CN201187997Y

CN201187997Y - Mechanism for spacing mechanical circumversion of turntable

Info

Publication number: CN201187997Y
Application number: CNU200820071690XU
Authority: CN
Inventors: 韩光宇; 高云国
Original assignee: Changchun Institute of Optics Fine Mechanics and Physics of CAS
Current assignee: Changchun Institute of Optics Fine Mechanics and Physics of CAS
Priority date: 2008-04-14
Filing date: 2008-04-14
Publication date: 2009-01-28
Anticipated expiration: 2018-04-14

Abstract

The utility model relates to a mechanical rotation limit mechanism of a turntable, which comprises a collision block fixed on the edge of the turntable, a fixed seat on a base, and a turn block; the turn block includes a first shift fork, a second shift fork and a stop fork; The stop fork, the first shift fork, and the second shift fork form a "Y" shape, and the round hole at the junction of the block fork, the first shift fork and the second shift fork moves with the rotating shaft on the fixed seat; when the turntable is at the initial position , the first edge of the fork is in contact with the protrusion on the fixed seat; when the turntable turns to the limit position, the second edge of the fork is in contact with the protrusion on the fixed seat. Since the turntable turns from the initial position to the limit position, the rotation angle of the stop fork is small, so the impact force generated between the bumper and the first shift fork and the second shift fork, and between the stop fork and the polygonal protrusion is small, The service life of the mechanism is improved.

Description

Turntable machinery rotation position-limit mechanism

Technical field

The utility model relates to a kind of gyration equipment limit mechanism, particularly a kind of gyration equipment turntable machinery rotation position-limit mechanism.

Background technology

In gyration equipment such as transit, gyroscope,, usually pivoting part is carried out the spacing and mechanical position limitation of electricity simultaneously for requirement to equipment protection and equipment precision.

At present, the mechanism that in gyration such as transit, the gyroscope equipment turntable is carried out mechanical position limitation mainly is made of holder on the collision block that is fixed on the turntable edge, the pedestal and switch block.Described switch block comprises first shift fork and second shift fork, and two shift forks form " V " shape; First shift fork and second shift fork joint processing circular hole, the rotating shaft of installing on this circular hole and the holder movingly, switch block can be around this rotating shaft rotation.Turntable is when reference position and spacing position, and first shift fork and second shift fork contact with projection on the holder respectively.Described projection is " V " shape projection; Turntable is when reference position, and the collision block on it contacts with the outward flange of first shift fork; This moment, first shift fork was in a high position, and second shift fork is in low level, and the lower limb of second shift fork contacts with " V " shape projection on the holder.Turntable clockwise rotates, and when collision block is run into first shift fork, stirs switch block, and switch block is rotated around the axis, and first shift fork turns to low level, and second shift fork is in a high position, and the lower limb of first shift fork contacts with " V " shape projection on the holder; Turntable is rotated further, and stops operating when collision block is run into the outward flange of second shift fork.Turntable rotates counterclockwise, and when collision block is run into second shift fork, stirs switch block, and switch block is rotated around the axis, and second shift fork turns to low level, and first shift fork is in a high position, and the lower limb of second shift fork contacts with " V " shape projection on the holder; Turntable is rotated further, and stops operating when collision block is run into the outward flange of first shift fork.The shortcoming of this position-limit mechanism is to have the dead band, can not realize 720 ° spacing; If to realize 720 ° spacing, just need reduce the angle between first shift fork and second shift fork, bring first shift fork and the second shift fork shear strength little so again, anti-impact force is poor, the problem of lacking serviceable life.

Summary of the invention

The technical problems to be solved in the utility model provides a kind of 0 ° of-720 ° of scope of gyration parts that can realize in the gyration equipment and rotates, and strong shock resistance, the turntable machinery rotation position-limit mechanism of long service life.

Turntable machinery rotation position-limit mechanism of the present utility model comprises the collision block that is fixed on the turntable edge, the holder on the pedestal, switch block; Described switch block comprises first shift fork and second shift fork, it is characterized in that described switch block also comprises the retaining fork; The retaining fork and first shift fork, second shift fork form " Y " shape, and the circular hole of retaining fork, first shift fork and the second shift fork junction and the rotating shaft on the holder are movingly; Turntable is when reference position, and first edge of retaining fork contacts with the projection on the holder; When turntable forwarded spacing position to, second edge of retaining fork contacted with the projection on the holder.

Turntable is when reference position, and the collision block on it contacts with the outward flange of first shift fork; This moment, first shift fork was in a high position, and second shift fork is in low level, and first edge of retaining fork contacts with the projection on the holder.Turntable clockwise rotates, and when collision block is run into first shift fork, stirs switch block, and switch block is rotated around the axis, and first shift fork turns to low level, and second shift fork is in a high position, and second edge of retaining fork contacts with the projection of holder; Turntable is rotated further, and stops operating when collision block is run into the outward flange of second shift fork.Turntable rotates counterclockwise, and when collision block is run into second shift fork, stirs switch block, and switch block is rotated around the axis, and second shift fork turns to low level, and first shift fork is in a high position, and first edge of retaining fork contacts with the projection on the holder; Turntable is rotated further, and stops operating when collision block is run into the outward flange of first shift fork.Because turntable forwards spacing position to from reference position, the angle that the retaining fork rotates is less, thus between collision block and first shift fork and second shift fork, retaining is pitched and the polygon projection between the impulsive force that produces little, improved serviceable life of mechanism.

To be that polygon is protruding lack projection on the described holder, during the retaining fork of switch block stretches into that this polygon is protruding and lacks; When turntable was in reference position and spacing position, first edge of retaining fork and second edge contacted with right two inside surfaces of the protruding phase shortage of polygon respectively.

Pad is pasted at first edge and second edge of described retaining fork, the protruding impact between scarce of retaining fork and polygon when turning to reference position and spacing position to reduce turntable.

Described rotating shaft has a shoulder; The central circular hole of fixing pressing plate is enclosed within rotating shaft shoulder place on the holder, in switch block is limited to that polygon is protruding and lacks.

Description of drawings

Fig. 1 is the utility model front view.4 switch blocks among the figure, 5 first shift forks, 6 second shift forks, 7 retaining forks, first edge of 8 retaining forks, second edge of 9 retaining forks, 10 projectioies, first inside surface of 11 projectioies, second inside surface of 12 projectioies.

Fig. 2 is that the A-A of Fig. 1 is to cut-open view.1 collision block among the figure, 2 pressing plates, 3 rotating shafts, 13 holders.

Embodiment

As shown in Figure 1, 2, turntable machinery rotation position-limit mechanism of the present utility model comprises the collision block 1 that is fixed on the turntable edge, the holder 13 on the pedestal, switch block 4; Described switch block 4 comprises first shift fork 5, second shift fork 6 and retaining fork 7, and retaining fork 7 and first shift fork 5, second shift fork 6 form " Y " shape.To be that polygon is protruding lack projection 10 on the described holder 13, during retaining fork 7 stretches into that this polygon is protruding and lacks.Rotating shaft 3 is installed on the holder 13, and rotating shaft 3 has a shoulder; First shift fork 5, second shift fork 6 are pitched 7 junction processing through hole with retaining, and this through hole and rotating shaft 3 are movingly; Pressing plate 2 adopts screw retention on holder 13, and the circle hole sleeve of pressing plate 2 central authorities is at the shoulder place of rotating shaft 3, in switch block 4 is limited to that polygon is protruding and lacks.

First inside surface 11 of projection 10 is relative with second inside surface, 12 positions of projection 10.Turntable is when reference position, and first inside surface 11 of the projection 10 on first edge 8 of retaining fork and the holder 13 contacts; When turntable forwarded spacing position to, second inside surface 12 of the projection 10 on second edge 9 of retaining fork and the holder 13 contacted.

Pad is pasted at first edge 8 and second edge of described retaining fork, the protruding impact between scarce of retaining fork 7 and polygon when turning to reference position and spacing position to reduce turntable.

Claims

1. A mechanical rotation limit mechanism for a turntable, including a bumper fixed on the edge of the turntable, a fixed seat on the base, and a turntable; the turntable includes a first shift fork and a second shift fork, and is characterized in that the The above-mentioned turning block (4) also includes a retaining fork (7); the retaining fork (7) forms a "Y" shape with the first shifting fork (5) and the second shifting fork (6), and the retaining fork (7), the first shifting fork The round hole at the junction of the shift fork (5) and the second shift fork (6) is in motion with the rotating shaft (3) on the fixed seat (13); The protrusion (10) on the fixed seat (13) contacts; when the turntable turns to the limit position, the second edge (9) of the retaining fork contacts with the protrusion (10) on the fixed seat (13).

2. The mechanical rotation limit mechanism of the turntable according to claim 1, characterized in that the protrusion (10) on the fixed seat (13) is a polygonal protrusion, and the stop fork (7) of the turn block (4) Extending into the polygonal notch; when the turntable is at the initial position and the limit position, the first edge (8) and the second edge (9) of the fork are respectively in contact with the two inner surfaces opposite to the polygonal notch.

3. The mechanical rotation limit mechanism of the turntable according to claim 1, characterized in that the first edge (8) and the second edge (9) of the stop fork are pasted with gaskets.

4. The turntable mechanical rotation limit mechanism according to claim 1, characterized in that the rotating shaft (3) has a shoulder; the central round hole of the pressure plate (2) fixed on the fixed seat (13) is sleeved on the rotating shaft ( 3) At the shoulder.