Arrangement structure for achieving ground speed PTO and agricultural mechanical equipment

Abstract

The utility model relates to the technical field of agricultural machinery, in particular to an arrangement structure for achieving ground speed PTO and agricultural mechanical equipment. The arrangement structure comprises a ground speed input assembly, an engine input assembly, a synchronizer assembly and an output assembly. The ground speed input assembly comprises a coupling power input shaft and a transmission shaft, the coupling power input shaft is meshed with the outer diameter of the transmission shaft, the transmission shaft is a hollow pipe, and a cavity is formed in the transmission shaft; the output assembly is installed in a cavity of the transmission shaft, the transmission shaft and the ground speed input assembly are coaxially arranged, the synchronizer assembly is installed at the inner end of the engine input assembly, the inner end of the transmission shaft and the inner end of the output assembly, and the outer end of the output assembly is used for being connected with a PTO clutch. According to the utility model, the rotating speed of the PTO is selectively related to the rotating speed of the engine or the output vehicle speed, so that the requirements of different agricultural operations are met, and the operation efficiency and accuracy are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to agricultural machinery technical field especially relates to a kind of arrangement structure and agricultural machinery equipment for realizing ground speed PTO. BACKGROUND

[0002] PTO is generally designed on the rear end of rear axle on tractor, and PTO (Power Take-off) is a kind of power output device, which is widely used in agricultural machinery, such as rotary cultivator, baling machine, seeding machine, etc., to provide necessary power.

[0003] In the prior art, the power of PTO input shaft directly comes from engine, each gear has fixed transmission ratio relationship with engine speed, and PTO output speed can only be changed by selecting PTO gear, and PTO generally has 1-3 gears. For some special agricultural conditions, PTO speed needs to change with tractor speed, for example, seeding, fertilizing, etc. In the case of fluctuating vehicle speed, if PTO speed does not change, it will directly affect the seeding amount and fertilizing concentration. In addition, PTO speed has no fixed transmission ratio relationship with vehicle speed, and PTO speed cannot change in real time with vehicle speed in actual operation, which cannot meet the needs of special conditions. In addition, PTO input shaft is always connected with engine power, and PTO clutch often has the phenomenon of disconnecting power and rotating, which not only causes power loss, but also affects operation experience. SUMMARY

[0004] In view of the deficiencies in the prior art, the purpose of the embodiments of the utility model is to provide a kind of arrangement structure for realizing ground speed PTO, realize that PTO speed can be selected to be related to engine speed or related to output vehicle speed, so as to meet the needs of different agricultural operations and ensure operation efficiency and accuracy.

[0005] In order to achieve the above-mentioned purpose, the embodiments of the utility model provide the following technical solutions:

[0006] A kind of arrangement structure for realizing ground speed PTO, comprising: ground speed input assembly, engine input assembly, synchronizer assembly and output assembly;The ground speed input assembly includes coupling power input shaft and transmission shaft, the coupling power input shaft is engaged with the gear installed on the transmission shaft, and the transmission shaft is a hollow shaft with a cavity;The output assembly is installed in the cavity of the transmission shaft, the transmission shaft is coaxially arranged with the ground speed input assembly, the synchronizer assembly is installed on the inner end of engine input assembly, the inner end of transmission shaft and the inner end of output assembly, and the outer end of the output assembly is used to connect PTO clutch.

[0007] Optionally, the engine input assembly comprises an engine input shaft and a mesh sleeve, the mesh sleeve is sleeved on the end of the engine input shaft and is connected with the engine input shaft through spline.

[0008] Optionally, the arrangement further comprises a first bearing frame and a second bearing frame, the mesh sleeve is rotatably installed in the first bearing frame, and a first bearing is installed between the mesh sleeve and the first bearing frame, the transmission shaft is rotatably installed in the second bearing frame, and a second bearing is installed between the transmission shaft and the second bearing frame.

[0009] Optionally, the first bearing is a deep groove ball bearing, and the second bearing is a cylindrical roller bearing.

[0010] Optionally, the coupling power input shaft is also installed on the second bearing frame and is arranged in parallel with the transmission shaft, the end of the coupling power input shaft is provided with a helical gear, the transmission shaft is provided with a low gear and a high gear, a spacer sleeve is arranged between the low gear and the high gear, and the helical gear of the coupling power input shaft is engaged with the low gear.

[0011] Optionally, the coupling power input shaft is installed on the second bearing frame through a seventh bearing and an eighth bearing, the seventh bearing and the eighth bearing are both tapered roller bearings and are symmetrically installed on the coupling power input shaft.

[0012] Optionally, the output assembly comprises a connecting shaft and a PTO output shaft, the outer diameter of the connecting shaft is connected with the synchronizer assembly through spline, the end of the connecting shaft is connected with the inner end of the PTO output shaft through spline, and the outer end of the PTO output shaft is used for connecting a PTO clutch.

[0013] Optionally, one end of the connecting shaft is rotatably installed in the mesh sleeve through a fourth bearing, the other end of the connecting shaft is rotatably installed in the transmission shaft through a fifth bearing, and the outer end of the PTO output shaft is rotatably connected with the transmission shaft through a sixth bearing.

[0014] Optionally, the synchronizer assembly comprises a first synchronizing ring, a second synchronizing ring and an engaging sleeve, the first synchronizing ring is connected with the mesh sleeve, the second synchronizing ring is connected with the transmission shaft, and the engaging sleeve is connected with the connecting shaft; by pulling the puller, the connecting shaft is connected with the mesh sleeve through the engaging sleeve and the first synchronizing ring, or the connecting shaft is connected with the transmission shaft through the engaging sleeve and the second synchronizing ring.

[0015] The embodiment of the utility model further provides a kind of agricultural machinery equipment, comprising the arrangement of the realization ground speed PTO as described above.

[0016] The one or more technical solutions provided in the embodiment of the utility model have at least the following technical effects or advantages:

[0017] The arrangement structure connects the output assembly with the engine input assembly (engine input shaft) or the coupling power input shaft of the ground speed input assembly through the synchronizer assembly, can realize that the PTO rotation speed is selected to be related to the engine rotation speed or the output vehicle speed, meets the demand of different working conditions of the tractor on the PTO rotation speed, improves the farming effect, and increases the working condition adaptability of the power assembly and the tractor. Moreover, the arrangement structure can realize the cutting and combination of the PTO power, solves the phenomenon that the friction plate continues to combine due to the oil viscosity when the PTO clutch is connected to the disconnection command, causes the PTO output shaft to continue to rotate, reduces the power loss caused by the PTO clutch dragging, is beneficial to improving the working efficiency of the gearbox, and improves the operation experience.

[0018] The advantages of the additional aspects of the utility model will be given in the following description, some of which will become apparent from the following description, or be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0019] The description and drawings of the utility model constitute a part of the utility model, are used to provide further understanding of the utility model, and the illustrative embodiments of the utility model and the description thereof are used to explain the utility model, and do not constitute improper limitation on the utility model.

[0020] Figure 1 It is the arrangement structure schematic view provided by the utility model embodiment;

[0021] In the figure: 1, engine input shaft;2, meshing sleeve;3, first bearing;4, first bearing frame;5, synchronizer assembly;6, shift fork;7, second bearing;8, second bearing frame;9, low gear;10, spacer sleeve;11, high gear;12, third bearing;13, first lock nut;14, PTO output shaft;15, connecting shaft;16, fourth bearing;17, fifth bearing;18, sixth bearing;19, coupling power input shaft;20, second lock nut;21, seventh bearing;22, eighth bearing;23, transmission shaft;

[0022] The mutual distance or size is exaggerated for showing the position of each part, and the schematic view is only used for illustration. DETAILED DESCRIPTION

[0023] It should be noted that the following detailed description is all exemplary, and aims at providing further description of the utility model. Unless otherwise specified, all the technical and scientific terms used in the utility model have the same meaning as that understood by the ordinary skilled person in the technical field to which the utility model belongs. In addition, it should be understood that when the terms "contain" and / or "include" are used in the specification, they indicate that the features, steps, operations, devices, components and / or their combinations exist.

[0024] Terminology:

[0025] Ground speed PTO: A type of PTO whose output shaft speed is positively correlated with the walking vehicle speed.

[0026] To solve the technical problems mentioned in the background art, the embodiment proposes an arrangement structure for implementing ground speed PTO, which realizes the linear correlation between PTO speed and tractor driving speed, thereby improving the adaptability and efficiency of operation. At the same time, by preventing the PTO clutch from dragging, the power loss is reduced, and the efficiency of the overall transmission system is improved. Moreover, the arrangement structure is reasonable, the load is uniform, and the arrangement space is reduced.

[0027] As shown in Figure 1 , the arrangement structure for implementing ground speed PTO includes a ground speed input assembly, an engine input assembly, a synchronizer assembly 5, and an output assembly.

[0028] The ground speed input assembly includes a coupling power input shaft 19 and a transmission shaft 23, the coupling power input shaft 19 is engaged with the outer diameter of the transmission shaft 23, the transmission shaft 23 is a hollow shaft, and the transmission shaft 23 has a cavity inside. This structure enables the power to be effectively transmitted from the ground speed input assembly to the transmission shaft 23, and the hollow design of the transmission shaft 23 provides installation space for the output assembly.

[0029] The output assembly is installed in the cavity of the transmission shaft 23, and the transmission shaft 23 is coaxially arranged with the ground speed input assembly, ensuring the linearity and stability of power transmission. The synchronizer assembly 5 is installed on the inner end of the engine input assembly, the inner end of the transmission shaft 23, and the inner end of the output assembly, achieving precise synchronization between different assemblies and improving the coordination of the entire system. The outer end of the output assembly is used to connect the PTO clutch, thereby realizing the output of power.

[0030] The engine input assembly includes an engine input shaft 1 and an engagement sleeve 2, the engagement sleeve 2 is sleeved on the end of the engine input shaft 1 and is connected with the engine input shaft 1 through a spline. This connection ensures the firm connection between the engine input shaft 1 and the engagement sleeve 2, improving the reliability of the system.

[0031] The arrangement structure further includes a first bearing bracket 4 and a second bearing bracket 8, which are respectively used to support the engagement sleeve 2 and the transmission shaft 23. The engagement sleeve 2 is rotatably installed in the first bearing bracket 4, and the first bearing 3 is installed between the engagement sleeve 2 and the first bearing bracket 4. The transmission shaft 23 is rotatably installed in the second bearing bracket 8, and the second bearing 7 is installed between the transmission shaft 23 and the second bearing bracket 8. This design ensures the stable rotation of the engagement sleeve 2 and the transmission shaft 23, reducing friction and wear. Further, the outer end of the transmission shaft 23 is provided with a third bearing 12, and the outer side of the third bearing 12 is provided with a first locking nut 13.

[0032] Further, the first bearing 3 is a deep groove ball bearing, and the second bearing 7 is a cylindrical roller bearing. The deep groove ball bearing has good load capacity and high rotation speed, and is suitable for supporting the meshing sleeve 2; the cylindrical roller bearing has large radial load capacity, and is suitable for supporting the transmission shaft 23.

[0033] The coupling power input shaft 19 is also mounted on the second bearing bracket 8 and arranged in parallel with the transmission shaft 23. The end of the coupling power input shaft 19 has a helical gear, the low gear 9 and the high gear 11 are mounted on the transmission shaft 23, the spacer sleeve 10 is arranged between the low gear 9 and the high gear 11, and the helical gear of the coupling power input shaft 19 is engaged with the low gear 9. This design allows the coupling power input shaft 19 to engage with the gears on the transmission shaft 23 to achieve power transmission.

[0034] The coupling power input shaft 19 is mounted on the second bearing bracket 8 through the seventh bearing 21 and the eighth bearing 22, both of which are tapered roller bearings and are symmetrically mounted on the coupling power input shaft 19, and the second locking nut 20 is arranged on the left side of the seventh bearing 21. This design ensures stable rotation of the coupling power input shaft 19 and improves the reliability of the system.

[0035] The output assembly includes a connecting shaft 15 and a PTO output shaft 14, the outer diameter of the connecting shaft 15 is connected to the synchronizer assembly 5 through a spline, and the end of the connecting shaft 15 is connected to the inner end of the PTO output shaft 14 through a spline, and the outer end of the PTO output shaft 14 is used to connect the PTO clutch. This design allows the output assembly to be easily connected to the synchronizer assembly 5 and the PTO clutch, achieving power output.

[0036] One end of the connecting shaft 15 is rotatably mounted in the meshing sleeve 2 through the fourth bearing 16, the other end of the connecting shaft 15 is rotatably mounted in the transmission shaft 23 through the fifth bearing 17, the outer end of the PTO output shaft 14 is rotatably connected to the transmission shaft 23 through the sixth bearing 18, and the fourth bearing 16, the fifth bearing 17 and the sixth bearing 18 are needle bearings. This design ensures stable rotation of the connecting shaft 15 and the PTO output shaft 14, reducing friction and wear.

[0037] The synchronizer assembly 5 in this embodiment is a commercially available structure. Specifically, the synchronizer assembly 5 includes a first synchronizer ring (left side), a second synchronizer ring (right side), and a coupling sleeve (middle inner side). The first synchronizer ring is connected with the engagement sleeve 2, the second synchronizer ring is connected with the transmission shaft 23, and the coupling sleeve is connected with the connecting shaft 15. By pushing the yoke, the connecting shaft 15 can be connected with the engagement sleeve 2 through the coupling sleeve and the first synchronizer ring, or the connecting shaft 15 can be connected with the transmission shaft 23 through the coupling sleeve and the second synchronizer ring. The gear selection of the synchronizer assembly 5 can realize that the PTO rotation speed is selectively related to the engine rotation speed or the vehicle speed, or the PTO has no power output. By adding a synchronizer assembly 5 between the engine output shaft and the PTO input shaft, the problem of PTO dragging is solved, the power loss is reduced, and the work efficiency is improved.

[0038] The arrangement structure of this embodiment can realize the switching of the three modes of the PTO rotation speed, as follows:

[0039] The PTO rotation speed is directly related to the engine rotation speed: the engine input shaft 1 provides the rotation speed and the torque; under the pushing of the yoke 6, the synchronizer assembly 5 is connected with the engagement sleeve 2 through the spline, and at the same time, the synchronizer assembly 5 is always connected with the connecting shaft 15 through the spline; the connecting shaft 15 is connected with the PTO output shaft 14 through the spline; the PTO output shaft 14 transmits the torque to the PTO clutch to complete the power transmission.

[0040] In this state, the first bearing 3, the second bearing 7, the first bearing bracket 4, and the second bearing bracket 8 play a supporting role, and the fourth bearing 16, the fifth bearing 17, and the sixth bearing 18 reduce the installation space while bearing the radial load.

[0041] The PTO rotation speed is 0: the synchronizer assembly 5 is in the middle neutral position, and the PTO has no power and rotation speed output. In this state, the PTO dragging power and other useless work can be reduced to the maximum extent, which helps to improve the overall transmission efficiency of the transmission system.

[0042] The PTO rotation speed is related to the vehicle speed (front and rear axle rotation speed): the coupled power input shaft 19 provides power, which is divided into two parts. One part is transmitted to the tire through the spline on one side of the coupled power input shaft 19; the other part is transmitted to the low gear 9 through the helical gear on the coupled power input shaft 19. The low gear 9 is connected with the transmission shaft 23 through the spline; at this time, under the pushing of the yoke 6, the synchronizer assembly 5 is connected with the transmission shaft 23 through the spline, and at the same time, the synchronizer assembly 5 is always connected with the connecting shaft 15 through the spline; the connecting shaft 15 is connected with the PTO output shaft 14 through the spline; the PTO output shaft 14 transmits the torque to the PTO clutch to complete the power transmission. In this state, the wheel edge speed is associated with the PTO output speed through the coupled power input shaft 19, and the transmission ratio between them is fixed and can be calculated through the gear ratio. Therefore, the PTO output rotation speed is linearly related to the vehicle speed.

[0043] In this state, the first bearing 3, the second bearing 7, the first bearing frame 4 and the second bearing frame 8 bear the support function and mainly bear the radial force; the seventh bearing 21 and the eighth bearing 22 mainly bear the torque of the helical gear of the coupling power input shaft 19; the fourth bearing 16, the fifth bearing 17 and the sixth bearing 18 bear the radial load and reduce the installation space.

[0044] The structure realizes the function of the ground speed PTO by using a synchronizer assembly 5, a set of gear meshes, and a structure of coupling the power input shaft 19 and the ground speed low gear 9 in an integrated manner. The engine and the PTO clutch are on one shaft, and the synchronizer is connected in between. Fewer gear meshes are used between the engine and the PTO, fewer parts are used, and a more compact structure is used to realize the function of the ground speed PTO, which reduces the number of parts and the arrangement space and improves the transmission efficiency. The structure is compact, the use of parts is reduced, and the cost is reduced. Fewer parts and a more compact structure realize the function of the ground speed PTO, which is more suitable for small and compact tractors.

[0045] Based on the above arrangement structure, the embodiment of the utility model further provides an agricultural machinery equipment, such as a rotary cultivator, a baling machine, a seeding machine and the like. This design makes the agricultural machinery equipment can conveniently realize the function of the ground speed PTO, improves the performance and efficiency of the agricultural machinery equipment.

[0046] Although the specific embodiments of the utility model have been described in combination with the drawings, it is not a limitation on the protection scope of the utility model. Those skilled in the art should understand that various modifications or deformations made by the skilled in the art on the basis of the technical scheme of the utility model without creative labor are still within the protection scope of the utility model.

Claims

1. An arrangement structure for achieving ground speed PTO, characterized in that, include: Ground speed input assembly, engine input assembly, synchronizer assembly and output assembly; The ground speed input component includes a coupling power input shaft and a transmission shaft. The outer diameter of the coupling power input shaft meshes with that of the transmission shaft. The transmission shaft is a hollow shaft with a cavity inside. The output component is installed in the cavity of the drive shaft, which is coaxially arranged with the ground speed input component. The synchronizer assembly is installed on the inner end of the engine input component, the inner end of the drive shaft, and the inner end of the output component. The outer end of the output component is used to connect to the PTO clutch.

2. The arrangement structure for achieving ground speed PTO as described in claim 1, characterized in that, The engine input assembly includes an engine input shaft and a meshing sleeve, the meshing sleeve being fitted onto the end of the engine input shaft and connected to the engine input shaft via a spline.

3. The arrangement structure for achieving ground speed PTO as described in claim 2, characterized in that, The arrangement structure also includes a first bearing bracket and a second bearing bracket. The meshing sleeve is rotatably installed in the first bearing bracket, and a first bearing is installed between the meshing sleeve and the first bearing bracket. The drive shaft is rotatably installed in the second bearing bracket, and a second bearing is installed between the drive shaft and the second bearing bracket.

4. The arrangement structure for achieving ground speed PTO as described in claim 3, characterized in that, The first bearing is a deep groove ball bearing, and the second bearing is a cylindrical roller bearing.

5. The arrangement structure for achieving ground speed PTO as described in claim 3, characterized in that, The coupling power input shaft is also mounted on the second bearing bracket and arranged parallel to the transmission shaft. The end of the coupling power input shaft has a helical gear. The transmission shaft is equipped with a low-gear gear and a high-gear gear. A spacer is provided between the low-gear gear and the high-gear gear. The helical gear of the coupling power input shaft meshes with the low-gear gear.

6. The arrangement structure for achieving ground speed PTO as described in claim 5, characterized in that, The coupled power input shaft is mounted on the second bearing bracket via a seventh bearing and an eighth bearing. Both the seventh and eighth bearings are tapered roller bearings and are symmetrically mounted on the coupled power input shaft.

7. The arrangement structure for achieving ground speed PTO as described in claim 3, characterized in that, The output assembly includes a connecting shaft and a PTO output shaft. The outer diameter of the connecting shaft is connected to the synchronizer assembly via a spline, and the end of the connecting shaft is connected to the inner end of the PTO output shaft via a spline. The outer end of the PTO output shaft is used to connect to the PTO clutch.

8. The arrangement structure for achieving ground speed PTO as described in claim 7, characterized in that, One end of the connecting shaft is rotatably mounted in the meshing sleeve via a fourth bearing, and the other end of the connecting shaft is rotatably mounted in the drive shaft via a fifth bearing. The outer end of the PTO output shaft is rotatably connected to the drive shaft via a sixth bearing.

9. The arrangement structure for achieving ground speed PTO as described in claim 8, characterized in that, The synchronizer assembly includes a first synchronizer ring, a second synchronizer ring, and a engagement sleeve. The first synchronizer ring is connected to the engagement sleeve, the second synchronizer ring is connected to the drive shaft, and the engagement sleeve is connected to the connecting shaft. By moving the shift fork, the connecting shaft is connected to the engagement sleeve via the engagement sleeve and the first synchronizer ring, or the connecting shaft is connected to the drive shaft via the engagement sleeve and the second synchronizer ring.

10. An agricultural machinery device, characterized in that, Includes the arrangement structure for achieving ground speed PTO as described in any one of claims 1-9.

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