CN209983050U - Suspension device - Google Patents

Abstract

A suspension device comprises a rack and a traction unit arranged on the rack, wherein the traction unit comprises a lower pull rod, a hydraulic oil cylinder and a rotating shaft; the rotating shaft is arranged in a shaft hole arranged at the upper part of the frame and is provided with a first swing arm and a second swing arm; the lower pull rod is hinged on the lower part of the rack and is connected with the first swing arm through a connecting rod; one end of the hydraulic oil cylinder is hinged with the lower part of the frame, and the other end of the hydraulic oil cylinder is hinged with the second swing arm; the connecting point of the connecting rod and the first swing arm is a first connecting point, the connecting point of the hydraulic oil cylinder and the second swing arm is a second connecting point, and the distance between the first connecting point and the rotating shaft is smaller than or equal to the distance between the second connecting point and the rotating shaft. The suspension device connects the connecting rod and the hydraulic oil cylinder on different swing arms, so that the length of the force arm where the hydraulic oil cylinder is located is larger than or equal to that of the force arm where the connecting rod is located, the floating of the agricultural implement during moving reduces the downward pressure of the hydraulic oil cylinder through the lever action, the load of the hydraulic oil cylinder is reduced, and the service life of the hydraulic oil cylinder is prolonged.

Description

Suspension device

Technical Field

The utility model belongs to agricultural machine field especially relates to a linkage.

Background

The agricultural tractor needs to be connected with the agricultural implement to the tractor through the suspension device, so that the agricultural tractor can pull the agricultural implement to move in a farmland, and the agricultural implement can work at a correct position to adapt to the fluctuation of the ground.

The suspension device is provided with a lower pull rod, a connecting rod is connected with a swing arm, a hydraulic oil cylinder is also connected with the swing arm, and the swing arm is lifted through the stretching of the hydraulic oil cylinder to lift the lower pull rod. Because hydraulic cylinder and connecting rod all are connected in same swing arm, hydraulic cylinder is located the inboard that the connecting rod is close to the tractor, makes the distance between the fulcrum of hydraulic cylinder and swing arm be less than the distance between connecting rod and the swing arm, and then makes the resistance arm be less than the power arm, through leverage, agricultural machines will make hydraulic cylinder receive bigger holding down force to the holding down force of pull rod, increase hydraulic cylinder's load, reduce hydraulic cylinder's life.

SUMMERY OF THE UTILITY MODEL

The utility model discloses there is the great problem of hydraulic cylinder load to above-mentioned prior art, provide a little linkage of hydraulic cylinder load.

In order to achieve the purpose, the utility model provides a suspension device, which comprises a frame and a traction unit arranged on the frame, wherein the traction unit comprises a lower pull rod, a hydraulic oil cylinder and a rotating shaft;

the rotating shaft is arranged in a shaft hole formed in the upper part of the rack and is provided with a first swing arm and a second swing arm;

the lower pull rod is hinged to the lower part of the rack and is connected with the first swing arm through a connecting rod;

one end of the hydraulic oil cylinder is hinged with the lower part of the frame, and the other end of the hydraulic oil cylinder is hinged with the second swing arm;

the connecting point of the connecting rod and the first swing arm is a first connecting point, the connecting point of the hydraulic oil cylinder and the second swing arm is a second connecting point, and the distance between the first connecting point and the rotating shaft is smaller than or equal to the distance between the second connecting point and the rotating shaft.

Preferably, the connecting rod is connected to one end, far away from the rotating shaft, of the first swing arm, the hydraulic oil cylinder is connected to one end, far away from the rotating shaft, of the second swing arm, and the length of the first swing arm is smaller than or equal to that of the second swing arm.

Preferably, the second swing arm is deflected downwardly relative to the first swing arm.

Preferably, the second swing arm is located inside the first swing arm.

Preferably, the two traction units are symmetrically arranged, and rotating shafts of the two traction units are coaxial and are connected to form a symmetrical integrated structure.

Preferably, the upper part of the frame is hinged with an upper pull rod.

Compared with the prior art, the utility model discloses an advantage lies in with positive effect:

1. the suspension device connects the connecting rod and the hydraulic oil cylinder on different swing arms, so that the length of the force arm where the hydraulic oil cylinder is located is larger than or equal to that of the force arm where the connecting rod is located, the floating of the agricultural implement during moving reduces the downward pressure of the hydraulic oil cylinder through the lever action, the load of the hydraulic oil cylinder is reduced, and the service life of the hydraulic oil cylinder is prolonged.

2. The connecting rod and the hydraulic oil cylinder are connected to different swing arms, the hydraulic oil cylinder can be located on one side of the connecting rod, the space occupied by the hydraulic oil cylinder and the connecting rod in the length direction of the lower pull rod is reduced, and the whole structure of the suspension device is more compact.

3. The second swing arm deflects downwards for first swing arm, makes the tip of second swing arm more downwards to shorten hydraulic cylinder's flexible length, further reduce the volume of linkage during operation and occupy, thereby make linkage can connect the great agricultural machines of volume.

4. The second swing arm is located the inboard, makes hydraulic cylinder be located the inboard of lower link and connecting rod, forms the protection to hydraulic cylinder, prevents that hydraulic cylinder and the hydraulic line that connects from receiving the collision of external object, avoids consequently causing the damage.

5. The symmetrically arranged traction units can be respectively connected with the two sides of the agricultural machine to fully traction the agricultural machine, and the two sides of the agricultural machine can synchronously fluctuate up and down to prevent the agricultural machine from deflecting, so that the agricultural machine can stably move.

Drawings

FIG. 1 is a schematic perspective view of the present hitch assembly mounted on a tractor;

FIG. 2 is a front view of the present hitch assembly mounted on a tractor;

in the above figures: 1. a frame; 2. a lower pull rod; 3. a hydraulic cylinder; 4. a rotating shaft; 41. a first swing arm; 42. a second swing arm; 5. a connecting rod; 61. a first connection point; 62. a second connection point; 7. an upper pull rod; 8. a tractor.

Detailed Description

The present invention is specifically described below by way of exemplary embodiments. It should be understood, however, that elements, structures and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.

In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", "front", "rear", and the like indicate orientations or positional relationships based on positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As shown in fig. 1 to 2, the present invention provides a suspension device, which comprises a frame 1 and a traction unit installed on the frame 1.

The frame 1 is fixedly arranged on agricultural machines such as a tractor 7 and the like which can pull agricultural implements, and the pulling unit comprises a lower pull rod 2, a hydraulic oil cylinder 3 and a rotating shaft 4.

The rotating shaft 4 is installed in a shaft hole provided at the upper portion of the frame 1, and is provided with a first swing arm 41 and a second swing arm 42.

One end of the lower pull rod 2 is hinged on the lower part of the frame 1, and the other end is used for connecting an agricultural implement.

The traction unit further comprises a connecting rod 5, the lower pull rod 2 is connected with a first swing arm 41 through the connecting rod 5, and two ends of the connecting rod 5 are hinged with the lower pull rod 2 and the first swing arm 41 respectively.

One end of the hydraulic oil cylinder 3 is hinged with the lower part of the frame 1, and the other end is hinged with the second swing arm 42.

After the lower pull rod 2 is connected with the agricultural implement, the tractor 7 pulls the agricultural implement to move in the farmland through the lower pull rod 2, and the production operation is carried out. Because the farmland ground has fluctuation, the agricultural implement can also generate fluctuation in the moving process, so that the lower pull rod 2 swings up and down, the swinging lower pull rod 2 enables the first swing arm 41 to swing along with the first swing arm through the connecting rod 5, the first swing arm 41 enables the second swing arm 42 to swing synchronously through the rotating shaft 4, and the swinging second swing arm 42 pushes and pulls the hydraulic oil cylinder 3, so that a piston rod of the hydraulic oil cylinder 3 stretches. Through the hydraulic pressure of fluid in the hydraulic cylinder 3, the swing of second swing arm 42 forms the buffering to the swing of pull down rod 2 is cushioned, avoids pull down rod 2 acutely to swing, guarantees that towed agricultural implement moves steadily.

The connection point of the link 5 and the first swing arm 41 is a first connection point 61, and the connection point of the hydraulic cylinder 3 and the second swing arm 42 is a second connection point 62.

The distance between the first connecting point 61 and the rotating shaft 4 is smaller than or equal to the distance between the second connecting point 62 and the rotating shaft 41, so that the rotating shaft 4 is used as a lever of a fulcrum, the length of a force arm where the hydraulic oil cylinder 3 is located is larger than or equal to that of a force arm where the connecting rod 5 is located, the push-pull force transmitted to the connecting rod 5 by the agricultural machine tool through the lower pull rod 2 is reduced when the push-pull force is transmitted to the hydraulic oil cylinder 3 through the lever, the load of the hydraulic oil cylinder 3 is reduced, the piston rod is prevented from being strongly impacted, the liquid pressure in the hydraulic oil cylinder 3 is excessively large, the hydraulic oil cylinder 3 is prevented from being exploded or a hydraulic oil pipeline connected with the hydraulic oil.

In order to facilitate the reduction of the load of the hydraulic oil cylinder 3, the connecting rod 5 is connected to one end of the first swing arm 41 far away from the rotating shaft 4, so that the first connecting point 61 is positioned at the end, and the other end of the first swing arm 41 is fixedly connected with the rotating shaft 4; the hydraulic cylinder 3 is connected to one end of the second swing arm 41 far away from the rotating shaft 4, so that the second connection point 62 is located at the end, and the other end of the second swing arm 42 is fixedly connected with the rotating shaft 4.

The length of the first swing arm 41 is less than or equal to the length of the second swing arm 42, that is, the distance between the first connection point 61 and the rotation shaft 4 can be less than or equal to the distance between the second connection point 62 and the rotation shaft 41.

In order to shorten the telescopic stroke of the hydraulic oil cylinder 3, the second swing arm 42 deflects downwards relative to the first swing arm 41, one end, far away from the rotating shaft 4, of the second swing arm 42 is closer to the lower part of the frame 2, the length and the telescopic stroke of the hydraulic oil cylinder 3 between the second swing arm and the first swing arm can be shortened, and therefore the occupied space of the moving track of the second swing arm 42 and the hydraulic oil cylinder 3 during movement is reduced, the occupied volume of the suspension device during working is further reduced, the suspension device can be connected with an agricultural machine tool with a larger volume, and the influence of the moving space of components on the installation space of the agricultural machine.

In order to form the protection to hydraulic cylinder 3, second swing arm 42 is located first swing arm 41 inboard to make hydraulic cylinder 3 be located the inboard of lower link 2 and connecting rod 5, lower link 2 and connecting rod 5 separate outside object and hydraulic cylinder 3, thereby prevent that the outside object from causing the collision to hydraulic cylinder 3 and the hydraulic pressure pipeline that hydraulic cylinder 3 is connected, avoid causing the damage, improve equipment security.

The traction units are symmetrically arranged and are respectively connected with two sides of the agricultural machine tool to fully traction the agricultural machine tool, so that the agricultural machine tool can stably move.

The rotating shafts 4 of the two traction units are coaxial and are connected into a symmetrical integrated structure, so that the swing arms on the rotating shafts 4 are symmetrically arranged, the swing amplitudes of the two lower pull rods 2 are the same, the fluctuation of two sides of the agricultural implement is synchronous, the agricultural implement is prevented from inclining to one side, the agricultural implement is prevented from toppling to one side, and the moving stability of the agricultural implement is guaranteed.

In order to further and fully transmit the traction force to the agricultural implement, the upper part of the frame 1 is hinged with an upper pull rod 7, and the upper pull rod 7 is connected with the agricultural implement.

The traction unit can also be reversely arranged, the lower pull rod 2 and the hydraulic oil cylinder 3 are hinged on the upper portion of the rack 1, the rotating shaft 4 is installed on the lower portion of the rack 1, and the upper pull rod 7 is connected on the lower portion of the rack 1, so that the same working mode and technical effects are realized.

Claims (6)

1. A suspension device is characterized by comprising a rack (1) and a traction unit arranged on the rack (1), wherein the traction unit comprises a lower pull rod (2), a hydraulic oil cylinder (3) and a rotating shaft (4);

the rotating shaft (4) is arranged in a shaft hole arranged at the upper part of the rack (1) and is provided with a first swing arm (41) and a second swing arm (42);

the lower pull rod (2) is hinged to the lower part of the rack (1) and is connected with the first swing arm (41) through a connecting rod (5);

one end of the hydraulic oil cylinder (3) is hinged with the lower part of the frame (1), and the other end of the hydraulic oil cylinder is hinged with the second swing arm (42);

the connecting point of the connecting rod (5) and the first swing arm (41) is a first connecting point (61), the connecting point of the hydraulic oil cylinder (3) and the second swing arm (42) is a second connecting point (62), and the distance between the first connecting point (61) and the rotating shaft (4) is smaller than or equal to the distance between the second connecting point (62) and the rotating shaft (4).

2. The suspension device according to claim 1, wherein the connecting rod (5) is connected to one end of the first swing arm (41) far away from the rotating shaft (4), the hydraulic oil cylinder (3) is connected to one end of the second swing arm (42) far away from the rotating shaft (4), and the length of the first swing arm (41) is less than or equal to that of the second swing arm (42).

3. Suspension arrangement according to claim 1, characterized in that the second swing arm (42) is deflected downwards relative to the first swing arm (41).

4. Suspension arrangement according to claim 1, characterized in that the second swing arm (42) is located inside the first swing arm (41).

5. The suspension device according to claim 1, characterized in that the two traction units are symmetrically arranged, and the rotating shafts (4) of the two traction units are coaxial and connected to form a symmetrical integral structure.

6. Suspension arrangement according to claim 1, characterized in that the upper part of the frame (1) is hinged with an upper tie rod (7).

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