Adjustable deep hole machining structure for new energy main drive motor shaft

Abstract

The application provides an adjustable deep hole machining structure for a new energy main drive motor shaft, which is used for machining the inner hole of the motor shaft. The machining structure comprises a vertically arranged seat body that can be lifted, and a gun drill located below the seat body. A clamping seat is assembled at the bottom of the seat body, and a lower center is assembled in the clamping seat, and a through hole is arranged in the lower center for the gun drill to pass through. A limiting slide rail is arranged on the seat body, and an adjusting seat is slidably assembled on the limiting slide rail. An upper center opposite to the lower center is assembled below the adjusting seat, and the adjusting seat is driven by an upper oil cylinder. The adjustable deep hole machining structure has the following advantages: high machining efficiency, high machining precision, stable and reliable machining, and flexible and convenient operation. Through the machining structure provided by the application, the machining quality and production efficiency of the inner hole of the motor shaft can be effectively improved, and the needs of specific applications can be met.

Description

Technical Field

[0001] This invention belongs to the field of motor shaft internal hole cutting structure, specifically relating to an adjustable deep hole machining structure for a new energy main drive motor shaft. Background Technology

[0002] With the increasing popularity of new energy vehicles, the performance requirements for motor shafts are becoming increasingly stringent. To meet the high-speed, high-torque requirements of new energy vehicle motors, motor shafts are designed with a hollow form to facilitate weight reduction and internal cooling. Deep hole machining is one of the key processes to achieve this goal. However, in existing deep hole machining technologies, the problem of unstable workpiece clamping persists, leading to a decrease in machining accuracy and failing to meet the high requirements for coaxiality and dynamic balance of the motor shaft's inner bore.

[0003] Therefore, based on some of the situations in the prior art described above, this application has made further designs and improvements. Summary of the Invention

[0004] To address the shortcomings of the existing technology, this invention provides an adjustable deep hole machining structure for the main drive motor shaft of new energy vehicles, which can solve the problems of low accuracy in coaxiality and dynamic balance in deep hole machining in the existing technology.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution.

[0006] This invention provides an adjustable deep hole machining structure for the shaft of a new energy main drive motor, used for machining the inner hole of the motor shaft. The machining structure includes a vertically oriented, liftable base and a gun drill located below the base. A clamping seat is fitted at the bottom of the base, and a lower center is fitted inside the clamping seat, with a through hole for the gun drill to pass through. A limit rail is provided on the base, and an adjusting seat is slidably mounted on the limit rail. An upper center, opposite to the lower center, is fitted below the adjusting seat, and the adjusting seat is driven by an upper hydraulic cylinder.

[0007] In a preferred embodiment of the adjustable deep hole machining structure, the clamping seat includes a mounting block, a clamping block, and a clamping plate. The mounting block is assembled and fixed to the seat body, the lower center is assembled inside the clamping block, the clamping plate is mounted on the clamping block, and the clamping plate is provided with a clamping through hole for the motor shaft to pass through. The mounting block has an assembly through groove in the middle, and the groove opening above the assembly through groove is a flared structure. The clamping block is provided with a boss, and the side of the boss has an inverted frustum structure that matches the flared structure.

[0008] In a preferred embodiment of the adjustable deep hole machining structure, the angle α between the flare and the horizontal plane is 55°~75°.

[0009] In a preferred embodiment of the adjustable deep hole machining structure, a deformation groove is provided on the side of the clamping block at the opening of the boss.

[0010] In a preferred embodiment of the adjustable deep hole machining structure, the assembly through groove has a limiting step at the flared end, and the limiting step is located inside the cavity of the deformation groove.

[0011] In a preferred embodiment of the adjustable deep hole machining structure, a slot is provided on the side of the clamping block, and the slot is located below the deformation slot.

[0012] In a preferred embodiment of the adjustable deep hole machining structure, the ratio of the diameter of the through hole to the diameter of the inner hole is 1.15 to 1.3.

[0013] The adjustable deep hole machining structure of this invention has the following advantages: high machining efficiency, high machining accuracy, stable and reliable machining, and flexible and convenient operation. The machining structure provided by this invention can effectively improve the machining quality and production efficiency of motor shaft inner holes, meeting the needs of specific applications. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of an adjustable deep hole machining structure.

[0015] Figure 2 This is a schematic diagram of the clamping seat.

[0016] Figure 3 This is a schematic diagram of the structure at the deformation groove.

[0017] The following is an explanation of the markings in the accompanying drawings.

[0018] 1. Base; 11. Gun drill; 12. Limiting slide rail; 2. Adjusting seat; 21. Upper center; 22. Upper cylinder; 3. Clamping seat; 31. Lower center; 311. Through hole; 32. Mounting block; 321. Limiting step; 33. Clamping block; 331. Boss; 332. Deformation groove; 333. Empty groove; 34. Clamping piece; 4. Motor shaft; 41. Inner hole. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0020] In the following embodiments, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0021] In the description of this invention, it should be understood that terms such as center, longitudinal, transverse, length, width, thickness, upper, lower, front, rear, left, right, vertical, horizontal, top, bottom, inner, outer, clockwise, counterclockwise, etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing and simplifying the description of this invention; therefore, they should not be construed as limiting this invention. Furthermore, terms such as first, second, etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features shown. In the description of this invention, unless otherwise expressly specified and limited, terms such as installation, connection, linking, etc., should be interpreted broadly, and those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] refer to Figure 1 An adjustable deep-hole machining structure is provided for machining the inner hole 41 of the motor shaft 4, used for machining the main drive motor shaft 4. The machining structure includes a vertically oriented, liftable base 1 and a gun drill 11 located below the base 1. A clamping seat 3 is mounted at the bottom of the base 1, and a lower center 31 is mounted inside the clamping seat 3. A through hole 311 for the gun drill 11 to pass through is provided in the lower center 31. A limiting slide rail 12 is provided on the base 1, and an adjusting seat 2 is slidably mounted on the limiting slide rail 12. An upper center 21, opposite to the lower center 31, is mounted below the adjusting seat 2. The adjusting seat 2 is driven by an upper hydraulic cylinder 22. The vertical clamping design helps improve machining efficiency and accuracy.

[0023] The adjustable deep hole machining structure of this invention achieves efficient machining of the inner hole 41 of the motor shaft 4 through a reasonable combination of a base 1, a gun drill 11, a clamping seat 3, a center, and an adjusting seat 2. The liftable base 1 and the gun drill 11 located below it make machining operations more convenient and efficient, allowing for rapid machining of the inner hole and improving machining efficiency. The lower center 31 and clamping plate 34 within the clamping seat 3 ensure stable clamping and accurate positioning of the workpiece, making the machining process more precise and reliable. This clamping structure effectively prevents workpiece movement or instability during machining, ensuring axial accuracy and balance, improving machining quality and performance, and guaranteeing the accuracy and reliability of the machining results. The up-and-down movement of the adjusting seat 2 is driven by the upper hydraulic cylinder 22, realizing the adjustment and control of the position of the upper center 21, meeting the high requirements for coaxiality and dynamic balance of the inner hole 41 of the motor shaft 4.

[0024] As a preferred embodiment of the present invention, such as Figure 2 and 3As shown, the clamping seat 3 includes a mounting block 32, a clamping block 33, and a clamping plate 34. The mounting block 32 is assembled and fixed to the seat body 1. The lower center 31 is assembled inside the clamping block 33. The clamping plate 34 is mounted on the clamping block 33 and has a clamping through hole for the motor shaft 4 to pass through, which helps to ensure stable clamping and accurate positioning of the workpiece. The mounting block 32 has an assembly through groove in the middle, and the groove opening above the assembly through groove is a flared structure. The clamping block 33 has a boss 331, and the side of the boss 331 is an inverted frustum structure that matches the flared structure. The combination of the clamping block 33 and the flared structure prevents the clamping seat from loosening or shifting during operation, ensuring the reliability and stability of the clamping seat. The cooperation between the boss 331 and the flared structure enhances the stability and clamping effect of the clamping block 33.

[0025] Specifically, the flared opening has an inclined angle α with the horizontal plane. The function of the inclined angle α is as follows: the motor shaft 4 presses down and generates pressure on the clamping block; the mounting block, due to the inclined angle α of the flared structure, generates a reaction force on the clamping block; the clamping block, due to the reaction force, drives the clamping plate to generate a radial clamping force, thus clamping the motor shaft. The clamping force depends on two factors: the angle of the inclined angle α and the magnitude of the pressure applied to the motor shaft. If the angle of the inclined angle α is too small, the clamping force will be insufficient. If the angle of the inclined angle α is too large, it will cause wear or even deformation of the clamping block and the flared surface. To ensure the clamping force and stability of the fixture on the motor shaft 4, the inclined angle α is selected to be between 55° and 75°.

[0026] The clamping block 33 has a deformation groove 332 on its side at the opening of the boss 331. The deformation groove 332 allows for elastic deformation of the clamping block 33 and adapts to clamping requirements of different workpiece sizes, improving clamping flexibility and adaptability. The assembly slot has a limiting step 321 at its flared end, located within the cavity of the deformation groove 332, limiting and stabilizing the assembly slot at the flared end. Specifically, the clamping block 33 has a hollow groove 333 on its side, located below the deformation groove 332. This allows for storage of space below the deformation groove 332, preventing the deformation of the deformation groove 332 from affecting the clamping action and the assembly between the clamping block 33 and the assembly block, thus improving the stability and machining accuracy of the clamping block 33.

[0027] Preferably, the ratio of the diameter of the through hole 311 to the diameter of the inner hole 41 is 1.15 to 1.3, so that there is a certain gap between the through hole 311 and the drill bit of the gun drill 11 to discharge the waste chips generated during drilling, while taking into account the structural strength of the tip of the lower center used to fix the motor shaft, and avoiding damage to the tip of the lower center due to excessive torque during drilling.

[0028] This invention achieves precise clamping and stability of the clamping through hole through the combination of the flared structure and the inverted frustum structure. The setting of the deformation groove 332 and the limiting step 321 gives the clamping block 33 a certain elastic deformation capability, providing better clamping effect and stability. The setting of the empty groove 333 can reduce the weight of the clamping block 33 and realize storage space below the deformation groove 332, improving the stability and machining accuracy of the clamping block 33.

[0029] The working principle of this invention is as follows: First, the workpiece is placed on the lower center 31. The upper cylinder 22 pushes the upper center 21 to press down on the workpiece. After the workpiece is subjected to downward pressure, the clamping plate 34 contracts in the center until the workpiece is clamped. The gun drill 11 rotates, and at the same time, the servo motor moves the entire adjustable deep hole machining structure downward through the lead screw to complete the cutting of the inner hole 41.

[0030] Through innovative design of the clamping and fixing structure, this invention enables precise clamping and fixing of the motor shaft, preventing shaft misalignment during machining. This invention can machine holes ranging from 8mm to 50mm in diameter. The upper center 21 employs an adjustable structure, meeting the maximum requirement of 0.1mm coaxiality and 3g dynamic balance for the inner hole 41 of the motor shaft 4. The machining structure provided by this invention effectively improves the machining quality and production efficiency of the inner hole 41 of the motor shaft 4, meeting the needs of specific applications.

[0031] The scope of protection of this invention includes, but is not limited to, the above embodiments. The scope of protection of this invention is defined by the claims. Any substitutions, modifications, or improvements to this technology that are easily conceived by those skilled in the art fall within the scope of protection of this invention.

Claims

1. An adjustable deep hole machining structure for the main drive motor shaft of a new energy vehicle, used for machining the inner hole (41) of the motor shaft (4); characterized in that, The processing structure includes a vertically mounted base (1) that can be raised and lowered, and a gun drill (11) located below the base (1). The bottom of the base (1) is equipped with a clamping seat (3), and the clamping seat (3) is equipped with a lower center (31); the lower center (31) is provided with a through hole (311) for the gun drill (11) to pass through. The seat (1) is provided with a limiting slide rail (12), and an adjusting seat (2) is slidably mounted on the limiting slide rail (12). An upper center (21) opposite to the lower center (31) is mounted below the adjusting seat (2). The adjusting seat (2) is driven by an upper oil cylinder (22). The clamping seat (3) includes a mounting block (32), a clamping block (33), and a clamping plate (34); the mounting block (32) is assembled and fixed to the seat body (1), the lower center (31) is assembled inside the clamping block (33), the clamping plate (34) is covered on the clamping block (33), and the clamping plate (34) is provided with a clamping through hole through which the motor shaft (4) passes; The mounting block (32) has an assembly through groove in the middle, and the groove opening above the assembly through groove is a flared structure; the clamping block (33) has a boss (331), and the side of the boss (331) is an inverted frustum structure that matches the flared structure. The angle α between the flared opening and the horizontal plane is 55°~75°; the side of the clamping block (33) is provided with a deformation groove (332) at the opening of the boss (331); the ratio of the diameter of the through hole (311) to the diameter of the inner hole (41) is 1.15~1.3; The assembly through slot has a limiting step (321) at the flared end, and the limiting step (321) is located in the cavity of the deformation slot (332); the clamping block (33) has a slot (333) on its side, and the slot (333) is located below the deformation slot (332).

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