Driving shaft assembly, transmission system and vehicle
By setting seals and retaining rings on both sides of the bearings of the drive shaft, the problem of bearings preventing foreign objects from entering is solved, the protection capability and stability of the bearings are improved, and the normal use of the vehicle is ensured.
Patent Information
- Application Number
- CN202422647534.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2025-08-08
- Estimated Expiration
- 2034-10-30
AI Technical Summary
In the prior art, the driving shaft's bearings have poor performance in preventing foreign objects from entering, and they are prone to enter foreign objects such as dust, water, sand and gravel after long-term use, resulting in bearing failure and affecting the normal use of the vehicle.
A first seal and a second seal are provided on both sides of the bearing, and in an axial plane perpendicular to the drive shaft, at least part of the projection of the bearing is within the projection range of the seal, and a fixed connection is made to the drive shaft through the seal to prevent foreign matter from entering. At the same time, a retaining ring is provided on both sides of the bearing to limit its position to prevent axial displacement.
It effectively reduces the chance of external foreign objects entering the bearing, improves the protection ability of the bearing, reduces the failure rate, and ensures the stability and normal use of the vehicle.
Smart Images
Figure CN223203625U_ABST
Abstract
Description
Technical Field
[0001] The embodiments of the present application relate to the technical field of vehicle parts manufacturing, and in particular to a drive shaft assembly, a transmission system, and a vehicle. Background Art
[0002] The drivetrain is a crucial component of a vehicle, transmitting power to the wheels, thereby propelling the vehicle forward. In new energy vehicles, the drivetrain includes components such as the electric drive, driveshaft, and wheels. The driveshaft connects the electric drive and wheels, transmitting the power generated by the electric drive to the wheels.
[0003] In related art solutions, the drive shaft typically uses a spline structure to mate with the spline structure within the electric drive to achieve power transmission. When the distance between the wheel and the electric drive is long, the drive shaft needs to be connected to the electric drive via a drive shaft bracket to address potential NVH issues. Specifically, the drive shaft bracket is mounted on the drive shaft via a bearing sleeve, and then fasteners are used to connect the drive shaft bracket to the electric drive.
[0004] However, with the above solution, the bearing has poor foreign matter-proof performance. After long-term use, dust, water, sand, gravel and other foreign matter may enter the bearing, causing bearing failure and affecting the normal use of the vehicle. Utility Model Content
[0005] In view of this, embodiments of the present application provide a drive shaft assembly, a transmission system, and a vehicle to improve the sealing of the bearing, reduce the risk of foreign matter entering, and ensure the normal use of the vehicle.
[0006] In order to achieve the above-mentioned purpose, the technical solution of the embodiment of the present application is implemented as follows:
[0007] An embodiment of the present application provides a drive shaft assembly, comprising:
[0008] A drive shaft, used to connect the electric drive and the wheels;
[0009] A bearing, comprising an inner ring, an outer ring, and a plurality of rolling elements, wherein the inner ring and the outer ring are rotatably connected via the plurality of rolling elements, and the inner ring is sleeved on the drive shaft;
[0010] A drive shaft bracket, the drive shaft bracket is used to connect the electric drive, the drive shaft bracket is further provided with a bearing mounting hole, and the outer ring is arranged in the bearing mounting hole;
[0011] A first seal and a second seal are also provided in the bearing mounting hole. The first seal and the second seal are both fixedly connected to the drive shaft. Along the axial direction of the drive shaft, the first seal and the second seal are respectively located on both sides of the bearing; in a plane perpendicular to the axial direction of the drive shaft, at least part of the projection of the bearing is located within the projection range of the first seal and the projection range of the second seal.
[0012] The embodiment of the present application arranges a first seal and a second seal on both sides of the bearing, and in a plane perpendicular to the axial direction of the drive shaft, the projection of at least part of the bearing is located within the projection range of the first seal and the second seal, so that the first seal and the second seal can be used to protect the bearing, reduce the probability of foreign matter entering the bearing during use, and ensure the normal use of the vehicle.
[0013] In one possible implementation of the present application, the first sealing member includes a first connecting portion and a first flange. The first connecting portion is provided with a first connecting hole. The first sealing member is sleeved on the drive shaft through the first connecting hole. The first flange is provided at an end of the first connecting portion close to the bearing. In a plane perpendicular to the axial direction of the drive shaft, at least a portion of the projection of the bearing is located within the projection range of the first flange.
[0014] The second seal includes a second connecting portion and a second flange, a second connecting hole is provided in the second connecting portion, and the second seal is sleeved on the drive shaft through the second connecting hole. The second flange is provided at one end of the second connecting portion close to the bearing. In a plane perpendicular to the axial direction of the drive shaft, at least part of the projection of the bearing is located within the projection range of the second flange.
[0015] In the embodiment of the present application, the first seal is fixedly connected to the drive shaft via the first connection portion, and the first flange prevents foreign matter from entering the bearing from one side, thereby protecting the bearing and improving the bearing's ability to prevent foreign matter from entering. The second seal is fixedly connected to the drive shaft via the second connection portion, and the second flange prevents foreign matter from entering the bearing from the other side, thereby protecting the bearing and improving the bearing's ability to prevent foreign matter from entering.
[0016] In a possible implementation of the present application, the first seal and the second seal are both alloy steel parts; and the first seal and the second seal are both interference-connected with the drive shaft.
[0017] The first and second seals of the embodiments of the present application are both made of alloy steel, which increases their rigidity, ensures they are less susceptible to deformation during use, and increases their service life. The first and second seals are secured to the drive shaft via an interference fit, which helps ensure the stability of their connection to the drive shaft.
[0018] In a possible implementation of the present application, a first retaining ring and a second retaining ring are further provided in the bearing mounting hole. Along the axial direction of the drive shaft, the first retaining ring and the second retaining ring are respectively located on both sides of the bearing and both abut against the bearing.
[0019] The embodiment of the present application arranges a first retaining ring and a second retaining ring on both sides of the bearing, and the first retaining ring and the second retaining ring respectively abut against the two sides of the bearing, so that the first retaining ring and the second retaining ring can be used to limit the position of the bearing to prevent the bearing from axial displacement during use, which is beneficial to further reduce the probability of bearing failure and ensure the normal use of the vehicle.
[0020] In a possible implementation of the present application, the bearing mounting hole includes a first hole segment and a second hole segment that are connected, the inner diameter of the first hole segment being larger than the inner diameter of the second hole segment, a first mounting groove being provided in the first hole segment, and the first retaining ring being disposed in the first mounting groove; along the axial direction of the drive shaft, a first end of the outer ring abuts against the first retaining ring, and a second end of the outer ring abuts against an end portion of the second hole segment;
[0021] The drive shaft includes a first shaft section and a second shaft section, the diameter of the first shaft end is larger than the diameter of the second shaft section, the second shaft section is provided with a second mounting groove, and the second retaining ring is arranged in the second mounting groove; along the axial direction of the drive shaft, the first end of the inner ring abuts against the end of the second shaft section, and the second end of the inner ring abuts against the second retaining ring.
[0022] In the embodiment of the present application, the outer ring of the bearing abuts against the ends of the first retaining ring and the second hole segment on both sides, thereby preventing the bearing from axial displacement during use. The inner ring of the bearing abuts against the ends of the second retaining ring and the second shaft segment on both sides, thereby preventing the bearing from axial displacement during use. This structure prevents axial displacement of the bearing during use, further reducing the probability of bearing failure, improving bearing stability, and ensuring normal vehicle operation.
[0023] In a possible implementation of the present application, both the first retaining ring and the second retaining ring are high-carbon steel retaining rings or high-carbon alloy steel retaining rings.
[0024] The first retaining ring and the second retaining ring in the embodiment of the present application are preferably made of high-carbon alloy steel retaining rings, so that the first retaining ring and the second retaining ring have higher strength, are not easily deformed during use, and improve the service life of the first retaining ring and the second retaining ring.
[0025] In a possible implementation of the present application, the inner ring is in interference connection with the drive shaft, and the outer ring is in interference connection with the bearing mounting hole.
[0026] The embodiment of the present application utilizes an interference fit to mount the bearing between the drive shaft and the drive shaft bracket. This provides a simple connection structure, eliminating the need for additional connectors. This structure not only ensures a stable connection between the drive shaft and the drive shaft bracket, but also ensures the drive shaft can withstand significant torque, ensuring power is transmitted to the wheels, while also ensuring the drive shaft has good impact load resistance.
[0027] In a possible implementation of the present application, the drive shaft bracket is further provided with a plurality of connecting through holes, and the electric drive is provided with a plurality of fixing holes. The plurality of connecting through holes corresponds one-to-one to the plurality of fixing holes, and the fasteners pass through the connecting through holes and are detachably connected to the corresponding fixing holes.
[0028] The embodiment of the present application facilitates the installation and subsequent repair and disassembly of the drive shaft bracket by detachably connecting the drive shaft bracket to the electric drive, thereby facilitating subsequent repair, maintenance or replacement.
[0029] An embodiment of the present application also provides a transmission system, comprising any drive shaft assembly as described above.
[0030] The transmission system of the embodiment of the present application adopts the above-mentioned drive shaft assembly, thereby improving the sealing performance through the above-mentioned first seal and second seal, and improving the axial limiting performance through the first retaining ring and the second retaining ring, which is beneficial to reducing the failure rate of the bearing during use and ensuring the normal use of the transmission system.
[0031] An embodiment of the present application also provides a vehicle, comprising the transmission system as described above.
[0032] The vehicle of the embodiment of the present application adopts the above-mentioned transmission system, which can improve the stability of the vehicle after long-term use and ensure the normal use of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS
[0033] Figure 1 A simplified structural diagram of a drive shaft assembly provided in one embodiment of the present application;
[0034] Figure 2 A cross-sectional view of a drive shaft assembly provided by one embodiment of the present application with the drive shaft removed;
[0035] Figure 3 for Figure 2 Axonometric drawing of
[0036] Figure 4 A schematic diagram of the partial structure of the electric drive provided in one embodiment of the present application.
[0037] Reference numerals:
[0038] 10-electric drive; 11-fixing hole;
[0039] 100 - drive shaft; 110 - first shaft section; 120 - second shaft section; 121 - second mounting slot;
[0040] 200-bearing; 210-inner ring; 220-outer ring; 230-rolling element;
[0041] 300 - drive shaft bracket; 310 - bearing mounting hole; 311 - first hole section; 3111 - first mounting slot; 312 - second hole section; 320 - connecting through hole; 330 - fastener;
[0042] 400 - first sealing member; 410 - first connecting portion; 420 - first flange;
[0043] 500 - second sealing member; 510 - second connecting portion; 520 - second flange;
[0044] 600-first retaining ring;
[0045] 700-Second retaining ring. DETAILED DESCRIPTION
[0046] To make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the specific technical solutions of the present application will be further described in detail below in conjunction with the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application but are not intended to limit the scope of the present application.
[0047] In the embodiments of this application, 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 technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of this application, unless otherwise specified, "multiple" means two or more.
[0048] In addition, in the embodiments of the present application, directional terms such as "up", "down", "left" and "right" are defined relative to the orientation of the components in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they may change accordingly according to changes in the orientation of the components in the drawings.
[0049] In the embodiments of the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integrated connection; it can be a direct connection or an indirect connection through an intermediate medium.
[0050] In the embodiments of the present application, the terms "comprises," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.
[0051] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be interpreted as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.
[0052] As described in the background, the bearings connecting the drive shaft bracket and the drive shaft in the transmission system of the related art have poor foreign object protection. After prolonged use, dust, water, sand, and other foreign objects may enter, causing bearing failure and affecting the normal use of the vehicle. Specifically, to prevent the ingress of foreign objects, the bearings in the related art are equipped with a sealing cover between the inner and outer rings. However, the transmission system is installed on the vehicle chassis and is in direct contact with the external environment during driving. Therefore, the operating environment is relatively harsh. After prolonged use, the sealing cover on the bearing is easily damaged by sand, water, and other foreign objects, causing the seal to fail, causing bearing failure and affecting the normal use of the vehicle.
[0053] In view of this, the embodiments of the present application aim to provide a drive shaft assembly, a transmission system and a vehicle, by arranging a first seal and a second seal on both sides of the bearing, in a plane perpendicular to the axial direction of the drive shaft, the projection of at least part of the bearing is located within the projection range of the first seal and the projection range of the second seal, thereby utilizing the first seal and the second seal to protect the bearing, reducing the chance of foreign matter entering the bearing during use, and ensuring the normal use of the vehicle.
[0054] Below, embodiments of the present application are described in detail with reference to the accompanying drawings. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.
[0055] The present application provides a drive shaft assembly, a transmission system, and a vehicle. It should be noted that the vehicle in this application may refer to a large car, a small car, a special-purpose vehicle, and the like. For example, based on the vehicle model, the vehicle in this application may be a sedan, an off-road vehicle, a multi-purpose vehicle (MPV), or other vehicle models. A vehicle generally comprises wheels, a body, and a transmission system disposed between the wheels and the body. The transmission system is capable of transmitting power to the wheels, thereby driving the vehicle forward. For new energy vehicles, the transmission system includes components such as an electric drive, a drive shaft, and wheels. The drive shaft connects the electric drive and the wheels, thereby transmitting the power generated by the electric drive to the wheels. The drive shaft can generally be mated to the spline structure within the electric drive via a spline structure to achieve power transmission. When the distance between the wheel and the electric drive is long, the drive shaft needs to be connected to the electric drive via a drive shaft bracket to address possible NVH issues. Specifically, the drive shaft bracket is mounted on the drive shaft via a bearing sleeve, and then the drive shaft bracket is connected and fixed to the electric drive using fasteners.
[0056] Please refer to Figure 1 , the drive shaft assembly provided in the embodiment of the present application includes:
[0057] Drive shaft 100 is used to connect the electric drive 10 and the wheels (not shown). For example, one end of the drive shaft 100 is connected to the spline structure in the electric drive 10 via a spline structure, thereby introducing power from the electric drive 10 into the drive shaft 100; the other end of the drive shaft 100 is connected to the wheels to drive the wheels to rotate.
[0058] Bearing 200 includes an inner ring 210, an outer ring 220, and multiple rolling elements 230. The inner ring 210 and outer ring 220 are rotatably connected via the rolling elements 230. The inner ring 210 is sleeved on the drive shaft 100 and rotates with the drive shaft 100. For example, the rolling elements 230 may be balls. The inner ring 210 and outer ring 220 are rotatably connected via the multiple balls. Lubricating oil is also filled between the inner ring 210 and outer ring 220 to reduce wear on the balls. To prevent ball failure, sealing caps are provided on both sides of the bearing 200, connecting the inner ring 210 and outer ring 220.
[0059] The drive shaft bracket 300 is used to connect to the electric drive 10. The drive shaft bracket 300 is also provided with a bearing mounting hole 310. The outer ring 220 is arranged in the bearing mounting hole 310. Through the above structure, the drive shaft 100 can be connected to the electric drive 10 through the drive shaft bracket 300, thereby improving the stability of the connection and improving the NVH performance of the vehicle.
[0060] Please continue to refer to Figure 1 In the embodiment of the present application, a first seal 400 and a second seal 500 are further disposed within the bearing mounting hole 310. Both the first seal 400 and the second seal 500 are fixedly connected to the drive shaft 100. Along the axial direction of the drive shaft 100, the first seal 400 and the second seal 500 are respectively located on either side of the bearing 200. In a plane perpendicular to the axial direction of the drive shaft 100, at least a portion of the projection of the bearing 200 lies within the projections of the first seal 400 and the second seal 500.
[0061] The embodiment of the present application arranges a first seal 400 and a second seal 500 on both sides of the bearing 200, and in a plane perpendicular to the axial direction of the drive shaft 100, the projection of at least part of the bearing 200 is located within the projection range of the first seal 400 and the second seal 500, so that the first seal 400 and the second seal 500 can be used to protect the bearing 200, reduce the probability of foreign matter entering the interior of the bearing 200 during use, and ensure the normal use of the vehicle.
[0062] Please continue to refer to Figure 1-Figure 3 The first sealing member 400 of the embodiment of the present application includes a first connecting portion 410 and a first flange 420. The first connecting portion 410 is generally cylindrical and has a first connecting hole therein. The first sealing member 400 is sleeved on the drive shaft 100 through the first connecting hole to achieve a fixed connection with the drive shaft 100. The first flange 420 is provided at one end of the first connecting portion 410 close to the bearing 200, and a certain gap is formed between the first flange 420 and the inner wall of the bearing mounting hole 310 to prevent interference with the bearing mounting hole 310 when the drive shaft 100 rotates. In a plane perpendicular to the axial direction of the drive shaft 100, at least part of the projection of the bearing 200 is located within the projection range of the first flange 420. It can be understood that the embodiment of the present application protects the bearing 200 through the first flange 420 to prevent foreign matter from entering the bearing 200, thereby improving the anti-foreign matter entry capability of the bearing 200.
[0063] Similarly, the second sealing member 500 of the embodiment of the present application includes a second connecting portion 510 and a second flange 520. The second connecting portion 510 is generally cylindrical and has a second connecting hole defined therein. The second sealing member 500 is sleeved onto the drive shaft 100 through the second connecting hole to achieve a fixed connection with the drive shaft 100. The second flange 520 is disposed at the end of the second connecting portion 510 proximal to the bearing 200 and has a clearance between it and the inner wall of the bearing mounting hole 310 to prevent interference with the bearing mounting hole 310 during rotation of the drive shaft 100. In a plane perpendicular to the axial direction of the drive shaft 100, at least a portion of the projection of the bearing 200 lies within the projection of the second flange 520. It is understood that the embodiment of the present application protects the bearing 200 through the second flange 520, preventing foreign matter from entering the bearing 200 and improving the bearing 200's ability to prevent foreign matter from entering the bearing 200.
[0064] In the embodiment of the present application, the first seal 400 is fixedly connected to the drive shaft 100 via the first connecting portion 410, and blocks foreign matter from entering the bearing 200 from one side via the first flange 420, thereby protecting the bearing 200 and improving the ability of the bearing 200 to prevent foreign matter from entering. The second seal 500 is fixedly connected to the drive shaft 100 via the second connecting portion 510, and blocks foreign matter from entering the bearing 200 from the other side via the second flange 520, thereby protecting the bearing 200 and improving the ability of the bearing 200 to prevent foreign matter from entering.
[0065] Furthermore, the first seal 400 and the second seal 500 of the embodiment of the present application are both made of alloy steel and are both interference-connected to the drive shaft 100 .
[0066] The first seal 400 and the second seal 500 of the embodiment of the present application are both made of alloy steel, which can improve the rigidity of the first seal 400 and the second seal 500, ensure that the first seal 400 and the second seal 500 are not easily deformed during use, and improve the service life of the first seal 400 and the second seal 500. The first seal 400 and the second seal 500 can both be integrally formed by stamping, which is conducive to improving their production efficiency. The first seal 400 and the second seal 500 are connected and fixed to the drive shaft 100 by an interference fit, which is conducive to ensuring the stability of the connection between the first seal 400 and the second seal 500 and the drive shaft 100.
[0067] Please continue to refer to Figure 1-Figure 3In order to prevent the bearing 200 from moving axially during use, the embodiment of the present application further provides a first retaining ring 600 and a second retaining ring 700 in the bearing mounting hole 310. Along the axial direction of the drive shaft 100, the first retaining ring 600 and the second retaining ring 700 are respectively located on both sides of the bearing 200 and are both in contact with the bearing 200.
[0068] The embodiment of the present application arranges a first retaining ring 600 and a second retaining ring 700 on both sides of the bearing 200. The first retaining ring 600 and the second retaining ring 700 respectively abut against the two sides of the bearing 200, so that the first retaining ring 600 and the second retaining ring 700 can be used to limit the position of the bearing 200 to prevent the bearing 200 from axial displacement during use, which is beneficial to further reduce the probability of failure of the bearing 200 and ensure the normal use of the vehicle.
[0069] Specifically, the bearing mounting hole 310 in the embodiment of the present application includes a first hole section 311 and a second hole section 312 connected to each other. The inner diameter of the first hole section 311 is larger than the inner diameter of the second hole section 312; that is, the bearing mounting hole 310 itself is a stepped hole. A first mounting groove 3111 is defined within the first hole section 311, and at least a portion of the first retaining ring 600 is disposed within the first mounting groove 3111. During installation, the first retaining ring 600 can be compressed by an external force and placed into the first mounting groove 3111. Once placed, the first retaining ring 600 forms an interference fit with the first mounting groove 3111 due to its own elastic restoring force, thereby achieving a stable connection with the first mounting groove 3111. Along the axial direction of the drive shaft 100, the first end of the outer ring 220 abuts against the first retaining ring 600, and the second end of the outer ring 220 abuts against the end of the second hole section 312. The outer ring 220 of the bearing 200 abuts against the first retaining ring 600 and the end of the second hole section 312 on both sides, thereby preventing the bearing 200 from generating axial displacement during use.
[0070] The drive shaft 100 of the present embodiment includes a first shaft section 110 and a second shaft section 120. The diameter of the first shaft end is larger than that of the second shaft section 120; in other words, the drive shaft 100 is a stepped shaft. A second mounting groove 121 is defined in the second shaft section 120, and at least a portion of the second retaining ring 700 is disposed within the second mounting groove 121. During installation, the second retaining ring 700 can be compressed by an external force and inserted into the second mounting groove 121. Once inserted, the second retaining ring 700 forms an interference fit with the second mounting groove 121 due to its own elastic restoring force, thereby achieving a stable connection with the second mounting groove 121. Along the axial direction of the drive shaft 100, the first end of the inner ring 210 abuts the end of the second shaft section 120, and the second end of the inner ring 210 abuts the second retaining ring 700. The inner ring 210 of the bearing 200 abuts the second retaining ring 700 and the end of the second shaft section 120 on both sides, thereby preventing axial displacement of the bearing 200 during use.
[0071] In the embodiment of the present application, the outer ring 220 of the bearing 200 abuts against the first retaining ring 600 and the end of the second hole segment 312 on both sides, thereby preventing the bearing 200 from axial displacement during use. The inner ring 210 of the bearing 200 abuts against the second retaining ring 700 and the end of the second shaft segment 120 on both sides, thereby preventing the bearing 200 from axial displacement during use. This structure prevents axial displacement of the bearing 200 during use, further reducing the probability of bearing 200 failure, improving the operating stability of the bearing 200, and ensuring the normal use of the vehicle.
[0072] Furthermore, the first retaining ring 600 and the second retaining ring 700 in the embodiment of the present application are both high-carbon steel retaining rings or high-carbon alloy steel retaining rings.
[0073] The first retaining ring 600 and the second retaining ring 700 of the embodiment of the present application are preferably both made of high-carbon alloy steel retaining rings, so that the first retaining ring 600 and the second retaining ring 700 have higher strength, are not easily deformed during use, and improve the service life of the first retaining ring 600 and the second retaining ring 700.
[0074] In the embodiment of the present application, the inner ring 210 is interference-connected with the drive shaft 100 , and the outer ring 220 is interference-connected with the bearing mounting hole 310 .
[0075] In this embodiment, the bearing 200 is installed between the drive shaft 100 and the drive shaft bracket 300 through an interference fit, resulting in a simple connection structure that requires no additional connectors. This structure not only ensures the stability of the connection between the drive shaft 100 and the drive shaft bracket 300, but also ensures that the drive shaft 100 can withstand high torque, ensuring power is transmitted to the wheels, and also ensures that the drive shaft 100 has good impact load resistance.
[0076] Please continue to refer to Figures 1-4 , the drive shaft bracket 300 is also provided with a plurality of connecting through holes 320, and the electric drive 10 is provided with a plurality of fixing holes 11. The plurality of connecting through holes 320 correspond one-to-one to the plurality of fixing holes 11, and the fasteners 330 are detachably connected to the corresponding fixing holes 11 after passing through the connecting through holes 320. For example, the drive shaft bracket 300 can be an aluminum alloy bracket to reduce the weight of the bracket itself, which is conducive to the lightweighting of the vehicle. The drive shaft bracket 300 of this embodiment is connected one-to-one with the two fixing holes 11 on the electric drive 10 through two connecting through holes 320. In other possible embodiments, the number of connecting through holes 320 and fixing holes 11 can also be three, four or five, etc. In the embodiment of the present application, the fixing hole 11 can be, for example, a threaded hole, and the fastener 330 can be, for example, a bolt. The fastener 330 is connected to the fixing hole 11 by a threaded connection, thereby facilitating the installation and subsequent maintenance and disassembly of the drive shaft bracket 300.
[0077] The embodiment of the present application facilitates the installation and subsequent repair and disassembly of the drive shaft bracket 300 by detachably connecting the drive shaft bracket 300 to the electric drive 10, thereby facilitating subsequent repair, maintenance or replacement.
[0078] An embodiment of the present application also provides a transmission system, including the above-mentioned drive shaft assembly.
[0079] Specifically, the transmission system includes an electric drive, a drive shaft, a drive shaft bracket and a wheel. One end of the drive shaft is connected to the spline structure in the electric drive through a spline structure, and the other end of the drive shaft is connected to the wheel, so that power can be transmitted to the wheel to drive the vehicle forward. The drive shaft is also connected to the electric drive through the drive shaft bracket, thereby improving the NVH performance of the vehicle. The drive shaft and the drive shaft bracket are connected through a bearing. The bearing has improved sealing performance through the above-mentioned first and second seals, and improved axial limiting performance through the first and second retaining rings, thereby reducing the failure rate of the bearing during use and ensuring the normal use of the transmission system.
[0080] An embodiment of the present application also provides a vehicle comprising the above-mentioned transmission system.
[0081] Specifically, the transmission system can be arranged on the rear axle of the vehicle, for example. By adopting the above transmission system, the stability of the vehicle after long-term use can be improved, and the normal use of the vehicle can be ensured.
[0082] The serial numbers of the embodiments of this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. The above are only preferred embodiments of this application and do not limit the scope of the patent of this application. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the scope of patent protection of this application.
Claims
1. A drive shaft assembly, characterized in that: include: A drive shaft (100), the drive shaft (100) being used to connect the electric drive (10) and the wheels; A bearing (200), the bearing (200) comprising an inner ring (210), an outer ring (220), and a plurality of rolling elements (230), the inner ring (210) and the outer ring (220) being rotatably connected via the plurality of rolling elements (230), and the inner ring (210) being sleeved on the drive shaft (100); A drive shaft bracket (300), the drive shaft bracket (300) is used to connect the electric drive, the drive shaft bracket (300) is further provided with a bearing mounting hole (310), and the outer ring (220) is arranged in the bearing mounting hole (310); A first seal (400) and a second seal (500) are further provided in the bearing mounting hole (310), and the first seal (400) and the second seal (500) are both fixedly connected to the drive shaft (100). Along the axial direction of the drive shaft (100), the first seal (400) and the second seal (500) are respectively located on both sides of the bearing (200); in a plane perpendicular to the axial direction of the drive shaft (100), at least part of the projection of the bearing (200) is located within the projection range of the first seal (400) and the projection range of the second seal (500).
2. The drive shaft assembly according to claim 1, wherein: The first sealing member (400) comprises a first connecting portion (410) and a first flange (420); a first connecting hole is provided in the first connecting portion (410); the first sealing member (400) is sleeved on the drive shaft (100) through the first connecting hole; the first flange (420) is provided at one end of the first connecting portion (410) close to the bearing (200); in a plane perpendicular to the axial direction of the drive shaft (100), at least a portion of the projection of the bearing (200) is located within the projection range of the first flange (420); The second sealing member (500) includes a second connecting portion (510) and a second flange (520), wherein a second connecting hole is provided in the second connecting portion (510), and the second sealing member (500) is sleeved on the drive shaft (100) through the second connecting hole, and the second flange (520) is provided at one end of the second connecting portion (510) close to the bearing (200), and in a plane perpendicular to the axial direction of the drive shaft (100), at least part of the projection of the bearing (200) is located within the projection range of the second flange (520).
3. The drive shaft assembly according to claim 2, wherein: The first sealing member (400) and the second sealing member (500) are both alloy steel members; the first sealing member (400) and the second sealing member (500) are both interference-connected with the drive shaft (100).
4. The drive shaft assembly according to any one of claims 1 to 3, characterized in that: A first retaining ring (600) and a second retaining ring (700) are further provided in the bearing mounting hole (310). Along the axial direction of the drive shaft (100), the first retaining ring (600) and the second retaining ring (700) are respectively located on both sides of the bearing (200) and are both in contact with the bearing (200).
5. The drive shaft assembly according to claim 4, wherein: The bearing mounting hole (310) comprises a first hole section (311) and a second hole section (312) connected to each other, the inner diameter of the first hole section (311) being larger than the inner diameter of the second hole section (312), a first mounting groove (3111) being provided in the first hole section (311), and the first retaining ring (600) being provided in the first mounting groove (3111); along the axial direction of the drive shaft (100), the first end of the outer ring (220) abuts against the first retaining ring (600), and the second end of the outer ring (220) abuts against the end of the second hole section (312); The drive shaft (100) comprises a first shaft section (110) and a second shaft section (120); the diameter of the first shaft section is larger than the diameter of the second shaft section (120); a second mounting groove (121) is provided on the second shaft section (120); the second retaining ring (700) is disposed in the second mounting groove (121); along the axial direction of the drive shaft (100), the first end of the inner ring (210) abuts against the end of the second shaft section (120), and the second end of the inner ring (210) abuts against the second retaining ring (700).
6. The drive shaft assembly according to claim 5, wherein: The first retaining ring (600) and the second retaining ring (700) are both high-carbon steel retaining rings or high-carbon alloy steel retaining rings.
7. The drive shaft assembly according to claim 1, wherein: The inner ring (210) is interference-connected with the drive shaft (100), and the outer ring (220) is interference-connected with the bearing mounting hole (310).
8. The drive shaft assembly according to claim 1, wherein: The drive shaft bracket (300) is further provided with a plurality of connecting through holes (320), and the electric drive (10) is provided with a plurality of fixing holes (11). The plurality of connecting through holes (320) correspond one to one with the plurality of fixing holes (11), and the fasteners (330) are detachably connected to the corresponding fixing holes (11) after passing through the connecting through holes (320).
9. A transmission system, characterized in that: Comprising the drive shaft assembly according to any one of claims 1-8.
10. A vehicle, characterized in that: Comprising the transmission system as claimed in claim 9.