Orthogonal connecting rod swing driving mechanism and aircraft door

Abstract

The invention provides an orthogonal connecting rod swing driving mechanism and an aircraft door, the driving mechanism is located on a door hinge, the driving mechanism comprises a metal plate support, a fixing rod, a lead screw assembly and a connecting rod, the end of the lead screw assembly is fixedly connected to one end of a fixing head, the connecting rod is arranged between the metal plate support and the lead screw assembly, and the fixing head is fixedly connected to the fixing head. Wherein the other end of the fixing head is hinged to one end of the connecting rod, the other end of the connecting rod is hinged to the metal plate support, a rocker arm push rod movement mechanism is formed among the door hinge, the fixing rod, the connecting rod, the metal plate support and the lead screw assembly, and electric door opening and closing and multi-angle hovering limiting are achieved. The device has the advantages that only the short connecting rod is made to swing, meanwhile, the lead screw serves as a non-swing supporting rod, a part of force tilts the door out according to the lever principle, the driving mechanism shell and the cabin door are fixedly connected together, the cabin door does not need to provide an extra swing space for the lead screw, and the structure is more compact.

Description

Technical Field

[0001] The invention belongs to the technical field of vehicle door driving, and in particular relates to an orthogonal connecting rod swing driving mechanism and an aircraft vehicle door. Background Art

[0002] As an intelligent configuration, automatic swing doors have gradually been applied from high-end luxury cars such as Rolls-Royce to domestic new energy vehicles with a price of 200,000 to 300,000 yuan. The drive form has also changed from the original hydraulic drive to motor control. The drive mechanism of electric swing doors of new energy vehicles can be roughly divided into rocker arm connecting rod type, parallel axis type and orthogonal drive type. Among them, the rocker arm connecting rod was first introduced by Tesla model s, but it is large in size, occupies a lot of space, is heavy, and the door needs to be customized and developed. It has been gradually replaced by parallel axis and orthogonal drive mechanisms. The orthogonal drive mechanism saves the push rod and gearbox compared to the parallel axis drive mechanism, and has a greater cost advantage, but it also has many shortcomings that need to be improved and optimized. The conventional worm gear orthogonal drive mechanism will swing inside the swing door while the screw is pushed out. The swinging requires a larger space inside the door for movement and avoidance, especially when it comes to aircraft doors. Since the space of the door itself is limited, if the swing amplitude in the door needs to be reduced, the rotating axis needs to be moved away from the installation axis of the skin sheet metal bracket. At this time, the unchanged screw length will reduce the stroke, and increasing the screw will increase the swing space. The overall swing drive mechanism and the fixed bracket in the door are rotatable. The rotating shaft is easy to loosen after durability. The wiring harness is often bent and prone to wear and aging. The screw is not easy to make a waterproof seal when it is extended and swung at the same time. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an orthogonal connecting rod swing drive mechanism and an aircraft door in view of the current status of the prior art, which do not require the cabin door to provide additional swing space for the screw rod and have a more compact structure.

[0004] The technical solution adopted by the present invention to solve the above technical problems is: an orthogonal connecting rod swing driving mechanism, located on the door hinge, characterized in that it includes:

[0005] Sheet metal brackets;

[0006] a retaining rod, which is connected between the door hinge and the sheet metal bracket;

[0007] A screw rod assembly, the end of which is fixedly connected to one end of the fixed head;

[0008] A connecting rod is arranged between the sheet metal bracket and the screw assembly, wherein the other end of the fixed head is hingedly connected to one end of the connecting rod, and the other end of the connecting rod is hingedly connected to the sheet metal bracket;

[0009] A rocker arm push rod motion mechanism is formed between the door hinge, the fixing rod, the connecting rod, the sheet metal bracket and the screw assembly to realize the electric opening and closing of the door.

[0010] Here in this patent, through the swinging coordination of the door hinge, fixed rod, connecting rod, sheet metal bracket and the rocker arm of the screw assembly, the screw assembly is only allowed to extend and retract in the door without swinging, and only the short connecting rod is allowed to swing. In this way, there is no need for the car door or hatch to provide additional swinging space for the screw assembly, so that the entire drive mechanism structure is more compact and convenient.

[0011] Preferably, in the above-mentioned orthogonal connecting rod swing drive mechanism, the sheet metal bracket is connected to one end of the connecting rod through a first connecting pin point and can rotate relative to each other around the connecting pin, the other end of the connecting rod is connected to the fixed head through a second connecting pin point and can rotate relative to each other, and the fixed head is fixedly connected to the screw assembly.

[0012] Preferably, in the above-mentioned orthogonal connecting rod swing drive mechanism, the door hinge has a door hinge hinge point, and the two ends of the fixed rod are respectively connected to the door hinge hinge point and the first connecting pin point, and the door hinge, fixed rod, connecting rod, sheet metal bracket and screw assembly rely on the door hinge hinge point, the first connecting pin point and the second connecting pin point to form a rocker arm push rod motion mechanism and realize electric opening and closing of the door and multi-angle hovering limit.

[0013] Here, when the screw assembly rotates, the screw assembly will move back and forth. Due to the action of the second connecting pin point, the back and forth movement of the screw assembly will be converted into a swinging motion. Because of the action of the fixed rod, the connecting rod, the first connecting pin point and the door hinge point, the screw assembly can move to the corresponding position according to actual needs, thereby swinging to the corresponding angle position between the door hinge point, the first connecting pin point and the second connecting pin point, thereby realizing multi-angle hovering limit when the door is electrically opened and closed.

[0014] In the above-mentioned orthogonal connecting rod swing drive mechanism, the hovering limit angle of the door is ≤85 degrees. The maximum hovering limit angle in this patent can reach 85 degrees, so as to facilitate entry.

[0015] Preferably, in the above-mentioned orthogonal connecting rod swing drive mechanism, the screw assembly includes a screw, a housing, a nut and a cover, the outer circle of the screw has an external thread for engaging with the internal thread of the nut, the screw has planar ejection parts on both symmetrical side surfaces, the cover has a boss surface part, and the planar ejection part of the screw and the boss surface part fit and slide in plane.

[0016] Preferably, in the above-mentioned orthogonal connecting rod swing drive mechanism, a wear-resistant lubricating bushing is provided between the boss surface and the plane ejection part, the wear-resistant lubricating bushing is sleeved on the housing, and the plane ejection part slides in contact with the wear-resistant lubricating bushing and the boss surface plane. Here, the plane ejection part and the boss surface are both arranged at the front and rear of the screw rod, and the wear resistance of the boss surface and the plane ejection part is improved by the wear-resistant lubricating bushing, thereby ensuring the reliability of the screw rod.

[0017] Preferably, in the above-mentioned orthogonal connecting rod swing drive mechanism, the screw assembly also includes helical teeth, a worm and a motor, a pair of bearings are provided between the nut and the housing, the outside of the nut has helical teeth meshing with the worm, and the worm is connected to the motor and transmits the torque transmitted from the motor shaft to the nut.

[0018] Preferably, in the above-mentioned orthogonal connecting rod swing drive mechanism, the rotation of the motor drives the worm to rotate through the motor shaft, and the rotation of the worm drives the engaged nut to rotate orthogonally. The inner wall of the nut is a thread that converts its rotational motion into a linear ejection motion of the screw.

[0019] In this patent, a part of the cover is fixedly connected to the hatch. The main driving force in this patent is to rely on the motor to drive the worm gear to rotate and transmit it to the screw. The worm gear can increase the maximum thrust. When the screw rotates, due to the interaction between the flat ejection part and the boss surface, it acts on the cover and is transmitted to the hatch to push the door out. At the same time, the screw is used as a non-swinging support rod, and part of the force is used to lift the door out using the lever principle. The hatch does not need to provide additional swinging space for the screw, and the structure is more compact.

[0020] Preferably, in the above-mentioned orthogonal connecting rod swing drive mechanism, a dust cover is fixed on the cover, and the screw rod is located in the dust cover. The dust cover can prevent foreign dust from entering the screw rod, thereby affecting the normal use of the screw rod.

[0021] Preferably, in the above-mentioned orthogonal connecting rod swing drive mechanism, a waterproof seal ring is installed between the bearing and the housing. The waterproof seal ring can ensure the sealing between the bearing and the housing, and prevent water or impurities from entering the screw rod and affecting the normal use of the screw rod.

[0022] An aircraft door, characterized by comprising the above-mentioned orthogonal connecting rod swing drive mechanism.

[0023] Compared with the prior art, the advantages of the present invention are:

[0024] 1. The lead screw of this patent only retracts and does not swing inside the door, and only the short connecting rod is allowed to swing. There is no need for the car door or hatch to provide additional swinging space for the lead screw, so the structure is more compact.

[0025] 2. The whole is fixed to the door, without a rotating bracket, so it is stable and will not loosen after being used for a long time, and the wiring harness will not be damaged due to fatigue and bending;

[0026] 3. At the same time, the advantage of the large thrust of the worm gear orthogonal drive mechanism is used to use the flat ejection part and the boss surface to push the door out. At the same time, the screw rod is used as a non-swinging support rod, and part of the force uses the lever principle to tilt the door out. The entire drive mechanism housing and the cabin door are fixed together, and the cabin door does not need to provide additional swinging space for the screw rod, so the structure is more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is the overall schematic diagram of the orthogonal connecting rod swing driving mechanism;

[0028] Figure 2 It is a schematic diagram of the internal structure of the orthogonal connecting rod swing drive mechanism;

[0029] Figure 3 It is a schematic diagram of the initial structure of the orthogonal link swing drive mechanism and the door hinge installed on the vehicle door;

[0030] Figure 4 It is a schematic diagram of the structure of the orthogonal connecting rod swing drive mechanism and the door hinge installed on the vehicle door during the opening process;

[0031] Figure 5 The invention is a schematic diagram of the structure of the orthogonal connecting rod swing drive mechanism and the door hinge installed on the vehicle door after opening. DETAILED DESCRIPTION

[0032] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0033] In the figure, sheet metal bracket 100; screw assembly 200; screw 201; housing 202; nut 203; cover 204; wear-resistant lubricating bushing 205; bevel gear 206; worm 207; motor 208; waterproof sealing ring 209; nut 2010; dust cover 2011; connecting rod 300; door hinge 400; door hinge hinge point 500; first connecting pin point 600; second connecting pin point 700; fixing head 800; plane ejection part 900; boss surface part 1000; vehicle door 1001; bearing 1002; fixing rod 1003.

[0034] like Figure 1 and Figure 2As shown, the orthogonal connecting rod swing drive mechanism mainly includes a sheet metal bracket 100, a screw assembly 200, a fixed rod 1003 and a connecting rod 300, wherein the screw assembly 200 includes a screw 201, a housing 202, a nut 203, a cover 204, a wear-resistant lubricating bushing 205, a helical gear 206, a worm 207, a motor 208, a waterproof sealing ring 209, a nut 2010 and a dust cover 2011, etc. Figure 3 As shown, the entire orthogonal connecting rod swing drive mechanism is located on the door hinge 400, and the end of the screw assembly 200 is fixedly connected to one end of the fixed head 800; the connecting rod 300 is arranged between the sheet metal bracket 100 and the screw assembly 200, and the fixed rod 1003 is connected between the door hinge 400 and the sheet metal bracket 100, wherein the other end of the fixed head 800 is hingedly connected to one end of the connecting rod 300, and the other end of the connecting rod 300 is hingedly connected to the sheet metal bracket 100, A rocker arm push rod motion mechanism is formed between the sheet metal bracket 100 and the screw assembly 200 to realize electric door opening and closing and multi-angle hovering limit. The main innovation of this patent is to use the connecting rod 300 to perform swinging motion. The screw 201 can only move in a straight line along the axis and cannot rotate around the axis or swing. In this way, the screw 201 always maintains a fixed distance from the car door 1001 and opens together. There is no need for the car door 1001 to provide additional swinging space for the screw 201, so the structure is more compact.

[0035] Specifically, in order to realize the swing of the connecting rod 300, the sheet metal bracket 100 is connected to one end of the connecting rod 300 through the first connecting pin point 600 and can rotate relative to each other around the connecting pin. The other end of the connecting rod 300 is connected to the fixed head 800 through the second connecting pin point 700 and can rotate relative to each other. The fixed head 800 is fixedly connected to the screw assembly 200. Since the first connecting pin point 600 is hingedly connected, when the screw 201 is extended, the fixed head 800 can swing around the connecting rod 300 with the screw 201. Similarly, since the first connecting pin point 600 is hingedly connected to the sheet metal bracket 100 and the connecting rod 300, the connecting rod 300 also swings around the second connecting pin point 700. The door is tilted out according to the principle, wherein the door hinge 400 has a door hinge hinge point 500, and a fixing rod 1003 is arranged between the door hinge hinge point 500 and the first connecting pin point 600, and the two ends of the fixing rod 1003 are respectively connected to the door hinge hinge point 500 and the first connecting pin point 600, and the door hinge 400, the connecting rod 300, the sheet metal bracket 100 and the screw assembly 200 rely on the door hinge hinge point 500, the first connecting pin point 600 and the second connecting pin point 700 to form a rocker arm push rod motion mechanism and realize electric opening and closing of the door and multi-angle hovering limit, where the door is closed is equivalent to 0 degrees, and under the action of the orthogonal connecting rod swing driving mechanism, the hovering limit angle of the door is ≤85 degrees.

[0036] In addition, as a preferred embodiment, the screw assembly 200 includes a screw 201, a housing 202, a nut 203 and a cover 204. The outer circle of the screw 201 has an external thread that meshes with the internal thread of the nut 203. The screw 201 has a flat ejection portion 900 on both symmetrical sides, where the flat ejection portion 900 is machined flat, and the cover 204 has a boss surface 1000. The flat ejection portion 900 of the screw 201 and the boss surface 1000 are flatly fitted and slidable. In order to ensure the durability of sliding, the boss surface 1000 and the flat ejection portion 900 are flatly fitted and slidable. 00 is provided with a wear-resistant lubricating bushing 205, the wear-resistant lubricating bushing 205 is sleeved on the shell body 202, the planar ejection part 900 slides in a plane with the wear-resistant lubricating bushing 205 and the boss surface part 1000, and another innovation of this patent is that when the screw rod 201 is extended and retracted, the fixed head 800 swings along the connecting rod 300 with the screw rod 201, so that the planar ejection part 900 of the screw rod 201 will exert force on the boss surface part 1000 due to relative movement, and the boss surface part 1000 transfers the force to the car door 1001, thereby pushing the car door 1001 out.

[0037] In addition, in order to facilitate driving and ensure a large thrust, as a preferred embodiment, the screw assembly 200 also includes helical teeth 206, a worm 207 and a motor 208. A pair of bearings 1002 are provided between the nut 203 and the housing 202. The outside of the nut 203 has helical teeth 206 that mesh with the worm 207. The worm 207 is connected to the motor 208 and transmits the torque transmitted from the motor shaft to the nut 203. Here, the motor 208 has a Hall component for detecting position changes. At the same time, the motor shaft drives the worm 207 to rotate and then drives the helical teeth 206 to rotate. After the nut 203 rotates, the screw 201 performs a telescopic movement relative to the housing 202, and the motor 208 rotates to transmit the torque through the motor shaft The worm 207 is driven to rotate, and the rotation of the worm 207 drives the meshing nut 203 to rotate orthogonally. The inner wall of the nut 203 is a thread, which converts its rotational motion into a linear ejection motion of the screw 201. As a further optimization, a nut 2010 is installed on the tail of the screw 201, and the nut 2010 can be used to limit the maximum stroke of the screw 201. As an optimization, a dust cover 2011 is fixed on the cover 204, and the screw 201 is located in the dust cover 2011, which protects the screw 201 from dust. A waterproof sealing ring 209 is installed between the bearing 1002 and the housing 202 to prevent water from entering the motor 208 cavity along the worm 207.

[0038] like Figure 3As shown, taking the aircraft door installed with the above orthogonal connecting rod swing drive mechanism as an example, in the initial state, the axis of the screw rod 201 and the connecting rod 300 are on the same straight line. When the door needs to be opened, the motor 208 drives the worm 207 to drive the nut 203 to rotate, and the screw rod 201 extends outward. Due to the action of the connecting rod 300, the fixed head 800, the sheet metal bracket 100 and the door hinge hinge point 500, the fixed head 800 and the connecting rod 300 swing, as shown in FIG. Figure 4 As shown, the fixed head 800 and the connecting rod 300 use the lever principle to lift the door 1001 out during the swing process, and the screw rod 201 uses the flat ejection part 900 and the boss surface 1000 to push the door out at the same time, so that the entire door 1001 can be suspended at a desired position and move until Figure 5 To achieve the final open state, the door can be closed by using the motor 208 to move in the reverse direction and return the connecting rod 300 and the fixed head 800 to their original positions.

[0039] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0040] The above-mentioned embodiments only express several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. An orthogonal connecting rod swing drive mechanism, located on a door hinge, characterized in that: include: Sheet metal brackets; a retaining rod, which is connected between the door hinge and the sheet metal bracket; A screw rod assembly, the end of which is fixedly connected to one end of the fixed head; A connecting rod is arranged between the sheet metal bracket and the screw assembly, wherein the other end of the fixed head is hingedly connected to one end of the connecting rod, and the other end of the connecting rod is hingedly connected to the sheet metal bracket; A rocker arm push rod motion mechanism is formed between the door hinge, the fixing rod, the connecting rod, the sheet metal bracket and the screw assembly to realize the electric opening and closing of the door.

2. An orthogonal connecting rod swing drive mechanism as claimed in claim 1, characterized in that: The sheet metal bracket is connected to one end of the connecting rod through a first connecting pin point and can rotate relatively around the connecting pin. The other end of the connecting rod is connected to the fixed head through a second connecting pin point and can rotate relatively. The fixed head is fixedly connected to the screw assembly.

3. An orthogonal connecting rod swing drive mechanism as claimed in claim 2, characterized in that: The door hinge has a door hinge hinge point, and the two ends of the fixed rod are respectively connected to the door hinge hinge point and the first connecting pin point. The door hinge, fixed rod, connecting rod, sheet metal bracket and screw assembly rely on the door hinge hinge point, the first connecting pin point and the second connecting pin point to form a rocker arm push rod motion mechanism and realize electric opening and closing of the door and multi-angle hovering limit.

4. The orthogonal connecting rod swing drive mechanism according to claim 1, characterized in that: The screw assembly includes a screw, a housing, a nut and a back cover. The outer circle of the screw is used to engage with the external thread and the internal thread of the nut. The screw has planar ejection parts on both symmetrical sides. The back cover has a boss surface. The planar ejection part of the screw and the boss surface plane fit and slide.

5. The orthogonal connecting rod swing drive mechanism according to claim 4, characterized in that: A wear-resistant lubricating bushing is arranged between the boss surface and the plane ejection part. The wear-resistant lubricating bushing is sleeved on the shell. The plane ejection part fits and slides with the wear-resistant lubricating bushing and the boss surface plane.

6. The orthogonal connecting rod swing drive mechanism according to claim 1, characterized in that: The screw assembly also includes helical teeth, a worm and a motor. A pair of bearings are provided between the nut and the housing. The outside of the nut has helical teeth meshing with the worm. The worm is connected to the motor and transmits the torque transmitted by the motor shaft to the nut.

7. An orthogonal connecting rod swing drive mechanism as claimed in claim 6, characterized in that: The rotation of the motor drives the worm to rotate through the motor shaft, and the rotation of the worm drives the meshing nut to rotate orthogonally. The inner wall of the nut is a thread that converts its rotational motion into a linear ejection motion of the screw.

8. The orthogonal connecting rod swing drive mechanism according to claim 4, characterized in that: A dust cover is fixed on the rear cover, and the screw rod is located in the dust cover.

9. The orthogonal connecting rod swing drive mechanism according to claim 6, characterized in that: A waterproof sealing ring is installed between the bearing and the housing.

10. An aircraft door, characterized in that: Includes the orthogonal connecting rod swing drive mechanism described in any one of items 1 to 9.

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