TWM633021U - Built-in hydraulic chuck - Google Patents

Abstract

A built-in oil pressure chuck includes an oil pressure cylinder unit, a chuck unit and a bearing unit. The hydraulic cylinder unit includes a cylinder body and a spindle part, the cylinder body has a cylinder chamber, the spindle part has a piston ring, the chuck unit can rotate relative to the hydraulic cylinder unit, and includes a chuck The main body, an end cover group, a plurality of gripper groups and a plurality of linkage groups. These linkage groups are moved by the mandrel and can move the corresponding gripper groups in the radial direction. The bearing unit is installed on the hydraulic cylinder unit between the chuck unit and provide smooth rotation when the chuck unit rotates relative to the hydraulic cylinder unit.

Description

Built-in hydraulic chuck

The present invention relates to a processing machine, in particular to a built-in hydraulic chuck.

TW Publication No. 580412 Patent Case discloses a previous technology of a lathe spindle. A main shaft sleeve runs through a shaft seat and is pivotally connected with many bearings. One end of the main shaft sleeve can be connected to a chuck, and the other end is fixed with a pulley and an oil Press the rotary cylinder, and the main shaft sleeve also has a pull rod, and the end of the pull rod is fixedly connected with an end shaft with a piston. The end shaft is provided with a cover body, and a piston is placed in the housing chamber. The body and the pulley are fixed, and there are anti-leakage rings in the body of the cover and on the piston, and an oil hydraulic rotary cylinder is provided on the end shaft, and there are oil inlet and outlet ring grooves and inlet and outlet in the end shaft. The oil circuit is connected, so that the hydraulic oil can enter the left or right side of the piston to push the piston to move left and right, and thereby achieve the purpose of driving the pull rod to move synchronously, so as to effectively control the action of the jaws on the chuck.

The main shaft of this kind of machine tool needs to be equipped with a pull rod, and the actuation of the pull rod is controlled by hydraulic pressure, and the automatic opening and closing of the jaws of the collet is controlled by the pull rod, which will lead to a more complicated overall structure and more troublesome manufacturing and assembly. Large in size and takes up more space.

Therefore, the purpose of the present invention is to provide a built-in hydraulic chuck that can solve existing deficiencies.

Therefore, the built-in hydraulic chuck of the present invention includes a hydraulic cylinder unit, a chuck unit and a bearing unit. The hydraulic cylinder unit includes a cylinder body arranged along an axis, and a spindle member installed inside the cylinder body, the cylinder body has a cylinder chamber, and the spindle member has a piston arranged in the cylinder chamber ring, the piston ring can be converted between a first position and a second position relative to the cylinder chamber along the axis under the action of oil pressure, the clamp unit can rotate relative to the hydraulic cylinder unit, and includes a clamp The head body, an end cover set mounted on the chuck body and ring-shaped around the axis, a plurality of jaw groups installed on the chuck body and slidable in a radial direction perpendicular to the axis, and most connected to the The end cover group corresponds to the linkage group of the jaw sets respectively, the end cover set defines an annular groove, each jaw set has a first slope, and each linkage group has a The second slanted surface combined, the linkage groups are affected by the movement of the mandrel along the axis, and can be linked to the corresponding jaws to move in the radial direction. The bearing unit is installed between the hydraulic cylinder unit and the chuck unit. between the cylinder chamber and the jaw sets, the bearing unit is embedded in the ring groove, and when the chuck unit rotates relative to the hydraulic cylinder unit, the bearing unit provides The hydraulic cylinder unit rotates smoothly.

The effect of this new model is: using the cooperation between the end cover group of the chuck unit and the bearing unit, the connection between the end cover group and the linkage groups, and the linkage groups can link the corresponding jaw groups, then start the pressure source and When the mandrel is linked with the linked groups to move along the axis, it can be linked with the corresponding jaw group to move in the radial direction, and when the chuck unit rotates relative to the hydraulic cylinder unit, the end cover group can be used to Sliding friction with the bearing unit can provide smooth rotation of the chuck unit relative to the hydraulic cylinder unit.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same numerals.

Referring to Fig. 1 to Fig. 3, a first embodiment of the new built-in hydraulic chuck 100 is suitable for being installed on a machine head 1. Main shaft 102 and a power source 103 (see FIG. 5 ) that can drive the main shaft 102 to rotate. The built-in hydraulic chuck 100 includes a hydraulic cylinder unit 10 , a chuck unit 20 and a bearing unit 30 .

The hydraulic cylinder unit 10 includes a side cover 11 fixed to the main shaft seat 101 and fixed relative to the main shaft 102, a hollow cylindrical cover 12 fixed to the side cover 11, a L is arranged and installed in the cylinder 13 inside the enclosure 12 , and a mandrel 14 installed in the cylinder 13 . The side cover 11 has a first oil hole 111 and a second oil hole 112. The cylinder block 13 has a cylinder chamber 131 communicated with the first oil hole 111, and a cylinder chamber 131 communicated with the cylinder chamber 131 and the second oil hole 112. The oil passage 132 of the two oil holes 112, the spindle member 14 has a piston ring 141 arranged in the cylinder chamber 131, and an extension 142 arranged on one side of the piston ring 141, the extension 142 has a plurality of surrounding The axis L is provided with screw holes 143 equiangularly spaced. The piston ring 141 is affected by the pressure oil introduced from the first oil hole 111 or the second oil hole 112, and can be moved along the axis L relative to the cylinder chamber 131. Switching between a first position (see FIG. 3 ) and a second position (see FIG. 6 ).

The chuck unit 20 is rotatable relative to the hydraulic cylinder unit 10 by being linked by the main shaft 102, and includes a chuck body 21 connected to the main shaft 102, a ring mounted on the chuck body 21 and around the axis L. Shaped end cap group 22, most of the clamping jaw groups 23 installed on the chuck body 21 and slidable along a radial direction perpendicular to the axis L, and most connected to the end cap group 22 and corresponding to the clips respectively The linkage group 24 of the jaw group 23 . One end of the collet body 21 passes through the mandrel 14 , and the other end of the collet body 21 has three sliding grooves 211 equiangularly spaced. The end cover set 22 has a side end cover 221 located on one side of the cylinder body 13, and a bearing cover 222 locked with the side end cover 221, the side end cover 221 and the bearing cover 222 jointly define an opening The annular groove 223 faces the extension portion 142 . With reference to FIG. 4 , each jaw set 23 has a main claw block 231 slidably inserted in the corresponding chute 211 , and a raw claw block 232 that is adjustably mounted on the main claw block 231 . The claw block 231 has a dovetail groove 233 and a first slope 234 disposed at the bottom of the dovetail groove 233 . Each linkage group 24 has a connecting plate 241 connected to the bearing cover 222, and a push block 242 connected to the connecting plate 241. With reference to FIG. 4, the push block 242 has a The dovetail boss 243 in the groove 233, and a second inclined surface 244 that is arranged on the top of the dovetail boss 243 and fits with the first inclined surface 234, the linkage groups 24 are supported by the spindle member 14, the bearing unit 30 . The movement of the end cap set 22 along the axis L can be linked to the movement of the corresponding jaw set 23 in the radial direction.

The bearing unit 30 is installed between the hydraulic cylinder unit 10 and the chuck unit 20, and is located between the cylinder chamber 131 and the jaw sets 23, the bearing unit 30 is embedded in the ring groove 223, the clamp When the head unit 20 rotates relative to the hydraulic cylinder unit 10 , the bearing unit 30 provides smooth rotation of the chuck unit 20 relative to the hydraulic cylinder unit 10 . The bearing unit 30 of this embodiment has a plurality of roller bearings 31, and each roller bearing 31 has a locking rod 311 screwed in the screw hole 143 of the spindle member 14, and an inner ring fixed on the locking rod 311 Ring 312 , an outer ring 313 in line contact with the side end cover 221 and the bearing cover 222 , and a plurality of rollers 314 arranged between the inner ring 312 and the outer ring 313 .

In order to further understand the functions produced by the coordination of the various components of the present invention, the use of technical means, and the expected effects, it will be explained as follows. It is believed that the present invention can be understood more deeply and specifically.

As shown in Fig. 3 and Fig. 5, the built-in hydraulic chuck 100 of the present invention is installed on the main shaft seat 101 of the machine head 1, and the hydraulic cylinder unit 10, the chuck unit 20 and the bearing unit 30 have been Assembly is complete.

As shown in Figure 3, when the pressure oil is injected from the second oil hole 112 and introduced into the cylinder chamber 131 through the oil passage 132 (as shown by the dashed arrow in Figure 3), the piston ring of the spindle member 14 141 will be pushed by the pressure oil and move toward the left side of Fig. 3 (as shown by the solid line arrow corresponding to the spindle part 14 in Fig. 3), the leftward movement of the spindle part 14 will link the bearing unit 30, the The end cover group 22 and the interlocking groups 24 also move to the left, and utilize the mutual nesting effect of the dovetail grooves 233 and the dovetail bosses 243, and the abutment between the first inclined surfaces 234 and the second inclined surfaces 244. As a result of the combination, the linkage groups 24 will also move the corresponding jaw groups 23 in the radial direction. Figure 3 shows that the jaw groups 23 approach the axis L at the same time (as shown in the dot chain line in Figure 3 Arrows), and the jaw sets 23 clamp a workpiece (not shown).

As shown in Figure 5, when the power source 103 is activated, the main shaft 102 and the chuck unit 20 can be driven to rotate relative to the hydraulic cylinder unit 10 and the bearing unit 30, and the end cover group 22 is relatively When the roller bearings 31 rotate, the bearing unit 30 provides smooth rotation of the chuck unit 20 relative to the hydraulic cylinder unit 10 .

As shown in Figure 6, when the pressure oil is injected into the cylinder chamber 131 from the first oil hole 111 (as shown by the dotted arrow in Figure 6), the piston ring 141 of the spindle member 14 will be pushed by the pressure oil toward The right side of Fig. 6 moves (as shown by the solid line arrow corresponding to the mandrel 14 in Fig. 6), the rightward movement of the mandrel 14 will interlock the bearing unit 30, the end cover group 22 and the interlocking Group 24 also moves to the right, and utilizes the effect that these dovetail grooves 233 and these dovetail bosses 243 are mutually nested, and the effect that these first slopes 234 fit with these second slopes 244, these linkage groups 24 will also move the corresponding jaw sets 23 in the radial direction. It is shown in FIG. The claw set 23 releases the workpiece (not shown).

Therefore, the effect that the present invention can produce is summarized as follows:

1. Reciprocating motion: the roller bearings 31 of the bearing unit 30 are evenly distributed around the axis L, and the side end cover 221 and the bearing cover 222 are respectively used to bear against the outer rings of the roller bearings 31 The ring 313 enables the pushing force of the hydraulic cylinder unit 10 to be transmitted to the pushing blocks 242 in a balanced manner, so as to complete the clamping or loosening of the workpiece.

2. Rotational movement: when the chuck unit 20 rotates, the hydraulic cylinder unit 10 and the bearing unit 30 are fixed and do not rotate. At this time, the outer rings 313 of the roller bearings 31 and the side end covers 221, The bearing cap 222 leans against to allow the chuck unit 20 to rotate more smoothly as a whole.

3. There is no need to set a tie rod, the overall assembly is simple and the volume is small, and it does not take up space.

As shown in Fig. 7, the difference between the second embodiment of the new built-in hydraulic chuck 100' and the first embodiment is only that the extension part 142' of the mandrel 14' is in a step shape, It also has a large diameter section 143', a small diameter section 144', a shoulder 145' between the large diameter section 143' and the small diameter section 144', and the mandrel part 14' also has a fixed on The stop ring 146' of the small diameter section 144', the bearing unit 30' is a thrust bearing, and has a small diameter section 144' installed on the spindle member 14' and is located between the stop ring 146' and the shoulder 145 The inner ring 312' between ', the outer ring 313' set in the ring groove 223 of the end cover group 22, and most of them are arranged between the inner ring 312' and the outer ring 313' roller 314'. The second embodiment can also achieve the same purpose and effect as the first embodiment.

As shown in Figure 8 again, a third embodiment of the new built-in hydraulic chuck 100" is similar to the second embodiment, the extension 142" of the mandrel 14" is stepped, and has a large Diameter section 143", a small diameter section 144", a shoulder 145" between the large diameter section 143" and the small diameter section 144", the mandrel part 14" also has a 144" stop ring 146", and the only difference from the second embodiment is: the bearing unit 30" is a self-lubricating bearing, and the inner edge is located at the small diameter between the stop ring 146" and the shoulder 145" Segment 144", the outer edge of which is sleeved in the annular groove 223 of the end cover set 22. The third embodiment can also achieve the same purpose and effect as the first and second embodiments.

To sum up, the built-in hydraulic chuck of the present invention is simple in overall assembly, small in size, and does not take up space, and the chuck unit rotates smoothly and stably, which can indeed achieve the purpose of the present invention.

But the above-mentioned person is only the embodiment of the present invention, should not limit the scope of implementation of the present invention with this, all simple equivalent changes and modifications done according to the patent scope of the present application and the content of the patent specification are all still within the scope of the present invention. Within the scope covered by this patent.

1: Machine head 101: Spindle seat 102:Spindle 103: power source 100: Built-in hydraulic chuck 10: Hydraulic cylinder unit 11: side cover 111: The first oil hole 112: Second oil hole 12: Enclosure 13: Cylinder 131: cylinder chamber 132: oil circuit 14: mandrel piece 141:piston ring 142: Extension 143: screw hole 20: chuck unit 21: chuck body 211: Chute 22: End cover group 221: side end cover 222: Bearing cap 223: ring groove 23: Gripper group 231: main claw block 232: raw claw block 233: dovetail groove 234: first bevel 24: linkage group 241: Connection board 242: push block 243: Dovetail Boss 244: second slope 30: Bearing unit 31: Roller bearing 311:Lock lever 312: inner ring 313: outer ring 314: roller 100' : Built-in hydraulic chuck 14' : Mandrel piece 142' : Extension 143' : large diameter section 144' : small diameter section 145' : Shoulder 146' : retaining ring 30' : Bearing unit 312' : inner ring 313' : outer ring 314' : Roller 14” : Mandrel piece 142” : Extension 143” : large diameter section 144” : small diameter section 145” : Shoulder 146” : retaining ring 30” : Bearing unit L: axis

Other features and effects of the present invention will be clearly presented in the implementation manner with reference to the drawings, wherein: Fig. 1 is a three-dimensional installation schematic diagram of a first embodiment of the new built-in hydraulic chuck; Fig. 2 is a three-dimensional exploded view of the first embodiment; Fig. 3 is a combined cross-sectional schematic view of the first embodiment, illustrating a clamping schematic; Fig. 4 is a sectional view along the line IV-IV in Fig. 3; Fig. 5 is a schematic diagram of a rotating action in Fig. 3; Fig. 6 is a schematic diagram of a relaxation action of the first embodiment; Fig. 7 is a combined sectional schematic view of a second implementation of the new type built-in hydraulic chuck of the present invention; and Fig. 8 is a combined cross-sectional schematic view of a third implementation of the new built-in hydraulic chuck of the present invention.

1: Machine head

101: Spindle seat

100: Built-in hydraulic chuck

10: Hydraulic cylinder unit

11: side cover

111: The first oil hole

112: Second oil hole

12: Enclosure

13: Cylinder

131: cylinder chamber

132: oil circuit

14: mandrel piece

141:piston ring

142: Extension

143: screw hole

20: chuck unit

21: chuck body

211: Chute

22: End cover group

221: side end cover

222: Bearing cap

23: Gripper group

231: main claw block

232: raw claw block

233: dovetail groove

234: first bevel

24: linkage group

241: Connection board

242: push block

243: second slope

244: second slope

30: Bearing unit

31: Roller bearing

L: axis

Claims (6)

A built-in hydraulic chuck, comprising: a hydraulic cylinder unit, including a cylinder body arranged along an axis, and a mandrel installed inside the cylinder body, the cylinder body has a cylinder chamber, the core The shaft member has a piston ring arranged in the cylinder chamber, and the piston ring can be converted between a first position and a second position relative to the cylinder chamber along the axis under the action of oil pressure; a chuck unit can It rotates relative to the hydraulic cylinder unit, and includes a chuck body, a ring-shaped end cover set mounted on the chuck body and around the axis, most of which are installed on the chuck body and can be along a direction perpendicular to the axis The set of radially sliding jaws, and a plurality of linkage sets connected to the end cover set and respectively corresponding to the jaw sets, the end cover set defines an annular groove, and each jaw set has a first slope, Each linkage group has a second slope that fits with the first slope. These linkage groups are moved by the spindle along the axis, and can be linked to the corresponding jaw group to move in the radial direction; a bearing unit , installed between the hydraulic cylinder unit and the chuck unit, and between the cylinder chamber and the jaw sets, the bearing unit embedded in the ring groove, the chuck unit relative to the hydraulic cylinder unit When rotating, the bearing unit provides smooth rotation of the collet unit relative to the hydraulic cylinder unit. The built-in hydraulic chuck as claimed in claim 1, wherein the end cover set of the chuck unit has a side end cover and a bearing cover locked with the side end cover, and the side end cover is locked with the side end cover The bearing caps jointly define the ring groove. The built-in hydraulic chuck as described in claim 2, wherein each jaw set also has a main jaw block slidably inserted in the chuck body, and an adjustable The raw claw block installed neatly on the main claw block, the main claw block has a dovetail groove, the first slope is arranged at the bottom of the dovetail groove, each linkage group also has a connecting plate connected to the bearing cover, and a The push block connected to the connecting plate has a dovetail boss, and the second slope is arranged on the top of the dovetail boss. The built-in hydraulic chuck as claimed in claim 3, wherein the bearing unit has a plurality of roller bearings, and each roller bearing has a lock rod installed on the spindle member and located on one side of the piston ring, An inner ring fixed on the locking rod, an outer ring in line contact with the side end cover and the bearing cover, and a plurality of rollers arranged between the inner ring and the outer ring. The built-in hydraulic chuck as described in claim 3, wherein the bearing unit is a thrust bearing, and has an inner ring mounted on the spindle member and located on the side of the piston ring, and an inner ring that is nested in the The outer ring of the ring groove, and a plurality of rollers arranged between the inner ring and the outer ring. The built-in hydraulic chuck as claimed in claim 3, wherein the bearing unit is a self-lubricating bearing installed on the spindle member and located at the side of the piston ring.

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