Bearing mounting structure of steering column bowl group

Abstract

The utility model relates to a bearing mounting structure of a steering column bowl group. The bearing mounting structure comprises a bearing body, an oil seal, a bottom baffle and a headstock pipe, the bearing body is fixedly connected to the inner side of the bottom of the bicycle head pipe in an embedded mode, the bearing body comprises a bearing outer ring and a bearing inner ring arranged on the inner side of the bearing outer ring, a pin roller is rotationally arranged between the bearing outer ring and the bearing inner ring, and the bottom of the bearing outer ring is higher than the bottom of the bearing inner ring; the oil seal is connected to the outer side of the bottom of the bearing inner ring in a sleeving mode and is sealed between the bearing inner ring and a headstock pipe. The bottom block is connected to the bottom of the oil seal, and the top of the bottom block abuts against the bottom of the oil seal and the bottom of the bearing inner ring. According to the utility model, the bearing structure with the high outer ring and the low inner ring is adopted, so that the inner ring of the bearing is in direct contact with the bottom baffle, the position of the inner ring of the bearing is ensured not to deviate, and the rotating smoothness of the bearing is ensured.

Description

Technical Field

[0001] This utility model relates to a bearing mounting structure for a steering column cup assembly, belonging to the field of bearing mounting technology. Background Technology

[0002] In bicycles and motorcycles, the headset assembly is mainly used to connect the steering column tube to the head tube of the frame and allow the steering column to rotate freely, thus enabling the front wheel to steer. This requires the use of bearings. For example, the prior art "Application No.: CN2023231900877" discloses an internally routed steering column headset assembly, which includes a head tube 1, an upper headset assembly 2 pressed into the upper end of the head tube 1, and a lower headset assembly 3 pressed into the lower end of the head tube 1. The lower headset assembly 3 includes a bottom stop 31, a lower headset bearing 32, and a lower headset 33. The bottom stop 31 is fixedly connected to the steering column shoulder cover 41. The steering column riser 42 is installed on the steering column shoulder cover 41. The lower headset bearing 32 is sleeved on the bottom stop 31, and the lower headset 33 is sleeved on the lower headset bearing 32 and pressed into the lower end of the head tube 1, so that the entire lower headset assembly 3 is pressed into the lower end of the head tube 1.

[0003] To improve the dust and water resistance of the bearing and prevent damage caused by oxidation, rust, or the ingress of dirt and sand to its internal roller structure, an oil seal is usually installed between the bearing and the underbody. The oil seal is typically made of flexible sealing materials such as rubber. Since the weight of the steering column headset is mainly transmitted to the steering column shoulder through the inner ring of the bearing and the underbody, the oil seal, after being subjected to pressure for a long time, will deform to varying degrees in different parts. This causes the inner ring of the bearing to shift (i.e., the axis of the inner ring and the axis of the outer ring are not on the same axis), compressing the rollers and affecting the smoothness of the bearing's rotation.

[0004] Therefore, the research objective of this utility model is to provide a steering column cup bearing mounting structure that can ensure smooth rotation and is dustproof and waterproof. Utility Model Content

[0005] To address the shortcomings of the aforementioned technologies, this utility model provides a bearing mounting structure for a steering column headset. It employs a bearing structure with a high outer ring and a low inner ring, allowing the inner ring to directly contact the bottom plate, ensuring that the inner ring's position does not shift and thus guaranteeing smooth bearing rotation. Furthermore, an oil seal is installed between the head tube and the inner ring to prevent oxidation, rust, or sand ingress that could damage the roller structure between the outer and inner rings, thereby ensuring the bearing's dustproof and waterproof performance.

[0006] To solve the problems of the existing technology, the technical solution adopted by this utility model is as follows:

[0007] A bearing mounting structure for a steering column headset includes a bearing body, an oil seal, a bottom stop, and a head tube. The bearing body is embedded and fixedly connected to the inner side of the bottom of the head tube. The bearing body includes an outer bearing ring and an inner bearing ring disposed inside the outer bearing ring. Rollers are rotatably provided between the outer bearing ring and the inner bearing ring. The bottom of the outer bearing ring is higher than the bottom of the inner bearing ring. The oil seal is sleeved on the outer side of the bottom of the inner bearing ring and seals between the inner bearing ring and the head tube. The bottom stop is connected to the bottom of the oil seal, and the top of the bottom stop abuts against the bottom of the oil seal and the inner bearing ring.

[0008] Furthermore, the bottom of the front tube extends to be flush with the bottom of the underbody, and a bearing sleeve is provided between the front tube and the bearing body. The bearing sleeve is embedded and fixedly connected to the inner side of the bottom of the front tube, and the bearing body is embedded and fixedly connected to the inner side of the bearing sleeve.

[0009] Furthermore, the oil seal has an inner ring that mates with the inner ring of the bearing, and the outer side of the oil seal has a first tip and a second tip along its circumference. The top of the second tip has a third tip that protrudes upward. The first tip and the second tip abut against the inner side of the head tube, and the third tip abuts against the bottom of the outer ring or outer sleeve of the bearing.

[0010] Furthermore, the oil seal has an inner ring that mates with the inner ring of the bearing, and a first tip is provided on the outer side of the oil seal along its circumference. The top of the first tip has a third tip that protrudes upward. The first tip abuts against the inner side of the head tube, and the third tip abuts against the bottom of the outer ring or outer sleeve of the bearing.

[0011] Furthermore, the bottom of the oil seal is provided with a protruding retaining ring along its circumference, and the top of the bottom stop is provided with a retaining groove that mates with the retaining ring. The oil seal is fixedly connected to the top of the bottom stop through the snapping engagement between the retaining ring and the retaining groove.

[0012] Furthermore, the bottom stop is provided with a through hole in the middle for the steering column riser to pass through, and the inner diameter of the through hole is larger than the inner diameter of the bearing inner ring.

[0013] Furthermore, the bottom stop is provided with a raised step in the middle, the step is arranged around the through hole and abuts against the bottom of the bearing inner ring, and the inner ring of the oil seal is sleeved on the outside of the step and / or the bottom of the bearing inner ring.

[0014] The beneficial effects of this utility model are: 1. The bearing structure with a high outer ring and a low inner ring allows the inner ring of the bearing to directly contact the bottom stop, ensuring that the position of the inner ring of the bearing will not shift, thereby ensuring the smooth rotation of the bearing; 2. An oil seal is installed between the head tube and the inner ring of the bearing, preventing the roller structure between the outer and inner rings of the bearing from being oxidized, rusted, or damaged by mud and sand, thus ensuring the dustproof and waterproof effect of the bearing; 3. Multiple sets of tips are provided on the oil seal, which further improves the dustproof and waterproof effect of the oil seal on the bearing and also prevents the loss of bearing lubricating oil, ensuring the lubrication and durability of the bearing; 4. The bearing components, such as the bearing outer sleeve, bearing body, oil seal, and bottom stop, are hidden and installed on the inner side of the bottom of the head tube, improving the aesthetic effect of the bearing installation structure. Attached Figure Description

[0015] Figure 1 This is an exploded view of the structure of Embodiment 1 of this utility model.

[0016] Figure 2 This is a partial sectional view of Embodiment 1 of this utility model.

[0017] Figure 3 This is a schematic diagram of the bearing body and oil seal in Embodiment 1 of this utility model.

[0018] Figure 4 This is a schematic diagram of the bearing body according to Embodiment 1 of this utility model.

[0019] Figure 5 This is one of the structural schematic diagrams of the oil seal in Embodiment 1 of this utility model.

[0020] Figure 6 This is the second schematic diagram of the structure of the oil seal in Embodiment 1 of this utility model.

[0021] Figure 7 This is a schematic diagram of the structure of the bottom stop in Embodiment 1 of this utility model.

[0022] Figure 8 This is a partial cross-sectional view of Embodiment 2 of this utility model.

[0023] Figure 9 This is a partial cross-sectional view of Embodiment 3 of this utility model.

[0024] The components include: bearing body 1, oil seal 2, bottom stop 3, head tube 4, bearing outer sleeve 5, bearing outer ring 101, bearing inner ring 102, roller 103, inner ring 201, first tip 202, second tip 203, third tip 204, retaining ring 205, retaining groove 301, through hole 302, and step 303. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solution of this utility model, the following description is provided in conjunction with the appendix. Figure 1-9 Further analysis of this utility model is then conducted. Example

[0026] like Figure 1-7 As shown, a bearing mounting structure for a steering column headset includes a bearing body 1, an oil seal 2, a bottom stop 3, and a head tube 4. The bearing body 1 is embedded and fixedly connected to the inner side of the bottom of the head tube 4. The bearing body 1 includes an outer bearing ring 101 and an inner bearing ring 102 disposed inside the outer bearing ring 101. Rollers 103 are rotatably disposed between the outer bearing ring 101 and the inner bearing ring 102. The bottom of the outer bearing ring 101 is set higher than the bottom of the inner bearing ring 102, so that the bottom of the outer bearing ring 101 and the bottom of the inner bearing ring 102 form a height difference, which is used to adjust the steering column. Install oil seal 2; oil seal 2 is sleeved on the outside of the bottom of the bearing inner ring 102 and seals between the bearing inner ring 102 and the head tube 4. It is used to waterproof and dustproof the roller structure between the bearing outer ring 101 and the bearing inner ring 102, preventing oxidation, rust, or damage caused by the entry of mud and sand; bottom stop 3 is connected to the bottom of oil seal 2, and the top of bottom stop 3 abuts against the bottom of oil seal 2 and bearing inner ring 102, so that bearing inner ring 102 is in direct contact with bottom stop 3, ensuring that the position of bearing inner ring 102 will not shift, thereby ensuring the smoothness of bearing rotation.

[0027] In this embodiment, preferably, the bottom of the front tube 4 extends to be flush with the bottom of the bottom stop 3, and the bearing components such as the bearing sleeve 5, bearing body 1, oil seal 2 and bottom stop 3 are hiddenly installed on the inner side of the bottom of the front tube 4, which improves the aesthetic effect of the bearing installation structure; a bearing sleeve 5 is also provided between the front tube 4 and the bearing body 1, the bearing sleeve 5 is embedded and fixedly connected to the inner side of the bottom of the front tube 4, and the bearing body 1 is embedded and fixedly connected to the inner side of the bearing sleeve 5.

[0028] In this embodiment, preferably, the oil seal 2 has an inner ring 201 that mates with the inner ring 102 of the bearing inside, and a first tip 202 and a second tip 203 are provided on the outer side of the oil seal 2 along its circumference. The top of the second tip 203 has a third tip 204 that protrudes upward. The first tip 202 and the second tip 203 abut against the inner side of the head tube 4 to prevent external mud and water from entering the bearing body 1 from the inside of the head tube 4. The third tip 204 abuts against the bottom of the outer ring 101 of the bearing or the outer sleeve 5 of the bearing to further prevent external mud and water from entering the bearing body 1, thus providing multiple dustproof and waterproof effects.

[0029] In this embodiment, preferably, the bottom of the oil seal 2 is provided with a protruding retaining ring 205 along its circumference, and the top of the bottom stop 3 is provided with a retaining groove 301 that cooperates with the retaining ring 205. The oil seal 2 is fixedly connected to the top of the bottom stop 3 through the clamping cooperation between the retaining ring 205 and the retaining groove 301, which not only further improves the sealing performance between the oil seal 2 and the bottom stop 3, but also enables the oil seal 2 and the bottom stop 3 to remain concentric, making installation more convenient.

[0030] In this embodiment, preferably, the bottom stop 3 has a through hole 302 in the middle for the steering column riser to pass through. The inner diameter of the through hole 302 is larger than the inner diameter of the bearing inner ring 102, so that the steering column riser can pass through the through hole 302 and rotate within the through hole 302. The outer side of the steering column riser is interference-fitted with the inner side of the bearing inner ring 102. The rotation of the bearing inner ring 102 within the bearing body 1 drives the steering column riser to rotate, thereby achieving the steering of the bicycle. Example

[0031] The main difference between this embodiment two and embodiment one is that: Figure 8 As shown, the oil seal 2 has only a first tip 202 on its outer side along its circumference. Example

[0032] The main difference between this embodiment three and embodiment one is that: Figure 9 As shown, the bottom stop 3 is also provided with a raised step 303 in the middle. The step 303 is arranged around the through hole 302 and abuts against the bottom of the bearing inner ring 102. The function of the step 303 is to further improve the structural strength of the connection between the bottom stop 3 and the bottom of the bearing inner ring 102. The inner ring 201 of the oil seal 2 is sleeved on the outer side of the step 303 and / or the bottom of the bearing inner ring 102.

[0033] The specific working principle of this utility model is as follows: A bearing structure with a high outer ring and a low inner ring ensures direct contact between the inner ring 102 and the bottom stop 3, preventing any shift in the position of the inner ring 102 and guaranteeing smooth bearing rotation. Furthermore, an oil seal 2 is installed between the head tube 4 and the inner ring 102 to prevent oxidation, rust, or damage from dirt and sand entering the roller structure between the outer ring 101 and the inner ring 102, thus ensuring the bearing's dustproof and waterproof effect. During installation, the bearing body 1 is fixedly connected to the head tube 4 via the bearing outer sleeve 5. The steering column riser is then passed sequentially through the bottom stop 3, the bearing body 1, and the head tube 4 before being fixedly connected to the handlebars and press-fitted with the inner ring 102. Rotating the handlebars causes the steering column riser to rotate within the bearing body 1, thus steering the bicycle.

[0034] The technical solutions provided in this application have been described in detail above. The embodiments used in this document illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the methods and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A bearing mounting structure for a steering column cup assembly, characterized in that: The device includes a bearing body, an oil seal, a bottom stop, and a head tube. The bearing body is embedded and fixedly connected to the inner side of the bottom of the head tube. The bearing body includes an outer bearing ring and an inner bearing ring disposed inside the outer bearing ring. Rollers are rotatably provided between the outer bearing ring and the inner bearing ring. The bottom of the outer bearing ring is higher than the bottom of the inner bearing ring. The oil seal is sleeved on the outer side of the bottom of the inner bearing ring and seals between the inner bearing ring and the head tube. The bottom stop is connected to the bottom of the oil seal, and the top of the bottom stop abuts against the bottom of the oil seal and the inner bearing ring.

2. The bearing mounting structure for a steering column cup assembly according to claim 1, characterized in that: The bottom of the head tube extends to be flush with the bottom of the underbody. A bearing sleeve is provided between the head tube and the bearing body. The bearing sleeve is embedded and fixedly connected to the inner side of the bottom of the head tube, and the bearing body is embedded and fixedly connected to the inner side of the bearing sleeve.

3. The bearing mounting structure for a steering column cup assembly according to claim 2, characterized in that: The oil seal has an inner ring that mates with the inner ring of the bearing. The outer side of the oil seal has a first tip and a second tip along its circumference. The top of the second tip has a third tip that protrudes upward. The first tip and the second tip abut against the inner side of the head tube, and the third tip abuts against the bottom of the outer ring or outer sleeve of the bearing.

4. The bearing mounting structure for a steering column cup assembly according to claim 2, characterized in that: The oil seal has an inner ring that mates with the inner ring of the bearing. The outer side of the oil seal has a first tip along its circumference. The top of the first tip has a third tip that protrudes upward. The first tip abuts against the inner side of the head tube, and the third tip abuts against the bottom of the outer ring or outer sleeve of the bearing.

5. A bearing mounting structure for a steering column cup assembly according to claim 3 or 4, characterized in that: The bottom of the oil seal has a protruding retaining ring along its circumference, and the top of the bottom block has a retaining groove that mates with the retaining ring. The oil seal is fixedly connected to the top of the bottom block through the snapping engagement between the retaining ring and the retaining groove.

6. The bearing mounting structure for a steering column cup assembly according to claim 2, characterized in that: The bottom stop has a through hole in the middle for the steering column riser to pass through, and the inner diameter of the through hole is larger than the inner diameter of the bearing inner ring.

7. The bearing mounting structure for a steering column cup assembly according to claim 6, characterized in that: The bottom stop is also provided with a raised step in the middle. The step is arranged around the through hole and abuts against the bottom of the bearing inner ring. The inner ring of the oil seal is sleeved on the outside of the step and / or the bottom of the bearing inner ring.

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