CN109130817B

CN109130817B - Rear wheel driving system for electric bus

Info

Publication number: CN109130817B
Application number: CN201810994807.XA
Authority: CN
Inventors: 刘海源; 刘璐
Original assignee: Permanently Happy Head Of District In Fuzhou City Wins Information Technology Co ltd
Current assignee: The permanently happy head of district in Fuzhou City wins Information Technology Co.,Ltd.
Priority date: 2018-05-11
Filing date: 2018-08-29
Publication date: 2020-04-14
Anticipated expiration: 2038-08-29
Also published as: CN109130817A

Abstract

The invention belongs to the technical field of driving, and particularly relates to a rear wheel driving system used for an electric bus, which comprises a motor, a driving shaft, a speed reducer, a torque identification mechanism, a bevel gear combination, an actuating mechanism, a transmission mechanism and the like, wherein the torque identification mechanism enables a second centrifugal plate in the actuating mechanism to move in the direction far away from a third rotating shaft under the centrifugal force by identifying the rapid acceleration process of the bus, so that a limiting strip cannot limit a first centrifugal plate, and the first centrifugal plate is separated from a centrifugal plate groove under the centrifugal force; such design is in order to be in the time of first centrifugal plate short time breaking away from the centrifugal plate groove, and the speed of bus can not have very big promotion immediately, just so can give the urgent acceleration process of the passenger adaptation bus of easy carsickness more, has prevented that the passenger of easy carsickness more from producing the situation of carsickness, and then has guaranteed the passenger's of easy carsickness safety more. The invention has simple structure and better use effect.

Description

Rear wheel driving system for electric bus

Technical Field

The invention belongs to the technical field of driving, and particularly relates to a rear wheel driving system for an electric bus.

Background

At present, the state vigorously pushes low-carbon outgoing and green outgoing, so that the existing buses in cities are upgraded from original gasoline-burning buses to pure electric buses; after upgrading, however, the starting and driving modes of the pure electric bus are different from those of the bus burning gasoline, especially in the starting and accelerating processes; for buses burning gasoline, a gear shifting process is generated in the starting acceleration process, a gear shifting gap of about two seconds is generated in the buses burning gasoline during gear shifting, and passengers can adapt to the acceleration process of the buses burning gasoline easily in the gap of about two seconds, so that the method is beneficial to the passengers who feel carsick easily; however, a gap of two seconds cannot occur in the starting and accelerating process of the pure electric bus, so that passengers who are easy to carsickness in comparison are unfavorable. In order to enable passengers who are easy to get sick to adapt to the starting and accelerating process of the pure electric vehicle, a pure electric vehicle driving system capable of reducing the car sickness needs to be designed.

The invention designs a rear wheel driving system for an electric bus to solve the problems.

Disclosure of Invention

In order to solve the defects in the prior art, the invention discloses a rear wheel driving system for an electric bus, which is realized by adopting the following technical scheme.

A rear wheel drive system for an electric bus, characterized in that: the automobile differential comprises a motor, a driving shaft, a speed reducer, a torque identification mechanism, a bevel gear combination, an execution mechanism, a transmission mechanism, a differential, a fifth rotating shaft and wheels, wherein the motor, the speed reducer, the transmission mechanism and the differential are all arranged on an automobile chassis; one end of the driving shaft is connected with the motor shaft, and the other end of the driving shaft is provided with a speed reducer; the torque identification mechanism is connected with the speed reducer; one end of the bevel gear combination is connected with the torque recognition mechanism, and the other end of the bevel gear combination is provided with an execution mechanism; the differential is connected with the actuating mechanism; the two fifth rotating shafts are respectively connected with two output shafts of the differential mechanism; wheels are mounted at one end, which is not connected with the differential, of each fifth rotating shaft; the transmission mechanism is respectively matched with the torque identification mechanism and the actuating mechanism.

The torque identification mechanism comprises a first rotating shaft, a first disc, a first driving ring, a second disc, a second driving ring, a first ring, a third driving ring, a third disc, a volute spiral spring, a first key guide strip, a first spring, a fourth disc, a second rotating shaft, a ring cavity, a ring through groove and a first key guide hole, wherein one end of the first rotating shaft is arranged on the speed reducer, and the other end of the first rotating shaft is provided with the first disc; one end of the first driving ring is arranged on the disc surface of the first disc far away from the first rotating shaft, and the other end of the first driving ring is provided with a second disc; the second disc is provided with a shaft hole; the first disc is provided with a ring cavity; an annular through groove is formed in the disc surface of the first disc, which is far away from the first driving ring; the annular through groove is communicated with the annular cavity; the first ring is mounted in the ring cavity; one end of the third driving ring is arranged on the first ring, and the other end of the third driving ring penetrates through the annular through groove and is provided with a third circular disc; the third disc is provided with a shaft hole, and the inner circular surface of the shaft hole of the third disc is symmetrically provided with two first key guide holes; two first guide key strips are symmetrically arranged on the outer circular surface of the second rotating shaft; one end of the second rotating shaft penetrates through the shaft hole of the second disc, and the other end of the second rotating shaft penetrates through the shaft hole of the third disc; the two first guide key strips respectively penetrate through the corresponding first guide key holes; the fourth disc is provided with a shaft hole and is fixedly arranged on the outer circular surface of the second rotating shaft; the fourth disc is close to one end of the second rotating shaft far away from the first disc; the first spring is nested on the second rotating shaft, one end of the first spring is arranged on the third disc, and the other end of the first spring is arranged on the fourth disc; the second driving ring is arranged on the disc surface of the second disc far away from the first driving ring; one end of the scroll spring is arranged on the outer circular surface of the third disc, and the other end of the scroll spring is arranged on the inner circular surface of the second driving ring; the outer circular surface of one end of the second rotating shaft, which is close to the first disc, is provided with threads; the inner circular surface of the second disc shaft hole is provided with threads; the thread on the outer circular surface of one end of the second rotating shaft, which is close to the first disc, is matched with the thread on the inner circular surface of the shaft hole of the second disc; a plurality of ring teeth are uniformly distributed on the outer circular surface of the second driving ring along the axis direction of the second rotating shaft.

The actuating mechanism comprises a third rotating shaft, a fourth rotating shaft, a shaft sleeve, a ring sleeve, a driving disc, a first centrifugal plate, a first guide block, a second guide key strip, a second spring, a first ring disc, a limiting strip, a limiting ring, a second centrifugal plate, a second guide block, a centrifugal plate groove, a component cavity, a second ring disc, a second centrifugal through groove, a second guide groove, a first centrifugal through groove, a first guide groove, a second guide key hole, a second guide block spring, a first guide block spring, a trapezoid plate and a triangular notch, wherein the driving disc is uniformly arranged at one end, opposite to the third rotating shaft and the fourth rotating shaft; a plurality of centrifugal plate grooves are uniformly formed in the outer circular surface of the driving disc along the circumferential direction; the shaft sleeve is nested on the outer circular surfaces of the third rotating shaft and the fourth rotating shaft; two first centrifugal through grooves are symmetrically formed between the inner circular surface and the outer circular surface of the shaft sleeve; two first guide grooves are symmetrically formed in two side faces of each first centrifugal through groove; two second guide key strips are symmetrically arranged on the outer circular surface of the shaft sleeve where each first centrifugal through groove is located along the axial direction of the shaft sleeve; each second guide key strip is opposite to the corresponding first centrifugal through groove; the ring sleeve is nested on the outer circular surface of the shaft sleeve; the ring sleeve is provided with a component cavity; two second centrifugal through grooves are symmetrically formed between the inner circular surface of the component cavity and the outer circular surface of the ring sleeve; two second guide grooves are symmetrically formed in the two side faces of each second centrifugal through groove; two triangular notches are symmetrically formed in two sides of one end of the first centrifugal plate; two first guide blocks are symmetrically arranged on two side surfaces of the first centrifugal plate, which are provided with triangular notches; the two first guide block springs are respectively arranged on the corresponding first guide blocks; the two first centrifugal plates are respectively arranged in the corresponding first centrifugal through grooves; the first guide block and the first guide block spring which are arranged on each first centrifugal plate are positioned in the corresponding first guide grooves; one end of the first guide block spring, which is not connected with the first guide block, is connected with the groove surface of the first guide groove, which is close to the driving disc; one end of the first centrifugal plate, which is provided with the triangular notch, is positioned in the component cavity; the first centrifugal plate slides in the first centrifugal through groove through the first guide block; one end of the second centrifugal plate is provided with a trapezoidal plate; two second guide blocks are symmetrically arranged on two sides of the second centrifugal plate; the two second guide block springs are respectively arranged on the corresponding second guide blocks; the two second centrifugal plates are respectively arranged in the corresponding second centrifugal through grooves; the second guide block and the second guide block spring which are arranged on each second centrifugal plate are positioned in the corresponding second guide grooves; one end of the second guide block spring, which is not connected with the second guide block, is connected with the groove surface of the second guide groove, which is close to the component cavity; the second centrifugal plate slides in the second centrifugal through groove through a second guide block; one end of the second centrifugal plate with the trapezoidal plate is positioned in the component cavity; two second guide key holes are symmetrically formed in the inner circular surface of the first annular disc; two limiting strips are symmetrically arranged on the disc surface of the first annular disc; each limiting strip is opposite to the corresponding second key guide hole; the limiting ring is arranged on the disc surface of the first ring disc provided with the limiting strip; the two first ring discs are symmetrically nested on the shaft sleeve and positioned on two sides of the first centrifugal plate; each second guide key strip penetrates through a second guide key hole on the corresponding first ring plate; the limiting strip arranged on each first ring disc is matched with the inclined plane of the corresponding triangular notch; the limiting ring arranged on each first ring disc is matched with the inclined plane of the corresponding trapezoidal plate; the two second ring discs are symmetrically and fixedly arranged on the outer circular surface of the shaft sleeve; each second ring disc abuts against a respective side of the component cavity; the two second springs are symmetrically nested on the shaft sleeve; one end of each second spring is arranged on the first ring disc, and the other end of each second spring is arranged on the second ring disc; the first centrifugal plate is matched with the centrifugal plate grooves on the two driving disks.

The transmission mechanism comprises a first fixing plate, a second fixing plate, a first gear, a second gear, a third gear, a fourth gear, a bevel gear, a fifth gear, a sixth gear and bevel gears, wherein the first fixing plate is arranged on an automobile chassis; the second fixing plate is arranged on the first fixing plate; the first gear, the second gear and the third gear are all arranged on the first fixing plate through shafts; the first gear is meshed with ring teeth on the second driving ring; the second gear is respectively meshed with the first gear and the third gear; the fourth gear and the bevel gear are both arranged on the first fixing plate through the same shaft, and the bevel gear is positioned on the upper side of the fourth gear; the third gear is meshed with the fourth gear; the fifth gear and the sixth gear are both arranged on the second fixing plate through shafts; the fifth gear is provided with bevel teeth; the bevel gear is meshed with bevel teeth on the fifth gear; the fifth gear is meshed with the sixth gear; the sixth gear is matched with a ring sleeve in the actuating mechanism.

The outer circular surface of the position where the ring sleeve is matched with the sixth gear is provided with the grinding teeth along the circumferential direction of the ring sleeve; the sixth gear is engaged with the teeth on the ring.

One end of the bevel gear combination is connected with the second rotating shaft, and the other end of the bevel gear combination is connected with the third rotating shaft.

One end of the fourth rotating shaft is connected with an input shaft of the differential.

The first guide block spring is an extension spring; the elastic coefficient of the first guide block spring is smaller than that of the second spring.

The first centrifugal plate is made of light materials.

The diameters of the first gear, the second gear, the third gear and the fourth gear are the same; the diameter of the fourth gear is smaller than the smallest diameter of the bevel gear.

As a further improvement of the technology, one end of the second rotating shaft close to the first disk is spaced from the first disk.

As a further improvement of the technology, one end of the limiting strip, which is not connected with the first annular disc, is provided with a sharp-angled inclined surface; the limiting ring is provided with a ring inclined plane at one end which is not connected with the first ring disc.

As a further improvement of the technology, the end of the first centrifugal plate provided with the triangular notch is spaced from the trapezoidal plate.

As a further improvement of the technology, the light material used for the first centrifugal plate is high-strength aluminum alloy.

As a further improvement of the present technique, the end of the check strap having a sharp bevel is located at the sharp corner of the corresponding triangular cutout when the second spring is not compressed.

As a further improvement of the technology, when the second spring is not compressed, one end of the limit ring with the ring inclined surface is positioned at the sharp corner of the connection between the trapezoidal plate and the second centrifugal plate.

As a further improvement of the present technique, when the second spring is uncompressed, the first guide shoes are located at the middle positions of the first guide grooves and the first guide shoe springs are in a stretched state, each of the first centrifugal plates being located in the corresponding centrifugal plate groove of the two drive disks.

As a further improvement of the present technology, the above-mentioned bevel gear combination is composed of two engaged bevel gears whose rotation axes are at an angle of 90 degrees to each other.

In the invention, a motor drives a speed reducer to work through a driving shaft, the speed reducer drives a first rotating shaft torque identification mechanism to work, a second rotating shaft drives an execution mechanism to work through a bevel gear combination and a third rotating shaft, and a fourth rotating shaft drives wheels to rotate through a differential mechanism and a fifth rotating shaft.

For the torque identification mechanism: the first rotating shaft drives the second disc to rotate through the first disc and the first driving ring, and the second disc drives the second driving ring to rotate; the thread on the outer circular surface of one end of the second rotating shaft, which is close to the first disc, is matched with the thread on the inner circular surface of the shaft hole of the second disc, so that when the second disc rotates, the second disc can rotate and move along the axial direction of the second rotating shaft under the action of the thread matching; the first ring is arranged in the ring cavity, one end of the third driving ring is arranged on the first ring, and the other end of the third driving ring penetrates through the annular through groove and is provided with the third circular disc, so that when the second circular disc rotates, the first ring cannot rotate along with the second circular disc, and further the third driving ring cannot rotate along with the second circular disc; when the second disc moves along the second shaft axis, the second disc can drive the third disc to move along the second shaft axis through the first ring and the third driving ring. The function of the scroll spring is: on one hand, when the scroll spring is compressed, the second driving ring can drive the third disk to rotate through the scroll spring; on the other hand, the scroll spring can drive the second disk to rotate and reset through the second driving ring under the reset force. The two first guide key strips respectively penetrate through the corresponding first guide key holes, the design can ensure that the third disc moves along the axis direction of the second rotating shaft, and meanwhile, the rotating third disc can drive the second rotating shaft to rotate along the axis of the second rotating shaft through the first guide key strips. The fourth disc is fixedly arranged on the second rotating shaft, one end of the first spring is arranged on the third disc, and the other end of the first spring is arranged on the fourth disc, so that the first spring can enable the third disc to move along the axis direction of the second rotating shaft to reset. The design that a distance exists between one end, close to the first disc, of the second rotating shaft and the first disc is that in the process that the threads on the outer circular surface of one end, close to the first disc, of the second rotating shaft are matched with the threads on the inner circular surface of the shaft hole of the second disc, when the second disc moves towards the direction of the fourth disc, the second rotating shaft moves towards the direction of the first disc relatively, and the distance can meet the requirement that when the second rotating shaft moves towards the direction of the first disc to the limit position, the second rotating shaft cannot be in contact interference with the first disc.

The torque identification mechanism of the invention has the following functions: when the first rotating shaft drives the second driving ring to rotate through the first disc, the first driving ring and the second disc, the scroll spring is compressed; when the scroll spring is compressed to a certain amount and the torque provided by the scroll spring is larger than the torque which can be rotated by the second rotating shaft, the second driving ring can drive the second rotating shaft to rotate through the scroll spring, the third disc and the first guide key strip; before the second rotating shaft is not rotated, the first rotating shaft drives the second disk to rotate through the first disk and the first driving ring in the process of compressing the scroll spring, under the threaded matching of the second disk and the second rotating shaft, the second disk rotates and moves along the second rotating shaft axis to the direction of the fourth disk, the second disk drives the third disk to rotate and move along the second rotating shaft axis to the direction of the fourth disk through the first ring and the third driving ring, and the first spring is compressed.

For the actuator: the first centrifugal plate is matched with the centrifugal plate grooves on the two driving disks, so that when the first centrifugal plate is positioned in the corresponding centrifugal plate grooves of the two driving disks, the third rotating shaft can drive the fourth rotating shaft to rotate through the two driving disks and the first centrifugal plate; when the first centrifugal plate is not in the corresponding centrifugal plate grooves of the two driving disks, the third rotating shaft can not drive the fourth rotating shaft to rotate through the two driving disks and the first centrifugal plate. The first centrifugal plate is arranged in the first centrifugal through groove, the first guide block is positioned in the first guide groove, when the first centrifugal plate is positioned in the corresponding centrifugal plate groove of the two driving disks, the rotating driving disks can rotate through the first centrifugal plate to drive the shaft sleeve, the first centrifugal plate rotates around the axis of the third rotating shaft, and under the centrifugal force of the first centrifugal plate, the first centrifugal plate can move in the direction departing from the third rotating shaft; the first guide block spring is used for enabling the first guide block to move and reset, and then the first guide block drives the first centrifugal plate to move and reset. The second centrifugal plate is arranged in the second centrifugal through groove, the second guide block is positioned in the second guide groove, when the ring sleeve rotates, the second centrifugal plate rotates along with the ring sleeve, and under the centrifugal force of the second centrifugal plate, the second centrifugal plate can move in the direction departing from the third rotating shaft; the second guide block spring is used for enabling the second guide block to move and reset, and then the second guide block drives the second centrifugal plate to move and reset. Each second guide key bar penetrates through the corresponding second guide key hole in the first ring disc, so that the first ring disc can move along the axis direction of the shaft sleeve, and the shaft sleeve can drive the first ring disc to rotate through the second guide key bars. The second ring disc is fixedly arranged on the shaft sleeve, one end of the second spring is arranged on the first ring disc, the other end of the second spring is arranged on the second ring disc, and the second spring can enable the first ring disc to move and reset. Each second guide key strip is opposite to the corresponding first centrifugal through groove, and each limiting strip is opposite to the corresponding second guide key hole, so that the design is as follows: when the shaft sleeve rotates, the positions of the first centrifugal plate, the second guide key strip and the limiting strip are opposite all the time, and therefore the limiting strip can be guaranteed to be matched with the triangular notch in the first centrifugal plate all the time. The spacing ring is installed on the side of first ring dish, and the spacing ring is rotatory along with first ring dish so, and the spacing ring can produce the cooperation relation with the second centrifugal plate all the time simultaneously. The design that a distance is arranged between one end of the first centrifugal plate provided with the triangular notch and the trapezoidal plate is characterized in that the movement of the first centrifugal plate does not generate interference on the trapezoidal plate on the second centrifugal plate.

In the actuating mechanism, a first guide block spring is an extension spring, a limiting strip is matched with the inclined plane of a corresponding triangular notch, and a limiting ring is matched with the inclined plane of a corresponding trapezoidal plate; when the second spring is not compressed, the first guide block is positioned in the middle position of the first guide groove and the first guide block spring is in a stretched state, and the first centrifugal plates are positioned in the corresponding centrifugal plate grooves of the two driving discs. When the third rotating shaft drives the fourth rotating shaft to slowly rotate in an accelerated manner through the two driving discs and the first centrifugal plate, the centrifugal force generated by the first centrifugal plate is smaller than the force of the extension spring pulling the first centrifugal plate, and the first centrifugal plate cannot be separated from the centrifugal plate groove. When the rotation speed provided by the third rotating shaft can make the speed of the automobile reach 30km/h, the centrifugal force generated by the first centrifugal plate is equal to the force of the tension spring pulling the first centrifugal plate, and the first centrifugal plate is ready to be separated from the centrifugal plate groove. The design that the elastic coefficient of the first guide block spring is smaller than that of the second spring is that when the first centrifugal plate reaches the condition that the first centrifugal plate can be separated from the centrifugal plate groove, because the elastic coefficient of the second spring is larger than that of the first guide block spring, when the second spring is not compressed, the limiting strip still limits the first centrifugal plate, and therefore the first centrifugal plate still cannot be separated from the centrifugal plate groove; when the second spring is compressed, the limiting strip cannot limit the first centrifugal plate, so that the first centrifugal plate can be separated from the centrifugal plate groove. The limiting strips are matched with the inclined surfaces of the corresponding triangular notches, and the limiting rings are matched with the inclined surfaces of the corresponding trapezoidal plates, so that when the second springs are not compressed, the first centrifugal plates are limited by the limiting strips, and the second centrifugal plates are limited by the limiting rings; when the second centrifugal plate moves in the direction far away from the third rotating shaft, the trapezoidal plate extrudes the limiting ring under the matching of the inclined surface of the trapezoidal plate and the inclined surface of the limiting ring, the extruded limiting ring enables the first ring disc to move in the direction of the second ring disc, and the second spring is compressed; when the second spring is compressed, the limiting strip cannot limit the first centrifugal plate; when the in-process that the second centrifugal plate resets, under the power that resets of second spring, the ring inclined plane of spacing ring contacts the cooperation with the inclined plane of trapezoidal board all the time, and the closed angle inclined plane of spacing strip contacts the cooperation with triangle incision inclined plane all the time, and under the power that resets of second spring, the closed angle inclined plane extrusion triangle incision inclined plane of spacing strip, first centrifugal plate removes to third pivot direction under the extrusion force so, until first centrifugal plate enters into the centrifugal plate groove on two drive discs completely. When the ring sleeve rotates slowly, the centrifugal force generated by the second centrifugal plate is small, and the second centrifugal plate cannot move in the direction away from the third rotating shaft under the blocking force of the second guide block spring; when the ring sleeve rotates rapidly, the centrifugal force generated by the second centrifugal plate is large and overcomes the blocking force of the second guide block spring, the second centrifugal plate moves towards the direction far away from the third rotating shaft, and the second guide block spring is compressed.

For the transfer mechanism: the first gear is meshed with the ring teeth on the second driving ring, so that when the second driving ring moves along the axis direction of the second rotating shaft, the second driving ring can drive the first gear to rotate; the first gear can drive the fourth gear to rotate through the second gear and the third gear; the fourth gear and the bevel gear are coaxial, so that the fourth gear can drive the bevel gear to rotate through the shaft of the fourth gear; the bevel gear is meshed with bevel teeth on the fifth gear, and the fifth gear is meshed with the sixth gear, so that the bevel gear can drive the sixth gear to rotate through the fifth gear; the sixth gear is meshed with the teeth on the ring sleeve, so that the ring sleeve can be driven to rotate by the sixth gear; the diameter of the fourth gear is smaller than the minimum diameter of the bevel gear, the transmission ratio is enlarged, so that the ring sleeve can still rotate for multiple circles under the condition that the fourth gear rotates for a few circles, and the second centrifugal plate can move under the self centrifugal force.

The transmission mechanism in the invention has the following functions: the second drive ring can drive the ring sleeve to rotate through the first gear, the second gear, the third gear, the fourth gear, the bevel gear, the fifth gear and the sixth gear.

The reason why the first centrifugal plate is made of the light material in the invention is that the first centrifugal plate has light weight and generates small centrifugal force when the first centrifugal plate rotates slowly, so that the generated centrifugal force is large only when the rotating speed of the first centrifugal plate reaches a certain condition, and the condition that the first centrifugal plate can be separated from the centrifugal plate groove can be met only by the large centrifugal force.

When the bus is not started, the second spring is not compressed, one end of the limiting strip with a sharp-angled inclined surface is positioned at the sharp-angled position of the corresponding triangular notch, one end of the limiting ring with a ring inclined surface is positioned at the sharp-angled position where the trapezoidal plate is connected with the second centrifugal plate, the first guide block is positioned in the middle of the first guide groove, the first guide block spring is in a stretched state, and the first centrifugal plate is positioned in the corresponding centrifugal plate grooves of the two driving discs.

When the bus is started slowly and accelerated slowly, the motor drives the first rotating shaft to rotate slowly and acceleratively through the driving shaft and the speed reducer; when the first rotating shaft drives the second driving ring to slowly rotate in an accelerated way through the first disc, the first driving ring and the second disc, the scroll spring is compressed; when the volute spiral spring is compressed to a certain amount, and the torque provided by the volute spiral spring is larger than the torque for starting rotation of the second rotating shaft, the second driving ring drives the second rotating shaft to slowly rotate in an accelerated manner through the volute spiral spring, the third disc and the first guide key strip; before the second rotating shaft is not started to rotate, the first rotating shaft drives the second disk to rotate through the first disk and the first driving ring in the process of compressing the scroll spring, under the threaded matching of the second disk and the second rotating shaft, the second disk and the second driving ring rotate and move along the second rotating shaft axial line to the fourth disk direction, the second disk drives the third disk to rotate and move along the second rotating shaft axial line to the fourth disk direction through the first ring and the third driving ring, and the first spring is compressed; because the first rotating shaft is in a slow acceleration state, the compression amount of the volute spiral spring is small, and a phase angle generated between the first rotating shaft and the second rotating shaft is small, so that the distance for the second driving ring to move to the fourth disc along the axis direction of the second rotating shaft is small, the second driving ring drives the first gear to rotate for a small number of turns and rotate slowly, and as a result, after the second driving ring is transmitted by the transmission mechanism, the fifth gear drives the ring sleeve to rotate for a small number of turns and rotate slowly, the centrifugal force generated by the second centrifugal plate is small, the second centrifugal plate cannot move in a direction away from the third rotating shaft under the blocking force of the second guide block spring, the second spring cannot be compressed, the first centrifugal plate is limited by the limiting strips, and the second centrifugal plate is limited by the limiting rings. The second rotating shaft rotating slowly and acceleratedly drives the third rotating shaft to rotate slowly and acceleratedly through the bevel gear combination, the third rotating shaft drives the fourth rotating shaft to rotate slowly and acceleratedly through the two driving disks and the first centrifugal plate, and the fourth rotating shaft drives the wheels to rotate slowly and acceleratedly through the differential and the fifth rotating shaft. When the rotation speed provided by the third rotating shaft enables the speed of the automobile to be larger than 30km/h, although the centrifugal force generated by the first centrifugal plate is larger than the force of the extension spring pulling the first centrifugal plate, the first centrifugal plate can be ready to be separated from the centrifugal plate groove, because the elastic coefficient of the second spring is larger than that of the first guide block spring, and the second spring is not compressed, the limiting strip still limits the first centrifugal plate, and the first centrifugal plate still cannot be separated from the centrifugal plate groove. Eventually the wheels will slowly accelerate to the required speed and in the process the passengers on the bus will not experience a car sickness effect, since the bus is always in a state of slow acceleration.

When the bus is started in a rapid acceleration mode, the motor drives the first rotating shaft to rotate in a rapid acceleration mode through the driving shaft and the speed reducer; when the first rotating shaft drives the second driving ring to rotate in a rapid acceleration mode through the first disc, the first driving ring and the second disc, the scroll spring is compressed; when the volute spiral spring is compressed to a certain amount, and the torque provided by the volute spiral spring is larger than the torque for starting rotation of the second rotating shaft, the second driving ring drives the second rotating shaft to rotate at a rapid acceleration speed through the volute spiral spring, the third disc and the first guide key strip; before the second rotating shaft is not started to rotate, the first rotating shaft drives the second disk to rotate through the first disk and the first driving ring in the process of compressing the scroll spring, under the threaded matching of the second disk and the second rotating shaft, the second disk and the second driving ring rotate and move along the second rotating shaft axial line to the fourth disk direction, the second disk drives the third disk to rotate and move along the second rotating shaft axial line to the fourth disk direction through the first ring and the third driving ring, and the first spring is compressed; because the first rotating shaft is in a rapid acceleration state, the compression amount of the volute spiral spring is larger, and the phase angle generated between the first rotating shaft and the second rotating shaft is larger, so that the distance of the second driving ring moving to the fourth disc along the axis direction of the second rotating shaft is larger, the second driving ring drives the first gear to rotate for a plurality of turns and rotate at a high speed, and as a result, after the second driving ring is transmitted by the transmission mechanism, the fifth gear drives the ring sleeve to rotate for a plurality of turns and rotate at a high speed, the centrifugal force generated by the second centrifugal plate is large, the centrifugal force generated by the second centrifugal plate overcomes the blocking force of the second guide block spring, the second centrifugal plate moves towards the direction far away from the third rotating shaft, under the matching of the inclined surface of the trapezoid plate and the inclined surface of the limit ring, the trapezoid plate extrudes the limit ring, the extruded limit ring enables the first ring disc to move towards the direction of the second ring disc, and the second spring is compressed, the limiting strip is no longer limiting the first centrifugal plate, and the limiting ring is no longer limiting the second centrifugal plate. When the bus starts, the speed of the bus cannot reach 30km/h immediately, so that the centrifugal force generated by the first centrifugal plate is smaller than the force of the extension spring pulling the first centrifugal plate, the first centrifugal plate still cannot be separated from the centrifugal plate groove, and the third rotating shaft can drive the fourth rotating shaft to rotate through the two driving discs and the first centrifugal plate. The second rotating shaft which rotates at a rapid speed drives the third rotating shaft to rotate at a rapid speed through the bevel gear combination, the third rotating shaft drives the fourth rotating shaft to rotate at a rapid speed through the two driving discs and the first centrifugal plate, and the fourth rotating shaft drives the wheel to rotate at a rapid speed through the differential and the fifth rotating shaft.

When the bus suddenly accelerates in the running process, the motor drives the first rotating shaft to rotate in a sudden acceleration mode through the driving shaft and the speed reducer; when the first rotating shaft drives the second driving ring to rotate in a rapid acceleration mode through the first disc, the first driving ring and the second disc, the scroll spring is continuously compressed; when the volute spiral spring is compressed to a certain amount, and the torque provided by the volute spiral spring is larger than the torque of the second rotating shaft for rapid accelerated rotation, the second driving ring drives the second rotating shaft to rapidly accelerate and rotate through the volute spiral spring, the third disc and the first guide key strip; before the second rotating shaft is not started to rotate, the first rotating shaft drives the second disk to rotate through the first disk and the first driving ring in the process of compressing the scroll spring, under the threaded matching of the second disk and the second rotating shaft, the second disk and the second driving ring rotate and move along the second rotating shaft axial line to the fourth disk direction, the second disk drives the third disk to rotate and move along the second rotating shaft axial line to the fourth disk direction through the first ring and the third driving ring, and the first spring is continuously compressed; because the first rotating shaft is in a rapid acceleration state, the compression amount of the volute spiral spring is large, and the phase angle generated between the first rotating shaft and the second rotating shaft is also large, so that the distance for the second driving ring to move to the fourth disc along the axis direction of the second rotating shaft is large, the second driving ring drives the first gear to rotate for a large number of turns and rotate at a high speed, and as a result, after the second driving ring is transmitted by the transmission mechanism, the fifth gear drives the ring sleeve to rotate for a large number of turns and rotate at a high speed, the centrifugal force generated by the second centrifugal plate is large, the centrifugal force generated by the second centrifugal plate overcomes the blocking force of the second guide block spring, the second centrifugal plate moves towards the direction far away from the third rotating shaft, under the matching of the inclined surface of the trapezoid plate and the inclined surface of the limiting ring, the trapezoid plate extrudes the limiting ring, the extruded limiting ring enables the first ring disc to move towards the direction of the second ring disc, and the second spring is compressed, the limiting strip is no longer limiting the first centrifugal plate, and the limiting ring is no longer limiting the second centrifugal plate. The second rotating shaft which rotates at a rapid speed drives the third rotating shaft to rotate at a rapid speed through the bevel gear combination, the third rotating shaft drives the fourth rotating shaft to rotate at a rapid speed through the two driving discs and the first centrifugal plate, and the fourth rotating shaft drives the wheel to rotate at a rapid speed through the differential and the fifth rotating shaft. When the rotation speed provided by the third rotating shaft enables the speed of the automobile to be larger than 30km/h, although the centrifugal force generated by the first centrifugal plate is larger than the force of the extension spring pulling the first centrifugal plate, the first centrifugal plate can be ready to be separated from the centrifugal plate groove, and meanwhile, as the elastic coefficient of the second spring is larger than that of the first guide block spring and the second spring is compressed, the limiting strip does not limit the first centrifugal plate any more, the first centrifugal plate can be separated from the centrifugal plate groove. After the first centrifugal plate is separated from the centrifugal plate groove, the third rotating shaft cannot drive the fourth rotating shaft to rotate at a rapid speed through the first centrifugal plate; when the second driving ring moves to the limit position towards the direction of the fourth disk, the second driving ring does not drive the ring sleeve to rotate through the transmission mechanism any more, further, the centrifugal force of the second centrifugal plate will not work, the second centrifugal plate returns to the original position under the reset force of the second guide block spring, the second centrifugal plate moves towards the direction of the third rotating shaft, at the moment, under the reset force of the second spring, the ring inclined plane of the limiting ring is always in contact fit with the inclined plane of the trapezoidal plate, the sharp-corner inclined plane of the limiting strip is always in contact fit with the triangular notch inclined plane, and under the reset force of the second spring, the sharp-corner inclined plane of the limiting strip extrudes the triangular notch inclined plane, so that the first centrifugal plate moves towards the direction of the third rotating shaft under the extrusion force until the first centrifugal plate completely enters the centrifugal plate grooves on the two driving disks. Then the third rotating shaft drives the fourth rotating shaft to rotate in an accelerated way through the two driving discs and the first centrifugal plate; the fourth rotating shaft drives the wheels to rotate in an accelerated manner through the differential mechanism and the fifth rotating shaft, and finally the wheels can be accelerated to the required speed. The design that first centrifugal plate breaks away from the centrifugal plate groove among the actuating mechanism lies in, when the bus suddenly when accelerating suddenly, first centrifugal plate breaks away from the centrifugal plate groove, in the time that first centrifugal plate breaks away from the centrifugal plate groove for a short time, the speed of bus can not have very big promotion immediately, just so can give the urgent acceleration process of the passenger adaptation bus of easy carsickness, the passenger that has prevented easy carsickness produces the situation of carsickness, and then guaranteed the passenger's of easy carsickness safety.

After the bus stops, the second disc, the third disc and the second rotating shaft are restored to the original positions under the restoring force of the spiral spring and the restoring force of the first spring.

Compared with the traditional driving technology, the torque identification mechanism enables the second centrifugal plate in the execution mechanism to move in the direction far away from the third rotating shaft under the centrifugal force by identifying the rapid acceleration process of the bus, so that the limiting strip cannot limit the first centrifugal plate, and the first centrifugal plate is separated from the centrifugal plate groove under the centrifugal force; such design is in order to be in the time of first centrifugal plate short time breaking away from the centrifugal plate groove, and the speed of bus can not have very big promotion immediately, just so can give the urgent acceleration process of the passenger adaptation bus of easy carsickness more, has prevented that the passenger of easy carsickness more from producing the situation of carsickness, and then has guaranteed the passenger's of easy carsickness safety more. The invention has simple structure and better use effect.

Drawings

Fig. 1 is an overall schematic view of a rear wheel drive system.

FIG. 2 is a perspective schematic view of a torque identification mechanism.

Fig. 3 is a schematic front view of the transfer mechanism.

Fig. 4 is an overall schematic view of the transfer mechanism.

FIG. 5 is a schematic sectional elevation view of the torque recognition mechanism.

Figure 6 is a schematic view of the first disc installation.

FIG. 7 is a schematic view of a scroll spring installation.

FIG. 8 is a schematic view of the first guide key strip installation.

Fig. 9 is a schematic sectional elevation view of an actuator.

FIG. 10 is a schematic view of the drive disk mounting.

Figure 11 is a cross-sectional view of a cuff.

Fig. 12 is a schematic cross-sectional view of the bushing.

Fig. 13 is a schematic view of the mounting of the stop strip.

Fig. 14 is a second spring mounting schematic.

Fig. 15 is a schematic view of the first guide block installation.

Number designation in the figures: 1. a motor; 2. a drive shaft; 3. a speed reducer; 4. a first rotating shaft; 5. a torque identification mechanism; 6. combining the bevel teeth; 7. a third rotating shaft; 8. an actuator; 9. a fourth rotating shaft; 10. a transfer mechanism; 12. a differential mechanism; 13. a fifth rotating shaft; 14. a wheel; 15. a first fixing plate; 16. a second fixing plate; 17. a first gear; 18. a second gear; 19. a third gear; 20. a fourth gear; 21. a bevel gear; 22. a fifth gear; 23. a sixth gear; 24. conical teeth; 25. a first disc; 26. a first drive ring; 27. a second disc; 28. a second drive ring; 29. a first ring; 30. a third drive ring; 31. a third disc; 32. a volute spiral spring; 33. a first guide key bar; 34. a first spring; 35. a fourth disc; 36. a second rotating shaft; 37. an annular cavity; 38. a circular through groove; 39. a first key guide hole; 40. a shaft sleeve; 41. sleeving a ring; 42. a drive disk; 43. a first centrifugal plate; 44. a first guide block; 45. a second guide key bar; 46. a second ring plate; 47. a second spring; 48. a first ring plate; 49. a limiting strip; 50. a limiting ring; 51. a second centrifugal plate; 52. a second guide block; 53. a centrifugal plate groove; 54. a component cavity; 55. a second centrifugal through slot; 56. a second guide groove; 57. a first centrifugal through slot; 58. a first guide groove; 59. a second key hole; 60. a sharp-angled bevel; 61. a ring bevel; 62. a second guide spring; 63. a first guide spring; 64. a trapezoidal plate; 65. and (4) carrying out triangular incision.

Detailed Description

As shown in fig. 1, the vehicle-mounted hybrid power system comprises a motor 1, a driving shaft 2, a speed reducer 3, a torque identification mechanism 5, a bevel gear assembly 6, an actuating mechanism 8, a transmission mechanism 10, a differential mechanism 12, a fifth rotating shaft 13 and wheels 14, wherein the motor 1, the speed reducer 3, the transmission mechanism 10 and the differential mechanism 12 are all mounted on a chassis of the vehicle; as shown in fig. 1, one end of a driving shaft 2 is connected with a shaft of a motor 1, and the other end is provided with a speed reducer 3; the torque identification mechanism 5 is connected with the speed reducer 3; one end of the bevel gear combination 6 is connected with the torque recognition mechanism 5, and the other end is provided with an actuating mechanism 8; the differential mechanism 12 is connected with the actuating mechanism 8; the two fifth rotating shafts 13 are respectively connected with two output shafts of the differential 12; wheels 14 are arranged at one end of each fifth rotating shaft 13, which is not connected with the differential 12; as shown in fig. 2 and 3, the transmission mechanism 10 is engaged with the torque recognition mechanism 5 and the actuator 8, respectively.

As shown in fig. 2, the torque recognition mechanism 5 includes a first rotating shaft 4, a first disk 25, a first drive ring 26, a second disk 27, a second drive ring 28, a first ring 29, a third drive ring 30, a third disk 31, a spiral spring 32, a first spline bar 33, a first spring 34, a fourth disk 35, a second rotating shaft 36, a ring cavity 37, a ring through groove 38, and a first spline hole 39, as shown in fig. 1 and 5, wherein one end of the first rotating shaft 4 is mounted on the speed reducer 3, and the other end is mounted with the first disk 25; as shown in fig. 5 and 6, one end of the first drive ring 26 is mounted on the disc surface of the first disc 25 away from the first rotating shaft 4, and the other end is mounted with the second disc 27; the second disk 27 has a shaft hole; an annular chamber 37 is formed in the first disc 25; the disc surface of the first disc 25 far away from the first driving ring 26 is provided with an annular through groove 38; the annular through groove 38 is communicated with the annular cavity 37; as shown in fig. 5 and 8, the first ring 29 is mounted in the ring cavity 37; one end of the third drive ring 30 is mounted on the first ring 29, and the other end passes through the annular through groove 38 and is mounted with the third disc 31; as shown in fig. 7, the third disc 31 has a shaft hole, and two first guiding key holes 39 are symmetrically formed on the inner circumferential surface of the shaft hole of the third disc 31; as shown in fig. 8, two first guiding key strips 33 are symmetrically installed on the outer circumferential surface of the second rotating shaft 36; as shown in fig. 5, one end of the second rotating shaft 36 passes through the shaft hole of the second disc 27, and the other end passes through the shaft hole of the third disc 31; the two first key guide bars 33 respectively pass through the corresponding first key guide holes 39; the fourth disc 35 is provided with a shaft hole, and the fourth disc 35 is fixedly arranged on the outer circular surface of the second rotating shaft 36; the fourth disc 35 is close to the end of the second rotating shaft 36 far away from the first disc 25; as shown in fig. 5 and 7, the first spring 34 is nested on the second rotating shaft 36, one end of the first spring 34 is mounted on the third disk 31, and the other end is mounted on the fourth disk 35; as shown in fig. 5 and 6, a second drive ring 28 is mounted on the disk surface of the second disk 27 remote from the first drive ring 26; one end of a spiral spring 32 is mounted on the outer circumferential surface of the third disc 31, and the other end is mounted on the inner circumferential surface of the second drive ring 28; the second rotating shaft 36 has a thread on the outer circular surface of one end near the first disc 25; the inner circular surface of the shaft hole of the second disc 27 is provided with screw threads; the thread on the external circular surface of one end of the second rotating shaft 36 close to the first disc 25 is matched with the thread on the internal circular surface of the shaft hole of the second disc 27; a plurality of ring teeth are uniformly distributed on the outer circular surface of the second driving ring 28 along the axial direction of the second rotating shaft 36.

As shown in fig. 2, the actuator 8 includes a third shaft 7, a fourth shaft 9, a shaft sleeve 40, a ring sleeve 41, a driving disk 42, a first centrifugal plate 43, a first guide block 44, a second guide key strip 45, a second spring 47, a first ring plate 48, a limit strip 49, a limit ring 50, a second centrifugal plate 51, a second guide block 52, a centrifugal plate groove 53, a member cavity 54, a second ring plate 46, a second centrifugal groove 55, a second guide groove 56, a first centrifugal groove 57, a first guide groove 58, a second guide key hole 59, a second guide block spring 62, a first guide block spring 63, a stepped plate 64, and a triangular notch 65, as shown in fig. 10, wherein the driving disk 42 is uniformly installed at the opposite end of the third shaft 7 and the fourth shaft 9; a plurality of centrifugal plate grooves 53 are uniformly formed on the outer circumferential surface of the driving disc 42 along the circumferential direction; as shown in fig. 9 and 12, the shaft sleeve 40 is nested on the outer circular surfaces of the third rotating shaft 7 and the fourth rotating shaft 9; two first centrifugal through grooves 57 are symmetrically formed between the inner circular surface and the outer circular surface of the shaft sleeve 40; two first guide grooves 58 are symmetrically formed in two side faces of each first centrifugal through groove 57; two second guide key strips 45 are symmetrically arranged on the outer circular surface of the shaft sleeve 40 where each first centrifugal through groove 57 is located along the axial direction of the shaft sleeve 40; each second keybar 45 is opposite to a corresponding first centrifugal through slot 57; as shown in fig. 9 and 11, the ring 41 is nested on the outer circumferential surface of the sleeve 40; the collar 41 has a component cavity 54 therein; two second centrifugal through grooves 55 are symmetrically formed between the inner circular surface of the component cavity 54 and the outer circular surface of the ring sleeve 41; two second guide grooves 56 are symmetrically formed on two side surfaces of each second centrifugal through groove 55; as shown in fig. 15, two triangular notches 65 are symmetrically formed at both sides of one end of the first centrifugal plate 43; two first guide blocks 44 are symmetrically arranged on two side surfaces of the first centrifugal plate 43, which are provided with the triangular notches 65; two first guide block springs 63 are respectively mounted on the corresponding first guide blocks 44; as shown in fig. 9, two first centrifugal plates 43 are respectively mounted in the corresponding first centrifugal through slots 57; the first guide shoes 44 and the first guide shoe springs 63 mounted on each of the first centrifugal plates 43 are located in the corresponding first guide grooves 58; the end of the first guide block spring 63 not connected with the first guide block 44 is connected with the groove surface of the first guide groove 58 close to the driving disc 42; one end of the first centrifugal plate 43, which is provided with the triangular notch 65, is positioned in the component cavity 54; the first centrifugal plate 43 slides in the first centrifugal through slot 57 through the first guide block 44; as shown in fig. 15, the second centrifugal plate 51 has a stepped plate 64 at one end; two second guide blocks 52 are symmetrically arranged on two sides of the second centrifugal plate 51; two second guide block springs 62 are respectively mounted on the corresponding second guide blocks 52; as shown in fig. 9, two second centrifugal plates 51 are respectively mounted in the corresponding second centrifugal through slots 55; the second guide shoes 52 and the second guide shoe springs 62 mounted on each second centrifugal plate 51 are located in the corresponding second guide grooves 56; the end of the second guide spring 62 not connected to the second guide 52 is connected to the groove surface of the second guide groove 56 adjacent to the member cavity 54; the second centrifugal plate 51 slides in the second centrifugal through slot 55 through the second guide block 52; the end of the second centrifugal plate 51 having the stepped plate 64 is located in the component cavity 54; as shown in fig. 13, two second guiding key holes 59 are symmetrically formed on the inner circumferential surface of the first ring plate 48; two limiting strips 49 are symmetrically arranged on the disc surface of the first annular disc 48; each stopper strip 49 is opposite to the corresponding second guiding key hole 59; the limiting ring 50 is arranged on the disc surface of the first ring disc 48 provided with the limiting strip 49; as shown in fig. 9, two first annular disks 48 are symmetrically nested on the sleeve 40, and the two first annular disks 48 are located on both sides of the first centrifugal plate 43; each second keybar 45 passes through a corresponding second keyhole 59 in the first ring plate 48; the limiting strip 49 arranged on each first ring disc 48 is matched with the inclined surface of the corresponding triangular notch 65; the limiting ring 50 arranged on each first ring disc 48 is matched with the inclined surface of the corresponding trapezoidal plate 64; as shown in fig. 9, 11 and 14, two second annular discs 46 are symmetrically and fixedly mounted on the outer circumferential surface of the shaft sleeve 40; each second ring disk 46 abuts a respective side of the component cavity 54; two second springs 47 are symmetrically nested on the sleeve 40; each second spring 47 has one end mounted on the first ring disk 48 and the other end mounted on the second ring disk 46; the first centrifugal plate 43 cooperates with the centrifugal plate slots 53 on the two drive disks 42.

As shown in fig. 4, the transmission mechanism 10 includes a first fixed plate 15, a second fixed plate 16, a first gear 17, a second gear 18, a third gear 19, a fourth gear 20, a bevel gear 21, a fifth gear 22, a sixth gear 23, and a bevel gear 24, wherein the first fixed plate 15 is mounted on the chassis of the vehicle; as shown in fig. 4, the second fixing plate 16 is mounted on the first fixing plate 15; the first gear 17, the second gear 18 and the third gear 19 are all mounted on the first fixing plate 15 through shafts; the first gear 17 meshes with ring teeth on the second drive ring 28; the second gear 18 is meshed with the first gear 17 and the third gear 19 respectively; the fourth gear 20 and the bevel gear 21 are both mounted on the first fixing plate 15 through the same shaft, and the bevel gear 21 is located on the upper side of the fourth gear 20; the third gear 19 is meshed with the fourth gear 20; the fifth gear 22 and the sixth gear 23 are both mounted on the second fixing plate 16 through shafts; the fifth gear 22 is provided with bevel teeth 24; the bevel gear 21 is meshed with bevel teeth 24 on a fifth gear 22; the fifth gear 22 is meshed with the sixth gear 23; as shown in fig. 3, the sixth gear 23 cooperates with a collar 41 in the actuator 8.

The outer circular surface of the position where the ring sleeve 41 is matched with the sixth gear 23 is provided with the teeth along the circumferential direction of the ring sleeve 41; the sixth gear 23 meshes with the teeth on the collar 41.

One end of the bevel gear assembly 6 is connected with the second rotating shaft 36, and the other end is connected with the third rotating shaft 7.

One end of the fourth rotating shaft 9 is connected to an input shaft of a differential 12.

The first guide spring 63 is an extension spring; the elastic coefficient of the first guide spring 63 is smaller than that of the second spring 47.

The first centrifugal plate 43 is made of a lightweight material.

As shown in fig. 4, the diameters of the first gear 17, the second gear 18, the third gear 19, and the fourth gear 20 are the same; the diameter of the fourth gear 20 is smaller than the smallest diameter of the bevel gears 21.

As shown in fig. 9, the second shaft 36 is spaced from the first disk 25 at an end thereof adjacent to the first disk 25.

As shown in FIG. 13, the end of the stop strip 49 not connected to the first annular disk 48 has a sharp bevel 60; the end of the stop collar 50 not connected to the first annular disk 48 has an annular ramp 61.

As shown in fig. 9, the end of the first centrifugal plate 43 where the triangular notch 65 is formed is spaced from the trapezoidal plate 64.

The first centrifugal plate 43 is made of a high-strength aluminum alloy.

When the second spring 47 is uncompressed, the end of the stop bar 49 having the pointed ramp 60 is located at the sharp corner of the corresponding triangular cutout 65.

When the second spring 47 is not compressed, one end of the retainer ring 50 having the ring inclined surface 61 is located at a sharp corner where the stepped plate 64 is connected to the second centrifugal plate 51.

When the second springs 47 are not compressed, the first guide shoes 44 are located at the middle positions of the first guide grooves 58 and the first guide shoe springs 63 are in a stretched state, and each of the first centrifugal plates 43 is located in the corresponding centrifugal plate groove 53 of the two drive disks 42.

The bevel gear combination 6 is composed of two meshed bevel gears 24 with rotation axes forming an included angle of 90 degrees.

In the invention, a motor 1 drives a speed reducer 3 to work through a driving shaft 2, the speed reducer 3 drives a first rotating shaft 4 and a torque identification mechanism 5 to work, a second rotating shaft 36 drives an actuating mechanism 8 to work through a bevel gear combination 6 and a third rotating shaft 7, and a fourth rotating shaft 9 drives wheels 14 to rotate through a differential mechanism 12 and a fifth rotating shaft 13.

For the torque recognition mechanism 5: the first rotating shaft 4 drives the second disk 27 to rotate through the first disk 25 and the first driving ring 26, and the second disk 27 drives the second driving ring 28 to rotate; the thread on the outer circular surface of one end of the second rotating shaft 36 close to the first disk 25 is matched with the thread on the inner circular surface of the shaft hole of the second disk 27, so that when the second disk 27 rotates, the second disk 27 can rotate and move along the axial direction of the second rotating shaft 36 under the action of the thread matching; the first ring 29 is installed in the ring cavity 37, one end of the third driving ring 30 is installed on the first ring 29, the other end passes through the ring through groove 38 and is installed with the third disk 31, then when the second disk 27 rotates, the first ring 29 does not rotate along with the second disk 27, and further the third driving ring 30 does not rotate along with the second disk 27; when the second disc 27 moves along the axial direction of the second rotating shaft 36, the second disc 27 can drive the third disc 31 to move along the axial direction of the second rotating shaft 36 via the first ring 29 and the third drive ring 30. The scroll spring 32 functions to: on one hand, when the spiral spring 32 is compressed, the second driving ring 28 can drive the third disk 31 to rotate via the spiral spring 32; on the other hand, the scroll spring 32 can rotationally return the second disk 27 via the second drive ring 28 by a return force. The two first key guiding bars 33 respectively pass through the corresponding first key guiding holes 39, so that the third disk 31 can move along the axis direction of the second rotating shaft 36, and the rotating third disk 31 can drive the second rotating shaft 36 to rotate along the axis of the second rotating shaft 36 through the first key guiding bars 33. The fourth disc 35 is fixedly installed on the second rotating shaft 36, one end of the first spring 34 is installed on the third disc 31, and the other end is installed on the fourth disc 35, so that the first spring 34 can move and reset the third disc 31 along the axial direction of the second rotating shaft 36. The design of the space between the end of the second rotating shaft 36 close to the first disk 25 and the first disk 25 is that, in the process of matching the thread on the outer circular surface of the end of the second rotating shaft 36 close to the first disk 25 with the thread on the inner circular surface of the shaft hole of the second disk 27, when the second disk 27 moves towards the fourth disk 35, the second rotating shaft 36 moves towards the first disk 25 relatively, and the space can meet the requirement that when the second rotating shaft 36 moves towards the first disk 25 to the limit position, the second rotating shaft 36 does not contact and interfere with the first disk 25.

The torque identification mechanism 5 of the present invention functions as: when the first rotating shaft 4 rotates the second drive ring 28 via the first disk 25, the first drive ring 26 and the second disk 27, the scroll spring 32 is compressed; when the spiral spring 32 is compressed to a certain amount, the torque provided by the spiral spring 32 is greater than the torque that the second rotating shaft 36 can rotate, and the second driving ring 28 can drive the second rotating shaft 36 to rotate through the spiral spring 32, the third disc 31 and the first guide key strip 33; before the second rotating shaft 36 is not rotated, the first rotating shaft 4 drives the second disk 27 to rotate via the first disk 25 and the first driving ring 26 in the process that the scroll spring 32 is compressed, the second disk 27 rotates along the axis of the second rotating shaft 36 to the direction of the fourth disk 35 under the screw-fit of the second disk 27 and the second rotating shaft 36, and the second disk 27 drives the third disk 31 to rotate along the axis of the second rotating shaft 36 to the direction of the fourth disk 35 via the first ring 29 and the third driving ring 30, so that the first spring 34 is compressed.

For the actuator 8: the first centrifugal plate 43 is matched with the centrifugal plate grooves 53 on the two driving disks 42, so that when the first centrifugal plate 43 is positioned in the corresponding centrifugal plate grooves 53 of the two driving disks 42, the third rotating shaft 7 can drive the fourth rotating shaft 9 to rotate through the two driving disks 42 and the first centrifugal plate 43; when the first centrifugal plate 43 is not in the corresponding centrifugal plate slot 53 of the two drive disks 42, the third rotating shaft 7 cannot rotate the fourth rotating shaft 9 via the two drive disks 42 and the first centrifugal plate 43. The first centrifugal plate 43 is mounted in the first centrifugal through slot 57, the first guide block 44 is located in the first guide slot 58, so that when the first centrifugal plate 43 is located in the corresponding centrifugal plate slot 53 of the two drive disks 42, the rotating drive disk 42 can drive the shaft sleeve 40 to rotate via the first centrifugal plate 43, the first centrifugal plate 43 rotates around the axis of the third rotating shaft 7, and then under the centrifugal force of the first centrifugal plate 43, the first centrifugal plate 43 can move in the direction away from the third rotating shaft 7; the first guide spring 63 is used to move and reset the first guide 44, so that the first guide 44 drives the first centrifugal plate 43 to move and reset. The second centrifugal plate 51 is installed in the second centrifugal through groove 55, and the second guide block 52 is located in the second guide groove 56, so that when the collar 41 rotates, the second centrifugal plate 51 follows the collar 41 to rotate, and then under the centrifugal force of the second centrifugal plate 51, the second centrifugal plate 51 can move in the direction away from the third rotating shaft 7; the second guide block spring 62 is used for moving and resetting the second guide block 52, and the second guide block 52 drives the second centrifugal plate 51 to move and reset. Each second guiding key bar 45 passes through the corresponding second guiding key hole 59 on the first annular disc 48, so that the first annular disc 48 can move along the axial direction of the shaft sleeve 40, and the shaft sleeve 40 can drive the first annular disc 48 to rotate through the second guiding key bar 45. The second ring disk 46 is fixedly mounted on the sleeve 40, and the second spring 47 has one end mounted on the first ring disk 48 and the other end mounted on the second ring disk 46, so that the second spring 47 can move and reset the first ring disk 48. Each second guiding key strip 45 is opposite to the corresponding first centrifugal through groove 57, and each limiting strip 49 is opposite to the corresponding second guiding key hole 59, so that the design is as follows: when the shaft sleeve 40 rotates, the positions of the first centrifugal plate 43, the second guide key strip 45 and the limiting strip 49 are always opposite, so that the limiting strip 49 can be ensured to be always matched with the triangular notch 65 on the first centrifugal plate 43. The retainer ring 50 is mounted on the side of the first ring disk 48, so that the retainer ring 50 rotates with the first ring disk 48, while the retainer ring 50 can always be brought into a fitting relationship with the second centrifugal plate 51. The spacing between the end of the first centrifugal plate 43 where the triangular cut-out 65 is made and the trapezoidal plate 64 is designed in such a way that the movement of the first centrifugal plate 43 does not interfere with the trapezoidal plate 64 on the second centrifugal plate 51.

In the actuating mechanism 8 of the invention, the first guide block spring 63 is an extension spring, the limit strip 49 is matched with the inclined plane of the corresponding triangular notch 65, and the limit ring 50 is matched with the inclined plane of the corresponding trapezoidal plate 64; when the second spring 47 is not compressed, the first guide block 44 is located at the middle position of the first guide groove 58 and the first guide block spring 63 is in a stretched state, and the first centrifugal plates 43 are located in the respective centrifugal plate grooves 53 of the two drive disks 42. When the third rotating shaft 7 drives the fourth rotating shaft 9 to rotate slowly and acceleratively through the two driving disks 42 and the first centrifugal plate 43, the centrifugal force generated by the first centrifugal plate 43 is smaller than the force of the tension spring pulling the first centrifugal plate 43, and the first centrifugal plate 43 cannot be separated from the centrifugal plate groove 53. When the rotation speed provided by the third rotating shaft 7 is such that the speed of the car reaches 30km/h, the centrifugal force generated by the first centrifugal plate 43 is equal to the force of the tension spring pulling the first centrifugal plate 43, and the first centrifugal plate 43 is ready to be disengaged from the centrifugal plate slot 53. The design that the elastic coefficient of the first guide spring 63 is smaller than that of the second spring 47 is that, when the first centrifugal plate 43 reaches the condition that the first centrifugal plate 43 can be separated from the centrifugal plate groove 53, since the elastic coefficient of the second spring 47 is larger than that of the first guide spring 63, when the second spring 47 is not compressed, the limit strip 49 still limits the first centrifugal plate 43, so that the first centrifugal plate 43 still cannot be separated from the centrifugal plate groove 53; when the second spring 47 is compressed, the stopper bar 49 cannot stop the first centrifugal plate 43, so that the first centrifugal plate 43 can be disengaged from the centrifugal plate groove 53. The limiting strips 49 are matched with the inclined surfaces of the corresponding triangular notches 65, and the limiting rings 50 are matched with the inclined surfaces of the corresponding trapezoidal plates 64, so that when the second springs 47 are not compressed, the limiting strips 49 limit the first centrifugal plates 43, and the limiting rings 50 limit the second centrifugal plates 51; when the second centrifugal plate 51 moves away from the third rotating shaft 7, the trapezoidal plate 64 presses the limit ring 50 under the matching of the inclined surface of the trapezoidal plate 64 and the ring inclined surface 61 of the limit ring 50, the pressed limit ring 50 enables the first ring disc 48 to move towards the second ring disc 46, and the second spring 47 is compressed; when the second spring 47 is compressed, the limiting strip 49 cannot limit the first centrifugal plate 43; when the second centrifugal plate 51 is reset, under the reset force of the second spring 47, the ring inclined surface 61 of the retainer ring 50 is always in contact fit with the inclined surface of the trapezoidal plate 64, the pointed inclined surface 60 of the retainer bar 49 is always in contact fit with the triangular notch 65, and under the reset force of the second spring 47, the pointed inclined surface 60 of the retainer bar 49 presses the triangular notch 65, so that the first centrifugal plate 43 moves towards the third rotating shaft 7 under the pressing force until the first centrifugal plate 43 completely enters the centrifugal plate grooves 53 on the two driving disks 42. When the ring sleeve 41 rotates slowly, the centrifugal force generated by the second centrifugal plate 51 is small, and the second centrifugal plate 51 cannot move away from the third rotating shaft 7 under the blocking force of the second guide block spring 62; when the ring 41 rotates rapidly, the centrifugal force generated by the second centrifugal plate 51 is large and overcomes the blocking force of the second guide spring 62, the second centrifugal plate 51 moves away from the third rotating shaft 7, and the second guide spring 62 is compressed.

For the transfer mechanism 10: the first gear 17 is meshed with the ring gear on the second driving ring 28, so that when the second driving ring 28 moves along the axial direction of the second rotating shaft 36, the second driving ring 28 can drive the first gear 17 to rotate; the first gear 17 can drive the fourth gear 20 to rotate through the second gear 18 and the third gear 19; the fourth gear 20 and the bevel gear 21 are coaxial, so that the fourth gear 20 can drive the bevel gear 21 to rotate through the shaft of the fourth gear 20; the bevel gear 21 is meshed with the bevel gear 24 on the fifth gear 22, and the fifth gear 22 is meshed with the sixth gear 23, so that the bevel gear 21 can drive the sixth gear 23 to rotate through the fifth gear 22; the sixth gear 23 is engaged with the teeth on the ring 41, so that the ring 41 can be rotated by the sixth gear 23; the diameter of the fourth gear 20 is smaller than the minimum diameter of the bevel gear 21, and the transmission ratio is enlarged, so that the ring sleeve 41 can still rotate for a plurality of turns when the fourth gear 20 rotates for a few turns, and the second centrifugal plate 51 can move under the self centrifugal force.

The transmission mechanism 10 of the present invention functions as: the second driving ring 28 can drive the ring sleeve 41 to rotate through the first gear 17, the second gear 18, the third gear 19, the fourth gear 20, the bevel gear 21, the fifth gear 22 and the sixth gear 23.

The reason why the first centrifugal plate 43 is made of a light material in the present invention is that the first centrifugal plate 43 has a relatively light weight and the centrifugal force generated when the first centrifugal plate 43 rotates slowly is relatively small, so that only when the rotation speed of the first centrifugal plate 43 reaches a certain condition, the centrifugal force generated at this time is relatively large and the relatively large centrifugal force satisfies the condition that the first centrifugal plate 43 can be separated from the centrifugal plate groove 53.

The specific implementation mode is as follows: when the bus is not taking off, the second spring 47 is uncompressed, the end of the check ring 49 having the sharp inclined surface 60 is located at the sharp corner of the corresponding triangular notch 65, the end of the check ring 50 having the ring inclined surface 61 is located at the sharp corner where the trapezoidal plate 64 is connected to the second centrifugal plate 51, the first guide shoe 44 is located at the middle of the first guide groove 58 and the first guide shoe spring 63 is in a stretched state, and the first centrifugal plate 43 is located in the corresponding centrifugal plate groove 53 of the two drive disks 42.

When the bus is started slowly and accelerated slowly, the motor 1 drives the first rotating shaft 4 to rotate slowly and acceleratively through the driving shaft 2 and the speed reducer 3; when the first rotating shaft 4 drives the second driving ring 28 to slowly rotate in an accelerating way through the first disc 25, the first driving ring 26 and the second disc 27, the scroll spring 32 is compressed; when the spiral spring 32 is compressed to a certain amount, and the torque provided by the spiral spring 32 is larger than the torque for starting rotation of the second rotating shaft 36, the second driving ring 28 drives the second rotating shaft 36 to slowly rotate in an accelerated manner through the spiral spring 32, the third circular disc 31 and the first guide key strip 33; before the second rotating shaft 36 is not started to rotate, the first rotating shaft 4 drives the second disk 27 to rotate through the first disk 25 and the first driving ring 26 in the process of compressing the scroll spring 32, under the threaded matching of the second disk 27 and the second rotating shaft 36, the second disk 27 and the second driving ring 28 rotate along the second rotating shaft 36 axial direction to the fourth disk 35 direction, the second disk 27 drives the third disk 31 to rotate along the second rotating shaft 36 axial direction to the fourth disk 35 direction through the first ring 29 and the third driving ring 30, and the first spring 34 is compressed; since the first rotating shaft 4 is in a slow acceleration state, the amount of compression of the spiral spring 32 is relatively small, and the phase angle generated between the first rotating shaft 4 and the second rotating shaft 36 is relatively small, so that the distance of movement of the second driving ring 28 to the fourth disk 35 along the axial direction of the second rotating shaft 36 is relatively small, and thus the number of rotations of the first gear 17 driven by the second driving ring 28 is small and the rotational speed is slow, and as a result, after transmission through the transmission mechanism 10, the number of rotations of the fifth gear 22 driving the ring sleeve 41 is small and the rotational speed is slow, the centrifugal force generated by the second centrifugal plate 51 is small, and under the blocking force of the second guide block spring 62, the second centrifugal plate 51 cannot move in the direction away from the third rotating shaft 7, the second spring 47 is not compressed, the first centrifugal plate 43 is limited by the limiting strip 49, and the second centrifugal plate 51 is limited by the limiting ring 50. The second rotating shaft 36 rotating slowly and acceleratedly drives the third rotating shaft 7 to rotate slowly and acceleratedly through the bevel gear combination 6, the third rotating shaft 7 drives the fourth rotating shaft 9 to rotate slowly and acceleratedly through the two driving disks 42 and the first centrifugal plate 43, and the fourth rotating shaft 9 drives the wheels 14 to rotate slowly and acceleratedly through the differential 12 and the fifth rotating shaft 13. When the rotation speed provided by the third rotating shaft 7 is higher than 30km/h, although the centrifugal force generated by the first centrifugal plate 43 is higher than the force of the tension spring pulling the first centrifugal plate 43, the first centrifugal plate 43 can be ready to be separated from the centrifugal plate groove 53, but since the elastic coefficient of the second spring 47 is higher than that of the first guide spring 63 and the second spring 47 is not compressed, the limit strip 49 still limits the first centrifugal plate 43, so the first centrifugal plate 43 still cannot be separated from the centrifugal plate groove 53. Eventually the wheels 14 will slowly accelerate to the required speed and in the process the passengers on the bus will not experience a car sickness effect, since the bus is always in a state of slow acceleration.

When the bus is started in a rapid acceleration mode, the motor 1 drives the first rotating shaft 4 to rotate in a rapid acceleration mode through the driving shaft 2 and the speed reducer 3; when the first rotating shaft 4 drives the second driving ring 28 to rotate at a rapid speed through the first disc 25, the first driving ring 26 and the second disc 27, the scroll spring 32 is compressed; when the spiral spring 32 is compressed to a certain amount, and the torque provided by the spiral spring 32 is larger than the torque for starting rotation of the second rotating shaft 36, the second driving ring 28 drives the second rotating shaft 36 to rotate at a rapid acceleration speed through the spiral spring 32, the third circular disc 31 and the first guide key strip 33; before the second rotating shaft 36 is not started to rotate, the first rotating shaft 4 drives the second disk 27 to rotate through the first disk 25 and the first driving ring 26 in the process of compressing the scroll spring 32, under the threaded matching of the second disk 27 and the second rotating shaft 36, the second disk 27 and the second driving ring 28 rotate along the second rotating shaft 36 axial direction to the fourth disk 35 direction, the second disk 27 drives the third disk 31 to rotate along the second rotating shaft 36 axial direction to the fourth disk 35 direction through the first ring 29 and the third driving ring 30, and the first spring 34 is compressed; because the first rotating shaft 4 is in a rapid acceleration state, the compression amount of the scroll spring 32 is relatively large, and the phase angle generated between the first rotating shaft 4 and the second rotating shaft 36 is relatively large, so that the distance for the second driving ring 28 to move to the fourth circular disc 35 along the axial direction of the second rotating shaft 36 is relatively large, and thus the second driving ring 28 drives the first gear 17 to rotate for a large number of turns and rotate at a high speed, and as a result, after being transmitted by the transmission mechanism 10, the fifth gear 22 drives the ring sleeve 41 to rotate for a large number of turns and rotate at a high speed, the centrifugal force generated by the second centrifugal plate 51 is large, at this time, the centrifugal force generated by the second centrifugal plate 51 overcomes the blocking force of the second guide block spring 62, the second centrifugal plate 51 moves in a direction away from the third rotating shaft 7, under the matching of the inclined surface of the stepped plate 64 and the annular inclined surface 61 of the limit ring 50, the stepped plate 64 presses the limit ring 50, and the pressed limit ring 50 enables the first annular disc 48 to move towards the second annular disc, the second spring 47 will be compressed and the stop strip 49 will no longer stop the first centrifugal plate 43 and the stop collar 50 will no longer stop the second centrifugal plate 51. Since the speed of the bus cannot reach 30km/h immediately when the bus starts, the centrifugal force generated by the first centrifugal plate 43 is smaller than the force of the tension spring pulling the first centrifugal plate 43, the first centrifugal plate 43 still cannot be separated from the centrifugal plate groove 53, and the third rotating shaft 7 can drive the fourth rotating shaft 9 to rotate through the two driving disks 42 and the first centrifugal plate 43. The second rotating shaft 36 rotating at a rapid acceleration drives the third rotating shaft 7 to rotate at a rapid acceleration through the bevel gear assembly 6, the third rotating shaft 7 drives the fourth rotating shaft 9 to rotate at a rapid acceleration through the two driving disks 42 and the first centrifugal plate 43, and the fourth rotating shaft 9 drives the wheel 14 to rotate at a rapid acceleration through the differential 12 and the fifth rotating shaft 13.

When the bus suddenly accelerates in the running process, the motor 1 drives the first rotating shaft 4 to rotate in a sudden acceleration mode through the driving shaft 2 and the speed reducer 3; when the first rotating shaft 4 drives the second driving ring 28 to rotate at a rapid speed through the first disc 25, the first driving ring 26 and the second disc 27, the scroll spring 32 continues to be compressed; when the spiral spring 32 is compressed to a certain amount, and the torque provided by the spiral spring 32 is larger than the torque of the second rotating shaft 36 for rapid acceleration rotation, the second driving ring 28 drives the second rotating shaft 36 to rapidly accelerate rotation through the spiral spring 32, the third disc 31 and the first guide key strip 33; before the second rotating shaft 36 is not started to rotate, the first rotating shaft 4 drives the second disk 27 to rotate through the first disk 25 and the first driving ring 26 in the process of compressing the scroll spring 32, under the threaded fit of the second disk 27 and the second rotating shaft 36, the second disk 27 and the second driving ring 28 rotate along the second rotating shaft 36 axial direction to the fourth disk 35 direction, the second disk 27 drives the third disk 31 to rotate along the second rotating shaft 36 axial direction to the fourth disk 35 direction through the first ring 29 and the third driving ring 30, and the first spring 34 is continuously compressed; since the first rotating shaft 4 is in a rapid acceleration state, the amount of compression of the spiral spring 32 is large, and the phase angle generated between the first rotating shaft 4 and the second rotating shaft 36 is also large, so that the distance of the second driving ring 28 moving to the fourth circular disc 35 along the axial direction of the second rotating shaft 36 is large, and thus the second driving ring 28 drives the first gear 17 to rotate for a large number of revolutions and rotate at a high speed, and as a result, after being transmitted by the transmission mechanism 10, the fifth gear 22 drives the ring sleeve 41 to rotate for a large number of revolutions and rotate at a high speed, the centrifugal force generated by the second centrifugal plate 51 is large, and at this time, the centrifugal force generated by the second centrifugal plate 51 overcomes the blocking force of the second guide block spring 62, the second centrifugal plate 51 moves in a direction away from the third rotating shaft 7, and under the matching of the inclined surface of the stepped plate 64 and the inclined surface 61 of the limit ring 50, the stepped plate 64 presses the limit ring 50, and the pressed limit ring 50 moves the first circular disc 48 toward the second circular disc 46, the second spring 47 will be compressed and the stop strip 49 will no longer stop the first centrifugal plate 43 and the stop collar 50 will no longer stop the second centrifugal plate 51. The second rotating shaft 36 rotating at a rapid acceleration drives the third rotating shaft 7 to rotate at a rapid acceleration through the bevel gear assembly 6, the third rotating shaft 7 drives the fourth rotating shaft 9 to rotate at a rapid acceleration through the two driving disks 42 and the first centrifugal plate 43, and the fourth rotating shaft 9 drives the wheel 14 to rotate at a rapid acceleration through the differential 12 and the fifth rotating shaft 13. When the rotation speed of the third rotating shaft 7 is provided such that the speed of the automobile is greater than 30km/h, although the centrifugal force generated by the first centrifugal plate 43 is greater than the force of the tension spring pulling the first centrifugal plate 43, the first centrifugal plate 43 can be ready to be separated from the centrifugal plate groove 53, and at the same time, since the elastic coefficient of the second spring 47 is greater than that of the first guide spring 63 and the second spring 47 is compressed, the stopper bar 49 does not stop the first centrifugal plate 43, so that the first centrifugal plate 43 can be separated from the centrifugal plate groove 53. After the first centrifugal plate 43 is separated from the centrifugal plate groove 53, the third rotating shaft 7 cannot drive the fourth rotating shaft 9 to rapidly accelerate and rotate through the first centrifugal plate 43; when the second driving ring 28 moves to the limit position toward the fourth disk 35, the second driving ring 28 will not rotate with the ring sleeve 41 via the transmission mechanism 10, and then the centrifugal force of the second centrifugal plate 51 will not work, the second centrifugal plate 51 will return to the original position under the reset force of the second guide spring 62, the second centrifugal plate 51 moves towards the direction of the third rotating shaft 7, at this time, under the reset force of the second spring 47, the ring inclined surface 61 of the spacing ring 50 is always in contact fit with the inclined surface of the trapezoidal plate 64, the sharp-angled inclined surface 60 of the spacing bar 49 is always in contact fit with the inclined surface of the triangular notch 65, furthermore, under the restoring force of the second spring 47, the pointed inclined surface 60 of the stopper bar 49 presses the inclined surface of the triangular cutout 65, and the first centrifugal plate 43 moves in the direction of the third rotation shaft 7 under the pressing force until the first centrifugal plate 43 completely enters the centrifugal plate grooves 53 of the two drive disks 42. Then the third rotating shaft 7 drives the fourth rotating shaft 9 to rotate in an accelerated way through the two driving disks 42 and the first centrifugal plate 43; the fourth rotating shaft 9 drives the wheels 14 to rotate in an accelerated manner through the differential 12 and the fifth rotating shaft 13, and finally the wheels 14 are accelerated to a required speed. The design that first centrifugal plate 43 breaks away from centrifugal plate groove 53 in actuating mechanism 8 lies in, when the bus suddenly accelerates suddenly, first centrifugal plate 43 breaks away from centrifugal plate groove 53, in the time that first centrifugal plate 43 breaks away from centrifugal plate groove 53 for a short time, the speed of bus can not have very big promotion immediately, just so can give the urgent acceleration process of the passenger adaptation bus of easy carsickness, prevented that the passenger of easy carsickness from producing the situation of carsickness, and then guaranteed the safety of the passenger of easy carsickness.

After the bus stops, the second disc 27, the third disc 31 and the second rotating shaft 36 are restored to the original positions by the restoring force of the spiral spring 32 and the restoring force of the first spring 34.

In conclusion, the invention has the main beneficial effects that: the torque identification mechanism 5 identifies the rapid acceleration process of the bus, so that the second centrifugal plate 51 in the actuating mechanism 8 moves away from the third rotating shaft 7 under the centrifugal force, the limiting strip 49 can not limit the first centrifugal plate 43, and the first centrifugal plate 43 is separated from the centrifugal plate groove 53 under the centrifugal force; the design is that the speed of the bus can not be greatly improved immediately when the first centrifugal plate 43 is separated from the centrifugal plate groove 53 for a short time, so that passengers easy to feel sick can adapt to the rapid acceleration process of the bus, the passengers easy to feel sick are prevented from being sick, and the safety of the passengers easy to feel sick is further ensured. The invention has simple structure and better use effect.

Claims

1. A rear wheel drive system for an electric bus, characterized in that: the automobile differential comprises a motor, a driving shaft, a speed reducer, a torque identification mechanism, a bevel gear combination, an execution mechanism, a transmission mechanism, a differential, a fifth rotating shaft and wheels, wherein the motor, the speed reducer, the transmission mechanism and the differential are all arranged on an automobile chassis; one end of the driving shaft is connected with the motor shaft, and the other end of the driving shaft is provided with a speed reducer; the torque identification mechanism is connected with the speed reducer; one end of the bevel gear combination is connected with the torque recognition mechanism, and the other end of the bevel gear combination is provided with an execution mechanism; the differential is connected with the actuating mechanism; the two fifth rotating shafts are respectively connected with two output shafts of the differential mechanism; wheels are mounted at one end, which is not connected with the differential, of each fifth rotating shaft; the transmission mechanism is respectively matched with the torque identification mechanism and the actuating mechanism;

the torque identification mechanism comprises a first rotating shaft, a first disc, a first driving ring, a second disc, a second driving ring, a first ring, a third driving ring, a third disc, a volute spiral spring, a first key guide strip, a first spring, a fourth disc, a second rotating shaft, a ring cavity, a ring through groove and a first key guide hole, wherein one end of the first rotating shaft is arranged on the speed reducer, and the other end of the first rotating shaft is provided with the first disc; one end of the first driving ring is arranged on the disc surface of the first disc far away from the first rotating shaft, and the other end of the first driving ring is provided with a second disc; the second disc is provided with a shaft hole; the first disc is provided with a ring cavity; an annular through groove is formed in the disc surface of the first disc, which is far away from the first driving ring; the annular through groove is communicated with the annular cavity; the first ring is mounted in the ring cavity; one end of the third driving ring is arranged on the first ring, and the other end of the third driving ring penetrates through the annular through groove and is provided with a third circular disc; the third disc is provided with a shaft hole, and the inner circular surface of the shaft hole of the third disc is symmetrically provided with two first key guide holes; two first guide key strips are symmetrically arranged on the outer circular surface of the second rotating shaft; one end of the second rotating shaft penetrates through the shaft hole of the second disc, and the other end of the second rotating shaft penetrates through the shaft hole of the third disc; the two first guide key strips respectively penetrate through the corresponding first guide key holes; the fourth disc is provided with a shaft hole and is fixedly arranged on the outer circular surface of the second rotating shaft; the fourth disc is close to one end of the second rotating shaft far away from the first disc; the first spring is nested on the second rotating shaft, one end of the first spring is arranged on the third disc, and the other end of the first spring is arranged on the fourth disc; the second driving ring is arranged on the disc surface of the second disc far away from the first driving ring; one end of the scroll spring is arranged on the outer circular surface of the third disc, and the other end of the scroll spring is arranged on the inner circular surface of the second driving ring; the outer circular surface of one end of the second rotating shaft, which is close to the first disc, is provided with threads; the inner circular surface of the second disc shaft hole is provided with threads; the thread on the outer circular surface of one end of the second rotating shaft, which is close to the first disc, is matched with the thread on the inner circular surface of the shaft hole of the second disc; a plurality of ring teeth are uniformly distributed on the outer circular surface of the second driving ring along the axis direction of the second rotating shaft;

the actuating mechanism comprises a third rotating shaft, a fourth rotating shaft, a shaft sleeve, a ring sleeve, a driving disc, a first centrifugal plate, a first guide block, a second guide key strip, a second spring, a first ring disc, a limiting strip, a limiting ring, a second centrifugal plate, a second guide block, a centrifugal plate groove, a component cavity, a second ring disc, a second centrifugal through groove, a second guide groove, a first centrifugal through groove, a first guide groove, a second guide key hole, a second guide block spring, a first guide block spring, a trapezoid plate and a triangular notch, wherein the driving disc is uniformly arranged at one end, opposite to the third rotating shaft and the fourth rotating shaft; a plurality of centrifugal plate grooves are uniformly formed in the outer circular surface of the driving disc along the circumferential direction; the shaft sleeve is nested on the outer circular surfaces of the third rotating shaft and the fourth rotating shaft; two first centrifugal through grooves are symmetrically formed between the inner circular surface and the outer circular surface of the shaft sleeve; two first guide grooves are symmetrically formed in two side faces of each first centrifugal through groove; two second guide key strips are symmetrically arranged on the outer circular surface of the shaft sleeve where each first centrifugal through groove is located along the axial direction of the shaft sleeve; each second guide key strip is opposite to the corresponding first centrifugal through groove; the ring sleeve is nested on the outer circular surface of the shaft sleeve; the ring sleeve is provided with a component cavity; two second centrifugal through grooves are symmetrically formed between the inner circular surface of the component cavity and the outer circular surface of the ring sleeve; two second guide grooves are symmetrically formed in the two side faces of each second centrifugal through groove; two triangular notches are symmetrically formed in two sides of one end of the first centrifugal plate; two first guide blocks are symmetrically arranged on two side surfaces of the first centrifugal plate, which are provided with triangular notches; the two first guide block springs are respectively arranged on the corresponding first guide blocks; the two first centrifugal plates are respectively arranged in the corresponding first centrifugal through grooves; the first guide block and the first guide block spring which are arranged on each first centrifugal plate are positioned in the corresponding first guide grooves; one end of the first guide block spring, which is not connected with the first guide block, is connected with the groove surface of the first guide groove, which is close to the driving disc; one end of the first centrifugal plate, which is provided with the triangular notch, is positioned in the component cavity; the first centrifugal plate slides in the first centrifugal through groove through the first guide block; one end of the second centrifugal plate is provided with a trapezoidal plate; two second guide blocks are symmetrically arranged on two sides of the second centrifugal plate; the two second guide block springs are respectively arranged on the corresponding second guide blocks; the two second centrifugal plates are respectively arranged in the corresponding second centrifugal through grooves; the second guide block and the second guide block spring which are arranged on each second centrifugal plate are positioned in the corresponding second guide grooves; one end of the second guide block spring, which is not connected with the second guide block, is connected with the groove surface of the second guide groove, which is close to the component cavity; the second centrifugal plate slides in the second centrifugal through groove through a second guide block; one end of the second centrifugal plate with the trapezoidal plate is positioned in the component cavity; two second guide key holes are symmetrically formed in the inner circular surface of the first annular disc; two limiting strips are symmetrically arranged on the disc surface of the first annular disc; each limiting strip is opposite to the corresponding second key guide hole; the limiting ring is arranged on the disc surface of the first ring disc provided with the limiting strip; the two first ring discs are symmetrically nested on the shaft sleeve and positioned on two sides of the first centrifugal plate; each second guide key strip penetrates through a second guide key hole on the corresponding first ring plate; the limiting strip arranged on each first ring disc is matched with the inclined plane of the corresponding triangular notch; the limiting ring arranged on each first ring disc is matched with the inclined plane of the corresponding trapezoidal plate; the two second ring discs are symmetrically and fixedly arranged on the outer circular surface of the shaft sleeve; each second ring disc abuts against a respective side of the component cavity; the two second springs are symmetrically nested on the shaft sleeve; one end of each second spring is arranged on the first ring disc, and the other end of each second spring is arranged on the second ring disc; the first centrifugal plate is matched with the centrifugal plate grooves on the two driving disks;

the transmission mechanism comprises a first fixing plate, a second fixing plate, a first gear, a second gear, a third gear, a fourth gear, a bevel gear, a fifth gear, a sixth gear and bevel gears, wherein the first fixing plate is arranged on an automobile chassis; the second fixing plate is arranged on the first fixing plate; the first gear, the second gear and the third gear are all arranged on the first fixing plate through shafts; the first gear is meshed with ring teeth on the second driving ring; the second gear is respectively meshed with the first gear and the third gear; the fourth gear and the bevel gear are both arranged on the first fixing plate through the same shaft, and the bevel gear is positioned on the upper side of the fourth gear; the third gear is meshed with the fourth gear; the fifth gear and the sixth gear are both arranged on the second fixing plate through shafts; the fifth gear is provided with bevel teeth; the bevel gear is meshed with bevel teeth on the fifth gear; the fifth gear is meshed with the sixth gear; the sixth gear is matched with a ring sleeve in the actuating mechanism;

the outer circular surface of the position where the ring sleeve is matched with the sixth gear is provided with the grinding teeth along the circumferential direction of the ring sleeve; the sixth gear is meshed with the teeth on the ring sleeve;

one end of the bevel gear combination is connected with the second rotating shaft, and the other end of the bevel gear combination is connected with the third rotating shaft;

one end of the fourth rotating shaft is connected with an input shaft of the differential;

the first guide block spring is an extension spring; the elastic coefficient of the first guide block spring is smaller than that of the second spring;

the first centrifugal plate is made of light materials;

2. A rear wheel drive system for an electric bus according to claim 1, wherein: the end of the second rotating shaft close to the first disc is spaced from the first disc.

3. A rear wheel drive system for an electric bus according to claim 1, wherein: one end of the limiting strip, which is not connected with the first annular disc, is provided with a sharp-angled inclined surface; the limiting ring is provided with a ring inclined plane at one end which is not connected with the first ring disc.

4. A rear wheel drive system for an electric bus according to claim 1, wherein: the first centrifugal plate is provided with a triangular notch, and a space is reserved between one end of the first centrifugal plate, which is provided with the triangular notch, and the trapezoidal plate.

5. A rear wheel drive system for an electric bus according to claim 1, wherein: the first centrifugal plate is made of high-strength aluminum alloy.

6. A rear wheel drive system for an electric bus according to claim 3, wherein: when the second spring is not compressed, one end of the limiting strip with a sharp inclined surface is positioned at the sharp angle of the corresponding triangular notch.

7. A rear wheel drive system for an electric bus according to claim 3, wherein: when the second spring is not compressed, one end of the limiting ring with the annular inclined surface is positioned at the sharp corner where the trapezoidal plate is connected with the second centrifugal plate.

8. A rear wheel drive system for an electric bus according to claim 1, wherein: when the second spring is not compressed, the first guide block is located at the middle position of the first guide groove and the first guide block spring is in a stretched state, and each first centrifugal plate is located in the corresponding centrifugal plate groove of the two driving disks.

9. A rear wheel drive system for an electric bus according to claim 1, wherein: the bevel gear combination is composed of two meshed bevel gears with two rotation axes forming an included angle of 90 degrees.