Friction ring and brake disc

Abstract

The utility model discloses a friction ring and a brake disc. The friction ring comprises a main body and an auxiliary body which are made of different materials, the main body is annular and comprises a first face located on one side of the thickness direction of the main body and a plurality of containing grooves formed in the first face and distributed at intervals in the circumferential direction of the friction ring, and the auxiliary body comprises a plurality of block bodies contained in the containing grooves respectively. The containing groove penetrates to the inner circumferential face and / or the outer circumferential face of the main body, and the main body and the auxiliary body are matched in the mode that at least the auxiliary body cannot move in the radial direction of the friction ring relative to the main body. According to the friction ring, under the condition that the containing groove penetrates through the inner circumferential face and / or the outer circumferential face of the main body, the auxiliary body is reliably connected to the main body through the matching structure between the main body and the block body, and the main body and the auxiliary body can be made of different materials according to needs, so that the situation that the whole friction ring is made of expensive wear-resistant materials is avoided; and the production cost and the manufacturing difficulty of the friction ring are reduced.

Description

Technical Field

[0001] This utility model relates to the field of vehicle braking technology, and in particular to a friction ring and a brake disc. Background Technology

[0002] The brake disc is an important component of the braking system of rail vehicles. When a rail vehicle brakes, the caliper brake clamps the brake disc to decelerate or stop the vehicle. The brake disc includes two friction rings located on both sides of the wheel. During braking, the friction rings make contact with the brake pads of the caliper brake.

[0003] Existing wear-resistant friction rings are generally made of relatively expensive wear-resistant materials, resulting in high costs and significant manufacturing difficulties. Utility Model Content

[0004] The purpose of this invention is to provide a friction ring that is low in cost and easy to manufacture, as well as a brake disc including the friction ring.

[0005] To achieve the above objectives, this utility model provides a friction ring, which includes a main body and a secondary body made of different materials. The main body is annular and includes a first surface located on one side of its thickness direction, and a plurality of receiving grooves spaced apart along the circumferential direction of the friction ring. The secondary body includes a plurality of blocks respectively received in the plurality of receiving grooves. The receiving grooves extend to the inner circumferential surface and / or the outer circumferential surface of the main body. The main body and the secondary body cooperate to at least prevent the secondary body from moving relative to the main body in the radial direction of the friction ring.

[0006] As a further improvement of this utility model, the two side walls on the main body located on both sides of the width direction of any of the receiving slots are respectively the first slot side wall and the second slot side wall of the receiving slot. The block contacts the first slot side wall and the second slot side wall of the receiving slot in which it is located. The multiple blocks are arranged radially on the main body. The sub-body also includes an annular body connecting the multiple blocks. The sub-body includes at least four blocks.

[0007] As a further improvement of this utility model, the shape of the block matches the shape of the receiving groove, and the width of the receiving groove is smaller the closer it is to the center of the friction ring along the radial direction of the friction ring;

[0008] The receiving groove extends through the inner circumferential surface of the main body, and the main body also includes a limiting part, which is located on the side of the receiving groove away from the center of the friction ring in the radial direction of the friction ring.

[0009] As a further improvement of this utility model, the main body includes a base portion and a plurality of protrusions formed from the base portion. The plurality of protrusions extend along the radial direction of the friction ring and are arranged at intervals along the circumferential direction of the friction ring. The receiving groove is formed between two adjacent protrusions.

[0010] The receiving groove extends through the inner and outer circumferential surfaces of the main body, and the interface between the block and the protrusion is non-planar.

[0011] As a further improvement of this utility model, the protrusion includes a first extension and a second extension arranged at intervals along the radial direction of the friction ring, and a positioning portion located between the first extension and the second extension, wherein the width of the first extension and the second extension are both smaller than the width of the positioning portion.

[0012] As a further improvement of this utility model, the interface between the block and the protrusion is wavy.

[0013] As a further improvement of this utility model, the main body includes a bottom wall of the receiving groove located on one side of the thickness direction, a limiting groove formed by recessing from the bottom wall of the receiving groove, and the block includes a block body received in the receiving groove and an insertion part connected to the block body and inserted into the limiting groove.

[0014] As a further improvement of this utility model, the first surface is located on the front side of the main body, and the main body also includes a back side located on a different side from the front side in its thickness direction. The two side walls on the main body located on both sides of any of the receiving slots are the first slot side wall and the second slot side wall of the receiving slot. In the direction from the back side to the front side, the distance between the first slot side wall and the second slot side wall of the same receiving slot gradually decreases. The shape of the block matches the shape of the receiving slot.

[0015] As a further improvement of this utility model, the block includes a second surface located on one side of its thickness direction, and the second surfaces of the plurality of blocks are in the same plane as the first surface.

[0016] As a further improvement of this utility model, the total area of ​​the plurality of second surfaces is area P, and the total area of ​​the first surface and the plurality of second surfaces is area S, with the ratio of area P to area S being 40% to 98%.

[0017] As a further improvement of this utility model, the wear resistance of the sub-body is greater than that of the main body, and the stability of the friction coefficient of the sub-body is better than that of the friction coefficient of the main body.

[0018] This utility model also provides a brake disc, which includes two friction rings as described above and a connecting structure for connecting the two friction rings to both sides of the wheel respectively.

[0019] Beneficial effects:

[0020] In the friction ring and brake disc provided by this utility model, when the receiving groove extends to the inner and / or outer circumferential surfaces of the main body, the auxiliary body is reliably connected to the main body through the mating structure between the main body and the block. Furthermore, the main body and the auxiliary body can be made of different materials as needed, which avoids the friction ring being made entirely of expensive wear-resistant materials, thereby reducing the production cost and manufacturing difficulty of the friction ring. Attached Figure Description

[0021] Figure 1 A three-dimensional sectional view of a brake disc and wheel in the prior art;

[0022] Figure 2 This is a schematic diagram of the friction ring provided in the first embodiment of the present invention, wherein the friction ring does not have a through hole;

[0023] Figure 3 for Figure 1 Schematic diagram of the subbody structure;

[0024] Figure 4 for Figure 2 A magnified diagram of point A in the middle;

[0025] Figure 5 This is a schematic diagram of the structure of the friction ring provided in the first embodiment of the present invention, wherein the friction ring has a through hole;

[0026] Figure 6 for Figure 5 A schematic diagram of the friction ring in the image from another angle;

[0027] Figure 7 This is a perspective sectional view of a friction ring provided in the second embodiment of the present invention, wherein no through holes are provided on the friction ring;

[0028] Figure 8 This is a schematic diagram of the structure of the sub-body provided in the second embodiment of the present utility model;

[0029] Figure 9 for Figure 7 A schematic diagram of the large prescription after taking the Chinese medicine B prescription;

[0030] Figure 10 This is a perspective sectional view of a friction ring provided in the second embodiment of the present invention, wherein a through hole is provided on the friction ring;

[0031] Figure 11This is a perspective sectional view of a friction ring provided in the third embodiment of the present invention, wherein a through hole is provided on the friction ring;

[0032] Figure 12 This is a perspective sectional view of the friction ring provided in the fourth embodiment of the present invention, wherein the friction ring does not have a through hole;

[0033] Figure 13 This is a schematic diagram of the structure of the sub-body provided in the fourth embodiment of the present invention;

[0034] Figure 14 for Figure 12 A magnified diagram of point C in the middle;

[0035] Figure 15 This is a perspective sectional view of a friction ring provided in the fourth embodiment of the present invention, wherein a through hole is provided on the friction ring;

[0036] Figure 16 This is a perspective sectional view of the friction ring provided in the fifth embodiment of the present invention, wherein the friction ring does not have a through hole;

[0037] Figure 17 This is a schematic diagram of the structure of the sub-body provided in the fifth embodiment of the present utility model;

[0038] Figure 18 for Figure 16 A magnified diagram of point D in the middle;

[0039] Figure 19 This is a perspective sectional view of a friction ring provided in the fifth embodiment of the present invention, wherein a through hole is provided on the friction ring;

[0040] Figure 20 for Figure 19 A magnified diagram of the structure in the lower right corner;

[0041] Figure 21 This is a perspective sectional view of the friction ring provided in the sixth embodiment of the present invention, wherein the friction ring does not have a through hole;

[0042] Figure 22 This is a schematic diagram of the structure of the auxiliary body provided in the sixth embodiment of the present utility model;

[0043] Figure 23 for Figure 21 A magnified diagram of point E in the middle;

[0044] Figure 24 for Figure 21 The enlarged illustration in the bottom right corner;

[0045] Figure 25This is a three-dimensional sectional view of a friction ring provided in the sixth embodiment of the present invention, wherein a through hole is provided on the friction ring. Detailed Implementation

[0046] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any modifications to the mechanism, method, or function made by those skilled in the art based on these embodiments are included within the protection scope of the present invention.

[0047] The terms used herein, such as "up," "down," "left," "right," "front," and "back," indicating spatial relative position, are for illustrative purposes to describe the relationship of one feature relative to another, as shown in the accompanying drawings. It is understood that, depending on the product's placement, these terms may be intended to include different orientations besides those shown in the figures, and should not be construed as limiting the claims. Furthermore, the descriptive term "horizontal" used herein is not entirely equivalent to being perpendicular to the direction of gravity, and allows for a certain angle of inclination.

[0048] like Figure 1 As shown, the existing brake disc 200 is connected to the wheel 201 of the rail vehicle, and includes two friction rings 100 and a connection structure for connecting the two friction rings 100 to both sides of the wheel 201 respectively.

[0049] The connection structure includes fasteners and through holes opened on the friction rings 100. Each friction ring 100 has multiple through holes, and the multiple through holes on the two friction rings 100 are set one-to-one. The fasteners connect the two friction rings 100 to the two sides of the wheel 201 respectively through the through holes on the two friction rings 100.

[0050] The brake disc 200 is used in the braking system of a rail vehicle. The wheel 201 is connected to the axle of the rail vehicle. When the rail vehicle needs to decelerate and stop, the caliper brake in the braking system clamps the brake disc 200, so that the brake pads on the caliper brake and the friction ring 100 generate friction, thereby braking the wheel.

[0051] like Figure 2-4 As shown, the first embodiment of this utility model provides a friction ring 100. The friction ring 100 includes a main body 10 and a secondary body 20 made of different materials. The main body 10 is annular and includes a first surface 11 located on one side of its thickness direction and a plurality of receiving grooves 12 arranged at intervals along the circumferential direction of the friction ring 100 on the first surface 11. The secondary body 20 includes a plurality of blocks 21 respectively received in the plurality of receiving grooves 12.

[0052] The receiving groove 12 extends through the inner and / or outer peripheral surfaces of the main body 10, thus the receiving groove 12 is open on the side near the center of the friction ring 100 and / or on the side away from the center of the friction ring 100. To prevent the block 21 from dislodging from the receiving groove 12 along the radial direction of the friction ring 100, in this embodiment, the main body 10 and the sub-body 20 are configured such that the sub-body 20 cannot move relative to the main body 10 along the radial direction of the friction ring 100.

[0053] The above-mentioned "the main body 10 and the auxiliary body 20 are coordinated such that the auxiliary body 20 cannot move relative to the main body 10 in the radial direction of the friction ring 100" should be understood as: there is a coordination structure between the main body 10 and the auxiliary body 20 that allows them to cooperate, and under the restriction of this coordination structure, the auxiliary body 20 cannot move relative to the main body 10 in the radial direction of the friction ring 100.

[0054] In this embodiment, when the receiving groove 12 extends to the inner and / or outer circumferential surfaces of the main body 10, the sub-body 20 is reliably connected to the main body 10 through the mating structure between the main body 10 and the sub-body 20. Furthermore, the main body 10 and the sub-body 20 can be made of different materials as needed, which avoids the friction ring 100 being made entirely of expensive wear-resistant materials, thereby reducing the production cost and manufacturing difficulty of the friction ring 100.

[0055] In this embodiment, the two side walls on the main body 10 located on both sides of the width direction of any receiving groove 12 are respectively the first groove side wall 122 and the second groove side wall 123 of the receiving groove 12. When the block 21 contacts the first groove side wall 122 and the second groove side wall 123 of the receiving groove 12, the block 21 cannot move along the width direction of the receiving groove 12 due to the restriction of the first groove side wall 122 and the second groove side wall 123.

[0056] Multiple blocks 21 are arranged radially on the main body 10, and the sub-body 20 also includes an annular body 22 connecting the multiple blocks 21. The multiple blocks 21 are arranged radially on the main body 10, meaning that each block 21 extends along the radial direction of the main body 10 (the straight line connecting the center of the main body 10 and the circumference of the main body 10). It is conceivable that, in addition to the multiple blocks 21 being arranged radially on the main body 10, multiple receiving slots 12 are also arranged radially on the main body 10.

[0057] Within the receiving groove 12, block 21 can only move along the radial direction of the main body 10. Since the annular body 22 connects multiple blocks 21, the multiple blocks 21 can only move synchronously. In this case, when the sub-body 20 includes at least four blocks 21, the entire sub-body 20 cannot move relative to the main body 10 along the radial direction of the friction ring 100, thereby effectively defining the relative position between the sub-body 20 and the main body 10. In this embodiment, the multiple blocks 21 are evenly arranged along the circumferential direction of the main body 10, and the specific number of blocks 21 is 12.

[0058] It is conceivable that, in order to prevent the entire sub-body 20 from moving relative to the main body 10 along the radial direction of the friction ring 100, the number and arrangement direction of the aforementioned blocks 21 can be designed differently. For example, the multiple blocks 21 may include at least a first block, a second block, and a third block arranged in sequence. When the extension directions of the first block and the third block are asymmetrical relative to the extension direction of the second block, the sub-body 20 cannot move relative to the main body 10 along the radial direction of the friction ring 100.

[0059] It should be noted that in this embodiment, the receiving groove 12 extends through the inner and outer circumferential surfaces of the main body 10. The side of the receiving groove 12 near the center of the friction ring 100 and the side away from the center of the friction ring 100 are both open. However, as described above, when the annular body 22 connects at least four blocks 21 arranged radially on the main body 10, the sub-body 20 cannot move relative to the main body 10 in the radial direction of the friction ring 100. Therefore, even if the receiving groove 12 extends through the inner and outer circumferential surfaces of the main body 10, the blocks 21 will not detach from the receiving groove 12.

[0060] In this embodiment, the receiving groove 12 is fan-shaped. Along the radial direction of the friction ring 100, the closer to the center of the friction ring 100, the smaller the width of the receiving groove 12; conversely, the farther away from the center of the friction ring 100, the larger the width of the receiving groove 12. The shape of the block 21 matches the shape of the receiving groove 12, that is, along the radial direction of the friction ring 100, the closer to the center of the friction ring 100, the smaller the width of the block 21. Thus, under the constraint of the receiving groove 12, the block 21 cannot move towards the center of the friction ring 100 along the radial direction of the friction ring 100, further restricting the position of the block 21 relative to the main body 10.

[0061] In this embodiment, when the friction ring 100 is in use, the position where it contacts and rubs with the brake pads of the clamp brake is the side of the annular body 22 away from the main body 10. The side of the annular body 22 away from the main body 10 is an annular plane. Multiple blocks 21 cooperate with multiple receiving grooves 12 to connect the main body 10 and the sub-body 20.

[0062] Since the annular body 22 is the part of the friction ring 100 that contacts the clamp brake during operation, in this embodiment, the secondary body 20 is made of a material that is more wear-resistant and has better friction stability than the main body 10. That is, the wear resistance of the secondary body 20 is greater than that of the main body 10, and the stability of the friction coefficient of the secondary body 20 is better than the stability of the friction coefficient of the main body 10.

[0063] It should be noted that the stability of the friction coefficient refers to the ability of the material to maintain a stable friction coefficient under different environmental conditions (such as different temperatures and different humidities). The better the stability of the material's friction coefficient, the smaller the change range of its friction coefficient under different environmental conditions. Conversely, the worse the stability of the material's friction coefficient, the greater the change range of its friction coefficient under different environmental conditions.

[0064] Specifically, the secondary body 20 can be made of an aluminum-based composite material with a high SiC content to have good wear resistance. The main body 10 can be made of an aluminum alloy material to reduce the overall weight of the friction ring 100, or it can also be made of a steel material to have good mechanical properties.

[0065] In this embodiment, the first surface 11 is located on the front of the main body 10. The main body 10 further includes a back surface on the opposite side of its front surface in the thickness direction, that is, one side of the main body 10 in the thickness direction is the front surface, and the other side is the back surface.

[0066] In the direction from the back surface towards the front surface, the distance between the first groove side wall 122 and the second groove side wall 123 of the same receiving groove 12 gradually decreases. Thus, the receiving groove 12 is a燕尾槽 (swallowtail groove), and its cross-section is trapezoidal. The shape of the block 21 matches the shape of the receiving groove 12, and the cross-section of the block 21 is also trapezoidal. With the above arrangement, it is ensured that the block 21 cannot脱离 the main body 10 in the thickness direction of the main body 10, further defining the relative position between the main body 10 and the secondary body 20.

[0067] It can be imagined that to ensure that the block 21 cannot脱离 the main body 10 in the thickness direction of the main body, the cross-section of the receiving groove 12 can also be in other shapes, such as the cross-section of the receiving groove 12 can also be大致呈 “凸” 字形 (roughly in the shape of a "convex").

[0068] The main body 10 includes a base portion 14 and a plurality of protruding portions 15 protruding from the base portion 14. The plurality of protruding portions 15 extend in the radial direction of the friction ring 100 and are arranged at intervals in the circumferential direction of the friction ring 100. The receiving groove 12 is formed between two adjacent protruding portions 15, and the plurality of blocks 21 and the plurality of protruding portions 15 are arranged alternately.

[0069] Such as Figure 5-6As shown, in order to enable the friction ring 100 to be connected to the wheel 201, the friction ring 100 is also provided with a plurality of through holes 30. In this embodiment, the plurality of through holes 30 are opened from the side of the annular body 22 away from the main body 10. Each through hole 30 includes a first hole segment 31 located in the sub-body 20 and a second hole segment 32 located in the main body 10.

[0070] The friction ring 100 and the wheel 201 are connected by bolts. The through hole 30 is a countersunk hole to prevent the head of the bolt from extending beyond the side of the ring body 22 away from the main body 10.

[0071] like Figure 7-9 As shown, the second embodiment of this utility model provides a friction ring 100. In the second embodiment, the shape of the block 21 matches the shape of the receiving groove 12. The receiving groove 12 is fan-shaped. Along the radial direction of the friction ring 100, the closer to the center of the friction ring 100, the smaller the width of the receiving groove 12. Under the restriction of the receiving groove 12, the block 21 cannot move towards the center of the friction ring 100 along the radial direction of the friction ring 100.

[0072] Unlike the first embodiment, in the second embodiment, the sub-body 20 does not include the annular body 22, the receiving groove 12 extends through to the inner circumferential surface of the main body 10, and the main body 10 also includes a limiting part 13, which is located on the side of the receiving groove 12 away from the center of the friction ring 100 in the radial direction of the friction ring 100. The limiting part 13 is used to restrict the block 21 from moving in a direction away from the center of the friction ring 100.

[0073] As explained above, because the receiving groove 12 is fan-shaped, the block 21 cannot move towards the center of the friction ring 100 in the radial direction. Furthermore, with the addition of the limiting part 13, the position of the block 21 relative to the main body 10 in the radial direction of the friction ring 100 is fixed. Specifically, the limiting part 13 can connect to two adjacent protrusions 15.

[0074] In other embodiments, it is conceivable that the following design could be made: along the radial direction of the friction ring 100, the width of the receiving groove 12 increases as it approaches the center of the friction ring 100, the receiving groove 12 extends to the outer peripheral surface of the main body 10, and the limiting part 13 is located on the side of the receiving groove 12 near the center of the friction ring 100 in the radial direction of the friction ring 100. In this way, the block 21 cannot move relative to the main body 10 along the radial direction of the friction ring 100.

[0075] The block 21 includes a second surface 23 located on one side of its thickness direction. The second surfaces 23 of the multiple blocks 21 and the first surface 11 are on the same plane, that is, the second surfaces 23 of the multiple blocks 21 and the first surface 11 are flush. When the friction ring 100 is in use, the first surface 11 and the multiple second surfaces 23 jointly contact the brake pads of the caliper brake, which is equivalent to the working surface of the friction ring 100.

[0076] In other embodiments of this invention, the thickness of the block 21 may be greater than the thickness of the receiving groove 12, thereby making the second surface 23 higher than the first surface 11. With this design, when the friction ring 100 is in operation, the brake pads of the clamp brake only contact the second surface 23.

[0077] In this embodiment, the sum of the areas of the multiple second surfaces 23 is denoted as area P, and the sum of the areas of the first surface 11 and the multiple second surfaces 23 is denoted as area S. The ratio of area P to area S is 40% to 98%. It should be noted that since the first surface 11 has multiple receiving slots 12, the aforementioned "area of ​​the first surface 11" refers to the actual area of ​​the first surface 11, excluding the portion "removed" by the receiving slots 12.

[0078] Theoretically, the higher the ratio of area P to area S, the better the wear resistance of the friction ring 100. However, considering that a higher ratio of area P to area S requires more material for the block 21, which increases the manufacturing cost of the friction ring 100, the ratio of area P to area S can be a moderate value. For example, in this embodiment, the ratio of area P to area S is 45% to 55%.

[0079] In this embodiment, as Figure 10 As shown, since the second surface 23 has a small proportion, multiple through holes 30 for connecting the friction ring 100 to the wheel 201 are opened on the first surface 11 of the body 10 and pass through the entire body 10.

[0080] Except for the technical content that differs from the first embodiment as described above, the rest of the technical content in this embodiment is the same as that in the first embodiment, so it will not be repeated here.

[0081] To maximize the wear resistance of the friction ring 100, the ratio of area P to area S should be set as high as possible. For example... Figure 11 As shown, the third embodiment of this utility model provides a friction ring 100. The difference between the third embodiment and the second embodiment is that in the third embodiment, the ratio of area P to area S can reach more than 90%.

[0082] In the third embodiment, the through hole 30 for connecting the friction ring 100 to the wheel 201 passes through two adjacent blocks 21 and the protrusion 15 located between the two adjacent blocks 21.

[0083] Except for the technical content that differs from the second embodiment as described above, the rest of the technical content in this embodiment is the same as that in the second embodiment, so it will not be repeated here.

[0084] like Figure 12-14As shown, the fourth embodiment of this utility model provides a friction ring 100. In the fourth embodiment, the same as the second embodiment described above, the main body 10 includes a base portion 14 and a plurality of protrusions 15 formed from the base portion 14. The plurality of protrusions 15 extend along the radial direction of the friction ring 100 and are arranged at intervals along the circumferential direction of the friction ring 100. A receiving groove 12 is formed between two adjacent protrusions 15.

[0085] Unlike the second embodiment described above, in the fourth embodiment, the interface F between the block 21 and the protrusion 15 is non-planar. As a result, the block 21 cannot move relative to the main body 10 in the radial direction of the friction ring 100 due to the restriction of the protrusion 15.

[0086] In this embodiment, the receiving groove 12 extends through the inner and outer peripheral surfaces of the main body 10. The receiving groove 12 is open on both the side near the center of the friction ring 100 and the side away from the center of the friction ring 100. However, as described above, the block 21 cannot move relative to the main body 10 in the radial direction of the friction ring 100 due to the restriction of the protrusion 15. Therefore, even if the receiving groove 12 is open on both sides, the block 21 cannot detach from the receiving groove 12 in the radial direction of the friction ring 100.

[0087] Specifically, the protrusion 15 includes a first extension 151 and a second extension 152 arranged at intervals along the radial direction of the friction ring 100, and a positioning portion 153 located between the first extension 151 and the second extension 152, wherein the width of the first extension 151 and the width of the second extension 152 are both smaller than the width of the positioning portion 153.

[0088] As can be seen, with the above configuration, the interface F between the block 21 and the protrusion 15 includes two planes and one curved surface; the interface F as a whole is not a single plane. Under the action of the positioning part 153, the block 21 cannot move relative to the main body 10 in the radial direction of the friction ring 100.

[0089] The aforementioned positioning part 153 is circular, which is perfectly suited for creating the through hole 30. For example... Figure 15 As shown, in this embodiment, the through hole 30 for connecting the friction ring 100 to the wheel 201 passes through the positioning part 153 and the base part 14 of the main body 10.

[0090] Except for the technical content that differs from the second embodiment as described above, the rest of the technical content in this embodiment is the same as that in the second embodiment, so it will not be repeated here.

[0091] like Figure 16-18As shown, the fifth embodiment of this utility model provides a friction ring 100. The difference between the fifth embodiment and the fourth embodiment is that, in the fifth embodiment, the interface F between the block 21 and the protrusion 15 is wavy. Since the protrusion 15 is located between the two blocks 21, the protrusion 15 is also wavy.

[0092] With the above configuration, the block 21 cannot move relative to the main body 10 in the radial direction of the friction ring 100 under the action of the wavy protrusion 15.

[0093] like Figures 19-20 As shown, in this embodiment, multiple blocks 21 are provided with positioning holes 213, and the base part 14 of the main body 10 is connected with multiple positioning protrusions 18 that match the multiple positioning holes 213 respectively. The positioning holes 213 and the positioning protrusions 18 cooperate to limit the position of the blocks 21, so that the blocks 21 cannot move in the radial direction of the friction ring 100.

[0094] In this embodiment, the through hole 30 for connecting the friction ring 100 to the wheel 201 passes through the positioning protrusion 18 and the base portion 14 of the main body 10.

[0095] Except for the technical content that differs from the second embodiment as described above, the rest of the technical content in this embodiment is the same as that in the second embodiment, so it will not be repeated here.

[0096] In the fourth and fifth embodiments, the interface F between the block 21 and the protrusion 15 is non-planar, thus the boundary line L between the second surface 23 on the block 21 and the first surface 11 on the protrusion 15 is non-linear. With this design, a transition region exists between adjacent first surfaces 11 and second surfaces 23, comprising a portion of the first surface 11 and a portion of the second surface 23 overlapping along the radial direction of the friction ring 100. When the friction ring 100 contacts and rubs against the brake pad, the portion of the friction ring 100 in contact with the brake pad does not abruptly transition from the first surface 11 to the second surface 23, but rather smoothly transitions from the first surface 11 to the second surface 23 through the transition region comprising a portion of the first surface 11 and a portion of the second surface 23.

[0097] As described above, the main body 10 and the block 21 are made of different materials. Therefore, the frictional force generated by the brake pad contacting the first surface 11 and the frictional force generated by contacting the second surface 23 are different. If the part of the friction ring 100 that contacts the brake pad abruptly transitions from the first surface 11 to the second surface 23, it is detrimental to the frictional stability between the brake pad and the friction ring 100, thus affecting the performance of the friction ring 100. By making the boundary line L between adjacent first surfaces 11 and second surfaces 23 non-linear, a transition area exists between adjacent first surfaces 11 and second surfaces 23. As a result, the part of the friction ring 100 that contacts the brake pad can smoothly transition from the first surface 11 to the second surface 23, which is beneficial to the frictional stability between the brake pad and the friction ring 100 and ensures the performance of the friction ring 100.

[0098] like Figure 21-25 As shown, the sixth embodiment of this utility model provides a friction ring 100. In the sixth embodiment, the main body 10 includes a bottom wall 121 located on one side of the thickness direction of the receiving groove 12 and a limiting groove 16 formed by recessing from the bottom wall 121. The block 21 includes a block body 211 received in the receiving groove 12 and an insertion part 212 connected to the block body 211 and inserted into the limiting groove 16.

[0099] When the insertion part 212 is inserted into the limiting groove 16, the block 21 cannot move relative to the main body 10 in the radial direction of the friction ring 100, and the position between the block 21 and the main body 10 can be limited. In this embodiment, the receiving groove 12 extends through the inner and outer peripheral surfaces of the main body 10.

[0100] In this embodiment, a through hole 30 for connecting the friction ring 100 to the wheel 201 is formed on the block 21 and passes through the insertion part 212.

[0101] Except for the technical content that differs from the second embodiment as described above, the rest of the technical content in this embodiment is the same as that in the second embodiment, so it will not be repeated here.

[0102] The friction ring 100 provided in the above embodiment is manufactured through the following steps:

[0103] Create 20 secondary bodies;

[0104] A mold is provided, in which a cavity is formed that matches the shape of the main body 10;

[0105] Place the sub-body 20 at the preset position inside the cavity;

[0106] The liquid material of the main body 10 is injected into the cavity, and then the material of the main body 10 is allowed to cool and solidify.

[0107] In the above steps, a secondary body 20 is first manufactured (in the first embodiment, the secondary body 20 includes multiple blocks 21 and an annular body 22; in the second to sixth embodiments, it includes multiple blocks 21, which cooperate with the main body 10 so that the blocks 21 cannot move relative to the main body 100 in the radial direction of the friction ring 100). Then, the secondary body 20 is placed into the cavity of the mold. Afterward, liquid material of the main body 10 is injected into the cavity. After the material of the main body 10 cools, its shape is fixed. Because the secondary body 20 was placed in the cavity beforehand, the manufactured main body 10 can cover the secondary body 20. After cooling, the main body 10 forms a receiving groove 12 that matches the shape of the blocks 21. By using the above steps to manufacture the friction ring 100, the main body 10 and secondary body 20 of different materials can be effectively combined to form the friction ring 100.

[0108] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0109] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application.

Claims

1. A friction ring, characterized in that, The device includes a main body and a sub-body made of different materials. The main body is annular and includes a first surface located on one side of its thickness direction, and a plurality of receiving grooves spaced apart along the circumferential direction of the friction ring. The sub-body includes a plurality of blocks respectively received in the plurality of receiving grooves. The receiving grooves extend to the inner circumferential surface and / or the outer circumferential surface of the main body. The main body and the sub-body are configured such that the sub-body cannot move relative to the main body in the radial direction of the friction ring.

2. The friction ring according to claim 1, characterized in that, The two side walls on either side of the width direction of any of the receiving slots on the main body are respectively the first slot side wall and the second slot side wall of the receiving slot. The block contacts the first slot side wall and the second slot side wall of the receiving slot in which it is located. Multiple blocks are arranged radially on the main body. The sub-body also includes an annular body connecting multiple blocks. The sub-body includes at least four blocks.

3. The friction ring according to claim 1, characterized in that, The shape of the block matches the shape of the receiving groove, and the width of the receiving groove is smaller the closer it is to the center of the friction ring along the radial direction of the friction ring. The receiving groove extends through the inner circumferential surface of the main body, and the main body also includes a limiting part, which is located on the side of the receiving groove away from the center of the friction ring in the radial direction of the friction ring.

4. The friction ring according to claim 1, characterized in that, The main body includes a base portion and a plurality of protrusions formed from the base portion. The plurality of protrusions extend along the radial direction of the friction ring and are spaced apart along the circumferential direction of the friction ring. The receiving groove is formed between two adjacent protrusions. The receiving groove extends through the inner and outer circumferential surfaces of the main body, and the interface between the block and the protrusion is non-planar.

5. The friction ring according to claim 4, characterized in that, The protrusion includes a first extension and a second extension spaced apart along the radial direction of the friction ring, and a positioning portion located between the first extension and the second extension. The widths of the first extension and the second extension are both smaller than the width of the positioning portion.

6. The friction ring according to claim 4, characterized in that, The interface between the block and the protrusion is wavy.

7. The friction ring according to claim 4, characterized in that, The main body includes a bottom wall of the receiving groove located on one side of the thickness direction, and a limiting groove formed by recessing from the bottom wall of the receiving groove. The block includes a block body received in the receiving groove and an insertion part connected to the block body and inserted into the limiting groove.

8. The friction ring according to claim 1, characterized in that, The first surface is located on the front side of the main body, and the main body also includes a back side located on a different side from the front side in its thickness direction. The two side walls on the main body located on either side of any of the receiving slots are the first slot side wall and the second slot side wall of the receiving slot. In the direction from the back side to the front side, the distance between the first slot side wall and the second slot side wall of the same receiving slot gradually decreases. The shape of the block matches the shape of the receiving slot.

9. The friction ring according to any one of claims 3-7, characterized in that, The block includes a second surface located on one side of its thickness direction, and the second surfaces of the plurality of blocks are in the same plane as the first surface.

10. The friction ring according to claim 9, characterized in that, The sum of the areas of the multiple second faces is area P, and the sum of the areas of the first face and the multiple second faces is area S. The ratio of area P to area S is 40% to 98%.

11. The friction ring according to claim 1, characterized in that, The wear resistance of the sub-body is greater than that of the main body, and the stability of the friction coefficient of the sub-body is better than that of the friction coefficient of the main body.

12. A brake disc, characterized in that, It includes two friction rings as described in any one of claims 1-11 above, and a connecting structure for connecting the two friction rings to both sides of the wheel respectively.

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