Manual adjustable tensioning device

Abstract

Disclosed is a manual adjustable tensioning device. Slope guide slots are formed in the periphery of a lead screw nut, and contacts are provided with slopes having the same angles and placed in the guide slots of the lead screw nut; two ends of a lead screw are respectively supported in threaded holes of a shell and an end cover; screws are connected to the lead screw nut via threaded holes, the tail end of each screw is in contact with one end of a lever, the other end of the lever is in contact with the slope of the lead screw nut, a roller is mounted at the tail end of the lever, and an extension spring is mounted at the end of the slope of the lead screw nut.

Claims

1. A manual adjustable tensioning device, comprising a handle, a lead screw, a lead screw nut, contacts, force sensors, screws, levers, rollers, springs, a shell and an end cover, wherein slope guide slots are formed in the periphery of the lead screw nut, and the contacts are provided with slopes having the same angles and placed in the guide slots of the lead screw nut; two ends of the lead screw are respectively supported in threaded holes of the shell and the end cover; the screws are connected to the lead screw nut via threaded holes, the tail end of each screw is in contact with one end of the lever, the other end of the lever is in contact with the slope of the lead screw nut, a roller is mounted at the tail end of the lever, and an extension spring is mounted at the end of the slope of the lead screw nut.

Description

BRIEF DESCRIPTION OF DRAWINGS

(1) FIG. 1 is a mounting schematic diagram of a manual adjustable tensioning device of the disclosure.

(2) FIG. 2 is a top view of the manual adjustable tensioning device of the disclosure.

(3) FIG. 3 is a section view in the B-B direction.

LIST OF REFERENCE SYMBOLS

(4) 1 base, 2 manual adjustable tensioning device 3 hub machining base 4 hub 2-1 handle 2-2 lead screw 2-3 shell 2-4 lead screw nut 2-5 force sensor 2-6 end cover 2-7 spring 2-8 roller 2-9 contact 2-10 screw 2-11 lever

DETAILED DESCRIPTION

(5) Details and working conditions of a device provided by the disclosure will be specified below in combination with the accompanying drawings.

(6) A manual adjustable tensioning device is composed of a handle 2-1, a lead screw 2-2, a lead screw nut 2-4, contacts 2-9, force sensors 2-5, screws 2-10, levers 2-11, rollers 2-8, springs 2-7, a shell 2-3 and an end cover 2-6. Slope guide slots are formed in the periphery of the lead screw nut 2-4, and the contacts 2-9 are provided with slopes having the same angles and placed in the guide slots of the lead screw nut 2-4. When the handle 2-1 is rotated, the lead screw 2-2 rotates, and drives the lead screw nut 2-4 to move linearly. When the lead screw nut 2-4 moves up and down, the contacts 2-9 can be driven to expand and retract via the slopes. Two ends of the lead screw 2-2 are respectively supported in threaded holes of the shell 2-3 and the end cover 2-6; because the threaded connection has self-locking property, when the handle 2-1 is rotated to the required position, the lead screw 2-2 can be self-locked; and at the moment, the position of the lead screw nut 2-4 is not changed, and the contacts 2-9 can keep constant tensioning force all the time.

(7) When the contacts 2-9 are fixed at certain positions, if the tensioning force error, detected by the force sensor, of each contact 2-9 exceeds the allowable range, the screw 2-10 needs to be rotated to finely adjust the tensioning force of each contact 2-9. The screws 2-10 are connected to the lead screw nut 2-4 via threaded holes, the tail end of each screw 2-10 is in contact with one end of the lever 2-11, the other end of the lever 2-11 is in contact with the slope of the lead screw nut 2-4, a roller 2-8 is mounted at the tail end of the lever 2-11 to prevent too large friction, and an extension spring 2-7 is mounted at the end of the slope of the lead screw nut 2-4 to ensure the slope of the lead screw nut 2-4 is in contact with the roller 2-8 all the time. When each screw 2-10 is rotated, the screw 2-10 enables one end of the lever 2-11 to rotate, the other end of the lever 2-11 also rotates a certain angle, and the roller 2-8 pressing the slope of the lead screw nut 2-4 jogs, so that the purpose of finely adjusting the tensioning force of the contact 2-9 is fulfilled.

(8) The device of the disclosure passes through inner holes of a hub machining base 3 and a hub 4, and is fixed on a base 1.