CN204127231U - For the screw mandrel of electronic brake system - Google Patents
For the screw mandrel of electronic brake system Download PDFInfo
- Publication number
- CN204127231U CN204127231U CN201420282792.1U CN201420282792U CN204127231U CN 204127231 U CN204127231 U CN 204127231U CN 201420282792 U CN201420282792 U CN 201420282792U CN 204127231 U CN204127231 U CN 204127231U
- Authority
- CN
- China
- Prior art keywords
- boss
- flange
- screw mandrel
- groove
- nut
- 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.)
- Withdrawn - After Issue
Links
Abstract
The utility model relates to a kind of screw mandrel for electronic brake system and processing molding method thereof.The body of rod comprises threaded end and splined end, be provided with a flange between the two, flange is provided with a boss for mating with nut restraining groove towards the plane of threaded end side, it is characterized in that described flange is provided with a position and the size groove corresponding with boss towards the plane of splined end.The screw mandrel that this programme provides is by extruding boss again after ball Slot shaping, and solving lug boss position cannot the difficult problem of precise positioning, rotates by nut the position that dead-centre position determines boss.
Description
Technical field
The utility model relates to a kind of screw mandrel for electronic brake system.
Background technique
Along with popularizing of automobile, motor corporation pays close attention to the travelling comfort and Security that improve client's driving more, and current electronic brake (EPB) system is widely used on automobile.The convert rotational motion of motor is the straight line motion of nut by belt, planetary pinion, screw mandrel by electronic brake system, then the piston promoting wheel cylinder by nut realizes parking braking.During release parking braking, motor counterrotating, nut retreats, wheelcylinder piston return.
Screw rod transmission achieves between rotary motion and straight line motion and mutually changes, and has auto-lock function.
Screw thread and spline are contained in screw mandrel both sides, and threaded end contains the ball groove rotated with nut screw connection; Splined end contains a draw-in groove, and draw-in groove upper end is spline, and lower end is one section of cylinder.
The centre of screw mandrel, has a flange as shown in Figure 1, a side plane of flange is designed with a boss, and when nut rotation just overlaps to nut section start restraining groove with boss, screw mandrel is locked, and automobile realizes parking braking; When nut counterrotating, nut section start restraining groove is separated with boss, and automobile realizes release braking.Therefore due to the section start of screw thread and the status requirement of boss, the processing of boss is more difficult.
In prior art, boss has following several moulding process:
The first, boss is by Milling Process boss, and the way of this kind of processing boss not only wastes time and energy, waste material, and manufacturing efficiency is low, does not meet modern efficient, saves time, the production theory of environmental protection.
The second, boss is by cold-heading molding, and this kind of boss forming method moves radial velocity due to punch die flow of material when extruding and be greater than axial velocity, so material is when flange outer diameter reaches, boss forming height does not also reach; And whole end face of flange only has while there is flange, so there is flange side material should Radial Flow axial flow again, cause material radial flow velocity and other positions inconsistent, thus cause flange outer diameter irregular, external diameter needs just can reach claimed range through turning; And ball groove does not also have roll forming during screw mandrel cold-heading molding, nut initial position cannot be determined, and then causes lug boss position precisely to determine.So this kind of moulding process not only processing technology is complicated, waste material, and lug boss position cannot precise positioning, and then cause cannot be with the use of with nut.
Summary of the invention
The purpose of this utility model is to provide a kind of screw mandrel for electronic brake system.
The utility model devises a groove at the another side that boss is corresponding, makes the processing of boss become easy.By the groove of punching press flange side during boss forming, material is flow to needs this side of boss, and by mould restriction boss size, can accomplish the accurate location of boss.
For the screw mandrel of electronic brake system, the body of rod comprises threaded end and splined end, be provided with a flange between the two, flange is provided with a boss for mating with nut restraining groove towards the plane of threaded end side, it is characterized in that described flange is provided with a position, the shape and size groove corresponding with boss towards the plane of splined end.So-called corresponding, as shown in Figure 3, refer to the position of groove in splined end Flange Plane identical with the position of boss in threaded end Flange Plane; The pit shape that shape and size correspondence refers to groove is consistent with the shape and size of boss with size.
The processing molding method of described screw mandrel comprises the following steps:
A, screw mandrel shape molding, utilize multistage cold former to squeeze out to comprise the screw mandrel blank of flange;
B, ball Slot shaping, utilize gear hobbing machine that the threaded end ball trough roller of screw mandrel blank is pressed out;
C, boss forming, first on threaded end one side plane, be fixedly installed one at flange and comprise the die that boss profile presets groove, then press machine is utilized to extrude the opposite side plane of flange towards splined end, and utilize the default groove place of the drift Extruding die of press machine, make the metallic material of flange flow to default groove place and form boss.
Further, the processing molding method of described screw mandrel comprises following steps composition:
A, metal wire rod are annealed, drawing and lubrication, make it applicable cold-heading molding;
B, cold-heading molding, utilize multistage cold former to squeeze out to comprise the screw mandrel blank of flange;
C, Vehicle Processing, utilize the draw-in groove of lathe in machining screw mandrel;
D, roll extrusion ball groove, with the ball groove of thread rolling machine or thread-rolling machine roll extrusion spiral end;
E, boss forming, first on threaded end one side plane, be fixedly installed one at flange and comprise the die that boss profile presets groove, then press machine is utilized to extrude the opposite side plane of flange towards splined end, and utilize the default groove place of the drift Extruding die of press machine, make the metallic material of flange flow to default groove place and form boss;
F, heat treatment.
The screw mandrel that this programme provides is by extruding boss again after ball Slot shaping, avoiding lug boss position cannot the difficult problem of precise positioning, the position that dead-centre position determines boss can be rotated by nut, then by punching press flange side, material is flow to needs this side of boss, and limits boss size with mould.
Accompanying drawing explanation
Fig. 1 is the left TV structure schematic diagram of the utility model screw mandrel.
Fig. 2 is the main TV structure schematic diagram of the utility model screw mandrel.
Fig. 3 is the right TV structure schematic diagram of the utility model screw mandrel.
Fig. 4 is the left TV structure schematic diagram of other screw mandrels.
Fig. 5 is the main TV structure schematic diagram of other screw mandrels.
Fig. 6 is the right TV structure schematic diagram of other screw mandrels.
Fig. 7 is the utility model boss extrusion process position view.
Figure number illustrates:
1, boss
2, ball groove
3, flange
4, draw-in groove
5, spline
6, groove
7, drift
8, workpiece
9, die
10, groove is preset.
Embodiment
Below in conjunction with accompanying drawing, the utility model is conducted further description:
As shown in Figure 1, screw mandrel comprises threaded end and splined end, and is provided with a flange 3 in the middle of them, flange 3 is provided with a boss 1 towards the plane of threaded end side, and flange 3 is provided with a position and the size groove 6 corresponding with boss towards the plane of splined end.Screw thread and spline are contained in screw mandrel both sides, and threaded end contains the ball groove 2 rotated with nut screw connection; Splined end contains a draw-in groove 4, and draw-in groove upper end is spline 5, and lower end is one section of cylinder.As shown in Figure 7, by the workpiece 8 formed after cold-heading molding, Vehicle Processing draw-in groove, roll extrusion ball groove, roll extrusion spline, boss 1 adopts by drift 7 punching press flange 3 splined end side, the metallic material of flange 3 is flow to and needs threaded end, namely flowing is full of the default groove 10 of die 9, and the shape of this default groove 10 is consistent with boss 1.Die 9 is that the position giving directions position to carry out default groove 10 according to the rotation of nut is determined.
The boss of this programme screw mandrel carries out after the operations such as cold-heading molding, Vehicle Processing draw-in groove, roll extrusion ball groove, roll extrusion spline, after extruding boss, heat-treats.Because boss size is ensured by die 9, lug boss position so both can be avoided to misplace, boss size can have been ensured again; Manufacturing efficiency is higher, and other processing mode not only machining to take time length, it is reliable that boss size does not have mould to ensure to come yet, and lug boss position error is uncontrollable.
Claims (1)
1. for the screw mandrel of electronic brake system, the body of rod comprises threaded end and splined end, be provided with a flange between the two, flange is provided with a boss for mating with nut restraining groove towards the plane of threaded end side, it is characterized in that described flange is provided with a position and the size groove corresponding with boss towards the plane of splined end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420282792.1U CN204127231U (en) | 2014-05-28 | 2014-05-28 | For the screw mandrel of electronic brake system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420282792.1U CN204127231U (en) | 2014-05-28 | 2014-05-28 | For the screw mandrel of electronic brake system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204127231U true CN204127231U (en) | 2015-01-28 |
Family
ID=52383590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420282792.1U Withdrawn - After Issue CN204127231U (en) | 2014-05-28 | 2014-05-28 | For the screw mandrel of electronic brake system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204127231U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104088976A (en) * | 2014-05-28 | 2014-10-08 | 杭州新坐标科技股份有限公司 | Screw rod for electronic parking brake system and processing molding method thereof |
-
2014
- 2014-05-28 CN CN201420282792.1U patent/CN204127231U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104088976A (en) * | 2014-05-28 | 2014-10-08 | 杭州新坐标科技股份有限公司 | Screw rod for electronic parking brake system and processing molding method thereof |
| CN104088976B (en) * | 2014-05-28 | 2016-08-17 | 杭州新坐标科技股份有限公司 | Screw mandrel and processing molding method thereof for electronic brake system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150128 Effective date of abandoning: 20160817 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |