A pulling rod with a ball head convenient to replace

Abstract

The application discloses a drawbar with a ball head convenient to replace, and relates to the technical field of agricultural machinery. The drawbar comprises a drawbar and a ball pocket at the end of the drawbar, and the ball head is arranged in the ball pocket. The improvement lies in that the ball head is a split ball head composed of a left half ball and a right half ball, and a gap for conveniently mounting the split ball head is arranged on the outer side surface of the ball pocket. The application has the advantages that the split ball head is matched with the gap of the ball pocket, the ball head can be directly put into or taken out of the ball pocket from the side without press fitting, the worn ball head can be quickly and simply replaced on site, the whole drawbar assembly does not need to be scrapped, the maintenance cost and time are greatly reduced, and the attendance rate and resource utilization rate of the agricultural machinery are improved.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery, specifically to a traction device for agricultural machinery such as tractors and harvesters, and in particular a ball joint sleeve structure for connecting the traction rod and the trailer equipment. Background Technology

[0002] In existing technologies, the traction device of agricultural machinery is a key component for connecting tractors with implements such as plows, harrows, seeders, and trailers. Its reliability and ease of maintenance directly affect the operating efficiency and operating costs of agricultural machinery. Currently, the ball joints of widely used agricultural machinery drawbars are mostly connected to the drawbar body using an integrated press-fit structure. Specifically, the ball joint is usually forcibly pressed into the ball pocket at the end of the drawbar during the factory production stage using large pressure equipment, thus forming a non-removable whole.

[0003] During high-intensity agricultural machinery operations, the traction ball joint, as a core load-bearing component and oscillating friction part, endures enormous tensile, compressive, and impact loads, as well as wear, making it a vulnerable and easily damaged component. When the ball joint suffers severe wear, deformation, or breakage, due to its press-fitted structure, users or maintenance personnel cannot replace it individually on-site or at ordinary repair shops. The only solution is to scrap and replace the entire drawbar assembly. The cost of the drawbar assembly is far higher than that of a single ball joint, which significantly increases the later maintenance costs of the equipment and the operational burden on users.

[0004] Furthermore, discarding the entire intact drawbar due to the damage of just one component (the ball joint) results in a significant waste of resources such as steel, which contradicts the principles of green and sustainable modern manufacturing and maintenance. Therefore, the existing integrated press-fit drawbar structure can no longer meet the urgent needs of modern agricultural machinery for low-cost, high-efficiency maintenance. Utility Model Content

[0005] This application provides a tie rod that facilitates the replacement of ball heads, enabling quick and independent replacement of ball heads, thereby reducing maintenance costs, increasing equipment uptime, and effectively solving the problems in the prior art.

[0006] To achieve the above objectives, this application provides the following technical solution: a tie rod that facilitates ball head replacement, comprising a tie rod; a ball pocket is installed at the end of the tie rod, and a ball head is installed inside the ball pocket;

[0007] The ball head is a split ball head, which is composed of a left hemisphere and a right hemisphere joined together;

[0008] The upper part of the outer side of the ball pocket is provided with a notch to facilitate the installation of the split ball head.

[0009] Preferably, the left and right hemispheres are symmetrical.

[0010] Preferably, the notch is covered with a patch.

[0011] Preferably, the patch block is fixed to the ball pocket by bolts.

[0012] Preferably, the farthest distance from the edge of the ball pocket to the notch is D, where D is greater than the diameter of the ball head.

[0013] Preferably, the surface of the split ball head is provided with a wear-resistant layer.

[0014] Preferably, the shape of the filling block is the same as the shape of the gap, and the outer surface of the filling block is flush with the outer surface of the ball pocket.

[0015] Preferably, the contact points between the left and right hemispheres are provided with an arc-shaped chamfer.

[0016] Compared with the prior art, the beneficial effects of this application are:

[0017] 1. This application adopts a split ball head structure and a ball pocket notch design, which realizes quick and easy installation and disassembly of the ball head, greatly improving the convenience of replacement operation, and maintenance can be completed without special tools or complicated procedures;

[0018] 2. This structure allows only the ball joint component to be replaced when the ball joint is damaged, avoiding the problem of replacing the entire drawbar assembly due to ball joint failure. This significantly reduces equipment maintenance costs and the user's maintenance burden, and improves economic efficiency.

[0019] 3. This utility model improves the uptime and operating efficiency of agricultural machinery, while reducing resource waste caused by component damage. It conforms to the concept of green and sustainable manufacturing and maintenance, and extends the service life of the drawbar. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this application;

[0021] Figure 2 For the main view of this application Figure 1 ;

[0022] Figure 3 For the main view of this application Figure 2 ;

[0023] Figure 4 This is a schematic diagram of the split ball joint structure;

[0024] Figure 5 This is the front view of the split ball joint.

[0025] In the diagram: 1. Towing rod, 2. Notch, 3. Ball pocket, 4. Split ball head, 41. Left hemisphere, 42. Right hemisphere, 43. Curved chamfer, 5. Filler block. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0027] In the description of this application, if directional descriptions are involved, such as "up," "down," "front," "back," "left," "right," etc., indicating directional or positional relationships, they are based on the appendix. Figure 2 The orientations or positional relationships shown are for the convenience of describing this application and simplifying the description only, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. When a feature is referred to as "set", "fixed", or "connected" to another feature, it can be directly set, fixed, or connected to the other feature, or it can be indirectly set, fixed, or connected to the other feature.

[0028] Please see Figure 1-5 This application provides the following technical solution: a tie rod that facilitates the replacement of ball heads, including a tie rod 1; a ball pocket 3 is installed at the end of the tie rod 1, and a ball head is installed inside the ball pocket 3.

[0029] Specifically, the drawbar 1 is forged from high-strength alloy steel to ensure that it has sufficient tensile and torsional strength to meet the heavy-load traction requirements of agricultural machinery. The ball pocket 3 serves as a support and restraint mechanism, with a ball head installed inside. The ball pocket 3 is preferably fixedly connected to the drawbar 1 by welding to ensure the structural strength of the connection and prevent cracking under stress.

[0030] The ball head is a split ball head 4, which is composed of a left hemisphere 41 and a right hemisphere 42 joined together.

[0031] Specifically, when replacing the ball head, maintenance personnel do not need any large pressure equipment. They simply remove the worn or damaged old ball head from the ball pocket 3, then manually insert the new left hemisphere 41 and right hemisphere 42 into the ball pocket 3 through the notch 2 on the side. Finally, they align and join the two hemispheres to form a complete ball head. This greatly simplifies the maintenance process, lowers the maintenance threshold, and reduces time costs. In terms of manufacturing, the left hemisphere 41 and right hemisphere 42 can be cast from alloy steel and then precision ground to ensure the accuracy and smoothness of their spherical surfaces.

[0032] More specifically, the left hemisphere 41 and the right hemisphere 42 are carburized during the processing to increase their wear resistance.

[0033] The upper outer surface of the ball pocket 3 is provided with a notch 2 to facilitate the installation of the split ball head 4.

[0034] Specifically, the notch 2 is a key structural feature that enables convenient replacement. Its advantage is that it provides a direct assembly channel, allowing the split ball head 4 to be radially inserted into the ball pocket, rather than being pressed in axially as in traditional methods. During machining, the notch 2 is created by milling.

[0035] More specifically, notch 2 is a rectangular cut.

[0036] Furthermore, the left hemisphere 41 and the right hemisphere 42 are symmetrical.

[0037] Specifically, this design greatly improves the versatility and interchangeability of parts, and reduces the complexity of production and inventory management. Both the left and right hemispheres can be produced using the same set of molds, and there is no need to distinguish directions during assembly, effectively preventing incorrect assembly and improving assembly efficiency.

[0038] Furthermore, the gap 2 is covered with a filler block 5.

[0039] Specifically, once the ball head is installed, it can seal the notch 2, restoring the complete annular structure of the ball pocket 3. This prevents external dirt from entering the ball pocket 3 through the sealed notch 2 during traction operations.

[0040] Furthermore, the missing piece 5 is fixed to the ball pocket 3 by bolts.

[0041] Specifically, the advantages of this connection method are that the connection is firm and reliable, and disassembly is convenient. Maintenance personnel only need to use ordinary wrenches or socket tools to tighten or loosen the bolts, so as to install and remove the patch, making the operation very simple.

[0042] Furthermore, the farthest distance from the edge of the ball pocket 3 to the notch 2 is D, where D is greater than the diameter of the ball head.

[0043] Specifically, the advantage of this dimensional relationship is that it ensures that the split ball head 4 can be inserted into or removed from the ball pocket 3 without any obstruction through the notch 2. This is a fundamental structural guarantee for convenient replacement, eliminating the problem of being unable to replace due to dimensional interference from the design.

[0044] Furthermore, the surface of the split ball head 4 is provided with a wear-resistant layer.

[0045] Specifically, the wear-resistant layer is formed on the surface of the ball head through heat treatment processes such as high-frequency quenching and carburizing, thereby effectively resisting friction and wear between the ball head and the towing equipment ball cup during use.

[0046] Furthermore, the shape of the filling block 5 is the same as the shape of the gap 2, and the outer surface of the filling block 5 is flush with the outer surface of the ball pocket 3.

[0047] Specifically, the advantages of this design are that, on the one hand, it ensures that the filling block 5 can perfectly fill the gap without leaving any gaps; on the other hand, the flat outer surface can avoid uneven bumps or depressions, making the overall structure smooth and reducing the possibility of snagging on weeds or soil when working in complex farmland environments.

[0048] Furthermore, the contact position between the left hemisphere 41 and the right hemisphere 42 is provided with an arc-shaped chamfer 43.

[0049] Specifically, the advantages of the arc-shaped chamfer 43 are mainly reflected in two aspects: First, it plays a guiding role during assembly, making it easy for the two hemispheres to be accurately and smoothly aligned and joined; second, after joining, the chamfers of the two hemispheres together form an annular stress relief groove, which helps to disperse and reduce stress concentration at the edge of the contact surface, thereby improving the fatigue strength and service life of the ball head.

[0050] When in use: When the ball head of the drawbar wears down due to long-term use and needs to be replaced, maintenance personnel do not need to disassemble the entire drawbar or use large pressure equipment. They can quickly complete the replacement on site by following these steps.

[0051] First, use a wrench or other common tools to loosen and remove the bolts that secure the patch block 5 to the ball pocket 3, then remove the patch block 5 to fully expose the notch 2 on the side of the ball pocket 3. Then, remove the worn or damaged split ball head 4 from inside the ball pocket 3 through this notch 2.

[0052] Take a new set of split-type ball heads 4, which consists of a left hemisphere 41 and a right hemisphere 42. Since the left hemisphere 41 and the right hemisphere 42 are symmetrical, there is no need to distinguish the left and right order during assembly, which greatly simplifies the operation. The maintenance personnel can insert the left hemisphere 41 and the right hemisphere 42 radially into the internal cavity of the ball pocket 3 through the notch 2 on the ball pocket 3, either sequentially or simultaneously. When inserting, the arc-shaped chamfer 43 on the contact surface of the two hemispheres can be used as a guide to easily and accurately align and assemble the two hemispheres, forming a complete, freely rotating sphere inside the ball pocket.

[0053] After the split ball head 4 is assembled inside the ball pocket 3, the patch block 5 is placed over the gap 2. Since the shape of the patch block 5 is exactly the same as the gap 2, and its outer surface is flush with the outer surface of the ball pocket 3, the complete annular structure of the ball pocket 3 can be perfectly restored. Finally, bolts are used to firmly fasten the patch block 5 to the ball pocket 3.

[0054] The ball joint replacement is now complete. The filler block 5 acts as a seal and lock, preventing the ball joint from coming out of the notch during operation and ensuring the reliability and safety of traction transmission. The entire replacement process is simple and quick, significantly reducing equipment downtime and effectively improving the uptime and operational efficiency of agricultural machinery.

[0055] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tie rod for easy replacement of ball head, comprising a tie rod (1); a ball pocket (3) is installed at the end of the tie rod (1), and a ball head is installed inside the ball pocket (3); characterized in that The ball head is a split ball head (4), which is composed of a left hemisphere (41) and a right hemisphere (42) joined together; The upper part of the outer side of the ball pocket (3) is provided with a notch (2) to facilitate the installation of the split ball head (4).

2. A drag link with a ball stud that is easy to replace, according to claim 1, characterized in that: The left hemisphere (41) and right hemisphere (42) are symmetrical structures.

3. A drawbar with a ball head for easy replacement according to claim 1, characterized in that: The gap (2) is covered with a filler block (5).

4. A drawbar according to claim 3 wherein: The missing block (5) is fixed to the ball pocket (3) by bolts.

5. A drag link with a ball stud that is easy to replace, according to claim 1, characterized in that: The furthest distance from the edge of the ball pocket (3) to the notch (2) is D, where D is greater than the diameter of the ball head.

6. A drag link with a ball stud that is easy to replace, according to claim 1, characterized in that: The surface of the split ball head (4) is provided with a wear-resistant layer.

7. A drawbar according to claim 3 wherein: The shape of the filling block (5) is the same as that of the notch (2), and the outer surface of the filling block (5) is flush with the outer surface of the ball pocket (3).

8. A drag link with a ball stud that is easy to replace, according to claim 1, characterized in that: The contact points of the left hemisphere (41) and the right hemisphere (42) are provided with arc-shaped chamfers (43).

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