Laser chuck and machine tool

Abstract

The utility model discloses a laser chuck and a machine tool, the laser chuck comprises a clamping part, a transmission part and a clamping power source part providing clamping power for the clamping part, the transmission part is hollow, the transmission part is sequentially provided with two groups of identical planetary gear trains, and the planetary gear trains are connected with the clamping power source part. The clamping part is rotatably arranged on the transmission part in a penetrating manner; the utility model has the beneficial effects that the transmission part is adopted to output differential power, is arranged outside the clamping part and does not rotate together with the clamping part, and the clamping part is arranged on the transmission part in a penetrating manner; when power is output from the clamping power source part and then transmitted to a moving block of the clamping part which can rotate relatively through a planetary gear train of the transmission part, the position of a clamping jaw is adjusted through an adjusting mechanism, and therefore the laser chuck can clamp objects in different shapes and is suitable for the objects in different shapes. The cost is greatly reduced, the size is small, the structure is simple, and the service life is long.

Description

Technical Field

[0001] The utility model relates to the field of chuck fixtures, in particular to a laser chuck and a machine tool. Background Art

[0002] Chucks are indispensable fixtures in lathes, turning and milling centers, laser tube cutting machines, etc. Laser chucks are used in laser tube cutting machines to clamp square tubes, flat tubes, channels, I-beams, etc. for rotation, which can greatly improve processing efficiency. Laser chucks are divided into front laser chucks and rear feeding laser chucks, which are collectively referred to as laser chucks. Existing laser chucks use air slip rings or electric slip rings to drive the movement of the jaws, and the laser chuck has a small stroke, and the position of the jaws needs to be adjusted manually for many times to apply to parts with large size differences. Metal dust will be generated in the laser cutting environment, which will greatly harm the electric slip rings or air slip rings. For example, the air slip ring method requires the relatively static object to be transported to the relatively rotating object, which puts forward sealing requirements. And high requirements, and due to the friction generated at the sealing point, the rotation speed and life of the chuck will be greatly limited. This method has a relatively complex structure and high processing cost, and cannot achieve control of a specific distance. The electric slip ring method is also complex in structure and high in cost. The slip ring is easy to wear, and safety accidents are prone to occur after the electric slip ring is damaged. The electric slip ring or air slip ring method places the power output part in the chuck body and rotates with the chuck, which results in a very large size of the laser chuck and greatly increases the cost. In addition, since the laser chuck needs to be suitable for unequal or special-shaped materials such as flat steel, channel steel, I-beam, etc., the clamping jaws need to be able to achieve rapid fine-tuning. The existing laser chuck has no fine-tuning mechanism and requires multiple measurements and adjustments. At the same time, the chucks in other machine tools such as lathes also have the same technical defects as laser chucks.

[0003] Therefore, the inventor has proposed a technical solution of a laser chuck after intensive research. Summary of the invention

[0004] In order to solve the problems raised in the above-mentioned background technology, the utility model discloses a laser chuck, comprising: a clamping part, a transmission part and a clamping power source part for providing clamping power for the clamping part, the transmission part is hollow, and the transmission part is sequentially provided with two sets of identical planetary gear trains, the clamping part can be rotatably penetrated on the transmission part, and can be led out from the other end thereof, the clamping part is provided with a chuck body, one end surface of the chuck body is provided with na first slide grooves, and the other end is provided with a first annular countersunk hole connected with the first slide groove, each A moving block is slidably arranged in each of the first sliding grooves, an adjustment mechanism is installed on each of the moving blocks, a clamping claw is installed on each of the adjustment mechanisms, and the clamping power source part is installed on the outer side of the transmission part. When power is output from the clamping power source part, the differential motion is output through the planetary gear system of the transmission part to the clamping part that can rotate relatively, so that the clamping part can realize independent movement of the moving block in any rotation speed state of rotation or stillness, and the position of the clamping claw is adjusted by the adjustment mechanism, and na is an integer greater than or equal to 2.

[0005] The clamping part also includes a chuck mounting shaft, a chuck driving tooth, and a clamping claw driving a wire reel, each of the adjustment mechanisms includes: an adjusting slider, an adjusting screw, an end face of one side of the first annular countersunk hole of the chuck main body is fixedly connected to an end face of the chuck mounting shaft, and the chuck driving tooth is fixed to the other end face of the chuck mounting shaft, so as to connect an external power to drive the chuck main body and the clamping claw thereon to rotate, the clamping claw driving wire reel is a hollow ring shape, the clamping claw driving wire reel can be rotatably arranged in the first annular countersunk hole, an arc-shaped tooth groove is arranged on one end face of the moving block, a spiral groove is arranged on one end face of the clamping claw driving wire reel, and the spiral groove cooperates with the arc-shaped tooth grooves of na of the moving blocks for transmission, a non-through second sliding groove is arranged on the moving block, the adjusting slider can be slidably arranged in the second sliding groove, a threaded hole is arranged on the adjusting slider, the adjusting screw is threadedly connected to the adjusting slider, the adjusting screw is rotatably connected to the moving block, and the clamping claw is fixed on the adjusting slider.

[0006] The chuck body and the chuck mounting shaft of the clamping part are both hollow, have the same shape and are formed by overlapping and penetrating round and square holes, so that they can be compatible with round and square clamped objects to the greatest extent.

[0007] The transmission part includes a chuck mounting plate, a fixed gear ring, a gear ring movable sleeve, a gear ring pressure plate, a planet carrier, a first sun gear, a second sun gear, an input gear ring, and nb first planetary gears, nb first mounting columns, nb second planetary gears, nb second mounting columns, and two side fixing seats for fixing the chuck mounting plate;

[0008] The chuck mounting plate is fixedly connected with the fixed ring gear, the ring gear movable sleeve, and the ring gear pressure plate in sequence; the chuck mounting plate is coaxially rotatably arranged with the first sun gear, the planet carrier, and the second sun gear in sequence, and is located in a space formed between the chuck mounting plate and the ring gear pressure plate; nb first mounting columns are fixed on one side of the planet carrier, and nb second mounting columns are fixed on the other side; the first planetary gears are rotatably arranged on the nb first mounting columns, and the second planetary gears are rotatably arranged on the nb second mounting columns; and a first notch is arranged on the ring gear movable sleeve;

[0009] The input ring gear is rotatably arranged on the inner side of the ring gear movable sleeve, and meshes with the second planetary gear for transmission, the second planetary gear meshes with the second sun gear for transmission, the fixed ring gear meshes with the first planetary gear for transmission, the first planetary gear meshes with the first sun gear for transmission, the fixed ring gear has the same tooth modulus as the input ring gear, the first planetary gear has the same tooth modulus as the second planetary gear, the first sun gear has the same tooth modulus as the second sun gear, and nb is an integer greater than or equal to 2.

[0010] The clamping power source part includes a driving motor, a driving motor mounting plate, a driving gear, a driven gear, a driven gear mounting column, and a clamping power source shield. The driving motor is fixedly connected to the driving motor mounting plate, the driving gear is fixed to the output end of the driving motor, the driven gear mounting column is fixed to the driving motor mounting plate, the driven gear mounting column is rotatably connected to the driven gear, and the driven gear is meshed with the driving gear for transmission.

[0011] The driving motor mounting plate of the clamping power source part is fixedly connected to the chuck mounting plate of the transmission part, and the driven gear is meshed and transmitted with the input gear ring through the first notch.

[0012] The chuck mounting shaft is disposed through the transmission part and is rotatably connected to the chuck mounting plate, and the chuck mounting shaft is fixedly connected to the first sun gear, and the second sun gear is fixedly connected to the clamping jaw driving wire reel.

[0013] A laser chuck, which can be lengthened. A power extension shaft, a chuck body extension shaft, and an extension shield can be arranged between the clamping part and the transmission part to extend the clamping part. The power extension shaft is hollow, and the chuck body extension shaft is rotatably passed therein. The extension shield is sleeved on the outside of the power extension shaft. One end of the power extension shaft is fixedly connected to the clamping claw driving wire reel, and the other end is fixedly connected to the second sun gear. One end of the chuck body extension shaft is fixedly connected to the chuck mounting shaft, and the other end is fixedly connected to the chuck body. One end of the extension shield is fixedly connected to the chuck mounting plate.

[0014] A machine tool comprises a machine body and the above-mentioned laser chuck.

[0015] The utility model adopts a transmission part to output differential power and is externally arranged on the clamping part, and does not rotate with the clamping part. The clamping part is penetrated by the transmission part. After the power is output from the clamping power source part, it is transmitted to the moving block of the clamping part which can rotate relatively through the transmission part. At the same time, the position of the clamping claw is adjusted through the adjustment mechanism, so that the laser chuck can clamp and be suitable for different clamping object shapes. The power part is externally arranged on the outside of the chuck and does not rotate with the chuck. At the same time, the transmission part outputs differential power to the clamping part, thereby realizing the clamping effect. The spiral groove and the arc-shaped tooth groove of the moving block are matched for transmission, and the clamping stroke is greatly increased. The technical solution greatly reduces the cost, has a small size, a simple structure and a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 This is a stereogram of Example 1.

[0018] Figure 2 This is a cross-sectional view of Example 1.

[0019] Figure 3 This is a three-dimensional diagram of the clamping part of Example 1.

[0020] Figure 4 This is a cross-sectional view of the clamping portion of Example 1.

[0021] Figure 5 This is an exploded view of the clamping part of Example 1.

[0022] Figure 6 It is a three-dimensional diagram of the transmission part of Example 1.

[0023] Figure 7 This is a cross-sectional view of the transmission part of Example 1.

[0024] Figure 8 This is an exploded view of the transmission part of Example 1.

[0025] Fig. 9 This is a partial exploded view of the clamping power source of Example 1.

[0026] Fig.10 This is a cross-sectional view of an extended laser chuck of Example 2.

[0027] Fig.11 This is an exploded view of an extended laser chuck of Example 2. DETAILED DESCRIPTION

[0028] The following is a detailed description of the embodiments of the present invention, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer definition of the protection scope of the present invention. The accompanying drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementations and the advantages of the present invention.

[0029] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0030] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0032] Example 1

[0033] Refer to the attached Figure 1-9 A laser chuck comprises: a clamping part 01, a transmission part 02 and a clamping power source part 03 for providing clamping power for the clamping part, the transmission part 01 is hollow, the transmission part 02 is sequentially provided with two sets of planetary gear trains, the clamping part 01 can be rotatably penetrated on the transmission part 02, and can be led out from the other end thereof, the clamping part 01 is provided with a chuck body 1001, one end surface of the chuck body 1001 is provided with na first slide grooves A001, and the other end is provided with a first annular countersunk hole A002 connected with the first slide groove A001, each first A moving block 1005 is slidably arranged in the slide groove A001, an adjustment mechanism 001 is installed on each moving block 1005, a clamping claw 1006 is installed on each adjustment mechanism 001, and a clamping power source part 03 is installed on the outer side of the transmission part 02. When the power is output from the clamping power source part 03, the differential motion is output to the relatively rotatable clamping part 01 through the planetary gear system of the transmission part 02, so that the clamping part 01 can realize the independent movement of the moving block 1005 in any rotation speed state of rotation or stillness, and na is an integer greater than or equal to 2.

[0034] The clamping part 01 also includes a chuck mounting shaft 1002, a chuck driving tooth 1003, and a clamping claw driving wire reel 1004. Each adjustment mechanism includes: an adjustment slider 01001, an adjustment screw 01002, an end face of one side of the first annular countersunk hole A002 of the chuck body 1001 is fixedly connected to an end face of the chuck mounting shaft 1002, and a chuck driving tooth 1003 is fixed to the other end face of the chuck mounting shaft 1002 to connect an external power to drive the chuck body 1001 and the clamping claw 1006 thereon to rotate. The clamping claw driving wire reel 1004 is in the shape of a hollow ring, and the clamping claw driving wire reel 1004 can be rotatably set in the first annular countersunk hole A0 02, an arc-shaped tooth groove A003 is arranged on one end face of the moving block 1005, a spiral groove A004 is arranged on one end face of the clamping claw driving wire reel 1004, the spiral groove A004 cooperates with the arc-shaped tooth groove A003 of na moving blocks for transmission, a non-through second slide groove A005 is arranged on the moving block 1005, the adjusting slider 01001 can be slidably arranged in the second slide groove A005, a threaded hole is arranged on the adjusting slider 01001, the adjusting screw 01002 is threadedly connected with the adjusting slider 01001, the adjusting screw 01002 is rotatably connected with the moving block 1005, and the clamping claw 1006 is fixed on the adjusting slider 01001.

[0035] The chuck body 1001 and the chuck mounting shaft 1002 of the clamping part 01 are both hollow, have the same shape, and are formed by overlapping and penetrating round and square holes, so that they can be compatible with round and square clamped objects to the greatest extent.

[0036] The transmission part 02 includes a chuck mounting plate 2001, a fixed ring gear 2003, a ring gear movable sleeve 2004, a ring gear pressure plate 2005, a planet carrier 2008, a first sun gear 2009, a second sun gear 2013, an input ring gear 2012, nb first planetary gears 2006, nb first mounting columns 2007, nb second planetary gears 2010, nb second mounting columns 2011, and fixed seats 2002 on both sides of the fixed chuck mounting plate 2001;

[0037] The chuck mounting plate 2001 is fixedly connected with the fixed ring gear 2003, the ring gear movable sleeve 2004, and the ring gear pressure plate 2005 in sequence. The chuck mounting plate 2001 is coaxially rotatably arranged with the first sun gear 2009, the planet carrier 2008, and the second sun gear 2013 in sequence, and is located in the space formed between the chuck mounting plate 2001 and the ring gear pressure plate 2005. One side of the planet carrier 2008 is fixed with nb first mounting columns 2007, and the other side is fixed with nb second mounting columns 2011. The first planetary gears 2008 are rotatably arranged on the nb first mounting columns 2007, and the second planetary gears 2010 are rotatably arranged on the nb second mounting columns 2011. The ring gear movable sleeve 2004 is provided with a first notch B001.

[0038] The input ring gear 2012 is rotatably arranged on the inner side of the ring gear movable sleeve 2004, and meshes with the second planetary gear 2010 for transmission, the second planetary gear 2010 meshes with the second sun gear 2013 for transmission, the fixed ring gear 2003 meshes with the first planetary gear 2006 for transmission, the first planetary gear 2006 meshes with the first sun gear 2009 for transmission, the fixed ring gear 2003 and the input ring gear 2012 have the same tooth number module, the first planetary gear 2006 and the second planetary gear 2010 have the same tooth number module, the first sun gear 2009 and the second sun gear 2013 have the same tooth number module, and nb is an integer greater than or equal to 2.

[0039] The clamping power source 03 part includes a driving motor 3001, a driving motor mounting plate 3002, a driving gear 3003, a driven gear 3004, a driven gear mounting column 3005, and a clamping power source shield 3006. The driving motor 3001 is fixedly connected to the driving motor mounting plate 3002, a driving gear 3003 is fixed to the output end of the driving motor 3001, a driven gear mounting column 3005 is fixed to the driving motor mounting plate 3002, the driven gear mounting column 3005 is rotatably connected to the driven gear 3004, and the driven gear 3004 is meshed with the driving gear 3003 for transmission.

[0040] The driving motor mounting plate 3002 of the clamping power source part 03 is fixedly connected to the chuck mounting plate 2001 of the transmission part 02, and the driven gear 3004 is meshed with the input gear ring 2012 through the first notch B001 for transmission.

[0041] The chuck mounting shaft 1002 is disposed through the transmission part 02 and is rotatably connected to the chuck mounting plate 2001 , and the chuck mounting shaft 1002 is fixedly connected to the first sun gear 2009 , and the second sun gear 2013 is fixedly connected to the clamping claw driving wire reel 1004 .

[0042] Example 2

[0043] Refer to the attached Figure 10-11 , an extended laser chuck, a power extension shaft 4001, a chuck body extension shaft 4002, and an extension shield 4003 can be arranged between the clamping part 01 and the transmission part 02, which are used to extend the clamping part 01, the power extension shaft 4001 is hollow, and the chuck body extension shaft 4002 can be rotatably passed through it, the extension shield 4003 is sleeved on the outside of the power extension shaft 4001, one end of the power extension shaft 4001 is fixedly connected to the clamping claw driving wire disk 1004, and the other end is fixedly connected to the second sun gear 2013, one end of the chuck body extension shaft 4002 is fixedly connected to the chuck mounting shaft 1002, and the other end is fixedly connected to the chuck body 1001, and one end of the extension shield 4003 is fixed on the mounting plate 2001; this extended laser chuck lengthens the distance between the clamping part 01 and the transmission part 02, which can make the clamping part 01 have more operating space, and can be used as a tail feeding chuck or other special occasions.

[0044] A machine tool comprises a machine body and the above-mentioned laser chuck.

[0045] Working principle: The transmission part outputs differential power and is placed outside the clamping part. It does not rotate with the clamping part. The clamping part is inserted into the transmission part and can be drawn out from the other end. After the power is output from the clamping power source part, it is transmitted to the clamping claw of the relatively rotatable clamping part through the planetary gear system of the transmission part. At the same time, the clamping claw is adjusted and clamped by the adjustment mechanism so that the laser chuck can clamp and adapt to different clamping shapes. The transmission part is equipped with two sets of identical planetary gear systems in sequence. The planetary gear systems share a planetary carrier, fix one gear ring, and use the other gear ring as a power input to realize the stationary The movement of the state is independently transmitted to the moving or stationary object, and the spiral groove of the wire disc driven by the clamping claw cooperates with the arc-shaped tooth groove of the moving block for transmission, so as to realize the conversion of rotational motion into linear motion of the moving block. An adjustment mechanism is installed on the moving block to realize the position adjustment of the clamping claw on the adjustment mechanism, and the power part is placed outside the chuck and does not rotate with the chuck. At the same time, the transmission part outputs differential power to the clamping part, so as to realize the clamping effect. The spiral groove and the arc-shaped tooth groove of the moving block are used to cooperate for transmission, and the clamping stroke is greatly increased. The technical solutions such as the above greatly reduce the cost, have a small size, a simple structure and a long service life.

[0046] The above embodiments and drawings can be extended to other technical fields. The above embodiments and drawings do not limit the product form and style of the utility model. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the utility model.

Claims

1. A laser chuck, characterized in that: include: A clamping part, a transmission part and a clamping power source part for providing clamping power for the clamping part, the transmission part is hollow, and the transmission part is sequentially provided with two groups of identical planetary gear trains, the clamping part can be rotatably penetrated on the transmission part, and can be led out from the other end thereof, the clamping part is provided with a chuck body, one end face of the chuck body is provided with na first slide grooves, and the other end is provided with a first annular countersunk hole connected with the first slide groove, a moving block can be slidably provided in each of the first slide grooves, an adjustment mechanism is installed on each of the moving blocks, and a clamping claw is installed on each of the adjustment mechanisms, and the clamping power source part is installed on the outside of the transmission part, when the power is output from the clamping power source part, the differential motion is output through the planetary gear train of the transmission part to the clamping part which can rotate relatively, so that the clamping part can realize the independent movement of the moving block in any rotation speed state of rotation or stillness, and at the same time, the position of the clamping claw is adjusted by the adjustment mechanism, and na is an integer greater than or equal to 2.

2. A laser chuck according to claim 1, characterized in that: The clamping part also includes a chuck mounting shaft, a chuck driving tooth, and a clamping claw driving a wire reel, each of the adjustment mechanisms includes: an adjusting slider, an adjusting screw, an end face of one side of the first annular countersunk hole of the chuck main body is fixedly connected to an end face of the chuck mounting shaft, and the chuck driving tooth is fixed to the other end face of the chuck mounting shaft, so as to connect an external power to drive the chuck main body and the clamping claw thereon to rotate, the clamping claw driving wire reel is a hollow ring shape, the clamping claw driving wire reel can be rotatably arranged in the first annular countersunk hole, an arc-shaped tooth groove is arranged on one end face of the moving block, a spiral groove is arranged on one end face of the clamping claw driving wire reel, and the spiral groove cooperates with the arc-shaped tooth grooves of na of the moving blocks for transmission, a non-through second sliding groove is arranged on the moving block, the adjusting slider can be slidably arranged in the second sliding groove, a threaded hole is arranged on the adjusting slider, the adjusting screw is threadedly connected to the adjusting slider, the adjusting screw is rotatably connected to the moving block, and the clamping claw is fixed on the adjusting slider.

3. A laser chuck according to claim 2, characterized in that: The chuck body and the chuck mounting shaft of the clamping part are both hollow, have the same shape and are formed by overlapping and penetrating round and square holes, so that they can be compatible with round and square clamped objects to the greatest extent.

4. A laser chuck according to claim 3, characterized in that: The transmission part includes a chuck mounting plate, a fixed gear ring, a gear ring movable sleeve, a gear ring pressure plate, a planet carrier, a first sun gear, a second sun gear, an input gear ring, and nb first planetary gears, nb first mounting columns, nb second planetary gears, nb second mounting columns, and two side fixing seats for fixing the chuck mounting plate; The chuck mounting plate is fixedly connected with the fixed ring gear, the ring gear movable sleeve, and the ring gear pressure plate in sequence; the chuck mounting plate is coaxially rotatably arranged with the first sun gear, the planet carrier, and the second sun gear in sequence, and is located in a space formed between the chuck mounting plate and the ring gear pressure plate; nb first mounting columns are fixed on one side of the planet carrier, and nb second mounting columns are fixed on the other side; the first planetary gears are rotatably arranged on the nb first mounting columns, and the second planetary gears are rotatably arranged on the nb second mounting columns; and a first notch is arranged on the ring gear movable sleeve; The input ring gear is rotatably arranged on the inner side of the ring gear movable sleeve, and meshes with the second planetary gear for transmission, the second planetary gear meshes with the second sun gear for transmission, the fixed ring gear meshes with the first planetary gear for transmission, the first planetary gear meshes with the first sun gear for transmission, the fixed ring gear has the same tooth modulus as the input ring gear, the first planetary gear has the same tooth modulus as the second planetary gear, the first sun gear has the same tooth modulus as the second sun gear, and nb is an integer greater than or equal to 2.

5. A laser chuck according to claim 4, characterized in that: The clamping power source part includes a driving motor, a driving motor mounting plate, a driving gear, a driven gear, a driven gear mounting column, and a clamping power source shield. The driving motor is fixedly connected to the driving motor mounting plate, the driving gear is fixed to the output end of the driving motor, the driven gear mounting column is fixed to the driving motor mounting plate, the driven gear mounting column is rotatably connected to the driven gear, and the driven gear is meshed with the driving gear for transmission.

6. A laser chuck according to claim 5, characterized in that: The driving motor mounting plate of the clamping power source part is fixedly connected to the chuck mounting plate of the transmission part, and the driven gear is meshed and transmitted with the input gear ring through the first notch.

7. A laser chuck according to claim 6, characterized in that: The chuck mounting shaft is disposed through the transmission part and is rotatably connected to the chuck mounting plate, and the chuck mounting shaft is fixedly connected to the first sun gear, and the second sun gear is fixedly connected to the clamping jaw driving wire reel.

8. A laser chuck according to claim 7, characterized in that: The laser chuck can be lengthened, and a power extension shaft, a chuck body extension shaft, and an extension shield can be arranged between the clamping part and the transmission part to extend the clamping part. The power extension shaft is hollow, and the chuck body extension shaft is rotatably passed through it. The extension shield is sleeved on the outside of the power extension shaft. One end of the power extension shaft is fixedly connected to the clamping claw driving wire reel, and the other end is fixedly connected to the second sun gear. One end of the chuck body extension shaft is fixedly connected to the chuck mounting shaft, and the other end is fixedly connected to the chuck body. One end of the extension shield is fixedly connected to the chuck mounting plate.

9. A machine tool, characterized in that: The invention comprises a body and a laser chuck as claimed in any one of claims 1 to 8.

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