CN-117087547-B - Rotary car ladder device for cab walking platform of combine harvester

CN117087547BCN 117087547 BCN117087547 BCN 117087547BCN-117087547-B

Abstract

The invention discloses a rotating car ladder device for a cab walking platform of a combine harvester, which comprises a base and a rotating car ladder, wherein the rotating car ladder is rotatably arranged on the base, the rotating car ladder can move between a retracted position and at least one unfolding position, a hinge joint is arranged on the base, a supporting hinge piece matched with the hinge joint is arranged on the rotating car ladder, at least two lock holes are formed in the side surface of the hinge joint facing the rotating car ladder, and the lock holes correspond to the retracted position and the unfolding position of the rotating car ladder respectively. The device meets the safety requirement of the cab car ladder in the road running of the combine harvester. Operators can reliably and effectively store the car ladder on the ground and the cab platform. In addition, in the harvesting operation process, the vehicle ladder cannot be the outermost end of the whole machine to cause touching with plants on the left side, so that the damage to farmers is avoided.

Inventors

ZHANG SHAODAN
ZHAO ZHENBIAO
YAN KEYING
WANG ZHAOHUI
YANG YIN
HU BO
LUO SHUICHENG
DAI ZHANCHAO
ZHAO ZILONG
WU MENG
GUO HUI
GUO JINGJING

Assignees

第一拖拉机股份有限公司

Dates

Publication Date: 20260508
Application Date: 20230927

Claims (6)

1. The rotating car ladder device for the cab walking platform of the combine harvester comprises a base and a rotating car ladder, wherein the rotating car ladder is rotatably arranged on the base and is characterized in that the rotating car ladder can move between a retracted position and at least one unfolding position, a hinge joint is arranged on the base, a supporting hinge piece matched with the hinge joint is arranged on the rotating car ladder, and at least two lock holes are formed in the side face of the hinge joint; The locking mechanism comprises a lock head and a pull rod assembly, wherein the lock head is matched with the lock hole in shape, the lock head stretches into the corresponding lock hole and is used for locking the rotary car ladder at the corresponding folding position or unfolding position, one end of the lock head is hinged with the pull rod assembly, and under the action of the pull rod assembly, the lock head can be pulled out from the lock hole to unlock, so that the rotary car ladder and the base are in a relatively rotatable state; The pull rod assembly comprises a pull plate and a pull handle, wherein the first end of the pull plate is hinged with a lock head, the second end of the pull plate is hinged with the pull handle, the middle section of the pull plate is also connected with one end of a tension spring, the other end of the tension spring is fixed on a rotating car ladder, the lock head can automatically reset to enter a corresponding lock hole under the action of the tension force of the tension spring to lock the rotating car ladder in a natural state, the middle section hinge point of the pull handle is rotationally connected with the rotating car ladder, the pull handle is divided into two sections through the middle section hinge point, the first section of the pull handle is hinged with the pull plate, the second section of the pull handle is hinged with the first end of a connecting rod, the second end of the connecting rod is hinged with the lower end of a control rod welding piece, the control rod welding piece is rotatably arranged on the rotating car ladder and penetrates through the rotating car ladder from bottom to top, the upper end of the control rod welding piece is provided with a flower-shaped knob, and the control rod welding piece comprises a control rod body and a control rod connecting plate fixedly arranged at the lower end of the control rod body, and the control rod connecting plate can be rotated with the axis center.
2. The rotating car ladder device for the cab walking platform of the combine harvester according to claim 1, wherein the lock head sleeve is fixed at the hinged end of the rotating car ladder, and a sliding hole for enabling the lock head to move along the telescopic direction is formed in the lock head sleeve.
3. The rotating car ladder device for the cab deck of the combine harvester according to claim 1, wherein the control rod connecting plate is provided with a limiting arm, and when the lock head is pulled out from the lock hole, the lock head, the pull plate, the handle, the connecting rod and the control rod connecting plate are sequentially linked, so that the limiting arm rotates and abuts against the limiting plate to limit the pulling-out position of the lock head.
4. The rotating car ladder device for the cab walking platform of the combine harvester according to claim 1, wherein the rotating car ladder is provided with a positioning pin, the positioning pin is located on one side of the lock head, and when the rotating car ladder rotates to the stowing position, the positioning pin is in abutting contact with the side face of the base, and the lock head can be just clamped into a corresponding lock hole.
5. The rotating ladder device for the cab deck of the combine harvester according to claim 1, wherein the two lock holes are distributed at an included angle of 90 degrees.
6. The rotating car ladder device for the cab walking platform of the combine harvester according to claim 1, wherein the hinge is provided with a vertical shaft hole, a corresponding lock hole is formed in the outer side wall of the hinge, the supporting hinge comprises an upper hinge and a lower hinge, the upper hinge and the lower hinge are vertically corresponding and are correspondingly provided with shaft sleeves, the shaft sleeves correspond to the vertical shaft hole, and the hinge is connected with the supporting hinge in a rotating mode through the shaft sleeves and the vertical shaft hole sequentially through the hinge shaft.

Description

Rotary car ladder device for cab walking platform of combine harvester Technical Field The invention belongs to the field of harvesters, and relates to a rotary car ladder device for a cab walking board of a combine harvester. Background The car ladder is a ladder arranged for facilitating an operator to enter the working space. The vertical height of the cab of the existing combine harvester from the ground is generally larger than 550mm, and the vehicle ladder is arranged according to national standard requirements. When the combine harvester turns on the road, the boarding ladder becomes the outermost end of the whole machine, so that adverse effects such as collision with vehicles during road running and collision of the boarding ladder against unharvested crops during crop harvesting are caused. The car ladder used in the existing harvester cab is generally fixed on a walking platform of the cab, and the car ladder is gradually inclined outwards from top to bottom and is exposed outside the whole harvester. When the combine is transferred on a road, the width of the vehicle ladder exposed outside the whole harvester exceeds the standard, and in the harvesting operation process, the vehicle ladder becomes the outermost end of the whole harvester and continuously contacts plants at the side edge of the combine harvester, so that the vehicle body of the combine harvester and the harvested plants are damaged, a vehicle owner and farmers suffer from losses, and in the prior art, a mechanism for realizing the rotation of the vehicle ladder is also arranged, but the operation is not convenient enough. Disclosure of Invention The invention aims to solve the problems in the prior art and provide a rotating car ladder device for a cab walking board of a combine harvester, which meets the safety requirement of the car ladder of the cab in the road running of the combine harvester. Operators can reliably and effectively store the car ladder on the ground and the cab platform. In addition, in the harvesting operation process, the vehicle ladder cannot be the outermost end of the whole machine to cause touching with plants on the left side, so that the damage to farmers is avoided. The rotating car ladder device for the cab walking platform of the combine harvester comprises a base and a rotating car ladder, wherein the rotating car ladder is rotatably arranged on the base, the rotating car ladder can move between a retracted position and at least one unfolding position, a hinge joint is arranged on the base, a supporting hinge piece matched with the hinge joint is arranged on the rotating car ladder, at least two lock holes are formed in the side face of the hinge joint, and the lock holes are used for locking the rotating car ladder in the retracted position or the unfolding position respectively. The locking mechanism comprises a lock head and a pull rod assembly, wherein the lock head is matched with the lock hole in shape, the lock head stretches into the corresponding lock hole and is used for locking the rotary car ladder at a corresponding folding position or unfolding position, one end of the lock head is hinged with the pull rod assembly, and under the action of the pull rod assembly, the lock head can be pulled out from the lock hole to unlock, so that the rotary car ladder and the base are in a relatively rotatable state. As the preferable scheme, the telescopic rotary car ladder also comprises a lock sleeve, wherein the lock sleeve is fixed at the hinged end of the rotary car ladder, and a sliding hole for the lock to move along the telescopic direction is arranged on the lock sleeve. As the preferred scheme, the pull rod assembly further comprises a pull plate and a pulling handle, the first end of the pull plate is hinged with the lock head, the second end of the pull plate is hinged with the pulling handle, the middle section of the pull plate is further connected with one end of a tension spring, the other end of the tension spring is fixed on the rotary car ladder, and under the action of the tension force of the tension spring, the lock head can automatically reset to enter a corresponding lock hole in a natural state to lock the rotary car body. As the preferred scheme, the middle section pin joint of pulling handle is connected with the rotation car ladder rotation type, pulling handle passes through middle section pin joint and falls into two sections with it, and pulling handle's first section is articulated with the pull rod, and pulling handle's second section is articulated with the first end of connecting rod, the second end of connecting rod is articulated with the lower extreme of control rod seam spare, and the rotatable installation of control rod seam spare is on the rotation car ladder and passes the rotation car ladder from bottom to top to be provided with flower knob on the control rod seam spare. As the preferable scheme, the control rod welding piece comprises a control rod body