IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0969790
(2010-12-16)
|
등록번호 |
US-8739949
(2014-06-03)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
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인용정보 |
피인용 횟수 :
0 인용 특허 :
4 |
초록
▼
A brake master cylinder of the invention is to dispose a main oil cylinder and an oil storing space on a handlebar base. In addition, a sleeve engaged with the main oil cylinder is disposed in the oil storing space. The one end of the oil storing space has a fastening seat passed by a draw bar linke
A brake master cylinder of the invention is to dispose a main oil cylinder and an oil storing space on a handlebar base. In addition, a sleeve engaged with the main oil cylinder is disposed in the oil storing space. The one end of the oil storing space has a fastening seat passed by a draw bar linked to the brake handlebar, and a positioning sheath of the fastening seat is utilized to engage with the sleeve. A leakage prevention component is disposed between the fastening seat and the handlebar base. A bushing integrally extended from the leakage prevention component is utilized to encapsulate the positioning sheath of the fastening seat and the sleeve. Accordingly, the brake master cylinder having convenient assembly and better sealing effect for hydraulic oil is obtained.
대표청구항
▼
1. A brake master cylinder, comprising a main oil cylinder and an oil storing space integrally disposed on a handlebar base of a brake handlebar, the oil storing space having an axial position with respect to the main oil cylinder of the handlebar base, one end of the handlebar base having an oil ou
1. A brake master cylinder, comprising a main oil cylinder and an oil storing space integrally disposed on a handlebar base of a brake handlebar, the oil storing space having an axial position with respect to the main oil cylinder of the handlebar base, one end of the handlebar base having an oil outlet, which connects to the main oil cylinder via a hydraulic pipe, one end of the handlebar base having an installation hole corresponding to the oil storing space, a piston, which is driven by the brake handlebar, located inside the main oil cylinder, the brake master cylinder being characterized in that: a sleeve engaged with the main oil cylinder, located inside the handlebar base, one end of the piston, which relatively stretches into the main oil cylinder, having a first rubber ring, one end of the piston, which relatively stretches into the sleeve, having a second rubber ring;a fastening seat located in the installation hole of the handlebar base, the fastening seat having a positioning sheath that stretches into the handlebar base and has an extension portion protruding inwardly towards the oil outlet to engage with the sleeve to cooperatively define the main oil cylinder, a draw bar passing through a central place of the positioning sheath to link the piston and the brake handlebar; anda leakage prevention component for preventing oil leakage from the main oil cylinder, the leakage prevention component being located between the fastening seat and the handlebar base, a rigid bushing extending from the leakage prevention component to surround the extension portion of the positioning sheath and the sleeve and an inner flange that is disposed to an end of the bushing and engages with the sleeve through a circular groove in the sleeve, so that the bushing and the handlebar base cooperatively define the oil storing space having a fixed volume and the bushing encapsulates the engaged portions of the positioning sheath and the sleeve. 2. The brake master cylinder as recited in claim 1, wherein the bushing for encapsulating the positioning sheath of the fastening seat and the sleeve is integrally extended from the leakage prevention component, and an inner flange is engaged with a tail of the bushing, and a circular groove for fastening the inner flange is located on a periphery of the sleeve. 3. The brake master cylinder as recited in claim 1, wherein the bushing for encapsulating the positioning sheath of the fastening seat and the sleeve is integrally extended from the leakage prevention component, and a tail of the bushing has an inner flange, and a periphery of the sleeve has a circular groove that engages with the inner flange, and a stage for plugging the sleeve and the bushing is formed at an engaging place between the main oil cylinder and the oil storing space of the handlebar base. 4. The brake master cylinder as recited in claim 1, wherein an external flange clamped between the installation hole and the fastening seat is in front of the leakage prevention component. 5. The brake master cylinder as recited in claim 1, wherein at least one first oil-return hole connected to the oil storing space is located at a reciprocation place for the first rubber ring in the main oil cylinder of the handlebar base. 6. The brake master cylinder as recited in claim 1, wherein at least one oil-return hole connected to the oil storing space is located on the sleeve. 7. The brake master cylinder as recited in claim 1, wherein the handlebar base has at least one first oil-return hole, which is connected to the oil storing space, located at a reciprocation place for the first rubber ring in the main oil cylinder, and at least one second oil-return hole connected to the oil storing space is located on the sleeve. 8. The brake master cylinder as recited in claim 1, wherein a spring is located at a place between the main oil cylinder and the piston of the handlebar base. 9. The brake master cylinder as recited in claim 1, wherein the handlebar base has at least one first oil-return hole, which is connected to the oil storing space, located at a reciprocation place for the first rubber ring in the main oil cylinder, and a spring is located at the place between the main oil cylinder and the piston of the handlebar base. 10. The brake master cylinder as recited in claim 1, wherein an oil-return hole connected to the oil storing space is disposed on the sleeve, and a spring is disposed to the place between the main oil cylinder and the piston of the handlebar base. 11. The brake master cylinder as recited in claim 1, wherein the handlebar base has at least one first oil-return hole, which is connected to the oil storing space, disposed to a reciprocation place for the first rubber ring in the main oil cylinder, and a spring is located at the place between the main oil cylinder and the piston of the handlebar base. 12. The brake master cylinder as recited in claim 1, wherein the first rubber ring is a bowl shape. 13. The brake master cylinder as recited in claim 1, wherein the first rubber ring is a circular rubber ring, and the handlebar base has an oil-return section, in which an inner diameter is relatively larger than an external diameter of the first rubber ring, formed at one first oil-return hole of the main oil cylinder. 14. The brake master cylinder as recited in claim 1, wherein the second rubber ring is a circular cycle. 15. The brake master cylinder as recited in claim 1, wherein the piston is provided with a necking section between the first rubber ring and the second rubber ring. 16. The brake master cylinder as recited in claim 1, wherein the draw bar is pivotally connected to the brake handlebar through a rotary shaft. 17. The brake master cylinder as recited in claim 1, wherein the draw bar is pivotally connected to the brake handlebar through a rotary shaft, and a thread section is disposed to a bar body of the draw bar, and the rotary shaft has a thread hole threaded to the thread section of the draw bar. 18. The brake master cylinder as recited in claim 1, wherein one end of the piston has a ball seat that is toward the fastening seat, and the draw bar has a ball end fit to the ball seat, and the draw bar is pivotally connected to the brake handlebar through a rotary shaft. 19. The brake master cylinder as recited in claim 1, wherein one end of the piston has a ball seat that is toward the fastening seat, and the draw bar has a ball end fit to the ball seat, and the draw bar is pivotally connected to the brake handlebar through a rotary shaft, and the rotary shaft has a thread hole threaded to a thread section of the draw bar. 20. The brake master cylinder as recited in claim 1, wherein a rod body that is toward the brake handlebar is extended from one end of the piston, and the rod body replaces the draw bar, and the brake handlebar has a ball end that is in contact with the rod body, and when the brake handlebar swings, the ball end is utilized to push the rod body to perform a reciprocation motion together with a spring to achieve the foregoing motion.
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