CN213017390U

CN213017390U - Drum brake shoe fulcrum pin locking structure

Info

Publication number: CN213017390U
Application number: CN202021878245.1U
Authority: CN
Inventors: 齐学先; 林玮静; 许晔; 黄希宾; 王波
Original assignee: Sinotruk Jinan Power Co Ltd
Current assignee: Sinotruk Jinan Power Co Ltd
Priority date: 2020-08-31
Filing date: 2020-08-31
Publication date: 2021-04-20
Anticipated expiration: 2030-08-31

Abstract

The utility model provides a drum brake shoe support pin locking structure, which relates to the drum brake field, and comprises a support pin, a retaining sheet, a fastening bolt and a locking washer, wherein the support pin passes through a brake bottom plate and a brake shoe, the brake bottom plate is provided with the retaining sheet, the support pin is provided with a clamping groove, and the retaining sheet is embedded with the clamping groove; the locking washer is an embedded locking washer, one side of the locking washer is in contact with the fastening bolt, and the other side of the locking washer is in contact with the blocking piece. This scheme can effectively prevent to be not hard up because of the back pin separation blade fastening bolt that vibration and frequent braking arouse, and the compensation is because the pretightning force loss that plastic deformation or fastener inner structure lax lead to, and the while exists can used repeatedly, the equipment is quick simple with the dismantlement, also can effectively improve separation blade and fastening bolt's life, effectively reduces because of the back pin separation blade fastening bolt pine takes off the stopper trouble that leads to.

Description

Drum brake shoe fulcrum pin locking structure

Technical Field

The utility model belongs to the drum brake field, concretely relates to drum brake shoe fulcrum pin locking structure.

Background

At present, the drum brake shoe support pin and the brake bottom plate are assembled by adopting small clearance fit, the support pin locking structure generally and directly adopts a retaining sheet and a fastening bolt structure, and the structure is simpler. There are frequent braking and vibration in the vehicle use, will lead to fulcrum pin and separation blade to produce the trend of rocking like this, and then lead to fastening bolt not hard up. After the retaining plate fastening bolt is loosened, the retaining plate fastening bolt can be quickly separated from the retaining plate to cause braking failure, and the problem that the fastening bolt of the supporting pin retaining plate is loosened due to the fact that the bolt fastening torque cannot meet the requirement in after-sale maintenance also exists.

SUMMERY OF THE UTILITY MODEL

The utility model provides a drum brake shoe round pin locking structure can solve the separation blade and step up the locking structure of fastening bolt and have the problem that the pine takes off in the use.

The utility model provides a drum brake shoe support pin locking structure, including support pin, separation blade, fastening bolt and lock washer, the support pin passes brake bottom plate and brake shoe, install the separation blade on the brake bottom plate, be provided with the draw-in groove on the support pin, the separation blade inlays mutually with the draw-in groove; the locking washer is an embedded locking washer, one side of the locking washer is in contact with the fastening bolt, and the other side of the locking washer is in contact with the blocking piece.

Furthermore, the blocking piece is provided with a threaded hole matched with the position of the brake bottom plate, and the fastening bolt is installed on the brake bottom plate through the threaded hole.

Furthermore, the number of the support pins is two, and the two support pins are respectively arranged on two sides of the blocking piece.

Further, the clamping groove of the support pin is arranged towards the fastening bolt.

Furthermore, the inner side surface of the clamping groove is flush with the blocking piece.

Furthermore, the locking washer is composed of two gaskets, the outer sides of the gaskets are provided with radial teeth, the inner sides of the gaskets are provided with large oblique teeth, the inner sides of the two gaskets are opposite, and the outer sides of the gaskets are respectively meshed with the single sheet and the fastening bolt.

The beneficial effects of the utility model reside in that, the utility model provides a drum brake shoe fulcrum pin locking structure, in the use, frequently brake and when vibration made fulcrum pin and separation blade take place not hard up trend, embedded lock washer both ends face will respectively with separation blade and fastening bolt interlock, and can not take place relative rotation.

At the moment, only the inner oblique teeth of the two gaskets are allowed to relatively dislocate between the inner oblique tooth surfaces of the embedded locking washer to generate lifting tension, so that the locking effect is realized, and the brake failure caused by the loosening of the fastening bolt is effectively reduced.

This scheme can effectively prevent to be not hard up because of the back pin separation blade fastening bolt that vibration and frequent braking arouse, and the compensation is because the pretightning force loss that plastic deformation or fastener inner structure lax lead to, and the while exists can used repeatedly, the equipment is quick simple with the dismantlement, also can effectively improve separation blade and fastening bolt's life, effectively reduces because of the back pin separation blade fastening bolt pine takes off the stopper trouble that leads to.

Furthermore, the utility model relates to a principle is reliable, and simple structure has very extensive application prospect.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic front view of the present invention.

Fig. 2 is a schematic sectional view of the utility model discloses a D direction.

Fig. 3 is a schematic view of an embedded lock washer structure.

Fig. 4 is a schematic view of a fulcrum pin structure.

Fig. 5 is a schematic view of a card slot structure.

In the figure, the brake shoe comprises a stop sheet 1, a stop sheet 2, a support pin 21, a clamping groove 3, an embedded locking washer 4, a fastening bolt 5, a brake shoe 6 and a brake bottom plate.

Detailed Description

In order to make the technical solutions in the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

As shown in fig. 1 and 2, the drum brake shoe support pin locking structure comprises a support pin 2, a blocking piece 1, a fastening bolt 4 and a locking washer, wherein the support pin 2 penetrates through a brake bottom plate 6 and a brake shoe 5, the blocking piece 1 is installed on the brake bottom plate 6, a clamping groove 21 is formed in the support pin 2, and the blocking piece 1 is embedded in the clamping groove 21; the locking washer is an embedded locking washer 3, one surface of the locking washer is in contact with the fastening bolt 4, and the other surface of the locking washer is in contact with the baffle plate 1.

Preferably, two support pins 2 are provided, and the two support pins 2 are respectively provided on both sides of the baffle plate 1. The locking groove 21 of the support pin 2 is arranged towards the fastening bolt 4. The inner side surface of the clamping groove 21 is flush with the baffle plate 1.

Furthermore, a threaded hole matched with the position of the brake bottom plate 6 is formed in the baffle plate 1, and the fastening bolt 4 is installed on the brake bottom plate 6 through the threaded hole.

The locking washer is composed of two gaskets, the outer sides of the gaskets are provided with radial teeth, the inner sides of the gaskets are provided with large oblique teeth, the inner sides of the two gaskets are opposite, and the outer sides of the gaskets are respectively meshed with the single piece and the fastening bolt 4. In the use process, when the support pin 2 and the baffle plate 1 have a loosening trend due to frequent braking and vibration, the two end faces of the embedded locking washer 3 are respectively occluded with the baffle plate 1 and the fastening bolt 4, and relative rotation cannot occur.

At this time, only the inner oblique teeth of the two gaskets are allowed to relatively dislocate between the inner oblique tooth surfaces of the embedded locking washer 3 to generate lifting tension, so that the locking effect is realized, and the brake failure caused by the loosening of the fastening bolt 4 is effectively reduced.

The utility model discloses the installation as follows:

two branch pins 2 pass through a brake bottom plate 6 and a brake shoe 5 respectively, clamping grooves 21 of the branch pins 2 face to the direction of the fastening bolt 4, and the inner side surfaces of the clamping grooves 21 of the branch pins 2 are flush with an upper blocking piece 1 of the brake bottom plate 6. The baffle plate 1 is clamped on the clamping grooves 21 of the two support pins 2, the hole position on the baffle plate 1 is aligned with the threaded hole on the brake bottom plate 6, then the embedded lock washer 3 and the fastening bolt 4 are placed, and the fastening bolt 4 is screwed according to the specified tightening torque.

This scheme can effectively prevent because of 4 not hard up of fulcrum pin separation blade fastening bolt that vibration and frequent braking arouse, and the pretightning force loss that the compensation leads to because plastic deformation or fastener inner structure are lax exists simultaneously can used repeatedly, the equipment with dismantle simple fast, also can effectively improve separation blade 1 and fastening bolt 4's life, effectively reduces because of the stopper trouble that fulcrum pin separation blade fastening bolt 4 pine takes off and leads to.

It will be understood that when an element or layer is referred to as being "on," connected to, "or" coupled to "another element or layer, it can be directly on, connected or coupled to the other element or layer, and intervening elements or layers may also be present. In contrast, when an element is referred to as being "directly on," "directly connected to" or "directly coupled to" another element or layer, there are no intervening elements or layers present. Like numbers refer to like elements throughout. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Spatially relative terms, such as "under", "below", "lower", "over", "above", and the like, as may be used herein for ease of description, may be used to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative terms used herein should be interpreted accordingly.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the description in this document. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a drum brake shoe round pin locking structure which characterized in that: comprises a support pin (2), a baffle plate (1), a fastening bolt (4) and a lock washer,

the support pin (2) penetrates through the brake bottom plate (6) and the brake shoe (5), a blocking piece (1) is installed on the brake bottom plate (6), a clamping groove (21) is formed in the support pin (2), and the blocking piece (1) is embedded with the clamping groove (21);

the locking washer is an embedded locking washer (3), one surface of the locking washer is in contact with the fastening bolt (4), and the other surface of the locking washer is in contact with the blocking piece (1).

2. The drum brake shoe anchor pin locking arrangement of claim 1, wherein: the stop piece (1) is provided with a threaded hole matched with the position of the brake bottom plate (6), and the fastening bolt (4) is installed on the brake bottom plate (6) through the threaded hole.

3. The drum brake shoe anchor pin locking arrangement of claim 1, wherein: the number of the support pins (2) is two, and the two support pins (2) are respectively arranged on two sides of the separation blade (1).

4. The drum brake shoe anchor pin locking arrangement of claim 3, wherein: the clamping groove (21) of the support pin (2) is arranged towards the fastening bolt (4).

5. The drum brake shoe anchor pin locking arrangement of claim 1, wherein: the inner side surface of the clamping groove (21) is flush with the blocking piece (1).

6. A drum brake shoe anchor pin locking arrangement as claimed in any one of claims 1 to 5, wherein: the locking washer is composed of two gaskets, the outer sides of the gaskets are provided with radial teeth, the inner sides of the gaskets are provided with large oblique teeth, the inner sides of the two gaskets are opposite, and the outer sides of the gaskets are respectively meshed with the single piece and the fastening bolt (4).