A link actuator for an automobile fuel filling or charging port door

Abstract

A link actuator for an automobile fuel filling or charging port door, which comprises a first driving mechanism, a second driving mechanism and a link mechanism. The link mechanism includes link A, link B for fixing the fuel filling or charging port door, link C and link D. The top of link A is rotatably connected to one end of link B, and the top of link D is rotatably connected to one end of link C. The other end of link B is rotatably connected to the other end of link C. Link A is lifted and lowered by the first driving mechanism, and link D is lifted and lowered by the second driving mechanism. Among them, the lifting speed of link D is greater than that of link A, and through link C, link B rotates around the top of link A during the lifting process, so that the fuel filling or charging port door is opened or closed due to rotation during the lifting process.

Description

Technical Field

[0001] The present invention relates to an actuator for an automobile fuel filling or charging port door, which is used to open or close the door, and particularly relates to the link structure of the actuator. Background Art

[0002] With the continuous development and progress of the automobile industry, automatic opening and closing devices for automobile fuel filling or charging port doors have gradually been used in automobiles, so that there is no need for manual operation of the fuel filling or charging port door, and the opening and closing of the door can be automatically and conveniently realized through the actuator.

[0003] The existing opening and closing device for an automobile fuel filling or charging port door makes the door lift and rotate horizontally through the track groove and track convex point of the track screw. Since there is an axial resistance generated by friction between the track groove and track convex point of the track screw during the working process, a relatively large motor power is required, and the friction will also generate vibration and reduce the service life. When the fuel filling or charging port door rotates to the vertical position, due to the action of the gravity of the small door, the rotation of the small door is accelerated, and due to the existence of a fitting gap between the track groove and the track convex point, the small door shakes. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a link actuator for an automobile fuel filling or charging port door aiming at the above deficiencies of the prior art, which can reduce vibration and eliminate shaking, and can extend the service life.

[0005] The technical solution adopted by the present invention to solve the above technical problems is as follows: A link actuator for an automobile fuel filling or charging port door includes a driving mechanism I, a driving mechanism II and a link mechanism. The link mechanism includes link A, link B for fixing the fuel filling or charging port door, link C and link D. The top of link A is rotatably connected to one end of link B, the top of link D is rotatably connected to one end of link C, the other end of link B is rotatably connected to the other end of link C. Link A is lifted and lowered by the driving mechanism I, and link D is lifted and lowered by the driving mechanism II. Among them, the lifting speed of link D is greater than that of link A, and through link C, link B rotates around the top of link A during the lifting process, so that the fuel filling or charging port door is opened or closed due to rotation during the lifting process.

[0006] Another fueling or charging port door linkage actuator for a vehicle is also provided, which includes a first driving mechanism, a second driving mechanism, and a linkage mechanism. The linkage mechanism includes Link A, Link B for fixing the fueling or charging port door, and Link D. The top of Link A is rotatably connected to one end of Link B. The top of Link D is rotatably connected to a connecting member, and the connecting member can move in a moving groove provided in Link B. Link A is lifted and lowered by the first driving mechanism, and Link D is lifted and lowered by the second driving mechanism. Among them, the lifting speed of Link D is greater than that of Link A, and the connecting member moves in the moving groove to make Link B rotate around the top of Link A during the lifting process, so that the fueling or charging port door is opened or closed due to rotation during the lifting process.

[0007] The above-mentioned first driving mechanism and second driving mechanism can be an electric driving mechanism powered by a motor, or other driving mechanisms powered by hydraulic pressure, pneumatic pressure, etc. The driving mechanism can be a common mechanism.

[0008] Preferably, the first driving mechanism includes a main worm gear, an external thread provided on the outer cylindrical surface of Link A, a main worm, and a first driver. The main worm gear is provided with an internal thread. The external thread of Link A has the same pitch as the internal thread of the main worm gear and meshes with it. The main worm gear of the first driving mechanism is driven by the main worm, and the main worm is driven by the first driver. In this way, Link A can be lifted and lowered by rotating the main worm gear. The second driving mechanism includes an auxiliary worm gear, an external thread provided on the outer cylindrical surface of Link D, an auxiliary worm, and a second driver. The auxiliary worm gear is provided with an internal thread. The external thread of Link D has the same pitch as the internal thread of the auxiliary worm gear and meshes with it. The auxiliary worm gear of the second driving mechanism is driven by the auxiliary worm, and the auxiliary worm is driven by the second driver. In this way, Link D can be lifted and lowered by rotating the auxiliary worm gear. Moreover, the pitch of the internal thread of the auxiliary worm gear is greater than that of the internal thread of the main worm gear. In this way, during the transmission process, the lifting speed of Link D is greater than that of Link A, and Link B rotates around the top of Link A during the lifting process, so that the door body fixed on Link B rotates and opens or closes during the lifting process.

[0009] Preferably, the main worm and the auxiliary worm are the same worm, and the first driver and the second driver are the same driver. The same driver drives the same worm, and the main worm gear and the auxiliary worm gear are driven by the same worm. In this way, the structure is more compact and the transmission synchronism is better.

[0010] More specifically, the driver is a motor, and the motor can also drive the worm to rotate after being decelerated by a reducer, and then decelerate through the worm and the main worm gear and the worm and the auxiliary worm gear.

[0011] Preferably, it further includes an installation box. The driving mechanism is placed in the installation box, and Link A and Link D are placed in the installation box. The tops of Link A and Link D extend out of the installation box. In this way, the structure is simpler.

[0012] Preferably, the installation box includes a box body and a box cover. The driving mechanism is placed inside the box body, and the box cover is fixed to the box body. The tops of link A and link D extend out of the box cover, making it easier to install the driving mechanism.

[0013] Preferably, limit rings are provided at the ends of link A and link D, which can more effectively prevent link A and link D from disengaging from the main worm gear and the auxiliary worm gear respectively during operation.

[0014] Preferably, link A is connected to link B, link B is connected to link C, and link C is connected to link D by positioning pins so that they can be rotatably connected to each other, or link A is connected to link B and link B is connected to link D by positioning pins and are rotatably connected to each other, and the ends of the positioning pins are riveted. This can make the connection between them more firm and reliable and make the link rotation more flexible.

[0015] Preferably, a wear-resistant gasket is provided on the worm shaft near the end of the driven gear and the end of the worm respectively, which can effectively prevent the end face of the driving gear and the end face of the worm from rubbing against the end faces of the cylindrical bearings on both sides, preventing noise generation and reducing service life.

[0016] Preferably, a connecting block is provided on the end face of link B, and the fuel filling or charging port door is adhesively fixed to the connecting block. This can better ensure the uniformity of the gap and the control of the surface difference between the fuel filling or charging port door and the body door frame sheet metal. Moreover, by changing the adhesive position of the fuel filling or charging port door and the connecting block of link B and changing the installation position of the fuel filling or charging port door link actuator on the vehicle, the fuel filling or charging port door can be changed from opening upward to opening leftward or rightward to meet the needs of various different opening directions of the vehicle.

[0017] More specifically, the main worm gear is placed in positioning hole I of the box body and positioning hole III of the box cover, and is axially limited by positioning surface I of the box body and positioning surface III of the box cover respectively.

[0018] More specifically, the auxiliary worm gear is placed in positioning hole II of the box body and positioning hole IV of the box cover, and is axially limited by positioning surface II of the box body and positioning surface IV of the box cover respectively.

[0019] Compared with the prior art, the advantages of the present invention are as follows: The fuel filling or charging port door actuator drives link A and link D of the four-link mechanism through the driving mechanism respectively. Since the rising speeds of link A and link D are different, link B can rotate along link A while extending, and the fuel filling or charging port door fixed on link B can be opened upward, leftward or rightward. Conversely, when the driving mechanism runs in the reverse direction, the retracting speed of link D during the transmission process will be greater than that of link A, causing link B to rotate reversely along link A while retracting, and thus the fuel filling or charging port door can be closed downward, rightward or leftward. The entire operation process can reduce vibration and eliminate jitter, and extend the service life.

[0020] The design parameters of the linkage mechanism can also be changed to adjust the flipping angle per unit length of extension or retraction, facilitating the adjustment of the above design parameters according to the installation position and space of the vehicle.

[0021] The present invention also performs secondary deceleration through gear drive deceleration and double worm gear (main worm gear and auxiliary worm gear) worm drive, making its structure simpler and more compact.

[0022] Other advantages of the present invention are described in more detail in the following embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic external view of the linkage actuator for the fuel filling or charging port door of the vehicle in Embodiment 1 of the present invention.

[0024] Figure 2 is a schematic structural view of the linkage actuator for the fuel filling or charging port door of the vehicle in Embodiment 1 of the present invention after removing the box body and the box cover.

[0025] Figure 3 is a schematic structural view of the motor drive mechanism in Embodiment 1 of the present invention.

[0026] Figure 4 is a schematic structural view of the four-bar linkage mechanism in Embodiment 1 of the present invention.

[0027] Figure 5 is an exploded view of the fuel filling or charging port door linkage actuator in Embodiment 1 of the present invention.

[0028] Figure 6 is a schematic transmission view of the fuel filling or charging port door linkage actuator in Embodiment 1 of the present invention.

[0029] Figure 7 is Figure 6 a partial enlarged view of part W in

[0030] Figure 8 A schematic view of the linkage actuator for the fuel filling or charging port door of the vehicle in Embodiment 1 of the present invention in the closed position.

[0031] Figure 9 is a schematic view of the linkage actuator for the fuel filling or charging port door of the vehicle in Embodiment 1 in the upward opening position.

[0032] Figure 10 is a schematic view of the linkage actuator for the fuel filling or charging port door of the vehicle in Embodiment 1 in the leftward opening position.

[0033] Figure 11 is a schematic view of the linkage actuator for the fuel filling or charging port door of the vehicle in Embodiment 1 in the rightward opening position.

[0034] Figure 12 FIG. Figure 12 is a schematic structural diagram of a link actuator for an automobile fuel filling or charging port door according to Embodiment 2 of the present invention. Detailed Embodiment

[0035] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0036] Embodiment 1

[0037] As Figure 1-11 shown, a link actuator for an automobile fuel filling or charging port door includes an installation box, a motor drive mechanism, and a four-link mechanism.

[0038] The motor drive mechanism includes a motor 301, cylindrical bearings 302, 307, wear-resistant gaskets 303, 308, a driven gear 304, a main worm gear 305, a worm 306, an auxiliary worm gear 309, a worm shaft 3010, and a driving gear 3011.

[0039] The motor drive mechanism is installed in the installation box. The installation box includes a box body 1 and a box cover 2. Specifically, the main worm gear 305 is placed in a positioning hole formed by a combination of a positioning hole I 101 and a positioning hole III 201 respectively provided on the box body 1 and the box cover 2, and is axially limited by a positioning surface I 102 and a positioning surface III 202 respectively provided on the box body 1 and the box cover 2. The auxiliary worm gear 309 is placed in a positioning hole formed by a combination of a positioning hole II 103 and a positioning hole IV 203 respectively provided on the box body and the box cover, and is axially limited by a positioning surface II 104 and a positioning surface IV 204 respectively provided on the box body and the box cover.

[0040] The above-mentioned motor 301 is fixed on the box body 1, and the driving gear 3011 is fixed on the motor shaft 30101 of the motor 301 and meshes with the driven gear 304 fixed on the worm shaft 3010 for torque transmission. Wear-resistant gaskets 303, 308 and cylindrical bearings 302, 307 are respectively installed at both ends of the worm shaft 3010. The cylindrical bearings 302, 307 are fixed on the box body 1 to support and position the worm shaft 3010. A worm 306 is fixed in the middle of the worm shaft 3010, and the external thread 30601 provided on the worm 306 meshes with the external thread 30501 provided on the main worm gear 305 and the external thread 30901 provided on the auxiliary worm gear 309 respectively for torque transmission.

[0041] The link mechanism includes a link A 401, a link B 402, a positioning pin I 403, a positioning pin II 404, a link C 405, a positioning pin III 406, and a link D 407.

[0042] The outer circumferential surface of the above-mentioned connecting rod A401 is provided with an external thread 40103 having the same pitch as the internal thread 30502 of the main worm wheel 305 and meshes with it. The outer circumferential surface of the connecting rod D407 is provided with an external thread 40703 having the same pitch as the internal thread of the auxiliary worm wheel and meshes with it. The connecting rod A and the connecting rod D are respectively driven by the main worm wheel 305 and the auxiliary worm wheel 309 to realize the extension and retraction of the connecting rod A and the connecting rod D respectively.

[0043] The above-mentioned positioning pin I403 is installed in the pin holes 40102 and 40201 respectively provided at the top of the connecting rod A and one end of the connecting rod B, so that the connecting rod B can rotate around the positioning pin I403.

[0044] The above-mentioned positioning pin II404 is installed in the pin holes 40203 and 40501 respectively provided at the ends of the connecting rod B and the connecting rod C. In this way, the connecting rod B and the connecting rod C can rotate around the positioning pin II404.

[0045] The above-mentioned positioning pin III406 is installed in the pin holes 40502 and 40702 respectively provided at the tops of the connecting rod C and the connecting rod D. In this way, the connecting rod C can rotate around the positioning pin III406.

[0046] The ends of the above-mentioned positioning pin I403, positioning pin II404, and positioning pin III406 are provided with a riveting structure, so that the positioning pin and the pin hole are firmly connected to each other, and the connecting rod rotates more flexibly.

[0047] The above-mentioned connecting rod A401 and connecting rod D407 are respectively provided with limit rings 40101 and 40701 at their lower ends, which can effectively prevent the connecting rod A401 and connecting rod D407 from disengaging from the main worm wheel 305 and the auxiliary worm wheel 309 during operation.

[0048] The top surface of the above-mentioned connecting rod B is provided with an elastic connecting block 40202, and the fuel filling or charging port door 200 is adhesively fixed to the connecting block 40202, thereby ensuring the consistency between the fuel filling or charging port door and the door body provided in the vehicle body and matching the fuel filling or charging port door.

[0049] As Figure 6-9 shown, the motor output torque of the motor drive mechanism is decelerated by the first-stage gear drive of the driving gear 3011 and the driven gear 304 and the second-stage double-worm wheel (main worm wheel and auxiliary worm wheel) worm drive. The inner holes of the main worm wheel 305 and the auxiliary worm wheel 309 are respectively provided with internal threads of different pitches. The pitch P of the internal thread provided by the auxiliary worm wheel D is greater than the pitch P of the internal thread provided by the main worm wheel A, during the transmission process, the extending speed of the connecting rod D will be greater than that of the connecting rod A, causing the connecting rod B to rotate along the axis of the positioning pin Ⅰ403 while extending. The refueling or charging port door 200 fixed on the connecting rod B can then be opened upward. Conversely, when the motor 301 operates in reverse, the retracting speed of the connecting rod D will be greater than that of the connecting rod A during the transmission process, causing the connecting rod B to rotate in the opposite direction along the axis of the positioning pin Ⅰ403 while retracting, thus enabling the downward closing of the refueling or charging port door.

[0050] In the structure of this actuator, the pitch P of the connecting rod D D and the pitch P of the connecting rod A A The ratio of, the distance L between the connecting rod A and the connecting rod D AD , the length L of the connecting rod B B and the length L of the connecting rod C C Under the condition that they are relatively unchanged, if the ratio of the pitch P D to the pitch P A is increased alone, the value of L AD is decreased alone, the value of L B is decreased alone, and the value of L C is increased alone, the flipping angle of the connecting rod B moving per unit length can be increased. Therefore, the above design parameters of the actuator can be conveniently adjusted according to the installation position and space of the vehicle.

[0051] Although the above actuator can open the door upward in the above description, by adjusting the installation position of the actuator on the vehicle and also changing the installation position of the door on the connecting rod B of the actuator, it can meet the needs of different opening directions of the vehicle. The following installation methods are specifically listed.

[0052] As Figure 10 shown, after installing the refueling or charging port door connecting rod actuator on the vehicle, its connecting rod B rotates to the left, and the door is bonded to the connecting block of the connecting rod B. Even if the shape of the vehicle door frame remains unchanged, the bonding position of the refueling or charging port door and the connecting block of the connecting rod B can still be changed and adjusted to adapt to the shape of the door frame, so that the refueling or charging port door 200 changes to open to the left to meet the installation requirements of this type of vehicle.

[0053] As Figure 11 shown, after installing the refueling or charging port door connecting rod actuator on the vehicle, its connecting rod B rotates to the right, and the door is bonded to the connecting block of the connecting rod B. Even if the shape of the vehicle door frame remains unchanged, the bonding position of the refueling or charging port door and the connecting block of the connecting rod B can still be changed and adjusted to adapt to the shape of the door frame, so that the refueling or charging port door 200 changes to open to the right to meet the installation requirements of this type of vehicle.

[0054] Embodiment 2

[0055] As Figure 12Embodiment 2 shown in the figure. The difference between the link actuator for the fuel filling or charging port door of Embodiment 2 and that of Embodiment 1 lies in that: the link C405 and the positioning pin III 406 in Embodiment 1 are cancelled, the link B402 is replaced with a link B502, the pin hole 50201 (40201) for fixing the positioning pin I 403 in the link B502 remains unchanged, and a moving slot 50203 is provided at the position for fixing the positioning pin II 404. The moving slot 50203 is specifically an oval slot, and the rest remains unchanged. In this way, the link mechanism becomes: the top of the link A401 is rotatably connected to one end of the link B502 through the positioning pin I 403, the top of the link D is rotatably connected to the positioning pin II 404 and the positioning pin II 404 can move in the moving slot of the link B.

[0056] The connection block provided on the top surface of the above link B can be replaced with a new connection block 50202, or the original connection block 40202 can still be used, and the door can be fixed through the connection block.

[0057] When the above fuel filling or charging port door link actuator is in operation, its link A is lifted and lowered by the motor drive mechanism, and the link D is lifted and lowered by the motor drive mechanism. Among them, the lifting speed of the link D is greater than that of the link A, and it moves through the positioning pin II 404 in the moving slot 50203, so that the link B rotates around the top of the link A during the lifting and lowering process, so that the fuel filling or charging port door is opened or closed due to rotation during the lifting and lowering process.

[0058] It should be noted that the orientation words such as left, right, bottom, top, etc. indicating directions and the words containing these orientation words in this embodiment and this application document are only for convenience of description and are based on the specific orientation determined in the drawings, and will change accordingly with the change of the drawing direction. Therefore, these orientation words and the words containing these orientation words do not constitute a limitation on the content and protection scope of the present invention.

Claims

1. A link actuator for an automotive fuel filler or charging port door, characterized in that: It includes a first driving mechanism, a second driving mechanism and a linkage mechanism. The linkage mechanism includes Link A, Link B for fixing the fuel filling or charging port door, Link C and Link D. The top of Link A is rotatably connected to one end of Link B. The top of Link D is rotatably connected to one end of Link C. The other end of Link B is rotatably connected to the other end of Link C. Link A is lifted and lowered by the first driving mechanism, and Link D is lifted and lowered by the second driving mechanism. Among them, the lifting speed of Link D is greater than that of Link A. Through Link C, Link B rotates around the top of Link A during the lifting process, so that the fuel filling or charging port door is opened or closed due to rotation during the lifting process. The first driving mechanism includes a main worm gear, an external thread provided on the outer cylindrical surface of Link A, a main worm, and a first driver. The main worm gear is provided with an internal thread. The external thread of Link A has the same pitch as the internal thread of the main worm gear and meshes with it. The main worm gear of the first driving mechanism is driven by the main worm, and the main worm is driven by the first driver. In this way, Link A can be lifted and lowered by the rotation of the main worm gear. The second driving mechanism includes an auxiliary worm gear, an external thread provided on the outer cylindrical surface of Link D, an auxiliary worm, and a second driver. The auxiliary worm gear is provided with an internal thread. The external thread of Link D has the same pitch as the internal thread of the auxiliary worm gear and meshes with it. The auxiliary worm gear of the second driving mechanism is driven by the auxiliary worm, and the auxiliary worm is driven by the second driver. In this way, Link D can be lifted and lowered by the rotation of the auxiliary worm gear. Moreover, the pitch of the internal thread of the auxiliary worm gear is greater than that of the internal thread of the main worm gear. In this way, during the transmission process, the lifting speed of Link D is greater than that of Link A, and Link B rotates around the top of Link A during the lifting process, so that the door body fixed on Link B rotates and opens or closes during the lifting process. A connecting block is provided on the end face of Link B, and the fuel filling or charging port door is adhesively fixed to the connecting block.

2. The link actuator for an automotive fueling or charging port door according to claim 1, wherein: The main worm and the auxiliary worm are the same worm, and the first driver and the second driver are the same driver. The same driver drives the same worm, and the main worm gear and the auxiliary worm gear are driven by the same worm.

3. The link actuator for an automobile fuel filling or charging port door according to claim 2, characterized in that: The driver is a motor.

4. The link actuator for an automobile fuel filling or charging port door according to claim 1 or 2, characterized in that: It further includes an installation box. The driving mechanism is placed in the installation box, and Link A and Link D are placed in the installation box. The tops of Link A and Link D extend out of the installation box.

5. The link actuator for an automobile fuel filling or charging port door according to claim 4, characterized in that: The installation box includes a box body and a box cover. The driving mechanism is placed in the box body, the box cover is fixed on the box body, and the tops of Link A and Link D extend out of the box cover.

6. The link actuator for an automobile fuel filling or charging port door according to claim 1 or 2, characterized in that: Link A and Link B, Link B and Link C, and Link C and Link D are all connected by positioning pins to be rotatably connected to each other, or Link A and Link B, and Link B and Link D are all connected by positioning pins to be rotatably connected to each other, and the end of the positioning pin is adopted with a riveting structure.

7. The link actuator for an automobile fuel filling or charging port door according to claim 1 or 2, characterized in that: The main worm gear is placed in the positioning hole Ⅰ of the box body and the positioning hole Ⅲ of the box cover, and is axially limited by the positioning surface Ⅰ of the box body and the positioning surface Ⅲ of the box cover respectively. The auxiliary worm gear is placed in the positioning hole Ⅱ of the box body and the positioning hole Ⅳ of the box cover, and is axially limited by the positioning surface Ⅱ of the box body and the positioning surface Ⅳ of the box cover respectively.

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