CN2206740Y - Anti-theft lock for small-sized tractor - Google Patents

Abstract

The utility model relates to an anti-theft lock for a small-sized tractor, which is composed of a lock core, a lock cone, a steel ball, etc., and the anti-theft lock is additionally cast in a slide rod cover and a shaft pressing cover. When the utility model is locked, the lock cone is driven by the lock core to revolve downward, the steel ball can enter a cavity of a slide rod partially, or a cone body directly enters a shaft key groove, a speed changer and a shaft can be further locked, and locking devices of the slide rod and the shaft can be used simultaneously. The utility model has the advantages of economy, practicality, good security, etc.; furthermore, the utility model is an ideal locking device of the small-sized tractor.

Description

Anti-theft lock for small-sized tractor

The utility model belongs to the anti-joyride device of compact tractor.

Along with development of rural economy, many peasants have had trac., have brought many convenience for peasant's farm work and transportation etc.The thing followed is that the stolen thing of trac. often has generation, and trac. is had things stolen does not also have guard measure preferably at present.

The purpose of this utility model provides a kind of anti-joyride device of compact tractor.

The purpose of this utility model is achieved in that a slide bar lid and the axial compression at the change speed gear box of trac. covers, and adds the cavity that can place core of casting, and core cavity top is placed with a common core; On the cavity wall of its underpart negative thread is arranged, in it for having externally threaded lock awl, above-mentioned core bottom with lock bore top by the concave-convex-piece clamping; When with the described core of key turns, core drives the lock awl in cavity bottom helical rotation, and moves by the key turns direction is upper and lower.Above-mentioned blocking device is located at axial compression lid, and the straight-through axle key of core cavity is poor, and when core drive lock awl was rotated down, lock awl bottom entered one keyway, plays locking one effect, otherwise then makes the lock awl upwards, frees locking.When above-mentioned blocking device is located on the slide bar lid, core cavity bottom is between two slide bar cavitys, the core cavity communicates with two slide bar cavitys, this section passage is the ball cavity, when the lock awl moves downward, the ball that above-mentioned cavity can be oppressed in its cone bottom outwards moves, and makes the part of ball enter into two slide bar cavitys, and then plays the purpose of locking slide bar.When lock awl upward movement, ball is freed, and slide bar can free in and out the slide bar cavity, and the lock-out state of slide bar is freed.

Safety performance of the present utility model is good, but pick-proof, anti-pounding, a slide bar blocking device and a shaft lock device can and usefulness, reach the purpose of double insurance.

The drawing explanation:

Fig. 1 is a slide bar lid structural representation.

Fig. 2 is the blocking device scheme drawing of slide bar lid.

Fig. 3 is an axial compression lid structural representation.

Fig. 4 is the blocking device scheme drawing of axial compression lid.

The utility model embodiment sees accompanying drawing, be slide bar lid in left side shown in the figure, add cavity 2 of casting thereon, on cavity 2 tops is a rotating core 1, and negative thread is arranged at the bottom, and is equipped with a screw lock awl 3, core 1 bottom is pegged graft fixing with lock awl 3 tops by concave-convex-piece, when inserting core 1 with key, rotatable core 1 drives lock awl 3 and does rotation.The bottom of above-mentioned cavity 2 communicates between cavity 2 and the cavity 5,6 between two slide bar cavitys 5,6 of slide bar lid, and this section passage is a steel ball cavity 7, there is a pair of steel ball to be placed in one, when lock awl 3 is rotated down, can oppress described steel ball 4 and outwards move, steel ball 4 parts expose to cavity 7; And enter slide bar cavity 5,6.Put when main shift lever to routine gear, when paying change speed gear box to the high speed position, promptly slide bar moves in above-mentioned two cavitys 5,6, and can operate core this moment, the lock awl is rotated down locks, because steel ball 4 outwards moves, will hinder slide bar and shift out slide bar cavity 5,6.Opposite spin core when pressing aforesaid operations just can unlock, and steel ball 4 is released, and slide bar can enter or shift out slide bar cavity 5,6, carries out gear shift work.The blocking device of one axial compression lid is identical substantially with the slide bar blocking device, when just the lock awl is descending, directly enters a shaft key groove 8, and then hinders one rotation, and its power can't be transmitted, otherwise, free one locking.

Claims (2)

1, a kind of compact tractor anti-theft column lock, it is characterized in that: cover to add at slide bar and cast a cavity 2, the top of cavity 2 is placed with core 1, negative thread is arranged at the bottom, and being placed with screw lock awl 3, it is fixing to peg graft by relief members in core 1 bottom and lock awl 3 tops, communicates between cavity 2 and the slide bar cavity 5,6, this section passage is a steel ball cavity 7, places a pair of steel ball 4 in it respectively; During locking, core 1 drives lock awl 3 and is rotated down, and the steel ball 4 in the compressing cavity 7 outwards moves, and its part enters in slide bar cavity 5,6, hinders slide bar and shifts out cavity 5,6; When core 1 drive lock awl 3 rotated up, steel ball 4 was freed in cavity 7, the extensible cavity 5,6 of slide bar.

2, a kind of compact tractor anti-theft column lock is characterized in that: cover to add in an axial compression and cast a cavity 2, the top of cavity 2 is equipped with core 1, and negative thread is arranged at the bottom; And be equipped with a screw fastening awl 3, cavity 2 bottoms communicate with a shaft key groove 8; During locking, core 1 drives lock awl 3 and is rotated down, and enters in the cavity 8, locks one; Otherwise lock awl 3 screws out a shaft key groove 8.

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