Jacking pipe for electric push rod

Abstract

The utility model relates to the technical field of electric push rods, in particular to a jacking pipe for an electric push rod. The utility model discloses a top pipe for an electric push rod, which comprises a top pipe main body, a cavity is arranged in the top pipe main body, a threaded section is arranged in the cavity along one axial end of the top pipe main body, and a plugging head is arranged at one axial end, far away from the threaded section, of the top pipe main body. The plugging head and the pipe jacking body are of an integrated structure. The pipe jacking device has the advantage that the sealing performance of the pipe jacking is ensured in the telescopic movement process of the electric push rod.

Description

Technical Field

[0001] This utility model relates to the field of electric linear actuator technology, specifically a top tube for an electric linear actuator. Background Technology

[0002] Chinese patent application No. 201620936795.1 discloses a waterproof sealing structure for an electric actuator, including a housing, a housing cover, a motor, and a lead screw. The motor is fixedly mounted to the housing. The front end of the lead screw is fixed relative to the housing, and the rear end of the lead screw extends to the outside of the housing. A nut fitted on the lead screw is fixed to a top tube. A guide tube is fitted over the top tube and fixed to the housing. The lead screw rotates to make the top tube reciprocate axially relative to the guide tube. A plug is fixed to the end of the top tube away from the housing. The plug is pressed into the top tube and abuts against the inner wall of the top tube.

[0003] In the above technical solution, a plug is used to waterproof one end of the jacking pipe to prevent rainwater and other liquids from entering the electric push rod from the end of the jacking pipe away from the housing. However, in the above technical solution, the plug and the jacking pipe are two parts assembled with an interference fit, and there is still a gap between them. The existing solution for this gap is to fill the gap with an adhesive and use the adhesive properties of the adhesive to reinforce the plug and the jacking pipe. However, due to the actual error in the workpiece processing, it is difficult to guarantee the interference fit between the plug and the jacking pipe. When the interference fit between the plug and the jacking pipe is large, the filling medium between the plug and the jacking pipe will be squeezed into the jacking pipe. When the interference fit between the plug and the jacking pipe is small, the assembly effect between the plug and the jacking pipe cannot be guaranteed, making it difficult to achieve waterproof sealing in the actual use of the electric push rod. Utility Model Content

[0004] The purpose of this invention is to provide a sealed jacking pipe for electric push rods that can eliminate the gaps between the plug and the jacking pipe caused by assembly, thereby ensuring the sealing effect inside the jacking pipe.

[0005] To achieve the above objectives, this utility model discloses a jacking tube for an electric push rod, comprising a jacking tube body, a cavity inside the jacking tube body, a threaded section at one end of the cavity along the axial direction of the jacking tube body, and a sealing head at one end of the jacking tube body away from the threaded section, wherein the sealing head and the jacking tube body are integrally structured.

[0006] During the process of the electric push rod driving the object to be moved to move in a straight line through the jacking pipe body, the jacking pipe body is connected to the screw nut through the threaded section. The screw nut drives the jacking pipe body to move in a straight line, thereby using the jacking pipe body to drive the object to be moved to move in a straight line; the one-piece machined sealing head can eliminate the gaps between it and the jacking pipe body caused by assembly.

[0007] In this utility model, the jacking pipe body and the sealing head adopt an integrated structural design, that is, a whole component processed by the same process. This fundamentally eliminates the gap problem caused by the assembly of two independent components, thereby effectively avoiding the risk of rainwater and other liquids seeping into the electric push rod through the gap. This utility model has the advantage of ensuring the sealing of the jacking pipe during the extension and retraction of the electric push rod.

[0008] The sealing head and the jacking pipe body are made of aluminum material through a deep drawing process to achieve integral molding.

[0009] Preferably, the sealing head has a through hole that extends radially through the main body of the jacking pipe.

[0010] Compared to connecting the object to be moved to the sealing head of the jacking pipe body through an interference fit, assembling the object to be moved to the sealing head of the jacking pipe body through a connector is more stable; the connector and the through hole can make a certain angle between the jacking pipe body and the object to be moved.

[0011] The connector can be any existing columnar structure used to connect the object to be moved to the main body of the jacking pipe.

[0012] Preferably, the sealing head has a threaded hole, providing another assembly method for assembling the object to be moved with the jacking pipe body, thereby improving the applicability of the device.

[0013] Preferably, the side of the sealing head away from the cavity from the through hole is the thrust part, and the wall thickness between the through hole and the cavity is less than the thickness of the thrust part, thereby ensuring the structural strength of the sealing head when the jacking pipe body provides push / pull force.

[0014] Preferably, the end of the cavity away from the threaded section is provided with a rounded chamfer structure.

[0015] The rounded chamfer structure allows for a more uniform stress distribution on the aluminum surface by the mold core during deep drawing. Compared to the vertical structure formed between the sidewalls and the bottom wall, it increases the punching force required for the mold core to cut the aluminum, thus preventing the aluminum from being cut.

[0016] This invention can eliminate the gap problem caused by the assembly of two independent components between the sealing head and the jacking pipe body, and has the advantage of ensuring the sealing of the jacking pipe during the telescopic movement of the electric push rod. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of one structure of the present utility model.

[0018] Figure 2 This is a front view structural diagram of the present invention.

[0019] Figure 3 for Figure 2 A schematic diagram of the cross-sectional structure along the AA direction.

[0020] Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point C.

[0021] Figure 5 for Figure 2 Schematic diagram of the cross-sectional structure in the middle BB direction.

[0022] In the diagram: 11. Main body of the jacking pipe; 111. Bottom wall; 112. Thrust section; 12. Cavity; 121. Threaded section; 122. Rounded chamfer structure; 13. Through hole; 14. Threaded hole; 15. Sealing head. Detailed Implementation

[0023] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0024] Depend on Figure 1 , Figure 2 , Figure 3 As shown, this embodiment discloses a jacking tube for an electric push rod, including a jacking tube body 11. The jacking tube body has a cavity 12 inside. A threaded section 121 is provided at one end of the cavity 12 along the axial direction of the jacking tube body 11. The jacking tube body 11 is connected to a lead screw nut through the threaded section 121. A sealing head 15 is provided at one end of the jacking tube body 11 away from the threaded section 121. The sealing head 15 and the jacking tube body 11 are processed into an integral structure by a deep drawing process.

[0025] Depend on Figure 5 As shown, the sealing head 15 has a through hole 13 that extends radially through the jacking pipe body 11. The sealing head 15 also has a threaded hole 14 perpendicular to the through hole 13. The through hole 13 and the threaded hole 14 allow the user to assemble the object to be moved with the sealing head 15 via a connector. The connector is the same as any existing structure for connecting the object to be moved to the jacking pipe body 11.

[0026] In the sealing head 15, the side of the through hole 13 away from the cavity 12 is the thrust part 112, and the space between the through hole 13 and the cavity 12 is the bottom wall 111. The wall thickness of the bottom wall 111 is less than the thickness of the thrust part 112.

[0027] Depend on Figure 4 As shown, the cavity 12 has a rounded chamfer structure 122 at the end away from the threaded section 121.

[0028] The object to be moved is installed onto the sealing head 15 via a connector. When the electric push rod is working, the power component of the electric push rod drives the jacking pipe body 11 to move linearly back and forth through the screw nut. Thus, the sealing head 15 transmits power through the connector, driving the object to be moved to move linearly back and forth. At this time, since the sealing head 15 and the jacking pipe body 11 are processed into an integral structure through a deep drawing process, there will be no gap between the sealing head 15 and the jacking pipe body 11 due to the assembly of two independent parts. This prevents rainwater and other liquids from seeping into the electric push rod through the gaps created by the assembly of the sealing head 15 and the jacking pipe body 11 in the prior art.

Claims

1. A jacking tube for an electric actuator, comprising a jacking tube body, wherein the jacking tube body has a cavity inside, characterized in that: The cavity is provided with a threaded section at one end along the axial direction of the jacking pipe body, and a sealing head is provided at the axial end of the jacking pipe body away from the threaded section. The sealing head and the jacking pipe body are integrally structured.

2. The jacking tube for an electric actuator according to claim 1, characterized in that: The sealing head has a through hole that extends radially through the main body of the jacking pipe.

3. The jacking tube for an electric actuator according to claim 2, characterized in that: The sealing head has a threaded hole inside.

4. A jacking tube for an electric actuator according to claim 3, characterized in that: In the sealing head, the side of the through hole away from the cavity is the thrust part, and the wall thickness between the through hole and the cavity is less than the thickness of the thrust part.

5. A jacking tube for an electric actuator according to claim 4, characterized in that: The cavity has a rounded chamfered structure at the end away from the threaded section.

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