Automobile side door double-screw driving mechanism and automobile

Abstract

The invention relates to the technical field of vehicle electric doors, in particular to an automobile side door double-lead-screw driving mechanism and a vehicle. According to the automobile side opening door driving mechanism, the double-screw-rod driving design is adopted, the output gears in the gear box are radially arranged along the axial circumference of the input gear, the screw rods are synchronously driven to do spiral motion, compared with a single-screw-rod driving scheme, the two screw rod nuts are fixedly connected or are an integrated part, the guidance quality of the screw rod nuts is better, and the service life of the screw rod nuts is prolonged. The working stability and smoothness of the driving mechanism can be greatly improved, and the size and manufacturing precision requirements of the lead screw mechanism can be reduced; the driving force of the motor is converted to the double-end gears to be output after passing through the input gears in the gear box, the gear box can provide the reduction ratio and can achieve same-direction and same-speed output of the two output end gears, then synchronous driving of the double-lead-screw mechanism is achieved, the driving force of the system can be greatly improved, and the user experience is improved.

Description

Technical Field

[0001] The invention relates to the technical field of electric vehicle doors, and in particular to a double-screw driving mechanism for a vehicle side door and a vehicle. Background Art

[0002] At present, the mainstream electric side door actuators for automobiles in mass production on the market are of two types: screw type and push rod type. The screw type means that one end of the screw assembly is fixedly connected to the vehicle body, and the transmission assembly where the screw nut is located is fixedly connected to the door. The screw nut is driven to achieve spiral transmission, and the screw assembly is driven to move laterally to achieve the opening and closing of the door. The push rod type means that one end of the push rod is fixedly connected to the vehicle body, and the other end is hinged to the screw nut. The screw is rotatably arranged in the mechanism housing, and the screw is driven to achieve spiral transmission. The screw nut and the hinged push rod are driven to move laterally to achieve the opening and closing of the door. The push rod type solution drives the motor and transmission components such as the screw assembly and the push rod assembly in parallel, and the overall thickness of the mechanism will be smaller (generally within 40mm), becoming an important implementation solution for electric side door actuators.

[0003] The push rod type electric side door driving scheme of the prior art has a gearbox with only two interfaces, namely an input interface and an output interface. The input end is connected to the drive motor and the output end is connected to the lead screw mechanism. This structure can only adapt to a single lead screw mechanism. The single lead screw scheme of the prior art has a lead screw nut that will deflect during the spiral movement of the lead screw nut and the lead screw. In order to ensure the smooth sliding of the lead screw nut in the housing, it is necessary to design a guide feature on the contact surface between the single lead screw nut and the mechanism housing to solve the lead screw nut deflection problem and the sliding guide problem, but this will lead to an increase in the manufacturing accuracy requirements for the outer surface of the lead screw nut and the guide surface of the mechanism housing. At the same time, in order to meet the thrust and strength requirements of a single lead screw, the lead screw diameter will be too large and the lead screw nut size will be too large at the same time. Summary of the invention

[0004] The technical problem to be solved by the present invention is: in view of the shortcomings of the prior art, a double-screw drive mechanism for a car side door is provided, which can effectively improve the guidance and stability of the screw mechanism of the drive mechanism, reduce the size and manufacturing precision requirements of the screw mechanism, and greatly improve the system driving force, thereby improving user experience.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] 1. A double-screw drive mechanism for a side door of an automobile

[0007] The present invention provides a double-screw drive mechanism for a side door of an automobile, which mainly comprises: a drive assembly 1, a gear box 2, an actuator assembly 3, a body mounting assembly 4, a door mounting assembly 5, and a housing assembly 6, wherein the gear box 2 and the door mounting assembly 5 are respectively fixedly mounted at both ends of the housing assembly 6, and the actuator assembly 3 is arranged inside the housing assembly 6;

[0008] The driving component 1 is connected to the input end of the transmission component in the gear box 2, and the output end of the transmission component in the gear box 2 is connected to the actuator component 3. The actuator component 3 is fixedly connected with a transmission pin 41. One end of the push rod 42 of the body mounting component 4 is hinged to the transmission pin 41, and the other end is hinged to the body mounting bracket 43. The body mounting bracket 43 is fixedly installed on the car body. The door mounting component 5 is fixedly connected to the car door through the door mounting bolt 51; the electric opening and closing of the door relative to the car body is achieved by extending and retracting the driving push rod 42 relative to the shell component 6.

[0009] Furthermore, the drive assembly 1 at least includes a drive motor 11, and the transmission assembly includes an input gear 21 and two output gears. The output shaft of the drive motor 11 is connected to the input gear 21, and the two output gears are symmetrically arranged on both sides of the input gear 21 and are directly meshed with or indirectly transmitted to the input gear 21.

[0010] Furthermore, the actuator 3 includes two screw rods arranged in parallel, the two screw rods are connected to the two output gears in a one-to-one correspondence, each screw rod is sleeved with a screw nut, and the screw nuts corresponding to the two screw rods are fixedly connected.

[0011] Furthermore, the vehicle body mounting assembly 4 includes a transmission pin 41 , a push rod 42 and a vehicle body mounting bracket 43 , and the transmission pin 41 is fixedly connected between two symmetrically arranged screw nuts.

[0012] Furthermore, the output gear is rotatably mounted on a gear support part, and the gear support part is fixedly mounted in the gear box 2; the screw rod is rotatably mounted on a screw rod support part, and the screw rod support part is fixedly mounted in the housing assembly 6.

[0013] Furthermore, the two output gears specifically include an output gear 22a and an output gear 22b that are symmetrically meshed or indirectly transmitted on both sides of the input gear 21. The output gear 22a and the output gear 22b are respectively rotatably installed on a gear support part group 1 23a and a gear support part group 23b. The gear support part group 1 23a and the gear support part group 2 23b are both fixedly installed in the gear box 2.

[0014] Furthermore, the two screw rods specifically include screw rod 1 31a and screw rod 2 31b respectively connected to the output gear 1 22a and the output gear 2 22b, and the screw rod 1 31a and screw rod 2 31b are respectively sleeved with screw rod nut 1 32a and screw rod nut 2 32b, and the screw rod nut 1 32a and screw rod nut 2 32b are fixedly connected.

[0015] Furthermore, the screw rod 1 31a and the screw rod 2 31b are rotatably mounted on the screw rod support component group 1 33a and the screw rod support component group 2 33b respectively, and the screw rod support component group 1 33a and the screw rod support component group 2 33b are both fixedly mounted in the housing assembly 6.

[0016] Compared with the prior art, the present invention has the following main advantages:

[0017] 1. The automobile side door driving mechanism of the present invention adopts a double-screw drive design. The output gears in the gearbox are arranged radially along the axial circumference of the input gear, and the screw is synchronously driven to perform spiral motion. Compared with the single-screw drive solution, the two screw nuts are fixedly connected or integrated, and the guide property of the screw nut is better, which can greatly improve the stability and smoothness of the driving mechanism, and reduce the size and manufacturing precision requirements of the screw mechanism;

[0018] 2. The motor driving force of the present invention is converted to the output gears at both ends after passing through the input gear in the gear box. The gear box can not only provide a reduction ratio, but also realize the same-direction and same-speed output of the two output end gears, thereby realizing the synchronous driving of the two screw mechanisms, which can greatly improve the system driving force and enhance the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the external structure of the double-screw drive mechanism for the side door of an automobile in an embodiment of the present invention;

[0020] Figure 2 Schematic diagram of the internal structure of the double-screw drive mechanism for a side door of an automobile in an embodiment of the present invention;

[0021] Figure 3 FIG. 4 is a flow chart of a driving method in an embodiment of the present invention.

[0022] In the figure: 1-drive assembly, 11-drive motor, 2-gear box, 21-input gear, 22a-output gear one, 22b-output gear two, 23a-gear support parts group one, 23b-gear support parts group two, 3-actuator assembly, 31a-screw rod one, 31b-screw rod two, 32a-screw rod nut one, 32b-screw rod nut two, 33a-screw rod support parts group one, 33b-screw rod support parts group two, 4-body mounting assembly, 41-transmission pin, 42-push rod, 43-body mounting bracket, 5-door mounting assembly, 51-door mounting bolt, 6-housing assembly. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0025] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0026] In the description of the present application, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the products of the application are usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0027] The features and performance of the present application are further described in detail below in conjunction with the embodiments.

[0028] Embodiment 1: This embodiment provides a double-screw drive mechanism for a side door of an automobile, such as Figures 1-2 As shown, it mainly includes: a driving component 1, a gear box 2, an actuator component 3, a body mounting component 4, a door mounting component 5, and a housing component 6;

[0029] The gear box 2 and the door mounting assembly 5 are respectively fixedly mounted on both ends of the housing assembly 6, and the actuator assembly 3 is arranged inside the housing assembly 6;

[0030] The driving component 1 is connected to the input end of the transmission component in the gear box 2, and the output end of the transmission component in the gear box 2 is connected to the actuator component 3. The actuator component 3 is fixedly connected with a transmission pin 41. One end of the push rod 42 of the body mounting component 4 is hinged to the transmission pin 41, and the other end is hinged to the body mounting bracket 43. The body mounting bracket 43 is fixedly installed on the car body. The door mounting component 5 is fixedly connected to the car door through the door mounting bolt 51; the electric opening and closing of the door relative to the car body is achieved by extending and retracting the driving push rod 42 relative to the shell component 6.

[0031] Furthermore, the drive assembly 1 at least includes a drive motor 11, and the transmission assembly includes an input gear 21 and two output gears. The output shaft of the drive motor 11 is connected to the input gear 21, and the two output gears are symmetrically arranged on both sides of the input gear 21 and are directly meshed with or indirectly transmitted to the input gear 21.

[0032] Furthermore, the actuator 3 includes two screw rods arranged in parallel, the two screw rods are connected to the two output gears in a one-to-one correspondence, each screw rod is sleeved with a screw nut, and the screw nuts corresponding to the two screw rods are fixedly connected.

[0033] Furthermore, the vehicle body mounting assembly 4 includes a transmission pin 41 , a push rod 42 and a vehicle body mounting bracket 43 , and the transmission pin 41 is fixedly connected between two symmetrically arranged screw nuts.

[0034] Furthermore, the output gear is rotatably mounted on a gear support part, and the gear support part is fixedly mounted in the gear box 2; the screw rod is rotatably mounted on a screw rod support part, and the screw rod support part is fixedly mounted in the housing assembly 6.

[0035] Furthermore, the two output gears specifically include an output gear 22a and an output gear 22b that are symmetrically meshed or indirectly transmitted on both sides of the input gear 21. The output gear 22a and the output gear 22b are respectively rotatably installed on a gear support part group 1 23a and a gear support part group 23b. The gear support part group 1 23a and the gear support part group 2 23b are both fixedly installed in the gear box 2.

[0036] Furthermore, the two screw rods specifically include screw rod 1 31a and screw rod 2 31b respectively connected to the output gear 1 22a and the output gear 2 22b, and the screw rod 1 31a and screw rod 2 31b are respectively sleeved with screw rod nut 1 32a and screw rod nut 2 32b, and the screw rod nut 1 32a and screw rod nut 2 32b are fixedly connected.

[0037] Furthermore, the screw rod 1 31a and the screw rod 2 31b are rotatably mounted on the screw rod support component group 1 33a and the screw rod support component group 2 33b respectively, and the screw rod support component group 1 33a and the screw rod support component group 2 33b are both fixedly mounted in the housing assembly 6.

[0038] Embodiment 2: This embodiment provides a double-screw drive mechanism for opening a side door of a car, wherein one end of the push rod is fixedly connected to the car body, and the other end is hinged to the screw nut mechanism. By driving the screw supported at both ends and installed in the shell to spirally move, the screw nut is able to move horizontally along the axis of the screw, thereby driving the push rod to extend and retract to realize the opening and closing function of the door.

[0039] Furthermore, it includes a driving assembly, a transmission assembly, an execution assembly, a body mounting assembly, and a door mounting assembly. The body mounting bracket 43 of the body mounting assembly 4 is fixedly connected to the body, and the two door mounting bolts 51 of the door mounting assembly 5 are fixedly connected to the door.

[0040] Furthermore, the screw rod 31 of the actuator assembly is rotatably mounted in the housing 3 , the screw rod nut 32 moves along the screw rod axial direction in the housing 3 , and the actuator assembly and the push rod 42 of the vehicle body mounting assembly 4 are hinged.

[0041] Furthermore, the transmission assembly includes an input end and multiple (≥2) output ends, and the output ends are radially arranged along the axial circumference of the input end. The input end is torsionally connected to the drive assembly 1, and the output end is torsionally connected to the screw 31 of the actuator assembly, and one output end is equipped with a set of screw 31 and screw nut 32. The drive assembly 1 drives one input end to drive multiple output ends to rotate in the same direction and at the same speed.

[0042] Furthermore, the gear set of the transmission assembly is configured according to the number of output ends, and the gear set is rotatably arranged in the housing of the transmission assembly through the gear support part 23.

[0043] Furthermore, the screw nut can be installed according to a single screw configuration and then fixedly connected, or can be directly designed as an integrally formed part.

[0044] Furthermore, the screw rod 31 is rotatably arranged in the housing through a screw rod supporting part 33 .

[0045] Furthermore, the driving pin 41 of the vehicle body mounting assembly 4 is fixedly connected to a pair of screw nuts 32 , and the driving pin 41 is hinged to the push rod 42 .

[0046] Furthermore, from the perspective of compactness of the mechanism, the symmetrical arrangement of the double screws is the best practice solution.

[0047] Embodiment 3, based on the same inventive concept, this embodiment also provides a method for driving a side door of an automobile, based on the above-mentioned double-screw driving mechanism for the side door of an automobile, such as Figure 3 As shown, the specific steps include:

[0048] S1, when receiving the door opening command, the drive motor rotates forward and drives the input gear to rotate forward;

[0049] S2, the input gear drives two circumferentially arranged output gears to rotate in the same direction and at the same speed;

[0050] S3, through two output gears, drives multiple screws to rotate synchronously forward, and makes the screw nuts on the screws move synchronously along the screws to the outside of the vehicle;

[0051] S4, driving the push rod to extend outward relative to the housing through the screw nut to open the door;

[0052] S5, when receiving the door closing command, the driving motor is reversed and the input gear is driven to reverse;

[0053] S6, the input gear drives two circumferentially arranged output gears to reverse in the same direction and speed;

[0054] S7, through two output gears, drives multiple screws to reverse synchronously, and makes the screw nuts on the screws move synchronously along the screws toward the inside of the car;

[0055] S8, the push rod is driven to retract inward relative to the housing through the screw nut to close the door.

[0056] Embodiment 4: Based on the same inventive concept, this embodiment also provides a manual-automatic vehicle, which is equipped with the automobile side door double-screw drive mechanism as described above.

[0057] Furthermore, all parts involved in this application that are not described in detail are the same as the prior art or are implemented using the prior art.

[0058] In summary:

[0059] 1. The automobile side door driving mechanism of the present invention adopts a double-screw drive design. The output gears in the gearbox are arranged radially along the axial circumference of the input gear, and the screw is synchronously driven to perform spiral motion. Compared with the single-screw drive solution, the two screw nuts are fixedly connected or integrated, and the guide property of the screw nut is better, which can greatly improve the stability and smoothness of the driving mechanism, and reduce the size and manufacturing precision requirements of the screw mechanism;

[0060] 2. The motor driving force of the present invention is converted to the output gears at both ends after passing through the input gear in the gear box. The gear box can not only provide a reduction ratio, but also realize the same-direction and same-speed output of the two output end gears, thereby realizing the synchronous driving of the two screw mechanisms, which can greatly improve the system driving force and enhance the user experience.

[0061] The above embodiments are only used to illustrate the design ideas and features of the present invention, and their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. The protection scope of the present invention is not limited to the above embodiments. Therefore, any equivalent changes or modifications made based on the principles and design ideas disclosed by the present invention are within the protection scope of the present invention.

Claims

1. A double-screw drive mechanism for a side door of an automobile, characterized in that: The invention comprises a driving assembly (1), a gear box (2), an actuator assembly (3), a vehicle body mounting assembly (4), a vehicle door mounting assembly (5), and a housing assembly (6); the gear box (2) and the vehicle door mounting assembly (5) are respectively fixedly mounted at two ends of the housing assembly (6); and the actuator assembly (3) is arranged inside the housing assembly (6); The driving assembly (1) is connected to the input end of the transmission assembly in the gear box (2), and the output end of the transmission assembly in the gear box (2) is connected to the actuator assembly (3). The actuator assembly (3) is fixedly connected to a transmission pin (41). One end of a push rod (42) of the body mounting assembly (4) is hinged to the transmission pin (41), and the other end is hinged to a body mounting bracket (43). The body mounting bracket (43) is fixedly mounted on the body of the vehicle. The door mounting assembly (5) is fixedly connected to the door of the vehicle via a door mounting bolt (51). The door is electrically opened and closed relative to the body by driving the push rod (42) to extend and retract relative to the housing assembly (6).

2. The double-screw drive mechanism for a vehicle side door according to claim 1, characterized in that: The drive assembly (1) at least comprises a drive motor (11); the transmission assembly comprises an input gear (21) and two output gears; the output shaft of the drive motor (11) is connected to the input gear (21); the two output gears are symmetrically arranged on both sides of the input gear (21) and are directly meshed with or indirectly driven by the input gear (21).

3. The double-screw drive mechanism for a vehicle side door according to claim 2, characterized in that: The actuator assembly (3) comprises two screw rods arranged in parallel, the two screw rods are connected to the two output gears in a one-to-one correspondence, each screw rod is sleeved with a screw rod nut, and the screw rod nuts corresponding to the two screw rods are fixedly connected.

4. The double-screw drive mechanism for a vehicle side door according to claim 3, characterized in that: The vehicle body mounting assembly (4) comprises a transmission pin (41), a push rod (42) and a vehicle body mounting bracket (43); the transmission pin (41) is fixedly connected between two symmetrically arranged screw nuts.

5. The double-screw drive mechanism for a vehicle side door according to claim 3, characterized in that: The output gear is rotatably mounted on a gear support part, and the gear support part is fixedly mounted in the gear box (2); the screw rod is rotatably mounted on a screw rod support part, and the screw rod support part is fixedly mounted in the housing assembly (6).

6. The double-screw drive mechanism for a vehicle side door according to claim 3, characterized in that: The two output gears specifically include an output gear 1 (22a) and an output gear 2 (22b) symmetrically meshed or indirectly transmitted on both sides of the input gear (21); the output gear 1 (22a) and the output gear 2 (22b) are rotatably mounted on a gear support component group 1 (23a) and a gear support component group 2 (23b) respectively; the gear support component group 1 (23a) and the gear support component group 2 (23b) are both fixedly mounted in the gear box (2).

7. The double-screw drive mechanism for a vehicle side door according to claim 6, characterized in that: The two screw rods specifically include screw rod one (31a) and screw rod two (31b) respectively connected to the output gear one (22a) and the output gear two (22b), and screw rod nut one (32a) and screw rod nut two (32b) are respectively sleeved on the screw rod one (31a) and screw rod two (31b), and the screw rod nut one (32a) and screw rod nut two (32b) are fixedly connected.

8. The double-screw drive mechanism for a vehicle side door according to claim 7, characterized in that: The screw rod one (31a) and the screw rod two (31b) are rotatably mounted on the screw rod support component group one (33a) and the screw rod support component group two (33b), respectively, and the screw rod support component group one (33a) and the screw rod support component group two (33b) are both fixedly mounted in the housing component (6).

9. A manual-automatic vehicle, characterized in that: It comprises a double-screw drive mechanism for a side door of an automobile as claimed in any one of claims 1 to 8.

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