CN211386962U

CN211386962U - Spring clamping mechanism of numerical control lathe

Info

Publication number: CN211386962U
Application number: CN201922106168.1U
Authority: CN
Inventors: 肖时航
Original assignee: Guizhou Hangxing Kaihong Machinery Co ltd
Current assignee: Guizhou Hangxing Kaihong Machinery Co ltd
Priority date: 2019-11-29
Filing date: 2019-11-29
Publication date: 2020-09-01
Anticipated expiration: 2029-11-29

Abstract

The utility model discloses a numerical control lathe spring clamping mechanism, which comprises a main shaft and a pull rod arranged in the main shaft in a penetrating way, wherein one end of the pull rod is connected with a spring chuck, the other end of the pull rod penetrates through the main shaft and is connected with a claw seat, the main shaft is also sleeved with a sliding sleeve which controls the opening or contraction of a clamping jaw on the claw seat, the sliding sleeve is also sleeved with a bearing, and a shifting block which can radially move and can be propped against the periphery of the bearing is uniformly arranged outside the bearing; the shifting block is connected with a driving component which can drive the bearing to move along the axial direction of the main shaft. The shifting block arranged on the periphery of the bearing can move along the radial direction of the main shaft and can be tightly abutted against the periphery of the bearing, and the shifting block is connected with a driving assembly capable of moving along the axial direction of the main shaft, so that heating and vibration caused by friction between the shifting block and the bearing during rotation of the main shaft are avoided, and normal operation of a lathe can be ensured.

Description

Spring clamping mechanism of numerical control lathe

Technical Field

The utility model relates to a lathe technical equipment field, concretely relates to numerical control lathe spring clamping mechanism.

Background

Most of the existing economic numerically controlled lathes adopt a sliding sleeve moving spring chuck clamping mode, and the device has the advantages of simple structure, convenience in assembly and disassembly and low cost. The clamping and loosening of the spring chuck are realized through the connection of a pull rod, the pull rod is connected with a claw seat, three claws are arranged on the claw seat and are uniformly distributed on the circumference of the claw seat, and the claws are opened and contracted to drive the pull rod to move back and forth through the back and forth movement of a sliding sleeve with a taper, which is arranged on a main shaft, so that the clamping and loosening of the spring chuck are realized. In the existing clamping device, after a chuck is clamped, a sliding sleeve can drive a bearing to rotate when a main shaft rotates, and the shifting block always buckles the bearing and slightly rotates along with the bearing, so that the bearing and the shifting block can generate friction in different degrees, and heating and vibration are caused.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to provide a spring clamping mechanism of a numerical control lathe, which can prevent the main shaft from generating vibration and heating when the main shaft rotates normally; the specific scheme is as follows:

a numerical control lathe spring clamping mechanism comprises a main shaft and a pull rod arranged in the main shaft in a penetrating mode, wherein one end of the pull rod is connected with a spring chuck, the other end of the pull rod penetrates through the main shaft and is connected with a claw seat, the main shaft is further sleeved with a sliding sleeve for controlling opening or contraction of a clamping jaw on the claw seat, a bearing is further sleeved on the sliding sleeve, and a shifting block capable of radially moving and abutting against the periphery of the bearing is uniformly arranged on the outer side of the bearing; the shifting block is connected with a driving component which can drive the bearing to move along the axial direction of the main shaft.

In the technical scheme, the shifting blocks arranged on the periphery of the bearing can move along the radial direction of the main shaft, when each shifting block moves towards the axis of the main shaft, the shifting blocks can tightly abut against the periphery of the bearing, and the shifting blocks are connected with the driving assembly capable of moving along the axial direction of the main shaft, so that the shifting blocks can drive the bearing to move along the axial direction of the main shaft, and further drive the sliding sleeve to move along the axial direction of the sliding sleeve.

Preferably, the driving assembly comprises a sliding ring coaxially arranged with the main shaft, the inner wall of the sliding ring is provided with a plurality of pushing cylinders which are radially arranged along the sliding ring and connected with a corresponding shifting block, and when a push rod of each pushing cylinder pushes the corresponding shifting block, the shifting block can abut against a bearing. The pushing cylinder on the sliding ring can provide driving force for radial movement of the shifting block, so that the shifting block is abutted against or separated from the bearing.

Preferably, a reset spring is sleeved on a push rod of the pushing cylinder, one end of the reset spring pushes the pushing cylinder, the other end of the reset spring is fixed on the shifting block, and when the pushing cylinder loses pushing force, the shifting block can be far away from the bearing under the elastic action of the reset spring. The reset spring can make the shifting block quickly keep away from the bearing after losing thrust, thereby avoiding generating heat or vibration between the shifting block and the bearing.

Preferably, the end face of the sliding ring is provided with ball screws which are symmetrically arranged along the axial direction of the main shaft in a penetrating manner, nuts of the ball screws are fixed on the sliding ring, and when a screw of the ball screw rotates, the sliding ring can axially move along the main shaft. When the screw rod of the ball screw rotates, the screw rod can drive the shifting block which is propped against the bearing to move, and then the sliding sleeve is driven to move.

Preferably, the two ends of the ball screw are provided with mounting seats fixed on the numerically controlled lathe, and the mounting seat at one end of the ball screw is provided with a driving motor for driving the screw of the ball screw to rotate. The moving precision can be ensured by driving the ball screw to rotate through the driving motor.

Preferably, the surface of the shifting block opposite to the periphery of the bearing is provided with an anti-skidding supporting pad, and the outer surface of the anti-skidding supporting pad is provided with anti-skidding grains. The anti-skidding supporting pad can improve the shifting block and lean on the stability on the bearing.

Preferably, three jaws capable of expanding or contracting are uniformly arranged on the circumference of the jaw seat. Therefore, the sliding sleeve can apply balanced force to the clamping jaw, and the action stability of the clamping jaw is improved.

The utility model has the advantages that: the setting can follow main shaft radial movement at the shifting block of bearing periphery, can closely support and lean on in the bearing periphery, because the shifting block is connected with the drive assembly that can follow main shaft axial displacement, the sliding sleeve can drive the collet chuck action when removing, and the shifting block drives the bearing and removes and realizes and the bearing separation through radially keeping away from the bearing, because the shifting block and the bearing friction arouse generate heat and vibration when avoiding the rotation of main shaft, can ensure the normal operation of lathe, especially high-speed lathe, the utility model discloses effectively solved the technical problem who exists among the prior art, had higher practical value.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

Fig. 1 is a top view of a spring clamping mechanism of a numerically controlled lathe according to an embodiment.

Fig. 2 is a cross-sectional view of a spring clamping mechanism of a numerically controlled lathe according to an embodiment.

The meanings indicated by the respective reference numerals are as follows; the clamping device comprises a main shaft 100, a pull rod 200, a collet chuck 300, a claw seat 400, a clamping jaw 500, a sliding sleeve 600, a bearing 700, a shifting block 800, a pushing cylinder 900, a return spring 1000, a sliding ring 1100, a ball screw 1200 and a mounting seat 1300.

Detailed Description

Here, it is to be noted that the functions, methods, and the like related to the present invention are only conventional adaptive applications of the related art. Therefore, the present invention is an improvement of the prior art, which substantially lies in the connection relationship between hardware, not in the functions and methods themselves, that is, the present invention relates to a few functions and methods, but does not include the improvements proposed in the functions and methods themselves. The present invention is described for better illustration of the function and method for better understanding of the present invention.

As shown in fig. 1 and fig. 2, in an embodiment, the utility model provides a numerical control lathe spring clamping mechanism, including main shaft 100 and the pull rod 200 of setting in wearing to establish in main shaft 100, pull rod 200 one end is connected with collet chuck 300, and the other end runs through main shaft 100 and is connected with jaw seat 400, still overlaps on the main shaft 100 and has the sliding sleeve 600 that clamping jaw 500 on control jaw seat 400 opened or contracted, and through sliding sleeve 600 along the axial back-and-forth movement of main shaft 100, makes clamping jaw 500 of jaw seat 400 open or contract and drive pull rod 200 back-and-forth movement, thereby makes collet chuck 300 of the connecting rod other end press from both sides tightly and unclamp. The above structure is the prior art, and is not described herein again, and reference may be made to the technology described in the background art, and is not described herein again.

As shown in fig. 1 and fig. 2, in order to drive the sliding sleeve 600 to move, in this embodiment, a bearing 700 is further sleeved on the sliding sleeve 600, and there are four shifting blocks 800 uniformly arranged outside the bearing 700, the shifting blocks 800 being capable of radially moving the bearing 700 and abutting against the outer periphery of the bearing 700, and the shifting blocks 800 are uniformly arranged on the outer periphery of the bearing 700; the shifting block 800 is connected to a driving assembly capable of driving the bearing 700 to move axially along the main shaft 100. The shifting blocks 800 arranged on the periphery of the bearing 700 can move along the radial direction of the spindle 100, when each shifting block 800 moves towards the axis of the spindle 100, the shifting blocks can tightly abut against the periphery of the bearing 700, because the shifting blocks 800 are connected with a driving component capable of moving along the axial direction of the spindle 100, the shifting blocks 800 can drive the bearing 700 to move in the axial direction of the spindle 100, and further drive the sliding sleeve 600 to move along the axial direction thereof, the sliding sleeve 600 can drive the collet chuck 300 to act when moving, the shifting blocks 800 drive the bearing 700 to move, and the bearing 700 is separated from the bearing 700 by being away from the bearing 700 along the radial direction, so that heating and vibration caused by friction between the shifting blocks 800 and the bearing 700 when the spindle 100 rotates can be avoided, normal operation of a lathe, particularly a high-speed lathe can be ensured, and.

In order to drive the shifting block 800 to stably move, the driving assembly provided by this embodiment includes a sliding ring 1100 coaxially arranged with the main shaft 100, the inner wall of the sliding ring 1100 is provided with a plurality of pushing cylinders 900 radially arranged along the sliding ring 1100 and connected with a corresponding shifting block 800, and when the push rod of the pushing cylinder 900 pushes the shifting block 800, the shifting block 800 can abut against the bearing 700. The pushing cylinder 900 on the sliding ring 1100 can provide driving force for the radial movement of the shifting block 800, so that the shifting block 800 is abutted against or separated from the bearing 700. Further, a push rod of the pushing cylinder 900 is sleeved with a return spring 1000, one end of the return spring 1000 pushes the pushing cylinder 900, and the other end of the return spring is fixed on the shifting block 800, and when the pushing cylinder 900 loses thrust, the shifting block 800 can be far away from the bearing 700 under the elastic action of the return spring 1000. The return spring 1000 can make the shifting block 800 quickly get away from the bearing 700 after losing the thrust, thereby avoiding generating heat or vibration between the shifting block 800 and the bearing 700.

As shown in fig. 1 and 2, ball screws are symmetrically arranged along the axial direction of the main shaft 100 and are inserted into the end surfaces of the slip rings 1100, and nuts of the ball screws 1200 are fixed to the slip rings 1100, so that the slip rings 1100 can move along the axial direction of the main shaft 100 when the screws of the ball screws 1200 rotate. When the screw of the ball screw 1200 rotates, the shifting block 800 abutting against the bearing 700 can be driven to move, and then the sliding sleeve 600 is driven to move. In order to enable the screw of the ball screw 1200 to automatically rotate, the two ends of the ball screw 1200 are provided with mounting seats 1300 fixed on the numerically controlled lathe, and the mounting seat 1300 at one end of the ball screw 1200 is provided with a driving motor for driving the screw of the ball screw 1200 to rotate. The drive motor can be preferably a servo drive motor, and the moving precision can be further improved.

As shown in fig. 1 and 2, since the shifting block 800 needs to drive the bearing 700 to move when abutting against the outer periphery of the bearing 700, the surface of the shifting block 800 opposite to the outer periphery of the bearing 700 is provided with an anti-slip support pad, and the outer surface of the anti-slip support pad is provided with anti-slip lines. The anti-slip support pad can improve the stability of the toggle block 800 against the bearing 700. Further, three jaws 500 capable of being opened or closed are uniformly arranged on the circumference of the jaw base 400. This allows the sliding sleeve 600 to apply a uniform force to the clamping jaw 500, thereby improving the stability of the action of the clamping jaw 500.

As shown in fig. 1 and fig. 2, in this embodiment, when the collet chuck 300 needs to be clamped or loosened, the pushing cylinder 900 first acts to push the shifting block 800 to move radially toward the bearing 700 until it is pressed against the outer circumference of the bearing 700, and then the driving motor drives the screw of the ball screw 1200 to rotate, and the sliding ring 1100 can move axially along the main shaft 100, so that the shifting block 800 drives the bearing 700 to move axially, and thus the sliding sleeve 600 moves along with the movement of the bearing 700, so that the collet chuck 300 is clamped or loosened; after the collet chuck 300 finishes the action and before the main shaft 100 starts to rotate, the pushing cylinder 900 cancels the reasoning of the shifting block 800, and the shifting block 800 moves away from the bearing 700 under the action of the elastic force of the return spring 1000 until being separated from the bearing 700 to reset, so that the shifting block 800 and the bearing 700 are not contacted when the main shaft 100 rotates, the phenomena of heating and vibration caused by the friction of the shifting block 800 and the bearing 700 cannot be generated, and the normal operation of a high-speed lathe is ensured.

In the specification of the present invention, a large number of specific details are explained. It can be understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, systems, and techniques have not been shown in detail in order not to obscure an understanding of this description.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments can be modified, or some or all of the technical features can be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.

Claims

1. The utility model provides a numerical control lathe spring clamping mechanism, includes main shaft (100) and sets up pull rod (200) of wearing to establish in main shaft (100), pull rod (200) one end is connected with collet chuck (300), the other end runs through main shaft (100) and is connected with jaw seat (400), still cover on main shaft (100) and have clamping jaw (500) on control jaw seat (400) open or sliding sleeve (600) of shrink, still cover on sliding sleeve (600) and have a bearing (700), its characterized in that: the shifting block (800) capable of radially moving and abutting against the periphery of the bearing (700) is uniformly arranged on the outer side of the bearing (700); the shifting block (800) is connected with a driving component which can drive the bearing (700) to move along the axial direction of the main shaft (100).

2. The numerically controlled lathe spring clamping mechanism according to claim 1, wherein: the driving assembly comprises a sliding ring (1100) coaxially arranged with the main shaft (100), a plurality of pushing cylinders (900) which are radially arranged along the sliding ring (1100) and connected with a corresponding shifting block (800) are arranged on the inner wall of the sliding ring (1100), and when push rods of the pushing cylinders (900) push the shifting blocks (800), the shifting blocks (800) can abut against the bearings (700).

3. The numerically controlled lathe spring clamping mechanism according to claim 2, wherein: the push rod of the push cylinder (900) is sleeved with a return spring (1000), one end of the return spring (1000) pushes the push cylinder (900) to go up, the other end of the return spring is fixed on the shifting block (800), and when the push cylinder (900) loses thrust, the shifting block (800) can be far away from the bearing (700) under the elastic action of the return spring (1000).

4. The numerically controlled lathe spring clamping mechanism according to claim 3, wherein: the sliding ring (1100) is provided with ball screws (1200) which are axially and symmetrically arranged along the main shaft (100) in a penetrating mode on the end face, nuts of the ball screws (1200) are fixed on the sliding ring (1100), and when screws of the ball screws (1200) rotate, the sliding ring (1100) can axially move along the main shaft (100).

5. The numerically controlled lathe spring clamping mechanism according to claim 4, wherein: and mounting seats (1300) fixed on the numerical control lathe are arranged at two ends of the ball screw (1200), and a driving motor for driving a screw of the ball screw (1200) to rotate is arranged on the mounting seat (1300) positioned at one end of the ball screw (1200).

6. The numerically controlled lathe spring clamping mechanism according to claim 1, wherein: the surface that shifting block (800) and bearing (700) periphery are relative is equipped with anti-skidding supporting pad, be equipped with anti-skidding line on the anti-skidding supporting pad surface.

7. The numerically controlled lathe spring clamping mechanism according to claim 1, wherein: three clamping jaws (500) capable of being opened or contracted are uniformly arranged on the circumference of the jaw seat (400).