Brake disc, armature, brake and motor

Abstract

This application relates to a brake disc, an armature, a brake, and a motor. The brake disc includes a brake disc body, a first braking part, and a second braking part. The brake disc body includes a first disc structure. The first braking part is coaxially disposed on the first disc structure and has friction pads. The second braking part is coaxially disposed on the first disc structure and has a first rotation limiting structure. The first and second braking parts are used to contact the armature. The brake disc provided by this application has friction pads in its first braking part, which can be used to contact the armature during braking to generate frictional torque and achieve braking. The second braking part has a first rotation limiting structure, which can be used to contact the armature during braking to limit the rotation of the brake disc body. This adds an additional braking torque on top of braking through frictional torque, enabling emergency braking. It also prevents the friction pads from softening and wearing due to prolonged operation, thus preventing brake disc and brake failure.

Description

Technical Field

[0001] This application relates to the field of braking technology, and in particular to a brake disc, armature, brake, and motor. Background Technology

[0002] In order to drive the actuator, the existing technology often uses a motor (such as a servo motor) to connect to the actuator, and the rotation of the motor shaft in the motor provides rotational power to the actuator.

[0003] When it is necessary to stop the rotation of the actuator, the motor brake must be able to achieve emergency braking to avoid excessive rotational stroke during the braking process, which could lead to unnecessary collisions between the actuator and the outside world and cause safety hazards.

[0004] Existing servo motor brakes typically include a brake disc and an armature. During braking, the brake disc and armature approach each other, and the armature contacts the friction pads on the brake disc, generating a braking torque that stops the rotation of the brake disc and the motor shaft connected to it. However, the braking torque provided by the friction pads is relatively small, resulting in a long braking time and failing to achieve the effect of emergency braking. When the friction pads operate for an extended period, the heat generated by friction softens the friction pad material on the brake disc, causing adhesive wear and potentially leading to brake disc failure, thus preventing effective braking in conjunction with the armature. Summary of the Invention

[0005] This application provides a brake disc, armature, brake, and motor to solve the technical problems in the prior art where the braking torque is small and the braking time is long when the brake disc only uses friction pads for braking, and the braking failure is easily caused by the softening and wear of the friction pads.

[0006] In a first aspect, this application provides a brake disc, comprising:

[0007] Brake disc body, the brake disc body includes a first disc structure;

[0008] The first braking part is coaxially disposed on the first disc structure and has a friction plate.

[0009] The second braking part is coaxially disposed on the first disc structure, and the second braking part has a first rotation limiting structure;

[0010] The first and second braking parts are used to contact the armature.

[0011] Optionally, the first braking part has an annular groove, the bottom of the annular groove is provided with a friction plate, and a sealing element is embedded on the side wall of the annular groove.

[0012] Optionally, a guide structure is provided on the sidewall of the annular groove.

[0013] Optionally, the guide structure is provided with a mounting groove, and the seal is embedded in the mounting groove, with at least a portion of the seal protruding from the mounting groove.

[0014] Optionally, the first rotational limiting structure includes a ratchet assembly and / or a pawl assembly.

[0015] Optionally, when the first rotation limiting structure includes a ratchet assembly and a pawl assembly arranged coaxially, the ratchet assembly is used to limit the rotation of the brake disc body in a first direction, and the pawl assembly is used to limit the rotation of the brake disc body in a second direction, wherein the first direction is opposite to the second direction.

[0016] Alternatively, when the first rotation limiting structure includes two coaxially arranged ratchet assemblies, one ratchet assembly is used to limit the rotation of the brake disc body in a first direction, and the other ratchet assembly is used to limit the rotation of the brake disc body in a second direction;

[0017] Alternatively, when the first rotation limiting structure includes two coaxially arranged pawl assemblies, one pawl assembly is used to limit the rotation of the brake disc body in a first direction, and the other pawl assembly is used to limit the rotation of the brake disc body in a second direction.

[0018] Optionally, the ratchet assembly includes a plurality of ratchet teeth arranged circumferentially along the first disk structure, the ratchet teeth extending axially along the first disk structure.

[0019] Optionally, the pawl assembly includes a pawl and a first elastic element. Multiple pawls are arranged circumferentially along the first disk structure. The pawls are rotatably mounted on the first disk structure. The rotation axis of the pawls is parallel to the radial direction of the first disk structure. The first elastic element is connected between the pawls and the first disk structure.

[0020] Optionally, the pawl includes a connected post and an arc plate, with the first elastic element and the arc plate respectively connected to both sides of the post.

[0021] Optionally, the column has a clearance section on the side away from the arc plate.

[0022] Optionally, the pawl assembly also includes a hinged bracket on which the column is rotatably mounted.

[0023] Secondly, this application provides an armature for cooperating with the brake disc provided in the first aspect of this application, comprising:

[0024] The armature body includes a second disc structure;

[0025] The third braking part is coaxially mounted on the second disc structure and is used for friction pad contact.

[0026] The fourth braking unit has a second rotation limiting structure, which is matched with the first rotation limiting structure.

[0027] Optionally, the third braking part and the first braking part are in a concave-convex fit.

[0028] Optionally, the third braking part has an abutment portion, on which a braking coating is provided.

[0029] Optionally, the cross-sectional shape of the abutment portion is rectangular or trapezoidal.

[0030] Thirdly, this application provides a brake, comprising:

[0031] The brake disc provided in the first aspect of this application;

[0032] The armature provided in the second aspect of this application;

[0033] The brake mounting base has an internal cavity for accommodating the brake disc body and the armature body. The brake disc body and the armature body are arranged opposite to each other, and the armature body can slide along its axial direction in the cavity. The brake mounting base has an electromagnetic coil and a second elastic element. Both the electromagnetic coil and the second elastic element are arranged on the side of the armature body away from the brake disc body. The second elastic element abuts between the armature body and the brake mounting base.

[0034] Fourthly, this application provides an electric motor, including the brake provided in the third aspect of this application.

[0035] The technical solutions provided in this application have the following advantages compared with the prior art:

[0036] The brake disc provided in this application embodiment has a first braking part on the brake disc body with friction pads, which can be used to contact the armature during braking to generate frictional torque and achieve braking; the second braking part on the brake disc body has a first rotation limiting structure, which can be used to contact the armature during braking to limit the rotation of the brake disc body. In addition to braking by frictional torque, an extra braking torque is added, so that the overall braking torque of the brake is improved, the braking time is reduced, and emergency braking can be achieved. At the same time, it can avoid the friction pads from softening and wearing due to long-term work, and avoid brake disc and brake failure. Attached Figure Description

[0037] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0038] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0040] Figure 1 A cross-sectional view of the brake provided in an embodiment of this application;

[0041] Figure 2 A partial cross-sectional view of the brake disc provided in an embodiment of this application;

[0042] Figure 3 A partial structural schematic diagram of the brake disc provided in an embodiment of this application;

[0043] Figure 4 This is a schematic diagram of the armature structure provided in the embodiments of this application;

[0044] Figure 5 Provided for the embodiments of this application Figure 1 Enlarged detail of section A;

[0045] Figure 6 This is a schematic diagram of the pawl assembly provided in an embodiment of this application;

[0046] Figure 7 A top view of the first pawl provided in an embodiment of this application;

[0047] Figure 8 A top view of the second pawl provided in an embodiment of this application;

[0048] Figure 9 Provided for the embodiments of this application Figure 4 Enlarged detail view of section B;

[0049] Figure 10 This is a schematic diagram illustrating the cooperation between the first braking unit and the third braking unit provided in an embodiment of this application.

[0050] Explanation of reference numerals in the attached figures:

[0051] 1. Brake disc body; 11. First disc structure; 12. Connecting part;

[0052] 2. First braking part; 21. Friction plate; 21a. First friction plate; 21b. Second friction plate; 21c. Third friction plate; 22. Annular groove; 22a. First annular groove; 22b. Second annular groove; 22c. Third annular groove; 221. Guide structure; 222. Mounting groove; 23. Seal;

[0053] 3. Ratchet assembly; 3a. First ratchet assembly; 3b. Second ratchet assembly; 31. Ratchet tooth; 31a. First ratchet tooth; 31b. Second ratchet tooth; 311. Limiting surface;

[0054] 4. Pawl assembly; 4a. First pawl assembly; 4b. Second pawl assembly; 41. Pawl; 41a. First pawl; 41b. Second pawl; 411. Post; 4111. Clearance part; 412. Arc plate; 412a. First arc plate; 412b. Second arc plate; 42. First elastic element; 43. Hinge bracket; 431. Mounting bracket; 432. Rotating pin;

[0055] 5. Armature body; 51. Second disc structure;

[0056] 6. Third braking part; 61. Abutting part; 61a. First abutting part; 61b. Second abutting part; 61c. Third abutting part;

[0057] 7. Brake mounting base; 71. Electromagnetic coil; 72. Second elastic element; 73. Brake base; 74. Mounting plate; 75. Mounting screw; 76. Lubricating pad. Detailed Implementation

[0058] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0059] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0060] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0061] Currently, the mainstream servo motor brakes work by the following principle: when the brake is energized, the electromagnetic coil generates a magnetic field that attracts the armature, causing it to disengage from the brake disc and releasing the motor from braking, allowing it to operate normally. When the coil is de-energized, the armature moves towards the brake disc under the force of a spring, contacting the friction pads on the brake disc and putting the motor into braking mode. The friction pads on the brake disc are divided into rubber-based and paper-based friction pads, which provide relatively low frictional torque, resulting in a longer braking time. If the friction pads operate for a long time, the ambient temperature between the brake disc and the armature rises, causing the friction pad material to soften. This leads to adhesive wear on the friction pads, potentially causing brake disc failure and preventing it from engaging with the armature to achieve braking. Consequently, the brake fails, which is extremely detrimental to the performance of the motor and the safe operation of related equipment connected to the motor.

[0062] To address the technical problems of low braking torque, long braking time, and easy braking failure due to softening and wear of the friction pads when the brake disc brakes only rely on the friction pads in the prior art, this application provides a brake disc, armature, brake, and motor that can simultaneously contact the armature with the first braking part 2 and the second braking part on the brake disc, thereby increasing the braking torque, reducing the braking time, avoiding softening and wear of the friction pads 21, and enabling emergency braking of the motor.

[0063] Please see Figures 1 to 10 The first aspect of this application provides a brake disc, including: a brake disc body 1, a first braking part 2, and a second braking part. The brake disc body 1 includes a first disc structure 11, which can rotate with the rotation of the motor shaft. When the rotation of the first disc structure 11 is restricted, the motor shaft cannot rotate either, thereby realizing the braking of the motor and the actuator.

[0064] The first braking part 2 is coaxially disposed on the first disc structure 11. The first braking part 2 has a friction plate 21, which can be used to press and contact the armature during braking to generate frictional torque and achieve braking.

[0065] The second braking unit is coaxially mounted on the first disc structure 11 and concentrically positioned with the first braking unit 2. The second braking unit has a first rotation limiting structure, which can contact the armature during braking to restrict the rotation of the brake disc body 1 (i.e., the first disc structure 11). This adds an extra braking torque to the braking force achieved through friction torque, thus increasing the overall braking torque of the brake and reducing braking time. This enables emergency braking and prevents the friction pads 21 from softening and wearing due to prolonged operation, preventing brake disc and brake failure. Figure 1 As shown.

[0066] It should be noted that, in order to achieve synchronous rotation between the brake disc body 1 and the motor shaft, the brake disc body 1 also includes a connecting part 12 coaxially arranged with the first disc structure 11, such as... Figure 1 and Figure 2 As shown, the connecting part 12 is provided with a toothed groove for connecting with the motor shaft to prevent relative rotation between the motor shaft and the connecting part 12, thereby causing brake failure.

[0067] It should be noted that the first braking part 2 and the second braking part are arranged in a concentric ring structure on the first disc structure 11. The number and size of the first braking part 2 and the second braking part can be determined according to actual needs. The size of the friction plate 21 provided in the first braking part 2 can be determined according to the size of the first braking part 2.

[0068] When braking is performed using the existing brake technology, if there is oil leakage from the motor, the grease will enter the gap between the friction pad 21 and the armature, causing the friction coefficient of the friction pad 21 surface to decrease, making it impossible for the brake disc to cooperate with the armature to achieve braking, resulting in brake failure.

[0069] To address the aforementioned issues, please refer to some embodiments of this application. Figure 1 , Figure 5 and Figure 10The first braking part 2 has an annular groove 22, with a friction plate 21 at the bottom of the groove. A sealing element 23 is embedded in the side wall of the annular groove 22. When the armature contacts the friction plate 21 in the annular groove 22, the sealing element 23 seals the gap between the armature and the annular groove 22. When the motor leaks oil, grease is difficult to enter the recessed annular groove 22, preventing grease from contacting the friction plate 21 at the bottom of the groove. When the armature is inserted into the annular groove 22, the sealing element 23 seals the gap between the armature and the annular groove 22, preventing oil or other foreign matter from entering the annular groove 22 and preventing the friction coefficient of the friction plate 21 from decreasing or being damaged due to oil or other foreign matter when it contacts the armature. Specifically, the sealing element 23 is an O-ring, which can be embedded in the annular side wall of the annular groove 22. Figure 2 As shown.

[0070] It should be noted that the number of annular grooves 22 in the first braking part 2 can be set according to actual needs. When multiple friction pads 21 are required to increase the friction area, the first braking part 2 includes multiple concentrically arranged annular grooves 22. In a specific embodiment of this application, the first braking part 2 includes a first annular groove 22a and a second annular groove 22b respectively disposed in the central region and the edge region of the first disc structure 11. The bottom of the first annular groove 22a is provided with a first friction pad 21a, and the bottom of the second annular groove 22b is provided with a second friction pad 21b. They can simultaneously contact the armature for braking, which can effectively increase the total area of ​​the friction pads 21 on the brake disc, which is beneficial to increase the braking torque. At the same time, it ensures that a uniform braking torque is applied to the center and edge of the brake disc body 1, avoiding the situation of severe wear of local friction pads 21.

[0071] As the brake disc body 1 rotates with the motor shaft, vibration may cause the axis of the brake disc body 1 to not coincide with the axis of the armature. In this case, the armature cannot be accurately inserted into the annular groove 22, which means that the armature cannot contact the friction plate 21 at the bottom of the annular groove 22 to achieve braking.

[0072] To resolve the above issues, please refer to Figure 5 and Figure 10 In some embodiments of this application, a guide structure 221 is provided on the side wall of the annular groove 22. Specifically, the guide structure 221 includes an inclined surface or an arc surface, so that the groove opening size of the annular groove 22 is larger than the groove bottom size, which facilitates the armature to be inserted into the annular groove 22, thereby contacting the friction plate 21 at the bottom of the annular groove 22 to achieve braking.

[0073] In the above embodiment, if the sealing element 23 is located close to the bottom of the annular groove 22, the armature may press the sealing element 23 onto the friction plate 21 as the armature moves closer to the brake disc body 1. As the friction plate 21 rotates with the brake disc body 1, it may cause wear to the sealing element 23.

[0074] To avoid the above problems, it is preferable to position the seal 23 near the opening of the annular groove 22. Please refer to [link / reference]. Figure 5 and Figure 10 In some embodiments of this application, the guide structure 221 is provided with a mounting groove 222, and the seal 23 is embedded in the mounting groove 222. At least a portion of the seal 23 protrudes from the mounting groove 222 to contact the armature and achieve a seal. Because the guide structure 221 is close to the opening of the annular groove 22, the armature is less likely to squeeze the seal 23 mounted on the guide structure 221 against the friction plate 21, thus achieving a seal between the armature and the annular groove 22 while avoiding wear on the seal 23.

[0075] To further secure the seal 23, it can be glued to the mounting groove 222 to prevent the seal 23 from falling off during braking.

[0076] In the above embodiments, the first rotation limiting structure can be a buffer structure capable of contacting the armature, generating a force that restricts further rotation of the first disk structure 11 when in contact with the armature. For some embodiments of this application, please refer to... Figure 1 , Figure 2 and Figure 4 The first rotation limiting structure includes a ratchet assembly 3 and / or a pawl assembly 4. At this time, the armature is provided with a second rotation limiting structure that matches the first rotation limiting structure. The second rotation limiting structure also includes a ratchet assembly 3 and / or a pawl assembly 4. Specifically, when the brake disc body 1 is provided with a ratchet assembly 3, the armature is provided with a pawl assembly 4 for engaging with the ratchet assembly 3 on the brake disc body 1. When the brake disc body 1 is provided with a pawl assembly 4, the armature is provided with a ratchet assembly 3 for engaging with the pawl assembly 4 on the brake disc body 1. The characteristic that the ratchet assembly 3 and the pawl assembly 4 can only rotate in one direction when engaged achieves rotational braking of the armature on the brake disc body 1.

[0077] It should be noted that since the motor shaft can usually achieve bidirectional rotation (i.e., forward and reverse rotation), if the motor shaft is in the forward rotation state during braking, the first rotation limit structure should include a ratchet assembly 3 or a pawl assembly 4 that can only make the motor shaft rotate in the reverse direction; if the motor shaft is in the reverse rotation state during braking, the first rotation limit structure should also include a ratchet assembly 3 or a pawl assembly 4 that can only make the motor shaft rotate in the forward direction. Therefore, when bidirectional braking of the motor shaft is required, the total number of ratchet assemblies 3 and pawl assemblies 4 in the first rotation limit structure is two.

[0078] In some embodiments of this application, when the first rotation limiting structure (or the second rotation limiting structure) includes a ratchet assembly 3 and a pawl assembly 4 arranged coaxially, the ratchet assembly 3 is used to limit the brake disc body 1 to rotate in a first direction, and the pawl assembly 4 is used to limit the brake disc body 1 to rotate in a second direction. The first direction is opposite to the second direction. Specifically, one of the first direction and the second direction is clockwise rotation (i.e., forward direction), and the other is counterclockwise rotation (i.e., reverse direction).

[0079] Alternatively, when the first rotation limiting structure (or the second rotation limiting structure) includes two coaxially arranged ratchet assemblies 3, one ratchet assembly 3 is used to limit the rotation of the brake disc body 1 in a first direction, and the other ratchet assembly 3 is used to limit the rotation of the brake disc body 1 in a second direction; for example... Figure 4 As shown.

[0080] Alternatively, when the first rotation limiting structure (or the second rotation limiting structure) includes two coaxially arranged pawl assemblies 4, one pawl assembly 4 is used to limit the rotation of the brake disc body 1 in a first direction, and the other pawl assembly 4 is used to limit the rotation of the brake disc body 1 in a second direction, such as... Figure 2 As shown.

[0081] To enable braking through the engagement of the ratchet assembly 3 and the pawl assembly 4 when the brake disc body 1 contacts the end face of the armature, in some embodiments of this application, when the ratchet assembly 3 is disposed on the brake disc body 1, the ratchet assembly 3 includes a plurality of ratchet teeth 31 arranged circumferentially along the first disc structure 11, and the ratchet teeth 31 extend axially along the first disc structure 11. The ratchet teeth 31 have a limiting surface 311 that is radially parallel to the first disc structure 11, which can be used to abut against the pawl assembly 4 on the armature to limit the rotation of the brake disc body 1.

[0082] In some embodiments of this application, when the pawl assembly 4 is disposed on the brake disc body 1, please refer to... Figure 2 and Figure 6The pawl assembly 4 includes a pawl 41 and a first elastic element 42. Multiple pawls 41 are arranged circumferentially along the first disc structure 11. The pawls 41 are rotatably mounted on the first disc structure 11, and their rotation axis is parallel to the radial direction of the first disc structure 11. The first elastic element 42 connects the pawls 41 and the first disc structure 11. When the pawl 41 contacts the ratchet assembly 3 mounted on the armature, if the brake disc body 1 rotates, the ratchet teeth 31 move relative to the pawl 41 from... Figure 6 If the ratchet 31 moves from the left to the right, the rotation of the pawl 41 will not be restricted by the ratchet 31 relative to the pawl 41. Figure 6 When the right side moves to the left side, the pawl 41 will abut against the limiting surface 311 of the ratchet 31. The ratchet 31 restricts the rotation of the pawl 41, thereby restricting the further rotation of the brake disc body 1.

[0083] It should be noted that during the braking process via the ratchet assembly 3 and the pawl assembly 4, the kinetic energy of the brake disc body 1 can be converted into elastic potential energy through the elastic deformation of the first elastic element 42, which can quickly reduce the speed of the brake disc body 1.

[0084] To restrict the unidirectional rotation of the ratchet 31 via the pawl 41, in some embodiments of this application, the pawl 41 includes an L-shaped column 411 and an arc plate 412 connected together. A first elastic element 42 and the arc plate 412 are respectively connected to both sides of the column 411, wherein the arc plate 412 is used to contact or abut against the ratchet 31. When the ratchet 31 moves relative to the pawl 41 from... Figure 6 When it moves from the left to the right, pawl 41 moves along Figure 6 When the ratchet rotates clockwise, the first elastic element 42 applies a pulling force to the pawl 41 to prevent it from over-rotating and flipping. At this time, the ratchet 31 does not restrict the rotation of the pawl 41. When the ratchet 31 moves relative to the pawl 41 from... Figure 6 When it moves from the right to the left, the pawl 41 moves along... Figure 6 When the ratchet rotates counterclockwise, the first elastic element 42 applies pressure to the pawl 41, causing the front end of the arc plate 412 to abut against the limiting surface 311 of the ratchet 31, thereby restricting the rotation of the pawl 41. Specifically, both ends of the first elastic element 42 are fixedly connected to the first disc structure 11 and the pawl 41, respectively, to prevent the first elastic element 42 from shifting during use, which could cause the pawl 41 to over-rotate and fail to cooperate with the ratchet assembly 3 to achieve braking. Preferably, the first elastic element 42 is a metal spring, which can be fixedly connected to the first disc structure 11 and the pawl 41 by welding.

[0085] In the above embodiment, if two adjacent pawls 41 are close together, along the pawl 41... Figure 6When the pawl rotates clockwise, the arc plate 412 of the next pawl 41 may interfere with the post 411 of the previous pawl 41.

[0086] To address the aforementioned issues, please refer to some embodiments of this application. Figure 6 The column 411 has a clearance portion 4111 on the side away from the arc plate 412 to avoid interference with the arc plate 412 of the pawl 41 behind it. Specifically, since the first pawl assembly 4a is disposed inside the second pawl assembly 4b, the distance between two adjacent first pawls 41a is small, therefore the column 411 of the first pawl 41a is provided with a clearance portion 4111.

[0087] To facilitate the rotation of the pawl 41, please refer to some embodiments of this application. Figure 2 , Figure 3 and Figure 6 The pawl assembly 4 also includes a hinge bracket 43, on which the column 411 is rotatably mounted. Specifically, the hinge bracket 43 includes a mounting bracket 431 and a rotating pin 432. When the pawl assembly 4 is mounted on the brake disc body 1, the mounting bracket 431 is connected to the first disc structure 11, and the rotating pin 432 is mounted on the mounting bracket 431. The axis of the rotating pin 432 is parallel to the radial direction of the first disc structure 11, allowing the pawl 41 to rotate around the rotating pin 432, thereby achieving engagement with the ratchet teeth 31 on the armature.

[0088] It should be noted that, since the brake disc body 1 has considerable kinetic energy during braking, if a rigid ratchet assembly 3 is provided on the first disc structure 11, the high-speed rotating rigid ratchet 31 on the brake disc body 1 will exert a large impact on the pawl assembly 4 on the armature during braking, which could easily lead to damage to the brake disc or armature. However, the pawl assembly 4 is provided with a first elastic element 42. When the arc plate 412 of the pawl 41 contacts the ratchet 31 on the armature, the first elastic element 42 has a buffering effect, which can alleviate the impact of the high-speed rotating pawl 41 on the armature, thereby preventing damage to the brake disc or armature and extending the service life of the brake. Therefore, it is preferable to place the pawl assembly 4 on the brake disc body 1 and the ratchet assembly 3 on the armature. Figure 2 and Figure 4 As shown.

[0089] To enable braking via the brake disc and armature in both forward and reverse rotation of the motor shaft, two concentrically arranged ratchet assemblies 4 are provided on the brake disc body 1, namely the first ratchet assembly 4a and the second ratchet assembly 4b. Figure 2As shown; correspondingly, two ratchet assemblies 3 are provided on the armature, namely a first ratchet assembly 3a and a second ratchet assembly 3b. The first pawl assembly 4a cooperates with the first ratchet assembly 3a to restrict the brake disc body 1 from rotating in a first direction, and the second pawl assembly 4b cooperates with the second ratchet assembly 3b to restrict the brake disc body 1 from rotating in a second direction. Specifically, the setting direction of the first pawl 41a in the first pawl assembly 4a is opposite to the setting direction of the second pawl 41b in the second pawl assembly 4b, that is, the setting directions of the first arc plate 412a and the second arc plate 412b are opposite, as shown below. Figure 2 , Figure 7 and Figure 8 As shown; the orientation of the first ratchet tooth 31a in the first ratchet assembly 3a is opposite to the orientation of the second ratchet tooth 31b in the second ratchet assembly 3b, as shown. Figure 4 and Figure 9 As shown.

[0090] It should be noted that, since both the ratchet 31 and the pawl 41 need to withstand a large impact force during braking, the ratchet 31 and the pawl 41 are preferably made of high-strength materials. Specifically, the ratchet 31 and the pawl 41 can be made of materials such as Teflon, alloy steel and high-strength steel to improve the service life of the ratchet assembly 3 and the pawl assembly 4.

[0091] A second aspect of this application provides an armature for cooperating with the brake disc described in the above embodiments. Please refer to [link to relevant documentation]. Figure 1 , Figure 4 and Figure 9 The armature includes: an armature body 5, a third braking part 6, and a fourth braking part. The armature body 5 includes a second disc structure 51. The third braking part 6 is coaxially disposed on the second disc structure 51. The third braking part 6 is used for contact with the friction pad 21. The braking torque is applied to the brake disc body 1 through the cooperation of the third braking part 6 and the first braking part 2. The fourth braking part has a second rotation limiting structure, which is matched with the first rotation limiting structure.

[0092] It should be noted that when the ratchet assembly 3 is disposed on the second disc structure 51, the ratchet assembly 3 includes a plurality of ratchet teeth 31 arranged circumferentially along the second disc structure 51, and the ratchet teeth 31 extend axially along the second disc structure 51. The ratchet teeth 31 have a limiting surface 311 that is radially parallel to the second disc structure 51, which can be used to abut against the pawl assembly 4 on the brake disc body 1 to limit the rotation of the brake disc body 1.

[0093] Since the friction pad 21 on the brake disc body 1 is disposed in the annular groove 22 of the first brake part 2, in order to achieve direct contact between the third brake part 6 and the friction pad 21, in some embodiments of this application, the third brake part 6 and the first brake part 2 are in a concave-convex fit, such as... Figure 1 , Figure 5 and Figure 10 As shown.

[0094] To facilitate a concave-convex fit between the third braking part 6 and the first braking part 2, in some embodiments of this application, the third braking part 6 has an abutment part 61. During braking, the abutment part 61 can be inserted into the annular groove 22 and contact the friction piece 21 at the bottom of the annular groove 22. Figure 1 , Figure 5 and Figure 10 As shown. In order to increase the friction between the abutment part 61 and the friction plate 21, a braking coating is provided on the abutment part 61.

[0095] In some specific embodiments of this application, the braking coating can be made of metal, rubber-based or silicone-based materials. Commonly used metal braking coatings include copper-based coatings, nickel-based coatings, etc. The above-mentioned braking coating can increase the friction coefficient of the surface of the contact portion 61 while ensuring the flatness of the contact portion 61, thereby increasing the friction braking torque between the friction pad 21 and the contact portion 61.

[0096] It should be noted that the shape of the abutment portion 61 matches the annular groove 22. In some embodiments of this application, the cross-sectional shape of the abutment portion 61 is rectangular or trapezoidal. Specifically, when the cross-section of the first annular groove 22a and the second annular groove 22b is rectangular, the cross-section of the first abutment portion 61a inserted into the first annular groove 22a is also rectangular, and the cross-section of the second abutment portion 61b inserted into the second annular groove 22b is also rectangular. Figure 1 , Figure 2 and Figure 5 As shown; when the cross-section of the third annular groove 22c is trapezoidal, the cross-section of the third abutment part 61c, which is inserted into the third annular groove 22c, is also trapezoidal, as shown. Figure 10 As shown.

[0097] In the above embodiments, in order to increase the contact area between the friction plate 21 and the abutment portion 61, both sides of the friction plate 21 can extend and be disposed on the sidewalls of the annular groove 22, which can increase the braking area, such as... Figure 10 The third friction plate 21c is shown in the figure.

[0098] The third aspect of this application provides a brake, including the brake disc and armature described in the above embodiments, and also includes a brake mounting base 7. The brake mounting base 7 has a receiving cavity for accommodating the brake disc body 1 and the armature body 5. The brake disc body 1 and the armature body 5 are disposed opposite to each other. The armature body 5 can slide along its axial direction in the receiving cavity to achieve contact and separation with the brake disc body 1, thereby realizing the opening and closing of the braking state.

[0099] The brake mounting base 7 has an electromagnetic coil 71 and a second elastic element 72. Both the electromagnetic coil 71 and the second elastic element 72 are located on the side of the armature body 5 away from the brake disc body 1. The second elastic element 72 abuts against the armature body 5 and the brake mounting base 7. When the electromagnetic coil 71 is energized, it generates a magnetic attraction force on the armature body 5, causing the armature body 5 to... Figure 1 The movement to the right separates the first braking part 2 from the third braking part 6 and the second braking part from the fourth braking part, releasing the braking state. The brake disc body 1 can then rotate forward or backward with the motor shaft, allowing the actuator or related equipment connected to the motor to operate normally. When the electromagnetic coil 71 is de-energized, its magnetic attraction disappears, and the armature body 5, under the elastic force of the second elastic element 72, moves towards... Figure 1 The left side moves, causing the third braking part 6 to disengage from the rotating first braking part 2, and the fourth braking part to come into contact with the rotating second braking part, thereby restricting the rotation of the brake disc body 1. The brake disc body 1 then drives the motor shaft to stop rotating, and the braking state is activated.

[0100] To facilitate the placement of the brake disc body 1 and armature body 5 within the receiving cavity of the brake mounting base 7, please refer to some embodiments of this application. Figure 1 The brake mounting base 7 includes a detachably connected brake base 73 and mounting disc 74. The electromagnetic coil 71 and the second elastic element 72 are disposed in the brake base 73. The armature body 5 is slidably connected to the brake base 73. The mounting disc 74 is connected to the brake base 73 by mounting screws 75 and is used to axially limit the brake disc body 1. The brake disc body 1 can rotate relative to the mounting disc 74. Specifically, a lubricating pad 76 is provided between the contact surfaces of the mounting disc 74 and the brake disc body 1 to reduce the friction between the brake disc body 1 and the mounting disc 74 when rotating, and to prevent the mounting disc 74 from affecting the normal rotation of the brake disc body 1.

[0101] The fourth aspect of this application provides an electric motor, including the brake described in the above embodiments. The motor shaft in the motor is connected to the connecting part 12 on the brake disc body 1, and the braking of the motor can be achieved through the cooperation of the brake disc body 1 and the armature body 5.

[0102] Please see Figures 1 to 10 In some embodiments of this application, the braking method of the above-mentioned brake is as follows:

[0103] Step 1: In the initial state, the electromagnetic coil 71 is not energized, and the armature body 5 is in contact with the brake disc body 1 from the left and right sides of the second elastic element 72. Since the brake disc body 1 is provided with two pawl assemblies 4 in opposite directions and the armature body 5 is provided with two ratchet assemblies 3 in opposite directions, the forward and reverse rotation of the brake disc body 1 can be restricted.

[0104] Step 2: The motor starts, the electromagnetic coil 71 is energized, and the armature body 5 moves away from the brake disc body 1 under the magnetic attraction of the electromagnetic coil 71, causing the first brake part 2 to separate from the third brake part 6 and the second brake part to separate from the fourth brake part. The motor shaft can drive the brake disc body 1 to rotate forward or backward, so that the actuator or related equipment connected to the motor shaft can rotate normally.

[0105] Step 3: When braking is required, the electromagnetic coil 71 is de-energized, causing the magnetic attraction force generated by the electromagnetic coil 71 on the armature body 5 to disappear; the armature body 5 moves towards the brake disc body 1 under the action of the second elastic element 72, so that the abutment part 61 contacts the friction plate 21. At the same time, a pawl assembly 4 on the brake disc body 1 abuts against the ratchet assembly 3 on the armature body 5 corresponding to its position. The first braking part 2 contacts the third braking part 6, and the friction plate 21 is squeezed by the abutment part 61 to generate a friction braking torque; the second braking part contacts the fourth braking part. If the brake disc body 1 rotates in the first direction during braking, the first pawl 41a abuts against the limiting surface 311 of the first ratchet 31a, restricting the brake disc body 1 from continuing to rotate in the first direction; if the brake disc body 1 rotates in the second direction during braking, the second pawl 41b abuts against the limiting surface 311 of the second ratchet 31b, restricting the brake disc body 1 from continuing to rotate in the second direction, thereby realizing the braking of the brake and the motor shaft.

[0106] It should be noted that the brake of this application, through the cooperation of ratchet assembly 3 and pawl assembly 4, can ensure emergency braking within a very short rotation stroke of the brake disc body 1, with strong braking reliability. It can prevent the actuator connected to the motor shaft from still rotating significantly after braking, thus avoiding collisions with other equipment or personnel within the production area and preventing safety accidents.

[0107] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0108] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0109] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A brake disc, characterized in that, include: Brake disc body (1), the brake disc body (1) includes a first disc structure (11); The first braking part (2) is coaxially disposed on the first disc structure (11) and has a friction plate (21). The second braking part is coaxially disposed on the first disc structure (11). The second braking part has a first rotation limiting structure, which includes a ratchet assembly (3) and / or a pawl assembly (4). The first braking part (2) and the second braking part are used to contact the armature.

2. The brake disc according to claim 1, characterized in that, The first braking part (2) has an annular groove (22), the bottom of the annular groove (22) is provided with the friction plate (21), and the side wall of the annular groove (22) is provided with a sealing element (23).

3. The brake disc according to claim 2, characterized in that, The annular groove (22) has a guide structure (221) on its side wall.

4. The brake disc according to claim 3, characterized in that, The guide structure (221) is provided with an installation groove (222), and the seal (23) is embedded in the installation groove (222), with at least a portion of the seal (23) protruding from the installation groove (222).

5. The brake disc according to claim 1, characterized in that, When the first rotation limiting structure includes the ratchet assembly (3) and the pawl assembly (4) arranged coaxially, the ratchet assembly (3) is used to restrict the brake disc body (1) from rotating in a first direction, and the pawl assembly (4) is used to restrict the brake disc body (1) from rotating in a second direction, wherein the first direction is opposite to the second direction; Alternatively, when the first rotation limiting structure includes two coaxially arranged ratchet assemblies (3), one of the ratchet assemblies (3) is used to restrict the brake disc body (1) from rotating in the first direction, and the other ratchet assembly (3) is used to restrict the brake disc body (1) from rotating in the second direction; Alternatively, when the first rotation limiting structure includes two coaxially arranged pawl assemblies (4), one of the pawl assemblies (4) is used to restrict the brake disc body (1) from rotating in the first direction, and the other pawl assembly (4) is used to restrict the brake disc body (1) from rotating in the second direction.

6. The brake disc according to claim 1, characterized in that, The ratchet assembly (3) includes a plurality of ratchet teeth (31) arranged circumferentially along the first disk structure (11), the ratchet teeth (31) extending axially along the first disk structure (11).

7. The brake disc according to claim 1, characterized in that, The pawl assembly (4) includes a pawl (41) and a first elastic element (42). A plurality of pawls (41) are arranged circumferentially along the first disk structure (11). The pawls (41) are rotatably mounted on the first disk structure (11). The rotation axis of the pawls (41) is parallel to the radial direction of the first disk structure (11). The first elastic element (42) is connected between the pawls (41) and the first disk structure (11).

8. The brake disc according to claim 7, characterized in that, The pawl (41) includes a connected column (411) and an arc plate (412), with the first elastic element (42) and the arc plate (412) respectively connected to both sides of the column (411).

9. The brake disc according to claim 8, characterized in that, The column (411) has a clearance portion (4111) on the side away from the arc plate (412).

10. The brake disc according to claim 8, characterized in that, The pawl assembly (4) also includes a hinge bracket (43), on which the column (411) is rotatably mounted.

11. An armature for cooperating with a brake disc according to any one of claims 1 to 10, characterized in that, include: The armature body (5) includes a second disc structure (51). The third braking part (6) is coaxially disposed on the second disk structure (51) and is used for contact with the friction plate (21); The fourth braking part has a second rotation limiting structure, which is matched with the first rotation limiting structure.

12. The armature according to claim 11, characterized in that, The third braking part (6) and the first braking part (2) are in a concave-convex fit.

13. The armature according to claim 12, characterized in that, The third braking part (6) has an abutment part (61) on which a braking coating is provided.

14. The armature according to claim 13, characterized in that, The cross-sectional shape of the abutment part (61) is rectangular or trapezoidal.

15. A brake, characterized in that, include: Brake disc as described in any one of claims 1 to 10; The armature as described in any one of claims 11 to 14; A brake mounting base (7) has a cavity inside for accommodating the brake disc body (1) and the armature body (5). The brake disc body (1) and the armature body (5) are disposed opposite to each other, and the armature body (5) can slide along its axial direction in the cavity. The brake mounting base (7) has an electromagnetic coil (71) and a second elastic element (72). The electromagnetic coil (71) and the second elastic element (72) are both disposed on the side of the armature body (5) away from the brake disc body (1). The second elastic element (72) abuts against the armature body (5) and the brake mounting base (7).

16. An electric motor, characterized in that, Includes the brake as described in claim 15.

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