JPS5824562B2 - Taitampa - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is aimed at minimizing the vibration transmitted from the vibrating part of the titanpa to the worker's hand through the bundle during work in a titanpa used for compacting roadbed gravel under railroad ties, etc. This is about a titanpa that has been made smaller.

As shown in FIG. 1, the conventional titanpa is provided with a shock absorbing support shaft 4 made of an elastic material such as polyurethane rubber approximately in the center of the bundle 2, and the upper bearing of the vibration motor 3 is attached to the lower end of the support shaft 4. Fit the mounting part 5 of the casing 8, and tighten the tightening metal fitting 7.
to attach the vibration motor 3 to the support shaft 4.

A beater 6 is attached to the vibration motor 3 to constitute a vibration section 18.

Further, the lead wire 9 of the vibration motor 3 is connected to the hollow part 1 of the support shaft 4.
0 through the groove 11 of the bundle 2 and is connected via a switch 12 to a cable 13 with a socket 14 .

The vibration motor 3 can be started and stopped by connecting the socket 14 to an external power source (not shown) and operating the switch 12.

Moreover, one eccentric weight 16 is attached to the shaft end of the rotating shaft 15 of the vibration motor 3, and when the rotating shaft 15 rotates,
A centrifugal force is generated in the eccentric weight 16, and the vibrating part 18 vibrates in a conical shape with a point on the center line of the rotating shaft 15 of the vibration motor 3 as the apex.

If this vibration is defined as a rotational vibration, and the apex of the conical surface is defined as a nodal point of the rotational vibration, the beater 6 vibrates due to this rotational vibration, and the vibrating beater 6 is thrust into the gravel of the roadbed below the railroad ties. The vibrations are transmitted to the roadbed gravel via the beater 6, and the roadbed gravel is compacted.

On the other hand, the vibrations are transmitted to the operator's hands via the support shaft 4 and the bundle 2.

If the vibration transmitted to the worker's hands is large, the worker's fatigue will increase and work efficiency will decrease.

For this reason, the vibration transmitted to the operator's hands must be kept as small as possible.

For this purpose, the node of rotational vibration of the vibrating part 18 may be located near the bundle 2.

In general, in a vibrating body that has a rotating shaft to which one eccentric weight is attached and generates rotational vibration due to the centrifugal force acting on the eccentric weight due to rotation of the rotating shaft, the position of the nodal point of concave point vibration and the vibration The following relationship exists between the position of the body's center of gravity and the point of application of centrifugal force generated by eccentric weight.

That is, in FIG. 2, it is assumed that the original position of the center line of the vibrating body 1 is OM, that this has assumed the ON position due to rotational vibration, and that the angle formed by OM and ON is θ.

0 is the position of the nodal point of rotational vibration of the vibrating body 1.

Now Ol: Point G of centrifugal force generated by eccentric gravity:
Center of gravity W of the vibrating body 1 : Weight of the vibrating body 1 dW : Weight of any part of the vibrating body 1 lo = Distance f between the node 0 of rotational vibration and the point O0 of centrifugal force generated by eccentric weight: f of the vibrating body 1 Distance e between center of gravity G and point 01 of centrifugal force generated by eccentric weight: Distance el between center of gravity G of vibrating body 1 and weight dw of any part of vibrating body 1: Center of gravity G of vibrating body 1 and lower end of vibrating body 1 Distance e2: Distance R between the center of gravity G of the vibrating body 1 and the node O of rotational vibration: Radius of rotation IG of the weight dw of any part of the vibrating body 1:
Assuming that the moment of inertia ω around the center of gravity G of the vibrating body 1 is: the rotational angular velocity g of the vibrating body 1: the gravitational acceleration of the earth.

Therefore, the resultant force H of the entire centrifugal force of the vibrating body 1 with weight W is:
If node 0 is the origin, in order for H of and to act on point 0, however, from Figure 2, 13 = 1of + e,
If the origin is the center of gravity G of the vibrating body 1, e is -e2 from el.
Therefore, if we know the position of the center of gravity G of the vibrating body 1 and the position of the point 01 of the centrifugal force generated by the eccentric weight, we can find the position of the node 0 from equation (a). .

However, as can be seen from Figure 1, the conventional titanpa
A vibrating section 18 composed of a vibrating motor 3 and a beater 6 is
Corresponding to the vibrating body 1 in FIG. 2, the vibrating motor 3 is usually designed and manufactured to have an eccentric weight 16 mounted close to the rotor 17 and to be as small as possible. Since motor 3 has the largest weight, vibration part 1
The position of the center of gravity of 8 is controlled by the vibration motor 3, and is located approximately midway between the center of the vibration motor 3 and the eccentric weight 16, so f
Since the value of is small and there is only one eccentric weight 16, the position of the point 01 of the centrifugal force is determined, and the position of the center of gravity G of the vibrating section 18 is also determined.

In addition, the moment of inertia l-I of the vibrating part 18 around the center of gravity G
.

is a large value because the beater 6 is located away from the center of gravity G to the left and extends long in the vertical direction.

Therefore, the second term of equation (a) becomes a large value, and the value of lo becomes large.

Therefore, the rotational vibration node 0 is far above the bundle 2, and in order to have the rotational vibration node 0 close to the bundle 2, the moment of inertia of the beater 6 around the center of gravity G must be made as small as possible. It was, of course, extremely difficult.

Therefore, even if the support shaft 4 is made of an elastic material, the effect is small and the bundle 2 portion vibrates greatly, which increases worker fatigue and reduces work efficiency, as mentioned above. It couldn't be avoided.

In view of the above points, the present invention creates an eccentric moment, which is the distance between the center of gravity of the eccentric weight and the center of rotation of the eccentric weight, multiplied by the weight of the eccentric weight, at a fixed interval on the rotation axis of the vibration motor. Two sets of eccentric weights that can be adjusted arbitrarily are installed in phase 1 of their mounting positions.
They are installed 80 degrees apart, and each eccentric weight is set to a different eccentric moment, so that the point of application of the resultant force of centrifugal force can be set arbitrarily. The distance f between the points of application of the centrifugal force is made variable, so lo in equation (a) is made variable, and the position of the rotational vibration node of the vibrating part is arbitrarily set so that the rotational vibration node is always near the bundle. Adjustable type.

It is intended to provide a

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 3 is a sectional view of essential parts of an embodiment of the present invention, FIG. 4 is a view taken along arrow A in FIG. 3, FIG. 5 is a sectional view taken along line B-jB in FIG. 3, and FIG. Figure 7 is a sectional view of the main part of the front of the
-C sectional view, FIG. 8 is a diagram showing the relationship between the point of application of the resultant force of the centrifugal force of the titanper shown in FIG. 3, the center of gravity of the vibrating part, and the position of the rotational vibration node. FIG. This is a front view of another embodiment.

As shown in FIG. 3, the damper 21 of the present invention includes a bundle 22, a buffer body 29, a vibration motor 23, and a beater 2.
The vibrating section 55 consists of 6 parts.

2. As shown in FIG. 5, the buffer body 29 is constructed by bonding an elastic material 60 such as rubber between an outer cylinder 56 and an inner cylinder 57.

The outer cylinder 56 is fitted into the cylindrical part 59 of the bundle 22,
On the other hand, the inner cylinder 57 is attached to a protrusion 32 provided on the upper cover 24 of the vibration motor 23 by a pin 30 and a snap ring 31 inserted therein.

Therefore, since the buffer body 29 connects the bundle 22 and the vibrating section 55 via the elastic material 60, it buffers the vibrations transmitted from the vibrating section 55 to the bundle 22.

The beater 26 is inserted into the hole inside the protrusion 33 provided at the lower end of the lower cover 27 of the 3° vibration motor 23, as shown in FIG. is combined with

41 Furthermore, a stator 37 is press-fitted into the frame 28 of the vibration motor 23, and a knock pin 36 prevents the stator 37 from moving in the outer circumferential direction due to vibration or the like.

The rotor shaft 25 to which the rotor 38 is fixed is supported at both ends by an upper bearing 43 and a lower bearing 44, which are respectively installed in an upper bearing casing 41 and a lower bearing casing 42.

An upper eccentric weight 39 is attached to the upper end of the rotor shaft 25, and a lower eccentric weight 40 is attached to the lower end of the rotor shaft 25. installed.

The upper eccentric weight 39 and the lower eccentric weight 40 are shown in FIGS. 6 and 7.
As shown in the figure, it is composed of a fixed eccentric weight 45 and a movable eccentric weight 46, and the fixed eccentric weight 45 is fixed to the rotor shaft 25 by a key 49.

The upper protrusion of the movable eccentric weight 46 is divided into a left protrusion 52 and a right protrusion 53 by a slit 50 that reaches the shaft hole 51.
2 is provided with a female thread, and the right protrusion 53 is provided with a bolt hole, so that an adjustment bolt 47 can be screwed in to tighten and fix the movable eccentric weight 46 to the rotor shaft 25 through the slit 50.

Therefore, by loosening the adjustment bolt 47 and shifting the movable eccentric weight 46 by a certain angle about the center of the rotor shaft 25 with respect to the fixed eccentric weight 45, the upper eccentric weight 39 and the lower eccentric weight 40 are adjusted.
The eccentric moment of can be changed arbitrarily.

Although FIG. 3 shows the case where the upper eccentric weight 39 and the lower eccentric weight 40 are of the same size, it is obvious that they may be of different sizes.

Further, the lead wire 48 of the vibration motor 23 passes through a groove 61 provided in the bundle 22, and connects the cable 54 and the switch 62.
connected via.

In the above configuration, the cable 54 is connected to an external power source (
(not shown) and turn on the switch 62, the rotor shaft 25 of the vibration motor 23 rotates, and centrifugal force is generated in the upper eccentric weight 39 and the lower eccentric weight 40 attached to the rotor shaft 25, respectively. , causes the vibrating section 55 to rotate and vibrate.

In this case, if the eccentric moment of the upper eccentric weight 39 is set smaller than the eccentric moment of the lower eccentric weight, the centrifugal force generated in the upper eccentric weight 39 will be smaller than the centrifugal force generated in the lower eccentric weight 40.

Therefore, as shown in FIG.
and the centrifugal force generated in the lower eccentric weight 40 are respectively Fl
, F2, the distance between U and L is Xl, the point of application of the resultant force of the centrifugal forces F1 and F2 is 01, and the center of gravity of the vibrating part 55 of the titanpa 21 is the node of G1 rotational vibration is 0, as mentioned above, the upper The phase of the mounting position of eccentric weight 39 and lower eccentric weight 40 is 180
Since the centrifugal force F1. F2 are parallel forces facing in opposite directions, and if the resultant force is F, it becomes F-F2-Fl, and the distance between the point of force 01 of the resultant force F and L is X
2, the size of Fl and F2, that is, the upper eccentric weight is 39
By arbitrarily setting the eccentric moment of the lower eccentric weight 40 such that F2>Fl, X2 can be arbitrarily changed.

Therefore, since the distance f between 01 and G can be set to any desired value, the value of lo obtained from equation (a) can also be set to any desired size, and the rotational vibration node O is always set to the bundle 22. You can make it come closer.

As a result, almost no vibration can be transmitted to the bundle 22 of the damper 21.

Moreover, FIG. 9 shows another embodiment of the present invention,
A pry limiter 63 made of elastic material on the bundle 22
It has been established.

This is because when a Tyampa is used to compact roadbed gravel under railroad ties on railroad tracks, etc., when a worker pries the bundle 22 vertically and thrusts the beater 16 of the Tyampa into the bottom of the sleepers, the shock absorber 29 This is to protect the product from being subjected to excessive force.

In that case, as mentioned above, almost no vibration is transmitted to the bundle 22, but by prying the bundle 22 in the vertical direction,
This restriction device is designed to prevent vibrations from being transmitted to the bundle 22 through the prying restriction device 63 when the prying restriction device 63 contacts the protrusion 32 of the upper cover 24 of the vibration motor 23 of the vibrating portion 55 of the tie tamper. 63 is made of elastic material.

As mentioned above, when using the titanpa of the present invention,
Since the nodes of rotational vibration can be ensured to be close to the bundle, almost no vibration is generated in the operator's hands, so there is almost no fatigue for the operator due to vibration as in the past. Therefore, the effects such as increased work efficiency are significant.

[Brief explanation of drawings]

Fig. 1 is a sectional view of the main parts of a conventional titanpa, Fig. 2 is an explanatory diagram of the relationship between the rotational vibration nodes of the vibrating body, the center of gravity of the vibrating body, and the point of application of centrifugal force, and Fig. 3 is a diagram of the titanpa of the present invention. A sectional view of a main part of one embodiment, FIG. 4 is a view of the beater part in FIG. 3 in the direction of arrow A,
Fig. 5 is a sectional view taken along line B-B in Fig. 3, Fig. 6 is a front view of the eccentric weight, Fig. 7 is a sectional view taken along C-C in Fig. 6, and Fig. 8 is a centrifugal view of the titanpa shown in Fig. 3. FIG. 9 is a diagram showing the relationship between the point of application of the resultant force, the position of the center of gravity of the vibrating part, and the position of the node of rotational vibration. FIG. 9 is a front view of another embodiment of the present invention. 21... Titamper, 22... Bundle, 23... Vibration motor, 24... Upper cover, 25... Rotor shaft, 26・・・・・・
・Vita, 27...Lower cover, 28...
...Frame, 29...Buffer, 30...
...Pin, 31...Snap ring, 32,3
3... Protrusion, 34... Bolt, 35
...Natsuto, 36...Dowel pin, 3
7...Stator, 38...Rotor, 39
...... Upper eccentric weight, 40... Lower eccentric weight, 41... Upper bearing casing, 42... Lower bearing casing, 43... Upper bearing, 44...
Lower bearing, 45...Fixed eccentric weight, 46...
・・Movable eccentric weight, 47・・Adjustment bolt, 48・
...Exit line, 49...Key, 50...
...Slit, 51...Shaft hole, 52...
...Left side protrusion, 53...Right side protrusion, 54...
... Cable, 55 ... Vibration part, 56 ...
...Outer cylinder, 57...Inner cylinder, 58,60...
... Elastic material, 59 ... Cylindrical part, 61 ...
...Groove, 62...Switch, 63...
- Pry restriction device. 0... Nodal point of rotational vibration, G... Center of gravity,
0,... Point of force of centrifugal force, U... Point of force of centrifugal force generated on the upper eccentric weight, L... Point of force of centrifugal force generated on the lower eccentric weight. Point, lo...0
Distance between 1 and O, f... Distance between 01 and G.

Claims (1)

[Scope of Claims] 1. A bundle and a vibrating unit consisting of a vibrating motor with a beater attached to the lower end are connected via a buffer, and a vibration unit is connected to the rotating shaft of the vibrating motor at a constant interval. Two sets of eccentric loads are installed, consisting of a fixed eccentric weight and a movable eccentric weight that can be fixed to the rotating shaft by shifting an arbitrary angle with respect to the fixed eccentric weight, and the eccentric moment of one eccentric weight is equal to the eccentric moment of the other eccentric weight. A titanpa that is smaller than the eccentric moment of the eccentric loads, and is characterized in that the mounting positions of each eccentric load are shifted in phase by 180°. 2. A bundle and a vibrating unit consisting of a vibrating motor with a beater attached to the lower end are connected via a buffer, and a fixed eccentric weight fixed to the rotary shaft is placed at a constant interval on the rotary shaft of the vibrating motor. and a movable eccentric weight that can be fixed to the rotating shaft at any angle with respect to the fixed eccentric weight, and the eccentric moment of one eccentric weight is greater than the eccentric moment of the other eccentric weight. A tie tamper characterized in that the bundle is small in size, and the phase of the mounting position of each eccentric weight is shifted by 180 degrees, and the bundle is provided with a prying limiting device for restricting prying of the bundle.