Forming method for positioning structure of extension tube
A positioning structure and telescopic tube technology, applied in the connection of rods, connecting components, mechanical equipment, etc., can solve the problems of affecting the smoothness of gear rotation, damaging the strength of the inner tube wall, and reducing the load capacity of the supporting structure.
Inactive Publication Date: 2011-06-22
黄汉卿
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Problems solved by technology
However, because the distance between the entire row of holes is too short, it will damage the wall strength of the inner tube and reduce the load capacity of the supporting structure; secondly, the wall surface of the step holes interferes with the teeth's sinking or withdrawing, which affects the smoothness of the gear rotation
Method used
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Embodiment Construction
[0044] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0045] see Figure 4 The production process shown, with the Figure 5a , 5b Regarding the specific shape of the positioning structure related to 5c, the forming step includes:
[0046] Cutting tube length 40: Cut the tube body to the required length; for the telescopic tube of the pole, the diameter of the tube body must ensure that it can be inserted into the outer tube. In other words, the tube body after cutting is An inner tube that acts as a telescoping tube.
[0047] The first extraction 41: For the pipe body cut in the previous steps, use the forming equipment to form several step grooves 50 on the pipe wall A. The above step grooves 50 are arranged equidistantly on the pipe wall A, and the step grooves The depth S1 between 50 and the outer surface of the pipe body is relatively shallow. exist Figure 5a Among them, the step groove 50 form...
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The invention discloses a forming method for a positioning structure of an extension tube. The method comprises the following steps of: cutting a tube: cutting a tube body to a required length; primary drawing: drawing the tube wall of the cut tube body to form a plurality of step slots by using forming equipment, and arraying the step slots on the tube wall at equal intervals, wherein the depth between the step slots and the outer surface of the tube body is shallow; secondary drawing: executing actions of increasing the depth on the step slots formed by carrying out the primary drawing on the tube body by using the forming equipment; and positioning structure forming: carrying out multiple times of drawing on the tube body to obtain step slots with required depths on the tube wall. In the invention, the positioning structure with a required depth is gradually formed on the tube wall through a drawing technology in the field of metal forming, which eliminates slide phenomena to ensure that the bridle joint relation is more stable.
Description
technical field [0001] The invention belongs to the technical field of forming a positioning structure, in particular to a forming method for a positioning structure of a telescopic tube. Background technique [0002] Telescopic tubes are common in various items in life, such as figure 1 In the truck 10 shown, many boxes of cargo 11 are stacked inside the cabinet 12, and at least one strut 13 is maintained between the two opposite walls of the cabinet 12 to offset the stacked cargo 11 to prevent the cargo 11 from falling and being damaged. [0003] from figure 2 It can be seen that the strut 13 of the Chinese Taiwan No. M337649 patent case includes a telescopic tube 20 and a control device 30 installed in the middle of the telescopic tube 20, and the telescopic tube 20 is composed of an inner tube 21 inserted into an outer tube 22 , and the outer surface of the inner tube 21 forms a row of step grooves 23 , the distance between these step grooves 23 is equal, and has a me...
Claims
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IPC IPC(8): B21D31/00F16B7/14
Inventor 黄汉卿
Owner 黄汉卿