CN2140968Y

CN2140968Y - Safety crank for engines

Info

Publication number: CN2140968Y
Application number: CN 92236372
Authority: CN
Inventors: 王连义; 王东悦
Original assignee: PILOT PLANT OF BEIFANG POLYTECHNIC UNIV
Current assignee: PILOT PLANT OF BEIFANG POLYTECHNIC UNIV
Priority date: 1992-10-17
Filing date: 1992-10-17
Publication date: 1993-08-25
Anticipated expiration: 2002-10-17

Abstract

The utility model relates to a safety crank with double-safety for engines used for the hand-operated starting of the engines of the motor vehicles of automobiles, tractors, etc. The utility model is provided with a safety device on the main shaft of an existing crank, and the safety device comprises an anti-reverse device and an automatic disengaging device. When in use, a pawl 16 in a casing 6 is engaged and fixedly connected with a ratchet wheel 5 on the main shaft 3, which has the anti-reverse function, when the engine reverses; simultaneously, the main shaft 3 can act on the bevel of a gear tooth 8 on a wobbler 9 through the bevel of a gear tooth 7 on the casing 6, the pawl 16 and the ratchet wheel 5, forcing the casing 6 to drive the ratchet wheel 5, and thereby, the utility model is driven to disengage from the engine.

Description

Safety crank for engines

The utility model is a kind of motor dual fail-safe safe rocking handle that is used for motor vehicle engine manual crankings such as automobile, tractor.

At present, the rocking handle that is used for motor vehicle engine manual crankings such as automobile, tractor is made of handle, connecting rod, main shaft, straight pin.This rocking handle in use can wound the operator if take a turn for the worse and drive the rocking handle reverse during engine start.

The purpose of this utility model promptly is to overcome the deficiencies in the prior art, designs a kind of safe rocking handle, can guarantee operator's safety, can avoid again playing the dual fail-safe effect, i.e. motor dual fail-safe safe rocking handle because of rocking handle is to overcome to reverse the parts that damage motor.

The utility model is equipped with the safety installations that comprises anti-reversing gearbox and automatic detachment machine structure on the main shaft that has rocking handle now, anti-reversing gearbox covers, reaches ratchet by ratchet, housing, shelves and constitutes; The automatic detachment machine structure is made of housing and wabbler.In use; when motor takes a turn for the worse the reverse of drive main shaft; the ratchet that ratchet interlock in the housing is connected on the main shaft plays the anti-reverse usefulness that transfers to; main shaft passes through the ramp effect of the teeth on ratchet, ratchet, the housing in the inclined-plane of the teeth of wabbler simultaneously; because wabbler can not rotate and can not advance; thereby drive the utility model and motor disengaging thereby force the housing band ratchet, play the dual fail-safe effect of protection operator and motor.

Accompanying drawing is an embodiment of the present utility model, and Fig. 1 is the form structure schematic representation, and Fig. 2 is the safety installations cross-sectional schematic, and Fig. 3 is ratchet and ratchet assembly relation cross-sectional schematic, and Fig. 4 is the elevational schematic view of wabbler.Among the figure, 1 handle, 2 connecting rods, 3 main shafts, 4 straight pins, 5 ratchets, 6 housings, 7 housing teeth, 8 wabbler teeth, 9 wabblers, 10 stage clips, 11 taper pins, 12 doors, 13 fixed blocks, 14 ratchets, 15 pawl slots, 16 ratchets, 17 springs, 18 spindle holes, 19 stationary planes.

Embodiment below in conjunction with accompanying drawing is explained in detail the utility model.In this embodiment, the utility model is made up of rocking handle and safety installations that handle 1, connecting rod 2, main shaft 3, straight pin 4 constitute.

(1). safety installations comprises anti-reversing gearbox and automatic detachment machine structure;

(2). anti-reversing gearbox is made of ratchet 5, housing 6, door 12, ratchet 16, ratchet 5 is connected with main shaft 3, ratchet 16 is housed in the housing 6, and door 12 is connected with housing 6 and seals and put ratchet 5 in the chamber of housing 6, the ratchet 14 on the ratchet 5 and the ratchet 16 counter-clockwise interlocks of housing 6 interior dresses;

(3). the automatic detachment machine structure is made of housing 6 and wabbler 9, be shaped on teeth 7 and 8 on housing 6 and the wabbler 9, each teeth all has an inclined-plane and one to face directly, and the teeth 7 of housing 6 and wabbler 9 and 8 mutual interlocks and inclined-plane are relative, also are shaped on stationary plane 19 and fixed block 13 on the wabbler 9.

When the manual cranking motor car engine, an end that the utility model is equipped with straight pin 4 inserts the startup pawl of motor end by the rocking handle hole on the automobile front beam, make the stationary plane 19 of wabbler 9 withstand on the automobile front beam, the groove fit in rocking handle hole on fixed block 13 and the front bumper, wabbler 9 can not be advanced can not rotate.Clockwise crank handle ato unit, this moment, ratchet 16 was inoperative, and handle is proper functioning successfully.When engine start took a turn for the worse, motor drove main shaft 3 and rotates counterclockwise, and reversed thereby drive ratchet 5, and ratchet 16 reverses with ratchet 14 interlocks prevention the utility model to be guaranteed can not wound the operator; Simultaneously, the power that ratchet 14 acts on ratchet 16 drive housing 6 through the ramp effect of teeth 7 on the inclined-plane of the teeth 8 of wabbler 9, because thereby wabbler 9 can not advance and can not rotate the reaction force that produces on its teeth 8 inclined-planes and force housing 6 being with ratchet 5 being with the disengaging of the utility model and motor, avoid the utility model to damage engine components, play the dual fail-safe effect because of overcoming to reverse.

Ratchet of the present utility model can be connected by taper pin 11 and main shaft 3; Can make pawl slot 15 on housing 6 inwalls, assembling ratchet 16 in the pawl slot 15 is pressed on the ratchet 16 and is put spring 17; Can install a plurality of ratchets in the housing, each ratchet is mounted to respectively and ratchet 14 counter-clockwise interlocks (be that a ratchet and ratchet 14 interlocks are all only arranged in arbitrary moment, thereby limit reverse amount of the present utility model to greatest extent); Door 12 can be connected by screw and housing 6; Wabbler 9 can be pressed and be put stage clip 10; When the utility model after breaking away from motor under the effect that motor reverses, stage clip 10 is interlocked the wabbler 9 and the teeth 7 and 8 of housing 6 again.

The utility model compared with prior art can not only effectively overcome and reverse the personal safety of guaranteeing the operator, and order can be avoided damaging engine components for overcoming to reverse, and has played the effect of dual fail-safe.

Embodiment shown in the drawings has made model machine, and does overtesting on liberation CA10 type truck, and effect is very desirable.

Claims

1, motor dual fail-safe safe rocking handle is made up of rocking handle and safety installations that handle 1, connecting rod 2, main shaft 3, straight pin 4 constitute, it is characterized in that:

2, motor dual fail-safe safe rocking handle as claimed in claim 1 is characterized in that:

(1). ratchet 5 can be connected by taper pin 11 and main shaft 3;

(2). can make pawl slot 15 on housing 6 inwalls, assembling ratchet 16 in the pawl slot 15 is pressed on the ratchet 16 and is put spring 17;

(3). door 12 can be connected by screw and housing 6;

(4). wabbler 9 can be pressed and be put stage clip 10.

3, motor dual fail-safe safe rocking handle as claimed in claim 1 or 2 is characterized in that: can install a plurality of ratchets in the housing, each ratchet is mounted to respectively and ratchet 14 counter-clockwise interlocks.