CN205967450U - Main shaft structure with left -hand thread device - Google Patents
Main shaft structure with left -hand thread device Download PDFInfo
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- CN205967450U CN205967450U CN201621001230.0U CN201621001230U CN205967450U CN 205967450 U CN205967450 U CN 205967450U CN 201621001230 U CN201621001230 U CN 201621001230U CN 205967450 U CN205967450 U CN 205967450U
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- hand thread
- main shaft
- seat
- pull bar
- heart axle
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Abstract
The utility model belongs to the technical field of the machine tool technique and specifically relates to that relate to is main shaft structure with left -hand thread device. The utility model discloses main shaft structure with left -hand thread device, when dish -shaped elastic piece between pull rod and mandrel is compressed downwards, the spout of clamping ring and the contact of the bulge loop of left -hand thread seat to transmit the decurrent pressure of mandrel to the main shaft through clamping ring, left -hand thread seat, the decurrent pressure of mandrel is directly shared to messenger's main shaft, avoids manufacturing into the impact to the counter roll, has improved precision, stability and the life of main shaft greatly. Wholly improve simple structure, reasonable, processing is convenient, characteristics such as with low costs. Be equipped with shock -absorbing structure simultaneously between left -hand thread seat and the main shaft, can be in subduing the ascending expansion force of inertia that produces when dish -shaped elastic piece is loose to be released, the emergence is moved when driving pull rod, mandrel, a bearing, main shaft rebound when avoiding the dish -shaped elastic piece pine to release, the dystopy.
Description
Technical field
This utility model is related to machining tool technical field, and especially relate to is the main axle structure with left-hand thread device.
Background technology
Machining center automatic tool changer is a requisite function.As shown in figure 1, in exchanging knives process, under pull bar 5
Move, so that the decrement of dish-shaped shell fragment 4 is increased, its inertial forces also can increase.Under the interaction of power, heart axle 1 is subject to dish
Shell fragment 4 active force downward accordingly, and be transferred to be connected on the bearing 6 between main shaft 2 and heart axle 1, then will be right
Prop up bearing 6 and produce a big axial force of friendship.This power would generally reach more than 10,000 newton, even as high as 18,000 Ns
?.In process, main shaft tool changing is very frequently, and each tool changing, prop up a bearing and will bear so big axial direction
Power, this can form very big impact to a bearing, has a strong impact on the precision of main shaft, stable and service life.
Utility model content
The purpose of this utility model is to overcome above-mentioned deficiency, provides a kind of main axle structure with left-hand thread device.
For achieving the above object, technical solution of the present utility model is：Main axle structure with left-hand thread device, including
The heart axle of tubular and be set in the main shaft of heart axle, left-hand thread seat, oil cylinder from the bottom to top successively, and it is installed on the pull bar in heart axle.
Pull bar lower end is provided with four claws, and four claws are used for clamping cutter.Oil cylinder includes cylinder body above left-hand thread seat, is installed on cylinder body
Cylinder cap above and the piston of ring-type.It is provided with a bearing between main shaft and heart axle；It is provided with dish-shaped shell fragment, just between pull bar and heart axle
Reset in pull bar.The top of heart axle is provided with groove；Pull bar top is installed with pressure seat, and pressure seat is provided with and penetrates the convex of groove
Block, the external diameter of projection is more than the external diameter on heart axle top.It is provided with the splenium above pressure seat, piston is used for driving inside piston
Pressure seat drives pull bar to move up and down.The outer wall of described heart axle is installed with pressure ring, and pressure ring is located at below groove；Outside pressure ring
Wall is provided with annular groove, and left-hand thread seat inwall is provided with the bulge loop being stuck in annular groove.Dish-shaped shell fragment between pull bar and heart axle is compressed downwardly
When, pressure ring is touched with left-hand thread seated connection, and the pressure under heart axial direction is transferred to main shaft through pressure ring, left-hand thread seat, so that main shaft is directly shared
Pressure under heart axial direction, it is to avoid fulcrum is held and impacts, substantially increases the precision of main shaft, stable and service life.
Preferably, the radial thickness of described bulge loop is less than the radial thickness of annular groove, and the internal diameter of bulge loop is more than within annular groove
External diameter, makes pressure ring keep normality not contact with left-hand thread seat, it is to avoid left-hand thread seat contacts frictional heat, the work of impact main shaft with pressure ring
Performance.
Preferably, it is provided with shock-damping structure between described left-hand thread seat and main shaft, shock-damping structure is used for cutting down dish-shaped shell fragment pine oil
When the inertia that produces expansion force upwards, avoid driving pull bar, heart axle, bearing, main shaft during dish-shaped shell fragment pine oil upwards simultaneously
Be moved when mobile, dystopy.
Preferably, described shock-damping structure includes axially penetrating through the pilot hole of left-hand thread seat, the axial screw located at main shaft, installation
In the spring of guiding in the hole be located at sprue above spring, and the screw rod being fixedly installed in screw；Screw rod extends upwardly to
Pilot hole, outer screw diameter is more than spring inside diameter.
Preferably, described pilot hole includes hole and internal diameter is less than the lower opening in upper in the hole footpath；Spring is built in hole, sprue
Block aperture.
Preferably, described inferior part of the cylinder block is provided with radially inner flange, is provided with the footpath mated with cylinder body top outside piston
To inside protuberance, piston combines formation cylinder chamber with cylinder body.
Operation principle：During tool changing operation, oil cylinder is pumped outward, and piston moves down, and encounters pressure seat；Piston driving pressure
Seat and the pull bar being connected with pressure seat are moved down, and four claws move down with pull bar；When under piston on earth, four claws unclamp；Then
Tool changing action is carried out by mechanical hand.Now, the dish-shaped shell fragment between pull bar and heart axle is compressed downwardly, and pressure ring is formed with left-hand thread seat
Left-hand thread device the axially lower pressure of the heart is transferred to main shaft through pressure ring, left-hand thread seat, make main shaft directly share the heart axial under pressure
Power, the pressure under effectively solving traditional structure is central axial is transferred to main shaft through a bearing, leads to fulcrum to bear the problem of damage.
After new cutter is changed to main shaft, oiling in oil cylinder, piston up rollback, pull bar is in dish-shaped shell fragment resilience simultaneously
Up move rollback in the presence of expansion force, and then strain cutter.Now, the part such as main shaft, heart axle, left-hand thread seat is subject to inertia upwards
Mobile, the screw rod being installed on main shaft props up spring, can effectively eliminate inertia power upwards.
By using above-mentioned technical scheme, the beneficial effects of the utility model are：This utility model carries left-hand thread device
Main axle structure, when the dish-shaped shell fragment between pull bar and heart axle is compressed downwardly, the chute of pressure ring is connect with the bulge loop of left-hand thread seat
Touch, and the pressure under heart axial direction is transferred to main shaft through pressure ring, left-hand thread seat, make main shaft directly share the pressure under heart axial direction, keep away
Exempt from fulcrum is held and impact, substantially increase the precision of main shaft, stable and service life.Overall improvement is simple and reasonable for structure,
Easy to process, the features such as low cost.It is provided with shock-damping structure between left-hand thread seat and main shaft simultaneously, can be when abatement dish-shaped shell fragment pine oil
The inertia producing expansion force upwards, it is to avoid when driving pull bar, heart axle, a bearing, main shaft to move up during dish-shaped shell fragment pine oil
Be moved, dystopy.
Brief description
Fig. 1 is traditional tool changing device structure chart；
Fig. 2 is structural representation of the present utility model；
Fig. 3 is this utility model shock-damping structure figure.
Main Reference Numerals explanation：（1st, heart axle；2nd, main shaft；3rd, four claw；4th, dish-shaped shell fragment；5th, pull bar；6th, prop up bearing；
7th, left-hand thread seat；8th, cylinder body；81st, flange；9th, piston；91st, protuberance；10th, cylinder cap；11st, pressure seat；12nd, pressure ring；13rd, spring；14、
Groove；15th, projection；16th, splenium；17th, annular groove；18th, bulge loop；19th, shock-damping structure；20th, pilot hole；21st, screw；22nd, sprue；
23rd, screw rod；24th, upper hole；25th, lower opening）.
Specific embodiment
To further illustrate this utility model below in conjunction with the drawings and specific embodiments.
As shown in Fig. 2-Fig. 3, this utility model carry left-hand thread device main axle structure, the heart axle 1 including tubular and by under
The supreme main shaft 2 being set in heart axle 1 successively, left-hand thread seat 7, oil cylinder, and it is installed on the pull bar 5 in heart axle 1.Pull bar 5 lower end sets
There are four claws 3, four claws 3 are used for clamping cutter.Oil cylinder includes cylinder body 8 positioned at left-hand thread seat 7 top, is installed on above cylinder body 8
Cylinder cap 10 and ring-type piston 9.Described cylinder body 8 bottom is provided with radially inner flange 81, be provided with outside piston 9 with cylinder body on
The radially inner protuberance 91 of portion's coupling, piston 9 combines formation cylinder chamber with cylinder body 8.It is provided with a bearing between main shaft 2 and heart axle 1
6；It is provided with dish-shaped shell fragment 4 between pull bar 5 and heart axle 1, be easy to pull bar 5 and reset.The top of heart axle 1 is provided with groove 14；Pull bar 5 top
It is installed with pressure seat 11, pressure seat 11 is provided with the projection 15 penetrating groove 14, the external diameter of projection 15 is more than heart axle 1 top
External diameter.It is provided with the splenium 16 positioned at pressure seat 11 top, piston 9 is used for driving pressure seat 11 and drives pull bar about 5 inside piston 9
Mobile.The outer wall of described heart axle 1 is installed with pressure ring 12, and pressure ring 12 is located at below groove 14；The outer wall of pressure ring 12 is provided with ring
Groove 17, left-hand thread seat 7 inwall is provided with the bulge loop 18 being stuck in annular groove 17.Dish-shaped shell fragment 4 between pull bar and heart axle is compressed downwardly
When, pressure ring 12 is contacted with left-hand thread seat 7, and pressure downward for heart axle 1 is transferred to main shaft 2 through pressure ring 12, left-hand thread seat 7, makes main shaft 2
Directly share the downward pressure of heart axle 1, it is to avoid a bearing 6 is impacted, substantially increase the precision of main shaft 3, stablize and make
Use the life-span.
And, the radial thickness of described bulge loop 18 is less than the radial thickness of annular groove 17, and the internal diameter of bulge loop 18 is more than annular groove 17
Internal external diameter, makes pressure ring 12 keep normality not contact with left-hand thread seat 7, it is to avoid left-hand thread seat 7 contacts frictional heat, shadow with pressure ring 12
Ring the service behaviour of main shaft 2.
Meanwhile, it is provided with shock-damping structure 19 between left-hand thread seat 7 described in the utility model and main shaft 2, shock-damping structure 19 is used for disappearing
Subtract the inertia producing during dish-shaped shell fragment 6 pine oil expansion force upwards, avoid driving pull bar 5, heart axle simultaneously during dish-shaped shell fragment 6 pine oil
1st, prop up bearing 6, main shaft 2 is moved when moving up, dystopy.Described shock-damping structure 19 includes axially penetrating through leading of left-hand thread seat 7
To hole 20, the axial screw 21 located at main shaft 2, the spring 13 being installed in pilot hole 20 and the sprue being located at spring 13 top
22, and it is fixedly installed in the screw rod 23 of screw 21；Screw rod 23 extends upwardly to pilot hole 20, and screw rod 23 external diameter is more than spring 13
Internal diameter.Described pilot hole 20 includes hole 24 and internal diameter is less than the lower opening 25 of upper hole 24 internal diameter；Spring 13 is built in hole 24, blocks up
Block 22 blocks 24 mouthfuls of hole.
Operation principle：During tool changing operation, oil cylinder is pumped outward, and piston 9 moves down, and encounters pressure seat 11；Piston 9 drives
Pressure seat 11 and the pull bar 5 being connected with pressure seat 11 are moved down, and four claws 3 move down with pull bar 5；When under piston 9 on earth, pintongs
Pawl 3 unclamps；Then tool changing action is carried out by mechanical hand.Now, the dish-shaped shell fragment 4 between pull bar 5 and heart axle 1 is compressed downwardly,
Pressure downward for heart axle 1 is transferred to main shaft 2 through pressure ring 12, left-hand thread seat 7 with the left-hand thread device of left-hand thread seat 7 composition by pressure ring 12, makes
The downward pressure of heart axle 1 directly shared by main shaft 2, and the downward pressure of effectively solving traditional structure central shaft 1 is transferred to through a bearing 6
Main shaft 2, lead to the impaired problem of a bearing 6.
After new cutter is changed to main shaft 2, oiling in oil cylinder, piston 9 up rollback, pull bar 5 is in dish-shaped shell fragment 4 simultaneously
Up move rollback in the presence of resilience expansion force, and then strain cutter.Now, the part such as main shaft 2, heart axle 1, left-hand thread seat 7 is subject to
Inertia moves up, and the screw rod 23 being installed on main shaft 2 props up spring 13, can effectively eliminate inertia power upwards.
Above-described, preferred embodiment only of the present utility model and it is impossible to limit this practicality enforcement scope, all
It is the impartial change and decoration made according to this utility model claim, all should still fall within the scope that this utility model is covered
Interior.
Claims (6)
1. carry the main axle structure of left-hand thread device, the heart axle includings tubular and the main shaft, instead being set in heart axle from the bottom to top successively
Button Block, oil cylinder, and it is installed on the pull bar in heart axle；Pull bar lower end is provided with four claws, and four claws are used for clamping cutter；Oil cylinder bag
Include the cylinder body above left-hand thread seat, be installed on the piston of cylinder cap above cylinder body and ring-type；It is provided between main shaft and heart axle and prop up
Bearing；It is provided with dish-shaped shell fragment between pull bar and heart axle, be easy to pull bar and reset；The top of heart axle is provided with groove；Pull bar top is fixed
Pressure seat is installed, pressure seat is provided with the projection penetrating groove, the external diameter of projection is more than the external diameter on heart axle top；Set inside piston
There is the splenium above pressure seat, piston is used for driving pressure seat and drives pull bar to move up and down；It is characterized in that:Described heart axle
Outer wall be installed with pressure ring, pressure ring be located at groove below；The outer wall of pressure ring is provided with annular groove, and left-hand thread seat inwall is provided with and is stuck in ring
Bulge loop in groove.
2. the main axle structure with left-hand thread device according to claim 1 it is characterised in that：The radial thickness of described bulge loop
Less than the radial thickness of annular groove, the internal diameter of bulge loop is more than the external diameter within annular groove, makes pressure ring keep normality not contact with left-hand thread seat.
3. the main axle structure with left-hand thread device according to claim 1 it is characterised in that：Described left-hand thread seat and main shaft it
Between be provided with shock-damping structure, shock-damping structure be used for cut down the inertia producing during dish-shaped shell fragment pine oil expansion force upwards, avoid simultaneously
Drive pull bar, heart axle, bearing, main shaft to be moved when moving up during dish-shaped shell fragment pine oil, dystopy.
4. the main axle structure with left-hand thread device according to claim 3 it is characterised in that：Described shock-damping structure includes axle
To running through the pilot hole of left-hand thread seat, the axial screw located at main shaft, it is installed on the spring of guiding in the hole and is located above spring
Sprue, and it is fixedly installed in the screw rod of screw；Screw rod extends upwardly to pilot hole, and outer screw diameter is more than spring inside diameter.
5. the main axle structure with left-hand thread device according to claim 4 it is characterised in that：Described pilot hole includes hole
It is less than the lower opening in upper in the hole footpath with internal diameter；Spring is built in hole, and aperture blocked by sprue.
6. the main axle structure with left-hand thread device according to claim 1 it is characterised in that：Described inferior part of the cylinder block is provided with footpath
To inside flange, outside piston, it is provided with the radially inner protuberance mating with cylinder body top, piston combines formation cylinder with cylinder body
Chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621001230.0U CN205967450U (en) | 2016-08-31 | 2016-08-31 | Main shaft structure with left -hand thread device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621001230.0U CN205967450U (en) | 2016-08-31 | 2016-08-31 | Main shaft structure with left -hand thread device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205967450U true CN205967450U (en) | 2017-02-22 |
Family
ID=58038611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621001230.0U Active CN205967450U (en) | 2016-08-31 | 2016-08-31 | Main shaft structure with left -hand thread device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205967450U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111151770A (en) * | 2019-12-30 | 2020-05-15 | 广州市昊志机电股份有限公司 | Main shaft |
-
2016
- 2016-08-31 CN CN201621001230.0U patent/CN205967450U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111151770A (en) * | 2019-12-30 | 2020-05-15 | 广州市昊志机电股份有限公司 | Main shaft |
| CN111151770B (en) * | 2019-12-30 | 2022-03-08 | 广州市昊志机电股份有限公司 | Main shaft |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |