An adjustable drawbar

Abstract

The application discloses a kind of adjustable tow bar, belong to the technical field of agricultural equipment.The tow bar includes internally threaded sleeve, and the both ends are respectively threadedly connected with the extension rod with ball pocket and insert arm.Internal threaded sleeve outside is fixed with adjusting petal, and is slidably sleeved with adjusting sleeve tube.Adjusting sleeve tube is slidably connected with the petal structure of adjusting petal through the bar slot of its inside, realizes stable guiding.Sleeve tube end and insert arm form bottom dustproof seal through magnetic positioning block and clamping groove structure, while adjusting petal and sleeve inner wall form top dustproof structure, effectively prevent silt from invading.Symmetrically arranged handle outside sleeve facilitates rotation operation.The utility model realizes the stepless, convenient adjustment of tow bar length, significantly improves dustproof effect and structural reliability, and is suitable for dusty and humid farmland working environment.

Description

Technical Field

[0001] This application relates to the field of agricultural machinery and equipment technology, specifically to an adjustable drawbar. Background Technology

[0002] Agricultural mechanization is a crucial support for the development of modern agriculture. As a key component connecting agricultural machinery and implements, the performance of the traction device directly affects the overall working efficiency and ease of operation. In farmland operations, the drawbar is commonly used to connect tractors to equipment such as plows, harrows, and seeders; the rationality and adaptability of its structural design have a significant impact on the quality of operation.

[0003] Currently, most common drawbars employ fixed-length or simple pin-type adjustment structures, such as using multiple holes with a pin to achieve limited length adjustment. While these structures are simple and reliable, they still have certain limitations in practical use: firstly, the adjustment range is limited, making it difficult to meet the precise requirements of different agricultural implements or terrain for the drawbar position; secondly, the adjustment process usually requires manual disassembly, alignment, and reinstallation, which is inconvenient and can easily cause wear or loosening of the connecting parts during frequent adjustments, affecting service life.

[0004] Another common type of adjustable pull rod uses a connection between a screw and a threaded sleeve. When adjusting the extension or retraction, it is only necessary to rotate the screw or the threaded sleeve. This type of pull rod often does not adequately consider dust prevention and sealing, especially in dusty and humid farmland environments, where mud and sand can easily enter the threaded parts, leading to difficulty in adjustment or jamming, further affecting its reliability and service life. Utility Model Content

[0005] This application provides an adjustable towing rod that is easy to adjust, has good dustproof effect, and has a stable structure, which significantly improves the adaptability and reliability of agricultural towing operations and can effectively solve the problems in the background art.

[0006] To achieve the above objectives, this application provides the following technical solution: an adjustable traction rod, including an internally threaded sleeve; the two ends of the internally threaded sleeve are respectively threadedly connected to an extension rod one and an extension rod two, the two ends of the extension rod one and the extension rod two are respectively connected to a ball pocket and an insert arm, the outer side of the internally threaded sleeve is fixedly connected to an adjusting petal near the extension rod two, and the outer side of the adjusting petal is slidably connected to an adjusting sleeve.

[0007] The adjusting sleeve includes a cylindrical sleeve, the end of which is magnetically connected to the end of the insert arm to form a lower dustproof structure.

[0008] Preferably, the outer side of the cylindrical sleeve is symmetrically provided with two handles.

[0009] Preferably, a ball head is installed inside the ball pocket.

[0010] Preferably, the inner side of the cylindrical sleeve is provided with multiple strip grooves, and the multiple strip grooves are evenly distributed in a ring array on the inner side of the cylindrical sleeve. The outer side of the adjusting petal is provided with multiple protruding petal structures, the number of petal structures is the same as the number of strip grooves, and the petal structures are slidably connected to the strip grooves.

[0011] Preferably, the adjusting petals and the inner side of the cylindrical sleeve form an upper dustproof structure.

[0012] Preferably, the end of the cylindrical sleeve is provided with a slot, which is correspondingly engaged with a magnetic positioning block provided on the outer side end of the insert arm.

[0013] Compared with the prior art, the beneficial effects of this application are:

[0014] 1. This application achieves convenient adjustment of the traction rod length by using the threaded connection between the internal threaded sleeve and the extension rod, combined with the sliding fit between the adjusting sleeve and the adjusting petals. The adjustment can be completed without disassembly, which improves the operating efficiency and adaptability.

[0015] 2. By adjusting the top dustproof structure formed by the petals and the inner side of the cylindrical sleeve, and the bottom dustproof structure formed by the magnetic connection between the end of the cylindrical sleeve and the end of the insert arm, mud and dust are effectively prevented from entering the threaded parts, reducing wear and jamming, and enhancing reliability and service life in harsh environments.

[0016] 3. The strip groove on the inner side of the cylindrical sleeve slides and connects with the petal structure of the adjusting petals, ensuring stability and guidance during the adjustment process. At the same time, the magnetic positioning block and the corresponding slot are set to provide additional fixing, ensuring the connection is firm and safe. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this application;

[0018] Figure 2 This is a schematic diagram of the structure after the adjustment sleeve has been removed in this application;

[0019] Figure 3 This is a schematic diagram of the adjusting sleeve.

[0020] Figure 4 A schematic diagram illustrating the structure of the petals;

[0021] Figure 5 This is a schematic diagram of the structure in use according to this application.

[0022] In the diagram: 1 Insert arm, 2 Magnetic positioning block, 3 Extension rod one, 4 Ball pocket, 5 Ball head, 6 Internal threaded sleeve, 7 Adjusting sleeve, 71 Strip groove, 72 Handle, 73 Cylindrical sleeve, 74 Slot, 8 Adjusting petals, 9 Extension rod two, 10 Dust cover. Detailed Implementation

[0023] 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.

[0024] 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 5 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.

[0025] Please see Figure 1-5 This application provides the following technical solution: an adjustable traction rod, including an internally threaded sleeve 6; the two ends of the internally threaded sleeve 6 are respectively threadedly connected to an extension rod 3 and an extension rod 9, the two ends of the extension rod 3 and the extension rod 9 are respectively connected to a ball pocket 4 and an insert arm 1, the outer side of the internally threaded sleeve 6 is fixedly connected to an adjusting petal 8 near the extension rod 9, and the outer side of the adjusting petal 8 is slidably connected to an adjusting sleeve 7.

[0026] Specifically, this structure achieves stepless adjustment of the traction rod length through the threaded connection between the internal threaded sleeve and the extension rod. Precise adjustment can be made without disassembling parts, which greatly improves operating efficiency and adaptability. The internal threaded sleeve 6 has left-hand threads at both ends. When the internal threaded sleeve 6 is rotated, the extension rod 1 3 and the extension rod 2 9 can extend or retract simultaneously. The sliding fit between the adjusting petal 8 and the adjusting sleeve 7 provides a stable guiding effect, preventing deviation or jamming during the adjustment process, and ensuring the reliability and durability of the traction rod in farmland operations.

[0027] More specifically, when adjusting the length, the operator only needs to rotate the adjusting sleeve 7 to cause the extension rod 3 and extension rod 9 to extend and retract within the internal threaded sleeve 6, thereby changing the total length of the traction rod. The sliding connection between the adjusting petal 8 and the adjusting sleeve 7 ensures the smoothness of the adjustment process.

[0028] A dust cover 10 is fitted onto the outer side of the extension rod 3, and the dust cover 10 covers the end of the internal threaded sleeve 6.

[0029] The adjusting sleeve 7 includes a cylindrical sleeve 73, the end of which is magnetically connected to the end of the insert arm 1 to form a lower dustproof structure.

[0030] Specifically, the magnetic connection design effectively prevents mud, dust, and moisture from entering the internal threaded sleeve 6 and extension rod from the bottom, reducing wear and corrosion of threaded components and significantly improving service life and reliability in harsh agricultural environments. The magnetic force provides sufficient connection strength to ensure that the dustproof structure does not easily loosen under vibration.

[0031] When the length of the traction rod needs to be adjusted, the operator can easily detach the magnetic connection between the cylindrical sleeve 73 and the insert arm 1, adjust the length, and then reattach them. This design requires no tools, simplifies the operation, and is particularly suitable for work scenarios requiring frequent adjustments.

[0032] Furthermore, a ball head 5 is installed inside the ball pocket 4.

[0033] Specifically, the combination of ball head 5 and ball sleeve 4 enables omnidirectional rotation, allowing the drawbar to swing flexibly in multiple directions to adapt to uneven terrain or the tilt angle of agricultural implements, reducing stress concentration at the connection points and lowering the risk of wear. This design improves the compatibility and stability of traction operations, and is especially suitable for implements such as plows and harrows that require angle adjustment.

[0034] More specifically, by connecting the ball head 5 to the ball seat of the tractor or implement, a quick articulation can be achieved. During operation, the ball head 5 can rotate freely within the ball pocket 4, automatically compensating for changes in the traction direction and ensuring smooth power transmission.

[0035] Furthermore, the inner side of the cylindrical sleeve 73 is provided with a plurality of strip grooves 71, and the plurality of strip grooves 71 are evenly distributed in a ring array on the inner side of the cylindrical sleeve 73. The outer side of the adjusting petal 8 is provided with a plurality of raised petal structures, the number of petal structures being the same as the number of strip grooves 71, and the petal structures being slidably connected to the strip grooves 71.

[0036] Specifically, the length of the strip groove 71 is the maximum extension length of extension rod 3 and extension rod 9. The sliding connection between the strip groove 71 and the segmented structure provides precise guidance and anti-rotation function, ensuring that the adjusting sleeve 7 will not slip or deviate when rotating, thus enhancing the stability and controllability of the adjustment.

[0037] More specifically, when the operator rotates the adjusting sleeve 7, the segmented structure slides along the strip groove 71, causing the internal threaded sleeve 6 to rotate synchronously, thereby driving the extension rod to extend and retract. The annular array layout of the strip grooves ensures uniform force distribution and a smooth and effortless adjustment process.

[0038] Furthermore, the adjusting petal 8 and the inner side of the cylindrical sleeve 73 form an upper dustproof structure.

[0039] Specifically, the top dustproof structure effectively blocks mud, dust, and debris from entering the contact area of ​​the internal threaded sleeve 6 and the adjusting petals 8 from the top, preventing thread jamming or wear and improving protection performance in dusty environments; the structure is simple and reliable, requires no additional seals, and reduces maintenance costs.

[0040] More specifically, during adjustment, the inner surface of the adjusting petal 8 and the cylindrical sleeve 73 maintains close sliding contact, forming a natural barrier. No special maintenance is required in daily use; the dustproof structure automatically cleans the contact surface as it slides.

[0041] Furthermore, the end of the cylindrical sleeve 73 is provided with a slot 74, which is correspondingly engaged with the magnetic positioning block 2 provided on the outer side end of the insert arm 1.

[0042] Specifically, the cooperation between the slot 74 and the magnetic positioning block 2 provides both mechanical locking and magnetic fixation, enhancing the robustness and safety of the connection and preventing the adjusting sleeve 7 from accidentally coming loose during vibration. The magnetic design facilitates quick alignment and connection, improving operational convenience.

[0043] Furthermore, two handles 72 are symmetrically arranged on the outer side of the cylindrical sleeve 73.

[0044] Specifically, the handle 72 facilitates the rotational adjustment of the cylindrical sleeve 73.

[0045] When in use: its usage status is as shown in the instruction manual. Figure 5 As shown, firstly, the ball joint 5 at one end of the drawbar is connected to the drawbar seat of the tractor or other power machinery, achieving universal jointing through the ball-and-socket structure. Then, the insert arm 1 at the other end is connected to the agricultural implement that needs to be towed.

[0046] When the length of the drawbar needs to be adjusted to adapt to different agricultural implements or working terrain, the operator can hold the handles 72 symmetrically set on the outer wall of the adjusting sleeve 7 with both hands. First, pull the adjusting sleeve 7 upward along the extension rod 9. After the adjusting sleeve 7 separates from the insert arm 1, rotate the adjusting sleeve 7 clockwise or counterclockwise. Since the adjusting sleeve 7 slides in conjunction with the split structure of the adjusting petals 8 fixed on the internal threaded sleeve 6 through the inner groove 71, this operation will drive the internal threaded sleeve 6 to rotate synchronously. The rotation of the internal threaded sleeve 6 causes the extension rod 3 and extension rod 9, which are threaded to its two ends, to retract inward or extend outward simultaneously, thereby realizing stepless and continuous adjustment of the total length of the drawbar. This process does not require disassembly of any parts, making it convenient and quick.

[0047] The outer surface of the adjusting petal 8 slides tightly against the inner surface of the cylindrical sleeve 73, forming an effective sealing barrier to prevent dust and sand from entering the threaded pair between the internal threaded sleeve 6 and the extension rod. After adjustment, the end of the cylindrical sleeve 73 engages with the magnetic positioning block 2 on the insert arm 1 via its groove 74 and is magnetically attracted. This forms a bottom sealing structure, effectively blocking dust and moisture from entering from below.

[0048] After being adjusted to the required length, the magnetic connection provides additional positioning protection, ensuring that the adjusting sleeve 7 will not rotate unexpectedly in a vibration environment.

[0049] 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. An adjustable draw bar, characterized by: Includes an internal threaded sleeve (6); the two ends of the internal threaded sleeve (6) are respectively threaded with an extension rod one (3) and an extension rod two (9), the two ends of the extension rod one (3) and the extension rod two (9) are respectively connected with a ball pocket (4) and an insert arm (1), the outer side of the internal threaded sleeve (6) is fixedly connected with an adjusting petal (8) near the extension rod two (9), and the outer side of the adjusting petal (8) is slidably connected with an adjusting sleeve (7); The adjusting sleeve (7) includes a cylindrical sleeve (73), the end of which is magnetically connected to the end of the insert arm (1) to form an upper dustproof structure.

2. An adjustable draw bar according to claim 1 wherein: The ball head (5) is installed inside the ball pocket (4).

3. An adjustable draw bar according to claim 1 wherein: The inner side of the cylindrical sleeve (73) is provided with multiple strip grooves (71), and the multiple strip grooves (71) are evenly distributed in a ring array on the inner side of the cylindrical sleeve (73). The outer side of the adjusting petal (8) is provided with multiple protruding petal structures, the number of petal structures is the same as the number of strip grooves (71), and the petal structures are slidably connected to the strip grooves (71).

4. An adjustable draw bar according to claim 3 wherein: The adjusting petals (8) and the inner side of the cylindrical sleeve (73) form a dustproof structure at the lower end.

5. An adjustable draw bar according to claim 3 wherein: The end of the cylindrical sleeve (73) is provided with a slot (74), which is engaged with the magnetic positioning block (2) provided on the outer side end of the insert arm (1).

6. An adjustable draw bar according to claim 3 wherein: The outer side of the cylindrical sleeve (73) is symmetrically provided with two handles (72).

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