JP2019217966A - Storage type auxiliary step for vehicle - Google Patents

Abstract

To prevent an arm supporting a step board, and a come-off preventing member to be attached to a support shaft tip suspended to a step board bottom for come-off prevention from the arm from projecting downward from an end rail bottom edge of the step board.SOLUTION: A storage type auxiliary step for a vehicle is such that: arm 3 base ends having the same radius of rotation are pivotally attached to the lower part of a vehicle step S, and an arm 3 tip is pivotally attached to the bottom of a step board 1; the step board 1 is provided so as to freely reciprocate on the same horizontal plane between a storage position X in the lower part of the vehicle step S and an overhang position Y at the lower front of the vehicle step S; a support shaft 5 for pivotally attaching the arm 3 tip suspended to the bottom of the step board 1 is formed so as to prevent the tip from projecting from an end rail 1a bottom edge suspended to an appropriate circumference of the step board 1, and is rotatably inserted into a shaft hole 3b punched at the arm 3 tip thinly formed so as to prevent the lower side from projecting from the end rail 1a bottom edge in a pivoted state to the support shaft 5; and a come-off preventing member 6 to be attached to the support shaft 5 tip as prevention of come-off from the shaft hole 3b is immersed and arranged in a countersink part 3c recessed in the lower side opening end of the shaft hole 3b.SELECTED DRAWING: Figure 3

Description

  TECHNICAL FIELD The present invention relates to a retractable auxiliary step for a vehicle, which is arranged between a vehicle step already installed in a vehicle such as a passenger car, a one-box car, a bus and the ground surface.

  The retractable auxiliary step for a vehicle disclosed in Patent Literature 1 is configured such that the base ends of a drive arm and a driven arm having the same radius of rotation are pivotally attached to the lower portion of the vehicle step, and the distal ends of the drive arm and the driven arm are connected to the bottom of the tread plate. The drive arm has a driven gear that is rotatably mounted on its base end rotation shaft, and is meshed with the driven gear connected to a drive source.

  Then, by rotating the drive gear forward and reverse by the operation of the drive source, the arm is rotated forward and backward through the driven gear, and the tread plate is moved from the storage position at the lower part of the vehicle step to the overhang position in front of the lower part of the vehicle step. It is reciprocable on the same horizontal plane.

JP 2004-359067 A

  In the auxiliary step of the above configuration, the leading ends of the drive and driven arms that support the tread plate by pivotally attaching to a support shaft suspended from the bottom of the tread plate are positioned at the lower side of the lower end of the curtain plate provided at an appropriate position on the periphery of the tread plate. At the lower end of the arm tip, a very low head bolt which is screwed into the end (lower end) of the support shaft vertically penetrating the arm tip by inserting a washer with a larger diameter than this is projected downward. .

  Also, since the tread is mounted outside the vehicle below the vehicle step, if the arm or the extremely low head bolt protrudes downward from the lower end of the curtain plate of the tread as described above, the minimum ground clearance will be low, and the road surface and It has a problem that it easily comes into contact with curbs and other obstacles.

  Therefore, in the present invention, a retaining member (a washer and a very low head bolt) attached to an arm supporting the tread plate and a tip of a spindle vertically suspended at the bottom of the tread plate to prevent the tread plate from coming off from the arm is provided with a lower end of the curtain plate of the tread plate. It is an object of the present invention to provide a retractable auxiliary step for a vehicle in which the minimum ground clearance of the tread is made as high as possible without protruding downward.

  In view of the above problem, a retractable auxiliary step for a vehicle according to the present invention pivotally connects a base end of a pair of left and right arms having the same rotation radius to a lower portion of the vehicle step, and pivotally connects a distal end of the arm to a bottom of a tread plate. A support shaft provided so as to be reciprocally movable on the same horizontal plane between a stowed position at a lower portion of the vehicle step and an extended position in front of a lower portion of the vehicle step, and pivotally attached to an end of an arm vertically provided at the bottom of the tread plate. The arm is formed so that the leading end does not protrude from the lower end of the curtain plate which is appropriately suspended from the peripheral edge of the tread plate, and is formed so as to be thin so that the lower side does not protrude from the lower end of the curtain plate in a state of being pivotally connected to the support shaft. A stopper member rotatably inserted into a shaft hole formed at the tip of the shaft hole, and attached to the tip of the support shaft for preventing removal from the shaft hole in a counterbore recessed at the lower opening end of the shaft hole. Is characterized by being immersed.

  In short, according to the present invention, the base ends of a pair of left and right arms having the same rotation radius are pivotally connected to the lower portion of the vehicle step, and the ends of the arms are pivotally connected to the bottom of the tread plate. And a retractable auxiliary step for a vehicle provided so as to be able to reciprocate on the same horizontal plane between and a projecting position in front of a lower portion of the vehicle step, wherein a support shaft for pivotally attaching an arm tip vertically provided to the bottom of the tread plate, The tip of the arm which is formed so that the tip does not protrude from the lower end of the curtain plate which is appropriately suspended from the peripheral edge of the tread plate, and which is formed thin so that the lower side does not protrude from the lower end of the curtain plate in a state of being pivotally connected to the support shaft. A stopper member is rotatably inserted into a shaft hole formed in the shaft hole, and a retaining member attached to the tip of the support shaft is inserted into a counterbore portion recessed at the lower opening end of the shaft hole to prevent the shaft hole from coming off. As it is placed, the tip of the arm hanging vertically at the bottom of the tread plate is pivoted Each of the support shaft and the arm through which the support shaft is rotatably inserted does not protrude below the lower end of the curtain plate of the tread plate, and furthermore, a stopper which is attached to the tip of the support shaft to prevent the arm from coming off. Since the members are immersed in the counterbore of each arm and do not protrude below the lower end of the curtain plate of the tread plate, the conventional retractable type for vehicles where the arm and the retaining member protrude downward from the lower end of the tread plate. Compared with the auxiliary steps, the minimum ground clearance of the tread is increased, and the practical effect is extremely large, such as making it difficult to contact the road surface, the curb, and other obstacles.

FIG. 4 is a schematic plan view showing the extended state of the retractable auxiliary step for a vehicle according to the present invention. It is a schematic plan view which shows a storage state same as the above. It is AA sectional drawing of FIG. It is a principal part enlarged plan view of a transmission means. It is a schematic plan view which shows the extended state of the 2nd example of a vehicle retractable assistance step. It is a schematic plan view which shows a storage state same as the above.

  The retractable auxiliary step for a vehicle according to the present invention is provided between a storage position X on the left side (front of the vehicle) below the vehicle step S and a projecting position Y on the lower front of the vehicle step S, which are already provided at a rear entrance of the vehicle (not shown). Are provided on the same horizontal plane.

  The tread plate 1 is formed in a horizontally long rectangular shape (long in the front-rear direction L of the vehicle) in a plan view, and a strip plate-like curtain plate 1a is suspended from an appropriate peripheral edge of the tread plate 1 (a front end and a front side edge in the illustrated example). In the lower part of the vehicle step S, the bases of the drive arm 2 and the driven arm 3 having the same turning radius (hereinafter, also simply referred to as arms 2 and 3) are provided at the lower part of the vehicle step S and have a rectangular base in plan view. 4 and the leading ends of the drive arm 2 and the driven arm 3 are pivotally attached to the left and right sides of the bottom of the tread 1, respectively. The translation is performed between the outgoing positions Y.

  The base ends of the arms 2 and 3 are horizontally attached to the lower ends of sleeves 2a and 3a rotatably fitted on a machine shaft 4a vertically suspended from the lower surface of the base 4, and each arm 2 and 3 is bent into a predetermined shape. In this way, the tip for mounting the tread plate 1 is arranged on the same horizontal plane.

  The support shaft 5 for pivotally connecting the ends of the arms 2 and 3 vertically suspended to the bottom of the tread plate 1 is formed so that the front end (lower end) does not protrude from the lower end of the curtain plate 1a of the tread plate 1 and is pivotally connected to the support shaft 5. In this state, the arm 2 is formed thin so that the lower side does not protrude below the lower end of the curtain plate 1a. The arms 2 and 3 are rotatably inserted into the shaft holes 2b and 3b formed at the ends thereof, and the lower side of the shaft holes 2b and 3b. A retaining member 6 attached to the tip of the support shaft 5 for preventing removal from the shaft holes 2b, 3b is immersed in the counterbore portions 2c, 3c formed at the open ends to be larger in diameter than the shaft holes 2b, 3b. are doing.

  The retaining member 6 has a washer 6a having an outer diameter larger than that of the support shaft 5 and a smaller diameter than the counterbore portions 2c and 3c, and a screw which is inserted through the washer 6a to the tip (lower end) surface of the support shaft 5. And a very low head bolt 6b.

  As a result, the arms 2 and 3 vertically attached to the bottom of the tread plate 1 and the support shaft 5 for pivotally connecting the tips thereof, and the arms 2 and 3 through which the support shaft 5 is rotatably inserted project downward from the lower end of the curtain plate 1a of the tread plate 1. And a retaining member 6 (a washer 6a and a very low head bolt 6b) attached to the tip of the support shaft 5 to prevent the arm 2, 3 from coming off. And does not protrude downward from the lower end of the curtain plate 1a of the treadle 1.

  Note that, since the pivot structure of the ends of the arms 2 and 3 with respect to the bottom of the tread plate 1 is the same, FIG. 3 shows a cross section of the pivot structure of the driven arm 3 with the tread plate 1 as a representative example. Illustration of the cross section of the structure is omitted.

The drive unit 7 of the tread plate 1 is provided between the arms 2 and 3 on the lower surface of the base 4.
The drive section 7 is connected to a drive arm 2 via a transmission means 9 to a drive source 8 composed of an electric motor.

  The drive source 8 is fixed substantially at the center of the lower surface of the base 4, and has a drive gear 8 a mounted on a drive shaft of the drive source 8 that is rotatable forward and backward.

  The transmission means 9 is arranged behind the driving source 8 (on the side of the driver's seat), and meshes with the driving gear 8a to advance and retreat in the longitudinal direction L of the vehicle. And an element 11 for converting the reciprocating swing.

  The rack 10 is provided with a long hole 10b extending from the left end (front of the vehicle) to the right over a predetermined length, and a pair of right and left trochanters 12 and 12a hanging down at appropriate positions on the lower surface of the base 4 are formed in the long hole 10b. The rack 10 is slidably disposed in the hole 10b, and a flange for slidingly supporting the rack 10 is provided at the lower end of the support shaft of the trochanters 12 and 12a so as to protrude outward.

  The rack 10 is configured so that the root of the tooth 10a meshing with the drive gear 8a is narrowed, and the tooth 10a is damaged or lost (damaged) when a predetermined load (overload) is applied to the rack 10. (See FIG. 4).

  The element 11 comprises a fan-shaped driven gear 11 which is fixed to the sleeve 2a at the base end of the drive arm 2 so as to be coaxial with the base end rotation axis (machine axis 4a) and meshes with the rack 10.

  Thus, the rack 10 meshing with the drive gear 8a is moved forward and backward in the longitudinal direction L of the vehicle by the drive gear 8a that rotates forward and reverse by the operation of the drive source 8, and the drive arm 2 is driven via the driven gear 11 by the advance and retreat. The stepping plate 1 is rotated to reciprocate between the retracted position X and the extended position Y, and the rack 10 and the driven gear 11 are interposed between the driving gear 8a of the driving source 8 and the base end of the driving arm 2. Thus, the installation location of the drive source 8 is separated from the base end of the drive arm 2 so that the installation location of the drive source 8 can be secured relatively easily in the front-rear direction of the vehicle even under the vehicle step S outside the vehicle.

  In the following, the state in which the tread 1 is disposed at the storage position X is referred to as a stored state, and the state in which the tread 1 is disposed at the overhang position Y is referred to as an overhang state.

  Immediately before the treadle 1 is placed at the storage position X, the tip that resiliently contacts the protrusion 3d protruding from the tip of the driven arm 3 to prevent the treadle 1 from rotating in the storage direction is made of synthetic rubber. A stopper 13 is provided at an appropriate position on the bottom of the tread 1 so that the arms 2 and 3 do not rotate once even when the tread 1 is located at the storage position X, and the element 11 and the rack 10 linked to the drive arm 2 are moved to the tread 1. To the fixed position X in the storage state of the vehicle, and the storage state of the tread 1 under the vehicle step S is firmly held.

  Immediately before the treadle 1 is disposed at the overhang position Y, the tip end of the drive arm 2 elastically contacts the left end edge of the drive arm 2 to prevent the treadle 1 from rotating in the overhang direction. Even when the treadle 1 is located at the overhang position Y, the arms 2 and 3 do not rotate once even when the treadle 1 is located at the bottom of the treadle 1, and the element 11 and the rack 10 linked to the drive arm 2 are connected to the treadle 1. The position of the tread plate 1 at the lower front of the vehicle step S is firmly held and securely held at the fixed position Y in the overhang state.

Next, a second example of the vehicular retractable assist step will be described with reference to FIGS.
This vehicle retractable auxiliary step is obtained by changing a part of the transmission means 9 (the element 11 and a part linked thereto), and the other configuration is the same as that described above. Are denoted by the same reference numerals in the drawings, and description thereof will be omitted.

  That is, the element 11 in this embodiment pivotally connects the protruding end 15a of the protruding piece 15 protruding from the base end of the drive arm 2 in the opposite direction to the drive arm 2 and one end (right end) of the rack 10. Link 11.

  As a result, the rack 10 meshing with the drive gear 8a is moved forward and backward in the longitudinal direction L of the vehicle by the drive gear 8a that rotates forward and backward by the operation of the drive source 8, and the drive arm 2 is rotated via the link 11 by the advance and retreat. To move the treadle 1 back and forth between the storage position X and the overhang position Y, and the rack 10 and the link 11 are interposed between the drive gear 8a of the drive source 8 and the base end of the drive arm 2; The installation location of the drive source 8 is separated from the base end of the drive arm 2 so that the installation location of the drive source 8 can be secured relatively easily in the longitudinal direction of the vehicle even at the lower part of the vehicle step S outside the vehicle.

  In the vehicular retractable assisting step configured as described above, the rack 10 and the element 11 are interposed between the drive gear 8a of the drive source 8 and the drive arm 2, so that the drive source 8 is installed. The location of the drive source 2 is separated from the drive arm 2, and the installation location of the drive source 2 is secured in the front-rear direction L of the vehicle even at the lower part of the vehicle step S outside the vehicle, so that the installation can be easily performed. In the retracted state, the treadboard 1 is arranged forward on the left side below the vehicle step S so that the front edge of the tread plate 1 is parallel to the outer edge of the vehicle step S.

  In the retracted state, the drive gear 8a meshes with the rack 10 in which the left end of the elongated hole 10b is in contact with the left trochanter 12, and the drive source 8 is stopped. The tread 1 is horizontally arranged at the storage position X below the vehicle step S.

  Further, since the protrusion 3d of the driven arm 3 is stopped by the stopper 13, the arms 2 and 3 are prevented from further rotating in the storage direction, and the stored state of the tread 1 is stably maintained (FIG. 2). , 6).

  Further, a support shaft 5 for pivotally connecting the arms 2 and 3 which are vertically provided to the bottom of the tread plate 1 and the arms 2 and 3 for rotatably inserting the support shaft 5 protrude downward from the lower end of the curtain plate 1a of the tread plate 1. And a retaining member 6 (a washer 6a and a very low head bolt 6b) attached to the tip of the support shaft 5 to prevent the arm 2, 3 from coming off is attached to the counterbore portions 2c, 3c of the arms 2, 3. Since the arms 2 and 3 and the retaining member 6 protrude downward from the lower end of the curtain plate 1a of the tread plate 1 because the arm 2 and 3 and the retaining member 6 do not protrude downward from the lower end of the curtain plate 1a of the tread plate 1, In comparison, the minimum ground clearance of the tread 1 is increased, making it difficult to contact the road surface, the curb, and other obstacles (see FIG. 3).

  When the rack 10 is moved to the left through the drive gear 8a by the operation of the drive source 8, the drive arm 2 rotates together with the driven arm 3 in the projecting direction via an element (driven gear or link) 11. The tread plate 1 moves in parallel while maintaining its horizontal state, and projects to the lower front of the vehicle step S, the right end of the long hole 10b of the rack 10 approaches the right trochanter 12a, and the stopper 14 The overhang of the tread plate 1 is completed by being stopped by the left edge, and the passenger in the overhung state can use the tread plate 1 as a foot joint to the vehicle step S (see FIGS. 1 and 5).

  The storage of the protruding tread 1 can be achieved by operating the drive source 8 and moving the tread 1 to the storage position X in the reverse procedure.

  In addition, while the vehicle is running, the vehicle climbs over a step having a step on a road or a parking lot, or runs over a sidewalk having a step with a step in a state where a step is overhanging when parking or stopping, and the stepping plate 1 is moved to the step or the sidewalk. If the edge is suddenly brought into contact, an external force (overload) acts on one of the left and right edges of the tread 1.

  Even if the drive arm 2 swings freely through the tread plate 1 due to this external force, the external force is transmitted to the rack 10 connected to the drive arm 2 and concentrated on the confined root of the tooth portion 10a. The portion 10a is damaged or missing (damaged) (see FIG. 4).

  For this reason, even if the treadle 1 is to be operated thereafter, the drive gear 8a does not move due to idling, or the treadle 1 operates normally because the treadle 1 barely operates and generates abnormal noise. Since there is no trouble, it is possible to recognize a failure, and thereby it is possible to avoid the danger of stepping on the tread plate 1, swinging the tread plate 1 and falling down the passenger.

1 Footboard
1a curtain plate 2 arm
2b Shaft hole
2c Counterbore 3 Arm
3b Shaft hole
3c Counterbore part 5 Support shaft 6 Retaining member S Vehicle step X Storage position Y Projection position

Claims (1)

  At the lower part of the vehicle step, the base ends of a pair of left and right arms having the same turning radius are pivotally connected, and the distal ends of the arms are pivotally connected to the bottom of the tread plate. A retractable auxiliary step for a vehicle provided to be reciprocally movable on the same horizontal plane between the overhang position of the tread plate and a support shaft for pivotally connecting the tip of an arm vertically suspended to the bottom of the tread plate. A shaft that is formed so that the tip does not protrude from the lower end of the hanging curtain plate, and is formed at the tip of a thin-walled arm so that the lower side does not protrude below the lower end of the curtain plate when pivotally connected to the support shaft. A retaining member is rotatably inserted into the hole, and a retaining member attached to the tip of the support shaft for preventing removal from the shaft hole is immersed in a counterbore portion recessed at the lower opening end of the shaft hole. Vehicle retractable auxiliary step.

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