Stem and spike header reverse transmission device

Abstract

The utility model belongs to the technical field of harvester auxiliary transmission mechanisms, and particularly relates to a stalk and spike header reverse transmission device which comprises a gear box, a power input shaft, a transmission shaft and a power output shaft are rotationally arranged in the gear box, and the power input shaft is in transmission connection with the transmission shaft. The transmission shaft is in transmission connection with the power output shaft, the power input shaft is in transmission connection with a power driving mechanism, the power output shaft is in transmission connection with the header, a reverse transmission box is arranged on the gearbox, the end of the transmission shaft is movably sleeved with a spline sleeve, a motor and an oil cylinder are installed on the reverse transmission box, and the spline sleeve is movably sleeved with the spline sleeve. An output shaft of the motor and the transmission shaft are coaxially arranged, a piston rod of the oil cylinder is connected with a reverse gear shifting shaft, a shifting fork is arranged on the reverse gear shifting shaft, and the shifting fork is connected with the spline housing in an inserted mode. The header forward and reverse rotation function is achieved, pure mechanical transmission is adopted, and the header has the advantages of being high in reliability, low in cost and the like.

Description

Technical Field

[0001] The utility model relates to a reverse transmission device for a stem and ear combined harvesting platform, belonging to the technical field of auxiliary transmission mechanisms of harvesters. Background Art

[0002] When a harvester harvests crops, due to complex harvesting conditions, such as weeds, stalks, plastics and other sundries, it is easy to cause blockage of the feeding of the harvesting platform. For example, when harvesting corn, the harvesting platform is conveyed by the ear picking component. When harvesting lodging corn, the corn straws entering the harvesting platform are in a mess and are extremely easy to cause blockage of the feeding of the harvesting platform. In addition, due to objective factors such as growth conditions and varieties of crops, the maturity conditions are not the same, and it is more likely to cause blockage of the feeding of the harvesting platform. For the problem of blockage of the feeding of the harvesting platform, the general solutions are as follows: one is to adopt the method of manual cleaning after stopping the machine. Manual cleaning is time-consuming and laborious, and production needs to wait until the blockage of the harvesting platform is manually cleaned before continuing, which seriously affects the work efficiency and there are safety hazards; the other is to use a hydraulic motor to drive the harvesting platform to reverse to achieve the purpose of cleaning the blockage. The reverse rotation of the harvesting platform can clean the blockage without stopping the machine, thereby improving the harvesting efficiency, can automatically clean the blockage, reduce the dependence on manual labor, improve safety, and avoid the wear and damage of the components of the harvester caused by frequent blockage cleaning, thereby prolonging the service life of the mechanical equipment. However, because the hydraulic motor with the function of forward and reverse rotation is expensive and has a large volume, the cost of using the hydraulic motor to realize the reverse rotation of the harvesting platform is relatively high. Summary of the Utility Model

[0003] The utility model aims at the defects of the prior art and provides a reverse transmission device for a stem and ear combined harvesting platform.

[0004] The technical solution of the utility model to solve the above technical problems is as follows:

[0005] A reverse transmission device for a stem and ear combined harvesting platform includes a gearbox. A power input shaft, a transmission shaft and a power output shaft are rotatably arranged in the gearbox. The power input shaft is in transmission connection with the transmission shaft, the transmission shaft is in transmission connection with the power output shaft, the power input shaft is in transmission connection with a power driving mechanism, the power output shaft is in transmission connection with the harvesting platform. A reverse transmission box is arranged on the gearbox. The end of the transmission shaft passes through the gearbox and extends into the transmission box and is movably sleeved with a spline sleeve. A motor and an oil cylinder are installed on the reverse transmission box. The output shaft of the motor extends into the reverse transmission box. The output shaft of the motor is coaxially arranged with the transmission shaft. The piston rod of the oil cylinder extends into the reverse transmission box and is connected with a reverse shift shaft. A shift fork is arranged on the reverse shift shaft. The shift fork is inserted into the spline sleeve.

[0006] The beneficial effects of the present utility model are as follows: The present utility model drives the spline sleeve to move on the transmission shaft through structures such as an oil cylinder, a reverse shift shaft, and a fork. When the feeding of the cutting table is blocked, the power drive mechanism stops running, and there is no power input to the power input shaft. The oil cylinder drives the reverse shift shaft to drive the fork to move, so that the spline sleeve moves on the transmission shaft, realizing the connection between the transmission shaft and the output shaft of the motor. Driven by the power of the motor, the transmission shaft rotates in reverse, thereby transmitting the reverse power to the power output shaft and driving the cutting table to rotate in reverse, realizing the positive and reverse rotation functions of the cutting table, solving the problem that after the traditional cutting table is blocked by feeding, it must be stopped for manual treatment, resulting in low efficiency. The present utility model can be realized by using an ordinary hydraulic motor, without using a hydraulic motor with positive and reverse rotation functions, solving the problem of high cost of realizing the reverse rotation of the cutting table by using a positive and reverse rotation hydraulic motor. The present utility model adopts a pure mechanical transmission, with advantages such as high reliability and low cost.

[0007] On the basis of the above technical solution, the present utility model can also be improved as follows:

[0008] Further, a reset mechanism is provided in the reverse transmission case, and the reset mechanism is used for resetting the reverse shift shaft.

[0009] Further, the reset mechanism is a reset spring. The reset spring is sleeved on the reverse shift shaft, and the reset spring is arranged on the side of the fork away from the oil cylinder, and the end of the reset spring is abutted against the reverse transmission case.

[0010] The beneficial effect of adopting the above further technical solution is: When the feeding blockage of the cutting table is solved by reverse rotation, the piston rod of the oil cylinder resets, and the reverse shift shaft is reset through the reset spring.

[0011] Further, the power input shaft is connected to gear one by a key, the transmission shaft is connected to gear two by a key, and gear one meshes with gear two.

[0012] Further, the power output shaft is connected to gear three by a key, and gear three meshes with gear two.

[0013] Further, a groove is provided on the spline sleeve, and a convex block is provided at the end of the fork, and the convex block is inserted into the groove.

[0014] Further, a spring gasket is provided at the end of the reset spring.

[0015] The beneficial effect of adopting the above further technical solution is: The reset spring is installed through the spring gasket, with stable installation and reduced wear of the reset spring. Description of the Drawings

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the present utility model;

[0017] Figure 2 is the top view of the present utility model;

[0018] Figure 3 is Figure 2 the sectional view taken along the A-A section of;

[0019] Figure 4 is Figure 2 the sectional view taken along the B-B section of.

[0020] The reference numerals are recorded as follows: 1, gearbox; 2, power input shaft; 3, transmission shaft; 4, power output shaft; 5, gear one; 6, gear two; 7, gear three; 8, reverse transmission box; 9, spline sleeve; 10, motor; 11, oil cylinder; 12, reverse shift shaft; 13, fork; 14, return spring; 15, spring washer. Specific embodiments

[0021] The principles and features of the present utility model will be described below in conjunction with the accompanying drawings. The examples given are only for explaining the present utility model and are not intended to limit the scope of the present utility model.

[0022] Refer to Figures 1-4 , a reverse transmission device for a stem and ear combined harvesting platform, comprising a gearbox 1, in which a power input shaft 2, a transmission shaft 3 and a power output shaft 4 are rotatably provided. The power input shaft 2 is in transmission connection with the transmission shaft 3. Specifically, the power input shaft 2 is connected to a gear one 5 by a key. The gear one 5 is a twenty-seven-tooth gear. The transmission shaft 3 is connected to a gear two 6 by a key. The gear two 6 is a twenty-four-tooth gear. The gear one 5 meshes with the gear two 6. The transmission shaft 3 is in transmission connection with the power output shaft 4. Specifically, the power output shaft 4 is connected to a gear three 7 by a key. The gear three 7 is a twenty-one-tooth gear. The gear three 7 meshes with the gear two 6. The power input shaft 2 is in transmission connection with a power driving mechanism. The power driving mechanism drives the power input shaft 2 to rotate. The power input shaft 2 drives the gear one 5 to rotate, and through the meshing of the gear one 5 with the gear two 6 and the meshing of the gear two 6 with the gear three 7, the power is sequentially transmitted to the transmission shaft 3 and the power output shaft 4. The power output shaft 4 is in transmission connection with the harvesting platform, thereby driving the harvesting platform to harvest crops. The present utility model does not make specific limitations on the power driving mechanism.

[0023] The gearbox 1 is provided with a reversing transmission box 8, the end of the transmission shaft 3 passes through the gearbox 1 and extends into the transmission box and is movably sleeved with a spline sleeve 9, a motor 10 and a cylinder 11 are installed on the reversing transmission box 8, the output shaft of the motor 10 extends into the reversing transmission box 8, the output shaft of the motor 10 is coaxially arranged with the transmission shaft 3, the piston rod of the cylinder 11 extends into the reversing transmission box 8 and is connected with a reverse shifting gear shaft 12, a shift fork 13 is provided on the reverse shifting gear shaft 12, and the shift fork 13 is plugged into the spline sleeve 9. Specifically, a groove is provided on the spline sleeve 9, and a protrusion is provided at the end of the shift fork 13, and the protrusion is plugged into the groove.

[0024] The reverse transmission box 8 is provided with a reset mechanism, and the reset mechanism is used to reset the reverse shift gear shaft 12. Specifically, the reset mechanism is a reset spring 14, which is sleeved on the reverse shift gear shaft 12, and the reset spring 14 is arranged on the side of the shift fork 13 away from the oil cylinder 11, and the end of the reset spring 14 is mounted on the reverse transmission box 8. A spring washer 15 is provided at the end of the reset spring 14.

[0025] The stem-ear harvesting platform reversing transmission device of the utility model is divided into two working states:

[0026] (1) During normal operation, the power input shaft 2 is the input end of the gearbox 1. The power input shaft 2 transmits power to the gear 1 5 through a key connection, and the meshing force between the gear 1 5 and the gear 2 6 is used to transmit the power to the transmission shaft 3. The gear 2 6 and the transmission shaft 3 are connected by a key. The meshing force between the gear 2 6 and the gear 3 7 and the key connection between the gear 3 7 and the power output shaft 4 transmits the power to the power output shaft 4. The power output shaft 4 drives the harvester to harvest crops normally.

[0027] (2) When the cutting platform feed is blocked, the cutting platform power drive mechanism stops, and the working state of the gear box 1 is switched to the reverse state, that is, the piston rod of the cylinder 11 extends, pushing the reverse shift shaft 12, and then pushing the fork 13 to move the spline sleeve 9 on the transmission shaft 3, so that the spline sleeve 9 is connected to the output shaft of the motor 10, and the motor 10 is started. The power of the motor 10 is transmitted to the transmission shaft 3 through the spline sleeve 9, so that the transmission shaft 3 is reversed, and the gear 2 6 is connected to the transmission shaft 3 by a key, and the power is transmitted to the gear 3 7 through the meshing relationship, and then the power is transmitted to the power output shaft 4 through the key connection between the gear 3 7 and the power output shaft 4, thereby driving the cutting platform to reverse.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A stem and ear combined harvesting table reverse transmission device, including a gearbox (1), characterized in that, A power input shaft (2), a transmission shaft (3) and a power output shaft (4) are rotatably arranged in the gear box (1); the power input shaft (2) is transmission-connected to the transmission shaft (3); the transmission shaft (3) is transmission-connected to the power output shaft (4); the power input shaft (2) is transmission-connected to a power drive mechanism; the power output shaft (4) is transmission-connected to a cutting platform; a reversing transmission box (8) is arranged on the gear box (1); an end of the transmission shaft (3) passes through the gear box (1) and extends into the transmission box The inner and movable sleeve is provided with a spline sleeve (9), the reversing transmission box (8) is equipped with a motor (10) and an oil cylinder (11), the output shaft of the motor (10) extends into the reversing transmission box (8), the output shaft of the motor (10) is coaxially arranged with the transmission shaft (3), the piston rod of the oil cylinder (11) extends into the reversing transmission box (8) and is connected with a reversing gear shaft (12), the reversing gear shaft (12) is provided with a shift fork (13), and the shift fork (13) is plugged with the spline sleeve (9).

2. The reverse transmission device for the stem and ear combined harvesting platform according to claim 1, characterized in that, A reset mechanism is provided in the reverse transmission box (8), and the reset mechanism is used for resetting the reverse shift shaft (12).

3. The reverse drive device for the stem and ear combined harvesting platform according to claim 2, characterized in that, The reset mechanism is a reset spring (14), the reset spring (14) is sleeved on the reverse shift shaft (12), and the reset spring (14) is arranged on a side of the shift fork (13) away from the oil cylinder (11), and the end of the reset spring (14) is mounted on the reverse transmission box (8).

4. The reverse drive device for the stem and ear combined harvesting platform according to claim 3, characterized in that The power input shaft (2) is connected to gear one (5) via a key, the transmission shaft (3) is connected to gear two (6) via a key, and the gear one (5) is meshed with the gear two (6).

5. The stem and ear combined harvesting table reverse transmission device according to claim 4, characterized in that, The power output shaft (4) is connected to gear three (7) via a key, and the gear three (7) is meshed with the gear two (6).

6. The reverse transmission device for the stem and ear combined harvesting platform according to claim 5, characterized in that, The spline sleeve (9) is provided with a groove, and the end of the shift fork (13) is provided with a protrusion, and the protrusion is inserted into the groove.

7. The reverse transmission device for the stem and ear combined harvesting platform according to claim 6, wherein A spring washer (15) is provided at the end of the return spring (14).

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