Automobile electric tail door supporting rod with one-way damping function

Abstract

The utility model relates to the field of automobile accessories, in particular to an automobile electric tail door supporting rod with a one-way damping function, which comprises an outer pipe, an inner pipe, a damper, a one-way bearing, a motor and a transmission assembly, the inner pipe at least partially penetrates through the interior of the outer pipe in a sliding manner; the motor is connected with the inner pipe through the transmission assembly and used for driving at least partial rotation of the transmission assembly so as to drive the inner pipe to stretch out and draw back relative to the outer pipe. The rotating part of the transmission assembly is connected with the damper through a one-way bearing, and the one-way bearing is configured in the mode that when the inner pipe shrinks relative to the outer pipe, the transmission assembly drives the damper to rotate. The problem that due to the fact that a damper provides damping torque in two directions, motor loss is too fast is solved.

Description

Technical Field

[0001] The present application relates to the field of automobile accessories, and in particular to an automobile electric tailgate support rod with a one-way damping function. Background Art

[0002] The electric tailgate strut of a car is used to drive the tailgate to open or close. The damper in the electric tailgate strut is used to provide damping force during the opening and closing process of the tailgate, making the opening and closing of the tailgate smoother and safer.

[0003] Among them, the damper is required to provide a damping torque during the closing process of the car tailgate, so that the tailgate meets the requirement of hovering during the closing process; however, sometimes the damper is not required to provide a damping torque during the opening process of the car tailgate.

[0004] However, the damper of the current electric tailgate support rod is a bidirectional damper, that is, the car tailgate provides damping torque in both directions during closing and opening. This causes the drive motor inside the electric tailgate support rod to consume more electricity when driving the electric tailgate support rod to extend and retract, accelerating the loss of the motor. Utility Model Content

[0005] In order to solve the problem of excessive motor loss caused by the damper providing damping torque in both directions, the present application provides a car electric tailgate support rod with a unidirectional damping function.

[0006] The present application provides an electric tailgate support rod for an automobile with a one-way damping function, which adopts the following technical solution:

[0007] An automobile electric tailgate support rod with a one-way damping function comprises an outer tube, an inner tube, a damper, a one-way bearing, a motor and a transmission assembly;

[0008] The inner tube is at least partially slidably disposed inside the outer tube;

[0009] The motor is connected to the inner tube via the transmission assembly, and the motor is used to drive at least a partial rotation of the transmission assembly to drive the inner tube to extend and retract relative to the outer tube;

[0010] The rotating part of the transmission assembly is connected to the damper through the one-way bearing, and the one-way bearing is configured such that when the inner tube contracts relative to the outer tube, the transmission assembly drives the damper to rotate.

[0011] By adopting the above solution, when the inner tube extends relative to the outer tube, the motor drives the transmission assembly to rotate at least partially in the forward direction. At this time, the rotation direction of the transmission assembly satisfies: the transmission assembly cannot drive the damper to rotate through the one-way bearing, and the damper does not provide a damping torque, thereby reducing the loss of the motor; when the inner tube contracts relative to the outer tube, the motor drives the transmission assembly to rotate at least partially in the reverse direction, and the transmission assembly can drive the damper to rotate through the one-way bearing, and the damper provides a damping torque.

[0012] Optionally, the transmission assembly includes a screw rod, a support tube and a bearing bushing;

[0013] The screw rod is connected to the motor, the support tube is sleeved on the screw rod and threadedly connected to the screw rod, and one end of the support tube is connected to the end of the inner tube away from the outer tube;

[0014] The bearing bushing is sleeved on the screw rod, and the one-way bearing is sleeved on the bearing bushing.

[0015] By adopting this solution, the motor drives the screw to rotate, thereby driving the support tube to move, thereby achieving the extension and retraction of the electric tailgate support with a one-way damping function. The one-way bearing is mounted on the bearing bushing. The forward and reverse rotation of the screw drives the inner ring of the one-way bearing to rotate forward and reverse, causing the damper to follow the outer ring of the one-way bearing to remain stationary or rotate. This ensures that the damper does not provide damping torque when the electric tailgate support is extended, but provides damping torque when it is retracted.

[0016] Optionally, the transmission assembly further includes a limiting member, which is connected to the bearing sleeve and is used to limit the one-way bearing.

[0017] By adopting the above solution, the limiting member can prevent the one-way bearing from being separated from the bearing bushing.

[0018] Optionally, the transmission assembly further includes a bearing seat and a bidirectional bearing, the bearing seat is connected to the inner wall of the outer tube, the bidirectional bearing is sleeved on the bearing sleeve, and the outer ring of the bidirectional bearing is connected to the bearing seat.

[0019] By adopting the above solution, the screw rod can indirectly abut against the inner wall of the outer tube, thereby reducing the abnormal swing amplitude of the screw rod during rotation.

[0020] Optionally, the electric tailgate support rod for automobile with a one-way damping function further includes a sealing assembly, and the sealing assembly includes a screw seal ring, a screw support ring and a sealing gasket;

[0021] The screw rod sealing ring is sleeved on the screw rod, and the screw rod support ring is sleeved on the screw rod sealing ring;

[0022] The sealing gasket is abutted and connected to the screw rod support ring, and the outer peripheries of the sealing gasket and the screw rod support ring are both abutted against the inner wall of the outer tube.

[0023] By adopting the above solution, the screw support ring can limit the screw and reduce the swing amplitude of the screw during rotation. The screw seal ring and sealing gasket can achieve a sealing effect, and play a role in waterproofing and preventing dirt.

[0024] Optionally, a first limiting protrusion is provided on the outer circumference of the screw support ring;

[0025] The sealing gasket is sleeved on the screw support ring, and one side of the sealing gasket abuts against the first limiting protrusion.

[0026] By adopting the above solution, the inner side and one side surface of the sealing gasket are both against other components, and the sealing ring can fully play a sealing effect.

[0027] Optionally, the inner side of the outer tube is provided with a step;

[0028] The automobile electric tailgate support rod with a one-way damping function also includes a spring bushing and a spring. A second limiting protrusion is provided on the outer peripheral wall of one end of the spring bushing, and the second limiting protrusion is connected to the step. The spring is sleeved on the spring bushing, and the opposite ends of the spring are respectively connected to the second limiting protrusion and the inner tube.

[0029] By adopting the above solution, the spring can be deformed when the electric tailgate support rod of the car is extended and retracted, and the spring can play a role of buffering and shock absorption. The spring can also bear a certain load and provide a certain amount of assistance when the car tailgate is opened.

[0030] Optionally, the sealing assembly is arranged on the inner side of the step, and the side of the sealing gasket facing away from the first limiting protrusion abuts against the second limiting protrusion.

[0031] By adopting the above solution, the inner ring, the outer ring and the two opposite side surfaces of the sealing gasket are all in contact with other components, thereby achieving a better sealing effect.

[0032] The present application drives the inner tube to extend and retract through a motor and a transmission assembly. The rotating part of the transmission assembly is connected to the damper through a one-way bearing, so that when the inner tube extends outward, the inner ring and outer ring of the one-way bearing can rotate relative to each other, and the rotational motion of the transmission assembly will not be transmitted to the damper, and the damper will not provide a damping torque; when the inner tube retracts, the inner ring and outer ring of the one-way bearing cannot rotate relative to each other, and the rotational motion of the transmission assembly can be transmitted to the damper, and the damper will work and provide a damping torque, effectively solving the problem of excessive motor loss caused by the damper providing damping torque in both directions. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a cross-sectional view of the automobile electric tailgate support rod with a one-way damping function provided by the present application.

[0034] Figure 2 This application provides Figure 1 A magnified schematic diagram of point A in FIG.

[0035] Figure 3 This is an exploded schematic diagram of the automobile electric tailgate support rod with a one-way damping function provided by the present application.

[0036] Figure 4 It is a structural schematic diagram of a sealing assembly of an automobile electric tailgate support rod with a one-way damping function provided by the present application.

[0037] Description of reference numerals:

[0038] 1. Outer tube; 2. Inner tube; 3. Damper; 4. One-way bearing; 5. Motor;

[0039] 6. Transmission assembly; 61. Screw; 62. Support tube; 63. Bearing bushing; 64. Bearing seat; 65. Bidirectional bearing;

[0040] 7. First joint; 8. Second joint; 9. First buffer sleeve; 10. Second buffer sleeve; 11. Damping bushing; 12. Limiting member;

[0041] 13. Sealing assembly; 131. Screw sealing ring; 132. Screw support ring; 1321. First limiting protrusion; 133. Sealing gasket;

[0042] 14. Spring bushing; 141. Second limiting protrusion; 15. Spring; 16. Waterproof tube. DETAILED DESCRIPTION

[0043] The following is combined with Figures 1 to 4 This application is described in further detail.

[0044] like Figure 1 and Figure 3 As shown, the embodiment of the present application discloses an electric tailgate support rod for an automobile with a one-way damping function, comprising: an outer tube 1, an inner tube 2, a damper 3, a one-way bearing 4, a motor 5 and a transmission assembly 6;

[0045] The inner tube 2 is at least partially slidably disposed inside the outer tube 1;

[0046] The motor 5 is connected to the inner tube 2 via the transmission assembly 6. The motor 5 is used to drive at least a portion of the transmission assembly 6 to rotate, thereby driving the inner tube 2 to extend and retract relative to the outer tube 1.

[0047] The rotating part of the transmission assembly 6 is connected to the damper 3 via a one-way bearing 4 . The one-way bearing 4 is configured such that when the inner tube 2 contracts relative to the outer tube 1 , the transmission assembly 6 drives the damper 3 to rotate.

[0048] Specifically, the outer tube 1 and the inner tube 2 are provided with a first joint 7 and a second joint 8 at one end away from each other, respectively. The first joint 7 and the second joint 8 are used to connect the opposite ends of the automobile electric tailgate support rod with a one-way damping function with other components.

[0049] The motor 5 and the damper 3 are both arranged in the outer tube 1, and the first joint 7, the motor 5 and the damper 3 are arranged in sequence. A first buffer sleeve 9 is provided between the first joint 7 and the motor 5, and a second buffer sleeve 10 is provided between the motor 5 and the damper 3. The first buffer sleeve 9 and the second buffer sleeve 10 are used to play a buffering and shock-absorbing role.

[0050] The motor 5 can drive at least a partial rotation of the transmission assembly 6 , and the transmission assembly 6 has the function of converting the rotational motion of the motor 5 into a linear motion, so that the transmission assembly 6 can drive the inner tube 2 to extend and retract.

[0051] One of the inner ring and the outer ring of the one-way bearing 4 is connected to the rotating part of the transmission assembly 6 , and the other is connected to the damper 3 .

[0052] During the opening process of the car tailgate, the inner tube 2 gradually extends out of the outer tube 1, and the motor 5 drives at least part of the transmission assembly 6 to rotate in the forward direction. At this time, the inner ring and the outer ring of the one-way bearing 4 can rotate relative to each other, so the rotational motion of the transmission assembly 6 will not be transmitted to the damper 3, and the damper 3 will not work and provide damping torque.

[0053] During the closing process of the car tailgate, the inner tube 2 gradually retracts into the outer tube 1, and the motor 5 drives the transmission assembly 6 to rotate at least partially in the reverse direction (it should be noted that forward rotation and reverse rotation only indicate the opposite direction of rotation and do not refer to the specific direction of rotation or other meanings). At this time, the inner ring and outer ring of the one-way bearing 4 cannot rotate relative to each other, so the rotational motion of the transmission assembly 6 can be transmitted to the damper 3, and the damper 3 will work and provide a damping torque.

[0054] The present application drives the inner tube 2 to extend and retract through the motor 5 and the transmission assembly 6. The rotating part of the transmission assembly 6 is connected to the damper 3 through the one-way bearing 4, so that when the inner tube 2 extends outward, the inner ring and the outer ring of the one-way bearing 4 can rotate relative to each other, and the rotational motion of the transmission assembly 6 will not be transmitted to the damper 3, and the damper 3 will not provide a damping torque; when the inner tube 2 retracts, the inner ring and the outer ring of the one-way bearing 4 cannot rotate relative to each other, and the rotational motion of the transmission assembly 6 can be transmitted to the damper 3, and the damper 3 will work and provide a damping torque, which effectively solves the problem of excessive wear and tear of the motor 5 caused by the damping torque provided by the damper 3 in both directions.

[0055] like Figure 1 and Figure 3 As shown, in some embodiments, the transmission assembly 6 includes a screw rod 61, a support tube 62 and a bearing bushing 63; the screw rod 61 is connected to the motor 5, the support tube 62 is sleeved on the screw rod 61 and threadedly connected to the screw rod 61, and one end of the support tube 62 is connected to the end of the inner tube 2 away from the outer tube 1; the bearing bushing 63 is sleeved on the screw rod 61, and the one-way bearing 4 is sleeved on the bearing bushing 63.

[0056] Specifically, the bearing bushing 63 is connected to the screw rod 61 through a spline fit, so that when the motor 5 drives the screw rod 61 to rotate, the bearing bushing 63 rotates synchronously with the screw rod 61, further rotating the inner ring of the one-way bearing 4.

[0057] The support tube 62 is threadedly connected to the screw rod 61 , so when the screw rod 61 rotates, the support tube 62 can move along the axial direction of the screw rod 61 and drive the inner tube 2 to expand and contract.

[0058] The length of the support tube 62 satisfies the requirement that the support tube 62 can be connected to the end of the inner tube 2 away from the outer tube 1 , so that the support tube 62 can limit the inner tube 2 and prevent the inner tube 2 from deviating in direction after being extended.

[0059] In some embodiments, the damper 3 includes a damper body and a housing, and the housing is connected to the inner wall of the outer tube 1. The damper body and the housing are rotatably connected. When the damper 3 is working, only the damper body rotates and provides damping torque.

[0060] The electric tailgate support rod of the automobile with a one-way damping function further includes a damping bushing 11 , and the damper body is connected to the outer ring of the one-way bearing 4 through the damping bushing 11 .

[0061] like Figure 2 and Figure 3 As shown, in some embodiments, the transmission assembly 6 also includes a bearing seat 64 and a bidirectional bearing 65, the bearing seat 64 is connected to the inner wall of the outer tube 1, the bidirectional bearing 65 is sleeved on the bearing sleeve 63, and the outer ring of the bidirectional bearing 65 is connected to the bearing seat 64.

[0062] Specifically, the bearing seat 64 is provided with a mounting hole for setting the bidirectional bearing 65. The inner ring and outer ring of the bidirectional bearing 65 are respectively abutted against the bearing sleeve 63 and the bearing seat 64, so that the bearing seat 64 and the bidirectional bearing 65 can provide support for the screw rod 61 to prevent the screw rod 61 from swinging abnormally during rotation.

[0063] The bearing seat 64 is plugged into the housing of the damper 3 , and the damping bushing 11 , the one-way bearing 4 , the two-way bearing 65 and the bearing bushing 63 are all located on the inner side of the bearing seat 64 , making the structure more compact.

[0064] like Figure 2and Figure 3 As shown, in some embodiments, the transmission assembly 6 further includes a limiting member 12 , which is connected to the bearing bushing 63 , and is used to limit the one-way bearing 4 .

[0065] Specifically, the limiting member 12 may be a retaining spring, which is clamped on the bearing bushing 63 to prevent the one-way bearing 4 from being separated from the bearing bushing 63 .

[0066] like Figures 3 and 4 As shown, in some embodiments, the electric tailgate support rod of an automobile with a one-way damping function also includes a sealing assembly 13, which includes a screw seal ring 131, a screw support ring 132 and a sealing gasket 133; the screw seal ring 131 is sleeved on the screw 61, and the screw support ring 132 is sleeved on the screw seal ring 131; the sealing gasket 133 abuts against the screw support ring 132, and the outer peripheries of the sealing gasket 133 and the screw support ring 132 abut against the inner wall of the outer tube 1.

[0067] Specifically, the screw support ring 132 abuts against the inner wall of the outer tube 1, so that the screw seal ring 131 and the screw support ring 132 can limit the screw 61 and prevent abnormal swing of the screw 61. In addition, the screw seal ring 131 can also play a certain waterproof sealing effect.

[0068] A first stopper protrusion 1321 is provided on the outer circumference of the screw support ring 132. A sealing gasket 133 is sleeved over the screw support ring 132, with one side of the sealing gasket 133 abutting against the first stopper protrusion 1321. By arranging the inner side, outer side, and side surface of the sealing gasket 133 to abut against different components, the sealing gasket 133 can seal multiple locations simultaneously.

[0069] like Figure 2 and Figure 3 As shown, in some embodiments, a step is provided on the inner side of the outer tube 1; the automobile electric tailgate support rod with a one-way damping function also includes a spring bushing 14 and a spring 15, and a second limiting protrusion 141 is provided on the outer peripheral wall of one end of the spring bushing 14, and the second limiting protrusion 141 is connected to the step, and the spring 15 is sleeved on the spring bushing 14, and the opposite ends of the spring 15 are respectively connected to the second limiting protrusion 141 and the inner tube 2.

[0070] Specifically, the spring 15 is sleeved on the spring bushing 14, so that the spring bushing 14 can limit the position of the spring 15. The screw rod 61 passes through the inner side of the spring bushing 14, and the support tube 62 threadedly connected to the screw rod 61 passes through the inner side of the spring 15, so that the support tube 62 can also limit the position of the spring 15.

[0071] When the inner tube 2 expands and contracts, the spring 15 also deforms accordingly. The spring 15 can play the role of buffering and shock absorption, and the spring 15 can bear a certain load and provide a certain boost when the car tailgate is opened.

[0072] like Figure 1 and Figure 3 As shown, in some embodiments, the sealing assembly 13 is positioned on the inner side of the step, thereby providing a good sealing effect at the step. The second limiting protrusion 141 partially abuts the step, while the other part abuts the side of the sealing gasket 133 facing away from the first limiting protrusion 1321. As a result, the inner ring, outer ring, and two opposite side surfaces of the sealing gasket 133 all abut against other components, thereby improving the sealing effect.

[0073] like Figure 1 and Figure 3 As shown, in some embodiments, the electric tailgate support rod of the automobile with a one-way damping function further includes a waterproof tube 16, which is sleeved on the wiring harness that supplies power to the motor 5, thereby achieving waterproofing and preventing the wiring harness from being damaged.

Claims

1. A car electric tailgate support rod with a one-way damping function, characterized in that: include: An outer tube (1), an inner tube (2), a damper (3), a one-way bearing (4), a motor (5) and a transmission assembly (6); The inner tube (2) is at least partially slidably arranged inside the outer tube (1); The motor (5) is connected to the inner tube (2) via the transmission assembly (6), and the motor (5) is used to drive at least a portion of the transmission assembly (6) to rotate, thereby driving the inner tube (2) to extend and retract relative to the outer tube (1); The rotating part of the transmission assembly (6) is connected to the damper (3) via the one-way bearing (4), and the one-way bearing (4) is configured such that when the inner tube (2) contracts relative to the outer tube (1), the transmission assembly (6) drives the damper (3) to rotate.

2. The electric tailgate support rod with one-way damping function for automobiles according to claim 1, characterized in that: The transmission assembly (6) includes a screw rod (61), a support tube (62) and a bearing bushing (63); The screw rod (61) is connected to the motor (5), the support tube (62) is sleeved on the screw rod (61) and threadedly connected to the screw rod (61), and one end of the support tube (62) is connected to an end of the inner tube (2) away from the outer tube (1); The bearing bushing (63) is sleeved on the screw rod (61), and the one-way bearing (4) is sleeved on the bearing bushing (63).

3. The electric tailgate support rod with one-way damping function for automobiles according to claim 2, characterized in that: The transmission assembly (6) further includes a limiting member (12), the limiting member (12) being connected to the bearing bushing (63), and the limiting member (12) being used to limit the one-way bearing (4).

4. The electric tailgate support rod with one-way damping function for automobiles according to claim 2, characterized in that: The transmission assembly (6) further includes a bearing seat (64) and a bidirectional bearing (65), wherein the bearing seat (64) is connected to the inner side wall of the outer tube (1), the bidirectional bearing (65) is sleeved on the bearing bushing (63), and the outer ring of the bidirectional bearing (65) is connected to the bearing seat (64).

5. The electric tailgate support rod with one-way damping function for automobiles according to claim 2, characterized in that: The automobile electric tailgate support rod with a one-way damping function further comprises a sealing assembly (13), wherein the sealing assembly (13) comprises a screw sealing ring (131), a screw support ring (132) and a sealing gasket (133); The screw rod sealing ring (131) is sleeved on the screw rod (61), and the screw rod support ring (132) is sleeved on the screw rod sealing ring (131); The sealing gasket (133) abuts against the screw support ring (132), and the outer peripheries of the sealing gasket (133) and the screw support ring (132) abut against the inner wall of the outer tube (1).

6. The electric tailgate support rod with one-way damping function for automobiles according to claim 5, characterized in that: A first limiting protrusion (1321) is provided on the outer periphery of the screw rod support ring (132); The sealing gasket (133) is sleeved on the screw support ring (132), and one side of the sealing gasket (133) abuts against the first limiting protrusion (1321).

7. The electric tailgate support rod with one-way damping function for automobiles according to claim 6, characterized in that: The inner side of the outer tube (1) is provided with a step; The electric tailgate support rod for an automobile with a one-way damping function further comprises a spring bushing (14) and a spring (15), wherein a second limiting protrusion (141) is provided on the outer peripheral wall of one end of the spring bushing (14), and the second limiting protrusion (141) is connected to the step, and the spring (15) is sleeved on the spring bushing (14), and the opposite ends of the spring (15) are respectively connected to the second limiting protrusion (141) and the inner tube (2).

8. The electric tailgate support rod with one-way damping function for automobiles according to claim 7, characterized in that: The sealing assembly (13) is arranged on the inner side of the step, and the side of the sealing gasket (133) facing away from the first limiting protrusion (1321) abuts against the second limiting protrusion (141).

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