shaped as a band spring arranged to straddle the brake disc
By using an asymmetric strip spring design, the problem of dynamic force variation in the braking system in the prior art is solved, achieving stable axial offset and uniform wear between the brake pad and the brake disc, simplifying the assembly of the braking system and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- FRENI BREMBO SPA
- Filing Date
- 2024-10-29
- Publication Date
- 2026-07-14
AI Technical Summary
In the prior art, the positioning of the spring in a disc brake between the brake pad and the brake disc relies on friction, which is easily disturbed by external forces, leading to dynamic changes in force and affecting the normal function of the braking system. This is especially true in floating brake calipers, where it is difficult to achieve a suitable axial thrust component, and existing solutions are complex and costly.
An asymmetric band spring is used, and the asymmetric design of the reaction arm and the action arm ensures that the elastic bias pad is away from the brake disc when the braking action stops, and maintains a uniform axial load during wear. The torsion of the action arm and the holding teeth of the reaction arm limit axial movement.
It achieves axial action that ensures the brake pads are away from the brake disc when braking stops, and maintains uniform elastic action during wear, avoiding load imbalance, simplifying the assembly of the braking system and reducing costs.
Smart Images
Figure CN122396876A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a band spring for a braking device for a disc brake, a brake caliper including a caliper body, a brake pad and a band spring, and a brake caliper including a brake disc and the brake caliper. Background Technology
[0002] In disc brakes, the brake calipers are typically arranged to straddle the outer periphery of the brake disc, which is adapted to rotate about an axis of rotation (XX) that defines an axial direction (AA). The brake disc also defines the following directions: a radial direction (RR) generally orthogonal to the axial direction (AA), a circumferential direction (CC) orthogonal to both the axial direction (AA) and the radial direction (RR), and a tangential direction (TT) locally, or more precisely, at the intersection of the axial and radial directions, orthogonal to both the axial direction (AA) and the radial direction (RR).
[0003] As is known, a disc for a disc brake includes a bell-shaped element or support adapted to associate the disc with a wheel hub or axle of a vehicle, and an annular portion, referred to as a brake band, extends from the bell-shaped element or support for engaging with the brake pads of the caliper.
[0004] Disc brake springs are known to include a central portion and two end portions, wherein the end portions are positioned as abutments to apply pressure to the pads in an elastic manner to keep the pads away from each other, thereby ensuring that the pads separate from the brake disc after each braking action.
[0005] Therefore, the known springs are used to achieve triple action: - Reduce pad vibration, thereby limiting unwanted pad movement (vibration, noise, and abnormal wear). - Keep the pad away from the brake disc to reduce or eliminate residual braking torque (residual torque) caused by undesirable contact between the pad and the brake disc when braking is not engaged. - To achieve uniform wear of the friction lining of the pad.
[0006] For example, JP2011226552A illustrates such a solution.
[0007] In the prior art, springs typically rest against the top portion of the pad, and thus transmit the separation force directly to the pad at the top, which is understood to be the outer edge in the radial direction relative to the axis of rotation of the brake disc.
[0008] In existing braking systems, the correct positioning between disc brake components, particularly between the spring and the brake pad, depends on friction, which is generated by the elastic force exerted by the spring on the support and pad when it deforms. This elastic force can typically be decomposed along three spatial directions.
[0009] The values of these frictional forces depend on: - Define the materials in contact that have a specific coefficient of friction; - The value of the elastic force transmitted by the spring.
[0010] If the system is subjected to external forces, such as vibration or unintentional contact with an external object, or during maintenance of the clamp or by routine forces outside the system, the external forces are decomposed along two principal directions that are parallel and perpendicular to the geometry of the contact area.
[0011] If the frictional force generated by contact is greater than the sliding force of the spring on the pad, the balance between the spring and the pad remains unchanged.
[0012] Otherwise, the system will be disturbed and will automatically enter a new equilibrium position different from the first equilibrium position, thereby changing the dynamics of the transmitted force, which in turn affects the function of the spring-pad assembly and thus changes the normal function of the braking system.
[0013] In particular, in brake calipers for motorcycles, and more specifically in floating type brake calipers, the use of springs involves applying a radial load to the pad, thereby limiting undesirable pad movement (vibration, noise, and abnormal wear). Existing technology for floating calipers involves using "flat" or strip-shaped pad springs with fins connected by lateral members. The fins act on the pad from both the reaction side and the action side (or piston side) and are typically connected to each other. These known solutions are not suitable for achieving a suitable axial thrust component for moving the brake pad away from the brake disc's braking surface.
[0014] To address this issue, existing technologies incorporate a wire spring parallel to the strip spring, which generates an elastic bias in the axial direction. However, this solution is clearly complex and costly to implement because it requires the use of two different springs in the same brake caliper.
[0015] Therefore, there is a strong need to bias the movement of the brake pads in order to generate the most constant and precise axial load possible throughout the entire service life of the brake pads, i.e., during the wear of the brake pad friction material.
[0016] In particular, there is still a strong sense of need to ensure that the position of the spring-pad contact point does not change, even after an external bias is applied to the system. Summary of the Invention
[0017] The object of the present invention is to provide a strip spring that, when braking is stopped, ensures axial action for moving the pad away from the surface of the brake disc, and wherein the elastic action is as uniform as possible during wear of the brake pad.
[0018] These and other objectives and advantages are achieved by the band spring according to claim 1.
[0019] Some advantageous embodiments are the subject of the dependent claims.
[0020] With the proposed solution, a strip spring can be provided, and thus a brake caliper and disc brake can be provided, thereby ensuring that the pad is elastically biased in the axial direction when the braking action stops, so that the pad moves away from the surface of the brake disc.
[0021] Furthermore, this invention allows the elastic effect to remain as uniform as possible during the wear of the brake pad.
[0022] According to an embodiment, the present invention provides an asymmetric spring for a floating caliper, wherein the reaction side arm (the side of the floating caliper without a piston) and the action side arm (the side of the floating caliper having at least one piston) are separated from each other.
[0023] The reaction arm and the action arm deform during the assembly of the pad to ensure the radial load component, but at least on the action side, the required axial load component is also ensured.
[0024] The strip spring is "asymmetrical" because it is asymmetrical with respect to the circumferential direction passing through the central part of the spring: the window or "cutout" that separates the reaction arm and the action arm is displaced relative to the central plate-like part of the spring, and in fact the action arm is longer than the reaction arm in the axial direction.
[0025] The action arm is responsible for generating the axial load during braking. In practice, during operation, the action arm bends radially due to the action of the action pad, causing the central spring section to twist (torsion spring action) and ultimately generating the desired axial component.
[0026] The technical effect of the proposed spring geometry is to maximize the lever arm that generates axial load.
[0027] Furthermore, since the action-side gasket or piston-side gasket translates axially due to wear of the friction material during its service life, the geometry of the action-side arm ensures that the axial component is independent of the axial advance of the gasket due to wear.
[0028] Furthermore, according to the implementation, disconnecting the reaction arm from the action arm or piston arm accommodates any load imbalance caused by manufacturing or arrangement defects in the brake pads.
[0029] The strip spring according to the invention also includes two retaining teeth located on the reaction side arm, which are formed by folding the end of the arm.
[0030] The resulting technical effect is to limit the axial movement of the reaction side pads during installation on the vehicle and during use. In fact, the reaction side pads always remain stationary relative to the caliper body and abut against these reaction teeth, which are also referred to below as the third retaining teeth.
[0031] The spring according to the invention also includes a fastening region or fixing portion for fastening the caliper body, which is not centered relative to the strip spring, but is shifted to the body action portion of the spring. According to an embodiment, the body action portion is disposed at a first fixed end of the central spring section, which is mechanically independent from the spring's action arm and reaction arm.
[0032] The provided technical advantage is that, during operation, the fastening or retaining area is not further biased by other loads besides those generated solely from assembling the strip spring to the caliper body. In fact, the load generated in the spring during braking tends to concentrate in the central section of the spring without overloading the retaining portion. Attached Figure Description
[0033] Further features and advantages of the strip spring will become apparent from the following description of preferred exemplary embodiments of the invention, given by way of non-limiting illustration with reference to the accompanying drawings, in which: - Figure 1 An isometric view of a floating brake caliper, preferably but not necessarily for motorcycles, is shown, as viewed from the action side. The caliper is arranged to straddle the brake disc shown here in dashed lines, and together with the brake disc, forms a disc brake. - Figure 2 It shows Figure 1 An axonometric view of the brake caliper cut along a plane including both radial and circumferential directions, and cut at the centerline of the reaction pad plate. - Figure 3 It shows Figure 1 The cross-sectional view of the brake caliper is cut along a plane including the axial and radial directions and at the axis of symmetry of the actuation device; - Figure 4 This shows the view from the reaction side. Figure 1 Axonometric view of the brake caliper; - Figure 5 It shows Figure 4The brake caliper is shown in an axonometric view cut in a plane including the radial and circumferential directions, wherein the cut faces the first brake pad or actuating pad. - Figure 6 It shows Figure 4 An isometric view of a brake caliper, in which the floating body of the brake caliper is shown moving radially to show the bracket, guide, brake pad, and band spring; - Figure 7 An isometric view of the first and second brake pad assemblies and the associated band spring, as seen from the circumferential and actuating sides, is shown. - Figure 8 It shows Figure 7 The components are viewed from opposite sides in the circumferential direction; - Figure 9 An axonometric view of the band spring protruding from the radial side of the fixed arm is shown; - Figure 10 It shows Figure 9 Axonometric view of the strip spring from the opposite radial side; - Figure 11 It shows Figure 9 The plan view of the strip spring, that is, the plan view along the inner radial direction; - Figure 12 It shows Figure 9 The side view of the strip spring, that is, the side view in the direction tangent to the circumferential direction; - Figure 13 It shows Figure 9 The axial side view of the strip spring, that is, the side view along the axial direction; - Figure 14 and Figure 15 It shows Figure 7 The plan view of the components, wherein the pad is shown only as having a support plate, and the pad is in both unworn and fully worn states. Detailed Implementation
[0034] According to the general implementation, a strip spring 1 is provided that is shaped and arranged to span across the brake disc 2.
[0035] The brake disc 2 is adapted to rotate about a rotation axis XX, which defines the following directions: an axial direction AA parallel to the rotation axis XX, a radial direction RR orthogonal to the rotation axis XX, and a circumferential direction CC orthogonal to both the axial direction AA and the radial direction RR. Furthermore, locally, more precisely, at the intersection of the axial direction AA and the radial direction RR, the tangent direction TT is defined as being orthogonal to both the axial direction AA and the radial direction RR.
[0036] The radial direction RR has an outer radial direction Re when it is oriented away from the rotation axis XX, and has an inner radial direction Ri when it is oriented toward the rotation axis XX.
[0037] When the strip spring 1 is assembled in the caliper body 11 that accommodates the opposing first brake pad 3 and second brake pad 4, it applies an elastic force to the first brake pad 3 or the actuating pad, thereby: biasing the first brake pad 3 away from the brake disc 2, thus biasing the first brake pad 3 away from the brake disc 2 approximately in the axial direction AA; and biasing the first brake pad 3 in the radial direction RR.
[0038] Furthermore, when the strip spring 1 is assembled in the caliper body 11 that accommodates the opposing first brake pad 3 and second brake pad 4, it applies an elastic force to the second brake pad 4 or reaction pad opposite to the first brake pad or action pad 3, so as to bias the second brake pad 4 in the radial direction RR.
[0039] The strip spring 1 includes a spring body 5.
[0040] The spring body 5 is strip-shaped. For example, the spring body 5 includes a strip-shaped member. For example, the spring body 5 is obtained by cutting a plate of spring material, such as spring steel, and shaping the cut part into a three-dimensional template as described below.
[0041] The spring body 5 includes an action body portion 6 adapted to bias the first brake pad 3.
[0042] The spring body 5 includes a reaction body portion 7 adapted to abut against the second brake pad 4.
[0043] The spring body 5 has a central line 9 parallel to the circumferential direction CC. For example, when the spring is assembled to straddle the brake disc 2, the central line 9 is tangent to the circumferential direction CC and extends in a direction TT that is transverse to the axial direction AA, and the central line 9 is arranged in the middle of the spring body 5, the extension of which is evaluated along the axial direction AA.
[0044] The spring body 5 has an asymmetrical shape relative to the central line 9. That is, the spring body 5 is asymmetrical with respect to the central line 9.
[0045] The spring body 5 includes a fixing portion 10 for fixing the strip spring 1 to the caliper body 11.
[0046] As described above, the caliper body 11 is arranged to straddle the brake disc 2 and to accommodate the first pad 3 and the second pad 4.
[0047] The fixed portion 10 is located away from the central line 9 and is arranged in the functional body portion 6.
[0048] According to an alternative embodiment, the action body portion 6 includes two action arms 12, 13, which protrude in a cantilever manner when the strip spring 1 is not assembled with the caliper body 11.
[0049] According to an alternative embodiment, the action body portion 6 includes two action arms 12, 13, which protrude in a cantilever manner when the strip spring 1 is not assembled with the caliper body 11, and each action arm has at least one action segment 14, 15 extending in the axial direction AA.
[0050] According to an alternative embodiment, the action body portion 6 includes two action arms 12, 13, which protrude in a cantilever manner when the strip spring 1 is not assembled with the caliper body 11, and each action arm is formed in an "L" shape having at least one action segment 14, 15 extending in the axial direction AA.
[0051] According to an alternative embodiment, the action body portion 6 includes two action arms 12 and 13 that cantilever when the strip spring 1 is not assembled with the caliper body 11. Each action arm has at least one action segment 14 or 15 extending in the axial direction AA. The action segments 14 and 15 are arranged parallel to each other.
[0052] According to an alternative embodiment, the actuating body portion 6 includes two actuating arms 12 and 13 that cantilever when the strip spring 1 is not assembled with the caliper body 11. Each actuating arm has at least one actuating segment 14 or 15 with a raised actuating arm edge 16. This feature allows for the provision of a lower resting surface facing the brake pad, which is rounded to prevent the strip spring 1 from snaging with the first brake pad 3 in the circumferential direction CC.
[0053] According to an alternative implementation, the reaction body portion 7 includes two reaction arms 17, 18, which protrude in a cantilever manner when the strip spring 1 is not assembled with the caliper body 11.
[0054] According to an alternative embodiment, the reaction body portion 7 includes two reaction arms 17, 18, which protrude in a cantilever manner when the strip spring 1 is not assembled with the caliper body 11, and each reaction arm has at least one reaction segment 19, 20 extending in a direction tangent to the circumferential direction CC.
[0055] According to an alternative embodiment, the reaction body portion 7 includes two reaction arms 17, 18, which protrude in a cantilever manner when the strip spring 1 is not assembled with the caliper body 11. Each reaction arm is formed in an "S" shape and has at least one reaction segment 19, 20 extending in a direction tangent to the circumferential direction CC.
[0056] According to an alternative embodiment, the reaction body portion 7 includes two reaction arms 17, 18, which protrude in a cantilever manner when the strip spring 1 is not assembled with the caliper body 11, and each reaction arm has at least one reaction segment 19, 20 extending in a direction tangent to the circumferential direction CC.
[0057] According to an alternative embodiment, the reaction body portion 7 includes two reaction arms 17, 18 that cantilever when the strip spring 1 is not assembled with the caliper body 11. Each reaction arm has at least one reaction segment 19, 20 with a raised reaction arm end edge 21. By virtue of this feature, the strip spring has a lower surface resting on the brake pad, which is blunted and adapted to prevent the strip spring 1 from hooking onto the second brake pad 4, at least in the circumferential direction CC.
[0058] According to an alternative implementation, when the strip spring 1 is not assembled with the caliper body 11, the two actuating arms 12, 13 and the two reaction arms 17, 18 protrude independently of each other in a cantilevered manner.
[0059] According to an alternative implementation, when the strip spring 1 is not assembled with the caliper body 11, the two action arms 12, 13 and the two reaction arms 17, 18 all protrude independently of each other in a cantilevered manner.
[0060] According to an alternative embodiment, the actuating segments 14 and 15 of the two actuating arms 12 and 13 have an extension along the axial direction AA that is larger than the extensions along the axial direction AA of the reaction segments 19 and 20 of the two reaction arms 17 and 18.
[0061] According to an alternative embodiment, the action body portion 6 includes two action arms 12 and 13. When the strip spring 1 is not assembled with the caliper body 11, the two action arms 12 and 13 are arranged to form action surfaces 22. The action surfaces 22 are arranged in an inclined plane or action plane indicated by the reference numeral Pa. The inclined plane or action plane forms an action angle 23 relative to the axial direction AA in a plane including the axial direction AA and the radial direction RR.
[0062] According to an alternative embodiment, the action body portion 6 includes two action arms 12 and 13. When the strip spring 1 is not assembled with the caliper body 11, the two action arms 12 and 13 are arranged to form action surfaces 22. The action surfaces 22 are arranged in an inclined plane or action plane Pa, which forms an action angle 23 relative to the axial direction AA in a plane including the axial direction AA and the radial direction RR.
[0063] The action angle 23 has a predetermined size such that when the strip spring 1 is assembled in the caliper body 11 and biases the first brake pad 3, the two action arms 12, 13 are arranged to preload the first brake pad 3 in a predetermined manner, thereby: biasing the first brake pad 3 in a predetermined and approximately approximate manner along the axial direction AA and biasing the first brake pad 3 away from the brake disc 2; and biasing the first brake pad 3 in a predetermined and approximately approximate manner along the inward radial direction Ri.
[0064] According to an alternative embodiment, the reaction body portion 7 includes two reaction arms 17 and 18. When the strip spring 1 is not assembled with the caliper body 11, the two reaction arms 17 and 18 are arranged to form a reaction surface 24. The reaction surface 24 is arranged in an inclined plane or reaction plane Pr, which forms a reaction angle 25 relative to a direction TT tangent to the circumferential direction CC in a plane including the circumferential direction CC and the radial direction RR.
[0065] According to an alternative embodiment, the reaction body portion 7 includes two reaction arms 17 and 18. When the strip spring 1 is not assembled with the caliper body 11, the two reaction arms 17 and 18 are arranged to each form a reaction surface 24. This reaction surface 24 is arranged in an inclined plane or reaction plane Pr, which forms a reaction angle 25 relative to a direction TT tangent to the circumferential direction CC in a plane including the circumferential direction CC and the radial direction RR. The reaction angle 25 has a predetermined size such that when the strip spring 1 is assembled in the caliper body 11 and biases the second brake pad 4, the two reaction arms 17 and 18 are arranged to preload the second brake pad 4 in a predetermined manner, thereby biasing the second brake pad 4 in a predetermined and approximately approximate manner along the inner radial direction Ri.
[0066] According to an alternative implementation, the fixing portion 10 includes two fixing arms 26, 27 that are snapped together with the caliper body 11.
[0067] According to an alternative embodiment, the fixing portion 10 includes two fixing arms 26, 27 that are snapped together with the caliper body 11, the fixing arms 26, 27 extending generally in the radial direction RR; Or one of them The fixing part 10 includes two fixing arms 26, 27 adapted to snap into the caliper body 11, each arm having a fixing arm end 28 which is folded into a fixing seat 29 provided in the caliper body 11.
[0068] According to an alternative embodiment, the strip spring 1 includes a central spring section 30.
[0069] According to an alternative embodiment, the fixing portion 10 protrudes from the first fixing end 31 of the central spring section 30.
[0070] According to an alternative embodiment, the actuating body portion 6, which is adapted to bias the first brake pad 3, protrudes from the middle portion 32 of the central spring section 30.
[0071] According to an alternative embodiment, the reaction body portion 7 adapted to abut against the second brake pad 4 protrudes from the second end 33 of the central spring section 30, the second end being opposite to the first fixed end 31.
[0072] According to an alternative embodiment, when the strip spring 1 is assembled on the caliper body 11, the strip spring 10 includes a central spring section 30 having a longitudinal extension oriented in a generally axial direction AA.
[0073] According to an alternative embodiment, the fixing portion 10 protrudes from the opposite edge of the first fixing end 31 of the central spring section 30 via two fixing arms 26, 27.
[0074] According to an alternative implementation, the actuating body portion 6, which is adapted to bias the first brake pad 3, protrudes from the opposite edges of the middle portion 32 of the central spring section 30 via two actuating arms 12, 13.
[0075] According to an alternative embodiment, the reaction body portion 7 adapted to abut against the second brake pad 4 protrudes from the opposite edge of the second end portion 33 of the central spring section 30 via two reaction arms 17, 18, the second end portion being opposite to the first fixed end portion 31.
[0076] According to an alternative embodiment, when the strip spring 1 is assembled on the caliper body 11, the strip spring 1 includes a central spring section 30 having a longitudinal extension oriented in a generally axial direction AA.
[0077] According to an alternative embodiment, the fixing portion 10 protrudes from the opposite edge of the first fixing end 31 of the central spring section 30 via two fixing arms 26, 27.
[0078] According to an alternative embodiment, the first fixed end 31 is bent to form a first retaining tooth 34.
[0079] According to an alternative implementation, the actuating body portion 6, which is adapted to bias the first brake pad 3, protrudes from the opposite edges of the middle portion 32 of the central spring section 30 via two actuating arms 12, 13.
[0080] According to an alternative embodiment, the reaction body portion 7 adapted to abut against the second brake pad 4 protrudes from the opposite edge of the second end portion 33 of the central spring section 30 via two reaction arms 17, 18, the second end portion being opposite to the first fixed end portion 31.
[0081] According to an alternative embodiment, the second end portion 33 is bent to form a second retaining tooth 35.
[0082] According to an alternative embodiment, when the strip spring 1 is assembled on the caliper body 11, the strip spring 1 includes a central spring section 30 having a longitudinal extension oriented in a generally axial direction AA.
[0083] According to an alternative embodiment, the fixing portion 10 protrudes from the opposite edge of the first fixing end 31 of the central spring section 30 via two fixing arms 26, 27.
[0084] According to an alternative implementation, the actuating body portion 6, which is adapted to bias the first brake pad 3, protrudes from the opposite edges of the middle portion 32 of the central spring section 30 via two actuating arms 12, 13.
[0085] According to an alternative embodiment, the reaction body portion 7 adapted to abut against the second brake pad 4 protrudes from the opposite edge of the second end portion 33 of the central spring section 30 via two reaction arms 17, 18, the second end portion being opposite to the first fixed end portion 31.
[0086] According to an alternative embodiment, each of the two reaction arms 17 and 18 has a reaction arm reaction section 19 and 20 at its end, the reaction arm reaction section 19 and 20 having an edge portion oriented in a tangential direction TT tangential to the circumferential direction CC and being folded to form a third retaining tooth 36.
[0087] According to an alternative implementation, the spring body 5 is manufactured as a single piece.
[0088] According to an alternative embodiment, the spring body 5 is made in a single piece and is formed from a single plate of cut and shaped spring material.
[0089] The present invention also relates to a brake caliper 40, which includes a caliper body 11 adapted to be arranged across a brake disc 2.
[0090] The brake disc 2 is adapted to rotate about a rotation axis XX, which defines the following directions: an axial direction AA parallel to the rotation axis XX, a radial direction RR orthogonal to the rotation axis XX, and a circumferential direction CC orthogonal to both the axial direction AA and the radial direction RR; and wherein the radial direction RR has an outward radial direction Re when oriented away from the rotation axis XX, and an inward radial direction Ri when oriented towards the rotation axis XX.
[0091] The brake caliper 40 also includes a first brake pad 3 or an action pad, which is housed in the caliper body 11 and adapted to be biased against the first brake surface 41 of the brake disc 2 to apply a braking action.
[0092] The brake caliper 40 also includes a second brake pad 4 or a reaction pad, which is housed in the caliper body 11 and adapted to be biased against the second brake surface 42 of the brake disc 2 to apply a braking effect.
[0093] The brake caliper 40 also includes at least one strip spring 1 as described in any of the embodiments described above.
[0094] According to an alternative embodiment, the caliper body 11 is a floating caliper body and includes a floating body 44 and a bracket 43 that can be fixed to a vehicle support. The floating body 44 accommodates a thrust device 45 adapted to bias a first action pad 3, wherein the floating body 44 moves along a guide 46 supported by the bracket 43.
[0095] According to an alternative embodiment, the floating body 44 includes a floating body support portion 47, which includes two opposite caliper body seats 29, which accommodate the fixing arm end 28 of the fixing portion 10 of the strip spring 1 by means of a snap-fit.
[0096] The present invention also relates to a disc brake 47, which includes a brake disc 2 and a brake caliper 40 according to any of the embodiments described above.
[0097] Figure Labels 1. Strip spring 2 Brake disc 3. First brake pad or action pad 4. Second brake pad or reaction pad 5. Spring body 6. Functional Body Part 7. Reaction Body Part 8. Reaction Body Part 9. Central line 10 Fixed parts 11. Caliper Body 12-Action Arm 13. Actuating Arm 14. Actuating arm, actuating section 15. Actuating arm, actuating section 16. Edge of the action arm 17. Reaction Arm 18 Reaction Arm 19. Reaction Arm, Reaction Section 20 Reaction Arm Reaction Section 21. Edge of the reaction arm end 22. Functional Surface 23. Angle of Action 24 Reaction Surface 25° reaction angle 26 Fixed Arm 27 Fixed Arm 28. A fixed arm end 29. Caliper body mounting position 30 Central Spring Section 31 The first fixed end of the central spring section 32. The middle part of the central spring section 33 The second end of the central spring section 34 First retaining tooth at the first fixed end 35 The second retaining tooth at the second fixed end 36 Third retaining tooth 40 Brake Caliper 41 The first braking surface of the brake disc 42. The second braking surface of the brake disc 43 brackets 44 Floating Body 45. Propulsion device 46. Guide 47 Disc brake The axis of rotation of the XX brake disc AA Axial direction RR Radial direction TT tangent direction CC circumferential direction Re: Outer radial direction Ri refers to the inner radial direction. Pa acting plane Pr is the reaction plane.
Claims
1. A strip spring (1) shaped to be arranged across a brake disc (2), wherein, - The brake disc (2) is adapted to rotate about a rotation axis (XX), which defines the following directions: an axial direction (AA) parallel to the rotation axis (XX), a radial direction (RR) orthogonal to the rotation axis (XX), and a circumferential direction (CC) orthogonal to both the axial direction (AA) and the radial direction (RR); and wherein the radial direction (RR) has an outward radial orientation (Re) when oriented away from the rotation axis (XX), and an inward radial orientation (Ri) when oriented toward the rotation axis (XX); - The strip spring (1) is adapted to apply an elastic action to the first brake pad (3) or the action pad, thereby: biasing the first brake pad (3) away from the brake disc (2) and thus biasing the first brake pad (3) away from the brake disc (2) approximately in the axial direction (AA); and biasing the first brake pad (3) in the radial direction (RR); - The strip spring (1) is adapted to apply an elastic force to the second brake pad (4) or the reaction pad opposite to the action pad (3) to bias the second brake pad (4) in the radial direction (RR); -The strip spring (1) includes a spring body (5); -The spring body (5) is strip-shaped; - The spring body (5) includes an action body portion (6) adapted to bias the first brake pad (3); - The spring body (5) includes a reaction body portion (7) adapted to abut against the second brake pad (4); - The spring body (5) has a central line (9) which is tangent to the circumferential direction (CC) and extends laterally to the axial direction (AA) when the spring is assembled to straddle the brake disc (2). The central line (9) is located in the middle of the spring body (5) when evaluating the extension of the spring body (5) along the axial direction (AA). - The spring body (5) has an asymmetrical shape relative to the central line (9); - The spring body (5) includes a fixing part (10) for fixing the strip spring (1) to the caliper body (11), wherein the caliper body (11) is arranged to straddle the brake disc (2) and accommodate the first pad (3) and the second pad (4); - The fixed part (10) is arranged in the functional body part (6) away from the central line (9).
2. The strip spring (1) according to claim 1, wherein, The action body part (6) includes two action arms (12, 13), which protrude in a cantilever manner when the strip spring (1) is not assembled with the caliper body (11); Or one of them, The action body part (6) includes two action arms (12, 13). When the strip spring (1) is not assembled with the caliper body (11), the two action arms (12, 13) protrude in a cantilever manner. Each of the two action arms (12, 13) has at least one action segment (14, 15) extending along the axial direction (AA). Or one of them, The action body part (6) includes two action arms (12, 13). When the strip spring (1) is not assembled with the caliper body (11), the two action arms (12, 13) protrude in a cantilever manner. Both action arms (12, 13) are formed in an "L" shape with at least one action segment (14, 15) extending along the axial direction (AA). Or one of them, The action body part (6) includes two action arms (12, 13). When the strip spring (1) is not assembled with the caliper body (11), the two action arms (12, 13) protrude in a cantilever manner. Each of the two action arms (12, 13) has at least one action segment (14, 15) extending along the axial direction (AA). The action segments (14, 15) of the two action arms (12, 13) remain parallel to each other. Or one of them, The action body part (6) includes two action arms (12, 13). When the strip spring (1) is not assembled with the caliper body (11), the two action arms (12, 13) protrude in a cantilever manner. Each of the two action arms (12, 13) has at least one action segment (14, 15), and the at least one action segment (14, 15) has a protruding action arm edge (16).
3. The strip spring (1) according to claim 1 or 2, wherein, The reaction body part (7) includes two reaction arms (17, 18), which protrude in a cantilever manner when the strip spring (1) is not assembled with the caliper body (11); Or one of them, The reaction body part (7) includes two reaction arms (17, 18). When the strip spring (1) is not assembled with the caliper body (11), the two reaction arms (17, 18) protrude in a cantilever manner. Each of the two reaction arms (17, 18) has at least one reaction section (19, 20) extending in a direction tangent to the circumferential direction (CC). Or one of them, The reaction body part (7) includes two reaction arms (17, 18). When the strip spring (1) is not assembled with the caliper body (11), the two reaction arms (17, 18) protrude in a cantilever manner. The two reaction arms (17, 18) are both formed in an "S" shape and have at least one reaction section (19, 20) extending in a direction tangent to the circumferential direction (CC). Or one of them, The reaction body part (7) includes two reaction arms (17, 18). When the strip spring (1) is not assembled with the caliper body (11), the two reaction arms (17, 18) protrude in a cantilever manner. Each of the two reaction arms (17, 18) has at least one reaction section (19, 20) extending in a direction tangent to the circumferential direction (CC). Or one of them, The reaction body part (7) includes two reaction arms (17, 18). When the strip spring (1) is not assembled with the caliper body (11), the two reaction arms (17, 18) protrude in a cantilever manner. Each of the two reaction arms (17, 18) has at least one reaction section (19, 20), and the at least one reaction section (19, 20) has a raised reaction arm end edge (21).
4. The strip spring (1) according to claim 3 when referring to claim 2, wherein, When the strip spring (1) is not assembled with the caliper body (11), the two action arms (12, 13) and the two reaction arms (17, 18) protrude independently of each other in a cantilever manner; Or one of them, When the strip spring (1) is not assembled with the caliper body (11), the two action arms (12, 13) and the two reaction arms (17, 18) protrude independently of each other in a cantilever manner; Or one of them, The action segments (14, 15) of the two action arms (12, 13) have a larger extension along the axial direction (AA) than the extensions along the axial direction (AA) of the reaction segments (19, 20) of the two reaction arms (17, 18).
5. The strip spring (1) according to any one of the preceding claims, wherein, The action body part (6) includes two action arms (12, 13), wherein, when the strip spring (1) is not assembled with the caliper body (11), the two action arms (12, 13) are arranged to form action surfaces (22), the action surfaces (22) are arranged in an inclined plane or action plane (Pa), the inclined plane or action plane (Pa) forming an action angle (23) relative to the axial direction (AA) in a plane including the axial direction (AA) and the radial direction (RR). Or one of them, The action body part (6) includes two action arms (12, 13), wherein, when the strip spring (1) is not assembled with the caliper body (11), the two action arms (12, 13) are arranged to form action surfaces (22), the action surfaces (22) are arranged in an inclined plane or action plane (Pa), the inclined plane or action plane (Pa) forming an action angle (23) relative to the axial direction (AA) in a plane including the axial direction (AA) and the radial direction (RR), wherein the action angle (23) has a predetermined value. The size is such that when the strip spring (1) is assembled in the caliper body (11) and biases the first brake pad (3), the two actuating arms (12, 13) are arranged to preload the first brake pad (3) in a predetermined manner such that: the first brake pad (3) is biased in a predetermined and approximately proximal manner along the axial direction (AA) and biased away from the brake disc (2); and the first brake pad (3) is biased in a predetermined and approximately proximal manner along the inner radial direction (Ri).
6. The strip spring (1) according to any one of the preceding claims, wherein, The reaction body part (7) includes two reaction arms (17, 18), wherein, when the strip spring (1) is not assembled with the caliper body (11), the two reaction arms (17, 18) are arranged to form a reaction surface (24), the reaction surface (24) is arranged in an inclined plane or reaction plane (Pr), the inclined plane or reaction plane (Pr) forming a reaction angle (25) in a plane including the circumferential direction (CC) and the radial direction (RR) relative to the direction tangent to the circumferential direction (CC). Or one of them, The reaction body portion (7) includes two reaction arms (17, 18), wherein, when the strip spring (1) is not assembled with the caliper body (11), the two reaction arms (17, 18) are arranged to form a reaction surface (24), the reaction surface (24) being arranged in an inclined plane or reaction plane (Pr), the inclined plane or reaction plane (Pr) forming a reaction angle (25) in a plane including the circumferential direction (CC) and the radial direction (RR) relative to a direction tangent to the circumferential direction (CC), wherein the reaction angle (25) has a predetermined size such that when the strip spring (1) is assembled in the caliper body (11) and biases the second brake pad (4), the two reaction arms (17, 18) are arranged to preload the second brake pad (4) in a predetermined manner, thereby biasing the second brake pad (4) in a predetermined and approximately approximate manner along the inner radial direction (Ri).
7. The strip spring (1) according to any one of the preceding claims, wherein, The fixing part (10) includes two fixing arms (26, 27) adapted to be snapped into the caliper body (11). Or one of them, The fixing part (10) includes two fixing arms (26, 27) adapted to snap into the caliper body (11), the two fixing arms (26, 27) extending generally in the radial direction (RR); Or one of them, The fixing part (10) includes two fixing arms (26, 27) adapted to be snapped into the caliper body (11), each of the two fixing arms (26, 27) having a fixing arm end (28) which is folded into a fixing seat (29) provided in the caliper body (11).
8. The strip spring (1) according to any one of the preceding claims, wherein, The strip spring (1) includes a central spring section (30); and wherein, The fixing portion (10) protrudes from the first fixing end (31) of the central spring section (30); and wherein, The actuating body portion (6), adapted to bias the first brake pad (3), protrudes from the middle portion (32) of the central spring section (30); and wherein, The reaction body portion (7) adapted to abut against the second brake pad (4) protrudes from the second end (33) of the central spring section (30), the second end being opposite to the first fixed end (31); Or one of them, The strip spring (1) includes a central spring section (30), which, when the strip spring (1) is assembled onto the caliper body (11), has a longitudinal extension oriented in a generally axial direction; and wherein, The fixing portion (10) protrudes from the opposite edges of the first fixing end (31) of the central spring section (30) via two fixing arms (26, 27); and wherein, The actuating body portion (6), adapted to bias the first brake pad (3), protrudes from the opposite edges of the middle portion (32) of the central spring section (30) via two actuating arms (12, 13); and wherein, The reaction body portion (7) adapted to abut against the second brake pad (4) protrudes from the opposite edge of the second end (33) of the central spring section (30) via two reaction arms (17, 18), the second end being opposite to the first fixed end (31); Or one of them, The strip spring (1) includes a central spring section (30), which, when the strip spring (1) is assembled onto the caliper body (11), has a longitudinal extension oriented in a generally axial direction; and wherein, The fixing portion (10) protrudes from the opposite edge of the first fixing end (31) of the central spring section (30) by two fixing arms (26, 27), wherein the first fixing end (31) is folded to form a first retaining tooth (34). The actuating body portion (6), adapted to bias the first brake pad (3), protrudes from the opposite edges of the middle portion (32) of the central spring section (30) via two actuating arms (12, 13); and wherein, The reaction body portion (7) adapted to abut against the second brake pad (4) protrudes from the opposite edge of the second end (33) of the central spring section (30) by two reaction arms (17, 18), the second end being opposite to the first fixed end (31), and wherein the second end (33) is folded to form a second retaining tooth (35). Or one of them, The strip spring (1) includes a central spring section (30), which, when the strip spring (1) is assembled onto the caliper body (11), has a longitudinal extension oriented in a generally axial direction; and wherein, The fixing portion (10) protrudes from the opposite edges of the first fixing end (31) of the central spring section (30) via two fixing arms (26, 27); and wherein, The actuating body portion (6), adapted to bias the first brake pad (3), protrudes from the opposite edges of the middle portion (32) of the central spring section (30) via two actuating arms (12, 13); and wherein, The reaction body portion (7) adapted to abut against the second brake pad (4) protrudes from the opposite edge of the second end (33) of the central spring section (30) via two reaction arms (17, 18), the second end being opposite to the first fixed end (31), and wherein each of the two reaction arms (17, 18) has a reaction arm reaction section (19, 20) at its end, the reaction arm reaction section (19, 20) having an edge portion oriented in a direction tangential to the circumferential direction (CC) and being folded to form a third retaining tooth (36).
9. The strip spring (1) according to any one of the preceding claims, wherein, The spring body (5) is a single piece; Or one of them, The spring body (5) is a single piece, and the spring body (5) is formed from a single plate of cut and shaped spring material.
10. A brake caliper (40) comprising a caliper body (11) adapted to be arranged across a brake disc (2), wherein, - The brake disc (2) is adapted to rotate about a rotation axis (XX), which defines the following directions: an axial direction (AA) parallel to the rotation axis (XX), a radial direction (RR) orthogonal to the rotation axis (XX), and a circumferential direction (CC) orthogonal to both the axial direction (AA) and the radial direction (RR), wherein the radial direction (RR) has an outward radial direction (Re) when oriented away from the rotation axis (XX), and the radial direction (RR) has an inward radial direction (Ri) when oriented toward the rotation axis (XX); The brake caliper (40) further includes a first brake pad (3) or an action pad, which is housed in the caliper body (11) and is adapted to be biased against a first brake surface (41) of the brake disc (2) to apply a braking action. The brake caliper (40) further includes a second brake pad (4) or a reaction pad, which is housed in the caliper body (11) and is adapted to be biased against a second brake surface (42) of the brake disc (2) to apply braking action. The brake caliper (40) further includes at least one strip spring (1) according to any one of the preceding claims.
11. The brake caliper (40) according to claim 10, wherein, The caliper body (11) is a floating caliper body, and the caliper body (11) includes a floating body (44) and a bracket (43) that can be fixed to a vehicle support. The floating body (44) accommodates a pusher (45) adapted to bias the first action pad (3), wherein the floating body (44) moves along a guide (46) supported by the bracket (43).
12. The brake caliper (40) according to claim 10 or 11, wherein, The floating body (44) includes a floating body support portion (47), which includes two opposite caliper body seats (29). The caliper body seats (29) accommodate the fixed arm end (28) of the fixed portion (10) of the strip spring (1) by means of a snap-fit.
13. A disc brake (47) comprising a brake disc (2) and a brake caliper (40) according to any one of claims 10 or 11.