CN113070498A

CN113070498A - End face driving ejector pin

Info

Publication number: CN113070498A
Application number: CN202110554539.1A
Authority: CN
Inventors: 唐钧; 蒋名峰
Original assignee: Shanghai Thinkhead M&e Co ltd
Current assignee: Shanghai Thinkhead M&e Co ltd
Priority date: 2021-05-21
Filing date: 2021-05-21
Publication date: 2021-07-06

Abstract

The invention discloses an end face driving thimble, which comprises a driving thimble seat, a thimble body, a driving floating device and a thimble positioning seat, wherein a thimble body placing cavity is arranged in the driving thimble seat, the front end of the driving thimble seat is provided with the thimble positioning seat, the rear end of the driving thimble seat is provided with a shank connecting plate, the thimble body, the driving floating device, a spring and a first jackscrew are sequentially arranged in the thimble body placing cavity from front to back, the top of the thimble body is arranged outside the thimble positioning seat, and a gasket is arranged between the thimble body and the spring. The center of the thimble can stretch out and draw back, and the driving blade can float, so that the problem of uneven end surface processing of a workpiece is solved, the driving force of each point end is uniform, the center has no lateral force, and the centering precision is improved.

Description

End face driving ejector pin

Technical Field

The invention belongs to the technical field of precision indexing machining applied to gear grinding and the like, and particularly relates to an end face driving ejector pin.

Background

The end face drive is a workpiece fixture which is arranged on a main shaft of a machine tool and is used by matching and clamping an end face drive tip and a tailstock. The end face driving centre mounted on the machine tool main shaft is used for transmitting the torque produced by main shaft rotation to the workpiece to be machined placed between two centre so as to drive shaft type part to make rotation. The end drive is used for full length one-time processing or avoiding processing interference.

Common end drives, which are divided into two main categories: the centre is axially telescopic, the driving blade is fixed, and the centre is fixed and the driving blade is telescopic. When the driving end face of the workpiece is not perpendicular to the center of the workpiece, only one or two driving points of the two end drivers contact the workpiece, so that a lateral force exists, the positioning is poor, and a machining error is caused. The end face and the central line have jumping inequality of 0.03-0.1, the fixed end drive four points are ensured not to be completely contacted with the end face of the workpiece, and if the force is increased to ensure that the end drive is contacted with the end face, the two tips deform, and the precision is influenced.

Disclosure of Invention

The present invention is directed to an end-face driving thimble, so as to solve the problems mentioned in the background art.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an end face drive thimble, includes drive thimble needle file 1, thimble body 2, drive floating installation 11 and thimble positioning seat 3 be equipped with the thimble body in the drive thimble needle file 1 and place the chamber thimble positioning seat 3 is equipped with to the front end of drive thimble needle file 1, and handle of a knife connection pad 4 is equipped with to the rear end thimble body is placed the intracavity and is equipped with thimble body 2, drive floating installation 11, spring 5 and first jackscrew 6 backward in the past in proper order, 3 outsides of thimble positioning seat are arranged in to the top of thimble body 2 be equipped with gasket 12 between thimble body 2 and the spring 5.

The invention is further improved in that: the driving floating device 11 comprises a built-in lever bracket 7, a built-in lever pin 8 and a built-in lever seat 9, wherein the built-in lever bracket 7 is installed on the built-in lever seat 9 through the built-in lever pin 8.

The invention is further improved in that: the thimble positioning seat 3 includes positioning seat body 31 and location mount pad 32 thimble installation through-hole 33 has been opened at the center of thimble positioning seat 3 the periphery of thimble installation through-hole 33 evenly opens has a plurality of end region pin mounting holes 34, at every all install end region pin 10 in the end region pin mounting hole 34 the location mount pad 32 is equipped with to the rear end of positioning seat body 31, the location mount pad 32 is fixed on drive thimble needle file 1.

The invention is further improved in that: four end region pin mounting holes 34 are uniformly formed on the periphery of the thimble mounting through hole 33.

The invention is further improved in that: the thimble body 2 is sleeved with a second jackscrew 13, one end of the second jackscrew 13 is arranged in four holes of the outer ring of the thimble positioning seat (3) and slides freely, and the other end of the second jackscrew props against the driving floating mechanism 11.

The invention has the technical effects and advantages that:

the driving floating device and the spring are arranged in the driving thimble seat, so that the centre of the thimble can stretch out and draw back, and the driving blade can float, thereby solving the problem of uneven end surface processing of a workpiece, ensuring uniform driving force of each point end, ensuring that the centre has no lateral force and improving the centering precision;

a plurality of end area pins are uniformly arranged on the outer periphery of the ejector pin, and the driving force is increased by uniformly contacting the end area pins with a workpiece, so that the inaccurate indexing caused by insufficient friction force is prevented;

the four pins are driven to float, so that four points can contact the workpiece, the four pins are arranged on one lever, the force of each point is consistent, and no lateral force exists; after the four driving pins are in contact with the end face of the workpiece and the force is balanced, the locking side faces push against the screws tightly, so that the four driving pins become fixing pins, and the force of acceleration and deceleration during indexing is resisted;

the tail end of the center tip is provided with a spring, the force is adjustable, and the contact force of the end driver can be adjusted by combining the force of the tailstock tip.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a front perspective view of the present invention;

FIG. 3 is a cross-sectional view of the present invention;

FIG. 4 is a schematic view of the internal structure of the present invention;

FIG. 5 is a schematic structural view of the thimble positioning seat;

fig. 6 is a schematic structural view of a built-in lever seat.

In the figure: the thimble structure comprises a driving thimble seat 1, a thimble body 2, a thimble positioning seat 3, a shank connecting plate 4, a spring 5, a first jackscrew 6, a built-in lever bracket 7, a built-in lever pin 8, a built-in lever seat 9, an end area pin 10, a driving floating mechanism 11, a gasket 12, a second jackscrew 13, a positioning seat body 31, a positioning installation seat 32, a thimble installation through hole 33 and an end area pin installation hole 34.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Fig. 1 to 6 show a specific embodiment of an end-face driving thimble: the thimble structure comprises a driving thimble seat 1, a thimble body 2, a driving floating device 11 and a thimble positioning seat 3, wherein a thimble body placing cavity is arranged in the driving thimble seat 1, the thimble positioning seat 3 is arranged at the front end of the driving thimble seat 1, a shank connecting plate 4 is arranged at the rear end of the driving thimble seat 1, the thimble body 2, the driving floating device 11, a spring 5 and a first jackscrew 6 are sequentially arranged in the thimble body placing cavity from front to back, the top of the thimble body 2 is arranged outside the thimble positioning seat 3, a second jackscrew 13 is sleeved on the thimble body 2, one end of the second jackscrew 13 is arranged in four holes in the outer ring of the top positioning seat 3 and slides freely, the other end of the second jackscrew props against the driving floating mechanism 11, and a gasket 12 is arranged between the thimble body 2 and the spring; the driving floating device 11 comprises a built-in lever bracket 7, a built-in lever pin 8 and a built-in lever seat 9 (shown in fig. 6), wherein the built-in lever bracket 7 is installed on the built-in lever seat 9 through the built-in lever pin 8 (shown in fig. 4); the thimble positioning seat 3 comprises a positioning seat body 31 and a positioning installation seat 32, a thimble installation through hole 33 is formed in the center of the thimble positioning seat 3, four end region pin installation holes 34 are uniformly formed in the periphery of the thimble installation through hole 33, an end region pin 10 is installed in each end region pin installation hole 34, the positioning installation seat 32 is installed at the rear end of the positioning seat body 31, and the positioning installation seat 32 is fixed on the driving thimble needle seat 1 (as shown in fig. 5).

By adopting the invention, any point with large driving force can move backwards in the using process, and other driving points can rise under the action of the cradle lever, thereby achieving the purpose of four-point force leveling and ensuring the precision of two apexes.

The applicant further states that the present invention is described in the above embodiments to explain the implementation method and device structure of the present invention, but the present invention is not limited to the above embodiments, i.e. it is not meant to imply that the present invention must rely on the above methods and structures to implement the present invention. It should be understood by those skilled in the art that any modifications to the present invention, the implementation of alternative equivalent substitutions and additions of steps, the selection of specific modes, etc., are within the scope and disclosure of the present invention.

The present invention is not limited to the above embodiments, and all the ways of achieving the objects of the present invention by using the structure and the method similar to the present invention are within the protection scope of the present invention.

Claims

1. An end face drive thimble which is characterized in that: including drive thimble seat (1), thimble body (2), drive floating installation (11) and thimble positioning seat (3) be equipped with the thimble body in drive thimble seat (1) and place the chamber thimble positioning seat (3) are equipped with to the front end of drive thimble seat (1), and handle of a knife connection pad (4) are equipped with to the rear end thimble body is placed the intracavity and is equipped with thimble body (2), drive floating installation (11), spring (5) and first jackscrew (6) backward in the past in proper order, thimble positioning seat (3) outside is arranged in to the top of thimble body (2) be equipped with gasket (12) between thimble body (2) and spring (5).

2. The end-face driven ejector pin of claim 1, wherein: the driving floating device (11) comprises a built-in lever support (7), a built-in lever pin (8) and a built-in lever seat (9), and the built-in lever support (7) is installed on the built-in lever seat (9) through the built-in lever pin (8).

3. The end-face driven ejector pin of claim 1, wherein: thimble positioning seat (3) are including positioning seat body (31) and location mount pad (32) open at the center of thimble positioning seat (3) has thimble installation through-hole (33) the periphery of thimble installation through-hole (33) is evenly opened has a plurality of end region pin mounting holes (34), every all install end region pin (10) in end region pin mounting hole (34) the rear end of positioning seat body (31) is equipped with location mount pad (32), location mount pad (32) are fixed on drive thimble needle file (1).

4. The end-face driven thimble of claim 3, wherein: four end area pin mounting holes (34) are uniformly formed in the periphery of the thimble mounting through hole (33).

5. The end-face driven ejector pin of claim 1, wherein: and a second jackscrew (13) is sleeved on the thimble body (2), one end of the second jackscrew (13) is arranged in four holes in the outer ring of the thimble positioning seat (3) and can freely slide, and the other end of the second jackscrew abuts against the driving floating mechanism (11).