TWI681833B - Front-mounted rotary chuck - Google Patents

Abstract

A pre-rotating chuck includes a ring seat, a chuck body, a linkage unit and a back cover. The chuck system uses hydraulic pressure to control the sliding movement of the linkage unit, and then the slide ring seat When the clamping and relaxation of each jaw slider are achieved, and the chuck body is actually running, the pressure of the first oil hole is continuously input, and at the same time, the pressure oil between the piston ring and the rear cover is discharged. The piston ring can be reliably displaced in the direction of the back cover to achieve the clamping state, greatly improving the clamping force of the structure, and ensuring the stability of the clamping of the chuck body during operation, and can also be retained in the ring through the operating oil at the same time during operation The first and second oil transfer grooves of the seat can achieve the effect of lubrication and cooling, effectively reduce the doubt of overheating deformation during the operation of the chuck body, and can support the processing operation at high speed, thereby improving the processing efficiency and the time limit for use.

Description

Front-mounted rotary chuck

The invention relates to a chuck structure, especially a pre-rotating chuck.

According to the press, the chuck is a tool that is necessary for clamping and fixing work during the processing of general lathe tools, etc., because it is used to hold the workpiece during processing, and it is used as a tool for processing operations with its rotation. The smooth and safe operation and rapid operation control are usually provided with a pipeline with air pressure inside, which drives the internal gripper block to shift and place the workpiece. However, due to the structure of the pneumatic chuck, the chuck stops rotating. When the pressure is supplied, the pressure is not applied during operation, and the clamping state is reached only through the pressure-retaining structure, and then the airtight pressure-retaining is achieved through the internal O-ring. Therefore, when the chuck body rotates with the workpiece, the O-ring The pressure loss caused by the aging or fatigue of the leak, or because the assembly accuracy of the O-ring affects the pressure holding effect, resulting in the continuous reduction of the clamping stability due to the running time, which makes the workpiece clamping unstable and work There are risks in the process. The lighter ones may affect the processing quality, resulting in a decrease in precision. The more severe ones are more likely to cause the work pieces to fly out and cause accidental injury by workers.

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

The technical problem to be solved by the present invention is to provide a pre-rotating chuck in view of the above-mentioned defects in the prior art.

The above structure includes: a ring seat, a chuck body, a linkage unit and a back cover, wherein a ring convex portion is provided at the center of the inner diameter of the ring seat, and a curved groove is provided on both sides of the ring convex portion, The end ring of the ring convex portion is provided with at least three grooves, and a first oil conveying groove and a second oil conveying groove are provided between the three grooves, the grooves are all provided with an oil seal, and the outer diameters of the ring seats are respectively opposite There should be a first oil hole and a second oil hole in the first and second oil transfer grooves. The two arc grooves are slidably provided with a plurality of balls. The ring seat is assembled into the chuck body from one end. At one end, the rear cover is assembled to cooperate with the chuck body, and the chuck body and the rear cover are in sliding contact with the balls of the two curved grooves; the center of the chuck body is penetrating and has a cavity, the The front section of the chamber is provided with a sliding ring seat, the outer periphery of the sliding ring seat is provided with a plurality of inclined cone guide grooves, and the front end of the chuck body corresponds to the position of the inclined cone guide groove of the sliding ring seat from outside to inside There are a plurality of sliding grooves, and each of the sliding grooves is provided with a plurality of outlets on the end surface of the chuck body. Each sliding groove can be slidably installed with a clamping jaw slider, and each of the clamping jaw sliders is provided inside A guide block is linked with each of the inclined cone guide grooves, and an internal thread section is provided in the middle section of the chamber, and an oil inlet chamber is formed further on the rear section for installation of the linkage unit in conjunction with the sliding ring seat. The outer diameter of the head body is provided with a plurality of first oil guide holes and second oil guide holes corresponding to the first and second oil transfer grooves of the ring seat, and each of the first oil guide holes leads to the internal thread of the inner diameter of the cavity A plurality of first guide grooves are formed between the segment and the oil inlet chamber, and each of the second oil guide holes leads to the end of the chuck body to form a plurality of second guide grooves; the linkage unit includes a linkage sleeve and a limit A ring and a piston ring, the front end of the linkage sleeve forms an engagement disc, and the engagement disc is locked with the sliding ring seat, and the end of the linkage sleeve forms a combined portion with a threaded section, the limit ring system The linkage sleeve is slidably sleeved, and the outer diameter of the limit ring is provided with an external thread It is locked in the internal thread section of the chamber, and a combined screw hole is provided at the center of the piston ring to lock and lock the combined part of the linkage sleeve, and the outer diameter of the piston ring is sleeved with a plurality of O-rings and along Sliding into the inner wall of the oil chamber; the rear cover has an inner shaft portion and an outer fitting portion with a diameter larger than the inner shaft portion, the inner shaft portion is inserted into the interlocking sleeve to form a position, and the outer fitting portion is inserted into the clip The oil inlet port of the head body restricts the oil inlet chamber between the limit ring and the rear cover, and a plurality of "[" shaped guide flow channels are provided on the inside of the rear cover for conduction A plurality of second guide grooves in the oil inlet chamber and the end of the chuck body.

Preferably, the outer diameter of the ring seat is provided with at least one oil injection hole for each of the two arc grooves, and is locked and fixed by an oil blocking screw respectively.

Preferably, the front end of the chuck body forms an outer stepped portion, the surface ring of the outer stepped portion facing the ring seat is provided with a concave arc groove, and is matched with an arc groove at one end of the ring seat to accommodate the balls.

Preferably, a stepped portion with a circle diameter larger than the outer embedded portion is further provided on the surface of the back cover, the stepped portion is sleeved and fixed with a lubricating ring body, and a plurality of lubricating ring body and the other end of the ring seat are utilized The balls are in sliding contact.

Preferably, a plurality of corresponding screw holes are provided between the end of the chuck body and the back cover, and a plurality of bolts are used to screw-lock.

Preferably, the end face of the connecting disk at the front end of the linkage sleeve corresponds to each of the inclined cone guide grooves of the sliding ring seat with a plurality of positioning grooves for limiting each of the jaw sliders.

Compared with the effect of the previous technology: (1) The original chuck system uses hydraulic pressure to control the sliding movement of the interlocking unit, and then interlocks the sliding ring seat to achieve the clamping and relaxation of each jaw slider, and the When the chuck body is actually in operation, the pressure of the detent oil in the first oil hole is continuously input, and at the same time, the detent oil between the piston ring and the rear cover is discharged, so that the piston ring can be moved toward the rear cover The displacement reaches the clamping state, which greatly improves the clamping force of the structure and ensures the clamping stability of the chuck body during operation. In addition, it can also be lubricated by retaining oil in the first and second oil transfer grooves during operation. The cooling effect can effectively reduce the doubt of overheating and deformation during the operation of the chuck body, and can also support the processing operations at high speeds, thereby improving the processing efficiency and the use time limit.

(2) When the chuck body clamps and relaxes the workpiece, it uses the pressure release and backflow of one in and one out to achieve the balance of the oil path between the chuck body and the ring seat, which greatly reduces the unilateral pressure and the deformation Doubts, increase the service life of the structure.

10‧‧‧ ring seat

11‧‧‧ Ring convex

111‧‧‧Embedded groove

112‧‧‧First oil tank

113‧‧‧Second oil tank

114‧‧‧oil seal

12‧‧‧Curved groove

121‧‧‧ball

122‧‧‧Grease hole

123‧‧‧ oil blocking screw

13‧‧‧First oil hole

14‧‧‧Second oil hole

20‧‧‧Chuck body

21‧‧‧Outer Department

211‧‧‧Concave arc slot

212‧‧‧Chute

213‧‧‧ wear outlet

22‧‧‧Socket Department

221‧‧‧First oil guide hole

222‧‧‧Second oil guide hole

223‧‧‧First guide slot

224‧‧‧Second guide groove

23‧‧‧ chamber

231‧‧‧ Internal thread section

232‧‧‧Into the oil room

24‧‧‧Sliding ring seat

241‧‧‧Taper guide groove

25‧‧‧Jaw slider

251‧‧‧Guide block

30‧‧‧Linked unit

31‧‧‧Linked sleeve

311‧‧‧ Connection plate

312‧‧‧Locating groove

313‧‧‧Combination Department

32‧‧‧Limit ring

321‧‧‧ External thread section

33‧‧‧piston ring

331‧‧‧Combined screw hole

40‧‧‧Back cover

41‧‧‧Inner shaft

42‧‧‧Embedded Department

43‧‧‧ Card Order

431‧‧‧Lubrication ring body

44‧‧‧Guided flow channel

45‧‧‧bolt

Figure 1: This is a perspective view of the present invention.

Figure 2: This is an exploded view of the present invention.

Figure 3: This is a partial exploded view of the chuck body and linkage unit of the present invention.

Fig. 4 is a sectional view of the present invention.

Fig. 5 is a schematic diagram of the injection state of the detent oil when the invention is in a relaxed state and a clamping operation is to be performed.

Fig. 6 is a schematic diagram of the clamping state of the present invention and the injection state of the detent oil when the workpiece is to be relaxed.

In order to enable your reviewing committee to have a better understanding and understanding of the purpose, features and effects of the present invention, the following is please cooperate with the [schematic description] detailed description as follows: First, please refer to the first, second, and third figures As shown, a front-mounted rotary chuck includes: a ring seat 10, a chuck body 20, a linkage unit 30, and a rear cover 40, wherein the inner diameter of the ring seat 10 A ring convex portion 11 is provided at the center, and a curved groove 12 is provided on both sides of the ring convex portion 11, at least three insertion grooves 111 are provided on the end surface ring of the ring convex portion 11, and provided between the three insertion grooves 111 There is a first oil delivery groove 112 and a second oil delivery groove 113. The insertion grooves 111 are all provided with an oil seal 114, and the outer diameter of the ring seat 10 corresponds to the first and second oil delivery grooves 112, 113 respectively. 13 and a second oil hole 14, two of the arc grooves 12 are slidably provided with a plurality of balls 121, and the outer diameter of the ring seat 10 is provided with at least one oil injection hole 122 for each of the two arc grooves 12, And each is locked and fixed by an oil-blocking screw 123, the ring base 10 is assembled into the chuck body 20 from one end, and the rear cover 40 is assembled and connected with the chuck body 20 at the other end, and the chuck body 20 And the rear cover 40 is in sliding contact with the balls 121 of the two arc grooves 12; the front part of the chuck body 20 forms an outer step 21, the rear part forms a sleeve 22, and the outer step 21 faces the The surface ring of the ring seat 10 is provided with a concave arc groove 211, and the arc groove 12 at one end of the ring seat 10 accommodates the balls 121, and the axial center of the chuck body 20 is penetratingly provided with a cavity 23, the front section of the chamber 23 is provided with a sliding ring seat 24, the outer periphery of the sliding ring seat 24 is provided with a plurality of inclined cone guide grooves 241, and the step portion 21 outside the front end of the chuck body 20 corresponds to slide The position of the oblique cone guide groove 241 of the ring seat 24 is provided with a plurality of sliding grooves 212 from the outside to the inside, and moreover each of the sliding grooves 212 is provided with a plurality of through holes 213 on the end surface of the outer step portion 21, each of the sliding grooves 212 A jaw slider 25 can be slidably installed, and a guide block 251 is provided on the inner side of each jaw slider 25 to guide and link with each oblique cone guide groove 241, and an internal thread section is provided in the middle section of the chamber 23 231, an oil inlet chamber 232 is further formed at the rear stage for mounting the interlocking unit 30 and the sliding ring seat 24, and the outer diameter of the sleeve portion 22 of the chuck body 20 corresponds to the first of the ring seat 10 , The second oil delivery grooves 112, 113 are provided with a plurality of first oil guide holes 221 and second oil guide holes 222, each of the first oil guide holes 221 leads to the inner thread section 231 of the inner diameter of the chamber 23 and into A plurality of first guide grooves 223 are formed between the oil chambers 232, and each of the second oil guide holes 222 is connected to the end of the sleeve portion 22 of the chuck body 20 to form a plurality of second guide grooves 224; the linkage unit 30 includes Consecutive A moving sleeve 31, a limit ring 32 and a piston ring 33, an engaging disc 311 is formed at the front end of the connecting sleeve 31, and the engaging disc 311 is locked and combined with the sliding ring seat 24, and the end surface of the engaging disc 311 Each of the oblique cone guide grooves 241 corresponding to the sliding ring seat 24 is provided with a plurality of positioning grooves 312 for blocking and restricting each jaw slider 25, and the end of the linkage sleeve 31 forms a combination of threaded segments Part 313, the limit ring 32 is slidably sleeved with the linkage sleeve 31, and the outer diameter of the limit ring 32 is provided with an external thread section 321 and locked to the internal thread section 231 of the chamber 23, the piston A combined screw hole 331 is provided in the center of the ring 33 to cooperate and lock the combined portion 313 of the link sleeve 31, and the outer diameter of the piston ring 33 is sleeved with a plurality of O-rings and slides along the inner wall of the oil inlet chamber 232; The rear cover 40 has an inner shaft portion 41, an outer fitting portion 42 having a circular diameter larger than the inner shaft portion 41, and a stepped portion 43 having a circular diameter larger than the outer fitting portion 42, the inner shaft portion 41 is embedded in the linking sleeve 31 to form a positioning, and at the same time, the outer fitting portion 42 is inserted into the oil inlet 232 port of the chuck body 20, and the clamping step portion 43 is sleeved and fixed with a lubricating ring body 431, and the lubricating ring body 431 and the ring are used The plurality of balls 121 at the other end of the seat 10 are in sliding contact, whereby the oil inlet chamber 232 is interposed between the limit ring 32 and the rear cover 40, and a plurality of The guiding flow path 44 is used to connect the oil inlet chamber 232 and the plurality of second guide grooves 224 at the end of the chuck body 20.

For the composition of the structure, please refer to Figures 1, 2, 3, and 4 again. The chuck body 20 is composed of a plurality of sliding grooves 212 into a clamping jaw slider 25, and the clamping jaw sliders The front end of 25 is protruded from each of the through holes 213, and the chamber 23 of the chuck body 20 is slidably assembled with the sliding ring seat 24, and the inclined cone guide groove 241 around the sliding ring seat 24 is utilized It cooperates with the guide block 251 of each of the jaw sliders 25, and then moves through the sliding ring seat 24 in the chamber 23 to guide the control of the cooperative movement of each of the jaw sliders 25 to achieve the clamping operation Or release the clamping action, the interlocking sleeve 31 of the interlocking unit 30 is fastened by the connecting disc 311 at the front end and the sliding ring seat 24 through bolts, the limit ring 32 is sleeved outside the linkage sleeve 31, and is locked on the inner threaded section 231 of the chamber 23 with a threaded section 321 on the outer periphery as a limiting displacement path of the sliding ring seat 24, the piston ring 33 is The combination screw hole 331 is locked in the combination part 313 of the linkage sleeve 31, and further restricts the piston ring 33 in the oil inlet chamber 232. The ring seat 10 sequentially embeds a plurality of oil seals 114 in each of the insertions In the groove 111, the ring seat 10 is threaded on the sleeve 22 of the chuck body 20, and one end of the ring seat 10 facing the chuck body 20 outside the step 21 is a plurality of balls 121 placed in Between the arc groove 12 and the concave arc groove 211, the ring seat 10 and the chuck body 20 are brought into sliding contact through the balls 121, and at the same time, the first and second oil delivery grooves 112 of the ring convex portion 11 are , 113 respectively communicate with the first and second oil guide holes 221, 222 of the socket portion 22, and finally install the rear cover 40 on the other side of the ring seat 10, and respectively connect the inner shaft portion 41 and the The outer fitting portion 42 is nested in the ends of the linkage sleeve 31 and the oil inlet chamber 232, and at the same time, the sliding range of the piston ring 33 is restricted by the limiting ring 32 and the rear cover 40, and the stepped portion of the rear cover 40 43. A lubricating ring body 431 is further sleeved in sliding contact with the balls 121 in the arc groove 12 at the other end of the ring seat 10, and a plurality of corresponding screws are provided between the end of the chuck body 20 and the back cover 40 The holes are screwed together by a plurality of bolts 45, so that the back cover 40 and the chuck body 20 form a synchronous rotation action. With the above structure, a front-type rotary chuck is completed.

For the actual use of the structure, please refer to Figures 5 and 6 in order. The outer diameter of the ring seat 10 corresponds to the first and second oil holes 13 and 14 of the first and second oil transfer grooves 112 and 113 respectively. A detent oil pipe is connected, and the chuck body 20 is filled with detent oil through the second oil hole 14 into the oil inlet chamber 232 before being used, and the detent oil is interposed between the rear cover 40 and the piston ring 33 At the same time, the piston ring 33 is pushed against the limit ring 32, and at the same time, the sliding ring seat 24 is controlled to control the clamping jaw sliders 25 to form an outwardly expanded state for the workpiece to be placed for clamping operation, thereby When the chuck body 20 intends to clamp the workpiece, the detent oil is pressurized and input by the detent oil pipe of the first oil hole 13, and the The oil groove 112 flows into the first oil guide hole 221 of the outer diameter of the sleeve portion 22 of the chuck body 20 and is injected into the oil chamber 232 between the limit ring 32 and the piston ring 33 along the first guide groove 223 , And then push the piston ring 33 to slide and displace in the direction of the rear cover 40, and at the same time drive the sliding ring seat 24 to slide along the chamber 23, so that the guide block 251 of each jaw slider 25 is moved along by the displacement of the sliding ring seat 24 Each of the inclined cone guide grooves 241 slides inward to achieve the purpose of the clamping jaw slider 25 to concentrate and clamp the workpiece at the center, and the original oil between the back cover 40 and the piston ring 33 will be affected by the piston The ring 33 moves and squeezes in the direction of the rear cover 40, and then is introduced into the second guide groove 224 of the chuck body 20 through the guide flow path 44 of the rear cover 40, and finally accommodated in the second oil guide hole 222 and the ring seat 10 Between the second oil transfer groove 113 and the unpressurized oil supply state through the detent oil pipe of the second oil hole 14, the detent oil can form a pressure maintaining effect in the second oil transfer groove 113.

Furthermore, after the workpiece is clamped, the rotation of the chuck body 20 can be controlled to achieve the cutting operation of the workpiece, wherein the ring seat 10 is restricted and fixed, and passes through a plurality of balls in the arc grooves 12 on both sides 121 is in sliding contact with the chuck body 20 and the rear cover 40, so that the chuck body 20 has a smooth and stable rotation action, and the ring seat 10 is also secured to the first and second oil delivery grooves 112, 113 of the ring protrusion 11 Pressed with detent oil to provide lubrication and oil cooling effect of the chuck body 20 in the rotating state, so that the chuck body 20 can support high-speed processing operations, and at the same time prevent the chuck body 20 from being heated and deformed during the operation process. Processing efficiency and use time limit.

Conversely, when the chuck body 20 wants to loosen the workpiece, it is then sequentially viewed from Figs. 6 and 5, and the depressing oil is pressurized by the depressing oil pipe of the second oil hole 14 and passes through the second The oil transfer groove 113 flows into the second oil guide hole 222 of the chuck body at the outer diameter of the sleeve portion 22, and enters the guide flow path 44 of the rear cover 40 along the second guide groove 224, and finally fills the cavity 23 Into the oil chamber 232, and then pours detent oil from the rear cover 40 and pushes the piston ring 33 to slide in the direction of the limit ring 32, and at the same time drives the sliding ring seat 24 to slide along the chamber 23 to make each The guide block 251 of the jaw slider 25 is expanded and displaced along each inclined cone guide groove 241 due to the reset of the slide ring seat 24, so as to achieve the purpose of the jaw slider 25 to relax the workpiece, which was originally interposed between the piston ring 33 and The detent oil between the limit rings 32 will be squeezed in the direction of the limit ring 32 due to the movement of the piston ring 33, and then flow out through the first guide groove 223 and the first oil guide hole 221, and be accommodated in the ring seat Between the first oil delivery tank 112 and the unpressurized oil supply state through the detent oil pipe of the first oil hole 13, the detent oil can form a pressure maintaining effect in the first oil delivery tank 112.

With the structure of the above specific embodiment, the following benefits can be obtained: (1) The chuck body 20 of the present invention uses hydraulic pressure to control the sliding movement of the interlocking unit 30, and then interlocks the sliding ring seat 24 to each of the clamps When the jaw slider 25 is clamped and relaxed, and the chuck body 20 is actually in operation, the pressure of the first oil hole 13 is continuously input, and at the same time, the pressure oil between the piston ring 33 and the rear cover 40 is discharged , So that the piston ring 33 can be reliably displaced in the direction of the rear cover 40 to achieve the clamping state, greatly improving the clamping force of the structure, and ensuring the clamping stability of the chuck body 20 during operation, and can also pass through the operating oil at the same time during operation It stays in the first and second oil tanks 112 and 113 to achieve the effect of lubrication and cooling, which effectively reduces the doubt of overheating deformation during the operation of the chuck body 20, and can also support the processing operations at high speeds, thereby improving the processing efficiency and use time limit.

(2) When the chuck body 20 clamps and relaxes the workpiece, it uses the pressure relief flow back and forth to achieve the balance of the oil path between the chuck body 20 and the ring seat 10, which greatly reduces the unilateral pressure. There are doubts about variants, which can increase the service life of the structure.

In summary, the present invention has indeed reached a breakthrough structural design, and has improved the content of the invention, and at the same time can achieve industrial utility and progress, and the present invention has not been found in any publication, but also novel, when In line with the relevant laws and regulations of the Patent Law, I filed an application for an invention patent in accordance with the law, and urge the examination committee of the Jun Bureau to grant legal patent rights.

The above is only one of the preferred embodiments of the present invention. The scope of implementation of the invention; that is, any changes and modifications made in accordance with the scope of the patent application of the present invention shall still fall within the scope of the invention patent.

10‧‧‧ ring seat

11‧‧‧ Ring convex

111‧‧‧Embedded groove

112‧‧‧First oil tank

113‧‧‧Second oil tank

114‧‧‧oil seal

12‧‧‧Curved groove

121‧‧‧ball

122‧‧‧Grease hole

123‧‧‧ oil blocking screw

13‧‧‧First oil hole

14‧‧‧Second oil hole

20‧‧‧Chuck body

21‧‧‧Outer Department

22‧‧‧Socket Department

221‧‧‧First oil guide hole

222‧‧‧Second oil guide hole

25‧‧‧Jaw slider

40‧‧‧Back cover

41‧‧‧Inner shaft

42‧‧‧Embedded Department

43‧‧‧ Card Order

431‧‧‧Lubrication ring body

44‧‧‧Guided flow channel

45‧‧‧bolt

Claims (6)

A pre-rotating chuck includes: a ring seat, a chuck body, a linkage unit and a back cover, wherein a ring convex portion is provided at the center of the inner diameter of the ring seat, and both sides of the ring convex portion All are provided with a curved groove, and the end ring of the ring convex portion is provided with at least three insertion grooves, and a first oil transmission groove and a second oil transmission groove are provided between the three grooves, and the grooves are all provided with an oil seal, and The outer diameter of the ring seat respectively corresponds to the first and second oil transfer grooves and is provided with a first oil hole and a second oil hole. The two arc grooves are slidably set with a plurality of balls, and the ring seat is composed of one end Into the chuck body, the other end is assembled with the rear cover and the chuck body is fitted and linked, and the chuck body and the rear cover are in sliding contact with the balls of the two arc grooves; the center of the chuck body is penetrated There is a chamber in the front part of the chamber for the assembly of a sliding ring seat, the outer periphery of the sliding ring seat is provided with a plurality of inclined cone guide grooves, and the front end of the chuck body corresponds to the inclined cone guide groove of the sliding ring seat The position is provided with a plurality of chute from the outside to the inside, more corresponding to each chute is provided with a plurality of through holes on the end surface of the chuck body, each of the chute can be slidably installed a jaw slider, and each A guide block is provided on the inner side of the jaw slide block and linked with each of the inclined cone guide grooves, and an internal thread section is provided in the middle section of the chamber, and an oil inlet chamber is formed further on the rear section for the installation of the linkage unit and the sliding The ring seat is combined and linked. The outer diameter of the chuck body corresponds to the first and second oil transfer grooves of the ring seat. A plurality of first oil guide holes and second oil guide holes are provided, and each of the first oil guide holes is connected to A plurality of first guide grooves are formed between the internal thread section of the inner diameter of the chamber and the oil inlet chamber, and each second oil guide hole leads to the end of the chuck body to form a plurality of second guide grooves; the linkage unit includes a An interlocking sleeve, a limit ring and a piston ring, the front end of the interlocking sleeve forms an engagement disc, and the interlocking disc is locked with the sliding ring seat, and the end of the interlocking sleeve forms a combination of threaded segments Part, the limit ring system is slidably sleeved with the linkage sleeve, and the The outer diameter of the limit ring is provided with an external threaded section and is locked to the internal threaded section of the chamber, a combined screw hole is provided at the center of the piston ring to lock and lock the combined portion of the linkage sleeve, and the outer diameter of the piston ring A plurality of O-rings are sleeved and slide along the inner wall of the oil inlet chamber; the rear cover has an inner shaft portion and an outer fitting portion with a circular diameter larger than the inner shaft portion, the inner shaft portion is embedded in the interlocking sleeve to form a positioning, At the same time, the outer fitting part is inserted into the oil inlet port of the chuck body, so that the oil inlet chamber is restricted between the limit ring and the rear cover, and a plurality of "[" The guide flow channel is used to connect the oil inlet chamber and the plurality of second guide grooves at the end of the chuck body. According to the front-mounted rotary chuck described in item 1 of the patent application scope, wherein the outer diameter of the ring seat is provided with at least one oil injection hole for each of the two arc grooves, and is locked and fixed by an oil blocking screw respectively. According to the front-mounted rotary chuck according to item 1 of the patent application scope, wherein the front end of the chuck body forms an outer stepped portion, the surface ring of the outer stepped portion facing the ring seat is provided with a concave arc groove, and is matched with the ring The arc groove at one end of the seat accommodates the balls. According to the front-mounted rotary chuck according to item 1 of the patent application scope, wherein the back cover surface is further provided with a clamping step portion having a circular diameter larger than the outer fitting portion, the clamping step portion is sleeved and fixed with a lubricating ring body, and utilized The lubricating ring body is in sliding contact with a plurality of balls on the other end of the ring seat. According to the front-mounted rotary chuck according to item 1 of the scope of the patent application, a plurality of corresponding screw holes are provided between the end of the chuck body and the rear cover, and a plurality of bolts are used to screw-lock. According to the front-mounted rotary chuck described in item 1 of the patent application scope, wherein the end face of the coupling disk at the front end of the linkage sleeve corresponds to each of the inclined cone guide grooves of the sliding ring seat is provided with a plurality of positioning grooves to limit Each jaw slider.

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