Novel negative pressure fan control system for seeder

Abstract

The utility model discloses a novel negative pressure fan control system for a seeder, which comprises a transmission shaft and a negative pressure fan, an electromagnetic clutch is mounted on the transmission shaft, and a driven wheel of the electromagnetic clutch is in transmission connection with a fan rotating shaft of the negative pressure fan; and a travel switch is arranged between a coil of the electromagnetic clutch and the power supply. The electromagnetic clutch is additionally arranged between the transmission shaft and the negative pressure fan interface and is controlled by the travel switch, a driver only needs to operate a PTO operating rod once during seeding, then the negative pressure fan is automatically controlled by the travel switch connecting pipe, the driver is prevented from frequently operating the operating rod, and the labor intensity of the driver is reduced; and when seeding is stopped, the negative pressure fan automatically stops working, so that fuel consumption is reduced, the seeding cost is reduced, the working time of the fan is shortened, and the service life of the fan is prolonged.

Description

Technical Field

[0001] The utility model belongs to the field of agricultural machinery, and in particular relates to a new type of negative pressure fan control system for a seed drill. Background Art

[0002] A seeder is an agricultural machine that can accurately control the seed sowing depth, plant spacing, row spacing and sowing amount according to agronomic requirements. During sowing, the traditional negative pressure fan is combined with the tractor after the driver starts the tractor, operates the joystick on the tractor, turns on the tractor PTO output, and the drive shaft transmits power to the negative pressure fan, which starts working to generate the vacuum required for sowing. When the seeder changes plots, it is necessary to operate the joystick to turn off the tractor output; when arriving at a new plot, the tractor PTO output is turned on again. Utility Model Content

[0003] The utility model provides a novel negative pressure fan control system for a seed drill, which changes the working mode of the negative pressure fan, controls the start and stop of the negative pressure fan by a travel switch and an electromagnetic clutch, and only requires one operation of the PTO joystick, thereby avoiding frequent operation of the joystick by the driver and reducing the driver's labor intensity.

[0004] The technical solution adopted by the utility model is:

[0005] A new type of negative pressure fan control system for a seed drill includes a transmission shaft and a negative pressure fan, wherein an electromagnetic clutch is installed on the transmission shaft, and the driven wheel of the electromagnetic clutch is connected to the fan shaft of the negative pressure fan; a travel switch is arranged between the coil of the electromagnetic clutch and the power supply. The electromagnetic clutch, also known as an electromagnetic coupling, is an electromagnetic mechanical connector that uses the electromagnetic induction principle and the friction between the inner and outer friction plates to enable the two rotating parts in the mechanical transmission system to be combined or separated from the driven parts without stopping the rotation of the active parts. By controlling the power on and off of the electromagnetic clutch, the power of the transmission shaft is transmitted to the negative pressure fan.

[0006] As a preferred solution of the utility model, the travel switch is installed on a tractor or a seeder, and the travel switch detects the position state of the seeder. The seeder is installed on the rear side of the tractor and is lifted and lowered by the tractor. When the seeder is lowered by the tractor, the travel switch energizes the power supply and the electromagnetic clutch, the electromagnetic clutch is energized, the power of the transmission shaft is transmitted to the negative pressure fan, and the negative pressure fan works; when the seeder is lifted, the travel switch cuts off the power supply and the electromagnetic clutch, the power of the transmission shaft cannot be transmitted to the negative pressure fan, and the negative pressure fan does not work.

[0007] As a preferred solution of the utility model, the power supply forms a power supply circuit through the normally open contact of the travel switch and the coil of the electromagnetic clutch.

[0008] The utility model adds an electromagnetic clutch between the transmission shaft and the negative pressure fan interface. The electromagnetic clutch is controlled by a travel switch. When sowing, the driver only needs to operate the PTO joystick once, and then the negative pressure fan control is taken over by the travel switch for automatic control, which avoids the driver's frequent operation of the joystick and reduces the driver's labor intensity. When sowing stops, the negative pressure fan automatically stops working, which reduces fuel consumption, reduces sowing costs, and at the same time reduces the working time of the fan and extends the service life of the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0010] Figure 1 It is a structural schematic diagram of the utility model.

[0011] Figure 2 The utility model is a circuit schematic diagram of the electromagnetic clutch and travel switch.

[0012] Figure 3 It is a schematic diagram of the state of the seeder of the utility model when it is lifted and not working.

[0013] Figure 4 The utility model is a schematic diagram of the state of the seed drill during operation. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0015] Example:

[0016] A new type of negative pressure fan control system for seed drill, such as Figure 1 As shown, it includes a transmission shaft 1 and a negative pressure fan 3, the transmission shaft 1 is equipped with an electromagnetic clutch 2, the driven wheel of the electromagnetic clutch 2 is connected to the fan shaft of the negative pressure fan 3 through a belt; a travel switch is arranged between the coil of the electromagnetic clutch 2 and the power supply 5, and the specific circuit is as follows Figure 2 As shown, the power supply forms a power supply circuit through the normally open contacts of the travel switch and the coil of the electromagnetic clutch.

[0017] The travel switch 4 is installed on the tractor or the seeder, and the travel switch detects the position state of the seeder. The seeder is installed at the rear side of the tractor and is controlled by the tractor to lift and lower. When starting sowing, the driver turns on the PTO output of the tractor. When the seeder is lowered by the tractor into the sowing state, as Figure 4 shown, the travel switch closes to energize the power supply and the electromagnetic clutch. The electromagnetic clutch is energized and engaged, and the power of the transmission shaft is transmitted to the negative pressure fan. The negative pressure fan works to generate the vacuum degree required for sowing; when the seeder is lifted, as Figure 3 shown, the travel switch disconnects, the power supply and the electromagnetic clutch are de-energized, and the power of the transmission shaft cannot be transmitted to the negative pressure fan, and the negative pressure fan does not work. When restarting sowing, the electromagnetic clutch is automatically energized and the fan automatically starts working.

[0018] The electromagnetic clutch is also called an electromagnetic coupling. It applies the principle of electromagnetic induction and the frictional force between the inner and outer friction plates to enable two rotating components in a mechanical transmission system to be combined or separated with each other without the driving component stopping rotating. By controlling the energization and de-energization of the electromagnetic clutch, the control of whether the power of the transmission shaft is transmitted to the negative pressure fan is realized.

[0019] In the description of this specification, the descriptions with reference to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0020] The above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A negative pressure fan control system for a new type of seeder, comprising a transmission shaft (1) and a negative pressure fan (3), characterized in that: An electromagnetic clutch (2) is installed on the transmission shaft (1), and the driven wheel of the electromagnetic clutch (2) is in transmission connection with the fan rotating shaft of the negative pressure fan (3); a travel switch is arranged between the coil of the electromagnetic clutch (2) and the power supply.

2. The negative pressure fan control system for the novel seeder according to claim 1, wherein: The travel switch is installed on a tractor or a seeder, and the travel switch detects the position state of the seeder.

3. The negative pressure fan control system for the new seeder according to claim 1 or 2, characterized in that: The power supply forms a power supply loop with the coil of the electromagnetic clutch through the normally open contact of the travel switch.

Images