Sealed connection for hydraulic systems

Abstract

The present application relates to the technical field of sealing elements for hydraulic equipment, and specifically discloses a sealing connecting element for a hydraulic system. The aforementioned hydraulic system comprises a hydraulic cylinder, a hydraulic rod and a sealing connecting element. The sealing connecting element is installed at the connection between the hydraulic cylinder and the hydraulic rod, blocks the end of the hydraulic cylinder, and the hydraulic rod is slidingly connected inside the sealing connecting element. The sealing connecting element comprises a seat body, a sealing element and an elastic ring. The seat body is installed on the inner wall of the hydraulic cylinder, and the elastic ring is assembled to the connecting periphery of the sealing element and the hydraulic rod. The sealing element is a circular ring body structure, and a ring of fixing grooves is formed on the inner surface of the circular ring of the sealing element. The present application adds a seat body on the basis of a conventional oil seal to support the inner wall of the oil seal, and the elastic ring is assembled by using equipment, which significantly improves the assembly accuracy, effectively ensures the tightness of the connection between the oil seal and the hydraulic rod, and prevents the internal elastic ring from being offset when the hydraulic rod slides along the oil seal.

Description

Technical Field

[0001] This invention relates to the field of sealing technology in hydraulic equipment, and more specifically, to sealing connections for hydraulic systems. Background Technology

[0002] The function of a hydraulic system is to increase the force by changing the pressure. In a complete set of equipment, a complete hydraulic system consists of five parts: power element, actuator, control element, auxiliary elements (accessories), and hydraulic oil.

[0003] Hydraulic cylinders are one of the commonly used components of hydraulic systems. The sealing connection between the hydraulic rod and the hydraulic cylinder is particularly important in large-scale complete sets of equipment. If the sealing is not good, oil leakage will occur, and the oil pressure will be insufficient, causing the hydraulic rod to be unable to maintain normal operation.

[0004] In sealing connectors, the elastic ring between the snap-fit ​​rod and the seal plays a limiting role. For example, Chinese patent application CN103831775A provides an elastic sealing ring installation tool for accurately installing an elastic sealing ring with an outer diameter larger than the inner diameter of a slender pipe into a designated annular groove inside the slender pipe. This solves the problem that such sealing rings cannot be accurately positioned and are very difficult to install in slender pipes. However, it still has the problem that during installation, uneven expansion and loose installation can easily cause displacement when snapped into the groove. Subsequent repositioning can also cause the elastic ring to twist, affecting the sealing performance and durability of the seal. Summary of the Invention

[0005] This invention provides a sealing connector for hydraulic systems, solving the technical problems in related technologies where the elastic ring in the seal is not tightly fitted during installation, and the elastic ring is prone to deviation and twisting.

[0006] According to one aspect of the present invention, a sealing connector for a hydraulic system is provided. The hydraulic system includes a hydraulic cylinder, a hydraulic rod, and a sealing connector. The sealing connector is installed at the connection between the hydraulic cylinder and the hydraulic rod, and the sealing connector seals the end of the hydraulic cylinder. The hydraulic rod is slidably connected inside the sealing connector. The sealing connector includes a seat, a seal, and an elastic ring. The seat is installed on the inner wall of the hydraulic cylinder, and the elastic ring is assembled to the outer periphery of the connection between the seal and the hydraulic rod. The seal is a ring structure, and a fixing groove is formed inward on the ring surface of the seal. The inner wall of the groove near the fixing groove forms an inner sleeve. A groove for engaging the elastic ring is provided on the outer side of the bottom end of the inner sleeve, and a dustproof flange is provided on the inner edge of the top end of the inner sleeve. When the seal is connected to the hydraulic rod, the inner edge of the dustproof flange abuts against the outer wall of the hydraulic rod.

[0007] Furthermore, the seal has an internal skeleton inside, the shape of which is consistent with the outer contour shape of the seal.

[0008] Also provided is an assembly device for assembling elastic rings and seals in sealing connectors for hydraulic systems. The assembly device includes a worktable, a clamping assembly, an expansion assembly, and a release assembly. The worktable is horizontally arranged, and the clamping assembly, expansion assembly, and release assembly are all located on the worktable. The clamping assembly is located above the expansion assembly and the release assembly. The release assembly is installed on the outer edge of the top of the expansion assembly. The inner edge of the top of the release assembly hooks the elastic ring and drives the elastic ring to deform outward through the expansion assembly, thereby increasing the inner ring enclosure area of ​​the elastic ring. The clamping assembly is used to clamp the seal and drive one end of the inner sleeve of the seal to move towards the release assembly.

[0009] The release assembly includes a vertical plate, a hook plate, a wedge block, a downward pressing protrusion, a latch, and a return spring. The vertical plate has an L-shaped vertical cross-section. The top of the hook plate is movably connected to the horizontal end of the vertical plate. The latch and the wedge block are both located on the inner wall of the hook plate, with the latch positioned closer to the top of the hook plate. The return spring is installed at the end of the latch and provides support force along its length. A lower slot is formed on the outer surface of the top of the vertical plate, and the end of the latch engages with the slot wall. The downward pressing protrusion is vertically inserted into the inner wall of the lower slot. When the clamping assembly drives the sealing element to abut against the lower pressing protrusion, the lower pressing protrusion moves vertically and passes through the lower slot. The lower pressing protrusion abuts against the end of the latch rod, causing the latch rod to disengage from the slot wall of the lower slot. The latch rod compresses the return spring along its rod direction. When the lower pressing protrusion continues to move vertically and abuts against the outer wall of the inclined block, the end face of the lower pressing protrusion and the end face of the inclined block form abutting and pressing fit. The hook plate rotates around its connection with the vertical plate, and the elastic ring disengages from the inner side of the bottom end of the hook plate and is fitted into the groove of the inner sleeve.

[0010] Furthermore, the expansion component is an iris structure, and the expansion component includes an opening / closing component and a trigger component. The opening / closing component is horizontally arranged, and the end of the trigger component is connected to the driving end of the opening / closing component.

[0011] Furthermore, the opening and closing component includes a bracket, opening and closing plates, and a connecting seat. The opening and closing plates are distributed in a ring inside the bracket. The opening and closing plates are connected to the bracket by a shaft. The side walls of the opening and closing plates are connected to each other. One end of the trigger is connected to one of the opening and closing plates. When the trigger drives the opening and closing plate connected to it to rotate, the other opening and closing plates rotate synchronously. The connecting seat is located on the outer edge of the opening and closing plate, and the bottom end of the upright plate is vertically installed on the connecting seat.

[0012] Furthermore, the expansion assembly also includes a plunger and a hydraulic cylinder. The plunger is located at the top of one end of the piston rod of the hydraulic cylinder, and the outer diameter of the plunger is adapted to the inner diameter of the inner sleeve.

[0013] Furthermore, a rotating shaft is provided at the connection between the end of the upright plate and the end of the hook plate, and a disc spring is installed at the end of the rotating shaft.

[0014] Furthermore, the hook plate has a "J" shaped structure, and the inner wall at the bottom end of the hook plate is provided with a frosted layer.

[0015] Furthermore, the height of the hook plate is the same as the height of the inner sleeve, and the bottom end of the inner sleeve has an inwardly tapering structure.

[0016] Furthermore, the pressing protrusion has limit grooves on both sides, and a support spring is provided in the limit groove. The bottom end of the support spring is abutted against the end face of the upright plate. The support spring is used to provide support force for the pressing protrusion to reset along the vertical direction.

[0017] The beneficial effects of this invention are as follows:

[0018] This sealing connector adds a seat to the traditional oil seal. The seat abuts against the inner wall of the oil seal, and the elastic ring is assembled using equipment, which significantly improves the assembly accuracy and can effectively ensure the tightness between the oil seal and the hydraulic rod. At the same time, when the hydraulic rod slides along the inside of the oil seal, the internal elastic ring will not shift.

[0019] The assembly equipment incorporates a downward pressing protrusion. When the elastic ring and the seal are connected, the elastic ring will quickly contract and engage with the groove of the inner sleeve. Since the elastic ring contracts 360° inward, it will not be skewed or twisted. At the same time, when the seal is discharged, the groove of the inner sleeve is further pressed inward, causing the elastic ring to be pressed into the groove, thus improving the connection stability between the elastic ring and the seal. Attached Figure Description

[0020] Figure 1 This is an assembly diagram of a sealing connector for a hydraulic system proposed in this invention;

[0021] Figure 2 yes Figure 1 Top view of the seal in the middle;

[0022] Figure 3 yes Figure 2 AA cross-section view;

[0023] Figure 4 yes Figure 1 Top view of the elastic ring in the middle;

[0024] Figure 5 This is a schematic diagram of an assembly equipment structure proposed in this invention;

[0025] Figure 6 yes Figure 5 Enlarged view of part B in the middle;

[0026] Figure 7 yes Figure 5 Schematic diagram of the connection structure between the opening / closing component and the release assembly;

[0027] Figure 8 yes Figure 5 The main view of the component is held in the middle;

[0028] Figure 9 yes Figure 5 Schematic diagram of the release component structure;

[0029] Figure 10 yes Figure 9 Release the component's side view in the middle;

[0030] Figure 11 yes Figure 10 Diagram showing the motion of the hook plate after the lower pressure protrusion moves downward.

[0031] In the diagram: 100, hydraulic cylinder; 200, base; 300, elastic ring; 400, seal; 410, fixing groove; 420, dustproof flange; 430, inner sleeve; 440, inner frame; 500, hydraulic rod; 600, assembly equipment; 610, workbench; 620, hopper; 630, sliding assembly; 640, conveyor belt assembly; 650, push rod motor; 660, lifting assembly; 670, clamping assembly; 671, slide rod; 672 673. Fixture base; 680. Drive component; 681. Expansion assembly; 682. Insert rod; 683. Opening and closing component; 684. Bracket; 685. Opening and closing plate; 686. Connecting seat; 687. Hydraulic cylinder; 688. Trigger; 699. Release assembly; 690. Vertical plate; 691. Pressing protrusion; 692. Lower slot; 693. Disc spring; 694. Rotating shaft; 695. Hook plate; 696. Inclined block; 697. Buckle; 698. Return spring. Detailed Implementation

[0032] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed to enable those skilled in the art to better understand and implement the subject matter described herein. Changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.

[0033] See Figures 1-3As shown, this embodiment proposes a sealing connector for a hydraulic system. The hydraulic system includes a hydraulic cylinder 100, a hydraulic rod 500, and a sealing connector. The sealing connector is installed at the connection between the hydraulic cylinder 100 and the hydraulic rod 500, sealing the end of the hydraulic cylinder 100. The hydraulic rod 500 is slidably connected inside the sealing connector. The sealing connector includes a seat 200, a seal 400, and an elastic ring 300. The seat 200 is installed on the inner wall of the hydraulic cylinder 100, and the elastic ring 300 is assembled to the outer periphery of the connection between the seal 400 and the hydraulic rod 500. The seal 400 has a circular ring structure, and a fixing groove 410 is formed inward on the annular surface of the seal 400. The inner wall of the groove near the fixing groove 410 forms an inner sleeve 430. The bottom outer side of the inner sleeve 430 is provided with a groove for engaging the elastic ring 300. The top inner edge of the inner sleeve 430 is provided with a dustproof flange 420. When the seal 400 is connected to the hydraulic rod 500, the inner edge of the dustproof flange 420 abuts against the outer wall of the hydraulic rod 500. The seal 400 has an inner skeleton 440 inside, and the shape of the inner skeleton 440 is consistent with the outer contour shape of the seal 400.

[0034] The sealing connector includes a seat 200. The inner wall of the mounting end of the hydraulic cylinder 100 is threaded, and the outer wall of the seat 200 is provided with a matching threaded groove. The seat 200 is threadedly installed onto the inner wall of the hydraulic cylinder 100. The sealing element 400 is sleeved on the outer wall of the hydraulic rod 500. Then, the rod end of the hydraulic rod 500 is inserted into the hydraulic cylinder 100. The sealing element 400 is installed at the end of the hydraulic cylinder 100. The end of the seat 200 is inserted into the fixing groove 410 and abuts against the outer wall of the inner sleeve 430. The elastic ring 300 presses against the bottom end of the inner sleeve 430 and abuts against the rod wall of the hydraulic rod 500. After the sealing element 400 is installed, a sealing cap is installed at the end of the hydraulic cylinder 100. The sealing cap is pressed against the outer wall of the sealing element 400 to ensure the sealing of the end of the hydraulic cylinder 100.

[0035] The dustproof flange 420 is designed to prevent dirt from the surface of the hydraulic rod 500 from being brought into the seal 400 and the hydraulic cylinder 100 when the hydraulic rod 500 moves.

[0036] The inner skeleton 440 is designed to enhance the rigidity of the entire seal 400 and ensure that the shape of the seal 400 will not deform after it is connected to the seat 200.

[0037] See Figures 4-11As shown, this embodiment also proposes an assembly device 600, which is used to assemble the elastic ring 300 and the seal 400 in the sealing connector. The assembly device 600 includes a worktable 610, a clamping assembly 670, an expansion assembly 680, and a release assembly 690. The worktable 610 is horizontally arranged, and the clamping assembly 670, the expansion assembly 680, and the release assembly 690 are all disposed on the worktable 610. The clamping assembly 670 is located above the expansion assembly 680 and the release assembly 690. The release assembly 690 is installed on the outer edge of the top end of the expansion assembly 680. The inner edge of the top end of the release assembly 690 hooks the elastic ring 300, and the expansion assembly 680 drives the elastic ring 300 to deform outward, thereby increasing the inner ring enclosure area of ​​the elastic ring 300. The clamping assembly 670 is used to clamp the seal 400 and drive one end of the inner sleeve 430 of the seal 400 to move toward the release assembly 690.

[0038] The expansion assembly 680 includes a insertion rod 681 and a hydraulic cylinder 683. The insertion rod 681 is located at the top of one end of the piston rod of the hydraulic cylinder 683. The outer diameter of the insertion rod 681 is adapted to the inner diameter of the inner sleeve 430. That is, when the clamping assembly 670 clamps the seal 400 above the expansion assembly 680, the hydraulic cylinder 683 drives the insertion rod 681 to move upward and insert it into the inner sleeve 430. After the clamping assembly 670 is released, the insertion rod 681 drives the seal 400 to move downward and engage with the elastic ring 300.

[0039] The release assembly 690 includes a vertical plate 691, a hook plate 696, a wedge block 697, a pressing protrusion 692, a latch 698, and a return spring 699. The vertical section of the vertical plate 691 is L-shaped. The top of the hook plate 696 is movably connected to the horizontal end of the vertical plate 691. The latch 698 and the wedge block 697 are both located on the inner wall of the hook plate 696. The latch 698 is positioned near the top of the hook plate 696. The return spring 699 is installed at the end of the latch 698 and provides support force for the latch 698 along its rod direction. A lower slot 693 is formed on the outer surface of the top of the vertical plate 691. The end of the latch 698 is engaged in the slot wall of the lower slot 693. The pressing protrusion 692 is vertically inserted into the lower slot. When the clamping assembly 670 drives the sealing element 400 to abut against the lower pressing protrusion 692, the lower pressing protrusion 692 moves vertically and passes through the lower slot 693. The lower pressing protrusion 692 abuts against the end of the latch rod 698, causing the latch rod 698 to disengage from the slot wall of the lower slot 693. The latch rod 698 compresses the return spring 699 along its rod direction. When the lower pressing protrusion 692 continues to move vertically and abuts against the outer wall of the inclined block 697, the end face of the lower pressing protrusion 692 and the end face of the inclined block 697 form abutting and pressing fit. The hook plate 696 rotates around its connection with the upright plate 691. The elastic ring 300 disengages from the inner side of the bottom end of the hook plate 696 and is fitted into the groove of the inner sleeve 430.

[0040] The pressing protrusion 692 has limit grooves on both sides, and a support spring is provided in the limit groove. The bottom end of the support spring is abutted against the end face of the upright plate 691. The support spring is used to provide support force for the pressing protrusion 692 to reset in the vertical direction. That is, in the initial state, the pressing protrusion 692 is located in the slot of the lower slot 693, and its lower end is not in contact with the latch 698. After the elastic element disengages from the hook plate 696, the sealing element 400 will be driven upward by the insertion rod 681. At this time, the pressing protrusion 692 is reset under the action of the support spring. At the same time, the abutment relationship between the inclined block 697 and the pressing protrusion 692 is released, and the hook plate 696 can be reset under the action of the coil spring 694.

[0041] The height of the hook plate 696 is the same as the height of the inner sleeve 430, and the bottom end of the inner sleeve 430 has an inwardly tapering structure. This design is so that when the hook plate 696 is abutted and rotated, the hook plate 696 tilts and abuts against the outer wall of the inner sleeve 430. The lower end of the hook plate 696 is higher than the groove position of the inner sleeve 430. When released, the elastic ring 300 contracts and can contract to the groove position, ensuring that the position of the elastic ring 300 corresponds to the groove position.

[0042] A rotating shaft 695 is provided at the connection between the end of the upright plate 691 and the end of the hook plate 696. A coil spring 694 is installed at the end of the rotating shaft 695. The coil spring 694 can reset the hook plate 696 to the upright position. That is, when the pressing protrusion 692 is removed from the lower slot 693, the restoring force of the coil spring 694 drives the hook plate 696 to reset to the side of the upright plate 691.

[0043] The expansion component 680 is an iris structure. The expansion component 680 includes an opening and closing component 682 and a trigger component 684. The opening and closing component 682 is horizontally arranged. The end of the trigger component 684 is connected to the driving end of the opening and closing component 682. The opening and closing component 682 includes a bracket 682a, an opening and closing plate 682b, and a connecting seat 682c. The opening and closing plates 682b are distributed in a ring inside the bracket 682a. The opening and closing plates 682b and the bracket 682a are connected by a shaft. The side walls of the opening and closing plates 682b are connected to each other. One end of the trigger component 684 is connected to one of the opening and closing plates 682b. When the trigger component 684 drives the opening and closing plate 682b connected to it to rotate, the other opening and closing plates 682b rotate synchronously. The connecting seat 682c is located on the outer edge of the opening and closing plate 682b, and the bottom end of the upright plate 691 is vertically installed on the connecting seat 682c.

[0044] The bracket 682a has an inclined limiting groove on its inner side, and the opening and closing plate 682b has a limiting post at its end, with the limiting post slidably connected in the inclined limiting groove.

[0045] It should be further explained that the trigger 684 includes, but is not limited to, linear motion components such as cylinders, push rod motors 650 or miniature hydraulic rods. The end of the trigger 684 is connected to one of the opening and closing plates 682b via a shaft. Moving along the tangential direction of the outer edge of the opening and closing plate 682b will cause the opening and closing plate 682b to rotate around the position of its connection shaft with the bracket 682a. The opening and closing plates 682b abut against each other, and thus open and close accordingly, causing the upright plates 691 located on the connecting seat 682c to expand outward and pull the elastic ring 300 located inside the hook plate 696 to open.

[0046] It should be noted that the hook plate 696 has a "J" shaped structure, and the inner wall of the bottom end of the hook plate 696 is provided with a frosted layer. When the expansion component 680 drives the elastic ring 300 to expand inside the hook plate 696, the elastic ring 300 will slide relative to the inner side of the hook plate 696. The frosted layer can polish the inner wall of the elastic ring 300 and remove burrs.

[0047] It should also be noted that the assembly equipment 600 further includes a sliding assembly 630, a conveyor belt assembly 640, a push rod motor 650, and a lifting assembly 660. The sliding assembly 630 includes, but is not limited to, a slide rail. The sliding assembly 630 is used to drive the conveyor belt assembly 640, the push rod motor 650, and the lifting assembly 660 to move towards the expansion assembly 680. The slide rail is provided with a sliding table, and the conveyor belt assembly 640, the push rod motor 650, and the lifting assembly 660 are all located on the sliding table. The clamping assembly 670 is mounted on the lifting assembly. At the end of the lifting component 660, the lifting component 660 includes, but is not limited to, a lifting hydraulic cylinder 683 and other driving components 673. The conveyor belt assembly 640 includes, but is not limited to, two transversely arranged conveyor belts. The push rod motor 650 is located at the end of the conveyor belt assembly 640. The output end of the push rod motor 650 is connected to a push plate. The push plate pushes the sealing component 400 conveyed by the conveyor belt assembly 640 to the clamping component 670 for clamping. The clamping component 670 clamps the sealing component 400 and moves it above the expansion component 680 through the sliding component 630.

[0048] The clamping assembly 670 includes a clamping base 672, a slide bar 671, and a driving component 673. The driving component 673 includes, but is not limited to, a stepper motor and a stepper screw. The clamping base 672 is sleeved on the slide bar 671. The stepper screw is inserted inside the clamping base 672. The output shaft of the stepper motor is connected to one end of the stepper screw. The clamping base 672 is provided with clamps, including but not limited to pneumatic clamps, electric clamps, and other clamping components.

[0049] When using this sealing connector for hydraulic systems, the elastic ring 300 and the seal 400 need to be assembled before being assembled with the seat 200 and other components into the hydraulic system to form a stable sealing structure. The assembly process of the elastic ring 300 and the seal 400 is as follows:

[0050] When the elastic ring 300 is assembled, it is placed inside the release component 690. At this time, the elastic ring 300 is in a relaxed state and overlaps the inner wall of the hook plate 696. The clamping component 670 horizontally transports the seal 400 to the top of the insert rod 681. The insert rod 681 moves under the drive of the hydraulic cylinder 683 and abuts against the inner sleeve 430 of the seal 400, causing the groove on the inner sleeve 430 to expand. At this time, the hydraulic cylinder 683 and the clamping component 670 move downward synchronously. The clamp of the clamping component 670 releases first. At this time, the insert rod 681 drives the seal 400 to continue to press downward.

[0051] At this time, the expansion component 680 operates synchronously. Through the iris opening and closing structure, the expansion component 680 expands the vertical plate 691 at the end of the opening and closing plate 682b outward. As the vertical plate 691 expands outward, it slides along an arc at the center. The elastic ring 300 is inside the hook plate 696 and is subjected to the outward stretching force of the hook plate 696. At the same time, the elastic ring 300 slides relative to the inner wall of the hook plate 696 that slides along the arc. The inner side of the hook plate 696 is provided with a frosted layer, which can effectively remove the burrs on the inner wall of the elastic ring 300, ensuring that the joint between the elastic ring 300 and the inner sleeve 430 will not have gaps due to burrs.

[0052] With continued downward pressure, the groove wall of the fixing groove 410 of the seal 400 abuts against the top of the pressing protrusion 692. The pressing protrusion 692 presses downward vertically, compressing the support spring. The bottom end of the pressing protrusion 692, near the inclined block 697, has an inclined structure. The pressing protrusion 692 first abuts against the latch 698. The latch 698 is initially horizontal, and its end is a trapezoidal locking block. The trapezoidal locking block at the end of the latch 698 abuts against the groove wall of the lower slot 693, forming a... The stable locking structure allows the hook plate 696 to provide good lateral support during expansion. The downward pressure of the pressing protrusion 692 will release the stable locking structure, and the trapezoidal locking block at the end of the latch 698 will be abutted by the inclined opening of the pressing protrusion 692. The end of the latch 698 will detach from the groove wall, and further compression will cause the latch 698 to move along its length, compressing the return spring 699 at its end. At this time, the hook plate 696 and the upright plate 691 can move freely, which is convenient for subsequent rotation.

[0053] As the pressure is applied further, the bevel of the pressing protrusion 692 abuts against the bevel block 697, causing the hook plate 696 to tilt towards the inner sleeve 430. At this time, the lower edge of the hook plate 696 can no longer restrain the elastic ring 300, and the elastic ring 300 will quickly contract and engage with the groove of the inner sleeve 430. Since the elastic ring 300 contracts 360° inward, the elastic ring 300 will not be skewed or twisted.

[0054] The uniform contraction of the elastic ring 300 avoids misalignment within the groove due to uneven expansion and loose installation. Even after misalignment, the elastic ring 300 may twist when returning to the groove, causing the tightening position of the elastic ring 300 to be easily misaligned after the hydraulic rod 500 is inserted, affecting the sealing performance and durability of the seal.

[0055] Next, the sealing element 400 is clamped by the clamping assembly 670 and removed from the insert rod 681. The inner sleeve 430 returns to its original position, and the groove in its open state contracts inward. The groove wall hugs the elastic ring 300 located in the groove at this time, so that it is stably fixed in the groove and will not shift.

[0056] After the seal 400 is removed, the pressing protrusion 692 will reset under the action of the support spring, and the hook plate 696 will reset under the action of the coil spring 694. At the same time, the reset spring 699 pushes out the latch 698. When the hook plate 696 moves towards the end of the upright plate 691, the extended end of the latch 698 engages with the groove wall of the lower slot 693, forming a connection between the hook plate 696 and the upright plate 691. The expansion assembly 680 retracts inward, and another elastic ring 300 is installed on the inner side of the hook plate 696 for the next assembly work.

[0057] The sliding component 630 is moved to move the installed seal 400 to above the hopper 620. The hopper 620 is located below the middle of the worktable 610. After the seal 400 is discharged through the hopper 620, the assembled seal 400 can be taken out and installed on the hydraulic rod 500.

[0058] The seat 200 is threaded onto the inner wall of the end of the hydraulic cylinder 100. The outer wall of the seat 200 has a matching threaded groove, and the middle of the seat 200 has a through hole with a flange on the inner edge of the bottom end of the through hole. The rod wall of the hydraulic rod 500 is slidably connected in the through hole. The seat 200 is threaded onto the inner wall of the hydraulic cylinder 100. The sealing element 400 is sleeved on the outer wall of the hydraulic rod 500, and then the rod end of the hydraulic rod 500 is inserted into the hydraulic cylinder. Inside the cylinder 100, the seal 400 is installed at the end of the hydraulic cylinder 100. The end of the seat 200 is inserted into the fixing groove 410 and abuts against the outer wall of the inner sleeve 430. The elastic ring 300 presses against the bottom end of the inner sleeve 430 and abuts against the rod wall of the hydraulic rod 500. After the seal 400 is installed, a sealing cap is installed at the end of the hydraulic cylinder 100. The sealing cap is pressed against the outer wall of the seal 400 to ensure the sealing of the end of the hydraulic cylinder 100.

[0059] During use, the pusher at the bottom of the hydraulic rod 500 moves along the rod direction under the action of the oil, and the hydraulic rod 500 pushes out the hydraulic cylinder 100. The oil encounters the seat 200 and its flange as the first layer of barrier, and reaches the connection between the seat 200 and the seal 400 as the second layer of barrier. The elastic ring 300 is the third layer of barrier. The three layers of barrier effectively ensure the sealing stability of the hydraulic cylinder 100, and the durability is better than that of traditional oil seals.

[0060] The embodiments of this embodiment have been described above with reference to the accompanying drawings. However, this embodiment is not limited to the specific implementation methods described above. The specific implementation methods described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this embodiment without departing from the spirit of this embodiment and the scope of protection of the claims, and all of these forms are within the protection scope of this embodiment.

Claims

1. An assembly device (600) for assembling a sealing connector for a hydraulic system, the hydraulic system including a hydraulic cylinder (100), a hydraulic rod (500) and a sealing connector, the sealing connector being installed at the connection between the hydraulic cylinder (100) and the hydraulic rod (500), the sealing connector sealing the end of the hydraulic cylinder (100), and the hydraulic rod (500) being slidably connected inside the sealing connector, the sealing connector including a seat (200), a seal (400) and an elastic ring (300), the seat (200) being installed on the inner wall of the hydraulic cylinder (100), and the elastic ring (300) being assembled to the periphery of the connection between the seal (400) and the hydraulic rod (500), characterized in that, The sealing element (400) has a ring structure, and a fixing groove (410) is opened inward on the ring surface of the sealing element (400). The inner wall of the groove near the fixing groove (410) forms an inner sleeve (430). The bottom outer side of the inner sleeve (430) is provided with a groove, and the elastic ring (300) is engaged in the groove. The top inner edge of the inner sleeve (430) is provided with a dustproof flange (420). When the sealing element (400) is connected to the hydraulic rod (500), the inner edge of the dustproof flange (420) abuts against the outer wall of the hydraulic rod (500). The assembly equipment (600) includes a worktable (610), a clamping assembly (670), an expansion assembly (680), and a release assembly (690). 10) The clamping assembly (670), expansion assembly (680) and release assembly (690) are all set on the worktable (610). The clamping assembly (670) is located above the expansion assembly (680) and the release assembly (690). The release assembly (690) is installed on the outer edge of the top of the expansion assembly (680). The inner edge of the top of the release assembly (690) hooks the elastic ring (300) and drives the elastic ring (300) to deform outward through the expansion assembly (680), so that the inner ring enclosure area of ​​the elastic ring (300) increases. The clamping assembly (670) is used to clamp the seal (400) and drive one end of the inner sleeve (430) of the seal (400) to move toward the release assembly (690). The release assembly (690) includes a vertical plate (691), a hook plate (696), a wedge block (697), a pressing protrusion (692), a latch (698), and a return spring (699). The vertical section of the vertical plate (691) is L-shaped. The top of the hook plate (696) is movably connected to the horizontal end of the vertical plate (691). The latch (698) and the wedge block (697) are both located on the inner side wall of the hook plate (696). The latch (698) is positioned close to the top of the hook plate (696). The return spring (699) is installed at the end of the latch (698) and provides support force for the latch (698) along its rod direction. A lower slot (693) is provided on the outer surface of the top of the vertical plate (691). The end of the latch (698) is engaged in the groove wall of the lower slot (693). The pressing protrusion (692) is vertically inserted. When the clamping assembly (670) drives the seal (400) to abut against the inner wall of the lower slot (693), the lower pressing protrusion (692) moves vertically and passes through the lower slot (693). The lower pressing protrusion (692) abuts against the end of the latch (698), causing the latch (698) to disengage from the slot wall of the lower slot (693). The latch (698) presses along its rod direction. When the retracting spring (699) and the pressing protrusion (692) continue to move vertically and abut against the outer wall of the inclined block (697), the end face of the pressing protrusion (692) and the end face of the inclined block (697) form a pressing fit. The hook plate (696) rotates around the connection between it and the upright plate (691). The elastic ring (300) disengages from the inner side of the bottom end of the hook plate (696) and is fitted into the groove of the inner sleeve (430).

2. The assembly equipment according to claim 1, characterized in that, The expansion component (680) is an iris structure. The expansion component (680) includes an opening and closing member (682) and a trigger member (684). The opening and closing member (682) is horizontally arranged, and the end of the trigger member (684) is connected to the driving end of the opening and closing member (682).

3. The assembly equipment according to claim 2, characterized in that, The opening and closing component (682) includes a bracket (682a), an opening and closing plate (682b), and a connecting seat (682c). The opening and closing plates (682b) are arranged in a ring inside the bracket (682a). The opening and closing plates (682b) and the bracket (682a) are connected by a shaft. The side walls of the opening and closing plates (682b) are connected to each other. One end of the trigger (684) is connected to one of the opening and closing plates (682b). When the trigger (684) drives the opening and closing plate (682b) connected to it to rotate, the other opening and closing plates (682b) rotate synchronously. The connecting seat (682c) is located on the outer edge of the opening and closing plate (682b), and the bottom end of the upright plate (691) is vertically installed on the connecting seat (682c).

4. The assembly equipment according to claim 3, characterized in that, The expansion assembly (680) also includes a plunger (681) and a hydraulic cylinder (683). The plunger (681) is located at the top of one end of the piston rod of the hydraulic cylinder (683), and the outer diameter of the plunger (681) is adapted to the inner diameter of the inner sleeve (430).

5. An assembly device according to claim 1, characterized in that, A rotating shaft (695) is provided at the connection between the end of the upright plate (691) and the end of the hook plate (696), and a disc spring (694) is installed at the shaft end of the rotating shaft (695).

6. The assembly equipment according to claim 5, characterized in that, The hook plate (696) has a "J" shaped structure, and the bottom inner wall of the hook plate (696) is provided with a frosted layer.

7. An assembly device according to claim 6, characterized in that, The height of the hook plate (696) is the same as the height of the inner sleeve (430), and the bottom end of the inner sleeve (430) has an inwardly tapered structure.

8. An assembly device according to claim 1, characterized in that, Both sides of the pressing protrusion (692) have limit grooves, and a support spring is provided in the limit groove. The bottom end of the support spring is abutted against the end face of the upright plate (691). The support spring is used to provide support force for the pressing protrusion (692) to reset along the vertical direction.

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