Noise-reducing multipurpose roller bearing with cambered surface and track assembly thereof

Abstract

The utility model discloses a multi-purpose roller bearing with cambered surface and noise reduction and track assembly thereof, including locating shaft, outer ring, inner ring and steel ball, locating shaft outside sleeve is provided with inner ring, inner ring outside is provided with outer ring, steel ball is provided between inner ring and outer ring through retainer, and the outer ring is provided with the outer ring. Dustproof sealing covers are arranged between the inner ring and the outer ring and located on the two outer sides of the retainer correspondingly, the lower end of the inner ring is exposed out of the outer ring, external threads are arranged at the lower end of the positioning shaft, and a limiting groove is formed in the upper end of the inner ring. The upper end of the positioning shaft is provided with a limiting table which is clamped in the limiting groove, the outer end face of the limiting table is flush with the upper end face of the inner ring, the upper end face and the lower end face of the outer ring are arc-shaped chamfered faces, the R angle of each arc-shaped chamfered face is 120 degrees, and according to the structure, the smoothness of the bearing moving on the guide rail in the later period is guaranteed.

Description

Technical Field

[0001] This utility model relates to the technical field of roller bearings, specifically a multi-purpose roller bearing with an arc surface to reduce noise and its track assembly. Background Technology

[0002] Existing rollers have inner and outer rings of the same height, requiring washers for installation. One-piece rollers have a complex manufacturing process, resulting in low precision stability. Furthermore, existing rollers with equal inner and outer ring heights require additional shims during use, and the added components lead to a loss of precision.

[0003] Therefore, patent publication number CN 217993992 U describes a roller suitable for multiple tracks, including a positioning shaft and an outer ring. An inner ring is fitted around the outside of the positioning shaft, and a limiting block is provided at the lower end of the positioning shaft. The lower end face of the inner ring is in contact with the upper end face of the limiting block. An outer ring is provided around the inner ring, and the inner ring is connected to the outer ring via a bearing. The upper end of the inner ring protrudes from the outer ring. Both the upper and lower end faces of the outer ring are inclined, and the included angle between the upper and lower end faces of the outer ring is 90°. However, this structure has the following problems: although the intermediate positioning shaft and the inner ring adopt a separate structure for easy processing, the positioning shaft... The limiting block is exposed outside the inner ring, causing unevenness on one end of the roller, resulting in an abrupt overall structure and making it prone to collisions with other components. In addition, the upper and lower end faces of the outer ring are both beveled. When the beveled surfaces are matched with the sliding grooves on both sides of the guide rail (it is impossible to make the two sides of the guide rail sliding grooves perfectly equal in height during machining), if the sliding grooves on both sides of the guide rail are not at the same height, the bearings on both sides cannot automatically find the center position according to the height of the guide rail sliding groove during the matching process, and ultimately cannot guarantee smooth bearing sliding. Therefore, improvements are needed. Utility Model Content

[0004] The purpose of this invention is to provide a multi-purpose roller bearing with an arc surface to reduce noise and its track assembly to solve the problems mentioned in the background art, such as the positioning shaft protruding from the outer ring, which makes it easy to collide with other components later, and the bearing side that mates with the guide rail groove cannot automatically find the center position according to the height of the guide rail groove, ultimately failing to ensure smooth bearing sliding.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-purpose roller bearing with arc surface to reduce noise, comprising a positioning shaft, an outer ring, an inner ring, and steel balls. The inner ring is sleeved on the outside of the positioning shaft, and the outer ring is provided on the outside of the inner ring. The steel balls are disposed between the inner ring and the outer ring by a cage. A dustproof sealing cover is provided between the inner ring and the outer ring on both sides of the cage. The lower end of the inner ring protrudes from the outer ring. The lower end of the positioning shaft is provided with an external thread. The upper end of the inner ring is provided with a limiting groove. The upper end of the positioning shaft is provided with a limiting platform that is engaged in the limiting groove and whose outer end face is flush with the upper end face of the inner ring. The upper and lower end faces of the outer ring are both arc-shaped chamfered surfaces, and the R angle of the arc-shaped chamfered surface is 120°.

[0006] Preferably, to ensure smooth assembly, an arc-shaped surface one is provided on the inner side of the lower end of the inner ring, and an arc-shaped surface two with an R angle of 0.5° is provided on the outer side of the lower end of the inner ring.

[0007] Preferably, in order to improve the sealing effect and ensure the strength of the end cap, the inner side of the dustproof sealing cap is provided with a skeleton, and the outer side of the skeleton is covered with a sealing plastic layer.

[0008] Preferably, the included angle between the upper and lower end faces of the outer ring is 90°, and the included angle between the outer end face of the outer ring and the arc-shaped chamfered surface is 45°.

[0009] As a preferred option, and to facilitate later assembly, an internal hexagonal groove is provided at the center of the limiting platform.

[0010] Preferably, to further improve sealing performance, a trapezoidal sealing tongue is provided on the inner side of the sealing plastic layer, a trapezoidal groove that mates with the trapezoidal sealing tongue is provided on the outer wall of the inner ring, a sealing locking tongue is provided on the outer side of the sealing plastic layer, and a limiting groove that mates with the sealing locking tongue is provided in the inner side of the outer ring.

[0011] This utility model also discloses a track assembly, including the aforementioned multi-purpose roller bearing with arc surface noise reduction and a track base. The track base is provided with two sets of left-right symmetrical roller groups. Each set of roller groups includes two arc-surfaced multi-purpose roller bearings with noise reduction, which are spaced apart and on the same horizontal plane. A guide rail is slidably connected between the two sets of roller groups. The guide rail has trapezoidal grooves on both sides that mate with the outer end faces of the corresponding set of roller groups. The upper and lower arc-shaped chamfered surfaces of the arc-surfaced multi-purpose roller bearings mate with the inclined sides of the trapezoidal grooves.

[0012] Preferably, for ease of installation, the track base is provided with one or more mounting through holes, and each mounting through hole has a nut mounting groove at its bottom. After the lower end of the positioning shaft passes through the mounting through hole, it ensures that the external thread can be inserted into the nut mounting groove, and the external thread is threadedly connected with the nut in the nut mounting groove.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: By setting the upper and lower end faces of the outer ring as arc-shaped chamfered surfaces with an R angle of 120°, this structure ensures that when the device is installed on the track base, the arc-shaped chamfered surfaces of the upper and lower end faces match the trapezoidal grooves on the guide rail. If the height of the trapezoidal grooves is inconsistent, the arc-shaped chamfered surfaces can automatically find the center position according to the height of the trapezoidal grooves, thus ensuring the smoothness of the multi-purpose roller bearing with arc-shaped surface noise reduction when sliding in the guide rail. It also facilitates the removal of dust or debris remaining in the trapezoidal grooves, avoiding jamming during sliding. At the same time, the arc-shaped chamfered surface design can further reduce noise during use. Attached Figure Description

[0014] Figure 1 This is a cross-sectional schematic diagram of a multi-purpose roller bearing with an arc surface for noise reduction in Embodiment 1.

[0015] Figure 2 for Figure 1 Enlarged structural diagram at point A in the middle;

[0016] Figure 3 This is a schematic diagram of the positioning shaft.

[0017] Figure 4 This is a top view of the positioning shaft in Embodiment 1.

[0018] Figure 5 This is a top view of the multi-purpose roller bearing with curved surface for noise reduction installed on the track base in Embodiment 1.

[0019] Figure 6 This is a front view of the multi-purpose roller bearing with curved surface for noise reduction installed on the track base in Embodiment 1.

[0020] Figure 7 This is a cross-sectional schematic diagram of a multi-purpose roller bearing with an arc surface for noise reduction in Embodiment 1.

[0021] Figure 8 for Figure 7 Enlarged view of point B.

[0022] In the diagram: 1. Positioning shaft; 2. Outer ring; 3. Inner ring; 4. Steel ball; 5. Cage; 6. Dustproof seal cover; 101. External thread; 7. Limiting groove; 8. Limiting platform; 9. Arc-shaped chamfered surface; 10. Arc-shaped surface one; 11. Arc-shaped surface two; 601. Frame; 602. Sealing plastic layer; 12. Hexagonal groove; 13. Trapezoidal sealing tongue; 14. Trapezoidal groove; 15. Rail base; 16. Trapezoidal slide; 17. Mounting through hole; 18. Nut mounting slot; 19. Nut; 20. Sealing lock tongue; 21. Limiting groove; 22. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0024] Example 1

[0025] Please see Figure 1-4 This utility model provides an embodiment of a multi-purpose roller bearing with an arc surface to reduce noise, comprising a positioning shaft 1, an outer ring 2, an inner ring 3, and steel balls 4. The inner ring 3 is sleeved on the outer side of the positioning shaft 1. To ensure smooth assembly, an arc-shaped surface 10 is provided on the inner side of the lower end of the inner ring 3, and an arc-shaped surface 11 with an R angle of 0.5° is provided on the outer side of the lower end of the inner ring 3. This ensures that when the positioning shaft 1 is inserted into the inner ring 3, it will not cause the outer wall of the positioning shaft 1 to make hard contact with the inner wall of the inner ring 3 and wear the surface of the positioning shaft 1 when it extends from the inner side of the lower end of the inner ring 3, resulting in a smoother insertion. Furthermore, the arc-shaped surface 11 on the outer side of the lower end of the inner ring 3 makes the contact between the inner ring 3 and the end face of the track base 15 smoother.

[0026] An outer ring 2 is provided outside the inner ring 3. The steel ball 4 is disposed between the inner ring 3 and the outer ring 2 via a retainer 5. A dustproof sealing cover 6 is provided on both sides of the inner ring 3 and the outer ring 2 relative to the outer sides of the retainer 5. To improve the sealing effect and ensure the strength of the end cap, a skeleton 601 is provided on the inner side of each dustproof sealing cover 6. The outer side of the skeleton 601 is covered with a sealing plastic layer 602. The lower end of the inner ring 3 protrudes from the outer ring 2. The lower end of the positioning shaft 1 is provided with an external thread 101. The upper end of the inner ring 3 is provided with a limit groove 7. The upper end of the positioning shaft 1 is provided with a locking limit. A limiting platform 8 is positioned within the groove 7, with its outer end face flush with the upper end face of the inner ring 3. In this embodiment, the height of the limiting platform 8 is flush with both the inner ring 3 and the outer ring 2, ensuring that the surface is not abrupt when the entire device is installed on the track base 15, guaranteeing the flatness of the upper surface, and preventing collisions with other components due to uneven bearing surfaces. To facilitate later assembly, an internal hexagonal groove 12 is provided at the center of the limiting platform 8. After inserting an internal hexagonal tool into the internal hexagonal groove 12, it is convenient to rotate the positioning shaft 1, allowing the device to be fixed to the track base 15 more quickly.

[0027] The upper and lower end faces of the outer ring 2 are both arc-shaped chamfered surfaces 9, with an R angle of 120°. By setting the upper and lower end faces of the outer ring 2 to arc-shaped chamfered surfaces 9 with an R angle of 120°, it is ensured that when the device is installed on the track base 15, the arc-shaped chamfered surfaces 9 of the upper and lower end faces will cooperate with the trapezoidal slide groove 17 on the guide rail 16. If the height of the trapezoidal slide groove 17 is inconsistent, the arc-shaped chamfered surface 9 can automatically find the center position according to the height of the trapezoidal slide groove 17, thus ensuring the smoothness of the multi-purpose roller bearing with arc surface noise reduction when sliding in the guide rail 16. It also facilitates the removal of dust or debris remaining in the trapezoidal slide groove 17, avoiding jamming during sliding. At the same time, the arc-shaped chamfered surface 9 can further reduce noise during use.

[0028] The included angle between the upper and lower end faces of the outer ring 2 is 90°, and the included angle between the outer end face of the outer ring 2 and the arc-shaped chamfered surface 9 is 45°.

[0029] like Figure 5 , Figure 6As shown, this embodiment also discloses a track assembly, including the aforementioned multi-purpose roller bearing with arc surface noise reduction and a track base 15. The track base 15 is provided with two sets of left-right symmetrical roller groups. Each set of roller groups includes two spaced-apart multi-purpose roller bearings with arc surface noise reduction on the same horizontal plane. A guide rail 16 is slidably connected between the two sets of roller groups. The guide rail 16 has trapezoidal grooves 17 on both sides that mate with the outer end faces of the corresponding set of roller groups. The upper and lower arc-shaped chamfered surfaces 9 of the multi-purpose roller bearings with arc surface noise reduction mate with the inclined sides of the trapezoidal grooves 17. In this embodiment, in order to ensure that the guide rail 16 moves more smoothly, smoothly and stably, two sets of roller groups are provided, each set of roller groups including two spaced-apart multi-purpose roller bearings with arc surface noise reduction, which ultimately makes the movement of the track assembly smoother.

[0030] Preferably, for ease of installation, the track base 15 is provided with one or more mounting through holes 18, and the bottom of each mounting through hole 18 is provided with a nut mounting groove 19. After the lower end of the positioning shaft 1 passes through the mounting through hole 18, it ensures that the external thread 101 can be inserted into the nut mounting groove 19, and the external thread 101 is threadedly connected to the nut 20 in the nut mounting groove 19.

[0031] This structure sets both the upper and lower end faces of the outer ring 2 as arc-shaped chamfered surfaces 9 with a radius of 120°. This ensures that when the device is installed on the track base 15, the arc-shaped chamfered surfaces 9 of the upper and lower end faces will cooperate with the trapezoidal slide grooves 17 on the guide rail 16. If the height of the trapezoidal slide grooves 17 is inconsistent, the arc-shaped chamfered surfaces 9 can automatically find the center position according to the height of the trapezoidal slide grooves 17. This ensures the smooth sliding of the multi-purpose roller bearing with arc-shaped surface to reduce noise in the guide rail 16. It also facilitates the removal of dust or debris remaining in the trapezoidal slide grooves 17, preventing jamming during sliding. At the same time, the design of the arc-shaped chamfered surfaces 9 can further reduce noise during use.

[0032] Example 2

[0033] Please see Figure 7-8This utility model provides an embodiment of a multi-purpose roller bearing with an arc surface to reduce noise. Preferably, to further improve sealing performance, a trapezoidal sealing tongue 13 is provided on the inner side of the sealing plastic layer 602, a trapezoidal groove 14 that mates with the trapezoidal sealing tongue 13 is provided on the outer wall of the inner ring 3, a sealing locking tongue 21 is provided on the outer side of the sealing plastic layer 602, and a limiting groove 22 that mates with the sealing locking tongue 21 is provided in the inner ring 2. In this embodiment, by providing a trapezoidal sealing tongue 13 that can be inserted into the outer wall of the inner ring 3 on the inner side of the sealing plastic layer 602, and providing a sealing locking tongue 21 that can be inserted into the outer ring 2 on the outer ring of the sealing plastic layer 602, the sealing performance is further improved once the upper and lower dustproof sealing covers 6 are closed.

Claims

1. A multi-purpose roller bearing with arc surface for noise reduction, comprising a positioning shaft (1), an outer ring (2), an inner ring (3), and steel balls (4), wherein the inner ring (3) is sleeved on the outer side of the positioning shaft (1), and the outer ring (2) is provided on the outer side of the inner ring (3), the steel balls (4) are disposed between the inner ring (3) and the outer ring (2) by means of a retainer (5), and a dustproof sealing cover (6) is provided between the inner ring (3) and the outer ring (2) on both sides of the retainer (5), wherein the lower end of the inner ring (3) protrudes from the outer ring (2), and the lower end of the positioning shaft (1) is provided with an external thread (101), characterized in that: The upper end of the inner ring (3) is provided with a limiting groove (7), the upper end of the positioning shaft (1) is provided with a limiting platform (8) which is clamped in the limiting groove (7) and the outer end surface of which is flush with the upper end surface of the inner ring (3), the upper and lower end surfaces of the outer ring (2) are both arc-shaped chamfer surfaces (9), and the R angle of the arc-shaped chamfer surface (9) is 120°.

2. A multi-purpose roller bearing with a cambered surface for reducing noise according to claim 1, characterized in that: An arc-shaped surface one (10) is arranged on the inner side of the lower end of the inner ring (3), and an arc-shaped surface two (11) with an R angle of 0.5° is arranged on the outer side of the lower end of the inner ring (3).

3. A multi-purpose roller bearing with a cambered surface for reducing noise according to claim 2, characterized in that: The inner side of the dustproof sealing cover (6) is provided with a framework (601), and the outer side of the framework (601) is rubberized with a sealing plastic layer (602).

4. The multi-purpose roller bearing with cambered surface for reducing noise according to claim 3, wherein: The included angle between the upper and lower end surfaces of the outer ring (2) is 90°, and the included angle between the outer end surface of the outer ring (2) and the arc-shaped chamfer surface (9) is 45°.

5. The multi-purpose roller bearing with cambered surface for reducing noise according to claim 3, wherein: A hexagonal recess (12) is arranged at the center of the limiting platform (8).

6. The multi-purpose roller bearing with a cambered surface for reducing noise according to claim 3, wherein: The inner side of the sealing plastic layer (602) is provided with a trapezoidal sealing tongue (13), the outer wall of the inner ring (3) is provided with a trapezoidal groove (14) matched with the trapezoidal sealing tongue (13), the outer side of the sealing plastic layer (602) is provided with a sealing lock tongue (21), and the outer ring (2) is provided with a limiting groove (22) matched with the sealing lock tongue (21).

7. A track assembly comprising the arc face noise reducing multipurpose roller bearing of any one of claims 1-6, wherein: The track base (15) is provided with two groups of left-right symmetrical roller groups, each group of roller groups comprises two arc-surface noise-reducing multipurpose roller bearings which are arranged at intervals and on the same horizontal plane, a guide rail (16) is slidably connected between the two groups of roller groups, the two sides of the guide rail (16) are provided with trapezoidal sliding grooves (17) matched with the outer end surfaces of the corresponding group of roller groups, and the upper and lower arc-shaped chamfer surfaces (9) of the arc-surface noise-reducing multipurpose roller bearings are matched with the inclined edges of the trapezoidal sliding grooves (17).

8. A track assembly according to claim 7, wherein: The track base (15) is provided with one or more than one mounting through hole (18), the bottom of each mounting through hole (18) is provided with a nut mounting groove (19), the lower end of the positioning shaft (1) is ensured to be capable of being inserted into the nut mounting groove (19) after penetrating through the mounting through hole (18), and the external thread (101) is threadedly connected with the nut (20) in the nut mounting groove (19).

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