JPH044937Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a point machine having an oil-injected friction clutch mechanism interposed in a power transmission system.

Conventionally, in a switch machine in which a friction clutch mechanism filled with grease is interposed in a power transmission system, power is transmitted from a ring-shaped gear 52 to a rotating case 51, as shown in FIG. 1, for example. ,
The grease is then transmitted to the rotating shaft 21 via the clutch mechanism 20, and then to the rear operating mechanism via the pinion 22. Since the viscosity of the grease changes depending on temperature changes, etc. In order to adjust the friction torque of the clutch mechanism 20 accordingly, the lock pin 55 connecting the ring gear 52 and the adjustment cap 53 screwed onto the gear is released by an adjustment rod, and the adjustment preventing rotation of the cap 53 by a rod;
By connecting a manual handle to the engaging portion 21a of the rotating shaft 21 and rotating the handle left and right, the rotation of the rotating shaft 21 is transmitted to the ring gear 52 via the clutch mechanism 20, and the rotation of the rotating shaft 21 is transmitted to the ring gear 52.
Some clutch mechanisms allow the friction torque to be adjusted by moving the clutch mechanism 20 up and down and adjusting the biasing force of the spring 20b applied to the clutch mechanism 20.

As a conventional example that eliminates the need to adjust friction torque according to temperature changes, for example, the friction clutch mechanism uses oil instead of grease, and the sealed case that houses the clutch mechanism is replaced with a cup-shaped rotating case. , a ring-shaped gear fixed to the upper surface of the case, and an adjustment cap that is screwed onto the gear and has an engagement surface that engages with the rotating case.

However, even in the case of the latter type of point machine, adjustment of the friction torque may be required, and for this reason, if a structure similar to the former type is used, it is necessary to adjust the friction torque. The sliding resistance of the O-ring for preventing oil leakage may be greater than the friction torque, and even if the rotating shaft is rotated by the manual handle for the adjustment, the clutch mechanism will slip and the rotation will be delayed. The rotation of the shaft is not transmitted to the rotating case, making it very difficult to adjust the friction torque, and for clutch mechanisms that have been used for a long time, where adjustment of the friction torque is especially necessary, it is almost impossible to adjust the friction torque. There was a problem.

The present invention was developed in view of these conventional problems, and aims to solve the above problems by adjusting the friction torque without using the friction clutch mechanism.

In order to achieve this object, the present invention provides a switch machine in which an oil-injected friction clutch mechanism 20 is interposed in a power transmission system, and a sealed case 5 that houses the clutch mechanism 20.
A cup-shaped rotating case 51 pivotally supported on the switch main body 1, a ring-shaped gear 52 fixed to the outer periphery of the upper surface of the rotating case 51 and connected to an electric motor, and a center hole of the ring-shaped gear 52. A rotating shaft 21 is provided which passes through the adjusting cap 53 to transmit power rearward and is engaged with the manual handle 6. A clutch mechanism 20 consisting of a plurality of friction plates 20a is interposed between the shaft 21 and the rotating case 51 and is soaked in oil.
A pressing spring 20b is stretched between the ring gear 52 and the adjustment cap 53, a lock pin 55 is provided between the ring gear 52 and the adjustment cap 53, and the lock pin 55 normally connects the two. An adjustment rod insertion opening 53c is provided in the adjustment cap 53 to release the connection by the lock pin 55 when adjusting the friction torque of the adjustment cap 53 and to prevent rotation of the adjustment cap 53, and to connect the manual handle 6 and the ring. shaped gear 52
and an engaging portion 52 which is arranged so as to be connected by a connecting member 9 during the adjustment, and which locks one end of the connecting member 9.
b is provided on the ring-shaped gear 52. With this configuration, the friction torque can be adjusted by transmitting the rotation of the manual handle to the ring-shaped gear via the connecting member.

Hereinafter, one embodiment of the present invention will be described based on the drawings. Note that the same parts as in the conventional example are given the same reference numerals.

FIGS. 2 to 4 show an embodiment of the present invention, in which the rotation of an electric motor M attached to the main body of the switch is pivotally supported by the main body 1 via a power transmission system 2. It is transmitted to the main gear 3 for conversion.

When the main gear 3 rotates clockwise from the state shown in FIG. 2, the roller 31 fixed to the main gear 3 pushes the engaging portion 41a of the cam plate 41 fixed to the operating link 4 upward. Therefore, the operating pin 4 is displaced upward (towards position A), converting the tongue rail (not shown) to the normal position side, and at the same time, the main gear 3
When it rotates counterclockwise from the state shown in FIG. 2, the roller 31 pushes the engaging portion 41a downward, so the operating pin 4 moves downward (towards position B).
The main gear 3 and the operating pin 4 are disposed so as to be displaced and convert the tongue rail to the opposite side.

A locking pin 42 is connected to the tongue rail, and the locking pin 42 is displaced to the A position side and the B position side in conjunction with the displacement of the tongue rail to the normal position and to the opposite side. It is supported by the point machine main body 1.

Cam groove 32 formed in the conversion main gear 3
is engaged with a pin 43a provided on a lock bar 43, and when the main gear 3 rotates clockwise from the state shown in FIG. 2, the lock bar 43 is displaced to the right, and A By meshing with the locking pin 42 that had been displaced to the position side, the tongue rail is locked on the positioning side, and the main gear 3 is moved to the second position.
When the locking bar 43 is rotated counterclockwise from the state shown in the figure, the locking bar 43 is displaced to the left and engages with the locking pin 42 that had been displaced toward position B, thereby moving the tongue rail to the opposite side. The converting main gear 3 and a locking bar 43 are arranged so as to be locked together.

An oil-injected friction clutch mechanism 20 is interposed in the power transmission system 2 while being immersed in oil, and a sealed case 5 housing the clutch mechanism 20 is pivotally supported by the switch main body 1. a cup-shaped rotating case 51; a ring-shaped gear 5 fixed to the upper surface outer periphery 51a of the cup-shaped rotating case 51 with a countersunk screw 50 and connected to the electric motor M;
2, and an adjustment cap 53 having a threaded portion 53a on its outer periphery that is screwed into a threaded portion 52a formed on the inner periphery of the ring-shaped gear 52. An O-ring 54 is interposed between the engagement surface 51b of the rotary case 51 and the engagement surface 53b of the adjustment cap 53 in order to prevent the oil a injected into the sealing case 5 from leaking. There is. Oil supply holes 53c, 53c for injecting oil A are formed in the adjustment cap 53, and the respective oil supply holes 53c, 53c are connected to plugs 53d, 53.
It is plugged by d.

A rotary shaft 21 is inserted through the cap 53, and the rotary shaft 21 has a square hole 21a into which the engaging portion 61 of the handwheel 6 can be engaged, and an air vent hole 21b. The upper opening 21c of the air vent hole 21b is plugged with a plug 21d.

A pinion 22 is fixed to the rotating shaft 21, and the pinion 22 is connected to the main gear 3 via a large gear 23 and a small gear 24. The power transmission system 2 includes a ring gear 52, a cup-shaped rotating case 51, a clutch mechanism 20, and a rotating shaft 2.
1, a pinion 22, a large gear 23, and a small gear 24.

The clutch mechanism 20 consisting of a large number of friction plates 20a is interposed between the rotation shaft 21 and the rotation case 51, and a pressing mechanism is provided between the adjustment cap 53 and the friction plates 20a. A spring 20b is tensioned, and the clutch mechanism 2
0 transmits power between the rotating shaft 21 and the rotating case 51 that is less than the friction torque of the friction plate 20a.

Further, a lock pin 55 is disposed between the ring gear 52 and the adjustment cap 53 to connect the two, and the lock pin 55 is biased in the connection direction by a spring member 55a to lock At this time, the cap 53 is engaged with the notch.

As shown in FIGS. 2 and 3, a hand safety device 7 is disposed on a support frame 11 fixed to the switch body, and a square hole 21 of the rotating shaft 21 is provided with a hand safety device 7.
When the engaging portion 61 of the handwheel 6 is engaged with the handle 6, the safety device 7 is displaced leftward from the state shown in FIG. It is configured to turn off the switch 12.

The adjustment cap 53 has an insertion opening 53e for the adjustment section 8 used during adjustment, which is inserted into the lock pin 5.
5 and above the support frame 1.
1 is also formed with a through hole 11a for the adjustment rod 8.

Further, the ring-shaped gear 52 is formed with an engaging portion 52b that is used during adjustment and that engages with one end 91 of the connecting member 9 that connects the ring-shaped gear 52 and the handwheel 6.

With this configuration, the rotation of the electric motor M is controlled by the ring-shaped gear 52 and the cup-shaped rotating case 5.
1. Friction clutch mechanism 20, rotating shaft 2
1, pinion 22, large gear 23 and small gear 24
The power is transmitted to the conversion main gear 3 via a power transmission system 2 consisting of:

When a current with a localization polarity is applied to the electric motor M, the conversion main gear 3 rotates clockwise from the state shown in FIG. The tongue rail is locked to the stereotaxic side by the engagement of the locking pin 42 and the locking bar 43.

When a current of opposite polarity is applied to the electric motor M, the main gear 3 rotates counterclockwise from the state shown in FIG. 2, displacing the tongue rail in the opposite direction via the operating pin 4, and Said lock pin 42
The tongue rail is locked in the opposite locking position by engagement with the locking bar 43.

When adjusting the friction torque of the clutch mechanism 20, the tip 81 of the adjustment rod 8 is inserted into the insertion opening 53c of the adjustment cap 53, and the lock pin 55 connects the ring gear 52 with the adjustment cap 53. At the same time, the rotation of the adjustment cap 53 is stopped by passing the adjustment rod 8 through the through hole 11a.

Then, one end 91 of the connecting member 9 is inserted into the engagement hole 52b of the ring-shaped gear 52, and the engagement portion 61 of the manual handle 6 is inserted into the square hole 21 of the rotating shaft 21.
engage a. At this time, the safety device 7 turns off the power switch 12 via the transmission member 71.

In the state shown in FIG.
When rotated to the right or left, the connecting member 9
As a result, the ring gear 52 rotates to the right or left, and the adjustment cap 53, which is threaded with the ring gear 52, is displaced upward or downward.
The urging force of the spring 20b applied to the friction plate 20a is adjusted, and the friction torque of the clutch mechanism 20 is adjusted.

In the above embodiment, the engagement portion 52b of the ring-shaped gear 52 is formed by an engagement hole, but an engagement protrusion is formed on the ring-shaped gear 52 as the engagement portion 52b. It may be configured such that one end of the connecting member 9 is connected to the mating protrusion.

According to the switch machine of the present invention, when adjusting the friction torque of the clutch mechanism, the rotation of the manual handle is directly transmitted to the ring-shaped gear via the connecting member without going through the clutch mechanism. In any case, the friction torque of the clutch mechanism can be adjusted reliably and extremely easily.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing a conventional example, Figs. 2 to 4 show an embodiment of the present invention, Fig. 2 is a plan view, Fig. 3 is a sectional view of the main part, Figure 4 is a perspective view of the main parts. 1... Point machine body, 2... Power transmission system, 5...
... Sealed case, 6... Manual handle, 8... Adjustment rod, 9... Connecting member, M... Electric motor, 20...
Oil-injected friction clutch mechanism, 20a
... Friction plate, 20b ... Spring, 21 ... Rotating shaft,
51...Cup-shaped rotating case, 52...Ring-shaped gear, 52...Engaging portion, 53...Adjustment cap, 53c...Insertion port, 55...Lock pin.

Claims (1)

[Claims for Utility Model Registration] In a switch machine in which an oil-injected friction clutch mechanism is interposed in the power transmission system, a sealed case housing the clutch mechanism is pivotally supported on the switch body. A cup-shaped rotating case,
It is formed by a ring-shaped gear fixed to the outer periphery of the upper surface of the rotating case and connected to the electric motor, and an adjustment cap screwed into the threaded part of the center hole of the ring-shaped gear, and the adjustment cap is inserted through the adjustment cap. A rotating shaft that transmits power rearward and is engaged with a manual handle is provided, a clutch mechanism consisting of a plurality of friction plates is interposed between the rotating shaft and the rotating case, and the clutch mechanism is immersed in oil. A pressing spring is stretched between the ring gear and the adjustment cap, and a lock pin is provided between the ring gear and the adjustment cap to normally connect the two, and the lock pin is used when adjusting the friction torque of the friction plate. At the same time, opening an insertion port for an adjustment rod in the adjustment cap to prevent rotation of the adjustment cap, and connecting the manual handle and the ring-shaped gear with a connecting member during the adjustment. A point machine characterized in that the ring-shaped gear is provided with an engaging portion for locking one end of the connecting member.