Lifting gear box for grain collection of wheat machine and harvester

Abstract

The utility model provides a lifting gear box for collecting grains of a wheat machine and a harvester. A lifting gear box for grain collection of a wheat machine comprises a ventilation oil pipe, an input shaft, a first oil seal, a first end cover, a shell, a second end cover, an output shaft, a through cover, a second oil seal and a shifting fork, the ventilation oil pipe is connected with the shell, an oil drainage hole is formed in the shell, the input shaft and the output shaft are both installed in the shell, and the first end cover is connected with the second end cover. The input shaft is in transmission connection with the output shaft, the first oil seal and the first end cover are arranged on the input shaft in a sleeving mode, the first oil seal is installed in the first end cover, and the first end cover, the second end cover and the through cover are all connected with the shell. The through cover and the second oil seal are both arranged on the output shaft in a sleeving mode, the second oil seal is installed in the second end cover, and the shifting fork is connected with the output shaft.

Description

TECHNICAL FIELD

[0001] The utility model relates to grain lifting equipment technical field especially relates to a lifting tooth box for wheat machine grain collection and harvester. BACKGROUND

[0002] The lifting tooth box for wheat machine grain collection is one of important work components of grain conveying system on wheat machine harvesting machinery, and its main function is to transport the wheat output from the cylinder to the storage cylinder through the stirrer, and finally unload from the storage cylinder to the transport vehicle, so that the whole process of grain collection is realized, and the power demand for the whole machine grain transfer is provided.

[0003] At present, the mainstream lifting tooth box for grain collection in the market generally has the problems of oil leakage caused by oil seal of the shifting fork during the rotation of the lifting tooth box and stirring, and gear lubrication damage caused by poor internal cleanliness of the gear box due to the environmental pollution of the breather plug. UTILITY MODEL CONTENTS

[0004] The utility model solves the technical problem of the prior art, and provides a lifting tooth box for wheat machine grain collection and a harvester.

[0005] The utility model solves the technical problem by the following technical scheme: a lifting tooth box for wheat machine grain collection, comprising: an air oil pipe, an input shaft, a first oil seal, a first end cover, a shell, a second end cover, an output shaft, a cover, a second oil seal and a shifting fork, the air oil pipe is connected with the shell, the shell is provided with a drain hole, the input shaft and the output shaft are both installed in the shell, the input shaft is in transmission connection with the output shaft, the first oil seal and the first end cover are sleeved on the input shaft, the first oil seal is installed in the first end cover, the first end cover, the second end cover and the cover are all connected with the shell, the cover and the second oil seal are both sleeved on the output shaft, the second oil seal is installed in the second end cover, and the shifting fork is connected with the output shaft.

[0006] The utility model has the beneficial effects that the output shaft drives the shifting fork to effectively prevent dust sealing during stirring, reduces the market failure rate of oil seal damage, and through the design of the air oil pipe, the functions of adding lubricating oil and ventilating during the operation of the lifting tooth box are realized, the existing market problems and maintenance costs of the lifting tooth box are effectively reduced. The appearance of the lifting tooth box for wheat machine grain collection is optimized and designed on the basis of the existing ordinary tooth box, the drain hole is added to the side surface of the lifting tooth box, and the breather hole is added to the side surface, which is beneficial to the maintenance of the internal gear, improves the quality and service life of the product. The input shaft is sealed by the first oil seal. The output shaft is connected with the shifting fork, power is transmitted from the output shaft to the shifting fork, the shifting fork drives the stirrer of the whole machine to rotate, and thus the grain is transferred from the grain collecting cylinder to the storage cylinder.

[0007] Further, the input shaft is provided with a driving bevel gear, and the output shaft is provided with a driven bevel gear, and the driving bevel gear is engaged with the driven bevel gear.

[0008] The beneficial effect of the above further technical solution is that the driving bevel gear is engaged with the driven bevel gear to transmit power to the output shaft.

[0009] Further, the engagement gap of the driving bevel gear and the driven bevel gear is 0.25-0.35.

[0010] The beneficial effect of the above further technical solution is that the engagement gap of the driving bevel gear and the driven bevel gear is required to be 0.25-0.35, which ensures the engagement gap requirement between the driving bevel gear and the driven bevel gear. Through the design of new layout and structure, the accuracy of the adjustment engagement mark of the wheat machine grain collecting and lifting gear box bevel gear is realized.

[0011] Further, the shift fork is connected with the output shaft through a spline, and the output shaft is provided with a first locking nut and a second locking nut at both ends, and flat washers are arranged between the first locking nut and the driven bevel gear and between the second locking nut and the shift fork.

[0012] The beneficial effect of the above further technical solution is that the output shaft is connected with the shift fork through a spline, and power is transmitted from the output shaft to the shift fork, and the shift fork drives the whole machine stirring dragon to rotate, so as to realize the transfer of grain from the grain collecting cylinder to the storage cylinder. The driven bevel gear, the third ball bearing, the spacer sleeve and the fourth ball bearing are arranged on the output shaft, and the whole output shaft is connected and fastened through flat washers and locking nuts, and is arranged in the bearing seat.

[0013] Further, the output shaft is provided with a locking groove, and the second locking nut is connected with the locking groove.

[0014] The beneficial effect of the above further technical solution is that the locking groove is opened in the threaded shaft part of the output shaft to prevent the second locking nut from falling out. After the second locking nut is arranged in the output shaft, a special tool is used to knock the second locking nut edge into the locking groove of the output shaft, which plays a role in preventing the second locking nut from falling out.

[0015] Further, the input shaft is connected with a whole machine belt pulley through a flat key, the input shaft is connected with the driving bevel gear through a spline, and the input shaft is provided with a first ball bearing, a retainer and a second ball bearing, the retainer is abutted with the driving bevel gear, and the first ball bearing and the second ball bearing are arranged in the housing.

[0016] The beneficial effect of the further technical scheme is that the new layout and structure are designed to realize the optimization design under the condition that the existing transmission route and transmission mode remain unchanged, so that the lifting gear box is firmly connected with the grain collecting box.

[0017] Further, the output shaft is sleeved with a third ball bearing, a spacer sleeve and a fourth ball bearing, the third ball bearing and the fourth ball bearing are installed in the housing through bearing seats, and the spacer sleeve is located between the third ball bearing and the fourth ball bearing.

[0018] The beneficial effect of the further technical scheme is that the adjustment of the gasket adjusts the cover, so that the driven bevel gear, the third ball bearing, the spacer sleeve, the fourth ball bearing and the output shaft are fixed as a whole between the bearing seat and the cover, and the position of the driven bevel gear is ensured after being installed in the housing.

[0019] Further, the cover is provided with a groove labyrinth, the shift fork is provided with a boss labyrinth, and the boss labyrinth is located in the groove labyrinth.

[0020] The beneficial effect of the further technical scheme is that the groove labyrinth is designed on the cover, and the boss labyrinth is designed on the shift fork to prevent dust and impurities from entering the oil seal lip, and a small gap is reserved between the cover and the shift fork after assembly, so that impurities are difficult to enter the vicinity of the second oil seal and contact the oil seal lip of the second oil seal to cause oil leakage of the second oil seal. In order to prevent impurities from contacting the second oil seal, the gap between the cover and the output shaft is reduced, which effectively prevents dust from entering the vicinity of the oil seal lip and causes oil leakage due to damage of the oil seal.

[0021] Further, the oil drain hole in the housing is installed with an oil drain plug, the oil drain hole is located at the bottom of the housing, the side surface of the housing is provided with a vent hole, the vent oil pipe is connected with the vent hole of the housing, the free end of the vent oil pipe is installed with a vent plug, and the height of the free end of the vent oil pipe is higher than the height of the housing.

[0022] The beneficial effects of the further technical scheme are that the appearance of the lifting gear box for wheat machine grain collecting is optimized and designed on the basis of the existing ordinary gear box, oil discharge holes are added to the side surface of the lifting gear box, and the side surface has air holes, which is beneficial to the maintenance of the internal gears, improves the quality and service life of the product, and the lifting gear box for wheat machine grain collecting is internally added with lubricating gear oil, the internal temperature rises when working, and a timing device is needed, but the lifting gear box is located at a low position of the wheat harvester and is easy to be polluted by dust, so the air plug is specially designed, and the oil filler is needed to add lubricating oil for regular maintenance, and the oil discharge hole discharges the used and polluted lubricating oil, the oil discharge plug is located at the bottom of the gear box, and the internal lubricating oil of the gear box can be completely discharged when discharging oil, the air oil pipe has the functions of balancing the internal pressure of the gear box and adding the lubricating grease for maintenance, the air oil pipe is relatively long and is higher than the height of the lifting gear box, and the air oil pipe can effectively prevent dust and impurities from entering the gear box and causing the pollution and deterioration of the lubricating oil.

[0023] In addition, the utility model provides a kind of harvester, including the lifting gear box for wheat machine grain collecting described in any one of the above.

[0024] The beneficial effects of the technical scheme of the utility model are that the output shaft drives the fork to drive the stirring dragon, effectively preventing dust from entering, reducing the market failure rate of oil seal damage, and through the design of the air oil pipe, the functions of adding lubricating oil and ventilating during the operation of the lifting gear box are realized, effectively reducing the existing market problems and maintenance cost of the lifting gear box, the appearance of the lifting gear box for wheat machine grain collecting is optimized and designed on the basis of the existing ordinary gear box, oil discharge holes are added to the side surface of the lifting gear box, and the side surface has air holes, which is beneficial to the maintenance of the internal gears, improves the quality and service life of the product, the input shaft input part is sealed by the first oil seal, the output shaft is connected with the fork, power is transmitted from the output shaft to the fork, the fork drives the whole machine stirring dragon to rotate, so as to realize the transfer of grain from the grain collecting cylinder to the storage cylinder.

[0025] The advantages of the additional aspects of the utility model will be partially given in the following description, some will become apparent from the following description, or will be understood by the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 A structure schematic view of the lifting gear box for wheat machine grain collecting provided by the embodiment of the utility model.

[0027] Figure 2 A structure schematic view of the lifting gear box for wheat machine grain collecting provided by the embodiment of the utility model.

[0028] Figure 3 A structure schematic view of the lifting gear box for wheat machine grain collecting provided by the embodiment of the utility model.

[0029] Figure 4 The structure diagram four of the lifting tooth box for collecting wheat of the wheat machine is provided.

[0030] The input shaft 3, the first oil seal 4, the first end cover 5, the housing 7, the second end cover 11, the output shaft 17, the cover 19 and the second oil seal 20 are all connected with the housing 7. DETAILED DESCRIPTION

[0031] The principles and characteristics of the utility model are described below in combination with the drawings, and the examples are only used for explaining the utility model and are not used for limiting the range of the utility model.

[0032] As shown in Figures 1 to 4 The utility model discloses a lifting tooth box for collecting wheat of wheat machine, including: air pipe 1, input shaft 3, first oil seal 4, first end cover 5, housing 7, second end cover 11, output shaft 17, cover 19, second oil seal 20, shift fork 21, air pipe 1 is connected with housing 7, is equipped with oil drain hole on housing 7, input shaft 3 and output shaft 17 are installed in housing 7, input shaft 3 is connected with output shaft 17 transmission, first oil seal 4 and first end cover 5 are set in input shaft 3, first oil seal 4 is installed in first end cover 5, first end cover 5 second end cover 11 and cover 19 are all connected with housing 7, cover 19 and second oil seal 20 are all set in output shaft 17, second oil seal 20 is installed in second end cover 11, shift fork 21 is connected with output shaft 17.

[0033] The beneficial effect of the technical scheme of the utility model is: the output shaft drives the shift fork to drive the stirring auger, effective dustproof sealing is realized in the process, the market failure rate of oil seal damage is reduced, and through the design of the venting oil pipe, the function of adding lubricating oil is realized, the venting function during the operation of the lifting gear box is realized, the existing market problems and maintenance costs of the lifting gear box are effectively reduced, and the competitiveness of the product is improved.

[0034] The new layout and structure are designed, the optimization design is realized under the condition that the existing transmission route and transmission mode are unchanged, the lifting gear box is firmly connected with the grain collecting box, effective dustproof sealing is realized in the process that the output shaft drives the shift fork to drive the stirring auger, the market failure rate of oil seal damage is reduced, and through the design of the new venting pipe (vent oil pipe 1), the function of adding lubricating oil is realized, the venting function during the operation of the lifting gear box is realized, the existing market problems and maintenance costs of the lifting gear box are effectively reduced, and the competitiveness of the product is improved.

[0035] The new layout and structure are designed, the optimization design is realized under the condition that the existing transmission route and transmission mode are unchanged, the lifting gear box is firmly connected with the grain collecting box, effective dustproof sealing is realized in the process that the output shaft drives the shift fork to drive the stirring auger, the market failure rate of oil seal damage is reduced, and through the design of the new venting pipe (vent oil pipe 1), the function of adding lubricating oil is realized, the venting function during the operation of the lifting gear box is realized, the existing market problems and maintenance costs of the lifting gear box are effectively reduced, and the competitiveness of the product is improved.

[0036] As shown in Figures 1 to 4 Further, the input shaft 3 is provided with a driving bevel gear 9, and the output shaft 17 is provided with a driven bevel gear 13, and the driving bevel gear 9 is engaged with the driven bevel gear 13.

[0037] The beneficial effect of the above further technical scheme is that the driving bevel gear is engaged with the driven bevel gear, and power is transmitted to the output shaft.

[0038] As shown in Figures 1 to 4 Further, the engagement gap of the driving bevel gear 9 and the driven bevel gear 13 is 0.25-0.35.

[0039] The beneficial effect of the above further technical scheme is that the engagement gap of the driving bevel gear and the driven bevel gear is required to be 0.25-0.35, so that the engagement gap requirement between the driving bevel gear and the driven bevel gear is ensured.

[0040] As shown inFigures 1 to 4 Further, the shifting fork 21 is connected with the output shaft 17 through spline, and the first locking nut 12 and the second locking nut 23 are installed at two ends of the output shaft 17, and the flat pad 22 is installed between the first locking nut 12 and the passive bevel gear 13 and between the second locking nut 23 and the shifting fork 21.

[0041] The beneficial effect of the above further technical scheme is that the output shaft and the shifting fork are connected through spline, power is transmitted from the output shaft to the shifting fork, and the shifting fork drives the whole machine stirring dragon to rotate, so that the grain is transported from the grain collecting cylinder to the storage cylinder. The passive bevel gear, the third ball bearing, the spacer sleeve and the fourth ball bearing are installed on the output shaft, and the flat pad and the locking nut are used to connect and fasten the parts on the whole output shaft and are installed in the bearing seat.

[0042] Further, the output shaft 17 is provided with a locking groove, and the second locking nut 23 is connected with the locking groove.

[0043] The beneficial effect of the above further technical scheme is that the locking groove is opened in the threaded shaft part of the output shaft to prevent the second locking nut from falling out. After the second locking nut is installed in the output shaft, a special tool is used to knock the second locking nut edge flat into the locking groove of the output shaft, so as to prevent the second locking nut from falling out.

[0044] As shown in Figures 1 to 4 Further, the input shaft 3 is connected with the whole machine belt pulley through a key, the input shaft 3 is connected with the driving bevel gear 9 through spline, the first ball bearing 6, the retainer ring 8 and the second ball bearing 10 are sleeved on the input shaft 3, the retainer ring 8 abuts against the driving bevel gear 9, and the first ball bearing 6 and the second ball bearing 10 are installed in the housing 7.

[0045] The beneficial effect of the above further technical scheme is that the new layout and structure are designed to realize the optimization design under the condition that the existing transmission route and transmission mode are unchanged, so that the lifting gear box and the grain collecting box are firmly connected. The input shaft and the whole machine belt pulley are connected through a key. The input shaft and the driving bevel gear are connected through inner and outer spline to realize power transmission. The input shaft is supported and bears force through the first ball bearing and the second ball bearing at both ends.

[0046] As shown in Figures 1 to 4 Further, the output shaft 17 is sleeved with the third ball bearing 14, the spacer sleeve 15 and the fourth ball bearing 16, the third ball bearing 14 and the fourth ball bearing 16 are installed in the housing 7 through the bearing seat 18, and the spacer sleeve 15 is located between the third ball bearing 14 and the fourth ball bearing 16.

[0047] The beneficial effect of the further technical scheme is that the passive bevel gear, the third ball bearing, the spacer sleeve, the fourth ball bearing and the output shaft are fixed as a whole between the bearing seat and the cover, and the position of the passive bevel gear is ensured after being installed in the shell.

[0048] As shown in Figures 1 to 4 Further, the cover 19 is provided with a groove labyrinth, and the yoke 21 is provided with a boss labyrinth, and the boss labyrinth is located in the groove labyrinth.

[0049] The beneficial effect of the further technical scheme is that the groove labyrinth is designed on the cover to prevent dust and impurities from entering the oil seal lip, and the boss labyrinth is designed on the yoke. After the cover and the yoke are assembled, a small gap is reserved in the middle, and it is difficult for impurities to enter the vicinity of the second oil seal to contact the oil seal lip of the second oil seal to cause oil leakage of the second oil seal. In order to prevent impurities from contacting the second oil seal, the gap between the cover and the output shaft is reduced, which effectively prevents dust from entering the vicinity of the oil seal lip to cause oil leakage due to damage of the oil seal.

[0050] As shown in Figures 1 to 4 Further, the oil drain plug 2 is installed in the oil drain hole on the shell 7, the oil drain hole is located at the bottom of the shell 7, the side of the shell 7 is provided with a vent hole, the vent oil pipe 1 is connected with the vent hole of the shell 7, the free end of the vent oil pipe 1 is provided with a vent plug, and the height of the free end of the vent oil pipe 1 is higher than the height of the shell 7.

[0051] The beneficial effect of the further technical scheme is that the appearance of the lifting tooth box for wheat machine grain collection is optimized and designed on the basis of the existing ordinary tooth box. The oil drain hole is increased on the side of the lifting tooth box, and the vent hole is beneficial to the maintenance of the internal gear, improves the quality and service life of the product. The lubricating gear oil is added in the lifting tooth box for wheat machine grain collection. When working, the internal temperature rises, and a periodic device is needed. However, the lifting tooth box is located at a low position of the wheat harvester, which is easy to be contaminated by dust. Therefore, the vent plug is specially designed, and the oil filler is needed for periodic maintenance to add lubricating oil. The oil drain hole discharges the used contaminated lubricating oil. The oil drain plug is located at the bottom of the tooth box, and the internal lubricating oil of the tooth box can be completely discharged clean during oil discharge. The vent oil pipe has the functions of balancing the internal pressure of the tooth box and adding maintenance lubricating grease. The vent oil pipe is relatively long and higher than the height of the entire lifting tooth box, which can effectively prevent dust and impurities from entering the internal tooth box to cause contamination and deterioration of the lubricating oil.

[0052] As shown in Figures 1 to 4As shown, the utility model embodiment provides a kind of wheat machine grain collecting lifting tooth box, mainly by air pipe 1, oil drain screw plug 2, input shaft 3, first end cover 5, shell 7, baffle ring 8, driving bevel gear 9, second end cover 11, first locking nut 12, passive bevel gear 13, spacer 15, output shaft 17, cover 19, fork 21, flat pad 22, second locking nut 23, ball bearing and oil seal and other components are formed.

[0053] The utility model embodiment provides a kind of new wheat machine grain collecting lifting tooth box (wheat machine grain collecting lifting tooth box) input shaft 3 of the whole machine pulley is connected by key.The input shaft 3 is connected by internal and external spline with driving bevel gear 9, realizes power transmission.Input shaft 3 both ends are supported by ball bearing (first ball bearing 6 and second ball bearing 10) bearing capacity, and input shaft 3 input part adopts first oil seal 4 sealing, and first oil seal 4 is installed on first end cover 5.

[0054] Driving bevel gear 9 is engaged with passive bevel gear 13, and power is transmitted to output shaft 17.Output shaft 17 is connected by spline with fork 21, and power is transmitted from output shaft 17 to fork 21, and fork 21 drives the whole machine stirring dragon to rotate, to realize that grain is transferred from grain collecting cylinder to storage cylinder.Especially: the meshing clearance requirement between driving bevel gear 9 and passive bevel gear 13 is between 0.25-0.35, during assembly, passive bevel gear 13 is assembled first, then input shaft 3, first ball bearing 6, baffle ring 8, driving bevel gear 9, second ball bearing 10 are assembled.By adjusting the gap between first end cover 5 and second end cover 11 and ball bearing through adjusting pad, the meshing clearance requirement between driving bevel gear 9 and passive bevel gear 13 is ensured.

[0055] As Figures 1 to 4 As shown, the utility model embodiment provides a kind of new wheat machine grain collecting lifting tooth box, and passive bevel gear 13, third ball bearing 14, spacer 15, fourth ball bearing 16 of the utility model embodiment are installed on output shaft 17, and the whole output shaft 17 is connected fastening by flat pad 22 and second locking nut 23, and is assembled into bearing seat 18.Especially: 1, after the above-mentioned piece is connected and assembled into bearing seat 18, cover 19 is adjusted by adjusting pad, so that passive bevel gear 13, third ball bearing 14, spacer 15, fourth ball bearing 16, output shaft 17 are fixed as a whole between bearing seat 18 and cover 19, and after being assembled into shell 7, the position of passive bevel gear 13 is ensured not to move;2, flat pad 22 and second locking nut 23 are assembled to output shaft 17, to prevent second locking nut 23 from coming off, locking groove is opened in output shaft 17 threaded shaft portion.Second locking nut 23 is assembled into output shaft 17, and second locking nut 23 is knocked flat into locking groove of output shaft 17 with special tool, and second locking nut 23 is prevented from loosening.

[0056] As Figures 1 to 4 The utility model discloses an output shaft 17 part of a novel wheat machine grain collecting and lifting tooth box (wheat machine grain collecting and lifting tooth box) is equipped with a through cover 19, a shift fork 21, a flat pad 22 and a second locking nut 23, and the output shaft 17 part is equipped with a second oil seal 20.

[0057] The utility model discloses a wheat machine grain collecting and lifting tooth box, which is internally filled with lubricating gear oil, and needs a synchronous device when the internal temperature rises during work.

[0058] The utility model discloses a wheat machine grain collecting and lifting tooth box, which is internally filled with lubricating gear oil, and needs a synchronous device when the internal temperature rises during work.

[0059] In addition, the utility model also provides a harvester, which comprises the wheat machine grain collecting and lifting tooth box according to any one of the above.

[0060] The beneficial effect of the technical scheme of the utility model is: effective dustproof sealing in the process that the output shaft drives the shift fork to drive the stirring dragon, reduces the market failure rate of oil seal damage, and through the design of the breather oil pipe, both the function of adding lubricating oil and the ventilation function during the operation of the lifting gear box are realized, effectively reducing the existing market problems and maintenance cost of the lifting gear box. The appearance of the lifting gear box for wheat machine grain collecting is optimized and designed, and the design is based on the existing ordinary gear box, an oil discharge hole is added to the side surface of the lifting gear box, and the side surface has a breather hole, which is beneficial to the maintenance of the internal gear, improves the quality and service life of the product. The input part of the input shaft is sealed by the first oil seal. The output shaft is connected with the shift fork, power is transmitted from the output shaft to the shift fork, the shift fork drives the whole machine stirring dragon to rotate, so that the grain is transferred from the grain collecting cylinder to the storage cylinder.

[0061] Finally, it should be noted that: the above embodiments are only used to illustrate the technical scheme of the utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical scheme recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical scheme deviate from the scope of the technical scheme of the embodiments of the utility model.

Claims

1. A grain elevator for a wheat machine, characterized in that, The utility model provides a venting oil pipe (1), input shaft (3), first oil seal (4), first end cover (5), casing (7), second end cover (11), output shaft (17), cover (19), second oil seal (20), shift fork (21), the venting oil pipe (1) is connected with the casing (7), be equipped with oil drain hole on the casing (7), the input shaft (3) and the output shaft (17) are installed in the casing (7), the input shaft (3) is transmission connection with the output shaft (17), the first oil seal (4) and the first end cover (5) are set on the input shaft (3), the first oil seal (4) is installed in the first end cover (5), the first end cover (5) the second end cover (11) and the cover (19) are connected with the casing (7), the cover (19) and the second oil seal (20) are set on the output shaft (17), the second oil seal (20) is installed in the second end cover (11), the shift fork (21) is connected with the output shaft (17). The input shaft (3) is provided with a driving bevel gear (9), the output shaft (17) is provided with a driven bevel gear (13), the driving bevel gear (9) is engaged with the driven bevel gear (13).

2. A grain elevator bevel gear box for a wheat machine according to claim 1, characterized in that, The engagement gap of the driving bevel gear (9) and the driven bevel gear (13) is 0.25-0.

35.

3. A grain elevator sprocket wheel for a wheat machine according to claim 2, characterised in that, The shift fork (21) is connected with the output shaft (17) through the spline, the output shaft (17) is provided with a first locking nut (12) and a second locking nut (23) at both ends, the first locking nut (12) and the driven bevel gear (13) and the second locking nut (23) and the shift fork (21) are all provided with flat pads (22).

4. A grain elevator sprocket wheel for a wheat machine according to claim 2, characterized in that, The output shaft (17) is provided with a locking groove, and the second locking nut (23) is connected with the locking groove.

5. A grain elevator sprocket wheel for a wheat machine according to claim 4, characterised in that, The input shaft (3) is connected with a whole machine belt pulley through a flat key, the input shaft (3) is connected with the driving bevel gear (9) through the spline, the input shaft (3) is provided with a first ball bearing (6), a retainer (8) and a second ball bearing (10), the retainer (8) abuts against the driving bevel gear (9), and the first ball bearing (6) and the second ball bearing (10) are installed in the casing (7).

6. A grain elevator sprocket wheel for a wheat machine according to claim 2, characterized in that, The output shaft (17) is provided with a third ball bearing (14), a spacer sleeve (15) and a fourth ball bearing (16), the third ball bearing (14) and the fourth ball bearing (16) are installed in the casing (7) through a bearing seat (18), and the spacer sleeve (15) is located between the third ball bearing (14) and the fourth ball bearing (16).

7. A grain elevator sprocket wheel for a wheat machine according to claim 1, characterized in that, The cover (19) is provided with a groove labyrinth, and the shift fork (21) is provided with a boss labyrinth, and the boss labyrinth is located in the groove labyrinth.

8. A grain elevator sprocket wheel for a wheat machine according to claim 1, characterized in that, ​ 9. A grain elevator sprocket wheel for a wheat machine according to claim 1, characterized in that, The oil drain hole on the shell (7) is equipped with an oil drain plug (2), the oil drain hole is located at the bottom of the shell (7), the side of the shell (7) is equipped with a vent hole, the vent oil pipe (1) is connected with the vent hole of the shell (7), the free end of the vent oil pipe (1) is equipped with a vent plug, the height of the free end of the vent oil pipe (1) is higher than the height of the shell (7).

10. A harvester characterized by The invention discloses a lifting sprocket case for wheat machine grain collecting, comprising a small wheat machine grain collecting lifting sprocket case.

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