Brake back plate assembly

Abstract

A brake backing plate assembly includes a first plate and a second plate. The first plate includes an axle hole having a first diameter; a first portion in the first plane, the first portion defining an axle hole and a plurality of mounting holes circumferentially positioned around the axle hole, where each of the plurality of mounting holes has a second diameter; a circular boundary coaxial with the axle hole and having a third diameter, where the third diameter is equal to the first diameter plus six times the second diameter; and a second portion located in a second plane parallel to the first plane, where the second plane includes at least two protrusions extending radially into the circular boundary. A second plate is mounted to the first plate, the second plate including a first wing and a second wing, with at least a portion of the first wing and at least a portion of the second wing extending into a rounded boundary. The brake backing plate assembly enables the offset of the backing plate or the first plate to be reduced when the brake system is actuated and even when emergency braking is carried out.

Description

Technical Field

[0001] This utility model relates to a brake backplate assembly. Background Technology

[0002] Currently, methods of towing trailers (such as trailers, caravans, campervans, or recreational vehicles (RVs)) with a towing vehicle (such as a truck or other suitable motor vehicle) involve the use of braking systems or braking assemblies of various types, configurations, and designs. These braking systems are configured to communicate with the towing vehicle and to control brakes included in the trailer itself. The trailer includes a chassis or frame and at least one axle carrying at least one pair of wheels for supporting the chassis. A flap extends from the chassis for engagement with the towing vehicle via a trailer hitch assembly. The braking system operatively engages at least one axle of the towing vehicle with respect to the trailer.

[0003] The braking system may include an electric or hydraulic actuator that receives signals from a towing vehicle. The electric or hydraulic actuator pushes or otherwise rotates a pair of brake shoes, thereby generating friction between the brake shoes and the brake drum. The torque of the brake shoes acts on the brake backing plate assembly, thereby generating friction at the brake drum. Utility Model Content

[0004] One aspect of this disclosure relates to a brake backplate assembly, wherein the brake backplate assembly includes a first plate and a second plate, the first plate including: an axle hole having a first diameter; a first portion located in a first plane, the first portion defining the axle hole and a plurality of mounting holes circumferentially positioned around the axle hole, wherein each of the plurality of mounting holes has a second diameter; a circular boundary coaxial with the axle hole and having a third diameter, wherein the third diameter is equal to the first diameter plus six times the second diameter; and a second portion located in a second plane parallel to the first plane, wherein the second plane includes at least two protrusions extending radially into the circular boundary, wherein the second plate is mounted to the first plate, the second plate including a first wing and a second wing, wherein at least a portion of the first wing and at least a portion of the second wing extend into the circular boundary.

[0005] The circular boundary is a first circular boundary, and defines a second circular boundary coaxial with the first circular boundary, wherein the second circular boundary has a fourth diameter smaller than the third diameter.

[0006] The fourth diameter is less than or equal to the first diameter plus four times the second diameter.

[0007] The brake backplate assembly further includes a contoured region extending at least between a first portion in the first plane and a second portion in the second plane, wherein at least a portion of the contoured region extends radially into the second circular boundary.

[0008] The first plate also includes a third portion located in the third plane.

[0009] The transition region is defined as the portion of the first plate extending axially outward from the second portion in the second plane to the third portion in the third plane.

[0010] The second plate is mounted to the first plate by at least two fasteners.

[0011] The second part includes an inward surface and an outward surface, wherein the second plate is mounted to the outward surface to define the mounting surface area of ​​the second plate.

[0012] The ratio of the mounting surface area of ​​the second plate to the total surface area of ​​the second portion is in the range of 1:2.5 to 1:1.

[0013] The brake backplate assembly further includes a third plate, which is mounted to the inner surface of the second portion to define the mounting surface area of ​​the third plate.

[0014] The ratio of the mounting surface area of ​​the third plate to the mounting surface area of ​​the second plate is in the range of 1:5 to 1:2.

[0015] Each of the at least two protrusions includes a plate nose, wherein the plate nose has a radius of curvature in the range of 0.5 inches to 1.25 inches (approximately 1.27 cm to 3.18 cm).

[0016] The first wing or the second wing includes a nose, and wherein the nose has a radius of curvature in the range of 0.5 inches to 1.25 inches (approximately 1.27 cm to 3.18 cm).

[0017] The first plate has a first thickness, and the second plate has a second thickness, wherein the second thickness is greater than the first thickness.

[0018] The brake backplate assembly further includes a third plate mounted to the inner surface of the first plate, wherein the second plate is mounted to the outer surface of the first plate.

[0019] The brake backplate assembly also includes at least two rivets that extend through and connect the second portion of the first plate, the second plate, and the third plate.

[0020] The first plate includes a forming region, which is defined as a portion of the first plate extending from a first portion in the first plane to a second portion in the second plane.

[0021] The axle hole defines the axle axis, and at least a portion of the shaped area of ​​the first plate is located within 2 inches or less from the axle axis.

[0022] The plurality of mounting holes includes five mounting holes, and the brake backplate assembly is used for a 12-inch × 2-inch (approximately 30.5 cm × 5.1 cm) braking system.

[0023] The features and configuration of the brake backplate assembly disclosed herein have the following advantages and technical effects, namely, reducing the offset of the backplate or first plate when the braking system is actuated (even under emergency braking). Attached Figure Description

[0024] In the attached diagram:

[0025] Figure 1 This is a perspective view of the outside of a braking system with a brake backplate assembly.

[0026] Figure 2 yes Figure 1 A perspective view of the inner side of the braking system, which also shows the brake backplate assembly.

[0027] Figure 3 yes Figure 1 Partial exploded view of the braking system.

[0028] Figure 4 yes Figure 3 Front view of the first plate of the brake backplate assembly.

[0029] Figure 5 yes Figure 1 Front view of the brake backplate assembly.

[0030] Figure 6 It is along Figure 5 The cross-sectional view of a portion of the brake backplate assembly is taken from line VI-VI.

[0031] Figure 7 It is along Figure 5 A cross-sectional view of a portion of the brake backplate assembly taken from line VII-VII. Detailed Implementation

[0032] Braking systems for trailers may include a brake backplate assembly having a backplate that receives a portion of the axle and is coupled (e.g., bolted) to an axle brake flange. The backplate provides support for at least the actuator and movable brake shoes. The brake shoes are rotatable or disengaged via one or more portions of the actuator, thereby contacting the brake drum. The contact between the brake shoes and the brake drum exerts a force on the backplate, which may cause deflection. Several aspects of this disclosure include a brake backplate assembly adapted to, configured to, or otherwise capable of reinforcing the backplate to reduce deflection during braking activities, such as, but not limited to, emergency braking. As used herein, braking activities may include, but are not limited to, applying frictional forces to reduce the rotational speed of the wheels, or generally applying a force that ultimately opposes the direction of vehicle motion. Braking activities are signal-based responses. Signals generating braking activities may originate from one or more trailer or vehicle sensors, a user, or any combination thereof. For example, a braking signal may be a braking request issued by a user by actuating the brake pedal. In another instance, one or more sensors or detectors on the vehicle or, optionally, the trailer may provide braking signals. In yet another non-limiting example, the braking signal may include a signal from the towing vehicle indicating a braking request, which may originate from a sensor on the towing vehicle or from a user. In response to receiving the braking signal, the braking system is actuated and the rotation of the wheels relative to the brake backing plate of the braking system is reduced. Although various aspects of this disclosure are described as braking systems for trailers, such braking systems can also be used for any type of wheeled vehicle.

[0033] Figure 1 The braking system 10 is shown as viewed from the outer side 12. The outer side 12 is the side facing the user when the braking system 10 is mounted on the wheel axle. The braking system 10 includes an actuator assembly 14 coupled to an actuator arm 16, a first shoe connecting plate 18 coupled to a first brake shoe 20, a second shoe connecting plate 22 coupled to a second brake shoe 24, and a brake backplate assembly 30. The braking system 10 also includes a brake adjuster assembly 32 and return springs 34, 36. As a non-limiting example, the braking system 10 may be a 12-inch × 2-inch (approximately 30.5 cm × 5.1 cm) braking system. That is, the braking system 10 may have a radial diameter of 12 inches and an axial width of 2 inches.

[0034] An anchor (shown as anchor post 38) extends through the brake backplate assembly 30 and the anchor post washer 40. A first shoe web 18 and a second shoe web 22 are located between the anchor post washer 40 and the brake backplate assembly 30, wherein the first shoe web 18 and the second shoe web 22 can freely engage the anchor post 38. Return springs 34 and 36 can connect the first shoe web 18 and the second shoe web 22 to the anchor post 38.

[0035] The brake backplate assembly 30 includes: a first plate 42, shown as a backplate (e.g., a molded or stamped backplate); and a second plate 44, shown as an outer reinforcing plate, which is coupled to the first plate 42 at an outward face 43. The first plate 42 defines an axle bore 46. A plurality of mounting holes 48 are circumferentially positioned around the axle bore 46. The positions of the plurality of mounting holes 48 are determined according to general industrial dimensions. As a non-limiting example, there may be five mounting holes among the plurality of mounting holes 48, wherein the center-to-center spacing between the lower two mounting holes may be 3 inches, while the center-to-center spacing between all the remaining mounting holes is 2.125 inches. The second plate 44 is coupled to the first plate 42 and is located between the first plate 42 and the actuator arm 16.

[0036] In operation, a brake drum (not shown) can be coupled to the braking system 10 to at least surround the first brake shoe 20 and the second brake shoe 24. The braking system 10 and the brake drum can be mounted to an axle assembly having an axle and an axle brake flange. A portion of the axle is received at an axle bore 46 of the braking system 10. The braking system 10 can be coupled to the axle brake flange using fasteners that extend through a plurality of mounting holes 48 of the braking system 10 and the axle brake flange of the axle assembly. The actuator device 14 of the braking system 10 communicates with the traction vehicle.

[0037] The braking system 10 can respond to a braking signal that engages or actuates the braking system 10 to decelerate the trailer or vehicle. Specifically, the actuator device 14 receives a signal from the towing vehicle and moves or rotates the first shoe connecting plate 18 together with the first brake shoe 20 and the second shoe connecting plate 22 about, for example, a pivot 50. This rotation can be caused by the actuator arm 16. The rotation or movement of the first brake shoe 20 and the second brake shoe 24 causes them to contact the brake drum. The force borne by the brake backplate assembly 30 via the anchor post 38 and the pivot 50 increases during braking activity, supporting the rotating first shoe connecting plate 18, the second shoe connecting plate 22, and the actuator arm 16 throughout the rotation or movement. Additionally or alternatively, the increased tension during braking generated by the return springs 34, 36 can be transmitted at least to the first plate 42 via the anchor post 38.

[0038] In other words, movement of the actuator arm 16, the first shoe connecting plate 18, and the second shoe connecting plate 22, which exert frictional force between the first brake shoe 20 and the second brake shoe 24 and the brake drum, may increase the force applied to the anchor post 38, the pivot 50, or both, which is then transmitted at least to the first plate 42 of the brake backplate assembly 30. However, the design of the first plate 42 and the second plate 44 reduces or eliminates the deflection of the first plate 42 when the braking system 10 is actuated by a traction vehicle (wherein the force is transmitted to the brake backplate assembly 30 at least through the anchor post 38 and the pivot 50).

[0039] When a braking force of up to 10% of 30,000 in-pounds (approximately 3390 Newton-meters) is applied, the use of the brake backplate assembly 30 in the braking system 10 will cause the first plate 42 to face outward 12 or inward 52. Figure 2 Or the offset distance towards both the outside and the inside is less than 0.035 inches (approximately 0.89 millimeters).

[0040] During or after repeated actuation or use of the braking system 10, the brake adjuster assembly 32 can adjust the tension of one or more of the first shoe connecting plate 18 and / or the second shoe connecting plate 22 to maintain the performance of the braking system 10. As an example, the braking system 10 is shown as an electric braking system; however, it is conceivable that the braking system could be a hydraulic braking system.

[0041] Figure 2 The braking system 10 is shown as viewed from the inner side 52, opposite to the outer side 12. That is, after the braking system 10 is installed, the inner side 52 faces downwards from the trailer. The brake backplate assembly 30 also includes a third plate 54 (shown as an inner reinforcing plate). The third plate 54 is attached to the first plate 42 at the inner surface 53 and is attached to the first plate 42 via an anchor post 38. At least two fasteners (e.g., rivets, shown as rivets 56, 58) can connect the third plate 54 and the second plate 44 ( Figure 1 Connect to the first board 42, such as Figure 3 This is further illustrated in the text.

[0042] Figure 3 A partially disassembled braking system 10 is shown. Return springs 34 and 36 include hooks 35 and 37 that engage or snap onto a first receiving portion 60 of an anchor post 38. An anchor post washer 40 is mounted to a second receiving portion 62 of the anchor post 38. A third receiving portion 64 may at least partially contact a first shoe connecting plate 18, a second shoe connecting plate 22, or a portion of the first shoe connecting plate 18 and a portion of the second shoe connecting plate 22.

[0043] The fourth receiving portion 66 of the anchor post 38 is received by the second plate 44, the first plate 42, and the third plate 54 at the anchoring holes 68, 70, and 72. In addition, rivets 56 and 58 connect the first plate 42, the second plate 44, and the third plate 54 of the brake backplate assembly 30 together.

[0044] After assembly, the first plate 42 is located between the second plate 44 and the third plate 54. That is, the second plate 44 is mounted to the outer surface 43 of the first plate 42, and the third plate 54 is mounted to the inner surface 53 of the first plate 42. The mounting surface area of ​​the second plate 44 is defined as the surface area of ​​the second plate 44 that contacts the outer surface 43 of the first plate 42 when the second plate 44 is connected to the first plate 42. The mounting surface area of ​​the third plate 54 is defined as the surface area of ​​the third plate 54 that contacts the inner surface 53 of the first plate 42 when the third plate 54 is connected to the first plate 42.

[0045] The mounting surface area of ​​the third plate 54 is smaller than that of the second plate 44. As a non-limiting example, the ratio of the mounting surface area of ​​the third plate 54 to that of the second plate 44 is in the range of 1:5 to 1:2.

[0046] Figure 4 This is a front view of the first plate 42 as seen from the outer surface 43. An axle axis 78 for entering and exiting the page can be defined at the center of the axle hole 46. The axle hole 46 has a first diameter 80. The first diameter 80 can be a known standard diameter for receiving a previously manufactured axle. As a non-limiting example, the first diameter 80 can be in the range of 3.250 inches to 3.255 inches (approximately 8.255 cm to 8.268 cm).

[0047] Each of the plurality of mounting holes 48 has a second diameter 82. The second diameter 82 may, for example, range from 0.405 inches to 0.410 inches (approximately 1.02 cm to 1.04 cm). Although illustrated by way of example as including five mounting holes, the plurality of mounting holes 48 surrounding the axle hole 46 may include, for example, four, six, or eight mounting holes. That is, any number of mounting holes is conceivable. It is also conceivable that the second diameter may vary depending on the number of mounting holes.

[0048] The first circular boundary 84 may be coaxial with the axle hole 46. That is, the first circular boundary 84 may be centered on the axle axis 78. The first circular boundary 84 has a third diameter 86. The third diameter 86 may be equal to the first diameter 80 plus six times the second diameter 82. A second circular boundary 90 may be defined, coaxial with the first circular boundary 84 or the axle hole 46. The second circular boundary 90 has a fourth diameter 92, which is smaller than the third diameter 86. As a non-limiting example, the fourth diameter 92 may be less than or equal to the first diameter 80 plus four times the second diameter 82. As another non-limiting example, the fourth diameter 92 may be defined as twice the distance from the axle axis 78 to the center of one of the mounting holes 48.

[0049] The first plate 42 may include a first portion 100 that defines at least an axle hole 46 and a plurality of mounting holes 48. The first plate 42 may also include a second portion 102 connected to the first portion 100 via a molding region 104. The molding region 104 is defined by a first boundary 106 defined by the first portion 100 and a second boundary 108 defined by the second portion 102. The second portion 102 of the first plate 42 defines an anchoring hole 70.

[0050] The second part 102 includes at least two protrusions (shown as a first protrusion 110 and a second protrusion 112). The first protrusion 110 and the second protrusion 112 extend radially toward the axle axis 78 such that the first protrusion 110 and the second protrusion 112 overlap, are positioned or extend into the first circular boundary 84.

[0051] At least the portion 114 of the formed region 104 between the first protrusion 110 and the axle hole 46, or between the second protrusion 112 and the axle hole 46, may overlap, be positioned, or extend into the first circular boundary 84. Furthermore, at least the portion 116 of the formed region 104 between the first protrusion 110 and the axle hole 46, or between the second protrusion 112 and the axle hole 46, may overlap, be positioned, or extend into the second circular boundary 90. It is conceivable that at least a portion of the formed region 104 is located within two inches (approximately 5 cm) or less from the axle axis 78.

[0052] Figure 5 This is a front view of the brake backplate assembly 30, which also shows a second plate 44 mounted to the outer surface 43 of the first plate 42. The second plate 44 includes a first wing 120 and a second wing 122 (indicated by dashed lines). The dashed lines are located on either side of the centerline 124. The first wing 120, the second wing 122, or both may include more or fewer portions of the second plate 44 than shown. That is, the first wing 120, the second wing 122, or both may include a larger or smaller peripheral edge or peripheral portion of the second plate 44 than shown.

[0053] At least a portion of the first wing 120 and at least a portion of the second wing 122 are positioned, overlap, or extend into the first circular boundary 84. For example, at least a portion of the first wing 120 and at least a portion of the second wing 122 are located within a range of three inches from the axle axis.

[0054] The portion of the first wing 120 extending into the first circular boundary 84 includes a first nose 126. Similarly, the second wing 122 includes a second nose 128. The first nose 126 and the second nose 128 may have radii of curvature ranging from 0.5 inches to 1.25 inches (approximately 1.27 cm to 3.18 cm).

[0055] The portion of the second portion 102 of the first plate 42 extending into the first circular boundary 84 may include a first plate nose 130 and a second plate nose 132. As illustrated, as an example, a first nose 126 of the first wing 120 corresponds to or is positioned adjacent to the first plate nose 130. A second nose 128 of the second wing 122 corresponds to or is positioned adjacent to the second plate nose 132. Similarly, the first plate nose 130 and the second plate nose 132 may have radii of curvature in the range of 0.5 inches to 1.25 inches (approximately 1.27 cm to 3.18 cm). For example, the first plate nose 130 and the second plate nose 132 may have radii of curvature in the range of 1.10 inches to 1.12 inches (approximately 2.79 cm to 2.84 cm). As used herein, the term “adjacent” is defined as a distance between two objects less than or equal to the second diameter 82.

[0056] Although shown to have the same radius of curvature, it is conceivable that the radius of curvature of the first nose 126 and the second nose 128 may be different from the radius of curvature of the first plate nose 130 and the second plate nose 132.

[0057] The second portion 102 of the first plate 42 can have a total surface area. The ratio of the mounting surface area of ​​the second plate 44 to the total surface area of ​​the second portion 102 of the first plate 42 is in the range of 1:2.5 to 1:1. That is, at least 40% of the total surface area of ​​the second portion 102 is in contact with the second plate 44. This reduces offset. For example, the ratio of the mounting surface area of ​​the second plate 44 to the total surface area of ​​the second portion 102 of the first plate 42 can be in the range of 3:5 to 4:5. That is, 60% to 80% of the total surface area of ​​the second portion 102 is in contact with the second plate 44. The advantage of this range is a significant reduction in offset during emergency braking. Other advantages of this range include lower cost compared to other reinforcement concepts, such as thickening the first plate 42.

[0058] Figure 6 It is intercepted along line VI-VI. Figure 5 The cross-section of the brake backplate assembly 30 is shown. The first plate 42 includes a second portion 102 connected to the first portion 100 via a molding region 104. The molding region 104 extends from a first boundary 106 defined by the first portion 100 to a second boundary 108 defined by the second portion 102. Optionally, the molding region 104 may include a portion 150 that extends axially from the first boundary 106 defined by the first portion 100 in the first plane 140, through the second plane 142, and to an extension boundary 151 defined by a third portion 144 in the third plane 146.

[0059] The first portion 100 of the defining axle hole 46 of the first plate 42 lies in the first plane 140. The first plane 140 is shown as a line representing a first dimension; it should be understood that the second dimension of the first plane 140 is the in-page and out-of-page dimensions. The second portion 102 of the first plate 42 lies in the second plane 142, wherein the second plane 142 is parallel to the first plane 140. The term "parallel" means substantially parallel, wherein the first line or plane and the second line or plane extend such that a third line intersecting the first line or plane and the second line or plane can be drawn, wherein the angle between the third line and both the first and second lines is in the range of 80 degrees to 100 degrees.

[0060] The first plane 140 is spaced apart from the second plane 142 along the axial direction Ad. Similar to the first plane 140, the second plane 142 has a second dimension that allows the page to enter and exit.

[0061] The first plate 42 also includes a third portion 144 located in a third plane 146. The third plane 146 may be parallel to the first plane 140 or the second plane 142. The third plane 146 is axially spaced from the first plane 140 and the second plane 142. Similar to the first plane 140 and the second plane 142, the third plane 146 has a second dimension that extends into and out of the page.

[0062] The transition region 148 is defined as the portion of the first plate 42 that extends axially between the second portion 102 in the second plane 142 and the third portion 144 in the third plane 146. The forming region 104 includes a portion 150 that extends axially from the first portion 100 in the first plane 140 through the second plane 142 and into the third portion 144 in the third plane 146.

[0063] Figure 7 It was intercepted at line VII-VII. Figure 5A perspective view of the cross-section. The molding region 104 is defined as a portion of the first plate 42 extending from a first portion 100 in the first plane 140 to a second portion 102 in the second plane 142. As described above, the molding region 104 may include a portion 150 extending from the first portion 100 in the first plane 140 to a third portion 144 in the third plane 146.

[0064] The first plate 42, the second plate 44, and the third plate 54 are connected by anchor posts 38. The first plate 42 has a first thickness 152. The first thickness 152 can be measured at a second portion 102, where the first plate 42 contacts one of the second plate 44 and the third plate 54. As a non-limiting example, the first thickness 152 can be in the range of 0.14 inches to 0.18 inches (approximately 0.35 cm to 0.46 cm). For example, the first thickness 152 can be in the range of 0.1425 inches to 0.1565 inches (approximately 3.62 mm to 3.98 mm).

[0065] The second plate 44 has a second thickness 154. The second thickness 154 may be greater than the first thickness 152. Alternatively, the second thickness 154 may be equal to the first thickness 152.

[0066] The third plate 54 has a third thickness 156. The third thickness 156 may be equal to the first thickness 152. Alternatively, the third thickness 156 may be less than or greater than the first thickness 152.

[0067] During the design process and time-consuming iterations of the braking system described above, it was unexpectedly discovered that there was a certain relationship between the wing of the second plate and the protrusion of the first plate.

[0068] First, the inventors sought known solutions to strengthen the backplate (shown as the first plate). Increasing the thickness of the backplate would increase its strength and reduce its deflection during braking. However, this obvious solution increases the cost of the backplate and might require redesigning other components to accommodate a thicker backplate. Therefore, increasing the thickness of the backplate is not an ideal solution. This led the inventors to take a less obvious approach. The inventors modified the surface areas of the first and second portions; they increased the surface area of ​​the second portion by utilizing protrusions extending toward the wheel axle axis. The protrusions were carefully studied, and the final design improved the strength of the backplate without interfering with mounting the backplate to a standard-sized wheel axle brake flange using multiple mounting holes. Furthermore, the inventors modified the shape of the second plate and incorporated wings on it, wherein these wings extend toward the wheel axle axis via rounded noses. The precise ratio of the surface area of ​​the second portion of the first plate to the surface area of ​​the second plate provided unexpected results: the reduction in deflection was as much or more than that of a thicker backplate. The inventors further noted that modifying the surface area of ​​the third plate had significant advantages.

[0069] Therefore, the features and configuration of the brake backplate assembly disclosed herein offer the following advantages and technical effects, namely, reduced offset of the backplate or first plate when the braking system is actuated (even under emergency braking). Finite element analysis (FEA) shows that using the brake backplate assembly described herein results in a 42% reduction in offset compared to conventional or traditional designs. Emergency braking as used herein can refer to 12 volts at 30 MPH; the resulting braking torque is 10% of 30,000 in-pounds (approximately 3390 Nm).

[0070] Within the scope not yet described, different features and structures of the various aspects may be combined with each other as needed. The absence of a feature in all aspects does not imply that the feature cannot be shown in all aspects, but is merely for the sake of brevity. Therefore, features of different aspects may be combined and matched as needed to form new aspects, whether or not these new aspects are explicitly described. All combinations or arrangements of the various features described herein are covered by this disclosure.

[0071] This written description uses examples to disclose various aspects of this disclosure, including best practices, and also enables any person skilled in the art to practice various aspects of this disclosure, including making and using any apparatus or system and methods of performing any combination thereof. Although various aspects of this disclosure have been described in detail with reference to certain specific features of this disclosure, it should be understood that this is illustrative only and not limiting. Reasonable changes and modifications may be made within the scope of the foregoing disclosure and drawings without departing from the spirit of this disclosure as defined in the appended claims.

Claims

1. A brake backplate assembly, characterized in that, The brake backplate assembly includes: The first board includes: The wheel axle hole has a first diameter; A first portion, located in a first plane, defines the axle hole and a plurality of mounting holes circumferentially positioned around the axle hole, wherein each of the plurality of mounting holes has a second diameter; A circular boundary, coaxial with the axle hole and having a third diameter, wherein the third diameter is equal to the first diameter plus six times the second diameter; The second portion lies in a second plane parallel to the first plane, wherein the second plane includes at least two protrusions extending radially into the circular boundary; and A second plate is mounted to the first plate. The second plate includes a first wing and a second wing, wherein at least a portion of the first wing and at least a portion of the second wing extend into the circular boundary.

2. The brake backplate assembly according to claim 1, characterized in that, The circular boundary is a first circular boundary, and a second circular boundary is defined that is coaxial with the first circular boundary, wherein the second circular boundary has a fourth diameter that is smaller than the third diameter.

3. The brake backplate assembly according to claim 2, characterized in that, The fourth diameter is less than or equal to the first diameter plus four times the second diameter.

4. The brake backplate assembly according to claim 2, characterized in that, It also includes a forming region that extends at least between the first portion in the first plane and the second portion in the second plane, wherein at least a portion of the forming region extends radially into the second circular boundary.

5. The brake backplate assembly according to claim 1, characterized in that, The first plate also includes a third portion located in the third plane.

6. The brake backplate assembly according to claim 5, characterized in that, The transition region is defined as the portion of the first plate extending axially outward from the second portion in the second plane to the third portion in the third plane.

7. The brake backplate assembly according to claim 1, characterized in that, The second plate is mounted to the first plate by at least two fasteners.

8. The brake backplate assembly according to claim 1, characterized in that, The second part includes an inward surface and an outward surface, wherein the second plate is mounted to the outward surface to define the mounting surface area of ​​the second plate.

9. The brake backplate assembly according to claim 8, characterized in that, The ratio of the mounting surface area to the total surface area of ​​the second part is in the range of 1:2.5 to 1:

1.

10. The brake backplate assembly according to claim 8, characterized in that, It also includes a third plate, which is mounted to the inner surface of the second portion to define the mounting surface area of ​​the third plate.

11. The brake backplate assembly according to claim 10, characterized in that, The ratio of the mounting surface area of ​​the third plate to the mounting surface area of ​​the second plate is in the range of 1:5 to 1:

2.

12. The brake backplate assembly according to claim 1, characterized in that, Each of the at least two protrusions includes a plate nose, wherein the plate nose has a radius of curvature in the range of 0.5 inches to 1.25 inches.

13. The brake backplate assembly according to claim 12, characterized in that, The first wing or the second wing includes a nose, wherein the nose has a radius of curvature in the range of 0.5 inches to 1.25 inches.

14. The brake backplate assembly according to claim 1, characterized in that, The first plate has a first thickness, and the second plate has a second thickness, wherein the second thickness is greater than the first thickness.

15. The brake backplate assembly according to claim 1, characterized in that, It also includes a third plate, which is mounted to the inner surface of the first plate, and wherein the second plate is mounted to the outer surface of the first plate.

16. The brake backplate assembly according to claim 1, characterized in that, It also includes at least two rivets that extend through and connect the second portion of the first plate, the second plate, and the third plate.

17. The brake backplate assembly according to claim 1, characterized in that, The first plate includes a forming region, which is defined as a portion of the first plate extending from a first portion in the first plane to a second portion in the second plane.

18. The brake backplate assembly according to claim 17, characterized in that, The axle hole defines the axle axis, and at least a portion of the shaped area of ​​the first plate is located within 2 inches or less from the axle axis.

19. The brake backplate assembly according to claim 1, characterized in that, The plurality of mounting holes includes five mounting holes, and the brake backplate assembly is used for a 12-inch × 2-inch brake system.

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