Electric opening and closing actuator for vehicle exterior storage door

Abstract

The utility model discloses a kind of vehicle external storage door electric opening and closing actuators, it is related to vehicle external storage door opening and closing technical field.The actuator includes: driving motor, fixedly connected to vehicle body;Lead screw, one end is drivingly connected with the output shaft of driving motor, to rotate around its axis under the drive of driving motor;Lead screw nut, screw in lead screw;Push rod, one end rotatably connected to vehicle body, its other end is directly fixedly connected to the goose neck pipe of vehicle external storage door;And moving pair, connect lead screw nut and push rod;When driving motor drives lead screw to rotate, drive lead screw nut linear reciprocating movement, and then pass through moving pair driving push rod swing around its connection point with vehicle body, pass through the push and pull goose neck pipe of swing push rod, to realize the opening and closing of vehicle external storage door.In the process, lead screw nut only moves inside actuator, so that actuator has fixed envelope contour without additional reserved space, and space requirement is smaller.

Description

Technical Field

[0001] This utility model relates to the field of vehicle external storage door opening and closing technology, specifically to an electric opening and closing actuator for a vehicle external storage door. Background Technology

[0002] An electric opening and closing actuator for a vehicle's external storage door is an electric drive device that converts the rotary motion of an electric motor into the output linear reciprocating motion.

[0003] With the rapid development of the new energy vehicle industry, there is a certain surplus of power supply for automobiles, and more and more electric drive body accessories are being used to equip vehicles. To improve the convenience of opening and closing external storage doors, especially those of sedans, a trend of configuring electric opening and closing trunk systems has emerged in the market.

[0004] The use of electric opening and closing actuators for external storage doors as mechanical structures for electrically opening and closing vehicle trunks has also emerged.

[0005] Currently, the mainstream electric actuators for vehicle external storage doors on the market mainly come in four forms: L-shaped push rods, rocker arm push rods, direct push rods, and U-shaped push rods. Among them, L-shaped push rods have a larger stroke and require more space for movement; rocker arm push rods need to be developed in sync with the customer's entire vehicle, resulting in a complex structure and higher cost; direct push rods are suitable for fewer car models and have higher internal spring costs; U-shaped push rods also have a large stroke, require more space for movement, and have an additional reversing gear set compared to other actuators. These devices generally suffer from problems such as large space occupation, unstable operation, and negatively impacting the consumer experience.

[0006] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0007] Purpose of this utility model: The technical problem to be solved by this utility model is to address the shortcomings of the existing technology by providing an electric opening and closing actuator for vehicle external storage doors. The actuator has a smaller installation space, a simpler manufacturing process, a simpler structure, and a lower cost.

[0008] To solve the above-mentioned technical problems, this utility model discloses an electric opening and closing actuator for a vehicle's external storage door, comprising:

[0009] The drive motor is directly or indirectly fixedly connected to the vehicle body;

[0010] A lead screw, one end of which is connected to the output shaft of the drive motor, is used to rotate around its axis under the drive of the drive motor;

[0011] A lead screw nut, screwed onto the lead screw;

[0012] The push rod has one end rotatably connected to the vehicle body and the other end directly fixed to the gooseneck tube of the vehicle's external storage door;

[0013] And a sliding joint, connecting the lead screw nut and the push rod;

[0014] When the drive motor drives the lead screw to rotate, it causes the lead screw nut to move linearly back and forth, which in turn drives the push rod to swing around its connection point with the vehicle body through the sliding pair. The swinging push rod pushes and pulls the gooseneck tube to realize the opening and closing of the vehicle's external storage door.

[0015] When opening and closing the trunk door of a car, the lead screw nut moves only inside the actuator, and the maximum envelope profile size of the actuator remains unchanged. Only the installation space needs to be reserved by designing a fixed envelope profile, which simplifies the design of the reserved space for the actuator and improves the reliability during the movement.

[0016] Because the actuator has a fixed envelope profile, no additional space is required, meaning it occupies less installation space.

[0017] Furthermore, the lead screw nut passes through the push rod, and there are two sliding pairs, located on opposite sides of the lead screw nut along an axis perpendicular to the swing plane of the push rod.

[0018] In this embodiment, the force transmitted from the door to the actuator when closing the door is kept coaxial with the lead screw nut. This reduces the force required to manually open and close the door while ensuring smooth manual opening and closing.

[0019] In one embodiment, cylindrical shafts are respectively provided on opposite sides of the lead screw nut along the axial direction perpendicular to the swing plane of the push rod. A sliding space is formed on the push rod, allowing the lead screw nut and the push rod to move relative to each other. A groove is provided on the inner wall of the sliding space. The cylindrical shaft is embedded in the groove on the corresponding side and can slide and flip along the groove to form the sliding pair.

[0020] In another embodiment, the lead screw nut includes a spherical part, and a sliding space is formed on the push rod for relative movement between the lead screw nut and the push rod. The two inner walls of the sliding space are respectively provided with sliding grooves. The two opposite ends of the spherical part are slidably connected in the corresponding sliding grooves along the axial direction perpendicular to the swing plane of the push rod and can slide and flip along the corresponding sliding grooves to form the sliding pair.

[0021] In some embodiments, the external storage door of the vehicle is the trunk door of a car.

[0022] In some embodiments, the actuator further includes a speed reducer connected to one end of the drive motor and the lead screw.

[0023] In some embodiments, the speed reducer is disposed at the end of the lead screw.

[0024] In some embodiments, the reducer is configured such that the output shaft of the drive motor is perpendicular to the axial direction of the lead screw.

[0025] This embodiment further reduces the installation space requirement in the length direction by adjusting the position of the drive motor to be perpendicular to the lead screw axis using a reducer.

[0026] In some embodiments, the reducer includes: a reducer housing, mounted on the vehicle body and fastened to the housing of the drive motor on one side; a worm gear disposed within the reducer housing, one end of which is rotatably supported within the reducer housing by a second bearing, and the other end of which is connected to the output shaft of the drive motor; a planar thrust ball bearing, the outer ring of which is fastened to the reducer housing, and the end of the lead screw is sleeved on the inner ring of the planar thrust ball bearing; a worm gear, which is rotatably supported within the reducer housing by a first bearing and meshes with the worm gear; and a gearbox cover, fastened to the other side of the reducer housing.

[0027] In some embodiments, the actuator includes:

[0028] The third bearing has its inner ring fitted onto the end of the lead screw away from the drive motor;

[0029] The bearing housing includes a lower bearing cover and a upper bearing cover that are fitted together and fixedly connected, forming a bearing mounting cavity between them; the third bearing is installed in the bearing mounting cavity.

[0030] And a ball joint, one end of which is fixedly connected to the bearing cover and the other end of which can be connected to the vehicle body, for use to allow the end of the lead screw away from the drive motor to rotate and support itself on the vehicle body.

[0031] Beneficial effects:

[0032] 1. This utility model provides an electric opening and closing actuator for a vehicle's external storage door. It employs a drive motor to rotate a lead screw. When the drive motor rotates the lead screw, it causes the lead screw nut to move linearly and reciprocally. This, in turn, drives a push rod to swing around its connection point with the vehicle body via a movable auxiliary rod. The swinging push rod pushes and pulls the gooseneck tube, thus opening and closing the vehicle's external storage door. In opening and closing a car's trunk door, the lead screw nut only moves within the actuator, and the actuator's maximum envelope profile remains unchanged. This simplifies the design of the actuator's reserved space and improves reliability during operation, requiring only a fixed envelope profile design to accommodate the pre-existing installation space.

[0033] 2. By setting the lead screw nut to pass through the push rod, and having two sliding pairs located on opposite sides of the lead screw nut along the axis perpendicular to the swing plane of the push rod, the force transmitted from the door to the actuator when closing the door is kept coaxial with the lead screw nut. This reduces the manual opening and closing force while ensuring smooth manual opening and closing.

[0034] 3. This utility model further reduces the installation space requirement in the axial direction by adjusting the position of the drive motor to be perpendicular to the lead screw axis through a reducer. Attached Figure Description

[0035] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, and the advantages of the present invention in the above and / or other aspects will become clearer.

[0036] Figure 1 This is a schematic diagram of the electric opening and closing actuator for the vehicle's external storage door, the connection structure between the car's trunk door and the gooseneck tube, provided in the first embodiment of this utility model, in the closed state of the car's trunk door.

[0037] Figure 2 This is a schematic diagram of the electric opening and closing actuator for the vehicle's external storage door, the connection structure between the car's trunk door and the gooseneck tube, provided in the first embodiment of this utility model, in the open state of the car's trunk door.

[0038] Figure 3 for Figure 2 Front view of the electric opening and closing actuator for the external storage door of a vehicle;

[0039] Figure 4 The following is a three-dimensional schematic diagram of the assembly structure of the lead screw nut and push rod as an example.

[0040] Figure 5 A three-dimensional perspective view of the assembly structure of the lead screw nut and push rod is given as an example.

[0041] Figure 6 A three-dimensional schematic diagram of the assembly structure of the lead screw nut and push rod is given as another example.

[0042] Figure 7 For along Figure 3 A sectional view taken by line AA in the diagram;

[0043] Figure 8 for Figure 10 The exploded view of the structure of the electric opening and closing actuator for the vehicle's external storage door is shown.

[0044] Figure 9 for Figure 2 Left view of the electric opening and closing actuator for the external storage door of a vehicle;

[0045] Figure 10 For along Figure 9 The sectional view taken by the BB line.

[0046] The reference numerals in the attached drawings are as follows: 100, electric actuator for opening and closing the vehicle's external storage door; 200, gooseneck tube; 300, vehicle's external storage door; 1, gearbox cover; 2, worm gear; 3, first bearing; 4, gearbox housing; 5, push rod; 6, flat thrust ball bearing; 7, lead screw nut; 8, second bearing; 9, worm gear; 10, drive motor; 11, lead screw; 12, third bearing; 13, lower bearing cover; 14, upper bearing cover; 15, ball joint; 51, groove; 52, sliding space; 711, spherical part; 712, cylindrical part. Detailed Implementation

[0047] Example 1

[0048] In this embodiment, the external storage door 300 of the vehicle is the trunk door of the car.

[0049] Figure 1 and Figure 2 The diagrams show the electric opening and closing actuator for the vehicle's external storage door and the connection structure between the car's trunk door and the gooseneck tube, as provided in Embodiment 1 of this utility model, in the closed state and the open state of the car's trunk door. Figure 3 The front view of the electric opening and closing actuator for the vehicle external storage door provided in Embodiment 1 of this utility model is shown.

[0050] like Figure 3 As shown, the electric opening and closing actuator 100 for the vehicle external storage door provided in this embodiment includes: a drive motor 10, which is directly or indirectly fixedly connected to the vehicle body; a lead screw 11, one end of which is connected to the output shaft of the drive motor 10 for rotating around its axis under the drive of the drive motor 10; a lead screw nut 7, which is screwed onto the lead screw 11; a push rod 5, one end of which is rotatably connected to the vehicle body, and the other end of which is directly fixedly connected to the gooseneck tube 200 of the vehicle external storage door 300; and a sliding pair connecting the lead screw nut 7 and the push rod 5.

[0051] When the drive motor drives the lead screw 11 to rotate, it drives the lead screw nut 7 to move linearly back and forth, which in turn drives the push rod 5 to swing around its connection point with the vehicle body through the moving auxiliary. The swinging push rod 5 pushes and pulls the gooseneck tube 200 to realize the opening and closing of the vehicle's external storage door 300.

[0052] Combination Figure 4 and Figure 5As shown, in order to avoid the situation where the screw nut is not coaxial with the screw due to the lateral force, which would lead to an increase in the manual opening and closing force of the door or even cause self-locking and prevent the door from being opened and closed manually, in the actuator of this embodiment, the screw nut 7 passes through the push rod 5, and there are two sliding pairs, which are located on opposite sides of the screw nut 7 along the axis direction perpendicular to the swing plane of the push rod 5.

[0053] In one example of a moving pair, combined Figure 5 As shown, the lead screw nut 7 includes a spherical part 711, and a sliding space 52 is formed on the push rod 5, which allows the lead screw nut 7 and the push rod 5 to move relative to each other. The two inner walls of the sliding space 52 are respectively provided with sliding grooves 51. The two opposite ends of the spherical part 711 are slidably connected in the corresponding sliding grooves 51 along the axis direction perpendicular to the swing plane of the push rod 5, and can slide and flip along the corresponding sliding grooves 51 to form a sliding pair.

[0054] In another example of a moving pair, combined Figure 6 As shown, cylindrical portions 712 are respectively provided on opposite sides of the lead screw nut 7 along the axis direction perpendicular to the swing plane of the push rod 5. A sliding space 52 is formed on the push rod 5, which allows the lead screw nut 7 and the push rod 5 to move relative to each other. A groove 51 is provided on the inner wall of the sliding space 52. The cylindrical portions 712 are embedded in the grooves 51 on the corresponding sides and can slide and flip along the grooves 51 to form a sliding pair.

[0055] In one embodiment, the actuator further includes a reducer connected to one end of the drive motor 10 and the lead screw 11 to reduce the rotational speed of the drive motor 10 output to the lead screw 11, so as to facilitate software control of the door opening and closing speed of the electric actuator.

[0056] In one embodiment, the reducer is directly disposed at the end of the lead screw 11, which can effectively reduce the fixed stroke of the actuator and reduce the axial length of the actuator.

[0057] In one embodiment, such as Figure 7 As shown, the reducer is configured such that the output shaft of the drive motor 10 is perpendicular to the axis of the lead screw 11, thereby enabling the output of the drive motor 10 to be reversed vertically and reducing the axial length of the actuator.

[0058] In one embodiment, such as Figure 8 As shown, the reducer includes a gearbox cover 1, a worm gear 2, a first bearing 3, a reducer housing 4, a flat thrust ball bearing 6, a second bearing 8, and a worm gear 9.

[0059] like Figure 10 As shown, the reducer housing 4 is installed on the vehicle body and one side of it is fastened and fixed to the housing of the drive motor 10.

[0060] like Figure 8As shown, the worm 9 is installed inside the reducer housing 4 and one end is rotatably supported inside the reducer housing 4 by the second bearing 8, while the other end is connected to the output shaft of the drive motor 10. The second bearing 8 can effectively limit the axial movement of the output shaft of the drive motor 10 and the radial movement of the worm 9, while reducing the frictional loss of the output torque of the drive motor 10 and improving the overall stability of the transmission structure.

[0061] like Figure 10 As shown, the outer ring of the planar thrust ball bearing 6 is fastened to the reducer housing 4, and the end of the lead screw 11 is sleeved on the inner ring of the planar thrust ball bearing 6, which can reduce the frictional resistance caused by the direct contact between the lead screw 11 and the reducer housing 4.

[0062] like Figure 8 As shown, the worm gear 2 is rotatably supported in the reducer housing 4 by the first bearing 3 and meshes with the worm 9. The first bearing 3 can limit the axial movement and radial wobble of the worm gear 2 and reduce friction loss. At the same time, the meshing of the worm gear 2 with the worm 9 enables the motor output to achieve vertical reversal, reduces the axial length of the actuator, and reduces the speed of the motor output to the lead screw, so as to facilitate the software control of the door opening and closing speed of the electric actuator.

[0063] like Figure 8 As shown, the gearbox cover 1 is fastened and fixed to the other side of the gearbox housing 4 to fix the position of the internal parts.

[0064] In one embodiment, such as Figure 10 and Figure 8 As shown, the actuator includes a third bearing 12, a lower bearing cover 13, an upper bearing cover 14, and a ball joint 15. The inner ring of the third bearing 12 is fitted onto the end of the lead screw 11 away from the drive motor 10. The lower bearing cover 13 and the upper bearing cover 14 are fitted together and fixedly connected, forming a bearing mounting cavity between them. The third bearing 12 is installed in the bearing mounting cavity. One end of the ball joint 15 is fixedly connected to the upper bearing cover 14, and the other end can be connected to the vehicle body, for rotating and supporting the end of the lead screw 11 away from the drive motor 10 on the vehicle body.

[0065] In this embodiment, the third bearing 12 is fixed to the top of the lead screw 11 via a split bearing lower cover 13 and bearing upper cover 14, allowing the lead screw 11 to rotate freely in the radial direction. It should be understood that other shaft hole or bushing mating structures can also be used to achieve the same result.

[0066] Below, refer to Figure 2 The method of using the electric opening and closing actuator for the vehicle's external storage door shown in this embodiment during the opening and closing of the vehicle's external storage door 300 will be explained.

[0067] During installation, the push rod 5 of the electric opening and closing actuator of the vehicle's external storage door in this embodiment is fixedly connected to the gooseneck tube 200 on the vehicle's external storage door; the reducer housing 4 is installed on the vehicle body, so that the drive motor 10 is indirectly fixedly connected to the vehicle body.

[0068] When in use, the drive motor 10 is energized, which drives the worm gear 9 to output torque and drive the worm wheel 2 to rotate; the rotation of the worm wheel 2 drives the lead screw 11 to rotate, and the rotation of the lead screw 11 causes the lead screw nut 7 on it to move linearly; the spherical part 711 on the lead screw nut 7 rolls in the groove 51 of the push rod 5, and at the same time pushes the push rod 5 to move; the movement of the push rod 5 causes the gooseneck tube 200, which is hinged to the external storage door 300 of the vehicle, to move synchronously, realizing the electric opening and closing of the car trunk door.

[0069] Example 2

[0070] Unlike Embodiment 1, in this embodiment, the push rod 5 is connected to one side of the lead screw nut 7 via a sliding joint.

[0071] Because this embodiment is a single-sided connection, when closing the door, there is a situation where the force transmitted from the door to the actuator is not coaxial with the lead screw nut 7. This will increase the force required to manually open and close the door, and in severe cases, it may even cause self-locking, making it impossible to manually open and close the door.

[0072] The reducers in the above embodiments use a worm gear transmission method, but can also be replaced with other methods such as gear transmission.

[0073] This utility model provides a concept and method for an electric opening and closing actuator for a vehicle's external storage door. Many methods and approaches exist for implementing this technical solution; the above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. All components not explicitly stated in this embodiment can be implemented using existing technology.

Claims

1. An electric opening and closing actuator for a vehicle's external storage door, characterized in that, include: The drive motor (10) is directly or indirectly fixedly connected to the vehicle body; A lead screw (11), one end of which is connected to the output shaft of the drive motor (10) for rotating around its axis under the drive of the drive motor (10); A lead screw nut (7) is screwed onto the lead screw (11). Push rod (5), one end of which is rotatably connected to the vehicle body, and the other end of which is directly fixed to the gooseneck tube (200) of the vehicle's external storage door (300). And a sliding pair, connecting the lead screw nut (7) and the push rod (5); When the drive motor drives the lead screw (11) to rotate, it drives the lead screw nut (7) to move linearly back and forth, and then drives the push rod (5) to swing around its connection point with the vehicle body through the moving pair. The swinging push rod (5) pushes and pulls the gooseneck tube (200) to realize the opening and closing of the vehicle's external storage door (300).

2. The electric opening and closing actuator for a vehicle external storage door according to claim 1, characterized in that, The lead screw nut (7) passes through the push rod (5), and there are two sliding pairs, located on opposite sides of the lead screw nut (7) along the axis direction perpendicular to the swing plane of the push rod (5).

3. The electric opening and closing actuator for a vehicle external storage door according to claim 2, characterized in that, The lead screw nut (7) has cylindrical portions (712) on opposite sides along the axis direction perpendicular to the swing plane of the push rod (5). The push rod (5) has a sliding space (52) for relative movement between the lead screw nut (7) and the push rod (5). The inner wall of the sliding space (52) is provided with a groove (51). The cylindrical portion (712) is embedded in the groove (51) on the corresponding side and can slide and flip along the groove (51) to form the sliding pair.

4. The electric opening and closing actuator for a vehicle external storage door according to claim 2, characterized in that, The lead screw nut (7) includes a spherical part (711), and a sliding space (52) is formed on the push rod (5) for relative movement between the lead screw nut (7) and the push rod (5). The two inner walls of the sliding space (52) are respectively provided with grooves (51). The two ends of the spherical part (711) along the axis direction perpendicular to the swing plane of the push rod (5) are respectively slidably connected in the grooves (51) on the corresponding sides and can slide and flip along the grooves (51) on the corresponding sides to form the sliding pair.

5. The electric opening and closing actuator for a vehicle external storage door according to claim 2, characterized in that, The external storage door (300) of the vehicle is the trunk door of the car.

6. The electric opening and closing actuator for a vehicle external storage door according to claim 1, characterized in that, It also includes a speed reducer, which connects the drive motor (10) to one end of the lead screw (11).

7. The electric opening and closing actuator for a vehicle external storage door according to claim 6, characterized in that, The speed reducer is located at the end of the lead screw (11).

8. The electric opening and closing actuator for a vehicle external storage door according to claim 7, characterized in that, The reducer is configured such that the output shaft of the drive motor (10) is perpendicular to the axial direction of the lead screw (11).

9. The electric opening and closing actuator for a vehicle external storage door according to claim 7, characterized in that, The speed reducer includes: The reducer housing (4) is installed on the vehicle body and one side of it is fastened and fixed to the housing of the drive motor (10); The worm (9) is disposed inside the reducer housing (4) and one end is rotatably supported inside the reducer housing (4) by the second bearing (8), and the other end is connected to the output shaft of the drive motor (10); A planar thrust ball bearing (6) has its outer ring fastened to the reducer housing (4), and the end of the lead screw (11) is sleeved on the inner ring of the planar thrust ball bearing (6). The worm gear (2) is rotatably supported in the reducer housing (4) by the first bearing (3) and meshes with the worm (9); And the gearbox cover (1) is fastened and fixed to the other side of the gearbox housing (4).

10. The electric opening and closing actuator for a vehicle external storage door according to claim 9, characterized in that, include: The third bearing (12) has its inner ring fitted onto the end of the lead screw (11) away from the drive motor (10); The bearing housing includes a lower bearing cover (13) and an upper bearing cover (14) that are mutually fitted and fixedly connected, with a bearing mounting cavity formed between them; the third bearing (12) is installed in the bearing mounting cavity; And a ball joint (15), one end of which is fixedly connected to the bearing cover (14) and the other end can be connected to the vehicle body, for the purpose of rotating the end of the lead screw (11) away from the drive motor (10) to support the vehicle body.

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