CN219234042U - Double-station drilling chuck for drilling machine - Google Patents

Abstract

The utility model relates to a duplex position drilling chuck for drilling machine, it includes the casing and sets up the servo motor in the casing, and the casing is installed in the drilling machine, is provided with the code wheel in the casing, and servo motor's output shaft rigid coupling has initiative helical gear, and initiative helical gear meshing has two driven helical gears, and initiative helical gear and two driven helical gears all are located the code wheel top, and every driven helical gear corresponds self intermediate position department and all fixedly connected with arbor, and the arbor passes the carousel setting, and the arbor switching is in the code wheel, and the one end that servo motor was kept away from to every arbor all can be dismantled and is connected with the drilling sword, the code wheel switching in the casing, thereby the code wheel can drive to drive around self axial rotation drives two arbor around the axis rotation of code wheel, the casing is provided with locking device, and locking device can prevent the code wheel rotation. The application has the effect of convenient and fast's relative position between two drilling cutters of regulation.

Description

Double-station drilling chuck for drilling machine

Technical Field

The application relates to the field of processing equipment, in particular to a double-station drilling chuck for a drilling machine.

Background

The drilling machine refers to a machine tool which mainly uses a drill bit to machine holes on a workpiece. Typically the drill bit rotates as the primary motion and the drill bit moves axially as the feed motion. The drilling machine has a simple structure, can drill through holes and blind holes, can replace special cutters, and can perform processing such as expanding, reaming or tapping. The workpiece is stationary during the machining process, the tool is moved, the center of the tool is aligned with the center of the hole, and the tool is rotated (main motion). The drilling machine is characterized in that a workpiece is fixed, and a cutter performs rotary motion. The drill chuck is a device on the drilling machine for connecting a drilling tool.

The existing drilling machine is provided with a double-station drilling machine for meeting the processing requirement and improving the processing speed, a set of drilling equipment is usually added on the basis of the original drilling machine, the double-station drilling machine comprises a driving piece, a connecting piece, cutters and the like, a connecting line between two cutters of the common double-station drilling machine is usually parallel to or perpendicular to the feeding direction of a workpiece, and a user can adjust the relative positions of two cutter drilling holes by adjusting different clamping directions of the workpiece.

For the existing double-station drilling machine, the inventor finds that if multiple times of drilling are needed in the working process of the existing double-station drilling machine and connecting lines among the multiple times of drilling are not identical, a user needs to adjust the clamping angle of the workpiece multiple times, namely, the user needs to detach the workpiece from the clamping position multiple times so as to reclampe the workpiece, and the use is more inconvenient.

Disclosure of Invention

For convenient and fast's regulation relative position between two drilling cutters, this application provides a duplex drilling chuck for drilling machine.

The application provides a duplex drilling chuck for drilling machine adopts following technical scheme:

the utility model provides a duplex position drilling chuck for drilling machine, includes the casing and sets up the servo motor in the casing, and the casing is installed in the drilling machine, its characterized in that: be provided with the code wheel in the casing, servo motor's output shaft rigid coupling has initiative helical gear, and initiative helical gear meshing has two driven helical gears, and initiative helical gear and two driven helical gears all are located the code wheel top, and every driven helical gear corresponds self intermediate position department and all fixedly connected with arbor, and the arbor passes the carousel setting, and the arbor switching is in the code wheel, and the one end that servo motor was kept away from to every arbor all can be dismantled and is connected with the drilling sword, the code wheel switching in the casing, thereby the code wheel can drive and rotate around self axial and drive two arbor and rotate around the axis of code wheel, the casing is provided with locking device, and locking device can prevent the code wheel rotation.

Through adopting above-mentioned technical scheme, when the user uses, the user opens servo motor, and servo motor's output shaft drives initiative helical gear and rotates, and initiative helical gear further drives two driven helical gears of meshing and rotates, and two driven helical gears drive the arbor of its rigid coupling respectively and rotate, finally drive corresponding drilling sword by the arbor and rotate to the work piece is drilled. The driving bevel gear drives the two meshed driven bevel gears to transmit power, and only one motor is needed to drive the two drilling cutters to drill holes, so that the manufacturing cost of the equipment is reduced. When the user needs to adjust the relative position of the two drilling cutters, the user only needs to open the locking device, then the code wheel is rotated, the code wheel drives the driving bevel gear, the two driven bevel gears, the two cutter shafts and the drilling cutters connected to the two cutter shafts to rotate around the central shaft of the code wheel, so that the relative position of the two drilling cutters is adjusted, the user can finish multi-angle continuous drilling operation without frequently adjusting the angle of a workpiece, and the multi-angle continuous drilling device is convenient and quick to use. After the adjustment is finished, the user closes the locking device to lock the coded disc again, so that the influence on the machining precision caused by the rotation of the coded disc in the working process of the drilling machine is prevented.

Optionally, the code wheel is the gear wheel, code wheel week side rigid coupling has a plurality of straight teeth, and a plurality of straight teeth are circumference array setting around code wheel periphery side, locking device includes the locking piece, and locking piece sliding connection corresponds code wheel position department in the casing, and the locking piece can follow the radial slip of code wheel, and locking piece is close to code wheel one side rigid coupling and has a plurality of latch, and the latch can the joint between the adjacent straight teeth of code wheel.

Through adopting above-mentioned technical scheme, when the user uses, the user only need with the locking piece along the radial direction of code wheel to keeping away from the code wheel direction and remove, can make a plurality of latch of locking piece and the straight tooth of code wheel break away from the contact, thereby make the user can rotate the code wheel, the user moves the locking piece along the radial direction of code wheel to being close to the code wheel direction after the code wheel rotates, make a plurality of latch joint again between adjacent straight tooth a plurality of straight tooth of code wheel, because the locking piece only can slide along the radial of code wheel, when a plurality of latch joint is between the straight tooth of code wheel, the locking piece and latch stop the code wheel rotation jointly, thereby play the effect of fixed code wheel.

Optionally, the locking piece is kept away from coded disc one side rigid coupling and is had the handle, and the handle stretches out the casing setting.

Through adopting above-mentioned technical scheme, when the user uses, the user can slide the locking piece in the casing through pulling the handle, and user convenient to use.

Optionally, the casing is close to code wheel position department and installs step motor, and step motor's output shaft is vertical towards the code wheel sets up, step motor's output shaft rigid coupling has the gear shaft, and the gear shaft meshes in a plurality of straight teeth of code wheel, and step motor can drive the gear shaft and rotate and then drive the code wheel and rotate.

Through adopting above-mentioned technical scheme, when the user uses, the user opens step motor, thereby step motor's output shaft gradually rotates to drive the gear shaft of rigid coupling in step motor's output shaft and rotate, and gear shaft rotation is used for driving the coded disc rotation of meshing to make the user can simple and convenient operation coded disc rotate, and then play the effect of adjusting the relative position of two drilling cutters, use swiftly convenient more.

Optionally, the cross section area of the driving helical gear is smaller than the cross section area of the driven helical gear, and the number of teeth of the driving helical gear is smaller than the number of teeth of the driven helical gear.

Through adopting above-mentioned technical scheme, when the user uses, the cross sectional area and the number of teeth of initiative helical gear are all less than the cross sectional area and the number of teeth of two driven helical gears, and two driven helical gears all mesh in initiative helical gear, and then servo motor transmits the moment of initiative helical gear and transmits to two driven helical gears and play the effect of increasing moment, prevent that the drilling sword from taking place the jump sword phenomenon because the material is too hard, moment is not enough in the drilling in-process.

Optionally, the casing peripheral wall rigid coupling has the calibrated scale, and the calibrated scale is the ring form, and the scale is marked on the calibrated scale and is used for showing the angle that the code wheel was rotated, and the code wheel bottom corresponds self intermediate position department rigid coupling and has the link, and the link is close to bottom position department rigid coupling and has slide pipe and pilot lever, and pilot lever sliding connection is in the slide pipe, and the axial of slide pipe can be followed to the pilot lever, and the length direction of pilot lever and slide pipe all sets up along the radial of code wheel, and the pilot lever is kept away from link position department rigid coupling and has the pointer, and the pointer is contradicted in the peripheral wall of calibrated scale, and the pointer can slide around the peripheral wall of calibrated scale.

Through adopting above-mentioned technical scheme, when the user uses, and when the user adjusted the relative position of two drilling cutters through rotating the code wheel, the code wheel rotated and drove link, slide pipe and pilot lever around the axis rotation of code wheel, and the pointer is contradicted in the peripheral wall of calibrated scale all the time, thereby the user can be convenient for the angle that two drilling cutters of accurate regulation of user rotated through observing the angle that pointer and calibrated scale correspond.

Optionally, a connecting spring is fixedly connected in the sliding tube, one end, away from the position where the connecting spring is fixedly connected with the sliding tube, of the connecting spring is fixedly connected with the indicating rod, and the connecting spring applies acting force to the indicating rod to enable the indicating rod to slide along the inner peripheral wall of the sliding tube towards the connecting frame, so that the pointer is abutted against the outer peripheral wall of the dial.

Through adopting above-mentioned technical scheme, when the user uses, when the user rotates the code wheel, because the axle wire of code wheel and the axle wire of casing are different axial setting, consequently the distance between link to the peripheral wall of calibrated scale is being changed all the time, and connecting spring exerts the effort that makes its inner peripheral wall along the slide tube to link direction to the pilot lever to make the pointer can contradict all the time at the peripheral wall of calibrated scale, prevent that the pointer from separating with the calibrated scale, the user of being convenient for observes.

Optionally, each cutter shaft is connected with a limiting sleeve in a threaded manner, a cutter hole is formed in the middle position of the limiting sleeve, a drilling cutter can penetrate through the cutter hole of the corresponding limiting sleeve, and the cutter hole of the limiting sleeve can be abutted to the peripheral wall of the corresponding drilling cutter.

Through adopting above-mentioned technical scheme, when the user uses, the stop collar plays the effect of further fixed drilling sword, because the blade of drilling sword is slender, can take place certain vibration in the servo motor course of working in addition to make the drilling sword take place radial swing except taking place axial rotation, the stop collar supports the peripheral wall at the drilling sword, reduces the radial swing that its takes place, on the one hand plays the effect of improving drilling precision on the other hand then plays protection drilling sword, reduces the phenomenon that drilling sword takes place radial to hit the sword, extension drilling sword's life.

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

1. the design of the code disc, the straight teeth, the cutter shaft, the drilling cutter, the servo motor, the stepping motor, the driving bevel gear, the driven bevel gear, the gear shaft and the shell enables a user to drive the code disc to rotate through operating the stepping motor so as to adjust the relative position of the drilling cutter, a workpiece is not required to be detached, and the drilling machine is convenient and quick to use;

2. the dial, the connecting frame, the slide tube, the indicating rod, the pointer and the connecting spring are designed, and the rotating angle of the code wheel can be obtained through the rotating angle of the pointer on the dial, so that a user can accurately adjust the relative position between two drilling cutters;

3. the design of arbor, stop collar and drilling sword can reduce the radial swing that leads to the drilling sword to take place because the drilling machine vibration in the course of the work, improves the precision that the drilling of drilling sword, protects the life of drilling sword extension drilling sword simultaneously.

Drawings

FIG. 1 is a schematic overall structure of an embodiment of the present application;

FIG. 2 is a cross-sectional view of a helical gear configuration of an embodiment of the present application;

FIG. 3 is a cross-sectional view of the overall structure of an embodiment of the present application;

FIG. 4 is a structural cross-sectional view of a lock block according to an embodiment of the present application;

fig. 5 is a structural cross-sectional view of a arbor in an embodiment of the present application.

Reference numerals illustrate: 1. a housing; 11. an upper mounting surface; 12. a middle mounting surface; 13. a lower mounting surface; 131. a rotating port; 14. a servo motor; 15. a stepping motor; 2. a code wheel; 21. straight teeth; 22. a cutter shaft; 23. a drilling tool; 3. a driving helical gear; 4. driven helical gears; 5. a gear shaft; 6. a locking device; 61. a locking block; 62. a chute; 63. latch teeth; 64. a handle; 7. a dial; 71. a connecting frame; 72. a slide tube; 73. an indication rod; 74. a pointer; 75. a connecting spring; 8. a limit sleeve; 81. and (5) a knife hole.

Detailed Description

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

The embodiment of the application discloses duplex drilling chuck for drilling machine, refer to fig. 1-3, includes: the circular tube-shaped shell 1 comprises an upper mounting surface 11, a middle mounting surface 12 and a lower mounting surface 13, a coded disc 2 is arranged between the middle mounting surface 12 and the lower mounting surface 13 of the shell 1, a rotating opening 131 is formed in the position, corresponding to the coded disc 2, of the lower mounting surface 13, and the coded disc 2 is connected in the rotating opening 131 of the lower mounting surface 13 in a rotating mode. The code wheel 2 is a gear wheel, a plurality of straight teeth 21 are fixedly connected to the peripheral wall of the code wheel 2, and the plurality of straight teeth 21 are arranged in a circumferential array around the peripheral wall of the code wheel 2. The shell 1 is correspondingly connected with a servo motor 14 between an upper mounting surface 11 and a middle mounting surface 12 by bolts, an output shaft of the servo motor 14 passes through the middle mounting surface 12 and is fixedly connected with a driving bevel gear 3, and the driving bevel gear 3 can rotate along with the rotation of the output shaft of the servo motor 14. The bottom of the driving bevel gear 3 is abutted against the code wheel 2, and the driving bevel gear 3 is positioned at the center of the code wheel 2. Two cutter shafts 22 are connected to the position of the code disc 2, which is close to the driving bevel gear 3, the cutter shafts 22 penetrate through the code disc 2, the cutter shafts 22 are connected to the code disc 2, and the two cutter shafts 22 are symmetrically arranged relative to the driving bevel gear 3. And the driven bevel gears 4 are fixedly connected to the positions, close to the top, of each cutter shaft 22, the driven bevel gears 4 are positioned on one side, close to the middle mounting surface 12, of the code wheel 2, each driven bevel gear 4 is meshed with the driving bevel gear 3, and the cross section area and the number of teeth of the driving bevel gear 3 are smaller than those of the driven bevel gears 4. The bottom of each cutter shaft 22 is clamped with a drilling cutter 23, the axial direction of each cutter shaft 22 is arranged in the same direction as the axial direction of the code wheel 2, and the length direction of each drilling cutter 23 is arranged in the same axis as the axial direction of the corresponding cutter shaft 22.

When the drilling tool is used by a user, the user starts the servo motor 14, the output shaft of the servo motor 14 drives the driving bevel gear 3 to rotate, the driving bevel gear 3 drives the two driven bevel gears 4 meshed with the driving bevel gear 3 to rotate, the two driven bevel gears 4 further drive the cutter shafts 22 fixedly connected with the driving bevel gear 4 to rotate respectively, and finally the corresponding drilling cutters 23 are driven to rotate through the rotation of the cutter shafts 22, and the drilling tool moves along with the drilling tool, so that the drilling of the workpiece is completed. The torque output by the transmission shaft of the servo motor 14 is transmitted to the two driven bevel gears 4 through the driving bevel gear 3, and the number of teeth and the cross section area of the driving bevel gear 3 are smaller than those of the driven bevel gears 4, so that the torque increasing function is achieved, the drilling tool 23 can stably drill a workpiece, and the problems that the drilling tool 23 jumps due to the fact that materials are too hard are prevented. The power output by the servo motor 14 is transmitted to the two driven bevel gears 4 through one driving bevel gear 3 and finally transmitted to the two drilling cutters 23, and only one servo motor 14 is needed to drive the two drilling cutters 23 to rotate, so that the production cost of the equipment is reduced.

Referring to fig. 3-5, a stepper motor 15 is disposed at a position of the middle mounting surface 12 close to the code wheel 2, the stepper motor 15 is located at one side of the middle mounting surface 12 far away from the code wheel 2, an output shaft of the stepper motor 15 passes through the middle mounting surface 12, a gear shaft 5 is fixedly connected to the output shaft of the stepper motor 15, the gear shaft 5 is meshed with a plurality of straight teeth 21 of the code wheel 2, and rotation of the output shaft of the stepper motor 15 can drive the gear shaft 5 to rotate so as to drive the code wheel 2 to rotate. The casing 1 is provided with locking device 6 and is used for locking code wheel 2 and prevents that code wheel 2 from rotating, the perisporium of casing 1 is close to code wheel 2 position department and has seted up spout 62, locking device 6 includes lock piece 61, lock piece 61 sliding connection is in spout 62 of casing 1, lock piece 61 can cover the spout 62 setting of casing 1, lock piece 61 can follow the radial slip of casing 1, lock piece 61 is close to code wheel 2 one side rigid coupling and has a plurality of latches 63, latch 63 can do not the joint between two adjacent straight teeth 21 of code wheel 2, a plurality of latches 63 can mesh respectively in a plurality of straight teeth 21 of code wheel 2. The locking block 61 is fixedly connected with a handle 64 at one side far away from the code wheel 2.

When the two boring cutters 23 are used by a user, the user only needs to start the stepping motor 15 when the relative positions of the two boring cutters 23 are required to be adjusted, and then the connecting line of the two boring points and the horizontal direction form an angle, the output shaft of the stepping motor 15 drives the gear shaft 5 to rotate, the gear shaft 5 drives the meshed code disc 2 to rotate, and the rotation of the code disc 2 further drives the two cutter shafts 22 to rotate around the central shaft of the code disc 2, so that the relative positions of the two boring cutters 23 are adjusted. After the code wheel 2 rotates to the corresponding position, the user only needs to close the stepping motor 15 and push the locking block 61 at the same time, so that the locking block 61 slides along the radial direction of the shell 1 towards the code wheel 2, and therefore a plurality of clamping teeth 63 of the locking block 61 are respectively clamped between different straight teeth 21 of the code wheel 2, further the function of blocking the code wheel 2 from rotating to fix the code wheel 2 is achieved, the code wheel 2 is further adjusted and fixed, and the locking block 61 can prevent the code wheel 2 from rotating in the working process to reduce the machining precision.

Referring to fig. 3-5, the outer peripheral wall of the housing 1 is fixedly connected with a dial 7, the dial 7 is annular, the dial 7 and the housing 1 are coaxially arranged, scales are marked on the dial 7 and used for displaying the rotated angle of the code wheel 2, a connecting frame 71 is fixedly connected to the bottom of the code wheel 2 corresponding to the middle position of the code wheel 2, a slide tube 72 and an indicating rod 73 are fixedly connected to the connecting frame 71, the indicating rod 73 is slidably connected in the slide tube 72, the indicating rod 73 can slide along the axial direction of the slide tube 72, the length directions of the indicating rod 73 and the slide tube 72 are all arranged along the radial direction of the code wheel 2, an indicating rod 73 is fixedly connected with an indicating needle 74 at the position, away from the connecting frame 71, of the indicating rod 73, the indicating needle 74 is abutted against the outer peripheral wall of the dial 7, and the indicating needle 74 can slide around the outer peripheral wall of the dial 7. A connecting spring 75 is fixedly connected in the slide tube 72, one end of the connecting spring 75, which is far away from the fixedly connected position of the connecting spring and the slide tube 72, is fixedly connected with the indicating rod 73, and the connecting spring 75 applies a force for enabling the indicating rod 73 to slide along the inner peripheral wall of the slide tube 72 towards the connecting frame 71, so that the pointer 74 is abutted against the outer peripheral wall of the dial plate 7.

Referring to fig. 5, each cutter shaft 22 is screwed with a stop collar 8, a cutter hole 81 is formed in a middle position of each stop collar 8, an inner circumferential wall of each stop collar 8 is inclined, a drilling cutter 23 can pass through the cutter hole 81 of the corresponding stop collar 8, and the cutter hole 81 of the stop collar 8 can be abutted against the circumferential wall of the corresponding drilling cutter 23.

When a user uses the rotary drill bit, when the user needs to adjust the relative positions of the two drilling cutters 23 and then adjust the angle formed by the connecting lines of the two drilling points and the horizontal direction, the user starts the stepping motor 15, the stepping motor 15 drives the code disc 2 to rotate, the code disc 2 rotates to drive the connecting frame 71, the slide tube 72 and the indicating rod 73 to rotate so as to drive the pointer 74 to abut against the dial 7 and rotate around the peripheral wall of the dial 7, the pointer 74 abuts against the dial 7 to be used for assisting the user in observing the rotating angle of the code disc 2 at the moment, the use is convenient, the connecting spring 75 always applies acting force to the indicating rod 73 to enable the indicating rod 73 to slide along the inner peripheral wall of the slide tube 72 to the connecting frame 71 in the rotating process, and therefore the pointer 74 can always abut against the dial 7, and inconvenience in observing results of the user is avoided by separating the pointer 74 from the dial 7. The limiting sleeve 8 plays a role in restraining the swinging of the drilling cutter 23, and because the cutter body of the drilling cutter 23 is slender, and certain vibration can be generated in the working process of the servo motor 14, the drilling cutter 23 can swing radially except for axial rotation, the limiting sleeve 8 abuts against the peripheral wall of the drilling cutter 23, so that the radial swinging of the drilling cutter 23 is reduced, on one hand, the drilling cutter 23 is protected, the radial cutter collision phenomenon of the drilling cutter 23 is reduced, and the service life of the drilling cutter 23 is prolonged.

The implementation principle of the double-station drilling chuck for the drilling machine is as follows: when the drilling tool is used by a user, the user pulls the handle 64 to pull the locking block 61 out along the radial direction of the shell 1 in the sliding groove 62 in the direction away from the code wheel 2, then the user starts the stepping motor 15, and the output shaft of the stepping motor 15 rotates to drive the gear shaft 5 to rotate and finally drive the code wheel 2 to rotate, so that the user adjusts the two drilling tools 23 and corresponding drilling points to proper positions. Then, the user pushes the locking block 61 along the radial direction of the shell 1 towards the code wheel 2, so that a plurality of latches 63 of the locking block 61 are respectively meshed between a plurality of groups of adjacent straight teeth 21 of the code wheel 2, and the function of fixing the code wheel 2 is achieved. After the adjustment is finished, a user starts the servo motor 14, an output shaft of the servo motor 14 rotates to drive the driving bevel gear 3 to rotate, the driving bevel gear 3 rotates to drive the two meshed driven bevel gears 4 to rotate to further drive the cutter shaft 22 and the drilling tool 23 to rotate, and the machining of the workpiece is completed along with the movement of the drilling tool.

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 (8)

1. The utility model provides a duplex position drilling chuck for drilling machine, includes casing (1) and servo motor (14) that set up in casing (1), and casing (1) are installed in the drilling machine, its characterized in that: be provided with coded disc (2) in casing (1), the output shaft rigid coupling of servo motor (14) has initiative helical gear (3), and initiative helical gear (3) meshing has two driven helical gears (4), and initiative helical gear (3) and two driven helical gears (4) all are located coded disc (2) top, and every driven helical gear (4) corresponds self intermediate position department and all rigid coupling has arbor (22), and arbor (22) pass the carousel setting, arbor (22) switching in coded disc (2), and the one end that servo motor (14) were kept away from to every arbor (22) all can be dismantled and be connected with drilling sword (23), coded disc (2) switching in casing (1), coded disc (2) can drive to rotate around self axial and thereby drive the axis rotation of two arbor (22) around coded disc (2), casing (1) are provided with locking device (6), and locking device (6) can prevent coded disc (2) rotation.

2. The dual-station drill chuck for a drilling machine as recited in claim 1, wherein: the utility model provides a coded disc (2) is the gear wheel, coded disc (2) week side rigid coupling has a plurality of straight teeth (21), and a plurality of straight teeth (21) are circumference array setting around coded disc (2) periphery side, locking device (6) are including locking piece (61), locking piece (61) sliding connection in casing (1) correspond coded disc (2) position department, and radial slip of coded disc (2) can be followed in locking piece (61), and locking piece (61) are close to coded disc (2) one side rigid coupling and have a plurality of latch (63), and latch (63) can the joint between coded disc (2) adjacent straight teeth (21).

3. A dual-station drill chuck for a drill press as recited in claim 2, wherein: a handle (64) is fixedly connected to one side, far away from the coded disc (2), of the locking block (61), and the handle (64) extends out of the shell (1).

4. The dual-station drill chuck for a drilling machine as recited in claim 1, wherein: the casing (1) is close to code wheel (2) position department and installs step motor (15), and the vertical orientation of output shaft of step motor (15) code wheel (2) set up, the output shaft rigid coupling of step motor (15) has gear shaft (5), and gear shaft (5) meshing is in a plurality of straight teeth (21) of code wheel (2), and step motor (15) can drive gear shaft (5) and rotate and then drive code wheel (2).

5. The dual-station drill chuck for a drilling machine as recited in claim 1, wherein: the cross-sectional area of the driving bevel gear (3) is smaller than that of the driven bevel gear (4), and the number of teeth of the driving bevel gear (3) is smaller than that of the driven bevel gear (4).

6. The dual-station drill chuck for a drilling machine as recited in claim 1, wherein: the utility model discloses a casing (1) periphery wall rigid coupling has calibrated scale (7), calibrated scale (7) are the ring form, the scale is marked on calibrated scale (7) and is used for showing the angle that coded disc (2) rotated, coded disc (2) bottom corresponds self intermediate position department rigid coupling and has link (71), link (71) are close to bottom position department rigid coupling and have slide pipe (72) and pilot rod (73), pilot rod (73) sliding connection in slide pipe (72), pilot rod (73) can slide along the axial of slide pipe (72), the length direction of pilot rod (73) and slide pipe (72) all sets up along the radial of coded disc (2), pilot rod (73) are kept away from link (71) position department rigid coupling has pointer (74), pointer (74) conflict in the periphery wall of calibrated scale (7), pointer (74) can slide around the periphery wall of calibrated scale (7).

7. The dual-station drill chuck for a drill press of claim 6, wherein: a connecting spring (75) is fixedly connected in the sliding tube (72), one end, away from the fixedly connected position of the connecting spring (75) and the sliding tube (72), of the connecting spring is fixedly connected to the indicating rod (73), and the connecting spring (75) applies an acting force to the indicating rod (73) to enable the indicating rod to slide along the inner peripheral wall of the sliding tube (72) towards the connecting frame (71), so that the pointer (74) is abutted to the outer peripheral wall of the dial (7).

8. The dual-station drill chuck for a drilling machine as recited in claim 1, wherein: every arbor (22) all threaded connection has stop collar (8), stop collar (8) have seted up sword hole (81) corresponding self intermediate position department, and drilling sword (23) can pass sword hole (81) setting of corresponding stop collar (8), and the perisporium of corresponding drilling sword (23) can be in butt in sword hole (81) position department of stop collar (8).

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