JPS6336872Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a sliding part structure of a lever member of a tail cab, and in particular, to a structure in which a lever member that swings due to relative movement in the vehicle width direction between the cab and the vehicle body frame is brought into a predetermined position. The present invention relates to a sliding part structure of a lever member of a tail cab for returning to its original position.

[Technical background of the invention and its problems] Generally, cab-over type vehicles are equipped with a tail mechanism such as a torsion bar type or a hydraulic cylinder type. As shown in FIG. 1, the cab 1 is tilted with the frame side end 3a of the link arm 3, whose both ends 3a and 3b are rotatably connected to the vehicle body frame 2 and the cab 1, as the tail center. It is configured.

Conventionally, this type of tilt cab is provided with a lever member 4 for transmitting a tilt force from a torsion bar, a hydraulic cylinder, etc. to tilt the cab 1. This lever member 4 is eccentric from the tail center, and its base end 4a is rotatably connected to the vehicle body frame 2 side, and the swing end 4b extending toward the rear of the cab 1 is slidable on the lower surface of the cab 1. The cab 1 is brought into contact and tilted while being rotated by a torsion bar or the like. Further, the lower surface of the cab 1 on which the swinging end 4b of the lever member 4 comes into contact is provided with a rubber material for vibration absorption.
A rotating roller member 5 is provided to allow sliding movement of the roller. This is because the base end 4a of the lever member 4 is eccentric from the tail center of the cab 1, so that the tailing trajectory of the cab 1 and the pivoting trajectory of the pivoting end 4b of the lever member 4 are different, causing relative slippage.

By the way, in the conventional sliding portion structure of the lever member, the rotating roller member 5 is formed in a simple cylindrical shape, and the flat pivot end 4b is brought into contact with the cylindrical surface. Therefore, when the vehicle body frame 2 and the cab 1 move relative to each other in the vehicle width direction when the vehicle is running, the pivot end 4b of the lever member 4 whose base end 4a is connected to the vehicle body frame 2 becomes a rotating roller member. There was a problem in that the rubber material that elastically supports the rotating roller member 5 was subjected to an uneven load, which deteriorated its durability. . Further, stoppers (not shown) provided at both ends of the rotating roller member 5 and used to prevent the swinging ends 4b swinging in the vehicle width direction from coming off the cylindrical surface also wear out.

[Purpose of the invention] The present invention was devised in view of the above-mentioned problems, and its purpose is to improve the soundness and reliability of the swinging lever member by actively returning it to a predetermined position. The purpose of the present invention is to provide a sliding part structure of a lever member of a tail cab that allows the sliding part to be moved.

[Embodiment of the invention] A preferred embodiment of the invention will be described below in detail with reference to the accompanying drawings.

FIG. 2 shows a tilted cab with suspension. Body frame 2 and cab 1
A link arm 3, whose both ends are rotatably supported via brackets 7 and for regulating the tail trajectory of the cab 1, is interposed between the cab 1 and the cab 1. The frame side end 3a of this link arm 3 forms a tail center. Also, between the cab 1 and the body frame 2, a shock absorber 8 and a leaf spring 9 are provided.
A suspension 6 consisting of the following is interposed. On the other hand, a base end 4a of a lever member 4 is rotatably connected to a bracket 7 provided on the vehicle body frame 2, eccentrically from the tail center. This lever member 4 is configured to tilt the cab 1 by transmitting a tilting force from a torsion bar, hydraulic cylinder, etc. (not shown). The lever member 4 has a pivoting end 4b, which is an abutting end extending toward the rear of the cab 1, in contact with the lower surface of the cab 1. cab 1
A rotating roller member 1 that allows sliding movement of the lever member 4 while contacting the pivot end 4b of the lever member 4 is provided on the lower surface of the lever member 4.
0 is set. The lever member 4 has a pivot end 4b that moves relative to the cab 1 due to the cab tail or vibrations during running, and the rotating roller member 1
It is designed so that it can be smoothly slid in the vehicle length direction by 0 rotation. The above configuration is substantially the same as the conventional one.

The feature of the present invention is that when the cab 1 and the vehicle body frame 2 move relative to each other in the vehicle width direction due to vibrations during driving, the pivot end 4b of the lever member 4 swings relative to the vehicle width direction. The movement is performed at a predetermined position (approximately the central portion along the axial direction of the rotating roller member 10).
This is because a receiving groove is formed in the rotating roller member 10 to guide the sliding movement of the swing end 4b so that the rotating roller member 10 returns to its original position.

To explain the sliding part structure in more detail, as shown in FIG. 3, this structure mainly includes a rotating roller member 10, a support seat 11 serving as a retainer for rotatably supporting the rotating roller member 10, and a rotating roller member. 10 elastically supported on the cab 1 side. The elastic buffer member 12 is made of a flexible synthetic resin material or the like, and has a function of buffering vibrations caused by running. This elastic buffer member 12 is
A support seat 11 and a flat mounting seat 13 are provided on the front and back sides respectively.
and is provided. The mounting seat 13 is a seat for mounting the entire sliding part structure on the cab 1 side. In particular, the elastic buffer member 12 is formed by expanding outward in the axial direction of the rotating roller member 10, and when elastically supporting the support seat 11 on the lower surface of the cab 1, the elastic buffer member 12 is outside the movement range of the pivot end 4b of the lever member 4. The supporting seat 11 is supported from the opposite direction, and the tilting of the rotating roller member 10 is suppressed by pressing on the expanded portion thereof. That is, if the width of the elastic buffer member 12 is narrow and is equal to or less than the movement range of the swing end 4b (approximately the axial length of the rotating roller member 10), the contact force of the swing end 4b will be reduced as explained in the related art. Elastic buffer member 1
2 causes the support seat 11 and the rotating roller member 10 to tilt significantly, impairing the smoothness of rotation of the rotating roller member 10 and making it impossible to accurately allow sliding of the swing end 4b. Therefore, the elastic buffer member 12 is made wider. It was formed in The support seat 11 is formed as a rigid structure in which flat plate members are welded together. Stoppers 14 are vertically provided on the support plate 15 at predetermined intervals, facing each other so as to sandwich the lever member 4 from the vehicle width direction. This stopper 14... is the lever member 4
The swing end 4b is configured to prevent swinging movement in the vehicle width direction and separation from the rotating roller member 10. A surface 14a of the stopper 14 on the side opposite to the lever member 4 is provided with a
A plurality of rib members 16 are spanned from the support plate 15 side. A pin body 17 is installed along the vehicle width direction between the stoppers 14 formed in this way, and the rotary roller member 10 is rotatably supported on this pin body 17 via collars 18 .

The rotating roller member 10 guides the sliding movement of the swing end 4b of the lever member 4 in the vehicle length direction, and especially when the swing end 4b swings in the vehicle width direction. Receiving grooves 19 are formed to guide automatic sliding movement from the ends 10b... side to the center 10a side. This receiving groove 19 is
It is formed over the entire circumference of the rotating roller member 10 by tapered slopes 10c that gradually become deeper from the axially opposite ends 10b toward the center 10a. Also, the surface of the pivoting end 4b of the lever member 4 on the side that comes into contact with the rotating roller member 10 is connected to the receiving groove 19.
Both ends 4c are substantially aligned with the slope 10c forming the
It is formed by a tapered slope 4e whose wall thickness gradually increases from the ... side toward the center 4d side.

With this configuration, when the turning end 4b moves toward the one end 10b of the rotating roller member 10, the load P caused by the pressing of the turning end 4b against the rotating roller member 10 is moved toward the center 10a due to the wedge effect. A force F is generated, and the turning end 4b is automatically returned to the center 10a of the rotating roller member 10. The turning end 4b, which has moved from the one end 10b side of the rotating roller member 10 to the center 10a, moves to the center 10 due to the close contact between the other slope 4e and the other slope 10c of the rotating roller member 10, which had been separated until then.
Movement from a to the other end 10b is restricted.

If the swing end 4b can be returned to the predetermined position positively in this way, the period during which an unbalanced load acts on the elastic shock absorbing member 12 can be reduced and its performance can be exhibited for a long period of time, and the swing end 4b can be The wear of the stoppers 14 can be suppressed by reducing the frequency of positions at both ends 10b of the rotating roller members 10,
The soundness and reliability of the sliding part structure can be improved.

In the above embodiments, the explanation has been given by exemplifying a tilted cab with a suspension, but it goes without saying that the same effect can be achieved even in a rigid type of tilted cab that does not have a suspension mechanism. Being prepared for this will have a greater effect.

[Effects of the invention] In summary, according to the present invention, the following excellent effects are achieved.

(1) The lever member, which swings relative to each other due to the relative movement in the vehicle width direction between the cab and the body frame due to vibrations during running, can be automatically returned to the specified position, improving the soundness of the sliding part structure. , reliability can be improved.

(2) The structure is simple and can be easily adopted.

(3) In a structure that employs a rotating roller member and elastically supports the retainer of the rotating roller member, the elastic buffer member is formed to expand outward in the axial direction of the rotating roller member, so that it is not affected by the contact force. The inclination of the rotating roller member can be suppressed to maintain its axis, and the abutting end can be smoothly slid.

[Brief explanation of the drawing]

Fig. 1 is a schematic side view showing a conventional example, Fig. 2 is a side view around the front suspension showing an example in which the present invention is adopted, and Fig. 3 is a side view showing a preferred embodiment of the present invention.
It is a sectional view taken along the - line in the figure. In the figure, 1 is a cab, 4 is a lever member, 4b is a swinging end which is its abutting end, 4e is its slope, 10 is a rotating roller member, 10c is its slope, 11 is a support seat which is a retainer, and 12 is an elastic buffer. The member 19 is a receiving groove.

Claims (1)

[Claims for Utility Model Registration] (1) A rotating roller member that allows the abutting end of a lever member that comes into contact with the lower surface of the cab to transmit tailing force to slide, and a holder that rotatably supports the rotating roller member. an elastic buffer member that is formed to expand outward in the axial direction to hold the axis of the rotating roller member and elastically supports the cage on the lower surface of the cab; A sliding part structure of a lever member of a tail cab, which is provided with a receiving groove formed by a tapered slope that gradually becomes deeper toward the center. (2) from both ends to the center along the axial direction of the rotating roller member so that the lever member is slid toward the center of the rotating roller member along the slope forming the receiving groove; The sliding part structure of a lever member of a tail cab according to claim 1, which is formed by a tapered slope that becomes thicker in the direction.