A ball head sleeve connecting structure of an automobile electric supporting rod
Patent Information
- Application Number
- CN202521998837.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-17
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-09-17
AI Technical Summary
此种结构存在以下不足；1.连接结构中包含球头套、金属嵌件、带螺栓的伸缩杆、胶水，物料的数量多、结构复杂；2.零件的孔与轴有螺纹特征需要加工、还需要一体成型工艺、制造加工零件复杂；3.装配球头套与伸缩杆的过程中包含拧螺纹和涂胶工时长，4.结构经济性不足
[0009]本实用新型的优点在于：1.利用树脂成型便利的特点，将球头套和嵌件特征集成为一体，形成带凸台和沟槽特征的球头套，无需另外的嵌件，便于球头套一次注塑成型；与球头套连接的伸缩杆部位为光杆，取消了螺栓，削减了物料种类，从而简化连接结构。
Smart Images
Figure CN224835814U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive parts technology, specifically to a ball joint sleeve connection structure for an automotive electric strut. Background Technology
[0002] The current configuration of electric trunk struts in passenger cars includes a motor, spring, transmission mechanism, and connecting and fixing structures. The ball joint sleeve and telescopic rod connection structure consists of a ball joint sleeve and a metal insert integrally molded and assembled, then connected to the bolted telescopic rod via threads and glued to prevent loosening. This structure has the following drawbacks: 1. The connection structure includes a ball joint sleeve, metal insert, bolted telescopic rod, and glue, resulting in a large number of materials and a complex structure; 2. The holes and shafts of the parts have threaded features requiring machining and an integral molding process, making the manufacturing process complex; 3. The assembly process of the ball joint sleeve and telescopic rod involves time-consuming threading and gluing; 4. The structure lacks economic efficiency. Summary of the Invention
[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a ball joint sleeve connection structure for automotive electric struts. This ball joint sleeve connection structure requires fewer parts, is simple to assemble, and requires less time, thereby reducing production costs.
[0004] The purpose of this utility model is achieved by the following solution: a ball joint sleeve connection structure for an automotive electric strut, comprising a motor assembly, a guide rod, a spring seat, a spring, a telescopic rod, and a ball joint sleeve. The motor housing assembly in the motor assembly is connected and fixed to the guide rod. A guide rod is provided on the outer circumference of the telescopic rod, and a spring is provided on the outer circumference of the guide rod. The front end of the spring is connected and fixed to the spring seat, and the front end of the telescopic rod is connected and fixed to the ball joint sleeve. The spring seat is located on the outer circumference of the ball joint sleeve and the telescopic rod. The ball joint sleeve includes a ball joint recess at its front end, a limiting cylinder at its rear end, the limiting cylinder being located on the inner circumference of the small-diameter section at the front end of the spring seat, a flange at the rear end of the limiting cylinder, the flange being located on the inner circumference of the large-diameter section at the front end of the spring seat, a cylindrical boss at the rear end of the flange, and a groove on the cylindrical boss. The rear end of the ball joint sleeve is riveted and fixed to the front end of the telescopic rod through the groove.
[0005] The bottom cross-section of the trench is polygonal.
[0006] The ball head sleeve has a ball head socket, a limiting cylinder, a flange, a cylindrical boss, and a groove as an integral structure.
[0007] The ball head sleeve is made of resin material through one-time injection molding.
[0008] The flange can axially limit the spring seat, and the limiting cylinder and the spring seat can rotate circumferentially relative to each other.
[0009] The advantages of this utility model are: 1. Taking advantage of the convenient resin molding characteristics, the ball head sleeve and insert features are integrated into one piece to form a ball head sleeve with boss and groove features, without the need for additional inserts, which facilitates one-time injection molding of the ball head sleeve; the telescopic rod part connected to the ball head sleeve is a smooth rod, eliminating bolts, reducing the types of materials, and thus simplifying the connection structure.
[0010] 2. The connection method adopts a non-threaded connection, which eliminates the need for thread machining during the manufacturing and processing of the parts. The ball head sleeve in this solution is characterized by a grooved cylindrical boss, and the telescopic rod is a smooth rod, which reduces the complexity of the part features. The ball head sleeve does not need to be integrally molded with the insert, which facilitates the manufacturing of the parts.
[0011] 3. The ball joint sleeve and the telescopic rod are connected by riveting. The telescopic rod material is riveted into the groove of the cylindrical boss on the ball joint sleeve, thus axially fixing the ball joint sleeve and the telescopic rod. The polygonal feature at the bottom of the groove of the cylindrical boss on the ball joint sleeve prevents circumferential rotation of the ball joint sleeve and the telescopic rod. This connection method eliminates the need for adhesive to prevent detachment, reduces assembly time, facilitates automated assembly, and ensures connection reliability.
[0012] 4. The connection structure between the ball joint sleeve and the telescopic rod reduces the number of parts, simplifies the features of the parts, facilitates the manufacturing of the parts, and reduces assembly time through riveting, thereby reducing the manufacturing cost of the structure and improving its economic efficiency. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 A schematic diagram of the electric tailgate strut structure for a car. Figure 3 Structure diagram of electric tailgate strut / electric engine hood strut for SUV Detailed Implementation
[0014] like Figures 1 to 3As shown, a ball joint sleeve connection structure for an automotive electric strut includes a motor assembly 6, a guide rod 5, a spring seat 4, a spring 3, a telescopic rod 2, and a ball joint sleeve 1. The motor housing assembly in the motor assembly 6 is fixedly connected to the guide rod 5. The guide rod 5 is arranged on the outer circumference of the telescopic rod 2, and the spring 3 is arranged on the outer circumference of the guide rod 5. The front end of the spring 3 is fixedly connected to the spring seat 4. The front end of the telescopic rod 2 is fixedly connected to the ball joint sleeve 1. The spring seat 4 is arranged on the outer circumference of the ball joint sleeve 1 and the telescopic rod 2. The ball joint sleeve 1 includes a ball joint recess 1-1 at its front end. 1. A ball joint is connected to the vehicle body. A limiting cylinder 1-2 is provided at the rear end of the ball joint socket 1-1. The limiting cylinder 1-2 is located on the inner circumference of the small-diameter section at the front end of the spring seat 4, limiting the radial runout of the spring seat 4. A flange 1-3 is provided at the rear end of the limiting cylinder 1-2. The flange 1-3 is located on the inner circumference of the front end of the large-diameter section of the spring seat 4, preventing axial sliding of the spring seat 4. A cylindrical boss 1-4 is provided at the rear end of the flange 1-3. A groove 1-5 is provided on the cylindrical boss 1-4. The bottom cross-section of the groove 1-5 is polygonal to prevent circumferential rotation of the telescopic rod 2 after riveting with the ball joint sleeve 1. The rear end of the ball joint sleeve 1 is riveted and fixed to the front end of the telescopic rod 2 through the groove 1-5. The front end of the telescopic rod 2 is a smooth rod, eliminating the need for thread machining during part manufacturing and reducing the complexity of the part features. The flange 1-3 can axially limit the spring seat 4, while the limiting cylinder 1-2 and the spring seat 4 can rotate circumferentially relative to each other. The ball joint sleeve 1 is injection molded from resin material in one piece. The ball joint recess 1-1, limiting cylinder 1-2, flange 1-3, and cylindrical boss 1-4 of the ball joint sleeve 1 are integrated into a single structure. The ball joint sleeve 1 is integrated with the insert, eliminating the need for additional inserts and facilitating one-time injection molding. This ball joint sleeve connection structure can be used for electric struts in scenarios such as car tailgates, SUV tailgates, and car engine hoods.
[0015] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications made to the present utility model by those skilled in the art without departing from the spirit of the present utility model shall fall within the protection scope of the present utility model.
Claims
1. A ball joint sleeve connection structure for an electric strut for automobiles, comprising a motor assembly (6), a guide rod (5), a spring seat (4), a spring (3), a telescopic rod (2), and a ball joint sleeve (1), wherein the motor housing assembly in the motor assembly (6) is connected and fixed to the guide rod (5), the guide rod (5) is provided on the outer circumference of the telescopic rod (2), the spring (3) is provided on the outer circumference of the guide rod (5), the front end of the spring (3) is connected and fixed to the spring seat (4), the front end of the telescopic rod (2) is connected and fixed to the ball joint sleeve (1), and the spring seat (4) is provided on the outer circumference of the ball joint sleeve (1) and the telescopic rod (2), characterized in that: The ball head sleeve (1) includes a ball head socket (1-1) at the front end, a limiting cylinder (1-2) at the rear end of the ball head socket (1-1), the limiting cylinder (1-2) is located on the inner circumference of the small diameter section at the front end of the spring seat (4), a flange (1-3) is located at the rear end of the limiting cylinder (1-2), the flange (1-3) is located on the inner circumference of the large diameter section at the front end of the spring seat (4), a cylindrical boss (1-4) is located at the rear end of the flange (1-3), a groove (1-5) is located on the cylindrical boss (1-4), and the rear end of the ball head sleeve (1) is riveted and fixed to the front end of the telescopic rod (2) through the groove (1-5).
2. The ball joint sleeve connection structure of the automotive electric strut according to claim 1, characterized in that: The bottom cross-section of the trench (1-5) is polygonal.
3. The ball joint sleeve connection structure of the automotive electric strut according to claim 1, characterized in that: The ball head sleeve (1) has a ball head socket (1-1), a limiting cylinder (1-2), a flange (1-3), a cylindrical boss (1-4), and a groove (1-5) as an integral structure.
4. The ball joint sleeve connection structure of the automotive electric strut according to claim 1, characterized in that: The ball head sleeve (1) is made of resin material by one-time injection molding.
5. The ball joint sleeve connection structure of the automotive electric strut according to claim 1, characterized in that: The flange (1-3) can axially limit the spring seat (4), and the limiting cylinder (1-2) and the spring seat (4) can rotate relative to each other in the circumferential direction.