CN216680243U

CN216680243U - Main shaft structure with telescopic core rod

Info

Publication number: CN216680243U
Application number: CN202123140738.2U
Authority: CN
Inventors: 于跃; 何庆洋; 张尚宗; 杜军锋; 吴晓宇; 武文斌; 赵德峰
Original assignee: Dalian Yuanhong Machinery Co ltd
Current assignee: Dalian Yuanhong Machinery Co ltd
Priority date: 2021-12-15
Filing date: 2021-12-15
Publication date: 2022-06-07
Anticipated expiration: 2031-12-15

Abstract

The utility model discloses a main shaft structure with a telescopic core rod, which comprises a box body, wherein a main shaft body is arranged on the box body through a bearing, a bearing cover is arranged outside the bearing, an installation flange surface connected with a cutter rod is arranged at the end head of the main shaft body, guide sleeves are respectively fixed at two ends of an inner hole of the main shaft body, a core rod is arranged in the inner hole of the guide sleeve, one end of the core rod extends out of the guide sleeve at one end, the outer surface of the extending end of the core rod is an outer conical surface, the taper angle A is 13-18 degrees, the inner surface of a center hole of the end head, connected with the main shaft body, of the cutter rod is an inner conical surface and is matched with the outer conical surface of the core rod, a spring is sleeved on the core rod, one end of the spring abuts against the guide sleeve at one end close to the outer conical surface, the other end of the spring abuts against a limiting sleeve, the limiting sleeve is fixedly sleeved on the core rod, a long bolt is arranged in the inner hole of the core rod, and the front end thread part of the long bolt is in threaded connection with the center hole of the cutter rod. Simple structure, but quick replacement cutter arbor has improved work efficiency, has reduced the work piece processing cost.

Description

Main shaft structure with telescopic core rod

Technical Field

The utility model relates to a main shaft structure, in particular to a main shaft structure with a telescopic core rod for frame tooling equipment.

Background

The main shaft structure of the serial milling cutter and the multi-gear grooving machine tool in the machining equipment comprises a box body, a main shaft body is installed on the box body through a bearing, a bearing cover is installed on the outer side of the bearing, an installation flange surface connected with a cutter bar is arranged at the end of the main shaft body, and a spigot structure matched with each other is arranged on the installation flange surface and the end of the cutter bar in a connection centering mode. When changing blade or cutter arbor, need earlier the cutter arbor axial displacement break away from with the centering tang of main shaft, then just can radially demolish the cutter arbor, spare parts such as cutter arbor supporting component just are dismantled to the mode like this, lead to the dismouting to waste time and energy, influence work efficiency, the processing cost is high.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a main shaft structure with a telescopic core rod, which is simple in structure, can quickly replace a cutter bar, improves the working efficiency and reduces the processing cost of workpieces.

The utility model discloses a main shaft structure with a telescopic core rod, which comprises a box body, wherein a main shaft body is arranged on the box body through a bearing, a bearing cover is arranged outside the bearing, an installation flange surface connected with a cutter rod is arranged at the end head of the main shaft body, guide sleeves are respectively fixed at two ends of an inner hole of the main shaft body, a core rod is arranged in the inner hole of the guide sleeve, one end of the core rod extends out of the guide sleeve at one end, the outer surface of the extending end of the core rod is an outer conical surface, the taper angle A is 13-18 degrees, the inner surface of a center hole of the end head, connected with the main shaft body, of the cutter rod is an inner conical surface and is matched with the outer conical surface of the core rod, a spring is sleeved on the core rod, one end of the spring abuts against the guide sleeve at one end close to the outer conical surface, the other end of the spring abuts against a limiting sleeve, the limiting sleeve is fixedly sleeved on the core rod, a long bolt is arranged in the inner hole of the core rod, and the front end thread part of the long bolt is in threaded connection with the center hole of the cutter rod.

According to the spindle structure with the telescopic core rod, when the cutter bar is not installed, the core rod retreats to the original position under the thrust of the spring and the limiting sleeve, namely, one end of the outer conical surface is not exposed out of the installation flange surface at the end head of the spindle body, at the moment, a cutter can be directly installed at the approximate position of the installation flange surface of the spindle body along the radial direction, and an installation screw is not needed to be fastened temporarily. At the moment, the long bolt extends into the center threaded hole of the cutter bar to be screwed, the long bolt is screwed in to drive the core bar to extend forwards, the cutter bar is straightened through the outer conical surface at the front end of the core bar until the outer conical surface of the core bar is completely attached to the inner conical surface of the cutter bar, the long bolt cannot continue to advance, the centering (coaxiality) of the cutter bar and the main shaft body is realized, and then the flange face screw of the main shaft body is fastened. The same operation is performed reversely when the cutter bar is disassembled. The cutter bar quick-change tool has the advantages of being simple in structure, capable of quickly changing the cutter bar, improving working efficiency and reducing workpiece machining cost.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention.

Detailed Description

As shown in fig. 1: the utility model discloses a main shaft structure with a telescopic core rod, which comprises a box body 3, wherein a main shaft body 1 is arranged on the box body 3 through two groups of bearings 2, and a driving gear 12 connected with a transmission mechanism is fixed on the main shaft body 1. A bearing cover 11 is arranged on the outer side of the bearing 2, and a sealing element is arranged between the inner hole of the bearing cover 11 and the main shaft body 1. The end of the main shaft body 1 is provided with a mounting flange surface 10 connected with the cutter rod 4.

Guide sleeves 6 are respectively fixed at two ends of an inner hole of the main shaft body 1, a core rod 5 is arranged in the inner hole of each guide sleeve 6, and the core rod 5 can axially reciprocate. One end of the core rod 5 extends out from the guide sleeve 6 at one end, the outer surface of the extending end is an outer conical surface, the taper angle A is 13-18 degrees, and 15 degrees is the best. The inner surface of the center hole of the end of the cutter bar 4 connected with the main shaft body 1 is an inner conical surface and is matched with the outer conical surface of the core bar 5.

The core rod 5 is sleeved with a spring 8, one end of the spring 8 abuts against the guide sleeve 6 close to one end of the outer conical surface, the other end of the spring 8 abuts against a limiting sleeve 13, and the limiting sleeve 13 is fixedly sleeved on the core rod 5 through a jackscrew. The inner hole of the core rod 5 is provided with a long bolt 7, and the front end thread part of the long bolt 7 is in threaded connection with the central hole of the cutter bar 4.

When the cutter bar 4 is not installed, the core bar 5 retreats to the original position under the thrust of the spring 8 and the stop collar 13, namely, one end of the outer conical surface is not exposed out of the mounting flange surface 10 at the end of the main shaft body 1, at this time, the cutter 4 can be directly installed at the approximate position of the mounting flange surface 10 at the front end of the main shaft body 1 along the radial direction, and the mounting screw is not needed to be fastened temporarily. At the moment, the long bolt 7 extends into a central threaded hole of the cutter bar 4 to be screwed, the long bolt 7 is screwed in to drive the core bar 5 to extend forwards, the cutter bar 4 is aligned through the outer conical surface at the front end of the core bar 5 until the outer conical surface of the core bar 5 is completely attached to the inner conical surface of the cutter bar 4, the long bolt 7 cannot continue to advance, the centering (coaxiality) of the cutter bar 4 and the spindle body 1 is realized, and then the flange surface 10 screw of the spindle body 1 is fastened. The same operation is reversed when the cutter bar 4 is disassembled. The cutter bar quick-change tool has the advantages of being simple in structure, capable of quickly changing the cutter bar, improving working efficiency and reducing workpiece machining cost.

Claims

1. The utility model provides a main shaft structure with scalable core bar, includes box (3), installs main shaft body (1) through bearing (2) on box (3), and bearing cap (11) are installed in bearing (2) outside, have mounting flange face (10) that meet with cutter arbor (4) at the end of main shaft body (1), its characterized in that: guide sleeves (6) are respectively fixed at two ends of an inner hole of a main shaft body (1), a core rod (5) is arranged in the inner hole of each guide sleeve (6), one end of each core rod (5) extends out of the guide sleeve (6) at one end, the outer surface of the extending end is an outer conical surface, the taper angle A is 13-18 degrees, the inner surface of a center hole of an end head, connected with the main shaft body, of a cutter bar (4) is an inner conical surface and is matched with the outer conical surface of the core rod (5), a spring (8) is sleeved on each core rod (5), one end of the spring (8) abuts against the guide sleeve (6) close to one end of the outer conical surface, the other end of the spring abuts against a limiting sleeve (13), the limiting sleeve (13) is fixedly sleeved on the core rod (5), a long bolt (7) is arranged in the inner hole of the core rod (5), and the front end thread part of the long bolt (7) is in threaded connection with the center hole of the cutter bar (4).