A device for online disassembly and replacement of universal joint shaft

Abstract

The present invention discloses a device for online disassembly and replacement of a universal joint, comprising a ⌚-shaped operating frame, comprising an upper crossbeam, a lower crossbeam and a longitudinal beam, wherein the upper crossbeam and the lower crossbeam are respectively vertically welded to the two ends of the longitudinal beam. The present invention promotes the ⌚-shaped operating frame to the limit position by pushing a lifting rod, utilizes a limit plug rod to cooperate with a driving mechanism to rotate the ⌚-shaped operating frame 90 degrees, so that the hook and the balance hook are located at the top state, adopts a gantry as a driving crane, connects the hook and the balance hook with the help of at least two strands of steel wire traction ropes, so that the ⌚-shaped operating frame can be towed and lifted, and the entire ⌚-shaped operating frame stands up in a stable and vertical posture, which is convenient for operators and auxiliary personnel to accompany safely, and is lifted to the universal joint, and is clamped and limited by a clamping hoop limiting part. After the universal joint is tightly clamped, the operator disassembles the universal joint and then lifts it out to achieve replacement, thereby solving the hidden danger of the universal joint being easy to slip in the prior art, and significantly improving safety and work efficiency.

Description

Technical Field

[0001] The invention relates to the field of universal joint maintenance equipment, in particular to a device for online disassembly and replacement of universal joints. Background Art

[0002] Rolling mills are crucial equipment in the production process of rod and wire rod mills in the metallurgical industry, and they are typically driven by gearboxes. In this structure, universal joints connect the rotating rollers. Because these shafts are typically large and vertically mounted on vertical stands, they are bulky and tall. Consequently, replacement is extremely difficult. Lifting with wire ropes is difficult and prone to slippage, posing a safety hazard. Furthermore, disassembling the shafts can cause one end to tilt during lifting due to their own weight, making this an extremely unsafe and difficult problem. Furthermore, replacement is time-consuming, resulting in a significant waste of human resources and time costs, and unresolved safety issues.

[0003] The Chinese patent application number 201911058751.8 discloses a vertical rolling mill universal shaft maintenance tool and maintenance method, which adopts the following steps: S1, using the vertical rolling mill universal shaft maintenance tool to clamp the universal shaft of the vertical rolling mill; the vertical rolling mill universal shaft maintenance tool includes a frame and a clamping mechanism installed on the frame, the clamping mechanism includes a first clamping plate installed on the frame and having a first U-shaped slot and a second clamping plate installed on the frame and having a second U-shaped slot, and two clamping blocks are installed on the first clamping plate; the step S1 includes the following steps: using the first U-shaped slot and the second U-shaped slot to clamp the upper flange fork and the lower flange fork of the universal shaft respectively, and the two clamping blocks approach each other until the upper flange fork of the universal shaft is clamped; S2, disconnecting the universal shaft from the vertical rail machine body; S3, moving the vertical rolling mill universal shaft maintenance tool and the universal shaft to the maintenance area. The maintenance method in the invention is more efficient.

[0004] However, the above does not provide a placement method for the vertical rolling mill universal joint maintenance tooling. Since the vertical rolling mill universal joint maintenance tooling has a large overall structure, high height, and heavy weight, there is a safety hazard of tipping over, and it occupies a large space. In addition, the clamping mechanism in this solution is not convenient for flexible adjustment and stable limiting of the universal joint, which is not conducive to online safe production.

[0005] Therefore, it is necessary to develop a device for online disassembly and replacement of the universal joint to solve the above problems. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a device for online disassembly and replacement of a universal shaft in view of the deficiencies of the above-mentioned prior art. By pushing the pick rod, the U-shaped operating frame is lifted to the extreme position, and the U-shaped operating frame is rotated 90° by using the limit insertion rod in cooperation with the driving mechanism, so that the hook and the balance hook are in the top state. The gantry is used as a traveling crane, and at least two wire traction ropes are used to connect the hook and the balance hook, so that the U-shaped operating frame can be towed and lifted. The entire U-shaped operating frame stands up in a stable and vertical posture, and the operator and the assistant stand on it for follow-up. It is hoisted to the universal shaft, clamped and limited by the hoop limiting part. After the universal shaft is tightened, the operator disassembles the universal shaft and then hoists it out to solve the above-mentioned deficiencies in the background technology.

[0007] To solve the above technical problems, the technical solution adopted by the present invention is:

[0008] A device for online disassembly and replacement of a universal shaft, comprising:

[0009] A U-shaped operating frame, including an upper cross beam, a lower cross beam and a longitudinal beam. The upper cross beam and the lower cross beam are respectively vertically welded to both ends of the longitudinal beam. A hook is fixedly connected to the end of the upper cross beam, and a number of uniformly distributed threaded holes are also opened on it. A balance hook is detachably installed in the threaded holes. Traction steel wires are connected to both the hook and the balance hook for lifting the U-shaped operating frame;

[0010] A hoop limiting part for clamping the end of the universal shaft to maintain and replace it. The hoop limiting part is installed inside the concave arc opening provided at the end of the lower cross beam;

[0011] A placement mechanism for storing the U-shaped operating frame in an idle state and adjusting the angle of the U-shaped operating frame. It includes a placement frame. Limiting vertical grooves are penetrated through both sides of the placement frame. A C-shaped frame plate is slidably connected inside the limiting vertical grooves. A hydraulic cylinder is fixedly connected to the placement frame, and the output end of the hydraulic cylinder is传动连接 with the C-shaped frame plate. A pick rod is slidably connected inside the C-shaped frame plate, and a stop pin is movably inserted at its end. A rack plate is integrally provided at the top of the pick rod. A first driving motor is fixedly connected to the outside of the C-shaped frame plate, and the output shaft of the first driving motor is传动连接 with a gear that meshes and drives the rack plate. A torsion sleeve is rotatably connected to the middle position of the top of the placement frame. A limiting insertion hole is penetrated through the axis of the torsion sleeve, and a limiting insertion rod is movably arranged inside it. A limiting combination sleeve is fixedly connected to the middle part of the outside of the longitudinal beam, and a limiting groove matching the limiting insertion rod is opened inside the limiting combination sleeve. The torsion sleeve cooperates with the limiting insertion rod to adjust the placement angle of the U-shaped operating frame through a driving mechanism.

[0012] Preferably, the hoop limiting part includes a first hoop arm and a second hoop arm. A bearing plate is integrally provided at the middle section position of the concave arc opening of the U-shaped operating frame. A positioning shaft rod is fixedly connected to the center of the bearing plate. The first hoop arm and the second hoop arm are respectively rotatably sleeved on the positioning shaft rods on both sides of the bearing plate, and the first hoop arm and the second hoop arm are symmetrically distributed about the center. First positioning piles are provided on both sides of the end of the lower cross beam of the U-shaped operating frame. Second positioning piles are provided on the outer sides of the first hoop arm and the second hoop arm. A cylinder is hinged between the corresponding first positioning pile and the second positioning pile for controlling the opening and closing movement of the first hoop arm and the second hoop arm.

[0013] Preferably, arc-shaped through holes distributed coaxially are formed on the opposite sides of the first hoop arm and the second hoop arm, and the number of arc-shaped through holes on the first hoop arm or the second hoop arm is at least one. When the first hoop arm and the second hoop arm are closed, two relatively arranged arc-shaped through holes form a closed circle, and a protective cushion layer is arranged inside the closed circle. The protective cushion layer is made of hard rubber material.

[0014] Preferably, the protective cushion layer includes a first inner lining plate and a second inner lining plate. The arc-shaped outer walls of the first inner lining plate and the second inner lining plate are respectively fitted to the inner sides of the arc-shaped through holes of the first hoop arm and the second hoop arm and are installed by bolt combination. Thickened stress-bearing blocks are integrally provided at the ends of the first inner lining plate and the second inner lining plate, and grooves for accommodating the bolt heads are formed thereon.

[0015] The first hoop arm and the second hoop arm are distributed in a staggered manner, and the outer side surface of the thickened stress-bearing block connected to the first hoop arm is flush with the outer side surface of the second hoop arm, and the outer side surface of the thickened stress-bearing block connected to the second hoop arm is flush with the outer side surface of the first hoop arm.

[0016] Preferably, the upper cross beam, the lower cross beam and the longitudinal beam are all made of I-shaped steel, and multiple groups of reinforcing ribs are welded on both sides of the I-shaped steel. Pedal plates are fixedly connected to the outer sides of the first hoop arm and the second hoop arm.

[0017] Preferably, safety holes are formed in the I-shaped steel for passing through safety belts.

[0018] Preferably, inner support wedge blocks are welded on the inner sides of the joints of the upper cross beam and the lower cross beam with the longitudinal beam, and an anti-slip layer is covered on the inclined surface of the inner support wedge block. The anti-slip layer is made of soft rubber material.

[0019] Preferably, the driving mechanism includes a second driving motor, which is fixed on the back of the placing rack, and the torsion sleeve extends out of the back of the placing rack. An annular chain gear is fixedly connected to the outside of the torsion sleeve. The output shaft of the second driving motor is drivingly connected with a sprocket wheel, and a chain for chain drive cooperation is sleeved outside the sprocket wheel and the annular chain gear.

[0020] Preferably, a hydraulic mechanism for providing kinetic energy is provided at the connecting end of the hydraulic cylinder, and a pneumatic mechanism for providing kinetic energy is provided at the connecting end of the air cylinder;

[0021] A travel switch is installed at the top of the limiting vertical groove, which cooperates with the C-shaped frame plate to locate the lifting limit position of the U-shaped operating frame. When the U-shaped operating frame is in the limit position, the limiting insertion hole and the limiting groove are coaxially distributed;

[0022] A pressure sensor is installed inside the arc-shaped through hole of the first holding arm or the second holding arm to sense the extrusion force of the holding hoop limiting part on the universal shaft.

[0023] The device for online disassembling and replacing the universal shaft further includes a control panel, the connecting end of which is electrically connected to a single-chip microcomputer. The input end and the output end of the single-chip microcomputer are respectively electrically connected to an A / D converter and a D / A converter. The travel switch and the pressure sensor are both wirelessly communicatively connected to the A / D converter. The first driving motor, the second driving motor, the hydraulic mechanism and the pneumatic mechanism are all wirelessly communicatively connected to the D / A converter.

[0024] The present invention has the following beneficial effects:

[0025] 1. By pushing the pick rod to lift the U-shaped operating frame to the extreme limit position, using the limiting insertion rod to cooperate with the driving mechanism to rotate the U-shaped operating frame by 90°, making the hook and the balance hook in the top state, using the gantry as a traveling crane, with at least two wire traction ropes, connecting the hook and the balance hook, so that the U-shaped operating frame can be towed and lifted. The entire U-shaped operating frame stands up in a stable and vertical posture, facilitating the safe随行 of operators and assistants. It is hoisted to the universal shaft, clamped and limited by the holding hoop limiting part. After tightly holding the universal shaft, the operator disassembles the universal shaft and then hoists it out for replacement, realizing online safe production, solving the hidden danger of the universal shaft being prone to slipping in the prior art, and significantly improving both safety and work efficiency;

[0026] 2. By setting up a placement mechanism, the U-shaped operating frame in the idle state is three-dimensionally stored, its bottom is separated from the ground, reducing the space occupation area, reducing the probability of its surface rust, reducing the safety hazard of tipping over, improving the safety of workshop staff, and adjusting it to the working state angle during use, so as to realize the preparation before stable hoisting. The operation process is simple and convenient, and the pneumatic mechanism is used to control the telescopic movement of the output end of the air cylinder, pushing or pulling the first holding arm and the second holding arm to twist on the positioning shaft rod, first unfolding the first holding arm and the second holding arm, and then making them close after corresponding to the outer side of the shaft body of the universal shaft, which is convenient for restricting and hoisting universal shaft workpieces in different specifications in the combed and erected state;

[0027] 3. Through the cooperation of the U-shaped operating frame and the hoop limiting part in this device, the universal shaft workpiece can be continuously operated to achieve the purpose of online disassembly and replacement. Further, in cooperation with the intelligent control system, the automation degree of this device can be improved, facilitating the precise control of the operation process and enhancing the work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The first perspective three-dimensional view of the overall structure of the device for online disassembly and replacement of the universal shaft provided by the present invention;

[0029] Figure 2 The second perspective three-dimensional view of the overall structure of the device for online disassembly and replacement of the universal shaft provided by the present invention;

[0030] Figure 3 The front view of the overall structure of the device for online disassembly and replacement of the universal shaft provided by the present invention;

[0031] Figure 4 The side view of the overall structure of the device for online disassembly and replacement of the universal shaft provided by the present invention;

[0032] Figure 5 The reference diagram of the cooperation structure between the U-shaped operating frame and the universal shaft in the use state of the present invention;

[0033] Figure 6 The first perspective three-dimensional view of the hoop limiting part, the U-shaped operating frame and their connection structure in the present invention;

[0034] Figure 7 The second perspective three-dimensional view of the hoop limiting part, the U-shaped operating frame and their connection structure in the present invention;

[0035] Figure 8 The exploded view of the hoop limiting part in the present invention;

[0036] Figure 9 The control flow chart of the intelligent control system in the present invention.

[0037] Among them: <00​​​​​​​First clamping arm - 501; Second clamping arm - 502; Bearing plate - 503; Positioning shaft rod - 504; First positioning pile - 505; Second positioning pile - 506; Cylinder - 507; Arc-shaped through hole - 508; First inner lining plate - 509; Second inner lining plate - 510; Bolt - 511; Thickened stress block - 512;

[0041] Placement rack - 701; Limit vertical groove - 702; C-shaped frame plate - 703; Hydraulic cylinder - 704; Tipping rod - 705; Rack plate - 706; First drive motor - 707; Gear - 708; Torsion sleeve - 709; Limit insertion hole - 710; Limit insertion rod - 711; Limit combination sleeve - 712; Stop pin - 713. Detailed implementation mode

[0042] The present invention will be further described in detail below in conjunction with the attached drawings and specific preferred implementation modes.

[0043] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "left side", "right side", "upper part", "lower part", etc. is based on the orientation or positional relationship shown in the attached drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. "First", "second", etc. do not indicate the importance of the components, so it cannot be understood as a limitation to the present invention. The specific dimensions adopted in this embodiment are only for illustrating the technical solution and do not limit the protection scope of the present invention.

[0044] As Figure 1-8 shown, a device for online disassembly and replacement of a universal shaft includes:

[0045] A U-shaped operation frame 1, including an upper cross beam 101, a lower cross beam 102 and a longitudinal beam 103. The upper cross beam 101 and the lower cross beam 102 are respectively vertically welded at both ends of the longitudinal beam 103. A lifting hook 2 is fixedly connected to the end of the upper cross beam 101, and a plurality of uniformly distributed threaded holes 3 are also opened thereon. A balance hook 4 is detachably installed in the threaded holes 3. Traction steel wires are connected to both the lifting hook 2 and the balance hook 4, which are used to lift the U-shaped operation frame 1, and the operator rises with the U-shaped operation frame 1 to maintain and replace the erected universal shaft;

[0046] A hoop limiting part 5, which is used to tightly hold the end of the universal shaft for maintenance and replacement. The hoop limiting part 5 is installed inside the concave arc opening provided at the end of the lower cross beam 102;

[0047] Placement mechanism 7, used to store the U-shaped operating frame 1 in an idle state and adjust the angle of the U-shaped operating frame 1. It includes a placement frame 701. On both sides of the placement frame 701, through-type limiting vertical grooves 702 are opened. Inside the limiting vertical grooves 702, a C-shaped frame plate 703 is slidably connected. A hydraulic cylinder 704 is fixedly connected to the placement frame 701, and the output end of the hydraulic cylinder 704 is drivingly connected to the C-shaped frame plate 703. Inside the C-shaped frame plate 703, a pick rod 705 is slidably connected. A retaining pin 713 is movably inserted at its end. At the top of the pick rod 705, a rack plate 706 is integrally provided. A first driving motor 707 is fixedly connected to the outside of the C-shaped frame plate 703, and the output shaft of the first driving motor 707 is drivingly connected to a gear 708 that meshes and drives the rack plate 706. In the middle position at the top of the placement frame 701, a torsion sleeve 709 is rotatably connected. A limiting insertion hole 710 is opened through the center of the torsion sleeve 709. Inside it, a limiting insertion rod 711 is movably arranged. In the middle of the outside of the longitudinal beam 103, a limiting combination sleeve 712 is fixedly connected, and a limiting groove matching the limiting insertion rod 711 is opened inside the limiting combination sleeve 712. The torsion sleeve 709 and the limiting insertion rod 711 cooperate to adjust the placement angle of the U-shaped operating frame 1 through a driving mechanism;

[0048] Use multiple pick rods 705 that can be lifted to carry and stably place the U-shaped operating frame 1. After placing the U-shaped operating frame 1 on the pick rods 705, insert the retaining pin 713 into the end of the pick rod 705 to avoid potential safety hazards caused by the U-shaped operating frame 1 slipping. And through the hydraulic cylinder 704, the height of the C-shaped frame plate 703 and the pick rod 705 can be adjusted, thereby adjusting the placement height of the U-shaped operating frame 1. When it needs to be used, it needs to be flipped 90°. Make the side where the hook 2 and the balance hook 4 are located at the top. To meet the flipping condition, the pick rod 705 needs to be raised to the extreme position. At this time, the distance from the bottom end of the U-shaped operating frame 1 to the ground is relatively large, which can reserve space for its flipping. Insert the limiting insertion rod 711 through the limiting insertion hole 710 at the center of the torsion sleeve 709 and insert it into the limiting groove of the limiting combination sleeve 712. In this way, the limiting insertion rod 711 supports and limits the U-shaped operating frame 1. Subsequently, pull out the retaining pin 713, drive the gear 708 through the output shaft of the first driving motor 707, and engage the rack plate 706 to pull the pick rod 705 back to make it脱离接触 with the U-shaped operating frame 1. Use the driving mechanism to make the U-shaped operating frame 1 flip counterclockwise by 90°;

[0049] Furthermore, as a preferred embodiment of the hoop limiting portion 5 in the present invention, it includes a first holding arm 501 and a second holding arm 502. A bearing plate 503 is integrally provided at the middle section position of the concave arc opening of the U-shaped operation frame 1. A positioning shaft rod 504 is fixedly connected to the center of the bearing plate 503. The first holding arm 501 and the second holding arm 502 are respectively rotatably sleeved on the positioning shaft rods 504 on both sides of the bearing plate 503, and the first holding arm 501 and the second holding arm 502 are symmetrically distributed about the center. First positioning piles 505 are provided on both sides of the end of the lower cross beam 102 of the U-shaped operation frame 1. Second positioning piles 506 are provided on the outer sides of the first holding arm 501 and the second holding arm 502. A cylinder 507 is hingedly arranged between the corresponding first positioning pile 505 and the second positioning pile 506 for controlling the opening and closing movement of the first holding arm 501 and the second holding arm 502;

[0050] Specifically, by controlling the telescopic movement of the output end of the cylinder 507, the first holding arm 501 and the second holding arm 502 are pushed or pulled to twist on the positioning shaft rod 504. Thus, during operation, the first holding arm 501 and the second holding arm 502 are first unfolded, and after corresponding to the outside of the shaft body of the universal shaft, they are closed to clamp and limit it.

[0051] Furthermore, in the above technical solution, arc-shaped through holes 508 distributed coaxially are provided on the opposite sides of the first holding arm 501 and the second holding arm 502, and the number of arc-shaped through holes 508 on the first holding arm 501 or the second holding arm 502 is at least one. When the first holding arm 501 and the second holding arm 502 are closed, two relatively arranged arc-shaped through holes 508 form a closed circle, and a protective cushion layer is provided inside the closed circle. The protective cushion layer is made of hard rubber material. The universal shaft is wrapped by the protective cushion layer and a force is applied to it, playing the role of anti-slip and buffer protection.

[0052] Specifically, the protective cushion layer includes a first inner lining plate 509 and a second inner lining plate 510. The arc-shaped outer walls of the first inner lining plate 509 and the second inner lining plate 510 are respectively fitted to the inner sides of the arc-shaped through holes 508 of the first holding arm 501 and the second holding arm 502, and are assembled and installed by bolts 511. Thickened stress blocks 512 are integrally provided at the ends of the first inner lining plate 509 and the second inner lining plate 510, and grooves for accommodating the heads of the bolts 511 are provided thereon. The first inner lining plate 509 and the second inner lining plate 510 are both set as replaceable parts, which is convenient for replacement and maintenance after wear, and can be replaced with first inner lining plates 509 and second inner lining plates 510 with different thicknesses according to the outer diameter of the universal shaft to improve the applicability of the device;

[0053] The first holding arm 501 and the second holding arm 502 are distributed in a staggered manner, and the outer side of the thickened force-bearing block 512 connected to the first holding arm 501 is flush with the outer side of the second holding arm 502, and the outer side of the thickened force-bearing block 512 connected to the second holding arm 502 is flush with the outer side of the first holding arm 501.

[0054] Specifically, the upper cross beam 101, the lower cross beam 102 and the longitudinal beam 103 are all made of I-shaped steel. Areas for foot stepping are reserved on both sides of the I-shaped steel, and multiple groups of reinforcing ribs 6 are welded on both sides of the I-shaped steel to improve the overall strength of the device. Pedal boards 8 are fixedly connected to the outer sides of the first holding arm 501 and the second holding arm 502 to improve the safety and convenience of the operator during work.

[0055] Specifically, safety holes are opened on the I-shaped steel for wearing safety belts. When the operator works on the I-shaped steel, the safety belt needs to be worn to strengthen safety protection. Although directly winding around the outside of the U-shaped operation frame 1 can also provide protection, there may be a problem of the safety belt coming off, and there are still safety hazards. Therefore, the safety holes are reserved to improve the connection reliability of the safety belt and further ensure the safety of the operator.

[0056] Specifically, inner support wedge blocks 9 are welded on the inner sides of the joints between the upper cross beam 101 and the lower cross beam 102 and the longitudinal beam 103, and an anti-slip layer is adhered to the inclined surfaces of the inner support wedge blocks 9. It is made of soft rubber material. Generally, an operator also needs to be equipped with an assistant, so that the assistant can sit on the inner support wedge block 9 at the bottom for auxiliary work to improve comfort and safety.

[0057] Further, as a preferred implementation manner of the driving mechanism in the present invention, it includes a second driving motor 10, which is fixed to the back of the placing rack 701, and the torsion sleeve 709 extends out of the back of the placing rack 701, and an annular chain gear 11 is fixedly connected to the outside thereof. The output shaft of the second driving motor 10 is drivingly connected with a sprocket 12, and a chain 13 for chain drive cooperation is sleeved outside the sprocket 12 and the annular chain gear 11;

[0058] The output shaft of the second driving motor 10 drives the sprocket 12, and the sprocket 12 drives the annular chain gear 11 through the chain 13, further driving the torsion sleeve 709 and the limit insertion rod 711 inside it to rotate 90°, so that the U-shaped operation frame 1 can be adjusted to the required hoisting angle in the working state.

[0059] As Figure 9 shown, a hydraulic mechanism 14 for providing kinetic energy is provided at the connection end of the hydraulic cylinder 704, and a pneumatic mechanism 15 for providing kinetic energy is provided at the connection end of the air cylinder 507;

[0060] A travel switch 16 is installed at the top of the limit vertical groove 702, which cooperates with the C-shaped frame plate 703 to locate the lifting limit position of the U-shaped operating frame 1. When the U-shaped operating frame 1 is in the limit position, the limit insertion hole 710 and the limit groove are coaxially distributed;

[0061] A pressure sensor 17 is installed inside the arc-shaped through hole 508 of the first clamping arm 501 or the second clamping arm 502 to sense the extrusion force of the clamping hoop limiting part 5 on the universal shaft.

[0062] The device for online disassembling and replacing the universal shaft further includes a control panel 18, whose connection end is electrically connected to a single-chip microcomputer 19. The input end and output end of the single-chip microcomputer 19 are respectively electrically connected to an A / D converter and a D / A converter. The travel switch 16 and the pressure sensor 17 are both wirelessly communicatively connected to the A / D converter. The first driving motor 707, the second driving motor 10, the hydraulic mechanism 14 and the pneumatic mechanism 15 are all wirelessly communicatively connected to the D / A converter.

[0063] When the present invention is in use, first place the U-shaped operating frame 1 placed on the placing mechanism 7 in the correct position at the angle required for the working state, and then hoist it. Specifically, by controlling the extension of the output end of the hydraulic cylinder 704, the C-shaped frame plate 703 is lifted with the pick rod 705 to the limit position. Insert the limit insertion rod 711 through the limit insertion hole 710 at the center of the torsion sleeve 709 and insert it into the limit groove of the limit combination sleeve 712. Pull out the retaining pin 713. Drive the gear 708 through the output shaft of the first driving motor 707, and engage the rack plate 706 to pull the pick rod 705 back to make it脱离 contact with the U-shaped operating frame 1. Drive the sprocket 12 through the output shaft of the second driving motor 10. The sprocket 12 drives the annular chain teeth 11 through the chain 13, further driving the torsion sleeve 709 and the limit insertion rod 711 inside it to rotate 90°, so that the lifting hooks 2 and the balance hooks 4 of the U-shaped operating frame 1 are in the top state. Use at least two wire traction ropes on the gantry to be respectively connected to the lifting hooks 2 and the balance hooks 4, so that the U-shaped operating frame 1 can be stably hoisted. Move it slightly outward to make the entire U-shaped operating frame 1 stand up in a stable and vertical posture. The operator and the assistant stand on the U-shaped operating frame 1, do a good job in safety protection, and keep the U-shaped operating frame 1 balanced. Then hoist it to the position of the universal shaft. By controlling the telescopic movement of the output end of the air cylinder 507, push or pull the first clamping arm 501 and the second clamping arm 502 to twist on the positioning shaft rod 504. First, unfold the first clamping arm 501 and the second clamping arm 502, align them with the outside of the shaft body of the universal shaft and then make them合拢, clamp and limit it, hold the universal shaft tightly. Then the operator disassembles the universal shaft and can directly hoist out the universal shaft to achieve replacement.

[0064] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It is apparent to those skilled in the art that various changes, modifications, substitutions, and variations to these embodiments may be made without departing from the principles and spirit of the present invention, and these changes and modifications still fall within the scope of protection of the present invention.

Claims

1. A device for online disassembly and replacement of a universal joint shaft, characterized by: Comprising: A U-shaped operating frame (1), which includes an upper cross beam (101), a lower cross beam (102) and a longitudinal beam (103). The upper cross beam (101) and the lower cross beam (102) are respectively vertically welded to both ends of the longitudinal beam (103). A lifting hook (2) is fixedly connected to the end of the upper cross beam (101), and a number of uniformly distributed threaded holes (3) are opened thereon. A balance hook (4) is detachably installed in the threaded holes (3). The lifting hook (2) and the balance hook (4) are both connected with traction steel wire ropes for lifting the U-shaped operating frame (1); A hoop limiting part (5), which is used to tightly hold the end of the universal shaft for its maintenance and replacement. The hoop limiting part (5) is installed inside the concave arc opening opened at the end of the lower cross beam (102); A placing mechanism (7), which is used to store the U-shaped operating frame (1) in an idle state and adjust the angle of the U-shaped operating frame (1). It includes a placing frame (701). Limiting vertical grooves (702) are penetratedly opened on both sides of the placing frame (701). A C-shaped frame plate (703) is slidably connected inside the limiting vertical grooves (702). A hydraulic cylinder (704) is fixedly connected to the placing frame (701), and the output end of the hydraulic cylinder (704) is传动连接 with the C-shaped frame plate (703). A pick rod (705) is slidably connected inside the C-shaped frame plate (703), and a stop pin (713) is movably inserted at its end. A rack plate (706) is integrally arranged at the top of the pick rod (705). A first driving motor (707) is fixedly connected to the outside of the C-shaped frame plate (703), and a gear (708) meshing with the rack plate (706) is传动连接 to the output shaft of the first driving motor (707). A torsion sleeve (709) is rotatably connected to the middle position at the top of the placing frame (701). A limiting insertion hole (710) is penetratedly opened at the center of the torsion sleeve (709). A limiting insertion rod (711) is movably arranged inside it. A limiting combination sleeve (712) is fixedly connected to the middle part on the outside of the longitudinal beam (103), and a limiting groove matching with the limiting insertion rod (711) is opened inside the limiting combination sleeve (712). The torsion sleeve (709) cooperates with the limiting insertion rod (711) to adjust the placing angle of the U-shaped operating frame (1) through a driving mechanism.

2. The device for online disassembly and replacement of a universal joint according to claim 1, characterized in that: The hoop limiting part (5) includes a first hoop arm (501) and a second hoop arm (502). A bearing plate (503) is integrally provided at the middle section position of the concave arc opening of the U-shaped operation frame (1). A positioning shaft rod (504) is fixedly connected to the center of the bearing plate (503). The first hoop arm (501) and the second hoop arm (502) are respectively rotatably sleeved on the positioning shaft rods (504) on both sides of the bearing plate (503), and the first hoop arm (501) and the second hoop arm (502) are symmetrically distributed about the center. On both sides of the end of the lower cross beam (102) of the U-shaped operation frame (1), first positioning piles (505) are provided. Second positioning piles (506) are provided on the outer sides of the first hoop arm (501) and the second hoop arm (502). A cylinder (507) is hinged between the corresponding first positioning pile (505) and the second positioning pile (506) to control the opening and closing movement of the first hoop arm (501) and the second hoop arm (502).

3. The device for online disassembly and replacement of a universal joint according to claim 2, characterized in that: On the opposite sides of the first hoop arm (501) and the second hoop arm (502), coaxially distributed arc-shaped through holes (508) are provided, and the number of arc-shaped through holes (508) on the first hoop arm (501) or the second hoop arm (502) is at least one. When the first hoop arm (501) and the second hoop arm (502) are closed, two relatively arranged arc-shaped through holes (508) form a closed circle, and a protective cushion layer is provided inside the closed circle. The protective cushion layer is made of hard rubber material.

4. The device for online disassembly and replacement of a universal joint according to claim 3, characterized in that: The protective cushion layer includes a first inner lining plate (509) and a second inner lining plate (510). The arc-shaped outer walls of the first inner lining plate (509) and the second inner lining plate (510) are respectively fitted to the inner sides of the arc-shaped through holes (508) of the first hoop arm (501) and the second hoop arm (502), and are assembled and installed by bolts (511). Thickened stress-bearing blocks (512) are integrally provided at the ends of the first inner lining plate (509) and the second inner lining plate (510), and grooves for accommodating the heads of the bolts (511) are provided thereon; The first hoop arm (501) and the second hoop arm (502) are distributed in a staggered manner, and the outer side surface of the thickened stress-bearing block (512) connected to the first hoop arm (501) is flush with the outer side surface of the second hoop arm (502), and the outer side surface of the thickened stress-bearing block (512) connected to the second hoop arm (502) is flush with the outer side surface of the first hoop arm (501).

5. The device for online disassembly and replacement of a universal joint according to claim 2, characterized in that: The upper cross beam (101), the lower cross beam (102) and the longitudinal beam (103) are all made of I-shaped steel, and multiple groups of reinforcing ribs (6) are welded on both sides of the I-shaped steel. Pedal plates (8) are fixedly connected to the outer sides of the first hoop arm (501) and the second hoop arm (502).

6. The device for online disassembly and replacement of a universal joint according to claim 5, characterized in that: Safety holes are provided on the I-shaped steel for passing through safety belts.

7. The device for online disassembly and replacement of a universal joint according to claim 1, characterized in that: Inner support wedge-shaped blocks (9) are welded on the inner sides of the joints of the upper cross beam (101) and the lower cross beam (102) with the longitudinal beam (103), and an anti-slip layer is adhered to the inclined surface of the inner support wedge-shaped block (9). The anti-slip layer is made of soft rubber material.

8. The device for online disassembly and replacement of a universal joint according to claim 2, characterized in that: The driving mechanism includes a second driving motor (10), which is fixed to the back of the placement rack (701), and the torsion sleeve (709) extends out of the back of the placement rack (701). A ring-shaped chain gear (11) is fixedly connected to the outside thereof. The output shaft of the second driving motor (10) is drivingly connected to a sprocket (12), and a chain (13) for chain drive cooperation is sleeved on the outside of the sprocket (12) and the ring-shaped chain gear (11).

9. The device for online disassembly and replacement of a universal joint according to claim 8, characterized in that: A hydraulic mechanism (14) for providing kinetic energy is arranged at the connection end of the hydraulic cylinder (704), and a pneumatic mechanism (15) for providing kinetic energy is arranged at the connection end of the air cylinder (507); A travel switch (16) is installed at the top of the limiting vertical groove (702). It cooperates with the C-shaped frame plate (703) to locate the lifting limit position of the U-shaped operating frame (1). When the U-shaped operating frame (1) is in the limit position, the limiting insertion hole (710) and the limiting groove are coaxially distributed; A pressure sensor (17) is installed inside the arc-shaped through hole (508) of the first holding arm (501) or the second holding arm (502) to sense the extrusion force of the hoop limiting part (5) on the universal shaft.

10. The device for online disassembly and replacement of a universal joint according to claim 9, characterized in that: It further includes a control panel (18), whose connection end is electrically connected to a single-chip microcomputer (19). The input end and the output end of the single-chip microcomputer (19) are respectively electrically connected to an A / D converter and a D / A converter. The travel switch (16) and the pressure sensor (17) are both wirelessly communicatively connected to the A / D converter. The first driving motor (707), the second driving motor (10), the hydraulic mechanism (14) and the pneumatic mechanism (15) are all wirelessly communicatively connected to the D / A converter.

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