An electromechanical brake with power-on braking

Abstract

An embodiment of the present invention discloses an electrified braking electromagnetic brake. A housing and an end cover form an installation cavity. In the cavity, a stationary plate sleeve is fixed inside the housing. A central shaft is installed between the housing and the end cover through a first bearing and a second bearing. A stationary friction plate and a moving friction plate that are overlapped, as well as a pressure plate, a half ring, and a sleeve are sequentially sleeved on the central shaft. A second spring sleeved outside the pressure plate and a first spring are separated by an annular isolation cylinder of the sleeve. A stationary armature and a moving armature are sequentially sleeved on the outer cylinder section of the sleeve, and the outer end of the sleeve is limited by the moving armature. A coil is nested and installed between the stationary armature and the moving armature. An electrical connector is fixedly installed in another cavity of the housing, and its cable is electrically connected to the coil. The technical solution provided by the embodiment of the present invention solves the problem that the existing electromagnetic brake, due to the control mode of using power-off to control the suction force of the electromagnet, is difficult to meet the reliability requirements of the system.

Description

Technical Field

[0001] The present invention relates to, but is not limited to, the technical field of fault protection, and particularly refers to an energized braking electromagnetic brake. Background Art

[0002] As an important component in the execution system, the electromagnetic brake is widely used in the flight control system. The existing electromagnetic brakes usually use a control mode of controlling the suction force of the electromagnet when power is off to realize the mechanism function, that is, when powered on, the electromagnet attracts and the braking is released, and when powered off, the electromagnet separates and the braking is applied; the above braking control mode is applied to the flight control system, for example.

[0003] However, for systems with high requirements for the reliability of braking release, the above existing electromagnetic brakes have the following problems: Since their braking is implemented when the electromagnetic brake fails (i.e., when powered off), it is difficult to meet the system's requirements for reliability, that is, this type of power-off braking electromagnetic brake cannot be applied to systems with high requirements for the reliability of braking release. Summary of the Invention

[0004] The object of the present invention is: The present invention provides an energized braking electromagnetic brake to solve the problem that the existing electromagnetic brake, due to using a control mode of controlling the suction force of the electromagnet when power is off, cannot be applied to systems with high requirements for the reliability of braking release.

[0005] The technical solution of the present invention is as follows:

[0006] An embodiment of the present invention provides an energized braking electromagnetic brake, including: a housing 101, an end cover 102, an electrical connector 103, screws 104, a positioning pin 201, a stationary plate sleeve 202, stationary friction plates 203, moving friction plates 204, a pressure plate 205, a half ring 206, a sleeve 207, a first spring 208, a second spring 209, a stationary armature 210, a moving armature 211, a central shaft 212, a first bearing 213, a second bearing 214, and a coil 217;

[0007] Wherein, the housing 101 and the end cover 102 installed at its open end form an installation cavity, and the end cover 102 is fixed to the housing 101 by a plurality of circumferentially arranged screws 104; in the installation cavity, the stationary plate sleeve 202 is fixed to the inner end face of the housing 101 through the positioning pin 201, the inner end of the central shaft 212 is installed on the inner end face of the housing 101 through the second bearing 214, the outer end is installed on the inner end face of the end cover 102 through the first bearing 213, and the stationary friction plates 203 and moving friction plates 204, as well as the pressure plate 205, the half ring 206, and the sleeve 207, are sequentially sleeved on the central shaft 212 in an overlapping manner;

[0008] The second spring 209 is sleeved outside the pressure plate 205, and the first spring 208 is sleeved outside the second spring 209. The first spring 208 and the second spring 209 are separated by the annular isolation cylinder of the sleeve 207.

[0009] The static armature 210 and the moving armature 211 are successively sleeved on the outer cylinder section of the sleeve 207, and the outer end of the sleeve 207 is limited by the moving armature 211. The coil 217 is nested and installed between the static armature 210 and the moving armature 211. The electrical connector 103 is fixedly installed in the installation cavity extending from the cylindrical part of the housing 101, and its cable passes through the through hole on the housing 101 and is electrically connected to the coil 217.

[0010] Optionally, in the energized braking electromagnetic brake as described above,

[0011] The static friction plate 203 and the static plate sleeve 202 sleeved outside it are fixedly connected by splines, and the moving friction plate 204 and the central shaft 212 are fixedly connected by splines.

[0012] Optionally, in the energized braking electromagnetic brake as described above,

[0013] Both ends of the central shaft 212 are supported by the inner rings of the first bearing 214 and the second bearing 213 respectively. The outer ring of the second bearing 214 is supported by the inner hole provided on the bottom end face of the housing 101, and the outer ring of the first bearing 213 is supported by the inner hole provided on the inner side end face of the end cover 102.

[0014] Optionally, in the energized braking electromagnetic brake as described above,

[0015] The pressure plate 205 is connected to the inner end of the sleeve 207 through a half ring 206. Among them, the inner disc body of the pressure plate 205 is close to the outermost static friction plate 203, and the outer pressure cylinder is sleeved on the inner cylinder section of the sleeve 207. The outer side end face of the sleeve 207 abuts against the inner ring boss of the outer side end face of the moving armature 211 to limit the outer end of the sleeve 207 through the moving armature 211.

[0016] Optionally, in the energized braking electromagnetic brake as described above, it further includes: a first washer 215 and a second washer 216;

[0017] Among them, the first washer 215 is pressed on the outer end face of the static plate sleeve 202, and the second spring 209 is pressed on the bottom end face of the annular isolation cylinder in the sleeve 207; the inner side of the first spring 208 is supported by the first washer 215, and the outer side end face of the first spring 208 is supported by the convex ring on the annular isolation cylinder of the sleeve 207; the inner end face of the second spring 209 is supported by the disc end face of the pressure plate 205, and the outer side end face of the second spring 209 is supported by the second washer 216; the outer circular surface of the static armature 210 is supported by the inner hole of the housing 101.

[0018] Optionally, in the energized braking electromagnetic brake as described above,

[0019] The energized braking electromagnetic brake is used to push the sleeve 207 outward by the first spring 208, and drive the pressure plate 205 and the moving armature 211 to move outward simultaneously through the half ring 206, so as to realize the braking release function of the electromagnetic brake.

[0020] Optionally, in the energized braking electromagnetic brake as described above,

[0021] The energized braking electromagnetic brake is also used to energize the coil 217 through the electrical connector 103, so that the electromagnetic attraction force generated by the static armature 210 makes the moving armature 211 move inward, and drives the half ring 206 and the pressure plate 205 to move inward simultaneously after overcoming the installation forces of the first spring 208 and the second spring 209 through the sleeve 207, so as to apply the attraction force to the static friction plate 203 and the moving friction plate 204 to generate a braking torque, realizing the braking function of the electromagnetic brake.

[0022] Optionally, in the energized braking electromagnetic brake as described above,

[0023] The first spring 208 and the second spring 209 are spiral springs or disc springs;

[0024] The half ring 206 is set as a semi-circular ring or a semi-square ring;

[0025] The electromagnet 210 is set as a single-redundancy, double-redundancy or multi-redundancy electromagnet.

[0026] The beneficial effects of the present invention are as follows:

[0027] The embodiment of the present invention provides an energized braking electromagnetic brake. Through the design and assembly cooperation of structures such as the housing, end cover, electrical connector, screw, positioning pin, static plate sleeve, static friction plate, pressure plate, half ring, sleeve, etc., the attractive force characteristics of the electromagnet are better utilized to realize the function of the energized braking electromagnetic brake. Specifically, the energized braking function of the electromagnetic brake is realized through the structural layout design of parts such as the moving armature, static armature and spring; when the coil 217 loses power, the installation force of the first spring 208 pushes the sleeve 207 to drive the pressure plate 205 and the moving armature 211 to move outward, realizing the braking release function of the electromagnetic brake. When the coil 217 is energized, the moving armature 211 moves inward under the action of the attractive force of the static armature 210, and overcomes the installation forces of the first spring 208 and the second spring 209, driving the sleeve 207, half ring 206 and pressure plate 205 to move leftward simultaneously, applying the attractive force to the static friction plate 203 and the moving friction plate 204, realizing the braking function of the electromagnetic brake. Description of the Drawings

[0028] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention, and form a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present invention, and do not constitute a limitation to the technical solution of the present invention.

[0029] Figure 1 It is a schematic diagram of the overall structure of an electrified braking electromagnetic brake provided by an embodiment of the present invention;

[0030] Figure 2 is Figure 1 a side view of the electrified braking electromagnetic brake provided by the illustrated embodiment;

[0031] Figure 3 is Figure 2 a cross-sectional view of the electrified braking electromagnetic brake provided by the illustrated embodiment along A-A. Description of the drawings:

[0033] 1 support base, 2 motor, 3 reduction gearbox, 4 deployment mechanism assembly, 5 wing connection member. The reduction gearbox 3 includes: 3-1 gear housing I, 3-2 ball screw assembly, 3-3 intermediate gear, 3-4 gear housing II, 3-5 input gear. The 4 deployment mechanism assembly includes: 4-1 mounting bracket, 4-2 internal gear drive housing I, 4-3 cover plate, 4-4 internal gear drive housing II, 4-5 pinion I, 4-6 rack, 4-7 pinion II. Detailed implementation manners

[0034] To make the purpose, technical solution and advantages of the present invention clearer and more understandable, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0035] As already described in the above background art, existing electromagnetic brakes usually use a control mode of controlling the suction force of the electromagnet when power is off to realize the functions of the mechanism, that is, when powered on, the electromagnet attracts and the braking is released, and when powered off, the electromagnet separates and the braking is applied. For example, both CN201921130945.X and CN201910267035.4 have invented an electromagnetic brake, which achieves braking by controlling the electromagnet when power is off.

[0036] For systems with relatively high requirements for the reliability of braking release, since the braking of the above existing electromagnetic brakes is implemented under the fault condition of the electromagnetic brake (i.e., when power is off), it is difficult to meet the requirements of the system for reliability, that is, this type of power-off braking electromagnetic brake cannot be applied to systems with relatively high requirements for the reliability of braking release.

[0037] In view of the problem that the above-mentioned existing electromagnetic brakes cannot be applied to systems with high requirements for the reliability of brake release, the embodiments of the present invention provide an energized braking electromagnetic brake, realizing the function of the energized braking electromagnetic brake, and its braking principle and implementation method are applicable to systems with high requirements for the reliability of brake release.

[0038] The present invention provides the following specific embodiments that can be combined with each other, and the same or similar concepts or processes may not be described in some embodiments.

[0039] Figure 1 It is a schematic diagram of the overall structure of an energized braking electromagnetic brake provided by the embodiments of the present invention. Figure 2 is Figure 1 a side view of the energized braking electromagnetic brake provided by the illustrated embodiment; Figure 3 is Figure 2 a cross-sectional view of the energized braking electromagnetic brake provided by the illustrated embodiment along A-A.

[0040] Referring to Figures 1 to 3 As shown, the main structure of the energized braking electromagnetic brake provided by the embodiments of the present invention includes: a housing 101, an end cover 102, an electrical connector 103, screws 104, a positioning pin 201, a stationary plate sleeve 202, a stationary friction plate 203, a moving friction plate 204, a pressure plate 205, a half ring 206, a sleeve 207, a first spring 208, a second spring 209, a stationary armature 210, a moving armature 211, a central shaft 212, a first bearing 213, a second bearing 214, and a coil 217;

[0041] Referring to Figures 1 to 3 In the structure of the energized braking electromagnetic brake shown, the housing 101 and the end cover 102 installed at its open end form an installation cavity, and the end cover 102 is fixed to the housing 101 by three screws 104; in the installation cavity, the stationary plate sleeve 202 is fixed to the inner end face of the housing 101 through the positioning pin 201, the inner end of the central shaft 212 is installed on the inner end face of the housing 101 through the second bearing 214, and the outer end is installed on the inner end face of the end cover 102 through the first bearing 213. The central shaft 212 is sequentially sleeved with an overlapping stationary friction plate 203 and a moving friction plate 204, as well as a pressure plate 205, a half ring 206, and a sleeve 207.

[0042] In the electric braking electromagnetic brake provided by the embodiments of the present invention, the second spring 209 is sleeved outside the pressure plate 205, the first spring 208 is sleeved outside the second spring 209, and the first spring 208 and the second spring 209 are separated by the annular isolation cylinder of the sleeve 207.

[0043] In the electro-braking electromagnetic brake provided by the embodiment of the present invention, the static armature 210 and the moving armature 211 are sequentially sleeved on the outer cylinder section of the sleeve 207, and the outer end of the sleeve 207 is limited by the moving armature 211. The coil 217 is nested and installed between the static armature 210 and the moving armature 211. The electrical connector 103 is fixedly installed in the installation cavity extending from the cylinder part of the housing 101, and its cable passes through the through hole on the housing 101 and is electrically connected to the coil 217.

[0044] In the electro-braking electromagnetic brake provided by the embodiment of the present invention, through the design and assembly cooperation of structures such as the housing, end cover, electrical connector, screw, positioning pin, static plate sleeve, static friction plate, pressure plate, half ring, sleeve, etc., the suction force characteristics of the electromagnet are better utilized to realize the function of the electro-braking electromagnetic brake.

[0045] In one implementation manner of the embodiment of the present invention, the static friction plate 203 is fixedly connected with the static plate sleeve 202 sleeved outside it through splines, and the moving friction plate 204 is fixedly connected with the central shaft 212 through splines.

[0046] In one implementation manner of the embodiment of the present invention, both ends of the central shaft 212 are supported by the inner rings of the first bearing 214 and the second bearing 213 respectively. The outer ring of the second bearing 214 is supported by the inner hole provided on the bottom end face of the housing 101, and the outer ring of the first bearing 213 is supported by the inner hole provided on the inner end face of the end cover 102.

[0047] In one implementation manner of the embodiment of the present invention, the pressure plate 205 is connected with the inner end of the sleeve 207 through a half ring 206. In the specific connection form, the inner disc body of the pressure plate 205 is close to the outermost static friction plate 203, the outer pressure cylinder is sleeved on the inner cylinder section of the sleeve 207, and the outer end face of the sleeve 207 abuts against the inner ring boss of the outer end face of the moving armature 211 to limit the outer end of the sleeve 207 through the moving armature 211.

[0048] In one implementation manner of the embodiment of the present invention, the electro-braking electromagnetic brake further includes: a first washer 215 and a second washer 216.

[0049] In this implementation manner, the first washer 215 is pressed on the outer end face of the static plate sleeve 202, and the second spring 209 is pressed on the bottom end face of the annular isolation cylinder in the sleeve 207; the inner side surface of the first spring 208 is supported by the first washer 215, and the outer end face of the first spring 208 is supported by the upper convex ring on the annular isolation cylinder of the sleeve 207; the inner end face of the second spring 209 is supported by the disc end face of the pressure plate 205, and the outer end face of the second spring 209 is supported by the second washer 216; the outer circular surface of the static armature 210 is supported by the inner hole of the housing 101.

[0050] Based on the specific structure of the energized braking electromagnetic brake provided in the above embodiments of the present invention, on the one hand, the energized braking electromagnetic brake can achieve the braking release function of the electromagnetic brake; specifically, the first spring 208 pushes the sleeve 207 to move outward (i.e., move toward the end cover 102), and drives the pressure plate 205 and the moving armature 211 to move outward simultaneously through the half-ring 206, realizing the braking release function of the electromagnetic brake.

[0051] On the other hand, the energized braking electromagnetic brake can achieve the braking function of the electromagnetic brake; specifically, the coil 217 is energized through the electrical connector 103, so that the electromagnetic attraction force generated by the static armature 210 causes the moving armature 211 to move inward (i.e., move toward the friction plate), and after the sleeve 207 overcomes the installation forces of the first spring 208 and the second spring 209, it drives the half-ring 206 and the pressure plate 205 to move inward simultaneously to apply the attraction force to the static friction plate 203 and the moving friction plate 204 to generate a braking torque, realizing the braking function of the electromagnetic brake.

[0052] The energized braking electromagnetic brake provided in the embodiments of the present invention realizes the function of the energized braking electromagnetic brake through the design and assembly cooperation of structures such as the housing, end cover, electrical connector, screw, positioning pin, static plate sleeve, static friction plate, pressure plate, half-ring, sleeve, etc., making good use of the attraction force characteristics of the electromagnet. Specifically, the energized braking function of the electromagnetic brake is realized through the structural layout design of parts such as the moving armature, static armature and spring; when the coil 217 loses power, the installation force of the first spring 208 pushes the sleeve 207 to drive the pressure plate 205 and the moving armature 211 to move outward, realizing the braking release function of the electromagnetic brake. When the coil 217 is energized, the moving armature 211 moves inward under the action of the attraction force of the static armature 210, overcomes the installation forces of the first spring 208 and the second spring 209, and drives the sleeve 207, half-ring 206 and pressure plate 205 to move leftward simultaneously, applying the attraction force to the static friction plate 203 and the moving friction plate 204, realizing the braking function of the electromagnetic brake.

[0053] It should be noted that the first spring 208 and the second spring 209 in the embodiments of the present invention can be spiral springs, but are not limited to spiral springs. For example, disc springs can be used.

[0054] The static friction plate 203 in the embodiments of the present invention is not limited to Figure 3 the 6 pieces shown in Figure 3 and the moving friction plate 204 is not limited to

[0055] the 5 pieces shown in

[0056] The electromagnet 210 in the embodiments of the present invention can be set as a single-redundancy, dual-redundancy or multi-redundancy electromagnet.

[0057] The working mode of the energized braking electromagnetic brake provided in the above embodiments of the present invention is described as follows:

[0058] (1) Energized braking:

[0059] Referring to Figure 3 As shown, when the coil 217 is energized, the moving armature 211 moves to the left under the action of the suction force of the static armature 210. After the suction force acting on the moving armature 211 overcomes the installation forces of the first spring 208 and the second spring 209, it acts on the static friction plate 203 and the moving friction plate 204 through the pressure plate 205, the half-ring 206 and the sleeve 207 to generate a braking torque. The moving friction plate 204 transmits the braking torque to the central shaft 212 through the spline between it and the central shaft 212, making the solenoid valve brake in the braking state.

[0060] (2) Power-off to release braking:

[0061] Referring to Figure 3 As shown, when the coil 217 is powered off, the sleeve 207 moves to the right under the action of the installation force of the first spring 208, and drives the pressure plate 205, the half-ring 206, the second spring 209 and the moving armature 211 to move to the right at the same time, and releases the positive pressure acting on the static friction plate 203 and the moving friction plate 204, making the solenoid valve brake in the state of releasing braking.

[0062] Although the disclosed embodiments of the present invention are as above, the described content is only the embodiments adopted for the convenience of understanding the present invention and is not used to limit the present invention. Any person skilled in the art within the scope of the present invention can make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed by the present invention. However, the scope of patent protection of the present invention shall still be subject to the scope defined by the appended claims.

Claims

1. An electrically actuated braking electromagnetic brake, characterized in that, Including: A housing (101), an end cover (102), an electrical connector (103), screws (104), a positioning pin (201), a stationary plate sleeve (202), a stationary friction plate (203), a moving friction plate (204), a pressure plate (205), a half ring (206), a sleeve (207), a first spring (208), a second spring (209), a stationary armature (210), a moving armature (211), a central shaft (212), a first bearing (213), a second bearing (214), and a coil (217); Wherein, the housing (101) and the end cover (102) installed at its open end form an installation cavity, and the end cover (102) is fixed to the housing (101) by a plurality of circumferentially arranged screws (104); in the installation cavity, the stationary plate sleeve (202) is fixed to the inner end face of the housing (101) by the positioning pin (201), the inner end of the central shaft (212) is installed on the inner end face of the housing (101) through the second bearing (214), and the outer end is installed on the inner end face of the end cover (102) through the first bearing (213). The central shaft (212) is sequentially sleeved with an overlapping stationary friction plate (203) and a moving friction plate (204), as well as a pressure plate (205), a half ring (206), and a sleeve (207); The second spring (209) is sleeved outside the pressure plate (205), and the first spring (208) is sleeved outside the second spring (209), and the first spring (208) and the second spring (209) are separated by the annular isolation cylinder of the sleeve (207); The stationary armature (210) and the moving armature (211) are sequentially sleeved on the outer cylinder section of the sleeve (207), and the outer end of the sleeve (207) is limited by the moving armature (211). The coil (217) is nested and installed between the stationary armature (210) and the moving armature (211). The electrical connector (103) is fixedly installed in the installation cavity extending from the barrel part of the housing (101), and its cable passes through the through hole on the housing (101) and is electrically connected to the coil (217).

2. The electrically actuated braking electromagnetic brake according to claim 1, characterized in that, The stationary friction plate (203) is fixedly connected to the stationary plate sleeve (202) sleeved outside it by a spline, and the moving friction plate (204) is fixedly connected to the central shaft (212) by a spline.

3. The electrically actuated braking electromagnetic brake according to claim 2, characterized in that, Both ends of the central shaft (212) are supported by the inner rings of the first bearing (214) and the second bearing (213) respectively. The outer ring of the second bearing (214) is supported by the inner hole provided on the bottom end face of the housing (101), and the outer ring of the first bearing (213) is supported by the inner hole provided on the inner end face of the end cover (102).

4. The electrically actuated braking electromagnetic brake according to claim 1, characterized in that, The pressure plate (205) is connected to the inner end of the sleeve (207) through the half ring (206); wherein, the inner disc body of the pressure plate (205) is close to the outermost stationary friction plate (203), and the outer pressure cylinder is sleeved on the inner cylinder section of the sleeve (207). The outer end face of the sleeve (207) abuts against the inner ring boss of the outer end face of the moving armature (211) to limit the outer end of the sleeve (207) through the moving armature (211).

5. The electrically actuated braking electromagnetic brake according to claim 1, characterized in that, Also including: A first washer (215) and a second washer (216); Among them, the first washer (215) is pressed on the outer end face of the static plate sleeve (202), and the second spring (209) is pressed on the bottom end face of the annular isolation cylinder in the sleeve (207); the inner side surface of the first spring (208) is supported by the first washer (215), and the outer end face of the first spring (208) is supported by the upper convex ring of the annular isolation cylinder of the sleeve (207); the inner end face of the second spring (209) is supported by the disk body end face of the pressure plate (205), and the outer end face of the second spring (209) is supported by the second washer (216); the outer circular surface of the static armature (210) is supported by the inner hole of the housing (101).

6. The electrically actuated braking electromagnetic brake according to any one of claims 1 to 5, characterized in that, The energized braking electromagnetic brake is used to push the sleeve (207) to move outward through the first spring (208), and drive the pressure plate (205) and the moving armature (211) to move outward simultaneously through the half ring (206) to realize the brake release function of the electromagnetic brake.

7. The electrically actuated braking electromagnetic brake according to any one of claims 1 to 5, characterized in that, The energized braking electromagnetic brake is also used to energize the coil (217) through the electrical connector (103), so that the electromagnetic attraction force generated by the static armature (210) makes the moving armature (211) move inward, and drives the half ring (206) and the pressure plate (205) to move inward simultaneously after overcoming the installation forces of the first spring (208) and the second spring (209) through the sleeve (207) to apply the attraction force to the static friction plate (203) and the moving friction plate (204) to generate a braking torque, realizing the braking function of the electromagnetic brake.

8. The electrically actuated braking electromagnetic brake according to any one of claims 1 to 5, characterized in that, The first spring (208) and the second spring (209) adopt spiral springs or disc springs; The half ring (206) is set as a semi-circular ring or a semi-square ring; The electromagnet (210) is set as a single-redundancy, double-redundancy or multi-redundancy electromagnet.

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