Bearing for input shaft in new energy gearbox

Abstract

The utility model discloses a bearing for an input shaft in a new energy gear box, which comprises a bearing inner ring, a bearing outer ring and a bearing inner ring, a first annular channel is arranged on the inner side of the bearing inner ring, and the curvature coefficient of the first annular channel is 0.51-0.515; a second annular channel is formed in the inner side of the bearing outer ring, and the curvature coefficient of the second annular channel ranges from 0.529 to 0.530; a hardened layer structure is arranged on the surface of the bearing inner ring or the bearing outer ring, the thickness of the hardened layer structure is 0.5-0.6 mm, and the hardness range of the hardened layer structure is 63-66 HR; a plurality of steel balls are supported and arranged between the first annular channel and the second annular channel through the retainer, and the center diameter of the retainer is larger than that of a standard retainer so as to increase the rated dynamic and static load of the retainer; the retainer is made of a plastic material; and the diameter range of the steel balls is phi 15.87 to 15.88 mm.

Description

Technical Field

[0001] The utility model relates to the field of bearing manufacturing, in particular to a bearing for an input shaft in a new energy gear box. Background Art

[0002] Automobile gearbox is commonly known as transmission. Its actual function is to be a transmission device used by automobiles to coordinate the engine speed and the actual driving speed of the wheels. Its stability, safety and speed-changing ability are important characteristics that affect automobile driving. As the main control system of the transmission, the motor bearings must withstand large radial forces, axial forces and instantaneous starting torques.

[0003] In order to adapt to the needs of new energy gearboxes, deep groove bearings with conventional structures need to be redesigned to meet the performance requirements of gearbox motors for bearings. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the purpose of the utility model is to provide a bearing for the input shaft in a new energy gearbox to meet the requirements of the input shaft bearing in the new energy gearbox for high speed, high load and long life.

[0005] A bearing for an input shaft in a new energy gearbox, comprising:

[0006] A bearing inner ring, a first annular groove is arranged on the inner side of the bearing inner ring, and the curvature coefficient of the first annular groove is 0.51-0.515;

[0007] A bearing outer ring, wherein a second annular groove is disposed on the inner side of the bearing outer ring, and a curvature coefficient of the second annular groove is 0.529-0.530;

[0008] The surface of the bearing inner ring or the bearing outer ring is provided with a hardened layer structure, the thickness of the hardened layer structure is 0.5-0.6 mm, and the hardness range is 63-66HR;

[0009] A plurality of steel balls are supported and arranged between the first annular groove and the second annular groove by a cage, wherein the cage center diameter of the cage is larger than the standard cage center diameter to increase the rated dynamic and static loads of the cage;

[0010] The retainer is made of plastic, and the plastic surface contacts the surface of the steel ball to reduce friction;

[0011] The diameter of the steel ball is larger than the standard diameter, and the diameter range of the steel ball is Φ15.87-15.88 mm.

[0012] In a preferred embodiment of the present invention, the hardened layer structure is a hardened layer structure obtained by carbonitriding heat treatment.

[0013] In a preferred embodiment of the present invention, the center diameter of the retainer is Φ58 mm.

[0014] In a preferred embodiment of the present invention, the retaining frame is made of PA46-GF30 granular material.

[0015] In a preferred embodiment of the present invention, the steel ball is made of high carbon chromium bearing steel.

[0016] The beneficial effects of the utility model are:

[0017] The bearing for the input shaft in the new energy gearbox of the utility model can meet the requirements of the working conditions of the bearing for the input shaft in the new energy gearbox for high speed, high load and long life of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below through the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the scope of the utility model. In addition, in the following structure, the description of the well-known structure and technology is omitted to avoid unnecessary confusion of the concept of the utility model.

[0020] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or component referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0021] The carbonitriding heat treatment in the utility model refers to a chemical surface heat treatment process, which aims to simultaneously infiltrate carbon and nitrogen elements into the surface of steel parts. This treatment is mainly carburizing, and a small amount of nitrogen is infiltrated at the same time to form a carbonitride layer. These compound layers, such as Fe3C, Fe4N, Fe2-3(C,N), etc., have excellent properties such as high hardness, high wear resistance, high corrosion resistance and high fatigue life, thereby significantly improving the surface properties of metal materials.

[0022] The process flow of carbonitriding treatment usually includes pretreatment, infiltration, quenching and post-treatment. In the early days, carbonitriding process often used cyanide salt or cyanide atmosphere as the infiltrant, so it was also called "cyaniding". According to the state of the infiltration medium, carbonitriding can be divided into three categories: gas, liquid and solid, but solid and liquid carbonitriding are rarely used now.

[0023] This processing technology is widely used in many fields, including automotive parts (such as crankshafts, valves, camshafts, etc.), cutting tools (such as drills, milling cutters, etc.), molds (such as extrusion molds, hot forging molds, etc.), textile parts, machine tool parts, petroleum machinery parts and various other parts.

[0024] The PA46-GF30 particle material in this utility model refers to:

[0025] PA46-GF30 particles PA46 plus 30% glass fiber TE250F6 DSM PA46 of the Netherlands.

[0026] Important parameters: Density: 1.68g / cm3 Water absorption: 1.6% Molding shrinkage: 1.1% Notched impact strength: 10 Flexural modulus: 11000MPa Heat deformation temperature: 290℃.

[0027] like Figure 1 A bearing for an input shaft in a new energy gearbox is shown, comprising a bearing inner ring 100, and a first annular groove 110 is arranged on the inner side of the bearing inner ring 100. The curvature coefficient of the first annular groove 110 is 0.51-0.515, and preferably 0.51 in the embodiment.

[0028] A second annular channel 210 is disposed on the inner side of the bearing outer ring 200 . The curvature coefficient of the second annular channel 210 is 0.529-0.530, and is preferably 0.529 in the embodiment.

[0029] In order to improve the overall surface wear resistance and thus increase the bearing life, the surface of the bearing inner ring 100 or the bearing outer ring 200 is provided with a hardened layer structure 101 and 201, the thickness of the hardened layer structure 101 and 201 is 0.5-0.6mm, and the hardness range is 63066HR.

[0030] The hardened layer structures 101 and 201 are hardened layer structures obtained by carbonitriding heat treatment.

[0031] A plurality of steel balls 300 are supported by a retaining frame 400 and disposed between the first annular channel 110 and the second annular channel 210 . The diameter of the steel balls 300 is larger than the diameter of a standard steel ball, and the diameter of the steel balls 300 is Φ15.875 mm.

[0032] The steel ball 300 is made of high carbon chromium bearing steel.

[0033] The cage center diameter 401 of the cage 400 is larger than the standard cage center diameter to increase the rated dynamic and static load of the cage 400, and the cage center diameter of the cage 400 is Φ58mm. The cage 400 is made of plastic, and the plastic surface contacts the surface of the steel ball 300 to reduce friction;

[0034] The specific retainer 400 is made of PA46-GF30 granular material.

[0035] The bearing for the input shaft in the new energy gearbox of the utility model can meet the requirements of the working conditions of the bearing for the input shaft in the new energy gearbox for high speed, high load and long life of the bearing.

[0036] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above.

[0037] Those skilled in the art should understand that the present invention is not limited by the above-mentioned embodiments. The above-mentioned embodiments and the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection of the present invention shall be defined by the attached claims and their equivalents.

Claims

1. A bearing for an input shaft in a new energy gearbox, characterized in that: include: A bearing inner ring, a first annular groove is arranged on the inner side of the bearing inner ring, and the curvature coefficient of the first annular groove is 0.51-0.515; A bearing outer ring, wherein a second annular groove is disposed on the inner side of the bearing outer ring, and a curvature coefficient of the second annular groove is 0.529-0.530; The surface of the bearing inner ring or the bearing outer ring is provided with a hardened layer structure, the thickness of the hardened layer structure is 0.5-0.6 mm, and the hardness range is 63-66HR; A plurality of steel balls are supported and arranged between the first annular groove and the second annular groove by a retainer, and the retainer center diameter of the retainer is Φ58mm; The retainer is made of plastic, and the plastic surface contacts the surface of the steel ball to reduce friction; The diameter of the steel ball ranges from Φ15.87 to 15.88 mm.

2. A bearing for an input shaft in a new energy gearbox as claimed in claim 1, characterized in that: The hardened layer structure is a hardened layer structure obtained by carbonitriding heat treatment.

3. A bearing for an input shaft in a new energy gearbox as claimed in claim 1, characterized in that: The retaining frame is made of PA46-GF30 granular material.

4. A bearing for an input shaft in a new energy gearbox as claimed in claim 1, characterized in that: The steel ball is made of high carbon chromium bearing steel.

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