A motor housing press fitting device

Abstract

This invention discloses a motor housing press-fitting device, belonging to the field of press-fitting equipment technology. It includes a frame, within which are a housing heating assembly, a housing transfer assembly, a stator positioning assembly, and a press-fitting assembly. Through the coordinated operation of an active press head, a floating press head, a pre-compression spring, a return spring, a positioning post, and a pressure relief buffer assembly, this invention guides hot air into the pressure relief chamber when the positioning post guides the air within the central hole of the motor housing. The reverse support force of the hot air in the pressure relief chamber, combined with the return spring, buffers the initial downward pressure of the floating press head, effectively reducing the initial impact of press-fitting, lowering the risk of misalignment, and improving the stability and assembly consistency of the hot press-fitting of the motor housing and stator. While solving the problem of hot air compression affecting the press-fitting effect, it also uses hot air to control the press-fitting progress, thereby improving the final press-fitting quality of the motor housing.

Description

Technical Field

[0001] This invention relates to the field of press-fitting equipment technology, and in particular to a press-fitting equipment for motor housings. Background Technology

[0002] During motor assembly, the motor housing and stator are typically assembled using an interference fit. To reduce pressing resistance and avoid deformation of the motor housing opening, scratches on the stator surface, or uneven pressing caused by direct pressing at room temperature, current production processes often involve heating the mating area of ​​the motor housing to allow it to expand before pressing it into place with the stator.

[0003] Most existing hot pressing methods have the following shortcomings: when the motor housing is transferred to the pressing station by the transfer mechanism after heating, the posture control of the hot part is unstable and it is easy to wobble. Moreover, in the initial stage of pressing, the hot air inside the hot motor housing is squeezed in the center hole and mating area, which can easily form instantaneous stagnation, resulting in increased initial impact of pressing. This can easily cause problems such as one-sided entry, oblique jamming, or uneven local force when the motor housing and stator are initially mated, thus affecting the assembly accuracy and product consistency.

[0004] Therefore, it is necessary to provide a motor housing press-fitting device that can improve the stability and press-fitting quality of the hot press-fitting process. Summary of the Invention

[0005] The purpose of this invention is to provide a motor housing press-fitting device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a motor housing pressing device, comprising a frame, wherein the frame is provided with a housing heating assembly, a housing transfer assembly, a stator positioning assembly, and a pressing assembly; The housing heating assembly includes a base fixed inside the frame, a cylindrical heating head that can be inserted into the inner hole of the motor housing, and a feeding positioning rod for initial positioning of the motor housing. Both the cylindrical heating head and the feeding positioning rod are fixedly installed on the upper surface of the base. The housing transfer assembly includes a vacuum adsorption head disposed inside the frame, which is used to transfer the motor housing to be heated to the housing heating assembly; The pressing assembly includes a pressing cylinder disposed inside the frame, a pressing head mounting seat disposed at the bottom of the pressing cylinder, an active pressing head guided and connected to the pressing head mounting seat, an electromagnet disposed on the lower surface of the active pressing head, and a floating pressing head disposed below the active pressing head. A guide rod is fixedly mounted on the upper surface of the floating pressing head, and a guide hole cooperating with the guide rod is provided through the lower surface of the active pressing head. A transmission plate is fixedly mounted on the top end of the guide rod, and the transmission plate is located between the pressing head mounting seat and the active pressing head. A return spring is provided between the lower surface of the transmission plate and the upper surface of the active pressing head, and a preload spring is provided between the upper surface of the floating pressing head and the lower surface of the active pressing head. The stator positioning assembly includes a turntable rotatably mounted inside the frame and multiple stator mounting seats mounted on the upper surface of the turntable.

[0007] Preferably, the active pressure head is fixedly provided with a positioning post for insertion into the center hole of the motor housing, and a limiting block for limiting the pre-pressing position of the floating pressure head is fixedly provided at the end of the positioning post located above the active pressure head.

[0008] Preferably, a pressure relief buffer assembly is provided below the transmission plate. The pressure relief buffer assembly includes a pressure relief sleeve fixedly disposed below the transmission plate, a movable sleeve fixedly disposed on the upper surface of the active pressure head with its top end inserted into the bottom end of the pressure relief sleeve, and a pressure relief air guide hole that passes through the middle of the positioning column and communicates with the movable sleeve. After the positioning column is inserted into the center hole of the motor housing during the pressing process, the hot air inside the motor housing is guided through the pressure relief air guide hole to the pressure relief chamber formed by the pressure relief sleeve and the movable sleeve. After the hot air acts on the pressure relief chamber, it forms a reverse support force on the transmission plate and the floating pressure head, thereby buffering the initial pressing of the motor housing.

[0009] Preferably, a pressure relief valve is provided through the middle of the outer side of the pressure relief sleeve, and the pressure relief valve is used to discharge the hot gas accumulated in the pressure relief chamber.

[0010] Preferably, the downward preload force of the preload spring on the floating pressure head is greater than the upward preload force of the return spring on the transmission plate, so that the floating pressure head maintains a preloaded position with its head extending downward relative to the active pressure head in the initial state. After the positioning pin is inserted into the center hole of the motor housing and hot air enters the pressure relief chamber, the sum of the upward force of the return spring on the transmission plate and the upward supporting force of the pressure relief chamber on the transmission plate is less than the downward force of the preload spring on the floating pressure head, so that the floating pressure head is still in a slow downward pressure state when subjected to the action of the return spring and the pressure relief chamber.

[0011] Preferably, the housing heating assembly further includes two centering clamps located on both sides of the cylindrical heating head, and the two centering clamps are respectively connected to the output end of the corresponding clamping cylinder, which is fixedly installed inside the frame.

[0012] Preferably, the housing transfer assembly further includes a horizontal slide rail fixed inside the frame, a horizontal slide block slidably mounted on the outer side of the horizontal slide rail, and a vertical slide block slidably mounted on the outer surface of the horizontal slide block, wherein the vacuum suction head is fixedly mounted on the outer surface of the vertical slide block.

[0013] Preferably, the pressing assembly further includes a transfer slide rail fixedly installed inside the frame and a transfer slide table slidably installed on the outer surface of the transfer slide rail. The pressing cylinder is fixedly installed on the outer surface of the transfer slide table. The pressing assembly can move between the heating station and the pressing station to drive the motor housing attracted by the electromagnet to transfer.

[0014] Preferably, the top of the material feeding positioning rod is provided with an upward-convex guide slope that is adapted to the center hole of the motor housing, so that the motor housing slides along the guide slope during the lowering process and completes precise positioning.

[0015] Preferably, the upper surface of the stator placement seat is provided with a placement recess that matches the outer circle of the stator, and a central limiting block is provided in the middle of the placement recess to radially position the stator.

[0016] The technical effects and advantages of this invention are as follows: 1. This invention utilizes the coordinated operation of an active pressure head, a floating pressure head, a pre-compression spring, a return spring, a positioning post, and a pressure relief buffer assembly. This allows the positioning post to guide hot air into the pressure relief chamber as it guides the motor housing through the central hole. The reverse support force of the hot air in the pressure relief chamber, combined with the return spring, buffers the initial pressing process of the floating pressure head. This effectively reduces the initial impact of pressing, lowers the risk of oblique jamming, and improves the stability and assembly consistency of the hot pressing of the motor housing and stator. While solving the problem of hot air extrusion affecting the pressing effect, this invention also uses hot air to control the pressing progress, thereby improving the final pressing quality of the motor housing. This invention improves the stability and heating uniformity of the motor housing during the heating stage by setting a material positioning rod and a cylindrical heating head on the base, so that the motor housing can be initially positioned before entering the heating station for thermal expansion treatment. The centering clamp plate clamps and limits the motor housing, thereby reducing the positional deviation in the subsequent hot pressing process. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a schematic diagram of the internal structure of the frame of the present invention.

[0019] Figure 3 This is a schematic diagram of the housing heating assembly structure of the present invention.

[0020] Figure 4This is a schematic diagram of the press-fit assembly structure of the present invention. Figure 1 .

[0021] Figure 5 This is a schematic diagram of the press-fit assembly structure of the present invention. Figure 2 .

[0022] Figure 6 This is a schematic diagram of the press-fit assembly structure of the present invention. Figure 3 .

[0023] Figure 7 This is a schematic diagram of the floating pressure head structure of the present invention.

[0024] Figure 8 This is a schematic diagram of the active pressure head structure of the present invention.

[0025] Figure 9 This is a schematic diagram of the stator positioning component structure of the present invention.

[0026] In the diagram: 1. Frame; 2. Base; 22. Cylindrical heating head; 21. Feeding positioning rod; 221. Centering clamp; 222. Clamping cylinder; 3. Horizontal slide rail; 31. Horizontal slide block; 32. Vertical slide block; 33. Vacuum suction head; 4. Pressing cylinder; 401. Transfer slide rail; 402. Transfer slide table; 41. Press head mounting seat; 42. Active press head; 43. Electromagnet; 44. Positioning column; 441. Limit block; 45. Floating press head; 451. Guide rod; 452. Preload spring; 454. Return spring; 46. Transmission plate; 462. Pressure relief sleeve; 463. Pressure relief valve; 464. Movable sleeve; 465. Pressure relief vent; 5. Turntable; 51. Stator placement seat. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] like Figures 1 to 9 As shown, the motor housing pressing equipment provided by the present invention is essentially a motor housing pressing equipment that can realize the integrated pressing of motor housing positioning, heating, transfer and buffering.

[0029] In terms of specific structural installation, the structural body can be constructed according to the inventive concept of this embodiment. In this embodiment, no special limitations are imposed.

[0030] In this embodiment, a motor housing pressing device includes a frame 1. The frame 1 is formed by welding steel plates, square tubes or shaped steel to form an integral frame structure. The interior of the frame forms an installation space for installing a housing heating assembly, a housing transfer assembly, a stator positioning assembly and a pressing assembly. The frame 1 can provide a stable installation foundation for each component and ensure the relative positional accuracy of the heating, transfer and pressing processes.

[0031] The housing heating assembly is located on one side inside the frame 1, including a base 2, a cylindrical heating head 22, and a feeding positioning rod 21. The base 2 is preferably made of metal sheet or a machined base and is fixedly installed inside the frame 1. The cylindrical heating head 22 is vertically arranged on the upper surface of the base 2. Its shape is a hollow or solid cylindrical structure. It adopts a heating head form that can adapt to the inner hole size of the motor housing. It is used to insert into the inner hole of the motor housing and heat the mating area of ​​the motor housing, causing the motor housing to expand due to heat. The feeding positioning rod 21 is arranged on the upper surface of the base 2. Its function is to initially place and position the motor housing to be processed. The top of the feeding positioning rod 21 is provided with an upward-converging guide slope. The bottom contour of the guide slope is adapted to the center hole of the motor housing. When the operator or the feeding mechanism places the motor housing on the feeding positioning rod 21, the motor housing can automatically center along the guide slope, thereby completing the initial positioning and providing an accurate initial state for subsequent transfer and heating.

[0032] To further improve the stability of the motor housing at the heating station, the housing heating assembly also includes two centering clamps 221 located on both sides of the cylindrical heating head 22. The two centering clamps 221 are connected to the output ends of the corresponding clamping cylinders 222. The clamping cylinders 222 are fixed inside the frame 1. When the motor housing moves to the corresponding position of the cylindrical heating head 22, the two clamping cylinders 222 are activated, causing the two centering clamps 221 to move inward and center and clamp the outer periphery of the motor housing, so that it maintains a stable position during the heating process and avoids tilting or shaking.

[0033] The housing transfer assembly is used to grasp and transfer the heated motor housing. It includes a horizontal slide rail 3, a horizontal slide block 31, a vertical slide block 32, and a vacuum suction head 33. The horizontal slide rail 3 is fixedly installed inside the frame 1. The horizontal slide block 31 is slidably mounted on the horizontal slide rail 3 for horizontal movement. The vertical slide block 32 is slidably mounted on the outer surface of the horizontal slide block 31 for vertical movement. The vacuum suction head 33 is fixedly mounted on the outer surface of the vertical slide block 32. Driven by the vertical slide block 32, the vacuum suction head 33 moves downwards and suctions the top of the heated motor housing, subsequently transferring it through water... The coordinated action of the smooth seat 31 and the vertical slide 32 transfers the motor housing to be heated to the housing heating assembly. Since the vacuum adsorption head 33 adsorbs the top of the motor housing, the posture stability of the hot motor housing can be well maintained during the transfer process. It should be noted that the vacuum adsorption head 33 is only responsible for feeding at room temperature or assisting in the front-end transfer. After heating, the motor housing is transferred to the work station by the electromagnet 43 in the pressing assembly in conjunction with the transfer slide 402. It should be noted that linear lead screw groups and motors are provided between the horizontal slide rail 3, the horizontal slide 31, and the vertical slide 32 as power sources.

[0034] The stator positioning assembly is used to support and position the stator to be assembled. It includes a turntable 5 rotatably mounted inside the frame 1 and multiple stator placement seats 51 mounted on the upper surface of the turntable 5. The turntable 5 can be driven by an external drive mechanism to achieve intermittent rotation or indexing rotation, so that the multiple stator placement seats 51 can be sequentially moved to the loading station, pressing station and unloading station. The upper surface of the stator placement seat 51 is provided with a placement recess that matches the outer circle of the stator. A center limiting block is provided in the middle of the placement recess. The placement recess can support the outer circle of the stator, and the center limiting block can limit the center position of the stator, so that the stator can maintain a relatively accurate radial positioning at the pressing station, providing a basis for the coaxial fit between the motor housing and the stator.

[0035] The pressing assembly is located inside the frame 1 and is used to complete the removal, transfer, pre-pressing, and final pressing of the hot motor housing. The pressing assembly includes a pressing cylinder 4, a pressing head mounting seat 41, an active pressing head 42, an electromagnet 43, a positioning column 44, a floating pressing head 45, a guide rod 451, a pre-pressing spring 452, a return spring 454, a transmission plate 46, a transfer slide rail 401, and a transfer slide table 402. The transfer slide rail 401 is fixed inside the frame 1, the transfer slide table 402 is slidably mounted on the transfer slide rail 401, and the pressing cylinder 4 is fixedly mounted on the upper surface of the transfer slide table 402. With the help of the transfer slide rail 401 and the transfer slide table 402, the pressing assembly can move between the heating station and the pressing station. A linear screw assembly and a motor are provided between the transfer slide rail 401 and the transfer slide table 402 as a power source. The pressure head mounting base 41 is fixed to the bottom end of the pressing cylinder 4. The active pressure head 42 is guided and connected to the pressure head mounting base 41 and can move up and down under the drive of the pressing cylinder 4. An electromagnet 43 is provided on the lower surface of the active pressure head 42 for adsorbing the hot motor housing at the heating station. A positioning post 44 is fixed in the middle of the active pressure head 42. The positioning post 44 is used to insert into the center hole of the motor housing during the formal pressing stage for center guidance. A limit block 441 is provided at the upper end of the positioning post 44 for limiting the pre-pressing position of the floating pressure head 45 relative to the active pressure head 42. A floating pressure head 45 is positioned below the active pressure head 42. A guide rod 451 is fixedly mounted on the upper surface of the floating pressure head 45. The guide rod 451 passes through a guide hole on the lower surface of the active pressure head 42 and extends upward. A transmission plate 46 is fixedly mounted at its top end. The transmission plate 46 is located between the pressure head mounting base 41 and the active pressure head 42. A return spring 454 is provided between the lower surface of the transmission plate 46 and the upper surface of the active pressure head 42. A preload spring 452 is provided between the upper surface of the floating pressure head 45 and the lower surface of the active pressure head 42. It should be noted that, in the initial state, the downward preload force of the preload spring 452 is greater than that of the return spring. The upward preload of the spring 454 keeps the floating pressure head 45 in a downward-extending state relative to the active pressure head 42. When the pressing assembly moves to the heating station and begins to remove the shell, the pressing cylinder 4 first drives the active pressure head 42 and the floating pressure head 45 to move downward together. The floating pressure head 45 first comes into contact with the upper surface of the motor housing. Then, the electromagnet 43 on the lower surface of the active pressure head 42 is energized to attract the motor housing. At this time, the active pressure head 42 and the floating pressure head 45 are in a compressed fit. Subsequently, the transfer slide 402 drives the pressing assembly together with the attracted motor housing to move to the upper part of the pressing station for pressing operation.

[0036] A pressure relief buffer assembly is provided below the transmission plate 46. The pressure relief buffer assembly includes a pressure relief sleeve 462, a movable sleeve 464, and a pressure relief vent 465. The pressure relief sleeve 462 is fixedly located below the transmission plate 46, and the movable sleeve 464 is fixedly located on the upper surface of the active pressure head 42. The top end of the movable sleeve 464 is inserted into the bottom end of the pressure relief sleeve 462, thereby forming a pressure relief chamber between the two. The pressure relief vent 465 is provided through the middle of the positioning column 44 and is connected to the movable sleeve 464. A pressure relief valve 463 is provided through the middle of the outer side of the pressure relief sleeve 462 for venting after hot gas accumulates in the pressure relief chamber. After the positioning pin 44 is inserted into the center hole of the motor housing during the press-fitting process, the hot air inside the motor housing enters the pressure relief chamber formed by the movable sleeve 464 and the pressure relief sleeve 462 through the pressure relief vent 465. The hot air entering the pressure relief chamber exerts an upward supporting force on the transmission plate 46, which, together with the upward force of the return spring 454, buffers the continued downward pressure of the floating pressure head 45. During this process, since the sum of the upward force of the return spring 454 and the upward supporting force of the hot air in the pressure relief chamber is less than the downward force of the preload spring 452 on the floating pressure head 45, the floating pressure head 45 will not be lifted, but will remain in a slow downward state under the buffering effect, thereby reducing the impact and deviation risk during the initial press-fitting of the hot motor housing. As the press-fitting continues, the active pressure head 42... Continuing downwards, the electromagnet 43 at the bottom of the active pressure head 42 contacts the top of the motor housing, and the active pressure head 42 finally completes the final pressing of the motor housing and stator. During the pressing process, the pressure relief valve 463 can slowly discharge the hot air in the pressure relief chamber to ensure a smooth transition of the buffering effect. It should be noted that since the electromagnet 43 directly bears the transmission of force during the final pressing process, a reinforcing frame is installed at the edge of the electromagnet 43 to distribute the force in order to ensure the structural stability of the electromagnet 43. It should be further noted that in order to ensure that the electromagnet 43 can successfully attract and press the motor housing, the floating pressure head 45 is designed as an annular structure with a diameter slightly smaller than the top of the motor housing. It can pre-press the motor housing without affecting the fit between the electromagnet 43 and the motor housing.

[0037] When using the motor housing pressing equipment of the present invention, the motor housing to be pressed is first transported to the housing heating component area inside the frame 1, and the motor housing is lowered to the material placement positioning rod 21 above the base 2. The top of the material placement positioning rod 21 is provided with an upwardly converging guide slope, and the bottom contour of the guide slope is adapted to the center hole of the motor housing. Therefore, the motor housing can automatically slide along the guide slope and gradually center under its own gravity during the lowering process, thereby completing the initial positioning before heating. Then, the motor housing is moved to the corresponding position of the cylindrical heating head 22, so that the cylindrical heating head 22 is inserted into the inner hole area of ​​the motor housing, and the centering clamping plates 221 located on both sides of the cylindrical heating head 22 move towards each other under the drive of the clamping cylinder 222 to clamp and limit the outer periphery of the motor housing, so as to ensure that the motor housing maintains a stable posture at the heating station. Then, the cylindrical heating head 22 heats the mating area of ​​the motor housing, so that the motor housing is in an expanded state. After the motor housing is heated, the pressing assembly moves as a whole above the heated motor housing with the cooperation of the transfer slide rail 401 and the transfer table 402. The pressing cylinder 4 drives the pressing head mounting seat 41, the active pressing head 42 and the floating pressing head 45 to move downward together. Since the floating pressing head 45 is pre-tightened downward by the pre-compression spring 452 in the initial state and extends downward relative to the active pressing head 42, the floating pressing head 45 is in contact with the upper surface of the motor housing before the active pressing head 42, thus establishing a stable pressing contact relationship first. After the floating pressing head 45 is in contact with the upper surface of the motor housing, the electromagnet 43 set on the lower surface of the active pressing head 42 is energized to attract the heated motor housing. At this time, the active pressing head 42 and the floating pressing head 45 are in a compressed fit state, and the motor housing is clamped between the electromagnet 43 and the floating pressing head 45. Then the transfer table 402 moves along the transfer slide rail 401, driving the entire pressing assembly along with the attracted motor housing from the heating station to above the pressing station. At the same time, the stator to be assembled is placed in the stator placement seat 51 on the turntable 5. The placement recess on the upper surface of the stator placement seat 51 supports the outer circle of the stator. The central limiting block in the middle of the placement recess restricts the position of the stator. After the turntable 5 rotates, the stator is sent to the pressing position so that the hot motor housing and the stator are in an upper and lower corresponding state. After the pressing assembly moves into place, it continues to move downward, so that the lower end of the motor housing is partially sleeved on the stator. At this time, the power supply of the electromagnet 43 is cut off. After the motor housing loses the magnetic attraction at the top, it completes a pre-pressing under the combined action of its own gravity and the downward force of the floating pressure head 45, thereby establishing a relatively gentle initial assembly relationship between the motor housing and the stator. Subsequently, the press cylinder 4 continues to drive the active press head 42 to move downward. The active press head 42 first drives the floating press head 45 to move downward again through the pre-compression spring 452, and performs secondary pre-compression on the motor housing to further eliminate the assembly gap between the motor housing and the stator and correct local attitude deviations until the positioning pin 44 set in the middle of the active press head 42 is inserted into the center hole of the motor housing. During this process, the positioning pin 44 forms an axial guide for the motor housing and restricts its lateral displacement. As the active pressure head 42 presses down further, the positioning pin 44 inserts into the center hole of the motor housing. At this time, the hot air inside the motor housing, which was squeezed upward during the hot pressing process, enters the pressure relief chamber formed by the pressure relief sleeve 462 and the movable sleeve 464 through the pressure relief vent 465. The hot air accumulated in the pressure relief chamber forms an upward reverse support force on the transmission plate 46. At the same time, the return spring 454 set between the lower surface of the transmission plate 46 and the upper surface of the active pressure head 42 also exerts an upward force on the transmission plate 46. Therefore, the support force of the hot air in the pressure relief chamber and the upward force of the return spring 454 work together on the transmission plate 46. The pressure is fed back to the floating pressure head 45 via the guide rod 451, thus buffering the continued downward pressure of the floating pressure head 45. Since the downward preload of the preload spring 452 on the floating pressure head 45 is greater than the upward preload of the return spring 454 on the transmission plate 46, and the sum of the upward forces formed by the return spring 454 and the pressure relief chamber is still less than the downward force of the preload spring 452, the floating pressure head 45 will not be pushed back, but will remain in a slow downward state under the buffering effect, so that the hot motor housing can be gradually introduced above the stator in a relatively stable manner during the initial pressing stage, reducing the impact and risk of oblique jamming in the initial pressing stage. As the active pressure head 42 continues to descend, the fitting depth between the motor housing and the stator increases continuously. The hot air accumulated in the pressure relief chamber is gradually discharged through the pressure relief valve 463 located in the middle of the outer side of the pressure relief sleeve 462 to prevent the excessive air pressure in the chamber from affecting the subsequent pressing stroke. After the buffer transition is completed, the active pressure head 42 continues to apply pressure downward and finally completes the pressing assembly of the motor housing and the stator through the electromagnet 43. After pressing is completed, pressing cylinder 4 returns, active pressing head 42 rises, and floating pressing head 45 returns to the initial pre-pressing position under the combined action of pre-pressing spring 452, return spring 454, guide rod 451 and guide hole of active pressing head 42, completing a complete hot shell removal, transfer, pre-pressing buffer and final pressing cycle. Turntable 5 then transfers the pressed workpiece to the next station and sends the next stator to be pressed into the pressing position, thus realizing continuous cycle operation of the equipment.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A motor housing pressing device, comprising a frame (1), characterized in that: The frame (1) is equipped with a housing heating assembly, a housing transfer assembly, a stator positioning assembly and a press assembly; The housing heating assembly includes a base (2) fixed inside the frame (1), a cylindrical heating head (22) that can be inserted into the inner hole of the motor housing, and a feeding positioning rod (21) for the initial positioning of the motor housing. The cylindrical heating head (22) and the feeding positioning rod (21) are both fixedly installed on the upper surface of the base (2). The housing transfer assembly includes a vacuum adsorption head (33) disposed inside the frame (1), the vacuum adsorption head (33) being used to transfer the motor housing to be heated to the housing heating assembly; The pressing assembly includes a pressing cylinder (4) disposed inside the frame (1), a pressing head mounting seat (41) disposed at the bottom of the pressing cylinder (4), an active pressing head (42) guided and connected to the pressing head mounting seat (41), an electromagnet (43) disposed on the lower surface of the active pressing head (42), and a floating pressing head (45) disposed below the active pressing head (42). A guide rod (451) is fixedly installed on the upper surface of the floating pressing head (45). A guide hole that cooperates with the guide rod (451) is provided through the lower surface of the active pressing head (42). A transmission plate (46) is fixedly installed at the top of the guide rod (451). The transmission plate (46) is located between the pressing head mounting seat (41) and the active pressing head (42). A reset spring (454) is provided between the lower surface of the transmission plate (46) and the upper surface of the active pressing head (42). A preload spring (452) is provided between the upper surface of the floating pressing head (45) and the lower surface of the active pressing head (42). The stator positioning assembly includes a turntable (5) rotatably mounted inside the frame (1) and a plurality of stator placement seats (51) mounted on the upper surface of the turntable (5).

2. The motor housing press-fitting equipment according to claim 1, characterized in that: The active pressure head (42) is fixedly provided with a positioning post (44) for inserting into the center hole of the motor housing. The end of the positioning post (44) located above the active pressure head (42) is fixedly provided with a limiting block (441) for limiting the pre-pressing position of the floating pressure head (45).

3. The motor housing press-fitting equipment according to claim 2, characterized in that: The transmission plate (46) is provided with a pressure relief buffer assembly below it. The pressure relief buffer assembly includes a pressure relief sleeve (462) fixedly disposed below the transmission plate (46), a movable sleeve (464) fixedly disposed on the upper surface of the active pressure head (42) and inserted into the bottom end of the pressure relief sleeve (462), and a pressure relief air guide hole (465) that passes through the middle of the positioning column (44) and communicates with the movable sleeve (464). After the positioning column (44) is inserted into the center hole of the motor housing during the pressing process, the hot air inside the motor housing is guided through the pressure relief air guide hole (465) to the pressure relief chamber formed by the pressure relief sleeve (462) and the movable sleeve (464). After the hot air acts on the pressure relief chamber, it forms a reverse support force on the transmission plate (46) and the floating pressure head (45), thereby buffering the initial pressing of the motor housing.

4. The motor housing press-fitting equipment according to claim 3, characterized in that: A pressure relief valve (463) is provided through the middle of the outer side of the pressure relief sleeve (462), and the pressure relief valve (463) is used to discharge the hot gas accumulated in the pressure relief chamber.

5. The motor housing press-fitting equipment according to claim 3, characterized in that: The downward preload force of the preload spring (452) on the floating pressure head (45) is greater than the upward preload force of the reset spring (454) on the transmission plate (46), so that the floating pressure head (45) maintains a preloaded position with its head (45) extended downward relative to the active pressure head (42) in the initial state. After the positioning pin (44) is inserted into the center hole of the motor housing and hot air enters the pressure relief chamber, the sum of the upward force of the reset spring (454) on the transmission plate (46) and the upward support force of the pressure relief chamber on the transmission plate (46) is less than the downward force of the preload spring (452) on the floating pressure head (45), so that the floating pressure head (45) is still in a slow downward pressure state when subjected to the action of the reset spring (454) and the pressure relief chamber.

6. The motor housing press-fitting equipment according to claim 1, characterized in that: The housing heating assembly also includes two centering clamps (221) located on both sides of the cylindrical heating head (22). The two centering clamps (221) are respectively connected to the output end of the corresponding clamping cylinder (222). The clamping cylinder (222) is fixedly installed inside the frame (1).

7. The motor housing press-fitting equipment according to claim 1, characterized in that: The housing transfer assembly also includes a horizontal slide rail (3) fixed inside the frame (1), a horizontal slide block (31) slidably mounted on the outer side of the horizontal slide rail (3), and a vertical slide block (32) slidably mounted on the outer surface of the horizontal slide block (31). The vacuum suction head (33) is fixedly mounted on the outer surface of the vertical slide block (32).

8. The motor housing press-fitting equipment according to claim 1, characterized in that: The pressing assembly also includes a transfer slide rail (401) fixedly installed inside the frame (1) and a transfer slide table (402) slidably installed on the outer surface of the transfer slide rail (401). The pressing cylinder (4) is fixedly installed on the outer surface of the transfer slide table (402). The pressing assembly can move between the heating station and the pressing station to drive the motor housing attracted by the electromagnet (43) to transfer.

9. The motor housing press-fitting equipment according to claim 1, characterized in that: The top of the material placement positioning rod (21) is provided with an upward-convex guide slope that is adapted to the center hole of the motor housing, so that the motor housing slides along the guide slope during the lowering process and completes precise positioning.

10. The motor housing press-fitting equipment according to claim 1, characterized in that: The upper surface of the stator placement seat (51) is provided with a placement recess that matches the outer circle of the stator, and a central limiting block is provided in the middle of the placement recess to radially position the stator.

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