Double-crank gearbox for round baler

Abstract

An input shaft, a first bevel gear, an output shaft and a second bevel gear are arranged in a box body, the two ends of the input shaft and the two ends of the output shaft are installed in the box body through bearings, the input shaft and the output shaft are perpendicular to each other, one end of the input shaft is exposed out of the box body and used for being connected with power equipment, and the other end of the input shaft is connected with the second bevel gear. The two ends of the output shaft are exposed out of the box body and used for outputting power, the second bevel gear is fixed to the part, located in the box body, of the output shaft, and the second bevel gear is meshed with the first bevel gear. The gearbox has the advantages that the gearbox is provided with two output ends at the same time, compared with a conventional single-crank bundling machine gearbox, two cranks can be installed, the straw bundling density can be greatly increased, straw bundling is firmer, bundling with a larger size can be achieved, the working efficiency of the bundling machine is improved, and the transportation and storage cost is reduced; the straw bundling machine is compact in structure, small in size and suitable for bundling operation of rice, wheat, corn straw and pasture in the field.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural machinery, and in particular to a double-crank gearbox for a round baler. Background Art

[0002] As a large agricultural country, China has a large amount of crops to be harvested every year. For crop harvesting, it is inevitable to bale the crops or crop straws. As a mechanical device for packing and binding materials such as crop straws, forages, and waste cartons, a baler can change the previous ways of harvesting, transporting, and storing.

[0003] The gearbox of a baler is an important part of the baler and plays a very important role in the operation and running of the baler. The tighter the bale is, the lower the corresponding transportation and storage costs will be. However, the gearbox of a traditional round baler (balers include round balers, square balers, etc.) has only one output end, and the bales produced are not tight enough. There are also gearboxes with single input and multiple outputs existing currently, but round balers are suitable for small-scale agriculture and have user requirements of being easy to operate, having a small size, and a simple structure. For the current single-input and multiple-output gearboxes, they have defects such as large structural size, complex structure, and cumbersome operation for round balers.

[0004] In addition, the traditional round baler gearbox also has the following defects:

[0005] 1. For the gearbox of a round baler, its box body is circular, and six threaded holes are provided on the side wall of the box body. The gearbox is fixed on the frame through these six threaded holes. Since the plane of the fixing surface of the circular box body is relatively small, the installation and fixing are not convenient and the reliability is relatively low;

[0006] 2. In addition to the transmission connection, the gearbox and the power equipment (i.e., the tractor) are also fixed through a pull rod. A pull rod connection hole needs to be provided on the box body of the gearbox. Due to the vibration during the operation of the equipment, there will be relative movement between the pull rod and the box body of the gearbox. Over time, the pull rod connection hole will be worn, resulting in a significant reduction in the service life of the box body and increasing the maintenance cost for users.

[0007] Based on this, this case is proposed. Summary of the Invention

[0008] The purpose of the present invention is to provide a double-crank gearbox for a round baler, which has a compact structure layout, beautiful appearance, good reliability, small volume, and high transmission efficiency.

[0009] In order to achieve the above purpose, the technical solution of the present invention is as follows:

[0010] A double-crank gearbox for a round baler, comprising a box body, wherein an input shaft, a first bevel gear, an output shaft and a second bevel gear are arranged in the box body; both ends of the input shaft and the output shaft are installed in the box body through bearings, and the input shaft and the output shaft are arranged perpendicular to each other; one end of the input shaft exposes out of the box body for connecting a power device, and the other end thereof fixes the first bevel gear; both ends of the output shaft expose out of the box body for outputting power, and the part of the output shaft located in the box body fixes the second bevel gear; the second bevel gear meshes with the first bevel gear.

[0011] Further, a structure in which the first bevel gear and the input shaft are integrally formed by teeth and shaft.

[0012] Further, the second bevel gear and the output shaft are fixedly connected by bolts.

[0013] Further, the box body comprises a main box and a box cover, the main box and the box cover are fixed by bolts and positioning pins; both ends of the input shaft are installed in the main box through bearings, and a first bearing retaining cover is arranged to seal the outer side of the bearing; both ends of the output shaft are installed in the main box and the box cover respectively through bearings, and a second bearing retaining cover is arranged to seal the outer side of the bearing.

[0014] Further, a first sealing ring is arranged between the outer end of the input shaft and the box body, and a retaining edge for protecting the first sealing ring is arranged on the first bearing retaining cover.

[0015] Further, a second sealing ring is arranged between the output shaft and the box body, and a retaining edge for protecting the first sealing ring is arranged on the second bearing retaining cover.

[0016] Further, lifting screws are arranged on the box body.

[0017] Further, a screw-in circular oil level gauge is arranged on the box body.

[0018] Further, a perforated flat plate is installed at the bottom of the box body.

[0019] Further, a pull rod hole is arranged on the box body, and a pull rod sleeve is installed in the pull rod hole by an interference fit method.

[0020] The advantages of the present invention are as follows:

[0021] 1. On the basis of the current gearbox, a structure with two output ends is formed. Compared with the gearbox of a conventional single-crank baler, two cranks can be installed, which can greatly increase the bale density, make the bales stronger and be able to bale larger sizes, improve the working efficiency of the baler, and reduce the transportation and storage costs; moreover, the gearbox has a compact structure and small size, reduces the occupied space, and is applicable to baling machinery for field rice, wheat, corn straw and forage baling operations.

[0022] 2. It is designed with a large perforated plane, through which the gearbox can be more efficiently and reliably installed on the vehicle frame;

[0023] 3. The box body is connected to the tractor pull rod through a pull rod sleeve, and the pull rod sleeve can be replaced when worn, extending the service life of the gearbox box body;

[0024] 4. A rib is added to protect the sealing ring, reducing the maintenance cost. Description of the Drawings

[0025] Figure 1 It is a three-dimensional structure schematic diagram of the double crank gearbox in the embodiment;

[0026] Figure 2 It is Figure 1 a side view schematic diagram of;

[0027] Figure 3 It is Figure 1 a three-dimensional structure schematic diagram from another perspective;

[0028] Figure 4 It is Figure 2 the A-A sectional view schematic diagram in;

[0029] Label Description

[0030] 1. Main box; 2. Box cover; 3. Input shaft; 4. First bevel gear; 5. Output shaft; 6. Second bevel gear; 7. First bearing retainer; 8. Second bearing retainer; 9. First sealing ring; 10. Second sealing ring; 11. Bearing; 12. Lifting screw; 13. Screw-in circular oil level gauge; 14. Perforated flat plate; 15. Pull rod hole; 16. Pull rod sleeve. Detailed Embodiment

[0031] The following further describes the present invention in detail with reference to the embodiments. It should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. in the text are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 a limitation to the present invention.

[0032] This embodiment provides a double crank gearbox for a round baler. As Figures 1 to 4 shown, it includes a box body, which is similar to the gearbox box body of the existing round baler, with a circular main body structure, and appropriate extensions at the input end and the output end. The box body adopts a left-right split box structure, including a main box 1 and a box cover 2. The main box 1 and the box cover 2 are detachably connected and fixed through bolts and positioning pins, facilitating subsequent maintenance operations.

[0033] Inside the box body, there are an input shaft 3, a first bevel gear 4, an output shaft 5 and a second bevel gear 6. Both ends of the input shaft 3 are installed in the main box 1 through tapered roller bearings 11, and a first bearing retaining cover 7 is provided to seal the outside of the bearing. Both ends of the output shaft 5 are installed on the main box 1 and the box cover 2 respectively through tapered roller bearings 11, and a second bearing retaining cover 8 is provided to seal the outside of the bearing. The input shaft 3 and the output shaft 5 are arranged perpendicular to each other. One end of the input shaft 3 protrudes from the box body and is provided with a spline structure for connecting a power device to realize the input of power. The other end of the input shaft 3 fixes the first bevel gear 4. Both ends of the output shaft 5 protrude from the box body and are provided with spline structures for connecting with a crank to realize the output of power. The part of the output shaft 5 located inside the box body fixes the second bevel gear 6, and the second bevel gear 6 meshes with the first bevel gear 4 to realize the transmission of power.

[0034] To optimize the structure, the first bevel gear 4 and the input shaft 3 are integrally formed as a tooth shaft structure, which can improve the load-bearing capacity of the tooth shaft and make the power transmission stable and reliable. At the same time, the second bevel gear 6 and the output shaft 5 are fixed by bolt connection. The part of the output shaft 5 connected to the crank is prone to damage. At the same time, the sizes of the second bevel gear 6 and the output shaft 5 are much larger than those of the first bevel gear 4 and the input shaft 3. By using bolt connection here, the disassembly and replacement of parts can be facilitated.

[0035] A first sealing ring 9 is provided between the outer end of the input shaft 3 and the box body, and second sealing rings 10 are provided between both outer ends of the output shaft 5 and the box body. To extend the service life of the sealing rings and reduce the damage caused by the external environment, a retaining edge for protecting the first sealing ring 9 is provided on the first bearing retaining cover 7, and a retaining edge for protecting the first sealing ring 9 is provided on the second bearing retaining cover 8.

[0036] As Figure 1 shown, the box body of this embodiment is provided with lifting screws 12 to facilitate the lifting of the gearbox. And a screw-in circular oil level gauge 13 is also provided on the box body so that the operator can directly check the liquid level and color state of the lubricating oil or other working fluids.

[0037] To further optimize the structure, a perforated flat plate 14 is fixed to the bottom of the box body of this embodiment by welding, and the gearbox can be fixed to the vehicle frame conveniently, safely and reliably.

[0038] The box body of this embodiment is also provided with a pull rod hole 15. A pull rod sleeve 16 is installed in the pull rod hole 15 by interference fit. The box body is connected to the tractor pull rod through the pull rod sleeve 16. The pull rod sleeve 16 can be replaced after wear, which prolongs the service life of the gearbox box body.

[0039] During use, connect the gearbox to the tractor, install the crank, start the tractor, and the power is transmitted through the input shaft 3, bevel gear 1 4, bevel gear 2 6, and output shaft 5 to achieve simultaneous movement of the two ends of the crank, which can greatly increase the bale density, make the bales stronger, and be able to bale larger sizes, improve the working efficiency of the baler, reduce transportation and storage costs, and fully meet the working requirements of the baler.

[0040] The above embodiments are only used to explain the concept of the present invention, rather than limiting the protection scope of the present invention. Any non-substantive modification of the present invention using this concept shall fall within the protection scope of the present invention.

Claims

1. A double crank gearbox for a round baler, comprising a housing, characterized in that: An input shaft, bevel gear one, an output shaft and bevel gear two are provided in the housing. Both ends of the input shaft and the output shaft are installed in the housing through bearings, and the input shaft and the output shaft are arranged perpendicular to each other. One end of the input shaft is exposed from the housing for connecting to the power equipment, and the other end is fixed to bevel gear one. Both ends of the output shaft are exposed from the housing for outputting power. The part of the output shaft located in the housing is fixed to bevel gear two, and bevel gear two is meshed with bevel gear one.

2. A double crank gearbox for a round baler as claimed in claim 1, characterized in that: A gear-shaft integrally formed structure is formed between the bevel gear 1 and the input shaft.

3. A double crank gearbox for a round baler as claimed in claim 1, characterized in that: The bevel gear 2 is fixed to the output shaft via bolts.

4. A double crank gearbox for a round baler as claimed in claim 1, characterized in that: The box body includes a main box and a box cover, which are fixed by bolts and locating pins. The two ends of the input shaft are installed in the main box through bearings, and a bearing cover is provided to seal the outer side of the bearing. The two ends of the output shaft are respectively installed on the main box and the box cover through bearings, and a bearing cover is provided to seal the outer side of the bearing.

5. A double crank gearbox for a round baler as claimed in claim 4, characterized in that: A sealing ring 1 is arranged between the outer end of the input shaft and the housing, and a retaining edge for protecting the sealing ring 1 is arranged on the bearing retaining cover 1.

6. A double crank gearbox for a round baler as claimed in claim 4, characterized in that: A second sealing ring is arranged between the two ends of the output shaft on the outside and the box body, and a retaining edge for protecting the first sealing ring is arranged on the second bearing retaining cover.

7. A double crank gearbox for a round baler as claimed in claim 1, characterized in that: The box body is provided with hanging screws.

8. A double crank gearbox for a round baler as claimed in claim 1, characterized in that: A screw-in circular oil mark is arranged on the box body.

9. A double crank gearbox for a round baler as claimed in claim 1, characterized in that: A flat plate with holes is installed at the bottom of the box.

10. A double crank gearbox for a round baler as claimed in claim 1, characterized in that: The box body is provided with a pull rod hole, and a pull rod sleeve is installed in the pull rod hole by means of interference fit.

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