Normal pressing mechanism for hanging object of aircraft

Abstract

The utility model belongs to the field of aircraft suspender structure design, and provides an aircraft suspender normal pressing mechanism which comprises a suspender 1, a sliding block 2, a hanging beam 3 and a pressing mechanism 4. A sliding block 2 is mounted at the top of the hanging object 1 and is embedded into a guide rail groove of the hanging beam 3 through an inner side tooth surface 21, so that the hanging object 1 is hung on the hanging beam 3; a sinking groove 22 is formed in the center of the sliding block 2, a through hole 32 is formed in the position, right opposite to the sinking groove 22, of the hanging beam 3, a pressing mechanism 4 is arranged on the hanging beam 3 and correspondingly arranged in the center of the sliding block 2, and the pressing mechanism 4 penetrates through the through hole 32 of the hanging beam 3 and is right pressed on the sinking groove 22 of the sliding block 2, so that the hanging object 1 is pressed and fixed. According to the utility model, the gap between the sliding block 2 and the guide rail of the hanging beam 3 can be eliminated, the limitation on course and transverse movement can be realized, the pressing force is matched with the weight grade of the hanging object 1, and the damage to the hanging object 1 is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to aircraft suspension structure design field, in particular to a kind of aircraft suspension normal compacting mechanism. BACKGROUND

[0002] Now aircraft external suspension presents multiple style development, not only there is external fuel tank, pod but also various unmanned aerial vehicle systems, various suspensions are hung below wing or fuselage by lug or sliding block, and vibration will inevitably occur in the stage of hanging aircraft flight, and then adversely affect carrier platform or suspension structure itself. For vibration hidden danger, currently mainly through the design of anti-swing locking arm to limit sway, the mechanism is generally through the form of screw nut pair to apply external force, and through the disc with ball joint to extrude the external surface of suspension, and the operator manually tightens screw nut;Because locking arm disc and suspension are in rigid contact, extrusion damage and indentation can be caused to suspension during vibration process, and the mechanism relies on subjective feeling of operator to judge regardless of weight grade of suspension. Now a normal compacting mechanism with continuously adjustable pressure and quantitatively designed pressure is designed;The compacting mechanism acts on the high-strength part of sliding block, so that extrusion damage to suspension can not be caused, and the compacting force can be adjusted according to the weight grade of suspension, and further, the pressure is applied by elastic element, so that rigid contact can be avoided. SUMMARY

[0003] The utility model provides a kind of device that suspension is hung on carrier platform and realizes normal compacting, to solve the vibration of suspension relative to carrier platform in the stage of hanging aircraft flight, cause the severe friction and abrasion of the guide rail of hanger beam or the lug and sliding block of suspension itself.

[0004] The technical scheme of the utility model is as follows:

[0005] The utility model provides a kind of aircraft suspension normal compacting mechanism, including suspension, sliding block, hanger beam, compacting mechanism;Suspension top is installed with sliding block, and sliding block is embedded in hanger beam guide rail slot by inside tooth surface, to realize that suspension is hung on hanger beam;Sliding block center position is provided with sunken groove, and hanger beam is provided with through hole opposite sunken groove position;The hanger beam is provided with compacting mechanism, and the center position of sliding block is correspondingly arranged, and compacting mechanism is pressed on sliding block sunken groove through the through hole of hanger beam, to apply normal compacting force to suspension.

[0006] Further, the compacting mechanism is fixedly installed on the hanger beam by four screws, and realizes limiting through the through hole of hanger beam, to ensure that locking mechanism is located above sliding block.

[0007] Further, the pressing mechanism comprises a cylinder, a pressing pin, a small spring, a large spring, a plane bearing and a pressing adjusting bolt; the pressing pin is a stepped shaft structure, the upper end surface of the shaft shoulder is a support surface of the large spring, and the lower end surface is a support surface of the small spring; the bearing is installed in the cylinder and located below the pressing adjusting bolt and is attached to the pressing adjusting bolt to realize synchronous rotation with the pressing adjusting bolt; the top end of the large spring is supported on the bearing, and the bottom end is supported on the upper end surface of the shaft shoulder; the top end of the small spring is supported on the lower end surface of the shaft shoulder of the pressing pin, and the bottom end is supported on the bottom of the cylinder.

[0008] Further, the outer cylindrical surface of the shaft shoulder is matched with the hole shaft of the inner wall of the cylinder, the small cylindrical surface of the upper end of the shaft shoulder is matched with the inner diameter of the large spring, the large cylindrical surface of the lower end surface is matched with the inner diameter of the small spring, and the large spring and the pressing pin are coaxial.

[0009] Further, the large spring and the small spring are different in rigidity, the steel wire diameter of the large spring is larger than that of the small spring, and the outer diameter and the free height of the large spring are larger than or equal to those of the small spring.

[0010] Further, the plane bearing is composed of an upper ring, a lower ring and a rolling body in the middle; the upper ring is in surface contact with the pressing adjusting bolt, the pressing adjusting bolt is rotated, the plane bearing upper ring is driven to rotate by the friction force of the contact surface, the rolling body in the middle isolates the rotary motion, that is, the upper ring moves and the lower ring is static, and when the pressing adjusting bolt is rotated, the large spring, the small spring and the pressing pin do not rotate.

[0011] Further, the inner wall of the cylinder plays a guiding role and is matched with the pressing pin and the outer cylindrical surface of the shaft shoulder to realize that the pressing pin only exists in linear reciprocating motion.

[0012] Further, the pressing mechanism generates displacement by rotating the pressing adjusting bolt, changes the deformation of the large spring and the small spring to generate pressure, the force size can be obtained by converting the tightening torque of the pressing adjusting bolt, and the pressing force size is set according to the weight of the suspended object and the normal vibration level.

[0013] Further, the two sliding blocks are installed on the top of the suspended object, the two sets of pressing mechanisms are installed on the hanging beam, are respectively arranged at the top of the suspended object and the two ends of the hanging beam, and the two sets of pressing mechanisms are respectively arranged corresponding to the two sliding blocks.

[0014] Further, the sink groove on the sliding block is a circular flat-bottomed sink groove, the diameter of the sink groove is slightly larger than the diameter of the bottom of the pressing pin of the pressing mechanism, the pressing pin is matched with the sink groove to realize normal pressing, heading and transverse limiting.

[0015] The beneficial effects of the utility model are as follows:

[0016] 1. The aircraft suspension normal compression mechanism provided by the utility model can effectively eliminate the gap between the sliding block and the beam guide rail, eliminate the vibration interference of the suspension in the normal direction, and limit the lateral movement of the suspension, and the compression mechanism can adjust the compression force according to the weight level of the suspension, so that the compression force and the weight level of the suspension are matched.

[0017] 2. The aircraft suspension normal compression mechanism provided by the utility model is flexible and can effectively eliminate the damage of the rigid compression mechanism to the suspension.

[0018] 3. The aircraft suspension normal compression mechanism provided by the utility model has a compact structure, is designed in a modular manner, can effectively reduce the resistance, and is convenient for later maintenance and repair. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a three-dimensional view of the aircraft suspension normal compression mechanism of the utility model;

[0020] Figure 2 It is an exploded view of the aircraft suspension normal compression mechanism of the utility model;

[0021] Figure 3 It is a sectional view of the aircraft suspension compression mechanism of the utility model;

[0022] Figure 4 It is a schematic view of the compression pin of the aircraft suspension compression mechanism of the utility model;

[0023] Figure 5 It is a schematic view of the sliding block of the aircraft suspension compression mechanism of the utility model.

[0024] Wherein: 1 - suspension, 2 - sliding block, 3 - beam, 4 - compression mechanism, 5 - screw, 21 - inner tooth surface, 22 - sink groove, 31 - guide rail groove, 32 - through hole, 41 - cylinder, 42 - compression pin, 43 - small spring, 44 - large spring, 45 - plane bearing, 46 - compression adjusting bolt, 421 - shaft shoulder; small cylindrical surface - 422, large cylindrical surface - 423. DETAILED DESCRIPTION

[0025] This part is an embodiment of the utility model, which is used to explain and illustrate the technical scheme of the utility model. In the case of no conflict, the embodiments of the utility model and the features in the embodiments can be combined with each other.

[0026] The specific embodiments of the utility model will be further described in detail in combination with the drawings and embodiments. The following embodiments are used to illustrate the utility model, but not to limit the scope of the utility model.

[0027] As Figure 1 ,Figure 2 As shown in the figure, an aircraft suspension normal compression mechanism embodiment includes a suspension 1, a slider 2, a hanging beam 3, and a compression mechanism 4. The suspension 1 is a structural cabin with shape requirements. Two groups of sliders 2 are installed on the top of the suspension 1. The cross section of the slider 2 is U-shaped. The inner side tooth surface 21 is hung into the guide rail groove 31 of the hanging beam 3, so that the suspension 1 is hung on the hanging beam 3. The slider 2 is matched with the size of the hanging beam guide rail groove. A circular flat-bottomed groove 22 is designed on the upper surface of the slider 2. The diameter of the groove 22 is slightly larger than the diameter of the bottom of the compression pin, which ensures the cooperation of the compression pin and the groove and realizes the compression function.

[0028] The hanging beam 3 is provided with a through hole 32 at the position corresponding to the slider 2, which is used for installing the compression mechanism 4. The compression mechanism 4 is composed of two groups, which are located above the two sliders respectively. The compression mechanism 4 is an independent modular unit. Each compression mechanism is installed on the hanging beam 3 by four screws 5. The compression mechanism is an independent modular unit, which is convenient for later maintenance and protection. If damage occurs, only four screws 5 need to be disassembled to replace the entire compression mechanism 4. The hanging beam 3 can be made of lightweight high-strength materials. The front and rear ends are designed to reduce resistance. The size of the guide rail groove 31 is standardized designed. Two through holes are designed on the hanging beam, which are machined by clamping once by a machine tool, so as to ensure the accurate installation position of the compression mechanism 4.

[0029] The compression mechanism 4 includes a cylinder 41, a compression pin 42, a small spring 43, a large spring 44, a plane bearing 45, and a compression adjusting bolt 46. The compression pin 42 is a stepped shaft structure. The upper end surface of the shaft shoulder 421 of the compression pin 42 is the support surface of the large spring 44, and the lower end surface is the support surface of the small spring 43. The bearing 45 is installed in the cylinder 41 below the compression adjusting bolt 46 and is in contact with the compression adjusting bolt 46, so as to realize synchronous rotation with the compression adjusting bolt 46. The top end of the large spring 44 is supported on the bearing 45, and the bottom end is supported on the upper end surface of the shaft shoulder 421. The top end of the small spring 43 is supported on the lower end surface of the shaft shoulder 421 of the compression pin 42, and the bottom end is supported on the bottom of the cylinder 41.

[0030] The outer cylindrical surface of the shaft shoulder 421 of the compression pin 42 is matched with the inner wall hole shaft of the cylinder 41. The small cylindrical surface 422 on the upper end of the shaft shoulder 421 is matched with the inner diameter of the large spring 44, so as to ensure that the large spring 44 is coaxial with the compression pin 42. The large cylindrical surface 423 on the lower end is matched with the inner diameter of the small spring 43, so as to ensure that the small spring 43 is coaxial with the compression pin 42.

[0031] The outer cylindrical surface of the shaft shoulder 421 serves as a guide surface to ensure that the compression pin only generates normal pressure. The upper and lower end surfaces of the shaft shoulder 421 serve as the support force surfaces of the large spring 44 and the small spring 43. The upper end surface of the shaft shoulder 421 is matched with the inner diameter of the large spring to ensure that the large spring is coaxial with the compression pin. The lower end surface of the shaft shoulder 421 is matched with the inner diameter of the small spring to ensure that the small spring is coaxial with the compression pin. The compression pin 42 functions to output the spring force and apply normal pressure to the sink groove 22 of the sliding block 2.

[0032] The large spring 44 and the small spring 43 are different in rigidity. The large spring 44 can be made of 50CrVA material, with a steel wire diameter of 3mm-4mm, an outer diameter of 25mm-30mm, and a free height of 90mm-100mm. The small spring 43 can also be made of 50CrVA material, with a steel wire diameter of 1.5mm-2.5mm, an outer diameter of 30mm-45mm, and a free height of 80mm-90mm.

[0033] The large spring 44 is made of a steel wire with a larger diameter, and the small spring 43 is made of a steel wire with a relatively smaller diameter. The large spring 44 is supported at the bottom end by the upper end surface of the shaft shoulder 421 of the compression pin 42 and at the top end by the lower ring of the bearing 45. The small spring 43 is supported at the upper end by the lower end surface of the shaft shoulder 421 of the compression pin 42 and at the bottom end by the bottom of the cylinder 42. The large spring 44 and the small spring 43 can generate the required compression force through the difference in rigidity, and the compression force is applied by the spring to avoid rigid contact and prevent indentation on the suspended object.

[0034] The plane bearing 45 is composed of an upper ring, a lower ring, and rolling elements in the middle. The upper ring of the plane bearing 45 is in plane contact with the compression adjusting bolt 46, and rotating the compression adjusting bolt 46 relies on the friction force of the contact surface to drive the upper ring of the plane bearing 45 to rotate. The rolling elements in the middle isolate the rotational motion, i.e., the upper ring moves and the lower ring is stationary. The large spring 44, the small spring 43, and the compression pin 42 only have linear motion and generate normal pressure, and do not rotate around their own axes to generate friction.

[0035] The inner wall 412 of the cylinder 41 serves as a guide and cooperates with the outer cylindrical surface of the shaft shoulder 421 of the compression pin 42 to realize the linear motion of the compression pin 42. The outer wall of the cylinder 41 cooperates with the through hole 32 of the hanging beam 3 to ensure that the compression mechanism 4 is located directly above the sliding block 2.

[0036] The compression mechanism 4 is located at the central position of the sliding block 2, and a circular planar sink groove 22 is formed at the corresponding position of the sliding block 2 to ensure that the compression pin 42 cooperates with the circular planar sink groove 22. The cooperation of the compression pin and the circular sink groove 22 can generate normal compression force and realize the limiting of the heading and lateral directions.

[0037] The compression force of the compression mechanism 4 can be converted by the tightening torque of the compression adjusting bolt 46. According to the weight of the suspended object 1 and the normal vibration level, the compression adjusting bolt is rotated to change the compression force. The outer thread of the compression adjusting bolt 46 is screwed with the inner thread of the upper end of the cylinder. When the compression adjusting bolt 46 is rotated, the cylinder is displaced, further moving the plain bearing 45 along the axial direction, further changing the spring compression amount, and further generating different compression forces.

[0038] The compression mechanism 4 can be designed and installed in a modular manner. The cylinder 41, compression pin 42, small spring 43, large spring 44, plain bearing 45, and compression adjusting bolt 46 are assembled into a component, which is then installed on the beam as a whole for later maintenance and protection. If the compression mechanism is damaged, the whole component can be replaced by disassembling the screws, thereby repairing the compression mechanism.

[0039] Although the preferred embodiments of the present application have been described, those skilled in the art who once understand the basic creative concept can make additional changes and modifications to these embodiments. Therefore, the protection scope of the present application is intended to include the preferred embodiments and all changes and modifications falling within the scope of the present application. Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the present application and its equivalent technology, the present application also intends to include these modifications and variations.

Claims

1. A normal clamping mechanism for an aircraft suspension, comprising a suspension (1), a slider (2), a lifting beam (3), and a clamping mechanism (4); the top of the suspension (1) is fitted with a slider (2), which is embedded in the guide groove of the lifting beam (3) through its inner toothed surface (21), thereby enabling the suspension (1) to be mounted on the lifting beam (3); a groove (22) is provided at the center of the slider (2), and a through hole (32) is provided in the lifting beam (3) directly opposite the groove (22), characterized in that... The compression mechanism (4) is arranged on the hanging beam (3) and corresponds to the center position of the sliding block (2), the compression mechanism (4) penetrates through the through hole (32) on the hanging beam (3) and is normally pressed on the sinking groove (22) of the sliding block (2), and the normal compression force is applied to the suspended object (1).

2. The aircraft suspension normal compacting mechanism of claim 1, wherein The compression mechanism (4) comprises a cylinder (41), a compression pin (42), a small spring (43), a large spring (44), a plane bearing (45) and a compression adjusting bolt (46); the compression pin (42) is a stepped shaft structure, the upper end surface of the shaft shoulder (421) is a support surface of the large spring (44), and the lower end surface is a support surface of the small spring (43); the plane bearing (45) is installed in the cylinder (41) and located below the compression adjusting bolt (46) and is in close contact with the compression adjusting bolt (46), so that synchronous rotation with the compression adjusting bolt (46) is realized; the top end of the large spring (44) is supported on the bearing (45), and the bottom end is supported on the upper end surface of the shaft shoulder (421); the top end of the small spring (43) is supported on the lower end surface of the shaft shoulder (421) of the compression pin (42), and the bottom end is supported on the bottom of the cylinder (41).

3. The aircraft suspension normal compacting mechanism of Claim 2, wherein The outer cylindrical surface of the shaft shoulder (421) is in shaft cooperation with the inner wall hole of the cylinder (41), the small cylindrical surface (422) on the upper end of the shaft shoulder (421) is in cooperation with the inner diameter of the large spring (44), so that the large spring (44) is coaxial with the compression pin (42); and the large cylindrical surface (423) on the lower end surface is in cooperation with the inner diameter of the small spring (43), so that the small spring (43) is coaxial with the compression pin (42).

4. The aircraft suspension normal compacting mechanism of Claim 2, wherein The large spring (44) and the small spring (43) are different in rigidity, the steel wire diameter of the large spring (44) is larger than that of the small spring (43); and the outer diameter and free height of the large spring (44) are larger than or equal to those of the small spring (43).

5. The aircraft pendant normal compacting mechanism of claim 2, wherein The plane bearing (45) is composed of an upper ring, a lower ring and a rolling body in the middle; the upper ring is in plane contact with the compression adjusting bolt (46), the upper ring of the plane bearing (45) is driven to rotate by the friction force of the contact surface by rotating the compression adjusting bolt (46); the rolling body in the middle isolates the rotary motion, that is, the upper ring moves and the lower ring is static; and when the compression adjusting bolt (46) is rotated, the large spring (44), the small spring (43) and the compression pin (42) will not rotate.

6. The aircraft pendant normal compacting mechanism of claim 2, wherein The inner wall (412) of the cylinder (41) plays a guiding role and cooperates with the outer cylindrical surface of the compression pin (42) and the shaft shoulder (421), so that the compression pin (42) only exists in linear reciprocating motion.

7. The aircraft pendant normal compacting mechanism of claim 1, wherein The compression mechanism (4) generates displacement by rotating the compression adjusting bolt (46), changes the deformation of the large spring and the small spring to generate pressure, and the force can be obtained by converting the tightening torque of the compression adjusting bolt (46); and the compression force is set according to the weight of the suspended object (1) and the normal vibration level.

8. The aircraft pendant normal compacting mechanism of claim 1, wherein The sliding block (2) is installed on the top of the suspended object (1) and is two, the compression mechanism (4) is installed on the hanging beam (3) and is two groups, which are respectively arranged on the top of the suspended object (1) and the two ends of the hanging beam (3), and the two groups of compression mechanisms (4) are respectively arranged corresponding to the two sliding blocks (2).

9. The aircraft pendant normal compacting mechanism of claim 1, wherein The sink (22) on the slider (2) is a circular flat-bottomed sink, the diameter of the sink (22) is slightly larger than the diameter of the bottom of the pressing pin of the pressing mechanism, so as to ensure the cooperation of the pressing pin and the sink, realize the normal pressing, the heading and the lateral limiting.

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