CN205618468U - Pushing -type clamping device is with rotatory hydro -cylinder in among CNC tube bending machine - Google Patents

Abstract

The utility model discloses a pushing -type clamping device is with rotatory hydro -cylinder in among CNC tube bending machine belongs to the CNC tube bending machine field, and its interior pushing -type clamping device who has solved the three -dimensional three -dimensional corner clamp pipe among the present CNC tube bending machine needs piston rod and cylinder body to produce relative motion with rotatory hydro -cylinder, therefore produces oil spill risk's problem easily. The utility model discloses a cylinder body and the piston rod of setting in the cylinder body still press from both sides cover and rotary rod including pushing away, 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, the rotary rod press from both sides the cover and be connected through rotating the spacer pin with pushing away. The utility model discloses can effectively avoid piston rod and hydro -cylinder cylinder body relative rotation, reduce the cylinder sealing degree of difficulty, not only avoid oil spill risk, still reduce production and use cost.

Description

Pushing-type clamping device rotary oil cylinder in a kind of CNC tube bending machine

Technical field

This utility model belongs to CNC tube bending machine field, and specifically, in relating in a kind of CNC tube bending machine, pushing-type clamping device is used Rotary oil cylinder.

Background technology

CNC tube bending machine needs to carry out pipe fitting 3 D stereo corner bending, can be because in pipe fitting bending in pipe fitting Forging Process Outer direction stress difference causes pipe fitting stretching damaged or compressed fold, and the clamping device of clamp can effectively clamp pipe fitting, give Push active force with pipe fitting, utilize simultaneously and accurately control fltting speed, improve bend pipe precision, it is to avoid pipe fitting stretching is damaged and presses Contracting fold, processes the elbow member of uniform wall thickness.But owing to conventional CNC tube bending machine clamping device is in operation, there is clamping Time not tight, loosening easily occurs in bend pipe, and tubing and pipe clamping device easily produce serious sliding phenomenon and with the damage to tubing outward appearance Wound, and clamp too tight easily damage tubing and produce improper deformation, and clamping device self can not rotate, and therefore leads It is not absolute streamlined for causing curved tubing at bending part, the bend pipe processed inharmonious with automobile entirety in appearance, damage Place's hydraulic performance decline, perishable cause shorten service life；Chinese Patent Application No. 201310659419.3, publication date 2014 2 The patent document of months 19 days, discloses the interior pushing-type clamping device of 3 D stereo corner clamp in a kind of CNC tube bending machine, belongs to CNC tube bending machine field.It includes collet, also include top fixed cover, fixed sleeves, hydraulic pressure outer shell, bearing, in push away Set, hydraulic pressure inner casing, the first hydraulic cavities and the second hydraulic cavities, described top fixed cover, fixed sleeves, hydraulic pressure outer shell, bearing, Collet, interior pushing sleeve, hydraulic pressure inner casing, the first hydraulic cavities and the second hydraulic cavities are all cyclically symmetric structure, have one common Central axis, inside is collectively forming a clamping inner chamber.The setting of these parts and assembly relation so that this invention is in clamping During tubing, it is easy to control clamping force, to tubing fanout free region, it is ensured that move forward steadily during clamping the movement of interior pushing sleeve with And the contraction of collet, it is to avoid movement is uneven to be caused disfiguring workpiece and slides.But technical scheme disclosed in this patent is adopted Using common rotary oil cylinder, clamping device is oil cylinder synchronous rotary in rotary course, rotary oil seal technology is required height, uses one section Easily producing leakage of oil after time, service life of equipment is short.

Chinese Patent Application No. 200620009497.4, the patent document in publication date on October 24th, 2007, disclose a kind of slow Speed rotary oil cylinder, the protecgulum including oil cylinder set and being located at the forward and backward two ends of this oil cylinder set and bonnet, being provided with in oil cylinder set can be in oil cylinder The piston of slide anteroposterior in set, piston connects and has piston rod, and this piston rod can extend to oil cylinder set through protecgulum slidingly back and forth Outside, the distributor port that this protecgulum, bonnet are respectively equipped with the ante-chamber with oil cylinder, back cavity communicates is logical between described piston rod and piston Cross bearing and carry out relatively turnable connection.This utility model creatively uses the attachment structure that piston rod and piston rotate against, Overcome conventional rotary oil cylinder must the Inertia of design that rotates together of whole oil cylinder, the structure making rotary oil cylinder is greatly simplified, cost It is substantially reduced, and avoids the oil leakage phenomenon caused because oil cylinder rotates.Although this technical scheme overcomes conventional rotary oil cylinder Must the Inertia of design that rotates together of whole oil cylinder, but rotary body, i.e. piston rod need nonetheless remain for contacting with hydraulic oil, even if There is rotatory sealing to isolate, but through rotating for a long time, be still unavoidable from the risk of leakage of oil, require further improvement.

Summary of the invention

1, problem to be solved

For the interior pushing-type clamping device rotary oil cylinder of the 3 D stereo corner clamp in existing CNC tube bending machine need piston rod with Cylinder body produces relative motion, thus easily produces the problem of leakage of oil risk, and this utility model pushes away in providing in a kind of CNC tube bending machine Formula clamping device rotary oil cylinder, can be prevented effectively from piston rod and rotate against with cylinder block, reduce cylinder seal difficulty, Not only avoid leakage of oil risk, also reduce production and use cost.

2, technical scheme

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

Pushing-type clamping device rotary oil cylinder in a kind of CNC tube bending machine, including cylinder body and the piston rod being arranged in cylinder body, also Including pushing away chuck and swingle, the described chuck that pushes away is arranged on piston rod external part, and described to push away chuck axially opposing with piston rod Fixing, can rotate against around axis；Described swingle is arranged in piston rod, and described swingle passes through to rotate with pushing away chuck Spacer pin connects.

Preferably, described swingle stretches to one end outer wall of piston rod external part and is provided with pin groove vertically；Described rotation Turn spacer pin and stretch in pin groove through pushing away chuck；The diameter of described rotary stopper pin is equal to the width of pin groove and less than bearing pin Groove is 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 piston rod pushes away folder and connects seat and be threaded connection with piston rod external part or radial bolts is connected.

Preferably, described being rotatably connected between set and support set is threaded connection or radial bolts connects.

Preferably, described inboard wall of cylinder block is provided with oil pocket；Described piston rod outer wall is provided with piston；Described piston is arranged In oil pocket.

3, beneficial effect

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

(1) this utility model pushes away chuck axially to promote along it under piston rod effect, but due to technological requirement, push away chuck In axial pushing course, also need to rotary motion, therefore push away chuck and be connected by rotary stopper pin with swingle, push away chuck axial During promotion, rotary stopper pin is axially moveable relative to swingle in the lump, when swingle is rotated by external force, makees at rotary stopper pin Can drive under with and push away chuck and rotate in the lump, and now push away the connected mode that can rotate against between chuck and piston rod and make piston Bar is without rotating, thus avoids traditional oils cylinder piston rod or the leakage of oil risk of cylinder body rotation generation, reduces cylinder seal difficult Degree, reduces production and use cost；

(2) this utility model arranges pin groove at swingle outer wall, can be stably connected with bearing pin bar and push away chuck, make to push away chuck with Swingle synchronous rotary, move to axial；

(3) this utility model swingle outer wall is symmetrical arranged two pin grooves, improves connective stability, makes to push away chuck and rotation Bar synchronous rotary and relative movement are more stable；

(4) this utility model is improved by reasonably structure and is linked and packed, and by position arranging bearing, is able to steady Surely the axial synchronizing moving that realizes pushing away between chuck and cylinder piston rod and rotating against, it is ensured that cylinder piston rod is pushing away chuck Rotary course is in stationary state, thus reduces sealing difficulty and cost, it is to avoid leakage of oil risk；

(5) this utility model uses two bearings of the special and ingenious setting of structure, it is ensured that this device can stable operation；

(6) this utility model piston rod pushes away folder and connects seat and be threaded connection with piston rod external part or radial bolts is connected, revolves Turn and be threaded connection between adapter sleeve and support set or radial bolts connects and is easy to quick assembling, reduce assembly cost, simultaneously Device parts are made to have interchangeability, to reduce later maintenance, maintenance cost.

Accompanying drawing explanation

Fig. 1 is cross-sectional view of the present utility model.

In figure: 1, cylinder body；2, oil pocket；3, piston；4, piston rod；5, support set；6, be rotatably connected set；7, piston Bar pushes away folder and connects seat；8, chuck is pushed away；9, rotary stopper pin；10, swingle；

11, preposition swivel bearing；111, preposition swivel bearing outer ring；112, preposition swivel bearing inner ring；

12, rearmounted swivel bearing；121, rearmounted swivel bearing inner ring；122, back-mounted rotary rotating shaft bearing outer-ring.

Detailed description of the invention

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

Embodiment 1

As it is shown in figure 1, pushing-type clamping device rotary oil cylinder in a kind of CNC tube bending machine, including cylinder body 1 be arranged on cylinder body Piston rod 4 in 1, cylinder body 1 inwall is provided with oil pocket 2；Piston rod 4 outer wall is provided with piston 3；Piston 3 is arranged on oil pocket In 2；The present embodiment also includes pushing away chuck 8 and swingle 10, pushes away chuck 8 and is arranged on piston rod 4 external part, particularly: Piston rod 4 external part is fixed with piston rod by the bolt being disposed radially and pushes away folder connection seat 7；Push away chuck 8 to stretch with piston rod 4 Go out to hold junction to be provided be rotatably connected set 6 and support set 5；The set 6 that is rotatably connected is sleeved on piston rod and pushes away on folder connection seat 7； The set 6 that is rotatably connected pushes away folder and is connected between seat 7 and is provided with preposition swivel bearing 11 with piston rod；Support set 5 is arranged on and is rotatably connected Set 6 pushes away folder with piston rod and is connected the common free end of seat 7, and support set 5 is threadably secured with the set 6 that is rotatably connected and is connected；? Support set 5 pushes away with piston rod to press from both sides to be connected between seat 7 and is provided with rearmounted swivel bearing 12；Preposition swivel bearing 11 includes preposition rotation Bearing outer ring 111 and preposition swivel bearing inner ring 112；Preposition swivel bearing outer ring 111 is fixed with set 6 axial ends that are rotatably connected Connect；Preposition swivel bearing inner ring 112 pushes away folder and is connected the fixing connection of an axial end of seat 7 with piston rod；Back-mounted rotary rotating shaft Hold 12 and include rearmounted swivel bearing inner ring 121 and back-mounted rotary rotating shaft bearing outer-ring 122；Rearmounted swivel bearing inner ring 121 and piston rod Push away folder and connect the fixing connection of another axial end of seat 7；Back-mounted rotary rotating shaft bearing outer-ring 122 is solid with the axial end of support set 5 Fixed connection；So push away chuck 8 axially opposing with piston rod 4 fixing, but can rotate against around axis；

Swingle 10 is arranged in piston rod 4, and swingle 10 stretches to one end outer wall lateral symmetry of piston rod 4 external part and arranges There are two pin grooves vertically；Swingle 10 is stretched in pin groove through pushing away chuck 8 by rotary stopper pin 9 with pushing away chuck 8 Connected；The diameter of rotary stopper pin 9, equal to the width of pin groove, so can make to push away chuck 8 rotation Tong Bu with swingle 10 Turning more stable, the diameter of rotary stopper pin 9, makes to push away chuck 8 and swingle along the axial length of swingle 10 less than pin groove 10 relative movements being capable of certain distance.

In the present embodiment, swingle 10 stretches to and pushes away one end of chuck 8 and be fixedly installed collet, and this collet is pushed away chuck 8 Wrap up, and collet outer wall is wedge structure with the inwall pushing away chuck 8, so, when in cylinder body 1, oil pocket 2 is filled with hydraulic oil Time, piston 3 moves to pushing away chuck 8 one end, owing to piston rod 4 is with to push away chuck 8 axially opposing fixing, so piston rod 4 pushes away Move and push away chuck 8 synchronizing moving, on the contrary, push away and between chuck 8 and swingle 10, be capable of moving axially of certain distance, so Push away chuck 8 relative resilient chuck generation relative movement, under wedge structure effect, push away chuck 8 and make collet clamp, thus Pipe fitting in clamping collet；After pipe fitting is clamped, rotary drive mechanism drives swingle 10 to rotate, but due to rotary stopper The effect of pin 9, pushes away chuck 8 and is able to and swingle 10 synchronous rotary, so that the pipe fitting in collet rotates in the lump, but logical Crossing the structure pushed away between chuck 8 and piston rod 4 to arrange, piston rod 4 does not rotates, thus avoids piston rod 4 and cylinder body Between there is the risk of leakage of oil, reduce sealing cost, extend oil cylinder service life.

Embodiment 2

Pushing-type clamping device rotary oil cylinder in a kind of CNC tube bending machine, same as in Example 1, except that: piston rod Push away folder connection seat 7 to be threaded connection with piston rod 4 external part；It is rotatably connected between set 6 and support set 5 by spiral shell radially Bolt is fixing to be connected.

The present embodiment realizes installation of the present utility model by another kind of connected mode, it is possible to play identical beneficial effect, with full The use of pushing-type clamping device in foot CNC tube bending machine.

Claims (8)

1. a pushing-type clamping device rotary oil cylinder in CNC tube bending machine, including cylinder body (1) with to be arranged on cylinder body (1) interior Piston rod (4), it is characterised in that: also including pushing away chuck (8) and swingle (10), the described chuck (8) that pushes away is arranged on Piston rod (4) external part, described to push away chuck (8) axially opposing with piston rod (4) fixing, can rotate against around axis； Described swingle (10) is arranged in piston rod (4), and described swingle (10) is limited by rotation with pushing away chuck (8) Position pin (9) connects.

Pushing-type clamping device rotary oil cylinder in a kind of CNC tube bending machine the most according to claim 1, it is characterised in that: Described swingle (10) stretches to one end outer wall of piston rod (4) external part and is provided with pin groove vertically；Described rotation Spacer pin (9) stretches in pin groove through pushing away chuck (8)；The diameter of described rotary stopper pin (9) is equal to the width of pin groove Degree and less than pin groove along the axial length of swingle (10).

Pushing-type clamping device rotary oil cylinder in a kind of CNC tube bending machine the most according to claim 2, it is characterised in that: Described pin groove has two, is symmetricly set on swingle (10) outer wall both sides.

Pushing-type clamping device rotary oil cylinder in a kind of CNC tube bending machine the most according to claim 2, it is characterised in that: Described piston rod (4) external part is provided with piston rod and pushes away folder connection seat (7)；Described pushes away chuck (8) and piston rod (4) External part junction is provided be rotatably connected set (6) and support set (5)；The described set (6) that is rotatably connected is sleeved on piston rod Push away folder to connect on seat (7)；The described set (6) that is rotatably connected pushes away with piston rod to press from both sides to be connected between seat (7) and is provided with preposition rotation Bearing (11)；Described support set (5) be arranged on the set (6) that is rotatably connected push away with piston rod folder is connected seat (7) common oneself By holding；Described support set (5) is fixing with the set (6) that is rotatably connected to be connected；Described support set (5) and piston rod push away folder even Rearmounted swivel bearing (12) it is provided with between joint chair (7).

Pushing-type clamping device rotary oil cylinder in a kind of CNC tube bending machine the most according to claim 4, it is characterised in that: Described preposition swivel bearing (11) includes preposition swivel bearing outer ring (111) and preposition swivel bearing inner ring (112)；Described Preposition swivel bearing outer ring (111) fixing with set (6) axial end that is rotatably connected be connected；In described preposition swivel bearing Circle (112) pushes away folder and is connected the fixing connection of an axial end of seat (7) with piston rod；Described rearmounted swivel bearing (12) Including rearmounted swivel bearing inner ring (121) and back-mounted rotary rotating shaft bearing outer-ring (122)；Described rearmounted swivel bearing inner ring (121) Push away folder with piston rod and be connected the fixing connection of another axial end of seat (7)；Described back-mounted rotary rotating shaft bearing outer-ring (122) with The axial end of support set (5) is fixing to be connected.

Pushing-type clamping device rotary oil cylinder in a kind of CNC tube bending machine the most according to claim 4, it is characterised in that: Described piston rod pushes away folder and connects seat (7) and be threaded connection with piston rod (4) external part or radial bolts is connected.

Pushing-type clamping device rotary oil cylinder in a kind of CNC tube bending machine the most according to claim 4, it is characterised in that: Described being rotatably connected between set (6) and support set (5) is threaded connection or radial bolts connection.

8. according to pushing-type clamping device rotary oil cylinder interior in a kind of CNC tube bending machine described in claim 1-7 any one, its It is characterised by: described cylinder body (1) inwall is provided with oil pocket (2)；Described piston rod (4) outer wall is provided with piston (3)； Described piston (3) is arranged in oil pocket (2).