Coupler for articulated truck

Abstract

To provide a coupler of a coupled truck capable of stably traveling regardless of an advancing direction with a simple coupling structure.SOLUTION: A coupler of an articulated bogie is a coupler of an articulated bogie that connects a plurality of bogies in series and tows the plurality of bogies by a towing vehicle, and a front axle and a rear axle of the bogie are connected by a coupling link so that when one axle turns around its own axle center, the other axle turns around its own axle center in an opposite direction. The coupler includes cross bars (coupling members) having the same length and crossing each other, the cross bars coupling a first connection point on one end side of the rear axle of the front bogie and a second connection point on the other end side of the front axle of the rear bogie, and the cross bars are connected at the first connection point so as to be rotatable in accordance with a change in direction of the rear axle of the front bogie, and are connected at the second connection point so as to maintain a predetermined angle with the front axle of the rear bogie.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a coupler for an articulated truck. [Background technology]

[0002] Patent Document 1 discloses a coupler for a connected bogie in which a plurality of bogies are connected and towed by a towing vehicle. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-160454 Summary of the Invention [Problem to be solved by the invention]

[0004] In the articulated bogie of Patent Document 1, multiple bogies are connected by connecting arms. These connecting arms are configured to prevent their own orientation from changing relative to the direction of travel by a locking member operated by a link mechanism, ensuring the stability of the articulated bogie when it is moved straight in one direction or the other.

[0005] However, since the coupler of Patent Document 1 requires a complex link mechanism, it is desired to ensure the stability of the coupled bogies with a simpler coupling structure.

[0006] An object of the present disclosure is to provide a coupler for articulated bogies that has a simple coupling structure and allows stable running regardless of the direction of travel. [Means for solving the problem]

[0007] In order to solve the above-mentioned problems and achieve the object, the present disclosure provides a coupler for articulated bogies in which multiple bogies are connected in series and towed by a towing vehicle, the front and rear axles of the bogies being connected by a link member so that when one axle changes direction around the center of its own axle, the other axle changes direction in the opposite direction around the center of its own axle, the coupler being composed of connecting members of the same length that intersect with each other and connect a first connection point on one end of the rear axle of the front bogie to a second connection point on the other end of the front axle of the rear bogie, the connecting members being connected at the first connection point so as to be rotatable in response to changes in direction of the rear axle of the front bogie, and being connected at the second connection point so as to maintain a predetermined angle with the front axle of the rear bogie. [Effects of the Invention]

[0008] According to the present disclosure, a simple connecting structure allows a connected carriage to travel stably. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a top view showing an example of a schematic configuration of an articulated bogie according to this embodiment. [Figure 2] FIG. 2 is a diagram showing an example of a connection structure of a coupler. [Figure 3] FIG. 3 is a diagram illustrating the action of the coupler when the articulated bogie of this embodiment moves forward in one direction. [Figure 4] FIG. 4 is a diagram illustrating the action of the coupler when the articulated bogie of the embodiment moves forward in the reverse direction. [Figure 5] FIG. 5 is a diagram illustrating the functions of a single pin and a double pin in a coupler provided on the articulated bogie of the embodiment. [Figure 6] FIG. 6 is a first diagram illustrating the behavior of the articulated bogie of the comparative example when the articulated bogie moves. [Figure 7] FIG. 7 is a second diagram illustrating the behavior of the articulated bogie of the comparative example when the articulated bogie moves. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, a coupler for a coupled bogie according to an embodiment will be described with reference to the accompanying drawings.

[0011] (Outline of the articulated bogie) The schematic configuration of an articulated bogie 10 according to the embodiment will be described with reference to Fig. 1. Fig. 1 is a top view showing an example of the schematic configuration of an articulated bogie according to the present embodiment.

[0012] The articulated cart 10 is used as a transport vehicle for transporting parts required for assembly on a factory production line, for example. The articulated cart 10 is composed of a towing vehicle 11 and multiple carts 12a, 12b, and 12c connected in series. While Fig. 1 shows three carts 12a, 12b, and 12c being towed by the towing vehicle 11, the number of carts is not limited to three.

[0013] The articulated bogie 10 is coupled to the towing vehicle 11 at the tip of the coupling section 14 by a coupling axle 14a. The articulated bogie 10 is driven by drive wheels driven by a power source such as a battery provided on the towing vehicle 11, and moves in the positive direction of the X-axis in the state shown in FIG. 1. When the articulated bogie 10 enters a dead end, for example, the coupling between the towing vehicle 11 and the bogie 12a is released. The towing vehicle 11 is then moved to the rearmost part of the articulated bogie 10, and the tip of the coupling section 15 formed on the bogie 12c is coupled to the towing vehicle 11 by the coupling axle 15a. The articulated bogie 10 is then moved in the negative direction of the X-axis in FIG. 1, allowing the articulated bogie 10 to exit the dead end. The articulated bogie 10 can perform such switchback running.

[0014] Each of the bogies 12a, 12b, and 12c that form the articulated bogie 10 includes a front axle 21 and a rear axle 22. The front axle 21 includes a pair of front wheels 21b. The front axle 21 is installed to be rotatable around an axle center 21a that is aligned with the Z axis. The rear axle 22 includes a pair of rear wheels 22b. The rear axle 22 is installed to be rotatable around an axle center 22a that is aligned with the Z axis.

[0015] The front axle 21 and the rear axle 22 are connected by a connecting link 23. The connecting link 23 is spanned diagonally between the front axle 21 and the rear axle 22. More specifically, the connecting link 23 is spanned so as to intersect with a line segment connecting the axle center 21a of the front axle 21 and the axle center 22a of the rear axle 22. Therefore, when the front axle 21 changes direction about its own axle center 21a, the rear axle 22 changes direction in the opposite direction about its own axle center 22a, thereby providing a so-called anti-phase 4WS (4 Wheel Steering) function. As a result, when one axle of the bogies 12a, 12b, and 12c changes direction, the other axle rotates in a direction that reduces the turning radius during the turn, thereby improving maneuverability.

[0016] Furthermore, each of the carriages 12a, 12b, and 12c has a storage section 13 above the front axle 21 and the rear axle 22. In the storage section 13, parts to be transported and the like are loaded.

[0017] The bogies that form the coupled bogie 10 are connected by couplers 24. The coupler 24 includes, for example, a crossbar 24a that connects a first connection point 25a at one end of the rear axle 22 of the front bogie 12a to a second connection point 26a at the other end of the front axle 21 of the rear bogie 12b. The coupler 24 also includes a crossbar 24b that connects a first connection point 25b at one end of the rear axle 22 of the front bogie 12a to a second connection point 26b at the other end of the front axle 21 of the rear bogie 12b. The crossbars 24a and 24b are plate members having the same length and are installed so as to intersect with each other.

[0018] The front side (positive side of the X-axis) of crossbar 24a is connected to mounting member 27a. Mounting member 27a is a member that is installed on rear axle 22 and has a flat upper surface (positive side of the Z-axis). The front side of crossbar 24a is connected to mounting member 27a at first connection point 25a. The connection structure of crossbar 24a at first connection point 25a will be described in detail later (see FIG. 2).

[0019] The rear side (negative side of the X-axis) of crossbar 24a is connected to mounting member 28a. Mounting member 28a is a member that is installed on front axle 21 and has a flat upper surface (positive side of the Z-axis). The rear side of crossbar 24a is connected to mounting member 28a at second connection point 26a. The connection structure of crossbar 24a at second connection point 26a will be described in detail later (see FIG. 2).

[0020] Similarly, the front side (positive side of the X-axis) of crossbar 24b is connected to mounting member 27b. Mounting member 27b is a member that is installed on rear axle 22 and has a flat upper surface (positive side of the Z-axis). The front side of crossbar 24b is connected to mounting member 27b at first connection point 25b. The connection structure of crossbar 24b at first connection point 25b will be described in detail later (see FIG. 2).

[0021] The rear side (negative side of the X-axis) of crossbar 24b is connected to mounting member 28b. Mounting member 28b is a member that is installed on front axle 21 and has a flat upper surface (positive side of the Z-axis). The rear side of crossbar 24b is connected to mounting member 28b at second connection point 26b. The connection structure of crossbar 24b at second connection point 26b will be described in detail later (see FIG. 2).

[0022] (Crossbar connection structure) The connection structure of the crossbars 24a, 24b will be described with reference to Figure 2. Figure 2 is a diagram showing an example of the connection structure of the coupler.

[0023] A single hole 32a is formed in the end of the cross bar 24a on the mounting member 27a side. A cylindrical single pin 30a formed on the mounting member 27a passes through this single hole 32a, connecting the cross bar 24a and the mounting member 27a. The single hole 32a is an example of the first connection point 25a described above. The cross bar 24a rotates in the single hole 32a in accordance with the direction of the rear axle 22 on which the mounting member 27a is installed.

[0024] A connecting hole 33a is formed in the end of the crossbar 24a on the mounting member 28a side. The connecting hole 33a is formed by connecting two single holes. A cylindrical double pin 31a formed in the mounting member 28a passes through this connecting hole 33a, connecting the crossbar 24a and the mounting member 28a. The connecting hole 33a is an example of the second connection point 26a described above. Because the crossbar 24a is connected to the mounting member 28a through the connecting hole 33a, the angle between the front axle 21 and the crossbar 24a remains constant even if the direction of the front axle 21 on which the mounting member 28a is installed changes. This will be described in more detail later (see FIG. 5).

[0025] The crossbar 24b is connected to the mounting members 27b and 28b from above the crossbar 24a so as to intersect with the crossbar 24a. A single hole 32b is formed in the end of the crossbar 24b facing the mounting member 27b. A cylindrical single pin 30b formed in the mounting member 27b passes through this single hole 32b, thereby connecting the crossbar 24b and the mounting member 27b. The single hole 32b is an example of the first connection point 25b described above. The crossbar 24b rotates at the single hole 32b in accordance with the direction of the rear axle 22 on which the mounting member 27b is installed.

[0026] A connecting hole 33b is formed in the end of the crossbar 24b on the mounting member 28b side. The connecting hole 33b is formed by connecting two single holes. A cylindrical double pin 31b formed in the mounting member 28b passes through this connecting hole 33b, connecting the crossbar 24b to the mounting member 28b. The connecting hole 33b is an example of the second connection point 26b described above. Because the crossbar 24b is connected to the mounting member 28b through the connecting hole 33b, the angle between the front axle 21 and the crossbar 24b remains constant even if the direction of the front axle 21 on which the mounting member 28b is installed changes. This will be described in more detail below (see FIG. 5).

[0027] In the connection structure of Figure 2, the lengths of the single pins 30a and double pins 31a are made longer than the thickness of the crossbar 24a so that the crossbars 24a and 24b are reliably connected to the respective mounting members. That is, when the crossbar 24a is connected to the respective mounting members, it is desirable that the single pins 30a protrude from the single holes 32a and the double pins 31a protrude from the connecting holes 33a. Also, the lengths of the single pins 30b and double pins 31b are made longer than the sum of the thicknesses of the crossbars 24a and 24b. That is, when the crossbar 24b is connected to the respective mounting members, it is desirable that the single pins 30b protrude from the single holes 32b and the double pins 31b protrude from the connecting holes 33b.

[0028] 2 shows a configuration in which crossbar 24a is connected after crossbar 24b, but crossbar 24b may be connected first and then crossbar 24a. Furthermore, to make the order in which the crossbars are connected irrelevant, it is desirable that the lengths of the single pins 30a, 30b and the double pins 31a, 31b are both longer than the sum of the thicknesses of crossbar 24a and crossbar 24b.

[0029] In the crossbar 24a, the diameter of the single hole 32a is slightly larger (for example, about 2 mm) than the diameter of the single pin 30a, and the diameter of each of the connecting holes 33a is slightly larger (for example, about 2 mm) than the diameter of the double pin 31a.

[0030] In the crossbar 24b, the diameter of the single hole 32b is slightly larger (for example, about 2 mm) than the diameter of the single pin 30b, and the diameter of each of the connecting holes 33b is slightly larger (for example, about 2 mm) than the diameter of the double pin 31b.

[0031] This reduces friction between the axles of the connected bogies and the crossbars 24a, 24b, allowing the connected bogie 10 to run smoothly.

[0032] (Coupler action) The operation of the coupler 24 provided on the articulated bogie 10 will be described using Figures 3 and 4. Figure 3 is a diagram illustrating the operation of the coupler when the articulated bogie of this embodiment moves forward in one direction. Figure 4 is a diagram illustrating the operation of the coupler when the articulated bogie of this embodiment moves forward in the opposite direction.

[0033] First, with reference to FIG. 3, the operation of the coupler 24 when the articulated bogie 10 moves straight in the positive direction of the X-axis in FIG. 1 will be described.

[0034] When the articulated bogie 10 moves straight in the positive direction of the X-axis, a tensile force indicated by arrow A1 in Fig. 3 acts on each of the bogies 12a, 12b, and 12c in Fig. 1 along the axial direction passing through the axle centers 21a and 22a of each bogie. This tensile force is a combination of the tensile forces acting on the mounting members 27a and 27b provided on each bogie. In other words, the rear axle 22, to which the mounting members 27a and 27b are attached, is stably pulled in the direction of arrow A1.

[0035] A force in the direction of arrow A2 in FIG. 3 acts on mounting member 28a, which is connected to the other end of crossbar 24a connected to mounting member 27a, due to the tensile force of arrow A1. That is, a force acts to align crossbar 24a with the direction of arrow A1. Similarly, a force in the direction of arrow A3 in FIG. 3 acts on mounting member 28b, which is connected to the other end of crossbar 24b connected to mounting member 27b, due to the tensile force of arrow A1. That is, a force acts to align crossbar 24b with the direction of arrow A1. Note that the magnitude of the force acting in the direction of arrow A2 and the magnitude of the force acting in the direction of arrow A3 are approximately equal. This is because articulated bogie 10 is formed symmetrically with respect to a line passing through axle centers 22a and 21a. Furthermore, because the crossbar 24a is connected to the mounting member 28a by a double pin 31a, the angle formed between the mounting member 28a and the crossbar 24a is maintained constant even when a force in the direction of arrow A2 is applied. Furthermore, because the crossbar 24b is connected to the mounting member 28b by a double pin 31b, the angle formed between the mounting member 28b and the crossbar 24b is maintained constant even when a force in the direction of arrow A3 is applied. Furthermore, because the mounting members 28a and 28b are both fixed to the front axle 21, the angle formed between the front axle 21 and the crossbar 24a and the angle formed between the front axle 21 and the crossbar 24b are both maintained constant. Therefore, when the articulated bogie 10 travels straight in the positive direction of the X-axis, the coupler 24 allows the articulated bogie 10 to travel stably without meandering.

[0036] Next, with reference to FIG. 4, the operation of the coupler 24 when the articulated bogie 10 moves straight in the negative direction of the X axis in FIG. 1 will be described.

[0037] When the articulated bogie 10 moves straight in the negative direction of the X-axis, a tensile force indicated by arrow B1 in FIG. 4 acts on each of the bogies 12a, 12b, and 12c in FIG. 1 along the axial direction passing through the axle centers 21a and 22a of each bogie. This tensile force is a combination of the tensile forces acting on the mounting members 28a and 28b of each bogie. In other words, the front axle 21, to which the mounting members 28a and 28b are attached, is stably pulled in the direction of arrow B1.

[0038] The tensile force of arrow B1 acts on mounting member 27a, which is connected to the other end of crossbar 24a connected to mounting member 28a, in the direction of arrow B2 in FIG. 4. That is, a force acts to align crossbar 24a with the direction of arrow B1. Similarly, the tensile force of arrow B1 acts on mounting member 27b, which is connected to the other end of crossbar 24b connected to mounting member 2bb, in the direction of arrow B3 in FIG. 3. That is, a force acts to align crossbar 24b with the direction of arrow B1. The magnitude of the force acting in the direction of arrow B2 and the magnitude of the force acting in the direction of arrow B3 are approximately equal. This is because articulated bogie 10 is formed symmetrically with respect to a line passing through axle centers 22a and 21a. Furthermore, because the crossbar 24a is connected to the mounting member 28a by a double pin 31a, the angle formed between the mounting member 28a and the crossbar 24a is maintained constant even when a force in the direction of arrow B2 is applied. Furthermore, because the crossbar 24b is connected to the mounting member 28b by a double pin 31b, the angle formed between the mounting member 28b and the crossbar 24b is maintained constant even when a force in the direction of arrow B3 is applied. Furthermore, because the mounting members 28a and 28b are both fixed to the front axle 21, the angle formed between the front axle 21 and the crossbar 24a and the angle formed between the front axle 21 and the crossbar 24b are both maintained constant. Therefore, when the articulated bogie 10 travels straight in the negative direction of the X-axis, the coupler 24 allows the articulated bogie 10 to travel stably without meandering.

[0039] (Single pin and double pin action) The functions of the single pins 30a, 30b and double pins 31a, 31b to which the coupler 24 is connected will be described using Figure 5. Figure 5 is a diagram for explaining the functions of the single pins and double pins in the coupler provided in the articulated bogie of the embodiment.

[0040] 5, the end of crossbar 24a on the negative side of the X axis is connected by double pin 31a standing up from mounting member 28a passing through connecting hole 33a formed in crossbar 24a. Also, the end of crossbar 24b on the negative side of the X axis is connected by double pin 31b standing up from mounting member 28b passing through connecting hole 33b formed in crossbar 24b.

[0041] Therefore, even if the front axle 21 changes direction and rotates around the axle center 21a when the articulated bogie 10 travels in the negative direction of the X-axis, the angle between the front axle 21 and the crossbar 24a is maintained constant. Furthermore, the angle between the front axle 21 and the crossbar 24b is also maintained constant. Therefore, the triangle PQR formed in FIG. 5 maintains a congruent shape regardless of the orientation of the front axle 21. In other words, when the articulated bogie 10 moves, the operating range of the point where the two crossbars 24a, 24b intersect (point P in FIG. 5) is limited. Therefore, the distance K between the two bogies connected by the coupler 24 is maintained constant, allowing the articulated bogie 10 to travel stably. Note that the coupler 24 acts in the same way when the articulated bogie 10 travels in the positive direction of the X-axis, allowing the articulated bogie 10 to travel stably regardless of its traveling direction.

[0042] On the other hand, although not shown, in FIG. 5, it is assumed that the front axle 21 and crossbar 24a are connected by a single pin formed on the mounting member 28a, and the front axle 21 and crossbar 24b are connected by a single pin formed on the mounting member 28b. In this connection configuration, when the articulated bogie 10 moves, the front axle 21 changes direction and rotates around the axle center 21a, and both the angle between the front axle 21 and crossbar 24a and the angle between the front axle 21 and crossbar 24b change. That is, because the position of the point where the two crossbars 24a, 24b intersect (point P in FIG. 5) changes, the congruence of the triangle PQR in FIG. 5 is lost, and the distance K between the two bogies connected by the coupler 24 changes. Therefore, the articulated bogie 10 may meander while traveling, reducing stability.

[0043] (Effects of the coupler of this embodiment) The inventors of the present disclosure conducted various evaluation experiments using the articulated bogie 10 equipped with the coupler 24. As a result, it was found that the articulated bogie 10 can travel stably regardless of the direction of travel, and therefore parts and the like can be supplied even in passages such as dead ends without being restricted by the passage width.

[0044] It was also confirmed that the time required to transport parts and the like can be reduced because the articulated carriage 10 can travel stably.

[0045] In addition, because stable running is now possible, it has become possible to increase the number of carts that can be connected at one time, which has reduced the number of times parts and other items need to be transported.

[0046] Furthermore, it was confirmed that the running noise when the articulated bogie 10 was running was reduced because stable running was possible.

[0047] Furthermore, it was confirmed that the stable running of the vehicle reduces the risk of the vehicle leaving the passageway or coming into contact with nearby obstacles.

[0048] (Explanation of Comparative Example) Next, the operation of the conventional coupler in the articulated bogie 10a of the comparative example will be briefly explained using Figures 6 and 7. Figure 6 is a first diagram illustrating the behavior of the articulated bogie of the comparative example when it moves. Figure 7 is a second diagram illustrating the behavior of the articulated bogie of the comparative example when it moves.

[0049] Fig. 6 shows an articulated bogie 10a that does not have a coupler 24 according to the present disclosure traveling in the positive direction of the X-axis. In the articulated bogie 10a, a towing vehicle 11 and multiple bogies 12a, 12b, and 12c are connected by a connecting shaft 14a at the tip of the coupling section 14. The coupling section 14 changes its own orientation in conjunction with the orientation of the front axle 21. The tip of the coupling section 14 is connected to the towing vehicle 11 or another bogie by the connecting shaft 14a.

[0050] In the connected state and traveling direction shown in Figure 6, when the connecting part 14 is pulled from the side of the connecting shaft 14a, an equal pulling force acts on the following bogie, as explained in Figure 3, improving the straight-line movement of the connected bogie 10a.

[0051] On the other hand, Fig. 7 shows a state in which an articulated bogie 10a, which is the towing vehicle 11 shown in Fig. 6 reversed in front and rear, is traveling in the negative direction of the X axis shown in Fig. 7. In the articulated bogie 10a, as in Fig. 6, the towing vehicle 11 and multiple bogies 12a, 12b, and 12c are connected at the tip of the coupling portion 14 by a connecting shaft 14a.

[0052] 7, the connecting shaft 14a is pulled from the side of the connecting part 14, so the force gathered on the connecting shaft 14a is dispersed in the left-right direction of the axle to which the connecting part 14 is connected. As a result, the direction of the force pulling the connecting shaft 14a cannot be kept uniform, and the straight-line running ability of the connected bogie 10a deteriorates.

[0053] Thus, the articulated bogie 10a of the comparative example cannot exhibit high straightness regardless of the traveling direction compared to the articulated bogie 10 according to the embodiment of the present disclosure.

[0054] (Effects of the embodiment) As explained above, the coupler 24 of the articulated bogie 10 according to this embodiment is a coupler for the articulated bogie 10 in which a plurality of bogies 12a, 12b, 12c are connected in series and towed by the towing vehicle 11, and the front axle 21 and rear axle 22 of the bogie are connected by the connecting link 23 so that when one axle changes direction around its own axle center, the other axle changes direction in the opposite direction around its own axle center. The coupler 24 is composed of crossbars 24a, 24b (connecting members) of the same length that intersect with each other and connect first connection points 25a, 25b on one end of the rear axle 22 of the front bogie with second connection points 26a, 26b on the other end of the front axle 21 of the rear bogie, and the crossbars 24a, 24b are connected at the first connection points 25a, 25b so as to be rotatable in response to changes in direction of the rear axle 22 of the front bogie, and are connected at the second connection points 26a, 26b so as to maintain a predetermined angle with the front axle 21 of the rear bogie. Therefore, with a simple connecting structure, the connected bogie 10 can travel stably with high straightness regardless of the direction of travel.

[0055] Furthermore, in the coupler 24 of the articulated bogie 10 according to this embodiment, the crossbars 24a, 24b (coupling members) are connected at first connection points 25a, 25b by passing cylindrical single pins 30a, 30b standing up from the rear axle 22 through single holes 32a, 32b formed in the crossbars, and are connected at second connection points 26a, 26b by passing cylindrical double pins 31a, 31b standing up from the front axle 21 through connecting holes 33a, 33b formed in the crossbars. Therefore, stable running of the articulated bogie 10 can be achieved with a simple coupling structure.

[0056] Although the embodiments of the present invention have been described above, the above-described embodiments are presented as examples and are not intended to limit the scope of the present invention. This novel embodiment can be embodied in various other forms. Furthermore, various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. Furthermore, this embodiment is included within the scope and spirit of the invention, and is also included in the inventions and their equivalents described in the claims. [Explanation of symbols]

[0057] 10,10a Connected cart 11 Towing vehicle 12a, 12b, 12c trolley 13 Storage section 14,15 Connection part 14a,15a connection shaft 21 Front axle 21a Axle center 21b front wheel 22 Rear axle 22a Axle center 22b rear wheel 23 Connecting Links 24 Coupler 24a, 24b Crossbar (connecting member) 25a, 25b First connection point 26a, 26b Second connection point 27a, 27b, 28a, 28b Mounting parts 30a, 30b single pin 31a, 31b double pin 32a,32b single hole 33a,33b connecting hole

Claims

1. A coupler for a connected carriage that connects multiple carriages in series and is towed by a towing vehicle, The front axle and the rear axle of the bogie are connected by a connecting link so that when one axle turns around its own axle center, the other axle turns around its own axle center in the opposite direction, The coupler is The first connection point on one end of the rear axle of the front bogie and the second connection point on the other end of the front axle of the rear bogie are connected by connecting members of the same length that intersect with each other, the connecting member is connected at the first connection point to be rotatable in response to a change in direction of the rear axle of the front bogie, and is connected at the second connection point to the front axle of the rear bogie so as to maintain a predetermined angle therebetween; Coupler for articulated bogies.

2. The connecting member is connected at the first connection point by passing a cylindrical single pin standing from the rear axle through a single hole formed in the connecting member, The connecting member is connected at the second connection point by passing a cylindrical double pin standing from the front axle through a connecting hole formed in the connecting member. The coupler for articulated bogies according to claim 1.

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