Online oil replacement device and method for universal joint shaft

Abstract

The application discloses an online oil bag replacing device and method for a universal joint axle, which belongs to the technical field of oil bag replacing for a universal joint axle.The device comprises a fixing part, a driving part and a clamping part.The fixing part comprises a plurality of positioning clamping plates which are sequentially arranged and connected along the circumferential direction and which are axially fixedly connected with the universal joint axle.The driving part comprises a plurality of traction rotating shafts which are uniformly distributed on the positioning clamping plates.The clamping part comprises a fixed clamping plate and a movable clamping plate, and the clamping part can be fixedly connected with the end of the oil bag through clamping.The traction rope is connected with the traction rotating shaft at one end and connected with the fixed clamping plate at the other end.The electric dragging mode is adopted, the traction rope is axially moved through the rotation of the traction rotating shaft, the oil bag is axially pulled into place, the automatic pulling operation of the oil bag is realized, the labor intensity is reduced, the oil bag replacing period is shortened, and the working environment is improved.

Description

Technical Field

[0001] This invention relates to the field of oil reservoir replacement technology for universal joints, and specifically to an online oil reservoir replacement device and method for universal joints. Background Technology

[0002] The maintenance load in the steel rolling area of ​​the bar mill is relatively high. The core equipment in the steel rolling area mainly consists of two primary rolling mills. The main drive device of the rolling mill consists of five parts: universal joint shaft, universal joint shaft balancing device, universal joint shaft semi-circular slider lubrication device, universal joint shaft axial displacement device, and universal joint shaft height positioning device.

[0003] The main motor transmits torque to the rolls via an intermediate connecting shaft and a slider-type universal joint. The universal joint consists of a joint shaft, a large fork head, a small fork head, and a copper slider. The joint shaft and the large fork head are connected by a heat-fitted interference fit. The copper slider is installed inside the small fork head. The end that mates with the roll side is the small fork head, and the end that mates with the motor side is the large fork head.

[0004] The copper sliders of the large and small forks of the universal joint use different lubrication methods. At the large fork end, the copper slider uses a thin oil spray lubrication method; at the small fork end, the copper slider uses a closed-loop automatic grease lubrication method. However, due to the high temperature and large impact force of the rollers connected to the small fork, the lubrication effect of the small fork is not good.

[0005] To optimize the equipment, a new lubrication method has emerged where the small fork head is lubricated by sealing a thin oil in an oil pack (hereinafter referred to as oil pack lubrication). The oil pack is made of oil-impregnated rubber, which provides lubrication to the small fork head, thereby achieving a lubrication effect that meets the equipment's operational needs.

[0006] In actual production, the specifications of the oil pack are as follows: diameter 1300mm, axial length 1000mm, and weight 35kg. There are two main types of oil pack lubrication structures. The first is an open oil pack structure, where oil-resistant rubber is rolled into a cylindrical shape and fitted onto the connection between the universal joint shaft and the roll, then tightened with a steel hoop. Because of the open structure, the oil pack is easy to replace, but it also has disadvantages such as poor sealing and a short replacement cycle, typically 30-45 days. The second type is an integral oil pack structure, where the cylindrical oil-resistant rubber is directly fitted onto the connection between the universal joint shaft and the roll, then tightened with a steel hoop. This integral oil pack structure offers good sealing and a longer replacement cycle, typically 60 days, but it is less convenient for oil pack replacement.

[0007] For integral oil tank structures, destructive removal can be used when dismantling the oil tank. This involves slightly heating it with an acetylene flame until the rubber becomes brittle, then manually removing the old oil tank and placing it in the designated position. When installing the oil tank, the roller and the connecting shaft must first be disassembled. Then, a sleeve is placed on the roller through the small fork of the universal joint, and the oil tank is then inserted into the sleeve. The roller and the connecting shaft are then connected, and finally, the operator uses a vise to clamp the end of the oil tank and pulls it axially into place. However, due to the large amount of grease on the oil tank, it is prone to slipping during pulling. Furthermore, when working on the oil tank on the upper universal joint, the operator standing on the lower universal joint is prone to slipping and falling, posing a safety hazard. Summary of the Invention

[0008] In view of this, the purpose of the present invention is to provide an online oil pack replacement device for universal joint shafts, so as to solve the technical problems of easy slippage and easy tipping of existing manual oil packs.

[0009] The technical solution adopted in this invention is: an online oil tank replacement device for universal joint shafts, used to move the oil tank along the axial direction of the universal joint shaft, comprising:

[0010] The fixing part includes a positioning clamp, and a plurality of the positioning clamps are arranged and connected in sequence along the circumferential direction so that the fixing part can be axially fixedly connected to the universal joint shaft.

[0011] The drive unit includes a traction shaft, and a plurality of traction shafts are circumferentially distributed on the positioning clamping plate;

[0012] The clamping part includes a fixed clamping plate and a movable clamping plate, the distance between the fixed clamping plate and the movable clamping plate being adjustable so that the clamping part can be clamped and fixedly connected to the end of the oil bag;

[0013] A traction rope, one end of which is connected to a traction shaft and the other end of which is connected to a fixed clamping plate, so that the oil tank can be moved along the axial direction by the rotation of the traction shaft.

[0014] Preferably, the fixing part further includes a connecting plate and a connecting bolt, the number of connecting plates being equal to the number of positioning clamps; both ends of the positioning clamps are provided with axial threaded holes, both ends of the connecting plates are provided with axial through holes corresponding to the axial threaded holes, and the connecting bolts pass through the axial through holes and are threaded into the axial threaded holes.

[0015] Preferably, the number of positioning clamps is 2 to 4.

[0016] Preferably, the fixing part further includes connecting bolts and clamping nuts, the number of positioning clamps is 2, and radial through holes are provided at both ends of the positioning clamps. The connecting bolts are disposed in the radial through holes and are threadedly connected to the clamping nuts.

[0017] Preferably, the traction shafts are arranged one-to-one on the positioning clamps and are arranged radially.

[0018] Preferably, the drive unit further includes a drive motor, a U-shaped fixing frame, and a reinforcing column. The U-shaped fixing frame is fixedly mounted on the positioning clamp, the traction shaft is rotatably mounted on the U-shaped fixing frame and is connected to the drive motor for transmission, and the reinforcing column is fixedly connected to the opening position of the U-shaped fixing frame.

[0019] Preferably, the movable clamping plate includes a first straight section, a bent connecting section, and a second straight section connected in sequence. The bent connecting section is rotatably connected to the middle of the fixed clamping plate, and the second straight section is provided with a threaded hole. An adjusting bolt is threaded into the threaded hole, and the bottom end of the adjusting bolt abuts against the fixed clamping plate so as to adjust the distance between the second straight section and the fixed clamping plate by screwing the adjusting bolt in and out of the threaded hole.

[0020] Preferably, one end of the traction rope is provided with a locking hook, and the fixed clamp plate is provided with a locking buckle that cooperates with the locking hook.

[0021] Another object of the present invention is to provide a method for online replacement of oil reservoir for universal joints, wherein the method uses the above-mentioned online replacement device for oil reservoir for universal joints, and the method includes the following steps:

[0022] S10: The roll and the universal joint are axially separated by axially moving the universal joint.

[0023] S20: Fit one end of the oil bag onto the end of the roll;

[0024] S30: The roll and the universal joint are connected by axial movement.

[0025] S40: Connect and fix multiple positioning clamps sequentially along the circumferential direction on the universal joint shaft, and fix the clamping part to the end of the oil bag;

[0026] S50: By rotating the traction shaft, the length of the traction rope in the direction of the universal joint axis is adjusted, and the oil bag is moved axially into place.

[0027] Preferably, S20 specifically includes: fitting 1 / 2 to 2 / 3 of the axial length of the oil bag onto the sleeve at the end of the roll.

[0028] The beneficial effects of this invention are:

[0029] This invention employs an electric towing method, axially fixing the fixed part, which has a split structure, onto a universal joint shaft, and clamping the part onto the end of the oil tank. A circumferentially distributed traction rope connects the clamping part to the traction shaft on the fixed part. The rotation of the traction shaft drives the traction rope to move axially, realizing the automated pulling operation of the oil tank and pulling the oil tank into place along the axial direction. This reduces the intensity of manual labor, shortens the oil tank replacement cycle, and improves the working environment for manual workers. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the online oil reservoir replacement device for the universal joint shaft of the present invention;

[0031] Figure 2 This is an isometric view of the fixed part;

[0032] Figure 3 This is the front view of the positioning clamp;

[0033] Figure 4 This is an isometric view of the connecting plate;

[0034] Figure 5 This is the front view of the fixed part;

[0035] Figure 6 This is a three-dimensional schematic diagram of the clamping part;

[0036] Figure 7 This is a three-dimensional schematic diagram of the drive unit;

[0037] Figure 8 This is a reference diagram showing the usage status of the universal joint shaft oil filler online replacement device of the present invention;

[0038] Figure 9 This is a schematic diagram of an oil-lubricated structure.

[0039] Explanation of the reference numerals in the figure:

[0040] 100. Fixing part;

[0041] 110. Positioning clamp; 120. Connecting plate; 130. Connecting bolt; 140. Clamping nut;

[0042] 111. Axial threaded hole; 113. Arc-shaped groove; 114. First through hole; 121. Axial through hole;

[0043] 200. Drive unit;

[0044] 210. Traction shaft; 220. Drive motor; 230. U-shaped fixing bracket; 240. Reinforcing column; 250. Second through hole;

[0045] 300. Clamping part;

[0046] 310. Fixed clamping plate; 320. Moving clamping plate; 330. Adjusting bolt; 340. Hinge shaft;

[0047] 311. Lock; 321. First straight section; 322. Bending connection section; 323. Second straight section;

[0048] 400. Towing rope;

[0049] 410. Locking hook;

[0050] 500, universal joint;

[0051] 510, Connecting shaft; 520, Connecting shaft fork head;

[0052] 600, oil packet;

[0053] 700. Rolls;

[0054] 710. Roll shaft; 720. Roll shoulder; 730. Sleeve. Detailed Implementation

[0055] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. These embodiments are for illustrative purposes only and are not intended to limit the scope of the invention.

[0056] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0057] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0058] Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0059] Examples, such as Figures 1-8 As shown, an online oil reservoir replacement device for a universal joint shaft is used to move the oil reservoir 600 along the axial direction of the universal joint shaft 500; the device includes:

[0060] The fixing part 100 includes a positioning clamp 110. Multiple positioning clamps 110 are arranged sequentially along the circumferential direction and are detachably connected so that the fixing part 100 can be axially fixedly connected to the universal joint shaft 500.

[0061] The drive unit 200 includes a traction shaft 210, a plurality of traction shafts 210 are evenly distributed on the positioning clamp 110, and the traction shafts 210 can rotate along their own axis.

[0062] The clamping part 300 includes a fixed clamping plate 310 and a movable clamping plate 320, and the distance between the fixed clamping plate 310 and the movable clamping plate 320 is adjustable so that the clamping part 300 can be clamped and fixedly connected to the end of the oil bag 600.

[0063] The traction rope 400 has one end connected to the traction shaft 210 and the other end connected to the fixed clamping plate 310, so that the oil tank 600 can be moved along the axial direction by the rotation of the traction shaft 210.

[0064] This application employs an electric towing method. First, the fixed part 100, which has a split structure, is axially fixed to the universal joint shaft 500. Then, the clamping part 300 is clamped and fixed to the end of the oil tank 600. The clamping part 300 is fixedly connected to the traction shaft 210 on the fixed part 100 by the circumferentially distributed traction rope 400. The rotation of the traction shaft 210 can drive the traction rope 400 to move axially. With the traction rope 400 pulling the oil tank 600, the oil tank 600 is automatically pulled into place, thereby reducing the intensity of manual labor, shortening the oil tank replacement cycle, and improving the working environment.

[0065] In one specific embodiment, such as Figure 1 , Figure 3 , Figure 4 and Figure 5As shown, the fixing part 100 includes a positioning clamp 110, a connecting plate 120, and a connecting bolt 130. The positioning clamp 110 has an arc-shaped groove 113. Multiple positioning clamps 110 are connected sequentially along the circumferential direction to form a receiving hole that matches the connecting shaft 510. The number of connecting plates 120 is equal to the number of positioning clamps 110, and they are arranged one-to-one at the connection position of adjacent positioning clamps 110. Axial threaded holes 111 are provided on both sides of the arc-shaped groove 113 of the positioning clamp 110. The connecting plate 120 is an arc-shaped plate, and both ends of the arc-shaped plate have axial through holes 121 that mate with the axial threaded holes 111. The connecting bolt 130 passes through the axial through holes 121 and is threaded into the axial threaded holes 111 to fix adjacent positioning clamps 110 together.

[0066] This design is because when the oil tank 600 is pulled electrically, the fixing part 100 needs to be fixed to the connecting shaft 510 first. In this embodiment, a split design is adopted, with multiple positioning clamps 110 connected end to end in a ring, which facilitates the fitting of the fixing part 100 onto the connecting shaft 510. The connecting plate 120 and the connecting bolt 130 are threaded to the ends of the positioning clamps 110, which not only provides sufficient connection strength but also allows for quick and easy fixing of two adjacent positioning clamps 110. At the same time, the axial connection (the connecting bolt 130 is installed along the axial direction of the oil tank 600) allows for the fixing of three or four positioning clamps 110.

[0067] Preferably, the number of positioning clamps 110 is 2, 3 or 4, and the radial dimension of the positioning clamps 110 is larger than the radial dimension of the connecting shaft fork head 520. The driving part 200 is arranged on the positioning clamps 110 at a position away from the axis.

[0068] This design is because, when pulling the oil reservoir 600, the more uniform the force on the oil reservoir 600 in the circumferential direction, the easier it is to pull the oil reservoir 600. In this embodiment, multiple driving parts 200 are evenly distributed circumferentially on the fixing part 100. Each driving part 200 applies an axial force to the oil reservoir 600 through the traction rope 400, which makes the force on the oil reservoir 600 uniform, so as to facilitate the axial movement of the oil reservoir 600.

[0069] More preferably, a first through hole 114 is provided on the positioning clamping plate 110 at a position corresponding to the drive unit 200 for axial movement of the traction rope 400. This is because: by providing the first through hole 114 on the positioning clamping plate 110, the traction rope 400 passes through the first through hole 114 and connects to the oil tank 600, which allows the direction of the force exerted by the traction rope 400 on the oil tank 600 to have a small angle with the axial direction, which is beneficial for pulling the oil tank 600 to move.

[0070] In one specific embodiment, such as Figure 2 As shown, the fixing part 100 includes a positioning clamp 110, a connecting bolt 130, and a clamping nut 140. There are two positioning clamps 110, and an arc-shaped groove 113 is provided on the side of the two positioning clamps 110 that are close to each other. After the two positioning clamps 110 are connected, the two arc-shaped grooves 113 form a receiving hole for accommodating the connecting shaft 510. Radial through holes are provided on both sides of the positioning clamps 110 of the arc-shaped groove 113. The connecting bolt 130 is disposed in the radial through holes, and the clamping nut 140 is threadedly connected to the connecting bolt 130 so that the two positioning clamps 110 are radially fixedly connected.

[0071] This is because: by using a radial connection (the connecting bolts 130 are installed radially along the oil tank 600), the connection structure of two adjacent positioning clamps 110 can be simplified, making it easier to quickly connect the two positioning clamps 110.

[0072] In one specific embodiment, such as Figure 1 , Figure 7 As shown, the traction shafts 210 are arranged one-to-one on the positioning clamps 110, and the fixing parts 100 are arranged radially. This arrangement is because: by arranging the traction shafts 210 radially along the fixing parts 100, the end of each positioning clamp 110 that makes up the fixing part 100 away from the axis can have a smaller size, thereby reducing the weight of the positioning clamp 110 and facilitating manual operation.

[0073] Preferably, the drive unit 200 includes a traction shaft 210, a drive motor 220, a U-shaped fixing frame 230, and a reinforcing column 240. The U-shaped fixing frame 230 is fixedly mounted on the positioning clamp 110 with its opening facing upward. The traction shaft 210 is disposed inside the U-shaped fixing frame 230, and both ends of the traction shaft 210 are rotatably connected to the U-shaped fixing frame 230. The drive motor 220 is fixedly mounted on one side of the U-shaped fixing frame 230 and is drively connected to one end of the traction shaft 210. The reinforcing column 240 is fixedly connected to the opening of the U-shaped fixing frame 230 to strengthen the structural strength of the U-shaped fixing frame 230 and prevent the traction rope 400 from tangling or knotting.

[0074] Preferably, the U-shaped fixing bracket 230 and the connecting plate 120 are fixedly connected to the same side of the positioning clamp 110, and the other side of the positioning clamp 110 is a positioning surface for abutting against the end face of the connecting shaft fork head 520; and the U-shaped fixing bracket 230 is provided with a second through hole 250 that cooperates with the first through hole 114.

[0075] The maximum traction force applied by the drive motor 220 to the traction rope 400 is 2000N, and the maximum traction stroke of the traction rope 400 is 5m.

[0076] In one specific embodiment, such as Figure 1 , Figure 6 As shown, the fixed clamping plate 310 is a flat plate; the movable clamping plate 320 includes a first flat part 321, a bent connecting part 322, and a second flat part 323 connected in sequence. The bent connecting part 322 is rotatably connected to the middle part of the fixed clamping plate 310 via a hinge shaft 340. The first flat part 321 and the second flat part 323 are arranged parallel to the fixed clamping plate 310, and the distance between the first flat part 321 and the fixed clamping plate 310 is greater than the distance between the second flat part 323 and the fixed clamping plate 310. A threaded through hole is provided on the first flat part 321, and an adjusting bolt 330 is threadedly connected to the threaded through hole. The bottom end of the adjusting bolt 330 abuts against the fixed clamping plate 310, so that the distance between the second flat part and the fixed clamping plate 310 can be adjusted by screwing the adjusting bolt 330 into and out of the threaded through hole, thereby realizing the clamping and fixing connection between the clamping part 300 and the end of the oil tank 600.

[0077] This is because the fixed clamping plate 310 and the movable clamping plate 320 are hinged. By adjusting the distance between the first straight part 321 of the movable clamping plate 320 and the fixed clamping plate 310, the distance between the second straight part 323 of the movable clamping plate 320 and the fixed clamping plate 310 can be adjusted, while ensuring that the fixed clamping plate 310 remains fixed, thereby ensuring the clamping and fixing effect of the clamping part 300 on the oil bag 600.

[0078] In one specific embodiment, such as Figure 1 As shown, one end of the traction rope 400 is provided with a locking hook 410, and the fixed clamping plate 310 is provided with a locking buckle 311 that cooperates with the locking hook 410. This is because: through the cooperation of the locking hook 410 and the locking buckle 311, the traction rope 400 and the clamping part 300 can be quickly and securely connected.

[0079] Preferably, the traction rope 400 is made of steel strand.

[0080] An embodiment provides a method for online replacement of the oil reservoir for a universal joint, using the aforementioned online replacement device for the oil reservoir of a universal joint. The method includes the following steps:

[0081] Before use, check that the wiring of the power control box is intact and undamaged, the traction rope 400 is not tangled, the drive unit 200 is securely fixed, and the power supply is plugged in.

[0082] S10: The roll 700 and the universal joint 500 are axially separated by axially moving the universal joint 500.

[0083] S20: First, put the sleeve 730 from the universal joint 500 at the joint fork 520 onto the roll shoulder 720 of the roll 700, and then put 1 / 2 to 2 / 3 of the axial length of the oil tank 600 onto the sleeve 730 at the end of the roll 700.

[0084] S30: The roll 700 and the universal joint 500 are connected by axial movement of the universal joint 500; wherein, 1 / 4 to 1 / 3 of the axial length of the oil tank 600 can be directly sleeved on the sleeve 730 at the end of the roll 700.

[0085] S40: First, place multiple positioning clamps 110 on the universal joint shaft 500 along the circumferential direction, and tighten the connecting plate 120 and connecting bolt 130; then extend the traction rope 400 axially to the oil tank 600, and tighten the adjusting bolt 330 to clamp and fix the clamping part 300 to the end of the oil tank 600.

[0086] S50: Adjust the fixing part 100 and the traction rope 400 to a vertical position, control the drive motor 220 to drive the traction shaft 210 to rotate, and make the traction rope 400 wrap around the traction shaft 210 through rotation, so as to realize the movement of the traction rope 400 in the axial direction of the universal joint shaft 500, and gradually make the oil tank 600 move axially by 1 / 4 to 1 / 3, so that the oil tank 600 moves axially into place.

[0087] S60: Inspect the installation quality of oil tank 600. If it is qualified, disassemble and replace the device, clean it thoroughly, and place it in the designated location.

[0088] Compared with the prior art, this application has at least the following beneficial technical effects:

[0089] The online oil replacement device and method in this application optimize the construction method, which not only reduces unnecessary construction procedures, thereby reducing maintenance time and improving the maintenance efficiency of the oil pack, but also reduces unnecessary construction, lowers the risk during operation, and eliminates unnecessary safety hazards when replacing the oil pack.

[0090] The online oil replacement device and method described in this application can effectively improve the construction quality. Compared with the manual pulling of the oil tank, it has certain technical advantages in all aspects. This technology has the value of being promoted in the maintenance of similar equipment at home and abroad.

[0091] The online oil replacement method described in this application effectively improves labor efficiency. Previously, manually pulling the oil bag required 8 workers and took 4 hours to maintain. With the new method, only 4 workers are needed, a reduction of 4 personnel; the maintenance time is reduced to 2 hours, a reduction of 2 hours. Furthermore, the workspace is larger, eliminating the need for multiple people to work in confined spaces, thus improving safety.

[0092] The online oil replacement device in this application can ensure that maintenance is completed on schedule, safeguard the unit, and win a good reputation for the unit. This technology has a great advantage in our unit's maintenance of similar projects.

[0093] The online oil replacement device and method in this application transforms the original completely manual operation into electric tooling, achieving rapid and safe replacement of oil bags. This application can also achieve the replacement of oil bags of various specifications by changing the positioning clamp and determining the motor power.

[0094] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. An online oil reservoir replacement device for a universal joint shaft, used to move the oil reservoir (600) along the axial direction of the universal joint shaft (500), characterized in that, include: The fixing part (100) includes a positioning clamp (110), and a plurality of positioning clamps (110) are arranged and connected in sequence along the circumferential direction so that the fixing part (100) and the universal joint shaft (500) can be axially fixedly connected. The drive unit (200) includes a traction shaft (210), and a plurality of traction shafts (210) are evenly distributed on the positioning clamp (110); The clamping part (300) includes a fixed clamping plate (310) and a movable clamping plate (320). The distance between the fixed clamping plate (310) and the movable clamping plate (320) is adjustable so that the clamping part (300) can be clamped and fixedly connected to the end of the oil bag (600). The traction rope (400) has one end connected to the traction shaft (210) and the other end connected to the fixed clamp plate (310) so that the oil bag (600) can be moved along the axial direction by the rotation of the traction shaft (210).

2. The online oil reservoir replacement device for a universal joint shaft according to claim 1, characterized in that, The fixing part (100) also includes a connecting plate (120) and a connecting bolt (130). The number of connecting plates (120) is equal to the number of positioning clamps (110). Both ends of the positioning clamps (110) are provided with axial threaded holes (111). Both ends of the connecting plates (120) are provided with axial through holes (121) corresponding to the axial threaded holes (111). The connecting bolt (130) passes through the axial through holes (121) and is threaded into the axial threaded holes (111).

3. The online oil reservoir replacement device for a universal joint shaft according to claim 2, characterized in that, The number of positioning clamps (110) is 2 to 4.

4. The online oil reservoir replacement device for a universal joint shaft according to claim 1, characterized in that, The fixing part (100) also includes a connecting bolt (130) and a clamping nut (140). There are two positioning plates (110), and radial through holes are provided at both ends of the positioning plates (110). The connecting bolt (130) is disposed in the radial through hole and threadedly connected to the clamping nut (140).

5. The online oil reservoir replacement device for a universal joint shaft according to claim 1, characterized in that, The traction shafts (210) are arranged one-to-one on the positioning clamps (110) and are arranged radially.

6. The online oil reservoir replacement device for a universal joint shaft according to claim 5, characterized in that, The drive unit (200) also includes a drive motor (220), a U-shaped fixing frame (230) and a reinforcing column (240). The U-shaped fixing frame (230) is fixedly mounted on the positioning clamp (110). The traction shaft (210) is rotatably mounted on the U-shaped fixing frame (230) and is connected to the drive motor (220) for transmission. The reinforcing column (240) is fixedly connected to the opening position of the U-shaped fixing frame (230).

7. The online oil reservoir replacement device for a universal joint shaft according to claim 1, characterized in that, The movable clamping plate (320) includes a first straight part (321), a bent connecting part (322), and a second straight part (323) connected in sequence. The bent connecting part (322) is rotatably connected to the middle part of the fixed clamping plate (310). The first straight part (323) is provided with a threaded hole. An adjusting bolt (330) is threadedly connected in the threaded hole. The bottom end of the adjusting bolt (330) abuts against the fixed clamping plate (310) so as to adjust the distance between the second straight part and the fixed clamping plate (310) by screwing the adjusting bolt (330) in and out of the threaded hole.

8. The online oil reservoir replacement device for a universal joint shaft according to claim 7, characterized in that, One end of the traction rope (400) is provided with a locking hook (410), and the fixed clamp plate (310) is provided with a locking buckle (311) that cooperates with the locking hook (410).

9. A method for online replacement of an oil reservoir for a universal joint, wherein the method uses the online replacement device for an oil reservoir for a universal joint as described in any one of claims 1-8, characterized in that, The method includes the following steps: S10: The roll (700) and the universal joint (500) are axially separated by axially moving the universal joint (500); S20: Place one end of the oil bag (600) onto the end of the roll (700); S30: The roll (700) and the universal joint (500) are connected by axial movement of the universal joint (500); S40: Connect and fix multiple positioning clamps (110) sequentially along the circumferential direction to the universal joint shaft (500), and fix the clamping part (300) to the end of the oil bag (600); S50: By rotating the traction shaft (210), the length of the traction rope (400) in the axial direction of the universal joint shaft (500) is adjusted, and the oil bag (600) is moved axially into place.

10. A method for online replacement of the oil bag for a universal joint shaft according to claim 9, characterized in that, S20 specifically includes: fitting 1 / 2 to 2 / 3 of the axial length of the oil bag (600) onto the sleeve (730) at the end of the roll (700).

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