CN217152679U

CN217152679U - Long-life non-contact labyrinth seal tensioning wheel bearing

Info

Publication number: CN217152679U
Application number: CN202221110679.6U
Authority: CN
Inventors: 沈军民; 洪玲芳; 来永祥
Original assignee: Hangzhou Senwei Automobile Bearing Co ltd
Current assignee: Hangzhou Senwei Automobile Bearing Co ltd
Priority date: 2022-05-10
Filing date: 2022-05-10
Publication date: 2022-08-09
Anticipated expiration: 2032-05-10

Abstract

The utility model discloses a tight pulley bearing that rises of long-life non-contact labyrinth seal, including the outer lane, the inside of outer lane is provided with the inner circle, and the outside surface of inner circle is provided with the holder, and the both sides fixed surface of inner circle installs the metal shield, and the outside surface of metal shield is close to one end edge fixed mounting and has outer retaining ring, and the inboard surface of outer lane is located both sides edge embedding and installs interior retaining ring. Long-life non-contact labyrinth seals's tight pulley bearing that rises, through the non-contact labyrinth seal structure who sets up, constitute the seal chamber by outer retaining ring and interior retaining ring, can effectively prevent the loss of the inside emollient of bearing, accept the in-process at the bearing simultaneously, can also effectively prevent dust or impurity to carry out inside the bearing, and install overall structure simple, compact.

Description

Long-life non-contact labyrinth seal tensioning wheel bearing

Technical Field

The utility model relates to a bearing arrangement technical field, in particular to long-life non-contact labyrinth seals's tight pulley bearing that rises.

Background

The tension wheel is a belt tensioning device for an automobile transmission system, the tensioner is divided into an accessory tension wheel (a generator belt tension wheel, an air conditioner belt tension wheel, a mechanical supercharger belt tension wheel and the like) and a timing belt tension wheel according to a generation part, the tension wheel is mainly divided into a mechanical automatic tension wheel and a hydraulic automatic tension wheel according to a tension mode, the tension wheel mainly comprises a fixed shell, a tension arm, a wheel body, a torsion spring, a rolling bearing, a spring shaft sleeve and the like, the tension force can be automatically adjusted according to different tightness degrees of a belt, so that the transmission system is stable, safe and reliable, the tension wheel is a vulnerable part of parts of an automobile and the like, the belt is easy to wear after a long time, the belt groove is elongated after being deeply ground and narrow, the tension wheel can be automatically adjusted according to the wear degree of the belt through a hydraulic unit or a damping spring, and the belt of the tension wheel is more stable in running, the noise is low, and the slipping can be prevented; the existing tension pulley bearing has certain defects when in use, the sealing performance of the existing structure is poor, the structural connection is not compact enough, lubricating grease is easy to run off after the bearing is used for a long time, and meanwhile, external impurities easily enter the inside of the bearing to influence the normal use of the bearing.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at provides long-life non-contact labyrinth seals's tight pulley bearing that rises, can effectively solve the problem in the background art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the long-life non-contact labyrinth seal tension pulley bearing comprises an outer ring, wherein an inner ring is arranged in the outer ring, a retainer is arranged on the outer side surface of the inner ring, metal dust covers are fixedly arranged on the surfaces of two sides of the inner ring, an outer check ring is fixedly arranged on the outer side surface of each metal dust cover close to one edge, and an inner check ring is embedded and arranged on the inner side surface of the outer ring at the edges of the two sides;

the outer side surface of the inner check ring is fixedly provided with a boss at one end edge, a groove is formed in the middle of one side surface of the inner check ring, the cross section of the groove is U-shaped, a butt joint groove is formed in the middle of the other side surface of the outer check ring, and the cross section of the butt joint groove is U-shaped.

Preferably, the inner side surface of the outer ring is provided with an outer rolling groove at the middle part, the inner side surface of the outer ring is symmetrically provided with caulking grooves near the edges at two sides, and the lug boss is connected with the caulking grooves in an embedded mode.

Preferably, the inner rolling groove is formed in the middle of the outer side surface of the inner ring, and the through groove is formed in the inner side surface of the inner ring.

Preferably, the retainer is formed by combining two groups of sub-frames, the sub-frames are fixedly connected through bolts, ball sleeves are symmetrically and fixedly mounted on the surfaces of the sub-frames, and connecting balls are connected to the inner side surfaces of the ball sleeves in a rolling mode.

Preferably, the metal dust cover is made of high-carbon chromium bearing.

Preferably, an inner side surface of the outer ring is coated with grease.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model discloses in, through the non-contact labyrinth seal structure who sets up, constitute the seal chamber by outer retaining ring and interior retaining ring, can effectively prevent the loss of the inside emollient of bearing, accept the in-process at the bearing simultaneously, can also effectively prevent dust or impurity to carry out inside the bearing, and install that overall structure is simple, compact.

Drawings

Fig. 1 is a schematic view of the overall structure of the long-life non-contact labyrinth seal tension pulley bearing of the present invention;

fig. 2 is a schematic view of a split structure of an outer ring, an inner ring and a retainer of the long-life non-contact labyrinth seal tension wheel bearing of the present invention;

fig. 3 is the utility model discloses long-life non-contact labyrinth seals's tight pulley bearing's that rises metal shield, outer retaining ring section and interior retaining ring split structure sketch map.

In the figure: 1. an outer ring; 2. an inner ring; 3. a holder; 4. a metal dust cap; 5. an outer retainer ring; 6. an inner retainer ring; 601. a boss; 602. and (4) a groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1-3, the long-life non-contact labyrinth seal tension pulley bearing comprises an outer ring 1, an inner ring 2 is arranged inside the outer ring 1, a retainer 3 is arranged on the outer side surface of the inner ring 2, metal dust covers 4 are fixedly arranged on the surfaces of two sides of the inner ring 2, an outer retainer ring 5 is fixedly arranged on the outer side surface of each metal dust cover 4 close to one edge, and inner retainer rings 6 are embedded and arranged on the inner side surface of the outer ring 1 at the edges of the two sides;

the outer side surface of the inner retainer ring 6 is fixedly provided with a boss 601 at one end edge, one side surface of the inner retainer ring 6 is provided with a groove 602 in the middle, the cross section of the groove 602 is U-shaped, the other side surface of the outer retainer ring 5 is provided with a butt joint groove in the middle, the cross section of the butt joint groove is U-shaped, the grooves 602 and the butt joint grooves which are U-shaped structures are overlapped together to form a connection mode that the inner retainer ring 6 is overlapped on the outer retainer ring 5, and a labyrinth structure is formed between the grooves, so that dust and impurities can be prevented from entering in the bearing operation process, and meanwhile, the loss of lubricating grease can be avoided, so that lubricating substances do not need to be added subsequently;

the inner side surface of the outer ring 1 is provided with an outer rolling groove at the middle part, the inner side surface of the outer ring 1 is symmetrically provided with caulking grooves near the edges of two sides, the lug boss 601 is connected with the caulking grooves in an embedded mode, the outer rolling groove can be coated with connecting balls from the outer end, and the connection mode of the caulking grooves and the lug boss 601 can enable the inner retainer ring 6 to provide stress support for the outer retainer ring 5 in the connection process;

an inner rolling groove is formed in the middle of the outer side surface of the inner ring 2, a through groove is formed in the inner side surface of the inner ring 2, the inner rolling groove can abut against the connecting ball from the inner end, and therefore a groove body for the connecting ball to roll is formed by matching with the outer rolling groove;

the retainer 3 is formed by combining two groups of sub-frames, the sub-frames are fixedly connected through bolts, ball sleeves are symmetrically and fixedly arranged on the surfaces of the sub-frames, connecting balls are connected on the inner side surfaces of the ball sleeves in a rolling mode, the ball sleeves on the surfaces of the symmetrically connected sub-frames can keep stable intervals while the balls do not interfere the free rotation of the balls;

the metal dust cover 4 is made of high-carbon chromium bearing steel, and the high-carbon chromium bearing steel can meet the strength use requirement of the metal dust cover 4;

the inner side surface of the outer ring 1 is coated with lubricating grease which can be coated on the surface of the ball in the moving process, so that the lubricating requirement is met.

The working principle is as follows: in the structure of the device, the groove 602 and the butt joint groove which are mutually in a U-shaped structure are overlapped together to form a connection mode that the inner retainer ring 6 is overlapped on the outer retainer ring 5, a labyrinth structure is formed between the groove and the groove, the dust and impurities can be prevented from entering in the bearing running process, and simultaneously the loss of lubricating grease can be avoided, so that the lubricating substance is not required to be added subsequently, the outer rolling groove can cover and connect the ball from the outer end, the connection mode of the caulking groove and the boss 601 can ensure that the inner retainer ring 6 can provide stress support for the inner retainer ring in the connection process with the outer retainer ring 5, the inner rolling groove can abut against the connecting ball from the inner end, so that the outer rolling groove is matched to form a groove body for connecting the ball to roll, the lubricating grease can be coated on the surface of the ball in the ball moving process in the using process, so that the lubricating requirement is met, therefore, a sealing chamber consisting of the outer retainer ring and the inner retainer ring can effectively prevent the loss of the lubricating agent in the bearing, meanwhile, in the bearing accommodating process, dust or impurities can be effectively prevented from entering the bearing, and the device is simple and compact in overall structure.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. Long-life non-contact labyrinth seals's tight pulley bearing that rises, including outer lane (1), its characterized in that: an inner ring (2) is arranged in the outer ring (1), a retainer (3) is arranged on the outer side surface of the inner ring (2), metal dust covers (4) are fixedly arranged on the surfaces of two sides of the inner ring (2), an outer retainer ring (5) is fixedly arranged on the outer side surface of each metal dust cover (4) close to one edge, and inner retainer rings (6) are embedded and arranged on the edges of two sides of the inner side surface of the outer ring (1);

the outer side surface of the inner check ring (6) is fixedly provided with a boss (601) at one end edge, one side surface of the inner check ring (6) is provided with a groove (602) at the middle part, the cross section of the groove (602) is U-shaped, the other side surface of the outer check ring (5) is provided with a butt joint groove at the middle part, and the cross section of the butt joint groove is U-shaped.

2. The long life non-contact labyrinth seal tensioner bearing of claim 1, further comprising: the inner side surface of the outer ring (1) is positioned at the middle part and is provided with an outer rolling groove, the inner side surface of the outer ring (1) is symmetrically provided with caulking grooves close to the edges of two sides, and the lug boss (601) is connected with the caulking grooves in an embedded mode.

3. The long life non-contact labyrinth seal tensioner bearing of claim 1, further comprising: the outer side surface of the inner ring (2) is provided with an inner rolling groove at the middle part, and the inner side surface of the inner ring (2) is provided with a through groove.

4. The long life non-contact labyrinth seal tensioner bearing of claim 1, further comprising: the retainer (3) is formed by combining two groups of sub-frames, the sub-frames are fixedly connected through bolts, ball sleeves are symmetrically and fixedly mounted on the surfaces of the sub-frames, and connecting balls are connected to the inner side surfaces of the ball sleeves in a rolling mode.

5. The long life non-contact labyrinth seal tensioner bearing of claim 1, further comprising: the metal dust cover (4) is made of high-carbon chromium bearing steel.

6. The long life non-contact labyrinth seal tensioner bearing of claim 1, further comprising: the inner side surface of the outer ring (1) is coated with grease.