Vertical gear box

Abstract

The utility model relates to a vertical gear box relates to mechanical transmission equipment field, it includes gear box assembly and motor assembly, gear box assembly includes box shell, drive unit, output shaft and sealing ring, box shell sets up assembly hole, and output shaft is rotatably connected with box shell through drive unit, the inner wall surface of sealing ring is provided with a plurality of annular sealing grooves, and sealing ring is fixed in assembly hole, motor assembly includes motor shell and motor shaft, and motor shaft is rotatably connected with motor shell, and motor shell is fixedly connected with box shell, motor shaft is arranged in sealing ring and extends into box shell, and motor shaft is transmission connection with drive unit, and the outer periphery of motor shaft is matched with first sealing surface clearance, and output shaft simultaneously penetrates motor shaft and motor shell, it can improve the sealing property, reduce maintenance replacement cost.

Description

Technical Field

[0001] This utility model relates to the field of mechanical transmission equipment, and more specifically, to a vertical gearbox. Background Technology

[0002] There are two main types of gearbox and motor mating structures: horizontal and vertical. These two types of mating structures can be applied in different situations. In existing vertical gearbox and motor mating structures, the motor is located below the gearbox, and the oil seal at the connection point between the motor and gearbox uses a contact seal, such as a rubber oil seal.

[0003] The inventors discovered during their research that existing vertical gearboxes have at least the following drawbacks:

[0004] 1. Conventional vertical gearboxes use simple contact seals (such as rubber oil seals). Contact seals are prone to wear, leakage, and aging failure during operation, resulting in high replacement and maintenance costs.

[0005] 2. In conventional vertical gearboxes, the vent structure is located at the top of the gearbox body. The height difference between the vent and the oil level is small. When the gearbox operates continuously, the internal air pressure increases and the temperature rises, making the vent cap prone to oil leakage. Currently, the common method is to install a heightened vent pipe on the outside of the gearbox to improve the above-mentioned leakage situation. However, there is a risk of leakage at the joints of the external pipe due to improper installation and sealing or impact, and the protruding pipe is not aesthetically pleasing. Utility Model Content

[0006] The purpose of this invention includes, for example, providing a vertical gearbox that improves sealing performance and reduces maintenance and replacement costs.

[0007] The embodiments of this utility model can be implemented as follows:

[0008] In a first aspect, this utility model provides a vertical gearbox, comprising:

[0009] A gearbox assembly and a motor assembly; the gearbox assembly includes a housing, a transmission unit, an output shaft, and a sealing ring; the housing is provided with an assembly hole, and the output shaft is rotatably connected to the housing via the transmission unit; the inner wall surface of the sealing ring is provided with a plurality of annular sealing grooves spaced apart in its axial direction, and a first sealing surface is formed between adjacent annular sealing grooves; the sealing ring is fixed to the assembly hole;

[0010] The motor assembly includes a motor housing and a motor shaft, the motor shaft being rotatably connected to the motor housing, and the motor housing being fixedly connected to the housing; the motor shaft passes through the sealing ring and extends into the housing, the motor shaft being drively connected to the transmission unit, and the outer circumferential surface of the motor shaft being clearance-fitted with the first sealing surface; the output shaft passes through both the motor shaft and the motor housing, and the output shaft is coaxial with and rotatably connected to the motor shaft.

[0011] In an optional embodiment, a plurality of oil-blocking grooves are provided on the outer peripheral surface of the motor shaft. The plurality of oil-blocking grooves are arranged at intervals along the axial direction of the motor shaft. The groove opening of each oil-blocking groove is aligned and connected with the groove opening of a corresponding annular sealing groove. A second sealing surface is formed between adjacent oil-blocking grooves. The first sealing surface and the second sealing surface are in clearance fit, and the two fit together to allow the lubricating oil to form a sealing oil film.

[0012] Based on the above solution, by setting an oil-blocking groove on the motor shaft, which cooperates with the annular sealing groove on the sealing ring, the probability of oil blockage can be increased, the probability of lubricating oil moving upward along the motor shaft can be reduced, the amount of lubricating oil entering the motor housing can be reduced, and the probability of oil leakage can be reduced. At the same time, the first sealing surface and the second sealing surface cooperate with each other, the gap between them is small, and with the cooperation of the oil-blocking groove and the annular sealing groove, the upward resistance of the lubricating oil is large and the speed is low. The lubricating oil at the gap can form a sealing oil film, thereby improving the sealing effect.

[0013] In an optional embodiment, the depth of the annular sealing groove is greater than the depth of the oil-blocking groove.

[0014] Based on the above scheme, the oil storage capacity of the annular sealing groove is increased, the probability of lubricating oil passing through the sealing ring is small, and the depth of the oil-blocking groove is small. Under the premise of blocking the lubricating oil, it can ensure that the motor shaft has sufficient strength and the motor shaft is not easily deformed or damaged.

[0015] In an optional embodiment, the motor assembly is located on top of the gearbox assembly, and the motor assembly further includes a vent cap mounted on the motor housing.

[0016] Based on the above solution, since the motor assembly is located above the gearbox assembly, the vent cap is installed on the motor housing. The distance between the vent cap and the oil level in the housing is large, forming a sufficient height difference, which is conducive to the full separation of oil and gas, and the vent cap is not prone to oil leakage.

[0017] In an optional embodiment, the motor shaft is provided with a positioning hole and a vent hole, the positioning hole extending axially along the motor shaft; the vent hole is located on the side of the sealing ring away from the motor housing, one end of the vent hole is connected to the positioning hole, and the other end is located on the outer circumferential surface of the motor shaft; the output shaft passes through the positioning hole, and the output shaft and the hole wall of the positioning hole cooperate to define an annular vent channel; the vent hole is connected to the vent channel; the vent channel is connected to the vent cap.

[0018] Based on the above scheme, as the lubricating oil and gas rise together inside the housing, the lubricating oil descends under the action of the sealing ring, and the gas enters the air guide channel from the air guide hole and is discharged from the vent cap along the air guide channel.

[0019] In an optional embodiment, the motor housing includes a main housing and a through cover. The main housing is fixed to the housing. The through cover is connected to the main housing and located on the side of the main housing away from the housing. The output shaft passes through the through cover. A venting channel is provided on the through cover. A vent cap is installed on the through cover, and the air guide channel communicates with the vent cap through the venting channel.

[0020] Based on the above design, the vent cap is positioned high, and the vent cap installed on the vent cap is positioned even higher, reducing the probability of oil leakage at the vent cap. Furthermore, gas can enter the vent cap through the vent channel, allowing for smoother gas discharge.

[0021] In an optional embodiment, the motor assembly further includes an oil baffle plate sleeved around the motor shaft, the oil baffle plate being located between the air guide hole and the sealing ring, and the oil baffle plate having a gap between its perimeter and the housing.

[0022] Based on the above scheme, during the operation of the gearbox assembly, the gears agitate the lubricating oil, which moves towards the sealing ring. Some of the lubricating oil is blocked by the oil baffle and does not directly reach the sealing ring, thus reducing the load on the sealing ring and improving the sealing effect.

[0023] In an optional embodiment, the oil baffle has an annular guide slope facing away from the air vent, and the distance between the annular guide slope and the axis of the motor shaft gradually decreases in the direction from the air vent toward the sealing ring, so that the annular guide slope can guide the lubricating oil toward the side away from the sealing ring.

[0024] Based on the above scheme, when the lubricating oil is agitated to the position beyond the baffle plate, under the action of the sealing ring and gravity, the lubricating oil falls back onto the annular guide slope of the baffle plate. The annular guide slope can guide the lubricating oil away from the sealing ring, reducing the sealing pressure at the location of the sealing ring and improving the sealing effect. Moreover, the lubricating oil can quickly flow back under the guidance of the annular guide slope, and the lubricating oil in the housing can quickly participate in the lubrication cycle, improving the lubrication effect.

[0025] In an optional embodiment, the oil baffle is configured as a bent plate.

[0026] Based on the above solution, the oil baffle has high structural strength, is not easily deformed or damaged, and has a long service life.

[0027] In an optional implementation, the transmission unit is configured as a planetary transmission structure.

[0028] Based on the above scheme, the planetary transmission structure is compact and can achieve a larger transmission ratio in the case of limited space.

[0029] The beneficial effects of this utility model embodiment include, for example:

[0030] In summary, the vertical gearbox provided in this embodiment uses a sealing ring fitted around the motor shaft. The sealing ring has multiple annular sealing grooves, and the sealing ring and motor shaft are in a clearance fit. When the gears and other components inside the gearbox rotate, the lubricating oil inside the housing is agitated to the location of the sealing ring. Due to the obstruction of the annular sealing grooves, the speed of the lubricating oil decreases, and the resistance increases. A sealing oil film is formed between the first sealing surface and the outer circumferential surface of the motor shaft. This non-contact sealing structure achieves sealing of the assembly hole. The sealing ring is not easily worn down and has a long service life, maintaining a good sealing effect continuously, and has low maintenance and replacement costs. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the vertical gearbox in this embodiment;

[0033] Figure 2 for Figure 1 Schematic sectional view along the middle AA direction;

[0034] Figure 3 for Figure 2Enlarged view of point B in the middle;

[0035] Figure 4 for Figure 2 Enlarged view of point C in the middle;

[0036] Figure 5 This is a partial structural schematic diagram of the vertical gearbox in this embodiment.

[0037] icon:

[0038] 001-Oil level; 100-Gearbox assembly; 110-Gearbox housing; 111-Bottom housing; 112-Top cover; 113-Assembly hole; 120-Transmission unit; 121-First planetary carrier; 122-First planetary gear; 123-First ring gear; 124-Second planetary carrier; 125-Second planetary gear; 126-Second ring gear; 127-Sun gear; 130-Output shaft; 140-Sealing ring; 141 - Annular sealing groove; 142 - First sealing surface; 143 - Return groove; 150 - Sealing ring; 160 - Elastic retaining ring; 200 - Motor assembly; 210 - Motor housing; 211 - Main housing; 212 - Through cover; 213 - Vent channel; 220 - Motor shaft; 221 - Air guide hole; 222 - Air guide channel; 223 - Oil baffle groove; 224 - Second sealing surface; 230 - Oil baffle plate; 240 - Vent cap. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0041] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0042] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0043] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0044] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0045] Please refer to Figures 1-5 This embodiment provides a vertical gearbox, including:

[0046] Gearbox assembly 100 and motor assembly 200; gearbox assembly 100 includes housing 110, transmission unit 120, output shaft 130 and sealing ring 140; housing 110 is provided with mounting hole 113, output shaft 130 is rotatably connected to housing 110 through transmission unit 120; the inner wall surface of sealing ring 140 is provided with a plurality of annular sealing grooves 141 arranged at intervals in its axial direction, and a first sealing surface 142 is formed between adjacent annular sealing grooves 141; sealing ring 140 is fixed to mounting hole 113;

[0047] The motor assembly 200 includes a motor housing 210 and a motor shaft 220. The motor shaft 220 is rotatably connected to the motor housing 210, and the motor housing 210 is fixedly connected to the housing 110. The motor shaft 220 passes through the sealing ring 140 and extends into the housing 110. The motor shaft 220 is connected to the transmission unit 120. The outer circumferential surface of the motor shaft 220 is clearance-fitted with the first sealing surface 142. The output shaft 130 passes through both the motor shaft 220 and the motor housing 210. The output shaft 130 is coaxial with the motor shaft 220 and rotatably connected.

[0048] As described above, the working principle of the vertical gearbox provided in this embodiment is as follows:

[0049] In normal operation, the gearbox assembly 100 is located below the motor assembly 200. After the motor assembly 200 starts, the motor shaft 220 rotates, driving the transmission unit 120 to rotate. The transmission unit 120 drives the output shaft 130 to rotate, and the output shaft 130 can output torque, thereby driving the actuator to move. During the operation of the gearbox assembly 100, lubricating oil is injected inside it, and the lubricating oil level 001 is located below the sealing ring 140. When the transmission unit 120 runs, it agitates the lubricating oil, causing some of the lubricating oil to move towards the sealing ring 140. Because the sealing ring 140 is provided with multiple annular sealing grooves 141, and the sealing ring 140 and the motor shaft 220 are in clearance fit, the speed of the lubricating oil decreases and the resistance increases under the obstruction of the annular sealing grooves 141. This allows some of the lubricating oil to form a sealing oil film between the first sealing surface 142 and the outer peripheral surface of the motor shaft 220. The non-contact sealing structure achieves sealing, making the sealing ring 140 less prone to wear and failure, with a long service life, and able to maintain a good sealing effect continuously, resulting in low maintenance and replacement costs.

[0050] The following embodiments illustrate the details of the vertical gearbox of this application by way of example.

[0051] Please refer to Figures 1-5 In this embodiment, optionally, the vertical gearbox includes a gearbox assembly 100 and a motor assembly 200, the gearbox assembly 100 and the motor assembly 200 are connected, and the motor assembly 200 is located above the gearbox assembly 100.

[0052] Optionally, the gearbox assembly 100 includes a housing 110, a transmission unit 120, an output shaft 130, a sealing ring 140, and a sealing ring 150. The transmission unit 120 is installed inside the housing 110, and the output shaft 130 is drive-connected to the transmission unit 120, extending beyond the top of the housing 110. The sealing ring 140 is connected to the housing 110 and seals the position where the output shaft 130 extends beyond the housing 110. The sealing ring 150 is installed between the sealing ring 140 and the housing 110, improving the sealing performance between them.

[0053] The housing 110 can be configured as a split structure, comprising a bottom shell 111 and a top cover 112. The top cover 112 can be fixed to the top of the bottom shell 111 with bolts. A mounting hole 113 is provided in the center of the top cover 112; the mounting hole 113 can be a circular through hole. A sealing ring 150 is sleeved on the outside of a sealing ring 140, and the sealing ring 140 is inserted and fixed within the mounting hole 113, engaging with the wall of the mounting hole 113 to clamp the sealing ring 150. The sealing ring 150 improves the sealing performance between the wall of the mounting hole 113 and the sealing ring 140. Furthermore, the sealing ring 140 is fixed within the mounting hole 113 and will not rotate relative to it; the sealing ring 150 provides a static seal and is not easily worn or failed.

[0054] Furthermore, the inner wall surface of the sealing ring 140 is provided with a plurality of annular sealing grooves 141 arranged at intervals along its axial direction, and a first sealing surface 142 is formed between adjacent annular sealing grooves 141. For example, in this embodiment, the number of annular sealing grooves 141 can be four. At the same time, a return groove 143 is provided on the bottom side of the sealing ring 140, that is, the side away from the motor housing 210. The return groove 143 communicates with the plurality of annular sealing grooves 141, and the lubricating oil entering the annular sealing grooves 141 can return to the housing 110 from the return groove 143.

[0055] Optionally, an annular groove can be provided on the wall of the mounting hole 113, and an elastic retaining ring 160 can be engaged in the annular groove. The bottom side of the sealing ring 140 contacts the top surface of the elastic retaining ring 160. After the top cover 112 is fixed to the bottom shell 111, the bottom surface of the top cover 112 contacts the top surface of the sealing ring 140. In this way, the top cover 112 and the elastic retaining ring 160 cooperate to clamp and position the sealing ring 140.

[0056] Please refer to Figures 1-5Optionally, the transmission unit 120 is configured as a planetary transmission structure. The transmission unit 120 has a compact structure and can achieve a larger transmission ratio in situations with limited space. For example, in this embodiment, the transmission unit 120 includes a first planet carrier 121, a first planet gear 122, a first ring gear 123, a second planet carrier 124, a second planet gear 125, a second ring gear 126, and a sun gear 127. The first ring gear 123 is fixed inside the base shell 111. The first planet carrier 121 is rotatably connected to the base shell 111. The first planet gear 122 is rotatably mounted on the first planet carrier 121 and meshes with the first ring gear 123. The power from the motor assembly 200 can be transmitted to the first planet gear 122. The sun gear 127 is sleeved on the output shaft 130, and the two are rotatably connected. The sun gear 127 is fixedly connected to the first planet carrier 121. The second planetary carrier 124 is rotatably mounted within the base housing 111. The second planetary gear 125 is rotatably mounted on the second planetary carrier 124. The second ring gear 126 is fixed within the base housing 111. The second planetary gear 125 meshes with both the sun gear 127 and the second ring gear 126. The output shaft 130 passes through the second planetary carrier 124 and is fixedly connected to it. In this way, the motor assembly 200 transmits torque to the first planetary gear 122. The first planetary gear 122 rotates on its own axis and revolves under the action of the first ring gear 123, thereby driving the first planetary carrier 121 to rotate. The first planetary carrier 121 transmits power to the sun gear 127, causing the sun gear 127 to rotate, which in turn drives the second planetary gear 125 to rotate. The second planetary gear 125 rotates on its own axis and revolves under the action of the second ring gear 126, thereby driving the second planetary carrier 124 to rotate. Finally, the power is transmitted to the output shaft 130, causing the output shaft 130 to rotate. The torque of the motor assembly 200 is transmitted to the output shaft 130 through a two-stage planetary reduction structure, and the speed ratio adjustment range is large.

[0057] It should be understood that in other embodiments, the transmission unit 120 may also be other structures, etc.

[0058] Furthermore, the motor shaft 220 is a gear shaft, meaning that a gear portion can be integrally formed on the motor shaft 220, and the gear portion can mesh with the first planetary gear 122. Alternatively, in other embodiments, the motor shaft 220 is an optical shaft, and a gear can be fitted onto the motor shaft 220. The gear is fixedly connected to the motor shaft 220 via a spline or the like, and the gear meshes with the first planetary gear 122 to achieve torque transmission.

[0059] Please refer to Figures 1-5In this embodiment, optionally, the motor assembly 200 includes a motor housing 210, a motor shaft 220, an oil baffle 230, and a vent cap 240. The motor shaft 220 is rotatably connected to the motor housing 210, and the motor housing 210 is fixedly connected to the housing 110. The motor shaft 220 passes through the sealing ring 140 and extends into the housing 110. The motor shaft 220 can be a gear shaft, and the gear portion on the motor shaft 220 meshes with the first planetary gear 122 of the transmission unit 120. The outer peripheral surface of the motor shaft 220 is clearance-fitted with the first sealing surface 142. The output shaft 130 passes through both the motor shaft 220 and the motor housing 210, and the output shaft 130 is coaxial with and rotatably connected to the motor shaft 220. The vent cap 240 is connected to the motor housing 210, and the oil baffle 230 is connected to the motor shaft 220.

[0060] The motor housing 210 can be configured as a split structure, comprising a main housing 211 and a cover 212. The main housing 211 is fixed to the top of the top cover 112. The cover 212 is connected to the main housing 211 and located on the side of the main housing 211 away from the top cover 112. A ventilation channel 213 is provided on the cover 212. A ventilation cap 240 is installed on the cover 212, and the ventilation channel 213 connects to the ventilation cap 240.

[0061] Meanwhile, the motor shaft 220 is provided with a positioning hole and a vent hole 221. The positioning hole is a circular through hole that extends along the axial direction of the motor shaft 220 and is coaxial with the motor shaft 220. The vent hole 221 is located on the side wall of the motor shaft 220. The vent hole 221 can be a circular hole, with one end connected to the positioning hole and the other end located on the outer circumferential surface of the motor shaft 220. There can be multiple vent holes 221, which are evenly spaced around the axis of the positioning hole. Multiple oil-blocking grooves 223 are provided on the outer circumferential surface of the motor shaft 220. The multiple oil-blocking grooves 223 are spaced apart along the axial direction of the motor shaft 220. For example, in this embodiment, there are four oil-blocking grooves 223. Each oil-blocking groove 223 is an annular sealing groove 141 surrounding the motor shaft 220, and a second sealing surface 224 is formed between adjacent oil-blocking grooves 223. After the motor assembly 200 and gearbox assembly 100 are engaged, the bottom of the motor shaft 220 passes through the sealing ring 140 and is inserted into the bottom housing 111. The opening of each oil baffle groove 223 is aligned and connected with the opening of a corresponding annular sealing groove 141. The first sealing surface 142 and the corresponding second sealing surface 224 are in clearance fit, which allows the lubricating oil to form a sealing oil film. The vent 221 is located below the sealing ring 140, that is, the vent 221 is located on the side of the sealing ring 140 away from the motor housing 210, and the vent 221 is located above the oil level 001 inside the housing 110. The output shaft 130 passes through the positioning hole, passes through the top of the motor shaft 220 and passes through the cover 212. The cover 212 and the motor shaft 220 can be rotatably engaged by bearings to improve the stability of the output shaft 130. An annular air guide channel 222 is formed between the output shaft 130 and the wall of the positioning hole, and the air guide hole 221 connects to the air guide channel 222. The air guide channel 222 connects to the vent channel 213. Thus, the housing 110 can connect to the air guide channel 222 through the air guide hole 221, and then to the vent cap 240 through the vent channel 213. After the temperature of the lubricating oil in the housing 110 rises, the oil-gas mixture rises and separates in the air guide hole 221. The gas can enter the air guide channel 222 from the air guide hole 221, rise along the air guide channel 222, and be discharged from the vent cap 240 through the vent channel 213. Since the air guide channel 222 is formed inside the motor shaft 220 and has a long distance, some of the oil-gas mixture enters the air guide channel 222. During the movement of the oil-gas mixture in the air guide channel 222, the lubricating oil in the oil-gas mixture can be fully separated, and the amount of lubricating oil carried in the gas is small, reducing the probability of oil leakage from the vent cap 240.

[0062] Optionally, the oil baffle 230 can be welded or snap-fitted to the outside of the motor shaft 220. The oil baffle 230 is located between the air guide hole 221 and the sealing ring 140, and there is a gap between the oil baffle 230 and the housing 110. During the operation of the gearbox assembly 100, the gears agitate the lubricating oil, which moves towards the sealing ring 140. Some of the lubricating oil is blocked by the oil baffle 230 and does not directly reach the sealing ring 140, thus reducing the load on the sealing ring 140 and improving the sealing effect.

[0063] Furthermore, the oil baffle 230 has an annular guide slope facing away from the air guide hole 221. The distance between the annular guide slope and the axis of the motor shaft 220 gradually decreases in the direction from the air guide hole 221 to the sealing ring 140, so that the annular guide slope can guide the lubricating oil to the side away from the sealing ring 140.

[0064] It should be understood that the oil baffle 230 can be configured as a bent plate. The oil baffle 230 has high structural strength, is not easily deformed or damaged, and has a long service life.

[0065] The vertical gearbox provided in this embodiment features a non-contact seal between the sealing ring 140 and the motor shaft 220. The sealing ring 140 experiences minimal wear, is less prone to failure, exhibits excellent sealing performance, and has low maintenance and replacement costs. Simultaneously, the motor assembly 200 is located above the gearbox assembly 100. A vent cap 240 is installed on the top cover 212 of the motor assembly 200. The vent cap 240 is significantly distanced from the oil level 001 inside the gearbox housing 110, resulting in a long path for the oil-gas mixture to move towards the vent cap 240. This allows for thorough separation of the oil-gas mixture, minimizing the amount of lubricating oil carried in the gas and reducing oil leakage from the vent cap 240.

[0066] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A vertical gearbox, characterized in that, include: A gearbox assembly (100) and a motor assembly (200); the gearbox assembly (100) includes a housing (110), a transmission unit (120), an output shaft (130), and a sealing ring (140); the housing (110) is provided with an assembly hole (113), and the output shaft (130) is rotatably connected to the housing (110) through the transmission unit (120); the inner wall surface of the sealing ring (140) is provided with a plurality of annular sealing grooves (141) spaced apart in its axial direction, and a first sealing surface (142) is formed between adjacent annular sealing grooves (141); the sealing ring (140) is fixed to the assembly hole (113). The motor assembly (200) includes a motor housing (210) and a motor shaft (220). The motor shaft (220) is rotatably connected to the motor housing (210), and the motor housing (210) is fixedly connected to the housing (110). The motor shaft (220) passes through the sealing ring (140) and extends into the housing (110). The motor shaft (220) is drive-connected to the transmission unit (120), and the outer circumferential surface of the motor shaft (220) is clearance-fitted with the first sealing surface (142). The output shaft (130) passes through both the motor shaft (220) and the motor housing (210). The output shaft (130) is coaxial with the motor shaft (220) and rotatably connected.

2. The vertical gearbox according to claim 1, characterized in that: The outer circumferential surface of the motor shaft (220) is provided with a plurality of oil-blocking grooves (223), which are arranged at intervals along the axial direction of the motor shaft (220). The groove opening of each oil-blocking groove (223) is aligned and connected with the groove opening of a corresponding annular sealing groove (141). A second sealing surface (224) is formed between adjacent oil-blocking grooves (223). The first sealing surface (142) and the second sealing surface (224) are fitted with a clearance, and the two fit together to allow the lubricating oil to form a sealing oil film.

3. The vertical gearbox according to claim 2, characterized in that: The depth of the annular sealing groove (141) is greater than the depth of the oil baffle groove (223).

4. The vertical gearbox according to claim 1, characterized in that: The motor assembly (200) is located on top of the gearbox assembly (100), and the motor assembly (200) also includes a vent cap (240) which is mounted on the motor housing (210).

5. The vertical gearbox according to claim 4, characterized in that: The motor shaft (220) is provided with a positioning hole and a vent hole (221). The positioning hole extends along the axial direction of the motor shaft (220). The vent hole (221) is located on the side of the sealing ring (140) away from the motor housing (210). One end of the vent hole (221) is connected to the positioning hole, and the other end is located on the outer circumferential surface of the motor shaft (220). The output shaft (130) passes through the positioning hole. The output shaft (130) and the hole wall of the positioning hole cooperate to define an annular vent channel (222). The vent hole (221) is connected to the vent channel (222). The vent channel (222) is connected to the vent cap (240).

6. The vertical gearbox according to claim 5, characterized in that: The motor housing (210) includes a main housing (211) and a cover (212). The main housing (211) is fixed to the housing (110). The cover (212) is connected to the main housing (211) and is located on the side of the main housing (211) away from the housing (110). The output shaft (130) passes through the cover (212). A ventilation channel (213) is provided on the cover (212). A ventilation cap (240) is installed on the cover (212), and the air guide channel (222) is connected to the ventilation cap (240) through the ventilation channel (213).

7. The vertical gearbox according to claim 5, characterized in that: The motor assembly (200) also includes an oil baffle (230), which is sleeved on the outside of the motor shaft (220). The oil baffle (230) is located between the air guide hole (221) and the sealing ring (140), and the oil baffle (230) has a gap with the housing (110) around its perimeter.

8. The vertical gearbox according to claim 7, characterized in that: The oil baffle (230) has an annular guide slope away from the air guide hole (221), and the distance between the annular guide slope and the axis of the motor shaft (220) gradually decreases in the direction from the air guide hole (221) to the sealing ring (140), so that the annular guide slope can guide the lubricating oil to the side away from the sealing ring (140).

9. The vertical gearbox according to claim 7, characterized in that: The oil baffle (230) is configured as a bent plate.

10. The vertical gearbox according to any one of claims 1-9, characterized in that: The transmission unit (120) is configured as a planetary transmission structure.

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