Positioning device convenient to replace

Abstract

A positioning device convenient to replace is used for solving the problems that a mold positioning pin is difficult to operate and high in risk when being replaced after being abraded, achieves the purposes of being convenient to replace, easy to operate and safer, and specifically comprises a positioning pin and a positioning sleeve which are both in a cylindrical shape, and the center of each of the positioning pin and the positioning sleeve is provided with a screw hole, a split section, a cavity, a loose piece and other structures. The positioning device can be conveniently disassembled and replaced through simple operations such as bolt screwing and the like, and can be used as a substitute product of a traditional positioning pin.

Description

Technical Field

[0001] The invention relates to the field of mold positioning pins, and in particular to a positioning device that can be easily replaced. Background Art

[0002] At present, after a period of use, the locating pins on the mold will produce a certain degree of wear at the pin joint, affecting the accuracy of use. Since the mold locating pins are generally installed in the pre-processed mounting holes (also called locating holes) on the mold by means of shaft hole interference fitting, it is troublesome to replace the locating pins, because the mounting holes are generally blind holes, and in order not to affect the normal opening and closing of the mold, the locating pins are generally designed to be hidden. The part exposed to the outside is small, and it is difficult to pull the locating pins or locating sleeves out of the mold mounting holes with common tools. If the locating pins need to be replaced, the operation is quite difficult, and the operation is generally manual, which is time-consuming and labor-intensive. If you are not careful, it is likely to cause varying degrees of damage to the mold surface and the mold locating holes. After replacement, the interference fitting gap between the shaft holes may become larger. When used again, the locating pins are easy to loosen and fall off, which may eventually cause the mold to be scrapped, increasing costs and safety risks. Summary of the invention

[0003] The technical problem to be solved by the present application is to provide a positioning device that can be easily replaced to solve the problem of difficult operation and high risk when replacing the mold positioning pins, so as to achieve a simple, easy to operate, safer and more convenient replacement process.

[0004] A positioning device that can be easily replaced specifically includes a positioning pin and a positioning sleeve. The positioning pin and the positioning sleeve are both cylindrical in shape, and are provided with a screw hole, a petal, a cavity, and a movable block structure in the center. The positioning device can be conveniently installed and disassembled by tightening the bolts once, and can be used as a substitute for traditional positioning pins. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] Figure 1 The present invention is a schematic cross-sectional view of a positioning device structure that can be easily replaced.

[0006] Figure 2 Schematic diagram of the locating pin installed in the locating hole.

[0007] Figure 3 The figure shows the removal of the positioning pin.

[0008] Figure 4 This is a schematic diagram of the positions of the locating pins and locating sleeves in the upper and lower molds after the mold is closed.

[0009] Figure 5 This is a schematic diagram of the locating sleeve being installed in the locating hole.

[0010] Figure 6 This is a schematic diagram for removing the positioning sleeve.

[0011] Figure 7 It is a three-dimensional schematic diagram of a positioning device that can be easily replaced.

[0012] The numbers in the figure are: 1-locating pin body; 101-nut avoidance hole; 102-first screw hole; 103-first cavity; 104-petal; 105-petal groove; 106-small round hole; 107-arc groove; 108-gradient head; 11-first loose block; 111-second screw hole; 12-second bolt; 13-lower mold; 131-lower mold positioning hole; 14-first bolt; 2-locating sleeve body; 201-pin joint inner hole; 202-third screw hole; 203-second cavity; 204-petal; 205-petal groove; 206-small round hole; 207-arc groove; 21-second loose block; 211-fourth screw hole; 22-fourth bolt; 23-upper mold; 231-upper mold positioning hole; 24-third bolt. DETAILED DESCRIPTION

[0013] A conveniently replaceable positioning device specifically comprises a positioning pin and a positioning sleeve.

[0014] A positioning device that can be easily replaced, wherein the positioning pin is cylindrical in shape, the outer edge of the upper end is provided with a head that is smoothly transitioned and gradually reduced, the lower end is cylindrical in shape, a nut avoidance hole is provided at the center of the upper end, a first screw hole is provided at the center of the bottom of the nut avoidance hole, the first screw hole is connected to the first cavity at the bottom, the inner wall of the first cavity has an inclination, a petal structure is provided outside the first cavity, the petal structure includes petals and petal grooves, the root of the petal groove has a small circular hole and a circular arc groove along the circumference of the positioning pin, a first movable block is provided in the first cavity, and the first movable block The shape is a flat-top cone. The taper of the first movable block matches and fits with the slope of the inner wall of the first cavity. A second screw hole is provided in the center of the first movable block. The specification of the second screw hole is one specification smaller than the first screw hole (for example, if the first screw hole is M8, the second screw hole is M6, and so on). When installing, first put the locating pin installation part into the installation hole (or locating hole) on the mold, and then insert the second bolt at the top. The second bolt is screwed into the second screw hole. When the second bolt is tightened to the bottom of the nut avoidance hole, the nut of the second bolt stops. Stop moving downward, continue to tighten the second bolt, at this time the movable block moves upward, the initial position of the movable block is the bottom of the first cavity, as the second bolt is tightened, the first movable block continues to move upward, the petal structure will be force dispersed and expanded, so as to be tightened with the mounting hole, at this time the locating pin is installed, the mounting hole is a circular blind hole on the mold body, also known as a locating hole, the depth of which is adapted to the installation position of the locating pin; when the locating pin needs to be replaced, unscrew the second bolt, and screw the first bolt into the first screw hole, as the first bolt is screwed in, the tip of the first bolt will first contact the first movable block, and then the first movable block will be moved from the upper part of the first cavity to the lower part, releasing the supporting force between the petal and the mounting hole, and then the first movable block will contact the bottom of the mounting hole, at this time the first movable block acts as a cushion block, continue to tighten the first bolt, the locating pin is slowly pushed out of the mounting hole along the thread, after taking out the movable block with tweezers, the old locating pin is disassembled, and then a new locating pin is installed, and the second bolt is tightened, and the locating pin replacement process is completed.

[0015] A positioning device that can be easily replaced, wherein the positioning sleeve has a cylindrical shape, and a pin-engaging inner hole that is pinned to the positioning pin is provided at the center of the upper end, and a third screw hole is provided at the center of the bottom of the pin-engaging inner hole, and the third screw hole is connected to the second cavity at the bottom, and the inner wall of the second cavity has an inclination, and a petal structure is provided outside the second cavity, and the petal structure includes petals and petal grooves, and the root of the petal groove has a small circular hole and an arc groove along the circumference of the positioning sleeve, and a second movable block is provided in the second cavity, and the second movable block has a flat-topped cone shape, and the taper of the second movable block matches and fits with the inclination of the inner wall of the second cavity, and a fourth screw hole is provided in the center of the second movable block, and the specification of the fourth screw hole is one specification smaller than the third screw hole (for example, the third screw hole uses M8, and the fourth screw hole uses M6, and so on). When installing, first put the mounting part of the positioning sleeve into the mounting hole on the mold, and then insert the fourth bolt at the top, and the fourth bolt is screwed into the fourth screw hole. When the fourth bolt is tightened to the bottom of the hole where the nut avoids, the nut of the fourth bolt stops moving downward, and the fourth screw continues to be tightened The second movable block moves upward at this time, and the initial position of the second movable block is the bottom of the cavity. As the fourth bolt is tightened, the second movable block continues to move upward, and the petal structure will be force dispersed and expanded, thereby being supported tightly with the mounting hole. At this time, the positioning sleeve is installed. The mounting hole is a circular blind hole on the mold body, also known as a positioning hole, and its depth is adapted to the installation position of the positioning sleeve; when the positioning sleeve needs to be replaced, the fourth bolt is unscrewed, and the third bolt is screwed into the third screw hole. As the third bolt is screwed in, the tip of the third bolt will first contact the second movable block, and then the second movable block will be moved from the upper part of the second cavity to the lower part, releasing the supporting force between the petal and the mounting hole, and then the second movable block will contact the bottom of the mounting hole. At this time, the second movable block acts as a cushion block, and the third bolt is continued to be tightened, and the positioning sleeve is slowly pushed out of the mounting hole. After taking out the movable block with tweezers, the old positioning pin is disassembled, and then a new positioning pin is installed, and the second bolt is tightened, and the positioning sleeve replacement process is completed.

[0016] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A positioning device that can be easily replaced, characterized in that it includes a positioning pin and a positioning sleeve, the positioning pin includes a cylindrical positioning pin body, the outer edge of the upper end of the positioning pin body is provided with a head that smoothly transitions and gradually shrinks, the center of the upper end of the positioning pin body is provided with a nut avoidance hole, the center of the bottom of the nut avoidance hole is provided with a first screw hole, a first cavity is provided under the first screw hole, the inner wall of the first cavity has an inclination, the outside of the first cavity has a petal structure, the petal structure includes petals and petal grooves, the root of the petal groove has a small circular hole and a circular arc groove along the circumference of the positioning pin, a first movable block is provided in the first cavity, the first movable block has a flat-top cone shape, the taper of the first movable block matches and fits with the inclination of the inner wall of the first cavity, and the center of the first movable block is provided with A second screw hole, the specification of the second screw hole is one specification smaller than that of the first screw hole; the positioning sleeve comprises a cylindrical positioning sleeve body, the center of the upper end of the positioning sleeve body is provided with a pinning inner hole which is pinned to the positioning pin, the center of the bottom of the pinning inner hole is provided with a third screw hole, a second cavity is provided under the third screw hole, the inner wall of the second cavity has an inclination, a petal structure is provided outside the second cavity, the petal structure comprises petals and petal grooves, the root of the petal grooves has small circular holes and circular arc grooves along the circumference of the positioning sleeve, a second movable block is provided in the second cavity, the outer shape of the second movable block is a flat-topped cone, the taper of the second movable block matches and fits with the inclination of the inner wall of the second cavity, a fourth screw hole is provided in the center of the second movable block, the specification of the fourth screw hole is one specification smaller than that of the third screw hole.

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