Automatic press-fitting device for electromagnetic valve spool

Abstract

The application discloses an electromagnetic valve spool automatic press-fitting device, and relates to the technical field of intelligent manufacturing equipment, aiming to solve the technical problem of low press-fitting quality of an electromagnetic valve spool, comprising a press-fitting mechanism, a valve body clamp and a righting guide mechanism are arranged on the press-fitting mechanism, the clamping center of the valve body clamp and the guide center of the righting guide mechanism are located on the same vertical axis; the righting guide mechanism comprises a moving arm, a guide base, a petal type calibration assembly and a pretreatment assembly, the petal type calibration assembly is arranged on the guide base in a ring shape and moves at equal intervals, and the pretreatment assembly is arranged on the petal type calibration assembly in a vertical and equal interval manner; the pretreatment assembly has a first working state of pre-dust removal on the outer wall of the spool rod and a second working state of pre-lubricant coating. The application has the advantages of high centering precision, effective prevention of spool rod deflection damage and stable and reliable press-fitting quality.

Description

Technical Field

[0001] This invention relates to the field of intelligent manufacturing equipment technology, and more specifically, to an automatic pressing device for solenoid valve cores. Background Technology

[0002] As a core actuator in industrial automation control systems, the assembly accuracy of solenoid valves directly affects the overall response speed and sealing reliability of the machine. The press-fitting process between the valve core and body is a critical step in solenoid valve production. Currently, the industry commonly uses manual-assisted semi-automatic equipment for this process. Operators must first fix the valve body on a simple tooling table, hold the valve core, align it with the mounting hole on the valve body for pre-positioning, and then start a small press to complete the press-fitting action. This operating mode has the following prominent problems: First, the valve core stem is a slender shaft structure with a generally large difference in length-to-diameter ratio, making it highly susceptible to radial misalignment during manual pre-positioning and the moment of contact when the pressure head descends. Even a slight angular deviation between the valve core axis and the valve body bore axis can cause bending and deformation of the valve core stem, scratches on the inner wall of the valve bore, and even damage to the sealing surface of the valve core head during press-fitting, severely impacting the first-pass yield of the finished product. Some companies use guide sleeves for auxiliary positioning, but a clearance still exists between the guide sleeve and the valve core, failing to fundamentally eliminate the risk of misalignment.

[0003] Secondly, with the widespread adoption of intelligent manufacturing technologies, such as the increasingly mature flexible application of industrial robots in assembly, the manufacturing industry has higher expectations for high-precision, high-reliability automated specialized equipment. Therefore, developing an automated pressing device capable of high-precision guiding and positioning of valve cores, continuous pressing capability, and controllable quality has become a pressing technical issue in the field of solenoid valve manufacturing. In light of this, we propose an automatic pressing device for solenoid valve cores. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic pressing device for solenoid valve cores to solve the technical problem of low pressing quality of solenoid valve cores.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an automatic pressing device for a solenoid valve core, comprising a pressing mechanism, wherein the pressing mechanism is provided with a valve body clamp and a straightening guide mechanism, wherein the clamping center of the valve body clamp and the guiding center of the straightening guide mechanism are located on the same vertical axis; The straightening and guiding mechanism includes a movable arm, a guide base, a petal-type calibration component, and a pre-treatment component. The movable arm is mounted on the pressing mechanism, the guide base is mounted on the moving end of the movable arm, the petal-type calibration component is movably mounted on the guide base in a ring with equal spacing, and the pre-treatment component is mounted on the petal-type calibration component in a vertical and equal spacing. The pretreatment component has a first working state of pre-dust removal on the outer wall of the valve core rod, and a second working state of pre-coating the outer wall of the valve core rod with lubricant.

[0006] Preferably, the straightening and guiding mechanism further includes a displacement component and an axial drive component. The displacement component is arranged in a ring at equal intervals on the guide base. The petal-shaped calibration component is fixedly connected to the displacement component. The pretreatment components are arranged vertically at equal intervals on the petal-shaped calibration component. The axial drive component is disposed inside the petal-shaped calibration component and meshed with several of the pretreatment components. The axial drive component is used to drive several of the pretreatment components to move synchronously on the petal-shaped calibration component to switch working states.

[0007] Preferably, the pressing mechanism is provided with an automatic feeding mechanism on the back, which is used to transport the valve core to be pressed to the valve body clamp.

[0008] Preferably, the guide base includes a base, a guide groove, and an internal threaded hole. The base is fixedly disposed on the moving end of the moving arm. The guide groove is opened in a ring at equal intervals on the base. The internal threaded hole is opened in a ring at equal intervals on the outer wall of the base. The displacement component is disposed on the internal threaded hole.

[0009] Preferably, the displacement assembly includes a movable rod, an external threaded groove, an internal spline, a motor, and an external spline. The motor is fixedly disposed on the outer wall of the base, the external spline is disposed at the output end of the motor, the external threaded groove is formed on the movable rod, the movable rod is threadedly connected to the internal threaded hole, the internal spline is formed inside the movable rod, and the external spline and the internal spline are movably inserted into each other. The petal-type calibration assembly is movably connected to the end of the movable rod away from the motor.

[0010] Preferably, the flap calibration assembly includes an inverted cone flap and a straight flap. One end of the inverted cone flap is movably connected to the displacement assembly, and the other end of the inverted cone flap is slidably connected to the guide base. The straight flap is fixedly connected to the bottom end of the inverted cone flap.

[0011] Preferably, a transition block is fixedly provided on the outer wall of the inverted cone-shaped segment, the displacement component is rotatably inserted into the transition block, a suspension rod is fixedly provided at the top of the inverted cone-shaped segment, and the inverted cone-shaped segment is slidably disposed on the guide base through the suspension rod.

[0012] Preferably, the outer wall of the straight cylindrical petal is provided with vertically spaced slots, the pretreatment component is rotatably mounted on the slots, and the inside of the straight cylindrical petal is fixedly provided with vertically spaced extrusion rods, the extrusion rods and the pretreatment component are located at the same horizontal height.

[0013] Preferably, the pretreatment component includes a calibration ellipse, a first cavity, a second cavity, an air outlet groove, a roller groove, a gear rod, and a back groove. The calibration ellipse is rotatably mounted on the petal-shaped calibration component via the gear rod. The first cavity is located at the top inside of the calibration ellipse, the second cavity is located at the bottom inside of the calibration ellipse, the air outlet groove is located on the outer wall of the top of the calibration ellipse, the roller groove is located on the outer wall of the bottom of the calibration ellipse, and the back groove is located at the end of the top of the calibration ellipse away from the air outlet groove.

[0014] Preferably, the pretreatment component further includes an airbag, an air nozzle, and an applicator roller. The airbag is disposed in the first cavity, one end of the air nozzle is fixedly connected to the airbag, the other end of the air nozzle is fixedly connected to the air outlet groove, and the applicator roller is rotatably disposed on the roller groove.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention provides a centering and guiding mechanism consisting of a displacement component, a guide base, and a flap calibration component. The guide groove and internal threaded hole of the guide base provide precise radial sliding guidance and threaded self-locking for the displacement component. The displacement component uses a composite structure of threaded drive and spline drive to drive the flap calibration component to feed radially synchronously. This enables the centering and guiding mechanism to adapt to the radial dimensions of valve core rods of different specifications and achieve high-precision centering and clamping. It effectively solves the problem of slender valve core rods being skewed and bent due to insufficient guiding accuracy in traditional press-fitting devices. It significantly improves the versatility and centering reliability of the device. Its automation level and operating accuracy can meet the production line cycle requirements of collaborative operation of industrial robots.

[0016] 2. This invention sets the valve core calibration component as a composite structure of an inverted conical valve core and a straight valve core. During the closing process, the conical surface of the inverted conical valve core first contacts the top of the valve core rod and utilizes its self-centering property to guide the valve core rod towards the central axis for flexible alignment. The straight valve core then embraces the straight section of the valve core rod to form a cylindrical guide channel, providing precise radial constraint and axial guidance. This structure ensures that the valve core rod is first flexibly guided and then rigidly constrained during calibration, effectively avoiding hard collisions and surface scratches caused by initial positional deviations. It balances the smoothness of the calibration action with the stability of the guiding accuracy, fundamentally guaranteeing the press-fit coaxiality and surface integrity of the slender valve core rod.

[0017] 3. This invention, by dividing the calibration ellipse of the pretreatment component into a first cavity and a second cavity, and configuring an air bladder and a coating roller in each cavity, allows a single pretreatment component to sequentially complete the dual pretreatment processes of adsorption and dust removal and solid lubricant coating on the outer wall of the valve core rod before press-fitting. This structure eliminates the need for additional air sources and oiling devices, automatically removing surface impurities and forming a uniform lubricating medium layer before the valve core rod enters the valve body. This effectively reduces the press-fitting frictional resistance between the valve core rod, sealing ring, and valve body, avoiding press-fitting damage and sealing failure caused by impurity intrusion or insufficient lubrication, and significantly improving the first-pass yield and product lifespan of the solenoid valve core press-fitting. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall front structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the overall rear structure of the present invention.

[0020] Figure 3 This is a side view of the structure of the present invention.

[0021] Figure 4 This is a schematic diagram of the pressing mechanism, automatic feeding mechanism and straightening and guiding mechanism of the present invention.

[0022] Figure 5 This is a schematic diagram of the straightening guide mechanism, pressing mechanism and valve body clamp structure of the present invention.

[0023] Figure 6 This is a schematic diagram of the straightening guide mechanism and valve body clamp structure of the present invention.

[0024] Figure 7 This is a cross-sectional schematic diagram of the internal structure of the straightening and guiding mechanism of the present invention.

[0025] Figure 8 This is a schematic diagram of the guide base structure of the present invention.

[0026] Figure 9 This is a schematic diagram of the disassembled structure of the displacement component and the lobe-type calibration component of the present invention.

[0027] Figure 10 This is a cross-sectional view of the internal structure of the petal-type calibration component of the present invention.

[0028] Figure 11 This is a schematic diagram of the axial drive component and pretreatment assembly of the present invention.

[0029] Figure 12 This is a schematic diagram of the internal structure of the calibration ellipse of the present invention.

[0030] Figure 13This is a schematic diagram of the calibration ellipse and extrusion rod structure of the present invention.

[0031] Figure 14 This is a schematic diagram of the side view of the calibration ellipse cross section of the present invention.

[0032] Figure 15 This is a schematic diagram of the uprighting and guiding mechanism of the present invention in use.

[0033] Explanation of the labels in the diagram: 1. Pressing mechanism; 2. Automatic feeding mechanism; 3. Valve body clamp; 4. Straightening and guiding mechanism; 41. Moving arm; 42. Guide base; 43. Displacement assembly; 44. Lobe-type calibration assembly; 45. Pre-treatment assembly; 46. Axial drive component; 421. Matrix; 422. Guide groove; 423. Internal threaded hole; 431. Movable rod; 432. External thread groove; 433. Internal spline; 434. Motor; 435. External spline; 441. Inverted cone-shaped valve; 442. Straight valve; 4411, Adapter block; 4412, Suspension rod; 4421, Groove; 4422, Extrusion rod; 451. Calibration ellipse; 452. First cavity; 453. Second cavity; 454. Air outlet groove; 455. Roller groove; 456. Gear rod; 457. Back groove; 458. Air bag; 459. Air nozzle; 450. Application roller. Detailed Implementation

[0034] like Figures 1 to 15 As shown, the present invention relates to an automatic pressing device for a solenoid valve core, comprising a pressing mechanism 1, wherein a valve body clamp 3 and a straightening and guiding mechanism 4 are provided on the pressing mechanism 1, and the clamping center of the valve body clamp 3 and the guiding center of the straightening and guiding mechanism 4 are located on the same vertical axis. The straightening and guiding mechanism 4 includes a movable arm 41, a guide base 42, a petal-type calibration component 44, and a pretreatment component 45. The movable arm 41 is mounted on the pressing mechanism 1, the guide base 42 is mounted on the moving end of the movable arm 41, the petal-type calibration component 44 is movably mounted on the guide base 42 in a ring with equal spacing, and the pretreatment component 45 is mounted on the petal-type calibration component 44 in a vertical and equal spacing. The pretreatment assembly 45 has a first working state of pre-dust removal on the outer wall of the valve core rod, and a second working state of pre-coating the outer wall of the valve core rod with lubricant.

[0035] In this embodiment of the invention, when the automatic pressing device for the solenoid valve core is working, the valve body to be pressed is first placed in the valve body clamp 3 and clamped and fixed. At this time, the clamping center of the valve body clamp 3 and the guiding center of the straightening and guiding mechanism 4 have been pre-calibrated to the same vertical axis. Subsequently, the moving arm 41 drives the guide base 42 to move to the working position, so that the petal-shaped calibration component 44, which is movably arranged in a ring at equal intervals on the guide base 42, surrounds the outer circumference of the valve core rod to be pressed. During the process of the valve core rod entering the straightening and guiding mechanism 4, the pre-treatment component 45, which is arranged vertically at equal intervals on the petal-shaped calibration component 44, first contacts the outer wall of the valve core rod and enters the first working state to perform pre-dust removal treatment on the outer wall of the valve core rod to remove impurity particles attached to the surface; as the valve core rod continues to move axially, the pre-treatment component 45 switches to the second working state to perform pre-lubricant treatment on the outer wall of the valve core rod to form a uniform lubricating medium layer on the surface of the valve core rod. The aforementioned pre-dust removal and pre-lubricant application processes are completed simultaneously under the surrounding guidance of the flap-type calibration component 44, after which the valve core rod is smoothly pressed into the valve body along the vertical axis.

[0036] This device, by coaxially setting the valve body clamp 3 and the straightening guide mechanism 4, and combining the surrounding structure layout of the flap calibration component 44, enables the pretreatment component 45 to perform dual pretreatment of dust removal and lubrication on the outer wall of the valve core rod before pressing. This effectively avoids pressing deviation and surface damage caused by impurities or insufficient lubrication on the valve core rod surface, and significantly improves the first-pass yield and work efficiency of valve core pressing.

[0037] In an embodiment of the present invention, the straightening and guiding mechanism 4 further includes a displacement component 43 and an axial drive component 46. The displacement component 43 is arranged in a ring at equal intervals on the guide base 42. The petal-shaped calibration component 44 is fixedly connected to the displacement component 43. The pretreatment components 45 are arranged vertically at equal intervals on the petal-shaped calibration component 44. The axial drive component 46 is disposed inside the petal-shaped calibration component 44 and meshed with the pretreatment components 45. The axial drive component 46 is used to drive the pretreatment components 45 to move synchronously on the petal-shaped calibration component 44 to switch working states.

[0038] In this invention, the straightening and guiding mechanism 4 further includes a displacement component 43 and an axial drive component 46. In specific operation, the displacement component 43, arranged in a ring at equal intervals on the guide base 42, first drives the petal-shaped calibration components 44 fixedly connected thereto to generate radial displacement, causing each group of petal-shaped calibration components 44 to synchronously close towards the center or open outwards to accommodate the radial dimensions of valve core rods of different specifications and achieve centering and clamping. When the petal-shaped calibration components 44 are closed in place, the axial drive component 46 located within the petal-shaped calibration components 44 begins to operate, driving several pre-processing components 45, arranged vertically at equal intervals on the petal-shaped calibration components 44, to operate synchronously through a meshing connection, thereby allowing the pre-processing components 45 to smoothly switch between a first working state and a second working state.

[0039] In this embodiment, through the coordinated cooperation of the displacement component 43 and the axial drive component 46, the flap calibration component 44 not only has the ability to adapt to radial dimensions, but also realizes the synchronous and precise switching of the working state of the pretreatment component 45, which further improves the versatility of the straightening guide mechanism 4 and the stability of the pretreatment process, and provides a reliable guarantee for the precise pressing of the valve core rod in the future.

[0040] In an embodiment of the present invention, the back of the pressing mechanism 1 is provided with an automatic feeding mechanism 2, which is used to transport the valve core to be pressed to the valve body clamp 3.

[0041] In this invention, the automatic feeding mechanism 2 automatically transports the valve core to be press-fitted to the working position of the valve body clamp 3 via a preset conveying path. See [link to relevant documentation]. Figures 1 to 4 This enables continuous and orderly feeding of valve cores. During the conveying process, the automatic feeding mechanism 2 can pre-align the valve cores to be pressed, ensuring that the valve cores enter the clamping area of ​​the valve body clamp 3 with the correct orientation and position, thereby maintaining initial alignment with the guide center of the straightening guide mechanism 4.

[0042] In another embodiment of the present invention, the guide base 42 includes a base 421, a guide groove 422 and an internal threaded hole 423. The base 421 is fixedly disposed on the moving end of the moving arm 41. The guide groove 422 is opened in an annular shape at equal intervals on the base 421. The internal threaded hole 423 is opened in an annular shape at equal intervals on the outer wall of the base 421. The displacement component 43 is disposed on the internal threaded hole 423.

[0043] In this invention, the base 421 is fixedly mounted on the moving end of the moving arm 41, serving as the mounting base for the entire straightening and guiding mechanism 4. Guide grooves 422 are annularly spaced on the base 421, providing a guide trajectory for the radial movement of the displacement components 43. This ensures that each set of displacement components 43 slides smoothly along a preset direction during synchronous operation, preventing misalignment of the petal-type calibration component 44 due to deviations in the motion trajectory. Internal threaded holes 423 are annularly spaced on the outer wall of the base 421, and the displacement components 43 are installed in the internal threaded holes 423 via threaded engagement.

[0044] When the initial radial position of the displacement component 43 needs to be adjusted to accommodate valve core rods of different specifications, precise position pre-adjustment can be achieved simply by rotating the threaded connection between the displacement component 43 and the internal threaded hole 423. After adjustment, the position of the displacement component 43 is reliably locked by the internal threaded hole 423. In this embodiment, the cooperation between the guide groove 422 and the internal threaded hole 423 enables the displacement component 43 to have both precise radial sliding guidance and threaded self-locking positioning stability on the base 421. This effectively balances the flexibility of the centering guide mechanism 4 during operation with the rigidity retention after adjustment, further improving the centering accuracy and operational reliability of the flap calibration component 44.

[0045] In another embodiment of the present invention, the displacement component 43 includes a movable rod 431, an external threaded groove 432, an internal spline 433, a motor 434, and an external spline 435. The motor 434 is fixedly disposed on the outer wall of the base 421, the external spline 435 is disposed at the output end of the motor 434, the external threaded groove 432 is opened on the movable rod 431, the movable rod 431 is threadedly connected to the internal threaded hole 423, the internal spline 433 is opened in the movable rod 431, the external spline 435 and the internal spline 433 are movably inserted and engaged, and the petal-type calibration component 44 is movably connected to the end of the movable rod 431 away from the motor 434.

[0046] In this invention, the motor 434 starts and drives the internal spline 433 to rotate via the external spline 435 at the output end, thereby causing the movable rod 431 to rotate synchronously. Since the external threaded groove 432 of the movable rod 431 and the internal threaded hole 423 of the base 421 form a threaded engagement, the movable rod 431 generates precise linear displacement along its own axial direction while rotating, thereby pushing or pulling back the flap-type calibration component 44, realizing the radial feed and retraction of the flap-type calibration component 44. During this process, the movable insertion engagement of the external spline 435 and the internal spline 433 allows relative sliding between the movable rod 431 and the output end of the motor 434 during axial movement, ensuring reliable torque transmission and avoiding axial tension on the output shaft of the motor 434 due to the axial displacement of the movable rod 431.

[0047] This embodiment employs a composite structure of threaded drive and spline drive, enabling the displacement component 43 to drive the flap calibration component 44 to complete the radial centering action with high transmission accuracy and stability. At the same time, the fixed installation of the motor 434 effectively reduces the inertia of the moving parts, improves the response speed and positioning accuracy of the displacement component 43, and further enhances the reliability of the centering and clamping of the valve core rod by the straightening guide mechanism 4.

[0048] In an embodiment of the present invention, the flap calibration component 44 includes an inverted cone flap 441 and a straight flap 442. One end of the inverted cone flap 441 is movably connected to the displacement component 43, and the other end of the inverted cone flap 441 is slidably connected to the guide base 42. The straight flap 442 is fixedly connected to the bottom end of the inverted cone flap 441.

[0049] In this invention, when the displacement component 43 drives the inverted conical cylinder 441 to slide towards the center along the guide base 42, each group of inverted conical cylinder 441 closes synchronously. The inverted conical surface of its inner wall first contacts the top of the valve core rod or the conical transition section. The self-centering characteristic of the conical surface guides the valve core rod to approach the central axis, completing the initial centering calibration. As each group of inverted conical cylinder 441 continues to close, the straight cylinder 442 fixedly connected to the bottom of the inverted conical cylinder 441 hugs the outer wall of the straight rod section of the valve core rod, forming a cylindrical guide channel that matches the outer diameter of the valve core rod, providing precise radial constraint and axial guidance for the valve core rod.

[0050] In this embodiment, the valve core rod is configured as a composite structure of an inverted conical valve core rod 441 and a straight valve core rod 442. During the calibration process, the valve core rod is first guided by the conical surface of the inverted conical valve core rod 441 to achieve flexible centering, and then the straight valve core rod 442 provides rigid guiding constraint. This effectively avoids hard collisions and surface scratches caused by the initial position deviation of the valve core rod. At the same time, it takes into account the smoothness of the calibration action and the stability of the guiding accuracy, which significantly improves the calibration protection effect of the straightening guide mechanism 4 on the slender valve core rod.

[0051] In an embodiment of the present invention, a transition block 4411 is fixedly provided on the outer wall of the inverted cone-shaped petal 441, the displacement component 43 is rotatably inserted on the transition block 4411, and a hanging slide rod 4412 is fixedly provided at the top of the inverted cone-shaped petal 441. The inverted cone-shaped petal 441 is slidably disposed on the guide base 42 through the hanging slide rod 4412.

[0052] In this invention, when the displacement component 43 generates a feed or retraction displacement along the radial direction of the guide base 42, the movable rod 431 of the displacement component 43 is rotatably inserted into the transition block 4411. The linear motion of the movable rod 431 is transmitted to the inverted cone 441 through the transition block 4411, causing the inverted cone 441 to move radially synchronously. At the same time, the suspension rod 4412 fixed at the top of the inverted cone 441 slides along the corresponding guide structure on the guide base 42, providing stable suspension support and motion guidance for the radial movement of the inverted cone 441.

[0053] During this process, the rotational insertion between the movable rod 431 and the adapter block 4411 can effectively eliminate motion interference caused by machining errors or assembly deviations, so that the inverted cone petal 441 has a certain adaptive sway margin when it is pushed and moved, avoiding jamming; while the sliding fit between the lifting rod 4412 and the guide base 42 ensures that the inverted cone petal 441 always maintains a vertical posture during the movement, preventing overturning moment due to uneven center of gravity.

[0054] In another embodiment of the present invention, the outer wall of the straight cylinder 442 is provided with vertically spaced slots 4421, the pretreatment component 45 is rotatably mounted on the slots 4421, and the straight cylinder 442 is fixedly provided with vertically spaced extrusion rods 4422 inside the straight cylinder 442, the extrusion rods 4422 and the pretreatment component 45 are located at the same horizontal height.

[0055] In this invention, after each set of straight cylindrical petals 442 closes and embraces the outer wall of the valve core rod along with the inverted conical petals 441, the outer peripheral surface of the pretreatment component 45 contacts the outer wall of the valve core rod. At this time, the axial drive member 46 provided in the petal-type calibration component 44 drives each set of pretreatment components 45 to rotate synchronously in the slot 4421 through meshing connection.

[0056] In another embodiment of the present invention, the pretreatment component 45 includes a calibration ellipse 451, a first cavity 452, a second cavity 453, an air outlet groove 454, a roller groove 455, a gear rod 456, and a back groove 457. The calibration ellipse 451 is rotatably mounted on the petal-shaped calibration component 44 via the gear rod 456. The first cavity 452 is opened at the top inside of the calibration ellipse 451, the second cavity 453 is opened at the bottom inside of the calibration ellipse 451, the air outlet groove 454 is opened on the outer wall of the top of the calibration ellipse 451, the roller groove 455 is opened on the outer wall of the bottom of the calibration ellipse 451, and the back groove 457 is opened at the end of the top of the calibration ellipse 451 away from the air outlet groove 454.

[0057] In this invention, the gear rod 456 meshes with the axial drive component 46, which drives the calibration ellipse 451 to rotate via the gear rod 456. When the calibration ellipse 451 rotates until its major axis is perpendicular to the outer wall of the valve core rod, the outer wall of the calibration ellipse 451 exerts a radial pushing force on the valve core rod. This, combined with the synchronous action of each set of petal-type calibration components 44, achieves precise centering calibration of the valve core rod.

[0058] In an embodiment of the present invention, the pretreatment component 45 further includes an airbag 458, an air nozzle 459, and an applicator roller 450. The airbag 458 is disposed in the first cavity 452. One end of the air nozzle 459 is fixedly connected to the airbag 458, and the other end of the air nozzle 459 is fixedly connected to the air outlet groove 454. The applicator roller 450 is rotatably disposed on the roller groove 455.

[0059] In this invention, the calibration ellipse 451 is rotatably mounted on the straight cylinder 442 of the petal-type calibration assembly 44 via a gear rod 456. The gear rod 456 meshes with the axial drive member 46, allowing the calibration ellipse 451 to rotate around its own axis under the drive of the axial drive member 46. The calibration ellipse 451 is generally elliptical cylindrical, with a first cavity 452 at its top and a second cavity 453 at its bottom, the two cavities being independently arranged. An airbag 458 is provided inside the first cavity 452, and the airbag 458 has elastic recovery capability. One end of the air nozzle 459 is fixedly connected to the airbag 458, and the other end is fixedly connected to the air outlet groove 454 opened on the outer wall of the top of the calibration ellipse 451, so that the interior of the airbag 458 is only connected to the outside through the air nozzle 459 and the air outlet groove 454. A back groove 457 is provided at the top end of the calibration ellipse 451 away from the air outlet groove 454. The position of the back groove 457 corresponds to the extrusion rod 4422 on the straight cylinder 442. Solid lubricant is stored in the second cavity 453. A roller groove 455 communicating with the second cavity 453 is provided on the bottom outer wall of the calibration ellipse 451. The application roller 450 is rotatably mounted on the roller groove 455. Part of the outer peripheral surface of the application roller 450 is exposed outside the roller groove 455 and in contact with the solid lubricant in the second cavity 453.

[0060] In actual operation, the axial drive component 46 drives the calibration ellipse 451 to rotate via the gear rod 456, and completes the following actions sequentially within a complete working cycle: Firstly, in the dust removal working state. When the calibration ellipse 451 rotates until the back groove 457 is opposite to the extrusion rod 4422, the extrusion rod 4422 slides into the back groove 457 and squeezes the airbag 458 in the first cavity 452. The airbag 458 is compressed and deformed by radial compression, and the gas inside is discharged outward through the air nozzle 459 and the air outlet groove 454. As the calibration ellipse 451 continues to rotate, the back groove 457 gradually disengages from the extrusion rod 4422, and the extrusion rod 4422 releases its squeezing effect on the airbag 458. The airbag 458 quickly expands and returns to its original position due to its own elastic recovery force, forming an instantaneous negative pressure inside the airbag 458. This negative pressure is transmitted to the air outlet groove 454 through the air nozzle 459, sucking the dust and fine particles attached to the outer wall of the valve core rod into the airbag 458, completing non-contact vacuum adsorption dust removal. In this process, since the dust suction action of the airbag 458 only relies on the elastic recovery after compression, no external air source is required, making the structure compact and energy-saving and environmentally friendly.

[0061] Secondly, the lubrication operation. When the valve core rod completes calibration and continues to move downward through the straight cylinder 442, the calibration ellipse 451 rotates to a position where the roller groove 455 faces the outer wall of the valve core rod. At this time, the coating roller 450, which is rotated on the roller groove 455, comes into contact with the outer wall of the valve core rod or the sealing ring fitted on the valve core rod. The axial movement of the valve core rod drives the coating roller 450 to rotate passively within the roller groove 455. During the rotation, the coating roller 450 uniformly transfers and coats the solid lubricant adhering to its surface in the second cavity 453 onto the outer wall of the valve core rod or the surface of the sealing ring, forming a uniform lubricating medium layer. This effectively reduces the frictional resistance of the valve core rod, sealing ring, and valve body during press-fitting, facilitating the interference fit connection between the three.

[0062] This embodiment separates the first cavity 452 and the second cavity 453 within the calibration ellipse 451, and respectively equips them with an airbag 458 and an applicator roller 450. This allows a single pretreatment component 45 to sequentially perform the three functions of adsorption and dust removal, centering and calibration, and solid lubrication coating on the valve core rod during rotation, resulting in a highly integrated structure. Simultaneously, the intermittent cooperation between the extrusion rod 4422 and the back groove 457 enables the extrusion and release of the airbag 458, converting the axial movement of the valve core rod into the passive rotational driving force of the applicator roller 450. This achieves automated execution of the pretreatment process without the need for an additional power source, significantly improving the structural compactness and operational efficiency of the device. It also ensures the cleanliness and lubrication uniformity of the valve core rod surface, providing a reliable guarantee for subsequent high-quality pressing.

[0063] In an embodiment of the present invention, the axial drive member 46 can be a rack driven by an electric push rod. The rack synchronously meshes with several gear rods 456. The electric push rod feeds and drives the rack to move. The rack meshes with the gear rods 456. Since the gear rods 456 are fixedly inserted on the calibration ellipse 451, the several calibration ellipse 451 rotate synchronously.

[0064] Working principle: This embodiment provides a method for using an automatic pressing device for solenoid valve cores, including the following steps: Step 1: Valve body placement and positioning; The operator places the valve body to be press-fitted into the valve body clamp 3 on the press-fitting mechanism 1. The valve body clamp 3 clamps the valve body, so that the center of the valve body to be press-fitted hole and the guide center of the straightening guide mechanism 4 are on the same vertical axis, providing a position reference for the subsequent precise pressing of the valve core rod.

[0065] Step 2: Automatic feeding and initial positioning of the valve core rod; The automatic feeding mechanism 2 automatically transports the valve core rod to be pressed to the top of the valve body clamp 3, so that the lower end of the valve core rod is aligned with the inlet of the straightening guide mechanism 4; then the moving arm 41 drives the guide base 42 and the displacement component 43, the petal calibration component 44 and the pretreatment component 45 installed on it to move to the working position as a whole, so that the petal calibration component 44, which is distributed in a ring, surrounds the outer circumference of the valve core rod, completing the initial alignment between the straightening guide mechanism 4 and the valve core rod.

[0066] Step 3: Radial centering and calibration; The displacement component 43 drives the flap calibration component 44 to converge towards the center along the radial direction of the guide base 42. The inverted conical flap 441 in the flap calibration component 44 first contacts the top conical surface of the valve core rod, and uses the self-centering characteristic of the conical surface to guide the valve core rod to approach the central axis, completing the flexible centering calibration. Then the straight flap 442 hugs the outer wall of the straight section of the valve core rod to form a cylindrical guide channel, which provides precise radial constraint and axial guidance for the valve core rod, effectively preventing the slender valve core rod from deflecting or bending during the subsequent press-fitting process.

[0067] Step 4: Preprocessing state switching and execution; The axial drive component 46 drives the gear rod 456 to rotate, and the gear rod 456 drives the calibration ellipse 451 fixedly inserted thereon to rotate synchronously, so that the pretreatment component 45 switches between the following two working states: 4a. First working state: adsorption and dust removal; The calibration ellipse 451 rotates until the back groove 457 is opposite to the extrusion rod 4422. The extrusion rod 4422 slides into the back groove 457 and extrudes the air bladder 458 in the first cavity 452. The air bladder 458 compresses and exhausts the air. The calibration ellipse 451 continues to rotate so that the back groove 457 is disengaged from the extrusion rod 4422. The air bladder 458 elastically returns to its original position and expands to generate a momentary negative pressure. Through the air nozzle 459 and the air outlet groove 454, the dust and particulate matter attached to the outer wall of the valve core rod are sucked into the air bladder 458, completing the non-contact vacuum adsorption dust removal, ensuring the cleanliness of the valve core rod surface, and preventing impurities from entering the valve body hole and causing scratches or jamming.

[0068] 4b. Second working state: Lubrication coating; The calibration ellipse 451 is rotated until the roller groove 455 faces the outer wall of the valve core rod. The coating roller 450, which is mounted on the roller groove 455, rotates to contact the outer wall of the valve core rod or the sealing ring fitted on the valve core rod. The axial movement of the valve core rod during the subsequent pressing process drives the coating roller 450 to rotate passively. During the rotation, the coating roller 450 evenly transfers the solid lubricant in the second cavity 453 to the surface of the valve core rod or the sealing ring, forming a lubricating medium layer. This effectively reduces the frictional resistance of the valve core rod, the sealing ring and the valve body during pressing, facilitates the interference fit connection between the three and prevents pressing damage.

[0069] Step 5: Valve core press-fitting; The pressing mechanism 1 drives the valve core rod to move downward along the vertical axis, and under the guidance and constraint of the straight cylinder 442, it is smoothly pressed into the valve body hole that has been positioned on the valve body fixture 3, thus completing the automatic pressing of the solenoid valve core. Step Six: Reset and Continuous Operation; After pressing is completed, the displacement component 43 drives the flap calibration component 44 to open and reset radially, the moving arm 41 drives the straightening guide mechanism 4 to return to the initial position, the valve body clamp 3 releases the pressed valve body, the operator takes out the finished valve body and puts in the next set of valve bodies to be pressed; at the same time, the automatic feeding mechanism 2 transports the next valve core rod to be pressed to the working position, realizing the continuous automatic feeding of valve core rod and the semi-automatic cycle operation of valve body.

[0070] The embodiments disclosed in this invention are preferred embodiments, but are not limited thereto. Those skilled in the art can easily understand the spirit of this invention based on the above embodiments and make different extensions and variations, but as long as they do not depart from the spirit of this invention, they are all within the protection scope of this invention.

Claims

1. An automatic pressing device for a solenoid valve core, characterized in that, It includes a pressing mechanism (1), on which a valve body clamp (3) and a straightening and guiding mechanism (4) are provided. The clamping center of the valve body clamp (3) and the guiding center of the straightening and guiding mechanism (4) are located on the same vertical axis. The straightening and guiding mechanism (4) includes a movable arm (41), a guide base (42), a petal calibration component (44), and a pretreatment component (45). The movable arm (41) is mounted on the pressing mechanism (1), the guide base (42) is mounted on the moving end of the movable arm (41), the petal calibration component (44) is movably mounted on the guide base (42) in a ring with equal spacing, and the pretreatment component (45) is mounted on the petal calibration component (44) in a vertical and equal spacing. The pretreatment component (45) has a first working state of pre-dust removal on the outer wall of the valve core rod and a second working state of pre-coating the outer wall of the valve core rod with lubricant.

2. The automatic pressing device for solenoid valve cores according to claim 1, characterized in that, The straightening guide mechanism (4) further includes a displacement component (43) and an axial drive component (46). The displacement component (43) is arranged in a ring at equal intervals on the guide base (42). The petal calibration component (44) is fixedly connected to the displacement component (43). The pretreatment components (45) are arranged vertically at equal intervals on the petal calibration component (44). The axial drive component (46) is located inside the petal calibration component (44) and is meshed with several of the pretreatment components (45). The axial drive component (46) is used to drive several of the pretreatment components (45) to move synchronously on the petal calibration component (44) to switch working states.

3. The automatic pressing device for solenoid valve cores according to claim 1, characterized in that, The pressing mechanism (1) is provided with an automatic feeding mechanism (2) on the back. The automatic feeding mechanism (2) is used to transport the valve core to be pressed to the valve body clamp (3).

4. The automatic pressing device for solenoid valve cores according to claim 2, characterized in that, The guide base (42) includes a base (421), a guide groove (422) and an internal threaded hole (423). The base (421) is fixedly disposed on the moving end of the moving arm (41). The guide groove (422) is opened in a ring at equal intervals on the base (421). The internal threaded hole (423) is opened in a ring at equal intervals on the outer wall of the base (421). The displacement component (43) is disposed on the internal threaded hole (423).

5. The automatic pressing device for solenoid valve cores according to claim 4, characterized in that, The displacement component (43) includes a movable rod (431), an external threaded groove (432), an internal spline (433), a motor (434), and an external spline (435). The motor (434) is fixedly mounted on the outer wall of the base (421). The external spline (435) is located at the output end of the motor (434). The external threaded groove (432) is opened on the movable rod (431). The movable rod (431) is threadedly connected to the internal threaded hole (423). The internal spline (433) is opened inside the movable rod (431). The external spline (435) and the internal spline (433) are movably inserted into each other. The petal-type calibration component (44) is movably connected to the end of the movable rod (431) away from the motor (434).

6. The automatic pressing device for solenoid valve cores according to claim 2, characterized in that, The flap calibration component (44) includes an inverted cone flap (441) and a straight flap (442). One end of the inverted cone flap (441) is movably connected to the displacement component (43), and the other end of the inverted cone flap (441) is slidably connected to the guide base (42). The straight flap (442) is fixedly connected to the bottom end of the inverted cone flap (441).

7. The automatic pressing device for solenoid valve cores according to claim 6, characterized in that, The outer wall of the inverted cone-shaped tube (441) is fixedly provided with a transition block (4411), the displacement component (43) is rotatably inserted on the transition block (4411), the top end of the inverted cone-shaped tube (441) is fixedly provided with a hanging slide rod (4412), and the inverted cone-shaped tube (441) is slidably disposed on the guide base (42) through the hanging slide rod (4412).

8. The automatic pressing device for solenoid valve cores according to claim 7, characterized in that, The outer wall of the straight cylindrical petal (442) is provided with vertically spaced slots (4421), the pretreatment component (45) is rotatably mounted on the slots (4421), and the straight cylindrical petal (442) is fixedly provided with vertically spaced extrusion rods (4422) inside, the extrusion rods (4422) and the pretreatment component (45) are located at the same horizontal height.

9. The automatic pressing device for solenoid valve cores according to claim 1, characterized in that, The pretreatment component (45) includes a calibration ellipse (451), a first cavity (452), a second cavity (453), an air outlet groove (454), a roller groove (455), a gear rod (456), and a back groove (457). The calibration ellipse (451) is rotatably mounted on the petal-shaped calibration component (44) via the gear rod (456). The first cavity (452) is located at the top inside of the calibration ellipse (451), the second cavity (453) is located at the bottom inside of the calibration ellipse (451), the air outlet groove (454) is located on the outer wall of the top of the calibration ellipse (451), the roller groove (455) is located on the outer wall of the bottom of the calibration ellipse (451), and the back groove (457) is located at the end of the top of the calibration ellipse (451) away from the air outlet groove (454).

10. The automatic pressing device for solenoid valve cores according to claim 9, characterized in that, The pretreatment component (45) further includes an airbag (458), an air nozzle (459), and an applicator roller (450). The airbag (458) is disposed in the first cavity (452). One end of the air nozzle (459) is fixedly connected to the airbag (458), and the other end of the air nozzle (459) is fixedly connected to the air outlet groove (454). The applicator roller (450) is rotatably disposed on the roller groove (455).

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