CN113357355A

CN113357355A - Gear box

Info

Publication number: CN113357355A
Application number: CN202110914748.2A
Authority: CN
Inventors: 唐德和
Original assignee: Xuzhou Dingde Technology Manufacturing Co ltd
Current assignee: Xuzhou Dingde Technology Manufacturing Co ltd
Priority date: 2021-08-10
Filing date: 2021-08-10
Publication date: 2021-09-07

Abstract

The application discloses a gearbox, which comprises a rotating impeller, an oil pumping assembly and a blowing assembly; the rotating impeller is rotatably and fixedly connected to the gearbox shell and rotates under the blowing of the blowing assembly, and the blowing assembly is positioned on the outer surface of the gearbox shell; the rotating impeller comprises an impeller main body, a central revolving body, a heat dissipation oil pipe and an oil inlet pipe; the impeller main body is fixed on the top of the central revolving body and used for supporting and positioning the heat dissipation oil pipe; the central revolving body is used for oil transportation and transporting oil in the oil inlet pipe and the oil outlet pipe to the heat dissipation oil pipe for heat dissipation; the heat dissipation oil pipe is densely distributed on the blades of the impeller main body through multiple bending and is communicated with the inner space of the gearbox through the central revolving body; the oil inlet pipe and the oil outlet pipe are positioned on the shell of the transmission case and play a role of an oil passage; the oil pumping assembly plays a role in pumping oil in the gearbox shell to a heat dissipation oil pipe for heat dissipation; the technical effect of efficient heat dissipation of gear oil in the gearbox is achieved.

Description

Gear box

Technical Field

The invention relates to the technical field of electric vehicle power devices, in particular to a gearbox.

Background

The gearbox is a device for changing the rotating speed ratio and the moving direction, and is used for changing the torque, the rotating speed and the moving direction transmitted from the driving shaft to the driven shaft according to different working conditions; geared gearboxes generally consist of a housing and a number of gear pairs.

In the transmission process of the gearbox, a gear set in the gearbox generates high temperature, if heat is not dissipated in time, an oil film of lubricating oil (gear oil) is easily damaged, the contact tooth surface generates higher instantaneous temperature, and meanwhile, metal at the contact part of the tooth surface is locally bonded together under higher pressure (so that the gears are bonded).

In the prior art, in order to solve the problems, a gear oil cooling system is generally arranged on a gearbox, and the temperature of a speed change mechanism in the gearbox is indirectly reduced in a gear oil cooling mode, so that the damage of the gearbox is avoided; however, most of the conventional lubricating oil cooling systems are designed to guide gear oil out of the casing of the transmission, and then the gear oil is cooled by means of natural heat dissipation (heat conduction) by means of an oil pipe or a heat dissipation block outside the transmission, so that the cooling effect is not ideal.

Disclosure of Invention

The embodiment of the application provides a gearbox, has solved the unsatisfactory technical problem of gearbox radiating effect among the prior art, has realized the high-efficient radiating technical effect of gear oil in the gearbox.

The embodiment of the application provides a gearbox, which comprises a gearbox shell and a speed change mechanism, wherein the speed change mechanism comprises a gear shaft, a rotating impeller, an oil pumping assembly and a blowing assembly;

the rotating impeller is rotatably and fixedly connected to the gearbox shell and rotates under the blowing of the blowing assembly, and the blowing assembly is positioned on the outer surface of the gearbox shell;

the rotating impeller comprises an impeller main body, a central revolving body, a heat dissipation oil pipe and an oil inlet pipe;

the impeller main body is fixed at the top of the central revolving body and used for supporting and positioning the heat dissipation oil pipe;

the central revolving body is used for oil transportation and transports the oil in the oil inlet pipe and the oil outlet pipe to the heat dissipation oil pipe for heat dissipation;

the heat dissipation oil pipes are bent for multiple times and densely distributed on the blades of the impeller main body and tightly attached to the impeller main body, and the number of the heat dissipation oil pipes is one or more and is communicated with the inner space of the gearbox through the central revolving body;

the oil inlet pipe is positioned on the gearbox shell, and the oil pumping assembly is communicated with the central revolving body to play a role of an oil passage;

the oil pumping assembly plays a role in pumping oil in the transmission case to the heat dissipation oil pipe for heat dissipation.

Further, the central revolving body is of a cylindrical structure and comprises a fixed base, a revolving body, an oil passage and an oil inlet and an oil outlet;

the fixed base is cylindrical, is fixed on the outer surface of the gearbox shell and is used for positioning the rotating body;

an oil inlet and outlet is positioned on the fixed base and is communicated with the oil inlet and outlet pipe;

the rotating body is also cylindrical and can be fixedly connected to the fixed base in a rotating way around the axis direction of the rotating body;

the oil passage is positioned inside the fixed base and the rotating body and used for conveying oil.

Furthermore, the oil pumping assembly is positioned on the transmission shell and comprises an oil pipeline, a pumping assembly shell, a piston and a piston driving assembly;

the oil inlet and outlet pipe comprises an oil inlet pipe and an oil outlet pipe;

the oil delivery pipes are positioned on the inner wall of the gearbox shell, the number of the oil delivery pipes is two, and oil inlet and outlet holes for oil inlet and outlet are densely distributed on the oil delivery pipes;

the pumping assembly shell is in a hollow cylindrical shape, an oil inlet and an oil outlet are positioned on the pumping assembly shell, and one-way valves are positioned on the oil inlet and the oil outlet;

the oil inlet is connected with one of the oil pipelines, and the oil outlet is communicated with an oil inlet pipe of the oil inlet pipe and the oil outlet pipe;

the oil outlet pipe is connected with the other oil conveying pipe;

the piston slides under the driving of the piston driving assembly so as to pump oil.

Further, the oil pumping assembly further comprises a tension spring;

the piston driving assembly comprises a pull rope, a cam, a force guide rod, a rod head wheel, a force guide rod accommodating pipe, an accommodating pipe positioning assembly and an in-pipe tension spring;

the tension spring is positioned in the pumping assembly shell, one end of the tension spring is fixed on the inner wall of the pumping assembly shell, the other end of the tension spring is fixed on the piston, and the spatial position of the tension spring is positioned at one end of the piston, which is far away from the piston driving assembly;

the pull rope penetrates through the pumping assembly shell, one end of the pull rope is fixed on the piston, and the other end of the pull rope is fixed on the force guide rod;

the cam is fixed on the gear shaft, and the axial direction of the cam is the same as that of the gear shaft;

the force guide rod is a rod body and is positioned on the force guide rod accommodating tube in a sliding manner;

the club head wheel is rotatably and fixedly connected with one end of the force guide rod, which is far away from the pull rope, and is abutted against the cam;

the force guide rod accommodating pipe is fixed on the inner wall of the gearbox shell through the accommodating pipe positioning assembly;

the tension spring in the pipe is positioned in the force guide rod accommodating pipe, one end of the tension spring is fixed on the force guide rod, the other end of the tension spring is fixed on the force guide rod accommodating pipe, and the tension spring has the function of endowing the force guide rod with the tendency of sliding towards the cam.

Preferably, the gearbox also comprises an oil filtering component;

the oil liquid filtering component comprises a filtering sponge, the filtering sponge is positioned in the pumping component shell, and the filtering sponge is positioned at one end, far away from the oil inlet, of the piston in the spatial position.

Preferably, an air deflector is positioned on the transmission housing;

the air deflector plays a role in guiding the flowing direction of air blown out by the blowing assembly, and comprises a U-shaped air deflector and a straight plate;

the U-shaped air deflector is fixed on the gearbox shell, and the axial direction of the U-shaped air deflector is the same as the axial direction of the impeller main body;

the air deflector comprises a straight plate part and a bent plate part;

the number of the straight plate parts is two;

the straight plate is positioned between the two straight plate parts and is fixed on the gearbox shell;

the blowing assembly is positioned between the straight plate and one of the straight plate parts.

Preferably, the gearbox further comprises an air cooling assembly,

the air refrigerating assembly comprises a refrigerating sheet set and an energy supply assembly, wherein the refrigerating sheet set is a combination of a plurality of semiconductor refrigerating sheets and is fixed on the straight plate;

the energy supply assembly is used for supplying energy for the operation of the refrigerating sheet set;

the semiconductor refrigerating sheet comprises a hot end and a cold end;

the air flow blown out by the air blowing component is firstly cooled by the cold end and then blown to the heat dissipation oil pipe, and finally the air flow is blown to the hot end by the heat dissipation oil pipe under the guide of the air deflector to dissipate heat of the hot end so as to accelerate the cooling efficiency.

Preferably, the filter sponge comprises a filter-type sponge body which is in a filter shape;

a sponge placing opening is formed in the shell of the pumping assembly;

the number of the sponge placing openings is two, the sponge placing openings are respectively positioned at two sides of the pumping component shell, and the sponge placing openings in the spatial position are positioned on the side wall, close to the oil inlet and the oil outlet, of the pumping component shell;

the filtering sponge penetrates through the two sponge placing openings;

the oil pumping assembly further comprises a shell closing assembly;

the shell closing assembly is used for closing the sponge placing opening;

the shell closing component comprises a v-shaped frame body and a frame body displacement component;

the v-shaped frame body is an Contraband-shaped plate and is positioned on the pumping component shell in a sliding way under the driving of the frame body displacement component;

the oil liquid filtering component also comprises a sponge body fixing plate, a sponge body accommodating pipe and a fixing plate shifting component;

the sponge fixing plate is fixed on the filter-shaped sponge;

the sponge body containing pipe is an arc-shaped bent pipe and is fixed on the shell of the transmission case, and two ends of the sponge body containing pipe are fixed on the shell of the pumping assembly and are used for containing the filter type sponge body;

the fixed plate shifting assembly is used for dragging the sponge fixed plate to slide in the sponge accommodating tube so as to realize the replacement of the filtering sponge in the pumping assembly shell.

Preferably, the frame displacement assembly comprises a displacement spring and a displacement winch;

the displacement spring is a pressure spring and is positioned between the v-shaped frame body and the pumping assembly shell;

the displacement winch comprises a winch main body and a winch rope;

the hoisting main body is positioned on the v-shaped frame body 21274and used for winding and unwinding the hoisting rope;

one end of the hoisting rope is fixed on the pumping component shell, and the other end of the hoisting rope is positioned on the hoisting main body;

when the winch main body winds the winch rope, the lift type 21274; the filter type sponge body is extruded by the shape frame body, and the sponge placing opening is sealed.

Preferably, the fixed plate displacement assembly comprises a dragging rope and a dragging rope hoisting assembly;

the dragging rope is positioned on the sponge body fixing plate, the dragging rope hoisting assembly is fixed on the sponge body containing pipe, and the dragging rope hoisting assembly is used for hoisting and releasing the dragging rope;

the rope body reversing rods are positioned in the sponge body containing pipe, and the number of the rope body reversing rods is multiple, so that the dragging rope can be reversed.

One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

the impeller capable of rotating under the action of wind power is arranged on the gearbox shell, the blades of the impeller are provided with oil pipes and heat dissipation holes, gear oil is conveyed to the blades by an oil pumping assembly on the gearbox for heat dissipation and then is conveyed back to the interior of the gearbox shell, the gearbox shell is provided with a blowing assembly, and the blowing assembly blows the impeller to rotate and accelerates air circulation near the impeller so as to achieve the purpose of accelerating heat dissipation; the technical problem that the heat dissipation effect of the gearbox in the prior art is not ideal is effectively solved, and then the technical effect of efficient heat dissipation of gear oil in the gearbox is achieved.

Drawings

FIG. 1 is a first schematic structural diagram of an external appearance of a transmission according to the present invention;

FIG. 2 is a schematic diagram of an external structure of the transmission according to the present invention;

FIG. 3 is a schematic view of the internal structure of the transmission of the present invention;

FIG. 4 is a schematic representation of the construction of the pumping assembly housing of the transmission of the present invention;

FIG. 5 is a schematic diagram of an external configuration of an oil pumping assembly of the transmission of the present invention;

FIG. 6 is a schematic diagram of the oil pumping assembly of the transmission of the present invention;

FIG. 7 is a first schematic structural view of a rotating impeller of the transmission of the present invention;

FIG. 8 is a second schematic structural view of a rotating impeller of the transmission of the present invention;

FIG. 9 is a cross-sectional view of the rotating impeller of the transmission of the present invention;

FIG. 10 is a schematic structural view of a housing closure assembly of the transmission of the present invention;

FIG. 11 is a schematic structural view of a sponge containment tube of the transmission of the present invention;

FIG. 12 is a schematic view of the construction of a filter sponge of the transmission of the present invention;

FIG. 13 is a cross-sectional view of an oil filter assembly of the transmission of the present invention.

In the figure:

a gearbox shell 100, an air deflector 110, a U-shaped air deflector 111, a straight plate 112, an upper cover 113,

A speed change mechanism 200, a gear shaft 210,

A rotary impeller 300, an impeller body 310, a central revolving body 320, a fixed base 321, a revolving body 322, an oil passage 323, an oil inlet/outlet 324, a heat radiation oil pipe 330, an oil inlet/outlet 340,

An oil pumping assembly 400, an oil conveying pipe 410, an oil inlet and outlet 411, a pumping assembly housing 420, a sponge placing port 421, a placing port cover plate 422, a tension spring 430, a piston 440, a piston driving assembly 450, a pull rope 451, a cam 452, a force guide rod 453, a rod head wheel 454, a force guide rod accommodating pipe 455, an accommodating pipe positioning assembly 456, an in-pipe tension spring 457, an oil inlet 460, an oil outlet 470, a one-way valve 480, a housing closing assembly 490, an 21274shaped frame 491, a frame shifting assembly 492, a shifting spring 493, a shifting winch 494,

A blowing assembly 500,

An oil liquid filtering component 600, a filtering sponge 610, a filter-shaped sponge 611, a sponge fixing plate 620, a sponge containing pipe 630, a rope reversing rod 631, a fixing plate shifting component 640, a dragging rope 641, a dragging rope winding component 642,

Air cooling assembly 700, cooling fin group 710, hot side 711, and cold side 712.

Detailed Description

In order to facilitate an understanding of the present invention, the present application will now be described more fully with reference to the accompanying drawings; the preferred embodiments of the present invention are illustrated in the accompanying drawings, but the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete.

It is noted that the terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs; the terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention; as used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Fig. 1 is a schematic view of an appearance structure of a transmission according to the present invention; the gearbox comprises a gearbox shell 100, a speed change mechanism 200, a rotating impeller 300, an oil pumping assembly 400 and a blowing assembly 500; this application can carry out the pivoted impeller under the wind-force effect through setting up on gearbox housing 100, be equipped with oil pipe and louvre on the blade of impeller, inside fluid pumping module 400 on utilizing the gearbox carried gear oil to dispel the heat on the blade and then sent back gearbox housing 100 with fluid, and set up on the gearbox housing and blow subassembly 500, blow subassembly 500 and blow near impeller pivoted when accelerateing the circulation of air near and then reach radiating purpose with higher speed.

Example one

As shown in fig. 1, the transmission of the present application includes a transmission housing 100, a transmission mechanism 200, a rotating impeller 300, an oil pumping assembly 400, and a blowing assembly 500.

The gearbox shell 100 is a shell of the gearbox and plays a supporting role for internal components of the gearbox; the transmission mechanism 200 is a functional component of a transmission, positioned inside the transmission housing 100, and includes a gear shaft 210.

The rotary impeller 300 is rotatably and fixedly connected to the gearbox housing 100 and rotates under the blowing of the blowing assembly 500; further, the rotating impeller 300 includes an impeller main body 310, a central revolving body 320, a heat radiation oil pipe 330 and an oil inlet and outlet pipe 340; the impeller body 310 is fixed on the top of the central revolving body 320 and is used for supporting and positioning the heat radiation oil pipe 330; the central revolving body 320 is used for oil transportation, and transports the oil in the oil inlet and outlet pipe 340 to the heat dissipation oil pipe 330 for heat dissipation; as shown in fig. 7 and 8, the heat-dissipating oil pipes 330 are bent several times to be densely distributed on the blades of the impeller body 310 and closely attached to the impeller body 310, and the number of the heat-dissipating oil pipes 330 is one or more, and the heat-dissipating oil pipes are communicated with the internal space of the transmission case through the central rotator 320; the oil inlet and outlet pipes 340 are positioned on the transmission housing 100 to communicate the oil pumping assembly 400 with the central revolving body 320, thereby functioning as an oil passage.

Further, as shown in fig. 7 and 9, the central revolving body 320 is a cylindrical structure, and includes a fixed base 321, a revolving body 322, an oil passage 323, and an oil inlet and outlet 324; the fixed base 321 is cylindrical and fixed on the outer surface of the gearbox housing 100 to position the rotating body 322; an oil inlet and outlet 324 is positioned on the fixed base 321, and the oil inlet and outlet 324 is communicated with the oil inlet and outlet 340; the rotating body 322 is also cylindrical and can be fixedly connected to the fixed base 321 in a rotating manner around the axis direction; the oil passage 323 is positioned inside the fixed base 321 and the rotating body 322 to transfer oil.

Further, the oil inlet and outlet pipe 340 comprises an oil inlet pipe and an oil outlet pipe;

preferably, the fixing base 321 is sleeved on the rotating body 322.

The oil pumping assembly 400 pumps oil in the transmission housing 100 to the heat dissipating oil pipe 330 on the rotary impeller 300 to dissipate heat.

Further, the oil pumping assembly 400 is positioned on the transmission housing 100, as shown in fig. 4 and 5, and includes an oil pipe 410, a pumping assembly housing 420, a piston 440, and a piston driving assembly 450; as shown in fig. 3, the oil delivery pipes 410 are positioned on the inner wall of the transmission case 100, and two oil inlet and outlet holes 411 for oil inlet and outlet are densely distributed on the two oil delivery pipes; the pumping assembly shell 420 is hollow and cylindrical, an oil inlet 460 and an oil outlet 470 are positioned on the pumping assembly shell, and check valves 480 are positioned on the oil inlet 460 and the oil outlet 470; the oil inlet 460 is connected with one of the oil delivery pipes 410, and the oil outlet 470 is communicated with the oil inlet pipe of the oil inlet/outlet pipe 340; the oil outlet pipe is connected with another oil conveying pipe 410; the piston 440 slides by the piston driving assembly 450 to pump oil.

Preferably, the oil pumping assembly 400 further includes a tension spring 430; as shown in fig. 6, the piston driving assembly 450 includes a pulling rope 451, a cam 452, a force-guiding rod 453, a rod head wheel 454, a force-guiding rod accommodating tube 455, an accommodating tube positioning assembly 456 and an in-tube tension spring 457; the tension spring 430 is positioned inside the pumping assembly housing 420, and has one end fixed to the inner wall of the pumping assembly housing 420 and the other end fixed to the piston 440, and is spatially positioned at one end of the piston 440 far from the piston driving assembly 450; the pulling rope 451 extends through the pumping assembly housing 420, and has one end fixed to the piston 440 and the other end fixed to the force guiding rod 453; the cam 452 is fixed on the gear shaft 210, and the axial direction of the cam 452 is the same as that of the gear shaft 210; the force guide rod 453 is a rod body and is positioned on the force guide rod accommodating tube 455 in a sliding manner; the club head wheel 454 is rotatably and fixedly connected to one end of the force guide rod 453 away from the pull rope 451 and abuts against the cam 452; the force guide rod accommodating tube 455 is fixed on the inner wall of the gearbox housing 100 through the accommodating tube positioning assembly 456; the tension spring 457 is positioned inside the force guide rod accommodating tube 455, and has one end fixed to the force guide rod 453 and the other end fixed to the force guide rod accommodating tube 455, thereby giving the force guide rod 453 a tendency to slide toward the cam 452.

Preferably, the length of the oil delivery pipe 410 is 3 to 5 times of the total length of the gearbox, and the oil delivery pipe is arranged to be tightly attached to the inner wall of the gearbox shell 100; the distance between the oil liquid inlet and outlet holes 411 on the oil pipeline 410 is more than one tenth of the total length of the gearbox.

The blowing assembly 500 is positioned on the outer surface of the transmission case 100, and is used for blowing air towards the rotating impeller 300 to blow the impeller body 310 to rotate; further, the blowing assembly 500 is an axial fan, and includes blowing blades and an air guiding cover.

In order to filter impurities in the oil while the oil dissipates heat, preferably, the gearbox further comprises an oil filter assembly 600; further, the oil filter assembly 600 includes a filter sponge 610, and the filter sponge 610 is located inside the pumping assembly housing 420 and is spatially located at an end of the piston 440 far away from the oil inlet 460. Further, a sponge placing port 421 and a placing port cover 422 are arranged on the pumping assembly housing 420; the sponge placing port 421 is positioned on the side wall of the pumping assembly housing 420, and the placing port cover 422 is used for closing the sponge placing port 421.

The technical scheme in the embodiment of the application at least has the following technical effects or advantages:

the technical problem that the heat dissipation effect of the gearbox in the prior art is not ideal is solved, and the technical effect of efficiently dissipating the heat of the gear oil in the gearbox is achieved.

Example two

In order to further improve the heat dissipation effect, in the embodiment of the present application, an air cooling assembly 700 is additionally provided on the basis of the above embodiment, and an air deflector 110 is additionally provided on the transmission case 100;

further, the air deflector 110 plays a role of guiding a flow direction of air blown out by the blowing assembly 500, and the air deflector 110 includes a U-shaped air deflector 111 and a straight plate 112; as shown in fig. 1 and 2, the U-shaped air deflector 111 is fixed to the transmission case 100 in the same axial direction as the impeller main body 310; the air deflector 110 comprises a straight plate part and a bent plate part; the number of the straight plate parts is two; the straight plate 112 is positioned between the two straight plate parts and fixed on the transmission housing 100, and is used for supporting and positioning the air cooling assembly 700; the blowing assembly 500 is positioned between the straight plate 112 and one of the straight plate portions;

in order to further restrict the flowing direction of the air blown out from the blowing assembly 500, preferably, the air deflector 110 further includes an upper cover 113, and the upper cover 113 is shaped like a plate and is fixed to one end of the U-shaped air deflector 111 and the straight plate 112 away from the transmission case 100.

The air cooling assembly 700 comprises a cooling fin group 710 and an energy supply assembly, wherein the cooling fin group 710 is a combination of a plurality of semiconductor cooling fins and is fixed on the straight plate 112 (penetrates through the straight plate 112); the energy supply assembly is used for supplying energy (power supply) for the operation of the refrigerating sheet set 710; the semiconductor refrigeration chip comprises a hot end 711 and a cold end 712; the air flow blown out by the blowing assembly 500 is firstly cooled by the cold end 712, then blown to the heat dissipation oil pipe 330, and finally blown to the hot end 711 under the guidance of the air deflector 110 to dissipate heat of the hot end 711, thereby accelerating the cooling efficiency.

EXAMPLE III

Considering that the effective filtering time of the filtering sponge 610 in the first embodiment is limited, the filtering effect is lost due to the accumulation of impurities, and the periodic replacement is cumbersome.

Preferably, as shown in fig. 10, the filter sponge 610 includes a filter-shaped sponge 611, and the filter-shaped sponge 611 is in a filter shape (shaped like a ring with a gap); the number of the sponge placing openings 421 is two, the sponge placing openings 421 are respectively positioned at two sides of the pumping assembly housing 420, and the sponge placing openings 421 are positioned on the side walls of the pumping assembly housing 420 close to the oil inlet 460 and the oil outlet 470 at the spatial positions; the setting of the placing port cover plate 422 is cancelled; the filtering sponge 610 penetrates through the two sponge placing openings 421;

the oil pumping assembly 400 further comprises a housing closure assembly 490; the shell closing component 490 is used for closing the sponge placing opening 421; further, as shown in FIG. 10, the housing closure assembly 490 includes a v-shaped frame 491 and a frame displacement assembly 492; the v-shaped frame 491 of the 21274is a plate shaped like Contraband and is positioned on the pumping component shell 420 in a sliding way under the driving of the frame displacement component 492; further, the frame displacement assembly 492 comprises a displacement spring 493 and a displacement winch 494; the displacement spring 493 is a compression spring and is positioned between the v-shaped frame 491 and the pumping assembly shell 420; the displacement winch 494 comprises a winch main body and a winch rope; the hoisting main body is positioned on the v-shaped frame body 491 and is used for winding and unwinding the hoisting rope; one end of the hoisting rope is fixed on the pumping assembly shell 420, and the other end of the hoisting rope is positioned on the hoisting main body; when the hoisting main body winds the hoisting rope, the I-shaped frame body 491 extrudes the filter-shaped sponge body 611 and seals the sponge placing opening 421.

As shown in fig. 11 to 13, the oil filter assembly 600 further includes a sponge fixing plate 620, a sponge accommodating tube 630 and a fixing plate displacement assembly 640; the sponge fixing plate 620 is fixed on the filter-shaped sponge 611; the sponge containing tube 630 is an arc-shaped bent tube and is fixed on the transmission case 100, and both ends of the sponge containing tube 630 are fixed on the pumping assembly case 420 and are used for containing the filter-shaped sponge 611; the fixing plate displacing assembly 640 is used for (timing under the control of the control unit of the transmission) dragging the sponge fixing plate 620 to slide in the sponge accommodating tube 630 so as to realize the replacement of the filtering sponge 610 inside the pumping assembly housing 420.

As shown in fig. 13, further, the fixing plate displacing assembly 640 includes a dragging rope 641 and a dragging rope reel assembly 642; the dragging rope 641 is positioned on the sponge fixing plate 620, the dragging rope hoisting component 642 is fixed on the sponge accommodating tube 630, and the dragging rope hoisting component 642 is used for winding and unwinding the dragging rope 641; preferably, a plurality of rope reversing rods 631 are positioned inside the sponge containing tube 630, and the number of the rope reversing rods 631 is used for reversing the dragging rope 641; when the filter sponge 610 inside the pumping assembly housing 420 needs to be replaced, only the housing closing assembly 490 and the fixing plate displacing assembly 640 need to be operated.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A gearbox comprises a gearbox shell and a speed change mechanism, wherein the speed change mechanism comprises a gear shaft and is characterized by further comprising a rotating impeller, an oil pumping assembly and a blowing assembly;

2. The gearbox according to claim 1, wherein the central revolving body is of a cylindrical structure and comprises a fixed base, a revolving body, an oil passage and an oil inlet and an oil outlet;

3. A transmission as defined in claim 1, wherein said oil pumping assembly is positioned on said transmission housing and includes an oil line, a pumping assembly housing, a piston, and a piston drive assembly;

the oil outlet pipe is connected with the other oil conveying pipe;

4. A transmission as in claim 3 wherein said oil pumping assembly further comprises a tension spring;

5. A gearbox according to claim 3 or 4 further comprising an oil filter assembly;

6. A transmission as claimed in claim 1 wherein a wind deflector is located on the transmission housing;

the air deflector comprises a straight plate part and a bent plate part;

the number of the straight plate parts is two;

7. The transmission of claim 6, further comprising an air cooling assembly,