An excavator transmission box

Abstract

This application discloses an excavator transmission box, relating to the technical field of transmission boxes, including a box body; a main input shaft; a first output shaft connected to and coaxially arranged with the main input shaft; a second output shaft rotatably connected to the box body and perpendicular to the main input shaft; the box body is provided with a transmission assembly; a power belt; the power belt is provided with multiple cleaning bristles extending into a receiving groove, the cleaning bristles being slidably connected to the bottom wall of the receiving groove; an oil injection pipe is provided on the side wall of the box body, an oil outlet pipe is provided at the bottom of the box body, and the box body is provided with an opening and closing assembly; a mounting block is provided on the outer wall of the oil injection pipe, the mounting block having an installation groove, the mounting block being rotatably connected to a rotating shaft perpendicular to the oil injection pipe, power blades being evenly spaced circumferentially along the outer periphery of the rotating shaft, the power blades extending into the oil injection pipe; and a control assembly disposed in the box body, which controls the reciprocating sliding of the power belt when the rotating shaft rotates. This application can reduce the composite deposit layer at the bottom of the box body during oil changes.

Description

Technical Field

[0001] This application relates to the technical field of transmission boxes, and in particular to an excavator transmission box. Background Technology

[0002] As a key power transmission hub in the power transmission system of construction machinery, the excavator's transmission box plays an important role in efficiently distributing the engine's output power to the traveling mechanism, slewing mechanism, and working device.

[0003] Currently, the lubrication and maintenance of transmission systems generally adopts an immersion lubrication scheme, which involves quantitatively injecting grease into the transmission housing cavity to reduce the coefficient of friction by covering the contact surfaces of moving parts with an oil film. While this traditional lubrication method can maintain basic lubrication needs under normal operating conditions, its technical limitations are gradually becoming apparent in equipment operating under complex conditions and over long periods. Specifically, typical operating environments for construction machinery generally exhibit high concentrations of suspended particulate matter. Furthermore, the progressive wear of transmission components under alternating loads inevitably leads to two major contaminants intruding into the lubrication system: firstly, external environmental dust that migrates through sealed gaps; and secondly, metal abrasive particles generated on the surface materials of moving parts due to tribological action. After long-term thermodynamic interaction with the grease, these two types of contaminants easily form a highly adhesive composite deposit layer at the bottom of the housing.

[0004] More importantly, traditional oil change processes are ineffective at removing such dense deposits during periodic lubrication maintenance. These residual deposits face the risk of secondary re-suspension during subsequent equipment operation, especially during transmission system startup or under sudden load changes, where they may detach from the substrate and enter the friction pair interface. This three-body abrasive wear mechanism leads to accelerated wear on the contact surfaces, creating a vicious cycle of tribological degradation and ultimately causing premature transmission system failure. Summary of the Invention

[0005] In order to reduce the composite deposit layer at the bottom of the gearbox during oil changes, this application provides an excavator transmission gearbox.

[0006] This application provides a transmission box for an excavator, which adopts the following technical solution:

[0007] An excavator transmission box includes a box body, wherein a receiving groove is provided inside the box body;

[0008] The main input shaft is rotatably connected to the housing;

[0009] The first output shaft is rotatably connected to the housing, and the first output shaft is connected to and coaxially arranged with the main input shaft;

[0010] The second output shaft is rotatably connected to the housing and perpendicular to the main input shaft. The housing is provided with a transmission assembly that connects the main input shaft and the second output shaft.

[0011] A power belt is connected end to end and slidably connected to the inner wall of the box, and the power belt surrounds the receiving groove;

[0012] The power belt is provided with a plurality of cleaning bristles that extend into the receiving groove at even intervals, and the cleaning bristles are slidably connected to the bottom wall of the receiving groove.

[0013] An oil injection pipe connected to the receiving groove is provided on the side wall of the box, and an oil outlet pipe connected to the receiving groove is provided at the bottom of the box. The box is provided with an opening and closing assembly for controlling the opening and closing of the oil injection pipe and the oil outlet pipe.

[0014] An installation block is provided on the outer wall of the oil injection pipe. The installation block has an installation groove that communicates with the oil injection pipe. The installation block is rotatably connected to a rotating shaft that is perpendicular to the oil injection pipe. Power blades are evenly spaced along the circumferential side of the rotating shaft and extend into the oil injection pipe.

[0015] A control component is disposed in the housing. When the rotating shaft rotates, the control component controls the power belt to slide back and forth.

[0016] By adopting the above technical solution, the excavator transmission box achieves efficient power transmission through a reasonable shaft layout and transmission components. When the lubricating grease in the box needs to be replaced, the lubricating grease in the receiving groove is first drained, and at the same time, flushing oil is injected to flush the box, reducing the amount of sediment in the receiving groove. During the flushing process, the power belt and cleaning brushes effectively remove the sediment in the receiving groove, reducing damage to the transmission system. After flushing, the oil outlet pipe is first blocked by the opening and closing component, and then new lubricating grease is injected. After injection, the oil inlet pipe is then blocked by the opening and closing component. Compared with traditional excavator transmission boxes, this design reduces the composite deposit layer at the bottom of the box during oil changes, reduces wear on the transmission system, extends the service life of the transmission box, and improves the excavator's working efficiency and reliability.

[0017] Optionally, the control assembly includes a control helical gear, a power helical gear, a control shaft, a control block, a toggle shaft, and a toggle spring;

[0018] The control helical gear is disposed on the outer periphery of the rotating shaft, the control shaft is rotatably connected to the side wall of the housing, the power helical gear is disposed on the outer periphery of the control shaft, and the control helical gear meshes with the power helical gear;

[0019] The actuating shaft is located on the outer periphery of the control shaft and is slidably connected to the inner side wall of the housing; the control block is located on the inner wall of the power belt.

[0020] When the control shaft rotates, the actuating shaft slides on the control block;

[0021] The toggle spring is located inside the side wall of the housing. When the toggle shaft moves away from the control block, the toggle spring drives the control block to reset.

[0022] By adopting the above technical solution, the rotation of the rotating shaft can be transmitted to the control shaft through the meshing transmission of the control helical gear and the power helical gear. When the control shaft rotates, it causes the actuating shaft to slide the control block. Combined with the actuating spring, the control block is reset, thereby controlling the power belt to slide back and forth. This allows the cleaning brush to continuously clean the bottom wall of the receiving tank, effectively reducing the accumulation of composite deposits, reducing the possibility of residual deposits entering the friction pair interface and causing three-body abrasive wear, reducing the possibility of early failure of the transmission system, and improving the service life and stability of the excavator transmission box.

[0023] Optionally, the opening and closing assembly includes an opening and closing tube, an opening and closing block, and a support shaft;

[0024] The opening and closing pipe is threaded to the outer wall of the oil injection pipe and the oil outlet pipe. The opening and closing block is disposed inside the opening and closing pipe. The two ends of the support shaft are respectively connected to the inner wall of the opening and closing pipe and the outer peripheral side wall of the opening and closing block. The opening and closing block blocks the opening of the oil injection pipe and the oil outlet pipe.

[0025] By adopting the above technical solution, the opening and closing pipe with threaded connection can be easily rotated to open or block the oil injection pipe and oil outlet pipe openings, thereby realizing the control of the opening and closing of the oil injection pipe and oil outlet pipe, which facilitates the injection and discharge of lubricating oil.

[0026] Optionally, the cleaning bristles are slidably connected to the power belt, and multiple linkage bars are slidably connected inside the side wall of the housing. The linkage bars are spaced apart circumferentially and surround the receiving groove. The side of the cleaning bristles away from the receiving groove is connected to the linkage bar.

[0027] The side wall of the box is provided with telescopic airbags that correspond one-to-one with the linkage bar, and a connecting pipe is provided between adjacent telescopic airbags.

[0028] One end of the telescopic airbag is connected to the side of the linkage bar facing away from the cleaning brush bristles, and the other end is connected to the housing;

[0029] A compression airbag is provided inside the side wall of the box, and an air supply pipe is provided between the compression airbag and the adjacent telescopic airbag.

[0030] The housing is equipped with a compression assembly. When the opening and closing pipe rotates to the point where the opening and closing block opens the oil injection pipe opening, the compression assembly compresses the compression airbag. At this time, the telescopic airbag expands and drives the linkage bar to move toward the receiving groove.

[0031] When the opening and closing pipe rotates to the point where the opening and closing block blocks the oil injection pipe opening, the extrusion assembly expands the extrusion airbag. At this time, the telescopic airbag contracts, causing the linkage bar to move away from the receiving groove.

[0032] By adopting the above technical solution, when the oil injection pipe is opened for oil injection, the squeezing airbag is compressed, and the gas inflates the telescopic airbag through the air supply pipe and connecting pipe, which drives the linkage bar to move towards the receiving groove, so that the cleaning bristles make close contact with the bottom wall of the receiving groove, which can better clean the contaminants in the receiving groove; when the oil injection pipe is closed, the squeezing component expands the squeezing airbag, and the telescopic airbag contracts, which drives the linkage bar to move away from the receiving groove, so that the power belt can drive the cleaning bristles to detach from the receiving groove when not cleaning.

[0033] Optionally, the extrusion assembly includes an extrusion plate, an extrusion rope, and a reset spring;

[0034] The extrusion plate is disposed at the bottom of the extrusion airbag and slides up and down inside the side wall of the box, and the extrusion rope slides through the side wall of the box;

[0035] One end of the squeezing rope is connected to the squeezing plate, and the other end is connected to the outer wall of the opening and closing tube. When the opening and closing tube rotates, it winds around the squeezing rope, and at this time the squeezing plate squeezes the squeezing airbag.

[0036] The reset spring is disposed inside the side wall of the housing, with one end connected to the bottom of the extrusion plate and the other end connected to the side wall of the housing.

[0037] By adopting the above technical solution, the opening and closing tube rotates and wraps the squeezing rope to make the squeezing plate squeeze the squeezing airbag, which can control the expansion and contraction of the telescopic airbag, thereby driving the linkage bar and the cleaning brush to move; the reset spring can make the squeezing plate reset, which facilitates the reciprocating motion of the cleaning brush.

[0038] Optionally, the linkage bar has a sliding groove on the side facing the receiving groove, and the linkage bar is provided with a sliding ball that is slidably connected in the sliding groove;

[0039] The slider part protrudes outside the groove, and the linkage bar is symmetrically provided with limiting strips to prevent the slider from leaving the groove. One end of the cleaning bristles is connected to the slider and they correspond one-to-one.

[0040] By adopting the above technical solution, when the cleaning brush is driven by the power belt to clean, the sliding ball slides in the groove, thereby cleaning the sediment at the bottom of the receiving groove more thoroughly; the limiting strip can reduce the possibility of the sliding ball leaving the groove, ensure the connection stability between the cleaning brush and the linkage strip, and ensure the normal operation of the cleaning work.

[0041] Optionally, a bending column is slidably mounted inside the side wall of the housing. The bending column is located below the cleaning brush bristles and adjacent to the power belt. A drive column that slides up and down inside the side wall of the housing is provided at the bottom of the bending column.

[0042] A drive rope is slidably threaded through the drive column on the side away from the bending column. One end of the drive rope is connected to the bottom of the linkage bar, and the other end is connected to the side wall of the box.

[0043] When the linkage bar moves away from the power belt, the drive rope gradually tightens, causing the drive column to slide upwards. At this time, the bending column bends the cleaning bristles.

[0044] By adopting the above technical solution, when the linkage bar moves away from the power belt, the drive rope will gradually tighten, causing the drive column to slide upward, which in turn causes the bending column to bend the cleaning brush bristles, allowing more cleaning brush bristles to enter the side wall of the housing.

[0045] Optionally, the support shaft is rotatably connected to the opening and closing tube.

[0046] By adopting the above technical solution, the opening and closing block can be flipped, thereby improving the injection and output rate of lubricating grease.

[0047] Optionally, the transmission assembly includes a transmission helical gear and a connecting helical gear;

[0048] The transmission helical gear is disposed on the outer periphery of the main input shaft, and the connecting helical gear is disposed on the outer periphery of the second output shaft. The transmission helical gear meshes with the connecting helical gear.

[0049] By adopting the above technical solution, the power transmission between the main input shaft and the second output shaft can be realized through the meshing of the transmission helical gear and the connecting helical gear, so that the second output shaft can obtain the power of the main input shaft and operate, thus meeting the power distribution requirements of the excavator's transmission box output shafts in different directions.

[0050] In summary, this application includes at least one of the following beneficial effects:

[0051] 1. By setting cleaning bristles on the power belt, the composite deposit layer at the bottom of the receiving tank can be cleaned, reducing the risk of residual deposits being resuspended and entering the friction pair interface, reducing the possibility of accelerated wear on the contact surface, and extending the service life of the transmission system.

[0052] 2. The opening and closing block can be flipped to increase the injection and output rate of lubricating grease. Attached Figure Description

[0053] Figure 1 This is a schematic diagram of the external structure of an embodiment of this application;

[0054] Figure 2 This is a schematic diagram of the internal cross-section of an embodiment of this application;

[0055] Figure 3 This is a schematic diagram of the internal structure of an embodiment of this application;

[0056] Figure 4 This is a schematic diagram of the internal cross-section of the side wall of the box in an embodiment of this application;

[0057] Figure 5 yes Figure 4 Enlarged schematic diagram of part A;

[0058] Figure 6 This is a schematic diagram of the connection structure between the control helical gear and the power helical gear in an embodiment of this application;

[0059] Figure 7 yes Figure 6 Enlarged schematic diagram of part B;

[0060] Figure 8 This is a schematic diagram of the state before the bristles are cleaned and bent in the embodiments of this application.

[0061] Reference numerals: 1. Housing; 11. Receiving groove; 12. Main input shaft; 13. First output shaft; 14. Second output shaft; 15. Oil injection pipe; 16. Oil outlet pipe; 17. Compressive air bladder; 2. Transmission assembly; 21. Transmission helical gear; 22. Connecting helical gear; 3. Power belt; 31. Cleaning brush; 4. Opening and closing assembly; 41. Opening and closing pipe; 42. Opening and closing block; 43. Support shaft; 5. Mounting block; 51. Mounting groove; 52. Rotation. 53. Shaft; 6. Power blade; 7. Rotating shaft; 8. Control helical gear; 9. Power helical gear; 10. Control shaft; 11. Control block; 12. Actuating shaft; 13. Actuating spring; 14. Linkage belt; 15. Linkage bar; 16. Telescopic airbag; 17. Slide groove; 18. Sliding ball; 19. Limiting bar; 20. Extrusion assembly; 21. Extrusion plate; 22. Extrusion rope; 33. Return spring; 44. Bending column; 55. Drive column; 66. Drive rope. Detailed Implementation

[0062] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0063] This application discloses an excavator transmission box.

[0064] See Figure 1 and Figure 2 This application provides an excavator transmission box, including a box body 1, a main input shaft 12, a first output shaft 13, a second output shaft 14, and a transmission assembly 2. A receiving groove 11 is provided inside the box body 1. The main input shaft 12, the first output shaft 13, and the second output shaft 14 are all rotatably connected to the box body 1, with one end of each shaft extending into the receiving groove 11 and the other end protruding outside the box body 1. The first output shaft 13 is fixedly connected to and coaxially arranged with the main input shaft 12, and the second output shaft 14 is perpendicular to the main input shaft 12.

[0065] Specifically, housing 1 is the main structure of the entire transmission box, typically made of high-strength metal materials such as cast iron or alloy steel, possessing good rigidity and corrosion resistance, protecting internal components from external environmental influences. The main input shaft 12 is generally a solid shaft, forged from high-quality steel, and its surface undergoes heat treatment processes such as quenching to improve its hardness and wear resistance. The main input shaft 12 is rotatably connected to housing 1 via bearings and oil seals. The bearings can be rolling bearings, such as deep groove ball bearings or cylindrical roller bearings, which have a low coefficient of friction and high rotational accuracy. The first output shaft 13 is also rotatably connected to housing 1 via bearings and oil seals, and is connected to the main input shaft 12 via a coupling. The coupling can be a flexible coupling, such as a quincunx flexible coupling, which can compensate for relative displacement between the two shafts, buffer and dampen vibrations, and ensure smooth power transmission. The second output shaft 14 is also rotatably connected to housing 1 via bearings and oil seals, and is perpendicular to the main input shaft 12.

[0066] The housing 1 is connected to the main input shaft 12 and the second output shaft 14 through the transmission assembly 2. This layout allows power to be transmitted in different directions and between shafts, meeting the power requirements of different working parts of the excavator.

[0067] See Figure 2 and Figure 3 The transmission assembly 2 includes a transmission helical gear 21 and a connecting helical gear 22. The transmission helical gear 21 is fixedly connected to the outer periphery of the main input shaft 12 and rotatably connected within the receiving groove 11. The connecting helical gear 22 is fixedly connected to the outer periphery of the second output shaft 14 and rotatably connected within the receiving groove 11. The connecting helical gear 22 and the transmission helical gear 21 mesh with each other. The tooth profile design of the connecting helical gear 22 and the transmission helical gear 21 enables them to withstand large loads during transmission, and provides smooth transmission with low noise. The material of the helical gears is generally alloy steel, which undergoes heat treatment processes such as carburizing and quenching to improve the hardness and strength of its tooth surface. In other embodiments, the second output shaft 14 can be connected to external power equipment via flanges, splines, or other connecting parts.

[0068] It should be noted that in other embodiments, the second output shaft 14 can be functionally replaced by the main input shaft 12, with power input through the second output shaft 14 and power output through the main input shaft 12 and the first output shaft 13.

[0069] See Figure 3 and Figure 5 The oil injection pipe 15 is fixedly connected to the vertical side wall of one side of the housing 1, and is connected to the receiving groove 11 for injecting lubricating grease. The oil outlet pipe 16 is fixedly connected to the bottom wall of the housing 1, and is connected to the receiving groove 11 for discharging the lubricating grease from the receiving groove 11. The oil injection pipe 15 and the oil outlet pipe 16 are generally made of steel or copper pipes, which have good corrosion resistance and sealing performance.

[0070] The housing 1 is equipped with an opening and closing assembly 4, which controls the opening and closing of the oil injection pipe 15 and the oil outlet pipe 16 for convenient grease replacement and maintenance. The opening and closing assembly 4 includes an opening and closing pipe 41, an opening and closing block 42, and a support shaft 43. The opening and closing pipe 41 is threadedly connected to the outer wall of the oil injection pipe 15 and the oil outlet pipe 16, and is slidably connected to the housing 1. By rotating the opening and closing pipe 41, it can be moved along the central axis of the oil injection pipe 15 and the oil outlet pipe 16. The opening and closing block 42 is disposed inside the opening and closing pipe 41. One end of the support shaft 43 is fixedly connected to the outer peripheral side wall of the opening and closing block 42. There are two support shafts 43, which are symmetrically arranged. The side of the support shaft 43 away from the opening and closing block 42 is rotatably connected to the inner wall of the opening and closing pipe 41. When in use, flip the opening and closing block 42 until its end face is facing the opening and closing pipe 41. Then rotate the opening and closing pipe 41 until the opening and closing block 42 presses against one end of the oil injection pipe 15 and the oil outlet pipe 16. At this time, the opening and closing block 42 blocks the opening of the oil injection pipe 15 and the oil outlet pipe 16.

[0071] When lubricating grease needs to be injected, rotate the corresponding opening and closing pipe 41 to move the opening and closing block 42 away from the oil injection pipe 15. Then connect the external lubricating grease injection pipe to the opening and closing pipe 41. Lubricating grease is injected into the receiving tank 11 through the opening and closing pipe 41 and the oil injection pipe 15. When the lubricating grease is injected, the support block is pushed to flip, which can increase the amount of lubricating grease injected. When lubricating grease does not need to be injected, rotate the opening and closing pipe 41 to block the oil injection pipe 15, thereby controlling the blocking of the oil injection pipe 15.

[0072] When it is necessary to discharge lubricating grease, rotate the corresponding opening and closing pipe 41 to move the opening and closing block 42 away from the outlet pipe 16. Then, the lubricating grease in the receiving tank 11 is discharged through the outlet pipe 16 and the opening and closing pipe 41. When the lubricating grease is discharged, it pushes the opening and closing block 42 to flip, which can increase the discharge volume of lubricating grease. When it is not necessary to discharge lubricating grease, rotate the opening and closing pipe 41 and manually push the opening and closing block 42 to face the outlet pipe 16 so that the opening and closing block 42 can block the outlet pipe 16, thereby achieving the blocking control of the outlet pipe 16.

[0073] The transmission box also includes a power belt 3, which is connected end-to-end and slidably connected to the inner wall of the box body 1. The power belt 3 surrounds a receiving groove 11 opened inside the box body 1. "T"-shaped connecting strips are fixedly connected to the top and bottom of the power belt 3, and these connecting strips are slidably connected to the side wall of the box body 1, guiding the power belt 3 to slide while preventing it from detaching from the side wall of the box body 1. Cleaning bristles 31 are provided on the power belt 3, extending into the receiving groove 11. Multiple cleaning bristles 31 are evenly spaced along the extension direction of the power belt 3. The cleaning bristles 31 are slidably connected to the bottom wall of the receiving groove 11. Through the sliding of the power belt 3, the cleaning bristles 31 can clean the deposits at the bottom of the receiving groove 11, reducing the possibility of secondary re-suspension of deposits into the friction pair interface, which helps to reduce wear on the transmission system and extend its service life.

[0074] The power belt 3 is typically made of materials with a certain degree of elasticity and wear resistance, such as rubber or polyurethane, and has a ring structure with the ends connected. The cleaning bristles 31 can be made of nylon bristles, which have good flexibility, are not prone to damaging the bottom wall of the receiving tank 11, and can effectively clean stubborn deposits.

[0075] An installation block 5 is fixedly connected to the outer wall of the oil injection pipe 15, and the installation block 5 is located inside the side wall of the housing 1. An installation groove 51 is formed inside the installation block 5, and the installation groove 51 communicates with the oil injection pipe 15. A rotating shaft 52 is rotatably connected to the installation block 5, and the rotating shaft 52 is perpendicular to the oil injection pipe 15. Multiple power blades 53 are fixedly connected to the outer circumference of the rotating shaft 52, and are evenly spaced circumferentially. The power blades 53 extend into the oil injection pipe 15. When lubricating grease passes through the oil injection pipe 15, the lubricating grease impacts the power blades 53, pushing the power blades 53, causing the rotating shaft 52 to rotate.

[0076] See Figure 5 and Figure 6 The transmission box also includes a control component, which is set on the box body 1. When the rotating shaft 52 rotates, the control component controls the power belt 3 to slide back and forth, so as to realize the continuous cleaning of the receiving groove 11 by the cleaning bristles 31.

[0077] See Figure 7 and Figure 8The control components include a control helical gear 61, a power helical gear 62, a control shaft 63, a control block 64, a toggle shaft 65, and a toggle spring 66.

[0078] See Figure 4 and Figure 6 A rotating shaft 6 is rotatably connected inside the side wall of housing 1, and the rotating shaft 6 is parallel to the rotating shaft 52. A linkage belt 67 slides through the side wall of housing 1, and the linkage belt 67 is sleeved between the rotating shaft 6 and the rotating shaft 52. A control helical gear 61 is fixedly connected to the outer circumference of the rotating shaft and rotatably connected inside the side wall of housing 1. A control shaft 63 is rotatably connected inside the side wall of housing 1, and a power helical gear 62 is fixedly connected to the outer circumference of the control shaft 63 and rotatably connected inside the side wall of housing 1. The control helical gear 61 and the power helical gear 62 mesh.

[0079] See Figure 7 and Figure 8 When rotating shaft 52 (rotating shaft 52 in Figure 5 When the control shaft 63 rotates, the meshing of the control helical gear 61 and the power helical gear 62 drives the control shaft 63 to rotate. The actuating shaft 65 is fixedly connected to the outer periphery of the control shaft 63, and the actuating shaft 65 is slidably connected to the inner side wall of the housing 1. The control block 64 is fixedly connected to the inner wall of the power belt 3.

[0080] When the control shaft 63 rotates, the actuating shaft 65 actuates the control block 64, pushing the power belt 3 to slide until the actuating shaft 65 passes the control block 64, at which point the actuating shaft 65 slides on the control block 64. The actuating spring 66 is installed inside the inner wall of the housing 1, with one end abutting against the control block 64 and the other end abutting against the side wall of the housing 1. When the actuating shaft 65 slides on the control block 64, pushing the power belt 3 to slide, the actuating spring 66 enters a compressed state; when the actuating shaft 65 moves away from the control block 64, the actuating spring 66 elastically releases, driving the control block 64 to reset, allowing the power belt 3 to slide back and forth.

[0081] See Figure 5 The cleaning brush bristles 31 are slidably connected to the power belt 3. A linkage bar 7 is slidably connected inside the side wall of the housing 1. The linkage bar 7 has a cuboid structure and its length is parallel to the power belt 3. There are multiple linkage bars 7, which are spaced apart circumferentially. The linkage bars 7 surround the receiving groove 11, and the side of the cleaning brush bristles 31 on the same side that is away from the receiving groove 11 is connected to the same linkage bar 7.

[0082] Telescopic airbags 71 are installed inside the side wall of the housing 1. Multiple telescopic airbags 71 are provided, each corresponding to a linkage bar 7. A connecting pipe is fixedly connected between adjacent telescopic airbags 71, located on the side of the airbag 71 away from the receiving groove 11. One end of each airbag 71 is connected and fixed to the linkage bar 7 on the side facing away from the cleaning bristles 31, and the other end is connected and fixed to the housing 1. A sliding groove 72 is formed on the side of the linkage bar 7 facing the receiving groove 11, extending along the length of the linkage bar 7. A sliding ball 73 is provided on the linkage bar 7, slidably connected within the sliding groove 72, with a portion of the sliding ball 73 protruding outside the sliding groove 72. Restricting bars 74 are symmetrically fixed above and below the linkage bar 7, located at the opening of the sliding groove 72. The distance between the upper and lower restricting bars 74 is less than the diameter of the sliding ball 73, used to prevent the sliding ball 73 from detaching from the sliding groove 72. The end of the cleaning bristles 31 away from the receiving groove 11 is fixedly connected to the outer peripheral side wall of the sliding ball 73, with each end corresponding to one of the bristles.

[0083] A compression airbag 17 is installed inside the side wall of the housing 1, located above the telescopic airbag 71. The compression airbag 17 has a "U"-shaped structure, and its top outer wall is fixedly connected to the side wall of the housing 1. An air supply pipe is provided between the compression airbag 17 and the adjacent telescopic airbag 71 below, allowing airflow from the compression airbag 17 to flow into the telescopic airbag 71 through the air supply pipe. The housing 1 is equipped with a compression assembly 8. When the opening and closing pipe 41 rotates to the opening and closing block 42 to open the oil injection pipe 15, the compression assembly 8 compresses the compression airbag 17. At this time, the telescopic airbag 71 expands, causing the linkage bar 7 to move towards the receiving groove 11, allowing the cleaning bristles 31 to extend into the receiving groove 11 and slide against the bottom wall of the receiving groove 11. When the opening and closing pipe 41 rotates to the opening and closing block 42 to block the oil injection pipe 15, the compression assembly 8 expands the compression airbag 17. At this time, the telescopic airbag 71 contracts, causing the linkage bar 7 to move away from the receiving groove 11.

[0084] The compression assembly 8 includes a compression plate 81, a compression rope 82, and a return spring 83. The compression plate 81 slides up and down within the side wall of the housing 1 and is fixedly connected to the bottom of the compression airbag 17. The compression rope 82 slides through the side wall of the housing 1. One end of the compression rope 82 is connected to the top center of the compression plate 81 and passes through the hollow center of the compression airbag 17. The other end is fixedly connected to the outer wall of the opening and closing tube 41. When the opening and closing tube 41 rotates, it winds around the compression rope 82, causing the compression plate 81 to move upward. At this time, the compression plate 81 compresses the compression airbag 17, and the air inside the compression airbag 17 flows into the telescopic airbag 71, causing the telescopic airbag 71 to expand and drive the linkage 7 to move in the direction of the power belt 3. The return spring 83 is installed within the side wall of the housing 1. One end of the return spring 83 is fixedly connected to the bottom of the compression plate 81, and the other end is fixedly connected to the side wall of the housing 1. When the compression plate 81 compresses the compression airbag 17, the return spring 83 enters an elastic tension state. When the opening and closing tube 41 rotates in the opposite direction and releases the squeezing rope 82, the reset spring 83 is released elastically, pushing the squeezing plate 81 to move downward, causing the squeezing plate 81 to cause the squeezing airbag 17 to expand, causing the air in the squeezing airbag 17 to flow back into the squeezing airbag 17. At this time, the linkage bar 7 moves away from the power belt 3.

[0085] A bending column 9 slides up and down inside the side wall of the housing 1. The bending column 9 is located below the cleaning bristles 31 and near the power belt 3, and the bending column 9 has a cylindrical structure. The bending column 9 corresponds one-to-one with the linkage bar 7, and the length direction of the bending column 9 is parallel to the length direction of the linkage bar 7. A drive column 91 is fixedly connected to the bottom outer wall of the bending column 9, and the drive column 91 slides up and down on the side wall of the housing 1. A drive rope 92 slides through the side of the drive column 91 away from the bending column 9. One end of the drive rope 92 is connected to the bottom of the linkage bar 7, and the other end is connected to the side wall of the housing 1. When the linkage bar 7 moves away from the power belt 3, the drive rope 92 gradually tightens, causing the drive column 91 to slide upward. At this time, the bending column 9 bends the cleaning bristles 31, causing more cleaning bristles 31 to slide out of the receiving groove 11. When the linkage bar 7 approaches the power belt 3, the drive rope 92 enters the conveying state. At this time, it slides downward under the gravity of the drive column 91 and the bending column 9. At this time, the cleaning bristles 31 return to their deformed state and slide into the receiving groove 11 under the push of the linkage bar 7.

[0086] The implementation principle of an excavator transmission box according to an embodiment of this application is as follows:

[0087] The excavator transmission box achieves efficient power transmission through a reasonable shaft layout and transmission component 2. When the lubricating grease in the box 1 needs to be replaced, the lubricating grease in the receiving groove 11 is first drained, and at the same time, flushing oil is injected to flush the inside of the box 1, reducing the amount of sediment in the receiving groove 11. During the flushing process, the power belt 3 and cleaning brush 31 can remove the sediment in the receiving groove 11, reducing the damage of the sediment to the transmission system. After flushing, the oil outlet pipe 16 is first blocked by the opening and closing component 4, and then new lubricating grease is injected. After injection, the oil filling pipe 15 is blocked by the opening and closing component 4. Compared with traditional excavator transmission boxes, this embodiment can effectively reduce the wear of the transmission system, extend its service life, and improve the working efficiency and reliability of the excavator.

[0088] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A transmission box for an excavator, characterized in that: Includes a box body (1), and the box body (1) has a receiving groove (11) inside; The main input shaft (12) is rotatably connected to the housing (1); The first output shaft (13) is rotatably connected to the housing (1), and the first output shaft (13) is connected to the main input shaft (12) and coaxially arranged; The second output shaft (14) is rotatably connected to the housing (1) and perpendicular to the main input shaft (12). The housing (1) is provided with a transmission assembly (2) that connects the main input shaft (12) and the second output shaft (14). The power belt (3) is connected end to end and slidably connected to the inner wall of the box (1) and the power belt (3) surrounds the receiving groove (11). The power belt (3) is evenly spaced with a plurality of cleaning bristles (31) extending into the receiving groove (11), and the cleaning bristles (31) are slidably connected to the bottom wall of the receiving groove (11). The side wall of the box (1) is provided with an oil injection pipe (15) that connects to the receiving groove (11), and the bottom of the box (1) is provided with an oil outlet pipe (16) that connects to the receiving groove (11). The box (1) is provided with an opening and closing assembly (4) that controls the opening and closing of the oil injection pipe (15) and the oil outlet pipe (16). An installation block (5) is provided on the outer wall of the oil injection pipe (15). The installation block (5) has an installation groove (51) that communicates with the oil injection pipe (15). The installation block (5) is rotatably connected to a rotating shaft (52) that is perpendicular to the oil injection pipe (15). Power blades (53) are evenly spaced along the circumferential direction on the outer periphery of the rotating shaft (52). The power blades (53) extend into the oil injection pipe (15). A control component is provided in the housing (1). When the rotating shaft (52) rotates, the control component controls the power belt (3) to slide back and forth. The opening and closing assembly (4) includes an opening and closing tube (41), an opening and closing block (42), and a support shaft (43). The opening and closing pipe (41) is threaded to the outer wall of the oil injection pipe (15) and the oil outlet pipe (16). The opening and closing block (42) is disposed inside the opening and closing pipe (41). The two ends of the support shaft (43) are respectively connected to the inner wall of the opening and closing pipe (41) and the outer peripheral side wall of the opening and closing block (42). The opening and closing block (42) blocks the opening of the oil injection pipe (15) and the oil outlet pipe (16). The cleaning bristles (31) are slidably connected to the power belt (3), and a plurality of linkage strips (7) are slidably connected inside the side wall of the housing (1). The linkage strips (7) are spaced apart in the circumferential direction and surround the receiving groove (11). The cleaning bristles (31) on the side away from the receiving groove (11) are connected to the linkage strips (7). The side wall of the box (1) is provided with telescopic airbags (71) that correspond one-to-one with the linkage bar (7), and a connecting pipe is provided between adjacent telescopic airbags (71); One end of the telescopic airbag (71) is connected to the side of the linkage bar (7) facing away from the cleaning bristles (31), and the other end is connected to the box body (1). A compression airbag (17) is provided inside the side wall of the box (1), and an air supply pipe is provided between the compression airbag (17) and the adjacent telescopic airbag (71); The housing (1) is provided with an extrusion assembly (8). When the opening and closing pipe (41) rotates to the opening and closing block (42) opening the oil injection pipe (15), the extrusion assembly (8) extrudes the extrusion airbag (17). At this time, the telescopic airbag (71) expands and drives the linkage bar (7) to move towards the receiving groove (11). When the opening and closing pipe (41) rotates to the point where the opening and closing block (42) blocks the opening of the oil injection pipe (15), the extrusion assembly (8) expands the extrusion airbag (17), and at this time the telescopic airbag (71) contracts, causing the linkage bar (7) to move away from the receiving groove (11).

2. The excavator transmission box according to claim 1, characterized in that: The control assembly includes a control helical gear (61), a power helical gear (62), a control shaft (63), a control block (64), a toggle shaft (65), and a toggle spring (66). The control helical gear (61) is disposed on the outer periphery of the rotating shaft (52), the control shaft (63) is rotatably connected to the side wall of the housing (1), the power helical gear (62) is disposed on the outer periphery of the control shaft (63), and the control helical gear (61) meshes with the power helical gear (62); The actuating shaft (65) is located on the outer periphery of the control shaft (63) and is slidably connected to the side wall of the housing (1); the control block (64) is located on the inner wall of the power belt (3). When the control shaft (63) rotates, the actuating shaft (65) slides on the control block (64). The actuating spring (66) is located inside the side wall of the housing (1). When the actuating shaft (65) moves away from the control block (64), the actuating spring (66) drives the control block (64) to reset.

3. The excavator transmission box according to claim 1, characterized in that: The extrusion assembly (8) includes an extrusion plate (81), an extrusion rope (82), and a reset spring (83). The extrusion plate (81) is located at the bottom of the extrusion airbag (17) and slides up and down inside the side wall of the box (1), and the extrusion rope (82) slides through the side wall of the box (1). One end of the squeezing rope (82) is connected to the squeezing plate (81), and the other end is connected to the outer wall of the opening and closing tube (41). When the opening and closing tube (41) rotates, it wraps around the squeezing rope (82). At this time, the squeezing plate (81) squeezes the squeezing airbag (17). The reset spring (83) is disposed inside the side wall of the housing (1). One end of the reset spring (83) is connected to the bottom of the extrusion plate (81), and the other end is connected to the side wall of the housing (1).

4. The excavator transmission box according to claim 3, characterized in that: The linkage bar (7) has a groove (72) on the side facing the receiving groove (11), and the linkage bar (7) is provided with a sliding ball (73) that is slidably connected in the groove (72). The slider (73) protrudes out of the groove (72), and the linkage bar (7) is symmetrically provided with limiting strips (74) to restrict the slider (73) from leaving the groove (72). One end of the cleaning bristles (31) is connected to the slider (73) and they correspond one-to-one.

5. The excavator transmission box according to claim 4, characterized in that: The box (1) has a bending column (9) that slides up and down inside the side wall. The bending column (9) is located below the cleaning brush (31) and adjacent to the power belt (3). The bottom of the bending column (9) is provided with a drive column (91) that slides up and down inside the side wall of the box (1). A drive rope (92) is slidably threaded through the drive column (91) on the side away from the bending column (9). One end of the drive rope (92) is connected to the bottom of the linkage bar (7), and the other end is connected to the side wall of the box (1). When the linkage bar (7) moves away from the power belt (3), the drive rope (92) gradually tightens, causing the drive column (91) to slide upward. At this time, the bending column (9) bends the cleaning bristles (31).

6. The excavator transmission box according to claim 1, characterized in that: The support shaft (43) is rotatably connected to the opening and closing tube (41).

7. The excavator transmission box according to claim 1, characterized in that: The transmission assembly (2) includes a transmission helical gear (21) and a connecting helical gear (22). The transmission helical gear (21) is disposed on the outer periphery of the main input shaft (12), and the connecting helical gear (22) is disposed on the outer periphery of the second output shaft (14). The transmission helical gear (21) meshes with the connecting helical gear (22).

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