Speed change gear box with lubricating oil way

Abstract

The invention discloses a speed change gear box with a lubricating oil way, and relates to the field of speed change gear boxes, the side wall of a first gear is coaxially and fixedly connected with a bottom plate, the bottom plate is fixedly connected with a cover plate in the direction away from the first gear, and lubricating oil can be contained between the cover plate and the bottom plate; the third shell is fixedly connected with a pipeline for supplying oil to the position between the cover plate and the bottom plate, and an oil feeding assembly for pumping the lubricating oil to the top face of the third gear is arranged below the first gear. The top of the third gear is fixedly connected with another dispersing assembly used for dispersing lubricating oil, and the bottom end of the first shell is fixedly connected with a liquid outlet used for discharging the lubricating oil. According to the gear lubricating device, a good lubricating effect is achieved while the gear is cooled, the situation that an oil film on the surface of the gear is broken is effectively avoided, and then the good lubricating effect on the gear is achieved.

Description

Technical Field

[0001] The invention relates to the field of speed change gear boxes, in particular to a speed change gear box with a lubricating oil circuit. Background Art

[0002] A speed gearbox is a mechanical device that adjusts the power output speed and torque by changing the gear combination. It achieves a change in the speed ratio between the input shaft and the output shaft through the meshing of gears of different sizes. It is widely used in transportation, industry and new energy fields by flexibly adjusting the speed and torque.

[0003] Splash lubrication is one of the most common lubrication methods in speed gearboxes. The principle is to immerse the gears in lubricating oil and lubricate the gears and bearings through the oil splashed when the gears rotate.

[0004] The oil supply of splash lubrication is difficult to control accurately, and the lubrication effect is affected by many factors such as gear speed, oil volume in the oil pool, and oil viscosity. For example, when the gear speed is too high, it may cause excessive splashing of lubricating oil and form a large amount of foam, causing the oil film layer on the gear to rupture, thereby reducing the lubrication effect. In summary, it is not easy for existing speed change gearboxes to adequately lubricate the gears. Summary of the invention

[0005] Based on this, an object of the present invention is to provide a speed change gear box with a lubricating oil circuit to solve the technical problem that the existing speed change gear box is difficult to sufficiently lubricate the gears.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a speed change gear box with a lubricating oil circuit, comprising a vertically arranged first gear, a side wall of the first gear being coaxially fixedly connected to a bottom plate, a cover plate being fixedly connected to the bottom plate in a direction away from the first gear, lubricating oil being able to be accommodated between the cover plate and the bottom plate, and a spreading component for spreading the lubricating oil on the tooth surface of the first gear being arranged at the edge, and also comprising a third shell, the third shell being fixedly connected to a pipeline for supplying oil between the cover plate and the bottom plate, and also comprising a horizontally arranged third gear, an oil delivery component for pumping the lubricating oil to the top surface of the third gear being arranged below the first gear, another spreading component for spreading the lubricating oil being fixedly connected to the top of the third gear, and also comprising a first shell, a drain port for discharging the lubricating oil being fixedly connected to the bottom end of the first shell.

[0007] By adopting the above technical solution, the lubricating oil is evenly spread on the adjacent gear surface after being sprayed out from the liquid outlet, which cools the gear and has a good lubricating effect, effectively avoiding the rupture of the oil film on the gear surface, thereby achieving a good lubrication effect for the gear.

[0008] The present invention is further configured such that the top end of the first shell is fixedly connected to the second shell, one side of the second shell is fixedly connected to the third shell, two first gears and two second gears are rotatably connected between the third shell and the second shell, the two first gears are coaxially arranged, the two second gears are coaxially arranged, the spacing between the two first gears is greater than the tooth width of the second gear, the second gear is located obliquely above the first gear, and when the gear box is working, only one pair of first gears and second gears are meshed with each other at the same time.

[0009] Preferably, the speed change transmission of the gear box is achieved by switching the second gear to mesh with different first gears.

[0010] The present invention is further configured such that two of the first gears are provided with base plates facing each other, the base plates are fixedly connected with cover plates facing each other, a liquid guide ring with a diameter larger than the rotating shaft of the first gear is provided at the center of the cover plate, sealing rings are provided at intervals on the edge of the base plate, gaps are provided between adjacent sealing rings, and a liquid outlet is provided at the position of the edge of the cover plate corresponding to the gap.

[0011] Preferably, the lubricating oil between the bottom plate and the cover plate is sprayed out through the liquid outlet due to centrifugal force when the first gear rotates.

[0012] The present invention is further configured as follows: the outer wall of the cover plate is rotatably connected to a centrifugal rod at an annular interval, the axis of the centrifugal rod rotating shaft is parallel to the axis of the first gear rotating shaft, the end of the centrifugal rod away from its own rotating shaft is rotatably connected to a rotating rod, the axis of the rotating rod rotating shaft is orthogonal to the axis of the corresponding centrifugal rod rotating shaft, a torsion spring is arranged at the rotating shaft of the rotating rod, the torsion spring is not compressed when the rotating rod and the centrifugal rod are in contact with each other, the rotating rod can be rotated to a state where it is in the same straight line with the centrifugal rod under its own centrifugal force when the first gear rotates, the end of the rotating rod away from its own rotating shaft is fixedly connected to a baffle, the baffle is used to spread the lubricating oil sprayed from the liquid outlet to the surface of the first gear, and when the rotating rod and the centrifugal rod are in the same straight line, the diameter of the baffle is greater than the diameter of the first gear.

[0013] Preferably, the lubricating oil sprayed out from the liquid outlet is evenly distributed to the tooth surface of the first gear after being blocked by the baffle.

[0014] The present invention is further configured such that a mounting plate is fixedly connected to the side wall of the third shell, and the mounting plate is respectively connected to a first infusion tube and a second infusion tube, and the first infusion tube and the second infusion tube respectively lead to liquid guide rings of two cover plates.

[0015] Preferably, lubricating oil is delivered to the gears in the gear box that are in working state through the first infusion pipe or the second infusion pipe.

[0016] The present invention is further configured such that a heating cylinder for wrapping the first infusion tube and the second infusion tube is fixedly connected inside the first shell, and a heating component for heating the lubricant inside the first infusion tube and the second infusion tube is arranged inside the heating cylinder.

[0017] Preferably, a heating cylinder is used to heat the lubricating oil flowing into the gearbox when the speed change gearbox is cold started, so as to improve the fluidity of the lubricating oil and help the lubricating oil to better cover the gears that need lubrication.

[0018] The present invention is further configured such that a transfer pump is fixedly connected to the inner wall of the second shell, and the inlet and outlet of the transfer pump are respectively connected to a liquid extraction pipe leading to the bottom end of the third shell and a liquid delivery pipe leading to the top surface of the third gear.

[0019] Preferably, a transfer pump is used to transfer the lubricating oil between the second housing and the third housing to prevent the lubricating oil from accumulating in the second housing and the third housing and affecting the rotation of the first gear.

[0020] The present invention is further configured such that the rotating shaft of the first gear extends between the first shell and the second shell and is fixedly connected to a bevel gear, the third gear and the bevel gear are meshed with each other, the top surface of the third gear is fixedly connected to a accommodating disk, the edge of the accommodating disk is provided with a chamfer inclined downward, and a support rod is fixedly connected to the top of the edge in a ring shape, the top of the support rod is fixedly connected to a retaining ring, the height of the top of the accommodating disk is higher than the height of the top of the third gear, and the retaining ring is used to block the lubricating oil leaving the accommodating disk to the tooth surface of the third gear.

[0021] Preferably, when the lubricating oil in the receiving plate overflows, a portion of it flows along the bevel chamfer to the conical surface of the bevel gear, while another portion of it is thrown out due to centrifugal force. The retaining ring blocks this portion of the lubricating oil and allows this portion of the lubricating oil to flow to the tooth surface of the third gear, thereby achieving good lubrication of the third gear.

[0022] The present invention is further configured such that a collecting groove for containing lubricating oil is provided in the first housing at a position lower than the third gear, and the bottom end of the collecting groove is connected to a drain port extending out of the first housing.

[0023] Preferably, the lubricating oil flowing along the tooth surface of the third gear and thrown to the inner walls of the first housing and the second housing flows downward into the collecting tank due to its own gravity, and is finally discharged through the drain port.

[0024] The present invention is further configured such that the outer wall of the second shell is fixedly connected to a temperature measuring probe inserted into the second shell.

[0025] Preferably, a temperature measuring probe is used to detect the temperature inside the gear box to determine whether it is necessary to activate external components such as plate heat exchangers.

[0026] In summary, the present invention mainly has the following beneficial effects: 1. The present invention installs an oil delivery structure that fits the gear in the gear box, and uses the centrifugal force when the gear rotates to unfold a baffle for spreading the lubricating oil. After the lubricating oil is sprayed out from the liquid outlet, it is blocked by the baffle and evenly spread on the adjacent gear surface, which cools the gear and has a good lubrication effect, effectively avoiding the oil film on the gear surface from rupture, thereby achieving a good lubrication effect for the gear.

[0027] 2. The present invention uses different lubricating oil delivery pipelines to deliver lubricating oil to the working gears, so that the lubricating oil in the gear box can accurately lubricate the gears that need lubrication, effectively improving the accuracy of the lubricating oil for the gears in the gear box.

[0028] 3. The present invention installs a pump body for transferring lubricating oil in the gear box to transfer the lubricating oil that has lubricated the first gear and the second gear to the third gear, thereby preventing the first gear from stirring the lubricating oil in the housing and generating foam when rotating. The lubricating oil transferred to the third gear is evenly spread to the tooth surface of the third gear by utilizing the centrifugal force generated by the rotation of the third gear and the retaining ring, thereby cooling the third gear and the gears meshing with it while playing a good lubricating role.

[0029] 4. The present invention evenly spreads lubricating oil on the surfaces of the first gear and the third gear, so that the lubricating oil is circulated and thrown out to the inner wall of the shell while keeping the oil film intact. Part of the heat of the lubricating oil is directly transferred to the air through heat conduction of the shell, thereby effectively improving the autonomous cooling ability of the speed change gear and reducing the startup frequency of the external plate radiator of the gear box. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A perspective view of the present invention; Figure 2 Another perspective perspective diagram of the present invention; Figure 3 For the present invention Figure 2 A magnified view of middle; Figure 4 It is a three-dimensional diagram of the internal structure of the second shell of the present invention; Figure 5 A three-dimensional diagram of the internal structure of the second housing from another perspective of the present invention; Figure 6 A three-dimensional diagram of the internal structure of the second housing after the first gear and the second gear are removed according to the present invention; Figure 7 For the present invention Figure 6 Enlarged view of middle B; Figure 8 It is an explosion schematic diagram of the first gear of the present invention in a rotating state; Fig. 9 This is a schematic diagram of an explosion when the first gear is in a rotating state from another perspective of the present invention; Fig.10 It is a front view of the cross-section state of the third gear and the receiving plate of the present invention; Fig.11 This is a three-dimensional diagram of the first gear of the present invention in a non-rotating state.

[0031] Description of reference numerals: 1. First shell; 101. Collecting tank; 102. Liquid discharge port; 2. Second shell; 201. Temperature probe; 3. Third shell; 301. Mounting plate; 4. First gear; 5. Second gear; 6. Third gear; 7. Heating cylinder; 8. First infusion tube; 9. Second infusion tube; 10. First wire; 11. Second wire; 12. Transfer pump; 13. Liquid extraction tube; 14. Liquid delivery tube; 15. Bottom plate; 1501. Sealing ring; 1502. Notch; 16. Cover plate; 1601. Liquid guide ring; 1602. Liquid retaining plate; 1603. Liquid outlet; 17. Centrifugal rod; 18. Rotating rod; 19. Retaining plate; 20. Counterweight; 21. Receiving plate; 22. Support rod; 23. Retaining ring. DETAILED DESCRIPTION

[0032] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0033] The following describes an embodiment of the present invention based on its overall structure.

[0034] First embodiment: A speed change gearbox with a lubricating oil circuit, see Figure 1-11 , including a vertically arranged first gear 4. Specifically, in the present embodiment, a total of two sets of variable speed gear sets that can mesh with each other are arranged in the gear box. The side wall of the first gear 4 is coaxially fixedly connected with a bottom plate 15. The bottom plate 15 is fixedly connected with a cover plate 16 in a direction away from the first gear 4. Lubricating oil can be accommodated between the cover plate 16 and the bottom plate 15, and a spreading component for spreading the lubricating oil on the tooth surface of the first gear 4 is arranged at the edge. Specifically, the spreading component includes a baffle 19.

[0035] Specifically, two second gears 5 that can slide and adjust their positions along the axial direction are provided between the first shell 1 and the second shell 2. The two second gears 5 can respectively engage with the corresponding first gear 4, and the engaging position is located obliquely above the first gear 4. The specific steps of switching the engaging states of different second gears 5 and the first gear 4 are well known to those skilled in the art and will not be elaborated here.

[0036] It also includes a third shell 3, which is fixedly connected with a pipeline for supplying oil between the cover plate 16 and the bottom plate 15. Specifically, the pipeline includes a first infusion pipe 8 and a second infusion pipe 9. The first infusion pipe 8 and the second infusion pipe 9 are respectively directed to two different cover plates 16. Specifically, the first infusion pipe 8 and the second infusion pipe 9 are respectively directed to the liquid guide ring 1601 in the center of two different cover plates 16.

[0037] It also includes a horizontally arranged third gear 6, and an oil delivery assembly for pumping the lubricating oil to the top surface of the third gear 6 is arranged below the first gear 4. Specifically, the oil delivery assembly includes a transfer pump 12, and the top of the third gear 6 is fixedly connected to another spreading assembly for spreading the lubricating oil. The spreading assembly here specifically includes a receiving plate 21, and also includes a first shell 1, and the bottom end of the first shell 1 is fixedly connected to a drain port 102 for discharging the lubricating oil.

[0038] In the above embodiments, please refer to Figure 4-6 The top of the first shell 1 is fixedly connected to the second shell 2, and one side of the second shell 2 is fixedly connected to the third shell 3. Two first gears 4 and two second gears 5 are rotatably connected between the third shell 3 and the second shell 2. The two first gears 4 are coaxially arranged, and the two second gears 5 are coaxially arranged. In order to avoid possible tooth collision problems when changing speed, after the gear box gradually slows down to a state of stopping working, the second gear 5 slides and switches the meshing of different gears.

[0039] Specifically, the distance between the two first gears 4 is greater than the tooth width of the second gear 5 to avoid the two sets of gears from meshing at the same time. The second gear 5 is located diagonally above the first gear 4. When the gear box is working, only one pair of first gears 4 and second gears 5 are meshed with each other at the same time. The gear box can achieve variable speed transmission by switching the second gear 5 to mesh with different first gears 4.

[0040] In the above embodiments, please refer to Figure 1-7 A collecting groove 101 for containing lubricating oil is provided in the first housing 1 at a position lower than the third gear 6. The bottom end of the collecting groove 101 is connected to a drain port 102 extending from the first housing 1. The lubricating oil flowing along the tooth surface of the third gear 6 and thrown to the inner walls of the first housing 1 and the second housing 2 flows downward into the collecting groove 101 under its own gravity, and is finally discharged through the drain port 102.

[0041] In the above embodiments, please refer to Figure 5-9 , Fig.11The two first gears 4 are provided with bottom plates 15 facing each other, and the bottom plates 15 are fixedly connected with cover plates 16 facing each other. The center of the cover plate 16 is provided with a liquid guide ring 1601 whose diameter is larger than the rotating shaft of the first gear 4. Specifically, the liquid outlet ends of the first infusion tube 8 and the second infusion tube 9 are facing the liquid guide ring 1601, and the lubricating oil sprayed from the first infusion tube 8 and the second infusion tube 9 directly passes through the liquid guide ring 1601 and enters the space between the cover plate 16 and the bottom plate 15.

[0042] Sealing rings 1501 are arranged at intervals on the edge of the bottom plate 15. The sealing rings 1501 can ensure that the lubricating oil does not leak from a position other than the liquid outlet 1603 during the rotation of the first gear 4. A gap 1502 is arranged between adjacent sealing rings 1501. A liquid outlet 1603 is arranged at a position on the edge of the cover plate 16 corresponding to the gap 1502. When the first gear 4 rotates, the lubricating oil between the bottom plate 15 and the cover plate 16 is sprayed out through the liquid outlet 1603 due to centrifugal force.

[0043] Furthermore, an inclined liquid blocking sheet 1602 is fixedly connected to the inside of the cover plate 16. When the base plate 15 and the cover plate 16 are in a closed state, the side of the liquid blocking sheet 1602 away from the cover plate 16 is in close contact with the base plate 15. The lubricating oil flowing toward the edge of the first gear 4 under the centrifugal force can be guided by the liquid blocking sheet 1602 and flow out from the liquid outlet 1603 faster, thereby avoiding excessive lubricating oil accumulation between the base plate 15 and the cover plate 16 to affect the rotation balance of the first gear 4.

[0044] In the above embodiments, please refer to Figure 4-9 , Fig.11 The outer wall of the cover plate 16 is rotatably connected with a centrifugal rod 17 at an annular interval, the axis of the rotating shaft of the centrifugal rod 17 is parallel to the axis of the rotating shaft of the first gear 4, and the end of the centrifugal rod 17 away from its own rotating shaft is rotatably connected with a rotating rod 18, the axis of the rotating shaft of the rotating rod 18 is orthogonal to the axis of the corresponding rotating shaft of the centrifugal rod 17, and a torsion spring is arranged at the rotating shaft of the rotating rod 18, and the torsion spring is not compressed when the rotating rod 18 and the centrifugal rod 17 are in contact with each other. Specifically, the centrifugal rod 17 is in a naturally drooping state when the first gear 4 is not rotating, and the rotating rod 18 is kept in contact with the centrifugal rod 17 by the torsion spring force at its own rotating shaft, thereby avoiding interference with the movement of the second gear 5.

[0045] Furthermore, when the first gear 4 rotates, the rotating rod 18 can be rotated to a state where it is in the same straight line with the centrifugal rod 17 due to its own centrifugal force. The end of the rotating rod 18 away from its own rotating shaft is fixedly connected to a baffle 19. The baffle 19 is used to spread the lubricating oil sprayed from the liquid outlet 1603 to the surface of the first gear 4. When the rotating rod 18 and the centrifugal rod 17 are in the same straight line, the diameter of the position of the baffle 19 is greater than the diameter of the first gear 4. The lubricating oil sprayed from the liquid outlet 1603 is blocked by the baffle 19 and then evenly spread to the tooth surface of the first gear 4.

[0046] Specifically, when the lubricating oil dispersed on the tooth surface of the first gear 4 accumulates too much, it will be thrown out by its own centrifugal force. The lubricating oil thrown to the inner wall of the second shell 2 and the third shell 3 exchanges heat with the shell wall, and the heat is efficiently transferred to the shell. Then, the heat is dissipated autonomously through the fin structure on the outer wall of the shell, which effectively improves the autonomous heat dissipation capacity of the gear box.

[0047] In the above embodiments, please refer to Figure 2-7 The side wall of the third housing 3 is fixedly connected with a mounting plate 301, and the mounting plate 301 is respectively connected with a first infusion pipe 8 and a second infusion pipe 9, which are respectively connected to the liquid guide rings 1601 of the two cover plates 16, and the lubricating oil is delivered to the gears in the working state in the gear box through the first infusion pipe 8 or the second infusion pipe 9. Since there is only one set of the first gear 4 and the second gear 5 meshing and working in the gear box at the same time, the lubricating oil delivery is controlled by two independent lubricating oil delivery pipelines, which effectively ensures that the lubricating oil can be delivered to the required gear position.

[0048] Second embodiment: A speed change gearbox with a lubricating oil circuit, see Figure 1-11 On the basis of the first embodiment, the difference from the first embodiment is that a transfer pump 12 is fixedly connected to the inner wall of the second shell 2, and the inlet and outlet of the transfer pump 12 are respectively connected to a liquid suction pipe 13 leading to the bottom end of the third shell 3 and a liquid delivery pipe 14 leading to the top surface of the third gear 6. The transfer pump 12 is used to transfer the lubricating oil between the second shell 2 and the third shell 3 to prevent the lubricating oil from accumulating in the second shell 2 and the third shell 3 and affecting the rotation of the first gear 4.

[0049] In the above embodiments, please refer to Figure 2-7 The rotating shaft of the first gear 4 extends between the first housing 1 and the second housing 2 and is fixedly connected with a bevel gear. The third gear 6 is meshed with the bevel gear. Specifically, the shaft connected to the second gear 5 is the input shaft. The rotation of the input shaft causes the second gear 5 to drive the first gear 4 meshed with it to rotate. The rotating shaft of the first gear 4 drives the bevel gear meshed with the third gear 6, and then drives the third gear 6 to rotate. The rotating shaft connected to the third gear 6 is the output shaft of the gear box.

[0050] Furthermore, a accommodating plate 21 is fixedly connected to the top surface of the third gear 6, and the edge of the accommodating plate 21 is provided with a chamfer inclined downward, and a support rod 22 is fixedly connected to the top of the edge in a ring shape. Specifically, the height of the bottom end of the accommodating plate 21 is flush with the top height of the teeth between the third gear 6, and part of the lubricating oil flowing out from the edge of the accommodating plate 21 can directly lubricate the tooth surface of the third gear 6 obliquely downward along the top of the third gear 6.

[0051] Furthermore, a retaining ring 23 is fixedly connected to the top of the support rod 22. The height of the top of the accommodating plate 21 is higher than the height of the top of the third gear 6. The retaining ring 23 is used to block the lubricating oil leaving the accommodating plate 21 to the tooth surface of the third gear 6. When the lubricating oil in the accommodating plate 21 overflows, a part of it flows along the bevel chamfer to the conical surface of the bevel gear, and another part is thrown out due to centrifugal force. The retaining ring 23 blocks this part of the lubricating oil that is thrown out, and allows this part of the lubricating oil to flow to the tooth surface of the third gear 6, thereby achieving good lubrication of the third gear 6.

[0052] The third embodiment: A speed change gearbox with a lubricating oil circuit, see Figure 1-11 On the basis of the second embodiment, the difference from the second embodiment is that a heating cylinder 7 for wrapping the first infusion tube 8 and the second infusion tube 9 is fixedly connected in the first shell 1, and a heating component for heating the lubricant in the first infusion tube 8 and the second infusion tube 9 is arranged in the heating cylinder 7. Specifically, the heating component in the heating cylinder 7 adopts an electric heating resistance wire in this embodiment. The heating cylinder is used to heat the lubricating oil flowing into the gear box when the speed change gear box is cold started, so as to improve the fluidity of the lubricating oil and help the lubricating oil to better cover the gears that need lubrication.

[0053] Specifically, the mounting plate 301 is also connected with a first wire 10 and a second wire 11, respectively. The first wire 10 is used to supply power to the heating cylinder 7 after passing through the gear box, and the second wire 11 is used to supply power to the transfer pump 12 after passing through the gear box. The first wire 10 and the second wire 11 will not interfere with the normal rotation of the gears in the gear box.

[0054] Furthermore, a temperature probe 201 inserted into the second shell 2 is fixedly connected to the outer wall of the second shell 2, and the temperature probe 201 is used to detect the temperature inside the gear box to determine whether it is necessary to activate external components such as the plate heat exchanger.

[0055] The speed change gearbox of the present invention is used in the following aspects during specific operation: The gearbox that has not been started is filled with lubricating oil. When the gearbox is started, the gear speed inside gradually increases, and the gearbox continuously discharges the lubricating oil in the gearbox from the drain port 102. When the lubricating oil in the gear box is about to be exhausted, the first gear 4 corresponding to the first liquid infusion tube 8 meshes with the corresponding second gear 5, and the lubricating oil is transported from the first liquid infusion tube 8 to the corresponding liquid guide ring 1601, and vice versa; When the first gear 4 rotates, the centrifugal rod 17 is rotated by the centrifugal force to a direction away from the center of the first gear 4 along the radial direction of the first gear. At the same time, the rotating rod 18 at the end of the centrifugal rod 17 is rotated and expanded along its own rotating shaft by the centrifugal force of the counterweight block 20. During the expansion, the torsion spring in its own rotating shaft is compressed until it is kept in the same straight line with the centrifugal rod 17. At this time, the baffle 19 blocks the liquid outlet 1603 at a position away from the tooth surface of the first gear 4. The lubricating oil sprayed from the liquid outlet 1603 hits the baffle 19 and is dispersed. The reaction force of the baffle 19 is evenly distributed to the tooth surface of the first gear 4, thereby achieving lubrication between the first gear 4 and the second gear 5. The transfer pump 12 works to pump the lubricating oil at the bottom between the second housing 2 and the third housing 3 into the receiving plate 21. The lubricating oil that is about to overflow from the receiving plate 21 is thrown out along the edge of the top of the receiving plate 21 under the action of centrifugal force during the rotation of the third gear 6. The thrown out lubricating oil hits the bottom wall of the retaining ring 23 and then disperses to the tooth surface of the third gear 6. The other part of the lubricating oil overflowing from the receiving plate 21 flows downward along the top of the third gear 6 and disperses, which cools down the third gear 6 while ensuring that the lubricating ink between the third gear 6 and the meshing gear is not easily broken. The lubricating oil finally falls into the collecting tank 101 and is discharged from the drain port 102 , passes through the oil filter, plate heat exchanger and other components external to the gear box, and then is input into the gear box through the corresponding first infusion pipe 8 or the second infusion pipe 9 .

[0056] Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contributions as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A speed change gearbox with a lubricating oil circuit, characterized in that: include: A first gear (4) is arranged vertically, the side wall of the first gear (4) being coaxially fixedly connected to a bottom plate (15), the bottom plate (15) being fixedly connected to a cover plate (16) in a direction away from the first gear (4), lubricating oil being able to be accommodated between the cover plate (16) and the bottom plate (15), and a spreading component for spreading the lubricating oil on the tooth surface of the first gear (4) being arranged at the edge; A third housing (3), the third housing (3) being fixedly connected to a pipeline for supplying oil between the cover plate (16) and the bottom plate (15); a third gear (6) arranged horizontally, an oil delivery assembly for pumping lubricating oil to the top surface of the third gear (6) being arranged below the first gear (4), and another spreading assembly for spreading lubricating oil being fixedly connected to the top of the third gear (6); A first shell (1), wherein the bottom end of the first shell (1) is fixedly connected with a drain port (102) for discharging lubricating oil.

2. The speed change gearbox with lubricating oil circuit according to claim 1, characterized in that: The top of the first housing (1) is fixedly connected to the second housing (2), and one side of the second housing (2) is fixedly connected to the third housing (3). Two first gears (4) and two second gears (5) are rotatably connected between the third housing (3) and the second housing (2). The two first gears (4) are coaxially arranged, and the two second gears (5) are coaxially arranged. The spacing between the two first gears (4) is greater than the tooth width of the second gears (5). The second gears (5) are located obliquely above the first gears (4). When the gear box is working, only one pair of the first gears (4) and the second gears (5) are meshed with each other at the same time.

3. The speed change gearbox with lubricating oil circuit according to claim 2, characterized in that: Two of the first gears (4) are provided with base plates (15) facing each other, and the base plates (15) are fixedly connected with cover plates (16) facing each other, and a liquid guide ring (1601) having a diameter larger than the rotating shaft of the first gear (4) is provided at the center of the cover plate (16), and sealing rings (1501) are provided at intervals on the edge of the base plate (15), and gaps (1502) are provided between adjacent sealing rings (1501), and a liquid outlet (1603) is provided at the position of the edge of the cover plate (16) corresponding to the gap (1502).

4. The speed change gearbox with lubricating oil circuit according to claim 3, characterized in that: The outer wall of the cover plate (16) is rotatably connected to a centrifugal rod (17) at an annular interval, the axis of the rotating shaft of the centrifugal rod (17) is parallel to the axis of the rotating shaft of the first gear (4), the end of the centrifugal rod (17) away from its own rotating shaft is rotatably connected to a rotating rod (18), the axis of the rotating shaft of the rotating rod (18) is orthogonal to the axis of the rotating shaft of the corresponding centrifugal rod (17), a torsion spring is arranged at the rotating shaft of the rotating rod (18), and the torsion spring is not compressed when the rotating rod (18) and the centrifugal rod (17) are in contact with each other. When the first gear (4) rotates, the rotating rod (18) can be rotated by its own centrifugal force to a state where it is in the same straight line as the centrifugal rod (17); one end of the rotating rod (18) away from its own rotating shaft is fixedly connected to a baffle (19); the baffle (19) is used to spread the lubricating oil sprayed from the liquid outlet (1603) to the surface of the first gear (4); when the rotating rod (18) and the centrifugal rod (17) are in the same straight line, the diameter of the position where the baffle (19) is located is greater than the diameter of the first gear (4).

5. The speed change gearbox with lubricating oil circuit according to claim 3, characterized in that: The side wall of the third housing (3) is fixedly connected to a mounting plate (301), and the mounting plate (301) is respectively connected to a first infusion tube (8) and a second infusion tube (9), and the first infusion tube (8) and the second infusion tube (9) respectively lead to liquid guide rings (1601) of two cover plates (16).

6. The speed change gearbox with lubricating oil circuit according to claim 5, characterized in that: A heating cylinder (7) for wrapping the first infusion tube (8) and the second infusion tube (9) is fixedly connected to the first shell (1), and a heating component for heating the lubricant in the first infusion tube (8) and the second infusion tube (9) is arranged in the heating cylinder (7).

7. The speed change gearbox with lubricating oil circuit according to claim 2, characterized in that: A transfer pump (12) is fixedly connected to the inner wall of the second shell (2), and the inlet and outlet of the transfer pump (12) are respectively connected to a liquid extraction pipe (13) leading to the bottom end of the third shell (3) and a liquid delivery pipe (14) leading to the top surface of the third gear (6).

8. The speed change gearbox with lubricating oil circuit according to claim 7, characterized in that: The rotating shaft of the first gear (4) extends between the first housing (1) and the second housing (2) and is fixedly connected to a bevel gear. The third gear (6) meshes with the bevel gear. The top surface of the third gear (6) is fixedly connected to a receiving plate (21). The edge of the receiving plate (21) is provided with a chamfer inclined downward, and a support rod (22) is fixedly connected to the top of the edge in a ring shape. The top of the support rod (22) is fixedly connected to a retaining ring (23). The height of the top of the receiving plate (21) is higher than the height of the top of the third gear (6). The retaining ring (23) is used to block lubricating oil leaving the receiving plate (21) from reaching the tooth surface of the third gear (6).

9. The speed change gearbox with lubricating oil circuit according to claim 2, characterized in that: A collecting groove (101) for containing lubricating oil is provided in the first housing (1) at a position lower than the third gear (6), and the bottom end of the collecting groove (101) is connected to a drain port (102) extending out of the first housing (1).

10. The speed change gearbox with lubricating oil circuit according to claim 2, characterized in that: The outer wall of the second shell (2) is fixedly connected with a temperature measuring probe (201) inserted into the second shell (2).

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