Vacuum suction cup machining and cleaning device
By integrating jet assembly and cleaning assembly on the vacuum suction cup, the directional airflow and an adjustable cleaning scraper solves the problem that the vacuum suction cup is difficult to clean when cleaning complex or small structures, achieving a more efficient cleaning effect.
Patent Information
- Application Number
- CN202420973190.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-07
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-05-07
AI Technical Summary
It is difficult to completely clean the blind spots of complex or small structures during the cleaning process, and the brush cleaning effect is not good.
A vacuum suction cup processing and cleaning device is designed, using a combination of jet assembly and cleaning assembly. The jet assembly generates directional airflow through the jet to remove dirt. The cleaning assembly includes a handle, a threaded rod, a cleaning scraper and a sliding rod, which can be used according to The shape and material of the workpiece surface are adjusted to ensure efficient cleaning.
It significantly improves the cleaning efficiency and effect, and can effectively remove dirt and processing residues on the surface of the workpiece, especially in complex or small structures, solving the blind spots that are difficult to reach by brushes, and improving the comprehensiveness and depth of cleaning.
Smart Images

Figure CN222343644U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of suction cups, in particular to a vacuum suction cup processing and cleaning device. Background Art
[0002] A vacuum suction cup is a device that uses vacuum force to absorb and fix objects. It is usually made of soft and well-sealed materials such as rubber and silicone, and has a hollow structure. The working principle of this device is to connect to a vacuum pump or other vacuum source to extract the air in the plate to generate negative pressure, thereby forming a vacuum adsorption force between the suction cup and the object.
[0003] After searching, the existing Chinese patent (Announcement No.: CN219403399U) discloses a vacuum adsorption type suction cup, wherein a cleaning mechanism for cleaning the cavity of the suction cup is arranged in the cavity of the suction cup, and an air pipe port for connecting a vacuum machine to suck air to the suction cup is arranged on the front face of the suction cup, and the cleaning mechanism includes a bidirectional screw rod penetrating the right wall of the cavity of the suction cup, and a brush for cleaning the cavity of the suction cup is threadedly connected to the rod body of the bidirectional screw rod, and a drainage pipe for discharging cutting fluid and cutting waste chips in the cavity of the suction cup is arranged on the right side of the brush. After the workpiece adsorbed by the suction cup is processed, the bidirectional screw rod is driven to rotate by rotating the rotating handle, thereby driving the brush threadedly connected to the bidirectional screw rod to move left and right to clean the cavity of the suction cup, so that the cutting fluid is cleaned into the groove of the collection tank, and then the control switch is turned on to discharge the cutting fluid in the pipe of the drainage pipe, thereby realizing the cleaning of the cavity of the suction cup.
[0004] The above-mentioned vacuum adsorption suction cup adopts a technical solution to solve the problem that the inner cavity of the suction cup cannot be cleaned by a handle to drive the bidirectional screw to rotate, thereby driving the brush connected to the bidirectional screw to move left and right to clean the cavity of the suction cup with water. However, the cleaning effect of the brush is affected by the internal structure of the suction cup. For some more complex or small structures, it is difficult for the brush to completely clean them, leaving dead corners. Therefore, we propose a vacuum suction cup processing and cleaning device to solve the above problem. Utility Model Content
[0005] The utility model provides a vacuum suction cup processing and cleaning device, which solves the technical problem that the current vacuum adsorption type suction cup has a poor cleaning effect at dead corners.
[0006] In order to solve the above technical problems, the utility model provides a vacuum suction cup processing and cleaning device, comprising a suction cup, one side of the suction cup is fixedly connected to an air jet assembly, and one end of the suction cup away from the air jet assembly is rotatably connected to a cleaning assembly;
[0007] The jet assembly includes a support frame, a jet, a connecting pipe, and an air intake pipe. One end of the support frame is fixedly connected to a suction cup, the outside of the jet is installed on the support frame, one end of the connecting pipe is fixedly connected to the jet, the other end of the connecting pipe is fixedly connected to the air intake pipe, and one end of the air intake pipe is fixedly connected to the suction cup.
[0008] Adopting the above technical solution: The suction cup of the device is designed to achieve a firm vacuum adsorption, ensuring that the device is always firmly attached to the surface of the workpiece during the processing and cleaning process. A jet assembly is connected to one side of the suction cup to assist in cleaning and treating the surface of the workpiece. The jet assembly is designed to ensure that sufficient pressure and airflow are provided during the cleaning process to effectively remove dirt on the surface of the workpiece and particles generated by the processing. The connection of the support frame ensures the structural stability of the assembly, while the design of the connecting pipe and the air inlet pipe helps to guide and transmit the airflow required for the cleaning effect. The design of the connecting pipe and the air inlet pipe plays a key synergistic role. The connecting pipe transfers the airflow generated by the jet to the air inlet pipe, and the air inlet pipe ensures that the airflow can be targeted by the suction cup on the surface of the workpiece. This coordinated connection method ensures the efficient transmission of the cleaning effect and improves the performance and precision of the device in processing and cleaning.
[0009] Preferably, the cleaning assembly includes a handle, a threaded rod, a cleaning scraper, and a sliding rod. The outer side of the handle is rotatably connected to the suction cup, one end of the threaded rod is fixedly connected to the handle, one side of the cleaning scraper is threadedly connected to the threaded rod, and the other side of the cleaning scraper is slidably connected to the sliding rod.
[0010] Adopting the above technical solution: the cleaning assembly is the key part for cleaning the surface of the workpiece. The handle is connected to the suction cup as an operating rod, so that the operator can easily control the cleaning process. The fixed connection of the threaded rod to the handle ensures the stability of the cleaning scraper, so that it can apply appropriate pressure on the surface of the workpiece. The threaded connection of the cleaning scraper is on the threaded rod, and by adjusting the length of the threaded rod, the distance between the cleaning scraper and the workpiece surface can be controlled to meet different cleaning requirements. At the same time, the sliding connection of the cleaning scraper is on the sliding rod, so that the position and angle of the scraper can be easily adjusted during the cleaning process to adapt to the workpiece surface of different shapes and materials.
[0011] Preferably, a pipe expansion joint is installed on one side of the suction cup, and the end of the pipe expansion joint away from the suction cup is fixedly connected to a connector, and an interface is installed on the side of the suction cup close to the connector, and a switch valve is slidably connected to the outer side of the interface.
[0012] Adopting the above technical solution: the design of the pipe expansion joint allows the suction cup to adjust the length of the pipe during use. This is very beneficial for adapting to the shape and curvature of different workpiece surfaces, ensuring that the suction cup can be effectively attached to the workpiece surface of different shapes, and improving the applicability and flexibility of the device. The presence of the connector ensures the firm connection of the pipe expansion joint and ensures the stability and reliability of the pipe expansion joint. This helps to avoid loosening or falling off during use and improves the operational safety of the device. The function of the interface is to connect the pipe expansion joint and other cleaning components. This connection method enables the suction cup to communicate effectively with the cleaning system to ensure the coordinated operation of the cleaning effect. The presence of the interface enables different cleaning components to be easily connected or disconnected when needed, which improves the flexibility of the cleaning device. The function of the switch valve is to control the flow of air or liquid flow, thereby adjusting the working state of the cleaning system. By slidingly connecting to the outside of the interface, the operator can easily control the switch valve to achieve vacuum adsorption of the suction cup or flow control of other cleaning media. This design increases the controllability of the cleaning process and improves the operating efficiency of the device.
[0013] Preferably, the bottom end of the suction cup is fixedly connected to a bottom plate, the top end of the bottom plate is fixedly connected to a vacuum channel, the bottom end of the cleaning scraper is slidably connected to the top end of the bottom plate, and the top end of the cleaning scraper is slidably connected to the vacuum channel.
[0014] The above technical solution is adopted: the design of the bottom plate provides a stable support structure for the entire suction cup, ensuring that the suction cup can be evenly attached to the surface of the workpiece. The connection method of the bottom plate ensures the close combination between the suction cup and the bottom plate, increases the firmness of adsorption, and improves the working stability of the device. The existence of the vacuum channel provides the suction cup with the airflow channel required for vacuum adsorption. The vacuum channel is fixedly connected through the bottom plate to ensure that the airflow can be effectively transmitted to the bottom of the suction cup, thereby creating a strong vacuum adsorption effect. This design enables the suction cup to be firmly attached to the surface of the workpiece, improving the reliability and efficiency of adsorption. The cleaning scraper is connected to the top of the bottom plate through the bottom end sliding, ensuring that the scraper can move smoothly during the cleaning process and apply appropriate cleaning force to the surface of the workpiece. At the same time, the top end is slidably connected to the vacuum channel, so that the scraper will not hinder the airflow of the vacuum channel during the cleaning process, ensuring the adsorption effect while achieving efficient cleaning.
[0015] Preferably, the jet of the jet assembly fixedly connected to one side of the suction cup can adjust the jet force and direction so as to adjust the airflow during cleaning and detection according to the specific conditions of the cable surface.
[0016] Adopting the above technical solution: the jet design in the jet assembly has the function of adjusting the jet force and direction. Such a design allows customized cleaning and inspection processes according to the actual cable surface conditions. By adjusting the jet force, it can adapt to the material and degree of dirt on different surfaces to ensure the best performance of the cleaning effect. The connection of the jet to the jet assembly enables the jet to flexibly adjust the airflow as needed, providing customized processing capabilities for cleaning and inspection. The connection between the jet assembly and the suction cup ensures that the jet assembly can work with the suction cup to deliver the adjusted airflow to the workpiece surface. This helps to ensure that the airflow during cleaning and inspection is aimed at specific areas on the cable surface, improving the accuracy and efficiency of the operation.
[0017] Preferably, the cleaning scraper of the cleaning assembly is made of a wear-resistant material, and the surface of the cleaning scraper is designed with fine textures.
[0018] The above technical solution is adopted: the design of the cleaning scraper made of wear-resistant material takes into account the durability and long life in use, and the surface design with fine texture helps to increase the contact area between the cleaning scraper and the surface of the workpiece. Such a design can more effectively handle the dirt on different surfaces and improve the cleaning efficiency.
[0019] Compared with the related art, the utility model has the following beneficial effects:
[0020] 1. Compared with the traditional vacuum adsorption suction cup, the utility model realizes efficient cleaning and precise processing of the workpiece surface by setting up the cooperation of components such as the jet component, by fixing the jet component on one side of the suction cup and rotating the cleaning component on the other side. The jet component uses the directional airflow generated by the jet to effectively remove dirt and processing residues on the surface of the workpiece. The design of the pipe expansion joint and the switch valve enables the device to be adjusted according to the shape and curvature of the surface of different workpieces, thereby improving the applicability and flexibility. Compared with the traditional method of relying solely on brushes for cleaning, the jet and physical dual cleaning mechanism of the device significantly improves the cleaning efficiency and effect, especially when dealing with complex or fine structured workpieces, it can more effectively reach dead corners, solving the problem of brushes being difficult to clean thoroughly in traditional methods, thereby improving the comprehensiveness and depth of cleaning.
[0021] 2. In the utility model, by setting up the cleaning components and other components, the handle and the threaded rod, the cleaning scraper can slide smoothly on the surface of the workpiece, and by adjusting the distance and angle with the workpiece surface, the complex or small structure can be accurately cleaned. The wear resistance of the scraper material and the fine texture design on the surface increase the contact area, thereby improving the cleaning effect and effectively removing dirt and residues. Compared with the traditional technology that only relies on brushes for cleaning, it solves the problem of dead corners that are difficult to reach with brushes, and improves the comprehensiveness and depth of cleaning. In addition, the design of the vacuum channel maintains the stable adsorption capacity of the suction cup, ensuring stability and efficiency during the cleaning process. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a three-dimensional diagram of a vacuum suction cup processing and cleaning device;
[0023] Figure 2 It is a schematic diagram of the structure of an air jet assembly in a vacuum suction cup processing and cleaning device;
[0024] Figure 3 It is a schematic diagram of the structure of a cleaning component in a vacuum suction cup processing and cleaning device;
[0025] Figure 4 The present invention is a schematic diagram of the structure of a cleaning scraper in a vacuum suction cup processing and cleaning device.
[0026] Numbers in the figure: 1, suction cup; 2, jet assembly; 201, support frame; 202, jet; 203, connecting pipe; 204, air intake pipe; 3, pipe expansion joint; 4, connector; 5, interface; 6, switch valve; 7, cleaning assembly; 701, handle; 702, threaded rod; 703, cleaning scraper; 704, sliding rod; 8, bottom plate; 9, vacuum channel. DETAILED DESCRIPTION
[0027] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
[0028] Embodiment 1
[0029] like Figure 1-Figure 4 As shown, a vacuum suction cup 1 processing and cleaning device comprises a suction cup 1, one side of the suction cup 1 is fixedly connected to an air jet assembly 2, and one end of the suction cup 1 away from the air jet assembly 2 is rotatably connected to a cleaning assembly 7;
[0030] The jet assembly 2 includes a support frame 201, a jet 202, a connecting pipe 203, and an air inlet pipe 204. One end of the support frame 201 is fixedly connected to the suction cup 1, the outside of the jet 202 is mounted on the support frame 201, one end of the connecting pipe 203 is fixedly connected to the jet 202, the other end of the connecting pipe 203 is fixedly connected to the air inlet pipe 204, and one end of the air inlet pipe 204 is fixedly connected to the suction cup 1. The suction cup 1 of the device is designed to achieve firm vacuum adsorption to ensure that the device is always firmly attached to the surface of the workpiece during the processing and cleaning process. The jet assembly 2 is connected to one side of the suction cup 1 to assist in cleaning and processing the surface of the workpiece. The jet assembly 2 is designed to ensure that sufficient pressure and airflow are provided during the cleaning process to effectively remove dirt on the surface of the workpiece and particles generated by processing. The connection of the support frame 201 ensures the structural stability of the assembly, while the design of the connecting pipe 203 and the air inlet pipe 204 helps to guide and transmit the airflow required for the cleaning effect. The design of the connecting pipe 203 and the air inlet pipe 204 plays a key synergistic role. The connecting pipe 203 transmits the airflow generated by the jet 202 to the air inlet pipe 204, and the air inlet pipe 204 ensures that the airflow can be targeted by the suction cup 1 on the surface of the workpiece. This coordinated connection ensures efficient transmission of the cleaning effect and improves the performance and accuracy of the device in processing cleaning.
[0031] A pipe expansion joint 3 is installed on one side of the suction cup 1, and a connector 4 is fixedly connected to one end of the pipe expansion joint 3 away from the suction cup 1. An interface 5 is installed on the side of the suction cup 1 close to the connector 4, and a switch valve 6 is slidably connected to the outer side of the interface 5. The design of the pipe expansion joint 3 allows the suction cup 1 to adjust the length of the pipe during use. This is very useful for adapting to the shape and curvature of different workpiece surfaces, ensuring that the suction cup 1 can be effectively attached to the surface of workpieces of different shapes, improving the applicability and flexibility of the device, and the presence of the connector 4 ensures the firm connection between the pipe expansion joint 3 and other parts, and ensures the stability and reliability of the pipe expansion joint 3. This helps to avoid loosening or falling off during use, and improves the operational safety of the device. The function of the interface 5 is to connect the pipe 203 and the cleaning component 7. This connection method enables the suction cup 1 to communicate effectively with the cleaning system to ensure the coordinated operation of the cleaning effect. The presence of the interface 5 enables different cleaning components 7 to be easily connected or disconnected when needed, improving the flexibility of the cleaning device, and the function of the switch valve 6 is to control the flow of air or liquid flow, thereby adjusting the working state of the cleaning system. By slidingly connecting to the outside of the interface 5, the operator can conveniently control the switch valve 6 to achieve vacuum adsorption of the suction cup 1 or flow control of other cleaning media. This design increases the controllability of the cleaning process and improves the operating efficiency of the device;
[0032] The jet 202 of the jet assembly 2 fixedly connected to one side of the suction cup 1 can adjust the jet force and direction so as to adjust the airflow during the cleaning and inspection process according to the specific conditions of the cable surface. The jet 202 in the jet assembly 2 is designed with the function of adjusting the jet force and direction. Such a design allows customized cleaning and inspection processes according to the actual conditions of the cable surface. By adjusting the jet force, it is possible to adapt to the material and degree of dirt on different surfaces to ensure the best performance of the cleaning effect. The connection of the jet 202 to the jet assembly 2 enables the jet 202 to flexibly adjust the airflow as needed, providing customized processing capabilities for cleaning and inspection. The connection between the jet assembly 2 and the suction cup 1 ensures that the jet assembly 2 can work in conjunction with the suction cup 1 to deliver the adjusted airflow to the workpiece surface. This helps to ensure that the airflow during cleaning and inspection is aimed at specific areas of the cable surface, improving the accuracy and efficiency of the operation.
[0033] Embodiment 2
[0034] like Figure 3-Figure 4 As shown, the cleaning assembly 7 includes a handle 701, a threaded rod 702, a cleaning scraper 703, and a sliding rod 704. The outer side of the handle 701 is rotatably connected to the suction cup 1, one end of the threaded rod 702 is fixedly connected to the handle 701, one side of the cleaning scraper 703 is threadedly connected to the threaded rod 702, and the other side of the cleaning scraper 703 is slidably connected to the sliding rod 704. The cleaning assembly 7 is a key part for cleaning the surface of the workpiece. The handle 701 is connected to the suction cup 1 as an operating rod, so that the operator can easily control the cleaning process. The fixed connection of the threaded rod 702 to the handle 701 ensures the stability of the cleaning scraper 703, so that it can apply appropriate pressure on the surface of the workpiece. The threaded connection of the cleaning scraper 703 to the threaded rod 702 can control the distance between the cleaning scraper 703 and the surface of the workpiece by adjusting the length of the threaded rod 702 to meet different cleaning requirements. At the same time, the cleaning scraper 703 is slidably connected to the sliding rod 704, so that the position and angle of the scraper can be easily adjusted during the cleaning process to adapt to workpiece surfaces of different shapes and materials.
[0035] The bottom end of the suction cup 1 is fixedly connected with a bottom plate 8, the top end of the bottom plate 8 is fixedly connected with a vacuum channel 9, the bottom end of the cleaning scraper 703 is slidably connected to the top end of the bottom plate 8, and the top end of the cleaning scraper 703 is slidably connected to the vacuum channel 9. The design of the bottom plate 8 provides a stable support structure for the entire suction cup 1, ensuring that the suction cup 1 can be evenly attached to the surface of the workpiece. The connection method of the bottom plate 8 ensures the close combination between the suction cup 1 and the bottom plate 8, increases the firmness of adsorption, and improves the working stability of the device. The existence of the vacuum channel 9 provides the suction cup 1 with the airflow channel required for vacuum adsorption. The vacuum channel 9 is fixedly connected to the bottom plate 8 to ensure that the airflow can be effectively transmitted to the bottom of the suction cup 1, thereby creating a strong vacuum adsorption effect. This design enables the suction cup 1 to be firmly attached to the surface of the workpiece, improves the reliability and efficiency of adsorption, and the cleaning scraper 703 is slidably connected to the top end of the bottom plate 8 through the bottom end, ensuring that the scraper can move smoothly during the cleaning process and exert appropriate cleaning force on the surface of the workpiece. At the same time, the top end is slidably connected to the vacuum channel 9, so that the scraper does not hinder the airflow of the vacuum channel 9 during the cleaning process, ensuring the adsorption effect while achieving efficient cleaning;
[0036] The cleaning blade 703 of the cleaning assembly 7 is made of a wear-resistant material, and the surface of the cleaning blade 703 is designed with a fine texture. The design of the cleaning blade 703 made of a wear-resistant material takes into account durability and long life in use, and the surface design of the fine texture helps to increase the contact area between the cleaning blade 703 and the surface of the workpiece. Such a design can more effectively handle dirt on different surfaces and improve the cleaning efficiency.
[0037] Working principle: Figure 1-Figure 4As shown, first, the suction cup 1 realizes firm vacuum adsorption through the bottom plate 8 fixedly connected at the bottom and the vacuum channel 9 at the top, ensuring that the device can be evenly and firmly attached to the surface of the workpiece. The jet 202 is externally mounted on the support frame 201, and the jet 202 is connected to the air inlet pipe 204 through the connecting pipe 203, and the other end of the air inlet pipe 204 is fixedly connected to the suction cup 1, realizing the orderly transmission of the airflow. This structural arrangement allows the jet 202 to adjust the jet force and direction as needed, which can drive the airflow to act on the workpiece surface in a targeted manner, thereby effectively removing the dirt on the workpiece surface and the particles generated by processing. At the same time, a pipe expansion joint 3 is installed on one side of the suction cup 1. Through the connector 4 fixedly connected to the end away from the suction cup 1 and the interface 5 close to the connector 4, and the switch valve 6 slidably connected to the outside of the interface 5, the pipe length can be adjusted to remove the blown sewage from the range of the work surface. This design not only increases the applicability and flexibility of the device, but also improves the safety of operation and the controllability of the cleaning process. In addition, the cleaning component 7 is connected to the suction cup 1 by rotating on the outside of the handle 701, one end of the threaded rod 702 is fixedly connected to the handle 701, and one side of the cleaning scraper 703 is connected to the threaded rod 702 by threading, and the other side is slidably connected to the sliding rod 704. By adjusting the length of the threaded rod 702, the distance between the cleaning scraper 703 and the workpiece surface can be controlled to achieve effective cleaning of the workpiece surface.
[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A vacuum suction cup processing and cleaning device, comprising a suction cup (1), characterized in that: One side of the suction cup (1) is fixedly connected to an air jet assembly (2), and one end of the side of the suction cup (1) away from the air jet assembly (2) is rotatably connected to a cleaning assembly (7); The jet assembly (2) comprises a support frame (201), a jet (202), a connecting pipe (203), and an air intake pipe (204); one end of the support frame (201) is fixedly connected to the suction cup (1); the outside of the jet (202) is mounted on the support frame (201); one end of the connecting pipe (203) is fixedly connected to the jet (202); the other end of the connecting pipe (203) is fixedly connected to the air intake pipe (204); and one end of the air intake pipe (204) is fixedly connected to the suction cup (1).
2. A vacuum suction cup processing and cleaning device according to claim 1, characterized in that: The cleaning assembly (7) comprises a handle (701), a threaded rod (702), a cleaning scraper (703), and a sliding rod (704); the outer side of the handle (701) is rotatably connected to the suction cup (1); one end of the threaded rod (702) is fixedly connected to the handle (701); one side of the cleaning scraper (703) is threadedly connected to the threaded rod (702); and the other side of the cleaning scraper (703) is slidably connected to the sliding rod (704).
3. The vacuum suction cup processing and cleaning device according to claim 1, characterized in that: A pipe expansion joint (3) is installed on one side of the suction cup (1); an end of the pipe expansion joint (3) away from the suction cup (1) is fixedly connected to a connector (4); an interface (5) is installed on the side of the suction cup (1) close to the connector (4); and a switch valve (6) is slidably connected to the outer side of the interface (5).
4. The vacuum suction cup processing and cleaning device according to claim 2, characterized in that: The bottom end of the suction cup (1) is fixedly connected to a bottom plate (8), the top end of the bottom plate (8) is fixedly connected to a vacuum channel (9), the bottom end of the cleaning scraper (703) is slidably connected to the top end of the bottom plate (8), and the top end of the cleaning scraper (703) is slidably connected to the vacuum channel (9).
5. The vacuum suction cup processing and cleaning device according to claim 4, characterized in that: The jet (202) of the jet assembly (2) fixedly connected to one side of the suction cup (1) can adjust the jet force and direction so as to adjust the airflow during the cleaning and detection process according to the specific conditions of the cable surface.
6. The vacuum suction cup processing and cleaning device according to claim 4, characterized in that: The cleaning scraper (703) of the cleaning component (7) is made of a wear-resistant material, and the surface of the cleaning scraper (703) is designed with fine textures.
Citation Information
Patent Citations
Vacuum adsorption type sucker
CN219403399U