SU798025A1 - Hand winch - Google Patents

Description

(54) HAND Winches

PT5

torque, for example splines, in addition, the inner surface of the axis at the end opposite to the handle is threaded, into which an adjustable stop is screwed, which interacts through a second, a number of pressure elements with a stop disc, made in one piece with the carrier.

The drawing schematically shows a hand winch.

The winch consists of the cable drum 1, the fundamental frame 2 with the hollow axis of the drum 3 rigidly fixed in it, into which the planetary gearbox consisting of the gear ring 4 fixed in the drum 1, the satellite gear 5 installed in the crawler b, and the shaft 5 gear 7, rigidly connected to the drive handle 8, a ratchet mechanism consisting of a pawl 9, a normally pressed spring of a torsion 10 on the ratchet wheel 11, and a normally closed friction clutch consisting of a pressure disk 12 and a friction disk 13 pressed-down zhinoy to the flange 14 of the carrier 6 is yuschemus -upornym clutch disc.

The gear shaft 7 has screw-cutting 15 and thrust collar 16, and a threaded section 17 on the inner surface of the drum axis. In addition, the axis of the drum 3 has a notch to provide gear gear of the shaft gear 7 with satellite gear 5 and two rows of windows located around the circles in which the balls 18 and 19 are placed, providing a kinematic connection between the stop 20 and the carrier b, the stop collar 16 and the pressure disc 12 of the coupling, respectively. In order to ensure the transmission and twisting with torsional moments and the possibility of axial displacements, the connection of the friction disk 13 with the ratchet wheel 11, the pressure disk 12 and drove with the axis of the drum 3 is provided with splines Elm.

The winch works as follows.

The load is lifted by rotating the drive handle 8, and the shaft gear 7 is in engagement with the satellite gear 5, which, in turn, is in constant engagement with the ring gear 4. The pawl 9 is pressed by the torsion spring 10 to the ratchet the wheel .11, rigidly connected to the axle of the barab on 3 by means of a friction clutch, maintains the load and prevents rotation of the drum in the direction of lowering the load. In the event of an increase in the force in the rope to the limit drum 1 together with the ratchet mechanism and the friction disk 13, it will turn towards lowering the load due to the disk 13 slipping. The free rotation of the drum under the action of the load is ensured by axial movement and subsequent rotation of the drive handle 8, and the screw 15 interacts with the threaded section 17, which by means of applying the stop collar 16 through the balls 19 to the pressure disk 12 opens the friction clutch. Under the load, the released drum 1 rotates together with the ratchet mechanism and the friction disk 13.

The brake is braked by rotating the drive handle 8 in the opposite direction, while compressing the spring 14 is reduced and the spring moves the pressure plate 12, preloading the clutch and reducing the pickling speed or stopping the drum. The preloading force of the friction clutch and, accordingly, of the winch overload is controlled by rotating the stop 20 mounted on the thread in the axis of the drum 3, with the balls 18 driving the 6 along the slots moving in the axial direction and increasing or decreasing the compressive force of the spring 14.

The use of a winch of this design allows for the free pickling of the rope under the action of the load, the ability to brake the drum when the load is lowered freely, and the design of the winch to be protected against overloading.

Claims (2)

Invention Formula A hand winch containing a cable drum mounted rotatably on a hollow fixed axis, a ratchet wheel connected to a spring-loaded doggie and a friction disk interacting with a stop and pressure disk operated by means of a screw-cut shaft fixed to it with a handle handle, with In this way, the shaft is connected to the drum, which is integrated in the last planetary gearbox, consisting of a satellite gear installed on the cage, connected with a gear ring, connected to the drum, and and a cut-out for satellite gear, characterized in that. that, in order to reduce labor costs when lowering the load by ensuring free rotation of the drum under the action of the load and protecting the winch against overloads, the pressure plate is equipped with a closing spring, in a fixed axis there are circumferential windows in which pressure elements are located the axis on the handle side is provided with a threaded section, wherein the shaft is adapted to axially move, while interacting with its screw thread with the threaded section of the axis and provided with an anvil collar, interacting with | displacements with the pressure disk through a series of pressure elements, in addition, the carrier and pressure disk are connected to the axis, and the friction disk - with the ratchet wheel - with torque transmission elements, such as splines. 2, Winch pop.1, characterized in that, in order to adjust the overload torque, the inner surface of the axis at the end opposite to the handle is provided with a thread into which an adjustable stop is screwed, which interacts through a second row of pressure elements with a stop disc, made in one piece with the carrier. Information sources, . taken into account during the examination 1. USSR author's certificate 318543, cl. In 66 D 1/04, 1970. 2. USSR author's certificate 497213, cl. In 66 O 1/04, 1974.