CN112145552A

CN112145552A - Release bearing with lubricating structure and lubricating method thereof

Info

Publication number: CN112145552A
Application number: CN202011024327.4A
Authority: CN
Inventors: 李晨浩; 严鉴铂; 刘义; 田沛; 李建峰
Original assignee: Xian Fast Auto Drive Co Ltd
Current assignee: Xian Fast Auto Drive Co Ltd
Priority date: 2020-09-25
Filing date: 2020-09-25
Publication date: 2020-12-29
Anticipated expiration: 2040-09-25
Also published as: CN112145552B

Abstract

The invention discloses a release bearing with a lubricating structure and a lubricating method thereof, the structure is provided with a guide thread, and the storage space of lubricating grease is increased to a certain extent while the lubricating grease can be ensured to be uniformly filled in an oil storage tank of the release bearing, so that the state of the lubricating grease in the oil storage tank is good and uniformly distributed, the lubricating condition of the release bearing is effectively improved, and the service life is greatly prolonged. And the oil inlet space is enlarged, the oil inlet amount is increased, and the internal lubrication is sufficient. Meanwhile, sealing structures are arranged at two ends of the guide thread, so that the sleeve can guarantee the sealing effect when reciprocating.

Description

Release bearing with lubricating structure and lubricating method thereof

[ technical field ] A method for producing a semiconductor device

The invention belongs to the technical field of bearings, and particularly relates to a release bearing with a lubricating structure and a lubricating method thereof.

[ background of the invention ]

The clutch release bearing matched with the current commercial vehicle mechanical transmission can be divided into a maintenance type release bearing and a maintenance-free type release bearing. The good operation of the clutch ensures that the clutch can be smoothly jointed and is soft in separation, reduces abrasion, and prolongs the service life of the transmission, the clutch and the whole transmission system.

The mechanical transmission of the foreign commercial vehicle is mainly matched with a maintenance-free release bearing. And the domestic is influenced by the working condition environment, and the maintenance type release bearing is matched. Structurally, there are two obvious differences between maintenance-free release bearings and maintenance-type release bearings: a nylon bush is arranged in a maintenance-free type release bearing sleeve, and an oil injection hole is not formed; and the maintenance type release bearing is not provided with a nylon bush and is provided with an oil filling hole. In terms of performance, the maintenance-free release bearing adopts a self-lubricating mode (namely, the nylon bush material is PA46 or PA66, and plastic particles have certain lubricity), so that the maintenance-free release bearing does not need to be manually filled with lubricating grease. And the maintenance type release bearing does not have a nylon bush, and a certain amount of high-temperature-resistant lubricating grease needs to be manually injected through the oil filling hole when the maintenance type release bearing is used. The maintenance-free release bearing has the advantages of good wear resistance (the bushing contains about 33% of glass fiber, the strength of the sleeve is improved), and no maintenance is needed. But the lubricating performance is general, and the influence of bad road conditions is easily received, leads to inside a large amount of dust and impurity entering release bearing, has greatly influenced lubricated effect, arouses faults such as release bearing jamming, abnormal sound. The maintenance type release bearing is more suitable for severe road conditions, has better lubricating performance, but has shorter maintenance period, and brings great inconvenience to drivers.

[ summary of the invention ]

The invention aims to overcome the defects of the prior art and provides a release bearing with a lubricating structure and a lubricating method thereof, so as to solve the problems of poor lubricating effect and short maintenance period of the release bearing in the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:

a release bearing with a lubricating structure comprises a bearing and a sleeve which are adjacently arranged, wherein the sleeve is divided into a first part and a second part along the axial direction of the sleeve, the second part is provided with a guide thread along the circumferential direction of the sleeve, the second part is provided with an oil storage cavity penetrating through the inner surface and the outer surface of the side wall of the second part, and the lower bottom surface of the oil storage cavity is part of the guide thread; an oil seal is sleeved in the bearing;

when the bearing and the sleeve are sleeved on a shaft bearing cover together, a sealing ring is arranged between the second part and the shaft bearing cover, and the sealing ring is arranged on the outer side of the guide thread.

The invention is further improved in that:

preferably, the inner surface of the oil seal is provided with an oil return line.

Preferably, the oil return line is of a spiral structure, and the spiral direction is the same as the rotation direction of the bearing.

Preferably, the oil seal and the bearing are in interference fit, and the oil seal and a shaft bearing cover are in clearance fit.

Preferably, the reservoir is provided in an upper portion of the sleeve.

Preferably, the sleeve is provided with a sealing groove.

Preferably, the sealing ring is an O-ring.

A lubricating method for a release bearing provided with a lubricating structure comprises the steps of injecting lubricating grease into an oil storage cavity, wherein the lubricating grease is distributed on the side wall of a second part along a guide thread;

when the sleeve reciprocates axially along the shaft bearing cover, lubricating grease is coated on the pipe wall of the shaft bearing cover, and the oil seal and the sealing ring play a role in sealing simultaneously.

Preferably, when the bearing rotates, the oil seal is caused to rotate relative to a bearing cap, and the oil seal draws grease from the second portion to the oil seal.

Compared with the prior art, the invention has the following beneficial effects:

the invention discloses a release bearing with a lubricating structure, which is provided with a guide thread, so that the lubricating grease can be uniformly filled in an oil storage tank of the release bearing, and meanwhile, the storage space of the lubricating grease is increased to a certain extent, so that the state of the lubricating grease in the oil storage tank is good and uniformly distributed, the lubricating condition of the release bearing is effectively improved, and the service life is greatly prolonged. And the oil inlet space is enlarged, the oil inlet amount is increased, and the internal lubrication is sufficient. Meanwhile, sealing structures are arranged at two ends of the guide thread, so that the sleeve can guarantee the sealing effect when reciprocating. This product structural design is reasonable, can effectively promote the product life-span, solves jamming, the abnormal sound problem in the product use, promotes the whole quality of derailleur product, and the quick switch-over of new, old product can be realized to the overwhelming majority product among this novel release bearing fungible current maintenance type release bearing. Meanwhile, the novel maintenance release bearing is considered from the structural design, the amount of injected lubricating grease is more accurate, the storage capacity is better, the service life is prolonged to be more than 2 times of that of an original product, and the problems of clamping stagnation and abnormal sound of the release bearing under severe extreme working conditions are solved.

Furthermore, an oil return line is arranged on the inner wall surface of the oil seal, the oil return line is of a spiral structure, and the lubricating grease in the oil seal can be automatically sucked out and filled according to the interference fit of the oil seal and the bearing inner ring and the pumping principle of the oil return line.

The oil seal and the bearing are in interference fit, so that the bearing can drive the oil seal to rotate when rotating, and the effect of automatically adsorbing grease is achieved.

Further, the oil storage cavity is arranged at the upper part of the sleeve structure, so that the poured grease can flow into the whole guide thread under the action of gravity.

Furthermore, the sleeve is provided with a sealing groove, so that the sealing ring can be conveniently placed.

Furthermore, the O-shaped ring groove is convenient to process, the O-shaped ring is easy to assemble and operate, lubricating grease can be effectively prevented from flowing away from the gap between the sleeve and the shaft bearing cover during working, the problems of poor lubrication or no lubrication and the like are avoided, external dust and impurities are prevented from entering in a large quantity under severe working conditions, and a good working environment is provided for the release bearing.

The invention also discloses a method for lubricating the release bearing with the lubricating structure, wherein lubricating grease is injected into the oil storage cavity, and the lubricating grease is arranged on the side wall of the second part along the guide thread under the action of gravity. Meanwhile, when the sleeve reciprocates axially along the bearing cover, the sealing structures on two sides of the sleeve can play a sealing role.

[ description of the drawings ]

FIG. 1 is a schematic view of a release bearing and bearing cap arrangement according to the present invention;

FIG. 2 is a schematic view of the oil seal structure of the present invention, wherein (a) is a sectional view; (b) the figure is a perspective view.

FIG. 3 is a schematic cross-sectional view of a release bearing reservoir;

FIG. 4 is a cross-sectional view of a section B-B of the release bearing;

FIG. 5 is a cross-sectional view of a section A-A of the release bearing;

wherein: 1-a shaft bearing cap; 2-sealing ring; 3-guiding screw thread; 4-an oil storage tank; 5-oil sealing; 6-oil storage chamber; 7-a bearing; 8-a sleeve; 9-a sealing groove; 81-first part; 82-a second portion; 51-oil return line.

[ detailed description ] embodiments

The invention is described in further detail below with reference to the accompanying drawings:

in the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly and encompass, for example, both fixed and removable connections; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1, 3, 4 and 5, the invention discloses a release bearing with a lubricating structure and a lubricating method thereof, the release bearing is maintained, an old oil hole is cancelled and is updated to an oil storage cavity 6 with a certain volume, and the problem that the injected lubricating grease cannot be quantified during assembly is effectively solved, and the phenomenon that the lubricating grease overflows or is not lubricated enough can not be quantified. If the lubricating grease is coated too much, a slight oil leakage phenomenon can be caused; too little lubrication can cause seizure and abnormal sound of the release bearing.

The release bearing disclosed by the invention comprises a bearing 7 and a sleeve 8, wherein the bearing 7 and the sleeve 8 are sleeved outside a shaft bearing 1. The bearing 7 and the sleeve 8 are arranged adjacently.

Referring to fig. 2, the sleeve 8 is divided into a first portion 81 and a second portion 82 along the axial direction thereof, the first portion 81 is close to the bearing 7, the cylindrical surface of the inner wall surface of the first portion 81, and the inner wall surface of the second portion 82 is provided with a guide thread 3, and the guide thread 3 forms a continuous oil storage groove 4 in one turn on the inner wall surface of the second portion 82. The oil storage chamber 6 is opened on the side wall of the second part 82, and the inner bottom surface of the oil storage chamber 6 is communicated with the oil storage groove 4, so that the main part of the inner wall surface of the second part 82 is the guide screw thread 3, but a part of the inner wall surface is communicated with the inner bottom surface of the oil storage chamber 6, and the lubricating grease injected into the oil storage chamber 6 can flow into the guide screw thread 3 along the long arc-shaped oil leakage groove on the inner surface of the oil storage chamber 6.

Be provided with sealing washer 2 at the 3 outside ends of lead screw, between the internal face of sleeve 8 and bearing cap 1, preferably, seted up seal groove 9 on the sleeve 8, sealing washer 2 sets up in seal groove 9, sealing washer 2 preferred is O type circle.

Be provided with oil blanket 5 between bearing 7 and the bearing cap 1, the inside wall of oil blanket 5 and bearing 7 is interference fit, be clearance fit between oil blanket 5 and the bearing cap 1, be provided with oil return line 51 on the inside wall of oil blanket 5, oil return line 51 is thread structure, thread structure's direction of rotation is the same with the direction of rotation of bearing 7, make oil blanket 5 when rotatory along with bearing 7, the grease of following the infiltration of second portion 82 can be followed the direction of rotation and removed to first portion 81 from second portion 82, and then between lubricated bearing 7 and the bearing cap 1.

The working principle of the invention is as follows:

(1) after the release bearing is assembled, lubricating grease is injected into an oil storage cavity 6 of the release bearing, then the lubricating grease uniformly surrounds the whole oil storage tank 4 along the oil storage tank guide thread 3 (playing a guiding role), the filling state of the lubricating grease in the oil storage tank 4 is observed, and the lubricating grease can be stopped from being injected when the lubricating grease is gradually filled;

(2) when the release bearing starts to operate, the sleeve 8 performs an axial reciprocating motion along a shaft bearing cap 1. When the release bearing moves from the end A to the end B, the lubricating grease in the oil storage tank 4 is uniformly coated on the pipe wall of the shaft bearing cover 1, meanwhile, the matching gap between the release bearing and the shaft bearing cover 1 is also filled with the lubricating grease, and the release bearing continues to move along the shaft bearing cover 1 to reach the maximum release stroke. When the grease seal 5 at the end A is filled with the grease, the grease seal 5 is self-sucked with the grease; in a similar way, after the maximum separation stroke is reached, the separation bearing axially moves from the end B to the end A. When the grease is applied to the sealing ring 2, the sealing ring 2 blocks the grease, thereby preventing the grease from being lost. The guide thread increases the amount of lubricating grease in the fit clearance, and the lubricating effect is ensured;

3) when the oil seal 5 is installed, the oil seal is in interference fit with the inner ring of the bearing 7, namely, the oil seal 5 and the inner ring of the bearing 7 rotate in the same direction. When the release bearing works, the bearing 7 always keeps a rotating state, the oil seal 5 rotates along with the bearing, and a certain pressure difference is formed between the oil return line 51 and the oil gauge, so that lubricating grease is gradually sucked out from the inner side between the oil seal 5 and the sleeve 8, and the function of automatically filling grease is achieved.

4) During the running process of the vehicle, foreign matters such as dust and impurities can enter the interior of the release bearing through the gap. The sealing ring 2 and the oil seal 5 of the maintenance release bearing play a role in sealing, dust and impurities are effectively prevented from entering the interior of the maintenance release bearing, the effective service life of lubricating grease is prolonged, the clamping stagnation faults of the release bearing are effectively reduced, and the maintenance period of a user is also prolonged.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The release bearing provided with the lubricating structure is characterized by comprising a bearing (7) and a sleeve (8) which are adjacently arranged, wherein the sleeve (8) is divided into a first part (81) and a second part (82) along the axial direction of the sleeve, the second part (82) is provided with a guide thread (3) along the circumferential direction of the sleeve (8), the second part (82) is provided with an oil storage cavity (6) penetrating through the inner surface and the outer surface of the side wall of the second part, and the lower bottom surface of the oil storage cavity (6) is provided with a part of the guide thread (3); an oil seal (5) is sleeved in the bearing (7);

when the bearing (7) and the sleeve (8) are sleeved on the shaft bearing cover (1) together, a sealing ring (2) is arranged between the second part (82) and the shaft bearing cover (1), and the sealing ring (2) is arranged on the outer side of the guide thread (3).

2. Release bearing provided with a lubricating structure, according to claim 1, characterized in that the inner surface of the oil seal (5) is provided with oil return lines (51).

3. A release bearing provided with a lubricating structure, according to claim 2, characterized in that the oil return line (51) is of a spiral structure, the spiral direction being the same as the direction of rotation of the bearing (7).

4. A release bearing provided with a lubricating structure, as claimed in claim 1, characterized in that the oil seal (5) and the bearing (7) are in interference fit, and the oil seal (5) and a shaft bearing cover (1) are in clearance fit.

5. A release bearing provided with a lubricating structure, as claimed in claim 1, wherein the oil reservoir (6) is provided in an upper portion of the sleeve (8).

6. The release bearing provided with the lubricating structure according to claim 1, wherein the sleeve (8) is provided with a sealing groove (9).

7. A release bearing provided with a lubricating structure, according to claim 1, characterized in that the sealing ring (2) is an O-ring.

8. A method of lubricating a release bearing provided with a lubricating structure, characterized in that grease is injected into an oil reservoir (6), which is distributed along the guide thread (3) on the side wall of the second portion (8);

when the sleeve (8) performs axial reciprocating motion along the shaft bearing cover (1), lubricating grease is smeared on the pipe wall of the shaft bearing cover (1), and the oil seal (5) and the sealing ring (2) play a role in sealing simultaneously.

9. A method of lubricating a throwaway bearing provided with a lubricating structure, as claimed in claim 7, characterised in that when the bearing (7) is rotated, the oil seal (5) is caused to rotate relative to a shaft bearing cap (1), the oil seal (5) drawing grease from the second portion (82) to the oil seal (5).