TWI790884B - Electric power strut - Google Patents

Abstract

This disclosure is an electric power strut having a driving assembly, an actuating assembly and a bearing. The driving assembly has a first outer tube and a driving unit accommodated in the first outer tube. An inner thread is provided on an internal wall of the first outer tube. The actuating assembly has a second outer tube and a transmission screw-rod in the second outer tube. The second outer tube has axial elastic arms arranged at intervals around the transmission screw-rod. Each elastic arm has an external surface provided with an outer thread structure and an internal surface provided with a hook portion. The second outer tube plugs the first outer tube, the inner thread screws each outer thread structure, and one end of the transmission screw-rod protrudes the first outer tube to couple the driving unit. The bearing sleeves the transmission screw-rod and the hooks clamp the bearing.

Description

Electric support rod

The invention relates to an electric support rod for an automobile tailgate, in particular to a two-section electric support rod which is convenient for assembly.

The electric tailgate of the automobile is supported by electric support rods arranged on the left and right sides of the door frame and drives the door panel to move. The electric support rod has an electric motor and a telescopic rod interlocked with it. By controlling the rotation of the electric motor, the telescopic rod can be driven to telescopically move to open or close the door panel.

Generally speaking, the electric support rod has an outer tube, and the telescopic rod and the electric motor are both passed through the outer tube. The telescopic rod has a screw connected to the electric motor, and a bearing is provided between the screw and the outer tube to fix the screw. The inner edge of the bearing needs to be pressed against the screw rod and the outer edge of the bearing needs to be pressed against the inner wall of the outer tube. The outer tube has a considerable length so that the bearing is not easy to assemble.

In view of this, the inventor of the present invention aimed at the above-mentioned prior art, devoted himself to research and combined with the application of theories, and tried his best to solve the above-mentioned problems, which became the goal of the inventor's improvement.

The invention provides a two-section electric support rod which is convenient for assembly.

The invention provides an electric support rod, which includes a driving assembly, an actuating assembly and a bearing. The drive assembly includes a first outer tube and a drive unit accommodated in the first outer tube, the first outer tube has a first butt end, the first butt end has an opening, and the inner wall of the first butt end is provided with There is an internal thread. The actuating assembly includes a second outer tube and a driving screw threaded in the second outer tube. The second outer tube has a second butt end and extends axially from the second butt end to a plurality of Elastic arms, each elastic arm has an inner surface facing the transmission screw and an outer surface facing away from the transmission screw, each outer surface is respectively provided with an outer tooth structure, each inner surface is respectively protruded with a hook portion, and the second butt joint The end is plugged into the first butt end through the opening, the inner thread is screwed to each outer thread structure, and one end of the drive screw protrudes from the first outer tube to be butted with the drive unit. The bearing is sleeved on the drive screw and the hooks are clamped on the outer edge of the bearing.

In the electric support rod of the present invention, the outer edge of the bearing is attached to the inner side of each elastic arm.

In the electric support rod of the present invention, the actuating component further includes a telescopic sleeve set passed through the second outer tube and sleeved with the drive screw, and the telescopic sleeve set has a nut screwed with the drive screw.

In the electric support rod of the present invention, the drive screw is provided with a drive screw, and the drive screw is provided with a tenon inserted transversely into the drive screw, and the bearing is clamped between one end of the drive screw and the tenon.

In the electric support rod of the present invention, each outer tooth structure includes a plurality of parallel tooth segments, and the tooth segments of the outer tooth structures are arranged on the same helical line matched with the inner thread.

In the electric support rod of the present invention, the outer wall of the second outer tube has an outer thread connected to any outer thread structure, and the outer thread and the tooth segments of the outer thread structures are arranged in a matching position with the inner thread. on the same spiral. The outer wall of the second outer tube has a joint surface, and the joint surface is attached to the inner wall of the first outer tube. The external thread is disposed between the joint surface and the external thread structures and screwed to the internal thread. The joint surface is an annular curved surface surrounding the side surface of the second outer tube.

In summary, the driving unit of the electric support rod of the present invention can be pre-assembled to the first outer tube, and the telescopic sleeve group, the transmission screw and the bearing can be pre-assembled to the second outer tube, and then the first outer tube and the second outer tube can be pre-assembled. The butt joint of the outer tube can make the transmission screw power connect the drive unit and position the bearing.

100: drive components

101: opening

110: The first outer tube

111: the first docking end

112: Internal thread

130: drive unit

200: actuation assembly

210: Second outer tube

211: the second butt end

220: spring arm

220a: inner side

220b: Outer side

221: External thread

222: External tooth structure

222a: tooth segment

223: hook

224: joint surface

230: drive screw

231: Transmission thread

232: tenon

240:Telescopic sleeve group

241: Nut

300: bearing

Fig. 1 is a three-dimensional schematic diagram of an electric support rod in a preferred embodiment of the present invention.

Fig. 2 is a three-dimensional exploded schematic diagram of an electric support rod in a preferred embodiment of the present invention.

Fig. 3 is a three-dimensional schematic view of the actuating component in the electric support rod according to the preferred embodiment of the present invention.

Fig. 4 is a longitudinal sectional view of the driving component and the actuating component of the electric support rod in a preferred embodiment of the present invention in a separated state.

Fig. 5 is a longitudinal sectional view of an electric support rod according to a preferred embodiment of the present invention.

Referring to FIG. 1 to FIG. 5 , a preferred embodiment of the present invention provides an electric support rod, which includes a driving assembly 100 , an actuating assembly 200 and a bearing 300 .

In this embodiment, the driving assembly 100 includes a first outer tube 110 and a driving unit 130 accommodated in the first outer tube 110 . The first outer tube 110 has a first butt end 111 , the first butt end 111 has an opening 101 , and an inner thread 112 is disposed on the inner wall of the first butt end 111 . In this embodiment, the driving unit 130 includes at least one motor.

The actuating assembly 200 includes a second outer tube 210 and a driving screw 230 passing through the second outer tube 210 . The second outer tube 210 has a second butt end 211 and extends axially from the second butt end 211 A plurality of elastic arms 220 arranged at intervals around the drive screw 230 are formed. Each elastic arm 220 has an inner surface 220a facing the drive screw 230 and an outer surface 220b facing away from the drive screw 230. Each outer surface 220b is respectively provided with an outer tooth structure 222, and each inner surface 220a is respectively protruded. There is at least one hook portion 223 . Each outer thread structure 222 includes a plurality of thread segments 222 a parallel to each other. Each thread segment 222 a straddles the elastic arm 220 where it is located, and these thread segments 222 a are arranged on the same helical line matched with the inner thread 112 .

The outer wall of the second outer tube 210 has a joint surface 224 and an external thread 221, the joint surface 224 is an annular curved surface surrounding the side of the second external tube 210, and the external thread 221 is arranged on the joint surface 224 and these external tooth structures Between 222. The outer wall of the second outer tube 210 has an external thread 221 connected to any external tooth structure 222, and the external thread 221 and the tooth segments 222a of the external tooth structures 222 are arranged at the same position as the internal thread 112. on the helix.

The driving screw 230 is provided with a driving screw 231 , and the driving screw 230 is provided with a tenon 232 inserted into the driving screw 230 transversely, and the bearing 300 is clamped between one end of the driving screw 231 and the tenon 232 . The tenon 232 shown in this embodiment is a C-shaped buckle, but the present invention is not limited thereto. For example, the tenon 232 can also be a pin inserted into the driving screw 230 .

The actuating assembly 200 further includes a telescopic sleeve group 240 which is passed through the second outer tube 210 and sleeved with the drive screw 230. The telescopic sleeve group 240 has a plurality of tube bodies which can movably pass through each other, thereby being able to stretch actuate to change its length. Moreover, the telescopic sleeve set 240 has a nut 241 screwed to the drive screw 230 , the nut 241 is connected to one of the tubes, and the rotation of the drive screw 230 can push the nut 241 to move along its longitudinal direction, thereby pushing the telescopic sleeve set 240 to expand and contract.

In this embodiment, the bearing 300 is ring-shaped, the bearing 300 is sleeved on the driving screw 230 and its inner edge is preferably tightly connected to the driving screw 230 . The outer diameter of the bearing 300 matches the circle formed by the inner side surfaces 220 a of the elastic arms 220 . The bearing 300 is inserted into the second outer tube 210 along the longitudinal direction of the second outer tube 210, and the shaft When the bearing 300 is placed into the second outer tube 210, it pushes against the hooks 223 and pushes the elastic arms 220 outward, and after the bearing 300 passes through the hooks 223, the elastic arms 220 are reset inward so that The outer edge of the bearing 300 is attached to the inner side surface 220 a of each elastic arm 220 , and the hooks 223 engage the outer edge of the bearing 300 to fix the bearing 300 in the second outer tube 210 .

The second docking end 211 is plugged into the first docking end 111 through the opening 101, the inner thread 112 is screwed to each outer tooth structure 222, and the outer thread 221 is screwed to the inner thread 112, thereby connecting the first outer tube 110 to the second Two outer tubes 210. One end of the driving screw 230 protrudes from the first outer tube 110 to abut against the driving unit 130 , and the driving screw 230 is arranged coaxially with the motor of the driving unit 130 . The first outer tube 110 and the second outer tube 210 can be further welded and fixed. In this embodiment, the joint surface 224 is attached to the inner wall of the first outer tube 110, specifically to the opening 101 and the inner thread 112. The region between them, and the bonding surface 224 and the inner wall of the first outer tube 110 are fixed to each other by means of laser welding, high frequency bonding or bonding agent.

In summary, the driving unit 130 of the electric support rod of the present invention can be pre-assembled to the first outer tube 110, the telescopic sleeve set 240, the drive screw 230 and the bearing 300 can be pre-assembled to the second outer tube 210, and then the second outer tube 210 can be pre-assembled. The docking of the first outer tube 110 and the second outer tube 210 enables the driving screw 230 to be connected to the driving unit 130 by power. The second outer tube 210 has an elastic arm 220, and the inner and outer sides of the elastic arm 220 are respectively provided with a hook portion 223 and an outer tooth structure 222. The bearing 300 is inserted into the second outer tube 210 and is fixed by the hook portion 223 to avoid falling off, so it is convenient for further use. Connect the second outer tube 210 to the first outer tube 110 . Moreover, after the second outer tube 210 is docked with the first outer tube 110 , the elastic arm 220 can be positioned by the inner arm of the first outer tube 110 to press against the outer edge of the bearing 300 .

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Other equivalent changes using the patent spirit of the present invention shall all fall within the patent scope of the present invention.

100: drive components

101: opening

110: The first outer tube

111: the first docking end

112: Internal thread

130: drive unit

200: actuation assembly

210: Second outer tube

211: the second butt end

220: spring arm

221: External thread

222: External tooth structure

223: hook

230: drive screw

232: tenon

240:Telescopic sleeve group

241: Nut

300: bearing

Claims (9)

An electric support rod, comprising: a drive assembly, including a first outer tube and a drive unit accommodated in the first outer tube, the first outer tube has a first butt end and the first butt end An inner thread is provided on the inner wall; an actuating component includes a second outer tube and a drive screw threaded in the second outer tube, the second outer tube has a second butt end and connects from the second A plurality of elastic arms arranged at intervals around the drive screw extend axially from the end, each of the elastic arms has an inner surface facing the drive screw and an outer surface facing away from the drive screw, and each of the outer surfaces is respectively provided with an outer surface. tooth structure, each inner surface is protruded with a hook portion, the second butt end is inserted into the first butt end, the inner thread is screwed to each outer tooth structure, and one end of the transmission screw protrudes from the first An outer tube is connected to the drive unit; and a bearing is sleeved on the drive screw and the hooks are clamped to the outer edge of the bearing. The electric support rod as claimed in claim 1, wherein the outer edge of the bearing is attached to the inner surface of each elastic arm. The electric support rod as described in claim 1, wherein the actuating assembly further includes a telescopic sleeve set that is passed through the second outer tube and sleeved on the drive screw, and the telescopic sleeve set has a screw connection to the A nut of the drive screw. The electric support rod as described in claim 1, wherein the drive screw is provided with a drive screw, the drive screw is provided with a tenon inserted transversely into the drive screw, and the bearing is clamped at one end of the drive screw and between the tenons. The electric support rod as claimed in item 1, wherein each of the outer tooth structures respectively includes a plurality of parallel tooth segments, and the tooth segments of the outer tooth structures are arranged on the same helical line matched with the inner thread . The electric support rod according to claim 5, wherein the outer wall of the second outer tube has an external thread connected to any of the external tooth structures, and the external thread and the tooth segments of the external tooth structures are arranged at On the same helix that matches the internal thread. The electric support rod according to claim 6, wherein the outer wall of the second outer tube has a joint surface, the joint surface is attached to the inner wall of the first outer tube, and the external thread is arranged on the joint surface and the Between some external tooth structures and screwed to the internal thread. The electric support rod as claimed in claim 1, wherein the outer wall of the second outer tube has a joint surface, and the joint surface is attached to the inner wall of the first outer tube. The electric support rod according to claim 7 or 8, wherein the joint surface is a circular curved surface surrounding the side surface of the second outer tube.

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