end portion of the caulking projections 22 is slightly higher than the support table 31. The structure is simple.

Further, as a specific embodiment, but not limited to, the retainer rivet is concavely provided with a receiving cavity 23, and the receiving cavity 23 is located above the rivet protrusion 22, and is formed by the inner side surface of the retainer rivet and the upper surface of the rivet protrusion 22. The structure is simple, and the accommodating cavities on the check ring riveting pieces jointly form an assembling cavity matched with the bearing.

Still further, as a preferred embodiment, as shown in fig. 2, 6 retainer rivets are provided on the die holder 2, and the retainer rivets are uniformly distributed at intervals in the circumferential direction. The structure is simple, and the retainer ring can be firmly arranged on the peripheral surface of the inner ring.

Further, as a specific embodiment, but not limited to, as shown in fig. 1, a mandrel 3 extending longitudinally upwards is disposed at the center of the die holder 2, the movable die 1 and the supporting table 31 are sleeved outside the mandrel 3, the movable die 1 can slide along the mandrel 3 from top to bottom to cooperate with the die holder 2, the retainer riveting pieces are distributed around the mandrel 3, and the bearing can be concentrically sleeved outside the mandrel 3.

Further, as a preferable scheme, as shown in fig. 1, the supporting table 31 is arranged between the riveting protrusion 22 and the mandrel 3, the axial height of the supporting table 31 is adjustable, when the bearing is concentrically sleeved on the mandrel 3, the lower end face of the inner ring 42 abuts against the supporting table 31, and the axial relative position of the sealing retainer ring 44 and the inner ring 42 of the bearing can be changed by adjusting the axial height of the supporting table 31.

Further, in this embodiment, as shown in fig. 1, the movable die 1 is provided with a pressing portion with a downward opening, and when the movable die 1 is mated with the die holder 2 from top to bottom, each retainer rivet on the die holder 2 is contracted radially inward by the pressing portion and acts on the outer peripheral surface of the sealing retainer 44. The structure is simple.

Specifically, in the present embodiment, the extrusion portion of the movable mold 1 is a tapered cavity that gradually increases from top to bottom. The structure is simple.

More specifically, as a preferred embodiment of the present example, as shown in fig. 4, the bearing includes at least an outer ring, an inner ring 42, rolling bodies provided between the inner ring 42 and the outer ring, and a seal ring 44; the axial length of the inner ring 42 is larger than that of the outer ring, the upper end face of the inner ring is aligned with the outer ring, the lower end face of the inner ring is downwards protruded from the outer ring, and the sealing retainer ring 44 is positioned between the lower end faces of the inner ring 42 and the outer ring and sleeved outside the inner ring 42; a clamping groove 421 is formed on the outer surface of the inner ring 42 corresponding to the outer peripheral surface of the sealing retainer ring 44.

The working principle of the invention is as follows: when the movable die 1 is matched with the die holder 2, each retainer riveting piece on the die holder 2 can shrink radially inwards and act on the outer peripheral surface of the sealing retainer ring 44, so that a radially inwards extending clamping block is generated on the outer peripheral surface of the sealing retainer ring 44, and the sealing retainer ring 44 is riveted and fixed on the clamping groove 421 on the outer surface of the bearing inner ring 42 through the matching of the clamping block and the clamping groove 421.

The foregoing description of one or more embodiments provided in connection with the specific disclosure is not intended to limit the practice of the invention to such description. The method, structure, etc. similar to or identical to those of the present invention, or some technical deductions or substitutions are made on the premise of the inventive concept, should be regarded as the protection scope of the present invention.

Claims

1. The clamping groove is formed in the outer surface of the inner ring of the bearing, and the riveting die is used for riveting and fixing the sealing retainer ring on the clamping groove of the outer surface of the inner ring of the bearing, and is characterized in that the riveting die at least comprises:

a movable mold;

2. The bearing seal retainer rivet die of claim 1, wherein the movable die, the retainer rivet, and the support stand are coaxially disposed.

3. A bearing seal retainer riveting die as claimed in claim 1 or claim 2 wherein the outer side of the retainer rivet is provided with a radially outwardly extending constriction guide and the inner side of the retainer rivet is provided with a radially inwardly extending riveting projection.

4. A bearing seal retainer rivet die as set forth in claim 3 wherein the converging guide is a tapered guide that tapers from top to bottom.

5. A bearing seal retainer rivet die as set forth in claim 3 wherein the rivet projections taper radially from outside to inside.

6. A bearing seal retainer riveting die as claimed in claim 3 wherein the upper surface of the riveting projection is planar and the lower surface is tapered from top to bottom.

7. A bearing seal retainer rivet die as set forth in claim 3 wherein the radially inner end of the rivet projection is higher than the support table.

8. A bearing seal retainer riveting die as claimed in claim 3, wherein the retainer riveting piece is concavely provided with a containing cavity which is positioned above the riveting bulge and is formed by the inner side surface of the retainer riveting piece and the upper surface of the riveting bulge.

9. The bearing sealing retainer riveting die according to claim 3, wherein a mandrel extending longitudinally upwards is arranged at the center of the die holder, the movable die is sleeved outside the mandrel and can slide along the mandrel from top to bottom to be matched with the die holder, retainer riveting parts are distributed around the mandrel, and the bearing can be concentrically sleeved on the mandrel.

10. The bearing sealing retainer ring riveting die as claimed in claim 9, wherein the supporting table is arranged between the riveting bulge and the mandrel, the axial height of the supporting table is adjustable, when the bearing is concentrically sleeved on the mandrel, the lower end face of the inner ring of the bearing is propped against the supporting table, and the axial relative position of the sealing retainer ring and the inner ring of the bearing can be changed by adjusting the axial height of the supporting table.