JPH027595Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to a dump mechanism in a toy dump truck, and is mainly concerned with raising and lowering the dump platform of the toy remote controlled dump truck. This invention relates to a dump mechanism for a toy dump truck which is designed to alleviate external shocks during lifting, prevent breakdowns, and ensure stable operation.

[Technical background of the invention and its problems] In the conventional dump truck toy of this type, a dump mechanism installed inside the vehicle body is operated, and the dump mechanism is operated via an elevating rod that comes out and retracts from the vehicle body. The dump bed is rocked up and down. However,
When children and young children handle it, they may suddenly press down on it when the dump bed is raised and raised.
As a result, the operating gears within the dump mechanism body could be destroyed or the delicate combinations of various parts could be misadjusted. This is one of the major causes of dump mechanism failures, and what's more, if the dump mechanism does not operate properly,
The interest of this type of dump truck toy was greatly diminished.

[Purpose of the invention] Therefore, this invention was devised in view of the existing circumstances mentioned above, and is capable of alleviating the momentary impact that is applied when the dump bed is raised and raised. The purpose is to prevent damage to the internal operating gears and their combination adjustment, and to ensure smooth operation.

[Summary of the invention] In order to achieve the above-mentioned object, this invention provides an elevating rod which is built into the vehicle body and whose upper end is pivotally connected to the bottom of the dump bed in order to raise and swing the dump bed of a toy dump truck. In a dump mechanism that swings and moves out and out of the vehicle body, the up-and-down rocking shaft of the dump bed is pivotally supported on the bearing section of the vehicle body via a shock absorbing pad made of an elastic material fitted to the bearing part, while the lower end of the lifting rod is The invention consists in forming a flexible buffer section, thereby successfully achieving the above object.

[Embodiment of the invention] An embodiment of the invention will be described below with reference to the drawings.

The symbol T shown in the figure is a predetermined dump truck toy, whose forward and reverse movement is controlled by a radio control system along with manual selection of a switch (not shown) between high-speed operation and low-speed operation. Furthermore, by selecting the same changeover switch, the forward movement and elevation of the dump platform P, that is, the up-and-down swinging, can be remotely controlled. The forward and backward movement of the dump truck toy T itself and the up-and-down rocking of the dump platform P are achieved by installing a dump mechanism D main body driven by a motor M in the vehicle body 1 to perform the traveling and up-and-down operations. This is done by remotely controlling the switch and selecting the changeover switch. In other words, a motor M, a speed reduction mechanism based on a combination of gear trains, a swinging switching gear 3, and wheels W are attached to a box-shaped container frame 2, and a sliding switch manually operated from the outside is provided. The main body of the mechanism D is configured, a selector switch is manually operated to select an operation mode, and a signal is transmitted by a radio control device. At that time, power is transmitted from the large gear on the side of the motor M to the small gear on the side of the wheel W when switching to high-speed operation, and from the small gear on the side of the motor M to the large gear on the side of the wheel W when switching to low-speed operation. It runs back and forth.

Also, when switching the dump operation, the switching gear 3 swings due to the inertia effect due to the rotational direction of the motor M.
The vehicle travels forward in response to the forward signal from the radio control device (the gear train used for this traveling is not shown), and in the opposite direction by the rotational force reversed in response to the reverse signal. The oscillating switching gear 3 causes the elevating rod 21 to protrude and retract from the vehicle body 1 while oscillating through the reduction gear train 4, the elevating gear 5, and the support arm 6 incorporated for elevating the dump platform P. The upper end of 21 is pivotally connected via a pivot portion 23 to the bottom surface of a dump loading platform P which is pivotally supported at the rear of the vehicle body 1 so as to be able to rise and fall freely. Therefore, when the oscillating switching gear 3 meshes with the starting end of the reduction gear train 4, its rotational force is sequentially decelerated and transmitted to the elevating gear 5 with which the end of the reduction gear train 4 is engaged, and this is rotated. A support arm 6, which is horizontally suspended between the elevating gear 5 and a freely rotating rotary plate disposed opposite to the elevating gear 5, revolves around the axis of the elevating gear 5. This support arm 6 has a lifting rod 21 at its lower end.
An elevating support part 22 is mounted that protrudes perpendicularly to the main body, and as the support arm 6 rotates, the elevating support part 22 slides on the support arm 6, thereby lifting the elevating rod 21 itself into the vehicle body. It is designed to appear and retract from 1 and cause the dump platform P to rise and fall.

At this time, as shown in the figure, the elevating and retracting hole 12 is curved along the swinging direction of the elevating rod 21, and the elevating and retracting hole 12 into which the elevating rod 21 with the guide tube 24 fitted therein is opened long in the swinging direction. haunted part 11
is formed on the upper wall of the vehicle body 1, and on the other hand, a cover body 25 is formed in a curved manner so that the outer circumferential surface is in sliding contact with the inner surface of the protruding/recessing part 11, and a through hole 27 into which the lifting rod 21 is inserted is opened. By doing this,
This is designed to prevent sand, dust, and other impurities from entering the main body of the dump mechanism D, and to ensure smooth operation of the dump mechanism D.

At the rear of the vehicle body 1 in which the main body of the dump mechanism D that also serves as such a traveling operation is installed, the vehicle body 1
The dump platform P is pivotally supported by a bearing portion 1A formed in the bearing portion 1A via an erecting and oscillating shaft 31 so as to be able to erect and oscillate. That is, the bearing part 1A is formed by protruding in a cylindrical shape inside the left and right side walls of the rear part of the vehicle body 1, while the pivot protrusions are located outside the left and right side walls of the vehicle body 1 on the left and right sides of the rear bottom surface of the dump platform P. 41 is vertically provided, and the undulating swing shaft 31 is inserted therethrough with the bearing portion 1A and the pivot protrusion 41 aligned, and both ends of the undulating swing shaft 31 are fixed with stoppers 42. Furthermore, in the up-and-down swing shaft 31, the bearing portion 1A
A buffer pad 32 made of rubber or an elastic material similar to rubber is fitted onto the bearing portion located inside, and is inserted into the buffer pad 32 portion 1A. The outer diameter of the buffer pad 32 itself is the same as that of the bearing part 1.
It is fitted onto the undulating swing shaft 31 through a through hole which is made approximately equal to the inner diameter of A and is opened approximately at the center;
The undulating swing shaft 31 is inserted into the bearing portion 1A.
Although it is pivoted, the up-and-down swing shaft 31 is made to be able to freely rotate so as not to inhibit the up-and-down swing of the dump platform P at all.

On the other hand, as shown in FIG.
A flexible buffer section 33 is formed at the lower end of the rod 1, and when a load is applied along the axial direction of the lifting rod 21, the entire lifting rod 21 contracts. That is, as mentioned above, in order to move the lifting rod 21 itself forward and backward in accordance with the rotation of the lifting gear 5 within the main body of the dump mechanism D, the lifting rod 21 is perpendicular to the main body so as to be placed on the support arm 6 of the lifting gear 5. The buffer pad 32 is formed by providing an opening in the lifting support part 22 protruding from the lower end thereof and making it into a closed loop shape that bends in the advancing and retreating directions. As shown in the figure, the elevating rod 21 itself has a substantially T-shape when viewed from the side, and the load (impact) applied along the forward and backward direction of the elevating rod 21 is absorbed by the front and rear portions of the outer shell forming the buffer section 33. It is absorbed by bending in the direction. The opening shape of this buffer section 33 is not limited to a shape similar to an ellipse as shown in the figure, but can be freely selected as long as flexibility of the outer part can be obtained. Of course, it is restricted by the side shape of the elevation support section 22 on which it is placed.

[Effects of the invention] This invention is configured as described above, and the dump mechanism D can be controlled by remote control using a radio control device as well as selection of operation using a changeover switch.
When activated, the elevating rod 21 comes out and retracts from the vehicle body 1 and raises and lowers the dump bed P. At this time, even if a child suddenly presses down or momentarily applies a large load when the dump bed P is raised up, the undulations and undulations that support the dump bed P The swing shaft 31 is the bearing part 1
It contacts the buffer pad 32 at A with a large frictional force and acts to prevent the rotation of the undulating swing shaft 31 itself. In addition, such a sudden impact also acts on the forward and backward directions of the lifting rod 21, and is transmitted to the buffer portion 33 formed at the lower end of the rod.
3 flexes, the entire lifting rod 21 contracts, thereby alleviating the impact.

That is, this is because the undulating swing shaft 31 of the dump bed P is pivotally supported by the bearing part 1A of the vehicle body 1 via the elastic buffer pad 32 fitted to the bearing part of the shaft 31, so that the dump bed P can be moved up and down in the upright state. Even if there is an impact on a certain dump platform
The sudden impact is alleviated by the frictional action generated between the shock absorber 1 and the shock absorbing pad 32, and further by the shock absorbing action caused by the elastic deformation of the shock absorber pad 32.

In addition, the dump platform P, which is also in an upright state,
On the other hand, even if there is a sudden impact in the forward/backward direction of the lifting rod 21, since a flexible buffer portion 33 is formed at the lower end of the lifting rod 21, the buffer portion 33
The device itself elastically deforms in response to impact and absorbs it.

Therefore, when the dump bed is being raised and swung, even if a child suddenly presses down on the dump bed while it is in an upright position, or if a momentary load is applied, the impact can be alleviated. It is possible,
It does not damage the operating gears in the dump mechanism body and their combination adjustment, prevents failures and ensures smooth operation, and has practical advantages such as being simple in structure and inexpensive. It has extremely beneficial effects.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view, and FIG. 2 is a side view of the toy dump truck with main parts cut away when the dump bed is erected. T... Dump truck toy, P... Dump truck bed, D
...Dump mechanism, M...Motor, W...Wheel, 1...Car body, 1A...Bearing portion, 2...Device frame, 3...Switching gear, 4
... Reduction gear train, 5... Lifting gear, 6... Support arm,
DESCRIPTION OF SYMBOLS 11... Projection part, 12... Projection hole, 21... Lifting rod, 22... Lifting support part, 23... Pivoting part, 24... Guide tube, 25... Cover body, 27... Penetration hole, 31... Lifting and swinging shaft, 32...Buffer pad, 33...Buffer part, 4
1... Pivot protrusion piece, 42... Stopper.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. In a toy dump truck, a dump mechanism in which a lifting rod, which is built into the vehicle body and whose upper end is pivotally connected to the bottom of the dump bed, is swung into and out of the vehicle body in order to raise and swing the dump bed. The undulating and swinging shaft of the dump bed is supported on the bearing part of the vehicle body via an elastic buffer pad fitted over the bearing part, while a flexible buffer part is formed at the lower end of the lifting rod. A dump mechanism in a dump truck toy characterized by: 2. The dump truck according to claim 1 of the utility model registration claim, wherein the buffer part is formed by providing an opening in the lifting support part that protrudes perpendicularly to the lifting rod main body and forming a closed loop shape that bends in the advancing and retreating direction. Dump mechanism in truck toys.