CN222185716U - Gearbox filtration system and harvester - Google Patents

Abstract

The utility model provides a gearbox filter system and a harvester, wherein the gearbox filter system comprises: the two ends of the filtering pipeline are connected with the gearbox, the oil pump and the filtering mechanism are both arranged on the filtering pipeline. The gearbox oil is filtered, so that the utilization rate of lubricating oil can be improved, the frequency of replacing the lubricating oil by a user is reduced, the fault rate of the gearbox is reduced, and the service life of the gearbox is prolonged.

Description

Gearbox filtration system and harvester

Technical Field

The utility model relates to the technical field of gearboxes, in particular to a gearbox filtering system and a harvester.

Background

The very durable nature of the gearbox, which is one of the most critical components in the power transmission of the harvester, tends to make maintenance unnecessary to the user. However, timely cleaning of impurities inside the gearbox or periodic replacement of lubricating oil will greatly extend the service life of the gearbox.

The current mode of cleaning the impurities in the gearbox is mainly absorbed by the magnet at the bottom, and the period of replacing lubricating oil is more dependent on the consciousness of self maintenance of users.

Under normal conditions, the bolts of the oil outlet at the bottom of the gearbox are replaced by magnet bolts for adsorbing scrap iron in the gearbox. The method has a plurality of defects, namely the effective adsorption area is smaller, the adsorption capacity of the method is gradually reduced along with the increase of surface impurities, and the lubricating oil can leak out synchronously when the magnet bolt is dismounted during scrap iron treatment on the surface of the method. In addition, can effectively solve the problem of inside impurity through the mode of in time changing gearbox oil. However, users rarely replace transmission oil periodically, either for cost considerations or because of lack of maintenance awareness.

Disclosure of utility model

The utility model aims to solve the technical problem of providing a gearbox filtering system and a harvester aiming at the defects of the prior art.

The technical scheme includes that the transmission case filtering system comprises a transmission case, an oil pump, a filtering mechanism and a filtering pipeline, wherein two ends of the filtering pipeline are connected with the transmission case, and the oil pump and the filtering mechanism are arranged on the filtering pipeline.

The technical scheme has the beneficial effects that the gearbox oil is filtered, so that the utilization rate of the lubricating oil can be improved, the frequency of replacing the lubricating oil by a user is reduced, the fault rate of the gearbox is reduced, and the service life of the gearbox is prolonged.

Further, the oil pump comprises a controller, wherein the controller is connected with the oil pump, and the controller is connected with a display terminal.

The automatic oil filtering device has the advantages that the automatic oil filtering device can automatically filter the gearbox oil at regular time through electric control, so that the utilization rate of lubricating oil can be improved, the frequency of replacing the lubricating oil by a user can be reduced, the fault rate of the gearbox can be reduced, and the service life of the gearbox can be prolonged. The electrical components are connected to the controller via wiring harnesses for logic processing. The controller is connected with the display screen in a CAN communication mode and is used for displaying the current pressure, pressure difference, oil quality, current state information, alarm information and the like.

Further, a timer is arranged in the controller, and the display terminal is a display screen.

The technical scheme has the beneficial effects that the electric elements are connected to the controller through the wire harness for logic processing. The controller is connected with the display screen in a CAN communication mode and is used for displaying the current pressure, pressure difference, oil quality, current state information, alarm information and the like.

Further, an oil product detection device is arranged on the filter pipeline and is positioned between the gearbox and the filter mechanism.

The technical scheme has the beneficial effects that the oil quality detection device is newly added at the rear end of the filtering mechanism, and the device mainly realizes oil quality detection through the photoelectric correlation principle. The newly-increased oil product detection device can timely feed back the oil product state to the controller, and finally the timely replacement effect of reminding the user is achieved through interaction between the display screen and the user.

Further, the oil product detection device comprises a photoelectric intensity emission end and a photoelectric intensity receiving end, wherein the photoelectric intensity emission end and the photoelectric intensity receiving end are respectively arranged on two sides of the filtering pipeline, and the photoelectric intensity emission end corresponds to the photoelectric intensity receiving end in position.

The oil quality detection device is newly added at the rear end of the filtering mechanism, and the device mainly realizes oil quality detection through a photoelectric correlation principle, wherein a photoelectric intensity transmitting end is arranged on one side of a pipeline, and a photoelectric intensity receiving end is arranged on the other corresponding side. The device mainly reflects the quality of engine oil by using the light intensity of the receiving end, and when internal impurities are increased, the light intensity of the photoelectric intensity receiving end is correspondingly weakened gradually. When the critical value is exceeded, the oil product detection device outputs a signal to the controller. After receiving the standard exceeding signal, the controller outputs the standard exceeding signal to the display terminal, so as to achieve the alarm effect and further remind a user of timely replacing engine oil.

Further, the filtering mechanism comprises a first filter and a second filter, wherein the first filter and the second filter are both installed on the filtering pipeline, and the oil pump is located between the first filter and the second filter.

The detachable magnet adsorption device is additionally arranged in the first filter, and the first filter is structurally modified, so that scrap iron in lubricating oil can be effectively removed, meanwhile, the detachable magnet adsorption device is convenient to detach and clean, the replacement frequency of the second filter is effectively reduced, and the service cycle of the second filter is prolonged.

Further, a first pressure gauge and a second pressure gauge are arranged on the filter pipeline, and the second filter is located between the first pressure gauge and the second pressure gauge.

The technical scheme has the beneficial effects that two pressure gauges are respectively arranged at two ends of the filtering mechanism. When the filtering mechanism is blocked, the pressure difference of the system is increased, and when the pressure difference accumulation exceeds a certain limit value, the system gives out pressure difference overrun alarm so as to remind a user to replace the filtering mechanism. Two pressure gauges are respectively arranged at two ends of the second filter, and the combination is connected behind the first filter. When the second filter is blocked, the pressure difference of the system is increased, and when the pressure difference accumulation exceeds a certain limit value, the system gives out pressure difference overrun alarm so as to remind a user to replace the second filter.

Further, be equipped with removable spiral magnet adsorption equipment and filter screen in the first filter, the bottom of first filter is funnel formula structure, be equipped with lubricating oil in the gearbox.

The technical scheme has the beneficial effects that the first filter is arranged at the bottom outlet of the gearbox, and the spiral magnet adsorption device is arranged in the first filter. When the lubricating oil flows through the inside, the tiny scrap iron in the lubricating oil can be effectively adsorbed. Wherein, the system improves the structure of first filter, and the bottom forms a funnel type structure, has increased the deposit region, more effectually gets rid of impurity such as iron fillings in the oil circuit. The detachable magnet adsorption device is additionally arranged in the first filter, the first filter is structurally modified, scrap iron in lubricating oil can be effectively removed, meanwhile, the detachable magnet adsorption device is convenient to detach and clean, the replacement frequency of the second filter is effectively reduced, and the service life of the second filter is prolonged. The newly-increased oil pressure detection device can prompt a user to replace the second filter in time, and repeated use of lubricating oil with more impurities is avoided.

Further, a rotating speed sensor is arranged on the gearbox, and the rotating speed sensor corresponds to a gear on a transmission shaft in the gearbox.

The technical scheme has the beneficial effects that the rotating speed sensor is arranged on the gearbox and used for detecting whether the transmission shaft is in an operating state or not. When the transmission shaft runs, the controller starts to record the working time of the gearbox, and when the working time exceeds the limit value, the system automatically starts the gearbox filtering system and lasts for a certain time to remove impurities in the lubrication system. The system interval time and the duration can be configured by the intelligent display terminal.

In addition, the utility model also provides a harvester, which comprises the gearbox filtering system.

The technical scheme has the beneficial effects that the automatic timing filtration of the gearbox oil is realized through electric control, the utilization rate of the lubricating oil can be improved, the frequency of replacing the lubricating oil by a user is reduced, the fault rate of the gearbox is reduced, and the service life of the gearbox is prolonged.

Additional aspects of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

Fig. 1 is a schematic structural diagram of a transmission filter system according to an embodiment of the present utility model.

Fig. 2 is a schematic structural diagram of a first filter according to an embodiment of the present utility model.

Fig. 3 is a second schematic structural diagram of a first filter according to an embodiment of the present utility model.

The reference numerals are 1, a gearbox, 2, an oil pump, 3, a filtering mechanism, 4, a filtering pipeline, 5, an oil product detecting device, 6, a first filter, 7, a second filter, 8, a photoelectric intensity transmitting end, 9, a photoelectric intensity receiving end, 10, a rotating speed sensor, 11, a first pressure gauge, 12, a second pressure gauge, 13, a replaceable spiral magnet adsorption device, 14, a filter screen, 15 and a funnel-shaped structure.

Detailed Description

The principles and features of the present utility model are described below with reference to the drawings, the illustrated embodiments are provided for illustration only and are not intended to limit the scope of the present utility model.

As shown in fig. 1 to 3, the embodiment of the utility model provides a transmission filtering system, which comprises a transmission 1, an oil pump 2, a filtering mechanism 3 and a filtering pipeline 4, wherein both ends of the filtering pipeline 4 are connected with the transmission 1, and the oil pump 2 and the filtering mechanism 3 are arranged on the filtering pipeline 4.

The technical scheme has the beneficial effects that the gearbox oil is filtered, so that the utilization rate of the lubricating oil can be improved, the frequency of replacing the lubricating oil by a user is reduced, the fault rate of the gearbox is reduced, and the service life of the gearbox is prolonged.

Further, the device also comprises a controller, wherein the controller is connected with the oil pump 2, and is connected with a display terminal.

The automatic oil filtering device has the advantages that the automatic oil filtering device can automatically filter the gearbox oil at regular time through electric control, so that the utilization rate of lubricating oil can be improved, the frequency of replacing the lubricating oil by a user can be reduced, the fault rate of the gearbox can be reduced, and the service life of the gearbox can be prolonged. The electrical components are connected to the controller via wiring harnesses for logic processing. The controller is connected with the display screen in a CAN communication mode and is used for displaying the current pressure, pressure difference, oil quality, current state information, alarm information and the like.

It should be noted that, the transmission filtering system can realize the work of each device through manual control of a user, so as to realize the transmission filtering work. Specifically, the user judges whether the gearbox works according to the rotation speed sensor, under gearbox operating condition, the user periodically opens the oil pump for the inside lubricating oil of gearbox gets into gearbox filtration system, and the user judges whether lubricating oil needs to be changed through the oil information that oil detection device carried display terminal. And the user calculates the pressure difference according to the readings of the first pressure gauge and the second pressure gauge, judges whether the second filter is blocked or not, and timely changes the second filter when the second filter is blocked. The automatic control can also be realized through a controller, and the control method for controlling all devices by the controller is the prior art, namely, the method for controlling an oil pump, an oil product detection device, a photoelectric intensity transmitting end, a photoelectric intensity receiving end, a rotating speed sensor, a first pressure gauge, a second pressure gauge and the like by the controller is the prior art. The user can set the controller according to the actual needs to realize automatic control, and the description is omitted here.

Further, a timer is arranged in the controller, and the display terminal is a display screen.

The technical scheme has the beneficial effects that the electric elements are connected to the controller through the wire harness for logic processing. The controller is connected with the display screen in a CAN communication mode and is used for displaying the current pressure, pressure difference, oil quality, current state information, alarm information and the like.

As shown in fig. 1 to 3, further, an oil product detecting device 5 is disposed on the filtering pipeline 4, and the oil product detecting device 5 is located between the gearbox 1 and the filtering mechanism 3.

The technical scheme has the beneficial effects that the oil quality detection device is newly added at the rear end of the filtering mechanism, and the device mainly realizes oil quality detection through the photoelectric correlation principle. The newly-increased oil product detection device can timely feed back the oil product state to the controller, and finally the timely replacement effect of reminding the user is achieved through interaction between the display screen and the user.

As shown in fig. 1 to 3, the oil product detection device 5 further includes a photoelectric intensity transmitting end 8 and a photoelectric intensity receiving end 9, wherein the photoelectric intensity transmitting end 8 and the photoelectric intensity receiving end 9 are respectively installed at two sides of the filtering pipeline 4, and the photoelectric intensity transmitting end 8 corresponds to the position of the photoelectric intensity receiving end 9.

The oil quality detection device is newly added at the rear end of the filtering mechanism, and the device mainly realizes oil quality detection through a photoelectric correlation principle, wherein a photoelectric intensity transmitting end is arranged on one side of a pipeline, and a photoelectric intensity receiving end is arranged on the other corresponding side. The device mainly reflects the quality of engine oil by using the light intensity of the receiving end, and when internal impurities are increased, the light intensity of the photoelectric intensity receiving end is correspondingly weakened gradually. When the critical value is exceeded, the oil product detection device outputs a signal to the controller. After receiving the standard exceeding signal, the controller outputs the standard exceeding signal to the display terminal, so as to achieve the alarm effect and further remind a user of timely replacing engine oil.

As shown in fig. 1 to 3, the filtering mechanism 3 further comprises a first filter 6 and a second filter 7, wherein the first filter 6 and the second filter 7 are both installed on the filtering pipeline 4, and the oil pump 2 is positioned between the first filter 6 and the second filter 7.

The detachable magnet adsorption device is additionally arranged in the first filter, and the first filter is structurally modified, so that scrap iron in lubricating oil can be effectively removed, meanwhile, the detachable magnet adsorption device is convenient to detach and clean, the replacement frequency of the second filter is effectively reduced, and the service cycle of the second filter is prolonged.

As shown in fig. 1 to 3, further, the filtering pipeline 4 is provided with a first pressure gauge 11 and a second pressure gauge 12, and the second filter 7 is located between the first pressure gauge 11 and the second pressure gauge 12.

The technical scheme has the beneficial effects that two pressure gauges are respectively arranged at two ends of the filtering mechanism. When the filtering mechanism is blocked, the pressure difference of the system is increased, and when the pressure difference accumulation exceeds a certain limit value, the system gives out pressure difference overrun alarm so as to remind a user to replace the filtering mechanism. Two pressure gauges are respectively arranged at two ends of the second filter, and the combination is connected behind the first filter. When the second filter is blocked, the pressure difference of the system is increased, and when the pressure difference accumulation exceeds a certain limit value, the system gives out pressure difference overrun alarm so as to remind a user to replace the second filter.

As shown in fig. 1 to 3, further, the first filter 6 is provided with a replaceable spiral magnet adsorption device 13 and a filter screen 14, the bottom of the first filter 6 is a funnel structure 15, and the gearbox 1 is provided with lubricating oil.

The technical scheme has the beneficial effects that the first filter is arranged at the bottom outlet of the gearbox, and the spiral magnet adsorption device is arranged in the first filter. When the lubricating oil flows through the inside, the tiny scrap iron in the lubricating oil can be effectively adsorbed. Wherein, the system improves the structure of first filter, and the bottom forms a funnel type structure, has increased the deposit region, more effectually gets rid of impurity such as iron fillings in the oil circuit. The detachable magnet adsorption device is additionally arranged in the first filter, the first filter is structurally modified, scrap iron in lubricating oil can be effectively removed, meanwhile, the detachable magnet adsorption device is convenient to detach and clean, the replacement frequency of the second filter is effectively reduced, and the service life of the second filter is prolonged. The newly-increased oil pressure detection device can prompt a user to replace the second filter in time, and repeated use of lubricating oil with more impurities is avoided.

As shown in fig. 1 to 3, further, a rotation speed sensor 10 is provided on the gearbox 1, and the rotation speed sensor 10 corresponds to a gear on a transmission shaft in the gearbox 1.

The technical scheme has the beneficial effects that the rotating speed sensor is arranged on the gearbox and used for detecting whether the transmission shaft is in an operating state or not. When the transmission shaft runs, the controller starts to record the working time of the gearbox, and when the working time exceeds the limit value, the system automatically starts the gearbox filtering system and lasts for a certain time to remove impurities in the lubrication system. The system interval time and the duration can be configured by the intelligent display terminal.

In addition, the utility model also provides a harvester, which comprises the gearbox filtering system.

The technical scheme has the beneficial effects that the automatic timing filtration of the gearbox oil is realized through electric control, the utilization rate of the lubricating oil can be improved, the frequency of replacing the lubricating oil by a user is reduced, the fault rate of the gearbox is reduced, and the service life of the gearbox is prolonged.

Wherein, the main principle of spiral structure (removable spiral magnet adsorption equipment) increases the area of contact of absorption. A typical filtration system comprises two different structures, a coarse filter and a fine filter, which are primarily distinguished to filter impurities of different pore sizes. In the utility model, a large-aperture filter screen (filter screen) is additionally arranged on the side of a coarse filter (first filter), the aperture is in the order of mm, and a detachable spiral filter device (a replaceable spiral magnet adsorption device) is additionally arranged in the coarse filter, and the coarse filter is mainly used for filtering and adsorbing large scrap iron residues and the like. The fine filter (second filter) is designed as a filter element structure, and is used for filtering impurities which cannot be effectively removed in the coarse filter (first filter) in the um level aiming at the filter element with finer and smaller aperture of the um level.

The rotation speed sensor can be mounted on the shell of the gearbox through a threaded hole. The principle is that when the sensing surface of the sensor (rotating speed sensor) detects the tooth on the gear of the rotating shaft (transmission shaft), the sensor (rotating speed sensor) is triggered to respond. When the relative position of the sensing surface and the gear is in the middle of the teeth, no response is generated. If the sensor (rotational speed sensor) can continuously receive the pulse signal, the gearbox is in an operating state, otherwise, the gearbox is in a non-operating state.

Both ends of the coarse filter (first filter) are screwed into the whole pipeline (filtering pipeline). The main improvement point 1 is that a funnel type structure (funnel type structure) is added at the bottom for effectively settling impurities. Improvement point 2, newly add at funnel formula structure bottom and dismantle adsorption equipment (removable spiral magnet adsorption equipment), the inside heliciform structure of device is magnet, increase adsorption area. And the device can be installed and disassembled through threads, and can be cleaned regularly.

The coarse filter device (first filter) can be improved in a cylindrical tube type structure, and a filter screen with a mm level is additionally arranged on the side edge of the coarse filter device, so that large impurities are trapped.

The spiral structures inside the detachable adsorption device (replaceable spiral magnet adsorption device) are magnets with adsorption capacity.

The oil (gearbox oil, lubricating oil and engine oil) is opened and closed at fixed time in a mode of a controller and an oil pump, so that the oil circulation is realized, and the direction of the oil passing through the filters (the first filter and the second filter) is from left to right.

The gearbox filtering system provided by the embodiment of the utility model can effectively overcome the defects of the existing mode, thereby greatly prolonging the service life of the gearbox.

The embodiment of the utility model provides a transmission filtering system, which comprises a transmission shell, a coarse filter (a first filter) with a replaceable spiral adsorption device, an oil pump, a fine filter (a second filter), an oil product detection device, a rotation speed sensor, a controller, an intelligent display terminal (a display terminal, a display screen) and the like.

The rotating speed sensor is arranged on the gearbox shell (gearbox) and is used for detecting whether the main transmission shaft (transmission shaft) is in an operating state. When the main transmission shaft runs, the controller starts to record the working time of the gearbox, and when the working time exceeds the limit value, the system automatically starts the gearbox filtering system and lasts for a certain time to remove impurities in the lubrication system. When the duration time is up, the system stops running and refreshes the working time again until the working time is up again. In addition, the system interval time and the duration time can be configured through the intelligent display terminal.

The coarse filter (first filter) is installed at the bottom outlet of the gearbox housing (gearbox), and a spiral magnet adsorption device (replaceable spiral magnet adsorption device) is installed inside the coarse filter (first filter). When lubricating oil (gearbox oil, engine oil) flows through the inside, fine scrap iron in the lubricating oil can be effectively adsorbed. Wherein, the system carries out the structural innovation to the structure of coarse filter (first filter), and the bottom forms a funnel formula structure (funnel formula structure), has increased the deposit region, more effectively gets rid of impurity such as iron fillings in the oil circuit (filtration pipeline).

The outlet of the coarse filter (the first filter) is connected with an oil pump, and the oil pump is driven to realize the timing circulation function of lubricating oil according to the use duration of the timing gearbox at the end of the controller.

Two pressure gauges (first pressure gauge and second pressure gauge) are respectively installed at both ends of the fine filter (second filter), and the combination is connected to the coarse filter (first filter). When the fine filter (the second filter) is blocked, the pressure difference of the system is increased, and when the pressure difference is accumulated to exceed a certain limit value, the system gives out a pressure difference overrun alarm so as to remind a user to replace the fine filter (the second filter).

An oil quality detection device (oil quality detection device) is newly added at the rear end of a fine filter (a second filter), the device mainly realizes oil quality detection through a photoelectric correlation principle, wherein a photoelectric intensity transmitting end is arranged at one side of a pipeline (a filtering pipeline), and a photoelectric intensity receiving end is arranged at the other side of the pipeline. The device mainly reflects the quality of engine oil (lubricating oil and gearbox oil) by using the light intensity of a receiving end (photoelectric intensity receiving end), and when internal impurities are increased, the light intensity of the receiving end (photoelectric intensity receiving end) can be correspondingly and gradually weakened. When the threshold value is exceeded, the oil quality detection device (oil quality detection device) outputs a signal to the whole vehicle controller (controller). After receiving the exceeding signal, the controller outputs the exceeding signal to the intelligent display screen (display terminal and display screen) to achieve the alarm effect, so that a user is reminded of timely replacing engine oil.

The electrical components are connected to the controller via wiring harnesses for logic processing. The controller is connected with the intelligent display screen in a CAN communication mode and is used for displaying current pressure, pressure difference, oil quality, current state information, alarm information and the like.

Firstly, realize regularly filtering gearbox oil (lubricating oil, engine oil) automatically through automatically controlled (be the oil pump draws gearbox oil and walks the process of round at filtration system), can greatly improve the utilization ratio of lubricating oil, improve the life of gearbox, reduced gearbox fault rate.

Secondly, newly increased detachable magnet adsorption equipment (removable spiral magnet adsorption equipment) in coarse filter (first filter) to carry out structural transformation to coarse filter (first filter), can effectively get rid of the iron fillings in the lubricating oil, still convenient to detach clearance, the effectual change frequency that reduces fine filter (second filter), improved the life cycle of fine filter (second filter).

Thirdly, the new oil pressure detection device (the first pressure gauge and the second pressure gauge) can prompt a user to replace the fine filter (the second filter) in time, and repeated use of lubricating oil with more impurities is avoided.

Fourth, newly-increased oil quality detection device (oil quality detection device), can be with timely feedback to the controller of oil state, through intelligent display screen and user interaction at last, reach the timely effect of changing of warning user.

Through measures such as newly-increased timing automatic circulation function, optimizing coarse filter (first filter), newly-increased detachable device (removable spiral magnet adsorption equipment's coarse filter (first filter), oil detection (oil detection device), can effectively increase the rate of utilization of lubricating oil and fine filter (second filter), reduce user's change lubricating oil's frequency, improved life, reduced maintenance cost.

In addition, the utility model also provides a harvester, which comprises the gearbox filtering system.

The technical scheme has the beneficial effects that the automatic timing filtration of the gearbox oil is realized through electric control, the utilization rate of the lubricating oil can be improved, the frequency of replacing the lubricating oil by a user is reduced, the fault rate of the gearbox is reduced, and the service life of the gearbox is prolonged.

It should be noted that the above embodiments are merely for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solution described in the above embodiments may be modified or some or all of the technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present utility model.

Claims (8)

1. A transmission filtering system is characterized by comprising a transmission, an oil pump, a filtering mechanism and a filtering pipeline, wherein two ends of the filtering pipeline are connected with the transmission, the oil pump and the filtering mechanism are arranged on the filtering pipeline, an oil product detection device is arranged on the filtering pipeline and is positioned between the transmission and the filtering mechanism, the filtering mechanism comprises a first filter and a second filter, the first filter and the second filter are arranged on the filtering pipeline, and the oil pump is positioned between the first filter and the second filter.

2. The transmission filter system of claim 1, further comprising a controller coupled to the oil pump, the controller coupled to a display terminal.

3. The transmission filter system of claim 2, wherein the controller is provided with a timer, and the display terminal is a display screen.

4. The transmission filter system of claim 1, wherein the oil detection device comprises a photoelectric intensity transmitting end and a photoelectric intensity receiving end, the photoelectric intensity transmitting end and the photoelectric intensity receiving end are respectively arranged on two sides of the filter pipeline, and the photoelectric intensity transmitting end corresponds to the photoelectric intensity receiving end in position.

5. A transmission filter system according to claim 1, wherein the filter line is provided with a first pressure gauge and a second pressure gauge, the second filter being located between the first pressure gauge and the second pressure gauge.

6. The transmission filter system of claim 1, wherein the first filter has a replaceable spiral magnet adsorption device and a filter screen, the bottom of the first filter has a funnel structure, and the transmission has lubricating oil.

7. A transmission filter system according to claim 1, wherein the transmission is provided with a rotational speed sensor which corresponds to a gear on a drive shaft in the transmission.

8. Harvester, characterized by comprising a gearbox filter system according to any of the preceding claims 1 to 7.