Machine tool tailstock for fixing machine tool center

Abstract

The utility model relates to the technical field of machine tool tail seats, and discloses a machine tool tail seat for fixing a machine tool centre, which comprises a machine tool tail seat arranged on a machine tool sliding rail, a tail seat sleeve is arranged in the machine tool tail seat in a front-back sliding mode, and a cambered surface rubber head for sealing is fixedly arranged at the tail end of the centre. The front end of the tailstock sleeve is provided with an inserting cavity which is consistent with the rear section of the tip in shape and used for inserting the tip, the rear end of the inserting cavity is in threaded airtight connection with a necking ring, and a rubber sealing ring is fixedly arranged on the front end face of the necking ring and used for abutting against a cambered surface rubber head for sealing. After the center is plugged into the inserting cavity, the cambered surface rubber head for sealing abuts against the rubber sealing ring and blocks a hole in the middle of the necking ring to form sealing, then the adjusting screw rod is rotated to reduce air pressure in the air channel, the center is adsorbed, and the center can be firmly fixed into the inserting cavity.

Description

Technical Field

[0001] The utility model relates to the technical field of machine tool tailstocks, in particular to a machine tool tailstock for fixing the top of a machine tool. Background Art

[0002] The existing patent publication number (CN219484225U) discloses a CNC lathe fixed center positioning device, including a fixed seat, a mounting groove is provided inside the fixed seat, a fixed shaft is slidably connected to the inner wall of the mounting groove, a center is fixedly connected to the bottom end of the fixed shaft, a slot is provided on the upper part of the outer wall of the fixed shaft, a positioning mechanism is provided on the inner wall of the slot, and the positioning mechanism is slidably connected to the upper part of the outer wall of the fixed seat. In the above utility model, after the fixed shaft is inserted into the fixed seat, the positioning mechanism is pushed inward so that the positioning mechanism is stuck in the slot on the upper part of the fixed shaft, and then the positioning mechanism is fixed to the fixed seat by bolts, thereby solving the problem that in the production process, when producing different workpieces and dealing with workpieces of different sizes, the appropriate center needs to be frequently replaced, which makes the center installation process very inconvenient;

[0003] However, its structural design is extremely complex, and it is not convenient to replace. It runs counter to the existing technical design structure and does not meet the existing machine tool tailstock design requirements at all. Utility Model Content

[0004] The technical problem to be solved by the utility model is: in order to overcome the above problems, a machine tool tailstock for fixing the center of a machine tool is provided, which solves the above problems.

[0005] The utility model solves the technical problem by adopting the following technical solutions:

[0006] A machine tool tailstock for fixing a machine tool center, comprising a machine tool tailstock arranged on a machine tool slide rail, a tailstock sleeve being provided in the machine tool tailstock for sliding back and forth, a sealing curved rubber head being fixedly provided at the tail end of the center, and an insertion cavity having a shape consistent with the rear section of the center for insertion of the center at the front end of the tailstock sleeve for threading a necking ring being connected airtightly at the rear end of the insertion cavity, a rubber sealing ring being fixedly provided on the front end surface of the necking ring for abutting against the sealing curved rubber head, the necking ring connecting the insertion cavity with an air passage arranged in the tailstock sleeve, and an air cylinder connected with the air passage being fixedly provided at the upper end of the tailstock sleeve by welding. A screw hole seat is fixedly provided at the upper end of the gas cylinder, and an adjusting screw is threadedly connected to the screw hole seat, and an airtight plug is fixedly provided at the lower end of the adjusting screw and a piston head installed in the gas cylinder. When the top tip is inserted into the insertion cavity, the sealing arc rubber head is pressed against the rubber sealing ring and blocks the hole in the middle of the necking ring to form a seal, and then the adjusting screw is rotated to reduce the air pressure in the airway, thereby adsorbing the top tip so that the top tip can be firmly fixed in the insertion cavity. Such a structure is very convenient for fixing the top tip and is also very convenient for replacement. Unlike mechanical fixation, the air pressure fixation used in this application will not cause scratches on the outer surface of the top tip.

[0007] Preferably, in order to save more effort when rotating the adjusting screw, a force-adding screw rod perpendicular to the axis of the adjusting screw is fixedly provided at the upper end of the adjusting screw.

[0008] Preferably, a grease partition is fixedly provided in the air cylinder, and the grease partition is composed of two metal meshes and a non-woven fabric sandwiched between the metal meshes. Grease is coated on the inner wall of the air cylinder to reduce the friction of the piston head, improve the air tightness and the smoothness of the movement of the piston head. The grease partition has the property of being breathable and can prevent the emulsion grease from flowing into the airway and causing rapid loss, thereby increasing the effective lubrication time of the grease.

[0009] Preferably, a front top surface rubber gasket is fixedly provided on the front end surface of the tailstock sleeve. When the top point is inserted into place, the step surface of the top point abuts against the front top surface rubber gasket, and as the air cylinder sucks the top point in, its step surface and the front top surface rubber gasket are pressed tightly together, which effectively ensures the stability of the top point and avoids scratches on the outer surface of the top point.

[0010] Preferably, an adjustment slot is provided on the tailstock of the machine tool for the locker to extend out, and when the tailstock sleeve moves forward and backward relative to the tailstock of the machine tool, the locker can be adjusted forward and backward in the adjustment slot without obstacle.

[0011] The advantages and positive effects of the present invention are: when the top tip is inserted into the insertion cavity and the sealing arc rubber head is pressed against the rubber sealing ring and blocks the hole in the middle of the necking ring to form a seal, the adjusting screw is then rotated to reduce the air pressure in the airway, thereby adsorbing the top tip so that the top tip can be firmly fixed in the insertion cavity. Such a structure is very convenient for fixing the top tip and is also very convenient for replacement. Unlike mechanical fixation, the present application uses air pressure fixation which will not cause scratches on the outer surface of the top tip. Compared with the prior art, it is more convenient, reasonable and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0013] Figure 1 It is a structural schematic diagram of the utility model;

[0014] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0015] Figure 3 It is a schematic diagram of the internal structure of the utility model.

[0016] The marks in the accompanying drawings are described as follows: 10, center; 11, machine tailstock; 12, force rod; 13, tailstock sleeve; 14, adjustment groove; 15, lock; 16, curved rubber head for sealing; 17, insertion cavity; 18, front top rubber gasket; 19, adjusting screw; 20, screw hole seat; 21, air cylinder; 22, piston head; 23, grease partition; 24, airway; 25, neck shrink ring; 26, rubber sealing ring. DETAILED DESCRIPTION

[0017] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0018] The following is a further description of the embodiments of the present invention in conjunction with the accompanying drawings:

[0019] like Figure 1-3 As shown, the utility model discloses a machine tool tailstock for fixing the top of a machine tool, comprising a machine tool tailstock 11 arranged on a machine tool slide rail, in which a tailstock sleeve 13 is provided for sliding forward and backward movement (the connection structure between the machine tool tailstock 11 and the tailstock sleeve 13 is a prior art and will not be described in detail);

[0020] The improvement of the present application lies in that a sealing curved rubber head 16 is fixedly provided at the tail end of the top 10, and an insertion cavity 17 having the same shape as the rear section of the top 10 is provided at the front end of the tailstock sleeve 13 for insertion of the top 10, and a necking ring 25 is threadedly connected to the rear end of the insertion cavity 17 in an airtight manner, a rubber sealing ring 26 is fixedly provided on the front end surface of the necking ring 25 for abutting against the sealing curved rubber head 16, the necking ring 25 connects the insertion cavity 17 with an air passage 24 provided in the tailstock sleeve 13, and an air cylinder 21 connected to the air passage 24 is welded and fixedly provided at the upper end of the tailstock sleeve 13, a screw hole seat 20 is fixedly provided at the upper end of the air cylinder 21, and The screw hole seat 20 is threadedly connected with an adjusting screw 19, and a piston head 22 with an airtight plug installed in the air cylinder 21 is fixed at the lower end of the adjusting screw 19. When the top 10 is inserted into the insertion cavity 17, the sealing arc rubber head 16 is pressed against the rubber sealing ring 26 and blocks the hole in the middle of the necking ring 25 to form a seal. Then the adjusting screw 19 is rotated to reduce the air pressure in the airway 24, and then the top 10 is adsorbed so that the top 10 can be firmly fixed in the insertion cavity 17. Such a structure is very convenient for fixing the top 10 and is also very convenient for replacement. Unlike mechanical fixation, the air pressure fixation used in this application will not cause scratches on the outer surface of the top 10.

[0021] Preferably, in order to save more effort in turning the adjusting screw 19 , a force-applying screw rod 12 perpendicular to the axis of the adjusting screw 19 is fixedly provided at the upper end of the adjusting screw 19 .

[0022] Preferably, a grease partition plate 23 is fixedly provided in the air cylinder 21, and the grease partition plate 23 is composed of two metal meshes and a non-woven fabric sandwiched between the metal meshes. The inner wall surface of the air cylinder 21 is coated with grease to reduce the friction of the piston head 22, improve the air tightness and the smoothness of the movement of the piston head 22, and the grease partition plate 23 has the property of being breathable and can prevent the emulsion grease from flowing into the airway 24 and causing rapid loss, which can increase the effective lubrication time of the grease.

[0023] Preferably, a front top surface rubber gasket 18 is fixedly provided on the front end surface of the tailstock sleeve 13. When the top point 10 is inserted into place, the step surface of the top point 10 abuts against the front top surface rubber gasket 18, and as the air cylinder 21 sucks the top point 10 so that its step surface and the front top surface rubber gasket 18 are pressed together, the stability of the top point 10 is effectively guaranteed and scratches on the outer surface of the top point 10 are avoided.

[0024] Preferably, an adjustment slot 14 is provided on the machine tool tailstock 11 for the locker 15 to extend out (the mechanical structure composed of the air cylinder 21, the piston head 22, the adjustment screw 19, the screw hole seat 20, and the force twisting rod 12 is the locker 15). When the tailstock sleeve 13 moves forward and backward relative to the machine tool tailstock 11, the locker 15 can be adjusted forward and backward in the adjustment slot 14 without obstacles.

[0025] It should be emphasized that the embodiments described in the present invention are illustrative rather than restrictive. Therefore, the present invention is not limited to the embodiments described in the specific implementation manner. Any other implementation manners derived by those skilled in the art based on the technical solution of the present invention also fall within the scope of protection of the present invention.

Claims

1. A machine tool tailstock for fixing a machine tool center, comprising a machine tool tailstock (11) arranged on a machine tool slide rail, a tailstock sleeve (13) being arranged to slide back and forth in the machine tool tailstock (11), characterized in that: A sealing curved rubber head (16) is fixedly provided at the rear end of the top (10), and an insertion cavity (17) having a shape consistent with the rear section of the top (10) is provided at the front end of the tailstock sleeve (13) for insertion of the top (10), and a necking ring (25) is threadedly connected to the rear end of the insertion cavity (17) in an airtight manner, and a rubber sealing ring (26) is fixedly provided on the front end surface of the necking ring (25) for abutting against the sealing curved rubber head (16), and the necking ring (25) connects the insertion cavity (17) with an air passage (24) provided in the tailstock sleeve (13), and an air cylinder (21) connected to the air passage (24) is welded and fixedly provided at the upper end of the tailstock sleeve (13), and a screw hole seat (20) is fixedly provided at the upper end of the air cylinder (21), and the The screw hole seat (20) is internally threadedly connected to an adjusting screw (19), and a piston head (22) installed in the gas cylinder (21) is fixedly provided at the lower end of the adjusting screw (19). When the tip (10) is inserted into the insertion cavity (17), the sealing arc rubber head (16) is pressed against the rubber sealing ring (26) and blocks the hole in the middle of the necking ring (25) to form a seal. Then, the adjusting screw (19) is rotated to reduce the air pressure in the airway (24), thereby adsorbing the tip (10) so that the tip (10) can be firmly fixed in the insertion cavity (17). Such a structure is very convenient for fixing the tip (10) and is also very convenient for replacement. Unlike mechanical fixing, the air pressure fixing adopted in the present application will not cause scratches on the outer surface of the tip (10).

2. A machine tool tailstock for fixing a machine tool center according to claim 1, characterized in that: In order to save more effort when rotating the adjusting screw (19), a force-applying screw rod (12) perpendicular to the axis of the adjusting screw (19) is fixedly provided at the upper end of the adjusting screw (19).

3. A tailstock for a fixed machine tool center according to claim 2, characterized in that: A grease partition sheet (23) is fixedly provided in the air cylinder (21), and the grease partition sheet (23) is composed of two metal meshes and a non-woven fabric sandwiched between the metal meshes. The inner wall surface of the air cylinder (21) is coated with grease to reduce the friction of the piston head (22), improve the air tightness and the smooth movement of the piston head (22), and the grease partition sheet (23) has a breathable property and can prevent the emulsion grease from flowing into the air channel (24) to cause rapid loss, thereby increasing the effective lubrication time of the grease.

4. A tailstock for a fixed machine tool center according to claim 3, characterized in that: A front top rubber gasket (18) is fixedly provided on the front end surface of the tailstock sleeve (13); when the top point (10) is inserted into place, the step surface of the top point (10) abuts against the front top rubber gasket (18); and as the air cylinder (21) sucks the top point (10), its step surface and the front top rubber gasket (18) are pressed together, thereby effectively ensuring the stability of the top point (10) and avoiding scratches on the outer surface of the top point (10).

5. The tailstock for fixing the center of a machine tool according to claim 4, characterized in that: An adjustment slot (14) is provided on the machine tool tailstock (11) for a locker (15) to extend out of. When the tailstock sleeve (13) moves forward and backward relative to the machine tool tailstock (11), the locker (15) can be adjusted forward and backward without obstacles in the adjustment slot (14).

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