CN205599806U - Pushing -type clamping device in improved generation for CNC tube bending machine - Google Patents

Abstract

The utility model discloses a pushing -type clamping device in improved generation for CNC tube bending machine belongs to the CNC tube bending machine field, and it has solved the current not good easy production oil leak of rotary seal during the rotation of clamping device hydro -cylinder for the CNC tube bending machine, problem that life is short. The utility model discloses a part of collet, hydro -cylinder and connection collet and hydro -cylinder, the part of connection collet and hydro -cylinder press from both sides cover and rotary rod including pushing away, the hydro -cylinder include the cylinder body and set up the piston rod in the cylinder body, push away and press from both sides cover setting and stretch out the end at the piston rod, push away and press from both sides cover and piston rod axis to relatively fixed, but around the axis relative rotation, the rotary rod setting in the piston rod, but the rotary rod with push away press from both sides the cover through the synchronous revolution just relatively axial displacement's connected mode be connected, the collet setting in the one end of rotary rod. The utility model discloses can avoid the not good and problem of oil leak of hydro -cylinder rotary seal to improve clamping device's job stabilization nature, prolonged life.

Description

Pushing-type clamping device in a kind of CNC tube bending machine modified model

Technical field

This utility model belongs to CNC tube bending machine field, specifically, relates to pushing-type clamping in a kind of CNC tube bending machine modified model Device.

Background technology

CNC tube bending machine can carry out a bending radius (single mode) in the cold state to tubing or two bending radius (bimodulus) twine Wound bending, is widely used in various pipe fittings and the bending of wire rod of the industry such as automobile, air-conditioning.Use for conventional CNC tube bending machine Clamping device is in operation, there is bend pipe when clamping tight and easily occurs loosening, and tubing and pipe clamping device easily produce serious cunning Move phenomenon and with the damage to tubing outward appearance, and clamp too tight easily damage tubing and produce improper deformation, and press from both sides Holding device self can not rotate, causing curved tubing is not absolute streamlined at bending part, and the bend pipe processed is in appearance Inharmonious with automobile entirety, injury region hydraulic performance decline, the perishable problem causing shorten service life, Chinese Patent Application No. 201310659419.3, the patent document in publication date on February 19th, 2014, disclose the three-dimensional in a kind of CNC tube bending machine and stand The interior pushing-type clamping device of body corner clamp, belongs to CNC tube bending machine field.It includes collet, also include top fixed cover, Fixed sleeves, hydraulic pressure outer shell, bearing, interior pushing sleeve, hydraulic pressure inner casing, the first hydraulic cavities and the second hydraulic cavities, described top is solid Fixed set, fixed sleeves, hydraulic pressure outer shell, bearing, collet, interior pushing sleeve, hydraulic pressure inner casing, the first hydraulic cavities and the second hydraulic pressure Chamber is all cyclically symmetric structure, has a common central axis, and inside is collectively forming a clamping inner chamber.Setting of these parts Put and assembly relation so that this invention is when clamping tubing, it is easy to control clamping force, to tubing fanout free region, it is ensured that at folder The movement of interior pushing sleeve and the contraction of collet is moved forward steadily, it is to avoid movement is uneven to be caused disfiguring workpiece and sends out during Jin Raw slip.

But technical scheme disclosed in above-mentioned patent there is also following defect: in collet relies on, pushing sleeve left end medial slope is pressed on On fixed cover, once interior pushing sleeve unclamps, and collet is in free state, and its axle center easily produces skew, is unfavorable for that tubing is pacified To the heart during dress, add tubing installation difficulty；Collet is structure as a whole, it is not easy to change, and a kind of collet can only be right A kind of size pipe should be clamped, limit the raising of production efficiency；Interior pushing sleeve interior wall construction step is many, enters the foreign bodies such as oily, grey After be not easy cleaning, add maintenance cost；Clamping device is oil cylinder synchronous rotary in rotary course, rotary oil seal technology Asking high, easily produce leakage of oil after using a period of time, service life of equipment is short.

Summary of the invention

1, problem to be solved

For the existing CNC tube bending machine the best easy generation leakage of oil of clamping device oil cylinder time rotational rotatory sealing, service life is short Problem, this utility model provides pushing-type clamping device in a kind of CNC tube bending machine modified model, by integrally-built improvement, energy Enough avoid oil cylinder rotatory sealing the best and the problem of leakage of oil, thus improve the job stability of clamping device, extend the use longevity Life.

2, technical scheme

For solving the problems referred to above, this utility model adopts the following technical scheme that.

Pushing-type clamping device in a kind of CNC tube bending machine modified model, including collet, oil cylinder and connection collet and oil The parts of cylinder, the described parts connecting collet and oil cylinder include pushing away chuck and swingle；Described oil cylinder include cylinder body and The piston rod being arranged in cylinder body, the described chuck that pushes away is arranged on piston rod external part, and described pushes away chuck with piston rod to phase To fixing, can rotate against around axis；Described swingle is arranged in piston rod, described swingle with push away chuck by can Synchronous rotary and the connected mode that can move to axial connect；Described collet is arranged on one end of swingle；Described Push away chuck and be sleeved on collet；Described collet is connected for wedge structure between chuck with pushing away.

Preferably, described collet includes collet tip side and collet elastic tip；Described collet joint End is threadeded with swingle；Described collet elastic tip outer wall is clamping ramps；Described pushes away chuck and collet bullet The inwall of a section of property end wall contacts is the inclined-plane corresponding with clamping ramps.

Preferably, collet one-level inner core it is provided with in described collet elastic tip；Described collet one-level inner core Inside it is provided with two grades of inner cores of collet；Two grades of inner core centers of described collet offer pipe fitting jaws.

Preferably, along its axially arranged flexible crack in described collet elastic tip；Described elastic crack quantity is 3-5 Bar, the circumferencial direction along collet elastic tip cross section is uniformly arranged.

Preferably, described collet one-level inner core and two grades of inner cores of collet are also equipped with elastic crack.

Preferably, described swingle stretches to one end outer wall of piston rod external part and is provided with pin groove vertically；Described pushes away By rotary stopper pin through pushing away semifixed in chuck stretches into pin groove connection between chuck with swingle；Described rotary stopper pin Diameter equal to the width of pin groove and less than pin groove along the axial length of swingle.

Preferably, described pin groove has two, is symmetricly set on swingle outer wall both sides.

Preferably, described piston rod external part is provided with piston rod and pushes away folder connection seat；Described pushes away chuck and piston rod external part Junction is provided be rotatably connected set and support set；The described set that is rotatably connected is sleeved on piston rod and pushes away on folder connection seat；Described The set that is rotatably connected pushes away with piston rod to press from both sides to be connected between seat and is provided with preposition swivel bearing；Described support set is arranged on the set that is rotatably connected Push away folder with piston rod and be connected the common free end of seat；Described support set is fixing with the set that is rotatably connected to be connected；Described support set with Piston rod pushes away and is provided with rearmounted swivel bearing between folder connection seat.

Preferably, described preposition swivel bearing includes preposition swivel bearing outer ring and preposition swivel bearing inner ring；Described is preposition Swivel bearing outer ring is fixed with the set axial end that is rotatably connected and is connected；Described preposition swivel bearing inner ring pushes away folder and is connected with piston rod One axial end of seat is fixing to be connected；Described back-mounted rotary rotating shaft is contracted and is included outside rearmounted swivel bearing inner ring and rearmounted swivel bearing Circle；Described rearmounted swivel bearing inner ring pushes away folder and is connected the fixing connection of another axial end of seat with piston rod；Described is rearmounted Swivel bearing outer ring is fixing with the axial end of support set to be connected.

Preferably, described swingle is hollow stem；Described hollow stem inner chamber is smooth inner chamber without step.

3, beneficial effect

Compared to prior art, the beneficial effects of the utility model are:

(1) this utility model collet is directly fixing with swingle is connected, even if therefore pushing away chuck to unclamp collet backward, Collet self also will not produce and rock, and is allowed to maintain the centering of self-consistentency, it is ensured that pipe fitting can be quickly and accurately Put into collet, additionally, collet is fixed by swingle, decrease pushing-type clamping in conventional CNC tube bending machine The top fixed cover used in device and fixed sleeves, simplified apparatus structure, reduces cost of manufacture, also makes outside entirety simultaneously Enclose diameter to diminish, it is thus possible to deeper enter CNC tube bending machine bend pipe position, add the convenience of operation；Piston in oil cylinder Bar, with to push away chuck axially opposing fixing, moves therefore, it is possible to push away chuck under oil cylinder effect, forces and pushes away chuck and clamp elastic clip Head, but therefore piston rod and pushing away can make to push away chuck drive elastic clip under swingle effect around axially opposing rotation again between chuck When in Tou, pipe fitting rotates, oil cylinder can not rotate completely, thus reduce cylinder seal difficulty, it is to avoid rotary oil cylinder easily leaks The risk of oil；

(2) this utility model collet tip side is threadeded with swingle, it is simple to disassembling, assembling and replacing；Collet elastic tip with Push away the setting of chuck contact surface to make to push away the movement of chuck and can quickly and stably make collet to central reduction, thus clamp Pipe fitting；

(3) arranging collet one-level inner core in this utility model collet elastic tip, in collet one-level, in-core is arranged again Two grades of inner cores of flexible chuck, so can make the pipe fitting putting in two grades of inner cores of collet be subject to more uniform chucking power, Determine so that it is guaranteed that tube clip keeps steady；Additionally collet one-level inner core and two grades of inner cores of collet all can quickly be removed, and improve The replacing of pipe fitting, installation rate, thus promote the raising of production efficiency；

(4) along its axially arranged elastic crack and collet one-level inner core and bullet in this utility model collet elastic tip Property two grades of inner cores of chuck on elastic crackle all can make elastic increase, utilize and shunk by crack elastic during chucking power, relax Open the stable holding of pipe fitting；

(5) this utility model utilize rotary stopper pin and pin groove coordinate realize pushing away synchronous rotary between chuck and swingle, The function of axially opposing movement, simple in construction, stable, reliability is high；

(6) this utility model is provided with piston rod at piston rod external part and pushes away folder connection seat, and is pushing away chuck and piston rod external part Junction is provided be rotatably connected set and support set, by preposition swivel bearing and rearmounted swivel bearing piston rod pushed away folder connect seat, Be rotatably connected set, support set three ingenious be arranged to promote to push away chuck realize with piston rod vertically synchronizing moving but relative around axis The mechanism of spinfunction, smart structural design, simple, assembly difficulty is low, and flexible movements, makes to push away chuck with piston rod along axle More stable to synchronizing moving, make to push away chuck and rotate against around axis more flexible with piston rod；

(7) position of the preposition swivel bearing of this utility model and rearmounted swivel bearing arranges and makes piston rod push away folder connection seat, rotate even Between female connector, support set three, structure is compacter, reduces overall volume, makes three synchronize simultaneously and relative motion is cleverer Live, stablize, and then improve the machining accuracy of equipment CNC tube bending machine；

(8) this utility model swingle is arranged to hollow stem, greatly reduces equipment overall weight under meeting rigid requirements premise, Reduce cost, and hollow stem inner chamber is smooth inner chamber without step, not only reduces difficulty of processing, more can conveniently enter rotation The cleaning of the greasy dirt within bar, than prior art, later stage nursing is convenient, light.

Accompanying drawing explanation

Fig. 1 is this utility model oil cylinder and the cross-sectional view with collet connection member thereof；

Fig. 2 is this utility model collet cut-away section structural representation；

Fig. 3 is this utility model entirety cross-sectional view；

Fig. 4 is the end face structure schematic diagram of collet.

In figure: 1, collet；11, collet tip side；12, collet elastic tip；13, in collet one-level Core；14, two grades of inner cores of collet；15, pipe fitting jaws；

2, chuck is pushed away；3, swingle；4, piston rod；41, piston；5, cylinder body；51, oil pocket；

6, piston rod pushes away folder connection seat；61, preposition swivel bearing；62, rearmounted swivel bearing；611, outside preposition swivel bearing Circle；612, preposition swivel bearing inner ring；621, rearmounted swivel bearing inner ring；622, back-mounted rotary rotating shaft bearing outer-ring；

7, be rotatably connected set；8, support set；9, rotary stopper pin.

Detailed description of the invention

Below in conjunction with specific embodiment, this utility model is further described below.

Embodiment 1

As it is shown on figure 3, pushing-type clamping device in a kind of CNC tube bending machine modified model, including collet 1, oil cylinder and company Connecing the parts of collet 1 and oil cylinder, the parts connecting collet 1 and oil cylinder include pushing away chuck 2 and swingle 3；

As in figure 2 it is shown, oil cylinder includes cylinder body 5 and the piston rod 4 being arranged in cylinder body 5, push away chuck 2 and be arranged on piston rod 4 External part, pushes away chuck 2 axially opposing with piston rod 4 fixing, can rotate against around axis, specifically, and piston rod 4 external part It is provided with piston rod and pushes away folder connection seat 6；Push away chuck 2 and be provided be rotatably connected set 7 and support with piston rod 4 external part junction Set 8；The set 7 that is rotatably connected is sleeved on piston rod and pushes away on folder connection seat 6；The set 7 that is rotatably connected push away with piston rod press from both sides be connected seat 6 it Between be provided with preposition swivel bearing 61, in preposition swivel bearing 61 includes preposition swivel bearing outer ring 611 and preposition swivel bearing Circle 612；Preposition swivel bearing outer ring 611 is fixed with set 7 axial ends that are rotatably connected and is connected；Preposition swivel bearing inner ring 612 Push away folder with piston rod and be connected the fixing connection of an axial end of seat 6；Support set 8 is arranged on the set 7 that is rotatably connected and pushes away with piston rod Folder connects the common free end of seat 6；Support set 8 is fixed with the set 7 that is rotatably connected and is connected；Support set 8 pushes away folder and is connected with piston rod It is provided with rearmounted swivel bearing 62 between seat 6；Rearmounted swivel bearing 62 includes rearmounted swivel bearing inner ring 621 and rearmounted rotation Bearing outer ring 622；Rearmounted swivel bearing inner ring 621 pushes away folder and is connected the fixing connection of another axial end of seat 6 with piston rod； Back-mounted rotary rotating shaft bearing outer-ring 622 is fixing with the axial end of support set 8 to be connected；

Swingle 3 is arranged in piston rod 4, swingle 3 with push away chuck 2 by can synchronous rotary and can moving to axial Connected mode connects, specifically, as in figure 2 it is shown, one end outer wall lateral symmetry that swingle 3 stretches to piston rod 4 external part sets It is equipped with two pin grooves vertically；Push away and stretch into pin by rotary stopper pin 9 through pushing away chuck 2 between chuck 2 and swingle 3 Semifixed connection in axial trough；The diameter of rotary stopper pin 9 equal to pin groove width and less than pin groove axial along swingle 3 Length；

Collet 1 is arranged on one end of swingle 3, and specifically, collet 1 includes collet tip side 11 and elasticity Chuck elastic tip 12, collet tip side 11 is threadeded with swingle 3；Push away chuck 2 and be sleeved on collet 1, elastic Chuck 1 is connected for wedge structure between chuck 2 with pushing away, and specifically, collet elastic tip 12 outer wall is clamping ramps, pushes away folder Set 2 inwalls with a section of collet elastic tip 12 wall contacts are the inclined-plane corresponding with clamping ramps；

As shown in Figure 1 and Figure 4, along its axially arranged flexible crack in collet elastic tip 12, elastic crack quantity is 4 Bar, the circumferencial direction along collet elastic tip 12 cross section is uniformly arranged；It is provided with elastic clip in collet elastic tip 12 First level inner core 13, is provided with two grades of inner cores 14 of collet, two grades of inner cores 14 of collet in collet one-level inner core 13 Center offers pipe fitting jaws 15, as shown in Figure 4, collet one-level inner core 13 and two grades of inner cores 14 of collet also sets It is equipped with elastic crack；

In order to reduce difficulty of processing, and the cleaning of the convenient greasy dirt entered within swingle, make later stage nursing convenient, light Pine, in the present embodiment, swingle 3 is hollow stem, and hollow stem inner chamber is smooth inner chamber without step.

In the present embodiment a kind of CNC tube bending machine modified model, the operation principle of pushing-type clamping device is: hydraulic power unit is oil in oil cylinder Chamber 51 input pressure fluid, pressure oil liquid promote piston 41, make piston rod 4 move forward, piston rod 4 with push away chuck 2 axle To being relatively fixed, under piston rod effect, push away chuck 2 and be axially moveable in the lump, and push away chuck 2 and collet elastic tip 12 The inwall of a section of wall contacts is the inclined-plane corresponding with clamping ramps, so pushing away the chuck 2 collet bullet to collet 1 Property end 12 applies chucking power, forces collet 1 to clamp pipe fitting；After pipe fitting clamping, owing to technique needs, pipe fitting needs spring Curl rotates, and now arranges a revolving power mechanism and bar 3 is rotated rotates, swingle 3 with push away chuck 2 by can be synchronize Rotate and the connected mode that can move to axial connect, while therefore swingle 3 rotates, push away chuck 2 also can synchronous rotary, So the pipe fitting in collet 1, push away chuck 2, swingle 3 three achieves synchronous rotary, it is important that push away chuck 2 And owing to can rotate against around axis between piston rod, while therefore pushing away chuck 2 rotation, piston rod 4 and cylinder body 5 are without rotation Turning, this needs rotatory sealing safer compared to existing technology, and stable higher, service life is longer.

This utility model has made subversive change compared to existing technology, not only solves a lot of problems of prior art, also carries Carry out more advantage: overall volume diminishes, installation, more convenient operation, indirectly promote the raising producing effect；Collet Improving to avoid when pipe fitting is installed and be not easy the problem to the heart, make pipe fitting once mounting put in place, speed is accelerated, and improves production effect Rate；Collet uses multilamellar core arrangement, is not only convenient for changing to adapt to the pipe fitting of different-diameter specification, and makes clamping essence Degree and stability are higher；Device center uses hollow-core construction, and without interior step, not only reduces difficulty of processing, more can make greasy dirt Cleaning difficulty reduces, thus reduces maintenance and repair cost；When under technological requirement, workpiece rotates, oil cylinder remains stationary state, Substantially increase oil cylinder stability, not only avoid the employing contour cost technology of rotatory sealing, more can play and to increase the service life Effect.

Claims (10)

1. a pushing-type clamping device in CNC tube bending machine modified model, including collet (1), oil cylinder and connection elastic clip Head (1) and the parts of oil cylinder, it is characterised in that: described connection collet (1) and the parts of oil cylinder include pushing away chuck (2) With swingle (3)；Described oil cylinder includes cylinder body (5) and the piston rod (4) being arranged in cylinder body (5), and described pushes away folder Set (2) is arranged on piston rod (4) external part, and described to push away chuck (2) axially opposing with piston rod (4) fixing, around axle Line can rotate against；In described swingle (3) is arranged on piston rod (4), described swingle (3) with push away chuck (2) By can synchronous rotary and the connected mode that can move to axial connect；Described collet (1) is arranged on swingle (3) One end；The described chuck (2) that pushes away is sleeved on collet (1)；Described collet (1) and pushing away between chuck (2) Connect for wedge structure.

Pushing-type clamping device in a kind of CNC tube bending machine modified model the most according to claim 1, it is characterised in that: described Collet (1) include collet tip side (11) and collet elastic tip (12)；Described collet joint End (11) is threadeded with swingle (3)；Described collet elastic tip (12) outer wall is clamping ramps；Described pushes away The chuck (2) inwall with a section of collet elastic tip (12) wall contacts is the inclined-plane corresponding with clamping ramps.

Pushing-type clamping device in a kind of CNC tube bending machine modified model the most according to claim 2, it is characterised in that: described Collet elastic tip (12) in be provided with collet one-level inner core (13)；Described collet one-level inner core (13) Inside it is provided with two grades of inner cores (14) of collet；Two grades of inner core (14) centers of described collet offer pipe fitting jaws (15).

Pushing-type clamping device in a kind of CNC tube bending machine modified model the most according to claim 3, it is characterised in that: described Collet elastic tip (12) on along its axially arranged flexible crack；Described elastic crack quantity is 3-5 bar, along bullet The circumferencial direction of property chuck elastic tip (12) cross section is uniformly arranged.

Pushing-type clamping device in a kind of CNC tube bending machine modified model the most according to claim 4, it is characterised in that: described Collet one-level inner core (13) and two grades of inner cores (14) of collet on be also equipped with elastic crack.

Pushing-type clamping device in a kind of CNC tube bending machine modified model the most according to claim 2, it is characterised in that: described Swingle (3) stretch to one end outer wall of piston rod (4) external part and be provided with pin groove vertically；Described pushes away chuck (2) Semifixed in chuck (2) stretches into pin groove connection is pushed away with being passed by rotary stopper pin (9) between swingle (3)；Described The diameter of rotary stopper pin (9) equal to the width of pin groove and less than pin groove along the axial length of swingle (3).

Pushing-type clamping device in a kind of CNC tube bending machine modified model the most according to claim 6, it is characterised in that: described Pin groove have two, be symmetricly set on swingle (3) outer wall both sides.

Pushing-type clamping device in a kind of CNC tube bending machine modified model the most according to claim 2, it is characterised in that: described Piston rod (4) external part be provided with piston rod push away folder connect seat (6)；The described chuck (2) that pushes away stretches out with piston rod (4) End junction is provided be rotatably connected set (7) and support set (8)；The described set (7) that is rotatably connected is sleeved on piston rod and pushes away folder Connect on seat (6)；The described set (7) that is rotatably connected pushes away with piston rod to press from both sides to be connected between seat (6) and is provided with preposition swivel bearing (61)；Described support set (8) is arranged on the set (7) that is rotatably connected and pushes away folder with piston rod and be connected the common free end of seat (6)； Described support set (8) is fixing with the set (7) that is rotatably connected to be connected；Described support set (8) pushes away folder and is connected seat (6) with piston rod Between be provided with rearmounted swivel bearing (62).

Pushing-type clamping device in a kind of CNC tube bending machine modified model the most according to claim 8, it is characterised in that: described Preposition swivel bearing (61) include preposition swivel bearing outer ring (611) and preposition swivel bearing inner ring (612)；Before described To put swivel bearing outer ring (611) fixing with set (7) axial end that is rotatably connected is connected；Described preposition swivel bearing inner ring (612) Push away folder with piston rod and be connected the fixing connection of an axial end of seat (6)；Described rearmounted swivel bearing (62) includes back-mounted rotary Turn bearing inner race (621) and back-mounted rotary rotating shaft bearing outer-ring (622)；Described rearmounted swivel bearing inner ring (621) and piston rod Push away folder and connect the fixing connection of another axial end of seat (6)；Described back-mounted rotary rotating shaft bearing outer-ring (622) and support set (8) Axial end fixing connect.

10. according to pushing-type clamping device, its feature in a kind of CNC tube bending machine modified model described in claim 1-9 any one It is: described swingle (3) is hollow stem；Described hollow stem inner chamber is smooth inner chamber without step.