Reduction gearbox lubricating structure and reduction gearbox

Abstract

The invention relates to a reduction gearbox lubricating structure and a reduction gearbox, the reduction gearbox lubricating structure comprises a reduction gearbox shell, a first shaft bearing mounting hole for mounting a first shaft bearing and a second shaft bearing mounting hole for mounting a second shaft bearing are formed in the reduction gearbox shell, and the reduction gearbox shell further comprises a first flow guide wall and a second flow guide wall; the first flow guide wall is arranged on the inner side of the reduction gearbox shell and located above the first-shaft bearing mounting hole and the second-shaft bearing mounting hole, and the second flow guide wall is arranged on the inner side of the reduction gearbox shell and located below the first-shaft bearing mounting hole and the second-shaft bearing mounting hole. In the direction from the second-shaft bearing mounting hole to the first-shaft bearing mounting hole, the first flow guide wall and the second flow guide wall are close to each other and are connected, and the second flow guide wall is provided with a first oil accumulation groove corresponding to the second-shaft bearing mounting hole. The reduction gearbox lubricating structure can reinforce continuous lubrication of the bearing on the right side of the reduction gearbox, and the utilization rate of lubricating oil and the continuous lubrication effect of the whole reduction gearbox system are improved.

Description

Technical Field

[0001] This invention relates to the field of gearbox technology, and in particular to a gearbox lubrication structure and a gearbox. Background Technology

[0002] To ensure efficient transmission, low noise, low vibration, and high load capacity, cylindrical helical gears require repeated circulation of lubricating oil for lubrication, heat transfer, corrosion prevention, and cleaning. Furthermore, two-stage gearbox structures are often used in high-speed and high-torque applications, making an effective lubricating oil circulation system essential.

[0003] Common lubrication methods for gearbox lubrication systems include splash lubrication and immersion lubrication. Splash lubrication is simple in structure and low in cost, but it has a high oil mist dispersion rate and low effective utilization rate. Immersion lubrication is often used in conjunction with splash lubrication and is suitable for gearboxes with small, enclosed cavities, but it is not suitable for gearboxes with open structures.

[0004] The common lubrication method for two-stage gearboxes is splash lubrication. Please refer to [link / reference]. Figures 1 to 3 The two-stage reduction gearbox consists of three shafts and two stages of transmission between them. The first-stage shaft is the input shaft, on which a first-stage driving gear is mounted. The second-stage shaft is the intermediate shaft, on which a first-stage driven gear and a second-stage driving gear are mounted. The first-stage driven gear meshes with the first-stage driving gear. The third-stage shaft is the output shaft, on which a second-stage driven gear and a differential are mounted. The lubrication method of this intermediate reduction gearbox is usually that gear oil adheres to the tooth surface of the second-stage driven gear. During rotation, the gear oil is agitated and dispersed to the surroundings under the action of centrifugal force.

[0005] like Figure 1 and Figure 2 As shown, the secondary driven gear 500 is a left-handed gear. Under the agitation of the left-handed secondary driven gear 500, most of the oil splashes onto the left side of the gearbox, flushing the first-stage left bearing 1 and the second-stage left bearing 1, ensuring the lubrication of the left gear and bearing. The right gear and bearing rely on the intermittent lubrication of the gear oil agitated by the first-stage driven gear 400 or the gear oil that has escaped from the secondary driven gear 500 and adhered to the outer wall of the gearbox. The lubrication effect is generally poor. Summary of the Invention

[0006] The first objective of this invention is to provide a gearbox lubrication structure to enhance continuous lubrication of the right-side bearing of the gearbox, improve the utilization rate of lubricating oil, and enhance the continuous lubrication effect of the entire gearbox system.

[0007] A second objective of the present invention is to provide a gearbox including the above-described gearbox lubrication structure.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] In a first aspect of this application, a gearbox lubrication structure is provided, including a gearbox housing. The gearbox housing has a primary shaft bearing mounting hole for mounting a primary shaft bearing and a secondary shaft bearing mounting hole for mounting a secondary shaft bearing. The gearbox housing further includes:

[0010] The first guide wall is disposed on the inner side of the gearbox housing, and the first guide wall is above the mounting hole of the first shaft bearing and the mounting hole of the second shaft bearing;

[0011] The second guide wall is disposed on the inner side of the gearbox housing. The second guide wall is below the mounting holes of the first shaft bearing and the second shaft bearing, and extends along the direction from the mounting hole of the second shaft bearing to the mounting hole of the first shaft bearing. The first guide wall and the second guide wall are close to each other and connected. The second guide wall is provided with a first oil accumulation groove corresponding to the mounting hole of the second shaft bearing.

[0012] In one possible implementation, the ends of the first guide wall and the second guide wall that are close to each other are connected by a transition guide wall. The transition guide wall is provided with an oil collection groove. The first slot of the oil collection groove is used to collect part of the oil flowing along the first guide wall and the transition guide wall. The second slot of the oil collection groove is connected to the shaft bearing mounting hole.

[0013] In one possible implementation, the gearbox housing further includes a second oil collection groove and a third oil collection groove, both of which are disposed on the outer side of the gearbox housing. The second oil collection groove corresponds to the mounting hole of the first shaft bearing, and the third oil collection groove corresponds to the mounting hole of the second shaft bearing. The second oil collection groove and the third oil collection groove are in communication. The second opening of the oil collection groove is in communication with the second oil collection groove through a first oil guide groove disposed on the hole wall of the mounting hole of the first shaft bearing. The third oil collection groove is in communication with the first oil collection groove through the internal clearance of the second shaft bearing.

[0014] In one possible implementation, the gearbox housing further includes:

[0015] The third guide wall is disposed on the outer side of the first guide wall away from the gearbox housing, and is located above the first guide wall;

[0016] The first arc-shaped wall is disposed on the outer side of the second guide wall away from the gearbox housing and is located below the second guide wall. The first arc-shaped wall and the third guide wall are smoothly connected by the second arc-shaped wall. The first arc-shaped wall is concentrically disposed with the shaft bearing mounting hole. The first arc-shaped wall constitutes the fourth oil accumulation groove.

[0017] In one possible implementation, a first arc-shaped baffle that curves upward toward the first guide wall is provided on the second guide wall. The first arc-shaped baffle extends to the first arc-shaped wall in a direction away from the outer side of the gearbox housing. The surface of the first arc-shaped baffle is smoothly connected to the first arc-shaped wall to form the fourth oil accumulation groove.

[0018] The second guide wall is provided with a second arc-shaped baffle that curves upward toward the first guide wall, and the second arc-shaped baffle, the second guide wall and the first arc-shaped baffle together form the first oil accumulation groove.

[0019] As can be seen from the above technical solutions, the present invention discloses a gearbox lubrication structure, which includes a gearbox housing. The gearbox housing is provided with a first shaft bearing mounting hole for mounting a first shaft bearing and a second shaft bearing mounting hole for mounting a second shaft bearing. The gearbox housing also includes a first guide wall and a second guide wall. The first guide wall is disposed on the inner side of the gearbox housing and above the first shaft bearing mounting hole and the second shaft bearing mounting hole.

[0020] The second guide wall is located inside the gearbox housing. The second guide wall is located below the first shaft bearing mounting hole and the second shaft bearing mounting hole. Along the direction from the second shaft bearing mounting hole to the first shaft bearing mounting hole, the first guide wall and the second guide wall are close to each other and connected. The second guide wall is provided with a first oil accumulation groove corresponding to the second shaft bearing mounting hole.

[0021] In application, the secondary driven gear agitates the lubricating oil, causing it to splash onto the first guide wall. Utilizing the gravity and adhesion of the oil, it is guided along the first guide wall in the desired direction, eventually converging into the first oil collection groove. The primary driven gear is partially located in the first oil collection groove. Under the agitation of the right-hand driven gear, it continuously supplies oil to the first and second shaft bearings on the right side, enhancing the continuous lubrication of the right-side bearings of the gearbox, improving the utilization rate of the lubricating oil, and enhancing the continuous lubrication effect of the entire gearbox system.

[0022] In a second aspect of this application, a gearbox is provided, including a gearbox lubrication structure as described in the first aspect and its possible implementations.

[0023] In one possible implementation, a P-gear parking device is also included, the P-gear parking device comprising:

[0024] A ratchet is mounted on the gear shaft inside the reduction gearbox;

[0025] A pawl is rotatably mounted inside the gearbox;

[0026] An actuator, connected to the pawl drive, is used to drive the pawl to move closer to and away from the ratchet, so that the pawl engages with the ratchet to lock the gear shaft, or disengages the pawl from the ratchet to unlock the gear shaft.

[0027] In one possible implementation, the actuator includes:

[0028] The motor is located outside the gearbox, and the motor shaft passes through the gearbox housing and extends into the gearbox.

[0029] A cam-linkage mechanism is used, in which the motor shaft is connected to the pawl via the cam-linkage mechanism to drive the pawl to reciprocate relative to the ratchet.

[0030] In one possible implementation, the cam linkage mechanism includes a cam disposed on the motor shaft, the cam engaging with the pawl.

[0031] In one possible implementation, an elastic reset member is provided between the pawl and the gearbox housing, the elastic reset member being used to apply a preload force to the pawl to move the pawl closer to or away from the ratchet.

[0032] Since the gearbox adopts the gearbox lubrication structure in the first aspect and its possible implementations mentioned above, the gearbox should have the same beneficial effects as the gearbox lubrication structure, which will not be elaborated here. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 A schematic diagram of the internal partial structure of a two-stage gearbox in the prior art. Figure 1 ;

[0035] Figure 2 A schematic diagram of the internal partial structure of a two-stage gearbox in the prior art. Figure 2 ;

[0036] Figure 3 A schematic diagram of the inner structure of the gearbox housing for the gearbox lubrication structure provided in an embodiment of the present invention;

[0037] Figure 4 A partial sectional view of the inner side of the gearbox housing for a gearbox lubrication structure provided in an embodiment of the present invention;

[0038] Figure 5 A schematic diagram of the outer structure of the gearbox housing for the gearbox lubrication structure provided in an embodiment of the present invention;

[0039] Figure 6 This is a schematic diagram of the internal structure of the gearbox provided in an embodiment of the present invention;

[0040] Figure 7 A cross-sectional view of a gearbox provided in an embodiment of the present invention;

[0041] Figure 8 This is a schematic diagram of the P-gear parking device of the gearbox provided in an embodiment of the present invention.

[0042] In the picture:

[0043] 100 is the right side housing; 100a is the first shaft bearing mounting hole; 100b is the second shaft bearing mounting hole; 101 is the first guide wall; 102 is the second guide wall; 1021 is the first arc-shaped baffle; 1022 is the second arc-shaped baffle; 103 is the transition guide wall; 104 is the oil collection groove; 1041 is the first slot opening; 1042 is the second slot opening; 105 is the first oil accumulation groove; 106 is the third guide wall; 107 is the first arc-shaped wall; 108 is the second arc-shaped wall; 109 is the second oil accumulation groove. ; 110 is the third oil trough; 111 is the second oil guide trough; 112 is the first oil guide trough; 200 is the first-stage gear shaft; 210 is the first-stage left bearing; 220 is the first-stage right bearing; 300 is the second-stage gear shaft; 310 is the second-stage left bearing; 320 is the second-stage right bearing; 400 is the first-stage driven gear; 500 is the second-stage driven gear; 600 is the differential; 700 is the P-gear parking device; 710 is the ratchet; 720 is the pawl; 730 is the actuator; 731 is the motor; 732 is the cam. Detailed Implementation

[0044] One of the core aspects of this invention is to provide a gearbox lubrication structure. The structural design of this gearbox lubrication structure enhances the continuous lubrication of the right-side bearing of the gearbox, improves the utilization rate of lubricating oil, and enhances the continuous lubrication effect of the entire gearbox system.

[0045] Another core aspect of this invention is to provide a gearbox that includes the aforementioned gearbox lubrication structure.

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] The two-stage helical gear reducer is a structure that uses two stages of helical cylindrical gear transmission to reduce speed and increase torque. Power is input from the driving gear and output through the driven gear. It features high-efficiency transmission, low noise, low vibration, and high load capacity.

[0048] like Figure 1 and Figure 2 As shown, the internal structure of the two-stage cylindrical helical gear reducer includes a primary gear shaft 200, a secondary gear shaft 300, a primary driven gear 400, a secondary driven gear 500, and a differential 600. The primary gear shaft 200 is rotatably mounted on the reducer housing via primary left bearings 210 and primary right bearings 220 at both ends. The secondary gear shaft 300 is rotatably mounted on the reducer housing via secondary left bearings 310 and secondary right bearings 320 at both ends. The primary driven gear 400 is mounted on the secondary gear shaft 300 and meshes with the primary gear shaft 200. The secondary driven gear 500 is connected to the housing of the differential 600 and meshes with the secondary gear shaft 300. The output half-shaft connected to the differential 600 passes through the central hole of the secondary driven gear 500.

[0049] Power is input from the first-stage gear shaft 200. First, it is engaged by the first-stage gear pair (first-stage gear shaft 200 and first-stage driven gear 400) to achieve initial deceleration and torque increase. Then, the power is transmitted to the second-stage gear pair (second-stage gear shaft 300 and second-stage driven gear 500) to further decelerate and amplify the torque. Finally, the power is transmitted to the wheels via the planetary half-shaft gear structure of the differential 600 to the torsional half-shaft.

[0050] The lubrication method for the two-stage cylindrical helical gear reducer is splash lubrication, such as... Figure 2 As shown, gear oil adheres to the bottom of the gearbox from the secondary driven gear 500. During rotation, the gear oil is agitated and dispersed to the surroundings under centrifugal force. However, since the secondary driven gear 500 is a left-handed gear, most of the gear oil adhering to it splashes to the left side of the gearbox, namely the location of the primary left bearing 210 and the secondary left bearing 310, ensuring the lubrication of the left gear and bearing. The lubrication of the primary right bearing 220, the secondary right bearing 320, and the primary gear pair depends on the intermittent lubrication caused by the agitation of a small amount of gear oil by the primary driven gear 400 (the primary driven gear 400 has a small diameter and can agitate less gear oil) or the gear oil that disperses from the secondary driven gear 500 to the gearbox wall. The lubrication effect is generally poor.

[0051] To address the aforementioned shortcomings and improve the lubrication of the right-side bearing and gears of a two-stage cylindrical helical gear reducer without altering its internal transmission structure, this application provides a gearbox lubrication structure. Please refer to [link to relevant documentation]. Figure 3 , Figure 4 and Figure 7The gearbox lubrication structure includes a gearbox housing, which includes a left housing 800 and a right housing 100. The left housing 800 and the right housing 100 cooperate to form the gearbox housing to accommodate the aforementioned primary gear shaft 200, secondary gear shaft 300, primary driven gear 400, secondary driven gear 500, and differential 600. The gearbox housing is provided with a primary bearing mounting hole 100a for mounting the primary right bearing 220 and a secondary bearing mounting hole 100b for mounting the secondary right bearing 320. The gearbox housing also includes a first guide wall 101 and a second guide wall 102. Here, the gearbox housing refers to the right housing 100. Of course, the same or similar structures can be provided on the left housing 800.

[0052] The first guide wall 101 is located on the inner side of the gearbox housing, that is, on the side of the right housing 100 facing the left housing 800. The first guide wall 101 is located above the first shaft bearing mounting hole 100a and the second shaft bearing mounting hole 100b.

[0053] The second guide wall 102 is located inside the gearbox housing, on the side of the right housing 100 facing the left housing 800. The second guide wall 102 is below the first shaft bearing mounting hole 100a and the second shaft bearing mounting hole 100b. The first guide wall 101 and the second guide wall 102 are arranged vertically opposite each other. Along the direction from the second shaft bearing mounting hole 100b to the first shaft bearing mounting hole 100a, the first guide wall 101 and the second guide wall 102 approach each other and connect. That is, as the distance from the secondary driven gear 500 increases, the distance between the first guide wall 101 and the second guide wall 102 decreases. The second guide wall 102 is provided with a first oil accumulation groove 105 corresponding to the second shaft bearing mounting hole 100b. The first oil accumulation groove 105 is used to accumulate gear oil.

[0054] That is, the first guide wall 101 and the second guide wall 102 are inclined relative to the center line connecting the first shaft bearing mounting hole 100a and the second shaft bearing mounting hole 100b. The center distance between the first guide wall 101 and the first shaft bearing mounting hole 100a is smaller than the center distance between the first guide wall 101 and the second shaft bearing mounting hole 100b; the center distance between the second guide wall 102 and the first shaft bearing mounting hole 100a is smaller than the center distance between the second guide wall 102 and the second shaft bearing mounting hole 100b.

[0055] Compared with the prior art, the gearbox lubrication structure provided in this application embodiment, when applied, has the secondary driven gear 500 agitating the lubricating oil, causing it to splash onto the first guide wall 101. Utilizing the gravity guidance and adhesion of the oil, it is guided along the first guide wall 101 in the desired direction, that is, it gradually slides down the first guide wall 101 and flows to the second guide wall 102, eventually converging into the first oil accumulation groove 105. The primary driven gear 400 is partially located in the first oil accumulation groove 105. Under the agitation of the right-hand driven gear 400, it continuously supplies oil to the primary right bearing 220, the secondary right bearing 320, and the primary gear pair on the right side, enhancing the continuous lubrication of the right-side bearings and gears of the gearbox, improving the utilization rate of the lubricating oil and the continuous lubrication effect of the entire gearbox system.

[0056] To further optimize the above technical solution, please refer to one embodiment of this application. Figure 3 and Figure 4 The first guide wall 101 and the second guide wall 102 are connected at their close ends by a transition guide wall 103. The transition guide wall 103 is an arc-shaped wall and is provided with an oil collection groove 104. The first groove 1041 of the oil collection groove 104 is used to collect part of the oil flowing along the first guide wall 101 and the transition guide wall 103. The second groove 1042 of the oil collection groove 104 is connected to the bearing mounting hole 100a. Part of the lubricating oil flowing along the first guide wall 101 drips onto the second guide wall 102 during the flow process and accumulates in the first oil collection groove 105. Part of it flows along the transition guide wall 103 to the oil collection groove 104 and flows from the second groove 1042 of the oil collection groove 104 to the outside of the right housing 100, that is, the side of the right housing 100 away from the left housing 800.

[0057] To ensure continuous lubrication of all components by circulating the lubricating oil, in one embodiment of this application, such as... Figure 5 As shown, the gearbox housing also includes a second oil collection groove 109 and a third oil collection groove 110. The second oil collection groove 109 and the third oil collection groove 110 are both located on the outer side of the right side housing 100, that is, on the side of the right side housing 100 away from the left side housing 800. The second oil collection groove 109 is provided corresponding to the first shaft bearing mounting hole 100a, and the third oil collection groove 110 is provided corresponding to the second shaft bearing mounting hole 100b. The second oil collection groove 109 and the third oil collection groove 110 are connected through the second oil guide groove 111. The second groove opening 1042 of the oil collection groove 104 is connected to the second oil collection groove 109 through the first oil guide groove 112 provided in the hole wall of the first shaft bearing mounting hole 100a. The third oil collection groove 110 is connected to the first oil collection groove 105 through the internal clearance of the second-stage right bearing 320, forming a lubricating oil circulation on the inner and outer sides of the gearbox housing.

[0058] The lubricating oil inside the gearbox flows from the inside of the right housing 100 along the first guide wall 101, enters the oil collection tank 104 from the first slot 1041, and then enters the second oil collection tank 109 on the outside of the right housing 100 from the second slot 1042 of the oil collection tank 104 via the first guide groove 112 to lubricate the first-stage right bearing 220. The excess lubricating oil gradually rises in the second oil collection tank 109 and enters the third oil collection tank 110 through the second guide groove 111. Finally, it flows back to the inside of the right housing 100 through the internal gap of the second-stage right bearing 320 and falls into the first oil collection tank 105, thus realizing the circulation of the lubricating oil.

[0059] To further optimize the above technical solution, the gearbox housing also includes a third guide wall 106 and a first arc-shaped wall 107. The third guide wall 106 is located on the outer side of the first guide wall 101 away from the gearbox housing and is above the first guide wall 101. The first arc-shaped wall 107 is located on the outer side of the second guide wall 102 away from the gearbox housing and is below the second guide wall 102. The first arc-shaped wall 107 and the third guide wall 106 are smoothly connected by a second arc-shaped wall 108. The first arc-shaped wall 107 is concentrically arranged with the shaft bearing mounting hole 100a and forms a fourth oil accumulation groove.

[0060] The second guide wall 102 is provided with a first arc-shaped baffle 1021 that curves upward toward the first guide wall 101. The first arc-shaped baffle 1021 extends to the first arc-shaped wall 107 in a direction away from the outer side of the gearbox housing. The surface of the first arc-shaped baffle 1021 is smoothly connected to the first arc-shaped wall 107 to form a fourth oil accumulation groove.

[0061] The second guide wall 102 is provided with a second arc-shaped baffle 1022 that curves upward toward the first guide wall 101. The second arc-shaped baffle 1022, the second guide wall 102 and the first arc-shaped baffle 1021 form a first oil accumulation groove 105.

[0062] This application also provides a gearbox, such as... Figure 7 As shown, the gearbox includes the gearbox lubrication structure described in the above embodiments. Since the gearbox adopts the gearbox lubrication structure described in the above embodiments, the technical effect of the gearbox can be referred to the above embodiments.

[0063] Please see Figures 6 to 8 The gearbox also includes a P-gear parking device 700, which includes a ratchet 710, a pawl 720, and an actuator 730. The ratchet 710 is mounted on a gear shaft within the gearbox. Figures 6 to 8In the embodiment shown, the ratchet 710 is disposed on the first-stage gear shaft 200. Since the first-stage gear shaft 200 is the input shaft of the gearbox, the torque is relatively small. By disposing the ratchet 710 on the first-stage gear shaft 200, only a small force is needed to achieve effective braking. Of course, in other embodiments, the ratchet 710 can also be disposed on the second-stage gear shaft 300, which is not limited here.

[0064] The pawl 720 is rotatably mounted inside the gearbox and can engage with the ratchet 710 to prevent the ratchet 710 from rotating.

[0065] The actuator 730 is connected to the pawl 720 for driving the pawl 720 to move closer to and away from the ratchet 710, so that the pawl 720 engages with the ratchet 710 to lock the gear shaft, or disengages the pawl 720 from the ratchet 710 to unlock the gear shaft.

[0066] Specifically, the actuator 730 includes a motor 731 and a cam linkage mechanism. The motor 730 is located outside the gearbox, and the motor shaft extends through the gearbox housing into the gearbox. The motor shaft is connected to the pawl 720 via the cam linkage mechanism to drive the pawl 720 to reciprocate relative to the ratchet 710.

[0067] As a preferred option, such as Figure 8 As shown, the cam linkage mechanism includes a cam 732 mounted on the motor shaft, and the cam 732 engages with the pawl 720.

[0068] An elastic reset member 740 is provided between the pawl 720 and the gearbox housing. Depending on the relative position of the cam 732 and the pawl 720, the elastic reset member 740 is used to apply a preload force to the pawl 720 to make the pawl 720 move closer to or away from the ratchet 710.

[0069] When the aforementioned P-gear parking device is in use, when the driver presses the P-gear button or turns off the engine, the actuator 730 receives a "engaged" signal, starts the motor 731, and the motor 731 outputs torque. The cam 732 rotates, and under the action of the lever principle, it overcomes the elastic force of the elastic reset member 740. The cam 732 slides relative to the surface of the pawl 720, and the tail of the pawl 720 presses down. After the tail of the pawl 720 aligns with the tooth groove of the ratchet 710, the gear shaft of the reduction gearbox is locked, the power is cut off, and the vehicle cannot move.

[0070] When the driver presses the brake pedal, the controller of the actuator 730 receives an "unlock" signal, starts the motor 731, and generates a reverse torque to the cam 732. Under the return force of the elastic reset member 740, the pawl 720 slides relative to the surface of the ratchet 710, the tail of the pawl 720 exits the tooth groove of the ratchet 710, the ratchet 710 returns to a state where it can rotate freely, the power is restored, and the vehicle moves normally.

[0071] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "a," and / or "the" are not specifically singular and may include the plural. Generally, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements. An element defined by the phrase "comprising an..." does not exclude the presence of other identical elements in the process, method, product, or apparatus that includes the element.

[0072] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0073] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0074] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A gearbox lubrication structure, comprising a gearbox housing, wherein the gearbox housing is provided with a primary shaft bearing mounting hole (100a) for mounting a primary shaft bearing and a secondary shaft bearing mounting hole (100b) for mounting a secondary shaft bearing, characterized in that, The gearbox housing also includes: The first guide wall (101) is disposed on the inner side of the gearbox housing, and the first guide wall (101) is above the first shaft bearing mounting hole (100a) and the second shaft bearing mounting hole (100b); The second guide wall (102) is disposed on the inner side of the gearbox housing. The second guide wall (102) is located below the first shaft bearing mounting hole (100a) and the second shaft bearing mounting hole (100b), along the direction from the second shaft bearing mounting hole (100b) to the first shaft bearing mounting hole (100a). The first guide wall (101) and the second guide wall (102) are close to each other and connected. The second guide wall (102) is provided with a first oil accumulation groove (105) corresponding to the second shaft bearing mounting hole (100b).

2. The gearbox lubrication structure according to claim 1, characterized in that, The first guide wall (101) and the second guide wall (102) are connected at their close ends by a transition guide wall (103). The transition guide wall (103) is provided with an oil collection groove (104). The first slot (1041) of the oil collection groove (104) is used to collect part of the oil flowing along the first guide wall (101) and the transition guide wall (103). The second slot (1042) of the oil collection groove (104) is connected to the shaft bearing mounting hole (100a).

3. The gearbox lubrication structure according to claim 2, characterized in that, The gearbox housing also includes a second oil collection groove (109) and a third oil collection groove (110). The second oil collection groove (109) and the third oil collection groove (110) are both located on the outside of the gearbox housing. The second oil collection groove (109) is located corresponding to the mounting hole (100a) of the first shaft bearing, and the third oil collection groove (110) is located corresponding to the mounting hole (100b) of the second shaft bearing. The second oil collection groove (109) and the third oil collection groove (110) are connected. The second slot (1042) of the oil collection groove (104) is connected to the second oil collection groove (109) through the first oil guide groove (112) located on the hole wall of the mounting hole (100a) of the first shaft bearing. The third oil collection groove (110) is connected to the first oil collection groove (105) through the internal clearance of the second shaft bearing.

4. The gearbox lubrication structure according to any one of claims 1-3, characterized in that, The gearbox housing also includes: The third guide wall (106) is disposed on the side of the first guide wall (101) away from the outer side of the gearbox housing, and is located above the first guide wall (101); The first arc-shaped wall (107) is disposed on the side of the second guide wall (102) away from the outer side of the gearbox housing and is located below the second guide wall (102). The first arc-shaped wall (107) and the third guide wall (106) are smoothly connected by the second arc-shaped wall (108). The first arc-shaped wall (107) is concentrically disposed with the first shaft bearing mounting hole (100a). The first arc-shaped wall (107) constitutes the fourth oil accumulation groove.

5. The gearbox lubrication structure according to claim 4, characterized in that, The second guide wall (102) is provided with a first arc-shaped baffle (1021) that curves upward toward the first guide wall (101). The first arc-shaped baffle (1021) extends to the first arc-shaped wall (107) in a direction away from the outer side of the gearbox housing. The surface of the first arc-shaped baffle (1021) is smoothly connected to the first arc-shaped wall (107) to form the fourth oil accumulation groove. The second guide wall (102) is provided with a second arc-shaped baffle (1022) that curves upward toward the first guide wall (101), and the second arc-shaped baffle (1022), the second guide wall (102) and the first arc-shaped baffle (1021) form the first oil accumulation groove (105).

6. A gearbox, characterized in that, Includes the gearbox lubrication structure as described in any one of claims 1-5.

7. The gearbox according to claim 6, characterized in that, It also includes a P-gear parking device (700), said P-gear parking device (700) comprising: A ratchet (710) is disposed on the gear shaft inside the gearbox; A pawl (720) is rotatably mounted inside the gearbox; An actuator (730) is connected to the pawl (720) for driving the pawl (720) to move closer to and away from the ratchet (710), so that the pawl (720) engages with the ratchet (710) to lock the gear shaft, or disengages the pawl (720) from the ratchet (710) to unlock the gear shaft.

8. The gearbox according to claim 7, characterized in that, The actuator (730) includes: The motor (731) is located outside the gearbox, and the shaft of the motor (731) extends into the gearbox through the gearbox housing; A cam (732) linkage mechanism is provided, wherein the motor (731) shaft is connected to the pawl (720) via the cam (732) linkage mechanism to drive the pawl (720) to reciprocate relative to the ratchet (710).

9. The gearbox according to claim 8, characterized in that, The cam (732) linkage mechanism includes a cam (732) disposed on the shaft of the motor (731), and the cam (732) engages with the pawl (720).

10. The gearbox according to claim 9, characterized in that, An elastic reset member is provided between the pawl (720) and the gearbox housing. The elastic reset member is used to apply a preload force to the pawl (720) to make the pawl (720) move closer to or away from the ratchet (710).

Images