Orthogonal connecting rod swing driving mechanism and aircraft door

Abstract

The utility model provides an orthorhombic 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 portion 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 driving mechanism has the advantages that only the short connecting rod swings, meanwhile, the lead screw serves as a supporting rod which does not swing, 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 utility model belongs to the technical field of vehicle door drive, specifically relates to a kind of orthogonal connecting rod swing drive mechanism and aircraft door. BACKGROUND

[0002] Automatic swing door as an intelligent configuration has gradually sunk from high-end luxury cars such as Rolls-Royce to 200-300,000 domestic new energy vehicles, and the driving form has changed from the original hydraulic drive to motor control. New energy vehicle electric swing door drive mechanism can be roughly divided into rocker arm connecting rod type, parallel shaft type and orthogonal drive type. Among them, the rocker arm connecting rod is manufactured by Tesla and is first launched, but it has large volume, occupies more space, is heavy, and the vehicle door needs to be customized and developed. It has been gradually replaced by parallel shaft type and orthogonal type drive mechanism. The orthogonal drive mechanism saves the push rod and gear box compared with the parallel shaft drive mechanism, and has a great cost advantage. However, it also has many deficiencies that need to be improved and optimized. The conventional worm and gear orthogonal drive mechanism will swing inside the swing door when the screw rod is pushed out. The swing needs more space inside the door for movement and avoidance. Especially when it comes to aircraft doors, since the space of the vehicle door itself is limited, if the swing amplitude inside the door needs to be reduced, the rotating shaft needs to be installed away from the skin metal support shaft. At this time, the length of the screw rod will not change, which will reduce the stroke. Increasing the length of the screw rod will increase the swing space. The overall swing drive mechanism and the fixed support inside the door can rotate. The rotating shaft is prone to loosen after long-term use. The wire harness is often bent and prone to wear and tear. It is not easy to seal the screw rod when it is pushed out and swings. SUMMARY

[0003] The utility model solves the technical problem of the prior art, and provides an orthogonal connecting rod swing drive mechanism and aircraft door which does not need the cabin door to provide additional swing space for the screw rod and has a more compact structure.

[0004] The utility model adopts the technical scheme that a kind of orthogonal connecting rod swing drive mechanism is located on door hinge, and it is characterized by comprising:

[0005] Metal support;

[0006] Fixed rod, which is connected between door hinge and metal support;

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

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

[0009] Rocking push rod movement mechanism is formed between door hinge, fixed rod, connecting rod, metal support and screw rod assembly, and electric door opening and closing is realized.

[0010] Here in this patent, the door hinge, fixed rod, connecting rod, sheet metal support and rocker arm swing of the screw assembly are matched, only the screw assembly is telescopic and not swinging in the door, only the short connecting rod is swinging, so the door or hatch does not need to provide additional swing space for the screw assembly, so the whole driving mechanism is more compact and convenient.

[0011] As a preferred, in the above-mentioned one kind of orthogonal connecting rod swing driving mechanism, the sheet metal support is connected with one end of the connecting rod through the first connecting pin shaft point and can rotate relative to the connecting pin shaft, the other end of the connecting rod is connected with the fixed head through the second connecting pin shaft point and rotates relative to the fixed head, and the fixed head is fixedly connected with the screw assembly.

[0012] As a preferred, in the above-mentioned one kind of orthogonal connecting rod swing driving mechanism, the door hinge has a door hinge hinge point, the two ends of the fixed rod are connected on the door hinge hinge point and the first connecting pin shaft point, and the door hinge, fixed rod, connecting rod, sheet metal support and screw assembly form a rocker arm push rod mechanism through the door hinge hinge point, first connecting pin shaft point and second connecting pin shaft point, and realize electric opening and closing door and multi-angle hovering limiting.

[0013] Here when the screw assembly rotates, the screw assembly will move forward and backward, and due to the action of the second connecting pin shaft point, the forward and backward movement of the screw assembly will be converted into swinging movement, and due to the action of the fixed rod, connecting rod, first connecting pin shaft point and door hinge hinge point, the screw assembly can move to the corresponding position according to actual needs, so as to swing to the corresponding angle position between the door hinge hinge point, first connecting pin shaft point and second connecting pin shaft point, so as to realize multi-angle hovering limiting when electrically opening and closing the door.

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

[0015] As a preferred, in the above-mentioned one kind of orthogonal connecting rod swing driving mechanism, the screw assembly includes a screw, a shell, a nut and a rear cover, the outer circle of the screw has an external thread for engaging with the internal thread of the nut, the symmetrical two side surfaces of the screw have a planar ejection part, the rear cover has a boss surface part, and the planar ejection part of the screw and the boss surface part are flatly attached and slide.

[0016] As preferred, in the above-mentioned orthogonal connecting rod swing driving mechanism, the boss surface and the flat ejection part have a wear-resistant lubricating bushing between them, the wear-resistant lubricating bushing is sleeved on the shell, and the flat ejection part and the boss surface are flatly attached and slid. Here, the flat ejection part and the boss surface are provided at the front and rear of the screw rod, and the wear-resistant lubricating bushing improves the wear resistance of the flat ejection part and the boss surface, thereby ensuring the reliability of the screw rod.

[0017] As preferred, in the above-mentioned orthogonal connecting rod swing driving mechanism, the screw rod assembly further comprises a helical gear and a worm, the nut is provided with a pair of bearings between the nut and the shell, the nut is externally provided with the helical gear engaged with the worm, and the worm is connected with the motor and transmits the torque from the motor shaft to the nut.

[0018] As preferred, in the above-mentioned orthogonal connecting rod swing driving mechanism, the motor rotates to drive the worm to rotate through the motor shaft, the rotation of the worm drives the engaged nut to rotate orthogonally, and the inner wall of the nut is threaded to convert the rotational motion into the linear ejection motion of the screw rod.

[0019] In the patent, part of the rear cover is fixedly connected with the hatch, the main driving force in the patent is transmitted to the screw rod by driving the worm gear to rotate, the worm gear mode can improve the large thrust, when the screw rod rotates, the flat ejection part and the boss surface interact, and the force is transmitted to the rear cover and the hatch, the screw rod is used as a non-swinging support, part of the force is used to lift the door by the lever principle, the hatch does not need to provide additional swing space for the screw rod, and the structure is more compact.

[0020] As preferred, in the above-mentioned orthogonal connecting rod swing driving mechanism, the rear cover is fixedly provided with a dust cover, and the screw rod is located in the dust cover. The dust cover can prevent impurities and dust from entering the screw rod, thereby affecting the normal use of the screw rod.

[0021] As preferred, in the above-mentioned orthogonal connecting rod swing driving mechanism, a waterproof sealing ring is arranged between the bearing and the shell. The waterproof sealing ring can ensure the sealing property between the bearing and the shell, 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 driving mechanism.

[0023] Compared with the prior art, the utility model has the advantages that:

[0024] 1、The screw rod of the patent only stretches and does not swing in the door, only the short connecting rod swings, and the hatch or the cabin door does not need to provide additional swing space for the screw rod, so that the structure is more compact.

[0025] 2, The whole is fixed to the door, without rotating support, durable and stable, not loose, wiring harness will not be damaged due to fatigue bending;

[0026] 3, while using the advantages of large thrust of the worm gear orthogonal drive mechanism, using the plane ejection and convex surface part effect to eject the door, at the same time, the screw rod is used as a non swing support, a part of the force is used as a lever to lift the door, the whole drive mechanism shell and the hatch are fixed together, without the need of the hatch to provide additional swing space for the screw rod, the structure is more compact. BRIEF DESCRIPTION OF DRAWINGS

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

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

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

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

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

[0032] The following is a specific embodiment of the present application and further describes the technical scheme of the present application in combination with the drawings, but the present application is not limited to these embodiments.

[0033] In the figure, sheet metal support 100; screw rod assembly 200; screw rod 201; shell 202; nut 203; rear cover 204; wear-resistant lubricating bushing 205; helical 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 shaft point 600; second connecting pin shaft point 700; fixed head 800; plane ejection 900; convex surface part 1000; vehicle door 1001; bearing 1002; fixed rod 1003.

[0034] As Figure 1 and Figure 2As shown, the orthogonal connecting rod swing drive mechanism mainly includes sheet metal support 100, screw assembly 200, fixed rod 1003 and connecting rod 300, wherein the screw assembly 200 includes screw rod 201, shell 202, nut 203, rear cover 204, wear-resistant lubricating bushing 205, helical gear 206, worm 207, motor 208, waterproof sealing ring 209, nut 2010 and 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 support 100 and the screw assembly 200, and the fixed rod 1003 is connected between the door hinge 400 and the sheet metal support 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 support 100, thereby forming a rocker push rod motion mechanism between the door hinge 400, the connecting rod 300, the sheet metal support 100 and the screw assembly 200 and achieving electrically opening and closing the door and multi-angle hovering limiting. The main innovation of the present patent is that the connecting rod 300 is used for swing movement, the screw rod 201 can only linearly extend and retract along the axis, cannot rotate around the axis, and cannot swing, so that the screw rod 201 and the door 1001 always maintain a fixed distance and are opened together, and the door 1001 does not need to provide additional swing space for the screw rod 201, so that the structure is more compact.

[0035] Specifically, in order to realize the swing of the connecting rod 300, the sheet metal support 100 and one end of the connecting rod 300 are connected through the first connecting pin shaft point 600 and can relatively rotate around the connecting pin shaft, the other end of the connecting rod 300 and the fixed head 800 are connected through the second connecting pin shaft point 700 and relatively rotate, and the fixed head 800 is fixedly connected with the screw assembly 200. Since the first connecting pin shaft point 600 is hingedly connected, when the screw rod 201 extends, the fixed head 800 with the screw rod 201 can swing around the connecting rod 300. Similarly, since the first connecting pin shaft point 600 is hingedly connected between the sheet metal support 100 and the connecting rod 300, the connecting rod 300 also swings around the second connecting pin shaft point 700, and the door is lifted by the lever principle. The door hinge 400 has a door hinge hinge point 500, the fixed rod 1003 is arranged between the door hinge hinge point 500 and the first connecting pin shaft point 600, and the two ends of the fixed rod 1003 are connected to the door hinge hinge point 500 and the first connecting pin shaft point 600, respectively. The door hinge 400, the connecting rod 300, the sheet metal support 100 and the screw assembly 200 form a rocker push rod motion mechanism through the door hinge hinge point 500, the first connecting pin shaft point 600 and the second connecting pin shaft point 700, and achieve electrically opening and closing the door and multi-angle hovering limiting. When the door is closed, it is equivalent to 0 degrees, and under the action of the orthogonal connecting rod swing drive mechanism, the hovering limiting angle of the door is ≤85 degrees.

[0036] In addition, as a preferred embodiment, the screw rod assembly 200 comprises a screw rod 201, a housing 202, a nut 203 and a rear cover 204. The outer circle of the screw rod 201 has external threads which are engaged with the internal threads of the nut 203. The screw rod 201 has a planar ejection portion 900 on the symmetrical two side surfaces. The planar ejection portion 900 is machined flat. The rear cover 204 has a boss surface portion 1000. The planar ejection portion 900 of the screw rod 201 and the boss surface portion 1000 are flatly attached and slide. In order to ensure the durability of the sliding, the boss surface portion 1000 and the planar ejection portion 900 have a wear-resistant lubricating bushing 205. The wear-resistant lubricating bushing 205 is sleeved on the housing 202. The planar ejection portion 900, the wear-resistant lubricating bushing 205 and the boss surface portion 1000 are flatly attached and slide. Another innovation of the present patent is that when the screw rod 201 is extended and retracted, the fixed head 800 is swung along with the screw rod 201. Thus, the planar ejection portion 900 of the screw rod 201 will apply force to the boss surface portion 1000 due to the relative movement. The boss surface portion 1000 will transmit the force to the vehicle door 1001, thereby ejecting the vehicle door 1001.

[0037] In order to facilitate the driving and ensure large thrust, as a preferred embodiment, the screw rod assembly 200 further comprises a bevel gear 206, a worm 207 and a motor 208. The nut 203 and the housing 202 have a pair of bearings 1002. The nut 203 has the bevel gear 206 which is engaged with the worm 207. The worm 207 is connected with the motor 208 and transmits the torque from the motor shaft to the nut 203. The motor 208 has a Hall component for detecting the position change. After the motor shaft drives the worm 207 to rotate, the worm 207 drives the bevel gear 206 to rotate. The rotation of the nut 203 causes the screw rod 201 to extend and retract. The rotation of the motor 208 drives the worm 207 to rotate through the motor shaft. The rotation of the worm 207 drives the engaged nut 203 to rotate orthogonally. The internal threads of the nut 203 convert the rotational movement into the linear ejection movement of the screw rod 201. As a further optimization, a nut 2010 is installed on the tail of the screw rod 201. The nut 2010 can be used to limit the maximum stroke of the screw rod 201. As an optimization, a dust cover 2011 is fixed on the rear cover 204. The screw rod 201 is located in the dust cover 2011, thereby protecting the screw rod 201 from dust. The bearings 1002 and the housing 202 are provided with a waterproof sealing ring 209, thereby preventing water from entering the motor 208 through the worm 207.

[0038] As Figure 3As shown, the aircraft door provided with the above orthogonal connecting rod swing driving mechanism is taken as an example, the axis of the screw rod 201 and the connecting rod 300 are in the same line in the initial state, when the door needs to be opened, the motor 208 drives the worm 207 to rotate the nut 203, the screw rod 201 extends outward, due to the action of the connecting rod 300, the fixed head 800, the metal bracket 100 and the door hinge hinge point 500, the fixed head 800 and the connecting rod 300 swing, as shown in Figure 4 As shown, the fixed head 800 and the connecting rod 300 swing in the process by using the lever principle to lift the door 1001, the screw rod 201 simultaneously uses the plane ejection part 900 and the boss surface part 1000 to act on the door to eject, so that the whole door 1001 can be suspended in the required position, and the movement is continued to Figure 5 The final opening state, closing the door by using the motor 208 to move reversely and making the connecting rod 300 and the fixed head 800 return to the original position.

[0039] The technical features of the above-mentioned embodiments can be combined arbitrarily, in order to make the description simple, all possible combinations of the technical features in the above-mentioned embodiments are not described, however, as long as the combination of the technical features does not exist contradictory, it should be considered that it is within the scope of the present application.

[0040] The above-mentioned embodiments only express several implementation manners of the present application, the description is more specific and detailed, but it should not be understood as the limitation of the scope of the present application. It should be pointed out that, for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application.

Claims

1. A cross-link swing drive mechanism located on a door hinge, characterized by, The utility model relates to a kind of orthogonal connecting rod swing drive mechanism, including: Sheet metal support; Fixed rod, which is connected between door hinge and sheet metal support; Lead screw assembly, which is fixed on one end of fixed head; Connecting rod, which is arranged between sheet metal support and lead screw assembly, wherein the other end of fixed head is hingedly connected with one end of connecting rod, and the other end of connecting rod is hingedly connected with sheet metal support; Rocking arm push rod mechanism is formed between door hinge, fixed rod, connecting rod, sheet metal support and lead screw assembly, and electrically opening and closing door is realized.

2. A positive parallel link oscillating drive mechanism as claimed in claim 1, characterized in that Sheet metal support and one end of connecting rod are connected by first connecting pin shaft point and can rotate relatively, the other end of connecting rod and fixed head are connected by second connecting pin shaft point and can rotate relatively, and fixed head is fixedly connected with lead screw assembly.

3. A positive parallelogram oscillating drive mechanism as claimed in claim 2, characterized in that Door hinge hinging point is provided on door hinge, both ends of fixed rod are connected on door hinge hinging point and first connecting pin shaft point respectively, and rocking arm push rod mechanism is formed between door hinge, fixed rod, connecting rod, sheet metal support and lead screw assembly by door hinge hinging point, first connecting pin shaft point and second connecting pin shaft point, and electrically opening and closing door and multi-angle hovering limiting are realized.

4. A positive parallelogram oscillating drive mechanism as claimed in claim 1, characterized in that Lead screw assembly includes lead screw, shell, nut and rear cover, outer circle of lead screw is used for engaging with external thread and internal thread of nut, symmetrical two side faces of lead screw are provided with plane ejection part, rear cover is provided with boss surface part, plane ejection part of lead screw and boss surface part are planely attached and slid.

5. A positive parallelogram oscillating drive mechanism as claimed in claim 4, characterized in that Wear-resistant lubricating bushing is provided between boss surface part and plane ejection part, wear-resistant lubricating bushing is sleeved on shell, and plane ejection part and wear-resistant lubricating bushing and boss surface part are planely attached and slid.

6. A positive parallelogram oscillating drive mechanism as claimed in claim 4, characterized in that Lead screw assembly further includes helical tooth, worm and motor, a pair of bearings are provided between nut and shell, nut is provided with helical tooth on the outside, and worm engages with helical tooth, worm is connected with motor and transmits torque from motor shaft to nut.

7. A positive parallelogram oscillating drive mechanism as claimed in claim 6, characterized in that Motor rotation drives worm to rotate through motor shaft, worm rotation drives engaged nut to rotate orthogonally, and internal wall of nut is threaded, which converts rotational motion into linear ejection motion of lead screw.

8. A positive parallelogram oscillating drive mechanism as claimed in claim 4, characterized in that Rear cover is fixed with dust cover, and lead screw is located in dust cover.

9. A positive parallelogram oscillating drive mechanism as claimed in claim 6, characterized in that Waterproof sealing ring is installed between bearing and shell.

10. An aircraft door characterized by, Orthogonal connecting rod swing drive mechanism is provided, which includes any one of 1 to 9.

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