Automatic press-fitting device for spinning valve core sealing ring

Abstract

The utility model discloses a kind of automatic press-fitting devices of spinning valve core sealing ring, including upper plate, lower plate, fixture plate, lifting drive mechanism, stepper motor, connecting assembly and pressure head, lifting drive mechanism is installed in upper plate and its power output end is installed with flange joint, flange joint is fixedly installed on lower plate;Lifting drive mechanism drives lower plate to lift;Lower plate is fixedly connected with a base by multiple support rods, stepper motor is fixedly installed on the base, the end of the main shaft of stepper motor is connected with one end of connecting assembly, and the other end of connecting assembly is installed pressure head;Rotating pressure head is driven by stepper motor cooperation connecting assembly;Fixture plate is located directly below the pressure head, and fixture is installed on fixture plate for placing valve core.The utility model solves the problem of poor sealing caused by deflection or overload in traditional press-fitting, significantly improves the press-fitting accuracy and efficiency, and is suitable for high requirement sealing assembly scene such as automobile valve body, electronic electromagnetic valve etc.

Description

Technical Field

[0001] This utility model relates to the field of mechanical device technology, and in particular to an automatic pressing device for a spun valve core sealing ring. Background Technology

[0002] Previously, traditional press-fitting mechanisms for inserting sealing rings into valve cores mostly used a linear press-fit method, directly pressing the rubber plug (or sealing ring) vertically into the valve core hole. This method is prone to uneven force, leading to deformation of the rubber plug or scratches on the hole wall, affecting sealing performance. During manual operation, assembly quality highly depends on the operator's experience, often resulting in inconsistent pressing depth and misaligned sealing rings, leading to a low product qualification rate. While some existing automated press-fitting equipment has improved efficiency, it still has the following shortcomings: when using purely linear press-fitting, the frictional resistance between the rubber plug and the hole wall is relatively high, potentially causing damage to the plug surface. Furthermore, traditional equipment often requires replacing the entire set of fixtures and press heads when switching between different valve core specifications, which is cumbersome and affects production efficiency.

[0003] Therefore, the purpose of this invention is to provide an automated press-fitting mechanism that can achieve precise control through rotational pressing, adapt to various specifications, and does not damage the seals. Utility Model Content

[0004] The main technical problem solved by this utility model is to provide an automatic pressing device for a spun valve core sealing ring, which solves the problem of poor sealing caused by misalignment or overload in traditional pressing, and significantly improves the pressing accuracy and efficiency. It is suitable for high-requirement sealing assembly scenarios such as automotive valve bodies and electronic solenoid valves.

[0005] To solve the above-mentioned technical problems, the present invention provides a technical solution as follows: an automatic pressing device for a spinning valve core sealing ring is provided, comprising an upper plate, a lower plate, a fixture plate, a lifting drive mechanism, a stepper motor, a connecting assembly, and a pressing head. The lifting drive mechanism is mounted on the upper plate, and a flange joint is installed at its power output end. The flange joint is fixedly mounted on the lower plate. The lower plate is driven to rise and fall by the lifting drive mechanism.

[0006] The lower plate is fixedly connected to a base by multiple support rods. The stepper motor is fixedly mounted on the base. The end of the spindle of the stepper motor is connected to one end of the connecting assembly, and the other end of the connecting assembly is equipped with the pressure head. The pressure head is driven to rotate by the stepper motor in cooperation with the connecting assembly.

[0007] The fixture plate is located directly below the pressure head, and a fixture for placing the valve core is mounted on the fixture plate.

[0008] Furthermore, the lifting drive mechanism is a servo electric lever.

[0009] Furthermore, the pressing device also includes four guide rods, which pass through the through holes of the lower plate and are mounted on the upper plate and the lower plate of the fixture plate. The guide rods and the through holes are connected by linear bearings.

[0010] Furthermore, the connecting assembly includes a drive shaft sleeve and a rotary bearing. The upper end of the drive shaft sleeve is fixed to the main shaft, the pressure head is detachably installed at the lower end of the drive shaft sleeve, and the rotary bearing is installed between the drive shaft sleeve and the base.

[0011] Furthermore, the linear bearing has a motion accuracy of ±0.01mm and uses a resin bushing.

[0012] Furthermore, the flatness of the working surface of the pressure head should be controlled to ≤0.005mm; the surface roughness Ra of the working surface should be ≤0.4μm.

[0013] The beneficial effects of this utility model are:

[0014] This utility model features an ingenious structural design that solves the sealing problems caused by misalignment or overload in traditional press-fitting processes, significantly improving press-fitting accuracy and efficiency. It is suitable for high-requirement sealing assembly scenarios such as automotive valve bodies and electronic solenoid valves. Furthermore, it greatly reduces press-fitting time, eliminates the need for manual installation, reduces product defect rates, and boasts a simplified structure.

[0015] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0016] Figure 1 This is one of the structural schematic diagrams of this utility model;

[0017] Figure 2 This is the second structural schematic diagram of this utility model (partial structure);

[0018] Figure 3 This is an axial sectional view (partial structure) of this utility model.

[0019] The parts in the attached diagram are labeled as follows:

[0020] Upper plate 1, lower plate 2, fixture plate 3, lifting drive mechanism 4, servo motor 41, electric cylinder 42, stepper motor 5, pressure head 6, flange joint 7, support rod 8, base 9, fixture 10, guide rod 11, linear bearing 12, transmission shaft sleeve 13, slewing bearing 14. Detailed Implementation

[0021] The following specific embodiments illustrate the detailed implementation of this utility model. Those skilled in the art can easily understand the advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented in other different ways, that is, different modifications and changes can be made without departing from the scope disclosed in this utility model.

[0022] The descriptions of positions such as up, down, left, and right in this embodiment are based on the orientation in the accompanying drawings, have no special meaning, and are not intended to limit the scope of protection of this utility model.

[0023] Example: An automatic pressing device for a spin-type valve core seal ring, such as... Figures 1 to 3 As shown, it includes an upper plate 1, a lower plate 2, a fixture plate 3, a lifting drive mechanism 4, a stepper motor 5, a connecting assembly, and a pressure head 6. The lifting drive mechanism is installed on the upper plate and its power output end is equipped with a flange joint 7. The flange joint is fixedly installed on the lower plate. The lower plate is driven to rise and fall by the lifting drive mechanism.

[0024] The lower plate is fixedly connected to a base 9 by multiple support rods 8. The stepper motor is fixedly installed on the base. The end of the spindle of the stepper motor is connected to one end of the connecting assembly, and the other end of the connecting assembly is equipped with the pressure head. The pressure head is driven to rotate by the stepper motor in cooperation with the connecting assembly.

[0025] The fixture plate is located directly below the pressure head, and a fixture 10 for placing the valve core is mounted on the fixture plate.

[0026] In this embodiment, the lifting drive mechanism is a servo electric lever.

[0027] In this embodiment, the servo electric cylinder includes a servo motor 41 and an electric cylinder 42. The power output end of the servo motor is connected to one end of the electric cylinder, and the power output shaft of the electric cylinder is fixedly connected to the flange joint. The servo motor receives control commands (such as position, speed, or torque) through a servo driver, adjusts the power supply in real time, and feeds back the actual operating parameters through an encoder, forming a closed-loop control. The electric cylinder, as an actuator, converts the rotational motion of the motor into linear motion (such as through a ball screw) to achieve high-precision positioning.

[0028] In this embodiment, the pressing device further includes four guide rods 11. The guide rods pass through the through holes of the lower plate and are mounted on the upper plate and the lower plate of the fixture plate. The guide rods and the through holes are connected by linear bearings 12.

[0029] Four linear bearings and four guide rods serve as guides to ensure that the structure mounted on the lower plate moves vertically and prevents skewing.

[0030] In this embodiment, the connecting assembly includes a drive shaft sleeve 13 and a rotary bearing 14. The upper end of the drive shaft sleeve is fixed to the main shaft, and the pressure head is detachably installed at the lower end of the drive shaft sleeve. The rotary bearing is installed between the drive shaft sleeve and the base.

[0031] In this embodiment, the linear bearing has a motion accuracy of ±0.01mm and uses a resin bushing.

[0032] In this embodiment, the flatness of the working surface of the pressure head (the lower surface in this embodiment) should be controlled to be ≤0.005mm; the surface roughness Ra of the working surface should be ≤0.4μm.

[0033] In this embodiment, a servo motor and an electric cylinder (i.e., a lifting drive mechanism) are used in conjunction with a stepper motor for coordinated control, achieving high-precision lifting and rotational alignment during the pressing process. The servo motor and electric cylinder, along with a structure consisting of a flange joint, guide rod, and linear bearing, drive the lower platen's lifting, ensuring the stability of the press head's vertical downward movement. The stepper motor drives the press head's rotation via a transmission shaft sleeve, ensuring precise alignment between the sealing ring and the valve core. A fixture is fixed on the fixture plate, used to hold the valve core. A photoelectric sensor can also detect positional deviations, and the system automatically adjusts the pressing parameters. When the sealing ring does not reach the preset position, the stepper motor fine-tunes its rotation angle to compensate for the offset, and the servo electric cylinder precisely controls the pressing force and depth.

[0034] The pressing precision process of this device is as follows: The servo electric cylinder uses a servo motor + electric lever transmission, and the position control accuracy can reach ±0.01mm, far exceeding the typical accuracy of ±0.1mm for pneumatic cylinders. The linear bearing motion accuracy is ±0.01mm, and the resin bushing reduces motion resistance, making it more suitable for high-speed reciprocating motion than metal bushings. The top and bottom mounting surfaces of the four guide rods must be on the same horizontal plane (tolerance within ±0.02mm) to ensure that the lower plate moves without tilting; and they must be parallel to each other (tolerance ≤0.01mm / m) to avoid linear bearing jamming. The flatness of the working surface of the pressure head should be controlled within ≤0.005mm to ensure uniform contact with the sealing ring; the surface roughness Ra of the working surface Ra≤0.4μm to reduce friction and sealing ring wear; the connection surface with the transmission sleeve must ensure perpendicularity ≤0.01mm to prevent uneven loading.

[0035] This press-fitting device combines a rigid guide structure with closed-loop control, solving the problem of poor sealing caused by misalignment or overload in traditional press-fitting. It significantly improves press-fitting accuracy and efficiency, and is suitable for high-requirement sealing assembly scenarios such as automotive valve bodies and electronic solenoid valves.

[0036] This device has excellent resistance to eccentric loads and long-term stability. Its innovation lies in combining precision linear motion with rotational compensation to reduce the product defect rate.

[0037] The working principle and process of this utility model:

[0038] Place the valve core into the fixture, then place the sealing ring into the corresponding position of the valve core. Then, the servo motor drives the lead screw of the electric cylinder to press down. The lead screw drives the lower plate to move, and the lower plate forces the four linear bearings to make linear motion on the guide rod. After the lower plate descends to the position, the stepper motor rotates, causing the transmission sleeve to rotate, thus causing the pressure head to rotate. The rotating and pressing action presses the sealing ring into the valve core.

[0039] The lower plate descending into position can be achieved by using a photoelectric sensor to detect the pressure head.

[0040] The above description is merely an embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structure made using the contents of the present utility model specification and drawings, or directly or indirectly applied to other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. An automatic pressing device for a spin-type valve core sealing ring, characterized in that: The system includes an upper plate (1), a lower plate (2), a jig plate (3), a lifting drive mechanism (4), a stepper motor (5), a connecting assembly, and a pressure head (6). The lifting drive mechanism is installed on the upper plate and has a flange joint (7) installed on its power output end. The flange joint is fixedly installed on the lower plate. The lower plate is driven to lift and lower by the lifting drive mechanism. The lower plate is fixedly connected to a base (9) by multiple support rods (8). The stepper motor is fixedly installed on the base. The end of the spindle of the stepper motor is connected to one end of the connecting assembly. The other end of the connecting assembly is equipped with the pressure head. The pressure head is driven to rotate by the stepper motor in cooperation with the connecting assembly. The fixture plate is located directly below the pressure head, and a fixture (10) for placing the valve core is mounted on the fixture plate.

2. The automatic pressing device for the spun valve core sealing ring according to claim 1, characterized in that: The lifting drive mechanism is a servo electric lever.

3. The automatic pressing device for the spun valve core sealing ring according to claim 1, characterized in that: The pressing device also includes four guide rods (11), which pass through the through holes of the lower plate and are mounted on the upper plate and the lower plate of the fixture plate. The guide rods and the through holes are connected by linear bearings (12).

4. The automatic pressing device for the spun valve core sealing ring according to claim 1, characterized in that: The connecting assembly includes a drive shaft sleeve (13) and a rotary bearing (14). The upper end of the drive shaft sleeve is fixed to the main shaft, and the pressure head is detachably installed at the lower end of the drive shaft sleeve. The rotary bearing is installed between the drive shaft sleeve and the base.

5. The automatic pressing device for the spun valve core sealing ring according to claim 3, characterized in that: The linear bearing has a motion accuracy of ±0.01mm and uses a resin bushing.

6. The automatic pressing device for the spun valve core sealing ring according to claim 1, characterized in that: The flatness of the working surface of the pressure head should be controlled within ≤0.005mm; the surface roughness Ra of the working surface should be ≤0.4μm.

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