CN220850692U - Gearbox structure, gearbox, electric drive axle and vehicle - Google Patents

Abstract

The utility model belongs to the technical field of vehicle engineering, and relates to a gearbox structure, a reduction gearbox, an electric drive axle and a vehicle; based on the structure of the gearbox or the gearbox body, a pump body structure and a circulating pipeline are additionally arranged, and a forced circulation lubrication and cooling structure driven by the power of the gearbox or the gearbox is constructed in the cavity of the pump body structure; the shafting comprises a first transmission shaft, a second transmission shaft and a third transmission shaft; the pump body is driven by a middle shaft or an input shaft through shape matching, fluid medium is sucked into the box body through a gearbox or a reduction gearbox body and a special pipeline, and lubrication and cooling of a preset area are realized by combining a hollow shaft structure and an injection hole; the utility model can obviously reduce the size of the drive axle in the front-rear direction, thereby being beneficial to the implementation of compact vehicle layout and being suitable for vehicle types with sufficient space in the height direction; in addition, by selecting a proper oil pump size, a minimum flow which just meets the lubrication requirement can be realized; a forced lubrication and cooling process of the vertically arranged gearbox or reduction gearbox is obtained.

Description

Gearbox structure, gearbox, electric drive axle and vehicle

Technical Field

The utility model belongs to the technical field of vehicle engineering, and particularly relates to a gearbox structure, a reduction gearbox, an electric drive axle and a vehicle.

Background

The gearbox is essential as a core unit of a vehicle power assembly, whether an electric car or an oil car; the size of the gearbox is still sensitive to the layout of all parts of the whole vehicle, and is limited to the technical levels of the existing materials, structures and the like; for some vehicle types, in order to adapt to the space with limited wheelbase direction, a driving axle and/or a gearbox which are vertically arranged are more beneficial to engineering realization; however, lubrication of the vertically disposed drive axle and/or the upper gearbox half is significantly impaired and may lead to functional failure during operation.

Disclosure of Invention

The embodiment of the utility model discloses a gearbox structure, which comprises a gearbox body, a shafting, a medium circulating pump and a medium circulating channel, wherein the shafting is arranged on the gearbox body; the shafting comprises a first transmission shaft, a second transmission shaft and a third transmission shaft, wherein the first transmission shaft, the second transmission shaft and the third transmission shaft are horizontally arranged on an inner bearing of a gearbox body, a fluid medium is poured into the gearbox body, and the fluid medium flows through a medium circulation channel of the gearbox body under the drive of a medium circulation pump; the first port of the medium circulation channel is fixedly connected inside the gearbox body, and the height of the first port is smaller than the initial liquid level of the fluid medium; the first port of the transmission body is communicated with one end of a fluid medium channel in the transmission body through a circulating pipeline component, and the other end of the medium channel is communicated with a medium circulating pump; the main shaft of the medium circulating pump is connected with the second transmission shaft through shape matching; one end of the second transmission shaft, which is matched and connected with the medium circulating pump, is fixed on the gearbox body through the bearing part. Wherein, the height difference between the first transmission shaft and the second transmission shaft and the initial liquid level of the fluid medium is larger than the height difference between the third transmission shaft and the initial liquid level of the fluid medium; namely: the third drive shaft is not in a plane with the first or second drive shaft and at least a distance is defined by the difference in height as described above.

On the other hand, the medium circulating pump comprises a pump body cover plate component, a pump first rotor and a pump second rotor; the part surrounded by the pump body cover plate component and the gearbox body forms a first cavity of the medium circulating pump; the first rotor is fixedly connected to the main shaft of the pump, and the first rotor and the second rotor are matched to form a medium suction area and a medium discharge area.

Specifically, the first transmission shaft can be set as a power input shaft, the second transmission shaft is an intermediate shaft, and the third transmission shaft is a power output shaft; the first transmission shaft can be provided with torque by the motor and/or the engine; the second transmission shaft transmits the torque of the first transmission shaft to the third transmission shaft; the third transmission shaft transmits torque to a load; the first bearing of the second transmission shaft is fixedly connected inside the first chamber.

In order to further improve the lubrication and circulation of the fluid medium, namely the temperature regulation capability, the structural embodiment of the utility model can be further provided with a fluid medium filtering component; the fluid medium filtering component is connected to the first port of the medium circulating channel and is immersed below the initial fluid medium level; the fluid medium filter component can be used for removing impurities in a fluid medium, and improving the fluid characteristics and other functions of the fluid medium filter component; the other end of the circulating pipeline component is communicated with an inner hole of the gearbox body; an inner hole of the gearbox body is communicated with a medium suction cavity of the medium circulating pump through a medium channel in the inner hole of the gearbox body; the fluid medium enters a circulating channel of the gearbox body under the pumping of the medium circulating pump, and the circulating channel is communicated with a preset part needing lubrication and/or maintaining a temperature index.

The contact surface of the pump body cover plate component and the medium circulating pump can be further provided with an oil drain hole, and the oil drain hole lubricates a bearing of the second transmission shaft; the main shaft of the medium circulating pump is connected with the second transmission shaft in a spline fit way.

Correspondingly, the embodiment of the invention also discloses a reduction gearbox which is constructed by adopting any structure; the speed reducing box can be composed of a speed changing box body, a shafting, a medium circulating pump, a medium circulating channel and the like; the shafting comprises a first transmission shaft, a second transmission shaft and a third transmission shaft, wherein the first transmission shaft, the second transmission shaft and the third transmission shaft are horizontally arranged on a gearbox body, a fluid medium is filled in the gearbox body, and the fluid medium flows through a medium circulation channel under the drive of a medium circulation pump; the first port of the medium circulation channel is fixedly connected in the gearbox body, and the height of the first port is small than the initial liquid level of the fluid medium; the first port of the transmission body is communicated with one end of a fluid medium channel in the transmission body through a circulating pipeline component, and the other end of the medium channel is communicated with a medium circulating pump; the main shaft of the medium circulating pump is connected with the second transmission shaft through shape matching; one end of the second transmission shaft, which is matched and connected with the medium circulating pump, is fixed on the gearbox body through the bearing part.

Specifically, the first transmission shaft, the second transmission shaft and the third transmission shaft can be mounted on the gearbox body through bearing components; in practical application, the device is particularly suitable for the situation that the height difference between the first transmission shaft and the second transmission shaft and the initial liquid level of the fluid medium is larger than the height difference between the third transmission shaft and the initial liquid level of the fluid medium.

The medium circulating pump comprises a pump body cover plate component, a pump first rotor and a pump second rotor; the pump body cover plate component and the gearbox body surround part to form a first cavity of the medium circulating pump; the first rotor is fixedly connected to the main shaft of the pump, and the first rotor and the second rotor are matched to form a medium suction area and a medium discharge area.

In practical application, the first transmission shaft of the reduction gearbox can be used as a power input shaft, the second transmission shaft is a middle shaft, and the third transmission shaft is a power output shaft; the first drive shaft may be torque supplied by an electric machine or an engine; the second transmission shaft transmits the torque of the first transmission shaft to the third transmission shaft; the third drive shaft in turn transmits torque to the load of the gearbox; the first bearing of the second transmission shaft can be fixedly connected with the content of the first cavity.

Similarly, embodiments of the present utility model also disclose an electric drive axle comprising any of the gearbox arrangements and/or any of the reduction gearbox arrangements described above; the first transmission shaft is driven by a motor; the gearbox structure and/or the reduction gearbox adopt a vertical arrangement structure, and a first transmission shaft, a second transmission shaft and a third transmission shaft of the gearbox structure and/or the reduction gearbox are arranged on a gearbox body and/or a reduction gearbox body through bearing components; the height difference between the first transmission shaft and the second transmission shaft and the initial liquid level of the fluid medium is larger than that between the third transmission shaft and the initial liquid level of the fluid medium; similarly, the first transmission shaft can be used as a power input shaft, the second transmission shaft is an intermediate shaft, and the third transmission shaft is used as a power output shaft.

Wherein the first drive shaft is torque provided by a motor or engine; the second transmission shaft transmits the torque of the first transmission shaft to the third transmission shaft; the third transmission shaft transmits torque to a load of the gearbox or the reduction gearbox; the first bearing of the second transmission shaft can be fixedly connected with the first cavity, and the inside of the pump body is lubricated.

In addition, the embodiment of the utility model also discloses a vehicle which comprises any gearbox structure and/or any reduction gearbox and/or any electric drive axle; the electric drive axle is vertically arranged in the cabin, a first drive shaft of the electric drive axle is a power input shaft, a second drive shaft is an intermediate shaft, a third drive shaft is a power output shaft or a differential mechanism output shaft, the first drive shaft and the second drive shaft are positioned in a direction away from the static storage liquid level of the fluid medium or higher than the third drive shaft, and the fluid medium is used for circularly flowing in the gearbox; the first transmission shaft can be provided with torque by the motor and/or the engine; the second transmission shaft transmits the torque of the first transmission shaft to the third transmission shaft; the third transmission shaft transmits torque to a load; the load and the gearbox are connected by a differential mechanism; the first bearing of the second transmission shaft can be fixedly connected with a cavity formed by the cover plate component of the pump body of the medium circulating pump and the surrounding part of the gearbox body.

In summary, the utility model is based on a gearbox or a gearbox body structure, a pump body structure and a circulating pipeline are additionally arranged, and a forced circulation lubrication and cooling structure driven by the power of the gearbox or the gearbox is constructed in the cavity of the pump body structure; the shafting comprises a first transmission shaft, a second transmission shaft and a third transmission shaft; the pump body is driven by the intermediate shaft or the input shaft through shape matching, and the pump body sucks fluid medium into the box body through a gearbox or a reduction gearbox body and a special pipeline, and combines a hollow shaft structure and an injection hole to realize lubrication and cooling of a preset area.

The utility model can obviously reduce the size of the drive axle in the front-rear direction, thereby being beneficial to the implementation of compact vehicle layout and being suitable for vehicle types with sufficient space in the height direction; in addition, by selecting the appropriate oil pump size, a minimum flow rate that just meets the lubrication requirements can be achieved; a forced lubrication and cooling process of the vertically arranged gearbox or reduction gearbox is obtained.

It should be noted that, the terms "first", "second", and the like are used herein merely to describe each component in the technical solution, and do not constitute a limitation on the technical solution, and are not to be construed as indicating or implying importance of the corresponding component; elements with "first", "second" and the like mean that in the corresponding technical solution, the element includes at least one.

Drawings

In order to more clearly illustrate the technical solution of the present utility model, the technical effects, technical features and objects of the present utility model will be further understood, and the present utility model will be described in detail below with reference to the accompanying drawings, which form a necessary part of the specification, and together with the embodiments of the present utility model serve to illustrate the technical solution of the present utility model, but not to limit the present utility model.

Like reference numerals in the drawings denote like parts, in particular:

Fig. 1 is a schematic diagram of a shafting layout structure according to an embodiment of the present utility model.

Fig. 2 is a schematic diagram of a shafting layout structure according to an embodiment of the present utility model.

FIG. 3 is a schematic diagram of a cooling medium circuit layout according to an embodiment of the utility model.

Fig. 4 is a schematic cross-sectional view of an assembled structure of a second transmission shaft and a pump body according to an embodiment of the present utility model.

FIG. 5 is a schematic diagram of the pump body circulation medium partition and flow direction according to an embodiment of the present utility model.

FIG. 6 is a schematic diagram of a medium channel on a body of an embodiment of the product of the present utility model.

FIG. 7 is a schematic cross-sectional view of a lubrication channel according to an embodiment of the present utility model.

FIG. 8 is a schematic cross-sectional view of a lubrication channel according to an embodiment of the present utility model.

Fig. 9 is a schematic diagram of a layout structure of a vehicle product according to an embodiment of the utility model.

Fig. 10 is a schematic diagram of a layout structure of a vehicle product according to an embodiment of the utility model.

Wherein:

003-vertical upward direction;

010-gearbox body;

090—initial liquid level;

100-a first transmission shaft;

111-a first drive shaft bearing cavity;

200-a second transmission shaft;

210-a shaft adapter;

220-a second drive shaft inner bore;

222-second drive shaft media access;

300-a third transmission shaft;

400-a fluid medium filter element;

410-a first port;

500-circulation line components;

600-a fluid medium passage in the gearbox body;

700-medium circulation pump;

707—rotor rotational direction;

710—a pump spindle;

721-pump first rotor;

722-a pump second rotor;

730-pump body cover plate component;

740-media intake side;

744-media intake zone;

750-medium discharge side;

755-media discharge zone;

770-medium channels in the pump body shaft;

777-media discharge passage;

789-a second media channel;

799-bearings, such as needle bearings of the release mechanism;

900-vehicle;

911-electric drive axle;

922-reduction gearbox;

933-motor;

944—drive the device.

Detailed Description

The present utility model will be described in further detail with reference to the accompanying drawings and examples. Of course, the following specific examples are set forth only to illustrate the technical solution of the present utility model, and are not intended to limit the present utility model. Furthermore, the parts expressed in the examples or drawings are merely illustrative of the relevant parts of the present utility model, and not all of the present utility model.

The gearbox structure shown in fig. 1 comprises a gearbox body 010, a shafting, a medium circulating pump 700 and a medium circulating channel; the shafting comprises a first transmission shaft 100, a second transmission shaft 200 and a third transmission shaft 300, wherein the first transmission shaft 100, the second transmission shaft 200 and the third transmission shaft 300 are horizontally arranged on an internal bearing of a gearbox body 010, a fluid medium or lubricating oil is poured into the gearbox body 010, and the fluid medium or lubricating oil flows through a medium circulation channel under the driving of a medium circulation pump 700.

As shown in fig. 1 and 3, the first port 410 of the medium circulation channel is fixedly connected to the inside of the transmission case body 010, and the height of the inlet and outlet of the first port 410 is smaller than the initial liquid level 090 of the fluid medium; the first port 410 communicates with one end of a fluid medium passage 600 in the transmission body via a circulation line member 500, and the other end of the medium passage 600 communicates with a medium circulation pump 700; the pump main shaft 710 of the medium circulation pump 700 is connected with the second transmission shaft 200 by a form fit; one end of the second transmission shaft 200, which is connected with the medium circulation pump 700 in a matching way, is fixed to the gearbox body 010 through a bearing part.

Specifically, as shown in fig. 1, the first drive shaft 100 and the second drive shaft 200 each have a height difference from the initial liquid level 090 of the fluid medium that is greater than the height difference from the initial liquid level 090 of the fluid medium of the third drive shaft 300.

Further, as shown in fig. 4 and 5, the medium circulation pump 700 includes a pump body cover member 730, a pump first rotor 721, and a pump second rotor 722; wherein the portion surrounded by the pump body cover member 730 and the transmission case body 010 forms a first chamber of the medium circulation pump 700; the first pump rotor 721 may be fixedly coupled to the pump spindle 710, and the first pump rotor 721 and the second pump rotor 722 cooperate to form a medium suction area 744 and a medium discharge area 755.

Specifically, as shown in fig. 1 and 4, the first transmission shaft 100 is a power input shaft, the second transmission shaft 200 is an intermediate shaft, and the third transmission shaft is a power output shaft; the first drive shaft 100 is provided with torque by an electric machine and/or an engine; second drive shaft 200 transfers torque from first drive shaft 100 to third drive shaft 300; third drive shaft 300 transfers torque to a load; the first bearing of the second transmission shaft 200 is fixedly connected inside the first chamber.

Further, as shown in fig. 3, a fluid medium filtering component 400 is generally provided in practical application; the fluid media filter element 400 is connected to a media circulation channel first port 410; the fluid medium filter element 400 must be submerged below the initial fluid medium level; the fluid medium filter element 400 is used for removing impurities in the fluid medium; the other end of the circulating pipeline component 500 is communicated with an inner hole of the gearbox body 010; an inner hole of the gearbox body 010 is communicated with a medium suction cavity of the medium circulating pump 700 through a fluid medium channel 600 in the gearbox body; the fluid medium enters a circulation channel of the transmission case body 010 under the pumping of the medium circulation pump 700, and the circulation channel is communicated with a preset part which needs to be lubricated and/or maintain a temperature index.

Specifically, as shown in fig. 8, an oil drain hole and/or a second medium channel 789 may be provided on the contact surface of the pump body cover member 730 and the medium circulation pump 700, where the oil drain hole or the second medium channel 789 lubricates the bearing 799 of the second transmission shaft 200; the manner in which the pump spindle 710 of the medium circulation pump 700 is connected to the second drive shaft 200 includes a spline-fit connection. Similarly, the reduction gearbox 922 as shown in fig. 3, 8, 10 may be provided with a gearbox arrangement as disclosed in any of the above: wherein the speed reducer comprises a speed reducer body 010, a shafting, a medium circulating pump 700 and a medium circulating channel; the shafting comprises a first transmission shaft 100, a second transmission shaft 200 and a third transmission shaft 300, wherein the first transmission shaft 100, the second transmission shaft 200 and the third transmission shaft 300 are horizontally arranged on a gearbox body 010, a fluid medium is filled in the gearbox body 010, and the fluid medium flows through a medium circulation channel under the driving of a medium circulation pump 700; the first port 410 of the medium circulation channel is fixedly connected to the interior of the transmission case body 010, and the height of the inlet and outlet of the first port 410 is smaller than the initial liquid level 090 of the fluid medium; the first port 410 is communicated with one end of a fluid medium channel 600 in the gearbox body through a circulating pipeline component 500, and the other end of the medium channel 600 is communicated with a medium circulating pump 700; as shown in fig. 4, a pump main shaft 710 of the medium circulation pump 700 is connected with the second transmission shaft 200 through a form fit; one end of the second transmission shaft 200, which is matched and connected with the medium circulating pump 700, is fixed on the gearbox body 010 through a bearing part.

As shown in fig. 1, the first transmission shaft 100, the second transmission shaft 200, and the third transmission shaft 300 are mounted on the transmission case body 010 via bearing members; the difference in height between each of the first drive shaft 100 and the second drive shaft 200 and the initial liquid level 090 of the fluid medium is greater than the difference in height between the third drive shaft 300 and the initial liquid level 090 of the fluid medium.

Specifically, as shown in fig. 3, 4, and 5, the medium circulation pump 700 includes a pump body cover member 730, a pump first rotor 721, and a pump second rotor 722; a portion surrounded by the pump body cover member 730 and the transmission case body 010 forms a first chamber of the medium circulation pump 700; the pump first rotor 721 is fixedly connected to the pump main shaft 710, and the pump first rotor 721 and the second rotor 722 cooperate to form a medium suction area 744 and a medium discharge area 755.

Wherein, as shown in the figure, the first transmission shaft 100 is a power input shaft, the second transmission shaft 200 is an intermediate shaft, and the third transmission shaft is a power output shaft; the first drive shaft 100 is provided with torque by an electric machine or engine; second drive shaft 200 transfers torque from first drive shaft 100 to third drive shaft 300; third drive shaft 300 transfers torque to the load of the gearbox; the first bearing of the second transmission shaft 200 is fixedly connected to the first chamber.

In addition, the electric drive axle 911 as shown in fig. 1, 9, including the gearbox arrangement and/or any one of the reduction gearbox arrangements as described above; the first drive shaft 100 thereof is driven by a motor 933; the gearbox structure and/or the reduction gearbox 922 may adopt a vertical arrangement structure, and the first transmission shaft 100, the second transmission shaft 200 and the third transmission shaft 300 of the gearbox structure and/or the reduction gearbox 922 are installed on the gearbox body 010 and/or the reduction gearbox 922 body through bearing components; the average height difference 001 between the first transmission shaft 100 and the second transmission shaft 200 and the third transmission shaft 300 is greater than a preset height difference threshold; the average height difference 001 is a vertical distance from the third transmission shaft 300 along the height direction 003 at the midpoint of the vertical direction between the first transmission shaft 100 and the second transmission shaft 200; the first transmission shaft 100 is a power input shaft, the second transmission shaft 200 is an intermediate shaft, and the third transmission shaft is a power output shaft; the first drive shaft 100 is provided with torque by an electric machine or engine; second drive shaft 200 transfers torque from first drive shaft 100 to third drive shaft 300; third drive shaft 300 transfers torque to the load of the gearbox; the first bearing of the second transmission shaft 200 is fixedly connected to the first chamber.

Similarly, a vehicle 900 as shown in fig. 9, 10, comprising a gearbox arrangement, a reduction gearbox arrangement and/or an electric drive axle as disclosed in any of the above; the electric drive axle 911 is vertically arranged in the cabin, the first drive axle 100 of the electric drive axle 911 is a power input shaft, the second drive axle 200 is an intermediate shaft, the third drive axle 300 is a power output shaft or a differential mechanism output shaft, the first drive axle 100 and the second drive axle 200 are positioned in the direction away from the static storage liquid level of the fluid medium or higher than the third drive axle 300, and the fluid medium is used for circulating flow in the gearbox; the first drive shaft 100 is provided with torque by an electric machine and/or an engine; second drive shaft 200 transfers torque from first drive shaft 100 to third drive shaft 300; third drive shaft 300 transfers torque to a load; the connection of the load and the gearbox comprises the connection adopting a differential mechanism; the first bearing of the second transmission shaft 200 is fixedly connected inside the first chamber; the first chamber is a chamber formed by the pump body cover member 730 of the medium circulation pump 700 and the surrounding portion of the transmission case body 010.

Further, in order to obtain good lubrication and cooling effects on the parts at the upper part of the gearbox, an oil filter, namely a fluid medium filtering component 400, can be arranged at a position below the initial oil level and close to the bottom; the oil filter is connected with an oil pipe, namely a circulating pipeline component 500; the upper end of the oil pipe is inserted into the inner hole of the housing, i.e., the transmission body 010.

Wherein, the inner hole is communicated with the oil suction cavity of the oil pump, namely the medium suction area 740 through the shell, namely the oil suction duct in the gearbox body 010; after being pumped by an oil pump, namely a medium circulating pump 700, the oil, namely the fluid medium, enters an oil passage of the gearbox body 010, and then the fluid medium can be distributed to each bearing or part needing lubrication at the upper part.

Specifically, as shown in fig. 3, the position arrangement and transmission structure of the oil pump in the present embodiment are as follows: a chamber, i.e., a first chamber, is hollowed out on the housing, i.e., the transmission case body 010 at one end of the intermediate shaft, i.e., the second transmission shaft 200, and an inner rotor, i.e., a pump first rotor 721, a pump second rotor 722, and an oil pump shaft, i.e., a pump main shaft 710, of the oil pump are arranged; wherein the intermediate shaft is connected with the oil pump shaft through a bushing, namely a shaft body adapting part 210; for a thinner intermediate shaft, the intermediate shaft can also be directly connected with an oil pump shaft; the bushing and the oil pump can be in shape fit, such as spline fit, for transmission; the oil pump shaft and the oil pump rotor can be connected through interference, and the oil pump rotor is positioned in a first cavity formed by the oil pump cover plate and the shell, namely the gearbox body 010.

As shown in fig. 5, after the oil pump rotors 721, 722 are driven by the oil pump shaft 710, an oil suction region, namely 744 medium suction region, and an oil discharge region, namely medium discharge region 755, are provided on the housing according to the rotation direction 707, and the oil suction region is connected with an oil pipe passage, namely the circulation line member 500, and the oil discharge region is connected with the housing oil passage for lubrication.

Wherein, as shown in fig. 6, the oil suction duct, namely the fluid medium channel 600 in the gearbox body and the oil discharge duct, namely the medium discharge channel 777 are seen from the other side of the device; the lower right of the oil drain passage is communicated with the input shaft, namely the bearing cavity of the first transmission shaft 100, namely the first transmission shaft bearing cavity 111, so as to lubricate the input shaft.

Further, the other end of the oil discharging oil passage is communicated with an oil pump inner oil passage formed by a hollow hole in the oil pump shaft of the upper hole of the shell, namely a pump body inner medium passage 770, so as to guide oil into the middle shaft inner hollow hole, namely the second transmission shaft inner hole 220; and then circulates through the bearing portion opposite the intermediate shaft to lubricate it.

In addition, lubrication of the rear bearing of the input shaft can be realized by arranging an opposite shell oil duct; for example, other bearings can be arranged on the corresponding shaft along the circulation channel, so that corresponding lubrication is realized; specifically, an oil hole may be provided in a portion of the needle bearing or the like of the release mechanism, which is to be lubricated, to lubricate the portion.

Meanwhile, an oil discharging area can be arranged on the oil pump cover plate, namely the pump body cover plate part 730 and the oil pump contact part, and the middle shaft bearing is lubricated by arranging an oil spraying hole on the oil discharging area; by selecting a proper oil pump size, the working efficiency of the system can be further optimized, and the complete lubrication of the preset part can be realized by the optimal volume or flow of the fluid medium.

It should be noted that the foregoing examples are merely for clearly illustrating the technical solution of the present utility model, and those skilled in the art will understand that the embodiments of the present utility model are not limited to the foregoing, and that obvious changes, substitutions or alterations can be made based on the foregoing without departing from the scope covered by the technical solution of the present utility model; other embodiments will fall within the scope of the utility model without departing from the inventive concept.

Claims (12)

1. The gearbox structure is characterized by comprising a gearbox body (010), a shafting, a medium circulating pump (700) and a medium circulating channel; the shafting comprises a first transmission shaft (100), a second transmission shaft (200) and a third transmission shaft (300), wherein the first transmission shaft (100), the second transmission shaft (200) and the third transmission shaft (300) are horizontally arranged on an internal bearing of a gearbox body (010), a fluid medium is filled in the gearbox body (010), and the fluid medium flows through the medium circulation channel under the drive of a medium circulation pump (700); the first port (410) of the medium circulation channel is fixedly connected to the inside of the gearbox body (010), and the height of the first port (410) is smaller than the initial liquid level (090) of the fluid medium; the first port (410) is communicated with one end of a fluid medium channel (600) in the gearbox body through a circulating pipeline component (500), and the other end of the medium channel (600) is communicated with the medium circulating pump (700); the main pump shaft (710) of the medium circulating pump (700) is connected with the second transmission shaft (200) through a shape fit; one end of the second transmission shaft (200) which is matched and connected with the medium circulating pump (700) is fixed on the gearbox body (010) through a bearing part.

2. A transmission structure as claimed in claim 1, wherein: the first drive shaft (100) and the second drive shaft (200) each have a greater height than the initial level (090) of the fluid medium than the third drive shaft (300).

3. Gearbox construction according to claim 1 or 2, characterized in that: the medium circulation pump (700) comprises a pump body cover plate component (730), a pump first rotor (721) and a pump second rotor (722); a first chamber of the medium circulation pump (700) is formed by the pump body cover member (730) and the surrounding part of the gearbox body (010); the pump first rotor (721) is fixedly connected to the pump main shaft (710), and the pump first rotor (721) and the pump second rotor (722) are matched to form a medium suction area (744) and a medium discharge area (755).

4. A transmission structure as claimed in claim 3, wherein: the first transmission shaft (100) is a power input shaft, the second transmission shaft (200) is an intermediate shaft, and the third transmission shaft is a power output shaft; -said first drive shaft (100) is torque supplied by an electric machine and/or an engine; the second drive shaft (200) transfers torque of the first drive shaft (100) to the third drive shaft (300); the third drive shaft (300) transmitting torque to a load; the first bearing of the second transmission shaft (200) is fixedly connected inside the first cavity.

5. The transmission structure of claim 4, wherein: also includes a fluid medium filter element (400); the fluid medium filter element (400) is connected to the medium circulation passage first port (410); the fluid medium filter component (400) is immersed below the initial fluid medium level; the fluid medium filtering component (400) is used for removing impurities in the fluid medium; the other end of the circulating pipeline component (500) is communicated with an inner hole of the gearbox body (010); the inner hole of the gearbox body (010) is communicated with a medium suction cavity of the medium circulating pump (700) through a fluid medium channel (600) in the gearbox body; the fluid medium enters a circulation channel of the gearbox body (010) under the pumping of the medium circulation pump (700), and the circulation channel is communicated with a preset part needing lubrication and/or maintaining a temperature index.

6. The transmission structure of claim 5, wherein: an oil drain hole and/or a second medium channel (789) are arranged on the contact surface of the pump body cover plate component (730) and the medium circulating pump (700), and the oil drain hole or the second medium channel (789) lubricates a bearing (799) of the second transmission shaft (200); the manner in which the pump spindle (710) of the medium circulation pump (700) is connected to the second drive shaft (200) includes a spline-fitting connection.

7. A reduction gearbox (922), characterized in that: a gearbox construction comprising the gearbox of any one of claims 1, 2, 4, 5 or 6: the reduction gearbox comprises a gearbox body (010), a shafting, a medium circulating pump (700) and a medium circulating channel; the shafting comprises a first transmission shaft (100), a second transmission shaft (200) and a third transmission shaft (300), wherein the first transmission shaft (100), the second transmission shaft (200) and the third transmission shaft (300) are horizontally arranged on the gearbox body (010), a fluid medium is filled in the gearbox body (010), and the fluid medium flows through the medium circulation channel under the drive of the medium circulation pump (700); the medium circulation channel first port (410) is fixedly connected to the inside of the gearbox body (010), and the height of the first port (410) is smaller than the initial fluid medium level (090); the first port (410) is communicated with one end of a fluid medium channel (600) in the gearbox body through a circulating pipeline component (500), and the other end of the medium channel (600) is communicated with the medium circulating pump (700); the main pump shaft (710) of the medium circulating pump (700) is connected with the second transmission shaft (200) through a shape fit; one end of the second transmission shaft (200) which is matched and connected with the medium circulating pump (700) is fixed on the gearbox body (010) through a bearing part.

8. The reduction gearbox (922) of claim 7, wherein: the first transmission shaft (100), the second transmission shaft (200) and the third transmission shaft (300) are mounted on the gearbox body (010) through bearing components; the first drive shaft (100) and the second drive shaft (200) each have a greater height than the initial level (090) of the fluid medium than the third drive shaft (300).

9. The reduction gearbox (922) according to claim 7 or 8, characterized in that: the medium circulation pump (700) comprises a pump body cover plate component (730), a pump first rotor (721) and a pump second rotor (722); a first chamber of the medium circulation pump (700) is formed by the pump body cover member (730) and the surrounding part of the gearbox body (010); the pump first rotor (721) is fixedly connected to the pump main shaft (710), and the pump first rotor (721) and the second rotor (722) are matched to form a medium suction area (744) and a medium discharge area (755).

10. The reduction gearbox (922) according to claim 9, wherein: the first transmission shaft (100) is a power input shaft, the second transmission shaft (200) is an intermediate shaft, and the third transmission shaft is a power output shaft; -said first drive shaft (100) providing torque with an electric machine or engine; the second drive shaft (200) transfers torque of the first drive shaft (100) to the third drive shaft (300); the third drive shaft (300) transmitting torque to a load of the gearbox; the first bearing of the second transmission shaft (200) is fixedly connected with the first chamber.

11. An electric drive axle (911), characterized by: comprising a reduction gearbox (922) according to claim 7, 8 or 9; wherein: the first transmission shaft (100) is driven by a motor (933); the gearbox structure and/or the reduction gearbox (922) adopts a vertical arrangement structure, and the first transmission shaft (100), the second transmission shaft (200) and the third transmission shaft (300) of the gearbox structure and/or the reduction gearbox (922) are/is arranged on the gearbox body (010) and/or the reduction gearbox (922) body through bearing components; -the first drive shaft (100) and the second drive shaft (200) each have a height difference from an initial level (090) of the fluid medium that is greater than a height difference of the third drive shaft (300) from an initial level (090) of the fluid medium; the first transmission shaft (100) is a power input shaft, the second transmission shaft (200) is an intermediate shaft, and the third transmission shaft is a power output shaft; -said first drive shaft (100) is provided with torque by an electric machine or an engine; the second drive shaft (200) transfers torque of the first drive shaft (100) to the third drive shaft (300); the third drive shaft (300) transmitting torque to a load of the gearbox; the first bearing of the second transmission shaft (200) is fixedly connected with the first chamber.

12. A vehicle (900), characterized by: comprising a reduction gearbox (922) according to claim 9 and/or an electric drive axle (911) according to claim 11; the electric drive axle (911) is vertically arranged in the cabin, a first transmission shaft (100) of the electric drive axle (911) is a power input shaft, a second transmission shaft (200) is an intermediate shaft, a third transmission shaft (300) is a power output shaft or a differential mechanism output shaft, the first transmission shaft (100) and the second transmission shaft (200) are positioned in a direction away from the static storage liquid level of a fluid medium or higher than the third transmission shaft (300), and the fluid medium is used for circulating flow in the gearbox; -said first drive shaft (100) is torque supplied by an electric machine and/or an engine; the second drive shaft (200) transfers torque of the first drive shaft (100) to the third drive shaft (300); the third drive shaft (300) transmitting torque to a load; the connection of the load to the gearbox includes connection using a differential; the first bearing of the second transmission shaft (200) is fixedly connected inside the first chamber; the first chamber is a chamber formed by a pump body cover plate component (730) of the medium circulating pump (700) and a surrounding part of the gearbox body (010).