A front and rear drive transfer case assembly

Abstract

The application belongs to the technical field of mechanical transmission, and particularly relates to a front-rear driving transfer case assembly, which comprises a box body, a shift fork one is arranged on an input shaft, a push plate one bottom is provided with a screw rod, the storage box one is externally provided with a rotating sleeve which is threadedly connected with the screw rod, a blowdown pipe is arranged in the screw rod, the blowdown pipe inside is exposed by the downward movement of the push plate one, so that the leakage of oil can be checked to check whether the oil is deteriorated, the downward movement of the push plate one drives the communication pipe to move downward synchronously, and the bottom compression air charging member is compressed first, after the communication pipe and the cleaning member are separated from the restriction of the sleeve assembly, the gas enters to make the cleaning member inflate and straighten, at this time, the cleaning member is opened and can be attached to the internal gear or the box body inner wall, and the protrusion on the communication pipe is embedded into the fixing member and moves along the annular groove when the push plate one continues to move downward, the annular groove drives the protrusion to rotate, thereby driving the entire communication pipe and the cleaning member to rotate, so that the simple and small cleaning effect is achieved.

Description

Technical Field

[0001] This invention discloses a transfer case, and more particularly relates to a front-to-rear drive transfer case assembly. Background Technology

[0002] A transfer case is a device that distributes engine power, sending power to the rear axle or simultaneously to both the front and rear axles. From this perspective, the transfer case is essentially a component of a four-wheel drive vehicle. With the development of four-wheel drive technology, transfer cases have continuously evolved, gradually forming distinct styles to suit different four-wheel drive vehicles with varying requirements. While their basic function remains the same, their underlying principles may differ slightly.

[0003] The internal transmission of a transfer case typically uses gears or chains. Regardless of the method, dedicated lubricating oil is required. This lubricating oil serves functions such as lubricating gears, heat dissipation, and rust prevention. Regular inspection and replacement are necessary to ensure the proper operation of the transmission components. However, the transfer case is fixed by multiple bolts and nuts, making disassembly and inspection inconvenient. Therefore, existing technologies store a certain amount of oil in the transfer case to ensure lubrication and good heat dissipation and rust prevention. The continuous rotation of the gear transmission components continuously drives the oil, ensuring each gear is coated with oil, thus achieving good lubrication, heat dissipation, and rust prevention. However, with prolonged use and exposure to constant rotation, dust and impurities can easily enter the transfer case. Over time, this leads to wear and tear on the internal gears and accelerates oil deterioration, affecting subsequent lubrication and heat dissipation. Therefore, regular cleaning and oil replacement are still necessary. However, existing technologies for oil replacement and cleaning are inconvenient. Therefore, this application proposes an alternative solution that makes cleaning the transfer case and replacing the oil more convenient. Summary of the Invention

[0004] The purpose of this invention is to provide a front-to-rear drive transfer case assembly to solve the above-mentioned problems.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a front-to-rear drive transfer case assembly, comprising a housing, the housing including a power input shaft and a power output shaft, a transmission shaft I between the input shaft and the output shaft I, an output shaft II between the transmission shaft I and the output shaft I, a gear I on the input shaft, a transmission shaft II rotatably connected inside the housing, a gear II and a gear III on the transmission shaft II, a gear IV meshing with the gear III on the transmission shaft II, a shift fork I on the input shaft, and a shift fork II on the output shaft I, an extension box at the bottom of the housing, the extension box being interconnected with the housing. The expansion box is divided into storage box one and storage box two. Storage box one and storage box two respectively store oil and cleaning fluid for cleaning the box body. Storage box one and storage box two are respectively provided with push plate one and push plate two for pushing the oil and cleaning fluid upward. In normal state, push plate one is flush with the top of storage box two. Push plate one is provided with a screw at the bottom. Storage box one is provided with a rotating sleeve threadedly connected to the screw. The rotating sleeve is rotatably connected to storage box one. The screw is hollow and has a drain pipe inside. The drain pipe has a drain port on the side and the drain port is in close contact with the inner wall of the screw. The drain pipe is provided with a sealing plate one at the top.

[0006] The push plate is provided with a connecting pipe. The connecting pipe is fitted with a cleaning component for cleaning and scraping impurities inside the box. The cleaning component is made of rubber. The connecting pipe is rotatably connected to the push plate. The connecting pipe is provided with an exhaust hole that communicates with the cleaning component and is used for air discharge. The box is provided with a kit to accommodate the connecting pipe and the embedded cleaning component. The push plate is provided with a compression inflation component connected to the connecting pipe at the lower end of the connecting pipe.

[0007] Preferably, the storage box is provided with a fixing member at the connecting pipe, and the fixing member is sleeved on the outside of the connecting pipe. The fixing member is provided with an annular groove. The connecting pipe is provided with a number of protrusions that are embedded in the annular groove and pushed to rotate by the annular groove. The number of protrusions are symmetrically arranged on the left and right, and the annular groove pushes the protrusions to rotate only half a turn. The bottom of the compression inflation component is provided with a support plate, and the support plate is slidably connected to the storage box. A compression spring is provided between the bottom of the support plate and the storage box.

[0008] Preferably, a sealing plate for sealing the storage box is rotatably connected to one side of the storage box, a torsion spring is provided between the sealing plate and the storage box, and a pulling member that abuts against the push plate is slidably connected to one side of the storage box located on the sealing plate. A pull rope is connected between the pulling member and the sealing plate.

[0009] Preferably, the drain pipe is detachably connected to a squeezing component for pushing the oil in and sealing the drain outlet, and the squeezing component is threadedly connected to the drain pipe. The push plate is provided with a sealing plate two for sealing the hollow part of the screw at the screw rod.

[0010] Preferably, a spring is provided between the second push plate and the second storage box, and a sealing plate is provided on the top of the second storage box for closing the second storage box. The sealing plate is rotatably connected to the second storage box, and a limiting component is provided outside the second storage box and the first storage box to limit the sealing plate and the second push plate.

[0011] Preferably, the limiting component includes a torsion spring 2 disposed between the sealing plate 2 and the storage box 2. The sealing plate 2 is driven to close the storage box 2 by the elastic force of the torsion spring 2. A rotating wheel is rotatably connected to the bottom of the storage box 2. A limiting member is provided inside the rotating wheel. The limiting member is fixedly connected to the storage box 2 and rotatably connected to the rotating wheel. A transmission wheel is rotatably connected inside the limiting member, and the transmission wheel meshes with the teeth inside the rotating wheel. A bevel gear 1 is engaged on the transmission wheel. A bevel gear 2 that meshes with bevel gear 1 is rotatably connected laterally inside the limiting member. A rotating rod is provided between bevel gear 2 and the limiting member, and the rotating rod is engaged with bevel gear 2. A connecting rope 1 and a connecting rope 2 are wound on the rotating rod, and the connecting rope 1 and the connecting rope 2 are respectively connected to the sealing plate 2 and the push plate 2. The connecting rope 1 passes through the push plate 2 and is connected to the rotating rod. A support tube for wrapping the connecting rope 1 is provided outside the storage box 2.

[0012] Preferably, the first and second connecting ropes are connected to the rotating rod in opposite directions and are also wound in opposite directions. The elastic force of the first spring is greater than the weight of the cleaning fluid in the storage tank, and the elastic force of the first spring is less than the pulling force of the rotating rod during winding.

[0013] Preferably, the rotating sleeve is provided with teeth, and the storage box one and storage box two are slidably connected to a flexible rack that meshes with the teeth on the rotating sleeve. The rack is arranged in a circle around the rotating wheel and the rotating sleeve. The flexible rack has teeth at the rotating sleeve. The storage box two is provided with a retainer outside the rotating wheel to restrict the rotation of the rotating wheel. A spring two is provided between the retainer and the storage box two, and the retainer is slidably connected to the storage box two. The retainer and the rack are staggered vertically. The upper end of the teeth on the rack near the rotating wheel is provided with an abutment block one for pushing the retainer to move and disengage from the rotating wheel.

[0014] Preferably, the storage box 1 and the storage box 2 are provided with interconnected conduits, with one end of the conduit in the storage box 2 being lower than one end in the storage box 1. A baffle plate for sealing the conduit is slidably connected inside the storage box 1. A spring 3 is provided between the baffle plate and the storage box 1. A stop block 2 is provided on the sealing plate 1, which abuts against and is embedded in the baffle plate. Both the stop block 2 and the baffle plate are magnetic. A fourth spring is provided between the stop block 2 and the sealing plate 1. The baffle plate is provided with a slot for accommodating the embedded stop block 2, and the elastic force of the spring 3 is less than the elastic force of the fourth spring.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] Firstly, under normal use, the push plate 1 is flush with the top of the storage tank 2, while the sealing plate 2 seals the storage tank 2. Oil from the storage tank 1 is pushed into the storage tank, and the rotation of the input shaft drives the internal gears, allowing the gears to contact the oil and become oil-lubricated, thus lubricating the internal transmission. However, after prolonged use, during inspection, rotating the rotating sleeve moves the threaded screw, causing the screw to move the push plate downwards, and the oil also flows down into the storage tank 1. The downward movement of the push plate exposes the drain pipe inside the screw, allowing the oil to leak out and be checked for any changes. When the push plate moves down, it causes the connecting tube to move down synchronously, compressing the bottom air-inflating component first. At the same time, after the connecting tube and the cleaning component are released from the restraint of the kit, gas enters and inflates the cleaning component, making it taut. At this time, the cleaning component can be stretched and fit against the internal gear or the inner wall of the box. As the push plate continues to move down, the protrusion on the connecting tube will be embedded in the fixing component and move along the annular groove. It is pushed and rotated by the annular groove, thereby driving the entire connecting tube and the cleaning component to rotate. This causes the cleaning component to scrape the impurities at the contact position, thus achieving a simple and small amount of cleaning effect. With this setting, a slight automatic cleaning can be achieved during inspection, reducing the adhesion of some impurities.

[0017] Secondly, when the rotating sleeve rotates, it will also cause the sealing plate 2 inside the storage component 2 to open, and cause the push plate 2 to move upward. This causes the bottom push plate 2 to push upward, and under the push of the bottom spring 1, the cleaning fluid in the storage tank 2 will flow into the tank body. It will come into contact with the internal impurities, and the scraping of the cleaning component will loosen the impurities. It will also make the adhering impurities easy to slide off automatically and flow into the storage tank 2, thereby achieving a better cleaning effect. With the above settings, it can be automatically cleaned during regular inspections, extending the service life of the inner wall parts and the inside of the tank body. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a front-to-rear drive transfer case assembly;

[0019] Figure 2 This is a schematic diagram of the internal structure of a front-to-rear drive transfer case assembly;

[0020] Figure 3 This is a partial structural schematic diagram of a front-to-rear drive transfer case assembly;

[0021] Figure 4 This is a schematic diagram of the internal structure of a front-to-rear drive transfer case assembly expansion box;

[0022] Figure 5 A schematic diagram of a partial structure of a front-to-rear drive transfer case assembly expansion box. Figure 1 ;

[0023] Figure 6 A schematic diagram of a partial structure of a front-to-rear drive transfer case assembly expansion box. Figure 2 ;

[0024] Figure 7 for Figure 6 A magnified view of a portion at point A;

[0025] Figure 8 for Figure 6 A magnified view of the area at point B;

[0026] Figure 9 A schematic diagram of a partial structure of a front-to-rear drive transfer case assembly expansion box. Figure 3 ;

[0027] Figure 10 This is a schematic diagram of the internal planar structure of a front-to-rear drive transfer case assembly expansion box.

[0028] Reference numerals: 1. Housing; 2. Input shaft; 3. Output shaft one; 4. Output shaft two; 5. Expansion box; 6. Storage box one; 7. Storage box two; 8. Push plate one; 9. Push plate two; 10. Screw; 11. Rotating sleeve; 12. Drain pipe; 13. Drain port; 14. Sealing plate one; 15. Connecting pipe; 16. Cleaning component; 17. Exhaust port; 18. Kit; 19. Compression inflation component; 20. Fixing component; 21. Annular groove; 22. Protrusion; 23. Support plate; 24. Compression spring; 25. Sealing plate one; 26. Torsion spring one; 2 7. Pulling component; 28. Pull rope; 29. ​​Pressing component; 30. Enclosing plate II; 31. Spring I; 32. Sealing plate II; 33. Torsion spring II; 34. Rotating wheel; 35. Limiting component; 36. Transmission wheel; 37. Bevel gear I; 38. Bevel gear II; 39. Rotating rod; 40. Connecting rope I; 41. Connecting rope II; 42. Support tube; 43. Rack; 44. Clamping component; 45. Spring II; 46. Abutting block I; 47. Conducting pipe; 48. Blocking plate; 49. Spring III; 50. Abutting block II; 51. Fourth spring; 52. Slot. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. In this description, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "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 only for the convenience of describing the present invention and 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 present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] A front-to-rear drive transfer case assembly, such as Figures 1-10As shown, the device includes a housing 1, which includes a power input shaft 2 and a power output shaft 3. A transmission shaft 1 is located between the input shaft 2 and the output shaft 3, and an output shaft 4 is located between the transmission shaft 1 and the output shaft 3. A first gear is mounted on the input shaft 2. The second transmission shaft 2 is rotatably connected inside the housing 1, and it has a second gear and a third gear. A fourth gear meshes with the third gear on the second transmission shaft 2. A shift fork 1 is mounted on the input shaft 2, and a shift fork 2 is mounted on the output shaft 3. Under normal use, the input shaft 2 is connected to a power component such as an engine or motor, which drives the input shaft 2 to rotate, causing the input shaft 2 to pass through the first gear, the second gear, and the output shaft 3. The conversion between the third and fourth gears transmits power, and the speed is changed by altering the gear ratio. Furthermore, by adjusting shift forks one and two, the power outputs of output shaft 3 and output shaft 4 can be switched, or both output shafts 3 and 4 can be driven simultaneously. Over time, the internal oil deteriorates, and debris and dust adhering to the meshing gears affect transmission, potentially causing slippage or other issues. Current technology typically involves periodically changing the oil and cleaning it using high pressure or sonic vibration combined with a specialized cleaning fluid. This cleaning is usually performed during the scheduled oil change, as per standard intervals. The bottom of the housing 1 is equipped with an expansion box 5, which is interconnected with the housing 1. The expansion box 5 is divided into a first storage box 6 and a second storage box 7. The first storage box 6 and the second storage box 7 respectively store oil and cleaning fluid for cleaning the housing 1. The first storage box 6 and the second storage box 7 are respectively equipped with a first push plate 8 and a second push plate 9 to push the oil and cleaning fluid upward. The bottom of the first push plate 8 is equipped with a screw 10. The outside of the first storage box 6 is equipped with a rotating sleeve 11 that is threadedly connected to the screw 10, and the rotating sleeve 11 is rotatably connected to the first storage box 6. The screw 10 is hollow and is equipped with a drain pipe 12. The drain pipe 12 has a drain port 13 on its side. Furthermore, the drain outlet 13 is tightly attached to the inner wall of the screw 10, and the top of the drain pipe 12 is provided with a sealing plate 14. After long-term use, the device of this application rotates the rotating sleeve 11 outside the storage box 6, which drives the threaded screw 10 to move. The screw 10 is driven outward through thread engagement. Because the screw 10 is fixedly connected to the push plate 8, and the push plate 8 can only slide, the push plate 8 and the screw 10 will move down synchronously. Because the push plate 8 is normally flush with the top of the storage box 7, the oil at the top of the push plate 8 will decrease in height after moving down and enter the storage box 6, detaching from the internal gears.

[0031] The push plate 8 is provided with a connecting pipe 15. The connecting pipe 15 is covered with a cleaning component 16 for cleaning and scraping impurities inside the box 1. The cleaning component 16 is made of rubber. The connecting pipe 15 is rotatably connected to the push plate 8. The connecting pipe 15 is provided with an exhaust hole 17 that is connected to the cleaning component 16 and is used for air discharge. The box 1 is provided with a kit 18 that accommodates the connecting pipe 15 and the cleaning component 16. The push plate 8 is provided with a compression inflation component 19 connected to the connecting pipe 15 at the lower end of the connecting pipe 15. Storage box 6 is provided with a fixing member 20 at the connecting pipe 15, and the fixing member 20 is sleeved on the outside of the connecting pipe 15. The fixing member 20 is provided with an annular groove 21. The connecting pipe 15 is provided with several protrusions 22 that are embedded in the annular groove 21 and are pushed to rotate by the annular groove 21. The several protrusions 22 are arranged symmetrically on the left and right, and the annular groove 21 pushes the protrusions 22 to rotate only half a turn. The bottom of the compression inflation member 19 is provided with a support plate 23, and the support plate 23 is slidably connected to the storage box 6. A compression spring 24 is provided between the bottom of the support plate 23 and the storage box 6. Subsequently, the downward-moving push plate 8 pulls the connected connecting pipe 15 downwards simultaneously. The connecting pipe 15 drives the connected rubber cleaning component 16 downwards together, freeing it from the restraint of the kit 18. The cleaning component 16 unfolds. At the same time, due to the large force of the compression spring 24, the downward-moving push plate 8 first compresses the compression inflation component 19, causing the internal gas to be compressed and rush into the connecting pipe 15. It then rushes into the cleaning component 16 along the exhaust hole 17 on the connecting pipe 15. Through inflation, the cleaning component 16 unfolds and tightens. The cleaning extension with a cleaning extension on the surface of the cleaning component 16 will stand up and straighten after inflation. Because of the rubber material, the outer ring is straightened and stands up, increasing the friction after contacting the inside of the housing 1 and the gears. During the downward movement, the compression inflation component 19 is fully compressed and adheres to the support plate 23. The push plate 8 continues to move downwards, driving the support plate 23 downwards simultaneously and compressing the compression spring 24. This setting ensures that the compression inflation component 19 is fully compressed during the downward movement. First, compress and tighten the cleaning component 16. Then, continue to move downwards so that the protrusion 22 on the connecting pipe 15 moves to the fixing component 20 and is embedded in the annular groove 21 on the fixing component 20. Under the fixation of the fixing component 20 and the push of the inner wall of the annular groove 21, the protrusion 22 drives the connecting pipe 15 and the cleaning component 16 to rotate synchronously. Since the protrusion 22 is set at intervals on the left, right, up, and down, after rotating half a turn, the protrusion 22 on the other side is aligned with the annular groove 21 again. As it continues to move downwards, it will continue to rotate, causing the cleaning component 16 to rotate continuously after moving downwards. This scrapes the inner wall of the box 1 and the gears that are in contact with it, thereby reducing the adhesion of some impurities inside and achieving a simple cleaning effect. This allows the impurities to loosen and fall off. With the above settings, as long as the pushing plate 8 moves downwards, it can ensure that the cleaning component 16 unfolds and is inflated and tightened first before rotating and cleaning. It will not rotate first and then slowly inflate, resulting in a situation where it is fully inflated and tightened only after the movement is completed.

[0032] A sealing plate 25 for sealing the storage box 6 is rotatably connected to the side of the storage box 6. A torsion spring 26 is provided between the sealing plate 25 and the storage box 6. A pulling member 27 that abuts against the push plate 8 is slidably connected to the storage box 6 on one side of the sealing plate 25. A pull rope 28 is connected between the pulling member 27 and the sealing plate 25. Secondly, the downward-moving push plate 8 will simultaneously drive the pull member 27 and pull the pull rope 28, causing the pull rope 28 to pull the sealing plate 25 downward. Since the sealing plate 25 can only rotate, it rotates along the rotation point and compresses the internal torsion spring 26, thereby simultaneously sealing the storage tank 6 and reducing the entry of impurities into the oil. Although some impurities will still enter, some can be blocked. At the same time, the sealing plate 25 has a hole at its edge that is about the same size as the connecting pipe 15 to accommodate it, so as to avoid being blocked by the connecting pipe 15. There is a sealing strip between the sealing plate 25 and the connecting pipe 15. When the sealing plate 25 is pulled downward, it abuts against the connecting pipe 15. Due to the tension, the connecting pipe 15 is squeezed into the hole of the sealing plate 25, thereby reducing the leakage of oil through the sealing strip. The drain pipe 12 is detachably connected to a pressing component 29 for pushing the oil in and sealing the drain outlet 13. The pressing component 29 is threadedly connected to the drain pipe 12. The push plate 18 is located at the screw 10 and is equipped with a sealing plate 20 for sealing the hollow part of the screw 10. After the sealing plate 25 seals, the push plate 18 moves to the corresponding position, at which point the internal drain pipe 12 is exposed and higher than the surface of the push plate 18. Thus, the internal oil can be drained by simply removing the pressing component 29. Check if it is severely deteriorated or has too many impurities and needs to be replaced. If replacement is needed, drain all the oil and discharge it along the drain outlet 13 on the side of the drain pipe 12. If not, reverse the rotating sleeve 11 to reset it, causing the internal push plate 18 to move upward and reset, and release the pull rope 28, so that the torsion spring 26 pushes the sealing plate. When the 25 is reset, the internal structure correspondingly resets the connecting pipe 15, causing the cleaning component 16 to re-embed into the kit 18. At this time, the pushing plate 8 is higher than the drain pipe 12 and closes the drain port 13 through the inner wall. Then, the oil is extracted by the oil extraction tool and moved upward along the drain pipe 12 through the pipe, opening the sealing plate 30 and continuing to move upward along the hollow screw 10 to the sealing plate 14. The sealing plate 14 is opened to add oil. After the oil is added, the pipe only needs to be pulled out. The sealing plate 14 and the sealing plate 30 are automatically pushed and closed by the internal torsion spring, so that the oil will not leak. The drain pipe 12 is provided with a connecting block that connects to the storage box 6. The screw 10 is provided with a groove to accommodate the movement of the connecting block of the drain pipe 12. This ensures that it can be threadedly connected to the outer rotating sleeve 11 and also ensures that the internal drain pipe 12 can be fixed without restricting the movement of the screw 10.

[0033] A spring 31 is provided between the push plate 29 and the storage box 27. A sealing plate 32 for closing the storage box 27 is provided on the top of the storage box 27. The sealing plate 32 is rotatably connected to the storage box 27. A limiting assembly is provided outside the storage box 27 and the storage box 16 to restrict the sealing plate 32 and the push plate 29. The limiting assembly includes a torsion spring 33 disposed between the sealing plate 22 and the storage box 27. The sealing plate 232 is driven to close the storage box 27 by the elastic force of the torsion spring 33. A rotating wheel 34 is rotatably connected to the bottom of the storage box 27. A limiting member 35 is provided inside the rotating wheel 34. The limiting member 35 is fixedly connected to the storage box 27 and rotatably connected to the rotating wheel 34. A transmission wheel 36 is rotatably connected inside the limiting member 35, and the transmission wheel 36 meshes with the teeth inside the rotating wheel 34. A bevel gear 37 is engaged on the transmission wheel 36. A bevel gear 38, which meshes with bevel gear 37, is laterally rotatably connected to the inner bevel gear 37. A rotating rod 39 is provided between bevel gear 38 and the limiting member 35, and the rotating rod 39 is engaged with bevel gear 38. Connecting rope 40 and connecting rope 41 are wound on the rotating rod 39, and connecting rope 40 and connecting rope 41 are respectively connected to sealing plate 32 and push plate 9. Connecting rope 40 passes through push plate 9 and connects to the rotating rod 39. A support tube 42 is provided outside the connecting rope 40 to wrap the connecting rope 40. The connecting rope 40 and connecting rope 41 are connected to the rotating rod 39 in opposite directions and are wound in opposite directions. The elastic force of spring 31 is greater than the weight of the cleaning fluid in the storage tank 7, and the elastic force of spring 31 is less than the tension of the rotating rod 39 during winding.The rotating sleeve 11 has teeth on its outer surface. A flexible rack 43, which meshes with the teeth on the outer surface of storage tank 6 and storage tank 7, is slidably connected to the outside of the rotating sleeve 11. The rack 43 forms a circle around the rotating wheel 34 and the rotating sleeve 11. The flexible rack 43 has teeth at the location on the rotating sleeve 11. When the rotating sleeve 11 rotates, it drives the flexible rack 43, which is meshed on the outer ring, to move. The toothed section of the rack 43 meshes with the rotating sleeve 11, thus causing the rotating sleeve 11 to rotate and drive the rack 43 to move backward. After the sealing plate 25 is closed, the rack 43 meshes with the rotating wheel 34, driving the rotating wheel 34 to rotate the internally meshing transmission wheel 36. The transmission wheel 36 coaxially drives the bevel gear 37 to rotate, which in turn drives the meshing bevel gear 38 to rotate, causing the engaged rotating rod 39 to rotate. The rotating rod 39 pulls the winding connecting rope 40, causing the connecting rope 40 to open the connected sealing plate 32. Rotating the sleeve cancels the winding of the connecting rope 41 and the restraint on the push plate 9. At this time, the spring 31 at the bottom of the push plate 9 will directly push the push plate 9 upward to reset. Due to the large elastic force of the spring 31, the cleaning fluid in the storage tank 7 can flow upward into the tank 1, and the inside can come into contact with the cleaning fluid. The impurities in contact with the cleaning fluid react and automatically slide down into the storage tank 7. With this setting, when there is no need to completely replace the oil, the rotation of the rotating sleeve 11 can achieve the effect of sealing the oil and automatic cleaning. There is no need to disassemble the whole or remove the oil first. Just rotating the rotating sleeve 11 can automatically separate the oil, and the automatic flow of cleaning fluid and the movement of the cleaning part 16 can make the impurities fall off better, thus achieving automatic cleaning. Although the cleaning is simple, it can reduce the accumulation of internal impurities, reduce the error and mode of gear meshing, reduce wear and increase the service life of the overall device. Therefore, before the need for major maintenance and repair, this method of simple cleaning increases the service life and is more convenient and faster.

[0034] Storage box 2 7 is equipped with a retainer 44 outside the rotating wheel 34 to restrict the rotation of the rotating wheel 34. A spring 2 45 is provided between the retainer 44 and storage box 2 7, and the retainer 44 is slidably connected to storage box 2 7. The retainer 44 and rack 43 are vertically offset. The upper end of the teeth on the rack 43 near the rotating wheel 34 is provided with an abutment block 1 46 for pushing the retainer 44 to move and disengage from the rotating wheel 34. When the rack 43 moves, it is supported by storage box 1 6 and storage box 2 7, thus ensuring that the rack 43 can move without loosening. Simultaneously, because the rotating wheel 34 is relatively wide and the rack 43 does not completely cover it, when the toothed part of the rack 43 contacts the rotating wheel 34, the abutment block 1 46 first abuts against the retainer 44, pushing the retainer 44 backward to release the restriction on the rotating wheel 34 and compressing the internal spring 2 45. As the flexible rack 43 continues to move backward, it meshes with the rotating wheel 34 and drives its rotation. The rotating wheel 34 rotates, and under normal conditions, the locking piece 44 is embedded in the teeth between the rotating wheels 34, restricting the rotation of the rotating wheel 34 and preventing it from rotating arbitrarily. It also prevents the internal spring 31 from having too much elasticity, which would pull the push plate 9 upward and cause the rotating rod 39 to rotate. Secondly, the connecting rope 40 is provided with a support tube 42, which ensures that the connecting rope 40 is isolated from the cleaning fluid, and also prevents leakage. It also prevents the cleaning fluid from tilting the movement of the connecting rope 40. The isolation also facilitates the upward movement of the push plate 9, and makes it slide more smoothly along the outside of the support tube 42.

[0035] Storage box 1 6 and storage box 2 7 are provided with a connecting pipe 47. One end of the connecting pipe 47 is lower than one end of the storage box 1 6. A baffle plate 48 for sealing the connecting pipe 47 is slidably connected inside the storage box 1 6. A spring 3 49 is provided between the baffle plate 48 and the storage box 1 6. A second abutment block 2 50 is provided on the sealing plate 1 25, which abuts against and is embedded in the baffle plate 48. Both the second abutment block 2 50 and the baffle plate 48 are magnetic. A fourth spring 51 is provided between the second abutment block 2 50 and the sealing plate 1 25. A slot 52 is provided on the baffle plate 48 to accommodate the embedded second abutment block 2 50. The elastic force of the third spring 49 is less than the elastic force of the fourth spring 51. Finally, after the rotating sleeve 11 rotates, the sealing plate 25 rotates horizontally, and the upper abutment block 50 moves to the position where it fits against the baffle plate 48 and is opposite to the slot 52. At this time, it is pushed into the slot 52 by the spring 4, and they are attracted to each other by magnetic force. The elastic force of the spring 3 49 is less than that of the spring 4. As it continues to move downward, the abutment block 50 pulls the baffle plate 48 downward, exposing the conduction pipe 47. This makes the storage tank 7 and the storage tank 6 connected at the upper end of the sealing plate 25. In this state, the push plate 2 9 moves upward, pushing the cleaning fluid into the tank 1. When it flows downward, some of the cleaning fluid carrying impurities will enter the storage tank 6 and flow to the sealing plate 25, preventing it from mixing with the subsequent oil. The cleaning fluid and impurities can be discharged through the inclined conduction pipe 47. Finally, multiple of the above devices can be set according to their size and connected by electrical control or gear transmission, so that multiple racks 43 can be driven simultaneously to ensure that driving one achieves the effect of synchronous opening.

[0036] If there are no abnormalities in the oil, there is no need to disassemble the extrusion part 29. The cleaning part 16 can be driven to rotate and scrape away impurities by rotating the rotating sleeve 11. The push plate 29 is released from restraint and is quickly pushed up by the spring 131, which forcefully pushes the cleaning fluid into the box 1. The cleaning fluid that quickly flows into the box 1 comes into contact with several gears inside. The chemical substances contained in the cleaning fluid react with the impurities attached inside, so that the impurities can be directly removed. If the oil needs to be replaced, it can be cleaned in the normal way. Conversely, after a simple cleaning without any abnormalities, by reversing the rotating sleeve 11, the rack 43 moves back to its original position and the abutment block 46 cancels the push on the locking piece 44, causing the rack 43 to drive the rotating wheel 34 to reset. This also pulls the connecting rope 41 of the push plate 9 to rewind, and cancels the pull rope 28 of the connecting rope 40. This causes the torsion spring 33 inside the sealing plate 32 to push the sealing plate 32 back to its original position. Simultaneously, the rack 43 resets, abutting the abutment block 46, and the locking piece 44 is pushed by the spring 45 to re-embed the reset rotating wheel 34. Inside, the rotating wheel 34 is restricted, and the lower sealing plate 25 is pushed open by the torsion spring 26 as it continues to move. At the same time, the oil is pushed back into the housing 1 by the push plate 8 and contacts the internal gears. With the above settings, during simple testing, the oil can be extracted by rotating the rotating sleeve 11, and it can be separated from the internal gears and other mechanisms for simple cleaning. The backup cleaning fluid can also be controlled for cleaning, so that the cleaning can be automatically performed during the testing process, reducing internal impurities, improving the smoothness of transmission, reducing wear, and increasing service life.

[0037] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0038] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A front-to-rear drive transfer case assembly, comprising a housing (1), the housing (1) comprising a power input shaft (2) and a power output shaft (3), a transmission shaft (1) being provided between the input shaft (2) and the output shaft (3), an output shaft (4) being provided between the transmission shaft (1) and the output shaft (3), a gear (1) being provided on the input shaft (2), a transmission shaft (2) being rotatably connected inside the housing (1), a gear (2) and a gear (3) being provided on the transmission shaft (2), a gear (4) being provided on the transmission shaft (2) and meshing with the gear (3), a shift fork (1) being provided on the input shaft (2), and a shift fork (2) being provided on the output shaft (1), characterized in that: The bottom of the box (1) is provided with an expansion box (5), which is connected to the box (1). The expansion box (5) is divided into a storage box one (6) and a storage box two. The storage box one (6) and the storage box two (7) respectively store oil and cleaning fluid for cleaning the box (1). The storage box one (6) and the storage box two (7) are respectively provided with a push plate one (8) and a push plate two (9) to push the oil and cleaning fluid upward. Under normal conditions, the push plate one (8) is aligned with the top of the storage box two (7). The push plate (8) is flush with the bottom of the push plate (8) and the storage box (6) is provided with a rotating sleeve (11) that is threadedly connected to the screw (10). The rotating sleeve (11) is rotatably connected to the storage box (6). The screw (10) is hollow. The screw (10) is provided with a drain pipe (12). The drain pipe (12) is provided with a drain port (13) on the side. The drain port (13) is in close contact with the inner wall of the screw (10). The drain pipe (12) is provided with a sealing plate (14) at the top. The push plate (8) is provided with a connecting pipe (15). The connecting pipe (15) is covered with a cleaning component (16) for cleaning and scraping impurities inside the box (1). The cleaning component (16) is made of rubber. The connecting pipe (15) is rotatably connected to the push plate (8). The connecting pipe (15) is provided with an exhaust hole (17) that is connected to the cleaning component (16) and is used for air discharge. The box (1) is provided with a kit (18) that accommodates the connecting pipe (15) and the cleaning component (16). The push plate (8) is provided with a compression inflation component (19) connected to the connecting pipe (15) at the lower end of the connecting pipe (15).

2. The front-to-rear drive transfer case assembly according to claim 1, characterized in that: The storage box (6) is provided with a fixing member (20) at the connecting pipe (15), and the fixing member (20) is sleeved on the outside of the connecting pipe (15). The fixing member (20) is provided with an annular groove (21). The connecting pipe (15) is provided with a number of protrusions (22) that are embedded in the annular groove (21) and pushed to rotate by the annular groove (21). The number of protrusions (22) are symmetrically arranged on the left and right, and the annular groove (21) pushes the protrusions (22) to rotate only half a turn. The bottom of the compression inflation member (19) is provided with a support plate (23), and the support plate (23) is slidably connected to the storage box (6). A compression spring (24) is provided between the bottom of the support plate (23) and the storage box (6).

3. The front-to-rear drive transfer case assembly according to claim 2, characterized in that: The storage box (6) is rotatably connected to a sealing plate (25) for sealing the storage box (6). A torsion spring (26) is provided between the sealing plate (25) and the storage box (6). The storage box (6) is slidably connected to a pulling member (27) that abuts against the push plate (8) on one side of the sealing plate (25). A pull rope (28) is connected between the pulling member (27) and the sealing plate (25).

4. The front-to-rear drive transfer case assembly according to claim 1, characterized in that: The drain pipe (12) is detachably connected to a pressing member (29) for pushing the oil in and sealing the drain outlet (13), and the pressing member (29) is threadedly connected to the drain pipe (12). The first pushing plate (8) is located at the screw (10) and is provided with a second sealing plate (30) for sealing the hollow part of the screw (10).

5. A front-to-rear drive transfer case assembly according to claim 3, characterized in that: A spring (31) is provided between the second push plate (9) and the second storage box (7). The top of the second storage box (7) is provided with a sealing plate (32) for sealing the second storage box (7). The sealing plate (32) is rotatably connected to the second storage box (7). The second storage box (7) and the first storage box (6) are provided with a limiting component that restricts the sealing plate (32) and the second push plate (9).

6. A front-to-rear drive transfer case assembly according to claim 5, characterized in that: The limiting component includes a torsion spring 2 (33) disposed between the sealing plate 2 (32) and the storage box 2 (7). The sealing plate 2 (32) drives the storage box 2 (7) to close by the elastic force of the torsion spring 2 (33). A rotating wheel (34) is rotatably connected to the bottom of the storage box 2 (7). A limiting member (35) is provided inside the rotating wheel (34). The limiting member (35) is fixedly connected to the storage box 2 (7) and rotatably connected to the rotating wheel (34). A transmission wheel (36) is rotatably connected inside the limiting member (35), and the transmission wheel (36) meshes with the teeth inside the rotating wheel (34). A bevel gear 1 (37) is engaged on the transmission wheel (36). (35) is rotatably connected to a bevel gear two (38) that meshes with bevel gear one (37). A rotating rod (39) is provided between the bevel gear two (38) and the limiting member (35), and the rotating rod (39) is engaged with the bevel gear two (38). A connecting rope one (40) and a connecting rope two (41) are wound on the rotating rod (39), and the connecting rope one (40) and the connecting rope two (41) are respectively connected to the sealing plate two (32) and the push plate two (9). The connecting rope one (40) passes through the push plate two (9) and is connected to the rotating rod (39). The storage box two (7) is located outside the connecting rope one (40) and is provided with a support tube (42) that wraps the connecting rope one (40).

7. A front-to-rear drive transfer case assembly according to claim 6, characterized in that: The connecting rope one (40) and connecting rope two (41) are connected in opposite directions to the rotating rod (39) and are also wound in opposite directions. The elastic force of the spring one (31) is greater than the weight of the cleaning liquid in the storage tank two (7), and the elastic force of the spring one (31) is less than the pulling force of the rotating rod (39) during winding.

8. A front-to-rear drive transfer case assembly according to claim 6, characterized in that: The rotating sleeve (11) is provided with teeth on the outside. The storage box one (6) and the storage box two (7) are slidably connected with flexible racks (43) that mesh with the teeth on the rotating sleeve (11). The racks (43) are arranged in a circle around the rotating wheel (34) and the rotating sleeve (11). The flexible racks (43) are provided with teeth at the rotating sleeve (11). The storage box two (7) is provided with a retainer (44) outside the rotating wheel (34) to restrict the rotation of the rotating wheel (34). A spring two (45) is provided between the retainer (44) and the storage box two (7). The retainer (44) is slidably connected to the storage box two (7). The retainer (44) and the rack (43) are staggered vertically. The upper end of the teeth on the rack (43) near the rotating wheel (34) is provided with an abutment block one (46) for pushing the retainer (44) to move and disengage from the rotating wheel (34).

9. A front-to-rear drive transfer case assembly according to claim 6, characterized in that: Storage box 1 (6) and storage box 2 (7) are provided with a connecting pipe (47) that is connected to each other. The connecting pipe (47) is located at one end of storage box 2 (7) and lower than one end of storage box 1 (6). A baffle plate (48) for closing the connecting pipe (47) is slidably connected inside storage box 1 (6). A spring 3 (49) is provided between the baffle plate (48) and storage box 1 (6). A second abutting block (50) is provided on sealing plate 1 (25) that abuts against and is embedded in the baffle plate (48). Both the second abutting block (50) and the baffle plate (48) are magnetic. A fourth spring (51) is provided between the second abutting block (50) and sealing plate 1 (25). A slot (52) is provided on the baffle plate (48) to accommodate the embedded second abutting block (50). The elastic force of spring 3 (49) is less than the elastic force of the fourth spring (51).

Images