Power takeoff

Abstract

The utility model discloses a power takeoff, which relates to the technical field of power takeoff equipment and comprises an integral shell, an oil pump seat and an air cylinder body, the oil pump seat is mounted on the front side of the integral shell through bolts, and a first sealing gasket is arranged at the joint of the integral shell and the oil pump seat. A plurality of key components such as the oil pump seat and the air cylinder body are integrated through the design of the integral shell, the compactness and the overall strength are improved, the first tapered roller bearing and the second tapered roller bearing are installed at the two ends of the driving bevel gear respectively, and therefore the overall strength of the driving bevel gear is improved, and the service life of the driving bevel gear is prolonged. The radial positioning precision of the driving bevel gear is improved, the jumping of the gear ring and the transmission noise are reduced, meanwhile, the effect of bearing radial and axial loads is improved, the center distance can be properly reduced on the basis of improving the bearing capacity through the arrangement of the bevel gear, and then the stability and precision of gear transmission are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of power take-off devices, specifically to a power take-off. Background Technique

[0002] The power take-off, also known as a power take-off unit, is a set of one or more speed-changing gears. It is generally composed of a gearbox, a clutch, and a controller. It is connected to the low-speed gear of the gearbox or the output shaft of the auxiliary box, and is connected to the input shaft of a power take-off device such as a lift pump. It is a separate gear in the gearbox. When this gear is engaged and the accelerator is pressed, the lift pump can operate.

[0003] Patent document CN204109811U discloses a rear-mounted power take-off assembly, which discloses that "the utility model relates to a rear-mounted power take-off assembly, characterized in that: a transition connection plate is fixed at the rear end of the transmission, the power take-off assembly is fixed on the transition connection plate, the power take-off input shaft is located in the middle of the power take-off housing, the front end of the power take-off input shaft extending out of the power take-off housing is connected to the intermediate shaft of the main box of the transmission through a power take-off shaft sleeve, the rear end of the power take-off input shaft is provided with a spline tooth seat, an external spline is provided on the input shaft spline tooth seat, an internal spline groove is provided on the inner side of the power take-off shift gear sleeve, and the power take-off shift gear sleeve is fixedly connected to the input shaft spline tooth seat through the cooperation of the internal spline groove and the external spline. The middle section of the power take-off input shaft is fixedly connected to the power take-off input gear through a needle roller bearing. The shift fork shaft is located above the inner part of the power take-off housing. The air inlet joint on the power take-off housing is connected to one end of the shift fork shaft inside the power take-off housing. The shift fork is fixedly connected to the shift fork shaft. The outer side of the power take-off shift gear sleeve is provided with a shift fork groove, and the shift fork cooperates with the shift fork groove. It solves the problems of difficult assembly, difficult power take-off, and single output form of the power take-off."

[0004] However, the rear-mounted power take-off assembly in the above-mentioned disclosed document mainly considers how to solve the problems of difficult assembly, difficult power take-off, and single output form of the power take-off, and is not convenient for adjusting the stability and precision during the use of the power take-off.

[0005] In view of this, it is necessary to develop a power take-off that can improve the transmission smoothness and precision during the use of the power take-off. Content of the Utility Model

[0006] The purpose of the utility model is to provide a power take-off to solve the technical problems raised in the above background technique.

[0007] To achieve the above purpose, the utility model provides the following technical solution: a power take-off, including an integral housing, an oil pump seat, and a cylinder block. The front of the integral housing is installed with an oil pump seat through bolts, and a first gasket is provided at the connection between the integral housing and the oil pump seat. The top of the integral housing is installed with a cylinder block through bolts, and a second gasket is provided at the connection between the integral housing and the cylinder block;

[0008] The integral housing includes a driving chamber and an output chamber. At the front end of the inner wall of the driving chamber, a first tapered roller bearing is installed. At the rear end of the inner wall of the driving chamber, a second tapered roller bearing is installed. An active helical gear is movably connected to the inner wall of the driving chamber, and both ends of the active helical gear are respectively installed on the inner walls of the first tapered roller bearing and the second tapered roller bearing.

[0009] A first adjustment hole is provided on one side of the driving chamber. A first bowl-shaped gasket is installed on the inner wall of the first adjustment hole. One end of the first bowl-shaped gasket is movably connected to a first flat-end set screw. One end of the first flat-end set screw is movably connected to a first adjustment sleeve, and one end of the first adjustment sleeve is movably connected to the other end of the active helical gear.

[0010] Preferably, a second adjustment hole is provided at the other end of the output chamber. A second bowl-shaped gasket is installed on the inner wall of the second adjustment hole. The other end of the second bowl-shaped gasket is movably connected to a second flat-end set screw. The other end of the second flat-end set screw is movably connected to a second adjustment sleeve.

[0011] Preferably, a third tapered roller bearing is installed at the rear end of the inner wall of the output chamber. An output shaft is installed on the inner wall of the third tapered roller bearing. One end of the third tapered roller bearing is movably connected to a spacer. One end of the spacer is movably connected to an output helical gear. One end of the outer wall of the output helical gear is installed with a first output spur gear.

[0012] Preferably, a first needle roller bearing is movably connected to the front end of the inner wall of the output helical gear, and a second needle roller bearing is movably connected to the rear end of the inner wall of the output helical gear. The inner walls of both the first needle roller bearing and the second needle roller bearing are installed on the outer wall of the output shaft.

[0013] Preferably, a second output spur gear is installed in the middle of the outer wall of the output shaft. A meshing sleeve is meshed with the outer wall of the second output spur gear. An arc groove is provided on the outer wall of the meshing sleeve. A shift fork is movably connected to the inner wall of the arc groove.

[0014] Preferably, a sealing plate is installed at one end of the oil pump seat. An oil seal is installed at the front end of the inner wall of the oil pump seat. A fourth tapered roller bearing is installed in the middle of the oil pump seat. One end of the fourth tapered roller bearing is installed at the other end of the oil seal, and the inner wall of the fourth tapered roller bearing is installed on the outer wall of the output shaft.

[0015] Preferably, a cylinder head is installed at one end of the cylinder block through bolts, and a third gasket is provided at the connection between the cylinder block and the cylinder head. A signal switch is installed on one side of the cylinder block. A piston rod is installed in the inner wall of the cylinder block, and the front end of the outer wall of the piston rod penetrates and is installed at the top of one side of the shift fork. A pressure spring is movably connected to the outer wall of the piston rod, and one end of the pressure spring is installed at the top of one side of the shift fork.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] 1. Through the design of the integral housing, the present utility model integrates multiple key components such as the oil pump seat and the cylinder block, which is beneficial to improving the compactness and overall strength. The first tapered roller bearing and the second tapered roller bearing are respectively installed at both ends of the driving helical gear, which is beneficial to improving the radial positioning accuracy of the driving helical gear, reducing the tooth ring runout and transmission noise, and at the same time improving the effect of bearing radial and axial loads. The setting of the helical gear can appropriately reduce the center distance on the basis of improving the load-carrying capacity, thereby ensuring the smoothness and accuracy of the gear transmission.

[0018] 2. Through the design of the second adjustment hole and its supporting second bowl-shaped gasket, second flat-end set screw and second adjusting sleeve, a convenient channel is provided for adjusting the pre-tightening force of the output helical gear or related components. Maintenance or adjustment can be carried out without disassembling too many components, improving the maintenance efficiency and flexibility.

[0019] 3. The present utility model ensures the airtightness of the cylinder through the third gasket between the cylinder block and the cylinder head, preventing gas leakage. The precise cooperation of the piston rod with the fork and the pressure spring makes the power transmission more flexible and accurate. Together with the cooperation of the output helical gear with the first output spur gear, the second output spur gear and the engagement sleeve, an efficient transmission mechanism is formed, meeting the power requirements under different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a three-dimensional view of the overall structure of the present utility model;

[0021] Figure 2 is a three-dimensional schematic diagram of the internal structure of the integral housing of the present utility model;

[0022] Figure 3 is a top view schematic diagram of the internal structure of the integral housing of the present utility model;

[0023] Figure 4 is an exploded schematic diagram of the internal structure of the integral housing of the present utility model;

[0024] Figure 5 is an exploded schematic diagram of the internal structure of the cylinder block of the present utility model;

[0025] Figure 6 is a three-dimensional structure schematic diagram of the integral housing of the present utility model.

[0026] In the figure: 1. Integral housing; 2. Oil pump seat; 3. Cylinder block; 4. First gasket; 5. Second gasket; 6. Driving chamber; 7. Output chamber; 8. First tapered roller bearing; 9. Second tapered roller bearing; 10. Driving helical gear; 11. First adjustment hole; 12. First cup-shaped washer; 13. First flat-end set screw; 14. First adjusting sleeve; 15. Second adjustment hole; 16. Second cup-shaped washer; 17. Second flat-end set screw; 18. Second adjusting sleeve; 19. Third tapered roller bearing; 20. Output shaft; 21. Spacer ring; 22. Output helical gear; 23. First output spur gear; 24. First needle roller bearing; 25. Second needle roller bearing; 26. Second output spur gear; 27. Engagement sleeve; 28. Arc groove; 29. Fork; 30. Sealing plate; 31. Oil seal; 32. Fourth tapered roller bearing; 33. Cylinder head; 34. Third gasket; 35. Piston rod; 36. Pressure spring; 37. Signal switch. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Please refer to Figure 1 、 Figure 2 、Figure 3 and Figure 4 , an embodiment provided by the present utility model, a power take-off, comprising an integral housing 1, an oil pump seat 2 and a cylinder block 3. The front of the integral housing 1 is bolted with the oil pump seat 2, and a first gasket 4 is provided at the connection between the integral housing 1 and the oil pump seat 2. The top of the integral housing 1 is bolted with the cylinder block 3, and a second gasket 5 is provided at the connection between the integral housing 1 and the cylinder block 3;

[0031] The integral housing 1 includes a driving chamber 6 and an output chamber 7. At the front end of the inner wall of the driving chamber 6, a first tapered roller bearing 8 is installed. At the tail end of the inner wall of the driving chamber 6, a second tapered roller bearing 9 is installed. The inner wall of the driving chamber 6 is movably connected with a driving helical gear 10, and both ends of the driving helical gear 10 are respectively installed on the inner walls of the first tapered roller bearing 8 and the second tapered roller bearing 9;

[0032] On one side of the driving chamber 6, a first adjustment hole 11 is provided. The inner wall of the first adjustment hole 11 is installed with a first cup-shaped washer 12. One end of the first cup-shaped washer 12 is movably connected with a first flat-end set screw 13. One end of the first flat-end set screw 13 is movably connected with a first adjusting sleeve 14, and one end of the first adjusting sleeve 14 is movably connected to the other end of the driving helical gear 10;

[0033] Furthermore, through the design of the integral housing 1, multiple key components such as the oil pump seat 2 and the cylinder block 3 are integrated together, which is beneficial to improving the compactness and overall strength. The first tapered roller bearing 8 and the second tapered roller bearing 9 are respectively installed at both ends of the driving helical gear 10, which is beneficial to improving the radial positioning accuracy of the driving helical gear 10, reducing the tooth ring runout and transmission noise, and at the same time improving the effect of bearing radial and axial loads. The setting of the helical gear can appropriately reduce the center distance on the basis of improving the load-bearing capacity, thereby ensuring the smoothness and accuracy of the gear transmission.

[0034] Please refer to Figure 2 、 Figure 3 and Figure 4 , an embodiment provided by the present utility model. At the other end of the output chamber 7, a second adjustment hole 15 is provided. The inner wall of the second adjustment hole 15 is installed with a second cup-shaped washer 16. The other end of the second cup-shaped washer 16 is movably connected with a second flat-end set screw 17. The other end of the second flat-end set screw 17 is movably connected with a second adjusting sleeve 18;

[0035] At the tail end of the inner wall of the output chamber 7, a third tapered roller bearing 19 is installed. The inner wall of the third tapered roller bearing 19 is installed with an output shaft 20. One end of the third tapered roller bearing 19 is movably connected with a spacer 21. One end of the spacer 21 is movably connected with an output helical gear 22. One end of the outer wall of the output helical gear 22 is installed with a first output spur gear 23;

[0036] Furthermore, through the design of the second adjustment hole 15 and its supporting second bowl-shaped plug 16, second flat-end set screw 17 and second adjustment sleeve 18, a convenient channel is provided for adjusting the pre-tightening force of the output helical gear 22 or related components. Maintenance or adjustment can be carried out without disassembling too many components, improving the maintenance efficiency and flexibility;

[0037] Please refer to Figure 1 、 Figure 5 and Figure 6 In an embodiment provided by the present utility model, a first needle roller bearing 24 is movably connected to the front end of the inner wall of the output helical gear 22, and a second needle roller bearing 25 is movably connected to the tail end of the inner wall of the output helical gear 22. The inner walls of the first needle roller bearing 24 and the second needle roller bearing 25 are both installed on the outer wall of the output shaft 20;

[0038] A second output spur gear 26 is installed in the middle of the outer wall of the output shaft 20. A meshing sleeve 27 is meshed with the outer wall of the second output spur gear 26. An arc groove 28 is provided on the outer wall of the meshing sleeve 27, and a shift fork 29 is movably connected to the inner wall of the arc groove 28;

[0039] One end of the oil pump seat 2 is installed with a sealing plate 30. An oil seal 31 is installed at the front end of the inner wall of the oil pump seat 2. A fourth tapered roller bearing 32 is installed in the middle of the oil pump seat 2. One end of the fourth tapered roller bearing 32 is installed at the other end of the oil seal 31, and the inner wall of the fourth tapered roller bearing 32 is installed on the outer wall of the output shaft 20;

[0040] One end of the cylinder block 3 is installed with a cylinder head 33 through bolts, and a third gasket 34 is provided at the connection between the cylinder block 3 and the cylinder head 33. A signal switch 37 is installed on one side of the cylinder block 3. A piston rod 35 is installed in the inner wall of the cylinder block 3. The front end of the outer wall of the piston rod 35 penetrates and is installed at the top of one side of the shift fork 29. A pressure spring 36 is movably connected to the outer wall of the piston rod 35, and one end of the pressure spring 36 is installed at the top of one side of the shift fork 29

[0041] Furthermore, the third gasket 34 between the cylinder block 3 and the cylinder head 33 ensures the airtightness of the cylinder and prevents gas leakage. The precise cooperation of the piston rod 35 with the shift fork 29 and the pressure spring 36 makes the power transmission more flexible and accurate. Together with the cooperation of the output helical gear 22 with the first output spur gear 23, the second output spur gear 26 and the meshing sleeve 27, an efficient transmission mechanism is formed, meeting the power requirements under different working conditions.

[0042] Working principle: Through the design of the integral housing 1, multiple key components such as the oil pump seat 2 and the cylinder block 3 are integrated together, which is beneficial to improving the compactness and overall strength. The first tapered roller bearing 8 and the second tapered roller bearing 9 are respectively installed at both ends of the driving helical gear 10, which is beneficial to improving the radial positioning accuracy of the driving helical gear 10, reducing the tooth ring runout and transmission noise, and at the same time improving the effect of bearing radial and axial loads. The setting of the helical gear can appropriately reduce the center distance on the basis of improving the load-bearing capacity, thereby ensuring the smoothness and accuracy of gear transmission. Through the design of the second adjustment hole 15 and its supporting second bowl-shaped shim 16, second flat-end set screw 17 and second adjustment sleeve 18, a convenient channel is provided for adjusting the pre-tightening force of the output helical gear 22 or related components. Maintenance or adjustment can be carried out without disassembling too many components, improving the maintenance efficiency and flexibility. The sealing of the cylinder is ensured by the third gasket 34 between the cylinder block 3 and the cylinder head 33, preventing gas leakage. The precise cooperation of the piston rod 35 with the fork 29 and the pressure spring 36 makes the power transmission more flexible and accurate. Together with the cooperation of the output helical gear 22 with the first output spur gear 23, the second output spur gear 26 and the engagement sleeve 27, an efficient transmission mechanism is formed, meeting the power requirements under different working conditions.

[0043] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A power take-off, comprising an integral housing (1), an oil pump base (2) and a cylinder block (3), characterized in that: The front of the integral housing (1) is bolted with an oil pump seat (2), and a first gasket (4) is provided at the connection between the integral housing (1) and the oil pump seat (2). The top of the integral housing (1) is bolted with a cylinder block (3), and a second gasket (5) is provided at the connection between the integral housing (1) and the cylinder block (3). The integral housing (1) includes a driving chamber (6) and an output chamber (7). At the front end of the inner wall of the driving chamber (6), a first tapered roller bearing (8) is installed. At the rear end of the inner wall of the driving chamber (6), a second tapered roller bearing (9) is installed. The inner wall of the driving chamber (6) is movably connected with a driving helical gear (10), and both ends of the driving helical gear (10) are respectively installed on the inner walls of the first tapered roller bearing (8) and the second tapered roller bearing (9). On one side of the driving chamber (6), a first adjustment hole (11) is opened. A first bowl-shaped plug (12) is installed on the inner wall of the first adjustment hole (11). One end of the first bowl-shaped plug (12) is movably connected with a first flat-end set screw (13). One end of the first flat-end set screw (13) is movably connected with a first adjustment sleeve (14), and one end of the first adjustment sleeve (14) is movably connected to the other end of the driving helical gear (10).

2. The power take-off according to claim 1, characterized in that: On the other end of the output chamber (7), a second adjustment hole (15) is opened. A second bowl-shaped plug (16) is installed on the inner wall of the second adjustment hole (15). The other end of the second bowl-shaped plug (16) is movably connected with a second flat-end set screw (17). The other end of the second flat-end set screw (17) is movably connected with a second adjustment sleeve (18).

3. The power take-off according to claim 1, wherein: At the rear end of the inner wall of the output chamber (7), a third tapered roller bearing (19) is installed. An output shaft (20) is installed on the inner wall of the third tapered roller bearing (19). One end of the third tapered roller bearing (19) is movably connected with a spacer ring (21). One end of the spacer ring (21) is movably connected with an output helical gear (22). One end of the outer wall of the output helical gear (22) is installed with a first output spur gear (23).

4. The power take-off according to claim 3, wherein: The front end of the inner wall of the output helical gear (22) is movably connected with a first needle bearing (24). The rear end of the inner wall of the output helical gear (22) is movably connected with a second needle bearing (25), and the inner walls of both the first needle bearing (24) and the second needle bearing (25) are installed on the outer wall of the output shaft (20).

5. The power take-off according to claim 3, characterized in that: In the middle of the outer wall of the output shaft (20), a second output spur gear (26) is installed. A meshing sleeve (27) is meshed with the outer wall of the second output spur gear (26). An arc groove (28) is opened on the outer wall of the meshing sleeve (27). A shift fork (29) is movably connected with the inner wall of the arc groove (28).

6. The power take-off according to claim 1, characterized in that: One end of the oil pump seat (2) is installed with a sealing plate (30). At the front end of the inner wall of the oil pump seat (2), an oil seal (31) is installed. In the middle of the oil pump seat (2), a fourth tapered roller bearing (32) is installed, and one end of the fourth tapered roller bearing (32) is installed at the other end of the oil seal (31), and the inner wall of the fourth tapered roller bearing (32) is installed on the outer wall of the output shaft (20).

7. The power take-off according to claim 1, wherein: One end of the cylinder block (3) is mounted with a cylinder head (33) through bolts, and a third gasket (34) is arranged at the connection between the cylinder block (3) and the cylinder head (33). A signal switch (37) is mounted on one side of the cylinder block (3). A piston rod (35) is mounted on the inner wall of the cylinder block (3), and the front end of the outer wall of the piston rod (35) is installed through the top of one side of the shift fork (29). A pressure spring (36) is movably connected to the outer wall of the piston rod (35), and one end of the pressure spring (36) is installed at the top of one side of the shift fork (29).

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