JP2020011542A - Power transmission mechanism - Google Patents

Abstract

To provide a compact power transmission mechanism which can be widened and stored in a good balance without inclining a widening section.SOLUTION: A power transmission mechanism includes: a widening shaft which rotates on the basis of input rotational force; a synchronism mechanism which synchronizes the input rotational force in the widening shaft on a vehicle body front side and a vehicle body rear side; a slider which moves the widening section in a storing direction or a widening direction on the basis of moving force converted by a widening mechanism for converting the rotation of the widening shaft into moving force in a linear direction; guide chains which are arranged on upper and lower sides of the widening section and moves together with the widening section on the vehicle body front side and the vehicle body rear side of the widening section; a sprocket which is engaged with each of the guide chains; and a chain which is laid over the sprockets on the upper and lower sides and synchronizes rotation of the sprockets on the upper and lower sides.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a power transmission mechanism that realizes synchronous driving and self-holding of a widening portion in a widening vehicle in which a body side surface widens.

  For example, in an area hit by a disaster such as an earthquake, a specially equipped vehicle 100 as shown in FIG. 7 may be dispatched because a facility for rescuers to stay asleep is required (for example, see Non-Patent Document 1). .

  Such a specially equipped vehicle 100 originally has a large space inside the vehicle body, but has a widened portion 140 that can be expanded in the width direction on a side surface of the vehicle body 160 in order to further increase the space. ing. The widening portion 140 is stored in the vehicle body 160 when not in use or when traveling, and is widened laterally from the vehicle body 160 when necessary.

Gigazin Net News October 19, 2012, "I photographed a specially equipped vehicle owned by Tokyo Fire Department Hyper Rescue, such as a 12m huge ambulance" Super Ambulance "and an unmanned water discharge vehicle" Dragon "", [online], [Search on July 12, 2018], Internet <URL: https://i.gzn.jp/img/2012/10/19/tokyo-fire-department-vehicles-riscon-2012/GIG#1632.jpg >

  By the way, in the specially equipped vehicle 100 described above, the widened portion 140 has an extremely large volume with respect to the vehicle body 160. For this reason, when the widening portion 140 is widened by the hydraulic boom 141 (two provided at the front and rear of the vehicle body), the widening portion 140 may be inclined in the vehicle front-rear direction as shown in FIG. Was.

  Further, since the widening portion 140 has a large weight, when widening is performed as shown in FIG. 9A, the widening portion 140 becomes a cantilever having an unfixed tip, and the tip may hang down. there were. As a specially-equipped vehicle that prevents such drooping, a specially-equipped vehicle in which a leg 170 is provided at the end of a widened portion 140 as shown in FIG. 9B is also known. It was difficult to be in one position.

  Here, the integrated posture refers to maintaining the posture so that the widened portion 140 does not incline with respect to the vehicle body 160. For example, when the specially-equipped vehicle is located on a slope having an inclination angle of 5 degrees, the widening portion 140 must also be able to be widened and stored in a state of being inclined 5 degrees in the same direction as the vehicle body 160.

  In order to manufacture a specially-equipped vehicle without the legs 170, two or more huge hydraulic booms 141 for preventing drooping must be provided, and there is also a problem that the vehicle body and the power transmission mechanism become large. Was.

  An object of the present invention is to provide a compact power transmission mechanism capable of widening and storing the widened portion in a balanced manner without tilting the widened portion.

The power transmission mechanism of the present invention,
In a specially-equipped vehicle including a widened portion that can be expanded in a vehicle body width direction, a power transmission mechanism that transmits power related to a widening operation of the widened portion,
A widening shaft that is arranged on the vehicle body front side and the vehicle body rear side of the widening portion, and rotates based on the input torque,
A synchronizing mechanism for synchronizing the input rotational force with the widening axis on the vehicle body front side and the widening axis on the vehicle body rear side,
A widening mechanism that converts the rotation of the widening shaft into a moving force in a linear direction,
A slider that moves the widening portion in the storage direction or the widening direction based on the moving force converted by the widening mechanism,
On the vehicle body front side and the vehicle body rear side of the widening section, a guide chain that is arranged above and below the widening section and moves together with the widening section,
A sprocket meshing with each of the guide chains,
And a chain that wraps around the upper and lower sprockets and synchronizes the rotation of the upper and lower sprockets.

  Thus, the widening shafts at the front and rear of the vehicle body are synchronously rotated by the synchro mechanism, and the upper and lower guide chains of the widened portion are synchronously moved by the chain. Therefore, the widened portion and the power transmission mechanism can be made compact, and the widened portion can be moved in a well-balanced manner without tilting the widened portion in any of the vertical direction and the vehicle longitudinal direction.

Further, the power transmission mechanism of the present invention,
The sprocket is located below the guide chain.

  This makes it difficult for dust or the like generated during rotation of the sprocket to be caught on the guide chain, thereby suppressing rust of the guide chain.

Further, the power transmission mechanism of the present invention,
The synchronization mechanism,
A shaft arranged parallel to the longitudinal direction of the vehicle body,
Bevel gears are disposed on the vehicle body front side and the vehicle body rear side of the shaft, respectively, and convert the rotational force into a direct direction.
The rotation of the widening shaft on the vehicle body front side and the vehicle body rear side is synchronized through the shaft and the bevel gear.

  By using the bevel gear as described above, the size of the synchronization mechanism can be reduced.

  According to the invention according to the present invention, it is possible to provide a power transmission mechanism that widens the width in a well-balanced manner so that the widening portion does not tilt.

FIG. 1 is a perspective view of an outline of a configuration of a power transmission mechanism according to an embodiment as viewed from the inside of a vehicle body. FIG. 1 is a perspective view of an outline of a configuration of a power transmission mechanism according to an embodiment, as viewed from the outside of a vehicle body. It is a perspective view which shows the widening mechanism concerning embodiment. It is a schematic diagram showing a guide chain according to an embodiment. It is a perspective view showing a sprocket which meshes with a guide chain concerning an embodiment. It is a perspective view showing the case where a motor is arranged in the center in other embodiments. It is a perspective view which shows the conventional specially equipped vehicle. It is a schematic diagram which shows the state where the widening part was inclined in the vehicle longitudinal direction when the conventional specially equipped vehicle was widened. It is a mimetic diagram showing the state where the widening part was hung when the conventional specially equipped vehicle was widened.

  Hereinafter, a power transmission mechanism according to an embodiment of the present invention will be described with reference to the drawings. This power transmission mechanism is a mechanism for transmitting power related to a widening operation in a specially-equipped vehicle whose body side surface is widened. In this specification, “up” or “down” indicates an up-down direction based on a vertical direction since a specially-equipped vehicle is usually placed on the ground. In this specification, the direction on the side where the widened portion is widened is referred to as the widening direction, and the direction on the side where the widened portion is stored is referred to as the storage direction.

  1 and 2 are diagrams showing an outline for describing a configuration of a power transmission mechanism according to an embodiment. FIG. 1 shows a state in which the widened portion 4 is widened to the outside of the vehicle body in a specially-equipped vehicle, as viewed from the inside of the vehicle body, and FIG. . In the following description, in describing the structure of the widened portion 4, each corner of the frame, which is the basic configuration of the widened portion 4, is illustrated as A, B, C, D, E, F, G and H will be used for the sake of convenience.

  In the widened portion 4, a slider 6 is arranged inside the frame between the AE and the frame between the BFs (on the indoor side of the widened portion 4) in parallel with these frames. The ends of the sliders 6 on the widening direction side are fixed to a frame between the EFs of the widening portions 4, and the sliders 6 can move together with the widening portions 4. A widening mechanism 8 described later is provided at an end of the slider 6 on the storage direction side.

  Further widening shafts 10 each having a trapezoidal screw 10b (see FIG. 3) formed on the surface thereof are disposed on the vehicle body front side and the vehicle body rear side of the widening portion 4 on the storage direction side of each slider 6, respectively. The ends of the widening shaft 10 on the widening direction side are connected to the slider 6 via a widening mechanism 8, and the ends of the widening shaft 10 on the storing direction side are provided with sprockets 10a.

  As shown in FIG. 3, the widening mechanism 8 is a mechanism having a nut portion 8a in which a female screw (not shown) screwed with the trapezoidal screw 10b of the widening shaft 10 is formed. In this manner, by the combination of the widening shaft 10 and the nut portion 8a screwed thereto, the force in the rotating direction of the widening shaft 10 is converted into the moving force in the widening direction orthogonal to the rotating direction or in the linear direction in the storage direction. .

  Below each widening shaft 10, a shaft 12 extending in a direction parallel to the widening shaft 10 is arranged. The ends of the shafts 12 on the widening direction side are connected to the bevel gear 14, and the sprockets 12a are provided on the ends on the storage direction side.

  A chain 16 is vertically extended between the respective sprockets 10a and 12a at the front and rear of the vehicle body. Further, between the bevel gears 14, 14 in the front and rear of the vehicle body, a shaft 18 that is parallel to a frame between EFs extending in the longitudinal direction of the vehicle body is disposed. The shaft 18 and the bevel gear 14 function as a synchronizing mechanism, and the rotation of the widening shaft 10 at the front and rear of the vehicle body is synchronized.

  A motor 20 is arranged below the shaft 18 in front of the vehicle body. A sprocket 20a is provided on the storage side of the motor 20, and a chain 22 is vertically extended between the sprocket 12a and the sprocket 20a in front of the vehicle body. The motor 20 may be arranged below the shaft 18 behind the vehicle body.

  A pillar 26 having a chain 24 therein is provided outside the widened portion 4 in the front and rear of the vehicle body, and a shaft 28 is disposed above the pillar 26. Two sprockets 28a are provided side by side on the widened portion 4 side of the shaft 28, and two sprockets 28b are provided side by side at the center. Similarly, a shaft 29 is disposed below the column 26. Two sprockets 29a are provided side by side on the widened portion 4 side of the shaft 29, and two sprockets 29b are provided side by side at the center. Further, between the sprockets 28b, 29b, two chains 24 that synchronize the rotation of the sprocket 28b with the rotation of the sprocket 29b are extended vertically. Note that the column 26 is fixed to the vehicle body, and the shafts 28 and 29 do not move together with the widened portion 4.

  Further, as shown in FIG. 4, two guide chains 32 are arranged in the frame between the DH and the CG of the widened portion 4 in parallel with the frame. Similarly, in the frame between the AE and the BF of the widening portion 4, two guide chains 34 are arranged in parallel with the frame. These guide chains 32 and 34 are fixed to the widened portion 4 and move together with the widened portion 4. Here, as shown in FIG. 5, the sprocket 29a is engaged with the guide chain. The sprocket 28a is also meshed with the guide chain 32. The sprocket 28a is disposed below the guide chain 32, and the sprocket 29a is disposed below the guide chain 34.

  Next, the operation of the power transmission mechanism according to the embodiment will be described by taking as an example the operation when the widened portion 4 is housed inside the vehicle body. First, when the motor 20 is driven and torque is input to the sprocket 20a, torque is transmitted to the shaft 12 via the chain 22 and the sprocket 12a. The rotational force of the shaft 12 is converted in the orthogonal direction by the bevel gear 14 on the front side of the vehicle body and transmitted to the shaft 18. The rotational force of the shaft 18 is further converted in the orthogonal direction by the bevel gear 14 on the rear side of the vehicle body and transmitted to the shaft 12. As a result, the two shafts 12 at the front and rear of the vehicle body rotate synchronously.

  Further, the rotational force of the shaft 12 is transmitted to the widening shaft 10 via the sprocket 12a, the chain 16, and the sprocket 10a. When the widening shaft 10 rotates, the slider 6 moves in the storage direction by screwing a trapezoidal screw 10b formed on the surface of the widening shaft 10 and a female screw formed inside the nut portion 8a. That is, the slider 6 moves on the basis of the moving force converted by the widening mechanism 8, and accordingly, the entire widening section 4 to which the slider 6 is fixed moves in the storage direction.

  As the widened portion 4 moves in the storage direction, the guide chain 34 fixed to the framework also moves in the storage direction. Thereby, the sprocket 29a meshing with the guide chain 34 rotates. The rotational force of the sprocket 29a is transmitted to the sprocket 28a via the shaft 29, the sprocket 29b, the chain 24, the sprocket 28b, and the shaft 28, as shown in FIG.

  When the sprocket 28a rotates, the guide chain 32 meshing with the sprocket 28a moves toward the storage direction. As described above, since the upper and lower sprockets 28a and 29a are connected via the chain 24, the upper guide chain 32 and the lower guide chain 34 move in the storage direction in synchronization.

  As described above, the widening portion 4 simultaneously moves in the storage direction using the guide chains 32 and 34 at the front and rear of the vehicle body as the rotation tracks.

  According to the power transmission mechanism in this embodiment, the widening shafts 10 around the vehicle body rotate synchronously with the shaft 18, and the upper and lower guide chains 32, 34 of the widening portion 4 move synchronously with the chain 24. Thus, the widening portion 4 and the power transmission mechanism can be made compact, and the widening portion 4 can be moved in a well-balanced manner without tilting the widening portion 4 in either the up-down direction or the vehicle longitudinal direction.

  In the power transmission mechanism according to the above-described embodiment, the sprockets 28a and 29a are arranged below the guide chain 34, and the guide chains 32 and 34 are located above the sprockets 28a and 29a. Therefore, dust or the like generated when the sprockets 28a, 29a rotate is less likely to be caught on the guide chains 32, 34, and rust on the guide chains 32, 34 can be suppressed.

  In the above-described embodiment, a case has been described as an example where the motor 20 generates the torque to be input to the power transmission mechanism. However, the input torque may not necessarily be generated by the motor 20. For example, the rotational force may be manually input using a handle or the like.

  Further, in the above-described embodiment, the case where the shaft 18 and the bevel gear 14 function as a synchronizing mechanism, and one (the front of the vehicle body) widening shaft 10 rotates while the other (the rear of the vehicle body) widening shaft 10 rotates as the slave. Although described in the example, both the widening shafts 10 may rotate simultaneously. For example, a synchronizing mechanism may be used in which the motor 20 is disposed at the center and the chains 42 are wound between the sprockets 20a and 12a to rotate the shaft 12 at the same time, as shown in FIG.

  Further, in the above-described embodiment, the operation of the power transmission mechanism is described by taking as an example a case where the widening portion 4 is housed inside the vehicle body. Even in this case, the widened portion 4 can be moved in a well-balanced manner without tilting the widened portion 4 in both the vertical direction and the vehicle longitudinal direction.

  Further, in the above-described embodiment, the case where the widened portion 4 having the power transmission mechanism according to the present invention is disposed only on one side surface of the vehicle body is described as an example, but the power transmission mechanism according to the present invention is described. May be arranged on both side surfaces of the vehicle body. In this case, a larger space can be prepared inside the vehicle body.

4 Widening section 6 Slider 8 Widening mechanism 8a Nut section 10 Widening shaft 10a Sprocket 10b Trapezoidal screw 12 Shaft 12a Sprocket 14 Bevel gear 16 Chain 18 Shaft 20 Widening section 20 Motor 20a Sprocket 22 Chain 24 Chain 26 Column 28 Shaft 28a Sprocket 28b Sprocket 29 Shaft 29a sprocket 29b sprocket 32 guide chain 34 guide chain 42 chain 100 specially equipped vehicle 140 widening section 141 hydraulic boom 142 overhanging section 160 body body 162 engaging section 170 leg section

The power transmission mechanism of the present invention,
In a specially-equipped vehicle including a widened portion that can be expanded in a vehicle body width direction, a power transmission mechanism that transmits power related to a widening operation of the widened portion,
A widening shaft that is arranged on the vehicle body front side and the vehicle body rear side of the widening portion, and rotates based on the input torque,
A synchronizing mechanism for synchronizing the input rotational force with the widening axis on the vehicle body front side and the widening axis on the vehicle body rear side,
A widening mechanism that converts the rotation of the widening shaft into a moving force in a linear direction,
A slider that moves the widening portion in the storage direction or the widening direction based on the moving force converted by the widening mechanism,
A first shaft that is disposed outside the widening portion above and below the widening portion on the vehicle body front side and the vehicle body rear side, and that does not move with the widening portion formed with the first sprocket and the second sprocket arranged in the axial direction; ,
On the vehicle body front side and the vehicle body rear side of the widening portion, they are arranged above and below the widening portion, and when the widening portion moves by movement of the slider, move with the widening portion while engaging with the first sprocket. A guide chain ,
And a chain that is wound around the upper and lower second sprockets and synchronizes the rotation of the upper and lower first shafts .

Further, the power transmission mechanism of the present invention,
The first sprocket is located below the guide chain.

Further, the power transmission mechanism of the present invention,
A second shaft arranged parallel to the longitudinal direction of the vehicle body;
A bevel gear that is arranged on the vehicle body front side and the vehicle body rear side of the second shaft, respectively, and that converts a rotational force in a direction perpendicular to the second shaft,
The rotation of the widening shafts on the vehicle body front side and the vehicle body rear side is synchronized through the second shaft and the bevel gear.

Claims (3)

In a specially-equipped vehicle including a widened portion that can be expanded in a vehicle body width direction, a power transmission mechanism that transmits power related to a widening operation of the widened portion,
A widening shaft that is arranged on the vehicle body front side and the vehicle body rear side of the widening portion, and rotates based on the input torque,
A synchronizing mechanism for synchronizing the input rotational force with the widening axis on the vehicle body front side and the widening axis on the vehicle body rear side,
A widening mechanism that converts the rotation of the widening shaft into a moving force in a linear direction,
A slider that moves the widening portion in the storage direction or the widening direction based on the moving force converted by the widening mechanism,
On the vehicle body front side and the vehicle body rear side of the widening section, a guide chain that is arranged above and below the widening section and moves together with the widening section,
A sprocket meshing with each of the guide chains,
A power transmission mechanism comprising: a chain that is wound around the upper and lower sprockets and synchronizes rotation of the upper and lower sprockets.   The power transmission mechanism according to claim 1, wherein the sprocket is located below the guide chain. The synchronization mechanism,
A shaft arranged parallel to the longitudinal direction of the vehicle body,
Bevel gears that are arranged on the vehicle body front side and the vehicle body rear side of the shaft, respectively, and that convert a rotational force to a direct direction,
3. The power transmission mechanism according to claim 1, wherein rotations of the widening shafts on the vehicle body front side and the vehicle body rear side are synchronized via the shaft and the bevel gear. 4.

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