A gapless ball joint drive mechanism for automobile side door opening and vehicle

Abstract

This utility model relates to the field of electric vehicle door technology, specifically to a clearance-eliminating ball joint drive mechanism for automotive side-opening doors and a vehicle. Through the rational structural design of the drive assembly, gearbox assembly, door mounting assembly, lead screw assembly, and push rod assembly, its overall structure is compact, easy to assemble and disassemble, effectively eliminating the gap between the ball head of the lead screw nut and the ball socket of the push rod assembly, and providing a certain degree of damping. This significantly improves the stability of the automotive side-opening process and enhances the user experience. The ball socket of this utility model is made of elastic material, possessing elastic contraction and expansion functions. Furthermore, a compression elastic element is provided between the ball socket and the bottom end cap of the ball socket cover, which can compress the ball head and the ball socket, causing the ball socket opening to contract and eliminate the gap between the ball head and the ball socket, thereby preventing shaking during door opening and closing. Its application prospects are broad and it is easy to promote.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle door technology, specifically to a car side-opening door drive mechanism and vehicle with a gapless ball joint. Background Technology

[0002] Currently, the mainstream electric side door actuators on the market fall into two categories: lead screw type and push rod type. In the lead screw type, one end of the lead screw assembly is fixed to the vehicle body, and the transmission component containing the lead screw nut is fixed to the door. Driving the lead screw nut achieves helical transmission, causing the lead screw assembly to move laterally and thus opening and closing the door. In the push rod type, one end of the push rod is fixed to the vehicle body, and the other end is hinged to the lead screw nut. The lead screw is rotatably arranged within the mechanism housing. Driving the lead screw achieves helical transmission, causing the lead screw nut and the hinged push rod to move laterally and thus opening and closing the door. Because the drive motor and transmission components such as the lead screw assembly and push rod assembly can be arranged in parallel in the push rod type, the overall thickness of the mechanism is smaller (generally within 40mm), making it an important implementation solution for electric side door actuators.

[0003] In existing push-rod type electric side door actuators, the connection between the push rod assembly and the lead screw nut typically employs a joint structure to accommodate the amount of swing of the push rod during door opening and closing. Currently, there are two connection methods: spherical bearing and ball joint. The spherical bearing connection involves mounting a spherical bearing on the push rod assembly and connecting it to the lead screw nut via a stepped pin. The relative swing angle between the inner and outer rings of the spherical bearing achieves the relative swing between the push rod assembly and the lead screw nut. The ball joint connection involves either a ball head on the lead screw nut or a ball head on the push rod assembly, with a corresponding ball joint seat on either the push rod assembly or the lead screw nut. The relative swing between the push rod assembly and the lead screw nut is achieved through the snap-fit ​​connection of the ball joint.

[0004] However, the joint connection between the existing push rod assembly and the lead screw nut cannot effectively eliminate the gap between the ball head and the ball socket. After installation, the push rod will wobble, affecting the play performance after the door is suspended. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a car side door drive mechanism with a gap-free ball joint. Its overall structure is compact, easy to assemble and disassemble, can effectively eliminate the gap between the ball head of the lead screw nut and the ball socket of the push rod assembly, and provide a certain amount of damping to ensure the stability of the car side door opening process and improve the user experience.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] A clearance-free ball joint drive mechanism for a car side door includes: a drive assembly 100, a gearbox assembly 200, a door mounting assembly 300, a lead screw assembly 400, and a push rod assembly 500.

[0008] The door mounting assembly 300 includes a guide housing 320. The guide housing 320 has a door connecting component and a gearbox connecting component at both ends. The door connecting component is fixedly connected to the car door by a door mounting bolt 310. The gearbox connecting component is fixedly connected to the gearbox housing 220 of the gearbox assembly 200 by a connecting bolt. The gearbox housing 220 contains a transmission gear set.

[0009] The lead screw 410 of the lead screw assembly 400 is axially rotatably installed inside the guide housing 320, and the lead screw 410 is axially limited. A lead screw nut 420 is threaded on the lead screw 410. The two sides of the lead screw nut 420 are in contact with the inner wall of the guide housing 320 through elastic friction blocks 430. A ball head 421 is fixedly connected to the bottom of the lead screw nut 420. The ball head 421 is hinged to the ball socket 511 of the push rod assembly 500. The ball socket 511 is made of elastic material and is embedded in the ball socket cover 512 at one end of the push rod 510. The other end of the push rod 510 is hinged to the car body through the vehicle body mounting bracket 520.

[0010] The drive assembly 100 includes a drive motor 110, the drive shaft 120 of the drive motor 110 is connected to the input end of the transmission gear set, and the output end of the transmission gear set is connected to one end of the lead screw 410.

[0011] Preferably, the drive motor 110 drives the lead screw 410 to rotate via the drive shaft 120 and the transmission gear set, thereby causing the lead screw nut 420 to move axially back and forth within the guide housing 320. The ball head 421 and the ball socket 511 cooperate to push the push rod 510 to extend and retract relative to the guide housing 320, thereby realizing the opening and closing of the car door.

[0012] Preferably, the ball head 421 is made of metal, the lead screw nut 420 is a metal-coated plastic part, and the outer ring of the lead screw nut 420 is covered with a plastic coating layer 422. Elastic friction blocks 430 are provided on both sides of the lead screw nut 420 to contact the inner wall of the guide housing 320 to achieve stable support and provide guidance.

[0013] Preferably, the elastic friction block 430 is installed in the mounting groove 423 opened on both sides of the lead screw nut 420, and the elastic friction block 430 is composed of an outer friction plate 432 and an internally embedded elastic block 431.

[0014] Preferably, the bottom of the ball socket cover 512 is provided with a limiting end cap 514, and an elastic element 513 is provided between the bottom of the ball socket 511 and the limiting end cap 514.

[0015] Preferably, the elastic element 513 is a compression spring.

[0016] Preferably, the transmission gear set includes a first transmission gear 211, a second transmission gear 212, a third transmission gear 213 and a fourth transmission gear 214 disposed in the gearbox housing 220 and meshing with each other in sequence.

[0017] Preferably, the input end of the first transmission gear 211 is connected to the drive shaft 120 of the drive motor 110, and the output end of the fourth transmission gear 214 is connected to one end of the lead screw 410.

[0018] Compared with the prior art, the present invention has the following main advantages:

[0019] 1. The automotive side-opening door drive mechanism of this utility model, through the reasonable structural design of the drive assembly, gearbox assembly, door mounting assembly, lead screw assembly and push rod assembly, has a compact overall structure that is easy to assemble and disassemble. It can effectively eliminate the gap between the ball head of the lead screw nut and the ball socket of the push rod assembly, and provide a certain amount of damping, which can greatly improve the stability of the automotive side-opening process and enhance the user experience.

[0020] 2. In this utility model, one end of the push rod assembly with ball socket is fixed to the vehicle body, and the other end is hinged to the lead screw nut with ball head. By driving the screw spiral movement in the drive mechanism housing, the lead screw nut can move laterally in the lead screw axis, thereby driving the push rod to extend and retract to realize the smooth opening and closing function of the car door.

[0021] 3. The ball socket of this utility model is made of elastic material, which has elastic contraction and expansion functions. A compression elastic element is provided between the ball socket and the bottom end cap of the ball socket cover, which can press the ball head and the ball socket tightly, so that the ball socket opening contracts and eliminates the gap between the ball head and the ball socket, thereby avoiding shaking when the car door is opened and closed. Its application prospects are broad and it is easy to promote. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the external structure of the automobile side door drive mechanism in an embodiment of this utility model;

[0023] Figure 2 for Figure 1 A cross-sectional view along the AA direction;

[0024] Figure 3 This is a schematic diagram of the ball joint of the automobile side door drive mechanism in an embodiment of this utility model;

[0025] Figure 4This is a cross-sectional view of the ball joint of the automobile side door drive mechanism in an embodiment of this utility model;

[0026] Figure 5 This is a schematic diagram of the transmission gear set inside the gearbox assembly in an embodiment of this utility model.

[0027] In the diagram: 100-Drive assembly, 200-Gearbox assembly, 300-Door mounting assembly, 400-Lead screw assembly, 500-Push rod assembly; 110-Drive motor, 120-Motor drive shaft; 211-First transmission gear, 212-Second transmission gear, 213-Third transmission gear, 214-Fourth transmission gear, 220-Gearbox housing; 310-Door mounting bolt, 320-Guide housing; 410-Lead screw, 420-Lead screw nut, 421-Ball head, 422-Plastic covering layer, 423-Mounting groove, 430-Elastic friction block, 431-Elastic block, 432-Friction pad; 510-Push rod, 511-Ball socket, 512-Ball socket cover, 513-Elastic element, 514-Limit end cap, 520-Body mounting bracket. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0030] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0031] In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0032] The features and performance of this application will be further described in detail below with reference to the embodiments.

[0033] Example 1: This example provides a gapless ball joint-type automotive side door drive mechanism, such as... Figures 1-5 As shown, it mainly includes: drive assembly 100, gearbox assembly 200, door mounting assembly 300, lead screw assembly 400 and push rod assembly 500;

[0034] The door mounting assembly 300 includes a guide housing 320. The guide housing 320 has a door connecting component and a gearbox connecting component at both ends. The door connecting component is fixedly connected to the car door by a door mounting bolt 310. The gearbox connecting component is fixedly connected to the gearbox housing 220 of the gearbox assembly 200 by a connecting bolt. The gearbox housing 220 contains a transmission gear set.

[0035] The lead screw 410 of the lead screw assembly 400 is axially rotatably installed inside the guide housing 320, and the lead screw 410 is axially limited. A lead screw nut 420 is threaded on the lead screw 410. The two sides of the lead screw nut 420 are in contact with the inner wall of the guide housing 320 through elastic friction blocks 430. A ball head 421 is fixedly connected to the bottom of the lead screw nut 420. The ball head 421 is hinged to the ball socket 511 of the push rod assembly 500. The ball socket 511 is made of elastic material and is embedded in the ball socket cover 512 at one end of the push rod 510. The other end of the push rod 510 is hinged to the car body through the vehicle body mounting bracket 520.

[0036] The drive assembly 100 includes a drive motor 110, the drive shaft 120 of the drive motor 110 is connected to the input end of the transmission gear set, and the output end of the transmission gear set is connected to one end of the lead screw 410.

[0037] Furthermore, the drive motor 110 drives the lead screw 410 to rotate via the drive shaft 120 and the transmission gear set, thereby causing the lead screw nut 420 to move axially back and forth within the guide housing 320. The ball head 421 and the ball socket 511 cooperate to push the push rod 510 to extend and retract relative to the guide housing 320, thereby realizing the opening and closing of the car door.

[0038] Furthermore, the ball head 421 is made of metal, the lead screw nut 420 is a metal-coated plastic part, and the outer ring of the lead screw nut 420 is covered with a plastic coating layer 422. Elastic friction blocks 430 can be provided on both sides of the lead screw nut 420 to contact the inner wall of the guide housing 320 to achieve stable support and provide guidance.

[0039] Furthermore, the elastic friction block 430 is installed in the mounting groove 423 opened on both sides of the lead screw nut 420, and the elastic friction block 430 is composed of an outer friction plate 432 and an internally embedded elastic block 431.

[0040] Furthermore, the bottom of the ball socket cover 512 is provided with a limiting end cap 514, and an elastic element 513 is provided between the bottom of the ball socket 511 and the limiting end cap 514.

[0041] Furthermore, the elastic element 513 is specifically a compression spring.

[0042] Furthermore, the transmission gear set includes a first transmission gear 211, a second transmission gear 212, a third transmission gear 213, and a fourth transmission gear 214 disposed within the gearbox housing 220 and meshing sequentially.

[0043] Furthermore, the input end of the first transmission gear 211 is connected to the drive shaft 120 of the drive motor 110, and the output end of the fourth transmission gear 214 is connected to one end of the lead screw 410.

[0044] Example 2: This example provides a gapless ball joint automotive side door drive mechanism. One end of the push rod assembly with ball socket is fixed to the vehicle body, and the other end is hinged to the lead screw nut with ball head. By driving the lead screw, which is supported by the rotation of both ends in the mechanism housing, the lead screw nut can move laterally in the lead screw axis, thereby driving the push rod to extend and retract to realize the opening and closing function of the car door.

[0045] Furthermore, the push rod and the lead screw nut are connected by a ball head and a flexible ball socket. Compared with the existing joint bearing and ball joint structure connection, this structure can not only prevent detachment and is easy to assemble and disassemble, but also completely eliminate the gap between the ball head and the ball socket, and can provide a certain degree of damping.

[0046] In embodiment three, based on the same inventive concept, this embodiment also provides a manual-automatic vehicle, which is equipped with the car side door drive mechanism described above.

[0047] Furthermore, all parts of this application that are not described in detail are the same as or implemented using existing technology.

[0048] In summary:

[0049] 1. The automotive side-opening door drive mechanism of this utility model, through the reasonable structural design of the drive assembly, gearbox assembly, door mounting assembly, lead screw assembly and push rod assembly, has a compact overall structure that is easy to assemble and disassemble. It can effectively eliminate the gap between the ball head of the lead screw nut and the ball socket of the push rod assembly, and provide a certain amount of damping, which can greatly improve the stability of the automotive side-opening process and enhance the user experience.

[0050] 2. In this utility model, one end of the push rod assembly with ball socket is fixed to the vehicle body, and the other end is hinged to the lead screw nut with ball head. By driving the screw spiral movement in the drive mechanism housing, the lead screw nut can move laterally in the lead screw axis, thereby driving the push rod to extend and retract to realize the smooth opening and closing function of the car door.

[0051] 3. The ball socket of this utility model is made of elastic material, which has elastic contraction and expansion functions. A compression elastic element is provided between the ball socket and the bottom end cap of the ball socket cover, which can press the ball head and the ball socket tightly, so that the ball socket opening contracts and eliminates the gap between the ball head and the ball socket, thereby avoiding shaking when the car door is opened and closed. Its application prospects are broad and it is easy to promote.

[0052] The above embodiments are only used to illustrate the design concept and features of this utility model, and their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. The protection scope of this utility model is not limited to the above embodiments. Therefore, all equivalent changes or modifications made based on the principles and design ideas disclosed in this utility model are within the protection scope of this utility model.

Claims

1. A clearance-free ball joint drive mechanism for a car side door, characterized in that, The system includes a drive assembly (100), a gearbox assembly (200), a door mounting assembly (300), a lead screw assembly (400), and a push rod assembly (500). The door mounting assembly (300) includes a guide housing (320), with a door connecting component and a gearbox connecting component at each end. The door connecting component is fixedly connected to the car door by a door mounting bolt (310), and the gearbox connecting component is fixedly connected to the gearbox housing (220) of the gearbox assembly (200) by a connecting bolt. The gearbox housing (220) contains a transmission gear set. The guide housing (320) contains the lead screw (410) of the lead screw assembly (400) which is axially rotatably mounted and axially limits the lead screw (410). The lead screw (410) is threaded with a lead screw nut (420). The lead screw nut (420) has elastic friction blocks (430) on both sides that contact the inner wall of the guide housing (320). The bottom of the lead screw nut (420) is fixedly connected to a ball head (421). The ball head (421) is hinged to the ball socket (511) of the push rod assembly (500). The ball socket (511) is made of elastic material and is embedded in the ball socket cover (512) at one end of the push rod (510). The other end of the push rod (510) is hinged to the car body through the vehicle body mounting bracket (520). The drive assembly (100) includes a drive motor (110), the drive shaft (120) of the drive motor (110) is connected to the input end of the transmission gear set, and the output end of the transmission gear set is connected to one end of the lead screw (410).

2. The automobile side door drive mechanism with a gapless ball joint according to claim 1, characterized in that, The drive motor (110) drives the lead screw (410) to rotate through the drive shaft (120) and the transmission gear set, so as to drive the lead screw nut (420) to move back and forth axially in the guide housing (320), and push the push rod (510) to move telescopically relative to the guide housing (320) through the cooperation of the ball head (421) and the ball socket (511), so as to realize the opening and closing of the car door.

3. The automobile side door drive mechanism with a gapless ball joint according to claim 1, characterized in that, The ball head (421) is made of metal, the lead screw nut (420) is a metal-coated plastic part, and the outer ring of the lead screw nut (420) is covered with a plastic coating layer (422).

4. The automobile side door drive mechanism with a gapless ball joint according to claim 1, characterized in that, The elastic friction block (430) is installed in the mounting groove (423) opened on both sides of the lead screw nut (420), and the elastic friction block (430) is composed of an outer friction plate (432) and an internally embedded elastic block (431).

5. The automobile side door drive mechanism with a gapless ball joint according to claim 1, characterized in that, The ball socket cover (512) is provided with a limiting end cap (514) at the bottom, and an elastic element (513) is provided between the bottom of the ball socket (511) and the limiting end cap (514).

6. The automobile side door drive mechanism with a gapless ball joint according to claim 5, characterized in that, The elastic element (513) is specifically a compression spring.

7. The automotive side door drive mechanism with a gapless ball joint according to claim 1, characterized in that, The transmission gear set includes a first transmission gear (211), a second transmission gear (212), a third transmission gear (213), and a fourth transmission gear (214) disposed in the gearbox housing (220) and meshing in sequence.

8. The automobile side door drive mechanism with a gapless ball joint according to claim 7, characterized in that, The input end of the first transmission gear (211) is connected to the drive shaft (120) of the drive motor (110), and the output end of the fourth transmission gear (214) is connected to one end of the lead screw (410).

9. A vehicle with both manual and automatic transmissions, characterized in that: Includes the vehicle side door drive mechanism as described in any one of claims 1 to 8.

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