WO2017041405A1

WO2017041405A1 - Gear shift mechanism having internal dual clutches

Info

Publication number: WO2017041405A1
Application number: PCT/CN2016/000514
Authority: WO
Inventors: 崔振华
Original assignee: 江苏汉凌合能汽车动力系统有限公司
Priority date: 2015-09-10
Filing date: 2016-09-09
Publication date: 2017-03-16

Abstract

A gear shift mechanism having internal dual clutches comprises a shell (1); a hollow shaft tube (2), a low speed gear assembly (3), a high speed gear assembly (4), a push pressure plate assembly (5), a shift lever (6), an output shaft (7) and a differential (8) which are arranged in the shell (1); and a shift driving device (9) fixed on the shell (1) and driving the shift lever (6) to move back and forth. The push pressure plate assembly is axially movably connected to the hollow shaft tube (2), but is relatively fixed in the circumferential direction. The center of the push pressure plate assembly (5) and the shift lever (6) are both arranged in an inner bore of the hollow shaft tube (2). The front part of the shift lever (6) is fixed axially opposite the center of the push pressure plate assembly (5), but is movably connected in the circumferential direction. The input end of the differential (8) and the output ends of the low speed gear assembly (3) and the high speed gear assembly (4) are all fixed on the output shaft (7). The gear shift mechanism has simple control method, and is simple in structure and low in cost.

Description

Shift mechanism with built-in dual clutch

Technical field

The present invention relates to a shifting mechanism with a built-in dual clutch.

Background technique

The torque of an electric vehicle without a transmission can only be varied within a very limited range and does not change to the optimum torque at this time, so in the case where the torque demand exceeds or falls below the torque range of the electric vehicle, The electric car of the transmission will show his disadvantage, and by adding a transmission, this state can be changed, and the appropriate gear can be hung in different torques according to different working conditions, thereby making the electric car The performance is greatly improved and the cooling system of the motor can be simplified. Therefore, the two-speed transmission has become an integral part of electric vehicles.

At present, the housing of the shifting mechanism of the two-speed transmission for electric vehicles is supported on the drive shaft tube by bearings, and the pushing force during shifting directly acts on the inner ring of the housing and the bearing of the connecting housing, and passes through The housing acts in the opposite direction on the outer ring of the bearing connecting the housing, which causes the inner ring and the outer ring of the bearing connecting the housing to be dislocated, so that the oil leakage phenomenon often occurs on the joint surface of the housing, and the bearing life is reduced.

In addition, there are many shortcomings of the existing two types of automatic transmission technology: (1) Automatic transmission in the form of AT planetary row, large in size, heavy in weight, complicated in manufacturing process, high in manufacturing cost, difficult in processing parts, and low in component qualification rate The failure rate is high and the repair is difficult. (2) Only the automatic transmission in the form of a synchronizer is not small in size, the weight is not light, and sometimes the shifting fails. The three-cone synchronizer parts are difficult to process, the parts pass rate is low, and the cost is high. Both of these transmissions have problems of large manufacturing difficulty, large volume, complicated control, high manufacturing and processing cost, high failure rate, and difficult maintenance.

The automatic transmission in the form of a synchronizer also has the following disadvantages: (1) The synchronizer requires a clutch fit to achieve shifting, which increases the volume of the transmission and affects the arrangement of the front position of the vehicle. (2) When the clutch is not used, the synchronizer will often have a meshing failure. These two shortcomings seriously hinder the development of automatic transmissions.

Summary of the invention

SUMMARY OF THE INVENTION It is an object of the present invention to provide a shifting mechanism with a simple dual-clutch with a simple structure and low cost, which overcomes the deficiencies of the prior art.

A technical solution for achieving the object of the present invention is: a shifting mechanism with a built-in dual clutch, including a housing, disposed in the housing Inner hollow shaft tube, low speed gear assembly, high speed gear assembly, push plate assembly, shift lever, output shaft and differential, and shifting fixed to the housing and driving the shift lever to move back and forth a driving device; the hollow shaft tube and the output shaft are rotatably supported on the housing; the pressing plate assembly is axially movably connected to the hollow shaft tube, but is circumferentially fixed; the low speed assembly and the high speed The input ends of the gear assembly are sleeved on the hollow shaft tube and respectively located on the front and rear sides of the pressing plate assembly; the center of the pressing plate assembly and the shifting lever are disposed in the hollow shaft tube In the hole; the front portion of the shift lever is relatively fixed to the center axial direction of the push plate assembly, but is circumferentially movably connected; the input end of the differential and the low speed assembly and the high speed assembly are The outputs are fixed to the output shaft.

A preferred technical solution: a shifting mechanism with a built-in dual clutch, further comprising a bearing positioning plate and a force positioning plate; the shift driving device includes a shifting execution gear and a motor, and the motor drives a shifting to perform gear rotation; the force positioning The outer peripheral surface of the disc is circumferentially movably connected with the hollow shaft tube, but the axial direction is relatively fixed; the axial center of the force receiving disc is provided with an inner through hole, and the inner through hole is provided with a middle thread connection with the shift lever An internal thread; the bearing positioning plate is fixed on the housing, and the rear end portion of the clamping force receiving disc restricts the circumferential rotation of the force positioning disc; the shifting execution gear is supported by the bearing on the bearing positioning plate and the shell The rear portion of the shift lever is axially movably coupled to the rotational shifting gear, but is circumferentially relatively fixed.

a shifting mechanism with a built-in dual clutch, further comprising a front bearing and a rear bearing; the housing comprising a front housing, a middle housing and a rear housing arranged in order from the front to the rear; the front housing being supported by the hollow shaft by a front bearing a front portion of the tube; the middle housing is supported at a rear portion of the hollow shaft tube by a rear bearing; the bearing positioning plate is fixed to the middle housing; the shifting execution gear is supported by the bearing at the bearing positioning plate and the rear housing Physically.

The front portion of the shift lever is connected to the push plate assembly by two bearings.

The internal thread in the inner through hole of the force receiving disc and the external thread on the shift lever engaged therewith are both T-shaped threads.

The rear end portion of the shift lever is coupled to the shifting gear through a keyway or a flat keyway.

The front bearing and the rear bearing are both deep groove bearings; the front end face of the front bearing and the rear end face of the rear bearing are both restricted by the collar; the front bearing and the low speed gear assembly, and the rear bearing A retaining washer is provided between the high speed gear assembly and the high speed gear assembly.

A first further preferred technical solution: two front and rear retaining rings are mounted in the inner hole of the rear end of the hollow shaft tube; the outer peripheral surface of the force receiving positioning disc is provided with a circumferential shoulder, and the shoulder is located on two pieces A plurality of first steel balls or first needles are evenly disposed between the retaining rings and between the shoulder and the two retaining rings.

The two retaining rings in the inner bore of the hollow shaft tube are each axially constrained by a collar.

a second further preferred technical solution: a portion of the hollow shaft tube that cooperates with the rear bearing is uniformly provided with a through hole in a circumferential direction, and a second steel ball or a second needle is placed in the through hole; The outer peripheral surface is provided with a semi-spherical spherical groove, and the second steel ball or the second rolling pin rolls in the semi-spherical spherical groove.

A height block is also disposed in the through hole of the hollow shaft tube; the height block is located between the rear bearing and the second steel ball or the second needle.

The low speed gear assembly includes a primary drive gear and a primary driven gear that mesh with each other; the high speed gear assembly includes a secondary drive gear and a secondary driven gear that mesh with each other; the primary drive gear and the second The stage drive gear is sleeved on the hollow shaft tube; the primary driven gear and the secondary driven gear are fixed on the output shaft.

A third further preferred technical solution: the pusher disk assembly comprises a joint head, an intermediate steering hub, a bolt, a friction plate and a pressure plate; the joint head is disposed in the hollow shaft tube and coaxial with the hollow shaft tube The front portion of the shift lever is axially fixed relative to the joint head, but is circumferentially movably connected; the intermediate hub is radially disposed with at least one bolt, and the bolt passes through a shaft disposed on the hollow shaft tube The long slot through hole is fixedly connected with the joint head; the intermediate hub plate is provided with a plurality of friction plates and a pressure plate; the first stage drive gear of the low speed gear assembly and the second stage drive gear of the high speed gear assembly The sides are provided with a toothed internal toothed hub that cooperates with the friction plate.

The front portion of the shift lever is coupled to the joint head of the push plate assembly by a deep groove bearing; the rear portion of the shift lever is supported on the housing by an axial linear sliding bearing.

The shift driving device includes a shifting motor, a screw rod and a swing rod; the screw rod is fixed on an output shaft of the shifting motor; one end of the swing rod is screwed to the screw rod, and the other end is hinged to the housing; The middle portion of the swing lever is provided with a slot that is slidably coupled to the tail of the shift lever.

The friction plate of the pressing plate assembly works in oil lubrication; the primary driving gear of the low speed gear assembly and the secondary driving gear of the high speed gear assembly are welded or integrated with the internal tooth rotating hub disk Key connection.

The primary drive gear of the low speed gear assembly and the secondary drive gear of the high speed gear assembly are supported on the hollow shaft tube by bearings.

A fourth further preferred technical solution: the push plate assembly includes a joint head, a bolt and an active platen; the joint head is disposed in the hollow shaft tube and disposed coaxially with the hollow shaft tube; the shifting operation The front portion of the rod is axially fixed relative to the joint head, but is circumferentially movably connected; the active pressure plate is radially disposed with at least one bolt, and the bolt passes through the axial long slot through hole and the joint head provided on the hollow shaft tube a fixed connection; a side of the first-stage driving gear of the low-speed gear assembly and a second-stage driving gear of the high-speed gear assembly are provided with a friction plate elastic assembly matched with the active pressure plate; the active pressure plate is circumferentially Uniform elastic steel ball, cylindrical pin or tapered joint tooth, the primary drive gear of the low-speed gear assembly and the secondary drive gear of the high-speed gear assembly are provided with the steel ball or the cylindrical pin in the circumferential direction. Hole, or tapered joint tooth.

The shift drive device includes a shift motor and a screw rod; the screw rod is fixed on an output shaft of the shift motor; and the tail portion of the shift lever is screwed with the screw rod.

The shifting mechanism with a built-in dual clutch further includes a guide rail; the rail is fixed to the housing; and the shift lever is slidably coupled to the rail.

An alternative technical solution: the output shaft is a hollow tube; the pressing disc assembly is axially movably connected to the output shaft, but the circumferential direction is relatively fixed; the input ends of the low speed gear assembly and the high speed gear assembly are fixed at a hollow shaft tube; the output ends of the low speed assembly and the high speed assembly are sleeved on the output shaft and respectively located on the front and rear sides of the pressing disc assembly; the center of the pressing disc assembly and The shift levers are all disposed in the inner bore of the output shaft; the front portion of the shift lever is fixed relative to the central axis of the push plate assembly, but is circumferentially movably connected; the input of the differential Fixed to the output shaft.

By adopting the above technical solution, the invention has the following beneficial effects: (1) The control method of the invention is very simple, avoiding the prior art using a complicated oil pump, a plurality of proportional solenoid valve controlled actuators, and complicated electromagnetic electricity. The valve block assembly and the complicated oil pipeline of the gearbox housing have a simple structure and low cost.

(2) The force locating disc of the present invention receives the axial thrust when the shift lever is shifted, so that the axial thrust force during shifting is resolved on the drive shaft tube, and the axial thrust during shifting is not Dispersion to the housing improves the stress state of the housing and effectively improves the stability and reliability of the product.

(3) The force locating disc of the present invention and the shift lever are connected by a T-shaped thread, so that the shift lever generates an axial displacement when it rotates itself, and can withstand the axial thrust when the shift lever is shifted. The structure is simple, stable and reliable.

(4) The rear end portion of the shift lever of the present invention is coupled to the shifting gear by a keyway or a flat keyway, so that the shift lever performs gear rotation only following the shift without axial displacement.

(5) The front end face of the front bearing of the present invention and the rear end face of the rear bearing are both restricted in axial position by the collar, so that the axial thrust acting on the front bearing and the rear bearing during the shifting is blocked by the collar, and Diffusion to the housing greatly reduces the forces on the joint surface of the housing.

(6) The shoulder on the outer peripheral surface of the force-receiving disk of the present invention, the first steel ball or the first needle roller and the two-piece retaining ring form two planar thrust bearings, which effectively prevent the axial displacement of the force-receiving disk, And it does not affect the high-speed rotation of the drive shaft tube while restricting the rotation of the force-positioning disk.

(7) The portion of the drive shaft tube that cooperates with the rear bearing is uniformly provided with a through hole in the circumferential direction, and a second steel ball or a second needle is placed in the through hole, and is disposed on the outer peripheral surface of the force receiving disk. The semi-circular ball groove allows the second steel ball or the second needle to roll in the semi-spherical ball groove, which can also prevent the axial displacement of the force-distributing disk and does not affect the high speed of the drive shaft tube under the condition of restricting the rotation of the force-positioning disk Rotating; placing a height block between the rear bearing and the second steel ball or the second needle can ensure a rolling gap of the second steel ball or the second needle in the semi-spherical groove.

(8) The present invention is applicable to variable-speed vehicles (vehicles, airplanes, ships) and other energy-saving speed-regulating equipments with more gear positions, and has a simple structure and a small number of parts. By arranging a plurality of identical shifting units, second gear and third gear can be realized. Gear shifting, seven-speed shifting, and nine-speed shifting are less demanding on machining accuracy, and the manufacturing cost is one-half of the current dual-clutch transmission. Thanks to the on-demand operation of the shifting motor, the transmission efficiency is increased by more than 10% compared to the existing dual clutch transmission.

DRAWINGS

In order to make the content of the present invention more easily understood, the present invention will be further described in detail below with reference to the accompanying drawings

Fig. 1 is a schematic view showing the structure of a first embodiment of the present invention.

Fig. 2 is a schematic view showing the structure of a second embodiment of the present invention.

Fig. 3 is a schematic view showing the structure of a third embodiment of the present invention.

Fig. 4 is a schematic view showing the structure of a fourth embodiment of the present invention.

The reference numerals in the drawings are:

Housing 1, front housing 1-1, middle housing 1-2, rear housing 1-3, hollow shaft tube 2, low speed gear assembly 3, primary drive gear 3-1, primary driven gear 3 -2, high-speed gear assembly 4, secondary drive gear 4-1, secondary driven gear 4-2, push plate assembly 5, joint head 5-1, intermediate hub 5-2, bolt 5- 3. Friction plate 5-4, active platen 5-5, shift lever 6, ball key groove 6-1, output shaft 7, differential 8, shift drive device 9, shift execution gear 9-1, Shift motor 9-2, swing rod 9-3, screw rod 9-4, bearing positioning plate 10, force locating disc 11, front bearing 12, rear bearing 13, collar 14, retaining washer 15, retaining ring 16, The first steel ball 17, the second steel ball 18, the height block 19, the friction plate elastic assembly 20, and the guide rail 21.

detailed description

(Example 1)

Referring to FIG. 1 , the shifting mechanism with built-in dual clutch of the present embodiment includes a housing 1 , a hollow shaft tube 2 disposed in the housing 1 , a low speed gear assembly 3 , a high speed gear assembly 4 , and a push plate assembly 5 . The shift lever 6, the output shaft 7, the differential 8, and the shift drive unit 9 fixed to the housing 1 and driving the shift lever 6 to move back and forth.

Both the hollow shaft tube 2 and the output shaft 7 are rotatably supported on the housing 1. The pusher disc assembly 5 is axially movably coupled to the hollow shaft tube 2, but is circumferentially relatively fixed. The input ends of the low speed gear assembly 3 and the high speed gear assembly 4 are sleeved on the hollow shaft tube 2 and respectively located on the front and rear sides of the pressing plate assembly 5. The center of the pusher disc assembly 5 and the shift lever 6 are both disposed in the inner bore of the hollow shaft tube 2. The front portion of the shift lever 6 is relatively fixed to the central axial direction of the push plate assembly 5, but is circumferentially movably connected. Specifically, the front portion of the shift lever 6 is connected to the push plate assembly through two bearings. . . The input of the differential 8 and the outputs of the low speed assembly 3 and the high speed assembly 4 are fixed to the output shaft 7.

The low speed gear assembly 3 includes a primary drive gear 3-1 and a primary driven gear 3-2 that mesh with each other. The high speed gear assembly 4 includes a secondary drive gear 4-1 and a secondary driven gear 4-2 that mesh with each other. The primary drive gear 3-1 and the secondary drive gear 4-1 are sleeved on the hollow shaft tube 2. The primary driven gear 3-2 and the secondary driven gear 4-2 are fixed to the output shaft 7. The primary drive gear 3-1 of the low speed gear assembly 3 and the secondary drive gear 4-1 of the high speed gear assembly 4 are supported by bearings On the hollow shaft tube 2.

The push plate assembly 5 includes a joint head 5-1, an intermediate hub 5-2, a bolt 5-3, a friction plate 5-4, and a platen. The joint head 5-1 is disposed in the hollow shaft tube 2 and disposed coaxially with the hollow shaft tube 2. The front portion of the shift lever 6 is axially fixed relative to the joint head 5-1, but is movably connected in the circumferential direction. At least one plug 5-3 is arranged radially of the intermediate hub 5-2, and the plug 5-3 is fixedly connected to the joint head 5-1 through an axial long slot through hole provided in the hollow shaft tube 2. A plurality of friction plates 5-4 and a pressure plate are disposed on the intermediate hub 5-2. The side of the primary drive gear 3-1 of the low speed gear assembly 3 and the secondary drive gear 4-1 of the high speed gear assembly 4 are provided with a toothed internal tooth drive hub that cooperates with the friction plate 5-4.

The front portion of the shift lever 6 is connected to the joint head 5-1 of the push plate assembly 5 by a deep groove bearing. The rear portion of the shift lever 6 is supported on the housing 1 by an axial linear sliding bearing.

The shift drive unit 9 includes a shift motor 9-2, a screw lever and a swing lever 9-3. The screw rod is fixed to the output shaft of the shift motor 9-2. One end of the swinging rod 9-3 is screwed to the screw rod, and the other end is hinged to the housing 1. The middle portion of the swing lever 9-3 is provided with a slot that is slidably coupled to the tail of the shift lever 6.

The friction plate 5-4 of the pusher disk assembly 5 operates in oil lubrication. The primary drive gear 3-1 of the low speed gear assembly 3 and the secondary drive gear 4-1 of the high speed gear assembly 4 are both welded or splined to the inner tooth drive hub.

The shifting mechanism with the built-in dual clutch of the embodiment adopts a wet multi-plate friction plate 5-4 built in the middle of two pairs of gears of different speed ratios of the transmission case, and is composed of a friction plate 5-4 and a rotating hub matched with the inner and outer teeth of the steel plate. Double clutch, this small double clutch directly replaces the traditional synchronizer, adopts the linkage mechanism to increase the positive pressure of the friction plate 5-4, so that the tangential friction force meets the torque demand, and the external force outside the casing 1 passes through the hollow shaft tube 2 The shift lever 6 and the joint head 5-1 are transmitted to the intermediate hub 5-2 to form an axial pressure. When the intermediate rotating hub 5-2 axially moves and presses the clutch internal tooth rotating hub on the driving gear, the plurality of friction plates of the inner and outer teeth are formed integrally by the tangential frictional force.

(Example 2)

Referring to Fig. 2, this embodiment is basically the same as Embodiment 1, except that the friction plate elastic assembly 20 and the guide rail 21 are further included.

The guide rail 21 is fixed to the housing 1. The shift lever 6 is slidably coupled to the guide rail 21. The shift drive unit 9 includes a shift motor 9-2 and a screw lever 9-4. The screw rod 9-4 is fixed to the output shaft of the shift motor 9-2. The tail of the shift lever 6 is screwed to the screw shaft 9-4. The shift motor 9-2 is preferably a servo motor.

The push plate assembly 5 includes a joint head 5-1, a bolt 5-3, and an active platen 5-5. The joint head 5-1 is disposed in the hollow shaft tube 2 and disposed coaxially with the hollow shaft tube 2. The front portion of the shift lever 6 is axially fixed relative to the joint head 5-1, but is movably connected in the circumferential direction. The active platen 5-5 is radially arranged with at least one pin 5-3, and the pin 5-3 is fixedly connected to the joint head 5-1 through an axially long slotted through hole provided in the hollow shaft tube 2. The side of the primary drive gear 3-1 of the low speed gear assembly 3 and the secondary drive gear 4-1 of the high speed gear assembly 4 are provided with friction plate elastic groups matched with the active platen 5-5. Item 20. The active platen 5-5 is uniformly distributed with elastic steel balls, cylindrical pins or tapered engaging teeth in the circumferential direction, the primary driving gear 3-1 of the low speed gear assembly 3 and the secondary driving gear 4 of the high speed gear assembly 4 1 In the circumferential direction, there is a matching hole for the steel ball or the cylindrical pin, or a tapered engaging tooth.

The shifting mechanism with the built-in dual clutch of the present embodiment can be used instead of the conventional synchronizer, which can shorten the axial distance of the automatic transmission and is suitable for shifting of more gear positions. Since the gears work independently, when the gear fails, the mechanical transmission of the built-in clutch is simple in structure and the number of parts is small. By configuring multiple identical shifting units, multiple gear shifting can be realized. The processing accuracy is not high, and the manufacturing cost is one-half of the current dual-clutch transmission. Due to the on-demand operation of the shifting motor 9-2, the transmission efficiency is increased by more than 10% compared to the existing dual clutch transmission.

The shifting mechanism of the built-in dual clutch of the embodiment adopts an exchange movement mode, and the precision of the machining is not high, and the control mode of the clutch switching is very simple, and only one small shifting motor 9-2 drives a shifting operation. Rod 6. To meet the required turning torque of various road conditions, the control algorithm is very simple, the active platen 5-5 is accurately reset by the shifting motor 9-2, so that the cost per machine is one-half of that of other automatic transmissions, and the maintenance is convenient and the cost is low. Manufacturing and maintenance environments are not demanding.

(Example 3)

3, the present embodiment is basically the same as Embodiment 1, except that the bearing positioning plate 10, the force locating disk 11, the front bearing 12, and the rear bearing 13 are further included.

The housing includes a front case 1-1, a middle case 1-2, and a rear case 1-3 which are disposed in order from the front to the rear. The front housing 1-1 is supported by the front bearing 12 at the front of the hollow shaft tube 2. The middle housing 1-2 is supported by the rear bearing 13 at the rear of the hollow shaft tube 2. The bearing positioning plate 10 is fixed to the middle casing 1-2. The shift execution gear 9-1 is supported by bearings on the bearing positioning plate 10 and the rear housing 1-3.

Both the front bearing 12 and the rear bearing 13 are deep groove bearings. Both the front end face of the front bearing 12 and the rear end face of the rear bearing 13 are axially constrained by the collar 14. A retaining washer 15 is disposed between the front bearing 12 and the low speed gear assembly 3, and between the rear bearing 13 and the high speed gear assembly 4.

The shift drive unit 9 includes a shift execution gear 9-1 and a motor (not shown) that drives the shift execution gear 9-1 to rotate.

The outer peripheral surface of the force receiving disk 11 is movably connected to the hollow shaft tube 2 in the circumferential direction, but the axial direction is relatively fixed. Specifically, two front and rear retaining rings 16 are mounted in the inner hole of the rear end of the hollow shaft tube 2. The outer peripheral surface of the force locating disc 11 is provided with a circumferential shoulder, the shoulder is located between the two retaining rings 16, and a plurality of first steel balls 17 are evenly arranged between the shoulder and the two retaining rings 16 or The first needle. The two retaining rings 16 in the inner bore of the hollow shaft tube 2 are each axially constrained by the collar 14.

The axial center of the force locating disk 11 is provided with an inner through hole, and the inner through hole is provided with a middle thread of the shift lever 6 Internal thread for connection. The internal thread in the inner through hole of the force aligning disk 11 and the external thread on the shift lever 6 fitted thereto are both T-shaped threads. The bearing positioning plate 10 is fixed to the housing, and the rear end portion of the clamping force receiving disk 11 restricts the circumferential rotation of the force positioning disk 11. The shift execution gear 9-1 is supported by the bearing positioning plate 10 and the housing 1 through bearings.

The rear portion of the shift lever 6 is axially movably coupled to the rotational shift executing gear 9-1, but the circumferential direction is relatively fixed. Specifically, the rear end portion of the shift lever 6 passes through the ball key groove 6-1 or the flat key groove. The shift execution gear 9-1 is connected. .

The working principle of the shifting mechanism with the built-in dual clutch of the present embodiment is that the low speed gear assembly 3 and the high speed gear assembly 4 are idly rotated only on the input shaft hollow shaft tube 2 without external force, and there is no energy transfer. The low speed gear assembly 3 and the high speed gear assembly 4 follow the hollow shaft tube 2 to rotate synchronously. Under the action of the shift operating lever 6, the pushing plate assembly 5 can reciprocate in the axial direction of the hollow shaft tube 2, according to The driving request is selected to be pressed to the low speed gear assembly 3 or to the high speed gear assembly 4 to complete the speed change shift.

The shifting execution gear 9-1 drives the shifting lever 6 to rotate by the ball key groove 6-1 or the flat key groove. Since the force locating disk 11 is restricted from being rotated circumferentially by the bearing positioning plate 10, the shifting operation is performed under the action of the T-shaped thread. The lever 6 pushes the low speed assembly 3 forward or pushes the high speed assembly 4 backward according to the shift command, thereby achieving the shifting purpose. Both the action of the pressing force and the reaction force during the shifting act on the hollow shaft tube 2.

(Example 4)

4, the embodiment is basically the same as the embodiment 3, except that the portion of the hollow shaft tube 2 that cooperates with the rear bearing 13 is uniformly provided with a through hole in the circumferential direction, and the second steel ball 18 or the second portion is placed in the through hole. Two needle rollers. The outer circumferential surface of the force locating disk 11 is provided with a semicircular ball groove, and the second steel ball 18 or the second needle roller rolls in the semicircular ball groove.

A spacer 19 is also placed in the through hole of the hollow shaft tube 2. The height block 19 is located between the rear bearing 13 and the second steel ball 18 or the second needle.

(Example 5)

This embodiment is basically the same as Embodiment 1, except that the output shaft 7 is a hollow tube. The push plate assembly 5 is axially movably coupled to the output shaft 7, but is circumferentially relatively fixed. The input ends of the low speed gear assembly 3 and the high speed gear assembly 4 are fixed to the hollow shaft tube 2. The output ends of the low speed gear assembly 3 and the high speed gear assembly 4 are sleeved on the output shaft 7, and are respectively located on the front and rear sides of the pressing plate assembly 5. The center of the pusher disc assembly 5 and the shift lever 6 are both disposed in the inner bore of the output shaft 7. The front portion of the shift lever 6 is relatively fixed to the center axial direction of the push plate assembly 5, but is movably connected in the circumferential direction. The input of the differential 8 is fixed to the output shaft 7.

The specific embodiments described above further detail the object, technical solution and beneficial effects of the present invention. It should be understood that the foregoing is only illustrative of specific embodiments of the invention, and is not intended to limit the invention, any modifications, equivalents, improvements, etc. within the spirit and scope of the invention All should be included in the scope of protection of the present invention.

Claims

A shifting mechanism with a built-in dual clutch, comprising: a housing (1), a hollow shaft tube (2) disposed in the housing (1), a low speed assembly (3), a high speed assembly (4), Pushing the disc assembly (5), shifting lever (6), output shaft (7) and differential (8), and fixing to the housing (1) and driving the shift lever (6) to move back and forth Shift drive device (9); the hollow shaft tube (2) and the output shaft (7) are rotatably supported on the housing (1); the push plate assembly (5) and the hollow shaft tube (2) The axially movable connection, but the circumferential direction is relatively fixed; the input ends of the low speed gear assembly (3) and the high speed gear assembly (4) are sleeved on the hollow shaft tube (2) and respectively located on the pushing plate Front and rear sides of the assembly (5); the center of the pressing plate assembly (5) and the shift lever (6) are both disposed in the inner hole of the hollow shaft tube (2); the shift lever The front portion of (6) is relatively fixed to the center axial direction of the push plate assembly (5), but is circumferentially movably connected; the input end of the differential (8) and the low speed gear assembly (3) and the high gear The output of the assembly (4) is fixed to the output shaft (7).
A shifting mechanism with a built-in dual clutch according to claim 1, further comprising a bearing positioning plate (10) and a force receiving disk (11); said shift driving device (9) including a shifting execution gear ( 9-1) and the motor, the motor drives the shifting execution gear (9-1) to rotate; the outer peripheral surface of the force receiving disc (11) is movably connected to the hollow shaft tube (2) circumferentially, but the axial direction is relatively fixed; The axial center of the force-receiving disc (11) is provided with an inner through hole, and the inner through hole is provided with an internal thread which is screwed to the middle of the shift lever (6); the bearing positioning plate (10) is fixed On the housing, and clamping the rear end portion of the force locating disc (11) to restrict the circumferential rotation of the force locating disc (11); the shift executing gear (9-1) is supported by the bearing locating plate through the bearing ( 10) and the housing (1); the rear portion of the shift lever (6) is axially movably coupled to the rotational shifting execution gear (9-1), but is circumferentially relatively fixed.
A shifting mechanism with a built-in dual clutch according to claim 2, further comprising a front bearing (12) and a rear bearing (13); said housing including a front housing (1-1) arranged in order from front to rear , a middle casing (1-2) and a rear casing (1-3); the front casing (1-1) is supported by a front bearing (12) at a front portion of the hollow shaft pipe (2); The middle casing (1-2) is supported by the rear bearing (13) at the rear of the hollow shaft tube (2); the bearing positioning plate (10) is fixed to the middle casing (1-2); The actuator gear (9-1) is supported by bearings on the bearing positioning plate (10) and the rear housing (1-3).
A shifting mechanism with a built-in dual clutch according to claim 2, characterized in that the front portion of the shift lever (6) is connected to the pusher disc assembly (5) by two bearings.
The shifting mechanism with built-in dual clutch according to claim 2, characterized in that the internal thread in the inner through hole of the force receiving disc (11) and the shift lever (6) engaged therewith The threads are all T-shaped threads.
A shifting mechanism with a built-in dual clutch according to claim 2, wherein said shifting operation The rear end portion of the rod (6) is coupled to the shift execution gear (9-1) through a ball key groove (6-1) or a flat key groove.
A shifting mechanism with a built-in dual clutch according to claim 2, wherein said front bearing (12) and rear bearing (13) are deep groove bearings; front end face and rear bearing of said front bearing (12) The rear end faces of (13) are each limited in axial position by a collar (14); between the front bearing (12) and the low speed assembly (3), and the rear bearing (13) and the high speed assembly (4) A retaining washer (15) is provided between them.
The shifting mechanism with a built-in dual clutch according to claim 2, wherein two front and rear retaining rings (16) are mounted in the inner hole of the rear end of the hollow shaft tube (2); a circumferential shoulder is provided on the outer peripheral surface, the shoulder is located between the two retaining rings (16), and a plurality of first steel balls are evenly arranged between the shoulder and the two retaining rings (16) (17) ) or the first needle.
The shifting mechanism with built-in dual clutch according to claim 8, characterized in that the two retaining rings (16) in the inner bore of the hollow shaft tube (2) are each limited in axial position by a collar (14).
The shifting mechanism with a built-in dual clutch according to claim 2, wherein a portion of the hollow shaft tube (2) that cooperates with the rear bearing (13) is uniformly provided with a through hole in a circumferential direction, and a second portion is disposed in the through hole. a steel ball (18) or a second needle; the outer circumferential surface of the force receiving disk (11) is provided with a semicircular ball groove, and the second steel ball (18) or the second needle roller rolls in the semicircular ball groove.
The shifting mechanism with a built-in dual clutch according to claim 10, characterized in that: a height block (19) is placed in the through hole of the hollow shaft tube (2); the height block (19) is located behind The bearing (13) is between the second steel ball (18) or the second needle.
A shifting mechanism with a built-in dual clutch according to claim 1, wherein said low speed gear assembly (3) includes a primary drive gear (3-1) and a primary driven gear (3-2) that mesh with each other. The high speed gear assembly (4) includes a two-stage driving gear (4-1) and a secondary driven gear (4-2) that mesh with each other; the primary driving gear (3-1) and the second stage The driving gear (4-1) is sleeved on the hollow shaft tube (2); the primary driven gear (3-2) and the secondary driven gear (4-2) are fixed to the output shaft (7).
A shifting mechanism with a built-in dual clutch according to claim 1, wherein said pressing plate assembly (5) comprises a joint head (5-1), an intermediate turning hub (5-2), and a latch (5). -3), a friction plate (5-4) and a pressure plate; the joint head (5-1) is disposed in the hollow shaft tube (2) and disposed coaxially with the hollow shaft tube (2); The front portion of the joystick (6) is axially fixed relative to the joint head (5-1), but is circumferentially movably connected; at least one latch (5-3) is arranged radially of the intermediate hub disk (5-2) The bolt (5-3) is fixedly connected to the joint head (5-1) through an axial long groove through hole provided in the hollow shaft tube (2); the intermediate hub disk (5-2) is provided with a plurality of friction plates (5-4) and a pressure plate; a primary drive gear (3-1) of the low speed gear assembly (3) and a secondary drive gear (4-1) of the high speed gear assembly (4) The sides are provided with a toothed internal toothed hub that cooperates with the friction plate (5-4).
A shifting mechanism with a built-in dual clutch according to claim 13, wherein said shifting operation The front portion of the longitudinal rod (6) is connected to the joint head (5-1) of the pressing disc assembly (5) by a deep groove bearing; the rear portion of the shift operating lever (6) is supported by an axial linear sliding bearing On the housing (1).
A shifting mechanism with a built-in dual clutch according to claim 13, wherein said shift driving device (9) comprises a shifting motor (9-2), a screw rod and a swing lever (9-3); The screw rod is fixed on the output shaft of the shift motor (9-2); one end of the swing rod (9-3) is screwed to the screw rod, and the other end is hinged to the housing (1); the swing rod (9) The middle portion of -3) is provided with a slot that is slidably coupled to the tail of the shift lever (6).
The shifting mechanism with a built-in dual clutch according to claim 13, wherein the friction plate (5-4) of the pressing plate assembly (5) operates in oil lubrication; the low speed gear assembly ( The primary drive gear (3-1) of the 3) and the secondary drive gear (4-1) of the high-speed gear assembly (4) are welded integrally or splined with the internal gear hub.
A shifting mechanism with a built-in dual clutch according to claim 12, characterized in that: the primary drive gear (3-1) of the low speed gear assembly (3) and the secondary drive gear of the high speed gear assembly (4) (4-1) are supported on the hollow shaft tube (2) by bearings.
The shifting mechanism with built-in dual clutch according to claim 12, characterized in that the pressing disc assembly (5) comprises a joint head (5-1), a bolt (5-3) and an active platen (5- 5); the joint head (5-1) is disposed in the hollow shaft tube (2) and disposed coaxially with the hollow shaft tube (2); the front portion and the joint head of the shift lever (6) 5-1) axially fixed, but circumferentially movable; the active platen (5-5) is radially arranged with at least one pin (5-3), and the pin (5-3) is passed through the hollow shaft The axial long groove through hole on the tube (2) is fixedly connected with the joint head (5-1); the first stage driving gear (3-1) and the high speed gear assembly (4) of the low speed gear assembly (3) The side surface of the secondary driving gear (4-1) is provided with a friction plate elastic assembly (20) matched with the active pressure plate (5-5); the active pressure plate (5-5) is circumferentially Cloth elastic steel ball, cylindrical pin or tapered joint tooth, low-speed gear assembly (3) primary drive gear (3-1) and high-speed gear assembly (4) secondary drive gear (4-1) on the circumference The direction is provided with a matching hole for a steel ball or a cylindrical pin, or a tapered engaging tooth.
A shifting mechanism with a built-in dual clutch according to claim 18, wherein said shift driving device (9) includes a shifting motor (9-2) and a screw rod (9-4); said screw rod ( 9-4) is fixed to the output shaft of the shift motor (9-2); the tail of the shift lever (6) is screwed to the screw rod (9-4).
A shifting mechanism with a built-in dual clutch according to claim 18, further comprising a guide rail (21); said guide rail (21) being fixed to the housing (1); said shift lever (6) and The guide rail (21) is slidably connected.
The shifting mechanism with a built-in dual clutch according to any one of claims 1 to 20, characterized in that: the output shaft (7) is a hollow tube; the pressing disc assembly (5) and the output shaft (7) shaft Connecting to the movable, but relatively circumferentially fixed; the input ends of the low speed assembly (3) and the high speed assembly (4) are fixed on the hollow shaft tube (2); The output ends of the low speed gear assembly (3) and the high speed gear assembly (4) are sleeved on the output shaft (7) and respectively located on the front and rear sides of the pressing plate assembly (5); The center of the platen assembly (5) and the shift lever (6) are both disposed in the inner hole of the output shaft (7); the front portion of the shift lever (6) and the push plate assembly (5) The central axis is relatively fixed but is circumferentially movably connected; the input of the differential (8) is fixed to the output shaft (7).