CN209324875U

CN209324875U - For keeping the load retainer and bearing of the high load depth of parallelism

Info

Publication number: CN209324875U
Application number: CN201821594617.0U
Authority: CN
Inventors: 林明
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-09-28
Filing date: 2018-09-28
Publication date: 2019-08-30
Anticipated expiration: 2028-09-28

Abstract

The utility model discloses a kind of for keeping the load retainer of the high load depth of parallelism, including annular holding frame body and it is mounted on the preload piece and gap mainlining member that keep on frame body, multiple gap mainlining members are arranged in the inner ring surface or outer ring surface for keeping frame body along the circumferential array for keeping frame bodies；The outer peripheral surface of frame body is kept to offer in the multiple limit holes for keeping the circumferentially-spaced setting of frame body, the inner wall of each limit hole is fixed at least one preload piece for circumferentially upper Elastic pusher load.The load retainer of the utility model can remain the depth of parallelism of axial high precision with proof load in transmission process, equipment running process is avoided to suffer the appearance of noise, vibration, damage etc. to the maximum extent, each load being axially arranged is relative to axis line location in high-precision axial parastate, it is supported on the rolling that may be at free shape in the gap between driving wheel and driven wheel, rolling transmitting, greatly extends the service life of bearing.

Description

For keeping the load retainer and bearing of the high load depth of parallelism

Technical field

The utility model relates to machine drivings and Transfer Technology field, more particularly to one kind is for keeping the high load depth of parallelism Load retainer and bearing.

Background technique

In global machine driving industry, the structural phenomenon of " low precision axial line parallel loads " application is to restrict row The basic sexual dysfunction of industry technology development.

Here, so-called " axis parallel load " refers to, in traditional mechanical transmission structure such as freewheel clutch, bearing Etc. in similar structure, torque transmitted to driven wheel by driving wheel or driving wheel is rotated relative to driven wheel In the process, between driving wheel and driven wheel, for transmitting torque or keeping the load in gap between driving wheel and driven wheel Axial line need it is parallel with transmission shaft without deflecting, it is this kind of load usually in the form of roller bearing, voussoir etc. appearance, ideal shape Under state, in the same product, the length direction (direction of axis line) of these loads should be with driving wheel/driven wheel axial one It causes, just can guarantee each effect for being supported on and both participating in torque transmitting or transmission in driving wheel/driven wheel transmission process in this way.

However, even if the production precision of driving wheel and driven wheel is very high, the radial and axial size of the two with load Accurate matching, in actual mechanical transmission course, such load occur with having no sign it is axially inclined and no longer with transmission It is axial parallel, cause individually to load only local pressure and stress concentration occur, the stress between each load also can not be consistent, causes There is unbalance stress in entire drive mechanism, shows as concentrated wear, deformation, conquassation etc., noise, vibration, damage etc. occurs, seriously Shorten the service life of drive mechanism.

Also occur the design of some axial depth of parallelisms for being used to improve these loads on the market at present, it is most representative Load retainer is exactly designed in drive mechanism, it is therefore intended that so that axially retaining for respectively loading is consistent, however, due to this Retainer is simultaneously not fixed, but is suspended between driving wheel and driven wheel, causes the position of retainer itself that cannot accurately fix, The accurate axial depth of parallelism for how realizing load less talked.Such defect is especially in freewheel clutch and high speed, heavy load axis Hold etc. showed in transmission basic part it is particularly evident.

Ideally, each load being axially arranged is relative to axis line location in high-precision axial parastate, load Rolling, rolling transmitting in gap between driving wheel and driven wheel in free shape；However, working as each load being axially arranged If can not accomplish that high-precision is parallel, it is strong for leading to the working condition in gap when its work between driving wheel and driven wheel The extruding rolling of state processed is transmitted.

As shown in Figure 1, being the shaft strength schematic diagram of existing truck, bearing includes inner ring A, outer ring B, roller C It is mounted on fixed central axis with roller rolling retainer D, the inner ring A of bearing without can rotate, outer ring B is rotated clockwise, by vapour Vehicle gravity, inner ring A passes through the roller C being below and applies certain pressure to outer ring B, and the roller C in top is then It is in idling conditions not by pressure, since the position of roller rolling retainer D itself has no constraint, and is used on roller rolling retainer D The limit pore size for accommodating roller C has no in limit hole the physical constraint power in circumferential direction also greater than roller C, roller C and is caused Its both ends is in the state arbitrarily swung, and the roller C that top is in idling conditions is arbitrarily swung in the case where not by pressure, when It is with lower section is entered in the B rotation process of outer ring when, since it is not to be substantially parallel with the axial direction of bearing, in its rotation process When simultaneously by inner ring A, outer ring B extruding force, then the extruding rolling transmitting of forced regime can occur, when roller C enters bottom When the extruding force that is subject to it is maximum.Roller C and inner ring A, outer ring B are in linear contact state in the ideal situation, when roller C is in When beat state, the extrados of roller C and inner ring A be in single-point (contact point at close middle part on roller) contact condition and by Power, the intrados of roller C and outer ring B be in two o'clock (by the contact point of two close end on roller) contact condition and stress, that is, are formed So-called " the extruding rolling of forced regime is transmitted ", in general, the beat amplitude at the both ends roller C is bigger, and both ends are limited Radial clearance in suffered extruding force it is bigger, generated noise, vibration, damage are bigger, for the inner ring A, outer of bearing Abrasion, the damage for enclosing B are also bigger.

Such bearing is after some time of use, on the one hand, roller occurs to squeeze rolling and transmit to cause to roll for a long time Phenomena such as column is deformed, is seriously worn, being crushed, on the other hand, the inner ring and outer ring of bearing, must for a long time by improper extruding So there is irregular impression, indent etc., the running clearance of roller further increases and in irregular gap, further decreases The damage process of the axially aligned precision of roller, bearing is further speeded up, and existing bearing life is caused generally to shorten, and roller is protected Frame is held not play a significant role actually.

Utility model content

In view of the shortcomings of the prior art, the utility model provides a kind of for keeping the load of the high load depth of parallelism Retainer and bearing, it is ensured that load still maintains the high-precision axial depth of parallelism in the process of running, is substantially improved and finishes Structure operation stability and reliability reduce noise, also greatly extend the service life of bearing.

In order to achieve the above purpose, the utility model uses the following technical solution:

It is a kind of for keeping the load retainer of the high load depth of parallelism, including annular holding frame body and be mounted on institute State keep frame body on elasticity preload piece and gap mainlining member, the gap mainlining member be it is multiple, along the retainer master The circumferential array of body it is arranged in the inner ring surface or outer ring surface for keeping frame body；The outer peripheral surface for keeping frame body opens up Have in the multiple limit holes for keeping the circumferentially-spaced setting of frame body, the limit hole is along the axial direction for keeping frame body Extend, loads across and accommodate so that rolling is columnar, the inner wall of each limit hole is fixed at least one for circumferentially The preload piece of load described in upper Elastic pusher.

As one of embodiment, the inner ring surface for keeping frame body or outer ring surface are offered and are protected for the gap The groove that gripping member is embedded, the gap mainlining member is rollably set in the groove and diameter is greater than the trench depth.

As one of embodiment, in a ring, the gap mainlining member is in the circumferential direction of the groove for the groove Close-packed arrays.

As one of embodiment, the groove at least two, two grooves are in the holding frame body Axial direction on be spaced setting.

As one of embodiment, the holding frame body includes two intervals and cricoid positioning ring is arranged in face And more attachment beams being connected between two positioning rings, the groove are provided with the inner ring surface or outer ring of the positioning ring Face；The limit hole is formed between two adjacent attachment beams, and the preload is fixed on the every attachment beam Part.

As one of embodiment, the inner wall of each limit hole is fixed, and there are two the preload piece, Mei Gesuo Two different parts that two in limit hole preload pieces are respectively used in the axial direction for keeping frame body are stated to push The load.

As one of embodiment, the gap mainlining member is ball or roller.

As one of embodiment, each limit hole includes the phase in the rotation direction for keeping frame body Pair the first inner wall and the second inner wall, the preload piece be set to each limit hole first inner wall and free end direction Second inner wall extends.

As one of embodiment, first inner wall and second inner wall of each limit hole are mutually flat Row.

The another object of the utility model is to provide a kind of bearing, including inner ring, outer ring, load and described for keeping The load retainer of the high load depth of parallelism, it is described load be it is multiple, rollably be set between the inner ring and the outer ring；Institute It states for keeping the load retainer of the high load depth of parallelism to be set between the inner ring and the outer ring, the gap mainlining member can Rollably it is arranged between the holding frame body and the inner ring outer ring surface or the holding frame body and the outer ring inner ring Between face；The load is contained in the limit hole, and elasticity abuts the retainer master under the action of preload piece Body.

The load retainer of the utility model can remain axial high precision with proof load in transmission process The depth of parallelism avoids equipment running process from suffering the appearance of noise, vibration, damage etc., each load being axially arranged to the maximum extent Relative to axis line location in high-precision axial parastate, being supported in the gap between driving wheel and driven wheel be may be at Rolling, the rolling transmitting of free shape, realize the stress of perfect condition, greatly extend the service life of bearing.

Detailed description of the invention

Fig. 1 is the stress diagram in the use process of the heavy-duty bearing of the prior art；

Fig. 2 is a kind of structural decomposition diagram of bearing of the utility model embodiment；

Fig. 3 is a kind of structural schematic diagram of bearing of the utility model embodiment；

Fig. 4 be Fig. 3 K-K to cross-sectional view；

Fig. 5 be Fig. 4 M-M to cross-sectional view；

Fig. 6 is a kind of structural decomposition diagram of load retainer of the utility model embodiment；

Fig. 7 is the structural decomposition diagram of another bearing of the utility model embodiment；

Fig. 8 is the structural schematic diagram of another bearing of the utility model embodiment；

Fig. 9 be Fig. 8 K1-K1 to cross-sectional view；

Figure 10 be Fig. 9 M1-M1 to cross-sectional view.

Specific embodiment

In the present invention, term " setting ", " being equipped with ", " connection " shall be understood in a broad sense.For example, it may be fixed connect It connects, is detachably connected or monolithic construction；It can be mechanical connection, or electrical connection；It can be directly connected, or pass through Intermediary is indirectly connected, or is two connections internal between device, element or component.It is common for this field For technical staff, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.

In addition, term " on ", "lower", "left", "right", "top", "bottom", " clockwise ", " counterclockwise ", "inner", "outside", " in ", "vertical", the instructions such as "horizontal" orientation or positional relationship be to be based on the orientation or positional relationship shown in the drawings.These arts Language is not intended to limit indicated device, element or group primarily to better describe the utility model and embodiment There must be particular orientation at part, or be constructed and operated with particular orientation.

Also, above-mentioned part term is other than it can be used to indicate that orientation or positional relationship, it is also possible to for indicating it His meaning, such as term " on " also are likely used for indicating certain relations of dependence or connection relationship in some cases.For ability For the those of ordinary skill of domain, the concrete meaning of these terms in the present invention can be understood as the case may be.

In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation The utility model is further described in example.It should be appreciated that specific embodiment described herein is only used to explain this reality With novel, it is not used to limit the utility model.

The load retainer of the utility model has the holding frame body of annular and is mounted on the holding frame body The preload piece and gap mainlining member of elasticity, gap mainlining member, preload piece are multiple, week of the gap mainlining member along holding frame body To the inner ring surface or outer ring surface for keeping frame body is arranged in a row, the outer peripheral surface of frame body is being kept to offer in retainer master Multiple limit holes of the circumferentially-spaced setting of body, limit hole are worn along the axially extending of frame body is kept for rolling columnar load It crosses and accommodates, the inner wall of each limit hole is fixed at least one preload piece, and the inner wall of free end towards the opposite side of the preload piece prolongs It stretches, for after load is assembled in limit hole, circumferentially upper Elastic pusher to be located at the load in limit hole.Preload piece is unified certainly (such as in the clockwise direction, the same side inner wall of each limit hole in the rotation direction for keeping frame body extends towards opposite side inner wall Extend from upstream towards downstream).Here, " upstream " " downstream " refers to that two be located on rotation path in rotation direction are opposite Orientation, in rotation direction, the circumferential moving direction of from " upstream " to " downstream " is consistent with rotation direction.

After load retainer is assembled in bearing, load retainer is located at relatively turnable inner ring and outer ring on bearing Between, and load retainer and rolled by gap mainlining member in inner ring or outer ring back face and guarantee reliable limit with inner ring or outer ring Position precision, no longer there is a phenomenon where random plays for load retainer.Meanwhile be assemblied in load retainer in roller load by The elastic pre-stress of preload piece, specifically, the roller above bearing load not by outer ring pressure and in upstream preload piece Without roll or slightly roll these rollers load is connected in the downstream inner wall of limit hole under elastic pre-stress effect Be close to limit hole downstream inner wall and by circumferential constraint, in absolute axial parastate；And it is located at the rolling below bearing Column load is consistent with the rotation direction of outer ring by rolling occurs under the extruding force of inner ring and outer ring simultaneously；When the roller of top When load is moved to below bearing with load retainer, roller load is made to pre-tighten by the extruding force of inner ring and outer ring simultaneously Part is compressed, and roller load is then detached from the downstream inner wall of limit hole, is no longer influenced by circumferential constraint and can roll, due to It is in accurate axial pretightening state before loading the downstream inner wall for being detached from limit hole in the roller, therefore in subsequent rolling process In can still keep higher axial precision.

It mainly include in ring for keeping the load retainer 30 of the high load depth of parallelism in the present embodiment refering to Fig. 2~5 The preload piece 32 and gap mainlining member 33 of the holding frame body 31 of shape and the elasticity being mounted on holding frame body 31, gap are protected Gripping member 33 be it is multiple, along keep frame body 31 circumferential array be arranged in keep frame body 31 inner ring surface or outer ring surface, protect After holding between the inner ring 10 being installed in bearing of frame body 31 and outer ring 20, the gap mainlining member 33 of circumferential array can be passed through High-precision gap is kept with the inner ring of bearing or outer ring, and does not influence to keep circumferentially rotating for frame body 31.Here it is possible to be Ball or roller.

In conjunction with shown in Fig. 5 and Fig. 6, specifically, keeps the outer peripheral surface of frame body 31 to offer and keeping frame body 31 circumferential Upper spaced multiple limit holes 312, limit hole 312 is along the axially extending of frame body 31 is kept, for rolling columnar load 40 pass through and accommodate, and the inner wall of each limit hole 312 is fixed at least one for the pre- of circumferentially upper Elastic pusher load 40 Tight part 32.

It should be noted that the width (i.e. along the size for keeping frame body 31 circumferential) of limit hole 312 is slightly larger than load 40 Radial dimension, the length direction of limit hole 312 is identical as the axial direction of frame body 31 is kept, and the depth direction of limit hole 312 is For the radial direction for keeping frame body 31, each limit hole 312 include opposite first in the rotation direction for keeping frame body 31 in Wall and the second inner wall, preload piece 32 is set to the first inner wall of each limit hole 312 and free end extends towards the second inner wall, limit First inner wall in hole 312 is parallel to each other with the second inner wall, parallel with the depth direction of limit hole 312, i.e., perpendicular to limit hole 312 width direction can make load 40, by the completely vertical pre- police strength of circumferential direction, realize reliable limit in limit hole 312 Position, the first inner wall of each limit hole 312 are respectively positioned on the upstream/downstream of the second inner wall.

It keeps in 31 circumferential direction of frame body a load being installed in each limit hole 312 it is preferred that limit hole 312 is evenly arranged on 40, load 40 is consistent with the quantity of limit hole 312 in load retainer 30.Load 40 in each limit hole 312 simultaneously by The elastic pushing pressure in the same direction at least two from preload piece 32.For example, it may be a preload piece 32 pushes load simultaneously At least two different parts on 40 length direction are also possible to preload piece there are two the inner wall fixations of each limit hole 312 32, two different parts that two preload pieces 32 in each limit hole 312 are respectively used on the length direction of load 40 push away Pressure load 40.

The inner ring surface of frame body 31 or outer ring surface is kept to offer the groove 311 being embedded for gap mainlining member 33, gap is protected Gripping member 33 is rollably set in groove 311 and diameter is greater than 311 depth of groove, so that groove is stretched out in 33 part of gap mainlining member Outside 311.Here, in a ring, the close-packed arrays in the circumferential direction of groove 311 of gap mainlining member 33, the groove 311 is at least for groove 311 It is two, two grooves 311 are spaced setting in the axial direction for keeping frame body 31, keep frame body 31 rotating to guarantee Longitudinal balance can be kept in the process, and preferably two grooves 311 are provided with the both ends in the axial direction for keeping frame body 31, convenient for limit The assembly opened up with gap mainlining member 33 in position hole 312.

As one of embodiment, keeping frame body 31 includes two intervals and the cricoid positioning ring 3a of face setting And more attachment beam 3b being connected between two positioning ring 3a, groove 311 are provided with the inner ring surface or outer ring of positioning ring 3a Face；Limit hole 312 is formed between two adjacent attachment beam 3b, is fixed with a preload piece 32 on every attachment beam 3b.

Further, the preload piece 32 of the present embodiment is elastic slice, keeps opening on the outer surface of the attachment beam 3b of frame body 31 Locating slot P equipped with two circle intervals, one end of preload piece 32 wound on the surface attachment beam 3b and are embedded in locating slot P, pre-tighten The free end of part 32 is stretched out towards 312 opposite side inner wall of limit hole, in this way, limit hole 312 can also be made narrower, limit hole 312 It can also be designed more, more loads 40 can also share more extruding forces, diameter of the limit hole 312 closer to load 40 To size, can also be more conducive to improve the axial depth of parallelism.In other embodiments, preload piece 32 can also be using pressure spring, torsion Spring etc. replaces.

Meanwhile the utility model also provides a kind of bearing with above-mentioned load retainer 30, including inner ring 10, outer Circle 20, load retainer 30 and load 40, load 40 are rollably set between inner ring 10 and outer ring 20 to be multiple, and load is protected It holds frame 30 to be set between inner ring 10 and outer ring 20, gap mainlining member 33, which is rollably arranged in, to be kept outside frame body 31 and inner ring 10 Between anchor ring, or keep between frame body 31 and 20 inner ring surface of outer ring；Load 40 is contained in limit hole 312, and in preload piece Elasticity, which abuts, under the action of 32 keeps frame body 31.

Keep the distance between inner ring surface and outer ring surface of frame body 31 that the wall thickness of frame body 31 is kept to be less than load 40, Load 40 is located in limit hole 312, and can roll in 10 outer surface of inner ring and 20 inner surface of outer ring.

As shown in figures 2-6, the situation for keeping 31 inner ring surface of frame body, groove are rollably set for gap mainlining member 33 311 are provided with the inner ring surface for keeping frame body 31, and 33 compartment of terrain of gap mainlining member is arranged in groove 311, the both ends of inner ring 10 It is respectively equipped with fillet surface 10S, after load retainer 30 is assembled on the inner ring 10 of bearing, gap mainlining member 33 is located at fillet surface Between 10S and groove 311.After load retainer 30 is installed on inner ring 10, load 40 is installed to each limit hole 312 It is interior, so that the second inner walls that each load 40 is connected to limit hole 312 by 32 elasticity of preload piece, then outer ring 20 is set in negative It carries outside retainer 30, carrying out limit to the axial direction of bearing can be completed assembling.

As a kind of limit method of bearing face, bearing may also include retainer ring 50, retaining ring 60, one end of outer ring 20 Inner surface offers the securing groove 200 for 50 clamping of retainer ring.When outer ring 20 be set in load retainer 30 it is outer after, first by retaining ring 60 It is put into outer ring 20, then retainer ring 50 is caught in securing groove 200, frame body 31 is kept to be stopped in the axial direction by retaining ring 60 and realized axial Limit.

Below in bearing pressurized process, the operation conditions for loading 40 is analyzed, here, not with the inner ring 10 of bearing Turn, outer ring 20 is illustrated for rotating clockwise.It should be noted that " inner ring 10 does not turn " here refers to relative to outer The motion conditions of circle 20 are also possible to outer ring 20 and do not turn, inner ring 10 is rotated in actual moving process.

The heavy loaded bearing that the high-precision axial line retainer of the utility model is loaded especially suitable for wire-shaped contact is such as schemed Shown in 5, inner ring 10 is applied pressure at right angle to compression face (such as ground) by downward carrying pressure, the outer ring 20 of bearing, meanwhile, Outer ring 20 rotates clockwise.In the process, inner ring 10 may be considered the micro- eccentric state presented towards compression face, be located at axis The load 40 above axial line X is held not by the longitudinal pressure of inner ring 10, carrying pressure, which is mainly concentrated, to be applied to positioned at BEARING SHAFT In load 40 below line X, the load 40 below bearing axis X is same clockwise under the extruding of inner ring 10, outer ring 20 Step rolls.The elasticity of roller load 40 not by 20 pressure of outer ring and in the clockwise direction above bearing axis X pre-tightens Without roll or slightly roll these rollings are connected in the downstream inner wall (the second inner wall) of limit hole 312 under power effect Column load 40 be close to limit hole 32 downstream inner wall and by circumferential constraint, in absolute axial parastate；When top After roller load 40 moves to below bearing axis X with load retainer 30, the load 40 is simultaneously by inner ring 10 and outer ring 20 extruding force and compress preload piece 32, then be detached from the downstream inner wall of limit hole 32, be no longer influenced by circumferential constraint and can be with It rolling, the extruding force which is subject to is gradually increased and starts in 20 inner surface of outer ring with 20 synchronous rolling of outer ring, by It is in accurate axial pretightening state before the downstream inner wall in the load 40 disengaging limit hole 32, therefore is scrolled through subsequent Higher axial precision can still be kept in journey, will not occur circuit oscillation, load 40 from bearing axis X clockwise movement to During bottom, the extruding force being subject to is gradually increased, and load 40 moves to the other side bearing axis X (as schemed from below 5 left side) during, the extruding force being subject to is gradually reduced, after load 40 moves to above bearing axis X, extruding force Become 0, preload piece 32 restore deformation and again by load 40 be urged to the downstream inner wall of limit hole 32 and with keeping frame body 31 Rotation.

As is seen in figs 7-10, the situation for keeping 31 outer ring surface of frame body, ditch are rollably set for gap mainlining member 33 Slot 311 ' is provided with the outer ring surface for keeping frame body 31, and 33 compartment of terrain of gap mainlining member is arranged in groove 311 ', first by outer ring 20 are set in 33 outside of holding frame body 31 and gap mainlining member, then load 40 is installed in each limit hole 312, so that respectively A load 40 is connected to the second inner wall of limit hole 312 by 32 elasticity of preload piece, when load retainer 30 is assembled into the outer of bearing After on circle 20, gap mainlining member 33 is between outer ring 20 and groove 311 '.After load retainer 30 is installed on outer ring 20, Inner ring 10 is plugged in load retainer 30 again, carrying out limit to the axial direction of bearing can be completed assembling.

Unlike the embodiment of former bearing, present embodiment can be opened in the outer surface of one end of inner ring 10 Equipped with the securing groove 100 for 50 clamping of retainer ring.After inner ring 10 is plugged in load retainer 30, first retaining ring 60 is set in interior It encloses on 10, then retainer ring 50 is caught in securing groove 100, frame body 31 is kept to be stopped in the axial direction by retaining ring 60 and realize axial limit Position.

The above is only the specific embodiment of the application, it is noted that for the ordinary skill people of the art For member, under the premise of not departing from the application principle, several improvements and modifications can also be made, these improvements and modifications are also answered It is considered as the protection scope of the application.

Claims

1. a kind of for keeping the load retainer of the high load depth of parallelism, which is characterized in that the holding frame body including annular (31) and be mounted on it is described holding frame body (31) on elasticity preload piece (32) and gap mainlining member (33), the gap Holder (33) be it is multiple, along it is described keep frame body (31) circumferential array be arranged in it is described keep frame body (31) it is interior Anchor ring or outer ring surface；The outer peripheral surface for keeping frame body (31), which is offered, to be set the holding frame body (31) is circumferentially-spaced The multiple limit holes (312) set, the limit hole (312) keeps the axially extending of frame body (31) along described, for roller shape Load (40) pass through and accommodate, the inner wall of each limit hole (312) is fixed at least one for circumferentially upper elasticity Push the preload piece (32) of the load (40).

2. according to claim 1 for keeping the load retainer of the high load depth of parallelism, which is characterized in that the holding The inner ring surface or outer ring surface of frame body (31) offer the groove (311) being embedded for the gap mainlining member (33), the gap Holder (33) is rollably set in the groove (311) and diameter is greater than the groove (311) depth.

3. according to claim 2 for keeping the load retainer of the high load depth of parallelism, which is characterized in that the groove (311) in a ring, gap mainlining member (33) close-packed arrays in the circumferential direction of the groove (311).

4. according to claim 3 for keeping the load retainer of the high load depth of parallelism, which is characterized in that the groove (311) at least two, two grooves (311) are spaced setting in the axial direction for keeping frame body (31).

5. according to claim 4 for keeping the load retainer of the high load depth of parallelism, which is characterized in that the holding Frame body (31) include two intervals and face cricoid positioning ring (3a) is set and be connected to two positioning rings (3a) it Between more attachment beams (3b), the groove (311) is provided with the inner ring surface or outer ring surface of the positioning ring (3a)；Adjacent two Formed between attachment beam described in root (3b) limit hole (312), be fixed on the every attachment beam (3b) one it is described pre- Tight part (32).

6. according to claim 1 for keeping the load retainer of the high load depth of parallelism, which is characterized in that each described Two preloads there are two the inner wall of limit hole (312) is fixed the preload piece (32), in each limit hole (312) Two different parts that part (32) is respectively used in the axial direction for keeping frame body (31) push the load (40).

7. according to claim 1 for keeping the load retainer of the high load depth of parallelism, which is characterized in that the gap Holder (33) is ball or roller.

8. -7 any load retainer for being used to keep the high load depth of parallelism according to claim 1, which is characterized in that every A limit hole (312) includes in the first inner wall and second opposite in the rotation direction for keeping frame body (31) Wall, the preload piece (32) is set to first inner wall of each limit hole (312) and free end is towards in described second Wall extends.

9. according to claim 8 for keeping the load retainer of the high load depth of parallelism, which is characterized in that each described First inner wall of limit hole (312) is parallel to each other with second inner wall.

10. a kind of bearing, which is characterized in that including inner ring (10), outer ring (20), load (40) and any institute of claim 1-9 State for keeping the load retainer of the high load depth of parallelism, the load (40) be it is multiple, rollably set on the inner ring (10) between the outer ring (20)；It is described for keep the high load depth of parallelism load retainer be set to the inner ring (10) and Between the outer ring (20), the holding frame body (31) and the inner ring is rollably arranged in the gap mainlining member (33) (10) between outer ring surface or between the holding frame body (31) and the outer ring (20) inner ring surface；The load (40) accommodates Elasticity abuts the holding frame body (31) in the limit hole (312), and under the action of the preload piece (32).