Gearbox lubricating system and loader
By setting multiple oil passages and return ports in the gearbox and transfer case, the bearings are directly lubricated, which solves the problems of difficult disassembly and high cost caused by the large number of external oil pipes, and realizes reliable lubrication and stable operation of the bearings inside the gearbox.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-16
- Publication Date
- 2026-03-10
AI Technical Summary
The existing transmission lubrication system has a large number of external oil pipes, which makes disassembly and assembly difficult, maintenance inconvenient and costly, and the lubrication effect is poor, which can easily cause bearing damage.
The transmission lubrication system employs multiple oil passages and return ports within the transmission housing and transfer case housing to directly lubricate the bearings, reducing the use of external oil pipes and achieving reliable and sufficient lubrication of the bearings through internal oil passages and return ports.
This achieves full lubrication of the internal bearings of the gearbox, reduces the possibility of bearing damage, simplifies the maintenance process, reduces costs, facilitates maintenance, and ensures reliable operation of the gearbox at high speeds.
Smart Images
Figure CN223984784U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of engineering machinery technology, and in particular to a gearbox lubrication system and a loader. Background Technology
[0002] Electric wheel loaders are commonly used construction machinery due to their excellent mobility and convenience, and are frequently used in road construction, mining, and agricultural irrigation projects. The most crucial component of an electric wheel loader is its high-speed electric drive gearbox, which is primarily driven by an electric motor. The motor enhances power transmission, regulates speed, and amplifies torque, enabling it to maintain high-speed operation for extended periods with reliable performance.
[0003] High-speed motors maintain high speeds during operation, which in turn requires the transmission to maintain high speeds to output speed and torque. Under these high speeds, the lubrication of the bearings within the transmission's internal shaft system becomes extremely critical. Insufficient or ineffective lubrication can easily damage the internal bearings. Currently, transmissions lubricate their internal bearings through a combination of external oil pipes and internal oil passages. However, current transmissions have numerous and long external oil pipes, which take up considerable space and require external components such as pipe fittings, resulting in high costs and complex assembly processes. Furthermore, maintenance requires disassembly and reassembly, which is inconvenient due to limited external space, making inspection and repair difficult. Utility Model Content
[0004] The purpose of this invention is to provide a gearbox lubrication system with a simple structure, reducing the need for external oil pipes, and enabling sufficient lubrication of the internal bearings.
[0005] To achieve this objective, the present invention adopts the following technical solution:
[0006] A transmission lubrication system includes a transmission housing, an input shaft, an intermediate shaft, a transmission control valve, and a transfer case housing; wherein,
[0007] The input shaft and the intermediate shaft are disposed inside the gearbox housing. The gearbox housing is provided with a first bearing, a second bearing, a third bearing and a fourth bearing. The first bearing and the third bearing are located on the first side of the gearbox housing, and the second bearing and the fourth bearing are located on the second side of the gearbox housing. The input shaft is rotatably connected to the gearbox housing through the first bearing and the second bearing, and the intermediate shaft is rotatably connected to the gearbox housing through the third bearing and the fourth bearing.
[0008] The transmission control valve has a first oil passage connected to the oil tank, and a second oil passage connected to the first oil passage is provided inside the second side of the transmission housing. The first oil passage and the second oil passage are used to receive the lubricating oil from the oil tank and supply it to the second bearing and the fourth bearing.
[0009] The transfer case housing is fixed to the first side of the gearbox housing and has an oil return port. The gearbox housing has a third oil passage connected to the oil return port. The third oil passage is used to receive the lubricating oil from the oil return port and supply it to the first bearing and the third bearing.
[0010] Preferably, the gearbox housing has a first groove, a second groove, a third groove, and a fourth groove. The first bearing is installed in the first groove, the second bearing is installed in the second groove, the third bearing is installed in the third groove, and the fourth bearing is installed in the fourth groove. The second oil passage connects the second groove and the fourth groove, and the third oil passage connects the first groove and the third groove.
[0011] Preferably, the oil return port is located above the third oil passage.
[0012] Preferably, it also includes a first gear shaft, a second gear shaft, a first oil distribution cap, and a second oil distribution cap; wherein...
[0013] The first gear shaft and the second gear shaft are disposed inside the gearbox housing. The gearbox housing is provided with a fifth bearing, a sixth bearing, a seventh bearing, and an eighth bearing. The fifth bearing and the seventh bearing are located on the first side of the gearbox housing, and the sixth bearing and the eighth bearing are located on the second side of the gearbox housing. The first gear shaft is rotatably connected to the gearbox housing through the fifth bearing and the sixth bearing, and the second gear shaft is rotatably connected to the gearbox housing through the seventh bearing and the eighth bearing.
[0014] The first oil distribution cap and the second oil distribution cap are fixed to the second side of the gearbox housing. The first oil distribution cap has a first inner cavity, and the second oil distribution cap has a second inner cavity. The oil tank communicates with the first inner cavity. The gearbox housing has a fourth oil passage communicating with the first inner cavity and the second inner cavity. The first gear shaft has a first oil supply passage communicating with the first inner cavity. The first oil supply passage is used to receive the lubricating oil in the first inner cavity and supply it to the fifth bearing and the sixth bearing. The second gear shaft has a second oil supply passage communicating with the second inner cavity. The second oil supply passage is used to receive the lubricating oil in the second inner cavity and supply it to the seventh bearing and the eighth bearing.
[0015] Preferably, the gearbox housing has a fifth, a sixth, a seventh, and an eighth slot. The fifth bearing is installed in the fifth slot, the sixth bearing is installed in the sixth slot, the seventh bearing is installed in the seventh slot, and the eighth bearing is installed in the eighth slot. The first oil passage connects the fifth and the sixth slots, and the second oil passage connects the seventh and the eighth slots.
[0016] Preferably, the first stop shaft has a first lubrication hole and a second lubrication hole that communicate with the first oil channel. The first oil channel is connected to the fifth groove through the first lubrication hole, and the first oil channel is connected to the sixth groove through the second lubrication hole.
[0017] The second gear shaft has a third lubrication hole and a fourth lubrication hole that communicate with the second oil passage. The second oil passage is connected to the seventh groove through the third lubrication hole, and the second oil passage is connected to the eighth groove through the fourth lubrication hole.
[0018] Preferably, the diameters of the first lubrication hole and the second lubrication hole are smaller than the diameter of the first oil delivery channel, and the diameters of the third lubrication hole and the fourth lubrication hole are smaller than the diameter of the second oil delivery channel.
[0019] Preferably, the first oil distribution cap has a first oil distribution channel, the second oil distribution cap has a second oil distribution channel, and the first inner cavity, the first oil distribution channel, the fourth oil channel, the second oil distribution channel and the second inner cavity are connected in sequence.
[0020] Preferably, the first inner cavity, the first oil distribution channel, the fourth oil channel, the second oil distribution channel, and the second inner cavity are arranged sequentially from top to bottom.
[0021] This utility model also provides a loader, including the above-mentioned gearbox lubrication system, which can fully and comprehensively lubricate the bearings inside the gearbox, ensuring the overall reliable operation of the loader.
[0022] A loader includes a gearbox lubrication system as described in any of the preceding claims, and also includes a chassis, with the gearbox housing fixed to the chassis.
[0023] Beneficial effects:
[0024] The transmission lubrication system provided by this utility model has a first oil passage in the transmission control valve, and a second and third oil passages in the transmission housing. The oil tank supplies lubricating oil, a portion of which flows through the first oil passage and then through the second oil passage to supply lubricating bearings located on the second side of the transmission housing. The remaining lubricating oil enters the transfer case housing, lubricates the interior of the transfer case, and is discharged through the return port before flowing through the third oil passage to supply lubricating bearings located on the first side of the transmission housing. This transmission lubrication system fully utilizes the oil passages in the transmission housing and, in conjunction with the return port of the transfer case housing, provides reliable and sufficient lubrication to the first, second, third, and fourth bearings. It features a simple structure, high reliability, effectively reduces the possibility of damage to internal bearings due to insufficient lubrication, and ensures reliable operation of the transmission at high speeds for extended periods. It not only solves the problem of difficult disassembly and maintenance caused by excessive external oil pipes, but also reduces the use of external oil pipes and connectors, lowering costs and facilitating maintenance.
[0025] The loader provided by this utility model includes the aforementioned gearbox lubrication system, in which the first, second, third, and fourth bearings inside the gearbox housing can receive reliable and sufficient lubrication, ensuring the loader's overall reliable and stable operation over a long period. Attached Figure Description
[0026] Figure 1 This is a schematic diagram of the gearbox lubrication system provided by this utility model from one perspective;
[0027] Figure 2 This is a structural schematic diagram of the gearbox lubrication system provided by this utility model from another perspective;
[0028] Figure 3 This utility model is based on Figure 1 Sectional view at point A in the middle;
[0029] Figure 4 This utility model is based on Figure 1 Sectional view at point C;
[0030] Figure 5 This utility model is based on Figure 2 Sectional view at point D;
[0031] Figure 6 This utility model is based on Figure 3 Sectional view at point B;
[0032] Figure 7 This utility model is based on Figure 1 Sectional view at point E in the middle;
[0033] Figure 8 This utility model is based on Figure 2 Sectional view at point F.
[0034] In the picture:
[0035] 1. Gearbox housing; 101. First groove; 102. Second groove; 103. Third groove; 104. Fourth groove; 105. Fifth groove; 106. Sixth groove; 107. Seventh groove; 108. Eighth groove; 11. Second oil passage; 111. First branch section; 112. Second branch section; 113. Third branch section; 12. Third oil passage; 13. Fourth oil passage;
[0036] 21. Input shaft; 22. Intermediate shaft; 23. First gear shaft; 231. First oil passage; 232. First lubrication hole; 233. Second lubrication hole; 24. Second gear shaft; 241. Second oil passage; 242. Third lubrication hole; 243. Fourth lubrication hole;
[0037] 3. Speed control valve; 31. First oil passage;
[0038] 4. Transfer case housing; 41. Oil return port;
[0039] 51. First bearing; 52. Second bearing; 53. Third bearing; 54. Fourth bearing; 55. Fifth bearing; 56. Sixth bearing; 57. Seventh bearing; 58. Eighth bearing;
[0040] 61. First oil distribution cap; 611. First inner cavity; 612. First oil distribution passage; 62. Second oil distribution cap; 621. Second inner cavity; 622. Second oil distribution passage. Detailed Implementation
[0041] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.
[0042] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0043] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0044] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0045] This embodiment provides a gearbox lubrication system. (Refer to...) Figures 1 to 8 As shown, the transmission lubrication system includes a transmission housing 1, an input shaft 21, an intermediate shaft 22, a transmission control valve 3, and a transfer case housing 4. The input shaft 21 and intermediate shaft 22 are located within the transmission housing 1. The transmission housing 1 contains a first bearing 51, a second bearing 52, a third bearing 53, and a fourth bearing 54. The first bearing 51 and the third bearing 53 are located on the first side of the transmission housing 1, and the second bearing 52 and the fourth bearing 54 are located on the second side of the transmission housing 1. The input shaft 21 is rotatably connected to the transmission housing 1 via the first bearing 51 and the second bearing 52, and the intermediate shaft 22 is rotatably connected to the transmission housing 1 via the third bearing 53 and the fourth bearing 54. The transmission control valve 3 has a first oil passage 31 connected to the oil tank. The second side of the transmission housing 1 is provided with a second oil passage 11 connected to the first oil passage 31. The first oil passage 31 and the second oil passage 11 are used to receive the lubricating oil from the oil tank and supply it to the second bearing 52 and the fourth bearing 54. The transfer case housing 4 is fixed to the first side of the transmission housing 1 and has an oil return port 41. The transmission housing 1 is provided with a third oil passage 12 connected to the oil return port 41. The third oil passage 12 is used to receive the lubricating oil from the oil return port 41 and supply it to the first bearing 51 and the third bearing 53.
[0046] In this embodiment, the transmission control valve 3 has a first oil passage 31, and the transmission housing 1 has a second oil passage 11 and a third oil passage 12. The oil tank supplies lubricating oil, a portion of which is supplied to the second bearing 52 and the fourth bearing 54 via the first oil passage 31 and then via the second oil passage 11, thereby providing lubrication to the second bearing 52 and the fourth bearing 54 located on the second side of the transmission housing 1; the other portion of the lubricating oil enters the transfer case housing 4, and the lubricating oil inside the transfer case housing 4 is discharged from the oil return port 41 and then supplied to the first bearing 51 and the third bearing 53 via the third oil passage 12, thereby providing lubrication to the first bearing 51 and the third bearing 53 located on the first side of the transmission housing 1. This transmission lubrication system makes full use of the oil passages in the transmission housing 1 and works with the oil return port 41 of the transfer case housing 4 to reliably and fully lubricate the first bearing 51, the second bearing 52, the third bearing 53, and the fourth bearing 54. It has a simple structure, high reliability, and effectively reduces the possibility of damage to internal bearings due to lack of lubrication. It ensures that the transmission can operate reliably at high speeds for a long time. It not only solves the problem of difficult disassembly and maintenance caused by too many external oil pipes, but also reduces the use of external oil pipes and joints, reduces costs, and facilitates maintenance.
[0047] In this embodiment, the gearbox housing 1 has a first groove 101, a second groove 102, a third groove 103, and a fourth groove 104. A first bearing 51 is installed in the first groove 101, a second bearing 52 is installed in the second groove 102, a third bearing 53 is installed in the third groove 103, and a fourth bearing 54 is installed in the fourth groove 104. A second oil passage 11 connects the second groove 102 and the fourth groove 104, and a third oil passage 12 connects the first groove 101 and the third groove 103. Specifically, lubricating oil flows into the second groove 102 and the fourth groove 104 after passing through the first oil passage 31 and the second oil passage 11. The lubricating oil flows from the groove wall of the second groove 102 to the outer surface of the second bearing 52 and then extends into the second bearing 52, thereby lubricating the second bearing 52; the lubricating oil flows from the groove wall of the fourth groove 104 to the outer surface of the fourth bearing 54 and then extends into the fourth bearing 54, thereby lubricating the fourth bearing 54. Specifically, the lubricating oil flows into the first groove 101 and the third groove 103 after passing through the oil return port 41 and the third oil passage 12. The lubricating oil flows from the groove wall of the first groove 101 to the outer surface of the first bearing 51 and then extends into the first bearing 51, thereby lubricating the first bearing 51; the lubricating oil flows from the groove wall of the third groove 103 to the outer surface of the third bearing 53 and then extends into the third bearing 53, thereby lubricating the third bearing 53.
[0048] For example, the second oil passage 11 includes a first branch passage 111, a second branch passage 112, and a third branch passage 113 connected in sequence. The first branch passage 111 connects to the first oil passage 31, and the third branch passage 113 connects to the second groove 102 and the fourth groove 104. The first branch passage 111 is opened along the length direction of the gearbox housing 1, the second branch passage 112 is opened along the height direction of the gearbox housing 1, and the third branch passage 113 is opened along the width direction of the gearbox housing 1. After being discharged from the first oil passage 31, the lubricating oil flows sequentially through the first branch passage 111, the second branch passage 112, and the third branch passage 113, and then flows into the second groove 102 and the fourth groove 104 through the third branch passage 113.
[0049] In this embodiment, the oil return port 41 is located above the third oil passage 12. Exemplarily, in this embodiment, the third oil passage 12 is opened along the height direction of the gearbox housing 1, and the first groove 101 and the third groove 103 are located on one side of the third oil passage 12. After the lubricating oil is discharged from the oil outlet, it can flow from top to bottom through the third oil passage 12 under the action of gravity, and can flow into the first groove 101 and the third groove 103 in one go. Of course, the directional flow of the lubricating oil can also be achieved by using a driving component such as an oil pump.
[0050] In this embodiment, the transmission lubrication system further includes a first gear shaft 23, a second gear shaft 24, a first oil distribution cap 61, and a second oil distribution cap 62. The first gear shaft 23 and the second gear shaft 24 are disposed within the transmission housing 1. The transmission housing 1 contains a fifth bearing 55, a sixth bearing 56, a seventh bearing 57, and an eighth bearing 58. The fifth bearing 55 and the seventh bearing 57 are located on the first side of the transmission housing 1, and the sixth bearing 56 and the eighth bearing 58 are located on the second side of the transmission housing 1. The first gear shaft 23 is rotatably connected to the transmission housing 1 via the fifth bearing 55 and the sixth bearing 56, and the second gear shaft 24 is rotatably connected to the transmission housing 1 via the seventh bearing 57 and the eighth bearing 58. The first oil distribution cap 61 and the second oil distribution cap 62 are fixed to the second side of the gearbox housing 1. The first oil distribution cap 61 has a first inner cavity 611, and the second oil distribution cap 62 has a second inner cavity 621. The oil tank is connected to the first inner cavity 611. The gearbox housing 1 has a fourth oil passage 13 that connects the first inner cavity 611 and the second inner cavity 621. The first gear shaft 23 has a first oil supply passage 231 that connects to the first inner cavity 611. The first oil supply passage 231 is used to receive the lubricating oil in the first inner cavity 611 and supply it to the fifth bearing 55 and the sixth bearing 56. The second gear shaft 24 has a second oil supply passage 241 that connects to the second inner cavity 621. The second oil supply passage 241 is used to receive the lubricating oil in the second inner cavity 621 and supply it to the seventh bearing 57 and the eighth bearing 58.
[0051] In this embodiment, a portion of the lubricating oil supplied by the oil tank enters the first inner cavity 611 of the first oil distribution cap 61 and is divided into two paths. The first path of lubricating oil is supplied sequentially to the fifth bearing 55 and the sixth bearing 56 via the first oil delivery channel 231, thereby providing lubrication to the fifth bearing 55 and the sixth bearing 56. The second path of lubricating oil flows from the first inner cavity 611 to the second inner cavity 621, and is then supplied to the seventh bearing 57 and the eighth bearing 58 via the second oil delivery channel 241, thereby providing lubrication to the seventh bearing 57 and the eighth bearing 58. This gearbox lubrication system further makes full use of the internal oil passages of the first gear shaft 23 and the second gear shaft 24, thereby reliably and sufficiently lubricating the fifth bearing 55, the sixth bearing 56, the seventh bearing 57, and the eighth bearing 58, reducing the use of external oil pipes and joints.
[0052] In this embodiment, the gearbox housing 1 has a fifth groove 105, a sixth groove 106, a seventh groove 107, and an eighth groove 108. A fifth bearing 55 is installed in the fifth groove 105, a sixth bearing 56 is installed in the sixth groove 106, a seventh bearing 57 is installed in the seventh groove 107, and an eighth bearing 58 is installed in the eighth groove 108. A first oil passage 231 connects the fifth groove 105 and the sixth groove 106, and a second oil passage 241 connects the seventh groove 107 and the eighth groove 108. Specifically, lubricating oil flows into the fifth groove 105 and the sixth groove 106 after passing through the first oil passage 231. The lubricating oil flows from the groove wall of the fifth groove 105 to the outer surface of the fifth bearing 55 and then extends into the fifth bearing 55, thereby lubricating the fifth bearing 55. Similarly, the lubricating oil flows from the groove wall of the sixth groove 106 to the outer surface of the sixth bearing 56 and then extends into the sixth bearing 56, thereby lubricating the sixth bearing 56. Specifically, the lubricating oil flows into the seventh groove 107 and the eighth groove 108 after passing through the second oil channel 241. The lubricating oil flows from the groove wall of the seventh groove 107 to the outer surface of the seventh bearing 57 and then extends into the seventh bearing 57, thereby lubricating the seventh bearing 57; the lubricating oil flows from the groove wall of the eighth groove 108 to the outer surface of the eighth bearing 58 and then extends into the eighth bearing 58, thereby lubricating the eighth bearing 58.
[0053] Specifically, the first-stage shaft 23 has a first lubrication hole 232 and a second lubrication hole 233 communicating with the first oil passage 231. The first oil passage 231 connects to the fifth groove 105 through the first lubrication hole 232, and to the sixth groove 106 through the second lubrication hole 233. Specifically, lubricating oil flows through the first oil passage 231, then through the first lubrication hole 232 into the fifth groove 105, and through the second lubrication hole 233 into the sixth groove 106. The second-stage shaft 24 has a third lubrication hole 242 and a fourth lubrication hole 243 communicating with the second oil passage 241. The second oil passage 241 connects to the seventh groove 107 through the third lubrication hole 242, and to the eighth groove 108 through the fourth lubrication hole 243. Specifically, lubricating oil flows through the second oil passage 241, then through the third lubrication hole 242 into the seventh groove 107, and through the fourth lubrication hole 243 into the eighth groove 108.
[0054] Furthermore, the diameters of the first lubrication hole 232 and the second lubrication hole 233 are smaller than the diameter of the first oil delivery channel 231. This arrangement can slow down the flow rate of the lubricating oil, control the flow rate of the lubricating oil, and maintain a continuous and stable supply of lubricating oil to the fifth groove 105 and the sixth groove 106.
[0055] Furthermore, the diameters of the third lubrication hole 242 and the fourth lubrication hole 243 are smaller than the diameter of the second oil passage 241. This arrangement slows down the flow rate of the lubricating oil, controls the flow rate of the lubricating oil, and maintains a continuous and stable supply of lubricating oil to the seventh groove 107 and the eighth groove 108.
[0056] In this embodiment, the first oil distribution cap 61 has a first oil distribution passage 612, and the second oil distribution cap 62 has a second oil distribution passage 622. The first inner cavity 611, the first oil distribution passage 612, the fourth oil passage 13, the second oil distribution passage 622, and the second inner cavity 621 are sequentially connected. Specifically, a portion of the lubricating oil supplied by the oil tank flows sequentially through the first inner cavity 611, the first oil distribution passage 612, the fourth oil passage 13, and the second oil distribution passage 622 into the second inner cavity 621, and is then supplied to the seventh bearing 57 and the eighth bearing 58 via the second oil delivery passage 241.
[0057] Furthermore, the first inner cavity 611, the first oil distribution passage 612, the fourth oil passage 13, the second oil distribution passage 622, and the second inner cavity 621 are arranged sequentially from top to bottom. This arrangement, based on the directional flow of lubricating oil achieved by controlling the pressure through the transmission control valve 3, allows the lubricating oil to flow sequentially through the first inner cavity 611, the first oil distribution passage 612, the fourth oil passage 13, and the second oil distribution passage 622 under its own gravity before flowing into the second inner cavity 621, further improving the reliability and stability of the lubricating oil flow. Of course, the directional flow of the lubricating oil can also be achieved using driving components such as an oil pump.
[0058] Furthermore, since the fourth oil passage 13 is a cast structure on the gearbox housing 1 and is installed through the gearbox housing 1, in order to prevent oil leakage from the fourth oil passage 13, the side of the eighth bearing 58 can block the through-hole below the fourth oil passage 13, thereby preventing oil leakage from the fourth oil passage 13 and allowing the lubricating oil to flow strictly in the direction of the first oil distribution passage 612, the fourth oil passage 13, and the second oil distribution passage 622.
[0059] This embodiment also provides a loader. The loader includes the aforementioned gearbox lubrication system and a chassis, with the gearbox housing 1 fixed to the chassis. Applying the aforementioned gearbox lubrication system to the loader provides all the beneficial effects of such a system, namely, simple structure, high reliability, thorough and comprehensive lubrication of internal bearings, effectively reducing the possibility of damage due to insufficient lubrication, ensuring reliable operation of the gearbox at high speeds for extended periods, and reducing the use of external oil pipes and joints, thus lowering costs and facilitating maintenance. Furthermore, it reduces the probability of failure for the loader as a whole, ensuring its long-term reliable and stable operation.
[0060] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A gearbox lubrication system characterized in that, The gearbox shell (1), the input shaft (21), the intermediate shaft (22), the transmission control valve (3) and the transfer case shell (4) are included. The input shaft (21) and the intermediate shaft (22) are arranged in the gearbox shell (1), the first bearing (51), the second bearing (52), the third bearing (53) and the fourth bearing (54) are arranged in the gearbox shell (1), the first bearing (51) and the third bearing (53) are located on the first side of the gearbox shell (1), the second bearing (52) and the fourth bearing (54) are located on the second side of the gearbox shell (1), the input shaft (21) is rotatably connected with the gearbox shell (1) through the first bearing (51) and the second bearing (52), and the intermediate shaft (22) is rotatably connected with the gearbox shell (1) through the third bearing (53) and the fourth bearing (54). The transmission control valve (3) has a first oil channel (31) communicated with an oil tank, the second oil channel (11) communicated with the first oil channel (31) is arranged in the second side of the gearbox shell (1), and the first oil channel (31) and the second oil channel (11) are used for receiving lubricating oil of the oil tank and supplying the lubricating oil to the second bearing (52) and the fourth bearing (54). The transfer case shell (4) is fixed to the first side of the gearbox shell (1) and has an oil return port (41), the third oil channel (12) communicated with the oil return port (41) is arranged in the gearbox shell (1), and the third oil channel (12) is used for receiving lubricating oil of the oil return port (41) and supplying the lubricating oil to the first bearing (51) and the third bearing (53).
2. A gearbox lubrication system according to claim 1, characterised in that, The gearbox shell (1) is provided with the first groove (101), the second groove (102), the third groove (103) and the fourth groove (104), the first bearing (51) is arranged in the first groove (101), the second bearing (52) is arranged in the second groove (102), the third bearing (53) is arranged in the third groove (103), the fourth bearing (54) is arranged in the fourth groove (104), the second oil channel (11) is communicated with the second groove (102) and the fourth groove (104), and the third oil channel (12) is communicated with the first groove (101) and the third groove (103).
3. The gearbox lubrication system of claim 1, wherein, The oil return port (41) is arranged above the third oil channel (12).
4. The gearbox lubrication system of claim 1, wherein, The blocking shaft (23), the second blocking shaft (24), the first oil distribution cover (61) and the second oil distribution cover (62) are further included. The blocking shaft (23), the second blocking shaft (24), the first oil distribution cover (61) and the second oil distribution cover (62) are further included. The first gear shaft (23) and the second gear shaft (24) are arranged in the gearbox shell (1), the gearbox shell (1) is provided with a fifth bearing (55), a sixth bearing (56), a seventh bearing (57) and an eighth bearing (58), the fifth bearing (55) and the seventh bearing (57) are located on the first side of the gearbox shell (1), the sixth bearing (56) and the eighth bearing (58) are located on the second side of the gearbox shell (1), the first gear shaft (23) is rotatably connected with the gearbox shell (1) through the fifth bearing (55) and the sixth bearing (56), and the second gear shaft (24) is rotatably connected with the gearbox shell (1) through the seventh bearing (57) and the eighth bearing (58); The first oil distribution cover (61) and the second oil distribution cover (62) are fixed on the second side of the gearbox shell (1), the first oil distribution cover (61) has a first inner cavity (611), the second oil distribution cover (62) has a second inner cavity (621), the oil tank is communicated with the first inner cavity (611), the gearbox shell (1) is provided with a fourth oil channel (13) communicated with the first inner cavity (611) and the second inner cavity (621), the first gear shaft (23) is provided with a first oil supply channel (231) communicated with the first inner cavity (611), the first oil supply channel (231) is used for receiving lubricating oil in the first inner cavity (611) and supplying the fifth bearing (55) and the sixth bearing (56), and the second gear shaft (24) is provided with a second oil supply channel (241) communicated with the second inner cavity (621), the second oil supply channel (241) is used for receiving lubricating oil in the second inner cavity (621) and supplying the seventh bearing (57) and the eighth bearing (58).
5. A gearbox lubrication system according to claim 4, characterised in that, The gearbox shell (1) is provided with a fifth groove (105), a sixth groove (106), a seventh groove (107) and an eighth groove (108), the fifth bearing (55) is installed in the fifth groove (105), the sixth bearing (56) is installed in the sixth groove (106), the seventh bearing (57) is installed in the seventh groove (107), and the eighth bearing (58) is installed in the eighth groove (108), the first oil supply channel (231) is communicated with the fifth groove (105) and the sixth groove (106), and the second oil supply channel (241) is communicated with the seventh groove (107) and the eighth groove (108).
6. A gearbox lubrication system according to claim 5, characterised in that, The first gear shaft (23) is provided with a first lubricating hole (232) and a second lubricating hole (233) communicated with the first oil supply channel (231), the first oil supply channel (231) is communicated with the fifth groove (105) through the first lubricating hole (232), and the first oil supply channel (231) is communicated with the sixth groove (106) through the second lubricating hole (233). The second gear shaft (24) is provided with a third lubricating hole (242) and a fourth lubricating hole (243) in communication with the second oil channel (241), the seventh groove (107) is communicated with the second oil channel (241) through the third lubricating hole (242), and the eighth groove (108) is communicated with the second oil channel (241) through the fourth lubricating hole (243).
7. A gearbox lubrication system according to claim 6, characterised in that, The first lubricating hole (232) and the second lubricating hole (233) have a smaller diameter than the first oil channel (231), and the third lubricating hole (242) and the fourth lubricating hole (243) have a smaller diameter than the second oil channel (241).
8. The gearbox lubrication system of claim 4, wherein, The first oil distribution cover (61) is provided with a first oil distribution channel (612), and the second oil distribution cover (62) is provided with a second oil distribution channel (622), the first inner cavity (611), the first oil distribution channel (612), the fourth oil channel (13), the second oil distribution channel (622) and the second inner cavity (621) are sequentially communicated.
9. A gearbox lubrication system according to claim 8, characterised in that, The first inner cavity (611), the first oil distribution channel (612), the fourth oil channel (13), the second oil distribution channel (622) and the second inner cavity (621) are sequentially arranged from top to bottom.
10. A loader characterized by The gearbox lubricating system comprises a chassis, and the gearbox shell (1) is fixed on the chassis.