Transmission shaft hanging bracket rolling and sliding bearing assembly

Abstract

The invention discloses a rolling and sliding bearing assembly of a transmission shaft hanging bracket, which belongs to the technical field of bearings and comprises a rolling bearing, a sealing seat, a joint bearing assembly and a bearing seat, the joint bearing assembly comprises a joint inner ring and a joint outer ring, the joint outer ring is fixedly mounted on the inner circumferential surface of the bearing seat, and the joint inner ring is assembled on the outer ring of the rolling bearing; the rolling bearing outer ring and the joint inner ring can slide relatively, the outer sides of the two end faces of the rolling bearing are each provided with a sealing seat at an interval, and the outer circumferential faces of the two sealing seats are correspondingly fixed to the inner circumferential face of the joint inner ring. According to the invention, the requirements of axial movement and deflection angle in any axial direction of the transmission shaft in use can be met, and the deflection angle of the bearing becomes easy due to the existence of the knuckle bearing assembly; and the effective combination of the joint and the ball bearing ensures that the sealing element is not easy to eccentrically wear during deflection, and the service life is long.

Description

Technical Field

[0001] This invention relates to the field of bearing technology, and more specifically to a transmission shaft hanger roller bearing assembly. Background Technology

[0002] Driveshaft hangers are key components of the transmission systems of automobiles, construction machinery, or special vehicles. They are primarily used to support the driveshaft and maintain its stability, reducing vibration and wear. Currently, driveshaft hangers mainly use double-row spherical roller bearings (or deep groove ball bearings) and bearing housings to fix the driveshaft, ensuring its balance during high-speed rotation and preventing displacement caused by vibration or impact.

[0003] However, traditional automotive driveshafts operate under high-speed rotation and heavy loads for extended periods. Although double-row spherical roller bearings and deep groove ball bearings have a certain internal clearance and allow for slight axial runout, they are prone to damage due to overload when subjected to heavy loads, significant vibration and impact, or insufficient support rigidity and positional deviations caused by manufacturing errors. This leads to large radial deformation and axial displacement and runout, resulting in short service life. Furthermore, in harsh environments, bearings can experience wear and seizing due to seal failure and foreign object intrusion. Therefore, we provide a driveshaft hanger roller bearing assembly. Summary of the Invention

[0004] This invention provides a transmission shaft hanger roller bearing assembly, the main purpose of which is to overcome the shortcomings of existing transmission shaft hangers, such as insufficient bearing flexibility and short service life.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A drive shaft hanger roller bearing assembly includes a rolling bearing, a sealing seat, a spherical bearing assembly, and a bearing housing. The spherical bearing assembly includes an inner spherical ring and an outer spherical ring. The outer spherical ring is fixedly mounted on the inner circumferential surface of the bearing housing. The inner spherical ring is assembled on the outer ring of the rolling bearing. The outer ring of the rolling bearing and the inner spherical ring are slidable relative to each other. A sealing seat is provided at intervals on the outer sides of the two end faces of the rolling bearing. The outer circumferential surfaces of the two sealing seats are respectively fixed to the inner circumferential surface of the inner spherical ring.

[0006] In a preferred embodiment, a convex ring is formed at the middle of the outer end face of each of the above-mentioned sealing seats, and a mudguard ring is also provided between each convex ring and the outer peripheral surface of the bushing, and each mudguard ring has an movable gap between its corresponding outer end face of the sealing seat.

[0007] In a preferred embodiment, a sheath-type sealing rubber is further provided between the outer ring of the aforementioned convex ring and the inner circumferential surface of the outer ring of the joint.

[0008] In a preferred embodiment, the mudguard ring has a U-shaped cross-section, the inner ring of the mudguard ring is interference-fitted onto the bushing, and the outer ring of the mudguard ring is clearance-fitted with the inner circumferential surface of the convex ring.

[0009] The transmission shaft hanger rolling bearing assembly of the present invention further includes a bushing, the inner ring of the rolling bearing is fixedly mounted on the outer circumferential surface of the bushing, and the inner circumferential surface of each sealing seat cooperates with the outer circumferential surface of the bushing through a sealing element.

[0010] In a preferred embodiment, an annular groove is formed on the inner circumferential surface of the bushing, and an elastic retaining ring is installed in the annular groove.

[0011] In a preferred embodiment, the bushing is provided with a threaded hole communicating with the annular groove, and a set screw is installed in the threaded hole.

[0012] In a preferred embodiment, the sealing element is a single seal or a combination of multiple seals, and a sealing groove is provided on the inner circumferential surface of the sealing seat, with the single seal or the combination of multiple seals correspondingly disposed in the sealing groove.

[0013] In a preferred embodiment, the single seal can be an O-ring, and the multiple seal combination can be a combination of an O-ring and a felt seal.

[0014] In a preferred embodiment, the highest point of the spherical surface of the inner ring of the joint is provided with an annular groove, the outer surface of the bearing seat is provided with an oil injection hole communicating with the annular groove, the inner surface of the inner ring of the joint and the rolling bearing with clearance fit is provided with a spiral oil groove, the inner ring of the joint is also provided with a plurality of oil inlet holes that communicate with the annular groove and the spiral oil groove, and each of the sealing seats and the inner sidewalls of the rolling bearings are provided with an oil storage groove.

[0015] In a preferred embodiment, the bottom two sides of the bearing housing extend outward to form a mounting seat, and each mounting seat has a mounting hole.

[0016] In a preferred embodiment, the rolling bearing is preferably any one of a deep groove ball bearing, a paired angular contact bearing, a four-point contact ball bearing, or a double-row tapered roller bearing.

[0017] As can be seen from the above description of the structure of the present invention, compared with the prior art, the beneficial effects of the present invention are as follows: 1. The driveshaft hanger roller bearing assembly of the present invention comprises a rolling bearing, a spherical plain bearing assembly, a sealing seat, and a bearing housing. A sealing seat is provided at intervals on both end faces of the rolling bearing. When the driveshaft moves axially, the rolling bearing remains relatively stationary. Since the inner ring of the spherical plain bearing is slidably mounted on the outer ring of the rolling bearing, and the outer circumferential surface of the sealing seat is fixedly mounted on the inner circumferential surface of the inner ring, and the outer ring is fixed on the inner circumferential surface of the bearing housing, relative sliding occurs between the bearing housing, the spherical plain bearing assembly, the sealing seat, and the rolling bearing to accommodate the axial movement of the driveshaft. When the driveshaft oscillates radially around its axial cone angle, relative oscillation occurs between the spherical surface of the inner ring of the spherical plain bearing assembly and the outer ring, accommodating the radial oscillation requirements of the driveshaft. Furthermore, the presence of the spherical plain bearing facilitates bearing deflection. The effective combination of the spherical plain bearing assembly and the ball bearing ensures that the seal is not prone to wear during oscillation, exhibits good impact resistance, is not easily damaged, and has a long service life. The driveshaft hanger roller bearing assembly of the present invention is suitable for driveshaft systems in automobiles, construction machinery, and special vehicles.

[0018] 2. The drive shaft hanger roller bearing assembly of the present invention adopts a multi-seal structure consisting of seals, mudguards, and sheath-type sealing rubber, which improves sealing reliability and has a drainage function, preventing dust, sludge, etc. from entering the bearing interior and ensuring the reliability of the intermediate bearing under harsh working conditions. Under normal use, it can meet the working time requirement of more than 20,000 hours, achieving long maintenance or even maintenance-free operation in terms of total product lifespan. Attached Figure Description

[0019] Figure 1 This is the front view of the present invention.

[0020] Figure 2 This is a top view of the present invention.

[0021] Figure 3 for Figure 1 A cross-sectional view along the AA direction.

[0022] Figure 4 This is a schematic diagram of the invention mounted on a drive shaft. Detailed Implementation

[0023] Specific embodiments of the present invention will now be described with reference to the accompanying drawings. Many details are described below to provide a comprehensive understanding of the invention; however, those skilled in the art will be able to implement the invention without these details.

[0024] A drive shaft hanger roller bearing assembly, as shown in the reference. Figures 1 to 3It includes a rolling bearing 20, a sealing seat 30, a spherical bearing assembly, and a bearing housing 60. The spherical bearing assembly consists of an inner spherical ring 40 and an outer spherical ring 50. In this embodiment, two outer spherical rings 50 are shown, located on opposite sides of the outer spherical surface of the inner spherical ring 40.

[0025] Reference Figure 3 and Figure 4 To facilitate rapid installation and improve sealing performance, the drive shaft hanger roller bearing assembly of this invention further includes a bushing 10. An annular groove 100 is formed on the inner circumferential surface of the bushing 10, and an elastic retaining ring 11 is installed within the annular groove 100. A threaded hole 101 communicating with the annular groove 100 is formed on the bushing 10, and a set screw 12 is installed within the threaded hole 101. One end of the bushing 10 forms a tapered guide angle to guide the installation of the bushing. The bushing 10 is secured to the drive shaft 1 by the elastic retaining ring 11 and then fixed by the set screw 12.

[0026] Reference Figure 3 The aforementioned rolling bearing 20 can be any of the following rolling bearings that meet the operating conditions: long-life deep groove ball bearings, paired angular contact bearings, four-point contact ball bearings, double-row tapered roller bearings, etc.

[0027] The inner ring of the aforementioned rolling bearing 20 is fixedly mounted on the outer circumferential surface of the bushing 10, while the joint inner ring 40 is mounted on the outer ring of the rolling bearing 20. The outer ring of the rolling bearing and the joint inner ring can slide relative to each other. Preferably, in this embodiment, the inner ring of the rolling bearing 20 is mounted on the outer circumferential surface of the bushing 10 with an interference fit, and the joint inner ring 40 is mounted on the outer ring of the rolling bearing 20 with a clearance fit.

[0028] Reference Figure 3 Each of the two end faces of the rolling bearing 20 is provided with a sealing seat 30 spaced apart, with a distance of more than 2 mm between each sealing seat 30 and the rolling bearing 20. The outer peripheral surfaces of the two sealing seats 30 are respectively fixed to the inner peripheral surfaces of the inner ring of the joint. In this embodiment, the outer peripheral surfaces of the two sealing seats 30 are respectively threadedly connected to the inner peripheral surfaces on both sides of the ball joint 40, and the inner peripheral surface of each sealing seat 30 is engaged with the outer peripheral surface of the bushing 10 through a sealing element.

[0029] Preferably, the sealing element in this embodiment adopts multiple seals, including an inner sealing O-ring 71 and an outer sealing felt 72. Each sealing seat 30 has an inner sealing groove 31 and an outer sealing groove 32 on its inner circumferential surface. The inner sealing O-ring 71 and the outer sealing felt 72 are respectively located in the inner sealing groove 31 and the outer sealing groove 32.

[0030] Reference Figure 3Each of the two spherical sides of the inner joint ring 40 is respectively equipped with an outer joint ring 50, and each outer joint ring 50 is fixed to the inner circumferential surface of both sides of the bearing seat 60. Preferably, each outer joint ring 50 is fixed to the inner circumferential surface of both sides of the bearing seat 60 by means of a threaded connection. The spherical surfaces on both sides of the inner joint ring 40 are in contact with their corresponding outer joint rings 50, and the inner joint ring 40 can rotate around the two outer joint rings 50.

[0031] Reference Figure 3 Each of the above-mentioned sealing seats 30 has a convex ring 33 formed in the middle of the outer end face. A protective sealing rubber 34 is also provided between the outer ring of the convex ring 33 and the outer ring 50 of the joint, which can prevent dust and sludge from entering between the outer ring 50 and the inner ring 40 of the joint.

[0032] Reference Figure 3 Each convex ring 33 is further provided with a mudguard ring 35 between its outer circumferential surface and the bushing 10, and each mudguard ring 35 has a movable gap between its outer end face and the corresponding sealing seat 30. The cross-section of the mudguard ring 35 is preferably U-shaped, the inner ring of the mudguard ring 35 is interference-fitted onto the bushing 10, and the outer ring of the mudguard ring 35 is clearance-fitted with the inner ring of the convex ring 33.

[0033] The mud ring 35 can guide water flow, and because the mud ring 35 is interference-fitted on the bushing 10, it can rotate at high speed with the drive shaft 1. The centrifugal force generated by it can throw water out and prevent water from entering the sealing seat 30.

[0034] Reference Figure 3 The spherical surface of the inner ring 40 of the joint has an annular groove 41 at its highest point, and the outer surface of the bearing seat 60 has an oil injection hole 61 communicating with the annular groove 41. The inner surface of the inner ring 40, which is in clearance fit with the rolling bearing 20, has a spiral oil groove (not shown in the figure). The inner ring 40 also has several oil inlet holes 42 that connect the annular groove 41 with the spiral oil groove. Each sealing seat 30 has a grease reservoir 36 on its inner sidewall that is spaced apart from the rolling bearing 20. The grease of the present invention is preferably a long-life, wear-resistant graphene grease or other long-life grease. The grease is injected into the annular groove 41 through the oil injection hole 61, and then enters the spiral oil groove through the oil inlet hole 42, traversing the entire sliding distance, so as to realize that the grease is traversed from the oil filling hole to both ends of the rolling bearing. Excess grease is stored in the grease reservoir 36.

[0035] Reference Figure 1 and Figure 2 The bearing housing 60 has two sides extending outward to form a mounting seat 62. Each mounting seat 62 has a mounting hole 63 to facilitate the fixing of the drive shaft hanger roller bearing assembly to the frame.

[0036] The above embodiments show two joint outer rings, but the number of joint outer rings in this invention is not limited to two; it can also be one, that is, the two joint outer rings can be made into an integral structure.

[0037] The sealing element shown in the above embodiments includes an inner O-ring and an outer felt, but the sealing element of the present invention is not limited to this and can also be a single seal or other multiple seal combinations. When a single seal is used, it can be an O-ring; other multiple seal combinations can also be a combination of an O-ring and a felt seal.

[0038] The inner ring of the rolling bearing 20 is not limited to being assembled on the outer circumferential surface of the bushing 10 by an interference fit in the above embodiments. It can also be fixed to the bushing by means of elastic retaining rings, screws, or threaded connections.

[0039] Similarly, the outer circumferential surfaces of the two sealing seats 30 are respectively threaded onto the inner circumferential surfaces of the ball joint 40 on both sides. They can also be fixed to the sides of the ball joint by means of interference fit, elastic retaining rings, and screws. The two outer rings 50 of the joint are not limited to being fixed to the inner circumferential surface of the bearing housing 60 by means of threaded connection. They can also be fixed to the bearing housing 60 by means of interference fit, elastic retaining rings, and screws.

[0040] The above are merely specific embodiments of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial modifications made to the present invention using this concept shall be considered as infringing upon the protection scope of the present invention.

Claims

1. A drive shaft hanger roller bearing assembly, characterized in that: The system includes a rolling bearing, a sealing seat, a spherical bearing assembly, and a bearing housing. The spherical bearing assembly includes an inner spherical ring and an outer spherical ring. The outer spherical ring is fixedly mounted on the inner circumferential surface of the bearing housing. The inner spherical ring is assembled on the outer ring of the rolling bearing. The outer ring of the rolling bearing and the inner spherical ring can slide relative to each other. A sealing seat is provided at intervals on the outer sides of the two end faces of the rolling bearing. The outer circumferential surfaces of the two sealing seats are respectively fixed to the inner circumferential surface of the inner spherical ring.

2. The drive shaft hanger roller bearing assembly as described in claim 1, characterized in that: A convex ring is formed in the middle of the outer end face of each of the sealing seats, and a mudguard ring is also provided between each convex ring and the outer peripheral surface of the bushing. Each mudguard ring has an movable gap between its corresponding outer end face of the sealing seat.

3. The drive shaft hanger roller bearing assembly as described in claim 2, characterized in that: A sheath-type sealing rubber is also provided between the outer ring of the convex ring and the inner circumferential surface of the outer ring of the joint.

4. A transmission shaft hanger roller bearing assembly as described in claim 2 or 3, characterized in that: The mudguard ring has a U-shaped cross-section. The inner ring of the mudguard ring is interference-fitted onto the bushing, and the outer ring of the mudguard ring is clearance-fitted with the inner circumferential surface of the convex ring.

5. A transmission shaft hanger roller bearing assembly as described in claim 1, characterized in that: It also includes a bushing, the inner ring of the rolling bearing is fixedly mounted on the outer circumferential surface of the bushing, and the inner circumferential surface of each sealing seat is engaged with the outer circumferential surface of the bushing through a sealing element.

6. The drive shaft hanger roller bearing assembly as described in claim 5, characterized in that: An annular groove is formed on the inner circumferential surface of the bushing, and an elastic retaining ring is installed in the annular groove.

7. A drive shaft hanger roller bearing assembly as described in claim 6, characterized in that: The bushing has a threaded hole that communicates with the annular groove, and a set screw is installed in the threaded hole.

8. A drive shaft hanger roller bearing assembly as described in claim 5, characterized in that: The sealing element is a single seal or a combination of multiple seals, and the inner circumferential surface of the sealing seat is provided with a sealing groove, and the single seal or the combination of multiple seals is correspondingly disposed in the sealing groove.

9. A transmission shaft hanger roller bearing assembly as described in claim 6, characterized in that: The single seal uses an O-ring, and the multiple seal combination uses an O-ring and a felt seal.

10. A transmission shaft hanger roller bearing assembly as described in claim 1, characterized in that: The spherical surface of the inner ring of the joint has an annular groove at its highest point. The outer surface of the bearing seat has an oil injection hole that communicates with the annular groove. The inner surface of the inner ring of the joint and the rolling bearing has a spiral oil groove. The inner ring of the joint also has several oil inlet holes that communicate with the annular groove and the spiral oil groove. Each sealing seat has an oil storage groove on its inner sidewall that is spaced apart from the rolling bearing.

11. A drive shaft hanger roller bearing assembly as described in claim 1, characterized in that: The bearing housing extends outward from both sides of its bottom to form a mounting base, and each mounting base has a mounting hole.

12. The drive shaft hanger roller bearing assembly as described in claim 1, characterized in that: The rolling bearing is any one of the following: deep groove ball bearing, paired angular contact bearing, four-point contact ball bearing, or double-row tapered roller bearing.

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