Driving mechanism and air door device

Abstract

A driving mechanism and an air door device including the driving mechanism. A switch signal can be switched when a driving gear rotates forward to one position and rotates backward to another position. The driving mechanism comprises the following components in a shell: a switch; a rotary pressing member rotating toward a pressing direction in which a first pressing portion presses the switch and a departure direction in which the first pressing portion departs from the switch; a force application component for driving the rotary pressing member to rotate toward the pressing direction; a driving gear for driving the rotary pressing member to rotate, a motor for driving the driving gear to rotate and a driven gear being engaged with the driving gear are further arranged in the shell, the driving gear is provided with a first abutting portion and a second abutting portion arranged along the circumferential direction.

What is claimed is: 
     
         1 . A driving mechanism, comprising a shell, wherein a switch mechanism is arranged in the shell, and the switch mechanism comprises: a switch; a rotary pressing member, wherein the rotary pressing member is provided with a first pressing portion and a second pressing portion arranged in the circumferential direction around the rotation axis of the rotary pressing member, and is capable of rotating toward a pressing direction in which the first pressing portion presses the switch and a departure direction in which the first pressing portion departs from the switch; a force application component, wherein the force application component applies a force to the rotary pressing member to drive the rotary pressing member to rotate toward one of the pressing direction and the departure direction; and a driving gear, wherein the driving gear abuts against the second pressing portion to drive the rotary pressing member to rotate, a motor and a driven gear are further arranged in the shell, the driving gear rotates under the driving of the motor, and the driven gear can be engaged with the driving gear, wherein,
 the motor is a bidirectionally rotatable stepping motor,   the driving gear is provided with a first abutting portion and a second abutting portion arranged in the circumferential direction around the rotation axis of the driving gear, and is configured to: when the driving gear rotates toward a first direction to a first position, drive the first abutting portion to start to abut against the second pressing portion, so that the rotary pressing member rotates toward the other of the pressing direction and the departure direction, and when the driving gear rotates toward a second direction opposite to the first direction to a second position, drive the second abutting portion to start to abut against the second pressing portion, so that the rotary pressing member rotates toward the other of the pressing direction and the departure direction.   
     
     
         2 . The driving mechanism of  claim 1 , wherein,
 a gear transmission mechanism is further arranged in the shell, the gear transmission mechanism transmits the rotation of the motor to the driving gear, and   the driving gear comprises:   a driving gear shaft portion, wherein the driving gear shaft portion extends along the rotation axis of the driving gear;   a first gear portion, wherein the first gear portion is arranged on the driving gear shaft portion in such a manner that the rotation axis of the first gear portion is consistent with the rotation axis of the driving gear, and the first gear portion is engaged with the last stage gear in the gear transmission mechanism;   a second gear portion, wherein the second gear portion is arranged on the driving gear shaft portion in such a manner that the rotation axis of the second gear portion is consistent with the rotation axis of the driving gear, and the second gear portion is engaged with the driven gear;   a first protrusion portion, wherein the first protrusion portion extends radially outward from the driving gear shaft portion and constitutes the first abutting portion; and   a second protrusion portion, wherein the second protrusion portion extends radially outward from the driving gear shaft portion in the circumferential direction in a manner of spacing apart from the first protrusion portion by a gap, and constitutes the second abutting portion.   
     
     
         3 . The driving mechanism of  claim 1 , wherein,
 the rotation axis of the rotary pressing member is parallel to the rotation axis of the driving gear,   in the case of observation along the rotation axis of the rotary pressing member, when the first abutting portion abuts against the second pressing portion, the angle formed by a connecting line between the action point of a first force applied by the first abutting portion to the second pressing portion and the rotation axis of the rotary pressing member relative to the direction of the first force is 20 degrees to 160 degrees, and/or, when the second abutting portion abuts against the second pressing portion, the angle formed by the connecting line between the action point of a second force applied by the second abutting portion to the second pressing portion and the rotation axis of the rotary pressing member relative to the direction of the second force is 20 degrees to 160 degrees.   
     
     
         4 . The driving mechanism of  claim 1 , wherein,
 the surface of the second pressing portion abutting against the first abutting portion or the second abutting portion is a convex arc surface, and   the surface of the first abutting portion and/or the second abutting portion abutting against the second pressing portion comprises a concave arc surface.   
     
     
         5 . The driving mechanism of  claim 1 , wherein,
 the rotary pressing member comprises:   a pressing member shaft portion, wherein the pressing member shaft portion extends along the rotation axis of the rotary pressing member;   a first arm portion, wherein the first arm portion extends radially outward from the pressing member shaft portion, and the first pressing portion is arranged at the front end of the first arm portion; and   a second arm portion, wherein the second arm portion extends radially outward from the pressing member shaft portion, and the second pressing portion is arranged at the front end of the second arm portion.   
     
     
         6 . The driving mechanism of  claim 1 , wherein,
 the force application component is a spiral spring arranged coaxially with the rotary pressing member,   one end of the spiral spring is clamped in the shell, and   the other end of the spiral spring is clamped in the rotary pressing member.   
     
     
         7 . An air door device, comprising:
 the driving mechanism of  claim 1 ;   a frame, wherein the frame is connected to the shell of the driving mechanism and is provided with an opening portion; and   a baffle, wherein the baffle is arranged on the frame in a manner of being able to rotate, open and close the opening portion, and is directly or indirectly connected with the driven gear.   
     
     
         8 . The air door device of  claim 7 , wherein,
 the baffle is provided with an elastic sealing sheet, the elastic sealing sheet is deformed by abutting against the periphery of the opening portion to completely close the opening portion,   in the case that the driving gear rotates toward the first direction, the baffle rotates toward the direction of opening the opening portion, in the case that the driving gear rotates toward the second direction, the baffle rotates toward the direction of closing the opening portion, and   the engagement between the driving gear and the driven gear is released immediately before the driving gear rotates toward the second direction to the second position.   
     
     
         9 . An air door device of  claim 7 , wherein,
 a gear transmission mechanism is further arranged in the shell, the gear transmission mechanism transmits the rotation of the motor to the driving gear, and   the driving gear comprises:   a driving gear shaft portion, wherein the driving gear shaft portion extends along the rotation axis of the driving gear;   a first gear portion, wherein the first gear portion is arranged on the driving gear shaft portion in such a manner that the rotation axis of the first gear portion is consistent with the rotation axis of the driving gear, and the first gear portion is engaged with the last stage gear in the gear transmission mechanism;   a second gear portion, wherein the second gear portion is arranged on the driving gear shaft portion in such a manner that the rotation axis of the second gear portion is consistent with the rotation axis of the driving gear, and the second gear portion is engaged with the driven gear;   a first protrusion portion, wherein the first protrusion portion extends radially outward from the driving gear shaft portion and constitutes the first abutting portion; and   
       a second protrusion portion, wherein the second protrusion portion extends radially outward from the driving gear shaft portion in the circumferential direction in a manner of spacing apart from the first protrusion portion by a gap, and constitutes the second abutting portion. 
     
     
         10 . An air door device of  claim 7 , wherein,
 the rotation axis of the rotary pressing member is parallel to the rotation axis of the driving gear,   
       in the case of observation along the rotation axis of the rotary pressing member, when the first abutting portion abuts against the second pressing portion, the angle formed by a connecting line between the action point of a first force applied by the first abutting portion to the second pressing portion and the rotation axis of the rotary pressing member relative to the direction of the first force is 20 degrees to 160 degrees, and/or, when the second abutting portion abuts against the second pressing portion, the angle formed by the connecting line between the action point of a second force applied by the second abutting portion to the second pressing portion and the rotation axis of the rotary pressing member relative to the direction of the second force is 20 degrees to 160 degrees. 
     
     
         11 . An air door device of  claim 7 , wherein,
 the surface of the second pressing portion abutting against the first abutting portion or the second abutting portion is a convex arc surface, and   
       the surface of the first abutting portion and/or the second abutting portion abutting against the second pressing portion comprises a concave arc surface. 
     
     
         12 . An air door device of  claim 7 , wherein,
 the rotary pressing member comprises:   a pressing member shaft portion, wherein the pressing member shaft portion extends along the rotation axis of the rotary pressing member;   a first arm portion, wherein the first arm portion extends radially outward from the pressing member shaft portion, and the first pressing portion is arranged at the front end of the first arm portion; and   
       a second arm portion, wherein the second arm portion extends radially outward from the pressing member shaft portion, and the second pressing portion is arranged at the front end of the second arm portion. 
     
     
         13 . An air door device of  claim 7 , wherein,
 the force application component is a spiral spring arranged coaxially with the rotary pressing member,   one end of the spiral spring is clamped in the shell, and   the other end of the spiral spring is clamped in the rotary pressing member.