CN211758558U - Numerical control machine tool chuck locking mechanism - Google Patents

Numerical control machine tool chuck locking mechanism Download PDF

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Publication number
CN211758558U
CN211758558U CN201922388690.3U CN201922388690U CN211758558U CN 211758558 U CN211758558 U CN 211758558U CN 201922388690 U CN201922388690 U CN 201922388690U CN 211758558 U CN211758558 U CN 211758558U
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main shaft
locking mechanism
thrust
machine tool
control machine
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江勤剑
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Wenling Xinhong Mechanical Equipment Manufacturing Co ltd
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Wenling Xinhong Mechanical Equipment Manufacturing Co ltd
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Abstract

The utility model provides a digit control machine tool chuck locking mechanism belongs to digit control machine tool anchor clamps technical field. The locking mechanism solves the problems that the design of the existing numerical control machine tool chuck locking mechanism is complex, the matching among all structural parts is not tight, the driving elastic chuck clamping structure is unstable, and the service life is short. This digit control machine tool chuck locking mechanism is including being the main shaft of cavity form and setting up the collet at the one end of main shaft, wears to be equipped with the trombone slide in the main shaft and this trombone slide fit with the main shaft axial, the one end of trombone slide be in the main shaft and can dismantle with collet and link firmly, the other end of trombone slide stretch out the other end of main shaft and with be provided with between the main shaft and drive collet for main shaft axial displacement and make collet and main shaft elasticity support to lean on the drive arrangement that the cooperation is in clamping state. The utility model discloses structural design is simple, makes collet press from both sides tight stability high, presss from both sides tight firm reliable, long service life, and manufacturing cost is lower.

Description

Numerical control machine tool chuck locking mechanism
Technical Field
The utility model belongs to the technical field of the digit control machine tool anchor clamps, a digit control machine tool chuck locking mechanism is related to.
Background
Before the numerical control lathe processes parts, the parts can be processed only by accurately positioning and installing the parts on the lathe.
The part clamping device of the existing numerical control lathe is as follows as Chinese patent number: "201620326537.1" is an economical numerical control lathe collet device, which comprises: the numerical control lathe headstock is characterized by comprising a hollow pull rod, a circular pressing plate, a pawl seat, a pawl, a sliding sleeve, an operating rod, a fixed rod and an elastic chuck, wherein the hollow pull rod is installed on a main shaft position of a headstock of a numerical control lathe, the left end of the hollow pull rod is sequentially sleeved with the circular pressing plate, the pawl seat and the sliding sleeve from left to right, the pawl is uniformly and movably installed on the pawl seat, the sliding sleeve is sleeved on the pawl seat, the contact end of the sliding sleeve and the pawl is conical, the operating rod is installed on the sliding sleeve, the operating rod is connected with the headstock of the numerical control lathe through the fixed rod, and.
The working process of the elastic chuck device is as follows: before the operation, the axis of the operating lever is vertical to the axis of the hollow pull rod, and the elastic chuck is in a loosening state; an operator firstly loads a part to be processed into a central hole of the elastic chuck, then rotates the operating lever on a horizontal plane by taking a connecting point of the fixed rod as a circle center, the sliding sleeve moves towards the left end of the hollow pull rod along with the rotation of the operating lever, along with the movement of the sliding sleeve, a contact point of the pawl and the sliding sleeve slides to the maximum position from the taper minimum position of the contact end of the pawl and the sliding sleeve, so that the pawl is opened, the inclined plane angle of the contact end of the pawl and the circular pressing plate is increased, the pawl pushes the circular pressing plate towards the left side direction of the hollow pull rod, and the hollow pull rod and the circular pressing plate are fixedly connected, so that the hollow pull rod and the elastic chuck are driven to integrally slide towards the left side direction of the hollow pull rod, and an output end main shaft cylinder sleeved on a numerical control lathe headstock outside the elastic chuck immediately extrudes a.
In the structure, the pawl and the sliding sleeve can drive the hollow pull rod and the elastic chuck to integrally slide towards the left direction of the hollow pull rod along with the driving of the hollow pull rod and the elastic chuck, so that the elastic chuck is clamped, but if the clamping force of the pawl is too large, the pawl is easy to break, and a workpiece is easy to fly out of a central hole of the elastic chuck in the machining process, so that safety accidents occur; under the condition of high rotating speed of the lathe, the extension distance of the tail part of the main shaft is too long, and the relationship between concentricity and the rotating centrifugal force of the main shaft does not exist, so that the pawl jumps, the higher the rotating speed of the lathe is, the larger the vibration is, and the larger the noise is; the hard thrust of the cylinder control rod enables the sliding sleeve and a bearing on the sliding sleeve to generate the phenomenon of resisting the hard thrust, the sliding sleeve and the bearing on the sliding sleeve are easily damaged, the lathe is high in noise and poor in stability, the lathe cannot run at a high speed, and the surface cleaning and yield of a machined workpiece are influenced; after the elastic chuck is clamped, the elastic chuck needs to be worked for a long time in an extending state of an air cylinder, the sliding sleeve is pushed to open the pawl, then the pawl pushes the pull pipe connecting disc to enable the elastic chuck to be elastically clamped, the elastic chuck belongs to a structure which is pulled hard, the pushing force exists all the time, the elastic chuck and a lathe spindle are pulled backwards together, if the pushing force is reduced, the clamping force of a workpiece is reduced, and the workpiece is easy to fly out in the machining process or the dangerous conditions such as workpiece scrapping, cutter damage and the like caused by slipping are easily caused; the service life is short, the elastic chuck is unstable in clamping, and the safety accident of part processing and clamping exists.
Disclosure of Invention
The utility model aims at the above-mentioned problem that exists among the prior art, provide a cooperation between structural design is reasonable, simple, each structural component closely, and the drive collet presss from both sides tight stable in structure, long service life's digit control machine tool chuck locking mechanism.
The purpose of the utility model can be realized by the following technical proposal: the utility model provides a digit control machine tool chuck locking mechanism, is including the main shaft that is the cavity form and the collet chuck of setting in the one end of main shaft, the main shaft in wear to be equipped with the trombone slide and should trombone slide and main shaft axial sliding fit, the one end of trombone slide be in the main shaft and can dismantle with collet chuck and link firmly, its characterized in that, the other end of trombone slide stretch out the other end of main shaft and with the main shaft between be provided with drive collet chuck and for main shaft axial displacement and make collet chuck and main shaft elasticity support to lean on the drive arrangement that the cooperation is in clamping state.
The chuck locking mechanism of the numerical control machine tool is mainly provided with the driving device between the pull tube and the main shaft, and drives the elastic chuck to axially displace relative to the main shaft through the driving device and enable the elastic chuck to be elastically abutted and matched with the main shaft, so that the driving structure is high in stability and long in service life; during actual manufacturing, one end of the pull tube is detachably and fixedly connected with the elastic chuck through threads.
In foretell digit control machine tool chuck locking mechanism, drive arrangement include the slide bearing that links firmly with lathe cylinder thrust circle, the other end of trombone slide link firmly has the thrust coupling circle, when collet is in the state of unclamping in the one end of main shaft, and the other end axial of this thrust coupling circle and main shaft is supported and is leaned on the cooperation, thrust coupling circle and main shaft between be provided with distance piece and this distance piece subsection radial higher than the outer wall of main shaft, slide bearing is slided to distance piece department along the axial of main shaft under the drive of lathe cylinder thrust circle, slide bearing supports to act on the distance piece and makes the radial inward shift of distance piece, this distance piece drive trombone slide makes collet be in the clamping state for main shaft axial shift. When the distance piece is arranged between the thrust connecting ring and the main shaft, the distance piece is in abutting fit with the thrust connecting ring and the main shaft, the distance piece is displaced inwards in the radial direction and overcomes the elastic acting force of the elastic chuck, so that the elastic chuck is axially displaced on the main shaft under the action of elasticity, and the elastic chuck is in abutting fit with one end of the main shaft to be in a clamping state.
In foretell digit control machine tool chuck locking mechanism, the other end of main shaft have the assembly groove of axial setting, the thrust clamping ring set up in the assembly groove, when collet is in the state of unclamping in the one end of main shaft, and the tank bottom of this thrust clamping ring and assembly groove supports to lean on the cooperation, when collet is in the tight state of clamp in the one end of main shaft, and the tank bottom interval cooperation of this thrust clamping ring and assembly groove. The purpose that sets up like this is to improve the trombone slide and wear to establish stability in the main shaft, prevents that thrust clamping ring and main shaft dislocation relatively from leaning on.
In foretell digit control machine tool chuck locking mechanism, the spacer include a plurality of activity extrusion steel ball, the inner of thrust clamping ring have the undergauge and form the annular seat one that the axial leaned on a step, interior axial lean on a step be radial outer inclined plane, activity extrusion steel ball set up on annular seat one and along the circumferencial direction interval distribution of annular seat one, the cell wall of assembly groove of main shaft on circumference interval distribution have the through hole that is radial setting, activity extrusion steel ball and through hole radial one by one relative and activity extrusion steel ball pass through the outer wall that the through hole part exceeds the main shaft. The movable extrusion steel ball enables the pull tube and the main shaft to move oppositely under the action of the inclined plane of the inner axial leaning step, and the stability is high.
In the chuck locking mechanism of the numerical control machine tool, the outer edge of the orifice of each through hole is riveted inwards to form an arc-shaped necking part, the radians of the outer wall of the movable extrusion steel ball and the inner wall of the arc-shaped necking part are the same, and the two parts are abutted and matched. The purpose of setting like this is to prevent that activity extrusion steel ball radially breaks away from the through-hole, and stability is high.
In the chuck locking mechanism of the numerical control machine tool, the assembling groove of the main shaft is also internally provided with a positioning check ring, and when the thrust connecting ring is positioned in the assembling groove, the thrust connecting ring and the positioning check ring are axially abutted and matched. The purpose of setting up like this reduces use cost, and when the location retaining ring leaned on wearing and tearing, direct change location retaining ring can.
In the above locking mechanism for the chuck of the numerical control machine tool, the outer end of the positioning retainer ring is provided with a second annular seat which is reduced in diameter to form an outer axial leaning step, the second annular seat and the annular seat are axially leaned against each other, and the movable extrusion steel ball is positioned between the second annular seat and the first annular seat. The purpose of setting up like this is that it is comparatively stable to make the assembly of activity extrusion steel ball between annular seat two, annular seat one, and when activity extrusion steel ball extruded radially inwards, this location retaining ring and thrust clamping ring atress were even.
In the above locking mechanism for the chuck of the numerical control machine tool, the outer axial positioning step is a radial outer inclined surface, and the outer axial positioning step and the inner axial positioning step are symmetrically distributed by the annular seat II and the annular seat I abutting against the surface mirror. The purpose of this setting is when making the activity extrusion steel ball extrude radially, and radial slippage is stable.
In the numerical control machine tool chuck locking mechanism, the inner wall of the thrust connecting ring is provided with an internal thread, the outer wall of the other end of the pull tube is provided with a section of external thread, and the internal thread of the thrust connecting ring is spirally and fixedly connected with the external thread of the other end of the pull tube. The thrust connecting ring is fixedly connected to the other end of the pull pipe in a threaded connection mode, and the connecting structure is stable.
In the chuck locking mechanism of the numerical control machine tool, the main shaft is further fixedly connected with a belt pulley for driving the main shaft to rotate.
Compared with the prior art, the numerical control machine tool chuck locking mechanism has the advantages that:
firstly, the method comprises the following steps: the elastic chuck is clamped without continuously acting force backwards, the sliding bearing is not blocked when moving axially, the phenomenon of resisting can not occur, and the sliding bearing can automatically adjust the self movable gap after the machine tool is started, so that the sliding bearing is not easy to damage and the service life of the sliding bearing is prolonged.
II, secondly: under the condition of high rotating speed of the machine tool, the service lives of the main shaft and the sliding bearing are prolonged due to the characteristics of short extension distance of the tail end of the main shaft, high adhesion between the sliding bearing and the main shaft, high concentricity, small jumping, small vibration, low noise and the like, and the machining efficiency is improved.
Thirdly, the method comprises the following steps: the phenomenon of resisting and hard pushing can not be generated in the working process of the machine tool, and the main shaft is always in the original state and has no traditional pulling phenomenon.
Fourthly, the method comprises the following steps: the maintenance is convenient, the maintenance cost is low, and the numerical control machine tool is suitable for various numerical control machine tools.
The utility model has the advantages of reasonable design, simply, it is high to make collet press from both sides tight stability, presss from both sides tightly firm reliable, long service life, and manufacturing cost is lower, avoids the safe risk of parts machining centre gripping.
Drawings
Fig. 1 is a schematic cross-sectional view of an elastic chuck in an unclamped state in the chuck locking mechanism of a numerical control machine tool.
Fig. 2 is an enlarged schematic view of a portion a in fig. 1.
Fig. 3 is a schematic cross-sectional structural view of the collet locking mechanism of the numerical control machine tool when the collet is in a clamping state.
Fig. 4 is a schematic front view of the elastic chuck in the chuck locking mechanism of the numerical control machine tool.
Fig. 5 is a left side view structural schematic diagram of the elastic chuck in the chuck locking mechanism of the numerical control machine tool.
Fig. 6 is a schematic structural diagram of the chuck locking mechanism of the numerical control machine tool when applied to the numerical control machine tool.
Fig. 7 is a schematic sectional structure diagram of the second embodiment.
FIG. 8 is a schematic sectional view showing the third embodiment.
In the figure, 1, main shaft; 2. an elastic collet; 3. pulling the tube; 4. a sliding bearing; 5. a thrust connecting ring; 6. movably extruding the steel balls; 7. an inner axial leaning step; 8. a first annular seat; 9. an arc-shaped necking part; 10. positioning a retainer ring; 11. an outer axial rest step; 12. a second annular seat; 13. a belt pulley; 14. an axially extending sleeve; 15. a guide sleeve; 16. a cylinder; 17. a fixed seat; 18. a thrust ring; 19. connecting a ball head; 20. a thrust block; 21. and (6) positioning the bolt.
Detailed Description
The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
The first embodiment is as follows:
as shown in fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, the chuck locking mechanism of the numerical control machine tool mainly comprises a hollow main shaft 1 and an elastic chuck 2 arranged at one end of the main shaft 1, and a belt pulley 13 for driving the main shaft 1 to rotate is fixedly connected to the main shaft 1. Wear to be equipped with trombone slide 3 in the main shaft 1 and this trombone slide 3 and the axial sliding fit of main shaft 1, the one end of trombone slide 3 is in main shaft 1 and can dismantle with collet chuck 2 and link firmly, the other end of trombone slide 3 stretch out the other end of main shaft 1 and be provided with between main shaft 1 and drive collet chuck 2 for 1 axial displacement of main shaft and make collet chuck 2 and main shaft 1 elasticity support to lean on the cooperation to be in the drive arrangement of clamping condition.
In actual manufacturing, the specific implementation mode of the driving device is as follows: the device mainly comprises a sliding bearing 4 fixedly connected with a thrust ring 18 of a machine tool cylinder 16, the other end of a pull tube 3 is fixedly connected with a thrust connecting ring 5, a spacing piece is arranged between the thrust connecting ring 5 and a main shaft 1, the portion of the spacing piece is radially higher than the outer wall of the main shaft 1, when the sliding bearing 4 is driven by the thrust ring 18 of the machine tool cylinder 16 to slide to the spacing piece along the axial direction of the main shaft 1, the sliding bearing 4 is abutted against the spacing piece to enable the spacing piece to be radially inwards displaced, and the spacing piece drives the pull tube 3 to be axially displaced relative to the main shaft 1 to enable an elastic chuck 2. In the actual design, the specific connection structure of the thrust connecting ring 5 and the main shaft 1 is as follows: the other end of main shaft 1 has the assembly groove of axial setting, and thrust clamping ring 5 sets up in the assembly groove, and when collet 2 was in the state of unclamping in the one end of main shaft 1, and the tank bottom of this thrust clamping ring 5 and assembly groove supports and leans on the cooperation, and when collet 2 was in the tight state of clamp in the one end of main shaft 1, and the tank bottom interval cooperation of this thrust clamping ring 5 and assembly groove.
During actual manufacturing, the spacer mainly comprises a plurality of movable extrusion steel balls 6, the inner end of the thrust connecting ring 5 is provided with an annular seat I8 with a diameter reduction formed by an inner axial leaning step 7, the inner axial leaning step 7 is a radial outer inclined surface, the movable extrusion steel balls 6 are arranged on the annular seat I8 and are distributed at intervals along the circumferential direction of the annular seat I8, through holes which are arranged in the radial direction are distributed at intervals in the circumferential direction on the groove wall of an assembling groove of the main shaft 1, the movable extrusion steel balls 6 are opposite to the through holes in the radial direction one by one, and the movable extrusion steel balls 6 are higher than the outer wall of the main shaft 1 through the through hole parts. In practical application, the matching relationship between the movable extrusion steel ball 6 and the through hole is as follows: the outer edge of the orifice of each through hole is riveted inwards to form an arc-shaped necking part 9, the radian of the outer wall of the movable extrusion steel ball 6 is the same as that of the inner wall of the arc-shaped necking part 9, and the two parts are abutted and matched.
In order to reduce the use cost, a positioning retainer ring 10 is also arranged in the assembly groove of the main shaft 1, and when the thrust connecting ring 5 is positioned in the assembly groove, the thrust connecting ring 5 and the positioning retainer ring 10 are axially abutted and matched; the outer end of the positioning retainer ring 10 is provided with a second annular seat 12 which is reduced to form an outer axial leaning step 11, the second annular seat 12 and the first annular seat 8 are axially leaned against each other, and the movable extrusion steel ball 6 is positioned between the second annular seat 12 and the first annular seat 8; the outer axial leaning step 11 is a radial outer inclined surface, and the outer axial leaning step 11 and the inner axial leaning step 7 are symmetrically distributed by abutting against the mirror image through the annular seat II 12 and the annular seat I8.
In actual manufacturing, the thrust connecting ring 5 and the pull tube 3 are connected in a specific way: an internal thread is arranged on the inner wall of the thrust connecting ring 5, one section of external thread is arranged on the outer wall of the other end of the pull pipe 3, and the internal thread of the thrust connecting ring 5 is spirally and fixedly connected with the external thread of the other end of the pull pipe 3.
As shown in fig. 1 and 6, in practical application, the cylinder 16 is axially arranged in parallel to the main shaft 1, the machine tool is further provided with a fixed seat 17 which is parallel to the cylinder 16 and symmetrically distributed on the other side of the main shaft 1, the thrust ring 18 is arranged between the fixed seat 17 and the cylinder 16 and sleeved on the sliding bearing 4 of the main shaft 1, the outer end of a cylinder rod in the cylinder 16 is fixedly provided with a connecting ball 19, the cylinder rod of the cylinder 16 is movably connected with one end of the thrust ring 18 through the connecting ball 19, the other end of the thrust ring 18 is hinged with the fixed seat 17 through a bolt, and when the other end of the thrust ring 18 is hinged with the fixed seat 17, the thrust ring 18 can horizontally swing around the hinged position of the two; a thrust block 20 is arranged between the thrust ring 18 and the sliding bearing 4, the thrust block 20 is movably connected with the outer ring of the sliding bearing 4, the thrust block 20 is hinged with the thrust ring 18 and horizontally matched with the thrust ring in a rotating way, and the sliding bearing 4 is axially sleeved on the main shaft 1 and axially matched with the main shaft 1 in a sliding way; a positioning check ring 10 and a thrust connecting ring 5 are arranged in an assembly groove of the main shaft 1, an annular seat II 12 is arranged on the positioning check ring 10, an annular seat I8 is arranged on the thrust connecting ring 5, and a movable extrusion steel ball 6 is arranged between the annular seat II 12 and the annular seat I8; through holes are arranged on the groove wall of the assembly groove of the main shaft 1, the movable extrusion steel balls 6 are opposite to the through holes one by one, the movable extrusion steel balls 6 partially extend out of the outer wall of the assembly groove through the through holes, and the sliding bearing 4 radially extrudes the movable extrusion steel balls 6 when being in axial sliding fit with the main shaft 1; wear to be equipped with trombone slide 3 in the main shaft 1, the one end of trombone slide 3 can be dismantled with collet 2 and link firmly, and the other end of trombone slide 3 links firmly with thrust clamping ring 5, when activity extrusion steel ball 6 radially extrudeed between retaining ring 10, thrust clamping ring 5, this thrust clamping ring 5 drives trombone slide 3, collet 2 whole displacement on main shaft 1.
Positioning bolts 21 are axially arranged between the positioning retainer ring 10 and the thrust connecting ring 5, the positioning bolts 21 are distributed at intervals along the circumferential direction of the positioning retainer ring 10, the positioning bolts 21 penetrate through the thrust connecting ring 5 and are spirally and fixedly connected to the positioning retainer ring 10, a compression spring is sleeved on the positioning bolts 21, a spring groove axially arranged is formed in the outer end face of the thrust connecting ring 5, the compression spring is located in the spring groove, one end of the compression spring is elastically abutted against the head of the positioning bolts 21, and the other end of the compression spring is abutted against the bottom of the spring groove. The purpose of this is: when the elastic chuck 2 is replaced, the movable extrusion steel balls 6 can be effectively prevented from being separated from the positioning retainer ring 10 and the thrust connecting ring 5.
The working process of the elastic chuck 2 in the clamping state is as follows: the cylinder 16 extends outwards to drive the thrust ring 18 to swing backwards (namely the thrust ring 18 horizontally swings around the hinged part with the fixed seat 17), when the thrust ring 18 swings, the thrust ring 18 drives the thrust block 20 to push the sliding bearing 4 to slide backwards on the main shaft 1 along the axial direction of the main shaft 1 due to the relative hinge joint of the thrust ring 18 and the thrust block, and when the sliding bearing 4 is matched with the main shaft 1 in an axial backwards sliding manner, the sliding bearing 4 radially extrudes the movable extrusion steel ball 6; the movable extrusion steel balls 6 overcome the elasticity of the elastic chuck 2 and the elasticity of a compression spring arranged in a spring groove of the thrust connecting ring 5, the movable extrusion steel balls 6 are radially extruded between the positioning retainer ring 10 and the thrust connecting ring 5, the thrust connecting ring 5 drives the pull tube 3 and the elastic chuck 2 to integrally move backwards on the main shaft 1, the elastic chuck 2 is matched with the front end of the main shaft 1 in an elastic abutting mode, and the elastic chuck 2 is in a clamping state.
The working process of the elastic chuck 2 in the loosening state is as follows: the cylinder 16 retracts to drive the thrust ring 18 to swing forwards (namely, the thrust ring 18 horizontally swings around the hinged part with the fixed seat 17), when the thrust ring 18 swings, as the thrust ring 18 and the push block are relatively hinged, the thrust ring 18 drives the push block 20 to push the sliding bearing 4 to slide forwards on the main shaft 1 along the axial direction of the main shaft 1, and when the sliding bearing 4 is in sliding fit with the main shaft 1 axially forwards, the sliding bearing 4 is separated from radial extrusion on the movable extrusion steel ball 6; the movable extrusion steel balls 6 are radially separated from the positioning retainer ring 10 and the thrust connecting ring 5 under the action of the elasticity of the elastic chuck 2 and the elasticity of a compression spring arranged in a spring groove of the thrust connecting ring 5; the pull tube 3 and the elastic chuck 2 integrally move forwards on the main shaft 1, so that the elastic chuck 2 is separated from the front end of the main shaft 1 and is elastically abutted and matched, and the elastic chuck 2 is in a loosening state.
Example two:
as shown in fig. 7, the basic structure of the present embodiment is the same as that of the first embodiment, and the difference is that: one end of the belt pulley 13 is provided with an axial extension sleeve 14, the positioning retainer ring 10 and the thrust connecting ring 5 are arranged in the axial extension sleeve 14, the positioning retainer ring 10 is abutted to and matched with the end part of the main shaft 1, the through holes are circumferentially distributed on the axial extension sleeve 14 at intervals, the movable extrusion steel ball 6 between the positioning retainer ring 10 and the thrust connecting ring 5 is higher than the outer wall of the axial extension sleeve 14 through the through hole part, and the sliding bearing 4 fixedly connected with the thrust ring 18 of the machine tool cylinder 16 is in sliding fit with the axial extension sleeve 14 and can be abutted to and acted on the movable extrusion steel ball 6 in a sliding manner.
Example three:
as shown in fig. 8, the basic structure of the present embodiment is the same as that of the first embodiment, and the difference is that: the outer wall of the main shaft 1 is fixedly provided with a guide sleeve 15, the positioning retainer ring 10 and the thrust connecting ring 5 are positioned in the guide sleeve 15, the positioning retainer ring 10 is abutted to and matched with the end part of the main shaft 1, the through holes are circumferentially distributed on the guide sleeve 15 at intervals, the movable extrusion steel ball 6 positioned between the positioning retainer ring 10 and the thrust connecting ring 5 is partially higher than the outer wall of the guide sleeve 15 through the through holes, and the sliding bearing 4 fixedly connected with the thrust ring 18 of the machine tool cylinder 16 is in sliding fit with the guide sleeve 15 and can be abutted to and act on the movable extrusion steel ball 6 in a.
Those not described in detail in this specification are within the skill of the art. The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (10)

1. The utility model provides a digit control machine tool chuck locking mechanism, is including main shaft (1) that is the cavity form and collet (2) of setting in the one end of main shaft (1), main shaft (1) in wear to be equipped with trombone slide (3) and this trombone slide (3) and main shaft (1) axial sliding fit, the one end of trombone slide (3) be in main shaft (1) and can dismantle with collet (2) and link firmly, its characterized in that, the other end of trombone slide (3) stretch out the other end of main shaft (1) and be provided with between main shaft (1) and drive collet (2) for main shaft (1) axial displacement and make collet (2) and main shaft (1) elasticity support to lean on the drive arrangement that the cooperation is in the clamping state.
2. A numerical control machine chuck locking mechanism according to claim 1, characterized in that the driving device comprises a sliding bearing (4) fixedly connected with a thrust ring (18) of a machine tool cylinder (16), the other end of the pull tube (3) is fixedly connected with a thrust connecting ring (5), when the elastic chuck (2) is in a loose state at one end of the spindle (1), and the thrust connecting ring (5) and the other end of the spindle (1) are in an axial abutting fit, a spacer is arranged between the thrust connecting ring (5) and the spindle (1) and a part of the spacer is radially higher than the outer wall of the spindle (1), when the sliding bearing (4) slides to the spacer along the axial direction of the spindle (1) under the driving of the thrust ring (18) of the machine tool cylinder (16), the sliding bearing (4) acts against the spacer to displace the spacer radially inwards, and the spacer drives the pull tube (3) to axially displace relative to the spindle (1) to make the elastic chuck (2) in a clamping state And (4) a tight state.
3. A numerically controlled machine tool chuck locking mechanism according to claim 2, characterized in that the other end of the spindle (1) has an axially disposed assembly slot, the thrust coupling ring (5) is disposed in the assembly slot, when the collet (2) is in the unclamped state at one end of the spindle (1), the thrust coupling ring (5) and the slot bottom of the assembly slot are in abutting engagement, and when the collet (2) is in the clamped state at one end of the spindle (1), the thrust coupling ring (5) and the slot bottom of the assembly slot are in spaced engagement.
4. The numerical control machine tool chuck locking mechanism according to claim 3, characterized in that the spacer comprises a plurality of movable extrusion steel balls (6), the inner end of the thrust connecting ring (5) is provided with a first annular seat (8) with a reduced diameter to form an inner axial leaning step (7), the inner axial leaning step (7) is a radial outer inclined surface, the movable extrusion steel balls (6) are arranged on the first annular seat (8) and are distributed at intervals along the circumferential direction of the first annular seat (8), through holes radially arranged are distributed at intervals along the circumferential direction on the groove wall of the assembly groove of the main shaft (1), the movable extrusion steel balls (6) are radially opposite to the through holes one by one, and the movable extrusion steel balls (6) are partially higher than the outer wall of the main shaft (1) through the through holes.
5. The numerical control machine chuck locking mechanism according to claim 4, characterized in that the outer edge of the hole of each through hole is riveted inwards to form an arc-shaped necking part (9), the outer wall of the movable extrusion steel ball (6) has the same radian as the inner wall of the arc-shaped necking part (9), and the two are abutted and matched.
6. A numerically controlled machine tool chuck locking mechanism according to claim 4 or 5, characterized in that a positioning retainer ring (10) is further arranged in the assembly groove of the spindle (1), and when the thrust connecting ring (5) is in the assembly groove, the thrust connecting ring (5) and the positioning retainer ring (10) are axially abutted and matched.
7. The numerical control machine chuck locking mechanism according to claim 6, characterized in that the outer end of the positioning retainer ring (10) is provided with a second annular seat (12) which is reduced in diameter to form an outer axial abutting step (11), the second annular seat (12) and the first annular seat (8) are abutted in the axial direction, and the movable extrusion steel ball (6) is positioned between the second annular seat (12) and the first annular seat (8).
8. A numerically controlled machine chuck locking mechanism according to claim 7, wherein the outer axial seating step (11) is a radially outwardly inclined surface, and the outer axial seating step (11) and the inner axial seating step (7) are symmetrically arranged with the annular seat two (12) and the annular seat one (8) abutting against the mirror image.
9. The numerical control machine chuck locking mechanism according to claim 2, characterized in that an inner thread is provided on an inner wall of the thrust connecting ring (5), an outer thread is provided on an outer wall of the other end of the pull tube (3), and the inner thread of the thrust connecting ring (5) is spirally and fixedly connected with the outer thread of the other end of the pull tube (3).
10. A chuck locking mechanism for a numerical control machine according to claim 1 or 9, wherein a belt pulley (13) for driving the spindle (1) to rotate is further fixedly connected to the spindle (1).
CN201922388690.3U 2019-12-27 2019-12-27 Numerical control machine tool chuck locking mechanism Active CN211758558U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113369945A (en) * 2021-06-09 2021-09-10 徐州工业职业技术学院 Mechanical-electrical integrated hydraulic clamping device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113369945A (en) * 2021-06-09 2021-09-10 徐州工业职业技术学院 Mechanical-electrical integrated hydraulic clamping device

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