brakes

Abstract

The present invention provides a brake, comprising: a stator, the outer periphery of which has a limiting step so that the outer periphery of the stator forms a limiting space toward the second end face; an armature, arranged adjacent to the first end face; a coil, arranged in a first groove; a first elastic member, arranged in the second groove; a friction assembly, sleeved on the outer periphery of the stator; a movable plate, sleeved on the outer periphery of the stator, and the friction assembly is located between the movable plate and the limiting step; and an assembly member fixedly connected to the armature and the movable plate; the friction assembly comprises: a support plate, sleeved on the outer periphery of the stator, the outer periphery of the support plate is configured to adapt to the target device, the support plate is provided with a plurality of receiving grooves, the receiving grooves penetrate the support plate along the axial direction of the support plate, and the width of the receiving grooves in the centrifugal direction has a decreasing trend; and a plurality of friction blocks, respectively located in the plurality of receiving grooves, the thickness of the friction blocks in the axial direction is greater than the thickness of the receiving grooves in the axial direction, and the width of the friction blocks in the centrifugal direction has a decreasing trend.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical brakes, and in particular relates to a brake. Background Art

[0002] The brake mainly relies on the coordination of structures such as stator, coil, armature, friction disc, and elastic parts to play a braking role. When the coil is energized, a magnetic field will be generated around the coil, and the gap between the stator and armature will generate a magnetic force that attracts each other.

[0003] A conventional friction disc is connected to the drive shaft of the braked device via a sleeve. Specifically, the inner ring of the sleeve is connected to the drive shaft, while the outer ring of the sleeve is connected to the friction disc. During braking, the sleeve applies pressure to the friction disc, which in turn brakes the drive shaft. Because the friction disc moves axially during braking, a clearance fit is typically used between the friction disc and sleeve.

[0004] In the released state, when the transmission shaft drives the friction disc to rotate through the sleeve, the friction disc rotates laggingly relative to the sleeve, causing collision between the two and emitting collision noise, resulting in a poor user experience and greater noise pollution. Summary of the Invention

[0005] The purpose of the present invention is to provide a brake, which aims to solve the technical problem that in the process of the transmission shaft driving the friction disk to rotate through the shaft sleeve, the friction disk rotates lagging relative to the shaft sleeve, resulting in collision between the two, emitting collision noise, resulting in poor user experience and greater noise pollution.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] The present invention provides a brake, comprising: a stator having a first end face and a second end face in an axial direction, the first end face being provided with a first groove and a second groove, the outer circumference of the stator being provided with a limiting step, the limiting step forming a limiting space on the outer circumference of the stator facing the second end face; an armature being arranged adjacent to the first end face; a coil being arranged in the first groove; a first elastic member being arranged in the second groove; a friction assembly being sleeved on the outer circumference of the stator and located in the limiting space; a movable plate being sleeved on the outer circumference of the stator and located in the limiting space, the friction assembly being located between the movable plate and the limiting step; and an assembly member being fixedly connected to the armature and the movable plate.

[0008] The friction assembly includes: a support plate, sleeved on the outer periphery of the stator, the outer periphery of the support plate being configured to adapt to the target device, the support plate being provided with a plurality of receiving grooves, the receiving grooves penetrating the support plate along the axial direction of the support plate, the width of the receiving grooves in the centrifugal direction having a decreasing trend; and a plurality of friction blocks, respectively located in the plurality of receiving grooves, the thickness of the friction blocks in the axial direction being greater than the thickness of the receiving grooves in the axial direction, and the width of the friction blocks in the centrifugal direction having a decreasing trend;

[0009] Wherein, near the outer peripheral edge of the support plate, there is a fitting clearance between the friction block and the receiving groove in the centrifugal direction, the fitting clearance changes synchronously with the position change of the friction block, and the fitting clearance is always greater than zero during the change. When the fitting clearance is at a minimum value, in the circumferential direction of the support plate, the two side walls of the friction block abut against the two side walls of the receiving groove;

[0010] Moreover, in the axial direction, the friction block of the friction assembly can abut against the movable plate and the limiting step; the coil generates a magnetic field when energized, causing the armature to overcome the elastic force of the first elastic member and move toward the stator, and the armature drives the movable plate to move away from the friction assembly, releasing the friction assembly.

[0011] In some possible implementations, a second elastic member is provided in the receiving groove, and the second elastic member abuts against one end of the friction block, where the end is close to the inner peripheral edge of the support plate.

[0012] In some possible implementations, the support plate is further provided with a limiting groove connected to the receiving groove, the second elastic member is partially located in the limiting groove, and the second elastic member is partially located in the receiving groove; a guide member is provided in the limiting groove, the second elastic member is configured as an annular structure, the second elastic member is sleeved on the guide member, and the guide member is entirely accommodated in the space of the limiting groove.

[0013] In some possible implementations, the support plate is further provided with a snap-in groove separated from the receiving groove, the second elastic member is configured as a sheet-like structure, the second elastic member is partially snap-into the snap-in groove, and the second elastic member is partially located in the receiving groove.

[0014] In some possible implementations, the armature includes a plurality of action pieces distributed around the axis, the movable plate includes a plurality of first movable pieces distributed around the axis, and the action pieces and the first movable pieces are connected via the assembly part.

[0015] In some possible implementations, the number of the active plates is the same as the number of the first movable plates, each active plate is aligned with each first movable plate in the circumferential direction, and each active plate is connected to each corresponding first movable plate through a number of the assembly parts.

[0016] In some possible implementations, the number of the active plates is the same as the number of the first movable plates, each active plate and each first movable plate are staggered in the circumferential direction, and each active plate is connected to the corresponding two first movable plates through a number of the assembly parts.

[0017] In some possible implementations, the number of the first movable sheets is twice or more than the number of the action sheets, and each action sheet covers two or more of the first movable sheets in the circumferential direction; or, the number of the action sheets is twice or more than the number of the first movable sheets, and every two or more action sheets cover one of the first movable sheets in the circumferential direction.

[0018] In some possible implementations, a plurality of positioning grooves are provided on the outer periphery of the stator, and the inner periphery of each first movable piece has a first positioning protrusion adapted to the positioning groove, and the assembly part is slidably inserted into the stator from the first positioning protrusion.

[0019] In some possible implementations, there are N friction assemblies and N movable plates, where N is an integer greater than or equal to 1, and the N movable plates and the N friction assemblies are alternately arranged. The Nth movable plate is adjacent to the Nth friction assembly, and the Nth friction assembly is adjacent to the limiting step. The first movable plate is fixedly connected to the armature through the assembly part; in the axial direction, the friction block of the Nth friction assembly can abut against the Nth movable plate and the limiting step, and the friction block of each of the remaining friction assemblies can abut against two adjacent movable plates.

[0020] The brake provided by the present invention has at least the following technical effects compared to the prior art: The above technical solution provides a brake including a friction assembly, the friction assembly comprising a support plate and a plurality of friction blocks, the support plate having a plurality of receiving grooves for receiving the friction blocks. Compared to conventional friction disc structures, the support plate can be directly fixed to the drive shaft, eliminating hysteresis between the two, reducing collision noise, improving user experience, and reducing the cost of replacing the friction blocks compared to replacing the entire friction disc. The widths of the receiving grooves and friction blocks in the centrifugal direction both tend to decrease. Under the action of centrifugal force, the friction blocks move outward. Based on the tapered design of the receiving grooves and friction blocks, the fit clearance gradually decreases, enabling adaptive pressure regulation and preventing excessive friction or slippage. When the fit clearance is minimum, the two side walls of the friction block abut against the two side walls of the receiving groove, ensuring synchronous rotation of the friction block and the support plate, limiting the displacement of the friction block in the circumferential direction, preventing uneven wear and vibration, and improving the stability of the friction assembly. Moreover, because the fit clearance is always greater than zero, the collision noise and collision wear between the friction block and the support plate can be greatly reduced. In addition, since there is always a matching gap between the friction block and the receiving groove, airflow, debris, sundries, etc. can pass through, reducing the accumulation of friction heat and reducing the obstruction to the friction block. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 A schematic structural diagram of a brake provided in one embodiment of the present invention;

[0023] Figure 2 for Figure 1 The schematic diagram of the structure of the brake shown in another angle;

[0024] Figure 3 for Figure 2 A perspective cutaway view of the brake shown at section EE;

[0025] Figure 4 for Figure 2 A cross-sectional view of the brake shown at section FF;

[0026] Figure 5 A schematic structural diagram of a friction assembly provided in one embodiment of the present invention;

[0027] Figure 6 for Figure 5A partially enlarged schematic diagram of structure A is shown;

[0028] Figure 7 for Figure 5 Another structural schematic diagram of the friction assembly shown;

[0029] Figure 8 for Figure 5 Another structural schematic diagram of the friction assembly shown;

[0030] Figure 9 A schematic structural diagram of a friction assembly provided in another embodiment of the present invention;

[0031] Figure 10 for Figure 9 The structure B shown is a partially enlarged schematic diagram when a guide member is provided;

[0032] Figure 11 A schematic structural diagram of a friction assembly provided in yet another embodiment of the present invention;

[0033] Figure 12 for Figure 11 Another structural schematic diagram of the friction assembly shown;

[0034] Figure 13 for Figure 11 A schematic structural diagram of the support plate in the friction assembly shown;

[0035] Figure 14 for Figure 11 A schematic structural diagram of the second elastic member in the friction assembly shown;

[0036] Figure 15 A schematic structural diagram of a friction assembly provided in yet another embodiment of the present invention;

[0037] Figure 16 A schematic structural diagram of a friction block provided in one embodiment of the present invention;

[0038] Figure 17 A schematic structural diagram of a friction block provided in another embodiment of the present invention;

[0039] Figure 18 A schematic structural diagram of a friction block provided in yet another embodiment of the present invention;

[0040] Figure 19 A schematic structural diagram of a friction block provided in yet another embodiment of the present invention;

[0041] Figure 20 A schematic structural diagram of a brake provided in another embodiment of the present invention;

[0042] Figure 21 for Figure 20 A cross-sectional view of the brake shown at section GG;

[0043] Figure 22 for Figure 20 A schematic diagram of the stacking of the armature, friction assembly, and movable plate in the brake shown;

[0044] Figure 23 for Figure 20 The schematic diagram of the structure of the stator in the brake shown;

[0045] Figure 24 for Figure 20 The schematic diagram of the structure of the stator in the brake shown is at another angle;

[0046] Figure 25 for Figure 20 The schematic diagram of the structure of the armature in the brake shown;

[0047] Figure 26 for Figure 20 A schematic diagram of the structure of the movable plate in the brake shown;

[0048] Figure 27 A schematic diagram of stacking an armature, a friction assembly, and a movable plate in a brake provided in yet another embodiment of the present invention;

[0049] Figure 28 A schematic diagram of stacking an armature, a friction assembly, and a movable plate in a brake provided in yet another embodiment of the present invention;

[0050] Figure 29 A schematic diagram of stacking an armature, a friction assembly, and a movable plate in a brake provided in another embodiment of the present invention;

[0051] Figure 30 A cross-sectional view of a brake provided in accordance with an embodiment of the present invention includes a plurality of friction assemblies and a plurality of movable plates.

[0052] Description of reference numerals:

[0053] 1. Brake, 10. Stator, 11. First end face, 111. First groove, 112. Second groove, 12. Second end face, 13. Limiting step, 131. Limiting space, 14. Positioning groove, 15. Sliding hole, 16. Mounting hole, 20. Armature, 21. Action plate, 211. First assembly hole, 212. Avoidance, 30. Coil, 40. First elastic member, 50. Friction assembly, 51. Support plate, 511. Receiving groove, 512. Limiting groove, 513. Clamping groove, 514. Mounting portion, 52. Friction block, 521. Friction surface, 522. Fillet, 523. Arc surface, CD, centrifugal direction, FC, fitting clearance, 53. Second elastic member, 54. Guide member, 60. Movable plate, 61. First movable piece, 611. First positioning protrusion, 6111. Second assembly hole, 70. Assembly member, 80. Mounting member. DETAILED DESCRIPTION

[0054] 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.

[0055] It should be noted that when an element is referred to as being "fixed to," "fixed to," "connected to," "connected to," "disposed to," "provided to," or "fixed to" another element, an intermediate element may or may not be present. Furthermore, when an element is referred to as being "connected to" or "connected to" another element, this can be interpreted as meaning a mechanical connection, an electrical connection, a communication connection, or the like, based on the common understanding of those skilled in the art. As used herein, "plurality" refers to two or more; "several" refers to one or more.

[0056] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0057] Please also refer to Figures 1 to 30 , the brake provided by the embodiment of the present invention is now described.

[0058] See also Figures 1 to 15 An embodiment of the present invention provides a brake 1, comprising: a stator 10, having a first end face 11 and a second end face 12 in the axial direction, the first end face 11 being provided with a first groove 111 and a second groove 112, the outer periphery of the stator 10 being provided with a limiting step 13, the limiting step 13 forming a limiting space 131 on the outer periphery of the stator 10 facing the second end face 12; an armature 20, arranged adjacent to the first end face 11; a coil 30, arranged in the first groove 111; a first elastic member 40, arranged in the second groove 112; a friction assembly 50, sleeved on the outer periphery of the stator 10, and located in the limiting space 131; a movable plate 60, sleeved on the outer periphery of the stator 10, located in the limiting space 131, and the friction assembly 50 is located between the movable plate 60 and the limiting step 13; and an assembly part 70, fixedly connected to the armature 20 and the movable plate 60.

[0059] Among them, the friction assembly 50 includes: a support plate 51, which is sleeved on the outer periphery of the stator 10, the outer periphery of the support plate 51 is configured to adapt to the target device, the support plate 51 is provided with a plurality of receiving grooves 511, the receiving grooves 511 penetrate the support plate 51 along the axial direction of the support plate 51, and the width of the receiving grooves 511 in the centrifugal direction CD has a decreasing trend; and a plurality of friction blocks 52, respectively located in the plurality of receiving grooves 511, the axial thickness of the friction blocks 52 is greater than the axial thickness of the receiving grooves 511, and the width of the friction blocks 52 in the centrifugal direction CD has a decreasing trend.

[0060] Among them, at the outer peripheral edge near the support plate 51, there is a fitting clearance FC between the friction block 52 and the receiving groove 511 in the centrifugal direction CD. The fitting clearance FC changes synchronously with the position change of the friction block 52, and the fitting clearance FC is always greater than zero during the change. When the fitting clearance FC is the minimum value, in the circumferential direction of the support plate 51, the two side walls of the friction block 52 abut against the two side walls of the receiving groove 511; and, in the axial direction, the friction block 52 of the friction assembly 50 can abut against the movable plate 60 and the limiting step 13; the coil 30 generates a magnetic field when energized, so that the armature 20 overcomes the elastic force of the first elastic member 40 and moves toward the stator 10, and the armature 20 drives the movable plate 60 to move away from the friction assembly 50, releasing the friction assembly 50.

[0061] Specifically, the stator 10 may also be referred to as a housing, casing, yoke, yoke core, or other commonly used technical terms in the art. The stator 10 itself is non-magnetic. When the coil 30 is energized, the stator 10 becomes magnetized and magnetic. When the coil 30 is de-energized, the magnetism of the stator 10 disappears. The number of first grooves 111 is the same as that of the coil 30, and one or more of each can be provided. The number of second grooves 112 is the same as that of the first elastic member 40, and multiple grooves are typically provided.

[0062] The outer periphery of the stator 10 has a limiting step 13 extending away from the axis, forming a limiting space 131 between the limiting step 13 and the second end surface 12. The friction assembly 50 and the movable plate 60 are both accommodated in the limiting space 131. The multiple friction blocks 52 in the friction assembly 50 can contact the movable plate 60 on one side and the limiting step 13 on the other side. The movable plate 60 and the armature 20 are fixedly connected via a plurality of assembly members 70. For example, a sliding hole 15 can be defined in the stator 10, a first assembly hole 211 can be defined in the armature 20, and a second assembly hole 6111 can be defined in the movable plate 60. The assembly members 70 are inserted into the first and second assembly holes 211 and slidably inserted into the sliding hole 15. The assembly members 70 can be screws, bolts, studs, weldments, clips, pins, rivets, expansion members, tie wraps, etc., and can also be integrally provided with either the armature 20 or the movable plate 60, without limitation. The stator 10 can be locked to the target device through several mounting parts 80. For example, the stator 10 can have a mounting hole 16, and the armature 20 can have a avoidance opening 212. The mounting part 80 is passed through the mounting hole 16 and the avoidance opening 212. The mounting part 80 can be a screw, bolt, stud, welding part, clip, pin, rivet, expansion part, binding belt and other structures, and there is no restriction on this.

[0063] When there is no need to brake the target device, the coil 30 generates a magnetic field when energized, causing the armature 20 to overcome the elastic force of the first elastic member 40 and move toward the stator 10. The armature 20 simultaneously drives the movable plate 60 to move in the direction away from the friction assembly 50, thereby releasing the pressure of the movable plate 60 on the friction assembly 50, and the friction assembly 50 rotates together with the target device through the outer periphery of the support plate 51; when the target device needs to be braked, the coil 30 is de-energized, and under the elastic force of the first elastic member 40, the armature 20 moves in the direction away from the stator 10, while driving the movable plate 60 to move in the direction close to the limit step 13, thereby achieving the pressure of the movable plate 60 on the friction assembly 50, and the two end faces of the friction block 52 in the friction assembly 50 respectively friction-brake with the movable plate 60 and the limit step 13, and the friction assembly 50 prevents the target device from rotating through the outer periphery of the support plate 51.

[0064] The coil 30 and first elastic member 40 are both located within the stator 10, while the friction assembly 50 and movable plate 60 are both sleeved around the outer periphery of the stator 10. Therefore, the overall thickness of the brake 1 is determined by the thickness of the stator 10 and the thickness of the armature 20, that is, the sum of the thicknesses of the stator 10 and the armature 20. Of course, the gap between the armature 20 and the stator 10, as well as the distance that the movable plate 60 protrudes beyond the second end surface 12 of the stator 10, must be considered in both the braking and release states. This arrangement results in a more compact overall structure of the brake 1, with improved space utilization and a thinner overall thickness compared to a stacked structure.

[0065] The material of the support plate 51 is preferably metal material, and the material of the friction block 52 is preferably friction material, specifically a polymer ternary composite material, which is composed of three major categories: polymer binder (resin and rubber), reinforcing fiber and friction performance regulator, and other compounding agents are added, and it is made through a series of production and processing.

[0066] The support plate 51 has a plurality of receiving grooves 511, and a friction block 52 is embedded in each receiving groove 511. Figure 7 、 Figure 8 、 Figure 11 and Figure 12 As shown, the thickness of the friction block 52 in the axial direction is greater than the thickness of the receiving groove 511 in the axial direction, so that the friction block 52 can abut the movable plate 60, the limiting step 13, etc. to achieve braking, and in the axial direction, the friction block 52 is completely covered by the movable plate 60 and the limiting step 13 to achieve sufficient friction effect. Figure 6 As shown, a clearance FC is defined between the friction block 52 and the receiving groove 511 in the centrifugal direction CD. This clearance FC changes synchronously with the position of the friction block 52, and remains greater than zero throughout the change. It is understood that when the friction block 52 is in the released state, it rotates synchronously with the support plate 51, and the clearance FC is at its minimum value. When the friction block 52 is in the braking state, the friction block 52 and the support plate 51 change from a previously rotating state to a braking state, and the position of the friction block 52 relative to the support plate 51 may change. At this point, the clearance FC also changes adaptively. This clearance FC reduces collision noise between the friction block 52 and the support plate 51, reduces collision wear of the friction block 52, and improves its service life.

[0067] The support plate 51 can be configured as an annular structure, having a mounting portion 514 fixed to the drive shaft of the target device. The mounting portion 514 can be fixed to the drive shaft of the target device directly, or fixed to the drive shaft of the target device through a bushing. Since the support plate 51 is fixedly connected to the drive shaft, the support plate 51 can rotate with the drive shaft, and the support plate 51 will not move axially relative to the drive shaft, which can effectively reduce the noise of the brake 1. The friction block 52 has a lower manufacturing cost than the entire friction disc. The support plate 51 is made of metal parts, and the shape of the center hole or the outer ring of the support plate 51 can be changed by machining, which can be adapted to different drive shafts. Traditional friction discs are made of molds, and they need to be re-molded after changing the shape of the center hole or the outer ring, which has a high manufacturing cost.

[0068] There are multiple friction blocks 52, and there is no limit to the number. The multiple friction blocks 52 can be evenly distributed or unevenly distributed, and the shapes of the multiple friction blocks 52 can be completely the same or not completely the same. Figures 15 to 19 As shown, for example, the axial projection of the friction block 52 can be regular, such as a trapezoid, circle, arc, or arch, or irregular, without limitation, as long as the width of the friction block 52 in the centrifugal direction CD tends to decrease. Accordingly, the axial projection of the receiving groove 511 can be the same as or different from the axial projection of the friction block 52.

[0069] like Figure 16 As shown, in order to prevent the friction block 52 from getting stuck with the receiving groove 511, the edges of the friction block 52 can be rounded 522. Figure 19 As shown, in order to ensure that the friction block 52 can fully contact the movable plate 60, the limiting step 13, etc. even when it is worn, an arcuate surface 523 can be provided on the friction surface 521 of the friction block 52.

[0070] Grease, shock-absorbing paint, or elastic material may be applied to the circumference of the receiving groove 511 to reduce the collision noise between the friction block 52 and the receiving groove 511 .

[0071] It can be understood that the width of the friction block 52 in the centrifugal direction CD is the width of the friction block 52 in the direction away from the rotation axis. Figure 6 and Figure 10 As shown, the width of the friction block 52 in the centrifugal direction CD has a decreasing trend, and the decreasing trend can be gradually reduced. However, in some special designs, such as Figure 15 As shown, it may also be increased first and then decreased, reflecting that the friction block 52 has a tendency to become increasingly wedged near the outer peripheral edge of the support plate 51 .

[0072] Because the widths of the friction block 52 and the receiving groove 511 in the centrifugal direction CD both tend to decrease, during high-speed rotation of the friction assembly 50, the friction block 52 is moved away from the rotation axis by the centrifugal force, thereby abutting against the two side walls of the receiving groove 511. This allows the friction block 52 to rotate synchronously with the support plate 51, thereby preventing collision noise between the friction block 52 and the support plate 51. When the coil 30 is de-energized and the brake 1 is applied, the friction block 52 is squeezed by the movable plate 60 and the like. The combined force exerted on the friction block 52 causes it to move away from the rotation axis, while still abutting against the two side walls of the receiving groove 511.

[0073] The brake 1 provided by the embodiment of the present invention has at least the following technical effects compared with the prior art: the above technical solution provides a brake 1 including a friction assembly 50, the friction assembly 50 includes a support plate 51 and a plurality of friction blocks 52, the support plate 51 is provided with a plurality of receiving grooves 511 for accommodating the friction blocks 52, compared with the traditional friction disc structure, the support plate 51 can be directly fixed to the drive shaft, and no lagging rotation will be generated between the two, thereby reducing collision noise, improving the user experience, and the cost of replacing the friction blocks 52 is lower than the cost of replacing the entire friction disc. The widths of the receiving groove 511 and the friction block 52 in the centrifugal direction CD both tend to decrease. Under the action of centrifugal force, the friction block 52 moves outward. Due to the tapered design of the receiving groove 511 and the friction block 52, the fit clearance FC gradually decreases, enabling adaptive pressure regulation and preventing excessive friction or slippage. When the fit clearance FC is minimized, the two sidewalls of the friction block 52 abut against the two sidewalls of the receiving groove 511, ensuring synchronous rotation of the friction block 52 and the support plate 51. This limits the circumferential displacement of the friction block 52, prevents eccentric wear and vibration, and improves the stability of the friction assembly 50. Furthermore, because the fit clearance FC is always greater than zero, collision noise and wear between the friction block 52 and the support plate 51 are significantly reduced. Furthermore, because the fit clearance FC is always maintained between the friction block 52 and the receiving groove 511, airflow, debris, and other debris can pass through, reducing the accumulation of frictional heat and reducing resistance to the friction block 52.

[0074] The specific structure of the friction assembly 50 is described below by way of example, but is not limited to the following embodiments.

[0075] See also Figures 9 to 14 In some embodiments, a second elastic member 53 is disposed in the receiving groove 511. The second elastic member 53 abuts against one end of the friction block 52, which is close to the inner peripheral edge of the support plate 51. Specifically, the second elastic member 53 may abut between the friction block 52 and the receiving groove 511, close to the inner peripheral edge of the support plate 51, and can provide an elastic preload force to the friction block 52 away from the center of the support plate 51, that is, provide an elastic preload force to the friction block 52 in the centrifugal direction CD. In other words, the second elastic member 53 has an elastic preload force that pushes the friction block 52 toward the outer peripheral direction.

[0076] This elastic preload ensures that the friction block 52 can still provide force in the initial centrifugal direction CD even when rotating at low speeds or when the centrifugal force is insufficient. This ensures that the friction block 52 always abuts the two sidewalls of the receiving groove 511, thereby ensuring synchronous rotation of the friction block 52 and the support plate 51, minimizing collision noise between the friction block 52 and the support plate 51, and improving the response speed of the braking process. Furthermore, the second elastic member 53 absorbs impact loads, reduces rigid collision between the friction block 52 and the receiving groove 511, and extends the service life of the friction block 52. The second elastic member 53 also prevents the friction block 52 from getting stuck, wearing unevenly, or excessively moving, utilizing its self-adjusting properties to reduce the need for manual adjustment. Furthermore, because the second elastic member 53 propels the friction block 52 toward the periphery, it compensates for the increased gap between the friction block 52 and the receiving groove 511 caused by wear, maintaining the contact pressure between the friction block 52 and the support plate 51.

[0077] Among them, Figure 9 and Figure 10 As shown, in some specific embodiments, the support plate 51 is further provided with a limiting groove 512 connected to the receiving groove 511, and the second elastic member 53 is partially located in the limiting groove 512, and the second elastic member 53 is partially located in the receiving groove 511; a guide member 54 is provided in the limiting groove 512, and the second elastic member 53 is configured as an annular structure, the second elastic member 53 is sleeved on the guide member 54, and the guide member 54 is entirely accommodated in the space of the limiting groove 512.

[0078] Specifically, the second elastic member 53 can be an annular structure such as a coil spring or an elastic ring, and the guide member 54 can be a strip structure such as a columnar or rod-shaped structure. The second elastic member 53 is arranged in a sleeve manner on the outer periphery of the guide member 54, which can limit the radial displacement of the second elastic member 53 and avoid lateral bending of the second elastic member 53 due to centrifugal force or vibration, ensuring that the elastic force is always transmitted to the friction block 52, and the guide member 54 is only located in the space of the limiting groove 512 and will not invade the space of the receiving groove 511, which can ensure the freedom of movement of the friction block 52 and does not interfere with the movement position of the friction block 52 in the receiving groove 511.

[0079] In addition, if Figures 11 to 14 As shown, in some other embodiments, the support plate 51 is further provided with a snap-in groove 513 separated from the receiving groove 511, and the second elastic member 53 is configured as a sheet-like structure, the second elastic member 53 is partially snap-into the snap-in groove 513, and the second elastic member 53 is partially located in the receiving groove 511.

[0080] Specifically, the engaging groove 513 is closer to the inner peripheral edge of the support plate 51 than the receiving groove 511. A portion of the second elastic member 53 is engaged in the engaging groove 513, forming a locking limit for the second elastic member 53. The other portion of the second elastic member 53 is located in the receiving groove 511, thereby forming an abutment relationship with the friction block 52. To ensure uniform force on the friction block 52, the second elastic member 53 adopts a symmetrical and curved sheet structure. The second elastic member 53 is engaged in the engaging groove 513 by virtue of the bending of its own structure, and has the same shape at both axial ends of the support plate 51.

[0081] Of course, in other embodiments, the engaging groove 513 may not be provided, and the second elastic member 53 may be fixed in the groove wall of the receiving groove 511 , and no specific limitation is made to this.

[0082] See also Figure 5 、 Figure 7 、 Figure 9 、 Figure 11 、 Figure 13 and Figure 15 In some embodiments, the support plate 51 has a mounting portion 514 for fixing to the transmission shaft of the target device. The mounting portion 514 is located on the inner circle of the support plate 51. Specifically, the mounting portion 514 can be a hole structure, a keyway structure, etc., and is fixed to the transmission shaft by means of threaded connection, clamping, riveting, gluing, welding, etc.

[0083] The specific structures of the armature 20 and the movable plate 60 are described below by way of example, but are not limited to the following embodiments.

[0084] See also Figures 20 to 29 In some embodiments, the armature 20 includes a plurality of action pieces 21 distributed along the axis, each action piece 21 covering a plurality of first elastic members 40. The movable plate 60 includes a plurality of first movable pieces 61 distributed along the axis, and the action pieces 21 and the first movable pieces 61 are connected by an assembly part 70. It is understood that the plurality of action pieces 21 can be evenly distributed along the axis or distributed in a specific pattern. The plurality of first movable pieces 61 can be evenly distributed along the axis or distributed in a specific pattern. The number of action pieces 21 and the number of first movable pieces 61 can be the same or different. The action piece 21 and the first movable piece 61 are fixedly connected by the assembly part 70. That is, the first assembly hole 211 and the second assembly hole 6111 are respectively provided on the action piece 21 and the first movable piece 61, and the avoidance opening 212 is provided on the action piece 21.

[0085] In this embodiment, the armature 20 includes a plurality of active pieces 21, forming a petal-like or comb-like structure. Adjacent active pieces 21 may be connected or disconnected. The movable plate 60 includes a plurality of first movable pieces 61, forming a petal-like or comb-like structure. Adjacent first movable pieces 61 may be connected or disconnected.

[0086] This arrangement provides the armature 20 and movable plate 60 with a certain degree of flexibility compared to a conventional, integral, rigid structure. This allows the plurality of first movable plates 61 to undergo a certain degree of elastic deformation when abutting against the plurality of friction blocks 52. This allows the abutting combination of the first movable plates 61 and the friction blocks 52 to achieve multi-point distributed contact. Even if the first movable plates 61 or friction blocks 52 wear, the first movable plates 61 can maintain their compressive force against the friction blocks 52, thereby ensuring a more uniform friction effect. Furthermore, this reduces metal powder accumulation within the friction area, thereby increasing the service life of the friction assembly 50. Furthermore, the "petal-like" structure employed by both the armature 20 and movable plate 60 allows for greater flexibility in movement. This allows different friction blocks 52 and different first movable plates 61 to achieve a better abutment effect based on different active plates 21, thereby ensuring a more effective friction effect.

[0087] Furthermore, the number of first movable plates 61 is greater than the number of friction blocks 52. This arrangement creates an asymmetrical, uniform circumferential distribution, enabling dynamic, staggered contact and preventing excessive frictional heat at fixed locations. This allows frictional heat and wear to be distributed to more first movable plates 61, preventing excessive wear in localized areas. The intermittent contact reduces noise during braking. Furthermore, this prevents all friction blocks 52 from becoming stuck simultaneously, ensuring that a certain number of friction blocks 52 are always able to rub against the first movable plates 61, achieving effective braking.

[0088] For example, the number of first movable plates 61 and the number of friction blocks 52 are prime to each other. This arrangement can form an asymmetric and uniform circumferential distribution, avoiding periodic resonance during braking, further improving the smoothness and reliability of the braking process, and avoiding production accidents and product quality issues caused by unstable braking.

[0089] Of course, in other embodiments, the distribution of multiple first movable sheets 61 and multiple friction blocks 52 can also be designed in other ways. For example, the number of first movable sheets 61 can be equal to the number of friction blocks 52. For another example, the number of friction blocks 52 can also be greater than the number of first movable sheets 61. For another example, the first movable sheets 61 and friction blocks 52 can be distributed unevenly, etc., and there is no specific restriction on this.

[0090] The number of the active pieces 21 and the number of the first movable pieces 61 are described below by way of example, but are not limited to the following embodiments.

[0091] See also Figure 27 In some embodiments, the number of active plates 21 is the same as the number of first movable plates 61. Each active plate 21 is aligned with each first movable plate 61 in the circumferential direction, and each active plate 21 is connected to each corresponding first movable plate 61 via a plurality of assembly parts 70. The number of friction blocks 52 covered by each first movable plate 61 can be one or more, and there is no limitation on this.

[0092] In this embodiment, each active piece 21, each first movable piece 61, and several assembly parts 70 together constitute a combination. Each combination is separated from each other and will not cause interference. Different groups of active pieces 21, first movable pieces 61, and assembly parts 70 can move freely. The moving distances and abutment states of different groups may be different, but they all abut against the corresponding friction blocks 52 to a greater extent to ensure a more sufficient friction effect.

[0093] See also Figures 20 to 26 In some embodiments, the number of active plates 21 is equal to the number of first movable plates 61. Each active plate 21 is circumferentially offset from each first movable plate 61. Each active plate 21 is connected to two corresponding first movable plates 61 via a plurality of assembly members 70. Each first movable plate 61 may cover one or more friction blocks 52, without limitation.

[0094] In this embodiment, the action piece 21 and the first movable piece 61 are staggered, and there is a linkage effect between one action piece 21 and two first movable pieces 61, which can ensure to a greater extent that the moving distance of each action piece 21 has better consistency, prevent the adjacent action pieces 21 and first movable pieces 61 from deflecting, prevent the action piece 21 and the first movable piece 61 from shaking, and reduce the noise generated by the "petal-shaped" structure.

[0095] See also Figure 28 In some embodiments, the number of first movable pieces 61 is twice or more than the number of active pieces 21, and each active piece 21 circumferentially covers two or more first movable pieces 61. Each active piece 21 is connected to two or more corresponding first movable pieces 61 via a plurality of assembly members 70. Each first movable piece 61 can cover one or more friction blocks 52, without limitation.

[0096] In this embodiment, the number of first movable pieces 61 can be twice, three times, four times or more than the number of action pieces 21. One action piece 21 has a linkage effect with two or more first movable pieces 61, which can ensure to a greater extent that the moving distance of each first movable piece 61 has better consistency, prevent the adjacent action pieces 21 and first movable pieces 61 from deflecting, prevent the action pieces 21 and first movable pieces 61 from shaking, and reduce the noise generated by the "petal-shaped" structure.

[0097] See also Figure 29 The number of active plates 21 is twice or more than the number of first movable plates 61, and every two or more active plates 21 cover one first movable plate 61 in the circumferential direction. Every two or more active plates 21 are connected to a corresponding first movable plate 61 via a plurality of assembly members 70. The number of friction blocks 52 covered by each first movable plate 61 can be one or more, and there is no limitation on this.

[0098] In this embodiment, the number of action pieces 21 can be twice, three times, four times or more than the number of first movable pieces 61. One first movable piece 61 has a linkage effect with two or more action pieces 21, which can ensure to a greater extent that the moving distance of each action piece 21 has better consistency, prevent the adjacent action pieces 21 and first movable pieces 61 from deflecting, prevent the action pieces 21 and first movable pieces 61 from shaking, and reduce the noise generated by the "petal-shaped" structure.

[0099] See also Figure 23 and Figure 26 In some embodiments, the outer circumference of the stator 10 is defined by a plurality of positioning grooves 14. The inner circumference of each first movable piece 61 has a first positioning protrusion 611 that matches the positioning groove 14. The assembly member 70 is slidably inserted into the stator 10 at the first positioning protrusion 611. It will be understood that each first movable piece 61 may have one or more first positioning protrusions 611, and the number of first positioning protrusions 611 is the same as the number of positioning grooves 14. All first positioning protrusions 611 and all positioning grooves 14 are evenly distributed relative to the rotation axis. This ensures uniform force on the various components of the brake 1 and consistent displacement of all active pieces 21.

[0100] Specifically, the armature 20 defines a first assembly hole 211, the first positioning protrusion 611 defines a second assembly hole 6111, and the stator 10 defines a sliding hole 15. The assembly member 70 is free to move axially within the sliding hole 15 of the stator 10, providing a rotational limit for the armature 20 and the movable plate 60 and a guiding function during axial movement. The cooperation between the first positioning protrusion 611 and the positioning groove 14 prevents the movable plate 60 from rotating while providing a certain degree of guidance for the movable plate 60 during axial movement.

[0101] In addition, if Figure 30 As shown, the brake 1 provided in the embodiment of the present invention may also include multiple friction assemblies 50 and multiple movable plates 60. Combined with the above-mentioned situation where there is only one friction assembly 50 and movable plate 60, in summary, in the brake 1 provided in the embodiment of the present invention, both the friction assembly 50 and the movable plate 60 are provided with N, N is an integer greater than or equal to 1, the N movable plates 60 are alternately arranged with the N friction assemblies 50, the Nth movable plate 60 is adjacent to the Nth friction assembly 50, the Nth friction assembly 50 is adjacent to the limiting step 13, and the first movable plate 60 is fixedly connected to the armature 20 by an assembly part 70; in the axial direction, the friction block 52 of the Nth friction assembly 50 can abut against the Nth movable plate 60 and the limiting step 13, and the friction block 52 of each of the remaining friction assemblies 50 can abut against two adjacent movable plates 60.

[0102] Specifically, the first movable plate 60 is the movable plate 60 farthest from the armature 20. The first movable plate 60 is fixedly connected to the armature 20 through the assembly part 70, and the remaining movable plates 60 have no connection relationship with the armature 20. The N friction assemblies 50 and the remaining movable plates 60 are alternately arranged between the first movable plate 60 and the limit step 13. After the brake 1 is installed on the target device, the N friction assemblies 50 are adapted to the target device through their respective support plates 51.

[0103] During the specific design, the mounting member 80 can be locked on the target device after passing through multiple support plates 51, so as to ensure the position reliability of the multiple support plates 51 and prevent the multiple support plates 51 from being deflected and affecting the position reliability of the friction block 52. In addition, a support ring can be mounted on the mounting member 80, and a support ring is set between each adjacent support plate 51, so that a fixed distance can be set between the two adjacent support plates 51.

[0104] When there is no need to brake the target device, the coil 30 generates a magnetic field when energized, causing the armature 20 to overcome the elastic force of the first elastic member 40 and move toward the stator 10. The armature 20 simultaneously drives the first movable plate 60 to move away from the N friction assemblies 50, thereby increasing the distance between the first movable plate 60 and the limiting step 13, thereby releasing the pressure of the N movable plates 60 on the N friction assemblies 50.

[0105] When the target device needs to be braked, the coil 30 is de-energized. Under the elastic force of the first elastic member 40, the armature 20 moves away from the stator 10, and at the same time drives the first movable plate 60 to move toward the limit step 13, thereby reducing the distance between the first movable plate 60 and the limit step 13. The clamping force is transmitted to each friction assembly 50 and the remaining movable plates 60 through the first movable plate 60, thereby achieving the clamping of N friction assemblies 50 by N movable plates 60.

[0106] In an embodiment of the present invention, when both the friction assembly 50 and the movable plate 60 are provided with one, the friction assembly 50 relies on the movable plate 60 and the limiting step 13 to achieve a clamping effect; when both the friction assembly 50 and the movable plate 60 are provided with multiple, multiple friction assemblies 50 rely on adjacent movable plates 60 and limiting steps 13 to achieve a clamping effect.

[0107] When multiple friction assemblies 50 and multiple movable plates 60 are provided, the first movable plate 60 includes multiple first movable plates 61. The remaining movable plates 60 may be integrally annular structures. In this case, the remaining movable plates 60 may have second positioning protrusions. The number of second positioning protrusions may be the same as or different from the number of first positioning protrusions 611. The number of second positioning protrusions in each group of the remaining movable plates 60 may be the same or different. The second positioning protrusions may be circumferentially offset from the first positioning protrusions 611, so that the assembly member 70 does not interfere with the second positioning protrusions of the remaining movable plates 60. Alternatively, the second positioning protrusions may be circumferentially aligned with the first positioning protrusions 611, so that the assembly member 70 slides through the second positioning protrusions of the remaining movable plates 60.

[0108] The remaining movable panels 60 may also be of a split design. In this case, each of the remaining movable panels 60 includes a plurality of second movable pieces distributed around the axis. The number of second movable pieces may be the same as or different from the number of first movable pieces 61. The number of second movable pieces in each group of the remaining movable panels 60 may be the same or different. The second movable pieces may have second positioning protrusions, which may be circumferentially offset from the first positioning protrusions 611 so that the assembly member 70 does not interfere with the second positioning protrusions of the remaining movable panels 60. Alternatively, the second positioning protrusions may be circumferentially aligned with the first positioning protrusions 611, and the assembly member 70 may slide through the second positioning protrusions of the remaining movable panels 60.

[0109] It can be understood that the various parts in the above embodiments can be freely combined or deleted to form different combination embodiments. The specific contents of each combination embodiment will not be repeated here. After this description, it can be considered that the specification has recorded each combination embodiment and can support different combination embodiments.

[0110] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions 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 brake, characterized in that: include: The stator has a first end face and a second end face in the axial direction, the first end face is provided with a first groove and a second groove, and the outer periphery of the stator has a limiting step, the limiting step forms a limiting space on the outer periphery of the stator toward the second end face; an armature disposed adjacent to the first end surface; a coil disposed in the first groove; a first elastic member, disposed in the second groove; A friction assembly is sleeved on the outer periphery of the stator and is located in the limited space; a movable plate, sleeved on the outer periphery of the stator and located in the limiting space, and the friction assembly is located between the movable plate and the limiting step; as well as An assembly part, fixedly connected to the armature and the movable plate; Wherein, the friction component includes: a support plate, sleeved on an outer circumference of the stator, the outer circumference of the support plate being configured to fit the target device, the support plate being provided with a plurality of receiving slots, the receiving slots penetrating the support plate along an axial direction of the support plate, and the width of the receiving slots having a decreasing trend in a centrifugal direction; and A plurality of friction blocks are respectively located in the plurality of receiving grooves, wherein the thickness of the friction blocks in the axial direction is greater than the thickness of the receiving grooves in the axial direction, and the width of the friction blocks in the centrifugal direction tends to decrease; Wherein, near the outer peripheral edge of the support plate, there is a fitting clearance between the friction block and the receiving groove in the centrifugal direction, the fitting clearance changes synchronously with the position change of the friction block, and the fitting clearance is always greater than zero during the change. When the fitting clearance is at a minimum value, in the circumferential direction of the support plate, the two side walls of the friction block abut against the two side walls of the receiving groove; Moreover, in the axial direction, the friction block of the friction assembly can abut against the movable plate and the limiting step; the coil generates a magnetic field when energized, causing the armature to overcome the elastic force of the first elastic member and move toward the stator, and the armature drives the movable plate to move away from the friction assembly, releasing the friction assembly.

2. The brake according to claim 1, characterized in that A second elastic member is provided in the receiving groove, and the second elastic member abuts against one end of the friction block, where the end is close to the inner peripheral edge of the support plate.

3. The brake according to claim 2, characterized in that The support plate is also provided with a limiting groove connected to the receiving groove, and the second elastic member is partially located in the receiving groove; a guide member is provided in the limiting groove, the second elastic member is configured as an annular structure, the second elastic member is sleeved on the guide member, and the guide member is entirely accommodated in the space of the limiting groove.

4. The brake according to claim 2, characterized in that The support plate is further provided with a clamping groove separated from the receiving groove. The second elastic member is configured as a sheet structure. The second elastic member is partially clamped in the clamping groove and partially located in the receiving groove.

5. The brake according to claim 1, wherein: The armature includes a plurality of action pieces distributed around the axis direction, the movable plate includes a plurality of first movable pieces distributed around the axis direction, and the action pieces and the first movable pieces are connected via the assembly part.

6. The brake according to claim 5, characterized in that The number of the active pieces is the same as the number of the first movable pieces. Each active piece is aligned with each first movable piece in the circumferential direction. Each active piece is connected to the corresponding first movable piece via a plurality of assembly parts.

7. The brake according to claim 5, characterized in that The number of the active plates is the same as the number of the first movable plates, each active plate is staggered with each first movable plate in the circumferential direction, and each active plate is connected to the corresponding two first movable plates via a plurality of assembly parts.

8. The brake according to claim 5, characterized in that The number of the first movable pieces is twice or more than the number of the working pieces, and each of the working pieces covers two or more of the first movable pieces in the circumferential direction; or the number of the working pieces is twice or more than the number of the first movable pieces, and every two or more of the working pieces cover one of the first movable pieces in the circumferential direction.

9. The brake according to any one of claims 5 to 8, characterized in that: The outer periphery of the stator is provided with a plurality of positioning grooves, the inner periphery of each first movable piece is provided with a first positioning protrusion adapted to the positioning groove, and the assembly part is slidably inserted into the stator from the first positioning protrusion.

10. The brake according to any one of claims 1 to 8, characterized in that: The friction assemblies and the movable plates are each provided with N, where N is an integer greater than or equal to 1, the N movable plates and the N friction assemblies are alternately arranged, the Nth movable plate is adjacent to the Nth friction assembly, the Nth friction assembly is adjacent to the limiting step, and the first movable plate is fixedly connected to the armature via the assembly member; In the axial direction, the friction block of the Nth friction assembly may abut against the Nth movable plate and the limiting step, and the friction block of each of the remaining friction assemblies may abut against two adjacent movable plates.

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