CN201175838Y

CN201175838Y - Bidirectional flexible cramp

Info

Publication number: CN201175838Y
Application number: CNU2008200340982U
Authority: CN
Inventors: 吴小邦
Original assignee: Changzhou Vocational Institute of Mechatronic Technology
Current assignee: Changzhou Vocational Institute of Mechatronic Technology
Priority date: 2008-04-15
Filing date: 2008-04-15
Publication date: 2009-01-07
Anticipated expiration: 2018-04-15

Abstract

The utility model relates to a bidirectional soft clamp, which comprises a case body, a piston, a belt roller and an elastic clamping sleeve with an axial groove mouth, a piston chamber is arranged on an engine body and an engine cover of the case body, the engine body and the engine cover are internally provided with a pressure inlet channel and a pressure discharge channel which are communicated with the piston chamber, a shaft sleeve is mounted in a mounting hole of the engine body via a bearing, the belt roller is connected with the shaft sleeve, a shaft hole of the shaft sleeve is internally equipped with a fixing taper sleeve and a moving taper sleeve of a taper hole which is large in internal and small in mouth, a return spring is mounted between the fixing taper sleeve and the moving taper sleeve, two elastic clamping sleeves of which the peripheries are provided with conical surfaces are mounted in the taper hole of the fixing taper sleeve and the moving taper sleeve and are engaged with the taper hole, the inner hole wall of the elastic clamping sleeve is embedded with more than three flexible insert rings, the piston is hermetically mounted in the piston chamber and provided with a top cover with a through hole, and a thrust bearing is mounted in a shaft shoulder of the moving taper sleeve and a bearing seat of the top cover. The bidirectional soft clamp is compact and reasonable in structure, stable in clamping impact force and short in axial size.

Description

Two-way soft anchor clamps

Technical field

The utility model relates to a kind of two-way soft anchor clamps, belongs to the mechanical grip field of tool.

Background technology

For endoporus and the both ends of the surface of processing length than short thin-wall pipe, as three-jaw chuck with routine, need the tune holding workpiece, cause work piece positioning tightly inaccurate, and clamping force is to pass through Artificial Control, not only can cause impression, but also can cause the fragmentation of nonmetal thin-wall pipe at surface of the work.Clamp accurately for ease of the location, as CN2119985U disclosed " two-way chuck structure improvement ", by framework, annular base body, the annular rotating shaft, two sliding sleeves, two pistons and two collet chucks constitute, the annular base body that is hollow is installed in the framework, two fixed caps connect on the annular base body, pedestal is provided with oilhole, annular rotating shaft one end that is hollow extends framework and is connected with belt pulley outward, two pistons are installed between the sliding sleeve of taper hole that annular rotating shaft and two have reverse symmetry, and outer rim is separately positioned in the taper hole of two sliding sleeves for the collet chuck of cylindrical hole in tapered, when two-piston moves because of oil pressure promotes two sliding sleeves, when two sliding sleeves are moved by two opposite longitudinal forces, two conical surfaces that outer rim matches of conical surface compressing in it, wedging two folder tubes, thereby wedging processing parts in it.Its rotating shaft of two-way chuck structure, sliding sleeve, piston and the collet chuck of this structure are to rotate together, so oil channel structures is very complicated.Secondly, adopt dual-piston structure, and belt pulley is an external structure, the longitudinal size of anchor clamps is bigger, is not suitable for the short location of Workpiece length and clamps.Moreover, because the clamping force of collet chuck directly offers piston by fluid, clamping force is bigger, and the moment of clamping work pieces, the fluid shock loading is bigger, make surface of the work can extrude impression, even can clip broken non-metal workpiece, the location that therefore can not adapt to the pipe fitting of thin-walled fragility such as powder metallurgy, ceramic material material clamps occasion.

Summary of the invention

The purpose of this utility model provides a kind of compact conformation, reasonable, and it is steady to clamp impulsive force, the two-way soft anchor clamps that axial dimension is short.

The utility model is that the technical scheme that achieves the above object is: a kind of two-way soft anchor clamps, comprise casing, piston, belt pulley and elastic jacket with axial notch, it is characterized in that: described casing is connected and composed by body and cover, have plunger shaft in body and the cover, have the entrance pressure duct and the release duct that communicate with plunger shaft in cover and the body; Axle sleeve is installed in the installing hole of body by bearing, the belt pulley that is positioned at the body groove is connected on the axle sleeve, and the fixedly tapered sleeve and the movable tapered sleeve of big young taper hole in being equipped with in the axis hole of axle sleeve, back-moving spring are installed in fixedly tapered sleeve and can be along between the axially movable movable tapered sleeve of axle sleeve; The elastic jacket that periphery has a conical surface is installed in the taper hole of fixedly tapered sleeve and movable tapered sleeve and with taper hole and matches, the inner hole wall interlocking of elastic jacket has the flexible filler rod more than three, piston seal is installed in the plunger shaft, piston has the top cover of band via hole, and thrust bearing is installed in the bearing block of the shaft shoulder of movable tapered sleeve and top cover.

The utility model has the following advantages after adopting technique scheme:

1, compact conformation is reasonable.The utility model is equipped with fixedly tapered sleeve and movable tapered sleeve in axle sleeve, elastic jacket is installed in fixedly in the tapered sleeve and movable tapered sleeve, because the elastic jacket male cone (strobilus masculinus) is with fixedly tapered sleeve and movable tapered sleeve taper hole match, and moving axially by piston control activity tapered sleeve, the elastic jacket that pushing is mated, and the conical surface of elastic jacket opposite side relies on the fixedly internal taper hole extruding of tapered sleeve, because elastic jacket is tightened up at two ends, make elastic jacket distortion and clamp part to be processed it in, the location clamps accurate.The utility model is controlled moving and clamping work pieces of movable tapered sleeve by single piston, compact conformation, reasonable.

2, the clamping impulsive force is steady.The utility model is in the moving process of piston, be pushing force to be acted on the movable tapered sleeve by thrust bearing, movable tapered sleeve pushes elastic jacket again, because the piston that is arranged in the box body is not rotatablely move with axle sleeve, therefore in moment of clamping work pieces, this thrust bearing has played the effect of buffering, and it is steady to clamp impulsive force.

3, the anchor clamps axial dimension is little.The belt pulley that the utility model will be connected with power is arranged in the groove of body, be built-in structure, and built-in single piston structure makes that the anchor clamps axial dimension is compacter, but the clamping short zero and the processing of not stopping are increased work efficiency.

4, prevent to crush workpiece.The utility model is rabbeted on the elastic jacket inwall flexible filler rod, and flexible filler rod contacts with the workpiece outer surface, has solved surface of the work impression problem, and effectively prevents to crush workpiece, and the location that can be widely used in thin-walled brittle workpiece such as powder metallurgy, pottery clamps.

Description of drawings

Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the structural representation of elastic jacket.

Fig. 3 is the sectional structure schematic diagram of Fig. 2 A-A.

Wherein: 1-cover, 1-1-entrance pressure duct, 2-piston, 2-1-top cover, 2-2-stepped hole, the 2-3-bearing block, 3-banking pin, 4-bearing, 5-axle sleeve, 5-1-convex shoulder, the 6-thrust bearing, the movable tapered sleeve of 7-, 8-elastic jacket, 8-1-axial notch, 9-body, 9-1-release duct, 9-2-boss, 10-support, 11-belt, 12-belt pulley, the 12-1-boss, the 13-back-moving spring, 14-is tapered sleeve fixedly, the 15-workpiece, the flexible filler rod of 16-, 17-inner shield ring, the outer back-up ring of 18-, 19-plunger shaft.

The specific embodiment

See shown in Figure 1ly, two-way soft anchor clamps of the present utility model comprise casing, axle sleeve 5, belt pulley 12, piston 2, bearing 4, thrust bearing 6, fixedly tapered sleeve 14 and movable tapered sleeve 7 and elastic jacket 8.This casing is connected and composed by body 9 and cover 1, has plunger shaft 19 in body 9 and the cover 1, and casing connects on support 10 or the work top and with main frame and is connected.Have the entrance pressure duct 1-1 that communicates with plunger shaft 19 on the cover 1, and be provided with the release duct 9-1 that communicates with plunger shaft 19 in the body 9, by entrance pressure duct 1-1 and release duct 9-1 the pressure medium of outside is delivered to the plunger shaft 19 interior pistons 2 that promote and move axially.When the metal works of clamping heavy wall, this pressure medium adopts hydraulic oil, and during the clamping thin-wall workpiece, this pressure medium can adopt Compressed Gas, utilize the compressibility of Compressed Gas, reach the purpose that flexibility compresses, so be more suitable for breakable workpiece such as the nonmetal and fragility of clamping.

See shown in Figure 1, axle sleeve 5 of the present utility model is installed in the installing hole of body 9 by bearing 4, one end of body 9 is provided with groove, belt pulley 12 is arranged in the groove of body 9, because belt pulley 12 is an embedding structure, so can dwindle the axial dimension of anchor clamps, belt pulley 12 is connected on the axle sleeve 5 by key or securing member, belt 11 is installed on belt pulley 12 and the driving wheel, and power is reached on the axle sleeve 5.Fixedly tapered sleeve 14 and the movable tapered sleeve 7 installed in the axis hole of axle sleeve 5, big young taper hole in fixedly tapered sleeve 14 and movable tapered sleeve 7 all have, fixedly tapered sleeve 14 is installed on the axle sleeve 5 and can not moves, movable tapered sleeve 7 is installed in the axle sleeve 5 and can moves axially along axle sleeve 5, and back-moving spring 13 is installed in fixedly between the tapered sleeve 14 and movable tapered sleeve 7.See shown in Fig. 1～3, elastic jacket 8 its two peripheries of the present utility model have the conical surface, elastic jacket 8 has 3～6 axial notch 8-1 that do not run through, this elastic jacket 8 is installed in the taper hole of fixedly tapered sleeve 14 and movable tapered sleeve 7 and with taper hole and matches, the interlocking of elastic jacket 8 inner hole walls has the flexible filler rod 16 more than three, see shown in Figure 3, this flexibility filler rod 16 can be uniform 3～6, flexible filler rod 16 can adopt wear-resisting flexible materials such as polytetrafluoroethylene, prevent impression on workpiece 15 outer walls because flexible filler rod 16 contacts with workpiece 15 effectively, and prevent the fragmentation of workpiece effectively.

See shown in Figure 1, piston 2 of the present utility model has the top cover 2-1 of band via hole, piston 2 sealings are installed in the plunger shaft 19, and thrust bearing 6 is installed in the bearing block 2-3 of the shaft shoulder of movable tapered sleeve 7 and top cover 2-1, pressure medium promotes piston 2 and moves axially, and depresses movable tapered sleeve 7 by thrust bearing 6 again.For preventing that piston 2 from exceeding the axial displacement of setting, see shown in Figure 1, banking pin 3 to top cover 2-1 axial limiting also is installed on the body 9, this top cover 2-1 is provided with stepped hole 2-2, the convex shoulder of banking pin 3 is positioned at the macropore of stepped hole 2-2, for ease of installing, top cover 2-1 is installed on the piston 2 by securing member.

See shown in Figure 1, bearing 4 of the present utility model can two be installed between axle sleeve 5 and the body 9, and be provided with inner shield ring 17 between the two bearings 4, the convex shoulder 5-1 of one end of axle sleeve 5 is spacing to bearing 4 inner rings, the outer ring that is installed in the 18 pairs of bearings 4 of outer back-up ring on the body 9 is spacing, the boss 12-1 on the belt pulley 12 and the inner ring of another bearing 4 join spacing, and the boss 9-2 on the body 9 and the outer ring of another bearing 4 join spacing.

During the utility model work, when pressure medium enters in the plunger shaft 19 when promoting piston 2 and moving down by entrance pressure duct 1-1, the top cover 2-1 of piston 2 depresses thrust bearing 6, thrust bearing 6 is pressed to the movable tapered sleeve 7 in the axle sleeve 5, the conical surface that the taper hole pushing elastic jacket 8 of movable tapered sleeve 7 matches, elastic jacket 8 is moved down, thereby the close fixedly taper hole of tapered sleeve 14 of the conical surface that makes its opposite side, elastic jacket 8 is tightened up at two ends, strain clamping work pieces 15 by elastic jacket 8, after the both ends of the surface and endoporus completion of processing of workpiece 15, pressure medium enters in the plunger shaft 19 from the release duct 9-1 on the body 9, and this moment, entrance pressure duct 1-1 played the release effect, make on the piston 2 and move, back down movable tapered sleeve 7 and thrust bearing 6 simultaneously under back-moving spring 13 effects, thereby elastic jacket 8 unclamps, workpiece 15 relies on deadweight to fall.

Claims

1, a kind of two-way soft anchor clamps, comprise casing, piston (2), belt pulley (12) and elastic jacket (8) with axial notch, it is characterized in that: described casing is connected and composed by body (9) and cover (1), have plunger shaft (19) in body (9) and the cover (1), have the entrance pressure duct (1-1) and release duct (9-1) that communicate with plunger shaft (19) in cover (1) and the body (9); Axle sleeve (5) is installed in the installing hole of body (9) by bearing (4), the belt pulley (12) that is positioned at body (9) groove is connected on the axle sleeve (5), and the fixedly tapered sleeve (14) and the movable tapered sleeve (7) of big young taper hole in being equipped with in the axis hole of axle sleeve (5), back-moving spring (13) are installed in fixedly tapered sleeve (14) and can be along between the axially movable movable tapered sleeve of axle sleeve (5) (7); The elastic jacket (8) that periphery has a conical surface is installed in the taper hole of fixedly tapered sleeve (14) and movable tapered sleeve (7) and with taper hole and matches, the inner hole wall interlocking of elastic jacket (8) has the flexible filler rod (16) more than three, piston (2) sealing is installed in the plunger shaft (19), piston (2) has the top cover (2-1) of band via hole, and thrust bearing (6) is installed in the bearing block (2-3) of the shaft shoulder of movable tapered sleeve (7) and top cover (2-1).

2, two-way soft anchor clamps according to claim 1 is characterized in that: the banking pin (3) to top cover (2-1) axial limiting also is installed on the described body (9).

3, two-way soft anchor clamps according to claim 2, it is characterized in that: described top cover (2-1) is provided with stepped hole (2-2), and the convex shoulder of banking pin (3) is positioned at the macropore of stepped hole (2-2).

4, two-way soft anchor clamps according to claim 1 is characterized in that: described two bearings (4) are installed between axle sleeve (5) and the body (9), and are provided with inner shield ring (17) between two bearings (4)

5, two-way soft anchor clamps according to claim 4, it is characterized in that: an end of described axle sleeve (5) has the convex shoulder (5-1) spacing to bearing (4) inner ring, the outer back-up ring (18) that is installed on the body (9) is spacing to the outer ring of bearing (4), boss (12-1) on the belt pulley (12) joins with the inner ring of another bearing (4), and the boss (9-2) on the body (9) joins with the outer ring of another bearing (4).

6, two-way soft anchor clamps according to claim 1, it is characterized in that: described top cover (2-1) detachably is installed on the piston (2).