CN204493528U - Parking stroke adjustment screw rod - Google Patents
Parking stroke adjustment screw rod Download PDFInfo
- Publication number
- CN204493528U CN204493528U CN201520122096.9U CN201520122096U CN204493528U CN 204493528 U CN204493528 U CN 204493528U CN 201520122096 U CN201520122096 U CN 201520122096U CN 204493528 U CN204493528 U CN 204493528U
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- screw rod
- ball dish
- parking
- stroke adjustment
- utility
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Abstract
The utility model discloses a kind of parking stroke adjustment screw rod, and it is arranged in the housing cylinder of parking brake caliper, its overall structure be made up of the ball dish at screw rod and top; The outer rim equal portions of described ball dish are furnished with the guide ledges of an arc anti-rotation, and described ball dish top surface evenly offers a slope raceway.Described boss and the supporting setting of slope raceway.The utility model improves the quality of fit of part, centering and guidance quality good; The transmission efficiency that the utility model improves; The utility model decreases number of spare parts, reduces difficulty of processing and cost.
Description
Technical field
The utility model relates to parking brake caliper field, is specifically related to a kind of parking stroke adjustment screw rod.
Background technique
In the disc type braking tong of band parking braking known at present, generally adopt stroke adjustment screw rod and adjusting nut mating reaction to carry out passing shaft to steering force, and revolve the wearing and tearing of stretching and compensating braking plate friction material by screw thread.In the conductive process of axial braking force, masterpiece be used in match screw rod, swivel nut thread helix face on, screw rod or swivel nut can be made to produce convolution, exert all one's strength lax.For ensureing unlikely absent-mindedness in the conductive process of power, a rotation-preventing mechanism must be increased, preventing screw rod or swivel nut from rotating, only allowing to move axially.
Application number be 2012205295617 Chinese utility model patent disclose a kind of brake calipers with parking and braking mechanism, the parking braking torque arm that it comprises brake calipers cylinder body, piston and is arranged on parking and braking mechanism in brake calipers cylinder body, is connected with parking and braking mechanism; Parking and braking mechanism comprises parking axle, anti-rotation lining, parking swivel nut and parking screw rod.This parking swivel nut comprises top ball dish; Ball dish outer rim is uniform-distribution with multiple square guide ledges, and this structural design exists following defect:
1) because ball dish outer rim is uniform-distribution with multiple square guide ledges, so stroke adjustment swivel nut can not directly coordinate with the arc groove on housing cylinder holes wall, also need between them to be provided with auxiliary fixed sleeve part, auxiliary swivel nut inwall offer square guide groove and square boss supporting, outer wall is curved and coordinate with the arc groove on housing cylinder holes wall.Set up auxiliary fixed sleeve part and directly increase product and manufacturing process cost.
2) problem of assisting the manufacturing tolerances of fixed sleeve part and assembly precision directly to affect or cause axis to misalign, will reduce the working efficiency of brake calipers;
3) on swivel nut top ball dish, ball groove standard pitch diameter is limited to the impact of tapped bore, is unfavorable for realizing the parking brake caliper of little cylinder diameter or reduces standard pitch diameter to increase the design needs of the parking brake caliper of lever ratio;
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of parking stroke adjustment screw rod, solves the problems such as the low and axis of existing stroke adjustment screw rod transmission efficiency misaligns.
For achieving the above object, a kind of parking stroke adjustment screw rod designed by the utility model, it is arranged in the housing cylinder of parking brake caliper, its overall structure be made up of the ball dish at screw rod and top; The outer rim equal portions of described ball dish are furnished with the guide ledges of multiple arc anti-rotation, and described ball dish top surface evenly offers multiple slopes raceway, and described guide ledges and slope raceway are in same radius.
Further, described screw rod comprises the cylinder near ball dish and the screw head with bull buttress thread form, is connected with tool withdrawal groove between described cylinder and screw head, and the diameter of tool withdrawal groove is less than cylinder and screw head.
Again further, described guide ledges is arranged in the anti-rotation groove in inner walls.
Again further, described guide ledges top is parallel with ball dish top surface; And bottom is higher than ball tray bottom.
Again further, the quantity of described guide ledges and slope raceway is equal 3.
The beneficial effects of the utility model:
1, the utility model improves the quality of fit of part, centering and guidance quality good;
2, the transmission efficiency that improves of the utility model;
3, the utility model decreases number of spare parts, reduces difficulty of processing and cost.
4, when parking braking, parking tensile force impels drive shaft turns by tie rod arm, drives the steel ball between two ball dishes to move in the raceway of corresponding slope, produces end thrust, promotes stroke adjustment screw axial and moves.Stroke adjustment screw rod ball dish portion outer rim arcuate guide boss slides axially on the groove of inner walls, effectively prevents the rotation of stroke adjustment screw rod.The bar portion screw thread of stroke adjustment screw rod is connected with the stroke adjustment swivel nut in piston, can promote piston and move vertically;
Accompanying drawing explanation
Fig. 1 is the structural representation that the utility model is arranged on the housing cylinder of parking brake caliper;
Fig. 2 is the detailed drawing that the utility model is arranged on the housing cylinder of parking brake caliper;
Fig. 3 is parking stroke adjustment screw-rod structure schematic diagram of the present utility model;
In figure, screw rod 1, cylinder 1.1, tool withdrawal groove 1.2, screw head 1.3, ball dish 2, guide ledges 3, slope raceway 4, housing cylinder 5, anti-rotation groove 5.1, live axle 6.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail, so that those skilled in the art understand.
The screw rod of parking stroke adjustment as shown in the figure, it is arranged in the housing cylinder 5 of parking brake caliper, its overall structure be made up of the ball dish 2 at screw rod 1 and top; The outer rim equal portions of ball dish 2 are furnished with the guide ledges 3 of 3 arc anti-rotations, and ball dish 2 top surface evenly offers 3 slope raceways 4.Guide ledges 3 and the supporting setting of slope raceway 4, described guide ledges 3 and slope raceway 4 are in same radius;
Screw rod 1 comprises the cylinder 1.1 near ball dish 2 and the screw head 1.3 with bull buttress thread form, is connected with tool withdrawal groove 1.2 between cylinder 1.1 and screw head 1.3, and the diameter of tool withdrawal groove 1.2 is less than cylinder 1.1 and screw head 1.3.
On the inwall that guide ledges 3 is arranged on housing 5 in anti-rotation groove 5.1.Guide ledges 3 top is parallel with ball dish 2 top surface; And bottom is higher than bottom ball dish 2.
During real work, stroke adjustment screw rod and live axle 6 routing motion in the housing cylinder 5 of parking brake caliper.
Other unspecified part is prior art.Although above-described embodiment has made detailed description to the utility model; but it is only the utility model part embodiment; instead of whole embodiment; people can also obtain other embodiments according to the present embodiment under without creative prerequisite, and these embodiments belong to the utility model protection domain.
Claims (5)
1. a parking stroke adjustment screw rod, is characterized in that: it is arranged in the housing cylinder (5) of parking brake caliper, its overall structure be made up of the ball dish (2) at screw rod (1) and top; The outer rim of described ball dish (2) is evenly arranged the guide ledges (3) of multiple arc anti-rotation, described ball dish (2) top surface evenly offers multiple slopes raceway (4), and described guide ledges (3) and slope raceway (4) are in same radius.
2. the screw rod of parking stroke adjustment according to claim 1, it is characterized in that: described screw rod (1) comprises near the cylinder (1.1) of ball dish (2) and with the screw head (1.3) of bull buttress thread form, is connected with tool withdrawal groove (1.2) between described cylinder (1.1) and screw head (1.3), and the diameter of tool withdrawal groove (1.2) is less than cylinder (1.1) and screw head (1.3).
3. parking stroke adjustment screw rod according to claim 1 or 2, is characterized in that: described guide ledges (3) is arranged in the anti-rotation groove (5.1) on housing (5) inwall.
4. parking stroke adjustment screw rod according to claim 1 or 2, is characterized in that: described guide ledges (3) top is parallel with ball dish (2) top surface; And bottom is higher than ball dish (2) bottom.
5. the screw rod of parking stroke adjustment according to claim 3, is characterized in that: the quantity of described guide ledges (3) and slope raceway (4) is equal 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520122096.9U CN204493528U (en) | 2015-03-02 | 2015-03-02 | Parking stroke adjustment screw rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520122096.9U CN204493528U (en) | 2015-03-02 | 2015-03-02 | Parking stroke adjustment screw rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204493528U true CN204493528U (en) | 2015-07-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520122096.9U Active CN204493528U (en) | 2015-03-02 | 2015-03-02 | Parking stroke adjustment screw rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204493528U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111356855A (en) * | 2017-11-21 | 2020-06-30 | Gkn汽车有限公司 | Method for controlling actuator for clutch |
-
2015
- 2015-03-02 CN CN201520122096.9U patent/CN204493528U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111356855A (en) * | 2017-11-21 | 2020-06-30 | Gkn汽车有限公司 | Method for controlling actuator for clutch |
| CN111356855B (en) * | 2017-11-21 | 2021-10-15 | Gkn汽车有限公司 | Method for controlling actuator for clutch |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |