Cabin door opening and closing assisting buffer device

Abstract

The utility model discloses a cabin door opening and closing power-assisted buffering device which comprises a machine body, a cabin door, a connecting rod mechanism and a power-assisted buffering mechanism, the power-assisted buffering mechanism comprises oppositely-arranged fork-shaped protective sleeves and compression springs sleeved outside the fork-shaped protective sleeves in a penetrating mode, and space rings are fixedly arranged at the closed ends of the fork-shaped protective sleeves to prevent the compression springs from loosening from the fork-shaped protective sleeves; guide rollers are arranged at the opening ends of the fork-shaped sheaths and can roll in inner cavities of the oppositely arranged fork-shaped sheaths, so that mutual connection of the oppositely arranged fork-shaped sheaths and guiding and positioning during relative movement of the fork-shaped sheaths are realized; one end of the power-assisted buffer mechanism is connected with the fuselage, and the other end is connected with the cabin door through a link mechanism; one end of the cabin door is directly connected with the fuselage, and the other end of the cabin door is connected with the fuselage through a link mechanism, thereby providing assistance and buffering for opening and closing the cabin door.

Description

Technical Field

[0001] The utility model relates to a door opening and closing assisting and buffering device, belonging to the field of mechanical technology. Background Art

[0002] The aircraft door is the main passage for passengers to board and alight, and is also the life passage for crew members to enter and exit the cabin, belonging to the core structural components of the aircraft. Due to the large self-weight of the aircraft door, generally speaking, it is at least greater than 60 kilograms or even several hundred kilograms. During the opening and closing movement of the door, affected by the gravity, the required operating force is greater. Therefore, during the opening and closing operations of the aircraft door, an assisting and buffering device is mostly needed so that the operator can complete the opening and closing of the door alone with a smaller force.

[0003] Currently, the commonly used assisting and buffering devices mostly adopt hydraulic, pneumatic and electric types. These several assisting and buffering devices have complex structures, large weights and large volumes, and need to occupy a large space on the fuselage, and are difficult in design, installation and maintenance. Both the hydraulic and pneumatic types need to be provided with liquid storage or gas storage tanks, and there is a risk of liquid and gas leakage, resulting in the failure of the assisting and buffering. The hydraulic and pneumatic types are also easily affected by the ambient temperature and ambient air pressure, making them unable to provide the normal assisting and buffering value. While the electric type requires an independent drive motor, transmission mechanism and electrical circuit. If there is a power supply problem, it will lead to the failure of the electric assisting and buffering. Affected by the impact of aircraft takeoff and landing, the changes in altitude and temperature during aircraft flight and other aircraft use environments, the defects of the above several common assisting and buffering devices undoubtedly increase the risk and potential hazards of safe flight. Especially when an emergency occurs on the aircraft and it is necessary to quickly open the door emergently, the existing assisting and buffering devices are prone to problems such as malfunction and failure. Summary of the Utility Model

[0004] The technical solution of the utility model aims to provide a door opening and closing assisting and buffering device, which provides assistance and buffering for the operators of opening and closing the door through a mechanical assisting and buffering structure, and helps the operators open and close the door easily.

[0005] This hatch opening and closing assist buffer device includes a fuselage, a hatch, a linkage mechanism, and an assist buffer mechanism. The assist buffer mechanism includes fork-shaped sheaths arranged oppositely, a compression spring sleeved outside the fork-shaped sheaths, and a spacer ring fixedly provided at the closed end of the fork-shaped sheaths to prevent the compression spring from loosening from the fork-shaped sheaths. A guide roller is provided at the open end of the fork-shaped sheaths. The guide roller can roll in the inner cavities of the oppositely arranged fork-shaped sheaths, thereby realizing the connection of the oppositely arranged fork-shaped sheaths, as well as the guiding and positioning during the relative movement of the fork-shaped sheaths. One end of the assist buffer mechanism is connected to the fuselage, and the other end is connected to the hatch through the linkage mechanism. One end of the hatch is directly connected to the fuselage, and the other end is connected to the fuselage through the linkage mechanism, thereby providing assist buffer for operating the opening and closing of the hatch. The main idea of this technical solution is that when the hatch is in the open and closed states, the force generated by the elastic deformation of the compression spring in the stretched or compressed state provides assist buffer for the operator through the linkage device, enabling the operator to easily operate the opening and closing of the hatch.

[0006] The linkage mechanism includes a rocker arm and a first link. The rocker arm is provided with a fulcrum connection part, which divides the rocker arm into a long arm section and a short arm section. The fulcrum connection part is connected to one end of the assist buffer mechanism, the short arm section is connected to the fuselage, and the long arm section is connected to the hatch through the first link.

[0007] At least one closed end of the fork-shaped sheaths of the assist buffer mechanism is further provided with a spring adjustment mechanism, which consists of a locknut and an adjusting nut. The locknut is arranged at the distal end of the spacer ring to prevent the adjusting nut from loosening. The adjusting nut is arranged at the proximal end of the spacer ring. By pushing the spacer ring with the adjusting nut, the adjustment of the telescopic deformation of the spring is realized. It should be noted that in addition to adjusting the force generated by the deformation of the compression spring through the adjusting nut, the material of the spring, the diameter of the spring, the thickness of the spring wire, the number of springs, etc. can also be selected according to the type of the assisted part and the required assist force value to adjust the force of the spring.

[0008] Arc-shaped grooves are provided on the fork arms of the fork-shaped sheaths for the guide rollers on the opposite sheaths to reciprocate in these grooves. This makes the movement of the rollers directional. At the same time, the rollers can effectively reduce the friction during the reciprocating movement of the fork-shaped sheaths, thereby reducing the movement noise of this product and reducing the loss of the spring force.

[0009] The guide roller consists of a roller, a roller shaft, a roller bracket, and an insert nut. The roller is sleeved on the roller bracket, and the roller shaft and the insert nut are sleeved in the roller bracket to fix the roller between the through holes of the double-ear connection part of the sheath, so that the guide roller can reciprocate in the sheath chute.

[0010] The device is also provided with a locking mechanism, which is arranged at the connecting part between the short arm section of the rocker arm and the fuselage. The locking mechanism includes a locking pin, a fixed gear, a rotating gear shaft, a spring and a rear cover. The rotating gear shaft is sleeved on the rocker arm and rotates synchronously with the rocker arm. The pin passes through the rotating gear shaft, and the rotating gear shaft and the pin are matched. One end of the pin has a button. The rear cover presses the locking pin towards the fixed gear through the spring, and the fixed gear is provided with a groove matching the locking pin.

[0011] The device is also provided with a limiting mechanism, which is composed of a spherical head screw arranged on the rocker arm and a limiter arranged at the corresponding position of the cabin door.

[0012] The linkage mechanism further includes a handle, a second connecting rod and a third connecting rod. One end of the handle is connected to the connecting part between the short arm section of the rocker arm and the fuselage. The other end of the handle is sequentially connected to the cabin door through the second connecting rod and the third connecting rod.

[0013] The advantages of adopting the technical solution of the present utility model are as follows:

[0014] 1. Through a mechanical structure of the power-assisted buffer mechanism, the power assistance and buffering during the opening and closing of the cabin door are realized, so that the volume and weight of the overall device are greatly reduced, which is convenient for installation and maintenance and has higher reliability.

[0015] 2. Through the mechanical structure, the potential safety hazards of the hydraulic device or the electrical device failing are avoided. Also, the installation and maintenance costs are greatly reduced. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a schematic structural diagram of the closed state of the cabin door of the present utility model;

[0018] Figure 2 It is a schematic structural diagram of the open state of the cabin door of the present utility model;

[0019] Figure 3 It is a schematic structural diagram of the power-assisted buffer mechanism of the present utility model;

[0020] Figure 4 It is a schematic structural diagram of the guide roller of the present utility model;

[0021] Figure 5 It is a schematic structural diagram of the locking mechanism of the present utility model;

[0022] Figure 6Schematic structural diagram of the linkage mechanism of the present utility model;

[0023] Figure 7 Schematic connection diagram of the fork-shaped sheath of the present utility model;

[0024] 1 - fuselage, 2 - hatch door, 3 - first connecting rod, 4 - rocker arm, 5 - boosting and buffering mechanism, 6 - anti-loosening nut, 7 - adjusting nut, 8 - spacer, 9 - sheath through hole, 10 - double-ear connecting part of the sheath, 11 - fork-shaped sheath, 12 - compression spring, 13 - roller shaft, 14 - inserted nut, 15 - roller bracket, 16 - roller, 17 - compression spring, 18 - spring socket, 19 - rear cover, 20 - fixed gear, 21 - rotating gear shaft, 22 - third connecting rod, 23 - second connecting rod, 24 - handle, 25 - button, 26 - locking pin. Specific embodiments

[0025] Next, we will further elaborate on this hatch door opening and closing boosting and buffering device in conjunction with the accompanying drawings and specific examples.

[0026] This hatch door opening and closing boosting and buffering device includes a fuselage 1, a hatch door 2, a linkage mechanism and a boosting and buffering mechanism. The boosting and buffering mechanism includes oppositely arranged fork-shaped sheaths 11, a compression spring 12 sleeved outside the fork-shaped sheaths 11, and a spacer 8 fixedly arranged at the closed end of the fork-shaped sheaths 11 to prevent the compression spring 12 from loosening from the fork-shaped sheaths 11; a guiding roller 16 is arranged at the open end of the fork-shaped sheaths 11, and the guiding roller 16 can roll in the inner cavity of the oppositely arranged fork-shaped sheaths 11, thereby realizing the mutual connection of the oppositely arranged fork-shaped sheaths 11, as well as the guiding and positioning during the relative movement of the fork-shaped sheaths 11; in order to improve the smoothness of the reciprocating movement of the spring and the fork-shaped sheath during the elastic deformation process, reduce the wear between the sheath and the spring, and at the same time reduce the movement noise, a gasket is also arranged on the fork-shaped sheath, and the gasket can be made of Teflon material. Those skilled in the art know that the wear and noise can also be reduced by spraying a Teflon coating on the surface of the structure or using other lubricants.

[0027] Preferably, the spring is a variable stiffness spring. The wire spacing of the spring at both ends is smaller near the spacer section of the fork-shaped sheath, and the wire spacing in the middle section of the spring is larger. Specifically, the wire spacing of the spring gradually increases from both ends to the middle, thereby realizing the variable stiffness of the spring. When the spring tends to be in a compressed state, the two ends of the spring will fit together first because the wire spacing is smaller, forming a rigid connection. During the deformation of the spring, as the rigid connection area and the elastic deformation area change continuously, different acting forces generated by the elastic deformation are provided.

[0028] The spring is sleeved on the fork-shaped sheath. Through the adjusting nuts at both ends of the fork-shaped sheath, even when the fork-shaped sheath is at its maximum extension stroke, the spring remains in a compressed state. During actual installation, even when the hatch is fully closed, the fork-shaped sheath has not reached its maximum stroke, and the assisting and buffering mechanism still exerts a certain force on the hatch. As the hatch opens, the stroke of the fork-shaped sheath becomes smaller, and the spring can provide corresponding assisting force and buffering force according to the angle of the hatch, playing a damping role and achieving the effect of assisting and buffering.

[0029] One end of the assisting and buffering mechanism is connected to the fuselage 1, and the other end is connected to the hatch 2 through a linkage mechanism; one end of the hatch 2 is directly connected to the fuselage 1, and the other end is connected to the fuselage 1 through a linkage mechanism, thereby realizing the opening and closing operations of the operating hatch 1. Those skilled in the art can set the spring inside the sheath according to needs.

[0030] The linkage mechanism further includes a handle 24, a second link 23, and a third link 22. One end of the handle 24 is connected to the connecting part of the short arm section of the rocker arm 4 and the fuselage 1, and the other end of the handle 24 is finally connected to the hatch 2 through the second link 23 and the third link 22 in sequence.

[0031] When the hatch is closed, the stroke of the fork-shaped sheath is the largest, and the spring is in a relatively stretched state. When the operator opens the hatch, the spring tends to contract from the stretched state. When the hatch opens and turns downwards, driven by the linkage, the spring rotates around the connection point between the spring and the fuselage. According to the different angles of the hatch during the opening process and the different compression strokes of the spring, the spring can provide corresponding assisting force and buffering force. Therefore, the assisting force and buffering force of the spring change continuously during the rotation of the hatch. Conversely, when the hatch is in the open state, the stroke of the fork-shaped sheath is the smallest, and the spring is in a relatively compressed state. When the operator closes the hatch, the spring tends to stretch from the compressed state, providing assisting force for the operator to close the hatch. When the hatch continues to turn upwards, under the action of the operator pulling the linkage, the stroke of the fork-shaped sheath gradually becomes larger, and the spring continues to stretch. At this time, according to the different angles of the hatch during the closing process and the different compression strokes of the spring, the spring can provide corresponding assisting force and buffering force. During the deformation process of the spring between the stretched state and the compressed state, it continuously provides assisting force and buffering force for the operator to open and close the hatch.

[0032] Specifically, when the operator operates the hatch 2 to open, the handle 24 is pulled upward. The second connecting rod 23 and the third connecting rod 22 successively connected to the handle 24 transmit the thrust of the handle 24 to the hatch 2, causing the hatch 2 to flip axially along the connecting part with the fuselage 1. While the hatch 2 turns from the closed state to the open state, the compression spring 12 of the assisting and buffering mechanism tends to move towards the compressed state, providing the assisting and buffering force generated after compression deformation. And this buffering force is first provided to the handle through the rocker arm 4, converted into the assisting and buffering force when the operator pulls the handle 24. According to the different angles and different spring compression strokes during the opening process of the hatch, the spring can provide corresponding assisting and buffering forces.

[0033] During the opening process of the hatch 2, under the gravity of the hatch and the thrust provided by the handle 24 through the second connecting rod 23 and the third connecting rod 22, it continuously flips downward along the connecting part of the fuselage 1. At this time, the rotating gear shaft 21 in the locking mechanism rotates synchronously with the rocker arm 4. When the hatch 2 is opened to a predetermined position, under the push of the spring 17, the locking pin provided at one end of the rotating gear shaft 21 falls into the groove provided at the corresponding position on the fixed gear 20, completing the locking of the hatch 2. At the same time, in the limiting mechanism, the spherical head screw provided on the rocker arm contacts the limiter provided at the corresponding position of the hatch, completing the limiting action.

[0034] After the hatch 2 is opened to a fixed position, the compression spring 12 in the assisting and buffering mechanism is in the maximum compression position. At this time, if it is necessary to close the hatch 2, the operator needs to press the button provided at one end of the locking pin in the locking mechanism, and the hatch rotates slightly, causing the locking pin to disengage from the groove on the fixed gear 20. The operator pulls the handle 24 downward, and the second connecting rod 23 and the third connecting rod 22 successively connected to the handle 24 transmit the lifting force of the handle to the hatch 2, causing the hatch 2 to flip axially along the connecting part with the fuselage 1. While the hatch 2 turns from the open state to the closed state, the compression spring 12 of the assisting and buffering mechanism tends to move towards the stretched state, providing the pulling force generated after tensile deformation, and transmitting this pulling force to the handle 24 through the rocker arm 4, providing assisting and buffering for the operator when pulling the handle 24.

[0035] With the opening and closing operations of the hatch 2, while the compression spring 12 generates tensile or compressive deformation to provide assisting and buffering, the fork-shaped sheath 11 oppositely arranged connecting the fulcrum connecting part of the rocker arm 4 and the fuselage 1 reciprocates along the inner cavity of the fork-shaped sheath 11 driven by the oppositely arranged guide rollers 16. In addition to playing the role of installing and fixing the compression spring 12, the fork-shaped sheath can also accurately transmit the elastic force when the spring 12 deforms to the rocker arm 4, and finally provide assisting and buffering for the operator at the handle 24 end.

[0036] In this embodiment, at least one closed end of the fork-shaped sheath 11 of the boosting buffer mechanism is further provided with a spring adjusting mechanism, which consists of a locking nut 6 and an adjusting nut 7. The locking nut 6 is arranged at the distal end of the spacer 8 to prevent the adjusting nut 7 from loosening. The adjusting nut 7 is arranged at the proximal end of the spacer 8. By pushing the spacer 8 with the adjusting nut 7, the adjustment of the telescopic deformation of the spring 12 is realized. Since the boosting buffer mechanism is connected to the fuselage and the rocker arm, the space at the connection part with the fuselage is usually narrow and under the fuselage floor, which is not conducive to maintenance. Therefore, the spring adjusting mechanism is mostly arranged at the rocker arm end to facilitate the spring adjustment operation. According to different aircraft models, spring adjusting mechanisms can also be arranged at both ends of the fork-shaped sheath of the boosting buffer mechanism.

[0037] Only some exemplary embodiments of the present invention have been described by way of illustration. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. For example, this boosting buffer device can be diverted from the fuselage to other switch closures or lifting devices. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A hatch opening and closing assist and buffer device, characterized in that: It includes a fuselage (1), a hatch (2), a linkage mechanism and an assisting and buffering mechanism. The assisting and buffering mechanism includes fork-shaped sheaths (11) arranged oppositely, a compression spring (12) sleeved outside the fork-shaped sheaths (11), and a spacer ring (8) fixedly arranged at the closed end of the fork-shaped sheaths (11) to prevent the compression spring (12) from loosening from the fork-shaped sheaths (11); a guide roller (16) is arranged at the open end of the fork-shaped sheaths (11), and the guide roller (16) can roll in the inner cavity of the oppositely arranged fork-shaped sheaths (11), so as to realize the mutual connection of the oppositely arranged fork-shaped sheaths (11), as well as the guiding and positioning during the relative movement of the fork-shaped sheaths (11).

2. The assist buffer device for opening and closing a hatch door according to claim 1, wherein: The spring adopts a variable stiffness spring. The wire pitch of the spring at both ends near the spacer ring section of the fork-shaped sheath is smaller than that in the middle section of the spring. Specifically, the wire pitch of the spring gradually increases from both ends to the middle, thereby realizing the variable stiffness of the spring.

3. The assist buffer device for opening and closing a hatch as claimed in claim 1, wherein: One end of the assisting and buffering mechanism is connected to the fuselage (1), and the other end is connected to the hatch (2) through a linkage mechanism; one end of the hatch (2) is directly connected to the fuselage (1), and the other end is connected to the fuselage (1) through a linkage mechanism, thereby realizing the opening and closing operations of the operating hatch (2).

4. The assist buffer device for opening and closing a hatch as described in claim 3, characterized in that: The linkage mechanism further includes a handle (24), a second link (23) and a third link (22). One end of the handle (24) is connected to the connecting part of the short arm section of the rocker arm (4) and the fuselage (1), and the other end of the handle (24) is sequentially connected to the hatch (2) through the second link (23) and the third link (22).

5. The assist buffer device for opening and closing a hatch as described in claim 1, wherein: At least one closed end of the fork-shaped sheath of the assisting and buffering mechanism is further provided with a spring adjusting mechanism, which consists of a locknut and an adjusting nut. The locknut is arranged at the distal end of the spacer ring to prevent the adjusting nut from loosening; the adjusting nut is arranged at the proximal end of the spacer ring, and the spacer ring is pushed by the adjusting nut to realize the adjustment of the telescopic deformation of the spring.

6. The assisted opening and closing buffer device for a hatch door according to claim 1, wherein: The guide roller consists of a roller, a roller shaft, a roller bracket and an insert nut. The roller is sleeved on the roller bracket, and the roller shaft and the insert nut are sleeved in the roller bracket to fix the roller between the through holes of the sheath at the double-ear connection part of the sheath, so that the guide roller can reciprocate in the sheath chute.

7. The assist buffer device for opening and closing a hatch door according to claim 1, wherein: The device is further provided with a locking mechanism, which is arranged at the connecting part of the short arm section of the rocker arm and the fuselage. The locking mechanism includes a locking pin, a fixed gear, a rotating gear shaft, a spring and a rear cover. The rotating gear shaft is sleeved on the rocker arm and rotates synchronously with the rocker arm. One end of the rotating gear shaft is provided with a button, and the other end is provided with a bolt. The rear cover presses the locking pin against the fixed gear through the spring, and the fixed gear is provided with a groove matching the locking pin.

8. The assist buffer device for opening and closing a hatch door according to claim 1, wherein: The device is further provided with a limiting mechanism, which consists of a spherical head screw arranged on the rocker arm and a stopper arranged at the corresponding position of the hatch.

9. The hatch opening and closing assist buffer device according to claim 1, characterized in that: A gasket is further arranged on the fork-shaped sheath, and the gasket can be made of Teflon material.

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