A high speed light load type rotary bearing assembly

Abstract

The present disclosure relates to a high-speed light-load rotary bearing assembly, comprising a base, a bearing body, a limiting structure and a rotary cap; the base comprises a base plate, a mounting step and a mounting shaft in sequence, the bearing body is transitionally or gap-fitted on the mounting shaft and seated on the mounting step; the limiting structure is connected to the mounting shaft and clamps the outer end of the inner ring of the bearing body; the rotary cap is sleeved outside the bearing body, and there is a gap between the bottom end of the rotary cap and the base plate. The bearing of the rotary bearing assembly is low-resistance mounted on the base, which can prevent the size change of the bearing structure, fundamentally improve the product yield, the bearing limiting is realized by limiting nails or riveting limiting flanges, the bearing assembly is convenient to assemble and simple in structure; the base and the limiting nails for bearing support and limiting are made of plastic material, which significantly reduces the production cost of the bearing assembly and can buffer the impact force of the product; or the thin-walled end of the metal base is riveted and limited, which reduces the number of components and improves the assembly efficiency.

Description

Technical Field

[0001] This disclosure relates to the field of bearing technology, and more specifically, to a high-speed, light-load rotary bearing assembly. Background Technology

[0002] Rotary bearing assemblies are commonly used in light-load applications such as jewelry, toys, and household goods. Different parts of the product are connected to the base and top cap of the rotary bearing assembly, which causes them to rotate relative to each other, creating a dynamic visual effect. This can enhance the functionality, fun, and aesthetics of the product, satisfying those who pursue individuality and fashionable lifestyles. The existing assembly methods for rotary bearing assemblies include extrusion assembly and riveting assembly. The yield rate of rotary bearing products using these two methods is insufficient and the production cost is high. The reason is that for rotary bearing assemblies with extrusion assembly structure, the bearing is interference-fitted onto the mounting shaft of the metal base. Due to the high hardness of the base, the inner diameter of the bearing is easily changed during the extrusion assembly process, resulting in the finished bearing assembly rotating poorly or even not rotating at all.

[0003] Therefore, this design proposes a high-speed, light-load rotary bearing assembly with high finished product yield.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0005] The purpose of this disclosure is to provide a high-speed, light-load rotary bearing assembly that overcomes, at least to some extent, one or more problems caused by limitations and defects in related technologies.

[0006] According to one aspect of this disclosure, a high-speed, light-load rotary bearing assembly is provided, including a base, a bearing body, a limiting structure, and a rotary cap. The base consists of a chassis, a mounting step, and a mounting shaft. The bearing body is fitted onto the mounting shaft with transition or clearance and sits on the mounting step. The limiting structure connects to the mounting shaft and locks the outer end of the inner ring of the bearing body; The rotating cap is mounted on the bearing body and is used to generate rotation relative to the base. There is a gap between the bottom end of the rotating cap and the base.

[0007] In one exemplary embodiment of this disclosure, the limiting structure is a riveted limiting flange, the base is made of metal, and a tapered riveting process hole is provided on the end face of the mounting shaft to form a thin-walled ring located at the end edge of the mounting shaft and extending out of the end face of the inner ring of the bearing body after installation. The thin-walled ring is riveted to form a riveted limiting flange for limiting the bearing body.

[0008] In one exemplary embodiment of this disclosure, the limiting structure is a limiting pin. The base and the limiting pin are made of hard plastic or semi-hard plastic. A positioning hole is provided through the center of the base. The limiting pin includes a positioning shaft and a limiting head. The limiting head is located at the outer end of the positioning shaft. The positioning shaft is detachably installed on the positioning hole for fixing the limiting pin. The limiting head is against the outer end of the inner ring of the bearing body for blocking and preventing the bearing body from loosening.

[0009] In one exemplary embodiment of this disclosure, the positioning shaft is interference-fitted or threadedly connected to the positioning hole.

[0010] In one exemplary embodiment of this disclosure, the bearing body is seated in the rotating cap mounting groove, and a clearance groove is provided in the middle of the bottom of the mounting groove.

[0011] In one exemplary embodiment of this disclosure, the mounting groove is interference-fitted with the outer ring of the bearing body.

[0012] In one exemplary embodiment of this disclosure, the rotating cap is made of metal or rigid plastic.

[0013] An exemplary embodiment of this disclosure provides a high-speed, light-load rotary bearing assembly in which the bearing is mounted on a base with low resistance, eliminating the need for extrusion pressure, preventing changes in the bearing's structural dimensions, and fundamentally improving the product yield. The bearing is positioned by a limiting pin connected to the base or by a riveted limiting flange on the end edge of the base. The bearing assembly is quick and easy to assemble, and the overall structure is simple. Limit pins are used for positioning. The bearing support and the base for positioning, as well as the limit pins, are all made of plastic, which reduces the production cost of the bearing assembly and can buffer the impact force of the product. The thin-walled edge of the metal base is riveted for positioning, resulting in fewer components and efficient assembly.

[0014] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0015] The above and other features and advantages of this disclosure will become more apparent from the detailed description of exemplary embodiments thereof with reference to the accompanying drawings.

[0016] Figure 1 A general sectional view of the rotary bearing assembly in Embodiment 1 is shown.

[0017] Figure 2 A general sectional view of the rotary bearing assembly in Embodiment 2 is shown.

[0018] Attached image labels: 100. Rotating cap; 120. Clearance groove; 130. Mounting groove; 200. Base; 210. Chassis; 220. Mounting step; 230. Positioning hole; 240. Mounting shaft; 250. Riveting process hole; 260. Riveting limit flange; 300. Limiting pin; 310. Limiting head; 320. Positioning shaft; 400. Bearing body. Detailed Implementation

[0019] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted.

[0020] Example 1: This example embodiment provides a high-speed, light-load rotary bearing assembly, such as... Figure 1 As shown, the product includes a base 200, a bearing body 400, a limiting pin 300, and a rotating cap 100. The outer surfaces of the base 200's chassis 210 and the rotating cap 100 are respectively used to connect two relatively rotating parts of the product; wherein, The base 200 can be made of rigid plastic or semi-rigid plastic depending on the load strength requirements. The base 200 includes, from bottom to top, a chassis 210, a mounting step 220 and a mounting shaft 240. The inner ring of the bearing body 400 is in transition or clearance fit with the mounting shaft 240. The bearing body 400 can be fitted onto the mounting shaft 240 without extrusion, which can avoid the bearing structure being damaged by extrusion force and improve the yield of assembled products from a structural point of view. The bearing body 400 is seated on the mounting step 220, and the outer ring of the bearing body 400 is separated from the chassis 210. The limiting pin 300 is fixed to the mounting shaft 240, and the bearing body 400 is secured by the limiting head 310 at the end. The fixed connection can be achieved through threaded connection, snap-fit ​​connection, or other connection methods. Since the rotary bearing assembly is mainly used in light-load applications, the primary focus is on its low-friction, high-speed rotation performance. The connection between the limiting pin 300 and the mounting shaft 240 does not affect the bearing performance. In this example embodiment, an interference fit is preferred. Both the base 200 and the limiting pin 300 are made of rigid or semi-rigid plastic, which can be selected according to the application scenario. The center of the base 200... The positioning shaft 320, which has a positioning hole 230 and a limit pin 300, is press-fitted into the positioning hole 230 through an extrusion process. The plastic material combined with the interference fit also has the function of protecting the product and buffering impact. When the force is large, the positioning shaft 320 can be disengaged from the positioning hole 230 to prevent damage to the product. Of course, a threaded connection can also be used to improve the connection strength between the two. The positioning hole 230 has an internal thread, the positioning shaft 320 has an external thread, and the limit head 310 is provided with a standard operating groove, such as a cross, slotted, or internal hexagonal groove. The limiting head 310 is located at the outer end of the positioning shaft 320 and is attached to the outer end face of the inner ring of the bearing body 400. The positioning hole 230 fixes the positioning shaft 320 by tight-fitting friction or thread fastening force, so that the limiting head 310 stably blocks the inner ring of the bearing body 400 and prevents the bearing body 400 from loosening during relative rotation. The rotating cap 100 is sleeved outside the bearing body 400 and can rotate relative to the base 200. In order to reduce rotational friction, there is a gap between the bottom end of the rotating cap 100 and the base 210.

[0021] In an exemplary embodiment of this disclosure, the bearing body 400 is seated at the bottom of the mounting groove 130 of the rotating cap 100. To avoid relative rotational friction between the disc surface of the limiting head 310 and the bottom of the mounting groove 130, a clearance groove 120 is provided in the middle of the bottom of the mounting groove 130. In addition, to prevent the rotating cap 100 from loosening, the outer ring of the bearing body 400 is interference-fitted into the mounting groove 130, forming a synchronous rotation structure with the rotating cap 100. This prevents the rotating cap 100 from being misaligned due to uneven load, thus affecting the rotation performance. In this embodiment, the rotating cap 100 is preferably made of metal and is used to embed or bond the rotatable parts of the product and provide a certain support strength. Of course, in applications requiring low load or high noise reduction, the rotating cap 100 can also be made of hard plastic.

[0022] Example 2: This example embodiment provides yet another high-speed, light-load rotary bearing assembly, such as... Figure 2 As shown, the base 200 is made of metal and uses an integrated riveted limiting flange 260 as a limiting structure; The existing mounting shaft 240 is a cylindrical structure. The cylindrical surface extending out of the bearing body 400 is riveted to form a flange for limiting. However, the base 200 of this type of structure is prone to over-riveting when the riveting pressure is slightly high, causing the bearing body 400 to rotate and get stuck. Therefore, in order to overcome this problem, a tapered riveting process hole 250 is opened at the end of the mounting shaft 240. In this way, a thin-walled structure is formed only at the end edge extending out of the inner ring end face of the bearing body 400. The riveting pressure increases with the increase of the wall thickness, which can fundamentally prevent over-riveting. The thin-walled ring extending out of the inner ring end face of the bearing body is riveted and deformed to form a riveted limiting flange 260 with high consistency, which blocks and limits the inner ring of the bearing body 400, preventing the bearing body 400 from loosening and ensuring its smooth rotation. Understandable and referable Figure 2 The bearing assembly structure shown in this embodiment only describes the technical parts that are replaceable or different from those in Embodiment 1. The remaining structures can be referred to the design of Embodiment 1, and will not be described in detail in this embodiment.

[0023] The directional words such as "side," "end," "inner," and "outer" mentioned in this article are based on... Figure 1 and Figure 2 The orientation or positional relationship shown in the corresponding figures refers to the orientation or positional relationship in the state of use or in motion. These terms are primarily used to better describe the invention and its embodiments and are not intended to limit the indicated device, element, or component to having a particular orientation or to be constructed and operated in a particular orientation.

[0024] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the claims.

[0025] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A high-speed, light-load rotary bearing assembly, characterized in that: Includes base, bearing body, limiting structure and rotating cap; The base includes a chassis, a mounting step, and a mounting shaft in sequence. The bearing body is fitted to the mounting shaft with transition or clearance and sits on the mounting step. The limiting structure is connected to the mounting shaft and locks the outer end of the inner ring of the bearing body; The rotating cap is fitted onto the bearing body and is used to generate rotation relative to the base. There is a gap between the bottom end of the rotating cap and the chassis.

2. The high-speed, light-load rotary bearing assembly as described in claim 1, characterized in that: The limiting structure is a riveted limiting flange. The base is made of metal. A tapered riveting process hole is opened on the end face of the mounting shaft to form a thin-walled ring located at the end of the mounting shaft and extending out of the inner ring end face of the bearing body after installation. The thin-walled ring is riveted to form the riveted limiting flange for limiting the bearing body.

3. The high-speed, light-load rotary bearing assembly as described in claim 1, characterized in that: The limiting structure is a limiting pin. The base and the limiting pin are made of rigid plastic or semi-rigid plastic. A positioning hole is provided through the center of the base. The limiting pin includes a positioning shaft and a limiting head. The limiting head is located at the outer end of the positioning shaft. The positioning shaft is detachably installed on the positioning hole to fix the limiting pin. The limiting head is against the outer end of the inner ring of the bearing body to prevent the bearing body from loosening.

4. The high-speed, light-load rotary bearing assembly as described in claim 3, characterized in that: The positioning shaft is either interference-fitted to the positioning hole or threaded.

5. The high-speed, light-load rotary bearing assembly as described in any one of claims 2 to 4, characterized in that: The bearing body is seated in the mounting groove of the rotating cap, and a clearance groove is provided in the middle of the bottom of the mounting groove.

6. The high-speed, light-load rotary bearing assembly as described in claim 5, characterized in that: The mounting groove is interference-fitted with the outer ring of the bearing body.

7. The high-speed, light-load rotary bearing assembly as described in claim 6, characterized in that: The rotating cap is made of metal or hard plastic.

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