CN112205187A

CN112205187A - Bottom door system with overload protection

Info

Publication number: CN112205187A
Application number: CN202010987673.6A
Authority: CN
Inventors: 王立冬; 侯学伟; 李超; 周爽
Original assignee: Harbin Huahui Agricultural Machinery Manufacturing Co ltd
Current assignee: Harbin Huahui Agricultural Machinery Manufacturing Co ltd
Priority date: 2020-09-18
Filing date: 2020-09-18
Publication date: 2021-01-12
Anticipated expiration: 2040-09-18
Also published as: CN112205187B

Abstract

The invention discloses a bottom door system with overload protection, which comprises a machine bottom, wherein a cavity is arranged in the machine bottom, a plurality of strip-shaped knife edges are arranged on the top surface of the cavity, a cutting mechanism is arranged in the cavity and penetrates through the strip-shaped knife edges, and hydraulic buffer parts are arranged on the top surfaces of the left side and the right side of the cavity. According to the invention, the fourteen-handle chopping knives are matched with the same central shaft, so that the fourteen-handle chopping knives can be ensured to be lifted or fallen simultaneously, the requirement of a user on the length of straws and the matched power of the chopping knives are met, the chopping knives impacted by foreign matters are recovered by matching the arranged bottom knife wheels with the bottom knife tension springs, the hydraulic pressure is amplified by the bottom knife oil cylinder between the bottom door welding part and the connecting rod welding part through the lever principle, the elastic force of the bottom knife tension springs is further overcome, the automatic recovery of the chopping knives impacted by the foreign matters is realized, the protection is effectively provided for the chopping knives, the serious damage to the chopping knives is avoided, and the service life of the chopping knives is prolonged.

Description

Bottom door system with overload protection

Technical Field

The invention relates to the technical field of agricultural machinery, in particular to a bottom door system with overload protection.

Background

The bottom door system is an important component of the baler. It is positioned below the feeding device and is connected with the feeding device and the cabin. Its main effects are two: one is that material choking occurs when too much material is fed into the chamber or when the material is not transported to the chamber in time but accumulates on the feeder. At the moment, the material can be discharged by opening the bottom door, and then the bottom door is closed to normally work; another is that the bottom door system can be equipped with chopper knives, which are needed to chop the material when the material is picked up as whole straw, and then enter the chamber.

Take the us warrior baler (404PRO) as an example. The bottom door system has the following structural modes: two completely penetrating central shafts are arranged on the bottom door welding piece. One central shaft is connected with 8 chopping knives by a lever mechanism, and the other central shaft is also connected with 9 chopping knives by a lever mechanism. The driving force of the two central shafts is realized by two bidirectional hydraulic cylinders. The 8 chopping knives are arranged crosswise to the 9 chopping knives. One hydraulic cylinder controls 8 the raising and lowering of the chopper and the other hydraulic cylinder controls 9 the raising and lowering of the chopper. At the same time, simultaneous raising and lowering of 17 knives can be achieved.

The above technical means have certain disadvantages: 1. according to the requirements of users at present, when the whole straw is picked up, no matter 8 chopping knives or 9 chopping knives are lifted independently, the length of the cut straw is too long, and when 17 chopping knives are lifted, although the length of the cut straw reaches the requirements of the users, the power of a tractor required at the moment needs to be increased, and a standard 120-horsepower tractor is not enough. 2. The bottom door system uses a bidirectional hydraulic cylinder, i.e., it is mandatory whether the cutter is raised or lowered, and damage to the cutter is fatal when foreign objects (such as stones, bricks, etc.) enter the bottom door.

Disclosure of Invention

The invention provides a bottom door system with overload protection, which is used for solving the problems that according to the requirements of current users in the background art, when whole straws are picked up, no matter 8 chopping knives or 9 chopping knives are lifted independently, the length of the cut straws is too long, and when 17 chopping knives are lifted simultaneously, although the length of the cut straws meets the requirements of the users, the power of a tractor required at the moment needs to be increased, and a standard 120-horsepower tractor is not enough. The bottom door system uses a bidirectional hydraulic cylinder, namely, the cutter is forced to be lifted or fallen, and when foreign matters (such as stones, bricks and the like) enter the bottom door, the damage to the cutter is fatal technical problem.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a bottom door system with overload protection, includes the machine bottom, be equipped with the cavity in the machine bottom, be equipped with a plurality of bar edges of a knife on the top surface of cavity, be equipped with cutting mechanism in the cavity, cutting mechanism runs through a plurality of bar edge of a knife settings, the cavity is located and is equipped with hydraulic buffer on the top surface of the left and right sides, hydraulic buffer and cutting mechanism fixed connection, all be equipped with on the both ends lateral wall about the machine bottom and rotate the piece, rotate piece and cutting mechanism fixed connection.

Preferably, cutting mechanism includes that the level rotates the center pin that runs through cavity left and right sides inner wall setting, the center pin with rotate a fixed connection, a plurality of shredding knives and two arms have been cup jointed on the center pin, it is a plurality of shredding knives all are located between two arms, and is a plurality of shredding knives runs through a plurality of bar edge of a knife settings respectively, two the arm of a knife all with hydraulic buffer fixed connection, be provided with the fixation clamp on the lateral wall that shredding knives was kept away from to the arm of a knife.

Preferably, the fixing clip is a two-piece combined structure.

Preferably, the side of the chopping knife is provided with a semicircular hole, the chopping knife is provided with a bottom knife wheel, and a same bottom knife tension spring is fixedly connected between the bottom knife wheel and the inner wall of the cavity.

Preferably, the bottom cutter wheel is rotatable about an axis.

Preferably, the hydraulic buffer part comprises bottom door welding parts respectively arranged on the top surfaces of the left side and the right side of the cavity, a knife slot gap is arranged between the chopping knife and the bottom door welding parts, two bottom knife oil cylinders are fixedly arranged on the bottom door welding parts, and connecting rod welding parts are arranged at the free ends of piston rods of the bottom knife oil cylinders and are respectively fixedly connected with the two knife arms.

Preferably, the bed knife oil cylinder is a one-way control oil cylinder.

Preferably, the rotating part comprises fixing shafts which are fixedly connected to the side walls of the left end and the right end of the machine bottom respectively, the two fixing shafts are arranged close to the side wall of the front end of the machine bottom, the two fixing shafts are sleeved with L-shaped rotating connecting rods in a rotating mode, and the two L-shaped rotating connecting rods are fixedly connected with the central shaft.

Compared with the prior art, the invention has the beneficial effects that:

1. through the fourteen-handle chopping knives matched with the same central shaft, the fourteen-handle chopping knives are ensured to be lifted or dropped simultaneously, so that the requirement of a user on the length of straws and the matched power of the chopping knives are met.

2. Through the cooperation dead knife extension spring of the dead knife wheel that sets up, retrieve the shredding knife after suffering the foreign matter striking to enlarge hydraulic pressure force through the principle of lever by the dead knife hydro-cylinder between dead door seam and the connecting rod seam, and then overcome the elastic force of dead knife extension spring, realize that the shredding knife suffers the automatic recovery after the foreign matter striking, effectively provide the protection to the shredding knife, avoid causing great damage to the shredding knife, the life of extension shredding knife.

Drawings

Fig. 1 is a schematic three-dimensional structure of a bottom door system with overload protection according to the present invention;

fig. 2 is a schematic cross-sectional view of a bottom door system with overload protection according to the present invention.

In the figure: 1 machine bottom, 2 cavities, 3 strip-shaped knife edges, 4 central shafts, 5 shredding knives, 6 knife arms, 7 fixing clamps, 8 bottom knife wheels, 9 bottom knife tension springs, 10 bottom door welding joints, 11 bottom knife oil cylinders, 12 connecting rod welding joints, 13 fixing shafts and 14L-shaped rotating connecting rods.

Detailed Description

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-2, a bottom door system with overload protection comprises a bottom 1, a cavity 2 is arranged in the bottom 1, a plurality of strip-shaped knife edges 3 are arranged on the top surface of the cavity 2, a cutting mechanism is arranged in the cavity 2 and penetrates through the strip-shaped knife edges 3, the cutting mechanism comprises a central shaft 4 which horizontally rotates and penetrates through the inner walls of the left side and the right side of the cavity 2, the central shaft 4 is fixedly connected with a rotating piece, a plurality of chopping knives 5 and two knife arms 6 are sleeved on the central shaft 4, the plurality of chopping knives 5 are all positioned between the two knife arms 6, the plurality of chopping knives 5 respectively penetrate through the strip-shaped knife edges 3, the specific number of the plurality of chopping knives 5 is 14 handles, and the fourteen-handle chopping knives 5 are matched with the same central shaft 4 to ensure that the fourteen-handle chopping knives 5 simultaneously lift or fall, so as to meet the requirements of a user on the length of straws, two arms 6 all with hydraulic buffer fixed connection, be provided with fixation clamp 7 on the lateral wall that arm 6 kept away from shredding knife 5, fixation clamp 7 is two integrated configuration, the semicircle orifice has been seted up to shredding knife 5's side, be equipped with end knife wheel 8 on shredding knife 5, same end knife extension spring 9 of fixedly connected with between end knife wheel 8 and the 2 inner walls of cavity, end knife wheel 8 can rotate round the axle center, end knife extension spring 9 cooperation can be retrieved round axle center pivoted end knife wheel 8 to the shredding knife 5 that suffers after the foreign matter striking.

The top surfaces of the cavity 2 at the left side and the right side are provided with hydraulic buffer parts which are fixedly connected with the cutting mechanism, each hydraulic buffer part comprises a bottom door welding joint 10 respectively arranged on the top surfaces of the cavity 2 at the left side and the right side, a cutter slot gap is arranged between the chopping cutter 5 and the bottom door welding joint 10, bottom cutter oil cylinders 11 are respectively and fixedly arranged on the two bottom door welding joints 10, the free ends of piston rods of the bottom cutter oil cylinders 11 are provided with connecting rod welding joints 12, the two connecting rod welding joints 12 are respectively and fixedly connected with the two cutter arms 6, the hydraulic pressure is amplified by the bottom cutter oil cylinders 11 between the bottom door welding joints 10 and the connecting rod welding joints 12 through the lever principle, and then overcome the elastic force of bed knife extension spring 9, realize the automatic recovery after shredding knife 5 suffers the foreign matter striking, effectively provide the protection to shredding knife 5, avoid causing great damage to shredding knife 5, prolong the life of shredding knife 5, bed knife hydro-cylinder 11 is the one-way control hydro-cylinder.

All be equipped with on the both ends lateral wall about the machine bottom 1 and rotate the piece, rotate piece and cutting mechanism fixed connection, it includes fixed axle 13 on the both ends lateral wall about the machine bottom 1 to rotate the piece, two fixed axles 13 all are close to the front end lateral wall setting of machine bottom 1, it has cup jointed L type rotation connecting rod 14 all to rotate on two fixed axles 13, fixed axle 13 is used for rotating L type and carries on spacingly connecting rod 14, two L types rotate connecting rod 14 all with center pin 4 fixed connection, L type rotates the rotation of connecting rod 14 center pin 4 of being convenient for.

In the invention, when the chopping knife 5 is in an operating state, the chopping knife 5 is matched with the bottom knife wheel 8 which can rotate around the axis to lift along a plurality of strip-shaped knife edges 3 under the elastic action of the bottom knife tension spring 9, the chopping knife 5 at the moment can be reliably fixed on the current position on the ground, when the chopping knife 5 is impacted by hard foreign matters and the impact force reaches a certain value, the stressed chopping knife 5 overcomes the tension action of the bottom knife tension spring 9 and moves downwards along with the central shaft 4, and the fourteen-handle chopping knife 5 is matched with the same central shaft 4 to ensure that the fourteen-handle chopping knife 5 can lift or fall simultaneously so as to meet the requirement of a user on the length of straws and the matched power of the chopping knife 5; when shredding cutter 5 was in the nonoperating state, bed knife hydro-cylinder 11 was in the depths state, through bed knife wheel 8 cooperation bed knife extension spring 9 that sets up, to the shredding cutter 5 that suffers the foreign matter striking fall back under the effect of self gravity to by bed knife hydro-cylinder 11 between bottom door seam 10 and the connecting rod seam 12 enlargies hydraulic pressure force through the principle of lever, and then overcome the elastic force of bed knife extension spring 9, realize that shredding cutter 5 suffers the automatic recovery after the foreign matter striking, effectively provide the protection to shredding cutter 5, avoid causing great damage to shredding cutter 5, prolong shredding cutter 5's life.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The utility model provides a bottom door system with overload protection, includes machine bottom (1), its characterized in that, be equipped with cavity (2) in machine bottom (1), be equipped with a plurality of bar edges of a knife (3) on the top surface of cavity (2), be equipped with cutting mechanism in cavity (2), cutting mechanism runs through a plurality of bar edges of a knife (3) and sets up, cavity (2) are located and are equipped with hydraulic buffer on the top surface of controlling both sides, hydraulic buffer and cutting mechanism fixed connection, all be equipped with the rotation piece on the both ends lateral wall about machine bottom (1), rotate piece and cutting mechanism fixed connection.

2. The bottom door system with the overload protection function as claimed in claim 1, wherein the cutting mechanism comprises a central shaft (4) which horizontally rotates and penetrates through inner walls of the left side and the right side of the cavity (2), the central shaft (4) is fixedly connected with a rotating piece, a plurality of chopping knives (5) and two knife arms (6) are sleeved on the central shaft (4), the chopping knives (5) are located between the two knife arms (6), the chopping knives (5) respectively penetrate through a plurality of strip-shaped knife edges (3), the two knife arms (6) are fixedly connected with a hydraulic buffer piece, and fixing clips (7) are arranged on side walls, far away from the chopping knives (5), of the knife arms (6).

3. Bottom door system with overload protection according to claim 2, characterised in that the retaining clip (7) is a two-piece composite structure.

4. The bottom door system with the overload protection function as claimed in claim 2, wherein a semicircular hole is formed in the side face of the chopping knife (5), a bottom knife wheel (8) is arranged on the chopping knife (5), and a bottom knife tension spring (9) is fixedly connected between the bottom knife wheel (8) and the inner wall of the cavity (2).

5. Bottom door system with overload protection according to claim 3, characterised in that the bottom cutter wheel (8) is rotatable around an axle centre.

6. The bottom door system with the overload protection function as claimed in claim 2, wherein the hydraulic buffer comprises bottom door welding joints (10) respectively arranged on the top surfaces of the left side and the right side of the cavity (2), a cutter slot gap is arranged between the chopping cutter (5) and the bottom door welding joints (10), bottom cutter oil cylinders (11) are fixedly arranged on the two bottom door welding joints (10), connecting rod welding joints (12) are arranged at the free ends of piston rods of the bottom cutter oil cylinders (11), and the two connecting rod welding joints (12) are respectively and fixedly connected with the two cutter arms (6).

7. Bottom door system with overload protection according to claim 6, characterised in that the bed knife cylinder (11) is a one-way control cylinder.

8. The bottom door system with the overload protection function as claimed in claim 2, wherein the rotating member comprises fixing shafts (13) fixedly connected to the side walls of the left and right ends of the machine bottom (1), respectively, the two fixing shafts (13) are both arranged close to the side wall of the front end of the machine bottom (1), the two fixing shafts (13) are both rotatably sleeved with L-shaped rotating connecting rods (14), and the two L-shaped rotating connecting rods (14) are both fixedly connected with the central shaft (4).