Cylindrical gear speed-increasing dead knife transmission case

Abstract

The utility model relates to a cylindrical gear speed-increasing dead knife transmission case, and belongs to the field of corn harvesters. Comprising a gear selection mechanism, a box body, a power input mechanism, a first power transmission mechanism, a second power transmission mechanism, a power output mechanism and a spline housing, the gear selection mechanism is connected with the spline housing, the power input mechanism, the first power transmission mechanism, the second power transmission mechanism and the power output mechanism are all arranged in the box body, the power input mechanism is connected with the first power transmission mechanism, and the power output mechanism is connected with the second power transmission mechanism. The first power transmission mechanism is connected with the second power transmission mechanism, the second power transmission mechanism is connected with the power output mechanism, and the spline housing is slidably connected with the second power transmission mechanism. According to the speed-increasing dead knife transmission case, the applicability of products is improved, the individual requirements of users are met, the size of the speed-increasing dead knife transmission case is reduced, a transmission mechanism is simplified, and the production cost and the maintenance cost are reduced.

Description

Technical Field

[0001] The utility model relates to the field of corn harvesters, in particular to a cylindrical gear speed-increasing bed knife transmission box. Background Art

[0002] The speed increasing bed knife transmission box is one of the important working parts of the corn harvester. Its main function is to provide power for the corn harvester to return the corn stalks to the field after harvesting the corn, so as to realize the operation of returning the corn stalks to the field after shredding. However, on the one hand, the mainstream speed increasing bed knife transmission boxes on the market currently have the disadvantages of single structure, bulky appearance, large overall weight, low strength, high failure rate, and small speed increasing range; on the other hand, although the corn harvester is equipped with a speed increasing bed knife transmission box, in some cases the user does not want to return the corn stalks to the field after shredding, or even does not want to return the corn stalks to the field, but this function cannot be cancelled, which is not conducive to the personalized needs of users. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a cylindrical gear speed-increasing bed knife transmission box to solve the above-mentioned problem.

[0004] The technical solution of the utility model for solving the above technical problems is as follows: a cylindrical gear speed-increasing bottom knife transmission box, comprising: a gear selection mechanism, a box body, a power input mechanism, a first power transmission mechanism, a second power transmission mechanism, a power output mechanism and a spline sleeve; the gear selection mechanism is connected to the spline sleeve, the power input mechanism, the first power transmission mechanism, the second power transmission mechanism and the power output mechanism are all arranged in the box body, the power input mechanism is connected to the first power transmission mechanism, the first power transmission mechanism is connected to the second power transmission mechanism, the second power transmission mechanism is connected to the power output mechanism, and the spline sleeve is slidably connected to the second power transmission mechanism.

[0005] The beneficial effects of the utility model are as follows: the gear selection mechanism cooperates with the spline sleeve to increase the non-returning-to-field operation gear, and to select whether to return corn stalks to the field according to the actual needs of the user, thereby improving the applicability of the product and meeting the personalized needs of the user; the power input mechanism, the first power transmission mechanism, the second power transmission mechanism and the power output mechanism are all arranged in the box body, and are connected in sequence, which is conducive to reducing the volume of the speed-increasing bottom knife transmission box, simplifying the transmission mechanism, reducing production costs and maintenance costs, and improving the competitiveness of the product.

[0006] On the basis of the above technical solution, the present invention can also be improved as follows.

[0007] Further, the box body includes a front box body, an intermediate box body, and a rear box body. The front box body and the rear box body are respectively arranged on both sides of the intermediate box body through positioning pins. Bolts pass through the front box body and the intermediate box body and are connected to the rear box body.

[0008] The beneficial effect of adopting the above further solution is that it is beneficial to improve the consistency of the coaxiality of the bearing holes of the front box body, the intermediate box body, and the rear box body, and improve the connection accuracy and strength between the three box bodies.

[0009] Further, an oil filling hole and an observation hole are provided at the top end of the rear box body, and an oil drain hole is provided at the bottom end. The oil filling hole, the observation hole, and the oil drain hole are all through holes that can be detachably blocked by a plug.

[0010] The beneficial effect of adopting the above further solution is that the oil filling hole and the oil drain hole are beneficial to improving the convenience of maintenance and oil filling when the cylindrical gear speed-increasing end mill transmission box is applied to different installation positions and different installation directions. The observation hole is beneficial to observing the meshing condition of the gears in the box body during assembly and maintenance.

[0011] Further, the gear selection mechanism includes a rocker arm, a hinge shaft, a locking bolt, two locking holes, a fork shaft, a fork, and two blocks. One end of the rocker arm is hinged to the side wall of the rear box body through the hinge shaft. The locking holes are arranged on the side wall of the rear box body. The locking bolt passes through the other end of the rocker arm and is connected to the locking holes. The fork shaft is vertically connected to one end of the rocker arm. The fork is sleeved on the fork shaft. The two blocks are respectively arranged on both sides of the bottom end of the fork and are respectively connected to both sides of the spline sleeve. The fork shaft, the fork, and the blocks are all arranged in the box body.

[0012] The beneficial effect of adopting the above further solution is that the rocker arm swings around the hinge shaft, which is beneficial to driving the fork shaft and the fork to rotate synchronously. When the fork rotates, it will drive the block to swing, and then drive the spline sleeve to swing within a certain range, finally realizing the sliding connection between the spline sleeve and the second power transmission mechanism. The locking bolt fixes the rocker arm at the position of the two locking holes, which is beneficial to providing a limit for the swing of the rocker arm and finally the swing of the spline sleeve, and at the same time prevents the rocker arm from shifting gears during power transmission and prevents the spline and gears from being damaged during operation.

[0013] Further, the second power transmission mechanism includes: a second intermediate shaft, an intermediate shaft driven gear, a third intermediate bearing, a fourth intermediate bearing, a fifth intermediate bearing, a driving bevel gear and an intermediate shaft spline gear; the intermediate shaft driven gear and the driving bevel gear are respectively sleeved on both ends of the second intermediate shaft, the third intermediate bearing and the fourth intermediate bearing are both sleeved on the second intermediate shaft, the outer wall of the third intermediate bearing abuts against the inner wall of the rear housing, the outer wall of the fourth intermediate bearing abuts against the inner wall of the driving bevel gear, the fifth intermediate bearing is sleeved on the driving bevel gear, and the outer wall abuts against the inner wall of the rear housing, the intermediate shaft spline gear sleeve is sleeved on the second intermediate shaft and is arranged between the third intermediate bearing and the driving bevel gear, the inner spline of the spline sleeve is meshed with the intermediate shaft spline teeth, the outer spline of the spline sleeve slides along the second intermediate shaft under the toggle of the rocker arm, and meshes with the driving bevel gear when the other end of the rocker arm is toggle to one of the locking holes.

[0014] The beneficial effect of adopting the above-mentioned further scheme is that the swinging of the spline sleeve within a certain range is conducive to the sliding of the spline sleeve as a whole along the second intermediate shaft, thereby realizing the engagement and disengagement of the spline sleeve and the active bevel gear. When the spline sleeve is engaged with the active bevel gear, it is conducive to transmitting power to the power output mechanism, realizing the shredding of corn stalks and returning them to the field. When the spline sleeve is disengaged from the active bevel gear, it is conducive to avoiding the transmission of power to the power output mechanism, not shredding the corn stalks and returning them to the field, and realizing the recycling of corn stalks. The third intermediate bearing, the fourth intermediate bearing and the fifth intermediate bearing are conducive to making the power transmission more stable and reducing the noise of gear meshing during the transmission process.

[0015] Further, the power output mechanism includes: an output shaft, a first output bearing, a second output bearing, a second spacer sleeve and an output shaft oil seal; the output shaft is arranged at one end inside the housing and meshes with the active bevel gear, and is arranged at one end outside the housing and connected to the tool, the first output bearing, the second output bearing, the second spacer sleeve and the output shaft oil seal are all arranged in the housing and are all sleeved on the output shaft, the second spacer sleeve is arranged between the first output bearing and the second output bearing, the outer rings of the first output bearing and the second output bearing are in contact with the inner wall of the rear housing, and the output shaft oil seal is in contact with the inner wall of the rear housing where the output shaft penetrates.

[0016] The beneficial effects of adopting the above further scheme are: the output shaft is engaged with the active bevel gear, which is conducive to transmitting power to the external tool, and then chopping the corn stalks and returning them to the field; the first output bearing and the second output bearing are conducive to making the power transmission more stable; the second spacer sleeve is conducive to avoiding collision and interference between bearings; and the output shaft oil seal is conducive to avoiding leakage of lubricating oil in the box.

[0017] Furthermore, the first power transmission mechanism includes: a first intermediate shaft, a first intermediate bearing, a second intermediate bearing, an intermediate shaft driving gear, and a first spacer sleeve; the first intermediate bearing, the second intermediate bearing, the intermediate shaft driving gear, and the first spacer sleeve are all sleeved on the first intermediate shaft, the intermediate shaft driving gear meshes with the intermediate shaft driven gear, the first spacer sleeve is arranged between the intermediate shaft driving gear and the second intermediate bearing, the outer rings of the first intermediate bearing and the second intermediate bearing are respectively abutted against the inner wall of the front box body and the inner wall of the intermediate box body, and the first intermediate shaft is connected to the power input mechanism.

[0018] The beneficial effects of adopting the above further scheme are as follows: the intermediate shaft driving gear meshing with the intermediate shaft driven gear is beneficial to transmit power from the first power transmission mechanism to the second power transmission mechanism; the first intermediate bearing and the second intermediate bearing are beneficial to make the power transmission smoother; the first spacer sleeve is beneficial to avoid collision interference between the bearing and the gear.

[0019] Furthermore, an intermediate shaft gear is wound around the circumferential direction of the first intermediate shaft, and the intermediate shaft gear is arranged between the first intermediate bearing and the second intermediate bearing.

[0020] The beneficial effects of adopting the above further scheme are as follows: the intermediate shaft gear is beneficial to transmit the power of the power input mechanism to the first power transmission mechanism, and then drive the first intermediate shaft and the intermediate shaft driving gear to rotate.

[0021] Furthermore, the power input mechanism includes: an input shaft, a first input bearing, a second input bearing, an input shaft oil seal, and an input shaft driving gear; the first input bearing, the second input bearing, the input shaft oil seal, and the input shaft driving gear are all arranged in the box body and are all sleeved on the input shaft, the input shaft driving gear is arranged between the first input bearing and the second input bearing, the outer rings of the first input bearing and the second input bearing are respectively abutted against the inner wall of the front box body and the inner wall of the intermediate box body, the input shaft oil seal is abutted against the inner wall of the front box body where the input shaft penetrates through, and the input shaft driving gear meshes with the intermediate shaft gear.

[0022] The beneficial effects of adopting the above further scheme are as follows: the input shaft is beneficial to drive the input shaft driving gear to rotate, and then transmit the power to the first power transmission mechanism; the first input bearing and the second input bearing are beneficial to make the power transmission smoother; the input shaft oil seal is beneficial to avoid the leakage of the lubricating oil in the box body.

[0023] Furthermore, one end of the input shaft arranged outside the box body is connected to the transmission box universal shaft of the corn harvester through a spline.

[0024] The beneficial effects of adopting the above further solution are as follows: It is beneficial to transfer the power in the transmission box of the corn harvester to the power input mechanism through the universal shaft and the input shaft. Brief Description of the Drawings

[0025] Figure 1 Schematic diagram of the overall structure provided by the embodiment of the present invention Figure 1 ;

[0026] Figure 2 Schematic diagram of the overall structure provided by the embodiment of the present invention Figure 2 ;

[0027] Figure 3 Side view of the overall structure provided by the embodiment of the present invention;

[0028] Figure 4 is Figure 3 Schematic diagram after being cut along the section line A-A in

[0029] Figure 5 Front view of the overall structure provided by the embodiment of the present invention;

[0030] Figure 6 is Figure 5 Schematic diagram after being cut along the section line C-C in

[0031] In the drawings, the list of components represented by each reference numeral is as follows:

[0032] 1. Gear selection mechanism; 2. Box body; 3. Power input mechanism; 4. First power transmission mechanism; 5. Second power transmission mechanism; 6. Power output mechanism; 7. Spline sleeve; 11. Rocker arm; 12. Hinge shaft; 13. Locking bolt; 14. Locking hole; 15. Fork shaft; 16. Fork; 17. Dial block; 21. Front box body; 22. Intermediate box body; 23. Rear box body; 31. Input shaft; 32. First input bearing; 33. Second input bearing; 34. Input shaft oil seal; 35. Input shaft driving gear; 41. First intermediate shaft; 42. First intermediate bearing; 43. Second intermediate bearing; 44. Intermediate shaft driving gear; 45. First spacer; 51. Second intermediate shaft; 52. Intermediate shaft driven gear; 53. Third intermediate bearing; 54. Fourth intermediate bearing; 55. Fifth intermediate bearing; 56. Active bevel gear; 57. Intermediate shaft spline teeth; 61. Output shaft; 62. First output bearing; 63. Second output bearing; 64. Second spacer; 65. Output shaft oil seal; 231. Oil filling hole; 232. Observation hole; 233. Oil drain hole; 411. Intermediate shaft gear. Detailed Implementation Modes

[0033] The principles and features of the present invention are described below. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0034] like Figures 1 to 6 As shown, a cylindrical gear speed-increasing bottom knife transmission box includes: a gear selection mechanism 1, a box body 2, a power input mechanism 3, a first power transmission mechanism 4, a second power transmission mechanism 5, a power output mechanism 6 and a spline sleeve 7; the gear selection mechanism 1 is connected to the spline sleeve 7, the power input mechanism 3, the first power transmission mechanism 4, the second power transmission mechanism 5 and the power output mechanism 6 are all arranged in the box body 2, the power input mechanism 3 is connected to the first power transmission mechanism 4, the first power transmission mechanism 4 is connected to the second power transmission mechanism 5, the second power transmission mechanism 5 is connected to the power output mechanism 6, and the spline sleeve 7 is slidably connected to the second power transmission mechanism 5.

[0035] The beneficial effects of the utility model are as follows: the gear selection mechanism cooperates with the spline sleeve to increase the non-returning-to-field operation gear, and to select whether to return corn stalks to the field according to the actual needs of the user, thereby improving the applicability of the product and meeting the personalized needs of the user; the power input mechanism, the first power transmission mechanism, the second power transmission mechanism and the power output mechanism are all arranged in the box body, and are connected in sequence, which is conducive to reducing the volume of the speed-increasing bottom knife transmission box, simplifying the transmission mechanism, reducing production costs and maintenance costs, and improving the competitiveness of the product.

[0036] Preferably, Figure 1 and Figure 2 As shown, the box body 2 includes: a front box body 21, a middle box body 22 and a rear box body 23; the front box body 21 and the rear box body 23 are respectively arranged on both sides of the middle box body 22 through positioning pins, and bolts pass through the front box body 21 and the middle box body 22 and are connected to the rear box body 23.

[0037] The beneficial effects of adopting the above preferred solution are: it is conducive to improving the consistency of the coaxiality of the bearing holes of the front box body, the middle box body and the rear box body, and improving the connection accuracy and strength between the three boxes.

[0038] Preferably, Figure 1 and Figure 2 As shown, the top of the rear box body 23 is provided with a refueling hole 231 and an observation hole 232, and the bottom is provided with an oil drain hole 233. The refueling hole 231, the observation hole 232 and the oil drain hole 233 are all through holes that are removably blocked by screw plugs.

[0039] The beneficial effects of adopting the above preferred solution are as follows: The fuel filling hole and the oil draining hole are conducive to improving the convenience of maintenance and fuel filling when the cylindrical gear speed-increasing bottom cutter transmission box is applied to different installation positions and different installation directions. The observation hole is conducive to observing the meshing condition of the gears in the box during assembly and maintenance.

[0040] Preferably, as Figure 5 and Figure 6 shown, the gear selection mechanism 1 includes: a rocker arm 11, a hinge shaft 12, a locking bolt 13, two locking holes 14, a fork shaft 15, a fork 16 and two fork blocks 17; one end of the rocker arm 11 is hinged to the side wall of the rear box body 23 through the hinge shaft 12, the locking holes 14 are arranged on the side wall of the rear box body 23, the locking bolt 13 passes through the other end of the rocker arm 11 and is connected to the locking holes 14, the fork shaft 15 is vertically connected to one end of the rocker arm 11, the fork 16 is sleeved on the fork shaft 15, the two fork blocks 17 are respectively arranged on both sides of the bottom end of the fork 16 and are respectively connected to both sides of the spline sleeve 7, and the fork shaft 15, the fork 16 and the fork blocks 17 are all arranged in the box body 2.

[0041] The beneficial effects of adopting the above preferred solution are as follows: The rocker arm swings around the hinge shaft, which is conducive to driving the fork shaft and the fork to rotate synchronously. When the fork rotates, it will drive the fork block to swing, and then drive the spline sleeve to swing within a certain range, finally realizing the sliding connection between the spline sleeve and the second power transmission mechanism; the locking bolt fixes the rocker arm at the position of the two locking holes, which is conducive to providing a limit for the swing of the rocker arm and ultimately the swing of the spline sleeve, and at the same time prevents the rocker arm from shifting gears during power transmission and prevents the spline and gears from engaging with each other during operation.

[0042] Preferably, as Figure 4As shown, the second power transmission mechanism 5 includes: a second intermediate shaft 51, an intermediate shaft driven gear 52, a third intermediate bearing 53, a fourth intermediate bearing 54, a fifth intermediate bearing 55, a driving bevel gear 56 and an intermediate shaft spline gear 57; the intermediate shaft driven gear 52 and the driving bevel gear 56 are respectively sleeved on both ends of the second intermediate shaft 51, the third intermediate bearing 53 and the fourth intermediate bearing 54 are both sleeved on the second intermediate shaft 51, the outer wall of the third intermediate bearing 53 abuts against the inner wall of the rear housing 23, and the outer wall of the fourth intermediate bearing 54 abuts against the inner wall of the driving bevel gear 56. The inner wall of the bevel gear 56 abuts, the fifth intermediate bearing 55 is sleeved on the active bevel gear 56, and the outer wall abuts against the inner wall of the rear case 23, the intermediate shaft spline teeth 57 is sleeved on the second intermediate shaft 51, and is arranged between the third intermediate bearing 53 and the active bevel gear 56, the inner spline of the spline sleeve 7 is meshed with the intermediate shaft spline teeth 57, the outer spline of the spline sleeve 7 slides along the second intermediate shaft 51 under the toggle of the rocker arm 11, and meshes with the active bevel gear 56 when the other end of the rocker arm 11 is toggled to one of the locking holes 14.

[0043] The beneficial effects of adopting the above-mentioned preferred scheme are: the swinging of the spline sleeve within a certain range is conducive to the sliding of the spline sleeve as a whole along the second intermediate shaft, thereby realizing the engagement and disengagement of the spline sleeve and the active bevel gear. When the spline sleeve is engaged with the active bevel gear, it is conducive to transmitting power to the power output mechanism, realizing the shredding of corn stalks and returning them to the field. When the spline sleeve is disengaged from the active bevel gear, it is conducive to avoiding the transmission of power to the power output mechanism, not shredding the corn stalks and returning them to the field, and realizing the recycling of corn stalks; the third intermediate bearing, the fourth intermediate bearing and the fifth intermediate bearing are conducive to making the power transmission more stable and reducing the noise of gear meshing during the transmission process.

[0044] Preferably, Figure 4 As shown, the power output mechanism 6 includes: an output shaft 61, a first output bearing 62, a second output bearing 63, a second spacer sleeve 64 and an output shaft oil seal 65; the output shaft 61 is arranged at one end in the housing 2 and meshes with the active bevel gear 56, and is arranged at one end outside the housing 2 and connected to the tool, the first output bearing 62, the second output bearing 63, the second spacer sleeve 64 and the output shaft oil seal 65 are all arranged in the housing 2, and are all sleeved on the output shaft 61, the second spacer sleeve 64 is arranged between the first output bearing 62 and the second output bearing 63, the outer rings of the first output bearing 62 and the second output bearing 63 are in contact with the inner wall of the rear housing 23, and the output shaft oil seal 65 is in contact with the inner wall of the rear housing 23 where the output shaft 61 penetrates.

[0045] Among them, it should be noted that: in the technical solution of the present utility model, the output shaft 61 is connected to the tool installed on the whole machine through a single key.

[0046] The beneficial effects of adopting the above preferred solution are as follows: the output shaft meshes with the driving bevel gear, which is beneficial to transmit power to the external tool, and then shred the corn straw and return it to the field. The first output bearing and the second output bearing are beneficial to make the power transmission more stable. The second spacer sleeve is beneficial to avoid collision interference between bearings. The output shaft oil seal is beneficial to avoid leakage of the lubricating oil in the box body.

[0047] Preferably, as Figure 4 shown, the first power transmission mechanism 4 includes: a first intermediate shaft 41, a first intermediate bearing 42, a second intermediate bearing 43, an intermediate shaft driving gear 44 and a first spacer sleeve 45; the first intermediate bearing 42, the second intermediate bearing 43, the intermediate shaft driving gear 44 and the first spacer sleeve 45 are all sleeved on the first intermediate shaft 41. The intermediate shaft driving gear 44 meshes with the intermediate shaft driven gear 52. The first spacer sleeve 45 is arranged between the intermediate shaft driving gear 44 and the second intermediate bearing 43. The outer rings of the first intermediate bearing 42 and the second intermediate bearing 43 are respectively abutted against the inner wall of the front box body 21 and the inner wall of the intermediate box body 22. The first intermediate shaft 41 is connected to the power input mechanism 3.

[0048] Among them, it should be noted that: in the technical solution of the present utility model, the first intermediate shaft 41 is connected to the intermediate shaft driving gear 44 through a spline.

[0049] The beneficial effects of adopting the above preferred solution are as follows: the intermediate shaft driving gear meshes with the intermediate shaft driven gear, which is beneficial to transmit power from the first power transmission mechanism to the second power transmission mechanism. The first intermediate bearing and the second intermediate bearing are beneficial to make the power transmission more stable. The first spacer sleeve is beneficial to avoid collision interference between the bearing and the gear.

[0050] Preferably, as Figure 4 shown, an intermediate shaft gear 411 is wound around the circumference of the first intermediate shaft 41. The intermediate shaft gear 411 is arranged between the first intermediate bearing 42 and the second intermediate bearing 43.

[0051] The beneficial effects of adopting the above preferred solution are as follows: the intermediate shaft gear is beneficial to transmit the power of the power input mechanism to the first power transmission mechanism, and then drive the first intermediate shaft and the intermediate shaft driving gear to rotate.

[0052] Preferably, as Figure 4As shown in the figure, the power input mechanism 3 includes: an input shaft 31, a first input bearing 32, a second input bearing 33, an input shaft oil seal 34, and an input shaft driving gear 35; the first input bearing 32, the second input bearing 33, the input shaft oil seal 34, and the input shaft driving gear 35 are all arranged in the box body 2 and sleeved on the input shaft 31. The input shaft driving gear 35 is arranged between the first input bearing 32 and the second input bearing 33. The outer rings of the first input bearing 32 and the second input bearing 33 are respectively in contact with the inner wall of the front box body 21 and the inner wall of the intermediate box body 22. The input shaft oil seal 34 is in contact with the inner wall of the front box body 21 where the input shaft 31 passes through. The input shaft driving gear 35 meshes with the intermediate shaft gear 411.

[0053] Among them, it should be noted that: in the technical solution of the present invention, the input shaft 31 is connected to the input shaft driving gear 35 through a spline. The input shaft driving gear 35 is a straight-tooth cylindrical gear without axial force.

[0054] The beneficial effects of adopting the above preferred solution are: the input shaft is beneficial to driving the input shaft driving gear to rotate, and then transmitting the power to the first power transmission mechanism. The first input bearing and the second input bearing are beneficial to making the power transmission more stable. The input shaft oil seal is beneficial to preventing the lubricating oil in the box body from leaking.

[0055] Preferably, one end of the input shaft 31 arranged outside the box body 2 is connected to the universal shaft of the transmission box of the corn harvester through a spline.

[0056] The beneficial effects of adopting the above preferred solution are: it is beneficial to transmit the power in the transmission box of the corn harvester to the power input mechanism through the universal shaft and the input shaft.

[0057] The working process of the present invention will be described below through two embodiments:

[0058] Such as Figures 1 to 6As shown, when the user needs to shred corn straw and return it to the field, the rocker arm 11 is toggled around the hinge shaft 12 to one of the locking holes 14, and the end of the rocker arm 11 away from the hinge shaft 12 is fixed to the locking hole 14 using the locking bolt 13. During the swinging process of the rocker arm 11, the rocker arm 11 drives the fork shaft 15 to rotate and the fork 16 sleeved on the fork shaft 15 to swing. The fork 16 drives the block 17 to swing, and the block 17 drives the spline sleeve 7 to swing along the second intermediate shaft 51. Since the final swinging angle of the block 17 is limited by the distance between the two locking holes 14, although the block 17 drives the spline sleeve 7 to swing, overall there will still be a reciprocating displacement of the spline sleeve 7 in a certain direction. When the spline sleeve 7 displaces towards the driving bevel gear 56 and meshes with the driving bevel gear 56, power can be transmitted from the intermediate shaft spline teeth 57 and the spline sleeve 7 to the driving bevel gear 56, and then through the driving bevel gear 56 to the power output mechanism 6 to drive the external cutter to shred the corn straw, and the shredded corn straw is then returned to the field;

[0059] When the user needs to recycle the corn straw, the rocker arm 11 is toggled around the hinge shaft 12 in the reverse direction to the other locking hole 14, and the end of the rocker arm 11 away from the hinge shaft 12 is fixed to the locking hole 14 using the locking bolt 13. The spline sleeve 7 can be disengaged from the driving bevel gear 56, and power cannot be transmitted to the power output mechanism 6, so the corn straw cannot be shredded, realizing the recycling of the corn straw.

[0060] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship 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 therefore should not be construed as a limitation of the present invention.

[0061] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0062] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "coupling", "fixing", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0063] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature is at a higher level than the second feature in terms of horizontal height. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature is at a lower level than the second feature in terms of horizontal height.

[0064] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0065] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.

Claims

1. A cylindrical gear speed increasing bed knife transmission box, characterized in that: include: A gear selection mechanism (1), a housing (2), a power input mechanism (3), a first power transmission mechanism (4), a second power transmission mechanism (5), a power output mechanism (6) and a spline sleeve (7); the gear selection mechanism (1) is connected to the spline sleeve (7); the power input mechanism (3), the first power transmission mechanism (4), the second power transmission mechanism (5) and the power output mechanism (6) are all arranged in the housing (2); the power input mechanism (3) is connected to the first power transmission mechanism (4); the first power transmission mechanism (4) is connected to the second power transmission mechanism (5); the second power transmission mechanism (5) is connected to the power output mechanism (6); and the spline sleeve (7) is slidably connected to the second power transmission mechanism (5).

2. According to claim 1, a cylindrical gear speed increasing bed knife transmission box is characterized in that: The box body (2) comprises: a front box body (21), an intermediate box body (22) and a rear box body (23); the front box body (21) and the rear box body (23) are respectively arranged on both sides of the intermediate box body (22) through positioning pins, and bolts pass through the front box body (21) and the intermediate box body (22) and are connected to the rear box body (23).

3. A cylindrical gear speed increasing bed knife transmission box according to claim 2, characterized in that: The top of the rear box body (23) is provided with a refueling hole (231) and an observation hole (232), and the bottom is provided with an oil drain hole (233); the refueling hole (231), the observation hole (232) and the oil drain hole (233) are all through holes that are detachably blocked by screw plugs.

4. A cylindrical gear speed increasing bed knife transmission box according to claim 2, characterized in that: The gear selection mechanism (1) comprises: a rocker arm (11), an articulated shaft (12), a locking bolt (13), two locking holes (14), a fork shaft (15), a shift fork (16) and two shift blocks (17); one end of the rocker arm (11) is hinged to the side wall of the rear box body (23) through the articulated shaft (12); the locking hole (14) is arranged on the side wall of the rear box body (23); the locking bolt (13) passes through the rocker arm (11) and is 1), and is connected to the locking hole (14); the fork shaft (15) is vertically connected to one end of the rocker arm (11); the shift fork (16) is sleeved on the fork shaft (15); the two shift blocks (17) are respectively arranged on both sides of the bottom end of the shift fork (16) and are respectively connected to both sides of the spline sleeve (7); the fork shaft (15), the shift fork (16) and the shift blocks (17) are all arranged in the housing (2).

5. A cylindrical gear speed increasing bed knife transmission box according to claim 4, characterized in that: The second power transmission mechanism (5) comprises: a second intermediate shaft (51), an intermediate shaft driven gear (52), a third intermediate bearing (53), a fourth intermediate bearing (54), a fifth intermediate bearing (55), a driving bevel gear (56) and an intermediate shaft spline gear (57); the intermediate shaft driven gear (52) and the driving bevel gear (56) are respectively sleeved on both ends of the second intermediate shaft (51), the third intermediate bearing (53) and the fourth intermediate bearing (54) are both sleeved on the second intermediate shaft (51), the outer wall of the third intermediate bearing (53) is in contact with the inner wall of the rear housing (23), and the outer wall of the fourth intermediate bearing (54) is in contact with the inner wall of the driving bevel gear (56). The inner wall of the bevel gear (56) is abutted against the inner wall of the bevel gear (56), the fifth intermediate bearing (55) is sleeved on the active bevel gear (56), and the outer wall thereof is abutted against the inner wall of the rear housing (23), the intermediate shaft spline teeth (57) are sleeved on the second intermediate shaft (51), and are arranged between the third intermediate bearing (53) and the active bevel gear (56), the inner spline of the spline sleeve (7) is meshed with the intermediate shaft spline teeth (57), the outer spline of the spline sleeve (7) slides along the second intermediate shaft (51) under the toggle of the rocker arm (11), and meshes with the active bevel gear (56) when the other end of the rocker arm (11) is toggle to one of the locking holes (14).

6. A cylindrical gear speed increasing bed knife transmission box according to claim 5, characterized in that: The power output mechanism (6) comprises: an output shaft (61), a first output bearing (62), a second output bearing (63), a second spacer sleeve (64) and an output shaft oil seal (65); one end of the output shaft (61) arranged in the housing (2) is meshed with the active bevel gear (56), and the other end arranged outside the housing (2) is connected to the tool; the first output bearing (62), the second output bearing (63), the second spacer sleeve (64) and the output shaft oil seal (65) are all arranged in the housing (2) and are sleeved on the output shaft (61); the second spacer sleeve (64) is arranged between the first output bearing (62) and the second output bearing (63); the outer rings of the first output bearing (62) and the second output bearing (63) are in contact with the inner wall of the rear housing (23); and the output shaft oil seal (65) is in contact with the inner wall of the rear housing (23) where the output shaft (61) penetrates.

7. A cylindrical gear speed increasing bed knife transmission box according to claim 5, characterized in that: The first power transmission mechanism (4) comprises: a first intermediate shaft (41), a first intermediate bearing (42), a second intermediate bearing (43), an intermediate shaft driving gear (44) and a first spacer (45); the first intermediate bearing (42), the second intermediate bearing (43), the intermediate shaft driving gear (44) and the first spacer (45) are all sleeved on the first intermediate shaft (41); the intermediate shaft driving gear (44) is meshed with the intermediate shaft driven gear (52); the first spacer (45) is arranged between the intermediate shaft driving gear (44) and the second intermediate bearing (43); the outer ring of the first intermediate bearing (42) and the outer ring of the second intermediate bearing (43) are respectively in contact with the inner wall of the front housing (21) and the inner wall of the intermediate housing (22); and the first intermediate shaft (41) is connected to the power input mechanism (3).

8. A cylindrical gear speed increasing bed knife transmission box according to claim 7, characterized in that: An intermediate shaft gear (411) is disposed around the circumference of the first intermediate shaft (41), and the intermediate shaft gear (411) is disposed between the first intermediate bearing (42) and the second intermediate bearing (43).

9. A cylindrical gear speed increasing bed knife transmission box according to claim 8, characterized in that: The power input mechanism (3) comprises: an input shaft (31), a first input bearing (32), a second input bearing (33), an input shaft oil seal (34) and an input shaft driving gear (35); the first input bearing (32), the second input bearing (33), the input shaft oil seal (34) and the input shaft driving gear (35) are all arranged in the housing (2) and sleeved on the input shaft (31); the input shaft driving gear (35) is arranged between the first input bearing (32) and the second input bearing (33); the outer ring of the first input bearing (32) and the outer ring of the second input bearing (33) are respectively in contact with the inner wall of the front housing (21) and the inner wall of the intermediate housing (22); the input shaft oil seal (34) is in contact with the inner wall of the front housing (21) where the input shaft (31) penetrates; and the input shaft driving gear (35) is meshed with the intermediate shaft gear (411).

10. A cylindrical gear speed increasing bed knife transmission box according to claim 9, characterized in that: One end of the input shaft (31) disposed outside the housing (2) is connected to the universal shaft of the transmission box of the corn harvester via a spline.

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