Crawling ladder for agricultural machine

Abstract

The utility model discloses a ladder stand for agricultural machinery in the technical field of agricultural machinery, which is characterized in that a fixed platform and a movable platform are arranged, and a foldable fixed ladder stand and a foldable movable ladder stand are mounted at one end, far away from the fixed platform, of the movable platform, so that when a user needs to get off or get on, the movable platform can be rotated to the side edge of the agricultural machinery; when the crawling ladder needs to be stored, the movable crawling ladder can be lifted firstly, so that the movable crawling ladder is converted into the folded state, and at the moment, the total height of the movable crawling ladder and the fixed crawling ladder is reduced; and then the crawling ladder mechanism is rotated to the position close to the agricultural machine through horizontal rotation of the movable platform, the movable platform is rotated to be in a storage state, at the moment, the crawling ladder mechanism does not occupy the side space of the agricultural machine, the width of the agricultural machine is not increased, meanwhile, crops are not hit, and the risk of damage caused by collision is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to agricultural machinery technical field, concretely is a kind of agricultural machinery ladder. BACKGROUND

[0002] In order to make operator can have better vision, its cab is generally arranged at the top of agricultural machinery, which makes operator need to climb to agricultural machinery or leave from agricultural machinery by ladder;

[0003] The ladder used in existing agricultural machinery is mostly fixedly assembled and closely fitted to the vehicle body, so that the space on both sides of the cab of the whole machine is occupied by the ladder, so that the width of material flow and other components is limited when the whole machine is within a certain width range, on the one hand, there is a risk of the whole machine being too wide, and the crops will be damaged when working, further, the ladder device has a low and constant ground clearance, which makes the machine have a risk of damage to a series of components in a specific working environment.

[0004] Based on this, the utility model designs an agricultural machinery ladder to solve the above problems. UTILITY MODEL CONTENTS

[0005] To achieve the above object, the utility model provides the following technical scheme: an agricultural machinery ladder, comprising a fixed platform, a movable platform and a ladder mechanism; the fixed platform is fixedly connected with the agricultural machinery, and is used for mounting the movable platform and the ladder mechanism on the agricultural machinery; the movable platform is rotatably arranged at one end of the fixed platform about a vertical rotation shaft, so that the movable platform can rotate horizontally; the ladder mechanism comprises a fixed ladder, a movable ladder and a folding mechanism, the fixed ladder is fixedly arranged at one end of the movable platform away from the rotation shaft, and the movable ladder is movably arranged on the fixed ladder through the folding mechanism, so that the movable ladder can be lowered or raised relative to the fixed ladder.

[0006] As a further scheme of the utility model, the top surface of the movable platform is not higher than the bottom surface of the fixed platform, so that the movable platform can be rotated to be within the vertical projection range of the fixed platform.

[0007] As a further scheme of the utility model, the bottom surface of the fixed platform is fixedly provided with an extension seat, a telescopic pipe is slidably arranged in the extension seat, and the rotation shaft is arranged at one end of the telescopic pipe away from the extension seat, so that the movable platform is rotatably arranged on the telescopic pipe.

[0008] As a further scheme of the utility model, the folding mechanism comprises flip arms rotatably arranged on both sides of the fixed ladder, one end of the flip arm away from the fixed ladder is rotatably arranged on the movable ladder, at least two flip arms are arranged on both sides of the fixed ladder, and the flip arms are parallel to each other, so that a parallelogram mechanism is formed between the fixed ladder, the movable ladder and the flip arms.

[0009] As a further scheme of the utility model, the telescopic pipe is provided with a first locking mechanism for locking the movable platform, and the fixed ladder is provided with a second locking mechanism and a third locking mechanism for locking the movable ladder at different positions.

[0010] As a further scheme of the utility model, the first locking mechanism comprises a first swing rod and a first locking pin, the first locking pin is arranged at one end of the first swing rod, a mounting frame is fixedly arranged on the telescopic pipe, the first swing rod is rotationally arranged on the mounting frame about a horizontal shaft, so as to drive the first locking pin to ascend or descend through swing rod rotation, and the movable platform is provided with a lock hole at a corresponding position, and the first locking pin is used for inserting into the lock hole of the movable platform to lock the movable platform.

[0011] As a further scheme of the utility model, one end of the first swing rod, away from the first locking pin, is rotationally provided with a first pressing rod, the top end of the first pressing rod protrudes from the top surface of the fixed platform, and a spring is sleeved on the first pressing rod for resetting the first pressing rod.

[0012] As a further scheme of the utility model, the second locking mechanism comprises a second locking pin, a second swing rod and a second pressing rod, the second locking pin is arranged at one end of the second swing rod, the second pressing rod is rotationally arranged at the other end of the swing rod, and the swing rod is rotationally arranged on the fixed ladder, so as to drive the second locking pin to ascend or descend through the vertical action of the second pressing rod, the top end of the movable ladder is provided with a lock piece, the lock piece is provided with a lock hole for inserting the second locking pin, one end of the second pressing rod, away from the second swing rod, penetrates through the movable platform and protrudes from the top surface of the movable platform, and a spring is sleeved on the second pressing rod for resetting the second pressing rod.

[0013] As a further scheme of the utility model, the third locking mechanism comprises a latch fixed to the fixed ladder and a lock catch fixed to the movable ladder, the lock catch is used for being clamped into the latch and being locked with the latch, a joint bearing is hinged on the second pressing rod, one end of the joint bearing, away from the second pressing rod, is hinged with the switch of the latch, so as to drive the switch of the latch to act through the joint bearing when the second pressing rod descends, and the latch is unlocked.

[0014] As a further scheme of the utility model, the side edge of the fixed ladder is rotationally provided with a mounting ring, a handrail is slidably arranged in the mounting ring, and the bottom end of the handrail is hinged with the turnover arm.

[0015] The utility model has the following beneficial effects:

[0016] The device is provided with a fixed platform and a movable platform, and a foldable fixed ladder and a movable ladder are installed at the end of the movable platform away from the fixed platform, when the user needs to get off or get on the vehicle, the movable platform is rotated to rotate the movable platform to the side of the agricultural machine, then the movable ladder is lowered to the unfolded state, at this time, the total height of the movable ladder and the fixed ladder is increased, and the ground clearance of the movable ladder is reduced, the user can climb onto the agricultural machine or get off the agricultural machine through the ladder mechanism, which is convenient for the user to climb, when the ladder needs to be stored, the movable ladder is first raised, so that the movable ladder is converted to the folded state, at this time, the total height of the movable ladder and the fixed ladder is reduced, then the horizontal rotation of the movable platform is performed to rotate the ladder mechanism to the position close to the agricultural machine, the movable platform is rotated to the storage state, at this time, the ladder mechanism does not occupy the side space of the agricultural machine, does not increase the width of the agricultural machine, and does not cause impact on crops, and reduces the risk of damage caused by impact.

[0017] In addition to the purposes, features and advantages described above, the present application has other purposes, features and advantages. The present application will be further described below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application, and are incorporated in and constitute a part of this application. The embodiments of the present application illustrated in the drawings and their descriptions are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0019] Figure 1 The present application is unfolded.

[0020] Figure 2 The present application is folded.

[0021] Figure 3 The structure of the fixed ladder in the present application is shown.

[0022] Figure 4 The structure of the movable ladder in the present application is shown.

[0023] Figure 5 The structure of the folding mechanism in the present application is shown.

[0024] Figure 6 The structure of the second locking mechanism and the third locking mechanism in the present application is shown.

[0025] Figure 7 The structure of the second locking mechanism in the present application is shown.

[0026] Figure 8 The local structure of the second locking mechanism in the present application is shown.

[0027] Figure 9The utility model discloses a first locking mechanism's structural diagram.

[0028] Legend:

[0029] 1, fixed platform, 11, telescopic seat, 12, telescopic pipe, 2, movable platform, 3, fixed ladder, 34, latch, 35, rotating shaft, 331, first step, 332, first side plate, 333, second mounting seat, 334, latch mounting seat, 335, first back plate, 336, third mounting seat, 337, mounting ring, 338, turnover arm pivot, 339, gas support lever pivot, 330, handle, 4, movable ladder, 41, second step, 42, second side plate, 44, lock catch, 45, lock piece, 46, second back plate, 5, folding mechanism, 51, handrail, 52, first turnover arm, 54, second turnover arm, 55, gas support lever, 6, second locking mechanism, 61, second pedal lever, 65, Y-shaped joint, 66, second swing lever, 68, second lock pin, 69, joint bearing, 7, first locking mechanism, 71, first pedal lever, 72, mounting frame, 73, first mounting seat, 75, first swing lever, 76, first lock pin, 8, spring, 81, spring stop column. DETAILED DESCRIPTION

[0030] The embodiments of the utility model will be described in detail below in combination with the drawings, but the utility model can be implemented in multiple different ways limited and covered by the following.

[0031] Please refer to Figures 1-9 The utility model provides a technical scheme: a ladder for agricultural machinery, including fixed platform 1, movable platform 2 and ladder mechanism,

[0032] Fixed platform 1 is fixedly connected with agricultural machinery, and is used for installing movable platform 2 and ladder mechanism on agricultural machinery.

[0033] Movable platform 2 is rotationally arranged at one end of fixed platform 1 around vertical rotating shaft 35, so that movable platform 2 can rotate horizontally to switch between storage state and working state.

[0034] The ladder mechanism includes fixed ladder 3, movable ladder 4 and folding mechanism 5, fixed ladder 3 is fixedly arranged at the end of movable platform 2 away from rotating shaft 35, movable ladder 4 is movably arranged on fixed ladder 3 through folding mechanism 5, so that movable ladder 4 can descend or ascend relative to fixed ladder 3 to switch between unfolded state and folded state.

[0035] By setting the fixed platform 1 and the movable platform 2, and rotating the movable platform 2 at one end of the fixed platform 1, the movable platform 2 can be horizontally rotated, when the user needs to get off or get on the agricultural machine, the movable platform 2 can be rotated to make the ladder mechanism on the movable platform 2 away from the agricultural machine, at this time the movable platform 2 is in a working state, then the movable ladder 4 is lowered to an unfolded state, at this time the total height of the movable ladder 4 and the fixed ladder 3 is increased, and the ground clearance of the movable ladder 4 is reduced, the user can climb onto the agricultural machine or get off the agricultural machine through the ladder mechanism, the rotation of the movable platform 2 makes the ladder mechanism rotate to the side of the agricultural machine, so that the ladder mechanism is away from the agricultural machine, and the movable ladder 4 is lowered to reduce the ground clearance of the movable ladder 4, which facilitates the user to climb, and when the ladder needs to be stored, the movable ladder 4 is first raised, so that the movable ladder 4 is converted to a folded state, at this time the total height of the movable ladder 4 and the fixed ladder 3 is reduced, then the movable platform 2 is horizontally rotated to make the ladder mechanism rotate to a position close to the agricultural machine, at this time the movable platform 2 is in a storage state, in this state the ladder mechanism does not increase the width of the agricultural machine, does not cause impact on crops, and reduces the risk of damage due to impact.

[0036] As shown in Figure 1 some examples, the rotating shaft 35 is arranged below the fixed platform 1, and the top surface of the movable platform 2 is not higher than the bottom surface of the fixed platform 1, so that when the movable platform 2 is horizontally rotated around the rotating shaft 35, the movable platform 2 can be rotated to within the vertical projection range of the fixed platform 1, that is, the movable platform 2 can be rotated below the fixed platform 1;

[0037] By the arrangement position of the rotating shaft 35 and the installation position of the movable platform 2, the top surface of the movable platform 2 is not higher than the bottom surface of the fixed platform 1, so that when the movable platform 2 is rotated to a storage state, the movable platform 2 can be rotated below the fixed platform 1, and the ladder mechanism can be closer to the agricultural machine when the movable platform 2 is in the storage state, so that the space occupancy rate of the movable platform 2, the fixed platform 1 and the ladder mechanism in the horizontal direction is lower when the movable platform 2 is in the storage state, and the storage effect is better.

[0038] As shown in Figure 1 the bottom surface of the fixed platform 1 is fixedly provided with an extension seat 11, the extension seat 11 is slidably provided with an extension pipe 12, and the rotating shaft 35 is arranged at one end of the extension pipe 12 away from the extension seat 11, so that the movable platform 2 is rotatably arranged on the extension pipe 12, and the movable platform 2 and the ladder mechanism can move along the sliding direction of the extension pipe 12;

[0039] By setting the telescopic seat 11 on the bottom surface of the fixed platform 1, the inside of the telescopic seat 11 is a cavity, and the telescopic pipe 12 is slidably arranged in the cavity, and the rotating shaft 35 is fixedly arranged at one end of the telescopic pipe 12 away from the telescopic seat 11. Since the movable platform 2 is rotatably arranged on the rotating shaft 35, the movable platform 2 can be driven to move synchronously by the movement of the telescopic pipe 12, and the ladder climbing mechanism mounted on the movable platform 2 can also move synchronously with the movable platform 2, so that the ladder climbing mechanism can further move away from or close to the agricultural machine, so that the movable space of the ladder climbing mechanism is larger, and the position of the ladder climbing mechanism can be adjusted according to different use environments, thereby increasing the applicability of the whole device.

[0040] Specifically, the folding mechanism 5 includes a turnover arm rotatably arranged on both sides of the fixed ladder 3, and the turnover arm is rotatably arranged on the movable ladder 4 away from the fixed ladder 3. Both sides of the fixed ladder 3 are provided with at least two turnover arms, and the turnover arms are parallel to each other, so that a parallelogram mechanism is formed between the fixed ladder 3, the movable ladder 4 and the turnover arms, and the parallelogram mechanism enables the movable ladder 4 to stably ascend or descend.

[0041] Specifically, as shown in Figure 2 Both sides of the fixed ladder 3 are provided with a first turnover arm 52 and a second turnover arm 54, and one end of the first turnover arm 52 and the second turnover arm 54 away from the fixed ladder 3 is rotatably arranged on the side of the movable ladder 4. The first turnover arm 52, the second turnover arm 54, the fixed ladder 3 and the movable ladder 4 together form a parallelogram mechanism, and the parallelogram mechanism enables the movable ladder 4 to stably ascend or descend. At the same time, after the movable ladder 4 is lowered to the unfolded state, the parallelogram mechanism can ensure the stability of the movable ladder 4, prevent the movable ladder 4 from shaking, and ensure the safety during climbing.

[0042] Specifically, the telescopic pipe 12 is provided with a first locking mechanism 7 for locking the movable platform 2 in the working state or the storage state. In order to ensure the stability of the movable platform 2 in the working state or the storage state, the first locking mechanism 7 is used to lock the movable platform 2 when the movable platform 2 is in the working state or the storage state.

[0043] The fixed ladder 3 is provided with a second locking mechanism 6 for locking the movable ladder 4 in the unfolded state and a third locking mechanism for locking the movable ladder 4 in the folded state. Similarly, in order to ensure the stability of the movable ladder 4 in the unfolded state and the folded state, the second locking mechanism 6 is used to lock the movable ladder 4 in the unfolded state, and the third locking mechanism is used to lock the movable ladder 4 in the folded state, so as to ensure the safe use of the movable ladder 4.

[0044] Specifically, the first locking mechanism 7, the second locking mechanism 6 and the third locking mechanism can all adopt a latch, a latch hole is formed on the corresponding position of the telescopic pipe 12 and the movable platform 2, and the latch hole is aligned and then the latch is inserted to realize the locking of the movable platform 2, a latch hole is formed on the surface of the fixed ladder 3 and the movable ladder 4, and the latch hole formed on the fixed ladder 3 and the movable ladder 4 is aligned and then the latch is inserted to realize the locking of the movable ladder 4, and when it is necessary to unlock, the latch is pulled out from the latch hole to realize the unlocking;

[0045] In the actual working process, after the user leaves the agricultural machine through the ladder, there is no operator on the agricultural machine at this time, so the agricultural machine will not work, the movable platform 2 does not need to be rotated to the storage state, and the movable ladder 4 does not need to be raised to the folded state, only when the user climbs onto the agricultural machine through the ladder and the agricultural machine works, the movable platform 2 needs to be rotated to the storage state, and the ladder needs to be raised to the folded state, that is, it is necessary to facilitate the user to fold the movable ladder 4 on the movable platform 2 or the fixed platform 1 and rotate the movable platform 2;

[0046] Based on the actual use, preferably, the first locking mechanism 7 comprises a first swing lever 75 and a first locking pin 76, the first locking pin 76 is arranged at one end of the first swing lever 75, the telescopic pipe 12 is fixedly provided with a mounting frame 72, the first swing lever 75 is rotatably arranged on the mounting frame 72, so as to drive the first locking pin 76 to rise or fall through the swing lever rotation, the dynamic platform 2 is provided with a locking hole at the corresponding position, and the first locking pin 76 is used for inserting into the locking hole of the dynamic platform 2 to realize the locking of the dynamic platform 2, and the end of the first swing lever 75 away from the first locking pin 76 is rotatably provided with a first stepping lever 71, the top end of the first stepping lever 71 protrudes from the top surface of the fixed platform 1, and a spring 8 for resetting the first stepping lever 71 is sleeved on the first stepping lever 71. Since the first stepping lever 71 is hinged at the end of the first swing lever 75 away from the first locking pin 76, the first stepping lever 71 will drive the first swing lever 75 to rotate when it acts in the vertical direction, so as to drive the first locking pin 76 to act. Since the top end of the first stepping lever 71 protrudes from the top surface of the fixed platform 1, and the first stepping lever 71 can drive the first locking pin 76 to act through the first swing lever 75 when it acts, when it is necessary to unlock the locking of the dynamic platform 2 by the first locking pin 76, only the first stepping lever 71 needs to be stepped by the foot, so that the first stepping lever 71 can drive the first locking pin 76 to rise through the first swing lever 75, and the first locking pin 76 can be separated from the locking hole of the dynamic platform 2. Subsequently, the dynamic platform 2 can freely rotate around the rotating shaft 35, and the spring 8 provided on the first stepping lever 71 is used for resetting the first stepping lever 71. When the user steps on the first stepping lever 71, the spring 8 sleeved on the first stepping lever 71 will be deformed. When the user releases the first stepping lever 71, the spring 8 deformed on the first stepping lever 71 will exert an upward force on the first stepping lever 71 to drive the first stepping lever 71 to rise and reset, so as to make the first locking pin 76 descend and lock the dynamic platform 2 again;

[0047] The first stepping lever 71 can be unlocked by stepping on it to make it descend, which is more convenient for the user to unlock the dynamic platform 2 after climbing onto the agricultural machine, and is more in line with the actual use environment;

[0048] As shown in Figure 9 , the mounting frame 72 is provided with a Y-shaped joint 65, the first swing lever 75 is rotatably connected with the Y-shaped joint 65, and the hinged position of the first swing lever 75 and the Y-shaped joint 65 is located between the first locking pin 76 and the first stepping lever 71, so as to ensure that the first locking pin 76 can act through the first swing lever 75 when the first stepping lever 71 acts;

[0049] As shown in Figure 9 , the bottom end of the first stepping lever 71 is provided with a Y-shaped joint 65, and the first stepping lever 71 is rotatably connected with the first swing lever 75 through the Y-shaped joint 65;

[0050] As shown in Figure 9As shown, the mounting frame 72 is provided with a first mounting seat 73 on one side close to the first stepping lever 71, the bottom end of the spring 8 abuts against the top surface of the first mounting seat 73, the first stepping lever 71 is provided with a spring stop column 81, and the top end of the spring 8 abuts against the spring stop column 81. When the first stepping lever 71 is lowered, the spring 8 is compressed to generate elastic potential energy, so that the spring 8 exerts an upward elastic force on the first stepping lever 71, and the first stepping lever 71 has a tendency to rise upward. After the first stepping lever 71 is hindered from moving away from the top, the first stepping lever 71 can rise and reset under the action of the elastic force of the spring 8.

[0051] Specifically, the first locking pin 76 is fixedly connected with the first swing lever 75, so as to ensure that the first locking pin 76 can be accurately inserted into the locking hole of the movable platform 2 when the first swing lever 75 drives the first locking pin 76 to descend.

[0052] Preferably, the second locking mechanism 6 comprises a second locking pin 68, a second swing lever 66 and a second stepping lever 61. The second locking pin 68 is arranged at one end of the second swing lever 66, the second stepping lever 61 is rotatably arranged at the other end of the swing lever, and the swing lever is rotatably arranged on the fixed ladder 3. The second locking pin 68 is driven to rise or descend by the vertical action of the second stepping lever 61. The top end of the movable ladder 4 is provided with a locking piece 45, and the locking piece 45 is provided with a locking hole for inserting the second locking pin 68. The end of the second stepping lever 61 away from the second swing lever 66 penetrates through the movable platform 2 and protrudes from the top surface of the movable platform 2. A spring 8 is sleeved on the second stepping lever 61 for resetting the second stepping lever 61. When the movable ladder 4 is lowered to the unfolded state, the second locking pin 68 is aligned with the locking hole of the locking piece 45 at the top end of the movable ladder 4. At this time, the second locking pin 68 can enter the locking hole of the locking piece 45 to lock the movable ladder 4, so as to lock the movable ladder 4 in the unfolded state. When it is necessary to unlock the movable ladder 4, the top end of the second stepping lever 61 can be stepped by the foot to make the second stepping lever 61 descend, and then the second swing lever 66 drives the second locking pin 68 to rise and separate from the locking hole of the locking piece 45, so as to realize the unlocking of the second locking mechanism 6. The second locking mechanism 6 can also be unlocked by stepping, which is more convenient in operation and more suitable for actual use environment.

[0053] Specifically, in order to ensure the stability of the second stepping lever 61, a second mounting seat 333 is fixedly arranged on the fixed ladder 3, and the second stepping lever 61 penetrates through the second mounting seat 333 for limiting the horizontal action of the second stepping lever 61. When the second stepping lever 61 drives the second swing lever 66 to rotate, the lower end of the second stepping lever 61 will tilt with the rotation of the second swing lever 66. Therefore, the hole through which the second stepping lever 61 penetrates on the second mounting seat 333 needs to be larger than the size of the second stepping lever 61, so that the second stepping lever 61 has a certain amount of space for movement in the horizontal direction, and the second stepping lever 61 can normally operate.

[0054] The second pedal lever 61 is also provided with a spring stop column 81, and the top end of the spring 8 sleeved on the second pedal lever 61 abuts against the spring stop column 81, and the bottom end of the spring 8 abuts against the second mounting seat 333. When the second pedal lever 61 is lowered, the spring 8 sleeved on the second pedal lever 61 will also be compressed, so that the spring 8 generates elastic force, and then after the top of the second pedal lever 61 is prevented from moving away, the spring 8 sleeved on the second pedal lever 61 will exert upward elastic force on the second pedal lever 61, so that the second pedal lever 61 is upwardly reset;

[0055] As shown in Figures 6-7 , the bottom end of the second pedal lever 61 is also provided with a Y-shaped joint 65, and the second pedal lever 61 is rotationally connected with the second swing arm through the Y-shaped joint 65.

[0056] As shown in Figure 3 , the fixed ladder 3 is provided with a third mounting seat 336, and the second locking pin 68 is inserted into the hole of the third mounting seat 336, so that the third mounting seat 336 horizontally limits the second locking pin 68, so that the second locking pin 68 can only move along the axial direction, so as to ensure that the second locking pin 68 can be smoothly inserted into the lock hole of the lock piece 45, and the spring 8 is sleeved on the second locking pin 68, the top end of the spring 8 abuts against the third mounting seat 336, and the bottom end of the spring 8 abuts against the spring stop column 81 fixed on the second locking pin 68, so that the second locking pin 68 can extrude the spring 8 sleeved on the surface when it is raised upward, so as to help the second locking pin 68 and the second pedal lever 61 reset.

[0057] Specifically, since the second locking pin 68 is inserted into the third mounting seat 336, as shown in Figure 7 , the second locking pin 68 is rotationally connected with the second swing lever 66, and in order to enable the second locking pin 68 to normally move along the axial direction, the second swing lever 66 is provided with a movable slot in the middle, and the second swing lever 66 is connected with the rotating shaft on the surface of the fixed ladder 3 through the movable slot, so that the second swing lever 66 can rotate around the rotating shaft and also can move along the length direction of the movable slot, so as to ensure that the second locking pin 68 moves along the axial direction when the second swing lever 66 rotates, and does not tilt or deviate in other directions, so as to ensure that the second locking pin 68 can be smoothly inserted into the lock hole of the lock piece 45.

[0058] As shown in Figure 7 , the lock piece 45 on the top of the movable ladder 4 is inclined to the horizontal plane, and the end of the lock piece 45 away from the movable ladder 4 is downwardly inclined, so that when the lock piece 45 moves below the second locking pin 68, the second locking pin 68 can be extruded by the inclined surface on the surface of the lock piece 45, so that the second locking pin 68 is raised.

[0059] Preferably, the third locking mechanism comprises a latch 34 fixed to the fixed ladder 3 and a lock catch 44 fixed to the movable ladder 4, the lock catch 44 is used to be clamped into the latch 34 and locked with the latch 34, when it is needed to lock the movable ladder 4 in the folded state, only need to make the lock catch 44 fixed on the movable ladder 4 clamped into the latch 34 fixed on the fixed ladder 3, the lock catch 44 clamped into the latch 34 will not be able to leave the latch 34, so as to realize the locking of the folded state of the movable ladder 4;

[0060] As shown in Figure 6 , the second pedal 61 is hinged with a joint bearing 69, the joint bearing 69 is hinged with the switch of the latch 34 away from the end of the second pedal 61, so as to drive the switch of the latch 34 to act through the joint bearing 69 when the second pedal 61 is lowered, so that the latch 34 is unlocked, when we need to unlock the latch 34, the second pedal 61 can be stepped by foot, the second pedal 61 is lowered to drive the switch of the latch 34 to act through the joint bearing 69, so that the latch 34 is unlocked, at this time the lock catch 44 can be separated from the latch 34, without manual operation, it is more convenient to use.

[0061] As shown in Figure 3 , the fixed ladder 3 is composed of a first pedal 331, a first side plate 332 and a first back plate 35, the first back plate 35 is fixed with the first side plate 332 on both sides, and the first pedal 331 is fixed between the two first side plates 332 and fixedly connected with the first back plate 35, so that the first pedal 331 can disperse the pressure acting on it to the first back plate 35 and the two first side plates 332 when it is stressed, so that the first pedal 331 is more stable when used;

[0062] As shown in Figure 3 , the front end of the first side plate 332 is fixedly provided with a handle 330, which can be held by the user when climbing, providing a supporting position for the user and improving the safety during climbing.

[0063] As shown in Figure 3 , the latch 34 is fixedly arranged on the inner side of one of the two first side plates 332, and the first side plate 332 is provided with a latch mounting seat 334, and the latch 34 is fixedly arranged on the latch mounting seat 334;

[0064] The first back plate 35 is fixedly provided with a swing rod rotating shaft, which is arranged in the movable groove of the second swing rod 66;

[0065] As shown in Figure 4As shown, the movable ladder 4 is composed of a second step 41, a second side plate 42 and a second back plate 46, the two sides of the second back plate 46 are fixedly provided with the second side plate 42, the second step 41 is fixedly arranged between the two second side plates 42 and is fixedly connected with the second back plate 46, so that the second step 41 can disperse the pressure received thereby on the second back plate 46 and the two second side plates 42 when being stressed, so that the second step 41 is more stable when being used;

[0066] As shown in the drawings, Figure 5 As shown, the outer sides of the first side plate 332 and the second side plate 42 are fixedly provided with a turnover arm rotating shaft 338 for mounting the turnover arm;

[0067] Preferably, the outer side of the first side plate 332 is provided with a gas strut rotating shaft 339, the gas strut rotating shaft 339 is rotatably provided with a gas strut 55, and the end of the gas strut 55 away from the gas strut rotating shaft 339 is hingedly connected with the turnover arm, for reducing the speed of the movable ladder 4 when descending, so as to ensure the use safety of the whole device.

[0068] As shown in the drawings, Figure 5 As shown, the side of the fixed ladder 3 is rotatably provided with a mounting ring 337, the mounting ring 337 is slidably provided with a handrail 51, and the bottom end of the handrail 51 is hingedly connected with the turnover arm, after the user climbs onto the movable platform 2, if the movable ladder 4 needs to be raised to the folded state at this time, the handrail 51 can be pulled up, the turnover arm is driven to rotate upward by the handrail 51, so as to drive the movable ladder 4 to rise, so as to facilitate the user to fold the movable ladder 4 on the movable platform 2, and when the movable platform 2 needs to be rotated, the movable platform 2 can also be driven to move by the handrail 51, so that the operation of the movable platform 2 is more convenient.

[0069] The above is only a preferred embodiment of the present application and is not used to limit the present application, for those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An agricultural machine ladder characterized by: It comprises a fixed platform (1), a movable platform (2) and a ladder climbing mechanism; The fixed platform (1) is fixedly connected with the agricultural machine, and is used for mounting the movable platform (2) and the ladder climbing mechanism on the agricultural machine; The movable platform (2) is rotatably arranged at one end of the fixed platform (1) around a vertical rotating shaft (35), so that the movable platform (2) can rotate horizontally. The ladder climbing mechanism comprises a fixed ladder (3), a movable ladder (4) and a folding mechanism (5), the fixed ladder (3) is fixedly arranged at one end of the movable platform (2) away from the rotating shaft (35), the movable ladder (4) is movably arranged on the fixed ladder (3) through the folding mechanism (5), so that the movable ladder (4) can be lowered or raised relative to the fixed ladder (3).

2. The agricultural machine ladder of claim 1, wherein: The top surface of the movable platform (2) is not higher than the bottom surface of the fixed platform (1), so that the movable platform (2) can be rotated to the vertical projection range of the fixed platform (1).

3. The agricultural machine ladder of claim 1, wherein: The bottom surface of the fixed platform (1) is fixedly provided with an extension base (11), the extension base (11) is movably provided with an extension pipe (12), and the rotating shaft (35) is arranged at one end of the extension pipe (12) away from the extension base (11), so that the movable platform (2) is rotatably arranged on the extension pipe (12).

4. The agricultural machine ladder of claim 1, wherein: The folding mechanism (5) comprises a turnover arm rotatably arranged on both sides of the fixed ladder (3), one end of the turnover arm away from the fixed ladder (3) is rotatably arranged on the movable ladder (4), both sides of the fixed ladder (3) are provided with at least two turnover arms, and the turnover arms are parallel to each other, so that a parallelogram mechanism is formed between the fixed ladder (3), the movable ladder (4) and the turnover arms.

5. The agricultural machine ladder of claim 3, wherein: The extension pipe (12) is provided with a first locking mechanism (7) for locking the movable platform (2), and the fixed ladder (3) is provided with a second locking mechanism (6) and a third locking mechanism for locking the movable ladder (4) at different positions.

6. The agricultural machine ladder of claim 5, wherein: The first locking mechanism (7) comprises a first swing rod (75) and a first locking pin (76), the first locking pin (76) is arranged at one end of the first swing rod (75), a mounting frame (72) is fixedly arranged on the extension pipe (12), the first swing rod (75) is rotatably arranged on the mounting frame (72) around a horizontal shaft, so that the first locking pin (76) is raised or lowered by the rotation of the swing rod, a lock hole is formed in the corresponding position of the movable platform (2), and the first locking pin (76) is used for inserting into the lock hole of the movable platform (2) to lock the movable platform (2).

7. The agricultural machine ladder of claim 6, wherein: One end of the first swing rod (75) away from the first locking pin (76) is rotatably provided with a first stepping rod (71), the top end of the first stepping rod (71) protrudes from the top surface of the fixed platform (1), and a spring (8) is sleeved on the first stepping rod (71) to reset the first stepping rod (71).

8. The agricultural machine ladder of claim 5, wherein: The second locking mechanism (6) comprises a second locking pin (68), a second swing lever (66) and a second stepping lever (61), the second locking pin (68) is arranged at one end of the second swing lever (66), the second stepping lever (61) is rotatably arranged at the other end of the swing lever, and the swing lever is rotatably arranged on the fixed ladder (3), so as to drive the second locking pin (68) to rise or fall through the vertical action of the second stepping lever (61), the top end of the movable ladder (4) is provided with a locking piece (45), and the locking piece (45) is provided with a locking hole for inserting the second locking pin (68). The end of the second stepping lever (61) away from the second swing lever (66) penetrates through the movable platform (2) and protrudes from the top surface of the movable platform (2), and the second stepping lever (61) is sleeved with a spring (8) for resetting the second stepping lever (61).

9. The agricultural machine ladder of claim 8, wherein: The third locking mechanism comprises a latch (34) fixed to the fixed ladder (3) and a lock catch (44) fixed to the movable ladder (4), the lock catch (44) is used for being clamped into the latch (34) and being locked with the latch (34), a joint bearing (69) is hinged on the second stepping lever (61), one end of the joint bearing (69) away from the second stepping lever (61) is hinged with the switch of the latch (34), so that when the second stepping lever (61) is lowered, the switch of the latch (34) is driven to move through the joint bearing (69), so that the latch (34) is unlocked.

10. The agricultural machine ladder of claim 4, wherein: The side of the fixed ladder (3) is rotatably provided with a mounting ring (337), the mounting ring (337) is slidably provided with a handrail (51), and the bottom end of the handrail (51) is hinged with the turnover arm.

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