Hydraulic loading mechanism for riveting end of piston stud nut

Abstract

The application provides a combined piston stud nut end riveting hydraulic loading mechanism, which comprises a rack, a workbench arranged on the rack and provided with an operation platform for loading the combined piston by hydraulic pressure, a workpiece clamping component arranged on the operation platform and capable of rotating and translocating the combined piston arranged thereon and fixing the position of the combined piston, and a hydraulic drive component arranged on the rack, wherein the drive end of the hydraulic drive component is connected with a riveting mechanism arranged above the combined piston. The combined piston stud nut end riveting hydraulic loading mechanism can rivet and load the stud nut of the combined piston, make the nut end light hole structure and the stud square form fit and form, and complete the fastening and anti-loosening manufacturing process of the piston assembly.

Description

Technical Field

[0001] This application belongs to the field of mechanical assembly, and in particular relates to a hydraulic loading mechanism for riveting the ends of a combined piston stud nut. Background Technology

[0002] Driven by the development trend of internal combustion engines demanding high power density, high explosion pressure, and high speed, piston components have gradually shifted from single-material structures to multi-material composite structures, such as steel-top aluminum multi-pistons. These composites offer significantly improved structural strength and resistance to thermal fatigue. The combination of two-material piston components typically employs friction welding, threaded connections, or stud-nut fastening. The connection method and reliability between components directly affect the magnitude of the reciprocating inertial force generated by the piston's high-speed motion during operation, its resistance to explosion pressure and thermal shock, and the assurance of cylinder liner wear and sealing performance due to deformation. Therefore, the selection of connection methods and the tightening process between the components of a composite piston are crucial.

[0003] Currently, methods such as applying glue, using irregularly shaped washers for locking, and interlocking steel wires are used to prevent nuts from loosening. For stud and nut connection and fastening, a four-way riveting process is used. Existing riveting devices cannot simultaneously meet the production needs of clamping the piston once and riveting multiple nuts in sequence. Summary of the Invention

[0004] In view of this, this application aims to propose a hydraulic loading mechanism for riveting the ends of combined piston stud nuts, in order to solve the problem that existing riveting devices cannot simultaneously meet the production requirements of clamping the piston once and riveting multiple nuts in sequence when using a four-sided riveting process to fasten stud nuts.

[0005] To achieve the above objectives, the technical solution of this application is implemented as follows: This application provides a hydraulic loading mechanism for riveting the end of a combined piston stud nut, comprising: frame; A workbench is mounted on the frame and has an operating platform on it for hydraulically loading the combined piston. A workpiece clamping component is detachably mounted on the operating platform, and the workpiece clamping component can rotate and reposition the combined piston mounted on it, and fix the position of the combined piston. A hydraulic drive component is mounted on the frame, and the drive end of the hydraulic drive component is connected to a riveting mechanism located above the combined piston. In response to driving the hydraulic drive component, the stud nut of the combined piston is riveted and loaded by the riveting mechanism so that the smooth hole structure at the end of the nut fits into the square shape of the stud.

[0006] Furthermore, a partition is provided on the bottom plate of the frame to divide the frame into a component working area and a hydraulic loading operation area; The hydraulic actuation parts of the worktable, the workpiece clamping component, and the hydraulic drive component are located in the component working area, and the hydraulic supply part of the hydraulic drive component is located in the hydraulic loading operation area.

[0007] Furthermore, the workpiece clamping component includes a support base, a lifting tray, and a lifting platform; The workbench has a positioning countersunk hole in the center of its surface, and the bottom of the support base has a positioning protrusion that mates with the positioning countersunk hole. The support base is fixed to the workbench by fasteners. The top of the support base extends upward with a protruding stud, and the lifting tray is threadedly connected to the protruding stud. The height of the lifting tray can be adjusted along the protruding stud. The lifting platform is mounted on the lifting tray and is rotatable relative to the lifting tray. The lifting platform and the lifting tray are secured to the protruding stud by a limiting member to prevent the lifting tray from rotating out. The combined piston is placed on the lifting platform and its position is locked by a locking element provided on the lifting platform.

[0008] Furthermore, the lifting tray has a disc-shaped structure, with a threaded countersunk hole at the bottom center that engages with the threaded protrusion stud, and the height of the lifting tray can be adjusted by rotating an adjustment handle horizontally inserted at its lower part. The upper surface of the lifting tray is provided with a connecting countersunk hole, and an annular lubricating oil groove is formed around the connecting countersunk hole to form a double-ring plane. The lifting platform is fitted on the lifting tray.

[0009] Furthermore, the bottom side wall of the lifting tray is provided with fastening screw holes, and the lifting tray is locked by passing a locking screw through the fastening screw holes.

[0010] Furthermore, the lifting platform has a bowl-shaped structure with a circular countersunk hole at the top for placing the combined piston; The lifting platform has a stepped through hole in the middle. The stud of the limiting member passes through the stepped through hole and through the lifting tray and is screwed into the protruding stud.

[0011] Furthermore, the lifting platform has several irregularly shaped through holes evenly distributed around its perimeter to form a flat handrail, which is used to move the lifting platform so that it can rotate freely within the connecting countersunk hole of the lifting tray.

[0012] Furthermore, multiple horizontal screw holes are provided circumferentially on the inner wall of the circular countersunk hole; The stud portion of the locking member engages with the horizontal screw hole and moves radially, with a flexible washer provided at the end of the stud portion; The handle of the locking part has a petal structure.

[0013] Furthermore, a support plate is horizontally fixed on the partition plate, the hydraulic actuation part is disposed on the support plate and passes through the support plate to be connected to the riveting mechanism, and the hydraulic supply part is connected to the hydraulic actuation part to provide hydraulic supply to the hydraulic actuation part.

[0014] Furthermore, the hydraulic actuation part includes a hydraulic cylinder, an actuating piston, and a guide plate; A support plate is horizontally fixed on the partition plate. The hydraulic cylinder body is detachably mounted on the support plate. The actuating piston is installed into the hydraulic cylinder body through the guide plate and sealed by a rubber ring to form a high-pressure oil chamber. A return spring is provided between the actuating piston and the guide plate. The guide disc is bolted to the hydraulic cylinder body and extends through a through hole in the support plate. The guide rod portion of the actuating piston passes through the middle guide hole of the guide disc and is connected to the connecting flange of the riveting mechanism. The top of the hydraulic cylinder is provided with an oil inlet hole, which is connected to the hydraulic supply part through a connecting oil circuit.

[0015] Compared with the prior art, the hydraulic loading mechanism for riveting the end of the combined piston stud nut described in this application has the following advantages: The hydraulic loading mechanism for riveting the stud nut end of the combined piston described in this application clamps and fixes the combined piston through a workpiece clamping component, controls the movement of the hydraulic drive component, and uses a riveting mechanism to load the stud nut of the combined piston, so that the smooth hole structure at the end of the nut fits into the square shape of the stud. This loading mechanism can clamp pistons of different diameters, greatly satisfying the riveting application of different piston connecting bolts, and meeting the manufacturing requirements of one-time piston clamping, sequential riveting of multiple nuts, stable loading, and efficient operation; at the same time, it can meet the assembly line work mode such as multiple nut forming, and complete the fastening and anti-loosening manufacturing process of the piston assembly. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a cross-sectional view of the hydraulic loading mechanism for riveting the ends of the combined piston stud nut as described in the embodiments of this application; Figure 2 This is a top view of the lifting platform described in the embodiments of this application; Figure 3 This is a cross-sectional view of the riveting mechanism described in the embodiments of this application.

[0017] Explanation of reference numerals in the attached figures: 1-Hydraulic cylinder body; 2-Actuating piston; 3-Return spring; 4-Guide plate; 5-Riveting mechanism; 6-Lifting platform; 7-Locking component; 8-Limiting component; 9-Lifting pallet; 10-Adjusting handle; 11-Support base; 12-Workbench; 13-Hand-operated hydraulic pump; 14-High-pressure oil pipe; 15-Frame; 16-Combined piston; 17-Outer shell body; 18-Elastic buckle; 19-Adjusting lever; 20-Guide screw block; 21-Return spring; 22-Blind hole nut; 23-Pressure flange; 24-Fasting bolt; 25-Riveting nut. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0019] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in the embodiments of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0020] Please see Figure 1 and Figure 2 As shown, this embodiment provides a hydraulic loading mechanism for riveting the end of a combined piston 16 stud nut, comprising: Rack 15; The worktable 12 is mounted on the frame 15 and is equipped with an operating platform that can hydraulically load the combined piston 16. The workpiece clamping component is detachably mounted on the operating platform, and the workpiece clamping component can rotate and reposition the combined piston 16 mounted on it, and fix the position of the combined piston 16. A hydraulic drive component is mounted on the frame 15. The drive end of the hydraulic drive component is connected to the riveting mechanism 5, which is located above the combined piston 16. In response to the driving hydraulic drive component, the stud nut of the combined piston 16 is riveted and loaded by the riveting mechanism 5 so that the smooth hole structure at the end of the nut fits into the square shape of the stud.

[0021] The facility has a reasonable overall layout, compact structure, and is integrated into a single unit; it is easy to move and quick to set up, occupies a small area, and has relaxed requirements for basic conditions; it requires no electricity, making it energy-saving and environmentally friendly; it produces no noise or harmful gas pollution, and provides a good working environment.

[0022] The hydraulic loading mechanism for riveting the stud nut end of the combined piston 16 described in this embodiment clamps and fixes the combined piston 16 through a workpiece clamping component, controls the movement of the hydraulic drive component, and uses the riveting mechanism 5 to rivet the stud nut of the combined piston 16, so that the smooth hole structure at the end of the nut fits into the square shape of the stud. This loading mechanism can clamp pistons of different diameters, greatly satisfying the riveting application of different piston connecting bolts, and meeting the manufacturing requirements of one-time piston clamping, sequential riveting of multiple nuts, stable loading, and efficient operation; at the same time, it can meet the assembly line work mode such as multiple nut forming, and complete the fastening and anti-loosening manufacturing process of the piston assembly.

[0023] In some embodiments, a partition is provided on the base plate of the frame 15 to divide the frame 15 into a component working area and a hydraulic loading operation area; The hydraulic actuation parts of the worktable 12, workpiece clamping components, and hydraulic drive components are located in the component working area, while the hydraulic supply part of the hydraulic drive components is located in the hydraulic loading operation area.

[0024] Specifically, in this embodiment, the frame 15 is used as the framework. The structure of the frame 15 is divided into two functional areas, left and right. The left side is the component working area and the right side is the loading operation area. The lower bottom plate, the upright plate, and the upper high plate of the component working area of ​​the frame 15 are welded to each other at right angles and reinforced by side stiffeners to form a specific functional area. The lower base plate of the frame 15 has foundation connection holes and fixed threaded holes for the worktable 12. The worktable 12 is fixed with bolts using bolt holes on the lower base plate of the frame 15. Its position can be adjusted according to the mounting holes of the high-level plate on the upper part of the frame 15 and the position requirements of the entire actuator.

[0025] In some embodiments, the workpiece clamping components include a support base, a lifting tray 9, and a lifting platform 6; A positioning countersunk hole is provided in the center of the workbench 12, and a positioning protrusion that mates with the positioning countersunk hole is provided at the bottom of the support base. The support base is fixed to the workbench 12 by fasteners. The top of the support base extends upward with a protruding stud, and the lifting tray 9 is threadedly connected to the protruding stud. The height of the lifting tray 9 can be adjusted up and down along the protruding stud. The lifting platform 6 is mounted on the lifting tray 9 and can rotate relative to the lifting tray 9. The lifting platform 6 and the lifting tray 9 are mounted on a protruding stud by a limiting member 8, which is used to prevent the lifting tray 9 from unscrewing. The combined piston 16 is placed on the lifting platform 6 and its position is locked by the locking element 7 provided on the lifting platform 6.

[0026] Specifically, in this embodiment, a positioning countersunk hole is formed in the middle of the workbench 12 for supporting the center positioning of the machine base 11. A through hole is formed in the workbench 12, which is opposite to the bolt hole of the machine base 11, and bolts are used to tighten it from below. The support base has a disc structure, and a stud protrudes in the middle of the machine base 11. Its diameter and pitch are relatively large to ensure the stability of the mechanism under force and quick height adjustment.

[0027] The mechanism features a dedicated 12-inch workbench with an upper-mounted rotating design, a hollow turntable handle, and quick and accurate positioning of the 25mm riveting nut. It also boasts a lifting function with handle operation, allowing for convenient piston position and height adjustment. Furthermore, the piston locking device extends and retracts freely to accommodate pistons of different diameters, greatly satisfying the riveting applications of various piston connection bolts. It is highly versatile, has a wide range of applications, and high utilization.

[0028] In some embodiments, the lifting tray 9 has a disc-shaped structure with a threaded countersunk hole at the bottom center that engages with the threaded protrusion stud. The height of the lifting tray 9 can be adjusted by rotating the horizontally inserted adjustment handle 10 at its lower part. The upper surface of the lifting tray 9 is provided with a connecting countersunk hole, and an annular lubricating oil groove is formed around the connecting countersunk hole to form a double-ring plane. The lifting platform 6 is fitted on the lifting tray 9. The bottom side wall of the lifting tray 9 is provided with fastening screw holes. The lifting tray 9 is locked by passing a locking screw through the fastening screw holes.

[0029] Specifically, in this embodiment, the lifting tray 9 has a butterfly-shaped overall structure. A downward-facing threaded countersunk hole at the bottom center engages with the studs of the support base 11. The height of the lifting tray 9 can be adjusted by rotating the horizontally inserted adjusting handle 10 at its lower part. Other threaded holes on the lifting tray 9 can be selected and secured with locking screws to complete the height adjustment. A lifting platform 6 is provided on the upper part of the lifting tray 9, and an annular lubrication groove is formed, creating a double-ring plane. A countersunk hole for positioning and rotation is provided in the middle of the lifting tray 9, which forms a shaft-hole-like fit with the lifting platform 6.

[0030] In some embodiments, the lifting platform 6 has a bowl-shaped structure with a circular countersunk hole at the top for placing the combined piston 16. The lifting platform 6 has a stepped through hole in the middle. The stud of the limiting member 8 passes through the stepped through hole and through the lifting tray 9 and is screwed into the protruding stud. like Figure 2 As shown, the lifting platform 6 has several irregularly shaped through holes evenly distributed around its perimeter to form a flat handrail, which is used to move the lifting platform 6 so that it can rotate freely in the connecting countersunk hole of the lifting tray 9. Multiple horizontal screw holes are provided circumferentially on the inner wall of the circular countersunk hole.

[0031] Specifically, in this embodiment, the lifting platform 6 has an overall bowl-shaped structure. The upper circular countersunk hole is used to place the combined piston 16, and the combined piston 16 is fixed by locking devices in four directions. The lifting platform 6 has flat handrails with irregular through holes evenly distributed around its perimeter, which are used to move the lifting platform 6 so that it can rotate freely in the countersunk hole of the lifting tray 9, which facilitates the adjustment and conversion of the position of the riveting nut 25.

[0032] A stepped through hole is provided in the middle of the lifting platform 6 for the installation of the limiting component 8. One end of the stud of the limiting component 8 is screwed into the disc base, and the other end is used for height restriction.

[0033] In some embodiments, the stud portion of the locking member 7 engages with the horizontal screw hole and moves radially, and the end of the stud portion is provided with a flexible washer; The handle part of the locking part 7 has a petal structure.

[0034] Specifically, in this embodiment, one end of the locking member 7 has a petal structure for easy manual gripping, and a polytetrafluoroethylene cylindrical block is placed in the middle countersunk hole of the other end to directly press against the piston to avoid damaging the parts; the stud structure at one end of the locking member 7 cooperates with the horizontal screw hole of the lifting platform 6 to expand and contract radially, generating a clamping force.

[0035] In some embodiments, a support plate is horizontally fixed on the partition, a hydraulic actuation part is mounted on the support plate and passes through the support plate to be connected to the riveting mechanism 5, and a hydraulic supply part is connected to the hydraulic actuation part to provide hydraulic supply to the hydraulic actuation part.

[0036] The hydraulic actuation part includes a hydraulic cylinder body 1, an actuating piston 2, and a guide plate 4; A support plate is horizontally fixed on the partition plate. The hydraulic cylinder body 1 is detachably mounted on the support plate. The actuating piston 2 is installed in the hydraulic cylinder body 1 through the guide plate 4 and sealed by a rubber ring to form a high-pressure oil chamber. A return spring 3 is provided between the actuating piston 2 and the guide plate 4. The guide plate 4 is bolted to the hydraulic cylinder body 1 and passes through the through hole opened on the support plate. The guide rod part of the actuating piston 2 passes through the middle guide hole of the guide plate 4 and is connected to the connecting flange of the riveting mechanism 5. The top of the hydraulic cylinder body 1 is provided with an oil inlet hole, which is connected to the hydraulic supply part through a connecting oil circuit.

[0037] Specifically, in this embodiment, a through hole for mounting the hydraulic cylinder 1 and guide plate 4 is provided on the upper high-level plate of the frame 15. Threaded holes are distributed around the through hole to allow the hydraulic cylinder 1 to be bolted onto the upper high-level platform surface of the frame 15. The guide plate 4 is bolted to the hydraulic cylinder 1 and protrudes downwards from the high-level platform of the frame 15. The actuating piston 2 is installed inside the hydraulic cylinder 1 and sealed with a rubber ring to form a high-pressure oil chamber. A return spring 3 is provided at the lower part of the actuating piston 2 to facilitate automatic upward return of the actuating piston 2 when the pressure in the high-pressure oil chamber decreases. The guide rod of the actuating piston 2 passes through the guide hole in the middle of the guide plate 4 and connects to the connecting flange of the riveting mechanism 5. The small clearance between the actuating piston 2 and the guide plate 4 ensures the stability of the actuating piston 2's upward and downward sliding movement. The riveting mechanism 5 performs riveting operations and position adjustments on the rivet nuts during the upward and downward sliding movement of the actuating piston 2.

[0038] An oil inlet is provided at the top of the hydraulic cylinder body 1, and it is connected to the hand-operated hydraulic pump 13 through a connecting joint and a high-pressure oil pipe 14. The hand-operated hydraulic pump 13 is arranged in the loading operation area on the right side of the frame 15, forming a reasonable allocation between loading operation and riveting operation.

[0039] The mechanism adopts an integrated frame 15, with integrated components forming a self-contained system; a hand pump pressurizes the system, with real-time pressure display and flexible operation; the hydraulic cylinder is matched with the actuating piston 2, ensuring stable pressure and smooth operation; the return spring 3 provides strong rebound, and the actuating piston 2 returns to its original position promptly; the universal flange connection and riveting mechanism 5 facilitate replacement and adjustment.

[0040] In this embodiment, as Figure 1 and Figure 3 As shown, the riveting mechanism 5 includes: The outer casing 17, the elastic clamping component, the guide component, the adjusting lever 19, and the pressure flange 23; The outer shell body 17 has an internal stepped hole structure. The elastic pressing component and the guide component are respectively set in the stepped hole. The elastic pressing component can move along the stepped hole, and the guide component is used to guide the movement of the elastic pressing component. The pressure flange 23 is detachably installed at one end of the housing body 17, and a cavity is formed between the pressure flange 23 and the housing body 17 to reserve space for the movement of the elastic clamping component. The pressure flange 23 is connected to the pressure equipment. The end of the elastic clamping member away from the pressure flange 23 is a multi-lobed split structure, and its end forms an inner countersunk hole. The elastic clamping member is operated by the adjustment lever 19 set on the housing body 17 so that the inner countersunk hole locks the port of the rivet nut 25. In response to the downward pressure of the pressure device, the outer casing 17 moves downward, the inner countersunk hole contracts, and the port of the rivet nut 25 fits into place with the end of the stud.

[0041] In some embodiments, the end of the stepped bore furthest from the pressure flange 23 is a tapered bore; The elastic clamping component includes an elastic buckle 18, a return spring 21, and a blind hole nut 22. The elastic buckle 18 is hollow inside and has gaps arranged at intervals to form a multi-lobed split structure. The outer wall surface of each lobe of the elastic buckle 18 is a conical surface and fits with the conical hole surface opened on the outer shell body 17. The end of each lobe of the elastic buckle 18 extends outward with a protrusion, and the multiple protrusions surround to form an inner recessed hole. The end of the elastic buckle 18 near the pressure flange 23 is threaded with a blind hole nut 22. The blind hole nut 22 is located in the cavity, and a return spring 21 is provided between the outer extension of the blind hole nut 22 and the guide member.

[0042] The lower end of the elastic buckle 18 is a conical structure with a square countersunk hole at the protruding part of its head. The conical structure is divided into four equal parts, each retaining part of the conical surface and one side of the square hole. Each part is uniformly connected to the protruding structure at the other end of the elastic buckle 18 through the thin-walled hollow tube wall in the middle of the elastic buckle 18. The four conical structures can be combined to form a complete conical structure, and the square countersunk holes at the ends can also be combined to form a structure. The conical surface of the elastic buckle 18 fits against the conical hole surface of the outer shell body 17.

[0043] The other side of the elastic snap fastener 18 is fitted with the guide screw block 20 with a clearance to ensure stable up-and-down movement of the elastic snap fastener 18 during operation; the upper end of the elastic snap fastener 18 is provided with a threaded structure to cooperate with the blind hole nut 22, and the return spring 21 ensures that the conical surface of the elastic snap fastener 18 is stably attached during non-operation; an adjustment lever 19 is installed at the protrusion in the middle of the elastic snap fastener 18, and the operator can use the adjustment lever 19 to push the elastic snap fastener 18 down to open the square countersunk hole, which facilitates the square countersunk hole to hold the riveting nut 25, preparing for the subsequent nut riveting work.

[0044] It should be noted that the elastic snap fastener 18 is connected to the shaft hole surface of the housing body 17 and the guide screw block 20, and requires lubricating oil for lubrication.

[0045] Specifically, the outer shell body 17 has an internal stepped hole structure; on the outer wall of the outer shell body 17, a window is opened at the middle protrusion corresponding to the elastic buckle 18 for inserting the adjustment lever 19; a flange connection interface is provided on the upper part of the outer shell body 17, which is connected to the pressure flange 23 by fastening bolts 24. The pressure flange 23 has a countersunk hole structure, with through holes distributed around the bottom for connecting pressure equipment, and threaded holes distributed around the end for connecting to the outer shell body 17; the combination of the outer shell body 17 and the pressure flange 23 forms an inner cavity structure, the height of which meets the space requirements for the movement of the elastic buckle 18; the guide screw block 20 has a threaded structure on the outside for connecting to the outer shell body 17, with a guide hole in the middle and a hexagonal countersunk hole installed on the top. The hexagonal countersunk hole is connected to the external pressure equipment by connecting bolts. The bottom of the guide screw block 20 has a flat structure for positioning and limiting the return spring 3. The corresponding combination of each component realizes a nut port riveting forming tool with riveting function.

[0046] The working principle of the riveting mechanism 5 is as follows: The square riveting forming device for the nut end features pressure application, a smooth process, standardized rivet shape, and convenient operation. Its working principle is as follows: The device is installed on a pressure device. The adjusting lever 19 is used to push the elastic buckle 18 downwards, opening its square countersunk hole to hold the thin-walled end of the riveting nut 25. The pressure device is then activated, pushing the outer casing 17 downwards. Under pressure, the square countersunk hole on the conical assembly of the elastic buckle 18 contracts, gradually pressurizing the cylindrical opening of the nut 25 until its inner hole tightly fits the stud end, and is standardized under the compression of the rounded corners at the bottom of the square countersunk hole.

[0047] During disassembly, the load on the equipment is removed, the contact force of the square countersunk hole is relaxed, the adjustment lever 19 is pulled up to lift the elastic buckle 18, and under the action of the return spring 21, the elastic buckle 18 automatically returns to the original position of the outer shell body 17, and the nut port riveting work is successfully completed.

[0048] The device has a compact and convenient overall structure. The pressure flange 23 design is suitable for connection to various electric or hydraulic presses. It is easy to install, mobile and flexible, portable for various field applications, and has low labor intensity.

[0049] The working principle of this loading mechanism: The hydraulic loading mechanism for riveting the end of the stud nut of the combined piston 16 is a complete riveting operation machine. It is manually operated by a hydraulic pump, utilizing the pressure accumulated in the high-pressure chamber to form a stable downward vertical load required for nut riveting. The axial force is converted into a radial riveting force through the internal conical holes and split conical snap-fit ​​structure of the riveting mechanism 5, causing the smooth hole structure at the nut end to compress synchronously in all directions until it fits snugly against the square shape of the stud. The hydraulic loading mechanism for riveting the end of the stud nut of the combined piston 16 is equipped with a hydraulic pump, worktable 12, workpiece clamping components, hydraulic drive components, and riveting mechanism 5, effectively achieving streamlined operation, standardized form, and reliable operation for riveting multiple nuts on the same combined piston 16.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

[0051] The embodiments of this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of this application.

Claims

1. A hydraulic loading mechanism for riveting the ends of a combined piston stud nut, characterized in that, include: Rack (15); A workbench (12) is provided on the frame (15) and an operating platform is provided thereon for hydraulically loading the combined piston (16); The workpiece clamping component is detachably mounted on the operating platform, and the workpiece clamping component can rotate and reposition the combined piston (16) mounted on it, and fix the position of the combined piston (16); A hydraulic drive component is mounted on the frame (15), and the drive end of the hydraulic drive component is connected to the riveting mechanism (5), which is located above the combined piston (16). The riveting mechanism (5) includes: The outer casing (17), elastic clamping component, guide component, adjusting lever (19), and pressure flange (23); The outer shell body (17) is an internally penetrating stepped hole structure. The elastic pressing component and the guide component are respectively set in the stepped hole. The elastic pressing component can move along the stepped hole, and the guide component is used to guide the movement of the elastic pressing component. The pressure flange (23) is detachably installed at one end of the housing body (17). A cavity is formed between the pressure flange (23) and the housing body (17) to reserve space for the movement of the elastic clamping component. The pressure flange (23) is connected to the drive end of the hydraulic drive component. The end of the elastic clamping member away from the pressure flange (23) is a multi-lobed split structure, and its end forms an inner countersunk hole. The elastic clamping member is operated by the adjustment lever (19) set on the outer shell body (17) so that the inner countersunk hole locks the port of the riveting nut (25). In response to driving the hydraulic drive component, the stud nut of the combined piston (16) is riveted and loaded by the riveting mechanism (5) so that the light hole structure at the end of the nut fits into the square shape of the stud.

2. The hydraulic loading mechanism for riveting the end of the combined piston stud nut according to claim 1, characterized in that: A partition is provided on the bottom plate of the frame (15) to divide the frame (15) into a component working area and a hydraulic loading operation area; The worktable (12), the workpiece clamping component, and the hydraulic actuation part of the hydraulic drive component are located in the component working area, and the hydraulic supply part of the hydraulic drive component is located in the hydraulic loading operation area.

3. The hydraulic loading mechanism for riveting the ends of the combined piston stud nut according to claim 2, characterized in that: The workpiece clamping components include a support base, a lifting tray (9), and a lifting platform (6); The workbench (12) has a positioning countersunk hole in the center of its surface, and the bottom of the support base has a positioning protrusion that matches the positioning countersunk hole. The support base is fixed to the workbench (12) by fasteners. The top of the support base extends upward with a protruding stud, and the lifting tray (9) is threadedly connected to the protruding stud. The height of the lifting tray (9) can be adjusted up and down along the protruding stud. The lifting platform (6) is mounted on the lifting tray (9), and the lifting platform (6) is rotatable relative to the lifting tray (9). The lifting platform (6) and the lifting tray (9) are mounted on the protruding stud by a limiting member (8), which is used to prevent the lifting tray (9) from rotating out. The combined piston (16) is placed on the lifting platform (6) and its position is locked by the locking member (7) provided on the lifting platform (6).

4. The hydraulic loading mechanism for riveting the ends of the combined piston stud nut according to claim 3, characterized in that: The lifting tray (9) has a disc-shaped structure, with a threaded countersunk hole at the bottom center that engages with the threaded protrusion stud. The height of the lifting tray (9) can be adjusted by rotating the horizontally inserted adjustment handle (10) at its lower part. The upper end face of the lifting tray (9) is provided with a connecting countersunk hole, and an annular lubricating oil groove is formed around the connecting countersunk hole to form a double-ring plane. The lifting platform (6) is fitted on the lifting tray (9).

5. The hydraulic loading mechanism for riveting the end of the combined piston stud nut according to claim 4, characterized in that: The bottom side wall of the lifting tray (9) is provided with a fastening screw hole, and the lifting tray (9) is locked by passing a locking screw through the fastening screw hole.

6. The hydraulic loading mechanism for riveting the end of the combined piston stud nut according to claim 4, characterized in that: The lifting platform (6) has a bowl-shaped structure and a circular countersunk hole is reserved on its upper part for placing the combined piston (16); The lifting platform (6) has a stepped through hole in the middle. The stud of the limiting member (8) passes through the stepped through hole and through the lifting tray (9) and is screwed into the protruding stud.

7. The hydraulic loading mechanism for riveting the end of the combined piston stud nut according to claim 6, characterized in that: The lifting platform (6) has several irregularly shaped through holes evenly distributed around its perimeter to form a flat handrail, which is used to move the lifting platform (6) so that it can rotate freely in the connecting countersunk hole of the lifting tray (9).

8. The hydraulic loading mechanism for riveting the end of the combined piston stud nut according to claim 6, characterized in that: Multiple horizontal screw holes are provided circumferentially on the inner wall of the circular countersunk hole; The stud portion of the locking member (7) is engaged with the horizontal screw hole and moves radially, and a flexible washer is provided at the end of the stud portion; The handle part of the locking part (7) has a petal structure.

9. The hydraulic loading mechanism for riveting the end of the combined piston stud nut according to claim 2, characterized in that: A support plate is horizontally fixed on the partition plate. The hydraulic actuation part is disposed on the support plate and passes through the support plate to be connected to the riveting mechanism (5). The hydraulic supply part is connected to the hydraulic actuation part to provide hydraulic supply to the hydraulic actuation part.

10. The hydraulic loading mechanism for riveting the end of the combined piston stud nut according to claim 9, characterized in that: The hydraulic actuation part includes a hydraulic cylinder (1), an actuating piston (2), and a guide plate (4); A support plate is horizontally fixed on the partition plate. The hydraulic cylinder (1) is detachably mounted on the support plate. The actuating piston (2) is installed in the hydraulic cylinder (1) through the guide plate (4) and sealed by a rubber ring to form a high-pressure oil chamber. A return spring (3) is provided between the actuating piston (2) and the guide plate (4). The guide plate (4) is bolted to the hydraulic cylinder body (1) and passes through the through hole opened on the support plate. The guide rod part of the actuating piston (2) passes through the middle guide hole of the guide plate (4) and is connected to the connecting flange of the riveting mechanism (5). The top of the hydraulic cylinder body (1) is provided with an oil inlet hole, which is connected to the hydraulic supply part through a connecting oil circuit.

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