Transmission system with overdrive gear, gearbox and tractor

Abstract

The utility model relates to the field of tractor transmission systems, in particular to a transmission system with an overdrive, a gearbox and a tractor, which comprises a power output shaft, an overdrive driving gear, a clutch, an overdrive driven gear and a variable speed output shaft. The overgear driven gear is fixedly connected with the variable speed output shaft, and the overgear driving gear is in meshing transmission with the overgear driven gear. The transmission system has the advantages that a set of overgear structure is added in the transmission system, the clutch can be connected when the tractor transports, the overgear driving gear is connected with the power output shaft and transmits power, and therefore the tractor is switched to the overgear, the overgear driving gear transmits power to the speed change output shaft through the overgear driven gear, and the speed change output shaft is driven to rotate. The variable-speed output shaft outputs power, the speed ratio is increased, the transportation speed of the tractor is increased, the fuel economy is improved, and the technical blank is filled.

Description

TECHNICAL FIELD

[0001] The utility model relates to tractor transmission system field, concretely relates to a transmission system with overspeed gear, gearbox and tractor. BACKGROUND

[0002] Tractor is usually equipped with only high speed gear, low speed gear, reverse gear and other conventional gear positions, and the running speed during transportation can reach 30-40km / h, which is relatively low. At present, there is no tractor with overspeed gear configuration, and the fuel economy of tractor is not good. SUMMARY

[0003] The utility model solves the technical problem of how to improve the speed of tractor during transportation.

[0004] The utility model discloses a transmission system with overspeed gear, including power output shaft, still including overspeed gear driving gear, clutch, overspeed gear driven gear and variable speed output shaft, the overspeed gear driving gear with power output shaft passes through the clutch and is connected, the overspeed gear driven gear with variable speed output shaft fixed connection, the overspeed gear driving gear with overspeed gear driven gear engages transmission.

[0005] The utility model has the advantages that a set of overspeed gear structure is added in the transmission system, the clutch can be engaged during tractor transportation, the overspeed gear driving gear is connected with the power output shaft and power is transmitted, so that the tractor is switched to the overspeed gear, the power output shaft is outputted by the power transmission of the overspeed gear driving gear through the overspeed gear driven gear, the speed ratio is improved, the transportation speed of tractor is improved, the fuel economy is improved, and the technical blank is filled.

[0006] On the basis of the above technical scheme, the utility model can also be improved as follows.

[0007] Further, the speed ratio of the overspeed gear driving gear and the overspeed gear driven gear is 0.31-0.57.

[0008] The beneficial effect of the above further scheme is that the transmission ratio of the overspeed gear driving gear and the overspeed gear driven gear is 0.31-0.57, so that the speed of tractor in the overspeed gear can be improved to 50Km / h or even higher, meeting the requirements of tractor on transportation speed.

[0009] Further, the speed ratio of the overspeed gear driving gear and the overspeed gear driven gear is 0.53.

[0010] Further, the overspeed gear driving gear is rotatably installed on the power output shaft through the first bearing, one end of the clutch is fixedly connected with the power output shaft, and the other end is engaged or separated from the overspeed gear driving gear.

[0011] The beneficial effect of the further scheme is that when the clutch is engaged with the overspeed gear driving gear, the overspeed gear driving gear is connected with the power output shaft and transmits power, and the tractor is switched to the overspeed gear; when the clutch is separated from the overspeed gear driving gear, the power transmission between the overspeed gear driving gear and the power output shaft is disconnected.

[0012] Further, the first bearing is a cylindrical roller bearing.

[0013] Further, the overspeed gear also comprises an idler gear and an idler gear shaft, the overspeed gear driving gear is in driving connection with the overspeed gear, and the overspeed gear is in driving connection with the overspeed gear driven gear.

[0014] The beneficial effect of the further scheme is that the overspeed gear driving gear and the overspeed gear driven gear are provided with the overspeed gear, the diameters of the single gears of the overspeed gear driving gear and the overspeed gear driven gear are reduced, the gear strength is increased, and the structural reliability is increased.

[0015] Further, the overspeed gear also comprises a second bearing, and the overspeed gear is rotatably installed on the idler gear shaft through the second bearing.

[0016] Further, the second bearing is a tapered roller bearing, and two second bearings are installed back to back.

[0017] The beneficial effect of the further scheme is that the two tapered roller bearings are installed back to back, the contact angle directions of the two bearings are opposite, the axial force is shared by the two bearings, and the stability of the bearing system is enhanced. The back-to-back installed bearings can simultaneously bear radial load, axial load and certain overturning moment, and have strong load bearing capacity.

[0018] The utility model also provides a gearbox, including the transmission system with overspeed gear of the band.

[0019] The utility model also provides a tractor, including the gearbox. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The utility model relates to a transmission system with overspeed gear.

[0021] In the drawings, the components represented by each reference numeral are listed as follows:

[0022] 1, power output shaft;2, first bearing;3, overspeed gear driving gear;4, clutch;5, overspeed gear;6, second bearing;7, overspeed gear driven gear;8, variable speed output shaft;9, idler gear shaft. DETAILED DESCRIPTION

[0023] The principles and characteristics of the present application are described below in conjunction with the accompanying drawings, which are provided only for explanation of the present application and are not intended to limit the scope of the present application.

[0024] As shown in the drawings, the present embodiment provides a transmission system with an overspeed gear, comprising a power output shaft 1, further comprising an overspeed gear driving gear 3, a clutch 4, an overspeed gear driven gear 7 and a variable speed output shaft 8, the overspeed gear driving gear 3 is connected with the power output shaft 1 through the clutch 4, the overspeed gear driven gear 7 is fixedly connected with the variable speed output shaft 8, the overspeed gear driving gear 3 is in meshing transmission with the overspeed gear driven gear 7. Figure 1

[0025] A set of overspeed gear structure is added in the transmission system, the clutch 4 can be engaged when the tractor is transporting, the overspeed gear driving gear 3 is connected with the power output shaft 1 and transmits power, so that the tractor is switched to the overspeed gear, the overspeed gear driving gear 3 transmits power to the variable speed output shaft 8 through the overspeed gear driven gear 7, the variable speed output shaft 8 outputs power, improves the speed ratio and improves the transport speed of the tractor, improves fuel economy and fills the technical gap.

[0026] Specifically, the transmission system with an overspeed gear further comprises a reverse gear set, a high-speed gear set, a low-speed gear set and the like. The newly added overspeed gear driving gear 3 and overspeed gear driven gear 7 and the like do not affect the operation of the original gear shifting structure.

[0027] Specifically, the clutch 4 can be any form of clutch, for example, the clutch 4 is an electromagnetic clutch. More specifically, the clutch 4 is a wet multi-plate electromagnetic clutch.

[0028] On the basis of the above technical solution, the speed ratio of the overspeed gear driving gear 3 to the overspeed gear driven gear 7 is 0.31-0.57.

[0029] The transmission ratio of the overspeed gear driving gear 3 to the overspeed gear driven gear 7 is 0.31-0.57, so that the speed of the tractor in the overspeed gear can be improved to 50Km / h or even higher, meeting the requirements of the tractor for transport speed.

[0030] On the basis of the above technical solution, the speed ratio of the overspeed gear driving gear 3 to the overspeed gear driven gear 7 is 0.53.

[0031] In one specific example, when the overspeed gear driving gear 3 and the overspeed gear driven gear 7 of the present embodiment are applied to a certain transmission with 48 forward gears, the overspeed gear driving gear 3 is installed on the original power output shaft 1 of the transmission, and the speed ratio change range of the power input shaft of the transmission to the variable speed output shaft 8 can reach 13.85-315.79.​

[0032] On the basis of the above technical solutions, the overspeed gear driving gear 3 is rotatably installed on the power output shaft 1 through the first bearing 2, one end of the clutch 4 is fixedly connected with the power output shaft 1, and the other end is engaged with or separated from the overspeed gear driving gear 3.

[0033] When the clutch 4 is engaged with the overspeed gear driving gear 3, the overspeed gear driving gear 3 is connected with the power output shaft 1 and transmits power, and the tractor is switched to the overspeed gear; when the clutch 4 is separated from the overspeed gear driving gear 3, the power transmission between the overspeed gear driving gear 3 and the power output shaft 1 is disconnected.

[0034] On the basis of the above technical solutions, the first bearing 2 is a cylindrical roller bearing.

[0035] Alternatively, the first bearing 2 is a ball bearing or other form of bearing.

[0036] On the basis of the above technical solutions, the overspeed gear idler 5 and the idler gear shaft 9 are further included, the overspeed gear idler 5 is rotatably installed on the idler gear shaft 9, the overspeed gear driving gear 3 is in driving connection with the overspeed gear idler 5, and the overspeed gear idler 5 is in driving connection with the overspeed gear driven gear 7.

[0037] The overspeed gear idler 5 is arranged between the overspeed gear driving gear 3 and the overspeed gear driven gear 7, the diameters of the overspeed gear driving gear 3 and the overspeed gear driven gear 7 are reduced, the strength of the gears is increased, and the structural reliability is increased.

[0038] On the basis of the above technical solutions, the second bearing 6 is further included, and the overspeed gear idler 5 is rotatably installed on the idler gear shaft 9 through the second bearing 6.

[0039] Optionally, the second bearing 6 is any form of bearing, such as a ball bearing, a cylindrical roller bearing, or a tapered roller bearing.

[0040] On the basis of the above technical solutions, the second bearing 6 is a tapered roller bearing, and two second bearings 6 are provided, and the two second bearings 6 are installed back to back.

[0041] The two tapered roller bearings are installed back to back, the contact angle directions of the two bearings are opposite, the axial force is shared by the two bearings together, and the stability of the bearing system is enhanced. The back-to-back installed bearings can simultaneously bear radial load, axial load, and certain overturning moment, and have strong load bearing capacity.

[0042] The embodiment also provides a gearbox including the transmission system with the overspeed gear.

[0043] The embodiment also provides a tractor including the gearbox.

[0044] In the description of the utility model, it needs to explain, the term "axial direction", "radial direction", "circumferential direction" and so on indicate the position relation based on the position relation shown in drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply the device or element indicated must have a particular orientation, construct and operate in a particular orientation, therefore cannot be understood as the limitation of the utility model.

[0045] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features.

[0046] In the utility model, unless otherwise expressly provided and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0047] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the specification and the characteristics of different embodiments or examples without contradiction.

[0048] In the description of the utility model, it needs to explain, unless otherwise expressly provided and limited, the terms "installation", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be directly connected, or indirectly connected through an intermediate medium, it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0049] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A driveline with an overdrive gear comprising a power output shaft (1), characterized in that, The overdrive driving gear (3) is connected with the power output shaft (1) through the clutch (4), the overdrive driven gear (7) is fixedly connected with the variable speed output shaft (8), and the overdrive driving gear (3) and the overdrive driven gear (7) are in meshing transmission.

2. A driveline with an overdrive gear according to claim 1, characterized in that, The rotation speed ratio of the overdrive driving gear (3) to the overdrive driven gear (7) is 0.31-0.

57.

3. A driveline with an overdrive gear according to claim 2, characterized in that, The rotation speed ratio of the overdrive driving gear (3) to the overdrive driven gear (7) is 0.

53.

4. A driveline with an overdrive gear according to claim 1, characterized in that, The overdrive driving gear (3) is rotatably installed on the power output shaft (1) through the first bearing (2), one end of the clutch (4) is fixedly connected with the power output shaft (1), and the other end is engaged with or separated from the overdrive driving gear (3).

5. A driveline with an overdrive gear according to claim 4, characterized in that, The first bearing (2) is a cylindrical roller bearing.

6. A driveline with an overdrive gear according to claim 1, characterized in that, The overdrive idler gear (5) is rotatably installed on the idler gear shaft (9), the overdrive driving gear (3) is in transmission connection with the overdrive idler gear (5), and the overdrive idler gear (5) is in transmission connection with the overdrive driven gear (7).

7. A driveline with an overdrive gear according to claim 6, characterized in that, The overdrive idler gear (5) is rotatably installed on the idler gear shaft (9) through the second bearing (6).

8. A driveline with an overdrive gear according to claim 7, characterized in that, The second bearing (6) is a tapered roller bearing, and two second bearings (6) are installed back to back.

9. A gearbox characterized in that, The transmission system with an overdrive as claimed in any one of claims 1-8.

10. A tractor characterised in that, The gearbox as claimed in claim 9.

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