CN214946364U

CN214946364U - Main shaft sealing structure of processing machine tool

Info

Publication number: CN214946364U
Application number: CN202121302795.3U
Authority: CN
Inventors: 蔡晶; 仇启龙; 蔡国庆; 冯学胜; 王超
Original assignee: NANJING NINGQING CNC MACHINE TOOL MANUFACTURE CO Ltd
Current assignee: NANJING NINGQING CNC MACHINE TOOL MANUFACTURE CO Ltd
Priority date: 2021-06-10
Filing date: 2021-06-10
Publication date: 2021-11-30
Anticipated expiration: 2031-06-10

Abstract

The application relates to a spindle sealing structure of a special processing machine tool, which is applied to the technical field of special processing machine tools and comprises a blocking piece arranged between a bearing plate and a supporting frame, wherein a spindle penetrates through the blocking piece; the barrier piece comprises an upper isolation cylinder and a lower isolation cylinder, the upper isolation cylinder is sleeved on the bearing plate, one end of the lower isolation cylinder is fixed on the support frame, and the other end of the lower isolation cylinder extends into the upper isolation cylinder. This application can reach the effect of separation electrolyte through the separation piece to the condition that reduces electrolyte and main shaft contact takes place, can also block the fog that electrolyte produced, and the further condition that reduces electrolyte and corrode the main shaft takes place, takes place in order to guarantee the structural stability of main shaft.

Description

Main shaft sealing structure of processing machine tool

Technical Field

The utility model belongs to the technical field of machine tool technique and specifically relates to a main shaft seal structure of machine tool is related to.

Background

An electrochemical machining machine tool is a special machining method for machining and shaping a workpiece by utilizing the principle that metal generates electrochemical anode dissolution in electrolyte.

During machining, the workpiece is connected with the positive pole of a direct current power supply, the tool is connected with the negative pole, and a small gap is kept between the two poles. The electrolyte flows through the interelectrode gap to form a conductive path between the two electrodes, and generates a current under a power supply voltage, thereby forming electrochemical anodic dissolution. With the continuous feeding of the tool relative to the workpiece, the metal of the workpiece is continuously electrolyzed, the electrolysis product is continuously washed away by the electrolyte, finally, the gaps at all positions between the two electrodes tend to be consistent, and the surface of the workpiece is formed into a shape basically similar to the working surface of the tool.

Referring to fig. 6, a spindle structure of an electrolytic processing machine tool in the related art includes a spindle 2 and a bearing plate 1, so as to fix a support frame 3 of the spindle 2, and the spindle 2 is rotatably connected to the support frame 3, and the spindle 2 structure conducts electricity to the bearing plate 1 through the spindle 2 in a processing process.

In view of the above-mentioned related technologies, the inventor believes that the machine tool needs to use an electrolyte during machining, and at this time, the electrolyte is likely to contact with the spindle, so that the electrolyte is likely to corrode the spindle, and the mechanical stability of the spindle is affected.

SUMMERY OF THE UTILITY MODEL

In order to improve the problem that electrolyte and main shaft contact, corrode the main shaft easily, this application provides a machine tool's main shaft seal structure.

The application provides a main shaft seal structure of machine tool adopts following technical scheme:

a main shaft sealing structure of a processing machine tool comprises a blocking piece arranged between a bearing plate and a supporting frame, wherein a main shaft penetrates through the blocking piece; the barrier piece comprises an upper isolation cylinder and a lower isolation cylinder, the upper isolation cylinder is sleeved on the bearing plate, one end of the lower isolation cylinder is fixed on the support frame, and the other end of the lower isolation cylinder extends into the upper isolation cylinder.

Through adopting above-mentioned technical scheme, in the in-process of processing, electrolyte flows downwards from the loading board, go up this moment and keep apart a section of thick bamboo and block electrolyte, make electrolyte be by drippage downwards along the outside of last isolation section of thick bamboo, keep apart a section of thick bamboo and do further blockking to electrolyte down simultaneously, in order to reach the effect of separation electrolyte, thereby it takes place to reduce the condition of electrolyte and main shaft contact, and keep apart a section of thick bamboo down and can also keep off the fog that electrolyte produced, further reduce the condition emergence of electrolyte corrosion main shaft, in order to guarantee the structural stability of main shaft.

Optionally, one end of the lower isolation cylinder, which is far away from the support frame, is provided with a shielding ring which extends inwards; the shielding ring comprises a check ring and a connecting ring, the outer edge of the connecting ring is connected with the lower isolation cylinder, the check ring is connected to the inner edge of the connecting ring, and the check ring extends towards one side of the connecting ring, which faces the supporting plate.

Through adopting above-mentioned technical scheme, set up the retaining ring and can do further to block to the fog that electrolyte produced to the retaining ring can increase the space between last isolation section of thick bamboo and the isolation section of thick bamboo down, thereby extension fog is at the floating time between last isolation section of thick bamboo and retaining ring, and then reduces the buoyancy of fog, makes fog detain between last isolation section of thick bamboo and retaining ring, and the condition that further reduces the fog entering down in the isolation section of thick bamboo takes place.

Optionally, one side of the connecting ring, which is far away from the lower isolating cylinder, is inclined towards the bearing plate.

Through adopting above-mentioned technical scheme, when the fog that electrolyte produced is detained between last isolation cylinder and retaining ring, the fog falls to the go-between and gathers into the water droplet, and the go-between of slope this moment can carry out the drainage to the water droplet for the water droplet flows along the lateral wall of isolating cylinder down, takes place with the condition that reduces water droplet deposit on the go-between.

Optionally, an isolation ring is arranged on one side, facing the support frame, of the bearing plate, and the isolation ring is located between the retainer ring and the upper isolation cylinder.

By adopting the technical scheme, the complexity of the path between the upper isolation cylinder and the check ring can be increased by arranging the isolation ring, so that the fog generated by the electrolyte is further blocked, the floating force of the fog is reduced, and the condition that the fog enters the lower isolation cylinder is further reduced.

Optionally, the distance between the isolation ring and the upper isolation cylinder is greater than the distance between the isolation ring and the retainer ring.

Through adopting above-mentioned technical scheme, the distance is great between isolation ring and the last isolation cylinder, can prolong the showy time of fog to weaken the buoyancy of fog, and then promote the separation effect of isolation ring to fog.

Optionally, a boss is arranged in the lower isolation cylinder of the support frame.

Through adopting above-mentioned technical scheme, set up the height that the boss can increase the support frame in the isolation section of thick bamboo down, when electrolyte gets into down through the clearance between isolation section of thick bamboo and the support frame down in the isolation section of thick bamboo, the boss can block electrolyte to the condition emergence in the isolation section of thick bamboo under the reduction electrolyte infiltration, the condition that corrodes the main shaft takes place in order to reduce electrolyte.

Optionally, a positioning ring is arranged on one side of the boss, which is far away from the support frame, along the peripheral direction.

Through adopting above-mentioned technical scheme, set up the separation height that the holding ring can increase the boss, the condition emergence in the isolation section of thick bamboo under the further electrolyte infiltration of reduction.

Optionally, a driving sleeve is sleeved on the main shaft, the driving sleeve is rotatably connected to the supporting frame, and a conductive plate used for being connected with the driving sleeve is arranged between the main shaft and the bearing plate.

Through adopting above-mentioned technical scheme, it can electrolyte block to set up the driving sleeve to the condition that reduces electrolyte and main shaft contact takes place, and the current conducting plate can increase the leakproofness between driving sleeve and the main shaft this moment, takes place with the condition that reduces the fog that electrolyte produced and corrodes the main shaft in getting into the driving sleeve, and the current conducting plate can increase the firm in connection nature between main shaft and the driving sleeve simultaneously.

Optionally, the driving sleeve is equipped with insulating backing plate towards the one end of current conducting plate, insulating backing plate is including setting up the insulation board between driving sleeve and current conducting plate, and set up solid fixed ring between driving sleeve and the main shaft, gu fixed ring sets up the one side that deviates from the current conducting plate at the insulation board, set up the through-hole that supplies the main shaft to pass on the insulation board.

Through adopting above-mentioned technical scheme, at the in-process of connecting the main shaft, the operator is fixed in the drive with the current conducting plate together with the insulation board on sheathe in, the insulation board is filled up the clearance between connecting block and the drive cover this moment, thereby increase the leakproofness between current conducting plate and the drive plate, solid fixed ring pegs graft between main shaft and drive cover simultaneously, the inner wall of drive cover and the laminating of solid fixed ring's outside wall this moment, the lateral wall of main shaft and the laminating of solid fixed ring's inside wall, thereby gu fixed ring fills up the clearance between drive cover and the main shaft, and then increase the leakproofness between main shaft and the drive cover, the condition that the fog that further reduces electrolyte production got into the main shaft and corrodes the main shaft takes place between the drive cover, in order to guarantee the structural stability of main shaft.

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

1. the effect of blocking the electrolyte can be achieved through the blocking piece, so that the contact condition of the electrolyte and the main shaft is reduced, the fog generated by the electrolyte can be blocked, the corrosion condition of the electrolyte on the main shaft is further reduced, and the structural stability of the main shaft is ensured;

2. the space between the upper isolation cylinder and the lower isolation cylinder can be enlarged through the blocking ring, so that the floating time of mist between the upper isolation cylinder and the blocking ring is prolonged, the floating force of the mist is reduced, the mist is retained between the upper isolation cylinder and the blocking ring, and the condition that the mist enters the lower isolation cylinder is further reduced;

3. can increase the leakproofness between driving sleeve and the main shaft through the current-conducting plate to the fog that reduces electrolyte and produce gets into the condition emergence of corroding the main shaft in the driving sleeve, and the current-conducting plate can increase the fastness of being connected between main shaft and the driving sleeve.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present application.

Fig. 2 is a sectional view taken along line a-a of fig. 1.

Fig. 3 is an enlarged schematic view of a portion a in fig. 2.

Fig. 4 is a schematic structural diagram for embodying the insulating pad according to the embodiment of the present application.

Fig. 5 is an enlarged schematic view of a portion B in fig. 4.

Fig. 6 is a perspective view of a spindle structure of the related art.

Description of reference numerals: 1. a carrier plate; 2. a main shaft; 3. a support frame; 31. a support plate; 311. a boss; 312. a positioning ring; 32. a supporting seat; 4. a barrier; 41. an upper isolation cylinder; 42. a lower isolation cylinder; 43. a shield ring; 431. a retainer ring; 432. a connecting ring; 44. an isolation ring; 45. a seal ring; 5. a drive sleeve; 6. a conductive plate; 61. an insulating bushing; 7. an insulating base plate; 71. an insulating plate; 711. a through hole; 712. a limiting groove; 72. a fixing ring; 73. a limit ring.

Detailed Description

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

The embodiment of the application discloses main shaft seal structure of machine tool.

Referring to fig. 1 and 2, the spindle sealing structure includes a support frame 3, and a spindle 2, a bearing plate 1 and a blocking member 4 which are disposed on the support frame 3, the support frame 3 includes a support plate 31 fixed on the machine tool body, and a support seat 32 penetrating the support plate 31, and the support seat 32 is fixed on the support plate 31 by a countersunk head bolt. The main shaft 2 penetrates through and is rotatably connected to the supporting seat 32, the bearing plate 1 is arranged on the upper end face of the main shaft 2, and the bearing plate 1 and the main shaft 2 are coaxial. The blocking member 4 is disposed between the carrier plate 1 and the supporting plate 31, and the spindle 2 is inserted into the blocking member 4. During machining, the barrier 4 blocks the electrolyte, thereby reducing the possibility of contact between the electrolyte and the spindle 2 and reducing the occurrence of corrosion of the spindle 2 by the electrolyte.

Referring to fig. 2 and 3, the blocking member 4 includes an upper isolation cylinder 41, a lower isolation cylinder 42, a shielding ring 43, and an isolation ring 44, and the upper isolation cylinder 41 and the lower isolation cylinder 42 are both circular cylinders. The upper isolation cylinder 41 is sleeved on the bearing plate 1 and is fixedly connected with the bearing plate 1 through a bolt. The lower isolation cylinder 42 is fixed on the support plate 31 by bolts, and one end of the lower isolation cylinder 42 far away from the support plate 31 extends into the upper isolation cylinder 41 to be overlapped with part of the upper isolation cylinder 41. During the process, the electrolyte flows down along the carrier plate 1, so that the electrolyte drops down along the lower separation cylinder 42. The lower isolation cylinder 42 blocks the electrolyte to reduce the flow of the electrolyte into the lower isolation cylinder 42. And the lower isolation cylinder 42 may further block the mist generated from the electrolyte to reduce the contact of the mist with the spindle 2.

Referring to fig. 2 and 3, the shielding ring 43 is disposed on a side of the lower insulating cylinder 42 away from the support plate 31 and away from the upper insulating cylinder 41. The shielding ring 43 comprises a connecting ring 432 and a retaining ring 431, the connecting ring 432 is in a ring plate shape, the outer edge of the connecting ring 432 is arranged on the inner wall of the lower isolation cylinder 42 close to one end of the bearing plate 1, one side of the connecting ring 432 far away from the lower isolation cylinder 42 inclines towards the bearing plate 1, and the connecting ring 432 and the lower isolation cylinder 42 are integrally formed. The retainer ring 431 has an annular cylindrical shape, the retainer ring 431 is provided on an inner edge of the connecting ring 432, and the retainer ring 431 and the connecting ring 432 are integrally formed, and an outer side wall of the retainer ring 431 and an outer side wall of the lower separation cylinder 42 are parallel to each other.

While the collar 431 extends toward the side of the connection ring 432 facing the carrier plate 1 to extend the height of the lower isolation cylinder 42. The baffle 431 increases the space between the lower isolation cylinder 42 and the upper isolation cylinder 41, so that the floating time of the mist generated by the electrolyte between the baffle 431 and the upper isolation cylinder 41 can be prolonged, and the floating force of the mist is weakened, so that the mist is retained between the baffle 431 and the upper isolation cylinder 41. Meanwhile, the retaining ring 431 further blocks the mist to reduce the mist entering the lower isolation cylinder 42. At this time, the mist is easily condensed on the connection ring 432 to form water drops and flows down along the connection ring 432, so as to reduce the possibility of water accumulation on the connection ring 432.

Referring to fig. 2 and 3, the spacer 44 is in the form of an annular cylinder and is fixed to the side of the bearing plate 1 facing the connection ring 432 by bolts. The isolation ring 44 is disposed between the upper isolation cylinder 41 and the retainer ring 431, and the isolation ring 44, the retainer ring 431 and the upper isolation cylinder 41 are coaxial. Part of the retainer ring 431 coincides with the spacer ring 44, so that the spacer ring 44 increases the complexity of the path between the upper separation cylinder 41 and the retainer ring 431 to increase the difficulty of the mist floating between the retainer ring 431 and the upper separation cylinder 41. And the distance between the isolation ring 44 and the upper isolation cylinder 41 is larger than the distance between the isolation ring 44 and the retainer ring 431, so that the floating time of the mist between the upper isolation cylinder 41 and the isolation ring 44 is increased, and the floating force of the mist is weakened, so that the isolation ring 44 can block the mist.

Referring to fig. 2 and 3, one end of each of the upper isolation cylinder 41 and the isolation ring 44, which is far away from the bearing plate 1, is sleeved with a sealing ring 45 along the circumferential direction, and the sealing ring 45 is made of a rubber material, so that the rubber itself is softer and can have elasticity, and deformation is generated. And the sealing ring 45 sleeved on the upper isolation cylinder 41 is contacted with the outer side wall of the lower isolation cylinder 42, so that the gap between the upper isolation cylinder 41 and the lower isolation cylinder 42 is filled, and the sealing performance between the upper isolation cylinder 41 and the lower isolation cylinder 42 is further improved, thereby reducing the occurrence of the condition that the mist generated by the electrolyte enters the lower isolation cylinder 42. Meanwhile, the sealing ring 45 sleeved on the isolating ring 44 is attached to the outer side wall of the retaining ring 431, so that the sealing performance between the isolating ring 44 and the retaining ring 431 is improved, and the condition that fog enters the lower isolating cylinder 42 is further reduced.

Referring to fig. 2, a circular boss 311 is provided on a side of the support plate 31 facing the carrier plate 1, and the boss 311 is integrally formed with the support plate 31. The lower isolation cylinder 42 is coaxial with the boss 311, and the lower isolation cylinder 42 is sleeved outside the boss 311. The height of the support plate 31 is increased by the bosses 311, so that a connection gap between the lower isolation cylinder 42 and the support plate 31 can be shielded, and the occurrence of the situation that electrolyte permeates into the lower isolation cylinder 42 is reduced. Meanwhile, a positioning ring 312 is disposed on one side of the boss 311 facing the carrier plate 1, and the positioning ring 312 is fixed on the support plate 31 by a countersunk bolt. The diameter of the positioning ring 312 is the same as that of the boss 311, so that the height of the boss 311 can be increased, and the penetration of the electrolyte into the lower separation cylinder 42 and the contact with the spindle 2 can be further reduced.

Referring to fig. 2 and 4, the support seat 32 is axially provided with the driving sleeve 5, and the driving sleeve 5 is rotatably connected to the support seat 32 through a bearing. The main shaft 2 is arranged in the driving sleeve 5 in a penetrating way, and the main shaft 2 and the driving sleeve 5 are coaxial. A current-conducting plate 6 is arranged between the main shaft 2 and the bearing plate 1, the current-conducting plate 6 is fixed on the main shaft 2 through a countersunk head bolt, and the bearing plate 1 is fixed on the current-conducting plate 6 through a countersunk head bolt. Simultaneously, the current-conducting plate 6 is fixed at one end, facing the bearing plate 1, of the driving sleeve 5 through the countersunk head bolt so as to achieve the effect of fixing the main shaft 2, so that the connection firmness between the main shaft 2 and the driving sleeve 5 is increased, and the structural strength of the main shaft 2 is further increased.

Referring to fig. 4 and 5, an insulating bushing 61 is sleeved on the countersunk head bolt connected to the driving sleeve 5, and the insulating bushing 61 is inserted into the conductive plate 6 to insulate and isolate the countersunk head bolt from the conductive plate 6.

Referring to fig. 4 and 5, an insulating pad 7 is disposed between the driving sleeve 5 and the conductive plate 6, the insulating pad 7 includes an insulating plate 71, a stopper ring 73, and a fixing ring 72, and the fixing ring 72 and the insulating plate 71 are integrally formed. The insulating plate 71 is disposed between the conductive plate 6 and the driving sleeve 5, and at this time, the insulating plate 71 may fill a gap between the conductive plate 6 and the driving sleeve 5 to increase the sealing performance between the conductive plate 6 and the driving sleeve 5, so as to reduce the occurrence of the situation that the mist enters between the driving sleeve 5 and the spindle 2 to corrode the spindle 2. One side of the insulating plate 71 facing the conductive plate 6 is provided with a limiting groove 712 having the same size as the conductive plate 6, and the conductive plate 6 is embedded in the limiting groove 712, at this time, the limiting groove 712 increases the contact area between the conductive plate 6 and the insulating plate 71, and further increases the sealing performance between the conductive plate 6 and the insulating plate 71.

Referring to fig. 4 and 5, the stopper ring 73 is fitted over the conductive plate 6, and the stopper ring 73 is fixed to the insulating plate 71 by a countersunk head bolt. At this time, the spacing ring 73 may increase a contact area between the insulating plate 71 and the conductive plate 6, thereby increasing sealability between the conductive plate 6 and the insulating plate 71 to reduce the occurrence of the corrosion of the conductive plate 6 by the mist generated from the electrolyte. And the spacing ring 73 may be provided in plural, one in this embodiment, in the axial direction of the conductive plate 6, so as to seal the conductive plates 6 of different thicknesses.

Referring to fig. 4 and 5, the insulating plate 71 has a through hole 711 on the bottom wall of the limiting groove 712 for the spindle 2 to pass through, and the inner wall of the through hole 711 is attached to the outer wall of the spindle 2. The fixing ring 72 is disposed on a side of the insulating plate 71 away from the conductive plate 6, and the fixing ring 72 is inserted between the driving sleeve 5 and the main shaft 2, so as to fasten the driving sleeve 5 and the main shaft 2. Simultaneously, the inner side wall of the fixing ring 72 is flush with the inner side wall of the through hole 711, the inner side wall of the fixing ring 72 is attached to the inner side wall of the main shaft 2, the outer side wall of the fixing ring 72 is attached to the inner side wall of the driving sleeve 5, the fixing ring 72 fills a gap between the main shaft 2 and the driving sleeve 5, the sealing performance between the driving sleeve 5 and the main shaft 2 is further improved, and the situation that fog enters the main shaft 2 and corrodes the main shaft 2 between the driving sleeve 5 is further reduced.

The implementation principle of the spindle sealing structure of the processing machine tool in the embodiment of the application is as follows: during the process, the electrolyte flows downwards from the carrier plate 1. The electrolyte may drop down along the upper separation cylinder 41 at this time, and the lower separation cylinder 42 blocks the electrolyte. The lower isolation cylinder 42 provides a further barrier to the electrolyte as it creates a mist. Meanwhile, mist generated by the electrolyte can float between the retainer ring 431 and the upper isolation cylinder 41, so that the floating force of the mist is weakened, and the isolation ring 44 further blocks the mist to reduce the occurrence of the condition that the mist enters the lower isolation cylinder 42. Finally, the driving sleeve 5 can further block the fog so as to reduce the contact between the fog and the main shaft 2 and corrode the main shaft 2, and ensure the structural stability of the main shaft 2.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a main shaft seal structure of machine tool which characterized in that: the device comprises a blocking part (4) arranged between a bearing plate (1) and a support frame (3), wherein a main shaft (2) penetrates through the blocking part (4);

the barrier piece (4) comprises an upper isolation cylinder (41) and a lower isolation cylinder (42), the upper isolation cylinder (41) is sleeved on the bearing plate (1), one end of the lower isolation cylinder (42) is fixed on the support frame (3), and the other end of the lower isolation cylinder extends into the upper isolation cylinder (41).

2. The spindle seal structure of a processing machine tool according to claim 1, characterized in that: one end of the lower isolation cylinder (42) far away from the support frame (3) is provided with a shielding ring (43) extending inwards;

the shielding ring (43) comprises a retainer ring (431) and a connecting ring (432), the outer edge of the connecting ring (432) is connected with the lower isolating cylinder (42), the retainer ring (431) is connected to the inner edge of the connecting ring (432), and the retainer ring (431) extends towards one side of the connecting ring (432) facing the support plate (31).

3. The spindle seal structure of a processing machine tool according to claim 2, characterized in that: the side of the connecting ring (432) far away from the lower isolating cylinder (42) inclines towards the bearing plate (1).

4. The spindle seal structure of a processing machine tool according to claim 2, characterized in that: one side of the bearing plate (1) facing the support frame (3) is provided with an isolation ring (44), and the isolation ring (44) is positioned between the retainer ring (431) and the upper isolation cylinder (41).

5. The spindle seal structure of a processing machine tool according to claim 4, characterized in that: the distance between the isolation ring (44) and the upper isolation cylinder (41) is larger than the distance between the isolation ring (44) and the retaining ring (431).

6. The spindle seal structure of a processing machine tool according to claim 1, characterized in that: the support frame (3) is provided with a boss (311) in the lower isolation cylinder (42).

7. The spindle seal structure of a processing machine tool according to claim 6, characterized in that: and a positioning ring (312) is arranged on one side of the boss (311) far away from the support frame (3) along the peripheral direction.

8. The spindle seal structure of a processing machine tool according to claim 1, characterized in that: the main shaft (2) is sleeved with a driving sleeve (5), the driving sleeve (5) is rotatably connected to the supporting frame (3), and a conductive plate (6) used for being connected with the driving sleeve (5) is arranged between the main shaft (2) and the bearing plate (1).

9. The spindle seal structure of a processing machine tool according to claim 8, characterized in that: driving sleeve (5) are equipped with insulating backing plate (7) towards the one end of current conducting plate (6), insulating backing plate (7) are including setting up insulation board (71) between driving sleeve (5) and current conducting plate (6), and set up and be in solid fixed ring (72) between driving sleeve (5) and main shaft (2), gu fixed ring (72) set up the one side that deviates from current conducting plate (6) in insulation board (71), set up through-hole (711) that supply main shaft (2) to pass on insulation board (71).