Depth limiting adjustment device
By designing the telescopic buffer and limiting connector in the depth limiting adjustment device, the impact problem when the depth limiting wheel flips is solved, thus protecting the components and reducing maintenance needs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHENGZHOU LONGFENG AGRI MASCH EQUIP MFG CO LTD
- Filing Date
- 2025-09-12
- Publication Date
- 2026-07-31
AI Technical Summary
The current limited-depth rollers lack a buffer device when they are flipped to the limit position, which causes wear or deformation of parts, requiring frequent maintenance or replacement.
A depth limiting adjustment device was designed, including a swing arm, a flipping bracket, a depth limiting wheel, and a depth limiting adjustment mechanism. The device utilizes telescopic buffers and limiting connectors to buffer the impact when the position of the depth limiting wheel changes.
It effectively reduces the impact force when the depth-limiting wheel flips, protects the parts, and reduces maintenance frequency and wear.
Smart Images
Figure CN224571789U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to agricultural machinery, specifically to a depth-limiting adjustment device. Background Technology
[0002] The depth limiter is a crucial component of a moldboard plow. It is typically mounted at the rear or side of the plow frame and its relative height to the plow body limits the depth of the plow blade's penetration. For example, raising the depth limiter increases tillage depth, and lowering it decreases it. Some plows on the market incorporate a depth adjustment plate on the depth limiter's legs. The depth limit is adjusted by changing the position of a pin in the hole on the adjustment plate. The adjustment plate is positioned against the arc-shaped plate of the depth limiter seat to achieve the limit. Each time the adjustment plate is rotated, it impacts the arc-shaped plate. These types of plows, equipped with traditional rigid-connection depth limiters, experience significant impact when rotating to the limit position due to the lack of a buffer. Prolonged exposure to these impacts can lead to wear and deformation of the affected components, requiring frequent maintenance or replacement of damaged parts. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide a depth limiting adjustment device to avoid damage to parts due to the lack of buffer when the depth limiting wheel flips to the limit position.
[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a depth limiting adjustment device, including a swing arm, a tilting bracket, a depth limiting wheel, and a depth limiting adjustment mechanism. The tilting bracket is connected to the swing arm and rotates up and down relative to the swing arm. A depth limiting leg is provided on the tilting bracket, and the depth limiting wheel is installed on the depth limiting leg. The depth limiting adjustment mechanism includes a mounting base, a telescopic buffer, and a limiting connector. The mounting base is connected to the swing arm and rotates up and down relative to the swing arm. The telescopic buffer is provided on the mounting base, and a guide hole is provided on the mounting base through which the limiting connector passes. The guide hole is set and moves up and down relative to the mounting base. A limit support is provided on the mounting base above the limit connector. An anti-disengagement clip is provided on the limit connector above the guide hole. The limit connector is also connected to the depth-limiting leg and rotates up and down relative to the depth-limiting leg. An upper limit part and a lower limit part are provided on the limit connector below the guide hole. A limit member is provided on the telescopic buffer part, located between the upper and lower limit parts. The limit member abuts against the upper and lower limit parts respectively as the depth-limiting leg rotates up and down. Using the depth-limiting adjustment mechanism, a buffering effect is provided when the position of the depth-limiting wheel changes due to the plow body overturning, reducing impact and preventing damage to components.
[0005] As an optional technical solution, the telescopic buffer includes a buffer cylinder, with the rod-side and rodless sides of the cylinder connected by an external connecting pipe. It eliminates the need to connect to the tractor's hydraulic system, achieving adaptive buffering through the amount of oil inside the buffer cylinder and the size of the piston's damping orifice.
[0006] As an optional technical solution, a support shaft is provided on the depth-limiting leg, and a lower limit part is located at the bottom end of the limiting connector. The lower limit part is connected to the support shaft and rotates relative to the support shaft, while the upper limit part can move and adjust along the limiting connector. The upper limit part is adjustable, thereby adjusting the depth limit.
[0007] As an optional technical solution, the lower limit part includes a U-shaped buckle and a locking pin. The support shaft passes through the U-shaped buckle, and the locking pin is set on the U-shaped buckle and fastens the support shaft inside the U-shaped buckle.
[0008] As an optional technical solution, the limiting connector includes two parallel limiting rods, the telescopic part of the telescopic buffer is between the two limiting rods, and at least one through hole suitable for connecting the limiting part is provided on the limiting rod along the rod length direction.
[0009] As an optional technical solution, the upper limit part includes a limit slider and a limit pin. The limit slider moves along the length direction of the limit rod and is connected to the two limit rods through the limit pin.
[0010] As an optional technical solution, the limiting component is provided with a slot, the limiting rod cooperates with the slot, and the limiting component moves and adjusts along the limiting rod.
[0011] As an optional technical solution, the swing arm is provided with a first rotating shaft and a second rotating shaft. The first rotating shaft and the second rotating shaft are connected to the swing arm and rotate relative to the swing arm. The first rotating shaft and the second rotating shaft are parallel. The flip bracket is connected to the first rotating shaft, and the mounting base is connected to the second rotating shaft.
[0012] As an optional technical solution, the swing arm is equipped with a plow body connecting part.
[0013] Compared with the prior art, the present invention has the following advantages: 1. The limiting connector and the depth limiting leg are rotatably connected. The limiting connector passes through the guide hole on the mounting base, and the mounting base can rotate relative to the swing arm. The telescopic buffer is set on the mounting base, and the limiting part of the telescopic buffer is between the upper limit part and the lower limit part. When the depth limiting wheel descends, the upper limit part and the limiting part abut against each other, causing the telescopic buffer to extend and play a buffering role. When the depth limiting wheel rises, the lower limit part and the limiting part abut against each other, causing the telescopic buffer to shorten and play a buffering role. This effectively avoids the impact that would occur when the depth limiting wheel flips to the limiting position, thus preventing damage to the components; 2. The upper limit part can be moved and adjusted relative to the limiting connector, thereby adjusting the timing of the telescopic buffer's buffering effect and realizing the adjustment of the depth limiting buffering degree. Attached Figure Description
[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0015] Figure 1 This is a schematic diagram of the depth limiting adjustment device; Figure 2 for Figure 1 Structural diagram omitting the depth-limiting wheel; Figure 3 This is a schematic diagram of the depth-limiting adjustment mechanism; Figure 4 This is a structural schematic diagram of the limiting connector; In the diagram: 1. Swing arm, 2. Tilting bracket, 3. Depth limiting wheel, 4. Depth limiting leg, 5. Mounting base, 6. Telescopic buffer, 7. Limiting connector, 8. Upper limit part, 9. Lower limit part, 10. Limiting component, 11. Support shaft, 12. Plow body connecting part. Detailed Implementation
[0016] 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. Example
[0017] like Figures 1-4 As shown, a depth limiting adjustment device includes a swing arm 1, a tilting bracket 2, a depth limiting wheel 3, and a depth limiting adjustment mechanism. The swing arm 1 is provided with a plow body connecting part 12 for connecting the plow body. The plow body connecting part 12 is preferably a clamp-type connecting structure. The swing arm 1 is provided with a first shaft tube and a second shaft tube. The first shaft tube and the second shaft tube are parallel to each other and staggered. A first rotating shaft is provided inside the first shaft tube. The first rotating shaft is connected to the first shaft tube through a bearing structure and can rotate relative to the swing arm 1. A second rotating shaft is provided inside the second shaft tube. The second rotating shaft is connected to the second shaft tube through a bearing structure and can rotate relative to the swing arm 1.
[0018] The flip-up bracket 2 is connected to the first rotating shaft. Since the first rotating shaft is rotatably mounted, the flip-up bracket 2 can be adjusted up and down relative to the swing arm 1. The flip-up bracket 2 is provided with a depth-limiting leg 4, and the depth-limiting leg 4 is provided with a depth-limiting wheel 3. The flip-up bracket 2, the depth-limiting leg 4, and the depth-limiting wheel 3 are existing technology products and will not be described in detail in this patent. The depth-limiting leg 4 is also provided with a support shaft 11, which is suitable for use with the depth-limiting adjustment mechanism to achieve connection and buffering.
[0019] The depth adjustment mechanism includes a mounting base 5, a telescopic buffer 6, and a limiting connector 7. The mounting base 5 is connected to the second rotating shaft. Since the second rotating shaft can rotate relative to the swing arm 1, the mounting base 5 can rotate relative to the swing arm 1 for adjustment. The telescopic buffer 6 is mounted on the mounting base 5 and includes a buffer cylinder. The buffer cylinder adopts existing hydraulic cylinder products and is equipped with a connecting pipe that connects the rod chamber and the rodless chamber of the buffer cylinder. The buffer cylinder can achieve the buffering effect without being connected to the hydraulic control system of the tractor or other types of traction vehicles. The buffering effect of the buffer cylinder is determined by the size of the damping orifice of the piston of the buffer cylinder and the amount of hydraulic oil inside the buffer cylinder. The cylinder body of the telescopic cylinder is connected to the mounting base 5, and the telescopic part of the telescopic cylinder extends to the bottom of the mounting base 5.
[0020] The mounting base 5 is also provided with a guide hole. The limiting connector 7 passes through the guide hole and can move up and down relative to the mounting base 5. The mounting base 5 is provided with a limiting support above the limiting connector 7. The limiting support is used to limit the upward movement distance of the limiting connector 7 and to support the limiting connector 7. The limiting connector 7 is also provided with an anti-detachment clip above the guide hole. The anti-detachment clip cannot pass through the guide hole and is used to prevent the limiting connector 7 from detaching from the mounting base 5. The limiting connector 7 is connected to the depth limiting leg 4 and can rotate relative to the depth limiting leg 4. When adjusting the height of the depth limiting wheel 3, the depth limiting leg 4 rotates up and down relative to the swing arm 1, causing the included angle between the limiting connector 7 and the depth limiting leg 4 to change and causing the limiting connector 7 to move up and down.
[0021] The limiting connector 7 has an upper limit part 8 and a lower limit part 9 below the guide hole. The telescopic buffer 6 has a limiting part 10 on its telescopic part. The limiting part 10 is located between the upper limit part 8 and the lower limit part 9. During the process of the limiting connector 7 being moved and flipped by the limiting leg, the limiting part 10 abuts against the upper limit or lower limit part 9, causing the telescopic buffer 6 to expand and contract, thereby enabling the telescopic buffer 6 to play a buffering role.
[0022] The lower limit part 9 is located at the bottom end of the limiting connector 7. The limiting connector 7 is connected to the support shaft 11 through the lower limit part 9, and the lower limit part 9 can rotate relative to the support shaft 11. Specifically, the lower limit part 9 includes a U-shaped buckle and a locking pin. The U-shaped buckle is provided with a hole suitable for the locking pin to pass through. The support shaft 11 passes through the U-shaped buckle from the side. After the locking pin is inserted into the hole, the locking pin locks the support shaft 11 in the U-shaped buckle. The locking pin can prevent the limiting buffer from moving axially and causing the support shaft 11 to disengage from the opening of the U-shaped buckle.
[0023] The upper limit part 8 is detachably connected to the limiting connector 7. The upper limit part 8 can be adjusted by moving along the axial direction of the limiting connector 7 to adjust the depth limit. Specifically, the limiting connector 7 includes two limiting rods, which are parallel to each other and connected by a U-shaped plate or other structural form. The mounting base 5 is provided with two guide holes, through which the two limiting rods pass respectively. Each of the two limiting rods is provided with an anti-detachment clip above the guide holes. The mounting base 5 is provided with a limiting top support above the two limiting rods. The limiting top support is a plate-shaped or block-shaped structure. Each limiting rod has at least one through hole distributed along its length. The through hole is used for the installation and connection of the upper limiting part 8. The upper limiting part 8 includes a limiting slider and a limiting pin. The limiting slider is placed between the two limiting rods and can move and adjust along the limiting rods. The limiting slider is also provided with a through hole. The limiting pin passes through the through hole on the limiting slider and the corresponding through holes of the two limiting rods, thereby fixing the limiting slider. The limiting pin can be provided with an anti-detachment hole, and an anti-detachment pin can be inserted into the anti-detachment hole to prevent the limiting pin from falling off.
[0024] The limiting member 10 is preferably plate-shaped, and the limiting member 10 is provided with two slots. The shape of the slots is adapted to the shape of the limiting rod. The two limiting rods cooperate with the two slots respectively, so that the direction of the limiting connecting member 7 moving up and down is parallel to the direction of the telescopic buffer member 6.
[0025] The limit rod can also be in the form of a long strip.
[0026] During the plow body's overturning process, the depth limiting wheel 3 descends, causing the depth limiting leg 4 to rotate downwards relative to the swing arm 1. Simultaneously, this causes the limiting connector 7 to move downwards, and the mounting base 5 also rotates relative to the swing arm 1. Ultimately, the upper limiting part 8 and the limiting member 10 come into contact. At this point, if the depth limiting wheel 3 continues to descend, the telescopic buffer 6 will extend, providing a cushioning effect. Conversely, if the depth limiting wheel 3 rises, the depth limiting leg 4 will rotate upwards relative to the swing arm 1. Simultaneously, this causes the limiting connector 7 to move upwards, and the mounting base 5 also rotates relative to the swing arm 1. Ultimately, the lower limiting part 9 and the limiting member 10 come into contact. If the depth limiting wheel 3 continues to rise, the telescopic buffer 6 will shorten, providing a cushioning effect. Finally, in the working state, the top of the limiting connector 7 comes into contact with the limiting top support on the mounting base 5 for support. By changing the position of the upper limiting part 8 on the limiting connector 7, the depth can be adjusted. The telescopic buffer 6 can also be equipped with a limiting block. The limiting block cooperates with the mounting base 5 or the swing arm 1 to limit the rotation angle of the mounting base 5 and avoid interference between the depth limiting adjustment mechanism and the depth limiting leg 4.
[0027] In this specification, the terms "an embodiment," "example," "specific example," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0028] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A depth limiting adjustment device characterized by: The device includes a swing arm (1), a tilting bracket (2), a depth limiting wheel (3), and a depth limiting adjustment mechanism. The tilting bracket (2) is connected to the swing arm (1) and rotates up and down relative to the swing arm (1). A depth limiting leg (4) is provided on the tilting bracket (2), and the depth limiting wheel (3) is installed on the depth limiting leg (4). The depth limiting adjustment mechanism includes a mounting base (5), a telescopic buffer (6), and a limiting connector (7). The mounting base (5) is connected to the swing arm (1) and rotates up and down relative to the swing arm (1). The telescopic buffer (6) is provided on the mounting base (5), and a guide hole is provided on the mounting base (5). The limiting connector (7) passes through the guide hole and rotates up and down relative to the mounting base (5). The movable mounting base (5) is provided with a limiting top support above the limiting connector (7). The limiting connector (7) is provided with an anti-disengagement clip above the guide hole. The limiting connector (7) is also connected to the depth limiting leg (4) and rotates up and down relative to the depth limiting leg (4). The limiting connector (7) is provided with an upper limit part (8) and a lower limit part (9) below the guide hole. The telescopic buffer (6) is provided with a limiting part (10). The limiting part (10) is between the upper limit part (8) and the lower limit part (9). The limiting part (10) abuts against the upper limit part (8) and the lower limit part (9) respectively as the depth limiting leg (4) rotates up and down.
2. A depth limiting adjustment device according to claim 1, wherein: The telescopic buffer (6) includes a buffer cylinder, the rod chamber and the rodless chamber of the buffer cylinder are connected by an external connecting pipe.
3. A depth limiting adjustment device according to claim 2, wherein: The depth-limiting leg (4) is provided with a support shaft (11), and the lower limit part (9) is provided at the bottom of the limit connector (7). The lower limit part (9) is connected to the support shaft (11) and rotates relative to the support shaft (11). The upper limit part (8) can move and adjust along the limit connector (7).
4. The depth limiting adjustment device according to claim 3, characterized in that: The lower limit part (9) includes a U-shaped buckle and a locking pin. The support shaft (11) is inserted into the U-shaped buckle, and the locking pin is set on the U-shaped buckle and fastens the support shaft (11) into the U-shaped buckle.
5. A depth limiting adjustment device according to claim 3, wherein: The limiting connector (7) includes two parallel limiting rods, and the telescopic buffer (6) has a telescopic part between the two limiting rods. The limiting rods have at least one through hole along the rod length direction suitable for connecting to the upper limiting part (8).
6. A depth limiting adjustment device according to claim 5, wherein: The upper limit part (8) includes a limit slider and a limit pin. The limit slider moves along the length of the limit rod and is connected to the two limit rods through the limit pin.
7. A depth limiting device according to claim 5, wherein: The limiting member (10) is provided with a slot, the limiting rod cooperates with the slot, and the limiting member (10) moves and adjusts along the limiting rod.
8. A depth limiting adjustment device according to claim 5, wherein: The swing arm (1) is provided with a first rotating shaft and a second rotating shaft. The first rotating shaft and the second rotating shaft are connected to the swing arm (1) and rotate relative to the swing arm (1). The first rotating shaft and the second rotating shaft are parallel. The flip bracket (2) is connected to the first rotating shaft, and the mounting base (5) is connected to the second rotating shaft.
9. A depth limiting device according to claim 5, wherein: The swing arm (1) is provided with a plow body connecting part (12).