CN116175409A - Clamping device for outer circle grinding - Google Patents

Abstract

The application relates to an excircle grinds clamping device belongs to anchor clamps technical field, and it includes chuck main part, clamping piece and driving disc, the chuck main part cover is located on the thimble, the clamping piece along the radial slip of thimble install in the chuck main part, the clamping piece sets up three at least, and a plurality of the clamping piece in the chuck main part is last to evenly arrange along the circumference interval of thimble, the driving disc rotate install in the chuck main part, just the driving disc drive is a plurality of clamping piece synchronous movement. The application has the effect of improving the concentricity accuracy of the workpiece and the thimble.

Description

Clamping device for outer circle grinding

Technical Field

The application relates to the field of clamps, in particular to an outer circle grinding clamping device.

Background

Cylindrical grinding machines are machines that machine the outer surface of a workpiece, which is clamped and positioned by a clamp prior to machining to prevent bouncing or shifting during machining. At present, more clamps are used as heart clamps, and the heart clamps comprise a clamp ring, two clamping bolts arranged on the clamp ring at intervals and a clamping handle eccentrically and rotatably arranged on the clamp ring. When the clamping device is used, one side of a workpiece is inserted into the chuck to be replaced, then, the workpiece is initially positioned by adjusting two clamping bolts through a worker, the workpiece and the thimble are kept concentric, and then, the workpiece is finally clamped through the clamping handle.

Aiming at the related technology, the inventor considers that when workpieces with different diameters are clamped and positioned, the length of two clamping bolts extending into the inside of the clamping ring is not completely ensured to be consistent when the clamping bolts are adjusted manually, so that the concentricity precision of the workpieces and the ejector pins is reduced.

Disclosure of Invention

In order to improve the concentric precision of work piece and thimble, this application provides an excircle grinds clamping device.

The application provides a clamping device is ground to excircle adopts following technical scheme:

the utility model provides an excircle grinds clamping device, includes chuck main part, clamping piece and driving disk, the chuck main part cover is located on the thimble, the clamping piece along the radial slip of thimble install in on the chuck main part, the clamping piece sets up three at least, and a plurality of the clamping piece in the circumference interval along the thimble on the chuck main part evenly arranges, the driving disk rotate install in on the chuck main part, just the driving disk drive is a plurality of clamping piece synchronous movement.

Through adopting above-mentioned technical scheme, the chuck main part will be installed on the lathe together with the thimble, when installing the work piece of different diameter sizes, makes the driving disk use the thimble to rotate as the rotation axis, and a plurality of clamping pieces are along the radial removal of thimble for placing the work piece between a plurality of clamping pieces this moment, later reverse rotation driving disk makes a plurality of clamping pieces follow the radial mutual approaching of thimble and then presss from both sides tight work piece.

When the driving disc is rotated, the clamping pieces synchronously move under the action of the driving disc, so that the moving distances of the clamping pieces are ensured to be the same; meanwhile, the thimble is used as a rotating shaft to rotate when the driving disc rotates, and the clamping piece moves in the radial direction of the thimble, so that no matter how the clamping pieces move to any position, the clamping pieces are all positioned on a concentric circle concentric with the thimble, and the concentric precision of the workpiece and the thimble when the workpiece is clamped is further improved.

Optionally, be provided with on the chuck main part and supply the clamping piece slides the groove that slides, set up the arc drive groove on the driving plate, clamping piece part is located the arc drive inslot is located slide the inslot, just the clamping piece is along with the rotation of driving plate is being close to or is keeping away from the motion of thimble.

Through adopting above-mentioned technical scheme, when the driving disk rotates, the arc drive groove will drive the clamping piece and be located the part that the arc inslot extends along the direction that the arc groove removed, however the clamping piece still is located the inslot of sliding and is spacing partly, so the clamping piece is along the radial slip of the extending direction of sliding the groove that is also the thimble under the drive of the arc drive groove of driving disk, and then makes the clamping piece can be comparatively stable when removing along the radial removal of thimble.

Optionally, the chuck main part includes grip slipper, rotation seat, thimble sleeve and floating subassembly, the thimble sleeve cover is located on the thimble, rotate the seat cover locate on the thimble sleeve and with the thimble sleeve rotates to be connected, the grip slipper cover locate on the rotation seat and with rotate the seat synchronous rotation, slide the groove set up in on the grip slipper, the grip slipper with be equipped with the clearance that floats between the rotation seat, the floating subassembly makes the grip slipper in float in the clearance and then guarantee the concentricity of work piece and thimble.

Through adopting above-mentioned technical scheme, the thimble sleeve is non-rotating, rotates seat and grip slipper and will take the thimble sleeve to take place to rotate as the rotation axis in step. If the workpiece is slightly eccentric during clamping, the workpiece floats in the floating gap under the action of the floating assembly after the workpiece contacts a processing tool for processing during processing. Because the processing tool is fixed, the workpiece and the chuck main body rotate by taking the thimble as a rotating shaft, and further, when in processing, the clamping seat floats, so that the concentricity of the workpiece and the thimble can be improved when the workpiece is processed. If the floating assembly and the floating gap are not present, the workpiece is eccentric during clamping, and the processed product is eccentric.

Optionally, the floating subassembly set up in on the grip slipper, just the floating subassembly sets up three at least, a plurality of the floating subassembly in the circumference interval of rotating the seat is evenly arranged, the floating subassembly includes slider and drive spring, the slider in the floating clearance is followed the radial slip of thimble, drive spring drive the slider directly butt in rotate the seat.

Through adopting above-mentioned technical scheme, drive spring drive slider is butt in rotating the seat always, when the work piece rotated, if the work piece appears decentering, then the eccentric outer wall of work piece can collide processing tool, and the grip slipper will drive the work piece and keep away from one side motion of processing tool to the floating clearance this moment, and then the slider that corresponds will extrude drive spring and give way to improve the concentricity with the thimble during the work piece reprocessing.

Optionally, the floating assembly further comprises an adjusting jackscrew, a floating groove for sliding the floating block is formed in the outer wall of the clamping seat, the adjusting jackscrew is installed in the floating groove in a threaded mode, the driving spring is located between the floating block and the adjusting jackscrew, and the driving spring is in a compressed state.

Through adopting above-mentioned technical scheme, the slider slides in the floating groove, has increased the area of contact between slider and the grip slipper, simultaneously, the slider can directional slip under the guide of floating groove, and then the slider is more stable when sliding. In addition, the compression degree of the driving spring can be adjusted through adjusting the jackscrew, so that the magnitude of the jacking force of the floating block against the rotating seat can be adjusted, and the risk that the workpiece with too large jacking force of the floating block against the rotating seat bumps out of the machining tool due to eccentricity when the workpiece is machined is reduced.

Optionally, the clamping piece includes sliding block and cylinder that slides, the cylinder that slides is located the sliding block is close to one side of driving disk, the cylinder that slides inserts in the arc drive slot and in the arc drive slot slides, the sliding block in slide in the slot.

Through adopting above-mentioned technical scheme, because arc drive slot is a groove that has the radian, if the cylinder that has the edge of sliding in arc drive slot, the risk of card is appeared easily, consequently will slide the part setting into the cylinder of sliding in arc drive slot, has reduced the risk that the clamping piece card was gone into in the in-process of sliding. Compared with a circular cylinder, the sliding block has larger contact area with the clamping seat in the sliding groove, so that the sliding block is more stable when sliding in the sliding groove.

Optionally, one of the sliding cylinders is rotatably connected with an eccentric handle, and the rest of the sliding cylinders are provided with clamping columns.

Through adopting above-mentioned technical scheme, press from both sides tight post and eccentric handle and will follow clamping piece synchronous motion, after a plurality of tight posts and eccentric handle butt surface of work piece, rotate eccentric handle, and then press from both sides the work piece tight spacing. The setting of pressing from both sides tight post has reduced the drive disk and has dropped the risk of grip slipper along ejector pin axial on the one hand, has increased the cylinder protrusion that slides in the length of drive disk on the other hand, and then more stable after pressing from both sides workpiece.

Optionally, the chuck main body further comprises an axial limiting component, a limiting ring groove is formed in the outer wall of the thimble sleeve, and the axial limiting component is mounted on the rotating seat and inserted into the limiting ring groove.

Through adopting above-mentioned technical scheme, rotate after the seat cover is located on the thimble sleeve, can insert spacing annular with the spacing subassembly of axial, and then it is spacing to rotating the seat axial, and the spacing subassembly of axial does not influence and rotates the seat rotation after inserting spacing annular simultaneously.

Optionally, the axial spacing subassembly includes spacing post, set up on the outer wall of rotating the seat with spacing annular intercommunication's cartridge groove, spacing post part is located the cartridge inslot, part is located spacing annular.

Through adopting above-mentioned technical scheme, will rotate the seat cover earlier and locate on the thimble sleeve during the installation, later will spacing post insert spacing inslot through the cartridge groove, realized the spacing installation of axial to rotating the seat limit post and still not produce the interference promptly.

Optionally, the axial spacing subassembly still includes pressure spring and adjusting bolt, spacing post slide install in the cartridge inslot, adjusting bolt screw thread install in the cartridge inslot, the pressure spring is located adjusting bolt with between the spacing post, just the pressure spring is driven spacing post butt in the tank bottom of spacing annular.

Through adopting above-mentioned technical scheme, pressure spring drive spacing post inserts spacing inslot always, and then spacing more stable to rotating seat circumference. Because rotate the seat itself and rotate and install on the thimble sleeve, consequently when rotating eccentric handle and loosening the work piece, drive rotates seat and the synchronous rotation of drive plate and can't loosen, consequently can increase spacing post butt thimble telescopic jacking force through adjusting bolt, receive spacing post's frictional force when the increase rotates the seat, and then reduce work piece and rotate the seat and take place synchronous pivoted risk.

In summary, the present application includes at least one of the following beneficial technical effects:

when the driving disk rotates, the arc-shaped driving groove moves the part of the driving clamping piece positioned in the arc-shaped groove along the extending direction of the arc-shaped groove, however, the clamping piece is also limited in the sliding groove, so that the clamping pieces synchronously slide along the radial direction of the thimble under the driving of the arc-shaped driving groove of the driving disk, the moving distances of the clamping pieces are the same, and the concentricity of the clamping pieces and the thimble when clamping a workpiece is ensured;

when the workpiece rotates, if the workpiece is eccentric, the eccentric outer wall of the workpiece collides with the processing tool, at the moment, the clamping seat drives the workpiece to move to one side of the floating gap away from the processing tool, and the corresponding floating block extrudes the driving spring to give way, so that the concentricity of the workpiece and the thimble is improved when the workpiece is reprocessed;

the spacing post inserts in the spacing annular on the one hand can make to rotate the seat axial spacing on the thimble sleeve, on the other hand can increase spacing post butt thimble sleeve's ejector force through adjusting the adjusting bolt, receives the frictional force of spacing post when increasing to rotate the seat, and then work piece and the synchronous pivoted risk of rotation take place when reducing not hard up eccentric handle.

Drawings

FIG. 1 is a schematic view of the installation of the outer circle grinding clamping device and the thimble.

Fig. 2 is an overall exploded view of the outer circle grinding clamping device in an embodiment of the present application.

Fig. 3 is a schematic view of an installation structure of a clamping seat and a clamping member in an embodiment of the present application.

FIG. 4 is a cross-sectional view of a floating assembly in place in an embodiment of the present application.

FIG. 5 is a cross-sectional view of an embodiment of the present application at the location of an axial stop assembly.

Reference numerals illustrate: 1. a chuck body; 11. a clamping seat; 111. a mounting plate; 112. a clamping block; 113. clamping the rotating hole; 114. a slip groove; 1141. a moving groove; 1142. a limit groove; 115. a floating tank; 1151. a placement groove; 1152. penetrating holes; 116. a countersunk hole; 12. a rotating seat; 121. rotating the base; 1211. a threaded hole; 1212. a sleeve rotation hole; 1213. a plug-in groove; 122. clamping the circular ring; 123. a partition ring; 13. a thimble sleeve; 131. a limit ring groove; 14. a floating assembly; 141. a slider; 1411. a floating part; 1412. a limit part; 142. a drive spring; 143. adjusting the jackscrews; 15. an axial limit assembly; 151. a limit column; 152. a pressure spring; 153. an adjusting bolt; 2. a clamping member; 21. a sliding block; 211. a first slip part; 212. a second slip part; 22. a sliding cylinder; 23. an eccentric handle; 24. clamping the column; 3. a drive plate; 31. driving the rotation hole; 32. an arc-shaped driving groove; 4. and (3) floating the gap.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-5.

The embodiment of the application discloses an excircle grinding clamping device. Referring to fig. 1, the outer cylindrical grinding clamping device includes a chuck body 1, a clamping member 2, and a driving disk 3. The chuck main body 1 is sleeved on the thimble, the clamping pieces 2 are provided with a plurality of clamping pieces 2, and the clamping pieces 2 are slidably arranged on the chuck main body 1 along the radial direction of the thimble. The driving disc 3 is rotatably mounted on the chuck main body 1 by taking the ejector pin as a rotation shaft, and the driving disc 3 is rotated, so that the driving disc 3 drives the clamping pieces 2 to synchronously move along the radial direction of the ejector pin.

Referring to fig. 1 and 2, the chuck body 1 includes a clamping seat 11, a rotating seat 12, a thimble sleeve 13, a floating assembly 14, and an axial limiting assembly 15. The clamping seat 11 is located at one side of the rotating seat 12 along the axial direction of the thimble and sleeved on the rotating seat 12, and the floating assembly 14 can enable the clamping seat 11 and the rotating seat 12 to have certain floating, so that concentricity of the workpiece and the thimble is ensured when the workpiece is machined. The rotating seat 12 is sleeved on the thimble sleeve 13, and the rotating seat 12 is rotatably installed on the thimble sleeve 13 by taking the thimble sleeve 13 as a rotating shaft. The axial limiting assembly 15 axially limits the rotating seat 12 on the thimble sleeve 13. The thimble sleeve 13 is sleeved on the thimble and fixedly connected with the thimble.

Referring to fig. 2 and 3, the clamping seat 11 includes a mounting plate 111 and a clamping block 112 sleeved on the rotating seat 12 at one side of the mounting plate 111. A circular clamping rotating hole 113 for the thimble to pass through is formed in the middle of the mounting plate 111, and the central axis of the clamping rotating hole 113 coincides with the central axis of the thimble. The outer wall of the mounting plate 111 is provided with a sliding groove 114 for sliding the clamping piece 2, the extending direction of the sliding groove 114 is consistent with the radial direction of the clamping rotating hole 113, and the sliding groove 114 is communicated with the clamping rotating hole 113.

Referring to fig. 2 and 3, the sliding slot 114 includes a moving slot 1141 and a limiting slot 1142, the limiting slot 1142 is disposed on a slot wall of a side of the moving slot 1141 facing away from the rotating base 12, and the limiting slot 1142 penetrates through the mounting plate 111. The caliber of the limiting groove 1142 is smaller than that of the sliding groove 114, so that the clamping member 2 is limited in the moving groove 1141 along the axial direction of the clamping rotation hole 113, but the sliding of the clamping member 2 in the moving groove 1141 is not affected.

The clamping piece 2 comprises a sliding block 21 and a sliding cylinder 22, wherein the sliding block 21 slides in the sliding groove 114, and the sliding cylinder 22 is positioned on one side of the sliding block 21 away from the rotating seat 12 and is integrally formed with the sliding block 21. The sliding block 21 comprises a first sliding part 211 and a second sliding part 212, the second sliding part 212 is located at one side of the first sliding part 211, which is close to the sliding cylinder 22, the projection of the first sliding part 211 along the extending direction of the sliding cylinder 22 is located outside the projection of the second sliding part 212 along the extending direction of the sliding cylinder 22, the first sliding part 211 slides in the moving groove 1141, the second sliding part 212 slides in the limiting groove 1142, the limiting groove 1142 limits the first sliding part 211, and the risk that the first sliding part 211 is separated from the moving groove 1141 along the extending direction of the sliding cylinder 22 is reduced. The sliding cylinder 22 protrudes from the sliding groove 114 to be matched with the driving disk 3.

The clamping members 2 are provided at least three, and the clamping members 2 are provided at three or more than three, which are all uniformly distributed on the mounting plate 111 at intervals in the circumferential direction of the clamping rotation hole 113. In this embodiment, three clamping elements 2 are preferably provided.

Referring to fig. 2, the driving disc 3 is located at a side of the mounting disc 111 away from the clamping block 112, and a driving rotation hole 31 through which a thimble passes and which is concentric with the clamping rotation hole 113 is formed in the driving disc 3. The drive disk 3 is provided with an arc-shaped drive groove 32 into which the sliding cylinder 22 is inserted. The concave part of the arc-shaped driving groove 32 faces the driving rotation hole 31, and the distance from the groove wall at one end of the arc-shaped driving groove 32 to the circle center of the driving rotation hole 31 is larger than the distance from the groove wall at the other end of the arc-shaped driving groove 32 to the circle center of the driving rotation hole 31, namely, one end of the arc-shaped driving groove 32 is gradually far away from the circle center of the driving rotation hole 31. Since the present embodiment provides three clamping members 2, the arcuate driving grooves 32 are also provided in three, and the three arcuate driving grooves 32 are in one-to-one correspondence with the three clamping members 2.

Referring to fig. 2 and 3, the side of the sliding cylinder 22 remote from the sliding block 21 protrudes out of the arc-shaped sliding groove 114 after being inserted into the arc-shaped driving groove 32. When the driving disc 3 rotates with the thimble as the rotation axis, the driving disc 3 drives the sliding cylinder 22 to move along the extending direction of the arc-shaped sliding groove 114, and meanwhile, the sliding block 21 can only slide along the radial direction of the thimble under the limit of the sliding groove 114. It should be noted that, when the sliding cylinder 22 is located at the end of the arc-shaped driving slot 32 away from the center of the driving rotation hole 31, the sliding block 21 is still located in the sliding slot 114.

One sliding cylinder 22 among the sliding cylinders 22 is sleeved with an eccentric handle 23, and the eccentric handle 23 rotates by taking the corresponding sliding cylinder 22 as a rotating shaft. One side of the eccentric handle 23 is provided with an abutting arc surface, and the center of the abutting arc surface is not concentric with the center of the corresponding sliding cylinder 22. The rest of the sliding cylinders 22 are sleeved with clamping columns 24 through bolts, the clamping columns 24 are cylinders, and the clamping columns 24 are concentric with the sliding cylinders 22. The diameter of the clamping post 24 is greater than the diameter of the sliding cylinder 22, and the clamping post 24 extends to the side facing away from the drive disk 3.

When the workpiece is installed, one side of the workpiece is placed between the clamping columns 24, then the driving disc 3 is rotated to enable the clamping columns 24 to be abutted against the outer wall of the workpiece, and finally the eccentric handle 23 is rotated to clamp and fix the workpiece.

Referring to fig. 3, the clamping block 112 is disposed on a side of the mounting plate 111 adjacent to the rotating base 12, and the clamping block 112 is integrally formed with the mounting plate 111. The number of the clamping blocks 112 is at least three, and when three or more clamping blocks 112 are arranged, the clamping blocks 112 are uniformly distributed at intervals around the circumference of the clamping rotation hole 113, and in this embodiment, three clamping blocks 112 are preferably arranged.

Referring to fig. 2 and 4, a floating gap 4 is spaced between the clamping block 112 and the outer wall of the rotating seat 12, and the floating assembly 14 drives the clamping block 112 to float in the floating gap 4, so that concentricity of the workpiece and the thimble during processing is improved. The floating assemblies 14 may be disposed on the clamping blocks 112 or on the rotating base 12, and in this embodiment, the floating assemblies 14 are preferably disposed on the clamping blocks 112, and since three clamping blocks 112 are disposed, the floating assemblies 14 are also disposed in three groups, and the three groups of floating assemblies 14 are in one-to-one correspondence with the three clamping blocks 112. The outer wall of the clamping block 112 is provided with a floating groove 115 for installing the floating assembly 14, and the floating assembly 14 slides in the floating groove 115 along the radial direction of the thimble.

The float assembly 14 includes a float block 141, a drive spring 142, and an adjustment jack 143. The floating groove 115 includes a placement groove 1151 and a penetrating hole 1152, the penetrating hole 1152 is located at a bottom of the placement groove 1151, and the penetrating hole 1152 penetrates the clamping block 112 to communicate with the floating gap 4. The placement groove 1151 is preferably a circular groove, and the through hole 1152 is preferably a circular hole. The bore 1152 has a smaller diameter than the diameter of the placement groove 1151. Taking the slider 141 as a circular cylinder for example, the slider 141 includes a floating portion 1411 and a stopper portion 1412, the outer diameter of the stopper portion 1412 is larger than the outer diameter of the floating portion 1411, and the outer diameter of the floating portion 1411 is larger than the aperture of the through hole 1152. The limiting portion 1412 is located in the placing groove 1151, and the floating portion 1411 is inserted into the through hole 1152 and protrudes out of the through hole 1152 to abut against the rotating seat 12. The adjusting jackscrew 143 is mounted at the notch of the placing groove 1151 through threads, one end of the driving spring 142 in the placing groove 1151 abuts against the adjusting jackscrew 143, the other end abuts against the limiting part 1412 of the floating block 141, and the driving spring 142 is in a compressed state.

In another embodiment, the adjusting jack screw 143 and the floating groove 115 are not provided, and the driving spring 142 and the driving block may be directly provided in the floating gap 4, that is, the driving spring 142 is fixedly mounted on one side of the clamping block 112 near the outer wall of the rotating seat 12, and the floating block 141 is fixedly mounted on the other end of the driving spring 142.

Referring to fig. 2 and 3, at least two countersunk holes 116 are formed on one side of the mounting plate 111 away from the clamping block 112, threaded holes 1211 with the same number as that of the countersunk holes 116 are formed on one side of the rotating base 12 close to the mounting plate 111, the threaded holes 1211 are in one-to-one correspondence with the countersunk holes 116, and the threaded holes 1211 are concentric with the countersunk holes 116. The threaded end of the bolt is threadedly mounted in the threaded bore 1211 through the counterbore 116. And because of the floating gap 4, the outer diameter of the threaded column of the bolt is smaller than the aperture of the small hole of the counter bore 116.

The rotating base 12 includes a rotating base 121 and a clamping ring 122, the clamping ring 122 is located at one side of the rotating base 121 close to the clamping blocks 112, and the clamping rings 122 are sleeved with the clamping blocks 112, and the floating blocks 141 are abutted against the outer wall of the clamping ring 122. The rotary seat 12 is provided with a sleeve rotary hole 1212 concentric and communicated with the clamping ring 122, a partition ring 123 is arranged in the sleeve rotary hole 1212, and the central axis of the partition ring 123 coincides with the central axis of the sleeve rotary hole 1212. Both sides of the isolating ring 123 are provided with rotary bearings, and the rotary bearings are sleeved on the thimble sleeve 13.

Referring to fig. 2 and 5, the axial limiting assembly 15 is mounted on the rotating base 121, and the axial limiting assembly 15 includes a limiting post 151, a compression spring 152 and an adjusting bolt 153. An annular limiting ring groove 131 is formed in the outer wall of the thimble sleeve 13, and the limiting ring groove 131 is located at the position of the isolating ring 123 on the thimble sleeve 13. The outer wall of the rotating base 121 is provided with a plug-in groove 1213, and the plug-in groove 1213 penetrates through the rotating base 121 along the radial direction of the isolating ring 123 and is communicated with the limiting ring groove 131. The limiting post 151 is inserted into the inserting groove 1213, the adjusting bolt 153 is installed at the notch of the inserting groove 1213 in a threaded mode, the pressure spring 152 is located in the inserting groove 1213, and one end of the pressure spring 152 abuts against the adjusting bolt 153, and the other end of the pressure spring 152 abuts against the limiting post 151. The compression spring 152 is compressed in the insertion groove 1213, and then the limiting post 151 is driven by the compression spring 152 to be partially positioned in the insertion groove 1213, inserted into the limiting ring groove 131 and abutted against the thimble sleeve 13.

The implementation principle of the excircle grinding clamping device provided by the embodiment of the application is as follows: the driving disc 3 is rotated, the clamping pieces 2 synchronously slide along the radial direction of the thimble under the cooperation of the arc-shaped driving groove 32 and the sliding groove 114, then one side of the workpiece is placed between the clamping pieces 2, the driving disc 3 is rotated reversely to enable the clamping posts 24 to be abutted against the outer wall of the workpiece, and finally the eccentric handle 23 is rotated to clamp and position the workpiece.

In the process that the clamping disc main body drives the clamped workpiece to rotate for machining, if the workpiece is eccentric, one eccentric side of the workpiece can collide with a machining tool so that the clamping seat 11 drives the workpiece to move to the opposite side, and at the moment, the corresponding floating block 141 is extruded to move into the floating groove 115, so that the workpiece can be kept concentric in the machining process.

When the workpiece is removed after the workpiece processing is finished, the eccentric handle 23 is rotated to loosen the workpiece, but the clamping seat 11 and the rotating seat 12 are connected together through bolts, and the rotating seat 12 is rotatably arranged on the thimble sleeve 13. Therefore, when the friction force between the rotating seat 12 and the thimble sleeve 13 is smaller, the rotating seat 12 rotates synchronously by rotating the eccentric handle 23, so that the workpiece rotates synchronously and is not easy to detach. At this time, the adjusting bolt 153 may be screwed, so as to increase the pressure of the pressure spring 152 on the limiting post 151, so that the limiting post 151 is more tightly abutted against the thimble sleeve 13, and further increase the friction between the thimble sleeve 13 and the rotating seat 12. Then, the eccentric handle 23 is turned again, so that the risk of synchronous rotation of the rotary seat 12 and the eccentric handle 23 is reduced.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (10)

1. An excircle grinds clamping device, its characterized in that: including chuck main part (1), clamping piece (2) and driving disk (3), chuck main part (1) cover is located on the thimble, clamping piece (2) along the radial slip of thimble install in on chuck main part (1), clamping piece (2) set up three at least, and a plurality of clamping piece (2) in follow the circumference interval of thimble on chuck main part (1) evenly arranges, driving disk (3) rotate install in on chuck main part (1), just driving disk (3) drive a plurality of clamping piece (2) synchronous motion.

2. An outer cylindrical mill clamping device according to claim 1, wherein: the chuck is characterized in that a sliding groove (114) for sliding the clamping piece (2) is formed in the chuck body (1), an arc-shaped driving groove (32) is formed in the driving disc (3), the clamping piece (2) is partially located in the arc-shaped driving groove (32) and is partially located in the sliding groove (114), and the clamping piece (2) moves close to or far away from the thimble along with the rotation of the driving disc (3).

3. An outer cylindrical mill clamping device according to claim 2, wherein: chuck main part (1) include grip slipper (11), rotate seat (12), thimble sleeve (13) and floating subassembly (14), on the thimble was located to thimble sleeve (13) cover, rotate seat (12) cover locate on thimble sleeve (13) and with thimble sleeve (13) rotate and be connected, grip slipper (11) cover is located rotate on seat (12) and with rotate seat (12) synchronous rotation, slide groove (114) set up in on grip slipper (11), grip slipper (11) with be equipped with between rotation seat (12) and float clearance (4), floating subassembly (14) make grip slipper (11) in float clearance (4) internal float and then guarantee the concentricity of work piece and thimble.

4. A cylindrical mill clamping device according to claim 3, characterized in that: the floating assembly (14) is arranged on the clamping seat (11), the floating assembly (14) is at least three, a plurality of floating assemblies (14) are uniformly distributed at intervals in the circumferential direction of the rotating seat (12), the floating assembly (14) comprises a floating block (141) and a driving spring (142), the floating block (141) slides in the floating gap (4) along the radial direction of the thimble, and the driving spring (142) drives the floating block (141) to be always abutted to the rotating seat (12).

5. The cylindrical mill clamping device according to claim 4, wherein: the floating assembly (14) further comprises an adjusting jackscrew (143), a floating groove (115) for sliding the floating block (141) is formed in the outer wall of the clamping seat (11), the adjusting jackscrew (143) is installed in the floating groove (115) in a threaded mode, the driving spring (142) is located between the floating block (141) and the adjusting jackscrew (143), and the driving spring (142) is in a compressed state.

6. An outer cylindrical mill clamping device according to claim 2, wherein: the clamping piece (2) comprises a sliding block (21) and a sliding cylinder (22), wherein the sliding cylinder (22) is positioned on one side, close to the driving disc (3), of the sliding block (21), the sliding cylinder (22) is inserted into the arc-shaped driving groove (32) and slides in the arc-shaped driving groove (32), and the sliding block (21) slides in the sliding groove (114).

7. The cylindrical mill clamping device according to claim 6, wherein: one of the sliding cylinders (22) is rotatably connected with an eccentric handle (23), and the rest of the sliding cylinders (22) are provided with clamping columns (24).

8. A cylindrical mill clamping device according to claim 3, characterized in that: the chuck is characterized in that the chuck body (1) further comprises an axial limiting component (15), a limiting ring groove (131) is formed in the outer wall of the thimble sleeve (13), and the axial limiting component (15) is mounted on the rotating seat (12) and is inserted into the limiting ring groove (131).

9. The cylindrical mill clamping device according to claim 8, wherein: the axial limiting assembly (15) comprises a limiting column (151), an inserting groove (1213) communicated with the limiting ring groove (131) is formed in the outer wall of the rotating seat (12), and the limiting column (151) is partially located in the inserting groove (1213) and partially located in the limiting ring groove (131).

10. The cylindrical mill clamping device according to claim 9, wherein: the axial limiting assembly (15) further comprises a pressure spring (152) and an adjusting bolt (153), the limiting column (151) is slidably installed in the inserting groove (1213), the adjusting bolt (153) is installed in the inserting groove (1213) in a threaded mode, the pressure spring (152) is located between the adjusting bolt (153) and the limiting column (151), and the pressure spring (152) drives the limiting column (151) to be abutted to the groove bottom of the limiting ring groove (131).

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