CN212496506U - Three-jaw chuck type guiding mechanism - Google Patents

Abstract

The utility model discloses a three-jaw chuck type guiding mechanism, which comprises a base, wherein a rear disc is fixed at the center of the base and is connected with a gear disc through a fixed connecting pin; the clamping concurrent circle formed by the three guide rollers is adopted to clamp the bar, so that the action of synchronously approaching to the center of a circle or synchronously keeping away from the center of a circle is realized, the accurate clamping of the bar is ensured, the clamping center is fixed, and the position of the center of the clamping concurrent circle can be adjusted as required. The processed bar stock is ensured to have certain clamping force and certain elastic support.

Description

Three-jaw chuck type guiding mechanism

Technical Field

The utility model belongs to the technical field of machining, concretely relates to three-jaw chuck formula guiding mechanism.

Background

In the existing clamping technology, most of devices commonly used in China are in a three-point self-centering center frame form such as a connecting rod centering roller type and a cam clamping type. When the common center frame assists in clamping workpieces with different diameters, the workpieces with different diameters are separately positioned and clamped, and the common center frame is difficult to accommodate automatic processing due to the fact that the common center frame is troublesome in assembling and disassembling, and has the defects of inaccurate guiding and positioning, multiple transmission points, complex mechanical driving, high failure rate and the like.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a three-jaw chuck formula guiding mechanism to solve the problem among the prior art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a three-jaw chuck type guide mechanism comprises a base, wherein a rear disc is fixed on the base and is connected with a gear disc through a fixed connecting pin;

circular through holes are respectively formed in the circle centers of the gear disc and the rear disc; three first sliding grooves are formed in the gear disc and are respectively arranged along three sides of the regular triangle; the rear disc is provided with three second sliding grooves which are respectively arranged along three perpendicular bisectors of the regular triangle;

the fixed connecting pin is simultaneously connected with the first sliding groove and the second sliding groove; an elastic clamping body is arranged at one end, located at the second sliding groove, of the fixed connecting pin, a guide roller frame is arranged on the elastic clamping body, a guide roller is arranged at one end of the guide roller frame, and the guide roller is arranged towards the circle center of the rear disc; the gear disc is meshed with the rack.

Furthermore, a sliding groove is arranged on the base, and the rack is slidably arranged in the sliding groove.

Further, the sliding groove is fixed at one side of the upper part of the base.

Furthermore, one end of the rack is connected with a first hydraulic cylinder, and the first hydraulic cylinder is used for driving the rack to further drive the gear disc to rotate.

Furthermore, one first sliding groove corresponds to one second sliding groove, and the corresponding first sliding groove and the corresponding second sliding groove are arranged perpendicularly to each other.

Further, the guide roller frame is parallel to the plane of the rear disc.

The utility model provides a beneficial effect that technical scheme brought is:

the embodiment of the utility model provides a three-jaw chuck formula guiding mechanism adopts the centre gripping concurrent circle that three guide roller formed, realizes the clamping action to the bar, and it has not only realized the action of synchronous being close to the centre of a circle or keeping away from the centre of a circle in step, ensures accurate centre gripping bar, and centre gripping center is fixed motionless, and the centre of a circle of centre gripping concurrent circle can also adjust the position as required moreover. The processed bar stock is ensured to have certain clamping force and certain elastic support.

The embodiment of the utility model provides a three-jaw chuck formula guiding mechanism can ensure the concentricity of cutter, pinch roll, front and back direction and rod, and it is very convenient to adjust when changing different diameter rods, has saved the time.

The embodiment of the utility model provides a three-jaw chuck formula guiding mechanism adopts hydraulic pressure just to be the power supply, need not consider the problem of auto-lock, convenient operation.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural view of a front part of a three-jaw chuck type guiding mechanism provided by an embodiment of the invention;

fig. 2 is a schematic structural view of a rear part of a three-jaw chuck type guiding mechanism provided by the embodiment of the invention;

fig. 3 is a schematic view of a second sliding chute structure of the three-jaw chuck type guiding mechanism according to the embodiment of the present invention;

fig. 4 is a schematic view of a first sliding chute structure of a three-jaw chuck type guiding mechanism provided in an embodiment of the present invention;

fig. 5 is a schematic view illustrating installation of a guide roller of the three-jaw chuck type guide mechanism according to the embodiment of the present invention;

fig. 6 is a front view of a three-jaw chuck type guiding mechanism provided by an embodiment of the present invention;

fig. 7 is a top view of a three-jaw chuck-type guiding mechanism provided by an embodiment of the present invention;

fig. 8 is a side view of a three-jaw chuck-type guiding mechanism provided by an embodiment of the present invention;

wherein: 1, a base; 2, dovetail grooves; 3 a gear disc; 4 fixing the connecting pin; 5, a rack; 6 a first hydraulic cylinder; 7 a second hydraulic cylinder; 8, a rear disc; 9 a guide wheel mechanism; 10, guiding a roller frame; 11 a guide roller shaft; 12, guiding a roller; 13 an elastic clamping body; 101 a first chute; 801 second runner.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

The following detailed description is exemplary in nature and is intended to provide further details of the invention. Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention.

The embodiment of the utility model provides a three-jaw chuck formula guiding mechanism has solved ordinary centre frame and when the work piece of the different diameters of auxiliary clamp, will all carry out the independent positioning to the work piece of every different diameter and press from both sides tightly, because loading and unloading work is troublesome, be difficult to bring into the inaccurate, many, the mechanical drive of transmission point of the guiding orientation, problem such as fault rate of existence of automated processing and all different degree.

As shown in fig. 1 and 2, the three-jaw chuck type guiding mechanism comprises a base 1 and a rack 5, wherein a rear disc 8 is fixed at the center of the base 1, and the rear disc 8 is connected with a gear disc 3 through a fixed connecting pin 4. The rear disc 8 and the gear disc 3 are both in a perfect circle shape. The gear disc 3 is arranged at the front and the rear disc 8 at the rear. Circular through holes are respectively formed in the circle centers of the gear disc 3 and the rear disc 8; three first sliding grooves 101 are formed in the gear disc 3, and the first sliding grooves 101 are respectively arranged along three sides of a regular triangle; the rear disc 8 is provided with three second sliding grooves 801, and the three second sliding grooves 801 are respectively arranged along three perpendicular bisectors of the regular triangle; the inner center of the regular triangle, the circle center of the gear disc 3 and the circle center of the rear disc 8 are all overlapped; the second sliding groove 801 is communicated with the circular through hole of the rear disk 8. The fixed connecting pin 4 is respectively and simultaneously connected with a corresponding first sliding chute 101 and a corresponding second sliding chute 801, one first sliding chute 101 corresponds to one second sliding chute 801, and the corresponding first sliding chute 101 and the corresponding second sliding chute 801 are arranged vertically.

One end of the rack 5 is connected with a first hydraulic cylinder 6 through a square connecting pin, and the first hydraulic cylinder 6 is used for driving the rack 5 to further drive the gear disc 3 to rotate; the transverse expansion of the first hydraulic cylinder 6 is converted into the rotation of the gear disc 3 in a gear-rack transmission mode. The bottom of the base 1 is provided with a dovetail groove sliding block and a dovetail groove 2 matched with the dovetail groove sliding block. The bottom of base 1 is connected with second pneumatic cylinder 7, second pneumatic cylinder 7 is used for driving base 1 is followed dovetail 2 moves, and the guide mechanism slides before convenient when the tool changing. The first hydraulic cylinder 6 can be changed into a stepping motor, and the power is converted into rotary motion by adopting the structural form of a worm gear and a worm, wherein the worm gear and worm device comprises a worm connected to the rotating shaft of the stepping motor and a worm wheel fixed at one end of the transmission shaft, and the worm is meshed with the worm wheel.

As shown in fig. 3 to 5, an elastic clamping body 13 is fixedly installed at one end of the fixed connection pin 4, which is located at the second sliding groove 801, a threaded through hole facing the center of the rear disc 8 is formed in the elastic clamping body 13, an external thread matched with the threaded through hole in the elastic clamping body 13 is formed in the guide roller frame 10, the guide roller frame 10 is installed on the elastic clamping body 13 in a threaded connection manner, the relative position of the guide roller frame 10 and the elastic clamping body 13 is adjustable, and the relative distance between the guide roller frame 10 and the elastic clamping body 13 can be adjusted according to the diameter of the bar stock; when the diameter of the bar stock is small, rotating the guide roller frame 10 to enable the guide roller 12 to move towards the circle center; when the diameter of the bar stock is large, the guide roller frame 10 is rotated to enable the guide roller 12 to move towards the center of the principle circle; the elastic clamping body 13 has another function of fixing the connecting pin 4 and preventing radial movement; one end of the guide roller frame 10 is provided with a guide roller 12 through a guide roller shaft 11, and the guide roller 12 is arranged towards the center of the rear disc 8; the guide roller frame 10 is parallel to the plane of the rear disk 8; the upper portion of base 1 installs the sliding tray, rack 5 slidable install in the sliding tray, rack 5 with gear disc 3 meshes mutually.

The utility model discloses three claw chuck formula guiding mechanism's theory of operation is:

when a bar passes through circular through holes of the gear disc 3 and the rear disc 8, the rack 5 is driven to slide along a sliding groove on the base 1 by controlling the expansion and contraction of the first hydraulic cylinder 6 through a switch, the fixed connecting pin 4 slides along a first sliding groove 101 on the gear disc 3 through the engagement of the gear disc 3 and the rack 5, the fixed connecting pin 4 slides to the circle center along a second sliding groove 801 on the rear disc 8 through the special distribution of the first sliding groove 101 on the gear disc 3 and the second sliding groove 801 on the rear disc 8, the three fixed connecting pins 4 move synchronously, and the centering and guiding are completed when the three guide rollers 12 are simultaneously contacted with the bar.

In the above-described operation principle, when the first hydraulic cylinder 6 has a maximum stroke, the retraction process of the hydraulic cylinder is a process of automatically centering the mechanism, and the process of raising the first hydraulic cylinder 6 to the maximum stroke again is a process of returning to the initial state at the end of the machining.

It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of the invention or which are equivalent to the scope of the invention are embraced by the invention.

Claims (6)

1. A three-jaw chuck type guide mechanism is characterized by comprising a base (1), wherein a rear disc (8) is fixed on the base (1), and the rear disc (8) is connected with a gear disc (3) through a fixed connecting pin (4);

circular through holes are respectively formed in the circle centers of the gear disc (3) and the rear disc (8); three first sliding grooves (101) are formed in the gear disc (3), and the first sliding grooves (101) are respectively arranged along three sides of a regular triangle; the rear disc (8) is provided with three second sliding grooves (801), and the three second sliding grooves (801) are respectively arranged along three perpendicular bisectors of the regular triangle;

the fixed connecting pin (4) is simultaneously connected with the first sliding chute (101) and the second sliding chute (801); an elastic clamping body (13) is arranged at one end, located on the second sliding groove (801), of the fixed connecting pin (4), a guide roller frame (10) is arranged on the elastic clamping body (13), a guide roller (12) is arranged at one end of the guide roller frame (10), and the guide roller (12) faces the circle center of the rear disc (8); the gear disc (3) is meshed with the rack (5).

2. Three-jaw chuck-type guiding mechanism according to claim 1, characterized in that the base (1) is fitted with a sliding groove in which the toothed rack (5) is slidably mounted.

3. Three-jaw chuck-type guiding mechanism according to claim 2, characterized in that the sliding groove is fixed at an upper side position of the base (1).

4. Three-jaw chuck-type guiding mechanism according to claim 1, characterized in that one end of the rack (5) is connected to a first hydraulic cylinder (6), and the first hydraulic cylinder (6) is used for driving the rack (5) and thus the gear disc (3) to rotate.

5. Three-jaw chuck-type guiding mechanism according to claim 1, characterized in that one of said first runners (101) corresponds to one of said second runners (801), the corresponding first runner (101) and second runner (801) being arranged perpendicular to each other.

6. Three-jaw chuck-type guiding mechanism according to claim 1, characterized in that the guide roller carriage (10) is parallel to the plane of the rear disc (8).

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