Drive mechanism housing of the brake and drive mechanism of the brake

Abstract

The application relates to a brake driving mechanism shell and a brake driving mechanism. The brake driving mechanism shell is characterized in that the shell encloses a cavity; and a retainer is arranged in the cavity and connected with the shell. Compared with the prior art, the application has the following beneficial effects: 1. simplifying the whole vehicle braking system architecture; 2. realizing brake electronic control and providing a basis for automatic driving; 3. improving brake efficiency; and 4. reducing energy loss caused by vehicle drag and improving vehicle endurance.

Description

TECHNICAL FIELD

[0001] The present application relates to a brake driving mechanism housing and a brake driving mechanism. BACKGROUND

[0002] The conventional vehicle brake system is a hydraulic brake system. During braking, the driver needs to press the brake pedal to pressurize the brake system to realize the braking function. The conventional hydraulic brake system is complex and precise, and the structure is also relatively complex. This traditional brake system is not conducive to the realization of vehicle automatic driving and other functions, and cannot realize electric control braking, and must be operated by the driver to realize braking. Due to the inability to realize electric control, the development of vehicle automatic driving technology is hindered. SUMMARY

[0003] One of the purposes of the present application is to overcome the deficiencies in the prior art and provide a brake driving mechanism housing and a brake driving mechanism.

[0004] To achieve the above purpose, the present application realizes the following technical scheme:

[0005] A brake driving mechanism housing, characterized in that it comprises:

[0006] An outer shell, which encloses a cavity;

[0007] A retainer, which is arranged in the cavity and is connected to the outer shell.

[0008] According to an embodiment of the present application, the retainer divides the cavity into two parts.

[0009] According to an embodiment of the present application, the outer shell comprises an outer shell body and an upper cover, the upper cover is connected to the outer shell body and encloses the cavity; the retainer is made of the same material as the outer shell body.

[0010] According to an embodiment of the present application, the upper cover is made of metal material, and the outer shell body is made of plastic.

[0011] According to an embodiment of the present application, the outer shell comprises an outer shell body and an upper cover, the upper cover is connected to the outer shell body and encloses the cavity; the upper cover is made of metal material; the upper cover is provided with a protrusion.

[0012] According to an embodiment of the present application, the retainer comprises a retainer body, and the retainer body is provided with a receiving groove.

[0013] According to an embodiment of the present application, the holder body is provided with a boss, a post and / or a limiting protrusion.

[0014] According to an embodiment of the present application, the holder body is provided with a pin, and the boss is arranged around the pin and protrudes from the holder body.

[0015] According to an embodiment of the present application, the housing is provided with a torque output interface and a wire harness interface, and the torque output interface and the wire harness interface are towards the same direction.

[0016] A driving mechanism of a brake, characterized in that it comprises:

[0017] The housing as described above;

[0018] A motor, comprising a motor shell and a motor shaft, wherein the motor shaft extends out of the motor shell;

[0019] A transmission mechanism;

[0020] An output shaft, which is movably arranged;

[0021] The transmission mechanism is arranged in the cavity, the motor is arranged outside the cavity, the motor shaft extends into the cavity and is connected with the transmission mechanism, and the motor drives the output shaft to move through the motor shaft and the transmission mechanism.

[0022] An electronic control circuit board, which is arranged in the cavity of the housing and is used to control the operation of the motor.

[0023] According to an embodiment of the present application, the holder comprises a holder body and a connecting member, the holder body is connected with the connecting member, the holder body is connected with the housing through the connecting member, the electronic control circuit board is arranged on the holder body, and the electronic control circuit board and the transmission mechanism are arranged on two sides of the holder body, respectively.

[0024] According to an embodiment of the present application, the driving mechanism of the brake further comprises a locking mechanism, which is arranged to lock the motor shaft, the transmission mechanism and / or the output shaft in at least one direction and is arranged to be unlocked, wherein when the locking mechanism locks the motor shaft, the transmission mechanism and / or the output shaft, the rotation of the motor shaft, the transmission mechanism and / or the output shaft is limited, and when the locking mechanism is unlocked, the motor shaft, the transmission mechanism and the output shaft can rotate, the locking mechanism comprises a driving device, and the electronic control circuit board controls the operation of the driving device.

[0025] According to one embodiment of the present application, the stop mechanism comprises a driving device, a ratchet wheel and a pawl; the ratchet wheel is sleeved on the motor shaft, and the ratchet wheel cooperates with the pawl; the driving device drives the pawl to move.

[0026] According to one embodiment of the present application, the holder is provided with a protruding column and / or a limiting protrusion; the protruding column is located above the pawl to limit the axial displacement of the pawl; the limiting protrusion is located above the driving device to limit the axial displacement of the driving device.

[0027] According to one embodiment of the present application, the transmission mechanism comprises an external gear, and the holder is provided with a boss located above the external gear to limit the axial displacement of the external gear.

[0028] According to one embodiment of the present application, the driving device is an electromagnet.

[0029] According to one embodiment of the present application, the shell is provided with a torque output interface and a wire harness interface, and the torque output interface and the wire harness interface are oriented in the same direction; the motor protrudes out of the shell; the direction in which the motor protrudes out of the shell is the same as the orientation of the torque output interface and the wire harness interface.

[0030] The driving mechanism shell of the brake and the driving mechanism of the brake in the present application are provided with a holder in the shell, which can divide the cavity of the shell into two parts, facilitating the installation of the circuit board and avoiding the mutual interference of the transmission mechanism and the circuit board. The holder and the shell are made of the same material, facilitating the connection and fixation of the holder and the shell, especially when they are both made of plastic, hot riveting can be used for connection, facilitating assembly. The upper cover is made of metal material, and the heat dissipation effect is better. The protrusion provided on the upper cover can contact the circuit board, and the heat of the circuit board is transmitted to the upper cover through the protrusion, and then dissipated through the upper cover, which can help the circuit board dissipate heat quickly. The holder is provided with a receiving groove for accommodating the protruding components on the circuit board, making the installation of the circuit board more stable. The boss provided around the pin shaft is opposite to the external gear in position, which can prevent the axial displacement of the external gear. The direction in which the motor protrudes out of the shell is the same as the orientation of the torque output interface and the wire harness interface, facilitating the installation of the driving mechanism at the used position, saving space, and facilitating the connection of the wire harness. The circuit board is arranged in the shell, and the connection line between the circuit board and the motor is the shortest, which can reduce the motor voltage drop and improve the driving efficiency; when multiple brakes are used, the circuit boards of multiple driving mechanisms can be used as redundant backup, and each driving mechanism works independently without mutual interference. The holder is provided with a boss, a protruding column and / or a limiting protrusion, which can limit the axial displacement of the external gear, the pawl and the electromagnet respectively, avoiding the influence of vibration in the use environment on the running stability of the driving mechanism.

[0031] Compared with the prior art, the present application has the following beneficial effects:

[0032] 1. Simplify the whole vehicle braking system architecture;

[0033] 2. Brake electronic control, provide the basis for automatic driving, etc.

[0034] 3. Improve braking efficiency;

[0035] 4. Reduce energy loss caused by vehicle drag, improve vehicle endurance. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 It is the drive mechanism structure diagram of the brake in the application.

[0037] Figure 2 It is the drive mechanism structure diagram of the brake in the application from another angle.

[0038] Figure 3 It is the drive mechanism structure explosion diagram of the brake in the application.

[0039] Figure 4 It is the upper cover structure diagram in the application.

[0040] Figure 5 It is the shell body structure diagram in the application.

[0041] Figure 6 It is the retainer structure diagram in the application.

[0042] Figure 7 It is the retainer structure diagram in the application from another angle.

[0043] Figure 8 It is the circuit board structure diagram in the application.

[0044] Figure 9 It is the transmission structure principle diagram in the application.

[0045] Figure 10 It is the inner gear related structure diagram in the application.

[0046] Figure 11 It is the output shaft structure diagram in the application. DETAILED DESCRIPTION

[0047] As Figures 1 to 3As shown, the drive mechanism 100 of the brake comprises a housing 110, an electronic control circuit board 120, a motor 130, a transmission mechanism 140, an output shaft 160 and a locking mechanism 180. The housing 110 is used to mount the electronic control circuit board 120, the motor 130, the transmission mechanism 140 and the output shaft 160. The electronic control circuit board 120 is used to control the operation of the motor 130. The motor 130 outputs torque through the transmission mechanism 140 and the output shaft 160. The locking mechanism 180 is used to lock and unlock, limiting the rotation of the motor shaft 132, the transmission mechanism 140 and the output shaft 160.

[0048] As shown, Figures 1 to 5 The housing 110 comprises a shell 111 and a retainer 170. The retainer 170 is mounted in the shell 111. The shell 111 comprises a shell body 1111 and an upper cover 1112. The upper cover 1112 is made of a material with good heat transfer performance, preferably a metal material; and more preferably a metal aluminum alloy material. The shell body 1111 is made of plastic. The top of the upper cover 1112 is designed with a reinforcing rib feature to enhance heat dissipation. The inner surface of the upper cover 1112 is provided with a plurality of protrusions 119 for contacting the electronic control circuit board 120. The upper cover 1112 is connected with the shell body 1111 to form a cavity 113. The connection between the upper cover 1112 and the shell body 1111 can be achieved by using conventional mechanical connection methods, such as using fasteners. A sealing ring (not shown in the figure) is provided between the shell body 1111 and the upper cover 1112 to achieve sealing and prevent water leakage. The side of the shell body 1111 opposite to the upper cover 1112 is provided with a torque output interface 114 and a wire harness interface 115. The torque output interface 114 is used for connecting the output shaft 160 with the driven device. The wire harness interface 115 is used for electrically connecting the wire harness (not shown in the figure) with the electronic control circuit board 120. The torque output interface 114 and the wire harness interface 115 are oriented in the same direction. A positioning shaft 116 is provided in the cavity 113. The positioning shaft 116 is fixedly mounted on the shell body 1111. The shell body 1111 is also provided with a mounting groove 118. The mounting groove 118 is used to mount the electromagnet 183.

[0049] As shown, Figure 3 , Figure 6 , Figure 7As shown, the holder 170 comprises a holder body 171 and a plug post 172, and the holder body 171 is connected with the plug post 172. Preferably, the holder body 171 and the plug post 172 are integrally formed. An upper surface 173 of the holder body 171 is used to mount the electronic control circuit board 120. The upper surface 173 of the holder body 171 is provided with two upright posts 174. The two upright posts 174 are distributed along diagonals and are used to be matched with through holes on the electronic control circuit board 120. A lower surface 175 of the holder body 171 is provided with a receiving groove 176 and a pin shaft 177. The receiving groove 176 and the pin shaft 177 both protrude from the lower surface 175 of the holder body 171. A boss 178 is arranged around the pin shaft 177. The boss 178 protrudes from the lower surface 175 of the holder body 171. The lower surface 175 of the holder body 171 is provided with a convex post 179 and a limiting protrusion 191. The convex post 179 is used to limit the axial displacement of a pawl 182. The limiting protrusion 191 is used to limit the axial displacement of an electromagnet 183.

[0050] The holder body 171 is connected with the shell 111 through the plug post 172, and specifically, the holder body 171 is connected with the shell body 1111. The holder body 171 divides the cavity 113 into two parts, one part is used to accommodate the electronic control circuit board 120, and the other part is used to accommodate the transmission mechanism 140. The holder 170 and the shell body 1111 are made of the same material, and preferably, the holder 170 and the shell body 1111 are both made of plastic.

[0051] As shown in Figure 3 , Figure 8 The electronic control circuit board 120 is provided with a through hole 123. The through hole 123 is sleeved on the upright post 174, so as to mount the electronic control circuit board 120 on the holder 170. In order to increase the stability of the electronic control circuit board 120, a screw 125 can also be used to connect the electronic control circuit board 120 with the shell body 1111. As shown in the figure, the electronic control circuit board 120 is located between the holder body 171 and the upper cover 1112.

[0052] As shown in Figures 9 to 11As shown, the motor 130 is a bidirectional rotating motor, which includes a motor shell 131 and a motor shaft 132. The motor shaft 132 extends out of the motor shell 131 from one side of the motor shell 131. A magnetic ring 133 is sleeved on the motor shaft 132. The magnetic ring 133 is used for the electronic control circuit board 120 to sense the state of the motor 130 and detect the angle of rotation of the motor shaft 132. The motor 130 is installed on the shell body 1111. The motor shell 131 protrudes from the shell body 1111. The motor shaft 132 extends into the cavity 113. The magnetic ring 133 is located in the cavity 113. The direction in which the motor 130 protrudes from the shell body 1111 is the same as the directions in which the torque output interface 114 and the wire harness interface 115 face. The motor 130 is controlled to work by the electronic control circuit board 120.

[0053] The transmission mechanism 140 includes a motor gear 141, an intermediate gear 142, an outer gear 145, a sun gear 144, an inner gear 146, and a plurality of planetary gears 147. The motor gear 141 is sleeved on the motor shaft 132 and is driven to rotate by the motor 130. The intermediate gear 142 is installed on the positioning shaft 116 and can freely rotate around the positioning shaft 116. The intermediate gear 142 is engaged with the motor gear 141 and the outer gear 145, and transmits torque to the outer gear 145. The outer gear 146 is connected to the sun gear 144 through an axle 148. The axle 148 is provided with a hole 1481. The pin shaft 177 is inserted into the hole 149 of the axle 148. The outer gear 146 can rotate around the pin shaft 177. The axle 148 is opposite to the boss 178 in position, and can limit the axial movement of the outer gear 145. The sun gear 144 is coaxially installed on the outer gear 145. The sun gear 144 rotates in linkage with the outer gear 145. The three planetary gears 147 are uniformly distributed in the circumferential direction, are rotatably arranged around the sun gear 144, and are engaged with the sun gear 144. The three planetary gears 147 are located in the inner gear 146 and are engaged with the inner gear 146. The inner gear 146 is fixedly arranged on the shell body 1111. The three planetary gears 147 are connected with the output shaft 160. The output shaft 160 includes a disc 161 and a round shaft 162. The round shaft 162 is arranged in the middle of the disc 161. The round shaft 162 is provided with an inner hole spline 163. The three planetary gears 147 are connected with the disc 161 through connecting pins 164, respectively. When the three planetary gears 147 are driven to rotate by the sun gear 144, the output shaft 160 is driven to rotate together. The output shaft 160 is installed at the torque output interface 114, so that the output shaft 160 can be connected with a driven device and output torque. The output shaft 160 is provided with a hollow inner hole spline 163 at the end, and the inner hole spline 163 is used for connecting a brake actuator. The advantage is that the meshing area of the output shaft 160 is increased to improve the output torque and the fatigue resistance of the driving mechanism 100.

[0054] The outer gear 145 has a larger diameter than the motor gear 141. Preferably, the diameters of the motor gear 141, the intermediate gear 142 and the outer gear 145 increase in turn. The difference in diameter of the three gears is determined according to the multiple of the torque amplification required. The planetary gear 147 has a larger diameter than the sun gear 144. Thus, the torque of the motor 130 is amplified by two stages and output.

[0055] The stop mechanism 180 comprises a ratchet wheel 181, a pawl 182 and an electromagnet 183. The ratchet wheel 181 cooperates with the pawl 182. The ratchet wheel 181 is sleeved on the motor shaft 132. The middle part of the pawl 182 is rotatably arranged in the cavity 113 through a middle shaft 184. The middle part of the pawl 182 is mounted on the middle shaft 184 and can rotate around the middle shaft 184. The electromagnet 183 comprises an electromagnet body 185 and a push rod 186. The push rod 186 is connected with the electromagnet body 185 and is driven to extend and retract by the electromagnet body 185. One end of the pawl 182 is connected with the push rod 186, and the other end cooperates with the ratchet wheel 181. The electromagnet 183 is a bidirectional holding electromagnet, which is controlled to work by the electronic control circuit board 120. When the electromagnet 183 is supplied with a forward current, the push rod 186 is elongated and pushes the pawl 182 to rotate around the middle shaft 184, so that the other end of the pawl 182 cooperates with the ratchet wheel 181 and locks the ratchet wheel 181. When the electromagnet 183 is supplied with a reverse current, the push rod 186 is retracted and pulls the pawl 182 to rotate back, so that the pawl 182 unlocks the ratchet wheel 181. When the pawl 182 locks the ratchet wheel 181, the rotation of the motor shaft 132 is limited. When the pawl 182 unlocks the ratchet wheel 181, the motor shaft 132 can rotate. The stop mechanism 180 is used to prevent the motor 130 from rotating during the parking process, to keep the brake in the braking state, and to stabilize the parking.

[0056] During assembly, the motor 130 is mounted on the shell body 1, and the motor shaft 132 extends into the cavity 113. The ratchet wheel 181, the motor gear 141 and the magnetic ring 133 are mounted in turn on the motor shaft 132. The intermediate gear 142 is rotatably mounted on the positioning shaft 116. The intermediate gear 142 is engaged with the motor gear 141 and engaged with the outer gear 145. The outer gear 145 is rotatably mounted on the pin shaft 177. The wheel shaft 148 is located below the boss 178. The outer gear 145 is connected with the sun gear 144 through the wheel shaft 148. The three planetary gears 147 surround the sun gear 144 and are engaged with the sun gear. The three planetary gears 147 are arranged in the inner gear 146. The inner gear 146 is fixedly mounted on the shell body 1111. The three planetary gears 147 are connected with the output shaft 160 through the connecting pin. The electromagnet 183 is arranged in the mounting groove 118. The pawl 182 is mounted on the shell body 1111 through the middle shaft 184. The pawl 182 is located below the protruding column 179. The electromagnet 183 is located below the limiting protrusion 191.

[0057] The drive mechanism shell of the brake and the drive mechanism of the brake in the application are provided with a retainer in the shell, which can divide the cavity of the shell into two parts, facilitating the installation of the circuit board and avoiding the mutual interference of the transmission mechanism and the circuit board. The retainer and the shell are made of the same material, facilitating the connection and fixation of the retainer and the shell, especially when they are both made of plastic, hot riveting can be used for connection, facilitating assembly. The upper cover is made of metal material, and the heat dissipation effect is better. The protrusions provided on the upper cover can contact the circuit board, and the heat of the circuit board is transmitted to the upper cover through the protrusions, and then the upper cover dissipates heat, which can help the circuit board dissipate heat quickly. The retainer is provided with a receiving groove for accommodating the protruding components on the circuit board, making the installation of the circuit board more stable. The boss provided around the pin shaft is opposite to the outer gear in position, which can prevent the axial movement of the outer gear. The direction of the motor protruding from the shell is the same as the direction of the torque output interface and the wire harness interface, facilitating the installation of the drive mechanism at the used position, saving space, and facilitating the connection of the wire harness. The circuit board is arranged in the shell, the connection line of the circuit board and the motor is the shortest, which can reduce the motor voltage drop and improve the driving efficiency; when multiple brakes are used, the circuit boards of multiple drive mechanisms can be used as redundant backup, and each drive mechanism works independently without mutual interference. The retainer is provided with a boss, a column and / or a limiting protrusion, which can limit the axial displacement of the outer gear, the pawl and the electromagnet respectively, avoiding the influence of vibration in use on the running stability of the drive mechanism.

[0058] The above is only the preferred embodiment of the application, and is not used to limit the protection scope of the application. Any modification, equivalent replacement or improvement within the spirit of the application is covered by the claim scope of the application.

Claims

1. A drive mechanism housing for a brake, characterized in that, include: An outer shell that forms a cavity; A retainer, wherein the retainer is disposed within the cavity and is connected to the outer shell; The retainer divides the cavity into two parts; The outer shell includes an outer shell body and a top cover, the top cover being connected to the outer shell body to form the cavity; The retainer and the outer shell body are made of the same material; The outer casing includes a shell and a top cover, the top cover being connected to the outer casing body to form the cavity; the top cover is made of metal; the top cover has protrusions. The cage includes a cage body, on which a receiving groove is provided.

2. The drive mechanism housing of the brake according to claim 1, characterized in that, The top cover is made of metal, and the outer shell is made of plastic.

3. The drive mechanism housing of the brake according to claim 1, characterized in that, The cage body is provided with bosses, protrusions and / or limiting protrusions.

4. The drive mechanism housing of the brake according to claim 3, characterized in that, The cage body has a pin, and a boss is provided around the pin, the boss protruding from the cage body.

5. The drive mechanism housing of the brake according to claim 1, characterized in that, The housing is provided with a torque output interface and a wiring harness interface, and the torque output interface and the wiring harness interface are oriented in the same direction.

6. A drive mechanism for a brake, characterized in that, include: The housing as described in any one of claims 1 to 5; An electric motor, the electric motor including a motor housing and a motor shaft, the motor shaft extending beyond the motor housing; Transmission mechanism; An output shaft, wherein the output shaft is movably disposed; The transmission mechanism is disposed inside the cavity, the motor is disposed outside the cavity, the motor shaft extends into the cavity and is connected to the transmission mechanism, and the motor drives the output shaft to move through the motor shaft and the transmission mechanism; An electronic control circuit board is disposed within the cavity of the housing and is used to control the operation of the motor.

7. The driving mechanism of the brake according to claim 6, characterized in that, The cage includes a cage body and a connector, the cage body being connected to the connector; the cage body is connected to the housing via the connector, the electronic control circuit board is disposed on the cage body, and the electronic control circuit board and the transmission mechanism are respectively disposed on both sides of the cage body.

8. The driving mechanism of the brake according to claim 6, characterized in that, The drive mechanism of the brake further includes a stop mechanism, which is configured to lock the motor shaft, the transmission mechanism, and / or the output shaft in at least one direction and is also unlockable. When the stop mechanism locks the motor shaft, the transmission mechanism, and / or the output shaft, it restricts the rotation of the motor shaft, the transmission mechanism, and / or the output shaft. When unlocked, the motor shaft, the transmission mechanism, and the output shaft are rotatable. The stop mechanism includes a drive device, and the electronic control circuit board controls the operation of the drive device.

9. The drive mechanism of the brake according to claim 8, characterized in that, The stopping mechanism includes a drive device, a ratchet, and a pawl; the ratchet is mounted on the motor shaft, and the ratchet engages with the pawl; the drive device drives the pawl to move.

10. The drive mechanism of the brake according to claim 9, characterized in that, The cage is provided with a protruding post and / or a limiting protrusion; the protruding post is located above the pawl and is used to limit the axial displacement of the pawl; the limiting protrusion is located above the drive device and is used to limit the axial displacement of the drive device.

11. The drive mechanism of the brake according to claim 6, characterized in that, The transmission mechanism includes an external gear, and the cage is provided with a boss located above the external gear to limit the axial displacement of the external gear.

12. The driving mechanism of the brake according to claim 6, characterized in that, The housing is provided with a torque output interface and a wiring harness interface, and the torque output interface and the wiring harness interface face the same direction; the motor protrudes from the housing; the direction in which the motor protrudes from the housing is the same as the direction of the torque output interface and the wiring harness interface.

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