A processing apparatus and method for an electric motor housing

Abstract

This invention discloses a processing device for motor housings, belonging to the field of motor processing technology. The processing device includes an operating table, which is a box-type structure. A mounting plate is slidably connected inside the operating table, and an expansion sleeve is mounted on the mounting plate. The expansion sleeve rotates uniformly on the mounting plate via a drive assembly. A waist hole is opened on the upper surface of the operating table to expose the expansion sleeve, and a slide is provided on one side of the upper surface of the operating table. A milling machine is slidably connected to the front surface of the slide, and an end seat is provided on the opposite side of the slide. A three-jaw chuck is mounted on the front surface of the end seat. This invention adopts a clamping method of conical wedge engagement + radial expansion. The fastening bolt drives the outer conical sleeve to slide down along the conical part of the inner conical sleeve. The outer conical sleeve expands radially evenly and squeezes the inner wall of the motor housing, achieving coaxial fixation of the workpiece. The clamping force is uniform, avoiding deformation of the motor housing due to excessive local force, while ensuring the coaxiality accuracy of the workpiece processing. The positioning sleeve overlaps with the end of the motor housing to achieve axial pre-positioning of the workpiece.

Description

Technical Field

[0001] This invention belongs to the field of motor processing technology, specifically relating to a processing device and method for motor housings. Background Technology

[0002] As the core load-bearing component of the motor, the machining accuracy of the motor housing directly determines the motor's operational stability, coaxiality, and service life.

[0003] Currently, the machining of motor housings mainly relies on traditional special fixtures and multi-equipment combination processes. Although basic machining can be achieved, there are many technical bottlenecks that are difficult to overcome. Among the existing technologies, for example, the Chinese utility model patent with authorization announcement number CN219542393U discloses a motor housing machining device, which uses a three-jaw chuck to directly clamp the outer circle of the motor housing for machining. Although this solution has a simple structure, it has obvious defects: First, it is difficult to ensure the coaxiality of the clamping. The outer circle clamping method of the three-jaw chuck is prone to workpiece eccentricity due to deviations in the outer circle size of the workpiece and clamping and alignment errors. The coaxiality deviation between the inner hole and the stop of the motor housing after machining directly affects the uniformity of the air gap after the motor is assembled, causing electromagnetic noise and vibration problems. Second, the clamping efficiency is low. It requires repeated manual alignment and adjustment. The clamping time for a single piece exceeds 5 minutes, and multiple clampings can easily accumulate errors, resulting in a decrease in yield.

[0004] To address the shortcomings of the existing technology, there is an urgent need in the field for a motor housing processing apparatus and method that features a simple structure, precise coaxial clamping, efficient and convenient clamping, and strong versatility, in order to achieve multi-process processing of motor housings in a single clamping, significantly improving processing accuracy and production efficiency while reducing equipment and labor costs. This application proposes a motor housing processing apparatus and method to overcome the deficiencies of the existing technology. Summary of the Invention

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0006] To address the problems mentioned in the background section, the present invention adopts the following technical solution.

[0007] A processing device for motor housing includes an operating table with a box-type structure. A mounting plate is slidably connected inside the operating table, and an expansion sleeve is mounted on the mounting plate. The expansion sleeve rotates uniformly on the mounting plate via a drive assembly. A slotted hole is provided on the upper surface of the operating table to expose the expansion sleeve. A slide is provided on one side of the upper surface of the operating table, and a milling machine is slidably connected to the front surface of the slide. An end seat is provided on the side opposite the slide, and a three-jaw chuck is mounted on the front surface of the end seat. The motor housing is placed on the expansion sleeve for fixation and positioned by sliding the mounting plate. The milling machine is used to process the motor housing. Furthermore, the expansion sleeve rotates uniformly via the drive assembly, and the three-jaw chuck is used to hold other cutting tools for auxiliary processing.

[0008] Preferably, the expansion sleeve includes an inner conical sleeve, an outer conical sleeve, and a fastening bolt. The fastening bolt passes through the sleeve structure formed by the inner and outer conical sleeves to achieve a fastening connection. The inner conical sleeve is divided into two parts: the lower part is a stepped structure, and the upper part is a conical structure. The outer conical sleeve is adapted to the conical part of the inner conical sleeve, and the inner surface of the inner conical sleeve is conical.

[0009] Preferably, the motor housing is upside down on the outer conical sleeve. When the fastening bolt moves downward along the axial direction, it abuts against the outer conical sleeve and slides downward along the axial direction of the inner conical sleeve. The conical part of the inner conical sleeve and the inner inclined surface of the outer conical sleeve form a wedge engagement, driving the outer conical sleeve to expand radially. After the outer conical sleeve expands, it uniformly squeezes the inner wall of the motor housing to achieve coaxial fixation of the motor housing.

[0010] Preferably, the stepped portion of the inner conical sleeve abuts against the positioning sleeve, and the positioning sleeve forms an axial gap between the stepped portion and the outer surface of the inner conical sleeve. The lower end of the outer conical sleeve is initially located in the axial gap. When the motor housing is upside down on the outer conical sleeve, the port of the motor housing overlaps the upper surface of the positioning sleeve. When the outer conical sleeve slides downward under the drive of the fastening bolt, the lower end of the outer conical sleeve gradually extends into the axial gap between the positioning sleeve and the outer surface of the inner conical sleeve.

[0011] Preferably, the upper surface of the outer conical sleeve is provided with an annular groove, and the lower surface of the upper end of the fastening bolt is provided with a matching annular protrusion. The tail of the inner conical sleeve is provided with a cavity, and a long rod hammer is provided in the cavity. The upper surface of the long rod hammer is provided with a threaded hole, which is threaded to the tail of the fastening bolt. The outer side of the long rod hammer is also provided with an annular protrusion, and the inner wall of the corresponding inner conical sleeve tail cavity is provided with a matching annular groove.

[0012] Preferably, a bottom ring is fixedly sleeved on the tail of the inner tapered sleeve, and the drive assembly is connected to the bottom ring. The drive assembly includes a motor, a worm and a worm wheel, wherein the worm and the worm wheel mesh with each other, the upper surface of the worm wheel is fixedly connected to the bottom ring, and its lower surface is provided with a bearing seat placed on the mounting plate. The drive end of the motor is connected to the end of the worm, and the motor is also fixed on the mounting plate.

[0013] Preferably, the tail of the long hammer head passes through the worm gear and the mounting plate in sequence, and both the worm gear and the mounting plate are provided with round holes, the diameter of which is larger than the diameter of the tail of the long hammer head.

[0014] Preferably, the mounting plate has a pair of symmetrical through holes, one of which is a screw hole. The operating table has a built-in limit rod and a screw, which are adapted to the through hole and the screw hole respectively. One end of the screw passes through the side of the operating table and is connected to a driver.

[0015] According to the above solution, this application also discloses a method for processing a motor housing, and a processing apparatus for the motor housing of the above technical solution, comprising the following steps: Step 1: Place the motor housing to be processed onto the expansion sleeve. Rotate the long rod hammer with a wrench. The long rod hammer will drive the fastening bolt to move downward, thereby causing the outer cone sleeve to move downward along the cone surface of the inner cone sleeve, thus tightening the outer cone sleeve to position and clamp the motor housing. Step 2: Start the driver. The driver drives the slide to slide along the operating table to adjust the position of the expansion sleeve. Step 3: Start the slide table to adjust the height of the milling machine, and start the three-jaw chuck to hold other tools; Step 4: Start the motor. The motor drives the worm gear and worm wheel to mesh and drive the expansion sleeve to rotate, which in turn causes the motor housing to rotate. Simultaneously, the milling machine and other tools held by the three-jaw chuck process the motor housing.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) In this invention, a clamping method of conical wedge engagement + radial expansion is adopted. The fastening bolt drives the outer conical sleeve to slide down along the conical part of the inner conical sleeve. The outer conical sleeve expands radially evenly and squeezes the inner wall of the motor housing to achieve coaxial fixation of the workpiece. The clamping force is uniform, avoiding deformation of the motor housing due to excessive local force. At the same time, it ensures the coaxiality accuracy of the workpiece processing. The positioning sleeve overlaps with the port of the motor housing to achieve axial pre-positioning of the workpiece. With the radial coaxial fixation of the expansion sleeve, the workpiece is accurately positioned in both axial and radial directions. This effectively avoids workpiece movement and offset during processing and improves processing accuracy. Furthermore, the clamping action of the expansion sleeve is completed by the long rod hammer head driving the fastening bolt. Through the engagement of the annular protrusion and the annular groove, the transmission stability of the fastening bolt, the outer conical sleeve, and the long rod hammer head is ensured. There is no loosening after clamping and locking, which further improves the reliability of workpiece clamping.

[0017] (2) The device in this invention has a compact and modular overall layout. The operating table is a box-type structure, with the core components such as the drive assembly and mounting plate built into the operating table. The expansion sleeve is exposed through the waist hole, which saves space and protects the internal transmission components, improving the overall stability of the device. The connection structure between the expansion sleeve and the drive assembly and mounting plate is reasonably designed. The tail of the long rod hammer head passes through the worm gear and the mounting plate, and the diameter of the round hole is larger, so that the transmission and clamping structures do not interfere with each other. The bearing seat on the lower surface of the worm gear further improves the smoothness of the expansion sleeve rotation. The mounting plate slides with the operating table through the limit rod and screw, and the sliding positioning is accurate and without deviation, which can adapt to different processing position requirements. The expansion sleeve is an integrated structure that integrates the inner cone sleeve, outer cone sleeve, positioning sleeve, long rod hammer head, fastening bolts and other components. The components are highly compatible, without additional complex tooling, and the structure is simple and easy to disassemble and maintain.

[0018] (3) The clamping and loosening of the workpiece in this invention is simple. The axial movement of the fastening bolt can be driven by simply rotating the long rod hammer head with a wrench, so as to realize the tightening and resetting of the outer cone sleeve. There is no need for complicated operation steps, which improves the efficiency of workpiece loading and unloading. The drive of each execution component is independent and simple to control. The driver and motor control the sliding of the mounting plate and the rotation of the expansion sleeve respectively. The slide table adjusts the position of the milling pin machine separately. The operation logic is clear, the professional requirements of the operator are low, and it is easy to get started. Attached Figure Description

[0019] Figure 1 This is the three-dimensional structure of the processing device for the motor housing in this invention. Figure 1 .

[0020] Figure 2 This is the three-dimensional structure of the processing device for the motor housing in this invention. Figure 2 .

[0021] Figure 3 This is a front view of the processing device for the motor housing in this invention.

[0022] Figure 4 Assembly of the expansion sleeve and its driving component in this invention Figure 1 .

[0023] Figure 2 Assembly of the expansion sleeve and its driving component in this invention Figure 6 .

[0024] Figure 1 This is a cross-sectional plan view of the expansion sleeve in this invention.

[0025] The correspondence between the labels and component names in the attached figures is as follows: 100. Operating table; 101. Expansion sleeve; 101a. Bottom ring; 101b. Inner conical sleeve; 101c. Positioning sleeve; 101d. Outer conical sleeve; 101e. Fastening bolt; 101f. Long rod hammer; 102. Mounting plate; 102a. Driver; 103. Motor; 103a. Worm gear; 103b. Worm wheel; 103c. Bearing housing; 104. Slide table; 104a. Milling machine; 105. End seat; 105a. Three-jaw chuck. Detailed Implementation

[0026] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that mutually excludes other embodiments. The present invention provides the following embodiments.

[0029] Example 1

[0030] This embodiment discloses a processing device for motor housings. The device is an integrated processing structure and is suitable for multi-process processing such as milling, chamfering, and drilling of cylindrical motor housings of different specifications.

[0031] See Figure 2 The processing device in this embodiment includes an operating table 100. The operating table 100 has a box-type hollow structure with an internal cavity for accommodating transmission and drive components. The external surface is a flat processing table. An elongated waist hole is provided on the processing table surface of the operating table 100. The length direction of the waist hole is consistent with the length direction of the operating table 100. The diameter of the waist hole is adapted to the outer diameter of the expansion sleeve 101, allowing the upper end of the expansion sleeve 101 to pass through and slide with the mounting plate 102.

[0032] See Figure 4 and Figure 3In this embodiment, a mounting plate 102 is slidably connected to the accommodating cavity of the operating table 100. A pair of through holes are symmetrically opened on the plate surface, one of which is an internal threaded screw hole and the other is a smooth hole. A limiting rod and a screw are fixedly fixed in the accommodating cavity of the operating table 100. The limiting rod passes through the smooth hole and guides and limits the sliding of the mounting plate 102. The screw is threaded into the screw hole, and one end of the screw passes horizontally through the side wall of the operating table 100. It is fixedly connected to the output end of the driver 102a through a coupling. The driver 102a is a servo motor, fixed to the outer side wall of the operating table 100, which can drive the screw to rotate in both directions, thereby driving the mounting plate 102 to slide linearly back and forth along the limiting rod.

[0033] See Figure 5 In this embodiment, the upper surface of the mounting plate 102 is equipped with an expansion sleeve 101 and a drive assembly. The drive assembly is connected to the expansion sleeve 101 for driving the expansion sleeve 101 to rotate uniformly around its own axis. (See reference...) Figure 6 and Figure 5In this embodiment, the expansion sleeve 101 is an integral conical tensioning structure, including a bottom ring 101a, an inner conical sleeve 101b, a positioning sleeve 101c, an outer conical sleeve 101d, a fastening bolt 101e, and a long hammer head 101f. The inner conical sleeve 101b is an integral stepped conical structure, with its lower half being a stepped structure with a gradually changing diameter and its upper half being a conical structure. The inner hole of the inner conical sleeve 101b is also a conical surface, which matches the inner inclined surface of the outer conical sleeve 101d; the steps of the inner conical sleeve 101b... The lower end face of the outer conical sleeve 101d abuts against a positioning sleeve 101c. The positioning sleeve 101c is an annular sleeve structure, and its inner diameter is adapted to the minimum diameter of the stepped portion of the inner conical sleeve 101b. The stepped surface of the stepped portion limits the movement, creating an annular axial gap between the inner wall of the positioning sleeve 101c and the outer surface of the inner conical sleeve 101b. The outer conical sleeve 101d is an elastic annular sleeve structure, with its inner wall being an inclined surface adapted to the conical portion of the inner conical sleeve 101b, and its outer wall being a smooth cylindrical surface. The lower end of the outer conical sleeve 101d initially... The gap is located within the axial gap formed by the positioning sleeve 101c and the inner conical sleeve 101b. An annular groove is formed on the upper surface of the outer conical sleeve 101d. The fastening bolt 101e passes through the sleeve structure formed by the inner conical sleeve 101b and the outer conical sleeve 101d. An annular protrusion, matching the annular groove on the upper surface of the outer conical sleeve 101d, protrudes from the lower surface of the bolt 101e. This annular protrusion engages with the annular groove, achieving axial engagement and circumferential rotatable fit between the fastening bolt 101e and the outer conical sleeve 101d. The inner conical sleeve 101b... The tail end has a cylindrical cavity, and a long rod hammer 101f is movably installed in the cavity. The upper surface of the long rod hammer 101f has an internal threaded hole, which engages with the external thread of the tail end of the fastening bolt 101e. The outer side wall of the long rod hammer 101f has an annular protrusion, and the inner wall of the tail end cavity of the inner cone sleeve 101b has a matching annular groove. The long rod hammer 101f achieves axial positioning and circumferential rotational engagement with the inner cone sleeve 101b through the engagement of the annular protrusion and the annular groove.

[0034] See Figure 6 and Figure 1In this embodiment, a bottom ring 101a is interference-fitted onto the outer side of the tail of the inner tapered sleeve 101b. The bottom ring 101a is a metal annular flange structure used to achieve a fixed connection between the expansion sleeve 101 and the drive assembly. The drive assembly includes a motor 103, a worm gear 103a, a worm wheel 103b, and a bearing seat 103c. The motor 103 is a geared servo motor, vertically fixed to the upper surface of the mounting plate 102. Its output end is coaxially fixedly connected to one end of the worm gear 103a. The worm gear 103a and the worm wheel 103b mesh with each other, with a transmission ratio of 1:20. The upper surface of the worm wheel 103b is fixedly connected to the lower surface of the bottom ring 101a by bolts. Next, a bearing seat 103c is coaxially provided on the lower surface of the worm gear 103b. The bearing seat 103c is a deep groove ball bearing structure, and its lower end is fixed on the mounting plate 102. It is used to provide rotational support for the worm gear 103b and the expansion sleeve 101 to ensure the coaxiality of the expansion sleeve 101 rotation. The tail of the long rod hammer 101f vertically downward passes through the worm gear 103b and the mounting plate 102 in sequence. The worm gear 103b and the mounting plate 102 are respectively provided with circular holes. The diameter of the circular holes is larger than the diameter of the tail of the long rod hammer 101f, and the gap is 2-3mm to avoid rotational interference between the long rod hammer 101f and the worm gear 103b and the mounting plate 102.

[0035] See Figure 2 and ​ In this embodiment, a slide table 104 is bolted to one side of the machining table surface of the operating table 100 along the length of the waist hole. The slide table 104 is a linear electric slide table, and its sliding direction is perpendicular to the sliding direction of the mounting plate 102. A milling machine 104a is slidably connected to the front surface of the slide table 104 via a guide rail. The milling machine 104a can slide vertically up and down along the slide table 104 to adjust the machining height. The machining end of the milling machine 104a is set towards the expansion sleeve 101 and is used to machine the motor housing on the expansion sleeve 101. The body 200 is milled; on the other side of the machining table of the operating table 100 opposite to the slide table 104, an end seat 105 is fixed by bolts. The end seat 105 is a metal support structure, and a three-jaw chuck 105a is coaxially mounted on its front surface. The clamping center of the three-jaw chuck 105a and the rotation center of the expansion sleeve 101 are on the same horizontal axis. The three-jaw chuck 105a is a manual or pneumatic chuck, which can clamp auxiliary machining tools such as drill bits, chamfering tools, and turning tools to realize multi-process auxiliary machining of the motor housing 200.

[0036] Example 2 This embodiment discloses a method for processing a motor housing, based on the motor housing processing device of Embodiment 1. This method can achieve simultaneous processing of multiple processes in a single clamping of the motor housing, effectively improving processing accuracy and efficiency. Specifically, it includes the following steps: Step 1, Clamping and Positioning the Motor Housing: The motor housing 200 to be processed is placed upside down on the outside of the outer conical sleeve 101d of the expansion sleeve 101, so that the lower end of the motor housing 200 naturally overlaps the upper surface of the positioning sleeve 101c. A rubber mallet is used to gently tap the tail of the long-handled hammer head 101f, causing the expansion sleeve 101 to vibrate slightly, making the end of the motor housing 200 fit tightly against the upper surface of the positioning sleeve 101c, completing the axial pre-positioning. Then, a wrench is engaged with the tail of the long-handled hammer head 101f, and the long-handled hammer head 101f is rotated clockwise. The fastening bolt 101e is driven to move axially downward through the threaded transmission. The fastening bolt 101e abuts against the outer conical sleeve 101d through the annular protrusion, causing the outer conical sleeve 101d to slide downward synchronously along the conical surface of the inner conical sleeve 101b. The conical part of the inner conical sleeve 101b weds into the inner inclined surface of the outer conical sleeve 101d, causing the outer conical sleeve 101d to undergo radial elastic expansion until the outer wall of the outer conical sleeve 101d is tightly fitted with the inner wall of the motor housing 200, thereby achieving radial coaxial fixation of the motor housing 200. The expansion force is evenly applied to the inner wall of the motor housing 200, with no local stress concentration. Step 2, Adjust the machining position: According to the machining process requirements of the motor housing 200, start the driver 102a. The driver 102a drives the screw to rotate forward or reverse, causing the mounting plate 102 to slide linearly along the limit rod within the operating table 100. This, in turn, causes the expansion sleeve 101 and the clamped motor housing 200 to move along the direction of the waist hole until the machining part of the motor housing 200 is aligned with the machining end of the milling machine 104a and the clamping center of the three-jaw chuck 105a. Then, turn off the driver 102a to complete the precise adjustment of the machining position. After adjustment, the position of the mounting plate 102 is locked, with no sliding or offset. Step 3, Debug the processing components: Start the drive motor of the slide table 104. According to the processing height requirements of the motor housing 200, adjust the milling machine 104a to slide up and down along the slide table 104 until the processing end of the milling machine 104a reaches the preset processing height, and lock the sliding position of the milling machine 104a. According to the auxiliary processing requirements, clamp the corresponding auxiliary tools (such as chamfering tools, drill bits) on the three-jaw chuck 105a, adjust the clamping jaws of the three-jaw chuck 105a so that the processing end of the auxiliary tool is aligned with the part to be processed in the motor housing 200, and ensure the processing coordination between the auxiliary tool and the milling machine 104a. Step 4, synchronous machining of the motor housing: First, start the milling machine 104a to make the machining end of the milling machine 104a rotate at high speed. Then start the motor 103. The motor 103 drives the worm gear 103a to rotate. Through the meshing transmission between the worm gear 103a and the worm wheel 103b, the worm wheel 103b is driven to rotate at a constant speed. Then, through the bottom ring 101a, the expansion sleeve 101 is driven to rotate at a constant speed around its own axis. The expansion sleeve 101 drives the clamped motor housing 200 to rotate synchronously. The rotation speed is 30-60 r / min. During the rotation of the motor housing 200, the machining end of the milling machine 104a performs milling on it. At the same time, the auxiliary tool held on the three-jaw chuck 105a performs auxiliary machining such as chamfering, drilling, and trimming on the motor housing 200, so as to realize the synchronous completion of multiple processes in one clamping. Step 5, Disassembling the finished product: After all the processing steps of the motor housing 200 are completed, first turn off the milling machine 104a and the motor 103, so that the motor housing 200 stops rotating and the milling machine 104a stops processing; then, attach the wrench to the tail of the long rod hammer 101f, rotate the long rod hammer 101f counterclockwise, and drive the fastening bolt 101e to move upward along the axis. The outer cone sleeve 101d loses the resistance of the fastening bolt 101e and radially contracts and resets under its own elasticity, releasing the clamping and fixing of the inner wall of the motor housing 200; finally, directly remove the processed motor housing 200 from the outer cone sleeve 101d to complete the entire processing process.

[0037] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted herein.

Claims

1. A processing device for motor housing, comprising an operating table (100), the operating table (100) having a box-type structure, characterized in that: An installation plate (102) is slidably connected inside the operating table (100). An expansion sleeve (101) is mounted on the installation plate (102). The expansion sleeve (101) rotates uniformly on the installation plate (102) via a drive assembly. A waist hole is provided on the upper surface of the operating table (100) to expose the expansion sleeve (101). A slide table (104) is provided on one side of the upper surface of the operating table (100). A milling machine (104a) is slidably connected to the front surface of the slide table (104). 104) An end seat (105) is provided on the opposite side. A three-jaw chuck (105a) is installed on the front surface of the end seat (105). The motor housing (200) is fixed on the expansion sleeve (101) and positioned by sliding the mounting plate (102). The motor housing (200) is processed by the milling machine (104a). Furthermore, the expansion sleeve (101) rotates at a constant speed through the drive assembly and other tools are clamped by the three-jaw chuck (105a) for auxiliary processing.

2. The processing apparatus for the motor housing according to claim 1, characterized in that: The expansion sleeve (101) includes an inner conical sleeve (101b), an outer conical sleeve (101d), and a fastening bolt (101e). The fastening bolt (101e) passes through the sleeve structure formed by the inner conical sleeve (101b) and the outer conical sleeve (101d) to achieve a fastening connection. The inner conical sleeve (101b) is divided into two parts, the lower half of which is a stepped structure and the upper half of which is a conical structure. The outer conical sleeve (101d) is adapted to the conical part of the inner conical sleeve (101b), and the inner surface of the inner conical sleeve (101b) is conical.

3. The processing apparatus for motor housing according to claim 2, characterized in that: The motor housing (200) is upside down on the outer conical sleeve (101d). When the fastening bolt (101e) moves downward along the axial direction, it abuts against the outer conical sleeve (101d) and slides downward along the axial direction of the inner conical sleeve (101b). The conical part of the inner conical sleeve (101b) and the inner inclined surface of the outer conical sleeve (101d) form a wedge engagement, driving the outer conical sleeve (101d) to expand radially. After the outer conical sleeve (101d) expands, it uniformly squeezes the inner wall of the motor housing (200) to achieve coaxial fixation of the motor housing (200).

4. The processing apparatus for the motor housing according to claim 3, characterized in that: The stepped portion of the inner conical sleeve (101b) abuts against the positioning sleeve (101c). The positioning sleeve (101c) forms an axial gap with the outer surface of the inner conical sleeve (101b) through the stepped portion. The lower end of the outer conical sleeve (101d) is initially located in the axial gap. When the motor housing (200) is upside down on the outer conical sleeve (101d), the port of the motor housing (200) overlaps the upper surface of the positioning sleeve (101c). When the outer conical sleeve (101d) slides downward under the drive of the fastening bolt (101e), the lower end of the outer conical sleeve (101d) gradually extends into the axial gap between the positioning sleeve (101c) and the outer surface of the inner conical sleeve (101b).

5. The processing apparatus for the motor housing according to claim 4, characterized in that: The outer conical sleeve (101d) has an annular groove on its upper surface, and the upper end of the fastening bolt (101e) has a matching annular protrusion on its lower surface. The inner conical sleeve (101b) has a cavity at its tail, and a long rod hammer (101f) is provided in the cavity. The upper surface of the long rod hammer (101f) has a threaded hole, which is threaded to the tail of the fastening bolt (101e). The outer side of the long rod hammer (101f) also has an annular protrusion, and the inner wall of the cavity at the tail of the inner conical sleeve (101b) has a matching annular groove.

6. The processing apparatus for motor housing according to claim 5, characterized in that: The inner conical sleeve (101b) is externally fixedly sleeved with a bottom ring (101a), and the drive assembly is connected to the bottom ring (101a). The drive assembly includes a motor (103), a worm (103a), and a worm wheel (103b). The worm (103a) and the worm wheel (103b) mesh with each other. The upper surface of the worm wheel (103b) is fixedly connected to the bottom ring (101a), and its lower surface is provided with a bearing seat (103c) placed on the mounting plate (102). The drive end of the motor (103) is connected to the end of the worm (103a), and the motor (103) is also fixed on the mounting plate (102).

7. The processing apparatus for motor housing according to claim 5, characterized in that: The tail of the long-handled hammer (101f) passes through the worm gear (103b) and the mounting plate (102) in sequence, and both the worm gear (103b) and the mounting plate (102) are provided with round holes, the diameter of which is larger than the diameter of the tail of the long-handled hammer (101f).

8. The processing apparatus for motor housing according to claim 1, characterized in that: The mounting plate (102) is provided with a pair of through holes symmetrically, one of which is a screw hole. The operating table (100) has a built-in limit rod and a screw rod, and the limit rod and the screw rod are respectively adapted to the through hole and the screw hole. One end of the screw rod passes through the side of the operating table (100) and is connected to a driver (102a).

9. A method for processing an electric motor housing, used to operate the processing apparatus for an electric motor housing according to any one of claims 1-8, characterized in that, Includes the following steps: Step 1: Place the motor housing (200) to be processed onto the expansion sleeve (101). Rotate the long rod hammer (101f) with a wrench. The long rod hammer (101f) drives the fastening bolt (101e) to move downward, thereby causing the outer cone sleeve (101d) to move downward along the cone surface of the inner cone sleeve (101b), thereby causing the outer cone sleeve (101d) to tighten and position and clamp the motor housing (200). Step 2: Start the driver (102a). The driver (102a) drives the slide (104) to slide along the operating table (100) to adjust the position of the expansion sleeve (101). Step 3: Start the slide (104) to adjust the height of the milling machine (104a), and start the three-jaw chuck (105a) to hold other tools; Step 4: Start the motor (103). The motor (103) drives the worm (103a) and worm wheel (103b) to mesh and drive, causing the expansion sleeve (101) to rotate, thereby causing the motor housing (200) to rotate. Simultaneously, the milling machine (104a) and the other tools held by the three-jaw chuck (105a) process the motor housing (200).

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