A four-jaw chuck for laser tube cutting machine

Abstract

The present invention relates to a four-jaw chuck for a laser tube cutting machine, comprising a fixed seat, a turntable is rotatably arranged on the fixed seat, and a transverse and longitudinal clamping devices are respectively arranged on the front side of the turntable, and the transverse and longitudinal clamping devices each comprise four rotating wheels arranged at four corners, wherein any three pairs of adjacent rotating wheels are transmission-coordinated by an annular flexible member, wherein two relatively arranged flexible members are respectively a first and a second driven flexible member, and the remaining flexible member is an active flexible member, and a pressure roller assembly is arranged between the outer side edge of the first driven flexible member and the inner side edge of the second driven flexible member, and between the inner side edge of the first driven flexible member and the outer side edge of the second driven flexible member, the pressure roller assembly of the transverse clamping device is arranged longitudinally, and the pressure roller assembly of the longitudinal clamping device is arranged transversely, and a driving device for driving the active flexible member to move is arranged on the turntable; the present invention has the characteristics of large jaw stroke, small size and low manufacturing cost.

Description

Technical Field

[0001] The invention relates to the technical field of laser tube cutting machines, and in particular to a four-jaw chuck for a laser tube cutting machine. Background Art

[0002] The common four-jaw chucks for laser tube cutting machines on the market include connecting rod cylinder structures, which are time-consuming and costly to process. They also have the following disadvantages: 1. The current chuck stroke size is mainly due to the cylinder being a direct-push structure, with a clamping range of 5-360mm, a small jaw stroke, and the traditional turntable middle opening is limited by the cylinder size, making it difficult to open a large hole; 2. If you encounter a workpiece larger than 360mm, a larger stroke is required. The large stroke requires a larger installation space in the diameter direction, which increases the required chuck size and weight, making the overall dimensions large and bulky. 3. The structure is complex, installation and disassembly are difficult, and the maintenance cost is high. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a four-jaw chuck for a laser tube cutting machine, which has the characteristics of large jaw stroke, small size and low manufacturing cost.

[0004] To solve the above technical problems, the present invention provides a four-jaw chuck, comprising a fixed seat, a turntable is rotatably arranged on the fixed seat, and a horizontal and vertical clamping device are respectively provided on the front side of the turntable, and the horizontal and vertical clamping devices each include four rotating wheels arranged at four corners, wherein any three pairs of adjacent rotating wheels are transmitted and cooperated through a ring-shaped flexible member, wherein the two relatively arranged flexible members are respectively the first and second driven flexible members, and the remaining flexible member is an active flexible member, and a pressure roller assembly is provided between the outer side edge of the first driven flexible member and the inner side edge of the second driven flexible member, and between the inner side edge of the first driven flexible member and the outer side edge of the second driven flexible member, the pressure roller assembly of the horizontal clamping device is longitudinally arranged, and the pressure roller assembly of the longitudinal clamping device is transversely arranged, and a driving device for driving the active flexible member to move is provided on the turntable.

[0005] Furthermore, the flexible member is a synchronous belt, and the rotating wheel is a synchronous pulley; through the synchronous belt transmission, the synchronization of the movement between the first and second driven flexible members can be better.

[0006] Furthermore, the driving device includes a double-piston rod cylinder, the outer ends of the two piston rods of the double-piston rod cylinder are fixedly connected to the front side of the turntable, and part of the outer edge of the active flexible part is fixedly connected to the cylinder body of the double-piston rod cylinder through a pressure plate; the double-piston rod cylinder is an automation standard part with low cost.

[0007] Furthermore, among the four rotating wheels arranged in four corners, the remaining pair of adjacent rotating wheels are also matched through a flexible member transmission, and part of the outer edge of the flexible member is driven to move by another driving device arranged on the turntable; the horizontal and longitudinal clamping devices are both driven by a pair of driving devices, the driving force is greater, and the synchronization of the movement between the first and second driven flexible members is better; the pair of driving devices are relatively arranged, so that the outer circle size of the turntable can be designed to be smaller.

[0008] Furthermore, the transverse and longitudinal clamping devices each include at least one optical axis, both ends of the optical axis are fixedly connected to the front side of the turntable, the pressure roller assembly includes a fixed plate, the fixed plate is slidably fitted on the optical axis through a linear bearing, at least one pressure roller is provided on the inner side of the fixed plate, both ends of the fixed plate are fixedly connected to the corresponding side edges of the first and second driven flexible members respectively through the pressure plate; the pressure roller assembly is guided by the optical axis and the linear bearing, so a pair of pressure roller assemblies can move in opposite directions smoothly and parallel to each other.

[0009] Furthermore, four wheel axles corresponding to the positions of the rotating wheels are vertically arranged on the front side of the turntable, and the rotating wheels are mounted on the wheel axles, wherein the distance between the axes of any two diagonally arranged wheel axles can be adjusted through a tensioning device; the distance between the axes of any two diagonally arranged wheel axles can be adjusted through a tensioning device, so that each flexible member can be in a tensioned state.

[0010] Furthermore, the tensioning device includes two relatively arranged C-shaped brackets, the C-shaped brackets are fixedly connected to the front side of the turntable, U-shaped grooves are opened on both end surfaces of the C-shaped brackets, the U-shaped grooves on both sides are respectively slidably matched with the two ends of the wheel axle, and adjusting screws are passed through both ends of the C-shaped bracket, and the adjusting screws are threadedly matched on the wheel axle; the position of the wheel axle in the U-shaped groove is controlled by adjusting the adjusting screws.

[0011] A working method of the above-mentioned four-jaw chuck for laser tube cutting machine comprises the following steps:

[0012] 1) The driving device drives the active flexible member to move, and at the same time drives the first and second driven flexible members to move synchronously. At this time, the outer side of the first driven flexible member and the inner side of the second driven flexible member move in the same direction, and the inner side of the first driven flexible member and the outer side of the second driven flexible member move in the same direction. Therefore, a pair of pressure roller assemblies move in opposite directions. When the pair of pressure roller assemblies move in a straight line toward each other, the pipe material can be clamped, and vice versa, the pipe material can be loosened. The pair of pressure roller assemblies of the transverse clamping device are used to clamp or loosen the pipe material transversely, and the pair of pressure roller assemblies of the longitudinal clamping device are used to clamp or loosen the pipe material longitudinally.

[0013] The beneficial effects of the present invention are as follows: the driving device drives the active flexible member to move, and at the same time drives the first and second driven flexible members to move synchronously. At this time, the outer side edge of the first driven flexible member and the inner side edge of the second driven flexible member move in the same direction, and the inner side edge of the first driven flexible member and the outer side edge of the second driven flexible member move in the same direction. Therefore, the pair of pressure roller assemblies move in opposite directions. When the pair of pressure roller assemblies move in a straight line toward each other, the pipe material can be clamped, and vice versa, the pipe material can be loosened. The pair of the transverse clamping device The pressure roller assembly is used for transversely clamping or loosening the pipe material, and the pair of pressure roller assemblies of the longitudinal clamping device are used for longitudinally clamping or loosening the pipe material; the four-jaw chuck of the present invention is synchronized and transmitted through a flexible member, and this structure makes full use of the horizontal space of the disc, so that the middle opening of the chuck turntable can be opened very large, the four-jaw chuck's claws (i.e., the pressure roller assembly) have a large stroke, and the flexible member is an automated standard part, which saves procurement time and is low in cost, thereby improving production efficiency; the four-jaw chuck of the present invention has the characteristics of large claw stroke, small size, and low manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to clearly illustrate the innovative principle of the invention and its advantages over existing four-jaw chucks, possible embodiments are described below by non-limiting examples of the application of the principle with the aid of the accompanying drawings. In the drawings:

[0015] Figure 1 An exploded view of a four-jaw chuck for a laser tube cutting machine of the present invention;

[0016] Figure 2 for Figure 1 A partial enlarged view of point C;

[0017] Figure 3 is a three-dimensional diagram of the four-jaw chuck;

[0018] Figure 4 for Figure 3 The main view;

[0019] Figure 5 for Figure 4 Section view at AA;

[0020] Figure 6 for Figure 4 Left view of . DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0023] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0024] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] Example 1

[0026] like Figure 1-6 A four-jaw chuck for a laser tube cutting machine in this embodiment comprises a fixed seat 1, on which a turntable 2 is rotatably arranged, and the front sides of the turntable 2 are respectively provided with transverse and longitudinal clamping devices 3 and 4, and the transverse and longitudinal clamping devices 3 and 4 each comprise four rotating wheels 5 arranged at four corners, wherein any three pairs of adjacent rotating wheels 5 are transmission-coordinated by an annular flexible member 6, wherein the two relatively arranged flexible members 6 are respectively the first and second driven flexible members 7 and 7-1, and the remaining flexible member 6 is the active flexible member 8, and a pressure roller assembly 9 is provided between the outer side edge of the first driven flexible member 7 and the inner side edge of the second driven flexible member 7-1, and between the inner side edge of the first driven flexible member 7 and the outer side edge of the second driven flexible member 7-1, the pressure roller assembly 9 of the transverse clamping device 3 is longitudinally arranged, and the pressure roller assembly 9 of the longitudinal clamping device 4 is transversely arranged, and a driving device 10 for driving the active flexible member 8 to move is provided on the turntable 2.

[0027] Preferably, the flexible member 6 is a synchronous belt, and the rotating wheel 5 is a synchronous pulley; the flexible member 6 can also be a chain or a rope, and correspondingly, the rotating wheel 5 is a sprocket or a pulley.

[0028] Preferably, the driving device 10 includes a double-piston rod cylinder 11, the outer ends of the two piston rods of the double-piston rod cylinder 11 are fixedly connected to the front side of the turntable 2, and part of the outer edge of the active flexible member 8 is fixedly connected to the cylinder body of the double-piston rod cylinder 11 through a pressure plate 12; the driving device 10 can also be composed of a motor and a screw-nut mechanism, and part of the outer edge of the active flexible member 8 is fixedly connected to the nut.

[0029] Preferably, among the four rotating wheels 5 arranged in a quadrangular pattern, the remaining pair of adjacent rotating wheels 5 are also coupled through a flexible member 6 , and part of the outer side of the flexible member 6 is driven to move by another driving device 10 disposed on the turntable 2 .

[0030] The transverse and longitudinal clamping devices 3 and 4 also include two optical axes 13 arranged at intervals, and both ends of the optical axis 13 are fixedly connected to the front side of the turntable 2. The pressure roller assembly 9 includes a fixed plate 14, and the fixed plate 14 is slidably fitted on the optical axis 13 through a linear bearing 15. At least one pressure roller Y is provided on the inner side of the fixed plate 14. Both ends of the fixed plate 14 are fixedly connected to the corresponding sides of the first and second driven flexible members 7 and 7-1 respectively through a pressure plate 19.

[0031] Four axles 20 corresponding to the positions of the rotating wheels 5 are vertically arranged on the front side of the rotating disk 2, and the rotating wheels 5 are sleeved on the axles 20, wherein the distance between the axes of any two diagonally arranged axles 20 can be adjusted through the tensioning device Z.

[0032] The tensioning device Z includes two relatively arranged C-shaped brackets 16, and the C-shaped brackets 16 are fixedly connected to the front side of the turntable 2. U-shaped grooves 17 are opened on both end surfaces of the C-shaped brackets 16. The U-shaped grooves 17 on both sides are respectively slidably matched with the two ends of the wheel axle 20. Adjustment screws 18 are passed through both ends of the C-shaped bracket 16, and the adjustment screws 18 are threadedly matched on the wheel axle 20.

[0033] Example 2

[0034] A working method of the four-jaw chuck described in embodiment 1 comprises the following steps:

[0035] The driving device 10 drives the active flexible member 8 to move, and at the same time drives the first and second driven flexible members 7 and 7-1 to move synchronously. At this time, the outer side edge of the first driven flexible member 7 and the inner side edge of the second driven flexible member 7-1 move in the same direction, and the inner side edge of the first driven flexible member 7 and the outer side edge of the second driven flexible member 7-1 move in the same direction. Therefore, a pair of pressure roller assemblies 9 move in opposite directions. When the pair of pressure roller assemblies 9 move in opposite directions, the pipe material can be clamped, otherwise the pipe material can be loosened. The pair of pressure roller assemblies 9 of the transverse clamping device 3 are used to clamp or loosen the pipe material laterally, and the pair of pressure roller assemblies 9 of the longitudinal clamping device 4 are used to clamp or loosen the pipe material longitudinally.

[0036] The driving device 10 drives the active flexible member 8 to move, and at the same time drives the first and second driven flexible members 7 and 7-1 to move synchronously. At this time, the outer side of the first driven flexible member 7 and the inner side of the second driven flexible member 7-1 move in the same direction, and the inner side of the first driven flexible member 7 and the outer side of the second driven flexible member 7-1 move in the same direction. Therefore, the pair of pressure roller assemblies 9 move in opposite directions. When the pair of pressure roller assemblies 9 move in a straight line toward each other, the pipe material can be clamped, and vice versa. To loosen the pipe material, a pair of pressure roller assemblies 9 of the transverse clamping device 3 are used to clamp or loosen the pipe material transversely, and a pair of pressure roller assemblies 9 of the longitudinal clamping device 4 are used to clamp or loosen the pipe material longitudinally; the four-jaw chuck of the present invention is synchronized and transmitted through the flexible member 6, and the claws (i.e., the pressure roller assemblies 9) of the four-jaw chuck of this structure have a large stroke, and the flexible member 6 is an automated standard part, which saves procurement time and is low in cost, thereby improving production efficiency; the four-jaw chuck of the present invention has the characteristics of large claw stroke, small size, and low manufacturing cost.

[0037] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A four-jaw chuck for a laser tube cutting machine, characterized in that: The invention comprises a fixed seat (1), a rotating disk (2) is rotatably arranged on the fixed seat (1), and a transverse and longitudinal clamping device are respectively arranged on the front side of the rotating disk (2), and the transverse and longitudinal clamping devices each comprise four rotating wheels (5) arranged at four corners, wherein any three pairs of adjacent rotating wheels (5) are driven and matched through an annular flexible member (6), wherein two relatively arranged flexible members (6) are respectively a first and a second driven flexible member, and the remaining flexible member (6) is an active flexible member (8), and between the outer side edge of the first driven flexible member (7) and the inner side edge of the second driven flexible member (7-1), and between the inner side edge of the first driven flexible member (7) and A pressure roller assembly (9) is provided between the outer sides of the second driven flexible member (7-1); the pressure roller assembly (9) of the transverse clamping device (3) is arranged longitudinally, and the pressure roller assembly (9) of the longitudinal clamping device (4) is arranged transversely; a driving device (10) for driving the active flexible member (8) to move is provided on the turntable (2); the driving device (10) comprises a double piston rod cylinder (11); the outer ends of the two piston rods of the double piston rod cylinder (11) are fixedly connected to the front side of the turntable (2); and part of the outer side of the active flexible member (8) is fixedly connected to the cylinder body of the double piston rod cylinder (11) via a first pressure plate (12); The transverse and longitudinal clamping devices each further include at least one optical axis (13), both ends of the optical axis (13) being fixedly connected to the front side of the turntable (2), the pressure roller assembly (9) comprising a fixed plate (14), the fixed plate (14) being slidably fitted on the optical axis (13) via a linear bearing (15), at least one pressure roller (Y) being provided on the inner side of the fixed plate (14), and both ends of the fixed plate (14) being fixedly connected to corresponding side edges of the first and second driven flexible members respectively via a second pressure plate (19); Four wheel axles (20) corresponding to the positions of the rotating wheels (5) are vertically arranged on the front side of the rotating disk (2), and the rotating wheels (5) are sleeved on the wheel axles (20), wherein the distance between the axes of any two diagonally arranged wheel axles (20) can be adjusted through a tensioning device (Z); the tensioning device (Z) comprises two C-shaped brackets (16) arranged opposite to each other, the C-shaped brackets (16) are fixedly connected to the front side of the rotating disk (2), U-shaped grooves (17) are formed on both end surfaces of the C-shaped brackets (16), and the U-shaped grooves (17) on both sides are respectively slidably matched with the two ends of the wheel axles (20), and adjustment screws (18) are penetrated at both ends of the C-shaped bracket (16), and the adjustment screws (18) are threadedly matched on the wheel axles (20).

2. The four-jaw chuck according to claim 1, characterized in that: The flexible member (6) is a synchronous belt, and the rotating wheel (5) is a synchronous belt pulley.

3. The four-jaw chuck according to claim 1, characterized in that: Among the four rotating wheels (5) arranged in a quadrangular pattern, the remaining pair of adjacent rotating wheels (5) are also driven and matched via a flexible member (6), and a portion of the outer side edge of the flexible member (6) is driven to move via another driving device (10) disposed on the rotating disk (2).

4. A method for operating a four-jaw chuck for a laser tube cutting machine according to claim 1, characterized in that: The following steps are involved: 1) The driving device (10) drives the active flexible member (8) to move, and at the same time drives the first and second driven flexible members to move synchronously. At this time, the outer side of the first driven flexible member (7) and the inner side of the second driven flexible member (7-1) move in the same direction, and the inner side of the first driven flexible member (7) and the outer side of the second driven flexible member (7-1) move in the same direction. Therefore, the pair of pressure roller assemblies (9) move in opposite directions. When the pair of pressure roller assemblies (9) move linearly towards each other, the pipe material can be clamped, and vice versa, the pipe material can be loosened. The pair of pressure roller assemblies (9) of the transverse clamping device (3) are used to clamp or loosen the pipe material transversely, and the pair of pressure roller assemblies (9) of the longitudinal clamping device (4) are used to clamp or loosen the pipe material longitudinally.

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