TWI645925B - Front-mounted hydraulic chuck - Google Patents

Abstract

A front-mounted hydraulic collet comprises: a ring seat, a chuck body, a hydraulic unit and a second pressure maintaining valve, wherein the chuck body has a hydraulic unit built therein, so that the other end of the processing machine is not An additional hydraulic structure is required to provide the displacement force for clamping and loosening of the chuck body, and the other end of the processing machine can be equipped with another hydraulic chuck to achieve the structure of the double chuck processing machine, and the chuck system The first slot and the second slot are symmetrically arranged, and a pressure maintaining valve is respectively assembled. When the chuck body performs the clamping and loosening of the workpiece, the pressure relief backflow is performed through the two pressure maintaining valves. The oil balance between the chuck body and the ring seat is achieved, and the unilateral pressure is greatly reduced and the deformation is suspected, thereby improving the service life of the structure.

Description

 Front-mounted hydraulic chuck  

The present invention relates to a collet structure, and more particularly to a front type hydraulic collet.

According to the chuck, the chuck is a necessary tool for clamping and fixing work during machining of a general lathe machine. Because it is used to hold the workpiece during machining, it is used as a tool for machining operations, and the locking tool is processed in recent years. The smooth safety and rapid control of the operation usually consist of a pipeline with a pneumatic pressure inside, which controls the internal jaw block to displace and hold the workpiece, but the pneumatic chuck structure is stopped at the chuck. When the pressure is applied, the pressure is not applied to the holding state only through the pressure-holding structure, and the airtight pressure is maintained through the internal O-ring. Therefore, when the chuck body is rotated with the workpiece, the O-ring is formed. The aging, fatigue, leaking pressure loss situation, or the O-ring assembly accuracy affects the pressure holding effect, resulting in the clamping stability will continue to decrease due to the running time, making the workpiece clamping more unstable, the operation There are risks in the process, and the lighter affects the processing quality, resulting in a decrease in precision. In severe cases, it is more likely that the workpiece will fly out and there is accidental injury, which is extremely dangerous and lacks safety.

In view of this, the inventors have been engaged in the manufacturing development and design experience of related products for many years, and after detailed design and careful evaluation of the above objectives, the present invention has finally become practical.

The technical problem to be solved by the present invention is to provide a front-mounted hydraulic collet for the above-mentioned drawbacks existing in the prior art.

A front-mounted hydraulic collet comprises: a ring seat, a chuck body, a hydraulic unit and a second pressure maintaining valve, wherein a ring convex portion is arranged at the center of the inner diameter of the ring seat, and the ring convex portion is A combination groove portion with a continuous step shape is arranged on the two sides of the ring, and a first oil transfer groove and a second oil transfer groove are arranged on the end face ring of the ring convex portion, and the combined groove portions on both sides of the ring convex portion are sequentially provided. a two-ring bearing and a two-oil seal, one end of the ring seat is axially disposed with a collet body, and the other end is provided with a rear abutment and the ring seat are simultaneously connected to the collet body, and finally the ring seat is An outer sealing ring is respectively fixed on the outermost side of the second outer ring, and a first oil inlet hole is communicated with the first oil conveying groove, a second oil inlet hole is communicated with the second oil conveying groove, and a second oil inlet hole is communicated with the second oil conveying groove, and The oil return hole is disposed at an end of the ring seat and axially penetrates an oil spill groove to communicate with the oil return hole, and passes through the oil spill groove for discharging oil accumulated between the two annular bearings, and the center of the chuck body is The penetrating portion has a chamber, and the front portion of the chamber is provided with a sliding ring seat, and the sliding ring seat is provided with a plurality of inclined edges The guide groove is provided for sliding a plurality of sliders combined with the jaws, and an aliquot of the sliding groove is arranged at the front end of the chuck body, and the sliders are sequentially disposed, and an oil is formed in the rear portion of the chamber. a chamber for mounting a hydraulic unit and the sliding ring seat, and a first oil supply hole and a second oil supply hole are further disposed on the oil inlet inner wall, and the front end surface of the chuck body is axially disposed The first slot is provided with a first slot and a second slot, and a pressure maintaining valve is respectively assembled. The bottom of the first slot is provided with a first cut throttle, and the first cut throttle is connected to the other end. The first slot is further provided with a first inlet and outlet oil passage and a first intake oil passage, and the first inlet and outlet oil passages are disposed at the other end. The outer side of one of the chuck bodies is in communication with the first oil transfer tank, and the first push oil passage is connected to the first oil supply hole of the oil inlet chamber, and the bottom of the second slot is also provided with a second oil control oil. The second cut-off oil passage is connected to the outer side of the chuck body and communicates with the first oil-transporting tank, and the second slot is further provided. a second inlet and outlet oil passage and a second suction oil passage, the other end of the second inlet and outlet oil passage is connected to one of the outer sides of the chuck body and is in communication with the second oil feed tank, and the second oil intake passage is connected with The second oil supply hole of the oil inlet chamber is connected to the oil supply unit, and the oil pressure unit comprises a linkage sleeve, a connecting ring, a limiting ring and a piston seat, and the linking sleeve is engaged with the connecting ring system and is reused. The bolt is coupled to the sliding ring seat, and a middle portion of the cavity is provided with a concave portion of the internal thread segment for locking to limit the limiting ring, and the center of the limiting ring is formed with a permanent perforation The sliding sleeve is provided with a piston seat, the outer diameter of the piston seat is sleeved with an O-ring and slides along the wall of the oil inlet chamber, and two hollow front sleeve portions and a rear sleeve portion are protruded from the center to the both sides, the front sleeve The connecting portion is connected to the linking sleeve through the through hole of the limiting ring, and the rear socket portion is disposed opposite to the abutting seat of the ring seat, and the rear seat and the limiting ring define the ingress through the rear seat The oil chamber further positions the piston seat between the first and second supply oil holes, and the two pressure maintaining valves are all provided with a hollow The chamber is further provided with a first oil inlet groove and a second oil inlet groove communicating with the hollow groove chamber, and a steel ball and a spring are disposed in the hollow chamber, and one port of the two pressure maintaining valve is a pusher group Inserting into the hollow chamber against the steel ball, and respectively passing through the first cutting oil passage of the first slot and the second cutting oil passage of the second slot, the oil input shifts the pushing member inward, and the steel ball is retracted And the first and second inlet oil tanks are connected, and the first oil inlet groove of the two pressure maintaining valves is respectively connected with the first and second inlet and outlet oil passages, and the second oil inlet groove of the second pressure maintaining valve is the first The second push-receiving oil passage is connected, and another port of the second pressure-retaining valve is provided with a cover, and finally a lock cover is respectively locked to the first and second slot ports, thereby respectively limiting the two pressure-retaining valves to In the first and second slots, by the above structure, the crucible is configured to constitute a front-mounted hydraulic collet.

(1) The hydraulic head unit is built in the body of the chuck, so that the other end of the processing machine does not need to be additionally equipped with a hydraulic structure to provide the displacement power of the chuck body to be clamped and relaxed, and the other end of the processing machine can be Adding another hydraulic chuck to achieve the structure of the double chuck, not only can the long workpiece be clamped by the double chuck to improve the stability, and the roundness of the processing, but also the workpiece can be clamped through the double chuck at the same time. Processing to improve processing efficiency.

(2) The hydraulic collet of the present invention is capable of continuously applying pressure during operation, so that when the collet body is rotated, the clamping stability of the collet body is ensured by continuous input of pressure, and the turbulent oil passes through the When the first and second oil tanks are transported, the turbulent oil will flow to the annular bearings on both sides through the gap formed between the ring seat and the chuck body, thereby providing lubrication effect of the annular bearing, so that the chuck body can be applied to The high-speed processing is used, and the two annular bearings and the oil return hole are connected to each other to be provided with an oil spill groove, so that the turbulent oil flowing into the annular bearing can be discharged from the oil return hole through the oil spill tank to reach the crucible. The rotation of the moving oil is cooled, and at the same time, it has an oil-cooled running state, which greatly reduces the doubt of overheating deformation during the operation of the chuck body, and improves the processing efficiency and the use time limit.

(3) The chuck system is symmetrically provided with a first slot and a second slot, and is respectively assembled with a pressure maintaining valve. When the chuck body is clamped and relaxed by the workpiece, the second pressure is maintained. The pressure relief of the valve in one out and one out reaches the balance of the oil path between the body of the chuck and the ring seat, greatly reducing the unilateral pressure and the doubt of the deformation, and improving the service life of the structure.

(4) When the chuck body is clamped by the workpiece, since the turbulent oil is poured into the oil inlet chamber through the first oil supply hole, the turbulent oil between the piston seat and the rear abutment is simultaneously discharged, so that The piston seat can be displaced into the clamping direction in the backward direction, which greatly increases the clamping force of the structure and increases the precision of the workpiece processing.

(5) When the power is cut off during the process, although the turbulent oil can no longer be input, but the turbulent oil is to enter the hollow chamber through the second oil inlet of the pressure maintaining valve, the steel ball is pushed by the non-pushing member. In this case, the steel ball is pushed by the spring to make the first and second oil grooves form unconnected, so that the turbulent oil can not be recirculated, and the pressure maintaining effect is obtained, so that the chuck body can surely clamp the workpiece and avoid the workpiece. Flying out of doubts to ensure the safety of structural processing.

10‧‧‧ ring seat

11‧‧‧ ring convex

12‧‧‧ Combination groove

111‧‧‧The first oil tank

112‧‧‧Second oil tank

13‧‧‧Circular bearing

14‧‧‧ oil seal

Arrived after 15‧‧

151‧‧‧Interface

152‧‧‧With holes

16‧‧‧Outer ring

17‧‧‧First oil inlet

18‧‧‧Second oil inlet

19‧‧‧ oil return hole

191‧‧‧ Oil spill tank

20‧‧‧ chuck body

21‧‧‧ chamber

211‧‧‧ concave part

22‧‧‧Sliding ring seat

221‧‧‧ oblique cone guide

222‧‧‧ wearing a hole

23‧‧‧ Slider

231‧‧‧claw

24‧‧ ‧ chute

25‧‧‧Connecting sleeve

26‧‧‧Into the oil room

261‧‧‧First oil supply hole

262‧‧‧Second oil supply hole

27‧‧‧First slot

271‧‧‧The first cut oil channel

272‧‧‧First access and oil passage

273‧‧‧First push the oil channel

28‧‧‧Second slot

281‧‧‧Second cut oil channel

282‧‧‧Second inlet and outlet

283‧‧‧Second push oil channel

30‧‧‧Hydraulic unit

31‧‧‧ linkage sleeve

32‧‧‧Connecting ring

33‧‧‧ Limit ring

331‧‧‧through holes

34‧‧‧ piston seat

341‧‧‧Front Sockets

342‧‧‧ rear socket

40‧‧pressure retaining valve

41‧‧‧ hollow chamber

42‧‧‧First oil tank

43‧‧‧Second oil tank

44‧‧‧ steel balls

45‧‧‧ Spring

46‧‧‧Parts

47‧‧‧ Cover

48‧‧‧Lock cover

Fig. 1 is a perspective view of the present invention.

Fig. 2 is an exploded view of the ring seat of the present invention.

Fig. 3 is an exploded view of the chuck body and the hydraulic unit of the present invention.

Fig. 4 is a perspective view of the chuck body of the present invention.

Figure 5 is a front view of the collet body of the present invention.

Fig. 6 is a cross-sectional view showing a line taken along line A-A of Fig. 5 of the present invention.

Fig. 7 is a cross-sectional view showing a line taken along line B-B of Fig. 5 of the present invention.

Figure 8 is an exploded view of the pressure holding valve of the present invention.

Figure 9 is a front view of the combination of the present invention.

Fig. 10 is a cross-sectional view corresponding to the line C-C of Fig. 9 of the present invention, and a schematic view of the turbulent oil being input to the first oil feed tank through the first oil inlet hole.

Figure 11 is a cross-sectional view of the present invention corresponding to the line D-D of Figure 9, and a schematic diagram of the pressure-retaining valve in the first slot through the first oil delivery tank and the first inlet and outlet oil passage.

Figure 12 is a cross-sectional view of the present invention corresponding to the line E-E of Figure 9, and a schematic view of the turbulent oil entering the oil inlet chamber through the first push oil passage and the first oil supply hole.

Figure 13 is a cross-sectional view of the present invention corresponding to the line F-F of Fig. 9 and a schematic diagram of the swaying oil passing through the second cut-and-control oil passage to push the pushing member in the second slot to form the pressure-keeping valve oil passage.

Figure 14 is a cross-sectional view corresponding to the line G-G of Fig. 9 of the present invention, and a schematic view of the residual oil being discharged from the second oil supply hole and passing through the second push oil passage into the pressure maintaining valve located in the second slot.

Figure 15 is a cross-sectional view of the H-H line corresponding to Figure 9 of the present invention and a schematic diagram of the residual oil running back to the second oil passage through the first inlet and outlet.

Figure 16 is a cross-sectional view corresponding to the line C-C of Figure 9 of the present invention and a schematic diagram of the input of turbulent oil through the second oil inlet hole to the second oil transfer tank.

Figure 17 is a cross-sectional view of the H-H line corresponding to Figure 9 of the present invention, and a schematic view of the pressure-retaining valve located in the second slot through the second oil feed tank and the second inlet and outlet oil passage.

Figure 18 is a cross-sectional view of the G-G line corresponding to Figure 9 of the present invention and a schematic view of the turbulent oil entering the oil inlet chamber through the first push oil passage and the first oil supply hole.

Figure 19 is a cross-sectional view of the present invention corresponding to the line I-I of Figure 9, and the schematic diagram of the turbulent oil passing through the first cutting oil passage to push the pushing member in the first slot to form the pressure maintaining valve oil passage.

Figure 20 is a cross-sectional view corresponding to the line E-E of Figure 9 of the present invention, and a schematic view of the residual oil being discharged from the first oil supply hole and entering the pressure maintaining valve located in the first slot through the first push oil passage.

Fig. 21 is a cross-sectional view corresponding to the line D-D of Fig. 9 of the present invention and a schematic diagram of the residual oil running back to the first oil passage through the first inlet and outlet.

In order to enable your review committee to have a better understanding and understanding of the purpose, features and effects of the present invention, please follow the [simplified description of the drawings] as follows: First, please refer to the first, second, and third figures. 4 to 7 and 8 , a front-mounted hydraulic collet comprising: a ring seat 10 , a collet body 20 , a hydraulic unit 30 and a second pressure maintaining valve 40 , wherein the ring A ring protrusion 11 is disposed at the center of the inner diameter of the seat 10, and a combination groove portion 12 having a continuous step shape is disposed on the two sides of the ring protrusion portion 11. The first oil groove 111 is formed on the end surface of the ring protrusion portion 11. And a second oil transfer groove 112, and two annular bearings 13 and two oil seals 14 are sequentially disposed by the combined groove portions 12 on both sides of the annular convex portion 11, and the inner diameter of the two annular bearings 13 is the same as the end surface of the annular convex portion 11 The inner end surface of the two oil seals 14 is higher than the end surface of the combination groove portion 12 for providing the annular bearing 13. One end of the ring seat 10 is axially disposed with a chuck body 20, and the other end is provided with a rear end. The abutment 15 is coupled to the collet body 20 at the same time as the ring seat 10, and finally an outer seal is respectively fixed by the outermost sides of the ring seat 10 16. The outer surface of the ring seat 10 is provided with a first oil inlet hole 17 communicating with the first oil delivery groove 111, a second oil inlet hole 18 communicating with the second oil delivery groove 112, and an oil return hole 19 Further, an oil spill groove 191 is axially disposed at one end of the ring seat 10 to communicate with the oil return hole 19, and is passed through the oil spill groove 191 for discharging oil accumulated between the two annular bearings 13, the chuck body 20 The central portion has a cavity 21 in a penetrating manner. The front portion of the chamber 21 is provided with a sliding ring seat 22, and the outer periphery of the sliding ring seat 22 is provided with a plurality of inclined cone guiding grooves 221 for a plurality of combined clips. The slider 23 of the claw 231 is slidably mounted, and the sliding groove 24 is equally disposed at the front end of the chuck body 20, and the sliders 23 are sequentially disposed, and the sliding ring seat 22 has a through hole 222 in the center. The chuck body 20 is extended from the front end of the connecting sleeve 25 into the chamber 21 for the sliding ring seat 22 to be sleeved and restricted by the sleeve hole 222, and the rear portion of the chamber 21 forms an oil inlet chamber 26. For the purpose of installing a hydraulic unit 30 in conjunction with the sliding ring seat 22, a first oil supply hole 261 and a second oil supply hole 262 are further disposed on the inner wall of the oil inlet chamber 26, and The front end surface of the chuck body 20 is axially disposed with one of the first slot holes 27 and the second slot hole 28, and is respectively assembled into a pressure maintaining valve 40. The first slot hole 27 is provided with a first bottom portion. The first oil-cutting channel 271 is connected to the outer side of the chuck body 20 and communicates with the second oil-transporting tank 112. The first slot 27 is further provided with a first inlet and outlet oil passage 272. a first intake oil passage 273, the other end of the first inlet and outlet oil passage 272 is connected to one of the outer sides of the chuck body 20 to be in communication with the first oil feed slot 111, and the first push oil passage 273 is connected to The first oil supply hole 261 of the oil chamber 26 is in communication with each other. The bottom of the second slot 28 is also provided with a second cutting oil passage 281. The second cutting oil passage 281 is disposed at the other end to the outside of the chuck body 20. The second slot 28 is further provided with a second inlet and outlet oil passage 282 and a second intake oil passage 283. The second inlet and outlet oil passage 282 is connected to the chuck at the other end. One of the outer sides of the body 20 is in communication with the second oil feed slot 112, and the second push oil passage 283 is in communication with the second oil supply hole 262 of the oil inlet chamber 26. The hydraulic unit 30 includes a connection. The movable sleeve 31, a connecting ring 32, a limiting ring 33 and a piston seat 34, the connecting sleeve 31 is engaged with the connecting ring 32, and the connecting ring 32 and the sliding ring seat are further bolted The locking portion of the chamber 21 is provided with a concave portion 211 of the internal thread portion for locking the limiting ring 33. The central portion of the limiting ring 33 is formed with a continuous through hole 331 and is slidably disposed. a piston seat 34, the outer diameter of the piston seat 34 is sleeved with an O-ring and slides along the inner wall of the oil inlet chamber 26, and two hollow front sleeve portions 341 and a rear socket portion 342 are protruded to the sides at the center. The front sleeve portion 341 is screwed and fixed to the interlocking sleeve 31 through the through hole 331 of the limiting ring 33, and the rear socket portion 342 is disposed opposite the seat 15 of the ring seat 10, An engaging portion 151 is formed in the center of the rear seat 15 and is fixedly connected to the end opening of the chuck body 20, and a through hole 152 is defined in the center of the engaging portion 151 for the piston seat 34 to be socketed. The insertion portion 342 has a limit, and the outer diameter of the engaging portion 151 and the rear sleeve portion 342 are sleeved with an O-ring, and the rear seat 15 and the limiting ring 33 are defined by the rear seat 15 In the oil inlet chamber 26, please refer to the figures 12 and 14 at the same time, and further, the piston seat 34 is located between the first and second supply oil holes 261, 262, and the two pressure maintaining valves 40 are all provided with a hollow groove. The chamber 41 is further provided with a first oil inlet 42 and a second oil inlet 43 communicating with the hollow chamber 41. Further, a hollow ball 44 and a spring 45 are disposed in the hollow chamber 41, and the two pressure maintaining valves 40 are disposed. A port is formed by a pushing member 46 into the hollow groove chamber 41 and abutting the steel ball 44, and respectively passing through the first cutting oil passage 271 of the first slot hole 27 and the second cutting oil of the second slot hole 28 The passage 281 shifts the oil input to the pushing member 46 to be displaced inwardly, so that the steel ball 44 is retracted to reach the communication between the first and second oil grooves 42, 43, and the first oil inlet groove 42 of the second pressure maintaining valve 40 is respectively The first and second oil inlet passages 272 and 282 are in communication, and the second oil inlet groove 43 of the second pressure maintaining valve 40 is in communication with the first and second oil receiving passages 273 and 283, and the second pressure maintaining valve 40 is further connected. A port is provided with a cover 47, and finally is locked to the first and second slots 27 and 28 by a lock cover 48, thereby limiting the two pressure maintaining valves 40 to the first and second slots, respectively. Inside the holes 27, 28.

For the structure of the structure, as shown in FIGS. 1 to 8, the chuck body 20 is assembled into a slider 23 equipped with a jaw 231 by a plurality of equally divided chutes 24, and then the chuck body is assembled. The chamber 21 of the sliding chamber 21 is slidably disposed with a sliding ring seat 22 and passes through the inclined tapered guiding groove 221 at the periphery of the sliding ring seat 22 for the engagement of the sliders 23, and the sliding of the sliding ring seat 22 in the chamber 21 Actuating, and then using each of the inclined cone guides 221 to guide the sliding members 23 to perform the sliding control of the tensioning, so as to achieve the synchronous clamping and clamping work or the release clamping operation of the locking group integrated jaws 231, the hydraulic unit The 30 series firstly engages the interlocking sleeve 31 and the connecting ring 32, and then the connecting ring 32 and the sliding ring seat 22 are fixed by bolts. The limiting ring 33 is locked in the cavity 21 The insert portion 211 is connected to the interlocking sleeve 31 before the piston seat 34 is provided with the through hole 331, and the first and second slots 27 and 28 of the front end of the chuck body 20 are respectively assembled. a pressure maintaining valve 40, one end of the two pressure maintaining valve 40 is assembled into the hollow chamber 41, and a pushing member 46 is disposed, and the pushing member 46 ends with the first and second slots 27 and 28 The first and second switching oil passages 271 and 281 are in communication, and the first oil inlet groove 42 around the two pressure maintaining valve 40 is respectively connected with the first and second inlet and outlet oil passages 272 and 282, and the second oil inlet groove 43 is respectively The first and second push oil passages 273 and 283 are in communication with each other, and a hollow ball 44 and a spring 45 are further assembled in the hollow chamber 41, and a cover 47 is provided at the other end of the second pressure maintaining valve 40 for The other end of the spring 45 abuts, so that the steel ball 44 is pushed forward by the spring 45, and the first and second oil grooves 42 and 43 are blocked. Finally, a lock cover 48 is respectively provided to lock the first and second. The ports 27 and 28 are respectively ported, and the two pressure maintaining valves 40 are respectively restricted to the first and second slots 27 and 28, and the chuck body 20 and the ring with the hydraulic unit 30 and the second pressure maintaining valve 40 are mounted. The ring 10 is assembled by an annular bearing 13 and an oil seal 14 respectively on both sides of the ring protrusion 11 , and the chuck body 20 is assembled into the ring seat 10 at one end, and the ring protrusion The portion 11 and the two annular bearings 13 are engaged with each other, and the first oil transfer groove 111 on the ring convex portion 11 and the first inlet and outlet oil passage 272 and the second side outside the chuck body 20 are respectively The oil guiding passages 281 communicate with each other, and the second oil conveying grooves 112 on the ring convex portion 11 respectively communicate with the first cutting oil passages 271 and the second inlet and outlet oil passages 282 outside the chuck body 20, and finally a rear seat 15 is mounted on the other side of the ring seat 10, and is fixedly fixed to the end port of the chuck body 20 by the engaging portion 151 at the center, and is inserted into the socket portion 342 after the piston seat 34 through the through hole 152, and then The piston seat 34 is slidably restrained between the retaining ring 33 and the rear abutment 15 by the front and rear sleeve portions 341 and 342 respectively, and a closed oil inlet chamber 26 is formed between the retaining ring 33 and the rear abutment 15 . And a first oil supply hole 261 and a second oil supply hole 262 are respectively disposed on the sliding end of the oil inlet chamber 26 opposite to the piston seat 34, and the first oil supply hole 261 is connected to the first oil delivery hole 261. 273 is communicated to the first slot 27, and the second oil supply hole 262 is communicated to the second slot 28 via the second push-up oil passage 283. With the above structure, a front-mounted hydraulic chuck is completed. .

For the actual use of the structure, please refer to Figure 9 for the 10th, 11th, and 12th drawings. The first and second inlet holes 17 and 18 of the ring seat 10 are respectively connected to a turbulent oil pipe. The oil hole 19 is connected to a return oil pipe. When the chuck body 20 is to be clamped by the workpiece, the turbulent oil is input from the first oil inlet hole 17, and then flows into the first oil transfer groove 111 to be diverted to the first oil inlet and outlet. The 272 and the second cut oil passage 281, wherein the turbulent oil flowing along the first inlet and outlet oil passage 272 is introduced into the first slot 27, and enters the hollow slot through the first oil inlet 42 of the pressure maintaining valve 40. The steel ball 44 is pushed in the chamber 41 and the spring 45 is compressed to make the first and second oil grooves 42 and 43 communicate with each other, so that the turbulent oil can flow out from the second oil inlet groove 43 and lead along the first thrust oil passage 273. An oil supply hole 261, which injects the turbulent oil into the oil chamber 26, pushes the piston seat 34 to slide back and forth in the direction of the seat 15, and simultaneously drives the sliding ring seat 22 to slide along the chamber 21 to make each slip The block 23 is retracted along the inclined cone guide groove 221 to achieve the action of clamping the workpiece by the jaw; and the simultaneous flow into the second cut throttle 281 Then, the second slot 28 is introduced. Please refer to FIG. 9 to match the figures 13, 14, and 15, and push the pushing member 46 at the end of the pressure maintaining valve 40, and then push through the pushing member 46. The steel ball 44 compresses the spring 45 to make the first and second oil grooves 42 and 43 of the pressure maintaining valve 40 communicate with each other. At this time, since the piston seat 34 is pushed by the swaying oil to move outward in the direction of the seat 15, the 俾 will simultaneously The turbulent oil originally flowing between the piston seat 34 and the rear abutment 15 is discharged through the second oil supply hole 262, and then flows into the pressure maintaining valve 40 in the second slot 28 along the second push oil passage 283, and then passes through The first and second inlet oil grooves 42, 43 communicate the turbulent oil to the second inlet and outlet oil passage 282 to the second oil delivery tank 112 to recover the turbulent oil.

Furthermore, when the chuck body 20 is to loosen the clamped workpiece, please refer to FIG. 9 to match the figures 16, 17, and 18, first stop the first oil inlet hole 17 to input the turbulent oil, and then The turbulent oil is input from the second oil inlet hole 18, and then flows into the second oil transfer tank 112 to be led to the second inlet and outlet oil passage 282 and the first cut oil passage 271, wherein the turbulent oil flowing along the second inlet and outlet oil passage 282 It is introduced into the second slot 28, and enters the hollow slot chamber 41 through the first oil inlet groove 42 of the pressure maintaining valve 40 to push the steel ball 44 and compress the spring 45 to make the first and second oil grooves 42, 43 communicate with each other. The turbulent oil is allowed to flow out from the second oil inlet groove 43 and is guided along the second push oil passage 283 to the second oil supply hole 262, thereby pouring the turbulent oil into the oil inlet chamber 26, pushing the piston seat 34 toward The sliding ring 33 is slidably displaced in the direction of the ring 33, and the sliding ring seat 22 is slidably moved along the chamber 21, so that the sliders 23 are displaced outward along the inclined cone guide 221 to achieve the action of the jaws to relax the workpiece; The turbulent oil flowing into the first cut oil passage 271 is introduced into the first slot 27, please also refer to Fig. 9 to match the figures 19, 20, 21, and The pushing member 46 is located at the end of the pressure maintaining valve 40, and furtherly pushes the steel ball 44 through the pushing member 46 and compresses the spring 45 to make the first and second oil grooves 42 and 43 of the pressure maintaining valve 40 communicate with each other. When the piston seat 34 is pushed outward by the swaying oil toward the limit ring 33, the turbulent oil originally flowing between the piston seat 34 and the limit ring 33 is discharged through the first oil supply hole 261, thereby The first push-up oil passage 273 flows into the pressure-retaining valve 40 in the first slot 27, and then passes through the first and second oil-intake tanks 42, 43 to pass the turbulent oil to the first inlet and outlet oil passage 272 to the first transmission. The oil tank 111 reaches the recovery of the turbulent oil.

Moreover, when the turbulent oil is transported through the first and second oil sumpes 111, 112, the turbulent oil flows simultaneously to the annular bearing 13 on both sides via the gap formed between the ring seat 10 and the chuck body 20, The lubricating effect of the annular bearing 13 makes the chuck body 20 suitable for high-speed machining, and the two annular bearing 13 and the oil return hole 19 are more in communication with the oil spill groove 191, please refer to the 10th. As shown in Fig. 16, the turbulent oil flowing between the annular bearings 13 is discharged from the oil return hole 19 through the oil spill groove 191, thereby achieving the cooling of the turbulent oil and the oil-cooled operation state. The problem of overheating deformation during the operation of the chuck body 20 is reduced, and the processing efficiency and the use time limit are improved.

In addition, the chuck body 20 has a hydraulic unit 30 built therein, so that the other end of the processing machine does not need to be additionally equipped with a hydraulic structure to provide displacement force for clamping and loosening of the chuck body 20, and the other machine can be processed. Another hydraulic chuck is installed at one end to achieve the structure of the double chuck processing machine, which can not only clamp the long workpiece through the double chuck to improve the stability, but also the roundness of the processing, and can also be clamped through the double chuck at the same time. The workpiece is processed to improve processing efficiency.

According to the structure of the above specific embodiment, the following benefits can be obtained: (1) The hydraulic collet of the present invention is continuously pressurized during operation, so that when the collet body 20 is rotated, the chuck is ensured by continuous input of pressure. The clamping stability of the main body 20 can also achieve the lubrication and cooling effects through the pulsating oil at the same time, greatly reducing the doubt that the chuck body 20 has overheat deformation during operation, and is more suitable for high-speed machining operations. In turn, the processing efficiency and the use time limit are improved.

(2) The chuck body 20 is symmetrically provided with a first slot 27 and a second slot 28, and is respectively assembled with a pressure maintaining valve 40. When the chuck body 20 performs clamping and loosening of the workpiece, Through the pressure relief backflow of the two pressure-retaining valve 40, the oil balance between the chuck body 20 and the ring seat 10 is achieved, and the pressure on the unilateral side is greatly reduced and the deformation is greatly improved, thereby improving the service life of the structure.

(3) When the chuck body 20 grips the workpiece, since the turbulent oil is poured into the oil inlet chamber 26 via the first oil supply hole 261, the turbulent oil between the piston seat 34 and the rear seat 15 is simultaneously It will be discharged, so that the piston seat 34 can be displaced in the direction of the seat 15 to the clamping state, thereby greatly increasing the clamping force of the structure and increasing the precision of the workpiece processing.

(4) In addition, when the power is cut off during the process, although the turbulent oil can no longer be input, but the turbulent oil is to enter the hollow chamber 41 via the second oil inlet 43 of the pressure maintaining valve 40, there is no push. When the member 46 pushes the steel ball 44, the steel ball 44 is pushed by the spring 45 to make the first and second oil grooves 42 and 43 form an unconnected shape, so that the turbulent oil cannot be recirculated, and the pressure maintaining effect is obtained. The body 20 can still hold the workpiece securely, avoiding the doubt that the workpiece is flying out, and ensuring the safety during structural processing.

In summary, the present invention has indeed achieved a breakthrough structural design, and has improved invention content, and at the same time, can achieve industrial utilization and progress, and the present invention is not found in any publication, but also novel, when In accordance with the provisions of the relevant laws and regulations of the Patent Law, the application for invention patents is filed according to law, and the examination authority of the bureau is required to grant legal patent rights.

The above is only a preferred embodiment of the present invention, and the scope of the present invention is not limited thereto; that is, the equivalent variations and modifications made by the scope of the present invention should still belong to the present invention. Within the scope of the patent.

Claims (5)

 A front-mounted hydraulic collet comprising: a ring seat having a ring protrusion at the center of the inner diameter of the ring seat, and a continuous groove-shaped combination groove portion on both sides of the ring protrusion portion A ring-shaped end face ring is provided with a first oil-transporting groove and a second oil-transporting groove, and then two annular bearings and two oil seals are sequentially arranged by the combined groove portions on both sides of the ring-shaped convex portion, and one end of the ring seat is axially pierced a collet body, the other end is provided with a rear abutment and the ring seat abutting the collet body, and finally an outer sealing ring is respectively fixed by the outermost side of the ring seat, and the outer ring is further The surface of the radial surface is provided with a first oil inlet hole communicating with the first oil transfer groove, a second oil inlet hole communicating with the second oil transfer groove, and an oil return hole, and an oil spill groove is axially disposed at one end of the ring seat. And communicating with the oil return hole, and passing through the oil spilling tank for discharging oil accumulated between the two annular bearings; a chuck body having a cavity in the center of the chuck body, the front portion of the chamber The utility model is provided with a sliding ring seat, and a plurality of inclined cone guiding grooves are arranged on the outer circumference of the sliding ring seat for a plurality of combined clamping jaws The block sliding installation is provided with an equally divided chute at the front end of the chuck body, and each slider is sequentially disposed, and an oil inlet chamber is formed in the rear portion of the chamber for mounting a hydraulic unit and the sliding ring. The joint is combined with a first oil supply hole and a second oil supply hole, and the front end surface of the chuck body is axially provided with one of the first slots and a first slot. The two slots are respectively formed into a pressure maintaining valve, and the bottom of the first slot is provided with a first cut oil passage, and the other end of the first cut oil passage is threaded to an outer side of the chuck body and the second oil tank The first slot is further provided with a first inlet and outlet oil passage and a first intake oil passage, and the other end of the first inlet and outlet oil passage is disposed to the outside of one of the chuck body and the first oil feed channel. Connected to the first oil receiving hole of the oil inlet chamber, the second oil guiding hole is also provided with a second cutting oil passage, and the second cutting oil passage is provided at the other end. An outer side of the collet body is in communication with the first oil transfer trough, and the second slot is further provided with a second inlet and outlet oil passage and a second push The second inlet and outlet oil passages are disposed at an outer side of one of the chuck bodies and are in communication with the second oil feed channel, and the second oil feed passage is in communication with the second oil supply hole of the oil inlet chamber; The pressure unit includes a linkage sleeve, an adapter ring, a limit ring and a piston seat. The linkage sleeve is engaged with the engagement ring system, and the adapter ring is slid with the bolt. The ring seat is coupled and coupled, and a middle portion of the chamber is provided with a concave portion of the internal thread segment for locking and restraining the limiting ring. The center of the limiting ring is formed with a continuous perforation and slidingly passes through a piston seat. The outer diameter of the piston seat is sleeved with an O-ring and slides along the wall of the oil inlet chamber, and two hollow front sleeve portions and a rear socket portion are protruded from the center to the both sides, and the front socket portion passes through the limit ring The through hole is connected with the interlocking sleeve, and the rear sleeve portion is disposed opposite to the abutting seat of the ring seat, and the oil receiving chamber is defined by the rear abutting seat and the limiting ring, and the piston seat is further Located between the first and second supply oil holes; the second pressure maintaining valve, the two pressure maintaining valves are all connected with a hollow chamber, and then The outer circumference is provided with a first oil inlet groove and the second oil inlet groove communicates with the hollow groove chamber, and a steel ball and a spring are disposed in the hollow groove chamber, and one port of the two pressure maintaining valve is assembled into the hollow groove chamber by a pushing member. Abutting the steel ball, and respectively passing through the first cutting oil passage of the first slot and the second cutting oil passage of the second slot, the oil input shifts the pushing member inward, so that the steel ball is retracted to reach the first And the second oil sump is connected, and the first oil inlet groove of the second pressure maintaining valve is respectively connected with the first and second inlet and outlet oil passages, and the second oil inlet groove of the second pressure maintaining valve is combined with the first and second oil inlet grooves. The oil passages are connected, and another port of the second pressure maintaining valve is provided with a cover, and finally the first and second slot ports are respectively locked by a lock cover, thereby limiting the two pressure maintaining valves to the first and second respectively. Inside the slot.    The front-mounted hydraulic collet according to claim 1, wherein the inner diameter of the two annular bearing is the same as the end surface of the annular convex portion, and the inner diameter end surface of the two oil seal is higher than the combined groove portion to provide a ring shape. The end face of the bearing.    The front-mounted hydraulic collet according to claim 1, wherein the interlocking sleeve and the front sleeve of the piston seat are locked and fixed in a screw-lock manner.    The front-mounted hydraulic collet according to the first aspect of the patent application, wherein an engaging portion is formed in the center of the rear seat and is fixedly connected to the end opening of the chuck body, and a center is further disposed at a central portion of the engaging portion. The through hole is bored for the insertion limit of the socket after the piston seat, and the outer diameter of the engaging portion and the rear sleeve portion are sleeved with an O-ring.    The front-mounted hydraulic collet according to the first aspect of the patent application, wherein the center of the interlocking ring seat has a sleeve hole, and the chuck system is provided with a connecting sleeve extending from the front end into the chamber for The interlocking ring seat is limited by the sleeve hole.