JP5406603B2 - Deflection control device for driving arm tuning shaft in underfloor retractable vehicle lifting device - Google Patents

Description

  The present invention relates to a deflection suppression device for a driving arm tuning shaft in an underfloor retractable vehicle lifting device.

  Patent Document 1 relates to the applicant of the present patent application, but an underfloor retractable vehicle lifting device that uses the underfloor of a vehicle as a storage portion has been proposed. In Patent Document 2, a driving arm tuning shaft 33 for attaching driving arms 31 to both ends is illustrated, and a rotating crank 34 is attached to the central portion thereof, and a hydraulic cylinder is provided to the central portion of the first beam 23 of the slide frame 21. 25, a structure in which the tip of the piston rod 30 of the hydraulic cylinder 25 is connected to the rotating crank 34 is illustrated, and the lifting device for the underfloor retractable vehicle operated by a cylinder power unit disposed at one central portion. Is disclosed.

JP 2005-59633 A JP-A-8-268138

Driving arm tuned catcher shift 103 of the underfloor storage type vehicle lifting device 101 in Patent Document 1, as shown in FIG. 8, has a right and left driving arms 102 of an integral structure by welding, driving arm 102 of the respective left and right A connecting arm 104 is provided on the side, and a cylinder power unit 105 is connected to the connecting arm 104. The driving force of the driving arm 102 is rotated by the expansion and contraction of the cylinder power unit 105, and the platform 106 supported by the driving arm 102 is moved up and down.

When the platform 106 is lifted, the driving arm tuning shaft 103 is deflected by the force F of the left and right cylinder power unit 105, and a force that is squeezed in the G direction acts on the cylinder 105a of the cylinder power unit 105. Scratches occur, leading to oil leakage.

In order to prevent the bending of the driving arm tuning shaft 103, the cylinder 105a of the cylinder power unit 105 is installed in the center of the driving arm tuning shaft 103, which is disclosed in Patent Document 2, as described above. However, in the case where the height of the storage case is constrained, such as the underfloor retractable vehicle lifting device 101, in recent years, the vehicle has been used due to the convenience of getting on and off. The floor surface of the cylinder 105a tends to be set low, and if the diameter of the cylinder 105a increases, the cylinder 105a cannot be accommodated in the height of the storage case.

  The present invention has been devised for the purpose of solving the above-mentioned drawbacks, and suppresses the deflection of the driving arm tuning shaft 103 generated by the force F of the left and right cylinder power units 105 when the platform 106 is raised. The cylinder 105a having a small diameter is arranged on the left and right, and can be arranged in a limited space under the floor.

  A storage box whose outer shape is formed in a square shape, the opening is aligned with the entrance of the vehicle, and is entirely provided outside the vehicle floor, and a slide that is provided in the storage box and reciprocates toward the opening. In an underfloor retractable vehicle lifting device composed of a frame and a platform connected to and supported by the slide frame, going in and out of the storage box, and lifted and lowered by a power unit arranged on the slide frame outside the storage box. It is passed to the side end bearing plates that constitute the left and right side wall surfaces of the slide frame and is rotatably supported. The arm is connected to the side of the left and right ends. The center part of the driving arm tuning shaft that is provided integrally on the left and right ends of the driving arm is arranged on the slide frame. In deflection suppression device driving arm tuning shaft in underfloor storage type vehicle lifting device comprising a rotatably supported by suppressing the guide.

  The deflection suppressing guide is provided with a bearing portion and a mounting plate portion. A bearing hole is formed in the bearing portion, a dry bearing bush is press-fitted into the inner surface of the bearing hole, and the slide frame is fixed with bolts. It may be good.

  The corresponding portion of the driving arm tuning shaft corresponding to the deflection suppressing guide is provided by a solid metal shaft material in which fitting protrusions are formed at both outer ends, and the driving arm is welded to the end portion of the tubular shaft portion. A fitting protrusion of the solid metal shaft material may be fitted to the inner end, and both may be welded together.

  Since the deflection suppressing device for the driving arm tuning shaft in the underfloor retractable vehicle lifting / lowering device according to the present invention is as described above, a conventional cylinder power device of a thin cylinder can be provided, and the cylinder is a piston. It is not twisted by the rod, and therefore does not cause oil leakage, and contributes to the smoothness of the lifting operation and the durability of the device.

FIG. 1 is a plan view of an entire apparatus in which a deflection suppression apparatus for a driving arm tuning shaft in an underfloor retractable vehicle lifting apparatus according to the present invention is implemented. FIG. 2 is also an enlarged partial side view. FIG. 3 is an enlarged plan view of a deflection suppression device for a driving arm tuning shaft in the underfloor retractable vehicle lifting apparatus of the present invention. Figure 4 is an enlarged sectional view taken along line A-A of FIG. FIG. 5 is a partial longitudinal sectional view in the axial direction of the deflection suppression device for the driving arm tuning shaft. FIG. 6 is a front view of the deflection suppressing guide alone. FIG. 7 is also a side view. FIG. 8 is a plan view for explaining a deflection state of a conventional tuning shaft.

  A storage box whose outer shape is formed in a square shape, the opening is aligned with the entrance of the vehicle, and is entirely provided outside the vehicle floor, and a slide that is provided in the storage box and reciprocates toward the opening. In an underfloor retractable vehicle lifting device composed of a frame and a platform connected to and supported by the slide frame, going in and out of the storage box, and lifted and lowered by a power unit arranged on the slide frame outside the storage box. It is passed to the side end bearing plates that constitute the left and right side wall surfaces of the slide frame and is rotatably supported. The arm is connected to the side of the left and right ends. The center part of the tuning shaft that is integrally provided with the driving arm at the left and right ends is supported by the deflection control guide provided on the slide frame. The deflection suppressing guide is supported by a bearing and a mounting plate. A bearing hole is formed in the bearing, and a dry bearing bush is press-fitted into the inner surface of the bearing. The center portion of the tuning shaft, which is fixed to the slide frame by bolts and supported by the deflection suppressing guide, is provided by a solid metal shaft material having fitting projections formed on both outer ends, and the driving arm is end. The solid metal shaft material fitting protrusion is fitted to the inner end of the tubular shaft portion welded to the portion, and both are integrally welded, and the slide frame is placed inside the upper surface portion and the back surface portion. The rear angle frame is welded, and the rear flat plate is welded to the inside of the lower part of the back part of the slide frame in correspondence with the deflection control guide. Is, the slide frame and the upper bolt deflection suppression device driving arm tuning shaft in underfloor storage type vehicle lifting device mounting portion of the mounting portion and the lower bolt is reinforced in the slide frame.

  Hereinafter, a deflection suppression device for a driving arm tuning shaft in an underfloor retractable vehicle lifting apparatus according to the present invention will be described with reference to FIGS. Device 2 is deployed.

  The underfloor retractable vehicle lifting device 1 is provided in a storage box 3, a slide frame 4 that is arranged in the storage box 3, moves back and forth, and is connected to and supported by the slide frame 4. The platform 5 is configured.

  The storage box 3 has a rectangular outer shape, and the opening 3a on the back of the storage box 3 is aligned with the entrance 6a on the rear part of the vehicle 6, so that the entire storage box 3 is located below the floor plate 7 of the vehicle 6. Will be deployed. The opening 3a is provided to be freely opened and closed by an opening / closing lid 3b.

  The slide frame 4 is provided with rollers 8 and pinion gears 9 that are separated from each other on the left and right side surfaces of the slide frame 4 so as to protrude from the side surfaces, and the rack gears 10 are formed on the bottom surfaces of the left and right side walls of the storage case 3. A rail 11 is provided, the roller 8 is connected to the upper surface of the guide rail 11, the pinion gear 9 is engaged with a rack gear 10 formed on the lower surface of the guide rail 11, and the pinion gear 9 is provided on the slide frame 4. The driving mechanism 12 is configured to transmit the rotation of the driving machine 12a to the output shaft 12c through the speed reduction mechanism 12b, and the pinion gear 9 is attached to the tip of the output shaft 12c. The slide frame 4 is moved in the rotational direction of the pinion gear 9 along the guide rail 11 by the rotation of the driving mechanism 12. And in the state which the slide frame 4 moved to the opening part 3a side of the storage box 3 like the position shown in FIG.1 and FIG.2, the platform 5 is drawn out from the storage box 3, and is supported. The platform 5 includes a main platform 5a and a sub-platform 5b. The main platform 5a is provided with a front flapper 13 at the front end, and the sub-platform 5b is provided with a rear flapper 14 at the rear end. Further, the main platform 5a is provided with undulating side guards 15, 15.

  As shown in FIGS. 1 and 2, when the slide frame 4 is stored and moved from the extended state into the storage box 3, the platform 5 rotates and lays down the rear flapper 14 as shown by the provisional line. Fold on the sub-platform 5b, then move the rear flapper 14 and the sub-platform 5b to the main platform 5a to reduce the front and rear length of the platform 5, and the side guards 15 and 15 are also shown as temporary lines, Lay down on the main platform 5a, and then, for example, with the mechanism proposed by the present applicant in Japanese Patent Application Laid-Open No. 2005-59635, the front flapper 13 is overturned, and then the slide frame 4 is moved to store the platform 5 To do.

  As shown in the figure, the slide frame 4 is provided with side end bearing plates 16, 16 on the left and right side wall surfaces, and the side end bearing plates 16, 16 are bearings that protrude rearward from the rear edge 4 a of the slide frame 4. Portions 16a and 16a are formed, and upper bearing holes 17 and 17 are formed in the upper portions of the bearing portions 16a and 16a.

  The driving arm tuning shaft 19 is integrally provided with the driving arms 18 and 18 welded to the left and right ends, and the shaft portions 19a and 19a at both ends are fitted into the upper bearing holes 17 and 17 so as to be rotatably supported. Is done.

  The driving arm tuning shaft 19 is provided with a pair of parallel connecting arms 20 and 20 near the left and right ends, and is installed on the slide frame 4 on support shafts 21 and 21 that are extended to the respective ends and integrally provided. The cylinder power units 22 and 22 to be deployed are connected.

  The driving arm tuning shaft 19 is supported by a deflection suppressing guide 23 having a center disposed on the back surface of the slide frame 4.

  The cylinder power units 22 and 22 use hydraulic pressure as a power source, and the front ends of the cylinders 22a and 22a are supported by the slide frame 4 by support shafts 24 and 24, and project from the rear ends of the cylinders 22a and 22a. , 22b are connected to the support shafts 21 and 21 of the connecting arms 20 and 20, respectively.

  The deflection suppressing guide 23 includes a bearing portion 23a and a mounting plate portion 23b. The bearing portion 23a has a bearing hole 25, and a dry bearing bush 26 is press-fitted into the inner surface. It is fixed to the slide frame 4 with bolts 27 for ease of assembly and maintenance.

  The center portion 19c supported by the deflection restraining guide 23 of the driving arm tuning shaft 19 is a solid shaft for accuracy and ease of assembly, and fitting projections 19c1 and 19c1 are formed on both outer ends, respectively. After fitting and pinching the inner ends of the tubular shaft portions 19b, 19b welded to the arms 18, 18, the outer peripheral surfaces of both are connected by the welded portions 28, 28 to form an integral structure.

  The slide frame 4 corresponds to the deflection suppressing guide 23. As shown in FIGS. 3 and 4, a rear angle frame 29 is welded to the inside of the upper surface portion and the rear surface portion, and the slide frame 4 and The mounting portion of the upper bolt 27 is reinforced. In addition, the rear flat plate 30 is welded to the inside of the lower portion of the back surface portion of the slide frame 4, and the mounting portion of the lower bolt 27 is reinforced.

  As shown in FIGS. 3 and 4, the slide frame 4 has a front angle frame 31 welded to the inside of the upper surface portion and the front surface portion, and a center between the front angle frame 31 and the rear angle frame 29. A frame 32 is passed and welded, and a U-shaped squirrel frame 33 is welded between the rear flat plate 30 and the center frame 32 to attach the slide frame 4 and the upper bolts 27 on the center portion. The attachment part of the bolt 27 of the lower part and the lower part is reinforced.

  The underfloor retractable vehicular lifting apparatus of the present invention achieves a compact apparatus capable of utilizing the underfloor space of the vehicle, and improves the smoothness of operation and the durability of the apparatus required in the fields of rescue and nursing care. The low cost can be achieved.

DESCRIPTION OF SYMBOLS 1 Underfloor retractable vehicle raising / lowering device 2 Driving arm tuning shaft deflection control device 3 Storage box 3a Opening 3b Opening / closing lid 4 Slide frame 4a Rear edge 5 Platform 5a Main platform 5b Subplatform 6 Vehicle 6a Entrance / exit 7 Floor plate 8 Roller 9 Pinion gear 10 Rack gear 11 Guide rail 12 Driving mechanism 12a Motor 12b Reduction mechanism 12c Output shaft 13 Front flapper 14 Rear flapper 15 Side guard 16 Side end bearing plate 16a Bearing portion 17 Upper bearing hole 18 Driving arm 19 Driving arm tuning shaft 19a Shaft portion 19b Tubular shaft portion 19c Center portion 19c1 Fitting protrusion 20 Linking arm 21 Support shaft 22 Cylinder power unit 22a Cylinder 22b Piston rod 22b1 Part 23 deflection suppressing guide 23a bearing portion 23b attachment plate portion 24 shaft 25 bearing hole 26 dry bearing bush 27 volts after 28 welded portion 29 rear angle frame 30 side flat plate 31 front angle frame 32 center frame 33 U-shaped Kasagui frame

Claims (3)

  A storage box whose outer shape is formed in a square shape, the opening is aligned with the entrance of the vehicle, and is entirely provided outside the vehicle floor, and a slide that is provided in the storage box and reciprocates toward the opening. In an underfloor retractable vehicle lifting device composed of a frame and a platform connected to and supported by the slide frame, going in and out of the storage box, and lifted and lowered by a power unit arranged on the slide frame outside the storage box. It is passed to the side end bearing plates that constitute the left and right side wall surfaces of the slide frame and is rotatably supported. The arm is connected to the side of the left and right ends. The center part of the driving arm tuning shaft that is provided integrally on the left and right ends of the driving arm is arranged on the slide frame. Deflection device for suppressing the driving arm tuning shaft in rotatably supported by the underfloor storage type vehicle lifting device comprising a guide suppressed.   The deflection suppressing guide is provided with a bearing portion and a mounting plate portion. A bearing hole is formed in the bearing portion, a dry bearing bush is press-fitted into the inner surface of the bearing hole, and the slide frame is fixed with bolts. The deflection suppression apparatus of the driving arm tuning shaft in the underfloor retractable vehicle lifting apparatus according to claim 1.   The corresponding portion of the driving arm tuning shaft corresponding to the deflection suppressing guide is provided by a solid metal shaft material in which fitting protrusions are formed at both outer ends, and the driving arm is welded to the end portion of the tubular shaft portion. 2. The apparatus for suppressing deflection of a driving arm tuning shaft in an underfloor retractable vehicle lifting apparatus according to claim 1, wherein a fitting projection of the solid metal shaft material is fitted to an inner end, and both are integrally welded.

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