Transfer motor driving assembly of power output shaft

Abstract

The utility model discloses a transfer motor drive assembly of a power output shaft, which comprises an upper shell, a lower shell, a powder metallurgy gear positioning plate and a gear component, the powder metallurgy gear positioning plate is arranged in the upper shell, a cantilever shaft I, a cantilever shaft II and a cantilever shaft III are arranged on the powder metallurgy gear positioning plate, and the cantilever shaft I, the cantilever shaft II and the cantilever shaft III are arranged on the lower shell. The gear assembly is installed on the powder metallurgy gear positioning plate through a first cantilever shaft, a second cantilever shaft and a third cantilever shaft, the gear assembly is connected with an output rotating shaft, the output rotating shaft is connected with a cam, and the upper shell is provided with an external executing mechanism. The utility model belongs to the technical field of transfer motor driving, and particularly relates to a transfer motor driving assembly of a power output shaft, which can reduce clamping stagnation of a shifting fork, avoid meshing delay of a spline shifting sleeve, and has the advantages of timely power distribution response, stable working performance, low noise, easiness in assembly and small volume.

Description

Technical Field

[0001] The utility model belongs to the technical field of transfer motor drive, in particular to a transfer motor drive assembly of a power output shaft. Background Art

[0002] The driving functions of currently available all-terrain vehicles are usually set to three states: two-wheel drive, four-wheel drive and four-wheel drive locked. The three states are switched by using a bridge motor to control the shift fork, so that the splines of the spline shift sleeve are engaged or disengaged with the splines of the half-shaft gear, thereby achieving connection or disengagement with the half-shaft gear.

[0003] The existing bridge motor assembly is large in size, the internal reduction gear of the motor is easy to wear, the gear shaft positioning is not accurate, and the noise is loud, which affects the comfort of use. The actuator pin outside the motor is not flexible and is easy to wear, resulting in uneven force on the shift fork and jamming of the shift fork, which causes delayed engagement of the spline sleeve and untimely power distribution. It is difficult to accurately indicate the vehicle's driving status, affecting working stability.

[0004] The utility model provides a power output shaft transfer motor drive assembly that can reduce the sticking of the shift fork and avoid the delay in the engagement of the spline shift sleeve, thereby achieving the advantages of timely power distribution response, stable working performance, low noise, easy assembly, and small size. Utility Model Content

[0005] In order to solve the above problems, the utility model provides a transfer motor drive assembly of a power output shaft with a small size, which can reduce the sticking of the shift fork, avoid the delay of the engagement of the spline shift sleeve, and achieve timely power distribution response, stable working performance, low noise, easy assembly and small size.

[0006] In order to achieve the above functions, the technical solution adopted by the utility model is as follows: a transfer motor drive assembly of a power output shaft, comprising an upper shell, a lower shell, a powder metallurgy gear positioning plate and a gear assembly, the powder metallurgy gear positioning plate is installed in the upper shell, and cantilever shaft one, cantilever shaft two and cantilever shaft three are arranged on the powder metallurgy gear positioning plate, the gear assembly is installed on the powder metallurgy gear positioning plate through cantilever shaft one, cantilever shaft two and cantilever shaft three, the gear assembly is connected to an output shaft, the output shaft is connected to a cam, and the upper shell is provided with an external actuator.

[0007] As a preferred technical solution of the utility model, the external actuator includes a rocker arm, a dial pin and a torsion spring, the rocker arm is provided with an elliptical groove, the cam is arranged in contact with the elliptical groove, the dial pin is connected to the rocker arm, the torsion spring is installed on the dial pin, and the support leg of the torsion spring is connected to the dial pin.

[0008] As a preferred technical solution of the utility model, the external actuator also includes a shift fork and a spline shift sleeve, and the shift pin is provided with an arc protrusion, and the arc protrusion is arranged in contact with the bottom of the shift fork.

[0009] As a preferred technical solution of the utility model, a motor is installed in the upper shell, a worm is connected to the output end of the motor, a worm wheel is sleeved on the cantilever shaft, and the worm wheel is meshed with the worm.

[0010] As a preferred technical solution of the utility model, the gear assembly includes pinion 1, pinion 2, pinion 3, transmission gear 1, transmission gear 2 and a driving gear, wherein a set of pinion gears is arranged on cantilever shaft 1 and is located below the worm gear, the transmission gear 1 and pinion 2 are arranged on cantilever shaft 2, the transmission gear 1 is meshed with pinion 1, the transmission gear 1 is located below pinion 2, the transmission gear 2 and pinion 3 are arranged on cantilever shaft 3, the transmission gear 2 is meshed with pinion 2, the transmission gear 2 is located above pinion 3, the driving gear is connected to the output shaft, and the driving gear is meshed with pinion 3.

[0011] Compared with the prior art, the utility model adopts the above structure to achieve the following beneficial effects:

[0012] 1. Use the cantilever shaft fixedly connected to the powder metallurgy gear positioning plate inside the motor, and connect multiple gears in series through the gear inner hole clearance fit to form a precisely positioned reduction gear set, thereby reducing the occupied space;

[0013] 2. The gear output shaft accurately and smoothly transmits the torque to the external actuator, and then the torsion spring in the actuator stores the torque, which is transmitted to the shifting foot with a circular arc protrusion through the support foot of the torsion spring. The circular arc protrusion on the shifting foot pushes the shifting fork to perform the engagement or separation action of the differential output shaft;

[0014] 3. The arc protrusion on the shift pin cooperates with the shift fork to balance the force on the shift fork, reduce the wear of the shift pin, reduce the jamming of the shift fork, avoid the delay of the spline shift sleeve engagement, and ensure timely power distribution response.

[0015] It has the advantages of stable working performance, low noise, easy assembly and small size. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a transfer motor drive assembly of a power output shaft proposed by the utility model;

[0017] Figure 2 This is a top view structural schematic diagram of a transfer motor drive assembly of a power output shaft proposed by the utility model;

[0018] Figure 3 It is an exploded schematic diagram of a transfer motor drive assembly of a power output shaft proposed by the utility model;

[0019] Figure 4 This is a schematic diagram of the internal structure of an upper housing of a transfer motor drive assembly of a power output shaft proposed by the utility model;

[0020] Figure 5 This is a schematic diagram of the internal structure of an upper housing of a transfer motor drive assembly of a power output shaft proposed by the utility model;

[0021] Figure 6 The utility model provides a schematic structural diagram of a gear assembly and an external actuator of a transfer motor drive assembly of a power output shaft.

[0022] Among them, 1. upper shell, 2. lower shell, 3. powder metallurgy gear positioning plate, 4. gear assembly, 5. cantilever shaft one, 6. cantilever shaft two, 7. cantilever shaft three, 8. output shaft, 9. cam, 10. external actuator, 11. rocker arm, 12. shift foot, 13. torsion spring, 14. elliptical groove, 15. shift fork, 16. spline shift sleeve, 17. arc protrusion, 18. motor, 19. worm, 20. worm wheel, 21. pinion one, 22. pinion two, 23. pinion three, 24. transmission gear one, 25. transmission gear two, 26. drive gear. DETAILED DESCRIPTION

[0023] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. The present utility model is further described in detail below in conjunction with the accompanying drawings.

[0025] like Figure 1-6As shown, the utility model provides a transfer motor drive assembly of a power output shaft, comprising an upper shell 1, a lower shell 2, a powder metallurgy gear positioning plate 3 and a gear assembly 4, the powder metallurgy gear positioning plate 3 is installed in the upper shell 1, and a cantilever shaft 1 5, a cantilever shaft 2 6 and a cantilever shaft 3 7 are provided on the powder metallurgy gear positioning plate 3, the gear assembly 4 is installed on the powder metallurgy gear positioning plate 3 through the cantilever shaft 1 5, the cantilever shaft 2 6 and the cantilever shaft 3 7, the gear assembly 4 is connected to an output shaft 8, the output shaft 8 is connected to a cam 9, and the upper shell 1 is provided with an external actuator 10.

[0026] like Figure 1 , 2 As shown in Figure 6, the external actuator 10 includes a rocker 11, a shifting foot 12 and a torsion spring 13. The rocker 11 is provided with an elliptical groove 14, the cam 9 is arranged in contact with the elliptical groove 14, the shifting foot 12 is connected to the rocker 11, the torsion spring 13 is installed on the shifting foot 12, and the support leg of the torsion spring 13 is connected to the shifting foot 12; the external actuator 10 also includes a shift fork 15 and a spline shifting sleeve 16, the shifting foot 12 is provided with an arc protrusion 17, the arc protrusion 17 is arranged in contact with the bottom of the shift fork, and the arc protrusion 17 is used to contact the shift fork 15. Contact drive makes the fork 15 subjected to balanced force and less stuck. The spline sleeve 16 is located inside the fork 15. The cam 9 on the output shaft 8 of the gear assembly 4 contacts the elliptical groove 14 inside the rocker 11, pushing the rocker 11 to swing, thereby compressing the torsion spring 13 leg, and then transmitting torque to the shift pin 12 through the torsion spring 13, driving the fork 15 and shifting the spline sleeve 16 to engage. When the shift pin 12 encounters greater resistance, the torsion spring 13 will store torque energy to prevent the shift pin 12 and the fork 15 from being rigidly driven and damaging the fork 15.

[0027] like Figure 3 and 5 As shown, a motor 18 is installed in the upper shell 1, and a worm 19 is connected to the output end of the motor 18. A worm wheel 20 is sleeved on the cantilever shaft 5. The worm wheel 20 is meshed with the worm 19. The motor 18 drives the worm 19 to rotate, and the worm 19 drives the worm wheel 20 to rotate, which is the driving source of the entire gear assembly 4.

[0028] like Figure 3-6As shown, the gear assembly 4 includes a pinion 21, a pinion 22, a pinion 3 23, a transmission gear 1 24, a transmission gear 25 and a driving gear 26. The pinion 21 is sleeved on the cantilever shaft 5 and is located below the worm gear 20. The transmission gear 1 24 and the pinion 2 22 are sleeved on the cantilever shaft 6. The transmission gear 1 24 is meshed with the pinion 1 21. The transmission gear 1 24 is located below the pinion 2 22. The transmission gear 2 25 and the pinion 3 23 are sleeved on the cantilever shaft 7. The transmission gear 2 25 is meshed with the pinion 2 22. The transmission gear 2 25 is located below the pinion 2 22. Above the cantilever shaft 1, a driving gear 26 is connected to the output shaft 8, and the driving gear 26 is meshed with the pinion gear 3 23. The worm gear 20 drives the cantilever shaft 1 5 to rotate while driving the pinion gear 1 21 to rotate. The pinion gear 1 21 drives the transmission gear 1 24 to rotate, and the transmission gear 1 24 drives the pinion gear 2 22 on the cantilever shaft 2 6 to rotate. The pinion gear 2 22 drives the transmission gear 2 25 to rotate. The transmission gear 2 25 drives the pinion gear 3 23 on the cantilever shaft 3 7 to rotate, and the pinion gear 3 23 drives the driving gear 26 to rotate. The gear assemblies 4 are arranged in parallel and staggered up and down to reduce the occupied space and reduce the overall volume.

[0029] When in use, the motor 18 drives the worm 19 to rotate, the worm 19 drives the worm wheel 20 to rotate, the worm wheel 20 drives the cantilever shaft 5 to rotate while driving the pinion 21 to rotate, the pinion 21 drives the transmission gear 24 to rotate, and the transmission gear 24 drives the pinion 22 on the cantilever shaft 26 to rotate, the pinion 22 drives the transmission gear 25 to rotate, the transmission gear 25 drives the pinion 3 23 on the cantilever shaft 3 7 to rotate, the pinion 3 23 drives the drive gear 26 to rotate, and the drive gear 2 6 drives the cam 9 on the output shaft 8 to contact the elliptical groove 14 inside the swing rod 11, pushing the swing rod 11 to swing, thereby compressing the torsion spring 13 support leg, and then transmitting torque to the shifting foot 12 through the torsion spring 13, driving the shift fork 15, and shifting the spline shifting sleeve 16 to engage. When the shifting foot 12 encounters a large resistance, the torsion spring 13 will store torque energy to prevent the shifting foot 12 and the shift fork 15 from being rigidly driven and damaging the shift fork 15. The arc protrusion 17 on the shifting foot 12 pushes the shift fork 15 to perform the differential output shaft engagement or separation action.

[0030] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. A transfer motor drive assembly for a power output shaft, characterized in that: The invention comprises an upper shell (1), a lower shell (2), a powder metallurgy gear positioning plate (3) and a gear assembly (4); the powder metallurgy gear positioning plate (3) is installed in the upper shell (1); a cantilever shaft 1 (5), a cantilever shaft 2 (6) and a cantilever shaft 3 (7) are arranged on the powder metallurgy gear positioning plate (3); the gear assembly (4) is installed on the powder metallurgy gear positioning plate (3) via the cantilever shaft 1 (5), the cantilever shaft 2 (6) and the cantilever shaft 3 (7); an output rotating shaft (8) is connected to the gear assembly (4); a cam (9) is connected to the output rotating shaft (8); and the upper shell (1) is provided with an external actuator (10).

2. A transfer motor drive assembly for a power output shaft according to claim 1, characterized in that: The external actuator (10) comprises a rocker (11), a driving foot (12) and a torsion spring (13); the rocker (11) is provided with an elliptical groove (14); the cam (9) is arranged in contact with the elliptical groove (14); the driving foot (12) is connected to the rocker (11); the torsion spring (13) is mounted on the driving foot (12); and the supporting foot of the torsion spring (13) is connected to the driving foot (12).

3. A transfer motor drive assembly for a power output shaft according to claim 2, characterized in that: The external actuator (10) further comprises a shift fork (15) and a spline shift sleeve (16); the shift foot (12) is provided with an arc protrusion (17), and the arc protrusion (17) is arranged in contact with the bottom of the shift fork.

4. A transfer motor drive assembly for a power output shaft according to claim 3, characterized in that: A motor (18) is installed in the upper shell (1), the output end of the motor (18) is connected to a worm (19), a worm wheel (20) is sleeved on the cantilever shaft (5), and the worm wheel (20) is meshed with the worm (19).

5. A transfer motor drive assembly for a power output shaft according to claim 4, characterized in that: The gear assembly (4) comprises a pinion gear 1 (21), a pinion gear 2 (22), a pinion gear 3 (23), a transmission gear 1 (24), a transmission gear 2 (25) and a driving gear (26); the pinion gear 1 (21) is sleeved on the cantilever shaft 1 (5) and is located below the worm gear (20); the transmission gear 1 (24) and the pinion gear 2 (22) are sleeved on the cantilever shaft 2 (6); the transmission gear 1 (24) is meshed with the pinion gear 1 (21) The transmission gear 1 (24) is located below the pinion gear 2 (22); the transmission gear 2 (25) and the pinion gear 3 (23) are sleeved on the cantilever shaft 3 (7); the transmission gear 2 (25) is meshed with the pinion gear 2 (22); the transmission gear 2 (25) is located above the pinion gear 3 (23); the driving gear (26) is connected to the output shaft (8); and the driving gear (26) is meshed with the pinion gear 3 (23).

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