Forced lubrication system for gearbox of electric loader

Abstract

The invention relates to the technical field of gearboxes, in particular to a forced lubrication system for a gearbox of an electric loader. The device comprises a forced lubrication mechanism, an electronic oil pump of the forced lubrication mechanism is arranged on a box body, and oil is extracted from an oil pool at the bottom of the box body through an oil suction pipe; one end of an oil suction pipe is connected with the electronic oil pump, the other end of the oil suction pipe is connected with the box body through an oil suction flange, an oil suction filter is arranged on the oil suction pipe, and two ends of the oil suction filter are respectively connected with the oil suction pipe through a transition joint I and a transition joint II; the oil pressure sensor is arranged on the box body and used for detecting the working state of the forced lubrication mechanism. Forced lubrication is achieved by optimizing the structure of the gearbox and additionally arranging a forced lubrication mechanism, that is, oil is actively pumped through the electronic oil pump, lubricating oil flow with certain pressure is formed, and the oil is conveyed into the gearbox; meanwhile, the forced lubrication mechanism detects the working state of the forced lubrication mechanism, and it is ensured that the gearbox can obtain enough lubricating oil through the oil outlet pipe.

Description

Technical Field

[0001] The present invention relates to the technical field of gearboxes, and in particular to a forced lubrication system for a gearbox of an electric loader. Background Art

[0002] During the operation of the electric loader, the gearbox is the core transmission component. Its internal bearings, gears and other components will generate a lot of friction and heat when running at high speed and bearing heavy loads. If the lubrication problem cannot be effectively solved, the performance and life of the gearbox will be seriously affected. In order to deal with such situations, technical personnel in this field have carried out many studies. For example, the scheme of Chinese patent publication number CN114151535A discloses a gearbox lubrication system. However, the existing technology still has obvious shortcomings. At present, most electric loader gearboxes use splash lubrication, which makes it difficult for the gearbox parts to be fully lubricated. In particular, the lubrication and cooling requirements of high-speed rotating bearings cannot be effectively met, which in turn causes problems such as increased bearing wear and excessive temperature, affecting the normal operation of the gearbox. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a forced lubrication system for a gearbox of an electric loader.

[0004] The technical solution adopted in the present invention is as follows: A forced lubrication system for an electric loader transmission includes a housing, a housing cover, an input shaft assembly, an intermediate shaft assembly, and a forced lubrication mechanism. A sealing gasket is provided between the housing and the housing cover, and the housing and the housing cover are tightly connected by bolts I and II. The forced lubrication mechanism includes the following components: The electronic oil pump is installed on the box body and draws oil from the oil pool at the bottom of the box body through the oil suction pipe. One end of the oil suction pipe is connected to the electronic oil pump, and the other end is connected to the box body through the oil suction flange. An oil suction filter is installed on the oil suction pipe, and the two ends of the oil suction filter are connected to the oil suction pipe through transition joints I and II respectively. The oil pressure sensor is installed on the box body and is used to detect the working status of the forced lubrication mechanism; The oil outlet pipe has one end connected to the electronic oil pump and the other end connected to the input shaft assembly and the intermediate shaft assembly.

[0005] This technical solution achieves forced lubrication by optimizing the gearbox structure and adding a forced lubrication mechanism. That is, the electronic oil pump actively extracts oil to form a lubricating oil flow with a certain pressure, and delivers the oil to the gearbox. At the same time, the forced lubrication mechanism detects the working status of the forced lubrication mechanism and uses the oil outlet pipe to ensure that the gearbox can obtain sufficient lubricating oil. Specifically, the electronic oil pump is driven by an electric motor to form a negative pressure inside. Under the action of the pressure difference, the oil in the oil pool at the bottom of the casing is sucked into the electronic oil pump through the oil suction pipe; the oil suction filter intercepts metal particles, dust and other impurities in the oil with a filter or filter element to ensure that the oil entering the electronic oil pump and subsequent systems is clean; the oil pressure sensor monitors the oil pressure of the lubrication system in real time. Once the oil pressure is abnormal, such as too high or too low, an alarm will be issued to remind the operator to check the fault; the electronic oil pump delivers the filtered oil to the input shaft assembly and the intermediate shaft assembly through the oil outlet pipe; the oil outlet pipe adopts a branching structure to ensure that the lubricating oil is evenly distributed to each lubrication point; after the oil arrives, the bearings, gears and other key parts of the input shaft assembly and the intermediate shaft assembly are fully lubricated to reduce friction and wear and ensure the normal operation of the gearbox; the lubricated oil flows back to the oil pool at the bottom of the casing to form a circulation.

[0006] In addition, the above-mentioned forced lubrication system for the electric loader gearbox according to the present invention also has the following additional technical features: According to one embodiment of the present invention, the oil suction filter is used to filter the oil before it enters the electronic oil pump, remove impurities in the oil, and ensure the cleanliness of the oil entering the forced lubrication mechanism.

[0007] According to one embodiment of the present invention, an oil through bolt is provided on the housing, an oil through hole I is provided on the oil through bolt, and the oil outlet pipe is connected to the oil through hole I; the oil enters the interior of the oil through bolt through the oil through hole I, and then passes through the channel on the oil through plug, so that sufficient oil enters the input shaft assembly.

[0008] In this technical solution, the input shaft assembly's speed, load, and other parameters constantly change during operation, leading to changes in lubricating oil requirements. For example, when the input shaft assembly's speed and load increase, the electronic oil pump increases its output power, increasing the oil flow and pressure, and delivering more oil to the input shaft assembly via the oil vent bolts and oil vent plugs to meet its higher lubrication requirements. Conversely, when the input shaft assembly operates more steadily, the electronic oil pump reduces its output power, reducing oil supply and avoiding energy waste. The oil vent bolts and oil vent plugs ensure that oil is accurately delivered to the areas requiring lubrication, improving lubrication effectiveness.

[0009] According to one embodiment of the present invention, the input shaft assembly is provided with a clutch sleeve shift mechanism, and a needle roller bearing and needle roller bearing sleeve assembly are disposed between the clutch sleeve shift mechanism and the input shaft assembly. Oil forcibly lubricates the needle roller bearing and needle roller bearing sleeve assembly. The housing is provided with an oil hole II, and an oil outlet pipe is connected to oil hole II. Oil enters the housing through oil hole II and then enters through oil holes III and IV, forcibly lubricating the bearings on the intermediate shaft assembly.

[0010] According to one embodiment of the present invention, the housing is provided with an oil sump, which is connected to the lubrication aperture. During the lubrication process, some oil flows into the sump and then enters the lubrication area of ​​the right / left bearing of the input shaft assembly through the lubrication aperture. A lip seal is provided on the input shaft assembly to prevent oil leakage and ensure continuous and stable lubrication of the right / left bearing of the input shaft assembly.

[0011] According to one embodiment of the present invention, an oil return hole is provided on the box body, and the oil return hole is connected to the oil circuit of the travel motor; after the oil lubricates the gearbox components, the excess oil and the oil flowing out of the travel motor return to the oil pool of the box body through the oil return hole, thereby realizing the recycling of the oil.

[0012] According to one embodiment of the present invention, the oil pressure sensor detects the working status of the forced lubrication mechanism in real time, and issues a warning signal in a timely manner when an abnormal oil pressure occurs.

[0013] Compared with the prior art, the present invention has the following beneficial effects: By optimizing the gearbox structure, a new forced lubrication mechanism is added to achieve forced lubrication. That is, the oil is actively extracted through an electronic oil pump to form a lubricating oil flow with a certain pressure, and the oil is transported to the gearbox. At the same time, the forced lubrication mechanism detects the working status of the forced lubrication mechanism and uses the oil outlet pipe to ensure that the gearbox can get enough lubricating oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a cross-sectional view of the present invention.

[0015] Figure 2 It is a left side view of the present invention.

[0016] Figure 3 It is the AA view of the present invention.

[0017] Figure 4 It is a partial enlarged view of the present invention.

[0018] In the figure: 1. Sealing gasket; 2. Box cover; 3. Electronic oil pump; 4. Oil hole I; 5. Oil bolt; 6. Oil pressure sensor; 7. Oil plug; 8. Lubricating oil hole I; 9. Oil hole II; 10. Lubricating oil hole II; 11. Input shaft assembly; 12. Oil hole III; 13. Oil hole IV; 14. Intermediate shaft assembly; 15. Oil suction pipe; 16. Bolt I; 17. Oil outlet pipe; 18. Transition joint I; 19. Oil suction filter; 20. Transition joint II; 21. Box body; 22. Oil suction flange; 23. Adjustable joint; 24. Bolt II; 25. Bearing; 26. Lip seal; 27. Oil collecting trough; 28. Lubricating hole; 29. ​​Oil return hole. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0020] Example 1 like Figures 1 to 4 As shown, this embodiment provides a forced lubrication system for an electric loader transmission, including a housing 21, a housing cover 2, an input shaft assembly 11, an intermediate shaft assembly 14, and a forced lubrication mechanism. A sealing gasket 1 is provided between the housing 21 and the housing cover 2, and the housing 21 and the housing cover 2 are tightly connected by bolts I 16 and II 24. The forced lubrication mechanism includes the following components: The electronic oil pump 3 is mounted on the housing 21 and draws oil from the oil pool at the bottom of the housing 21 via an oil suction pipe 15. One end of the oil suction pipe 15 is connected to the electronic oil pump 3, and the other end is connected to the housing 21 via an oil suction flange 22. An oil suction filter 19 is mounted on the oil suction pipe 15, and both ends of the oil suction filter 19 are connected to the oil suction pipe 15 via a transition joint I 18 and a transition joint II 20, respectively. The oil pressure sensor 6 is provided on the box body 21 and is used to detect the working status of the forced lubrication mechanism; The oil outlet pipe 17 has one end connected to the electronic oil pump 3 , and the other end connected to the input shaft assembly 11 and the intermediate shaft assembly 14 .

[0021] like Figures 1 to 4As shown, this technical solution achieves forced lubrication by optimizing the gearbox structure and adding a forced lubrication mechanism, that is, the electronic oil pump 3 actively extracts oil to form a lubricating oil flow with a certain pressure, and delivers the oil to the gearbox; at the same time, the forced lubrication mechanism detects the working status of the forced lubrication mechanism and uses the oil outlet pipe 17 to ensure that the gearbox can obtain sufficient lubricating oil. Specifically, the electronic oil pump 3 is driven by an electric motor to form a negative pressure inside. Under the action of the pressure difference, the oil in the oil pool at the bottom of the casing 21 is sucked into the electronic oil pump 3 through the oil suction pipe 15; the oil suction filter 19 intercepts metal particles, dust and other impurities in the oil through the filter screen or filter element to ensure that the oil entering the electronic oil pump 3 and subsequent systems is clean; the oil pressure sensor 6 monitors the oil pressure of the lubrication system in real time. Once the oil pressure is abnormal, such as too high or too low, an alarm will be issued to remind the operator to check the fault; the electronic oil pump 3 delivers the filtered oil to the input shaft assembly 11 and the intermediate shaft assembly 14 through the oil outlet pipe 17; the oil outlet pipe 17 adopts a branch structure to ensure that the lubricating oil is evenly distributed to each lubrication point; after the oil arrives, the bearings 25, gears and other key parts of the input shaft assembly 11 and the intermediate shaft assembly 14 are fully lubricated to reduce friction and wear and ensure the normal operation of the gearbox; the lubricated oil flows back to the oil pool at the bottom of the casing 21 to form a circulation.

[0022] In addition, the above-mentioned forced lubrication system for the electric loader gearbox according to the present invention also has the following additional technical features: According to one embodiment of the present invention, the oil suction filter 19 is used to filter the oil before it enters the electronic oil pump 3 to remove impurities in the oil and ensure the cleanliness of the oil entering the forced lubrication mechanism.

[0023] According to one embodiment of the present invention, an oil through bolt 5 is provided on the box body 21, and an oil through hole Ⅰ4 is provided on the oil through bolt 5, and the oil outlet pipe 17 is connected to the oil through hole Ⅰ4; the oil enters the interior of the oil through bolt 5 through the oil through hole Ⅰ4, and then passes through the channel on the oil through plug 7, so that sufficient oil enters the input shaft assembly 11.

[0024] In this technical solution, during operation, the input shaft assembly 11's speed, load, and other parameters constantly change, leading to changes in the lubricating oil demand. For example, when the speed and load of the input shaft assembly 11 increase, the electronic oil pump 3 increases its output power, increasing the oil flow and pressure, and delivering more oil to the input shaft assembly 11 via the oil vent bolt 5 and oil vent plug 7 to meet its higher lubrication requirements. Conversely, when the input shaft assembly 11 operates more smoothly, the electronic oil pump 3 reduces its output power, reducing the oil supply and avoiding energy waste. The oil vent bolt 5 and oil vent plug 7 ensure that the oil is accurately delivered to the parts requiring lubrication, improving lubrication effectiveness.

[0025] According to one embodiment of the present invention, the input shaft assembly 11 is equipped with a clutch-sleeve shift mechanism. A needle roller bearing 25 and a needle roller bearing sleeve assembly are interposed between the clutch-sleeve shift mechanism and the input shaft assembly 11. Oil forcibly lubricates the needle roller bearing 25 and the needle roller bearing sleeve assembly. The housing 21 is provided with an oil hole II9, and the oil outlet pipe 17 is connected to the oil hole II9. Oil enters the housing 21 through the oil hole II9 and then enters through the oil holes III12 and IV13, forcibly lubricating the bearing 25 on the intermediate shaft assembly 14.

[0026] According to one embodiment of the present invention, the housing 21 is provided with an oil collecting trough 27, which is connected to a lubrication hole 28. During the lubrication process, some oil flows into the oil collecting trough 27 and then enters the lubrication area of ​​the right / left bearing 25 of the input shaft assembly 11 through the lubrication hole 28. The input shaft assembly 11 is provided with a lip seal 26 to prevent oil leakage and ensure continuous and stable lubrication of the right / left bearing 25 of the input shaft assembly 11.

[0027] According to one embodiment of the present invention, an oil return hole 29 is provided on the box body 21, and the oil return hole 29 is connected to the oil circuit of the travel motor; after the oil lubricates the gearbox components, the excess oil and the oil flowing out of the travel motor return to the oil pool of the box body 21 through the oil return hole 29, thereby realizing the recycling of the oil.

[0028] According to one embodiment of the present invention, the oil pressure sensor 6 detects the working status of the forced lubrication mechanism in real time, and issues a warning signal in a timely manner when an oil pressure anomaly occurs.

[0029] In addition, if Figures 1 to 4 As shown, the electronic oil pump 3 actively draws oil, creating a pressurized flow that branches through the oil outlet pipe 17 and evenly distributes it to various lubrication points, providing adequate lubrication for key components, reducing friction and wear, and ensuring normal transmission operation. The oil supply can also be adjusted based on the operating conditions of the input shaft assembly 11, avoiding energy waste. The oil suction filter 19 filters impurities from the oil, ensuring clean oil entering the system. The oil pressure sensor 6 monitors oil pressure in real time, providing prompt alerts when abnormalities occur, facilitating troubleshooting and ensuring stable operation of the lubrication system. The oil vent bolt 5, oil plug 7, and oil sump 27 ensure precise oil delivery to each lubrication area. The oil return hole 29 enables oil recycling, improving resource utilization and reducing operating costs.

[0030] The usage process of the above embodiment is as follows: Figures 1 to 4As shown, the electronic oil pump 3 is driven by the motor to form a negative pressure inside. Under the action of the pressure difference, the oil in the oil pool at the bottom of the box 21 is sucked into the electronic oil pump 3 through the oil suction pipe 15. The oil suction filter 19 intercepts impurities in the oil to ensure the oil is clean; after the filtered oil enters the electronic oil pump 3, it is transported through the oil outlet pipe 17. The oil outlet pipe 17 branches to evenly distribute the oil; the oil enters the input shaft assembly 11 through the oil hole I4 and the oil plug 7 channel to lubricate the needle roller bearing 25 and other components between the gear shift mechanism and the input shaft assembly 11; through the oil hole II9, the oil plug 7 Oil holes III 12 and IV enter the intermediate shaft assembly 14 to lubricate its bearings 25; part of the oil flows into the oil collecting tank 27, and then lubricates the bearings 25 on both sides of the input shaft assembly 11 through the lubrication holes 28; the lip seal 26 prevents oil leakage to ensure continuous and stable lubrication of the bearings 25; the oil pressure sensor 6 monitors the oil pressure in real time and issues an alarm in case of abnormality; the excess oil after lubrication and the oil flowing out of the travel motor are returned to the oil pool of the box 21 through the oil return hole 29, realizing oil recycling. At the same time, the electronic oil pump 3 can adjust the oil supply according to the changes in the working conditions of the input shaft assembly 11.

[0031] Although the present invention is described in detail with reference to the accompanying drawings and in combination with preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, a person of ordinary skill in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and such modifications or substitutions shall be within the scope of the present invention. Any person skilled in the art who can easily conceive of changes or substitutions within the technical scope disclosed in the present invention shall be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope of protection of the claims.

Claims

1. A forced lubrication system for an electric loader gearbox, characterized in that: The invention comprises a box body (21), a box cover (2), an input shaft assembly (11), an intermediate shaft assembly (14), and a forced lubrication mechanism, wherein a sealing gasket (1) is provided between the box body (21) and the box cover (2), and the box body (21) and the box cover (2) are tightly connected by bolts I (16) and bolts II (24). The forced lubrication mechanism comprises the following components: An electronic oil pump (3) is provided on the housing (21) and extracts oil from the oil pool at the bottom of the housing (21) through an oil suction pipe (15); one end of the oil suction pipe (15) is connected to the electronic oil pump (3), and the other end is connected to the housing (21) through an oil suction flange (22); an oil suction filter (19) is provided on the oil suction pipe (15), and both ends of the oil suction filter (19) are connected to the oil suction pipe (15) through a transition joint I (18) and a transition joint II (20) respectively; An oil pressure sensor (6) is provided on the housing (21) and is used to detect the working state of the forced lubrication mechanism; An oil outlet pipe (17) has one end connected to the electronic oil pump (3) and the other end connected to the input shaft assembly (11) and the intermediate shaft assembly (14).

2. The electric loader gearbox forced lubrication system according to claim 1, characterized in that: The oil suction filter (19) is used to filter the oil before it enters the electronic oil pump (3), remove impurities in the oil, and ensure the cleanliness of the oil entering the forced lubrication mechanism.

3. The electric loader gearbox forced lubrication system according to claim 1, characterized in that: The box body (21) is provided with an oil through bolt (5), and an oil through hole I (4) is provided on the oil through bolt (5). The oil outlet pipe (17) is connected to the oil through hole I (4); the oil enters the interior of the oil through bolt (5) through the oil through hole I (4), and then passes through the channel on the oil through screw plug (7), so that sufficient oil enters the input shaft assembly (11).

4. The electric loader gearbox forced lubrication system according to claim 3, characterized in that: The input shaft assembly (11) is provided with an engagement sleeve shift mechanism, a needle roller bearing (25) and a needle roller bearing sleeve assembly are provided between the engagement sleeve shift mechanism and the input shaft assembly (11), and oil is used to forcibly lubricate the needle roller bearing (25) and the needle roller bearing sleeve assembly.

5. The electric loader gearbox forced lubrication system according to claim 1 or 3, characterized in that: The housing (21) is provided with an oil hole II (9), and an oil outlet pipe (17) is connected to the oil hole II (9); oil enters the housing (21) through the oil hole II (9), and then enters through the oil holes III (12) and the oil holes IV (13), forcing lubrication of the bearing (25) on the intermediate shaft assembly (14).

6. The electric loader gearbox forced lubrication system according to claim 5, characterized in that: The housing (21) is provided with an oil collecting groove (27), which is connected to the lubrication hole (28); during the lubrication process, part of the oil will flow into the oil collecting groove (27) and then enter the lubrication area of ​​the right / left bearing (25) of the input shaft assembly (11) through the lubrication hole (28).

7. The electric loader gearbox forced lubrication system according to claim 3, characterized in that: The input shaft assembly (11) is provided with a lip seal ring (26), which prevents oil leakage and ensures that the right / left bearings (25) of the input shaft assembly (11) are continuously and stably lubricated.

8. The electric loader gearbox forced lubrication system according to claim 1 or 3, characterized in that: The box (21) is provided with an oil return hole (29), which is connected to the oil circuit of the travel motor; after the oil lubricates the gearbox components, the excess oil and the oil flowing out of the travel motor flow back to the oil pool of the box (21) through the oil return hole (29), thereby realizing the recycling of the oil.

9. The electric loader gearbox forced lubrication system according to claim 1, characterized in that: The oil pressure sensor (6) detects the working state of the forced lubrication mechanism in real time and issues a warning signal in time when an oil pressure anomaly occurs.

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