RU2397430C1 - Survey control machine optical instrument protective enclosure cover drive - Google Patents

Abstract

FIELD: instrument making.

SUBSTANCE: survey control machine optical instrument protective enclosure cover drive consists of handle, sector, lock, and transitional towing element. Drive is provided with compound lever; handle is installed on one of lever arms and another arm is connected through rod with transitional towing element made in the form of length adjustable draw bar with threaded ends. Another end of draw bar is linked through rod to lever, connected to vertical stock installed in guide and rigidly bound with cover. Sector in the form of curved groove is situated in plate alocated square with axis of handle, which contains installed with a possibility of lengthwise transition spring loaded lock that has two face coupled cylindrical surfaces with different diametres of director circles; besides in end points of curved groove there are location holes with diametre larger than groove width.

EFFECT: drive function reliability and operational properties improvement.

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Description

The invention relates to military equipment and can be used to protect the lens of an optical device from bullets, fragments, other foreign objects, precipitation, high humidity, radioactive dust on geodesic binding machines and other military or specialized equipment.

A known actuator is a protective glass shutter sight ("BMP-1 infantry fighting vehicle. Technical description. Military Publishing House of the USSR Ministry of Defense, Moscow, 1972, p. 98, 143). The drive is used to open and close the shutter of the protective glass of the sight head. The damper is pivotally mounted on the armor protection of the sight head, closes at the moment of launching a guided projectile and opens to view the area and aim. When closing the shutter with the help of a pedal and a cable, a roller is mounted, fixed on the axis of the shutter. The damper closes the protective glass and tightens the spring. To close the protective glass for a long time, there is a protrusion at the bottom of the bracket groove, beyond which the pedal starts after releasing it all the way down. The damper rises under the action of the spring after releasing the pedal.

The disadvantages of the device are:

- the great effort required to close the damper, requiring the use of a foot drive,

- the complexity of the design.

Known drive cover for the sight of a combat vehicle (patent RU N 2308664 C1, publ. 25.10.2007), adopted as a prototype. The drive of the cover of the sight of a combat vehicle provides rotation of the cover around an axis mounted on the armor protection (protective casing) of the sight head. The cover is made of two wings, pivotally mounted on the armor protection of the sight head. The drive consists of a handle located in the pipe with the possibility of its movement along the last and joint rotation and connected with a cable fixed on one of the valves. A sector is made on the pipe interacting with a latch (latch). An intermediate traction element in the form of a cable fixed in the groove of the sector and on another leaf is extended along the annular groove of the sector.

The disadvantages of the prototype are:

- large inertia of the system,

- a long time spent springs in a compressed state, capable of leading to fatigue phenomena in the metal and failure in combat conditions,

- the complexity of the design, affecting reliability when performing combat missions.

The proposed invention solves the problem: improving the reliability of the drive to improve its operational characteristics.

The technical result obtained by the implementation of the invention is to create an easy-to-operate drive cover for the protective cover of the optical device of the topographic reference machine, which provides a circular view when the cover is opened, and the lens of the optical device is airtight from the external environment by optimizing the kinematic scheme and using lever transmission.

The specified technical result is achieved by the fact that in the drive cover of the protective casing of the optical device of the topographic referencing machine, comprising a handle with the possibility of longitudinal movement, a sector, a latch, an intermediate traction element, it is new that the drive is equipped with a lever system, the drive handle is mounted on one of the lever arms , the second shoulder of which is connected through a connecting rod with an intermediate traction element, made in the form of a thrust adjustable in length with a thread at its ends, its other end connected through a connecting rod with a good lever connected to a vertical rod mounted in the guide and rigidly connected to the cover, a sector in the form of a curved groove is made in a plate perpendicular to the axis of the handle, inside of which is mounted a spring-loaded clamp having two cylindrical surfaces with different diameters of the guide at the end (defining) circles conjugated by a chamfer, in the extreme positions of the curved groove, fixing holes are made with a diameter larger than the width of the groove. A chamfer can be made along the edge of the sector groove.

Installing the drive handle on one of the lever arms, the second arm of which is connected via a connecting rod with an intermediate traction element — a rod adjustable in length, connected at the other end through a connecting rod with a similar lever, which transmits movement to a vertical rod mounted in the guide and rigidly connected to the cover, allows :

- convert the curvilinear movement of the handle into a rectilinear translational movement of the vertical rod located in the guide,

- to provide vertical lifting of the cover of the protective casing, allowing the optical device to operate in the maximum angular range without changing the orientation of the chassis on which this equipment is installed,

- expand the possibilities for the location of the optical device in the back of the chassis regardless of the location of the operator’s regular place,

- to ensure high reliability of the drive by eliminating unnecessary gaps in the transmission by adjusting the length of the rod,

- reduce the inertia of the mechanical transmission of the drive.

The execution of the sector in the plate perpendicular to the axis of the handle, inside of which is mounted a spring-loaded retainer having two cylindrical surfaces of various diameters, mated with a chamfer, at the end, in the form of a curved groove, in the extreme positions of which are made fixing holes with a diameter larger than the groove width , allows:

- to ensure reliable fixation of the handle, and therefore the cover in extreme positions (open / close position),

- due to reliable fixation, ensure a tight clip of the cover to the protective casing and protect the lens of the optical device from moisture and radioactive dust,

- to ensure smooth operation of the locking mechanism and ease of operation of the drive as a whole,

- to provide the possibility of creating excessive pressure inside the car chassis.

Performing on the edge of the groove of the chamfer sector allows you to:

- to ensure smooth mating of the groove of the locking sector and surfaces of different diameter of the clamp,

- make the work of the latch smoother.

Technical solutions with features distinguishing the claimed solution from the prototype are not known and do not follow explicitly from the prior art. This suggests that the claimed solution is new and has an inventive step.

The invention is illustrated by drawings, where

figure 1 is a General view of the drive cover protective cover of the optical device of the topographic reference machine,

figure 2 - section aa (longitudinal section of the handle),

figure 3 - diagram of the execution of the chamfer on the edge of the groove with the extended position of the latch.

The drive cover of the protective casing of the optical device of the topographic referencing machine consists of a protective casing 1 located on the chassis of the chassis, having a guide 2 in which the rod 3 is mounted, rigidly fixed to the cover 4 at one end, and through the bracket 5 connected to the two-arm lever 6 with the other, the connecting rod 7 and the intermediate traction element, made in the form of a rod 8 adjustable along the length. The rod 8 is connected to the connecting rod 7 by a thread 9. The rod 8, on the other hand, is connected with a similar thread 9 to a similar connecting rod 7, which is connected to the two-arm lever 10, on which the handle 11 is fixed with the possibility of longitudinal movement. In addition, the rod 8 is fixed on the thread 9 with lock nuts 12. Inside the handle 11 there is a sleeve 13 connected to the latch 14, made in the form of an axis placed on the bracket 15, rigidly mounted on the plate 16. In the cavity formed by the sleeve 13 and the bracket 15, a spring 17 is installed. The plate 16 is rigidly mounted parallel to the lever 10 on the chassis of the car chassis and has a sector in the form of a curved groove 18 bounded by holes 19 with diameters larger than the width of the groove 18. The latch 14 has two cylindrical surfaces 20 and 21 at the end with different diameters of the guide (defining) circle, mating with a chamfer 22. The cover is equipped with a sealing gasket 23. In the embodiment of the drive, a chamfer 24 is made along the edge of the groove of sector 18.

The drive cover of the protective casing of the optical device of the topographic referencing machine works as follows. To close (open, cover 4) it is necessary to move the handle 11 to the upper (lower) position of the latch 14 in the groove 18. At the extreme positions of the handle 11, the cylindrical surface 21 is located in one of the holes 19. When the handle 11 is pressed in the axial direction, the sleeve 13 also begins to move acting on a spring 17, which is limited by a fixed bracket 15. The latch 14, rigidly connected with the sleeve 13, moves, the cylindrical surface 21 comes out of the hole 19. Subsequently, the handle 11 moves along the contour of the groove 18 until of the leading extreme position, the latch 14 in this case interacts with the groove 18 with its cylindrical surface 20 with a smaller diameter of the guide (setting) circle. When moving the handle 10, the lever 9 is turned, which by means of the connecting rod 7 moves the adjustable rod 8. The rod 8 rotates the lever 6, which through the bracket 5 raises (lowers) the rod 3 located in the guide 2. Accordingly, the cover 4 rises (falls), equipped with an additional rod and guide, which are not connected with mechanical transmission ode (not shown). After adjusting the length of the rod 8 and eliminating excessive gaps, the gasket 21 is fully pressed to the protective casing 1.

Performed in the embodiment along the edge of the groove 16, the chamfer 22 gives greater smoothness during operation of the drive.

Thus, in the proposed drive cover of the protective cover of the optical device of the topographic reference machine, an easy-to-use design of the drive of the cover of the protective cover is created, which provides a circular view when the cover is opened, protecting the lens of the optical device from the external environment by optimizing the kinematic scheme and using lever transmission.

Claims (2)

1. The drive cover of the protective casing of the optical device of the topographic reference machine, comprising a handle with the possibility of longitudinal movement, a sector, a latch and an intermediate traction element, characterized in that it is equipped with a lever system, the handle is mounted on one of the lever arms, and the other arm is connected via a connecting rod with intermediate traction element, made in the form of a traction adjustable along the length of the rod with a thread at its ends, the other end of the rod is connected via a connecting rod to a similar lever connected to a vertical rod mounted in the guide and rigidly connected with the lid, a sector in the form of a curved groove is made in a plate located perpendicular to the axis of the handle, inside of which a spring-loaded clamp is installed with the possibility of longitudinal movement, having two cylindrical surfaces at the end, with different diameters of the guide circle, mated with bevels, and in extreme positions curved groove made fixing holes with a diameter greater than the width of the groove. 2. The drive according to claim 1, characterized in that a chamfer is made along the edge of the curved groove.

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