159 results about "Device Motor" patented technology

An automated storage and retrieval system includes an automated storage and retrieval grid and a delivery system. The automated storage and retrieval grid includes a container handling vehicle rail system and a delivery column. The container handling vehicle rail system, which is for guiding a plurality of container handling vehicles, includes a first set of parallel rails arranged in a horizontal plane and extending in a first direction, and a second set of parallel rails arranged in the horizontal plane and extending in a second direction which is orthogonal to the first direction, which first and second sets of rails form a grid pattern in the horizontal plane including a plurality of adjacent container handling vehicle grid cells. Each container handling vehicle grid cell includes a container handling vehicle grid opening defined by a pair of neighboring rails of the first set of rails and a pair of neighboring rails of the second set of rails. The delivery column is adapted for transport of a storage container arranged in a stack of storage containers beneath the container handling vehicle rail system between a container handling vehicle and a delivery port situated at a lower end of the delivery column. The delivery system includes a remotely operated delivery vehicle. The remotely operated delivery vehicle includes a vehicle body, rolling devices connected to the vehicle body, rolling device motors for driving the rolling devices in a horizontal plane, and a power source connected to the rolling device motors. A container carrier is adapted to support the storage container. The delivery vehicle is further adapted to transport the storage container between a delivery port and a second location for handling of the storage container by at least one of a robotic operator and a human operator.

The embodiment of the invention provides a power module, communication equipment, a motor driver, a power assembly and a vehicle, the power module comprises an electronic device, the power module can effectively shorten the length of a heat dissipation path for heat dissipation of the electronic device, the heat dissipation efficiency of the electronic device is improved, and it is guaranteed that heat generated by the electronic device is conducted out in time. The power module comprises a first bottom plate, a first heat dissipation bonding pad and a first electronic device, the second surface is concave inwards to form a first heat dissipation blind groove, the first heat dissipation bonding pad has a first orthographic projection on the first surface, the first heat dissipation blind groove has a second orthographic projection on the first surface, and the first orthographic projection of the first heat dissipation bonding pad is greater than the second orthographic projection of the first heat dissipation blind groove. The first orthographic projection and the second orthographic projection at least partially coincide.

The present invention relates to the technical field of motor diagnosis, and specifically to a motor diagnosis method and apparatus, a motor diagnosis device, and a motor diagnosis system. The motor diagnosis method is applied to the motor diagnosis device in the motor diagnosis system; the motor diagnosis system comprises a motor device, the motor diagnosis device, and an electronic device; the motor device is communicatively connected to the motor diagnosis device; the motor diagnosis device is communicatively connected to the electronic device. The method comprises: receiving operation data and an initial fault identifier that correspond to a motor device and are sent by the motor device; analyzing the initial fault identifier to determine target fault description information corresponding to the motor device; and transmitting the target fault description information and the operation data to an electronic device, so that the electronic device displays the target fault description information and the operation data. The present invention ensures the accuracy of the determined target fault description information corresponding to the motor device, and implements diagnosis of a motor. The present invention solves the problems of high cost and low efficiency of returning a motor device to the factory for maintenance, as well as inability to perform after-sales service.

This utility model discloses a micro-gap pelletizing device for an extrusion granulator. The micro-gap pelletizing device includes: a device support, a device motor, a moving pelletizing blade, and a fixed pelletizing blade. One of the cutting edges of the moving pelletizing blade and the fixed pelletizing blade has a concave V-shaped structure, while the other has a convex V-shaped structure. The cutting edges of the moving and fixed pelletizing blades form a cutting gap that is larger in the middle and smaller at the edges. The beneficial effect of this utility model is that during the pelletizing process, the larger cutting gap in the middle and smaller at the edges causes the material strips at the two sides to converge towards the middle, preventing the material strips from escaping outside the shearing area.

This invention discloses a device, control method, and parameter tuning method for a switchgear motor operating mechanism. The switchgear motor operating mechanism includes a motor, a transmission mechanism, a controller, an inverter unit, a drive unit, a detection unit, a power supply circuit, and a host computer. The controller is a DSP processor that processes data collected by the detection unit, executes a three-loop PI control algorithm, and outputs a PWM signal to the drive unit. The drive unit controls the inverter unit, which converts the DC power from the power supply circuit into three-phase AC power to drive the motor. The host computer is communicatively connected to the controller, monitoring the motor status in real time, adjusting control parameters, and displaying real-time data. This invention, through a three-loop control algorithm and particle swarm optimization, significantly improves the control accuracy, intelligence level, and debugging efficiency of the high-voltage circuit breaker operating mechanism, effectively reducing the workload of debugging personnel and solving problems such as insufficient dynamic adjustment, parameter rigidity, and manual dependence in existing technologies.

A method, performed by a wearable device, of outputting target audio according to one embodiment includes the steps of: receiving a first sensing signal from at least one Hall sensor for sensing the rotation angle of a shaft of a motor of the wearable device; determining a first rotational angular velocity of the shaft of the motor on the basis of the first sensing signal; determining a first sound volume corresponding to the first rotational angular velocity; and outputting first target audio at the first sound volume through a sound output module.

Motor vehicle (2) with a body outer skin (3) and with an air guide device, wherein an air guide element (1) is arranged on the body outer skin (3) of the motor vehicle (2), wherein a film hinge (4) enabling the air guide element (1) to pivot relative to the body outer skin (3) is arranged in the body outer skin (3), and wherein the body outer skin (3) is convexly curved in the area of ​​the film hinge (4), characterized in that the film hinge (4) is formed from two bending lines (7) and has a width that varies along its length due to different distances between the bending lines (7), and that the film hinge (4) is wider in edge areas (5) than in a central section (6).

A motor, a fan assembly, and a heating, ventilation and air conditioning device. The motor comprises a rotor assembly (11), a stator assembly (12), at least one bearing (13), and at least one elastic body (14). The bearing (13) is connected to the rotor assembly (11) and a relative position therebetween is fixed. The elastic body is disposed between the bearing (13) and the stator assembly (12), serving to maintain the bearing (13) at the stator assembly (12) with a certain axial preloading force while reserving a certain compressible height.

Provided in the embodiments of the present application are a power module, a communication device, an electric-motor driver, a power assembly and a vehicle. The power module comprises electronic devices. The power module can effectively shorten the length of a heat dissipation path for the heat dissipation of the electronic devices, such that the heat dissipation efficiency of the electronic devices is improved, thus ensuring that the heat generated by the electronic devices is output in a timely manner. The power module comprises a first substrate, a first heat dissipation pad, and a first electronic device. A second surface is recessed to form a first heat dissipation blind recess. The first heat dissipation pad has a first orthographic projection on a first surface, and the first heat dissipation blind recess has a second orthographic projection on the first surface, wherein the first orthographic projection and the second orthographic projection at least partially overlap.

This invention relates to an electric motor and a cleaning device. The electric motor includes a housing assembly, a fixing assembly, a stator assembly, a rotor assembly, a circuit board, and a Hall effect detection assembly. The fixing assembly is at least partially located within a receiving cavity of the housing assembly; the stator assembly is located within the receiving cavity and fitted over the fixing assembly; the rotor assembly is located outside the stator assembly and connected to the housing assembly to rotate synchronously with it; the circuit board is located within the receiving cavity; the Hall effect detection assembly includes a Hall sensor and a magnetic component, the Hall sensor being disposed on a control board, and the magnetic component being disposed on the housing assembly, the magnetic component, the control board, and the stator assembly being arranged side-by-side along the axial direction of the fixing assembly; the fixing assembly includes a coaxially arranged fixing member and a sleeve, the sleeve being located outside the fixing member, the sleeve having a higher machining precision than the fixing member, and the circuit board being fitted snugly over the sleeve. The higher-precision sleeve limits the circuit board, improving the reliability of the circuit board's fixation, thereby improving the accuracy of the Hall sensor detection.

The utility model relates to the tamping machine technical field, concretely is a kind of road surface tamping equipment for municipal road and bridge construction, including main part, tamping head, motor and noise reduction device, the lower end of main part is provided with tamping head, the upper end of main part is provided with motor, the surface of main part is provided with noise reduction device, the noise reduction device includes locating block and noise reduction cover, the upper end of main part is fixedly connected with locating block, the upper surface of main part is provided with noise reduction cover, the inside of noise reduction cover is provided with soundproof board, the inside of noise reduction cover is provided with limit slot, the side surface of locating block is provided with moving slot. The utility model, by setting noise reduction device, effectively to the noise reduction of motor, played the role of the noise reduction sound insulation to motor, reduced the equipment in use, equipment motor operation, the voice of larger, constructor long-term work in high-noise environment, prone to the situation that constructor hearing damage appears, improved the practicality of equipment.

The utility model belongs to the technical field of luminous lamp boards, and particularly relates to a luminous handheld board which comprises a handle and further comprises a back plate, a battery box, a motor, a half gear, a display board, a connecting groove, a sliding block and a sliding groove which are arranged on one side of the handle, the back plate is fixedly installed on one side of the handle, the battery box is fixedly installed on the surface of the back plate, and the battery box is fixedly installed on the surface of the display board. A half gear is fixedly mounted on the inner surface of the battery box, a motor rotationally connected with the half gear is further fixedly mounted on the inner surface of the battery box, and the half gear is further connected with a connecting groove formed in the surface of the display board in a meshed mode. The connecting groove can be matched with the half gear, the purpose of reciprocating swing of the display board is achieved, then the purpose of striking is achieved, meanwhile, a user does not need to swing arms, meanwhile, consumption of physical strength can be reduced, and use is more convenient and faster.

Motor control device (100), comprising: a computer (110) that calculates friction control information for controlling the friction of a steering device based on vehicle condition information, which includes information about the condition of a vehicle and preset system friction information; and a control unit (120) that either performs friction reduction control to decrease the friction of the steering device or friction increase control to increase the friction of the steering device, based on the friction control information, where the vehicle status information includes information about the vehicle's steering torque.

Motor vehicle with a motor vehicle body (13) which has several vehicle pillars (18), wherein at least one vehicle pillar (18) is covered by a trim element (19), and a pedestrian protection device (80) which has an unfolding mechanism (35, 55, 81) for moving the trim element (19) between a retracted inactive state and an extended active state, wherein the trim element can be moved between the inactive state and the active state by means of an unfolding mechanism with at least one lever element.

The invention relates to an air purification system, an air purification method and device, computer equipment, a storage medium and a computer program product. The system comprises a shell, and a fan, photocatalysis equipment, cleaning equipment, a motor and control equipment which are arranged in the shell, an air inlet and an air outlet are formed in the shell; the control equipment is used for controlling the fan to start, so that the shell sucks air through the air inlet; the photocatalysis equipment is arranged between the fan and the air outlet; the control equipment is also used for controlling the photocatalytic equipment to catalyze and decompose the air; the motor is connected with the photocatalysis equipment and the cleaning equipment; the control equipment is further used for controlling the motor to drive the photocatalysis equipment to move in the first direction and controlling the motor to drive the cleaning equipment to move in the second direction; the first direction and the second direction have reverse components; and the cleaning equipment is arranged on the surface of the photocatalytic equipment and is used for cleaning impurities on the surface of the photocatalytic equipment in the moving process. By adopting the method, the cleaning cost can be reduced.

The utility model provides an equipment motor, and belongs to the technical field of motors. The motor solves the problem that an existing motor can generate large vibration in the follow-up using process. The equipment motor comprises a motor body, a connecting piece is fixedly arranged on the motor body, damping bases are fixedly arranged on the two sides of the connecting piece, first damping assemblies used for damping are fixedly arranged on the two damping bases correspondingly, each first damping assembly is composed of a supporting part, a connecting part and a damping spring, and two damping rods are arranged at the lower end of the connecting part; the damping spring is arranged between the supporting part and the connecting part and used for damping the damping base, a fixing base is fixedly arranged on the connecting part, a second damping assembly is arranged on the fixing base, and the second damping assembly is composed of a supporting plate, a supporting rod and a damping spring. The damping device has the advantage of damping function.

The utility model relates to the technical field of rotors, and discloses a rotor dynamic balance adjusting device motor, which comprises a central shaft, the exterior of the central shaft is cylindrical, a hole is formed in the center of the interior of the central shaft, rotors are arranged at the two ends of the exterior of the central shaft, and a plurality of tooth blocks are arranged outside the rotors. A plurality of holes with different sizes are formed in the outer surface of the rotor, the damping assembly is installed at one end of the outer portion of the center shaft and used for reducing vibration when the rotor moves so as to better adjust balance, and a fixing rod is arranged in the center of the inner portion of the center shaft. Vibration generated in the high-speed running process of the rotor can be effectively absorbed and buffered through cooperative operation of the control connector, the threaded rod, the stop block, the spring, the limiting ring, the fixing rod and other components, vibration energy can be consumed through elastic deformation of the spring, an operator can flexibly adjust the pre-tightening force of the spring according to the actual working condition, and the working efficiency is improved. And the damping effect is accurately controlled.

Motor vehicle (1) with a sensor (3) for detecting the surroundings and a cleaning device (13) associated with the sensor (3) where an actuator (8) is assigned to the sensor (3), wherein the actuator (8) is designed to position the sensor (3) in a working position (3') or to lower it into a body of the vehicle in a rest position (3"), wherein when changing from one position to the other, the sensor (3) sweeps over the cleaning device (13), characterized in that the cleaning device (13) comprises a wiping device (15, 19) and a textile element (17) which can be moistened by a cleaning agent supply device (23), wherein a control device (31) determines a dosage of the cleaning agent supplied to the textile element (17) by the cleaning agent supply device (23), wherein the cleaning device (13) comprises a heating element (18) for heating the textile surface (17) and is constructed such that during the transition from a working position (3') to a rest position (3") the sensor first sweeps over the wiping device (15), then the textile surface (17) and subsequently a further wiping device (19).

Motor vehicle drive device for connecting an internal combustion engine (1) to an electromechanical energy converter (2), wherein this energy converter is configured for starting the internal combustion engine, and with a starter-generator transmission (5) comprising a first drive train (3) which is configured for transmitting a torque from the electromechanical energy converter (2) to the internal combustion engine (1) when starting the internal combustion engine and wherein this transmission (5) has a reduction gear ratio in the direction from the electromechanical energy converter (2) to the internal combustion engine (1) and comprising a second drive train (4) which is configured for transmitting a torque at least temporarily in the direction from the internal combustion engine (1) to the electromechanical energy converter (2) and wherein the second drive train (4) is arranged parallel to the first drive train (3) with respect to the torque transmission between the electromechanical energy converter (2) and the internal combustion engine (1), characterized by the fact that the first drive train (3) has a one-way coupling which is arranged such that a torque can be transmitted from the electromechanical energy converter (2) to the internal combustion engine (1) via this drive train (3) when the internal combustion engine (1) is started and that the second drive train (4) has a speed-sensitive clutch (6) which is open until a first speed threshold is reached, so that in this state no torque can be transferred from the internal combustion engine (1) to the electromechanical energy converter (2) via the second drive train (4) and that the speed-sensitive clutch (6) is closed from the moment this first speed threshold is exceeded and that the one-way clutch makes it possible, during the phases in which the internal combustion engine alone or together with the starter generator provides drive power for the propulsion of the motor vehicle, that the starter generator gearbox is only running freely, meaning no power can be transmitted through it.

The application relates to a shooting adjusting device which comprises a first cavity, two sides of which are respectively provided with mounting plates in the same plane; a second cavity, a first side of which is screw-connected with a first end surface of the first cavity; a motor arranged in the first cavity; a worm and a turbine arranged in the second cavity, one end of the worm being key-connected with an output shaft of the motor; the turbine being sleeved on a rotating shaft, two ends of the rotating shaft extending out of the second cavity through round holes in two end surfaces of the second cavity; two rotating supports located outside the second cavity and fixedly connected with the rotating shafts extending out of the second cavity at one end; and a connecting plate located outside the second cavity and fixedly connected with the other ends of the two rotating supports, used for mounting a shooting device; the motor is used for driving the output shaft to rotate, driving the worm to rotate, driving the turbine to rotate through the worm, driving the rotating shaft to rotate through the turbine, and driving the rotating support to rotate through the rotating shaft, so that the connecting plate rotates outside the second cavity. The device can adjust a shooting angle.

The embodiment of the application discloses a motor starting automation detection device and method. The method is applied to a motor starting automation detection device, and the motor starting automation detection device comprises a control device, a stepping motor, a fan blade fixing device and a rotor connecting device. The method comprises the following steps: when a measured motor is in a power-on state, the measured motor is controlled to be powered off; the fan blade fixing device is controlled to be powered on; the rotor connecting device is controlled to be powered on; the fan blade fixing device is controlled to be powered off, and whether the power-off times of the measured motor are less than a preset power-off times threshold value is judged; if the power-off times are less than the power-off times threshold value, the second rotor is controlled to rotate a target step number which is the same as the power-off times; the rotor connecting device is controlled to be powered off, the measured motor is controlled to be powered on, the power-off times are updated, and the step of controlling the measured motor to be powered off when the measured motor is in the power-on state is executed until the power-off times are greater than the power-off times threshold value.

A container handling vehicle for lifting storage containers from a three-dimensional grid of an underlying storage system includes a first set of wheels and a second set of wheels for moving the vehicle along a rail system of the grid; a vehicle body having a vehicle body footprint defined by horizontal peripheries in a first and a second direction of the vehicle body, the vehicle body comprises a first section having a first footprint and a second section having a second footprint defined by horizontal peripheries in the first and second directions of the first and second sections, respectively; a lifting device for lifting storage containers from the storage system; and a lifting device motor arranged to drive the lifting device when lifting storage containers from the storage system; the first section and the second section are arranged side-by-side such that a total area of the first and second footprints equals a total area of the vehicle body footprint, and a centre point of the first footprint is arranged off centre relative a centre point of the vehicle body footprint; the first section defines a storage container receiving space which is configured to accommodate a storage container; the first section accommodates the lifting device for lifting a storage container from the storage system and the lifting device motor is accommodated in the second section.

The invention provides a motor, a fan assembly and heating and ventilation equipment, the motor comprises a rotor assembly, a stator assembly, at least one bearing and at least one elastic body, the bearing and the rotor assembly are connected and are fixed in relative position, and the elastic body is arranged between the bearing and the stator assembly and used for keeping the bearing on the stator assembly with a certain axial pre-tightening force. And a certain compressible height is reserved. According to the motor, the elastic body is arranged between the bearing and the stator assembly and used for keeping the bearing on the stator assembly with a certain axial pre-tightening force and keeping a certain compressible height. Therefore, when the motor falls off, the elastic body can provide buffering force, the impact force between the bearing and the stator assembly is reduced, and the bearing is prevented from being damaged when the motor falls off. And the weight of the rotor and the rigidity of the elastomer have a certain relationship, so that the elastomer is prevented from being damaged and invalid under the action of alternating impact load in the transportation process of the motor.

The invention discloses a machine vision-assisted cleaning equipment motor gear motion precision detection method, and relates to the technical field of visual detection. The method comprises the following steps: when a first adaptive detection period is triggered, obtaining a plurality of motor operation records; obtaining a plurality of motor predicted rotating speed sequences according to the plurality of operation videos and cleaning modes, and comparing and analyzing the motor predicted rotating speed sequences with the corresponding collection rotating speed sequences to obtain a plurality of collection error curves; acquiring an acquisition correction coefficient set based on the curve, and determining a second adaptive detection period according to the acquisition correction coefficient set; in the second period, the real-time collected rotating speed is corrected, the real-time corrected rotating speed is obtained, and deviation monitoring is conducted on the real-time corrected rotating speed and the motor set rotating speed corresponding to the cleaning task; and when the deviation exceeds a preset precision threshold value, triggering generator abnormity early warning. According to the invention, through visual and sensing data fusion, error dynamic correction and cycle adaptive adjustment, high-reliability and intelligent monitoring and early warning of the motion precision of the motor gear are realized.

The utility model relates to the technical field of coating machines, and discloses an electrostatic coating machine which comprises an equipment frame, a spraying box is arranged at the top of one side of the equipment frame, and an equipment motor, an equipment lead screw, a movable plate, a hydraulic rod and a movable hydraulic machine are connected to one side of the equipment frame in an inserted mode. The spraying device is reasonable in structure, the movable plate drives the spraying plate to slide on the equipment frame, the spraying plate stretches out and draws back on the movable plate, the spraying plate quickly moves on the equipment frame to adjust the position and the height, subsequent fixing of workpieces is facilitated, the hydraulic rod is used for supporting, shaking is avoided when the position and the height of the spraying plate are adjusted, and the spraying device is convenient to use. The spraying base moves in the spraying cover at a constant speed, the electrostatic generator enables generated high voltage and corona to discharge, then charges are generated near the spraying gun for spraying, paint is sucked to a workpiece, the uniformity and quality of a sprayed coating are guaranteed, the top heating plate and the curing heating plate heat the interior of the curing box, and the spraying effect is improved. And the molten powder is tightly attached to the surface of the sprayed workpiece.

The present application relates to the technical field of air compressors, and specifically discloses a two-stage air-floating air compressor performance test bench for fuel cells, comprising: a primary pipeline connected to the air inlet end of the air compressor to be tested, a secondary pipeline connected to the exhaust end of the air compressor to be tested, an intercooler, a motor controller, a first water cooling system, a second water cooling system, a third water cooling system and a preset controller; one side of the first water cooling system is connected to the cooling water inlet joint of the air compressor to be tested, and one side is connected to the cooling water drain joint of the air compressor to be tested, one side of the second water cooling system is connected to the cooling water inlet joint of the intercooler, and one side is connected to the cooling water drain joint of the intercooler, and one side of the third water cooling system is connected to the cooling water inlet joint of the motor controller, and one side is connected to the cooling water drain joint of the motor controller; the first water cooling system, the second water cooling system and the third water cooling system are all connected to the preset controller.

The utility model discloses a motor controller and an electronic device, the motor controller comprises a housing, a membrane capacitor module, a silicon carbide module, a circuit board, an input row group and an output row group, and the housing is provided with an accommodating cavity; the membrane capacitor module is accommodated in the accommodating cavity; the silicon carbide module is contained in the containing cavity and located on one side of the film capacitor module. The circuit board is accommodated in the accommodating cavity, is respectively connected with the film capacitor module and the silicon carbide module, and is used for controlling current conversion between the film capacitor module and the silicon carbide module; the input row group is connected to the input end of the membrane capacitor module and is used for being connected with an external power supply; one end of the output row group is connected to the silicon carbide module, and the other end of the output row group is connected with a motor. Therefore, by adopting the motor controller provided by the invention, the film capacitor module, the silicon carbide module and the circuit board can be assembled and installed, so that the situation that each module and the circuit board are independently and separately arranged to occupy too much space is avoided, and the motor controller is relatively convenient to use.

An automated warehouse control and management system and method are disclosed, comprising a ruggedized computer, the output of which is connected to a shuttle motor driver, a lifting device driver, and a lifting motor contactor of a lifting mechanism, respectively. The outputs of the shuttle motor driver, the lifting device driver, and the lifting motor contactor are connected to the shuttle motor, the lifting device motor, and the lifting motor, respectively. Photoelectric encoders are installed on both the shuttle motor and the lifting device motor. The photoelectric encoders transmit the operating parameters of the motors to the shuttle motor driver and the lifting device driver, respectively, and the drivers feed the parameters back to the ruggedized computer. This invention addresses the challenges of shipboard environments with their inherent tilting and swaying characteristics and complex electromagnetic environments, which place high demands on the speed and position control of the moving equipment. The invention ensures the system has excellent tracking accuracy and achieves stable control of the moving equipment.

The utility model belongs to the technical field of automobile glass supports, and particularly relates to an angle adjusting mechanism and a front windshield installation support, the angle adjusting mechanism comprises a front windshield installation support main body, and the bottom of the front windshield installation support main body is provided with an angle adjusting assembly; the angle adjusting assembly comprises a device motor, the output end of the device motor is fixedly connected with a motor rotating shaft, the outer wall of the motor rotating shaft is connected with a transmission belt in a clamped mode, the side of the transmission belt is connected with a transmission rotating shaft in a clamped mode, and one end of the transmission rotating shaft is fixedly connected with a worm body. The bottom of the worm body is meshed with a worm wheel body, the side of the worm wheel body is fixedly connected with a rotating shaft, and the bottom of the rotating shaft is provided with a suction cup body; according to the utility model, the stability of angle adjustment can be conveniently ensured, light can be conveniently supplemented for the device, and the installation accuracy is ensured.

The application discloses a kind of passenger conveying device drive device manufacturing tools, including first body and second body;The first body is rectangular flat body, and the second body is fixed with the first body in the height direction, and after being fixed, the first body and the second body are T-shaped;The outer surface of the first body in the height direction is the first reference surface, and the lower surface of the second body is the first measurement surface, the first measurement surface is parallel to the first reference surface, and the first measurement surface and the first reference surface have the first size, the first size is used to measure the parallelism of drive device motor pulley end face and drive pulley;The second body also has a step surface, the step surface of the second body is parallel to the first measurement surface, and the step surface of the second body and the first measurement surface have the second size, and the second size is used to measure the bolt head height of brake release device on the drive device.