CN113275908B

CN113275908B - Zero clearance locking device of lathe C axle

Info

Publication number: CN113275908B
Application number: CN202110504725.4A
Authority: CN
Inventors: 朱铁强; 鲁娜; 武立坡; 贾延朋; 曹振松; 董祥兵
Original assignee: Dezhou Delong Group Machine Tool Co ltd
Current assignee: SHANDONG PRECION GROUP CO Ltd
Priority date: 2021-05-10
Filing date: 2021-05-10
Publication date: 2022-09-13
Anticipated expiration: 2041-05-10
Also published as: CN113275908A

Abstract

The invention discloses a zero-clearance locking device for a C shaft of a lathe, which comprises a brake disc, wherein the brake disc is sleeved outside a main shaft, brake pads are arranged on the left end surface and the right end surface of the brake disc, one end of each brake pad, which is far away from the brake disc, is connected with a connecting plate, each connecting plate is connected with an elastic plate, the elastic plates are fixedly connected with a machine tool, and an oil cylinder piston mechanism for driving the brake pads to lock the brake disc is arranged between the two connecting plates. The device can eliminate the forward and reverse clearance of the C shaft, improve the machining precision of the machine tool, ensure the locking rigidity, and is safe and reliable.

Description

Zero clearance locking device of lathe C axle

Technical Field

The invention relates to the field of turning and milling composite machine tools in mechanical equipment, in particular to a zero clearance locking device for a C shaft of a lathe.

Background

After C-axis indexing, the lathe with the C-axis indexing function mills, drills and other workpieces, and generates large vibration during machining, so that a main shaft needs to be locked, the rigidity is improved, and the stability and the machining precision of milling, drilling and the like are ensured. However, in the existing C-axis locking device, the brake disc is directly locked by adopting the oil cylinder piston, and the oil cylinder piston has a radial clearance, so that a larger clearance still exists in the circumferential direction after the main shaft is locked, and the locking rigidity is extremely poor because the oil cylinder sealing element has larger elasticity.

Disclosure of Invention

Aiming at the problems, the invention discloses a zero-clearance C shaft locking device of a lathe, which can eliminate the positive and negative clearance of the C shaft, improve the processing precision of the lathe, ensure the locking rigidity, and is safe and reliable.

In order to achieve the technical purpose, the invention adopts the following technical scheme:

the utility model provides a zero clearance locking device of lathe C axle, includes the brake disc, the brake disc suit is in the main shaft outside, both ends face all is provided with the brake block about the brake disc, and the one end that the brake disc was kept away from to every brake block all is connected with the connecting plate, and every connecting plate all is connected with the elastic plate, elastic plate and lathe fixed connection are provided with the hydro-cylinder piston mechanism that is used for driving the brake block locking brake disc between two connecting plates.

Preferably, an oil cylinder in the oil cylinder piston mechanism is connected with a first connecting plate positioned on the right side of the brake disc, a piston in the oil cylinder piston mechanism is in contact connection with the left end face of a second brake pad, and the second brake pad is positioned on the left side of the brake disc.

Preferably, a reset device is installed on the left end face of the first connecting plate.

Preferably, the resetting device comprises a disc spring, the disc spring is connected with a pin shaft, the right end of the pin shaft is connected with the first connecting plate, the left end of the pin shaft is in contact connection with an adjusting screw, and the adjusting screw is connected with the second connecting plate.

Preferably, the left end of the oil cylinder is connected with a microswitch in a contact manner, and the microswitch is connected with the first connecting plate.

Preferably, the elastic plate is connected with a fixed seat, and the fixed seat is connected with a machine tool.

The device designs a plurality of hydraulic locking cylinder structures, adopts hydraulic drive locking, and the locking cylinder passes through the elastic plate installation, can carry out axial compensation to the locking position of locking cylinder and locking device mounted position error to realize C zero clearance locking, thoroughly eliminate the clearance that produces when traditional C axle locking is positive and negative rotatory, to machining precision and mill the influence of vibration. And a microswitch is arranged, so that the current locking state can be fed back to the numerical control system. The device improves the rigidity of the C shaft of the machine tool, thereby improving the processing precision and the service life of the cutter, and being safe and reliable.

The invention has the advantages of

According to the invention, the two sides of the brake disc are respectively connected with the brake pads by the elastic plates to realize axial floating clamping, when the brake disc is clamped, the oil cylinder is contacted with the brake disc through the brake pads to realize the clamping function, and the brake pads are all in rigid connection, so that a positive and negative clearance does not exist. The zero clearance locking device for the C shaft of the lathe can eliminate the forward and reverse clearances of the C shaft, can ensure the locking rigidity and has safe and reliable action.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of a C-axis gapless locking device of a lathe;

FIG. 2 is an enlarged view of a portion I of FIG. 1;

FIG. 3 is a cross-sectional view of the gapless locking device;

in the figure: 1. the brake disc, 2. the adapter sleeve, 3. the piston, 4. the micro-gap switch, 5. the switch support, 6. the hydro-cylinder, 7. the second connecting plate, 8. the elastic plate, 9. the fixing base, 10. the first connecting plate, 11. the first brake block, 12. the main shaft, 13. the headstock, 14. the round pin axle, 15. the dish spring, 16. the adjusting screw, 17, the second brake block.

Detailed Description

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

In the description of the present invention, it is to be understood that the terms "inner", "outer", "left" and "right" indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Referring to the attached drawings 1-3, a brake disc 1 is connected with a main shaft 12 through a connecting sleeve 2, two connecting plates are respectively arranged at the left end and the right end of the brake disc, a second brake block 17 is connected with the right end face of a second connecting plate 7, a first brake block 11 is connected with the left end face of a first connecting plate 10, and the position of the brake disc is locked through the contact of the two brake blocks and the brake disc. Locking device installs in headstock 13 rear end face through fixing base 9, the left end face at first connecting plate 10 is installed to 6 inline of three hydro-cylinder, the structure of hydro-cylinder 6 is Z shape, piston 3 installs in hydro-cylinder 6, the output of piston is located the right side, namely the piston top is connected with the left end face contact of second brake block 17, second connecting plate 7 is connected with fixing base 9 through elastic plate 8, first connecting plate 10 also is connected with fixing base 9 through elastic plate 8, piston 3 can be ejecting under hydraulic drive, promote second brake block 17, make elastic plate 8 produce axial deformation, make two brake block intervals diminish, press from both sides tight brake disc 1 and realize pressing from both sides tight locate function. When the brake disc needs to be loosened, hydraulic oil is released through the electromagnetic valve, and the piston 3 is reset. The dish spring 15 promotes round pin axle 14 and adjusting screw 16 end face contact, drives second connecting plate 7 and first connecting plate 10 separation, and then two brake blocks break away from brake disc 1, and the clearance between brake block 11 and the brake disc 1 is adjusted through adjusting screw 16 when loosening the back, screws up adjusting screw 16, and adjusting screw 16 moves to the left end, makes two

brake blocks

11 and 17 interval grow, guarantees that

brake block

11 and 17 and brake disc 1 thoroughly break away from. The microswitch 4 is fixed through the switch support 5, the switch support 5 is installed on the second connecting plate 7, a contact of the microswitch 4 is in surface contact with the oil cylinder 6, and when the microswitch is clamped, the distance between the oil cylinder 6 and the second connecting plate 7 is changed, so that the microswitch 4 is triggered, a clamping signal is sent to a system, and the safety and reliability of actions are guaranteed.

The left connecting plate and the right connecting plate are different in structure, the left connecting plate is provided with a through groove for placing an oil cylinder, the two groups of reset mechanisms are formed by pin shafts, disc springs and adjusting screws, and the two groups of reset mechanisms are distributed in a front-back symmetrical mode about the center of a brake disc or the connecting plate. The left end of the adjusting screw is fixed with the second connecting plate through a first locknut. The right end of the pin shaft is of a stud structure, and the stud structure limits the ejection amount through a second locknut and the first connecting plate.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A zero-clearance locking device for a C shaft of a lathe is characterized by comprising a brake disc, wherein the brake disc is sleeved outside a main shaft, brake pads are arranged on the left end surface and the right end surface of the brake disc, one end, far away from the brake disc, of each brake pad is connected with a connecting plate, each connecting plate is connected with an elastic plate, the elastic plate is fixedly connected with a machine tool, an oil cylinder piston mechanism for driving the brake pads to lock the brake disc is arranged between the two connecting plates, an oil cylinder in the oil cylinder piston mechanism is connected with a first connecting plate positioned on the right side of the brake disc, a piston in the oil cylinder piston mechanism is in contact connection with the left end surface of a second brake pad, the second brake pad is positioned on the left side of the brake disc, a reset device is arranged on the left end surface of the first connecting plate, the reset device comprises a disc spring, the disc is connected with a pin shaft, and the right end of the pin shaft is connected with the first connecting plate, and the left end of the pin shaft is in contact connection with an adjusting screw, and the adjusting screw is connected with the second connecting plate.

2. The zero clearance locking device for the C shaft of the lathe as claimed in claim 1, wherein a micro switch is connected to the left end of the oil cylinder in a contact manner, and the micro switch is connected with the first connecting plate.

3. The zero clearance locking device for the C shaft of a lathe according to claim 1, wherein the elastic plate is connected with a fixed seat, and the fixed seat is connected with a machine tool.