A quick-release self-locking pressure foot mechanism and use method

Abstract

The present invention discloses a quick-release self-locking pressure foot mechanism and a method of use, including a self-locking rod mechanism, an end effector, and a pressure foot. The self-locking rod mechanism is fixed to the annular structure of the end effector through a threaded through hole. The locking ball inside the locking rod can telescopically move along the normal direction of the inner surface of the annular structure. A locking groove corresponding to the position of the locking ball is provided on the outer surface of one end of the pressure foot. The locking ball and the locking groove are used in conjunction to achieve rapid installation, locking, and removal of the pressure foot. The present invention achieves rapid and accurate installation and removal of the pressure foot on the end effector. The entire installation and removal process is simple and convenient, easy to operate, and the installation process is quickly aligned and one-stop screwed in and locked. The pressure foot is installed in place and has anti-loosening and anti-falling functions during the operation of the equipment. The entire mechanism is easy to use, maintain, and remove and install.

Description

Technical Field

[0001] The present application relates to the field of automatic hole making processing for digital assembly of aircraft, and in particular to a terminal pressure foot bushing mechanism of an automatic hole making device and a use method thereof. Background Art

[0002] In recent years, with the rapid development of automation and digitalization, automatic hole making has been widely used in the assembly manufacturing industry, especially in the fields of aerospace, automobile assembly manufacturing, etc. Automated hole making technology mainly includes flexible rail hole making, robot hole making and machine tool hole making. The core part of automatic hole making equipment is mainly concentrated in the design of the end effector. The end effector integrates many motion units, including pressure foot unit, hole making unit, photogrammetry unit, aperture detection unit, nail feeding unit, etc. The pressure foot unit is installed at the front end of the end effector. When executing the actions of other motion units, the pressure foot will press on the surface of the product to eliminate the pre-connection gap of the product and ensure the accuracy of the hole making and measurement process. In a product, such as the wing panels and wing boxes of aircraft, there are usually many specifications of fasteners for connecting components. Interference occurs between each pre-connected fastener. Therefore, different brands of fasteners usually correspond to one or several pressure feet. When making connection holes for fasteners of different brands, it is necessary to frequently replace the pressure foot on the end effector. At present, the connection between the pressure foot and the end effector mostly adopts screw connection. Multiple screws are distributed around the pressure foot. Each replacement requires the screws to be removed and reinstalled after replacing the new pressure foot. This method has the problem of long disassembly and installation time. At the same time, the installation quality of the screws affects the flushness of the end face of the pressure foot. The flushness of the end face will affect the quality of the product. In addition, repeated disassembly and installation will also have a certain impact on the installation accuracy of the pressure foot, which will eventually be reflected in the processing quality of the product. Therefore, there is an urgent need for a pressure foot mechanism with simple structure, convenient disassembly and installation, and high precision to ensure product quality and safety during the automatic processing of the equipment. Summary of the invention

[0003] To solve the above problems, the present application provides a quick-release self-locking pressure foot mechanism and a method of use. The mechanism is simple to use and easy to disassemble and install. It can realize fast and accurate disassembly and installation of the pressure foot, ensuring product quality and safety during the automatic processing of the equipment.

[0004] The technical solution adopted to achieve the purpose of the present invention is: a quick-release self-locking pressure foot mechanism, including a self-locking rod mechanism, an end actuator, and a pressure foot. The self-locking rod mechanism includes a locking rod, a locking ball, a clamping spring, and a clamping pin. The interior of the locking rod is a cavity structure, and the inner cavity wall at one end is formed with an internal thread, and the outer surface of the rod at the other end is provided with an external thread. One end of the clamping pin is provided with an external thread, and the end surface of the other end is provided with a flat tightening groove. The locking ball and the clamping spring are sequentially installed in the cavity of the locking rod. After the clamping pin presses the clamping spring, it is fixedly connected to the locking rod through threaded cooperation. The outer surface of the annular structure of the end actuator is provided with a threaded groove that cooperates with the external thread of the locking rod. The self-locking rod mechanism is combined into one and is fixed on the annular structure of the end actuator through the threaded through hole. The locking ball can telescope along the normal direction of the inner surface of the annular structure. The pressure foot is a stepped cylindrical structure. A locking groove corresponding to the position of the locking ball is provided on the outer surface of the end with a larger diameter. The locking groove includes an introduction section, a sliding section, and a locking section. Arc transition steps for the locking ball to pass through are provided at the interface between the introduction section and the sliding section, and at the interface between the sliding section and the locking section. The locking ball and the locking groove are used in combination to realize the rapid installation, locking and disassembly of the pressure foot. The end face of the end with a smaller diameter is pressed tightly against the area on the surface of the product to be holed.

[0005] Furthermore, ventilation holes are evenly distributed around the outer surface of the end of the pressure foot with a smaller diameter.

[0006] Furthermore, the number of ventilation holes is 8.

[0007] The method for using the quick-release self-locking pressure foot mechanism comprises the following steps:

[0008] 1Hold the end of the pressure foot with a small diameter, align the locking groove of the pressure foot with the matching locking ball, and push the pressure foot inward along the guide section of the locking groove. When the hand feels a slight vibration, the locking ball has fallen into the sliding section along the arc steps of the guide section and the sliding section under the action of the compression spring. At this time, turn the pressure foot counterclockwise. When it cannot be turned, it indicates that the locking ball has reached the intersection of the arc steps of the sliding section and the locking section. At this time, continue to push the pressure foot inward. When the hand feels a slight vibration, it indicates that the locking ball has fallen into the locking section under the action of the compression spring and contacts the inner surface of the locking section. At this point, the pressure foot is installed and the equipment can be used for hole making.

[0009] 2. Hold the end with the smaller diameter of the pressure foot and pull the pressure foot outward. When it cannot be pulled any further, it indicates that the locking ball has entered the sliding section along the arc steps of the sliding section and the locking section. At this time, turn the pressure foot clockwise until it cannot be turned any further, indicating that the locking ball has reached the intersection of the arc steps of the sliding section and the introduction section. Continue to pull the pressure foot outward to separate the pressure foot from the end effector. At this point, the pressure foot is completely disassembled.

[0010] The advantage of this patent is that it can realize the rapid and accurate installation and removal of the pressure foot on the end effector. The whole installation and removal process is simple, convenient and easy to operate. The pressure foot realizes rapid alignment during the installation process and one-stop screw-in locking. At the same time, the arc step-type design at the interface between the introduction section and the sliding section, and at the interface between the sliding section and the locking section realizes the pressure foot installation prompt and the anti-loosening and anti-falling functions during the operation of the equipment. The whole mechanism is easy to use, maintain, disassemble and install. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 Overall installation view of the pressure foot mechanism

[0012] Figure 2 Overall structural view of the pressure foot mechanism

[0013] Figure 3 Overall structural view of the self-locking rod mechanism

[0014] Figure 4 Exploded view of self-locking lever mechanism

[0015] Figure 5 Pressure foot structure view

[0016] Explanation of the numbers in the figure: 1-self-locking rod mechanism, 2-end effector, 3-pressure foot, 4-slotted tightening groove, 5-locking ball, 6-locking rod, 7-compression spring, 8-compression pin, 9-introduction section, 10-sliding section, 11-locking section DETAILED DESCRIPTION

[0017] See attached Figure 1-5A quick-release self-locking pressure foot mechanism comprises a self-locking rod mechanism 1, an end effector 2, and a pressure foot 3. The self-locking rod mechanism comprises a locking rod 6, a locking ball 5, a clamping spring 7, and a clamping pin 8. The interior of the locking rod 6 is a cavity structure, and an inner cavity wall at one end is provided with an internal thread, and an outer surface of the rod at the other end is provided with an external thread. One end of the clamping pin 8 is provided with an external thread, and a flat tightening groove 4 is provided on the end surface of the other end. The locking ball 5 and the clamping spring 7 are sequentially installed in the cavity of the locking rod 6. After the clamping pin 8 presses the clamping spring 7, it is fixedly connected with the locking rod 6 through a threaded fit. A threaded through hole matching the external thread of the locking rod 6 is provided on the outer surface of the annular structure of the end effector 2. Combination The integrated self-locking rod mechanism 1 is fixed on the annular structure of the end actuator 2 through a threaded through hole. The locking ball 5 can telescope along the normal direction of the inner surface of the annular structure. The pressure foot 3 is a stepped cylindrical structure. A locking groove corresponding to the position of the locking ball 5 is provided on the outer surface of the end with a larger diameter. The locking groove includes an introduction section 9, a sliding section 10, and a locking section 11. Arc transition steps for the locking ball 5 to pass through are provided at the interface between the introduction section 9 and the sliding section 10, and at the interface between the sliding section 10 and the locking section 11. The locking ball 5 is used in conjunction with the locking groove to achieve rapid installation, locking and disassembly of the pressure foot 3. The end face of the end with a smaller diameter is pressed against the area on the surface of the product to be holed.

[0018] Ventilation holes can also be evenly distributed around the outer surface of the end with a smaller diameter of the pressure foot 3. In this embodiment, the number of ventilating holes is 68.

[0019] The method for using the quick-release self-locking pressure foot mechanism comprises the following steps:

[0020] 1Hold the end of the pressure foot 3 with a smaller diameter, align the locking groove of the pressure foot 3 with the locking ball 5 matched therewith, and push the pressure foot 3 inward along the direction of the introduction section 9 of the locking groove by hand. When the hand feels a slight vibration, the locking ball 5 has fallen into the sliding section 10 along the arc step of the introduction section 9 and the sliding section 10 under the action of the pressing spring 7. At this time, turn the pressure foot 3 counterclockwise until it cannot be turned, indicating that the locking ball 5 has reached the intersection of the arc step of the sliding section 10 and the locking section 11. At this time, continue to push the pressure foot 3 inward. When the hand feels a slight vibration, it indicates that the locking ball 5 has fallen into the locking section 11 under the action of the pressing spring 7 and contacts the inner surface of the locking section 11. At this point, the pressure foot 3 is installed and the equipment hole making operation can be carried out;

[0021] 2 Hold the end of the pressure foot with a smaller diameter and pull the pressure foot 3 outward. When it cannot be pulled any further, it indicates that the locking ball 5 has entered the sliding section 10 along the arc steps of the sliding section 10 and the locking section 11. At this time, turn the pressure foot 3 clockwise until it cannot be turned any further, indicating that the locking ball 5 has reached the intersection of the arc steps of the sliding section 10 and the introduction section 9. Continue to pull the pressure foot 3 outward to separate the pressure foot 3 from the end effector 2. At this point, the pressure foot 3 is completely disassembled.

Claims

1. A quick-release self-locking pressure foot mechanism, characterized in that The invention comprises a self-locking rod mechanism, an end effector and a pressure foot. The self-locking rod mechanism comprises a locking rod, a locking ball, a clamping spring and a clamping pin. The interior of the locking rod is a cavity structure. An inner cavity wall at one end is provided with an inner thread, and an outer surface of the rod at the other end is provided with an outer thread. One end of the clamping pin is provided with an outer thread, and an end surface of the other end is provided with a flat tightening groove. The locking ball and the clamping spring are sequentially installed in the cavity of the locking rod. After the clamping pin presses the clamping spring, it is fixedly connected with the locking rod through threaded cooperation. A threaded through hole matching with the outer thread of the locking rod is provided on the outer surface of the annular structure of the end effector. The combination The self-locking rod mechanism is fixed on the annular structure of the end actuator through a threaded through hole. The locking ball can telescope along the normal direction of the inner surface of the annular structure. The pressure foot is a stepped cylindrical structure. The outer surface of the end with a larger diameter is provided with a locking groove corresponding to the position of the locking ball. The locking groove includes an introduction section, a sliding section, and a locking section. The interface between the introduction section and the sliding section, and the interface between the sliding section and the locking section are both provided with arc transition steps for the locking ball to pass through. The locking ball and the locking groove are used in conjunction to realize the rapid installation, locking and removal of the pressure foot. The end face of the end with a smaller diameter is aligned with the product. Press the surface area to be holed tightly, hold the end of the pressure foot with a small diameter, align the locking groove of the pressure foot with the matching locking ball, and push the pressure foot inward along the guide section of the locking groove. When the hand feels a slight vibration, the locking ball has fallen into the sliding section along the arc step of the guide section and the sliding section under the action of the compression spring. At this time, turn the pressure foot counterclockwise. When it cannot be turned, it indicates that the locking ball has reached the intersection of the arc step of the sliding section and the locking section. At this time, continue to push the pressure foot inward. When the hand feels a slight vibration, it indicates that the locking ball is locked. The ball has fallen into the locking section under the action of the compression spring and is in contact with the inner surface of the locking section. Now the pressure foot has been installed and the equipment can be used for hole making. Hold the end of the pressure foot with a smaller diameter and pull the pressure foot outward. When it cannot be pulled further, it indicates that the locking ball has entered the sliding section along the circular arc steps of the sliding section and the locking section. At this time, turn the pressure foot clockwise until it cannot be turned further, indicating that the locking ball has reached the intersection of the circular arc steps of the sliding section and the introduction section. Continue to pull the pressure foot outward to separate the pressure foot from the end effector. Now the pressure foot is disassembled.

2. A quick-release self-locking pressure foot mechanism according to claim 1, characterized in that The outer surface of the end of the pressure foot with a smaller diameter is evenly distributed with ventilation holes around the periphery.

3. A quick-release self-locking pressure foot mechanism according to claim 2, characterized in that There are 8 vents.

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