CN214110254U - Dismounting device for floating piston assembly in outer barrel of undercarriage - Google Patents

Abstract

The utility model discloses a floating piston subassembly dismounting device in undercarriage urceolus, including dismantling the positioning disk of connecting in undercarriage urceolus one end, the middle part of positioning disk is through the hollow lead screw of threaded connection, the articulated a plurality of jack catchs that can radially open or pack up of one end of lead screw, the first operation part of other end fixed connection, clearance fit ejector pin in the lead screw, the length of ejector pin is greater than the length of lead screw, the outer end fixed connection second operation part of ejector pin. The utility model discloses the action of usable first operation part sends into floating piston assembly's step hole with the jack catch on the lead screw to utilize second operation part to strut the jack catch and collude floating piston assembly's step hole, the first operation part of final back drive withdraws from the undercarriage urceolus with regard to accessible lead screw, jack catch area floating piston assembly together.

Description

Dismounting device for floating piston assembly in outer barrel of undercarriage

Technical Field

The utility model relates to an aircraft undercarriage, especially a floating piston subassembly dismounting device in undercarriage urceolus.

Background

The floating piston assembly in the outer cylinder of the landing gear generates hydraulic pressure difference by means of the difference of the gap between the circumference of the piston and the inner wall of the outer cylinder, and resists the lateral force born by the piston to float the piston, so that the abrasion is greatly reduced, and the efficiency is improved. The floating piston assembly is arranged in the outer cylinder of the landing gear along with the landing gear plunger assembly, the plunger assembly is in clearance fit with the floating piston assembly, and the floating piston assembly cannot be separated from the outer cylinder along with the plunger assembly when the plunger assembly is disassembled.

According to the design and delivery requirements of the outer cylinder of the landing gear, after the floating piston assembly and the plunger assembly are preassembled, the floating piston assembly and the plunger assembly are taken out of the outer cylinder and are decomposed into a single part state, abnormal phenomena such as scratches and the like of all matched parts are detected, and the scratches and traces of sealing and matching surfaces which move relatively are mainly detected.

In addition, when the problem is found in the running-in test of the outer cylinder of the landing gear or other tests, the floating piston assembly needs to be disassembled, and the reason of the problem needs to be searched.

The method for disassembling the floating piston assembly at present is to disassemble a valve at the head of an outer cylinder, an ejector rod enters the floating piston assembly from a phi 40 hole at the head of the outer cylinder and pushes the floating piston assembly towards the other end of the outer cylinder, and as the phi 54.5 hole at the head of the floating piston assembly, a reliable stress surface is not provided when the ejector rod is ejected, the floating piston assembly is inconvenient to eject, and the inner wall of the outer cylinder of the landing gear is easily scratched.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that, floating piston assembly does not have suitable dismounting device's not enough in to the undercarriage urceolus, provides a floating piston assembly dismounting device in the undercarriage urceolus that can conveniently dismantle floating piston assembly.

For solving the technical problem, the utility model provides a floating piston subassembly dismounting device in undercarriage urceolus, including dismantling the positioning disk of connecting in undercarriage urceolus one end, the middle part of positioning disk is through threaded connection hollow lead screw, the articulated jack catch that a plurality of ability of one end of lead screw radially opened or packed up, the first operation part of other end fixed connection, clearance fit ejector pin in the lead screw, the length of ejector pin is greater than the length of lead screw, the outer end fixed connection second operation part of ejector pin.

The utility model discloses use the screw hole assembly positioning disk of undercarriage urceolus one end as the stress point, and convert the rotary motion of handle into the linear motion of lead screw with T type threaded connection through positioning disk and lead screw, when the jack catch reachs floating piston assembly step hole position, promote the second operation part of ejector pin tip and make the center that the ejector pin reachd a plurality of jack catches, make a plurality of jack catches outwards expand simultaneously, and lock floating piston assembly step hole, the reverse rotation lead screw, the lead screw just can take floating piston assembly to break away from the urceolus, thereby the dismantlement of floating piston assembly has conveniently been realized.

For avoiding the utility model discloses take place to deflect and fish tail undercarriage urceolus inner wall in the use, the jack catch with install the positioning disk on the lead screw between the positioning disk, the periphery of positioning disk sets up first elastic component. The first elastic member is preferably a rubber ring.

In order to simply and conveniently realize radial expansion or retraction of the clamping jaws, the second elastic pieces are sleeved on the peripheries of the clamping jaws. Under the general condition, the second elastic part is compressed through the elasticity thereof and is packed up and drawn close the plurality of claws, the ejector pin stretches into between the plurality of claws, overcomes the elastic compression force of the second elastic part and just can strut the plurality of claws, and when the ejector pin withdraws from, the second elastic part utilizes its elastic deformation to pack up the plurality of claws again and draw close. The second elastic member is preferably a rubber ring.

In order to ensure the stable installation of the second elastic piece, the peripheries of the clamping jaws are provided with annular grooves, and the second elastic piece is installed in the annular grooves.

For convenience, the clamping jaws enter the stepped holes of the floating piston assembly, and the front ends of the clamping jaws are in a cone shape with gradually decreasing outer diameters.

In order to enable the clamping jaw to stably clamp the step hole of the floating piston assembly, the periphery of the clamping jaw is provided with a step surface matched with the step hole of the floating piston assembly.

For convenient operation, first operation part is the handle, second operation part is the hand wheel.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses utilize threaded connection between positioning disk and the lead screw, trun into the rotary motion of first operation part into the linear motion of lead screw simply, spare part processing is easy moreover, and intensity is moderate, and the transmission is reliable.

2. The utility model discloses a center of a plurality of jack catchs is gone into in the ejector pin top, utilizes the second elastic component atress after take place elastic deformation, and a plurality of jack catchs are outside evenly rotatory simultaneously, make the outside step face of jack catch hug closely floating piston assembly's step hole, the convenient piston assembly that will float locks the dismantlement.

3. The utility model discloses the design has the positioning disk, installs first elastic component on the positioning disk, by first elastic component along undercarriage urceolus inner wall sliding guide, in order to avoid the utility model discloses deflection is fish tail undercarriage urceolus inner wall in the use.

4. The utility model discloses utilize the screw hole threaded connection positioning disk of undercarriage urceolus tip, the hole of positioning disk forms the stress point with T type screw-thread fit on the lead screw, and supports on the undercarriage urceolus.

5. The utility model provides a dozens of years beat out floating piston assembly's problem from the urceolus head, realized leading at the positioning disk, stably collude and hold behind the floating piston assembly step hole, dismantle floating piston assembly steadily to guarantee that aircraft sealing element does not receive the destruction of power of beating, provide the powerful guarantee for the qualification rate of the various experiments of undercarriage urceolus, provide the technical support that can reference for piston assembly's dismantlement in the aircraft undercarriage urceolus of similar structure.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a two-dimensional schematic diagram of the present invention.

Fig. 2 is a three-dimensional schematic diagram of the present invention.

Fig. 3 is a two-dimensional schematic view of the jaws.

Fig. 4 is a left side view of fig. 3.

Fig. 5 is a three-dimensional schematic view of the jaws.

Figure 6 is a two-dimensional schematic view of the chuck.

Fig. 7 is a sectional view a-a of fig. 6.

Figure 8 is a three-dimensional schematic view of the chuck.

Fig. 9 is a two-dimensional schematic view of the guide plate.

Fig. 10 is a three-dimensional schematic view of the guide plate.

FIG. 11 is a two-dimensional schematic view of the puck.

FIG. 12 is a three-dimensional schematic view of the puck.

FIG. 13 is a three-dimensional schematic view of a second operative component.

Fig. 14 is a three-dimensional schematic view of a nut.

Fig. 15 is a three-dimensional schematic view of a lead screw.

Fig. 16 is a two-dimensional schematic view of the jack.

In the figure: 1. a claw; 2. a second elastic member; 3. a pin; 4. a chuck; 5. a pin; 6. a first elastic member; 7. a guide plate; 8. a lead screw; 9. a top rod; 10. positioning a plate; 11. a first operating part; 12. a nut; 13. a second operating part; 14. a floating piston assembly; 15. an outer landing gear barrel; 16. an annular groove; 17. a step surface; 18. a pin mounting hole; 19. a central bore; 20. an annular groove.

Detailed Description

The invention is further described below with reference to specific preferred embodiments, without thereby limiting the scope of protection of the invention.

For convenience of description, the relative positional relationship of the components, such as: the descriptions of the upper, lower, left, right, etc. are described with reference to the layout directions of the drawings in the specification, and do not limit the structure of the present patent.

As shown in fig. 1-16, an embodiment of the detaching device for the floating piston assembly in the landing gear outer barrel of the present invention includes a claw 1, a second elastic member 2, pins 3 (4), a collet 4, pins 5 (2), a first elastic member 6, a guiding disc 7, a lead screw 8, a mandril 9, a positioning disc 10, a first operating part 11, a nut 12, and a second operating part 13.

Clamping parts: the clamping jaw 1 is divided into four sections, each section of the clamping jaw 1 is hinged with the chuck 4 through the pins 3(4 in total), the clamping jaw 1 is in clearance fit with the pins 3, the chuck 4 is in compression fit with the pins 3, and the clamping jaw 1 can be uniformly rotated and expanded in a certain range around the pins 3 when stressed. The second elastic part 2 is arranged in an annular groove 16 on the excircle of the clamping jaw 4, when the clamping jaw is not stressed, the four petals of the clamping jaw 1 are contracted, so that the clamping jaw can enter a stepped hole of the floating piston assembly under the action of the screw rod 8, after the stress, the second elastic part 2 is elastically expanded, the clamping jaw 1 is outwards expanded, and a stepped surface 17 on the excircle surface of the clamping jaw 1 is locked with the stepped hole of the floating piston assembly. The inner hole of the chuck 4 is in clearance fit with the step shaft at the left end of the screw 8 by H7/H6 and is connected into a whole by pins 5 (2). The second elastic member 2 is preferably a rubber ring.

A guide part: the inner hole of the guide disc 7 is in clearance fit with the step shaft at the left end of the lead screw 8 by H7/H6, and two end faces of the guide disc 7 are respectively clamped and fixed by the right end face of the chuck 4 and the step face at the left end of the lead screw 8. The first resilient element 6 is seated in the outer annular groove 20 of the guide disc 7. First elastic component 6 and deflector 7 are used for the utility model discloses direction when using to fish tail undercarriage urceolus inner wall is avoided. The first elastic member 6 is preferably a rubber ring.

Transmission parts: the T-shaped screw of the screw rod 8 is arranged in the T-shaped thread of the positioning disc 10, and the rotation of the screw rod 8 drives the dismounting device to move linearly in the outer cylinder of the landing gear.

Stress parts: the positioning disc 10 is matched with the internal thread at one end of the outer cylinder of the landing gear through the external thread, a screw 8 is installed in a T-shaped thread in a hole in the middle of the positioning disc 10, and the positioning disc 10 is a stressed part of the whole dismounting device. The push rod 9 is in clearance fit in the screw rod 8, and after the screw rod 8 conveys the jaw 1 to a proper position, the push rod 9 is pushed by the second operating part 13 to extend into a central hole 19 of the jaw 1, so that the jaw 1 is radially expanded.

Operating parts: the nut 12 is in threaded connection with the screw rod 8, 4 threaded holes are uniformly distributed in the nut, and the threaded end of the first operating part 11 penetrates through the threaded holes to connect the screw rod 8 and the nut 12 into a whole. The first operating part 11 is preferably a handle. The second operating part 13 is in threaded connection with the head of the ejector rod 9, and after the second operating part is installed, three points can be spot-welded along a matching surface to prevent the second operating part 13 from falling off; the second operating element 13 is preferably a hand wheel, the outer diameter of which is knurled to facilitate manipulation of the movement of the ram 9.

The utility model discloses connection relation and effect between each part of dismounting device:

the clamping jaws 1 have four petals, each petal is in clearance connection with the chuck 4 through the pins 3, and the four pins 3 surround the chuck for one circle and are in compression fit with the pin holes of the chuck 4; four petals of the clamping jaw 1 can uniformly rotate in a certain range along the pin 3, and the outer step surface locks a step hole of the floating piston assembly. The second elastic element 2 is placed in an annular groove 16 below the excircle step surface 17 of the jaw 1, is used for contracting four lobes of the jaw 1 and enters a phi 65 step hole of the floating piston assembly under the action of the lead screw 8. The left end of the chuck 4 is provided with four grooves, and each groove is provided with a pin hole for connecting the clamping jaws 1 through pins 3; the central hole of the chuck 4 is in clearance fit with the step shaft of the screw 8, and two pin holes at the right end are tightly pressed and connected with the step shaft of the screw 8 through the pin 5, so that the chuck 4 and the screw 8 are connected into a whole; the right end face of the cartridge 4 serves to limit the axial displacement of the guide disc 7. The guide disc 7 is in clearance fit with the step shaft of the lead screw 8, the right end of the guide disc is limited by the step of the lead screw 8, the left end of the guide disc is limited by the right end face of the chuck 4, and the guide disc 7 is fixed on the step shaft of the lead screw 8; a groove is formed in the outer circular surface of the guide disc 7 and used for installing the rubber ring 6, and the rubber ring 6 slides and guides in the outer cylinder of the landing gear, so that the inner wall of the outer cylinder cannot be scratched. The screw 8 is in threaded fit with the positioning disc 10, converts the screw motion of the threads into linear motion of the screw, and is a power element of the whole dismounting device. The mandril 9 moves in the hole of the screw rod 8 with a clearance, and when the claw 1 is in place, the mandril 9 enters the central hole of the claw 1 to prop the claw 1 open. The positioning disc 10 is in threaded connection with the outer cylinder of the landing gear, and the inner hole is in threaded connection with the lead screw 8 and is a stressed element of the whole dismounting device. The first operating part 11 connects the screw 8 and the nut 12 into a whole through threads, and the rotation of the first operating part can drive the screw 8 to move forwards and backwards, and is an operating element for the movement of the screw 8. The nut 12 is connected to the threaded spindle 8 by means of a T-shaped thread, the nut 12 being used for mounting the first operating element 11. The second operating part 13 is connected with the mandril 9 through screw threads, can be spot-welded with the mandril 9 after being installed, and is an operating element for advancing and retreating the mandril 9.

The utility model discloses the theory of operation:

the screw rod 8 drives the clamping jaws 1 to penetrate into an inner hole of the outer cylinder of the landing gear, pins are inserted into 4 radially and uniformly distributed holes of the large end of the positioning disk 10 and are screwed and fixed on the outer cylinder of the landing gear, so that the external thread MJ130X1.5 of the positioning disk 10 is in threaded connection with the orifice of the outer cylinder of the landing gear until the step surface of the positioning disk 10 is tightly attached to the end surface of the outer cylinder of the landing gear, and the positioning disk 10 serves as a stress point of the whole dismounting device. The first operating element 11 is inserted into the nut 12 and connected to the lead screw 8, and the first operating element 11 is rotated clockwise, at which time the guide disc 7 carries the first elastic element 6 to advance along the inner wall of the outer cylinder, and the push rod 9 is kept still. When the distance between the left end face of the nut 12 and the right end face of the positioning disc 10 is less than or equal to 62mm, the outer step faces of the four jaws of the clamping jaw 1 reach the step hole of the floating piston assembly, and the first operating part 11 stops rotating. And then the second operating part 13 is used for pushing the mandril 9, so that after the head of the mandril 9 reaches the central hole 19 of the jaw 1, the second elastic part 2 is elastically expanded, and the four flaps of the jaw 1 rotate to expand outwards until the stepped hole of the floating piston assembly is locked. The first operating part 11 rotates reversely, the first operating part is guided by the guide disc 7 and the first elastic part 6, the lead screw 8 retreats uniformly, when half of the whole dismounting device moves to the outer barrel of the undercarriage, the positioning disc 10 is dismounted, and the dismounting device is integrally taken out of the outer barrel of the undercarriage. The second operation part 13 drives the ejector rod 9 to be drawn out from the clamping jaw 1, the second elastic piece 2 on the clamping jaw 1 contracts, the clamping jaw 1 loosens a step hole of the floating piston assembly, and the floating piston is detached.

The above description is only for the preferred embodiment of the present application and should not be taken as limiting the present application in any way, and although the present application has been disclosed in the preferred embodiment, it is not intended to limit the present application, and those skilled in the art should understand that they can make various changes and modifications within the technical scope of the present application without departing from the scope of the present application, and therefore all the changes and modifications can be made within the technical scope of the present application.

Claims (9)

1. The utility model provides a floating piston subassembly dismounting device in undercarriage urceolus, its characterized in that, is including dismantling the positioning disk of connection in undercarriage urceolus one end, the middle part of positioning disk is through the hollow lead screw of threaded connection, the articulated jack catch that a plurality of ability radially opened or packed up of one end of lead screw, the first operation part of other end fixed connection, clearance fit ejector pin in the lead screw, the length of ejector pin is greater than the length of lead screw, the outer end fixed connection second operation part of ejector pin.

2. The landing gear outer barrel floating piston assembly dismounting device is characterized in that a guide disc is mounted on a lead screw between the clamping jaws and the positioning disc, and a first elastic piece is arranged on the outer periphery of the guide disc.

3. The landing gear outer barrel floating piston assembly dismounting device according to claim 2, wherein the first elastic member is a rubber ring.

4. The landing gear outer barrel floating piston assembly dismounting device according to claim 1, wherein a second elastic piece is sleeved on the outer periphery of the plurality of jaws.

5. A landing gear outer barrel floating piston assembly dismounting device according to claim 4, wherein the second resilient member is a rubber ring.

6. The landing gear outer barrel floating piston assembly dismounting device according to claim 4, wherein an annular groove is formed in the periphery of the plurality of jaws, and the second elastic member is mounted in the annular groove.

7. A landing gear outer barrel floating piston assembly dismounting device according to any one of claims 1-6, wherein the front ends of the plurality of jaws are arranged in a cone shape with gradually decreasing outer diameter.

8. A landing gear outer barrel floating piston assembly dismounting device according to any of claims 1-6, wherein the outer circumference of the jaw is provided with a stepped surface which is matched with a stepped hole of the floating piston assembly.

9. A landing gear outer barrel floating piston assembly disassembly device according to any of claims 1 to 6, wherein the first operating part is a handle and the second operating part is a hand wheel.

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