CN212682545U

CN212682545U - Star wheel end plane indexing milling fixture

Info

Publication number: CN212682545U
Application number: CN202021015385.6U
Authority: CN
Inventors: 陈建超; 张恺; 程浩雨; 徐裕盛; 程康; 郝欣晴
Original assignee: Yanshan University
Current assignee: Yanshan University
Priority date: 2020-06-05
Filing date: 2020-06-05
Publication date: 2021-03-12
Anticipated expiration: 2030-06-05

Abstract

The utility model discloses a star wheel end plane indexing milling fixture, wherein the positioning part comprises a base, a V-shaped block, a spring washer I, a bolt I, an expansion mandrel, a flange sliding bearing, a supporting seat, an Oldham coupling, a screw and a cylindrical pin; the pressing part comprises a pressing block, a bolt IV, a cylinder hinged base, a spring retainer ring for a shaft, a pin, a cylinder connecting piece, a swing rod, an internal thread cylindrical pin and a manual welding stud; the indexing part comprises a bolt II, a spring washer II, a connecting shaft, a pneumatic indexing disc and a bolt III. This special fixture utilizes the cylinder to make inflation dabber, V-arrangement piece and compact heap carry out the location of star gear part and press from both sides tightly, guarantees positioning accuracy. The utility model discloses simple structure, it is high-efficient convenient, degree of automation is high, and the practicality is strong, and the precision is high, can solve the difficult problem of processing in the three end plane of star gear.

Description

Star wheel end plane indexing milling fixture

Technical Field

The utility model relates to a field of star gear part anchor clamps, especially a star gear end plane graduation milling fixture.

Background

The star wheel part is mainly applied to an overrunning clutch, and the overrunning clutch is a device with a self-clutch function for changing the speed or the rotating direction of a driving part and a driven part and can obtain required speed and torque. The star wheel with smaller aperture generally selects hot rolling or cold drawing bar stock, and can also adopt solid casting; when the aperture is larger, seamless steel pipes or castings and forgings with holes are often adopted. The star wheel as a transmission part has the end plane roughness requirement of 0.8 mu m, the plane distance from the axis has high precision requirement, the star wheel is uniformly distributed at 120 degrees, three surfaces are required to be processed under one-time clamping, and a set of automatic special fixture can be designed for specific procedures during batch production to ensure precision and reduce processing time, so that the efficiency is improved, and the cost is reduced. At present, the indexing milling clamp for the star wheel end plane has the advantages of less types, low processing automation degree, difficulty in ensuring precision and long processing period.

A star wheel end plane index milling fixture is an alternative approach.

SUMMERY OF THE UTILITY MODEL

To the problem, an object of the utility model is to provide a star gear end plane graduation milling fixture that high-efficient convenient, degree of automation is high, the precision is high, be applicable to assembly line operation, it includes the location portion, compresses tightly part and graduation part.

The positioning parts are distributed at the front left part and the middle part of the special clamp, the pressing parts are distributed at the left part of the special clamp, and the indexing parts are distributed at the right part of the special clamp.

The positioning part comprises a base, a V-shaped block, a spring washer I, a bolt I, an expansion mandrel, a flange sliding bearing, a supporting seat, a cross sliding block coupler, a screw and a cylindrical pin, the V-shaped block of the positioning part is connected with the base through the bolt I, the spring washer I and the cylindrical pin, and the V-shaped block is in contact with the outer circular surface of the star wheel; the axial positioning of star gear is through the cover at inflation dabber left end, and flange slide bearing provides the support for the inflation dabber through screw and supporting seat fixed connection, and the inflation dabber right-hand member is connected with the crosshead shoe shaft coupling left end.

The pressing part comprises a pressing block, a bolt IV, a cylinder hinge base, a shaft spring retainer ring, a pin, a cylinder connecting piece, a swing rod, an internal thread cylindrical pin and a manual welding stud; the upper end of the cylinder is connected with a cylinder connecting piece, the cylinder connecting piece is connected with the front end of the oscillating bar through a pin, and the shaft is sleeved on the pin by spring retainer rings and distributed on two sides of the cylinder connecting piece; the middle of the swing rod is connected with a cylinder connecting piece through a pin, and the cylinder connecting piece is connected with the supporting seat through a manual welding stud; the rear end of the swing rod is in interference connection with the pressing block through an internal thread cylindrical pin.

The indexing part comprises a bolt II, a spring washer II, a connecting shaft, a pneumatic indexing disc and a bolt III, the connecting shaft of the indexing part is fixed with the pneumatic indexing disc through the bolt II and the spring washer II, and the pneumatic indexing disc is fixedly connected with the base through the bolt III.

Compared with the prior art, the utility model have following advantage:

simple structure, it is high-efficient convenient, degree of automation is high, and the practicality is strong, and the precision is high, can solve the difficult problem of processing in the three end plane of star gear.

Drawings

Fig. 1 is a front view of the star wheel end plane indexing milling fixture of the present invention.

Fig. 2 is a left side view of the star wheel end plane indexing milling fixture of the present invention.

Fig. 3 is a top view of the star wheel end plane indexing milling fixture of the present invention.

Fig. 4 is a cross-sectional view a-a of the star wheel end plane indexing milling fixture of the present invention.

Fig. 5 is a B-B cross-sectional view of the star wheel end plane indexing milling fixture of the present invention.

Fig. 6 is a C-C sectional view of the star wheel end plane indexing milling fixture of the present invention.

Fig. 7 is a front view of the star wheel component of the present invention.

Figure 8 is a cross-sectional view of a spider feature of the present invention.

The reference numbers: 1. the device comprises a base, 2, a V-shaped block, 3, spring washers I, 4, bolts I, 5, an expansion mandrel, 6, a pressing block, 7, a flange sliding bearing, 8, a supporting seat, 9, a cross slide block coupler, 10, bolts II, 11, spring washers II, 12, a connecting shaft, 13, a pneumatic dividing disc, 14, bolts III, 15, screws, 16, bolts IV, 17, a cylinder hinged base, 18, a shaft spring retainer ring, 19, pins, 20, a cylinder, 21, a cylinder connecting piece, 22, a swing rod, 23, an internal thread cylindrical pin, 24, a cylindrical pin, 25 and a manual welding stud.

Detailed Description

The present invention will be further described with reference to specific examples, which are illustrative of the invention and are not to be construed as limiting the invention.

Example (b): a star wheel end plane indexing milling fixture as shown in figures 1-6. The positioning part is distributed on the left front part and the middle part of the clamp, the pressing part is distributed on the left part of the clamp, and the indexing part is distributed on the right part of the clamp. The V-shaped block 2 of the positioning part is connected with the base 1 through a bolt I4, a spring washer I3 and a cylindrical pin 24, and the V-shaped block 2 is in contact with the outer circular surface of the star wheel part; the axial positioning of star wheel part is through the cover at 5 left ends on the inflation dabber, and flange slide bearing 7 provides the support for inflation dabber 5 through

screw

15 and 8 fixed connection on the supporting seat, and 5 right-hand members on the inflation dabber are connected with the 9 left ends on the crosshead shoe shaft coupling. The lower end of a cylinder 20 of the pressing part is connected with a cylinder hinged base 17 through a pin 19, a shaft spring retainer ring 18 is sleeved on the pin 19 and distributed on two sides of the cylinder hinged base 17, and the cylinder hinged base 17 is fixed on the base 1 through a bolt IV 16; the upper end of the cylinder 20 is connected with a cylinder connecting piece 21, the cylinder connecting piece 21 is connected with the front end of the oscillating bar 22 through a pin 19, and the shaft is sleeved on the pin 19 by spring retainer rings 18 and distributed on two sides of the cylinder connecting piece 21; the middle of the swing rod 22 is connected with an air cylinder connecting piece 21 through a pin 19, and the air cylinder connecting piece 21 is connected with the supporting seat 8 through a manual welding stud 25; the rear end of the swing rod 22 is in interference connection with the pressing block 6 through an internal thread cylindrical pin 23. The connecting shaft 12 of the indexing part is fixed with the pneumatic indexing disc 13 through a bolt II10 and a spring washer II11, and the pneumatic indexing disc 13 is fixedly connected with the base 1 through a bolt III 14.

As shown in fig. 7 and 8, the cross-sectional view of the star wheel part is that three end planes which are 120 degrees from each other are machined surfaces of the embodiment.

In the embodiment, the expansion mandrel 5 is matched with the central hole of the star wheel to realize four-degree-of-freedom positioning, and the V-shaped block 2 realizes two-degree-of-freedom positioning. To achieve the accuracy and indexing requirements, the indexing is done using a pneumatic indexing disk 13.

The star wheel part adopts centering clamping mechanism, selects star wheel centre bore up end to be the clamping surface, and lower terminal surface and downthehole surface are the clamping surface, and it is tight to utilize cylinder 20 to make inflation dabber 5, V-arrangement piece 2 and compact heap 6 carry out the location of star wheel part and press from both sides, guarantees positioning accuracy, and simple easy operation shortens design cycle, reduce cost.

The working principle is as follows:

as shown in fig. 1 to 6, when the assembly line work is performed, a workpiece is firstly installed on an expansion mandrel 5 through a star wheel center hole, an air cylinder 20 is inflated to expand the expansion mandrel 5, the workpiece is compressed by a compression block 6 and positioned and clamped by a V-shaped block 2, the milling machine starts to work to mill a first plane, after the first plane is milled, the air cylinder 20 is deflated to enable the workpiece to rotate, the workpiece is rotated by 120 degrees by a pneumatic dividing disc 13, the workpiece is positioned and clamped by the same steps again, a second plane is milled, and a third plane is milled by the same steps, so that the workpiece is milled completely. When the workpiece is disassembled, the air cylinder 20 is used for deflating to release the pressing block 6 and the expansion mandrel 5, and the workpiece can be disassembled from the expansion mandrel 5 to finish the processing and manufacturing of the working procedure.

Claims

1. The utility model provides a star gear end plane graduation milling fixture, includes location portion, compresses tightly part and indexing means, its characterized in that: the positioning parts are distributed at the front left part and the middle part of the star wheel end plane indexing milling fixture, the indexing parts are distributed at the right part of the star wheel end plane indexing milling fixture, and the pressing parts are distributed at the left part of the star wheel end plane indexing milling fixture;

the positioning part comprises a base (1), a V-shaped block (2), a spring washer I (3), a bolt I (4), an expansion mandrel (5), a flange sliding bearing (7), a supporting seat (8), an Oldham coupling (9), a screw (15) and a cylindrical pin (24), the V-shaped block (2) of the positioning part is connected with the base (1) through the bolt I (4), the spring washer I (3) and the cylindrical pin (24), and the V-shaped block (2) is in contact with the outer circular surface of the star wheel; the axial positioning of the star wheel is sleeved at the left end of the expansion mandrel (5), the flange sliding bearing (7) is fixedly connected with the supporting seat (8) through a screw (15) to provide support for the expansion mandrel (5), and the right end of the expansion mandrel (5) is connected with the left end of the crosshead shoe coupling (9);

the pressing part comprises a pressing block (6), a bolt IV (16), a cylinder hinged base (17), a spring retainer ring (18) for a shaft, a pin (19), a cylinder (20), a cylinder connecting piece (21), a swing rod (22), an internal thread cylindrical pin (23) and a manual welding stud (25), the lower end of the cylinder (20) of the pressing part is connected with the cylinder hinged base (17) through the pin (19), the spring retainer ring (18) for the shaft is sleeved on the pin (19) and distributed on two sides of the cylinder hinged base (17), and the cylinder hinged base (17) is fixed on the base (1) through the bolt IV (16); the upper end of the cylinder (20) is connected with a cylinder connecting piece (21), the cylinder connecting piece (21) is connected with the front end of the swing rod (22) through a pin (19), and a spring retainer ring (18) for a shaft is sleeved on the pin (19) and distributed on two sides of the cylinder connecting piece (21); the middle of the swing rod (22) is connected with an air cylinder connecting piece (21) through a pin (19), and the air cylinder connecting piece (21) is connected with the supporting seat (8) through a manual welding stud (25); the rear end of the swing rod (22) is in interference connection with the pressing block (6) through an internal thread cylindrical pin (23);

the indexing part comprises a bolt II (10), a spring washer II (11), a connecting shaft (12), a pneumatic indexing disc (13) and a bolt III (14), the connecting shaft (12) of the indexing part is fixed with the pneumatic indexing disc (13) through the bolt II (10) and the spring washer II (11), and the pneumatic indexing disc (13) is fixedly connected with the base (1) through the bolt III (14).