CN110925329A

CN110925329A - Spiral bidirectional overrunning clutch and high-power automatic speed change system

Info

Publication number: CN110925329A
Application number: CN201911422569.6A
Authority: CN
Inventors: 傅元才; 刘洪�
Original assignee: Chongqing Feichong Tianji Electric Technology Co Ltd
Current assignee: Chongqing Feichong Tianji Electric Technology Co Ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-03-27

Abstract

The invention discloses a spiral bidirectional overrunning clutch and a high-power automatic speed change system, wherein the clutch comprises a one-way anti-rotation component, a spiral spline synchronous sleeve and a control ring with a control handle, wherein the control ring elastically surrounds the synchronous sleeve and is in friction connection with the synchronous sleeve; the one-way anti-rotation component is arranged through the static component and comprises a movable stop block, the movable stop block is hinged on the static component, and a one-way limiting structure is formed by a torsion spring and a limiting block; the axis of the articulated shaft is parallel to the axis of the synchronous sleeve; the movable stop block rotates outwards to form a space for avoiding the control handle; the movable stop block is prevented from rotating inwards by the limiting block. The system has two power input modes of a shaft and a gear and comprises the clutch. The clutch has the advantages of high forward and reverse rotation switching response speed, good reliability and low noise in forward and reverse rotation high-speed operation. The speed change system has the same beneficial effects as the spiral bidirectional overrunning clutch, and is small in structural size, compact in layout and beneficial to layout of the whole vehicle.

Description

Spiral bidirectional overrunning clutch and high-power automatic speed change system

Technical Field

The invention relates to a speed change device for a vehicle, in particular to a spiral bidirectional overrunning clutch and a high-power automatic speed change system.

Background

The helical spline synchronous sleeve of the helical bidirectional overrunning clutch forms the combination of a low-speed state and the overrunning of a high-speed state through the elastic element and the ratchet-shaped jaw clutch structure; the switching between the forward rotation and the reverse rotation is realized by the mode of applying friction resistance by the braking device and the spiral structure. The high-power speed change system is simple in structure, compact in layout, strong in load capacity, long in service life and particularly suitable for high-power speed change systems. The braking device enables the braking ring elastically clamped on the helical spline synchronous sleeve to rotate only along with the synchronous sleeve according to a set direction through the one-way anti-rotation component, so that when the braking ring is limited to rotate, the helical spline synchronous sleeve moves reversely by utilizing the reverse rotation of the driving component and then is combined with another component, and the purpose of reverse power transmission is achieved. However, the existing one-way anti-rotation component is of an up-and-down turning structure, when the helical spline synchronous sleeve rotates forwards, the control handle extending radially on the brake ring presses the one-way anti-rotation component downwards to enable the component to swing downwards, and then the component slides over the one-way anti-rotation component; when the helical spline synchronous sleeve rotates reversely, the control handle pushes the one-way anti-rotation component to turn up, and the one-way anti-rotation component forms a barrier to the rotation of the brake ring, so that the brake ring is prevented from rotating. However, when the structure is used for a period of time, after the control handle or the one-way anti-rotation component is subjected to friction wear to a certain degree, and the helical spline synchronous sleeve rotates reversely, the brake ring easily slides over the one-way anti-rotation component, so that the anti-rotation failure hidden danger that the anti-rotation component cannot prevent the brake ring from rotating exists, and the anti-rotation reliability is poor; the brake ring may not be blocked until it has slipped several times, which, when applied to a vehicle, results in a long vehicle reverse response time and even a failure of the reverse function. In addition, because the clutch structure adopts a ratchet-shaped jaw clutch structure, in an overrunning state, two separated components rotate mutually, and the tooth tops of the two separated components intermittently contact under the action of the elastic element, so that the 'click-click' collision noise is generated. For this reason, further improvement is required.

Disclosure of Invention

The first purpose of the invention is to provide a spiral bidirectional overrunning clutch, aiming at the defects of poor one-way anti-rotation reliability and even failure of the existing spiral bidirectional overrunning clutch, the clutch is used for providing radial space required by the rotation of a brake ring by arranging the rotating shaft line of a one-way anti-rotation component of a braking device in a direction parallel to the axis line of a spiral spline synchronous sleeve so as to rotate outwards when being pushed forwards and rotate inwards when being pushed backwards, thus forming the prevention of the rotation of the brake ring. The reliability is improved by arranging the double anti-rotation structure; and the tooth tops of the two metal ratchets are prevented from being directly contacted when exceeding by a mode of embedding the buffer ring on the passive ratchets, so that the noise is eliminated. It is a second object of the present invention to provide a transmission system having the aforementioned helical bi-directional overrunning clutch.

In order to achieve the first object, the invention adopts the following technical scheme.

A spiral bidirectional overrunning clutch comprises a one-way anti-rotation component, a spiral spline synchronous sleeve and a control ring with a control handle, wherein the control ring elastically surrounds the spiral spline synchronous sleeve through an annular groove on the spiral spline synchronous sleeve and forms a friction connection relation with the spiral spline synchronous sleeve; the one-way anti-rotation component is arranged through the static component and comprises a movable stop block, the movable stop block is hinged on the static component through a hinge shaft, and a one-way limiting structure is formed through a torsion spring and a limiting block; the axis of the articulated shaft is parallel to the axis of the helical spline synchronous sleeve; the movable stop block rotates outwards to form a space for avoiding the control handle; the movable stop block is prevented from rotating inwards by the limiting block, and then the control ring is prevented from rotating.

According to the clutch adopting the technical scheme, the movable stop block is abutted against the limiting block under the action of the elastic force of the torsion spring, and the reverse rotation of the movable stop block is prevented by the limiting block. When the helical spline synchronous sleeve rotates forwards, the control ring pushes the front face of the movable stop block to overcome the elastic force of the torsion spring through the control handle to rotate outwards to form a space for avoiding the control handle, and the corresponding control ring synchronously rotates along with the helical spline synchronous sleeve; when the helical spline synchronous sleeve rotates reversely, the control handle of the control ring rapidly abuts against the upper back face of the movable stop dog in a circle of reverse rotation, the movable stop dog stops the control ring from rotating through the control handle, frictional resistance is formed between the control ring and the helical spline synchronous sleeve, under the action of a helical spline matching structure of the helical spline synchronous sleeve, the helical spline synchronous sleeve axially moves and rapidly combines with a component for reverse power transmission to form reverse power transmission, and when the helical spline synchronous sleeve is used for a vehicle, a reversing function can be realized. Because the control ring does not leave the movable stop block in height when rotating forward and backward, the movable stop block only needs to rotate outwards to form avoidance when rotating forward and is blocked quickly when rotating backward, the reliability is obviously improved, the radial size is reduced only by a very small amount when the control ring is worn in time, the reduction can not influence the blocked reliability, and the service life is long.

Preferably, the stationary member is provided with two one-way rotation-preventing members. Through setting up dual function component, further improve the reliability, simultaneously, the control handle of control ring can be blockked in the semi-cycle scope of reverse rotation, improves corresponding speed.

Preferably, the driving device further comprises a first driven member which can form overrunning with the helical spline synchronous sleeve, and the first driven member is provided with embedded teeth which are combined with the helical spline synchronous sleeve; the first driven member comprises a first driven member body and a buffer body embedded on the first driven member body; the part of the embedded tooth is formed on the first driven piece body, the other part of the embedded tooth is formed on the buffer body, and the part formed on the buffer body is 0.3-0.4 mm higher than the part formed on the first driven piece body. When the spiral spline synchronous sleeve and the first driven member are prevented from overrunning through the buffer body, metal tooth tops of the ratchets are contacted and collided with each other, and accordingly noise in an overrunning state is effectively eliminated.

Preferably, the gear shifting device further comprises a driving part which is rotatably sleeved on the gear shifting shaft and forms low-speed gear power connection, and the driving part is provided with a disk-shaped body part and a journal part; the shaft neck of the driving part is connected with the spiral spline synchronous sleeve through a spiral spline structure; the first driven member is fixedly connected with the gear shifting shaft and is positioned outside the disc body end of the driving member; a plurality of engaging claws are formed on the end surface of the spiral spline synchronous sleeve close to the disc-shaped body, and the engaging claws can extend out of a hollow-out part arranged on the disc-shaped body; the helical spline synchronous sleeve and the first driven member form a first one-way jaw clutch structure through the meshing claw; the gear shifting shaft is also fixedly connected with a second driven part, the second driven part is positioned outside the shaft neck end of the driving part, a second one-way jaw clutch structure is formed between the helical spline synchronous sleeve and the second driven part, and a first elastic element is arranged between the helical spline synchronous sleeve and the second driven part, so that the first one-way jaw clutch forms a normally closed structure, and the second one-way jaw clutch forms a normally open structure; the gear shifting shaft is also provided with a high-speed gear power access component, and the high-speed gear power access structure is used for driving the gear shifting shaft to rotate forwards at a high speed; when the positive rotating force of the low-speed gear is switched on, the first one-way jaw clutch is in an engaged state, the second one-way jaw clutch is separated, and the gear shifting shaft rotates forwards at a low speed; when the positive rotating force of the high-speed gear is connected, the first one-way jaw clutch is in an overrunning state, the second one-way jaw clutch is separated, and the gear shifting shaft rotates positively at a high speed; when the reverse power is accessed by the driving part, the first one-way jaw clutch is separated, the second one-way jaw clutch is combined, and the gear shifting shaft reversely rotates at a low speed. So as to form a spiral bidirectional overrunning clutch with a complete structure, and can be conveniently used for a vehicle gearbox.

In order to achieve the second object, the invention adopts the following technical scheme.

A high-power automatic speed-changing system comprises a driving shaft, a driven shaft and a spiral bidirectional overrunning clutch for realizing the first purpose; the driven shaft consists of the gear shifting shaft, an output gear is arranged on the driven shaft, and a differential is connected with the driven shaft through the output gear; wherein the static component is composed of a box body of the gearbox; a low-gear driving gear and a high-gear driving gear are arranged on the driving shaft; the driving part of the spiral bidirectional overrunning clutch is normally meshed with the low-speed gear driving gear; the high-speed gear power access component is of a gear structure and is normally meshed with the high-speed gear driving gear; and the gear shifting shaft is driven to rotate by an active part or a high-speed gear power access component in an alternative mode.

By adopting the automatic speed changing system adopting the technical scheme, two-gear speed changing is realized through a high-speed gear transmission structure and a low-speed gear transmission structure, a high-speed and low-speed and reverse-driving speed changing structure is realized through the spiral bidirectional overrunning clutch, a vehicle drive axle structure is formed through the differential mechanism, the running reliability, the high speed, the low noise and the quick response characteristic of reverse power output are improved through the high reliability and the low noise of an overrunning state of the spiral bidirectional overrunning clutch, the agility of vehicle reversing response is improved, and the service life is long. And the characteristic that the radial structure size of the spiral bidirectional overrunning clutch is small is utilized, the center distance between all levels of speed change power shafts in the speed change system can be reduced, the structural size of the gearbox is correspondingly reduced, and the compact layout is facilitated.

Preferably, the high-speed gear power access member and the first driven member of the spiral bidirectional overrunning clutch form an integral structure; the low-gear driving gear and the high-gear driving gear output power to the gear shifting shaft in an alternative mode. The structure compactness is improved through the integrated structure of the high-speed gear power access component and the first driven component, the size of the gearbox is convenient to reduce, and the vehicle layout is facilitated; the power input requirements of the spiral bidirectional overrunning clutch in three working states are met through the alternative output of the power of the low-gear driving gear and the power of the high-gear driving gear, and the reliable function is ensured.

Preferably, the low-gear driving gear is fixedly connected to the driving shaft, and the high-gear driving gear is sleeved on the driving shaft in an idle mode; the controllable overrunning clutch is arranged between the high-speed gear driving gear and the driving shaft, the controllable overrunning clutch is controlled in a clutch state by the combined action of pushing external force and the second elastic element, the driving shaft outputs power to the gear shifting shaft through the high-speed gear driving gear in a combined state, and the driving shaft outputs power to the gear shifting shaft through the low-speed gear driving gear in a separated state. The controllable overrunning clutch is a one-way clutch controlled by a control component in the prior art and comprises an inner sleeve structure form, an outer sleeve structure form and a jaw structure form. The jaw structure is provided with a synchronous sleeve, and the synchronous sleeve and the fixed component are meshed through one-way teeth to form the combination of a clutch; the synchronous sleeve is movably arranged, and the clutch control is realized by pushing the synchronous sleeve to move through the control component; the movable matching structure of the synchronous sleeve is usually a spline, and when the spline is in a spiral structure, the controllable one-way clutch forms a controllable one-way spiral clutch, so that the corresponding speed of combination and separation of the clutch can be increased, and the load capacity can be improved. Therefore, the controllable one-way clutch with the jaw structure has the characteristics of small radial size and strong load capacity. Normally, the engagement of the clutch is pushed by an external force, and the disengagement of the clutch is pushed by the elastic force of a spring-like elastic energy storage element. The pushing external force can utilize the electromagnetic coil to generate magnetic force to the synchronous sleeve serving as the magnetic conduction iron core to push, and can also pull the synchronous sleeve to move through the shifting fork and keep the jaw clutch of the synchronous sleeve to be combined or separated. The controllable overrunning clutch preferably adopts a controllable one-way spiral clutch, so that the characteristic of small radial structure size is further utilized, the center distance between all levels of speed change power shafts in the speed change system is reduced, the structural size of the gearbox is correspondingly reduced, and the compact layout is facilitated.

Preferably, the low-gear driving gear and the high-gear driving gear are both fixedly connected or integrally formed on the driving shaft; the high-speed gear power access component is composed of a high-speed gear driven gear, and the high-speed gear driven gear is sleeved on the gear shifting shaft in an empty mode; the high-speed gear driven gear and the gear shifting shaft are provided with controllable overrunning clutches, the controllable overrunning clutches are controlled in a clutch state under the combined action of pushing external force and the second elastic element, the gear shifting shaft synchronously rotates along with the high-speed gear driven gear in a combined state, and the gear shifting shaft synchronously rotates along with the first driven member in a separated state. The low-gear driving gear and the high-gear driving gear are fixedly connected or integrally formed on the driving shaft, so that the structure of the driving shaft serving as the driving shaft can be effectively simplified, and the manufacturing difficulty is reduced; correspondingly, the spiral one-way clutch and the spiral two-way clutch are arranged on the gear shifting shaft at the same time, so that centralized management and maintenance are facilitated.

Preferably, one end of the driving shaft is connected with a power input motor through a spline matching structure; or the driving shaft is connected with a power input motor through a primary gear transmission structure, and in the scheme that the high-speed gear driving gear is fixedly connected or integrally formed on the driving shaft, the high-speed gear driving gear forms a driven gear of the primary gear transmission structure. One end of the driving shaft is connected with a power input motor through a spline matching structure, so that the structural compactness can be further improved; the scheme that the driving shaft is connected with the power input motor through the primary gear transmission structure can reduce the speed and increase the torque by increasing the primary gear transmission structure, the load capacity is improved, the gearbox is suitable for a gearbox with higher power, the driven gear of the primary gear transmission structure is formed by the high-speed gear driving gear, the number of components can be reduced, and the manufacturing cost is reduced.

Further preferably, the braking external force is formed by electromagnetic force generated by an electromagnetic coil; the electromagnetic coil is controlled according to the rotating speed signal. The electromagnetic force is used as the braking force, so that automatic control can be realized; when the rotating speed of the detected shaft is higher than a certain set value, the control system enables the electromagnetic coil to be electrified to generate electromagnetic force, and switching from a low gear to a high gear is realized; when the rotating speed of the detected shaft is lower than a certain set value, the control system enables the electromagnetic coil to be lost, the electromagnetic force disappears, and switching from a high-speed gear to a low-speed gear is achieved.

The invention has the advantages that when the spiral bidirectional overrunning clutch is switched to reverse rotation, the response speed is high, the reliability is good, and the noise of the forward rotation high-speed operation is low. The speed change system has the same beneficial effects as the spiral bidirectional overrunning clutch, and is small in structural size, compact in layout and beneficial to layout of the whole vehicle.

Drawings

FIG. 1 is a schematic structural diagram of a helical bi-directional overrunning clutch according to the present invention.

FIG. 2 is a partially schematic isometric view of a first driven member of the helical bi-directional overrunning clutch of the present invention.

FIG. 3 is a schematic perspective view showing the structure of the spiral overrunning clutch in the normal rotation state.

FIG. 4 is a schematic perspective view of the reverse rotation state of the helical bi-directional overrunning clutch of the present invention.

Fig. 5 is a schematic configuration diagram of a first arrangement of the automatic transmission system of the present invention.

Fig. 6 is an enlarged view of the portion a of fig. 5 according to the present invention.

Fig. 7 is a schematic configuration diagram of a second layout form of the automatic transmission system of the present invention.

Fig. 8 is an enlarged view of the portion B of fig. 5 according to the present invention.

Detailed Description

The present invention is further described with reference to the accompanying drawings, but the invention is not limited thereby within the scope of the described embodiments.

Embodiment 1, refer to fig. 1, fig. 2, fig. 3, fig. 4, a helical bidirectional overrunning clutch, comprising a one-way rotation-preventing member, a helical spline synchronizing sleeve 1 and a control ring 2 having a control handle 2a, wherein the control ring 2 elastically surrounds the helical spline synchronizing sleeve 1 through an annular groove on the helical spline synchronizing sleeve 1 and forms a frictional connection with the helical spline synchronizing sleeve 1; the one-way anti-rotation component is arranged through a static component 12 and comprises a movable stop block 3, the movable stop block 3 is hinged on the static component 12 through a hinge shaft 11, and a one-way limiting structure is formed through a torsion spring 4 and a limiting block 5; the axis of the articulated shaft 11 is parallel to the axis of the helical spline synchronous sleeve 1; the movable stop block 3 rotates outwards to form a space for avoiding the control handle 2 a; the movable stop 3 is prevented from rotating inwards by the limiting block 5, so that the control ring 2 is prevented from rotating; and two of the one-way rotation-preventing members are provided on the stationary member 12. The hinge shaft 11 is of a step bolt structure, is screwed and fixed with the static component 12 through a screw rod part at the front end, a cylindrical section is arranged between the screw rod part and the screw rod, the length of the cylindrical section is larger than the thickness of the hinge hole part of the movable stop block 3, and the hinge shaft 11 is in hinge connection with the hinge hole of the movable stop block 3 in a shaft hole matching mode through the cylindrical section.

The first driven member 6 can form overrunning with the helical spline synchronous sleeve 1, and the first driven member 6 is provided with embedded teeth which are combined with the helical spline synchronous sleeve 1; the first driven member 6 comprises a first follower body 6a and a damper body 6b fitted to the first follower body 6 a; the engaging teeth are formed partially on the first follower body 6a and partially on the damper body 6b, and the portion formed on the damper body 6b is higher than the portion formed on the first follower body 6a by 0.3 to 0.4 mm.

The gear shifting mechanism further comprises a driving part 8 which is rotatably sleeved on the gear shifting shaft 7 and forms low-speed gear power access, and the driving part 8 is provided with a disk-shaped part and a journal part; the shaft neck of the driving part 8 is connected with the helical spline synchronous sleeve 1 through a helical spline structure; the first driven member 6 is fixedly connected with the gear shifting shaft 7, and the first driven member 6 is positioned outside the disc body end of the driving piece 8; a plurality of engaging claws 1a are formed on the end surface of the spiral spline synchronous sleeve 1 close to the disc-shaped body, and the engaging claws 1a can extend out of a hollow part arranged on the disc-shaped body; the helical spline synchronous sleeve 1 and the first driven member 6 form a first one-way jaw clutch structure through the meshing claw 1 a; the gear shifting shaft 7 is also fixedly connected with a second driven part 9, the second driven part 9 is positioned outside the shaft neck end of the driving part 8, a second one-way jaw clutch structure is formed between the helical spline synchronous sleeve 1 and the second driven part 9, and a first elastic element 10 is arranged between the helical spline synchronous sleeve and the second driven part 9, so that the first one-way jaw clutch forms a normally closed structure, and the second one-way jaw clutch forms a normally open structure; the gear shifting shaft 7 is also provided with a high-speed gear power access component, and the high-speed gear power access component is used for driving the gear shifting shaft 7 to rotate forwards at a high speed; when the low-speed gear positive rotating force is connected, the first one-way jaw clutch is in a combined state, the second one-way jaw clutch is separated, and the gear shifting shaft 7 rotates forwards at a low speed; when the positive rotating force of the high-speed gear is connected, the first one-way jaw clutch is in an overrunning state, the second one-way jaw clutch is separated, and the gear shifting shaft 7 rotates forwards at a high speed; when the reverse power is engaged by the driving element 8, the first one-way dog clutch is disengaged, the second one-way dog clutch is engaged, and the shift shaft 7 is reversed at a low speed.

Embodiment 2, see fig. 5, in combination with fig. 1, 2, 3, 4, a high-power automatic transmission system includes a driving shaft 13, a driven shaft, and the spiral bidirectional overrunning clutch of embodiment 1; one end of the driving shaft 13 is connected with a power input motor 16 through a spline matching structure; the driven shaft is composed of the gear shifting shaft 7, an output gear 14 is arranged on the driven shaft, and a differential 15 is connected with the driven shaft through the output gear 14; wherein the stationary member 12 is constituted by the casing of the gearbox; a low-gear driving gear 17 and a high-gear driving gear 18 are arranged on the driving shaft 13; the driving part 8 of the spiral bidirectional overrunning clutch is normally meshed with the low-speed gear driving gear 17; the high-speed gear power access component is of a gear structure and is constantly meshed with the high-speed gear driving gear 18; and the gear shift shaft 7 is driven to rotate by the driving piece 8 or a high-speed gear power access component in an alternative mode.

Wherein the high-speed gear power access component and the first driven component 6 of the spiral bidirectional overrunning clutch form an integral structure; the low-gear driving gear 17 and the high-gear driving gear 18 output power to the shift shaft 7 in an alternative mode; the low-gear driving gear 17 is fixedly connected to the driving shaft 13, and the high-gear driving gear 18 is sleeved on the driving shaft 13 in an empty mode; a controllable overrunning clutch composed of a controllable one-way spiral clutch is arranged between the high-speed gear driving gear 18 and the driving shaft 13, the controllable overrunning clutch is controlled in a clutch state by the combined action of pushing external force and the second elastic element 19, the driving shaft 13 outputs power to the gear shifting shaft 7 through the high-speed gear driving gear 18 in a combined state, and the driving shaft 13 outputs power to the gear shifting shaft 7 through the low-speed gear driving gear 17 in a separated state. The pushing external force is formed by electromagnetic force generated by the electromagnetic coil 20; the electromagnetic coil 20 is controlled according to a rotation speed signal of the shift shaft 7 detected by the hall element 21, and the hall element 21 obtains the rotation speed signal of the shift shaft 7 through the magnet 24 fixed on the second driven member 9. The structure of the controllable overrunning clutch is disclosed in chinese patent publication No. CN205173288U, the one-way overrunning clutch structure disclosed on 2015, 12, month and 02, and the one-way overrunning clutch in the two-gear transmission system.

Referring to fig. 6, the controllable overrunning clutch comprises a one-way spiral spline coupling sleeve 25, a coupling 26 and a loading spring 27, wherein the one-way spiral spline coupling sleeve 25 is connected with the driving shaft 13 through a spiral spline matching structure; the second elastic element 19 is arranged through an inner step, and the other end of the second elastic element 19 is abutted against the shaft shoulder of the driving shaft 13; the combiner 26 is connected with the shaft neck of the high-speed gear driving gear 18 through a spiral spline matching structure; the loading spring 27 is arranged between the opposite end surfaces of the high-speed gear driving gear 18 and the combiner 26; ratchets are arranged between the opposite end surfaces of the one-way spiral spline coupling sleeve 25 and the coupling 26. The electromagnetic coil 20 and the one-way spiral spline combination sleeve 25 form an electromagnet structure, the one-way spiral spline combination sleeve 25 forms an iron core of the electromagnet, the one-way characteristic of the ratchet is utilized, when the electromagnetic coil 20 is electrified, the one-way spiral spline combination sleeve 25 is combined with the combiner 26, and the driving shaft 13 drives the high-speed gear driving gear 18 to rotate through the controllable overrunning clutch, so that high-speed gear power output is formed. When the driving shaft 13 rotates reversely, the clutch is in an overrunning state, and the driving shaft 13 and the high-speed gear driving gear 18 rotate relatively.

The rest of the structure of this embodiment is the same as embodiment 1, and is not described herein again.

In the embodiment, in the controllable one-way spiral clutch, the external force for pushing can also be used for shifting the synchronous sleeve to move through the shifting fork and keeping the jaw clutch combined or separated.

Referring to fig. 7, in the present embodiment, the driving shaft 13 may be connected to a power input motor 16 through a primary gear transmission structure, and the load capacity may be improved by increasing the primary gear transmission structure to reduce the speed and increase the torque. Wherein, the output shaft of the power input motor 16 is provided with a first-level driving gear 23, and the first-level driving gear 23 is meshed with the high-speed gear driving gear 18.

In the embodiment 3, referring to fig. 7 in combination with fig. 1, 2, 3, 4 and 5, the driving shaft 13 is connected with a power input motor 16 through a primary gear transmission structure, and the high-speed gear driving gear 18 forms a driven gear of the primary gear transmission structure. The low-gear driving gear 17 and the high-gear driving gear 18 are both fixedly connected or integrally formed on the driving shaft 13; the high-speed gear power access component is composed of a high-speed gear driven gear 22, and the high-speed gear driven gear 22 is sleeved on the gear shifting shaft 7 in an empty mode; the high-speed gear driven gear 22 and the gear shifting shaft 7 are provided with controllable overrunning clutches, the controllable overrunning clutches are controlled in a clutch state by the combined action of pushing external force and the second elastic element 19, in a combined state, the gear shifting shaft 7 synchronously rotates along with the high-speed gear driven gear 22, and in a separated state, the gear shifting shaft 7 synchronously rotates along with the first driven member 6. Wherein, the output shaft of the power input motor 16 is provided with a first-level driving gear 23, and the first-level driving gear 23 is meshed with the high-speed gear driving gear 18.

Referring to fig. 8, the controllable overrunning clutch comprises a one-way spiral spline coupling sleeve 25, a coupling 26 and a loading spring 27, wherein the one-way spiral spline coupling sleeve 25 is connected with the shift shaft 7 through a spiral spline matching structure; the second elastic element 19 is arranged through an inner step, and the other end of the second elastic element 19 abuts against a shaft shoulder of the gear shifting shaft 7; the coupling 26 is connected with the shaft neck of the high-speed gear driven gear 22 through a spiral spline matching structure; the loading spring 27 is arranged between the inner step of the high-speed gear driven gear 22 and the opposite end surface of the combiner 26; ratchets are arranged between the opposite end surfaces of the one-way spiral spline coupling sleeve 25 and the coupling 26. The electromagnetic coil 20 and the one-way spiral spline combination sleeve 25 form an electromagnet structure, the one-way spiral spline combination sleeve 25 forms an iron core of the electromagnet, the one-way characteristic of the ratchet is utilized, when the electromagnetic coil 20 is electrified, the one-way spiral spline combination sleeve 25 is combined with the combiner 26, and the high-speed gear driven gear 22 drives the gear shifting shaft 7 to synchronously rotate at high speed through the controllable overrunning clutch, so that high-speed gear power transmission is formed. When the main shaft 13 rotates in the reverse direction, the high-speed driven gear 22 rotates in the reverse direction, the clutch is in an overrunning state, and the shift shaft 7 and the high-speed driven gear 22 rotate relatively.

The rest of the structure of this embodiment is the same as embodiment 2, and is not described herein again.

Referring to fig. 5, in this embodiment, a scheme that one end of the driving shaft 13 is connected to the power input motor 16 through a spline fitting structure may also be adopted, so as to omit a first-stage speed reduction structure, and achieve the purpose of simplifying and compacting the structure.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A spiral bidirectional overrunning clutch comprises a one-way anti-rotation component, a spiral spline synchronous sleeve (1) and a control ring (2) with a control handle (2a), wherein the control ring (2) elastically encircles the spiral spline synchronous sleeve (1) through an annular groove on the spiral spline synchronous sleeve (1) and forms a friction connection relation with the spiral spline synchronous sleeve (1); the one-way anti-rotation component is arranged through the static component (12), the one-way anti-rotation component comprises a movable stop block (3), the movable stop block (3) is hinged on the static component (12) through a hinge shaft (11), and a one-way limiting structure is formed through a torsion spring (4) and a limiting block (5); the device is characterized in that the axis of the hinge shaft (11) is parallel to the axis of the helical spline synchronous sleeve (1); the movable stop block (3) rotates outwards to form a space for avoiding the control handle (2 a); the movable stop block (3) is prevented from rotating inwards by the limiting block (5), and then the control ring (2) is prevented from rotating.

2. The helical bi-directional overrunning clutch according to claim 1, wherein two of said one-way rotation preventing members are provided on said stationary member (12).

3. The helical bi-directional overrunning clutch according to claim 1, further comprising a first driven member (6) capable of overrunning with the helically splined synchronizing sleeve (1), wherein the first driven member (6) has engaging teeth for engaging with the helically splined synchronizing sleeve (1); the first driven member (6) comprises a first driven member body (6a) and a buffer body (6b) fitted to the first driven member body (6 a); the engaging teeth are formed partially on the first follower body (6a) and partially on the cushion body (6b), and the portion formed on the cushion body (6b) is higher than the portion formed on the first follower body (6a) by 0.3 to 0.4 mm.

4. The helical bi-directional overrunning clutch according to claim 3, further comprising a driving member (8) rotatably mounted on the shift shaft (7) and forming a low-speed power input, wherein the driving member (8) has a disk-shaped body portion and a journal portion; the shaft neck of the driving part (8) is connected with the spiral spline synchronous sleeve (1) through a spiral spline structure; the first driven member (6) is fixedly connected with the gear shifting shaft (7), and the first driven member (6) is positioned outside the disc body end of the driving piece (8); a plurality of engaging claws (1a) are formed on the end surface of the spiral spline synchronous sleeve (1) close to the disc-shaped body, and the engaging claws (1a) can extend out of a hollow part arranged on the disc-shaped body; the helical spline synchronous sleeve (1) and the first driven member (6) form a first one-way jaw clutch structure through the meshing claw (1 a); the gear shifting shaft (7) is also fixedly connected with a second driven part (9), the second driven part (9) is positioned outside the shaft neck end of the driving part (8), a second one-way jaw clutch structure is formed between the spiral spline synchronous sleeve (1) and the second driven part (9), and a first elastic element (10) is arranged between the spiral spline synchronous sleeve and the second driven part to enable the first one-way jaw clutch to form a normally closed structure and the second one-way jaw clutch to form a normally open structure; the gear shifting shaft (7) is also provided with a high-speed gear power access component, and the high-speed gear power access structure is used for driving the gear shifting shaft (7) to rotate positively at a high speed; when the low-speed gear positive rotating force is connected, the first one-way jaw clutch is in a combined state, the second one-way jaw clutch is separated, and the gear shifting shaft (7) rotates forwards at a low speed; when the positive rotating force of the high-speed gear is connected, the first one-way jaw clutch is in an overrunning state, the second one-way jaw clutch is separated, and the gear shifting shaft (7) rotates positively at a high speed; when the reverse power is accessed by the driving part (8), the first one-way jaw clutch is separated, the second one-way jaw clutch is combined, and the gear shifting shaft (7) reversely rotates at a low speed.

5. A high-power automatic transmission system, characterized by comprising a driving shaft (13), a driven shaft and a spiral bidirectional overrunning clutch according to any one of claims 1 to 4; the driven shaft is composed of the gear shifting shaft (7), an output gear (14) is arranged on the driven shaft, and a differential (15) is connected with the driven shaft through the output gear (14); wherein the stationary member (12) is constituted by a casing of the gearbox; a low-gear driving gear (17) and a high-gear driving gear (18) are arranged on the driving shaft (13); the driving part (8) of the spiral bidirectional overrunning clutch is normally meshed with the low-speed gear driving gear (17); the high-speed gear power access component is of a gear structure and is normally meshed with a high-speed gear driving gear (18); and the gear shifting shaft (7) is driven to rotate by an active piece (8) or a high-speed gear power access component in an alternative mode.

6. The automatic transmission system according to claim 5, characterized in that said high-gear power access member forms a unitary structure with a first driven member (6) of a helical bi-directional overrunning clutch; the low-gear driving gear (17) and the high-gear driving gear (18) output power to the gear shifting shaft (7) in an alternative mode.

7. Automatic transmission system according to claim 6, characterized in that said low gear driving gear (17) is fixedly connected to said driving shaft (13) and said high gear driving gear (18) is free on said driving shaft (13); a controllable overrunning clutch is arranged between the high-gear driving gear (18) and the driving shaft (13), the controllable overrunning clutch is controlled in a clutch state by the combined action of pushing external force and a second elastic element (19), the driving shaft (13) outputs power to the gear shifting shaft (7) through the high-gear driving gear (18) in a combined state, and the driving shaft (13) outputs power to the gear shifting shaft (7) through the low-gear driving gear (17) in a separated state.

8. Automatic transmission system according to claim 5, characterized in that the low gear driving gear (17) and the high gear driving gear (18) are both fixedly connected or integrated on the drive shaft (13); the high-speed gear power access component is composed of a high-speed gear driven gear (22), and the high-speed gear driven gear (22) is sleeved on the gear shifting shaft (7) in an empty mode; the high-speed gear driven gear (22) and the gear shifting shaft (7) are provided with controllable overrunning clutches, the controllable overrunning clutches are controlled in a clutch state through the combined action of pushing external force and the second elastic element (19), the gear shifting shaft (7) synchronously rotates along with the high-speed gear driven gear (22) in a combined state, and the gear shifting shaft (7) synchronously rotates along with the first driven member (6) in a separated state.

9. The automatic transmission system according to any one of claims 5 to 8, wherein a power input motor (16) is connected to one end of the drive shaft (13) through a spline fitting structure; or the driving shaft (13) is connected with a power input motor (16) through a primary gear transmission structure, and in the scheme that a high-speed gear driving gear (18) is fixedly connected or integrally formed on the driving shaft (13), the high-speed gear driving gear (18) forms a driven gear of the primary gear transmission structure.

10. The automatic transmission system according to claim 7 or 8, wherein the braking external force is constituted by an electromagnetic force generated by an electromagnetic coil; the electromagnetic coil is controlled according to the rotating speed signal.