Quick hitch structure for tractor drawbar

Abstract

The utility model discloses a tractor upper pull rod quick hook structure relates to tractor field, including the hook, the outer wall of hook is installed with first protective cover, the inner wall bonding of first protective cover has first magnetic ring, one side of first magnetic ring is pasted with second magnetic ring. The utility model discloses through setting first magnetic ring adopts high magnetism neodymium iron boron material, and the inner ring face is closely bonded with the outside wall of first protective cover through high strength epoxy glue, and first protective cover designs as half -wrap formula arc structure, avoids the friction interference of protective cover and pin shaft when operating, and can maximum degree cover protection area, and the magnetic polarity of second magnetic ring is contrary with first magnetic ring, and the outer ring face is bonded fixed with the inboard wall of second protective cover through high temperature resistant modified glue, when both butt joint, can form complete physical barrier in the key position, and the abrasion rate reduces, and the service life of part is prolonged significantly.

Description

Technical Field

[0001] This utility model relates to the field of tractors, specifically to a quick-hook structure for a tractor upper lever. Background Technology

[0002] Tractor hooks are typically a single pivot connection between the tractor drawbar and the implement, i.e., a simple fixed hook. In the traction devices of tractors of all horsepower ranges in China, a dedicated person operates the tractor to control the direction of travel of the traction device, which is cumbersome. Therefore, a quick-hook structure for the tractor drawbar is needed.

[0003] The existing quick-hook structure on tractors lacks automatic alignment guidance, which greatly increases the complexity of operation. It also lacks any dust and dirt prevention devices. In farming, sowing, and other operations, impurities such as soil, straw fragments, and sand can easily enter the gap between the hook and the pin, causing abrasive wear. Therefore, there is an urgent need for a quick-hook structure on tractors. Utility Model Content

[0004] Therefore, the purpose of this utility model is to provide a quick-hook structure for tractor upper levers to solve the problem that existing quick-hook structures for tractors lack automatic alignment guidance function, which leads to a sharp increase in operation complexity. In addition, without any dust and dirt prevention devices, impurities such as soil, straw fragments, and sand can easily enter the gap between the hook and the pin in farming, sowing and other operations, causing abrasive wear.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a quick hook structure for a tractor upper lever, including a hook, a first protective cover installed on the outer wall of the hook, a first magnetic ring adhered to the inner wall of the first protective cover, a second magnetic ring attached to one side of the first magnetic ring, and a second protective cover adhered to the outer wall of the second magnetic ring.

[0006] The inner wall of the second protective cover is equipped with a bracket, the inner wall of the bracket is equipped with a clip, the outer wall of the clip is welded with a spring, and guide blocks are welded to both sides of the hook.

[0007] Preferably, the hook is movably connected to the first protective cover, and the inner wall of the first protective cover has a slotted design.

[0008] Preferably, the inner wall of the first protective cover is in close contact with the outer wall of the first magnetic ring, and the diameter of the inner wall of the first protective cover is larger than the diameter of the outer wall of the first magnetic ring.

[0009] Preferably, the outer wall of the second magnetic ring is in close contact with the inner wall of the second protective cover, and the diameter of the outer wall of the second magnetic ring is smaller than the diameter of the inner wall of the second protective cover.

[0010] Preferably, the bracket is engaged with the card holder, and the inner wall of the bracket has an open design.

[0011] Preferably, the guide blocks are arranged symmetrically about the central axis of the hook, and the inner wall of the hook has an open design.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model uses a first magnetic ring made of high-magnetic neodymium iron boron material. Its inner ring surface is tightly bonded to the outer wall of the first protective cover with high-strength epoxy adhesive. The first protective cover is designed as a semi-enclosed arc structure, which avoids frictional interference between the protective cover and the pin during operation and can cover the protected area to the maximum extent. The magnetic polarity of the second magnetic ring is opposite to that of the first magnetic ring. Its outer ring surface is bonded to the inner wall of the second protective cover with high-temperature resistant modified adhesive. When the two are connected, a complete physical barrier can be formed in the key parts, reducing the wear rate and significantly extending the service life of the parts. 2. This utility model features hooks forged from high-strength alloy steel with pre-set welding planes on both sides. The guide blocks are made of the same material steel plate, cut and processed, and welded to the hooks using carbon dioxide gas shielded welding. A double-weld design is employed during welding to effectively avoid defects such as incomplete welds and missed welds. This design can withstand the impact force during hanger installation, providing a solid guarantee for the stable operation of the subsequent guiding function. The guide blocks are symmetrically welded on both sides of the hook, and their relative position to the hook's engagement slot is strictly controlled to ensure that the hanger contacts the guide blocks immediately upon entering the engagement area. The guide blocks form a guide entrance that is wider at the outside and narrower at the bottom, completely solving the problems of no guidance and hanger misalignment. This makes the hanger's docking path clearer and more controllable. When the hanger approaches the hook, even with a certain positional deviation, the end of the hanger will first contact the guide block at an angle. With surface contact, as the tractor continues to approach and advance, the beveled surface of the guide block generates a horizontal component force, gradually pushing the hanger towards the center of the hook's engagement slot, thus correcting deviations. This eliminates the need for repeated manual adjustments, significantly reducing operational difficulty. The clamp adopts a spring-return structure with a beveled angle design at one end, precisely matching the shape of the hanger's engagement end. When the hanger enters the hook's engagement slot under the action of the guide block, the hanger's engagement end first contacts the beveled surface of the clamp. As the hanger continues to advance, the pressure it exerts on the beveled surface is decomposed into a component force perpendicular to the bevel, pushing the clamp to compress the spring. When the hanger is fully inside the engagement slot, the clamp automatically rebounds under the action of the spring, and its non-beveled end precisely engages with the hanger's slot, locking the hanger. The entire process requires no manual operation of the clamp, achieving an automatic installation effect of locking upon advancement. Attached Figure Description

[0013] Figure 1 This is a perspective view of the present utility model; Figure 2 This is a schematic diagram of the structure of this utility model from a vertical sectional view; Figure 3 This is a structural schematic diagram of the present invention viewed from a height and disassembled. Figure 4 This utility model Figure 2 Enlarged structural diagram of section A in the middle.

[0014] In the diagram: 1. Hook; 2. First protective cover; 3. First magnetic ring; 4. Second magnetic ring; 5. Second protective cover; 6. Hanger; 7. Card holder; 8. Spring; 9. Guide block. Detailed Implementation

[0015] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0016] The embodiments of this utility model will be described below based on its overall structure.

[0017] Please see Figure 1-4 A quick-hook structure for a tractor pull rod includes a hook 1, a first protective cover 2 mounted on the outer wall of the hook 1, the hook 1 and the first protective cover 2 being movably connected, and the inner wall of the first protective cover 2 having a slotted design. A first magnetic ring 3 is adhered to the inner wall of the first protective cover 2, the inner wall of the first protective cover 2 and the outer wall of the first magnetic ring 3 being tightly fitted, and the diameter of the inner wall of the first protective cover 2 being larger than the diameter of the outer wall of the first magnetic ring 3. A second magnetic ring 4 is adhered to one side of the first magnetic ring 3, and a second protective cover 5 is adhered to the outer wall of the second magnetic ring 4, the outer wall of the second magnetic ring 4 and the inner wall of the second protective cover 5 being tightly fitted, and the outer wall of the second magnetic ring 4... The diameter is smaller than the inner wall diameter of the second protective cover 5. The first magnetic ring 3 is made of high magnetic neodymium iron boron material. Its inner ring surface is tightly bonded to the outer wall of the first protective cover 2 with high-strength epoxy adhesive. The first protective cover 2 is designed as a semi-enclosed arc structure, which avoids frictional interference between the protective cover and the pin during operation and can cover the protected area to the maximum extent. The magnetic polarity of the second magnetic ring 4 is opposite to that of the first magnetic ring 3. Its outer ring surface is bonded to the inner wall of the second protective cover 5 with high-temperature resistant modified adhesive. When the two are connected, a complete physical barrier can be formed in the critical parts, reducing the wear rate and significantly extending the service life of the parts.

[0018] Please see Figure 1-4A quick-hook structure for a tractor pull rod is disclosed. A bracket 6 is installed on the inner wall of a second protective cover 5, and a clamping bracket 7 is installed on the inner wall of the bracket 6. The bracket 6 and the clamping bracket 7 are engaged and connected. The inner wall of the bracket 6 has an open design. A spring 8 is welded to the outer wall of the clamping bracket 7. Guide blocks 9 are welded to both sides of the hook 1, and the guide blocks 9 are symmetrically arranged around the central axis of the hook 1. The inner wall of the hook 1 also has an open design. The hook 1 is forged from high-strength alloy steel, with pre-set welding planes on both sides. The guide blocks 9 are made of the same material steel plate and are cut and processed. Carbon dioxide gas shielded welding is used to weld and fix the hook 1. During the welding process, a double-seam design is adopted to effectively avoid defects such as incomplete welding and missed welding. It can withstand the impact force when the bracket 6 is installed, providing a solid guarantee for the stable operation of the subsequent guiding function. The guide blocks 9 are symmetrically welded on both sides of the hook 1, and the relative position with the hook 1's engagement slot is strictly controlled to ensure that the bracket 6 can contact the guide blocks 9 immediately when it enters the engagement area. The guide blocks 9 form a guide entrance that is wider at the outside and narrower at the bottom, completely solving the problem of bracket 6 being prone to tilting due to lack of guidance. The problem is that the docking path of the hanger 6 is clearer and more controllable. When the hanger 6 approaches the hook 1, even if there is a certain positional deviation, the end of the hanger 6 will first contact the beveled surface of the guide block 9. As the tractor continues to approach and advance, the beveled surface of the guide block 9 will generate a horizontal component force, gradually pushing the hanger 6 towards the center of the hook 1's engagement slot, thus correcting the deviation. This eliminates the need for repeated manual adjustments, significantly reducing the difficulty of operation. The clamp 7 adopts a spring 8 reset structure with a beveled angle design at one end, which is precisely aligned with the shape of the clamping end of the hanger 6. With proper adaptation, when the hanger 6 enters the hook 1's mounting slot under the action of the guide block 9, the snap-fit ​​end of the hanger 6 will first contact the inclined surface of the clip 7. As the hanger 6 continues to advance, the pressure it exerts on the inclined surface of the clip 7 will be decomposed into a component force perpendicular to the inclined surface, pushing the clip 7 to compress the spring 8. When the hanger 6 is fully inserted into the mounting slot, the clip 7 will automatically rebound under the action of the spring 8, and its non-inclined end will precisely engage with the slot of the hanger 6, completing the locking of the hanger 6. The entire process does not require manual operation of the clip 7, achieving an automatic installation effect of locking as soon as it is pushed in.

[0019] Working principle: When in use, take out the device and install it in the designated position. Attach and fix the first protective cover 2 to the first magnetic ring 3, then attach and fix the second magnetic ring 4 to the second protective cover 5. Next, push the hanger 6 into the hook 1, guide the hanger 6 with the guide block 9, and engage and fix the hanger 6 with the clip 7. Finally, magnetically attach the first protective cover 2 to the second protective cover 5 to protect the hook 1 and the hanger 6. This completes the use of the device. Content not described in detail in this manual is prior art known to those skilled in the art.

[0020] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A quick-hook structure for a tractor upper lever, comprising a hook (1), characterized in that: The hook (1) is equipped with a first protective cover (2) on its outer wall. A first magnetic ring (3) is bonded to the inner wall of the first protective cover (2). A second magnetic ring (4) is attached to one side of the first magnetic ring (3). A second protective cover (5) is bonded to the outer wall of the second magnetic ring (4). The inner wall of the second protective cover (5) is equipped with a bracket (6), the inner wall of the bracket (6) is equipped with a card holder (7), the outer wall of the card holder (7) is welded with a spring (8), and guide blocks (9) are welded on both sides of the hook (1).

2. The quick-hook structure for a tractor upper lever according to claim 1, characterized in that: The hook (1) is movably connected to the first protective cover (2), and the inner wall of the first protective cover (2) is a slotted design.

3. The quick-hook structure for a tractor upper lever according to claim 1, characterized in that: The inner wall of the first protective cover (2) is closely fitted with the outer wall of the first magnetic ring (3), and the inner wall diameter of the first protective cover (2) is larger than the outer wall diameter of the first magnetic ring (3).

4. The quick-hook structure for a tractor upper lever according to claim 1, characterized in that: The outer wall of the second magnetic ring (4) is in close contact with the inner wall of the second protective cover (5), and the outer wall diameter of the second magnetic ring (4) is smaller than the inner wall diameter of the second protective cover (5).

5. The quick-hook structure for a tractor upper lever according to claim 1, characterized in that: The bracket (6) is engaged with the card holder (7), and the inner wall of the bracket (6) is designed with openings.

6. The quick-hook structure for a tractor upper lever according to claim 1, characterized in that: The guide block (9) is symmetrically arranged around the central axis of the hook (1), and the inner wall of the hook (1) is designed with openings.

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