WO2020038385A1 - 一种改进型自行车车架结构 - Google Patents

一种改进型自行车车架结构 Download PDF

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Publication number
WO2020038385A1
WO2020038385A1 PCT/CN2019/101702 CN2019101702W WO2020038385A1 WO 2020038385 A1 WO2020038385 A1 WO 2020038385A1 CN 2019101702 W CN2019101702 W CN 2019101702W WO 2020038385 A1 WO2020038385 A1 WO 2020038385A1
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WO
WIPO (PCT)
Prior art keywords
bearing
wheel hub
front wheel
rear wheel
crank
Prior art date
Application number
PCT/CN2019/101702
Other languages
English (en)
French (fr)
Inventor
俞孝爱
Original Assignee
上海科属美机械有限公司
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Publication date
Application filed by 上海科属美机械有限公司 filed Critical 上海科属美机械有限公司
Priority to EP19851757.5A priority Critical patent/EP3845444A4/en
Publication of WO2020038385A1 publication Critical patent/WO2020038385A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K19/00—Cycle frames
    • B62K19/30—Frame parts shaped to receive other cycle parts or accessories
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/02—Hubs adapted to be rotatably arranged on axle
    • B60B27/023—Hubs adapted to be rotatably arranged on axle specially adapted for bicycles
    • B60B27/026—Hubs adapted to be rotatably arranged on axle specially adapted for bicycles comprising quick release devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
    • B60B35/004—Mounting arrangements for axles
    • B60B35/005—Mounting arrangements for axles with adaptations at chassis structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K19/00—Cycle frames
    • B62K19/30—Frame parts shaped to receive other cycle parts or accessories
    • B62K19/34—Bottom brackets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K25/00—Axle suspensions
    • B62K25/02—Axle suspensions for mounting axles rigidly on cycle frame or fork, e.g. adjustably
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K3/00—Bicycles
    • B62K3/02—Frames
    • B62K3/04—Frames having a substantially horizontal top bar
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M3/00—Construction of cranks operated by hand or foot
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M3/00—Construction of cranks operated by hand or foot
    • B62M3/003—Combination of crank axles and bearings housed in the bottom bracket
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
    • B60B35/02—Dead axles, i.e. not transmitting torque
    • B60B35/04—Dead axles, i.e. not transmitting torque straight
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/10—Road Vehicles
    • B60Y2200/13—Bicycles; Tricycles

Definitions

  • the invention relates to an improved bicycle frame structure, which belongs to the technical field of bicycle accessories.
  • Bicycles are becoming more and more popular in life, and they are a daily mobility tool for most people. With the development of the economy, there are more and more styles of bicycles, more and more functions, and various comprehensive performances are getting better and better.
  • the bicycle is subject to certain wear and damage, resulting in damage to the bicycle; and due to the limitations of the performance of various components of the bicycle, the overall performance of the bicycle needs to be improved.
  • the frame and fork are the most important components of a bicycle. They largely determine the main indicators of the bicycle's weight, durability, and overall rigidity. The current bicycle frames and forks suffer from unreasonable stress.
  • the bearings of the current front and rear wheels of the bicycle are installed in the hub, so the distance between the bearings is not wide enough.
  • the main shaft in the hub will deform and bend.
  • the rigidity of the wheel set is deteriorated, and the bearing devices of current bicycle cranks are built into the five-way. Therefore, the main shaft size of the crank device is also restricted by the bearing inner diameter and cannot be further expanded, and because the bearings are built into the five-way Therefore, the size of the bearing device is also restricted by the inner diameter of the five-way and cannot be further expanded.
  • these unreasonable structures weaken the overall rigidity of the bicycle during running, reduce the riding quality, and reduce the durability of the hub. degree.
  • the invention overcomes the shortcomings of the prior art, provides an improved bicycle frame structure, improves riding quality and internal congestion of the hub, simplifies the hub structure, and reduces the difficulty of manufacturing the hub.
  • an improved bicycle frame structure including a frame, a rear fork leg, a front fork leg and a five-way, the rear fork leg and the front fork
  • the feet are fixedly arranged at the rear end and the front end of the frame, respectively.
  • the five links are located at the lower end of the middle of the frame.
  • the rear fork fork and front fork fork are both provided with internal bearing positions, so that the rear wheel bears the bearing and the front wheel bearing.
  • the front fork forks and the front wheel bearings are fixed through the front wheel hub fixing pins.
  • the front wheel hub pins are sleeved with front wheel hubs, and the front wheel hubs are respectively correspondingly assembled in respective inner bearing positions.
  • the rear wheel hub pin is sleeved with the rear wheel hub.
  • the rear wheel hub does not need to be installed in the rear wheel hub pin.
  • Corresponding bearing outer bearing positions are provided at both ends of the five-way horizontal straight pipe, and crank bearings are sleeved on the outer bearing positions, and a crank is sleeved on the outer side of the crank bearing. Horizontal straight pipe setting , And the two cranks are fixedly connected.
  • Both the front wheel hub fixing pin and the rear wheel hub fixing pin are composed of a pin shaft provided with a threaded end and a nut capable of matching the threaded end of the pin shaft.
  • the present invention has the following beneficial effects.
  • the front wheel bearing and the rear wheel bearing bearing are respectively installed in the front wheel hub and the rear wheel hub, and are also respectively mounted on the front wheel spindle and the rear wheel spindle, and in the present invention
  • the distance between the front wheel bearing and the rear wheel bearing is much wider than the distance between the front wheel bearing and the rear wheel bearing in a common structure bicycle.
  • the fork structure improves the rigidity of the front and rear wheels, and improves the durability of the bearing.
  • the hub of the front and rear wheels of the present invention does not need a shaft center, and the structure is simpler. Therefore, the manufacturing cost of the front and rear wheel hubs of the present invention is also more low.
  • crank bearing is installed in the five links and at the same time on the crank shaft. It is obvious that the pitch of the crank bearings in ordinary bicycles is relatively narrow, and the size of the bearings is affected by the frame. The size of the crank shaft cannot be further enlarged due to the restriction of the flow, and the size of the crank shaft cannot be further enlarged. This reduces the crank's overall resistance to bending and torsion. While the crank bearing of the bicycle in the present invention is installed outside the five-way and is installed in the crank bearing position, it is obvious that the pitch of the crank bearing in the present invention is wider, and the size of the bearing is not limited by the five-way. It can be further expanded, and the size of the crank axis is not limited by the bearing, so it can be further expanded, thereby improving the bending resistance and torsion resistance of the crank.
  • the invention has a reasonable structure, strengthens the overall rigidity during running, improves the riding quality, and improves the durability of the hub.
  • FIG. 1 is a schematic structural diagram of the present invention.
  • FIG. 2 is an assembly diagram of a front fork leg and a front wheel bearing in the present invention.
  • FIG. 3 is an assembly schematic diagram of a front wheel bearing and a front wheel hub in the present invention.
  • FIG. 4 is a schematic diagram of an assembly structure of a front wheel bearing and a front wheel hub in the present invention.
  • FIG. 5 is an assembly schematic diagram of a rear fork fork foot and a rear wheel bearing bearing in the present invention.
  • FIG. 6 is an assembly schematic diagram of a rear wheel bearing and a rear wheel hub in the present invention.
  • FIG. 7 is a schematic diagram of an assembly structure of a rear wheel bearing bearing and a rear wheel hub in the present invention.
  • FIG. 8 is a schematic assembly diagram of a five-way joint with a crank bearing and a crank in the present invention.
  • FIG. 9 is a schematic diagram of an assembly structure of a five-way joint with a crank bearing and a crank in the present invention.
  • 1 is the frame
  • 2 is the fork fork leg
  • 3 is the front fork leg
  • 4 is the five-way
  • 5 is the front wheel bearing
  • 6 is the rear wheel bearing bearing
  • 7 is the crank bearing
  • 8 is the front wheel hub
  • 9 is the rear wheel hub
  • 10 is the crank
  • 11 is the front wheel hub pin
  • 12 is the rear wheel hub pin.
  • an improved bicycle frame structure includes a frame 1, a rear fork leg 2, a front fork leg 3, and a five link 4.
  • the rear fork leg 2 and the front The fork forks 3 are fixedly arranged at the rear end and the front end of the frame 1, respectively.
  • the five links 4 are located at the lower end of the middle of the frame 1.
  • the rear fork legs 2 and the front fork legs 3 are provided with internal bearing positions, so that The rear wheel bearing 6 and the front wheel bearing 5 are respectively fitted in respective inner bearing positions.
  • the front fork foot 3 and the front wheel bearing 5 are fixed through the front wheel hub fixing pin 11, and the front wheel hub is fixed.
  • a front wheel hub 8 is sleeved on the pin 11.
  • the front wheel hub 8 does not need to be provided with a corresponding bearing.
  • the fork fork 2 and the rear wheel bearing bearing 6 are fixed through the rear wheel hub fixing pin 12.
  • a rear wheel hub 9 is sleeved on the wheel hub fixing pin 12.
  • the rear wheel hub 9 does not need to be provided with a corresponding bearing.
  • the two ends of the horizontal straight pipe of the five links 4 are provided with external bearing positions. Both are equipped with a crank bearing 7, and the crank bearing 7 is sheathed with a crank 10 on the outside, and the main shaft of the crank 10 is arranged through the horizontal straight pipe of the five links 4. And two cranks 10 is fixedly connected.
  • the front wheel hub fixing pin 11 and the rear wheel hub fixing pin 12 are each composed of a pin shaft provided with a threaded end and a nut capable of matching the threaded end of the pin shaft.
  • the front fork leg 3 has an inner bearing position 3a
  • the outer ring 5a of the front wheel bearing 5 is respectively installed in the inner bearing position 3a of the front fork leg
  • the two end faces 8a of the front wheel hub 8 are respectively It is in contact with the inner end surface of the inner ring 5 b of the front wheel bearing 5.
  • the front wheel hub fixing pin 11 has a threaded end 11a that matches the internal thread 11c in the threaded cover 11b. The threaded end 11a of the front wheel hub fixing pin 11 passes through the front wheel hub 8 and the front wheel bearing 5 and the thread cover 11b.
  • the rear fork leg 2 has an inner bearing position 2a
  • the outer ring 6a of the rear wheel bearing bearing 6 is installed in the inner bearing position 2a of the rear fork leg, and the two end faces 9a of the rear hub 9
  • the inner end surfaces of the inner ring 6 b of the rear wheel bearing 6 are in contact with each other.
  • the rear wheel hub fixing pin 12 has a threaded end 12a adapted to the internal thread 12c in the screw cover 12b.
  • the thread end 12a of the rear wheel hub fixing pin 12 passes through the rear wheel hub 9 and the rear wheel bearing bearing 6 and the thread cover 12b.
  • the frame bracket 5 has an outer bearing position 4a
  • the crank 10 has an inner bearing position 10a.
  • the inner ring 7b of the crank bearing 7 is installed on the five-way outer bearing position 4a
  • the outer ring 7a of the crank bearing 7 is installed in the crank inner bearing position 10a.
  • the front wheel bearing and the rear wheel bearing bearing are respectively installed in the front wheel hub and the rear wheel hub, and are also respectively mounted on the front wheel spindle and the rear wheel spindle.
  • the distance between the front wheel bearing and the rear wheel bearing is much wider than the distance between the front wheel bearing and the rear wheel bearing in a common structure bicycle.
  • the bicycle frame and the fork structure The rigidity of the front and rear wheels is improved, the durability of the bearing is improved, and the hub of the front and rear wheels of the present invention does not need an axis inside, and the structure is simpler. Therefore, the manufacturing cost of the hubs of the front and rear wheels of the present invention is also lower.
  • crank bearing is installed in the five-way and at the same time on the crank shaft. It is obvious that the distance between the crank bearings in the ordinary bicycle is relatively narrow, and the size of the bearing is affected by the frame five-way. Restricted and cannot be further expanded, and the size of the crank axis is also limited by the bearing and cannot be further expanded. This reduces the crank's overall resistance to bending and torsion. While the crank bearing of the bicycle in the present invention is installed outside the five-way and is installed in the crank bearing position, it is obvious that the pitch of the crank bearing in the present invention is wider, and the size of the bearing is not limited by the five-way. It can be further expanded, and the size of the crank axis is not limited by the bearing, so it can be further expanded, thereby improving the bending resistance and torsion resistance of the crank.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Axle Suspensions And Sidecars For Cycles (AREA)
  • Steering Devices For Bicycles And Motorcycles (AREA)

Abstract

一种改进型自行车车架结构，包括车架（1）、后叉叉脚（2）、前叉叉脚（3）和五通（4），后叉叉脚（2）和前叉叉脚（3）分别固定设置在车架（1）的后端和前端，五通（4）位于车架（1）中部下端。后叉叉脚和前叉叉脚均设置有内轴承位，使得后轮承载轴承（6）和前轮轴承（5）分别对应装配在各自的内轴承位里，前叉叉脚和前轮轴承通过前轮花鼓固定销（11）穿接固定，前轮花鼓固定销上套装有前轮花鼓（8），前轮花鼓内无需设置对应的轴承，后叉叉脚和后轮承载轴承通过后轮花鼓固定销（12）穿接固定，后轮花鼓固定销上套装有后轮花鼓（9），后轮花鼓内无需设置对应的轴承，五通的横直通管两端均设置有外轴承位，外轴承位上均套装有曲柄轴承（7），曲柄轴承外侧套装有曲柄（10），曲柄的主轴贯穿五通的横直通管设置，并将两个曲柄固定连接。该车架结构简化了花鼓结构，降低了花鼓的制造难度，提升了曲柄的抗弯曲性能和抗扭性能。

Description

一种改进型自行车车架结构 技术领域
本发明一种改进型自行车车架结构，属于自行车配件技术领域。
背景技术
自行车在生活中越来越普及，是大多数人的日常代步工具。随着经济的发展，自行车的样式也越来越多，功能也越来越多，各种综合性能也越来越好。自行车在使用的过程中，因遇到各种不利的因素，使得自行车发生一定的磨损以及损害，从而造成自行车发生损坏；而且由于自行车各部件的性能的局限作用，自行车的整体性能还有待改进。众所周知，车架和前叉是自行车最主要的部件，它们很大程度上决定了自行车的重量、耐用性、整体刚性等主要指标。目前的自行车架和前叉存在受力不合理的问题，首先目前的自行车前后轮的轴承都安装于花鼓内，因此轴承之间的间距不够宽，在受负载后花鼓内的主轴会变形弯曲，使得轮组的刚性变差，而且目前的自行车曲柄的轴承装置都内置于五通之内，所以曲柄装置的主轴尺寸也受到轴承内径的制约而无法进一步扩大，并且因为轴承内置于五通之内，所以轴承装置的尺寸也受到五通内径的制约而无法进一步扩大，综上所述，这些不合理的结构，弱化了自行车运行时的整体刚性，降低了骑行品质，并且降低了花鼓的耐用度。
发明内容
本发明克服了现有技术存在的不足，提供了一种改进型自行车车架结构，提高了骑行品质和花鼓的内拥堵，简化了花鼓结构，降低了花鼓的制造难度。
为了解决上述技术问题，本发明采用的技术方案为：一种改进型自行车车架结构，包括车架、后叉叉脚、前叉叉脚和五通，所述后叉叉脚和前叉叉脚分别固定设置在车架的后端和前端，所述五通位于车架中部下端，所述后叉叉脚和前叉叉脚均设置有内轴承位，使得后轮承载轴承和前轮轴承分别对应装配在各自的内轴承位里，所述前叉叉脚和前轮轴承通过前轮花鼓固定销穿接固定，所述前轮花鼓固定销上套装有前轮花鼓，所述前轮花鼓内无需设置对应的轴承，所述后叉叉脚和后轮承载轴承通过后轮花鼓固定销穿接固定，所述后轮花鼓固定销上套装有后轮花鼓，所述后轮花鼓内无需设置对应的轴承，所述五通的横 直通管两端均设置有外轴承位，所述外轴承位上均套装有曲柄轴承，所述曲柄轴承外侧套装有曲柄，所述曲柄的主轴贯穿五通的横直通管设置，并将两个曲柄固定连接。
所述前轮花鼓固定销和后轮花鼓固定销均由设置有螺纹端的销轴和能与销轴的螺纹端匹配的螺帽组成。
本发明与现有技术相比具有以下有益效果。
1、相对于普通结构的自行车之中，前轮轴承和后轮承载轴承分别安装于前轮花鼓和后轮花鼓内，同时也分别安装与前轮主轴和后轮主轴之上，而在本发明中的自行车车架与前叉之中，前轮轴承的间距与后轮承载轴承的间距均远远宽于普通结构自行车中的前轮轴承的间距与后轮承载轴承的间距，自行车架和前叉结构提升了前后轮的刚性，提升了轴承的耐用性，并且本发明中的前后轮的花鼓内部不需要轴心，结构也更简单，因此本发明中的前后轮的花鼓的制造成本也更低。
2、现对于普通自行车之中，曲柄轴承安装在五通之内，同时安装在曲柄主轴之上，显而易见的是，普通自行车之中的曲柄轴承的间距比较窄，并且轴承的尺寸受到车架五通的限制而无法进一步扩大，曲柄轴心的尺寸也受到轴承限制而无法进一步扩大。从而降低了曲柄的整体抗弯曲性能和抗扭性能。而本发明中的自行车的曲柄轴承安装与五通外侧，并且安装在曲柄轴承位之内，显而易见的是，本发明中的曲柄轴承的间距更宽，并且轴承的尺寸不受五通的限制从而可以进一步扩大，并且曲柄轴心的尺寸也不受轴承的限制从而可以进一步扩大，进而提升了曲柄的抗弯曲性能和抗扭性能。
本发明结构合理，强化了运行时的整体刚性，提高了骑行品质，并且提高了花鼓的耐用度。
附图说明
下面结合附图对本发明做进一步的说明。
图1为本发明的结构示意图。
图2为本发明中前叉叉脚与前轮轴承的装配示意图。
图3为本发明中前轮轴承与前轮花鼓的装配示意图。
图4为本发明中前轮轴承与前轮花鼓的装配结构示意图。
图5为本发明中后叉叉脚与后轮承载轴承的装配示意图。
图6为本发明中后轮承载轴承与后轮花鼓的装配示意图。
图7为本发明中后轮承载轴承与后轮花鼓的装配结构示意图。
图8为本发明中五通与曲柄轴承和曲柄的装配示意图。
图9为本发明中五通与曲柄轴承和曲柄的装配结构示意图。
图中：1为车架、2为后叉叉脚、3为前叉叉脚、4为五通、5为前轮轴承、6为后轮承载轴承、7为曲柄轴承、8为前轮花鼓、9为后轮花鼓、10为曲柄、11为前轮花鼓固定销、12为后轮花鼓固定销。
具体实施方式
如图1～图9所示，本发明一种改进型自行车车架结构，包括车架1、后叉叉脚2、前叉叉脚3和五通4，所述后叉叉脚2和前叉叉脚3分别固定设置在车架1的后端和前端，所述五通4位于车架1中部下端，所述后叉叉脚2和前叉叉脚3均设置有内轴承位，使得后轮承载轴承6和前轮轴承5分别对应装配在各自的内轴承位里，所述前叉叉脚3和前轮轴承5通过前轮花鼓固定销11穿接固定，所述前轮花鼓固定销11上套装有前轮花鼓8，所述前轮花鼓8内无需设置对应的轴承，所述后叉叉脚2和后轮承载轴承6通过后轮花鼓固定销12穿接固定，所述后轮花鼓固定销12上套装有后轮花鼓9，所述后轮花鼓9内无需设置对应的轴承，所述五通4的横直通管两端均设置有外轴承位，所述外轴承位上均套装有曲柄轴承7，所述曲柄轴承7外侧套装有曲柄10，所述曲柄10的主轴贯穿五通4的横直通管设置，并将两个曲柄10固定连接。
所述前轮花鼓固定销11和后轮花鼓固定销12均由设置有螺纹端的销轴和能与销轴的螺纹端匹配的螺帽组成。
下面结合具体实施例对本发明进行详细的阐述。
如图2～图4，前叉叉脚3拥有内轴承位3a，前轮轴承5的外圈5a分别安装在前叉叉脚的内轴承位3a内，前轮花鼓8的两个端面8a分别与前轮轴承5的内圈5b的内侧端面 接触。前轮花鼓固定销11有一个螺纹端11a与螺纹盖11b内的内螺纹11c相适配，前轮花鼓固定销11的螺纹端11a穿过前轮花鼓8和前轮轴承5后与螺纹盖11b通过内螺纹11c旋紧，直至前轮花鼓固定销11和螺纹盖11b的端面11d分别与前轮轴承5的内圈5b的外侧端面接触后锁紧而固定，当安装完成后前轮便可以围绕前轮轴心线旋转。
如图5～图7，后叉叉脚2拥有内轴承位2a，后轮承载轴承6的外圈6a分别安装在后叉叉脚的内轴承位2a内，后轮花鼓9的两个端面9a分别与后轮承载轴承6的内圈6b的内侧端面接触。后轮花鼓固定销12有一个螺纹端12a与螺纹盖12b内的内螺纹12c相适配，后轮花鼓固定销12的螺纹端12a穿过后轮花鼓9和后轮承载轴承6后与螺纹盖12b通过内螺纹12c旋紧，直至后轮花鼓固定销12和螺纹盖12b的端面12d分别与后轮承载轴承6的内圈6b的外侧端面接触后锁紧而固定，当安装完成后后轮便可以围绕后轮轴心线旋转。
如图8、图9，车架五通4拥有外轴承位4a，曲柄10拥有内轴承位10a。曲柄轴承7的内圈7b安装在五通外轴承位4a上，曲柄轴承7的外圈7a安装在曲柄内轴承位10a内。曲柄10的主轴10b穿过五通完成安装后，曲柄就可以围绕曲柄轴心旋转。
相对于普通结构的自行车之中，前轮轴承和后轮承载轴承分别安装于前轮花鼓和后轮花鼓内，同时也分别安装与前轮主轴和后轮主轴之上，而在本发明中的自行车车架与前叉之中，前轮轴承的间距与后轮承载轴承的间距均远远宽于普通结构自行车中的前轮轴承的间距与后轮承载轴承的间距，自行车架和前叉结构提升了前后轮的刚性，提升了轴承的耐用性，并且本发明中的前后轮的花鼓内部不需要轴心，结构也更简单，因此本发明中的前后轮的花鼓的制造成本也更低。
现对于普通自行车之中，曲柄轴承安装在五通之内，同时安装在曲柄主轴之上，显而易见的是，普通自行车之中的曲柄轴承的间距比较窄，并且轴承的尺寸受到车架五通的限制而无法进一步扩大，曲柄轴心的尺寸也受到轴承限制而无法进一步扩大。从而降低了曲柄的整体抗弯曲性能和抗扭性能。而本发明中的自行车的曲柄轴承安装与五通外侧，并且安装在曲柄轴承位之内，显而易见的是，本发明中的曲柄轴承的间距更宽，并且轴承的尺 寸不受五通的限制从而可以进一步扩大，并且曲柄轴心的尺寸也不受轴承的限制从而可以进一步扩大，进而提升了曲柄的抗弯曲性能和抗扭性能。
上面结合附图对本发明的实施例作了详细说明，但是本发明并不限于上述实施例，在本领域普通技术人员所具备的知识范围内，还可以在不脱离本发明宗旨的前提下作出各种变化。

Claims (1)

  1. 一种改进型自行车车架结构，包括车架(1)、后叉叉脚(2)、前叉叉脚(3)和五通(4)，所述后叉叉脚(2)和前叉叉脚(3)分别固定设置在车架(1)的后端和前端，所述五通(4)位于车架(1)中部下端，其特征在于，所述后叉叉脚(2)和前叉叉脚(3)均设置有内轴承位，使得后轮承载轴承(6)和前轮轴承(5)分别对应装配在各自的内轴承位里，所述前叉叉脚(3)和前轮轴承(5)通过前轮花鼓固定销(11)穿接固定，所述前轮花鼓固定销(11)上套装有前轮花鼓(8)，所述前轮花鼓(8)内无需设置对应的轴承，所述后叉叉脚(2)和后轮承载轴承(6)通过后轮花鼓固定销(12)穿接固定，所述后轮花鼓固定销(12)上套装有后轮花鼓(9)，所述后轮花鼓(9)内无需设置对应的轴承，所述五通(4)的横直通管两端均设置有外轴承位，所述外轴承位上均套装有曲柄轴承(7)，所述曲柄轴承(7)外侧套装有曲柄(10)，所述曲柄(10)的主轴贯穿五通(4)的横直通管设置，并将两个曲柄(10)固定连接。2.根据权利要求1所述的一种改进型自行车车架结构，其特征在于，所述前轮花鼓固定销(11)和后轮花鼓固定销(12)均由设置有螺纹端的销轴和能与销轴的螺纹端匹配的螺帽组成。
PCT/CN2019/101702 2018-08-21 2019-08-21 一种改进型自行车车架结构 WO2020038385A1 (zh)

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