Power output transmission device and tractor

Abstract

The utility model relates to a power output transmission device and a tractor, and relates to the field of tractor transmission systems, a PTO driving gear is rotatably installed on a power input shaft, a clutch is fixedly connected with the power input shaft and is connected with or separated from the PTO driving gear, and a PTO driven gear is fixedly connected with an intermediate shaft and is in meshing transmission with the PTO driving gear. The driven gear is rotationally installed on the middle shaft, the meshing sleeve is installed on the middle shaft and is connected with or separated from the driven gear, the output gear is fixedly connected with the power output shaft, and the output gear is in meshing transmission with the driven gear. The three-shaft transmission device has the advantages that the power input shaft, the middle shaft and the power output shaft are adopted for transmission, compared with two-shaft transmission, the size of a driven gear can be reduced, the weight of a single gear is small, assembling is convenient, the assembling efficiency is improved, and occupied space is reduced. When the pinion rotates, less oil foam is brought, and the transmission resistance is small.

Description

Technical Field

[0001] This utility model relates to the field of tractor transmission systems, specifically to a power output transmission device and a tractor. Background Technology

[0002] For most tractor models, the power output transmission mechanism generally uses two pairs of gears on the power input shaft and power output shaft. However, due to structural limitations, some tractors have very large driven gears, making assembly difficult and costly. Utility Model Content

[0003] The technical problem to be solved by this utility model is how to provide a new transmission device that reduces the size of a single gear and reduces assembly difficulty.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A power output transmission device includes a power input shaft, a clutch, a PTO drive gear, an intermediate shaft, a PTO driven gear, a meshing sleeve, a driven gear, an output gear, and a power output shaft. The PTO drive gear is rotatably mounted on the power input shaft. The clutch is fixedly connected to the power input shaft and engages or disengages with the PTO drive gear. The PTO driven gear is fixedly connected to the intermediate shaft and meshes with the PTO drive gear for transmission. The driven gear is rotatably mounted on the intermediate shaft. The meshing sleeve is mounted on the intermediate shaft and engages or disengages with the driven gear. The output gear is fixedly connected to the power output shaft and meshes with the driven gear for transmission.

[0005] The beneficial effects of this utility model are as follows: This solution uses a three-shaft drive system—a power input shaft, an intermediate shaft, and a power output shaft—which, compared to a two-shaft drive system, reduces the size of the driven gear, makes each gear lighter, facilitates assembly, improves assembly efficiency, and reduces space occupation. Furthermore, the pinion generates less oil slick when rotating, resulting in lower transmission resistance.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, there are at least two of each of the driven gears and the output gears, and the at least two driven gears and the at least two output gears are meshed and driven in a one-to-one correspondence. The meshing sleeve engages with one of the driven gears or disengages from all of the driven gears.

[0008] The beneficial effect of adopting the above-mentioned further solution is that by engaging the meshing sleeve with different output gears, the transmission ratio between the intermediate shaft and the power output shaft can be switched, thereby changing the speed of the power output shaft.

[0009] Furthermore, there are two of each of the driven gear and the output gear, and the meshing sleeve is located between the two driven gears.

[0010] Furthermore, the power output transmission device also includes a rear axle housing, in which the power input shaft, the intermediate shaft, and the power output shaft are all rotatably mounted.

[0011] Furthermore, the power output transmission device also includes a first input shaft bearing and a second input shaft bearing, which are respectively installed at both ends of the power input shaft.

[0012] Furthermore, both the first and second input shaft bearings are tapered roller bearings, and the first and second input shaft bearings are installed in the same direction.

[0013] The advantages of adopting the above-mentioned further solution are: the power input shaft is only subjected to unidirectional axial force, and the first and second input shaft bearings installed in the same direction can effectively withstand the unidirectional axial force, transferring the force to the bearing housing and other supporting structures, thus ensuring the stable operation of the shaft system. Using tapered roller bearings installed in the same direction simplifies the bearing installation structure, reducing the design and installation of complex axial positioning and fixing devices.

[0014] Furthermore, the power output transmission device also includes a first intermediate shaft bearing and a second intermediate shaft bearing, which are respectively installed at both ends of the intermediate shaft.

[0015] Furthermore, the power output transmission device also includes a first output shaft bearing and a second output shaft bearing, which are respectively installed at both ends of the power output shaft.

[0016] Furthermore, the first bearing and the second bearing of the intermediate shaft are installed back to back, and the first bearing and the second bearing of the output shaft are installed face to face.

[0017] The advantages of adopting the above-mentioned further scheme are: for the intermediate shaft, the two bearings on it are installed back to back, and this bearing configuration can provide greater rigidity; due to the large span of the force application point, it can effectively resist the overturning moment and maintain the stability of the intermediate shaft; when subjected to large radial force and a certain axial force, it can make the shaft system maintain good positional accuracy; in addition, the structure can also withstand axial loads acting in two directions.

[0018] For the power output shaft, the two bearings are mounted face to face, which can better distribute the load and enhance the bearing's ability to bear bidirectional axial loads; it can reduce the bearing's deflection and vibration amplitude, and improve the machine's working efficiency.

[0019] This utility model also provides a tractor, including the aforementioned power output transmission device. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a power output transmission device according to the present invention.

[0021] The attached diagram lists the components represented by each number as follows:

[0022] 1. Rear axle housing; 2. Power input shaft; 3. Input shaft first bearing; 4. Clutch; 5. PTO drive gear; 6. Input shaft second bearing; 7. Intermediate shaft; 8. Intermediate shaft first bearing; 9. PTO driven gear; 10. First driven gear; 11. Engaging sleeve; 12. Second driven gear; 13. Intermediate shaft second bearing; 14. Power output shaft; 15. First output gear; 16. Output shaft first bearing; 17. Second output gear; 18. Output shaft second bearing. Detailed Implementation

[0023] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0024] like Figure 1 As shown, this embodiment provides a power output transmission device, including a power input shaft 2, a clutch 4, a PTO drive gear 5, an intermediate shaft 7, a PTO driven gear 9, a meshing sleeve 11, a driven gear, an output gear, and a power output shaft 14. The PTO drive gear 5 is rotatably mounted on the power input shaft 2. The clutch 4 is fixedly connected to the power input shaft 2 and engages or disengages with the PTO drive gear 5. The PTO driven gear 9 is fixedly connected to the intermediate shaft 7 and meshes with the PTO drive gear 5 for transmission. The driven gear is rotatably mounted on the intermediate shaft 7. The meshing sleeve 11 is mounted on the intermediate shaft 7 and engages or disengages with the driven gear. The output gear is fixedly connected to the power output shaft 14 and meshes with the driven gear for transmission.

[0025] This design employs a three-shaft drive system: power input shaft 2, intermediate shaft 7, and power output shaft 14. Compared to a two-shaft drive system, this reduces the size of the driven gear, decreases the weight of individual gears, facilitates assembly, improves assembly efficiency, and reduces space occupation. Furthermore, the pinion generates less oil slick during rotation, resulting in lower transmission resistance.

[0026] Specifically, when clutch 4 engages with PTO drive gear 5, PTO drive gear 5 rotates synchronously with power input shaft 2 and transmits power to PTO driven gear 9; when clutch 4 disengages from PTO drive gear 5, PTO drive gear 5 does not rotate with power input shaft 2.

[0027] Based on the above technical solution, at least two passive gears and at least two output gears are provided, and the at least two passive gears and at least two output gears are meshed and driven in a one-to-one correspondence. The meshing sleeve 11 engages with one of the passive gears or separates from all the passive gears.

[0028] By engaging different output gears with the meshing sleeve 11, the transmission ratio between the intermediate shaft 7 and the power output shaft 14 can be switched, thereby changing the rotational speed of the power output shaft 14.

[0029] Specifically, the engagement sleeve 11 typically controls the engagement of one or two gears with the shaft. When there are three or more driven gears, the engagement sleeve 11 can be increased to two or more. For example, when there are three or four driven gears on the intermediate shaft 7, two engagement sleeves 11 are provided, one of which is located between two of the driven gears, and the other is located next to the remaining driven gear or between the remaining two driven gears.

[0030] Specifically, only one driven gear on the intermediate shaft 7 engages with the intermediate shaft 7 at any given time through the meshing sleeve 11, and the power of the intermediate shaft 7 is output to the power output shaft 14 through the driven gear and the output gear.

[0031] Based on the above technical solution, both the passive gear and the output gear are provided in twos, and the meshing sleeve 11 is located between the two passive gears.

[0032] Specifically, such as Figure 1 As shown, the two driven gears are designated as the first driven gear 10 and the second driven gear 12, respectively, and the two output gears are designated as the first output gear 15 and the second output gear 17, respectively. The first driven gear 10 meshes with the first output gear 15 for transmission, and the second driven gear 12 meshes with the second output gear 17 for transmission.

[0033] Based on the above technical solution, the power output transmission device also includes a rear axle housing 1, in which the power input shaft 2, the intermediate shaft 7 and the power output shaft 14 are all rotatably mounted.

[0034] Based on the above technical solution, the power output transmission device also includes a first input shaft bearing 3 and a second input shaft bearing 6, which are respectively installed at both ends of the power input shaft 2.

[0035] Specifically, the power input shaft 2 is rotatably mounted in the rear axle housing 1 via the first input shaft bearing 3 and the second input shaft bearing 6.

[0036] Based on the above technical solution, both the first input shaft bearing 3 and the second input shaft bearing 6 are tapered roller bearings, and the first input shaft bearing 3 and the second input shaft bearing 6 are installed in the same direction.

[0037] The power input shaft 2 is subjected to only unidirectional axial force. The first input shaft bearing 3 and the second input shaft bearing 6, which are installed in the same direction, can effectively withstand the unidirectional axial force and transfer the force to the bearing housing and other supporting structures, ensuring the stable operation of the shaft system. Using tapered roller bearings installed in the same direction can simplify the bearing installation structure and reduce the design and installation of complex axial positioning and fixing devices.

[0038] Specifically, Figure 1 The left end of the power input shaft 2 shown is the power input end, and the right end of the power output shaft 14 is the power output end.

[0039] Specifically, the first bearing 3 and the second bearing 6 of the input shaft are installed in the same direction, which means that the large ends of the two tapered roller bearings face the same end of the power input shaft 2.

[0040] Based on the above technical solution, the power output transmission device also includes a first intermediate shaft bearing 8 and a second intermediate shaft bearing 13, which are respectively installed at both ends of the intermediate shaft 7.

[0041] Specifically, the intermediate shaft 7 is rotatably mounted in the rear axle housing 1 via the intermediate shaft first bearing 8 and the intermediate shaft second bearing 13.

[0042] Based on the above technical solution, the power output transmission device also includes a first output shaft bearing 16 and a second output shaft bearing 18, which are respectively installed at both ends of the power output shaft 14.

[0043] Specifically, the power output shaft 14 is rotatably mounted in the rear axle housing 1 via the first output shaft bearing 16 and the second output shaft bearing 18.

[0044] Based on the above technical solution, the intermediate shaft first bearing 8 and the intermediate shaft second bearing 13 are installed back to back, and the output shaft first bearing 16 and the output shaft second bearing 18 are installed face to face.

[0045] For the intermediate shaft 7, the two bearings on it are installed back to back, and this bearing configuration can provide greater rigidity. Due to the large span of the force application point, it can effectively resist the overturning moment and maintain the stability of the intermediate shaft 7. When subjected to large radial force and a certain axial force, it can keep the shaft system in good positional accuracy. In addition, this structure can also withstand axial loads acting in two directions.

[0046] For the power output shaft 14, the two bearings on it are installed face to face, which can better distribute the load and enhance the bearing's ability to bear bidirectional axial loads; it can reduce the bearing's deflection and vibration amplitude and improve the machine's working efficiency.

[0047] This embodiment also provides a tractor, including the aforementioned power output transmission device.

[0048] In the description of this utility model, it should be noted that the terms "left", "right", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0050] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0051] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0052] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A power output transmission device, characterized in that, The assembly includes a power input shaft (2), a clutch (4), a PTO drive gear (5), an intermediate shaft (7), a PTO driven gear (9), a meshing sleeve (11), a driven gear, an output gear, and a power output shaft (14). The PTO drive gear (5) is rotatably mounted on the power input shaft (2). The clutch (4) is fixedly connected to the power input shaft (2) and engages or disengages with the PTO drive gear (5). The PTO driven gear (9) is fixedly connected to the intermediate shaft (7) and meshes with the PTO drive gear (5). The driven gear is rotatably mounted on the intermediate shaft (7). The meshing sleeve (11) is mounted on the intermediate shaft (7) and engages or disengages with the driven gear. The output gear is fixedly connected to the power output shaft (14) and meshes with the driven gear.

2. The power output transmission device according to claim 1, characterized in that, Both the passive gear and the output gear are provided in at least two, and the at least two passive gears and the at least two output gears are meshed and driven in a one-to-one correspondence. The meshing sleeve (11) engages with one of the passive gears or separates from all the passive gears.

3. The power output transmission device according to claim 2, characterized in that, Both the driven gear and the output gear are provided in twos, and the meshing sleeve (11) is located between the two driven gears.

4. The power output transmission device according to claim 1, characterized in that, It also includes a rear axle housing (1), in which the power input shaft (2), the intermediate shaft (7) and the power output shaft (14) are rotatably mounted.

5. A power output transmission device according to claim 4, characterized in that, It also includes a first input shaft bearing (3) and a second input shaft bearing (6), which are respectively installed at both ends of the power input shaft (2).

6. A power output transmission device according to claim 5, characterized in that, Both the first input shaft bearing (3) and the second input shaft bearing (6) are tapered roller bearings, and the first input shaft bearing (3) and the second input shaft bearing (6) are installed in the same direction.

7. A power output transmission device according to any one of claims 4-6, characterized in that, It also includes a first intermediate shaft bearing (8) and a second intermediate shaft bearing (13), which are respectively installed at both ends of the intermediate shaft (7).

8. A power output transmission device according to claim 7, characterized in that, It also includes a first output shaft bearing (16) and a second output shaft bearing (18), which are respectively installed at both ends of the power output shaft (14).

9. A power output transmission device according to claim 8, characterized in that, The intermediate shaft first bearing (8) and the intermediate shaft second bearing (13) are installed back to back, and the output shaft first bearing (16) and the output shaft second bearing (18) are installed face to face.

10. A tractor, characterized in that, Includes a power output transmission device as described in any one of claims 1-9.

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