Transmission system, silage header and silage harvester

Abstract

The utility model discloses a transmission system, silage header and silage harvester, including main input case, main gearbox, cone pulley transmission assembly, cone pulley transmission case, stem collection case, main input transmission shaft and stem collection transmission shaft, main input case is connected with main gearbox through main input transmission shaft, the main gearbox is provided with a first output shaft and a second output shaft, the first output shaft is connected with the stem collecting box through the stem collecting transmission shaft, the second output shaft is connected with the cone pulley transmission box through the cone pulley transmission assembly, the main input transmission shaft comprises a sliding shaft, first joint forks, second joint forks, safety pins and a cross shaft, the safety pins are arranged at the two ends of the sliding shaft respectively, and the two second joint forks are connected through the sliding shaft. A positioning hole through which a safety pin penetrates is formed in the second joint fork, and the second joint fork is rotationally connected with the first joint fork through a cross shaft; the structure is compact, the overload protection function can be realized, and the reliability is good; the maintenance operation is convenient, and the shutdown maintenance time can be saved, so that the silage harvesting efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural machinery, in particular, to a transmission system. In addition, the utility model also relates to a forage harvester including the forage harvester including the forage harvester. Background Art

[0002] The harvester is an important component of the silage harvester and is widely used in the prior art. For example, the foldable silage harvester frame, foldable silage harvester and harvester disclosed in Chinese patent CN215602000U are provided with a fixed bracket, a fixed arm, a folding bracket and a swivel arm, and driven by a driving cylinder to realize the folding and unfolding of the folding frame. In actual harvesting operations, when the feed volume is too large or the land is dry and lacks water, resulting in a low moisture content of corn, the harvester is easily blocked, causing the instantaneous torque on the harvester to be too large, which can easily cause damage to parts in the transmission system. When replacing, the assembly and internal structure need to be disassembled to stop the machine, which increases the time cost while also greatly increasing the labor intensity and workload, resulting in low efficiency of silage harvesting. Utility Model Content

[0003] The utility model provides a transmission system, a silage cutting platform and a silage harvester to solve the technical problems that when the existing silage cutting platform is subjected to excessive instantaneous torque, the transmission system is easily damaged and fails, and downtime for maintenance is time-consuming and labor-intensive, resulting in low efficiency of silage harvesting.

[0004] According to one aspect of the utility model, a transmission system is provided, including a main input box, a main gearbox, a tower pulley transmission assembly, a tower pulley transmission box, a stem collecting box, a main input transmission shaft and a stem collecting transmission shaft, the main input box is connected to the main gearbox through the main input transmission shaft, a first output shaft and a second output shaft are arranged on the main gearbox, the first output shaft is connected to the stem collecting box through the stem collecting transmission shaft, the second output shaft is connected to the tower pulley transmission box through the tower pulley transmission assembly, the main input transmission shaft includes a sliding shaft, a first yoke, a second yoke, a safety pin and a cross shaft, safety pins are respectively arranged at both ends of the sliding shaft, two second yokes are connected through the sliding shaft, and a positioning hole for passing the safety pin is opened on the second yoke, and the second yoke is rotationally connected with the first yoke through the cross shaft.

[0005] Furthermore, an input spline shaft and an output spline shaft driven to rotate by the input spline shaft are arranged on the step pulley transmission assembly, the input spline shaft is connected to the second output shaft, and the output spline shaft is connected to the step pulley transmission box.

[0006] Furthermore, a first clutch is disposed on the second output shaft.

[0007] Furthermore, a first tooth nesting is arranged on the first output shaft for connecting the stem collecting transmission shaft, and the stem collecting transmission shaft includes a cross-shaped fork transmission shaft, a second clutch arranged on the first end of the cross-shaped fork transmission shaft for connecting the stem collecting box, a second tooth nesting arranged on the second end of the cross-shaped fork transmission shaft and adapted to the first tooth nesting, and a compression spring for abutting the second tooth nesting so that the second tooth nesting is in close contact with the first tooth nesting.

[0008] Furthermore, the included angle between the driving abutment surface of the first tooth nesting and its radial plane is 75-85°, and the driving abutment surface of the second tooth nesting is arranged in parallel with the driving abutment surface of the first tooth nesting.

[0009] Furthermore, the first clutch and the second clutch both include a housing, a rotating body arranged in the housing, a sliding pin cylinder slidably embedded in the rotating body along the radial direction of the rotating body, a trapezoidal slide groove arranged on the inner wall of the housing and adapted to the sliding pin cylinder, and a spring for abutting the sliding pin cylinder so that the sliding pin cylinder is embedded in the trapezoidal slide groove.

[0010] Further, the step pulley transmission box includes a first step pulley transmission box and a second step pulley transmission box which are simultaneously driven by the step pulley transmission assembly, and the stem collecting box includes a first stem collecting box and a second stem collecting box which are simultaneously driven by the first output shaft.

[0011] According to another aspect of the utility model, a forage harvesting platform is also provided, comprising the above-mentioned transmission system, and also comprising a first sprocket driven by the stem collecting box, a straw wheel arranged on the first sprocket, a sickle group driven by the first sprocket, and a tensioning mechanism for adjusting the tension of the sickle group.

[0012] Furthermore, the tensioning mechanism includes a base, a telescopic cylinder arranged on the base, a mounting seat arranged on the free end of the telescopic cylinder, and a second sprocket arranged on the mounting seat and adapted to the sickle group.

[0013] According to another aspect of the utility model, a forage harvester is also provided, comprising the above-mentioned transmission system or the above-mentioned forage cutting platform.

[0014] The utility model has the following beneficial effects:

[0015] The transmission system of the utility model has a main input box that transmits power to the main gearbox through the main input transmission shaft, and the main gearbox then drives the tower wheel transmission box and the stem collecting box respectively, and the structure is compact; second forks are arranged at both ends of the main input transmission shaft, and the second fork is connected to the first fork through a cross shaft, even if the sliding shaft is deflected due to vibration during operation, the power transmission can be guaranteed to be normal; a safety pin is arranged on the sliding shaft, on the one hand, the safety pin can pass through the positioning hole on the second fork to avoid the second fork from rotating relative to the sliding shaft, thereby ensuring smooth power transmission, and on the other hand, when the torque exceeds the limit torque of the safety pin, the safety pin breaks to protect the components of the entire transmission system, realizing the function of overload protection, and having good reliability; during maintenance, only the safety pin needs to be replaced, and the operation is convenient, which can save the time of downtime for maintenance, thereby improving the efficiency of silage harvesting.

[0016] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0018] Figure 1 It is a structural schematic diagram of the transmission system of the preferred embodiment of the utility model;

[0019] Figure 2 It is a structural schematic diagram of the main gearbox of the preferred embodiment of the utility model;

[0020] Figure 3 It is a structural schematic diagram of the second output shaft of the preferred embodiment of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the first tooth embedding of the preferred embodiment of the utility model;

[0022] Figure 5 It is a structural schematic diagram of a step pulley transmission assembly of a preferred embodiment of the utility model;

[0023] Figure 6 It is a structural schematic diagram of an input spline shaft of a preferred embodiment of the utility model;

[0024] Figure 7 It is a structural schematic diagram of the main input transmission shaft of the preferred embodiment of the utility model;

[0025] Figure 8 It is a structural schematic diagram of a sliding shaft of a preferred embodiment of the utility model;

[0026] Fig. 9 It is a structural schematic diagram of the stem collecting transmission shaft of the preferred embodiment of the utility model;

[0027] Fig.10 It is a structural schematic diagram of a compression spring of a preferred embodiment of the utility model;

[0028] Fig.11 This is a schematic diagram of the structure of the second tooth embedding of the preferred embodiment of the utility model;

[0029] Fig.12 This is a schematic structural diagram of a first clutch of a preferred embodiment of the utility model;

[0030] Fig.13 It is a structural schematic diagram of a silage harvesting platform of a preferred embodiment of the utility model;

[0031] Fig.14 It is a structural schematic diagram of the tensioning mechanism of the preferred embodiment of the utility model.

[0032] Legend:

[0033] 1. Main input box; 2. Main gearbox; 21. First output shaft; 22. Second output shaft; 23. First clutch; 231. Housing; 232. Rotating body; 233. Sliding pin cylinder; 234. Trapezoidal slideway; 235. Spring; 236. Oil nozzle; 24. First tooth nesting; 3. Step pulley transmission assembly; 31. Input spline shaft; 32. Input gear; 33. First gear; 34. Second gear; 35. Third gear; 36. Fourth gear; 37. Output spline shaft; 4. Step pulley transmission box; 4A. First step pulley transmission box; 4B. Second step pulley transmission box Drive box; 5. Stem collecting box; 5A. First stem collecting box; 5B. Second stem collecting box; 6. Main input transmission shaft; 61. Sliding shaft; 611. Round hole; 612. Slotted hole; 62. First yoke; 63. Second yoke; 64. Safety pin; 65. Cross shaft; 7. Stem collecting transmission shaft; 70. Cross yoke transmission shaft; 71. Second clutch; 72. Second tooth embedding; 73. Compression spring; 8. First sprocket; 81. Straightening wheel; 82. Scythe group; 83. Tensioning mechanism; 831. Base; 832. Telescopic cylinder; 833. Mounting seat; 834. Second sprocket. DETAILED DESCRIPTION

[0034] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. However, the present invention can be implemented in a variety of different ways as defined and covered below.

[0035] Please also read Figures 1 to 12The transmission system of this embodiment includes a main input box 1, a main gearbox 2, a tower pulley transmission assembly 3, a tower pulley transmission box 4, a stem collecting box 5, a main input transmission shaft 6 and a stem collecting transmission shaft 7. The main input box 1 is connected to the main gearbox 2 through the main input transmission shaft 6. The main gearbox 2 is provided with a first output shaft 21 and a second output shaft 22. The first output shaft 21 is connected to the stem collecting box 5 through the stem collecting transmission shaft 7. The second output shaft 22 is connected to the tower pulley transmission box 4 through the tower pulley transmission assembly 3. The main input transmission shaft 6 includes a sliding shaft 61, a first yoke 62, a second yoke 63, a safety pin 64 and a cross shaft 65. Safety pins 64 are respectively provided at both ends of the sliding shaft 61. The two second yokes 63 are connected through the sliding shaft 61, and a positioning hole for passing the safety pin 64 is opened on the second yoke 63. The second yoke 63 is rotationally connected with the first yoke 62 through the cross shaft 65.

[0036] In the transmission system of this embodiment, the main input box 1 transmits power to the main gearbox 2 through the main input transmission shaft 6, and the main gearbox 2 then drives the tower wheel transmission box 4 and the stem collecting box 5 respectively, with a compact structure; second yokes 63 are arranged at both ends of the main input transmission shaft 6, and the second yoke 63 is connected to the first yoke 62 through a cross shaft 65. Even if the sliding shaft 61 is deflected due to vibration during operation, the power transmission can be guaranteed to be normal; a safety pin 64 is arranged on the sliding shaft 61. On the one hand, the safety pin 64 can pass through the positioning hole on the second yoke 63 to prevent the second yoke 63 from rotating relative to the sliding shaft 61, thereby ensuring that the power can be transmitted smoothly. On the other hand, when the torque exceeds the limit torque of the safety pin 64, the safety pin 64 breaks to protect the components of the entire transmission system, realizing the overload protection function and having good reliability; during maintenance, only the safety pin 64 needs to be replaced, which is easy to operate and can save the time of downtime for maintenance, thereby improving the efficiency of silage harvesting. Optionally, a circular hole 611 and / or a slot 612 for installing a safety pin 64 is provided on the sliding shaft 61. The circular hole 611 has a simple structure and is easy to process, and can achieve good positioning of the safety pin 64. The slot 612 is arranged along the axial direction of the sliding shaft 61. When the safety pin 64 is installed in the slot 612, the safety pin 64 can slide along the slot 612, so that the second fork 63 can be extended and retracted along the axial direction of the sliding shaft 61, which can further enhance the vibration resistance of the transmission system.

[0037] like Figure 5 and Figure 6As shown, in this embodiment, an input spline shaft 31 and an output spline shaft 37 driven to rotate by the input spline shaft 31 are arranged on the step pulley transmission assembly 3, the input spline shaft 31 is connected to the second output shaft 22, and the output spline shaft 37 is connected to the step pulley transmission box 4; the input end of the step pulley transmission assembly 3 is the input spline shaft 31, the input spline shaft 31 is fixedly connected with an input gear 32 through a spline or a flat key, the input gear 32 is meshed with a first gear 33, the first gear 33 is coaxially arranged with a second gear 34, the second gear 34 is meshed with a third gear 35, the third gear 35 is meshed with a fourth gear 36, and the output spline shaft 37 is fixedly connected with the fourth gear 36, and the distance between the step pulley transmission box 4 and the main input transmission shaft 6 can be increased by multiple gear transmission to avoid interference; it can be understood that the transmission gear between the input spline shaft 31 and the output spline shaft 37 can be adjusted according to actual needs. Optionally, the structure of the output spline shaft 37 and the fourth gear 36 is a gear shaft.

[0038] like Figure 2 and Figure 3 As shown, in this embodiment, a first clutch 23 is arranged on the second output shaft 22 to provide overload protection for the second output shaft 22, thereby avoiding destructive damage to the step pulley transmission box 4, extending the service life of the transmission system, and reducing the impact on the working efficiency of the silage harvesting platform.

[0039] like Figure 4 , Fig. 9 Fig.10 and Fig.11As shown, in this embodiment, a first tooth nesting 24 for connecting to a stem collecting transmission shaft 7 is arranged on the first output shaft 21, and the stem collecting transmission shaft 7 includes a cross-shaped fork transmission shaft 70, a second clutch 71 arranged on the first end of the cross-shaped fork transmission shaft 70 for connecting to a stem collecting box 5, a second tooth nesting 72 arranged on the second end of the cross-shaped fork transmission shaft 70 and adapted to the first tooth nesting 24, and a compression spring 73 for abutting the second tooth nesting 72 so that the second tooth nesting 72 is in close contact with the first tooth nesting 24; the compression spring 73 presses the second tooth nesting 72 tightly, so that the second tooth nesting 72 is closely connected to the first tooth nesting 24, the second tooth nesting 72 is relatively stationary with the first tooth nesting 24, and drives the cross-shaped fork transmission shaft 70 to rotate; when the torque is too large at a certain moment, the first tooth nesting 24 and the first tooth nesting 24 are in close contact with each other. The dynamic friction force of the second tooth nest 72 is greater than the pressure applied by the compression spring 73, the second tooth nest 72 retracts, and the first tooth nest 24 disengages from the second tooth nest 72, thereby achieving the effect of overload protection; when the torque decreases, the compression spring 73 drives the second tooth nest 72 to reset and connect with the first tooth nest 24, so that the second tooth nest 72 is reset and the first tooth nest 24 cooperates with the inclined driving abutment surface to achieve an overload slipping effect. The structure is ingenious and does not require manual intervention; if the first tooth nest 24 and the second tooth nest 72 are adhered, and the torque is too large and they are not disengaged, the second clutch 71 can also achieve the effect of overload protection. The structural design of multiple overload protection can avoid destructive damage to the stem collecting box 5, extend the service life of the transmission system, and reduce the impact on the working efficiency of the silage harvesting platform.

[0040] like Fig.11 As shown, in the present embodiment, the angle α between the driving abutment surface of the first tooth nesting 24 and its radial plane is 75-85°, and the driving abutment surface of the second tooth nesting 72 is arranged parallel to the driving abutment surface of the first tooth nesting 24. When the angle α is less than 75°, the first tooth nesting 24 and the second tooth nesting 72 are difficult to disengage, and the overload protection effect is not good; when the angle α is greater than 85°, the friction between the first tooth nesting 24 and the second tooth nesting 72 is too small, and the first tooth nesting 24 and the second tooth nesting 72 frequently slip, affecting the working efficiency of the cutting table.

[0041] like Fig.12As shown, in this embodiment, the first clutch 23 and the second clutch 71 are both pin-type clutches, which include a housing 231, a rotating body 232 arranged in the housing 231, a pin cylinder 233 slidably embedded in the rotating body 232 along the radial direction of the rotating body 232, a trapezoidal slide groove 234 arranged on the inner wall of the housing 231 and adapted to the pin cylinder 233, and a sliding pin cylinder 234 for abutting against the pin cylinder 233 so that the pin cylinder 233 is embedded in the trapezoidal slide groove 234. 4 spring 235; the sliding pin cylinder 233 is provided with a cone head adapted to the trapezoidal slide groove 234, the height of the cone head is greater than the depth of the trapezoidal slide groove 234, when the torque is greater than the pressure of the spring 235 on the sliding pin cylinder 233, the cone head of the sliding pin cylinder 233 slides out of the trapezoidal slide groove 234 to achieve overload protection; when the torque decreases, the cone head of the sliding pin cylinder 233 slides into the trapezoidal slide groove 234 under the action of the spring 235 and smoothly resets, the structure is reasonable, and no manual intervention is required. Optionally, the number of springs 235 and 235 is determined according to the required torque size. When the torque requirement is large, the spring 235 can be arranged in a coaxial sleeve manner with large and small springs. Optionally, the housing 231 is provided with an oil nozzle 236 for introducing lubricating oil to reduce the friction between the sliding pin cylinder 233 and the rotating body 232, so that the sliding pin cylinder 233 can be smoothly extended and retracted. Optionally, the first clutch 23 and the second clutch 71 may also be friction plate clutches, safety pin clutches or torque limiters.

[0042] like Figure 1 As shown, in this embodiment, the tower pulley transmission box 4 includes a first tower pulley transmission box 4A and a second tower pulley transmission box 4B which are simultaneously driven by the tower pulley transmission assembly 3, and the stem collecting box 5 includes a first stem collecting box 5A and a second stem collecting box 5B which are simultaneously driven by the first output shaft 21. The first tower pulley transmission box 4A and the second tower pulley transmission box 4B are simultaneously driven by both ends of the output spline shaft 37, and first tooth nestings 24 are arranged at both ends of the first output shaft 21. The first stem collecting box 5A and the second stem collecting box 5B which can be simultaneously driven by two first tooth nestings 24 have a compact structure, can reduce the volume and weight of the ensilage harvesting platform, and improve the working efficiency of the ensilage harvesting platform.

[0043] like Fig.13 and Fig.14 As shown, a forage harvesting platform includes the above-mentioned transmission system, and also includes a first sprocket 8 driven by a stem collecting box 5, a straw wheel 81 arranged on the first sprocket 8, a sickle group 82 driven by the first sprocket 8, and a tensioning mechanism 83 for adjusting the tension of the sickle group 82; the straw wheel 81 can hold the straw during the feeding process to make the material feeding smoother; during the operation, the stem collecting box 5 provides power to drive the first sprocket 8 to operate, and the rotation of the first sprocket 8 drives the sickle group 82 to operate. The sickle group 82 has three groups of cutters above and below. The bottom layer of cutters can cut the straw, and the cut straw is clamped by the upper two layers of cutters and sent to the lower processing mechanism.

[0044] like Fig.14 As shown, in this embodiment, the tensioning mechanism 83 includes a base 831, a telescopic cylinder 832 arranged on the base 831, a mounting seat 833 arranged on the free end of the telescopic cylinder 832, and a second sprocket 834 arranged on the mounting seat 833 and adapted to the sickle group 82. On the one hand, the telescopic cylinder 832 can drive the second sprocket 834 to move, so that the tension of the sickle group 82 is maintained within a suitable range, which can improve the working efficiency of the silage harvesting platform; on the other hand, during maintenance, the telescopic cylinder 832 drives the second sprocket 834 to retract, so that the sickle group 82 can be removed as a whole, which can improve the efficiency of maintenance.

[0045] A forage harvester comprises the above-mentioned transmission system or the above-mentioned forage harvesting platform.

[0046] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A transmission system, characterized in that: It comprises a main input box (1), a main gearbox (2), a tower wheel transmission assembly (3), a tower wheel transmission box (4), a stem collecting box (5), a main input transmission shaft (6) and a stem collecting transmission shaft (7). The main input box (1) is connected to the main gearbox (2) via the main input transmission shaft (6); a first output shaft (21) and a second output shaft (22) are arranged on the main gearbox (2); the first output shaft (21) is connected to the stem collecting box (5) via a stem collecting transmission shaft (7); the second output shaft (22) is connected to the step pulley transmission box (4) via the step pulley transmission assembly (3); The main input transmission shaft (6) comprises a sliding shaft (61), a first yoke (62), a second yoke (63), a safety pin (64) and a cross shaft (65); the two ends of the sliding shaft (61) are respectively provided with safety pins (64); the two second yokes (63) are connected via the sliding shaft (61); a positioning hole for passing the safety pin (64) is provided on the second yoke (63); the second yoke (63) is rotatably connected with the first yoke (62) via the cross shaft (65).

2. The transmission system according to claim 1, characterized in that: An input spline shaft (31) and an output spline shaft (37) driven to rotate by the input spline shaft (31) are arranged on the step pulley transmission assembly (3); the input spline shaft (31) is connected to the second output shaft (22), and the output spline shaft (37) is connected to the step pulley transmission box (4).

3. The transmission system according to claim 1 or 2, characterized in that: A first clutch (23) is disposed on the second output shaft (22).

4. The transmission system according to claim 3, characterized in that: The first output shaft (21) is provided with a first tooth nest (24) for connecting to the stem collecting transmission shaft (7), and the stem collecting transmission shaft (7) comprises a cross-shaped fork transmission shaft (70), a second clutch (71) arranged on the first end of the cross-shaped fork transmission shaft (70) for connecting to the stem collecting box (5), a second tooth nest (72) arranged on the second end of the cross-shaped fork transmission shaft (70) and adapted to the first tooth nest (24), and a compression spring (73) for abutting the second tooth nest (72) so that the second tooth nest (72) is in close contact with the first tooth nest (24).

5. The transmission system according to claim 4, characterized in that: The included angle between the driving abutment surface of the first tooth nest (24) and its radial plane is 75-85 degrees, and the driving abutment surface of the second tooth nest (72) is arranged in parallel with the driving abutment surface of the first tooth nest (24).

6. The transmission system according to claim 4, characterized in that: The first clutch (23) and the second clutch (71) both comprise a housing (231), a rotating body (232) arranged in the housing (231), a sliding pin cylinder (233) slidably embedded in the rotating body (232) along the radial direction of the rotating body (232), a trapezoidal slide groove (234) arranged on the inner wall of the housing (231) and adapted to the sliding pin cylinder (233), and a spring (235) for abutting against the sliding pin cylinder (233) so that the sliding pin cylinder (233) is embedded in the trapezoidal slide groove (234).

7. The transmission system according to claim 1, characterized in that: The tower pulley transmission box (4) comprises a first tower pulley transmission box (4A) and a second tower pulley transmission box (4B) which are simultaneously driven by the tower pulley transmission assembly (3); the stem collecting box (5) comprises a first stem collecting box (5A) and a second stem collecting box (5B) which are simultaneously driven by the first output shaft (21).

8. A silage harvesting platform, characterized in that: A transmission system comprising any one of claims 1 to 7, It also includes a first sprocket (8) driven by the stem collecting box (5), a straw wheel (81) arranged on the first sprocket (8), a sickle group (82) driven by the first sprocket (8), and a tensioning mechanism (83) for adjusting the tension of the sickle group (82).

9. The forage harvesting platform according to claim 8, characterized in that: The tensioning mechanism (83) comprises a base (831), a telescopic cylinder (832) arranged on the base (831), a mounting seat (833) arranged on the free end of the telescopic cylinder (832), and a second sprocket (834) arranged on the mounting seat (833) and adapted to the sickle assembly (82).

10. A forage harvester, characterized in that: The invention comprises the transmission system according to any one of claims 1 to 7 or the forage harvesting platform according to any one of claims 8 to 9.

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