CN213921372U

CN213921372U - Drum brake wheel hub and casting part of drum brake wheel hub

Info

Publication number: CN213921372U
Application number: CN202023015276.7U
Authority: CN
Inventors: 包海珠
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-12-16
Filing date: 2020-12-16
Publication date: 2021-08-10
Anticipated expiration: 2030-12-16

Abstract

The utility model discloses a wheel hub and drum casting piece of wheel hub of stopping are stopped to drum. A drum brake hub comprises a brake bowl main body formed by casting, wherein the brake bowl main body comprises a bowl-shaped body and a wheel axle mounting part arranged at the center of the bowl-shaped body, and a metal ring for drum brake is arranged on the inner wall of the bowl-shaped body in a clinging manner; one end of the metal ring for drum braking close to the bottom of the bowl-shaped body is the lower end of the metal ring for drum braking, and the other corresponding end is the upper end of the metal ring for drum braking; the bottom of the bowl body of the bowl-shaped body is also provided with a plurality of metal ring positioning holes for inserting ejector pins of the mould, the orifice at one end of each metal ring positioning hole is positioned on the outer wall of the bottom of the bowl-shaped body, and the orifice at the other end of each metal ring positioning hole is tightly attached to the lower end of the metal ring for drum braking. The utility model provides a drum wheel hub's casting spare of stopping, includes the brake bowl main part that the casting formed, and this brake bowl main part includes bowl body and sets up the shaft installation department at bowl form body center, and the bowl body bottom of this bowl form body still is equipped with a plurality of metal loop locating holes. The utility model discloses can reduce the drum and stop wheel hub's fracture risk, prolong its life.

Description

Drum brake wheel hub and casting part of drum brake wheel hub

Technical Field

The utility model relates to a motor vehicle drum stops technical field of structure, especially a drum wheel hub of stopping and drum wheel hub's casting piece of stopping.

Background

Please refer to fig. 1, which is a schematic structural diagram of a drum brake hub of an existing electric vehicle or motorcycle. As shown in the figure: the brake bowl comprises a brake bowl main body A1 formed by aluminum or aluminum alloy in a die-casting mode, wherein the brake bowl main body A1 comprises a bowl-shaped body A11 and a wheel axle mounting part A12 which is connected and arranged at the center of the bowl-shaped body A11; the inner wall of the bowl-shaped body A11 is closely provided with a drum brake metal ring A2 (usually an iron ring), and the drum brake metal ring A2 is a regular cylinder-shaped body; the metal ring A2 for drum brake has good wear resistance and is beneficial to use. When the structure is manufactured in a die casting mode, the metal ring A2 for the drum brake is placed at the corresponding position in the die, then aluminum liquid is injected from an aluminum casting opening of the die, namely the direction M in the drawing, but in the other direction of the die, the aluminum liquid is blocked by the die to generate the recoil force in the direction N so as to push the metal ring A2 for the drum brake to shift, and then one end of the metal ring A2 for the drum brake and the part of the formed bowl-shaped body A11 generate a long weak part (such as the position C in the drawing), and the weak part C can cause the brake bowl main body A1 to break when in use, so that serious potential safety hazards and accidents are caused.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

An object of the utility model is to provide a wheel hub and the casting piece of wheel hub that stops of drum have solved the technical problem that has longer weak position in the drum stop with the metal ring and the local existence of the bowl form body after the shaping in the wheel hub's of current drum stop wheel hub's structure. The utility model discloses can avoid because of the potential safety hazard that weak position this caused, prolong the drum and stop wheel hub's life.

(II) technical scheme

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a drum brake hub comprises a brake bowl main body formed by casting, wherein the brake bowl main body comprises a bowl-shaped body and a wheel axle mounting part arranged at the center of the bowl-shaped body, and a metal ring for drum brake is tightly attached to the inner wall of the bowl-shaped body; one end of the drum brake metal ring close to the bottom of the bowl-shaped body is the lower end of the drum brake metal ring, and the other corresponding end of the drum brake metal ring is the upper end of the drum brake metal ring; the method is characterized in that: the bottom of the bowl body of the bowl-shaped body is also provided with a plurality of metal ring positioning holes for inserting ejector pins of the die, the orifice at one end of each metal ring positioning hole is positioned on the outer wall of the bottom of the bowl-shaped body, and the orifice at the other end of each metal ring positioning hole is tightly attached to the lower end of the metal ring for drum braking.

Furthermore, the plurality of metal ring positioning holes are distributed in the radial direction.

Furthermore, the axis of the metal ring positioning hole is parallel to the axis of the metal ring for drum brake.

Further, the metal ring positioning hole is a cylinder or a polygonal cylinder.

Furthermore, the hole depth of the metal ring positioning hole is larger than one half of the thickness of the bowl bottom of the bowl-shaped body.

Furthermore, the brake bowl main part periphery integrated into one piece has the spoke, the spoke outer end is connected through the connecting piece with the metal outer lane.

The utility model provides a drum wheel hub's casting spare of stopping, includes the brake bowl main part that the casting formed, the brake bowl main part includes the bowl body and sets up the wheel shaft installation department at bowl form body center, its characterized in that: the bottom of the bowl body is also provided with a plurality of metal ring positioning holes.

Furthermore, the brake bowl main part periphery integrated into one piece has the spoke.

(III) advantageous effects

Compared with the prior art, the utility model provides a wheel hub and drum wheel hub's casting piece of stopping of drum possesses following beneficial effect: the metal ring positioning hole is positioned between the lower end of the metal ring for drum braking and the surface of the outer wall of the bowl-shaped body, and the lower end of the metal ring for drum braking is relatively isolated from the surface of the outer wall of the bowl-shaped body; the wall thickness between the lower end of the metal ring for drum brake and the surface of the outer wall of the bowl-shaped body is relatively thick, so that potential safety hazards caused by existing weak parts can be avoided, and the service life of the drum brake wheel hub is prolonged.

Additionally, in the utility model discloses in bowl body bottom of bowl body is equipped with a plurality of can supply mould thimble male ferrule locating hole, realizes the location of ferrule in casting process, and these holes are left to the shaping back product simultaneously, can realize the drum and stop the outside heat dissipation at position (bowl form is internal), increase of service life.

Drawings

Fig. 1 is a schematic structural view of a conventional drum brake hub.

Fig. 2 is a schematic diagram of a half-section structure of the present invention.

Fig. 3 is an exploded perspective view of the present invention.

In the figure:

a1-brake bowl main body, A11-bowl body, A12-wheel shaft mounting part, A2-metal ring for drum brake and C-weak part;

1-a brake bowl main body, 11-a bowl body, 12-a wheel axle mounting part, 13-a spoke, a 2-drum brake metal ring, 3-a metal ring positioning hole, 4-a metal outer ring, 5-a connecting piece and 6-a mould thimble.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely 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, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 2-3, the utility model provides a drum brake wheel hub, which comprises a brake bowl main body 1 formed by casting, wherein the brake bowl main body 1 comprises a bowl-shaped body 11 and a wheel axle mounting part 12 connected and arranged at the center of the bowl-shaped body 11, and a metal ring 2 for drum brake is tightly attached to the inner wall of the bowl-shaped body 11; one end of the drum brake metal ring 2 close to the bottom of the bowl-shaped body 11 is the lower end of the drum brake metal ring, and the other corresponding end is the upper end of the drum brake metal ring; the method is characterized in that: the bottom of the bowl body 11 is also provided with a plurality of metal ring positioning holes 3 for inserting the mold thimble 6, the orifice at one end of each metal ring positioning hole 3 is positioned on the outer wall of the bottom of the bowl body 11, and the orifice at the other end is tightly attached to the lower end of the metal ring for drum braking.

Preferably, the plurality of metal ring positioning holes 3 are distributed in a radial direction.

Preferably, the axis of the ferrule positioning hole 3 is parallel to the axis of the drum brake ferrule 2.

Preferably, the ferrule positioning hole 3 is a cylinder or a polygonal cylinder.

Preferably, the hole depth of the metal ring positioning hole 3 is larger than one half of the thickness of the bowl bottom of the bowl body 11.

Preferably, the brake bowl main part 1 periphery integrated into one piece has spoke 13, spoke 13 outer end and metal outer lane 4 are connected through connecting piece 5.

The utility model provides a drum wheel hub's casting member of stopping, includes the brake bowl main part 1 that the casting formed, brake bowl main part 1 includes bowl 11 and sets up the wheel axle installation department 12 at bowl 11 center, the bowl body bottom of bowl 11 still is equipped with a plurality of metal ring locating hole 3.

Preferably, spokes 13 are integrally formed on the periphery of the brake bowl main body 1.

As shown in fig. 2, it is a schematic diagram of the half-section structure of the present invention. In this embodiment, the drum brake hub includes a brake bowl main body 1 formed by casting, and includes a bowl-shaped bowl 11, and the center of the bowl-shaped bowl 11 is a wheel axle mounting part 12; the drum brake metal ring 2 is closely arranged on the inner wall of the bowl-shaped body 11, one end of the drum brake metal ring, which is close to the bottom of the bowl-shaped body 11, is the lower end of the drum brake metal ring, and the other corresponding end of the drum brake metal ring is the upper end of the drum brake metal ring. The material of the brake bowl main body 1 is preferably a metal material (such as aluminum), and may also be a plastic material with certain strength.

In this embodiment, a plurality of metal ring positioning holes 3 (as shown in fig. 3) are disposed at the bottom of the bowl 11, the metal ring positioning holes 3 penetrate through the bottom of the bowl, the opening at one end is located on the outer wall of the bottom of the bowl 11, and the corresponding other end is closely attached to the lower end of the metal ring for drum brake.

The forming process of the ferrule positioning hole 3 in this embodiment is as follows: before injecting the aluminum liquid into the mold, uniformly fixing a plurality of mold thimbles 6 on one side of the drum brake metal ring 2 in a radial direction, wherein one ends of the mold thimbles 6 abut against the lower end of the drum brake metal ring 2, positioning the drum brake metal ring 2 at a preset position of the mold, and then injecting the aluminum liquid into an aluminum casting port of the mold, thereby playing a role in positioning the drum brake metal ring 2; when the molten aluminum is blocked by the mold to generate a recoil force towards the bottom of the bowl-shaped body 11, and the recoil force pushes the drum brake metal ring 2 to move towards the bottom of the bowl-shaped body 11, the mold thimble 6 props against the lower end of the drum brake metal ring 2, so that the drum brake metal ring 2 is prevented from moving towards the bottom of the bowl-shaped body 11; the mould thimble 6 is radial even, can promote the stability and the final effect of location. After the brake bowl main body 1 is formed, a weak part caused by recoil force cannot be generated between the lower end of the metal ring 2 for drum braking and the formed bowl-shaped body 11. As shown in fig. 2, it is a sectional structure diagram of the drum brake hub without removing the ejector pins 6 of the mold, wherein the ejector pins 6 of the mold are directly opposite to the section of the lower end of the drum brake metal ring 2, and the direction of the recoil force is just opposite, so that the influence caused by the recoil force can be better eliminated, and the positioning effect can be improved. After the mold thimble 6 is removed, a ferrule positioning hole 3 is formed at the bottom of the bowl-shaped body 11.

In view of the above, in the present embodiment, when the metal ring positioning hole 3 is formed, the mold thimble 6 directly faces the cross section of the lower end of the metal ring 2 for drum brake, and the direction of the recoil force is exactly opposite, and the mold thimble 6 is an arched column; the ferrule positioning hole 3 in this embodiment is shaped like an arched cylinder, and the axis thereof is parallel to the axis of the drum brake ferrule 2 and is located on the side of the annular section of the lower end of the drum brake ferrule 2.

The shape of the ferrule positioning hole 3 in this embodiment is not limited to the arched cylinder shown in the drawings, and it may be a cylinder or a polygonal cylinder according to the shape of the mold thimble 6; the axial lead of the column body and the axial lead of the metal ring 2 for drum brake can also be non-parallel, for example, the column body is obliquely arranged at the bottom of the bowl body, and forms an included angle with the axial lead of the metal ring 2 for drum brake.

In this embodiment, the depth of the metal ring positioning hole 3 is greater than the thickness of the bottom wall of the bowl 11, and in practice, the depth of the metal ring positioning hole 3 can be set to be greater than half of the thickness of the bowl 11, so as to ensure that the sufficient thickness exists between the lower end of the metal ring 2 for drum braking and the outer wall of the bowl 11 at the bottom of the bowl, and reduce the risk of breaking the brake bowl main body 11 during use.

In this embodiment, brake bowl main part 1 periphery integrated into one piece has spoke 13, spoke 13 outer end is connected through connecting piece 5 (preferred metalwork) with metal outer lane 4, and the dismouting is convenient.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A drum brake hub comprises a brake bowl main body (1) formed by casting, wherein the brake bowl main body (1) comprises a bowl-shaped body (11) and a wheel axle mounting part (12) arranged at the center of the bowl-shaped body (11), and a drum brake metal ring (2) is arranged on the inner wall of the bowl-shaped body (11) in an attached mode; one end of the drum brake metal ring (2) close to the bottom of the bowl-shaped body (11) is the lower end of the drum brake metal ring, and the other corresponding end of the drum brake metal ring is the upper end of the drum brake metal ring; the method is characterized in that: the bottom of the bowl body (11) is also provided with a plurality of metal ring positioning holes (3) for inserting of the mold ejector pins (6), the hole opening at one end of each metal ring positioning hole (3) is located on the outer wall of the bottom of the bowl body (11), and the hole opening at the other end is tightly attached to the lower end of the metal ring for drum braking.

2. The drum brake hub of claim 1, wherein: the plurality of metal ring positioning holes (3) are distributed in the radial direction.

3. A drum brake hub as claimed in claim 2, wherein: the axial lead of the metal ring positioning hole (3) is parallel to the axial lead of the metal ring (2) for drum brake.

4. A drum brake hub as claimed in claim 3, wherein: the metal ring positioning hole (3) is a cylinder or a polygonal cylinder.

5. A drum brake hub according to any one of claims 1 or 2 or 3 or 4, wherein: the depth of the metal ring positioning hole (3) is larger than one half of the thickness of the bowl bottom of the bowl-shaped body (11).

6. The drum brake hub of claim 5, wherein: the brake bowl is characterized in that spokes (13) are integrally formed on the periphery of the brake bowl main body (1), and the outer ends of the spokes (13) are connected with the metal outer ring (4) through connecting pieces (5).

7. The utility model provides a drum wheel hub's casting member of stopping, includes brake bowl main part (1) that the casting formed, brake bowl main part (1) includes bowl body (11) and sets up in wheel shaft installation department (12) at bowl body (11) center, its characterized in that: the bottom of the bowl body (11) is also provided with a plurality of metal ring positioning holes (3).

8. The casting of a drum brake hub as recited in claim 7, wherein: the brake bowl is characterized in that spokes (13) are integrally formed on the periphery of the brake bowl main body (1).