CN214274237U

CN214274237U - Ball bearing with dust cover

Info

Publication number: CN214274237U
Application number: CN202022805234.7U
Authority: CN
Inventors: 徐峰; 周月刚
Original assignee: Ningbo Zhenhai Jianye Bearing Co ltd
Current assignee: Ningbo Zhenhai Jianye Bearing Co ltd
Priority date: 2020-11-26
Filing date: 2020-11-26
Publication date: 2021-09-24
Anticipated expiration: 2030-11-26

Abstract

The utility model relates to a field that rotatory support was equipped especially relates to a take ball bearing of shield, and it includes bearing inner race, sets up ball between bearing inner race and bearing inner race, supplies the holder that the ball was placed, and bearing inner race joint has and is annular shield, is provided with the dust lip on the periphery wall of shield, and the one end butt that the dust cap was kept away from to the dust lip is in the bearing inner race. This application has the area of contact who reduces between shield and the bearing inner race, makes and is difficult for generating heat between shield and the bearing inner race, reduces the overheated condition of bearing, makes the more reliable and more stable effect of operating condition of bearing.

Description

Ball bearing with dust cover

Technical Field

The application relates to the field of rotary supporting equipment, in particular to a ball bearing with a dustproof cover.

Background

The bearing is widely applied to the field of machinery, and has the functions of supporting a rotating shaft and parts on the shaft and keeping the normal working position and the rotation precision of the shaft. In the relative rotation process of the inner ring and the outer ring of the bearing, dust can enter the bearing, abrasion among the ball, the inner ring and the outer ring in the bearing is accelerated, the bearing is not smooth to operate, and the dust can be combined with lubricating oil and adhered in the bearing to block the rotation of the bearing.

The dust cover has the functions of protecting the bearing from being corroded and polluted by foreign matters and ensuring the normal operation of the bearing. Chinese utility model patent publication No. CN111486177A "shield and bearing" discloses a shield, the shield is used for the bearing and is constructed as cyclic annular component, the shield includes the shield body and is connected to the deformation portion on the shield body, the shield body is located the radial inboard department of shield, and, the deformation portion is located the radial outer fringe department of shield, the deformation portion extends from the shield body in the radial outside of shield and the direction of the first axial direction of deviant shield, thereby the deformation portion can take place to warp when receiving the ascending power of second axial direction and make the radial dimension of shield increase, wherein, first axial direction and second axial direction are opposite.

In view of the above-mentioned related art, the inventors believe that there are defects that the dust cap deformation portion abuts against the surface of the bearing outer ring, the friction area is large, heat is easily generated between the dust cap and the bearing outer ring when the bearing rotates, the inside of the bearing is overheated, and the bearing is welded and burned out.

SUMMERY OF THE UTILITY MODEL

In order to reduce area of contact between shield and the bearing inner race, make between shield and the bearing inner race be difficult for generating heat, the operating condition of bearing is more reliable and more stable, and this application provides a ball bearing with shield.

The application provides a take ball bearing of shield adopts following technical scheme:

the utility model provides a take ball bearing of shield, ball bearing includes bearing inner race, set up in the bearing inner race with ball between the bearing inner race, the holder that supplies the ball to place, the bearing inner race is installed and is annular shield, the shield orientation the protruding pointed end butt that is equipped with of one end of bearing inner race inner wall in the first dust guard of bearing inner race inner wall.

Through adopting above-mentioned technical scheme, the shield sets up between bearing inner race and inner circle, effectively blocks in the dust gets into ball bearing, reduces each part that dust, sand etc. hinder ball bearing rotation and even damage ball bearing. When the bearing inner ring rotates, the bearing outer ring is relatively static, the dustproof cover is clamped on the bearing inner ring and rotates along with the bearing inner ring, the tip of the first dustproof sheet protruding out of the dustproof cover outer wall abuts against the bearing outer ring, the contact area of the first dustproof sheet and the bearing outer ring is small, the friction area is small during relative rotation, and therefore the generated heat is small, and the condition that the bearing is overheated is reduced.

Optionally, a second annular groove is formed in the inner wall of the bearing outer ring, and the tip of the first dustproof sheet abuts against the inner wall of the second annular groove.

By adopting the technical scheme, when the bearing inner ring rotates, the tip of the first dustproof sheet abuts against the inner wall of the second annular groove, and the situation that the inner wall of the bearing outer ring of the first dustproof sheet is offset and then rubbed with the ball to influence the rotation performance of the bearing is reduced.

Optionally, one end of the dust cover facing the inner wall of the bearing outer ring is convexly provided with a second dust-proof sheet of which the tip abuts against the inner wall of the second annular groove.

By adopting the technical scheme, when the bearing inner ring rotates, the tip of the second dustproof sheet abuts against the inner wall of the second annular groove, and the second dustproof sheet and the second annular groove rotate relatively. The two dustproof sheets can effectively reduce the condition that dust enters the inside of the bearing or lubricating oil leaks out of the inside of the bearing. On the other hand, the second dustproof sheet enables the dustproof cover to be more stable, and the situation of the dustproof cover offset in the rotating process is reduced.

Optionally, the cross section of the tip of the first dustproof sheet and the tip of the second dustproof sheet are in a semicircular arc shape.

Through adopting above-mentioned technical scheme, when dustproof piece point butt was on the inner wall of second ring channel, the most advanced terminal surface of semicircle arc shape respectively with the inner wall looks butt of second ring channel interior angle both sides, be favorable to the stress release of second ring channel interior angle, the most advanced butt that reduces dustproof piece produces great effort when the interior angle of second ring channel, causes the condition of damage to the inner wall of bearing inner race.

Optionally, a plurality of reinforcing ribs are circumferentially and uniformly distributed between the first dustproof sheet and the second dustproof sheet.

Through adopting above-mentioned technical scheme, when the shield was installed on the bearing, there was the contained angle between first dust guard and the second dust guard, formed cavity, the dust guard probably atress takes place to warp, reduces dustproof ability. Evenly set up a plurality of strengthening ribs in circumference between first dustproof piece and second dustproof piece, make and form firm the connection between the dustproof piece, strengthen its resistance to deformation ability.

Optionally, the inner ring of the dust cover is convexly provided with a stop block, and the bearing inner ring is circumferentially provided with a plurality of mounting grooves for clamping the stop block.

Through adopting above-mentioned technical scheme, during the installation shield, the dog joint in the mounting groove and with the diapire looks butt of mounting groove, make the shield cover establish circle in the bearing, make things convenient for operating personnel to install and dismantle.

Optionally, the bearing inner race comprises a plurality of plungers inserted into the mounting groove, and the plungers are inserted into the mounting groove in an interference manner and then abut against the end surface of the stop block.

Through adopting above-mentioned technical scheme, establish the back on the bearing with the shield cover when operating personnel, the dog is pegged graft in the mounting groove, inserts mounting groove and interference fit with the plunger again, terminal surface butt in the dog up end under the plunger, reduces the bearing and rotates the in-process, and the dog slides in the mounting groove and makes the shield take place vibrations, influences bearing operation performance, and the dog slides out of the condition that the mounting groove made the shield drop even.

Optionally, the mounting groove is "L" form, the mounting groove is including supplying the straight flute of dog joint, straight flute one end is located the terminal surface of bearing inner race, and the other end intercommunication has the cross slot, the cross slot supplies the dog joint, plunger interference peg graft in the straight flute back butt in the side end face of dog.

Through adopting above-mentioned technical scheme, when operating personnel cover established the shield, insert the dog in the straight flute, make the dog remove and slide to the straight flute bottom along the straight flute. When the lower end face of the stop block abuts against the bottom wall of the straight groove, the dustproof cover is rotated to enable the stop block to be clamped in the transverse groove, the end face of the stop block abuts against the bottom wall, far away from the straight groove, of the transverse groove, and then the plunger is inserted into the straight groove to enable the side end face of the plunger to abut against the side end face of the stop block. The plunger carries on spacingly to the dog, fixes the dog in the cross slot, because plunger and straight flute interference fit, reduces the condition of plunger slippage from the straight flute, makes the shield structure more firm.

Optionally, the device comprises an annular connecting seat (16), one end of each of the plurality of plungers (15) is fixed on the end surface of the connecting seat (16), and the plungers (15) are circumferentially and uniformly distributed on the connecting seat (16).

Through adopting above-mentioned technical scheme, during operating personnel grafting plunger, the accessible connecting seat inserts the plunger simultaneously with a plurality of plungers, convenient operation. Because plunger and bearing inner wall interference fit, can strike the connecting seat with the plunger of impressing in order to install the shield when necessary, can clip the connecting seat with the centre gripping instrument and take out the plunger when dismantling the shield, reduce the damage to shield and bearing.

Optionally, the dust caps are respectively arranged on the upper end face and the lower end face of the ball bearing, the bearing inner ring comprises a fastening bolt, and the fastening bolt sequentially penetrates through the dust caps and the bearing inner ring.

Through adopting above-mentioned technical scheme, establish two shield covers on the bearing both ends and fix the back with the shield through the plunger when operating personnel, tight set bolt wears to locate two shields and bearing inner race in proper order, and when the tight set bolt of screwing, two shields compress tightly to the bearing inner race, realize two shield effect of fastening connection of each other.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when the dustproof cover rotates along with the bearing inner ring, the contact area between the tip of the dustproof sheet and the second annular groove of the bearing outer ring is small, heat generated by friction between the dustproof sheet and the second annular groove is small, and the condition that the local overheating of the bearing influences the performance of the bearing is reduced;

2. the inner shaft side of the dust cover is provided with a stop block which is clamped with the bearing inner ring, so that the structure is simple, and the dust cover is convenient for operators to install and dismantle;

3. one end of each plunger is fixed on the connecting seat, so that an operator can complete the actions of inserting, fixing or pulling out and disassembling the plurality of plungers simultaneously, and the operation is simpler and more convenient;

4. be provided with holding bolt on the bearing, and wear to establish two shield and bearings in proper order, make two shields press from both sides tightly to the bearing inner race, the structure is more firm.

Drawings

Fig. 1 is an exploded view of a ball bearing with a dust cap according to an embodiment of the present invention.

Fig. 2 is a cross-sectional view of a ball bearing with a dust cap.

Fig. 3 is an exploded view of the ball bearing without the dust cap.

Fig. 4 is a schematic structural view of the dust cap.

Fig. 5 is an enlarged schematic view of a portion a in fig. 4.

Description of reference numerals: 1. a dust cover; 2. a first dust-proof sheet; 3. a second dust-proof sheet; 4. a stopper; 5. mounting grooves; 6. a first through hole; 7. a second through hole; 8. tightening the bolt; 9. a first groove; 10. a first annular groove; 12. a straight groove; 13. a transverse groove; 14. a second annular groove; 15. a plunger; 16. a connecting seat; 17. reinforcing ribs; 18. a bearing inner race; 19. a bearing outer race; 21. a second groove; 22. a ball bearing; 23. a cage.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses a ball bearing with a dustproof cover. Referring to fig. 1 and 2, the ball bearing with the dust cap comprises a bearing inner ring 18 and a bearing outer ring 19, wherein an annular dust cap 1 is installed between the bearing inner ring 18 and the bearing outer ring 19, and a first dust-proof sheet 2 and a second dust-proof sheet 3, of which the tips abut against the inner wall of the bearing outer ring 19, are convexly arranged at one end, facing the inner wall of the bearing outer ring 19, of the dust cap 1.

The protruding dog 4 that is equipped with of inner circle of shield 1, be provided with the mounting groove 5 that supplies dog 4 joint on the outer wall of bearing inner race 18, bearing inner race 18 still wears to be equipped with two symmetric distribution's first through-hole 6. When the dust cover 1 is arranged on the ball bearing, a second through hole 7 is also formed in the position corresponding to the first through hole 6. The ball bearing is provided with a fastening bolt 8 which sequentially penetrates through the first through hole 6 and the second through hole 7, and the fastening bolt 8 is in threaded connection with the two dust covers 1 and the bearing inner ring 18. The fastening bolt 8 is fixedly connected with a dust cover 1 far away from the nut. When the fastening bolt 8 is screwed, the dust cap 1 close to the nut is pressed against the bearing inner ring 18 until the two end faces abut against each other, and the bearing inner ring 18 is pressed against the dust cap 1 far from the nut until the three abut against each other, so that a stable structure is formed.

Referring to fig. 2 and 3, the middle part of the outer wall of the bearing inner ring 18 is provided with a first groove 9 for the balls 22 to rotate, and the balls 22 are provided with a retainer 23, so that the balls 22 are separated from each other and do not shift position when rotating, and the function of guiding the balls 22 to rotate in the bearing is realized. The two ends of the outer wall of the bearing inner ring 18 are also provided with a first annular groove 10 abutted against the lower end face of the dust cover 1, and when the dust cover 1 is installed on the ball bearing, the lower end face of the dust cover 1 is abutted against the inner wall of the first annular groove 10. Three mounting grooves 5 are formed in the side wall of the first annular groove 10, and each mounting groove 5 comprises a straight groove 12 penetrating through the upper end face of the bearing inner ring 18 and a transverse groove 13 communicated with one end of the straight groove 12.

With continued reference to fig. 2 and 3, the middle portion of the inner wall of the outer bearing ring 19 is provided with a second groove 21 for the rotation of the balls 22, and the second groove 21 is matched with the first groove 9, so that the balls 22 can rotate between the outer bearing ring 19 and the inner bearing ring 18, and the balls 22 are prevented from separating from the bearing. The inner wall of the bearing outer ring 19 is also provided with a second annular groove 14 for the tips of the first dustproof sheet 2 and the second dustproof sheet 3 to abut against.

Referring to fig. 3 and 4, three stop blocks 4 are convexly arranged on the inner ring of the dust cover 1, and the three stop blocks 4 are uniformly distributed along the circumferential direction of the inner ring of the dust cover 1. When an operator sleeves the dust cap 1, the dust cap 1 is sleeved on the bearing inner ring 18, the stop block 4 is aligned to the straight groove 12, the stop block 4 is inserted into the straight groove 12 from the end face of the bearing inner ring 18 and slides along the axial direction of the ball bearing until the stop block 4 is abutted against the bottom wall of the straight groove 12, and then the dust cap 1 is rotated by a certain angle, so that the stop block 4 is abutted against the bottom wall of the transverse groove 13 away from the straight groove 12.

Referring to fig. 1 and 3, the stop 4 is used in cooperation with six plungers 15 provided on a bearing inner race 18. The length of the plunger 15 is matched with that of the straight groove 12, and a connecting seat 16 is fixed at one end of the plunger 15 far away from the transverse groove 13. The connecting seat 16 is ring-shaped, and the three plungers 15 are respectively and uniformly fixed on the end surface of the connecting seat 16 in the circumferential direction. After the stopper 4 slides to the end of the transverse groove 13 far away from the straight groove 12, the operator aligns the plungers 15 with the straight groove 12, and inserts the three plungers 15 into the straight groove 12 by means of the connecting seat 16. The lateral wall of plunger 15 butt in the lateral wall of dog 4 realizes plunger 15 to the limiting displacement of dog 4. On the other hand, the plunger 15 is in interference fit with the straight groove 12, so that the dust cover 1 and the ball bearing are prevented from axial deviation.

Referring to fig. 2, a first dust-proof sheet 2 and a second dust-proof sheet 3 are convexly arranged at one end of the dust-proof cover 1 facing the inner wall of the bearing outer ring 19, the tip end of the first dust-proof sheet 2, which is far away from the dust-proof cover 1, abuts against the inner angle of the second annular groove 14, the cross section of the tip end is in a semicircular arc shape, the outer side surface of the tip end abuts against the tip end of the two side surfaces of the inner angle of the second annular groove 14, so that the dust-proof effect is achieved, the contact area between the first dust-proof sheet 2 and the second annular groove 14 during rotational friction is reduced, and the heating condition of the ball bearing is reduced. The tip of the second dust-proof sheet 3 abuts against the lower bottom wall of the second annular groove 14, and the cross section of the tip is in a semicircular arc shape.

Referring to fig. 4 and 5, the first dust-proof sheet 2 is located outside the second dust-proof sheet 3, and a plurality of sections of reinforcing ribs 17 are arranged between the first dust-proof sheet 2 and the second dust-proof sheet 3, so that the connecting structure strength of the first dust-proof sheet 2 and the second dust-proof sheet 3 is enhanced, the first dust-proof sheet is not easy to deform when stressed, and the reliability of the dust-proof cover 1 in use is enhanced.

The implementation principle of the ball bearing with the dust cover 1 in the embodiment of the application is as follows: the dust cover 1 is fixedly inserted with the bearing inner ring 18 through a convex block arranged on the inner ring, and a first dust-proof sheet 2 and a second dust-proof sheet 3 which are respectively abutted against the inner wall of the second annular groove 14 of the bearing outer ring 19 are convexly arranged at one end, facing the inner wall of the bearing outer ring 19, of the dust cover 1. Accordingly, the dust cap 1 forms a closed space with the ball bearing, and functions to prevent dust from entering the ball bearing or leakage of the lubricating oil in the ball bearing. When the bearing inner ring 18 rotates, the dustproof cover 1 rotates along with the rotation, the tips of the first dustproof sheet 2 and the second dustproof sheet 3 are respectively abutted to the second annular groove 14, the contact area during friction is reduced, and the local overheating condition of the ball bearing is reduced.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a take ball bearing of shield, ball bearing includes bearing inner race (18), set up in bearing inner race (18) with ball (22), the holder (23) that supply ball (22) to place between bearing inner race (18), its characterized in that: bearing inner race (18) are installed and are annular shield (1), shield (1) orientation the protruding first dust guard (2) that are equipped with most advanced butt in bearing outer race (19) inner wall of one end of bearing outer race (19) inner wall.

2. The ball bearing with dust cap according to claim 1, characterized in that: the inner wall of the bearing outer ring (19) is provided with a second annular groove (14), and the tip of the first dustproof sheet (2) abuts against the inner wall of the second annular groove (14).

3. The ball bearing with dust cap according to claim 2, characterized in that: one end of the dustproof cover (1) facing the inner wall of the bearing outer ring (19) is convexly provided with a second dustproof sheet (3) of which the tip end is abutted to the inner wall of the second annular groove (14).

4. The ball bearing with dust cap according to claim 3, characterized in that: the cross sections of the tips of the first dustproof sheet (2) and the second dustproof sheet (3) are in a semicircular arc shape.

5. The ball bearing with dust cap according to claim 4, characterized in that: a plurality of reinforcing ribs (17) are circumferentially and uniformly distributed between the first dustproof sheet (2) and the second dustproof sheet (3).

6. The ball bearing with dust cap according to claim 1, characterized in that: the inner ring of the dust cover (1) is convexly provided with a stop block (4), and a plurality of mounting grooves (5) for the stop block (4) to be clamped are circumferentially arranged on the bearing inner ring (18).

7. The ball bearing with dust cap according to claim 6, characterized in that: the bearing inner ring (18) comprises a plurality of plungers (15) inserted in the mounting groove (5), and the plungers (15) are inserted in the mounting groove (5) in an interference manner and then abut against the end face of the stop block (4).

8. The ball bearing with dust cap according to claim 7, wherein: mounting groove (5) are "L" form, mounting groove (5) are including supplying straight flute (12) of dog (4) joint, straight flute (12) one end is located the terminal surface of bearing inner race (18), and the other end intercommunication has transverse groove (13), transverse groove (13) supply dog (4) joint, plunger (15) interference peg graft in back butt in straight flute (12) the side end face of dog (4).

9. The ball bearing with dust cap according to claim 7, wherein: the ball bearing comprises an annular connecting seat (16), one end of each plunger (15) is fixed on the end face of the connecting seat (16), and the plungers (15) are circumferentially and uniformly distributed on the connecting seat (16).

10. The ball bearing with dust cap according to claim 1, characterized in that: the dustproof cover (1) is respectively arranged on the upper end face and the lower end face of the ball (22) bearing, the bearing inner ring (18) comprises a fastening bolt (8), and the fastening bolt (8) sequentially penetrates through the dustproof cover (1) and the bearing inner ring (18).