Positioning mechanism for spline shaft in blind hole

Abstract

The utility model provides a blind hole internal spline shaft positioning mechanism which is characterized in that a positioning sleeve is mounted on a bottom plate, a positioning shaft is mounted at the center of the bottom of the positioning sleeve, a gap for placing a workpiece is formed between the positioning shaft and the positioning sleeve, and two studs are symmetrically mounted on the bottom plate and positioned on the outer side of the positioning sleeve; hook head pressing plates are oppositely installed at the upper ends of the two studs. According to the blind hole inner spline shaft positioning mechanism, workpiece shaft diameter and end face positioning and inner spline tooth coarse positioning are adopted to prevent machining rotation, and meanwhile pressing deformation of an outer thin-wall shaft diameter and clamping of a hook head pressing plate are avoided. Workpieces can be conveniently and rapidly replaced through rotation of the hook head pressing plate, the machining angle is accurate, precision is high, and efficiency is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of fixture, especially relates to the fixture for blind hole shaft production. BACKGROUND

[0002] The spline shaft is the key part of the automobile axle part. The blind hole spline shaft is the thin wall part of spline position, adopts the way of chuck clamping shaft diameter to clamp the workpiece during processing, and the positioning clamping workpiece is easy to deform during drilling, and the angle of hole and spline is not easy to guarantee. CONTENT

[0003] In order to solve the above problems existing in the way of traditional chuck clamping shaft diameter, the utility model provides a blind hole inner spline shaft positioning mechanism.

[0004] The utility model discloses a blind hole inner spline shaft positioning mechanism, installs positioning sleeve 6 on bottom plate 8, installs positioning shaft 9 at the bottom center of positioning sleeve 6, and the clearance between positioning sleeve 6 and positioning shaft 9 is used for placing workpiece 11, installs two double -end bolts 7 on the outside of positioning sleeve 6 on bottom plate 8, and the upper end of two double -end bolts 7 is opposite installation hook head pressing plate 1.

[0005] The support column 4 for supporting the hook head pressing plate 1 is installed on the outside of the double-end bolt 7 on the bottom plate 8.

[0006] The spring 3 is installed between the hook head pressing plate 1 and the thread bottom edge of the double-end bolt 7 on the double-end bolt 7, the washer 2 is installed between the hook head pressing plate 1 and the spring 3 on the double-end bolt 7, and the nut 12 is installed above the hook head pressing plate 1 on the double-end bolt 7.

[0007] The positioning sleeve 6 outer edge is installed on the bottom plate 8 through the positioning sleeve fixing screw 5, and the positioning shaft 9 and the inner edge of the positioning sleeve 6 are fixedly connected through the positioning shaft fixing screw 10.

[0008] The blind hole inner spline shaft positioning mechanism of the utility model adopts workpiece shaft diameter and end face positioning, inner spline tooth rough positioning prevents processing rotation, also avoids that the outer thin wall shaft diameter is compressed and deformed, and the hook head pressing plate clamps. The hook head pressing plate is rotated to replace the workpiece, and the angle is accurate, the precision is high, and the efficiency is high. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 It is the main view cross section drawing of the blind hole inner spline shaft positioning mechanism of the utility model.

[0010] In the drawing: 1, hook head pressing plate, 2, washer, 3, spring, 4, support column, 5, positioning sleeve fixing screw, 6, positioning sleeve, 7, double-end bolt, 8, bottom plate, 9, positioning shaft, 10, positioning shaft fixing screw, 11, workpiece, 12, nut. DETAILED DESCRIPTION

[0011] The blind hole inner spline shaft positioning mechanism of the utility model is shown as Figure 1 The positioning sleeve 6 is installed on the bottom plate 8 through the positioning sleeve fixing screw 5, and the positioning shaft 9 is fixedly connected with the inner edge of the positioning sleeve 6 through the positioning shaft fixing screw 10. The gap between the positioning shaft 9 and the positioning sleeve 6 is used for placing the workpiece 11. Two stud bolts 7 are symmetrically installed on the outer side of the positioning sleeve 6 on the bottom plate 8. The spring 3 is installed on the stud bolt 7 between the hook head pressing plate 1 and the threaded bottom edge of the stud bolt 7. The washer 2 is installed on the stud bolt 7 between the hook head pressing plate 1 and the spring 3. The nut 12 is installed on the stud bolt 7 above the hook head pressing plate 1. The hook head pressing plate 1 is oppositely installed on the upper ends of the two stud bolts 7. The support column 4 for supporting the hook head pressing plate 1 is installed on the outer side of the stud bolt 7 on the bottom plate 8.

[0012] The positioning shaft 9 is installed on the inner edge of the positioning sleeve 6 through the positioning shaft fixing screw 10, so that the spline shaft diameter is coarsely positioned, the angle of the machined hole is ensured to be consistent, and the movement is prevented. Then, the positioning sleeve fixing screw 5 is assembled on the bottom plate 8. The stud bolt 7 is fixed on the bottom plate 8 through the screw fastening mode at the lower end and fixed on the hook head pressing plate 1 through the washer 2, the spring 3 and the nut 12 at the upper end. The workpiece upper end surface is pressed by the hook head pressing plate 1. After assembly, the mechanism is installed on the drilling machine.

[0013] During work, the workpiece 11 (spline blind hole shaft) is installed, the workpiece 11 is positioned by the shaft diameter and the end surface, the inner spline is coarsely positioned, the shaft end part of the workpiece 11 is pressed by the hook head pressing plate 1, the machine tool is started to drill the shaft shoulder hole, the workpiece is machined, then the hook head pressing plate 1 is loosened, the workpiece 11 is removed, and another workpiece is installed and pressed, and then the next workpiece is machined.

Claims

1. A blind-bore internal spline shaft positioning mechanism characterized by: The bottom plate (8) is provided with a positioning sleeve (6), and the bottom center of the positioning sleeve (6) is provided with a positioning shaft (9). A gap is formed between the positioning shaft (9) and the positioning sleeve (6) for placing a workpiece (11). Two double-headed bolts (7) are symmetrically arranged on the bottom plate (8) outside the positioning sleeve (6). The upper ends of the two double-headed bolts (7) are oppositely provided with a hook-shaped pressing plate (1).

2. The blind bore internal spline shaft positioning mechanism of claim 1, wherein: The bottom plate (8) is provided with a support column (4) outside the double-headed bolt (7) for supporting the hook-shaped pressing plate (1).

3. The blind-bore-internal-mic hel shaft positioning mechanism of claim 1, wherein: The double-headed bolt (7) is provided with a spring (3) between the hook-shaped pressing plate (1) and the threaded bottom edge of the double-headed bolt (7). The double-headed bolt (7) is provided with a washer (2) between the hook-shaped pressing plate (1) and the spring (3). The double-headed bolt (7) is provided with a nut (12) above the hook-shaped pressing plate (1).

4. The blind-bore-internal-mic hel shaft positioning mechanism of claim 1, wherein: The outer edge of the positioning sleeve (6) is fixed to the bottom plate (8) by a positioning sleeve fixing screw (5). The positioning shaft (9) and the inner edge of the positioning sleeve (6) are fixedly connected by a positioning shaft fixing screw (10).

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