Damper, electrically powered strut and vehicle

Abstract

This utility model belongs to the field of automotive parts technology, and discloses a damper, an electric strut, and a vehicle. The damper includes a damper housing, a damping assembly, and a buffer. The damper housing has a receiving cavity. The damping assembly includes a connecting shaft and an elastic element sleeved outside the connecting shaft. The connecting shaft and the elastic element are located within the receiving cavity. Each end of the elastic element has a support leg. The buffer is located within the receiving cavity and fixed to the damper housing. Both support legs abut against the buffer; or one support leg abuts against the damper housing, and the other support leg abuts against the buffer. The damper, electric strut, and vehicle provided by this utility model, by adding a buffer at the gap between the two support legs of the elastic element and the damper housing, reduce the gap between the support legs of the elastic element and the damper housing. This prevents the support legs of the elastic element from striking the damper housing and producing abnormal noise when the electric strut starts or reverses, thereby improving the quietness and noise reduction performance of the vehicle.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and in particular to dampers, electric struts, and vehicles. Background Technology

[0002] In the development of the modern automotive industry, the application of electric struts has become increasingly widespread, especially in the opening and closing operations of components such as tailgates and hoods. Electric struts, with their automated and convenient features, greatly enhance the user experience. As a key component of the electric strut system, the performance of the damper directly affects the working stability and reliability of the electric strut.

[0003] Currently, among the common types of dampers on the market, torsion spring dampers are widely used due to their relatively simple structure and low cost. This type of damper primarily provides damping force through the elastic deformation of the spring to buffer and control the movement of the electric strut. However, in actual use, torsion spring dampers have revealed a serious problem: when the strut starts or reverses direction, the spring leg strikes the housing, producing a knocking noise that fails to meet the noise reduction requirements of automobile operation. Utility Model Content

[0004] The purpose of this utility model is to provide a damper, an electric strut, and a vehicle that can prevent the spring leg from striking the damper housing and causing abnormal noise, thus meeting the requirements for quiet operation of automobiles.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] Dampers, including:

[0007] The damper housing has a receiving cavity;

[0008] A damping assembly includes a connecting shaft and an elastic element sleeved outside the connecting shaft. The connecting shaft and the elastic element are disposed in a receiving cavity, and both ends of the elastic element are provided with support legs.

[0009] A buffer element is disposed within the receiving cavity and fixed to the damper housing, with both legs abutting against the buffer element; or, one leg abuts against the damper housing and the other leg abuts against the buffer element.

[0010] Preferably, the damper housing includes a base and an end cap. The base is cylindrical, and the end cap is detachably connected to the base. The end cap and the base enclose a receiving cavity, and the end cap can be pressed against the connecting shaft.

[0011] Preferably, the connecting shaft is fixed relative to the inner wall of the damper housing, and the connecting shaft is used to connect with the lead screw drive of the electric strut.

[0012] Preferably, the inner peripheral wall of the damper housing is provided with a limiting protrusion, and the outer peripheral wall of the connecting shaft is provided with a limiting groove, with the limiting protrusion and the limiting groove engaging in a snap-fit ​​fit.

[0013] Preferably, the limiting protrusion is integrally formed into the damper housing.

[0014] Preferably, the connecting shaft can be engaged with the lead screw key of the electric strut.

[0015] Preferably, the outer peripheral surface of the damper housing is provided with reinforcing ribs.

[0016] Electric struts, including:

[0017] Dampers for any of the above technical solutions;

[0018] The strut housing and the damper housing are mounted on the strut housing;

[0019] The strut body is movably mounted on the strut housing;

[0020] The telescopic unit has its output end fixedly connected to the main body of the strut. The telescopic unit is used to drive the main body of the strut to extend and retract along its own axis.

[0021] Preferably, the telescopic unit includes:

[0022] The drive component is mounted on the strut housing;

[0023] The lead screw is rotatably connected to the support rod housing. The lead screw extends along the axial direction of the support rod body and is connected to the output end of the drive component. The drive component is used to drive the lead screw to rotate. The lead screw is connected to the connecting shaft for transmission.

[0024] The nut is connected to the lead screw drive and is configured to reciprocate linearly along the axial direction of the strut body. The nut is fixed to the strut body.

[0025] The vehicle includes a vehicle body, a door installed on the vehicle body, and an electric strut of any of the above technical solutions, wherein the electric strut is disposed between the vehicle body and the door.

[0026] The beneficial effects of this utility model are:

[0027] The damper, electric strut, and vehicle provided by this utility model reduce the gap between the elastic element's legs and the damper housing by adding a buffer component at the gap between the elastic element's legs and the damper housing. The buffer component absorbs the energy generated by the movement of the legs, preventing the elastic element's legs from striking the damper housing and causing abnormal noise when the electric strut starts or reverses. Moreover, the buffer component's buffering effect can reduce the vibration and noise of the system, thereby improving the vehicle's quietness and noise reduction performance. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of a damper employing two buffer components provided in an embodiment of this utility model;

[0029] Figure 2 This is the explosion intention of the damper with two buffers provided in the embodiment of this utility model;

[0030] Figure 3 This is a schematic diagram of the structure of a damper employing a buffer element provided by an embodiment of the present invention;

[0031] Figure 4 This is the explosion intent of the damper using a buffer element provided in the embodiment of this utility model;

[0032] Figure 5 This is an exploded view of the electric strut provided in the embodiment of this utility model.

[0033] In the diagram: 1. Damper housing; 11. Base; 12. End cap;

[0034] 2. Damping assembly; 21. Connecting shaft; 22. Elastic element; 221. First leg; 222. Second leg;

[0035] 3. Buffer component; 4. Support rod housing; 5. Support rod body; 6. Drive component; 7. Lead screw; 8. Protective shell. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0037] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0040] This utility model provides a damper, an electric strut including the damper, and a vehicle including the electric strut. The electric strut is used to open and close vehicle doors (including tailgates and side doors) or hoods. Exemplarily, the electric strut opens and closes vehicle doors. The following description uses an example where the electric strut is installed between the vehicle body and a vehicle door to illustrate the electric strut in detail.

[0041] like Figure 1-4 As shown, an embodiment of this utility model provides a damper, including a damper housing 1, a damping assembly 2, and a buffer member 3. The damper housing 1 has a receiving cavity. The damping assembly 2 includes a connecting shaft 21 and an elastic member 22 sleeved outside the connecting shaft 21. The connecting shaft 21 and the elastic member 22 are disposed within the receiving cavity. Both ends of the elastic member 22 are provided with legs. The buffer member 3 is disposed within the receiving cavity and fixed to the damper housing 1, with both legs abutting against the buffer member 3. Specifically, the elastic member 22 is a torsion spring, and the buffer member 3 is made of rubber.

[0042] By adding a buffer 3 at the gap between the two legs of the elastic element 22 and the damper housing 1, the gap between the legs of the elastic element 22 and the damper housing 1 is reduced. The buffer 3 absorbs the energy brought by the movement of the legs, which can prevent the legs of the elastic element 22 from hitting the damper housing 1 and producing abnormal noise when the electric strut starts or reverses. Moreover, the buffering effect of the buffer 3 can also reduce the vibration and noise of the system, thereby improving the quietness and noise reduction performance of the car.

[0043] Reference Figure 1 and Figure 2The first leg 221 and the second leg 222 of the elastic element 22 respectively abut against the buffer element 3. The buffer element 3 can effectively prevent the legs of the elastic element 22 from being damaged by direct impact on the damper housing 1, and the buffer element 3 also acts as a blocking and limiting element for the first leg 221 and the second leg 222. When the legs come into contact with the buffer element 3, the buffer element 3 will suppress the vibration of the legs and prevent them from generating large-amplitude oscillations, thereby achieving a noise reduction effect.

[0044] In other embodiments, one leg of the elastic member 22 may abut against the damper housing 1, and the other leg may abut against the buffer member 3. For example... Figure 2 and Figure 3 As shown, the first leg 221 abuts against the damper housing 1, and the second leg 222 abuts against the buffer 3. The damper housing 1 and the buffer 3 together act as a blocking and limiting force on the first leg 221 and the second leg 222.

[0045] For example, the buffer 3 is assembled to the damper housing 1. In other embodiments, the buffer 3 may also be coated onto the damper housing 1 using a two-color injection molding or a two-stage coating process.

[0046] Alternatively, the buffer 3 can also be made of soft plastic, which can absorb energy, buffer, and reduce noise.

[0047] Furthermore, the damper housing 1 includes a base 11 and an end cap 12. The base 11 is cylindrical, and the end cap 12 is detachably connected to the base 11. The end cap 12 and the base 11 enclose a receiving cavity, and the end cap 12 can be pressed against the connecting shaft 21.

[0048] The end cap 12 is detachably connected to the base 11, which facilitates disassembly and assembly. During later maintenance, repair or replacement of parts, the end cap 12 can also be easily removed to inspect and replace internal components, thus improving production and maintenance efficiency.

[0049] The end cap 12 can be pressed against the connecting shaft 21, which helps to stabilize the position of the connecting shaft 21. During the operation of the damper, the connecting shaft 21 may be subjected to various external forces, causing it to shake or shift. The pressing action of the end cap 12 can limit the movement of the connecting shaft 21, keeping it in the correct position, thereby ensuring the normal operation of the damper.

[0050] For example, the end cap 12 is snap-fitted to the base 11. In other embodiments, the end cap 12 and the base 11 may also be threaded together.

[0051] Furthermore, the connecting shaft 21 is fixed relative to the inner wall of the damper housing 1, and the connecting shaft 21 is used for transmission connection with the lead screw 7 of the electric strut.

[0052] The connecting shaft 21 is fixed relative to the inner wall of the damper housing 1, allowing the damper to better control the movement of the connecting shaft 21 and effectively reduce the shaking and offset of the connecting shaft 21 during transmission. When the lead screw 7 of the electric strut drives the connecting shaft 21 to move, the damper can promptly sense and generate corresponding damping force, effectively buffering and suppressing vibrations and impacts during movement, and improving the stability and comfort of the system.

[0053] For example, the inner peripheral wall of the damper housing 1 is provided with a limiting protrusion, and the outer peripheral wall of the connecting shaft 21 is provided with a limiting groove, and the limiting protrusion and the limiting groove are engaged.

[0054] The snap-fit ​​between the limiting protrusion and the limiting groove ensures a reliable connection between the connecting shaft 21 and the damper housing 1, allowing power or torque to be stably transmitted from the connecting shaft 21 to other components inside the damper. This reduces slippage and loosening during transmission, improving transmission efficiency and stability. Furthermore, the snap-fit ​​between the limiting protrusion and the limiting groove provides a precise installation position for the connecting shaft 21 within the damper housing 1, ensuring that the connecting shaft 21 is in the correct installation position and preventing installation position deviations from affecting the normal operation of the damper.

[0055] In other embodiments, the connecting shaft 21 may also be directly pressed between the base 11 and the end cap 12.

[0056] Furthermore, the limiting protrusion is integrally formed into the damper housing 1. This arrangement makes the limiting protrusion and the damper housing 1 a complete structure, improving the overall strength and thus enhancing the structural stability and reliability of the entire damper.

[0057] Furthermore, the connecting shaft 21 can be keyed with the lead screw 7 of the electric strut. The keyed connection can establish a reliable connection between the connecting shaft 21 and the lead screw 7, improve the connection stability between the connecting shaft 21 and the lead screw 7, and has a simple structure and is easy to disassemble.

[0058] Optionally, the lead screw 7 connecting the connecting shaft 21 and the electric strut can be connected by a spline or a flat key.

[0059] Specifically, the shaft hole of the connecting shaft 21 is provided with a spline groove, and the lead screw 7 of the electric strut is provided with a spline.

[0060] Furthermore, the outer peripheral surface of the damper housing 1 is provided with reinforcing ribs, which can improve the strength of the damper housing 1.

[0061] Furthermore, the reinforcing rib and the damper housing 1 are integrally formed structural components.

[0062] like Figure 5As shown, this utility model provides an electric strut, including the aforementioned damper, strut housing 4, strut body 5, and telescopic unit. The damper housing 1 is installed on the strut housing 4, the strut body 5 is movably installed on the strut housing 4, and the output end of the telescopic unit is fixedly connected to the strut body 5. The telescopic unit is used to drive the strut body 5 to extend and retract along its own axial direction.

[0063] When the vehicle door needs to be opened, the telescopic unit drives the support rod body 5 to extend along its own axis. Under the pushing action of the support rod body 5, the door can be opened, and the support rod body 5 also provides support. When the vehicle door needs to be closed, the telescopic unit drives the support rod body 5 to retract along its own axis. The supporting action of the support rod body 5 disappears, and the door can be closed under the pulling action of the support rod body 5.

[0064] Exemplarily, the telescopic unit includes a drive member 6, a lead screw 7, and a nut. The drive member 6 is mounted on the strut housing 4, and the lead screw 7 is rotatably connected to the strut housing 4. The lead screw 7 extends axially along the strut body 5 and is connected to the output end of the drive member 6. The drive member 6 drives the lead screw 7 to rotate. The lead screw 7 is driveably connected to the connecting shaft 21. The nut is driveably connected to the lead screw 7 and is configured to reciprocate linearly along the axial direction of the strut body 5. The nut is fixed to the strut body 5. Specifically, the drive member 6 is a drive motor.

[0065] For example, the nut is threadedly connected to the lead screw 7 and fixed to the support rod body 5. The output end of the drive member 6 rotates, causing the lead screw 7 to rotate. Since the nut is configured to reciprocate linearly along the axial direction of the support rod body 5, the rotation of the lead screw 7 causes the nut to move along the axial direction of the support rod body 5. The nut then causes the support rod body 5 to move along the axial direction of the support rod body 5, allowing the support rod body 5 to extend and retract, thus facilitating the opening or closing of the vehicle door. In other embodiments, the nut may also be connected to the lead screw 7 via a ball bearing structure.

[0066] Rotating the output end of the drive unit 6 in the forward direction extends the support rod body 5 to push the door open, while rotating the output end of the drive unit 6 in the reverse direction retracts the support rod body 5 to pull the door closed, thus facilitating the opening and closing of the door. The drive mechanism, connected to the damper's connecting shaft 21 via the lead screw 7, effectively buffers the impact force during door movement, resulting in smoother and more stable door movement, reduced noise, and an improved user experience.

[0067] In other embodiments, the drive unit may also be a telescopic cylinder, the output end of which is fixedly connected to the support rod body 5. The output end of the telescopic cylinder extends and retracts along the axial direction of the support rod body 5, and the door can be opened or closed by extending and retracting the output end of the telescopic cylinder.

[0068] All of the above components are located inside the strut housing 4. The strut housing 4 can protect and isolate each component, which not only improves the aesthetics but also ensures the stable operation of each component.

[0069] Furthermore, a protective shell 8 is provided on the outside of the drive component 6. The protective shell 8 is located inside the strut housing 4. Under the dual protection of the strut housing 4 and the protective shell 8, the protection of the drive component 6 is further strengthened, ensuring the working performance of the drive component 6.

[0070] This utility model provides a vehicle, including a vehicle body, a door installed on the vehicle body, and the aforementioned electric strut, which is disposed between the vehicle body and the door. By disposing of the strut assembly between the vehicle body and the door, the noise of the strut assembly during the opening and closing of the door can be reduced, improving the quietness of the vehicle operation and thus enhancing the user's driving experience.

[0071] It should be noted that the electric struts can also be installed between the hood and the vehicle body, which can reduce the noise of the electric struts during the opening and closing of the hood and improve the quietness of the car. This will not be described again here.

[0072] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A damper, characterized in that, include: The damper housing (1) has a receiving cavity; Damping assembly (2), the damping assembly (2) includes a connecting shaft (21) and an elastic element (22) sleeved outside the connecting shaft (21), the connecting shaft (21) and the elastic element (22) are disposed in the receiving cavity, and the elastic element (22) is provided with legs at both ends; A buffer (3) is disposed in the receiving cavity and fixed to the damper housing (1), and both of the legs abut against the buffer (3); or, one of the legs abuts against the damper housing (1) and the other leg abuts against the buffer (3).

2. The damper according to claim 1, characterized in that, The damper housing (1) includes a base (11) and an end cap (12). The base (11) is cylindrical. The end cap (12) is detachably connected to the base (11), and the end cap (12) and the base (11) enclose the receiving cavity. The end cap (12) can be pressed against the connecting shaft (21).

3. The damper according to claim 1, characterized in that, The connecting shaft (21) is fixed relative to the inner wall of the damper housing (1), and the connecting shaft (21) is used for transmission connection with the lead screw (7) of the electric strut.

4. The damper according to claim 3, characterized in that, The inner peripheral wall of the damper housing (1) is provided with a limiting protrusion, and the outer peripheral wall of the connecting shaft (21) is provided with a limiting groove. The limiting protrusion and the limiting groove are engaged in a locking fit.

5. The damper according to claim 4, characterized in that, The limiting protrusion is integrally formed on the damper housing (1).

6. The damper according to claim 3, characterized in that, The connecting shaft (21) can be keyed with the lead screw (7) of the electric strut.

7. The damper according to any one of claims 1-6, characterized in that, The outer circumferential surface of the damper housing (1) is provided with reinforcing ribs.

8. An electric strut, characterized in that, include: The damper as described in any one of claims 1-7; The strut housing (4) is to which the damper housing (1) is mounted; The strut body (5) is movably mounted on the strut housing (4); The telescopic unit is fixedly connected to the support rod body (5) at its output end. The telescopic unit is used to drive the support rod body (5) to extend and retract along its own axis.

9. The electric strut according to claim 8, characterized in that, The telescopic unit includes: A driving component (6) is mounted on the strut housing (4); A lead screw (7) is rotatably connected to the support rod housing (4). The lead screw (7) extends along the axial direction of the support rod body (5). The lead screw (7) is connected to the output end of the drive member (6). The drive member (6) is used to drive the lead screw (7) to rotate. The lead screw (7) is connected to the connecting shaft (21) in a transmission manner. The nut is connected to the lead screw (7) and is configured to reciprocate linearly along the axial direction of the strut body (5). The nut is fixed to the strut body (5).

10. A vehicle, characterized in that, The vehicle includes a vehicle body, a door installed on the vehicle body, and an electric strut as described in claim 8 or 9, wherein the electric strut is disposed between the vehicle body and the door.

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