CN116658604A - Gearbox and lubricating heat dissipation oil circuit thereof - Google Patents

Abstract

The invention discloses a gearbox and a lubricating and heat-dissipating oil way thereof.A part of structure of a gear in the gearbox is immersed in oil stored in the gearbox, the oil in the gearbox is stirred and thrown away when the gear rotates, the oil thrown away by the gear is collected in an oil collecting tank, the oil in the oil collecting tank flows through a first oil pipe and a throttle valve and then enters a cavity of a transmission shaft, part of oil flowing through the throttle valve is discharged from a first oil throwing hole to lubricate and dissipate heat of a bearing, and the oil in the cavity of the transmission shaft is lubricated and dissipated for a member arranged on the transmission shaft from a second oil throwing Kong Feichu transmission shaft. The arrangement can not influence the volume of the gearbox, can adapt to the gearboxes with various specifications and structures, and improves the heat dissipation capacity of the gearboxes.

Description

Gearbox and lubricating heat dissipation oil circuit thereof

Technical Field

The invention relates to the field of transmission, in particular to a gearbox and a lubricating heat dissipation oil way thereof.

Background

The hydraulic torque converter is used for realizing low-speed heavy-duty work and high-speed running, but due to the inherent characteristics of the torque converter, the hydraulic torque converter can generate energy loss in the power transmission process and generate a large amount of heat, so that a cooling device is required to be added for heat dissipation in the whole vehicle design, and the hydraulic torque converter has low working efficiency and high energy loss.

The patent document with publication number CN103727218A discloses a heat dissipation type gearbox, the gearbox comprises a gearbox body, a plurality of heat dissipation fins are arranged on the outer side surface of the gearbox body, air flow holes are formed between every two heat dissipation fins, a plurality of heat dissipation strips are arranged on the inner side surface of the gearbox body, and a heat conductor is connected between every two heat dissipation strips.

In the prior art, in order to enable the gearbox to have a better heat dissipation effect, namely, a fin special for heat dissipation is additionally arranged outside the box body, the whole volume of the existing gearbox can be directly increased, and the frame structure of the whole gearbox needs to be adjusted when the whole gearbox is installed.

Disclosure of Invention

In order to solve the problem that a radiating fin is additionally arranged outside a gearbox body in the prior art to cause the gearbox body to be enlarged, the invention aims to provide the gearbox and a lubricating radiating oil way thereof, which can adapt to gearboxes with various specifications and structures and improve the radiating capacity of the gearbox without influencing the volume of the gearbox.

In order to achieve the above purpose, the present invention adopts the following technical scheme: the transmission comprises a box body and a plurality of transmission shafts, wherein the transmission shafts are arranged on the box body through bearings, gears are arranged on the transmission shafts, a cavity is formed in at least one transmission shaft, and a plurality of second oil throwing holes communicated with the cavity are formed in the transmission shaft; the box body is internally provided with an oil collecting tank which is positioned above the transmission shaft with the cavity; the oil collecting groove is communicated with the cavity of the transmission shaft through a first oil pipe, the first oil pipe is communicated with the cavity of the transmission shaft through a throttle valve, the first oil pipe is positioned at the outer side of the box body, a first oil throwing hole is formed in the throttle valve, and the first oil throwing hole is positioned between the bearing and the inner wall of the box body; the oil is stored in the box, part of the structure of the gear is immersed in the oil stored in the box, the oil in the box is stirred and thrown away when the gear rotates, the oil thrown away by the gear is collected in the oil collecting tank, the oil in the oil collecting tank flows through the first oil pipe and the throttle valve and then enters the cavity of the transmission shaft, part of the oil flowing through the throttle valve is discharged from the first oil throwing hole to lubricate and dissipate heat of the bearing, and the oil in the cavity of the transmission shaft is lubricated and dissipates heat of a component arranged on the transmission shaft from the second oil throwing Kong Feichu transmission shaft.

Preferably, the throttle valve is arranged at one end of the transmission shaft, and the throttle valve supplies oil to the bearing adjacent to the throttle valve; the gearbox further comprises a second oil pipe, the box body and the oil collecting groove are communicated through the second oil pipe, and the second oil pipe supplies oil for a bearing arranged at the other end of the transmission shaft.

Preferably, the cavity of the transmission shaft extends radially and penetrates through the transmission shaft, and the two ends of the transmission shaft are respectively provided with an oil storage plug for plugging the cavity.

Preferably, an oil collecting plate is arranged in the box body, and the upper surface of the oil collecting plate is recessed downwards to form an oil collecting groove.

Preferably, the tank body is internally provided with an inclined oil guide plate, the top of the oil guide plate is fixed on the inner wall of the tank body, and the bottom of the oil guide plate extends to the upper part of the oil collecting groove.

Preferably, there is at least one oil pan.

Preferably, the oil in the oil sump flows into the first oil pipe by its own weight.

A gearbox is provided with the lubricating heat dissipation oil way.

Preferably, the box body comprises a left box body and a right box body, the left box body is buckled with the right box body and is fixedly connected with the right box body, and two ends of the transmission shaft are respectively rotatably arranged on the left box body and the right box body.

Preferably, the plurality of transmission shafts includes an input shaft, a clutch shaft, and an output shaft, and power is input via the input shaft and/or the clutch shaft.

The technical scheme of the invention has the beneficial effects that: in the structure, the oil liquid is cooled once in the process of splashing to the inner wall of the box body, and then the oil liquid attached to the inner wall of the box body is cooled twice in the process of gathering to the oil collecting groove, and the oil liquid in the oil collecting groove moves to the outside of the box body through the oil pipe to realize three times of cooling, so that the oil liquid returned to the box body is sufficiently cooled; the oil liquid subjected to multiple heat dissipation firstly enters the transmission shaft to cool the transmission shaft, then the oil liquid flying out of the transmission shaft can be attached to parts such as a bearing and a clutch arranged on the transmission shaft, and then the bearing and the clutch are cooled, and then the oil liquid separated from the bearing and the clutch returns to an oil liquid pool in the box body to be directly cooled. Furthermore, through the mode, oil can be sufficiently cooled, and the clutch and the bearing in the gearbox can be sufficiently lubricated and cooled, so that the cooling rate of the gearbox is greatly improved.

Drawings

FIG. 1 is a schematic diagram of a transmission;

FIG. 2 is a schematic diagram of a second gearbox configuration;

FIG. 3 is a schematic diagram III of a transmission;

FIG. 4 is a schematic structural view of a transmission fourth;

FIG. 5 is a schematic diagram of the connection structure of the tank and the oil pipe;

FIG. 6 is a schematic view of the mounting structure of an electro-hydraulic operated valve.

Reference numerals: 1. a first input shaft; 2. a first input end cap; 3. a second input shaft; 4. a second input end cap; 5. a second input gear; 6. an output shaft; 7. an output gear; 8. a first output flange; 9. a second output flange; 10. a parking brake; 11. a right box body; 12. a left box body; 13. an oil baffle plate; 14. a pressure switch; 15. an electro-hydraulic operated valve; 16. a clutch shaft; 17. a transition gear; 18. an outer friction plate; 19. an intermediate gear; 20. a spline seat; 21. an inner friction plate; 22. a return spring; 23. a baffle; 24. a pressure bearing plate; 25. a clutch end cap; 26. a cylindrical pin; 27. a piston; 28. a return spring; 29. a retainer ring seat; 30. a retainer ring; 31. a spacer ring; 32. a ninth bearing; 33. a belleville spring; 34. an oil sump; 35. a first oil pipe; 36. an oil storage plug; 37. a heat sink; 38. a second oil pipe; 39. a fifth bearing; 40. a sixth bearing; 41. a tenth bearing; 42. a heat dissipation rib; 43. a throttle valve.

Description of the embodiments

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more, unless otherwise clearly defined.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

Examples

The lubrication heat dissipation oil way of the gearbox is shown in fig. 1, 2 and 5, the gearbox comprises a box body and a plurality of transmission shafts, the transmission shafts are arranged on the box body through bearings, gears are arranged on the transmission shafts, a cavity is formed in at least one transmission shaft, a plurality of second oil throwing holes communicated with the cavity are formed in the transmission shaft, and the second oil throwing holes are radially arranged; the box body is internally provided with an oil collecting groove 34, and the oil collecting groove 34 is positioned above the transmission shaft with the cavity; the oil collecting groove 34 is communicated with the cavity of the transmission shaft through a first oil pipe 35, the first oil pipe 35 is communicated with the cavity of the transmission shaft through a throttle valve 43, the first oil pipe 35 is positioned on the outer side of the box body, a first oil throwing hole is formed in the throttle valve 43, and the first oil throwing hole is positioned between the bearing and the inner wall of the box body; the oil is stored in the box, part of the structure of the gear is immersed in the oil stored in the box, the oil in the box is stirred and thrown away when the gear rotates, the oil thrown away by the gear is collected in the oil collecting groove 34, the oil in the oil collecting groove 34 flows through the first oil pipe 35 and the throttle valve 43 and enters the cavity of the transmission shaft, when the transmission shaft rotates, the oil in the cavity of the transmission shaft is thrown away from the second oil Kong Feichu to lubricate and dissipate heat for components arranged on the transmission shaft, and part of the oil flowing through the throttle valve 43 is discharged from the first oil throwing hole to lubricate and dissipate heat for a bearing connecting the transmission shaft and the box.

In the structure, the primary cooling is realized in the process of splashing the oil to the inner wall of the tank body, the secondary cooling is realized in the process of collecting the oil attached to the inner wall of the tank body to the oil collecting tank 34, and the oil in the oil collecting tank 34 moves to the outside of the tank body through the oil pipe to realize the tertiary cooling, so that the oil returned to the tank body is sufficiently cooled; the oil liquid subjected to multiple heat dissipation firstly enters the transmission shaft to cool the transmission shaft, then the oil liquid flying out of the transmission shaft can be attached to parts such as a bearing and a clutch arranged on the transmission shaft, and then the bearing and the clutch are cooled, and then the oil liquid separated from the bearing and the clutch returns to an oil liquid pool in the box body to be directly cooled. Furthermore, through the mode, oil can be sufficiently cooled, and the clutch and the bearing in the gearbox can be sufficiently lubricated and cooled, so that the cooling rate of the gearbox is greatly improved.

In this embodiment, the throttle valve 43 is installed at one end of the transmission shaft, and the throttle valve 43 supplies oil to the bearing adjacent thereto; the gearbox further comprises a second oil pipe 38, the box body and the oil collecting groove 34 are communicated through the second oil pipe 38, and the second oil pipe 38 supplies oil for a bearing arranged at the other end of the transmission shaft. By the arrangement, the two bearings with the largest stress on the transmission shaft can be guaranteed to be lubricated and radiated by enough oil, and the running stability and the running sustainability of the gearbox are improved.

Further preferably, for easy installation, the cavity of the transmission shaft extends radially and penetrates through the transmission shaft, two ends of the transmission shaft are respectively provided with an oil storage plug 36 for plugging the cavity, and one end of the throttle valve 43 is communicated with the cavity of the transmission shaft through the oil storage plug 36. By the arrangement, the manufacturing and assembling difficulty of the transmission shaft can be reduced, lubricating oil entering the clutch is stored, and the bearing and the friction plate are fully lubricated.

In this embodiment, in order to further improve the heat dissipation effect of the gearbox, as shown in fig. 3 and fig. 4, the outer surface of the box body is protruded with heat dissipation ribs 42 that are criss-cross. So set up, increase the area of contact of box and air, and then further improve the radiating efficiency of gearbox.

In this embodiment, in order to further improve the heat dissipation efficiency of the gearbox, as shown in fig. 1 and 4, the cooling fins 37 are mounted on the box. So configured, the gearbox housing is further cooled by the cooling fins 37. Further preferably, the heat sink 37 is provided in plurality. By this arrangement, the heat dissipation effect of the gearbox is further improved, and it is further preferable that the heat dissipation fin 37 is close to the position where the transmission shaft is located. The device is arranged in such a way, and the heat dissipation of the easily-heated part is performed in time in a targeted manner, so that the stability of the transmission process of the gearbox is maintained.

In this embodiment, as shown in fig. 1 and fig. 2, an oil baffle 13 is fixedly installed in the box, a part of the oil baffle 13 is immersed in oil in the box, the oil baffle 13 is located at a side surface of a gear, and the oil baffle 13 is parallel to the gear on the transmission shaft. By the arrangement, the baffle is arranged, so that the oil stirring quantity during gear rotation is reduced, and the heat generated by oil flowing is reduced.

In this embodiment, as shown in fig. 5, an oil collecting plate 44 is disposed in the tank, the oil collecting plate 44 is located above the hollow transmission shaft, and the upper surface of the oil collecting plate 44 is recessed downward to form the oil collecting tank 34, so that oil in the oil collecting tank 34 can enter the cavity of the transmission shaft through the oil pipe by gravity, and self circulation is achieved. Further, an inclined oil guide plate 45 is arranged in the tank body, the top of the oil guide plate 45 is fixed on the inner wall of the tank body, and the bottom of the oil guide plate 45 extends to the upper side of the oil collecting groove 34. Further, at least one oil guide plate 45 is provided.

A gearbox applying the scheme, the box body and a plurality of transmission shafts are shown in fig. 1 to 4, the plurality of transmission shafts comprise an input shaft, a clutch shaft 16 and an output shaft 6, the input shaft is in transmission connection with the clutch shaft 16 through a clutch, and the clutch shaft 16 is in meshed transmission with the output shaft 6 through a gear.

As shown in fig. 1 and 2, the input shaft includes a first input shaft 1 and a second input shaft 3, and the first input shaft 1, the second input shaft 3, the output shaft 6 and the clutch shaft 16 are all rotated on the case; as shown in fig. 1 and 2, an intermediate gear 19 is fixedly mounted on the clutch shaft 16, a second input gear 5 is fixedly mounted on the second input shaft 3, an output gear 7 is fixedly mounted on the output shaft 6, the intermediate gear 19 and the second input gear 5 are both meshed with the output gear 7, a first input gear is arranged on the first input shaft 1 and is in meshed transmission with a transition gear 17 of the clutch, and the transition gear 17 is rotatably mounted on the clutch shaft 16. The structure adopts two inputs, and when the machine carries out heavy load work, the two inputs are adopted to drive the gearbox to integrally operate, so that stepless speed change and low-speed heavy load work of the machine are realized; when the machine is in high-speed light load, one of the input shafts inputs power, so that stepless speed change and high-speed walking of the machine are realized; the forward and backward movement of the loader is realized by controlling the forward and backward rotation of the two input shafts. Further, the first input shaft 1 and the first input gear are fixedly connected or integrally formed.

In this embodiment, the first input shaft 1 is connected to a first hydraulic motor and the second input shaft 3 is connected to a second hydraulic motor. By the arrangement, the power of the first hydraulic motor or the power of the second hydraulic motor can be independently output by the gearbox according to different disclosures, and the power of the two hydraulic motors can be integrated and then output by the gearbox. Further preferably, the power of the first hydraulic motor is greater than the power of the second hydraulic motor. The power of the two power sources is different, so that the gearbox can flexibly select a power output mode according to working conditions.

As shown in fig. 1 and 2, in this embodiment, the box body includes a left box body 12 and a right box body 11, concave cavities are respectively provided on the left box body 12 and the right box body 11, the left box body 12 and the right box body 11 are fixedly connected, and a cavity portion of the left box body 12 and a cavity portion of the right box body 11 are buckled to form an inner cavity of the box body. The two ends of the first input shaft 1, the two ends of the second input shaft 3, the two ends of the output shaft 6 and the two ends of the clutch shaft 16 are respectively mounted on the left case 12 and the right case 11 through different bearings.

Further preferably, one end of the first input shaft 1 is connected with the left box body 12 through a first bearing, the other end of the first input shaft 1 is connected with the right box body 11 through a second bearing, a first input end cover 2 is fixed on the right box body 11, and the first input end cover 2 is abutted against the outer ring of the second bearing to axially fix the first input shaft 1. The first hydraulic motor is mounted on the first input end cap 2.

Further preferably, one end of the second input shaft 3 is connected with the left box body 12 through a third bearing, the other end of the second input shaft 3 is connected with the right box body 11 through a fourth bearing, a second input end cover 4 is fixed on the right box body 11, and the second input end cover 4 is abutted against the outer ring of the fourth bearing to axially fix the second input shaft 3. The second hydraulic motor is mounted on the second input end cap 4.

Further preferably, one end of the clutch shaft 16 is connected to the left housing 12 through a fifth bearing 39, and the other end of the clutch shaft 16 is connected to the right housing 11 through a sixth bearing 40. One end of the output shaft 6 is connected to the left case 12 through a seventh bearing, and the other end of the output shaft 6 is connected to the right case 11 through an eighth bearing.

In this embodiment, as shown in fig. 1, both ends of the output shaft 6 extend from the case. Thus, both sides of the gearbox can be driven. Further preferably, a parking brake 10 is fixedly installed on the box body of the gearbox, and the parking brake 10 is connected with one end of the output shaft 6. With this arrangement, when the hydraulic motor power is not input, the parking brake is performed by the parking brake 10.

In this embodiment, as shown in fig. 1, the power input and the power output of the gearbox are both performed on the same side of the box, specifically, the parking brake 10 is mounted on the left box 12, the first input end cover 2 and the second input end cover 4 are both mounted on the right box 11, and the right end of the output shaft extends from the right box. By the arrangement, the space required by the gearbox can be smaller, and the arrangement of a machine transmission chain is facilitated.

In order to enable the gearbox to have enough heat dissipation capacity, in the embodiment, a transmission shaft for outputting power in the gearbox dissipates heat through a heat dissipation plate, a transmission shaft for coupling power in the gearbox dissipates heat through oil in oil pipe backflow, and a power output part of the gearbox dissipates heat through oil stored in the gearbox. Specifically, as shown in fig. 1 to 5, the first input shaft 1, the second input shaft 3, the output shaft 6 and the clutch shaft 16 are located at different heights, the first input shaft 1 and the second input shaft 3 are located above the output shaft 6, a part of the structure of the intermediate gear 19 and a part of the structure of the output gear 7 are immersed in oil stored in the tank, the cooling fin 37 is close to the first input shaft 1 and the second input shaft 3, the clutch shaft 16 is provided with a cavity, and the first oil pipe 35 and the second oil pipe 38 supply oil to two ends of the clutch shaft 16 respectively.

In this embodiment, as shown in fig. 2, the clutch includes a transition gear 17, a plurality of outer friction plates 18, a spline housing 20, a plurality of inner friction plates 21, a return spring 22, a baffle plate 23, a bearing plate 24, a clutch end cover 25, a piston 27, and a return spring 28; the transition gear 17 is rotatably mounted on the clutch shaft 16, the plurality of outer friction plates 18 are mounted on the transition gear 17, the spline seat 20 is slidably mounted on the clutch shaft 16, the plurality of inner friction plates 21 are mounted on the spline seat 20, the baffle plate 23 is fixedly connected with the clutch shaft 16, the bearing plate 24 is slidably connected with the clutch shaft 16, the friction plates are positioned between the baffle plate 23 and the bearing plate 24, the return spring 22 is arranged between the spline seat 20 and the bearing plate 24, the return spring 22 endows the bearing plate 24 with a trend of keeping away from the friction plates, the clutch end cover 25 is fixedly connected with the left box 12, the inner wall of the box is provided with an annular connecting part in a protruding mode, the clutch end cover 25 is fixedly connected with the connecting part, the piston 27 is positioned on the inner side of the connecting part, the connecting part and the clutch end cover 25 are in sliding fit with the piston 27, the piston 27 is rotatably mounted on the bearing plate 24 through a tenth bearing 41, the connecting part, the clutch end cover 25 and the piston 27 are enclosed into an oil cavity 46, the connecting part is provided with an oil inlet hole communicated with the oil cavity 46, the return spring 28 is arranged between the piston 27 and the inner wall of the box, and the reset spring 28 endows the piston 27 with a large trend of reducing the oil cavity 46. The arrangement is such that the various components of the clutch are disposed within the transmission housing. The tenth bearing 41 is a tapered roller bearing, the inner ring of the tenth bearing 41 is tightly fitted with the bearing plate 24, and the outer ring of the tenth bearing 41 is tightly fitted with the piston 27. Further, the return spring 28 is a belleville spring, the return spring 28 is sleeved on the piston 27, a retainer ring seat 29 and a retainer ring 30 are further sleeved on the piston, the retainer ring seat 29 is located between the return spring 28 and the retainer ring 30, and two ends of the retainer ring seat 29 can respectively abut against the return spring 28 and the retainer ring 30.

Further preferably, as shown in fig. 1 and 2, the fifth bearing 39 and the sixth bearing 40 on the clutch shaft 16 are tapered roller bearings, two tapered roller bearings are disposed opposite to each other, inner rings of the two tapered roller bearings are abutted against the clutch shaft 16, an outer ring of one tapered roller bearing is abutted against an inner wall of the housing, an outer ring of the other tapered roller bearing is abutted against the inner wall of the housing through a disc spring 33, and the disc spring 33 is axially disposed with the clutch shaft 16. By the arrangement, the gap between the clutch shaft 16 and the box body can be automatically adjusted by the force generated by the disc spring 33, and the gap between each bearing arranged on the clutch shaft 16 is adjusted, so that the inner ring and the outer ring of the bearing are always kept in contact, and the separation and the damage of the inner ring and the outer ring of the bearing are avoided.

Further, a cylindrical pin 26 is fixed on the clutch end cover 25, and a positioning hole matched with the cylindrical pin 26 is formed in the piston 27. The cylindrical pin 26 is inserted into the positioning hole and is in sliding fit with the positioning hole. So arranged, the direction of movement of the piston 27 can be ensured. Further, the plurality of cylindrical pins 26 are provided, the plurality of cylindrical pins 26 are arranged around the clutch shaft 16, and the plurality of positioning holes are provided, and the plurality of positioning holes and the plurality of cylindrical pins 26 are in one-to-one correspondence.

Further preferably, the intermediate gear 19 is rotatably mounted on the clutch shaft 16 through two ninth bearings 32, and a part of the second oil slinger on the clutch shaft 16 is located in the middle of the two ninth bearings 32; a portion of the second oil slinger holes on the clutch shaft 16 are located inside the clutch, a portion of the second oil slinger holes are located between the spline housing 20 and the baffle 23, and a portion of the second oil slinger holes are located between the spline housing 20 and the pressure plate 24.

Further preferably, the gearbox further comprises a pressure switch for detecting the pressure value in the clutch, and the pressure switch determines whether the first input shaft 1 inputs power or not by detecting whether the oil pressure in the oil cavity 46 of the clutch is lower than a specified value, so that slipping and generated heat of the clutch are reduced, and the clutch is protected.

In this embodiment, as shown in fig. 5, the oil collecting plate 44 is located above the clutch shaft 16, the oil collecting plate 44 includes a first oil collecting portion and a second oil collecting portion, the first oil collecting portion is fixed on the left case 12, the second oil collecting portion is fixed on the right case 11, and after the left case 12 and the right case 11 are fixedly connected, the first oil collecting portion and the second oil collecting portion are abutted. Further, the oil guiding plate 45 includes a first oil guiding portion and a second oil guiding portion, the first oil guiding portion is fixed on the left case 12, the second oil guiding portion is fixed on the right case 11, and after the left case 12 and the right case 11 are fixedly connected, the first oil guiding portion and the second oil guiding portion are abutted.

In this embodiment, as shown in fig. 6, the gearbox further includes an operating component, where the operating component includes an electrohydraulic operating valve 15, the electrohydraulic operating valve 15 is installed in the box, and the electrohydraulic operating valve 15 is connected to a hydraulic oil circuit system to control hydraulic oil to enter and exit the oil cavity 46 of the clutch. Furthermore, the hydraulic oil way system is supplied with oil by an external oil pump for working.

The specific control is as follows: when the gearbox outputs coupling power, oil is not filled in a clutch oil cavity 46, an inner friction plate 21 and an outer friction plate 18 of the clutch are connected under the action of a return spring 22 and a return spring 28, the first hydraulic motor is connected with a first input shaft 11, the hydraulic motor drives the first input shaft 1 to rotate, the first input shaft 1 is meshed with a transition gear 17 of the clutch through a first input gear, the transition gear 17 drives a spline seat 20 to rotate through the inner friction plate 21 and the outer friction, the spline seat 20 drives a clutch shaft 16 to rotate, and the clutch shaft 16 rotates through an intermediate gear 19; the second hydraulic motor drives the second input shaft 3 to rotate, the second input shaft 3 drives the second input gear 5 to rotate, the second input gear 5 and the intermediate gear 19 drive the output gear 7 to rotate together, the output gear 7 drives the output shaft 6 to rotate, and the second output flange outputs power and drives the loader to work at a low speed and in a heavy load.

When the gearbox outputs single power, the second hydraulic motor is connected with the second input shaft 3, the second input gear 5 fixedly connected with the second input shaft 3 is meshed with the output gear 7, the operating part injects oil into the oil cavity 46 of the clutch through the electrohydraulic operating valve, so that the return spring 22 and the hydraulic oil drive piston 27 move and compress the return spring 28, the inner friction plate 21 and the outer friction plate 18 of the clutch are separated, the clutch is positioned in a disengaging pile body, the power of the first hydraulic motor cannot be transmitted to the clutch shaft 16, the power of the second hydraulic motor is transmitted to the output shaft 6, and the power of the second hydraulic motor is output through the first output flange and the second output flange on the output shaft 6 and drives the loader to walk at a high speed.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations may be made in the above embodiments by those skilled in the art without departing from the spirit and principles of the invention.

Claims (10)

1. A lubrication heat dissipation oil circuit of a gearbox is characterized in that: the gearbox comprises a box body and a plurality of transmission shafts, the transmission shafts are arranged on the box body through bearings, gears are arranged on the transmission shafts, a cavity is formed in at least one transmission shaft, and a plurality of second oil throwing holes communicated with the cavity are formed in the transmission shaft;

an oil collecting groove (34) is arranged in the box body, and the oil collecting groove (34) is positioned above the transmission shaft with the cavity; the oil collecting tank (34) is communicated with the cavity of the transmission shaft through a first oil pipe (35), the first oil pipe (35) is communicated with the cavity of the transmission shaft through a throttle valve (43), the first oil pipe (35) is positioned at the outer side of the box body, a first oil throwing hole is formed in the throttle valve (43), and the first oil throwing hole is positioned between the bearing and the inner wall of the box body;

the oil is stored in the box, part of the structure of the gear is immersed in the oil stored in the box, the oil in the box is stirred and thrown away when the gear rotates, the oil thrown away by the gear is collected in the oil collecting groove (34), the oil in the oil collecting groove (34) flows through the first oil pipe (35) and the throttle valve (43) and then enters the cavity of the transmission shaft, part of the oil flowing through the throttle valve (43) is discharged from the first oil throwing hole to lubricate and dissipate heat of the bearing, and the oil in the cavity of the transmission shaft is lubricated and dissipates heat of a component arranged on the transmission shaft from the second oil throwing Kong Feichu transmission shaft.

2. The lubrication heat dissipation oil passage of a transmission according to claim 1, wherein: the throttle valve (43) is arranged at one end of the transmission shaft, and the throttle valve (43) supplies oil to a bearing adjacent to the throttle valve; the gearbox further comprises a second oil pipe (38), the box body and the oil collecting groove (34) are communicated through the second oil pipe (38), and the second oil pipe (38) supplies oil for a bearing arranged at the other end of the transmission shaft.

3. The lubrication heat dissipation oil path of a transmission according to claim 1, wherein: the cavity of the transmission shaft radially extends and penetrates through the transmission shaft, and oil storage plugs (36) for plugging the cavity are respectively arranged at two ends of the transmission shaft.

4. The lubrication heat dissipation oil passage of a transmission according to claim 1, wherein: an oil collecting plate (44) is arranged in the box body, and the upper surface of the oil collecting plate (44) is recessed downwards to form an oil collecting groove (34).

5. The lubrication heat dissipation oil passage of a transmission according to claim 1, wherein: the inside of the box body is provided with an inclined oil guide plate (45), the top of the oil guide plate (45) is fixed on the inner wall of the box body, and the bottom of the oil guide plate (45) extends to the upper part of the oil collecting groove (34).

6. The lubrication and heat dissipation oil path of a transmission according to claim 5, wherein: at least one oil guide plate (45) is arranged.

7. The lubrication heat dissipation oil passage of a transmission according to claim 1, wherein: the oil in the oil collecting groove (34) flows into the first oil pipe (35) through the dead weight.

8. A gearbox, characterized in that: a lubrication and heat dissipation oil path for a gearbox according to any one of claims 1-7.

9. The lubrication and heat dissipation oil path of a transmission according to claim 8, wherein: the box comprises a left box body (12) and a right box body (11), wherein the left box body (12) is buckled with the right box body (11) and is fixedly connected with the right box body, and two ends of the transmission shaft are respectively rotatably arranged on the left box body (12) and the right box body (11).

10. The lubrication and heat dissipation oil path of a transmission according to claim 8, wherein: the plurality of transmission shafts includes an input shaft, a clutch shaft (16), and an output shaft (6), and power is input via the input shaft and/or the clutch shaft (16).