CN210101960U - Electric steering driving device and electric steering system of marine propeller - Google Patents

Abstract

The utility model belongs to the technical field of boat steering, in particular to an electric steering driving device and an electric steering system of a marine propeller, wherein the electric steering driving device comprises a motor, a lead screw nut and a supporting sliding sleeve, the lead screw and the lead screw nut are both arranged in a steering connecting pipe of the marine propeller, and the lead screw, the lead screw nut and the supporting sliding sleeve are sequentially sleeved; the first end of the screw rod is connected with an output shaft of the motor, the screw rod nut is in threaded connection with the second end of the screw rod, and the support sliding sleeve is fixed in the steering connecting pipe and is in sliding connection with the screw rod nut; the screw rod nut located at the second end of the screw rod moves linearly along the screw rod, and the second end of the screw rod is indirectly supported through the support sliding sleeve. The utility model provides an electricity turns to drive arrangement, the first end and the motor of lead screw are connected, and the second end is connected with screw-nut, reduces through increasing the support sliding sleeve and beats.

Description

Electric steering driving device and electric steering system of marine propeller

Technical Field

The utility model belongs to the technical field of the ships and light boats turn to, especially, relate to an electricity turns to drive arrangement and marine propeller electric steering system.

Background

The boat generates propelling power through the propeller, and the driving direction of the boat needs to be adjusted through steering control in the driving process of the boat. The common marine propellers comprise an outboard motor, an inboard motor and a pod type propeller, and the outboard motor, the inboard motor and the pod type propeller are driven by an engine or a motor to rotate to generate propulsive force, so that a steering system can be arranged on the marine propeller to adjust the orientation of the propeller to change the running direction of the boat and divide the running direction according to a steering actuating mechanism, and the existing marine propeller steering systems comprise three steering systems, namely mechanical wire pulling steering, hydraulic steering and electric driving steering. Because the steering system needs to be capable of providing large steering torque, a screw nut pair is used in the steering system; in order to ensure the normal operation of a steering system, improve the steering control precision and reduce the noise and vibration during steering, the bounce generated in the rotation process of the screw rod needs to be reduced so that the screw rod nut pair can stably operate.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: provided are an electric steering drive device and an electric steering system for a marine propeller, which are used for reducing the jumping of a screw rod.

In order to solve the above technical problem, on the one hand, an embodiment of the present invention provides an electric steering driving device, which is fixed on a steering connection pipe arranged on a marine propeller along a horizontal direction, and is connected with a connecting rod for driving the marine propeller to rotate in a vertical direction relative to the steering connection pipe; the marine propeller comprises a motor, a screw rod nut and a supporting sliding sleeve, wherein the screw rod and the screw rod nut are arranged in a steering connecting pipe of the marine propeller, and the screw rod, the screw rod nut and the supporting sliding sleeve are sequentially sleeved; the first end of the screw rod is connected with an output shaft of the motor, the screw rod nut is in threaded connection with the second end of the screw rod, and the support sliding sleeve is fixed in the steering connecting pipe and is in sliding connection with the screw rod nut; the screw rod nut located at the second end of the screw rod moves linearly along the screw rod, and the second end of the screw rod is indirectly supported through the support sliding sleeve.

Optionally, the electric steering driving device is fixed on a steering connecting pipe arranged on the marine propeller along the horizontal direction, and the electric steering driving device is connected with the connecting rod to drive the marine propeller to rotate in the vertical direction relative to the steering connecting pipe;

the electric steering driving device further comprises a push rod, the push rod is arranged in the steering connecting pipe in parallel to the lead screw, the push rod is fixedly connected with the lead screw nut, the supporting sliding sleeve is connected with the push rod in a sliding mode, and the push rod and the lead screw nut move linearly together along the lead screw.

Optionally, the push rod is a hollow push rod, and the screw rod nut, the push rod and the support sliding sleeve are sequentially sleeved outside the screw rod from inside to outside.

Optionally, the axes of the screw rod, the motor output shaft and the steering connecting pipe in the horizontal direction are parallel to each other.

Optionally, the electric steering driving device further comprises a joint for connecting the motor and the steering connecting pipe, the joint is in a horn cylinder shape, one end with a larger outer diameter of the joint is fixedly connected with the housing of the motor, and one end with a smaller outer diameter of the joint is in threaded connection with the outside of one end of the steering connecting pipe; the screw rod penetrates through the joint to be connected with the motor.

Optionally, be provided with first bearing and movable seal spare in the hole of joint, the outer lane of first bearing with the interior pore wall interference fit of joint, the inner circle cover of first bearing is established on the lead screw, the outer lane of movable seal spare with the interior pore wall interference fit of joint, the inner circle cover of movable seal spare is established on the lead screw, first bearing is located the rear of movable seal spare, movable seal spare is used for sealing the motor.

Optionally, the output shaft of the motor and the screw rod are coaxially arranged, and the screw rod is connected with the output shaft of the motor through a pin shaft or a coupling.

Optionally, the motor is an external rotor motor, and includes a stator and a rotor, the rotor is connected to the lead screw through an output shaft of the motor, a through hole is formed in the center of the stator, and the first end of the lead screw extends and penetrates through the through hole to be connected to the second bearing.

On the other hand, the embodiment of the utility model provides a still provide a marine propeller electric power steering system, it includes foretell electric steering drive.

The embodiment of the utility model provides an electric steering drive arrangement and marine propeller electric steering system, lead screw, screw-nut all set up in the steering linkage pipe of marine propeller, lead screw, screw-nut, support sliding sleeve cover in proper order and establish, the first end of lead screw and the output shaft of motor, screw-nut threaded connection is at the second end of lead screw, the support sliding sleeve is fixed in the steering linkage pipe and with screw-nut sliding connection; the screw rod nut moves linearly along the screw rod and indirectly supports the second end of the screw rod through the support sliding sleeve. The whole electric steering driving device is fixed on the steering connecting pipe to preliminarily limit the jumping of the screw rod. The first end and the motor of lead screw are connected, and the second end is connected with screw-nut, reduce through increasing the support sliding sleeve and beat. In addition, the lead screw may be integrated with the output shaft of the motor to reduce run-out. Or the output shaft of the first motor is a hollow shaft, and the length of the long screw rod is prolonged to enable the long screw rod to be inserted into the output shaft of the motor, so that the jumping of the screw rod is greatly reduced, the interchangeability of the system is increased, and the production steps are simplified.

Drawings

Fig. 1 is a schematic connection diagram (a perspective view) between an electric steering driving device and an outboard motor of an electric power steering system for an outboard motor according to an embodiment of the present invention;

fig. 2 is a schematic connection diagram (a cross-sectional view) between an electric steering driving device and an outboard motor of an electric power steering system for an outboard motor according to an embodiment of the present invention;

fig. 3 is a perspective view of an electric steering driving device of an outboard motor electric steering system according to an embodiment of the present invention;

fig. 4 is an exploded view of an electric steering driving device of an electric steering system for an outboard motor according to an embodiment of the present invention;

fig. 5 is a cross-sectional view of an electric steering driving device of an outboard motor electric steering system according to an embodiment of the present invention;

fig. 6 is a cross-sectional view (enlarged) showing a joint position of an electric steering drive device of an outboard motor electric power steering system according to an embodiment of the present invention.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1 to 6, an embodiment of the present invention provides a marine propeller electric power steering system including an electric power steering driving device 30 and a steering device.

The marine propulsor 20 includes a stationary assembly, a link 202, and a rotating assembly 203. The fixing assembly includes a steering connection pipe 201 disposed in a horizontal direction.

The electric steering driving device 30 is fixed to a steering connection pipe 201 arranged on the marine propeller 20 in a horizontal direction, and the electric steering driving device 30 is connected to a link 202 for driving the marine propeller 20 to rotate in a vertical direction with respect to the steering connection pipe 201.

The electric steering driving device 30 comprises a motor 301, a screw rod 302, a screw rod nut 303 and a supporting sliding sleeve 312, wherein the screw rod 302 and the screw rod nut 303 are both arranged in a steering connecting pipe 201 of the marine propeller 20, and the screw rod 302, the screw rod nut 303 and the supporting sliding sleeve 312 are sequentially sleeved; a first end of the screw 302 is connected with an output shaft of the motor 301, the screw nut 303 is in threaded connection with a second end of the screw 302, and the support sliding sleeve 312 is fixed in the steering connecting pipe 201 and is in sliding connection with the screw nut 303; the lead screw nut 303 located at the second end of the lead screw 302 moves linearly along the lead screw 302, and indirectly supports the second end of the lead screw 302 through the support sliding sleeve 312.

The lead screw nut 303 is screwed outside the lead screw 302, and the lead screw nut 303 is connected with the connecting rod 202.

The electric steering driving apparatus 30 further includes a motor rotation number detecting element, a controller, and a motor driver 320. The motor rotation number detecting element and the motor driver 320 are electrically connected to the controller, respectively.

The motor rotation number detecting element may be a hall sensor or an encoder for detecting the rotation number and the rotation direction of the motor 301.

The controller is used for controlling the motor driver 320 to drive the motor 301 to rotate according to a received steering signal from a steering device of an electric steering system of the marine propeller, and the motor 301 rotates to drive the screw rod 302 to rotate so as to enable the screw rod nut 303 to linearly move along the screw rod 302 and drive the connecting rod 202 to move; the motor rotation number detecting element is used for detecting the rotation number of the motor 301 and feeding back the rotation number to the controller, and the controller controls the operation of the motor 301 accordingly so that the lead screw nut 303 is located in the range between the first position and the second position on the lead screw 302.

The controller controls the motor 301 to stop operating if it is detected that the feed screw nut 303 is operated to the first position or the second position. The controller also calculates the number of rotation turns of the motor in sampling time according to the number of rotation turns of the motor sent by the motor rotation turn number detection element, and if the number of rotation turns of the motor in sampling time is 0 and the lead screw nut 303 is not located at the first position or the second position, the controller controls the motor 301 to stop running.

As shown in fig. 1, the stationary assembly further includes a clamp 204, and the rotating assembly 203 includes a propeller housing and a propeller 2034. A power device 2035 is arranged in the propeller shell. The power device 2035 is connected with the propeller 2034 and drives the propeller 2034 to rotate; the first end of the link 202 is connected to the propeller housing, the electric steering driving device 30 drives the link 202 to rotate, and the link 202 drives the rotating assembly 203 to rotate to adjust the orientation of the propeller 2034 in the horizontal direction, so as to adjust the propelling direction of the marine propeller.

The power unit 2035 may be mounted on the upper and lower portions of the propeller housing. When the propeller is installed on the upper portion of the propeller housing, a vertical transmission shaft (a propeller main shaft 2032 described below) is provided between the power unit 2035 and the propeller 2034 and then connected to the propeller 2034; when mounted on the lower portion of the propeller housing, the power unit 2035 is coaxially connected to the propeller 2034.

In one embodiment, the power device 2035 is mounted on the upper portion of a propeller housing, the propeller housing includes an upper housing 2031 and a spindle support housing 2033, the upper housing 2031 is fixed above the spindle support housing 2033, the power device 2035 is mounted in the upper housing 2031, the propeller 2034 is mounted on the rear side of the lower end of the spindle support housing 2033, the upper end of the propeller spindle 2032 is connected to the output shaft of the power device 2035 through a gear box assembly, the lower end of the propeller spindle 2032 is connected to the propeller 2034 through two orthogonally engaged bevel gears, a vertical propeller spindle 2032 is disposed between the power device 2035 and the propeller 2034, that is, the power device 2035 is connected to the propeller 2034 through the propeller spindle 2032. Thus, the propeller 2034 can be rotated by the rotation of the power unit 2035 to provide propulsive power to the boat. The marine propeller 20 is suspended from the rear of the hull 10 by a clamp 204, the steering connection pipe 201 is horizontally disposed on the clamp 204, the marine propeller electric power steering system is fixed in the steering connection pipe 201, and the electric power steering driving device 30 is fixedly connected to the steering connection pipe 201. One end of the link 202 is hinged to the upper part of the pusher 203 (e.g., by bolts or nuts). Preferably, one end of the link 202 is hinged to the bottom surface of the upper housing 2031.

The power device 2035 may be an electric motor.

In an embodiment, the electric steering driving device 30 further includes a push rod 304, the push rod 304 is disposed in the steering connecting pipe 201 parallel to the lead screw 302, the push rod 304 is fixedly connected to the lead screw nut 303, the lead screw nut 303 is connected to the connecting rod 202 through the push rod 304, the support sliding sleeve 312 is slidably connected to the push rod 304, and the push rod 304 and the lead screw nut 303 move linearly along the lead screw 302 together, so as to drive the connecting rod 202 to move.

The push rod 304 is in sliding contact with the inner wall of the support sliding sleeve 312, and the axis of the screw rod 302, the output shaft of the motor 301 and the axis of the steering connecting pipe 201 in the horizontal direction are parallel to each other.

The lead screw 302 is parallel to the steering connection pipe 201. The screw rod 302 is parallel to the steering connecting pipe 201, and the first condition is that the screw rod 302 is arranged outside the steering connecting pipe 201 and is parallel to and spaced from the steering connecting pipe 201; secondly, the screw 302 is disposed inside the steering connection pipe 201 and is coaxial with the steering connection pipe 201. In order to reduce the size of the electric power steering system for the marine propeller, it is preferable that the screw shaft 302 be disposed inside the steering connection pipe 201.

The outer wall of the screw rod 302 uses the inner wall of the push rod 304 as an inner guide, and the outer wall of the push rod 304 is in contact with the support sliding sleeve 312 to form an outer guide, so that compared with the existing steering structure, the steering structure has better coaxiality, noise is reduced, and the service life is longer.

Preferably, the controller and motor driver 30, the motor 301, the position switch, the lead screw 302 and the lead screw nut 303 are sequentially arranged along the axial direction of the steering connecting pipe 201 from left to right; alternatively, the motor 301, the controller, the motor driver 320, the position switch, the lead screw 302 and the lead screw nut 303 are sequentially arranged along the axial direction of the steering connection pipe 201.

Between the first position and the second position there is a third position in which the angle between the vertical mid-plane of the marine propeller 20 and the steering connection 201 is 90 °. The electric steering drive device 30 further includes a position switch for detecting the third position. The position switch for detecting the third position may be an angle sensor for detecting the rotation angle of the marine propeller 20, or may be a photoelectric sensor or an ultrasonic sensor for detecting the neutral position of the marine propeller 20.

The stroke range of the push rod 304 is the same as that of the lead screw nut 303, the position of the lead screw nut 303 on the lead screw 302 corresponds to the rotation stroke of the steering device one by one, and the angular position of the steering device corresponds to the only position of the lead screw nut 303 on the lead screw 302.

The motor driver 320 is installed at the rear end of the motor 301. Preferably, the controller and motor driver 320 are integrated within the housing of the motor 301.

The casing of the motor 301 includes a front casing 3011 and a rear casing 3012, the stator assembly and the rotor assembly of the motor 301 are disposed in the front casing 3011, the front casing 3011 includes a cylindrical portion 30111 and a radial extension portion 30112 located behind the stator assembly and the rotor assembly, the rear casing 3012 is fixed at the rear end of the front casing 3011 (the cylindrical portion 30111), a cavity is formed among the cylindrical portion 30111, the radial extension portion 30112 and the rear casing 3012, and the motor driver 320 is installed behind the radial extension portion 3012 and is accommodated in the cavity.

The rear casing 3012 is provided with a power line connector 305 and a signal line connector 306, the motor driver 320 is electrically connected to a power source through the power line connector 305 to supply power to the motor 301 through the power source, and the controller is in communication connection with the steering device 40 through the signal line connector 306.

In one embodiment, the front of the motor 301 forms a chamber in which the motor driver 320 and controller are mounted. At this time, the power line connector 305 and the signal line connector 306 are preferably provided on the front case 3011 of the motor 301.

The rear shell 3012 is connected with the front shell 3011 in a sealing manner through a static sealing element, the front shell 3011 is also connected with a joint 307 described below in a sealing manner, a movable sealing element is arranged between the joint 307 and the screw rod 302, and a sealed waterproof chamber is formed among the rear shell 3012, the front shell 3011 and the movable sealing element, so that the motor 301, the controller, the motor driver 320 and the position switch are arranged in a sealed waterproof environment to be protected.

The power cord connector 305 is electrically connected to a power source through a power cord. The signal line connector 306 is in communication connection with the steering device through a signal line, and the controller is in wired communication with the steering device.

The electric steering driving device 30 further comprises a joint 307 for connecting the motor 301 with the steering connecting pipe 201, the lead screw 302 penetrates through the joint 307 to be connected with the motor 301, the joint 307 is in a horn cylinder shape, one end of the joint 307 with a larger outer diameter is fixedly connected with the shell of the motor 301 through a screw, and one end of the joint 307 with a smaller outer diameter is in threaded connection with the outside of one end of the steering connecting pipe 201. Specifically, an inner thread is disposed at the end of the joint 307 with the smaller outer diameter, and an outer thread matched with the inner thread disposed at the end of the steering connection pipe 201 with the smaller outer diameter is disposed at the outer portion of the end.

The joint 307 is in threaded connection with the steering connecting pipe 201, a mounting tool is not needed, the mounting steps are greatly simplified, and the plug and play mode is realized.

A first bearing 308 and a movable sealing element 309 are arranged in an inner hole of the joint 307, an outer ring of the first bearing 308 is in interference fit with an inner hole wall of the joint 307, an inner ring of the first bearing 308 is sleeved on the screw rod 302, an outer ring of the movable sealing element 309 is in interference fit with the inner hole wall of the joint 307, an inner ring of the movable sealing element 309 is sleeved on the screw rod 302, the first bearing 308 is located behind the movable sealing element 309, and the movable sealing element 309 is used for sealing the motor 301.

Because the first motor driver 320 and the controller are integrated in the housing of the first motor 301, the first motor 301 is sealed by the dynamic seal 309, and a waterproof effect can be achieved to protect the first motor 301 and other electronic components in the housing.

In one embodiment, the first bearing 308 is a double row angular contact bearing, and the dynamic seal 309 is an oil seal.

In other embodiments, the double row angular contact bearing may be replaced by two angular contact bearings or other bearings or combinations of bearings capable of withstanding bi-directional axial forces.

The electric steering driving device 30 further includes a position switch for detecting whether the lead screw nut 303 is located at the first position and/or the second position, and the controller controls the operation of the motor 301 according to a switching signal sent by the position switch.

One end of the push rod 304 is inserted in the steering connecting pipe 201 in a sliding manner and sleeved at the other end of the screw rod 302, and the screw rod nut 303 is fixed on the inner wall of the end part of the push rod 304 close to the motor 301. The position switch is a hall switch, the hall switch comprises a magnetic sensing element 310 and a magnetic element 311, the magnetic element 311 is fixed on the inner wall of the end part of the push rod 304 close to the motor 301 and is positioned behind the screw rod nut 303, and the magnetic element 311 moves along with the push rod 304. The magnetic element 311 is, for example, a magnet.

The position switch can also be a reed switch, a photoelectric switch, an ultrasonic switch or other non-contact position switches. These switches need to be mounted in the fitting 307 against the moving lead screw nut 303 in order to detect movement of the lead screw nut 303 or movement of the push rod 304.

Because the distance between the magnetic element 311 and the magnetic sensing element 310 is required, the magnetic element 311 must be installed at the initial position (front end) of the push rod 304 for detection. The signal line of the position switch needs to be connected with the controller, and the position switch sends a switch signal to the controller for controlling the start and stop of the motor 301 according to the switch signal.

The position switch is arranged in the joint 307, the position switch is electrically connected with the controller through a cable, a wire slot for accommodating the cable is arranged on the front shell 3011, and the cable is electrically connected with the controller after passing through the wire slot.

Since the position switch detects the movement of the lead screw nut 303, the position switch must be disposed on the side close to the lead screw nut 303 with respect to the motor 301 without being blocked in the middle.

The controller and motor driver 320 may be disposed on a side of the motor 301 adjacent to the lead screw nut 303, or may be disposed on the opposite side of the motor 301.

To facilitate the placement of the power line connection on the motor 301, it is preferred that the motor 301 be located on a side away from the lead screw nut 303, so that the cable between the position switch and the motor driver 310 must pass through the motor 301.

In order to ensure that the motor 301 with the same volume can generate larger torque, the motor 301 is generally configured as an external rotor motor, and includes a stator and a rotor, the rotor is connected with the lead screw 302 through the output shaft 3013 of the motor 301, the stator is centrally provided with a through hole, and a first end of the lead screw 302 extends and penetrates through the through hole to be connected with a second bearing. A case is provided outside the motor 301 or a duct is provided in the center of the stator of the motor 301, and a cable for electrical connection can be attached.

If the lead screw 302 does not pass through the motor 301, only the first bearing 308 is needed. If the lead screw 302 extends through the motor 301, it is necessary to connect with the second bearing after passing through the motor 301. The second bearing does not need to bear axial force, and only needs to bear radial force, so that the second bearing can adopt a common roller bearing.

When the distance between the magnetic element 311 and the magnetic induction element 310 is close to a certain threshold value, the state of the position switch is changed, the controller controls the motor 301 to stop running, records the number of motor rotation turns recorded by the motor rotation turn number detection element (an encoder or a Hall sensor) after the motor 301 stops rotating, and calculates the current position of the screw nut 303 according to the next rotation direction and number of the motor 301 by taking the number as a reference value.

After the electric power steering system is powered on, the push rod 304 moves towards the motor 301, and when the position switch built in the joint 307 detects that the strength of the magnet 311 mounted on the push rod 304 reaches a certain threshold value in a non-contact detection mode, the controller records the current position as an initialization position. A hall sensor or an encoder is installed in the motor driver 320 for detecting the rotation direction and the number of turns of the motor. The controller stores the theoretical maximum rotation turns of the motor 301, and according to the stroke length L of the screw rod 302, assuming that the feed of the screw rod 302 to the push rod is L per turn of the motor 301, the theoretical maximum rotation turns of the motor 301 which can rotate from the zero point is L/L, the controller acquires the number of positive and negative rotation turns of the motor 301 through the position sensor, and limits the increment of the actual rotation turns relative to the rotation turns of the initialization position not to exceed delta n.

In an embodiment, the output shaft of the motor 301 is coaxially disposed with the lead screw 302, and the output shaft 3013 of the motor 301 is integrally disposed with the lead screw 302. This has the advantage that the output shaft 3013 of the motor 301 is integrally connected with the lead screw 302, so that the whole has higher rigidity and coaxiality, and the radial run-out of the lead screw 302 can be reduced when the motor 301 rotates.

In one embodiment, the link 202 is L-shaped, the link 202 includes a vertical rod section 2021 and a horizontal rod section 2022, one end of the horizontal rod section 2022 is connected to the upper end of the vertical rod section 2021, the other end of the horizontal rod section 2022 is hinged to the rotating assembly 203, and the electric steering driving device 30 is rotatably connected to the lower end of the vertical rod section 2021.

In a specific embodiment, the other end of the horizontal rod section 2022 is hinged to the upper part of the thruster housing, and the lead screw nut 303 is connected to the lower end of the vertical rod section 2021 through the push rod 304. The other end of the push rod 304 is provided with a through hole, the lower end of the vertical rod section 2021 is provided with an external thread, and the lower end of the vertical rod section 2021 penetrates through the through hole downwards and is in threaded connection with a nut. In this way, the articulation of the link 202 with the push rod 304 is achieved. In particular, the horizontal bar section 2022 is hinged on the underside of the upper shell 2031 of the thruster housing. The axis of rotation of the horizontal rod section 2022 is spaced parallel to the central axis of the propeller shaft 2032. To ensure flexible rotation of the link 202.

In other embodiments, the first end of the connecting rod connected with the motor driving device is vertically consistent with the second end of the connecting rod connected with the rotating assembly, and the connecting rod can also be a straight rod; in other embodiments, the link may be a rod of other shapes having at least one horizontal rod segment.

When the push rod 304 moves back and forth along the lead screw 302, the push rod can drive the connecting rod 202 to move through the principle of connecting rod crank, and the connecting rod 202 is hinged with the rotating component 203, so that the rotating component 203 can be directly or indirectly pushed to rotate horizontally by an angle. The stroke range of the push rod 304 and the rotation stroke of the steering device are mapped on one ship propeller 20, the mapping relation can be linear or nonlinear, but the angle signals input by the steering device and the positions of the push rod 304 can be in one-to-one correspondence, so that the purpose of steering adjustment is achieved. The L-shaped link 202 may rotate the upper housing 2031, the main shaft support housing 2033, and the propeller 2034 of the rotating assembly 203 together, thereby changing the orientation of the marine propeller 20.

In another embodiment, the output shaft 3013 of the motor 301 is coaxially disposed with the lead screw 302, and the output shaft 3013 of the motor 301 and the lead screw 302 are separately disposed.

In other embodiments, the motor 301 and the lead screw 302 may be connected with different shafts. The non-coaxial connection is mainly considered that the mounting place of the marine propeller of a part of the transom is depressed, so that it is required to reduce the overall length dimension of the electric steering drive apparatus 30 after mounting. The length direction dimension of the whole electric steering driving device can be reduced by arranging the shafts in different modes.

Preferably, the output shaft 3013 of the motor 301 is a hollow shaft, one end of the lead screw 302 is inserted into the output shaft 3013 of the motor 301, a pin hole is formed in the lead screw 302, and one end of the lead screw 302 is fixedly connected with the output shaft 3013 of the motor 301 through a pin 313 inserted into the pin hole.

In other embodiments, one end of the lead screw 302 and the output shaft 3013 of the motor 301 may also be connected through a coupling.

In other embodiments, the output shaft 3013 of the motor 301 is integrally disposed with the lead screw 302. In this way, connections can be reduced.

The electric steering driving device 30 further includes a current sensor for measuring a current value of the motor 301 or the driver 320, the current sensor is electrically connected to the controller, and the controller controls the motor 301 or the driver 320 to stop operating according to the current value exceeding a set threshold.

The current sensor may be a hall current sensor, or may be a current detection circuit, which is used to detect the operating current of the motor 301. If the operating current of the motor 301 exceeds the rated operating current thereof by a certain range, the motor may be abnormal or locked, so as to control the motor 301 to stop operating to protect the electric steering driving device 30.

The electric steering driving device 30 further includes a temperature sensor for measuring a temperature value of the motor 301 or the driver 320, the temperature sensor is electrically connected to the controller, and the controller controls the motor 301 or the driver 320 to stop operating according to the temperature value exceeding a set threshold value.

The embodiment of the utility model provides an electricity turns to drive arrangement and marine propeller electric steering system, whole electricity turns to drive arrangement and fixes and has tentatively restricted beating of lead screw on turning to the connecting pipe. The first end and the motor of lead screw are connected, and the second end is connected with screw-nut, reduce through increasing the support sliding sleeve and beat. In addition, the lead screw may be integrated with the output shaft of the motor to reduce run-out. Or the output shaft of the first motor is a hollow shaft, and the length of the lead screw is extended to enable the lead screw to be inserted into the output shaft of the motor, so that the jumping of the lead screw is greatly reduced, the interchangeability of the system is increased, and the production steps are simplified

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. The electric steering driving device is fixed on a steering connecting pipe arranged on a marine propeller along the horizontal direction, and is connected with a connecting rod to drive the marine propeller to rotate in the vertical direction relative to the steering connecting pipe;

the marine propeller is characterized by comprising a motor, a screw rod nut and a supporting sliding sleeve, wherein the screw rod and the screw rod nut are arranged in a steering connecting pipe of the marine propeller, and the screw rod, the screw rod nut and the supporting sliding sleeve are sequentially sleeved; the first end of the screw rod is connected with an output shaft of the motor, the screw rod nut is in threaded connection with the second end of the screw rod, and the support sliding sleeve is fixed in the steering connecting pipe and is in sliding connection with the screw rod nut; the screw rod nut located at the second end of the screw rod moves linearly along the screw rod, and the second end of the screw rod is indirectly supported through the support sliding sleeve.

2. The electric steering driving device according to claim 1, further comprising a push rod disposed in the steering connecting tube in parallel with a lead screw, wherein the push rod is fixedly connected with the lead screw nut, the support sliding sleeve is slidably connected with the push rod, and the push rod and the lead screw nut move linearly along the lead screw together.

3. The electric steering driving device according to claim 2, wherein the push rod is a hollow push rod, and the lead screw nut, the push rod and the support sliding sleeve are sequentially sleeved outside the lead screw from inside to outside.

4. The electric steering drive according to claim 3, wherein the axes of the screw rod, the motor output shaft, and the steering connecting pipe in the horizontal direction are parallel to each other.

5. The electric steering driving device according to claim 1, further comprising a joint for connecting the motor and the steering connecting pipe, wherein the joint is in a horn shape, the end with the larger outer diameter of the joint is fixedly connected with a housing of the motor, and the end with the smaller outer diameter of the joint is screwed outside the end of the steering connecting pipe; the screw rod penetrates through the joint to be connected with the motor.

6. The electric steering driving device according to claim 5, wherein a first bearing and a dynamic sealing member are disposed in an inner hole of the joint, an outer ring of the first bearing is in interference fit with an inner hole wall of the joint, an inner ring of the first bearing is sleeved on the screw rod, an outer ring of the dynamic sealing member is in interference fit with the inner hole wall of the joint, an inner ring of the dynamic sealing member is sleeved on the screw rod, the first bearing is located behind the dynamic sealing member, and the dynamic sealing member is used for sealing the motor.

7. The electric steering drive according to claim 1, wherein an output shaft of the motor is disposed coaxially with the lead screw, and the lead screw is connected to the motor output shaft through a pin or a coupling.

8. The electric steering drive according to claim 1, wherein an output shaft of the motor is provided coaxially with the lead screw, and the output shaft of the motor is provided integrally with the lead screw.

9. The electric steering driving device according to claim 1, wherein the motor is an external rotor motor, and comprises a stator and a rotor, the rotor is connected with the screw rod through an output shaft of the motor, a through hole is formed in the center of the stator, and a first end of the screw rod extends and penetrates through the through hole to be connected with the second bearing.

10. An electric power steering system for a marine propeller, comprising a steering device and the electric power steering drive device according to any one of claims 1 to 9.

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