CN214870226U

CN214870226U - Pulling device for single switch button of helicopter LACU

Info

Publication number: CN214870226U
Application number: CN202022938133.7U
Authority: CN
Inventors: 唐德军; 刘金涛; 博逢卯; 梁虹; 王力功; 王维永; 李世民; 郭飞峰
Original assignee: Chinese People's Liberation Army Aviation College
Current assignee: Chinese People's Liberation Army Aviation College
Priority date: 2020-12-10
Filing date: 2020-12-10
Publication date: 2021-11-26
Anticipated expiration: 2030-12-10

Abstract

The utility model provides a helicopter LACU monomer shift knob's puller, the puller includes: the clamping device comprises two identical clamping jaws, a tetragonal bracket, a tetragonal sliding sleeve and a stressing rod; the tetragonal sliding sleeve is sleeved outside the tetragonal bracket and can slide on the tetragonal bracket under the action of external force; the two clamping jaws are vertically arranged in the tetragonal body bracket; through holes are symmetrically formed below two opposite side plates of the tetragonal body bracket and are used for a force application rod to pass through; rectangular holes are formed above the four plates of the tetragonal bracket; the clamping jaw consists of a rectangular bottom plate and two elastic steel sheets vertically arranged at two ends of the bottom plate; folding bulges are arranged in the middle of each elastic steel sheet, when the square sliding sleeve slides to a certain position relative to the square support, the square sliding sleeve extrudes the folding bulges of the clamping jaws, so that the ends of the two clamping jaws are inwards contracted, and the LACU single switch button head is clamped.

Description

Pulling device for single switch button of helicopter LACU

Technical Field

The utility model relates to a assembly and disassembly tools field, concretely relates to helicopter LACU monomer shift knob's puller.

Background

In the process of maintaining the LACU single switch button of the HC120 helicopter, some problems are caused by improper use of tools, and the problems are mainly as follows: firstly, the circuit has poor contact and loose combination parts; secondly, deformation and damage of the LACU button head, the LACU switch base body and the contact pin; and the disassembly time is long, and the working efficiency is low.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to HC-120 helicopter LACU monomer shift knob dismouting problem, because there is not specialized tool when solving the dismouting, the surperficial fish tail that causes, the parts damage, the low scheduling problem of work efficiency, according to the special assembly and disassembly tools of part annex that factor design such as part appearance, structural feature, material characteristic, dismouting requirement, workspace accord with the dismouting key element, provided a safe, reliable, convenient and efficient LACU monomer shift knob's special assembly and disassembly tools, improve and equip maintenance operating mass with efficiency.

In order to achieve the above object, the utility model provides a helicopter LACU monomer shift knob's puller, the puller includes: the clamping device comprises two identical clamping jaws, a tetragonal bracket, a tetragonal sliding sleeve and a stressing rod; the tetragonal sliding sleeve is sleeved outside the tetragonal bracket and can slide on the tetragonal bracket under the action of external force; the two clamping jaws are vertically arranged in the tetragonal body bracket; through holes are symmetrically formed below two opposite side plates of the tetragonal body bracket and are used for a force application rod to pass through; rectangular holes are formed above the four plates of the tetragonal bracket; the clamping jaw consists of a rectangular bottom plate and two elastic steel sheets vertically arranged at two ends of the bottom plate; folding bulges are arranged in the middle of each elastic steel sheet, when the square sliding sleeve slides to a certain position relative to the square support, the square sliding sleeve extrudes the folding bulges of the clamping jaws, so that the ends of the two clamping jaws are inwards contracted, and the LACU single switch button head is clamped.

As an improvement of the device, the top end of the inner side of the elastic steel sheet is provided with concave-convex stripes for increasing friction force.

As a modification of the above device, the outer angle of the folding projection is 30 °.

As an improvement of the device, the clamping jaws are made of spring steel materials.

As an improvement of the device, the square support and the square sliding sleeve are made of aluminum alloy.

As an improvement of the device, the main body of the square bracket is a cuboid without covers at the upper part and the lower part, the front plate and the rear plate of the square bracket are rectangles with the same size, the size and the shape of the two side plates are the same, and one side plate comprises a rectangular plate and a semicircular plate below the rectangular plate; the rectangular plate has the same length as the front plate.

As an improvement of the device, the through hole is arranged at the position of the bottom of the rectangular plate close to the semicircular plate.

As an improvement of the device, the length of the rectangular hole is slightly larger than the width of the folding protrusions, and the four folding protrusions can be embedded into the four rectangular holes.

The utility model has the advantages that:

the utility model discloses a small and exquisite flexibility of LACU monomer shift knob's puller structure adopts the four sides centre gripping to draw the mode, considers in the design to increase area of contact, has strengthened frictional force, and is big to the area of stress of department's annex, and the parcel nature is good, dismantlement convenient and practical, and the security is strong, and the time of about 6 minutes can be saved at every turn to the dismouting time, has improved work efficiency.

Drawings

FIG. 1 is a schematic diagram of a drawer for a single switch button of a helicopter LACU according to the present invention;

FIG. 2 is a structural diagram of the clamping jaw of the present invention;

FIG. 3 is a schematic view of a rectangular parallelepiped sliding sleeve of the present invention;

fig. 4 is a schematic view of the rectangular parallelepiped bracket of the present invention.

Reference numerals:

1. clamping jaw 2, tetragonal body support 3 and tetragonal body sliding sleeve

4. Stress application rod

Detailed Description

The technical solution of the present invention will be described in detail with reference to the accompanying drawings.

1. Design requirements

The LACU single switch button is in the cockpit of the helicopter, under the central console. During the process of assembling, disassembling and disassembling the LACU single switch button, the following problems can be caused due to improper use of tools: firstly, the circuit has poor contact and loose combination parts; secondly, deformation and damage of the LACU button head, the LACU switch base body and the contact pin; the LACU adjusting knob shell is broken, and the top cap falls off; fourthly, the disassembly and assembly time is long, and the working efficiency is low.

Therefore, the structural characteristics of the LACU are analyzed aiming at the problem of dismounting the single switch button of the LACU, the peripheral working limitation conditions are fully considered, and the problems of scratching, cracking and deformation, deformation of a contact pin, deformation and scratching of a switch pressure spring and the like caused by using common tools are solved.

2. Functional design

The switch button is functionally decomposed according to military requirements, the material and the structural characteristics of the switch button are fully considered, and the premise is that the surface of a shell of the switch button cannot be scratched, the head of the switch button cannot be damaged, and other parts cannot be damaged; the switch button head is fixed in a clamping mode in the assembling and disassembling process of the switch button head, and the button head is separated from the switch base in a pulling mode.

3. Structural design

According to the first design scheme, a two-side clamping and pulling mode is adopted in the design of the button head puller according to the size design of the LACU single switch button.

The design scheme II comprises the following steps: a switch button head puller is designed according to the size of an LACU single switch button, and a four-side clamping and pulling mode is adopted in the puller design.

Scheme two contrast scheme one, two stress surfaces have been increased, the tight load of instrument to the clamp of button has been reduced, it presss from both sides tightly and draws the strength to have increased on the whole, operating efficiency is improved and the button edge has been protected, use and pull out key load demand L as an example, under the same coefficient of friction f condition, the tight load of clamp that adopts scheme one is L/2f, the tight load of clamp that adopts scheme two is L/4f, the unilateral double pressure load that has born of the button of scheme one promptly, the unilateral pressure load of button of scheme two has reduced 50%, therefore scheme two can effectively reduce the button and compress tightly the load, reduce and pull out the key damage, and the sleeve structure grasps the button more easily and conveniently promotes and pulls out.

The LACU single switch button puller adopts a four-side clamping and pulling mode in design, the head of a clamping claw adopts a friction mode, the cutting edge is folded at the forefront, the claw is pushed down to press a clamp sleeve to tightly clamp a spring claw after contacting the outer edge of a button, the claw tightly holds the edge of the button head, and the LACU single switch button is pulled out by utilizing pressure and friction force on the edge of the button head.

The puller tool of the LACU single switch button takes elasticity and strength into consideration, the claw part is made of a spring steel sheet, and the main body is made of a relatively light aluminum alloy.

The LACU single switch button is disassembled and assembled by fixing the switch button head in a four-side clamping mode, pushing the sliding block, pressing four sides of the switch button head by using the spring steel in an extruding mode, welding a small hook tip at the front end of the spring steel sheet, increasing the friction force between a special tool and the switch button head, and separating the button head from the switch base under the action of external force.

4. Material selection and processing technology

The puller of the LACU single switch button is mainly made of elastic stainless steel in consideration of elasticity and strength of the puller, the clamping jaw is mainly made of elastic stainless steel, the square support, the square sliding sleeve and the stress application rod are in consideration of weight reduction and processing technology, and light aluminum alloy materials are mainly adopted.

As shown in fig. 1, the utility model provides a puller of HC-120 helicopter LACU monomer shift knob, includes: the clamping device comprises two identical clamping jaws 1, a square support 2, a square sliding sleeve 3 and a stressing rod 4; the tetragonal sliding sleeve 3 is sleeved on the tetragonal bracket 2 and can slide on the tetragonal bracket 2 under the action of external force; the two clamping jaws 1 are vertically arranged in the tetragonal body bracket 2; through holes are symmetrically formed below a pair of opposite side plates of the tetragonal body support 2 for the stressing rod 4 to pass through, and rectangular holes are symmetrically formed above the four side plates of the tetragonal body support 2 respectively; the clamping jaw 1 consists of a rectangular bottom plate and two rectangular elastic steel sheets vertically arranged at two ends of the bottom plate; folding bulges are arranged at the same positions of the middle parts of all the elastic steel sheets, when the square sliding sleeve 3 slides to a certain position relative to the square support 2, the square sliding sleeve 3 extrudes the clamping claws 1 with the folding bulges, so that the ends of the clamping claws 1 are inwards contracted, and the LACU single switch button head is clamped.

As shown in fig. 2, the outer angle of the elastic steel sheet folding bulge on the clamping jaw is 30 degrees; the end of the elastic steel sheet is provided with concave-convex stripes for increasing friction force.

As shown in fig. 3, the rectangular sliding sleeve is a cuboid without upper and lower covers, and the size of the rectangular sliding sleeve is larger than that of the rectangular bracket, and the rectangular sliding sleeve can be sleeved on the rectangular bracket to slide.

As shown in fig. 4, the main body of the square bracket is a cuboid, the front plate and the rear plate are rectangles with the same size, and the two side plates have the same size and shape and comprise a rectangular plate and a semicircular plate above the rectangular plate; the rectangular plate has the same length as the front plate.

The utility model discloses an innovation point lies in:

LACU monomer shift knob puller utilizes the theory design of snatching the puller, the centre gripping jack catch adopts spring steel material, full play spring steel plasticity, elasticity and intensity's function, adopt the four sides centre gripping to draw the mode, increase area of contact is considered in the design, frictional force has been strengthened, the cuboid support adopts the fretwork design, be convenient for install and fixed centre gripping jack catch, the clamping-force of puller is provided by cuboid sliding sleeve, can bulldoze the folding arch in elastic steel sheet middle part from the four sides, reach and compress tightly four centre gripping jack catches of hoop tightening, and make the centre gripping jack catch follow around to the centre tighten.

The using method comprises the following steps:

let the centre gripping jack catch elastic steel piece of LACU monomer shift knob's drawer open freely, aim at the LACU monomer shift knob head that will dismantle, accurate cover is on LACU monomer shift knob head, promote the sliding sleeve of tetragonal body to slide on the support, folding arch in the middle part of the elastic steel piece of centre gripping jack catch until bulldozing, make the sliding sleeve press in the folding arch of elastic steel piece on the whole, centre gripping jack catch elastic steel piece on the drawer is under the tight condition in four sides, fasten on LACU monomer shift knob head, because the clamp force is big and even, make the overhead frictional force of centre gripping jack catch spring steel piece effect on the shift knob big, make LACU monomer shift knob head and switch base separation under the effect of external force extraction.

Note that:

1. special tools must be used for the right and proper purpose, adapted to the specific part accessory.

2. For safety and work efficiency, please check the tool often, and not use a worn or cracked tool.

3. After the elastic steel sheet is used for a long time, the phenomenon of elasticity reduction can occur, but the basic function cannot be influenced, the steel sheet with weakened elasticity is replaced in time, and the using effect of the tool is better.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art will understand that modifications and equivalent substitutions can be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and all of them shall fall within the scope of the claims of the present invention.

Claims

1. A helicopter LACU monoblock switch button extractor, comprising: the clamping device comprises two identical clamping jaws, a tetragonal bracket, a tetragonal sliding sleeve and a stressing rod; the tetragonal sliding sleeve is sleeved outside the tetragonal bracket and can slide on the tetragonal bracket under the action of external force; the two clamping jaws are vertically arranged in the tetragonal body bracket; through holes are symmetrically formed below two opposite side plates of the tetragonal body bracket and are used for a force application rod to pass through; rectangular holes are formed above the four plates of the tetragonal bracket; the clamping jaw consists of a rectangular bottom plate and two elastic steel sheets vertically arranged at two ends of the bottom plate; folding bulges are arranged in the middle of each elastic steel sheet, when the square sliding sleeve slides to a certain position relative to the square support, the square sliding sleeve extrudes the folding bulges of the clamping jaws, so that the ends of the two clamping jaws are inwards contracted, and the LACU single switch button head is clamped.

2. The helicopter LACU unit switch button extractor as claimed in claim 1, wherein the top end of the inner side of the elastic steel sheet is provided with concave-convex stripes for increasing friction force.

3. The helicopter LACU monoblock switch button extractor as claimed in claim 1 or 2, characterized in that said folded protrusion has an outer angle of 30 °.

4. The helicopter LACU monoblock switch button extractor of claim 1, wherein said clamping jaws are made of spring steel material.

5. The helicopter LACU monoblock switch button extractor of claim 1, wherein said tetragonal support and tetragonal sliding sleeve are made of aluminum alloy.

6. The helicopter LACU monoblock switch button extractor as claimed in claim 1, wherein said square bracket has a main body shape of a cuboid without upper and lower covers, a front plate and a rear plate thereof are rectangles with the same size, two side plates have the same size and shape, one side plate comprises a rectangular plate and a semicircular plate therebelow; the rectangular plate has the same length as the front plate.

7. The helicopter LACU monoblock switch button extractor of claim 6, wherein said through hole is provided at the bottom of the rectangular plate near the semicircular plate.

8. The helicopter LACU monoblock switch button extractor of claim 1, wherein the length of the rectangular hole is slightly larger than the width of the folding protrusion, and the four folding protrusions can be inserted into the four rectangular holes.