EPB caliper structure with through hole

Abstract

The utility model relates to an EPB caliper structure with a through hole, which is arranged in a vertical line and sequentially comprises a pouring cup and a first cross gate from top to bottom, the pouring cup is positioned in the center of the first cross gate, two ends of the first cross gate are respectively provided with a straight gate, and the middle and the bottom of the straight gate are respectively provided with a second cross gate. Each second cross gate extends towards the center line and is provided with a first riser, the side, facing the center line, of each first riser is connected with an EPB caliper body mold, a through hole is formed in the bottom face of a cylinder hole of each EPB caliper body mold, a sand core is arranged in the cylinder hole, a boss matched with the through hole is arranged at the bottom of the sand core, and the boss penetrates out of the through hole; according to the EPB caliper body casting, the through hole structure is arranged at the lining hole of each EPB caliper body casting, the EPB structure is directionally solidified and is earlier than the whole casting in the solidification process of the casting, it is guaranteed that the lining hole of the EPB structure is free of shrinkage porosity, batch production can be achieved, the quality stability of the casting is improved, and various follow-up risks are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of casting, in particular to a structure of an EPB caliper with through holes. Background Art

[0002] EPB, i.e., an electronic parking brake system, is an electronically controlled automatic parking brake system that realizes the parking function by electronically controlling the vehicle's brake. Compared with the traditional handbrake, EPB has the advantages of convenient operation, accurate braking force distribution, automatic release, etc., and has gradually become a common parking brake system on modern vehicles.

[0003] The structure of the EPB caliper body is relatively thick and large compared with the hydraulic area structure of the traditional caliper. Therefore, there is an isolated liquid phase area in the solidification process of the EPB caliper body casting; although cooling fins can increase the local cooling area of the casting and change the solidification mode of the casting, it cannot completely solve the shrinkage porosity of the entire EPB structure, and the shrinkage porosity near the bushing hole will cause oil leakage alarm of the EPB structure, and in severe cases, it will lead to brake failure. Summary of the Invention

[0004] The purpose of the utility model is to solve the problems existing in the above-mentioned prior art, and provide a structure of an EPB caliper with through holes.

[0005] The specific scheme of the utility model is: a structure of an EPB caliper with through holes, which is arranged vertically and sequentially includes a pouring cup, a first cross runner from top to bottom. The pouring cup is located at the center of the first cross runner. A sprue is provided at each end of the first cross runner. A second cross runner is provided in the middle and at the bottom of each sprue. Each second cross runner extends towards the center line and is provided with a first riser. One side of the first riser facing the center line is connected with an EPB caliper body mold. A through hole is provided at the bottom surface of the cylinder hole of each EPB caliper body mold. A core is installed in the cylinder hole. A boss matching the through hole is provided at the bottom of the core, and the boss penetrates out of the through hole.

[0006] Further, a second riser is provided between two EPB caliper body molds in each horizontal row, and the two EPB caliper body molds share a second riser.

[0007] Further, the diameter of the through hole is 8 - 12 mm, and the length of the through hole is 18 - 20 mm.

[0008] Further, a margin is provided between the first cross runner and the two sprues, and a margin is provided between each sprue and the second cross runner.

[0009] Further, both the first riser and the second riser are cylindrical, the axis of the riser is parallel to the center line, and a riser neck is provided between the first riser and the second riser and the adjacent EPB caliper body mold.

[0010] The utility model has the following advantages compared with the prior art: Each EPB caliper body casting is provided with a through-hole structure at the bushing hole, enabling the EPB structure to solidify directionally during the solidification process of the casting and earlier than the overall solidification of the casting, ensuring that there is no shrinkage porosity in the bushing hole of the EPB structure, enabling mass production, improving the quality stability of the casting, and avoiding various subsequent risks. Description of the Drawings

[0011] Figure 1 is a three-dimensional structural schematic diagram of the utility model;

[0012] Figure 2 is the front view of the utility model;

[0013] Figure 3 is Figure 2 the A-A view of

[0014] Figure 4 is a three-dimensional schematic diagram of the EPB caliper body structure of the utility model;

[0015] Figure 5 is a three-dimensional schematic diagram of the core of the utility model;

[0016] In the figure: 1, pouring cup; 2, first cross-riser; 3, sprue; 4, second cross-riser; 5, first riser; 6, second riser; 7, EPB caliper body mold; 71, through-hole; 8, core; 81, boss. Detailed Embodiment

[0017] Refer to Figures 1-5 , this embodiment is an EPB caliper with a through-hole structure, arranged vertically, and sequentially includes a pouring cup 1 and a first cross-riser 2 from top to bottom. The pouring cup 1 is located at the center of the first cross-riser 2. Each end of the first cross-riser 2 is provided with a sprue 3. The middle and bottom of each sprue 3 are provided with a second cross-riser 4. Each second cross-riser 4 extends towards the center line and is provided with a first riser 5. One side of the first riser 5 facing the center line is connected with an EPB caliper body mold 7. A through-hole 71 is provided at the bottom surface of the cylinder hole of each EPB caliper body mold 7. A core 8 is installed in the cylinder hole. A boss 81 matching the through-hole 71 is provided at the bottom of the core 8, and the boss 81 passes through the through-hole 71.

[0018] Furthermore, a second riser 6 is provided between two EPB caliper body molds 7 in each horizontal row, and two EPB caliper body molds 7 share one second riser 6. Further, the diameter of the through-hole is 8 - 12 mm, and the length of the through-hole is 18 - 20 mm.

[0019] Furthermore, a hemming is provided between the first cross-riser 2 and the two sprues 3, and a hemming is provided between each sprue 3 and the second cross-riser 4.

[0020] Further, both the first riser 5 and the second riser 6 are cylindrical, the axis of the riser is parallel to the center line, and a riser neck is provided between the first riser 5 and the second riser 6 and the adjacent EPB caliper body mold 7.

[0021] The bottom surface of the cylinder hole of each EPB caliper body casting is a through-hole structure, which enables the EPB structure to solidify directionally and earlier than the overall solidification of the casting during the solidification process of the casting, ensuring that there is no shrinkage porosity in the bushing hole, realizing mass production, improving the quality stability of the casting, and avoiding various subsequent risks.

[0022] The EPB caliper body of the present utility model uses a through-hole structure instead of chill, and only needs to grind off the flash subsequently, improving production efficiency. Since the bottom surface of the EPB caliper body made by the present utility model has a through-hole, if there is no through-hole during inspection, it is regarded as a defective product, improving the efficiency of workers in inspecting products.

Claims

1. An EPB caliper with a through-hole structure, characterized in that: It is arranged in a vertical line and successively includes a sprue cup, a first runner from top to bottom. The sprue cup is located at the center of the first runner. A sprue is provided at each end of the first runner. A second runner is provided at the middle and bottom of each sprue. Each second runner extends towards the center line and is provided with a first riser. A side of the first riser facing the center line is connected with an EPB caliper body mold. A through hole is provided at the bottom surface of the cylinder hole of each EPB caliper body mold. A core is installed in the cylinder hole. A convex platform matching the through hole is provided at the bottom of the core, and the convex platform penetrates out of the through hole.

2. The EPB caliper with a through-hole structure according to claim 1, characterized in that: A second riser is provided between two EPB caliper body molds in each horizontal row, and two EPB caliper body molds share one second riser.

3. An EPB caliper with a through-hole structure according to claim 1, characterized in that: The diameter of the through hole is 8 - 12 mm, and the length of the through hole is 18 - 20 mm.

4. The EPB caliper with a through-hole structure according to claim 1, characterized in that: A chaplet is provided between the first runner and the two sprues, and a chaplet is provided between each sprue and the second runner.

5. The EPB caliper with a through-hole structure according to claim 1, characterized in that: Both the first riser and the second riser are cylindrical. The axis of the riser is parallel to the center line. A riser neck is provided between the first riser and the second riser and the adjacent EPB caliper body mold.

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