JP2019157985A - Traveling device - Google Patents

Abstract

To provide a traveling device which stops rotation of a rotor directly attached to an axle and can normally operate the rotor while improving durability even when a wheel load is heavy.SOLUTION: A traveling device 1 includes a plurality of wheels 2 rotated in the same direction and a plurality of axles 3 of which one end part is projected from the wheel 2 and a plurality of rotors (brake device 8) connected to one end part of the axle 3, the rotor applying at least one side of a driving force and a braking force to the axle 3. Therein, one end part in Y direction of each of the plurality of rotors and a connection member 11 constituted with a plate of which the face vertical direction faces Y direction are joined, and one end part of each the plurality of rotors is connected to each other by means of the connection member 11. The connection member 11 is constituted such that areas among the plurality of rotors themselves are freely deformable in accordance with displacement of each of rotors by means of displacement of axles 3.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a traveling device for cargo handling equipment such as a quay crane, and more particularly, to prevent a rotating body that transmits torque around an axle shaft such as a brake device or a speed reducer directly attached to the axle. The present invention relates to a traveling device that operates the rotating body normally.

  A cargo handling device such as a quay crane (container crane or unloader) is provided with a traveling device for traveling the cargo handling device. With regard to this traveling device, a torque arm is attached to each of the rotating bodies that transmit torque around the axle shaft of the adjacent gear motor housing or speed reducer, and the attached torque arms are tightened together with bolts, It is known that the rotation of the torque arm is limited by canceling out the respective rotational reaction forces (see, for example, paragraph [0004] of Patent Document 1).

JP 2014-134220 A

  By the way, in the quay crane traveling device, it is often used to attach the brake device directly to the axle because of the installation space. However, when the brake device is directly attached to the axle, there is a problem that the center of the brake device is displaced due to elastic deformation of the axle due to wheel load. When the center of the brake device is displaced, the bearing in the brake device and the axle are supported. Overload is applied to the bearing (bearing housing), which is not preferable. In addition, when the brake device is a wet multi-plate type disc brake, if the axis of the axle (brake shaft) is displaced relative to the housing of the brake device, the brake rotor and the brake pad will be displaced and the brake rotor will be displaced. As a result, the brake pads are not properly pressed. Therefore, conventionally, like the torque arm attached to the case of the gear motor described in Patent Document 1, the torque arm is attached to the brake device to eliminate the deviation of the axis of the brake device.

  However, since an excessive load due to the elastic deformation of the axle is applied to the torque arm, in order to reduce the load applied to the torque arm due to the elastic deformation of the axle, a certain amount is applied to the torque arm and the joint between the torque arm and the rotating body. It is necessary to provide looseness (a loosening gap where the torque arm can move excessively in the axial direction of the axle). Therefore, in the drive device described in Patent Document 1, a certain amount of backlash is provided by loosely fitting both the first arm member and the second arm member to the bracket (for example, see FIG. 2 of Patent Document 1). . However, this play causes fretting wear, which has been a cause of a decrease in durability.

  The present invention has been made in view of the above situation, and its purpose is to prevent rotation of a rotating body directly attached to an axle while improving durability even when the wheel load is heavy, An object of the present invention is to provide a traveling device capable of operating the rotating body normally.

  A traveling device of the present invention for achieving the above object includes a plurality of wheels arranged side by side in the traveling direction and rotating in the same direction, and one end portion from the wheel in a state of being inserted into each wheel. And a plurality of rotating bodies connected to one end of each of the axles, and the rotating body applies at least one of a driving force and a braking force to the axle. In the travel device configured as described above, the travel device includes a connection member configured by a plate whose vertical direction faces the axial direction of the axle, and the connection member is provided in each of the plurality of rotating bodies in the axial direction of the axle. The plurality of rotating bodies are joined to one end portion of both end portions to connect the plurality of rotating bodies, and a region between the plurality of rotating bodies of the connecting member is caused by displacement of the plurality of axles. According to each displacement of Wherein the form is freely. The rotating body is a device that applies at least one of a driving force and a braking force to the axle, and the rotating body includes a braking device, a driving device including a reduction gear and a motor, a braking device, a reduction gear, and The drive device with a brake comprised with a motor is illustrated.

  According to the present invention, the connecting member is formed by connecting one end of each of the plurality of rotating bodies in the axial direction of the axle by the connecting member formed of a plate whose surface vertical direction faces the axial direction of the axle. Loads in the rotational direction of the axle transmitted from the multiple rotating bodies to the connecting member in the non-contact state with the structure of the cargo handling equipment excluding the rotating body are opposite in the region between the rotating bodies of the connecting member Can be counteracted by acting on each other. Therefore, each rotating body can be prevented from rotating by the connecting member, and each rotating body can be operated normally. Furthermore, the region between the plurality of rotating bodies of the connecting member can be deformed in accordance with the displacement of each of the plurality of rotating bodies due to the displacement of the plurality of axles. The displacement of each of the plurality of rotating bodies due to the displacement of the axle (elastic deformation or the like) can be absorbed. Thereby, generation | occurrence | production of fretting wear by providing backlash can be avoided, and the improvement of durability of a traveling apparatus can be aimed at.

It is explanatory drawing which illustrates typically embodiment of the traveling apparatus of this invention by a side view. It is A arrow directional view of FIG. It is a B arrow line view of FIG. It is explanatory drawing which illustrates typically the state in which the connection member is deform | transforming with the elastic deformation of the axle of the traveling apparatus of FIG. It is explanatory drawing which illustrates typically the state which the connection member is deform | transforming with the elastic deformation of the axle shaft of the traveling apparatus of FIG. It is explanatory drawing which illustrates typically the load (moment) of the rotation direction of the axle shaft transmitted to the connection member from two rotary bodies of the traveling apparatus of FIG. It is C arrow line view of FIG. It is explanatory drawing which illustrates typically another embodiment of the traveling apparatus of this invention by planar view. It is explanatory drawing which illustrates typically the load of the rotation direction which the connection member which connects three rotary bodies receives.

  Hereinafter, a traveling device of the present invention will be described based on the embodiments shown in the drawings.

  As shown in FIG. 1, the traveling device 1 of the present invention is mounted on a cargo handling device 20. In the drawing, the X direction indicates the traveling direction of the cargo handling device 20, the Y direction indicates the axial direction of the axle 3 orthogonal to the X direction in the horizontal direction, and the Z direction indicates the vertical direction (vertical direction).

  The cargo handling equipment 20 is exemplified by a rail-mounted crane, and the traveling device 1 is installed at the lower end of the cargo handling equipment 20 and is exemplified by an apparatus that rolls the wheels 2 on the rail R and travels the cargo handling equipment 20. Is done. The left traveling device 1 in FIG. 1 is constituted by a driving type traveling device 1 having a driving device 5, and the right traveling device 1 in FIG. 1 is constituted by a driven type traveling device 1 having no driving device 5. Has been. Hereinafter, the driving type traveling device 1 will be described first, and the driven type traveling device 1 will be described later.

  As shown in FIG. 2 and FIG. 3, the traveling device 1 according to the embodiment of the present invention includes a wheel 2, an axle 3, a drive device 5, and a brake device 8 as a rotating body. There are multiple. The rotating body is a device that applies at least one of a driving force and a braking force to the axle 2, and the rotating body includes a braking device 8, a driving device including a reduction gear and a motor, a braking device, and a reduction gear. And a brake-equipped drive device composed of a motor. In this embodiment, a case where the rotating body is the brake device 8 is illustrated.

  The wheels 2 are arranged side by side in the X direction of the cargo handling device 20 and rotate in the same direction. Although the wheel 2 of this embodiment is configured by a metal wheel that travels on the rail R, the wheel 2 can also be configured by a rubber tire that travels on the ground.

  Both ends of the axle 3 protrude from the wheel 2 in a state of being inserted through the wheel 2 in the Y direction. The axle 3 is pivotally supported by a bearing portion 4 (bearing housing) of a bogie 24 whose both ends are rotatably connected to an equalizer 22 via a bogie pin 23, and both ends in the Y direction from the bearing portion 4. It protrudes. A drive device 5 is connected to one end portion of both end portions protruding from the bearing portion 4 of the axle 3, and a brake device 8 is connected to the other end portion.

  The drive device 5 includes a motor 6 and a speed reducer 7 that transmits the rotation of the motor 6 to the axle 3. The driving device 5 is fixed to the structure 21 via a fixing member (torque arm) 13 so as not to rotate around the axle 3.

  In this embodiment, one drive device 5 is provided for each axle 3, but a configuration in which a plurality of axles 3 are rotationally driven by a common drive device 5 may be employed. The driving device 5 only needs to apply driving force to the axle 3 to rotate the axle 3. As the drive device 5, the motor 6 can be constituted by an engine, and the speed reducer 7 can be constituted by a transmission.

  The brake device 8 of this embodiment is configured by a wet multi-plate disc brake. The brake device 8 only needs to apply a braking force to the axle 3 to stop the rotation of the axle 3. As the brake device 8, for example, a dry disc brake, a band brake, a magnetorheological fluid brake (MR fluid brake), or the like can also be employed.

  The brake device 8 includes a disc-shaped brake rotor joined to one end portion (brake shaft 9) of the axle 3, a brake pad pressed against the brake rotor, and a brake caliper that presses the brake pad against the brake rotor. It is configured.

  In the traveling device 1 of this embodiment, two sets of units each including the wheel 2, the axle 3, the bearing portion 4, the drive device 5, and the brake device 8 are installed apart from each other in the X direction with respect to one bogie 24. ing. And the one end part of each Y direction of the two brake devices 8 which are provided in the same bogie 24 and adjoin to the X direction is connected by the one connection member 11. As shown in FIG.

  The connecting member 11 is composed of a plate whose surface vertical direction (direction perpendicular to the plate surface) is oriented in the Y direction. The connecting member 11 is joined to one end portion of both end portions in the Y direction of each of the plurality of brake devices 8 (rotating bodies) to connect the plurality of brake devices 8. One end of each brake device 8 and the connecting member 11 are joined in a state of being in contact with each other by, for example, a plurality of detachable joining members 12. Examples of the joining member 12 include bolts and nuts, screws, screws, and the like.

  In this embodiment, the connecting member 11 is joined to the end surfaces of the two brake devices 8 facing the opposite sides of the wheels 2. The connecting member 11 is not joined to any part other than the brake device 8 in a non-contact state with the structure 21 (the housing of the equalizer 22, the housing 24a of the bogie 24, etc.) of the cargo handling device 20 excluding the brake device 8. In the traveling device 1, the plurality of brake devices 8 are connected to each other by the connecting member 11, thereby preventing the rotation of each brake device 8 with respect to the structural body 21 (housing 24 a).

  As illustrated in FIG. 1, the connecting member 11 of this embodiment has a shape in which each of the plurality of brake devices 8 is accommodated inside the outer edge as viewed in the Y direction. In other words, as viewed in the Y direction, each of the plurality of axles 3 (brake shafts 9) is also located inside the outer edge of the connecting member 11. Furthermore, the area | region between the some brake devices 8 of the connection member 11 becomes a structure freely deformable according to each displacement of each brake device 8 by the displacement of each axle shaft 3. FIG.

  The configuration that can be deformed in accordance with the displacement of each brake device 8 of the connecting member 11, as illustrated in FIG. 4, when the axle 3 warps convexly upward in the Z direction as seen in the X direction. Following the inclination of the brake device 8 accompanying the warp of the axle 3, the connecting member 11 can be freely tilted. Specifically, the connecting member 11 is inclined with respect to the Z direction at a portion joined to one end portion on the outer side in the Y direction of the brake device 8. The warp of the axle 3 is caused by the Y-direction midway position of the axle 3 being distorted upward in the Z direction by the wheels 2 receiving the weight of the cargo handling device 20 with respect to both ends in the Y direction.

  Further, in the configuration that can be deformed in accordance with the displacement of the brake device 8 of the connecting member 11, as shown in FIG. 5, the above-described warp magnitudes of the plurality of axles 3 are relative to each other when viewed in the Z direction. When the axles 3 are warped, the portion (region) between the brake devices 8 of the connecting member 11 in the Y direction or the torsional direction depends on the relative displacement in the Y direction of each brake device 8 accompanying the warp of the axle 3. It can be bent or bent. Specifically, the connecting member 11 is bent at an intermediate position in the Y direction, and is connected to a portion joined to the brake device 8 joined to the axle 3 having a small warp and a brake device 8 joined to the axle 3 having a large warp. The joined portion is displaced in the Y direction.

  More specifically, the connecting member 11 of this embodiment is composed of a single metal plate. As illustrated in FIG. 1, the connecting member 11 is formed in a rounded rectangular shape combining a rectangle and two semicircles when viewed in the Y direction. One end (end face) of each brake device 8 and the connecting member 11 are friction-joined by a plurality of bolts 12a and nuts 12b.

  The plurality of joining members 12 (bolts 12a and nuts 12b) are arranged at equal intervals on a circle centered on the axis of each axle 3 when viewed in the Y direction. That is, the joining positions (the fastening positions of the bolts 12 a) between the connecting member 11 and the brake device 8 by the joining member 12 are arranged at equal intervals in the circumferential direction of one end portion of the brake device 8.

  The shape and size of the connecting member 11 are not particularly limited, and can be appropriately determined according to the shape and size of the brake device 8. However, as in this embodiment, the connecting member 11 has a convex polygonal shape when viewed in the Y direction. Or the structure which forms an oval shape is desirable. In the present specification, the oval shape refers to a shape such as an egg shape, an oval shape, an elliptical shape, or a rounded rectangular shape that does not have a dent that is recessed from the outside toward the inside at the outer edge. Further, the convex polygonal shape includes a shape with rounded corners.

  The connecting member 11 is not limited to metal but can be formed of various materials such as resin, but is preferably formed of metal having both flexibility and durability, such as stainless steel and steel. The thickness of the connecting member 11 can be determined as appropriate, but the region between the plurality of brake devices 8 is set to a thickness that can be deformed.

  The connecting member 11 can be formed by combining a plurality of plates. However, it is preferable that the connecting member 11 is composed of a single plate in view of manufacturing cost and durability. When the connecting member 11 is formed of a plurality of plates, the plates may be joined together with metal fittings, an adhesive, welding, or the like in a state where parts of adjacent plates are stacked in the Y direction. The joining method of the connecting member 11 and the brake device 8 is not limited to the joining by the joining member 12, and the connecting member 11 and the brake device 8 can also be joined by an adhesive or welding.

  As described above, according to the traveling device 1 of the present invention, one end portion in the Y direction of each of the plurality of brake devices 8 (rotating bodies) by the connecting member 11 configured by a plate whose surface vertical direction faces the Y direction. By connecting the two, the connection member 11 is transmitted from the plurality of brake devices 8 to the connection member 11 as illustrated in FIG. 6 in a non-contact state with the structure 21 of the cargo handling device 20 excluding the brake device 8. The load M in the rotational direction of the axle 3 can be counteracted by acting in the opposite direction in the region between the plurality of brake devices 8 of the connecting member 11. Therefore, each brake device 8 can be prevented from rotating by the connecting member 11, and each brake device 8 can be operated normally. Since the load M in the rotational direction of the axle 3 transmitted from each brake device 8 to the connecting member 11 is applied and canceled in the opposite direction in the region between the brake devices 8 of the connecting member 11, the connecting member 11. There is no heavy load on the machine.

  Furthermore, in the present invention, the region between the plurality of brake devices 8 of the connecting member 11 is freely deformable in accordance with the displacement of each of the plurality of brake devices 8 due to the displacement of the plurality of axles 3, thereby reducing the backlash. Without providing, the connecting member 11 can absorb the displacement of each of the plurality of brake devices 8 due to the displacement (elastic deformation or the like) of the plurality of axles 3. Thereby, generation | occurrence | production of fretting wear by providing backlash can be avoided, and the improvement of the durability of the traveling apparatus 1 can be aimed at.

  Further, the connecting member 11 is deformed while maintaining the connection with each brake device 8 and absorbs the displacement of each brake device 8, so that the plurality of brake devices 8 connected by the connecting member 11 are respectively It is possible to displace following the displacement of the axle 3. Therefore, even when the axle 3 is elastically deformed due to wheel load, the load applied to the brake device 8 and the bearing 10 can be reduced, which is advantageous in suppressing the shift of the shaft center in the brake device 8. Moreover, since the structure of the traveling device 1 can be simplified in the present invention, there is also an advantage that the degree of freedom in designing the cargo handling equipment 20 is increased.

  Furthermore, in the present invention, the connecting member 11 is configured by a plate whose surface vertical direction faces the Y direction, so that the connecting member 11 has high rigidity in the rotation direction (YZ plane) of the load M transmitted from the brake device 8. In the Y direction, the rigidity is low. Thereby, the displacement of the brake device 8 can be effectively absorbed by the connecting member 11 being deformed flexibly in the Y direction or the torsional direction while stably connecting the brake devices 8.

  In many cases, in the cargo handling device 20, lubricating oil (grease) is periodically supplied between the axle 3 and the bearing 4 in order to reduce friction between the axle 3 and the bearing 4. In the traveling device 1, the brake device 8 is hardly affected by the lubricating oil by connecting the brake device 8 to one end of the axle 3. For this reason, the brake device 8 has an advantageous structure for stably braking the axle 3. If the brake device 8 is formed of a hermetic brake device such as a wet type multi-disc brake, the brake device 8 is not affected by the lubricating oil, so that it is more and more advantageous for stable braking of the axle 3. Become.

  If the connecting member 11 is formed of a single metal plate as in this embodiment, the connecting member 11 having excellent flexibility and durability can be manufactured at low cost with a small number of man-hours, thus reducing the equipment cost of the traveling device 1. Is advantageous. In the handling equipment 20 having a large size, a certain amount of manufacturing error occurs in the distance between the axles 3 and the like. However, if the connecting member 11 is composed of one metal plate, the connecting member 11 can be easily manufactured in a short period of time. Therefore, for example, it is possible to manufacture the connecting member 11 to the actual size after assembling the constituent members of the traveling device 1 (such as the axle 3 and the brake device 8) other than the connecting member 11 to the cargo handling device 20. Become.

  When the connecting member 11 is viewed in the Y direction so that each of the plurality of axles 3 is accommodated inside the outer edge of the connecting member 11, the load M in the rotational direction of each axle 3 of the plurality of brake devices 8 is increased. The transmission can be effectively transmitted to the connecting member 11 in a balanced manner, and the load M generated in the brake device 8 can be effectively canceled out in the connecting member 11 with a good balance. Therefore, it is advantageous to reduce the load applied to the brake device 8.

  Further, when the connecting member 11 is shaped so that each of the plurality of brake devices 8 is accommodated inside the outer edge when viewed in the Y direction, the rotation direction of the axle 3 transmitted from the plurality of brake devices 8 to the connecting member 11 is increased. Since the load M can be received in the entire region in the rotation direction, the load M in the rotation direction of each axle 3 of the plurality of brake devices 8 is effectively transmitted in a balanced manner by the connecting member 11, and more effective in the connecting member 11. Can be counterbalanced in a balanced manner. Therefore, it becomes more and more advantageous to reduce the load applied to the brake device 8.

  When the connecting member 11 is formed in a shape having a recess formed in the outer edge from the outside to the inside as viewed in the Y direction, the load M transmitted from the brake device 8 may concentrate on the recess. On the other hand, when the connecting member 11 has a convex polygonal shape or an oval shape as viewed in the Y direction as in this embodiment, such concentration of the load M can be avoided. Therefore, it is advantageous to avoid buckling and breakage of the connecting member 11.

  When the connecting member 11 and the plurality of brake devices 8 are joined by a plurality of detachable joining members 12, the connecting member 11 can be easily attached to and detached from the brake device 8. Become advantageous.

  Furthermore, when the plurality of joining members 12 are arranged at equal intervals on a circle centered on the axis of each axle 3 when viewed in the Y direction, the rotational direction of the axle 3 transmitted from the axle 3 to the brake device 8 is increased. The load M can be transmitted to the connecting member 11 with good balance. Therefore, the load M transmitted from the brake device 8 can be prevented from concentrating locally on the connecting member 11, which is advantageous in avoiding buckling and breakage of the connecting member 11.

  As in this embodiment, when the connecting member 11 and the plurality of brake devices 8 are friction-joined by the bolts 12a and nuts 12b, the friction surface through which the load M in the rotational direction of the axle 3 is transmitted from the brake device 8 to the connecting member 11 is provided. Since it can ensure widely, the load M of the rotation direction by the brake device 8 can be effectively transmitted to the connection member 11 with sufficient balance. Therefore, it becomes more and more advantageous to avoid that the load M in the rotational direction by the brake device 8 is concentrated on the local area of the connecting member 11.

  When the connecting member 11 is joined to the surface of each of the plurality of brake devices 8 facing the opposite side of each wheel 2, there is no need to provide a through hole through which the axle 3 and the brake device 8 are inserted in the connecting member 11. It is possible to ensure a wide bonding area between 8 and the connecting member 11. Therefore, it is more advantageous to prevent the load M transmitted to the connecting member 11 from concentrating locally on the connecting member 11 while more reliably preventing the brake device 8 from rotating by the connecting member 11. Moreover, since it becomes easy to attach or detach the connection member 11 with respect to the brake device 8 by arrange | positioning the connection member 11 with respect to the brake device 8 on the outer side of the cargo handling apparatus 20, in maintainability of the brake device 8 or the connection member 11 Will also be advantageous. Since the end surface of the brake device 8 facing the opposite side of the wheel 2 is covered with the connecting member 11, even when a stone or the like collides with the traveling device 1 from the lateral direction, the connecting device 11 causes the brake device 8 to be Can be protected.

  In the present invention, like the dependent traveling device 1 illustrated in FIG. 7, the traveling device 1 may not include the driving device 5. In the dependent traveling device 1, the driving device 5 is not connected to one end portion of the axle 3, and the fixing member 13 is not provided. Other configurations are the same as those of the traveling device 1 of the embodiment shown in FIGS.

  When the cargo handling device 20 travels with the drive type travel device 1 exemplified above, the wheel 2 and the axle 3 of the subordinate travel device 1 are in a freely rotating state. When a braking force is applied to the axle 8 by the brake device 8, the rotation of the axle 3 in a freely rotating state is braked. This traveling device 1 can also achieve the same effects as the traveling device 1 of the above-described embodiment.

  FIG. 8 shows a traveling device 1 according to still another embodiment of the present invention. In the traveling device 1 of this embodiment, the connecting member 11 is joined to the end face of each of the plurality of brake devices (rotating bodies) 8 facing the wheel 2 side. Furthermore, in this traveling device 1, the driving device 5 is not provided with the fixing member 13, and instead, two speed reducers 7 (rotating bodies) adjacent in the X direction are connected by one connecting member 11. Yes. Other configurations are the same as those of the traveling device 1 of the embodiment shown in FIGS.

  In this embodiment, the connecting member 11 that connects the brake devices 8 is provided with a through hole through which each axle 3 is inserted. The through-hole is formed to be larger than the diameter of the axle 3, and the inner peripheral surface of the through-hole formed in the connecting member 11 and the axle 3 are not brought into contact with each other, and the through-hole is preferably arranged with a certain gap. In this way, when the connecting member 11 is joined to the end face of each of the plurality of brake devices 8 facing the wheel 2 side, the brake device 8 is exposed to the opposite side of the wheel 2. And maintenance becomes easier.

  In this traveling device 1, the plurality of reduction gears 7 are connected to each other by the connecting member 11, so that the rotation of each reduction gear 7 with respect to the housing 24 a is prevented. Each reduction gear 7 and the connecting member 11 are joined by a plurality of joining members 12 (bolts 12 a and nuts 12 b) as in the case of the brake device 8.

  As described above, when the plurality of reduction gears 7 are connected to each other by the connecting member 11, the same effect as that in the case where the above-described brake devices 8 are connected to each other by the connecting member 11 can be obtained. In this traveling device 1, the connecting member 11 is joined to the end face facing the opposite side of each wheel 2 of the speed reducer 7, but the connecting member 11 is the end face facing the wheel 2 side of the speed reducer 7. Can also be joined.

  In the embodiment exemplified above, the case where two rotating bodies (the brake device 8 and the speed reducer 7) are coupled by the coupling member 11 is illustrated. However, for example, as illustrated in FIG. It can also be set as the structure which connected the one end part of the above rotary body.

  Even when three or more rotating bodies are connected by the connecting member 11, the load M in the rotational direction of the axle 3 transmitted from each rotating body to the connecting member 11 is similar to the case where the two rotating bodies are connected. Cancel each other. Therefore, as in the case of connecting the two rotating bodies, the rotation of each rotating body can be prevented without applying a large load to the connecting member 11.

  In the embodiment illustrated above, the configuration in which the brake devices 8 are arranged at the same height position in the Z direction is illustrated, but the height positions of the brake devices 8 connected by the connecting member 11 are different. Even in different cases, the loads M cancel each other, so that the same effect can be obtained with the same configuration. The shape and size of the brake device 8 are not particularly limited, and for example, a brake device 8 whose outer shape is a polygonal column shape or a cylindrical shape may be employed.

1 Traveling device 2 Wheel 3 Axle 4 Bearing part (bearing housing)
5 Drive device 6 Motor 7 Reducer (Rotating body)
8 Brake device (rotating body)
9 Brake shaft 10 Bearing 11 Connecting member 12 Joining member 12a Bolt 12b Nut 13 Fixing member 20 Cargo handling equipment 21 Structure 22 Equalizer 23 Bogie pin 24 Bogie 24a (Bogie) housing R Rail M Load (moment)

Claims (7)

A plurality of wheels arranged side by side in the traveling direction and rotating in the same direction, a plurality of axles with one end protruding from the wheels while being inserted through the respective wheels, and one end of each axle A plurality of connected rotating bodies, wherein the rotating body applies at least one of a driving force and a braking force to the axle.
A connecting member configured by a plate whose surface vertical direction faces the axial direction of the axle, wherein the connecting member is either one of both ends of the plurality of rotating bodies in the axial direction of the axle; The plurality of rotating bodies are joined to one end to connect the plurality of rotating bodies, and the region between the plurality of rotating bodies of the connecting member is adapted to the displacement of each of the plurality of rotating bodies due to the displacement of the plurality of axles. A traveling device characterized by being freely deformable.   The traveling device according to claim 1, wherein the connecting member is formed of a single metal plate.   The travel device according to claim 1, wherein the connecting member has a shape in which each of the plurality of axles is accommodated inside an outer edge of the connecting member when viewed in an axial direction of the axle.   The connection member according to any one of claims 1 to 3, wherein the connection member has a shape in which the one end portion of each of the plurality of rotating bodies is accommodated inside an outer edge of the connection member when viewed in the axial direction of the axle. The traveling device described in 1.   The travel device according to any one of claims 1 to 4, wherein the connecting member has a convex polygonal shape or an oval shape when viewed in the axial direction of the axle.   The rotating body and the connecting member are joined by a plurality of detachable joining members, and the plurality of joining members are centered on the axis of each axle as viewed in the axial direction of the axle. The traveling device according to any one of claims 1 to 5, wherein the traveling device is arranged at equal intervals on a circle.   The travel device according to any one of claims 1 to 6, wherein the one end portion is an end surface facing each wheel of each of the plurality of rotating bodies.

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