A fence-type rake with resilient tines
By using flexible rake teeth design and magnetic buffer technology, the problems of collision deformation and uneven hay strips in traditional fence-type hay rakes have been solved, achieving efficient hay strip forming and reducing adhesion between teeth, thus improving the operating performance and reliability of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LIAONING ZHONGXIN KEMAI AGRICULTURAL MACHINERY MANUFACTURING CO LTD
- Filing Date
- 2025-06-20
- Publication Date
- 2026-06-16
AI Technical Summary
The rigid fingers of traditional fence-type hay rakes are prone to deformation or breakage when they collide with obstacles, and the hay strips are uneven in thickness when operating in fields with a slope greater than 8°, and the teeth stick together severely when working with wet hay.
It adopts an elastic rake tooth design and uses the principle of like poles repulsion of double ring magnets to build a non-contact buffer layer. Combined with the parallel four-bar mechanism of hydraulic push rod and I-shaped connecting rod, it can realize the ±30° precise adjustment of the rake teeth and magnetic buffering, and has the dual characteristics of high rigidity support and low rigidity buffering.
Under a 1500N impact load, the energy is reduced by 65%, the response time is shortened by 80%, the tooth tip ground pressure deviation is less than 5% when operating in fields with a slope of ≤15°, the uniformity of grass strip thickness reaches 95%, and the frequency of tooth adhesion is reduced when operating wet grass.
Smart Images
Figure CN224356719U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of fence-type hay rakes, specifically a fence-type hay rake with elastic rake teeth. Background Technology
[0002] Traditional fence-type hay rakes employ a rigid finger structure, which faces the following technical bottlenecks in hay harvesting operations: When the rigid fingers impact obstacles such as rocks and tree roots at a speed of 3-5 m / s, the single impact force reaches 1500N, causing the finger ends to bend and deform by more than 10mm, resulting in frequent breakage and high maintenance costs; when operating in fields with a slope greater than 8°, the rigid structure cannot adhere to the ground, the uniformity of hay strip thickness is only 65%, and the soil content increases by 27%; under wet hay conditions, the teeth stick together severely. In view of these issues, this project was developed through in-depth research. Utility Model Content
[0003] To achieve the above objectives, this utility model is implemented through the following technical solution: a fence-type hay rake with elastic hay-raking teeth, comprising: a fence-type support, multiple hay-raking teeth, and an adjustable hay-raking structure, wherein the multiple hay-raking teeth are inserted into the fence-type support via shafts, and the adjustable hay-raking structure is connected to the fence-type support and the multiple hay-raking teeth, wherein the adjustable hay-raking structure includes: a pair of horizontal telescopic blocks, a pair of horizontal telescopic hydraulic push rods, two pairs of concave bearing blocks, a pair of I-shaped connecting rods, toothed lifting arc blocks, and multiple angle adjustment components;
[0004] The fence-type bracket has a pair of horizontal telescopic convex grooves. A pair of horizontal telescopic blocks are respectively movably inserted into the inner side of the pair of horizontal telescopic convex grooves. A pair of horizontal telescopic hydraulic push rods are respectively installed on the inner side of the pair of horizontal telescopic convex grooves. Two pairs of concave bearing blocks are respectively installed on the pair of horizontal telescopic blocks and the toothed lifting arc block. A pair of I-shaped connecting rods are respectively installed on the two pairs of concave bearing blocks. Multiple angle adjustment components are installed on the fence-type bracket. The toothed lifting arc block is movably inserted into the multiple angle adjustment components.
[0005] Preferably, the angle adjustment assembly includes: an arc-shaped shaft tube, an arc-shaped telescopic block, an arc-shaped shaft rod, an adjusting arc block, a pair of circular magnets, and an angle bearing block;
[0006] The arc-shaped shaft tube is mounted on the fence-type bracket. The adjusting arc block is movably inserted into the inner side of the arc-shaped shaft tube. The arc-shaped shaft tube has a lifting arc groove. The toothed lifting arc block is movably inserted into the inner side of the lifting arc groove and is connected to the adjusting arc block. The arc telescopic block is movably inserted into the inner side of the arc-shaped shaft tube. The arc shaft rod is mounted on the arc telescopic block. The angle bearing block is mounted on the grass-raking teeth and is mounted on the arc shaft rod via a bushing. A pair of circular magnets are respectively mounted on the arc telescopic block and the adjusting arc block.
[0007] Preferably, the plurality of arc telescopic blocks and the plurality of adjusting arc blocks are formed on spherical arcs, and telescopic balls are provided on the inner side of the plurality of spherical arcs.
[0008] Preferably, a pair of horizontal telescopic blocks are provided with fixing bolts.
[0009] Preferably, a pair of horizontal telescopic convex grooves are provided with multiple threaded grooves.
[0010] Preferably, the fence-type bracket and the toothed lifting arc block are provided with auxiliary tension rods.
[0011] Beneficial effects
[0012] This utility model provides a fence-type hay rake with elastic rake teeth. It offers the following advantages: This fence-type hay rake with elastic rake teeth achieves a revolutionary improvement in operational performance through the innovative integration of magnetic buffering technology and a precision adjustment system. A non-contact buffer layer is constructed using the principle of like poles repulsion of double-ring magnets, achieving 65% energy attenuation under a 1500N impact load. The response time is shortened by 80% compared to traditional spring buffers, combining the dual characteristics of initial high-stiffness support (≥500N / mm) and low-stiffness buffering after deformation (≤80N / mm). A parallel four-bar linkage mechanism composed of hydraulic push rods and I-shaped connecting rods enables precise ±30° adjustment of the toothed lifting arc block. Combined with an independent suspension design, this ensures that when operating on a 15° slope field, the tooth-end ground pressure deviation is <5%, the hay strip thickness uniformity reaches 95%, and the effective working time is significantly increased. This technical solution perfectly balances equipment durability, operational quality, and ease of maintenance, marking a new stage of intelligent and flexible operation for fence-type hay rakes. Attached Figure Description
[0013] Figure 1 This is a three-dimensional cross-sectional view of a fence-type hay rake with elastic rake teeth as described in this utility model.
[0014] Figure 2 This is a front view schematic diagram of a fence-type hay rake with elastic rake teeth according to the present invention.
[0015] Figure 3 This is a left sectional view of a fence-type hay rake with elastic rake teeth according to the present invention.
[0016] Figure 4 This is a right-side cross-sectional view of a fence-type hay rake with elastic rake teeth according to the present invention.
[0017] In the diagram: 1. Fence-type bracket; 2. Horizontal telescopic block; 3. Horizontal telescopic hydraulic push rod; 4. Concave bearing block; 5. I-shaped connecting rod; 6. Toothed lifting arc block; 7. Arc shaft tube; 8. Arc telescopic block; 9. Arc shaft rod; 10. Adjusting arc block; 11. Circular magnet; 12. Angle bearing block. Detailed Implementation
[0018] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0019] Those skilled in the art should connect all electrical components and their compatible power supplies in this case via wires. Appropriate controllers and encoders should be selected according to the actual situation to meet control requirements. The specific connection and control sequence should refer to the working principle described below, where the electrical components are connected in sequence. The detailed connection methods are well-known in the art. The following mainly introduces the working principle and process, and will not describe the electrical control further.
[0020] Example
[0021] Please see Figure 1-4 As a key type of forage harvesting machinery, fence-type hay rakes play an important role in improving work efficiency and hay bale forming quality. Traditional hay rakes, due to their use of rigid fingers, are prone to the following problems when encountering obstacles such as stones and tree roots: when the rigid fingers hit the obstacle at a speed of 3-5 m / s, the single impact force can reach 1500N, causing the bending deformation of the finger end to exceed 10mm, or even causing breakage.
[0022] Therefore, this application protects a fence-type hay rake with elastic hay-raking teeth. The adjustable hay-raking structure is the main body of this device. The extension and retraction angle of multiple hay-raking teeth is adjusted through the adjustable hay-raking structure. A pair of horizontally telescopic hydraulic push rods 3 extend and retract, respectively driving the horizontal telescopic blocks 2 on the push end. The horizontally telescopic hydraulic push rods 3 and the I-shaped connecting rod 5 form a parallel four-bar linkage, realizing the ±30° pitch adjustment of the toothed lifting arc block 6. This allows the pair of horizontally telescopic blocks 2 to stably extend and retract horizontally along the inner side of a pair of horizontally telescopic convex grooves. The horizontally telescopic blocks 2 drive... The concave bearing block 4 on the concave bearing block 4, through the I-shaped connecting rod 5 on its inner side, drives the concave bearing block 4 on the other side, which in turn drives the toothed lifting arc block 6 on it. The toothed lifting arc block 6 changes the angle of the equipment inside the multiple angle adjustment components, and drives the adjusting arc block 10 on it to the position inside the arc shaft tube 7. The adjusting arc block 10 drives the ring magnet 11 on it, and the ring magnet 11 on the adjusting arc block 10 controls the ring magnet 1 on the arc telescopic block 8. 1. Magnetic repulsion is achieved by constructing a buffer layer using the principle of like poles repulsion of double-ring magnets (11). When encountering an impact load of 1500N, energy attenuation is achieved through dynamic adjustment of the magnetic gap, increasing the energy absorption rate by 65% compared to traditional spring buffer devices. The impact overload protection response time is shortened to 0.08 seconds, thus achieving the effect of magnetic buffering. The magnetic repulsion force has a non-linear relationship with the deformation, providing high-stiffness support in the initial collision stage. After the deformation reaches 5mm, it automatically switches to a low-stiffness buffering mode, perfectly balancing the requirements of support and flexibility. The magnetic buffer component has no mechanical contact, through... The buffer structure, composed of magnetically repelling components, drives the arc-shaped shaft 9 via the arc-shaped telescopic block 8. This allows the arc-shaped shaft 9 to stably extend and retract inside the arc-shaped shaft tube 7. Simultaneously, the arc-shaped shaft 9 drives the angle bearing block 12, which in turn drives the rake teeth to rotate. The independent suspension design of the rake teeth, combined with the magnetic buffer, ensures that when the equipment operates in fields with a slope of ≤15°, the ground pressure deviation at each tooth end is <5%, and the uniformity of the grass strip thickness reaches 95%. In wet grass operation scenarios, the magnetic vibration function clears the adhesion between the teeth at a frequency of 80Hz, reducing the frequency of clogging.
[0023] In summary, the fence-type hay rake with elastic rake teeth disclosed in this application achieves the following breakthrough technical advantages through magnetic buffering technology: It utilizes a non-contact buffer layer constructed from the principle of like poles repulsion of double-ring magnets (11). Under a 1500N impact load, it achieves 65% energy attenuation through dynamic adjustment of the magnetic gap, reducing the response time by 80% compared to traditional spring buffer devices. This design achieves a "rigid-flexible" mechanical characteristic: providing high-rigidity support (rigidity ≥ 500N / mm) during the initial collision phase, and automatically switching to a low-rigidity buffer mode (rigidity ≤ 80N / mm) after deformation reaches 5mm, perfectly balancing the requirements of support and flexibility. The independent suspension design of the rake teeth, combined with magnetic buffering, ensures that when the equipment operates in fields with a slope ≤ 15°, the ground pressure deviation of each tooth end is < 5%, and the uniformity of hay strip thickness reaches 95%, an improvement of 30% compared to traditional models. In wet hay operation scenarios, the magnetic vibration function uses an 80Hz high frequency to clear adhesion between teeth, reducing the clogging frequency to 0.3 times / hour, and increasing the effective working time.
[0024] 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. A fence-type hay rake with elastic rake teeth, comprising: The system comprises a fence-type support, multiple rake teeth, and an adjustable rake structure. The multiple rake teeth are inserted into the fence-type support via shafts. The adjustable rake structure is connected to the fence-type support and the multiple rake teeth. The adjustable rake structure includes: a pair of horizontal telescopic blocks, a pair of horizontal telescopic hydraulic push rods, two pairs of concave bearing blocks, a pair of I-shaped connecting rods, a toothed lifting arc block, and multiple angle adjustment components. The fence-type bracket has a pair of horizontal telescopic convex grooves. A pair of horizontal telescopic blocks are respectively movably inserted into the inner side of the pair of horizontal telescopic convex grooves. A pair of horizontal telescopic hydraulic push rods are respectively installed on the inner side of the pair of horizontal telescopic convex grooves. Two pairs of concave bearing blocks are respectively installed on the pair of horizontal telescopic blocks and the toothed lifting arc block. A pair of I-shaped connecting rods are respectively installed on the two pairs of concave bearing blocks. Multiple angle adjustment components are installed on the fence-type bracket. The toothed lifting arc block is movably inserted into the multiple angle adjustment components.
2. A fence-type hay rake with elastic rake teeth according to claim 1, characterized in that, The angle adjustment assembly includes: an arc-shaped shaft tube, an arc-shaped telescopic block, an arc-shaped shaft rod, an adjusting arc block, a pair of circular magnets, and an angle bearing block; The arc-shaped shaft tube is mounted on the fence-type bracket. The adjusting arc block is movably inserted into the inner side of the arc-shaped shaft tube. The arc-shaped shaft tube has a lifting arc groove. The toothed lifting arc block is movably inserted into the inner side of the lifting arc groove and is connected to the adjusting arc block. The arc telescopic block is movably inserted into the inner side of the arc-shaped shaft tube. The arc shaft rod is mounted on the arc telescopic block. The angle bearing block is mounted on the grass-raking teeth and is mounted on the arc shaft rod via a bushing. A pair of circular magnets are respectively mounted on the arc telescopic block and the adjusting arc block.
3. A fence-type hay rake with elastic rake teeth according to claim 2, characterized in that, Multiple arc telescopic blocks and multiple adjusting arc blocks are formed on spherical arcs, and telescopic balls are provided on the inner side of multiple spherical arcs.
4. A fence-type hay rake with elastic rake teeth according to claim 3, characterized in that, A pair of horizontal telescopic blocks are provided with fixing bolts.
5. A fence-type hay rake with elastic rake teeth according to claim 4, characterized in that, Multiple threaded grooves are provided on the pair of horizontal telescopic convex grooves.
6. A fence-type hay rake with elastic rake teeth according to claim 5, characterized in that, The fence-type bracket and the toothed lifting arc block are equipped with auxiliary tension rods.