CN103181302B

CN103181302B - Caster locking mechanism

Info

Publication number: CN103181302B
Application number: CN201110444399.9A
Authority: CN
Inventors: 潘盛化; 张君珠
Original assignee: NINGBO JOYO GARDEN TOOLS CO Ltd
Current assignee: NINGBO JOYO GARDEN TOOLS CO Ltd
Priority date: 2011-12-27
Filing date: 2011-12-27
Publication date: 2014-08-13
Anticipated expiration: 2031-12-27
Also published as: CN103181302A

Abstract

The invention relates to a caster locking mechanism, which comprises a shell and a caster component, wherein the caster component consists of a front wheel and a connecting arm; the upper end of the connecting arm is connected to the shell; the lower end of the connecting arm is connected with a wheel shaft of the front wheel; the caster locking mechanism is characterized in that the shell is formed by folding a left shell and a right shell; the left shell and the right shell are provided with through holes; the left side of the upper end of the connecting arm and the left shell are adjustably arranged in a cambered groove, which is formed by folding the left shell and the right shell, through tooth surface matching; the right side of the upper end of the connecting arm is axially connected with a locking block; the locking block is provided with a limiting block which is matched with the connecting arm for locking the movement of the connecting arm along the axial direction; a knob which is matched with the locking block is arranged on the outer side of the right shell; and adjustment and locking of the connecting arm are realized through matching of the knob and the locking block. The caster locking mechanism has the characteristics of simple structure, stable and reliable connection and fastness and convenience in adjustment, quick locking and high adjustment of a caster and a body are realized, and the cutting depth of an edge trimmer can be conveniently adjusted.

Description

A kind of castor locking mechanism

Technical field

The invention belongs to garden instrument technical field, specifically a kind of castor locking mechanism of trimmer.

Background technology

Along with growth in the living standard, the greening level that people live to life requires more and more higher, large-scale ecological greenery patches, city, house greenery patches, Road Green Space etc. constantly increase, therefore various lawns class garden instrument is also constantly released, wherein trimmer is mainly used for the deburring on lawn and lawn sunken cord dissected valley, minute groove etc., general trimmer adopts hand-push type, and can as required, adjust the height of cutting.Traditional trimmer exists that regulating step is numerous and diverse, the defect of length consuming time, requires further improvement.

Summary of the invention

Technical problem to be solved by this invention be to provide a kind of simple in structure, regulate castor locking mechanism fast and easily, realize quick lock in and the adjusting of castor and fuselage.

The present invention solves the problems of the technologies described above adopted technical scheme: a kind of castor locking mechanism, comprise casing and castor assembly, described castor assembly is comprised of front-wheel and linking arm, the upper end of described linking arm is connected on casing, the lower end of linking arm is connected with the wheel shaft of front-wheel, it is characterized in that:

Described casing is to be involuted by left and right casing, and left and right casing is provided with and runs through through hole;

The upper end left side of described linking arm and left shell by flank of tooth engages adjustable be arranged in the deep-slotted chip breaker involuting between left and right casing, the upper end right-hand axis of linking arm is to being connected with a lock dog, lock dog be provided with coordinate with linking arm for locking linking arm mobile limited block vertically, in right shell body outside, be provided with the knob coordinating with lock dog, by realizing knob and coordinating of lock dog the rotation of linking arm, regulate and locking.

As improvement, the upper end of described linking arm is discoid, on its left joint face, along circumference, is all provided with a plurality of tooth pieces, and the inwall of described left shell is provided with the corresponding circular trough with geared surface, and the flank of tooth cooperation that passes on left of described linking arm is connected with left shell.

As improvement, described lock dog is sleeve-like configuration, in the outside of lock dog, be provided with two limited blocks, on described linking arm, be respectively equipped with the confined planes corresponding with limited block, described lock dog is compressed linking arm locking or staggers by limited block and coordinating of confined planes and unlocks, between lock dog and linking arm, be supported with a torsion spring, make lock dog there is all the time the trend with linking arm locking, make linking arm have all the time simultaneously and be close to meshing trend with left shell.

Improve, the inner end of described knob is inserted in lock dog and connects by hexagonal again, and is provided with limit rib on the outer surface of the inner end of described knob, and the inwall of described lock dog is provided with corresponding stopper slot.

Further improve, on the upper end of described linking arm, lock dog and knob, offer corresponding through hole, by a bolt, through through hole, torsion spring, lock dog, right shell body through hole, knob on left shell through hole, linking arm, at the other end, by nut, be connected and fixed.

Finally, the outer surface of described linking arm is provided with for representing the height bar of gear.Described casing adopts the housing of mower, lawn trimmer or trimmer.

Compared with prior art, the invention has the advantages that: castor assembly is connected by the flank of tooth with housing, by lock dog, lock simultaneously, have simple in structure, regulate feature fast and easily, during use, only need push-turn key, the linking arm locking of lock dog and castor assembly is untied, and just can carry out height and regulate, behind location, unclamp knob, lock dog again can auto lock linking arm.That the present invention has is simple in structure, stable connection reliable, regulate feature fast and easily, has realized the quick lock in of castor and fuselage and highly adjusting, can regulate easily the depth of cut of trimmer.

Accompanying drawing explanation

Fig. 1 is STRUCTURE DECOMPOSITION schematic diagram of the present invention;

Fig. 2 is the scheme of installation of lock dog of the present invention and knob;

Fig. 3 a, 3b are the scheme of installations of castor assembly of the present invention and lock dog, knob;

Fig. 4～Fig. 6 is fundamental diagram of the present invention;

Fig. 7 a, 7b, 7c are the end view of the present invention when different adjustment gear.

Embodiment

Below in conjunction with accompanying drawing, embodiment is described in further detail the present invention.

As shown in Figure 1, a kind of castor locking mechanism, comprise casing, castor assembly 1, lock dog 4 and knob 5, described castor assembly 1 is comprised of front-wheel 11 and linking arm 12, the upper end of described linking arm 12 is connected on casing, the lower end of linking arm 12 is connected with the wheel shaft of front-wheel 11, described casing is by a left side, right casing 2, 3 involute, left, right casing 2, 3 are provided with and run through through hole, the upper end of described linking arm 12 and lock dog 4 are arranged on a left side, right casing 2, in 3 deep-slotted chip breakers that involute, the upper end of described linking arm 12 is discoid, its center is provided with and a left side, right casing 2, on 3, run through the through hole that through hole is corresponding, on the left joint face of linking arm 12, along circumference, be all provided with a plurality of tooth pieces 12.1, the inwall of described left shell 2 is provided with the corresponding circular trough 21 with geared surface, the flank of tooth cooperation that passes on left of described linking arm 12 is connected with left shell 2, described lock dog 4 is sleeve-like configuration, in the outside of lock dog 4, be provided with two coordinate with linking arm 12 for locking linking arm 12 mobile circular arc limited block A and rectangular limited block C vertically, on the right joint face of described linking arm 12, be respectively equipped with confined planes B and the D of the circular arc corresponding with limited block A and C, described lock dog 4 is by limited block A and confined planes B, the cooperation of limited block C and confined planes D compresses limitation locking by linking arm 12, between lock dog 4 and linking arm 12, be supported with a torsion spring 6, torsion spring 6 is enclosed within on the adapter sleeve of linking arm 12, make lock dog 4 there is all the time the trend with linking arm 12 lockings, make linking arm 12 have all the time simultaneously and be close to meshing trend with left shell 2, described knob 5 is located at the outside of right shell body 3, the inner end of described knob 5 is inserted in lock dog 4 and connects by hexagonal through the through hole of right shell body 3, be exactly that cross section presents hexagon and is connected, and be provided with limit rib 51 on the outer surface of the inner end of described knob 5, the inwall of described lock dog 4 is provided with corresponding stopper slot 43, can guarantee the uniqueness of rigging position, on described knob 5, be also provided with through hole, by a bolt 7, pass left shell 2 through holes, through hole on linking arm 12, torsion spring 6, lock dog 4, right shell body 3 through holes, the through hole of knob 5, at the other end, by nut, be connected and fixed, so just castor assembly 1 is assemblied on casing, by 4 pairs of linking arms of lock dog 12, carry out limitation locking, by the rotation of knob 5, make the spacing releasing of lock dog 4 and linking arm 12 simultaneously, on the outer surface of the upper end of linking arm 12 disc structure, be provided with for representing the height bar 12.2 of gear, can carry out according to the depth of cut of trimmer the adjusting of height.

Operation principle is such:

In the time of need to regulating, first knob 5 is screwed into the end of to downwards, as Fig. 4, knob 5 drives lock dog 4 to rotate, make lock dog 4 and the limit point of linking arm 12 stagger (be the limited block A of lock dog 4 and C respectively with linking arm 12 on confined planes B and D stagger), make to there is certain interval between the upper end of linking arm 12 and lock dog 4, linking arm 12 is along axially movable spacing releasing like this, now just can promote the elastic force that linking arm 12 overcomes torsion spring 6 to the right by external force regulates, tooth piece 12.1 on the left joint face of linking arm 12 is skidded off and enters next tooth position from the tooth position of left shell 2, after external force is removed, as shown in Figure 5, under the preload pressure of torsion spring 6, make the tooth piece 12.1 on linking arm 12 meshing with left shell 2, unclamp knob 5, as Fig. 6, under the torsional moment effect of torsion spring 6, lock dog 4 drives knob 5 to return to latched position, and lock dog 4 is pushed down linking arm 12, and the limited block A of lock dog 4 and C push down confined planes B and the D on linking arm 12, gapless between lock dog 4 and linking arm 12, thereby restriction linking arm 12 moves axially, the tooth piece 12.1 on linking arm 12 is locked without enough highly skidding off, and is about to castor assembly 1 locking.Can according to the depth of cut of trimmer, carry out the adjusting of height, be provided with the height bar 12.2 of expression gear at the outer surface of linking arm 12, can set three gears, Fig. 7 a, 7b, 7c are respectively the height under different gears.

This castor locking mechanism is adapted at garden instrument as applied on trimmer, mower.

Claims

1. a castor locking mechanism, comprises casing and castor assembly, and described castor assembly is comprised of front-wheel and linking arm, and the upper end of described linking arm is connected on casing, and the lower end of linking arm is connected with the wheel shaft of front-wheel, it is characterized in that:

The upper end left side of described linking arm and left shell by flank of tooth engages adjustable be arranged in the deep-slotted chip breaker involuting between left and right casing; the upper end right-hand axis of linking arm is to being connected with a lock dog; lock dog be provided with coordinate with linking arm for locking linking arm mobile limited block vertically; in right shell body outside, be provided with the knob coordinating with lock dog, by realizing knob and coordinating of lock dog the rotation of linking arm, regulate and locking;

Described lock dog is sleeve-like configuration; in the outside of lock dog, be provided with two limited blocks; on described linking arm, be respectively equipped with the confined planes corresponding with limited block; described lock dog is compressed linking arm locking or staggers by limited block and coordinating of confined planes and unlocks; between lock dog and linking arm, be supported with a torsion spring; make lock dog there is all the time the trend with linking arm locking, make linking arm have all the time simultaneously and be close to meshing trend with left shell;

The inner end of described knob is inserted in lock dog and connects by hexagonal, and is provided with limit rib on the outer surface of the inner end of described knob, and the inwall of described lock dog is provided with corresponding stopper slot.

2. castor locking mechanism according to claim 1, the upper end that it is characterized in that described linking arm is discoid, on its left joint face, along circumference, be provided with a plurality of tooth pieces, the inwall of described left shell is provided with the corresponding circular trough with geared surface, and the flank of tooth cooperation that passes on left of described linking arm is connected with left shell.

3. castor locking mechanism according to claim 1, it is characterized in that offering corresponding through hole on upper end, lock dog and the knob of described linking arm, by a bolt, through through hole, torsion spring, lock dog, right shell body through hole, knob on left shell through hole, linking arm, at the other end, by nut, be connected and fixed.

4. according to the castor locking mechanism described in the arbitrary claim of claims 1 to 3, it is characterized in that the outer surface of described linking arm is provided with for representing the height bar of gear.

5. according to the castor locking mechanism described in the arbitrary claim of claims 1 to 3, it is characterized in that described casing adopts the casing of mower, lawn trimmer or trimmer.