JPS5812885Y2 - titanper - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a portable tamper for compacting roadbeds.

In general, this type of tamper is mainly composed of a handle, a vibration generator consisting of a motor and an eccentric shaft, and a beater that performs compaction using the vibrations. A major design problem is how to prevent vibrations from being transmitted to the handle during the tamping process.

Fig. 1 shows the vibration isolation structure of a conventional tamper, in which a leaf spring 4 is inserted between the handle 1, the vibration generator 2 and the beater 3, and the vibration is absorbed by the leaf spring 4. This is done so that not much is transmitted to the handle 1.

However, in the case of a tamper with such a structure, the difference in weight between the upper and lower portions of the plate spring 4 is very large, so the handle 1 may vary depending on the condition of the beater 3 in the trackbed ballast.
If the vibration characteristics of the part change significantly, for example, when the beater 3 is deeply embedded in the trackbed ballast and its movement is restricted, or if the trackbed is solidified, the vibration will be directly transmitted to the handle 1. This has the drawback of causing large vibrations, which fatigue workers and reduce work efficiency.

Furthermore, since the center of gravity of the tamper as a whole and the mounting position of the handle 1 are far apart, it is difficult to carry and position the tamper for tamping.

Furthermore, with the structure described above, it is difficult to further improve the vibration system.

The present invention has been developed with these points in mind, and it is an object of the present invention to provide a tamper that effectively suppresses vibrations transmitted to the handlebars without being affected by the condition of the roadbed, and that is easy to carry.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 2, the tamper according to the present invention separates the vibration generating section into a motor section 5 and an eccentric shaft 6, and attaches the motor section 5 to the support section 13 of the handle 1.
It is constructed by attaching an outer cylinder 7 and an eccentric shaft 6 to the motor part 5 via a vibration-proof cylinder 8 formed of an elastic material such as rubber.

Further, the vibration-proof tube 8 is fitted into connection fittings 14 and 15 that are screwed into the bracket of the motor section 5 and the outer tube 7, respectively.

Note that the output shaft 9 of the motor M passes through the inside of the vibration isolating cylinder 8 and is connected to the eccentric shaft 6 via a flexible joint 10.
Also, the vibration isolation tube 811 of the outer tube 7! l has beater 3 and motor M
It is attached in a direction perpendicular to the output shaft 9 of.

In the figure, 11 indicates the switch case provided on the handle 1.
12 passes through the interior of the handle 1 and its support portion 13 to the switch case 11. A power cable wired to the motor section 5 is shown.

Further, in the present invention, when the vibration generating section is attached, its weight is distributed so that its vibration node A is located on the vibration isolating cylinder 8.

Note that point B in the figure indicates the center of gravity of the vibration generating section consisting of the motor section 5 and the eccentric shaft 6, and the position can be adjusted appropriately by adjusting the mounting position of the beater 3 with respect to the outer cylinder 7. I can do it.

Further, point C indicates the point where the centrifugal force exerted by the eccentric shaft 6 is applied.

In the thus constructed tamper according to the present invention, the eccentric shaft 6 is rotated by the driving force of the motor M during tamping work (at this time, the eccentric shaft 6 is rotated by the driving force of the motor M The action of the flexible joint 10 prevents the destruction of this rotation transmission part), generates vibrations, transmits the vibrations to the beater 3, and at the same time, the flexible joint 10 transmits the vibrations so that the vibrations are not transmitted to the handle side. and is absorbed by the vibration isolating cylinder 8.

At this time, since the overall weight is distributed so that the vibration node A is located on the vibration isolating cylinder 8 as described above, vibrations are effectively absorbed by the vibration isolating cylinder 8.

At the same time, since the motor section 5 is directly attached to the handle support section 13, the weight on the handle 1 side is increased.
The vibration characteristics applied to the handle 1 do not change significantly depending on the condition of the beater 3 in the track bed ballast as in the conventional case, and stable tamping work can be performed in any condition.

In addition, in the titan tamper according to the present invention, the entire center of gravity is close to the handle 1, so it is easy to carry.
It is easier to position the tamping.

Furthermore, the overall structure is simplified, and in particular, since the motor M of the vibration generating part and the eccentric shaft 6 are provided separately, the design of the eccentric shaft 6 and the beater 3 can be easily changed. At the same time, it is possible to easily take anti-vibration measures by changing the shape, size, etc. of the anti-vibration cylinder 8 in accordance with the change.

As described above, in the tamper according to the present invention, the motor section is separated from the vibration generating section, the motor section is directly attached to the handle support section, and the vibrating section is provided on the motor section via the vibration isolating tube. By attaching an eccentric shaft to the output shaft via a flexible joint and distributing the entire weight so that its vibration node is located on the vibration-isolating cylinder, vibrations transmitted to the handlebars are effectively suppressed regardless of the condition of the trackbed. In addition, since the overall height of the machine is higher than the previous one, the beater can be easily positioned and the workability of tamping can be significantly improved.

In addition, since the beater is installed perpendicular to the motor shaft, the tip of the beater makes an elliptical motion centered on point A, which provides the necessary vibration acceleration in both the This has the advantage that the beater can penetrate easily.

[Brief explanation of the drawing]

Figure 1 is a simplified configuration diagram showing a conventional simple type tamper.
FIG. 2 is a partially sectional front view showing a tamper according to an embodiment of the present invention. 1... Handle, 2... Vibration generating part,
3... Beater, 4... Leaf spring, 5...
... Motor section, 6 ... Eccentric shaft, 7 ...
... Outer cylinder, 8 ... Vibration isolation tube, 9 ... Output shaft, 10 ... Flexible joint, 11 ... Switch case, 12 ... ...Power cable, 13.
...Handle support part, 14.15... Connection fittings, A... Vibration node, B... Center of gravity position of vibration generating part, C... ...The point of application of the centrifugal force due to the eccentric shaft 6.

Claims (1)

[Scope of utility model registration request] It has a motor section attached to the support section of the handle, an eccentric shaft connected to the output shaft of the motor section, and a beater attached to the outer cylinder of the eccentric shaft. The beater is provided in the outer cylinder so that the axial directions coincide and are perpendicular to the axial direction, and the motor part and the outer cylinder of the eccentric shaft are connected via a vibration-proof cylinder, and the output shaft of the motor part and the Titanoku is connected to an eccentric shaft via a flexible joint.