Dust-proof rolling bearing structure

Abstract

The application relates to the technical field of motor bearings, in particular to a dustproof rolling bearing structure which comprises a bearing main body and a dustproof sealing structure, the bearing main body comprises a bearing chamber, a bearing installed in the bearing chamber, a bearing inner cover and a bearing outer cover installed on the two sides of the bearing chamber, and a first sealing ring is arranged on the bearing outer cover; the dustproof sealing structure comprises a sealing support installed on the bearing outer cover and a floating sealing ring installed in the sealing support; the application has the advantages that lubricating oil is prevented from flowing to the outside of a motor through a gap, external dust is prevented from entering the inside of the bearing through the gap to contaminate lubricating grease, and the lubrication and service life of the rolling bearing are improved.

Description

Technical Field

[0001] This application relates to the technical field of motor bearings, and in particular to a dust-proof rolling bearing structure. Background Technology

[0002] Currently, in the use of existing rolling bearings, due to the unavoidable gap between the bearing cover and the shaft, lubricating oil can flow to the outside of the motor through the gap, and external dust can enter the bearing through the gap, contaminating the grease, resulting in poor lubrication and short life of the rolling bearing. Utility Model Content

[0003] To address the aforementioned problems, this application provides a dust-proof rolling bearing structure.

[0004] This application provides a dust-proof rolling bearing structure, which adopts the following technical solution: A dustproof rolling bearing structure includes a bearing body and a dustproof sealing structure. The bearing body includes a bearing chamber, a bearing installed in the bearing chamber, an inner bearing cover and an outer bearing cover installed on the outer and outer sides of the bearing chamber. The outer bearing cover is provided with a first sealing ring. The dustproof sealing structure includes a sealing bracket installed on the outer cover of the bearing and a floating sealing ring installed inside the sealing bracket.

[0005] In one embodiment: the bearing body further includes a retaining ring, one end of which abuts against the inner ring of the bearing and the other end of which abuts against the shaft retaining ring. An annular baffle is provided at the end of the retaining ring away from the bearing. The outer diameter of the annular baffle is larger than the inner diameter of the outer ring of the bearing, and a gap is provided between the annular baffle and the outer cover of the bearing.

[0006] In one embodiment: a second sealing ring is provided between the outer ring of the bearing and the outer cover of the bearing, and the second sealing ring is provided with a sealing tongue extending away from the bearing and abutting against the annular baffle.

[0007] In one embodiment: the sealing bracket is formed by splicing two semi-circular rings, and the sealing bracket has at least one mounting cavity for installing a floating sealing ring.

[0008] In one embodiment: two claws are bolted to the bearing cover, the claws are provided with wedge-shaped surfaces, and both semicircular rings are provided with abutting slopes for the wedge-shaped surfaces to abut against.

[0009] In one embodiment: the radial width of the floating seal ring is greater than the depth of the mounting cavity, and the inner ring of the floating seal ring is provided with a floating groove and the outer ring is provided with an oil storage groove.

[0010] In one embodiment, the oil storage tanks are distributed at equal intervals along the circumference.

[0011] In one embodiment, the oil storage tank has a triangular cross-section.

[0012] In one embodiment: the oil storage tank has an annular structure, and a deformation groove is formed radially at the bottom of the oil storage tank.

[0013] In one embodiment, the width of the floating sealing ring is smaller than the width of the mounting cavity.

[0014] In summary, this application has the following beneficial effects: 1. By setting the first and second sealing rings, lubricating oil can be effectively prevented from flowing to the outside of the motor through the gap; 2. By setting up floating seals and first seals, external dust can be effectively prevented from entering the bearing through the gap and contaminating the grease, thus improving the lubrication and life of rolling bearings. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the dust-proof rolling bearing structure installed on the motor in this embodiment; Figure 2 This is a schematic diagram of the dust-proof rolling bearing structure in this embodiment; Figure 3 This is a schematic diagram of the sealing bracket in this embodiment; Figure 4 This is a schematic diagram of the structure of one type of floating sealing ring in this embodiment; Figure 5 This is a schematic diagram of another type of floating sealing ring in this embodiment.

[0016] In the diagram, 10 is the motor; 11 is the motor shaft; 12 is the shaft retaining ring; 100 is the bearing body; 110 is the bearing housing; 120 is the bearing; 130 is the bearing inner cover; 140 is the bearing outer cover; 150 is the retaining ring; 200 is the dustproof sealing structure; 210 is the sealing bracket; 211 is the pin; 212 is the insertion hole; 213 is the abutment slope; 214 is the mounting cavity; 220 is the floating sealing ring; 221 is the floating groove; 222 is the oil reservoir; 223 is the deformation groove; 300 is the first sealing ring; 310 is the sealing lip; 400 is the second sealing ring; 410 is the sealing tongue; 500 is the retaining claw; and 510 is the wedge-shaped surface. Detailed Implementation

[0017] like Figure 1 The diagram shown is a schematic of the dustproof rolling bearing 120 structure installed on the motor 10 in this embodiment. The dustproof rolling bearing 120 structure is fixedly installed on the front and rear end covers of the motor 10.

[0018] like Figure 1 and 2 As shown, this embodiment discloses a dustproof rolling bearing 120 structure, which includes a bearing body 100 and a dustproof sealing structure 200.

[0019] Reference Figure 2 The bearing body 100 includes a bearing chamber 110, a bearing 120 installed in the bearing chamber 110, an inner bearing cover 130 and an outer bearing cover 140 installed on the inner and outer sides of the bearing chamber 110, and a retaining ring 150 installed on the motor shaft 11. The motor shaft 11 is inserted into the bearing body 100.

[0020] A first sealing ring 300 is provided on the bearing outer cover 140. The first sealing ring 300 has a C-shaped structure, and a sealing lip 310 is provided on the inner circle of the first sealing ring 300 away from the C-shaped opening. The sealing lip 310 makes the cross-section of the first sealing ring 300 at the inner circle position form a herringbone shape. The C-shaped structure improves the dustproof effect, and the sealing lip 310 further prevents lubricating oil from flowing to the outside of the motor 10 through the gap.

[0021] One end of the retaining ring 150 abuts against the inner ring of the bearing 120, and the other end abuts against the shaft retaining ring 12. The shaft retaining ring 12 is engaged with the bearing 120 of the motor 10. During installation, the inner ring of the bearing 120 abuts against the step of the bearing 120 of the motor 10. After the retaining ring 150 is installed, it is fixed by the shaft retaining ring 12, so that the bearing 120 is fixed axially to the bearing 120 of the motor 10.

[0022] The end of the retaining ring 150 away from the bearing 120 is provided with an annular baffle. The outer diameter of the annular baffle is larger than the inner diameter of the outer ring of the bearing 120, and a gap is provided between the annular baffle and the bearing outer cover 140.

[0023] Furthermore, in order to improve the sealing performance, a second sealing ring 400 is provided between the outer ring of the bearing 120 and the outer cover of the bearing 140, and the installation position between the outer cover of the bearing 120 and the bearing 120 is sealed by the second sealing ring 400.

[0024] Additionally, a sealing tongue 410 is provided on the second sealing ring 400, extending away from the bearing 120 and abutting against the annular baffle. The end of the sealing tongue 410 abuts against the end face of the annular baffle, and its deformation ensures a sealing effect while dynamically compensating for rotational wear between the annular baffle and the sealing tongue 410. Furthermore, due to the deformation of the sealing tongue 410, during the rotation of the bearing 120 and when lubricating oil overflows due to heat, the sealing tongue 410 can offset this pressure through deformation, thus forming a better seal.

[0025] The dustproof sealing structure 200 includes a sealing bracket 210 mounted on the bearing outer cover 140, and a floating sealing ring 220 mounted within the sealing bracket 210.

[0026] The sealing bracket 210 is formed by splicing two semi-circular rings, and in order to facilitate fixing, a pin 211 and a socket 212 can be provided on the splicing end face of the two semi-circular rings.

[0027] To secure the two semi-circular rings after splicing, two claws 500 are bolted onto the bearing outer cover 140. Since the connection between the bearing outer cover 140 and the bearing housing 110 already requires bolts, the claws 500 can directly use the connecting bolts between the bearing outer cover 140 and the bearing housing 110. Thus, no processing or adjustment of the structure of the bearing outer cover 140 is required.

[0028] The chuck 500 is provided with a wedge-shaped surface 510, and both semicircular rings are provided with abutting inclined surfaces 213 for the wedge-shaped surface 510 to abut against. After the bolts are tightened, the wedge-shaped surface 510 on the chuck 500 abuts against the abutting inclined surface 213. Under the action of the inclined surface, the two semicircular rings can be well spliced ​​together to form a sealing bracket 210.

[0029] The sealing bracket 210 has at least one mounting cavity 214 for mounting the floating sealing ring 220. In this embodiment, there are two mounting cavities 214, and a floating sealing ring 220 is installed in each mounting cavity 214.

[0030] The width of the floating seal ring 220 in the radial direction is greater than the depth of the mounting cavity 214. Thus, after the two semi-circular rings are spliced ​​together, a force can be applied to the floating seal ring 220 in the radial direction, which can make the floating seal ring 220 better seal with the bearing 120 of the motor 10.

[0031] To reduce wear after the floating seal ring 220 is pressed against the bearing 120 of the motor 10, in one structure, such as Figure 2 and Figure 4 The inner ring of the floating seal ring 220 is provided with a floating groove 221 and the outer ring is provided with an oil storage groove 222. The cross-section of the oil storage groove 222 is triangular and the oil storage groove 222 is distributed at equal intervals along the circumference.

[0032] The floating groove 221 improves deformation capacity to reduce wear, and it can also hold lubricating oil to further reduce wear. The oil reservoir 222 stores oil on the outer ring, which reduces the friction between the floating seal ring 220 and the seal bracket 210.

[0033] In another structure, such as Figure 2 and Figure 5The floating seal ring 220 has a floating groove 221 on the inner ring and an oil storage groove 222 on the outer ring. The oil storage groove 222 has an annular structure and a deformation groove 223 is radially opened at the bottom of the oil storage groove 222.

[0034] In this embodiment, both of the above-mentioned floating sealing rings 220 are used.

[0035] Meanwhile, the width of the floating seal ring 220 is smaller than the width of the mounting cavity 214. This allows the floating seal ring 220 to deform better within the mounting cavity 214 when subjected to radial force, further reducing the direct impact on the bearing 120 of the motor 10 and thus further mitigating wear between the two.

[0036] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A dust-proof rolling bearing structure, characterized in that: The bearing body (100) includes a bearing housing (110) and a dustproof sealing structure (200). The bearing housing (100) includes a bearing chamber (110), a bearing (120) installed in the bearing chamber (110), an inner bearing cover (130) and an outer bearing cover (140) installed on the inner and outer sides of the bearing chamber (110). The outer bearing cover (140) is provided with a first sealing ring (300). The dustproof sealing structure (200) includes a sealing bracket (210) installed on the bearing outer cover (140) and a floating sealing ring (220) installed in the sealing bracket (210).

2. The dust-proof rolling bearing (120) structure according to claim 1, characterized in that: The bearing body (100) also includes a retaining ring (150), one end of which abuts against the inner ring of the bearing (120) and the other end abuts against the rotating shaft retaining ring (12). The end of the retaining ring (150) away from the bearing (120) is provided with an annular baffle. The outer diameter of the annular baffle is larger than the inner diameter of the outer ring of the bearing (120). The annular baffle is provided with a gap between it and the bearing outer cover (140).

3. The dust-proof rolling bearing (120) structure according to claim 2, characterized in that: A second sealing ring (400) is provided between the outer ring of the bearing (120) and the outer cover of the bearing (140). The second sealing ring (400) is provided with a sealing tongue (410) extending away from the bearing (120) and abutting against the annular baffle.

4. The dust-proof rolling bearing (120) structure according to claim 1, characterized in that: The sealing bracket (210) is formed by splicing two semi-circular rings, and the sealing bracket (210) has at least one mounting cavity (214) for mounting the floating sealing ring (220).

5. The dustproof rolling bearing (120) structure according to claim 4, characterized in that: Two claws (500) are bolted to the outer cover (140) of the bearing. The claws (500) are provided with wedge-shaped surfaces (510). Both semicircular rings are provided with abutting slopes (213) for the wedge-shaped surfaces (510) to abut against.

6. The dust-proof rolling bearing (120) structure according to claim 5, characterized in that: The width of the floating seal ring (220) in the radial direction is greater than the depth of the mounting cavity (214). The inner ring of the floating seal ring (220) is provided with a floating groove (221) and the outer ring is provided with an oil storage groove (222).

7. The dust-proof rolling bearing (120) structure according to claim 6, characterized in that: The oil storage tanks (222) are distributed at equal intervals along the circumference.

8. The dustproof rolling bearing (120) structure according to claim 7, characterized in that: The cross-section of the oil storage tank (222) is triangular.

9. The dustproof rolling bearing (120) structure according to claim 6, characterized in that: The oil storage tank (222) has an annular structure, and a deformation groove (223) is provided radially at the bottom of the oil storage tank (222).

10. The dustproof rolling bearing (120) structure according to claim 9, characterized in that: The width of the floating sealing ring (220) is smaller than the width of the mounting cavity (214).

Images