A power head mechanism for precise correction of the center hole of shaft parts
The power head mechanism addresses the inaccuracy in correcting motor shaft center holes by using an axial drive assembly and motion conversion mechanism to align the center hole, end face, and outer circle with the theoretical mass center, improving processing accuracy and stability for electric vehicle motors.
Patent Information
- Application Number
- CN202311451296.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-03
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2043-11-03
AI Technical Summary
Existing machining tools fail to accurately correct the center hole, end face, and outer circle of motor shafts relative to the theoretical mass center, compromising processing accuracy and stability, especially in high-speed rotating applications.
A power head mechanism with a spindle housing, tool driving device, and feed tool, utilizing an axial drive assembly, inclined tongue, and motion conversion mechanism to precisely correct the center hole, end face, and outer circle of motor shafts, ensuring alignment with the theoretical mass center.
Enhances processing accuracy and stability by enabling precise correction of the center hole, end face, and outer circle of motor shafts, meeting the requirements for high-speed rotation without vibration in electric vehicle motors.
Smart Images
Figure CN117161678B_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of mechanical cutting and processing, and in particular to a power head mechanism for precise correction of the center hole of shaft parts. Background Art
[0002] The shaft is used to support transmission parts and transmit torque or motion. The shaft needs to bear loads during operation and ensure a certain rotation accuracy. The machining surfaces of shaft parts usually include inner cylindrical surfaces, outer cylindrical surfaces, inner conical surfaces, outer conical surfaces, step planes, end planes, threads, splines, keyways and grooves. Among them, the high-speed rotating shaft parts are mostly in the form of cylindrical rotating bodies, and the main machining method is turning. During turning, the remaining imbalance of the finished part can be controlled by coinciding or concentrically aligning the clamping process datum with the mass center of the workpiece. In order to enable high-speed rotating shaft parts to have higher rotation accuracy and stability, requirements for imbalance are put forward in the technical requirements.
[0003] With the rapid development of new energy vehicles, electric vehicles widely use electric motors to drive the operation of electric vehicles. This requires that the motor rotates smoothly without vibration. In order to achieve this goal, the motor shaft imbalance must be extremely small. Therefore, in the process of motor shaft processing, the center hole, end face and outer circle of the motor shaft are required to be corrected relative to the theoretical mass center to ensure the processing accuracy. Summary of the invention
[0004] In order to solve the problem that the center hole correction power head mechanism of the existing machining machine tools cannot properly meet the requirements of correcting the center hole, end face and outer circle of the motor shaft relative to the theoretical mass center to ensure the machining accuracy, a key component of a machine tool specially used for correcting the center hole, end face and outer circle of the precision motor shaft according to the mass center is provided. The present invention proposes a power head mechanism for precise correction of the center hole of shaft parts.
[0005] The present invention proposes the following scheme:
[0006] A power head mechanism for precision correction of the center hole of shaft parts, comprising a spindle housing, a tool driving device and a feed tool;
[0007] The tool driving device includes a rotating disk main body connected to the spindle housing for driving the feed tool to rotate, an axial driving component arranged in the spindle housing for driving the feed tool to move axially relative to the rotating disk main body, a first driving component for rotating the rotating disk main body relative to the spindle housing, and a second driving component for driving the feed tool to move axially when the feed tool rotates with the rotating disk main body. When the feed tool moves axially, the feed tool is displaced obliquely relative to the rotation axis of the rotating disk main body.
[0008] In the power head mechanism for precise correction of the center hole of shaft parts as described above, the axial drive assembly is transmission-connected with the second drive assembly, and the second drive assembly is provided with an inclined tongue at the end away from the axial drive assembly, and the inclined tongue is used to drive the feed tool to feed.
[0009] As described above, in a power head mechanism for precise correction of the center hole of a shaft part, the feed tool includes a feed tool holder movably connected to the oblique tongue and a feed tool head arranged at the end of the feed tool holder. When the feed tool holder makes an oblique motion relative to the rotation axis of the flat rotating disk body, the feed tool head is driven to feed.
[0010] In the power head mechanism for precise correction of the center hole of shaft parts as described above, the inclined tongue and the feed tool holder are perpendicular to each other, and the moving direction of the feed tool holder forms an angle of 30° with the rotation axis of the flat rotating disk body.
[0011] As described above, in a power head mechanism for precise correction of the center hole of a shaft part, the spindle housing is connected to a feed drive device at the end away from the tool drive device, and the feed drive device includes a drive motor and a motion conversion mechanism, and the motion conversion mechanism is used to convert the rotational motion of the drive axial drive component into axial movement.
[0012] As described above, a power head mechanism for precise correction of the center hole of a shaft part, the motion conversion mechanism includes a ball screw, a ball nut sleeved on the ball screw and rotatably matched with the ball screw, a sliding sleeve fixedly connected to the ball nut, and a bearing connecting the sliding sleeve and the spindle housing.
[0013] In the power head mechanism for precise correction of the center hole of a shaft-type part as described above, a fixing flange is sleeved on the motion conversion mechanism, and the fixing flange is fixedly connected to the spindle housing and the motion conversion mechanism.
[0014] As described above, in a power head mechanism for precise correction of the center hole of a shaft-type part, a guide key is provided on the fixed flange. When the drive motor rotates, it drives the ball screw to rotate, and the ball nut rotates in coordination with the ball screw. Under the action of the guide key, the sleeve cooperates with the ball nut for axial movement, and the sleeve drives the axial drive assembly of the spindle housing to move axially through the bearing.
[0015] In the power head mechanism for precise correction of the center hole of a shaft-type part as described above, a coupling is provided between the output shaft of the driving motor and the ball screw.
[0016] Compared with the prior art, the present invention has the following beneficial effects:
[0017] The embodiment of the present invention is connected to the axial drive component of the spindle housing through a tool drive device, and then connected to the feed tool through one end of the tool drive device. When the axial drive component moves axially, the tool drive device is driven to move axially to drive the feed tool to feed, which can better meet the requirements of correcting the theoretical mass center of the center hole, end face and outer circle of the motor shaft, thereby ensuring the processing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0019] Figure 1 The schematic diagram of the power head mechanism for precise correction of the center hole of shaft parts according to the embodiment of the present invention is Figure 1 .
[0020] Figure 2 The schematic diagram of the power head mechanism for precise correction of the center hole of shaft parts according to the embodiment of the present invention is Figure 2 .
[0021] Figure 3 yes Figure 2 Schematic diagram of the overall longitudinal section.
[0022] Figure 4 yes Figure 3 An enlarged schematic diagram of part A in FIG.
[0023] Figure 5 yes Figure 2 Schematic diagram of tool action in . DETAILED DESCRIPTION
[0024] Please refer to Figures 1 to 5 As shown, this embodiment proposes a power head mechanism for precise correction of the center hole of shaft parts, including a spindle housing 1, a tool driving device 2, a feed tool 3 and a feed driving device 4.
[0025] As a preferred solution rather than a specific limitation, the tool driving device 2 includes a flat disk body 22 connected to the spindle housing 1 for driving the feed tool 3 to rotate, and an axial driving component 11 arranged in the spindle housing 1 for driving the feed tool 3 to move axially relative to the flat disk body 22. The spindle housing 1 is provided with a first driving component 12 for rotating the flat disk body 22 relative to the spindle housing 1, and a second driving component 21 for driving the feed tool 3 to move axially when the feed tool 3 rotates with the flat disk body 22. When the feed tool 3 moves axially, the feed tool 3 is obliquely displaced relative to the rotation axis of the flat disk body 22.
[0026] This embodiment is connected to the axial drive component of the spindle housing through a tool drive device, and then connected to the feed tool through one end of the tool drive device. When the axial drive component moves axially, the tool drive device is driven to move axially to drive the feed tool to feed, which can better meet the requirements of correcting the theoretical mass center of the center hole, end face and outer circle of the motor shaft, thereby ensuring the processing accuracy.
[0027] The principle of the present invention is:
[0028] The driving motor 41 on the feed drive device 4 rotates to output power, and then the rotational motion of the driving motor 41 is converted into linear motion through the motion conversion mechanism 42, and then the linear motion is transmitted to the central axis of the spindle housing 1 through the bearing 44. The central axis is also called a connecting tappet. The axial movement of the central axis drives the second driving component 21 to move axially. The second driving component 21 is provided with an inclined tongue 211, which is connected to the feed tool holder 31 through the inclined tongue 211, and then the tool holder drives the feed cutter head 32 to move axially. The feed tool holder 31 and the rotation axis of the flat rotating disk body 22 form an angle of 30°, so that the processed plane is as shown in FIG. Figure 5 As shown, the center hole, end face and outer circle of the motor shaft can be corrected relative to the theoretical mass center to ensure the processing accuracy.
[0029] As a preferred solution rather than a specific limitation, the axial drive assembly 11 is transmission-connected to the second drive assembly 21. The second drive assembly 21 is provided with an inclined tongue 211 at one end away from the axial drive assembly 11. The inclined tongue 211 is used to drive the feed tool 3 to feed.
[0030] In this embodiment, a second driving assembly 21 is provided which is transmission-connected with the axial driving assembly 11, and an inclined tongue 211 is provided at the end of the second driving assembly 21 to drive the feeding tool 3 to feed, so that the feeding tool 3 can better complete the feeding movement.
[0031] As a preferred solution rather than a specific limitation, the feed tool 3 includes a feed tool holder 31 movably connected to the inclined tongue 211 and a feed tool head 32 arranged at the end of the feed tool holder 31. When the feed tool holder 31 makes an oblique motion relative to the rotation axis of the turntable body 22, the feed tool head 32 is driven to feed.
[0032] In addition to the flat rotating disk body 22 that rotates the feed tool 3, the tool driving device 2 of this embodiment is also provided with a feed tool holder 31 that allows the tool to move axially, and the feed tool head 32 is arranged on the feed tool holder 31 to make the axial movement smoother, more reliable and more stable. The feed tool holder 31 of this embodiment is provided with a groove for movably connecting with the inclined tongue 211. When the inclined tongue 211 is extended into or pulled out of the groove, the oblique movement of the feed tool holder 31 is completed.
[0033] As a preferred solution rather than a specific limitation, the inclined tongue 211 and the feed tool holder 31 are perpendicular to each other, and the moving direction of the feed tool holder 31 forms an angle of 30° with the rotation axis of the flat rotating disk body 22 .
[0034] In this embodiment, the feed tool holder 31 is arranged at an angle of 30° with the rotation axis of the flat turntable body 22, so that the feed tool holder 31 can be rotated as shown in FIG. Figure 5 The processing scheme shown can make the positioning of shaft parts processing process more accurate, and can better meet the correction of the center hole, end face and outer circle of the motor shaft relative to the theoretical mass center, so as to ensure the processing accuracy.
[0035] As a preferred solution rather than a specific limitation, the spindle housing 1 is connected to a feed drive device 4 at one end away from the tool drive device 2. The feed drive device 4 includes a drive motor 41 and a motion conversion mechanism 42. The motion conversion mechanism 42 is used to convert the rotational motion of the output shaft of the drive motor 41 into axial movement.
[0036] In this embodiment, a driving motor 41 is provided to perform driving action, and a motion conversion mechanism 42 is used to convert the rotational motion into the axial motion, so that the motion conversion efficiency is higher and the reliability is stronger.
[0037] As a preferred solution rather than a specific limitation, the motion conversion mechanism 42 includes a ball screw 421, a ball nut 422 sleeved on the ball screw 421 and rotatably matched with the ball screw 421, a sleeve 423 fixedly connected to the ball nut 422, and a bearing 44 connecting the sleeve 423 and the spindle housing 1.
[0038] This embodiment uses the movement coordination of the ball screw 421 and the ball nut 422 and the prescribed connection through the connecting sleeve 423 to make the conversion of rotational motion into linear motion more stable and reliable, and the added sleeve 423 drives the movement of the connected mechanism, thereby enhancing reliability.
[0039] As a preferred solution but not a specific limitation, a fixing flange 43 is sleeved on the motion conversion mechanism 42 , and the fixing flange 43 is fixedly connected to the spindle housing 1 and the motion conversion mechanism 42 .
[0040] In this embodiment, a fixing flange 43 is sleeved on the motion conversion mechanism 42 and the fixing flange 43 is fixed to the spindle housing 1, so that the connection between the spindle housing 1 and the motion conversion mechanism 42 is more stable and reliable, the transmission process is more stable, and the reliability is stronger.
[0041] As a preferred solution rather than a specific limitation, a guide key 431 is provided on the fixed flange 43. When the drive motor 41 rotates, the ball screw 421 is driven to rotate, and the ball nut 422 rotates in coordination with the ball screw 421. Under the action of the guide key 431, the sleeve 423 cooperates with the ball nut 422 for axial movement. The sleeve 423 drives the axial drive assembly 11 of the spindle housing 1 to move axially through the bearing 44.
[0042] In this embodiment, a guide key 431 is provided on the fixing flange 43, so that the sliding sleeve 423 cannot rotate under the restriction of the guide key 431 and can only make axial movement, so that the process of converting rotation into axial movement is smoother and more reliable.
[0043] As a preferred solution but not a specific limitation, a coupling 411 is provided between the output shaft of the driving motor 41 and the ball screw 421 .
[0044] In this embodiment, the output shaft of the driving motor 41 and the ball screw 421 are connected via the coupling 411 , which has higher reliability and better stability.
[0045] The above is an implementation method provided in combination with specific content, and it is not considered that the specific implementation of this application is limited to these descriptions. Any similarity or similarity with the method, structure, etc. of this application, or a number of technical deductions or replacements made based on the concept of this application, should be considered as the protection scope of this application.
Claims
1. A power head mechanism for precise correction of the center hole of shaft parts, characterized in that: It comprises a spindle housing (1), a tool driving device (2) and a feed tool (3); The tool driving device (2) comprises a flat disk body (22) connected to the spindle housing (1) for driving the feed tool (3) to rotate, and an axial driving component (11) arranged in the spindle housing (1) for driving the feed tool (3) to move axially relative to the flat disk body (22). The spindle housing (1) is provided with a first driving component (12) for rotating the flat disk body (22) relative to the spindle housing (1), and a second driving component (21) for driving the feed tool (3) to move axially when the feed tool (3) rotates with the flat disk body (22). When the feed tool (3) moves axially, the feed tool (3) is obliquely displaced relative to the rotation axis of the flat disk body (22). The axial drive assembly (11) is drivingly connected to the second drive assembly (21); the second drive assembly (21) is provided with an inclined tongue (211) at one end away from the axial drive assembly (11); the inclined tongue (211) is used to drive the feed tool (3) to perform a feeding movement; The feed tool (3) comprises a feed tool holder (31) movably connected to the oblique tongue (211) and a feed tool head (32) arranged at the end of the feed tool holder (31), and when the feed tool holder (31) performs an oblique motion relative to the rotation axis of the flat rotating disk body (22), the feed tool head (32) is driven to perform a feeding motion; The spindle housing (1) is connected to a feed drive device (4) at one end away from the tool drive device (2), the feed drive device (4) comprising a drive motor (41) and a motion conversion mechanism (42), the motion conversion mechanism (42) being used to convert the rotational motion of the output shaft of the drive motor (41) into axial movement; The motion conversion mechanism (42) comprises a ball screw (421), a ball nut (422) sleeved on the ball screw (421) and rotatably matched with the ball screw (421), a sliding sleeve (423) fixedly connected to the ball nut (422), and a bearing (44) connecting the sliding sleeve (423) and the spindle housing (1); A fixing flange (43) is sleeved on the motion conversion mechanism (42), and the fixing flange (43) is fixedly connected to the spindle housing (1) and the motion conversion mechanism (42); The fixing flange (43) is provided with a guide key (431). When the driving motor (41) rotates, the ball screw (421) is driven to rotate. The ball nut (422) and the ball screw (421) are rotationally matched. Under the action of the guide key (431), the sliding sleeve (423) cooperates with the ball nut (422) to move axially. The sliding sleeve (423) drives the axial driving component (11) of the spindle housing (1) to move axially through the bearing (44). A coupling (411) is provided between the output shaft of the drive motor (41) and the ball screw (421); The output shaft of the drive motor (41), the coupling (411), the ball screw (421), the ball nut (422), the sleeve (423), the bearing (44), the axial drive assembly (11), the second drive assembly (21), and the flat rotating disk body (22) are coaxially arranged.
2. A power head mechanism for precise correction of the center hole of shaft parts according to claim 1, characterized in that: The inclined tongue (211) and the feed tool holder (31) are perpendicular to each other, and the moving direction of the feed tool holder (31) forms an angle of 30° with the rotation axis of the flat rotating disk body (22).