CN111688484A - Walking hydraulic speed regulating system for cotton picker - Google Patents

Abstract

The invention provides a traveling hydraulic speed regulating system for a cotton picker, which includes an engine, a transfer case, a two-way variable pump, a two-way variable motor, a hydraulic-mechanical stepless gearbox, a transfer case, a front drive shaft, a front axle, a front Wheel, rear drive shaft, rear axle, rear wheel. The system has reasonable design and flexible operation. It can meet the driving speed and torque of the cotton picker by controlling the displacement ratio of the bidirectional variable pump, the displacement ratio of the bidirectional variable motor, the stage of the hydraulic-mechanical CVT and the transfer case. requirements to obtain good speed control performance. The system has adjustable walking speed, variable torque and simple operation. It is suitable for cotton picker operations with load fluctuations and transportation requirements, and meets the driving requirements of cotton pickers.

Description

A walking hydraulic speed regulating system for cotton pickers

technical field

The invention belongs to the technical field of hydraulic transmission, in particular to a traveling hydraulic speed regulating system for a cotton picker.

Background technique

The cotton picker needs to adjust the speed and torque according to the different load and driving state during the working process, so a walking speed control system for cotton picker with adjustable walking speed, variable torque and simple operation is required. In the prior art, most of the power shift travel systems of cotton pickers use power shift travel speed regulation systems, which cannot fully meet production requirements.

SUMMARY OF THE INVENTION

In view of the above problems in the prior art, the present invention provides a walking hydraulic speed control system for a cotton picker, which is applied to the walking speed control of the cotton picker, and adjusts the forward speed and torque of the cotton picker according to the driving requirements of the cotton picker. Controlled hydraulic motor and gearbox structure to achieve stepless speed change.

The walking hydraulic speed regulating system for a cotton picker provided by the invention mainly includes: 1-engine; 2-transfer case; 3-two-way variable pump; 4-two-way variable motor; 5-hydraulic mechanical stepless gearbox; 6- Transfer case; 7-front driveshaft; 8-front axle; 9-front wheel; 10-rear driveshaft; 11-rear axle; 12-rear wheel.

Among them, the engine 1 is connected to the transfer case 2 through the output shaft; the transfer case 2 distributes the power of the engine 1 and then outputs the power through the output shaft, and the output shaft of the transfer case is connected to the input shaft of the two-way variable pump 3 and the input shaft through the mechanical structure. The input shaft of the hydraulic mechanical stepless gearbox 5; the bidirectional variable pump 3 converts the mechanical energy provided by the transfer case 2 into hydraulic energy, which is transmitted to the bidirectional hydraulic motor 4 through the hydraulic pipeline; the bidirectional hydraulic motor 4 converts the hydraulic pressure provided by the bidirectional variable pump 3 It can be converted into rotational speed and torque, and transmitted to the hydraulic mechanical CVT 5 through the output shaft; the hydraulic mechanical CVT 5 combines the mechanical energy from the transfer case 2 and the two-way hydraulic motor 4, and connects the transfer case 6 through the output shaft; The transfer case 6 outputs the power to the front drive shaft 7 and the rear drive shaft 10 through a mechanical connection; the front drive shaft 7 outputs the power to the front axle 8 through a mechanical connection; the front axle 8 drives the front wheel 9 forward through a mechanical connection; The shaft 10 outputs power to the rear axle 11 through a mechanical connection; the rear axle 11 drives the rear wheel 12 forward through the mechanical connection.

The transfer case may have multiple output shafts, wherein one output shaft connects the bidirectional variable pump 3 and the hydraulic-mechanical CVT 5 through a mechanical structure; the mechanical structure is a gear structure.

Wherein, the displacement ratio of the two-way variable pump 3 and the two-way variable motor 4 is controllable, and the maximum displacement is the same.

Wherein, the hydraulic-mechanical CVT is a planetary gear structure gearbox, and the hydraulic-mechanical CVT may have multiple planetary rows and multiple output shafts; the multiple output shafts correspond to multiple mechanical The multiple mechanical segments correspond to different speed ranges, and are switched through the clutch segment; the planetary row merges the mechanical energy from the transfer case 2 and the two-way hydraulic motor 4, and the output shaft output.

Among them, the transfer case can transmit the power output from the gearbox to the front drive shaft and the rear drive shaft at the same time, and it is stipulated that the gear position of the transfer case is at the 1st gear at this time; It is transmitted to the front drive shaft, which stipulates that the transfer case is in 2nd gear at this time.

In particular, the present invention can control the displacement ratio of the two-way variable pump 3, the displacement ratio of the two-way variable motor 4, the hydraulic-mechanical continuously variable gearbox position and the transfer gear position according to the traveling speed and torque requirements, so as to meet the requirements of cotton picking. driving requirements.

The present invention provides the above solution. The system has adjustable walking speed, variable torque and simple operation, is suitable for cotton picker operations with load fluctuations and transportation requirements, and meets the driving requirements of the cotton picker. The above-mentioned embodiments and drawings are only used to illustrate the technical solutions of the present invention and not to limit them. Any modification or equivalent replacement of the technical solutions of the present invention without departing from the purpose and scope of the solutions of the present invention shall be included in the scope of the claims of the present invention. .

Description of drawings

Figure 1. Working principle diagram of a walking hydraulic speed control system for cotton pickers.

In the attached drawings: 1-engine; 2-transfer case; 3-two-way variable pump; 4-two-way variable motor; 5-hydraulic mechanical stepless gearbox; 6-transfer case.

Figure 2 Schematic diagram of the cotton picker chassis.

In the drawings: 6-transfer case; 7-front transmission shaft; 8-front axle; 9-front wheel; 10-rear transmission shaft; 11-rear axle; 12-rear wheel.

Detailed ways

In order to illustrate the technical features of this solution, the present invention will be described in detail below with reference to the accompanying drawings.

As shown in Figure 1 and Figure 2, a walking hydraulic speed regulating system for cotton picking machine is characterized in that: comprising 1-engine; 2-transfer case; 3-two-way variable pump; 4-two-way variable motor; 5- Hydraulic-mechanical CVT; 6-transfer case; 7-front propshaft; 8-front axle; 9-front wheel; 10-rear propshaft; 11-rear axle; 12-rear wheel.

Among them, the engine 1 is connected to the transfer case 2 through the output shaft; the transfer case 2 distributes the power of the engine 1 and then outputs the power through the output shaft, and the output shaft of the transfer case is connected to the input shaft of the two-way variable pump 3 and the input shaft through the mechanical structure. The input shaft of the hydraulic mechanical stepless gearbox 5; the bidirectional variable pump 3 converts the mechanical energy provided by the transfer case 2 into hydraulic energy, which is transmitted to the bidirectional hydraulic motor 4 through the hydraulic pipeline; the bidirectional hydraulic motor 4 converts the hydraulic pressure provided by the bidirectional variable pump 3 It can be converted into rotational speed and torque, and transmitted to the hydraulic mechanical CVT 5 through the output shaft; the hydraulic mechanical CVT 5 combines the mechanical energy from the transfer case 2 and the two-way hydraulic motor 4, and connects the transfer case 6 through the output shaft; The transfer case 6 outputs the power to the front drive shaft 7 and the rear drive shaft 10 through a mechanical connection; the front drive shaft 7 outputs the power to the front axle 8 through a mechanical connection; the front axle 8 drives the front wheel 9 forward through a mechanical connection; The shaft 10 outputs power to the rear axle 11 through a mechanical connection; the rear axle 11 drives the rear wheel 12 forward through the mechanical connection.

The transfer case may have multiple output shafts, wherein one output shaft connects the bidirectional variable pump 3 and the hydraulic-mechanical CVT 5 through a mechanical structure; the mechanical structure is a gear structure.

Wherein, the displacement ratio of the two-way variable pump 3 and the two-way variable motor 4 is controllable, and the maximum displacement is the same.

Wherein, the hydraulic-mechanical CVT is a planetary gear structure gearbox, and the hydraulic-mechanical CVT may have multiple planetary rows and multiple output shafts; the multiple output shafts correspond to multiple mechanical The multiple mechanical segments correspond to different speed ranges, and are switched through the clutch segment; the planetary row merges the mechanical energy from the transfer case 2 and the two-way hydraulic motor 4, and the output shaft output.

Among them, the transfer case can transmit the power output from the gearbox to the front drive shaft and the rear drive shaft at the same time, and it is stipulated that the gear position of the transfer case is at the 1st gear at this time; It is transmitted to the front drive shaft, which stipulates that the transfer case is in 2nd gear at this time.

When the cotton picker is in a normal working state, the cotton picker is in a four-wheel drive state: at this time, the displacement ratio of the two-way variable pump 3 changes dynamically according to the working speed requirements, and is used as a variable pump; the displacement ratio of the two-way hydraulic motor 4 is set It is 1, used as a quantitative motor; the hydraulic mechanical continuously variable gearbox 5 is changed according to the working speed and torque requirements; the transfer case 6 is in the 1st gear; the power of the engine 1 is connected to the transfer case 2 through the output shaft; After the power of 1 is distributed, the power is output through the output shaft. The output shaft of the transfer case connects the input shaft of the two-way variable pump 3 and the input shaft of the hydraulic mechanical CVT 5 through the mechanical structure; the two-way variable pump 3 transfers the mechanical energy provided by the transfer case 2. It is converted into hydraulic energy and transmitted to the bidirectional hydraulic motor 4 through the hydraulic pipeline; the bidirectional hydraulic motor 4 converts the hydraulic energy provided by the bidirectional variable pump 3 into rotational speed torque, which is transmitted to the hydraulic machinery stepless gearbox 5 through the output shaft; the hydraulic machinery The continuously variable gearbox 5 combines the mechanical energy from the transfer case 2 and the two-way hydraulic motor 4, and connects the transfer case 6 through the output shaft; the transfer case 6 outputs the power to the front drive shaft 7 and the rear drive shaft 10 simultaneously through the mechanical connection; The front drive shaft 7 outputs power to the front axle 8 through a mechanical connection; the front axle 8 drives the front wheel 9 forward through a mechanical connection; the rear drive shaft 10 outputs power to the rear axle 11 through a mechanical connection; the rear axle 11 drives the rear axle through a mechanical connection. Wheel 12 advances.

When the cotton picker is in a high load state or climbing state, and the driving torque provided by the four-wheel drive cannot meet the demand of the cotton picker, the cotton picker is in the front wheel drive state: at this time, the displacement ratio of the two-way variable pump 3 is set to 1. Used as a quantitative pump; the displacement ratio of the two-way hydraulic motor 4 changes dynamically according to the working speed requirements, and is used as a variable motor; the hydraulic-mechanical CVT 5 is changed according to the working speed and torque requirements; the transfer case 6 is located in the 2nd gear At this time, the cotton picker is in the front wheel drive state, and the cotton picker has a high driving force; the power of the engine 1 is connected to the transfer case 2 through the output shaft; the transfer case 2 distributes the power of the engine 1 and outputs it through the output shaft Power, the output shaft of the transfer case connects the input shaft of the two-way variable pump 3 and the input shaft of the hydraulic-mechanical CVT 5 through the mechanical structure; the two-way variable pump 3 converts the mechanical energy provided by the transfer case 2 into hydraulic energy, which is transmitted through the hydraulic pipeline. to the two-way hydraulic motor 4; the two-way hydraulic motor 4 converts the hydraulic energy provided by the two-way variable pump 3 into rotational speed torque, and transmits it to the hydraulic mechanical stepless gearbox 5 through the output shaft; the hydraulic mechanical stepless gearbox 5 will come from the transfer case 2 Combined with the mechanical energy of the two-way hydraulic motor 4, the transfer case 6 is connected through the output shaft; the transfer case 6 outputs the power to the front drive shaft 7 through the mechanical connection; the front drive shaft 7 outputs the power to the front axle 8 through the mechanical connection; The axle 8 drives the front wheel 9 forward through a mechanical connection.

When the cotton picker is in the no-load transportation state and needs a higher forward speed, at this time: the displacement ratio of the two-way variable pump 3 is set to 1, which is used as a quantitative pump; the displacement ratio of the two-way hydraulic motor 4 is dynamically based on the working speed requirements. It is used as a variable motor; the hydraulic-mechanical CVT 5 changes sections according to the working speed and torque requirements; the transfer case 6 is in the 1st gear; at this time, the cotton picker is in a four-wheel drive state, and the cotton picker has a higher forward speed. Speed; the power of engine 1 is connected to transfer case 2 through the output shaft; transfer case 2 distributes the power of engine 1 and then outputs power through the output shaft, and the output shaft of transfer case connects the two-way variable pump 3 input shaft and hydraulic machinery through the mechanical structure The input shaft of the CVT 5; the bidirectional variable pump 3 converts the mechanical energy provided by the transfer case 2 into hydraulic energy, which is transmitted to the bidirectional hydraulic motor 4 through the hydraulic pipeline; the bidirectional hydraulic motor 4 converts the hydraulic energy provided by the bidirectional variable pump 3 into For the rotational speed torque, it is transmitted to the hydraulic mechanical continuously variable gearbox 5 through the output shaft; the hydraulic mechanical continuously variable gearbox 5 combines the mechanical energy from the transfer case 2 and the two-way hydraulic motor 4, and connects the transfer case 6 through the output shaft; The device 6 outputs power to the front drive shaft 7 and the rear drive shaft 10 simultaneously through a mechanical connection; the front drive shaft 7 outputs the power to the front axle 8 through a mechanical connection; the front axle 8 drives the front wheel 9 forward through a mechanical connection; 10 outputs the power to the rear axle 11 through the mechanical connection; the rear axle 11 drives the rear wheel 12 forward through the mechanical connection.

The present invention provides the above solution. The system has adjustable walking speed, variable torque and simple operation, is suitable for cotton picker operations with load fluctuations and transportation requirements, and meets the driving requirements of the cotton picker. The above-mentioned embodiments and drawings are only used to illustrate the technical solutions of the present invention and not to limit them. Any modification or equivalent replacement of the technical solutions of the present invention without departing from the purpose and scope of the solutions of the present invention shall be included in the scope of the claims of the present invention. .

Claims (3)

1. A walking hydraulic speed regulation system for a cotton picker: the method mainly comprises the following steps: the engine, transfer case, two-way variable pump, two-way variable motor, hydraulic machinery stepless gear box, transfer case, front drive shaft, front axle, front wheel, rear drive shaft, rear axle, rear wheel.

2. The walking hydraulic speed regulating system for the cotton picker according to claim 1, characterized in that: the engine is connected with the transfer case through an output shaft; the power of the engine is distributed by the transfer case and then is output through an output shaft, and the output shaft of the transfer case is connected with the input shaft of the bidirectional variable pump and the input shaft of the hydraulic mechanical stepless gearbox through a mechanical structure; the bidirectional variable pump converts mechanical energy provided by the transfer case into hydraulic energy, and the hydraulic energy is transmitted to the bidirectional hydraulic motor through the hydraulic pipeline; the bidirectional hydraulic motor converts hydraulic energy provided by the bidirectional variable pump into rotating speed torque, and the rotating speed torque is transmitted to the hydraulic mechanical stepless gearbox through the output shaft; the hydraulic mechanical stepless speed changing box converges mechanical energy from the transfer case and the bidirectional hydraulic motor and is connected with the transfer case through an output shaft; the transfer case outputs power to the front transmission shaft and the rear transmission shaft through mechanical connection; the front transmission shaft outputs power to a front axle through mechanical connection; the front axle drives the front wheel to move forward through mechanical connection; the rear transmission shaft outputs power to a rear axle through mechanical connection; the rear axle drives the rear wheel to advance through mechanical connection.

3. The walking hydraulic speed regulating system for the cotton picker according to claim 1, characterized in that: the displacement ratio of the bidirectional variable pump, the displacement ratio of the bidirectional variable motor, the stepless speed changing box section of the hydraulic machine and the gear of the transfer case can be controlled according to the requirements of the running speed and the torque so as to meet the driving requirements of the cotton picker.

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