Movable base type catapult and its crimping type bumper

Abstract

The application relates to a movable base type ejector and a curl type buffer thereof in the field of braking of moving objects, and the movable base type ejector comprises a supporting platform and supporting legs; the supporting platform is used for being connected with a barrel body of the ejector; the roots of the supporting legs are connected to the supporting platform; the other ends opposite to the roots are top ends of the supporting legs; the top ends are provided with inclined curved surfaces; the supporting legs connected to the supporting platform are two, the two supporting legs are arranged in parallel and are spaced; and the two top ends are in an eight-shaped structure; when the two top ends are subjected to pressure in the direction towards the supporting platform, the two supporting legs are plastically curled and deformed in the outward-to-inward mode, so that the buffer braking is realized. The curl type buffer provided by the application has the advantages of weight reduction of more than 80% relative to a shovel type curl type buffer, simple structure and suitability for all size ejecting type storage and transportation launch barrels.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of braking of moving objects, in particular to a movable base type ejector and a coiled buffer thereof. BACKGROUND

[0002] When a missile is cold launched, a gas generator generates high pressure gas acting on the bottom of the movable base of the ejector type storage and transport launch tube, the movable base supports the missile to move upward, and pushes the missile away from the tube at a certain initial speed. The buffer installed at the mouth of the launch tube hinders the movable base from leaving the tube by buffering and braking, so as to prevent the movable base from injuring personnel or equipment when leaving the tube.

[0003] Due to the large mass, high speed and high impact energy of the movable base, and the small available space in the tube and short braking stroke of the buffer, the buffer needs to achieve effective buffering and braking in a limited space and short braking stroke, reduce the impact force, and cannot damage the structure of the launch tube.

[0004] Currently, there are two types of buffers for the movable base type ejector. One is a shovel type coiled buffer, which is installed at the mouth of the tube by a flange ring, and achieves buffering and braking of the movable base by plastic coiled deformation of two symmetrical buffer pieces inward and upward to absorb energy. The other is a baffle type buffer, which uses 15-25 layers of plastic baffles. When the movable base passes through each baffle, the energy and speed of the movable base are reduced due to the plastic deformation of the baffle to absorb energy, until the speed and energy are zero and the movable base is hindered in the tube. These two types of buffering and braking buffers have some difficult-to-overcome shortcomings and risks in use.

[0005] 1. Large structure size and weight

[0006] For example, the shovel type coiled buffer is composed of two buffer pieces and a flange ring, and the size and weight of the buffer pieces and the flange ring are large. The shovel type coiled buffer needs to be provided with a concave waist type support table on the movable base to achieve coiling effect, which greatly increases the mass of the movable base. For example, the baffle type buffer is composed of two multi-stage baffle buffer pieces and a flange ring, and the size and weight of the multi-stage baffle buffer pieces and the flange ring are large.

[0007] 2. Unstable buffering stroke

[0008] For example, the shovel type coiled buffer has an acute angle transition in the middle of the two-stage braking profile on the movable base, which causes unstable buffering stroke and large impact force. In addition, due to the inward coiling feature, the movable base braking components are increased, and the mass and braking difficulty of the tail base are increased. For example, the baffle type buffer needs about 20 baffles to achieve braking. The buffering stroke between the two stages is unstable, the braking efficiency is low, and the movable base passing through the baffles will generate a radial load on the launch tube, which has the risk of damaging the launch tube.

[0009] 3. Complex assembly and disassembly

[0010] The flange ring of the shovel type and the baffle type buffer is assembled, and multiple screws are required to fix, which is complex to install and disassemble, and time-consuming and laborious.

[0011] In view of the above buffer cannot meet the use demand, therefore, a new type of curling type buffer is invented, which can solve the above problems. Through prior art retrieval, no such prior design is found. SUMMARY

[0012] In view of the defects in the prior art, the purpose of the present application is to provide a movable base type ejector and a curling type buffer thereof.

[0013] According to the movable base type ejector curling type buffer, the support platform is used to connect with the cylinder of the ejector, the root of the support leg is connected to the support platform, the other end opposite to the root is the top end of the support leg, the top end has an inclined arc surface, the support leg connected to the support platform is two, the two support legs are arranged side by side and spaced apart, and the two top ends have an eight-shaped structure.

[0014] When the two top ends are subjected to pressure in the direction towards the support platform, the two support legs are plastically curled and deformed in the outward-inward manner, so as to realize buffer braking.

[0015] In some embodiments, the thickness of the support leg gradually increases from the top end to the root.

[0016] In some embodiments, a circular arc chamfer is formed at the connection between the root and the support platform.

[0017] In some embodiments, an ear is installed on the support platform, the ear and the support leg are located at opposite ends of the support platform respectively, and the ear is used to constrain the displacement of the support platform.

[0018] In some embodiments, the curling type buffer composed of the support platform and the support leg is multiple groups, and the multiple groups of curling type buffers are uniformly distributed along the circumference of the cylinder of the ejector.

[0019] The present application also provides a movable base type ejector adopting the movable base type ejector curling type buffer, and further comprising a braking profile, the braking profile comprises a first concave arc surface and a second concave arc surface, the first concave arc surface and the second concave arc surface are connected in a W-shaped structure, and the first concave arc surface and the second concave arc surface are respectively used to contact and apply pressure to the two support legs.

[0020] The present application also provides a movable base type ejector adopting the movable base type ejector curling type buffer, and further comprising a braking profile, the braking profile comprises a first concave arc surface and a second concave arc surface, the first concave arc surface and the second concave arc surface are connected in a W-shaped structure, and the first concave arc surface and the second concave arc surface are respectively used to contact and apply pressure to the two support legs.

[0021] In some embodiments, the first concave arc surface and the second concave arc surface are both arc-shaped concave surfaces with variable curvature, and the first concave arc surface and the second concave arc surface with variable curvature are used to ensure that the leg is plastically curled and deformed in an outward-inward manner.

[0022] Compared with the prior art, the present application has the following beneficial effects:

[0023] 1. The curling buffer provided by the present application has a weight reduction of more than 80% compared with a shovel-type curling buffer, and is simple in structure and suitable for all sizes of ejection storage and transportation launchers.

[0024] 2. The curling buffer provided by the present application is easy to assemble and disassemble, and has a small assembly cross section, so that the cross-sectional area of the launcher barrel occupied by the body is small, and the structure of the ejector is more compact.

[0025] 3. The gradually increasing thickness of the leg of the curling buffer from the end to the root can minimize the initial impact force on the movable base and gradually increase it, so that the braking effect is stable and efficient.

[0026] 4. The movable base type ejector provided by the present application improves the stability of the plastic curling deformation of the leg through the optimized design of the braking surface that restricts the deformation of the leg, and ensures the braking effect. BRIEF DESCRIPTION OF DRAWINGS

[0027] Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments, with reference to the accompanying drawings:

[0028] Figure 1 Figure 1 is a structural schematic diagram of a movable base type ejector curling buffer of the present application;

[0029] Figure 2 Figure 2 is a schematic diagram of the curling state of the movable base type ejector curling buffer of the present application;

[0030] Figure 3 Figure 3 is a schematic diagram of the movable base type ejector curling buffer and the braking surface cooperation structure of the present application. DETAILED DESCRIPTION

[0031] The present application will be described in detail below with reference to specific embodiments. The following embodiments will help those skilled in the art to further understand the present application, but do not limit the present application in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present application. These all belong to the protection scope of the present application.

[0032] Example 1

[0033] The present embodiment provides a coiled buffer for a movable base type ejector, as shown in the accompanying drawings, comprising a support platform 1 and two legs 2 mounted on the support platform 1. The support platform 1 is mounted on the barrel mouth of the projectile launching barrel of the ejector by screws. In some embodiments, the support platform 1 is provided with an ear 11 on the side away from the legs 2. The ears 11 are arranged on the left and right sides, and after the support platform 1 is fitted into the barrel mouth of the projectile launching barrel, the ears 11 constrain the displacement of the support platform 1 by being embedded in the barrel mouth of the projectile launching barrel. Figures 1-2

[0034] The legs 2 are made of plastic material and can be coiled and deformed. The two ends of the legs 2 are respectively a root 21 and a top end 22. The end face of the root 21 is connected to the support platform 1. The legs 2 connected to the support platform 1 are two, and the two legs 2 are arranged side by side and spaced apart. In some embodiments, the connection between the root 21 and the support platform 1 is treated by a smooth chamfer to form a circular arc chamfer 211, which can effectively disperse the impact force received by the legs 2 and improve the buffering performance of the legs while achieving local reinforcement. The top end 22 has an inclined arc surface, and the design of the inclined arc surface of the top end 22 makes the two legs 2 form a splayed structure at the top end, which can better receive external force and guide the deformation of the legs 2.

[0035] The working principle of the coiled buffer for the movable base type ejector provided by the present embodiment is as follows: when the movable base of the ejector moves at a certain speed to the top end 22 of the leg 2, the two top ends 22 of the two legs 2 are in contact with the corresponding brake profile on the movable base, and the top ends 22 of the two legs 2 are coiled and deformed in a way of outward to inward after receiving external force, thereby absorbing kinetic energy through the plastic coiled deformation of the legs 2, damping the movement of the movable base to make it move at a reduced speed and eventually stop moving. Compared with the shovel type coiled buffer, the coiled buffer provided by the present invention has a weight reduction of more than 80% under a similar size launching barrel, and has a simple structure and is suitable for all sizes of projectile launching and storage launching barrels. At the same time, the coiled buffer provided by the present invention is easy to assemble and disassemble, and the small assembly cross section makes the occupied cross sectional area of the barrel mouth of the projectile launching barrel small, so that the structure of the ejector is more compact.

[0036] In some embodiments, the thickness of the leg 2 is designed to gradually increase from the top end 22 to the root 21. When the leg 2 is coiled and deformed plastically under external force, the gradual increase in thickness from the end to the root makes the deformation resistance gradually increase. Since the speed of the movable base when it initially contacts the leg 2 is the maximum, the initial impact force received by the movable base can be reduced to the minimum and gradually increased, so that the braking effect is stable and efficient.

[0037] Embodiment 2

[0038] ​The embodiment 2 is a movable base type ejector formed on the basis of the embodiment 1, adopts the coiled buffer for the movable base type ejector as described in the embodiment 1, and further comprises a braking profile 6 for contacting and applying external force to the coiled buffer.

[0039] As shown in Figure 3 The overall structure of the braking profile 6 cooperating with and constraining the legs 2 to coil is W-shaped. The braking profile 6 comprises a first concave arc surface 61 and a second concave arc surface 62, and the first concave arc surface 61 and the second concave arc surface 62 are connected to form the W-shaped braking profile 6. The extension line of the middle connection of the first concave arc surface 61 and the second concave arc surface 62 is located between the two legs 2. The braking profile 6 is installed on the movable base. When the braking profile 6 moves upward at a high speed along with the movable base for a predetermined distance, the top ends 22 of the two legs 2 respectively enter the first concave arc surface 61 and the second concave arc surface 62, and with the continuous upward movement of the braking profile 6, the two legs 2 are respectively plastically coiled and deformed under the constraint of the arc surfaces of the first concave arc surface 61 and the second concave arc surface 62. The movable base type ejector provided in the embodiment improves the stability of the plastic coiling deformation of the legs through the optimized design of the braking profile for constraining the deformation of the legs, and ensures the braking effect.

[0040] In some embodiments, the first concave arc surface 61 and the second concave arc surface 62 are both variable-curvature concave surfaces. The curvature change of the first concave arc surface 61 and the second concave arc surface 62 is mainly to enable the legs 2 to be stably plastically coiled and deformed in the outward-inward manner, and the curvature change is mainly that the curvature decreases from the entry point to the exit point of the top end 22, so as to ensure that the coiling manner of the legs 2 is in the predetermined outward-inward manner.

[0041] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0042] The specific embodiments of the present application are described above. It should be understood that the present application is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essential content of the present application. The embodiments of the present application and the features in the embodiments can be arbitrarily combined with each other without conflict.

Claims

1. A coiled buffer for a movable base type catapult, characterized in that, Includes a support platform (1) and outriggers (2); The support platform (1) is used to connect with the cylinder of the catapult. The root (21) of the support leg (2) is connected to the support platform (1). The other end opposite to the root (21) is the top end (22) of the support leg (2). The top end (22) has an inclined arc surface. There are two support legs (2) connected to the support platform (1). The two support legs (2) are arranged side by side with intervals. The two top ends (22) are in a figure-eight shape. When the two top ends (22) are subjected to pressure in the direction of the support platform (1), the two legs (2) undergo plastic curling deformation in an outward and inward manner to achieve buffer braking.

2. The coiled buffer for a movable base type catapult according to claim 1, characterized in that, The thickness of the leg (2) gradually increases from the top (22) to the root (21).

3. The coiled buffer for a movable base type catapult according to claim 1, characterized in that, The root (21) forms a rounded chamfer (211) at the connection between it and the support platform (1).

4. The coiled buffer for a movable base type catapult according to claim 1, characterized in that, The support platform (1) is equipped with a lug (11), and the lug (11) and the support leg (2) are located at opposite ends of the support platform (1), respectively. The lug (11) is used to constrain the displacement of the support platform (1).

5. The coiled buffer for a movable base type catapult according to claim 1, characterized in that, The support platform (1) and the legs (2) constitute multiple sets of coiled buffers, which are evenly distributed along the circumference of the catapult's cylinder.

6. A movable base type catapult, characterized in that, The movable base type catapult with a coiled buffer as described in any one of claims 1-5 further includes a braking surface (6), the braking surface (6) including a first concave arc surface (61) and a second concave arc surface (62), the first concave arc surface (61) and the second concave arc surface (62) being connected in a W-shaped structure, the first concave arc surface (61) and the second concave arc surface (62) being respectively used to contact and apply pressure to the two legs (2).

7. The movable base type catapult according to claim 6, characterized in that, The first concave arc surface (61) and the second concave arc surface (62) are both arc-shaped concave surfaces with varying curvature. The first concave arc surface (61) and the second concave arc surface (62) with varying curvature are used to ensure that the support leg (2) is plastically curled and deformed in an outward and inward manner.

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