brake

Abstract

This invention relates to a brake, comprising: a bracket; a first motor, a first transmission device, and a first friction plate; the first friction plate is slidably disposed on the bracket; the first motor drives the first friction plate to slide via the first transmission device; a second motor, a second transmission device, and a second friction plate; the second friction plate is slidably disposed on the bracket; the second motor drives the second friction plate to slide via the second transmission device; the first motor and the second motor may be the same or different; the first transmission device and the second transmission device may be the same or different; the first friction plate and the second friction plate may be the same or different. The brake of this invention has two sets of motors, transmission devices, and friction plates, one of which can be used as the primary braking device, and the other as a parking and backup braking device. When the primary braking device fails to function properly, the backup braking device can provide temporary braking, avoiding the safety risk of only one braking device failing and thus providing high safety. The two sets of motors, transmission devices, and friction plates in this invention share a single bracket, resulting in a compact structure and small footprint.

Description

Technical Field

[0001] This invention relates to a brake. Background Technology

[0002] Electromechanical brakes (EMBs) are purely electronically controlled brakes. In practical use, purely electronic brakes increase the risk of failure; for example, power supply failures or communication failures can cause the brakes to malfunction compared to purely mechanical brakes. When a circuit fault or motor failure occurs, the brakes cannot function properly, and a vehicle without braking capability poses a significant safety risk. Therefore, how to enhance the safety of brakes and avoid the safety risks caused by motor or circuit failures is one of the important technical problems that those skilled in the art need to solve. Summary of the Invention

[0003] One of the objectives of this invention is to overcome the shortcomings of the prior art and provide a brake that offers greater safety during use.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0005] The brake, characterized in that it comprises:

[0006] support;

[0007] A first motor, a first transmission device, and a first friction plate; the first friction plate is slidably mounted on the bracket; the first motor drives the first friction plate to slide via the first transmission device;

[0008] A second motor, a second transmission device, and a second friction plate; the second friction plate is slidably mounted on the bracket; the second motor drives the second friction plate to slide via the second transmission device;

[0009] The first motor may be the same as or different from the second motor; the first transmission device may be the same as or different from the second transmission device; the first friction plate may be the same as or different from the second friction plate.

[0010] According to one embodiment of the present invention, the bracket is provided with a first receiving groove and a second receiving groove; the first friction plate is installed in the first receiving groove, and the second friction plate is installed in the second receiving groove.

[0011] According to one embodiment of the present invention, the bracket includes a base extending laterally and a first flange, a second flange, and a third flange extending vertically; the first flange and the second flange are located at both ends of the base and protrude vertically from the base; the third flange is located between the first flange and the second flange and protrudes vertically from the base; the two ends of the first friction piece are respectively connected to the first flange and the third flange, and the two ends of the second friction piece are respectively connected to the second flange and the third flange.

[0012] According to one embodiment of the present invention, a first flange is provided with a first mounting groove, a second flange is provided with a second mounting groove, a third flange is provided with a third mounting groove and a fourth mounting groove, the two ends of the first friction plate are respectively installed in the first mounting groove and the third mounting groove, and the two ends of the second friction plate are respectively installed in the second mounting groove and the fourth mounting groove;

[0013] The first mounting slot and the third mounting slot are symmetrically arranged, and the second mounting slot and the fourth mounting slot are asymmetrically arranged; or, the first mounting slot and the third mounting slot are asymmetrically arranged, and the second mounting slot and the fourth mounting slot are symmetrically arranged.

[0014] According to one embodiment of the present invention, the first friction plate is provided with a pair of first lugs, the pair of first lugs being symmetrically arranged; the second friction plate is provided with a pair of second lugs, the pair of second lugs being asymmetrically arranged.

[0015] According to one embodiment of the present invention, a first guide pin is provided on the first flange; a second guide pin is provided on the second flange; a third guide pin and a fourth guide pin are provided on the third flange; the brake further includes a first housing and a second housing, the first housing being connected to the first guide pin and the third guide pin; the second housing being connected to the second guide pin and the fourth guide pin, and the first guide pin, the second guide pin, the third guide pin and the fourth guide pin are all slidably disposed relative to the bracket.

[0016] According to one embodiment of the present invention, a first guide pin is provided on the first flange; a second guide pin is provided on the second flange; a fifth guide pin is provided on the third flange; the brake further includes a first housing and a second housing, the first housing being connected to the first guide pin and the fifth guide pin; the second housing being connected to the second guide pin and the fifth guide pin, the first guide pin and the second guide pin being slidably disposed relative to the bracket; the fifth guide pin being fixedly disposed relative to the bracket, and the first housing and the second housing being slidably disposed along the fifth guide pin.

[0017] According to one embodiment of the present invention, the power of the first motor is greater than that of the second motor; the size of the first friction plate is greater than that of the second friction plate.

[0018] According to one embodiment of the present invention, the first transmission device includes a ball screw, and the second transmission device includes a screw nut, wherein the screw nut is composed of a lead screw and a nut.

[0019] The brake in this invention comprises two sets of motors, transmission devices, and friction plates. One set can be used as the primary braking device, while the other serves as a parking and backup braking device. When the primary braking device fails, the backup braking device can provide temporary braking, avoiding the safety risk of only one braking device failing and thus providing high safety. The two sets of motors, transmission devices, and friction plates share a single bracket, resulting in a compact structure and small footprint. The first and third mounting slots, or the second and fourth mounting slots, are asymmetrically arranged. The two mounting slots on the third flange can be staggered to prevent the third flange from becoming excessively large due to the presence of two mounting slots. A fifth guide pin is provided, allowing both the first and second motor housings to be fitted onto it. The fifth guide pin's fixed installation further simplifies the structure of this invention and makes it convenient to use. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the brake structure in Embodiment 1 of the present invention.

[0021] Figure 2 This is an exploded view of the brake structure in Embodiment 1 of the present invention.

[0022] Figure 3 This is a schematic diagram of the support, first friction plate, and second friction plate in Embodiment 1 of the present invention.

[0023] Figure 4 This is a schematic diagram of the support structure in Embodiment 1 of the present invention.

[0024] Figure 5 This is a front view of the bracket in Embodiment 1 of the present invention.

[0025] Figure 6 This is a schematic diagram of the first friction plate structure in Embodiment 1 of the present invention.

[0026] Figure 7 This is a schematic diagram of the second friction plate structure in Embodiment 1 of the present invention.

[0027] Figure 8 This is a partial structural diagram of Embodiment 2 of the present invention.

[0028] Figure 9This is a schematic diagram of the support structure in Embodiment 2 of the present invention.

[0029] Figure 10 This is a schematic diagram of the brake in use according to the present invention. Detailed Implementation Example 1

[0030] like Figure 1 , Figure 2 As shown, the brake 100 includes a bracket 110, a first motor 120, a first transmission device, a first friction plate 140, a second motor 150, a second transmission device, and a second friction plate 170. The first motor 120, the first transmission device, the first friction plate 140, the second motor 150, the second transmission device, and the second friction plate 170 are all connected to the bracket 110. The first friction plate 140 is slidably mounted on the bracket 110. The first motor 120 drives the first friction plate 140 to slide via the first transmission device. The second friction plate 170 is slidably mounted on the bracket 110; the second motor 150 drives the second friction plate 170 to slide via the second transmission device.

[0031] like Figures 3 to 5As shown, the bracket 110 includes a base 111 extending laterally and a first flange 112, a second flange 113, and a third flange 114 extending vertically. The first flange 112 and the second flange 113 are located at both ends of the base 111 and protrude vertically from the base 111; the third flange 114 is located between the first flange 112 and the second flange 113 and protrudes vertically from the base 111. The bracket 110 is approximately "mountain" shaped. The first flange 112 and the third flange 114 form a first receiving groove 115. The second flange 113 and the third flange 114 form a second receiving groove 116. Two first mounting grooves 1121 are provided on the first flange 112. The two first mounting grooves 1121 are spaced apart. Two second mounting grooves 1131 are provided on the second flange 113. The two second mounting grooves 1131 are spaced apart. The third flange 114 is provided with two third mounting grooves 1141 and two fourth mounting grooves 1142. The two third mounting grooves 1141 are spaced apart. The two fourth mounting grooves 1142 are spaced apart. The first mounting groove 1121 and the third mounting groove 1141 are symmetrically arranged. The second mounting groove 1131 and the fourth mounting groove 1142 are asymmetrically arranged. The first flange 112 is provided with a first pin hole 1122. The second flange 113 is provided with a second pin hole 1132. The third flange 114 is provided with a third pin hole 1133 and a fourth pin hole 1134. The first pin hole 1122, the second pin hole 1132, the third pin hole 1133, and the fourth pin hole 1134 can all be blind holes or through holes. In this embodiment, the first pin hole 1122, the second pin hole 1132, the third pin hole 1133, and the fourth pin hole 1134 are all blind holes. A first guide pin 1151 is installed in the first pin hole 1122. The end of the first guide pin 1151 extends out of the first pin hole 1122 and can slide along the first pin hole 1122. A second guide pin 1152 is disposed in the second pin hole 1132. The end of the second guide pin 1152 extends out of the second pin hole 1132 and can slide along the second pin hole 1132. A third guide pin 1153 is disposed in the third pin hole 1133. The end of the third guide pin 1153 extends out of the third pin hole 1133 and can slide along the third pin hole 1133. A fourth guide pin 1154 is disposed in the fourth pin hole 1134. The end of the fourth guide pin 1154 extends out of the fourth pin hole 1134 and can slide along the fourth pin hole 1134.

[0032] like Figure 6As shown, the first friction plate 140 includes a first inner friction plate 141 and a first outer friction plate 142. The first inner friction plate 141 includes a first friction plate body 143 and a pair of first lugs 144. The pair of first lugs 144 are respectively disposed at both ends of the first friction plate body 143 and protrude from the first friction plate body 143. The pair of first lugs 144 are symmetrically disposed at both ends of the first friction plate body 143. The structure of the first outer friction plate 142 is the same as that of the first inner friction plate 141. The first friction plate 140 is installed in the first receiving groove 115. The pair of first lugs 144 of the first inner friction plate 141 are respectively located in the first mounting groove 1121 and the third mounting groove 1141, and are connected to the first flange 112 and the third flange 114 by a spring member (not shown in the figure). The spring member can use the spring member structure in the prior art, which will not be described in detail here. The pair of first lugs 144 can slide along the first mounting groove 1121 and the third mounting groove 1141. A pair of first lugs of the first external friction plate 142 are respectively installed in another first mounting groove 1121 and another third mounting groove 1141, and can slide.

[0033] like Figure 7 As shown, the second friction plate 170 includes a second inner friction plate 171 and a second outer friction plate 172. The second inner friction plate 171 includes a second friction plate body 173 and a pair of second lugs 174. The pair of second lugs 174 are respectively disposed at both ends of the second friction plate body 173 and protrude from the second friction plate body 173. The pair of second lugs 174 are asymmetrically disposed at both ends of the second friction plate body 173. The structure of the second outer friction plate 172 is the same as that of the second inner friction plate 171. The second friction plate 170 is installed in the second receiving groove 116. The pair of second lugs 174 of the second inner friction plate 171 are respectively located in the second mounting groove 1131 and the fourth mounting groove 1142, and are connected to the second flange 113 and the third flange 114 by spring members. The spring members can use the spring member structure in the prior art, which will not be described in detail here. The pair of second lugs 174 can slide along the second mounting groove 1131 and the fourth mounting groove 1142. A pair of second lugs of the second outer friction plate 172 are respectively installed in another second mounting groove 1131 and another fourth mounting groove 1142, and are slidable. The first friction plate body 143 and the second friction plate body 173 can be the same size or different sizes. In this embodiment, the size of the first friction plate body 143 is larger than the size of the second friction plate body 173.

[0034] like Figure 1 , Figure 2As shown, the brake 100 of the present invention further includes a first housing 181 and a second housing 182. The first housing 181 is provided with two first lugs 183. The two first lugs 183 are fixedly connected to a first guide pin 1151 and a third guide pin 1153, respectively. The second housing 182 is provided with two second lugs 184. The two second lugs 184 are fixedly connected to a second guide pin 1152 and a fourth guide pin 1154, respectively. Both the first housing 181 and the second housing 182 are slidably connected to the bracket 110. A first gearbox 131 and a ball screw 132 are mounted on the first housing 181. A first gear mechanism and a first printed circuit board (not shown in the figure) are provided inside the first gearbox 131. The first gear mechanism is driven by the ball screw 132. A first motor 120 is also mounted on the first gearbox 131. The first motor 120 is driven by the first gear mechanism. The first motor 120 is controlled by a control device on the first printed circuit board. The first motor 120 drives the ball screw 132 via a first gear mechanism. A lead screw nut 161 and a second gearbox 162 are also mounted on the second housing 182. The second gearbox 162 houses a second gear mechanism and a second printed circuit board. The lead screw nut 161 consists of a lead screw 163 and a nut 164. A second motor 150 is mounted on the second gearbox 162. The second gear mechanism is driven by the lead screw nut 161. The second motor 150 is also driven by the second gear mechanism. The second motor 150 is controlled by a control device on the second printed circuit board. The second motor 150 drives the lead screw nut 161 via the second gear mechanism. The first motor and the second motor can be the same or different. In this embodiment, the power of the first motor 120 is greater than the power of the second motor 150.

[0035] The first transmission device and the second transmission device may be the same or different. In this embodiment, they are different. The first transmission device includes a first gear mechanism and a ball screw 132. The second transmission device includes a second gear mechanism and a screw nut 161. Relatively speaking, the ball screw 132 can transmit a larger torque, while the screw nut 161 is only used to transmit a smaller torque. The first gear mechanism and the second gear mechanism can use structures commonly used in the prior art, which will not be described in detail here. Example 2

[0036] The main differences between this embodiment and Embodiment 1 are the different support structures and the different connection methods between the support and the first housing 181 and the second housing 182.

[0037] like Figure 1 , Figure 2As shown, the brake 100 includes a bracket 110, a first motor 120, a first transmission device, a first friction plate 140, a second motor 150, a second transmission device, and a second friction plate 170. The first motor 120, the first transmission device, the first friction plate 140, the second motor 150, the second transmission device, and the second friction plate 170 are all connected to the bracket 110. The first friction plate 140 is slidably disposed on the bracket 110; the first motor 120 drives the first friction plate 140 to slide via the first transmission device. The second friction plate 170 is slidably disposed on the bracket 110; the second motor 150 drives the second friction plate 170 to slide via the second transmission device.

[0038] like Figure 8 , Figure 9As shown, the bracket 110 includes a base 111 extending laterally and a first flange 112, a second flange 113, and a third flange 114 extending vertically. The first flange 112 and the second flange 113 are located at both ends of the base 111 and protrude vertically from the base 111; the third flange 114 is located between the first flange 112 and the second flange 113 and protrudes vertically from the base 111. The bracket 110 is approximately "mountain" shaped. The first flange 112 and the third flange 114 form a first receiving groove 115. The second flange 113 and the third flange 114 form a second receiving groove 116. Two first mounting grooves 1121 are provided on the first flange 112. The two first mounting grooves 1121 are spaced apart. Two second mounting grooves 1131 are provided on the second flange 113. The two second mounting grooves 1131 are spaced apart. The third flange 114 is provided with two third mounting grooves 1141 and two fourth mounting grooves 1142. The two third mounting grooves 1141 are spaced apart. The two fourth mounting grooves 1142 are spaced apart. The first mounting groove 1121 is symmetrically arranged with the third mounting groove 1141. The second mounting groove 1131 is asymmetrically arranged with the fourth mounting groove 1142. The first flange 112 is provided with a first pin hole 1122. The second flange 113 is provided with a second pin hole 1132. The third flange 114 is provided with a fifth pin hole 1135. The first pin hole 1122, the second pin hole 1132, and the fifth pin hole 1135 can all be blind holes or through holes. In this embodiment, the first pin hole 1122 and the second pin hole 1132 are through holes, and the fifth pin hole 1135 is a blind hole. A first guide pin 1151 is installed in the first pin hole 1122. The end of the first guide pin 1151 extends out of the first pin hole 1122 and can slide along the first pin hole 1122. A second guide pin 1152 is provided in the second pin hole 1132. The end of the second guide pin 1152 extends out of the second pin hole 1132 and can slide along the second pin hole 1132. A fifth guide pin 145 is provided in the fifth pin hole 1135. The end of the fifth guide pin 145 extends out of the fifth pin hole 1135 and is fixedly connected to the bracket 110.

[0039] like Figure 6As shown, the first friction plate 140 includes a first inner friction plate 141 and a first outer friction plate 142. The first inner friction plate 141 includes a first friction plate body 143 and a pair of first lugs 144. The pair of first lugs 144 are respectively disposed at both ends of the first friction plate body 143 and protrude from the first friction plate body 143. The pair of first lugs 144 are symmetrically disposed at both ends of the first friction plate body 143. The structure of the first outer friction plate 142 is the same as that of the first inner friction plate 141. The first friction plate 140 is installed in the first receiving groove 115. The pair of first lugs 144 of the first inner friction plate 141 are respectively located in the first mounting groove 1121 and the third mounting groove 1141, and are connected to the first flange 112 and the third flange 114 by a spring member (not shown in the figure). The spring member can use the spring member structure in the prior art, which will not be described in detail here. The pair of first lugs 144 can slide along the first mounting groove 1121 and the third mounting groove 1141. A pair of first lugs of the first external friction plate 142 are respectively installed in another first mounting groove 1121 and another third mounting groove 1141, and can slide.

[0040] like Figure 7 As shown, the second friction plate 170 includes a second inner friction plate 171 and a second outer friction plate 172. The second inner friction plate 171 includes a second friction plate body 173 and a pair of second lugs 174. The pair of second lugs 174 are respectively disposed at both ends of the second friction plate body 173 and protrude from the second friction plate body 173. The pair of second lugs 174 are asymmetrically disposed at both ends of the second friction plate body 173. The structure of the second outer friction plate 172 is the same as that of the second inner friction plate 171. The second friction plate 170 is installed in the second receiving groove 116. The pair of second lugs 174 of the second inner friction plate 171 are respectively located in the second mounting groove 1131 and the fourth mounting groove 1142, and are connected to the second flange 113 and the third flange 114 by spring members. The spring members can use the spring member structure in the prior art, which will not be described in detail here. The pair of second lugs 174 can slide along the second mounting groove 1131 and the fourth mounting groove 1142. A pair of second lugs of the second outer friction plate 172 are respectively installed in another second mounting groove 1131 and another fourth mounting groove 1142, and are slidable. The first friction plate body 143 and the second friction plate body 173 can be the same size or different sizes. In this embodiment, the size of the first friction plate body 143 is larger than the size of the second friction plate body 173.

[0041] like Figure 8 , Figure 9As shown, the brake 100 of the present invention further includes a first housing 181 and a second housing 182. The first housing 181 is provided with two first lugs 183. One first lug 183 is fixedly connected to a first guide pin 1151, and the other first lug 183 is movably connected to a fifth guide pin 145. The second housing 182 is provided with two second lugs 184. One second lug 184 is fixedly connected to a second guide pin 1152, and the other second lug 184 is movably connected to the fifth guide pin 145. Both the first housing 181 and the second housing 182 can slide relative to the fifth guide pin 145, that is, they can slide relative to the bracket 110. A first gearbox 131 and a ball screw 132 are mounted on the first housing 181. A first gear mechanism and a first printed circuit board (not shown in the figure) are provided inside the first gearbox 131. The first gear mechanism is driven by the ball screw 132. A first motor 120 is also mounted on the first gearbox 131. The first motor 120 is driven by the first gear mechanism. The first motor 120 is controlled by a control device on the first printed circuit board. The first motor 120 drives the ball screw 132 via a first gear mechanism. A lead screw nut 161 and a second gearbox 162 are also mounted on the second housing 182. The second gearbox 162 houses a second gear mechanism and a second printed circuit board. The lead screw nut 161 consists of a lead screw 163 and a nut 164. A second motor 150 is mounted on the second gearbox 162. The second gear mechanism is driven by the lead screw nut 161. The second motor 150 is also driven by the second gear mechanism. The second motor 150 is controlled by a control device on the second printed circuit board. The second motor 150 drives the lead screw nut 161 via the second gear mechanism. The first motor and the second motor can be the same or different. In this embodiment, the power of the first motor 120 is greater than the power of the second motor 150.

[0042] The first transmission device and the second transmission device may be the same or different. In this embodiment, they are different. The first transmission device includes a first gear mechanism and a ball screw 132. The second transmission device includes a second gear mechanism and a screw nut 161. Relatively speaking, the ball screw 132 can transmit a larger torque, while the screw nut 161 is only used to transmit a smaller torque. The first gear mechanism and the second gear mechanism can use structures commonly used in the prior art, which will not be described in detail here.

[0043] In this invention, the first motor 120, the first transmission device, and the first friction plate 140 are used as an EMB (electromechanical braking system); the second motor 150, the second transmission device, and the second friction plate 170 can be used as an EPB (electronic parking brake system) and can also serve as a backup EMB.

[0044] like Figure 10As shown, in use, the first motor 120 drives the first friction plate 140 to slide via the first transmission device, causing the first friction plate 140 to contact the brake disc 200 for braking. The second friction plate 170 is slidably mounted on the bracket 110; the second motor 150 drives the second friction plate 170 to slide via the second transmission device, causing the second friction plate 170 to contact the brake disc 200 for parking. The function of the first friction plate 140 is braking. The main function of the second friction plate 170 is parking. However, when the first friction plate 140 fails to provide braking for various reasons, the second friction plate 170 can be used for braking.

[0045] The brake in this invention comprises two sets of motors, transmission devices, and friction plates. One set can be used as the primary braking device, while the other serves as a parking and backup braking device. When the primary braking device fails, the backup braking device can provide temporary braking, avoiding the safety risk of only one braking device failing and thus providing high safety. The two sets of motors, transmission devices, and friction plates share a single bracket, resulting in a compact structure and small footprint. The first and third mounting slots, or the second and fourth mounting slots, are asymmetrically arranged. The two mounting slots on the third flange can be staggered to prevent the third flange from becoming excessively large due to the presence of two mounting slots. A fifth guide pin is provided, allowing both the first and second motor housings to be fitted onto it. The fifth guide pin's fixed installation further simplifies the structure of this invention and makes it convenient to use.

[0046] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions or improvements within the spirit of the present invention are covered within the scope of the claims of the present invention.

Claims

1. A brake, characterized in that, include: support; A first motor, a first transmission device, and a first friction plate; The first friction pad is slidably disposed on the bracket; The first motor drives the first friction plate to slide via the first transmission device; A second motor, a second transmission device, and a second friction plate; the second friction plate is slidably mounted on the bracket; The second motor drives the second friction plate to slide via the second transmission device; The first motor may be the same as or different from the second motor; the first transmission device may be the same as or different from the second transmission device; the first friction plate may be the same as or different from the second friction plate. The bracket is provided with a first receiving groove and a second receiving groove; the first friction plate is installed in the first receiving groove, and the second friction plate is installed in the second receiving groove; The bracket includes a base extending laterally and a first flange, a second flange, and a third flange extending vertically; the first flange and the second flange are located at both ends of the base and protrude vertically from the base; the third flange is located between the first flange and the second flange and protrudes vertically from the base; the two ends of the first friction plate are respectively connected to the first flange and the third flange, and the two ends of the second friction plate are respectively connected to the second flange and the third flange.

2. The brake according to claim 1, characterized in that, The first flange is provided with a first mounting groove, the second flange is provided with a second mounting groove; the third flange is provided with a third mounting groove and a fourth mounting groove; the two ends of the first friction plate are respectively installed in the first mounting groove and the third mounting groove; the two ends of the second friction plate are respectively installed in the second mounting groove and the fourth mounting groove. The first mounting slot and the third mounting slot are symmetrically arranged, and the second mounting slot and the fourth mounting slot are asymmetrically arranged; or, the first mounting slot and the third mounting slot are asymmetrically arranged, and the second mounting slot and the fourth mounting slot are symmetrically arranged.

3. The brake according to claim 2, characterized in that, The first friction plate is provided with a pair of first lugs, which are symmetrically arranged; the second friction plate is provided with a pair of second lugs, which are asymmetrically arranged.

4. The brake according to claim 1, characterized in that, A first guide pin is provided on the first flange; a second guide pin is provided on the second flange; a third guide pin and a fourth guide pin are provided on the third flange; the brake also includes a first housing and a second housing, the first housing being connected to the first guide pin and the third guide pin; the second housing being connected to the second guide pin and the fourth guide pin, and the first guide pin, the second guide pin, the third guide pin and the fourth guide pin are all slidably disposed relative to the bracket.

5. The brake according to claim 1, characterized in that, A first guide pin is provided on the first flange; a second guide pin is provided on the second flange; a fifth guide pin is provided on the third flange; the brake also includes a first housing and a second housing, the first housing being connected to the first guide pin and the fifth guide pin; the second housing being connected to the second guide pin and the fifth guide pin, the first guide pin and the second guide pin being slidably disposed relative to the bracket; the fifth guide pin being fixedly disposed relative to the bracket, and the first housing and the second housing being slidably disposed along the fifth guide pin.

6. The brake according to claim 1, characterized in that, The power of the first motor is greater than that of the second motor; the size of the first friction plate is greater than that of the second friction plate.

7. The brake according to claim 1, characterized in that, The first transmission device includes a ball screw, and the second transmission device includes a screw nut, wherein the screw nut is composed of a screw rod and a nut.

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