JP3204753U - Railroad vehicle turning device - Google Patents

Abstract

An object of the present invention is to provide a rolling gear rolling device that does not cause unnatural stress on a connecting portion between a lower end portion of a lifting jack and a turntable or a piston rod even when a plurality of lifting jacks are out of synchronization and tilted and the turntable tilts. I will provide a. A rolling device 4 for a track-and-rail vehicle has three or more lifting jacks 41 and a turntable type rolling table 45, and a large-diameter bulging portion 44 is provided at a lower end portion of each lifting jack. On the other hand, the upper surface of the turntable is provided with a gap that allows each large-diameter bulging portion to be displaced upwards, and that each large-diameter bulging portion can be displaced by a minute range in the front-rear, left-right, and upper-lower directions. By providing the engagement receiving portion 48 to be connected in the state of being connected, even if the up-and-down jacks 41 are out of synchronization and out of order and the turntable 45 is inclined, the connecting portion between the lower end of the lift jack and the turntable and the piston The rod 43 is prevented from generating unnatural stress. [Selection] Figure 3

Description

  The present invention relates to a track-and-rail vehicle including a tire wheel for road traveling and an iron wheel for track traveling on a vehicle body, and further including a turning device used when the vehicle is switched between the road and the track. .

  This type of track-and-rail vehicle includes a rolling device that can float the vehicle and support the vehicle so that the vehicle can turn horizontally when the vehicle is floating. The rolling device includes a plurality of lifts fixed to the vehicle body. A turntable type turntable is attached to each lower end portion of a jack (hydraulic jack). Incidentally, at least a pair (two) of lifting jacks of the rolling device is basically provided in the left-right direction of the vehicle body.

  The rolling device for a railroad vehicle is installed near the center of gravity of the vehicle, but below the vicinity of the center of gravity of the vehicle is a structure (various equipment) that obstructs the placement of a lifting jack. is there. And in the thing where the above-mentioned structure which becomes the obstacle of the raising / lowering jack arrangement is installed near the center of gravity position of the vehicle, the raising / lowering jack is arranged at each position straddling the structure (vehicle center of gravity position) forward and backward. Yes. In this case, it is necessary to use three or more lifting jacks. In many cases, lifting jacks are provided at four positions of each vertex of the quadrangle. In addition, as a rolling device which supported the turntable with four raising / lowering jacks, there exist some which are shown by Unexamined-Japanese-Patent No. 2006-248482 (patent document 1), for example.

  FIG. 4 shows a conventional general rolling device 4, and each lifting jack 41, 41 of the rolling device 4 employs a hydraulic cylinder in which a piston rod 43 protrudes and retracts with respect to a cylinder tube 42. ing. In the rolling device 4 of FIG. 4 (conventional example), each of the lifting jacks 41 and 41 is fixed to the vehicle body 10 in a state in which the posture cannot be changed, while the lower end portion of each lifting jack 41 (piston rod 43). ) 43a is firmly fixed to the upper surface of the turntable 45 (for example, by welding).

  By the way, in the rolling device 4 shown in FIG. 4, it is ideal that the lifting jacks 41, 41 are synchronously expanded and contracted (expanded at the same speed) during the lifting operation of the rolling table 45, but in the lifting jack 41 made of a hydraulic cylinder, It is difficult to accurately synchronize and expand multiple lines.

  In the rolling device 4 of FIG. 4, when the synchronous expansion / contraction of both the lifting jacks 41, 41 is out of order (the expansion / contraction amount of both lifting jacks is different), the rolling table 45 is inclined as indicated by reference numeral 45 ′. In FIG. 4, the tilted state of the turntable (reference numeral 45 ') is shown with an exaggerated inclination angle to facilitate understanding of the problem.

JP 2006-248482 A

  By the way, in the rolling device 4 of the conventional example (FIG. 4), the lower end portions (piston rod lower end portion 43a) of the lifting jacks 41 and 41 are firmly fixed (for example, welded) to the rolling table 45. Thus, when the synchronous expansion / contraction of both the lifting jacks 41, 41 is out of order and the turntable 45 is inclined (reference numeral 45 '), the lower ends 43a', 43a 'of the piston rods 43', 43 'and the turntable 45' A stress that twists at the connecting portion is generated, and a stress that is bent (tilted) with respect to the piston rod 43 ′ is generated.

  When the turntable tilts as described above (reference numeral 45 '), when a stress occurs in the connecting portion between the piston rod lower end 43a' and the turntable 45 ', the connecting portion is peeled off. On the other hand, when a bending stress is generated on the piston rod 43 ', when the lifting jacks 41 and 41 expand and contract, the lifting jacks 41 and 41 have strength and operability. Hazardous problems will occur.

  Therefore, in view of the problems of the conventional rolling device described above (FIG. 4), the present invention can be connected to the lower end portion of each lifting jack even if the rolling table is inclined due to the synchronous expansion and contraction of the plurality of lifting jacks. The object of the present invention is to provide a rolling device for a railroad vehicle in which unnatural stress is not generated in a connecting portion with a chassis or a piston rod of each lifting jack.

  The present invention has the following configuration as means for solving the above problems. The present invention relates to a track-and-rail vehicle having a vehicle body having tire wheels for road traveling and iron wheels for track traveling so that the vehicle can be levitated and supported so that the vehicle can be turned horizontally in the levitating state. It is intended for equipment.

  And the rolling device of the track-and-rail vehicle of this invention has three or more raising / lowering jacks fixed to the vehicle body, and the turntable type turntable supported by the lower end part of each raising / lowering jack, Each said raising / lowering jack Each of the large-diameter engaging portions is provided at the lower end of each of the wheels, while the large-diameter engaging portions cannot be pulled out upward on the upper surface of the wheel base. It is characterized in that there is provided an engagement receiving portion that connects the front and rear, left and right, and top and bottom with a gap that can be displaced by a minute range.

  The number of lifting jacks used in the rolling device of the present invention is suitably 3-4, but in the case of 3, the number of lifting jacks is provided at each vertex position (three locations) of the triangle in plan view. In this case, it may be provided at each vertex position (four locations) of the quadrangle in plan view. In the case where three or more lifting jacks are used, even if there is a structure (various equipment) that obstructs the installation of the lifting jack in the vicinity of the center of gravity of the vehicle, By attaching the lifting jack, the turning device can be installed near the center of gravity of the vehicle.

  Each lifting jack uses a hydraulic cylinder in which the piston rod protrudes and retracts with respect to the cylinder tube. However, in the lifting jack using a hydraulic cylinder, each lifting jack is synchronized even if hydraulic oil is supplied to multiple units at the same time. It is difficult to expand and contract (expand and contract at the same speed). And as explained in the section of “Background Art” above, if the plurality of lifting jacks do not expand and contract synchronously, the turntable tilts. However, as in the conventional case (FIG. 4), the lower end of each lifting jack is In the case where each is firmly fixed to the upper surface of the turntable, there arises a problem that unnatural stress is generated at the connecting portion between the lower end portion of the lifting jack and the turntable and the piston rod.

  Therefore, in the rolling device of the present invention, each lower end portion (large-diameter engaging portion) on each lifting jack side is displaced by a minute range in the front and rear, left and right, and top and bottom with respect to each engaging receiving portion on the rolling stand side. The front, rear, left, right, and top gaps are connected to the large-diameter bulge portion even when the turntable is tilted without synchronous expansion and contraction of the lifting jacks. The engagement receiving portion is not strongly pressed against. That is, even if the turntable tilts, the lower end portion (large-diameter bulge portion) of each lifting jack and the engagement receiving portion on the turntable side can be relatively displaced within the gap, so the large-diameter bulge portion And the engagement receiving portion are not pressed against each other.

  In the rolling device of the present invention, as described above, the large-diameter bulging portions at the lower end portions of the lifting jacks are displaced by a small range in the front and rear, left and right, and up and down with respect to the respective engagement receiving portions on the rolling table side. It is connected in a state where a gap is obtained.

  In the rolling device of the present invention, even if each lifting jack is not synchronously expanded and contracted and the rolling table tilts, the large-diameter bulging portion on each lifting jack side and the engagement receiving portion on the rolling table side have the above clearance. Since relative displacement is possible within the range, no unnatural (damaged) stress is generated in the connecting portion between the large-diameter bulging portion and the engagement receiving portion or the piston rod of the lifting jack.

  Therefore, in the rolling device of the present invention, even if the turntable is inclined, no unnatural stress is generated in the connecting portion between the large-diameter bulging portion and the engagement receiving portion. There is an effect that the peeling action does not occur, and an unnatural stress is not generated on the piston rod, and therefore, there is an effect that a harmful problem in terms of strength and operability does not occur in the lifting jack.

It is a side view of a track-and-rail vehicle provided with the rolling device of the example of the present application. It is a schematic plan view of the track-and-rail vehicle of FIG. It is function explanatory drawing of the rolling device of an Example of this application. It is explanatory drawing of the problem of the conventional rolling device.

  Referring to FIG. 1 to FIG. 3, the rolling device for a railroad vehicle according to an embodiment of the present application will be described. The railroad vehicle of FIG. 1 and FIG. 2 includes a vehicle body 10 and tire wheels 12 (front and rear, left and right four wheels). ), Iron wheels 31 for traveling on the track (front and rear, left and right four wheels), and a rolling device 4 that can support the vehicle 1 as a whole.

  In the embodiment shown in FIGS. 1 and 2, an aerial work vehicle in which an aerial work machine 2 is mounted on a vehicle body 10 (left and right chassis frames 11, 11) is used as a track-rail vehicle. In addition to the aerial work vehicle shown in the figure, a dump truck, a crane work vehicle, or the like can be employed as the rail vehicle.

  The rolling device 4 is installed in the vicinity of the center of gravity G of the vehicle 1. The rolling device 4 includes a total of four elevating jacks 41, 41... Fixed to the vehicle body 10, and a turntable type supported by each lower end portion of each elevating jack 41 (supported at four points). A turntable 45 is included.

  By the way, the rolling device 4 supports the vehicle 1 in the vicinity of the vehicle center of gravity position G, and there is a structure (equipment) 7 that obstructs the installation of the lifting jack on the lower surface of the vehicle body near the vehicle center of gravity position G. In that case, the front and rear lifting jacks 41, 41 are installed at positions straddling the structure 7 back and forth. Thus, even when there is a structure 7 that hinders the installation of the lifting jack on the lower surface of the vehicle body near the vehicle center of gravity G, the lifting jacks 41 and 41 are installed across the structure 7 in the front-rear direction. Thus, the rolling device 4 can be installed in the vicinity of the vehicle center-of-gravity position G.

  In this embodiment, four lifting jacks 41, 41,... Are used. However, as shown in FIG. 2, the left and right lifting jacks on the front side are respectively connected to the outer surfaces of the chassis frames 11, 11. On the other hand, the two right and left lifting jacks on the rear side are fixed to the inner surfaces of the chassis frames 11 and 11, respectively.

  A hydraulic cylinder is used for each of the lifting jacks 4, 41. Each of the lifting jacks 41 is used with the cylinder tube 42 fixed to the chassis frame 11 in a state where the piston rod 43 protrudes and retracts downward with respect to the cylinder tube 42 as shown in an enlarged view in FIG. Yes. Each of the lifting jacks 41, 41,... Is fixed so as not to be tilted with a posture facing in the vertical direction.

  As shown in FIG. 3, a bowl-shaped large-diameter bulging portion 44 is provided at the lower end portion of the elevating jack 41 (lower end portion of the piston rod 43). The large-diameter bulging portion 44 is formed in a circular plate shape having a larger diameter than the outer diameter of the piston rod 43.

  The turntable 45 is obtained by assembling a lower grounding board 47 to a base 46 on the upper side so as to be horizontally rotatable.

  The upper end of the turntable 45 (the upper surface of the base 46) is located at a position corresponding to the lower end of each of the four lifting jacks 41, 41,. Engagement receiving portions 48 for engaging 44 are fixed.

  As shown in FIG. 3, each of the engagement receiving portions 48, 48,... Is formed of a hollow body that covers the outer peripheral surface and upper and lower surfaces of the large-diameter bulged portion 44. A hole 48 a through which the piston rod 43 is inserted is provided on the upper surface side of the engagement receiving portion 48.

  When the large-diameter bulging portion 44 at the lower end of the piston rod is accommodated in the hollow portion 49 of the engagement receiving portion 48, the large-diameter bulging portion 44 cannot be pulled out upward from the engagement receiving portion 48. ing. That is, since the outer diameter of the large-diameter bulging portion 44 is larger than the inner diameter of the hole 48a on the upper surface of the engagement receiving portion 48, the large-diameter bulging portion 44 is engaged with the engagement receiving portion when the piston rod 43 moves upward. The large diameter bulging portion 44 is prevented from coming out upward from the engagement receiving portion 48 by abutting against the ceiling surface of the hollow portion 49 of the portion 48.

  The large-diameter bulging portion 44 at the lower end of the piston rod is connected to the hollow portion 49 of the engagement receiving portion 48 with a gap S that can be displaced by a minute range in the front and rear, left and right, and up and down. Yes. When the turntable 45 is inclined (reference numeral 45 'in FIG. 3), the gap S is such that the inner surface of the hollow portion 49 of each engagement receiving portion 48 on the turntable 45 side is the large-diameter bulging portion 44 on the lifting jack 41 side. This is for avoiding strong pressure contact.

  The rolling device 4 of this embodiment is used as follows. That is, when each of the lifting jacks 41, 41,... Is extended in a state where the vehicle 1 has entered a predetermined position within the railroad crossing, after the turntable 45 is grounded, it is lowered to the position 45 ″ in FIG. It is possible to support the vehicle 1 in a state where the vehicle 1 is levitated from the ground by moving the iron wheel 31 to the use position (position 31 ') in the levitated state, and then horizontally turning the vehicle by turning the vehicle horizontally. After the iron wheels 31 'are made to correspond to the respective track rails (not shown), each of the iron wheels 31' can be placed on the track rails (by being able to run on the track) by reducing each lifting jack 41.

  The lower end portions (large-diameter bulging portions 44) of the elevating jacks 41, 41,... And the respective engagement receiving portions 48 on the side of the turntable 45 are connected via a minute gap S, respectively. Each of the connecting portions between the portion (large diameter bulging portion 44) and the engagement receiving portion 48 has a rattle, but each of the lifting jacks 41, 41,... In the case of the book, they are connected at three places), so that the stable posture can be maintained both in the floating support state of the turntable 45 and in the vehicle lift support state in which the turntable 45 is installed.

  By the way, even if a plurality of lifting jacks 41, 41,... Are expanded and contracted simultaneously, the lifting jacks 41, 41,... May not be synchronously expanded or contracted (expanded at the same speed). As shown by reference numeral 45 'in FIG. 3 shows a state in which the turntable tilts (reference numeral 45 ') indicates a case where the turntable tilts downward toward the rear of the vehicle. The tilting direction of the turntable 45 depends on the expansion and contraction of the lifting jacks 41, 41,. It varies depending on the degree (the turntable 45 may tilt downward, tilt left or right, or tilt diagonally).

  When the turntable 45 is inclined (reference numeral 45 'in FIG. 3), the lower end portion (large-diameter bulging portion 44) on the lifting jack 41 side and the engagement receiving portion 48 on the turntable 45 side are firmly fixed. If it is, as described in the section of "Background Art" above, stress that twists at the connecting portion between each piston rod lower end and the turntable and stress that bends against the piston rod occurs. In the rolling device 4 of this embodiment, the lower end portions (large-diameter engaging portions 44) on the respective lifting jacks 41 side are respectively front and rear, left and right, and upper and lower with respect to the respective engagement receiving portions 45 on the rolling table 45 side. Since they are connected with a gap S that can be displaced by a minute range, when the turntable 45 is inclined (reference numeral 45 '), the large-diameter bulging portion 44' at the lower end of the piston rod and the turntable side Relative to the engagement receiving portion 48 ′ within the gap S.

  Therefore, in the rolling device 4 of this embodiment, even if the rolling table 45 is inclined (reference numeral 45 ') as described above, the lower end portion (large-diameter bulging portion 44) of each lifting jack 41 and the rolling table 45 No stress that twists the connecting portion with the engagement receiving portion 48, stress that bends the piston rod 43, or the like is generated (the connecting portion is not peeled off, or a harmful problem with respect to each lifting jack 41 does not occur). It has a function.

  1 is a vehicle, 4 is a rolling device, 10 is a vehicle body, 11 is a chassis frame, 12 is a tire wheel, 31 is a steel wheel, 41 is a lifting jack, 42 is a cylinder tube, 43 is a piston rod, 44 is a large-diameter bulge , 45 is a turntable, 48 is an engagement receiving portion, 49 is a hollow portion, and S is a gap.

And the rolling device of the track-and-rail vehicle of this invention has three or more raising / lowering jacks fixed to the vehicle body, and the turntable type turntable supported by the lower end part of each raising / lowering jack, Each said raising / lowering jack Each of the large-diameter bulges is provided on the upper surface of the turntable while the large-diameter bulges cannot be pulled upward. It is characterized in that there is provided an engagement receiving portion that connects the front and rear, left and right, and top and bottom with a gap that can be displaced by a minute range.

Therefore, in the rolling device according to the present invention, each lower end portion ( large-diameter bulging portion ) on each lifting jack side is displaced by a small range in the front and rear, left and right, and top and bottom with respect to each engagement receiving portion on the rolling stand side. The front, rear, left, right, and top gaps are connected to the large-diameter bulge portion even when the turntable is tilted without synchronous expansion and contraction of the lifting jacks. The engagement receiving portion is not strongly pressed against. That is, even if the turntable tilts, the lower end portion (large-diameter bulge portion) of each lifting jack and the engagement receiving portion on the turntable side can be relatively displaced within the gap, so the large-diameter bulge portion And the engagement receiving portion are not pressed against each other.

When the turntable 45 is inclined (reference numeral 45 'in FIG. 3), the lower end portion (large-diameter bulging portion 44) on the lifting jack 41 side and the engagement receiving portion 48 on the turntable 45 side are firmly fixed. If it is, as described in the section of "Background Art" above, stress that twists at the connecting portion between each piston rod lower end and the turntable and stress that bends against the piston rod occurs. In the rolling device 4 of this embodiment, the lower end portions ( large-diameter bulging portions 44) on the respective lifting jacks 41 side are respectively front and rear, left and right, and upper and lower with respect to the respective engagement receiving portions 45 on the rolling table 45 side. Since they are connected with a gap S that can be displaced by a minute range, when the turntable 45 is inclined (reference numeral 45 '), the large-diameter bulging portion 44' at the lower end of the piston rod and the turntable side Relative to the engagement receiving portion 48 ′ within the gap S.

Claims (1)

A rolling device in which a vehicle is levitated with a tire wheel for road running and an iron wheel for track running on a vehicle body, and the vehicle can be supported so that the vehicle can turn horizontally in a vehicle levitating state. ,
Having three or more lifting jacks fixed to the vehicle body and a turntable type turntable supported at the lower end of each lifting jack;
While providing a large-diameter engaging portion at the lower end of each lifting jack,
On the upper surface of the turntable, there are gaps that can displace the large-diameter engaging portions in a state in which the large-diameter engaging portions cannot be pulled upward, and can displace the large-diameter bulging portions by a minute range in the front-rear direction, the left-right direction, and the vertical direction. An engagement receiving portion is provided for connection in an interposed state.
A rolling device for a track and land vehicle characterized by the above.

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