Electromagnetic brakes, drive systems and engineering vehicles

Abstract

This application relates to an electromagnetic brake, a drive system, and an engineering vehicle. The electromagnetic brake includes: a friction disc assembly comprising a first friction disc and a second friction disc stacked together, wherein the first friction disc separates from the second friction disc when an electromagnetic force is applied; a release disc located on the side of the first friction disc facing the second friction disc; a force-applying member applying force to the release disc in the direction from the second friction disc to the first friction disc; a pressure disc located on the side of the release disc facing the first friction disc and abutting against the release disc; and an operating member for operablely adjusting the position of the pressure disc, wherein when the pressure disc is adjusted from a first position to a second position in the direction from the release disc to the pressure disc, the release disc, under the action of the force-applying member, presses against the first friction disc, thereby separating the first friction disc from the second friction disc. In this manner, when power to the electromagnetic brake is unavailable, release can be achieved without disassembling the electromagnetic brake, saving time and effort and eliminating safety hazards.

Description

Technical Field

[0001] This application relates to the field of brake technology, specifically to an electromagnetic brake, a drive system having the electromagnetic brake, and an engineering vehicle having the electromagnetic brake or the drive system. Background Technology

[0002] A brake is a device that slows down, stops, or keeps moving parts in a machine at a stop. There are many types of brakes, among which electromagnetic brakes are widely used due to their advantages such as compact structure, simple operation, sensitive response, long service life, reliable use, and ease of remote control.

[0003] For a non-excitation type electromagnetic brake (or electromagnetic de-energized brake), when the electromagnetic component (e.g., excitation coil) of the brake is energized, the brake is in the released state, and the brake releases the moving parts in the machine (i.e., the brake does not brake the moving parts); when the electromagnetic component is de-energized, the brake is in the braking state, and the brake brakes the moving parts of the external machine.

[0004] In related technologies, when power cannot be supplied to a non-excited brake, the brake cannot switch to the release state. In this case, if it is necessary to release the moving parts in the machine, the brake needs to be removed, which is not only time-consuming and laborious, but may also cause the brake to fail after reinstallation, thus creating a safety hazard. Summary of the Invention

[0005] This application provides an electromagnetic brake. The brake includes: a friction disc assembly comprising a first friction disc and a second friction disc stacked together, wherein the first friction disc separates from the second friction disc when an electromagnetic force is applied; a release disc located on the side of the first friction disc facing the second friction disc; a force-applying member applying force to the release disc in the direction from the second friction disc to the first friction disc; a pressure disc located on the side of the release disc facing the first friction disc and abutting against the release disc; and an operating member for operablely adjusting the position of the pressure disc, wherein when the pressure disc is adjusted from a first position to a second position in the direction from the release disc to the pressure disc, the release disc, under the action of the force-applying member, presses against the first friction disc, thereby separating the first friction disc from the second friction disc.

[0006] In this way, when power cannot be supplied to the electromagnetic brake, the electromagnetic brake can be released without disassembling it, which saves time and effort and does not cause any safety hazards.

[0007] In some embodiments, the release disc is annular, the diameter of the first friction disc is greater than the inner diameter of the release disc and smaller than the outer diameter of the release disc, and the diameter of the second friction disc is smaller than the inner diameter of the release disc.

[0008] In this way, when the release disc moves between the initial position and the release position, the first friction disc can follow the release disc and avoid interference between the release disc and the second friction disc.

[0009] In some embodiments, the pressure plate includes a body portion and an extension portion extending from the body portion toward the release plate, the extension portion abutting against the release plate, and a first friction plate located on the inner peripheral side of the extension portion.

[0010] In this implementation, the pressure plate can abut against the release plate through the extension and avoid interference with the first friction plate during movement, and the operating element can act on the main body to adjust the position of the pressure plate.

[0011] In some embodiments, the operating element includes a release screw located on the side of the body opposite to the release disc and abutting against the body, wherein when the release screw is rotated, it moves in a direction from the pressure plate to the release disc or in a direction from the release disc to the pressure plate.

[0012] In some embodiments, the operating element includes a release screw located on the side of the pressure plate opposite to the release plate and abutting against the pressure plate, wherein when the release screw is rotated, it moves in a direction from the pressure plate to the release plate or in a direction from the release plate to the pressure plate.

[0013] Using this method, the operator only needs to turn the release screw to manually release the electromagnetic brake or restore it to normal operating condition. Therefore, this method is quite convenient to operate.

[0014] In some embodiments, the electromagnetic brake further includes a housing with a threaded hole, and a release screw engages with the threaded hole.

[0015] When the operator turns the release screw, the release screw can move in the stacking direction of the release plate and the pressure plate due to the action of the internal thread of the threaded hole and the external thread of the release screw, thereby adjusting the position of the pressure plate.

[0016] In some embodiments, the electromagnetic brake further includes a locking nut that engages with the release screw, the locking nut being used to lock the release screw.

[0017] During normal use, the locking nut can be pre-tightened to prevent the release nut from moving due to environmental factors such as vibration.

[0018] In some embodiments, the electromagnetic brake further includes a rotating component, and the housing is provided with a through hole exposing the rotating component. The threaded hole and the through hole are respectively provided on opposite side walls of the housing.

[0019] In practical applications, the exposed rotating part of an electromagnetic brake typically faces external machinery. This results in a relatively small space on the side of the electromagnetic brake with the through hole, making operation inconvenient if the release screw is located on this side. Therefore, the above-described implementation allows the release screw to be located on the side of the electromagnetic brake away from external machinery, facilitating operation.

[0020] In some embodiments, the force-applying element includes a first elastic element located on the side of the release disc opposite to the first friction disc and pressing the release disc, and the electromagnetic brake further includes a second elastic element located on the side of the first friction disc opposite to the release disc and pressing the first friction disc, wherein the electromagnetic brake includes at least one first elastic element and at least one second elastic element, and the sum of the pre-pressures of the at least one first elastic element is greater than the sum of the pre-pressures of the at least one second elastic element.

[0021] Therefore, when the pressure plate is adjusted from the first position to the second position, under the action of at least one first elastic element, the first friction plate can overcome the force exerted on it by at least one second elastic element, compress the at least one second elastic element, and separate the first friction plate and the second friction plate.

[0022] In some embodiments, the electromagnetic brake further includes an electromagnetic element that applies an electromagnetic force to the first friction disc when energized, thereby separating the first friction disc from the second friction disc.

[0023] In some embodiments, the electromagnetic brake further includes a rotating component, wherein a first friction disc does not rotate with the rotating component, and a second friction disc rotates with the rotating component.

[0024] In some embodiments, the electromagnetic brake further includes a housing and a third friction disc, the third friction disc being located on the side of the second friction disc opposite to the first friction disc, and the third friction disc not rotating with the rotating component.

[0025] The second friction disc will not directly contact the inner wall of the housing due to the third friction disc, thus preventing the second friction disc from causing wear to the inner wall of the housing.

[0026] This application also provides a drive system. The drive system includes: a drive device; and an electromagnetic brake as described in the above embodiments, coupled to the drive device.

[0027] This application also provides an engineering vehicle. The engineering vehicle includes the electromagnetic brake described in the above embodiments, or includes the drive system described in the above embodiments. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly described below.

[0029] It should be understood that the following figures only illustrate certain embodiments of this application and should not be construed as limiting the scope.

[0030] It should be understood that the same or similar reference numerals are used in the accompanying drawings to denote the same or similar elements (components or components).

[0031] It should be understood that the accompanying drawings are only schematic, and the dimensions and scale of the elements (components or parts) in the drawings are not necessarily precise.

[0032] Figure 1 This is a schematic diagram of the structure of an electromagnetic brake according to an embodiment of this application.

[0033] Figure 2 yes Figure 1 Another view of the electromagnetic brake in the diagram.

[0034] Figure 3 yes Figure 1 An exploded view of the electromagnetic brake in the diagram.

[0035] Figure 4 It is along Figure 1 The cross-sectional view taken along line AA, with the pressure plate in the first position.

[0036] Figure 5 It is along Figure 1 The cross-sectional view taken along line AA, with the pressure plate in the second position.

[0037] Figure 6 yes Figure 1 A schematic diagram of the release disc of the electromagnetic brake in the diagram.

[0038] Figure 7 yes Figure 1 A schematic diagram of the structure of the first friction disc of the electromagnetic brake in the diagram.

[0039] Figure 8 yes Figure 1 A schematic diagram of the structure of the second friction disc of the electromagnetic brake.

[0040] Figure 9 yes Figure 1 A schematic diagram of the pressure plate of the electromagnetic brake in the diagram.

[0041] Figure 10 yes Figure 1 A schematic diagram of the structure of the third friction disc of the electromagnetic brake.

[0042] Figure 11 This is a schematic cross-sectional view of a portion of a component of an electromagnetic brake according to another embodiment of this application, wherein the pressure plate is located in a first position.

[0043] Figure 12 yes Figure 11 A schematic cross-sectional view of the components, with the pressure plate in the second position. Detailed Implementation

[0044] The embodiments of this application are illustrated below with reference to the accompanying drawings. It should be understood that there are various ways to implement this application, and it should not be construed as being limited to the embodiments described herein. The embodiments described herein are only for a more thorough and complete understanding of this application.

[0045] See Figures 1 to 5 This application provides an electromagnetic brake 10. The electromagnetic brake 10 includes a friction disc assembly 11, a release disc 121, a pressure disc 122, a force-applying element 131, and an operating element 141. The friction disc assembly 11 includes a first friction disc 111 and a second friction disc 112 arranged in a stacked manner. The first friction disc 111 is movable in the stacking direction of the first friction disc 111 and the second friction disc 112, thereby realizing engagement (being pressed together) and separation with the second friction disc 112.

[0046] It should be understood that, in the embodiments of this application, the stacking direction of the first friction disk 111 and the second friction disk 112 includes the direction from the first friction disk 111 to the second friction disk 112, and also includes the direction from the second friction disk 112 to the first friction disk 111.

[0047] In the electromagnetic brake 10, the first friction disc 111 acts as an armature, separating from the second friction disc 112 when an electromagnetic force is applied. Specifically, when energized, the first friction disc 111 separates from the second friction disc 112 under the action of electromagnetic force, and the electromagnetic brake 10 switches to the released state; when de-energized, the electromagnetic force acting on the first friction disc 111 disappears, the first friction disc 111 resets to engage with the second friction disc 112, and the electromagnetic brake 10 returns to the braking state. That is to say, the electromagnetic brake 10 can be a non-excited electromagnetic brake.

[0048] The release plate 121 is located on the side of the first friction plate 111 facing the second friction plate 112. The pressure plate 122 is located on the side of the release plate 121 facing the first friction plate 111, and the pressure plate 122 abuts against the release plate 121. Both the release plate 121 and the pressure plate 122 can move in the stacking direction of the two (release plate 121 and pressure plate 122).

[0049] It should be understood that the stacking direction of the release plate 121 and the pressure plate 122 includes the direction from the release plate 121 to the pressure plate 122 (i.e., the direction from the second friction plate 112 to the first friction plate 111), and also includes the direction from the pressure plate 122 to the release plate 121 (i.e., the direction from the first friction plate 111 to the second friction plate 112).

[0050] The force-applying component 131 applies a force to the release plate 121 in the direction from the release plate 121 to the pressure plate 122, i.e., from the second friction plate 112 to the first friction plate 111. The operating component 141 is used to operably adjust the position of the pressure plate 122. Specifically, the operator can move the pressure plate 122 from a first position to a second position in the direction from the release plate 121 to the pressure plate 122 by operating the operating component 141, and can also move the pressure plate 122 from the second position to the first position in the direction from the pressure plate 122 to the release plate 121.

[0051] When the pressure plate 122 is in the first position, as Figure 4 As shown, the pressure plate 122 presses down on the release plate 121, causing the release plate 121 to overcome the force applied by the force-applying member 131 and hold the release plate 121 in place. Figure 4 The initial position is in the middle. At this time, the release disc 121 does not affect the engagement and disengagement of the first friction disc 111 and the second friction disc 112. The first friction disc 111 is separated from the second friction disc 112 when electromagnetic force is applied, and is engaged with the second friction disc 112 when the electromagnetic force is removed. The electromagnetic brake 10 can be used normally.

[0052] As an example, when the release disc 121 is in the initial position, the release disc 121 is not in contact with the first friction disc 111, or the release disc 121 is in contact with the first friction disc 111 but does not cause the first friction disc 111 and the second friction disc 112 to separate.

[0053] When the pressure plate 122 is in the second position, as Figure 5 As shown, under the action of the force-applying component 131, the release disc 121 is located... Figure 5 The release position is reached. At this time, under the action of the force-applying component 131, the release disc 121 presses against the first release disc 111, causing the first friction disc 111 to separate from the second friction disc 112, and the electromagnetic brake 10 is in the released state.

[0054] During normal use, the pressure plate 122 can be held in the first position. When power cannot be supplied to the electromagnetic brake 10, the operator can use the operating component 141 to adjust the pressure plate 122 from the first position to the second position in the direction from the release plate 121 to the pressure plate 122. As a result, the release plate 121 is forced to press the first friction plate 111 under the action of the force application component 131, so that the first friction plate 111 is separated from the second friction plate 112, and the electromagnetic brake 10 is switched from the braking state to the release state, realizing the manual release of the electromagnetic brake 10.

[0055] In this way, when power cannot be supplied to the electromagnetic brake 10, the electromagnetic brake 10 can be released without disassembling it, which saves time and effort and does not cause any safety hazards.

[0056] Figures 6 to 8 Release disc 121, first friction disc 111, and second friction disc 112 are shown separately. Figure 6 In the diagram, (B) is a sectional view taken along line BB in (A). Figure 7 In the diagram, (B) is a sectional view taken along line CC in (A). Figure 8 In the diagram, (B) is a cross-sectional view taken along line DD in (A).

[0057] See Figures 6 to 8 The release disc 121 is annular. The diameter Φ1 of the first friction disc 111 is larger than the inner diameter d1 of the release disc 121 and smaller than the outer diameter D1 of the release disc. The diameter Φ2 of the second friction disc 112 is smaller than the inner diameter d1 of the release disc 121. In this way, when the release disc 121 moves between the initial position and the release position, the first friction disc 111 can move with the release disc 121, and interference between the release disc 121 and the second friction disc 112 can be avoided.

[0058] Figure 9 Pressure plate 122 is shown separately. Figure 9 In the diagram, (B) is a cross-sectional view taken along line EE in (A).

[0059] See Figure 4 , Figure 5 and Figure 9 The pressure plate 122 includes a body portion 1221 and an extension portion 1222. The extension portion 1222 extends from the body portion 1221 toward and abuts against the release plate 121. The first friction plate 111 is located on the inner circumferential side of the extension portion 1222. In this implementation, the pressure plate 122 can abut against the release plate 121 through the extension portion 1222 and avoids interference with the first friction plate 111 during movement. The operating member 141 can act on the body portion 1221 to adjust the position of the pressure plate 122.

[0060] As a concrete example, see Figure 6 , Figure 7 and Figure 9 The extension 1222 is annular. The inner diameter d2 of the extension 1222 is smaller than the outer diameter D1 of the release disk 121 and larger than the diameter Φ1 of the first friction disk. Thus, the extension 1222 can abut against the release disk 121, and the first friction disk 111 can be located on the inner circumference of the extension 1222.

[0061] See you again Figures 3 to 5The operating element 141 includes a release screw 141. The release screw 141 is located on the side of the pressure plate 122 opposite to the release plate 121, and abuts against the pressure plate 122. For example, the release screw 141 may be located on the side of the body portion 1221 opposite to the release plate 121 and abut against the body portion 1221. When the operator rotates the release screw 141, the release screw 141 can move in the stacking direction of the release plate 121 and the pressure plate 122, that is, move in the direction from the pressure plate 122 to the release plate 121, or move in the direction from the release plate 121 to the pressure plate 122. The direction of movement of the release screw 141 depends on the direction of rotation by the operator.

[0062] When the electromagnetic brake 10 needs to be manually released, the operator can rotate the release screw 141, causing it to move from the release disc 121 to the pressure disc 122. As the release screw 141 moves, under the action of the force-applying component 131, both the release disc 121 and the pressure disc 122 move in the direction from the release disc 121 to the pressure disc 122. Figure 4 Move the position in the middle to Figure 5 In the middle position, the pressure plate 122 moves from the first position to the second position, the release plate 121 moves from the initial position to the release position, the first friction plate 111 separates from the second friction plate 112, and the electromagnetic brake 10 is released.

[0063] When it is necessary to restore the electromagnetic brake 10 to normal operating condition, the operator can rotate the release screw 141 in the opposite direction, causing the release screw 141 to move from the pressure plate 122 to the release plate 121. As the release screw 141 moves, the force exerted by the force-applying member 131 on the release plate 121 is overcome, and both the release plate 121 and the pressure plate 122 move in the direction from the pressure plate 122 to the release plate 121. Figure 5 Move the position in the middle to Figure 4 In the middle position, the pressure plate 122 moves from the second position to the first position, the release plate 121 moves from the release position to the initial position, the first friction plate 111 and the second friction plate 112 engage, and the electromagnetic brake 10 returns to normal use.

[0064] With this implementation method, the operator only needs to turn the release screw 141 to manually release the electromagnetic brake 10 or restore it to normal use. Therefore, this implementation method is quite convenient to operate.

[0065] See you again Figures 3 to 5The electromagnetic brake 10 also includes a housing 15, in which components of the electromagnetic brake, such as the friction disc assembly 11, release disc 121, pressure disc 122, and force-applying element 131, are housed. In some embodiments, the housing 15 includes a first housing portion (or end cap) 151 and a second housing portion 152. For example, the first housing portion 151 and the second housing portion 152 can be assembled together by fasteners to form a generally closed cavity.

[0066] In one specific implementation, the housing 15 is provided with a threaded hole 1511 penetrating the housing 15, and the release screw 141 is threadedly engaged with the threaded hole 1511. The threaded hole 1511 may be provided on the portion of the housing 15 located on the side of the pressure plate 122 opposite to the release plate 121. For example, in some embodiments, the threaded hole 1511 may be provided on the portion of the first housing 151 facing the pressure plate 122. When the operator rotates the release screw 141, the release screw 141 can move in the stacking direction of the release plate 121 and the pressure plate 122 due to the action of the internal thread of the threaded hole 1511 and the external thread of the release screw 141, thereby adjusting the position of the pressure plate 122.

[0067] It should be understood that in other embodiments, the housing 151 may not have the threaded hole 1511. For example, in some embodiments, the housing 151 may have a through hole, and the electromagnetic brake 10 may have a member fixed relative to the housing 15, which may have a threaded hole that engages with the release screw 141, thereby enabling it to move in the stacking direction of the release plate 121 and the pressure plate 122 by rotating the release screw 141.

[0068] See you again Figures 3 to 5 The electromagnetic brake 10 may also include a locking nut 142 for locking the release screw 141. For example, the locking nut 142 may be located on the outside of the housing 15 and threaded into the release screw 141. During normal use, the locking nut 142 may be pre-tightened to prevent the release nut 15 from moving due to environmental factors such as vibration. When the electromagnetic brake 10 needs to be manually released, the operator can first loosen the locking nut 142 and then turn the release screw 141 to manually release the electromagnetic brake 10.

[0069] It should be understood that there are multiple ways to lock the release screw 141. In other embodiments, other methods (e.g., locking washers) may also be used to lock the release screw 141.

[0070] See you again Figures 3 to 5The electromagnetic brake 10 also includes a rotating element 16. For example, the rotating element 16 can be a rotating shaft. When the electromagnetic brake 10 is applied to external machinery, the rotating element 16 is used to connect (power coupling) with the moving parts of the external machinery. For example, if the external machinery is an electric motor, the rotating element 16 can be used to connect to the output shaft of the motor to brake the motor.

[0071] It should be understood that in other embodiments, the rotating member 16 may not be a rotating shaft. For example, in some embodiments, the rotating member 16 may also be a sleeve, into which a moving part of an external machine can extend and connect (e.g., by key connection).

[0072] The housing 15 (e.g., the second housing 152) is also provided with a through hole 1521 that exposes the rotating member 16. Specifically, the rotating member 16 can extend outside the housing 15 through the through hole 1521 to connect with a moving part of an external machine, or the moving part of an external machine can extend into the housing 15 through the through hole 1521 to connect with the rotating member 16.

[0073] The threaded hole 1511 and the through hole 1521 can be located on opposite side walls 15a and 15b of the housing 15, respectively. Considering that in practical applications, the side of the electromagnetic brake 10 with the exposed rotating part 16 usually faces external machinery, this results in a relatively small space on the side of the electromagnetic brake 10 with the through hole 1521. If the release screw 141 is located on this side, it will cause inconvenience in operation. Therefore, the above implementation allows the release screw 141 to be located on the side of the electromagnetic brake 10 away from external machinery, facilitating operation.

[0074] As one implementation method, see again Figures 3 to 5 The force-applying element 131 may include a first elastic element 131. The first elastic element 131 is located on the side of the release disc 121 opposite to the first friction disc 111 and presses the release disc 121, thereby applying force to the release disc 121 in the direction from the second friction disc 112 to the first friction disc 111.

[0075] The electromagnetic brake 10 may include at least one first elastic element 131. In one example, the electromagnetic brake 10 includes a plurality of first elastic elements 131 arranged in a ring to ensure uniform force on the release disc 121. In one example, the inner side of the housing 15 (e.g., the second housing portion 152) is provided with at least one first mounting groove 1522. At least one first elastic element 131 is respectively disposed in at least one first mounting groove 1522 to support and position at least one first elastic element 131.

[0076] The electromagnetic brake 10 also includes a second elastic element 132. The second elastic element 132 is located on the side of the first friction disc 111 opposite to the release disc 121 and presses against the first friction disc 111, thereby applying force to the first friction disc 111 in the direction from the first friction disc 111 to the second friction disc 112. During normal use, when the electromagnetic force applied to the first friction disc 111 is removed, the first friction disc 111 and the second friction disc 112 engage under the action of the second elastic element 132, thus keeping the electromagnetic brake 10 in a braking state when de-energized.

[0077] The electromagnetic brake 10 may include at least one second elastic element 132. In one example, the electromagnetic brake 10 includes a plurality of second elastic elements 132 arranged in a ring to ensure that the first friction disc 111 is subjected to uniform force.

[0078] The sum of the preloads of at least one first elastic element 131 can be configured to be greater than the sum of the preloads of at least one second elastic element 132. Thus, when the pressure plate 122 is adjusted from the first position to the second position, under the action of at least one first elastic element 131, the first friction plate 111 can overcome the force exerted on it by at least one second elastic element 132, compressing at least one second elastic element 132, thereby separating the first friction plate 111 and the second friction plate 112.

[0079] It should be understood that there are various ways to implement the first elastic element / second elastic element. For example, the first elastic element / second elastic element can be, but is not limited to, a helical spring, a leaf spring, a shaped spring, a spiral spring, a disc spring, a gas spring, a thermoplastic elastomer, or a rubber elastic element, etc.

[0080] It should be understood that there are various ways to implement the force-applying element in the embodiments of this application. For example, in some embodiments, the force-applying element may also be a tension spring disposed on the side of the release disc facing the first friction disc. For example, in some embodiments, the force-applying element may also be a pair of magnetic elements located on the side of the release disc away from the first friction disc, with one magnetic element positioned on the release disc and the other magnetic element positioned on the inner wall of the second housing, and the like poles of the two magnetic poles facing each other.

[0081] See you again Figures 3 to 5 The electromagnetic brake 10 also includes an electromagnetic element 17. In some embodiments, the electromagnetic element 17 may include an excitation coil and a yoke. The electromagnetic element 17 is configured to apply an electromagnetic force to the first friction disc 111 when energized, so that the first friction disc 111 overcomes the force exerted on it by the second elastic element 132, compresses the second elastic element 132, and separates it from the second friction disc 112.

[0082] In one example, the electromagnetic element 17 may be located on the side of the first friction disk 111 facing away from the second friction disk 112, and the second elastic element 132 may be located between the first friction disk 111 and the electromagnetic element 17. In one example, the side of the electromagnetic element 17 facing the first friction disk 111 is provided with at least one second mounting groove 171. At least one second elastic element 132 is respectively mounted in at least one second mounting groove 171 to support and position the at least one second elastic element 132. In one example, the electromagnetic element 17 is located on the inner circumferential side of the extension 1222 of the pressure disk 122, and the body portion 1221 of the pressure disk 122 is located on the side of the electromagnetic element 17 facing away from the first friction disk 111, thereby preventing interference between the pressure disk 122 and the electromagnetic element 17 when the pressure disk 122 moves.

[0083] The first friction disk 111 can be a stationary friction disk. That is, the first friction disk 111 does not rotate with the rotating member 16. Or, the first friction disk 111 cannot rotate along the rotation axis of the rotating member 16. The second friction disk 112 can be a moving friction disk. That is, the second friction disk 112 rotates with the rotating member 16. Or, the second friction disk 112 can rotate along the rotation axis of the rotating member 16. In one example, the second friction disk 112 can be connected to the rotating member 16 via a spline.

[0084] When the first friction disc 111 and the second friction disc 112 are engaged, the friction between them prevents the second friction disc 112 from rotating, thereby preventing the rotating component 16 from rotating, and the electromagnetic brake 10 is in a braking state. When the first friction disc 111 and the second friction disc 112 are separated, the second friction disc 112 is released and can rotate, thereby allowing the rotating component 16 to rotate, and the electromagnetic brake is in a released state.

[0085] In a non-limiting example, the friction disk assembly 11 may further include a third friction disk 113. The third friction disk 113 may be located on the side of the second friction disk 112 opposite to the first friction disk 111 and positioned on the inner wall of the housing 15 (the second portion of the housing 152). The third friction disk 113 may be a stationary friction disk. That is, the third friction disk 113 does not rotate with the rotating member 16. In other words, the third friction disk 113 is non-rotatable along the axis of rotation of the rotating member 16. Through the third friction disk 113, the second friction disk 112 will not directly contact the inner wall of the housing 15, thereby preventing the second friction disk 112 from causing wear on the inner wall of the housing 15.

[0086] It should be understood that in other embodiments of this application, the friction disk assembly may include more friction disks. For example, in some embodiments, the friction disk assembly may include multiple static friction disks and multiple dynamic friction disks, which are alternately stacked. In embodiments where the friction disk assembly includes multiple static friction disks, the first friction disk may be the friction disk closest to the electromagnetic component.

[0087] It should be understood that the friction between adjacent friction discs can be either dry friction or wet friction.

[0088] As one implementation method, see again Figures 3 to 5 The electromagnetic brake 10 also includes a guide 18, which is fixed relative to the housing 15.

[0089] exist Figure 10 In the diagram, (B) is a sectional view taken along line FF in (A). For example... Figure 6 , Figure 7 and Figure 10 As shown, the release disc 121 has a first guide notch 1211, the first friction disc 111 has a second guide notch 1111, and the third friction disc 113 has a third guide notch 1131. The guide member 18 passes through the first guide notch 1211, the second guide notch 1111, and the third guide notch 1131 to guide the release disc 121, the first friction disc 111, and the third friction disc 113, and to prevent the first friction disc 111 and the third friction disc 113 from rotating with the rotating member 16.

[0090] The guide member 18 can be located between the electromagnetic member 17 and the inner wall of the housing 15 (second housing 152), thereby forming a space between the electromagnetic member 17 and the inner wall of the housing 15 for the first friction disc 111 to move. In one example, the electromagnetic brake 10 also includes a fastener 19, the electromagnetic member 17 is provided with a through hole 172, the guide member 18 is provided with a through hole 181, the fastener 19 passes through the through hole 172 and the through hole 181 in sequence, and is fastened to the inner wall of the housing 15, thereby fixing the electromagnetic member 17 and the guide member 18 to the housing 15.

[0091] It should be understood that in other embodiments, the guide 18 may be fixed to the housing 15 in other ways. For example, in some embodiments, the guide 18 may be integrally formed with the inner wall of the housing 15.

[0092] It should be noted that, in the embodiments of this application, the operating element of the electromagnetic brake can be implemented in various ways, and is not limited to the implementation methods in the above embodiments. The following will combine... Figure 11 and Figure 12 An alternative implementation of the operator is provided as an example.

[0093] In some embodiments, see Figure 11and Figure 12 The operating member 241 includes a gripping part 2411 and a cam part 2412. The first housing part 251 is provided with a through hole 2511. The cam part 2412 is hinged to the first housing part 251 at the through hole 2511. The operator can rotate the operating member 241 by gripping the gripping part 2411 to change the orientation of the convex surface of the cam part 2412.

[0094] During normal use, such as Figure 11 As shown, the convex surface of the cam portion 2412 can be oriented towards the pressure plate 222, so that the convex surface of the cam portion 2412 abuts against the pressure plate 222, holding the pressure plate 222 in the first position. When it is necessary to manually release the electromagnetic brake, the operator can rotate the operating member 241 to move the operating member 241 from... Figure 11 The posture was adjusted to Figure 12 The posture of the cam 2412 causes the convex surface of the cam portion 2412 to move away from the pressure plate 222, thereby adjusting the pressure plate 222 to the second position.

[0095] This application also provides a drive system. The drive system provided in this application embodiment may include a drive device and an electromagnetic brake provided in this application embodiment.

[0096] It should be understood that, in the embodiments of this application, the drive device can refer to a device for outputting mechanical energy (e.g., torque and speed). For example, the drive device can be, but is not limited to, an electric motor, a hydraulic motor, an internal combustion engine, or an external combustion engine.

[0097] This application also provides an engineering vehicle. The engineering vehicle provided in this application may include the electromagnetic brake provided in this application, or the drive system provided in this application.

[0098] For example, in the embodiments of this application, the engineering vehicle may be, but is not limited to, an aerial work platform, a heavy transport vehicle, an excavator, a bulldozer, a road roller, a loader, or a crane, etc.

[0099] It should be understood that the term "comprising" and its variations as used in this application are open-ended, meaning "including but not limited to". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment".

[0100] It should be understood that although terms such as "first" or "second" may be used in this application to describe various elements (such as the first friction disk and the second friction disk), these elements are not limited by these terms, which are only used to distinguish one element from another.

[0101] It should be noted that the various specific technical features (elements) described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this application will not describe the various possible combinations separately.

[0102] It should be understood that in the embodiments of this application, "at least one" means one or more, and "more than one" means two or more.

[0103] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An electromagnetic brake, characterized in that, include: A friction disk assembly includes a first friction disk and a second friction disk stacked together, wherein the first friction disk separates from the second friction disk when an electromagnetic force is applied. The release disc is located on the side of the first friction disc facing the second friction disc; The force-applying component applies force to the release disc in the direction from the second friction disc to the first friction disc; The pressure plate is located on the side of the release plate facing the first friction plate and abuts against the release plate; An operating element is used to operably adjust the position of the pressure plate, wherein When the pressure plate is adjusted from the first position to the second position in the direction from the release plate to the pressure plate, the release plate is forced to press the first friction plate under the action of the force-applying member, so as to separate the first friction plate from the second friction plate.

2. The electromagnetic brake according to claim 1, characterized in that, The release disc is annular, the diameter of the first friction disc is larger than the inner diameter of the release disc and smaller than the outer diameter of the release disc, and the diameter of the second friction disc is smaller than the inner diameter of the release disc.

3. The electromagnetic brake according to claim 1, characterized in that, The pressure plate includes a body portion and an extension portion extending from the body portion toward the release plate, the extension portion abutting against the release plate, and the first friction plate being located on the inner circumferential side of the extension portion.

4. The electromagnetic brake according to claim 3, characterized in that, The operating element includes a release screw located on the side of the body portion opposite to the release disc and abutting against the body portion, wherein when the release screw is rotated, it moves in a direction from the pressure plate to the release disc or in a direction from the release disc to the pressure plate.

5. The electromagnetic brake according to claim 1, characterized in that, The operating element includes a release screw located on the side of the pressure plate opposite to the release plate and abutting against the pressure plate, wherein when the release screw is rotated, it moves in a direction from the pressure plate to the release plate or in a direction from the release plate to the pressure plate.

6. The electromagnetic brake according to claim 5, characterized in that, It also includes a housing, which has a threaded hole, and the release screw is threaded into the threaded hole.

7. The electromagnetic brake according to claim 6, characterized in that, It also includes a locking nut that engages with the threaded release screw, the locking nut being used to lock the release screw.

8. The electromagnetic brake according to claim 6, characterized in that, It also includes a rotating component, and the housing is further provided with a through hole exposing the rotating component. The threaded hole and the through hole are respectively provided on opposite side walls of the housing.

9. The electromagnetic brake according to claim 1, characterized in that, The force-applying component includes a first elastic element located on the side of the release disc opposite to the first friction disc and pressing the release disc. The electromagnetic brake also includes a second elastic element located on the side of the first friction disc opposite to the release disc and pressing the first friction disc. The electromagnetic brake includes at least one first elastic element and at least one second elastic element, and the sum of the pre-pressures of at least one first elastic element is greater than the sum of the pre-pressures of at least one second elastic element.

10. The electromagnetic brake according to claim 1, characterized in that, It also includes an electromagnetic component, which applies an electromagnetic force to the first friction disk when energized, so as to separate the first friction disk from the second friction disk.

11. The electromagnetic brake according to claim 1, characterized in that, It also includes a rotating component, wherein the first friction disk does not rotate with the rotating component, and the second friction disk rotates with the rotating component.

12. The electromagnetic brake according to claim 11, characterized in that, It also includes a housing and a third friction disk, which is located on the side of the second friction disk away from the first friction disk, and the third friction disk does not rotate with the rotating component.

13. A drive system, characterized in that, include: Drive unit; as well as An electromagnetic brake as described in any one of claims 1 to 12, coupled to the drive device.

14. An engineering vehicle, characterized in that, It includes the electromagnetic brake as described in any one of claims 1 to 12, or the drive system as described in claim 13.

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