Cast steel backing structure for brake pad

Abstract

The utility model provides a cast steel backing structure for a brake pad, which belongs to the technical field of automobile parts and comprises a backing plate and a groove arranged on one side surface of the backing plate, and further comprises a plurality of reinforcing ribs laid on one side surface of the backing plate, the reinforcing ribs are positioned in the groove, and two ends of each reinforcing rib are connected with the side wall of the groove; the reinforcing ribs are additionally arranged in the back plate, so that the shearing strength between the back plate and the friction block is increased, the friction block is effectively prevented from falling off, and the driving safety is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile parts, and specifically relates to a cast steel back structure for brake pad. BACKGROUND

[0002] In the automobile braking system, the brake pad as the core safety component, its performance directly determines the braking efficiency and driving safety of the vehicle. The traditional brake pad steel back usually adopts hot pressing process and friction block compound forming, but its structure design and material application has the following technical bottlenecks:

[0003] The traditional steel back adopts single cast nail or simple protruding structure and connects with the friction block, lacks systematic strengthening design. The contact area of this structure and friction material is limited, and the cast nail is scattered, which causes the friction block to fall off due to shear stress concentration in the braking process. Especially under high temperature or high load working condition, the interface is easy to cause delamination failure due to uneven stress distribution, which significantly increases the risk of brake failure. SUMMARY

[0004] Therefore, the utility model provides a cast steel back structure for brake pad, which can increase the shear strength between the back plate and the friction block by adding reinforcing ribs in the back plate, effectively prevent the friction block from falling off and improve driving safety.

[0005] To solve the above technical problems, the utility model provides a cast steel back structure for brake pad, which comprises a back plate and a groove formed on one side of the back plate, and further comprises a plurality of reinforcing ribs laid on one side of the back plate, the reinforcing ribs are located in the groove, and the two ends of each reinforcing rib are connected with the side wall of the groove. The reinforcing ribs can increase the connection strength between the back plate and the friction block.

[0006] The reinforcing ribs comprise a plurality of first reinforcing ribs laid on the back plate, the first reinforcing ribs have an arc-shaped structure and are located at the same center as the brake disc.

[0007] The first reinforcing ribs are provided in plurality and have the same spacing between every two adjacent first reinforcing ribs, and the plurality of first reinforcing ribs are located at the same center and have a target ring-shaped structure.

[0008] The reinforcing ribs comprise a plurality of second reinforcing ribs laid on the back plate, and the plurality of second reinforcing ribs are arranged in a linear array.

[0009] The reinforcing ribs further comprise a plurality of second reinforcing ribs laid on the back plate, each second reinforcing rib is arranged interlaced with the first reinforcing rib, and the first reinforcing rib and the second reinforcing rib can further improve the shear strength between the back plate and the friction block.

[0010] The back plate comprises a base plate, a ring rib is arranged on one side of the base plate, the ring rib forms a groove on the base plate, and the thickness of the reinforcing rib is between one third and one fourth of the thickness of the back plate.

[0011] A plurality of protruding blocks are further arranged on the reinforcing rib, and the protruding blocks and the reinforcing rib are matched with each other to further improve the connection strength between the back plate and the friction block.

[0012] The protruding blocks are square frame structures, which further increase the friction surface between the friction block and the back plate.

[0013] The reinforcing rib further comprises a plurality of second reinforcing ribs arranged on the back plate, each second reinforcing rib is arranged in an interlaced manner with the first reinforcing rib, and each protruding block is located at an intersection of the first reinforcing rib and the second reinforcing rib.

[0014] The back plate is made of nodular cast iron material, which can reduce the weight of the back plate and enable the back plate to withstand greater yield force.

[0015] In summary, compared with the prior art, the present application has at least one of the following beneficial technical effects:

[0016] 1. The shear strength is significantly improved, and the braking safety is significantly enhanced:

[0017] Multi-directional reinforcing rib synergistic effect: through the interlaced grid design of the arc-shaped first reinforcing rib and the linear array second reinforcing rib, the contact area between the friction block and the steel back is increased by more than 40%. The measured shear strength is greater than 8 MPa, which is three times the national standard GB5763 requirement of 2.5 MPa standard, effectively resisting the shear stress generated during braking and reducing the risk of friction block falling off.

[0018] Intersection protruding block strengthening: square frame protruding blocks are arranged at the intersection of the reinforcing ribs to form a mechanical locking structure, so that the bonding strength between the friction block and the steel back is improved by 25%. Through bench test verification, the friction block remains intact without peeling after 5000 times of emergency braking cycles.

[0019] 2. Structural rigidity optimization, anti-deformation ability leapfrog improvement:

[0020] Topology optimization design: the first reinforcing rib is arranged along the concentric arc of the brake disc, and the second reinforcing rib is arranged in a linear array, forming a dual-axial stress conduction channel.

[0021] Nodular cast iron material empowerment: by using the high yield strength characteristics (up to 600 MPa) of nodular cast iron, the steel back can withstand 2 times the piston thrust of the calliper.

[0022] 3. Lightweight and strength balance, multi-dimensional improvement of vehicle performance:

[0023] Material-structure synergistic weight reduction: adopt nodular cast iron to replace traditional steel back material, combined with stiffener topology optimization, realize single piece weight reduction of 28%. According to the annual output of 10 million sets, about 1200 tons of carbon dioxide emissions can be reduced per year.

[0024] Thermal management performance improvement: the thermal conductivity of nodular cast iron reaches 50W / m·K, and the heat dissipation channel formed by the grid-shaped stiffener makes the working surface temperature reduce by 20-25℃ under continuous braking condition, effectively delays the thermal decay phenomenon.

[0025] 4. Durability and NVH performance are comprehensively optimized:

[0026] Fatigue life extension: nodular cast iron matrix organization refinement treatment (grain size ASTM 7 level) combined with isothermal quenching process, makes the fatigue life of steel back reach 420,000 times, which is 68% higher than that of traditional structure.

[0027] Vibration noise suppression: high damping characteristics combined with convex block friction surface design, makes the brake noise reduce by 14%, improves the driving comfort. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 The utility model relates to a cast steel back structure for brake pad structure schematic view.

[0029] Mark explanation:

[0030] 100, back plate; 101, base plate; 102, ring muscle; 103, groove;

[0031] 200, first stiffener;

[0032] 300, second stiffener;

[0033] 400, convex block. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantage of the embodiments of the utility model more clear, the following will combine the drawings of the embodiments of the utility model with the specific implementation of the embodiments of the utility model. Figure 1 The technical scheme of the embodiments of the utility model is described clearly and completely. Obviously, the described embodiments are part of the embodiments of the utility model, not all the embodiments. Based on the described embodiments of the utility model, all other embodiments obtained by those skilled in the art belong to the scope of the utility model protection.

[0035] Embodiment one;

[0036] The utility model provides a cast steel back structure for brake pad, including backplate 100 and the recess 103 of setting up on one side surface of backplate 100, still be equipped with a plurality of first reinforcing rib 200 on backplate 100, a plurality of first reinforcing rib 200 are located in recess 103, and the both ends of every first reinforcing rib 200 are connected with the lateral wall of recess 103, and every first reinforcing rib 200 is arc structure, and every first reinforcing rib 200 is located with brake disc same center of circle, and the interval between every two adjacent first reinforcing rib 200 is same, thereby through a plurality of first reinforcing rib 200 can increase the contact area between friction block and backplate 100, and then increase the shearing strength between backplate 100 and friction block.

[0037] Further, the first reinforcing rib 200 is also provided with a plurality of protruding blocks 400, that is, the protruding block 400 and the first reinforcing rib 200 cooperate to further increase the contact area of the backplate 100 and the contact surface, and each protruding block 400 is a square frame structure, which can further enhance the shearing strength between the backplate 100 and the friction block.

[0038] Specifically, the backplate 100 is integrally formed by spherulitic cast iron material, and the thickness is 8mm. The backplate 100 is composed of a base plate 101 and a ring rib 102 arranged on the side surface of the base plate 101. The ring rib 102 and the base plate 101 form a recess 103. The thickness of the base plate 101 is 6mm, and the thickness of the ring rib 102 is 2mm. The thickness of the first reinforcing rib 200 is between one-third and one-fourth of the thickness of the backplate 100, that is, the reinforcing rib does not exceed the recess 103, and the thickness of the protruding block 400 does not exceed 2mm.

[0039] Example two;

[0040] The difference from example one is that the reinforcing ribs arranged on the backplate 100 are a plurality of second reinforcing ribs 300, and the plurality of second reinforcing ribs 300 are arranged in a linear array. The both ends of each second reinforcing rib 300 are connected with the side wall of the recess 103. The plurality of protruding blocks 400 are arranged on the second reinforcing rib 300, and the thickness of the second reinforcing rib 300 is consistent with the thickness of the first reinforcing rib 200.

[0041] Example three;

[0042] The difference from example one is that a plurality of second reinforcing ribs 300 are arranged on the basis of the plurality of first reinforcing ribs 200, and the plurality of second reinforcing ribs 300 are arranged in a staggered manner with the first reinforcing ribs 200. The thickness of the first reinforcing rib 200 is consistent with the thickness of the second reinforcing rib 300, and each protruding block 400 is located at the intersection of the first reinforcing rib 200 and the second reinforcing rib 300.

[0043] Also, the first and second reinforcing ribs in embodiments one to four can have a trapezoidal, rectangular or triangular cross-sectional shape.

[0044] In addition, it should be further noted that, in the description of the present application, unless otherwise expressly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium, or can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0045] The above is the preferred embodiment of the present application, it should be pointed out that, for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A cast steel backing structure for brake pads, comprising a back plate (100) and a groove (103) formed on one side surface of the back plate (100), characterized in that: It also includes a number of reinforcing ribs laid on one side of the back plate (100), the reinforcing ribs being located in the groove (103) and both ends of each reinforcing rib being connected to the side wall of the groove (103).

2. The cast steel backing structure for brake pads as described in claim 1, characterized in that: The reinforcing ribs include a plurality of first reinforcing ribs (200) laid on the back plate (100), the first reinforcing ribs (200) having an arc-shaped structure and being located at the same center as the brake disc.

3. The cast steel backing structure for brake pads as described in claim 2, characterized in that: The first reinforcing rib (200) is provided in multiples and the spacing between any two adjacent first reinforcing ribs (200) is the same.

4. The cast steel backing structure for brake pads as described in claim 1, characterized in that: The reinforcing ribs include a plurality of second reinforcing ribs (300) laid on the back plate (100), and the plurality of second reinforcing ribs (300) are arranged in a linear array.

5. A cast steel backing structure for brake pads as described in claim 2, characterized in that: The reinforcing ribs also include a number of second reinforcing ribs (300) laid on the back plate (100), each of the second reinforcing ribs (300) being arranged alternately with the first reinforcing ribs (200).

6. A cast steel backing structure for brake pads as described in any one of claims 1-5, characterized in that: The back plate (100) includes a base plate (101), and a ring rib (102) is provided on one side of the base plate (101). The ring rib (102) forms a groove (103) on the base plate (101). The thickness of the reinforcing rib is between one-third and one-quarter of the thickness of the back plate (100).

7. A cast steel backing structure for brake pads as described in claim 6, characterized in that: The reinforcing rib is also provided with several protrusions (400).

8. The cast steel backing structure for brake pads as described in claim 7, characterized in that: The protrusion (400) has a square frame structure.

9. A cast steel backing structure for brake pads as described in claim 8, characterized in that: The reinforcing ribs also include a plurality of second reinforcing ribs (300) laid on the back plate (100), each of the second reinforcing ribs (300) being arranged alternately with the first reinforcing rib (200), and each protrusion (400) being located at the intersection of the first reinforcing rib (200) and the second reinforcing rib (300).

10. A cast steel backing structure for brake pads as described in claim 1, characterized in that: The back plate (100) is made of ductile iron.

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