CN201151064Y - Self locking mechanism for preventing Z-shaft of vertical numerically controlled machine form self-falling - Google Patents
Self locking mechanism for preventing Z-shaft of vertical numerically controlled machine form self-falling Download PDFInfo
- Publication number
- CN201151064Y CN201151064Y CNU2008200586751U CN200820058675U CN201151064Y CN 201151064 Y CN201151064 Y CN 201151064Y CN U2008200586751 U CNU2008200586751 U CN U2008200586751U CN 200820058675 U CN200820058675 U CN 200820058675U CN 201151064 Y CN201151064 Y CN 201151064Y
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- self
- zigzag
- nut
- locking mechanism
- numerically controlled
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Abstract
The utility model relates to a self-locking mechanism capable of resisting the self-dropping of a Z shaft of a vertical numerical control machine, which comprises a ball guide screw which is connected with a servo motor and is vertically installed, and a screw nut which is screwed with the ball guide screw, and the screw nut is connected with a vertical moving part, which forms a Z shaft mechanism. The self-locking mechanism is characterized in that a sawtooth rotational screw nut which is axially positioned and is vertically installed is screwed with a sawtooth screw rod, the ball guide screw drive the sawtooth rotational screw nut through a synchronizing drive mechanism, a rectangular compression spring is sleeved on the upper portion of the sawtooth screw rod, the lower end of the rectangular compression spring is supported by a convex shoulder of the sawtooth screw rod, and the upper end supports the vertical moving part. The utility model has the advantages of simple structure, good reliability and low cost.
Description
Technical field
The utility model relates to a kind of self-locking mechanism, and particularly vertical type numerically controlled machine Z axle (vertical rotation axis) is anti-from the self-locking mechanism that falls.
Background technology
The Z spindle unit of vertical type numerically controlled machine is typically designed to one with the parts that move both vertically, and adopt the ball screw transmission mostly, and ball screw does not have self-locking substantially, and when the control system dead electricity, moving component can glide because of gravity, and this does not allow.Existing self-locking mechanism has gravity counterweight, hydraulic means and brake locking.
(1) weight counterweight
Its principle of weight counterweight is fairly simple, and the balance weight that is equipped with equivalent weight by the weight of moving component gets final product.Weight counterweight simple in structure, reliable operation.But the weight counterweight need take bigger installing space, and its balance weight also can increase the lathe overall weight.In addition, be non-being rigidly connected owing to what adopt between moving component and the counterweight, when moving component moved downward, movement inertia equaled moving component inertia and counterweight inertia sum; When moving upward, total movement inertia only is a moving component inertia, and acceleration of motion must be less than the balancing weight free-fall acceleration, and this is restricted the speed of moving component and acceleration.In the Digit Control Machine Tool of high-precision high-speed, be not suitable for selecting for use the weight counterweight.
(2) liquid air pressure balance
The method of hydro-cushion is exactly the hydraulic coupling F who equates with it of rightabout increase at parts gravity G, offsets the effect of this gravity.The operation principle basically identical of air pressure balance and hydro-cushion, difference is the medium difference of the power that produces.Hydro-cushion method in theory, as long as each components and parts is selected suitably, the speed of its moving component, acceleration can both reach bigger value.But,, tend to occur problems such as hydraulic shock, driving overload when speed, the acceleration of moving component are bigger.The air pressure balance method can make moving component reach desirable speed and acceleration, but the volume of air pressure balance mechanism is bigger, increase the volume of complete machine, and noise also is the problem that can not be ignored.
(3) brake locking
Brake locking utilizes the gravity of frictional force balance exercise parts.When moving component was worked, retaining mechanism was inoperative, had only moving component to be in when stopping, and the frictional force of retaining mechanism just plays balanced action.The method high-speed machining center abroad is applied.The method disadvantage is that the response time of brake must have very high sensitivity, otherwise can produces bigger influence to the positioning accuracy of moving-member.Emergency braking mechanism must be installed simultaneously deal with in the process accidents such as unexpected outage.
The utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of vertical type numerically controlled machine Z axle anti-from the self-locking mechanism that falls, simple in structure, good reliability, and cost is low.
For achieving the above object, design of the present utility model is: servomotor directly drives ball screw, utilizes the feed screw nut to pay the transmission kinematic accuracy, guarantees the perpendicular positioning precision.Synchronizing wheel on the ball screw guarantees that by the zigzag of band driving synchronously rotating nut ball screw has identical rotating speed with the zigzag rotating nut simultaneously.Because of having identical pitch, so can guarantee to move with speed with the zigzag screw rod.During ball screw work, the zigzag screw rod only is in the servo-actuated state and ball screw is synchronous immediately; When Z axle servomotor was not worked, the zigzag screw rod utilized its auto-lock function, and the platform that prevents to move both vertically glides because of gravity.This mechanism can satisfy the digital control vertical lathe parts that move both vertically fully and under the static or off-mode, prevent the function that glides in ascending motion.Servomotor drives ball screw and zigzag screw rod simultaneously by synchronizing wheel, can guarantee the synchronism of both displacements substantially.But ball screw positioning accuracy ± 0.005/300mm, repetitive positioning accuracy ± 0.001/300mm, the zigzag screw rod does not obviously reach so precision, and the cumulative errors of both Synchronous Transmission can cause both that faint offset deviation is arranged.Be not allow this situation to exist in high precision machine tool,, solve the cumulative errors of mechanism so must consider to disappear crack and vibration damping.This mechanism adopts the spring crack vibration damping that disappears, and can address this problem effectively.
A kind of vertical type numerically controlled machine Z axle is anti-from the self-locking mechanism that falls, comprising that a vertically arranged ball screw of connection servomotor and a nut revolve joins, this nut is connected with the parts that move both vertically, constitute the Z axis mechanism, it is characterized in that having a vertically arranged zigzag rotating nut of axial location and a zigzag screw rod to revolve joins, described ball screw is by the described zigzag rotating nut of synchronous drive mechanism transmission, a rectangle compression spring sleeve is contained in described zigzag screw rod top, and the described parts that move both vertically are supported in the upper end by the convex shoulder supporting of zigzag screw rod in this rectangle stage clip lower end.
Above-mentioned zigzag rotating nut stays in its axial lock on the lathe by two thrust bearings and the supporting of angular contact ball bearing and by a locking nut and locatees.
Above-mentioned synchronous drive mechanism is: two synchronizing wheels are fixedly mounted on respectively on described ball screw and the zigzag rotating nut, connect transmission by being with synchronously between described two synchronizing wheels.
Above-mentioned ball screw is fixedly mounted on the lathe bed by two angular contact ball bearing supportings.
One end of the above-mentioned parts that move both vertically is connected with described fixed by nut, and the other end slides supporting by a fairlead and described zigzag screw rod.
The utility model is compared with prior art, and is simple in structure, good reliability, and cost is low.
Description of drawings
Fig. 1 is the structural representation of an embodiment of the utility model.
The specific embodiment
A preferred embodiment of the present utility model is: referring to Fig. 1, this vertical type numerically controlled machine Z axle is anti-to include servomotor 1 and synchronizing wheel 16 from the self-locking mechanism that falls, servomotor 1 connects ball screw 6, with two angular contact ball bearings 5 ball screw 6 is fixed on the lathe bed 4.Ball screw 6 revolves with nut 7 joins, and nut 7 is fixed on the parts 8 that move both vertically.Active synchronization wheel 3 is installed on the ball screw 6, and active synchronization wheel 3 is with 2 to couple together with driven synchronizing wheel 16 usefulness synchronously.Driven synchronizing wheel 16 is installed on the zigzag rotating nut 12, with two thrust bearings 13, an angular contact ball bearing 14 and a locking nut 15 zigzag rotating nut 12 is fixed on the lathe bed 4, rectangle stage clip 10 1 end bearings are on the convex shoulder of zigzag screw rod 11, and the other end supports the parts 8 that move both vertically.Parts 8 one ends that move both vertically are fixedlyed connected with nut 7, and the other end slides supporting by fairlead 9 and zigzag screw rod 11.
Claims (5)
1. a vertical type numerically controlled machine Z axle is anti-from the self-locking mechanism that falls, comprising that the vertically arranged ball screw of a connection servomotor (1) (6) and a nut (7) revolve joins, this nut (7) is connected with the parts that move both vertically (8), constitute the Z axis mechanism, it is characterized in that having a vertically arranged zigzag rotating nut of axial location (12) and a zigzag screw rod (11) to revolve joins, described ball screw (6) is by the described zigzag rotating nut of synchronous drive mechanism transmission (12), a rectangle stage clip (10) is sleeved on described zigzag screw rod (11) top, and the described parts that move both vertically (8) are supported in the upper end by the convex shoulder supporting of zigzag screw rod (11) in this rectangle stage clip (10) lower end.
2. vertical type numerically controlled machine Z axle according to claim 1 is anti-from the self-locking mechanism that falls, and it is characterized in that described zigzag rotating nut (12) is by two thrust bearings (13) and an angular contact ball bearing (14) supporting and by a locking nut its axial lock is stayed in lathe (4) and go up and locate.
3. vertical type numerically controlled machine Z axle according to claim 1 is anti-from the self-locking mechanism that falls, it is characterized in that described synchronous drive mechanism is: two synchronizing wheels (3,16) are fixedly mounted on respectively on described ball screw (6) and the zigzag rotating nut (12), connect transmission by synchronous band (2) between described two synchronizing wheels (3,16).
4. vertical type numerically controlled machine Z axle according to claim 1 is anti-from the self-locking mechanism that falls, and it is characterized in that described ball screw (6) is fixedly mounted on the lathe bed (4) by two angular contact ball bearings (5) supporting.
5. vertical type numerically controlled machine Z axle according to claim 1 is anti-from the self-locking mechanism that falls, an end that it is characterized in that the described parts that move both vertically (8) is connected with described (7) fixed by nut, and the other end slides supporting by a fairlead (9) and described zigzag screw rod (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200586751U CN201151064Y (en) | 2008-05-20 | 2008-05-20 | Self locking mechanism for preventing Z-shaft of vertical numerically controlled machine form self-falling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200586751U CN201151064Y (en) | 2008-05-20 | 2008-05-20 | Self locking mechanism for preventing Z-shaft of vertical numerically controlled machine form self-falling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201151064Y true CN201151064Y (en) | 2008-11-19 |
Family
ID=40126748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200586751U Expired - Fee Related CN201151064Y (en) | 2008-05-20 | 2008-05-20 | Self locking mechanism for preventing Z-shaft of vertical numerically controlled machine form self-falling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201151064Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111520449A (en) * | 2020-05-06 | 2020-08-11 | 昆山宇源机电有限公司 | Be applied to gravity axle anti-falling device that mechanical equipment reformed transform |
| CN113199283A (en) * | 2021-06-04 | 2021-08-03 | 江苏函杰机床有限公司 | Active protection device of numerical control machine tool |
-
2008
- 2008-05-20 CN CNU2008200586751U patent/CN201151064Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111520449A (en) * | 2020-05-06 | 2020-08-11 | 昆山宇源机电有限公司 | Be applied to gravity axle anti-falling device that mechanical equipment reformed transform |
| CN113199283A (en) * | 2021-06-04 | 2021-08-03 | 江苏函杰机床有限公司 | Active protection device of numerical control machine tool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081119 |