CN216691939U

CN216691939U - Cover plate for disc brake

Info

Publication number: CN216691939U
Application number: CN202220176684.0U
Authority: CN
Inventors: 郭海广; 李瑞栋; 张永杰
Original assignee: Hebei Aiste Vehicle And Bridge Co ltd
Current assignee: Hebei Aiste Vehicle And Bridge Co ltd
Priority date: 2022-01-21
Filing date: 2022-01-21
Publication date: 2022-06-07
Anticipated expiration: 2032-01-21

Abstract

The utility model provides a cover plate for a disc brake, which is used for covering a box shell of the disc brake, wherein the disc brake is provided with a plurality of push rod holes for push rods to pass through, and the cross section shape of the push rods is composed of a pair of parallel straight lines and a pair of circular arc lines. The cross-section of push rod hole comprises the combination arc limit of a pair of parallel sharp limit and a pair of symmetry, the combination arc limit includes the main part circular arc and is located the transition curve at main part circular arc both ends, the transition curve is located combination arc limit with the position that the straight line limit was bordered, just the transition curve for the main part circular arc, the direction of keeping away from the centre of a circle of main part circular arc are outstanding. The cover plate adopts a novel push rod hole shape, can avoid the phenomenon of blocking of the push rod, and can also keep the stability of the push rod in reciprocating motion.

Description

Cover plate for disc brake

Technical Field

The utility model relates to the field of brakes, in particular to a cover plate for a disc brake.

Background

The rotating element in a friction pair of a disc brake is a metal disc working with end faces, called a brake disc. The friction elements grip the brake disc from both sides to produce braking. The fixing elements have various structural forms, and can generally divide the disc brake into a caliper disc type and a full disc type. The fixed and rotating elements of an all-disc brake friction pair are disc-shaped, referred to as fixed and rotating discs, respectively. All the working surfaces of the brake disc can be simultaneously contacted with the friction plates, and the structure principle of the brake disc is similar to that of a friction clutch.

The spiral force-increasing mechanism is less applied to the disc brake, and in the prior art shown in fig. 5, because the push rod is subjected to a larger thrust of the ramp gear, if the cross-sectional shape of the push rod is completely the same as the shape of the push rod hole of the cover plate, or if the push rod is adopted in a common transition fillet, the push rod is easily stuck. If the push rod holes of the cover plate are equidistantly enlarged relative to the shape of the push rod, the push rod is easy to shake, the transmission braking force is not facilitated, and the structural stability of the brake is seriously influenced.

SUMMERY OF THE UTILITY MODEL

In view of the above, embodiments of the present invention provide a cover plate for a disc brake to obviate or mitigate one or more of the disadvantages of the prior art.

The technical scheme of the utility model is as follows:

the cover plate is used for sealing a box shell of the disc brake, the disc brake is provided with a plurality of push rod holes for push rods to pass through, the cross section of each push rod hole is composed of a pair of parallel straight lines and a pair of arc lines, the cross section of each push rod hole is composed of a pair of parallel straight line edges and a pair of symmetrical combined arc edges, each combined arc edge comprises a main body arc and transition curves located at two ends of the main body arc, each transition curve is located at the junction of the combined arc edge and the corresponding straight line edge, and each transition curve protrudes towards the direction far away from the circle center of the main body arc relative to the corresponding main body arc.

In some embodiments, the distance between the two combined arc-shaped edges is greater than the distance between the two arc lines of the push rod hole, so that a gap is formed between the wall surface where the combined arc-shaped edges of the push rod hole are located and the arc-shaped side surface of the push rod.

In some embodiments, the gap between the region of the transition curve of the pushrod hole and the arcuate side of the pushrod is greater than the gap between the region of the body arc and the arcuate side of the pushrod.

In some embodiments, the gap between the area of the main body arc and the arc-shaped side surface of the push rod hole is 0.5-2 mm.

In some embodiments, the transition curve is shaped as a truncated plum-blossom type structure.

In some embodiments, the length of the straight line edge of the push rod hole is equal to the length of the parallel straight line of the push rod, and the distance between the two straight line edges is equal to the distance between the two parallel straight lines of the push rod.

The cover plate of the embodiment of the utility model adopts a novel push rod hole shape, so that the phenomenon of blocking of the push rod can be avoided, and the stability of the push rod in reciprocating motion can be kept.

Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model. The objectives and other advantages of the utility model will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

It will be appreciated by those skilled in the art that the objects and advantages that can be achieved with the present invention are not limited to the specific details set forth above, and that these and other objects that can be achieved with the present invention will be more clearly understood from the detailed description that follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the utility model and together with the description serve to explain the principles of the utility model. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the utility model. For purposes of illustrating and describing some portions of the present invention, corresponding parts of the drawings may be exaggerated, i.e., may be larger, relative to other components in an exemplary apparatus actually manufactured according to the present invention. In the drawings:

fig. 1 is a schematic structural diagram of a cover plate according to an embodiment of the utility model.

Fig. 2 is a schematic structural view of a push rod hole of a cover plate according to an embodiment of the utility model.

Fig. 3 is a schematic structural diagram of a cover plate and a push rod in an embodiment of the utility model.

FIG. 4 is a schematic view of the push rod and the push rod hole according to an embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a disc brake in the prior art.

Reference numerals:

1. a cover plate; 10. a push rod aperture; 110. a straight line edge; 120. combining the arc edges; 121. a main body arc; 122. a transition curve; 2. a push rod; 210. parallel straight lines; 220. a circular arc line;

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following embodiments and the accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.

It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the scheme according to the present invention are shown in the drawings, and other details not so relevant to the present invention are omitted.

It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, elements, steps or components, but does not preclude the presence or addition of one or more other features, elements, steps or components.

It is also noted herein that the term "coupled," if not specifically stated, may refer herein to not only a direct connection, but also an indirect connection in which an intermediate is present.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, the same reference numerals denote the same or similar components, or the same or similar steps.

Fig. 5 is a schematic view showing a structure of a disc brake in the prior art, which may include a driving device, a transmission device, a brake disc 600, friction plates, a housing, and the like.

Wherein the housing may include the housing 200, the cover plate 240, and the outer cover 700 arranged in the axial direction of the brake disc 600 and relatively fixedly coupled by the coupling member. Wherein the housing 200 is used to mount the transmission, the cover 240 is used to cover the housing 200 and attach the brake to the axle flange, and the outer cover 700 is used to cover the brake disc 600. The housing 200 and the outer cover 700 serve primarily as housings for the brake of the present invention, and the cover 240 is interposed between the housing 200 and the outer cover 700 for enclosing a portion of the actuator within the housing 200 and mounting the brake to the axle flange.

The disc brake can be driven by using the air chamber push rod 100 of the existing drum brake and an automatic adjusting mechanism or an electric device as a driving device. The transmission may use the principles of gear transmission and screw transmission to convert circular motion into linear motion of the friction plates, thereby generating a braking torque. The friction plates are disposed on both sides of the brake disc and may include dynamic friction plates 810 and static friction plates 820. The transmission means may include a gear shaft 400, a ramp gear 300, a push rod 100, and the like. The ramp gear 300 is a ring gear with partial internal teeth, and the gear shaft 400 is internally engaged with the ring gear. The outer peripheral surface of the ramp gear 300 is provided with a plurality of spiral ramps, the push rod 100 is arranged at the ramps, under the limiting action of the limiting hole of the cover plate 240, the push rod 100 moves along a straight line and pushes the thrust frame 500 to be close to the brake disc 600, the dynamic friction plate 810 is pushed to be pressed against one end of the brake disc 600, the brake disc 600 slides in a small displacement manner in the axial direction of the outer hub and is pressed with the friction plates on two sides of the brake disc 600, and therefore braking torque is generated.

In the disc brake, the push rod is subjected to the larger thrust of the ramp gear, and if the cross section of the push rod is completely the same as the shape of a push rod hole of the cover plate, or a common transition fillet is adopted, the phenomenon of dead locking of the push rod is easily caused. If the push rod holes of the cover plate are equidistantly enlarged relative to the shape of the push rod, the push rod is easy to shake, the transmission braking force is not facilitated, and the structural stability of the brake is seriously influenced.

To solve the above problems, the present invention provides a cover plate for a disc brake. The cover plate adopts a novel push rod hole shape, can avoid the phenomenon of blocking of the push rod, and can also keep the stability of the push rod in reciprocating motion.

The cover plate 1 of the embodiment of the present invention is used for covering a housing of a disc brake having a plurality of push rod holes 10 for passing push rods 2 therethrough, wherein the cross-sectional shape of the push rods 2 is composed of a pair of parallel straight lines 210 and a pair of circular arc lines 220. The cross section referred to herein means a cross-sectional plane perpendicular to the axial direction.

As shown in fig. 1 and 2, fig. 2 is a partial view of the push rod hole 10 of the cover plate 1. In some embodiments, the cross-section of the push rod hole 10 is composed of a pair of parallel straight edges 110 and a pair of symmetrical combined arc edges 120, the combined arc edges 120 include a main body arc 121 and transition curves 122 at two ends of the main body arc 121, the transition curves 122 are located at the junction of the combined arc edges 120 and the straight edges 110, and the transition curves 122 protrude in a direction away from the center of the main body arc 121 relative to the main body arc 121. The term protruding as used herein may also refer to a putter bore 10 having a greater depth and curvature of depression at the intersection of the straight edge 110 and the combined arcuate edge 120.

In the above embodiment, because the conventional round corner transition structure is not adopted at the junction of the straight line edge and the combined arc edge of the push rod hole, the push rod hole does not contact with the transition part of the push rod at the junction of the straight line edge and the combined arc edge, and therefore the push rod is not blocked.

In some embodiments, as shown in fig. 3 and 4, the distance between the two combined arc-shaped edges 120 is greater than the distance between the two arc lines 220 of the putter hole 10, so that the wall surface of the putter hole 10 where the combined arc-shaped edges 120 are located has a gap with the arc-shaped side surface of the putter 2. Correspondingly, the length of the straight line edge 110 of the push rod hole 10 is equal to the length of the parallel straight line 210 of the push rod 2, and the distance between two straight line edges 110 is equal to the distance between two parallel straight lines 210 of the push rod 2.

In the above embodiments, the straight edge 110 of the push rod hole 10 or the parallel straight line 210 of the push rod 2 can be seen to be approximately tangential to the contact point where the ramp gear pushes the push rod 2. As shown in fig. 4, the wall surface of the combined arc-shaped edge 120 of the push rod hole 10 has a gap with the arc-shaped side surface of the push rod 2, so that the push rod 2 can move in a small range in the direction of the straight edge 110 of the push rod hole 10 to maintain dynamic balance. The distance between the two straight edges 110 of the push rod hole 10 is equal to the distance between the two parallel straight lines 210 of the push rod 2, so that the push rod 2 cannot move in the direction perpendicular to the straight edges 110 of the push rod hole 10, thereby ensuring that the push rod 2 does not shake.

In some embodiments, as shown in fig. 4, the gap between the region of the transition curve 122 of the pushrod hole 10 and the arc-shaped side surface of the pushrod 2 is larger than the gap between the region of the body arc 121 and the arc-shaped side surface of the pushrod 2.

In some embodiments, the gap between the area of the main body arc 121 and the arc-shaped side surface of the push rod 2 of the push rod hole 10 is 0.5-2 mm, preferably 1-1.5 mm.

In some embodiments, the transition curve 122 is shown as having a cut-off-plum-type configuration. Alternatively, the corner cut quincunx-shaped structure may be tangent to the straight edge 110, or may be tangent to the body arc 121.

According to the cover plate for the disc brake of the embodiment of the utility model, the obtained beneficial effects at least comprise that: the cover plate adopts a novel push rod hole shape, can avoid the phenomenon of blocking of the push rod, and can also keep the stability of the push rod in reciprocating motion.

Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments and/or in combination with or instead of the features of the other embodiments in the present invention.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made to the embodiment of the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A cover plate for a disc brake for closing a housing of the disc brake, the disc brake having a plurality of push rod holes for passing push rods therethrough, the push rods having a sectional shape consisting of a pair of parallel straight lines and a pair of circular arc lines,

the cross-section of push rod hole comprises the combination arc limit of a pair of parallel sharp limit and a pair of symmetry, the combination arc limit includes the main part circular arc and is located the transition curve at main part circular arc both ends, the transition curve is located combination arc limit with the position that the straight line limit was bordered, just the transition curve for the main part circular arc, the direction of keeping away from the centre of a circle of main part circular arc are outstanding.

2. The cover plate for a disc brake according to claim 1, wherein a distance between the two combined arc-shaped edges is greater than a distance between two arc lines of the push rod hole, so that a wall surface where the combined arc-shaped edges of the push rod hole are located has a gap with an arc-shaped side surface of the push rod.

3. The cover plate for a disc brake of claim 2, wherein the push rod hole has a larger clearance between the area of the transition curve and the arc-shaped side surface of the push rod than between the area of the main body arc and the arc-shaped side surface of the push rod.

4. The cover plate for a disc brake according to claim 3, wherein a gap between the region of the circular arc of the body of the push rod hole and the arc-shaped side surface of the push rod is 0.5-2 mm.

5. Cover plate for a disc brake according to claim 1, characterized in that the shape of the transition curve is a truncated-plum-type structure.

6. The cover plate for a disc brake according to claim 1, wherein the linear side of the push rod hole has a length equal to a length of a parallel straight line of the push rod, and a distance between two of the linear sides is equal to a distance between two parallel straight lines of the push rod.