Hub bearing with adjustable clearance

Abstract

The utility model discloses a hub bearing with an adjustable clearance. The hub bearing comprises a mounting flange plate, a hub flange plate and two groups of tapered roller bearings which are symmetrically arranged, the tapered roller bearing is composed of an outer ring seat, an inner ring seat and cylindrical rollers arranged in an inclined mode, and the inner ring seat and the hub flange plate are coaxially fixed. An annular elastic piece, an adjusting backing ring, an acting key and an adjusting ring seat are arranged on the mounting flange plate, and the two ends of the outer ring seat abut against the annular elastic piece and the adjusting backing ring respectively. The inner side of the acting key pushes the adjusting backing ring to move axially through an inclined face, and the outer side of the acting key is matched with the adjusting ring base. And the adjusting ring seat is screwed to drive the acting key to radially displace so as to adjust the bearing clearance. The utility model has a compact structure, can dynamically adjust the clearance, improves the bearing capacity and prolongs the service life, and is suitable for various vehicle hub systems.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of wheel hub bearing, and specifically relates to a wheel hub bearing with adjustable play. BACKGROUND

[0002] As a key component of automobile chassis system, the performance of wheel hub bearing directly affects the carrying capacity, steering stability and driving safety of the vehicle. The traditional wheel hub bearing usually adopts deep groove ball bearing or angular contact ball bearing to realize the adjustment of axial and radial play through pre-tightening assembly. However, such bearings are prone to rigidity decline due to increased play when subjected to complex alternating loads for a long time, which further leads to abnormal sound, vibration and even early failure. In addition, the play adjustment of the existing wheel hub bearing mainly depends on the increase or decrease of gaskets or nut pre-tightening during assembly, and the whole wheel hub unit needs to be disassembled for later maintenance, which is complicated and difficult to achieve precise adjustment.

[0003] To solve the above problems, a wheel hub unit design using tapered roller bearings has appeared in the prior art, which can simultaneously bear axial and radial loads through the inclined surface cooperation of tapered rollers and inner and outer ring raceways.

[0004] The existing wheel hub bearing technology has the following defects: (1) the play adjustment depends on static assembly and cannot be dynamically adjusted during use; (2) the adjustment mechanism is complex and the maintenance cost is high; (3) the traditional bearing design is difficult to balance high load capacity and play controllability. Therefore, there is an urgent need for a wheel hub bearing scheme with compact structure, dynamic play adjustment and excellent load capacity to meet the needs of modern automobiles for high reliability, low maintenance cost and long service life. INVENTION CONTENTS

[0005] In view of the above deficiencies in the prior art, the utility model aims to provide a wheel hub bearing with adjustable play, which not only has the characteristics of high load capacity and long service life, but also can realize dynamic play adjustment, significantly improve the driving stability and maintenance convenience of the vehicle, and is suitable for various application scenarios such as passenger cars, commercial vehicles and special vehicles.

[0006] The technical scheme adopted by the utility model to achieve the above-mentioned purpose is: a wheel hub bearing with adjustable play, comprising a mounting flange, a wheel hub flange and a tapered roller bearing, the wheel hub flange is sleeved to the inner side of the mounting flange, the tapered roller bearing comprises two groups and is arranged in a symmetrical posture between the mounting flange and the wheel hub flange, the tapered roller bearing comprises an outer ring seat, an inner ring seat and a cylindrical roller, the inner ring seat is coaxially fixed with the wheel hub flange, and the cylindrical roller is assembled between the outer ring seat and the inner ring seat and arranged in an inclined manner.

[0007] Further comprising annular elastic members, adjusting gaskets, action keys, adjusting ring seats assembled to the mounting flange plate, the outer end face and the inner end face of each group of the outer ring seat respectively abutting the annular elastic members and the adjusting gaskets, the action keys being slidably inserted into the sidewall of the mounting flange plate and sliding in the radial direction, the action keys being arranged between the two groups of adjusting gaskets, the inner side end of the action keys extending to the inner side of the mounting flange plate and being in contact with the adjusting gaskets, the adjusting ring seats being screwed to the periphery of the mounting flange plate, and the outer side end of the action keys extending to the outer side of the mounting flange plate and being in contact with the adjusting ring seats.

[0008] On the basis of the above technical solution, in order to ensure that the adjusting ring seat can control the axial displacement of the adjusting gaskets on both sides through the action keys during the screwing process, the following specific technical solutions are provided.

[0009] The inner side end of the action key is provided with two groups of symmetrically arranged action inclined surfaces A, and the two groups of adjusting gaskets are each provided with a guide inclined groove matched with the action inclined surface A. The outer side end of the action key is provided with an action inclined surface B, and the inner wall of the adjusting ring seat is provided with a tapered section matched with the action inclined surface B.

[0010] On the basis of the above technical solution, in order to ensure that the adjusting ring seat can be effectively assembled in a screwing manner on the outer side of the mounting flange plate and ensure the sealing effect of the inner cavity of the mounting flange plate, the following technical solutions are provided.

[0011] The mounting flange plate comprises a bearing outer ring and a flange plate A fixed as a unified whole. The outer wall of the bearing outer ring is provided with a threaded groove A. The flange plate A is fixedly connected with an assembly sleeve arranged on the outer side of the threaded groove A. The assembly sleeve is filled with a sealing rubber ring. The adjusting ring seat is sleeved on the inner side of the assembly sleeve and abuts against the sealing rubber ring. The inner wall of the adjusting ring seat is provided with a threaded groove B matched with the threaded groove A.

[0012] On the basis of the above technical solution, in order to ensure that the annular elastic members, the outer ring seat and the adjusting gaskets can be stably assembled in the bearing inner cover outer ring, the following technical solutions are provided.

[0013] The inner side end of the bearing outer ring is fixedly connected with an annular gasket seat. The outer side end of the bearing outer ring is provided with a positioning clamping groove. The positioning clamping groove is detachably nested with a positioning clamping hoop. The annular elastic member on the inner side end of the bearing outer ring abuts against the annular gasket seat. The annular elastic member on the outer side end of the bearing outer ring abuts against the positioning clamping hoop. The cross section of the annular gasket seat is S-shaped.

[0014] On the basis of the above technical scheme, in order to ensure that the tapered roller bearing can be effectively assembled between the mounting flange plate and the hub flange plate, ensure that the inner ring seat can be stably assembled on the hub flange plate and realize fixed combination, the following technical scheme is provided.

[0015] The hub flange plate comprises a bearing inner ring, a flange plate B, a center nut A and a center nut B, a positioning table is fixedly connected to the periphery of the bearing inner ring, the flange plate B and the inner ring seat are both sleeved on the bearing inner ring and are distributed on the two sides of the positioning table, a spacing ring sleeved on the bearing inner ring is arranged between the two groups of inner ring seats, the center nut A is screwed to the inner side end of the bearing inner ring and positions the inner ring seat and the spacing ring, and the center nut B is screwed to the outer side end of the bearing inner ring and positions the flange plate B.

[0016] The utility model discloses beneficial effects:

[0017] 1. Dynamic adjustable play, improve bearing life and stability, by screwing the adjusting ring seat, driving the key radial movement, and then pushing the adjusting grommet axial displacement, the play between the outer ring seat and the inner ring seat of the tapered roller bearing is accurately adjusted. This structure can realize dynamic compensation of play without disassembling the bearing, effectively avoid the problem of increasing play caused by wear, prolong the service life of the bearing, and reduce vibration and noise.

[0018] 2. Axial and radial play synchronous adjustment, improve the carrying capacity, since the raceway of the tapered roller bearing adopts conical surface design, the axial movement of the outer ring seat can change the axial and radial play at the same time, ensuring that the bearing can maintain the best matching clearance under different load conditions. The double-row symmetrical arrangement of the tapered roller bearing further enhances the carrying capacity of the axial and radial load, and is suitable for high load working conditions.

[0019] 3. Compact structure, convenient adjustment, adopt annular elastic piece automatic compensation play, combine the slope drive mechanism of the key, make the adjustment process more efficient and stable. The adjusting ring seat realizes axial displacement through thread cooperation, and the operation is simple and convenient without special tools, which is convenient for maintenance and adjustment.

[0020] 4. Good sealing property, adapt to severe environment, sealing rubber ring is arranged between the mounting flange plate and the adjusting ring seat, which can effectively prevent external pollutants (such as water and silt) from entering the bearing, and improve the reliability and durability of the bearing under complex road conditions.

[0021] 5. Modular design, flexible assembly, the hub flange plate adopts a split structure of bearing inner ring and flange plate B, which is convenient for the installation and maintenance of the tapered roller bearing. The inner ring seat is fixed by the center nut, which ensures the assembly accuracy, and is suitable for the application scenes of driving wheels (with spline holes) and non-driving wheels.

[0022] 6. Elastic element automatic compensation, reduce manual intervention, annular elastic piece always provides reverse thrust for outer ring seat, makes bearing automatically adapt to play variation in running process, reduces performance decline caused by looseness or wear, improves overall reliability. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a structural schematic view of the utility model;

[0024] Figure 2 It is a structural schematic view of the utility model; Figure 1 It is a structural schematic view of the utility model from another angle;

[0025] Figure 3 It is a structural schematic view of the utility model;

[0026] Figure 4 It is a structural schematic view of the utility model of mounting flange plate;

[0027] Figure 5 It is a structural schematic view of the utility model of outer ring seat, annular elastic piece, adjusting gasket ring, action key and adjusting ring seat matched combination;

[0028] Figure 6 It is a structural schematic view of the utility model of bearing inner ring, inner ring seat and positioning platform matched combination;

[0029] Figure 7 It is a structural schematic view of the utility model of adjusting gasket ring, action key and adjusting ring seat in disassembled state.

[0030] In the drawing: 1 mounting flange plate, 11 bearing outer ring, 12 flange plate A, 13 threaded groove A, 14 assembly sleeve, 15 sealing rubber ring, 16 annular gasket seat, 17 positioning clamping groove, 18 positioning clamp, 2 hub flange plate, 21 bearing inner ring, 22 flange plate B, 23 center nut A, 24 center nut B, 25 positioning platform, 26 spacer ring, 27 spline hole, 3 tapered roller bearing, 31 outer ring seat, 32 inner ring seat, 33 cylindrical roller, 34 retainer, 4 annular elastic piece, 41 gasket, 5 adjusting gasket ring, 51 guide inclined slot, 6 action key, 61 action inclined surface A, 62 action inclined surface B, 7 adjusting ring seat, 71 conical section, 72 threaded groove B. DETAILED DESCRIPTION

[0031] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model.

[0032] Please refer to Figures 1-7The application discloses a kind of adjustable play hub bearings, including mounting flange plate 1, hub flange plate 2, tapered roller bearing 3, hub flange plate 2 is set to the inside of mounting flange plate 1, tapered roller bearing 3 includes two groups and is arranged between mounting flange plate 1 and hub flange plate 2 in symmetrical posture, tapered roller bearing 3 includes outer ring seat 31, inner ring seat 32 and cylindrical roller 33, inner ring seat 32 is coaxially fixed with hub flange plate 2, cylindrical roller 33 is assembled between outer ring seat 31 and inner ring seat 32 and is arranged in inclined.

[0033] It further includes annular elastic member 4 assembled to mounting flange plate 1, adjusting washer 5, action key 6, adjusting ring seat 7, the outer end surface of each group of outer ring seat 31, inner end surface respectively abuts with annular elastic member 4, adjusting washer 5, action key 6 is slidably inserted into the side wall of mounting flange plate 1 and slides along the radial direction, action key 6 is arranged between two adjusting washers 5, the inner side end of action key 6 extends to the inside of mounting flange plate 1 and is in contact with adjusting washer 5, adjusting ring seat 7 is screwed to the periphery of mounting flange plate 1, the outer side end of action key 6 extends to the outside of mounting flange plate 1 and is in contact with adjusting ring seat 7.

[0034] By using tapered roller bearing 3, when the outer ring seat 31 thereof is axially moved and adjusted, since the raceways in contact with cylindrical roller 33 are all conical surfaces, the axial play and radial play thereof can be simultaneously adjusted.And by using two groups of coaxially and symmetrically arranged tapered roller bearings 3, loads from the axial and radial directions can be better borne.

[0035] Tapered roller bearing 3 further includes retainer 34 to realize accurate positioning of each cylindrical roller 33 therein.

[0036] Annular elastic member 4 can exert an opposite axial thrust on outer ring seat 31 to drive outer ring seat 31 to move to one side of adjusting washer 5, and has a tendency to reduce the play of cylindrical roller 33.In the process of screwing adjusting ring seat 7, the axial displacement of adjusting ring seat 7 can be converted into the radial displacement of action key 6, and the radial displacement of action key 6 can further push adjusting washer 5 and outer ring seat 31 to axially displace, thereby effectively adjusting the size of play.

[0037] Action key 6 can be provided in multiple groups in annular array distribution to stably receive and transmit force.

[0038] To ensure that adjusting ring seat 7 can control the axial displacement of adjusting washer on both sides through action key 6 in the process of screwing, the following specific technical solutions are provided.

[0039] The inner side end of the action key 6 is provided with two groups of symmetrically arranged action inclined surfaces A61, two groups of the adjusting gasket rings 5 are each provided with a guide inclined groove 51 matched with the action inclined surface A61, the outer side end of the action key 6 is provided with an action inclined surface B62, and the inner wall of the adjusting ring seat 7 is provided with a tapered section 71 matched with the action inclined surface B62.

[0040] When the adjusting ring seat 7 is screwed, the different arrangements of the tapered section 71 thereon can be matched with the action inclined surface B62 of the action key 6, so as to control the radial displacement amount of the action key 6. When the action key 6 approaches the axis of the hub flange plate 2, the action inclined surface A61 thereon can act on the guide inclined grooves 51 arranged on the two adjusting gasket rings 5, so as to push the adjusting gasket rings 5 and the outer ring seat 31 to move to one side of the corresponding annular elastic member 4, further compress the annular member, and increase the clearance. When the adjusting ring seat 7 is unscrewed in the opposite direction and the action key 6 moves outward, the elastic member releases the elastic force to push the outer ring seat 31 and the annular gasket seat 16 to move in the opposite direction, so as to keep the annular gasket seat 16 matched with the action key 6, and reduce the clearance.

[0041] In order to ensure that the adjusting ring seat 7 can be effectively assembled on the outer side of the mounting flange plate 1 by screwing, and ensure the sealing effect of the inner cavity of the mounting flange plate 1, the following technical solutions are provided.

[0042] The mounting flange plate 1 includes a bearing outer ring 11 and a flange plate A 12 fixed as a unified whole. The outer wall of the bearing outer ring 11 is provided with a threaded groove A 13, the flange plate A 12 is fixedly connected with an assembly sleeve 14 arranged outside the threaded groove A 13, the assembly sleeve 14 is filled with a sealing rubber ring 15, the adjusting ring seat 7 is sleeved on the inner side of the assembly sleeve 14 and abuts against the sealing rubber ring 15, and the inner wall of the adjusting ring seat 7 is provided with a threaded groove B 72 matched with the threaded groove A 13.

[0043] Through the combination of the threaded groove A 13 and the threaded groove B 72, the adjusting ring seat 7 can be stably screwed and axially displaced, so as to adjust the radial displacement amount of each group of action keys 6. The flange plate A 12 is used for connecting the mounting flange plate 1 and the automobile suspension system, the sealing rubber ring 15 can ensure the sealing effect of the inner port of the adjusting ring seat 7, and the bearing outer ring 11 is used for effectively assembling the adjusting gasket ring 5, the annular elastic member 4, the outer ring seat 31, the adjusting ring seat 7 and other components.

[0044] In order to ensure that the annular elastic member 4, the outer ring seat 31 and the adjusting gasket ring 5 can be stably assembled in the bearing inner cover outer ring, the following technical solutions are provided.

[0045] The inner side end of the bearing outer ring 11 is fixedly connected with an annular pad seat 16, and the outer side end of the bearing outer ring 11 is provided with a positioning clamping groove 17, and the positioning clamping groove 17 is detachably nested with a positioning clamping hoop 18, the annular elastic member 4 at the inner side end of the bearing outer ring 11 abuts against the annular pad seat 16, the annular elastic member 4 at the outer side end of the bearing outer ring 11 abuts against the positioning clamping hoop 18, and the cross section of the annular pad seat 16 is S-shaped.

[0046] The annular elastic member 4 with an S-shaped cross section can effectively support the outer ring seat 31, the annular pad seat 16 or the positioning clamping hoop 18 on both sides, and a gasket 41 is further arranged at both ends of the annular elastic member 4 to avoid direct contact with the outer ring seat 31, the annular pad seat 16 or the positioning clamping hoop 18.

[0047] The outer ring seat 31 and the adjusting gasket 5 are assembled into the bearing outer ring 11 in a clearance fit manner to facilitate the axial movement of the outer ring seat 31 and the adjusting gasket 5 in the bearing outer ring 11.

[0048] In order to ensure that the tapered roller bearing 3 can be effectively assembled between the mounting flange plate 1 and the hub flange plate 2, and to ensure that the inner ring seat 32 can be stably assembled on the hub flange plate 2 and fixedly combined, the following technical solutions are provided.

[0049] The hub flange plate 2 comprises a bearing inner ring 21, a flange plate B 22, a center nut A 23 and a center nut B 24, the periphery of the bearing inner ring 21 is fixedly connected with a positioning table 25, the flange plate B 22 and the inner ring seat 32 are both sleeved on the bearing inner ring 21 and are distributed on both sides of the positioning table 25, a spacer ring 26 is arranged between the two groups of inner ring seats 32 and is sleeved on the bearing inner ring 21, the center nut A 23 is screwed to the inner side end of the bearing inner ring 21 and positions the inner ring seat 32 and the spacer ring 26, and the center nut B 24 is screwed to the outer side end of the bearing inner ring 21 and positions the flange plate B 22.

[0050] Since the tapered roller bearing 3 is adopted, in order to facilitate the effective installation of the tapered roller bearing 3 in the mounting flange plate 1 and the hub flange plate 2, the flange plate B 22 and the bearing inner ring 21 are arranged in a split type, and after the complete installation of the bearing inner ring 21, the tapered roller bearing 3 and the mounting flange plate 1 is completed, the installation work of the flange plate B 22 is performed, which can simplify the assembly process and operation mode of the hub bearing.

[0051] The inner ring seat 32 and the spacer ring 26 are assembled onto the bearing inner ring 21 in an interference fit manner, and for the hub bearing used for driving wheels, the bearing inner ring 21 is further provided with a spline hole 27 for connecting a driving half shaft.

[0052] It is apparent for a person skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary and non-limiting, the scope of the present application being defined by the claims appended hereto rather than by the above description, and all the changes which fall within the meaning and the scope of the equivalent elements of the claims are intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.

[0053] Furthermore, it should be understood that although the present specification describes exemplary embodiments, not every embodiment contains only one independent technical solution, and the present specification is described in this way only for the sake of clarity, and a person skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that a person skilled in the art can understand.

Claims

1. An adjustable play hub bearing, comprising a mounting flange (1), a hub flange (2), and a tapered roller bearing (3), the hub flange (2) being sleeved to the inner side of the mounting flange (1), the tapered roller bearing (3) being arranged between the mounting flange (1) and the hub flange (2) in two groups and in a symmetrical posture, the tapered roller bearing (3) comprising an outer ring seat (31), an inner ring seat (32), and cylindrical rollers (33), the inner ring seat (32) being coaxially fixed with the hub flange (2), the cylindrical rollers (33) being assembled between the outer ring seat (31) and the inner ring seat (32) and arranged in an inclined manner. characterized in that Further comprising a ring-shaped elastic member (4), an adjusting spacer ring (5), an action key (6), and an adjusting ring seat (7) assembled to the mounting flange (1), the outer end face and the inner end face of each group of the outer ring seat (31) being respectively abutted with the ring-shaped elastic member (4) and the adjusting spacer ring (5), the action key (6) being slidingly inserted into the side wall of the mounting flange (1) and sliding in the radial direction, the action key (6) being arranged between the two groups of the adjusting spacer ring (5), the inner side end of the action key (6) extending to the inner side of the mounting flange (1) and being in contact with the adjusting spacer ring (5), the adjusting ring seat (7) being screwed to the periphery of the mounting flange (1), the outer side end of the action key (6) extending to the outer side of the mounting flange (1) and being in contact with the adjusting ring seat (7).

2. A wheel hub bearing with adjustable play according to claim 1, characterized in that The inner side end of the action key (6) is provided with two groups of symmetrically arranged action inclined surfaces A (61), two groups of the adjusting spacer ring (5) are each provided with a guide inclined groove (51) matched with the action inclined surface A (61), the outer side end of the action key (6) is provided with an action inclined surface B (62), and the inner wall of the adjusting ring seat (7) is provided with a conical section (71) matched with the action inclined surface B (62).

3. A wheel hub bearing with adjustable play according to claim 1, characterized in that: The mounting flange (1) comprises a bearing outer ring (11) and a flange A (12) fixed as a unified whole, the outer wall of the bearing outer ring (11) is provided with a threaded groove A (13), the flange A (12) is fixedly connected with an assembly sleeve (14) arranged outside the threaded groove A (13), the assembly sleeve (14) is filled with a sealing rubber ring (15), the adjusting ring seat (7) is sleeved to the inner side of the assembly sleeve (14) and abuts against the sealing rubber ring (15), and the inner wall of the adjusting ring seat (7) is provided with a threaded groove B (72) matched with the threaded groove A (13).

4. A wheel hub bearing with adjustable play according to claim 3, characterized in that: The inner side end of the bearing outer ring (11) is fixedly connected with a ring-shaped pad seat (16), the outer side end of the bearing outer ring (11) is provided with a positioning clamping groove (17), and the positioning clamping groove (17) is detachably nested with a positioning clamping hoop (18), the ring-shaped elastic member (4) at the inner side end of the bearing outer ring (11) abuts against the ring-shaped pad seat (16), the ring-shaped elastic member (4) at the outer side end of the bearing outer ring (11) abuts against the positioning clamping hoop (18), and the cross section of the ring-shaped pad seat (16) is S-shaped.

5. A wheel hub bearing with adjustable play according to claim 1, characterized in that: The hub flange plate (2) comprises a bearing inner ring (21), a flange plate B (22), a center nut A (23), a center nut B (24), the periphery of the bearing inner ring (21) is fixedly connected with a positioning table (25), the flange plate B (22) and the inner ring seat (32) are both sleeved on the bearing inner ring (21) and are distributed on the two sides of the positioning table (25), the two groups of inner ring seats (32) are arranged with a spacing ring (26) sleeved on the bearing inner ring (21), the center nut A (23) is screwed to the inner side end of the bearing inner ring (21) and positions the inner ring seat (32) and the spacing ring (26), and the center nut B (24) is screwed to the outer side end of the bearing inner ring (21) and positions the flange plate B (22).

Images