Low-dragging fixing clamp assembly

Abstract

The utility model discloses a low dragging fixing clamp assembly. Comprising an inner side caliper body, an inner side brake block, an outer side brake block, an outer side caliper body and a piston. The inner side clamp body and the outer side clamp body are connected through a bolt, and pistons are arranged in cylinder holes of the inner side clamp body and the outer side clamp body; the two ends of the inner side brake block and the two ends of the outer side brake block are elastically installed on the inner side caliper body and the outer side caliper body respectively through clamping springs, the inner side brake block and the outer side brake block are connected through a guide pin to axially move in the same direction, and the top of the inner side brake block and the top of the outer side brake block are further elastically connected through a compression spring. According to the utility model, the piston can return under the action of the sealing ring in the caliper body after the brake is released, and the brake block is far away from the brake disc under the action of the return force of the clamp spring pin and the rotating force of the brake disc, so that the effect of reducing and eliminating the dragging force is achieved.

Description

Technical Field

[0001] The utility model relates to a low-drag fixed caliper assembly used in the field of brake calipers, specifically to a fixed caliper assembly equipped with a retaining spring with a return function, which is suitable for the brake systems of traditional fuel vehicles and new energy vehicles. Background Art

[0002] With the rapid development of automobiles, safety and performance have reached a high level. Consumers are increasingly focused on energy conservation, environmental protection, and comfort, especially with new energy vehicles, which place a premium on range. The development of a low-drag fixed clamp assembly is a key means of achieving low fuel consumption and long driving range, and is crucial for improving vehicle performance. Reducing wheel drag torque by 1 Nm can increase passenger car range by 2.8%. Based on China's current vehicle ownership, reducing drag torque can effectively reduce exhaust emissions.

[0003] To improve the drag torque performance of fixed clamps, the existing technology lacks a practical and effective solution. Utility Model Content

[0004] In order to achieve the optimization points existing in the background technology, the present invention discloses a low-drag fixed clamp assembly, which can effectively reduce the drag torque of the fixed clamp assembly while taking into account the improvement of comfort.

[0005] The technical solutions adopted in this utility model are as follows:

[0006] The utility model includes an inner caliper body, an inner brake pad, an outer brake pad, an outer caliper body and a piston; the inner caliper body and the outer caliper body are connected by bolts, and pistons are installed in the cylinder holes of the inner caliper body and the outer caliper body; the utility model also includes a retaining spring, a compression spring and a guide pin, and the two ends of the inner brake pad and the outer brake pad are elastically installed on the inner caliper body and the outer caliper body respectively through the retaining spring, the inner brake pad and the outer brake pad are connected by the guide pin to form axial movement in the same direction, and the tops of the inner brake pad and the outer brake pad are also elastically connected by the compression spring.

[0007] The piston is assembled in the sealing groove of the cylinder hole of the inner caliper body / outer caliper body through a sealing ring, so that the piston and the cylinder hole of the inner caliper body / outer caliper body are sealed and connected.

[0008] The retaining spring is provided with a retaining spring limit point and a retaining spring pin. The retaining spring limit point is cooperatively connected with the lug provided at the end of the inner brake block / outer brake block. The retaining spring pin is clamped with the side wall of the inner caliper body / outer caliper body so that the retaining spring is elastically clamped in the inner caliper body / outer caliper body.

[0009] The retaining spring is W-shaped as a whole, and the W-shape is bent at a right angle to form two grooves. Each groove of the retaining spring is fixed with an extension portion on the side close to the piston. The extension portion first extends toward the piston and then bends in the opposite direction and is arranged in a U shape. The lugs arranged at the ends of the inner brake block / outer brake block are clamped in the concave space of the U shape of the retaining spring.

[0010] The inner brake block and the outer brake block are both provided with two lugs, which are respectively clamped in two W-shaped grooves of the retaining spring.

[0011] The groove walls on both sides of the two grooves of the retaining spring are provided with outward-turned protrusions as pins, and the pins are used to actively return the inner brake block / outer brake block to its original position when the brake is released.

[0012] The pins are all outward-inclined flange structures. During the installation of the brake block, the pins are pressed against the inside. After the brake block is in place, the pin hooks are caught on the plane of the inner brake block / outer brake block.

[0013] Beneficial effects of the utility model:

[0014] This utility model uses a retaining spring with a return function to actively pull the brake pad back away from the brake disc after the brake is released. The retaining spring is designed with two outward-angled pins, one above and one below, that hook onto the brake pad. This has the following advantages: increased pullback force; balanced force on both sides stabilizes the brake pad's position; and the outward-angled pins provide a cushion for the brake pad, effectively suppressing noise.

[0015] The surface of the retaining spring in the utility model is coated with PTFE coating to reduce the sliding resistance of the brake block;

[0016] The utility model is designed with four grooves on the inner and outer sides of the caliper body for limiting the brake block, which can ensure that the brake block has a stable posture and slides smoothly; and each brake block is designed with four bosses with small grooves, which is convenient for assembly and the posture of the parts is stable after assembly.

[0017] The advantages of the utility model are that the product is easy to assemble, the drag performance and comfort are improved, and the drag torque and abnormal noise are significantly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the present utility model, the following is a brief introduction to the drawings required for implementation. The drawings are as follows:

[0019] Figure 1 This is a schematic diagram of the overall structure of the fixed clamp assembly of the utility model;

[0020] Figure 2 This is a schematic diagram of the assembly state of the fixed caliper brake block and the circlip of the utility model;

[0021] Figure 3 This is a schematic diagram of the assembly state of the retaining clamp spring of the utility model;

[0022] Figure 4 It is a schematic diagram of the circlip;

[0023] Figure 5 It is a schematic diagram of the brake pad;

[0024] Figure 6 This is a schematic diagram of the matching state of the brake block and the circlip;

[0025] Figure 7 It is a schematic diagram of the principle of optimizing the performance of the fixing clamp by applying pressure by the compression spring 4.

[0026] In the figure: inner caliper body (1), inner brake block (2), retaining spring (3), compression spring (4), outer brake block (5), outer caliper body (6), piston (7), bleed screw (8), bolt (9), mounting hole bushing (10), guide pin (11), sealing ring (12), retaining spring limit point (13), retaining spring pin (14). DETAILED DESCRIPTION

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0028] like Figure 1 As shown, the specific implementation includes an inner caliper body 1, an inner brake pad 2, a retaining spring 3, a compression spring 4, an outer brake pad 5, an outer caliper body 6 and a piston 7; the inner caliper body 1 and the outer caliper body 6 are connected by a bolt 9, and a mounting hole bushing 10 is provided at the outer end of the bolt 9. Pistons 7 are installed in the cylinder holes of the inner caliper body 1 and the outer caliper body 6, and a brake disc is provided between the inner caliper body 1 and the outer caliper body 6.

[0029] like Figure 2 and Figure 3 As shown, the inner brake pad 2 and the outer brake pad 5 are respectively mounted in the inner caliper body 1 and the outer caliper body 6. The ends of the inner brake pad 2 and the outer brake pad 5 are elastically returnably mounted in the inner caliper body 1 and the outer caliper body 6 respectively by means of a retaining spring 3, so that the inner brake pad 2 and the outer brake pad 5 are arranged opposite each other on either side of the brake disc. The inner brake pad 2 is located between the brake disc and the cylinder hole and piston 7 of the inner caliper body 1, and the outer brake pad 5 is located between the brake disc and the cylinder hole and piston 7 of the outer caliper body 6. The inner brake pad 2 and the outer brake pad 5 are connected by a guide pin 11 to form axial movement in the same direction. The tops of the inner brake pad 2 and the outer brake pad 5 are also elastically connected by a compression spring 4. Specifically, a total of four retaining springs 3 are respectively mounted in the inner caliper body 1 and the outer caliper body 6. The inner brake pad 2 and the outer brake pad 5 are respectively mounted between the four retaining springs 3 and fixed by the guide pin 11 and the compression spring 4.

[0030] like Figure 6As shown, the piston 7 is assembled in the sealing groove of the cylinder hole of the inner caliper body 1 / outer caliper body 6 through the sealing ring 12, and the piston 7 and the sealing ring 12 are assembled in the cylinder holes of the inner caliper body 1 and the outer caliper body 6, so that the piston 7 and the cylinder holes of the inner caliper body 1 / outer caliper body 6 are sealed and connected.

[0031] like Figure 4 As shown, the retaining spring 3 is provided with a retaining spring limit point 13 and a retaining spring pin 14. The retaining spring limit point 13 and the lug provided at the end of the inner brake block 2 / outer brake block 5 are cooperatively connected. The retaining spring pin 14 and the side wall of the inner caliper body 1 / outer caliper body 6 are clamped so that the retaining spring 3 is elastically clamped in the inner caliper body 1 / outer caliper body 6.

[0032] like Figure 3 and Figure 6 As shown, the retaining spring 3 is approximately W-shaped as a whole. The W-shape is equipped with four limit points that are clamped in the corresponding grooves of the inner caliper body 1 / outer caliper body 6. The W-shape is bent at multiple right angles to form two grooves. Each groove of the retaining spring 3 is fixed with an extension on one side close to the piston 7. The extension first extends toward the piston 7 and then bends in the opposite direction and is set in a U-shape. The concave and convex directions of the U-shape and the groove are the same, that is, concave in the same direction; the lugs set at the ends of the inner brake block 2 / outer brake block 5 are clamped in the concave space of the U-shape of the retaining spring 3.

[0033] like Figure 5 As shown, the inner brake pad 2 and the outer brake pad 5 are different from conventional brake pads. Both have two lugs, which are respectively clamped in the two W-shaped grooves of the retaining spring 3. The middle groove of the limit boss of the brake pad 2 / 5 is angled for easy assembly.

[0034] The groove walls on both sides of the two grooves of the retaining spring 3 are provided with outward-turned protrusions as pins 14. The pins 14 are used to actively return the inner brake block 2 / outer brake block 5 to their original positions when the brake is released.

[0035] like Figure 4 As shown, both pins 14 have outward-angled flanges. During the installation of the brake pads 2 / 5, the pins 14 face inward. Once the brake pads 2 / 5 are in place, the claws of the pins 14 grip the flat surfaces of the inner brake pad 2 / outer brake pad 5. During braking, the brake pads 2 / 5 are pushed toward the brake disc, causing the claws of the pins 14 to deform and generate a pullback force.

[0036] The working principle of this utility model is that the fixed caliper assembly, under the action of hydraulic pressure, pushes out the inner and outer pistons. The brake pads, pushed by the pistons, clamp the brake disc, thus achieving the braking function. After the pressure is relieved, the piston pressure drops sharply, and the brake is released. After the brake is released, the brake pads and the brake disc still have a release point, which creates a drag force that hinders the rotation of the brake disc.

[0037] The structure of this utility model optimizes the performance of the fixed caliper. On the one hand, the active return function of the compression spring 4 and the retaining spring 3 fully utilizes the disc gap to keep the brake pad away from the brake disc, effectively reducing the drag torque and forming a low drag; on the other hand, the camber angle of the pin 14 suppresses the generation of rattle sound, which helps to reduce the occurrence rate of brake noise; on the other hand, the force value of the two retaining spring pins 14 is reasonably distributed. Figure 7 Compression spring 4 generates a diagonally downward force F1, which is broken down into a downward force component F1z and a leftward force component F1x. Under the action of F1 alone, the upper edge of the brake pad 2 / 5 moves away from the brake disc, increasing the amount of friction between the lower side and the brake disc, leading to uneven wear of the brake pad. The presence of retaining spring 3, however, generates forces F2 and F3 in the x-direction, respectively, on the middle and lower portions of the brake pad, pushing them away from the brake disc. The combined action of F1x, F2, and F3 helps maintain the brake pad's posture and prevents uneven wear of the friction material.

[0038] Therefore, the utility model can realize that after the brake is released, the piston retreats under the action of the sealing ring inside the caliper body, and the brake block moves away from the brake disc under the action of the return force of the retaining spring pin and the rotational force of the brake disc, thereby achieving the effect of reducing and eliminating the drag force.

Claims

1. A low-drag fixed caliper assembly, comprising an inner caliper body (1), an inner brake pad (2), an outer brake pad (5), an outer caliper body (6), and a piston (7); the inner caliper body (1) and the outer caliper body (6) are connected by bolts (9), and pistons (7) are installed in the cylinder holes of the inner caliper body (1) and the outer caliper body (6); characterized in that: It also includes a retaining spring (3), a compression spring (4) and a guide pin (11). The inner brake block (2) and the outer brake block (5) are elastically mounted on the inner caliper body (1) and the outer caliper body (6) at both ends through a retaining spring (3). The inner brake block (2) and the outer brake block (5) are connected by a guide pin (11) to form axial movement in the same direction. The tops of the inner brake block (2) and the outer brake block (5) are also elastically connected by a compression spring (4).

2. The low-drag fixed clamp assembly according to claim 1, characterized in that: The piston (7) is assembled in the sealing groove of the cylinder hole of the inner caliper body (1) / outer caliper body (6) through a sealing ring (12), so that the piston (7) and the cylinder hole of the inner caliper body (1) / outer caliper body (6) are sealed.

3. The low-drag fixed clamp assembly according to claim 1, characterized in that: The retaining spring (3) is provided with a retaining spring limiting point (13) and a retaining spring pin (14); the retaining spring limiting point (13) and a lug provided at the end of the inner brake block (2) / outer brake block (5) are cooperatively connected; the retaining spring pin (14) and the side wall of the inner caliper body (1) / outer caliper body (6) are clamped together so that the retaining spring (3) is elastically clamped in the inner caliper body (1) / outer caliper body (6).

4. The low-drag fixed clamp assembly according to claim 3, characterized in that: The clamping spring (3) is W-shaped as a whole, and the W-shape is bent at a right angle to form two grooves. Each groove of the clamping spring (3) is fixed with an extension portion on one side close to the piston (7). The extension portion first extends toward the piston (7) and then bends in the opposite direction and is arranged in a U shape. The lugs arranged at the ends of the inner brake block (2) / outer brake block (5) are clamped in the concave space of the U shape of the clamping spring (3).

5. The low-drag fixing clamp assembly according to claim 3, characterized in that: The inner brake block (2) and the outer brake block (5) are both provided with two lugs, and the two lugs are respectively clamped in the two W-shaped grooves of the retaining spring (3).

6. The low-drag fixed clamp assembly according to claim 4, characterized in that: The groove walls on both sides of the two grooves of the clamping spring (3) are both provided with outward-turned protrusions as pins (14). The pins (14) are used to actively return the inner brake block (2) / outer brake block (5) to their original positions when the brake is released.

7. The low-drag fixing clamp assembly according to claim 6, characterized in that: The pins (14) are all outward-inclined flange structures. During the process of installing the brake block (2 / 5), the pins (14) are pressed against the inner side. After the brake block (2 / 5) is in place, the pins (14) hook on the inner brake block (2) / outer brake block (5) plane.

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