Cab lock device and vehicle

Abstract

To provide a cab lock device and a vehicle that are able to prevent movement of a main hook relative to a hook pin.SOLUTION: A cab lock device according to an embodiment includes: a hook pin supported by a vehicle frame; a main hook provided in a cab and capable of engaging with the hook pin; and a sub-hook rotatably supported by the main hook and having an engagement portion disposed to face the hook pin on a side opposite to a direction in which the main hook moves relative to the hook pin when the main hook disengages.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a cab locking device and a vehicle.

Background Art

[0002] In a vehicle such as a truck, in order to service the components provided directly below the cab, the cab is configured to be tiltable with respect to the frame. For this reason, a cab locking device for fixing the cab to the frame is provided. The cab locking device includes, for example, a main hook provided on the cab side and a hook pin provided on the frame side, and engages the cab with the frame by hooking the main hook on the hook pin.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In such a cab locking device, for example, when the vehicle makes an emergency stop, such as when a collision mitigation brake (AEB) operates, the main hook may move relative to the hook pin.

[0005] An object of the present invention is to provide a cab locking device and a vehicle that can suppress movement of the main hook relative to the hook pin.

Means for Solving the Problems

[0006] The cab lock device according to one embodiment includes a hook pin supported by a vehicle frame, a main hook provided on the cab and engageable with the hook pin, and a sub-hook rotatably supported by the main hook and having an engaging portion disposed opposite to the hook pin on the side opposite to the direction in which the hook pin moves relative to the main hook when the main hook is disengaged.

Advantages of the Invention

[0007] According to the present invention, it is possible to provide a cab lock device and a vehicle capable of suppressing pitching.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Modes for Carrying Out the Invention

[0009] Hereinafter, the cab lock device 20 and the vehicle 1 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5. FIG. 1 is a perspective view showing a partial configuration of the vehicle 1. FIG. 2 is a perspective view showing an enlarged configuration of the cab lock device 20 of the vehicle 1. FIGS. 3 to 5 are perspective views showing the configuration and operation of the cab lock device. In the figures, X, Y, and Z respectively indicate three mutually orthogonal directions. As an example, the width direction of the vehicle is X, the front-rear direction is Y, and the height direction is Z. Note that, for the sake of explanation in each figure, the configuration is appropriately enlarged, reduced, or omitted.

[0010] The vehicle 1 shown in FIGS. 1 and 2 is, for example, a truck. The vehicle 1 includes a chassis frame 10 (vehicle frame), a plurality of tires 11 suspended from the chassis frame 10 via a suspension device, a cab 12 provided at the front portion of the chassis frame 10, a pair of cab lock devices 20, and various in-vehicle devices such as an engine and a power transmission device mounted on the chassis frame 10. The vehicle 1 is a cab-over truck in which the front end portion side of the cab 12 is supported so as to be tiltable about a tilt axis in the vehicle width direction with respect to the chassis frame 10.

[0011] The chassis frame 10 is, for example, a ladder frame, and includes a pair of side members 13 extending in the front-rear direction (second direction) of the vehicle 1 and a plurality of cross members extending in the vehicle width direction (first direction) and bridging between the side members 13. Mounting frames 31 to which the cab lock devices 20 are respectively attached are provided on the pair of side members 13 of the chassis frame 10.

[0012] The cab 12 is provided at the front end portion of the chassis frame 10. The cab 12 is supported so as to be tiltable about an axis along the vehicle width direction with respect to the chassis frame 10. Cab lock devices 20 are respectively provided on both sides in the vehicle width direction of the rear surface of the cab 12.

[0013] The pair of cab lock devices 20 includes a pin holding portion 30 provided on the chassis frame 10, a hook pin 35 supported by the pin holding portion 30, a hook support portion 40 provided on the cab 12, a main hook 50 supported by the hook support portion 40, and a sub-hook 60 provided on the main hook 50.

[0014] The pin holding portion 30 includes a mounting frame 31 attached to the side member 13, a pin bracket 32 provided at the upper end portion of the mounting frame 31, and a pair of support plates 33 supported by the pin bracket 32 and extending upward.

[0015] The mounting frame 31 is a frame member that extends obliquely outward and upward in the vehicle width direction from a predetermined position of a pair of side members 13. A pin bracket 32 is provided on the upper surface portion of the tip end of the mounting frame 31.

[0016] The pin bracket 32 is a curved member that opens upward. The pin bracket 32 is provided, for example, on the mounting frame 31 via a packing such as a rubber material. A pair of support plates 33 are provided on the upper surface portion of the pin bracket 32.

[0017] The pair of support plates 33 are erected upward from the pin bracket 32. The support plates 33 are configured in a thin plate shape whose thickness direction is along the vehicle front-rear direction. The pair of support plates 33 are arranged opposite to each other with a space therebetween in the vehicle front-rear direction. Support holes 33a, which are through holes, are formed at the upper end portions of the support plates 33. The pair of support plates 33 hold a hook pin 35 that is bridged through the pair of support holes 33a.

[0018] The hook pin 35 is a shaft member that extends in the vehicle front-rear direction. The hook pin 35 is supported at a predetermined position of the side member 13 via a pin holding portion 30. The hook pin 35 is arranged through the pair of support holes 33a and is fastened and supported by the support plates 33.

[0019] The hook support portion 40 includes a base plate 41, a bracket 42, a link member 43, and a first shaft 44 that is a rotation shaft.

[0020] The base plate 41 is configured in a plate shape made of metal or the like. For example, the base plate 41 is joined to the back surface of the cab 12 by welding or the like.

[0021] The bracket 42 is fastened to the rear vehicle side surface of the base plate 41 with a fastening member such as a screw. That is, the bracket 42 is connected to the back surface of the cab via the base plate 41. The bracket 42 integrally has a bottom plate portion 42b having a hole portion 42a, and a pair of side arms 42c, 42c extending upward from both the left and right sides of the bottom plate portion 42b, and is configured in a curved shape with an upper opening. The bottom plate portion 42b has a hole portion 42a penetrating in the vertical direction. For example, from below the bracket 42, a pair of support plates 33 extend upward through the hole portion 42a, and the tip portions where the support holes 33a of the support plates 33 are formed are disposed above the bottom plate portion 42b.

[0022] The link member 43 integrally and continuously includes a pair of link plates 43a, 43a having link holes 43c, and a connection plate 43b connecting the pair of link plates 43a, 43a.

[0023] The pair of link plates 43a, 43a are configured in a triangular plate shape. The pair of link plates 43a, 43a are arranged along a plane perpendicular to the front-rear direction. The pair of link plates 43a, 43a are arranged side by side at a predetermined distance in the vehicle front-rear direction. The link holes 43c, 43c are disposed at the upper end portions of the link plates 43a, 43a and at one end portion in the vehicle width direction.

[0024] The first shaft 44 is a shaft member supported through the link holes 43c, 43c of the pair of link plates 43a, 43a. The first shaft 44 extends in the vehicle front-rear direction and rotatably connects the main hook 50 to the link plates 43a, 43a. For example, in the first shaft 44, a spacer or a spring material may be interposed between the link plates 43a, 43a and the main hook 50.

[0025] The main hook 50 is configured in a plate shape along a plane orthogonal to the vehicle longitudinal direction and is rotatably attached to the first shaft 44. The main hook 50 is configured to rotate about the first shaft 44 along the vehicle longitudinal direction, rotate in a plane orthogonal to the vehicle longitudinal direction, and be engageable or disengaged with the hook pin 35. That is, the posture of the main hook 50 changes between a holding position for holding the hook pin 35 and a release position for releasing the hook pin 35. For example, the main hook 50 rotates in the locking direction R1, which is counterclockwise about the first shaft 44, from the release position shown by the dashed line in FIG. 5, and enters a locked state in which the receiving surface 53a engages with the hook pin 35 as shown by the solid line. On the other hand, the main hook 50 rotates in the release direction R2, which is clockwise about the first shaft 44, from the locked position shown by the solid line in FIG. 5, and enters a released state in which the hook pin 35 is disengaged from the receiving surface 53a as shown by the dashed line.

[0026] The main hook 50 integrally includes a hook base 51 having a first shaft hole 51a through which the first shaft 44 passes, an extension portion 52, and a return portion 53.

[0027] The hook base 51 has a first shaft hole 51a through which the first shaft 44 along the vehicle longitudinal direction passes at the upper end portion. The hook base 51 extends toward the other side in the vehicle width direction from the first shaft hole 51a in the locked state.

[0028] The extension portion 52 bends or curves downward and extends from the tip of the hook base 51 on the other side in the vehicle width direction from the first shaft hole 51a in the locked state. In the extension portion 52, a second shaft hole 52a, which is a through hole through which a second shaft 64, which is a rotation shaft along the vehicle longitudinal direction, passes, is formed at a predetermined position below the first shaft hole 51a of the hook base 51.

[0029] The return portion 53 protrudes toward one side in the vehicle width direction from the lower end portion of the extension portion 52. The return portion 53 bends or curves from the tip of the extension portion 52 and protrudes toward one side in the rotation direction. The return portion 53 is caught and engaged with the outer periphery of the hook pin 35 to hold the hook pin 35.

[0030] The inner edge of the bent portion of the return portion 53 constitutes a main receiving surface 53a that is disposed opposite to at least a part of the outer periphery of the hook pin 35. The main receiving surface 53a is a curved surface that is disposed opposite to the circumferential surface portion on one side of the hook pin 35 and is disposed opposite to the lower portion of the circumferential surface portion of the hook pin 35. For example, the main receiving surface 53a faces the outer peripheral surface of the hook pin 35 at a circumferential angle of 1 / 3 or more and less than half a turn in the outer peripheral direction of the hook pin 35. As an example, in the locked state, the main receiving surface 53a has a curved shape that opens upward, and the base end side portion of the main hook 50 is disposed on the other side portion in the vehicle width direction of the hook pin 35, and the tip end side portion is disposed on the one side portion in the vehicle width direction of the hook pin 35, thereby engaging with the hook pin 35 and holding the hook pin 35. For example, on the tip end side of the main receiving surface 53a of the main hook 50, an engaging protrusion 53b that protrudes inward of the curve is formed. In the locked state, the gap between the main receiving surface 53a and the circumferential surface of the hook pin 35 is configured to be smaller than the diameter of the hook pin 35. For example, in the locked state, the receiving surface 53a of the main hook 50 abuts against the circumferential surface of the hook pin 35.

[0031] For example, the main hook 50 is tightened or biased to such an extent that rotation due to its own weight in the free state is restricted and is interposed in the first shaft 44. Specifically, for example, it is biased by a spacer or a spring member provided between the main hook 50 and the pair of support plates 33, and rotation of the main hook 50 due to its own weight is restricted. For example, the main hook 50 is configured to be rotatable by an external force such as manual operation or lever operation.

[0032] The sub-hook 60 is rotatably attached to the main hook 50 by a second shaft 64. The sub-hook 60 is configured in a plate shape along a plane orthogonal to the vehicle front-rear direction. The sub-hook 60 is configured in a return shape that integrally includes a hook base 61 having a first shaft hole 61a through which the second shaft 64 passes, an extension portion 62, and a return portion 63 as an engaging portion.

[0033] For example, the sub-hook 60 is rotatably attached by manual or other operations during maintenance or the like in the sub-block direction R3 that rotates clockwise in FIG. 5 and the sub-release direction R4 that rotates counterclockwise. For example, the sub-hook 60 rotates in the sub-block direction R3 that is clockwise about the second shaft 64 disposed in the second shaft hole 52a of the main hook 50, so that the sub-receiving surface 63a engages with the hook pin 35 to be in a locked state. On the other hand, the sub-hook 60 rotates in the sub-release direction R4 that is counterclockwise about the second shaft 64 from the locked state, so that the hook pin 35 is disengaged from the receiving surface 63a to be in a released state.

[0034] The hook base 61 has a first shaft hole 61a through which the second shaft 64 passes.

[0035] The extending portion 62 extends from the hook base 61 toward one side and downward in the vehicle width direction in the locked state.

[0036] The return portion 63 is configured in a curved shape that curves downward from the end on one side in the vehicle width direction of the extending portion 62, further passes through one side in the vehicle width direction, and returns to the other side in the vehicle width direction. That is, the sub-hook 60 forms a curved portion that opens toward the other side in the rotation direction. The return portion 63 is caught and engaged with the outer periphery of the hook pin 35 to hold the hook pin 35.

[0037] The inner edge of the curved portion of the return portion 63 constitutes a sub-receiving surface 63a that is disposed to face at least the primary side in the release direction of the main hook 50 among the outer periphery of the hook pin 35. The sub-receiving surface 63a is a curved surface disposed to face the peripheral surface on one side of the hook pin 35, and is disposed to face the peripheral surface on the upper side on one side in the rotation direction of the main hook 50 of the hook pin 35. For example, the sub-receiving surface 63a faces the hook pin 35 at a circumferential angle of 1 / 3 or more and less than half a turn in the outer peripheral direction of the hook pin 35. In the locked state, the gap between the sub-receiving surface 63a and the peripheral surface of the hook pin 35 is smaller than the diameter of the hook pin. For example, in the locked state, the sub-receiving surface 63a abuts against the peripheral surface of the hook pin 35.

[0038] The sub-hook 60 is disposed opposite to the side where the hook pin 35 moves relative to the main hook 50 when the main hook 50 is disengaged. That is, the sub-receiving surface 63a of the sub-hook 60 is disposed opposite to the side of the hook pin 35 opposite to the direction in which the main hook 50 moves relative to the hook pin 35 when the main hook 50 is disengaged. In other words, it can be said that each of the main hook 50 and the sub-hook 60 has a portion engaging with the hook pin 35 provided with the hook pin 35 therebetween. Note that the engaging portion (sub-receiving surface 63a) of the sub-hook 60 does not necessarily always contact the hook pin 35 during normal operation of the vehicle. As will be described later, it is only necessary that the sub-hook 60 be arranged to engage with the hook pin 35 when a force is applied such that the main hook 50 comes off due to an unintended behavior. As a specific example, the sub-hook 60 is disposed opposite to the secondary side in the locking direction R1, that is, the primary side in the release direction R2, on the peripheral surface of the hook pin 35.

[0039] As shown in FIG. 5, in the locked state, the first shaft 44 is disposed above and on one side in the left-right direction with respect to the hook pin 35. On the other hand, the second shaft 64 is disposed above and on one side in the left-right direction with respect to the hook pin 35. The second shaft 64 is disposed below and on the other side in the left-right direction than the first shaft 44. That is, in the vehicle width direction and the up-down direction, the second shaft 64 is disposed at a position between the first shaft 44 and the hook pin 35, and the second shaft 64 is disposed closer to the hook pin 35 than the first shaft 44.

[0040] The cab locking device 20 is normally maintained in the locked state. For example, when tilting the cab 12 during maintenance, the main hook 50 can be rotated in the release direction (clockwise in the figure) by operating a lever or the like to release the holding of the hook pin 35, thereby bringing it into a tiltable release state.

[0041] In the cab lock device and the vehicle configured as described above, when a contributing force F1 to the phenomenon of slipping in the direction in which the main hook 50 comes off from the hook pin 35 occurs during sudden braking, since the sub-hook 60 is hooked on the hook pin 35, a reaction force F2 opposing the force F acts, and the slipping of the main hook 50 can be suppressed. As a result, the phenomenon that the cab 12 side separates from the chassis frame 10 during sudden braking can be suppressed, and pitching during sudden braking can be suppressed.

[0042] As described above, one embodiment of the present invention has been described in detail. However, the present invention is not limited to the above-described embodiment, and can be appropriately modified, improved, etc. The present invention is defined by the scope of the claims, and includes all changes within the meaning and scope equivalent to the scope of the claims.

Explanation of Reference Numerals

[0043] 1... vehicle, 10... chassis frame, 11... tire, 12... cab, 13... side member, 20... cab lock device, 30... pin holding part, 31... mounting frame, 32... pin bracket, 33... support plate, 33a... support hole, 35... hook pin, 40... hook support part, 41... base plate, 42... bracket, 42a... hole part, 42b... bottom plate part, 42c... side arm, 43... link member, 43a... link plate, 43c... link hole, 44... first shaft, 50... main hook, 51... hook base, 51a... first shaft hole, 52... extending part, 52a... second shaft hole, 53... return part, 53a... main receiving surface, 60... sub-hook, 61... hook base, 61a... first shaft hole, 62... extending part, 63... return part, 63a... sub receiving surface, 64... second shaft, R1... lock direction, R2... release direction, R3... sub-lock direction, R4... sub-release direction.

Claims

1. A hook pin supported by a vehicle frame, a main hook provided in a cab and engageable with the hook pin, a sub-hook rotatably supported by the main hook and engageable with the hook pin, comprising: each of the main hook and the sub-hook has a portion that engages with the hook pin with the hook pin therebetween Cab locking device.

2. The sub-hook has an engaging portion that engages with the hook pin, the engaging portion is disposed on a side opposite to the direction in which the main hook moves relative to the hook pin when the main hook is disengaged from the hook pin with respect to the hook pin The cab locking device according to claim 1.

3. The hook pin has an axis extending in the longitudinal direction of the vehicle, the main hook is rotatably supported by the cab and has a main receiving surface disposed opposite to at least one side of the outer periphery of the hook pin in the locked state, the sub-hook has a sub-receiving surface disposed opposite to a primary side portion of the circumferential surface of the hook pin in the relative movement direction of the main hook when the main hook and the hook pin are disengaged, The cab locking device according to claim 2.

4. A first axis that is a rotation axis of the main hook and a second axis that is a rotation axis of the sub-hook with respect to the main hook are disposed above the hook pin. The cab locking device according to claim 3.

5. The cab locking device according to any one of claims 1 to 4, a vehicle frame, a cab provided on the vehicle frame, A vehicle comprising.

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