Brake servo motor for AGV

Abstract

The invention belongs to the technical field of motors, and particularly relates to a brake servo motor for an AGV, the brake servo motor comprises a motor body and a brake assembly, the motor body comprises a motor shell, a stator, a motor shaft and a rotor, the stator, the motor shaft and the rotor are coaxially installed in the motor shell, the motor shaft and the rotor are fixedly connected, and end covers are packaged at the front end and the rear end of the motor shell; the brake assembly is installed on an end cover at the rear end of the motor shell. The brake assembly comprises a brake shell, a transmission shaft assembly, a brake pad mounting disc and a brake disc, the transmission shaft assembly is rotatably mounted in the brake shell, the transmission shaft assembly is sleeved with the brake disc and the brake pad mounting disc, and the brake disc is slidably connected with the inner wall of the brake shell. A brake pad is mounted at one end, close to the brake disc, of the brake pad mounting disc; according to the AGV, when the AGV needs to be decelerated or braked, the motor shaft can be quickly braked through the arranged braking assembly, and quick stopping of the AGV is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of motors, and in particular relates to a brake servo motor for an AGV vehicle. Background Art

[0002] AGVs, also known as Automatic Guided Vehicles (AGVs), are widely used in logistics and warehousing to automatically move goods. Logistics warehouses are designed with well-organized movement paths. A central control system controls AGVs to move materials between shelves, using lifting equipment to load and unload materials.

[0003] When AGVs are moving at high speed along their planned paths, they typically need to frequently decelerate, pause, or turn, placing high demands on the performance of their power and braking systems. Traditional motors, however, lack internal braking systems. When the motor stops, the spindle freewheels, requiring a significant amount of time to stop, resulting in wasted time. Even if a brake device were installed outside the motor to form a braking system, this would take up additional space. If the motor needs to stop quickly, this would be very inconvenient, waste significant time, and reduce work efficiency. Therefore, it is necessary to provide a brake servo motor for AGVs. Summary of the Invention

[0004] The purpose of the present invention is to provide a brake servo motor for an AGV trolley, which is used to solve the problem that the motor shaft of the existing AGV trolley cannot stop quickly when adjusting the moving path, resulting in a waste of time.

[0005] In order to achieve the above technical objectives, the technical solutions adopted by the present invention are as follows:

[0006] A brake servo motor for an AGV trolley comprises a motor body and a brake assembly, the motor body comprising a motor housing, a stator coaxially installed in the motor housing, a motor shaft and a mover, the motor shaft and the mover are fixedly connected, the front and rear ends of the motor housing are encapsulated with end covers, and the brake assembly is mounted on the end cover at the rear end of the motor housing; the brake assembly comprises a brake housing, a transmission shaft integration, a brake pad mounting disc and a brake disc, the transmission shaft integration is rotatably installed in the brake housing, the brake disc and brake pad mounting disc are sleeved on the transmission shaft integration, the brake disc is slidably connected to the inner wall of the brake housing, a brake pad is installed at one end of the brake pad mounting disc close to the brake disc, and a linkage shaft is installed at one end of the brake pad mounting disc close to the motor housing, the linkage shaft is transmission-connected to the motor shaft, an actuator is installed in the brake housing, the actuator is used to drive the brake disc to contact the brake pad; the transmission shaft integration can pass through the brake disc and be connected to the linkage shaft.

[0007] In this application, when the AGV needs to be braked, the actuator is started to control the contact between the brake disc and the brake pad, and the rotation of the motor shaft is braked to quickly stop the motor shaft, thereby improving the control efficiency of the motor and improving the efficiency of the material transfer process of the AGV.

[0008] Furthermore, the end cover at the rear end of the motor housing and the rear end wall of the brake housing are provided with heat dissipation openings, and heat dissipation blades are integrally installed on the transmission shaft.

[0009] In this way, the heat generated during the operation of the motor can be dissipated to ensure stable and reliable operation of the motor.

[0010] Furthermore, a connecting ring is installed on the linkage shaft, and the periphery of the connecting ring is connected to a shielding plate through a flexible connecting plate, and the shielding plate is used to shield the heat dissipation port on the end cover at the rear end of the motor housing; the surface of the flexible connecting plate is provided with an electromagnetic shielding layer.

[0011] Under normal circumstances, the brake disc and brake pad are not in contact, and there is also a gap between the shield and the corresponding heat dissipation vent, which does not affect the heat dissipation of the vent. When braking the motor shaft, the brake disc and brake pad come into contact, and the brake pad mounting plate pushes the shield against the heat dissipation vent. When braking the motor shaft, fine dust may be generated on the brake disc or brake pad, potentially affecting the motor. The shield prevents fine dust from entering the motor housing. In addition, the outer diameter of the brake pad mounting plate is larger than that of the brake disc, which also helps to block fine dust.

[0012] Furthermore, the transmission shaft integration includes an installation shaft and a movable shaft, a center hole is opened in the center of the brake disc, and a pin hole is opened in the center of the brake pad mounting disc; an installation space is provided at one end of the brake disc away from the brake pad mounting disc, one end of the movable shaft passes through the center hole, the pin hole is connected to the linkage shaft, and the other end of the movable shaft is provided with a shoulder, an elastic limit part for limiting the shoulder is installed in the installation space, and the movable shaft and the pin hole are connected by a key pin; one end of the installation shaft is coaxially connected to the movable shaft in the installation space; the other end of the installation shaft is connected to the brake housing.

[0013] Furthermore, a limit seat is provided on the inner side of the rear end wall of the brake housing, and a first spring is installed in the limit seat. The first spring is connected to the mounting shaft. The first spring can maintain contact between the mounting shaft and the movable shaft, thereby achieving power transmission from the motor shaft. In this way, regardless of the state of the motor, the rotation of the motor shaft can drive the rotation of the mounting shaft, thereby achieving heat dissipation.

[0014] Furthermore, the actuator includes an electromagnet installed in the brake housing and a permanent magnet cooperating with the electromagnet, and the permanent magnet is fixedly installed on the brake disc.

[0015] Furthermore, a pressure equalizing mechanism is installed on the outer surface of the motor housing; the pressure equalizing mechanism includes a pressure equalizing chamber, distribution plates staggered in the pressure equalizing chamber, and an air inlet hole arranged at the lower part of the pressure equalizing chamber and an air outlet hole at the upper part, and the air outlet hole is connected to the motor housing; a filter is also provided in the pressure equalizing chamber.

[0016] The invention adopting the above technical solution has the following advantages:

[0017] In the present application, in the brake assembly, an actuator is provided to control the contact between the brake disc and the brake pad, brake the rotation of the motor shaft, and quickly stop the motor shaft, thereby improving the control efficiency of the motor and improving the efficiency of the material transfer process of the AGV vehicle; and, when braking, the linkage shaft is pushed by the brake pad mounting disc to block the heat dissipation port on the end cover at the rear end of the motor housing to prevent fine chips that may be generated by the brake from affecting the operation of the motor; after the brake is released, the brake pad mounting disc is separated from the connecting ring, and the heat dissipation port on the end cover at the rear end of the motor housing resumes heat dissipation, and can cooperate with the heat dissipation blades to improve the air flow efficiency in the brake housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention can be further illustrated by the non-limiting examples given in the accompanying drawings;

[0019] Figure 1 This is a schematic diagram of the overall structure of a brake servo motor for an AGV vehicle of the present invention. Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the overall structure of a brake servo motor for an AGV vehicle of the present invention. Figure 2 ;

[0021] Figure 3 This is a right side view of the entire brake servo motor for an AGV vehicle according to the present invention;

[0022] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure along the AA direction;

[0023] Figure 5 is an internal perspective view of the pressure equalizing chamber in the present invention;

[0024] Figure 6 Schematic diagram of the structure of the brake assembly in the present invention;

[0025] Figure 7 It is a right side view of the brake assembly of the present invention;

[0026] Figure 8 for Figure 7 Schematic diagram of the cross-sectional structure along the middle BB direction;

[0027] Figure 9 Schematic diagram of the assembly of the shielding plate and the linkage shaft in the present invention Figure 1 ;

[0028] Figure 10 Schematic diagram of the assembly of the shielding plate and the linkage shaft in the present invention Figure 2 ;

[0029] The main component symbols are described as follows:

[0030] 101. Motor housing; 102. Controller housing; 103. Brake housing; 104. Pressure equalizing chamber; 1041. Air inlet; 1042. Distribution plate; 1043. Filter screen; 1044. Air outlet; 105. Motor shaft; 106. Connecting end; 107. Mounting end; 108. Stator; 109. Mover; 110. Bearing; 111. Rear end wall; 112. Shielding plate; 113. Linkage shaft; 114. Brake pad mounting plate; 115 , brake disc; 116, cooling blade; 117, through hole; 118, cooling vent; 119, movable shaft; 120, brake pad; 121, permanent magnet; 122, electromagnet; 123, mounting shaft; 124, limit seat; 125, first spring; 126, contact surface; 127, second spring; 128, pin hole; 129, limit rod; 130, flexible connecting plate; 131, connecting ring; 132, support bearing; 133, linkage hole. DETAILED DESCRIPTION

[0031] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that in the drawings or descriptions, similar or identical parts are numbered the same. Implementations not shown or described in the drawings are forms known to those of ordinary skill in the art. In addition, directional terms mentioned in the embodiments, such as "upper," "lower," "top," "bottom," "left," "right," "front," and "back," are merely references to the directions in the drawings and are not intended to limit the scope of protection of the present invention.

[0032] like Figures 1 to 10As shown, in one embodiment, a brake servo motor for an AGV vehicle includes a motor body and a brake assembly, the motor body includes a motor housing 101, a stator 108 coaxially installed in the motor housing 101, a motor shaft 105 and a mover 109, the stator 108 and the mover 109 have an electromagnetic coupling effect, the stator 108 is fixed to the inner wall of the motor housing 101 and is installed in a circular array, and a controller housing 102 for encapsulating a controller is installed on the motor housing 101 to realize electrical connection and control of the motor; the electromagnetic coil on the stator is electrically connected to the controller, and the electromagnetic coil drives the mover 109 and the motor shaft 105 to rotate when energized; the motor shaft 105 and the mover 109 are fixedly connected, and the front and rear ends of the motor housing 101 are encapsulated with end covers, and the end cover at the front end is extended with an ear seat to constitute a mounting end 107, and the mounting end 107 is used to install the servo motor on the AGV vehicle; the end cover at the rear end is processed with a connecting threaded hole to constitute a connecting end 106, so as to facilitate connection with the brake assembly through a stud. The brake assembly is mounted on the end cap at the rear end of the motor housing 101, and the two ends of the motor shaft 105 are mounted in the middle of the end caps at both ends of the motor housing 101 through bearings 110. The brake assembly includes a brake housing 103, a transmission shaft assembly, a brake pad mounting disc 114, and a brake disc 115. The transmission shaft assembly is rotatably mounted in the brake housing 103, and the brake disc 115 and the brake pad mounting disc 114 are sleeved on the transmission shaft assembly. The brake disc 115 is slidably connected to the inner wall of the brake housing 103. The brake disc 115 can move axially within the brake housing 103, but cannot rotate. The side wall of the brake housing 103 is provided with a through hole 117, so that the brake housing 103 can be installed and fixed by means of a stud extending into the through hole 117 and threadedly connected to the connecting end 106. A brake pad 120 is mounted on one end of the brake pad mounting disc 114 near the brake disc 115. A linkage shaft 113 is mounted on one end of the brake pad mounting disc 114 near the motor housing 101. The linkage shaft 113 is in transmission connection with the motor shaft 105. An actuator is mounted in the brake housing 103. The actuator is used to drive the brake disc 115 into contact with the brake pad 120. The drive shaft is integrated and can pass through the brake disc 115 to connect with the linkage shaft 113. When the AGV needs to be braked, the actuator is activated to control the brake disc 115 to contact the brake pad 120, brake the rotation of the motor shaft 105, and quickly stop the motor shaft 105, thereby improving the control efficiency of the motor and improving the efficiency of the AGV during material transfer. When the brake needs to be released, the actuator reverses to drive the brake disc 115 out of contact with the brake pad 120, and the motor shaft 105 regains its freedom of rotation. In addition, when the AGV needs to be slowed down, the rotation of the motor shaft 105 can be slowed down by controlling the contact between the brake disc 115 and the brake pad 120. It has a wide range of application scenarios and high flexibility.

[0033] In fact, although the brake disc 115 and the brake pad mounting disc 114 are mounted on the transmission shaft assembly, the brake disc 115 is restricted by the brake housing 103 and cannot rotate; while the brake pad mounting disc 114 and the brake pad 120 are driven to rotate by the transmission shaft assembly.

[0034] For example, a limit frame is installed on the brake housing 103, an axially arranged limit bar is welded inside the limit frame, and a limit groove is provided on the outer surface of the brake disc 115 to engage with the limit bar. Through the cooperation of the limit groove and the limit bar, the brake disc 115 can move left and right but is restricted from rotating.

[0035] For example, the transmission connection between the brake pad mounting plate 114 and the transmission shaft, and the transmission connection between the linkage shaft 113 and the motor shaft 105 can be achieved by a keyway or pin groove connection. During the normal rotation of the motor shaft 105, the brake pad mounting plate 114 and the brake pad 120 also rotate accordingly.

[0036] like Figure 6-Figure 8 As shown, in this embodiment, the actuator includes an electromagnet 122 installed in the brake housing 103, and a permanent magnet 121 cooperating with the electromagnet 122, and the permanent magnet 121 is fixedly mounted on the brake disc 115; by energizing or de-energizing the electromagnet 122, the brake disc 115 can be driven to move by magnetic force, thereby causing the brake disc 115 to contact and release contact with the brake pad 120.

[0037] For example, the actuator may also include an electric push rod installed in the brake housing 103 when actually selected, and a push block is installed at the telescopic end of the electric push rod. The electric push rod can push the push block to abut against the brake disc 115 and promote the movement of the brake disc 115.

[0038] like Figure 8 As shown, in this embodiment, the end cap at the rear end of the motor housing 101 and the rear end wall of the brake housing 103 are provided with heat dissipation vents 118, and heat dissipation blades 116 are integrally mounted on the drive shaft. The end cap at the rear end of the motor housing 101 forms the rear end wall 111, which is machined with a circumferential array of through-holes serving as heat dissipation vents 118. During normal motor operation, the air pressure within the brake housing 103 is lower than that within the motor housing 101 due to the airflow from the heat dissipation blades 116, allowing the heat generated by the motor operation to diffuse from the motor housing 101 through the brake housing 103. This dissipates the heat generated during motor operation, ensuring stable and reliable motor operation.

[0039] In this embodiment, the transmission shaft integration includes an installation shaft 123 and a movable shaft 119, a center hole is opened in the center of the brake disc 115, and a pin hole 128 is opened in the center of the brake pad mounting disc 114. An installation space is provided at the end of the brake disc 115 away from the brake pad mounting disc 114, one end of the movable shaft 119 passes through the center hole and the pin hole 128 and is connected to the linkage shaft 113, and the other end of the movable shaft 119 is provided with a shoulder, and an elastic limiter with a limited constraint shoulder is installed in the installation space; the movable shaft 119 and the pin hole 128 are connected by a key pin to realize power transmission, and it is also convenient for braking the motor shaft 105; one end of the installation shaft 123 is coaxially connected to the movable shaft 119 in the installation space; the other end of the installation shaft 123 is connected to the brake housing 103.

[0040] Exemplarily, the elastic limiting member includes a limiting rod 129 and a second spring 127. The movable shaft 119 is installed in the installation space through the limiting rod 129 and the shaft shoulder. The two ends of the limiting rod 129 abut against the inner wall of the installation space and the shaft shoulder. The second spring 127 is sleeved on the limiting rod 129, which helps to center the movable shaft 119 and reduce its eccentricity during rotation. Of course, in order to better fix the limiting rod 129, each limiting rod 129 can be connected and fixed by a limiting sleeve. With this structural design, when the brake disc 115 moves left and right, the movable shaft 119 still remains connected to the installation shaft 123 and the linkage shaft 113. A limiting seat 124 is provided on the inner side of the rear end wall of the brake housing 103. The limiting seat 124 is installed with a first spring 125, and the first spring 125 is connected to the installation shaft 123. Among them, the first spring 125 can keep the installation shaft 123 in contact with the movable shaft 119, thereby realizing power transmission of the motor shaft 105. In this way, no matter what state the motor is in, the rotation of the motor shaft 105 can drive the installation shaft 123 to rotate, thereby realizing heat dissipation.

[0041] For example, one end of the movable shaft 119 may pass through the linkage shaft 113 and connect to the motor shaft 105. The movable shaft 119 may be configured such that one end passes through the linkage shaft 113 and then connects to the motor shaft 105. The power transmission of the linkage shaft 113 is achieved solely by the motor shaft 105. In this case, the linkage shaft 113 is configured as a hollow tubular structure.

[0042] Exemplarily, the connection between the movable shaft 119 and the mounting shaft 123 can be achieved by abutment or by keyway connection; for example, a conical surface can be set at the connection of the movable shaft 119, and a concave contact surface 126 can be set on the end face of the mounting shaft 123 with the conical surface. In this way, the connection is achieved through the conical surface and the contact surface 126.

[0043] For example, the elastic limiting member may also be an elastic bearing, and the specific implementation may be flexibly selected according to the design strength and structure.

[0044] like Figure 9 、 Figure 10 As shown, in this embodiment, a connecting ring 131 is mounted on the linkage shaft 113. The outer periphery of the connecting ring 131 is connected to a shielding plate 112 via a flexible connecting plate 130. Shielding plate 112 is used to shield the heat dissipation vents 118 on the end cap at the rear end of the motor housing 101. An electromagnetic shielding layer is provided on the surface of the flexible connecting plate 130. When the actuator is an electromagnet 122, the electromagnetic shielding layer can completely prevent the actuator from affecting the motor's operation.

[0045] In fact, the material of the electromagnetic shielding layer can be copper or aluminum; the flexible connecting plate 130 can be selected from rubber or silicone. Among them, under normal circumstances, the brake disc 115 and the brake pad 120 are spaced apart and do not contact each other, and there is also a gap between the shielding plate 112 and the corresponding heat dissipation port 118, which does not affect the heat dissipation of the heat dissipation port 118; when the motor shaft 105 is braked, the brake disc 115 is in contact with the brake pad 120, and the brake pad mounting plate 114 pushes the shielding plate 112 to fit the heat dissipation port 118. When the motor shaft 105 is braked, fine chips may be generated on the brake disc 115 or the brake pad 120, which may affect the motor, and the shielding plate 112 can prevent fine chips from entering the motor housing 101; in addition, the outer diameter of the brake pad mounting plate 114 is larger than the outer diameter of the brake disc 115, which also helps to block fine chips.

[0046] For example, a support bearing 132 is mounted on the end of the linkage shaft 113 near the brake pad mounting plate 114, which is used to rotatably mount the linkage shaft 113 on the side of the brake pad mounting plate 114. A linkage hole 133 is formed in the center of the end of the linkage shaft 113 near the brake pad mounting plate 114, through which the movable shaft 119 is connected to realize power transmission.

[0047] In this embodiment, if Figure 5 As shown, a pressure equalizing mechanism is installed on the outer surface of the motor housing 101; the pressure equalizing mechanism includes a pressure equalizing chamber 104, distribution plates 1042 staggeredly arranged in the pressure equalizing chamber 104, and an air inlet 1041 arranged at the lower part of the pressure equalizing chamber 104 and an air outlet 1044 at the upper part, and the air outlet 1044 is connected to the motor housing 101; a filter screen 1043 is also provided in the pressure equalizing chamber 104.

[0048] In fact, the filter 1043 can be provided with two or even three pieces of different apertures. Air is taken in through the air inlet 1041, passes through the gap between the distribution plates 1042, and then is filtered by the filter 1043 for impurities. It is output from the air outlet 1044 to the motor housing 101, thereby balancing the air pressure inside and outside the motor housing 101 and dissipating heat during the operation of the motor. At the same time, the coordination between the pressure equalizing mechanism and the brake assembly effectively replenishes air to the motor housing 101 and the brake housing 103, which helps to dissipate heat and adapt to the frequent braking scenarios of the AGV, and has high adaptability.

[0049] For example, a heat dissipation pipe row can be installed in the motor housing 101, with both ends of the heat dissipation pipe row connecting the air outlet 1044 and the heat dissipation port 118 on the rear end wall of the motor housing 101; while improving the sealing performance of the motor housing 101, it does not affect the heat dissipation in the brake housing 103.

[0050] This embodiment provides a brake servo motor for an AGV vehicle, in which an actuator is provided to control the brake disc 115 to contact the brake pad 120, brake the rotation of the motor shaft 105, and quickly stop the motor shaft 105, thereby improving the control efficiency of the motor and improving the efficiency of the material transfer process of the AGV vehicle; and, when braking, the linkage shaft 113 is pushed by the brake pad mounting plate 114 to block the heat dissipation port on the end cover at the rear end of the motor housing 101 (i.e., the rear end wall 111), to prevent fine debris that may be generated by the brake from affecting the operation of the motor; after the brake is released, the brake pad mounting plate 114 is separated from the connecting ring 131, and the heat dissipation port on the end cover at the rear end of the motor housing 101 resumes heat dissipation, and can cooperate with the heat dissipation blades 116 to improve the air flow efficiency in the brake housing 103, which is highly practical and has broad market promotion value.

[0051] The above describes in detail the brake servo motor for an AGV provided by the present invention. The description of the specific embodiments is intended only to facilitate understanding of the method and core concepts of the present invention. It should be noted that those skilled in the art may make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications fall within the scope of protection of the claims.

Claims

1. A brake servo motor for an AGV vehicle, comprising a motor body and a brake assembly, wherein the motor body comprises a motor housing (101), a stator (108) coaxially mounted in the motor housing (101), a motor shaft (105) and a mover (109), wherein the motor shaft (105) and the mover (109) are fixedly connected, and the front and rear ends of the motor housing (101) are encapsulated with end covers, and the brake assembly is mounted on the end cover at the rear end of the motor housing (101); characterized in that: The brake assembly comprises a brake housing (103), a transmission shaft assembly, a brake pad mounting disc (114) and a brake disc (115), wherein the transmission shaft assembly is rotatably mounted in the brake housing (103), the brake disc (115) and the brake pad mounting disc (114) are sleeved on the transmission shaft assembly, the brake disc (115) is slidably connected to the inner wall of the brake housing (103), a brake pad (120) is mounted on one end of the brake pad mounting disc (114) close to the brake disc (115), a linkage shaft (113) is mounted on one end of the brake pad mounting disc (114) close to the motor housing (101), the linkage shaft (113) is transmission-connected to the motor shaft (105), an actuator is mounted in the brake housing (103), and the actuator is used to drive the brake disc (115) to contact the brake pad (120); the transmission shaft assembly can pass through the brake disc (115) and be connected to the linkage shaft (113).

2. The brake servo motor for AGV according to claim 1, characterized in that: The end cover at the rear end of the motor housing (101) and the rear end wall of the brake housing (103) are provided with heat dissipation openings (118), and heat dissipation blades (116) are integrally mounted on the transmission shaft.

3. The brake servo motor for AGV according to claim 2, characterized in that: A connecting ring (131) is installed on the linkage shaft (113); the periphery of the connecting ring (131) is connected to a shielding plate (112) via a flexible connecting plate (130); the shielding plate (112) is used to shield the heat dissipation opening (118) on the end cover at the rear end of the motor housing (101); and an electromagnetic shielding layer is provided on the surface of the flexible connecting plate (130).

4. The brake servo motor for AGV according to claim 1, characterized in that: The transmission shaft assembly includes a mounting shaft (123) and a movable shaft (119), a center hole is provided at the center of the brake disc (115), and a pin hole (128) is provided at the center of the brake pad mounting disc (114); an mounting space is provided at one end of the brake disc (115) away from the brake pad mounting disc (114), one end of the movable shaft (119) passes through the center hole and the pin hole (128) and is connected to the linkage shaft (113), the other end of the movable shaft (119) is provided with a shaft shoulder, an elastic limiter for limiting the shaft shoulder is installed in the mounting space, and the movable shaft (119) and the pin hole (128) are connected by a key pin; one end of the mounting shaft (123) is coaxially connected to the movable shaft (119) in the mounting space; the other end of the mounting shaft (123) is connected to the brake housing (103).

5. The brake servo motor for AGV according to claim 4, characterized in that: A limiting seat (124) is provided on the inner side of the rear end wall of the brake housing (103), a first spring (125) is installed in the limiting seat (124), and the first spring (125) is connected to the installation shaft (123).

6. The brake servo motor for AGV according to claim 1, characterized in that: The actuator comprises an electromagnet (122) installed in the brake housing (103), and a permanent magnet (121) cooperating with the electromagnet (122), wherein the permanent magnet (121) is fixedly mounted on the brake disc (115).

7. The brake servo motor for AGV according to claim 1, characterized in that: A pressure equalizing mechanism is installed on the outer surface of the motor housing (101); the pressure equalizing mechanism comprises a pressure equalizing chamber (104), distribution plates (1042) staggeredly arranged in the pressure equalizing chamber (104), and an air inlet (1041) arranged at the lower part of the pressure equalizing chamber (104) and an air outlet (1044) at the upper part, wherein the air outlet (1044) is connected to the motor housing (101); a filter (1043) is also arranged in the pressure equalizing chamber (104).

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