Adjustable key pulling tool

Abstract

The utility model particularly relates to an adjustable key pulling tool which comprises a mandrel body used for installing a part, one end of the mandrel body is installed on a lathe, a key pulling groove is formed in the outer portion of the mandrel body in the axial direction of the mandrel body, a fixing device used for fixing the part is arranged at the other end of the mandrel body, and the fixing device comprises an eccentric shaft. The eccentric shaft is horizontally installed in the axial direction of the mandrel body, the outer end of the eccentric shaft is sleeved with an inner sleeve, the inner sleeve is sleeved with a jacking sleeve, a through hole matched with the inner sleeve in shape is formed in the jacking sleeve, and the jacking sleeve moves up and down along with rotation of the eccentric shaft. And the eccentric shaft is rotated, so that the jacking sleeve fixes the part, and mounting and dismounting are convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to disc type part's flat key broaching tool field, concretely relates to an adjustable pull key tool. BACKGROUND

[0002] For the disc type part's flat key broaching of the larger aperture (more than phi 100), the part weight needs the help of the tool fixed on the lathe, thereby carrying out the flat key broaching, and the present tool installation and dismounting are more cumbersome. SUMMARY

[0003] In view of the prior art's insufficient, the utility model provides an adjustable pull key tool.

[0004] The utility model discloses a technical scheme is like this: an adjustable pull key tool, including the core shaft body for installing part, the one end of core shaft body is installed on lathe, the outside of core shaft body is seted up along its axial direction pull key groove, the other end of core shaft body is provided with the fixed device that carries out the fixation of part, and the fixed device includes eccentric shaft, and the eccentric shaft is horizontally installed in the axial direction of core shaft body, and the outer end portion of eccentric shaft is equipped with the inner cover, and the outside of inner cover is equipped with the tight cover, and the through -hole that is seted up with the shape cooperation of inner cover is seted up on the tight cover, and the tight cover follows eccentric shaft's rotation and moves up and down.

[0005] The outer end portion of eccentric shaft extends to the outside of core shaft body, and the outer end portion of eccentric shaft is hexagonal structure.

[0006] The top and bottom of inner cover are horizontal structure, and the left side and right side of inner cover are arc structure.

[0007] The through -hole of tight cover has the clearance with the left and right direction of inner cover.

[0008] The end of core shaft body is seted up with the placement groove of installing tight cover, and the placement groove is matched with tight cover, and the cross section of tight cover is T type structure, and the placement groove extends to the outside of core shaft body.

[0009] The both sides of tight cover are installed with the pressing block, and the pressing block is fixed on the placement groove through bolt.

[0010] The outside of core shaft body is equipped with the positioning sleeve.

[0011] The arc structure of the end face of inner cover close to core shaft body is fixedly connected with the positioning plate on both sides.

[0012] The end face of tight cover close to positioning plate is seted up with the positioning groove for placing positioning plate.

[0013] The utility model discloses a technical scheme has following positive effect: the utility model discloses a kind of auxiliary tool for broaching flat key in disc parts, disc part is sleeved in the outside of mandrel body, the position needing to process flat key is corresponding with the position of pull key groove, and flat key is processed by lathe broaching;By the six-sided structure of tool rotation eccentric shaft, top tight cover moves in circumference, so that disc part is fixed, when removing, eccentric shaft is rotated again, and it is convenient to install and disassemble;Inner sleeve limits top tight cover, so that top tight cover can only move up and down, and cannot move left and right. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is structure schematic view of the utility model.

[0015] Figure 2 It is structure schematic view of the utility model.

[0016] Figure 3 It is structure schematic view of inner sleeve and top tight cover.

[0017] Figure 4 It is structure schematic view of inner sleeve.

[0018] Figure 5 It is structure schematic view of top tight cover. DETAILED DESCRIPTION

[0019] As Figures 1-5 Shown, a kind of adjustable pull key tool, including the mandrel body 1 for installing part, one end of mandrel body 1 is installed on lathe, and mandrel body 1 is opened with pull key groove 2 along its axial direction outside, and the other end of mandrel body 1 is provided with the fixing device for fixing part, and the fixing device includes eccentric shaft 3, eccentric shaft 3 is horizontally installed in the axial direction of mandrel body 1, eccentric shaft 3 is sleeved with inner sleeve 4 on outer end portion, inner sleeve 4 is sleeved with top tight cover 5 outside, top tight cover 5 is opened with through hole 6 on it, and the shape of through hole 6 is matched with inner sleeve 4, and top tight cover 5 moves up and down following the rotation of eccentric shaft 3;Specifically, disc part is sleeved in the outside of mandrel body 1, the position needing to broach flat key is corresponding with the position of pull key groove 2, after being installed on mandrel body 1, eccentric shaft 3 is rotated, and top tight cover 5 is moved up and down, so that disc part is fixed on mandrel body 1.

[0020] The outer end portion of eccentric shaft 3 extends to the outside of mandrel body 1, and the outer end portion of eccentric shaft 3 is six-sided structure;Specifically, as Figure 2 Shown, the right end portion of eccentric shaft 3 is six-sided structure, and it is convenient to use spanner to operate.

[0021] The top and bottom of the inner sleeve 4 are horizontally structured, and the left and right sides of the inner sleeve 4 are arc-shaped structured; the through hole 6 of the top sleeve 5 has a gap in the left-right direction with the inner sleeve 4; specifically, when the eccentric shaft 3 rotates, there is no gap between the up-down positions of the inner sleeve 4 and the through hole 6 of the top sleeve 5, which will drive the top sleeve to move up and down.

[0022] The end of the shaft body 1 is provided with a placing groove 8 for installing the top sleeve 5, and the placing groove 8 cooperates with the top sleeve 5; the cross section of the top sleeve 5 is T-shaped structured, and the placing groove 8 extends to the outside of the core shaft body 1; specifically, as shown in the figure, the placing groove 8 is ladder-shaped, and the placing groove 8 extends to the outside of the core shaft body 1, so that the top sleeve 5 can be moved downward to the outside of the core shaft body 1, thereby fixing the disc parts.

[0023] The two sides of the top sleeve 5 are provided with pressing blocks 9, and the pressing blocks 9 are fixed on the placing groove 8 by bolts; the pressing blocks 9 limit the axial direction of the top sleeve 5.

[0024] The outside of the core shaft body 1 is provided with a positioning sleeve 10; the positioning sleeve 10 is used for installation and positioning with the lathe.

[0025] The two sides of the arc-shaped structure of the end face of the inner sleeve 4 close to the core shaft body 1 are fixedly connected with positioning plates 11; the end face of the top sleeve 5 close to the positioning plates 11 is provided with positioning grooves 12 for placing the positioning plates 11; specifically, the positioning plates 11 limit the axial direction of the inner sleeve 4.

Claims

1. An adjustable draw key tool comprising a mandrel body for mounting a part, one end of the mandrel body being mounted on a lathe, characterised in that: The outer part of the mandrel body is provided with a pull key groove along its axial direction, and the other end of the mandrel body is provided with a fixing device for fixing the part, which comprises an eccentric shaft horizontally installed on the axial direction of the mandrel body, an inner sleeve sleeved on the outer end of the eccentric shaft, and a tight sleeve provided with a through hole matched with the shape of the inner sleeve and moving up and down following the rotation of the eccentric shaft.

2. The adjustable keying tool of claim 1, wherein: The outer end of the eccentric shaft extends to the outer part of the mandrel body, and the outer end of the eccentric shaft is a hexagonal structure.

3. The adjustable keying tool of claim 1, wherein: The top and bottom of the inner sleeve are horizontal structures, and the left and right sides of the inner sleeve are arc structures.

4. The adjustable keying tool of claim 3, wherein: The through hole of the tight sleeve has a gap with the left and right directions of the inner sleeve.

5. An adjustable keying tool according to claim 4, wherein: The end of the mandrel body is provided with a placing groove for installing the tight sleeve, and the placing groove is matched with the tight sleeve, the cross section of the tight sleeve is a T-shaped structure, and the placing groove extends to the outer part of the mandrel body.

6. An adjustable keying tool according to claim 5, wherein: The tight sleeve is provided with a pressing block on both sides, and the pressing block is fixed on the placing groove by bolts.

7. The adjustable keying tool of claim 1, wherein: The outer part of the mandrel body is sleeved with a positioning sleeve.

8. The adjustable keying tool of claim 3, wherein: The arc structure of the end face of the inner sleeve close to the mandrel body is fixedly connected with a positioning plate on both sides.

9. An adjustable keying tool according to claim 8, wherein: The end face of the tight sleeve close to the positioning plate is provided with a positioning groove for placing the positioning plate.

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