CN114754138A - Gear shifting mechanism of rear axle speed reducer of motor tricycle - Google Patents

Abstract

A gear shift mechanism of a rear axle reducer of a motor tricycle is characterized in that two shifting forks are respectively matched on the same shifting fork shaft in a sliding way, a guide pin is respectively arranged on the tail part of each shifting fork, a first guide groove for driving the first shifting fork to move and a second guide groove for driving the second shifting fork to move are arranged on a shifting block fixedly connected with one end of a shifting rotating shaft, a low-speed gear position and two neutral gears are arranged in the first guide groove, a neutral gear position, a medium-speed gear position and a high-speed gear position are arranged in the second guide groove, the guide pin on the tail part of the first shifting fork is matched in the first guide groove in a sliding way for driving the first shifting fork to be converted, the guide pin on the tail part of the second shifting fork is matched in the second guide groove in a sliding way for driving the second shifting fork to be converted, the shifting block is driven to rotate through the shifting rotating shaft, the guide pin of the first shifting fork is driven to move along the first guide groove at the same time, the guide pin of the second shifting fork moves along the second guide groove, and controlling the two shifting forks to finish the shifting action.

Description

Gear shifting mechanism of rear axle speed reducer of motor tricycle

Technical Field

The invention relates to the field of motorcycle speed reducers, in particular to a gear shifting mechanism of a rear axle speed reducer of a motor tricycle.

Background

The gear shifting of the rear axle speed reducer of the motor tricycle is realized by controlling a gear shifting mechanism of the rear axle speed reducer through a control cable by operating a gear shifting foot pedal, and the unique operation control mode is different from a structure that a rigid rod is connected between an operating rod and the gear shifting mechanism of an automobile. The existing gear shifting mechanism of the rear axle speed reducer of the motor tricycle is generally characterized in that a gear shifting fork is remotely controlled to work through a control cable to shift gears, the gear shifting mechanism controlled by one control cable at present only can control one fork to act, and one fork can only control the conversion of two gear speeds between two gears at most, so that the rear axle speed reducer of the motor tricycle can only be provided with two gear speeds, if the rear axle speed reducer needs to be provided with more than two gear speeds, at least two forks are required to be arranged, two forks are required to be provided with two gear shifting mechanisms, the two gear shifting mechanisms need to adopt two control cables to respectively control different forks, and the two control cables need to be respectively operated by two operating mechanisms, so that the gear shifting control structure is complex, the cost is increased, and the operation mode is inconvenient, even if an error occurs in the selection operation between the two operating mechanisms, a traffic accident may occur.

Disclosure of Invention

The invention aims to provide a gear shifting mechanism of a rear axle speed reducer of a motor tricycle, which aims at overcoming the defects in the prior art, and is characterized in that two shifting forks capable of moving independently are matched on a shifting fork shaft in a sliding manner, two guide grooves extending in a curve manner along the movement direction of a shifting block are arranged on the shifting block, so that guide pins of the two shifting forks are respectively matched with the two guide grooves in a sliding manner, and the guide pins of the two shifting forks can be driven to respectively move along the two guide grooves simultaneously through the rotation of the shifting block so as to control the two shifting forks to finish gear shifting action.

The purpose of the invention is realized as follows:

the utility model provides a gearshift of motor tricycle rear axle reduction gear, includes shift fork, declutch shift shaft, its characterized in that: the shifting fork is divided into a first shifting fork and a second shifting fork, the two shifting forks are respectively arranged on the same shifting fork shaft through the shaft hole sliding fit of the tail part, the tail part of each shifting fork is respectively provided with a convex guide pin, one end of a shifting rotating shaft is fixedly connected with a shifting block, the shifting block radially extends out of one side of the shifting rotating shaft, a first guide groove used for driving the first shifting fork to move and a second guide groove used for driving the second shifting fork to move are arranged on the shifting block, the two guide grooves respectively extend in a curve mode along the moving direction of the shifting block, a low-speed gear position and two idle gears are arranged in the first guide groove, the distance between the two idle gears and the axis of the shifting rotating shaft is the same and is larger than the distance between the low-speed gear and the center of the shifting rotating shaft, an idle gear, a medium-speed gear position and a high-speed gear are arranged in the second guide groove, and the distance between the three idle gears and the axis of the shifting rotating shaft is sequentially high-speed gear and medium-speed gear > air-speed > first guide pin Neutral gear position in groove, the uide pin on the first shift fork afterbody of sliding fit in the first guide way for drive first shift fork and change between low-speed gear position and neutral gear position, the uide pin on the second shift fork afterbody of sliding fit in the second guide way for drive second shift fork and change between neutral gear position, intermediate speed position, high-speed position, drive the shifting block through the pivot of shifting and rotate, the uide pin of driving first shift fork simultaneously removes along first guide way, and the uide pin of second shift fork removes along the second guide way, controls two shift forks and accomplishes the action of shifting.

The low-speed gear position of the first guide groove and the neutral gear position of the second guide groove are located on a first ray radially extending from the axis of the gear shifting rotating shaft, one neutral gear position of the first guide groove and the medium-speed gear position of the second guide groove are located on a second ray radially extending from the axis of the gear shifting rotating shaft, and the other neutral gear position of the first guide groove and the high-speed gear position of the second guide groove are located on a third ray radially extending from the axis of the gear shifting rotating shaft.

The central angle between the first ray and the third ray is 60 DEG, and the second ray bisects the central angle.

The gear shifting rotating shaft is provided with three gear locking grooves, and the three gear locking grooves correspond to the first ray, the second ray and the third ray respectively.

The three gear locking grooves are arranged on a gear locking block fixedly connected to the gear shifting rotating shaft, and the gear locking block is located above the gear shifting block and used for being matched with an elastic lock pin arranged on a rear axle reducer shell to lock a gear.

The gear shifting block is of a fan-shaped structure.

The other end of the gear shifting rotating shaft is provided with a spline for fixedly connecting a moment arm.

By adopting the scheme, the shifting forks of the shifting mechanism are divided into the first shifting fork and the second shifting fork, the two shifting forks are respectively matched on the same shifting fork shaft in a sliding manner through the shaft holes at the tail parts, the tail part of each shifting fork is respectively provided with the convex guide pin, one end of a shifting rotating shaft is fixedly connected with a shifting block, the shifting block radially extends out from one side of the shifting rotating shaft, the shifting block is provided with a first guide groove for driving the first shifting fork to move and a second guide groove for driving the second shifting fork to move, the two guide grooves respectively extend in a curve manner along the moving direction of the shifting block, the first guide groove is internally provided with a low-speed gear and two idle gears, the distance between the two idle gears and the axis of the shifting rotating shaft is the same and is larger than the distance between the low-speed gear and the center of the shifting rotating shaft, and the second guide groove is internally provided with an idle gear, an intermediate-speed gear and a middle-speed gear, A high-speed fender position, three keep off the position apart from the distance in the pivot axle center of shifting and be high-speed fender position > neutral gear position > intermediate speed fender position > the neutral gear position of first guide way in proper order, the uide pin on the first shift fork afterbody of sliding fit in the first guide way for drive first shift fork and shift between low-speed fender position and neutral gear position, the uide pin on the second shift fork afterbody of sliding fit in the second guide way for drive second shift fork is shifted between neutral gear position, intermediate speed fender position, high-speed fender position, drives the shifting block through the pivot of shifting and rotates, and the uide pin of driving first shift fork simultaneously moves along first guide way, and the uide pin of second shift fork moves along the second guide way, controls two shift forks and accomplishes the action of shifting. This gearshift only needs to drive the shifting block that shifts with a control cable remote control pivot and rotates, just can control two shift forks and move simultaneously, and when first shift fork accomplished the low-speed gear action, the second shift fork was located neutral position, and when the second shift fork accomplished medium speed or high-speed gear action, first shift fork was located neutral position, made the control and control simple and convenient of the motor tricycle rear axle reduction gear that sets up low-speed, medium speed, high-speed three position.

The low-speed gear position of the first guide groove and the neutral gear position of the second guide groove are located on a first ray radially extending from the axis of the gear shifting rotating shaft, one neutral gear position of the first guide groove and the medium-speed gear position of the second guide groove are located on a second ray radially extending from the axis of the gear shifting rotating shaft, and the other neutral gear position of the first guide groove and the high-speed gear position of the second guide groove are located on a third ray radially extending from the axis of the gear shifting rotating shaft. When the gear shifting rotating shaft drives the gear shifting block to rotate for gear shifting, the guide pin of the second shifting fork can be ensured to be just moved to the neutral position of the second guide groove, which is positioned in the first ray, when the guide pin of the first shifting fork is moved to the low-speed position of the first guide groove; when the guide pin of the second shifting fork moves to the middle-speed gear of the second guide groove, the guide pin of the first shifting fork just moves to the neutral gear of the first guide groove at the second ray; when the guide pin of the second shifting fork moves to the high-speed gear of the second guide groove, the guide pin of the first shifting fork just moves to the neutral gear of the first guide groove in the third ray. The structure ensures that the gear shifting process of one gear shifting block for simultaneously controlling the two shifting forks to move does not interfere with each other, and the gear shifting can be smoothly finished.

The central angle between the first ray and the third ray is 60 degrees, and the second ray bisects the central angle. Therefore, the shifting block completes the conversion among the low gear, the medium gear and the high gear, the maximum rotation range is only 60 degrees, the conversion between the low gear and the medium gear and the conversion between the medium gear and the high gear only need to rotate 30 degrees, and the rotation range of the shifting block is small, thereby being beneficial to operation and control.

And three gear locking grooves are arranged on the gear shifting rotating shaft and correspond to the first ray, the second ray and the third ray respectively. The three gear locking grooves are arranged on a gear locking block fixedly connected to the gear shifting rotating shaft, and the gear locking block is located above the gear shifting block and used for being matched with an elastic lock pin arranged on a rear axle reducer shell to lock a gear. The gear after gear shifting can be locked and cannot be out of gear.

The other end of the gear shifting rotating shaft is provided with a spline for fixedly connecting a moment arm. After the gear shifting mechanism is assembled in a rear axle speed reducer of the motor tricycle, the moment arm can be circumferentially and fixedly connected through the spline arranged on the gear shifting rotating shaft, the control inhaul cable which is operated is connected with the moment arm, and remote operation control gear shifting is realized.

The invention has unique design, can carry out remote control by only using one control inhaul cable under the condition that the rear axle speed reducer of the motor tricycle is provided with three low, middle and high forward gears, solves the problems of the prior art, ensures that the arrangement of the control inhaul cable is simpler and easier, can reduce the production cost, and avoids traffic accidents caused by misoperation.

Drawings

FIG. 1 is a schematic view of the structure of the present invention;

FIG. 2 is a side view of the present invention;

FIG. 3 is a schematic structural view of a shift block of the present invention;

FIG. 4 is a schematic view of the present invention engaged with a retarding mechanism;

FIG. 5 is a state diagram of the shift block of the present invention in a low gear;

FIG. 6 is a state diagram of the shift blocks of the present invention in a medium speed gear;

fig. 7 is a state diagram of the shift block of the present invention in a high gear position.

In the drawing, 1 is a shift fork shaft, 2 is a first shift fork, 3 is a second shift fork, 4 is a first guide pin, 5 is a second guide pin, 6 is a shift rotating shaft, 7 is a shift block, 8 is a first guide groove, 9 is a second guide groove, 10 is a low-speed gear, 11 is a medium-speed gear, 12 is a high-speed gear, 13 is a gear locking groove, 14 is a gear locking block, 15 is a first shift gear sleeve, 16 is a low-speed gear driven gear, 17 is a second shift gear sleeve, 18 is a medium-speed gear driving gear, 19 is a high-speed gear driving gear, 20 is a transmission shaft, 21 is an output shaft, 22 is a low-speed gear driving gear, 23 is an output gear, 24 is a medium-speed gear driven gear, and 25 is a high-speed gear driven gear.

Detailed Description

Referring to fig. 1 to 3, the gear shifting mechanism of the rear axle reducer of the motor tricycle comprises shifting forks and a shifting fork shaft 1, wherein the shifting forks are divided into a first shifting fork 2 and a second shifting fork 3, the two shifting forks are respectively matched on the same shifting fork shaft 1 in a sliding manner through shaft holes arranged at the tail parts of the two shifting forks, the two shifting forks are arranged side by side, a first protruding guide pin 4 is arranged at the tail part of the first shifting fork 2, and a second protruding guide pin 5 is arranged at the tail part of the second shifting fork 3. One end of a shift shaft 6 is fixedly connected with a shift shifting block 7, and the other end is provided with a spline for fixedly connecting a moment arm (not shown), so that the shift shaft 6 can be driven by the moment arm to rotate. The gear shifting block 7 is of a fan-shaped structure or a structure similar to the fan-shaped structure, so that materials can be saved, occupied space is reduced, and the purpose can be achieved by adopting the gear shifting block of a rectangular or trapezoidal structure. The gear shifting block 7 radially extends from one side of the gear shifting rotating shaft 6, and the small end of the gear shifting block 7 is fixedly connected with the gear shifting rotating shaft 6 and can be fixed by interference fit or welding or fixed by spline connection. The shift block 7 of shifting is last to set up the first guide way 8 that is used for driving first shift fork to remove and is used for driving the second guide way 9 that the second shift fork removed, and two guide ways are the curve extension along the direction of motion of the block 7 of shifting respectively, and two guide ways are all crooked to be similar to the curvilinear structure of "V" shape, and the opening opposite direction of two "V" shapes moreover, rotate through the block 7 of shifting, can make two shift forks of sliding fit on same declutch shift shaft 1 under the direction of two guide ways, carry out in opposite directions or reverse motion along declutch shift shaft 1 axial. Be equipped with a low-speed gear position 10, two neutral gears in the first guide way 8, wherein two neutral gears are the same apart from the distance in the pivot 6 axle center of shifting, and are greater than the distance in the pivot 6 centre of a circle of shifting of low-speed gear position 10, be equipped with an neutral gear position, an intermediate speed fender position 11, a high-speed fender position 12 in the second guide way 9, three keep off the position apart from the distance in the pivot 6 axle center of shifting for high-speed fender position > neutral gear position > intermediate speed fender position > the neutral gear position of first guide way 8 in proper order. The low-speed gear 10 of the first guide groove 8 and the neutral gear of the second guide groove 9 are located on a first ray radially extending from the axis of the shift rotating shaft 6, one neutral gear of the first guide groove 8 and the medium-speed gear 11 of the second guide groove 9 are located on a second ray radially extending from the axis of the shift rotating shaft 6, and the other neutral gear of the first guide groove 8 and the high-speed gear 12 of the second guide groove 9 are located on a third ray radially extending from the axis of the shift rotating shaft 6. The central angle between the first ray and the third ray is 60 °, and the second ray bisects the central angle, so that the rotational angle between the low-speed gear 10 and the intermediate-speed gear 11, and the rotational angle between the intermediate-speed gear 11 and the high-speed gear 12 are both 30 °. First uide pin 4 on the 2 afterbody of first shift fork of sliding fit in first guide way 8 for drive first shift fork 2 and shift between low-speed gear position and neutral gear position, second uide pin 5 on the 3 afterbody of sliding fit second shift fork in the second guide way 9 for drive second shift fork 3 and shift between neutral gear position, medium speed gear position, high-speed gear position, drive shifting block 7 through pivot 6 that shifts and rotate, drive first shift fork 2's first uide pin 4 simultaneously and remove along first guide way 8, and second shift fork 3's second uide pin 5 removes along second guide way 9, controls two shift forks and moves simultaneously and accomplishes the conversion of shifting. Three gear locking grooves 13 are arranged on the gear shifting rotating shaft 6, and the three gear locking grooves 13 are respectively positioned on a first ray, a second ray and a third ray, so that one gear locking groove corresponds to a low-speed gear 10 on the first ray and is used for locking the low-speed gear; the second gear locking groove corresponds to the middle gear 11 on the second ray and is used for locking the middle gear; the third gear lock groove corresponds to the high gear 12 on the third ray for locking the high gear. The three gear locking grooves 13 are arranged on a gear locking block 14 fixedly connected to the gear shifting rotating shaft 6, and the gear locking block 14 is located above the gear shifting block 7 and used for locking gears in cooperation with an elastic lock pin (not shown) arranged on a rear axle reducer casing. The gear after shifting can be locked and cannot be out of gear.

Referring to fig. 4 to 7, the gear shift mechanism is installed in a shell of a rear axle reducer of a motor tricycle, so that a gear shift rotating shaft 6 is perpendicular to a shifting fork shaft 1, a spline end of the gear shift rotating shaft 6 extends out of the shell to be fixedly connected with a moment arm spline, and a moment arm is connected with a gear shift operating mechanism (not shown) through a control cable. A first shifting fork 2 driven by a first guide groove 8 of a shifting block 7 is clamped on a first shifting gear sleeve 15, and the first shifting gear sleeve 15 is used for shifting between a low-speed driven gear 16 and a neutral gear; the second fork 3, which is driven by the second guide groove 9 of the shift gate 7, is clamped to a second shift sleeve 17, which second shift sleeve 17 is used for shifting between the intermediate gear drive gear 18 and the high gear drive gear 19. When the gear shifting control mechanism drives the gear shifting block 7 of the gear shifting mechanism to rotate to a low-speed gear through a control inhaul cable, the gear shifting block 7 drives the first guide pin 4 to move to a low-speed gear position of the first guide groove 8 through the first guide groove 8, the first shifting fork 2 moves along the shifting fork shaft 1, the first gear shifting sleeve 15 on the shifting output shaft 21 is combined with the low-speed gear driven gear 16, meanwhile, the gear shifting block 7 drives the second guide pin 5 to move to a neutral gear position of the second guide groove 9 through the second guide groove 9, the second shifting fork 3 moves along the shifting fork shaft 1, the second gear shifting sleeve 17 on the shifting transmission shaft 20 moves to the neutral gear position, low-speed gear shifting is completed, power is transmitted to the output shaft 21 from the low-speed gear driving gear 22 on the transmission shaft 20 through the low-speed gear driven gear 16 and the first gear shifting sleeve 15, and low-speed power is output from the output gear 23 on the output shaft 21. When the gear shifting control mechanism drives the gear shifting block 7 of the gear shifting mechanism to rotate to a medium-speed gear through a control cable, the gear shifting block 7 drives the first guide pin 4 to move to a neutral gear of the first guide groove 8 through the first guide groove 8, the first shifting fork 2 moves along the shifting fork shaft 1, the first gear shifting sleeve 15 on the shifting output shaft 21 is shifted to the neutral gear, meanwhile, the gear shifting block 7 drives the second guide pin 5 to move to a medium-speed gear of the second guide groove 9 through the second guide groove 9, the second shifting fork 3 moves along the shifting fork shaft 1, the second gear shifting sleeve 17 on the shifting transmission shaft 20 is combined with the medium-speed gear driving gear 18 to complete gear shifting of the medium-speed gear, power is transmitted to the output shaft 21 from the transmission shaft 20 through the second gear shifting sleeve 17, the medium-speed gear driving gear 18 and the medium-speed gear driven gear 24, and the medium-speed power is output from the output gear 23 on the output shaft 21. When the gear shifting control mechanism drives the gear shifting block 7 of the gear shifting mechanism to rotate to a high-speed gear through a control cable, the gear shifting block 7 drives the first guide pin 4 to move to another idle gear of the first guide groove 8 through the first guide groove 8, the first shifting fork 2 still is located in the idle gear without shifting the first gear shifting sleeve 15, meanwhile, the gear shifting block 7 drives the second guide pin 5 to move to the high-speed gear of the second guide groove 9 through the second guide groove 9, the second shifting fork 3 moves along the shifting fork shaft 1, the second gear shifting tooth 17 on the shifting transmission shaft 20 is combined with the high-speed gear driving gear 19 to complete high-speed gear shifting, power is transmitted to the output shaft 21 from the transmission shaft 20 through the second gear shifting sleeve 17, the high-speed gear driving gear 19 and the high-speed gear driven gear 25, and medium-speed power is output from the output gear 23 on the output shaft 21. The above is a process of sequentially increasing the speed from the low gear to the high gear, and conversely, the above is a process of sequentially decreasing the speed from the high gear to the low gear. Therefore, after the rear axle speed reducer of the motor tricycle is provided with three gears of low speed, medium speed and high speed, the gear shifting mechanism can be remotely controlled to complete gear shifting among the three gears by only using one control cable, so that the gear shifting operation is simple and convenient, and the production cost is reduced.

Claims (7)

1. The utility model provides a gearshift of motor tricycle rear axle reduction gear, includes shift fork, declutch shift shaft, its characterized in that: the shifting fork is divided into a first shifting fork and a second shifting fork, the two shifting forks are respectively arranged on the same shifting fork shaft through the shaft hole sliding fit of the tail part, the tail part of each shifting fork is respectively provided with a convex guide pin, one end of a shifting rotating shaft is fixedly connected with a shifting block, the shifting block radially extends out of one side of the shifting rotating shaft, a first guide groove used for driving the first shifting fork to move and a second guide groove used for driving the second shifting fork to move are arranged on the shifting block, the two guide grooves respectively extend in a curve mode along the moving direction of the shifting block, a low-speed gear position and two idle gears are arranged in the first guide groove, the distance between the two idle gears and the axis of the shifting rotating shaft is the same and is larger than the distance between the low-speed gear and the center of the shifting rotating shaft, an idle gear, a medium-speed gear position and a high-speed gear are arranged in the second guide groove, and the distance between the three idle gears and the axis of the shifting rotating shaft is sequentially high-speed gear and medium-speed gear > air-speed > first guide pin Neutral gear position in groove, the uide pin on the first shift fork afterbody of sliding fit in the first guide way for drive first shift fork and change between low-speed gear position and neutral gear position, the uide pin on the second shift fork afterbody of sliding fit in the second guide way for drive second shift fork and change between neutral gear position, intermediate speed position, high-speed position, drive the shifting block through the pivot of shifting and rotate, the uide pin of driving first shift fork simultaneously removes along first guide way, and the uide pin of second shift fork removes along the second guide way, controls two shift forks and accomplishes the action of shifting.

2. The gearshift mechanism for a rear axle reducer of a motor tricycle of claim 1, wherein: the low-speed gear position of the first guide groove and the neutral gear position of the second guide groove are located on a first ray radially extending from the axis of the gear shifting rotating shaft, one neutral gear position of the first guide groove and the medium-speed gear position of the second guide groove are located on a second ray radially extending from the axis of the gear shifting rotating shaft, and the other neutral gear position of the first guide groove and the high-speed gear position of the second guide groove are located on a third ray radially extending from the axis of the gear shifting rotating shaft.

3. The gearshift mechanism for a motor tricycle rear axle reducer according to claim 2, characterized in that: the central angle between the first ray and the third ray is 60 DEG, and the second ray bisects the central angle.

4. The gearshift mechanism for a rear axle retarder of a motor tricycle according to claim 1 or 2, wherein: the gear shifting rotating shaft is provided with three gear locking grooves, and the three gear locking grooves correspond to the first ray, the second ray and the third ray respectively.

5. The gearshift mechanism for a motor tricycle rear axle reducer according to claim 4, wherein: the three gear locking grooves are arranged on a gear locking block fixedly connected to the gear shifting rotating shaft, and the gear locking block is located above the gear shifting block and used for being matched with an elastic lock pin arranged on a rear axle reducer shell to lock a gear.

6. The gearshift mechanism for a rear axle reducer of a motor tricycle of claim 1, wherein: the gear shifting block is of a fan-shaped structure.

7. The gearshift mechanism for a rear axle reducer of a motor tricycle of claim 1, wherein: the other end of the gear shifting rotating shaft is provided with a spline for fixedly connecting a moment arm.

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