Friction disc and brake with same

Abstract

The utility model provides a friction disc and a brake with the same, and belongs to the technical field of brakes, the friction disc comprises a disc body and a convex ring arranged at a first shaft end of the disc body, the disc body is provided with a through middle hole and a friction surface used for friction braking, the middle hole is coated with grease and is matched with a shaft sleeve or a transmission shaft, and the convex ring is arranged at a second shaft end of the disc body. The convex ring surrounds the periphery of the middle hole and is spaced from the inner wall of the middle hole; the friction faces are located on the two end faces of the disc body, the friction faces and the protruding ring protrude out of the end faces of the disc body, the friction faces are located on the outer circle of the protruding ring at intervals, and the protruding height of the friction faces is smaller than or equal to the protruding height of the protruding ring. The brake is provided with the friction disc. According to the friction disc and the brake with the friction disc, the gap between the friction disc and the shaft sleeve is reduced by coating the middle hole with the grease, and therefore collision noise is reduced; by arranging the convex ring, grease is prevented from entering the friction surface, and normal work of the brake is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of brakes, and in particular relates to a friction disc and a brake having the same. Background Art

[0002] The friction disc in the brake is connected to the drive shaft of the equipment through a sleeve. During normal operation, the friction disc, sleeve and drive shaft rotate synchronously. When braking, the armature is released and drives the friction disc to squeeze the tail plate. The friction disc is squeezed between the armature and the tail plate, and thus stops due to friction resistance. Then the sleeve and drive shaft connected to the friction disc also stop rotating.

[0003] When the transmission shaft drives the friction disc to rotate, the friction disc will shake due to the gap between the inner ring of the friction disc and the sleeve, resulting in axial runout of the friction disc when rotating. When the brake is engaged, the gap between the armature and the tail plate increases, and the space for the friction disc to move in the axial direction also increases. The shaking of the friction disc will also increase, causing the friction disc to rub against the armature and the tail plate, generating friction noise; the friction disc will lag in rotation relative to the sleeve or transmission shaft, and the inner ring of the friction disc and the sleeve or the outer ring of the transmission shaft have a gap, so the two collide and produce noise. Utility Model Content

[0004] The embodiment of the utility model provides a friction disc and a brake having the same, aiming to solve the technical problem of high friction noise during operation of the existing brake.

[0005] In the first aspect, an embodiment of the present invention provides a friction disc, comprising a disc body and a convex ring provided at the first axial end of the disc body, the disc body having a through-hole and a friction surface for friction braking, the hole being coated with grease and cooperating with a bushing or a transmission shaft, the convex ring surrounding the outer periphery of the hole and spaced from the inner wall of the hole; the friction surface being located at both end surfaces of the disc body, the friction surface and the convex ring both protrude from the end surface of the disc body, the friction surface spaced at the outer ring of the convex ring, and the protruding height of the friction surface being less than or equal to the protruding height of the convex ring.

[0006] In combination with the first aspect, in a possible implementation, a boss is provided at the second axial end of the disc body, the second axial end is the opposite end of the first axial end, the protruding height of the boss is greater than the protruding height of the friction surface, and the center hole passes through the boss.

[0007] In combination with the first aspect, in a possible implementation, a plurality of the convex rings are provided, the plurality of the convex rings are spaced apart from the inside to the outside, and the inner diameters of the plurality of the convex rings increase sequentially.

[0008] In combination with the first aspect, in a possible implementation, the second axial end of the disk body is also provided with a convex ring, the second axial end is the opposite end of the first axial end, the convex ring located at the second axial end is located at the inner circle of the friction surface, and the protruding height is greater than or equal to the protruding height of the friction surface.

[0009] In combination with the first aspect, the friction surface of the first shaft end is used to rub against the tail plate of the brake, the outer diameter of the convex ring of the first shaft end is smaller than the diameter of the center hole of the tail plate, the protruding height of the convex ring located at the first shaft end is greater than the protruding height of the friction surface, and extends into the center hole of the tail plate.

[0010] In combination with the first aspect, in a possible implementation, the cross-sectional shape of the convex ring is one or more of a rectangle, a right-angled trapezoid, an isosceles trapezoid, and a parallelogram.

[0011] In combination with the first aspect, in a possible implementation, a retaining ring is provided on the inner periphery of the convex ring, the retaining ring is spaced from the end surface of the disk body and extends radially along the disk body, and the retaining ring is spaced from the inner wall of the center hole.

[0012] In combination with the first aspect, in a possible implementation manner, the convex ring and the disc body are integrally formed, or the convex ring and the disc body are separately provided.

[0013] In combination with the first aspect, in a possible implementation, the convex ring is an oil-absorbing sponge, and the oil-absorbing sponge is adhered to the disc body.

[0014] Compared to the prior art, the solution shown in the embodiment of the present application requires grease to be applied to the inner wall of the central hole of the disc body before assembly. The application location is close to the first axial end face of the friction disc. When installing the brake, the sleeve or drive shaft needs to be inserted from the first axial end of the disc body and moved in a direction close to the second axial end. During this process, the gap is reduced, allowing grease on the inner wall of the central hole to be scraped out. After wiping off the leaked and accumulated grease, the disc can be used normally. During the rotation of the friction disc, the raised ring forms a barrier to block the grease from being thrown out. The friction disc of the utility model reduces the gap between the friction disc and the sleeve by applying grease to the central hole, thereby reducing the collision noise caused by the large gap between the friction disc and the sleeve. In addition, the applied grease forms an oil film on the inner ring of the friction disc and the outer ring of the sleeve. When the brake is engaged and released, it increases the lubrication between the friction disc and the sleeve, increases the sliding speed of the friction disc in the axial direction, and can timely adjust and maintain good balance between the armature and the tail plate, reducing the noise caused by the collision between the armature and the tail plate. The raised ring prevents grease from entering the friction surface, ensuring the normal operation of the brake.

[0015] In a second aspect, an embodiment of the present invention further provides a brake having the above-mentioned friction disc.

[0016] Compared to the prior art, the solution shown in the embodiments of this application features a tail plate that fits over the outer periphery of the raised ring on the first axial end of the friction disc and is spaced apart from it during actual assembly. The tail plate is connected to the housing and located at the axial end of the friction disc facing away from the armature. When the armature is released, it moves closer to the friction disc, driving the friction disc to abut against the tail plate, achieving braking. The raised ring on the friction disc is located within the center hole of the tail plate. This brake offers the advantage of low noise during operation and prevents grease from the inner circumference of the friction disc from being thrown onto the friction surface, ensuring effective braking and improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the main structure of the friction disc provided in Example 1 of the present utility model;

[0018] Figure 2 For the Figure 1 Schematic diagram of the cross-sectional structure along the AA line;

[0019] Figure 3 A schematic cross-sectional view of a friction disc provided in the second embodiment of the present invention;

[0020] Figure 4 A schematic cross-sectional view of a friction disc provided in a third embodiment of the present invention;

[0021] Figure 5 for Figure 4 A schematic diagram of the enlarged structure of the middle B part;

[0022] Figure 6 This is a partial enlarged structural diagram of the convex ring used in the fourth embodiment of the present utility model;

[0023] Figure 7 This is a partial enlarged structural diagram of the convex ring used in the fifth embodiment of the present utility model;

[0024] Figure 8 This is a partial enlarged structural diagram of the convex ring used in Example 6 of the present utility model;

[0025] Figure 9 A schematic cross-sectional view of a brake according to a second embodiment of the present invention;

[0026] Figure 10 This is a schematic cross-sectional structure diagram of the friction disc provided in Example 7 of the present utility model.

[0027] Description of reference numerals:

[0028] 10-disc body; 11-friction surface; 12-connection surface;

[0029] 20-convex ring;

[0030] 30- boss;

[0031] 40-middle hole;

[0032] 50- retaining ring;

[0033] 60-armature;

[0034] 70-Tail board. DETAILED DESCRIPTION

[0035] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0036] In the claims, description and the above-mentioned drawings of the present utility model, unless otherwise clearly defined, the use of terms such as "first", "second" or "third" is to distinguish different objects rather than to describe a specific order.

[0037] In the claims, specification and above-mentioned drawings of the present invention, the term "inner" refers to the direction toward the axis of the friction disk, and the term "outer" refers to the direction away from the axis of the friction disk; other directional words, unless otherwise explicitly defined, such as the terms "upper", "lower", "top", "bottom", "front", "rear", "center", "transverse", "longitudinal", "horizontal", "vertical", "left", "right", "clockwise", "counterclockwise", "high", "low" and the like to indicate directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation or be constructed and operated in a specific orientation, so they cannot be understood as limiting the specific protection scope of the present invention.

[0038] In the claims, specification and the above drawings of the present utility model, unless otherwise clearly defined, if the terms "fixed connection" or "fixed connection" are used, they should be understood in a broad sense, that is, any connection method without any displacement relationship and relative rotation relationship between the two parties, that is to say, including non-detachable fixed connection, detachable fixed connection, integral connection and fixed connection through other devices or elements.

[0039] In the claims, description and drawings of the present utility model, if the terms "include", "have" and their variations are used, they are intended to mean "including but not limited to".

[0040] Please also refer to Figures 1 to 8The friction disc provided by the present invention is now described. The friction disc comprises a disc body 10 and a raised ring 20 disposed at a first axial end of the disc body 10. The disc body 10 has a central hole 40 extending therethrough and a friction surface 11 for friction braking. The central hole 40 is greased and engages with a shaft sleeve or drive shaft. The raised ring 20 surrounds the outer periphery of the central hole 40 and is spaced apart from the inner wall of the central hole 40. The friction surface 11 is located at both end surfaces of the disc body 10. Both the friction surface 11 and the raised ring 20 protrude from the end surfaces of the disc body 10. The friction surface 11 is spaced apart from the outer ring of the raised ring 20, and the protrusion height of the friction surface 11 is less than or equal to the protrusion height of the raised ring 20.

[0041] It should be noted that the shape of the middle hole 40 is not limited and can be a regular shape such as a spline, a hexagon, a square, or other irregular shapes.

[0042] Compared with the prior art, the friction disc provided in this embodiment requires grease to be applied to the inner wall of the center hole 40 of the disc body 10 before assembly. The coating position is close to the first axial end face of the friction disc. When installing the brake, the sleeve or drive shaft needs to extend from the first axial end of the disc body 10 and move in the direction close to the second axial end. During this process, the gap is reduced, so that the grease on the inner wall of the center hole 40 is scraped out. After the leaked and accumulated grease is wiped off, it can be used normally. During the rotation of the friction disc, the convex ring 20 forms an isolation belt to block the grease that is thrown out. The friction disc of the present invention reduces the gap between the friction disc and the shaft sleeve by applying grease to the center hole 40, thereby reducing the collision noise between the friction disc and the shaft sleeve. In addition, the applied grease forms an oil film on the inner ring of the friction disc and the outer ring of the shaft sleeve. When the brake is applied and released, the lubrication between the friction disc and the shaft sleeve is increased, and the sliding speed of the friction disc in the axial direction is increased. It can be adjusted in time and ensure a good balance between the armature 60 and the tail plate 70, thereby reducing the noise generated by the collision between the armature 60 and the tail plate 70. The convex ring 20 is provided to prevent grease from entering the friction surface 11, thereby ensuring the normal operation of the brake.

[0043] In some implementations, a modified embodiment of the above-mentioned disc can be adopted as follows Figures 2 to 8 The structure shown. Figures 2 to 8 A boss 30 is provided at the second axial end of the disc body 10 , and the second axial end is the opposite end of the first axial end. The protruding height of the boss 30 is greater than the protruding height of the friction surface 11 , and the middle hole 40 passes through the boss 30 .

[0044] It is easy to understand that since the boss 30 is set at the second shaft end, the friction surface 11 compared with the boss 30 is the friction surface 11 located at the second shaft end, that is, the protruding height of the boss 30 is greater than the protruding height of the friction surface 11 located at the second shaft end.

[0045] By arranging the boss 30 at the second axial end of the disc body 10 , the boss 30 can be extended into the center hole of the armature 60 during assembly, thereby providing a guiding effect during the relative sliding between the armature 60 and the friction disc.

[0046] In some embodiments, an improved embodiment of the convex ring 20 can be adopted as follows Figure 3 and Figure 9 See the structure shown. Figure 3 and Figure 9 There are multiple protruding rings 20, which are spaced from the inside to the outside, and the inner diameters of the protruding rings 20 increase successively. When the grease blocked by the innermost protruding ring 20 is full, it will flow into the inner circumference of the next protruding ring 20. Different numbers of protruding rings 20 can achieve different oil blocking effects, and the specific number is selected according to actual use requirements.

[0047] The innermost convex ring 20 is spaced apart from the inner wall of the central hole 40 , and the outer diameter of the outermost convex ring 20 is smaller than the inner diameter of the friction surface 11 on the coaxial side.

[0048] Specifically, the protruding heights of multiple protruding rings 20 compared to the first shaft end face can be the same or different. For example, the protruding heights of multiple protruding rings 20 gradually increase from the inside to the outside, but the protruding height of the protruding ring 20 located on the outermost circle is greater than or equal to the protruding height of the side friction surface 11.

[0049] In some embodiments, an improved embodiment of the convex ring 20 may adopt a structure as shown in FIG10. Figure 10 The second axial end of the disk body 10 is also provided with a convex ring 20. The second axial end is the opposite end of the first axial end. The convex ring 20 located at the second axial end is located at the inner circle of the friction surface 11, and the protruding height is greater than or equal to the protruding height of the friction surface 11.

[0050] It is easy to understand that the friction surface 11, which is compared with the raised ring 20 located at the second shaft end, is also located at the second shaft end. That is, the raised ring 20 on the second shaft end is located inside the friction surface 11 on the second shaft end, and the protruding height of the raised ring 20 on the second shaft end is greater than or equal to the protruding height of the friction surface 11 on the second shaft end. The protruding height of the raised ring 20 is also the height by which the raised ring 20 protrudes from the second shaft end surface.

[0051] In this embodiment, without providing the boss 30 on the disc body 10, a convex ring 20 can be provided on both axial ends of the disc body 10, so that the grease in the center hole 40 can be blocked on both axial end surfaces of the friction disc, thereby protecting the friction surfaces at both axial ends.

[0052] Specifically, the raised ring 20 on the second shaft end may also be arranged in multiple circles from the inside to the outside.

[0053] In some embodiments, a specific embodiment of the convex ring 20 can be as follows: Figure 3 and Figure 9 See the structure shown. Figure 3 and Figure 9 The friction surface 11 at the first shaft end is used to rub against the tail plate 70 of the brake. The outer diameter of the convex ring 20 at the first shaft end is smaller than the diameter of the center hole of the tail plate 70. The protruding height of the convex ring 20 at the first shaft end is greater than the protruding height of the friction surface 11 and extends into the center hole of the tail plate 70.

[0054] When there are multiple protruding rings 20 at the first shaft end, the multiple protruding rings 20 are all located in the hole in the tail plate 70 .

[0055] In some embodiments, a specific embodiment of the convex ring can be as follows: Figure 7 See the structure shown. Figures 3 to 7 The cross-sectional shape of the convex ring 20 is one or more of a rectangle, a right-angled trapezoid, an isosceles trapezoid, and a parallelogram.

[0056] Among them, when multiple protruding rings 20 are provided, the cross-sectional shapes of the multiple protruding rings 20 may be the same or different; and when the protruding rings 20 are provided at both axial ends of the disc body 10, the cross-sectional shapes of the protruding rings 20 at the two axial ends may also be the same or different.

[0057] For example, the shape of the convex ring 20 is rectangular, see Figure 3 The inner and outer circumferential surfaces of the convex ring 20 are parallel to the axial direction of the disc body 10. The convex ring 20 of this structure is easy to process and manufacture.

[0058] When the cross-sectional shape of the protruding ring 20 is a right-angled trapezoid, an isosceles trapezoid or a parallelogram, see Figures 5 to 7 The inner circumference of the convex ring 20 gradually tilts toward the axis of the disc body 10 in the direction away from the disc body 10. In this embodiment, the outer circumference of the convex ring 20 is parallel to the axis of the disc body 10 (see Figure 6 ); or the outer peripheral surface of the convex ring 20 gradually approaches the axis of the disc body 10 in a direction away from the disc body 10 (see Figure 7 ); or the outer peripheral surface of the convex ring 20 gradually tilts away from the axial direction of the disc body 10 in the direction away from the disc body 10 (see Figure 5 ).

[0059] The inner peripheral surface of the convex ring 20 is inclined to store the scraped grease and has a certain blocking effect on the grease, thereby preventing the grease from flowing out from the end surface of the convex ring 20.

[0060] In some embodiments, a modified embodiment of the convex ring 20 can be as follows Figure 8 See the structure shown. Figure 8A retaining ring 50 is provided on the inner periphery of the convex ring 20 . The retaining ring 50 is spaced from the end surface of the disc body 10 and extends radially along the disc body 10 . The retaining ring 50 is spaced from the inner wall of the middle hole 40 .

[0061] It should be noted that when the convex ring 20 is set at the first axial end, the retaining ring 50 on the convex ring 20 is spaced from the first axial end surface; when the convex ring 20 is set at the second axial end, the retaining ring 50 on the convex ring 20 is spaced from the second axial end surface.

[0062] The retaining ring 50 , the inner circumference of the convex ring 20 and the axial end surface of the disc body 10 enclose a groove body, which can store a certain amount of grease and better prevent the grease from flowing into the friction surface 11.

[0063] In some embodiments, a specific arrangement for the protruding ring 20 and the disc body 10 can be as follows. The protruding ring 20 and the disc body 10 can be integrally formed, or they can be provided separately. When the protruding ring 20 and the disc body 10 are provided separately, the protruding ring 20 can be connected to the disc body 10 by bonding, snapping, or other methods. The protruding ring 20 can be made of metal, plastic, rubber, or other materials. An oil-absorbing sponge can also be used as the protruding ring 20.

[0064] When the convex ring 20 is an oil-absorbing sponge, it can be directly attached to the disc body 10. The oil-absorbing sponge can not only block the grease from entering the friction surface 11 when the friction disc rotates, but also absorb some excess grease.

[0065] Based on the same inventive concept, see Figure 9 , an embodiment of the present application also provides a brake having the above-mentioned friction disc.

[0066] Compared to the prior art, the brake provided in this embodiment features a tail plate 70 that fits around the outer periphery of the raised ring 20 at the first axial end of the friction disc and is spaced apart from the raised ring 20 during assembly. Tail plate 70 is connected to the housing and located at the axial end of the friction disc facing away from the armature 60. When the armature 60 is released, it moves closer to the friction disc, driving the friction disc to abut against tail plate 70 and achieve braking. The raised ring 20 on the friction disc is located within the central hole of tail plate 70. This brake offers the advantage of low noise during operation and prevents grease from the inner circumference of the friction disc from being thrown onto the friction surface 11, ensuring effective braking and improving safety.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A friction disc, characterized in that: It includes a disc body and a convex ring provided at the first axial end of the disc body, the disc body having a through-hole and a friction surface for friction braking, the hole being coated with grease and cooperating with a bushing or a transmission shaft, the convex ring surrounding the outer periphery of the hole and spaced apart from the inner wall of the hole; the friction surface is located at both end surfaces of the disc body, the friction surface and the convex ring both protrude from the end surface of the disc body, the friction surface spaced apart at the outer ring of the convex ring, and the protruding height of the friction surface is less than or equal to the protruding height of the convex ring.

2. The friction disc according to claim 1, wherein A boss is provided at the second axial end of the disc body. The second axial end is an opposite end to the first axial end. The protruding height of the boss is greater than the protruding height of the friction surface. The center hole passes through the boss.

3. The friction disc according to claim 1, wherein There are multiple convex rings, and the multiple convex rings are spaced apart from the inside to the outside, and the inner diameters of the multiple convex rings increase sequentially.

4. The friction disc according to claim 1, wherein The second axial end of the disc body is also provided with a convex ring, which is the opposite end of the first axial end. The convex ring at the second axial end is located at the inner circle of the friction surface, and the protruding height is greater than or equal to the protruding height of the friction surface.

5. The friction disc according to claim 1, wherein: The friction surface of the first shaft end is used to rub against the tail plate of the brake. The outer diameter of the convex ring at the first shaft end is smaller than the diameter of the center hole of the tail plate. The protruding height of the convex ring located at the first shaft end is greater than the protruding height of the friction surface and extends into the center hole of the tail plate.

6. The friction disc according to claim 1, wherein: The cross-sectional shape of the convex ring is one or more of a rectangle, a right-angled trapezoid, an isosceles trapezoid, and a parallelogram.

7. The friction disc according to claim 1, wherein: A retaining ring is provided on the inner periphery of the convex ring. The retaining ring is spaced apart from the end surface of the disc body and extends radially along the disc body. The retaining ring is spaced apart from the inner wall of the central hole.

8. The friction disc according to claim 1, wherein The convex ring and the disc body are integrally formed, or the convex ring and the disc body are separately provided.

9. The friction disc according to claim 1, wherein: The convex ring is an oil-absorbing sponge, and the oil-absorbing sponge is adhered to the disc body.

10. A brake, characterized in that: A friction disc according to any one of claims 1 to 9.

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