Needle bearing with good sealing performance

Abstract

The utility model discloses a needle roller bearing with good sealing performance, which comprises an inner ring, an outer ring, a retainer, a needle roller and a sealing gasket, an oil filler core is arranged on the sealing gasket, the sealing gasket comprises a dustproof cover, a connecting plate and a sealing plate, a screw hole is arranged on the dustproof cover, the oil filler core is arranged on the dustproof cover, an oil inlet is arranged on the side wall of the oil filler core, and the oil inlet is communicated with the connecting plate. The bottom of the oiling core is provided with an oil discharge outlet, and the bottom of the sealing gasket is provided with a shunting hole. The oil injection core is arranged on the sealing gasket and matched with the oil distribution hole in the sealing gasket, and the oil injection core can be lifted up and down by rotating the oil injection core, so that when the bearing needs to be oiled, the oil injection core is lifted, an oil inlet in the side wall leaks out, oil injection is convenient, the oil injection core is stored in the sealing plate when oil injection is not needed, and dust falling or water entering the oil injection hole is avoided; and the convenience of the bearing is improved while the sealing performance of the bearing is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of needle roller bearings, in particular to a needle roller bearing with good sealing performance. Background Art

[0002] Needle roller bearings are roller bearings with cylindrical rollers that are thin and long relative to their diameter. 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 other types of bearings, the outer diameter is the smallest, which is particularly suitable for support structures with limited radial installation dimensions.

[0003] However, the existing needle roller bearings are easily affected by foreign impurities during operation, such as water, dust and iron filings, which will accelerate the wear and corrosion of the bearings and reduce the service life of the bearings. Therefore, it is necessary to install a sealing gasket. However, after the bearing is installed with the sealing gasket, it is inconvenient to add oil to the needle roller bearing. At present, most of the oil is injected into the bearing through the gap between the sealing gasket and the bearing through a needle tube. However, the needle head can easily damage the sealing gasket, thereby affecting the sealing of the bearing. In addition, this method causes uneven oil injection and easily causes eccentric wear of the bearing. Therefore, a needle roller bearing with good sealing performance is needed to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a needle roller bearing with good sealing performance, which has the advantages of good sealing effect and convenient bearing oil replenishment, and solves the problem that it is inconvenient to add lubricating oil to the needle roller bearing with a sealing gasket in the prior art and the sealing gasket is easily damaged during the lubricating oil filling process.

[0005] To achieve the above object, the utility model provides the following technical solution: a needle roller bearing with good sealing performance, comprising an inner ring, an outer ring, a cage, a needle roller and a sealing gasket, wherein an oil injection core is provided on the sealing gasket;

[0006] The sealing gasket includes a dust cover, a connecting plate and a sealing plate. The dust cover has a screw hole. The oil filling core is installed on the dust cover. The side wall of the oil filling core is provided with an oil inlet. The bottom of the oil filling core is provided with an oil outlet. The bottom of the sealing gasket is provided with a diversion hole.

[0007] As a preferred needle roller bearing with good sealing performance of the utility model, the sealing plate is provided with a clamping strip near the inner ring end, the outer end surface of the inner ring is provided with a clamping groove, and the sealing plate and the inner ring are clamped together through the clamping strip and the clamping groove.

[0008] As a preferred needle roller bearing with good sealing performance of the utility model, the bottom of the connecting plate is fixedly connected to the end of the sealing plate away from the clamping strip, and the angle between the connecting plate and the sealing plate is forty-five degrees.

[0009] As a preferred needle roller bearing with good sealing performance of the utility model, the outer end face of the oil injection core is provided with an external thread, the top of the oil injection core is provided with a regular hexagonal notch, the upper end face of the sealing plate is provided with a screw hole, and the oil injection core is inserted into the screw hole and threadedly connected with the sealing plate.

[0010] As a preferred needle roller bearing with good sealing performance of the utility model, the upper end surface of the sealing plate is provided with an oil discharge piston, and the oil discharge piston is inserted into the oil discharge port and slidably connected therewith.

[0011] As a preferred needle roller bearing with good sealing performance of the utility model, the diameter of the oil discharge port is larger than the diameter of the oil inlet port.

[0012] As a preferred needle roller bearing with good sealing performance of the utility model, a reinforcing rib is arranged at the connection between the connecting plate and the sealing plate.

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

[0014] 1. The utility model arranges an oil filling core on the sealing gasket and cooperates with the oil distribution hole on the sealing gasket. The oil filling core can be raised and lowered by rotating it, so that when the bearing needs to be oiled, the oil filling core rises and the oil inlet of the side wall leaks out, which is convenient for oiling. When oiling is not needed, the oil filling core is retracted into the sealing plate, thereby preventing dust or water from entering the oil filling hole, ensuring the sealing performance of the bearing while improving the convenience of the bearing.

[0015] 2. The utility model forms a multi-stage sealing structure through the sealing gasket structure composed of the dust cover, the connecting plate and the sealing plate, which greatly enhances the sealing performance of the bearing. The oil filling core and the oil discharge piston cooperate to limit the inward bending of the sealing plate, thereby greatly reducing the probability of the sealing gasket falling off. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] Figure 2 It is a side sectional view of the utility model;

[0018] Figure 3 For the utility model Figure 2 Enlarged view of point A in the middle;

[0019] Figure 4 It is a schematic diagram of the cross-sectional structure of the sealing gasket of the present utility model.

[0020] In the figure: 1. inner ring; 101. slot; 2. outer ring; 3. retaining frame; 4. needle roller; 5. sealing gasket; 510. dust cover; 520. connecting plate; 630. sealing plate; 631. clamping strip; 532. oil drain piston; 533. reinforcing rib; 534. diverter hole; 511. screw hole; 6. oil filling core; 601. oil inlet; 602. oil drain. DETAILED DESCRIPTION

[0021] See also Figure 1-Figure 4 , a needle roller bearing with good sealing performance, comprising an inner ring 1, an outer ring 2, a cage 3, a needle roller 4 and a sealing gasket 5, wherein an oil injection core 6 is arranged on the sealing gasket 5;

[0022] The sealing gasket 5 includes a dust cover 510, a connecting plate 520 and a sealing plate 630, the dust cover 510 has a screw hole 511, the oil filling core 6 is installed on the dust cover 510, the side wall of the oil filling core 6 is provided with an oil inlet 601, the bottom of the oil filling core 6 is provided with an oil outlet 602, and the bottom of the sealing gasket 5 is provided with a diversion hole 534.

[0023] When the bearing is in use and needs to be oiled, the oil filling core 6 is rotated counterclockwise with an Allen wrench to make the oil filling core 6 rise upward, and the oil inlet 601 of the side wall leaks out, and oil is injected into the oil inlet 601 through the high-pressure needle tube. The lubricating oil passes through the oil filling core 6 and fills the gap between the connecting plate 520 and the sealing plate 630 from the oil discharge port 602, and then flows to the needle roller 4 from the diverter hole 534 to achieve the purpose of lubrication. When oiling is not needed, the oil filling core 6 is rotated clockwise to be retracted into the sealing plate 630, thereby preventing dust or water from entering the oil filling hole, ensuring the sealing performance of the bearing while improving the convenience of the bearing.

[0024] Furthermore, a clamping strip 631 is provided at the end of the sealing plate 630 close to the inner ring 1 , and a clamping groove 101 is provided at the outer end surface of the inner ring 1 . The sealing plate 630 and the inner ring 1 are clamped together through the clamping strip 631 and the clamping groove 101 .

[0025] The cooperation between the clamping strip 631 and the clamping slot 101 facilitates the installation of the sealing ring and can prevent the sealing ring from falling off.

[0026] Furthermore, the bottom of the connecting plate 520 is fixedly connected to the end of the sealing plate 630 away from the clamping strip 631, and the angle between the connecting plate 520 and the sealing plate 630 is forty-five degrees.

[0027] An annular sealing cavity is formed between the connecting plate 520 , the sealing plate 630 and the outer end surface of the inner ring 1 , so that the lubricating oil can flow to each diversion hole 534 for oil filling, and the lubricating oil can be applied to the edge of the clamping strip 631 to reduce the wear of the clamping strip 631 .

[0028] Furthermore, the outer end surface of the oil injection core 6 is provided with an external thread, the top of the oil injection core 6 is provided with a regular hexagonal notch, the upper end surface of the sealing plate 630 is provided with a screw hole 511, and the oil injection core 6 is inserted into the screw hole 511 and is threadedly connected to the sealing plate 630.

[0029] By rotating the oil filling core 6 so that it can be raised and lowered, when the bearing needs oiling, the oil filling core 6 rises and the oil inlet 601 on the side wall leaks out, making oiling convenient. When oiling is not needed, the oil filling core 6 is retracted into the sealing plate 630, thereby preventing dust or water from entering the oil filling hole.

[0030] Furthermore, an oil discharge piston 532 is disposed on the upper end surface of the sealing plate 630 , and the oil discharge piston 532 is inserted into the oil discharge port 602 and slidably connected thereto.

[0031] The oil discharge port 602 is squeezed by the oil discharge piston 532 to squeeze out the lubricating oil between the oil inlet 601 and the oil discharge port 602 , thereby preventing the lubricating oil at the oil discharge port 602 from hardening and solidifying and blocking the oil discharge port 602 .

[0032] Furthermore, the diameter of the oil discharge port 602 is greater than the diameter of the oil inlet 601 .

[0033] By increasing the distance between the oil discharge ports 602 , the probability of the oil discharge ports 602 being blocked is reduced.

[0034] Furthermore, a reinforcing rib 533 is provided at the connection between the connecting plate 520 and the sealing plate 630 .

[0035] The reinforcing ribs 533 are used to prevent the connection between the sealing plate 630 and the connecting plate 520 from being broken or bent.

[0036] 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 needle roller bearing with good sealing performance, comprising an inner ring (1), an outer ring (2), a cage (3), a needle roller (4) and a sealing gasket (5), characterized in that: The sealing gasket (5) is provided with an oil injection core (6); The sealing gasket (5) comprises a dust cover (510), a connecting plate (520) and a sealing plate (630); the dust cover (510) has a screw hole (511); the oil injection core (6) is mounted on the dust cover (510); the side wall of the oil injection core (6) is provided with an oil inlet (601); the bottom of the oil injection core (6) is provided with an oil outlet (602); and the bottom of the sealing gasket (5) is provided with a diversion hole (534).

2. A needle roller bearing with good sealing performance according to claim 1, characterized in that: The sealing plate (630) is provided with a clamping strip (631) at the end close to the inner ring (1), and the outer end surface of the inner ring (1) is provided with a clamping groove (101), and the sealing plate (630) and the inner ring (1) are clamped together through the clamping strip (631) and the clamping groove (101).

3. A needle roller bearing with good sealing performance according to claim 2, characterized in that: The bottom of the connecting plate (520) is fixedly connected to the end of the sealing plate (630) away from the clamping strip (631), and the angle between the connecting plate (520) and the sealing plate (630) is forty-five degrees.

4. A needle roller bearing with good sealing performance according to claim 3, characterized in that: The outer end surface of the oil injection core (6) is provided with an external thread, the top of the oil injection core (6) is provided with a regular hexagonal notch, the upper end surface of the sealing plate (630) is provided with a screw hole (511), and the oil injection core (6) is inserted into the screw hole (511) and is threadedly connected to the sealing plate (630).

5. A needle roller bearing with good sealing performance according to claim 4, characterized in that: An oil discharge piston (532) is provided on the upper end surface of the sealing plate (630), and the oil discharge piston (532) is inserted into the oil discharge port (602) and is slidably connected thereto.

6. A needle roller bearing with good sealing performance according to claim 5, characterized in that: The diameter of the oil discharge port (602) is greater than the diameter of the oil inlet port (601).

7. The needle roller bearing with good sealing performance according to claim 1, characterized in that: A reinforcing rib (533) is provided at the connection between the connecting plate (520) and the sealing plate (630).

Images