CN202510597U

CN202510597U - Braking-clearance adjusting arm and vehicle with same

Info

Publication number: CN202510597U
Application number: CN2012201151217U
Authority: CN
Inventors: 李学峰; 靳增鑫; 王荣兵
Original assignee: Sany Heavy Industry Co Ltd
Current assignee: Sany Automobile Manufacturing Co Ltd
Priority date: 2012-03-24
Filing date: 2012-03-24
Publication date: 2012-10-31
Anticipated expiration: 2022-03-24

Abstract

The utility model discloses a braking-clearance adjusting arm and a vehicle with the same. The braking-clearance adjusting arm is in a plum-blossom sleeve type. The braking-clearance adjusting arm comprises a shell, a worm wheel, a worm and a worm shaft, wherein the shell is provided with a through hole; the worm wheel is arranged in the shell; the worm is meshed with the worm wheel; and the worm and the worm shaft are rotatably arranged in the through hole and are integrally formed. The utility model has the advantages that the stress concentration generated at the tooth root surface of the worm can be avoided, so that the fracture phenomenon of the tooth shape of the worm is effectively prevented and the service life of the adjusting arm is prolonged.

Description

Brake clearance is adjusted arm and is had its vehicle

Technical field

The utility model relates to a kind of adjustment arm, and particularly a kind of brake clearance is adjusted arm and had its vehicle.

Background technique

In the using process of vehicle, owing to the wearing and tearing of Brake shoe lining or brake drum lose reasons such as circle, can cause brake clearance to increase, and then cause the time lengthening even the inefficacy of braking; On the other hand, the friction plate abrasion degree of each wheel is different, and the brake clearance of each wheel is not waited, and sideslip takes place when causing car brakeing, brings potential safety hazard to vehicle driving.For guaranteeing that vehicle normally moves, require brake clearance will remain on normal, a rational value, generally be the staff when vehicle maintenance is maintained, adjust arm through the operation brake clearance and adjust brake clearance.

At present, plum blossom shell type brake clearance adjustment arm is the most common brake clearance adjustment arm, uses also extensive; With reference to figure 1; For existing plum blossom shell type brake clearance adjustment arm configuration schematic representation, as shown in the figure, existing plum blossom shell type brake clearance adjustment arm includes: housing 1 '; Be provided with worm gear 2 ' and worm screw 3 ' in the housing 1 ', worm gear 2 ' is meshing with each other with worm screw 3 ', and worm screw 3 ' middle part is equipped with worm shaft 31 ', is interference fit between worm screw 3 ' and the worm shaft 31 ', so that worm screw 3 ' can be rotated with worm shaft 31 ' synchronously; Offer the through hole 4 ' of ccontaining worm screw 3 ' and worm shaft 31 ' on the housing 1 '; The intermediate section internal diameter of ccontaining worm screw 3 ' is bigger in the through hole 4 ', and the part internal diameter of the ccontaining worm shaft 31 ' in both sides is less, and an end of worm shaft 31 ' is that plum-blossom sleeve turn end 311 ' rotates plum-blossom sleeve turn end 311 '; The worm shaft 31 ' that makes with quantitative turns over small angle; Worm shaft 31 ' drives worm screw and rotates, and then drives the worm gear rotation, the final purpose that realizes the adjustment brake clearance.

But there is following defective in above-mentioned existing plum blossom shell type brake clearance adjustment arm: worm screw and worm shaft are split type; Though adopt interference fit that the two can be rotated synchronously; But the tooth flank worm screw can produce the comparison serious stress concentration; Make profile of tooth have the potential failure problem that ruptures, and problem take place in practical application; The phenomenon of fracture damage very easily takes place in the effect of the dual power that the housing parts around the plum-blossom sleeve turn end will be squeezed and stretch; The through hole intermediate section internal diameter of offering on the housing is bigger; Be used for ccontaining worm screw; And the internal diameter of both sides is less, is used for ccontaining worm shaft, because machining accuracy can not reach idealized; This structural type can cause the axial runout of worm screw and worm shaft in practical application, and then causes problems such as rollback inefficacy.

In view of the foregoing, the design people borrows its technical experience of association area and abundant professional knowledge for many years, and constantly research and development improve, and through a large amount of practical proofs, have proposed the brake clearance adjustment arm of the utility model and had the technological scheme of its vehicle.

The model utility content

The purpose of the utility model is to provide a kind of brake clearance adjustment arm, can avoid the worm screw tooth flank to produce stress and concentrate, thereby effectively prevent worm screw profile of tooth phenomenon of rupture.

Another purpose of the utility model is to provide a kind of vehicle, and it is provided with the brake clearance adjustment arm of the utility model, can avoid worm screw profile of tooth phenomenon of rupture, and increase working life.

To achieve these goals, the utility model provides a kind of brake clearance adjustment arm, is plum blossom shell type brake clearance adjustment arm, and it comprises: housing offers through hole; Worm gear is arranged in the said housing; Worm screw and worm shaft, that can rotate is arranged in the said through hole, and said worm screw is meshed with said worm gear, and said worm screw and worm shaft are integrally formed.

Above-mentioned brake clearance adjustment arm; Wherein, Said through hole includes first section and second section, and said first section internal diameter is greater than said second section internal diameter, and the worm shaft of said worm screw and one of which side is arranged in said first section; The worm shaft of said worm screw opposite side is arranged in said second section, and the axle head that is arranged at the said worm shaft in said second section is a plum-blossom sleeve turn end.

Above-mentioned brake clearance adjustment arm; Wherein, be provided with spacing lining in said first section, the axle head of said worm shaft is connected in said spacing lining; Said first section opening portion that is positioned at said surface of shell is provided with end cap; Be provided with damping spring between said spacing lining and the said end cap, said damping spring one end is connected in said spacing lining, and the other end is connected in said end cap.

Above-mentioned brake clearance adjustment arm, wherein, the wall thickness of the said housing around the said plum-blossom sleeve turn end is smaller or equal to 15 millimeters more than or equal to 10 millimeters.

Above-mentioned brake clearance adjustment arm, wherein, the surface of contact tooth-shape angle of said worm gear and worm screw is to spend smaller or equal to 22.5 more than or equal to 15 degree, the another side tooth-shape angle is smaller or equal to 42 degree more than or equal to 22.5 degree.

To achieve these goals, the utility model also provides a kind of vehicle, and it is provided with the brake clearance adjustment arm of above-mentioned the utility model.

From the above, the brake clearance of the utility model adjustment arm and vehicle with it have advantage and characteristics:

1, the brake clearance of the utility model adjustment arm is designed to integral structure with worm screw of the prior art and worm shaft, can avoid the worm screw tooth flank to produce stress and concentrate, thereby prevent the problem that the worm screw profile of tooth ruptures, and prolonged the working life of parts.

2, the through hole of the brake clearance of the utility model adjustment arm housing adopts the large aperture to connect the structural type of small aperture; Ccontaining worm screw in the section of large aperture; And can set up the thrust spring; Ccontaining worm shaft and plum-blossom sleeve rotating mechanism etc. in the section of small aperture, axial runout in the time of can effectively preventing worm screw work is like this avoided adjusting the arm rollback and was lost efficacy.

3, the part of the housing of the brake clearance of the utility model adjustment arm around plum-blossom sleeve turn end thickeied design, avoids the housing excessive and fracture damage of stress herein.

4, the brake clearance of the utility model adjustment arm has carried out optimal design to the profile of tooth of worm and gear, has adjusted the tooth-shape angle of surface of contact and another side, has strengthened the self-locking property of worm and gear self, has also improved stress performance simultaneously.

5, the brake clearance of the utility model adjustment arm and vehicle with it are on existing structure, to improve design, and be simple in structure, is suitable for applying.

Description of drawings

Fig. 1 is existing plum blossom shell type brake clearance adjustment arm configuration schematic representation;

Fig. 2 is the utility model brake clearance adjustment arm configuration schematic representation;

Fig. 3 is the depression angle schematic representation of Fig. 2.

The primary component label declaration:

1 ' housing

2 ' worm gear

3 ' the worm screw

31 ' worm shaft

311 ' plum-blossom sleeve turn end

4 ' through hole

1 housing

2 worm gears

3 worm screws

31 worm shafts

4 through holes

41 first sections

42 second sections

5 damping springs

6 spacing linings

7 end caps

8 plum-blossom sleeve turn ends

Embodiment

Understand for technical characteristics, purpose and effect to the utility model have more clearly, contrast the embodiment of description of drawings the utility model, but it is merely preferred embodiment, is not used for limiting the essential scope of the utility model at present.

Please combine referring to figs. 2 and 3; Wherein Fig. 2 is the utility model brake clearance adjustment arm configuration schematic representation, and Fig. 3 is the depression angle schematic representation of Fig. 2, and is as shown in the figure; The brake clearance adjustment arm of the utility model is a plum blossom shell type brake clearance adjustment arm; It mainly comprises: housing 1, and it offers through hole 4, is used for ccontaining worm screw 3 and worm shaft 31; Worm gear 2 is arranged in the housing 1; Worm screw 3 and worm shaft 31, that can rotate is arranged in the through hole 4, and worm screw 3 is meshed with worm gear 2, and worm shaft 31 is integrally formed with worm screw 3.

Housing 1 is the installation basis of worm gear 2, worm screw 3 and worm shaft 31, and wherein the installing structure of worm gear 2 is identical with existing technology, repeats no more.Offer through hole 4 on the housing 1, with installing worm screw 3 and worm shaft 31.In the present embodiment; Through hole 4 includes first section 41 and second sections 42; First section 41 internal diameter is greater than second section 42 internal diameter, and the worm shaft 31 of worm screw 3 and one of which side is arranged in first section 41, and the worm shaft 31 of opposite side is arranged in second section 42; Like this, just can avoid to a great extent because machining accuracy is undesirable etc. former thereby the rotation worm screw that causes and worm shaft is unusual.Further, for the axial runout that cushions and avoid worm screw and worm shaft to produce in the course of the work, also damping spring 5 can be set in first section 41; Concrete structure does, a spacing lining 6 is set in first section 41, and worm shaft 31 axle heads that worm screw 3 one sides are stretched out can rotate is connected in this spacing lining 6; Be provided with end cap 7 at first section 41 opening portion that is positioned at housing 1 surface, be covered on first section 41 opening portion, thereby between spacing lining 6 and end cap 7, form a space; Damping spring 5 promptly is arranged in this space, and an end of damping spring 5 is connected in spacing lining 6, and the other end is connected in end cap 7; Like this; When worm screw and worm shaft generation axial runout, damping spring 5 just can play buffer function, thereby guarantees adjustment arm proper functioning.

Worm screw 3 and worm shaft 31 are arranged at respectively in first section 41 and second sections 42 of through hole, and worm screw 3 is one of the forming with worm shaft 31, can avoid the worm screw tooth flank to produce stress and concentrate, thereby prevent the problem that the worm screw profile of tooth ruptures.Worm screw 3 diameters are bigger; The worm shaft 31 of worm screw 3 and one of which side is arranged in bigger first section 41 of internal diameter, and the worm shaft 31 of worm screw 3 opposite sides then is arranged in less second section 42 of internal diameter, and the axle head of the worm shaft 31 in being arranged at second section 42 is a plum-blossom sleeve turn end 8; Be used for the quantitative worm shaft that makes and turn over small angle; Realizing fine setting, be existing technology about the concrete structure and the working principle of plum-blossom sleeve turn end 8, so repeat no more.Rupture for fear of the part of housing 1 around plum-blossom sleeve turn end 8; The part of the adjustment arm housing of the utility model around plum-blossom sleeve turn end 8 carried out the thickening design; In the present embodiment, housing 1 wall thickness around the plum-blossom sleeve turn end 8 is smaller or equal to 15 millimeters more than or equal to 10 millimeters.

In addition; Self-locking property for worm and gear self; The adjustment arm of the utility model has also carried out optimal design to the profile of tooth to worm and gear; The surface of contact tooth-shape angle that is specially turbine and worm is designed to spend smaller or equal to 22.5 more than or equal to 15 degree, and the another side tooth-shape angle is designed to more than or equal to 22.5 degree smaller or equal to 42 degree.

The structure that more than is the brake clearance adjustment arm of the utility model is formed, and as for other assemblies of the adjustment arm of not mentioning and structure thereof, principle, all belongs to existing technology, so do not giving unnecessary details.

In addition, the utility model also proposes a kind of vehicle, and it is provided with the brake clearance adjustment arm of above-mentioned the utility model; Can avoid worm screw profile of tooth phenomenon of rupture; Increase the service life, wherein structure, principle and the effect of brake clearance adjustment arm are identical with above-mentioned record, so no longer repeat specification.

The above is merely the schematic embodiment of the utility model, is not in order to limit the scope of the utility model.Any those skilled in the art, equivalent variations of under the prerequisite of design that does not break away from the utility model and principle, having done and modification all should belong to the scope that the utility model is protected.

Claims

1. a brake clearance adjustment arm is characterized in that, said brake clearance adjustment arm is a plum blossom shell type brake clearance adjustment arm, and it comprises:

Housing (1) offers through hole (4);

Worm gear (2) is arranged in the said housing (1);

Worm screw (3) and worm shaft (31), that can rotate is arranged in the said through hole (4), and said worm screw (3) is meshed with said worm gear (2), and said worm screw (3) is one of the forming with worm shaft (31).

2. brake clearance adjustment arm according to claim 1; It is characterized in that; Said through hole (4) includes first section (41) and second section (42); The internal diameter of said first section (41) is greater than the internal diameter of said second section (42); The worm shaft (31) of said worm screw (3) and one of which side is arranged in said first section (41), and the worm shaft (31) of said worm screw (3) opposite side is arranged in said second section (42), and the axle head that is arranged at the said worm shaft (31) in said second section (42) is a plum-blossom sleeve turn end (8).

3. brake clearance adjustment arm according to claim 2; It is characterized in that be provided with spacing lining (6) in said first section (41), the axle head of said worm shaft (31) is connected in said spacing lining (6); The opening portion that said first section (41) are positioned at said housing (1) surface is provided with end cap (7); Be provided with damping spring (5) between said spacing lining (6) and the said end cap (7), said damping spring (5) one ends are connected in said spacing lining (6), and the other end is connected in said end cap (7).

4. according to claim 2 or 3 described brake clearance adjustment arms, it is characterized in that the wall thickness of said plum-blossom sleeve turn end (8) said housing (1) on every side is smaller or equal to 15 millimeters more than or equal to 10 millimeters.

5. brake clearance adjustment arm according to claim 1 is characterized in that the surface of contact tooth-shape angle of said worm gear (2) and worm screw (3) is to spend smaller or equal to 22.5 more than or equal to 15 degree, and the another side tooth-shape angle is smaller or equal to 42 degree more than or equal to 22.5 degree.

6. vehicle, its spy just is that said vehicle is provided with each described brake clearance adjustment arm of claim 1 to 5.