External differential power chuck and machine tool

Abstract

The utility model discloses an external differential power chuck and a machine tool. The external differential power chuck comprises a chuck assembly, a differential power input assembly and n moving claws, wherein the differential power input assembly is arranged on the outer side of the chuck assembly and fixedly connected with the chuck assembly; the chuck assembly is coaxially provided with a main rotary power input gear and a differential input gear, and the differential power input assembly is provided with a rotary driven gear and a differential output gear which are coaxial and can rotate relatively; the utility model has the beneficial effects that the differential power input component is used for outputting the rotation motion of the differential output gear relative to the rotary driven gear, so that the relative motion of the differential input gear relative to the main rotary power input gear is realized, and the relative displacement between the moving claws is realized; according to the technical scheme, the external differential power chuck can clamp and is suitable for different shapes of clamped objects, 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 an external differential power 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 an external differential power 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 an external differential power chuck, comprising: a chuck assembly, a differential power input assembly arranged on the outside of the chuck assembly and fixedly connected thereto; the chuck assembly is coaxially provided with a main rotating power input gear and a differential input gear, the differential input gear can rotate relative to the main rotating power input gear, the chuck assembly is provided with n moving claws for clamping a workpiece, the differential power input assembly is provided with a coaxial rotating driven gear and a differential output gear that can rotate relative to each other, the differential output gear is meshed with the differential input gear for transmission, the main rotating power input gear is meshed with the rotating driven gear for transmission, the differential power input assembly is used to output the rotational movement of the differential output gear relative to the rotating driven gear, thereby realizing the relative movement of the differential input gear relative to the main rotating power input gear, thereby realizing the relative displacement between the moving claws.

[0005] Preferably, the chuck assembly further comprises a chuck mounting seat, a chuck mounting plate, a chuck mounting shaft, a clamping claw driving wire reel, a chuck body, n moving blocks, a first bearing, a clamping adjustment mechanism, a rotating motor, a rotating motor mounting plate, a rotating driving gear, and a shield;

[0006] The chuck mounting seat is fixedly connected to the chuck mounting plate, the chuck mounting shaft is rotatably connected to the chuck mounting plate, one end face of the chuck mounting shaft is fixedly connected to the chuck body, one end face of the chuck body is fixedly connected to the chuck body, one end face of one side of the chuck body is provided with n first sliding grooves, and the other end is provided with a first annular countersunk hole connected to the first sliding groove, each of the first sliding grooves is slidably provided with a moving block, each of the moving blocks is installed with the adjusting mechanism, and each of the adjusting mechanisms is installed with the moving claw, each of the adjusting mechanisms comprises: an adjusting slider, an adjusting screw threadedly connected to the adjusting slider, the main rotating power input gear is fixed on the chuck mounting shaft, the differential input gear is rotatably connected to the chuck mounting shaft, and the clamping claw driving wire disc is rotatably arranged in the first annular countersunk hole and connected to the The differential input gear is fixedly connected, an arc-shaped tooth groove is provided on one end face of the moving block, and a spiral groove is provided on one end face of the clamping claw driving wire disk, and the spiral groove cooperates with the arc-shaped tooth grooves of n moving blocks for transmission, and a non-through second slide groove is provided on the moving block, and the adjustment slider can be slidably set in the second slide groove, and a first bearing is fixed in the middle of each arc-shaped tooth groove on each moving block, and the first bearing can cooperate with the spiral groove for transmission, the rotating motor is fixedly connected to the rotating motor mounting plate, and the rotating motor mounting plate is fixedly connected to the chuck mounting plate, and the rotating drive gear is fixed at the output end of the rotating motor, and the chuck mounting plate is also fixed with a shield, and the main rotating power input gear and the differential input gear have the same tooth number module, and n is an integer greater than 2.

[0007] Preferably, the differential power input assembly further includes a first sun gear shaft, a second sun gear shaft, a differential upper mounting, a first upper gear ring, a differential lower mounting plate, m first upper planetary gears, a first common planet carrier, m first lower planetary gears, a first lower gear ring, and a first differential motor;

[0008] The first sun gear shaft is hollow, in which the second sun gear shaft is rotatably arranged, one end of the first sun gear shaft is fixedly connected to the rotating driven gear, one end of the second sun gear shaft is fixedly connected to the differential output gear, the differential upper mounting is hollow, in which the first sun gear shaft is rotatably penetrated, the differential upper mounting is fixedly connected to one end of the first upper gear ring, the other end of the first upper gear ring is fixedly connected to the differential lower mounting plate, the first upper gear ring is hollow, in which a rotating driven gear, a differential output gear, a first sun gear shaft, a second sun gear shaft, m first upper planetary gears, a first common planetary carrier, m first lower planetary gears, and a first lower gear ring are arranged, and transmission teeth are arranged inside the first upper gear ring and connected to the m first upper gear rings. Planetary gear meshing transmission, the m first upper planetary gears are all rotatably set on one side of the first common planetary carrier, and mesh with the first sun gear shaft for transmission, the m first lower planetary gears are all rotatably set on the other side of the first common planetary carrier, and mesh with the first lower gear ring for transmission, the first lower gear ring is rotatably connected to the first upper gear ring, the first differential motor is fixedly connected to the differential lower mounting plate, the output end of the first differential motor is fixedly connected to the first lower gear ring, the m first upper planetary gears have the same tooth modulus as the m first lower planetary gears, the first upper gear ring has the same tooth modulus as the first lower gear ring, the first sun gear shaft has the same tooth modulus as the second sun gear shaft, and m is an integer greater than 2.

[0009] Preferably, 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.

[0010] Preferably, the differential power input assembly includes a second differential mounting upper plate, a second differential mounting ring of a hollow opening structure, a second differential mounting lower plate, a second rotating driven gear ring disposed in the hollow opening structure of the second differential mounting ring, a second differential output gear ring, k second upper planetary gears, a second common planet carrier, k second lower planetary gears, a second upper sun gear, a second lower sun gear, and a second differential motor;

[0011] One end of the second differential mounting ring is fixedly connected to the second differential mounting upper plate, and the other end is fixedly connected to the second differential mounting lower plate, the second rotating driven gear ring is rotatably connected to the second differential mounting upper plate, the second differential output gear ring is rotatably connected to the second differential mounting lower plate, the second rotating driven gear ring and the second differential output gear ring have opposite gear teeth and are coaxially rotatably arranged, the inner side of the second rotating driven gear ring is meshed with the k second lower planetary gears, the k second upper planetary gears have the same tooth number and module as the k second lower planetary gears, are coaxial and rotatably connected to the second common planet carrier, the inner side of the second differential output gear ring is meshed with the k second upper planetary gears, and the k second upper planetary gears are all meshed with the k second upper planetary gears. The two upper sun gears are meshed for transmission, the second upper sun gear is fixedly connected to the second differential mounting upper plate, the k second lower planetary gears are all meshed for transmission with the second lower sun gear, the second lower sun gear is rotatably connected to the second differential mounting lower plate, the second differential motor is fixedly connected to the second differential mounting lower plate, the output end of the second differential motor is fixedly connected to the second lower sun gear, the second upper sun gear has the same module and number of teeth as the second lower sun gear, the second rotating driven gear ring has the same module and number of teeth as the second differential output gear ring, and the outer side of the second rotating driven gear ring is provided with transmission teeth and meshes with the main rotating power input gear for transmission, the outer side of the two differential output gear rings is provided with transmission teeth and meshes with the differential input gear for transmission, and k is an integer greater than or equal to 2.

[0012] Preferably, the second rotating driven ring gear is meshed with the main rotating power input gear for transmission, the second differential output ring gear is meshed with the differential input gear for transmission, and the second differential mounting lower plate is fixedly connected to the chuck mounting plate.

[0013] Preferably, the external differential power chuck can be lengthened, and a power extension shaft, a chuck body extension shaft, and an extension shield are arranged between the differential input gear of the chuck assembly and the clamping jaw driven wire reel. 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 jaw driven wire reel, and the other end is fixedly connected to the differential input 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 main body, and one end of the extension shield is fixed to the shield.

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

[0015] The utility model adopts a differential power input assembly arranged on the outer side of the chuck assembly, the differential power input assembly is used to output differential power to the chuck assembly, the main rotating power input gear and the differential input gear of the chuck assembly are used to receive the differential power input by the differential power input assembly, thereby realizing the relative movement of the differential input gear and the main rotating power input gear, thereby realizing the relative displacement between the moving claws on the chuck assembly, when the power is output from the differential power input assembly, it is transmitted to the moving block of the chuck assembly through the differential input gear, and the position of the clamping claw is adjusted by the adjustment mechanism, so that the laser chuck can be clamped and adjusted to different clamping object shapes, and the spiral groove and the arc tooth groove of the moving block and the bearing are matched for transmission, while the clamping stroke is greatly increased and the friction is reduced, etc. 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 4 is a cross-sectional view of the chuck assembly of Example 1.

[0020] Figure 4 It is a stereoscopic view of the differential power input assembly of Example 1.

[0021] Figure 5 It is a cross-sectional view of the differential power input assembly of Example 1.

[0022] Figure 6 This is an exploded view of the differential power input assembly of Example 1.

[0023] Figure 7 A stereoscopic view of a differential power input assembly with a ring gear output according to Example 1.

[0024] Figure 8 A cross-sectional view of a differential power input assembly with a ring gear output according to Example 1.

[0025] Fig. 9 An exploded view of a differential power input assembly with a ring gear output according to Example 1.

[0026] Fig.10 This is a cross-sectional view of an extendable external differential power chuck of Example 1.

[0027] Fig.11 This is an exploded view of an extendable external differential power chuck of Example 1. 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] See attached Figure 1-8An external differential power chuck comprises: a chuck assembly 01, a differential power input assembly 02 arranged outside the chuck assembly 01 and fixedly connected thereto; the chuck assembly 01 is coaxially provided with a main rotating power input gear 1001 and a differential input gear 1002, the differential input gear 1002 can rotate relative to the main rotating power input gear 1002, the chuck assembly 01 is provided with n movable claws 1003 for clamping a workpiece, and the differential power input assembly 02 is provided with a coaxial rotating driven gear that can rotate relatively 2001 and the differential output gear 2002, the differential output gear 2002 is meshed with the differential input gear 1002 for transmission, the main rotating power input gear 1001 is meshed with the rotating driven gear 2001 for transmission, the differential power input assembly 02 is used to output the rotational movement of the differential output gear 2002 relative to the rotating driven gear 2001, thereby realizing the relative movement of the differential input gear 1002 relative to the main rotating power input gear 1001, thereby realizing the relative displacement between the moving claws 1003.

[0034] The chuck assembly 01 further includes a chuck mounting seat 1004, a chuck mounting plate 1005, a chuck mounting shaft 1006, a clamping claw driving wire reel 1007, a chuck body 1008, n moving blocks 1009, a first bearing 1010, a clamping adjustment mechanism 1011, a rotating motor 1012, a rotating motor mounting plate 1013, a rotating driving gear 1014, and a shield 1015;

[0035] The chuck mounting seat 1004 is fixedly connected to the chuck mounting plate 1005, the chuck mounting shaft 1006 is rotatably connected to the chuck mounting plate 1005, one end face of the chuck mounting shaft 1006 is fixedly connected to the chuck body 1008, one end face of the chuck body 1008 is provided with n first slide grooves A001, and the other end is provided with a first annular countersunk hole A002 spatially connected to the first slide groove A001, each first slide groove A001 is slidably provided with a moving block 1009, and each moving block 100 9 is equipped with an adjustment mechanism 1011, each adjustment mechanism 1011 is equipped with a moving claw 1003, each adjustment mechanism 1011 includes: an adjustment slider 01001, an adjustment screw 01002 threadedly connected to the adjustment slider 01001, a main rotating power input gear 1001 is fixed on the chuck mounting shaft 1006, the differential input gear 1002 is rotatably connected to the chuck mounting shaft 1006, and the clamping claw driving wire disk 1007 is rotatably arranged in the first annular counterbore A002 and connected to the differential The input gear 1002 is fixedly connected, an arc-shaped tooth groove A003 is provided on one end face of the moving block 1009, a spiral groove A004 is provided on one end face of the clamping claw driving wire disc 1007, and the spiral groove A004 cooperates with the arc-shaped tooth grooves A003 of the n moving blocks 1009 for transmission, and a non-through second slide groove A005 is provided on the moving block 1009, and the adjustment slider 01001 can be slidably set in the second slide groove A005, and a fixed one is fixed in the middle of each arc-shaped tooth groove A003 on each moving block 1009. The first bearing 1010 can cooperate with the spiral groove A004 for transmission, the rotating motor 1012 is fixedly connected to the rotating motor mounting plate 1013, the rotating motor mounting plate 1013 is fixedly connected to the chuck mounting plate 1005, a rotating driving gear 1014 is fixed to the output end of the rotating motor 1012, and a shield 1015 is also fixed to the chuck mounting plate 1005, the main rotating power input gear 1001 and the differential input gear 1002 have the same tooth number and module, and n is an integer greater than 2.

[0036] The differential power input assembly 02 further includes a first sun gear shaft 2003, a second sun gear shaft 2004, a differential upper mounting 2005, a first upper gear ring 2006, a differential lower mounting plate 2007, m first upper planetary gears 2008, a first common planet carrier 2009, m first lower planetary gears 2010, a first lower gear ring 2011, and a first differential motor 2012;

[0037] The first sun gear shaft 2003 is hollow, and the second sun gear shaft 2004 is rotatably arranged therein. One end of the first sun gear shaft 2003 is fixedly connected to the rotating driven gear 2001, and one end of the second sun gear shaft 2004 is fixedly connected to the differential output gear 2002. The differential upper mounting 2005 is hollow, and the first sun gear shaft 2003 is rotatably passed therein. The differential upper mounting 2005 is fixedly connected to one end of the first upper gear ring 2006, and the other end of the first upper gear ring 2006 is fixedly connected to the differential lower mounting plate 2007. The first upper gear ring 2006 is hollow, and the rotating driven gear 2001, the differential output gear 2002, the first sun gear shaft 2003, the second sun gear shaft 2004, m first upper planetary gears 2008, the first common planet carrier 2009, m first lower planetary gears 2010, and the first lower gear ring 2011 are arranged therein. The first planetary gears 2008 have transmission teeth and mesh with the m first upper planetary gears 2008 for transmission. The m first upper planetary gears 2008 can be rotatably arranged on one side of the first common planetary carrier 2009 and mesh with the first sun gear shaft 2003 for transmission. The m first lower planetary gears 2010 can be rotatably arranged on the other side of the first common planetary carrier 2009 and mesh with the first lower gear ring 2011 for transmission. The first lower gear ring 2011 is rotatably connected to the first upper gear ring 2006. The first differential motor 2012 is fixedly connected to the differential lower mounting plate 2007. The output end of the first differential motor 2012 is fixedly connected to the first lower gear ring 2011. The m first upper planetary gears 2008 have the same tooth modulus as the m first lower planetary gears 2010. The first upper gear ring 2006 has the same tooth modulus as the first lower gear ring 2011. The first sun gear shaft 2003 has the same tooth modulus as the second sun gear shaft 2004. m is an integer greater than 2.

[0038] Refer to the attached Figure 7-9 An external differential power chuck includes a differential power input assembly 03 with a gear ring output, wherein the differential power input assembly 03 includes a second differential mounting upper plate 3001, a second differential mounting ring 3002 with a hollow opening structure, a second differential mounting lower plate 3003, a second rotating driven gear ring 3004 arranged in the hollow opening structure of the second differential mounting ring 3002, a second differential output gear ring 3005, k second upper planetary gears 3006, a second common planet carrier 3007, k second lower planetary gears 3008, a second upper sun gear 3009, a second lower sun gear 3010, and a second differential motor 3011;

[0039] One end of the second differential mounting ring 3002 is fixedly connected to the second differential mounting upper plate 3001, and the other end is fixedly connected to the second differential mounting lower plate 3003. The second rotating driven gear ring 3004 is rotatably connected to the second differential mounting upper plate 3001, and the second differential output gear ring 3005 is rotatably connected to the second differential mounting lower plate 3003. The second rotating driven gear ring 3004 and the second differential output gear ring 3005 have opposite gear teeth and are coaxially rotatably arranged. The k second lower planetary gears 3008 are meshed and driven on the inner side of the second differential output ring gear 3005, the k second upper planetary gears 3006 are equal in number of teeth and modulus to the k second lower planetary gears 3008, are coaxial and rotatably connected to the second common planet carrier 3007, the k second upper planetary gears 3006 are meshed and driven on the inner side of the second differential output ring gear 3005, the k second upper planetary gears 3006 are meshed and driven on the second upper sun gear 3009, and the second upper sun gear 3009 is fixedly connected to the second differential mounting upper plate 3001. Then, the k second lower planetary gears 3008 are meshed with the second lower sun gear 3010 for transmission, the second lower sun gear 3010 is rotatably connected to the second differential mounting lower plate 3003, the second differential motor 3011 is fixedly connected to the second differential mounting lower plate 3003, the output end of the second differential motor 3011 is fixedly connected to the second lower sun gear 3010, the second upper sun gear 3009 and the second lower sun gear 3010 have the same modulus teeth, the second rotating driven gear ring 3004 is connected to the second differential output gear The number of teeth on the ring 3005 is equal to the module, and the outer side of the second rotating driven ring gear 3004 is provided with transmission teeth and meshes with the main rotating power input gear 1001 for transmission, and the outer side of the second differential output ring gear 3005 is provided with transmission teeth and meshes with the differential input gear 1002 for transmission, k is an integer greater than or equal to 2, and the differential power input component 03 of this ring gear output adopts a common planetary carrier, fixes a sun gear, and uses the ring gear as the output, thereby forming a deceleration torque increase in the differential power input component 03, and has a smaller volume.

[0040] Among them, the second rotation driven ring gear 3004 is meshed with the main rotation power input gear 1001 for transmission, the second differential output ring gear 3005 is meshed with the differential input gear 1002 for transmission, and the second differential mounting lower plate 3003 is fixedly connected to the chuck mounting plate 1005.

[0041] Among them, the chuck body 1008 of the clamping part and the chuck installation shaft 1006 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.

[0042] Example 2

[0043] Refer to the attached Figure 10-11A kind of extendable external differential power chuck, a power extension shaft 4001, a chuck body extension shaft 4002, and an extension shield 4003 can be arranged between the differential input gear 1002 of the chuck assembly 01 and the clamping claw drive wire disk 1007, the power extension shaft 4001 is hollow, and the chuck body extension shaft 4002 can be rotatably penetrated therein, the extension shield 4003 is sleeved on the outside of the power extension shaft 4001, and one end of the power extension shaft 4001 is fixedly connected to the clamping claw drive wire disk 1007 , and the other end is fixedly connected to the differential input gear 1002, one end of the chuck body extension shaft 4002 is fixedly connected to the chuck mounting shaft 1006, and the other end is fixedly connected to the chuck body 1008, and one end of the extension shield 4003 is fixed on the shield 1015; this addition can lengthen the length of the external differential power chuck plus chuck assembly 01, so that the front end of the chuck assembly 01 has more operating space and avoids interference with the outside world at the front end of the chuck assembly 01, 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 external differential power chuck.

[0045] Working principle: A differential power input assembly is arranged outside the chuck assembly, and the differential power input assembly is used to output differential power to the chuck assembly. The main rotating power input gear and the differential input gear of the chuck assembly are used to receive the differential power input by the differential power input assembly, thereby realizing the relative movement of the differential input gear and the main rotating power input gear. The differential power input assembly of the first embodiment sequentially arranges two sets of identical planetary gear trains, and the planetary gear trains share a planetary carrier, and a gear ring is fixed, and the other gear ring is used as a power input method to realize the independent transmission of the motion in a stationary state to a moving or stationary object. The differential power input assembly of the second embodiment sequentially arranges two sets of identical planetary gear trains, and the planetary gear trains share a planetary carrier, and a sun gear is fixed, and the other sun gear is used as a power input method to realize the independent transmission of the motion in a stationary state to a moving or stationary object.

[0046] Thereby, relative displacement between the moving claws on the chuck assembly is realized. When power is output from the differential power input assembly, it is transmitted to the moving block of the chuck assembly through the differential input gear. The spiral groove of the wire disk 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. The spiral groove, the arc-shaped tooth groove of the moving block and the bearing are used for transmission. At the same time, the clamping stroke is greatly increased and the friction is reduced. Such technical solutions greatly reduce the cost, have a small size, a simple structure and a long service life.

[0047] 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. An external differential power chuck, characterized in that: include: A chuck assembly, a differential power input assembly arranged on the outside of the chuck assembly and fixedly connected thereto; the chuck assembly is coaxially provided with a main rotary power input gear and a differential input gear, the differential input gear can rotate relative to the main rotary power input gear, the chuck assembly is provided with n movable claws for clamping a workpiece, the differential power input assembly is provided with a coaxial relatively rotatable rotating driven gear and a differential output gear, the differential output gear is meshed with the differential input gear for transmission, the main rotary power input gear is meshed with the rotary driven gear for transmission, the differential power input assembly is used to output the rotational movement of the differential output gear relative to the rotary driven gear, thereby realizing the relative movement of the differential input gear relative to the main rotary power input gear, thereby realizing the relative displacement between the movable claws.

2. The external differential power chuck according to claim 1, characterized in that: The chuck assembly also includes a chuck mounting seat, a chuck mounting plate, a chuck mounting shaft, a clamping claw driving wire disk, a chuck body, n moving blocks, a first bearing, a clamping adjustment mechanism, a rotating motor, a rotating motor mounting plate, a rotating driving gear, and a shield; The chuck mounting seat is fixedly connected to the chuck mounting plate, the chuck mounting shaft is rotatably connected to the chuck mounting plate, one end face of the chuck mounting shaft is fixedly connected to the chuck body, one end face of the chuck body is fixedly connected to the chuck body, one end face of one side of the chuck body is provided with n first sliding grooves, and the other end is provided with a first annular countersunk hole connected to the first sliding groove, each of the first sliding grooves is slidably provided with a moving block, each of the moving blocks is installed with the adjusting mechanism, and each of the adjusting mechanisms is installed with the moving claw, each of the adjusting mechanisms comprises: an adjusting slider, an adjusting screw threadedly connected to the adjusting slider, the main rotating power input gear is fixed on the chuck mounting shaft, the differential input gear is rotatably connected to the chuck mounting shaft, and the clamping claw driving wire disc is rotatably arranged in the first annular countersunk hole and connected to the The differential input gear is fixedly connected, an arc-shaped tooth groove is provided on one end face of the moving block, and a spiral groove is provided on one end face of the clamping claw driving wire disk, and the spiral groove cooperates with the arc-shaped tooth grooves of n moving blocks for transmission, and a non-through second slide groove is provided on the moving block, and the adjustment slider can be slidably set in the second slide groove, and a first bearing is fixed in the middle of each arc-shaped tooth groove on each moving block, and the first bearing can cooperate with the spiral groove for transmission, the rotating motor is fixedly connected to the rotating motor mounting plate, and the rotating motor mounting plate is fixedly connected to the chuck mounting plate, and the rotating drive gear is fixed at the output end of the rotating motor, and the chuck mounting plate is also fixed with a shield, and the main rotating power input gear and the differential input gear have the same tooth number module, and n is an integer greater than 2.

3. The external differential power chuck according to claim 2, characterized in that: The differential power input assembly also includes a first sun gear shaft, a second sun gear shaft, a differential upper mounting, a first upper ring gear, a differential lower mounting plate, m first upper planetary gears, a first common planet carrier, m first lower planetary gears, a first lower ring gear, and a first differential motor; The first sun gear shaft is hollow, in which the second sun gear shaft is rotatably arranged, one end of the first sun gear shaft is fixedly connected to the rotating driven gear, one end of the second sun gear shaft is fixedly connected to the differential output gear, the differential upper mounting is hollow, in which the first sun gear shaft is rotatably penetrated, the differential upper mounting is fixedly connected to one end of the first upper gear ring, the other end of the first upper gear ring is fixedly connected to the differential lower mounting plate, the first upper gear ring is hollow, in which a rotating driven gear, a differential output gear, a first sun gear shaft, a second sun gear shaft, m first upper planetary gears, a first common planetary carrier, m first lower planetary gears, and a first lower gear ring are arranged, and transmission teeth are arranged inside the first upper gear ring and connected to the m first upper gear rings. Planetary gear meshing transmission, the m first upper planetary gears are all rotatably set on one side of the first common planetary carrier, and mesh with the first sun gear shaft for transmission, the m first lower planetary gears are all rotatably set on the other side of the first common planetary carrier, and mesh with the first lower gear ring for transmission, the first lower gear ring is rotatably connected to the first upper gear ring, the first differential motor is fixedly connected to the differential lower mounting plate, the output end of the first differential motor is fixedly connected to the first lower gear ring, the m first upper planetary gears have the same tooth modulus as the m first lower planetary gears, the first upper gear ring has the same tooth modulus as the first lower gear ring, the first sun gear shaft has the same tooth modulus as the second sun gear shaft, and m is an integer greater than 2.

4. The external differential power chuck according to claim 3, 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.

5. The external differential power chuck according to claim 4, characterized in that: The differential power input assembly includes a second differential mounting upper plate, a second differential mounting ring of a hollow opening structure, a second differential mounting lower plate, a second rotating driven gear ring disposed in the hollow opening structure of the second differential mounting ring, a second differential output gear ring, k second upper planetary gears, a second common planet carrier, k second lower planetary gears, a second upper sun gear, a second lower sun gear, and a second differential motor; One end of the second differential mounting ring is fixedly connected to the second differential mounting upper plate, and the other end is fixedly connected to the second differential mounting lower plate, the second rotating driven gear ring is rotatably connected to the second differential mounting upper plate, the second differential output gear ring is rotatably connected to the second differential mounting lower plate, the second rotating driven gear ring and the second differential output gear ring have opposite gear teeth and are coaxially rotatably arranged, the inner side of the second rotating driven gear ring is meshed with the k second lower planetary gears, the k second upper planetary gears have the same tooth number and module as the k second lower planetary gears, are coaxial and rotatably connected to the second common planet carrier, the inner side of the second differential output gear ring is meshed with the k second upper planetary gears, and the k second upper planetary gears are all meshed with the k second upper planetary gears. The two upper sun gears are meshed for transmission, the second upper sun gear is fixedly connected to the second differential mounting upper plate, the k second lower planetary gears are all meshed for transmission with the second lower sun gear, the second lower sun gear is rotatably connected to the second differential mounting lower plate, the second differential motor is fixedly connected to the second differential mounting lower plate, the output end of the second differential motor is fixedly connected to the second lower sun gear, the second upper sun gear has the same module and number of teeth as the second lower sun gear, the second rotating driven gear ring has the same module and number of teeth as the second differential output gear ring, and the outer side of the second rotating driven gear ring is provided with transmission teeth and meshes with the main rotating power input gear for transmission, the outer side of the two differential output gear rings is provided with transmission teeth and meshes with the differential input gear for transmission, and k is an integer greater than or equal to 2.

6. The external differential power chuck according to claim 5, characterized in that: The second rotation driven ring gear is meshed with the main rotation power input gear for transmission, the second differential output ring gear is meshed with the differential input gear for transmission, and the second differential mounting lower plate is fixedly connected to the chuck mounting plate.

7. The external differential power chuck according to claim 6, characterized in that: The external differential power chuck can be lengthened, and a power extension shaft, a chuck main body extension shaft, and an extension shield are arranged between the differential input gear of the chuck assembly and the clamping claw driven wire reel. The power extension shaft is hollow, and the chuck main 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 driven wire reel, and the other end is fixedly connected to the differential input gear, one end of the chuck main body extension shaft is fixedly connected to the chuck mounting shaft, and the other end is fixedly connected to the chuck main body, and one end of the extension shield is fixed to the shield.

8. A machine tool, characterized in that: It comprises a fuselage body and an external differential power chuck as described in any one of claims 1 to 7.

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