CN211076204U

CN211076204U - Rear wheel structure with telescopic fulcrum shaft

Info

Publication number: CN211076204U
Application number: CN201922127301.1U
Authority: CN
Inventors: 蔡建备
Original assignee: Ningbo Luxiaobai Intelligent Technology Co ltd
Current assignee: Ningbo Luxiaobai Intelligent Technology Co ltd
Priority date: 2019-12-02
Filing date: 2019-12-02
Publication date: 2020-07-24
Anticipated expiration: 2029-12-02

Abstract

The utility model discloses a back wheel structure that counter roll can stretch out and draw back, including two back wheels and two counter rolls that become the angle setting, its characterized in that: the fulcrum comprises a first sleeve and a second sleeve, wherein one sleeve can be inserted into the other sleeve to realize relative expansion, one end, far away from the first sleeve, of the second sleeve is connected with the rear wheel, and the telescopic rear wheel structure of the fulcrum further comprises a telescopic positioning mechanism which relatively fixes the first sleeve and the second sleeve after the first sleeve and the second sleeve expand and contract. Compared with the prior art, the utility model has the advantages of: the support shaft connecting the rear wheel and the rear beam is arranged to be of a telescopic structure, so that when the moped is folded, the support shaft stretches and retracts to drive the rear wheel to move along the oblique line, the distance between the two directions is simultaneously enlarged or reduced, and the moped can be conveniently folded integrally.

Description

Rear wheel structure with telescopic fulcrum shaft

Technical Field

The utility model relates to a vehicle, in particular to a rear wheel structure with a telescopic fulcrum shaft for a moped.

Background

With the increasing congestion of urban traffic and the increasing emission of automobile exhaust, people tend to use light and environment-friendly vehicles. Meanwhile, with the improvement of living standard of people, the pace of work and life is accelerated, especially the fast pace life of a first-line city, in order to adapt to the fast pace life, people can use the moped as a travel tool, and the moped has the advantages of convenience in carrying, environmental protection and the like.

The common three-wheeled moped has the defects of complex overall structure, incapability of being folded, large occupied space during storage and inconvenience for carrying. For this reason, there are a number of foldable mopeds. The foldable electric bicycle disclosed in the chinese patent application No. 201721714453.6 is of a three-wheel structure, wherein a rear wheel bracket is provided at the rear end of a vehicle body underframe, and a seat bracket is hinged to the rear upper part of the vehicle body underframe; the handle bracket is a telescopic rod, and the handlebar is hinged at the upper end of the telescopic rod; the hinged part of the underframe of the car body is hinged at the lower part of the handle bracket; the vehicle body underframe is divided into a left underframe and a right underframe which are hinged together in an end-to-end intersecting manner; the seat support is a telescopic frame, and a folding seat and a folding handrail are arranged on the inner side of the middle part of the seat support; also disclosed in chinese patent application No. 201620941562.0 is a portable three-wheeled electric vehicle with a telescopic rotating handle, comprising a battery box, a front fork, a telescopic rotating handle, a front frame, a middle frame, a left rear fork, a right rear fork, a seat, a front wheel, a left rear wheel, a right rear wheel and an electric drive system, wherein the battery box is connected with the telescopic rotating handle, the front frame and the front fork, the front wheel is mounted on the front fork, the left rear axle and the right rear axle of the left rear wheel and the right rear wheel, and a motor is disposed on the front wheel.

Above-mentioned folding moped, when needs are accomodate folding, the wheel can't be withdrawed and accomodate, causes folding back volume too big, be not convenient for packing and transportation.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to the not enough of above-mentioned prior art, provide a counter roll can flexible rear wheel structure, can conveniently expand when accomodating folding, use.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: a rear wheel structure with telescopic fulcrum comprises two rear wheels and two fulcrum shafts arranged at an angle, and is characterized in that: the fulcrum comprises a first sleeve and a second sleeve, wherein one sleeve can be inserted into the other sleeve to realize relative expansion, one end, far away from the first sleeve, of the second sleeve is connected with the rear wheel, and the telescopic rear wheel structure of the fulcrum further comprises a telescopic positioning mechanism which relatively fixes the first sleeve and the second sleeve after the first sleeve and the second sleeve expand and contract.

According to one aspect of the present invention, one end of the first sleeve is open, one end of the second sleeve, which is far away from the rear wheel, is inserted into the open end of the first sleeve, the telescopic positioning mechanism comprises a chute formed on the second sleeve and a positioning hole formed on the first sleeve, the positioning hole corresponds to the chute, and the chute extends along the telescopic direction of the second sleeve relative to the first sleeve; the telescopic positioning mechanism further comprises a positioning component, and the positioning component comprises a bolt which can penetrate through the positioning hole and be clamped with the sliding groove.

For bolt location and plug, locating component still includes base and pull ring, the one end and the first sleeve pipe of base are fixed, the one end of bolt is passed the fixed one end of base and first sleeve pipe and can be with the spout cooperation, the other end of bolt passes the base and keeps away from first sheathed tube one end, the pull ring passes the part that first sleeve pipe one end was kept away from to the base with the bolt and is connected, the bolt keeps the trend of card income in the spout.

The automatic card of the bolt is gone into the spout for being convenient for, locating component still includes the spring, the spring setting is in the base and the cover is established in the bolt periphery, be provided with step portion on the bolt, the inboard butt of first sheathed tube one end is kept away from to step portion butt, the other end and the base on the one end of spring and the bolt.

According to the utility model discloses a flexible positioning mechanism includes clamping device, clamping device is including having elastic clamp cover, the clamp cover is cyclic annular, the centre gripping is located the sheathed tube periphery in the outside in first sleeve pipe and second sleeve pipe, the circumference that presss from both sides the cover is formed with the breach, thereby press from both sides the cover and can deform and make the breach diminish and press from both sides first sleeve pipe and second sleeve pipe tightly, or make the breach grow thereby make first sleeve pipe and second sleeve pipe loosen.

In order to facilitate the operation to deform the jacket, the telescopic positioning mechanism further comprises a movable shaft, a pin shaft and a fastening handle, wherein the jacket is provided with a first connecting seat and a second connecting seat which extend towards the direction of the outside of the jacket on two opposite sides of the notch respectively, the movable shaft penetrates through the first connecting seat and the second connecting seat, one side of the second connecting seat, which is far away from the first connecting seat, is provided with a groove, and the groove is arc-shaped and protrudes towards the direction of the first connecting seat; the fastening handle is arranged on one side, far away from the first connecting seat, of the second connecting seat and comprises a handle and two fastening shaft sleeves arranged at intervals, the handle is connected with the fastening shaft sleeves, two ends of the pin shaft are respectively rotatably connected with one of the fastening shaft sleeves, the movable shaft penetrates through the second connecting seat and then is connected with the pin shaft, the joint of the pin shaft and the fastening shaft sleeves is eccentric relative to the axis of the fastening shaft sleeves, the fastening shaft sleeves are supported in the grooves, therefore, the fastening shaft sleeves become cam structures and can drive the movable shaft to linearly move along the axis of the movable shaft when rotating, and the movable shaft can drive the first connecting seat to move relative to the second connecting seat and further drive the clamping sleeve to deform.

Preferably, a through hole is formed in the first connecting seat, a plug with a size larger than that of the through hole is arranged at one end, away from the second connecting seat, of the movable shaft, and the plug and the part, away from one side of the second connecting seat, of the first connecting seat are abutted to each other, so that the movable shaft can drive the first connecting seat to move towards the second connecting seat.

In order to enable the two sleeves to automatically stretch and retract when being loosened, the stretching and positioning mechanism further comprises a pneumatic push rod arranged in the first sleeve and the second sleeve, the pneumatic push rod comprises a push rod seat and a push rod, the push rod seat is fixedly connected with one of the first sleeve and the second sleeve, and the push rod is fixedly connected with the other one of the first sleeve and the second sleeve.

In order to clean the rear wheel conveniently, a mounting plate is arranged at the joint of the second sleeve and the rear wheel, the mounting plate and one end, close to the rear wheel, of the second sleeve are matched in shape and are fixedly connected with the second sleeve, and the mounting plate is detachably connected with the rear wheel.

Compared with the prior art, the utility model has the advantages of: the support shaft connecting the rear wheel and the rear girder is arranged into a telescopic structure, so that when the moped is folded, the support shaft stretches to drive the rear wheel to move along the oblique line, the distance between the support shaft and the rear girder is simultaneously enlarged or reduced, the moped can be conveniently folded integrally, the support shaft can be stretched and positioned at any position, and the requirements of a user on different rear wheel intervals can be met; the plug pin is inserted and pulled out to be clamped or separated from the sliding groove, so that the two sleeves can be conveniently operated to stretch and position; the clamping sleeve clamped outside the sleeve is utilized to respectively clamp and loosen the two sleeves when the clamping sleeve is deformed and reset, so that the two sleeves can be conveniently operated to stretch and position.

Drawings

Fig. 1 is a schematic view of a first embodiment of a rear wheel structure with a telescopic support shaft according to the present invention;

fig. 2 is an exploded view of the first embodiment of the retractable rear wheel structure of the support shaft of the present invention;

FIG. 3 is a schematic view of a second embodiment of the retractable rear wheel structure of the fulcrum of the present invention;

FIG. 4 is an exploded view of a rear wheel structure with a retractable pivot according to a second embodiment of the present invention;

fig. 5 is a schematic view of a clamping device of a second embodiment of the rear wheel structure with a telescopic support shaft according to the present invention;

fig. 6 is an exploded view of the clamping device of fig. 5.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

Example one

Referring to fig. 1 and 2, a rear wheel structure with a telescopic supporting shaft for a power-assisted vehicle includes two rear wheels 1, a supporting shaft 2, and a rear frame 3, the supporting shaft 2 having two shafts, and connecting each rear wheel 1 with the rear frame 3. The two support shafts 2 are disposed at an angle and have a V-shape as a whole, and the two support shafts 2 are not perpendicular to each other. The above structure is the prior art and is not described herein.

In order to make the two rear wheels 1 capable of being contracted when the moped is folded and expanded when the moped is unfolded, the support shaft 2 comprises a first sleeve 21 and a second sleeve 22, wherein one end of the first sleeve 21 is connected with the rear girder 3, the other end is open, one end of the second sleeve 22 is connected with the rear wheel 1, and the other end is inserted into the open end of the second sleeve 22, therefore, the second sleeve 22 can drive the rear wheel 1 to be contracted and expanded relative to the first sleeve 21.

In order to make the first sleeve 21 and the second sleeve 22 can be relatively fixed after being stretched in place, the utility model discloses a rear wheel structure still includes flexible positioning mechanism. The telescopic positioning mechanism comprises a sliding groove 221 formed in the second sleeve 22 and a positioning hole 211 formed in the first sleeve 21, the positioning hole 211 corresponds to the sliding groove 221, and the sliding groove 221 extends along the telescopic direction of the second sleeve 22 relative to the first sleeve 21, that is, the sliding groove 221 extends along one of the arms of the V-shape. The telescopic positioning mechanism further comprises a positioning assembly 23, the positioning assembly 23 comprises a base 231, a latch 232, a pull ring 233 and a spring 234, wherein the base 231 is fixed with the first sleeve 21, the latch 232 is partially disposed in the base 231, one end of the base 231 close to the first sleeve 21 is opened for the latch 232 to pass through, and the positioning hole 211 on the first sleeve 21 corresponds to the base 231, so that one end of the latch 232 can pass through the positioning hole 211 after passing through the base 231 and then be clamped into the sliding slot 221. The latch 232 also projects from an end of the base 231 remote from the first sleeve 21, and a tab 233 is connected to the end of the latch 232 so that the latch 232 can be operated by the tab 233. The spring 234 is disposed in the base 231 and sleeved on the outer circumference of the pin 232, and one end of the spring abuts against the step 2321 on the pin 232, and the other end of the spring abuts against the end of the base 231 away from the first sleeve 21. In the positioning state of the first sleeve 21 and the second sleeve 22, the spring 234 is in a natural state, and when the shaft 2 needs to be extended or contracted, the spring 234 is compressed. Meanwhile, the size of the step 2321 is larger than the opening of the end of the base 231 away from the first sleeve 21 for the insertion pin 232 to pass through, so that the insertion pin 232 is prevented from being separated from the base 231.

When the second sleeve 22 needs to be extended and retracted relative to the first sleeve 21, the pull ring 233 is pulled in a direction away from the first sleeve 21 to disengage the latch 232 from the sliding slot 221, at this time, since the first sleeve 21 and the second sleeve 22 are out of the limit, the second sleeve 22 can slide relative to the first sleeve 21 to extend and retract so as to fold or unfold the fulcrum 2, the spring 234 is compressed in the process, and therefore, after the first sleeve 21 and the second sleeve 22 are extended and retracted to the proper position, the pull ring 233 is released, the latch 232 automatically resets under the action of the spring 234 and passes through the positioning hole 211 again to be clamped with the sliding slot 221, so that the first sleeve 21 and the second sleeve 22 are relatively fixed.

In the above process, when the second sleeve 22 is unfolded relative to the first sleeve 21, the distance between the two rear wheels 1 and the first sleeve 21 is increased, and the distance between the two rear wheels 1 along the axis direction is also increased, that is, the distance change in two directions is realized at the same time, so that the size is significantly reduced, the volume of the moped after being folded is reduced, and the carrying or the transportation is facilitated. By adopting the structure, the fulcrum shaft can be positioned at any length in a telescopic way, so that the requirements of different use occasions or different users on the distance between the rear wheels 1 are met.

The joint of the second sleeve 22 and the rear wheel 1 is provided with a mounting plate 26, the mounting plate 26 can be in a flat plate shape, and is matched with the shape of one end of the second sleeve 22 close to the rear wheel 1, the second sleeve 22 and the rear wheel 1 are fixed, a mounting hole 261 is formed in the mounting plate 26, and a screw can pass through the mounting hole 261 and a hub (not shown) of the rear wheel 1, so that the second sleeve 22 and the rear wheel 1 can be detachably connected. When the cleaning is needed, the screw can be conveniently unscrewed, so that the rear wheel 1 is disassembled for cleaning; it will also be appreciated from the foregoing that the second sleeve 22 may also be conveniently detached from the first sleeve 21, and cleaned as well, when required.

Example two

Referring to fig. 3 and 4, in the present embodiment, the difference from the first embodiment is that the telescopic positioning mechanism includes a pneumatic push rod 24 disposed inside the first sleeve 21 and the second sleeve 22 and a clamping device 25 disposed on the outer periphery of the first sleeve 21.

The pneumatic push rod 24 includes a push rod seat 241 and a push rod 242, wherein the push rod seat 241 is fixedly connected to one of the first sleeve 21 and the second sleeve 22, and the push rod 242 is fixedly connected to the other of the first sleeve 21 and the second sleeve 22. This structure can also be used in embodiment one.

The clamping means 25 are preferably arranged at the periphery of the open end of the first sleeve 21. Referring to fig. 5 and 6, the clamping device 25 includes a collet 251 having elasticity, a movable shaft 252, a pin 253, and a fastening handle 254. The collet 251 is annular and clamped on the outer periphery of the first sleeve 21, a notch 2511 is formed in the circumferential direction of the collet 251, a first connecting seat 2512 and a second connecting seat 2513 are respectively formed in the collet 251 in an extending manner towards the outer part of the collet 251 on two opposite sides of the notch 2511, and the movable shaft 252 passes through the first connecting seat 2512 and the second connecting seat 2513. A through hole 2514 is formed in the first connecting seat 2512, and a plug 2521 with a size larger than that of the through hole 2514 is arranged at one end of the movable shaft 252 far away from the second connecting seat 2513, so that the plug can be abutted against the part of the periphery of the through hole 2514 on one side of the first connecting seat 2512 far away from the second connecting seat 2513. A recess 2515 is formed on one side of the second connection seat 2513 away from the first connection seat 2512, and the recess 2515 may be arc-shaped and protrudes towards the first connection seat 2512.

The fastening handle 254 is disposed on a side of the second connection seat 2513 away from the first connection seat 2512, and includes a handle 2541 and two fastening bushings 2542 arranged at intervals in an integrated manner, the handle 2541 is connected with the fastening bushings 2542, two ends of the pin shaft 253 are respectively rotatably connected with one of the fastening bushings 2542, the movable shaft 252 passes through the second connection seat 2513 and then is connected with the pin shaft 253, the pin shaft 253 is perpendicular to the movable shaft 252, and as shown in fig. 3 and 4, the two fastening bushings 2542 extend horizontally. The fastening sleeve 2542 is rotatably supported in the recess 2515, whereby the fastening sleeve 2542 can rotate in a vertical plane with the recess 2515 as a support.

The junction of the pin 253 and the tightening sleeve 2542 is eccentric with respect to the axis of the tightening sleeve 2542, whereby the tightening sleeve 2542 becomes a cam structure that converts the rotation of the tightening sleeve 2542 into a linear movement of the pin 253. When the fastening sleeve 2542 rotates, the pin 253 moves in a translational manner to move closer to or away from the second connecting seat 2513, so as to drive the movable shaft 252 to move in a translational manner along the axis direction. When the protruding portion of the fastening sleeve 2542, which is a cam, is rotated up to the highest point (the point on the surface of the fastening sleeve 2542 farthest from the eccentric connection), the fastening handle 254 and the pin 253 are locked, the handle 2541 is not loosened, and the pin 253 can be rotated only by rotating the handle 2541 up by applying force.

Because the end cap 2521 that the tip set up of loose axle 252, therefore, when it moves towards second connecting seat 2513, can drive first connecting seat 2512 and move to second connecting seat 2513 to make jacket 251 warp, breach 2511 diminishes, presss from both sides tight first sleeve 21 relative second sleeve 22, and when loose axle 252 removed to keeping away from second connecting seat 2513, first connecting seat 2512 reset, and first sleeve 21 and second sleeve 22 unclamped and can stretch out and draw back relatively. When the second sleeve 22 and the first sleeve 21 are released in the retracted position, the pneumatic pusher 24 is automatically ejected outwards by the action of the air pressure, with respect to the first sleeve 21, of the second sleeve 22, so that the fulcrum 2 is deployed. When the fulcrum shaft 2 needs to be folded, the gas spring of the pneumatic push rod 24 can be automatically pressed in by the dead weight of the moped.

Claims

1. A rear wheel structure with telescopic fulcrum comprises two rear wheels (1) and two fulcrum shafts (2) arranged at an angle, and is characterized in that: the support shaft (2) comprises a first sleeve (21) and a second sleeve (22), wherein one sleeve can be inserted into the other sleeve to realize relative extension and contraction, one end, far away from the first sleeve (21), of the second sleeve (22) is connected with the rear wheel (1), and the telescopic rear wheel structure further comprises a telescopic positioning mechanism which relatively fixes the first sleeve (21) and the second sleeve (22) after the first sleeve (21) and the second sleeve (22) are extended and contracted.

2. A retractable fulcrum rear wheel structure according to claim 1, wherein: one end of the first sleeve (21) is open, one end, far away from the rear wheel (1), of the second sleeve (22) is inserted into the open end of the first sleeve (21), the telescopic positioning mechanism comprises a sliding groove (221) formed in the second sleeve (22) and a positioning hole (211) formed in the first sleeve (21), the positioning hole (211) corresponds to the sliding groove (221), and the sliding groove (221) extends along the telescopic direction, opposite to the first sleeve (21), of the second sleeve (22); the telescopic positioning mechanism further comprises a positioning component (23), and the positioning component (23) comprises a bolt (232) which can penetrate through the positioning hole (211) to be clamped with the sliding groove (221).

3. A retractable fulcrum rear wheel structure according to claim 2, wherein: the positioning assembly (23) further comprises a base (231) and a pull ring (233), one end of the base (231) is fixed to the first sleeve (21), one end of the bolt (232) penetrates through the fixed end of the base (231) and the first sleeve (21) and can be matched with the sliding groove (221), the other end of the bolt (232) penetrates through one end, away from the first sleeve (21), of the base (231), the pull ring (233) is connected with the part, away from one end of the first sleeve (21), of the bolt (232) penetrating through the base (231), and the bolt (232) keeps a tendency of being clamped into the sliding groove (221).

4. A retractable fulcrum rear wheel structure according to claim 3, wherein: the positioning assembly (23) further comprises a spring (234), the spring (234) is arranged in the base (231) and sleeved on the periphery of the plug pin (232), a step portion (2321) is arranged on the plug pin (232), one end of the spring (234) is abutted to the step portion (2321) on the plug pin (232), and the other end of the spring (234) is abutted to the inner side of one end, far away from the first sleeve (21), of the base (231).

5. A retractable fulcrum rear wheel structure according to claim 1, wherein: the telescopic positioning mechanism comprises a clamping device (25), the clamping device (25) comprises a jacket (251) with elasticity, the jacket (251) is annular and is clamped on the outer periphery of the outer sleeve of the first sleeve (21) and the second sleeve (22), a notch (2511) is formed in the circumferential direction of the jacket (251), and the jacket (251) can deform to enable the notch (2511) to become small so as to clamp the first sleeve (21) and the second sleeve (22) or enable the notch (2511) to become large so as to enable the first sleeve (21) and the second sleeve (22) to be loosened.

6. A retractable fulcrum rear wheel structure according to claim 5, wherein: the telescopic positioning mechanism further comprises a movable shaft (252), a pin shaft (253) and a fastening handle (254), wherein the clamping sleeve (251) is provided with a first connecting seat (2512) and a second connecting seat (2513) which extend towards the direction of the outer part of the clamping sleeve (251) at two opposite sides of the notch (2511), the movable shaft (252) penetrates through the first connecting seat (2512) and the second connecting seat (2513), a groove (2515) is formed in one side, far away from the first connecting seat (2512), of the second connecting seat (2513), and the groove (2515) is arc-shaped and protrudes towards the direction of the first connecting seat (2512); the fastening handle (254) is arranged on one side, far away from the first connecting seat (2512), of the second connecting seat (2513), the fastening handle (254) comprises a handle (2541) and two fastening shaft sleeves (2542) which are arranged at intervals, the handle (2541) is connected with the fastening shaft sleeves (2542), two ends of the pin shaft (253) are rotatably connected with one fastening shaft sleeve (2542) respectively, the movable shaft (252) penetrates through the second connecting seat (2513) and then is connected with the pin shaft (253), the connection position of the pin shaft (253) and the fastening shaft sleeve (2542) is eccentric relative to the axis of the fastening shaft sleeve (2542), the fastening shaft sleeve (2542) is supported in the groove (2515), so that the fastening shaft sleeve (2542) is of a cam structure and can drive the movable shaft (252) to linearly move along the axis of the movable shaft (252) when rotating, and the movable shaft (252) can drive the first connecting seat (2512) to move relative to the second connecting seat (2513), Thereby deforming the collet (251).

7. A retractable fulcrum rear wheel structure according to claim 6, wherein: a through hole (2514) is formed in the first connecting seat (2512), a plug (2521) with the size larger than that of the through hole (2514) is arranged at one end, away from the second connecting seat (2513), of the movable shaft (252), and the plug (2521) and the peripheral part of the through hole (2514) on one side, away from the second connecting seat (2513), of the first connecting seat (2512) are abutted, so that the movable shaft (252) can drive the first connecting seat (2512) to move towards the second connecting seat (2513).

8. A retractable fulcrum rear wheel structure according to claim 5, wherein: the telescopic positioning mechanism further comprises a pneumatic push rod (24) arranged in the first sleeve (21) and the second sleeve (22), the pneumatic push rod (24) comprises a push rod seat (241) and a push rod (242), the push rod seat (241) is fixedly connected with one of the first sleeve (21) and the second sleeve (22), and the push rod (242) is fixedly connected with the other one of the first sleeve (21) and the second sleeve (22).

9. A retractable fulcrum rear wheel structure according to any one of claims 1 to 8, wherein: second sleeve pipe (22) and rear wheel (1) junction are provided with mounting panel (26), mounting panel (26) and second sleeve pipe (22) are close to the shape adaptation of rear wheel (1) one end and are connected fixedly with second sleeve pipe (22), mounting panel (26) and rear wheel (1) can dismantle the connection.