Plastic-coated bearing with knurled outer ring

Abstract

The utility model discloses an outer ring knurled plastic-coated bearing, which relates to the technical field of bearings and comprises a bearing main body, the bearing main body consists of a bearing outer ring, a ball and a bearing inner ring, the bearing outer ring is sleeved on the outer surface of the bearing inner ring, the ball is slidably arranged between the bearing outer ring and the bearing inner ring, and a group of knurled parts is circumferentially arranged on each of two sides of a main ring frame. Each set of knurling pieces comprises a plurality of knurling pieces, auxiliary ring frames are fixedly inserted into the two sides of the main ring frame, and the auxiliary ring frames are inserted into the main ring frame and used for fixing the knurling pieces. By designing the main ring frame, the inner ring frame, the knurling piece, the clamping ring, the ring groove and the clamping groove, after the knurling piece is abraded, the bearing body needs to be replaced, the bearing body arranged on the shaft rod in a sleeving mode does not need to be detached, the mode that the knurling piece of the bearing body is directly replaced is adopted, the whole bearing body is replaced, and the whole bearing body does not need to be detached; the normal work of the bearing main body can be ensured, the time is saved, and the knurling piece is more convenient to replace.

Description

Technical Field

[0001] The utility model relates to the technical field of bearings, in particular to an outer ring knurled plastic-coated bearing. Background Art

[0002] A bearing is a mechanical component that is mainly used to support a rotating body and reduce the friction resistance between moving pairs. Its basic function is to support the radial load and axial load of a rotating shaft or axle, and also to reduce friction.

[0003] In the process of belt transmission, the outer ring of the entire bearing of the prior art will constantly rub against the belt, causing the thickness and smoothness of the outer ring of the bearing to be affected, thereby affecting the normal use of the bearing. In order to solve this problem, a knurled plastic-coated part is often added to the bearing, so that when the bearing rubs against the belt, the knurled part can be used to reduce the friction between other parts of the bearing and the belt, thereby increasing the overall service life of the bearing. However, due to the friction between the knurls of the plastic-coated layer and the belt, friction heat is generated during operation, causing the plastic-coated layer to soften, resulting in relative sliding between the plastic-coated layer and the outer ring of the bearing, and relative rotation between the plastic and the outer ring of the bearing. At this time, the bearing will be affected during normal use, and the entire bearing can only be replaced. When replacing the bearing, it is necessary to use a tool to hit it vigorously, which is inconvenient to operate and takes a long time to replace the bearing. Utility Model Content

[0004] The utility model aims to provide a bearing with outer ring knurling and plastic coating to solve the problems raised in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the utility model provides an outer ring knurled plastic-coated bearing, including a bearing body, the bearing body is composed of a bearing outer ring, a ball and a bearing inner ring, the bearing outer ring is sleeved on the outer surface of the bearing inner ring, the ball is slidably arranged between the bearing outer ring and the bearing inner ring, the bearing outer ring includes a main ring frame, both sides of the main ring frame are circumferentially provided with a group of knurled parts, each group of knurled parts is provided with a plurality of parts, and auxiliary ring frames are fixedly inserted on both sides of the main ring frame, and the auxiliary ring frames are inserted in the main ring frame for fixing the knurled parts.

[0006] Furthermore, the inner walls on both sides of the main ring frame are provided with multiple grooves equidistantly around the circumference, and the knurled parts can be inserted into the grooves. The inner surface of the secondary ring frame is fixedly connected to the snap ring, and the inner walls on both sides of the main ring frame are provided with ring grooves, and the snap ring can be inserted into the ring grooves.

[0007] Furthermore, both ends of the knurled part are fixedly connected to ear frames, and when the ear frames are inserted into the slot, cavities are left at the upper and lower ends of the slot, the cavity at the upper end of the slot is a slide groove, and the cavity at the lower end of the slot is an expansion groove, and heat-expandable material is arranged in the expansion groove, and the inner wall of the slot is also fixedly connected to a deformable extrusion block.

[0008] Furthermore, the ear frame is a groove plate, and the extrusion block can be inserted into the recess of the ear frame.

[0009] Furthermore, a contraction groove is provided inside the extrusion block, and the extrusion block is a stainless steel elastic sheet.

[0010] Furthermore, the volume of the extrusion block is smaller than the volume of the recessed portion of the ear frame.

[0011] Furthermore, the depth of the slide groove does not exceed one millimeter.

[0012] Furthermore, the heat expandable material in the expansion groove may be selected from aluminum alloy and alloy steel.

[0013] Compared with the prior art, the beneficial effects of the utility model are: by designing the main ring frame, inner ring frame, knurled parts, retaining rings, ring grooves and retaining grooves, after the knurled parts are worn, the bearing body needs to be replaced without removing the bearing body sleeved on the shaft rod. Instead of replacing the entire bearing body, the knurled parts of the bearing body are directly replaced. There is no need to remove the entire bearing body, and the normal operation of the bearing body can be guaranteed, which saves time and makes it more convenient to replace the knurled parts.

[0014] By designing the knurled parts, expansion grooves, ear frames, extrusion blocks and thermal expansion materials, the knurled parts extend out of the bearing body during use, and the wear of the knurled parts is reduced by the wear of the bearing body, thereby increasing the service life of the bearing body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is an exploded view of the overall structure of the bearing body of the utility model;

[0017] Figure 3 A side view schematic diagram of the bearing body of the utility model with the auxiliary ring frame removed;

[0018] Figure 4 For the utility model Figure 3 A magnified view of the structure in the middle.

[0019] In the figure: 1. bearing body; 2. bearing outer ring; 3. ball; 4. bearing inner ring; 5. main ring frame; 6. knurled part; 7. secondary ring frame; 8. ear frame; 9. slot; 10. slide slot; 11. expansion slot; 12. extrusion block; 13. contraction slot; 14. ring groove; 15. retaining ring. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-4 The utility model provides an outer ring knurled plastic-coated bearing, comprising a bearing body 1, the bearing body 1 is composed of a bearing outer ring 2, a ball 3 and a bearing inner ring 4, the bearing outer ring 2 is sleeved on the outer surface of the bearing inner ring 4, the ball 3 is slidably arranged between the bearing outer ring 2 and the bearing inner ring 4, the bearing outer ring 2 comprises a main ring frame 5, both sides of the main ring frame 5 are circumferentially provided with a group of knurled pieces 6, each group of knurled pieces 6 is provided with a plurality of, and both sides of the main ring frame 5 are also fixedly inserted with secondary ring frames 7, the secondary ring frames 7 are inserted in the main ring frame 5 for fixing the knurled pieces 6.

[0022] The inner walls on both sides of the main ring frame 5 are provided with multiple grooves 9 at equal intervals around the circumference, and the knurled parts 6 can be inserted into the grooves 9. The inner surface of the secondary ring frame 7 is fixedly connected to the snap ring 15. The inner walls on both sides of the main ring frame 5 are provided with ring grooves 14, and the snap ring 15 can be inserted into the ring grooves 14.

[0023] When the bearing body 1 is used for a long time, as the knurled part 6 of the bearing body 1 rubs against the belt, the knurled part 6 wears out, and the bearing body 1 needs to be replaced. At this time, there is no need to remove the bearing body 1 sleeved on the shaft rod. Use a tool to remove the secondary ring frame 7 on the bearing body 1 from the main ring frame 5, and then remove the knurled part 6 in the slot 9, replace it with a new knurled part 6, and then insert the knurled part 6 into the slot 9, align the snap ring 15 on the secondary ring frame 7 with the snap ring 15 on the main ring frame 5, and the knurled part 6 can be replaced. By replacing the knurled part 6 of the bearing body 1, instead of replacing the entire bearing body 1, there is no need to remove the entire bearing body 1, and the normal operation of the bearing body 1 can be guaranteed, which saves time and is more convenient to replace the knurled part 6.

[0024] See also Figures 1 to 4 The two ends of the knurled part 6 are fixedly connected to the ear frames 8. When the ear frames 8 are inserted into the slot 9, cavities are left at the upper and lower ends of the slot 9. The cavity at the upper end of the slot 9 is a slide groove 10, and the cavity at the lower end of the slot 9 is an expansion groove 11. The expansion groove 11 is provided with a heat-expandable material. The inner wall of the slot 9 is also fixedly connected to a deformable extrusion block 12.

[0025] The ear frame 8 is a groove plate, and the extrusion block 12 can be inserted into the recess of the ear frame 8 .

[0026] A contraction groove 13 is provided inside the extrusion block 12 , and the extrusion block 12 is a stainless steel elastic sheet.

[0027] The volume of the extrusion block 12 is smaller than the volume of the recessed portion of the ear frame 8 .

[0028] When the bearing body 1 is in use, as the knurled piece 6 rubs against the belt, the temperature of the entire knurled piece 6 will increase. At this time, the heat-expandable material located in the expansion groove 11 will expand, squeezing the ear block of the knurled piece 6, causing the ear block to move toward the outer end of the slide groove 10. The ear block will move with the knurled piece 6, and then the ear block will squeeze the extrusion block 12 to deform the extrusion block 12. Due to the design of the shrinkage groove 13, the extrusion block 12 will shrink into a flat shape. At this time, the knurled piece 6 will squeeze the belt. The faster the speed of the bearing body 1 and the higher the temperature, the greater the friction between the knurled piece 6 and the belt (the friction formula is Fn=μ*F), thereby reducing the occurrence of slipping. The design of the knurled piece 6 being able to extend out of the bearing can reduce the wear of the bearing body 1 with the wear of the knurled piece 6, thereby increasing the service life of the bearing body 1.

[0029] See also Figure 4 , the depth of the chute 10 does not exceed one millimeter.

[0030] Avoid the knurled member 6 moving too far out of the bearing body 1, which will cause the belt to fail to contact the surface of the bearing body 1, damage the belt, and cause greater wear on the knurled member 6.

[0031] See also Figure 4 The thermal expansion material in the expansion groove 11 can be selected from aluminum alloy and alloy steel.

[0032] Aluminum alloy and steel alloy still have thermal expansion under high temperature conditions, and because both are solid, the expansion rate will not be too large, resulting in excessive pressure on the ear block and the extrusion block 12, thereby reducing the possibility of the extrusion block 12 being damaged and losing its elasticity.

[0033] Working principle: When the bearing body 1 is in use, as the knurled part 6 rubs against the belt, the temperature of the entire knurled part 6 will increase. At this time, the heat-expandable material located in the expansion groove 11 will expand, squeezing the ear block of the knurled part 6, causing the ear block to move toward the outer end of the slide groove 10. When the ear block moves, it will move with the knurled part 6, and then the ear block will squeeze the extrusion block 12 to deform the extrusion block 12. Due to the design of the shrinkage groove 13, the extrusion block 12 will shrink into a flat shape. At this time, the knurled part 6 will squeeze the belt. The faster the speed of the bearing body 1 and the higher the temperature, the greater the friction between the knurled part 6 and the belt, thereby reducing the occurrence of slipping. The design of the knurled part 6 being able to extend out of the bearing can reduce the wear of the bearing body 1 with the wear of the knurled part 6, thereby increasing the service life of the bearing body 1.

Claims

1. An outer ring knurled plastic-coated bearing, comprising a bearing body (1), wherein the bearing body (1) is composed of a bearing outer ring (2), a ball (3) and a bearing inner ring (4), wherein the bearing outer ring (2) is sleeved on the outer surface of the bearing inner ring (4), and the ball (3) is slidably arranged between the bearing outer ring (2) and the bearing inner ring (4). Features: The bearing outer ring (2) comprises a main ring frame (5), and a group of knurled pieces (6) are circumferentially arranged on both sides of the main ring frame (5), and each group of knurled pieces (6) is provided with a plurality of pieces. Auxiliary ring frames (7) are also fixedly inserted on both sides of the main ring frame (5), and the auxiliary ring frames (7) are inserted in the main ring frame (5) for fixing the knurled pieces (6).

2. The outer ring knurled plastic-coated bearing according to claim 1, characterized in that: The inner walls on both sides of the main ring frame (5) are provided with a plurality of slots (9) at equal intervals around the circumference, and the knurled parts (6) can be inserted into the slots (9). The inner surface of the secondary ring frame (7) is fixedly connected to a snap ring (15), and the inner walls on both sides of the main ring frame (5) are provided with annular grooves (14), and the snap ring (15) can be inserted into the annular grooves (14).

3. The outer ring knurled plastic-coated bearing according to claim 2, characterized in that: Both ends of the knurled member (6) are fixedly connected to ear frames (8); when the ear frames (8) are inserted into the slot (9), cavities are left at both upper and lower ends of the slot (9); the cavity at the upper end of the slot (9) is a slide groove (10); the cavity at the lower end of the slot (9) is an expansion groove (11); a heat-expandable material is provided in the expansion groove (11); and the inner wall of the slot (9) is also fixedly connected to a deformable extrusion block (12).

4. The outer ring knurled plastic-coated bearing according to claim 3, characterized in that: The ear frame (8) is a grooved plate, and the extrusion block (12) can be inserted into a recessed portion of the ear frame (8).

5. The outer ring knurled plastic-coated bearing according to claim 4, characterized in that: A contraction groove (13) is provided inside the extrusion block (12), and the extrusion block (12) is a stainless steel elastic sheet.

6. The outer ring knurled plastic-coated bearing according to claim 4, characterized in that: The volume of the extrusion block (12) is smaller than the volume of the recessed portion of the ear frame (8).

7. The outer ring knurled plastic-coated bearing according to claim 3, characterized in that: The depth of the slide groove (10) does not exceed one millimeter.

8. The outer ring knurled plastic-coated bearing according to claim 3, characterized in that: The thermally expandable material in the expansion groove (11) may be aluminum alloy or alloy steel.

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