High-stability drawn cup needle roller bearing

Abstract

The utility model discloses a high-stability drawn cup needle roller bearing which comprises an outer ring, a retainer and a needle roller, a heat dissipation mechanism is arranged on the retainer and comprises a first heat dissipation fin and a second heat dissipation fin, the first heat dissipation fin is fixedly installed on the outer end face of the retainer, the second heat dissipation fin is fixedly installed on the inner end face of the retainer, and the first heat dissipation fin and the second heat dissipation fin are fixedly installed on the outer end face of the retainer. An oil injection port is formed in the top of the outer ring, an oil inlet is formed in the outer end face of the outer ring, and a runner is arranged between the oil injection port and the oil inlet. The heat dissipation mechanism is arranged on the retainer to dissipate heat of the heat dissipation frame, so that the effect of the heat dissipation frame is improved, and in the rotating process of the retainer, the first heat dissipation fins push lubricating oil on the outer side of the retainer upwards, the second heat dissipation fins push lubricating oil on the inner side of the retainer downwards, and therefore the heat dissipation effect is improved. Therefore, lubricating oil circulates on the inner and outer end faces of the retainer, and the lubricating effect of the lubricating oil is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of needle roller bearings, in particular to a high-stability stamped outer ring needle roller bearing. Background Art

[0002] Needle roller bearings are roller bearings with cylindrical rollers. Relative to their diameter, the rollers are thin and long. Such rollers are called needle rollers. Despite their small cross-section, the bearings still have a high load-bearing capacity. Needle roller bearings are equipped with thin and long rollers, so the radial structure is compact. When the inner diameter size and load capacity are the same as those of other types of bearings, the outer diameter is the smallest, which is particularly suitable for support structures with limited radial installation dimensions.

[0003] During the use of roller bearings, friction between the needle rollers and the cage will generate heat. Overheating of the cage will cause it to deform due to thermal decay, and will aggravate the wear of the bearing, thus affecting the stability of the bearing. After the bearing has been used for a period of time, it needs to be lubricated for maintenance. However, most transmission methods are to disassemble the bearings and then fill them with oil. It is impossible to fill them with oil while they are installed, which affects the maintenance efficiency. Therefore, a high-stability stamped outer ring needle roller bearing is needed to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a high-stability stamped outer ring needle roller bearing, which has the advantages of good heat dissipation effect and convenient lubricating oil filling, and solves the problems in the prior art that the needle roller bearing is prone to overheating and affects the service life of the bearing and is inconvenient to add lubricating oil.

[0005] To achieve the above object, the utility model provides the following technical solutions: a high-stability stamped outer ring needle roller bearing, comprising an outer ring, a cage and a needle roller, wherein a heat dissipation mechanism is provided on the cage;

[0006] The heat dissipation mechanism includes a first heat sink and a second heat sink, the first heat sink is fixedly mounted on the outer end surface of the retaining frame, the second heat sink is fixedly mounted on the inner end surface of the retaining frame, an oil filling port is arranged on the top of the outer ring, an oil inlet is arranged on the outer end surface of the outer ring, and a flow channel is arranged between the oil filling port and the oil inlet.

[0007] As a preferred high-stability stamped outer ring needle roller bearing of the utility model, the first heat sink and the second heat sink are fan-shaped silicon carbide ceramic sheets.

[0008] As a preferred high-stability stamped outer ring needle roller bearing of the utility model, the first heat sink and the second heat sink have a certain spiral angle, and the spiral directions of the first heat sink and the second heat sink are opposite.

[0009] As a preferred high-stability stamped outer ring needle roller bearing of the utility model, the surfaces of the first heat sink and the second heat sink are provided with corrugated columns.

[0010] As a preferred high-stability stamped outer ring needle roller bearing of the utility model, the number of the oil inlets is four, and the four groups of the oil inlets are arranged in an equidistant circular array on the outer end face of the outer ring.

[0011] As a preferred embodiment of a high-stability stamped outer ring needle roller bearing of the utility model, the upper end face and the lower end face of the outer ring are provided with dust covers with interference connection.

[0012] As a preferred embodiment of the high-stability stamped outer ring needle roller bearing of the utility model, a sealing plug is provided near the oil filling port of the dust cover.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] 1. The utility model dissipates heat from the heat sink by arranging a heat dissipation mechanism on the retaining frame, thereby improving the effect of the heat sink. When the retaining frame rotates, the first heat sink pushes the lubricating oil on the outer side of the retaining frame upward, and the second heat sink pushes the lubricating oil on the inner side of the retaining frame downward, thereby realizing the circulation of the lubricating oil on the inner and outer end surfaces of the retaining frame, thereby improving the lubricating effect of the lubricating oil.

[0015] 2. The utility model is provided with an oil filling port, an oil inlet and a flow channel on the outer ring, which is convenient for adding lubricating oil, and dust covers are provided on the upper and lower sides of the outer ring to prevent dust from entering the bearing and prevent the lubricating oil from overflowing, thereby improving the stability of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an exploded view of the utility model;

[0017] Figure 2 It is a schematic diagram of the retainer structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the dust cover structure of the utility model;

[0019] Figure 4 This is a schematic diagram of the outer ring structure of the utility model;

[0020] Figure 5 This is a schematic diagram of the first heat sink structure of the utility model.

[0021] In the figure: 1, outer ring; 101, oil filling port; 102, oil inlet; 103, flow channel; 2, retaining frame; 3, needle roller; 4, heat dissipation mechanism; 401, first heat sink; 402, second heat sink; 403, corrugated column; 5, dust cover; 501, sealing plug. DETAILED DESCRIPTION

[0022] See also Figure 1-Figure 5 A high-stability stamped outer ring needle roller bearing comprises an outer ring 1, a cage 2 and a needle roller 3, wherein the cage 2 is provided with a heat dissipation mechanism 4;

[0023] The heat dissipation mechanism 4 includes a first heat sink 401 and a second heat sink 402. The first heat sink 401 is fixedly installed on the outer end surface of the retaining frame 2, and the second heat sink 402 is fixedly installed on the inner end surface of the retaining frame 2. An oil filling port 101 is provided on the top of the outer ring 1, and an oil inlet 102 is provided on the outer end surface of the outer ring 1. A flow channel 103 is provided between the oil filling port 101 and the oil inlet 102.

[0024] When the bearing is in use, the retaining frame 2 will rotate around the axis under the action of external force, causing friction between the needle roller 3 and the retaining frame 2 to generate heat. The heat generated by the retaining frame 2 is transferred to the lubricating oil through the first heat sink 401 and the second heat sink 402, accelerating the melting of the lubricating oil and improving the lubricating effect of the lubricating oil. During the rotation of the retaining frame 2, the first heat sink 401 pushes the lubricating oil on the outer side of the retaining frame 2 upward, and the second heat sink 402 pushes the lubricating oil on the inner side of the retaining frame 2 downward, thereby realizing the circulation of the lubricating oil on the inner and outer end surfaces of the retaining frame 2, improving the lubricating effect of the lubricating oil, and through the oil filling port 101, the oil inlet 102 and the flow channel 103, it is convenient to install the bearing and replenish the lubricating oil.

[0025] Furthermore, the first heat sink 401 and the second heat sink 402 are fan-shaped silicon carbide ceramic sheets.

[0026] The first heat sink 401 and the second heat sink 402 are used to dissipate heat from the holder 2 , thereby improving the heat dissipation efficiency of the holder 2 . The first heat sink 401 and the second heat sink 402 can heat the lubricating grease to enhance its fluidity.

[0027] Furthermore, the first heat sink 401 and the second heat sink 402 have a certain spiral angle, and the spiral directions of the first heat sink 401 and the second heat sink 402 are opposite.

[0028] During the rotation of the cage 2, the lubricating oil on the outer side of the cage 2 flows upwards, and the lubricating oil on the inner side of the cage 2 flows downwards, so that the lubricating oil circulates on the inner and outer end surfaces of the cage 2, thereby improving the lubricating effect of the lubricating oil.

[0029] Furthermore, corrugated columns 403 are provided on the surfaces of the first heat sink 401 and the second heat sink 402 .

[0030] The contact area between the first heat sink 401 and the second heat sink 402 and the air and the lubricating oil is increased by the corrugated column 403, thereby improving the heat dissipation efficiency, and increasing the resistance to the lubricating oil, further improving the mixing effect of the lubricating oil.

[0031] Furthermore, the number of the oil inlets 102 is four, and the four groups of oil inlets 102 are arranged in an equidistant circular array on the outer end surface of the outer ring 1 .

[0032] The multiple groups of oil inlets 102 improve the uniformity of lubricating oil injection, thereby improving the lubricating effect of the lubricating oil.

[0033] Furthermore, the upper end surface and the lower end surface of the outer ring 1 are provided with dust covers 5 with interference fit.

[0034] The gap between the outer ring 1 and the central axis is blocked by the dust cover 5 to prevent dust from entering the bearing and aggravating the bearing wear. The interference fit installation structure is convenient and secure to install.

[0035] Furthermore, a sealing plug 501 is provided on the dust cover 5 near the oil filling port 101 .

[0036] The oil filling port 101 is plugged with the sealing plug 501 to prevent the lubricating oil from flowing back and to prevent dust from accumulating at the oil filling port 101 to affect the next oil filling.

[0037] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-stability stamped outer ring needle roller bearing, comprising an outer ring (1), a cage (2) and a needle roller (3), characterized in that: The retaining frame (2) is provided with a heat dissipation mechanism (4); The heat dissipation mechanism (4) comprises a first heat sink (401) and a second heat sink (402); the first heat sink (401) is fixedly mounted on the outer end surface of the retaining frame (2); the second heat sink (402) is fixedly mounted on the inner end surface of the retaining frame (2); an oil filling port (101) is arranged at the top of the outer ring (1); an oil inlet (102) is arranged at the outer end surface of the outer ring (1); and a flow channel (103) is arranged between the oil filling port (101) and the oil inlet (102).

2. A high stability drawn cup needle roller bearing according to claim 1, characterized in that: The first heat sink (401) and the second heat sink (402) are fan-shaped silicon carbide ceramic sheets.

3. A high stability drawn cup needle roller bearing according to claim 2, characterized in that: The first heat sink (401) and the second heat sink (402) have a certain spiral angle, and the spiral directions of the first heat sink (401) and the second heat sink (402) are opposite.

4. A high-stability drawn cup needle roller bearing according to claim 3, characterized in that: Corrugated columns (403) are provided on the surfaces of the first heat sink (401) and the second heat sink (402).

5. A high stability drawn cup needle roller bearing according to claim 1, characterized in that: The number of the oil inlets (102) is four, and the four groups of the oil inlets (102) are arranged in an equidistant circular array on the outer end surface of the outer ring (1).

6. A high-stability drawn cup needle roller bearing according to claim 5, characterized in that: The upper end surface and the lower end surface of the outer ring (1) are provided with dust covers (5) with interference fit.

7. A high stability drawn cup needle roller bearing according to claim 6, characterized in that: A sealing plug (501) is provided on the dust cover (5) near the oil filling port (101).

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