Gearbox and agricultural machine

Abstract

The utility model provides a gearbox, which is used on agricultural machinery and comprises a box body, a rotatable spline shaft is arranged in the box body, a plurality of first bearings are arranged on the spline shaft, a bearing seat is sleeved on the first bearings, and a first sealing mechanism for sealing is arranged on the contact surface of the bearing seat and the box body; a flange is arranged at one end of the spline shaft, one end of the flange is arranged in the bearing seat, and a second sealing mechanism playing a role in sealing is arranged between the flange and the bearing seat. Compared with a gearbox with an existing structure, the gearbox with the structure has the advantages that the first sealing mechanism is arranged between the bearing seat and the box body, and the second sealing mechanism is arranged between the bearing seat and the flange, so that the sealing performance of the gearbox is better, and the leakage-proof function is stronger. Generally, the sealing device has the advantages of being simple and practical in structure, good in sealing performance and low in use cost. In addition, the utility model further provides an agricultural machine comprising the gearbox.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery, and in particular to a gearbox and agricultural machinery. Background Technology

[0002] In recent years, with the continuous acceleration of agricultural modernization, agricultural machinery of various structures, such as tractors, has been increasingly widely used in agricultural production.

[0003] The gearbox, as a core component of a vehicle's transmission system, is primarily used to regulate the engine's output speed and torque to adapt to the vehicle's power demands under different driving conditions. There are various types of gearboxes; however, gearboxes widely used in agricultural machinery present numerous problems. One prominent issue is oil leakage due to sealing issues. The causes of oil leakage are varied, including oil seal aging and deformation of the housing contact surfaces.

[0004] Therefore, how to provide a gearbox with a simple and practical structure, good sealing performance, and low operating cost, as well as agricultural machinery including such a gearbox, has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a gearbox with a simple and practical structure, good sealing performance, and low operating cost, as well as agricultural machinery including this gearbox.

[0006] The solution of this utility model is implemented as follows: This utility model proposes a gearbox for use in agricultural machinery, including a housing. A rotatable splined shaft is provided inside the housing. Several first bearings are mounted on the splined shaft, and bearing seats are fitted onto the first bearings. A first sealing mechanism for sealing is provided on the surface of the bearing seat in contact with the housing. A flange is provided at one end of the splined shaft, and one end of the flange is disposed within the bearing seat. A second sealing mechanism for sealing is provided between the flange and the bearing seat. Compared with existing gearboxes, this gearbox structure, by providing a first sealing mechanism between the bearing seat and the housing, and a second sealing mechanism between the bearing seat and the flange, achieves better sealing and stronger leak-proof function. Overall, it has the advantages of simple and practical structure, good sealing performance, and low operating cost.

[0007] Another technical solution of this utility model is that, based on the above, the end of the spline shaft is further provided with a fastener for fixing the flange to the spline shaft, and a third sealing mechanism for sealing is further provided between the fastener and the spline shaft.

[0008] Another technical solution of this utility model is that, based on the above, the first sealing mechanism includes a sealing groove formed on the bearing seat and a sealing ring disposed in the sealing groove.

[0009] Another technical solution of this utility model is that, based on the above, the second sealing mechanism includes a plurality of oil seals arranged in parallel, one end of which abuts against the bearing seat.

[0010] Another technical solution of this utility model is that, based on the above, the number of oil seals is two, and the two oil seals are sleeved on the end of the flange near the first bearing, and the fastener is a lock nut.

[0011] Another technical solution of this utility model is that, based on the above, the third sealing mechanism includes a sealing gasket, the sealing gasket is sleeved on the spline shaft, and one end of the sealing gasket abuts against one end of the flange.

[0012] Another technical solution of this utility model is that, based on the above, the first bearing is a tapered bearing, and there are two of them, with the two first bearings arranged side by side.

[0013] Another technical solution of this utility model is that, based on the above, the end of the first bearing away from the oil seal is also provided with a gear that plays a transmission role, and the gear is fixedly mounted on the spline shaft.

[0014] Another technical solution of this utility model is that, based on the above, a second bearing is provided at the end of the gear away from the first bearing, and the second bearing is a cylindrical roller bearing.

[0015] On the other hand, this utility model also proposes an agricultural machine, including a gearbox, which is the gearbox described above. Attached Figure Description

[0016] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0017] Figure 1 This is a schematic diagram of the structure of a gearbox according to the present invention.

[0018] 1. Housing 2. Bearing housing 3. Splined shaft

[0019] 4. Sealing rings 5. Oil seals 6. Flanges

[0020] 7. Sealing gasket; 8. Locking nut; 9. First bearing

[0021] 10 Second bearing 11 Gear Detailed Implementation

[0022] The present invention will now be described in detail with reference to the accompanying drawings. This description is merely illustrative and explanatory, and should not be construed as limiting the scope of protection of the present invention. Furthermore, those skilled in the art can combine the features in the embodiments described herein and in different embodiments according to the description in this document.

[0023] The embodiments of this utility model are as follows, please refer to them. Figure 1 The gearbox shown is used in agricultural machinery and includes a housing 1. Inside the housing 1 is a rotatable splined shaft 3. Several first bearings 9 are mounted on the splined shaft 3. Bearing seats 2 are fitted onto the first bearings 9. A first sealing mechanism, serving a sealing function, is provided on the surface of the bearing seat 2 that contacts the housing 1. Specifically, the first sealing mechanism is located between the outer periphery of the bearing seat 2 and the housing 1, and simultaneously contacts both the bearing seat 2 and the housing 1. A flange 6 is provided at one end of the splined shaft 3 (the left end shown in the figure), and the right end of the flange 6 is located inside the bearing seat 2. A second sealing mechanism, also serving a sealing function, is provided between the flange 6 and the bearing seat 2. Compared to existing gearboxes, this structure, by providing a first sealing mechanism between the bearing seat 2 and the housing 1, and a second sealing mechanism between the bearing seat 2 and the flange 6, achieves better sealing and stronger leak-proof performance. Overall, it has the advantages of simple and practical structure, good sealing performance, and low operating cost.

[0024] Based on the above embodiments, in another embodiment of the present invention, such as Figure 1 As shown, the end of the spline shaft 3, i.e. the left end shown in the figure, is also provided with a fastener for fixing the flange 6 to the left end of the spline shaft 3. A third sealing mechanism is also provided between the fastener and the spline shaft 3 to perform a sealing function.

[0025] Based on the above embodiments, in another embodiment of the present invention, such as Figure 1 As shown, Figure 1 As shown, the first sealing mechanism includes a sealing groove formed on the bearing housing 2 and a sealing ring 4 disposed within the sealing groove. The sealing groove can be circular or any other possible shape, and is not limited here.

[0026] Based on the above embodiments, in another embodiment of the present invention, such as Figure 1 As shown, the second sealing mechanism includes several oil seals 5 arranged in parallel. One end of the oil seal 5, i.e. the right end shown in the figure, abuts against the bearing housing 2, thereby playing a sealing role and preventing oil leakage from the bearing housing 2.

[0027] Based on the above embodiments, in another embodiment of the present invention, such as Figure 1As shown, there are two oil seals 5. The two oil seals 5 are fitted onto the flange 6 at the end near the first bearing 9, that is, the right end shown in the figure.

[0028] Based on the above embodiments, in another embodiment of the present invention, such as Figure 1 As shown, the third sealing mechanism includes a sealing gasket 7, which is fitted onto the left end of the splined shaft 3. One end of the sealing gasket 7, i.e., the right end shown in the figure, abuts against one end of the flange 6, i.e., the left end face of the flange 6 shown in the figure. For the fastener, a lock nut 8 is preferred.

[0029] Based on the above embodiments, in another embodiment of the present invention, such as Figure 1 As shown, the first bearing 9 is preferably a tapered bearing, and there are two of them, with the two first bearings 9 arranged side by side.

[0030] Based on the above embodiments, in another embodiment of the present invention, such as Figure 1 As shown, the first bearing 9 is located away from the oil seal 5 at the right end, which is also provided with a gear 11 that plays a transmission role. The gear 11 is fixedly mounted on the spline shaft 3. When the spline shaft 3 rotates, it drives the gear 11 to rotate together, thereby realizing the transmission of power.

[0031] Based on the above embodiments, in another embodiment of the present invention, such as Figure 1 As shown, the gear 11 is located away from the first bearing 9 at one end, i.e., the right end shown in the figure, and a second bearing 10 is also provided. The second bearing 10 is preferably a cylindrical roller bearing.

[0032] The gearbox with the above-described structure achieves better sealing and stronger leak-proof performance through three layers of sealing: a first sealing mechanism between the bearing housing 2 and the housing 1, a second sealing mechanism between the bearing housing 2 and the flange 6, and a third sealing mechanism at the left end of the splined shaft 3. Therefore, compared to existing gearbox structures, this design offers advantages such as simple and practical structure, better sealing, and lower operating costs.

[0033] Furthermore, this utility model also proposes an agricultural machine, including a gearbox, which is the gearbox described above. The agricultural machine can specifically be a tractor, etc., and is not limited thereto.

[0034] Agricultural machinery with this structure, correspondingly, possesses the advantages of the aforementioned gearboxes.

[0035] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A gearbox for use in agricultural machinery, characterized in that, The device includes a housing, which contains a rotatable splined shaft. The splined shaft has several first bearings, each bearing has a bearing seat, and the bearing seat has a first sealing mechanism that provides a sealing function on the surface that contacts the housing. One end of the splined shaft is provided with a flange, one end of which is located inside the bearing housing. A second sealing mechanism is provided between the flange and the bearing housing to provide a sealing function.

2. The gearbox according to claim 1, characterized in that, The end of the spline shaft is also provided with a fastener for fixing the flange to the spline shaft, and a third sealing mechanism for sealing is provided between the fastener and the spline shaft.

3. The gearbox according to claim 2, characterized in that, The first sealing mechanism includes a sealing groove formed on the bearing housing and a sealing ring disposed within the sealing groove.

4. The gearbox according to claim 3, characterized in that, The second sealing mechanism includes a plurality of oil seals arranged in parallel, one end of which abuts against the bearing housing.

5. The gearbox according to claim 4, characterized in that, The number of oil seals is two, and the two oil seals are sleeved on the flange at the end near the first bearing.

6. The gearbox according to claim 5, characterized in that, The third sealing mechanism includes a sealing gasket, which is sleeved on the splined shaft, with one end of the sealing gasket abutting against one end of the flange, and the fastener being a lock nut.

7. The gearbox according to claim 6, characterized in that, The first bearing is a tapered bearing, and there are two of them, which are arranged side by side.

8. The gearbox according to claim 7, characterized in that, The first bearing is provided with a gear at the end opposite to the oil seal, which serves as a transmission gear and is fixedly mounted on the spline shaft.

9. The gearbox according to claim 8, characterized in that, The gear is further provided with a second bearing at the end opposite to the first bearing, and the second bearing is a cylindrical roller bearing.

10. An agricultural machine, including a gearbox, characterized in that, The gearbox is the gearbox according to any one of claims 1 to 9.

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