A trailer frame for an agricultural implement

Abstract

The utility model relates to agricultural machinery technical field, concretely is a trailer frame of agricultural machine, including chassis and install two wheel assemblies in the front -rear direction of chassis, the chassis includes the wheel hub at four corners, is fixed with a transverse plate between two wheel hubs of the same side of front and back, the front side of two wheel hubs of rear side integral molding has an inner connecting rod, the front end of inner connecting rod inserts the inside slide connection of outer connecting rod, the utility model discloses the slide connection cooperation threaded rod drive between inner connecting rod and outer connecting rod, realizes the adjustment of trailer frame overall length, satisfies the demand of trailer carrying space and connecting distance under different agricultural scene, simultaneously, the wheel assembly adopts the double shock attenuation structure of shock absorber and shock attenuation spring combination, effectively buffers the bump in the course of driving, promotes the stability of trailer operation, reduces the damage of the structure of trailer frame and the goods carried to the vibration.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery technology, specifically to a trailer frame for a farming machine. Background Technology

[0002] In agricultural production operations, the agricultural machinery trailer is an important supporting equipment, mainly used to carry agricultural materials, agricultural tools or crops, and realizes the field transportation function by connecting with agricultural main units such as tractors and harvesters.

[0003] However, existing agricultural machinery trailer frames have many limitations in actual use: First, traditional trailer frames are mostly fixed-length structures, which cannot flexibly adjust the load-bearing space according to the needs of agricultural scenarios. When it is necessary to transport agricultural tools or crops of different sizes, fixed-length trailer frames often suffer from insufficient space or low utilization rate. Second, relying solely on the elasticity of the tires to buffer vibrations is difficult to effectively absorb the impact of bumps, which can cause the loaded items to shake, fall off, or even be damaged.

[0004] In view of this, we propose a trailer frame for a farming machine. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a trailer frame for an agricultural tiller.

[0006] The technical solution of this utility model is:

[0007] A trailer frame for an agricultural tiller includes a chassis and two wheel assemblies mounted in the front-rear direction of the chassis. The chassis includes wheel hubs located at the four corners. A cross plate is fixed between the two wheel hubs located on the same front and rear sides. An outer connecting rod is integrally formed on the front two wheel hubs, and an inner connecting rod is integrally formed on the front side of the two rear wheel hubs. The front end of the inner connecting rod is slidably inserted into the interior of the outer connecting rod. A threaded rod that is threadedly connected to the inner connecting rod is rotatably connected inside the outer connecting rod. A drive shaft is rotatably connected between the two outer connecting rods. Both ends of the drive shaft are respectively driven to the front ends of the two threaded rods through a bevel gear set. A crank handle is installed at one end of the drive shaft.

[0008] The wheel assembly includes a mounting plate and tires that are rotatably mounted on both sides of the mounting plate via a wheel axle. Several equally spaced shock absorbers are fixedly mounted on the top of the mounting plate, and a shock-absorbing spring is provided on the outer top surface of each shock absorber. The cross plate is fixed to the piston rod of the shock absorber. The two ends of the shock-absorbing spring are fixedly connected to the bottom of the cross plate and the top of the mounting plate, respectively. A trailer rod is hinged to one of the cross plates.

[0009] In use, the sliding connection between the inner and outer connecting rods, combined with the threaded rod transmission, allows for adjustment of the overall length of the trailer frame, meeting the needs of different agricultural scenarios for trailer carrying space and connection distance. Meanwhile, the wheel assembly adopts a dual shock absorption structure combining shock absorbers and shock-absorbing springs, effectively buffering bumps during driving, improving the stability of trailer operation, and reducing damage to the trailer frame structure and the load caused by vibration. The articulated trailer bar enhances the flexibility of connection with agricultural machinery.

[0010] As a preferred technical solution, a cargo box is provided on the chassis. The cargo box is divided into two sections that are plugged together and fixed to two contours on the front side and two contours on the rear side, respectively, to ensure that the cargo box always maintains its complete load-bearing function when the length of the trailer frame changes.

[0011] As a preferred technical solution, one section of the carriage has an integrally formed insert plate, while the other section has a slot for insertion and mating with the insert plate. This achieves the carriage extension and retraction function while ensuring the stability of the connection between the two sections.

[0012] As a preferred technical solution, a connecting plate is hinged to one end of the trailer rod near the cross plate. The connecting plate is horizontal and fixedly connected to the cross plate. A connecting ring is hinged to the other end of the trailer rod away from the connecting plate, and the connecting ring has a pin hole. The trailer rod is fixed to the cross plate via the connecting plate, enhancing the stability of the connection between the trailer rod and the chassis. The design of the connecting ring and pin hole at the end facilitates a quick and secure connection with the agricultural machinery.

[0013] As a preferred technical solution, an annular protrusion is integrally formed on the inner wall of the front end of the outer connecting rod. The annular protrusion is rotatably connected to the outer side of the front end of the threaded rod via a bearing, and the annular protrusion is located on the side near the bevel gear set. The annular protrusion provides stable support for the threaded rod.

[0014] As a preferred technical solution, the bevel gear set includes a first bevel gear and a second bevel gear that mesh with each other. The inner surface of the first bevel gear is coaxially fixed with the outer surface of the transmission shaft, and the second bevel gear is coaxially fixed with the front end of the threaded rod. The bevel gear set, composed of the meshing first and second bevel gears, realizes the vertical transmission between the transmission shaft and the threaded rod, enabling the rotational motion of the crank handle to be efficiently converted into the rotational motion of the threaded rod, thereby driving the inner connecting rod and the outer connecting rod to slide relative to each other.

[0015] As a preferred technical solution, the length of the insert plate on the trailer body is greater than the length of the inner connecting rod, and the inner connecting rod never disengages from the outer connecting rod when the crank handle is turned. On the one hand, this ensures that the insert plate can still maintain effective engagement with the slot when the trailer frame is at its maximum adjustment length, guaranteeing the integrity and load-bearing capacity of the trailer body structure; on the other hand, it avoids structural failure caused by the separation of the inner and outer connecting rods, improving the safety and reliability of the trailer frame adjustment process.

[0016] As a preferred technical solution, the end of the connecting plate away from the horizontal plate extends to the front outer side of the carriage, avoiding obstruction of the carriage from the connection operation between the trailer rod and the tiller, and providing sufficient operating space for the docking of the connecting ring and the tiller.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] This invention utilizes a sliding connection between the inner and outer connecting rods, coupled with a threaded rod transmission, to achieve adjustment of the overall length of the trailer frame, meeting the needs for trailer carrying space and connection distance in different agricultural scenarios. Simultaneously, the wheel assembly employs a dual shock absorption structure combining shock absorbers and shock-absorbing springs, effectively buffering bumps during travel, improving the stability of the trailer operation, and reducing damage to the trailer frame structure and carried goods caused by vibration. The articulated trailer bar enhances the flexibility of connection with agricultural machinery. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the present invention after the entire carriage has been removed;

[0021] Figure 3 This is a left view of the chassis and wheel assembly in this utility model;

[0022] Figure 4 This is a schematic diagram of the internal structure of the outer connecting rod and the inner connecting rod in this utility model;

[0023] The meanings of the labels in the diagram are as follows:

[0024] 1. Chassis; 10. Outline; 11. Outer connecting rod; 12. Inner connecting rod; 13. Cross plate; 14. Threaded rod; 15. Drive shaft; 16. First bevel gear; 17. Second bevel gear; 18. Annular protrusion; 2. Cargo box; 20. Slot; 21. Insert plate; 3. Trailer arm; 30. Connecting plate; 31. Connecting ring; 4. Tire; 40. Axle; 41. Mounting plate; 5. Handle; 6. Shock absorber; 60. Shock absorber spring. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-4 This utility model provides a technical solution:

[0027] A trailer frame for an agricultural tiller includes a chassis 1 and two wheel assemblies mounted in the front-rear direction of the chassis 1. The chassis 1 includes wheel hubs located at the four corners. A cross plate 13 is fixed between the two wheel hubs located on the same front and rear sides. An outer connecting rod 11 is integrally formed on the two front wheel hubs. The outer connecting rod 11 is a hollow tubular structure. An inner connecting rod 12 is integrally formed on the front side of the two rear wheel hubs. The front end of the inner connecting rod 12 is inserted into the outer connecting rod 11 and slidably connected. A threaded rod 14 is rotatably connected inside the outer connecting rod 11 and threadedly connected to the inner connecting rod 12. The front end of the inner connecting rod 12 is sleeved on the outer rear end of the threaded rod 14. A drive shaft 15 is rotatably connected between the two outer connecting rods 11. Both ends of the drive shaft 15 are respectively connected to the front ends of the two threaded rods 14 through a bevel gear set. A crank handle 5 is installed at one end of the drive shaft 15.

[0028] The wheel assembly includes a mounting plate 41 and tires 4 rotatably mounted on both sides of the mounting plate 41 via axles 40. Several equally spaced shock absorbers 6 are fixedly mounted on the top of the mounting plate 41, and a shock-absorbing spring 60 is provided on the outer side of the top surface of each shock absorber 6. A cross plate 13 is fixed to the piston rod of the shock absorber 6. The two ends of the shock-absorbing spring 60 are fixedly connected to the bottom of the cross plate 13 and the top of the mounting plate 41, respectively. A trailer rod 3 is hingedly mounted on one of the cross plates 13.

[0029] In use, the sliding connection between the inner connecting rod 12 and the outer connecting rod 11, combined with the threaded rod 14, enables the adjustment of the overall length of the trailer frame, meeting the needs of different agricultural scenarios for trailer carrying space and connection distance. At the same time, the wheel assembly adopts a dual shock absorption structure combining shock absorber 6 and shock-absorbing spring 60, which effectively buffers the bumps during driving, improves the stability of trailer operation, and reduces damage to the trailer frame structure and the load caused by vibration. The articulated trailer rod 3 enhances the flexibility of connection with the agricultural machine.

[0030] As a preferred embodiment, a carriage 2 is provided on the chassis 1. The carriage 2 is divided into two sections that are connected by a plug-in joint, and is fixed to the two contours 10 on the front side and the two contours 10 on the rear side respectively, so as to ensure that the carriage 2 always maintains its complete load-bearing function when the length of the trailer frame changes.

[0031] In a preferred embodiment, one section of the carriage 2 has an integrally formed insert plate 21, and the other section of the carriage 2 has a slot 20 that engages with the insert plate 21. This achieves the telescopic function of the carriage 2 while ensuring the stability of the connection between the two sections of the carriage 2.

[0032] In a preferred embodiment, a connecting plate 30 is hinged to one end of the trailer rod 3 near the cross plate 13. The connecting plate 30 is horizontal and fixedly connected to the cross plate 13. A connecting ring 31 is hinged to one end of the trailer rod 3 away from the connecting plate 30, and the connecting ring 31 has a pin hole. The trailer rod 3 is fixed to the cross plate 13 by the connecting plate 30, which enhances the stability of the connection between the trailer rod 3 and the chassis 1. The design of the connecting ring 31 and the pin hole at the end facilitates a quick and secure connection with the agricultural machinery.

[0033] In a preferred embodiment, the inner wall of the front end of the outer connecting rod 11 is integrally formed with an annular protrusion 18. The annular protrusion 18 is rotatably connected to the outer side of the front end of the threaded rod 14 via a bearing, and the annular protrusion 18 is located on the side near the bevel gear set. The annular protrusion 18 provides stable support for the threaded rod 14.

[0034] In a preferred embodiment, the bevel gear set includes a first bevel gear 16 and a second bevel gear 17 that mesh with each other. The inner side of the first bevel gear 16 is coaxially fixed with the outer side of the transmission shaft 15, and the front end of the second bevel gear 17 is coaxially fixed with the threaded rod 14. The bevel gear set, composed of the meshing first bevel gear 16 and the second bevel gear 17, realizes the vertical transmission between the transmission shaft 15 and the threaded rod 14, so that the rotational motion of the crank handle 5 can be efficiently converted into the rotational motion of the threaded rod 14, thereby driving the inner connecting rod 12 and the outer connecting rod 11 to slide relative to each other.

[0035] In this preferred embodiment, the length of the insert plate 21 on the trailer 2 is greater than the length of the inner connecting rod 12, and the inner connecting rod 12 never disengages from the outer connecting rod 11 when the crank handle 5 is turned. In use, this ensures that the insert plate 21 remains effectively connected to the slot 20 even at the maximum adjustment length of the trailer frame, guaranteeing the structural integrity and load-bearing capacity of the trailer 2; furthermore, it avoids structural failure caused by the separation of the inner connecting rod 12 from the outer connecting rod 11, improving the safety and reliability during trailer frame adjustment.

[0036] As a preferred embodiment, the end of the connecting plate 30 away from the horizontal plate 13 extends to the outer front end of the carriage 2, which avoids the carriage 2 from obstructing the connection operation between the trailer bar 3 and the tiller, and provides sufficient operating space for the docking of the connecting ring 31 and the tiller.

[0037] Before use, the trailer frame of this utility model can be adjusted by rotating the crank handle 5 at one end of the drive shaft 15 according to the load-bearing space required for agricultural operations and the connection distance with the agricultural machine. The crank handle 5 drives the drive shaft 15 to rotate, and the drive shaft 15 transmits power to the threaded rod 14 inside the outer connecting rod 11 on both sides through the meshing of the first bevel gear 16 and the second bevel gear 17 at both ends of the bevel gear set. When the threaded rod 14 rotates, it forms a threaded transmission with the inner connecting rod 12, causing the inner connecting rod 12 to slide along the outer connecting rod 11, thereby changing the distance between the front and rear wheel hubs and realizing the adjustment of the length of the chassis 1. At the same time, the two sections of the carriage 2, which are fixed to the front and rear wheel hubs respectively, extend and retract synchronously through the insertion structure of the insert plate 21 and the slot 20.

[0038] When connecting the agricultural machinery, the connecting ring 31 at the end of the trailer boom 3 and the pin hole are used to quickly fix it to the agricultural machinery via a pin. During operation, the wheel assembly buffers the bumps during driving through the dual action of the shock absorber 6 and the shock-absorbing spring 60: when the trailer frame encounters an uneven road surface, the vibration is transmitted to the mounting plate 41 through the tire 4. The piston rod of the shock absorber 6 contracts or extends, and the elastic deformation of the shock-absorbing spring 60 absorbs the impact force, reducing the impact of vibration on the chassis 1, the cargo box 2 and the loaded goods, and improving the overall operating stability.

[0039] Through the synergistic effect of the above structures, the trailer frame achieves comprehensive functions such as adjustable length, convenient connection, and stable driving, meeting the usage needs of different farming scenarios.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A trailer frame for a farming machine, characterized in that: The chassis (1) includes a chassis (1) and two wheel assemblies mounted in the front and rear directions of the chassis (1). The chassis (1) includes wheel hubs located at the four corners. A cross plate (13) is fixed between the two wheel hubs located on the same front and rear sides. An outer connecting rod (11) is integrally formed on the two wheel hubs located on the front side, and an inner connecting rod (12) is integrally formed on the front side of the two wheel hubs located on the rear side. The front end of the inner connecting rod (12) is inserted into the outer connecting rod (11) and slidably connected. A threaded rod (14) is rotatably connected inside the outer connecting rod (11) and threadedly connected to the inner connecting rod (12). A drive shaft (15) is rotatably connected between the two outer connecting rods (11). Both ends of the drive shaft (15) are respectively connected to the front ends of the two threaded rods (14) through a bevel gear set. A crank handle (5) is installed at one end of the drive shaft (15). The wheel assembly includes a mounting plate (41) and tires (4) rotatably mounted on both sides of the mounting plate (41) via axles (40). Several equally spaced shock absorbers (6) are fixedly mounted on the top of the mounting plate (41), and a shock-absorbing spring (60) is provided on the outer side of the top surface of each shock absorber (6). The cross plate (13) is fixed to the piston rod of the shock absorber (6), and the two ends of the shock-absorbing spring (60) are fixedly connected to the bottom of the cross plate (13) and the top of the mounting plate (41) respectively. A trailer rod (3) is hinged on one of the cross plates (13).

2. The trailer frame of the agricultural tiller as described in claim 1, characterized in that: The chassis (1) is provided with a carriage (2) on top. The carriage (2) is divided into two sections that are connected by a plug-in joint, and are respectively fixed to the two contours (10) on the front side and the two contours (10) on the rear side.

3. The trailer frame of the agricultural tiller as described in claim 2, characterized in that: One section of the carriage (2) has an integrally formed insert plate (21), and the other section of the carriage (2) has a slot (20) that is inserted and matched with the insert plate (21).

4. The trailer frame of the agricultural tiller as described in claim 3, characterized in that: A connecting plate (30) is hinged to one end of the trailer rod (3) near the horizontal plate (13). The connecting plate (30) is horizontal and fixedly connected to the horizontal plate (13). A connecting ring (31) is hinged to one end of the trailer rod (3) away from the connecting plate (30). A pin hole is provided on the connecting ring (31).

5. The trailer frame of the agricultural tiller as described in claim 4, characterized in that: The inner wall of the front end of the outer connecting rod (11) is integrally formed with an annular protrusion (18). The annular protrusion (18) is rotatably connected to the outer side of the front end of the threaded rod (14) through a bearing. The annular protrusion (18) is located on the side close to the bevel gear set.

6. The trailer frame of the agricultural tiller as described in claim 5, characterized in that: The bevel gear set includes a first bevel gear (16) and a second bevel gear (17) that are meshed together. The inner side of the first bevel gear (16) is coaxially fixed with the outer side of the transmission shaft (15), and the second bevel gear (17) is coaxially fixed with the front end of the threaded rod (14).

7. The trailer frame of the agricultural tiller as described in claim 6, characterized in that: The length of the insert plate (21) on the carriage (2) is greater than the length of the inner connecting rod (12), and the inner connecting rod (12) never disengages from the outer connecting rod (11) when the crank handle (5) is turned.

8. The trailer frame of the agricultural tiller as described in claim 7, characterized in that: The end of the connecting plate (30) away from the cross plate (13) extends to the outer front end of the carriage (2).

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