Electric tailgate strut

Abstract

The electric tailgate strut, including 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 inner wall, the piston rod and the piston, wherein the distance between the threaded tube and the inner tube remains constant, wherein the piston is located at the free end of the piston rod and is in a rotary fit with the inner wall of the threaded tube, and wherein a sealing guide assembly is provided between the threaded tube and the piston rod. A drive unit that is fixedly arranged in the outer tube and serves to rotate the piston rod, so that the piston rod 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 the tailgate strut, in particular the electric tailgate strut. TECHNICAL BACKGROUND

[0002] Car tailgate opening and closing systems are generally divided into two types: electric and manual. Electric tailgate opening and closing systems can be further divided into two configurations: First, two electric struts (PR) are installed, one on the left and one on the right side of the tailgate. This configuration can be represented as "PR+PR" (PR is a component that uses a motor to drive a screw mechanism for expansion and compression). Second, an electric strut (PR) and a pneumatic compensating strut (FEBI) are installed, one on the left and one on the right side of the tailgate. This configuration can be represented as "PR+FEBI" (FEBI is a component that combines the appearance of an electric strut with a traditional gas spring internally).

[0003] Since conventional electric struts typically lack a damping structure, the tailgate tends to wobble when the electric struts are raised or lowered using the "PR+PR" configuration plan, negatively impacting the user experience. However, using the "PR+FEBI" configuration plan significantly improves the smoothness of opening and closing the tailgate. Nevertheless, the performance increase may not be sufficient for some large vehicles with significant tailgate mass, such as SUVs, when using the single electric strut. DETAILED DESCRIPTION

[0004] To solve existing problems in the prior art, the present utility model proposes the electric tailgate strut.

[0005] To achieve the above-mentioned purpose, this utility model incorporates the following technical solutions: The electric tailgate strut, including 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, A gas spring arranged inside the telescopic rod, consisting of a threaded tube with a thread on the inner wall, a piston rod, and a piston, wherein the distance between the threaded tube and the inner tube remains constant, the piston being located at the free end of the piston rod and in a rotary fit with the inner wall of the threaded tube, and wherein a sealing guide assembly is provided between the threaded tube and the piston rod; a drive unit fixedly arranged in the outer tube and serving to rotaryally drive the piston rod, such that the piston rod 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.

[0006] Preferably, the inner wall of the threaded tube is provided with the threaded projection, and the piston is provided with a threaded groove that fits the threaded projection, with no self-locking between the piston and the threaded tube.

[0007] Preferably, the inner wall of the outer tube is provided with the evenly distributed first grooves along its axis, wherein The outer wall of the inner tube is provided with a first convex stripe that is uniformly distributed along its axis, and the inner wall of the inner tube is provided with second grooves that are uniformly distributed along its axis, wherein the first convex stripe is adapted to the first groove, wherein The lower end of the inner tube is provided with the inner tube plug, and the side wall of the inner tube plug is firmly provided with the second convex strip, which is adapted to the second groove.

[0008] Preferably, the back plug of the threaded pipe is firmly installed at the end of the threaded pipe, with the back plug of the threaded pipe being firmly connected to the inner pipe plug.

[0009] Preferably, one end of the inner tube plug is provided with the connecting rod for the back plug, which is connected to the back plug of the threaded pipe, with the other end of the inner tube plug being provided with the tailgate attachment part.

[0010] Preferably, the outer tube plug is fixedly installed at the end of the outer tube, wherein a current conductor opening is provided at the end or on the side of the outer tube plug, and wherein the side wall of the outer tube plug is provided with the third convex strip which is adapted to the first groove.

[0011] Preferably, the drive unit comprises the motor, the gearbox and the control system, wherein the output end of the motor drives the threaded tube to rotate through the gearbox.

[0012] Preferably, the sealing guide assembly comprises a spacer sleeve, an oil seal, and a rear upper sleeve, wherein the oil seal is located between the spacer sleeve and the rear upper sleeve, and wherein the rear upper sleeve is rigidly connected to the end of the threaded tube. Preferably, the tailgate connection part is a ball socket or ball joint, wherein at least one end of the connection part is rotatable around the telescopic rod.

[0013] 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.

[0014] The present utility model has the following advantages: 1. In the electric tailgate strut, the motor drives the piston rod into rotation, allowing the outer tube to move along the axis of the inner tube, thus raising or lowering the strut. The threaded tube itself, together with the piston rod and piston, forms a gas spring, significantly improving the smoothness of opening and closing the tailgate. Furthermore, when the electric tailgate strut is extended, the gas spring provides a certain initial force, which, under identical conditions, can reduce the load on the motor and increase the thrust. 2. In this electric tailgate strut, the threaded tube, piston rod, and piston form a non-self-locking gas spring. Controlling the motor's rotation limits the rotation of the threaded tube, automatically locks the gas spring, and improves the stability of the electric tailgate strut. 3. Both the end of the outer tube and the end of the inner tube are provided with the protective cover, which can be waterproof and dustproof. DESCRIPTION OF THE DRAWINGS Fig. Figure 1 is a schematic three-dimensional structural diagram of the electric tailgate strut of the present utility model. Fig. Figure 2 is a schematic front view of the structure of the electric tailgate strut of the present utility model. Fig. 3 is a schematic cross-sectional structure diagram of AA in Fig. 2 of the electric tailgate strut of the present utility model. Fig. Figure 4 is a schematic three-dimensional structural diagram of the outer tube of the electric tailgate strut of the present utility model. Fig. Figure 5 is a schematic three-dimensional structural diagram of the inner tube of the electric tailgate strut of the present utility model. Fig. Figure 6 is a schematic front view of the construction of the threaded tube of the electric tailgate strut of the present utility model. Fig. Figure 7 is a schematic cross-sectional structure diagram of BB in Fig. 6 of the electric tailgate strut of the present utility model. Fig. Figure 8 is a schematic three-dimensional structural diagram of the piston of the electric tailgate strut of the present utility model. Fig. Figure 9 is a schematic three-dimensional structural diagram of the inner tube plug of the electric tailgate strut of the present utility model. Fig. Figure 10 is a schematic structural diagram of the inner tube plug of the electric tailgate strut in another embodiment of the present utility model. Fig. Figure 11 is a schematic three-dimensional structural diagram of the outer tube plug of the electric tailgate strut of the present utility model. Description of the main components:

[0015] 1. Outer tube; 2. Inner tube; 3. Threaded tube; 4. Motor; 5. Gearbox; 6. Clutch; 7. Piston rod; 8. Piston; 9. Shock-absorbing pad; 10. Rear upper sleeve; 11. Oil seal; 12. Spacer sleeve; 13. Threaded tube back plug; 14. Inner tube plug; 15. First ball socket; 16. Outer tube plug; 17. Second ball socket; 18. Outer tube protective sleeve; 19. Inner tube protective sleeve; 101. First groove; 201. First convex strip; 202. Second groove; 301. Thread groove; 801. Thread projection; 141. Second convex strip; 161. Third convex strip. SPECIFIC EXECUTION FORMS

[0016] The technical solutions in the embodiments of the present utility model are described below in detail and in full with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present utility model, but not all embodiments.

[0017] With reference to Fig. The electric tailgate strut comprises the following (1 to 11): The telescopic rod consists of an outer tube 1 and an inner tube 2, whereby the outer tube 1 can move along the axis direction of the inner tube 2.

[0018] The gas spring is arranged inside the telescopic rod and consists of the threaded tube 3 with the thread on its inner wall, the piston rod 7, and the piston 8. The distance between the threaded tube 3 and the inner tube 2 remains constant. The piston 8 is located at the free end of the piston rod 7 and is in a rotary seat with the inner wall of the threaded tube 3. A sealing guide assembly is provided between the threaded tube 3 and the piston rod 7. The drive unit is fixedly arranged in the outer tube 1 and serves to rotaryally drive the piston rod 7, so that the piston rod 7 drives the outer tube 1 to move along the axial direction of the inner tube 2.

[0019] The tailgate connection part is located at both ends of the telescopic pole and serves to connect the telescopic pole to the tailgate.

[0020] The inner wall of the threaded tube 3 is provided with a threaded projection 801, and the piston 8 is provided with a threaded groove 301 that fits the threaded projection 801, with no self-locking between the piston 8 and the threaded tube 3.

[0021] The inner wall of the outer tube 1 is provided along its axis with the evenly distributed first grooves 101.

[0022] The outer wall of the inner tube 2 is provided with the first convex strips 201, which are evenly distributed along its axis, and the inner wall of the inner tube 2 is provided with evenly distributed second grooves 202 along its axis, wherein the first convex strip 201 is adapted to the first groove 101.

[0023] The lower end of the inner tube 2 is provided with the inner tube plug 14, wherein the side wall of the inner tube plug 14 is fixedly provided with the second convex strip 141, which is adapted to the second groove 202.

[0024] The back plug of the threaded pipe 13 is firmly installed at the end of the threaded pipe 3, with the back plug of threaded pipe 13 being firmly connected to the inner pipe plug 14.

[0025] One end of the inner tube plug 14 is provided with a connecting rod for back plugs, which is connected to the back plug of the threaded tube 13, with the other end of the inner tube plug 14 of the lifting rod being provided with the tailgate attachment part.

[0026] The outer tube plug 16 is fixedly installed at the end of the outer tube 1, wherein a power line opening is provided at the end or on the side of the outer tube plug 16, and wherein the side wall of the outer tube plug 16 is provided with the third convex strip 161 which is adapted to the first groove 101.

[0027] The drive unit comprises the motor 4, the gearbox 5, and the control unit, wherein the output end of the motor 4 drives the threaded tube 3, causing it to rotate through the gearbox 5. The gearbox 5 is the planetary reduction gearbox. The control unit includes the Hall encoder or another signal feedback unit. The output end of the gearbox 5 can be connected to the end of the piston rod 7 via coupling 6. The end of the piston rod 7 can be fitted with a double-eared back plug, which is connected to the output shaft of the gearbox 5 via a matching pin shaft.

[0028] The area on the piston rod 7 between the coupling 6 and the threaded tube 3 is covered with the shock-absorbing pad 9.

[0029] The sealing guide assembly comprises spacer sleeve 12, oil seal 11 and rear upper sleeve 10, wherein the oil seal 11 is located between the spacer sleeve 12 and the rear upper sleeve 10, and wherein the rear upper sleeve 10 is firmly connected to the end of the threaded tube 3.

[0030] The tailgate connection part is the ball socket or ball head, wherein at least one end of the connecting part is rotatable around the telescopic rod.

[0031] If the tailgate attachment part is a ball socket, the ball socket comprises the second ball socket 17, which is connected to the outer tube plug 16, and the first ball socket 15, which is connected to the inner tube plug 14. At least one end of the ball socket is rotatable around the telescopic rod. As in Fig.As shown in Figure 10, the inner tube plug 14 and the first ball socket 15 are formed in one piece in this schematic diagram, and the first ball socket 15 cannot rotate. At this time, the second ball socket 17 must rotate around the axis of the outer tube plug 16 to allow the smooth installation of the tailgate strut.

[0032] The protective cover comprises the outer tube protective cover 18 provided at the end of the outer tube 1 and the inner tube protective cover 19 provided at the end of the inner tube 2, wherein outer tube protective covers 18 are attached to both ends of the outer tube 1.

[0033] In the electric tailgate strut, the motor 4 rotates the piston rod 7, allowing the outer tube 1 to move along the axis of the inner tube 2, thus enabling the strut to rise or fall. The threaded tube 3 itself, together with the piston rod 7 and the piston 8, forms the gas spring, significantly improving the smoothness of opening and closing the tailgate. Furthermore, when the electric tailgate strut is extended, the gas spring exerts a certain initial force, which, under identical conditions, can reduce the load on the motor 4 and increase the thrust.

[0034] In this electric tailgate strut, threaded tube 3, piston rod 7, and piston 8 form a non-self-locking gas spring. Controlling the rotation of motor 4 limits the rotation of threaded tube 3, enables automatic locking of the gas spring, and improves the stability of the electric tailgate strut.

[0035] Both the end of the outer tube 1 and the end of the inner tube 2 are provided with the protective cover, which can be waterproof and dustproof.

[0036] Although embodiments of the present utility model are described with reference to the accompanying drawings, as shown above, a person skilled in the art in the technical field to which the present utility model belongs may understand that the present utility model can be implemented in other specific forms without departing from the principle and spirit of the utility model. A multitude of changes, modifications, replacements, and transformations of these embodiments are intended to be included within the scope of protection of the present utility model.

Claims

[1] The electric tailgate strut, comprising Telescopic rod consisting of the outer tube and the 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 inner wall, the piston rod and the piston, wherein the distance between the threaded tube and the inner tube remains constant, wherein the piston is located at the free end of the piston rod and is in a rotary 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, Drive unit which is fixedly arranged in the outer tube and serves to drive the piston rod in rotation so that the piston rod 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] The electric tailgate strut according to claim 1, characterized by that the inner wall of the threaded tube is provided with the threaded projection and the piston is provided with a threaded groove that matches the threaded projection, whereby there is no self-locking between the piston and the threaded tube. [3] The electric tailgate strut according to claim 2, characterized by that the inner wall of the outer tube is provided with uniformly distributed first grooves along its axis, whereby The outer wall of the inner tube is provided with a first convex stripe which is evenly distributed along its axis, and the inner wall of the inner tube is provided along its axis with evenly distributed second grooves, the first convex stripe being adapted to the first groove, Lower end of the inner tube is provided with the inner tube plug, and side wall of the inner tube plug is fixedly provided with the second convex strip which is adapted to the second groove. [4] Electric tailgate strut according to claim 3, characterized by that the threaded pipe back plug is firmly installed at the end of the threaded pipe, whereby the threaded pipe back plug is firmly connected to the inner pipe plug. [5] Electric tailgate strut according to claim 4, characterized by that one end of the inner tube plug is provided with connecting rod for back plug, which is connected to back plug of the threaded pipe, wherein the other end of the inner tube plug of the lifting rod is provided with the tailgate connecting part. [6] Electric tailgate strut according to claim 5, characterized bythat at the end of the outer pipe the outer pipe plug is fixedly installed, wherein at the end or at the side of the outer pipe plug the power line opening is provided, and wherein side wall of the outer pipe plug is provided with the third convex strip which is adapted to the first groove. [7] The electric tailgate strut according to one of claims 1 to 6, characterized by that the drive unit comprises a motor, a gearbox and a control system, wherein the output end of the motor drives the threaded tube for rotation through the gearbox. [8] The electric tailgate strut according to claim 7, characterized by that a 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] The electric tailgate strut according to claim 8, characterized by that the tailgate connection part is the ball socket or the ball head, wherein at least one end of the connecting part is rotatable on the telescopic rod. [10] Electric tailgate strut according to claim 9, characterized by that 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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