Automotive electric tailgate support

Abstract

Provide an electric tailgate support for automobiles, which can effectively improve the smoothness of the tailgate when opening and closing, reduce the load on the motor, increase the thrust, realize the automatic locking of the gas spring, and improve the stability. [Solution] The electric tailgate pillar for an automobile comprises a telescopic rod composed of an outer tube 1 and an inner tube 2, the outer tube being movable along the axial direction of the inner tube, a threaded tube 3 installed inside the telescopic rod and having a screw installed on its outer wall, a piston rod 9 and a piston 8, the distance between the piston rod and the inner tube does not change, the piston is located at the free end of the piston rod and slip-fits with the inner wall of the threaded tube, a gas spring with a seal guide part installed between the threaded tube and the piston rod, a nut 7 that fits the threaded tube and is installed at the end of the inner tube, and a drive unit used to drive the rotation of the threaded tube.

Description

[Technical field]

[0001] The present invention relates to the technical field of tailgate pillars, in particular to an electric tailgate pillar for automobiles. [Background technology]

[0002] Automotive tailgate opening and closing systems are generally divided into two types: electric and manual. Electric tailgate opening and closing systems can be categorized into the following two layout solutions: one is equipped with two electric struts (PR, a product that extends and retracts a screw actuator driven by a motor) on each side of the tailgate, i.e. PR+PR; the other is equipped with one electric strut (PR) and one air balance strut (FEBI, a product that looks like an electric strut on the outside and has a conventional gas spring inside) on each side of the tailgate, i.e. PR+FEBI.

[0003] When adopting the PR+PR configuration solution, traditional electric props generally do not have a damping structure, so the tailgate is prone to shaking during the process of raising or lowering the electric prop, which affects the user's experience. When adopting the PR+FEBI configuration solution, the smoothness of the tailgate when opening and closing is greatly improved, but for some large vehicles with large tailgate mass such as off-road vehicles, the use of a single electric prop will result in insufficient power. Summary of the Invention [Problem to be solved by the invention]

[0004] The present utility model aims to propose an electric tailgate pillar for a motor vehicle to overcome the drawbacks existing in the prior art.

[0005] To achieve the above objectives, this utility model adopts the following technical solutions:

[0006] The electric tailgate pillar of an automobile is an extendable rod including an outer tube and an inner tube, the outer tube being movable along the axial direction of the inner tube; A gas spring including a threaded tube, a piston rod and a piston, the distance between the piston rod and the inner tube not changing, the piston located at the free end of the piston rod and slip-fitting with the inner wall of the threaded tube, and a seal guide member installed between the threaded tube and the piston rod; a nut that fits the threaded pipe and is installed on the end of the inner pipe; a driving unit fixed and installed inside the outer pipe and used to drive the rotation of the threaded pipe so that the threaded pipe can drive the outer pipe to move along the axial direction of the inner pipe; The tailgate connecting members are located on both ends of the telescopic rod and are used to connect the telescopic rod to the tailgate.

[0007] Preferably, there is no self-locking between the nut and the threaded tube.

[0008] Preferably, the nut is used to restrict the position of the telescopic rod in a circumferential direction so that the telescopic rod cannot move in the circumferential direction between the outer tube and the inner tube; The inner wall of the outer tube has a first groove evenly distributed along its axis, the inner wall of the inner tube has a second groove evenly distributed along its axis, and the outer wall of the nut has a first ridge that fits into the first groove and a second ridge that fits into the second groove.

[0009] Preferably, the driving unit includes a motor, a gearbox and a controller, and the output end of the motor drives the rotation of the screw tube via the gearbox.

[0010] Preferably, an inner pipe plug is installed at an end of the inner tube, which is connected to an end of the piston rod, and a side wall of the inner pipe plug is fixed and connected to an inner wall of the inner tube.

[0011] Preferably, a third ridge that fits into the second groove is provided on the side wall of the inner pipe plug.

[0012] Preferably, an outer tube plug is fixedly attached to the end of the outer tube, a power lead wire hole is pre-set on the end face or side of the outer tube plug, and a fourth protrusion that fits into the first groove is installed on the side wall of the outer tube plug.

[0013] Preferably, the seal guide component comprises a spacer sleeve, an oil seal, and a rear top sleeve, the oil seal being located between the spacer sleeve and the rear top sleeve, and the rear top sleeve being fixed and connected to an end of the threaded pipe.

[0014] Preferably, the tailgate connecting member is a ball socket or a ball head, and the connecting member at least at one end of the telescopic rod is rotatable in the circumferential direction.

[0015] Preferably, the device further comprises a protective cover including an outer tube protective cover installed on an end of the outer tube, and an inner tube protective cover installed on an end of the inner tube. Effect of the Invention

[0016] The effects of this utility model are as follows: 1. In this electric tailgate pillar of the automobile, the motor drives the rotation of the threaded tube to make the outer tube move along the axial direction of the inner tube, thereby realizing the lifting or lowering of the pillar; the threaded tube itself also constitutes a gas spring together with the piston rod and piston, etc., which effectively improves the smoothness of the tailgate when opening and closing; on the other hand, when the electric tailgate pillar of the automobile is extended, the gas spring has a certain output force, which can reduce the load of the motor and increase the thrust under the same condition. 2. In this electric tailgate support for automobiles, the threaded tube, piston rod and piston etc. constitute a non-locking gas spring, and the rotation of the threaded tube can be limited by controlling the rotation of the motor, so as to realize the automatic locking of the gas spring and improve the stability of the electric tailgate support for automobiles. 3. The ends of the outer tube and the inner tube are both equipped with protective covers, which can play a role in waterproofing and dustproofing. [Brief description of the drawings]

[0017] [Figure 1] 1 is a schematic diagram showing the three-dimensional structure of an electric tailgate pillar for an automobile proposed by this utility model. [Diagram 2] FIG. 1 is a schematic diagram showing the front structure of an electric tailgate pillar for an automobile proposed by this utility model. [Diagram 3] FIG. 3 is a schematic diagram showing the cross-sectional structure of the electric tailgate pillar of an automobile proposed by this utility model along the line AA in FIG. 2 . [Figure 4] FIG. 2 is a schematic diagram showing the three-dimensional structure of the outer tube of an electric tailgate pillar of an automobile proposed by this utility model. [Diagram 5] FIG. 2 is a schematic diagram showing the three-dimensional structure of the inner tube of the electric tailgate pillar of an automobile proposed by this utility model. [Figure 6] FIG. 2 is a schematic diagram showing the three-dimensional structure of a nut for an electric tailgate pillar of an automobile proposed by this utility model. [Figure 7] FIG. 2 is a schematic diagram showing the three-dimensional structure of the inner pipe plug of the electric tailgate pillar of an automobile proposed by this utility model. [Figure 8] FIG. 2 is a schematic diagram showing the three-dimensional structure of the outer tube plug of the electric tailgate pillar of an automobile proposed by this utility model. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] The technical solutions in the embodiments of the present utility model are clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part, not all, of the embodiments of the present utility model.

[0019] Referring to Figures 1 to 8, the electric tailgate pillar of an automobile is: An extendable rod is composed of an outer tube 1 and an inner tube 2, and the outer tube 1 can move along the axial direction of the inner tube 2; A gas spring is installed inside the telescopic rod, and includes a threaded tube 3 with a thread installed on the outer wall, a piston rod 9 and a piston 8, the distance between the piston rod 9 and the inner tube 2 does not change, the piston 8 is located at the free end of the piston rod 9 and slip-fits with the inner wall of the threaded tube 3, and a seal guide part is installed between the threaded tube 3 and the piston rod 9; a nut 7 that fits the threaded pipe 3 and is installed on the end of the inner pipe 2; a drive unit, which is installed inside the outer tube 1 and is used to drive the rotation of 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; The tailgate connecting members are located on both ends of the telescopic rod and are used to connect the telescopic rod to the tailgate.

[0020] The nut 7 is used to restrict the position of the telescopic rod in the circumferential direction so that circumferential movement between the outer tube 1 and the inner tube 2 is not possible.

[0021] The inner wall of the outer tube 1 is provided with a first groove 101 evenly distributed along its axis, the inner wall of the inner tube 2 is provided with a second groove 201 evenly distributed along its axis, and the outer wall of the nut 7 is provided with a first ridge 701 that fits into the first groove 101 and a second ridge 702 that fits into the second groove 201.

[0022] The driving unit includes a motor 4, a gearbox and a controller, and the output end of the motor 4 drives the rotation of the screw tube 3 through the gearbox 5. The gearbox 5 is a planetary reduction gearbox, and the controller is a Hall encoder or other signal feedback unit. A double-eared rear plug 6 is attached to the end of the screw tube 3, and the double-eared rear plug 6 is connected to the output shaft of the gearbox 5 through a pin shaft 20, and the output end of the gearbox 5 may be connected to the end of the screw tube 3 through a coupling.

[0023] An inner pipe plug 13 connected to the end of the piston rod 9 is installed at the end of the inner tube, and the side wall of the inner pipe plug 13 is fixed and connected to the inner wall of the inner tube 2. A bearing 14 is installed between the inner pipe plug 13 and the piston rod 9, and a pipe plug steaming cover 15 for restricting the position of the bearing 14 in the axial direction is further fixedly installed on the inner pipe plug 13.

[0024] A third ridge 131 that fits into the second groove 201 is provided on the side wall of the inner pipe plug 13, and the second groove 201 matches with the third ridge 131, thereby restricting the position of the inner pipe plug 13 in the circumferential direction.

[0025] An outer tube pipe plug 18 is fixedly attached to the end of the outer tube 1, and a fourth convex rib 181 that fits into the first groove 101 is provided on the side wall of the outer tube pipe plug 18. The first groove 101 matches with the fourth convex rib 181, thereby limiting the rotation of the outer tube pipe plug 18 in the circumferential direction.

[0026] The seal guide part comprises a spacer sleeve 10, an oil seal 11 and a rear top sleeve 12, the oil seal 11 being located between the spacer sleeve 10 and the rear top sleeve 12, and the rear top sleeve 12 being fixed and connected to the end of the threaded pipe 3.

[0027] The tailgate connecting member is a ball socket or a ball head, and the connecting member at least at one end of the telescopic rod is rotatable in the circumferential direction.

[0028] When the tailgate connecting member is a ball socket, the ball socket has a first ball socket 17 connected to the outer tube pipe plug 18 and a second ball socket 132 connected to the inner tube pipe plug 13, and the connecting member at at least one end of the telescopic rod is rotatable in the circumferential direction.

[0029] It further includes protective covers including an outer tube protective cover 16 installed at the end of the outer tube 1, an outer tube protective cover 16 installed at both ends of the outer tube 1, and an inner tube protective cover 19 installed at the end of the inner tube 2.

[0030] In this electric tailgate pillar for automobiles, the rotation of the screw tube 3 is driven by the motor 4 so that the outer tube 1 can move along the axial direction of the inner tube 2, thereby realizing the lifting or lowering of the pillar, and the screw tube 3 itself, together with the piston rod 9 and the piston 8, constitutes a gas spring, which effectively improves the smoothness of the tailgate when opening and closing. On the other hand, when the electric tailgate pillar for automobiles is extended, the gas spring has a certain output force, which can reduce the load of the motor 4 and increase the thrust under the same conditions.

[0031] In this electric tailgate pillar for automobiles, the threaded tube 3, the piston rod 9, the piston 8, etc. constitute a non-locking gas spring, and the rotation of the threaded tube 3 can be limited by controlling the rotation of the motor 4, thereby realizing automatic locking of the gas spring and improving the stability of the electric tailgate pillar for automobiles.

[0032] The ends of the outer tube 1 and the inner tube 2 are both provided with protective covers, which serve to provide waterproofing and dust protection.

[0033] The above are only preferred specific embodiments of the present utility model, and the protection scope of the present utility model is not limited thereto. Any equivalent replacement or modification made by a person skilled in the art based on the technical solutions of the present utility model and the ideas of the utility model within the technical scope disclosed by the present utility model should be included in the protection scope of the present utility model. [Explanation of symbols]

[0034] 1 outer tube 2 Inner tube 3 Threaded Pipe 4 Motor 5 Gearbox 6 Binaural rear plugs 7 Nut 8 Piston 9 Piston rod 10 Spacer sleeve 11 Oil seal 12 Rear Top Sleeve 13 Inner pipe plug 14 Bearings 15 Pipe stopper steamer lid 16 Protective cover for outer tube 17 First Ball Socket 18 Outer pipe plug 19 Inner tube protective cover 20 pin shaft 101 First Groove 201 Second Groove 701 First convex strip 702 Second convex stripe 131 Third ridge 132 Second Ball Socket 181 Fourth ridge

Claims

1. An electric tailgate pillar for a motor vehicle, comprising: an extendable rod including an outer tube and an inner tube, the outer tube being movable along the axial direction of the inner tube; A gas spring is installed inside a telescopic rod, the gas spring includes a threaded tube having a thread on its outer wall, a piston rod and a piston, the distance between the piston rod and the inner tube does not change, the piston is located at the free end of the piston rod and slip-fits with the inner wall of the threaded tube, and a seal guide is installed between the threaded tube and the piston rod; a nut that fits the threaded pipe and is installed on the end of the inner pipe; a driving unit fixed and installed inside the outer tube, and used to drive the rotation of the threaded tube, so that the threaded tube can drive the outer tube to move along the axial direction of the inner tube; An electric tailgate support for an automobile, comprising tailgate connecting members located at both ends of a telescopic rod and used for connecting the telescopic rod to a tailgate.

2. The electric tailgate pillar for automobiles as claimed in claim 1, characterized in that the relationship between the nut and the threaded tube is not self-locking.

3. The nut is used to restrict the position of the telescopic rod in a circumferential direction so that the telescopic rod cannot move in the circumferential direction between the outer tube and the inner tube; The electric tailgate pillar for an automobile as described in claim 2, characterized in that the inner wall of the outer tube is provided with a first groove evenly distributed along its axis, the inner wall of the inner tube is provided with a second groove evenly distributed along its axis, and the outer wall of the nut is provided with a first ridge that fits into the first groove and a second ridge that fits into the second groove.

4. The electric tailgate pillar for automobiles as claimed in claim 1, characterized in that the driving unit comprises a motor, a gearbox and a controller, and the output end of the motor drives the rotation of the screw tube through the gearbox.

5. The electric tailgate support for an automobile as described in claim 3, characterized in that an inner pipe plug is installed at the end of the inner tube, which is connected to the end of the piston rod, and the side wall of the inner pipe plug is fixed and connected to the inner wall of the inner tube.

6. 6. The electric tailgate support for automobiles as claimed in claim 5, wherein a third protrusion is provided on the side wall of the inner pipe plug, the third protrusion being fitted into the second groove.

7. The electric tailgate support for an automobile as described in claim 6, characterized in that an outer tube pipe plug is fixedly attached to the end of the outer tube, a power lead wire hole is pre-set on the end face or side of the outer tube pipe plug, and a fourth protrusion that fits into the first groove is installed on the side wall of the outer tube pipe plug.

8. The electric tailgate pillar for an automobile according to any one of claims 1 to 7, characterized in that the seal guide part comprises a spacer sleeve, an oil seal, and a rear top sleeve, the oil seal is located between the spacer sleeve and the rear top sleeve, and the rear top sleeve is fixed and connected to the end of the threaded tube.

9. 9. The electric tailgate support for an automobile as claimed in claim 8, wherein the tailgate connecting member is a ball socket or a ball head, and the connecting member at least at one end of the telescopic rod is rotatable in a circumferential direction.

10. The electric tailgate pillar for an automobile as claimed in claim 9, further comprising a protective cover, including an outer tube protective cover installed on an end of the outer tube, and an inner tube protective cover installed on an end of the inner tube.

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