CN201301914Y - Eccentric camshaft for electric vehicle servo brake - Google Patents
Eccentric camshaft for electric vehicle servo brake Download PDFInfo
- Publication number
- CN201301914Y CN201301914Y CNU2008202178013U CN200820217801U CN201301914Y CN 201301914 Y CN201301914 Y CN 201301914Y CN U2008202178013 U CNU2008202178013 U CN U2008202178013U CN 200820217801 U CN200820217801 U CN 200820217801U CN 201301914 Y CN201301914 Y CN 201301914Y
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- CN
- China
- Prior art keywords
- square block
- eccentric cam
- cam shaft
- electric motor
- motor car
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
An eccentric camshaft for electric vehicle servo brake relates to the technical field of eccentric camshaft mounted on electric vehicle servo brake, wherein the bottom of the screw cylinder shaft (5) at the upper end of the eccentric camshaft (1) is vertically connected with the upper plane of a square block (4); the bottom of the square block (4) is vertically connected with the upper circle end face of a central cylinder (3); the bottom of the central cylinder (3) is vertically connected with the upper plane of a cam (2); the vertical medial axis of the screw cylinder shaft (5), the square block (4) and the central cylinder (3) are laminated; the side length of the square block (4) is not shorter than 7mm; and the diameter of the central cylinder shaft (3) is not shorter than 7mm. The eccentric camshaft for electric vehicle servo brake has the advantages of reliable brake and safe operation.
Description
Technical field:
A kind of electric motor car servant brake of the utility model relates to the eccentric cam shaft field that is installed on the electric motor car servant brake with eccentric cam shaft.
Background technique:
Eccentric cam shaft generally all is installed on the electric motor car servant brake, when the cyclist spurs the brake of electric motor car handgrip, the line of stopping pulling crank throw rotates, because the square hole of crank throw one end is sleeved on the square block of eccentric cam shaft, after crank throw is rotated, then drive the rotation of the square block on the eccentric cam shaft, thereby whole eccentric cam shaft is rotated in the lining of electric motor car servant brake, then the cam braking surface on the cam of eccentric cam shaft promotes the contact pin on the shoe plate, shoe plate is opened, then the interior brake disc inwall of the friction material in the shoe plate outside and servant brake rubs mutually, because brake disc and electric motor car rotatingshaft just connect together, after so brake disc is braked then the electric motor car rotatingshaft stop operating, realize brake.Bigger electric motor car then will use the servant brake than the major diameter brake disc to power, be that braking force will increase, and the square block area on the eccentric cam shaft on the general electric motor car servant brake is 7 millimeters * 7 millimeters, the square block of obviously so little sectional area is when if to be used for diameter be 90 millimeters to 130 millimeters servant brake brake disc, easily make general in the past eccentric cam shaft distortion after the braking force reaction of its brake, even it is fractureed, last eccentric cam shaft can't promote shoe plate and open and brake, cause the security incident of electric motor car operation, servant brake in the electric motor car that adapts to big power then should strengthen design to eccentric cam shaft.
Summary of the invention:
The purpose of this utility model provides a kind of electric motor car servant brake eccentric cam shaft, by the sectional area of the square block on the increase eccentric cam shaft and the diameter of central cylinder, strengthen the intensity of electric motor car servant brake to reach, the purpose of safety traffic thereby the realization electric motor car reliably brakes with eccentric cam shaft.
A kind of electric motor car servant brake eccentric cam shaft, eccentric cam shaft is made into integral piece by cam, central cylinder, square block and threaded circular axis of a cylinder, the plane is vertical on the threaded circular axis of a cylinder bottom of eccentric cam shaft upper end and the square block is connected, the nose circle face is vertical on square block bottom and the central cylinder is connected, vertical being connected of last plane of the bottom of central cylinder and cam, threaded circular axis of a cylinder, square block and central cylinder three's vertical centering control axis is in same vertical centering control axis; The square cross section length of side of square block is not less than 7 millimeters, and the diameter of central cylinder is not less than 7 millimeters.
A kind of electric motor car servant brake of the utility model is made into integral piece with eccentric cam shaft by cam, central cylinder, square block and threaded circular axis of a cylinder, the last plane of cam and the lower plane of cam are parallel to each other, between plane on the cam and lower plane, constitute the cam bit of cam, because center of gravity vertical axis Off center cylindrical body, square block and the screw thread circular shaft three's of cam bit common vertical axis is so camshaft is an eccentric cam shaft.
The cam braking surface that arc is arranged with cam one end of eccentric cam shaft at a kind of electric motor car servant brake of the utility model, be the working surface of cam, after eccentric cam shaft rotates under crank throw drives, then the contact pin of shoe plate is opened shoe plate on the cam braking surface promotion servant brake, then shoe plate outside friction plate rubs mutually with the brake disc inwall, the electric motor car rotatingshaft is braked, realized brake.
With the perpendicular central cylinder that is connected in plane on the cam, place in the lining of electric motor car servant brake, the nose circle face is connected with the square block bottom vertical on the central cylinder, and is connected to the cylindrical of nose circle face on the central cylinder in four jiaos of square block bottom.
The plane is connected with threaded circular axis of a cylinder bottom vertical on the square block of eccentric cam shaft, and square block is rounded down for four jiaos, and square block is installed in the square block mounting hole of crank throw one end of electric motor car servant brake, is connected with crank throw.
With the vertical threaded circular axis of a cylinder that is connected in plane on the square block on the eccentric cam shaft is to be used for installing the nut that is pressed in crank throw top to use, so that the square block mounting hole of crank throw is sleeved on the square block of eccentric cam shaft.On the threaded circular axis of a cylinder, outside thread is arranged.
A kind of electric motor car servant brake of the utility model is the servant brake that can be used for the big electric motor car of power with the eccentric cam shaft advantage, can guarantee that electric vehicle brake is reliable, security of operation.
Description of drawings:
Fig. 1: be electric motor car servant brake eccentric cam shaft 1 schematic three dimensional views.
Fig. 2: for the electric motor car servant brake is looked schematic representation with eccentric cam shaft 1 master.
Fig. 3: for the electric motor car servant brake is looked schematic representation with eccentric cam shaft 1 left side.
Fig. 4: be electric motor car servant brake eccentric cam shaft 1 schematic top plan view.
Embodiment:
Referring to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, a kind of electric motor car servant brake is made into integral piece with eccentric cam shaft 1 by cam 2, central cylinder 3, square block 4 and threaded circular axis of a cylinder 5, the plane is vertical on the threaded circular axis of a cylinder 5 of eccentric cam shaft 1 upper end and the square block 4 of bottom is connected, the nose circle face is vertical on square block 4 bottoms and the central cylinder 3 is connected, vertical being connected of last plane of the bottom surface of central cylinder 3 and cam 2, threaded circular axis of a cylinder 5, square block 4 and central cylinder 3 threes' vertical centering control axis is same vertical center line.
Threaded circular axis of a cylinder 5 is for there being externally threaded cylindrical shaft, and its diameter, is added a cover on crank throw so that nut is installed less than the cross section length of side of square block 4.
The diameter of central cylinder 3 is not less than 7 millimeters, generally between 7 millimeters to 16 millimeters.
The last plane of cam 2 and lower plane are the parallel surface that is parallel to each other, and an end of cam 2 has the cam braking surface 6 of arc, and cam braking surface 6 makes the open cam working face of shoe plate for the contact pin that promotes on the hoof piece.
Claims (5)
1, a kind of electric motor car servant brake eccentric cam shaft, eccentric cam shaft (1) is by cam (2), central cylinder (3), square block (4) and threaded circular axis of a cylinder (5) are made into integral piece, the plane is vertical on threaded circular axis of a cylinder (5) bottom that it is characterized in that eccentric cam shaft (1) upper end and the square block (4) is connected, the nose circle face is vertical on square block (4) bottom and the central cylinder (3) is connected, vertical being connected of last plane of the bottom of central cylinder (3) and cam (2), threaded circular axis of a cylinder (5), square block (4) and central cylinder (3) three's vertical centering control axis is in same vertical centering control axis; The square cross section length of side of square block (4) is not less than 7 millimeters, and the diameter of central cylinder (3) is not less than 7 millimeters.
2, a kind of electric motor car servant brake eccentric cam shaft according to claim 1 is characterized in that threaded circular axis of a cylinder (5) for externally threaded cylindrical shaft is arranged, and its diameter is less than the cross section length of side of square block (4).
3, a kind of electric motor car servant brake eccentric cam shaft according to claim 1 is characterized in that square block (4) is the flat square piece, and square block is rounded down for (4) four jiaos, and the square cross section length of side of square block (4) is between 7 millimeters to 16 millimeters.
4, a kind of electric motor car servant brake eccentric cam shaft according to claim 1, the diameter that it is characterized in that central cylinder (3) is between 7 millimeters to 16 millimeters.
5, a kind of electric motor car servant brake eccentric cam shaft according to claim 1 is characterized in that the last plane of cam (2) and lower plane are the parallel surface that is parallel to each other, and the cam braking surface (6) of arc is arranged at an end of cam (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202178013U CN201301914Y (en) | 2008-11-11 | 2008-11-11 | Eccentric camshaft for electric vehicle servo brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202178013U CN201301914Y (en) | 2008-11-11 | 2008-11-11 | Eccentric camshaft for electric vehicle servo brake |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201301914Y true CN201301914Y (en) | 2009-09-02 |
Family
ID=41085540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202178013U Expired - Fee Related CN201301914Y (en) | 2008-11-11 | 2008-11-11 | Eccentric camshaft for electric vehicle servo brake |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201301914Y (en) |
-
2008
- 2008-11-11 CN CNU2008202178013U patent/CN201301914Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090902 Termination date: 20121111 |