Injection molded bearing seat

Abstract

The application discloses an injection molding bearing seat, which comprises a bearing assembly part, an outer ring circular table used for contacting with bearing rollers is integrally connected to the inner wall of the bearing assembly part, an oil injection port is arranged on the outer wall of the bearing assembly part, and the oil injection port extends to the inner wall of the outer ring circular table through the bearing assembly part and the outer ring circular table.

Description

Technical Field

[0001] This utility model belongs to the field of bearing housings, and specifically relates to an injection-molded bearing housing. Background Technology

[0002] Bearing housings are crucial components in mechanical equipment, typically used in conjunction with bearings. Their primary function is to secure the outer ring of the bearing, ensuring stable relative movement between the outer ring and the internal rollers. Therefore, ensuring a tight connection between the bearing and the housing is critical during assembly. Traditionally, bearing housings are metal, and interference fits between the housing and bearing are achieved through heat or cold fitting. However, with the rapid development of the plastics industry, many high-strength plastic products possess some of the mechanical properties required for bearings. Furthermore, the low cost and ease of molding of plastic products have led to their increasing application in the bearing field. However, due to the high degree of deformation after heating, plastic products cannot be assembled with the bearing outer ring using the heat-fitting method found in metal bearing housings. Achieving a stable connection between injection-molded bearing housings and the bearing outer ring has become a challenge within the industry. Utility Model Content

[0003] To address the aforementioned issues, this application proposes an injection-molded bearing housing that directly integrates the bearing housing and the outer ring of the bearing into a single structure. The bearing rollers are directly connected to the inner wall of the integrated outer ring frustum, ensuring the stability between the outer ring frustum and the bearing housing.

[0004] The specific solution is as follows: an injection-molded bearing housing includes a bearing assembly part, the inner wall of which is integrally connected to an outer ring truncated cone for contacting bearing rollers, and the outer wall of the bearing assembly part is provided with an oil injection port, which extends through the bearing assembly part and the outer ring truncated cone to the inner wall of the outer ring truncated cone.

[0005] Preferably, the inner wall of the outer ring truncated cone is recessed inward to form a guide groove, which is provided through one end face of the outer ring truncated cone. The guide groove is used to straighten the assembled cage and rollers to enhance the stability of the roller rotation.

[0006] Preferably, the guide groove includes two groove walls that intersect with the outer ring truncated cone. The groove walls are inclined from the bottom of the groove towards the inner wall of the outer ring truncated cone, that is, the groove walls gradually transition from the bottom of the groove to the outer ring truncated cone, so that the roller rotates smoothly from the bottom of the groove to the inner wall of the outer ring truncated cone, thereby preventing the height difference from affecting the rotation of the roller.

[0007] Preferably, the inclination angle of the tank wall is in the range of 2°-5°.

[0008] Preferably, the projection shape of the bottom of the guide groove along the radial direction of the outer ring frustum is trapezoidal, and the length of the side located on the end face of the outer ring frustum is greater than that of the side not located on the end face of the outer ring frustum; that is, the two edges between the groove wall and the outer ring frustum extend outward from the center in a figure-eight shape. This setting facilitates demolding during production.

[0009] The inclined edges and inclined groove walls will generate an inward guiding effect when the roller rotates, so that even if there is a radial angle between the roller cage and the outer ring truncated cone after installation, the roller can be straightened by rotation, thus ensuring the stability of the roller rotation.

[0010] Preferably, the inner wall of the outer frustum is a spherical structure, and the outer frustum and the rollers and cage connected thereto are compatible.

[0011] Preferably, the outer wall of the bearing assembly part is also provided with at least two integrally formed fixing parts. The fixing parts are provided with fixing holes and metal bushings are provided in the fixing holes. The fixing bolts pass through the metal bushings to fix the bearing sleeve, so as to avoid damage to the fixing part during long-term use vibration, thereby compromising the stability of the bearing seat fixing.

[0012] Preferably, the inner wall of the outer ring truncated cone is smooth, with a surface roughness range of ra0.3-0.8. The smoother the surface, the less friction is generated by the rotation of the roller.

[0013] Preferably, the outer ring truncated cone is located in the middle of the bearing assembly part, and the bearing assembly part has sealing gaps on both sides of the outer ring truncated cone for mounting sealing gaskets. The sealing gaps are equipped with sealing gaskets to seal the bearing rollers, thereby reducing the external influence on the roller operation and preventing lubricating oil leakage.

[0014] The beneficial effects of this utility model are as follows:

[0015] (1) This utility model integrates the outer ring frustum, which is used to contact the bearing roller, with the inner wall of the bearing assembly part, thus avoiding the problem of insufficient stability of the split connection, meeting the bearing operation requirements, simplifying the assembly steps, and enhancing practicality.

[0016] (2) This utility model can use the guide groove to provide guidance for the roller during assembly, which improves the assembly accuracy, ensures the stability of the roller operation, and enhances the transmission effect of the bearing. Attached Figure Description

[0017] The accompanying drawings, which are provided to further illustrate this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application.

[0018] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model;

[0019] Figure 2 This is a bottom view of Embodiment 1 of the present utility model;

[0020] Figure 3 This is Embodiment 1 of the present utility model. Figure 2 AA section view;

[0021] Figure 4 This is a schematic diagram of the overall structure of Embodiment 2 of this utility model;

[0022] Figure 5 This is a schematic diagram of the overall structure of Embodiment 3 of this utility model;

[0023] In the attached drawings: 1-bearing assembly, 2-outer ring frustum, 3-oil inlet, 4-guide groove, 5-fixing part, 51-fixing hole, 52-metal bushing, 6-sealing gap. Detailed Implementation

[0024] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0026] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0027] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0028] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0029] Example 1

[0030] like Figure 1-3 As shown, an injection-molded bearing housing according to this embodiment includes a bearing assembly part 1. The inner wall of the bearing assembly part 1 is integrally connected to an outer ring frustum 2 for contacting the bearing rollers. The outer wall of the bearing assembly part 1 is also provided with four integrally formed fixing parts 5. The bearing assembly part 1, the outer ring frustum 2 and the fixing parts 5 are all injection molded from PA66 plastic material. Of course, other high-strength injection molding materials such as PUM can also be used. The four fixing parts 5 are arranged in an array along the axial direction of the bearing assembly part 1. The fixing parts 5 are provided with fixing holes 51, which are arranged facing the axial direction of the bearing assembly part 1. The outer wall of the bearing assembly part 1 is provided with an oil inlet 3, which extends through the bearing assembly part 1 and the outer ring frustum 2 to the inner wall of the outer ring frustum 2.

[0031] A metal bushing 52 is provided inside the fixing hole 51. The fixing bolt passes through the metal bushing 52 to fix the bearing sleeve, so as to avoid damage to the fixing point during long-term use and vibration, thereby compromising the stability of the bearing seat fixing.

[0032] The inner wall of the outer ring truncated cone 2 is recessed inward to form a guide groove 4. The guide groove 4 is set through one end face of the outer ring truncated cone 2. The guide groove 4 is used to straighten the assembled cage and roller to enhance the stability of the roller rotation.

[0033] The guide groove 4 includes two groove walls that intersect with the outer ring frustum 2. The groove walls slope from the bottom of the groove towards the inner wall of the outer ring frustum 2, that is, the groove walls gradually transition from the bottom of the groove to the outer ring frustum 2, so that the roller rotates smoothly from the bottom of the groove to the inner wall of the outer ring frustum 2, thereby preventing the height difference from affecting the rotation of the roller.

[0034] The inclination angle of the tank wall is within the range of 3°.

[0035] The bottom of the guide groove 4 is projected into a trapezoidal shape along the radial direction of the outer ring frustum 2. The side length located on the end face of the outer ring frustum 2 is greater than the side not located on the end face of the outer ring frustum 2. That is, the two edges between the groove wall and the outer ring frustum 2 extend outward from the center in a figure-eight shape. This setting facilitates demolding during production.

[0036] The inclined edges and inclined groove walls will generate an inward guiding effect when the roller rotates, so that even if there is a radial deviation between the roller cage and the outer ring truncated cone 2 after installation, the roller can be straightened by rotation, thus ensuring the stability of the roller rotation.

[0037] The inner wall of the outer ring frustum 2 is a spherical structure, and the outer ring frustum 2 and the rollers and cage connected thereto are compatible.

[0038] The inner wall of the outer ring truncated cone 2 is smoothly designed, and its surface roughness ranges from ra0.3. The smoother the surface, the less friction is generated by the rotation of the roller.

[0039] The outer ring frustum 2 is located in the middle of the bearing assembly part 1. The bearing assembly part 1 has sealing gaps 6 on both sides of the outer ring frustum 2 for mounting sealing gaskets. The sealing gaps 6 are equipped with sealing gaskets to seal the bearing rollers, thereby reducing the external influence on the roller operation and preventing the leakage of lubricating oil.

[0040] Example 2

[0041] like Figure 4 As shown, the difference between this embodiment and embodiment 1 is that in this embodiment, there are two fixing parts 5, which are distributed in a circumferential array along the bearing assembly part 1;

[0042] The inclination angle of the tank wall ranges from 5°.

[0043] The inner wall of the outer ring truncated cone 2 is smoothly provided, and its surface roughness ranges from Ra0.8.

[0044] Example 3

[0045] like Figure 5 As shown, the difference between this embodiment and embodiment 1 is that in this embodiment, there are two fixing parts 5, both of which are located on one side of the outer wall of the bearing assembly part 1, and the fixing holes 51 are arranged in the radial direction of the bearing assembly part 1.

[0046] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0047] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0048] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A type of injection-molded bearing housing, characterized in that, The bearing assembly includes a bearing assembly part, the inner wall of which is integrally connected to an outer ring frustum for contacting bearing rollers. The outer wall of the bearing assembly part is provided with an oil injection port, which extends through the bearing assembly part and the outer ring frustum to the inner wall of the outer ring frustum.

2. The injection-molded bearing housing according to claim 1, characterized in that, The inner wall of the outer ring truncated cone is recessed inward to form a guide groove, which is provided through one end face of the outer ring truncated cone.

3. The injection-molded bearing housing according to claim 2, characterized in that, The guide groove includes two groove walls that intersect with the outer truncated cone, and the groove walls are inclined from the bottom of the groove toward the inner wall of the outer truncated cone.

4. The injection-molded bearing housing according to claim 1, characterized in that, The inner wall of the outer ring frustum is a spherical structure, and the outer ring frustum and the rollers and cage connected thereto are adapted to it.

5. The injection-molded bearing housing according to claim 1, characterized in that, The outer wall of the bearing assembly part is also provided with at least two integrally formed fixing parts, and the fixing parts are provided with fixing holes.

6. The injection-molded bearing housing according to claim 3, characterized in that, The inclination angle of the groove wall ranges from 2° to 5°.

7. The injection-molded bearing housing according to claim 3, characterized in that, The bottom of the guide groove is projected into a trapezoidal shape along the radial direction of the outer frustum, and the side length located on the end face of the outer frustum is greater than the side not located on the end face of the outer frustum.

8. The injection-molded bearing housing according to claim 1, characterized in that, The inner wall of the outer truncated cone is smoothly formed, and its surface roughness ranges from Ra0.3 to Ra0.

8.

9. A molded bearing housing according to claim 1, characterized in that, The outer ring frustum is located in the middle of the bearing assembly part, and the bearing assembly part has sealing gaps on both sides of the outer ring frustum for assembling sealing gaskets.

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