Brake

Abstract

The utility model provides a brake and belongs to the technical field of mechanical braking. An armature; a friction disc; a tailgate; a coil; a first elastic member; the manual release assembly comprises a handle, a piston piece and a second elastic piece, the handle is arranged on the outer ring of the friction disc in a surrounding mode and arranged between the armature and the tail plate, the handle is provided with a plurality of counter bores, the piston piece comprises a piston umbrella part and a piston guide part which are connected with each other, and the piston umbrella part is arranged between the handle and the armature and abuts against the counter bores in a shape matched mode; the piston guide part is arranged in the containing groove, and the second elastic piece is located between the piston guide part and the bottom wall of the containing groove. When manual release is not carried out, the second elastic piece enables the piston guide part to be far away from the stator, the piston umbrella part abuts against the counter bore, and the handle abuts against the tail plate; and during manual release, the handle is rotated, so that the umbrella part of the piston moves towards the stator under the action of the counter bore, the armature is further pushed to move towards the stator, and the friction disc is released.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical braking technology, and specifically relates to a brake. Background Technology

[0002] Stacked brakes primarily rely on the coordinated structure of a stator, coil, armature, friction disc, elastic element, and tail plate to achieve braking. The stator, armature, friction disc, and tail plate are arranged sequentially. The stator contains a coil and elastic element facing the armature. The stator and tail plate are fixed together by a steel tube and screws passing through it. The friction disc can be directly or indirectly connected to the drive shaft of the target equipment via a bushing. When the coil is de-energized, the armature moves away from the stator under the action of the elastic element, thus pressing against the friction disc and generating braking torque to brake the drive shaft of the target equipment. When the coil is energized, a magnetic field is generated around the coil, creating a magnetic force between the stator and armature. This magnetic force overcomes the force of the elastic element, attracting the armature towards the stator. The armature no longer presses against the friction disc, allowing the friction disc to rotate freely.

[0003] To enable manual release of brakes in some applications, allowing manual operation to control the braking and release of the friction disc, manual release is currently mainly achieved by adding a manual release structure. This manual release structure acts on the armature, causing the armature to overcome the force of the elastic element and move towards the stator, releasing the friction disc so that it can rotate freely.

[0004] In the prior art, the manual release structure includes a handle, a wedge, and an elastic component. The handle is positioned between the armature and the tail plate and surrounds the outer ring of the friction disc. The wedge is positioned between the handle and the tail plate, with its head located in the tapered hole of the tail plate. The elastic component is located in the stator and includes a ball, a piston, and a piston spring. The ball presses the handle against the piston spring, ensuring that the handle is close to the tail plate. When the handle is rotated, the wedge slides along the inclined surface of the tapered hole, thereby abutting against the armature and pushing the armature to move closer to the stator, so that the friction disc is no longer pressed and can rotate freely.

[0005] During the rotation of the handle, the wedges move along the tapered hole of the tailplate, causing displacement of the handle in the axial direction. Since the actual dimensions of the parts usually have tolerances, the moving speed of multiple wedges along the tapered hole is not the same, and the handle will deflect relative to the axial direction. When the handle comes into contact with the steel tube, a large friction force will be generated. Long-term wear will cause grooves to form in the steel tube, and in severe cases, the handle will jam and cannot be manually released. Utility Model Content

[0006] The purpose of this invention is to provide a brake that solves the technical problem in the prior art where the handle deflects relative to the axis, generates a large frictional force when the handle contacts the steel tube, and causes grooves to form on the steel tube over time due to wear, which can lead to the handle getting stuck and unable to be manually released.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] This utility model provides a brake, comprising: a stator having a receiving groove; an armature disposed adjacent to the stator; a friction disc disposed adjacent to the armature; a tail plate disposed adjacent to the friction disc and fixed to the stator; a coil disposed within the stator; and a first elastic member disposed within the stator and abutting against the armature. When the coil is energized, it generates a magnetic field. Under the action of the magnetic field, a magnetic force is generated in the gap between the stator and the armature, causing the armature to move towards the stator against the elastic force of the first elastic member. ; and a manual release assembly, including a handle, a piston, and a second elastic member, wherein the handle is arranged around the outer ring of the friction disc and between the armature and the tail plate, the side of the handle near the armature has several countersunk holes, the piston includes a piston umbrella and a piston guide connected to each other, the piston umbrella is arranged between the handle and the armature and is adapted to abut against the shape of the countersunk holes, the piston guide is arranged in the receiving groove, and the second elastic member is located between the piston guide and the bottom wall of the receiving groove;

[0009] When not manually released, the second elastic element causes the piston umbrella to abut against the countersunk hole, and the handle abuts against the tail plate. At this time, the piston umbrella does not contact the armature. When manually released, the handle is rotated, causing the piston umbrella to move toward the stator under the action of the countersunk hole. At this time, the piston umbrella abuts against the armature, thereby pushing the armature toward the stator, so that the friction disc is released.

[0010] In one possible implementation, the countersunk hole has a tapered surface, and the tapered surface of the piston umbrella portion is adapted to abut against the tapered surface of the countersunk hole. The tapered surface of the piston umbrella portion and the tapered surface of the countersunk hole may have the same or different taper.

[0011] In one possible implementation, the piston guide portion has a groove at its end opposite to the piston umbrella portion, and the second elastic member is received in the groove.

[0012] In one possible implementation, the manual release assembly further includes a pad disposed between the handle and the tailplate, the handle abutting against the tailplate via the pad.

[0013] In one possible implementation, the pad includes a clamping part and a snap-fit ​​part connected to each other, the handle has a snap-fit ​​hole, the projected area of ​​the clamping part in the axial direction of the stator is larger than the projected area of ​​the snap-fit ​​part in the axial direction of the stator, the clamping part is disposed between the handle and the tail plate, and the snap-fit ​​part is adapted to snap into the snap-fit ​​hole.

[0014] In one possible implementation, the tail plate is fixed to the stator by a steel tube and a connector passing through the steel tube, the armature has a first clearance opening to avoid the piston guide, the handle has a second clearance opening to avoid the steel tube, and the countersunk hole and the snap-fit ​​hole are connected in the axial direction of the stator.

[0015] In one possible implementation, the brake further includes a microswitch disposed on the outer periphery of the stator, the microswitch being connected in series with the coil, or in parallel with the coil, or configured to be connected to a controller, the microswitch being triggered by the handle during rotation.

[0016] In one possible implementation, the micro switch has a sensing part, and the handle has an abutment part that can contact or separate from the sensing part.

[0017] In one possible implementation, the outer peripheral surface of the tail plate protrudes beyond the outer peripheral surface of the stator, and the micro switch is attached to the end face of the tail plate facing the stator.

[0018] In one possible implementation, the micro switch is fixedly assembled to the outer peripheral surface of the stator by a fastener.

[0019] The brake provided by this utility model has at least the following technical effects: Compared with the prior art, in this brake, the manual release component includes a handle, a piston, and a second elastic component. The cooperation between the countersunk hole and the piston umbrella ensures that the handle only rotates during the release process without displacement in the axial direction, reducing wear between the handle and the steel tube, thereby avoiding frictional noise during rotation, preventing the handle from jamming, and increasing the service life of the manual release component. Furthermore, since the countersunk hole is located on the handle and the receiving groove is located on the stator, the hole structure for manual release is only opened on the handle and the stator. There is no need to process the hole structure for manual release on the tail plate. The number of holes in the entire brake is reduced, the processing cost is lower, and the handle strength is greater. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a three-dimensional structural diagram of a brake provided in an embodiment of the present utility model;

[0022] Figure 2 for Figure 1 A magnified view of a portion of the brake at point A;

[0023] Figure 3 for Figure 1 A cross-sectional schematic diagram of the brake shown.

[0024] Figure 4 for Figure 1 Another cross-sectional view of the brake shown;

[0025] Figure 5 for Figure 4 A partially enlarged schematic diagram of the brake at point B;

[0026] Figure 6 for Figure 1 A three-dimensional structural diagram of the brake handle shown;

[0027] Figure 7 for Figure 1 A three-dimensional structural diagram of the piston component of the brake shown.

[0028] Figure 8 for Figure 1 A three-dimensional structural diagram of the pad block of the brake shown.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Brake; 10. Stator; 11. Receiving groove; 20. Armature; 21. First clearance opening; 30. Friction disc; 40. Tail plate; 50. Coil; 60. First elastic element; 70. Manual release assembly; 71. Handle; 711. Countersunk hole; 712. Second clearance opening; 713. Abutment part; 72. Piston part; 721. Piston umbrella part; 722. Piston guide part; 7221. Groove; 73. Second elastic element; 74. Pad; 741. Pressing part; 742. Snap-fit ​​part; 80. Micro switch; 81. Sensing part; 90. Steel tube; 91. Connector; 100. Fastener. Detailed Implementation

[0031] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0032] It should be noted that when an element is referred to as "fixed to," "fixed," "connected to," "connected to," "set on," "set on," or "fixed to" another element, an intervening element may or may not be present. Furthermore, when an element is referred to as "connected to" or "connected to" another element, it can be interpreted, according to the conventional understanding of those skilled in the art, as a mechanical connection, electrical connection, communication connection, etc. In this document, "multiple" refers to two or more items; "several" refers to one or more items.

[0033] Unless otherwise defined, 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 pertains.

[0034] Please refer to the following: Figures 1 to 8 The brake 1 provided in the embodiments of this utility model will now be described.

[0035] Please see Figures 1 to 5This utility model provides a brake 1, comprising: a stator 10 having a receiving groove 11; an armature 20 disposed adjacent to the stator 10; a friction disc 30 disposed adjacent to the armature 20; a tail plate 40 disposed adjacent to the friction disc 30 and fixed to the stator 10; a coil 50 disposed within the stator 10; a first elastic member 60 disposed within the stator 10 and abutting against the armature 20, wherein the coil 50 generates a magnetic field when energized, and under the action of the magnetic field, a magnetic force is generated in the gap between the stator 10 and the armature 20, causing the armature 20 to move towards the stator 10 against the elastic force of the first elastic member 60; and a manual release assembly 70, comprising a handle 71, a piston 72, and a second elastic member 73, wherein the handle 71 is disposed around the outer ring of the friction disc 30 and between the armature 20 and the tail plate 40, and the handle 71 is close to one side of the armature 20. The piston component 72 has several countersunk holes 711 on its side. The piston component 72 includes a piston umbrella part 721 and a piston guide part 722 connected to each other. The piston umbrella part 721 is located between the handle 71 and the armature 20 and is adapted to abut against the shape of the countersunk hole 711. The piston guide part 722 is located in the receiving groove 11. The second elastic member 73 is located between the piston guide part 722 and the bottom wall of the receiving groove 11. When not manually released, the second elastic member 73 causes the piston umbrella part 721 to abut against the countersunk hole 711 and the handle 71 to abut against the tail plate 40. At this time, the piston umbrella part 721 does not contact the armature 20. When manually released, the handle 71 is rotated, causing the piston umbrella part 721 to move toward the stator 10 under the action of the countersunk hole 711. At this time, the piston umbrella part 721 abuts against the armature 20, and then the piston umbrella part 721 pushes the armature 20 to move toward the stator 10, so that the friction disc 30 is released.

[0036] It is understandable that the shape of the countersunk hole 711 that is adapted to the piston umbrella part 721 can be a conical surface, an arc, or other shapes, as long as it can cause the piston umbrella part 721 to produce axial displacement.

[0037] Compared with the prior art, the brake 1 provided in this embodiment of the present invention has at least the following technical effects: In the brake 1, the manual release component 70 includes a handle 71, a piston 72, and a second elastic component 73. The cooperation between the countersunk hole 711 and the piston umbrella 721 ensures that the handle 71 only rotates during the release process without displacement in the axial direction, reducing wear between the handle 71 and the steel tube 90, thereby avoiding frictional noise during rotation, preventing the handle 71 from jamming, and increasing the service life of the manual release component 70. Furthermore, since the countersunk hole 711 is located on the handle 71 and the receiving groove 11 is located on the stator 10, the hole structure for manual release is only opened on the handle 71 and the stator 10. The tail plate 40 does not need to be machined with a hole structure for manual release. The entire brake 1 has fewer openings, lower processing costs, and greater handle 71 strength.

[0038] The specific structure of the manual release component 70 is illustrated below, but it is not limited to the following embodiments.

[0039] Please see Figure 4 and Figure 5 In some embodiments, the countersunk hole 711 has a tapered surface, and the tapered surface of the piston umbrella 721 is adapted to abut against the tapered surface of the countersunk hole 711. The tapered surface of the piston umbrella 721 and the tapered surface of the countersunk hole 711 may have the same or different taper. The piston umbrella 721 may have a tapered surface adapted to the tapered surface of the countersunk hole 711, and the tapered surfaces of the two maintain the same taper. This allows the handle 71 to rotate smoothly during rotation, and allows the piston umbrella 721 to drive the piston guide 722 to move smoothly in the axial direction, thereby reducing frictional noise between the handle 71 and the piston umbrella 721, and reducing frictional noise between the piston umbrella 721 and the armature 20.

[0040] Of course, in other embodiments, the tapered surface of the piston umbrella 721 may have a different taper than the tapered surface of the countersunk hole 711, and the tapered surface may be composed of one or more surfaces with different tapers.

[0041] To improve the reliability of the second elastic element 73, please refer to [link / reference needed]. Figure 5 and Figure 7 In some embodiments, a groove 7221 is formed at the end of the piston guide 722 opposite to the piston umbrella portion 721, and the second elastic member 73 is received within the groove 7221. Since the second elastic member 73 can be placed within the groove 7221, compared to the existing method of stacking them at the end of the piston guide 722, the overall length of the piston guide 722 and the second elastic member 73 can be significantly reduced, thereby making the total thickness of the brake 1 smaller. At the same time, it also increases the stability and reliability of the second elastic member 73 during the stretching and compression process, and reduces the instability caused by the deflection of the second elastic member 73.

[0042] Please see Figure 4 , Figure 5 and Figure 8 In some embodiments, the manual release assembly 70 further includes a pad 74 disposed between the handle 71 and the tail plate 40. The handle 71 abuts against the tail plate 40 via the pad 74, and the pad 74 and the piston 72 are coaxial. The pad 74 is relatively small in size, which allows for a smaller gap between the handle 71 and the tail plate 40. During the rotation of the handle 71, friction occurs between the pad 74 and the tail plate 40, resulting in less frictional resistance.

[0043] For example, the pad 74 includes a clamping part 741 and a snap-fit ​​part 742 connected to each other. The handle 71 has a snap-fit ​​hole. The projected area of ​​the clamping part 741 in the axial direction of the stator 10 is larger than the projected area of ​​the snap-fit ​​part 742 in the axial direction of the stator 10. The clamping part 741 is disposed between the handle 71 and the tail plate 40, and the snap-fit ​​part 742 is adapted to snap into the snap-fit ​​hole of the handle 71. In this embodiment, the clamping part 741 is flat, so that there is a small gap between the handle 71 and the tail plate 40. The snap-fit ​​part 742 is adapted to snap into the snap-fit ​​hole of the handle 71, ensuring that the pad 74 will not slide relative to the handle 71 during movement. In this embodiment, the countersunk hole 711 and the snap-fit ​​hole can be aligned and connected in the axial direction to reduce the number of holes to be drilled.

[0044] Of course, in other embodiments, the pad 74 may not be snapped into the handle 71, but may be adapted to snap into the hole of the tail plate 40 adjacent to the countersunk hole 711; the pad 74 and the piston 72 may not be set on the same axis, and the snap-fit ​​hole for installing the pad 74 and the countersunk hole 711 may be offset in the axial direction.

[0045] Please see Figure 5 and Figure 6 In some embodiments, the tail plate 40 is fixed to the stator 10 by a steel tube 90 and a connector 91 passing through the steel tube 90. The armature 20 has a first clearance opening 21 to avoid the piston guide 722, and the handle 71 has a second clearance opening 712 to avoid the steel tube 90. The countersunk hole 711 and the snap-fit ​​hole are connected axially in the stator 10. In this embodiment, the first clearance opening 21 to avoid the piston guide 722 can be directly opened based on the original radial dimension of the armature 20 without reducing the radial dimension of the armature 20. The handle 71 has a second clearance opening 712 to avoid the steel tube 90, ensuring that the handle 71 has a larger radial dimension to open several tapered holes.

[0046] The following example illustrates how the handle 71 triggers control, but is not limited to the following embodiments.

[0047] Please see Figure 1 and Figure 2 In some embodiments, the brake 1 further includes a micro switch 80 disposed on the outer periphery of the stator 10. The micro switch 80 is connected in series with the coil 50, or in parallel with the coil 50, or configured to be connected to a controller. The handle 71 can trigger the micro switch 80 during rotation. By setting the micro switch 80, the handle 71 can transmit a signal that the friction disc 30 is released or pressed when rotated.

[0048] Specifically, the micro switch 80 can be connected in series with the coil 50, in which case the micro switch 80 can control the energization and de-energization of the coil 50; the micro switch 80 can also be connected in parallel with the coil 50, in which case the micro switch 80 can adjust the current signal of the coil 50; the micro switch 80 can also be connected to the controller instead of the coil 50, and after being triggered by the handle 71, it can provide the controller with a signal of the current posture of the handle 71, so that the controller can determine and control the opening and closing of the micro switch 80.

[0049] It is understandable that the handle 71 can be configured to indicate that the friction disc 30 is in a released state when the micro switch 80 is triggered, and that the friction disc 30 is in a pressed state when the handle 71 is removed from the micro switch 80; alternatively, the handle 71 can be configured to indicate that the friction disc 30 is in a pressed state when the micro switch 80 is triggered, and that the friction disc 30 is in a released state when the handle 71 is removed from the micro switch 80. The triggering method depends primarily on the initial position of the handle 71.

[0050] For easy triggering of micro switch 80 by handle 71, please refer to Figure 1 , Figure 2 and Figure 6 In some embodiments, the micro switch 80 has a sensing part 81, and the handle 71 has an abutment part 713, which can contact or separate from the sensing part 81. The sensing part 81 can be a sheet-like, block-like, or strip-like structure, and the abutment part 713 can also be a sheet-like, block-like, or strip-like structure. During the rotation of the handle 71, the abutment part 713 can contact or separate from the sensing part 81 to indicate that the friction disc 30 is in a released or pressed position.

[0051] For example, it can be set that when the handle 71 triggers the micro switch 80, it indicates that the friction disk 30 is in a released state. Specifically, when the handle 71 is not rotated to release, the abutment part 713 moves away from the sensing part 81; when the handle 71 is rotated to release, the abutment part 713 gradually moves closer to the sensing part 81; when the release is completed, the abutment part 713 presses against the sensing part 81, and the sensing part 81 enables the micro switch 80 to obtain a corresponding signal through mechanical or electronic communication, thereby realizing the on / off control of the micro switch 80.

[0052] The existing micro switch 80 is approximately rectangular in shape and is usually fixed to the stator 10 by multiple screws, which requires more holes to be made in the stator 10.

[0053] For this purpose, please refer to Figure 1 and Figure 2In some embodiments, the outer peripheral surface of the tail plate 40 protrudes beyond the outer peripheral surface of the stator 10, and the micro switch 80 is abutted against the end face of the tail plate 40 facing the stator 10. That is, by reducing the radial dimension of the stator 10 or increasing the radial dimension of the tail plate 40, the outer peripheral surface of the tail plate 40 protrudes beyond the outer peripheral surface of the stator 10, thereby providing radial mounting space for the tail plate 40. By abutting the micro switch 80 against the end face of the tail plate 40 facing the stator 10, a constraint on the degree of freedom of the micro switch 80 is formed, thereby reducing the amount of screws used and the number of openings in the stator 10, making the total weight of the brake 1 lighter. Since the micro switch 80 is located on the outer peripheral surface of the stator 10, it does not increase the thickness of the brake 1, making the total thickness of the brake 1 thinner.

[0054] For example, the micro switch 80 is fixedly assembled to the outer peripheral surface of the stator 10 by a fastener 100. Since the tail plate 40 has already limited the degrees of freedom of the micro switch 80 to a certain extent, the micro switch 80 can be fixed to the outer peripheral surface of the stator 10 by a single fastener 100, thereby constraining all the degrees of freedom of the micro switch 80.

[0055] It is understood that the parts in the above embodiments can be freely combined or deleted to form different combined embodiments. The specific contents of each combined embodiment will not be repeated here. After this description, it can be considered that the specification has recorded each combined embodiment and can support different combined embodiments.

[0056] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A brake, characterized in that, include: The stator has a receiving slot; An armature is disposed adjacent to the stator; A friction disc is disposed adjacent to the armature; The tail plate is disposed adjacent to the friction disc and is fixed to the stator; The coil is located within the stator; The first elastic element is disposed inside the stator and abuts against the armature. When the coil is energized, it generates a magnetic field. Under the action of the magnetic field, the gap between the stator and the armature generates a magnetic force, causing the armature to overcome the elastic force of the first elastic element and move toward the stator. as well as The manual release assembly includes a handle, a piston, and a second elastic member. The handle surrounds the outer ring of the friction disc and is located between the armature and the tail plate. The side of the handle near the armature has several countersunk holes. The piston includes a piston umbrella and a piston guide connected to each other. The piston umbrella is located between the handle and the armature and is adapted to abut against the shape of the countersunk holes. The piston guide is located in the receiving groove. The second elastic member is located between the piston guide and the bottom wall of the receiving groove. When not manually released, the second elastic element causes the piston umbrella to abut against the countersunk hole, and the handle abuts against the tail plate. At this time, the piston umbrella does not contact the armature. When manually released, the handle is rotated, causing the piston umbrella to move toward the stator under the action of the countersunk hole. At this time, the piston umbrella abuts against the armature, thereby pushing the armature toward the stator, so that the friction disc is released.

2. The brake according to claim 1, characterized in that, The countersunk hole has a tapered surface, and the tapered surface of the piston umbrella part is adapted to abut against the tapered surface of the countersunk hole. The tapered surface of the piston umbrella part and the tapered surface of the countersunk hole may have the same or different taper.

3. The brake according to claim 1, characterized in that, The piston guide portion has a groove at the end opposite to the piston umbrella portion, and the second elastic element is received in the groove.

4. The brake according to claim 1, characterized in that, The manual release assembly also includes a pad, which is disposed between the handle and the tail plate, and the handle abuts against the tail plate through the pad.

5. The brake according to claim 4, characterized in that, The pad includes a pressing part and a snap-fit ​​part connected to each other. The handle has a snap-fit ​​hole. The projected area of ​​the pressing part on the axial direction of the stator is larger than the projected area of ​​the snap-fit ​​part on the axial direction of the stator. The pressing part is located between the handle and the tail plate. The snap-fit ​​part is adapted to snap into the snap-fit ​​hole.

6. The brake according to claim 5, characterized in that, The tail plate is fixed to the stator by a steel tube and a connector passing through the steel tube. The armature has a first clearance opening to avoid the piston guide portion, and the handle has a second clearance opening to avoid the steel tube. The countersunk hole and the snap-fit ​​hole are connected in the axial direction of the stator.

7. The brake according to claim 1, characterized in that, It also includes a micro switch located on the outer periphery of the stator, the micro switch being connected in series with the coil, or in parallel with the coil, or configured to be connected to a controller, the micro switch being triggered during the rotation of the handle.

8. The brake according to claim 7, characterized in that, The micro switch has a sensing part, and the handle has an abutting part, which can contact or separate from the sensing part.

9. The brake according to claim 7 or 8, characterized in that, The outer peripheral surface of the tail plate protrudes from the outer peripheral surface of the stator, and the micro switch is attached to the end face of the tail plate facing the stator.

10. The brake according to claim 9, characterized in that, The micro switch is fixedly assembled to the outer peripheral surface of the stator by a fastener.

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