CN115122827A

CN115122827A - Rear axle power transmission device of electric tricycle

Info

Publication number: CN115122827A
Application number: CN202211060856.9A
Authority: CN
Inventors: 卜祥俊
Original assignee: Fengxian Zhonglian Electric Vehicle Technology Co ltd
Current assignee: Fengxian Zhonglian Electric Vehicle Technology Co ltd
Priority date: 2022-09-01
Filing date: 2022-09-01
Publication date: 2022-09-30
Anticipated expiration: 2042-09-01
Also published as: CN115122827B

Abstract

The invention discloses a rear axle power transmission device of an electric tricycle, which belongs to the technical field of rear axles of tricycles and comprises an axle bag, wherein two ends of the axle bag are connected with axle tubes, wheel hubs are arranged on the axle tubes, transmission shafts are arranged in the axle tubes, the end parts of the transmission shafts are provided with elastic parts and supporting parts, the axle tubes are also provided with mounting blocks and threaded sections, sensors are arranged in the mounting blocks, the threaded sections are connected with sleeves, the sleeves are connected with gears, the sleeves are rotatably connected with connecting rods, and driving parts and speed reducing mechanisms are arranged on the axle tubes. According to the invention, the supporting part and the elastic part are arranged between the hub and the transmission shaft, so that the problem that the elastic coefficient of the plate spring is large and is not enough to play a buffering role is solved through the elastic part in no-load, the hub and the transmission shaft are rigidly connected through the supporting part in heavy load, the buffering function of the plate spring is better received, and the sliding rods of the elastic part are uniformly arranged on the circumference, so that the adjustment of the hub in rotation is more balanced.

Description

Rear axle power transmission device of electric tricycle

Technical Field

The invention relates to the technical field of tricycle rear axles, in particular to a power transmission device for a rear axle of an electric tricycle.

Background

The rear axle is a rear drive shaft component of the vehicle power transmission. The differential motion mechanism consists of two half bridges, and can realize half bridge differential motion. In the case of a front-axle driven vehicle, the rear axle is only a trailing axle and only plays a role of load bearing. If the front axle is not a driving axle, the rear axle is a driving axle, and the driving, the speed reduction and the differential function are realized besides the bearing function.

The electric tricycle is not generally provided with a shock absorber because of the limitations of the application range, the self structure, the cost and the like, only a buffer part such as a plate spring and the like is arranged between a carriage and a rear axle, the shock absorption effect of the electric tricycle is mainly embodied under the condition of larger load, and the buffer effect can not be basically realized when the electric tricycle is in no load, the whole body is just like a rigid structure, the carriage is easy to vibrate on a bumpy road section to generate noise, and the long-term rigid bumping is easy to cause the fastening problem of a connecting piece.

Disclosure of Invention

In view of the above technical deficiencies, the present invention provides a rear axle power transmission device for an electro-tricycle, which switches different states between a full load state and a no load state through a supporting portion and an elastic portion of the rear axle power transmission device, so as to solve the problem that no buffer is available during no load state, and the slide bars are uniformly arranged so that the rear axle power transmission device can be stressed in a balanced manner.

In order to solve the technical problems, the invention adopts the following technical scheme: the invention provides a rear axle power transmission device of an electric tricycle, which comprises a bridge package, wherein two ends of the bridge package are connected with bridge pipes, one ends of the bridge pipes, which are far away from the bridge package, are provided with hubs, transmission shafts are arranged in the bridge pipes, an elastic part is arranged between the end parts of the transmission shafts and the hubs and is used for buffering and damping the hubs when the tricycle is in light load, a supporting part is also arranged between the hubs and the transmission shafts and is used for rigidly connecting the hubs and the transmission shafts when the tricycle is in heavy load, the bridge pipes are also provided with mounting blocks and threaded sections fixed on the bridge pipes, the mounting blocks are used for mounting plate springs on the tricycle, sensors are arranged in the mounting blocks, sleeves are in threaded connection with the threaded sections, gears are connected to the outer surfaces of the sleeves, one ends of the sleeves are rotatably connected with connecting rods which penetrate through the end parts of the bridge pipes and are connected with the supporting parts, and the connecting rods move to switch the states of the supporting parts, and the bridge pipe is also provided with a driving piece and a speed reducing mechanism which are respectively connected with the sensor and the gear.

Preferably, the first collar that transmission shaft was located and wheel hub is connected is located including the cover to elasticity portion, be equipped with on the first collar along its radial gliding slide bar, the slide bar is at first collar circumference evenly distributed, still be equipped with the elastic component between slide bar and the first collar, the end connection of transmission shaft has the installation pole, sliding connection has two sets of gag lever posts that are the vertical distribution on the installation pole, bolt fixedly connected with synchronization disc is passed through to one side of first collar, the spacing groove with gag lever post looks adaptation is seted up to synchronization disc one side, and the length of spacing groove is greater than the gag lever post, and gag lever post and synchronization disc are used for keeping transmission shaft and wheel hub's rotation synchronous, and do not influence both radial relative movement.

Preferably, the support portion includes a second mounting ring fixed in the hub and connected to one side of the first mounting ring, the second mounting ring is evenly distributed with supporting plates hinged with the second mounting ring on the circumference, the end part of each supporting plate is a circular arc surface, the axial line of the transmission shaft is superposed with the hinged rotating axial line of the supporting plate, the outer diameter surface of the transmission shaft is provided with spacing strips for limiting the supporting plate at intervals, a waist-shaped groove is arranged in the middle of the supporting plate along the length direction of the supporting plate, a pull ring and a connecting piece are sequentially sleeved on the transmission shaft from the bridge pipe to the second mounting ring, one side of the pull ring is fixedly connected with a connecting rod, the connecting piece is in a circular ring shape, and the ring body of the ring is S-shaped, a pin penetrating through the waist-shaped groove is arranged on the connecting piece, and a plurality of limiting blocks which are distributed circumferentially and are connected with the pull ring in a sliding manner are fixedly connected to one side of the connecting piece.

Preferably, the first mounting ring is provided with a plurality of circles of sliding rods which are uniformly distributed on the circumference, and the sliding rods in two adjacent circles are arranged in a staggered manner.

Preferably, one end of the sliding rod, which is close to the transmission shaft, is connected with an arc block, and the inner arc surface of the arc block is attached to the outer diameter surface of the end part of the transmission shaft.

Preferably, the inner arc surface of the arc block is smooth.

Preferably, the elastic member is a cylindrical spring.

Preferably, the end face of the synchronous disc is connected with a dust sealing cover plate for preventing dust and particles from entering the inner part and influencing the normal operation of the component.

The invention has the beneficial effects that: according to the invention, the supporting part and the elastic part are arranged between the hub and the transmission shaft, when the wheel hub is in no-load state, the problem that the elastic coefficient of the plate spring is large and is not enough to play a buffering role is solved through the elastic part, and when the load is large, the wheel hub and the transmission shaft are rigidly connected through the supporting part, so that the buffering function of the plate spring is better received, and the sliding rods of the elastic part are uniformly arranged on the circumference, so that the adjustment of the wheel hub during rotation is more balanced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic view of an overall structure of a rear axle power transmission device of an electro-tricycle according to an embodiment of the present invention.

Fig. 2 is a schematic half-section structure of the hub.

Fig. 3 is a schematic diagram of the split structure of the elastic part and the half-section structure of the pull ring and the connecting piece.

Fig. 4 is an enlarged schematic view of the structure of the area a in fig. 3.

FIG. 5 is a schematic view of a half-section of the tab and first collar.

Fig. 6 is an enlarged view of the structure of region B in fig. 5.

Fig. 7 is an enlarged view of the structure of region C in fig. 5.

Fig. 8 is a structural diagram illustrating a supporting state of the connecting member and the supporting plate.

Description of reference numerals: 1-bridge package, 2-bridge pipe, 3-hub, 4-transmission shaft, 5-elastic part, 6-supporting part, 7-mounting block, 8-thread section, 9-sleeve, 10-gear, 11-connecting rod, 12-arc block, 13-dust sealing cover plate, 501-first mounting ring, 502-sliding rod, 503-elastic part, 504-mounting rod, 505-limiting rod, 506-synchronous disk, 507-limiting groove, 601-second mounting ring, 602-supporting plate, 603-limiting strip, 604-waist-shaped groove, 605-pull ring, 606-connecting part, 607-pin and 608-limiting block.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

Example (b): as shown in fig. 1 to 8, the invention provides a rear axle power transmission device of an electric tricycle, which comprises an axle bag 1, wherein two ends of the axle bag 1 are connected with axle tubes 2, one end of each axle tube 2, which is far away from the axle bag 1, is provided with a wheel hub 3, a transmission shaft 4 is arranged in each axle tube 2, a differential mechanism is further arranged in each axle bag 1, the transmission shaft 4 penetrates through the whole axle tube 2, one end of each transmission shaft is connected with the differential mechanism, the other end of each transmission shaft extends out of the axle tube 2 and is connected with the wheel hub 3, an elastic part 5 is arranged between the end part of each transmission shaft 4 and the wheel hub 3, the elastic part 5 is used for buffering and damping the wheel hub 3 when the tricycle is lightly loaded, a supporting part 6 is further arranged between the wheel hub 3 and the transmission shaft 4 when the tricycle is heavily loaded, the axle tube 2 is further provided with a mounting block 7 and a thread section 8 fixed on the axle tube 2, the thread section 8 is in a hollow tubular shape and is fixedly connected to the outer diameter surface of the axle tube 2, the outer diameter surface of the threaded section 8 is provided with external threads, the mounting block 7 is used for mounting a plate spring on a tricycle, a sensor is arranged in the mounting block 7 and is a pressure sensor or a weight sensor, the sensor is positioned in the mounting block 7 and is connected with the plate spring and is used for detecting the pressure of the plate spring, the connection state between the hub 3 and the transmission shaft 4 is switched by detecting the pressure, a sleeve 9 is in threaded connection with the threaded section 8, the outer surface of the sleeve 9 is connected with a gear 10, one end of the sleeve 9 is rotatably connected with a connecting rod 11 which penetrates through the end part of the bridge pipe 2 and is connected with the supporting part 6, the end parts of the connecting rods 11 are commonly connected with a fixed ring, the fixed ring is rotatably connected with the end part of the sleeve 9, the other end of the connecting rod 11 is connected with the supporting part 6 through a bolt or a welding mode, the connecting rod 11 is moved to switch the state of the supporting part 6, and a driving part and a speed reducing mechanism which are respectively connected with the sensor and the gear 10 are also arranged on the bridge pipe 2, the driving part is preferably a motor, the output end of the motor is connected with a speed reducing mechanism, and the speed reducing mechanism is connected with the motor and a gear, so that the motor with smaller power can be driven, the cost is reduced, the motor is electrically connected with the sensor, the motor is started when certain pressure is reached by taking the sensor as a starting condition, and reversely rotates when the pressure is lower than a preset value, and the work of the supporting part 6 and the elastic part 5 is switched.

Furthermore, the elastic part 5 comprises a first mounting ring 501 sleeved on the transmission shaft 4 and connected with the hub 3, a sliding rod 502 sliding along the first mounting ring 501 is arranged on the first mounting ring 501, the sliding rod 502 is evenly distributed on the circumference of the first mounting ring 501, an elastic member 503 is further arranged between the sliding rod 502 and the first mounting ring 501, the compression range of the elastic member 503, i.e. the radial moving distance of the hub 3 relative to the transmission shaft 4, when the carriage is unloaded, the carriage body has a certain mass, therefore, the elastic member 503 positioned above the transmission shaft 4 can be compressed but not completely compressed, when the wheel enters a low-lying area, the elastic member 503 of the upper area part has a certain resilience to move downwards, so that the wheel suspension does not occur, but acts like a shock absorber, when the wheel enters the raised area, the elastic member 503 of the upper area part is further compressed due to impact force, the end of the transmission shaft 4 is connected with a mounting rod 504, the mounting rod 504 is connected with two sets of limiting rods 505 which are vertically distributed in a sliding mode, the two sets of limiting rods 505 are not intersected but are perpendicular to the axial projection of the transmission shaft 4, one side of the first mounting ring 501 is fixedly connected with a synchronous disc 506 through a bolt, one side of the synchronous disc 506 is provided with a limiting groove 507 matched with the limiting rods 505, the length of the limiting groove 507 is larger than that of the limiting rods 505, so that the first mounting ring 501 can move in the radial direction relative to the transmission shaft 4, the limiting rods 505 and the synchronous disc 506 are used for keeping the transmission shaft 4 and the hub 3 to rotate synchronously, and radial relative movement of the two is not influenced.

Further, be equipped with many circles of circumference evenly distributed's slide bar 502 on the first collar 501, and the slide bar 502 crisscross setting in two adjacent circles, the number of turns that sets up is more, and the space between two adjacent slide bars 502 with the round also can be cut apart into a plurality ofly, and then enables wheel hub 3 and wholly more balanced when removing, and is more stable.

Further, the one end that slide bar 502 is close to transmission shaft 4 is connected with circular arc piece 12, the intrados of circular arc piece 12 is laminated with the outer diameter face of transmission shaft 4 tip mutually, circular arc piece 12 increases the contact surface of slide bar 502 with transmission shaft 4, circular arc piece 12 laminates at transmission shaft 4 outer diameter face, the contact is relatively stable, avoid appearing the closed angle etc. between the contact, the intrados smooth processing of circular arc piece 12, smooth processing not only is polishing processing, still include through inlaying rotatable ball and similar mode friction reducing's processing mode on the laminating face at circular arc piece 12.

Further, the elastic member 503 is a cylindrical spring.

Further, the supporting portion 6 includes a second mounting ring 601 fixed in the hub 3 and connected to one side of the first mounting ring 501, the second mounting ring 601 is uniformly distributed with supporting plates 602 hinged to the second mounting ring 601 on its circumference, the end of the supporting plate 602 is an arc surface, and its axis coincides with the hinge rotation axis of the supporting plate 602, the arc surface is convenient for the whole surface to contact with the transmission shaft 4 after rotation, the supporting surface is larger and more continuous, the outer diameter surface of the transmission shaft 4 is provided with spacing strips 603 for limiting the supporting plate 602 at intervals, the spacing strips 603 do not limit the supporting plate 602, because the supporting plate 602 is contacted by the second mounting ring 601, the spacing strips 603 mainly function to reduce the suspended length of the supporting plate 602, i.e. the distance between the second mounting ring 601 and the transmission shaft 4, the suspended length of the supporting plate 602 is ensured to be reduced as much as possible within the movable space by the spacing strips 603, the middle part of the support plate 602 is provided with a waist-shaped groove 604 along the length direction thereof, the transmission shaft 4 is sequentially sleeved with a pull ring 605 and a connecting piece 606 from the bridge pipe 2 to the second mounting ring 601, one side of the pull ring 605 is fixedly connected with the connecting rod 11, the connecting piece 606 is annular, the annular body of the annular is S-shaped, the connecting piece 606 is provided with a pin 607 penetrating through the waist-shaped groove 604, the pin 607 penetrates through the waist-shaped groove 604, and two ends of the pin are connected with the connecting piece 606, the waist-shaped groove 604 is arranged to reserve a space for the movement of the support plate 602 when the support plate 602 switches between two different states, so as to prevent interference, one side of the connecting piece 606 is further fixedly connected with a plurality of limiting blocks 608 which are circumferentially distributed and are in sliding connection with the pull ring 605, and the limiting blocks 608 limit the relative movement of the pull ring 605 and the connecting piece 606 in the axial direction of the pull ring 605, but not limit the movement of the pull ring 605 and the connecting piece in the radial direction.

Furthermore, the end face of the synchronizing disk 506 is connected with a dust sealing cover plate 13, and the dust sealing cover plate 13 is connected to the outer side face of the synchronizing disk 506 through bolts, so as to prevent dust and particles from entering the inside and affecting the normal operation of the components.

When the pressure reaches a preset value (the preset value can be set according to actual conditions), the motor does not work, namely, the elastic part 5 is initially connected, at the moment, the elastic part 5 has the similar function with a shock absorber to perform shock absorption and buffering, when the pressure reaches the preset value, the motor rotates to drive the sleeve 9 to rotate through the transmission of the speed reducing mechanism, the sleeve 9 rotates under the action of the threads of the thread section 8, the sleeve 9 moves along the axial direction of the sleeve 9, the connecting rod 11 pushes the pull ring 605, the connecting piece 606 enables the support plate 602 to rotate from the inclined state to the state radially superposed with the second mounting ring 601, at the moment, the hub 3 is rigidly and fixedly connected with the transmission shaft 4 through the support plate 602, because the load is large, the plate spring has the buffering function, when the pressure is reduced to be lower than the preset value, the motor rotates reversely, and the support part 6 cancels the support state, and further, the elastic part 5 elastically supports the damping device to play a role in buffering and damping.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. The rear axle power transmission device of the electro-tricycle is characterized by comprising a bridge package (1), wherein two ends of the bridge package (1) are connected with a bridge pipe (2), one end, far away from the bridge package (1), of the bridge pipe (2) is provided with a wheel hub (3), a transmission shaft (4) is arranged in the bridge pipe (2), an elastic part (5) is arranged between the end part of the transmission shaft (4) and the wheel hub (3), the elastic part (5) is used for buffering and damping the wheel hub (3) when the tricycle is lightly loaded, a supporting part (6) is further arranged between the wheel hub (3) and the transmission shaft (4), the supporting part (6) is used for rigidly connecting the wheel hub (3) and the transmission shaft (4) when the tricycle is heavily loaded, the bridge pipe (2) is further provided with an installation block (7) and a thread section (8) fixed on the bridge pipe (2), and the installation block (7) is used for installing a plate spring on the tricycle, be equipped with the sensor in installation piece (7), threaded connection has sleeve (9) on screw thread section (8), the surface of sleeve (9) is connected with gear (10), the one end of sleeve (9) is rotated and is connected with connecting rod (11) that run through the tip of bridge pipe (2) and be connected with supporting part (6), and connecting rod (11) are removed and are used for switching the state of supporting part (6), still are equipped with driving piece and the reduction gears be connected with sensor and gear (10) respectively on bridge pipe (2).

2. The rear axle power transmission device of the electro-tricycle according to claim 1, wherein the elastic part (5) includes a first mounting ring (501) sleeved on the transmission shaft (4) and connected with the hub (3), the first mounting ring (501) is provided with slide bars (502) sliding along the radial direction of the first mounting ring, the slide bars (502) are uniformly distributed on the circumference of the first mounting ring (501), an elastic part (503) is further provided between the slide bars (502) and the first mounting ring (501), the end of the transmission shaft (4) is connected with a mounting bar (504), the mounting bar (504) is slidably connected with two sets of vertically distributed limiting bars (505), one side of the first mounting ring (501) is fixedly connected with a synchronization disc (506) through bolts, one side of the synchronization disc (506) is provided with a limiting groove (507) matched with the limiting bars (505), the length of the limiting groove (507) is larger than that of the limiting rod (505), and the limiting rod (505) and the synchronous disc (506) are used for keeping the rotation of the transmission shaft (4) and the hub (3) synchronous and do not influence the radial relative movement of the transmission shaft and the hub.

3. The electro-tricycle rear axle power transmission device according to claim 2, wherein the support portion (6) includes a second mounting ring (601) fixed in the wheel hub (3) and connected to one side of the first mounting ring (501), the second mounting ring (601) is evenly distributed with a support plate (602) hinged to the second mounting ring (601) on its circumference, the end of the support plate (602) is a circular arc surface, and its axis coincides with the hinge rotation axis of the support plate (602), the outer diameter surface of the transmission shaft (4) is provided with spacing strips (603) at intervals for limiting the support plate (602), the middle of the support plate (602) is provided with a waist-shaped groove (604) along its length direction, the transmission shaft (4) is sequentially sleeved with a pull ring (605) and a connecting piece (606) from the axle tube (2) to the second mounting ring (601), one side and connecting rod (11) fixed connection of pull ring (605), connecting piece (606) are the ring form, and the ring body of ring is the S type, be equipped with on connecting piece (606) and pass pin (607) of waist-shaped groove (604), one side of connecting piece (606) still fixedly connected with a plurality of be the circumference distribute and with pull ring (605) sliding connection' S stopper (608).

4. The electro-tricycle rear axle power transmission device as claimed in claim 2, characterized in that the first mounting ring (501) is provided with a plurality of circles of the sliding rods (502) which are evenly distributed on the circumference, and the sliding rods (502) in two adjacent circles are arranged in a staggered manner.

5. The electro-tricycle rear axle power transmission device as claimed in claim 2 or 4, characterized in that one end of the slide bar (502) close to the transmission shaft (4) is connected with an arc block (12), and the inner arc surface of the arc block (12) is attached to the outer diameter surface of the end of the transmission shaft (4).

6. The electro-tricycle rear axle power transmission device according to claim 5, characterized in that the inner arc surface of the arc block (12) is smooth.

7. The electro-tricycle rear axle power transmission device as claimed in claim 2, characterized in that the elastic member (503) is a cylindrical spring.

8. The electro-tricycle rear axle power transmission device according to claim 2, characterized in that the end face of the synchronizing disc (506) is connected with a dust cover plate (13).