CN214978255U

CN214978255U - Gear machining expansion sleeve clamping tool

Info

Publication number: CN214978255U
Application number: CN202121472142.XU
Authority: CN
Inventors: 晋嘉; 李昭; 陈华峰
Original assignee: Sichuan Province Neijiang Qinglong Machine Tool Co ltd
Current assignee: Sichuan Province Neijiang Qinglong Machine Tool Co ltd
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2021-12-03
Anticipated expiration: 2031-06-30

Abstract

The utility model discloses a gear processing expansion sleeve clamping tool, which comprises a base, a connecting seat connected with the base, a mandrel and a backing ring which are fixedly arranged on the connecting seat, and an upper taper sleeve, wherein the backing ring is positioned at the periphery of the mandrel; the upper end of the mandrel is fixedly provided with a stud, a compression nut is connected to the stud, the upper end of the mandrel is provided with a section of external conical surface, an elastic expansion sleeve is sleeved outside the upper end of the mandrel and provided with an internal conical surface matched with the external conical surface, and the upper end of the elastic expansion sleeve is connected with the compression nut; a gland is arranged outside the lower section of the upper taper sleeve through an upper bearing and a lower bearing, and an end cover positioned below the lower bearing is fixedly connected with the upper taper sleeve; the utility model discloses not only the clamping is convenient, the good reliability, and centering precision is high, has improved production efficiency and processingquality.

Description

Gear machining expansion sleeve clamping tool

Technical Field

The utility model relates to a tight frock of cover clamp that expands for gear machining, especially the tight frock of cover clamp that expands that is used for gear hobbing processing.

Background

At present, tools used for gear hobbing are mostly adopted to compress the end faces of workpieces, so that clamping is inconvenient, reliability is poor, centering precision cannot be guaranteed, and production efficiency and machining quality are affected.

Disclosure of Invention

The utility model aims at the above-mentioned not enough of prior art, provide a gear machining expands that the cover presss from both sides tight frock, it is not only that the clamping is convenient, the good reliability, and centering precision is high, has improved production efficiency and processingquality.

In order to achieve the purpose, the gear machining expansion sleeve clamping tool comprises a base, a connecting seat connected with the base, a mandrel and a backing ring which are fixedly arranged on the connecting seat, and an upper taper sleeve, wherein the backing ring is positioned on the periphery of the mandrel; the method is characterized in that: the upper end of the mandrel is fixedly provided with a stud, a compression nut is connected to the stud, the upper end of the mandrel is provided with a section of external conical surface, an elastic expansion sleeve is sleeved outside the upper end of the mandrel and provided with an internal conical surface matched with the external conical surface, and the upper end of the elastic expansion sleeve is connected with the compression nut; the lower section of the upper taper sleeve is externally provided with a gland through an upper bearing and a lower bearing, and the upper taper sleeve is fixedly connected with an end cover positioned below the lower bearing.

When the device is used, a workpiece is placed on the backing ring, the compression nut is rotated to downwards extrude the elastic expansion sleeve, the elastic expansion sleeve outwards expands under the action of the outer conical surface to expand the workpiece, the upper conical sleeve is pushed down by an upper pressure head of a machine tool, and the gland presses the end surface of the workpiece to prevent vibration; the utility model has the advantages of convenient clamping, automatic centering by the compression and expansion of the elastic expansion sleeve, high centering precision, double positioning, good reliability and capability of improving the production efficiency and the processing quality;

as a preferred choice of the utility model, the lower end of the compression nut is fixedly connected with a retaining ring, the retaining ring is fixedly provided with an outer convex ring, the middle part of the compression nut is fixedly provided with a shaft shoulder, the compression nut below the shaft shoulder is externally sleeved with a gasket, the upper end of the elastic expansion sleeve is fixedly connected with an inner convex ring, and the inner convex ring is clamped between the gasket and the outer convex ring in the axial direction; the elastic expansion sleeve can move up and down along with the compression nut and is convenient to assemble, disassemble and replace;

as a preferred choice of the utility model, a taper hole is arranged in the connecting seat, and a core cone matched with the taper hole is fixedly connected with the lower end of the core shaft; the automatic centering of the mandrel on the connecting seat can be realized;

as a preferred choice of the utility model, the upper bearing and the lower bearing are thrust bearings, the upper bearing is externally provided with a fixed sleeve fixedly connected with the upper taper sleeve, and the gland and the upper taper sleeve are provided with a plurality of balls between the radial direction; the accurate positioning of the gland in the radial direction can be ensured;

to sum up, the utility model discloses not only the clamping is convenient, the good reliability, and centering precision is high, has improved production efficiency and processingquality.

Drawings

Fig. 1 is a front view of an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to examples.

As shown in fig. 1, the gear processing expansion sleeve clamping tool of the embodiment includes a base 1, a connecting seat 2 connected with the base 1 through a bolt, a mandrel 3 and a backing ring 4 fixed on the connecting seat 2 through a bolt, and an upper taper sleeve 10; a taper hole is formed in the connecting seat 2, a core cone 3a matched with the taper hole is integrally and fixedly connected with the lower end of the mandrel 3, and the backing ring 4 is positioned on the periphery of the mandrel 3; the upper end of the mandrel 3 is fixedly provided with a stud 5, the stud 5 is connected with a compression nut 6 through threads, the lower end of the compression nut 6 is fixedly connected with a retainer ring 7 through a screw, the retainer ring 7 is fixedly provided with an outer convex ring, the middle part of the compression nut 6 is fixedly provided with a shaft shoulder 6a, the compression nut 6 below the shaft shoulder 6a is sleeved with a gasket 8, the upper end of an elastic expansion sleeve 9 is integrally and fixedly connected with an inner convex ring 9a, the inner convex ring 9a is axially clamped between the gasket 8 and the outer convex ring, the upper end of the mandrel 3 is provided with a section of outer conical surface 3b, the elastic expansion sleeve 9 is sleeved outside the upper end of the mandrel, and the elastic expansion sleeve 9 is provided with an inner conical surface matched with the outer conical surface 3 b; the lower section of the upper taper sleeve 10 is externally provided with a gland 13 through an upper bearing 11 and a lower bearing 12, the upper bearing 11 and the lower bearing 12 are thrust bearings, the upper bearing 11 is externally provided with a fixed sleeve 14 fixedly connected with the upper taper sleeve 10, the gland 13 and the upper taper sleeve 10 are provided with a plurality of balls 15 between the radial direction, and the upper taper sleeve 10 is fixedly connected with an end cover 16 positioned below the lower bearing 12.

When the device is used, the upper taper sleeve 10 is connected with an upper pressure head of a machine tool, a workpiece 17 is arranged on the backing ring 4, the compression nut 6 is rotated through a wrench and the like, the elastic expansion sleeve 9 is extruded downwards, the elastic expansion sleeve expands outwards under the action of the outer conical surface 3b, the workpiece 17 is expanded, the upper taper sleeve is pushed down by the upper pressure head, the gland 13 compresses the end surface of the workpiece 17, and vibration is prevented when the workpiece is processed; the utility model has the advantages of convenient clamping, automatic centering by the compression and expansion of the elastic expansion sleeve 9, high centering precision, good reliability by the expansion and compression double positioning, and improved production efficiency and processing quality; the elastic expansion sleeve 9 is connected with the compression nut 6 through the retainer ring 7 and the washer 8, the elastic expansion sleeve 9 can move up and down along with the compression nut 6, and the assembly, disassembly and replacement are convenient; the core cone 3a can realize the automatic centering of the core shaft 3 on the connecting seat 2; the upper bearing 11, the lower bearing 12 and the plurality of balls 15 can ensure the flexibility of the rotation of the upper taper sleeve 10 and the accurate positioning of the gland 13 in the radial direction.

Claims

1. A gear machining expansion sleeve clamping tool comprises a base, a connecting seat connected with the base, a mandrel and a backing ring which are fixedly arranged on the connecting seat, and an upper taper sleeve, wherein the backing ring is positioned on the periphery of the mandrel; the method is characterized in that: the upper end of the mandrel is fixedly provided with a stud, a compression nut is connected to the stud, the upper end of the mandrel is provided with a section of external conical surface, an elastic expansion sleeve is sleeved outside the upper end of the mandrel and provided with an internal conical surface matched with the external conical surface, and the upper end of the elastic expansion sleeve is connected with the compression nut; the lower section of the upper taper sleeve is externally provided with a gland through an upper bearing and a lower bearing, and the upper taper sleeve is fixedly connected with an end cover positioned below the lower bearing.

2. The gear machining expanding sleeve clamping tool according to claim 1, characterized in that: the lower end of the compression nut is fixedly connected with a retaining ring, the retaining ring is fixedly provided with an outer convex ring, the middle part of the compression nut is fixedly provided with a shaft shoulder, the compression nut below the shaft shoulder is sleeved with a gasket, the upper end of the elastic expansion sleeve is fixedly connected with an inner convex ring, and the inner convex ring is clamped between the gasket and the outer convex ring in the axial direction.

3. The gear machining expanding sleeve clamping tool according to claim 1 or 2, characterized in that: a taper hole is arranged in the connecting seat, and a core cone matched with the taper hole is fixedly connected with the lower end of the core shaft.

4. The gear machining expanding sleeve clamping tool according to claim 3, characterized in that: the upper bearing and the lower bearing are both thrust bearings, a fixed sleeve fixedly connected with the upper taper sleeve is arranged outside the upper bearing, and a plurality of balls are arranged between the gland and the upper taper sleeve in the radial direction.