CN207470717U - A kind of straight line actuation mechanism with cramped construction - Google Patents
A kind of straight line actuation mechanism with cramped construction Download PDFInfo
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- CN207470717U CN207470717U CN201721292467.3U CN201721292467U CN207470717U CN 207470717 U CN207470717 U CN 207470717U CN 201721292467 U CN201721292467 U CN 201721292467U CN 207470717 U CN207470717 U CN 207470717U
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Abstract
The utility model is related to a kind of straight line actuation mechanism with cramped construction, wherein leading screw (1) left end is supported by the spring bearing group (8) being located between bearing front support (81) and bearing rear support (82)；Leading screw (1) right end is equipped with support oriented device (9) and puts in the push rod housing of push-rod assembly (4)；Push-rod assembly (4) left end connects with the nut (2) on leading screw (1), and right end does guide support by the push rod guide sleeve being loaded in cylinder barrel drive end bearing bracket (7), and stretches out cylinder barrel drive end bearing bracket (7)；There is sliding slot (31) on cylinder barrel (3)；The anti-rotational guider (5) being fixed on nut (2) is partly stretched into the sliding slot (31) of cylinder barrel (3)；Trunnion plate (13) is fixed on the front and rear side of fixed plate (10) and cylinder barrel drive end bearing bracket (7)；On cylinder barrel (3), the magnetite component coordinated with it is fixed on push rod flange limit switch (12).The utility model can reduce processing cost, and compact-sized.
Description
Technical field
The utility model is related to straight line actuation mechanism more particularly to a kind of straight line actuation mechanisms with cramped construction.
Background technology
With the rapid development and progress of modern industry and equipment manufacture, in pushing away for digital technology and microprocessing etc.
It moves under the influence of, people are higher and higher to the performance of equipment execution terminal and the precision controlling requirement of running position.Conventional hydraulic,
Pneumatic actuator is due to its position poor controllability, inconvenient maintenance, system structure is complicated, sensitivity is poor, environmental sensibility is high, and
The features such as causing larger leakage and noise pollution, has been difficult in adapt to the needs of current industrial development.And with electronic technology
High speed development, the problems such as speed regulating control and power density for restricting electric drive is gradually resolved, and then electric drive apparatus has been
It is increasingly becoming the new main trend in current actuation techniques field.
In electric drive apparatus, the servo electric jar of one of Electric Actuator as straight line actuation mechanism is (hereinafter referred to as electronic
Cylinder) it is the dynamic foundation component to grow up with the development of modern industry and gradually, it is higher as integrated level and precision
Straight line actuation mechanism, can by the convert rotational motion of motor for linear motion.
In the known straight line actuation mechanism with feed screw nut, using servomotor as power, leading screw rotation is driven
Turn, and pass through the rotation for constraining nut and the linear movement guide that ensure nut, to realize the push-rod assembly being connect with nut
Linear motion.
Traditional anti-rotational guider is typically by being provided with sliding groove structure on nut, while in the inner surface of cylinder barrel
Anti-rotational item is fixed with, it is inevasible in this way to constrain the rotary motion of nut and ensure that the linear movement guide of nut
Special design and processing can be carried out to nut, and the oversized of entire electric cylinder can be caused, leads to being processed into for equipment
This can also rise, occupied space can also increase.
Utility model content
The purpose of this utility model is in view of the problems of the existing technology, to provide a kind of straight line with cramped construction and make
Motivation structure can reduce processing cost, and can reduce the size of electric cylinder, so that the structure of straight line actuation mechanism is more
It is compact.
The purpose of this utility model is achieved through the following technical solutions：
The utility model provides a kind of straight line actuation mechanism with cramped construction, including：
Leading screw；Nut；Cylinder barrel；Push-rod assembly；Anti-rotational guider；Buffering stop block；Cylinder barrel drive end bearing bracket；Support shaft
Hold group；Bearing front support；Bearing rear support；Support oriented device；Fixed plate；Magnetite component；Limit switch；Trunnion plate and power
Unit；
The cylinder barrel is fixed between cylinder barrel drive end bearing bracket and bearing rear support；The motor of bearing rear support and power unit
It is parallel to be fixed in fixed plate；
The left end of leading screw is supported by the spring bearing group being installed between bearing front support and bearing rear support；The right side of leading screw
End is put in equipped with support oriented device inside the push rod housing of push-rod assembly；The push-rod assembly left end and the spiral shell on leading screw
Parent phase connects；Push-rod assembly right end does guide support by the push rod guide sleeve being installed in cylinder barrel drive end bearing bracket, and stretches out cylinder barrel front end
Lid；The operating of leading screw provides power by power unit；
Sliding slot is provided on the cylinder barrel；The sliding slot of cylinder barrel is stretched into anti-rotational guider part on the nut
In；
The trunnion plate is fixed on front side and the rear side of fixed plate and cylinder barrel drive end bearing bracket；
Limit switches are installed on the cylinder barrel, the magnetite component being used cooperatively with limit switch is fixed on push-rod assembly
On push rod flange.
It is highly preferred that the nut two side ends are symmetrically provided with plane；The anti-rotational guider is two, each anti-rotation
Turn being fixed on one side in the plane of the nut side for guider, another side is stretched into the sliding slot of the cylinder barrel, and can
It is moved in a straight line along the sliding slot.
It is highly preferred that the anti-rotational guider includes：
Feather key, feather key set and feather key screw；
The feather key is fixed on by single feather key screw in the plane of nut side；
The feather key set is installed on the outside of feather key, and the feather key is wrapped；The feather key set stretches into described
In the sliding slot of cylinder barrel, and coordinate with the sliding slot, can be moved in a straight line along the sliding slot.
It is highly preferred that
Groove is opened up on the outer ring of the push rod flange, the top of the groove and one end have opening, end
Opening has the side of bolt towards push rod flange；And the two neighboring bolt on push rod flange is symmetrically arranged at the groove
Center line both sides；The magnetite component is fixed in the groove of push rod flange of the push-rod assembly；
T-shaped sliding slot is provided on the cylinder barrel barrel, the limit switch is two, in the T types sliding slot,
And operation initial position and the final position of push rod flange are corresponded to respectively；
The magnetite component is driven by the push-rod assembly and runs, when the limit switch is located at the sense of the magnetite component
When answering magnetic field, limit switch action.
It is highly preferred that the magnetite component includes：
Magnetite, magnetite set, magnetite pressing plate and fastener；
The magnetite set is the bucket body structure with accommodating cavity, and the top of the bucket body structure is milled with a plane along longitudinal direction；
The accommodating cavity extends to the right the right end of bucket body structure, extends upwardly to plane；Magnetite set is installed to straight line start
In the groove opened up on the push rod flange outer ring of mechanism；
The magnetite is mounted in the accommodating cavity of magnetite set；
The right end of the magnetite is withstood by magnetite pressing plate；
The magnetite pressing plate is fixed on by fastener on the end face of push rod flange of straight line actuation mechanism.
It is highly preferred that the sensing center of the limit switch is located on the center of magnetite and the line of push rod flange center.
It is highly preferred that the buffering stop block includes：
Left buffering stop block and right buffering stop block；
The left side of the left buffering stop block is close to the groove body bottom of bearing front support right side, left buffer limit dress
The right side freedom put and opposite nut；
The right side of the right buffering stop block is mounted on the left side of the cylinder barrel drive end bearing bracket by bonding mode；It is right
The left side freedom of buffering stop block and the opposite push rod flange for being arranged on push-rod assembly right end.
It is highly preferred that the left buffering stop block includes：
First cushion pad and buffer substrate tablet；
The outer ring of first cushion pad is tapered, and middle part is provided with bellmouth, forms annular ring wide at the top and narrow at the bottom；Its middle ring
Shape circle broad side is close to the groove body bottom of the bearing front support right side；Wherein the relatively narrow side of annular ring is provided with groove, the buffering
Piece is metal buffer piece, is mounted on by bonding mode in the groove of the first cushion pad, and the right end of the buffer substrate tablet is against nut.
It is highly preferred that the support oriented device includes：
Support guide head, fastener and thrust washer；
The support guide head is mounted on the spindle nose of the leading screw, and is fixed only with fastener in the spindle nose end of leading screw
Pushing pad piece；
The support guide head is clearance fit between the push rod housing inner wall of outer circle and push-rod assembly radially,
Matching between its inner wall and leading screw spindle nose is combined into clearance fit；
The support guide head is clearance fit between the shaft shoulder and thrust washer of leading screw in the axial direction.
It is highly preferred that
On the inside of the trunnion plate step, and the baseplane of the step and the tablet are respectively equipped with close to the position at both ends
The end of structure communicates, and forms two connection planes；The first mounting hole is provided in one of connection plane, with fixed plate end
Bolt hole on face coordinates to install trunnion plate fastening bolt；The second mounting hole is provided in another connection plane, with cylinder
The bolt hole of cylinder drive end bearing bracket end face coordinates to install trunnion plate fastening bolt；Trunnion hole is provided in the trunnion harden structure, is used for
Connect trunnion；
The depth of the step is set as H, and the H meets：B/2<H<B, wherein B are the thickness of trunnion plate；
If the distance between the step at trunnion plate both ends is L, then the L meets following relationship：
L=L0-S
Wherein, L0 be theoretical length value, the L0=L1+L2, wherein L1 represent cylinder barrel front end face to rear end in step it
Between distance, L2 represents that step is to the distance between bearing rear support and fixed plate phase-contact surface in the rear end of cylinder barrel；S is cylinder barrel
Pre-tighten decrement.
The utility model has the following technical effect that it can be seen from above-mentioned the technical solution of the utility model：
The utility model constrains the rotary motion of nut and ensures the linear motion of nut by anti-rotational guider
It is oriented to, when installing the anti-rotational guider, symmetrical both ends of the surface only need to be milled on nut, relative to the prior art
The structure of sliding slot is opened up on nut, processing is simple, at low cost；And the inner surface of electric cylinder cylinder barrel is anti-rotational without fixation
Item, so the oversized of entire electric cylinder will not be caused.
Magnetite component is fixed on straight line by the utility model by opening up groove on the push rod flange outer ring of push-rod assembly
In the groove of the push rod flange of actuation mechanism so that the appearance and size of cylinder barrel barrel will not become larger because of installation limiting device,
So as to ensure that the volume of whole equipment, the manufacture cost of equipment is saved；And the utility model passes through magnetite component and limit
The cooperation of bit switch can realize the accurate control to push rod running position.
The utility model increases buffering stop block in prior art basis, in push-rod assembly operational process, leads to
This buffering stop block is crossed, avoids push rod housing and servo motor by larger impact force, therefore can ensure pushing rod sleeve
Cylinder and servo motor etc. will not be damaged because of larger impact force or overload；Moreover, by setting metal in cushion pad
The structure of buffer substrate tablet so that the installation space of buffering stop block is small, is particularly suitable for contact area smaller scene during buffering.
The utility model by support guide head radially with the push rod housing inner wall of push-rod assembly and leading screw spindle nose it
Between for clearance fit, be in the axial direction clearance fit between the shaft shoulder of leading screw and thrust washer, can ensure to prop up
Guide head is supportted not as leading screw operates together, therefore abrasion and the raising of support guide head and push rod housing inner wall can be reduced
Efficiency.
The utility model is respectively equipped with step by the position close to both ends on the inside of trunnion plate, passes through the step
Depth H value allows trunnion plate directly to transmit the force to fixed plate and cylinder barrel drive end bearing bracket by itself step；By this two
Length value between a step causes the step side of trunnion plate and fixed plate medial surface, and (i.e. fixed plate is against cylinder barrel front end face
One side) between can there are gap S, during so as to ensure that straight line actuation mechanism by 90kN pulling force or pressure, cylinder barrel will not and cylinder
Gap is generated, therefore can cause between trunnion plate and fixed plate, trunnion plate and cylinder barrel drive end bearing bracket between cylinder drive end bearing bracket or fixed plate
Stress equalization.
Description of the drawings
Fig. 1-1 is the internal structure schematic diagram of the utility model straight line actuation mechanism；
Fig. 1-2 is the outer shape schematic diagram of the utility model straight line actuation mechanism；
Fig. 2-1 is the front view of cylinder structure in the utility model；
Fig. 2-2 is the side view of cylinder structure in the utility model；
Fig. 2-3 is the close-up schematic view in the I portions in Fig. 2-2；
Fig. 3-1 is the schematic view of the mounting position of anti-rotational guider in the utility model；
Fig. 3-2 is the structure diagram of anti-rotational guider in the utility model；
Fig. 3-3 is the partial enlarged view in I portions in Fig. 3-2；
Fig. 4-1 is the structure diagram of the support oriented device in the utility model；
Fig. 4-2 is the structure diagram of the support guide head in the application；
Fig. 4-3 is the A-A sectional views in Fig. 4-2；
Fig. 5-1 is the schematic view of the mounting position of the buffering stop block in the utility model；
Fig. 5-2 is the partial enlarged view in A portions in Fig. 5-1；
Fig. 5-3 is the partial enlarged view in B portions in Fig. 5-1；
Fig. 5-4 is the structure diagram of left buffering stop block；
Fig. 6-1 is the structure diagram of the limiting device in the utility model；
Fig. 6-2 is the structure diagram of the magnetite component in limiting device；
Fig. 7-1 is the structure diagram of the trunnion plate of the application；
Fig. 7-2 is the schematic view of the mounting position of the trunnion plate of the application；
Fig. 7-3 is the partial enlarged view in A portions in Fig. 7-2；
Fig. 7-4 is the partial enlarged view in B portions in Fig. 7-2.
In figure：
Leading screw 1；Nut 2, plane 21；Cylinder barrel 3, sliding slot 31；Push-rod assembly 4；Anti-rotational guider 5, is led at feather key 51
To key set 52, feather key screw 53；Buffering stop block 6, left buffering stop block 61, right buffering stop block 62；First is slow
Rush pad 611, buffer substrate tablet 612；Second cushion pad 621；Cylinder barrel drive end bearing bracket 7；Spring bearing group 8；Bearing front support 81；It is propped up after bearing
Support 82；Support oriented device 9；Support guide head 91, fastener 92 and thrust washer 93；Fixed plate 10；Magnetite component 11, magnetite
11-1, magnetite set 11-2, magnetite pressing plate 11-3 and the first fastener 11-4；Limit switch 12；Trunnion plate 13；First mounting hole
13-1, the second mounting hole 13-2, trunnion hole 13-3 and step 13-4；Trunnion 14；Power unit 15.
Specific embodiment
The technical solution of the utility model is described in further details below with reference to attached drawing.
Embodiment one
The utility model provides a kind of straight line actuation mechanism with cramped construction, structure such as Fig. 1-1 and Fig. 1-2 institutes
Show, including：
Leading screw 1；Nut 2；Cylinder barrel 3；Push-rod assembly 4；Anti-rotational guider 5；Buffering stop block 6；Cylinder barrel drive end bearing bracket
7；Spring bearing group 8；Bearing front support 81；Bearing rear support 82, support oriented device 9；Fixed plate 10；Magnetite component 11；Limit
Bit switch 12；Trunnion plate 13；Trunnion 14；Power unit 15.
Fixed plate 10 is used to fix power unit 15 and bearing rear support 82.Cylinder barrel 3 is fixed on cylinder barrel drive end bearing bracket 7 and axis
It holds between rear support 82；
Power unit 15 provides power for the operating of leading screw 1, including servo motor and transmission parts.In servo motor
Under driving, after slowing down by transmission parts and change transmission direction, power is transmitted to leading screw 1 to determine reduction ratio.
The left end of leading screw 1 is supported by spring bearing group 8, and spring bearing group 8 uses two groups of angular contact bearings installed in the same direction,
And it is installed in bearing front support 81 and bearing rear support 82 using back-to-back mode and then is integrally built between two groups of bearings
In cylinder barrel 3.The right end of leading screw 1 is equipped with support oriented device 9, and support oriented device 9 puts in the push rod housing of push-rod assembly 4
It is internal.The external cooperation installation nut 2 of leading screw 1, nut 2 are connected with 4 left end of push-rod assembly.The right end of push-rod assembly 4 is by pacifying
Guide support is done, and stretch out cylinder barrel drive end bearing bracket 7 loaded on the push rod guide sleeve in cylinder barrel drive end bearing bracket 7.
Sliding slot 31 is provided on above-mentioned cylinder barrel 3；Anti-rotational guider 5 is fixed on nut 2, the anti-rotational guider 5
Part is stretched into the sliding slot of cylinder barrel 3, and to limit nut 2 with the rotation of leading screw 1, contour rotates.When leading screw 1 rotates, due to cylinder
The circumferential effect of contraction of 3 pairs of nuts 2 of cylinder, nut 2 drive push-rod assembly 4 to be moved in a straight line in cylinder barrel 3.
3 one end of cylinder barrel is fixed on by bearing rear support 82 in fixed plate 10, and the other end is sealed by cylinder barrel drive end bearing bracket 7.Ear
Axillare 13 is two, respectively in the front side and rear side of fixed plate 10 and cylinder barrel drive end bearing bracket 7.Trunnion 14 is fixed on trunnion plate 13；
The trunnion 14 is used to entire straight line actuation mechanism being fixed on ear mount.
Limit switches 12 are installed, the magnetite component being used cooperatively with limit switch 12 is fixed on push-rod assembly 4 on cylinder barrel 3
Push rod flange on, the two is used cooperatively, and the initial position of 4 stroke of push-rod assembly and final position can be defined.
It describes in detail below to the function and structure of following several key components and parts：
First, cylinder barrel 3
Cylinder barrel 3 mainly plays the role of carrying, sealing and guiding.Its structure is as shown in Fig. 2-1, Fig. 2-2 and Fig. 2-3, cylinder barrel
3 interior designs sliding slot 31, fixed anti-rotational 5 part of guider is stretched into the sliding slot 31 of cylinder barrel 3 on nut 2, with limitation
The contour rotation with the rotation of leading screw 1 of nut 2, so as to ensure that linear motion of the convert rotational motion of leading screw 1 for nut 2.
3 inside left of cylinder barrel is designed with First terrace 32, is used to implement and is bonded with 8 end face of bearing front support；Cylinder barrel 3
Inner right side is designed with second step face 33, is installed for coordinating with cylinder barrel drive end bearing bracket 7, realizes fixed position-limiting action.
In order to realize the compactedness of structure, four corners of the outer surface of cylinder barrel 3 devise arc gap 34, for support
There are enough installation spaces for the installation of stud.The supporting studs are used to the cylinder barrel being fixed on fixed plate and cylinder barrel drive end bearing bracket
On.
For convenience of dress limit switch 12,3 one side of cylinder barrel is designed with T-shaped sliding slot 35.
The material selection aluminium alloy of cylinder barrel 3, is integrally formed using using hot extrusion molding technique, and processing technology is simple.
2nd, anti-rotational guider 5
Anti-rotational guider 5 is two, installation site as shown in figure 3-1, the one side of each anti-rotational guider 5
It is fixed in the plane 21 of 2 side of nut, another side is stretched into the sliding slot 31 of the cylinder barrel 3, and can be along the cunning
Slot 31 moves in a straight line.
In the straight line actuation mechanism course of work, while leading screw 1 rotates, anti-rotational 5 one side of guider, energy
Enough constrain the rotation of nut 2 so that the convert rotational motion of leading screw 1 is the linear motion of nut 2；On the other hand, it is ensured that
Nut 2 carries out linear slide in the sliding slot 31 of 3 inner wall of cylinder barrel.
For the structure of the anti-rotational guider as shown in Fig. 3-2 and Fig. 3-3, which includes feather key
51st, feather key set 52, feather key screw 53.
Feather key 51 is fixed on by single feather key screw 53 in the plane 21 of 2 side of nut, for limiting nut 2
Rotary motion；Feather key set 52 is installed on the outside of feather key 51, and wrapped；Feather key set 52 stretches into the cylinder barrel
In 3 sliding slot 31, and coordinate with the sliding slot 31 of cylinder barrel 3, can be moved in a straight line along the sliding slot 31.It is filled in straight line start
It puts in motion process, feather key set 52 is directly contacted with 31 inner wall of the sliding slot of cylinder barrel 3, for linear motion in sliding slot 31.
Above-mentioned feather key set 52 is non-metal guide key set, and material can select cotton fiber to enhance phenolic resin plate, this
Kind nonmetallic materials cause feather key set to have good antiwear characteristic.
It, can shell structure interior in the sliding slot 31 of 3 inner wall of cylinder barrel in advance and feather key set 52 when installing the application
Internal cavities in add lubricating grease, such that nut 23 inner wall of cylinder barrel sliding slot 31 in carry out linear slide when more
It is smooth, and the abrasion between feather key set 52 and 31 inner wall of sliding slot of cylinder barrel 3 can be reduced.Greasing, life cycle management use,
Constant feast.
By the way that feather key 51 to be fixed on to the side end face of nut 2,52 are covered in the external installation feather key of feather key 51, by leading
Coordinate to key set 52 and the sliding slot 31 of cylinder barrel 3, this avoid directly connecing between the sliding slot 31 in feather key 51 and cylinder barrel
It touches, friction is mainly undertaken by feather key set 52, the sliding slot 31 in feather key 51 and cylinder barrel is protected to a certain extent, slows down
Abrasion between cylinder barrel 3 and feather key 51 further improves the service life of feather key 51 and cylinder barrel 3, so that straight line is made
Motivation structure can keep transmission accuracy.
Feather key set 52 is readily replaceable, can realize quick replacement and dimension after the entire anti-rotational abrasion of guider 5
It repaiies.
Feather key is fixed on nut 2 by using single screw, can be turned in the plane 21 of 2 side of nut
Dynamic, similar plane is hinged.Under the premise of ensureing that hinged center is located on symmetrical plane, on the one hand in anti-rotational guider 5
During being packed into cylinder barrel 3, can installation be adapted to self adjustment rotation angle；On the other hand, in the electric cylinder course of work, peace
Anti-rotational guide frame 5 loaded on 2 both sides transverse plane of nut has certain adaptability, and when discontinuity can be with self corrective action
Distribution of the power along contact plane, so that feather key covers 52 more uniform wears, so that the straight line equipped with the application makees motivation
Structure can keep transmission accuracy.
3rd, support oriented device 9
In order to ensure in the straight line actuation mechanism course of work, leading screw 1 and do not have between the push rod housing inner wall of push-rod assembly 4
There are mutual contact and friction, as shown in Fig. 4-1, support oriented device 9 is mounted on the spindle nose of leading screw 1.It is led by the support
To device 9, on the one hand sliding support can be played the role of to the structure of leading screw 1, to avoid the screw thread and push-rod assembly of leading screw 1
Being in direct contact between 4 push rod housing inner wall protects service precision and the service life of 1 screw thread of leading screw；On the other hand can reduce
Frictional force plays the role of sliding support.
The support oriented device 9 includes support guide head 91, fastener 92 and thrust washer it can be seen from Fig. 4-1
93.The spindle nose of the axial movement of support guide head 91 abjection leading screw 1 in order to prevent, it is solid with fastener 92 in the spindle nose end of leading screw 1
Determine thrust washer 93.
The structure of above-mentioned support guide head 91 as shown in Fig. 4-2 and Fig. 4-3, the support guide head 91 be column construction, column
Axis hole is provided in the middle part of shape structure, the end of the axis hole is equipped with chamfering, to facilitate the spindle nose for being packed into leading screw 1.The support guide head
91 outer circle busbar is arc, to avoid support guide head 91 because by leading to its pushing away with push-rod assembly 4 after radial load
It is contacted between rod sleeve inner wall and generates friction.
In order to which the circumferential resistance for increasing support guide head 91 prevents it from being rotated with leading screw 1, the surrounding of the support guide head 91
Design is there are four notch, while the notch also has storing lubricating grease effect.When mounted, profit can be installed additional in the notch in advance
Consistent lubricant once fills, constant feast, improves the service life of equipment.
It, radially, will in order to avoid contacting with each other and rubbing between leading screw 1 and the push rod housing inner wall of push-rod assembly 4
Fit tolerance between the outer circle of the support guide head 91 and the push rod housing inner wall of push-rod assembly 4 is designed as clearance fit.This
Sample designs, even if support guide head 91 receives the effect of power radially, also only support guide head 91 and push-rod assembly 4
Push rod housing inner wall have axial relative motion, therefore can be significantly reduced in the push rod housing of leading screw 1 and push-rod assembly 4
Abrasion between wall.
In the electric cylinder course of work, leading screw 1 makees high speed rotary motion, if the support oriented device 9 due to rubbing action with
1 synchronous rotary of leading screw, then its peripheral linear speed and axial linear velocity are all very huge, therefore should avoid support guide head as possible
91 rotate in a circumferential direction with leading screw 1, to reduce the abrasion of support guide head 91 and improve efficiency.In order to avoid support guide head 91
It rotates in a circumferential direction with leading screw 1, clearance fit will be designed as between 1 spindle nose of the inner wall of support guide head 91 and screw by setting, together
When make support guide head 91 thickness be less than 1 spindle nose of leading screw length, in this way 1 spindle nose end of leading screw fix thrust washer 93
Afterwards, support guide head 91 is in the axial direction clearance fit between the shaft shoulder of leading screw 1 and thrust washer 93, that is,
It says, is not stuck between support guide head 91 is positioned over 1 shaft shoulder of thrust washer 93 and leading screw.
In order to reduce the frictional force between support guide head 91 and the push rod housing inner wall of push-rod assembly 4, support guide head
Support guide head made of the synthetic material (such as aluminium bronze) of 91 material selection copper or copper for base-material etc..
4th, buffering stop block 6
In order to limit the action position range of push-rod assembly 4, need to set the buffering stop block 6 for mechanical position limitation.
The installation site of the buffering stop block is as shown in Fig. 5-1, Fig. 5-2 and Fig. 5-3, it can be seen that in the application
Buffering stop block 6 includes：Left buffering stop block 61 and right buffering stop block 62.
Left buffering stop block 61 therein is installed on the right side of bearing front support 81, and a left side for left buffering stop block 61
End face is close to the groove body bottom of the bearing front support right side, the right side freedom of left buffering stop block 61 and opposite nut
2。
The right side of right buffering stop block 62 therein is mounted on the cylinder barrel drive end bearing bracket of 3 right end of cylinder barrel by bonding mode
7 left side；It is used freely and against the push rod flange for being arranged on 4 right end of push-rod assembly the left side of right buffering stop block 62
In being in contact in push-rod assembly 4 to the right operational process with push rod flange.
The structure of above-mentioned left buffering stop block 61 as shown in Fig. 5-4, including：First cushion pad 611 and buffer substrate tablet
612。
Wherein the first cushion pad 611 is rubber buffer, and outer ring is tapered, and middle part is provided with bellmouth, in is formationed under width
Narrow annular ring.During installation, by the relatively narrow side of the first cushion pad 611 against nut 2, wider side is propped up before being close to the bearing
Support the groove body bottom of right side.The relatively narrow side of first cushion pad 611 is provided with groove, to accommodate buffer substrate tablet 612, the buffer substrate tablet 612
Right end against nut 2.When nut 2 is moved to the left with push-rod assembly 4, first can the first cushion pad of percussion 611 it is relatively narrow
It holds, then the stress transfer being subject to is given the broad side of the first cushion pad 611 by narrow end.
In the practical course of work, when the first cushion pad 611 is impacted, the broad side stress of the first cushion pad 611
It is larger, in order to reduce the stress and strain of 611 broad side of the first cushion pad, increase its service life, the taper of bellmouth is set
The tapered direction of direction and outer ring on the contrary, can ensure that the contact area of 611 broad side of the first cushion pad is larger in this way, so as to
The stress acted on unit area is enough made to become smaller, and then the strain of first cushion pad 611 can be reduced.Meanwhile first is slow
The conical design for rushing pad 611 also allows for its manufacture, plays the role of drafting angle to a certain extent.
Above-mentioned buffer substrate tablet 612 is metal buffer piece, and material can be spring steel.Buffer substrate tablet 612 is pacified by bonding mode
In the groove of the first cushion pad 611.
Above-mentioned right buffering stop block 62 is compared with left buffering stop block 61, no longer including buffer substrate tablet 612, second is that only
Only include the second cushion pad.And second does not have to setting groove on cushion pad, remaining the characteristics of it is identical with the first cushion pad 611, this
In be not described in detail.
The right buffering stop block 62 to be installed, annular ring broad side is close to the right cylinder barrel drive end bearing bracket 7, relatively narrow side is free,
Against the push rod flange of push-rod assembly 4.When push-rod assembly 4 moves right, the push rod flange of push-rod assembly 4 first can percussion
The narrow end of two cushion pads, then narrow end by the stress transfer being subject to give the second cushion pad broad side.
5th, electric limiting device
The limiting device mainly uses the principle of magnetic field induction, and contactless electrical limit is realized to linearly operating mechanism
Position.As in Figure 6-1, which includes the structure of the limiting device：Magnetite component 11 and limit switch 12.
Magnetite component 11 is fixed in the groove of the push rod flange in the push-rod assembly 4 of straight line actuation mechanism；The groove
It is opened on the outer ring of push rod flange, the top of the groove and one end have an opening, and the opening of end is towards push rod method
Orchid has the side of bolt；And the two neighboring bolt on push rod flange is symmetrically arranged at the center line both sides of the groove.
Limit switch 12 is fixed on straight line actuation mechanism cylinder barrel barrel.The specific T-shaped sliding slot for being fixed on 3 one side of cylinder barrel
In 35.
As the push rod of straight line actuation mechanism moves in a straight line, the distance between magnetite component 11 and limit switch 12 are more next
It is smaller, when magnetite component 11 induced field reach limit switch 12 magnetic induction apart from when, triggering limit switch 12 act, limit
Bit switch 12 exports an electric signal to controller, after controller receives the electric signal, sends out corresponding specific control
It instructs that driving part (such as servo motor) is controlled to stop driving.
The structure of above-mentioned magnetite component 11 covers 11-2, magnetite pressing plate 11- as in fig. 6-2, including magnetite 11-1, magnetite
The 3 and first fastener 11-4.
Above-mentioned magnetite set 11-2 is the bucket body structure with accommodating cavity, and it is flat that the top of the bucket body structure is milled with one along longitudinal direction
Face；The accommodating cavity extends to the right the right end of bucket body structure, extends upwardly to plane.Magnetite set 11-2 is installed to pushing away
In the groove opened up on bar flange outer ring.
Magnetite 11-1 is mounted in the accommodating cavity of magnetite set 11-2, due to magnetite set 11-2 accommodation space upwards always
Extend to plane so that the top half structure of magnetite set 11-2 is unclosed, and magnetite 11-1 is covered the upper of 11-2 from magnetite in this way
Portion is just exposed out, so as to enhance magnetite magnetic field penetration, ensure that magnetic field intensity.
The right end of magnetite 11-1 is withstood by magnetite pressing plate 11-3.In order to enhance magnetite magnetic field penetration, magnetite pressing plate 11-3
The top be less than magnetite 11-1 the top.
Magnetite pressing plate 11-3 is fixed on by the first fastener 11-4 on the end face of push rod flange 2 of straight line actuation mechanism.
By the first fastener 11-4 to the squeezing action of magnetite pressing plate 11-3, magnetite 11 can be fixed and taken off not out of push rod flange
It falls.
Above-mentioned limit switch 12 is two, and a movement initial position for being arranged in push rod flange, another, which is arranged in, pushes away
The movement final position of bar flange, spacing therebetween can need to adjust according to scene.The two limit switches 12 are distinguished
By buckle on the outer surface of cylinder barrel barrel.In order to ensure the induced field between magnetite component 11 and limit switch 12
Intensity is provided with sliding slot on straight line actuation mechanism cylinder barrel barrel, and the sensing center of limit switch 12 is made to be located at the sliding slot just
Top.
In order to ensure induced field intensity, when arranging above-mentioned limit switch 12, it is located at the sensing center of limit switch 12
Sense on the center of magnetite 11-1 and the line of push rod flange center.At this moment the straight line of sensing magnetite 11-1 and limit switch 12 away from
From shorter, magnetic field intensity is stronger.
In order to enhance magnetite magnetic field penetration, the cylinder barrel barrel of the straight line actuation mechanism in the application, magnetite set 11-2 and
Magnetite pressing plate 11-3 selects un-conducted magnetic material to make, such as hard aluminium alloy；
In order to enhance magnetite magnetic field intensity, above-mentioned magnetite 11-1 selects neodymium iron boron strong magnet to make.
7th, trunnion plate 13
The structure of trunnion plate is as shown in Fig. 7-1, it can be seen that the trunnion plate 13 is slab construction and close on the inside of tablet
The position at both ends is respectively equipped with step 13-4, and the baseplane of step 13-4 is communicated with tablet end, forms two connections
Plane；The first mounting hole 13-1 is provided in one of connection plane, coordinates to pacify with the bolt hole on 10 end face of fixed plate
Fill trunnion plate fastening bolt；In order to facilitate the installation site of 13 length direction of micro-adjustment trunnion plate, first mounting hole 13-1 is set
It is set to slot hole；The second mounting hole 13-2 is provided in another connection plane, is coordinated with the bolt hole of 7 end face of cylinder barrel drive end bearing bracket
To install trunnion plate fastening bolt.Penetrating trunnion hole 13-3 is also provided on trunnion plate, for connecting trunnion.
A length of L of the step of trunnion plate, width B, depth H；The width of B=trunnion plates therein.
In the case where can be ensured that step can bear corresponding active force, the depth for making step as possible is smaller, but
The synthesis force-bearing situation of processing technology and trunnion plate is also considered simultaneously, the depth of trunnion plate step is set as H, the B/
2<H<B, preferred H=3mm.Since the depth of the step 13-4 of trunnion plate is H=3mm so that trunnion plate can pass through itself
Step directly transmits the force to fixed plate 10 and cylinder barrel drive end bearing bracket 7.
In order to which the step 13-4 for ensureing trunnion plate plays the role of bearing load in real process, in straight line actuation mechanism
Practical set in, preload compression can be carried out to cylinder barrel using supporting studs, to ensure the straight line actuation mechanism by 90kN pulling force
Or during pressure, cylinder barrel will not generate gap between cylinder barrel drive end bearing bracket 7 or fixed plate 10.For this purpose, in design trunnion plate step
When, it should be taken into account that it should ensure that certain reserve between the step 13-4 of trunnion plate and cylinder barrel drive end bearing bracket 7 or fixed plate 10
Gap, for this purpose, as shown in Fig. 7-4, the value for designing the length L between two step 13-4 of trunnion plate should be in theoretical length value
L0 (theoretical length value be install after other structures such as cylinder barrel 3, cylinder barrel drive end bearing bracket 7, bearing front support 81 and fixed plate 10 and
In the case of trunnion plate is not installed, between the two step 13-4 of trunnion plate to fit just with cylinder barrel drive end bearing bracket 7 and fixed plate 10
Ideal length) on the basis of subtract cylinder barrel pre-tighten decrement S, the preferably S=0.2mm.It is embodied in：
If the distance between the step 13-4 at trunnion plate both ends is L, then the L meets following relationship：
L=L0-S
Wherein, L0 is theoretical length value, and the L0=L1+L2, wherein L1 represent that step is to rear end Nei Tai in the front end of cylinder barrel 3
The distance between rank, L2 represent cylinder barrel 3 rear end in step between 10 phase-contact surface of bearing rear support 82 and fixed plate away from
From；S pre-tightens decrement for cylinder barrel.
For the installation site of the trunnion plate of the application as shown in Fig. 7-2, Fig. 7-3 and Fig. 7-4, trunnion plate 13 therein is two
Block, one of trunnion plate 13 pass through four fixed spiral shells perpendicular to above-mentioned cylinder barrel drive end bearing bracket 7 and the front end face of fixed plate 10
Nail is fixed；Another piece of trunnion plate 13 passes through four fixed spiral shells perpendicular to above-mentioned cylinder barrel drive end bearing bracket 7 and the rear end face of fixed plate 10
Nail is fixed.
After trunnion plate it can be seen from Fig. 7-2, Fig. 7-3 and Fig. 7-4 13 is installed, the step side of trunnion plate 13 and fixation
There are gap S for meeting between the medial surface (against the one side of cylinder barrel 3) of plate 10.The depth H of step ensure that trunnion plate can pass through
Itself step directly transmits the force to fixed plate 10 and cylinder barrel drive end bearing bracket 7.
By the step design of trunnion plate, the maximum of each critical component in device on the one hand can be significantly reduced
Stress value, on the other hand also make each critical component bearing distribution more rationally with uniformly.
8th, the spring bearing group 8 of 1 left end of leading screw
In the straight line actuation mechanism course of work, one side leading screw 1 wants high speed rotation, on the other hand to bear axial load
And Radial Loads, so selecting suitable spring bearing group to the service life of leading screw 1 and the reliability of work to closing weight
It will.Since the spring bearing group 8 of the utility model has selected the angular contact bearing that two groups of back-to-back modes install, on the one hand can
Ensure that leading screw being capable of flexible rotating；On the other hand the radially, axially supporting role to leading screw is played.
9th, sealing structure
To prevent lubricating grease leakage and external dust in cylinder barrel from polluteing inside electric cylinder, the design is revealed for possible
Seal Design is carried out with the position of pollution, which not only considers the static sealing of structure, further to dynamic
Sealing position is designed.It is specifically shown in the following table 1.
1 Seal Design of table
Although the utility model has been described by way of example and in terms of the preferred embodiments, embodiment does not limit the utility model.Not
It is detached from the spirit and scope of the utility model, any equivalence changes done or retouching, also belongs to the guarantor of the utility model
Protect range.Therefore the scope of protection of the utility model should be using the content that claims hereof is defined as standard.
Claims (10)
1. a kind of straight line actuation mechanism with cramped construction, which is characterized in that the straight line with cramped construction makees motivation
Structure includes：
Leading screw (1)；Nut (2)；Cylinder barrel (3)；Push-rod assembly (4)；Anti-rotational guider (5)；Buffering stop block (6)；Cylinder
Cylinder drive end bearing bracket (7)；Spring bearing group (8)；Bearing front support (81)；Bearing rear support (82)；Support oriented device (9)；It is fixed
Plate (10)；Limit switch (12)；Trunnion plate (13) and power unit (15)；
The cylinder barrel (3) is fixed between cylinder barrel drive end bearing bracket (7) and bearing rear support (82)；Bearing rear support (82) and power list
The motor of first (15) is parallel to be fixed in fixed plate (10)；
The left end of leading screw (1) is propped up by the spring bearing group (8) being installed between bearing front support (81) and bearing rear support (82)
Support；The right end of leading screw (1) is equipped with support oriented device (9), and puts in inside the push rod housing of push-rod assembly (4)；The push rod
Component (4) left end connects with the nut (2) on leading screw (1)；Push-rod assembly (4) right end is by being installed in cylinder barrel drive end bearing bracket (7)
Push rod guide sleeve does guide support, and stretches out cylinder barrel drive end bearing bracket (7)；The operating of leading screw (1) provides power by power unit (15)；
Sliding slot (31) is provided on the cylinder barrel (3)；Anti-rotational guider (5) on the nut (2) partly stretches into
In the sliding slot (31) of cylinder barrel (3)；
The trunnion plate (13) is fixed on front side and the rear side of fixed plate (10) and cylinder barrel drive end bearing bracket (7)；
Limit switches (12) are installed, to limit the running position of push-rod assembly (4) on the cylinder barrel (3).
2. a kind of straight line actuation mechanism with cramped construction according to claim 1, which is characterized in that
Nut (2) two side ends are symmetrically provided with plane (21)；
The anti-rotational guider (5) is two, and each anti-rotational guider (5) is fixed on the nut (2) on one side
In the plane (21) of side, another side is stretched into the sliding slot (31) of the cylinder barrel (3), and can be done along the sliding slot (31) directly
Line moves.
3. a kind of straight line actuation mechanism with cramped construction according to claim 2, which is characterized in that described anti-rotational
Guider (5) includes：
Feather key (51), feather key set (52) and feather key screw (53)；
The feather key (51) is fixed on by single feather key screw (53) in the plane (21) of nut (2) side；
The feather key set (52) is installed on the outside of feather key (51), and the feather key (51) is wrapped；The feather key set
(52) it stretches into the sliding slot (31) of the cylinder barrel (3), and coordinates with the sliding slot (31), can be done along the sliding slot (31) directly
Line moves.
4. a kind of straight line actuation mechanism with cramped construction according to claim 1, which is characterized in that
The straight line actuation mechanism with cramped construction further includes：Magnetite component (11)；
The push-rod assembly (4) includes push rod flange；Open up groove on the outer ring of the push rod flange, the top of the groove with
And one end has opening, the opening of end has the side of bolt towards push rod flange；And the two neighboring spiral shell on push rod flange
Bolt is symmetrically arranged at the center line both sides of the groove；The magnetite component (11) is fixed on the push-rod assembly (4)
In the groove of push rod flange；
T-shaped sliding slot (35) is provided on cylinder barrel (3) barrel, the limit switch (12) is two, mounted on the T-shaped cunning
In slot (35), and the front and rear electric limiting position of push rod flange is corresponded to respectively；
The magnetite component (11) is driven by the push-rod assembly (4) and runs, when the limit switch (12) is positioned at the magnetite
During the induced field of component (11), limit switch (12) action.
A kind of 5. straight line actuation mechanism with cramped construction according to claim 4, which is characterized in that the magnetite group
Part includes：
Magnetite (11-1), magnetite set (11-2), magnetite pressing plate (11-3) and the first fastener (11-4)；
The magnetite set (11-2) is the bucket body structure with accommodating cavity, and it is flat that the top of the bucket body structure is milled with one along longitudinal direction
Face；The accommodating cavity extends to the right the right end of bucket body structure, extends upwardly to plane；The magnetite set (11-2) is installed extremely
In the groove opened up on the push rod flange outer ring of straight line actuation mechanism；
The magnetite (11-1) is in the accommodating cavity of magnetite set (11-2)；
The right end of the magnetite (11-1) is withstood by magnetite pressing plate (11-3)；
The magnetite pressing plate (11-3) is fixed on the end face of the push rod flange of straight line actuation mechanism by the first fastener (11-4)
On.
6. a kind of straight line actuation mechanism with cramped construction according to claim 5, which is characterized in that the limiting is opened
The sensing center for closing (12) is located on the center of magnetite (11-1) and the line of push rod flange center.
A kind of 7. straight line actuation mechanism with cramped construction according to claim 4, which is characterized in that the buffering limit
Position device (6) includes：
Left buffering stop block (61) and right buffering stop block (62)；
The left side of the left buffering stop block (61) is close to the groove body bottom of bearing front support (81) right side, left buffering limit
The right side freedom of position device (61) and opposite nut (2)；
The right side of the right buffering stop block (62) is mounted on the left side of the cylinder barrel drive end bearing bracket (7) by bonding mode
Face；The left side freedom of right buffering stop block (62) and the opposite push rod flange for being arranged on push-rod assembly (4) right end.
A kind of 8. straight line actuation mechanism with cramped construction according to claim 7, which is characterized in that the left buffering
Limiting device (61) includes：
First cushion pad (611) and buffer substrate tablet (612)；
The outer ring of first cushion pad (611) is tapered, and middle part is provided with bellmouth, forms annular ring wide at the top and narrow at the bottom；Wherein
Annular ring broad side is close to the groove body bottom of bearing front support (81) right side；The wherein relatively narrow side of annular ring is provided with groove, institute
Buffer substrate tablet (612) is stated as metal buffer piece, is mounted on by bonding mode in the groove of the first cushion pad (611), the buffer substrate tablet
(612) right end is against nut (2).
9. a kind of straight line actuation mechanism with cramped construction according to claim 1, which is characterized in that the support is led
Include to device (9)：
Support guide head (91), fastener (92) and thrust washer (93)；
The support guide head (91) is on the spindle nose of the leading screw (1), and in the spindle nose end fastener of leading screw (1)
(92) fixed thrust washer (93)；
The support guide head (91) radially, is matched between the push rod housing inner wall of outer circle and push-rod assembly (4) for gap
It closes, matching between inner wall and leading screw (1) spindle nose is combined into clearance fit；
The support guide head (91) in the axial direction, between being between the shaft shoulder of leading screw (1) and thrust washer (93)
Gap coordinates.
10. a kind of straight line actuation mechanism with cramped construction according to claim 1, which is characterized in that
The trunnion plate (13) is slab construction, and inside is respectively equipped with step (13-4), and this close to the position at both ends
The baseplane of rank (13-4) is communicated with the end of the slab construction, forms two connection planes；In one of connection plane
The first mounting hole (13-1) is provided with, coordinates trunnion plate fastening bolt is installed with the bolt hole on fixed plate (10) end face；Separately
The second mounting hole (13-2) is provided in outer connection plane, coordinates to install with the bolt hole of cylinder barrel drive end bearing bracket (7) end face
Trunnion plate fastening bolt；Trunnion hole (13-3) is provided in the trunnion harden structure, for connecting trunnion；
The depth of the step (13-4) is set as H, and the H meets：B/2<H<B, wherein B are the thickness of trunnion plate；
If the distance between the step (13-4) at trunnion plate both ends is L, then the L meets following relationship：
L=L0-S；
Wherein, L0 is theoretical length value, and the L0=L1+L2, wherein L1 are represented in the front end face to rear end of cylinder barrel (3) between step
Distance, L2 represent cylinder barrel (3) rear end in step between bearing rear support (82) and fixed plate (10) phase-contact surface away from
From；S pre-tightens decrement for cylinder barrel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721292467.3U CN207470717U (en) | 2017-10-09 | 2017-10-09 | A kind of straight line actuation mechanism with cramped construction |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721292467.3U CN207470717U (en) | 2017-10-09 | 2017-10-09 | A kind of straight line actuation mechanism with cramped construction |
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| CN207470717U true CN207470717U (en) | 2018-06-08 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107588168A (en) * | 2017-10-09 | 2018-01-16 | 中国船舶重工集团公司第七0四研究所 | A kind of straight line actuation mechanism with cramped construction |
| CN108832765A (en) * | 2018-07-09 | 2018-11-16 | 董道明 | A kind of water-proof electric push rod |
| CN111559718A (en) * | 2020-05-22 | 2020-08-21 | 中国船舶重工集团公司第七0四研究所 | Large-stroke electric erecting device |
| CN112117522A (en) * | 2020-08-20 | 2020-12-22 | 北京特种机械研究所 | Large-tonnage servo-feed erecting electric mechanism |
| CN112982912A (en) * | 2021-03-02 | 2021-06-18 | 广东博智林机器人有限公司 | Electric cylinder and wall brick paving and pasting robot |
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2017
- 2017-10-09 CN CN201721292467.3U patent/CN207470717U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107588168A (en) * | 2017-10-09 | 2018-01-16 | 中国船舶重工集团公司第七0四研究所 | A kind of straight line actuation mechanism with cramped construction |
| CN107588168B (en) * | 2017-10-09 | 2020-09-04 | 中国船舶重工集团公司第七0四研究所 | Linear actuating mechanism with compact structure |
| CN108832765A (en) * | 2018-07-09 | 2018-11-16 | 董道明 | A kind of water-proof electric push rod |
| CN111559718A (en) * | 2020-05-22 | 2020-08-21 | 中国船舶重工集团公司第七0四研究所 | Large-stroke electric erecting device |
| CN112117522A (en) * | 2020-08-20 | 2020-12-22 | 北京特种机械研究所 | Large-tonnage servo-feed erecting electric mechanism |
| CN112117522B (en) * | 2020-08-20 | 2024-06-04 | 北京特种机械研究所 | Large-tonnage servo lifting electric mechanism |
| CN112982912A (en) * | 2021-03-02 | 2021-06-18 | 广东博智林机器人有限公司 | Electric cylinder and wall brick paving and pasting robot |
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