Automobile transmission gear box

Abstract

The invention relates to the technical field of transmission gear boxes, in particular to an automobile transmission gear box which comprises a box body, a driving shaft and a transmission gear set, an injection pipeline is arranged in the box body, an oil outlet of the injection pipeline is located in the high-speed gear meshing face of the transmission gear set, and a pressurization oil injection assembly is arranged in the box body. After a driver switches to a high-speed gear, lubricating oil can be injected to the meshing face of the high-speed gear through the pressurizing oil injection assembly, and then it is guaranteed that a stable oil film is formed before meshing of the high-speed gear, the lubricating state of the high-speed gear is improved, and friction between metal is reduced; extra power is not needed, normal work of the gearbox is not affected, meanwhile, lubricating oil at the bottom of the box body can be further stirred, and flowability of the lubricating oil in the box body is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of transmission gearboxes, specifically an automotive transmission gearbox. Background Art

[0002] A gearbox generally refers to a device containing a gear transmission system and has a wide range of uses (such as industrial machinery, watches, etc.), but in the automotive field, it usually specifically refers to a transmission. The transmission is a core component of the vehicle's power system, responsible for adjusting the rotational speed and torque output by the engine and adapting to driving requirements (such as acceleration, climbing, high-speed cruising, etc.) through different gear combinations.

[0003] During vehicle driving, both rapid acceleration and rapid braking will have an impact on the gearbox. Specifically, during rapid acceleration, the rotational speed of the gears changes suddenly, and the lubricating oil cannot form a stable oil film in time, resulting in a boundary lubrication state, which intensifies the friction between metals. In particular, the meshing surface of the high-speed gears is most affected, which will in turn affect the service life of the gearbox.

[0004] For example, in the gearbox of the in-wheel drive system of a new energy vehicle with the publication number CN113803449B, through the provided collar and guide plate, the collar is driven to rotate during the continuous operation of the gearbox, and the lubricating oil is filled into the guide rail during rotation, and it is thrown out from the diversion groove by the centrifugal force during the rotation of the collar and evenly thrown to the side position of the main drive gear, so as to effectively ensure the lubrication of the outer part of the main drive gear by the lubricating oil, thereby effectively improving its service life and ensuring the long-term continuous and stable driving use of the new energy vehicle. It also uses the lubricating oil inside the gearbox to lubricate the driving gear.

[0005] Therefore, we propose an automotive transmission gearbox. Summary of the Invention

[0006] One technical problem to be solved by this application is: how to design an automotive transmission gearbox that pressurizes and injects oil into the meshing surface of high-speed gears.

[0007] To solve the above technical problem, the embodiment of this application provides an automotive transmission gearbox, including a box body, a drive shaft, and a transmission gear set. A spray pipeline is arranged inside the box body, and the oil outlet of the spray pipeline is located at the meshing surface of the high-speed gears of the transmission gear set. A pressurized oil injection assembly is arranged inside the box body.

[0008] In some embodiments, the pressurized oil injection assembly includes a drive gear arranged on the drive shaft, a transmission assembly is arranged inside the box body, a plurality of oil slinger plates are arranged inside the box body, and an oil injection assembly is arranged inside the box body and is matched with the oil slinger plates.

[0009] In some embodiments, the transmission assembly includes a first transmission shaft, a second transmission shaft, and a third transmission shaft rotatably arranged on the box body. A first fixed gear is arranged on the first transmission shaft, a second fixed gear is arranged on the second transmission shaft, and a third fixed gear is arranged on the third transmission shaft.

[0010] In some embodiments, the injection pipeline is composed of an oil injection section, a connection section, and an oil spraying section. The oil injection assembly includes a fixed ring arranged on the third transmission shaft, and the oil throwing plate is arranged on the fixed ring.

[0011] In some embodiments, a fixed groove is formed in the oil spraying section, a lateral spraying plate is arranged on the fixed groove, and a first blocking inclined surface is arranged inside the oil spraying section.

[0012] In some embodiments, an oil liquid temporary storage area is arranged inside the box body. The oil liquid temporary storage area is located at the bottom of the oil injection section, and the oil throwing plate is attached to the oil liquid temporary storage area.

[0013] In some embodiments, the oil liquid temporary storage area is composed of a liquid storage section, a blocking section, and a guiding section.

[0014] In some embodiments, a plurality of oil deflecting plates are arranged on one side of the second fixed gear close to the guiding section.

[0015] In some embodiments, a partition plate is arranged inside the box body, a diversion pipe is arranged on the partition plate, and two ends of the diversion pipe are respectively close to two high-speed gears of the transmission gear set.

[0016] In some embodiments, a plurality of oil outlet holes are formed in the diversion pipe, forward spraying plates with different sizes are arranged on the oil outlet holes, and second blocking inclined surfaces with different sizes are arranged inside the diversion pipe.

[0017] The present invention has at least the following beneficial effects:

[0018] 1. After the driver switches to the high-speed gear, the supercharging oil injection assembly can be used to inject lubricating oil onto the meshing surface of the high-speed gears, thereby ensuring the formation of a stable oil film before the high-speed gears mesh, improving the lubrication state of the high-speed gears, and reducing the friction between metals.

[0019] 2. The driving shaft inside the box body provides a power source, and the injection pipeline provides guiding and limiting. No additional power is required, which will not affect the normal operation of the gearbox. At the same time, it can further stir the lubricating oil at the bottom of the box body and improve the fluidity of the lubricating oil inside the box body.

[0020] 3. By adding a lateral spraying plate and a first blocking inclined surface in the oil spraying section, the lubricating oil can not only fall from above the meshing surface of the high-speed gears to form an oil film, but also be sprayed into the side of the high-speed gears to form an oil film. The dual formation method of the oil film improves the stability of the oil film formation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 is a schematic diagram of the overall sectional structure of the present invention;

[0023] Figure 3 is the Figure 1 sectional structure diagram of the present invention;

[0024] Figure 4 is the Figure 3 planar structure diagram of the present invention;

[0025] Figure 5 is the Figure 3 sectional structure diagram of the present invention;

[0026] Figure 6 is the Figure 3 enlarged structure diagram of area A in the present invention;

[0027] Figure 7 is a schematic diagram of the pressurizing fuel injection assembly and the diversion pipe of the present invention;

[0028] Figure 8 is the Figure 7 planar structure diagram of the present invention;

[0029] Figure 9 is a schematic diagram of the pressurizing fuel injection assembly of the present invention;

[0030] Figure 10 is the Figure 9 exploded schematic diagram of a partial structure of the present invention;

[0031] Figure 11 is a schematic diagram of the sectional structure of the injection pipeline and the oil storage area of the present invention;

[0032] Figure 12 is a schematic diagram of the sectional structure of the diversion pipe of the present invention.

[0033] In the figure: 1. Box body; 2. Driving shaft; 3. Transmission gear set; 4. Injection pipeline; 41. Oil injection section; 42. Connection section; 43. Fuel injection section; 431. Fixed groove; 432. Lateral injection plate; 433. First blocking inclined surface; 5. Pressurizing fuel injection assembly; 51. Driving gear; 52. Oil throwing plate; 6. Transmission assembly; 61. First transmission shaft; 62. Second transmission shaft; 63. Third transmission shaft; 64. First fixed gear; 65. Second fixed gear; 66. Third fixed gear; 7. Oil injection assembly; 71. Fixed ring; 8. Oil storage area; 81. Liquid storage section; 82. Blocking section; 83. Guiding section; 9. Oil deflector; 10. Partition board; 11. Diversion pipe; 12. Oil outlet hole; 13. Forward injection plate; 14. Second blocking inclined surface. Detailed implementation mode

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] Embodiment 1

[0036] Please refer to Figures 1 - 11 , the present invention provides a technical solution:

[0037] An automotive transmission gearbox, including a box body 1, a drive shaft 2 and a transmission gear set 3. A spray pipeline 4 is arranged in the box body 1. The oil outlet of the spray pipeline 4 is located at the meshing surface of the high-speed gears of the transmission gear set 3. A supercharging oil injection assembly 5 is arranged in the box body 1;

[0038] The box body 1, the drive shaft 2 and the transmission gear set 3 are all common existing structures. In this solution, the transmission gear set 3 includes an input shaft (i.e., the drive shaft 2), an output shaft, a synchronizer, a reverse idler gear and other structures. At the same time, for the content design of the solution, the transmission gear set 3 is equipped with a high-speed gear set, that is, there is a large gear on the drive shaft 2 and a small gear meshing with the large gear on the output shaft. When the drive shaft 2 rotates, the large gear drives the small gear to rotate, thereby realizing the rotation of the output shaft. At this time, the engine speed decreases and the fuel economy is improved, which is suitable for high-speed cruising;

[0039] The oil outlet of the spray pipeline 4 is of a bent structure and is located above the meshing surface of the high-speed gears of the transmission gear set 3. After the supercharging oil injection assembly 5 adds lubricating oil into the spray pipeline 4, it will pass through the spray pipeline 4 and finally be sprayed out from the oil outlet of the spray pipeline 4, directly spraying on the area above the meshing surface of the high-speed gears to form a stable oil film before the high-speed gears mesh.

[0040] The supercharging oil injection assembly 5 includes a drive gear 51 arranged on the drive shaft 2, a transmission assembly 6 arranged in the box body 1, a plurality of oil slinger plates 52 arranged in the box body 1, and an oil injection assembly 7 arranged in the box body 1 and cooperating with the oil slinger plates 52;

[0041] The pitch circle diameter of the driving gear 51 is smaller than the pitch circle diameter of the high-speed gear, which can reduce the impact on the high-speed gear, ensure the original lubrication effect of the high-speed gear, and avoid the surrounding lubricating oil being thrown away when the driving gear 51 rotates; there are multiple oil-slinging plates 52, and the oil injection assembly 7 can drive multiple oil-slinging plates 52 to rotate synchronously, and then throw the lubricating oil upward, so that the lubricating oil can enter the injection pipe 4. In order to improve the throwing effect of the lubricating oil, a protrusion structure can be added to the oil-slinging plate 52 to induce lateral vortexes through surface textures to destroy the stability of the boundary layer. At the same time, it can also enhance the shear force and optimize the fluid path. Specifically, a protrusion structure with a height of 0.5-1.2mm is added to the oil-slinging plate 52. In this solution, the protrusion structure preferably adopts a herringbone protrusion (V-shaped), but it is not limited to it. A spiral structure, a wavy structure, etc. can also be used;

[0042] The transmission assembly 6 includes a transmission shaft 1 61, a transmission shaft 2 62 and a transmission shaft 3 63 rotatably arranged on the housing 1, the transmission shaft 1 61 is provided with a fixed gear 1 64, the transmission shaft 2 62 is provided with a fixed gear 2 65, and the transmission shaft 3 63 is provided with a fixed gear 3 66;

[0043] The transmission shaft 1 61, the transmission shaft 2 62 and the transmission shaft 3 63 are all arranged on the inner wall of the housing 1. If the high-speed gear is not located on the side wall of the housing 1, the transmission shaft 1 61, the transmission shaft 2 62 and the transmission shaft 3 63 can be installed by means of a bracket, which is a basic common sense known to those skilled in the art and will not be described in detail.

[0044] The modules of the driving gear 51, the fixed gear 1 64, the fixed gear 2 65 and the fixed gear 3 66 are the same, and the pitch circle diameter gradually increases, thereby gradually reducing the rotation speed of each gear to avoid the surrounding lubricating oil being thrown out due to too high speed, ensuring that the oil-slinging plate 52 has enough lubricating oil to use.

[0045] The injection pipeline 4 is composed of an oil injection section 41, a connecting section 42 and an oil injection section 43. The oil injection assembly 7 includes a fixing ring 71 arranged on the transmission shaft 3 63, and the oil slinger 52 is arranged on the fixing ring 71;

[0046] The oil injection section 41 is composed of an arc-shaped plate and side plates on both sides, forming an oil injection channel that can fit the oil slinging plate 52. The area between the oil injection channel and the oil slinging plate 52 is the lubricating oil slinging into the connecting section 42 each time. The connecting section 42 is a rectangular channel smoothly connected to the oil injection section 41, and the oil injection section 43 is a curved channel smoothly connected to the connecting section 42.

[0047] The connecting section 42 is provided with a rotation slot for the oil-slinging plate 52 to rotate, and the size of the rotation slot is such that the oil-slinging plate 52 can just pass through. In this solution, the number of the oil-slinging plates 52 is designed to be 5.Figure 11 As shown, when an oil slinger 52 is in the oil-slinging state, the previous oil slinger 52 just leaves from the position of the rotation notch, so as to prevent the lubricating oil thrown out from being blocked by the previous oil slinger 52.

[0048] During use, the drive shaft 2 rotates to drive the drive gear 51 on it to rotate synchronously. The drive gear 51 drives the first fixed gear 64 and the first transmission shaft 61 to rotate. The first fixed gear 64 drives the second fixed gear 65 and the second transmission shaft 62 to rotate. The rotation of the second fixed gear 65 will drive the third fixed gear 66 and the third transmission shaft 63 to rotate. The third transmission shaft 63 drives the fixed ring 71 and the oil slinger 52 on it to rotate. The rotation of the oil slinger 52 can fit the oil injection section 41 to throw the lubricating oil at the bottom upward. When an oil slinger 52 is in the oil-slinging state, the previous oil slinger 52 just leaves from the position of the rotation notch, and after passing through the connection section 42, it is directly sprayed from the injection section 43 onto the area above the meshing surface of the high-speed gear, forming a stable oil film before the high-speed gear meshes, so as to form an oil film.

[0049] Embodiment 2

[0050] Please refer to Figures 8 - 10 , the present invention provides a technical solution:

[0051] For an automotive transmission gearbox, a fixing groove 431 is formed on the injection section 43, and a lateral injection plate 432 is arranged on the fixing groove 431. A first blocking inclined surface 433 is arranged inside the injection section 43. The lateral injection plate 432 and the first blocking inclined surface 433 are provided to enable the lubricating oil to not only fall from above the meshing surface of the high-speed gear to form an oil film, but also be sprayed into the side of the high-speed gear to form an oil film, realizing a dual oil film formation method;

[0052] Compared with the method of directly falling from above the meshing surface of the high-speed gear to form an oil film, side injection is beneficial to reducing the situation of being thrown out by the high-speed gear, and directly injecting from the side onto the meshing surface of the high-speed gear can inject oil more directly and form an oil film quickly. At the same time, when the amount of lubricating oil thrown out by the oil slinger 52 is small or the throwing pressure is insufficient, it can ensure that the meshing surface of the high-speed gear still has lubricating oil injection, which is beneficial to ensuring the lubrication effect.

[0053] Embodiment 3

[0054] Please refer to Figures 7 - 9 , the present invention provides a technical solution:

[0055] Automobile transmission gearbox, an oil storage area 8 is arranged in the box body 1. The oil storage area 8 is located at the bottom of the oil injection section 41. The oil throwing plate 52 is attached to the oil storage area 8. The oil storage area 8 is a structure with an upward opening and is located between the high-speed gear and the fixed gear three 66. The height on the side close to the high-speed gear is lower than that on the side close to the fixed gear three 66. The reason for such a design is to achieve oil supply on demand in different areas through the height difference and flow-limiting design, that is, to ensure the normal oil supply of the high-speed gear while reducing the oil supply on the side of the fixed gear three 66.

[0056] The setting of the oil storage area 8 enables it to ensure that when the oil throwing plate 52 rotates to the oil injection section 41, there is as much oil as possible at the bottom for use. At the same time, it also prevents the oil from being directly thrown out when the oil throwing plate 52 rotates, ensuring that there is oil for the subsequent oil throwing plate 52.

[0057] The bottom of the oil storage area 8 is lower than the oil throwing plate 52, and its size is larger than that of the oil injection section 41, so that the oil thrown out by the oil throwing plate 52 and not entering the connection section 42 can enter the rear of the oil injection section 41 for buffering, preventing the oil from being directly thrown out of the oil storage area 8.

[0058] Embodiment 4

[0059] Please refer to Figures 10 - 11 , the present invention provides a technical solution:

[0060] Automobile transmission gearbox, the oil storage area 8 is composed of a liquid storage section 81, a blocking section 82 and a guiding section 83. The liquid storage section 81 is close to the fixed ring 71 and the oil throwing plate 52 and is used to ensure the normal oil use of the oil throwing plate 52. The guiding section 83 is far from the fixed ring 71 and is close to the position of the fixed gear one 64. The blocking section 82 is located between the liquid storage section 81 and the guiding section 83. Oil can enter from the guiding section 83 and enter the liquid storage section 81 through the blocking section 82.

[0061] The setting of the blocking section 82 confines the oil in a specific area (the liquid storage section 81), reduces the splashing to other positions, and can also increase the resistance of the oil flow path, offset the oil throwing effect of the high-speed centrifugal force, and maintain lubrication stability. The blocking section 82 can be designed as a stepped shape or a serrated shape, but there is no limitation. In this solution, it is designed as a stepped shape. A magnetic structure can also be designed on the surface of the blocking section 82 close to the oil to adsorb metal impurities in the oil and ensure the cleanliness of the oil.

[0062] Embodiment 5

[0063] Please refer to Figures 7 - 8 , the present invention provides a technical solution:

[0064] Automobile transmission gearbox. A plurality of oil deflector plates 9 are arranged on one side of the fixed gear two 65 close to the guiding section 83. The arrangement of the oil deflector plates 9 enables the oil to enter the guiding section 83 from the inside of the box body 1 with a certain pressure, and then rush through the blocking section 82 and be stored in the liquid storage section 81, ensuring the normal use of the oil in the liquid storage section 81.

[0065] Embodiment 6

[0066] Please refer to Figures 3 - 8 , the present invention provides a technical solution:

[0067] In an automobile transmission gearbox, a partition plate 10 is arranged inside the box body 1, and a diversion pipe 11 is arranged on the partition plate 10. The two ends of the diversion pipe 11 are respectively close to the two high-speed gears of the transmission gear set 3. The partition plate 10 is located on the side of the high-speed gear on the output shaft, and the high-speed gear on this side is smaller (the other gears on the output shaft are larger), so the distance from the box body 1 is relatively far. Therefore, the partition plate 10 is designed to ensure the lubricating oil use of the high-speed gear;

[0068] The diversion pipe 11 is designed with a variable diameter structure. The dimension of the diversion pipe 11 on the side close to the high-speed gear on the output shaft is larger than the other side, and the pipe diameter width of the diversion pipe 11 on the side close to the high-speed gear on the output shaft is larger than the tooth width of the high-speed gear on the output shaft;

[0069] The diversion pipe 11 is located on the side of the high-speed gear on the output shaft and can guide the lubricating oil splashed up when the high-speed gear rotates. Specifically, through the arrangement of the diversion pipe 11, the lubricating oil splashed up by the high-speed gear on the output shaft is sent to the position of the high-speed gear on the driving shaft 2. In this way, it can also quickly inject oil to the meshing surface of the high-speed gear to form an oil film. Why send the lubricating oil splashed by the high-speed gear on the output shaft to the high-speed gear on the driving shaft 2? This is to form a reverse oil injection path. At the same time, the rotational speed of the high-speed gear on the driving shaft 2 is lower than that of the high-speed gear on the output shaft, avoiding being directly thrown out by the high-speed gear;

[0070] At the same time, the arrangement of the partition plate 10 and the diversion pipe 11 can also break the oil liquid ring formed when the high-speed gear rotates (when the high-speed gear rotates, the oil liquid is thrown outwards).

[0071] Embodiment 7

[0072] Please refer to Figure 12 , the present invention provides a technical solution:

[0073] Automobile transmission gearbox, a plurality of oil outlet holes 12 are formed in the diversion pipe 11, and positive injection plates 13 with different sizes are arranged on the oil outlet holes 12. A second blocking inclined surface 14 with different sizes is arranged inside the diversion pipe 11. The size of the positive injection plate 13 close to the high-speed gear on the drive shaft 2 is smaller than that of the positive injection plate far from the high-speed gear on the drive shaft 2, which can ensure the normal rotation of the high-speed gear. At the same time, the size of the second blocking inclined surface 14 close to the high-speed gear on the drive shaft 2 is larger than that of the second blocking inclined surface 14 far from the high-speed gear on the drive shaft 2, which can gradually spray the oil in the diversion pipe 11 from different positive injection plates 13 to form multi-stage injection channels with different pressures.

[0074] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0075] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention.

Claims

1. An automotive transmission gearbox, comprising a housing (1), a drive shaft (2) and a transmission gear set (3), characterized in that: A spray pipe (4) is arranged inside the box body (1), and the oil outlet of the spray pipe (4) is located at the meshing surface of the high-speed gears of the transmission gear set (3). A supercharging oil injection assembly (5) is arranged inside the box body (1).

2. The automotive transmission gearbox according to claim 1, characterized in that: The supercharging oil injection assembly (5) includes a driving gear (51) arranged on the driving shaft (2), a transmission assembly (6) is arranged inside the box body (1), a plurality of oil throwing plates (52) are arranged inside the box body (1), and an oil injection assembly (7) matched with the oil throwing plates (52) is arranged inside the box body (1).

3. The automotive transmission gearbox according to claim 2, characterized in that: The transmission assembly (6) includes a first transmission shaft (61), a second transmission shaft (62) and a third transmission shaft (63) rotatably arranged on the box body (1). A first fixed gear (64) is arranged on the first transmission shaft (61), a second fixed gear (65) is arranged on the second transmission shaft (62), and a third fixed gear (66) is arranged on the third transmission shaft (63).

4. The automotive transmission gearbox according to claim 3, characterized in that: The spray pipe (4) is composed of an oil injection section (41), a connecting section (42) and an oil spraying section (43). The oil injection assembly (7) includes a fixed ring (71) arranged on the third transmission shaft (63), and the oil throwing plates (52) are arranged on the fixed ring (71).

5. The automotive transmission gearbox according to claim 4, characterized in that: A fixed groove (431) is formed in the oil spraying section (43), a lateral spraying plate (432) is arranged on the fixed groove (431), and a first blocking inclined surface (433) is arranged inside the oil spraying section (43).

6. The automotive transmission gearbox according to claim 5, characterized in that: An oil liquid temporary storage area (8) is arranged inside the box body (1), the oil liquid temporary storage area (8) is located at the bottom of the oil injection section (41), and the oil throwing plates (52) are attached to the oil liquid temporary storage area (8).

7. The automotive transmission gearbox according to claim 6, characterized in that: The oil liquid temporary storage area (8) is composed of a liquid storage section (81), a blocking section (82) and a guiding section (83).

8. The automotive transmission gearbox according to claim 7, characterized in that: A plurality of oil deflecting plates (9) are arranged on one side of the second fixed gear (65) close to the guiding section (83).

9. The automotive transmission gearbox according to any one of claims 1-8, characterized in that: A partition plate (10) is arranged inside the box body (1), a diversion pipe (11) is arranged on the partition plate (10), and two ends of the diversion pipe (11) are respectively close to two high-speed gears of the transmission gear set (3).

10. The automotive transmission gearbox according to claim 9, characterized in that: A plurality of oil outlet holes (12) are formed in the diversion pipe (11), forward spraying plates (13) with different sizes are arranged on the oil outlet holes (12), and second blocking inclined surfaces (14) with different sizes are arranged inside the diversion pipe (11).

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