CN1585240A - Braking system for linear actuating device - Google Patents
Braking system for linear actuating device Download PDFInfo
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- CN1585240A CN1585240A CN 03155122 CN03155122A CN1585240A CN 1585240 A CN1585240 A CN 1585240A CN 03155122 CN03155122 CN 03155122 CN 03155122 A CN03155122 A CN 03155122A CN 1585240 A CN1585240 A CN 1585240A
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- guide rail
- slide block
- slider
- braking system
- actuating device
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Abstract
A braking system of linear actuator consists of a pair of rails, a plafform, which includes a pair of sliders, a linear motor to drive the platform moving along the rails, a brake assembled with a slider that has a movable block supported by the slider to move to or from the rails, so that the slider can be used as guide or as brake in two ways.
Description
Technical field
The present invention relates to a kind of braking system that is used for linear actuating device, described linear actuating device comprises workbench, guide rail and motor.
Background of invention
Linear actuating device is widely used in the various industrial circles, such as with the removable workbench form in lathe and the conveyer.This actuating device generally provides power by electro-motor, and some the time have a braking system, even so that having a power failure or other can cause also can being controlled the action of balladeur train or workbench under the situation that electro-motor shuts down.In case detect abnormal conditions, this braking system generally can make the stop motion immediately of balladeur train or workbench, and is not to allow balladeur train or workbench to continue to move under its effect of inertia, and a kind of safety device of simplification is provided thus.
But, known that conventional braking system has a lot of problems.When needs high load capability and high reliability, their weight and volume can make us being difficult to accepting.Limited durability also is a problem.
Japan publication bulletin JP10-112971A discloses a kind of braking system, comprise a brake pad and a calutron, brake pad is being engaged under the partial pressure of spring on the friction member that is connected on the guide rail, and calutron makes brake pad be kept away from friction member when energising usually.Under situation about having a power failure, brake pad is engaged on the friction member.When electric energy recover to be supplied with, the biasing force that cylinder unit overcomes spring made brake pad away from friction member.
Japan discloses a kind of similar braking system among the publication bulletin JP2000-184686A, and this braking system provides power by spring, and utilizes a calutron to keep breaking away from cooperation.
In these braking system, brake pad laterally moves from guide rail, and its braking force can apply a moment in such a way on workbench or balladeur train, and promptly this braking system can be tending towards standing a complicated outside force effect.This just requires described braking system by fully reinforcement, and this can cause manufacturing cost and structural complexity to increase.Also have, described braking system can trend towards bigger than desirable.In addition, the moment that will act on the described braking system can cause the gap between brake pad and the friction member to change, and this can hinder braking system and stably carry out work.
The another one problem of these conventional brake systems is, do not have a kind of configuration to be used to amplify the power that is produced by calutron, and this will cause relatively large calutron of power of needs, and its size will inevitably be very big.Obviously, do not wish as using a cylinder in the invention disclosed in JP10-112971A.
Summary of the invention
In view of described problem of the prior art, main purpose of the present invention is to provide a kind of braking system that is used for linear actuating device, even when deceleration loading is very high, it also can play consistently braking action.
Second purpose of the present invention is to provide a kind of braking system that is used for linear actuating device, and it is safe and reliable in the use, and is compact dimensionally small and exquisite.
The 3rd purpose of the present invention is to provide a kind of braking system that is used for linear actuating device, and it is structurally comparatively simple, and manufacturing cost is lower.
According to the present invention, by a kind of like this braking system that is used for linear actuating device is provided, can realize most of described purpose and other purpose at least, this braking system comprises: a guide rail; A workbench, this workbench includes a slider, this slider is guided by guide rail, be used for moving along the length direction of guide rail, this slider comprises a movable sliding block, this slide block is suitable for sliding along the surface of guide rail, and is provided support by slider, so as towards with deviate from described guide rail surface and move; A linear motor is used to drive workbench and moves along guide rail; And an electric actuator (poweractuator), be used for optionally making that removable slide block moves towards described guide rail surface; Under first state of electric actuator, movable sliding block slides on described guide rail surface, has been used for guide function, and under second state of electric actuator, is carried on the described guide rail surface, has been used for braking action.
Therefore, slider is used for dual purpose, promptly workbench is guided and the motion of workbench is braked along moving of guide rail.Especially because braking force results from the guide rail, so the moment that acts on the workbench owing to braking action can reduce, thereby even feasible when deceleration loading is very high, also can guarantee a stable braking action.This will help to improve reliability, make compact to design, designs simplification and lower manufacturing cost.
According to a preferred embodiment of the present invention, guide rail comprises a pair of guide rail component that is parallel to each other, and workbench comprises a pair of slider of laterally arranging with corresponded manner.Also have, each guide rail component all has a upper surface and a pair of side surface, each side surface all forms an acute angle with respect to upper surface, and have a lower surface that is engaged on the described upper surface one of in the slider, when removable slide block is engaged on the side surface, one fixedly slide block be engaged on the opposite side surface.Come as for another slider, it has a lower surface that is engaged on the described upper surface, and a pair of fixedly slide block is engaged on the respective side surface of guide rail.
A brake unit can all be set, to obtain the braking action of horizontal equilibrium in each side of workbench.But,, also can realize balanced braking action even only a brake unit is set in a side of workbench.For this reason, slider can be processed in such a way, promptly when electric actuator is in second state, in removable slide block in a certain slider and another slider one fixedly slide block be carried on the respective side surface of guide rail, wherein said fixedly slide block is symmetrical arranged with respect to removable slide block.For example, when removable slide block was placed in the outside of one of slider, described slider can be shaped such that outside slide block and the described removable slide block in another slider is carried on the respective side surface of guide rail.
A bearing carrier can be set between slide block and guide rail surface, help guide function and braking action.This bearing carrier preferably has 0.15 to 0.25 static friction coefficient with respect to counter surface.This bearing carrier can be a kind of porous carbonaceous material, and this porous carbonaceous material carries out sintering by the mixture to plant base carbon and phenolic resins and is prepared from.
The accompanying drawing summary
Present invention is described below with reference to accompanying drawings, wherein:
Fig. 1 is the forward view of a linear actuating device, is combined with one in this linear actuating device and implements braking system of the present invention;
Fig. 2 is the partial side view of linear actuating device shown in Fig. 1;
Fig. 3 is the cutaway view of III-III in Fig. 2, and this moment, braking system was in mated condition;
Fig. 4 a is the cutaway view of IV-IV in Fig. 2, and this moment, braking system was in mated condition;
Fig. 4 b is the cutaway view of IV-IV in Fig. 2, and this moment, braking system was in the disengaging mated condition;
Fig. 5 is a view that is similar to Fig. 4 a, shows second embodiment of brake system according to the invention;
Fig. 6 is the forward view of a linear actuating device, is combined with the 3rd embodiment of brake system according to the invention in this linear actuating device;
Fig. 7 is the partial side view of linear actuating device shown in Fig. 6;
Fig. 8 is the cutaway view of VIII-VIII in Fig. 7, and this moment, braking system was in mated condition;
Fig. 9 a is the cutaway view of IX-IX in Fig. 7, and this moment, braking system was in mated condition;
Fig. 9 b is the cutaway view of IX-IX in Fig. 7, and this moment, braking system was in the disengaging mated condition; And
Figure 10 is a view that is similar to Fig. 9 a, shows the 4th embodiment of brake system according to the invention.
Detailed description of the preferred embodiment
Fig. 1 to 4 shows a kind of braking system of the present invention that is used to implement, and when energy was supplied with interruption, this braking system can cooperate.Illustrated linear actuating device 1 comprises: a guide rail 4, this guide rail 4 comprise a pair of closed slide member 4 that is connected on the underframe 5; A workbench 3, this workbench 3 is supported on the guide rail 4 via four slider 2a to 2d, and slider 2a to 2d is guided slidably by guide rail 4; A linear motor, this linear motor include the standing part 6 and the moveable part 7 that is connected on workbench 3 lower surfaces that are connected on the underframe 5, and this moveable part 7 is opposed with fixed part 6; And a position transducer, this position transducer includes a standing part 9 and a moveable part 10.
Each guide rail component in the guide rail 4 all has a upper horizontal surface 11 and a pair of side surface 12, this to side surface 12 from the upper end of an adjacent upper surface 11 to its bottom diagonally extending opposite to each other.Therefore, when observing in the cross section, each side surface 12 and upper surface 11 limit an acute angle jointly.In the present embodiment, the bottom of each guide rail component is wide equally with described upper surface basically, thereby makes described guide rail component limit a pair of vee-cut at its either side.
Fig. 1 shows two 2a in four fronts among the slider 2a to 2d and 2c, and because two slider 2b in back and 2d and two of fronts have same structure, so following description will be confined to two 2a in front and 2c are described.Each slider 2a and 2c all are securely connected on the lower surface of the respective corners of rectangular table 3, and all have the C shape cross section of a rectangle, and this C shape cross section has the uncovered end of a faced downwards.A pair of slide block 15 and 16,25 and 26 is contained among each slider 2a and the 2c in such a way, promptly under the condition without any play basically, corresponding guide rail member and described slider cooperate, and wherein said slide block 15,16,25 and 26 all has rectangular basically leg-of-mutton cross section.More particularly, the lower surface of each slider is engaged on the upper surface 11 of respective track member via a bearing carrier 14, bearing carrier 14 is connected on the described slider in this case, and the inclined side of each slide block 15,16,25 and 26 all is engaged on the corresponding inclined side surfaces 12 of guide rail 4 via similar bearing carrier 14.
In the present embodiment, the slide block 25 and 26 that is used for slider 2c shown on the left of in accompanying drawing 1 all is fixed on corresponding slider 2c.As for the slider 2a shown in the right side in Fig. 1, a slide block 15 that is positioned at the inboard is fixed on this slider, and the slide block 16 outside another one is positioned at simultaneously is held, so that can transversely move at particular range.
The slider 2a that includes removable slide block 16 additionally has a spiral piping arrangement 8a, this spiral piping arrangement 8a includes an electromagnet 17 and an armature 18, this armature 18 comprises a shape body part 18a, this main part 18a medially passes a perforation and the respective perforations that runs through slider 2a on the cap member that is formed at spiral piping arrangement, and guide by described perforation, first end 18b on removable slide block 16 that is spirally connected or otherwise is connected in, and a second end 18c who is disc-shape, so that when electromagnet 17 energisings, be adsorbed to (slider 2b has a spiral piping arrangement 8b similarly) on this electromagnet 17.As shown in Figure 3, a pair of perforation 20 runs through slider 2a, and each perforation 20 all is connected with a groove 19 that is formed on the removable slide block 16.A compression helical spring 21 is placed in each perforation 20, thereby makes the medial end of helical spring 21 be placed in the corresponding grooves 19, and the outboard end of each perforation 20 is closed by a bolt 22.Screw out by each bolt 22 being screwed in the perforation 20 and from this perforation 20, can be regulated the spring force of compression helical spring 21.This spring force has determined the braking force that produced by described braking system.
Therefore, when spiral piping arrangement 8a did not switch on, removable slide block 16 was pressed against on the corresponding inclined side surfaces 12 of guide rail 4 via bearing carrier 14, and the spring force of helical spring 21 is selected, so that produce required braking force.When spiral piping arrangement was switched on, the spring force that armature 18 can overcome helical spring 21 spurred the inclined side surfaces 12 of removable slide block 16 away from guide rail 4, caused workbench 3 to move along guide rail 4 under the condition without any friction basically.Therefore spiral piping arrangement 8a is in "on" position usually, and keeps described braking system to break away from cooperation, but under power failure or other abnormal conditions, can apace described braking system be cooperated.Gap between each bearing carrier 14 and the opposed side surface 12 (illustrating in more or less exaggerative mode in Fig. 4 b) is selected in such a way, promptly under the disengaging mated condition of described braking system, guide rail 4 all is within the permissible range with cooperate play and frictional force between the slider 2a.
In the present embodiment, such as shown in Figure 2, a pair of brake unit is set at a side of workbench 3, and spiral piping arrangement 8a and 8b and helical spring 21 act on the slide block 16 of the outside.When each brake unit was engaged, corresponding helical spring 21 can promote corresponding slide block 16 and be pressed against on the respective side surface 12 of guide rail 4.Pressure on the side surface 12 can produce a vertical component, and cooperates via bearing carrier 14 between the lower surface of the upper surface 11 of this component by guide rail 4 and slider 3 and born.Meanwhile, can be by the pressure that removable slide block 16 puts on the side surface 12 towards spiral piping arrangement 8a pulling slider 2a, causing fixedly, slide block 15 is carried on the respective side surface 12 of guide rail 4.Thereby, spring force force slide block 15 and 16 and slider 2a be pressed against on the guide rail 4 from three directions.Also have, in illustrated embodiment, bearing carrier 14 both provided slidingsurface to come the member that the motion of workbench 3 is guided with acting on, and also provided brake area to come workbench 3 is carried out the member of friction catch with acting on.
Although described braking system only is set at a side of workbench 3,, can produce braking force in the both sides of workbench 3 by determining the gap between guide rail 4 and slider 2a and the 2c suitably.More particularly, when spiral piping arrangement 8a outage and removable slide block 16 were urged on opposed inclined surface 12, the reaction force that is produced can make workbench 3 be pulled to spiral piping arrangement 8a.If various sizes are selected in such a way, promptly be urged on the opposed inclined surface 12 of guide rail 4 and compare with the inboard slide block 15 that is positioned at spiral piping arrangement 8a side, utilize big pressure to press against away from the outside slide block 26 of spiral piping arrangement 8a side on the opposed inclined surface 12 of guide rail 4, in fact the braking force of so described braking system produced by outside slide block 16 and 26, thereby cause braking force laterally to be put on equably on the workbench 3, and do not have moment or other force action on described slider or braking system.
In illustrated embodiment, removable slide block 16 is placed in the outside of corresponding slider 2a, but it also can be placed in the inboard of slider 2a.In this case, can be by determining the various gaps and the size of described slider in such a way, promptly be urged on the opposed inclined surface 12 of guide rail 4 and compare with the outside slide block 15 that is positioned at spiral piping arrangement 8a side, utilize big pressure to press against on the opposed inclined surface 12 of guide rail 4, thereby obtain uniform braking action away from the inboard slide block of spiral piping arrangement 8a side.
In the aforementioned embodiment, bearing carrier 14 is securely connected on the side of slider (lower surface of slider and the inclined side of slide block), and this configuration allows to use less relatively bearing carrier.But, if desired, also some or all bearing carriers can be connected on the guide rail 4.Also have, as those skilled in the art can understand easily, the number of slider and braking system can freely be chosen.If workbench has bigger size, desirable being to use surpasses four sliders.Also have, described brake unit can be arranged on either side with symmetric mode, and/or can according to whether the size of the uniform braking action of needs and/or deceleration loading, freely choose the number of brake unit.
The material that is used for bearing carrier 14 can be selected from any that can obtain loading material in a large number.Desirablely be, this material has necessary abrasive resistance and load capacity, and desirable be can not damage such as the such opposed members of guide rail, described guide rail is generally made by stainless steel.Desirablely be, load-carrying unit has suitable coefficient of friction, and according to the pressure that is put on by them on the counter surface, described coefficient of friction can make them not only as sliding component but also as braking element.The preferable range of the static friction coefficient of support materials is from 0.15 to 0.25.
The preferred material that satisfies described condition is comprised the porous ceramic film material that is commonly referred to as the RB pottery.The RB pottery is a kind of non-lubricating friction material, and generally then mixture is carried out sintering and be prepared from by rice bran or other wooden base or plant base material and phenolic resins are mixed.A kind of really realization preferred material of the present invention of the verified this material of the inventor.But this does not also mean that and has got rid of other material.On the contrary, also have many other materials that can use with same satisfactory way.
Fig. 5 shows the second embodiment of the present invention, and with previous embodiment in corresponding parts utilize same numbers to refer to.In the aforementioned embodiment, removable slide block has equal lengths basically with corresponding slider, and these two parts together extend in the longitudinal direction.In this second embodiment, slider 2a has a groove 27, is used for a ccontaining therein removable slide block 16.Therefore, the slidingsurface of groove 27 provide a kind of be used for removable slide block 16 towards with deviate from the guide function that moves in rail-sides surface 12.Also have, removable slide block 16 has the length more much smaller than slider 2a, thereby this removable slide block 16 via a bearing carrier 14 on the opposed inclined surface 12 that is pushed to guide rail 4 on the less relatively surface area, and according to the attribute of bearing carrier 14 own, this will provide a kind of better braking action.
Fig. 6 to 9 shows the third embodiment of the present invention, and with previous embodiment in corresponding parts utilize same numbers to refer to.In the present embodiment, when supply of electrical energy, braking system can cooperate.The armature 18 of spiral piping arrangement 8a has a shape body part 18a, first end 18b on removable slide block 16 that is spirally connected or otherwise is connected in, and a second end 18c who is disc-shape, be attracted on this electromagnet 17 when switching on convenient electromagnet 17.In the present embodiment, opposite with first embodiment, shape body part 18a medially passes electromagnet 17, and is subjected to the guide function of electromagnet 17, and the second end 18c of armature 18 and the magnetic gap between the electromagnet 17 are formed at electromagnet 17 sides away from removable slide block 16.Compression helical spring 30 is placed between the counter surface that is connected in snap ring 31 on the shape body part 18a and removable slide block 16.Therefore, when electromagnet 17 energisings, described braking system can overcome helical spring spring force and cooperate under the effect of spiral piping arrangement 8a.When electromagnet 17 outages, described braking system breaks away from cooperation under the spring force effect of helical spring 30.
Solenoid generally is connected on the emergency power supply, and electric energy is provided when occurring with the described demand of box lunch.Therefore, solenoid is in off-position usually, and can not consume any electric energy when not in use.When electric energy disappears from solenoid, need not any other device, described braking system can break away from cooperation under the spring force effect of helical spring 30.
Figure 10 shows the fourth embodiment of the present invention, and with previous embodiment in corresponding parts utilize same numbers to refer to.In the aforementioned embodiment, removable slide block has equal lengths basically with corresponding slider, and these two parts together extend in the longitudinal direction.In the 4th embodiment, slider 2a has a groove 37, is used for a ccontaining therein removable slide block 16.Therefore, this embodiment provides the similar advantage to second embodiment shown in Fig. 5.
Although invention has been described at the preferred embodiments of the present invention; but for the skilled artisan in the art; under the condition that does not break away from the protection range of the present invention of in claims, stating, can carry out multiple replacement and modification.
Claims (10)
1. braking system that is used for linear actuating device comprises:
A guide rail;
A workbench, this workbench comprises a slider, this slider is guided by described guide rail, be used for moving along the length direction of described guide rail, described slider comprises a removable slide block, this removable slide block is suitable for sliding along the surface of described guide rail, and is provided support by described slider, so as towards with deviate from described guide rail surface and move;
A linear motor is used to order about described workbench and moves along described guide rail; And
An electric actuator is used for optionally making described removable slide block to move towards described guide rail surface;
Under first state of described electric actuator, described removable slide block slides on described guide rail surface, be used for guide function, and under second state of described electric actuator, described removable slide block is carried on the described guide rail, has been used for braking action.
2. according to the described braking system that is used for linear actuating device of claim 1, it is characterized in that: described electric actuator comprises a spiral piping arrangement and a spring member, described spiral piping arrangement is used for making described slide block move towards described guide rail surface that described spring member is used for making described slide block move away from described guide rail surface when described spiral piping arrangement cuts off the power supply when energising.
3. according to the described braking system that is used for linear actuating device of claim 1, it is characterized in that: described electric actuator comprises a spiral piping arrangement and a spring member, described spiral piping arrangement is used for making described slide block move away from described guide rail surface that described spring member is used for making described slide block move towards described guide rail surface when described spiral piping arrangement cuts off the power supply when energising.
4. according to the described braking system that is used for linear actuating device of claim 1, it is characterized in that: described guide rail comprises a pair of guide rail component that is parallel to each other, and described workbench comprises a pair of slider of laterally arranging with corresponded manner.
5. according to the described braking system that is used for linear actuating device of claim 4, it is characterized in that: each described guide rail component all has a upper surface and a pair of side surface, each side surface all forms an acute angle with respect to described upper surface, and have a lower surface that is engaged on the described upper surface one of in the described slider, one fixedly slide block be engaged in that one of described side surface is gone up and described removable slide block is engaged on another of described side surface.
6. according to the described braking system that is used for linear actuating device of claim 5, it is characterized in that: the another one in the described slider has the lower surface that is engaged on the described upper surface, and a pair of fixedly slide block is engaged on the respective side surface of described guide rail.
7. according to the described braking system that is used for linear actuating device of claim 6, it is characterized in that: described slider is processed in such a way, promptly when described electric actuator is in described second state, in removable slide block in the described slider and described another slider one fixedly slide block be carried on the respective side surface of described guide rail, wherein said fixedly slide block and described removable slide block are symmetrical arranged.
8. according to the described braking system that is used for linear actuating device of claim 1, it is characterized in that: a bearing carrier is placed between described slide block and the guide rail surface.
9. the described according to Claim 8 braking system that is used for linear actuating device is characterized in that: described bearing carrier has one 0.15 to 0.25 static friction coefficient with respect to counter surface.
10. the described according to Claim 8 braking system that is used for linear actuating device is characterized in that: described bearing carrier is a kind of porous carbonaceous material, and this porous carbonaceous material carries out sintering by the mixture to plant base carbon and phenolic resins and is prepared from.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03155122 CN1585240A (en) | 2003-08-22 | 2003-08-22 | Braking system for linear actuating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03155122 CN1585240A (en) | 2003-08-22 | 2003-08-22 | Braking system for linear actuating device |
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| Publication Number | Publication Date |
|---|---|
| CN1585240A true CN1585240A (en) | 2005-02-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03155122 Pending CN1585240A (en) | 2003-08-22 | 2003-08-22 | Braking system for linear actuating device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104302950A (en) * | 2013-03-04 | 2015-01-21 | 日本精工株式会社 | Actuator, and precision machinery provided with same |
| CN106300875A (en) * | 2016-08-30 | 2017-01-04 | 吉林大学 | Cluster linear electric motors actuator |
| CN106892321A (en) * | 2017-05-04 | 2017-06-27 | 常州工学院 | Cordless elevator braking safety device |
| CN110022047A (en) * | 2019-03-15 | 2019-07-16 | 武汉船用机械有限责任公司 | The guide rail and its installation method of linear motor |
-
2003
- 2003-08-22 CN CN 03155122 patent/CN1585240A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104302950A (en) * | 2013-03-04 | 2015-01-21 | 日本精工株式会社 | Actuator, and precision machinery provided with same |
| CN106300875A (en) * | 2016-08-30 | 2017-01-04 | 吉林大学 | Cluster linear electric motors actuator |
| CN106892321A (en) * | 2017-05-04 | 2017-06-27 | 常州工学院 | Cordless elevator braking safety device |
| CN106892321B (en) * | 2017-05-04 | 2019-01-15 | 常州工学院 | Cordless elevator braking safety device |
| CN110022047A (en) * | 2019-03-15 | 2019-07-16 | 武汉船用机械有限责任公司 | The guide rail and its installation method of linear motor |
| CN110022047B (en) * | 2019-03-15 | 2020-10-27 | 武汉船用机械有限责任公司 | Guide rail of linear motor and installation method thereof |
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