CN213206318U

CN213206318U - Shaft connecting bearing with three-row rolling body structure

Info

Publication number: CN213206318U
Application number: CN202021050374.1U
Authority: CN
Inventors: 徐丽
Original assignee: Shanghai C&U Group Co Ltd; C&U Co Ltd
Current assignee: Shanghai C&U Group Co Ltd; C&U Co Ltd
Priority date: 2020-06-09
Filing date: 2020-06-09
Publication date: 2021-05-14
Anticipated expiration: 2030-06-09

Abstract

The utility model provides a three rows of rolling element structure axle even bearing belongs to the bearing field for the car, including dabber, outer lane, first cylindricality roller, roller holder one, steel ball holder, second cylindricality roller, roller holder two and sealing member, first cylindricality bearing roller is unanimous with second cylindricality roller structure, but the length of first cylindricality roller is longer than the length of second cylindricality roller, and the one end at first cylindricality roller place is for being close to in the one end of belt pulley. The utility model discloses a both ends are three row formula structures of cylindricality roller to prolonged the size of the cylindricality roller that is close to the belt pulley end, improved the bearing and had the load-carrying capacity of belt pulley end, thereby satisfy heavy automobile to the axle and connect the user demand of bearing, prolong the life of bearing as far as possible.

Description

Shaft connecting bearing with three-row rolling body structure

Technical Field

The utility model relates to a bearing field especially relates to a supply fan bracket to use, have three rows of rolling element structure's bearing.

Background

The existing fan bracket bearing unit is generally two rows of rolling elements or three rows of rolling elements, for example, a three-row rolling element shaft coupling bearing for an automobile engine water pump provided by CN200820058683.6, wherein the middle end is a steel ball, and the two ends are cylindrical rollers with the same size. However, in the actual working process, the load on the shaft connecting bearing for the fan bracket of the engine of the heavy-duty car is larger particularly near the roller end of the belt pulley when the shaft connecting bearing works, so that the service life of the shaft connecting bearing for the fan bracket of the engine of the car matched with the main machine is high. The service life of the shaft connecting bearing for the existing heavy-duty car engine fan bracket is difficult to meet the requirement.

Based on this, the present application is proposed.

Disclosure of Invention

The utility model provides a not enough to prior art, the utility model provides a three rows of rolling element structure coupling bearing solves the problem that current automobile engine fan bracket can't satisfy heavy-duty car user demand with coupling bearing among the prior art.

In order to achieve the above object, the utility model discloses three rows of rolling element structure coupling bearings, including dabber, outer lane, first cylindricality roller, roller holder one, steel ball holder, second cylindricality roller, roller holder two and sealing member, first cylindricality roller, bearing steel ball, second cylindricality roller set up at the interval in proper order, are provided with corresponding channel and raceway in outer lane and spindle. The first cylindrical bearing roller and the second cylindrical bearing roller are consistent in structure, but the length of the first cylindrical bearing roller is longer than that of the second cylindrical bearing roller, and one end of the first cylindrical bearing roller is close to one end of the belt pulley.

The structure can directly arrange a new structure under the condition of limited space without changing the size of the bearing, and is convenient to set and realize. In addition, the bearing capacity of the bearing is improved due to the design of the three rows of rolling bodies, the spatial arrangement and the service life of the bearing are optimized, and the bearing can meet the use requirement, so that the use requirement of the bearing with higher load capacity requirement at the belt wheel end is met.

For making the utility model discloses the bearing is even to the axle keeps stable in structure in the use, the dabber with be equipped with the channel that is used for assembling the steel ball on the outer lane, the channel is four point contact structure, its contact angle is 25.

The utility model discloses further set up as follows: the length of first cylindricality roller is 4:3 with the length of second cylindricality roller's ratio, through this proportion restriction, can prevent to lead to the roller both ends to produce the warpage phenomenon more easily in the use because of first cylindricality roller length overlength leads to the bearing, leads to the atress inhomogeneous, leads to the bearing temperature rise big very easily, generate heat seriously, lubricate badly, and the bearing produces the emergence of the condition such as fatigue spalling in advance at last, prolongs the utility model discloses the life of axle coupling bearing.

For keeping balance, simplify the structure, the utility model discloses further set up as follows: the centers of the first roller retainer and the second roller retainer are coaxially arranged.

For keeping the distance between roller and the steel ball, keep bearing overall structure's stability and balance, the utility model discloses further set up as follows: the raceway where the first cylindrical roller and the second cylindrical roller are located is connected with the channel where the steel ball is located through an arc-shaped groove on the outer ring side wall, and the first cylindrical roller and the second cylindrical roller are arranged at intervals with the steel ball through the arc-shaped groove. The first roller retainer and the second roller retainer are both positioned in the arc-shaped groove. The structure adopts the arc-shaped groove as the transition between the raceway and the channel, thereby being convenient for the assembly of the steel ball and being beneficial to keeping the safe distance between the roller and the side wall of the outer ring of the bearing.

The utility model discloses further set up as follows: the two ends of the arc-shaped groove have height difference, so that the arc-shaped groove can adapt to the sizes of the steel balls and the rollers, the overall structure is more reasonable, and the roller paths and the grooves can be effectively separated and respectively and independently arranged to ensure the normal operation of the bearing in the working process.

The utility model discloses further set up as follows: and included angles of 65 degrees and 85 degrees are respectively formed between the two ends of the arc-shaped groove and the plane where the side wall of the outer ring is located, so that the distance between the arc-shaped groove and the roller or the roller retainer is kept as far as possible, and the contact is avoided.

The utility model has the advantages as follows: the utility model provides a three rows formula structure, its both ends all set up the cylindricality roller, so bearing capacity will be bigger than one row of cylindricality roller bearing capacity of current one end, simultaneously, owing to prolonged the size of the cylindricality roller that is close to the pulley end, thereby the bearing capacity of extension bearing at the pulley end, so that it can adapt to the bearing capacity requirement of heavy automobile engine fan to the axle even bearing, thereby prolong its life in heavy automobile engine fan, satisfy the user demand of heavy automobile to the axle even bearing.

Drawings

Fig. 1 is an overall schematic diagram of an embodiment of the present invention.

Fig. 2 is a schematic illustration of the embodiment of the present invention.

Fig. 3 is a schematic view of an arc-shaped groove according to an embodiment of the present invention.

Reference numerals: 1-mandrel, 2-outer ring, 3-first cylindrical roller, 4-roller retainer I, 5-steel ball, 6-steel ball retainer, 7-second cylindrical roller, 8-roller retainer II, 9-sealing element, 201-arc groove.

Detailed Description

The utility model provides a three rows of rolling element structure coupling bearings, including dabber 1, outer lane 2, first cylindricality roller 3, roller holder 4, steel ball 5, steel ball holder 6, second cylindricality roller 7, two 8 and sealing member 9 of roller holder, be provided with corresponding channel and raceway at outer lane 2 and dabber 1, the channel is four point contact structure, and for the contact of the minimize steel ball 5 and outer lane 2, inner circle when improving structural stability, this embodiment sets up the contact angle into 25. The first cylindrical roller 3, the bearing steel ball 5 and the second cylindrical roller 7 are sequentially arranged on the corresponding roller paths or the corresponding channels at intervals through a roller retainer I4, a steel ball retainer 6 and a roller retainer II 8 respectively, and one end of the first cylindrical roller 3 is close to one end of the belt pulley.

In this embodiment, the first cylindrical bearing roller and the second cylindrical roller 7 have the same structure, but the length of the first cylindrical roller 3 is longer than that of the second cylindrical roller 7. Therefore, the bearing capacity of the axle connecting bearing at the end where the first cylindrical roller 3 is located is increased, the higher bearing requirement of the heavy-duty automobile at the end is met, and the service life of the axle connecting bearing in the heavy-duty automobile is prolonged. The ratio of the length of the first cylindrical roller 3 to the length of the second cylindrical roller 7 is 4:3, so that the situation that the two ends of the roller are easy to warp in the using process of the bearing due to the fact that the length of the first cylindrical roller 3 is too long, stress is uneven, bearing temperature rise is high, heat is serious, lubrication is poor, and finally the bearing is prone to fatigue peeling in advance and the like can be prevented.

It should be noted that, in the present embodiment, the centers of the first roller cage 4 and the second roller cage 8 are coaxially arranged.

In one embodiment, the raceways where the first cylindrical roller 3 and the second cylindrical roller 7 are located and the channel where the steel ball 5 is located are connected to the sidewall of the outer ring 2 through an arc-shaped groove 201, a height difference exists between two ends of the arc-shaped groove 201, and an included angle of 65 ° and 85 ° is formed between two ends of the arc-shaped groove 201 and a plane where the sidewall of the outer ring 2 is located, respectively. The first cylindrical roller 3 and the second cylindrical roller 7 are arranged at intervals with the steel ball 5 through the arc-shaped groove 201, and the roller retainer I4 and the roller retainer II 8 are both positioned in the arc-shaped groove 201. At the same time, however, the arc-shaped groove 201 and the roller or the roller retainer are required to keep the distance as much as possible to avoid contact, so as to prolong the service life of the shaft coupling bearing.

To sum up, the utility model provides a design of three rows of rolling elements replaces a rolling element as the main source who undertakes radial load through adopting two rows of rolling elements, and the extension is wherein close to the size of the cylindricality roller of the one end of band pulley simultaneously, effectively increases the bearing capacity of roller, not only can eliminate the drawback of the above-mentioned of above-mentioned, can improve the bearing capacity and the life-span of bearing moreover. Furthermore, the novel shaft connecting bearing provided by the utility model can also meet the load requirement of the belt wheel end while avoiding the defect of the steel ball 5 at the impeller end.

Claims

1. Three rows of rolling element structure axle bearings, including dabber, outer lane, first cylindricality roller, roller holder one, steel ball holder, second cylindricality roller, roller holder two and sealing member, its characterized in that: the first cylindrical bearing roller and the second cylindrical bearing roller are consistent in structure, but the length of the first cylindrical bearing roller is longer than that of the second cylindrical bearing roller, and one end of the first cylindrical bearing roller is close to one end of the belt pulley.

2. The three-row rolling element structure shaft coupling bearing according to claim 1, wherein: the mandrel and the outer ring are provided with channels for assembling steel balls, the channels are of a four-point contact structure, and the contact angle of the channels is 25 degrees.

3. The three-row rolling element structure shaft coupling bearing as claimed in claim 1 or 2, wherein: the ratio of the length of the first cylindrical roller to the length of the second cylindrical roller is 4: 3.

4. A three row rolling element structure shaft coupling bearing as claimed in claim 3, wherein: the centers of the first roller retainer and the second roller retainer are coaxially arranged.

5. The three-row rolling element structure shaft coupling bearing according to claim 4, wherein: the raceway where the first cylindrical roller and the second cylindrical roller are located is connected with the channel where the steel ball is located through an arc-shaped groove on the outer ring side wall, and the first cylindrical roller and the second cylindrical roller are arranged at intervals with the steel ball through the arc-shaped groove.

6. The three-row rolling element structure shaft coupling bearing according to claim 5, wherein: the first roller retainer and the second roller retainer are both positioned in the arc-shaped groove.

7. The three-row rolling element structure shaft coupling bearing according to claim 5, wherein: and the two ends of the arc-shaped groove have height difference.

8. The three-row rolling element structure shaft coupling bearing according to claim 7, wherein: and included angles of 65 degrees and 85 degrees are respectively formed between the two ends of the arc-shaped groove and the plane where the side wall of the outer ring is located.