A stator and housing press fitting device

Abstract

The application relates to the technical field of motor tooling, in particular to a stator and shell press-fitting tooling device, which aims to solve the problems of low efficiency and easy missing of manual stator screw tightening. The device comprises a rack, a workbench, a press-fitting mechanism, a stator fixing seat, a screw tightening mechanism, and a brush handle spring guiding mechanism can be additionally arranged; the positioning column of the stator fixing seat is matched with the shell positioning seat to ensure that the stator, the shell and the through hole are coaxial; after the press-fitting mechanism drives the stator and the shell to be press-fitted, the axial driving part of the screw tightening mechanism drives the motor and the batch head to be butt-jointed with the pre-positioned tightening screw, the motor drives the screw to be tightly screwed; the brush handle spring guiding mechanism can automatically complete the assembly of the tension spring and the brush handle. The device automatically connects the processes of press-fitting, screw tightening, brush handle spring assembly and the like, multiple positioning guarantees the assembly precision, the sensor and the controller are linked to realize a closed loop of the process, the assembly efficiency and the quality stability are improved, the defects of manual operation are avoided, and the batch production demand is met.

Description

Technical Field

[0001] This application relates to the field of motor component assembly tooling technology, and more specifically, to a tooling device for press-fitting a stator and a housing. Background Technology

[0002] In the production and assembly process of electric motors, the pressing of the stator to the housing, the assembly of the brush holders and tension springs are key processes to ensure the stability and reliability of motor operation. The assembly accuracy and efficiency directly affect the overall performance indicators of the motor and the progress of mass production. Currently, the stator-housing pressing device uses a pressing mechanism to press the stator into the housing according to the preset assembly accuracy to ensure the structural stability and coaxiality requirements between the two.

[0003] However, after the existing stator and housing press-fitting process is completed, additional manual tightening of the stator screws is required to further strengthen the connection between the stator and housing and prevent relative displacement of the stator and housing due to vibration and other factors during motor operation. However, the existing manual screw tightening step is a separate process, requiring operators to wait beside the press-fitting equipment until the pressing is complete, then manually align and tighten each screw one by one. This process not only increases the number of steps and prolongs the assembly cycle of a single product, but also, in mass production scenarios, the speed limitation of manual operation restricts the overall production line's capacity, making it difficult to meet the demands of high-efficiency production. Furthermore, due to the reliance on manual screw tightening, stator screws are easily missed during actual production due to human factors such as operator fatigue, concentration, and adherence to work procedures. Once a screw is missed, the connection strength between the stator and housing will not meet design requirements. Vibration during motor operation will cause the stator to loosen, leading to abnormal motor noise, performance degradation, and in severe cases, even damage to the internal structure of the motor, ultimately resulting in complete product failure, causing economic losses and brand reputation risks for the company. Utility Model Content

[0004] In view of this, this application provides a tooling device for press-fitting the stator and the housing, which aims to solve the problems existing in the current assembly process: manually tightening the stator screws is not only inefficient, but also poses a risk of product failure due to missing screws.

[0005] This application provides a tooling device for press-fitting a stator and a housing. The closed end of the housing is provided with a first assembly hole, and the stator is provided with a second assembly hole. Both the first assembly hole and the second assembly hole are used for screwing with fastening screws.

[0006] The tooling includes:

[0007] frame;

[0008] The working platform is fixedly connected to the frame;

[0009] A pressing mechanism includes a pressing drive component, which is mounted on the frame and is used to apply force to the closed end of the housing to press the stator into the housing along the open end.

[0010] A stator fixing seat includes a positioning column and a housing positioning seat. One end of the positioning column is fixedly connected to the working platform, and the other end of the positioning column is used to position and limit the stator. The housing positioning seat is connected to the working platform through a telescopic column. The housing positioning seat has an installation hole, and the positioning column passes through the installation hole. The housing positioning seat is used to abut and position with the open end of the housing, so that the housing and the stator, the first assembly hole and the second assembly hole are coaxially arranged.

[0011] A screw fastening mechanism includes a screw positioning sleeve and a fastening drive assembly. The screw positioning sleeve is mounted on the working platform and has an axially connected screw receiving cavity and a bit receiving cavity inside. The screw receiving cavity is used to pre-accommodate and position the head of the fastening screw. The screw positioning sleeve passes through the mounting hole and is coaxially arranged with the first assembly hole of the housing mounted on the housing positioning seat. The fastening drive assembly is located on the side of the working platform away from the pressing mechanism. The fastening drive assembly includes an axial drive component, a motor, and a bit. The axial drive component is mounted on the frame and its output end is connected to the motor. The output end of the motor is connected to the bit. The bit is coaxial with the screw positioning sleeve and is used to connect with the head of the fastening screw.

[0012] After the housing and the stator are assembled, the axial drive member drives the motor to move the bit along the extension direction of the bit receiving cavity towards the side close to the pressing mechanism until the bit is connected to the head of the fastening screw. Then, the motor drives the bit to rotate the fastening screw, so as to realize the screw fastening of the fastening screw with the first mounting hole and the second mounting hole.

[0013] Preferably, the housing has a first through hole;

[0014] The tooling device also includes a brush holder spring mechanism, which includes at least one spring assembly. The spring assembly includes a sliding shaft, a shaft drive, a brush holder, and a spring drive. The cylindrical wall of the positioning post is provided with a radially extending sliding groove. The sliding shaft is disposed in the sliding groove and slidably connected to the positioning post. The shaft drive is used to drive the sliding shaft to slide outward from the positioning post and extend beyond the first end of the sliding shaft. The first end of the sliding shaft is used to pre-fit the tension spring of the stator. The brush holder is movably sleeved with the output end of the spring drive. The brush holder and the first through hole are interference-fitted. The output end of the spring drive is provided with a flange. The flange abuts against the end face of the brush holder axially away from the housing. The spring drive is used to drive the brush holder to reciprocate between the inside and outside of the housing through the first through hole. When moving towards the inside of the housing, the brush holder moves synchronously through the flange.

[0015] Preferably, the positioning column has an axially extending air passage inside, the air passage is connected to the sliding groove hole, the shaft drive component is an air compressor, and the air outlet of the air compressor is connected to the air passage.

[0016] Preferably, the axial drive component includes a cylinder and a motor platform, the output end of the cylinder is fixedly connected to the motor platform, and the motor is fixedly connected to the motor platform.

[0017] Preferably, the telescopic column includes a support column, which is fixedly connected to the working platform. The housing positioning seat is slidably connected to the support column, and the support column is fitted with a spring to enable the housing positioning seat to return to its initial position after moving along a first direction.

[0018] Preferably, the pressing mechanism further includes a pressing contact plate, the output end of the pressing drive is connected to the pressing contact plate, the pressing contact plate is used to abut against the closed end of the housing, and the plate surface area of ​​the pressing contact plate is larger than the end surface area of ​​the closed end of the housing.

[0019] Preferably, the device further includes a controller and a sensor group, the sensor group including a first sensor, a second sensor, a third sensor, a fourth sensor, a fifth sensor, a sixth sensor, and a seventh sensor. The first sensor is used to detect whether the fastening screw has been placed in the screw receiving cavity of the screw positioning sleeve; the second sensor is used to detect whether the stator has completed its pre-positioning and is in a preset position ready for press-fitting; the third sensor is used to detect whether the housing has completed its pre-positioning and is in a preset position ready for press-fitting; the fourth sensor is used to detect whether the housing has completed press-fitting with the stator and reached a preset assembly position; the fifth sensor is used to detect whether the brush holder has completed its tension spring sleeve action and reached a preset assembly position; the sixth sensor is used to detect whether the fastening screw has completed its pre-positioning and is in a preset position ready to be screwed into the stator and the housing; the seventh sensor is used to detect whether the fastening screw has been fully screwed in and reached a preset tightening state. The controller is connected to the sensor group, the press-fitting drive, the shaft drive, the spring drive, the axial drive, and the motor.

[0020] Preferably, the sliding shaft is provided with a radial groove, and a fixed shaft is provided in the groove. The fixed shaft is fixedly connected to the positioning post to restrict the movement of the sliding shaft.

[0021] Preferably, the housing positioning seat is embedded with a housing limiting seat, the housing limiting seat is provided with a passage hole coaxial with the mounting hole, and the positioning post passes through the passage hole;

[0022] The housing opening has a protruding structure, and the housing limiting seat is provided with a housing positioning groove that cooperates with the protruding structure.

[0023] Preferably, the output end of the spring drive is further provided with a groove for accommodating the tension spring.

[0024] Compared with the prior art, the tooling device for press-fitting the stator and housing provided in this application achieves at least the following beneficial effects:

[0025] First, the press-fitting contact plate connected to the output end of the press-fitting drive component of the press-fitting mechanism can directly abut against the closed end of the housing. By driving the press-fitting contact plate to apply pressure to the housing, the housing and stator are directly pushed to complete coaxial assembly without manual assistance. After assembly, the axial drive component of the screw fastening mechanism drives the motor and the screw bit to move along the screw bit receiving cavity of the screw positioning sleeve. Since the screw receiving cavity inside the screw positioning sleeve has pre-positioned the head of the fastening screw, and the design of the screw receiving cavity cross-section being larger than the screw receiving cavity cross-section facilitates screw placement and guides the screw bit, the screw bit can accurately connect with the head of the fastening screw. Subsequently, the motor drives the screw bit to rotate, completing the screw connection and fastening with the first and second assembly holes. The press-fitting and screw fastening processes are automatically connected, eliminating the steps of manual transfer, positioning, and fastening, significantly shortening the assembly cycle and improving overall work efficiency.

[0026] Secondly, the positioning pins of the stator fixing seat pass through the stator and are fixedly connected to the work platform, providing a stable positioning reference for the press-fitting process and preventing the stator from shifting during press-fitting. The housing positioning seat is connected to the work platform through telescopic pins, and its embedded housing limiting seat has a housing positioning groove that matches the protruding structure at the opening end of the housing. It can tightly abut against the opening end of the housing and limit the radial displacement of the housing. At the same time, the screw positioning sleeve installed on the work platform is coaxial with the first assembly hole of the housing and the second assembly hole of the stator, further calibrating the fastening screw assembly reference of the stator and the housing. Multiple positioning works together to ensure that the housing and the stator do not shift during the entire press-fitting process, significantly improving the assembly accuracy.

[0027] Furthermore, the automated design of the brush grip spring mechanism not only reduces operational difficulty but also effectively avoids the risk of assembly damage. In the spring assembly of this mechanism, the positioning post has an air passage communicating with the sliding slot hole. The shaft drive component can drive the sliding shaft to extend outward along the sliding slot hole through the air passage. The radial groove of the sliding shaft, in conjunction with the fixed shaft, restricts its stroke and prevents excessive displacement. The first end of the extended sliding shaft can be pre-fitted with the stator's tension spring, providing stable support for the tension spring. The output end of the spring drive component has a flange and a groove; the flange can engage with the brush grip spring. The end face of the brush holder, which is axially away from the housing, abuts against the housing to ensure that the brush holder moves synchronously when the spring drive drives the brush holder through the first through hole in the housing. The groove can accommodate the tension spring. When the brush holder moves towards the inside of the housing and pushes against the sliding shaft, the sliding shaft retracts, causing the tension spring to lose support and then seamlessly transfer to the outer circumference of the brush holder. This process completely replaces the manual installation operation of overcoming the large tension of the tension spring, avoiding the collision and friction damage to the brush holder surface that may occur when manually using tools for installation, ensuring the fitting accuracy between the brush holder and the carbon brush, and reducing the labor intensity of manual labor.

[0028] In addition, the telescopic column achieves automatic reset of the housing positioning seat after press-fitting via springs, eliminating the need for manual adjustment and simplifying the operation process; the controller and position sensor work together to precisely control the timing of the press-fitting drive components, shaft drive components, spring drive components, axial drive components and motor, ensuring orderly connection of each process; the power output of components such as the air compressor-driven sliding shaft and the cylinder-driven motor platform is stable, reducing quality fluctuations caused by manual intervention, ensuring consistent assembly quality, and stably meeting the high-efficiency assembly requirements in mass production scenarios.

[0029] Of course, any product implementing this application need not specifically need to achieve all of the technical effects described above at the same time.

[0030] Other features and advantages of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0031] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present application and, together with their description, serve to explain the principles of the present application.

[0032] Figure 1 The figure shown is a three-dimensional structural schematic diagram of the tooling device for press-fitting the stator and housing provided in an embodiment of this application;

[0033] Figure 2 As shown Figure 1 Schematic diagram showing the positional relationship between the intermediate pressure assembly mechanism, stator fixing seat, and screw fastening mechanism;

[0034] Figure 3 The image shown is a cross-sectional view of the housing and stator after press-fitting.

[0035] Figure 4 The diagram shown is a structural schematic of the screw fastening mechanism in an embodiment of this application;

[0036] Figure 5 The diagram shown is a structural schematic of the stator fixing base in an embodiment of this application;

[0037] Figure 6 The diagram shown is a schematic diagram of the assembly structure of the fastening screw in an embodiment of this application;

[0038] Figure 7 The diagram shown is a structural schematic of the brush gripping spring mechanism in an embodiment of this application;

[0039] Figure 8 As shown Figure 7 Enlarged view of a portion of point A in the middle;

[0040] Figure 9 The diagram shown is a structural schematic of the positioning column in an embodiment of this application.

[0041] Explanation of reference numerals in the attached figures:

[0042] 10-Stator, 11-Second Assembly Hole, 20-Housing, 21-First Assembly Hole, 22-First Through Hole, 40-Fasting Screw, 200-Pressure Fitting Mechanism, 210-Pressure Fitting Drive Component, 220-Pressure Fitting Contact Plate, 300-Stator Fixing Seat, 310-Positioning Column, 320-Housing Positioning Seat, 321-Housing Limit Seat, 3211-Pass-through Hole, 322-Mounting Hole, 330-Telescopic Column, 331-Support Column, 400-Screw Fastening Machine Components: 410-Axial drive component, 411-Axial cylinder, 412-Drive bracket, 420-Motor, 430-Screw bit, 440-Screw positioning sleeve, 441-Limiting sleeve, 500-Brush grip spring mechanism, 510-Sliding shaft, 511-Sliding groove, 520-Shaft drive component, 521-Air passage, 530-Brush grip, 531-Groove, 540-Spring drive component, 541-Flange, 610-Frame, 620-Working platform. Detailed Implementation

[0043] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present application.

[0044] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the scope of this application and its application or use.

[0045] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0046] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0047] Various modifications and variations can be made to this application without departing from its spirit or scope, which will be apparent to those skilled in the art. Therefore, this application is intended to cover modifications and variations falling within the scope of the corresponding claims (the claimed technical solutions) and their equivalents. It should be noted that the embodiments provided in this application can be combined with each other without contradiction.

[0048] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0049] Figure 1 The figure shown is a three-dimensional structural schematic diagram of the tooling device for press-fitting the stator and housing according to an embodiment of this application. Figure 2 As shown Figure 1 A schematic diagram showing the positional relationship between the intermediate pressure mounting mechanism, the stator fixing seat, and the screw fastening mechanism. Figure 3 The image shown is a cross-sectional view of the housing and stator after press-fitting. Figure 4 The diagram shown is a structural schematic of the screw fastening mechanism in an embodiment of this application. Figure 5 The diagram shown is a structural schematic of the stator fixing base in an embodiment of this application. Figure 6 The diagram shown is a schematic representation of the brush gripping spring mechanism in an embodiment of this application.

[0050] Please refer to Figures 1 to 6 This application provides a tooling device for press-fitting a stator and a housing, used to press the stator 10 into the housing 20 from the open end of the housing 20. The closed end of the housing is provided with a first assembly hole 21, and the stator 10 is provided with a second assembly hole 11. Both the first assembly hole 21 and the second assembly hole 11 are used to screw together with fastening screws 40.

[0051] The tooling device includes a frame 610, a working platform 620, a pressing mechanism 200, a stator fixing seat 300, and a screw fastening mechanism 400.

[0052] The work platform 620 is fixedly connected to the frame 610;

[0053] The pressing mechanism 200 includes a pressing drive 210, which is mounted on the frame 610. The output end of the pressing drive 210 is used to apply force to the closed end of the housing 20 so that the stator 10 is pressed in along the open end of the housing 20.

[0054] The stator fixing seat 300 includes a positioning post 310 and a housing positioning seat 320. One end of the positioning post 310 is fixedly connected to the working platform 620, and the other end of the positioning post 310 is used to position and limit the stator 10. The housing positioning seat 320 is connected to the working platform 620 through a telescopic post 330. The housing positioning seat 320 has an installation hole 322, and the positioning post 310 passes through the installation hole 322. The housing positioning seat 320 is used to abut and position the open end of the housing 20 so that the housing 20 and the stator 10 are coaxial, and the first assembly hole 21 and the second assembly hole 11 are coaxial.

[0055] The screw fastening mechanism 400 includes a screw positioning sleeve 440 and a fastening drive assembly. The screw positioning sleeve 440 is mounted on the work platform 620. The screw positioning sleeve 440 has an axially connected screw receiving cavity and a bit receiving cavity. The screw receiving cavity is used to pre-accommodate and position the head of the fastening screw 40. The screw positioning sleeve 440 passes through the mounting hole 322 and is coaxially arranged with the first assembly hole 21 of the housing 20 mounted on the housing positioning seat 320. The fastening drive assembly is located on the side of the work platform 620 away from the pressing mechanism 200. The fastening drive assembly includes an axial drive member 410, a motor 420, and a bit 430. The axial drive member 410 is mounted on the frame 610 and its output end is connected to the motor 420. The output end of the motor 420 is connected to the bit 430. The bit 430 is coaxial with the screw positioning sleeve 440 and is used to connect with the head of the fastening screw 40.

[0056] After the housing 20 and stator 10 are assembled, the axial drive component 410 drives the motor 420 to move the bit 430 along the extension direction of the bit receiving cavity toward the side close to the pressing mechanism 200 until the bit 430 is connected to the head of the fastening screw 40. Then, the motor 420 drives the bit 430 to rotate the fastening screw 40, so as to realize the screw fastening of the fastening screw 40 with the first mounting hole 21 and the second mounting hole 11.

[0057] In specific implementation, the axial drive component 410 can be powered by pneumatic, hydraulic, or electric means, and may include a cylinder, hydraulic cylinder, electric telescopic rod, and / or a transmission mechanism consisting of a motor, lead screw, gear rack, and pulley. This application embodiment does not impose specific limitations on this, as long as it can drive the axial drive component 410 to drive the motor 420 and the bit 430 to extend into the opening end of the housing 20.

[0058] In one specific embodiment, to ensure the reliability of the connection between the axial drive component 410 and the motor 420, the axial drive component 410 and the motor 420 are connected through a drive bracket 412. Specifically, the output end of the axial cylinder 411 is connected to a drive bracket 412, and the motor 420 is mounted on the drive bracket 412.

[0059] It should be understood that, in order to prevent the fastening screw 40 from axially shifting or dislodging within the screw receiving cavity, and to ensure its coaxiality with the first mounting hole 21 and the second mounting hole 11, as well as the reliability of the subsequent connection with the bit 430, a limiting structure needs to be provided within the screw receiving cavity or at the connection point between the screw receiving cavity and the bit receiving cavity. This limiting structure is used to axially limit and circumferentially pre-position the head of the fastening screw 40, ensuring the stability of the assembly process. Specific implementation methods include the following feasible solutions. In one feasible solution, the limiting structure is a protruding structure provided on the sidewall of the screw receiving cavity, such as an annular flange, multiple protruding blocks spaced circumferentially, or a convex strip extending axially. The inner diameter of the protruding structure is slightly smaller than the outer diameter of the head of the fastening screw 40, and the limiting is achieved through the axial abutment of the protruding structure with the head of the fastening screw 40. In another feasible solution, such as... Figure 6 As shown, a limiting sleeve 441 is coaxially sleeved inside the bit receiving cavity. The end face of the limiting sleeve 441 near the screw receiving cavity forms a limiting surface, which is opposite to the head end face of the fastening screw 40. The axial limiting of the fastening screw 40 is achieved through the contact between the limiting surface and the head end face. Furthermore, the inner diameter of the limiting sleeve 441 is adapted to the outer diameter of the bit 430, without affecting the axial movement of the bit 430 along the bit receiving cavity or its connection with the head of the fastening screw 40. Of course, there are many other ways to implement the limiting structure, which will not be listed here. This application does not impose a unique limitation on the specific form of the limiting structure or the detailed structure of the screw receiving cavity, as long as the axial limiting and pre-positioning functions of the fastening screw 40 can be achieved.

[0060] In practical implementation, the bit 430 is used to form a transmission connection with the head of the fastening screw 40 to achieve stable torque transmission. The specific connection method includes several feasible forms. In one feasible form, a magnetic connection is used, with a permanent magnet built into the end of the bit 430. The magnetic force generated by the permanent magnet forms a detachable magnetic attraction and fixation with the head of the fastening screw 40, which facilitates pre-positioning of the fastening screw 40 during assembly and ensures connection stability during torque transmission. In another feasible form, a slot connection is used, with a protrusion structure at the end of the bit 430 that matches the shape and size of the groove in the head of the fastening screw 40. The protrusion and groove interlock to form a circumferential limit, ensuring that the torque of the bit 430 can be accurately and efficiently transmitted to the fastening screw 40, achieving reliable tightening or disassembly operations. These are two common feasible methods; other connection methods are also possible, and this application does not impose specific limitations on them.

[0061] In practical implementation, the telescopic column 330 must meet the dynamic positioning requirements of the housing positioning seat 320, and its movement must coordinate with the pressing mechanism 200 to ensure the coaxiality of the housing 20 and the stator 10 during pressing. The following are two feasible methods:

[0062] The first feasible method is an electric, pneumatic, or hydraulic telescopic rod. For example, the telescopic column 330 uses an electric telescopic rod, which is linked to the press-fitting drive component 210 via a controller. At the beginning of press-fitting, the electric telescopic rod extends, driving the housing positioning seat 320 to a preset position, completing the positioning of the housing 20; during press-fitting, it retracts synchronously according to the program or sensor feedback, causing the housing positioning seat 320 to move downwards with the press-fitting process; after press-fitting is completed, it extends and returns to its original position. Its advantages include strong controllability of stroke and speed, and adaptability to different product specifications.

[0063] The second feasible method: The telescopic column 330 includes a support column 331 and a return spring 332. The support column 331 is vertically fixed to the working platform 620, and its axis is parallel to the axis of the positioning column 310. A guide hole is opened on the housing positioning seat 320 corresponding to the position of the support column 331. The support column 331 passes through the guide hole, allowing the housing positioning seat 320 to slide along the axial direction of the support column 331. A return spring 332 is sleeved on the outside of the support column 331. The two ends of the return spring 332 abut against the upper surface of the working platform 620 and the lower surface of the housing positioning seat 320, respectively. In the initial state, it is in a naturally extended or slightly compressed state, providing upward support force for the housing positioning seat 320. During the press-fitting operation, the housing 20 is placed on the housing positioning seat 320. The press-fitting drive component 210 applies downward force to the closed end of the housing 20. The housing 20 drives the housing positioning seat 320 to slide downward along the support column 331, overcoming the elastic force of the return spring 332. During this process, the housing positioning seat 320 remains in contact with the open end of the housing 20 to ensure positioning accuracy. After the stator 10 is fully press-fitted, the press-fitting drive component 210 releases pressure, the return spring 332 releases its elastic potential energy, and pushes the housing positioning seat 320 upward along the support column 331, automatically returning to the initial positioning position. The advantage of this structure is that it does not require an additional power source, relies on a mechanical spring to achieve reset, has a simple structure, high reliability, and low maintenance cost.

[0064] The tooling device provided in this embodiment operates as follows:

[0065] Initial preparation stage: The operator inserts the fastening screw 40 into the screw receiving cavity of the screw positioning sleeve 440, with the head of the fastening screw 40 facing the bit receiving cavity. The operator then inserts the stator 10 into the stator fixing seat 300; the positioning pin 310 positions and limits the stator 10, ensuring the position of the second mounting hole 11 of the stator 10 is fixed. The operator then fastens the housing 20 onto the outside of the stator 10, so that the open end of the housing 20 abuts against the housing positioning seat 320. The housing positioning seat 320 positions and limits the housing 20, placing it in the waiting position. The operator ensures that the housing 20 and stator 10 are coaxial and their relative positions are determined, and that the first mounting hole 21 at the closed end of the housing 20 is coaxial with the second mounting hole 11 of the stator 10. Simultaneously, the screw positioning sleeve 440 remains coaxial with the first mounting hole 21, meaning the first mounting hole 21, the second mounting hole 11, and the screw positioning sleeve 440 are all coaxial.

[0066] Stator 10 and housing 20 pressing stage: Pressing drive 210 is started and applies axial pressure to the closed end of housing 20. Under the action of pressure, housing positioning seat 320 retracts axially towards the side closer to work platform 620 through telescopic column 330. Stator 10 is fixed under the limiting action of positioning column 310, and housing 20 gradually moves towards stator 10 along the open end until stator 10 is completely pressed into housing 20, completing the initial assembly of stator 10 and housing 20. At this time, housing 20 is in the target position.

[0067] During the assembly stage of the fastening screw 40: The axial drive component 410 is activated, and its drive motor 420 drives the bit 430 to move along the extension direction (i.e., axial) of the bit receiving cavity inside the screw positioning sleeve 440 towards the side close to the pressing mechanism 200; the bit 430 passes through the bit receiving cavity and gradually approaches the fastening screw 40 along the screw receiving cavity until the bit 430 and the head of the fastening screw 40 are engaged. The axial drive component 410 remains active and continuously outputs axial feed force, so that the bit 430 always presses the fastening screw 40 tightly; then the motor 420 is activated, and the motor 420 drives the bit 430 to rotate. The fastening screw 40 rotates with the bit 430. During the rotation, the fastening screw 40 is screwed axially into the second assembly hole 11 and the first assembly hole 21 until the screw connection is completed, realizing the fixed assembly of the stator 10 and the housing 20.

[0068] Reset and part removal stage: After the screw connection is tightened, the motor 420 stops rotating, and the axial drive component 410 drives the motor 420 and the bit 430 to return to the initial position along the bit receiving cavity; the press-fit drive component 210 releases the pressure on the closed end of the housing 20, and the housing positioning seat 320 returns to the initial position under the reset action of the telescopic column 330; finally, the assembled stator 10 and housing 20 are removed from the positioning column 310, and the next assembly cycle can begin.

[0069] In this embodiment, the press-fitting drive component 210 of the press-fitting mechanism 200 can apply pressure to the closed end of the housing 20, pushing the housing 20 and the stator 10 to complete coaxial assembly without manual assistance. The positioning pin 310 and the housing positioning seat 320 can respectively limit and position the stator 10 and the housing 20, ensuring that the first assembly hole 21, the second assembly hole 11 and the screw positioning sleeve 440 are in a coaxial state. After the initial assembly of the housing 20 and stator 10, the axial drive component 410 drives the motor 420 and the bit 430 to move along the bit receiving cavity of the screw positioning sleeve 440. Since the head of the fastening screw 40 is pre-positioned in the screw receiving cavity inside the screw positioning sleeve 440, the bit 430 can accurately engage with the head of the fastening screw 40. Subsequently, the motor 420 can drive the bit 430 to rotate the fastening screw 40, while the axial drive component 410 can provide axial feed force, thus completing the screw fastening of the fastening screw 40 to the first mounting hole 21 and the second mounting hole 11. This device integrates the press-fitting and screw fastening processes into a continuous automated process, with automated connection, eliminating the steps of manual transfer, positioning, and fastening, significantly shortening the assembly cycle and improving overall work efficiency. In addition, this device can ensure that the fastening screw 40 is always accurately guided axially during the screwing process, avoiding problems such as screw misalignment and thread damage that may occur during manual operation. In addition, automated operation mode can eliminate individual differences in manual operation, so that the pressing accuracy, screw tightening torque and depth of each product are highly consistent, which significantly improves the stability and pass rate of product quality.

[0070] Furthermore, in this embodiment, the positioning pin 310 of the stator fixing seat 300 passes through the stator 10 and is fixedly connected to the working platform 620, providing a stable positioning reference for the press-fitting process and preventing the stator 10 from shifting during press-fitting; the housing positioning seat 320 is connected to the working platform 620 through the telescopic pin 330, and the housing positioning seat 320 can tightly abut against the open end of the housing 20 and limit the displacement of the housing 20. At the same time, the screw positioning sleeve 440 installed on the working platform 620 is coaxial with the first assembly hole 21 of the housing 20 and the second assembly hole 11 of the stator 10, further calibrating the assembly reference of the fastening screw 40 of the stator 10 and the housing 20. The multiple positioning coordinates with each other to ensure that the housing 20 and the stator 10 do not shift during the entire press-fitting process, significantly improving the assembly accuracy of the housing 20 and the stator 10.

[0071] In some embodiments, the housing positioning seat 320 has a housing limiting seat 321 embedded on the side opposite to the working platform 620. The housing limiting seat 321 has a passage hole 3211 that is coaxial with and communicates with the mounting hole 322. The positioning post 310 passes through the passage hole 3211. The open end of the housing 20 has a protruding structure, and the housing limiting seat 321 has a housing positioning groove that mates with the protruding structure. The housing limiting seat 321 is detachably embedded in the housing positioning seat 320. For different models of housing 20, the corresponding housing limiting seat 321 can be replaced, improving the versatility and applicability of the device.

[0072] See Figures 1 to 3 , Figures 6 to 9 In some embodiments, the stator 10 is provided with a tension spring, and the housing 20 has a first through hole 22 for tension spring installation operation;

[0073] The tooling device also includes a brush grip spring mechanism 500, which includes at least one spring assembly. The spring assembly includes a sliding shaft 510, a shaft drive 520, a brush grip 530, and a spring drive 540. The cylindrical wall of the positioning post 310 is provided with a radially extending sliding slot 511. The sliding shaft 510 is disposed within the sliding slot 511 and slidably connected to the positioning post 310. The shaft drive 520 is used to drive the sliding shaft 510 to slide outward from the positioning post 310 and extend its first end. The first end is used to pre-fit the tension spring of the stator 10; the brush holder 530 is movably sleeved with the output end of the spring drive 540, the brush holder 530 and the first through hole 22 are interference fit, the output end of the spring drive 540 is provided with a flange 541, the flange 541 abuts against the end face of the brush holder 530 away from the positioning post 310 along the axial direction, the spring drive 540 is used to drive the brush holder 530 to reciprocate between the inner and outer sides of the housing 20 through the first through hole 22, and when moving towards the inner side of the housing 20, the flange 541 drives the brush holder 530 to move synchronously.

[0074] In the initial preparation stage of the tooling device provided in this embodiment, the shaft drive 520 is started, and the shaft drive 520 drives the sliding shaft 510 to slide outward of the positioning post 310 to extend the first end of the sliding shaft 510. The operation pre-fits the tension spring of the stator 10 onto the first end of the sliding shaft 510. During the stator 10 press-fitting stage, when the housing 20 reaches the target station, the spring drive 540 is activated, driving the brush holder 530 to move from the outside to the inside through the first through hole 22 of the housing 20. During the movement, the brush holder 530 gradually approaches the sliding shaft 510. When the end of the brush holder 530 pushes against the sliding shaft 510, the sliding shaft 510 will retract along the sliding groove 511 towards the inside of the positioning post 310 after being subjected to force. The tension spring will disengage from the first end of the sliding shaft 510 and, under its own tension, be fitted onto the outer circumference of the brush holder 530. Finally, the spring drive 540 is reset, and the output end of the spring drive 540 moves from the inside to the outside of the housing 20. The brush holder 530 remains inside the housing 20 due to the interference fit with the first through hole 22, completing the assembly of the tension spring.

[0075] It should be noted that the assembly process of the tension spring and the fastening screw 40 must be carried out after the press-fitting process of the housing 20 and the stator 10 is completed; however, there is no mandatory limit to the assembly sequence of the tension spring and the fastening screw 40, which can be flexibly adjusted according to the actual assembly requirements.

[0076] See Figure 9 In some embodiments, the positioning post 310 has an axially extending air passage 521 inside, which communicates with the sliding slot 511. The shaft drive 520 is an air compressor, and the air outlet of the air compressor is connected to the air passage 521. The shaft drive 520 (air compressor) delivers compressed air to the sliding slot 511 through the air passage 521, pushing the sliding shaft 510 to slide outward, thereby extending the first end of the sliding shaft 510. Pneumatic drive is used, resulting in rapid and stable operation, a simple structure, easy maintenance, and accurate control of the extension and retraction of the sliding shaft 510.

[0077] See Figure 8 In some embodiments, the outer peripheral surface of the sliding shaft 510 is provided with a strip groove parallel to the axial direction, and a fixed shaft 512 is provided in the strip groove. The fixed shaft 512 is fixedly connected to the positioning post 310 to restrict the movement of the sliding shaft 510. In addition, the strip groove has a guiding effect on the fixed shaft 512, which can ensure that the sliding shaft 510 moves along the axial direction. When the shaft drive member 520 drives the sliding shaft 510 to move, it prevents the sliding shaft 510 from dislodging from or rotating in the sliding groove hole 511.

[0078] See Figure 8In some embodiments, the output end of the spring drive 540 is further provided with a groove 531 for accommodating the tension spring. The groove 531 can accommodate the tension spring when the spring drive 540 moves, preventing the tension spring from falling off or shifting during the movement, and ensuring that the tension spring is accurately fitted onto the brush holder 530.

[0079] See Figures 1 to 6 In some embodiments, the tooling device further includes an electrical control assembly, which includes a controller and a sensor group. The sensor group includes a first sensor, a second sensor, a third sensor, a fourth sensor, a fifth sensor, a sixth sensor, and a seventh sensor. The first sensor is used to detect whether the fastening screw 40 has been placed in the screw receiving cavity of the screw positioning sleeve 440; the second sensor is used to detect whether the stator 10 has completed its pre-positioning and is in a preset position ready for pressing; the third sensor is used to detect whether the housing 20 has completed its pre-positioning and is in a preset position ready for pressing; and the fourth sensor is used to detect whether the housing 20 has completed its pressing fit with the stator 10. The controller is connected to the first, second, third, fourth, fifth, sixth, and seventh sensors, the shaft drive 520, the spring drive 540, and the press-fit drive 210. The fifth sensor is used to detect whether the brush holder 530 has completed the spring sleeve action and reached the preset assembly position. The sixth sensor is used to detect whether the fastening screw 40 has completed the pre-positioning and is in the preset position to be screwed into the assembly hole of the stator 10 and the housing 20. The seventh sensor is used to detect whether the fastening screw 40 has been fully screwed into the assembly hole of the stator 10 and the housing 20 and has reached the preset fastening state. The controller is connected to the first, second, third, fourth, fifth, sixth, and seventh sensors, the shaft drive 520, the spring drive 540, and the press-fit drive 210.

[0080] In this embodiment, seven sensors cover key nodes throughout the assembly process. The controller uniformly receives sensor signals, determines the operating conditions, and then drives the actuators, forming a closed loop of "confirming conditions before initiating actions," completely avoiding assembly failures caused by "failure of preceding processes." The specific working process is as follows:

[0081] 1) Confirmation of fastening screw 40 placement: The first sensor detects whether the fastening screw 40 is in the screw receiving cavity of the screw positioning sleeve 440. Only when the first sensor sends a "fastening screw 40 present" signal to the controller will the controller allow the brush gripping spring mechanism 500 to start. If the fastening screw 40 is not placed in the screw receiving cavity, the controller will directly pause subsequent actions to avoid the problem of missing screws.

[0082] 2) Stator 10 positioning confirmation: The second sensor detects whether the stator 10 is stably fitted into the "positioning position" of the positioning post 310 (i.e., the stator 10 has completed pre-positioning and is ready for pressing). The controller will only send a command to the shaft drive 520 (such as the shaft drive 520 driving the sliding shaft 510 to extend) after receiving the "stator 10 in position" signal. If the sliding shaft 510 is started before the stator 10 is in position, it will cause the tension spring to be misaligned. Closed-loop control can completely avoid this problem.

[0083] 3) Housing 20 waiting position confirmation: The third sensor detects whether the housing 20 is placed in the "waiting position" of the housing positioning seat 320 (i.e., the housing 20 has completed the pre-positioning and is ready for pressing). The controller will only allow the pressing mechanism 200 to start after receiving the "housing 20 in position" signal. If the housing 20 is offset, the controller will directly pause the subsequent actions to avoid the coaxiality deviation between the stator 10 and the housing 20 during pressing.

[0084] 4) Confirmation of Housing 20 Press-fit: The fourth sensor detects whether the housing 20 has been accurately pushed to the "target station" by the press-fit mechanism 200 (i.e., the press-fitting of the stator 10 and the housing 20 is in place). Only after confirming that the press-fitting is up to standard will the controller drive the screw fastening mechanism 400's bit 430 to move the fastening screw 40 towards the second assembly hole 11 of the stator 10; at the same time, the controller will drive the brush holder 530 of the brush holder spring mechanism 500 to move towards the inside of the housing 20. If the screw fastening mechanism 400 is activated before the housing 20 is properly pressed-fitted, there will be a gap between the stator 10 and the housing 20, and the fastening screw 40 will not be able to be fully screwed in; if the brush holder 530 is activated before the housing 20 is properly pressed-fitted, the tension spring will not be able to be accurately fitted into the preset position of the housing 20. Closed-loop control can ensure the accuracy of this critical process.

[0085] 5) Brush Holder 530 Station Confirmation: The fifth sensor detects whether the brush holder 530 has moved through the first through hole 22 to the "target station" that pushes against the sliding shaft 510 (i.e., the tension spring has disengaged from the sliding shaft 510 and is fitted onto the brush holder 530). Only after the controller confirms this will it drive the spring drive component 540 to move outward from the housing 20. If the brush holder 530 does not reach its position before the spring drive component 540 retracts, it may cause the tension spring to fall off or be missed in assembly. Closed-loop control can ensure the final effect of the tension spring assembly.

[0086] 6) Confirmation of fastening screw 40 being in position: The sixth sensor detects whether the fastening screw 40 is in the "waiting position" where the threaded end abuts against the second assembly hole 11 (i.e., the fastening screw 40 has been positioned and is ready to be screwed in). The controller will only drive the motor 420 to rotate after confirming this. If the motor 420 starts before the fastening screw 40 is in position, the bit 430 will not be able to abut against the head of the fastening screw 40, further leading to the problem of missing screws.

[0087] 7) Fastening Screw 40 Position Confirmation: The seventh sensor detects whether the fastening screw 40 is in the "target position" where it is fully screwed into the second mounting hole 11 and the first mounting hole 21 (i.e., the stator 10 and the housing 20 are fixedly connected by the fastening screw 40). Only after the controller confirms this will it stop the motor 420 from rotating and drive the axial drive component 410 to move the bit 430 outward from the housing 20. If the fastening screw 40 is not in place, the motor 420 will stop rotating and the axial drive component 410 will retract, resulting in insufficient preload of the fastening screw 40. This will cause the stator 10 to loosen inside the housing 20, disrupting the mechanical balance of the motor. Loosening the fastening screw 40 will directly damage the stator windings, further leading to motor damage.

[0088] Furthermore, in this embodiment, the actions of the pressing mechanism 200, the screw fastening mechanism 400, and the brush gripping spring mechanism 500 are coordinated and synchronized through unified scheduling by the controller, thereby achieving "coordinated linkage" of multiple mechanisms and improving assembly efficiency and consistency. Specifically, the screw tightening and brush holder 530 assembly are synchronized: when the fourth sensor returns a qualified signal, the controller will simultaneously send instructions to the "axial drive 410" and the "spring drive 540": the axial drive 410 drives the bit 430 to move towards the fastening screw 40 and bring the fastening screw 40 to the waiting position, and the spring drive 540 simultaneously drives the brush holder 530 to move towards the inside of the housing 20 through the first through hole 22 - the two actions are performed simultaneously, and the operation is completed at both the closed end and the open end of the housing 20; when the fifth and seventh sensors both return qualified signals, the controller will simultaneously send instructions to the "press drive 210", "axial drive 410", "motor 420" and "spring drive 540": the press drive 210 drives the press contact plate to move away from the housing 20, the axial drive 410 drives the bit 430 to move towards the outside of the housing 20, the motor 420 stops rotating, and the spring drive 540 moves towards the outside of the housing 20, and the press is completed. The entire process requires no human intervention and the actions are seamlessly connected, significantly improving assembly efficiency compared to the manually controlled "wait-judgment-start" process.

[0089] In this embodiment, the timing of all actions and the stroke are executed by the controller according to preset logic. Through automatic detection by sensors and automatic decision-making by the controller, the manual "confirmation-intervention" process is completely replaced. It is not affected by human operation errors (such as visual judgment deviation and inconsistent operation speed). It can automatically complete the pressing of stator 10 and housing 20, spring assembly, and fastening screw 40 installation, ensuring that the assembly process and key parameters (such as pressing depth and spring assembly position) of each workpiece are completely consistent. No manual supervision is required, which greatly reduces labor costs. At the same time, it is easy to trace the assembly data of each workpiece (such as sensor detection records and action sequence), which greatly improves the product qualification rate.

[0090] In some embodiments, the spring drive 540 is mounted on the work platform 620, and the press drive 210 is mounted on the frame 610. In this way, the frame 610 and the work platform 620 provide robust rigid support for each component. The work platform 620 not only provides a stable operating platform, but also facilitates auxiliary operation, conforms to ergonomic principles, and optimizes the layout of the production site.

[0091] In practice, a protective cover is installed around the work platform 620. This cover serves to reduce noise, isolate external interference, and protect the safety of the staff.

[0092] In practice, a safety light curtain is installed on the frame 610. The safety light curtain is electrically connected to the controller. When the safety light curtain detects a human body or foreign object entering the working area of ​​the equipment, it will immediately send a trigger signal to the controller. After receiving the signal, the controller will pause all actions of the pressing drive 210, shaft drive 520, spring drive 540, axial drive 410 and motor 420 until the safety hazard is eliminated, thus protecting the personal safety of the staff.

[0093] While specific embodiments of this application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of this application. The scope of this application is defined by the appended claims.

Claims

1. A tooling device for press-fitting a stator and a housing, wherein the closed end of the housing is provided with a first assembly hole and the stator is provided with a second assembly hole, both the first assembly hole and the second assembly hole being used for screwing with fastening screws; Its features are, The tooling includes: frame; The working platform is fixedly connected to the frame; A pressing mechanism includes a pressing drive component, which is mounted on the frame and is used to apply force to the closed end of the housing to press the stator into the housing along the open end. A stator fixing seat includes a positioning column and a housing positioning seat. One end of the positioning column is fixedly connected to the working platform, and the other end of the positioning column is used to position and limit the stator. The housing positioning seat is connected to the working platform through a telescopic column. The housing positioning seat has an installation hole, and the positioning column passes through the installation hole. The housing positioning seat is used to abut and position with the open end of the housing, so that the housing and the stator, the first assembly hole and the second assembly hole are coaxially arranged. A screw fastening mechanism includes a screw positioning sleeve and a fastening drive assembly. The screw positioning sleeve is mounted on the working platform and has an axially connected screw receiving cavity and a bit receiving cavity inside. The screw receiving cavity is used to pre-accommodate and position the head of the fastening screw. The screw positioning sleeve passes through the mounting hole and is coaxially arranged with the first assembly hole of the housing mounted on the housing positioning seat. The fastening drive assembly is located on the side of the working platform away from the pressing mechanism. The fastening drive assembly includes an axial drive component, a motor, and a bit. The axial drive component is mounted on the frame and its output end is connected to the motor. The output end of the motor is connected to the bit. The bit is coaxial with the screw positioning sleeve and is used to connect with the head of the fastening screw. After the housing and the stator are assembled, the axial drive member drives the motor to move the bit along the extension direction of the bit receiving cavity towards the side close to the pressing mechanism until the bit is connected to the head of the fastening screw. Then, the motor drives the bit to rotate the fastening screw, so as to realize the screw fastening of the fastening screw with the first mounting hole and the second mounting hole.

2. The tooling device for press-fitting the stator and housing as described in claim 1, characterized in that, The housing has a first through hole; The tooling device also includes a brush holder spring mechanism, which includes at least one spring assembly. The spring assembly includes a sliding shaft, a shaft drive, a brush holder, and a spring drive. The cylindrical wall of the positioning post is provided with a radially extending sliding groove. The sliding shaft is disposed in the sliding groove and slidably connected to the positioning post. The shaft drive is used to drive the sliding shaft to slide outward from the positioning post and extend beyond the first end of the sliding shaft. The first end of the sliding shaft is used to pre-fit the tension spring of the stator. The brush holder is movably sleeved with the output end of the spring drive. The brush holder and the first through hole are interference-fitted. The output end of the spring drive is provided with a flange. The flange abuts against the end face of the brush holder axially away from the housing. The spring drive is used to drive the brush holder to reciprocate between the inside and outside of the housing through the first through hole. When moving towards the inside of the housing, the brush holder moves synchronously through the flange.

3. The tooling device for press-fitting the stator and housing as described in claim 2, characterized in that, The positioning column has an axially extending air passage inside, which is connected to the sliding groove hole. The shaft drive component is an air compressor, and the air outlet of the air compressor is connected to the air passage.

4. The tooling device for press-fitting the stator and housing as described in claim 1, characterized in that, The axial drive component includes a cylinder and a motor platform. The output end of the cylinder is fixedly connected to the motor platform, and the motor is fixedly connected to the motor platform.

5. The tooling device for press-fitting the stator and housing as described in claim 1, characterized in that, The telescopic column includes a support column, which is fixedly connected to the working platform. The housing positioning seat is slidably connected to the support column. The support column is fitted with a spring to enable the housing positioning seat to return to its initial position after moving along a first direction.

6. The tooling device for press-fitting the stator and housing as described in claim 1, characterized in that, The pressing mechanism further includes a pressing contact plate. The output end of the pressing drive is connected to the pressing contact plate. The pressing contact plate is used to abut against the closed end of the housing, and the plate surface area of ​​the pressing contact plate is larger than the end surface area of ​​the closed end of the housing.

7. The tooling device for press-fitting the stator and housing as described in claim 2, characterized in that, It also includes a controller and a sensor group, which includes a first sensor, a second sensor, a third sensor, a fourth sensor, a fifth sensor, a sixth sensor, and a seventh sensor. The first sensor is used to detect whether the fastening screw has been placed in the screw receiving cavity of the screw positioning sleeve; the second sensor is used to detect whether the stator has completed its pre-positioning and is in a preset position ready for pressing; the third sensor is used to detect whether the housing has completed its pre-positioning and is in a preset position ready for pressing; the fourth sensor is used to detect whether the housing has completed pressing and assembly with the stator and reached a preset assembly position; the fifth sensor is used to detect whether the brush holder has completed its tension spring sleeve action and reached a preset assembly position; the sixth sensor is used to detect whether the fastening screw has completed its pre-positioning and is in a preset position ready to be screwed into the stator and the housing; the seventh sensor is used to detect whether the fastening screw has been fully screwed in and reached a preset tightening state. The controller is connected to the sensor group, the pressing drive, the shaft drive, the spring drive, the axial drive, and the motor.

8. The tooling device for press-fitting the stator and housing as described in claim 2, characterized in that, The sliding shaft is provided with a radial groove, and a fixed shaft is provided in the groove. The fixed shaft is fixedly connected to the positioning post to restrict the movement of the sliding shaft.

9. The tooling device for press-fitting the stator and housing as described in claim 1, characterized in that, The housing positioning seat is embedded with a housing limiting seat, and the housing limiting seat is provided with a passage hole coaxial with the mounting hole, and the positioning post passes through the passage hole; The housing opening has a protruding structure, and the housing limiting seat is provided with a housing positioning groove that cooperates with the protruding structure.

10. The tooling device for press-fitting the stator and housing as described in claim 2, characterized in that, The output end of the spring drive is also provided with a groove, which is used to accommodate the tension spring.

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