CZ301777B6 - Device for preventing movement of electric apparatus control lever - Google Patents

Abstract

In the present invention, there is disclosed a device for preventing movement of electric apparatus control lever (3), especially a device preventing undesired movement of a traction apparatus control lever (3). The control lever (3) turns a shaft (2) of an electric apparatus relative to a frame (1) in which the shaft (2) is rotatably mounted. The control lever (3) with a cam (31) attached thereto, can be turned about its axis located within a sleeve (21) being fixedly coupled with the shaft (2). A push-button (4, 4'), movably mounted in the sleeve (21) and reaching in slots (12, 12') of a slotted link (11, 11') fixedly coupled with the frame (1), protrudes against the cam (31).

Description

Technical field

The invention provides a device for securing the control lever of an electric device, in particular a traction control device, such as controllers, rheostats and the like, against undesired movement of the control lever. These are devices where the control lever is a pivoted shaft against the frame in which the shaft is rotatably mounted.

BACKGROUND OF THE INVENTION

In traction vehicles, where the devices so operated with a shaft operated by a lever are used, the operator alerting device is separate from the other traction control devices. As a rule, such a device is designed as a button, which the operator switches at regular intervals and thus notifies the alertness. If the operator fails to close the button, the traction vehicle disconnection operation is automatically initiated and the traction vehicle stops.

A solution is known from GB 2 229 795 which has a lever pivotable about its axis. Here, the lever does not rotate spontaneously from the working position. The movement of the lever is defined by a slot which is divided into a driving position and a parking position. To overcome the movement from one position to another, it is necessary to overcome the gap between the teeth limiting the movement of the lever in the slot, which is done just by turning the lever 90 ° by the operator. By turning the lever, the rosette, rotating together with the lever, is allowed to pass through the gap between the teeth. The device is used to control the air brakes and separately to control the parking brake. Reverse movement of the air brake releases, whereupon the lever moves in the part of the slot intended for driving mode. Such a design cannot be applied to the safety function of the electrical apparatus when the operator collapses.

The essence of the solution

Device according to the invention for securing the control lever of an electric device, in particular a traction device, to prevent the control lever from undesirable movement. The control lever is a rotated shaft relative to the frame in which the shaft is rotatably mounted. The control lever on which the cam is mounted is rotatably mounted about its axis in a sleeve fixedly connected to the shaft. Opposite the cam protrudes a button movably mounted in a sleeve extending into the slot of the back plate fixedly connected to the frame. This device combines both control and safety functions. When the operator collapses when the operator contacts the control lever, the control lever rotates about the shaft axis.

As the shaft moves, the cam moves as well, which moves the button, which locks into the slot of the sliding block, thereby blocking the movement of the shaft and there is no undesirable speed increase. Conversely, at the same time as this movement blocking the shaft rotation, the power supply is disconnected or the brake is actuated. However, this is not an object of the present invention and is therefore not shown in the drawings.

Description of the drawings

Fig. 1 shows a general axonometric view of the device according to the invention with the push-button formed by the push pin 50, the side view of the device in the locked position is shown in fig. Fig. 4 is a cross-sectional view of the device according to the invention with the rocker button shown in Fig. 6, a side elevation view of the device in the locked position is shown in Fig. 7; the device in the functional position of the rocker arm relative to the slots of the rocker where the rocker arm

Fig. 8 does not interfere with the cut-out in the gateway, Fig. 9 shows a front view of the gateway designated by the rocker.

DETAILED DESCRIPTION OF THE INVENTION

The device according to the invention is intended to secure the control lever 3 of an electric device, in particular a traction, against undesired movement of the control lever 3, wherein the control lever 3 terminated by the handle 32 rotates the shaft 2 against the frame 1 in which the shaft 2 is rotatably mounted. As a rule, this is a controller shaft 2 which is mounted on the control panel of the traction vehicle. The control lever 3 is rotatably mounted about its axis in a housing 22 extending from the sleeve 21 fixedly connected to the shaft 2. A button 4, Ψ movably mounted in the sleeve 21 and extending into the slot 12, 12 'extends into the slot 12, 12 Γ 1 to 5, the button 4 is designed as a retractable pin terminated by a head 44 slidably mounted in a housing 43 mounted t5 in the frame 1, where the movement of the cam 31 pushes the button 4 out of overcoming the spring resistance

42. Turning the handle 32 rotates the control lever 3 and the cam 3 fixed to the control lever 3 at the same time. This causes the head 44 to be pulled out of the slot 12 of the slider 1, thereby allowing the shaft 2 to rotate. By turning the control lever 3 again, the head 41 is locked in the slot 12 and the shaft 2 is locked. In Figures 6 to 9, the button 6 is designed as a rocker arm, where the movement of the cam 31 tilts the rocker arm while simultaneously overloading the torsion spring (not shown for simplicity). By rotating the handle 32, the control lever 3 and the cam 31 fixed behind the control lever 3 are simultaneously rotated. This causes the rocker arm to tilt by turning the control lever T to lock the rocker arm in the cutout 12 ', the movement of the shaft 2 is locked.

By turning the handle 32, the control lever 3 is rotated with the cam 3. The cam 31 actuates the pushbutton 4, T. The shaft 2 can be swiveled with the control lever 3 as required to control the speed of the traction vehicle. If the operator contacts the handle 32, either conscious or human failure, the handle 32 and hence the lever 3 will be returned to the starting position by the action of 42 by simultaneously locking the head 41 into the slot 12. shaft 2 is disabled. If the pushbutton Ψ is formed by a rocker arm, its outer arm is locked into the slot 12 ', which also prevents movement of the lever 3 and hence the rotation of the shaft 2. Simultaneously with this movement blocking the rotation of the shaft 2, the power supply is disconnected or the brake is actuated. However, this is not an object of the present invention and is therefore not shown or described in the drawings.

Claims (1)

40 PATENT CLAIMS Apparatus for securing an operating lever (3) of an electric device, in particular a traction device, against undesired movement of the operating lever (3), wherein the operating lever (3) rotates the shaft (2) relative to the frame (1), 45 in which the shaft (2) is mounted rotatably, characterized in that the control lever (3) on which the cam (31) is mounted is rotatably mounted about its axis in a sleeve (21) fixedly connected to the shaft (2) wherein a button (4, 4 ') protruding movably in the sleeve (21) extending against the cam (31) extends into the slots (12, 12') of the link (11, 11 ') firmly connected to the frame (1).