CN216028125U - Disc tailstock of numerical control machine tool - Google Patents
Disc tailstock of numerical control machine tool Download PDFInfo
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- CN216028125U CN216028125U CN202121983932.4U CN202121983932U CN216028125U CN 216028125 U CN216028125 U CN 216028125U CN 202121983932 U CN202121983932 U CN 202121983932U CN 216028125 U CN216028125 U CN 216028125U
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Abstract
The utility model belongs to the technical field of numerical control machines, and particularly discloses a disc tailstock of a numerical control machine, which comprises a tailstock body, wherein the tailstock body is rotatably connected with a mandrel, one end of the mandrel is fixedly connected with a turntable, a connecting disc is sleeved on the mandrel, a plurality of mounting grooves are formed in the tailstock body, a cylinder is mounted in each mounting groove, a moving hole for a piston rod of the cylinder to pass through is formed in the tailstock body, a brake hole corresponding to the moving hole is formed in the connecting disc, two air flow through holes are formed in the side wall of a cavity on the side, where the piston rod does not pass through, of the cylinder, the two air flow through holes are formed in the side wall of the cavity, are respectively connected with the same air bag through air pipelines, through holes for the air pipelines to pass through are formed in the tailstock body, and one-way valves and switch valves are arranged on the two air pipelines. The pressure difference between the two sides of the air cylinder is convenient to adjust, so that the piston rod can extend into the brake hole to realize braking or the piston rod can withdraw from the brake hole.
Description
Technical Field
The utility model belongs to the technical field of numerical control machines, and particularly relates to a disc tailstock of a numerical control machine.
Background
The tailstock is used on a machine tool and matched with a clamp of the machine tool to clamp a tool and realize rotation of a workpiece, and the tailstock can move relative to a guide rail on the machine tool to adjust the position so as to be suitable for workpieces with different lengths.
The connection disc tailstock belongs to one of tailstocks, and comprises a mandrel and a table top positioned at the front end of the mandrel, and generally is provided with a brake system. The application number is CN 200920119595.7's chinese utility model patent discloses a tailstock of digit control machine tool, the power distribution box comprises a box body, carousel and pivot, the carousel links firmly in the one end of pivot and rotates along with the pivot, one side that the carousel is close to the box has the boss, there is an annular brake ring that can produce elastic deformation under the pressure effect at this boss overcoat, the brake ring links firmly in the box, cooperation clearance has between brake ring and the boss, be equipped with between brake ring and the box and make the brake ring internal diameter reduce the hydraulic pressure mechanism with the boss fastening through hydraulic pressure. Reduce the internal diameter through the brake ring that links firmly with the box in this patent and embrace the boss and realize the brake under hydraulic effect, but the brake ring can deform when reducing the internal diameter and be oval, brake ring and boss contact are the point contact promptly, because the friction surface less can appear the not enough condition of frictional resistance, cam and carousel still pivoted condition behind can not in time stop or brake when frictional force is less, long-time friction between brake ring and the cam in addition, can cause the condition of brake ring transition wearing and tearing, can influence braking system's normal work behind the brake ring wearing and tearing.
There is currently no solution to the shortcomings of the prior art.
SUMMERY OF THE UTILITY MODEL
Aiming at the technical problems in the related art, the utility model provides a disk tailstock of a numerical control machine tool, which can overcome the defects in the prior art.
In order to achieve the technical purpose, the technical scheme of the utility model is realized as follows:
a disk tailstock of a numerical control machine tool comprises a tailstock body, wherein the tailstock body is rotatably connected with a mandrel, one end of the mandrel is fixedly connected with a rotary table, a connecting disc is sleeved on the mandrel, a plurality of mounting grooves are formed in the tailstock body, a cylinder is mounted in each mounting groove, a moving hole for a piston rod of each cylinder to pass through is formed in the tailstock body, a brake hole corresponding to the moving hole is formed in the connecting disc, two air flow through holes are formed in the side wall of each cylinder, the two air flow through holes are formed in the side wall of a cavity on the side, where the piston rod does not pass through, of each cylinder, the two air flow through holes are respectively connected with the same air bag through air pipelines, through holes for the air pipelines to pass through are formed in the tailstock body, one check valve and a switch valve are arranged on the two air pipelines, and one check valve is used for supplying air to flow into the cavity on the side, where the piston rod does not pass through, of each cylinder from the air bag, the other one-way valve supplies air flow to the air bag from the cavity on the side of the air cylinder without the piston rod passing through.
Further: the tailstock body comprises a first body and a second body, the first body is rotatably connected with the connecting disc, and the second body is fixedly connected with the first body; the first body and the second body are provided with half mounting grooves and half moving holes, the air cylinder is mounted in the mounting grooves formed by the half mounting grooves, and the half moving holes are formed for the piston rod to penetrate. The mounting of the cylinder can be facilitated.
Further: the connecting plate is provided with sliding grooves corresponding to two sides of each braking hole, each sliding groove is internally and slidably connected with a sliding cover, a spring is connected between each sliding cover and the connecting plate, and the spring is connected to one side, far away from the braking hole, of each sliding cover. The arrangement of the spring and the sliding cover ensures that the piston rod can move to push the sliding cover open only when the pressure difference in the cylinder reaches a certain value, thereby avoiding the situation that the piston rod moves to be clamped in the brake hole to cause brake due to expansion with heat and contraction with cold or other external condition changes.
Further: grooves are formed in the sides, close to each other, of the two sliding covers, and the front end of a piston rod of the air cylinder is connected with a connecting block corresponding to the grooves. The groove is matched with the connecting block, so that the piston rod can push the sliding cover open.
Further: the mandrel is rotatably connected with the second body through two bearings, a positioning block is connected to the second body, and the positioning block is located between the two bearings. The positioning and the installation of the two bearings can be facilitated.
Further: an oil filling hole is formed in the second body, a lubricating oil circulation hole is formed in the positioning block, and the oil filling hole is communicated with the lubricating oil circulation hole. The bearing can be conveniently lubricated, and the motion precision of the mandrel is improved.
The utility model discloses a disk tailstock of a numerical control machine tool, which has the following beneficial effects: the pressure difference between the two sides of the air cylinder is convenient to adjust, so that the piston rod can extend into the brake hole to realize braking or the piston rod can withdraw from the brake hole.
Drawings
Fig. 1 is a cross-sectional view of a disk tailstock of a numerical control machine tool according to the present invention;
FIG. 2 is an enlarged view of a portion of the present invention at A;
FIG. 3 is an enlarged view of a portion of the utility model at B;
in the figure: the device comprises a mandrel 1, a turntable 2, a connecting disc 3, a brake hole 31, a tailstock body 4, a first body 41, a second body 42, a moving hole 43, an oil filling hole 421, a positioning nut 5, a bearing 6, a positioning block 7, a lubricating oil circulation hole 71, a cylinder 8, a gas pipeline 9, a switch valve 10, an air bag 11, a connecting block 12, a sliding cover 13 and a spring 14.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
A disk tailstock of a numerical control machine tool, as shown in fig. 1-2, comprises a tailstock body 4, wherein a through hole is formed in the middle of the tailstock body 4, a mandrel 1 is arranged in the through hole, the tailstock body 4 and the mandrel 1 are rotatably connected through two bearings 6, a turntable 2 is fixedly connected with one end of the mandrel 1, a connecting disc 3 is sleeved on the mandrel 1, and the connecting disc 3 and the turntable 2 are fixedly connected, so that the connecting disc 3, the turntable 2 and the mandrel 1 can synchronously rotate; the mounting grooves comprise a plurality of mounting grooves, the mounting grooves are formed in the tailstock body 4, a cylinder 8 is mounted in each mounting groove, in addition, the tailstock body 4 is further provided with moving holes 43 with the number equal to that of the mounting grooves, the moving holes 43 are communicated with the mounting grooves, the moving holes 43 are used for moving piston rods of the cylinders 8, the connecting disc 3 is provided with brake holes 31 corresponding to the moving holes 43, and the sizes of the brake holes 31 and the sizes of the piston rods are matched with each other, so that the piston rods of the cylinders 8 can extend into the brake holes 31, and braking is realized; the cylinder 8 is divided into two cavities by a piston in the cylinder 8, the piston rod passes through one of the two cavities, two air flow through holes are formed in the side wall of the cylinder 8 corresponding to the other cavity without the piston rod, the two air flow through holes are respectively connected with the same air bag 11 through air pipelines 9, the cylinder 8 is arranged in a mounting groove of the tailstock body 4, a through hole for the air pipeline 9 to pass through is formed in the tailstock body 4 and is communicated with the mounting groove, one-way valve and a switch valve 10 are arranged on the two air pipelines 9, one of the one-way valves (the back is represented by the one-way valve A, and the switch valve 10 on the air pipeline 9 where the one-way valve A is located is represented by the switch valve A) is used for supplying air flow into the cavity on the side where the piston rod does not pass through of the cylinder 8 from the air bag 11, and when the switch valve A on the air pipeline 9 where the one-way valve A is located is opened, the air in the air bag 11 flows into the cavity on the side where the piston rod does not pass through the cylinder 8 through the one-way valve A and the switch valve A In the cavity, the air pressure in the cavity on the side is increased, so that the air in the cavity can push the piston rod of the air cylinder 8 to move towards the direction of increasing the volume of the cavity on the side, so that the length of the piston rod extending out of the cavity on the other side is gradually increased, when the brake hole 31 rotates to be aligned with the piston rod, the piston rod extends into the brake hole 31, so that braking can be realized, the other one-way valve (the back is represented by the one-way valve B, the switch valve 10 on the air pipeline 9 where the one-way valve B is located is the switch valve B) supplies air flow to flow into the air bag 11 from the cavity on the side of the air cylinder 8 where the piston rod does not pass through, when the switch valve B is opened and the switch valve A is closed, the air flow in the cavity on the side of the air cylinder 8 where the piston rod does not pass through flows into the air bag 11 through the one-way valve B, so that the air pressure in the cavity on the side of the air cylinder 8 where the piston rod does not pass through is reduced, and the piston moves towards the side where the piston rod does not pass through, thereby driving the piston rod to withdraw from the braking hole 31, and realizing the rotation of the connecting disc 3, the turntable 2 and the mandrel 1 relative to the tailstock body 4.
In one embodiment of the utility model: the tailstock body 4 comprises a first body 41 and a second body 42, the first body 41 is rotatably connected with the connecting disc 3, and the second body 42 is fixedly connected with the first body 41; the first body 41 and the second body 42 are provided with half mounting grooves and half moving holes, the cylinder 8 is mounted in the mounting grooves formed by the half mounting grooves, and the half moving holes 43 for the piston rod to pass through are formed by the half moving holes. Divide into body one 41 and body two 42 with tailstock body 4 to can make things convenient for the installation of cylinder 8, can conveniently unpack body one 41 and body two 42 apart when cylinder 8 breaks down in addition, realize the maintenance to cylinder 8.
In one embodiment of the utility model: as shown in fig. 2, sliding grooves are formed in the connecting disc 3 corresponding to two sides of each braking hole 31, a sliding cover 13 is connected in each sliding groove, a spring 14 is connected between the sliding cover 13 and the connecting disc 3, wherein one end of the spring 14 is connected with one side, far away from the braking hole 31, of the sliding cover 13, and the other end of the spring 14 is connected with the connecting disc 3, when the two sliding covers 13 corresponding to each braking hole 31 just cover the braking hole 31, the spring 14 is in a compressed state, so that the sliding cover 13 can be pushed open only under the action of a large thrust force by a piston rod of the air cylinder 8, and the situation that the piston rod moves to be clamped in the braking hole 31 to cause error braking due to thermal expansion and cold contraction or other external condition changes is avoided; grooves are formed in the side, close to each other, of each of the two sliding covers 13, the front end of a piston rod of the air cylinder 8 is connected with a connecting block 12, and the connecting block 12 corresponds to the grooves. The groove and the connecting block 12 are matched to facilitate the piston rod to push the sliding cover 13 open.
In one embodiment of the utility model: as shown in fig. 3, the spindle 1 is rotatably connected with the second body 42 through two bearings 6, a positioning block 7 is connected to the second body 42, the positioning block 7 is located between the two bearings 6, one of the bearings 6 is positioned through the connecting disc 3 and the positioning block 7, a positioning nut 5 is sleeved on the spindle 1 between the other bearing 6 and the second body 42, and the bearing 6 is positioned through the positioning nut 5 and the positioning block 7. In addition, an oil filling hole 421 is formed in the second body 42, a lubricating oil circulation hole 71 is formed in the positioning block 7, the oil filling hole 421 is communicated with the lubricating oil circulation hole 71, when the two bearings 6 need to be lubricated in a clearance mode, lubricating oil can be added into the second body 42 through the oil filling hole 421, and flows into the lubricating oil circulation hole 71 along the oil filling hole 421 and flows to the two bearings 6 through the lubricating oil circulation hole 71 respectively.
In order to facilitate understanding of the above-described aspects of the present invention, the above-described aspects of the present invention will be described in detail below.
When the brake is needed, the switch valve 10A is opened, the air in the air bag 11 flows into the cavity on the side of the cylinder 8 without the piston rod, the pressure in the side cavity is increased, so that the piston and the piston rod move towards the direction of increasing the volume of the side, the length of the piston rod extending out of the cylinder 8 is increased, when the brake hole 31 on the connecting disc 3 rotates to be aligned with the piston rod, the piston rod pushes the sliding cover 13 to open under the action of air pressure, the piston rod enters the brake hole 31 to realize braking, when the brake is not needed, the switch valve A is closed, the switch valve B is opened, the air in the cavity on the side of the cylinder 8 without the piston rod flows into the air bag 11, the air pressure at the side is reduced, the piston rod and the piston rod move towards the side, the piston rod moves out of the brake hole 31, and the sliding cover 13 covers the corresponding brake hole 31 again under the elastic force of the spring 14, so that the advantage of convenient braking can be realized.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the embodiments, and various equivalent changes can be made to the technical solution of the present invention within the technical idea of the present invention, and these equivalent changes are within the protection scope of the present invention.
Claims (6)
1. A disk tailstock of a numerical control machine tool comprises a tailstock body, wherein the tailstock body is rotatably connected with a mandrel, one end of the mandrel is fixedly connected with a rotary table, the disk tailstock is sleeved on the mandrel, a plurality of mounting grooves are formed in the tailstock body, a cylinder is mounted in each mounting groove, a moving hole for a piston rod of the cylinder to penetrate through is formed in the tailstock body, a brake hole corresponding to the moving hole is formed in the connecting plate, two air flow through holes are formed in the side wall of the cylinder, the two air flow through holes are formed in the side wall of a cavity on the side, where the piston rod does not penetrate through, of the cylinder, the two air flow through holes are respectively connected with the same air bag through air pipelines, through holes for the air pipelines to penetrate through are formed in the tailstock body, and one-way valves and switch valves are arranged on the two air pipelines, one check valve supplies air flow to flow into the cavity on the side of the cylinder through which the piston rod does not penetrate from the air bag, and the other check valve supplies air flow to flow into the air bag from the cavity on the side of the cylinder through which the piston rod does not penetrate.
2. The disc tailstock of a numerical control machine tool according to claim 1, characterized in that: the tailstock body comprises a first body and a second body, the first body is rotatably connected with the connecting disc, and the second body is fixedly connected with the first body; the first body and the second body are provided with half mounting grooves and half moving holes, the air cylinder is mounted in the mounting grooves formed by the half mounting grooves, and the half moving holes are formed for the piston rod to penetrate.
3. The disc tailstock of a numerical control machine tool according to claim 2, characterized in that: the connecting plate is provided with sliding grooves corresponding to two sides of each braking hole, each sliding groove is internally and slidably connected with a sliding cover, a spring is connected between each sliding cover and the connecting plate, and the spring is connected to one side, far away from the braking hole, of each sliding cover.
4. The disc tailstock of a numerical control machine tool according to claim 3, characterized in that: grooves are formed in the sides, close to each other, of the two sliding covers, and the front end of a piston rod of the air cylinder is connected with a connecting block corresponding to the grooves.
5. The disc tailstock of a numerical control machine tool according to claim 4, characterized in that: the mandrel is rotatably connected with the second body through two bearings, a positioning block is connected to the second body, and the positioning block is located between the two bearings.
6. The disc tailstock of a numerical control machine tool according to claim 5, characterized in that: an oil filling hole is formed in the second body, a lubricating oil circulation hole is formed in the positioning block, and the oil filling hole is communicated with the lubricating oil circulation hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121983932.4U CN216028125U (en) | 2021-08-23 | 2021-08-23 | Disc tailstock of numerical control machine tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121983932.4U CN216028125U (en) | 2021-08-23 | 2021-08-23 | Disc tailstock of numerical control machine tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216028125U true CN216028125U (en) | 2022-03-15 |
Family
ID=80620844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121983932.4U Active CN216028125U (en) | 2021-08-23 | 2021-08-23 | Disc tailstock of numerical control machine tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216028125U (en) |
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2021
- 2021-08-23 CN CN202121983932.4U patent/CN216028125U/en active Active
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