Actuator and vehicle door opening and closing actuator

• US 10,641,028 B2
• Filed: 11/08/2017
• Issued: 05/05/2020
• Est. Priority Date: 11/14/2016
• Status: Active Grant

• Current Assignee: Mitsuba Corporation
• Original Assignee: Mitsuba Corporation
• Inventors: Takizawa, Takashi, Mochizuki, Masamori
• Primary Examiner(s): Gonzalez, Luis A
• Application Number:
  US16/348,866
• Publication Number:
  US 20190277076A1
• Time in Patent Office: 909 Days
• CPC Class Codes: B60J 5/10 arranged at the vehicle rear B60J5/04 takes precedence ; bonnets or lids B62D25/10; tail gates for pick-up trucks B62D33/0273; counterbalancing E05F; springs, e.g. pneumatic F16F
• CPC Class Codes: B60J 5/101 for non-load transporting vehicles, i.e. family cars including vans
• CPC Class Codes: E05F 1/1058 for counterbalancing
• CPC Class Codes: E05F 15/622 using screw-and-nut mechanisms
• CPC Class Codes: E05Y 2201/72 Planetary gearing
• CPC Class Codes: E05Y 2800/232 of motors and transmissions
• CPC Class Codes: E05Y 2800/236 of motors and springs
• CPC Class Codes: E05Y 2800/428 against water
• CPC Class Codes: E05Y 2900/546 Tailgates
• CPC Class Codes: F16H 2025/2031 Actuator casings
• CPC Class Codes: F16H 25/20 Screw mechanisms with automatic reversal F16H25/12
• CPC Class Codes: F16H 25/2021 with means for avoiding overloading
• CPC Class Codes: F16J 15/10 with non-metallic packing
• CPC Class Codes: F16J 15/102 characterised by material
• CPC Class Codes: H02K 1/17 Stator cores with permanent magnets
• CPC Class Codes: H02K 11/215 Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
• CPC Class Codes: H02K 5/10 with arrangements for protection from ingress, e.g. water or fingers
• CPC Class Codes: H02K 5/145 Fixedly supported brushes or brush holders, e.g. leaf or leaf-mounted brushes
• CPC Class Codes: H02K 5/1735 radially supporting the rotary shaft at only one end of the rotor H02K5/1737 takes precedence
• CPC Class Codes: H02K 7/06 Means for converting reciprocating motion into rotary motion or vice versa
• CPC Class Codes: H02K 7/085 : radially supporting the rotary shaft at only one end of the rotor H02K7/086, H02K7/09 take precedence
• CPC Class Codes: H02K 7/114 : with dynamo-electric clutches in combination with brakes
• CPC Class Codes: H02K 7/116 : with gears
• CPC Class Codes: H02K 7/14 : Structural association with mechanical loads, e.g. with hand-held machine tools or fans with fan or impeller for cooling the machine H02K9/06

Abstract

The present invention is provided with: a first housing; a second housing; a guide tube; a third housing; a motor part that is incorporated in the first housing; a screw shaft that is driven to rotate upon reception of the rotational force of a shaft of the motor part and applies power to the third housing; a bearing holder that is provided in the first housing; an inner flange that is provided in the second housing; an outer flange that is provided in the guide tube and that is arranged at a position where the outer flange overlaps the inner flange in an axial direction; a seal that is sandwiched between the inner and the outer flanges; and a coil spring (47) that is provided between the second housing (7) and the guide tube (48) and presses the inner flange (46) toward the outer flange (49) side.

Claims

1. An actuator comprising:

a first housing that is cylindrical;

a second housing that is cylindrical and fitted into one end side of the first housing;

a guide member that is cylindrical and provided in at least the second housing;

a third housing that is cylindrical and provided in the second housing on a side opposite to the first housing and is provided so as to protrude and retract relative to the second housing;

a motor part that is accommodated in the first housing and has a rotation shaft;

a drive shaft that is provided at least in the third housing, is rotatably driven by receiving a rotational force of the rotation shaft of the motor, and applies power to the third housing;

a bearing holder that is provided in the first housing and supports a bearing for rotatably supporting at least one of the rotation shaft and the drive shaft;

a housing side clamping portion provided in the second housing;

a guide side clamping portion that is provided in the guide member and is disposed at a position that overlaps the housing side clamping portion in an axial direction;

a first seal portion that is provided between the housing side clamping portion and the guide side clamping portion, and is clamped by the housing side clamping portion and the guide side clamping portion; and

a spring member that is provided between the second housing and the guide member, and presses one of the housing side clamping portion and the guide side clamping portion toward the other.

2. The actuator according to claim 1, wherein the housing side clamping portion is an inner flange which is provided at an end portion of the second housing on the bearing holder side to protrude radially inward, and

the guide side clamping portion is an outer flange which is provided closer to the bearing holder side than the housing side clamping portion of the guide member and protrudes radially outward.

3. The actuator according to claim 2, wherein the guide side clamping portion abuts the bearing holder.

4. The actuator according to claim 1, wherein the third housing is fitted into the second housing, and

the second seal portion for securing a sealing property between the third housing and the second housing is provided in a region where the third housing and the second housing overlap each other while the third housing reaches a protruded state from a retracted state relative to the second housing.

5. The actuator according to claim 1, wherein a third seal portion is provided between the bearing and at least any one of the rotation shaft and the drive shaft for securing a sealing property between the bearing and at least any one of the rotation shaft and the drive shaft.

6. The actuator according to claim 1, wherein a fourth seal portion is provided between the bearing and the bearing holder to secure a sealing property between the bearing and the bearing holder.

7. A vehicle door opening and closing actuator, having an actuator for opening and closing a door provided in an openable and closable manner with respect to an opening portion of a vehicle, the vehicle door opening and closing actuator comprising:

a first housing that is cylindrical;

a second housing that is cylindrical and fitted into one end side of the first housing;

a guide member that is cylindrical and provided in at least the second housing;

a third housing that is cylindrical and provided in the second housing on a side opposite to the first housing and is provided so as to protrude and retract relative to the second housing;

a motor part that is accommodated in the first housing and has a rotation shaft;

a drive shaft that is provided at least in the third housing, is rotatably driven by receiving a rotational force of the rotation shaft of the motor, and applies power to the third housing;

a bearing holder that is provided in the first housing and supports a bearing for rotatably supporting at least one of the rotation shaft and the drive shaft;

a housing side clamping portion provided in the second housing;

a guide side clamping portion that is provided in the guide member and is disposed at a position that overlaps the housing side clamping portion in an axial direction;

a first seal portion that is provided between the housing side clamping portion and the guide side clamping portion, and is clamped by the housing side clamping portion and the guide side clamping portion; and

a spring member that is provided between the second housing and the guide member, and presses one of the housing side clamping portion and the guide side clamping portion toward the other.

8. The vehicle door opening and closing actuator according to claim 7, wherein the housing side clamping portion is an inner flange which is provided at an end portion of the second housing on the bearing holder side to protrude radially inward, and

the guide side clamping portion is an outer flange which is provided closer to the bearing holder side than the housing side clamping portion of the guide member and protrudes radially outward.

9. The vehicle door opening and closing actuator according to claim 8, wherein the guide side clamping portion abuts the bearing holder.

10. The vehicle door opening and closing actuator according to claim 7, wherein the third housing is fitted into the second housing, and

the second seal portion for securing a sealing property between the third housing and the second housing is provided in a region where the third housing and the second housing overlap each other while the third housing reaches a protruded state from a retracted state relative to the second housing.

11. The vehicle door opening and closing actuator according to claim 7, wherein a third seal portion is provided between the bearing and at least any one of the rotation shaft and the drive shaft for securing a sealing property between the bearing and at least any one of the rotation shaft and the drive shaft.

12. The vehicle door opening and closing actuator according to claim 7, wherein a fourth seal portion is provided between the bearing and the bearing holder to secure a sealing property between the bearing and the bearing holder.