CN115026357A - Clamp for machining precise threaded copper pipe - Google Patents

Abstract

The invention provides a clamp for processing a precise threaded copper pipe, which comprises a rotary table assembly, an outer coupling clamp assembly, an inner coupling clamp assembly and an inner coupling adjusting assembly, wherein the rotary table assembly is coaxially connected with a rotation center of a thread processing machine tool; meanwhile, the linkage adjustment of the clamping neutral gear of copper pipes with different wall thicknesses can be realized through the matching of the internal connection adjustment assembly and the linkage gear capable of automatically lifting and moving, and the application range is wide.

Description

Clamp for machining precise threaded copper pipe

Technical Field

The invention relates to the technical field of ultra-precision copper pipe machining devices, in particular to a clamp for machining a precision threaded copper pipe.

Background

Copper pipes are commonly used for tap water pipelines, heat supply pipelines and refrigeration pipelines, have the advantages of hard texture, corrosion resistance, high temperature resistance, high pressure resistance and the like as installation pipes, and can be used in different environments; the precise copper pipes with different specifications for the air conditioning equipment for cold and heat exchange need precise threaded connection at the switching part.

In the accurate copper pipe's of idle call thread machining technology, because accurate copper pipe has the comparatively thin characteristics of wall thickness, and the outer wall or the inner wall of common machine tool three-jaw formula clamping device only can the independent clamping copper pipe, at the in-process of clamping, cause the deformation of copper pipe very easily, lead to thread machining's precision to descend.

In order to solve the problems, generally, before the thread of the copper pipe is processed, an operator firstly plugs a solid rod into an inner hole of the copper pipe and then clamps the copper pipe at the position of the solid rod, so that the copper pipe is not easy to deform during clamping, but the method has the defect of low efficiency although being practical; in addition, as the specifications of the precise copper pipes for the cold and heat exchange of the air conditioner are different, in the process of machining the threads, the precise copper pipes with different specifications are required to be clamped, so that a large number of solid rods matched with the precise copper pipes with different specifications are required to be manufactured in advance, and the defects of manpower and material resources waste exist.

Disclosure of Invention

In order to solve the technical problems in the background technology, the invention provides a clamp for processing a precise threaded copper pipe, which comprises a rotary table assembly, an external linkage clamp assembly, an internal linkage clamp assembly and an internal linkage adjusting assembly;

the external linkage clamp assembly comprises a spiral disc and an external clamping block, the internal linkage clamp assembly comprises an internal sliding rod and an internal clamping block, and the internal linkage adjusting assembly comprises a central bevel gear and a rotary bevel gear;

the rotary table assembly is of a cylindrical structure, a spiral disc in the outer coupling clamp assembly is automatically and rotatably arranged on the outer wall of a cylinder of the rotary table assembly main body, a plurality of groups of spiral sliding columns are uniformly arranged on the side wall of the rotary table assembly main body in a sliding mode, each group of spiral sliding columns are in spiral fit with the spiral disc, the outer clamping blocks of a plurality of groups of inner arc surface structures are fixedly connected to the inner ends of the spiral sliding columns respectively, and the inner arc surfaces of the plurality of groups of outer clamping blocks are kept concentric all the time;

the inner slide bars in the groups in the inner linkage clamp assembly are uniformly arranged in a cylinder at the rear end of the main body of the turntable assembly in a springing and sliding mode, each inner slide bar in the group corresponds to each spiral sliding column in the group, the inner clamping blocks in the outer arc surface structures in the groups are fixedly connected to the inner ends of the inner slide bars in the groups respectively, the inner clamping blocks in the groups are concentric with the outer clamping blocks in the groups, the rear end of each inner slide bar in the group is transversely connected with an inner rack, the outer end of each spiral sliding column in the group is transversely connected with an outer rack, each inner rack in the group is opposite to the corresponding outer rack in the group, and a linkage gear capable of automatically lifting is meshed between each inner rack and each outer rack which are distributed correspondingly in the group;

a central bevel gear in the internal joint adjusting assembly is rotatably arranged in a cylinder at the rear end of a main body of the rotary table assembly, a plurality of groups of rotary bevel gears are meshed at positions, corresponding to the inner sliding rods, on the upper side of the central bevel gear, one side of each group of rotary bevel gears is in transmission connection with a conversion gear, the upper end of each group of internal racks is transversely connected with a conversion rack at the position, corresponding to the rotary bevel gears, and the conversion racks are meshed with the corresponding conversion gears.

Furthermore, the clamping blocks in the arrays are positioned on the inner sides of the clamping blocks outside the arrays, the sliding rods in the arrays are positioned behind the clamping blocks outside the arrays, and the copper pipes are only clamped in the neutral positions of the clamping blocks in the arrays and the clamping blocks outside the arrays in front of the sliding rods in the arrays.

Further, the rotary table assembly comprises a main rotary table and an outer clamping rotary surface, the main rotary table is of a cylindrical structure with an opening at the front end, the outer clamping rotary surface is fixedly connected to the rear end of the main rotary table in a coaxial mode, a cavity of the outer clamping rotary surface is communicated with the main rotary table, and the rear end of the outer wall of a cylinder of the main rotary table is connected with a rear connecting column.

Furthermore, the external coupling clamp assembly also comprises a sliding column groove, a rotary gear ring, an internal gear shaft and an internal driving motor, wherein the inner end of the spiral disc is rotatably connected in the rear coupling column, a plurality of groups of sliding column grooves are uniformly formed in the side wall of the main rotary table and the positions corresponding to the plurality of groups of spiral sliding columns, and the plurality of groups of spiral sliding columns are respectively inserted in the corresponding sliding column grooves in a sliding manner;

the spiral gear ring is fixedly connected to the rear end face of the spiral disc, a plurality of groups of internal gears are uniformly meshed on the inner side of the spiral gear ring, each group of internal gears are rotatably connected to corresponding internal gear shafts, and the plurality of groups of internal gear shafts are fixedly arranged on the rear end face of the main rotary table;

one side of one group of internal gears is meshed with an internal driving gear which is connected with a rotating shaft of an internal driving motor, and the internal driving motor is fixedly arranged on the rear end face of the main rotary table;

the inner connecting clamp assembly further comprises an inner sliding chute and a switching drive, wherein a plurality of groups of inner sliding chutes are formed in the side wall of the outer clamping rotating surface and at positions corresponding to the inner sliding rods, and the plurality of groups of inner sliding rods are slidably inserted into the inner cavity of the outer clamping rotating surface from the corresponding inner sliding chutes;

the rear end of each group of inner sliding rods is fixedly connected with a rear limiting plate;

the rear end of each group of rear limiting plates is transversely connected with an inner connecting rod, inner rack grooves are formed in the positions, corresponding to the inner racks, of the main surfaces of the inner connecting rods, the rear ends of the inner racks are fixedly connected with inner rack rear plates, and the inner rack rear plates are fixedly inserted into the corresponding inner rack grooves;

the rear ends of the plurality of groups of spiral sliding columns are fixedly connected with outer connecting rods at positions corresponding to the outer tooth bars, and the plurality of groups of outer tooth bars are fixedly connected with the other ends of the outer connecting rods respectively;

the rear end surface of the main rotary table is fixedly connected with a switching drive at a position corresponding to the plurality of sets of linkage gears, and the plurality of sets of linkage gears are respectively and rotatably connected in the corresponding ejector rods of the switching drive;

furthermore, the outer side of each group of inner sliding rods is sleeved with a return spring, the inner end of each return spring is clamped on the outer wall of the outer clamping rotary surface, and the outer end of each return spring is clamped on the inner end of the corresponding rear limiting plate.

Furthermore, the internal connection adjusting assembly also comprises a connecting bevel gear and a conversion rack frame, wherein the central bevel gear is rotatably connected in the outer wall of the outer clamping rotating surface;

the outer wall of the outer clamping rotary surface is fixedly connected with a rotary frame inner seat, the outer end of the rotary frame inner seat is fixedly connected with rotary frames at positions corresponding to a plurality of groups of rotary bevel gears, each group of rotary frames is rotatably connected with a rotary shaft at a position corresponding to the rotary bevel gear, the rotary bevel gears are fixedly inserted into the inner shaft ends of the corresponding rotary shafts, the plurality of groups of the rotary bevel gears are fixedly inserted into the outer shaft ends of the corresponding rotary shafts respectively, one side of each group of the rotary bevel gears is meshed with a conversion bevel gear, the other end of each group of the rotary frames is rotatably connected with a conversion shaft at a position corresponding to the conversion bevel gear, the plurality of groups of the conversion bevel gears are fixedly inserted into one end of the corresponding conversion shafts respectively, and the plurality of groups of the conversion gears are fixedly inserted into the other end of the corresponding conversion shafts respectively;

the lower ends of the array conversion racks are respectively fixed on the upper end faces of the corresponding conversion racks, and the lower ends of the array conversion racks are respectively fixedly connected with the top faces of the inner rack rear plates.

Further, the upper end of rotary bevel gear is connected with the operation bracelet.

Compared with the prior art, the clamp for machining the precise threaded copper pipe has the advantages that:

(1) according to the invention, the outer wall of the copper pipe can be clamped through the plurality of groups of outer clamping blocks in the outer clamping assembly, and meanwhile, the plurality of groups of outer clamping blocks move inwards, the linkage gear drives the inner rack and the outer rack to synchronously move in the opposite direction through the rotation of the linkage gear driven by the outer rack, so that the outer movement of the inner clamping blocks connected to the inner ends of the plurality of groups of inner racks is realized, the linkage type synchronous clamping of the inner wall and the outer wall of the copper pipe can be realized, and the roundness of the copper pipe and the precision of precision thread machining can be ensured after the clamping process.

(2) Furthermore, in order to ensure synchronous and concentric movement of the plurality of groups of outer clamping blocks, the plurality of groups of spiral sliding columns are driven to synchronously and spirally cooperate by the spiral disk capable of automatically rotating, and the synchronous inner and outer movement of the plurality of groups of spiral sliding columns can be realized by the rotation of the single spiral disk, so that the plurality of groups of outer clamping blocks can be kept in a concentric state at any time in the moving process, and the clamping precision of the outer wall of the copper pipe can be ensured.

(3) Furthermore, in order to realize the synchronization and concentricity of the plurality of groups of inner clamping blocks in the moving process, the invention is provided with an inner linkage adjustment assembly, and the inward movement of the plurality of groups of inner sliding rods driven by the spiral sliding columns through the coordination of the outer racks, the linkage gears and the inner racks can be concentrically and synchronously limited through the synchronous transmission matching of the central bevel gears arranged in the outer clamping rotary surfaces and the corresponding conversion racks connected to the rear ends of the plurality of groups of inner sliding rods.

(4) Furthermore, the copper pipe clamping and matching adjustment device can realize the adjustment of the clamping and matching of copper pipes with different wall thicknesses by arranging the linkage gear capable of automatically lifting, the inner rack can be separated from the matching of the switching drive and the inner rack by the meshing switching of the linkage gear between the switching drive and the inner rack, the central bevel gear is driven to rotate by the screwing operation bracelet, the central bevel gear can drive the multiple groups of inner slide bars to synchronously move inwards and outwards through the transmission mechanism, so that the positions of the inner slide bars relative to the spiral slide columns are changed, the size change of vacant positions between the multiple groups of outer clamping blocks and the multiple groups of inner clamping blocks is realized after the adjustment is finished, the copper pipe clamping device is suitable for clamping copper pipes with different wall thicknesses, and the clamping range of copper pipes with different specifications is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive labor.

FIG. 1 is a schematic view of the overall structure of a clamp for precision threaded copper pipe machining according to the present invention;

FIG. 2 is a schematic structural view of a turntable assembly of the present invention;

FIG. 3 is a schematic view of the mounting structure of the external coupling clamp assembly of the present invention;

FIG. 4 is a schematic structural view of a helical strut portion of the external clamp assembly of the present invention;

FIG. 5 is a schematic structural view of a spiral disk portion of the external clamp assembly of the present invention;

FIG. 6 is a schematic structural view of a drive portion of the external coupling clamp assembly of the present invention;

FIG. 7 is a schematic view of a first perspective of the present invention;

FIG. 8 is a schematic view of the present invention at a second perspective of the interlock clip assembly;

fig. 9 is a schematic structural view of the inline debugging assembly of the present invention.

Reference numerals are as follows: 1. a turntable assembly; 2. an external coupling clamp assembly; 3. an inline clip assembly; 4. an inline trim assembly; 101. a main turntable; 102. an outer clamping and rotating surface; 103. a rear connecting column; 201. a spiral disc; 202. a strut groove; 203. a helical strut; 204. an outer clamping block; 205. a rotary gear ring; 206. an internal gear; 207. an inner gear shaft; 208. an inner drive gear; 209. an internal drive motor; 301. an inner chute; 302. an inner slide bar; 303. a rear limiting plate; 304. a return spring; 305. an inner link; 306. an inner rack groove; 307. an inner rack; 308. an inner rack rear plate; 309. an outer link; 310. an outer rack; 311. a linkage gear; 312. switching drive; 313. an inner clamping block; 401. a central bevel gear; 402. operating the bracelet; 403. rotating the bevel gear; 404. a rotating shaft; 405. a rotating frame; 406. an inner seat of the rotary frame; 407. connecting a bevel gear; 408. converting the bevel gear; 409. a transfer shaft; 410. a switching gear; 411. converting the rack; 412. the carrier is switched.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Example (b): as shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, fig. 6, fig. 7, fig. 8 and fig. 9, a clamping apparatus for processing a precision threaded copper tube is provided, in which a turntable assembly 1 is a cylindrical structure, a spiral disk 201 in an outer coupling assembly 2 is automatically and spirally disposed on an outer wall of a cylinder of a main body of the turntable assembly 1, a plurality of sets of spiral sliding columns 203 are uniformly and slidably disposed on a side wall of the main body of the turntable assembly 1, each set of spiral sliding columns 203 is spirally engaged with the spiral disk 201, a plurality of sets of outer clamping blocks 204 of an inner arc structure are respectively and fixedly connected to inner ends of the spiral sliding columns 203, a plurality of sets of inner sliding rods 302 in the inner coupling assembly 3 are uniformly and elastically and slidably disposed in the cylinder at a rear end of the main body of the turntable assembly 1, each set of inner sliding rods 302 corresponds to each set of spiral sliding columns 203, a plurality of sets of inner clamping blocks 313 of an outer arc structure are respectively and fixedly connected to inner sliding rods 302, a rear end of each set of inner sliding rods 302 is transversely connected with an inner rack 307, the outer end of each set of spiral sliding columns 203 is transversely connected with an outer rack 310, each set of inner racks 307 is opposite to the corresponding outer racks 310 in tooth surface, each set of inner racks 307 and outer racks 310 which are correspondingly distributed are jointly meshed with an automatic lifting linkage gear 311, a central bevel gear 401 in an inline adjusting assembly 4 is rotatably arranged in a cylinder at the rear end of the main body of the turntable assembly 1, a plurality of sets of rotary bevel gears 403 are meshed at positions, corresponding to the inner sliding rods 302, on the upper side of the central bevel gear 401, one side of each set of rotary bevel gears 403 is in transmission connection with a conversion gear 410, the upper end of each set of inner racks 307 is transversely connected with a conversion rack 411 at a position, corresponding to the rotary bevel gears 403, and the conversion racks 411 are meshed with the corresponding conversion gears 410;

the specific structure of the turntable assembly 1 is as shown in fig. 2, a main turntable 101 is a cylindrical structure with an opening at the front end, an outer clamping and rotating surface 102 is coaxially and fixedly connected to the rear end of the main turntable 101, a cavity of the outer clamping and rotating surface 102 is communicated with the main turntable 101, and the rear end of the cylindrical outer wall of the main turntable 101 is connected with a rear coupling post 103;

the specific structure of the external coupling clamp assembly 2 is as shown in fig. 3, 4, 5 and 6, the inner end of the spiral disc 201 is rotatably connected in the rear coupling post 103, the positions of the side wall of the main rotary table 101 corresponding to the plurality of sets of spiral sliding posts 203 are uniformly provided with a plurality of sets of sliding post grooves 202, the plurality of sets of spiral sliding posts 203 are respectively slidably inserted in the corresponding sliding post grooves 202, the spiral gear ring 205 is fixedly connected on the rear end face of the spiral disc 201, the inner side of the spiral gear ring 205 is uniformly engaged with a plurality of sets of internal gears 206, each set of internal gears 206 is rotatably connected in the corresponding internal gear shaft 207, the plurality of sets of internal gear shafts 207 are fixedly installed on the rear end face of the main rotary table 101, one side of one set of internal gears 206 is engaged with an internal driving gear 208, the internal driving gear 208 is connected with the rotary shaft of an internal driving motor 209, and the internal driving motor 209 is fixedly installed on the rear end face of the main rotary table 101;

specifically, the structure of the inner coupling clamp assembly 3 is as shown in fig. 7 and 8, a plurality of sets of inner sliding grooves 301 are formed in the side wall of the outer clamping rotation surface 102 and at positions corresponding to the inner sliding rods 302, the plurality of sets of inner sliding rods 302 are slidably inserted into the inner cavity of the outer clamping rotation surface 102 from the corresponding inner sliding grooves 301, the rear end of each set of inner sliding rods 302 is fixedly connected with a rear limiting plate 303, the rear end of each set of rear limiting plate 303 is transversely connected with an inner connecting rod 305, inner rack grooves 306 are formed in the main surface of the inner connecting rod 305 and at positions corresponding to the inner rack 307, the rear end of the inner rack 307 is fixedly connected with an inner rack rear plate 308, the inner rack rear plate 308 is fixedly inserted into the corresponding inner rack grooves 306, the rear end of the plurality of sets of spiral sliding columns 203 is fixedly connected with an outer connecting rod 309 at positions corresponding to the outer rack 310, the plurality of sets of outer racks 310 are respectively fixedly connected with the other ends of the outer connecting rods 309, a rear end surface of the main turntable 101 and at positions corresponding to a plurality of sets of coupling gears 311 are fixedly connected with a switching drive 312, the plurality of sets of linkage gears 311 are respectively and rotatably connected in the ejector rods of the corresponding switching drivers 312;

the outer wall of the copper pipe can be clamped through the plurality of groups of outer clamping blocks 204 in the outer coupling clamping assembly 2, and the plurality of groups of outer clamping blocks 204 move inwards and drive the inner clamping block 313 to move outwards through the transmission mechanism, so that the linkage type synchronous clamping of the inner wall and the outer wall of the copper pipe can be realized, and the roundness of the copper pipe and the precision thread machining precision after the clamping is finished can be further improved;

specifically, the structure of the inline adjusting assembly 4 is as shown in fig. 9, a central bevel gear 401 is rotatably connected in the outer wall of the outer clamping rotary surface 102, a rotary frame inner seat 406 is fixedly connected to the outer wall of the outer clamping rotary surface 102, rotary frames 405 are fixedly connected to the outer ends of the rotary frame inner seats 406 and the positions corresponding to the plurality of sets of rotary bevel gears 403, a rotary shaft 404 is rotatably connected to the position corresponding to each set of rotary frames 405 and the rotary bevel gear 403, the rotary bevel gears 403 are fixedly inserted into the inner shaft ends of the corresponding rotary shafts 404, the plurality of sets of rotary bevel gears 407 are fixedly inserted into the outer shaft ends of the corresponding rotary shafts 404, a conversion bevel gear 408 is engaged with one side of each set of rotary frame 407, a conversion shaft 409 is rotatably connected to the position corresponding to the conversion bevel gear 408 at the other end of each set of rotary frame 405, the plurality of sets of conversion bevel gears 408 are fixedly inserted into one end of the corresponding conversion shaft 409, the plurality of conversion gears 410 are fixedly inserted into the other end of the corresponding conversion shaft 409, the lower ends of the array conversion racks 411 are respectively fixed on the upper end surfaces of the corresponding conversion racks 412, and the lower ends of the array conversion racks 412 are respectively fixedly connected on the top surfaces of the inner rack rear plates 308;

through setting up the linkage gear 311 that can rise automatically at internal connection clamp assembly 3, the meshing of linkage gear 311 between switching drive 312 and internal rack 307 is switched, can make internal rack 307 break away from the cooperation with switching drive 312, through the rotation of twisting operation bracelet 402 drive central bevel gear 401, central bevel gear 401 can drive interior slide bar 302 of array and carry out synchronous inside and outside removal through drive mechanism, make interior slide bar 302 change for the position of spiral sliding column 203, thereby realize after the regulation is accomplished, the vacancy size change between clamp splice 313 in clamp splice 204 and the array outside the array, applicable in the clamping of the copper pipe of different wall thicknesses.

The working principle is as follows:

the outer clamping and rotating surface 102 connected to the rear end of the turntable assembly 1 is connected to the rotating center of a thread machining machine tool, and the outer clamping and rotating surface 102 is coaxial with the main turntable 101 and the rear connecting column 103, so that the coaxiality of the outer clamping and rotating surface 102 and the rotating center of the machining machine tool can be ensured;

the copper pipes with different wall thicknesses can be clamped by adjusting the neutral position size when the plurality of groups of outer clamping blocks 204 are linked with the plurality of groups of inner clamping blocks 313;

by starting the switching drive 312 in the inner coupling clamp assembly 3, the linkage gear 311 is driven to move downwards, so that the linkage gear 311 is separated from the matching between the outer rack 310 and the inner rack 307;

at this time, the central bevel gear 401 is driven to rotate on the outer wall of the outer clamping surface 102 by screwing the operation bracelet 402 in the inner joint adjusting assembly 4, the central bevel gear 401 and the plurality of groups of rotating bevel gears 403 form transmission fit, the plurality of groups of rotating bevel gears 403 respectively drive the corresponding connecting bevel gears 407 to rotate, the plurality of groups of connecting bevel gears 407 respectively form transmission fit with the corresponding converting bevel gears 408, the plurality of groups of converting bevel gears 408 respectively drive the corresponding converting gears 410 to rotate coaxially, the plurality of groups of converting gears 410 synchronously form transmission fit with the plurality of groups of converting racks 411, the plurality of groups of converting racks 411 drive the synchronous transverse movement of the plurality of groups of inner rack rear plates 308 through the converting rack frames 412, the plurality of groups of inner rack rear plates 308 synchronously drive the plurality of groups of inner slide bars 302 to transverse movement through the inner connecting rods 305, and at this time, the plurality of groups of outer racks 310 and the plurality of groups of spiral slide columns 203 connected with the outer racks 310 are in a standing state, through the free transverse movement of the sliding rod 302 in the array, the conversion of the neutral position size of the clamping block 313 in the array connected to the inner end of the sliding rod 302 in the array relative to the clamping block 204 outside the array connected to the inner end of the spiral sliding column 203 in the array during clamping can be completed;

after neutral gear sizes of the inner clamping blocks 313 and the outer clamping blocks 204 of the arrays for clamping the inner wall and the outer wall of the copper pipe are confirmed according to the copper pipes with different wall thicknesses, the operation bracelet 402 is screwed to be not loosened, and the switching drive 312 is started again to drive the linkage gear 311 to move upwards, so that the linkage gear 311, the outer rack 310 and the inner rack 307 form matched transmission again, and therefore the neutral gear sizes of the inner wall and the outer wall can be regulated according to the copper pipes with different wall thicknesses, and the copper pipe clamping device has the advantage of being wide in application range;

the copper pipes are clamped in a linkage mode through the inner wall and the outer wall of each copper pipe, and the copper pipes to be clamped are placed in a neutral position between the multiple groups of inner clamping blocks 313 and the multiple groups of outer clamping blocks 204;

because the copper pipe to be processed is only clamped in the neutral positions of the array inner clamping block 313 and the array outer clamping block 204 in front of the array inner sliding rod 302, the sufficient and stable clamping force on the copper pipe can be ensured, and the existence of the array inner sliding rod 302 can not interfere with the clamping process of the copper pipe;

the inner driving gear 208 is driven to rotate by starting an inner driving motor 209 in the outer coupling clamp assembly 2, the inner driving gear 208 drives the rotary gear ring 205 to rotate by matching with the inner gear 206, the rotary gear ring 205 drives the rear coupling column 103 of the spiral disc 201 to rotate by taking the center as the center, and the spiral disc 201 drives the synchronous and concentric inward movement of the plurality of groups of outer clamping blocks 204 by matching with the spiral movement of the plurality of groups of spiral sliding columns 203;

meanwhile, the inward movement of the plurality of groups of spiral sliding columns 203 drives the inward movement of the outer connecting rods 309, the plurality of groups of outer connecting rods 309 drive the corresponding outer tooth bars 310 to move inward respectively, the plurality of groups of outer tooth bars 310 drive the plurality of groups of inner tooth bars 307 to move outward through the cooperation with the linkage gear 311, and the plurality of groups of inner tooth bars 307 drive the corresponding plurality of groups of inner sliding rods 302 to move outward synchronously through the inner connecting rods 305, so that the plurality of groups of inner clamping blocks 313 can be driven to move outward synchronously, and the linkage type internal and external clamping work on the copper pipe to be precisely threaded can be realized;

because the central bevel gear 401 is in a free rotation state, the central bevel gear 401 and the related transmission components will not interfere with the linkage of the sets of spiral sliding columns 203 and the sets of inner sliding rods 302.

Preferably, the intrados of the outer clamping blocks 204 of the plurality of sets are kept concentric all the time, the inner clamping blocks 313 of the plurality of sets are concentric with the outer clamping blocks 204 of the plurality of sets, and the inner clamping blocks 313 of the plurality of sets are positioned on the inner sides of the outer clamping blocks 204 of the plurality of sets, so that the concentricity for clamping the inner wall and the outer wall of the copper pipe can be ensured.

Preferably, the outer side of each group of inner sliding rods 302 is sleeved with a return spring 304, the inner end of the return spring 304 is clamped on the outer wall of the outer clamping rotary surface 102, and the outer end of the return spring 304 is clamped on the inner end of the corresponding rear limiting plate 303, so that natural outward elastic thrust exists in the sliding rods 302 in the arrays under a conventional state, and the inner clamping blocks 313 connected to the inner ends of the sliding rods 302 in the arrays can be attached to the inner wall of a copper pipe to be processed.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (9)

1. The utility model provides an anchor clamps for accurate screw thread copper pipe processing, includes revolving stage assembly (1), its characterized in that: the device also comprises an external linkage clamp assembly (2), an internal linkage clamp assembly (3) and an internal linkage adjusting assembly (4);

the external linkage clamp assembly (2) comprises a spiral disc (201) and an external clamping block (204), the internal linkage clamp assembly (3) comprises an internal sliding rod (302) and an internal clamping block (313), and the internal linkage adjusting assembly (4) comprises a central bevel gear (401) and a rotary bevel gear (403);

the turntable assembly (1) is of a cylindrical structure, a spiral disc (201) in the outer coupling clamp assembly (2) is automatically and rotatably arranged on the outer wall of a main body cylinder of the turntable assembly (1), a plurality of groups of spiral sliding columns (203) are uniformly and slidably arranged on the side wall of the main body of the turntable assembly (1), each group of spiral sliding columns (203) are in spiral fit with the spiral disc (201), outer clamping blocks (204) of a plurality of groups of inner arc surface structures are fixedly connected to the inner ends of the spiral sliding columns (203) respectively, and the inner arc surfaces of the plurality of groups of outer clamping blocks (204) are kept concentric all the time;

the inner slide bars (302) in the inner linkage clamp assembly (3) are uniformly arranged in a cylinder at the rear end of a main body of the turntable assembly (1) in a springing and sliding mode, each inner slide bar (302) corresponds to each spiral slide column (203), inner clamping blocks (313) of an outer arc surface structure in a plurality of groups are fixedly connected to the inner ends of the inner slide bars (302) respectively, the inner clamping blocks (313) in the plurality of groups are concentric with the outer clamping blocks (204) in the plurality of groups, the rear end of each inner slide bar (302) in each group is transversely connected with an inner rack (307), the outer end of each spiral slide column (203) in each group is transversely connected with an outer rack (310), each inner rack (307) in each group is opposite to the tooth surface of a corresponding outer rack (310), and a linkage gear (311) capable of automatically lifting is meshed between each inner rack (307) and each outer rack (310) in each group, which are distributed correspondingly;

a central bevel gear (401) in the internal joint adjusting assembly (4) is rotatably arranged in a cylinder at the rear end of a main body of the rotary table assembly (1), a plurality of groups of rotary bevel gears (403) are meshed at positions, corresponding to the inner sliding rods (302), on the upper side of the central bevel gear (401), one side of each group of rotary bevel gears (403) is in transmission connection with a conversion gear (410), the upper end of each group of inner racks (307) is transversely connected with a conversion rack (411) at the position corresponding to the rotary bevel gears (403), and the conversion racks (411) are meshed with the corresponding conversion gears (410).

2. A clamp for precision threaded copper tubing manufacture according to claim 1, wherein: the array inner clamping block (313) is located on the inner side of the array outer clamping block (204), the array inner sliding rod (302) is located behind the array outer clamping block (204), and the copper pipe is only clamped in a neutral position of the array inner clamping block (313) in front of the array inner sliding rod (302) and the array outer clamping block (204).

3. A fixture for precision threaded copper tubing machining according to claim 1 or 2, wherein: the turntable assembly (1) comprises a main turntable (101) and an outer clamping rotary surface (102), the main turntable (101) is of a cylindrical structure with an opening at the front end, the outer clamping rotary surface (102) is coaxially and fixedly connected to the rear end of the main turntable (101), a cavity of the outer clamping rotary surface (102) is communicated with the main turntable (101), the rear end of the outer wall of a cylinder of the main turntable (101) is connected with a rear connecting column (103), the outer connecting clamp assembly (2) further comprises a sliding column groove (202), a plurality of groups of spiral column grooves (202), an inner gear shaft (207) and an inner driving motor (209), the inner end of a spiral disc (201) is rotatably connected in the rear connecting column (103), the positions of the side wall of the main turntable (101) and the plurality of groups of spiral sliding columns (203) are uniformly provided with the plurality of groups of sliding column grooves (202), the plurality of groups of spiral sliding columns (203) are respectively slidably inserted in the corresponding sliding column grooves (202), and the spiral gear ring (205) is fixedly connected to the rear end face of the spiral disc (201), the even meshing of the inboard of rotating ring gear (205) has a plurality of internal gear (206), every internal gear (206) of group all swivelling joint is in corresponding inner gear axle (207), internal gear axle (207) of group all fixed mounting is in the rear end face of main revolving stage (101), one side meshing of one set of internal gear (206) has interior drive gear (208), interior drive gear (208) and the rotation hub connection of interior driving motor (209), interior driving motor (209) fixed mounting is in the rear end face of main revolving stage (101).

4. A clamp for precision threaded copper tubing machining according to claim 3, wherein: the inner connecting clamp assembly (3) further comprises an inner sliding groove (301) and a switching drive (312), the plurality of groups of inner sliding grooves (301) are arranged on the side wall of the outer clamping rotary surface (102) and at positions corresponding to the inner sliding rods (302), the plurality of groups of inner sliding rods (302) are inserted into the inner cavity of the outer clamping rotary surface (102) from the corresponding inner sliding grooves (301) in a sliding manner, the rear end of each group of inner sliding rods (302) is fixedly connected with a rear limiting plate (303), the rear end of each group of rear limiting plates (303) is transversely connected with an inner connecting rod (305), inner rack grooves (306) are formed in the positions, corresponding to the inner racks (307), of the main surfaces of the inner connecting rods (305), the rear ends of the inner racks (307) are fixedly connected with inner rack rear plates (308), the inner rack rear plates (308) are fixedly inserted into the corresponding inner rack grooves (306), and outer connecting rods (309) are fixedly connected to positions, corresponding to the outer racks (310), of the rear ends of the plurality of the spiral sliding columns (203), the multiple groups of outer racks (310) are respectively connected and fixed at the other end of the outer connecting rod (309), the rear end face of the main rotary table (101) is fixedly connected with a switching drive (312) at a position corresponding to the multiple groups of linkage gears (311), and the multiple groups of linkage gears (311) are respectively and rotatably connected in ejector rods of the corresponding switching drive (312).

5. A clamp for precision threaded copper tubing machining according to claim 4, wherein: the outer side of each group of inner sliding rods (302) is sleeved with a return spring (304), the inner end of each return spring (304) is clamped on the outer wall of the outer clamping rotary surface (102), and the outer end of each return spring is clamped on the inner end of the corresponding rear limiting plate (303).

6. A clamp for precision threaded copper tubing manufacture according to claim 3, wherein: the inner joint adjusting assembly (4) further comprises a connecting bevel gear (407) and a conversion rack frame (412), the central bevel gear (401) is rotatably connected in the outer wall of the outer clamping rotating surface (102), a rotating frame inner seat (406) is fixedly connected on the outer wall of the outer clamping rotating surface (102), rotating frames (405) are fixedly connected on the outer ends of the rotating frame inner seats (406) and the positions corresponding to the plurality of groups of rotating bevel gears (403), a rotating shaft (404) is rotatably connected on the position corresponding to each group of rotating frames (405) and the rotating bevel gears (403), the rotating bevel gears (403) are fixedly inserted at the inner shaft ends of the corresponding rotating shafts (404), the plurality of groups of connecting bevel gears (407) are fixedly inserted at the outer shaft ends of the corresponding rotating shafts (404), the conversion bevel gears (408) are meshed on one side of each group of connecting bevel gears (407), the conversion shafts (409) are rotatably connected at the positions corresponding to the other ends of the rotating frames (405) and the conversion bevel gears (408), the array conversion bevel gears (408) are fixedly inserted into one ends of the corresponding conversion shafts (409), the array conversion gears (410) are fixedly inserted into the other ends of the corresponding conversion shafts (409), the lower ends of the array conversion racks (411) are fixedly arranged on the upper end faces of the corresponding conversion rack frames (412), and the lower ends of the array conversion rack frames (412) are fixedly connected to the top faces of the inner rack rear plates (308).

7. A clamp for precision threaded copper tubing processing as claimed in claim 4 or claim 5 wherein: the inner joint adjusting assembly (4) further comprises a connecting bevel gear (407) and a conversion rack frame (412), the central bevel gear (401) is rotatably connected in the outer wall of the outer clamping rotating surface (102), a rotating frame inner seat (406) is fixedly connected on the outer wall of the outer clamping rotating surface (102), rotating frames (405) are fixedly connected on the outer ends of the rotating frame inner seats (406) and the positions corresponding to the plurality of groups of rotating bevel gears (403), a rotating shaft (404) is rotatably connected on the position corresponding to each group of rotating frames (405) and the rotating bevel gears (403), the rotating bevel gears (403) are fixedly inserted at the inner shaft ends of the corresponding rotating shafts (404), the plurality of groups of connecting bevel gears (407) are fixedly inserted at the outer shaft ends of the corresponding rotating shafts (404), the conversion bevel gears (408) are meshed on one side of each group of connecting bevel gears (407), the conversion shafts (409) are rotatably connected at the positions corresponding to the other ends of the rotating frames (405) and the conversion bevel gears (408), the array conversion bevel gears (408) are fixedly inserted into one ends of the corresponding conversion shafts (409), the array conversion gears (410) are fixedly inserted into the other ends of the corresponding conversion shafts (409), the lower ends of the array conversion racks (411) are fixedly arranged on the upper end faces of the corresponding conversion rack frames (412), and the lower ends of the array conversion rack frames (412) are fixedly connected to the top faces of the inner rack rear plates (308).

8. A clamp for precision threaded copper tubing machining according to claim 6, wherein: the upper end of the rotary bevel gear (403) is connected with an operation bracelet (402).

9. A clamp for precision threaded copper tubing machining according to claim 7, wherein: the upper end of the rotary bevel gear (403) is connected with an operation bracelet (402).

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