High-precision large-torque new energy automobile driving motor flange structure

Abstract

The utility model discloses a high-precision large-torque new energy automobile driving motor flange structure which comprises a flange inner sleeve, a flange outer sleeve, a flange mounting plate, a first locking bolt and a second locking bolt. The flange inner sleeve is of a conical hollow structure with the outer diameter provided with an annular step, the flange outer sleeve is of a conical structure with the inner diameter provided with an annular step, and the flange inner sleeve and the flange outer sleeve are matched through a conical surface. The flange inner sleeve and the flange outer sleeve are locked through a second locking bolt; the second locking bolt penetrates through the edge, with the small inner diameter, of the flange outer sleeve and is fastened to the flange inner sleeve through an annular step between the flange inner sleeve and the flange outer sleeve. The flange installation plate is installed on one side of the second locking bolt of the flange outer sleeve, and the flange installation plate and the flange outer sleeve are connected through the first locking bolt. According to the utility model, the centering precision of the flange can be controlled within 0.01 mm, and the NVH problems of transmission vibration and the like caused by the centering precision of the flange can be effectively solved after the centering precision is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile parts, and specifically relates to a high-precision and high-torque flange structure for a new energy vehicle drive motor. Background Art

[0002] As the new energy vehicle market matures, performance requirements for new energy vehicle drive motors are increasing, particularly for overall vehicle NVH. As the power output source, new energy vehicle drive motors have the greatest impact on overall NVH. Commercial vehicle motors in new energy vehicles typically have built-in flanges for torque output. Poor centering accuracy of the flanges themselves can cause NVH issues such as transmission vibration. Currently, commonly used flange structures include splines and expansion sleeves, with the splines or expansion sleeves serving to center and lock the motor shaft. Splines can transmit high torque, but centering accuracy is limited (typically, spline concentricity is controlled to around 0.05mm). To prevent wear, they are often designed with an interference fit, making later disassembly difficult. Expansion sleeves can transmit high torque and simplify disassembly, but they require high machining precision for the conical surfaces. The centering accuracy of the inner and outer conical surfaces can fluctuate and is affected by assembly techniques. Generally, centering accuracy can be maintained within 0.03mm.

[0003] Therefore, how to improve the centering accuracy of the flange itself becomes the key to solving NVH problems such as transmission vibration. Summary of the Invention

[0004] The purpose of the utility model is to solve the above problems and provide a high-precision and high-torque flange structure.

[0005] The technical solution adopted by the utility model is: a high-precision, high-torque new energy vehicle drive motor flange structure, including a flange inner sleeve, a flange outer sleeve, a flange mounting plate, a first locking bolt and a second locking bolt; the flange inner sleeve and the flange outer sleeve are locked by the second locking bolt; the flange mounting plate is installed on one side of the second locking bolt of the flange outer sleeve, and the flange mounting plate and the flange outer sleeve are connected by the first locking bolt.

[0006] Furthermore, the flange inner sleeve is a conical hollow structure with an annular step on the outer diameter, and the flange outer sleeve is a conical structure with an annular step on the inner diameter, and the flange inner sleeve and the flange outer sleeve are matched through a conical surface.

[0007] Furthermore, the second locking bolt passes through the edge of the smaller inner diameter of the flange outer sleeve and is fastened to the flange inner sleeve through the annular step between the flange inner sleeve and the flange outer sleeve.

[0008] Furthermore, an annular boss is provided at the center of the flange mounting plate, and a clearance fit is adopted between the annular boss and the central axis.

[0009] Furthermore, the through hole on the flange mounting plate for mounting the first locking bolt is larger than the threaded hole on the flange outer sleeve for mounting the second locking bolt.

[0010] The beneficial effects of the present invention are as follows: the present invention can control the flange centering accuracy within 0.01 mm, and after improving the centering accuracy, it can effectively solve the NVH problems such as transmission vibration caused by the flange centering accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a structural sectional view of the utility model;

[0012] Figure 2 It is a side structural diagram of the utility model;

[0013] Figure 3 This is a front structural diagram of the utility model;

[0014] Figure 4 This is a schematic diagram of the structure of the flange mounting plate in the utility model;

[0015] Figure 5 This is a schematic diagram of the structure of the flange inner sleeve in the utility model;

[0016] Figure 6 This is a schematic structural diagram of the flange jacket in the present invention;

[0017] Figure 7 This is a side structural diagram of the flange jacket in the present invention;

[0018] In the figure: 1-flange inner sleeve, 2-flange outer sleeve, 3-flange mounting plate, 31-annular boss, 4-first locking bolt, 5-second locking bolt, 6-center axis. DETAILED DESCRIPTION

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] In order to more clearly illustrate the technical solution of the present invention, the following will briefly introduce the drawings required for the description. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other embodiments can be obtained based on these drawings without inventive work. In order to facilitate understanding of the present invention, the following will be described in more detail with reference to the drawings and specific embodiments.

[0021] like Figures 1 to 7 As shown, the utility model is a high-precision, high-torque flange structure, comprising a flange inner sleeve 1, a flange outer sleeve 2, a flange mounting plate 3, a first locking bolt 4 and a second locking bolt 5.

[0022] The inner flange sleeve 1 is a conical hollow structure with an annular step on its outer diameter. The outer flange sleeve 2 is a conical structure with an annular step on its inner diameter. The inner flange sleeve 1 and the outer flange sleeve 2 are mated together by a tapered surface. The inner flange sleeve 1 and the outer flange sleeve 2 are locked together by a second locking bolt 5. The second locking bolt 5 passes through the edge of the smaller inner diameter of the outer flange sleeve 2 and is fastened to the inner flange sleeve 1 via the annular step between the two sleeves. When the second locking bolt 5 is tightened, axial pressure is generated between the inner flange sleeve 1 and the outer flange sleeve 2, thereby clamping the central axis 6.

[0023] The flange mounting plate 3 is mounted on one side of the second locking bolt 5 of the flange housing 2. The flange mounting plate 3 and the flange housing 2 are connected by the first locking bolt 4. An annular boss 31 is provided at the center of the flange mounting plate 3. The annular boss 31 in the flange mounting plate 3 is clearance-fitted with the central axis 6.

[0024] The through hole on the flange mounting plate 3 for mounting the first locking bolt 4 is larger than the threaded hole on the flange sleeve 2 for mounting the second locking bolt 5 and has the ability to be slightly adjusted in the circumferential direction.

[0025] The utility model can transmit large torque. Taking a shaft diameter of 75mm as an example, it can transmit a rated torque of 4800Nm, which can meet the torque transmission requirements of common commercial vehicle motor flanges.

[0026] The installation process of the present invention is:

[0027] Step 1: Assemble the inner flange sleeve 1 and the outer flange sleeve 2 together, and install the second locking bolt 5 in advance, but do not tighten it;

[0028] Step 2: Put the flange inner sleeve 1 and flange outer sleeve 2 assembled in the first step onto the central shaft 6, and tighten the second locking bolt 5 according to the specified torque;

[0029] Step 3: Put the flange mounting plate 3 on the central shaft 6, and tighten the flange mounting plate 3 and the flange sleeve 2 with the first locking bolt 4 according to the specified torque;

[0030] The utility model has good centering accuracy and large transmission torque, and can control the flange centering accuracy within 0.01mm. After improving the centering accuracy, NVH problems such as transmission vibration caused by the flange centering accuracy can be effectively solved.

[0031] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other. The above description of the disclosed embodiments enables professionals and technicians in this field to implement or use the utility model. Various modifications to these embodiments will be obvious to professionals and technicians in this field. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high-precision, high-torque new energy vehicle drive motor flange structure, comprising a flange inner sleeve (1), a flange outer sleeve (2), a flange mounting plate (3), a first locking bolt (4) and a second locking bolt (5); characterized in that: The flange inner sleeve (1) and the flange outer sleeve (2) are locked by a second locking bolt (5); the flange mounting plate (3) is mounted on one side of the second locking bolt (5) of the flange outer sleeve (2), and the flange mounting plate (3) and the flange outer sleeve (2) are connected by a first locking bolt (4).

2. The high-precision, high-torque flange structure for a new energy vehicle drive motor according to claim 1, characterized in that: The flange inner sleeve (1) is a conical hollow structure with an annular step on its outer diameter, and the flange outer sleeve (2) is a conical structure with an annular step on its inner diameter. The flange inner sleeve (1) and the flange outer sleeve (2) are matched via a conical surface.

3. The high-precision, high-torque flange structure for a new energy vehicle drive motor according to claim 1, characterized in that: The second locking bolt (5) passes through the edge of the smaller inner diameter of the flange outer sleeve (2) and is fastened to the flange inner sleeve (1) through the annular step between the flange inner sleeve (1) and the flange outer sleeve (2).

4. The high-precision, high-torque flange structure for a new energy vehicle drive motor according to claim 1, characterized in that: An annular boss (31) is provided at the center of the flange mounting plate (3), and a clearance fit is adopted between the annular boss (31) and the central shaft (6).

5. The high-precision, high-torque flange structure for a new energy vehicle drive motor according to claim 1, characterized in that: The through hole on the flange mounting plate (3) for mounting the first locking bolt (4) is larger than the threaded hole on the flange sleeve (2) for mounting the second locking bolt (5).

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