Rear supporting plate automatic lifting mechanism for agricultural machinery

Abstract

The utility model discloses an automatic rear supporting plate lifting mechanism for agricultural machinery, which comprises a rear supporting plate, a support frame and lifting mechanisms mounted on two sides of the support frame and symmetrically arranged, two ends of the rear supporting plate are fixedly connected with rotating shafts, the rear supporting plate is rotatably connected to the rear part of a rotary cultivator through the rotating shafts, and the support frame is fixedly connected to the rotary cultivator; the lifting mechanism comprises a hydraulic cylinder pivoted to the supporting frame, a first connecting base fixedly connected to the main beam, an extension rod pivoted to the first connecting base, a second connecting base fixedly connected to the extension rod, a third connecting base fixed to the top face of the rear supporting plate, and a third connecting base fixed to the top face of the rear supporting plate. And one end, far away from the extension rod, of the connecting rod is pivoted with the third connecting seat. The rear supporting plate can be driven to rotate upwards or downwards by controlling the hydraulic cylinder to work, so that the distance between the bottom of the rear supporting plate and the land is adjusted.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery technology, specifically to an automatic lifting mechanism for the rear pallet of agricultural machinery. Background Technology

[0002] Rotary tillers use the power output of a tractor to drive the blade shaft to rotate. The blades cut into the soil tangentially, breaking up clods and throwing them backward, while simultaneously covering the surface weeds or stubble, achieving integrated tillage, soil breaking, and leveling. When a rotary tiller is operating, the blades are rotating and turning the soil, and some soil may be thrown behind. Therefore, a rear support plate is needed to block the soil, prevent splashing, and protect the operator or the equipment behind. However, the current rear support plates have the following main problems: (1) The rear support plate is fixedly installed on the rotary tiller, and its angle cannot be adjusted, that is, the distance between the bottom of the rear support plate and the ground is not adjustable; (2) After the rotary tiller blades turn the soil, the turned-out soil may be in clumps and protrude upward, causing the ground to be uneven and hindering the operation of the rotary tiller. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides an automatic lifting mechanism for the rear pallet of agricultural machinery, which solves the problems mentioned in the background art, such as the inability to adjust the angle of the rear pallet and the inability to loosen the turned-out soil in a timely manner.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0005] An automatic lifting mechanism for a rear support plate in agricultural machinery, wherein the agricultural machinery is a rotary tiller, the rotary tiller includes a gearbox, main beams connected to both sides of the gearbox, and a secondary beam provided at the rear of the main beams; the automatic lifting mechanism for the rear support plate includes a rear support plate, a support frame, and lifting mechanisms installed on both sides of the support frame and symmetrically arranged; the two ends of the rear support plate are fixedly connected to a rotating shaft, and the rear support plate is rotatably connected to the rear of the rotary tiller through the rotating shaft; the support frame is fixedly connected to the rotary tiller; the lifting mechanism includes a hydraulic cylinder pivotally connected to the support frame, a first connecting seat fixedly connected to the main beam, an extension rod pivotally connected to the first connecting seat, and a second connecting seat fixedly connected to the extension rod; the telescopic end of the hydraulic cylinder is pivotally connected to the second connecting seat; the lifting mechanism also includes a third connecting seat fixed to the top surface of the rear support plate; a connecting rod is pivotally connected to the end of the extension rod away from the main beam, and the end of the connecting rod away from the extension rod is pivotally connected to the third connecting seat; a soil loosening part is detachably connected to the bottom of the rear support plate.

[0006] Preferably, the support frame includes a first support rod, a second support rod fixedly connected to both sides of the upper part of the first support rod, and a third support rod fixedly connected to both sides of the first support rod. The first support rod is fixedly connected to the gearbox, and the two second support rods are fixedly connected to the sub-beam. The first support rod and the second support rods form a triangular support, and the hydraulic cylinder is pivotally connected to the third support rod.

[0007] With the above technical solution, both the first support rod and the second support rod are fixedly installed on the rotary tiller, and the second support rod and the first support rod are arranged in a triangular pattern, which improves stability.

[0008] Preferably, the upper two ends of the rear support plate are fixedly connected to the supports, and the supports are pivotally connected to the guide rods. A fourth connecting seat is fixedly connected to the main beam, and a sleeve is rotatably connected to the fourth connecting seat. The guide rods are movably inserted into the sleeves. Limiting plates are fixedly connected to both sides of the guide rods located on the sleeves, and springs are sleeved on the outer walls of the guide rods located between the sleeves and the two limiting plates.

[0009] With the above technical solution, when the rear support plate rotates, the guide rod will slide inside the sleeve, and drive the sleeve to rotate inside the fourth connecting seat through the guide rod, thereby making the rear support plate more stable when rotating.

[0010] Preferably, the rear support plate is S-shaped and has screw holes at its bottom. The soil loosening part includes a mounting plate and several triangular toothed plates fixed on the mounting plate. The mounting plate is fixed to the bottom of the rear support plate by bolts.

[0011] With the above technical solution, if the soil is hard, there will be protruding soil clods on the ground after tilling. Therefore, a soil loosening part can be installed on the rear support plate. After tilling, by controlling the rear support plate to descend, the toothed plate will contact the ground. The toothed plate can break up the soil clods, thus loosening the soil and reducing the height of the soil clods, thereby reducing the impact on the rotary tiller.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] (1) By controlling the operation of the hydraulic cylinder, the rear support plate can be rotated up or down, thereby adjusting the distance between the bottom of the rear support plate and the soil. For example, when adjusting the working depth of the blades, the height of the rear support plate is related to the depth of the blades in the soil. When the rear support plate is lowered, the rear of the machine sinks down and the blades penetrate the soil more deeply, and vice versa. Therefore, users can adjust the tillage depth as needed.

[0014] (2) If the soil is hard, there will be protruding soil clods after tilling. Therefore, a soil loosening part is installed on the rear support plate. After tilling, the toothed plate is lowered to make contact with the ground. The toothed plate can break up the soil clods, loosen the soil, and reduce the height of the soil clods, thus reducing the impact of the soil clods on the rotary tiller. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the present invention;

[0016] Figure 2 This is a schematic diagram of the rear support plate;

[0017] In the diagram: 1-Gearbox, 2-Main beam, 3-Sub-beam, 4-Rear support plate, 5-Support frame, 501-First support rod, 502-Second support rod, 503-Third support rod, 6-Lifting mechanism, 601-Hydraulic cylinder, 602-First connecting seat, 603-Extension rod, 604-Second connecting seat, 605-Third connecting seat, 7-Rotating shaft, 8-Soil loosening part, 801-Mounting plate, 802-Gear plate, 9-Support, 10-Guide rod, 11-Fourth connecting seat, 12-Sleeve, 13-Limiting plate, 14-Spring. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Example 1

[0020] Please see Figures 1-2 An automatic lifting mechanism for the rear pallet of an agricultural machine is disclosed. The agricultural machine is a rotary tiller. The rotary tiller includes a reduction gearbox 1. Main beams 2 are fixedly connected to both sides of the reduction gearbox 1. A secondary beam 3 is provided on the rear side of the main beam 2. A drive shaft is rotatably connected to the main beam through a rotary bearing and is connected to the gear transmission mechanism in the reduction gearbox 1. Both ends of the main beam 2 and the secondary beam 3 are fixedly connected to the rotary tiller. How the gear transmission mechanism drives the drive shaft to rotate is existing technology and will not be described in detail in this embodiment.

[0021] The automatic lifting mechanism for the rear support plate includes a rear support plate 4, a support frame 5, and lifting mechanisms 6 symmetrically arranged on both sides of the support frame 5. The support frame 5 is fixedly connected to the rotary tiller. The support frame 5 includes a first support rod 501, a second support rod 502 fixedly connected to both sides of the upper part of the first support rod, and a third support rod 503 fixedly connected to both sides of the first support rod. The first support rod 501 is fixedly connected to the gearbox 1, and the two second support rods 502 are fixedly connected to the sub-beam 3. The first support rod 501 and the second support rods 502 form a triangular support, which improves the overall stability of the support frame.

[0022] The rear support plate 4 is fixedly connected to the two ends of the rotating shaft 7. The rear support plate 4 is rotatably connected to the rear of the rotary tiller through the rotating shaft 7, so that the rotary tiller's cutter shaft and blades are located in front of and below the rear support plate 4, which is used to block the soil, prevent splashing, and protect the operator or the equipment behind.

[0023] The lifting mechanism 6 includes a hydraulic cylinder 601 pivotally connected to the third support rod 503, a first connecting seat 602 fixedly connected to the main beam, an extension rod 603 pivotally connected to the first connecting seat, and a second connecting seat 604 fixedly connected to the extension rod. The telescopic end of the hydraulic cylinder 601 is pivotally connected to the second connecting seat 604. The lifting mechanism 6 also includes a third connecting seat 605 fixed to the top surface of the rear support plate 4. A connecting rod 606 is pivotally connected to the end of the extension rod 603 away from the main beam, and the end of the connecting rod 606 away from the extension rod is pivotally connected to the third connecting seat 605. By controlling the operation of the hydraulic cylinder 601, the extension rod 603 can be driven to swing up and down, thereby driving the rear support plate 4 to rotate through the connecting rod 606, so as to adjust the angle and height of the rear support plate 4.

[0024] The rear support plate 4 is fixedly connected to two supports 9 at its upper ends. A guide rod 10 is pivotally connected to the supports 9. A fourth connecting seat 11 is fixedly connected to the main beam 2. A sleeve 12 is rotatably connected to the fourth connecting seat 11. The guide rod 10 is movably inserted into the sleeve 12. Limiting plates 13 are fixedly connected to both sides of the guide rod 10 on the sleeve. Springs 14 are sleeved on the outer wall of the guide rod 10 between the sleeve and the two limiting plates. When the rear support plate 4 rotates, the guide rod 10 slides inside the sleeve 12 and drives the sleeve 12 to rotate inside the fourth connecting seat 11, thereby making the rotation of the rear support plate 4 more stable.

[0025] The working principle of this embodiment is as follows: by controlling the hydraulic cylinder 601, the rear support plate 4 is rotated up or down, thereby adjusting the distance between the bottom of the rear support plate 4 and the soil. For example, when adjusting the working depth of the blades, the height of the rear support plate is related to the depth of the blades in the soil. When the rear support plate is lowered, the rear of the machine sinks down, and the blades penetrate the soil more deeply; conversely, when it is raised, the blades penetrate the soil less deeply. Therefore, users can adjust the tillage depth as needed.

[0026] Example 2

[0027] Based on Embodiment 1, the bottom of the rear support plate 4 is detachably connected to a soil loosening part 8. The rear support plate 4 is S-shaped and has screw holes at its bottom. The soil loosening part 8 includes a mounting plate 801 and several triangular toothed plates 802 fixed to the mounting plate. The mounting plate 801 is fixed to the bottom of the rear support plate 4 by bolts.

[0028] If the soil is hard, there will be protruding clods on the ground after tilling. Therefore, a soil loosening part 8 is installed on the rear support plate 4. After tilling, the rear support plate 4 is rotated downwards to make the toothed plate 802 contact the ground. The toothed plate 802 can break up the soil clods, loosen the soil, and reduce the height of the soil clods, thus reducing the impact of the soil clods on the rotary tiller.

[0029] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic lifting mechanism for the rear pallet of agricultural machinery, wherein the agricultural machinery is a rotary tiller, the rotary tiller includes a reduction gearbox (1), main beams (2) are connected to both sides of the reduction gearbox (1), and a secondary beam (3) is provided on the rear side of the main beams (2), characterized in that: The automatic lifting mechanism of the rear support plate includes a rear support plate (4), a support frame (5), and lifting mechanisms (6) installed on both sides of the support frame (5) and symmetrically arranged. The two ends of the rear support plate (4) are fixedly connected to a rotating shaft (7). The rear support plate (4) is rotatably connected to the rear of the rotary tiller through the rotating shaft (7). The support frame (5) is fixedly connected to the rotary tiller. The lifting mechanism (6) includes a hydraulic cylinder (601) pivotally connected to the support frame, a first connecting seat (602) fixedly connected to the main beam, and a mechanism pivotally connected to the first connecting seat. The extension rod (603) is fixedly connected to the extension rod, and the extension end of the hydraulic cylinder (601) is pivotally connected to the second connecting seat (604). The lifting mechanism (6) also includes a third connecting seat (605) fixed to the top surface of the rear support plate (4). The end of the extension rod (603) away from the main beam is pivotally connected to a connecting rod (606), and the end of the connecting rod (606) away from the extension rod is pivotally connected to the third connecting seat (605). The bottom of the rear support plate (4) is detachably connected to a soil loosening part (8).

2. The automatic lifting mechanism of the rear support plate of an agricultural machine according to claim 1, characterized in that: The support frame (5) includes a first support rod (501), a second support rod (502) fixedly connected to both sides of the upper part of the first support rod, and a third support rod (503) fixedly connected to both sides of the first support rod. The first support rod (501) is fixedly connected to the gearbox (1), and the two second support rods (502) are fixedly connected to the sub-beam (3). The first support rod (501) and the second support rod (502) form a triangular support, and the hydraulic cylinder (601) is pivotally connected to the third support rod (503).

3. The automatic lifting mechanism of the rear support plate of an agricultural machine according to claim 2, characterized in that: The upper two ends of the rear support plate (4) are fixedly connected to the support (9), and the support (9) is pivotally connected to the guide rod (10). The main beam (2) is fixedly connected to the fourth connecting seat (11), and the fourth connecting seat (11) is rotatably connected to the sleeve (12). The guide rod (10) is movably inserted into the sleeve (12).

4. The automatic lifting mechanism of the rear support plate of an agricultural machine according to claim 3, characterized in that: Limiting plates (13) are fixedly connected to both sides of the guide rod (10) located on both sides of the sleeve, and springs (14) are sleeved on the outer wall of the guide rod (10) located between the sleeve and the two limiting plates.

5. The automatic lifting mechanism of the rear support plate of an agricultural machine according to claim 4, characterized in that: The rear support plate (4) is S-shaped and has screw holes at its bottom. The loosening part (8) includes a mounting plate (801) and several triangular toothed plates (802) fixed on the mounting plate. The mounting plate (801) is fixed to the bottom of the rear support plate (4) by bolts.

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