CN218169431U - Spring protector for central frame arm and self-centering central frame - Google Patents

Abstract

The utility model relates to the technical field of lathe accessories, in particular to a spring protector for a central frame arm and a self-centering central frame; the center frame comprises a middle arm and a pair of side arms which are symmetrically arranged along the center line of the center frame, the tops of the middle arm and the pair of side arms are respectively provided with an idler wheel through a pin shaft, the middle part enclosed by the middle arm and the pair of side arms is used for accommodating a workpiece to be clamped, the pair of side arms are respectively provided with a spring protector in a covering mode around the corresponding idler wheel, and each spring protector comprises a protection main body, a grinding head, a pin rod and a spring; the spring protector for the central frame arm can completely scrape and sweep the scrap iron remained on the roller surface, and the scrap iron is prevented from being adhered to the roller surface to damage the roller surface and the workpiece surface; and the grinding head is worn and can be replaced at any time, and the use is convenient.

Description

Spring protector for central frame arm and self-centering central frame

Technical Field

The utility model relates to a lathe annex technical field, in particular to spring protector and from centering centre frame for centre frame arm.

Background

In order to improve the processing efficiency and process round rotary long and thin shaft parts, the modern numerical control equipment generally adopts a machine tool center frame to clamp a workpiece, and three claws of the machine tool center frame are mostly in a roller type roller form, so that the machine tool center frame has the advantages of high positioning precision, high rotating speed, simplicity and quickness, and the surface of the workpiece is not easy to clamp and damage; it can be said that, among most machine tool accessories, the machine tool center frame accessory is an indelible choice for machining long and thin shaft parts. The machine tool center frame is mainly used for processing the end face, the excircle and the inner hole of a long and thin shaft part shaft, the machine tool center frame selects the position of the center frame according to a workpiece, the machine tool center frame is arranged on a matched base support, the base support is arranged on a guide rail of a machine tool, the center is adjusted through low-speed rotation, and lubricating grease is properly added between a roller of the machine tool center frame and the workpiece.

The roller at the end part of the arm of the center frame rotates along with a workpiece to be processed, and is a wear-resistant part, when a machine tool turns the workpiece, scrap iron is adhered to the surface of the workpiece, and when the roller rotates along with the surface of the workpiece, the scrap iron is adhered to the roller, so that the roller is damaged, scratches or indentations are formed on the surface of the workpiece, and the turning quality and the finish of the workpiece are affected.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the purpose is: the utility model provides a spring protector for centre frame arm and from centering centre frame to solve among the prior art the gyro wheel of the arm tip of centre frame and rotate along with waiting to process the work piece, for wearing and tearing the piece, when the lathe was turned the work piece, there was iron fillings to glue on the work piece surface, iron fillings glued on the gyro wheel when the gyro wheel rotated together along with the surface of work piece, not only caused the damage to the gyro wheel, still formed mar or indentation to the surface of work piece, influenced the quality of turning work piece and the smooth finish of surface problem.

The technical scheme of the utility model is that: a spring protector for a center frame arm and a self-centering center frame are provided, wherein the center frame comprises a middle arm and a pair of side arms which are symmetrically arranged along the center line of the center frame, rollers are mounted at the tops of the middle arm and the pair of side arms through pin shafts, the middle surrounded by the middle arm and the pair of side arms is used for accommodating a workpiece to be clamped, the pair of side arms are respectively covered with the spring protector around the corresponding roller, and each spring protector comprises a protection main body, a grinding head, a pin rod and a spring; the protective main body is hinged to two end parts of the pin shaft, the grinding head is fixed to one end, close to a workpiece to be clamped, of the protective main body, and the pin rod penetrates through the protective main plate and the spring in sequence and then is fixed to the side arm; when the central frame clamps the workpiece to be clamped, the protective main body swings towards the side far away from the workpiece to be clamped by taking the pin shaft as the circle center to cause the spring to be compressed, and the grinding head is propped against the outer surface of the workpiece under the counter-acting force of the spring.

Preferably, the protection main body is provided with a U-shaped groove, and the pin rod penetrates through the U-shaped groove to be inserted into the protection main board.

Preferably, one end of the spring is in contact with the outer wall of the side arm, the other end of the spring is in contact with the inner wall of the protection body, and the initial state of the spring is a natural state or a compressed state.

Preferably, the abutting end of the grinding head and the workpiece to be clamped is in a sharp-horn shape.

The utility model discloses still provide a technical scheme and do: a self-centering center frame comprises a shell, a middle arm and side arms, wherein the middle arm is arranged in the shell in a sliding mode, the side arms are symmetrically arranged on the two sides of the middle arm in a left-right mode and comprise a first side arm and a second side arm, and the first side arm and the second side arm are hinged to the shell in a lever mode and are partially located in the shell; the top ends of the first side arm, the second side arm and the middle arm are respectively provided with a roller; the first side arm and the second side arm are respectively covered with the spring protector around the central shaft of the corresponding roller;

the gyro wheel centre gripping on arm, first side arm, the second side arm or unclamp the actuating mechanism of work piece in still including the drive, actuating mechanism includes that driving piece, one end articulate first fan-shaped driving plate and the fan-shaped driving plate of second on the casing, with the bottom mounting of well arm and be the thrust body of class isosceles trapezoid shape, the thrust body is bilateral symmetry structure, the two bilateral symmetry of first fan-shaped driving plate and the fan-shaped driving plate of second.

Preferably, the driving piece comprises a piston rod, the top end of the piston rod is fixedly connected with the bottom end of the thrust body, the first side arm is in transmission connection with the thrust body through a first fan-shaped transmission plate, and the second side arm is in transmission connection with the thrust body through a second fan-shaped transmission plate.

Preferably, the left side face and the right side face of the thrust body are symmetrically provided with a first driving arc face and a second driving arc face which are in splayed curved surface shapes and used for pushing the first side arm and the second side arm to synchronously move, the bottom end of the first side arm is provided with a first rolling transmission wheel which is used for rolling and jacking to contact with the first driving arc face, and the bottom end of the second side arm is provided with a second rolling transmission wheel which is used for rolling and jacking to contact with the second driving arc face.

Preferably, the top end of the thrust body is fixed with the bottom end of the middle arm; the bottom of the first sector transmission plate is hinged with the shell, and the middle part and the top part are respectively in sliding fit with the first side arm and the thrust body through a pin shaft and a notch to control the action of the first side arm; the bottom of the second sector transmission plate is hinged with the shell, and the middle part and the top of the second sector transmission plate are respectively matched with the second side arm and the thrust body in a sliding mode through a pin shaft and a notch to control the action of the second side arm.

Preferably, a first waist-shaped through groove is formed in the top of the first sector transmission plate, a first arc-shaped groove is formed in the middle of the first sector transmission plate, a first pin shaft capable of sliding in the first waist-shaped through groove is arranged on the first side arm corresponding to the first waist-shaped through groove, and a second pin shaft capable of sliding in the first arc-shaped groove is arranged on the thrust body corresponding to the first arc-shaped groove; the top of the second fan-shaped transmission plate is provided with a second waist-shaped through groove, the middle of the second fan-shaped transmission plate is provided with a second arc-shaped groove, a third pin shaft capable of sliding in the second waist-shaped through groove is arranged at the position, corresponding to the second waist-shaped through groove, of the second side arm, and a fourth pin shaft capable of sliding in the second arc-shaped groove is arranged at the position, corresponding to the second arc-shaped groove, of the thrust body.

Preferably, the housing comprises an upper housing and a lower housing which are fixed together in a covering manner and form an inner space.

Compared with the prior art, the utility model has the advantages that:

(1) The utility model discloses in a spring protector for centre frame arm, including the protection main part, the bistrique, the pin rod, the spring, when centre frame will treat that the centre gripping work piece presss from both sides tightly, the protection main part uses the round pin axle to treat centre gripping work piece sidesway swing and lead to the spring to be compressed as keeping away from as the centre of a circle, bistrique and work piece surface support mutually under the reaction force of spring to this scrapes the iron fillings remaining on the gyro wheel face and sweeps totally, avoids iron fillings to glue on the gyro wheel face, causes the damage to gyro wheel face and work piece, and the bistrique has worn and torn and to change at any time, and it is convenient to use.

(2) The utility model discloses well from the centre frame of centering can realize automatic centering, and centering precision is high, and the automation line of being convenient for uses in batches greatly, improves production line automation efficiency.

Drawings

The invention will be further described with reference to the following drawings and examples:

fig. 1 is a schematic structural view of the protection body of the present invention;

fig. 2 is a schematic structural view of a self-centering steady rest according to the present invention;

fig. 3 is an enlarged schematic view of a portion a in fig. 2.

Wherein: 1. the device comprises a first side arm, a second side arm, a roller, a spring protector, a protection body 41, a protection main body 42, a U-shaped groove, a grinding head 43, a pin rod 44, a spring 45, a driving piece 5, a driving piece 6, a first fan-shaped transmission plate 7, a second fan-shaped transmission plate 8, a thrust body 9 and a middle arm.

Detailed Description

The following detailed description is made in conjunction with specific embodiments of the present invention:

in the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

As shown in fig. 1 and 3, a spring protector for a center frame arm, the center frame includes a middle arm 9 and a pair of side arms symmetrically arranged along a center line thereof, in this embodiment, the pair of side arms are respectively a first side arm 1 and a second side arm 2, the top portions of the middle arm 9 and the pair of side arms are respectively provided with a roller 3 through a pin, the middle part enclosed by the middle arm 9 and the pair of side arms is used for accommodating a workpiece to be clamped, the pair of side arms are respectively provided with a spring protector 4 around the corresponding roller 3, each spring protector 4 includes a protection main body 41, a grinding head 43, a pin 44, and a spring; the protection main part 41 articulates at the both ends of round pin axle, and bistrique 43 passes through the screw fixation and is close to the one end of treating centre gripping work piece in protection main part 41, and bistrique 43 wearing and tearing can change when reaching the certain degree, and it is convenient to use. The pin rod 44 is inserted into the protection main board and the spring in sequence and then fixed on the side arm; when the centre frame will treat that the centre gripping work piece presss from both sides tightly, protection main part 41 uses the round pin axle to keep away from to treat that centre gripping work piece side swing and lead to the spring to be compressed, and bistrique 43 and work piece surface are supported mutually under the reaction force of spring to this scrapes the clean with remaining iron fillings on 3 faces of gyro wheel, avoids iron fillings to glue on 3 faces of gyro wheel, causes the damage to 3 faces of gyro wheel and work piece. The protection main body 41 is provided with a U-shaped groove 42, and a pin rod 44 penetrates through the U-shaped groove 42 and is inserted into the protection main board. One end of the spring is in contact with the outer wall of the side arm, the other end of the spring is in contact with the inner wall of the protection body 41, and the initial state of the spring is a natural state or a compressed state. The abutting end of the grinding head 43 and the workpiece to be clamped is in a sharp angle shape.

The utility model discloses still provide a technical scheme and do: a self-centering center frame comprises a shell, a middle arm 9 and side arms, wherein the middle arm 9 is arranged in the shell in a sliding mode, the side arms are symmetrically arranged on two sides of the middle arm 9, each side arm comprises a first side arm 1 and a second side arm 2, the first side arm 1 and the second side arm 2 are hinged to the shell in a lever mode, and parts of the first side arm 1 and the second side arm 2 are located in the shell; the top ends of the first side arm 1, the second side arm 2 and the middle arm 9 are provided with rollers 3; the first and second side arms 1 and 2 are each covered with the spring protector 4 as described above around the central axis of the corresponding roller 3.

The drive mechanism that arm 9, the 3 centre gripping of gyro wheel on first side arm 1, the second side arm 2 or unclamp the work piece in still including the drive, drive mechanism includes driving piece 5, one end articulates first fan-shaped driving plate 6 and the fan-shaped driving plate 7 of second on the casing, with the bottom mounting of well arm 9 and be the thrust body 8 of class isosceles trapezoid shape, thrust body 8 is bilateral symmetry structure, the two bilateral symmetry of first fan-shaped driving plate 6 and the fan-shaped driving plate 7 of second.

The driving member 5 includes a piston rod, and a top end of the piston rod is fixedly connected to a bottom end of the thrust body 8, in this embodiment, the driving member 5 may be an air cylinder or a hydraulic cylinder; first side arm 1 is connected with the transmission of thrust body 8 through first fan-shaped driving plate 6, and second side arm 2 is connected with the transmission of thrust body 8 through second fan-shaped driving plate 7.

The left side face and the right side face of the thrust body 8 are symmetrically provided with a first driving arc face and a second driving arc face which are in splayed curved surface shapes and used for pushing the first side arm 1 and the second side arm 2 to move synchronously, a first rolling driving wheel used for being in rolling abutting contact with the first driving arc face is installed at the bottom end of the first side arm 1, and a second rolling driving wheel used for being in rolling abutting contact with the second driving arc face is installed at the bottom end of the second side arm 2.

The top end of the thrust body 8 is fixed with the bottom end of the middle arm 9; the bottom of the first sector transmission plate 6 is hinged with the shell, and the middle part and the top part are respectively matched with the first side arm 1 and the thrust body 8 in a sliding way through a pin shaft and a notch so as to control the action of the first side arm 1; the bottom of the second sector transmission plate 7 is hinged with the shell, and the middle part and the top part are respectively matched with the second side arm 2 and the thrust body 8 in a sliding way through a pin shaft and a notch to control the action of the second side arm 2.

A first waist-shaped through groove is formed in the top of the first fan-shaped transmission plate 6, a first arc-shaped groove is formed in the middle of the first fan-shaped transmission plate, a first pin shaft capable of sliding in the first waist-shaped through groove is arranged on the first side arm 1 corresponding to the first waist-shaped through groove, and a second pin shaft capable of sliding in the first arc-shaped groove is arranged on the thrust body 8 corresponding to the first arc-shaped groove; the top of the second fan-shaped transmission plate 7 is provided with a second waist-shaped through groove, the middle part of the second fan-shaped transmission plate is provided with a second arc-shaped groove, a third pin shaft which can slide in the second waist-shaped through groove is arranged at the position, corresponding to the second waist-shaped through groove, of the second side arm 2, and a fourth pin shaft which can slide in the second arc-shaped groove is arranged at the position, corresponding to the second arc-shaped groove, of the thrust body 8. The housing includes an upper housing and a lower housing that are secured together and form an interior space.

In the embodiment, taking fig. 2 as an example, when a piston rod of a driving member 5 is pushed out, the piston rod pushes a pushing body 8 to move upwards, the pushing body 8 moves upwards to drive a middle arm 9 to extend upwards along the central line of the center frame, and simultaneously the pushing body 8 moves upwards to drive the upper ends of a first side arm 1 and a second side arm 2 to clamp synchronously, at the same speed, concentrically and at the same pressure through a first rolling transmission wheel and a second rolling transmission wheel respectively, so that a workpiece is centered and clamped; similarly, when the piston rod of the driving member 5 retracts, the piston rod drives the thrust body 8 to move downwards, the downward movement of the thrust body 8 drives the middle arm 9 to retract downwards along the central line of the central frame, and simultaneously, the downward movement of the thrust body 8 respectively pulls back and opens the upper ends of the first side arm 1 and the second side arm 2 synchronously, at the same speed, concentrically and simultaneously through the first fan-shaped transmission plate 6 and the second fan-shaped transmission plate 7, so that the workpieces are loosened.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. It is obvious to a person skilled in the art that the invention is not limited to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention, and that the embodiments are therefore to be considered in all respects as exemplary and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims (10)

1. The utility model provides a spring protector for centre frame arm, the centre frame includes well arm and a pair of side arm that sets up along its central line symmetry, well arm and a pair of the gyro wheel is all installed through the round pin axle in the top of side arm, well arm, a pair of the centre that the side arm encloses and closes is used for holding treating centre gripping work piece, its characterized in that: spring protectors are arranged on the pair of side arms in a covering mode around the corresponding idler wheels, and each spring protector comprises a protection main body, a grinding head, a pin rod and a spring; the protective main body is hinged to two end parts of the pin shaft, the grinding head is fixed to one end, close to a workpiece to be clamped, of the protective main body, and the pin rod penetrates through the protective main board and the spring in sequence and then is fixed to the side arm; when the central frame clamps the workpiece to be clamped, the protective main body swings towards the side far away from the workpiece to be clamped by taking the pin shaft as the center of a circle to cause the spring to be compressed, and the grinding head is propped against the outer surface of the workpiece under the counter-acting force of the spring.

2. A spring guard for a central frame arm as defined in claim 1, wherein: the protection main body is provided with a U-shaped groove, and the pin rod penetrates through the U-shaped groove to be inserted into the protection main board.

3. A spring guard for a central frame arm as defined in claim 1, wherein: spring one end and the outer wall contact of side arm, the other end and the inner wall contact of protection main part, just spring initial condition is natural state or by compression state.

4. A spring guard for a central frame arm as defined in claim 1, wherein: the abutting end of the grinding head and the workpiece to be clamped is in a sharp-horn shape.

5. A self-centering steady rest comprising a housing, characterized in that: the device comprises a middle arm arranged in a shell in a sliding manner, and side arms symmetrically arranged at the two sides of the middle arm in a left-right manner, wherein the side arms comprise a first side arm and a second side arm which are hinged on the shell in a lever manner and are partially positioned in the shell; the top ends of the first side arm, the second side arm and the middle arm are respectively provided with a roller; the first side arm and the second side arm are respectively provided with a spring protector according to any one of claims 1-4 in a covering mode around the central shaft of the corresponding roller;

the gyro wheel centre gripping on arm, first side arm, the second side arm or unclamp the actuating mechanism of work piece in still including the drive, actuating mechanism includes that driving piece, one end articulate first fan-shaped driving plate and the fan-shaped driving plate of second on the casing, with the bottom mounting of well arm and be the thrust body of class isosceles trapezoid shape, the thrust body is bilateral symmetry structure, the two bilateral symmetry of first fan-shaped driving plate and the fan-shaped driving plate of second.

6. A self-centering steady rest according to claim 5, wherein: the driving piece comprises a piston rod, the top end of the piston rod is fixedly connected with the bottom end of the thrust body, the first side arm is in transmission connection with the thrust body through a first fan-shaped transmission plate, and the second side arm is in transmission connection with the thrust body through a second fan-shaped transmission plate.

7. A self-centering steady rest according to claim 6, wherein: the left side face and the right side face of the thrust body are symmetrically provided with a first driving arc face and a second driving arc face which are in splayed curved surface shapes and used for pushing the first side arm and the second side arm to move synchronously, a first rolling driving wheel used for being in rolling abutting contact with the first driving arc face is installed at the bottom end of the first side arm, and a second rolling driving wheel used for being in rolling abutting contact with the second driving arc face is installed at the bottom end of the second side arm.

8. A self-centering steady rest according to claim 5, wherein: the top end of the thrust body is fixed with the bottom end of the middle arm; the bottom of the first sector transmission plate is hinged with the shell, and the middle part and the top part are respectively in sliding fit with the first side arm and the thrust body through a pin shaft and a notch to control the action of the first side arm; the bottom of the second sector transmission plate is hinged with the shell, and the middle part and the top of the second sector transmission plate are respectively matched with the second side arm and the thrust body in a sliding mode through a pin shaft and a notch to control the action of the second side arm.

9. A self-centering steady rest according to claim 5, wherein: a first waist-shaped through groove is formed in the top of the first fan-shaped transmission plate, a first arc-shaped groove is formed in the middle of the first fan-shaped transmission plate, a first pin shaft capable of sliding in the first waist-shaped through groove is arranged on the first side arm corresponding to the first waist-shaped through groove, and a second pin shaft capable of sliding in the first arc-shaped groove is arranged on the thrust body corresponding to the first arc-shaped groove; the top of the second fan-shaped transmission plate is provided with a second waist-shaped through groove, the middle of the second fan-shaped transmission plate is provided with a second arc-shaped groove, a third pin shaft capable of sliding in the second waist-shaped through groove is arranged at the position, corresponding to the second waist-shaped through groove, of the second side arm, and a fourth pin shaft capable of sliding in the second arc-shaped groove is arranged at the position, corresponding to the second arc-shaped groove, of the thrust body.

10. A self-centering steady rest according to claim 5, wherein: the housing includes an upper housing and a lower housing that are secured together and form an interior space.

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