Inter-axle differential and gearbox

Abstract

The utility model provides an inter-axle differential mechanism and a gearbox, the inter-axle differential mechanism comprises a shell, a rotatable input shaft is arranged in the shell, one end of the input shaft is provided with a bevel gear shaft, and the axis of the input shaft coincides with the axis of the bevel gear shaft; a left bevel gear and a right bevel gear which are oppositely arranged are further arranged in the shell, and the bevel gear shaft is sleeved with the left bevel gear and the right bevel gear respectively. The inter-axle differential mechanism further comprises a planet shaft, the bevel gear shaft is sleeved with the planet shaft, planet teeth are arranged on the planet shaft, and the planet teeth are meshed with the left bevel gear and the right bevel gear respectively. According to the inter-axle differential of the structure, the input shaft transmits torque to the inter-axle differential, so that the inter-axle differential is driven to rotate, the driving bevel gear is driven to rotate, torque output is achieved, the problem that the rotating speeds of the rear drive input shaft, the six-drive output shaft and the driving bevel gear are inconsistent can be effectively solved, damage to any part can be effectively avoided, and the service life of the rear drive input shaft, the six-drive output shaft and the driving bevel gear is prolonged. And the overall service life of the gearbox is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of agricultural machinery, especially to an inter-axle differential and gearbox. BACKGROUND

[0002] In recent years, with the continuous development of economy and technology, various structures of agricultural machinery have been more and more widely used in agricultural production activities.

[0003] The gearbox, which includes a speed change transmission mechanism and a control mechanism, is an important component of agricultural machinery. Agricultural machinery, such as tractors, includes two-wheel drive, four-wheel drive, and six-wheel drive, and the corresponding gearbox structures also have significant differences. When the rotational speeds of the rear drive input shaft, the six-wheel drive output shaft, and the driving bevel gear are inconsistent during the operation of the six-wheel drive gearbox, the different speeds will cause the driving to be out of sync, resulting in damage to the relatively weak part of the transmission system. The most common failure is the broken gear. Alternatively, due to the production error of the tire, or the wear, load, and different tire pressure, the tire will slip and drag, causing severe wear of the tire.

[0004] In summary, how to provide an inter-axle differential that can effectively solve the inconsistency of the rotational speeds of the rear drive input shaft, the six-wheel drive output shaft, and the driving bevel gear, and also will not cause any component damage, and a gearbox including the inter-axle differential, has become a technical problem that needs to be solved by those skilled in the art. SUMMARY

[0005] The technical problem to be solved by the utility model is to provide an inter-axle differential that can effectively solve the inconsistency of the rotational speeds of the rear drive input shaft, the six-wheel drive output shaft, and the driving bevel gear, and also will not cause any component damage, and a gearbox including the inter-axle differential.

[0006] The utility model discloses a solution is realized as follows: the utility model provides an interaxle differential mechanism for gearbox, including the casing, the rotatable input shaft is equipped in the casing, the one end of input shaft is equipped with the bevel gear shaft, the axis of input shaft coincides with the bevel gear shaft, the opposite left bevel gear and right bevel gear are equipped in the casing still, the left bevel gear and right bevel gear are respectively set on the bevel gear shaft, the interaxle differential mechanism still includes planetary shaft, the planetary shaft is set on the bevel gear shaft, is equipped with the planet gear on the planetary shaft, the planet gear is engaged with left bevel gear and right bevel gear respectively.

[0007] Another technical scheme of the utility model lies in the above basis, the interaxle differential mechanism still includes left half casing and right half casing set in the casing, the left half casing and right half casing are oppositely arranged, and the end of the left half casing and the right half casing is detachably fixedly connected.

[0008] Another technical scheme of the utility model lies in the above basis, the corresponding position of the left half casing and the right half casing is respectively equipped with connecting hole, and the connecting hole is equipped with connecting piece for connection, and the connecting piece fixes and connects the left half casing and the right half casing together.

[0009] Another technical scheme of the utility model lies in the above basis, the planetary shaft includes first planetary shaft, and the planetary shaft also includes second planetary shaft, the second planetary shaft is arranged at one end of the first planetary shaft, and the axis of the first planetary shaft coincides with the second planetary shaft.

[0010] Another technical scheme of the utility model lies in the above basis, the interaxle differential mechanism also includes connecting ring, the connecting ring is set on the bevel gear shaft, one end of the first planetary shaft is connected with one end of the connecting ring, and one end of the second planetary shaft is connected with the other end of the connecting ring.

[0011] Another technical scheme of the utility model lies in the above basis, one end of the first planetary shaft away from the second planetary shaft is fixedly connected with the left half casing and the right half casing, and one end of the second planetary shaft away from the first planetary shaft is fixedly connected with the left half casing and the right half casing.

[0012] Another technical solution of this utility model is that, based on the above, the inter-shaft differential further includes a cover plate, the cover plate is placed at one end of the housing, a fourth bearing is sleeved on the left half of the housing, the cover plate is sleeved on the fourth bearing, a third bearing is sleeved on the right half of the housing, and the housing is sleeved on the third bearing; a flange is fixedly provided at the end of the input shaft away from the bevel gear shaft, a sealing element is provided on the flange, and the end of the cover plate away from the housing is sleeved on the sealing element.

[0013] Another technical solution of this utility model is that, based on the above, a second bearing and a sixth bearing are sleeved on the bevel gear shaft, a spacer is provided between the second bearing and the sixth bearing, and a double tooth is sleeved on the spacer.

[0014] In addition, this utility model also proposes a gearbox, including a housing and an inter-axle differential disposed on one side of the housing, wherein the inter-axle differential is the inter-axle differential as described above. Attached Figure Description

[0015] 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.

[0016] Figure 1 This is a schematic diagram of the structure of an inter-shaft differential according to the present invention.

[0017] The correspondence between the reference numerals in the attached figures is as follows:

[0018] 1. Active bevel gear; 2. Bearing housing; 3. First bearing.

[0019] 4 Nut 5 Double Tooth 6 Second Bearing

[0020] 7 Third bearing 8 Spacer 9 Housing

[0021] 10 Bevel gear shaft 11 Fourth bearing 12 Cover plate

[0022] 13 Copper sleeve 14 Input shaft 15 Flange

[0023] 16 Sealing ring 17 Fifth bearing 18 Left half shell

[0024] 19 Left bevel tooth; 20 First planetary tooth; 21 First planetary shaft

[0025] 22 Right half shell 23 Right bevel tooth 24 Bolt

[0026] 25 Second planetary shaft 26 Sixth bearing 27 Output gear

[0027] 28 Second planetary gear 29 Connecting ring 30 Sixth drive output shaft Detailed Implementation

[0028] 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.

[0029] The embodiments of this utility model are as follows, please refer to them. Figure 1 The inter-axle differential shown is used in a gearbox and specifically includes a housing 9. A rotatable input shaft 14 is housed within the housing 9. One end of the input shaft 14, shown as the right end in the figure, is equipped with a bevel gear shaft 10. The axes of the input shaft 14 and the bevel gear shaft 10 coincide, and a copper sleeve 13 is provided between the input shaft 14 and the bevel gear shaft 10. The bevel gear shaft 10 also has a driving bevel gear 1. The housing 9 also contains a left bevel gear 19 and a right bevel gear 23 arranged opposite to each other, which are respectively fitted onto the bevel gear shaft 10. The inter-axle differential also includes a planetary shaft, which is fitted onto the bevel gear shaft 10 and has planetary teeth that mesh with the left bevel gear 19 and the right bevel gear 23, respectively. In this type of inter-axle differential, the input shaft 14 transmits torque to the inter-axle differential, thereby driving the inter-axle differential to rotate, which in turn drives the active bevel gear to rotate, thus realizing the output of torque. It can effectively solve the problem of inconsistent speeds among the rear drive input shaft 14, the six-wheel drive output shaft 30, and the active bevel gear, effectively avoiding damage to any components and extending the overall service life of the transmission.

[0030] Based on the above embodiments, in another embodiment of the present invention, such as Figure 1 As shown, the inter-shaft differential also includes a left half-shell 18 and a right half-shell 22 disposed within the housing 9. The left half-shell 18 and the right half-shell 22 are disposed opposite to each other. The ends of the left half-shell 18 and the right half-shell 22, i.e., the upper end or the lower end, or the upper end and the lower end, are detachably fixedly connected. The left bevel gear 19 and the right bevel gear 23 are disposed within the left half-shell 18 and the right half-shell 22.

[0031] Based on the above embodiments, in another embodiment of the present invention, such as Figure 1 As shown, corresponding positions of the left half-shell 18 and the right half-shell 22 are provided with connecting holes, and connecting parts are provided in the connecting holes to fix the left half-shell 18 and the right half-shell 22 together. For the connecting holes, threaded holes are preferred, and for the connecting parts, bolts 24 are preferred.

[0032] Based on the above embodiments, in another embodiment of the present invention, such as Figure 1As shown, the planetary axis preferably includes a first planetary axis 21. The planetary axis also includes a second planetary axis 25, which is disposed at one end of the first planetary axis 21, i.e., the lower end shown in the figure, and the axes of the first planetary axis 21 and the second planetary axis 25 coincide.

[0033] Based on the above embodiments, in another embodiment of the present invention, such as Figure 1 As shown, the inter-shaft differential also includes a connecting ring 29, which is sleeved on the bevel gear shaft 10. One end of the first planetary shaft 21 (the lower end shown in the figure) is connected to one end of the connecting ring 29 (the upper end shown in the figure), and one end of the second planetary shaft 25 (the lower end shown in the figure) is connected to the other end of the connecting ring 29 (the lower end shown in the figure). It should be noted that the first planetary shaft 21, the connecting ring 29, and the second planetary shaft 25 can also be a one-piece structure, manufactured by casting or other methods.

[0034] Based on the above embodiments, in another embodiment of the present invention, such as Figure 1 As shown, the end of the first planetary axis 21 facing away from the second planetary axis 25, i.e., the upper end shown in the figure, is fixedly connected to the left half-shell 18 and the right half-shell 22. The end of the second planetary axis 25 facing away from the first planetary axis 21, i.e., the lower end shown in the figure, is fixedly connected to the left half-shell 18 and the right half-shell 22. More specifically, it is preferable to provide two fixed shafts between the left half-shell 18 and the right half-shell 22, with the two fixed shafts respectively located at the upper and lower ends shown in the figure. The upper end of the first planetary axis 21 and the lower end of the second planetary axis 25 are respectively fixedly connected to the two fixed shafts.

[0035] Based on the above embodiments, in another embodiment of the present invention, such as Figure 1 As shown, the inter-shaft differential also includes a cover plate 12, which is located at one end of the housing 9, i.e., the left end shown in the figure. A fourth bearing 11 is fitted on the left half of the housing 18, and the cover plate 12 is fitted on the fourth bearing 11 and can rotate relative to the cover plate 12. A third bearing 7 is fitted on the right half of the housing 22, and the housing 9 is fitted on the third bearing 7. The end of the input shaft 14 away from the bevel gear shaft 10, i.e., the left end shown in the figure, is also provided with a fixed flange 15. A seal is provided on the flange 15, and the cover plate 12 is fitted on the seal at the end away from the housing 9, i.e., the left end shown in the figure. For the seal, an O-ring seal 16 is preferred. Similarly, a third bearing 7 is also fitted on the right half of the shaft, and the housing 9 is fitted around the third bearing 7 and can rotate relative to the third bearing 7. For both the third bearing 7 and the fourth bearing 11, deep groove ball bearings are preferred.

[0036] Based on the above embodiments, in another embodiment of the present invention, such as Figure 1As shown, a spacer 8 is provided between the second bearing 6 and the sixth bearing 26 on the bevel gear shaft 10, and a double tooth 5 is also fitted on the spacer 8. The second bearing 6 and the sixth bearing 26 are preferably needle roller bearings. Furthermore, a fifth bearing 17 is provided on the input shaft 14, located between the left half-shell 18 and the seal. The inner wall of the cover plate 12 is fitted onto the fifth bearing 17 and can rotate on it. The fifth bearing 17 is also preferably a deep groove ball bearing. In addition, a first bearing 3 is provided at the right end of the bevel gear shaft 10. There are two first bearings 3, both fitted onto the bevel gear shaft 10. The first bearings 3 are preferably tapered bearings. A nut 4 for fixing is provided on the left side of the first bearing 3, and a bearing seat 2 is provided around the first bearing 3.

[0037] In this type of inter-shaft differential, the input shaft 14 transmits torque to the inter-shaft differential, causing it to rotate. Simultaneously, it drives the active bevel gear and the double gear 5 to rotate, thus outputting torque. Under the action of the inter-shaft differential, the problem of inconsistent rotation speeds among the input shaft 14, the six-wheel drive output shaft 30, and the active bevel gear can be effectively solved, thus effectively preventing damage to any components and extending the overall service life of the transmission.

[0038] In addition, this utility model also proposes a gearbox, including a housing and an output shaft 30 disposed in the housing. The output shaft is provided with an output tooth 27, which meshes with a double tooth 5 on a bevel gear shaft 10. On one side of the housing, i.e. the left side shown in the figure, there is also an inter-axle differential, which is the inter-axle differential as described above.

[0039] The gearbox with this structure, correspondingly, has the advantages of the aforementioned inter-shaft differential.

[0040] 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. An inter-axle differential for use in a gearbox, characterized in that, The device includes a housing, within which a rotatable input shaft is provided. One end of the input shaft is provided with a bevel gear shaft, and the axis of the input shaft coincides with that of the bevel gear shaft. The housing is also provided with a left bevel tooth and a right bevel tooth arranged opposite to each other, and the left bevel tooth and the right bevel tooth are respectively sleeved on the bevel tooth shaft; The inter-shaft differential also includes a planetary shaft, which is sleeved on the bevel gear shaft. The planetary shaft is provided with planetary teeth, which mesh with the left bevel gear and the right bevel gear respectively.

2. The inter-shaft differential according to claim 1, characterized in that, The inter-shaft differential also includes a left half-shell and a right half-shell disposed within the housing. The left half-shell and the right half-shell are disposed opposite to each other, and their ends are detachably fixedly connected. The left bevel gear and the right bevel gear are disposed within the left half-shell and the right half-shell.

3. The inter-shaft differential according to claim 2, characterized in that, The left and right halves of the shell are respectively provided with connecting holes, and the connecting holes are provided with connecting members to fix the left and right halves of the shell together.

4. The inter-shaft differential according to claim 3, characterized in that, The planetary axis includes a first planetary axis and a second planetary axis, which is disposed at one end of the first planetary axis, and the axes of the first planetary axis and the second planetary axis coincide.

5. The inter-shaft differential according to claim 4, characterized in that, The inter-shaft differential also includes a connecting ring, which is sleeved on the bevel gear shaft. One end of the first planetary shaft is connected to one end of the connecting ring, and one end of the second planetary shaft is connected to the other end of the connecting ring.

6. The inter-shaft differential according to claim 5, characterized in that, The end of the first planetary axis opposite to the second planetary axis is fixedly connected to the left and right half-shells, and the end of the second planetary axis opposite to the first planetary axis is fixedly connected to the left and right half-shells.

7. The inter-shaft differential according to claim 6, characterized in that, The inter-shaft differential also includes a cover plate, which is placed at one end of the housing. A fourth bearing is fitted on the left half of the housing, and the cover plate is fitted on the fourth bearing. A third bearing is fitted on the right half of the housing, and the housing is fitted on the third bearing. The input shaft has a fixed flange at the end opposite to the bevel gear shaft, and a sealing element is provided on the flange. The end of the cover plate opposite to the housing is sleeved on the sealing element.

8. The inter-shaft differential according to claim 7, characterized in that, The bevel gear shaft is fitted with a second bearing and a sixth bearing, and a spacer is provided between the second bearing and the sixth bearing. The spacer is also fitted with a double tooth.

9. A gearbox, comprising a housing and an inter-shaft differential disposed on one side of the housing, characterized in that, The inter-axle differential is the inter-axle differential as described in any one of claims 1 to 8.

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