Tow frame for driving a harrow

Abstract

The utility model relates to the field of traction frame, especially drive the traction frame of harrow. Including middle part frame, the main suspension of middle part frame front end is fixed, and both sides of middle part frame are respectively connected with left side frame, right side frame rotation, and left side frame, right side frame are respectively connected with one end of hydraulic cylinder rotation, and the other end of hydraulic cylinder is connected with middle part frame rotation, and hydraulic cylinder sets up in the inside of middle part frame, and the top of middle part frame is connected locking structure, and locking structure is connected with left side frame, right side frame upper hook, and middle part frame, left side frame, right side frame are set up respectively and limit structure, set up in the inside of middle part frame with hydraulic cylinder, one end is connected with middle part frame rotation, and the other end is connected with left side frame or right side frame rotation, not easy to be damaged, and the stroke of hydraulic cylinder is shorter compared with the outside of hydraulic cylinder setting, and the length of hydraulic cylinder reduces, saves outside space, and the structure is more compact.

Description

Technical Field

[0001] This utility model relates to the field of traction frames, specifically a traction frame for driving rakes. Background Technology

[0002] A drive harrow is an agricultural tillage machine used for loosening soil, etc. When in use, the drive harrow needs to be connected to a tractor. A suitable drawbar is required, that is, the drive harrow is fixed to the bottom of the drawbar, and the drawbar is connected to the tractor through a connecting structure. When using a drive harrow with a larger width, in order to enable the tractor with the drive harrow to move on conventional roads, a two-section drive harrow is often used. That is, the two sections of the drive harrow are connected to a retractable drawbar. In the non-working state, the drive harrow can be raised along with the drawbar, reducing the width occupied.

[0003] The existing type of traction frame has the jacks set on the outside sides and connected to the left and right sides of the frame respectively. The jacks are exposed to the outside during operation and are easily damaged. Utility Model Content

[0004] The purpose of this invention is to provide a traction frame for driving a rake, so as to solve the problem mentioned in the background art that the jacks of the traction frame are exposed and easily damaged.

[0005] To achieve the above objectives, this utility model provides the following technical solution: The driving frame for the rake includes a central frame, with a main suspension fixed at the front end of the central frame. The two sides of the central frame are rotatably connected to the left and right frames, respectively. The left and right frames are rotatably connected to one end of a hydraulic cylinder, and the other end of the hydraulic cylinder is rotatably connected to the central frame. The hydraulic cylinder is located inside the central frame. A locking structure is connected to the top of the central frame, and the locking structure is hooked to the left and right frames. Limiting structures are provided for the central frame, left frame, and right frame.

[0006] Preferably, the hydraulic cylinders comprise two sets, each set containing at least one hydraulic cylinder, and the two sets of hydraulic cylinders are staggered inside the central frame.

[0007] Preferably, the main suspension includes two lugs, and a secondary suspension is connected to the upper front end of the middle frame.

[0008] Preferably, the locking structure includes a T-shaped frame fixed to the top of the central frame, with each side of the T-shaped frame rotatably connected to one end of two arms. Springs are fitted on the arms, and the other end of the arms is rotatably connected to a hook rod, which is hooked to a locking hole on the side of the left or right frame.

[0009] Preferably, the left and right frames are rotatably connected to the middle frame via connecting shafts. Limiting grooves are provided on the left and right frames respectively. The limiting grooves slide relative to the limiting crossbars fixed on the middle frame. Limiting inclined columns are fixed on the middle frame, and the limiting inclined columns abut against the left and right frames respectively.

[0010] Compared with the prior art, the beneficial effects of this utility model are: The hydraulic cylinder is located inside the central frame, with one end rotatably connected to the central frame and the other end rotatably connected to the left or right frame. This design makes it less susceptible to damage, and the stroke of the hydraulic cylinder is shorter compared to those with externally located hydraulic cylinders. This reduces the length of the hydraulic cylinder, saves external space, and makes the structure more compact. Safety hooks are provided, and grooves corresponding to the hooks are set on the left and right traction frames. This way, even if the jack or other power source fails after the traction frame is raised, it can still be hooked and will not fall suddenly, making it safer. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of the present invention in its folded state; Figure 3 This is a schematic diagram of the internal structure of the left side frame and the middle frame of this utility model; In the diagram: 1. Middle frame; 11. Lifting lug; 12. Limiting inclined column; 13. Limiting horizontal column; 14. Subsidiary suspension; 2. Left side frame; 21. Limiting groove; 22. Extension plate; 3. Right side frame; 31. Locking hole; 4. Locking structure; 41. T-shaped frame; 42. Arm; 43. Spring; 44. Hook rod; 5. Hydraulic cylinder; 6. Connecting shaft. Detailed Implementation

[0012] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0013] Example

[0014] like Figure 1-3As shown, the drive frame for the harrow includes a central frame 1. A connecting shaft 6 is installed inside the central frame 1. The left side frame 2 and right side frame 3 are rotatably connected to the central frame 1 via a connecting shaft 6. Inside the central frame 1, there is a hydraulic cylinder 5, one end of which is rotatably connected to the central frame 1, and the other end of which is rotatably connected to either the left side frame 2 or the right side frame 3. There are two sets of hydraulic cylinders 5, one in each set. The number of cylinders in each set can be increased as needed. The two sets of hydraulic cylinders 5 are staggered and are used to drive the left side frame 2 and right side frame 3 to rotate relative to the central frame 1. In the working state, the tractor's drive unit connects to the hydraulic cylinders 5, controlling their retraction to bring the left side frame 2 and right side frame 3 into a horizontal position. The drive harrow connected to the left side frame 2 and right side frame 3 is also in a horizontal position. Figure 1 As shown, the tractor's suspension is connected to the lug 11 and the sub-suspension 14 respectively. The tractor controls the lifting and lowering of the traction frame, thereby driving the harrow to lift and lower to achieve land leveling. At this time, the limiting groove 21 on the left frame 2 and the right frame 3 slides to the contact state relative to the limiting cross post 13, so that the left frame 2 and the right frame 3 remain in a stable position, that is, the limiting cross post 13 is located in the limiting groove 21 and the limiting cross post 13 is in contact with the innermost end of the limiting groove 21.

[0015] When the drive rake is not in operation, control the left frame 2 and right frame 3 to lift, so that the drive rake is in a vertical position, such as... Figure 2 As shown, at this time, the limiting inclined column 12 abuts against the sides of the left frame 2 and the right frame 3 to limit the movement, preventing the hydraulic cylinder 5 from raising the left and right traction frames too high inside. At the same time, the outer arc surface of the hook rod 44 is squeezed by the left frame 2 or the right frame 3 and rotates upward relative to the middle frame 1. When it rotates to be aligned with the lock hole 31, the arm 42 is a telescopic rod. The other end of the arm rod 42 is rotatably connected to the T-shaped frame 41, and a spring 43 is sleeved on it. Under the elastic force of the spring 43, the arm rod 42 extends, causing the hook rod 44 to rotate downward. The inner side of the hook rod 44 hooks into the inside of the lock hole 31, as shown. Figure 3 As shown, after the left frame 2 and right frame 3 are raised, even if the power source such as the jack malfunctions, they can still hook onto the traction frame and will not suddenly fall, making it safer.

[0016] The middle frame 1 includes a front end plate, a rear end plate, and a bottom plate that are fixedly connected. Figure 3The internal structure of the middle frame 1 with the front end plate removed is shown. The bottom end of the hydraulic cylinder 5 connecting the left frame 2 is rotatably connected to a shaft, which is fixed to the front end plate. The lifting lug 11 is fixed to the front end plate and the lower end plate. The lifting lug 11 is fixedly connected to the rear end plate with a limiting cross column 13. The hydraulic cylinder 5 connecting the right frame 3 and the hydraulic cylinder 5 connecting the left frame 2 are staggered in the same connection method. The left frame 2 and the right frame 3 respectively include a front side plate, a rear side plate, a connecting plate, and a V-shaped plate with a locking hole 31. The connecting plate is provided with multiple bolt holes for connecting the drive rake. The connecting plate is also connected to an extension plate 22 to increase the connection surface. Ribs are also provided inside the left frame 2 and the right frame 3 to connect the plates on the four sides and improve the strength of the left frame 2 and the right frame 3.

[0017] The above are merely embodiments of this utility model and do not limit the scope of this utility model patent. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of this utility model.

Claims

1. A traction frame for driving a rake, characterized in that, The system includes a central frame (1), with a main suspension fixed at the front end of the central frame (1). The two sides of the central frame (1) are rotatably connected to the left side frame (2) and the right side frame (3) respectively. The left side frame (2) and the right side frame (3) are rotatably connected to one end of a hydraulic cylinder (5) respectively. The other end of the hydraulic cylinder (5) is rotatably connected to the central frame (1). The hydraulic cylinder (5) is located inside the central frame (1). The top of the central frame (1) is connected to a locking structure (4). The locking structure (4) is hooked to the left side frame (2) and the right side frame (3). The central frame (1), the left side frame (2), and the right side frame (3) are each provided with a limit structure.

2. The traction frame for driving the rake according to claim 1, characterized in that, The hydraulic cylinder (5) includes two sets, with at least one hydraulic cylinder (5) in each set, and the two sets of hydraulic cylinders (5) are staggered inside the central frame (1).

3. The traction frame for driving the rake according to claim 1, characterized in that, The main suspension includes two lugs (11), and the upper front end of the middle frame (1) is connected to a secondary suspension (14).

4. The traction frame for driving the rake according to claim 1, characterized in that, The locking structure (4) includes a T-shaped frame (41) fixed to the top of the middle frame (1). The two sides of the T-shaped frame (41) are rotatably connected to one end of two arms (42). A spring (43) is sleeved on the arm (42). The other end of the arm (42) is rotatably connected to a hook (44). The hook (44) is hooked to the locking hole (31) on the side of the left frame (2) or the right frame (3).

5. The traction frame for driving the rake according to claim 1, characterized in that, The left side frame (2) and right side frame (3) are rotatably connected to the middle frame (1) via connecting shaft (6). Limiting grooves (21) are provided on the left side frame (2) and right side frame (3). The limiting grooves (21) slide relative to the limiting horizontal column (13) fixed on the middle frame (1). Limiting inclined column (12) is fixed on the middle frame (1). The limiting inclined column (12) abuts against the left side frame (2) and right side frame (3) respectively.

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