Novel elbow gear box structure

Abstract

The utility model relates to a novel elbow gear box structure, and belongs to the technical field of agricultural machinery. The main box comprises a main box shell and a gear transmission mechanism, the gear transmission mechanism comprises an input shaft, an input bevel gear, an output shaft and an output bevel gear, the input shaft and the output shaft are rotationally arranged on the main box shell, and the output bevel gear is meshed with the input bevel gear; an oil cavity is formed in the main box shell, an oil injection nozzle and a through hole are formed in the main box shell, the oil injection nozzle is communicated with one side of the oil cavity through an oil injection channel, the through hole is formed in the other side of the oil cavity and communicated with the oil cavity, the through hole can be used for oil discharging of the oil cavity, and a plug is arranged on the through hole. The device is simple in structure, does not need to disassemble and assemble parts, is convenient and quick to replace lubricating oil, can discharge polluted lubricating oil, avoids abrasion of the parts such as the bevel gear and the bearing, and prolongs the service life of the parts such as the bevel gear and the bearing.

Description

Technical Field

[0001] The utility model relates to a novel elbow gearbox structure, belonging to the technical field of agricultural machinery. Background Art

[0002] The elbow gearbox is one of the important working components of the unloading system of a wheat harvester. Its main function is to provide power for the wheat harvester to collect from the cutting table roller to the unloading system, so as to realize the power transmission of wheat from the cutting table roller box to the grain box. Specifically, the auger in the unloading cylinder is connected to the input shaft in the elbow gearbox for power input, and the output shaft of the elbow gearbox can transmit power to the output auger, so that materials can be continuously output.

[0003] However, during the use process, the gear transmission structure in the elbow gearbox meshes. The wear of gear meshing will generate some pollutants such as metal chips, which will pollute the lubricating oil in the oil cavity and seriously affect the service life of components such as gears and bearings. Therefore, in order to solve the problem that the lubricating oil in the oil cavity is polluted by pollutants and affects the life of components, it is necessary to perform maintenance after the elbow gearbox has been used for a period of time, and replace the lubricating oil in the elbow gearbox. If each component is disassembled and assembled, not only is the replacement labor intensity high, but also the time is long and the efficiency is low, which will affect the working efficiency of the elbow gearbox. Summary of the Invention

[0004] Aiming at the deficiencies existing in the prior art, the utility model provides a novel elbow gearbox structure.

[0005] The technical solution for the utility model to solve the above technical problems is as follows: A novel elbow gearbox structure includes a main box housing and a gear transmission mechanism arranged in the main box housing. The main box housing is provided with an input port and an output port. The gear transmission mechanism includes an input shaft, an input bevel gear, an output shaft and an output bevel gear. The input shaft is rotatably arranged on the main box housing. The input bevel gear is arranged on the input shaft. The output bevel gear meshes with the input bevel gear. The output shaft is rotatably arranged on the main box housing. The output bevel gear is arranged on the output shaft. An oil cavity is arranged in the main box housing. The main box housing is provided with an oil filling nozzle and a through hole. The oil filling nozzle leads to one side of the oil cavity through an oil filling oil passage. The through hole is arranged on the other side of the oil cavity and communicates with the oil cavity. The through hole can drain oil from the oil cavity, and a plug is arranged on the through hole.

[0006] The beneficial effects of the present utility model are as follows: An oil injection nozzle and a through hole are provided on the main box housing of the elbow gearbox structure. The oil injection nozzle leads to the left side of the oil cavity through an oil injection oil passage, and the through hole is provided on the right side of the oil cavity. When the elbow gearbox needs to treat lubricating oil with contaminants, the plug can be opened, and lubricating oil or grease can be injected through the oil injection nozzle. The injected lubricating oil enters the interior of the elbow gearbox through the oil injection oil passage. Entering from one side of the oil cavity will push the contaminated lubricating oil towards the other side. When the contaminated lubricating oil moves to the side of the through hole, it can be discharged to the outside of the elbow gearbox through the through hole, so that the new lubricating oil can squeeze out the used lubricating oil with contaminants from the elbow gearbox. The structure of the present utility model is simple, there is no need to disassemble and assemble parts, the lubricating oil can be replaced conveniently and quickly, the wear of parts such as bevel gears and bearings can be avoided, and the service life of parts such as bevel gears and bearings can be prolonged.

[0007] On the basis of the above technical solution, the present utility model can be further improved as follows.

[0008] Further, the input shaft is arranged on the main box housing through a first input bearing and a second output bearing, and the first input bearing and the second input bearing are respectively located on both sides of the input bevel gear.

[0009] The beneficial effect of adopting the above further solution is that the input shaft is longer than the output shaft, and two input bearings are used for rotational support. Not only the support strength is improved, but also the support stability is further enhanced, making the power transmission between bevel gears more stable and the noise lower.

[0010] Further, an input oil seal is also provided between the input shaft and the main box housing, and the input oil seal is arranged outside the first input bearing.

[0011] The beneficial effect of adopting the above further solution is that the input oil seal can seal the input end side of the input shaft.

[0012] Further, the output shaft is arranged in the main box housing through an output bearing. A bearing retaining edge and a retaining ring groove for positioning the retaining ring are provided in the main box housing. The lower end face of the output bearing is positioned by the bearing retaining edge, and the upper end face is positioned by the retaining ring.

[0013] The beneficial effect of adopting the above further solution is that the output shaft is relatively short, and the number of output bearings does not need to be specified. For example, one output bearing can be used. The upper part of the output shaft is positioned by a retaining ring, and the lower part is positioned by a bearing retaining edge, which can tightly fix and stably position the output shaft, avoiding the situation of the output shaft moving up and down and being forced out.

[0014] Further, an output oil seal is provided between the output shaft and the main box housing, and the output oil seal is arranged outside the output bearing.

[0015] The beneficial effect of adopting the above further solution is that the output oil seal can seal the output end side of the output shaft.

[0016] Furthermore, at least one connecting oil passage is also provided in the main housing for connecting the oil cavities on both sides of the second input bearing.

[0017] The beneficial effect of adopting the above further solution is that the through hole is arranged inside the input shaft and outside the second input bearing at the inner end. In order to ensure the smooth connection of the oil cavities on both sides of the second input bearing, at least one connecting oil passage can be provided on the housing for positioning the second input bearing in the main housing, which is beneficial for discharging the contaminated lubricating oil and also for the lubricating oil to fill the oil cavities where the bevel gears, bearings and oil seals are located, and can ensure the lubrication effect on the bevel gears, bearings and oil seals.

[0018] Lithium-based grease is used in the oil cavity.

[0019] Furthermore, the connection of the through hole and the oil cavity can also be used for exhausting the oil cavity. After the oil cavity is exhausted or drained, the plug is threadedly connected to the main housing.

[0020] The beneficial effect of adopting the above further solution is that when the elbow gearbox is working, the heat generated by the gear meshing between the bevel gears will also increase the internal pressure of the elbow gearbox, and the exhaust can also be carried out through the through hole. The oil can be drained and the exhaust can be carried out regularly through the through hole, and after the discharge is completed, it can be sealed by the plug.

[0021] Furthermore, a connecting stop is also provided at the input port of the main housing for connecting with the barrel seat of the grain unloading tube.

[0022] The beneficial effect of adopting the above further solution is that the connecting stop of the main housing is connected with the barrel seat of the grain unloading tube, and a small clearance fit is adopted, which can effectively prevent the leakage of grain and the noise generated by the vibration of parts, so that the elbow gearbox is not easy to fall off after being assembled with the grain unloading tube.

[0023] Furthermore, an observation window is provided on the main housing.

[0024] Furthermore, the observation window includes a first observation port and a second observation port. The first observation port is horizontally arranged on the main housing, and the second observation port is vertically arranged on the main housing.

[0025] The beneficial effect of adopting the above further solution is that on the one hand, the situation of the grain can be observed through the observation window when the work is stopped, and on the other hand, when the elbow gearbox is blocked due to reasons such as dampness of the grain, the blocked grain can be cleaned through the observation window, so that the elbow gearbox can continue to work after being cleaned. Brief Description of the Drawings

[0026] Figure 1 is a schematic structural view of the present utility model;

[0027] Figure 2 is a front view structural schematic diagram of the present utility model;

[0028] Figure 3 is Figure 2 a sectional structural schematic diagram along the A-A direction in

[0029] Figure 4 is a left view structural schematic diagram of the present utility model;

[0030] In the figure, 1. main box housing; 2. input shaft; 3. input oil seal; 4. first input bearing; 5. input bevel gear; 6. oil injection channel; 7. oil injection nozzle; 8. plug; 9. second input bearing; 10. connecting oil channel; 11. output bevel gear; 12. bearing flange; 13. output bearing; 14. output oil seal; 15. output shaft; 16. first observation port; 17. second observation port; 18. connecting spigot; 19. input port; 20. output port; 21. retaining ring. Detailed Description of the Preferred Embodiment

[0031] The principles and features of the present utility model will be described below in conjunction with examples. The examples given are only for explaining the present utility model and are not intended to limit the scope of the present utility model.

[0032] As Figures 1-4 shown, a new elbow gearbox structure includes a main box housing 1 and a gear transmission mechanism arranged inside the main box housing 1. An input port 19 and an output port 20 are provided on the main box housing 1. The gear transmission mechanism includes an input shaft 2, an input bevel gear 5, an output shaft 15 and an output bevel gear 11. The input shaft 2 is rotatably arranged on the main box housing 1. The input bevel gear 5 is arranged on the input shaft 2. The output bevel gear 11 meshes with the input bevel gear 5. The output shaft 15 is rotatably arranged on the main box housing 1. The output bevel gear 11 is arranged on the output shaft 15. An oil cavity is provided inside the main box housing 1. An oil injection nozzle 7 and a through hole are provided on the main box housing 1. The oil injection nozzle 7 injects oil into one side of the oil cavity through an oil injection channel 6. The through hole is provided on the other side of the oil cavity and is communicated with the oil cavity. The through hole can drain oil from the oil cavity. A plug 8 is provided on the through hole.

[0033] The input shaft 2 is arranged on the main case housing 1 through a first input bearing 4 and a second input bearing 9. The first input bearing 4 and the second input bearing 9 are respectively located on both sides of the input bevel gear 5. The input shaft 2 is longer than the output shaft 15. By using two input bearings for rotational support, not only the support strength is improved, but also the support stability is further enhanced, making the transmission power between the bevel gears more stable and the noise lower.

[0034] An input oil seal 3 is also provided between the input shaft 2 and the main case housing 1. The input oil seal 3 is arranged outside the first input bearing 4. The input oil seal 3 can seal the input end side of the input shaft 2.

[0035] The output shaft 15 is arranged in the main case housing 1 through an output bearing 13. In the main case housing 1, there are a bearing rib 12 and a snap ring groove for positioning the snap ring 21. The lower end face of the output bearing 13 is positioned by the bearing rib 12, and the upper end face is positioned by the snap ring 21. The output shaft 15 is relatively short, and the number of output bearings 13 does not have to be specified. For example, one output bearing 13 can be used. The upper part of the output shaft 15 is positioned by the snap ring 21, and the lower part is positioned by the bearing rib 12, which can firmly fix and stably position the output shaft 15, avoiding the situation of the output shaft 15 moving up and down or being forced out.

[0036] An output oil seal 14 is provided between the output shaft 15 and the main case housing 1. The output oil seal 14 is arranged outside the output bearing 13. The output oil seal 14 can seal the output end side of the output shaft 15.

[0037] At least one communication oil passage 10 is also provided in the main case housing 1 for communicating the oil cavities on both sides of the second input bearing 9. The through hole is arranged on the inner end side of the input shaft 2 and outside the second input bearing 9 at the inner end. In order to ensure the smooth communication of the oil cavities on both sides of the second input bearing 9, there should be at least one communication oil passage 10 on the housing for positioning the second input bearing 9 in the main case housing 1, which is beneficial to the discharge of contaminated lubricating oil and also beneficial to the lubricating oil filling the oil cavities where the bevel gears, bearings and oil seals are located, and can ensure the lubrication effect on the bevel gears, bearings and oil seals.

[0038] The communication between the through hole and the oil cavity can also be used for exhausting the oil cavity. After the oil cavity exhausts or drains oil, the plug 8 is threadedly connected to the main case housing 1. When the elbow gearbox works, the heat generated by the gear meshing between the bevel gears will also increase the internal pressure of the elbow gearbox, and it can also be exhausted through the through hole. The oil can be drained and exhausted regularly through the through hole, and after the discharge is completed, it is sealed with the plug 8.

[0039] At the input port 19 of the main box housing 1, there is also a connecting stop 18 for connecting with the barrel base of the grain unloading tube. The connecting stop 18 of the main box housing 1 is connected with the barrel base of the grain unloading tube, adopting a small clearance fit, which can effectively prevent grain leakage and the noise generated by the vibration of parts, so that the elbow gearbox is not easy to fall off after being assembled with the grain unloading tube.

[0040] An observation window is provided on the main box housing 1. The observation window includes a first observation port 16 and a second observation port 17. The first observation port 16 is horizontally arranged on the main box housing 1, and the second observation port 17 is vertically arranged on the main box housing 1. On the one hand, the situation of the grain can be observed through the observation window when the work stops. On the other hand, when the elbow gearbox is blocked due to reasons such as dampness of the grain, the blocked grain can be cleaned through the observation window, so that the elbow gearbox can continue to work after cleaning.

[0041] The lubricating oil in the oil cavity of the elbow gearbox can be lithium-based grease. To solve the problem that the lithium-based grease is affected by pollutants and affects the part life, when the elbow gearbox structure is maintained after being used for a certain time, a grease gun can be used to inject lithium-based grease through the grease injection nozzle 7. The lithium-based grease enters the interior of the elbow gearbox through the grease injection oil passage 6. With the injection of the new lithium-based lubricating oil, the new lithium-based lubricating oil squeezes out the used lithium-based grease with pollutants from the elbow gearbox. The contaminated lithium-based grease moves towards the through hole direction and is discharged through the through hole; both the input bearing and the output bearing 13 can adopt ball bearings. In addition, heat is generated during the meshing of the bevel gears in the elbow gearbox, which will increase the pressure in the gearbox. The through hole not only plays the role of exhausting air, but also plays the role of discharging the lithium-based grease with pollutants. The elbow gearbox of the present invention can be applied to the grain unloading system of the harvester, its support strength is greatly improved, the lubrication performance is more excellent, and it solves the problems of short part service life, tooth breakage, bearing sintering, oil seal damage and oil leakage caused by the vibration of the existing elbow gearbox and poor cleanliness of the internal lithium-based grease, greatly improves the product performance, reduces the use cost and maintenance cost, and improves the competitiveness of the product.

[0042] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A new elbow gear box structure, characterized in that: The invention comprises a main case housing (1) and a gear transmission mechanism arranged in the main case housing (1); the main case housing (1) is provided with an input port (19) and an output port (20); the gear transmission mechanism comprises an input shaft (2), an input bevel gear (5), an output shaft (15) and an output bevel gear (11); the input shaft (2) is rotatably arranged on the main case housing (1); the input bevel gear (5) is arranged on the input shaft (2); the output bevel gear (11) is rotatably arranged on the input bevel gear (5); and the output bevel gear (11) is rotatably arranged on the input bevel gear (5). ) are meshed, the output shaft (15) is rotatably arranged on the main box housing (1), and the output bevel gear (11) is arranged on the output shaft (15); an oil chamber is arranged in the main box housing (1), and an oil injection nozzle (7) and a through hole are arranged on the main box housing (1); the oil injection nozzle (7) leads to one side of the oil chamber through an oil injection oil passage (6), and the through hole is arranged on the other side of the oil chamber and communicates with the oil chamber, and the through hole can be used for draining oil from the oil chamber, and a plug (8) is provided on the through hole.

2. The new elbow gear box structure according to claim 1 is characterized in that: The input shaft (2) is arranged on the main box housing (1) via a first input bearing (4) and a second input bearing (9); the first input bearing (4) and the second input bearing (9) are respectively located on both sides of the input bevel gear (5).

3. The new elbow gear box structure according to claim 2 is characterized in that: An input oil seal (3) is also provided between the input shaft (2) and the main box housing (1), and the input oil seal (3) is arranged on the outside of the first input bearing (4).

4. The new elbow gear box structure according to claim 1 is characterized in that: The output shaft (15) is arranged in the main box housing (1) via an output bearing (13); a bearing rib (12) and a retaining ring groove for positioning a retaining ring (21) are provided in the main box housing (1); the lower end face of the output bearing (13) is positioned by the bearing rib (12), and the upper end face is positioned by the retaining ring (21).

5. The new elbow gear box structure according to claim 4 is characterized in that: An output oil seal (14) is provided between the output shaft (15) and the main box housing (1), and the output oil seal (14) is arranged on the outside of the output bearing (13).

6. The new elbow gear box structure according to claim 2 is characterized in that: At least one connecting oil passage (10) is also provided in the main box housing (1) for connecting the oil chambers on both sides of the second input bearing (9).

7. The novel elbow gear box structure according to any one of claims 1 to 6, characterized in that: The through hole is connected to the oil chamber and can also be used to exhaust the oil chamber. After the oil chamber is exhausted or the oil is drained, the plug (8) is threadedly connected to the main box housing (1).

8. The novel elbow gear box structure according to any one of claims 1 to 6, characterized in that: The main box housing (1) is also provided at the input port (19) with a connection stop (18) for connecting to a barrel seat of a grain unloading barrel.

9. The novel elbow gear box structure according to any one of claims 1 to 6, characterized in that: The main box housing (1) is provided with an observation window.

10. The new elbow gear box structure according to claim 9 is characterized in that: The observation window comprises a first observation port (16) and a second observation port (17); the first observation port (16) is arranged horizontally on the main box shell (1); and the second observation port (17) is arranged vertically on the main box shell (1).

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