CN113635087A

CN113635087A - Force-limiting fixing clamp for special-shaped pressure reducer

Info

Publication number: CN113635087A
Application number: CN202110788298.7A
Authority: CN
Inventors: 刘双丽; 王雷; 王赫; 王磊
Original assignee: Shenyang Aerospace Xinguang Group Co Ltd
Current assignee: Shenyang Aerospace Xinguang Group Co Ltd
Priority date: 2021-07-13
Filing date: 2021-07-13
Publication date: 2021-11-12

Abstract

The invention provides a force-limiting fixing clamp for a special-shaped pressure reducer, wherein an elongated slot is formed in a base, the lower end of a swing rod is inserted into the slot of the base and is hinged through a bolt, a first rotating shaft is inserted into a through hole in the upper end of the swing rod and is locked through a first nut, the first rotating shaft is of a planar structure formed by butting a sector and a rectangle, a round table body is welded on the rectangular edge, the first rotating shaft is connected with the swing rod, a round through hole is machined in the first rotating shaft, a second rotating shaft is inserted into the through hole, a lower clamp is installed in a central position of the second rotating shaft, one end of the second rotating shaft is hinged with an upper metal clamp through a pin, one side of the upper metal clamp, facing the lower clamp, is in an arc shape, the upper clamp is installed at the arc, a shaft pin is installed at the other end of the second rotating shaft, and penetrates through the upper metal clamp and is locked through the nut. The invention simplifies the tool structure, reduces the number of assembly tools, realizes smooth assembly and force limitation of products, reduces the processing cost and lightens the labor intensity; the product assembly work efficiency is improved, and the product damage probability is reduced.

Description

Force-limiting fixing clamp for special-shaped pressure reducer

Technical Field

The invention belongs to the technical field of aerospace, and particularly relates to a force-limiting fixing clamp for a special-shaped pressure reducer.

Background

For aerospace systems, most products are developed in the directions of light weight and integration. At present, a plurality of models of products of pressure reduction module types in aerospace equipment are developed, and along with the development of the products, the product performance and the requirements are gradually increased. Especially the appearance and force limitation requirements of the product. Because the main connection mode of the product is threaded connection, in order to improve the looseness prevention and the sealing performance of the product, the force limiting requirements are increased on the main connector and the main connection part of the product. The product appearance structure of the pressure reducing module is a first-stage and second-stage split assembly structure, and because the product has more functions and more inlet and outlet connecting parts and assembling positions, a multi-boss non-coplanar body is formed, and the fixing difficulty in the force limiting process of the product is increased. The torque is applied to the product in the applying process, so that the product is unstable, the product is damaged by collision, even the torque is not concentric, the problem of poor sealing is easily caused, and the like, and the product performance is influenced. In the process of force limitation, the clamped part of the product is easy to be damaged to different degrees. At present, a product is clamped by a vice in a force limiting process, two planes are in contact with the cambered surface of the product for clamping, and the required clamping force is large; moreover, according to different force limiting positions, the clamping direction of the product needs to be adjusted for multiple times, and the probability of damage to the product is increased by repeated clamping operation.

In addition, the interface directions of the pressure reducing modules of different models are different, so that the difficulty that one set of tool is suitable for various models is increased. Moreover, each interface and the assembly cavity of the product have different degrees of force limiting requirements, and the tool is clamped or replaced for many times in the use process according to the tool finished by the traditional tool design scheme.

Disclosure of Invention

The invention provides a force-limiting fixing clamp for a special-shaped pressure reducer, which can meet the requirements of fixing and preventing damage of a product and can be adjusted at multiple angles, and solves the problem of damage of a clamping position in the force-limiting process of assembling the special-shaped pressure reducer.

The technical scheme adopted by the invention is as follows: the utility model provides a dysmorphism pressure reducer limit for force mounting fixture, it has the elongated slot to open on the base, and the pendulum rod lower extreme inserts in the groove of base and through the bolt hinge, peg graft first pivot in the through-hole of pendulum rod upper end and through first nut locking, first pivot is fan-shaped planar structure of constituteing with the rectangle butt joint, and the rectangle edge welds the round platform body, round platform body center welding threaded rod is connected with the pendulum rod, process circular through-hole in the first pivot, peg graft the second pivot on the through-hole, install down anchor clamps in the second pivot central point position groove, second pivot one end is articulated through round pin and metal upper fixture, metal upper fixture is arc towards lower fixture one side, and the anchor clamps are installed to the circular arc department, the pivot is installed to the second pivot other end, the pivot passes metal upper fixture and is locked through the nut.

Preferably, the lower end of the swing rod is provided with two through holes which are vertically arranged, the upper part of the swing rod is used as a rotating center by penetrating through a bolt, and the lower through hole is matched with the through hole of the base.

Preferably, the bolt is used as the circle center on the side face of the base, four through holes are formed by taking the distance between the circle centers of the two through holes of the swing rod as the radius, the first through hole is positioned under the bolt, the included angle between the second through hole and the first through hole is 30 degrees, the included angle between the third through hole and the first through hole is 60 degrees, the included angle between the fourth through hole and the first through hole is 45 degrees, the second through hole and the third through hole are positioned on one side of the first through hole, the fourth through hole is positioned on the other side of the first through hole, and any one through hole and the through hole at the lower end of the swing rod are positioned through the positioning pin.

Preferably, a slotted hole with the same shape as the cone body is processed at the upper end of the swing rod, pin holes are processed at the upper end of the swing rod, 6 through holes are uniformly distributed on the cone body along the circumference, and pins penetrate through the pin holes and the through holes on the cone body.

Preferably, the lower clamp is made of nonmetal, the lower clamp is in a cuboid shape, the overall dimension of the lower clamp is the same as the size of the groove of the second rotating shaft, the lower portion of the lower clamp is a cylindrical protrusion and is inserted into the groove of the second rotating shaft, and the lower clamp is provided with a semicircular groove body in a machining mode.

Preferably, the clamp further comprises a cushion block, the cushion block is in a semicircular ring shape, and the outline of the cushion block is the same as the shape of the semicircular groove of the lower clamp.

Preferably, go up the anchor clamps material and be nonmetal, it is the arc torus structure to go up the anchor clamps, including preceding curb plate, backplate and the arcwall face of connecting preceding curb plate, backplate, preceding curb plate and backplate are ring shape and external diameter the same, arcwall face vertical fixation is between preceding curb plate and the backplate, and the arcwall face constitutes recess form dress card on anchor clamps on the metal with preceding curb plate and backplate, the inner ring radius of backplate is less than the inner ring radius of preceding curb plate, go up the anchor clamps and divide into two kinds, be anchor clamps on one-level and the second grade respectively, the inner ring radius of anchor clamps backplate equals the internal diameter of cushion on the one-level, the inner ring radius of anchor clamps backplate equals the half-circular arc cell body internal diameter of anchor clamps down on the second grade.

Preferably, the upper surface of the first rotating shaft is uniformly distributed with at least 10 inclined circular holes along the circumference by taking the through hole as the center of a circle.

Preferably, an inclined through hole which is inclined downwards is processed at the end part of the second rotating shaft, the slope of the inclined through hole is the same as that of the round hole in the first rotating shaft, and the axis of the inclined through hole is collinear with that of the round hole in the first rotating shaft.

Preferably, the second rotating shaft and the first rotating shaft are positioned by inserting a bolt into the inclined through hole.

The invention has the beneficial effects that:

1. the invention simplifies the tool structure, reduces the number of assembly tools, realizes smooth assembly and force limitation of products, reduces the processing cost and lightens the labor intensity;

2. the invention improves the working efficiency of product assembly and reduces the damage probability of products.

Drawings

FIG. 1 is a schematic structural view of a force-limiting fixing clamp of a special-shaped pressure reducer;

FIG. 2 is a schematic view of a swing link structure;

FIG. 3 is a schematic view of a first rotating shaft structure;

FIG. 4 is a schematic view of a second rotating shaft structure;

FIG. 5 is a schematic view of a metal top clamp;

FIG. 6 is a schematic view of the lower clamp structure;

FIG. 7 is a schematic view of a spacer block structure;

FIG. 8 is a top view of the primary upper fixture;

FIG. 9 is a schematic view of a one-stage upper clamp structure;

fig. 10 is a schematic view of a two-stage upper clamp structure.

Wherein: 1-positioning pin, 2-bolt, 3-base, 4-bolt, 5-swing rod, 6-first rotating shaft, 7-first nut, 8-pin, 9-second rotating shaft, 10-metal upper clamp, 11-nut, 12-shaft pin, 13-rivet, 14-locking nut, 15-lower clamp, 16-cushion block, 17-primary upper clamp, 18-secondary upper clamp, 101-first through hole, 102-second through hole, 103-third through hole, 104-fourth through hole, 501-slotted hole, 502-pin hole, 601-round platform body, 602-through hole and 901-oblique through hole.

Detailed Description

The clamp needs to meet the requirement of universality, so that the structure of the clamp can meet the requirements of clamping different products. The clamping part adopts a split structure, namely the clamping part can be taken down and replaced. Therefore, in the using process of the tool, no matter whether the tool is abraded by nonmetal or the clamping size is not suitable, the tool can be reused only by replacing the clamping part.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The pressure reducing module has more interfaces and installation positions and inconsistent directions, and is not beneficial to completing multiple force limiting operations after one-time clamping. The clamp is required to realize multiple angle conversion when force limiting work of each interface and mounting position is finished after one-time clamping, so that each main part of the clamp rotates along an X axis, a Y axis and a Z axis, and is connected with each part through threads and fixed by nuts or pins.

As shown in figure 1, an elongated slot is formed in a base 3, the lower end of a swing rod 5 is inserted into the slot of the base 3 and is hinged through a bolt 2, a first rotating shaft 6 is inserted into a through hole in the upper end of the swing rod 5 and is locked through a first nut 7, as shown in figure 3, the first rotating shaft 6 is of a plane structure formed by butting a sector and a rectangle, a circular table body 601 is welded on the edge of the rectangle, a threaded rod is welded in the center of the circular table body 601 and is connected with the swing rod 5, a circular through hole 602 is processed in the first rotating shaft 6, a second rotating shaft 9 is inserted into the through hole 602, and the second rotating shaft 9 is locked at the lower part of the first rotating shaft 6 through a locking nut 14. As shown in fig. 4, a lower clamp 15 is installed in a groove at the center of the second rotating shaft 9, one end of the second rotating shaft 9 is hinged to an upper metal clamp 10 through a pin, one side of the upper metal clamp 10, which faces the lower clamp 15, is arc-shaped, the upper clamp is installed at the arc, a shaft pin 12 is installed at the other end of the second rotating shaft 9, and the shaft pin 12 penetrates through the upper metal clamp 10 and is locked by a nut 11.

As shown in figure 2, the lower end of the swing rod 5 is provided with two through holes which are arranged up and down, the upper part of the swing rod is used as the rotation center of the swing rod 5 relative to the base 3 by passing through the bolt 2, and the lower through hole is matched with the through hole of the base 2. The bolt 2 is used as the circle center on the side face of the base 3, four through holes are formed by taking the distance between the circle centers of the two through holes of the swing rod 5 as the radius, the first through hole 101 is located under the bolt 2, the included angle between the second through hole 102 and the first through hole 101 is 30 degrees, the included angle between the third through hole 103 and the first through hole 101 is 60 degrees, the included angle between the fourth through hole 104 and the first through hole 101 is 45 degrees, the second through hole 102 and the third through hole 103 are located on one side of the first through hole 101, the fourth through hole 104 is located on the other side of the first through hole 101, any one through hole is located with the through hole at the lower end of the swing rod 5 through the locating pin 1, and the angle of the swing rod 5 relative to the base 3 is controlled.

As shown in fig. 2 and 3, a slot 501 having the same shape as the truncated cone 601 is formed in the upper end of the swing rod 5, pin holes 502 are formed in the upper end of the

swing rod

5, 6 through holes are uniformly distributed in the truncated cone 601 along the circumference, the pins 8 penetrate through the pin holes 502 and the through holes in the truncated cone 601, the first rotating shaft 6 is rotated 360 degrees relative to the swing rod by aligning the through holes in different positions of the truncated cone 601 with the pin holes 502, and then the first rotating shaft 6 and the swing rod 5 are positioned by inserting the pins 8 into the holes.

As shown in fig. 3, 20 inclined circular holes are uniformly distributed on the upper surface of the first rotating shaft 6 along the circumference with the through hole 602 as the center, that is, the angle between adjacent circular holes is 18 °. As shown in fig. 4, an oblique through hole 901 is formed at an end of the second rotating shaft 9, the slope of the oblique through hole 901 is the same as the slope of the circular hole on the first rotating shaft 6, and the axis of the oblique through hole 901 is collinear with the axis of the circular hole on the first rotating shaft 6. The second rotating shaft 9 and the first rotating shaft 6 are positioned by inserting the bolt 4 into the inclined through hole 901. Through the different round holes of oblique through-hole 901 and first pivot 6 counterpoint, realized that second pivot 9 can 360 degrees rotations on first pivot 6 to fix a position on certain angle. Different numbers of inclined circular holes can be processed on the upper surface of the first rotating shaft 6 according to the processing requirements of products. Every product limit force position and direction are different, in order to reduce the clamping number of times of product limit force in-process, can 360 rotations in the level after considering at first the product clamping, consequently second pivot 9 designs for the lower extreme is threaded connection's cylinder, inserts and fixes with two lock nut 14 and bolt 4 behind the first pivot I downthehole, when needing the direction of rotation, extracts bolt 4, unclamps lock nut 14, installs bolt 4 after rotatory suitable angle, screws up lock nut and fixes second pivot 9.

As shown in fig. 6, the lower fixture 15 is made of nonmetal, the lower fixture 15 is rectangular, the overall dimension of the lower fixture is the same as the groove size of the second rotating shaft 9, the lower part of the lower fixture 15 is a cylindrical protrusion and is inserted into the groove of the second rotating shaft 9, and the lower fixture 15 is provided with a semicircular groove body. As shown in fig. 7, the cushion block 16 is in a semicircular ring shape, the outer contour of the cushion block 16 is the same as the shape of the semicircular groove of the lower clamp 15, and the cushion block 16 is installed in the semicircular groove of the lower clamp 15 for use.

As shown in fig. 8-10, the upper clamp is made of nonmetal, the upper clamp is of an arc-shaped torus structure, and comprises a front side plate, a back plate and a connecting front side plate, an arc-shaped surface of the back plate, the front side plate and the back plate are circular and have the same outer diameter, the arc-shaped surface is vertically fixed between the front side plate and the back plate, the arc-shaped surface, the front side plate and the back plate form a groove and are clamped on the metal upper clamp 10, the metal upper clamp 10 is tightly propped on the front side plate and the back plate by rivets 13 respectively, the inner ring radius of the back plate is smaller than that of the front side plate, the upper clamp is divided into two types, the first-level upper clamp 17 and the second-level upper clamp 18 are respectively, the inner ring radius of the back plate of the first-level upper clamp 17 is equal to the inner diameter of the cushion 16, and the inner ring radius of the inner ring of the second-level upper clamp 18 is equal to the inner diameter of a semi-circular groove body of the lower clamp 15.

And a lower clamp 15 cushion block 16 is arranged on the second rotating shaft 9, a primary upper clamp 17 is arranged on the metal upper clamp 10, and can be clamped and fixed to fix a primary shell of the pressure reduction module, the force limitation is performed after the air inlet pipe nozzle is assembled, and a product is clamped and fixed after the primary debugging is qualified, so that the locking nut 14 can conveniently lock the force limitation.

And (3) removing the cushion block 16, only installing a lower clamp 15 on the second rotating shaft 9, installing a secondary upper clamp 18 on the metal upper clamp 10, clamping and fixing a secondary shell of the pressure reduction module, and adjusting the direction by rotating the rotating shafts of all parts of the tool. The force limiting of the safety valve locking nuts, the secondary locking nut and the outlet locking nut in different directions is realized after one-time clamping, and the product clamping times are reduced.

When the device is used, the rotating and positioning functions of all parts are tested firstly, and the rotation can be realized without interference; then, two types of pressure reduction module products are taken for a clamping test, after the products are installed on a clamp, force limiting tests are carried out on each force limiting position, the clamping stability of the clamp is observed, and the abrasion condition of the clamping position on the surface of the product is checked after the tests are finished.

As a result, the product is stably clamped in the force limiting process, the multi-position force limiting function can be realized after one-time clamping, and the phenomenon that the surface film layer of the product drops is not observed.

For newly developed pressure relief modules, the assembly task can be accomplished by replacing the spacer 16 and the upper fixture. The purpose of reducing the number of assembly tools is achieved, and meanwhile, the clamping and assembling times of the product in the force limiting assembling process are reduced. The aim of injury prevention is achieved, and meanwhile, 50% of force limiting assembly time is saved. The tool has better application effect in the decomposition work.

The above description is the specific embodiment of the present invention and the technical principle applied, and any modification and equivalent transformation based on the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a dysmorphism pressure reducer limit for force mounting fixture which characterized in that: an elongated slot is formed in the base (3), the lower end of the swing rod (5) is inserted into the slot of the base (3) and is hinged through a bolt (2), a first rotating shaft (6) is inserted into a through hole in the upper end of the swing rod (5) and is locked through a first nut (7), the first rotating shaft (6) is of a planar structure formed by butting a sector and a rectangle, a round table body (601) is welded on the rectangular edge, a threaded rod is welded in the center of the round table body (601) and is connected with the swing rod (5), a round through hole (602) is processed in the first rotating shaft (6), a second rotating shaft (9) is inserted into the through hole (602), a lower clamp (15) is installed in the slot in the center position of the second rotating shaft (9), one end of the second rotating shaft (9) is hinged with an upper metal clamp (10) through a pin, one side of the upper metal clamp (10) facing the lower clamp (15) is arc-shaped, and the upper clamp is installed at the arc position, and a shaft pin (12) is arranged at the other end of the second rotating shaft (9), and the shaft pin (12) penetrates through the metal upper clamp (10) and is locked through a nut (11).

2. The force-limiting fixing clamp for the shaped pressure reducer as recited in claim 1, wherein: the lower end of the swing rod (5) is provided with two through holes which are vertically arranged, the upper part of the swing rod is used as a rotating center by penetrating through the bolt (2), and the lower through hole is matched with the through hole of the base (3).

3. The force-limiting fixing clamp for the shaped pressure reducers according to claim 2, wherein: use bolt (2) as the centre of a circle on base (3) side, it has four through-holes to open for the radius to use the distance between two through-hole centre of a circle of pendulum rod (5), and first through-hole (101) are located under bolt (2), and the contained angle of second through-hole (102) and first through-hole (101) is 30, and the contained angle of third through-hole (103) and first through-hole (101) is 60, and the contained angle of fourth through-hole (104) and first through-hole (101) is 45, second through-hole (102) and third through-hole (103) are located one side of first through-hole (101), fourth through-hole (104) are located the opposite side of first through-hole (101), and arbitrary through-hole and pendulum rod (5) lower extreme through-hole pass through locating pin (1) location.

4. The force-limiting fixing clamp for the shaped pressure reducer as recited in claim 1, wherein: the upper end of the swing rod (5) is provided with a groove hole (501) which is the same as the shape of the circular truncated cone body (601), the upper end of the swing rod (5) is provided with a pin hole (502), the circular truncated cone body (601) is uniformly provided with 6 through holes along the circumference, and the pin (8) penetrates through the pin hole (502) and the through hole on the circular truncated cone body (601).

5. The force-limiting fixing clamp for the shaped pressure reducer as recited in claim 1, wherein: lower anchor clamps (15) material is nonmetal, lower anchor clamps (15) are the cuboid shape, and overall dimension is the same with the groove size of second pivot (9), and the lower part of lower anchor clamps (15) is the protruding cartridge of cylinder in the groove of second pivot (9), lower anchor clamps (15) processing has the semicircle cell body.

6. The force-limiting fixing clamp for the shaped pressure reducer as recited in claim 5, wherein: the clamp is characterized by further comprising a cushion block (16), wherein the cushion block (16) is in a semicircular ring shape, and the outline of the cushion block (16) is the same as the shape of a semicircular arc groove of the lower clamp (15).

7. The force-limiting fixing clamp for the shaped pressure reducers according to claim 6, wherein: go up the anchor clamps material and be nonmetal, it is the arc torus structure to go up the anchor clamps, including preceding curb plate, backplate and the arcwall face of connecting preceding curb plate, backplate, preceding curb plate and backplate are ring shape and external diameter the same, arcwall face vertical fixation is between preceding curb plate and the backplate, and the arcwall face constitutes recess form dress card on anchor clamps (10) on the metal with preceding curb plate and backplate, the inner ring radius of backplate is less than the inner ring radius of preceding curb plate, go up anchor clamps and divide into two kinds, be anchor clamps (17) on the one-level and anchor clamps (18) on the second grade respectively, the inner ring radius of anchor clamps (17) backplate equals the internal diameter of cushion (16) on the one-level, the inner ring radius of anchor clamps (18) backplate equals the half-arc cell body internal diameter of anchor clamps (15) on the second grade.

8. The force-limiting fixing clamp for the shaped pressure reducer as recited in claim 1, wherein: the upper surface of the first rotating shaft (6) is uniformly distributed with at least 10 inclined circular holes along the circumference by taking the through hole (602) as the center of a circle.

9. The force-limiting fixing clamp for the shaped pressure reducers according to claim 8, wherein: an inclined through hole (901) which is inclined downwards is formed in the end portion of the second rotating shaft (9), the slope of the inclined through hole (901) is the same as that of the round hole in the first rotating shaft (6), and the axis of the inclined through hole (901) is collinear with that of the round hole in the first rotating shaft (6).

10. The force-limiting fixing clamp for the shaped pressure reducers according to claim 9, wherein: the second rotating shaft (9) and the first rotating shaft (6) are inserted into the inclined through hole (901) through the bolt (4) for positioning.