Rubber combined needle bearing for automobile steering system

Abstract

The utility model relates to the technical field of bearings, and provides a rubber combined needle roller bearing for an automobile steering system, which comprises a stamping outer ring, a needle roller body is arranged inside the stamping outer ring, a retainer is arranged outside the needle roller body, a bearing outer sleeve is arranged outside the stamping outer ring, and the bearing outer sleeve is sleeved outside the stamping outer ring. The stamping outer ring is fixedly connected with the bearing outer sleeve, an outer sleeve framework is annularly arranged at the corner of one side of the bearing outer sleeve in a sleeving mode, the bearing outer sleeve is attached to the outer portion of the stamping outer ring, and a connecting frame is fixedly connected to one side of the outer sleeve framework. Damping and noise reduction can be effectively achieved, corrosion resistance and abrasion resistance are improved through the arranged outer sleeve framework, the outer sleeve framework is tightly combined with the bearing outer sleeve, and a stable supporting structure is provided.

Description

Technical Field

[0001] This utility model relates to the field of bearing technology, specifically to a rubber-combined needle roller bearing for automotive steering systems. Background Technology

[0002] Needle bearings are roller bearings with cylindrical rollers that are both thin and long relative to their diameter. These rollers are called needles. Despite their small cross-section, the bearings still have a high load-bearing capacity. Needle bearings are equipped with thin and long rollers (roller diameter D≤5mm, L / D≥2.5, where L is the roller length), resulting in a compact radial structure. When the inner diameter and load capacity are the same as other types of bearings, the outer diameter is the smallest, making them particularly suitable for support structures where radial installation dimensions are limited. With the development of the automotive industry, the performance requirements for automotive parts are becoming increasingly stringent. As a key component in the automotive steering system, the performance of bearings directly affects the handling and safety of the vehicle. Traditional needle bearings are mostly made of metal, which, although possessing high load-bearing capacity and wear resistance, still falls short in certain applications, such as automotive steering gears, where bearings are required to simultaneously possess characteristics such as vibration damping, noise reduction, and long service life. Therefore, a new type of rubber needle bearing is needed to solve these problems.

[0003] It has certain limitations in applications requiring cushioning, shock absorption, and high sealing performance.

[0004] A search revealed an existing patent (CN203926395U) that discloses a rubber-combined needle roller bearing for automotive steering systems. The outer ring of the needle roller bearing has a concave inner wall forming an inwardly pressing elastic ring. When the spindle is pressed into the inner hole of the needle roller bearing, the elastic ring causes the needle rollers to adhere to the outer circumference of the spindle, achieving zero or small clearance between the needle roller bearing and the spindle. This reduces the possibility of steering wheel slippage, lowers vibration and noise, and improves the safety and comfort of the vehicle. The technical solution of this utility model is: a rubber composite needle roller bearing for automotive steering systems, an elastic stamped outer ring needle roller bearing for automotive steering systems, used for mounting on a spindle, comprising a stamped outer ring, needle rollers, and a cage. The cage is disposed inside the stamped outer ring and has several mounting holes. The needle rollers are installed in the space formed by the mounting holes and the stamped outer ring. The peripheral wall of the stamped outer ring is concave to form an inwardly pressing elastic ring. When the spindle is pressed into the inner hole of the needle roller bearing, the elastic ring causes the needle rollers to adhere to the outer circumference of the spindle to reduce the gap between the needle roller bearing and the spindle. Furthermore, the elastic ring is formed by an arc-shaped concave outer surface and an arc-shaped convex inner surface of the peripheral wall of the stamped outer ring. When the spindle is pressed into the inner hole of the needle roller bearing, the concave elastic ring is elastically deformed into a straight cylindrical shape under the pressure of the spindle, with both its inner and outer surfaces being horizontally columnar. The advantages of this utility model are: In this utility model, the outer ring of the stamped outer ring is concave to form an elastic ring that applies pressure inward. When the mandrel is pressed into the inner hole of the needle roller bearing, the elastic ring causes the needle rollers to adhere to the outer circumference of the mandrel, achieving the requirement of zero or small clearance between the needle roller bearing and the mandrel, thereby reducing the possibility of steering wheel slippage and reducing vibration and noise, and improving the safety and comfort of the car.

[0005] However, the overall installation structure of the above scheme is not convenient for cleaning its interior and has limited resistance to deformation.

[0006] In view of this, the present invention proposes a rubber-combined needle roller bearing for automotive steering systems. Utility Model Content

[0007] This utility model proposes a rubber composite needle roller bearing for automotive steering systems, which solves the problems of inconvenient internal cleaning and limited resistance to deformation in related technologies due to their overall installation structure.

[0008] The technical solution of this utility model is as follows: A rubber composite needle roller bearing for an automotive steering system includes a stamped outer ring; a needle roller body is disposed inside the stamped outer ring; a retainer is disposed outside the needle roller body; a bearing outer sleeve is disposed outside the stamped outer ring; a sleeve skeleton is annularly sleeved on one side corner of the bearing outer sleeve; the bearing outer sleeve fits against the outside of the stamped outer ring; a connecting bracket is fixedly connected to one side of the sleeve skeleton; an insertion hole is opened inside the bearing outer sleeve; a connecting bracket is inserted and connected inside the insertion hole; the bearing outer... The other side of the sleeve is provided with a ramp surface, and a T-shaped slot is opened inside the ramp surface. An oblique rod hole is opened inside the connecting frame. An oblique positioning hole is opened below the insertion hole. The T-shaped insertion rod is inserted into the T-shaped slot, the oblique rod hole and the oblique positioning hole in sequence. A protective cover is provided on the outside of the ramp surface. The protective cover is fixed to the outside of the bearing outer ring ramp surface. The stamped outer ring, the bearing outer ring and the outer ring skeleton cooperate with each other to increase the wear resistance, stability and load-bearing capacity of the bearing, thereby increasing the service life of the bearing.

[0009] Preferably, the protective cover has a threaded groove 1 inside, and the bearing sleeve has a threaded groove 2 corresponding to the threaded groove 1 on the side opposite to the protective cover.

[0010] Preferably, the threaded groove one has a threaded rod internally connected to it, and the other end of the threaded rod is threaded to the threaded groove two. The protective cover and the bearing outer sleeve are fixed by the threaded rod. The threaded groove one can fix the protective cover and the bearing outer sleeve, and at the same time fix the outer sleeve skeleton and the connecting frame to maintain the stability of the bearing.

[0011] Preferably, one side of the protective cover fits with the sloping surface of the bearing outer sleeve, and a limiting groove is provided on the sloping surface of the protective cover. The top of the T-shaped insert protrudes from the sloping surface, and the limiting groove is inserted laterally into the limiting groove by one side of the T-shaped insert. A slot is provided at one corner of the bearing outer sleeve to accommodate the outer sleeve skeleton. Recesses are provided on both sides of the needle roller body, and the contact surface between the retainer and the needle roller body is provided with protrusions extending into the recesses. The limiting groove can be used to position the rotation direction of the protective cover, preventing it from shaking and affecting the stability of the threaded rod fixation.

[0012] Preferably, there are multiple connecting frames, which are equidistantly distributed on one side of the outer shell frame. The number of insertion holes, T-shaped slots, oblique rod holes, oblique positioning holes, and T-shaped inserts is the same as the number of connecting frames.

[0013] Preferably, the bearing outer sleeve is made of nitrile rubber. The bearing outer sleeve can achieve excellent oil resistance, wear resistance and corrosion resistance, while also having good elasticity, which can effectively reduce vibration and noise.

[0014] Preferably, the outer shell skeleton is made of DC04 (St14) cold-rolled steel. The surface of the outer shell skeleton is treated with blackening of cold-rolled steel. The outer shell skeleton improves corrosion resistance and wear resistance. The outer shell skeleton is tightly integrated with the bearing outer shell, providing a stable support structure.

[0015] Preferably, the retainer is made of PA66-GF25 material, which is nylon material containing 25% glass fiber reinforcement. The retainer has good mechanical strength and wear resistance, and can effectively fix the needle roller body to prevent it from falling off or shifting.

[0016] Preferably, the needle roller body is made of GCr15 material, i.e., high carbon chromium bearing steel. The needle roller body has high hardness and high wear resistance, and can withstand large loads, ensuring the transmission efficiency and load-bearing capacity of the bearing.

[0017] Preferably, the stamped outer ring is also made of DC04 (St14) material, and the thickness of the diffusion layer on the surface of the stamped outer ring is 0.08-0.15mm. The stamped outer ring improves the wear resistance and corrosion resistance of the stamped outer ring.

[0018] The beneficial effects of this utility model are as follows:

[0019] The bearing outer sleeve in this invention achieves excellent oil resistance, wear resistance, and corrosion resistance, while also possessing good elasticity, effectively reducing vibration and noise. The outer sleeve skeleton enhances corrosion resistance and wear resistance, and the outer sleeve skeleton is tightly integrated with the bearing outer sleeve, providing a stable support structure. The cage has good mechanical strength and wear resistance, effectively fixing the needle roller body and preventing it from falling off or shifting. The needle roller body has high hardness and high wear resistance, enabling it to withstand large loads and ensuring the transmission efficiency and load-bearing capacity of the bearing. The stamped outer ring enhances the wear resistance and corrosion resistance of the stamped outer ring.

[0020] In this invention, the stamped outer ring, bearing outer sleeve, and outer sleeve skeleton work together to increase the wear resistance, stability, and load-bearing capacity of the bearing, thereby increasing the service life of the bearing.

[0021] In this invention, the threaded groove enables the fixing of the protective cover and the bearing outer sleeve, while also fixing the outer sleeve frame and connecting frame to maintain the stability of the bearing. The limiting groove enables the positioning of the rotation direction of the protective cover to prevent it from shaking and affecting the stability of the threaded rod fixing. Attached Figure Description

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0023] Figure 1 This is a frontal three-dimensional structural schematic diagram of the present invention;

[0024] Figure 2 This is a three-dimensional structural diagram of the rear view of this utility model;

[0025] Figure 3 This is a three-dimensional schematic diagram of the rear view of the present invention with the protective cover removed;

[0026] Figure 4 This is a front view structural diagram of the present invention;

[0027] Figure 5 This is a side view of the internal structure of this utility model;

[0028] Figure 6 This utility model Figure 5 A magnified structural diagram of point A in the middle.

[0029] In the diagram: 1. Stamped outer ring; 2. Needle roller body; 3. Cage; 4. Outer sleeve skeleton; 5. Bearing outer sleeve; 6. Insertion hole; 7. Connecting bracket; 8. T-slot; 9. Angled rod hole; 10. Angled positioning hole; 11. T-shaped insert; 12. Groove; 13. Protrusion; 14. Protective cover; 15. Threaded groove one; 16. Threaded rod; 17. Threaded groove two; 18. Limiting groove. Detailed Implementation

[0030] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model. Example

[0031] A preferred embodiment of the rubber composite needle roller bearing for automotive steering systems provided by this utility model is, for example... Figures 1 to 6As shown: A rubber composite needle roller bearing for an automotive steering system includes a stamped outer ring 1; a needle roller body 2 is disposed inside the stamped outer ring 1; a retainer 3 is disposed outside the needle roller body 2; a bearing outer sleeve 5 is disposed outside the stamped outer ring 1; a sleeve skeleton 4 is annularly fitted on one side corner of the bearing outer sleeve 5; the bearing outer sleeve 5 fits against the outside of the stamped outer ring 1; a connecting frame 7 is fixedly connected to one side of the sleeve skeleton 4; an insertion hole 6 is provided inside the bearing outer sleeve 5; the connecting frame 7 is inserted into the insertion hole 6; a ramp surface is provided on the other side of the bearing outer sleeve 5; a T-shaped slot 8 is provided inside the ramp surface; a diagonal rod hole 9 is provided inside the connecting frame 7; a diagonal positioning hole 10 is provided below the insertion hole 6; a T-shaped rod 11 is sequentially inserted into the T-shaped slot 8, the diagonal rod hole 9, and the diagonal positioning hole 10; a protective cover 14 is sleeved on the outside of the ramp surface; the protective cover 14 is fixed to the outside of the ramp surface of the bearing outer sleeve 5.

[0032] It should be noted that existing needle roller bearings still have certain shortcomings. Their overall installation structure makes it inconvenient to clean their interior, and their resistance to deformation is limited.

[0033] In this embodiment, the combination of the stamped outer ring 1, the bearing outer sleeve 5, and the outer sleeve skeleton 4 can increase the wear resistance, stability, and load-bearing capacity of the bearing, thereby increasing the service life of the bearing.

[0034] In a further preferred embodiment of the present invention, the protective cover 14 has a threaded groove 15 inside, and the bearing sleeve 5 has a threaded groove 17 corresponding to the threaded groove 15 on the side opposite to the protective cover 14.

[0035] In a further preferred embodiment of the present invention, a threaded rod 16 is threadedly connected to the inside of the threaded groove 15, and the other end of the threaded rod 16 is threadedly connected to the threaded groove 17. The protective cover 14 and the bearing sleeve 5 are fixed by the threaded rod 16.

[0036] In this embodiment, the threaded groove 15 can be used to fix the protective cover 14 and the bearing outer sleeve 5, and at the same time fix the outer sleeve skeleton 4 and the connecting frame 7 to maintain the stability of the bearing.

[0037] In a further preferred embodiment of this utility model, one side of the protective cover 14 fits with the slope surface of the bearing outer sleeve 5, the slope surface of the protective cover 14 is provided with a limiting groove 18, the top of the T-shaped insert 11 protrudes from the slope surface, the limiting groove 18 is inserted laterally by one side of the T-shaped insert 11 into the limiting groove 18, one corner of the bearing outer sleeve 5 is provided with a groove 12 adapted to fit the outer sleeve skeleton 4, the two sides of the needle roller body 2 are provided with recesses, and the contact surface of the retainer 3 and the needle roller body 2 is provided with a protrusion 13 extending into the recess.

[0038] In this embodiment, the limiting groove 18 can be used to position the rotation direction of the protective cover 14, preventing it from shaking and affecting the stability of the threaded rod 16. Example

[0039] Based on Embodiment 1, a preferred embodiment of the rubber composite needle roller bearing for automotive steering systems provided by this utility model is, for example... Figures 1 to 6 As shown: There are multiple connecting frames 7, which are equidistantly distributed on one side of the outer frame 4. The number of insertion holes 6, T-shaped slots 8, oblique rod holes 9, oblique positioning holes 10 and T-shaped insertion rods 11 is the same as the number of connecting frames 7.

[0040] In a further preferred embodiment of this utility model, the bearing outer sleeve 5 is made of nitrile rubber.

[0041] In this embodiment, the bearing outer sleeve 5 provides excellent oil resistance, wear resistance, and corrosion resistance, while also exhibiting good elasticity, effectively reducing vibration and noise.

[0042] In a further preferred embodiment of the present invention, the outer frame 4 is made of DC04 (St14) cold-rolled steel, and the surface of the outer frame 4 is treated with blackening of cold-rolled steel.

[0043] In this embodiment, the outer shell skeleton 4 improves corrosion resistance and wear resistance. The outer shell skeleton 4 is tightly integrated with the bearing outer shell 5, providing a stable support structure.

[0044] In a further preferred embodiment of this utility model, the retainer 3 is made of PA66-GF25 material, that is, nylon 66 material containing 25% glass fiber reinforcement.

[0045] In this embodiment, the retainer 3 has good mechanical strength and wear resistance, and can effectively fix the needle roller body 2 to prevent it from falling off or shifting.

[0046] In a further preferred embodiment of this utility model, the needle roller body 2 is made of GCr15 material, i.e., high carbon chromium bearing steel.

[0047] In this embodiment, the needle roller body 2 is designed to have high hardness and high wear resistance, enabling it to withstand large loads and ensuring the transmission efficiency and load-bearing capacity of the bearing.

[0048] In a further preferred embodiment of the present invention, the stamped outer ring 1 is also made of DC04 (St14) material, and the thickness of the diffusion layer on the surface of the stamped outer ring 1 is 0.08-0.15mm.

[0049] In this embodiment, the wear resistance and corrosion resistance of the stamped outer ring 1 are improved by the addition of a stamped outer ring 1.

[0050] The working principle of this utility model is as follows: The bearing outer sleeve 5 is installed on the outside of the cage 3 and the stamped outer ring 1. After the insert rod 7 is inserted into the insert hole 6, the outer sleeve skeleton 4 is engaged with the outside of the slot 12. Then, it is inserted into the T-shaped slot 8, the oblique rod hole 9 and the oblique positioning hole 10 through the oblique positioning hole 10 for limiting. The protruding part is inserted into the limiting groove 18 inside the oblique surface of the protective cover 14 for limiting. The protective cover 14 and the bearing outer sleeve 5 are fixed by the threaded rod 16. The T-shaped insert rod 11 can be pulled out by removing the threaded rod 16 to disassemble the bearing for easy cleaning. The outer sleeve skeleton 4 is tightly connected with the bearing outer sleeve 5 to provide a stable support structure.

[0051] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A rubber-combined needle roller bearing for an automotive steering system, characterized in that, The system includes a stamped outer ring (1): a needle roller body (2) is provided inside the stamped outer ring (1), a retainer (3) is provided outside the needle roller body (2), a bearing outer sleeve (5) is provided outside the stamped outer ring (1), a sleeve skeleton (4) is provided on one side corner of the bearing outer sleeve (5) in an annular shape, the bearing outer sleeve (5) fits against the outside of the stamped outer ring (1), a connecting frame (7) is fixedly connected to one side of the sleeve skeleton (4), and an insertion hole (6) is provided inside the bearing outer sleeve (5). The bearing outer sleeve (5) is connected to a connecting frame (7). A ramp surface is provided on the other side of the bearing outer sleeve (5). A T-shaped slot (8) is provided inside the ramp surface. An oblique rod hole (9) is provided inside the connecting frame (7). An oblique positioning hole (10) is provided below the insertion hole (6). A T-shaped insert rod (11) is inserted inside the T-shaped slot (8), the oblique rod hole (9) and the oblique positioning hole (10). A protective cover (14) is provided on the outside of the ramp surface. The protective cover (14) is fixed to the outside of the ramp surface of the bearing outer sleeve (5).

2. The rubber composite needle roller bearing for an automotive steering system according to claim 1, characterized in that, The protective cover (14) has a threaded groove 1 (15) inside, and the bearing sleeve (5) has a threaded groove 2 (17) corresponding to the threaded groove 1 (15) on the side opposite to the protective cover (14).

3. The rubber composite needle roller bearing for an automotive steering system according to claim 2, characterized in that, The threaded groove one (15) is internally threaded with a threaded rod (16), and the other end of the threaded rod (16) is threadedly connected to the threaded groove two (17). The protective cover (14) and the bearing sleeve (5) are fixed by the threaded rod (16).

4. A rubber-combined needle roller bearing for an automotive steering system according to claim 3, characterized in that, One side of the protective cover (14) fits with the slope of the bearing outer sleeve (5). The slope of the protective cover (14) is provided with a limiting groove (18). The top of the T-shaped insert (11) protrudes from the slope. The limiting groove (18) is inserted laterally into the inside of the limiting groove (18) by one side of the T-shaped insert (11). One corner of the bearing outer sleeve (5) is provided with a slot (12) adapted to fit the outer sleeve skeleton (4). The two sides of the needle roller body (2) are provided with recesses. The contact surface between the retainer (3) and the needle roller body (2) is provided with a protrusion (13) extending into the recess.

5. A rubber-combined needle roller bearing for an automotive steering system according to claim 4, characterized in that, The number of connecting brackets (7) is set to multiple, and the multiple connecting brackets (7) are equidistantly distributed on one side of the outer shell frame (4). The number of the insertion holes (6), T-shaped slots (8), oblique rod holes (9), oblique positioning holes (10) and T-shaped inserts (11) is the same as the number of connecting brackets (7).

6. A rubber-combined needle roller bearing for an automotive steering system according to claim 1, characterized in that, The bearing outer sleeve (5) is made of nitrile rubber.

7. A rubber-combined needle roller bearing for an automotive steering system according to claim 1, characterized in that, The outer frame (4) is made of DC04 (St14) cold-rolled steel, and the surface of the outer frame (4) is treated with blackening of cold-rolled steel.

8. A rubber-combined needle roller bearing for an automotive steering system according to claim 1, characterized in that, The retainer (3) is made of PA66-GF25 material, which is nylon 66 material containing 25% glass fiber reinforcement.

9. A rubber-combined needle roller bearing for an automotive steering system according to claim 1, characterized in that, The needle roller body (2) is made of GCr15 material, i.e., high carbon chromium bearing steel.

10. A rubber-combined needle roller bearing for an automotive steering system according to claim 1, characterized in that, The stamped outer ring (1) is also made of DC04 (St14) material, and the thickness of the diffusion layer on the surface of the stamped outer ring (1) is 0.08-0.15mm.

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