Injection-molded metal polymer composite bearing

Abstract

The utility model discloses an injection-molded metal polymer composite bearing which comprises a metal piece and a first lubricating piece, the metal piece is provided with a first working face, and the first lubricating piece is wrapped on the first working face of the metal piece. A first fixing part and a second fixing part which are arranged at intervals in the length direction of a first working face are arranged on the first working face of the metal piece, the depth of the first fixing part is different from that of the second fixing part, the first lubricating piece comprises a first embedding part and a second embedding part, the first embedding part is embedded into the first fixing part, and the second embedding part is embedded into the second fixing part. And the second embedding part is embedded into the second fixing part. The problems that an existing metal polymer composite bearing needs to use a bonding layer, and procedures are complex are solved. And the two fixing parts with different depths not only can increase the contact area between the first lubricating piece and the metal piece, but also can reduce the influence on the strength of the metal piece as much as possible.

Description

Technical Field

[0001] The utility model relates to the field of composite bearings, in particular to an injection-molded metal-polymer composite bearing. Background Art

[0002] Metal polymer composite bearings are mainly composed of metal matrix and polymer materials. Polymer materials have the characteristics of low friction coefficient and high wear resistance, which can significantly reduce the wear of bearings during operation. Compared with traditional metal sliding bearings, they have lower friction coefficient and more application prospects. However, metal and polymer materials cannot be directly compounded due to physical properties. Generally, a bonding layer is set on the metal matrix for polymer composite. The bonding layer is generally sintered copper powder and copper mesh structure on the metal matrix for polymer composite, but this process is complicated and wastes resources. Utility Model Content

[0003] The utility model aims to provide an injection-molded metal-polymer composite bearing, which can effectively solve the problem that the existing metal-polymer composite bearing needs to use an adhesive layer and has complicated processes.

[0004] In order to solve the above technical problems, the utility model is achieved through the following technical solutions:

[0005] An injection-molded metal-polymer composite bearing comprises a metal part and a first lubricating part, wherein the metal part has a first working surface, the first lubricating part is coated on the first working surface of the metal part, the first working surface of the metal part is provided with a first fixing part and a second fixing part spaced apart along the length direction of the first working surface, the depth of the first fixing part and the depth of the second fixing part are different, the first lubricating part comprises a first embedded part and a second embedded part, the first embedded part is embedded in the first fixed part, and the second embedded part is embedded in the second fixed part.

[0006] In the above-mentioned injection-molded metal-polymer composite bearing, the ratio of the surface area of ​​the first fixing portion to the surface area of ​​the second fixing portion is 1:0.5-1:10.

[0007] In the above injection-molded metal-polymer composite bearing, the surface area of ​​the first fixing portion is greater than the surface area of ​​the second fixing portion.

[0008] In the above injection-molded metal-polymer composite bearing, the depth of the first fixing portion is greater than the depth of the second fixing portion.

[0009] In the above injection-molded metal-polymer composite bearing, the first fixing portion is a straight groove or a hole.

[0010] In the above injection-molded metal-polymer composite bearing, the second fixing portion is a straight groove.

[0011] In the above-mentioned injection-molded metal-polymer composite bearing, the length direction of the second fixing portion forms an acute angle with the length direction of the metal part; or, the second fixing portion is a plurality of straight grooves, all of which are arranged in parallel along a direction perpendicular to the length of the metal part.

[0012] In the above-mentioned injection-molded metal-polymer composite bearing, the metal part also has a second working surface, and the second working surface is arranged opposite to the first working surface. A second lubricating part is provided on the second working surface of the metal part, and the second lubricating part includes a third embedded part and a fourth embedded part. The first fixed part is a through hole or a through groove, and the third embedded part is embedded in the first fixed part. A third fixed part is provided on the second working surface of the metal part, and the fourth embedded part is embedded in the third fixed part.

[0013] In the above injection-molded metal-polymer composite bearing, the shape of the third fixing portion is consistent with the shape of the second fixing portion.

[0014] In the above injection-molded metal-polymer composite bearing, the thickness of the first lubricating component does not exceed 1 / 5 of the thickness of the metal component where the working surface is located.

[0015] Compared with the prior art, the advantages of the utility model are:

[0016] By setting a fixing part and an embedding part to cooperate, the problem that the current metal polymer composite bearing needs to use an adhesive layer and the process is complicated is solved. By setting two fixing parts of different depths on the first working surface of the metal part, and setting an embedding part that cooperates with the different fixing parts on the first lubricating part, the first lubricating part and the metal part are embedded together using an injection molding process, so that an adhesive layer is not used, and the two fixing parts of different depths can increase the contact area between the first lubricating part and the metal part, enhance the connection strength between the metal part and the lubricating part, and can also minimize the impact on the strength of the metal part.

[0017] Furthermore, the ratio of the surface area of ​​the first fixing part to the surface area of ​​the second fixing part is 1:0.5-1:10. The surface areas of the two fixing parts can be set according to the size of the composite bearing, but the surface area ratio should not be too small, otherwise the smaller fixing part may not be able to play an auxiliary role.

[0018] Furthermore, the surface area of ​​the first fixing part is greater than the surface area of ​​the second fixing part. The first fixing part with a deeper depth has a larger surface area and plays a major fixing role, while the second fixing part with a shallower depth has a relatively smaller surface area and plays an auxiliary fixing role.

[0019] Furthermore, the depth of the first fixing portion is greater than the depth of the second fixing portion. The first fixing portion with a larger surface area also has a deeper depth, which can better play the main fixing role.

[0020] Furthermore, the first fixing portion is a straight groove or a hole. The groove or the hole is relatively easy to be processed and formed, which can reduce the processing difficulty and improve the processing efficiency.

[0021] Furthermore, the second fixing portion is a straight groove. The second fixing portion is set as a straight groove to fully utilize the position between the two first fixing portions and expand the contact surface with the lubricating element.

[0022] Furthermore, the length direction of the second fixing portion forms an acute angle with the length direction of the metal piece; or, the second fixing portion is a plurality of straight grooves, all of which are arranged in parallel along a direction perpendicular to the length of the metal piece. The second fixing portions of two different structures can both produce a good fixing effect.

[0023] Furthermore, the metal part also has a second working surface, and the second working surface is arranged opposite to the first working surface. A second lubricating part is arranged on the second working surface of the metal part, and the second lubricating part includes a third embedded part and a fourth embedded part. The first fixed part is a through hole or a through groove, and the third embedded part is embedded in the first fixed part. A third fixed part is arranged on the second working surface of the metal part, and the fourth embedded part is embedded in the third fixed part. The second working surface is arranged on the metal part, and the lubricating parts on the two working surfaces can share a first fixed part, which not only makes the two lubricating parts connected as one, but also reduces the number of fixed parts on the metal part, thereby improving the strength of the metal part.

[0024] Furthermore, the shape of the third fixing portion is consistent with that of the second fixing portion. The third fixing portion maintains the same shape as the second fixing portion, which is more conducive to processing.

[0025] Furthermore, the thickness of the first lubricating component does not exceed 1 / 5 of the thickness of the metal component where the working surface is located. If the lubricating component is too thin, its life will be short, and if it is too thick, it will occupy the thickness of the metal component, resulting in a decrease in strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional diagram of the first embodiment of the utility model;

[0027] Figure 2 It is a front view of the first structure of the metal part in the first embodiment of the utility model;

[0028] Figure 3 It is a front view of the second structure of the metal part in the first embodiment of the utility model;

[0029] Figure 4It is a front view of the third structure of the metal part in the first embodiment of the utility model;

[0030] Figure 5 It is a cross-sectional view of the composite bearing in the first embodiment of the utility model;

[0031] Figure 6 It is a cross-sectional view of the composite bearing in the second embodiment of the present utility model.

[0032] The accompanying drawings are marked as follows:

[0033] Metal part 10, first working surface 11, first fixing portion 12, second fixing portion 13, second working surface 14, third fixing portion 15;

[0034] A first lubricating member 20, a first embedded portion 21, and a second embedded portion 22;

[0035] The second lubricating member 30 , the third embedding portion 31 , and the fourth embedding portion 32 . DETAILED DESCRIPTION

[0036] An injection-molded metal-polymer composite bearing comprises a metal part 10 and a first lubricating part 20. The metal part 10 has a first working surface 11. The first lubricating part 20 is coated on the first working surface 11 of the metal part 10. The first working surface 11 of the metal part 10 is provided with a first fixing portion 12 and a second fixing portion 13 spaced apart along the length direction of the first working surface 11. The depth of the first fixing portion 12 and the depth of the second fixing portion 13 are different. The first lubricating part 20 comprises a first embedded portion 21 and a second embedded portion 22. The first embedded portion 21 is embedded in the first fixed portion 12, and the second embedded portion 22 is embedded in the second fixed portion 13.

[0037] By arranging the fixing part and the embedding part to cooperate, the problem that the current metal polymer composite bearing needs to use an adhesive layer and the process is complicated is solved. By arranging two fixing parts of different depths on the first working surface 11 of the metal part 10, and arranging the embedding part that cooperates with the different fixing parts on the first lubricating part 20, the first lubricating part 20 and the metal part 10 are embedded together by injection molding process, so that the adhesive layer is not used, and the two fixing parts of different depths can increase the contact area between the first lubricating part 20 and the metal part 10, and can also minimize the impact on the strength of the metal part 10.

[0038] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0040] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0041] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] Embodiment 1:

[0043] See also Figures 1 to 5 This is an embodiment 1 of an injection-molded metal-polymer composite bearing of the utility model, an injection-molded metal-polymer composite bearing, comprising a metal part 10 and a first lubricating part 20, wherein the metal part 10 is in an elongated strip shape in the initial stage, and the first lubricating part 20 is injected onto the metal part 10 and then bent into a hollow circular ring to form a bearing.

[0044] The metal part 10 has a first working surface 11. In the present embodiment, the first working surface 11 is the outer circumferential surface of the bearing after bending. Of course, if the first working surface 11 is the inner circumferential surface or end surface of the bearing, the same structure is used to allow the first lubricating part 20 to be injection molded together with the metal part 10.

[0045] The first lubricating member 20 is coated on the first working surface 11 of the metal member 10. The first fixing portion 12 and the second fixing portion 13 are arranged at intervals along the length direction of the first working surface 11 on the first working surface 11 of the metal member 10. The first fixing portion 12 and the second fixing portion 13 have different depths. The first lubricating member 20 is provided with a first embedding portion 21 and a second embedding portion 22. The first embedding portion 21 is embedded in the first fixing portion 12 after injection molding, and the second embedding portion 22 is embedded in the second fixing portion 13 after injection molding. The fixing portions of different depths not only expand the contact surface between the first lubricating member 20 and the metal member 10, but also minimize the impact on the strength of the metal member 10.

[0046] Generally, the ratio of the surface area of ​​the first fixing part 12 to the surface area of ​​the second fixing part 13 is 1:0.5-1:10. If the ratio difference is too large, the fixing part with a relatively small area will not be able to play a connecting role. In this embodiment, the surface area of ​​the first fixing part 12> the surface area of ​​the second fixing part 13 forms a primary and secondary fixing part, and the depth of the first fixing part 12> the depth of the second fixing part 13, so that the depth of the first fixing part 12 with a large area will be greater than the depth of the second fixing part 13 with a small surface area, so as to better form a primary and secondary relationship, ensuring that the first fixing part 12 can play a major connecting and fixing role, while the second fixing part 13 plays an auxiliary connecting role. Preferably, the ratio of the surface area of ​​the first fixing part 12 to the surface area of ​​the second fixing part 13 is 1:1-1:3, so as to avoid a large difference in the surface area of ​​the first fixing part 12 and the second fixing part 13, so that the second fixing part 13 can also play an auxiliary connecting role.

[0047] like Figure 2 As shown, a structural form of the first fixing part 12 and the second fixing part 13, in which the first fixing part 12 is a straight groove, the second fixing part 13 is also a straight groove, the second fixing part 13 has three straight grooves, and the three straight grooves are arranged in parallel along the length direction of the metal part 10, dividing the second fixing part 13 into three small straight grooves, while increasing the contact surface between the first lubricating part 20 and the metal part 10, minimizing the damage to the strength of the metal part 10.

[0048] like Figure 3 As shown, the second structural form of the first fixing portion 12 and the second fixing portion 13, in this case, the first fixing portion 12 is a straight groove, the second fixing portion 13 is also a straight groove, and the length direction of the second fixing portion 13 forms an acute angle with the length direction of the metal part 10, that is, the second fixing portion 13 is an inclined straight groove, so that the second fixing portion 13 can better withstand the axial force.

[0049] like Figure 4 As shown, the third structural form of the first fixing part 12 and the second fixing part 13, in this case, the first fixing part 12 is a circular hole, and the second fixing part 13 is still a straight groove. The structure of the first fixing part 12 can better withstand the component forces in all directions within the working surface.

[0050] Based on the above embodiment, the thickness of the first lubricating component 20 does not exceed 1 / 5 of the thickness of the metal component 10 where the working surface is located, so as to avoid the first lubricating component 20 being too thick and causing the first lubricating component 20 to break when bent into a hollow ring shape after injection molding.

[0051] The manufacturing method of the metal polymer composite bearing of the above structure is as follows:

[0052] Step 1: Opening a first fixing portion 12 and a second fixing portion 13 on the first working surface 11 of the metal member 10, that is, opening corresponding straight grooves or holes according to the setting;

[0053] Step 2: Then mix the polymer materials evenly and put them into a twin-screw extruder to obtain plastic particles;

[0054] Step 3: Put the plastic particles in step 2 and the metal part 10 in step 1 into an injection molding machine, and perform injection molding to obtain a composite profile;

[0055] Step 4: Bend the composite profile to prepare a bearing.

[0056] The metal polymer composite bearing supported by the above structure uses two fixing parts with different depths to cooperate with the embedded part of the lubricating part, which improves the structure of the lubricating part and the metal part 10. When the bearing is running under more complex working conditions, it can better cope with axial and radial forces, which cannot be fully satisfied by a single structural fixing part, avoiding the risk of the lubricating part falling off. The combination of holes and grooves, on the one hand, increases the contact area between the metal part 10 and the lubricating part, improves the bonding strength, and on the other hand, is more conducive to the bearing to cope with radial and axial working conditions.

[0057] Embodiment 2

[0058] like Figure 6 As shown, based on the first embodiment, a second working surface 14 is provided in this embodiment, and the second working surface 14 is arranged opposite to the first working surface 11, that is, if the first working surface 11 is on the outer circumferential surface of the composite bearing, the second working surface 14 is on the inner circumferential surface of the composite bearing.

[0059] The structure of the metal part 10 is also changed accordingly. A second lubricating part 30 is provided on the second working surface 14 of the metal part 10. The second lubricating part 30 includes a third embedded part 31 and a fourth embedded part 32. The first fixed part 12 is a through hole or a through groove. The third embedded part 31 is embedded in the first fixed part 12. A third fixed part 15 is provided on the second working surface 14. The fourth embedded part 32 is embedded in the third fixed part 15. By setting the first fixed part 12 as a through hole or a through groove, the first embedded part 21 and the third embedded part 31 share the first fixed part 12, which not only reduces the number of holes or grooves on the metal part 10 and avoids the reduction of the strength of the metal part 10, but also allows the first lubricating part 20 and the second lubricating part 30 to be connected together, thereby improving the fixing strength of the lubricating part and the metal part 10.

[0060] Furthermore, in order to reduce the difficulty of processing, the shape of the third fixing portion 15 is consistent with the shape of the second fixing portion 13, so that the second lubricating component 30 has the same ability to resist forces in different directions as the first lubricating component 20, and due to the consistent shape, the processing difficulty can also be reduced during processing.

[0061] For other contents not described in this embodiment, please refer to Embodiment 1.

[0062] The above description is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any changes or modifications made by any technician in the field of the present invention are included in the patent scope of the present invention.

Claims

1. An injection molded metal-polymer composite bearing, comprising a metal part and a first lubricating part, wherein the metal part has a first working surface, and the first lubricating part is coated on the first working surface of the metal part, characterized in that: The first working surface of the metal part is provided with a first fixing part and a second fixing part spaced apart along the length direction of the first working surface, the first fixing part has a different depth from the second fixing part, and the first lubricating part includes a first embedding part and a second embedding part. The first embedded portion is embedded in the first fixed portion, and the second embedded portion is embedded in the second fixed portion.

2. The injection molded metal-polymer composite bearing according to claim 1, characterized in that: The ratio of the surface area of ​​the first fixing portion to the surface area of ​​the second fixing portion is 1:0.5-1:

10.

3. The injection molded metal-polymer composite bearing according to claim 2, characterized in that: The surface area of ​​the first fixing portion is greater than the surface area of ​​the second fixing portion.

4. The injection molded metal-polymer composite bearing according to claim 3, characterized in that: The depth of the first fixing portion is greater than the depth of the second fixing portion.

5. The injection molded metal-polymer composite bearing according to claim 1, characterized in that: The first fixing portion is a straight groove or a hole.

6. The injection molded metal-polymer composite bearing according to claim 1, characterized in that: The second fixing portion is a straight groove.

7. An injection molded metal-polymer composite bearing as claimed in claim 6, characterized in that: The length direction of the second fixing portion forms an acute angle with the length direction of the metal piece; or, the second fixing portion is a plurality of straight grooves, and all the straight grooves are arranged in parallel along a direction perpendicular to the length of the metal piece.

8. The injection molded metal-polymer composite bearing according to claim 1, characterized in that: The metal part also has a second working surface, and the second working surface is arranged opposite to the first working surface. A second lubricating part is provided on the second working surface of the metal part, the second lubricating part includes a third embedded part and a fourth embedded part, the first fixed part is a through hole or a through groove, the third embedded part is embedded in the first fixed part, a third fixed part is provided on the second working surface of the metal part, and the fourth embedded part is embedded in the third fixed part.

9. The injection molded metal-polymer composite bearing according to claim 8, characterized in that: The shape of the third fixing portion is consistent with the shape of the second fixing portion.

10. The injection molded metal-polymer composite bearing according to claim 1, characterized in that: The thickness of the first lubricating part does not exceed 1 / 5 of the thickness of the metal part where the working surface is located.

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