CN204127171U - With the air-pressure disc brake pressure arm of bearing limit structure - Google Patents
With the air-pressure disc brake pressure arm of bearing limit structure Download PDFInfo
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- CN204127171U CN204127171U CN201420414231.2U CN201420414231U CN204127171U CN 204127171 U CN204127171 U CN 204127171U CN 201420414231 U CN201420414231 U CN 201420414231U CN 204127171 U CN204127171 U CN 204127171U
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- cambered surface
- pressure arm
- circle cambered
- slewing circle
- disc brake
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Abstract
The utility model relates to a kind of air-pressure disc brake pressure arm with bearing limit structure, comprise pressure arm, one end of pressure arm is forced section, the other end is spinning portion, and the internal surface in spinning portion is slewing circle cambered surface, and outer surface is thrust arc surface, fulcrum cylinder is located in the recess of slewing circle cambered surface formation, and fulcrum cylinder is arranged with slewing circle cambered surface is concentric, multiple needle bearing is arranged around fulcrum cylinder, and the side of fulcrum cylinder away from slewing circle cambered surface be located at by positioning block; Spinning portion is provided with a limiting stopper in the upper end of slewing circle cambered surface, and the lower end in slewing circle cambered surface is provided with a banking stop, the lower end surface of limiting stopper higher than the internal surface of positioning block, lower than the top of the needle bearing near limiting stopper.With the air-pressure disc brake pressure arm of bearing limit structure by the acting in conjunction of limiting stopper and banking stop, ensure that needle bearing is in the scope of slewing circle cambered surface of pressure arm all the time, ensure that the normal work of pressure arm.
Description
Technical field
The utility model relates to a kind of air-pressure disc brake pressure arm, particularly relates to a kind of air-pressure disc brake pressure arm with bearing limit structure.
Background technique
At present, disk type braker has the incomparable advantage of drum brake, and air-pressure disc brake is also more and more extensive in the application in commercial car field.Air-pressure disc brake is by providing stable effective braking moment, and the moment of the obstruction vehicle wheel rotation produced by friction plate and brake disc realizes braking.Pressure arm, as the parts of boosting mechanism most critical, to be carried out the increase on multiple, provides enough braking moments to the Input Forces that cylinder inputs by lever principle.
Pressure arm is fixed on caliper body by needle bearing, fulcrum cylinder and positioning block, and when pressure arm is actuated by cylinder, rotational circle cambered surface is around axle central rotation, and the sliding bearing of a low coefficient of friction or needle bearing roll around an immovable point on pressure arm.The pressure arm thrust face circular arc center of circle is when maximum travel position, and the center of circle can left, (generation braking force) and above-below direction respectively produce a displacement simultaneously.Pressure arm turns to position two from position one, rotate circular arc home position constant, thrust face circular arc home position changes, the horizontal component (being 3.8mm in Fig. 1) of displacement represents reference seat and moves the direction producing friction plate thrust, and the vertical component (being 0.31mm in Fig. 1) of displacement represents needle thrust bearing and moves towards the direction parallel with brake disc.Simultaneously, the sliding bearing of low coefficient of friction or needle bearing roll certain distance in the small arc-shaped of pressure arm, due to sliding bearing or needle bearing slow relative to pressure arm circular motion speed, through repeatedly braking, sliding bearing or needle bearing have the movement tendency (as shown in Fig. 2 Fig. 3) rolling out pressure arm small arc-shaped.And if sliding bearing or needle bearing roll out pressure arm small arc-shaped, fulcrum cylinder can directly contact with pressure arm small arc-shaped, causes braking system stuck, causes whole brake system non-functional.How to reduce or to eliminate sliding bearing or needle bearing rolls out one of pressure arm small arc-shaped purpose of design present just.
Therefore be necessary to design a kind of air-pressure disc brake pressure arm with bearing limit structure, to overcome the problems referred to above.
Model utility content
The purpose of this utility model is the defect overcoming prior art, provides a kind of air-pressure disc brake pressure arm with bearing limit structure avoiding needle bearing to roll out in movement process.
The utility model is achieved in that
The utility model provides a kind of air-pressure disc brake pressure arm with bearing limit structure, comprises pressure arm, and described pressure arm is fixed on the caliper body of air-pressure disc brake by needle bearing, fulcrum cylinder and positioning block; One end of described pressure arm is forced section, the other end is spinning portion, the internal surface in described spinning portion is slewing circle cambered surface, outer surface is thrust arc surface, described fulcrum cylinder is located in the recess of described slewing circle cambered surface formation, and described fulcrum cylinder is arranged with described slewing circle cambered surface is concentric, multiple described needle bearing is arranged around described fulcrum cylinder, and between described slewing circle cambered surface and described fulcrum cylinder, the side of described fulcrum cylinder away from described slewing circle cambered surface be located at by described positioning block; Described spinning portion is provided with a limiting stopper in the upper end of described slewing circle cambered surface, lower end in described slewing circle cambered surface is provided with a banking stop, wherein, the lower end surface of described limiting stopper higher than the internal surface of described positioning block, lower than the top of the needle bearing near described limiting stopper.
Further, described thrust arc surface and described fulcrum cylinder decentraction are arranged.
Further, described limiting stopper and described spinning portion one-body molded.
Further, described limiting stopper is mounted on the upper end of described slewing circle cambered surface.
Further, described banking stop is fixed on the lower end of described slewing circle cambered surface by rivet, for keeping out the needle bearing near described banking stop.
Further, the outside of the underpart in described spinning portion is provided with a groove, has a through hole in described groove, and described through hole is communicated with the outside of the underpart in described slewing circle cambered surface and described spinning portion, and described rivet is located in described through hole.
Further, described banking stop extends from the outer lateral buckling of the underpart in described spinning portion and covers the underpart in described spinning portion, then bending extends inwardly to the lower end of described slewing circle cambered surface.
Further, described spinning portion bends extension downwards by described forced section and forms, the curved structure in described spinning portion.
The utility model has following beneficial effect:
Described spinning portion is provided with a limiting stopper in the upper end of described slewing circle cambered surface, lower end in described slewing circle cambered surface is provided with a banking stop, the lower end surface of described limiting stopper higher than the internal surface of described positioning block, lower than the top of the needle bearing near described limiting stopper.When needle bearing moves to the position of limiting stopper, needle bearing continues in the process of moving backward, and limiting stopper can by needle bearing clawback, thus limits needle bearing and roll out from the slewing circle cambered surface of pressure arm; When needle bearing moves to banking stop, continue in the process of moving forward at needle bearing, banking stop can by needle bearing clawback, thus limits needle bearing and roll out from the slewing circle cambered surface of pressure arm, ensure that the normal work of the air-pressure disc brake pressure arm with bearing limit structure.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of existing pressure arm;
Fig. 2 is the movement tendency figure of the needle bearing of existing pressure arm;
Fig. 3 is another movement tendency figure of the needle bearing of existing pressure arm;
The structural representation of the air-pressure disc brake pressure arm with bearing limit structure that Fig. 4 provides for the utility model embodiment;
The stereogram of the pressure arm that Fig. 5 provides for the utility model embodiment.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technological scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, other embodiments all that those of ordinary skill in the art obtain under the prerequisite not making creative work, belong to the scope of the utility model protection.
As Fig. 1 to Fig. 5, the utility model embodiment provides a kind of air-pressure disc brake pressure arm with bearing limit structure, comprise pressure arm 1, described pressure arm 1 is fixed on the caliper body of air-pressure disc brake by needle bearing 3, fulcrum cylinder 2 and positioning block 6.
As Fig. 1 to Fig. 5, one end of described pressure arm 1 is forced section 1a, and the other end is spinning portion 1b, and described spinning portion 1b bends extension downwards by described forced section 1a and forms, the curved structure of described spinning portion 1b.The internal surface of described spinning portion 1b is slewing circle cambered surface 1d, and outer surface is thrust arc surface, and described fulcrum cylinder 2 is located in the recess of described slewing circle cambered surface 1d formation, and described fulcrum cylinder 2 is arranged with described slewing circle cambered surface 1d is concentric.Described thrust arc surface is then arranged with described fulcrum cylinder 2 decentraction, makes the angle of swing of described thrust arc surface and described slewing circle cambered surface 1d inconsistent.
As Fig. 1 to Fig. 5, multiple described needle bearing 3 is arranged around described fulcrum cylinder 2, and between described slewing circle cambered surface 1d and described fulcrum cylinder 2, the side of described fulcrum cylinder 2 away from described slewing circle cambered surface 1d be located at by described positioning block 6, and described positioning block 6 states fulcrum cylinder 2 for supporting residence.
As Fig. 1 to Fig. 5, described spinning portion 1b is provided with a limiting stopper 1c in the upper end of described slewing circle cambered surface 1d, and in this preferred embodiment, described limiting stopper 1c and described spinning portion 1b is one-body molded, that is to say, described limiting stopper 1c is formed by projection on described spinning portion 1b.In other embodiments, described limiting stopper 1c is mounted on the upper end of described slewing circle cambered surface 1d, that is to say, described limiting stopper 1c is shaping separately, then is installed on the upper end of slewing circle cambered surface 1d of described spinning portion 1b.Wherein, the lower end surface of described limiting stopper 1c higher than the internal surface of described positioning block 6, and lower than the top of the needle bearing 3 near described limiting stopper 1c.The lower end surface of described limiting stopper 1c is used for preventing from producing between described limiting stopper 1c and described positioning block 6 interfering higher than the internal surface of described positioning block 6, thus affects the normal work of independent pressure arm 1; The lower end surface of described limiting stopper 1c is lower than the top of the needle bearing 3 near described limiting stopper 1c, for withstanding described needle bearing 3, if the lower end surface of described limiting stopper 1c is higher than the top of the needle bearing 3 near described limiting stopper 1c, then described positioning block 6 can spacing needle bearing 3, and needle bearing 3 still easily rolls out.
As Fig. 1 to Fig. 5, described spinning portion 1b is provided with a banking stop 4 in the lower end of described slewing circle cambered surface 1d, described banking stop 4 is fixed on the lower end of described slewing circle cambered surface 1d by rivet, for keeping out the needle bearing 3 near described banking stop 4, prevents needle bearing 3 from rolling out.In this preferred embodiment, the outside of the underpart of described spinning portion 1b is provided with a groove and (illustrates, non-label), there is in described groove a through hole 1e, described through hole 1e is communicated with the outside of the underpart of described slewing circle cambered surface 1d and described spinning portion 1b, described rivet is located in described through hole 1e, described banking stop 4 is fixed by described rivet, described banking stop 4 extends from the outer lateral buckling of the underpart of described spinning portion 1b and covers the underpart of described spinning portion 1b, bending extends inwardly to the lower end of described slewing circle cambered surface 1d again, thus the needle bearing 3 located bottom can be withstood.
As Fig. 1 to Fig. 5, the forced section 1a of described pressure arm 1 is actuated by cylinder, spinning portion 1b is around fulcrum cylinder 2 central rotation, and the thrust face circular arc center of circle of pressure arm 1 is moving in maximum travel position process, and described needle bearing 3 rolls in the slewing circle cambered surface 1d of pressure arm 1.Within the scope of the small arc-shaped that the slewing circle cambered surface 1d of pressure arm 1 is formed, identical with slewing circle cambered surface 1d linear velocity with the needle roller linear velocity of the needle bearing 3 that slewing circle cambered surface 1d contacts, needle bearing 3 central diameter is less than slewing circle cambered surface 1d, therefore the angular velocity of needle bearing 3 is less than the angular velocity of slewing circle cambered surface 1d, namely the small arc-shaped that needle bearing 3 is formed relative to the slewing circle cambered surface 1d of pressure arm 1 rolls slowly, after the braking of certain number of times, needle bearing 3 has the trend outwards rolled out in pressure arm 1 small arc-shaped.
As Fig. 1 to Fig. 5, described spinning portion 1b is provided with limiting stopper 1c in the upper end of described slewing circle cambered surface 1d, lower end in described slewing circle cambered surface 1d is provided with banking stop 4, the lower end surface of described limiting stopper 1c higher than the internal surface of described positioning block 6, lower than the top of the needle bearing 3 near described limiting stopper 1c.When needle bearing 3 moves to the position of limiting stopper 1c, continue in the process of moving backward at needle bearing 3, described limiting stopper 1c can by needle bearing 3 clawback, thus limits needle bearing 3 and roll out from the slewing circle cambered surface 1d of pressure arm 1; When needle bearing 3 moves to banking stop 4, continue in the process of moving forward at needle bearing 3, described banking stop 4 can by needle bearing 3 clawback, thus limit needle bearing 3 and roll out from the slewing circle cambered surface 1d of pressure arm 1, ensure that the normal work of the air-pressure disc brake pressure arm 1 with bearing limit structure.
The described air-pressure disc brake pressure arm with bearing limit structure is by the acting in conjunction of described limiting stopper 1c and described banking stop 4, in braking process, described needle bearing 3 is under any circumstance in the scope of slewing circle cambered surface 1d of pressure arm 1 all the time, thus make break provide stable and effective braking moment, ensure traffic safety.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (8)
1. with an air-pressure disc brake pressure arm for bearing limit structure, it is characterized in that, comprise pressure arm, described pressure arm is fixed on the caliper body of air-pressure disc brake by needle bearing, fulcrum cylinder and positioning block;
One end of described pressure arm is forced section, the other end is spinning portion, the internal surface in described spinning portion is slewing circle cambered surface, outer surface is thrust arc surface, described fulcrum cylinder is located in the recess of described slewing circle cambered surface formation, and described fulcrum cylinder is arranged with described slewing circle cambered surface is concentric, multiple described needle bearing is arranged around described fulcrum cylinder, and between described slewing circle cambered surface and described fulcrum cylinder, the side of described fulcrum cylinder away from described slewing circle cambered surface be located at by described positioning block;
Described spinning portion is provided with a limiting stopper in the upper end of described slewing circle cambered surface, lower end in described slewing circle cambered surface is provided with a banking stop, wherein, the lower end surface of described limiting stopper higher than the internal surface of described positioning block, lower than the top of the needle bearing near described limiting stopper.
2., as claimed in claim 1 with the air-pressure disc brake pressure arm of bearing limit structure, it is characterized in that: described thrust arc surface and described fulcrum cylinder decentraction are arranged.
3., as claimed in claim 1 with the air-pressure disc brake pressure arm of bearing limit structure, it is characterized in that: described limiting stopper and described spinning portion one-body molded.
4., as claimed in claim 1 with the air-pressure disc brake pressure arm of bearing limit structure, it is characterized in that: described limiting stopper is mounted on the upper end of described slewing circle cambered surface.
5. as claimed in claim 1 with the air-pressure disc brake pressure arm of bearing limit structure, it is characterized in that: described banking stop is fixed on the lower end of described slewing circle cambered surface by rivet, for keeping out the needle bearing near described banking stop.
6. as claimed in claim 5 with the air-pressure disc brake pressure arm of bearing limit structure, it is characterized in that: the outside of the underpart in described spinning portion is provided with a groove, there is in described groove a through hole, described through hole is communicated with the outside of the underpart in described slewing circle cambered surface and described spinning portion, and described rivet is located in described through hole.
7. as claimed in claim 1 with the air-pressure disc brake pressure arm of bearing limit structure, it is characterized in that: described banking stop extends from the outer lateral buckling of the underpart in described spinning portion and covers the underpart in described spinning portion, then bending extends inwardly to the lower end of described slewing circle cambered surface.
8., as claimed in claim 1 with the air-pressure disc brake pressure arm of bearing limit structure, it is characterized in that: described spinning portion bends extension downwards by described forced section and forms, the curved structure in described spinning portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420414231.2U CN204127171U (en) | 2014-07-25 | 2014-07-25 | With the air-pressure disc brake pressure arm of bearing limit structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420414231.2U CN204127171U (en) | 2014-07-25 | 2014-07-25 | With the air-pressure disc brake pressure arm of bearing limit structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204127171U true CN204127171U (en) | 2015-01-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420414231.2U Active CN204127171U (en) | 2014-07-25 | 2014-07-25 | With the air-pressure disc brake pressure arm of bearing limit structure |
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| CN (1) | CN204127171U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104088935A (en) * | 2014-07-25 | 2014-10-08 | 武汉元丰汽车零部件有限公司 | Air pressure disc brake pressure arm with bearing limiting structure |
-
2014
- 2014-07-25 CN CN201420414231.2U patent/CN204127171U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104088935A (en) * | 2014-07-25 | 2014-10-08 | 武汉元丰汽车零部件有限公司 | Air pressure disc brake pressure arm with bearing limiting structure |
| WO2016011945A1 (en) * | 2014-07-25 | 2016-01-28 | 武汉元丰汽车零部件有限公司 | Pneumatic disc brake pressure arm having bearing limiting structure |
| CN104088935B (en) * | 2014-07-25 | 2017-02-15 | 武汉元丰汽车零部件有限公司 | Air pressure disc brake pressure arm with bearing limiting structure |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |