Tractor hydraulic lift drawbar and control method thereof

Abstract

The present application relates to the technical field of agricultural machinery, and provides a tractor hydraulic lifting towing hook and a control method thereof, which comprises a base, a distributor is arranged above the base, and an adjusting structure is fixed to one side of the base.The adjusting structure is arranged, the distributor is used to control the inflow or outflow of hydraulic oil into or out of the hydraulic oil cylinder, when the hydraulic oil cylinder piston rod is extended, the hydraulic oil cylinder drives the swing arm to move upward, the swing arm drives the rotating shaft to rotate in the support plate, meanwhile, the towing hook body is lifted upward through the connecting rod, one end of the towing hook body swings on one side of the fixed seat, thereby changing the height of the towing hook body, the extension and retraction amount of the oil cylinder hydraulic oil cylinder is controlled through the distributor, the labor intensity is reduced, the hitching time is shortened, the stable power provided by the hydraulic system and the stepless adjustment capability make the towing hook body accurately align with the hitching point, and the repeated attempts, hitching failure and mechanical wear caused by height deviation are effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery technology, and in particular to a hydraulic lifting traction hook for a tractor and its control method. Background Technology

[0002] In traditional agricultural operations, the process of attaching tractors to trailers, seeders, harvesters and other agricultural implements usually relies on manually adjusting the height of the tow hook. This not only requires the driver to get on and off the vehicle frequently, but may also lead to attachment difficulties due to limited visibility or poor positioning. Especially in muddy or uneven fields, it is time-consuming and laborious to operate. Therefore, a hydraulic lifting tow hook for tractors is used. To address this, patent CN116061619A discloses a tractor traction device, including a fixed frame. A traction mechanism is housed inside the fixed frame, and a right-side connecting mechanism is located on the right side of the traction mechanism. The traction mechanism includes a traction component and a connecting component, with the connecting component positioned on the right side of the traction component. This tractor traction device uses a pull shaft to pull a sliding body within the connecting frame, causing the sliding body to pull a second spring on the left and compress a second spring on the right. Simultaneously, the connecting frame causes a sliding plate to slide to the right within the fixed frame. The sliding plate then pulls a connecting rod via a first hinge seat, which in turn pulls a sliding block outside the fixed rod via a second hinge seat. This causes the sliding block to compress a first spring, thus using the first and second springs for buffering and preventing breakage due to excessive traction force. Although the tractor towing device described above uses the first and second springs for cushioning to prevent breakage due to excessive traction force, its height is inconvenient to adjust. Traditional towing hooks lack flexible, stepless adjustment capabilities for trailers or implements of different heights, making it difficult to meet diverse operational needs. Drivers need to frequently get on and off the vehicle, manually move heavy objects, or operate mechanical mechanisms to adjust the towing hook height, which is time-consuming and labor-intensive, resulting in low coupling efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide a tractor hydraulic lifting tow hook and its control method, so as to solve the defect of existing tractor hydraulic lifting tow hooks that are inconvenient to adjust in height.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a hydraulic lifting towing hook for a tractor, including a base; A distributor is provided above the base, and an adjustment structure is fixed on one side of the base. The adjustment structure includes fixed seats fixed to both sides of the bottom end of the base. A hydraulic cylinder is hinged to one end of each fixed seat. A rotating shaft is provided on one side of the top of the base. Support plates are sleeved on the outer sides of both ends of the rotating shaft. A swing arm is fixed to both ends of the rotating shaft. A connecting rod is hinged to one end of each swing arm. Both sides of the bottom end of the base are provided with traction hook bodies; A connecting structure is provided on one side of the inside of the traction hook body, and a fixing structure is fixed on the side of the base away from the adjustment structure.

[0005] Preferably, the hydraulic cylinder is a double-acting cylinder, with its top end hinged to the bottom end of the swing arm and the bottom end of the connecting rod hinged to the top end of the traction hook body. Hydraulic oil flows into and out of the hydraulic cylinder via a distributor. When the piston rod of the hydraulic cylinder extends, the cylinder drives the swing arm upward, which in turn drives the rotating shaft to rotate inside the support plate. Simultaneously, the connecting rod lifts the traction hook body upward.

[0006] Preferably, one side of the support plate is fixedly connected to one side of the base, and one side of the fixed seat is hinged to one side of the towing hook body. One end of the towing hook body swings on one side of the fixed seat, thereby changing the height of the towing hook body. The extension and retraction of the hydraulic cylinder is controlled by the distributor, reducing labor intensity and shortening the preparation time for hooking. The smooth power and stepless adjustment capability provided by the hydraulic system enable the towing hook body to be accurately aligned with the hooking point, effectively reducing repeated attempts, hooking failures, and mechanical wear caused by height deviation.

[0007] Preferably, the connecting structure includes a through hole, a threaded sleeve, a first chain, a threaded post, and a second chain. The through hole extends through one side of the traction hook body. A second chain is fixed to one side of the traction hook body, and a first chain is fixed to the other side. A threaded sleeve is fixed to the bottom end of each of the first chains, and a threaded post is fixed to the bottom end of each of the second chains. The first and second chains prevent the threaded sleeve and threaded post from being lost. When the traction hook body is aligned with the engagement point, the threaded post is moved so that it passes through the through hole and the engagement point.

[0008] Preferably, the threaded post and the traction hook body form a sliding structure through a through hole, and the threaded post and the threaded sleeve are engaged. Moving the threaded sleeve causes one end of the threaded sleeve to abut against one end of the threaded post. Rotating the threaded sleeve clockwise mechanically locks the threaded sleeve and the threaded post together, thus completing the engagement.

[0009] Preferably, the oil inlet of the distributor is connected to the hydraulic pump of the tractor, and the oil outlet of the distributor is connected to the oil port of the hydraulic cylinder through a connecting pipe.

[0010] Preferably, the distributor is electromagnetically controlled.

[0011] Preferably, the fixing structure includes a fixing plate, a mounting base, a mounting groove, and reinforcing ribs. The fixing plate is fixed to one side of the base, and the mounting base is fixed to one side of the fixing plate. Mounting grooves extend through both sides of the mounting base, and reinforcing ribs are evenly fixed to the bottom end of the mounting base. By directly connecting and fixing the mounting base to the tractor's rear axle, the base and rear axle are rigidly integrated. The mounting grooves facilitate adaptation to the mounting hole positions of different tractor rear axle models.

[0012] Preferably, one side of the reinforcing rib is fixedly connected to one side of the fixing plate. The reinforcing rib enhances structural strength and rigidity, preventing the fixing plate and mounting base from bending, deforming, or breaking under high traction forces and frequent lifting impacts, thereby improving the service life and safety of the device.

[0013] A control method for a tractor hydraulic lifting tow hook includes the following steps: S1. Under the action of the mounting groove, the mounting seat is connected and fixed to the rear axle of the tractor. At the same time, it is easy to adapt to the mounting hole positions of different models of tractor rear axles. Under the action of the reinforcing rib, it is used to improve the structural strength and rigidity, and prevent the fixing plate and mounting seat from bending, deforming or breaking under large traction force and frequent lifting impact. S2. The driver operates the distributor in the cab, so that the distributor controls the flow of hydraulic oil into or out of the hydraulic cylinder; S3. When the piston rod of the hydraulic cylinder extends or retracts, the hydraulic cylinder will drive the swing arm to move up and down. The swing arm will drive the rotating shaft to rotate inside the support plate. At the same time, it will drive the traction hook body to rise and fall through the connecting rod. One end of the traction hook body will swing up and down on one side of the fixed seat, thereby changing the height of the traction hook body. The extension and retraction of the hydraulic cylinder is controlled by the distributor, which reduces labor intensity and shortens the preparation time for hooking. The smooth power and stepless adjustment capability provided by the hydraulic system enable the traction hook body to be accurately aligned with the hooking point, effectively reducing repeated attempts, hooking failures and mechanical wear caused by height deviation. S4. When the towing hook body is aligned with the engagement point, stop operating the distributor, complete the height adjustment, move the threaded column so that the threaded column passes through the through hole and the engagement point, then move the threaded sleeve so that one end of the threaded sleeve abuts against one end of the threaded column, rotate the threaded sleeve clockwise to achieve mechanical locking between the threaded sleeve and the threaded column, and thus complete the engagement under the action of the threaded sleeve and the threaded column.

[0014] The present invention provides a hydraulic lifting tow hook for a tractor and its control method, the advantages of which are: By incorporating an adjustable structure and controlling the flow of hydraulic oil into or out of the hydraulic cylinder via a distributor, when the hydraulic cylinder piston rod extends, the hydraulic cylinder drives the swing arm to move upward. The swing arm then drives the rotating shaft to rotate inside the support plate, simultaneously lifting the traction hook body upward via a connecting rod. One end of the traction hook body swings to one side of the fixed seat, thereby changing the height of the traction hook body. The distributor controls the extension and retraction of the hydraulic cylinder, reducing labor intensity and shortening the preparation time for hooking. The smooth power and stepless adjustment capability provided by the hydraulic system allow the traction hook body to be accurately aligned with the hooking point, effectively reducing repeated attempts, hooking failures, and mechanical wear caused by height deviations. By setting up a connecting structure, the threaded sleeve and threaded post are prevented from being lost under the action of the first chain and the second chain. When the traction hook body is aligned with the hook point, the threaded post is moved so that it passes through the through hole and the hook point. At this time, the threaded sleeve is moved so that one end of the threaded sleeve abuts against one end of the threaded post. The threaded sleeve is rotated clockwise so that the threaded sleeve and the threaded post are mechanically locked. Under the action of the threaded sleeve and the post, the hooking is completed. By setting up a fixed structure and directly connecting and fixing it to the tractor's rear axle through the mounting base, the base and the rear axle are rigidly integrated. With the help of the mounting groove, it is easy to adapt to the mounting hole positions of different models of tractor rear axles. With the help of the reinforcing ribs, it is used to improve the structural strength and rigidity, and prevent the fixing plate and mounting base from bending, deforming or breaking under high traction force and frequent lifting impact, thereby improving the service life and safety of the device. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the three-dimensional first-view structure of the main cross-section of the present invention; Figure 3 This is a side-view cross-sectional three-dimensional first-perspective structural schematic diagram of the present invention; Figure 4 This is a side view cross-sectional exploded three-dimensional structural schematic diagram of the present invention; Figure 5 This is a three-dimensional structural diagram of the connection structure and the traction hook body of the present invention; Figure 6 This is a three-dimensional structural diagram of the connection structure of the present invention; Figure 7 This is a three-dimensional structural schematic diagram of the fixed structure of the present invention, viewed from the side. Figure 8 This is a rear-view three-dimensional structural diagram of the fixed structure of the present invention; Figure 9This is a schematic diagram of the three-dimensional second-view structure of the main cross-section of the present invention; Figure 10 This is a side-view cross-sectional three-dimensional second-perspective structural schematic diagram of the present invention.

[0016] The reference numerals in the figure are as follows: 1. Base; 2. Adjustment structure; 21. Hydraulic cylinder; 22. Connecting rod; 23. Swing arm; 24. Rotating shaft; 25. Support plate; 26. Fixed seat; 3. Traction hook body; 4. Connecting structure; 41. Through hole; 42. Threaded sleeve; 43. First chain; 44. Threaded post; 45. Second chain; 5. Distributor; 6. Fixing structure; 61. Fixed plate; 62. Mounting seat; 63. Mounting groove; 64. Reinforcing rib. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figures 1-10 The present invention provides a hydraulic lifting tow hook for a tractor, comprising a base 1, a distributor 5 disposed above the base 1, an adjusting structure 2 fixed on one side of the base 1, the adjusting structure 2 including fixed seats 26 fixed to both sides of the bottom end of the base 1, a hydraulic cylinder 21 hinged to one end of each fixed seat 26, a rotating shaft 24 disposed on one side of the top of the base 1, support plates 25 sleeved on the outer sides of both ends of the rotating shaft 24, and swing arms 23 fixed to both ends of the rotating shaft 24, with one end of each swing arm 23 having a support plate 25 mounted on the outer side of each swing arm 24. The hydraulic cylinder 21 is a double-acting cylinder with a hinged connecting rod 22. The top end of the hydraulic cylinder 21 is hinged to the bottom end of the swing arm 23, and the bottom end of the connecting rod 22 is hinged to the top end of the traction hook body 3. One side of the support plate 25 is fixedly connected to one side of the base 1, and one side of the fixed seat 26 is hinged to one side of the traction hook body 3. The oil inlet of the distributor 5 is connected to the tractor hydraulic pump, and the oil outlet of the distributor 5 is connected to the oil port of the hydraulic cylinder 21 through a connecting pipe. The distributor 5 is electromagnetically controlled.

[0019] Reference Figure 1 , Figure 2 and Figure 4As shown, a distributor 5 is installed in the tractor cab, which also has a button control panel. The driver operates the distributor 5 from inside the cab, controlling the flow of hydraulic oil into or out of the hydraulic cylinder 21. When the piston rod of the hydraulic cylinder 21 extends, the hydraulic cylinder 21 drives the swing arm 23 to move upward. The swing arm 23 drives the rotating shaft 24 to rotate inside the support plate 25, and at the same time, it drives the tow hook body 3 to lift upward through the connecting rod 22. One end of the tow hook body 3 swings on one side of the fixed seat 26, thereby changing the height of the tow hook body 3. By controlling the extension and retraction of the hydraulic cylinder 21 through the distributor 5, the labor intensity is reduced and the preparation time for hooking is shortened. The smooth power and stepless adjustment capability provided by the hydraulic system enable the tow hook body 3 to be accurately aligned with the hooking point, effectively reducing repeated attempts, hooking failures and mechanical wear caused by height deviation.

[0020] Both sides of the bottom end of the base 1 are provided with a traction hook body 3. One side of the traction hook body 3 is provided with a connecting structure 4. The connecting structure 4 includes a through hole 41, a threaded sleeve 42, a first chain 43, a threaded post 44, and a second chain 45. The through hole 41 penetrates one side of the traction hook body 3. The second chain 45 is fixed to one side of the traction hook body 3, and the first chain 43 is fixed to the other side of the traction hook body 3. The bottom end of the first chain 43 is fixed with a threaded sleeve 42, and the bottom end of the second chain 45 is fixed with a threaded post 44. The threaded post 44 and the traction hook body 3 form a sliding structure through the through hole 41, and the threaded post 44 and the threaded sleeve 42 are meshed and connected.

[0021] Reference Figure 1 , Figure 5 and Figure 6 As shown, under the action of the first chain 43 and the second chain 45, the threaded sleeve 42 and the threaded post 44 are prevented from being lost. When the traction hook body 3 is aligned with the engagement point, the threaded post 44 is moved so that it passes through the through hole 41 and the engagement point. At this time, the threaded sleeve 42 is moved so that one end of the threaded sleeve 42 abuts against one end of the threaded post 44. The threaded sleeve 42 is rotated clockwise so that the threaded sleeve 42 and the threaded post 44 are mechanically locked. Under the action of the threaded sleeve 42 and the threaded post 44, the engagement is completed. The threaded sleeve 42 is rotated counterclockwise so that the threaded sleeve 42 and the threaded post 44 are separated, thus ending the engagement.

[0022] A fixing structure 6 is fixed to the side of the base 1 away from the adjusting structure 2. The fixing structure 6 includes a fixing plate 61, a mounting base 62, a mounting groove 63, and a reinforcing rib 64. The fixing plate 61 is fixed to one side of the base 1. The mounting base 62 is fixed to one side of the fixing plate 61. The mounting groove 63 runs through both sides of the inside of the mounting base 62. The reinforcing rib 64 is evenly fixed to the bottom end of the mounting base 62. One side of the reinforcing rib 64 is fixedly connected to one side of the fixing plate 61.

[0023] Reference Figure 3 , Figure 7 and Figure 8 As shown, the mounting slot 63 connects and fixes the mounting base 62 to the tractor rear axle, rigidly integrating the base 1 with the rear axle. This also facilitates the adaptation of mounting holes for different tractor rear axle models. The reinforcing rib 64 enhances the structural strength and rigidity, preventing the fixing plate 61 and mounting base 62 from bending, deforming, or breaking under high traction and frequent lifting impacts, thereby improving the service life and safety of the device.

[0024] A control method for a tractor hydraulic lifting tow hook includes the following steps: S1. Under the action of the mounting groove 63, the mounting seat 62 is connected and fixed to the rear axle of the tractor, and at the same time, it is easy to adapt to the mounting hole positions of different models of tractor rear axles. Under the action of the reinforcing rib 64, it is used to improve the structural strength and rigidity, and prevent the fixing plate 61 and the mounting seat 62 from bending, deforming or breaking under large traction force and frequent lifting impact. S2. The driver operates the distributor 5 in the cab, so that the distributor 5 controls the flow of hydraulic oil into or out of the hydraulic cylinder 21; S3. When the piston rod of the hydraulic cylinder 21 extends or retracts, the hydraulic cylinder 21 will drive the swing arm 23 to move up and down. The swing arm 23 will drive the rotating shaft 24 to rotate inside the support plate 25. At the same time, it will drive the traction hook body 3 to rise and fall through the connecting rod 22. One end of the traction hook body 3 will swing up and down on one side of the fixed seat 26, thereby changing the height of the traction hook body 3. The extension and retraction of the hydraulic cylinder 21 is controlled by the distributor 5, which reduces labor intensity and shortens the preparation time for hooking. The smooth power and stepless adjustment capability provided by the hydraulic system enable the traction hook body 3 to be accurately aligned with the hooking point, effectively reducing repeated attempts, hooking failures and mechanical wear caused by height deviation. S4. When the towing hook body 3 is aligned with the engagement point, stop operating the distributor 5, complete the height adjustment, move the threaded post 44 so that the threaded post 44 passes through the through hole 41 and the engagement point, then move the threaded sleeve 42 so that one end of the threaded sleeve 42 abuts against one end of the threaded post 44, rotate the threaded sleeve 42 clockwise so that the threaded sleeve 42 and the threaded post 44 are mechanically locked, and the engagement is completed under the action of the threaded sleeve 42 and the threaded post 44.

[0025] 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 hydraulic lifting tow hook for a tractor, comprising a base (1); Its features are: A distributor (5) is provided above the base (1). An adjustment structure (2) is fixed on one side of the base (1). The adjustment structure (2) includes a fixed seat (26) fixed on both sides of the bottom end of the base (1). A hydraulic cylinder (21) is hinged to one end of the fixed seat (26). A rotating shaft (24) is provided on one side of the top of the base (1). A support plate (25) is sleeved on the outer side of both ends of the rotating shaft (24). A swing arm (23) is fixed to both ends of the rotating shaft (24). A connecting rod (22) is hinged to one end of the swing arm (23). Both sides of the bottom end of the base (1) are provided with traction hook bodies (3); A connecting structure (4) is provided on one side of the inside of the traction hook body (3), and a fixing structure (6) is fixed on the side of the base (1) away from the adjustment structure (2).

2. The tractor hydraulic lifting tow hook according to claim 1, characterized in that: The hydraulic cylinder (21) is a double-acting cylinder. The top end of the hydraulic cylinder (21) is hinged to the bottom end of the swing arm (23), and the bottom end of the connecting rod (22) is hinged to the top end of the traction hook body (3).

3. The tractor hydraulic lifting tow hook according to claim 1, characterized in that: One side of the support plate (25) is fixedly connected to one side of the base (1), and one side of the fixed seat (26) is hinged to one side of the traction hook body (3).

4. A tractor hydraulic lifting tow hook according to claim 1, characterized in that: The connecting structure (4) includes a through hole (41), a threaded sleeve (42), a first chain (43), a threaded post (44), and a second chain (45). The through hole (41) penetrates one side of the traction hook body (3). The second chain (45) is fixed on one side of the traction hook body (3), and the first chain (43) is fixed on the other side of the traction hook body (3). The threaded sleeve (42) is fixed at the bottom of the first chain (43), and the threaded post (44) is fixed at the bottom of the second chain (45).

5. A tractor hydraulic lifting tow hook according to claim 4, characterized in that: The threaded post (44) and the traction hook body (3) form a sliding structure through the through hole (41), and the threaded post (44) and the threaded sleeve (42) are engaged and connected.

6. A tractor hydraulic lifting tow hook according to claim 1, characterized in that: The oil inlet of the distributor (5) is connected to the hydraulic pump of the tractor, and the oil outlet of the distributor (5) is connected to the oil port of the hydraulic cylinder (21) through a connecting pipe.

7. A tractor hydraulic lifting tow hook according to claim 1, characterized in that: The distributor (5) is electromagnetically controlled.

8. A tractor hydraulic lifting tow hook according to claim 1, characterized in that: The fixing structure (6) includes a fixing plate (61), a mounting base (62), a mounting groove (63), and a reinforcing rib (64). The fixing plate (61) is fixed to one side of the base (1). The mounting base (62) is fixed to one side of the fixing plate (61). The mounting groove (63) runs through both sides of the inside of the mounting base (62). The reinforcing rib (64) is evenly fixed to the bottom end of the mounting base (62).

9. A tractor hydraulic lifting tow hook according to claim 8, characterized in that: One side of the reinforcing rib (64) is fixedly connected to one side of the fixing plate (61).

10. A control method for a tractor hydraulic lifting tow hook, comprising the following steps, characterized in that: S1. Under the action of the mounting groove (63), the mounting seat (62) is connected and fixed to the rear axle of the tractor. At the same time, it is easy to adapt to the mounting hole positions of the rear axle of different models of tractors. Under the action of the reinforcing rib (64), it is used to improve the structural strength and rigidity, and prevent the fixing plate (61) and mounting seat (62) from bending, deforming or breaking under large traction force and frequent lifting impact. S2. The driver operates the distributor (5) in the cab, so that the distributor (5) controls the flow of hydraulic oil into or out of the hydraulic cylinder (21). S3. When the piston rod of the hydraulic cylinder (21) extends and retracts, the hydraulic cylinder (21) will drive the swing arm (23) to move up and down. The swing arm (23) will drive the rotating shaft (24) to rotate inside the support plate (25). At the same time, it will drive the traction hook body (3) to rise and fall through the connecting rod (22). One end of the traction hook body (3) will swing up and down on one side of the fixed seat (26), thereby changing the height of the traction hook body (3). The extension and retraction of the hydraulic cylinder (21) is controlled by the distributor (5), which reduces the labor intensity and shortens the preparation time for hooking. The smooth power and stepless adjustment capability provided by the hydraulic system enable the traction hook body (3) to be accurately aligned with the hooking point, effectively reducing repeated attempts, hooking failures and mechanical wear caused by height deviation. S4. When the traction hook body (3) is aligned with the hook point, stop operating the distributor (5) and complete the height adjustment. Move the threaded column (44) so ​​that the threaded column (44) passes through the through hole (41) and the hook point. At this time, move the threaded sleeve (42) so that one end of the threaded sleeve (42) abuts against one end of the threaded column (44). Rotate the threaded sleeve (42) clockwise so that the threaded sleeve (42) and the threaded column (44) achieve mechanical locking. Under the action of the threaded sleeve (42) and the threaded column (44), the hooking is completed.

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