Electric tailgate support

Abstract

Provide an electric tailgate prop, 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 support 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 inner wall, a gas spring including a piston 8 and a piston rod 7, a drive unit fixed and installed inside the outer tube and used to drive the rotation of the piston rod so that the piston rod drives the outer tube to move along the axial direction of the inner tube, and tailgate connecting members located on both ends of the telescopic rod and used to connect the telescopic rod to the tailgate.

Description

[Technical field]

[0001] The present invention relates to the technical field of tailgate pillars, in particular to an electric tailgate pillar. [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 to overcome the drawbacks existing in the prior art.

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

[0006] Electric tailgate support pillar, 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, and includes a threaded tube with a thread on the inner wall, a piston and a piston rod, the distance between the threaded tube and the inner tube does not change, the piston is located at the free end of the piston rod and rotates with the inner wall of the threaded tube, and a seal guide is installed between the piston rod and the threaded tube; a driving unit fixed and installed inside the outer tube and used to drive the rotation of the piston rod so that the piston rod can drive the outer tube to move along the axial direction of the inner tube; 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, a thread protrusion is provided on the inner wall of the threaded tube, and a thread groove that matches the thread protrusion is provided on the piston, so that the piston and the threaded tube cannot self-lock.

[0008] Preferably, the inner wall of the outer tube is provided with first grooves uniformly distributed along its axis, The outer wall of the inner tube is provided with first ridges evenly distributed along its axis, and the inner wall of the inner tube is provided with second grooves evenly distributed along its axis, and the first ridges fit into the first grooves; An inner pipe plug is provided at the lower end of the inner pipe, and a second protrusion that fits into the second groove is provided on the side wall of the inner pipe plug.

[0009] Preferably, a threaded pipe rear plug is fixedly attached to the end of the threaded pipe, and the threaded pipe rear plug is fixedly connected to an inner pipe plug.

[0010] Preferably, one end of the inner pipe plug is provided with a rear plug connecting rod connected to the threaded pipe rear plug, and the other end of the inner pipe plug of the lift rod is provided with a tailgate connecting member.

[0011] Preferably, an outer tube plug is fixedly attached to the end of the outer tube, a power lead wire is pre-installed on the end face or side of the outer tube plug, and a third protrusion that fits into the first groove is installed on the side wall of the outer tube plug.

[0012] Preferably, the driving unit includes a motor, a gearbox and a controller, and the output end of the motor drives the screw tube to rotate via the gearbox.

[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 can rotate in a circumferential direction.

[0015] Preferably, the fuel cell further comprises a protective cover including an outer pipe protective cover disposed on an end of the outer pipe, and an inner pipe protective cover disposed on an end of the inner pipe. Effect of the Invention

[0016] The effects of this utility model are as follows: 1. In the electric tailgate strut, the motor drives the rotation of the piston rod to make the outer tube move along the axial direction of the inner tube, thereby realizing the lifting or lowering of the strut; the threaded tube itself 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 strut 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, 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. 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 proposed by this utility model. [Diagram 2] FIG. 2 is a schematic diagram showing the front structure of the electric tailgate pillar proposed by the present utility model. [Diagram 3] 3 is a schematic diagram showing a cross-sectional structure of the electric tailgate support pillar proposed by the present utility model taken along line AA in FIG. 2. FIG. [Figure 4] FIG. 2 is a schematic diagram showing the three-dimensional structure of the outer tube of the electric tailgate pillar proposed in 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 proposed in this utility model. [Figure 6] FIG. 2 is a schematic diagram showing the front structure of the threaded tube of the electric tailgate pillar proposed by this utility model. [Figure 7] 7 is a schematic diagram showing the cross-sectional structure of the electric tailgate pillar proposed by the present utility model taken along line BB in FIG. 6. FIG. [Figure 8] 1 is a schematic diagram showing the three-dimensional structure of an electric tailgate pillar proposed by this utility model. [Figure 9] FIG. 2 is a schematic diagram showing the three-dimensional structure of the inner pipe plug of the electric tailgate pillar proposed by this utility model. [Figure 10] FIG. 11 is a schematic diagram showing the structure of the inner pipe plug of the electric tailgate pillar in another embodiment proposed by the present utility model. [Figure 11]FIG. 2 is a schematic diagram showing the three-dimensional structure of the outer tube plug of the electric tailgate pillar proposed in 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 11, the electric tailgate pillar 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 inner wall, a piston 8, and a piston rod 7, the distance between the threaded tube 3 and the inner tube 2 does not change, the piston 8 is located at the free end of the piston rod 7 and rotates and fits with the inner wall of the threaded tube 3, and a seal guide part is installed between the piston rod 7 and the threaded tube 3; a driving unit fixed and installed inside the outer tube 1 and used to drive the rotation of 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; 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] A threaded protrusion 801 is provided on the inner wall of the threaded tube 3, and a thread groove 301 that fits the threaded protrusion 801 is provided on the piston 8, so that the piston 8 and the threaded tube 3 cannot self-lock.

[0021] The inner wall of the outer tube 1 is provided with first grooves 101 evenly distributed along its axis, The outer wall of the inner tube 2 is provided with first ridges 201 evenly distributed along its axis, and the inner wall of the inner tube 2 is provided with second grooves 202 evenly distributed along its axis, and the first ridges 101 fit into the first grooves; An inner pipe plug 14 is installed at the lower end of the inner pipe 2 , and a second protrusion 141 that fits into the second groove 202 is installed on the side wall of the inner pipe plug 14 .

[0022] A threaded pipe rear plug 13 is fixedly attached to the end of the threaded pipe 3 , and the threaded pipe rear plug 13 is fixedly connected to an inner pipe plug 14 .

[0023] A rear plug connecting rod is provided at one end of the inner pipe plug 14, which is connected to the threaded rear plug 13, and a tailgate connecting member is provided at the other end of the inner pipe plug 14 of the lift rod.

[0024] An outer tube pipe plug 16 is fixedly attached to the end of the outer tube 1, a power lead wire is pre-installed on the end face or side of the outer tube pipe plug 16, and a third ridge 161 that fits into the first groove 101 is installed on the side wall of the outer tube pipe plug 16.

[0025] The driving unit includes a motor 4, a gearbox and a controller. The output end of the motor 4 drives the screw tube 3 to rotate through the gearbox 5. The gearbox 5 is a planetary reduction gearbox, and the controller is a Hall encoder or other signal feedback unit. The output end of the gearbox 5 is connected to the end of the piston rod 7 through a coupling 6. The end of the piston rod 7 may be fitted with a double-eared rear plug, which is connected to the output shaft of the gearbox 5 through matching with the pin shaft; A vibration damping pad 10 is provided in the area of ​​the piston rod 7 located between the coupling 6 and the threaded tube 3 .

[0026] The seal guide part comprises a spacer sleeve 12, an oil seal 11 and a rear top sleeve 10, the oil seal 11 being located between the spacer sleeve 12 and the rear top sleeve 10, and the rear top sleeve 10 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 can rotate in the circumferential direction.

[0028] When the tailgate connecting member is a ball socket, the ball socket includes a second ball socket 17 connected to the outer pipe plug 16 and a first ball socket 15 connected to the inner pipe plug 14, and the ball socket at least at one end of the telescopic rod can rotate in the circumferential direction. As shown in Fig. 10, in this schematic diagram, the inner pipe plug 14 and the first ball socket 15 are integrally formed, and the first ball socket 15 cannot rotate, and at this time, the second ball socket 17 must be rotatable around the axis of the outer pipe plug 16 to facilitate the installation of the tailgate pillar.

[0029] It further includes protective covers including an outer tube protective cover 18 installed at the end of the outer tube 1, an outer tube protective cover 18 installed at both ends of the outer tube 1, and an inner tube protective cover 2 installed on the inner tube 2.

[0030] In the electric tailgate pillar, the rotation of the piston rod 7 is driven via the motor 4 to enable the outer tube 1 to move along the axial direction of the inner tube 2, thereby realizing the lifting or lowering of the pillar; the threaded tube 3 itself, together with the piston rod 7 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 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, the threaded tube 3, the piston rod 7, 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 of the automobile.

[0032] Both the end of the outer tube 1 and the end of the inner tube 2 are provided with protective covers, which serve to provide waterproofing and dustproofing.

[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 Coupling 7 Piston rod 8 Piston 9 Vibration Damping Pads 10 Rear Top Sleeve 11 Oil seal 12 Spacer sleeve 13 Threaded pipe rear plug 14 Inner pipe plug 15 First Ball Socket 16 Outer pipe plug 17 Second Ball Socket 18 Protective cover for outer tube 19 Inner tube protective cover 101 First Groove 201 First convex strip 202 Second Groove 301 Thread groove 801 Screw protrusion 141 Second convex stripe 161 Third ridge

Claims

1. An electric tailgate pillar, 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 with a thread on the inner wall, a piston and a piston rod, the distance between the threaded tube and the inner tube does not change, the piston is located at the free end of the piston rod and is rotationally fitted with the inner wall of the threaded tube, and a seal guide is installed between the piston rod and the threaded tube; a driving unit fixed and installed inside the outer tube, and used to drive the rotation of the piston rod, so that the piston rod can drive the outer tube to move along the axial direction of the inner tube; An electric tailgate support pillar comprising tailgate connecting members located at both ends of a telescopic rod and used to connect the telescopic rod to a tailgate.

2. The electric tailgate support as claimed in claim 1, characterized in that a threaded protrusion is provided on the inner wall of the threaded tube, and a thread groove is provided on the piston to match the threaded protrusion, so that the piston and the threaded tube cannot self-lock.

3. The inner wall of the outer tube is provided with first grooves uniformly distributed along its axis; The outer wall of the inner tube is provided with first ridges evenly distributed along its axis, and the inner wall of the inner tube is provided with second grooves evenly distributed along its axis, and the first ridges fit into the first grooves; The electric tailgate support as described in claim 2, characterized in that an inner tube plug is installed at the lower end of the inner tube, and a second protrusion that fits into the second groove is installed on the side wall of the inner tube plug.

4. 4. The electric tailgate support as claimed in claim 3, wherein a threaded pipe rear plug is fixedly attached to the end of the threaded pipe, and the threaded pipe rear plug is fixedly connected to the inner pipe plug.

5. The electric tailgate support pillar according to claim 4, characterized in that a rear plug connecting rod is installed at one end of the inner pipe plug, which is connected to the threaded pipe rear plug, and a tailgate connecting member is installed at the other end of the inner pipe plug of the lift rod.

6. The electric tailgate support pillar according to claim 5, characterized in that an outer tube plug is fixedly attached to the end of the outer tube, a power lead wire is pre-installed on the end face or side of the outer tube plug, and a third protrusion that fits into the first groove is installed on the side wall of the outer tube plug.

7. The electric tailgate pillar according to any one of claims 1 to 6, characterized in that the drive unit comprises a motor, a gearbox and a controller, and the output end of the motor drives the screw tube to rotate via the gearbox.

8. The electric tailgate pillar according to claim 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 pole according to claim 8, wherein the tailgate connecting member is a ball socket or a ball head, and the connecting member at at least one end of the telescopic rod can rotate in a circumferential direction.

10. 10. The electric tailgate pillar according to claim 9, further comprising a protective cover, the protective cover including an outer pipe protective cover installed on an end of the outer pipe, and an inner pipe protective cover installed on an end of the inner pipe.

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