CN209937255U

CN209937255U - Tensioning type positioning shaft for installing embedded sleeve of high-speed rail sleeper

Info

Publication number: CN209937255U
Application number: CN201920365534.2U
Authority: CN
Inventors: 郑翼
Original assignee: Beijing Haoyunda Zhichuang Technology Co Ltd
Current assignee: Beijing Haoyunda Zhichuang Technology Co Ltd; Good Luck Innovative Intelligence Technology Co Ltd
Priority date: 2019-03-21
Filing date: 2019-03-21
Publication date: 2020-01-14
Anticipated expiration: 2029-03-21

Abstract

The utility model discloses a tension type positioning shaft for installing a pre-buried sleeve of a high-speed rail sleeper, which comprises a main shaft and a shaft sleeve which are coaxially arranged, wherein the middle part of the shaft sleeve is provided with a plurality of telescopic holes; the spindle is sleeved with an upper bottom plate and a lower bottom plate, an upper pre-tightening spring, an upper conical surface pressing head, a lower pre-tightening spring and a plurality of tensioning grippers are arranged between the upper bottom plate and the lower bottom plate, the upper pre-tightening spring, the upper conical surface pressing head, the lower conical surface pressing head and the lower pre-tightening spring are sequentially sleeved on the spindle from top to bottom, and the tensioning grippers are arranged between the upper conical surface pressing head and the lower conical surface pressing head. The utility model discloses after the sleeve pipe installation targets in place, can realize rising tightly the sheathed tube, during the drawing of patterns, upset sleeper mould, the sleeper can drive the sleeve pipe under the action of gravity and break away from with the location axle, has avoided the work of artifical dismouting location axle, can accomplish once to install long-term the use, not only is favorable to improving production efficiency, still has very high economic benefits.

Description

Tensioning type positioning shaft for installing embedded sleeve of high-speed rail sleeper

Technical Field

The utility model relates to a sleeper manufacturing technical field especially relates to a tight formula location axle that rises for installing high-speed railway sleeper embedded casing.

Background

The embedded sleeve of the sleeper is required to be vertical and tightly attached to the bottom of a mould during production, and cannot be loosened in later material distribution, vibration and other process links so as to prevent cement from entering the inside of the sleeve to cause defective products. And in the final demoulding link, the sleeve is required to be smoothly taken off from the positioning shaft. The fixation of the sleeve cannot be too loose nor too tight. The mounting and positioning modes of the embedded sleeve in the existing sleeper production mainly comprise two modes:

one is a plastic positioning shaft, and the outer side of the positioning shaft is provided with a thread matched with the sleeve. The positioning shaft is fixed on a preformed hole at the bottom of the steel die in advance. When the sleeper is produced, the sleeve is screwed on the positioning shaft. When the sleeper is demoulded, the purpose of separating the sleeve from the positioning shaft is achieved by utilizing the drawing force generated by the gravity of the sleeper and the elastic shrinkage of the plastic material of the positioning shaft. The positioning shaft has the advantages that the sleeve is simple and convenient to mount during production, and the positioning shaft is short in service life and easy to damage due to the fact that the plastic material of the positioning shaft needs to be replaced frequently.

The other type is a metal bolt type positioning shaft, namely when the sleeve is installed, the positioning shaft is temporarily installed on a preformed hole at the bottom of the die, and then the sleeve is screwed on the positioning shaft. When demoulding, the positioning shaft is unscrewed from the sleeve and the mould to relieve the resistance of demoulding the sleeper. The positioning shaft has the advantages of being made of metal and long in service life; the defects are that the positioning shaft needs to be installed and detached in each mould production, the steps are multiple, the operation is complex, and the production efficiency is greatly reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a tight formula location axle that rises for installing high-speed railway sleeper embedded casing.

In order to achieve the above purpose, the technical scheme of the utility model is that: a tensioning type positioning shaft for mounting a pre-buried sleeve of a high-speed rail sleeper comprises a main shaft and a shaft sleeve which are coaxially arranged, wherein a plurality of telescopic holes are formed in the middle of the shaft sleeve and are circumferentially arranged along the shaft sleeve; the spindle is sleeved with an upper bottom plate and a lower bottom plate, the lower bottom plate is arranged at the bottom of the spindle sleeve and fixedly connected with the spindle, and the upper bottom plate is arranged on the inner wall of the upper end of the spindle sleeve and fixedly connected with the spindle; an upper pre-tightening spring, an upper conical surface pressing head, a lower pre-tightening spring and a plurality of tensioning grippers are arranged between the upper base plate and the lower base plate, the upper pre-tightening spring, the upper conical surface pressing head, the lower conical surface pressing head and the lower pre-tightening spring are sequentially sleeved on the main shaft from top to bottom, the tensioning grippers are arranged between the upper conical surface pressing head and the lower conical surface pressing head and are uniformly arranged along the radial direction of the main shaft, and the upper conical surface pressing head and the lower conical surface pressing head are movably matched with the tensioning grippers under the elastic force action of the upper pre-tightening spring and the lower pre-tightening spring to extrude the tensioning grippers to penetrate through corresponding telescopic;

the spindle is also sleeved with a limiting plate and a positioning nut, the limiting plate is arranged at the upper end of the spindle sleeve and is fixed through the positioning nut, and the limiting plate is matched with the lower bottom plate to form axial support of the spindle sleeve; a chamfer is arranged at one end of the tensioning hand grip penetrating through the telescopic hole; the outer wall of the upper end of the shaft sleeve is provided with a necking, and the diameter of the limiting plate is smaller than the outer diameter of the upper opening of the shaft sleeve.

The utility model has the advantages that: the utility model provides a tight formula location axle that rises for installing high-speed railway sleeper embedded casing, this location axle pass through the main shaft lower extreme and install on the preformed hole of sleeper mould, during the installation sleeve pipe, the tight tongs that rises extrudes under sheathed tube radial pressure effect conical surface pressure head, lower conical surface pressure head, and the pretension spring goes upward on the extrusion of last conical surface pressure head, and pretension spring is down extruded down to lower conical surface pressure head, and the tight tongs that rises radially draws in, realizes the sheathed tube installation. After the sleeve is installed in place, the upper pre-tightening spring and the lower pre-tightening spring apply pressure to the tensioning gripper through the upper conical surface pressure head and the lower conical surface pressure head to tension the sleeve. During the drawing of patterns, upset sleeper mould, the sleeper can drive the sleeve pipe and break away from with the location axle under the action of gravity, has avoided the work of artifical dismouting location axle, can accomplish once to install long-term the use, not only is favorable to improving production efficiency, still has very high economic benefits.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic diagram of the internal structure of the present invention.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

As shown in fig. 1-2, the tension type positioning shaft for installing the embedded sleeve of the high-speed rail sleeper comprises a main shaft 1 and a shaft sleeve 2 which are coaxially arranged, wherein a plurality of telescopic holes 3 are formed in the middle of the shaft sleeve 2, and the telescopic holes 3 are circumferentially arranged along the shaft sleeve 2; an upper bottom plate 4 and a lower bottom plate 5 are sleeved outside the main shaft 1, the lower bottom plate 5 is arranged at the bottom of the shaft sleeve 2 and fixedly connected with the main shaft 1, and the upper bottom plate 4 is arranged on the inner wall of the upper end of the shaft sleeve 2 and fixedly connected with the main shaft 1; an upper pre-tightening spring 6, an upper conical surface pressure head 7, a lower conical surface pressure head 8, a lower pre-tightening spring 9 and a plurality of tensioning grippers 10 are arranged between the upper base plate 4 and the lower base plate 5, the upper pre-tightening spring 6, the upper conical surface pressure head 7, the lower conical surface pressure head 8 and the lower pre-tightening spring 9 are sequentially sleeved on the main shaft 1 from top to bottom, the tensioning grippers 10 are arranged between the upper conical surface pressure head 7 and the lower conical surface pressure head 8 and are uniformly arranged along the radial direction of the main shaft 1, the upper conical surface pressure head 7 and the lower conical surface pressure head 8 are movably matched with the tensioning grippers 10 under the elastic force action of the upper pre-tightening spring 6 and the lower pre-tightening spring 9 to extrude the tensioning grippers 10 to penetrate;

a limiting plate 11 and a positioning nut 12 are further sleeved outside the main shaft 1, the limiting plate 11 is arranged at the upper end of the shaft sleeve 2 and is fixed through the positioning nut 12, and the limiting plate 11 is matched with the lower bottom plate 5 to form axial support of the shaft sleeve 2; a chamfer is arranged at one end of the tensioning hand grip penetrating through the telescopic hole 3 10; the outer wall of the upper end of the shaft sleeve 2 is provided with a necking, and the diameter of the limiting plate 11 is smaller than the outer diameter of the upper opening of the shaft sleeve 2.

The positioning shaft is arranged on a prepared hole of the sleeper mould through the lower end of the main shaft 1.

When the sleeve is installed, the tensioning gripper 10 extrudes the upper conical surface pressing head 7 and the lower conical surface pressing head 8 under the action of the radial pressure of the sleeve 2, the upper conical surface pressing head 7 extrudes the upper pre-tightening spring 6 and moves upwards, the lower conical surface pressing head 8 extrudes the lower pre-tightening spring 9 and moves downwards, and the tensioning gripper 10 is radially folded to realize the installation of the sleeve. After the sleeve is installed in place, the upper pre-tightening spring 6 and the lower pre-tightening spring 9 apply pressure to the tensioning gripper 10 through the upper conical surface pressure head 7 and the lower conical surface pressure head 8 to tension the sleeve. During the drawing of patterns, upset sleeper mould, the sleeper can drive the sleeve pipe and break away from with the location axle under the action of gravity, has avoided the work of artifical dismouting location axle, can accomplish once to install long-term the use, not only is favorable to improving production efficiency, still has very high economic benefits.

The described embodiments are only some, but not all embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Claims

1. A tensioning type positioning shaft for mounting a pre-buried sleeve of a high-speed rail sleeper is characterized by comprising a main shaft and a shaft sleeve which are coaxially arranged, wherein the middle part of the shaft sleeve is provided with a plurality of telescopic holes which are circumferentially arranged along the shaft sleeve; the spindle is sleeved with an upper bottom plate and a lower bottom plate, the lower bottom plate is arranged at the bottom of the spindle sleeve and fixedly connected with the spindle, and the upper bottom plate is arranged on the inner wall of the upper end of the spindle sleeve and fixedly connected with the spindle; an upper pre-tightening spring, an upper conical surface pressing head, a lower pre-tightening spring and a plurality of tensioning grippers are arranged between the upper base plate and the lower base plate, the upper pre-tightening spring, the upper conical surface pressing head, the lower conical surface pressing head and the lower pre-tightening spring are sequentially sleeved on the main shaft from top to bottom, the tensioning grippers are arranged between the upper conical surface pressing head and the lower conical surface pressing head and are uniformly arranged along the radial direction of the main shaft, and the upper conical surface pressing head and the lower conical surface pressing head are movably matched with the tensioning grippers under the elastic force action of the upper pre-tightening spring and the lower pre-tightening spring to extrude the tensioning grippers to penetrate through corresponding telescopic;