An electric prop rod assembly having an electric prop rod housing structure

Abstract

The utility model relates to electric support rod field, and specifically is a kind of electric support rod shell structure and the electric support rod assembly with the electric support rod shell structure of this, including shell;The shell includes shell body, and assembly inner hole is equipped in the shell body;The assembly inner hole is stepped hole;The assembly inner hole is along the midaxial line of shell body and is set through shell body;The assembly inner hole includes first inner hole, second inner hole, third inner hole, fourth inner hole and fifth inner hole;The inner diameter of first inner hole, second inner hole, third inner hole and fourth inner hole is different;The utility model is changed by being designed into stepped hole to assembly inner hole;Make the welding position of subsequent parts change in shell sleeve body, through the laser welding position of stepped distribution, avoid that part is extruded deformation in installation process, ensure the concentricity of part cooperation, improve product quality and reliability.

Description

Technical Field

[0001] This utility model relates to the field of electric struts, specifically an electric strut housing structure and an electric strut assembly having the electric strut housing structure. Background Technology

[0002] To meet people's need to open and close car doors without touching them, many remote-controlled or sensor-controlled electric door opening and closing systems have emerged on the market.

[0003] The most critical mechanical component of an electric door opening and closing system is the electric strut, which is commonly assembled using laser welding or riveting methods.

[0004] Existing riveted electric struts suffer from deformation and compression of internal parts during the riveting process, affecting the fit accuracy of internal parts after riveting. To mitigate the impact of riveting, the wall thickness of the riveted parts needs to be increased, thereby increasing costs.

[0005] Existing laser-welded assembled electric struts require a tight fit between parts, which necessitates significant installation force during assembly and may lead to deformation due to compression.

[0006] The existing patent CN218577885U - an electric strut with laser welding type waterproof sealing does not clearly disclose the technical content that solves the above-mentioned technical problems.

[0007] Therefore, in order to solve or improve at least one of the above technical problems, it is necessary to optimize the design of the existing electric strut structure. Utility Model Content

[0008] The purpose of this invention is to provide a new type of housing structure for electric struts that can reduce the deformation of parts during assembly inside the electric strut housing.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0010] An electric strut housing structure includes an outer shell; the outer shell includes an outer shell body, and the outer shell body has an assembly inner hole;

[0011] The assembly inner hole is a stepped hole;

[0012] The assembly inner hole is provided to penetrate the outer shell body along the central axis of the outer shell body;

[0013] The assembly inner hole includes a first inner hole, a second inner hole, a third inner hole, a fourth inner hole, and a fifth inner hole; the first inner hole, the second inner hole, the third inner hole, the fourth inner hole, and the fifth inner hole are connected and communicate with each other in sequence;

[0014] The inner diameters of the first inner hole, the second inner hole, the third inner hole, and the fourth inner hole are different.

[0015] The inner diameters of the first, second, third, and fourth inner holes gradually decrease; the inner diameter of the fifth inner hole is greater than that of the fourth inner hole.

[0016] The housing structure further includes a support structure disposed within the housing; the support structure includes a first support element, a second support element, and / or a third support element.

[0017] The third support element includes a third support body, and the third support body is provided with a through hole penetrating the third support body;

[0018] The through hole includes a main through hole and an assembly inner groove; the assembly inner groove is connected to the main through hole.

[0019] The inner diameter of the assembly inner groove is larger than the inner diameter of the main body through hole; the through hole is a stepped hole.

[0020] The outer side of the third support body is provided with an outer ring groove; the outer ring groove forms a stepped platform on the third support body; the length of the outer ring groove is less than the length of the third support body;

[0021] The assembly through holes and outer annular grooves are distributed at both ends of the third support body.

[0022] The assembly inner groove includes a first inner groove and a second inner groove; the first inner groove is connected to the main body through hole through the second inner groove; the inner diameter of the first inner groove is larger than the inner diameter of the second inner groove, and the inner diameter of the second inner groove is larger than the inner diameter of the main body through hole.

[0023] The main body through hole has a protruding component at one end away from the assembly inner groove; the protruding component includes multiple support protrusions that are spaced out and distributed in a ring on the inner wall of the main body through hole; the adjacent support protrusions are spaced out to form an exhaust gap.

[0024] The second support element includes a second support body, which has a second inner cavity; the first support element includes a first support body, which has a first inner cavity.

[0025] The second support element is connected to the first support element or the third support element through a limiting mechanism; the limiting mechanism includes a limiting protrusion on the second support body and a limiting groove on the first support body or the third support body; the limiting protrusion on the second support element is inserted into the limiting groove on the first support body or the third support body.

[0026] An electric strut assembly includes an electric strut housing structure; the electric strut housing structure is provided with a drive assembly and a driven assembly.

[0027] The drive assembly can drive the driven assembly to move;

[0028] The drive assembly includes a drive mechanism and a gearbox assembly; the driven assembly includes a damper assembly and a lead screw and nut assembly; the drive mechanism can drive the lead screw and nut assembly to operate through the gearbox assembly.

[0029] The electric strut housing structure has a first ball-and-socket structure at one end near the drive assembly; the lead screw and nut assembly is connected to a second housing via a second ball-and-socket structure at the end away from the drive assembly; the second housing is sleeved on the lead screw and nut assembly; a helical spring is provided between the second housing and the third support element; the helical spring is sleeved on the third support element.

[0030] In the electric strut housing structure, the first support element and the third support element are welded inside the housing body; the first ball-and-socket structure is welded to the end of the housing body.

[0031] The electric strut assembly also includes an elastic unit, which includes at least one rubber element; the first ball-and-socket structure is welded and fixed in the first inner hole of the outer shell body; the first support element is welded and fixed in the third inner hole of the outer shell body; the third support element is welded and fixed in the fourth inner hole of the outer shell body;

[0032] First, install the first support element, the second support element, the driven assembly, the third support element, and the rubber element inside the outer shell; then weld and fix the first support element and the third support element inside the outer shell.

[0033] Then, the first ball-and-socket structure, drive assembly, and rubber components are installed inside the housing body; then, the first ball-and-socket structure is inserted into the end of the housing body and welded in place.

[0034] After installing the helical spring and the second housing, the second housing is riveted to the lead screw and nut assembly via the second ball socket structure.

[0035] The advantages of this utility model are:

[0036] This utility model discloses an electric strut housing structure and an electric strut assembly having the electric strut housing structure.

[0037] This invention designs the assembly inner hole as a stepped hole, which changes the welding position of subsequent parts inside the outer casing. The stepped laser welding positions prevent the parts from being squeezed and deformed during installation, ensuring the concentricity of the parts and improving product quality and reliability.

[0038] This invention designs the assembly inner hole as a stepped hole with a through-hole structure, theoretically eliminating the need for additional protrusions.

[0039] Meanwhile, the third support element disclosed in this utility model, based on its special structural limitations, integrates multiple support structures and is laser-welded to the outer shell body. This design reduces the number of parts, lowers costs, and improves the assembly efficiency and product reliability of the electric strut assembly.

[0040] Meanwhile, the electric strut assembly disclosed in this utility model, through step-by-step assembly and distributed welding, can reduce the requirements for tooling equipment, reduce assembly difficulty, and improve the assembly efficiency of the electric strut assembly. Attached Figure Description

[0041] The following is a brief explanation of the contents of each of the accompanying drawings and the markings in the drawings:

[0042] Figure 1 This is a schematic diagram of the structure of this utility model.

[0043] Figure 2 This is a schematic diagram of the outer shell body in this utility model.

[0044] Figure 3 This is a schematic diagram of the structure of the third support element in this utility model.

[0045] The markings in the above figures are all:

[0046] 1. First ball-and-socket structure; 2. Outer shell; 3. First rubber element; 4. Motor; 5. Gearbox assembly; 6. Second rubber element; 7. First support element; 8. Second support element; 9. Damper assembly; 10. Bearing; 11. Third support element; 12. Third rubber element; 13. Lead screw and nut assembly; 14. Helical spring; 15. Second outer shell; 16. Second ball-and-socket structure. Detailed Implementation

[0047] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and the description of the preferred embodiments.

[0048] An electric strut housing structure includes an outer shell 2; the outer shell 2 includes an outer shell body 21, and the outer shell body 21 has an assembly inner hole 22; the assembly inner hole 22 is a stepped hole; this utility model changes the welding position of subsequent components within the outer shell body 2 by designing the assembly inner hole 22 as a stepped hole; through the stepped distribution of laser welding positions, it avoids the components being squeezed and deformed during installation, ensures the concentricity of the component fit, and improves product quality and reliability.

[0049] The electric strut housing structure disclosed in this utility model is mainly a housing support structure, specifically including an outer shell 2; the outer shell 2 is generally a cylindrical structure; in this utility model, the outer shell 2 includes an outer shell body 21, and the outer shell body 21 is provided with an assembly inner hole 22; the assembly inner hole 22 is a stepped hole;

[0050] The outer shell 21 is the main structural part of the electric strut housing, which plays a role in supporting and protecting the internal components.

[0051] An internal mounting hole 22 is provided inside the outer casing 21 for mounting and fixing other components of the electric strut.

[0052] The assembly inner hole 22 adopts a stepped hole design, that is, the diameter of the inner hole varies at different positions, forming multiple inner hole segments with different diameters; at the same time, adjacent hole segments will form a stepped platform due to the difference in inner diameter, thereby realizing the axial assembly limit of the component; this design can also adapt to the installation of parts of different sizes, and provide convenience for welding and assembly processes.

[0053] In this utility model, the assembly inner hole 22 is provided through the outer shell body 21 along the central axis of the outer shell body 21; the assembly inner hole 22 extends from one end of the outer shell body 21 to the other end, forming a complete channel for assembling other components; the assembly inner hole 22 includes a first inner hole 221, a second inner hole 222, a third inner hole 223, a fourth inner hole 224, and a fifth inner hole 225; the first inner hole 221, the second inner hole 222, the third inner hole 223, the fourth inner hole 224, and the fifth inner hole 225 are connected and communicate with each other in sequence; the inner diameters of the first inner hole 221, the second inner hole 222, the third inner hole 223, and the fourth inner hole 224 are different; the assembly inner hole 22 is a stepped hole, which allows the assembly inner hole 22 to have different inner diameters at different positions, thereby adapting to the assembly of components of different sizes and providing multiple options for the installation and positioning of components.

[0054] The assembly inner hole 22 includes a first inner hole 221, a second inner hole 222, a third inner hole 223, a fourth inner hole 224, and a fifth inner hole 225; these five inner holes are connected in sequence and communicate with each other to form an integral assembly channel; this design allows parts of different sizes to be installed sequentially in the same assembly channel, improving the flexibility and efficiency of assembly.

[0055] The inner diameters of the first inner hole 221, the second inner hole 222, the third inner hole 223, and the fourth inner hole 224 are different; this indicates that the diameters of these four inner holes are different, and the diameter of each inner hole is designed according to the actual assembly requirements; this different inner diameter design can meet the assembly size requirements of different parts, so that each part can be assembled in a suitable inner hole, ensuring the stability and reliability of the assembly.

[0056] This also changes the welding position of subsequent components within the two sets of housings. The laser-welded parts of the housing 21 and the components are distributed in a stepped manner, so that they are not subjected to stress at the same time during interference fit installation. In addition, it can also prevent the components from being squeezed and deformed during installation, ensuring the concentricity of the component fit and improving product quality and reliability.

[0057] In this invention, the inner diameters of the first inner hole 221, the second inner hole 222, the third inner hole 223, and the fourth inner hole 224 gradually decrease; the inner diameter of the fifth inner hole 225 is larger than that of the fourth inner hole 224; in this invention, the inner diameter of the first inner hole 221 is the largest, the inner diameter of the second inner hole 222 is smaller than that of the first inner hole 221, the inner diameter of the third inner hole 223 is smaller than that of the second inner hole 222, and the inner diameter of the fourth inner hole 224 is the smallest; then the inner diameter of the fifth inner hole 225 is larger than that of the fourth inner hole 224; generally, it is required that the inner diameter of the fifth inner hole 225 and the third inner hole can be the same; in this invention, the first inner hole 221 has a larger inner diameter to accommodate larger components, such as facilitating the insertion of the first ball-and-socket structure 1, and also facilitating the subsequent placement and assembly of other components from the first inner hole 221 into the inner side of the outer shell body 21.

[0058] The moderate inner diameter of the second inner hole 222 can accommodate medium-sized components, such as the motor 4 or the gearbox assembly 5.

[0059] The smaller inner diameter of the third inner hole 223 can accommodate smaller components, such as the first support element 7, the second support element 8, and damping components.

[0060] The fourth inner hole 224 is the smallest inner diameter, and in this utility model it is mainly used to limit the installation of the third support element 11.

[0061] The fifth inner hole 225 has a larger inner diameter than the fourth inner hole 224, and can be used to install some special parts that require more space, such as the helical spring 14 or other auxiliary components.

[0062] The above design ensures that each component can be assembled in a suitable inner hole, while the larger inner diameter of the fifth inner hole 225 can provide sufficient space for some components that require more space, ensuring the stability, feasibility and reliability of the assembly.

[0063] Furthermore, the housing structure described in this utility model also includes a support structure disposed within the outer shell 2; through the provision of the support structure, this utility model can realize the partitioned arrangement of various components inside the electric strut assembly.

[0064] The support structure described in this utility model includes a first support element 7, a second support element 8 and / or a third support element 11; in this utility model, the first support element 7 is used to provide a specific support function and can be used to support the motor 4, the gearbox assembly 5 or other key components.

[0065] The second support element 8 is also used to provide support and placement functions, and can be used to place the damping assembly or to support the screw and nut assembly 13 or other intermediate components.

[0066] The third support element 11 can be used to support the bearing 10, sealing elements or other auxiliary components.

[0067] In this invention, the support structure can be composed of one or more support elements, depending on the design requirements of the electric strut; this design provides flexibility, allowing for the selection of appropriate combinations of support elements according to different application scenarios.

[0068] The support structure can enhance the structural stability of the outer shell 21, ensure the stability of the components during assembly and use, and reduce vibration and deformation.

[0069] In this invention, the support structure can integrate multiple functions, such as support, positioning, and sealing. This integrated design can reduce the number of parts, lower assembly difficulty, and improve assembly efficiency.

[0070] The support structure is usually tightly fitted with the mounting inner hole 22 of the outer shell body 21 and connected to the outer shell body 21 by welding or other fixing methods to ensure the overall structural integrity.

[0071] In this utility model, the third support element 11 includes a third support body 11-4, which has a through hole. The third support body 11-4 is the main structure of the third support element 11, serving to support and connect other components. The through hole is mainly used for the through installation of the lead screw and nut assembly 13. Specifically, in this utility model, the through hole includes a main through hole 11-3 and an assembly inner groove. The assembly inner groove is connected to the main through hole 11-3. The main through hole 11-3 is the main channel through the third support body 11-4 and is used to assemble key components, such as the lead screw.

[0072] The inner groove of the assembly is connected to the through hole 11-3 of the main body, but its inner diameter is larger than that of the through hole 11-3 of the main body. This design provides additional space for assembly, making it convenient to install and fix other components, such as bearing 10 and rubber elements for sealing and shock absorption.

[0073] In this utility model, the inner diameter of the assembly inner groove is larger than the inner diameter of the main through hole 11-3; the through hole is a stepped hole; the through hole is a stepped hole, that is, the inner diameters of the main through hole 11-3 and the assembly inner groove are different, forming a stepped shape; this design can better adapt to parts of different sizes, improve the flexibility and accuracy of assembly, and realize the installation and positioning of corresponding parts.

[0074] In addition, in this utility model, an outer ring groove 11-5 is provided on the outer side of the third support body 11-4; the outer ring groove 11-5 forms a stepped platform on the third support body 11-4; the length of the outer ring groove 11-5 is less than the length of the third support body 11-4; the assembly through hole and the outer ring groove 11-5 are distributed at both ends of the third support body 11-4; the outer ring groove 11-5 is located on the outer side of the third support body 11-4, forming a stepped platform; the outer ring groove 11-5 can be used for the helical spring 14; and the length of the outer ring groove 11-5 is less than the length of the third support body 11-4. This arrangement facilitates the formation of a stepped platform on the outer side of the third support body 11-4, which is convenient to act as a positioning part during subsequent assembly, so as to realize the installation and positioning of the helical spring 14.

[0075] In this utility model, the inner groove and outer ring groove 11-5 are distributed at both ends of the third support body 11-4. This design allows the third support element 11 to achieve the installation and positioning of different parts at both ends. In other words, the third support element 11 disclosed in this utility model can achieve the installation and positioning of different parts in its axial direction, which greatly reduces the trouble of traditionally requiring multiple single positioning parts for component positioning.

[0076] In addition, the third support element 11 in this utility model integrates multiple functions, such as support, assembly and sealing, which reduces the number of parts, reduces assembly difficulty and improves assembly efficiency.

[0077] The assembly inner groove in this utility model includes a first inner groove 11-1 and a second inner groove 11-2; the first inner groove 11-1 is connected to the main body through hole 11-3 through the second inner groove 11-2; the inner diameter of the first inner groove 11-1 is larger than the inner diameter of the second inner groove 11-2, and the inner diameter of the second inner groove 11-2 is larger than the inner diameter of the main body through hole 11-3; the first inner groove 11-1 is used to install and assemble the bearing 10, while the second inner groove 11-2 is used to place the rubber component; through the design of the first inner groove 11-1 and the second inner groove 11-2, a two-stage stepped groove is also formed in the assembly inner groove, which is convenient for the assembly and positioning of the bearing 10 and the rubber component.

[0078] In this utility model, the first inner groove 11-1 has the largest inner diameter and is used to install the bearing 10; design advantages: the larger inner diameter can accommodate the outer ring of the bearing 10; ensuring the stable installation and positioning of the bearing 10.

[0079] The inner diameter of the second inner groove 11-2 is smaller than that of the first inner groove 11-1, but larger than that of the main through hole 11-3; it is used to place rubber components; the appropriate inner diameter can accommodate rubber components, provide cushioning and sealing functions, and prevent liquid or dust from entering.

[0080] Furthermore, in this utility model, a protruding component is provided at the end of the main through hole 11-3 away from the inner groove of the assembly. The protruding component can support and limit the lead screw and nut assembly 13. This design ensures that the lead screw and nut assembly 13 can maintain a stable position during operation, reduce vibration and offset, and thus improve the overall performance and reliability of the electric strut. At the same time, the protruding component includes multiple support protrusions 11-6 distributed in a ring at intervals on the inner wall of the main through hole 11-3. The adjacent support protrusions 11-6 are distributed at intervals to form exhaust gaps 11-7. The exhaust gaps 11-7 can reduce the running resistance of the lead screw and nut assembly 13. By allowing air or other gases to flow in the gap, the additional resistance caused by gas compression or vacuum effect is avoided, thereby improving operating efficiency and smoothness.

[0081] Furthermore, in this utility model, the second support element 8 includes a second support body, and the second support body is provided with a second inner cavity; the first support element 7 includes a first support body, and the first support body is provided with a first inner cavity; the main bodies of the second support element 8 and the first support element 7 in this utility model are both hollow cylindrical structures; in this utility model, the first support body is a hollow cylindrical structure; the first inner cavity is located inside the first support body and is used to assemble other components; the first support element 7 is mainly used to support and fix key components to ensure their stability and accuracy during operation.

[0082] The second support body is a hollow cylindrical structure; the second inner cavity is located inside the second support body and is used to assemble other components, such as damping components.

[0083] The second support element 8 is mainly used to support and fix intermediate-sized components, ensuring their stability and accuracy during operation.

[0084] Furthermore, in this utility model, the second support element 8 is connected to the first support element 7 or the third support element 11 through a limiting mechanism 17; the limiting mechanism 17 includes a limiting protrusion 171 provided on the second support body and a limiting groove 172 provided on the first support body or the third support body 11-4; the limiting protrusion 171 on the second support element 8 is inserted into the limiting groove 172 on the first support body or the third support body 11-4; through the setting of the limiting mechanism 17, the position between the second support element 8 and the first support element 7 or the third support element 11 can be limited; relative rotation between the second support element 8 and the first support element 7 or the third support element 11 is avoided.

[0085] In this utility model, the limiting mechanism 17 mainly includes a limiting protrusion 171 and a limiting groove 172.

[0086] In actual design, the limiting protrusion 171 is provided on the second support body, and the limiting groove 172 is provided on the first support element 7 or the second support element 8. The limiting protrusion 171 is used to cooperate with the limiting groove 172.

[0087] Of course, the above design can also be reversed, that is, the limiting groove 172 is set on the second support element 8, and the limiting protrusion 171 is set on the first support element 7 or the second support element 8.

[0088] In use, the limiting protrusion 171 on the second support element 8 is inserted into the limiting groove 172 on the first support body or the third support body 11-4; this design ensures that the relative position between the second support element 8 and the first support element 7 or the third support element 11 is fixed, preventing displacement or loosening during operation.

[0089] Based on the above design, the insertion and engagement of the limiting protrusion 171 and the limiting groove 172 can ensure that the relative position between the second support element 8 and the first support element 7 or the third support element 11 is fixed, thereby improving the stability of the overall structure.

[0090] This design effectively prevents parts from loosening due to vibration or other external forces during operation, thus improving the reliability of the electric strut.

[0091] In this utility model, the number of limiting mechanisms 17 can be selected as needed.

[0092] The design of the limiting mechanism 17 makes the assembly process between the second support element 8 and the first support element 7 or the third support element 11 simpler, reduces the adjustment and calibration steps during assembly, and improves assembly efficiency; the limiting mechanism 17 can ensure the positional accuracy of the parts during the assembly process, reduce assembly errors, and improve the reliability of the overall structure.

[0093] Meanwhile, similar limiting mechanisms 17 described above can also be used to achieve installation and positioning between adjacent components in other parts of the electric strut assembly.

[0094] An electric strut assembly includes an electric strut housing structure; the electric strut housing structure houses a drive assembly and a driven assembly; the drive assembly is capable of driving the driven assembly to move; the drive assembly includes a drive mechanism and a reduction gearbox assembly 5; the driven assembly includes a damper assembly 9 and a lead screw and nut assembly 13; the drive mechanism is capable of driving the lead screw and nut assembly 13 to move via the reduction gearbox assembly 5; the electric strut housing structure has a first ball joint structure 1 at one end near the drive assembly; the lead screw and nut assembly 13 is connected to a drive mechanism at the other end away from the drive assembly. The second ball-and-socket structure 16 is connected to the second outer shell 15; the second outer shell 15 is sleeved on the lead screw and nut assembly 13; a helical spring 14 is provided between the second outer shell 15 and the third support element 11; the helical spring 14 is sleeved on the third support element 11; in the electric strut housing structure, the first support element 7 and the third support element 11 are welded inside the outer shell body 21; the first ball-and-socket structure 1 is welded to the end of the outer shell body 21; the outer shell body 21 disclosed in this utility model serves as the main structure of the entire electric strut, providing support and protection.

[0095] The inner hole 22 is designed as a stepped hole for installing different components, such as the first support element 7, the second support element 8, and the third support element 11.

[0096] The drive assembly includes the drive mechanism: the drive mechanism provides power, typically an electric motor 4.

[0097] The gearbox assembly 5 is connected to the drive mechanism to reduce the speed and increase the torque, ensuring that the lead screw and nut assembly 13 can operate smoothly.

[0098] Driven assembly main damper assembly 9: Damper assembly 9 is used to provide damping force to ensure the smoothness and controllability of the electric strut during movement.

[0099] The lead screw and nut assembly 13 achieves linear motion through threaded transmission and is the core moving component of the electric strut.

[0100] The first ball socket structure 1 is located at one end of the electric strut housing structure near the drive assembly and is used to install and fix the electric strut assembly.

[0101] Second ball socket structure 16: Located at the end of the lead screw and nut assembly 13 away from the drive assembly, it is used to connect the second housing 15 and provide flexible movement and support.

[0102] The second housing 15 is sleeved on the lead screw and nut assembly 13, and the external protective part of the protruding area; at the same time, a helical spring 14 is provided on the inner side of the second housing 15, that is, a helical spring 14 is provided between the second housing 15 and the third support element 11, and the helical spring 14 is used to provide elastic support and cushioning.

[0103] The damper assembly 9 provides damping force to ensure the smoothness and controllability of the electric strut during movement.

[0104] The lead screw and nut assembly 13 achieves linear motion through threaded transmission, ensuring the accuracy and reliability of the motion; the lead screw and nut assembly 13 and the damper assembly 9 can be selected from existing structures, and the specific structure will not be described in detail here.

[0105] In this utility model, the first support element 7 is welded inside the outer shell body 21 and is used to axially support the limiting drive assembly.

[0106] The third support element 11 is welded inside the housing body 21 to support the driven assembly, particularly the lead screw and nut assembly 13.

[0107] The second support element 8 is arranged between the first support element 7 and the third support element 11, and is mainly used to support and place the damper assembly 9.

[0108] The helical spring 14 is sleeved on the third support element 11 to provide elastic support and ensure the stability and reliability of the electric strut during movement.

[0109] The first ball-and-socket structure 1 and the second ball-and-socket structure 16 provide a flexible motion connection, ensuring that the electric strut can operate smoothly at different angles and positions.

[0110] The helical spring 14 provides elastic support, reducing impact and vibration during movement and improving overall stability and reliability.

[0111] The first support element 7 and the third support element 11 are welded inside the outer shell body 21, ensuring the structural robustness and stability; at the same time, by matching the stepped assembly inner hole 22, the laser-welded parts of the outer shell body 21 are steppedly distributed, and the interference fit installation does not subject them to stress at the same time.

[0112] In addition, the step-by-step assembly of this utility model reduces assembly interference between components, while enabling the support structure to support, limit, and position the components inside the outer shell 21.

[0113] Furthermore, the electric strut assembly described in this invention also includes an elastic unit, which includes at least one rubber element; the elastic unit in this invention enables the electric strut assembly to achieve buffering and sealing.

[0114] In this utility model, the elastic unit is provided with at least three rubber elements, namely a first rubber element 3, a second rubber element 6 and a third rubber element 12; the first rubber element 3 is arranged between the drive assembly and the first ball-and-socket structure 1, and the first rubber element 3 can be arranged at the connection between the first inner hole 221 and the second inner hole 222.

[0115] The second rubber element 6 is arranged between the first support element 7 and the drive assembly, that is, the second inner hole 222 is used for the connection of the third inner hole 223.

[0116] The third rubber element 12 is arranged inside the third support element 11, and is generally arranged in the second inner groove 11-2.

[0117] This invention enables the internal components of the electric strut assembly to move axially through the setting of the elastic unit, and the elastic unit can also play a good role in sealing and protection.

[0118] Furthermore, in this invention, the first ball-and-socket structure 1 is welded and fixed within the first inner hole 221 of the outer shell body 21; the first support element 7 is welded and fixed within the third inner hole 223 of the outer shell body 21; and the third support element 11 is welded and fixed within the fourth inner hole 224 of the outer shell body 21. This invention allows for the regional welding of corresponding components, enabling regional welding operations on the outer shell body 21. Additionally, by welding support elements and ball-and-socket structures within specific inner holes, combined with the stepped inner hole structure of the outer shell body 21, the laser-welded portions of the electric strut assembly are arranged in a stepped manner, preventing simultaneous stress on the outer shell body 21 during interference fit installation. This effectively avoids or reduces deformation during component installation.

[0119] In this utility model, the first support element 7, the second support element 8, the driven assembly, the third support element 11 and the rubber element are first installed inside the outer shell body 21; then the first support element 7 and the third support element 11 are welded and fixed inside the outer shell body 21.

[0120] Then the first ball socket structure 1, the drive assembly, and the rubber components are installed inside the housing body 21; then the first ball socket structure 1 is inserted into the end of the housing body 21 and welded in place.

[0121] After installing the helical spring 14 and the second housing 15, the second housing 15 is riveted to the lead screw and nut assembly 13 via the second ball socket structure 16.

[0122] Based on the above, it can be understood that the present invention requires the support structure and driven assembly to be assembled first. During the assembly process, the welding between the third support element 11 and the first support element 7 and the outer shell body 21 is realized respectively. Then, the drive assembly and the first ball socket structure 1 and other structures are assembled. After the assembly is completed, the welding between the first ball socket structure 1 and the outer shell body 21 is carried out. After the welding is completed, the second outer shell 15, the second ball socket structure 16 and the coil spring 14 are assembled.

[0123] This invention improves assembly efficiency and precision by using a step-by-step assembly method, first installing the support structure and driven assembly, and then installing the drive assembly and ball socket structure.

[0124] Example 1:

[0125] This utility model discloses an electric strut assembly, which mainly includes: a first ball-and-socket structure 1, a housing 2, a first rubber element 3, a drive mechanism (motor 4), a gearbox assembly 5, a second rubber element 6, a first support element 7, a second support element 8, a damper assembly 9, a bearing 10, a third support element 11, a third rubber element 12, a lead screw and nut assembly 13, a helical spring 14, a second housing 15, and a second ball-and-socket structure 16, the structure of which is as follows. Figure 1 As shown, there are three laser welding positions. After the assembly is completed in stages, laser welding positions 1 and 2 are welded first, and then laser welding position 3 is welded.

[0126] The motor 4 and the gearbox assembly 5 serve as the driving body, driving the lead screw and nut assembly 13 to move linearly, thereby realizing the extension and compression function of the electric strut. The damper assembly 9 and the helical spring 14 are assembled with the lead screw and nut assembly 13 to realize the electric tailgate support and suspension function.

[0127] The laser welding positions inside the outer shell 2 are distributed in a stepped manner.

[0128] like Figure 1As shown, there are three laser welding positions. First, after installing the first support element 7, the second support element 8, the damper assembly 9, the bearing 10, the third support element 11, the third rubber element 12, and the lead screw and nut assembly 13 inside the assembly inner hole 22 of the outer shell 2, laser welding is performed at positions 1 and 2. Then, the first ball socket structure 1, the motor 4, the gearbox assembly 5, the first rubber element 3, and the second rubber element 6 are installed inside the assembly inner hole 22 of the outer shell 2, and laser welding is performed at position 3. Finally, after installing the helical spring 14 and the second outer shell 15, they are riveted together with the lead screw and nut assembly 13 through the second ball socket structure 16.

[0129] The outer shell 2 is circumferentially welded to the first ball-and-socket structure 1, the first support element 7, and the second support element 8 at laser welding positions 1, 2, and 3, which ensures the connection strength and also serves as a seal.

[0130] The motor 4 and the gearbox assembly 5 inside the mounting bore 22 of the outer shell 2 serve as the driving body. The two are assembled together by radial laser welding and axial screw locking. One end of the lead screw in the lead screw and nut assembly 13 is sequentially inserted into the third rubber element 12, the third support element 11, the bearing 10, the second support element 8, the damper assembly 9, the first support element 7, the second rubber element 6, and the gearbox assembly 5. The driving body drives the lead screw and nut assembly 13 to move linearly, realizing the extension and compression function of the electric strut.

[0131] The position of the drive body in the assembly inner hole 22 of the housing 2 is limited by the first ball socket structure 1 and the first support element 7. The first rubber element 3 provides buffering and retains a small degree of freedom in the axial direction. The second rubber element 6 provides buffering for the axial and radial direction of the gearbox assembly 5, and also provides axial limiting and buffering for the damper assembly 9.

[0132] The third rubber element 12 is used for sealing and waterproofing the bearing 10 side.

[0133] The damper assembly 9 and the helical spring 14 are assembled with the lead screw and nut assembly 13 to realize the electric tailgate support and hovering function.

[0134] The damper assembly 9 is installed in the inner cavity of the second support element 8. It is axially limited by the first support element 7 and the second rubber element 6. The relative position between the outer shell 2 of the damper assembly 9 and the second support element 8 can be limited by the limiting mechanism 17. That is, the outer shell 2 of the damper assembly 9 and the inner cavity of the second support element 8 have grooves in the radial direction to limit rotation. The outer diameters of the second support element 8, the first support element 7, and the third support element 11 are respectively limited by the limiting mechanism 17. Specifically, the outer diameters of the second support element 8, the first support element 7, and the third support element 11 have grooves to limit rotation. The first support element 7 has grooves to limit the rotation of the gearbox assembly 5.

[0135] like Figure 2 As shown, the assembly inner hole 22 is a stepped hole; the inner cavity diameter of the laser welding position is: D1>D2>D3, and the outer shell body 21 can be made of a light-transmitting material corresponding to the above welding position.

[0136] like Figure 3 As shown, the first inner groove 11-1 of the third support element 11 transitions or has a small interference fit with the outer diameter of the bearing 10, and the second inner hole 222 transitions or has a small interference fit with the outer diameter of the third rubber element 12. The first inner groove 11-1 can be provided with a groove so that it cooperates with the protrusion of the damper assembly 9 to prevent rotation. The maximum outer diameter of the third support element is interference-fitted with the fourth inner hole 224 of the assembly inner hole 22 to facilitate laser welding. The outer ring groove 11-5 has a small clearance fit with the inner diameter of the coil spring 14. At the same time, the protruding part in the inner hole at the end of the third support element 11 has a small clearance fit with the lead screw and nut assembly 13. An exhaust gap 11-7 is formed between adjacent support protrusions 11-6, and the exhaust gap 11-7 is used for exhaust.

[0137] Obviously, the specific implementation of this utility model is not limited to the above-mentioned methods. Any non-substantial improvements made using the inventive concept and technical solution of this utility model are within the protection scope of this utility model.

Claims

1. An electric strut housing structure, characterized in that, Includes an outer shell (2); the outer shell (2) includes an outer shell body (21), and the outer shell body (21) is provided with an inner mounting hole (22); the inner mounting hole (22) is a stepped hole; The assembly inner hole (22) is provided through the outer shell body (21) along the central axis of the outer shell body (21); the assembly inner hole (22) includes a first inner hole (221), a second inner hole (222), a third inner hole (223), a fourth inner hole (224) and a fifth inner hole (225); the first inner hole (221), the second inner hole (222), the third inner hole (223), the fourth inner hole (224) and the fifth inner hole (225) are connected and communicate with each other in sequence; the inner diameters of the first inner hole (221), the second inner hole (222), the third inner hole (223) and the fourth inner hole (224) are different.

2. The electric strut housing structure according to claim 1, characterized in that, The inner diameters of the first inner hole (221), the second inner hole (222), the third inner hole (223), and the fourth inner hole (224) gradually decrease; the inner diameter of the fifth inner hole (225) is greater than that of the fourth inner hole (224).

3. The electric strut housing structure according to claim 1, characterized in that, The housing structure also includes a support structure disposed within the outer shell (2); the support structure includes a first support element (7), a second support element (8) and / or a third support element (11).

4. The electric strut housing structure according to claim 3, characterized in that, The third support element (11) includes a third support body, and the third support body is provided with a through hole that penetrates the third support body; The through hole includes a main body through hole (11-3) and an assembly inner groove; the assembly inner groove is connected to the main body through hole (11-3); The inner diameter of the assembly inner groove is larger than the inner diameter of the main body through hole (11-3); the through hole is a stepped hole; The outer side of the third support body is provided with an outer ring groove; the outer ring groove forms a stepped platform on the third support body; the length of the outer ring groove is less than the length of the third support body; The assembly through holes and outer annular grooves are distributed at both ends of the third support body.

5. The electric strut housing structure according to claim 4, characterized in that, The assembly inner groove includes a first inner groove (11-1) and a second inner groove (11-2); the first inner groove (11-1) is connected to the main body through hole (11-3) through the second inner groove (11-2); the inner diameter of the first inner groove (11-1) is larger than the inner diameter of the second inner groove (11-2), and the inner diameter of the second inner groove (11-2) is larger than the inner diameter of the main body through hole (11-3).

6. The electric strut housing structure according to claim 4, characterized in that, The main through hole (11-3) has a protruding component at the end away from the inner groove of the assembly; the protruding component includes a plurality of support protrusions (11-6) that are spaced and annularly distributed on the inner wall of the main through hole (11-3); the adjacent support protrusions (11-6) are spaced apart to form an exhaust gap (11-7).

7. The electric strut housing structure according to any one of claims 3-6, characterized in that, The second support element (8) includes a second support body, which has a second inner cavity; the first support element (7) includes a first support body, which has a first inner cavity.

8. The electric strut housing structure according to claim 7, characterized in that, The second support element (8) is connected to the first support element (7) or the third support element (11) through a limiting mechanism (17); the limiting mechanism (17) includes a limiting protrusion (171) provided on the second support body and a limiting groove (172) provided on the first support body or the third support body; the limiting protrusion (171) on the second support element (8) is inserted into the limiting groove (172) on the first support body or the third support body.

9. An electric strut assembly, characterized in that, Includes the electric strut housing structure as described in any one of claims 1-8; the electric strut housing structure is provided with a drive assembly and a driven assembly; The drive assembly can drive the driven assembly to move; The drive assembly includes a drive mechanism and a gearbox assembly (5); the driven assembly includes a damper assembly (9) and a lead screw and nut assembly (13); the drive mechanism can drive the lead screw and nut assembly (13) to run through the gearbox assembly (5); The electric strut housing structure has a first ball joint structure (1) near the drive assembly end; the lead screw and nut assembly (13) is connected to a second outer shell (15) via a second ball joint structure (16) at the end away from the drive assembly; the second outer shell (15) is sleeved on the lead screw and nut assembly (13); a helical spring (14) is provided between the second outer shell (15) and the third support element (11); the helical spring (14) is sleeved on the third support element (11); In the electric strut housing structure, the first support element (7) and the third support element (11) are welded inside the outer shell body (21); the first ball socket structure (1) is welded to the end of the outer shell body (21).

10. An electric strut assembly according to claim 9, characterized in that, The electric strut assembly also includes an elastic unit, which includes at least one rubber element; the first ball-and-socket structure (1) is welded and fixed in the first inner hole (221) of the outer shell body (21); the first support element (7) is welded and fixed in the third inner hole (223) of the outer shell body (21); the third support element (11) is welded and fixed in the fourth inner hole (224) of the outer shell body (21); First, install the first support element (7), the second support element (8), the driven assembly, the third support element (11), and the rubber element inside the outer shell body (21); then weld and fix the first support element (7) and the third support element (11) inside the outer shell body (21); Then the first ball socket structure (1), the drive assembly and the rubber components are installed inside the housing body (21); then the first ball socket structure (1) is inserted into the end of the housing body (21) and welded in place; After installing the helical spring (14) and the second housing (15), the second housing (15) is riveted to the lead screw and nut assembly (13) through the second ball socket structure (16).

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