CN214640323U

CN214640323U - Main shaft of numerical control machine tool

Info

Publication number: CN214640323U
Application number: CN202121191810.1U
Authority: CN
Inventors: 张晨; 王建军; 相卫民
Original assignee: SHANDONG FANGDA MACHINERY CO LTD
Current assignee: SHANDONG FANGDA MACHINERY CO LTD
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2021-11-09
Anticipated expiration: 2031-05-31

Abstract

The utility model discloses a digit control machine tool main shaft, including the headstock, the top of headstock is rotated and is alternated and install the main shaft rotor, and the bottom mounting of headstock alternates and install the axle sleeve, and the middle part of axle sleeve inner wall and the bottom of inner wall are rotated through four bearings and are installed the main shaft body, and the top fixed connection of connecting piece and main shaft body is passed through to the bottom of main shaft rotor, and the inside of axle sleeve is equipped with spacing subassembly, and the bottom mounting of main shaft body has the flange, and the bottom of flange is equipped with the centre gripping subassembly, the beneficial effects of the utility model are that: the pressure is transmitted to the main shaft body through the limiting assembly under the condition that the normal rotation of the main shaft body is not influenced, the main shaft body is always kept at one position to rotate, the main shaft body is prevented from deviating when rotating, the machining precision is improved, workpieces or tools with various sizes are clamped and fixed through the clamping assembly, and the workpieces or tools and the main shaft body are guaranteed to rotate coaxially.

Description

Main shaft of numerical control machine tool

Technical Field

The utility model relates to a digit control machine tool, in particular to digit control machine tool main shaft belongs to digit control machine tool technical field.

Background

The numerical control machine tool is a digital control machine tool for short, and is an automatic machine tool provided with a program control system. The control system is capable of logically processing and decoding a program defined by a control code or other symbolic instructions, represented by coded numbers, which are input to the numerical control device via the information carrier. After operation, the numerical control device sends out various control signals to control the action of the machine tool, and the parts are automatically machined according to the shape and the size required by the drawing. The main shaft of a machine tool refers to a shaft on the machine tool for driving a workpiece or a cutter to rotate, and generally comprises a main shaft part, a bearing, a transmission part and the like, and is mainly used for supporting transmission parts such as gears and belt pulleys in the machine tool and transmitting movement and torque, for example, the main shaft part is arranged in most machine tools, and the movement precision and the structural rigidity of the main shaft part are important factors for determining the processing quality and the cutting efficiency.

The existing numerical control machine tool spindle is easy to deviate when rotating at a high speed to process, so that the processing precision and stability are reduced, and meanwhile, the structure for clamping the workpiece or the cutter on the spindle cannot be adjusted, and only the workpiece or the cutter with a fixed size can be clamped.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a digit control machine tool main shaft to the main shaft that provides easily takes place the skew and the problem that the structure that is used for centre gripping work piece or cutter on the main shaft can't be adjusted in solving above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a spindle of a numerical control machine tool comprises a spindle box, wherein a spindle rotor is rotatably and alternately installed at the top end of the spindle box, a spindle sleeve is fixedly and alternately installed at the bottom end of the spindle box, a spindle body is rotatably installed at the middle part of the inner wall of the spindle sleeve and the bottom part of the inner wall of the spindle sleeve through four bearings, the bottom end of the spindle rotor is fixedly connected with the top end of the spindle body through a connecting piece, a limiting assembly is arranged inside the spindle sleeve and comprises four telescopic rods distributed in an annular manner, the four telescopic rods are fixedly arranged at the top part of the inner wall of the spindle sleeve, one ends of the four telescopic rods are fixedly provided with arc-shaped plates, a plurality of balls are respectively embedded in the inner sides of the four arc-shaped plates in a rolling manner and are in rolling contact with the top part of the spindle body, springs are fixedly arranged at the outer sides of the four arc-shaped plates, and one ends of the four springs are fixedly connected with the top part of the inner wall of the spindle sleeve, the bottom fixed mounting of main shaft body has the flange, the bottom of flange is equipped with the centre gripping subassembly, the centre gripping subassembly includes hollow chuck, the chuck sets up the bottom at the flange, four spouts that are the annular and distribute are seted up to the bottom of chuck, four the equal slidable mounting in inside of spout has three hornblocks, four the equal fixed mounting in bottom of three hornblocks has the grip block, the top fixed mounting of chuck inner wall has the reference column, sliding sleeve is equipped with the slide cartridge on the reference column, the bottom fixed mounting of slide cartridge inner wall has the adjustable ring, four the top in the three hornblocks outside all with the inner wall sliding contact of adjustable ring, one side of chuck top is rotated and is alternated and installs the pivot, the lead screw is installed to one side screw thread interlude on slide cartridge top, the top of lead screw and the bottom fixed connection of pivot.

As an optimal technical scheme of the utility model, the top fixed mounting of pivot has anti-skidding handle.

As an optimal technical scheme of the utility model, four connecting screw that are the annular and distribute, four are installed to the top screw thread interlude of flange the top of chuck is run through to the equal screw thread in connecting screw's head end.

As a preferred technical scheme of the utility model, the bottom fixed mounting of axle sleeve has the closing plate, the through-hole has been seted up at the middle part of closing plate, the through-hole is run through to the bottom of main shaft body, the inside fixed embedding of through-hole is equipped with the lip oil blanket, the inner circle of lip oil blanket and the bottom sliding contact of main shaft body.

As an optimized technical scheme of the utility model, the inlet port has been seted up to the opposite side of axle sleeve.

As an optimal technical scheme of the utility model, the oil outlet has all been seted up, two to the middle part of axle sleeve inner wall opposite side and the bottom of inner wall opposite side through the oil duct intercommunication between oil outlet and the inlet port.

As an optimized technical scheme of the utility model, the sealing plug is installed to the block on the inlet port.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model relates to a numerical control machine tool spindle, through the spring in the spacing subassembly exert pressure to the arc plate, when the main shaft body in the rotation is being driven by the main shaft rotor and is rotating at a high speed, the ball on the arc plate transmits pressure to the main shaft body under the condition that the normal rotation of the main shaft body is not influenced, so that the main shaft body is always kept in one position for rotating, the main shaft body is prevented from deviating when rotating, and the processing precision is improved; the rotating shaft in the clamping assembly drives the screw rod to rotate, the screw rod drives the sliding cylinder to slide on the positioning column, the adjusting ring is driven to move up and down, and then the four triangular blocks are driven to move synchronously on the sliding grooves, so that workpieces or tools with various sizes are clamped and fixed by the clamping blocks, and the workpieces or tools and the main shaft body are guaranteed to rotate coaxially.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic sectional structure of the present invention;

FIG. 3 is an enlarged schematic view of part A of FIG. 2 according to the present invention;

FIG. 4 is an enlarged schematic view of a portion B of FIG. 2 according to the present invention;

fig. 5 is one of the schematic top-view sectional structures of the present invention;

fig. 6 is a second schematic top view of the cross-sectional structure of the present invention.

In the figure: 1. a main spindle box; 2. a main shaft rotor; 3. a shaft sleeve; 4. a main shaft body; 5. a limiting component; 51. a telescopic rod; 52. an arc-shaped plate; 53. a ball bearing; 54. a spring; 6. a flange; 7. a clamping assembly; 71. a chuck; 72. a chute; 73. a triangular block; 74. a clamping block; 75. a positioning column; 76. a slide cylinder; 77. an adjusting ring; 78. a rotating shaft; 79. a screw rod; 8. an anti-slip handle; 9. connecting a screw rod; 10. a sealing plate; 11. a through hole; 12. double-lip oil seal; 13. an oil inlet hole; 14. an oil outlet hole; 15. an oil passage; 16. a sealing plug; 17. a connecting member; 18. and a bearing.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-6, the present invention provides a main shaft of a numerical control machine, including a main shaft box 1, a main shaft rotor 2 rotatably inserted and installed on the top end of the main shaft box 1, a shaft sleeve 3 fixedly inserted and installed on the bottom end of the main shaft box 1, a main shaft body 4 rotatably installed on the middle portion of the inner wall of the shaft sleeve 3 and the bottom portion of the inner wall through four bearings 18, the bottom end of the main shaft rotor 2 is fixedly connected with the top end of the main shaft body 4 through a connecting member 17, a position limiting assembly 5 is disposed inside the shaft sleeve 3, the position limiting assembly 5 includes four annularly distributed telescopic rods 51, the four telescopic rods 51 are all fixedly disposed on the top portion of the inner wall of the shaft sleeve 3, an arc-shaped plate 52 is fixedly installed on one end of the four telescopic rods 51, a plurality of balls 53 are respectively embedded on the inner sides of the four arc-shaped plates 52 in a rolling manner, the plurality of balls 53 are all in rolling contact with the top portion of the main shaft body 4, springs 54 are all fixedly installed on the outer sides of the four arc-shaped plates 52, one end of each of the four springs 54 is fixedly connected with the top of the inner wall of the shaft sleeve 3, the bottom end of the main shaft body 4 is fixedly provided with a flange 6, the bottom end of the flange 6 is provided with a clamping assembly 7, the clamping assembly 7 comprises a hollow chuck 71, the chuck 71 is arranged at the bottom end of the flange 6, the bottom end of the chuck 71 is provided with four sliding chutes 72 distributed in an annular shape, the insides of the four sliding chutes 72 are respectively and slidably provided with a triangular block 73, the bottom ends of the four triangular blocks 73 are respectively and fixedly provided with a clamping block 74, the top end of the inner wall of the chuck 71 is fixedly provided with a positioning column 75, the positioning column 75 is slidably sleeved with a sliding cylinder 76, the bottom end of the inner wall of the sliding cylinder 76 is fixedly provided with an adjusting ring 77, the tops of the outsides of the four triangular blocks 73 are respectively and slidably contacted with the inner wall of the adjusting ring 77, one side of the top end of the chuck 71 is rotatably and alternately provided with a rotating shaft 78, one side thread of the top end of the sliding cylinder 76 is alternately provided with a lead screw 79, the top end of the lead screw 78, pressure is applied to the arc-shaped plate 52 through the spring 54 in the limiting component 5, when the rotating main shaft body 4 is driven by the main shaft rotor 2 to rotate at a high speed, the balls 53 on the arc-shaped plate 52 transmit the pressure to the main shaft body 4 under the condition that the normal rotation of the main shaft body 4 is not influenced, so that the main shaft body 4 is always kept at one position to rotate, the main shaft body 4 is prevented from deviating when rotating, the processing precision is improved, the rotating shaft 78 in the clamping component 7 drives the screw rod 79 to rotate, the screw rod 79 drives the sliding cylinder 76 to slide on the positioning column 75, the adjusting ring 77 is driven to move up and down, and then the four triangular blocks 73 are driven to synchronously move on the sliding groove 72, so that the clamping blocks 74 clamp and fix workpieces or tools with various sizes, and the workpieces or tools are ensured to coaxially rotate with the main shaft body 4.

Preferably, an anti-skid handle 8 is fixedly installed at the top end of the rotating shaft 78, the rotating shaft 78 is conveniently rotated through the anti-skid handle 8, four connecting screw rods 9 distributed in an annular shape are installed on the top end of the flange 6 in a threaded penetrating manner, the head ends of the four connecting screw rods 9 penetrate through the top end of the chuck 71 in a threaded manner, the whole clamping assembly 7 is conveniently installed and disassembled through the connecting screw rods 9 for maintenance and waste chip removal, a sealing plate 10 is fixedly installed at the bottom end of the shaft sleeve 3, a through hole 11 is formed in the middle of the sealing plate 10, a through hole 11 is formed in the bottom of the main shaft body 4, a double-lip oil seal 12 is fixedly embedded inside the through hole 11, the inner ring of the double-lip oil seal 12 is in sliding contact with the bottom of the main shaft body 4, waste chips are prevented from entering the shaft sleeve 3 from the bottom end of the shaft sleeve 3 to damage the bearing 18 through the sealing plate 10 and the double-lip oil seal 12, an oil inlet 13 is formed in the other side of the shaft sleeve 3, and lubricating oil is added through the oil inlet 13, the oil outlet 14 has all been seted up with the bottom of inner wall opposite side in the middle part of axle sleeve 3 inner wall opposite side, through oil passageway 15 intercommunication between two oil outlet 14 and the inlet port 13, lubricate in leading-in bearing 18 of lubricating oil through oil passageway 15 and oil outlet 14, and sealing plug 16 is installed to the block on the inlet port 13, prevents through sealing plug 16 that dust or sweeps from getting into inlet port 13, further improves the leakproofness.

When the numerically-controlled machine tool spindle is used specifically, a workpiece or a tool to be clamped and fixed is firstly placed between four clamping blocks 74 in a clamping assembly 7, an anti-slip handle 8 is rotated to drive a rotating shaft 78 to rotate, the rotating shaft 78 drives a screw rod 79 to rotate, the screw rod 79 drives a sliding cylinder 76 to slide on a positioning column 75, a regulating ring 77 is driven to move up and down, four triangular blocks 73 are further driven to move synchronously on a sliding chute 72, the clamping blocks 74 clamp and fix workpieces or tools with various sizes, the workpiece or the tool is ensured to rotate coaxially with a spindle body 4, then lubricating oil is added through an oil inlet 13, the lubricating oil is guided into a bearing 18 through an oil channel 15 and an oil outlet 14 for lubrication, a sealing plate 10 and a double-lip oil seal 12 prevent scraps from entering the shaft sleeve 3 from the bottom end of the shaft sleeve 3 to damage the bearing 18, a sealing plug 16 is installed to prevent dust or scraps from entering the oil inlet 13, further improve the leakproofness, the digit control machine tool is restarted, main shaft rotor 2 drives main shaft body 4 through connecting piece 17 and carries out high-speed rotation, spring 54 in the spacing subassembly 5 exerts pressure to arc 52, ball 53 on the arc 52 gives main shaft body 4 with pressure transmission under the condition that does not influence main shaft body 4 normal pivoted, make main shaft body 4 remain throughout and rotate in a position, prevent that main shaft body 4 from taking place the skew when rotating, machining precision is improved, at last after finishing, through connecting screw 9 easy to assemble dismantlement whole centre gripping subassembly 7, maintain the operation of changing or clearance sweeps.

In the description of the present invention, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

In the present invention, unless otherwise explicitly specified or limited, for example, it may be fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The numerical control machine tool spindle comprises a spindle box (1) and is characterized in that a spindle rotor (2) is installed on the top end of the spindle box (1) in a rotating and inserting mode, an axle sleeve (3) is installed on the bottom end of the spindle box (1) in a fixed and inserting mode, a spindle body (4) is installed on the middle portion of the inner wall of the axle sleeve (3) and the bottom of the inner wall of the axle sleeve (3) in a rotating mode through four bearings (18), the bottom end of the spindle rotor (2) is fixedly connected with the top end of the spindle body (4) through a connecting piece (17), a limiting assembly (5) is arranged inside the axle sleeve (3), the limiting assembly (5) comprises four telescopic rods (51) distributed in an annular mode, the four telescopic rods (51) are fixedly arranged at the top of the inner wall of the axle sleeve (3), an arc-shaped plate (52) is fixedly installed at one end of the four telescopic rods (51), and a plurality of balls (53) are respectively embedded in the inner side of the arc-shaped plate (52) in a rolling mode, a plurality of the balls (53) are in rolling contact with the top of the main shaft body (4), four springs (54) are fixedly mounted on the outer sides of the arc plates (52), one ends of the four springs (54) are fixedly connected with the top of the inner wall of the shaft sleeve (3), a flange (6) is fixedly mounted at the bottom end of the main shaft body (4), a clamping assembly (7) is arranged at the bottom end of the flange (6), the clamping assembly (7) comprises a hollow chuck (71), the chuck (71) is arranged at the bottom end of the flange (6), four sliding grooves (72) distributed in an annular shape are formed in the bottom end of the chuck (71), triangular blocks (73) are slidably mounted in the four sliding grooves (72), clamping blocks (74) are fixedly mounted at the bottom ends of the triangular blocks (73), and positioning columns (75) are fixedly mounted at the top ends of the inner wall of the chuck (71), sliding sleeve is equipped with slide cartridge (76) on reference column (75), the bottom fixed mounting of slide cartridge (76) inner wall has adjustable ring (77), four the top in three hornblocks (73) outsides all with the inner wall sliding contact of adjustable ring (77), pivot (78) are installed to one side rotation interlude on chuck (71) top, lead screw (79) are installed to one side screw thread interlude on slide cartridge (76) top, the top of lead screw (79) and the bottom fixed connection of pivot (78).

2. The numerical control machine tool spindle according to claim 1, characterized in that: the top end of the rotating shaft (78) is fixedly provided with an anti-slip handle (8).

3. The numerical control machine tool spindle according to claim 1, characterized in that: four connecting screw rods (9) which are distributed annularly are arranged on the top end of the flange (6) in a threaded penetrating manner, and the top ends of the chucks (71) are penetrated by the head ends of the connecting screw rods (9) in an equal threaded manner.

4. The numerical control machine tool spindle according to claim 1, characterized in that: the bottom fixed mounting of axle sleeve (3) has closing plate (10), through-hole (11) have been seted up at the middle part of closing plate (10), through-hole (11) are run through to the bottom of main shaft body (4), the inside fixed embedding of through-hole (11) is equipped with two lip oil seals (12), the inner circle of two lip oil seals (12) and the bottom sliding contact of main shaft body (4).

5. The numerical control machine tool spindle according to claim 1, characterized in that: and an oil inlet hole (13) is formed in the other side of the shaft sleeve (3).

6. The numerical control machine tool spindle according to claim 5, characterized in that: oil outlet holes (14) are formed in the middle of the other side of the inner wall of the shaft sleeve (3) and in the bottom of the other side of the inner wall, and the two oil outlet holes (14) are communicated with the oil inlet hole (13) through oil channels (15).

7. The numerical control machine tool spindle according to claim 5, characterized in that: and a sealing plug (16) is clamped and installed on the oil inlet hole (13).