JPH069417Y2 - Lever device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a lever device for transmitting a large power such as an opening / closing operation force in a switch.

[Conventional technology]

Conventionally, for example, in a switch, when an opening / closing element is opened / closed by an electromagnetic operation force, a lever device as shown in FIG. 5 is used.

It has one support shaft (2) supported between a pair of support pieces (1).
The pair of opposite levers (3) are rotatably supported, and the power transmission input shaft (4) is mounted between the tips of both levers (3), and the plunger rod (6) of the electromagnetic solenoid (5) is attached to this. And the output shaft (7) for power transmission between the levers (3) and the tip of the lever (3).
It is connected to (9), and by controlling the energization of the electromagnetic solenoid (5), both levers (3) rotate and the movable contact (9) contacts and separates from the fixed contact (10), opening and closing. This is a mechanism for opening and closing the element (8).

In addition, actually, the output shaft (7) and the movable contact (9) are connected via various levers, links and the like.

By the way, the pair of levers (3) are supported by the support shaft (2) via bearings, and as shown in FIG. 6, both levers (3) are attached to both ends of the cylindrical boss (11). The bases of 3) are fitted together and they are integrated by welding, and the boss (1) is attached to the support shaft (2) via a pair of bearings (12).
1) is supported, and both levers (3) are rotatably supported.

An opening prevention member (13) is fixed between the levers (3) by welding to prevent the levers (3) from being opened and deformed outward due to a load force.

In addition, the support shaft (2) has a cylindrical collar (14) that regulates the inner space between both bearings (12) and both bearings (12).
Located on the outside of each of the bearings (12) and lever
An annular retaining plate (15) to prevent the (3) from coming off to the outside.
The bearing (12), the collar (14) and the retaining plate (15) are displaced relative to the support shaft (2) by the C-shaped retaining ring (16) that is loosely inserted into the support shaft (2). Is prevented.

Incidentally, in addition to integrally forming the pair of levers (3) by welding the boss (11) and the member (13), there is also one in which these are integrally formed of ductile cast iron.

[Problems to be solved by the invention]

However, in the conventional lever device, a pair of levers is used.
When the (3) is supported on the support shaft (2) through the bearing (12), the boss (11), the member (13), the collar (14) and the retaining plate
(15) requires a large number of parts, which complicates the structure and deteriorates the assemblability. Moreover, since a pair of levers (3) are integrated by welding or casting, welding distortion and casting The yield is poor due to variations and the like, making it unsuitable for mass production, resulting in an expensive product.

This invention was made with the above points in mind,
It is an object of the present invention to provide a means capable of supporting a pair of levers via bearings on a support shaft with a small number of parts.

[Means for solving problems]

Next, the structure of this invention will be described with reference to FIGS. 1 and 2 corresponding to the embodiment.

In this invention, a pair of opposed levers (3) 'are supported on a support shaft via bearings (12), respectively,
(3) 'A lever device having power transmission shafts (4), (7) mounted between the respective tip portions thereof, which is constructed by bending a single plate into a U-shape, and both side pieces are both levers.
(3) 'and the lever body (17) and the both bearings (12), which are transparently provided at opposite positions of the both levers (3)'.
Round holes (18) in which the outer ring parts of the
(3) 'is formed with a cutout groove (19) formed by cutting out from the peripheral edge of the round hole (18), and both sides are inserted into the cutout grooves (19), respectively, and the bearings (12) The protrusions (23) for regulating the bearing spacing and the levers that are fitted in between
Lever disengagement protrusions (2
4) and a holding plate (22) having (25).

[Action]

Therefore, the pair of opposed levers (3) ', which are both side pieces of the lever body (17), rotate on the support shaft (2) by the bearing (12) having the outer ring portion fitted in the round hole (18). It is supported freely, and at this time, by fitting it between the bearing interval regulating protrusions (23) and the bearings (12) of the holding plate (22),
Both bearings (12) are prevented from moving inwards and the retaining plate (2
2) Lever stopper protrusions (24) and (25) are on both levers.
By engaging with (3) 'respectively, both levers (3)',
That is, the lever body (17) is prevented from coming off the bearing (12).

〔Example〕

Next, the present invention will be described in detail with reference to FIGS. 1 to 4 showing the first embodiment. The same symbols as those used above indicate the same or corresponding ones.

In these drawings, (17) is a lever body formed by bending a single plate into a U shape by press working, and a pair of levers (3) ′ facing each other on both side pieces, and (18) is a lever body. A round hole through which the bases of both levers (3) 'are opposed to each other and through which the outer ring portion of the bearing (12) is fitted and engaged, and (19) is the middle part of each lever (3)'. And the lever (3) ′ from the peripheral wall of the round hole (18).
Notches along the longitudinal direction of (20) and (21)
Is a support hole which is transparently provided so as to face each other at the tip of each lever (3) 'and supports the power transmission input shaft (4) and the output shaft (7).

(22) has both notches (19) on both sides of each lever (3) '
It is a holding plate that is attached to both levers (3) 'and is configured by press punching of a flat plate, and is fitted between both bearings (12) to fit the inside of both bearings (12). Bearing space regulation protrusions (23) to prevent movement
And both levers (3) 'are engaged from the outside to prevent the both levers (3)' from opening outward and the lever body (1
The hook-shaped projection (24) that also functions as a retainer in the thrust direction with respect to the bearing (12) of (7) and the inside of both levers (3) ′ are engaged and engaged to engage both levers (3) ′. Is formed with a protrusion (25) that prevents the lever from deforming inward and prevents the lever (17) from slipping out in the thrust direction with respect to the bearing (12).

In order to support the pair of levers (3) 'on the support shaft (2), first, the holding plate (22) is inserted from the round hole (18) of the pair of levers (3)' into the notch groove (19). ) And insert the holding plate (22) into each side, and then insert the round holes (1) of both levers (3) '.
Fit the outer ring part of the bearing (12) into the outer ring part (8) from the outside, then fit the support shaft (2) into the inner ring part of both bearings (12), and remove the bearings (12) from the support shaft part. Prevent it with the retaining ring (16) fitted in (2).

As a result, both levers (3) 'have bearings (12)
Is rotatably supported by the support shaft (2) via
The protrusions (23) of the holding plate (22) prevent both bearings (12) from moving inward, and the bearing (12) is supported by the retaining ring (16) and the protrusions (23) on the support shaft (2). Since the position is fixed, both levers (3) 'engaged with the protrusions (24) and (25) of the holding plate (22) are securely held by both bearings (12) by the holding plate (22), No omission.

Therefore, in the past, when supporting a pair of levers, many parts such as a boss, an opening prevention member, a collar, and a retaining plate were required, whereas in the embodiment, the holding plate (22) is used.
A pair of levers that are both sides of the lever body (17) using only
(3) 'can be rotatably supported on the support shaft (2) through the bearing (12), and the number of parts is extremely small, and the structure is simple.

Moreover, since both levers (3) 'and the holding plate can be formed by press working, there are few variations in parts, the yield is good, and mass production is possible.

[Effect of device]

As described above, according to the lever device of the present invention, a pair of opposite levers are formed on both side pieces of a U-shaped lever body, and a holding plate mounted between both levers forms a pair of bearing gaps. It is possible to regulate and prevent the lever from coming off from the bearing, the number of parts is very small, the structure is simple and the assemblability is good, and the pair of levers are both side pieces of the lever body. As a result, there is little variation in the parts of both levers, yield is good,
It enables mass production and is cheap.

[Brief description of drawings]

1 to 4 show one embodiment of the lever device of the present invention, FIGS. 1 and 2 are a cutaway plan view and a cutaway front view of essential parts, and FIGS. 3 (a) and 3 (b) are 4 is a plan view of the lever plate, FIG. 4 is a plan view of the holding plate, FIG. 5 is a schematic front view of the opening / closing operation mechanism, and FIG. 6 is a plan view of a conventional lever device. (2) ... Support shaft, (3) '... Lever, (4) ... Input shaft, (7) ... Output shaft, (17) ... Lever body, (18) ... Round hole, (19) ... Notch groove, ( twenty two)
… Holding plate, (23), (24), (25)… Projection.

Claims (1)

[Scope of utility model registration request] 1. A lever device in which a pair of opposed levers are respectively supported on a support shaft via bearings, and a power transmission shaft is attached between the respective tip portions of the both levers. A lever body formed by bending it into a U-shape, both side pieces of which are connected to the both levers; A notch groove formed in each of the levers by cutting out from the peripheral edge of the round hole; and a bearing interval regulating projection part, both side portions of which are respectively inserted into the notch grooves and fitted between the both bearings, A lever device, comprising: a holding plate having protrusions for preventing the levers from coming off and engaging with the both levers.