Electric tailgate strut for automobile

Abstract

The electric tailgate strut for automobiles, comprehensive Telescopic rod consisting of an outer tube and an inner tube, wherein the outer tube can move along the axial direction of the inner tube, Gas spring arranged inside the telescopic rod and consisting of the threaded tube with thread on the outer wall, the piston rod and the piston, wherein the distance between the piston rod and the inner tube remains constant, wherein the piston is located at the free end of the piston rod and is in a sliding fit with the inner wall of the threaded tube, and wherein the sealing guide assembly is provided between the threaded tube and the piston rod. Nut that is adapted to the threaded pipe and positioned at the end of the inner pipe, A drive unit that is fixedly arranged in the outer tube and serves to rotate the threaded tube, so that the threaded tube drives the outer tube to move along the axial direction of the inner tube, and Tailgate attachment part located at both ends of a telescopic pole and used to connect the telescopic pole to the tailgate.

Description

TECHNICAL AREA

[0001] The present utility model relates to the technical field of tailgate struts, in particular to electric tailgate struts for automobiles. TECHNICAL BACKGROUND

[0002] Car tailgate opening and closing systems are generally divided into two types: electric and manual. The electric tailgate opening and closing system can be divided into the following two configurations: First, two electric struts (PR) are installed on the left and right sides of the tailgate, respectively. This configuration can be represented by "PR+PR" (PR is a product that uses a motor to drive a screw drive mechanism to achieve expansion and compression). Second, an electric strut (PR) and a pneumatic balance strut (FEBI) are installed on the left and right sides of the tailgate, respectively. This configuration can be represented by "PR+FEBI" (FEBI is a product with an electric strut appearance and a traditional gas spring inside).

[0003] Since conventional electric struts generally lack a damping structure, the tailgate tends to wobble when the electric struts are raised or lowered when using the "PR+PR" configuration, which negatively impacts the user experience. However, adopting the "PR+FEBI" configuration significantly improves the smoothness of opening or closing the tailgate. However, the performance enhancement is not sufficient for some large vehicles with large tailgate masses, such as off-road vehicles, when using a single electric strut. DETAILED DESCRIPTION

[0004] In order to solve problems existing in the state of the art, the present utility model proposes the electric tailgate strut for automobiles.

[0005] To achieve the above-mentioned purpose, the present utility model adopts the following technical solutions: The electric tailgate strut for automobiles, comprising Telescopic rod consisting of outer tube and inner tube, whereby the outer tube can move along the axial direction of the inner tube, Gas spring arranged within the telescopic rod and consisting of the threaded tube with thread on the outer wall, the piston rod and the piston, wherein the distance between the piston rod and the inner tube remains constant, wherein the piston is located at the free end of the piston rod and is in sliding fit with the inner wall of the threaded tube, and wherein a seal guide assembly is provided between the threaded tube and the piston rod, Nut which is adapted to the threaded pipe and arranged at the end of the inner pipe, drive unit which is fixedly arranged in the outer pipe and serves to drive the threaded pipe in rotation, so that the threaded pipe drives the outer pipe to move along the axial direction of the inner pipe, and Tailgate connection part that is located at both ends of a telescopic rod and serves to connect the telescopic rod to the tailgate.

[0006] Preferably, there is no self-locking between the nut and the threaded tube. Preferably, the nut serves to limit the circumferential position of the telescopic rod such that circumferential movement between the outer tube and the inner tube is impossible, wherein the inner wall of the outer tube is provided with the evenly distributed first grooves along its axis, wherein the inner wall of the inner tube is provided with the evenly distributed second grooves along its axis, wherein the outer wall of the nut is provided with the first convex strip adapted to the first groove and the second convex strip adapted to the second groove.

[0007] Preferably, the drive unit comprises a motor, a gear box and a controller, wherein the output end of the motor drives the threaded tube for rotation through the gear box.

[0008] Preferably, the end of the inner tube is provided with the inner tube plug which is connected to the end of the piston rod, wherein the side wall of the inner tube plug is firmly connected to the inner wall of the inner tube.

[0009] Preferably, the third convex strip is provided on the side wall of the inner tube plug, which is adapted to the second groove.

[0010] Preferably, outer pipe plug is fixedly installed at the end of the outer pipe, wherein power line opening is provided at the end or side of the outer pipe plug, and wherein side wall of the outer pipe plug is provided with fourth convex stripe adapted to first groove.

[0011] Preferably, the seal guide assembly comprises a spacer sleeve, an oil seal, and a rear upper sleeve, with the oil seal located between the spacer sleeve and the rear upper sleeve, and the rear upper sleeve being rigidly connected to the end of the threaded tube. Preferably, the tailgate connection part is a ball socket or ball head, with at least one end of the connection part being rotatable on the telescopic rod.

[0012] Preferably, the protective cover comprises the outer tube protective cover provided at the end of the outer tube and the inner tube protective cover provided at the end of the inner tube.

[0013] The present utility model has the following advantages: 1. In the electric tailgate strut for automobiles, the motor drives the threaded tube to rotate, allowing the outer tube to move along the axis of the inner tube, thus achieving the strut's ascent or descent. The threaded tube itself, together with the piston rod and piston, forms a gas spring, thus significantly improving the smoothness of the tailgate opening or closing. Furthermore, when the electric tailgate strut for automobiles is extended, the gas spring has a certain output force, which, under the same conditions, can reduce the load on the motor and increase the thrust. 2. In the electric tailgate strut for automobiles, the threaded tube, piston rod, and piston form a non-self-locking gas spring. By controlling the rotation of the motor, the rotation of the threaded tube can be limited, automatic locking of the gas spring can be achieved, and the stability of the electric tailgate strut for automobiles can be improved. 3. Both the end of the outer tube and the end of the inner tube are provided with the protective cover, which can act waterproof and dustproof. DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic three-dimensional structural diagram of the electric tailgate stay for automobile of the present utility model. Fig. 2 is the schematic front view of the structure of the electric tailgate stay for automobile of the present utility model. Fig. Figure 3 is a schematic cross-sectional structure diagram of AA in Fig. 2 of the electric tailgate strut for automobile of the present utility model. Fig. 4 is a schematic three-dimensional structural diagram of the outer tube of the electric tailgate stay for automobile of the present utility model. Fig. 5 is a schematic three-dimensional structural diagram of the inner tube of the electric tailgate stay for automobile of the present utility model. Fig. 6 is a schematic three-dimensional structural diagram of the nut of the electric tailgate stay for automobile of the present utility model. Fig. 7 is a schematic three-dimensional structural diagram of the inner tube plug of the electric tailgate stay for automobile of the present utility model. Fig. 8 is a schematic three-dimensional structural diagram of the outer tube plug of the electric tailgate stay for automobile of the present utility model. Description of the main components:

[0014] 1. Outer tube; 2. Inner tube; 3. Threaded tube, 4. Motor; 5. Gear box; 6. Double ear back plug; 7. Nut; 8. Piston; 9. Piston rod; 10. Spacer sleeve; 11. Oil seal; 12. Rear upper sleeve; 13. Inner tube plug; 14. Bearing; 15. Tube plug plugged cover; 16. Outer tube protective cover; 17. First ball socket; 18. Outer tube plug; 19. Inner tube protective cover; 20. Pin shaft; 101. First groove; 201. Second groove; 701. First convex strip; 702. Second convex strip; 131. Third convex strip; 132. Second ball socket; 181. Fourth convex strip. SPECIFIC EMBODIMENTS

[0015] Below, the technical solutions in the embodiments of the present utility model are described clearly and comprehensively with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present utility model, but not all embodiments.

[0016] With reference to Fig. 1 to 8, the electric tailgate strut for the automobile includes the following: Telescopic rod consisting of outer tube 1 and inner tube 2, wherein the outer tube 1 can move along the axial direction of the inner tube 2, Gas spring arranged within the telescopic rod and consisting of a threaded tube 3 with a thread on the outer wall, a piston rod 9, and a piston 8, wherein the distance between the piston rod 9 and the inner tube 2 remains constant, wherein the piston 8 is located at the free end of the piston rod 9 and is in sliding contact with the inner wall of the threaded tube 3, and wherein a seal guide assembly is provided between the threaded tube 3 and the piston rod 9, a nut 7 adapted to the threaded tube 3 and arranged at the end of the inner tube 2, a drive unit fixedly arranged in the outer tube 1 and serving to rotate the threaded tube 3 so that the threaded tube 3 drives the outer tube 1 to move along the axial direction of the inner tube 2, and Tailgate connection part that is located at both ends of a telescopic rod and serves to connect the telescopic rod to the tailgate.

[0017] The nut 7 serves to limit a circumferential position of the telescopic rod so that the circumferential movement between the outer tube 1 and the inner tube 2 is impossible, wherein the inner wall of the outer tube 1 is provided along its axis with evenly distributed first grooves 101, wherein the outer wall of the inner tube 2 is provided along its axis with evenly distributed second grooves 201, wherein the outer wall of the nut 7 is provided with the first convex strip 701 adapted to the first groove 101 and the second convex strip 702 adapted to the second groove 201.

[0018] The drive unit includes the motor 4, the gear box 5, and the controller. The output end of the motor 4 drives the threaded tube 3 for rotation through the gear box 5. The gear box 5 is the planetary reduction gear box. The controller includes the Hall encoder or other signal feedback unit. The end of the threaded tube 3 is equipped with a double-ear back plug 6. The double-ear back plug 6 is connected to the output shaft of the gear box 5 via a pin shaft 20. The output end of the gear box 5 can also be connected to the end of the threaded tube 3 via a coupling.

[0019] The end of the inner tube 2 is provided with an inner tube plug 13, which is connected to the end of the piston rod 9. The side wall of the inner tube plug 13 is firmly connected to the inner wall of the inner tube 2. A bearing 14 is installed between the inner tube plug 13 and the piston rod 9, and a plugged cover of the inner tube plug 15 is also firmly mounted on the inner tube plug 13 to axially limit the bearing 14.

[0020] The side wall of the inner tube plug 13 is provided with the third convex strip 131, which coincides with the second groove 201. The second groove 201 cooperates with the third convex strip 131 to limit circumferential movement of the inner tube plug 13.

[0021] An outer tube plug 18 is fixedly provided at the end of the outer tube 1. The side wall of the outer tube plug 18 is provided with a fourth convex strip 181 that aligns with the first groove 101. The first groove 101 cooperates with the fourth convex strip 181 to limit circumferential rotation of the outer tube plug 18.

[0022] Seal guide assembly includes spacer sleeve 10, oil seal 11 and rear upper sleeve 12, wherein oil seal 11 is located between the spacer sleeve 10 and the rear upper sleeve 12, and wherein the rear upper sleeve 12 is fixedly connected to the end of the threaded tube 3.

[0023] The tailgate connection part is the ball socket or ball head, and at least one end of the connecting part on the telescopic rod is rotatable.

[0024] If the tailgate connection part is a ball socket, the ball socket comprises the first ball socket 17, which is connected to the outer tube plug 18, and the second ball socket 132, which is connected to the inner tube plug 13. The ball socket is rotatable in the circumferential direction at at least one end of the telescopic rod.

[0025] It also includes a protective cover. The protective cover includes the outer tube protective cover 16, which is provided at the end of the outer tube 1. The outer tube protective cover 16 is provided at both ends of the outer tube 1, and the inner tube protective cover 19 is provided at the end of the inner tube 2.

[0026] In the electric tailgate strut for automobiles, the motor 4 drives the threaded tube 3 to rotate, allowing the outer tube 1 to move along the axis of the inner tube 2, thus enabling the strut to ascend or descend. The threaded tube 3 itself, together with the piston rod 9 and the piston 8, forms the gas spring, thus significantly improving the smoothness of the tailgate opening and closing. Furthermore, when the gas spring is extended, the electric tailgate strut for automobiles has a certain initial force, which can reduce the load on the motor 4 and increase the thrust force under identical conditions.

[0027] In the electric tailgate strut for automobiles, the threaded tube 3, piston rod 9, and piston 8 form a non-self-locking gas spring. By controlling the rotation of the motor 4, the rotation of the threaded tube 3 can be limited, the automatic locking of the gas spring can be realized, and the stability of the electric tailgate strut for automobiles can be improved.

[0028] Both the end of the outer tube 1 and the end of the inner tube 2 are provided with the protective cover, which can act waterproof and dustproof.

[0029] Although embodiments of the present utility model are described with reference to the accompanying drawings as shown above, those skilled in the art in the technical field to which the present utility model belongs will understand that the present utility model can be embodied in other specific forms without departing from the principle and spirit of the utility model. Various changes, modifications, substitutions, and transformations to these embodiments are intended to be included within the scope of the present utility model.

Claims

[1] The electric tailgate strut for automobile, comprising Telescopic rod consisting of outer tube and inner tube, whereby the outer tube can move along the axial direction of the inner tube, Gas spring arranged within the telescopic rod and consisting of the threaded tube with thread on the outer wall, the piston rod and the piston, wherein the distance between the piston rod and the inner tube remains constant, wherein the piston is located at the free end of the piston rod and is in sliding fit with the inner wall of the threaded tube, and wherein the seal guide assembly is provided between the threaded tube and the piston rod, Nut adapted to the threaded pipe and located at the end of the inner pipe, Drive unit which is fixedly arranged in the outer tube and serves to drive the threaded tube in rotation, so that the threaded tube drives the outer tube to move along the axial direction of the inner tube, and Tailgate connection part that is located at both ends of a telescopic rod and serves to connect the telescopic rod to the tailgate. [2] Electric tailgate strut for automobile according to claim 1, characterized by that there is no self-locking between the nut and the threaded pipe. [3] Electric tailgate strut for automobile according to claim 2, characterized by that nut serves to limit the circumferential position of the telescopic rod so that circumferential movement between the outer tube and the inner tube is impossible, whereby The inner wall of the outer tube is provided along its axis with the evenly distributed first grooves, the inner wall of the inner tube being provided along its axis with the evenly distributed second grooves, the outer wall of the nut being provided with the first convex strip adapted to the first groove and the second convex strip adapted to the second groove. [4] Electric tailgate strut for automobile according to claim 1, characterized by that the drive unit comprises a motor, a gearbox and a control system, with the output end of the motor driving the threaded tube to rotate through the gearbox. [5] Electric tailgate strut for automobile according to claim 3, characterized by that end of the inner tube is provided with the inner tube plug which is connected to the end of the piston rod, wherein the side wall of the inner tube plug is firmly connected to the inner wall of the inner tube. [6] Electric tailgate strut for automobile according to claim 5, characterized by that the third convex strip is provided on the side wall of the inner tube plug which is adapted to the second groove. [7] Electric tailgate strut for automobile according to claim 6, characterized bythat outer pipe plug is fixedly installed at the end of the outer pipe, wherein at the end or side of the outer pipe plug power line opening is provided, and wherein the side wall of the outer pipe plug is provided with the fourth convex strip which is adapted to the first groove. [8] Electric tailgate strut for automobile according to one of claims 1 to 7, characterized by that the seal guide assembly comprises a spacer sleeve, an oil seal, and a rear upper sleeve, the oil seal being located between the spacer sleeve and the rear upper sleeve, and the rear upper sleeve being fixedly connected to the end of the threaded tube. [9] Electric tailgate strut for automobile according to claim 8, characterized by that the tailgate connection part is the ball socket or the ball head, whereby at least one end of the connecting part on the telescopic rod is rotatable. [10] Electric tailgate strut for automobile according to claim 9, characterized by that the protective cover comprises the outer tube protective cover provided at the end of the outer tube and the inner tube protective cover provided at the end of the inner tube.

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