CN203416145U - Miniature linear execution system with self-locking and blocking resistant function - Google Patents
Miniature linear execution system with self-locking and blocking resistant function Download PDFInfo
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- CN203416145U CN203416145U CN201320491878.0U CN201320491878U CN203416145U CN 203416145 U CN203416145 U CN 203416145U CN 201320491878 U CN201320491878 U CN 201320491878U CN 203416145 U CN203416145 U CN 203416145U
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- bearing
- square nut
- self
- locking
- drive block
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Abstract
The utility model discloses a miniature linear execution system with a self-locking and blocking resistant function. The miniature linear execution system with the self-locking and blocking resistant function comprises a driving block, a stepping motor, a square nut, a motor fixing plate and at least one guide post; the guide post and the stepping motor are integrally connected on the motor fixing plate; the square nut is sheathed on a screw shaft of the stepping motor; the square nut which is limited in the radial direction rotates around the driving block and slide with the driving block along the guide post. In particular, the square nut is coaxially fixed with an inner ring of a bearing; the bearing is embedded into the driving block and two sides of the outer ring of the bearing contacts and moves with the driving block; and the bearing is used to transform static friction into rolling friction. The miniature linear execution system of the utility model increases the output power of the system, greatly reduces the blocking probability of the system, and improves the production efficiency and yield rate; and at the same time, the system test time, and the manpower, and the cost production are also reduced.
Description
Technical field
The utility model relates to a kind of executive system, relates in particular to a kind of micro linear executive system.
Background technology
Linear executive system can be used for driver part and move by linear mode, and can to the particular location of motion, position by mechanical position limitation or position transducer, is the device often using in industrial automation.
The straight linear executive system of prior art comprises straight linear actuator and linear electric motors, straight linear actuator adopts slide rail and slide block combination restriction motor to do rectilinear motion along slide rail direction, the slide rail that actuator adopts and slide block assembly are comparatively huge, take up room extremely many, and mechanism is more loaded down with trivial details, be not easy to install, actuator only plays single slide rail direction restriction to motor, so be equipped with motor, must be equipped with special linear electric motors, special linear electric motors price is high, required cost is high, is unfavorable for social development.
Therefore existing research and development micro linear executive system as shown in Figure 1 and Figure 2, this micro linear executive system comprises drive block 1, stepping motor 2, square nut 3, motor fixing plate 4 and two lead 5, and drive block 1 is provided with lead hole, driver slot 11 and motor shaft passage 12; Lead 5 one end cunnings wear and are connected in lead hole, and lead 5 is mainly used in limiting drive block 1 displacement rails, and the lead other end and motor fixing plate are connected and fixed; Stepping motor and motor fixing plate are connected and fixed, motor is provided with the fixing hole (omission Reference numeral) that is diagonal angle, this fixing hole by with motor fixing plate on corresponding aperture be connected and fixed, the motor shaft 21 of stepping motor is screw shaft, this screw shaft is inserted in motor shaft passage 12; Square nut 3 is bolted on screw shaft, and square nut 3 is placed in driver slot 11 and spacing, and driver slot 11 does not rotate by restriction square nut, indirectly defines this system linearity motion simultaneously.In addition, above-mentioned two leads are divided into the both sides of motor shaft, and drive block correspondence is provided with two lead holes, have guaranteed the stable operation of this system.The relative motor shaft Central Symmetry of above-mentioned two leads, further guarantees that the linear track of this micro linear executive system motion is stable.
But there is self-locking stuck phenomenon in this system two ends extreme position in motion process.Analyzing main cause is due to wherein copper square nut, to cause because extruding generation stiction is excessive self-locking with drive block.
Summary of the invention
In view of the defect that above-mentioned prior art exists, the purpose of this utility model is to propose a kind of micro linear executive system with the stuck function of anti-self-locking, solves such executive system of tradition in the stuck problem of two ends extreme position self-locking.
Above-mentioned purpose of the present utility model, the technical solution of its realization is: a kind of micro linear executive system with the stuck function of anti-self-locking, by drive block, stepping motor, square nut, motor fixing plate and at least one lead form, described lead is connected on motor fixing plate with stepping motor one mutually, described square nut is socketed on the screw shaft of stepping motor, described square nut radially limits and rotates in drive block and along lead, slide in the lump with drive block, it is characterized in that: the inner ring of the coaxial affixed bearing of described square nut, described bearing is embedded in drive block and the both sides, outer ring of bearing contact with drive block, servo-actuated, described screw shaft is unsettled to be stretched in the inner ring inner side of bearing.
Further, described bearing is one of deep groove ball bearing, thrust ball bearing, cylinder roller bearing or needle bearing.
Further, described micro linear executive system has two leads, and drive block is provided with two corresponding lead holes.
Apply micro linear executive system of the present utility model, the remarkable advantage that compares to conventional art is: it has increased the power output of this system, and the stuck probability of the system that greatly reduces, has improved production efficiency and yield; Can also reduce system test time and manpower, production cost simultaneously.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing micro linear executive system motor part.
Fig. 2 is the cut-open view of final assembly of existing micro linear executive system.
Fig. 3 is the structural representation of the utility model micro linear executive system motor part.
Fig. 4 is the cut-open view of final assembly of the utility model micro linear executive system.
Embodiment
Traditional micro linear executive system as shown in Figure 1 and Figure 2, volume is small and rotarily drive drive block moving linearly by motor shaft, has solved the linear executive system volume of prior art cathetus greatly and the high problem of institute's outfit linear electric motors price.But this system is prone to the stuck problem of self-locking at two ends extreme position as previously mentioned, so stiction for producing between square nut and drive block in the traditional micro linear executive system of minimizing, under the prerequisite that reduces production cost, copper square nut structure is optimized, reduce its contact area and stiction, improve self-locking stuck phenomenon, reduce energy loss, promote the operating efficiency of linear executive system.
As shown in Figure 3 and Figure 4, be motor part-structure schematic diagram and the cut-open view of final assembly that the utlity model has the micro linear executive system of the stuck function of anti-self-locking.From illustrating, on the basis of traditional micro linear executive system, characteristic Design of the present utility model is eliminated or is transformed mainly for the stiction between square nut and drive block, and this confficient of static friction is converted into coefficient of rolling friction, avoids thus self-locking stuck phenomenon.And from implementation structure: the inner ring of these square nut 3 coaxial affixed bearings 6, driver slot 11 both sides, outer ring interior and bearing 6 that this bearing 6 is embedded at drive block contact with drive block 1, this bearing 6 is axially synchronized with the movement with square nut 3, and drives drive block 1 servo-actuated together.In this, screw shaft is unsettled to be stretched in the inner ring inner side of bearing 6, and bearing inner race does not contact with screw shaft.
Above-mentioned bearing is one of deep groove ball bearing, thrust ball bearing, cylinder roller bearing or needle bearing, the frictional force that only need meet between bearing and drive block reduces, stepping motor reduces in the power perpendicular in screw shaft direction, in the power being parallel in screw shaft direction, increase, the stepping motor power output of whole micro linear executive system is increased.
In addition, in technical solutions of the utility model, aforementioned conventional stepping motor can be reaction equation, magneto, hybrid or single-phase type is all applicable.As long as can relatively accurately control by step angle the anglec of rotation of motor.According to the demand of miniature applications, select the external diameter size of stepping motor, one of preferred is the magneto micro-step motor of external diameter 15mm.
During concrete enforcement, operate this micro linear executive system, stepping motor participation work, because square nut is limited and do not rotate, so rotate by screw shaft, make square nut generation linear displacement, and the coaxial inner ring of an affixed bearing of square nut and the outer ring of bearing and movable block are halved together, and drive thus drive block to move linearly along lead.Like this, just by the outer ring of bearing and contacting of movable block, the confficient of static friction of former square nut and drive block is converted to the coefficient of friction of bearing self ball, and then reaches contact area and the confficient of static friction that reduces itself and drive block part, thoroughly avoid self-locking stuck.
By above-mentioned character express, can find out, apply micro linear executive system of the present utility model, compare to conventional art and have remarkable advantage and progressive: it has increased the power output of this system, the stuck probability of the system that greatly reduces, has improved production efficiency and yield; Can also reduce system test time and manpower, production cost simultaneously.
In addition to the implementation, the utility model can also have other execution mode, and all employings are equal to the technical scheme of replacement or equivalent transformation formation, within all dropping on the utility model scope required for protection.
Claims (3)
1. a micro linear executive system with the stuck function of anti-self-locking, by drive block, stepping motor, square nut, motor fixing plate and at least one lead form, described lead is connected on motor fixing plate with stepping motor one mutually, described square nut is screwed onto on the screw shaft of stepping motor, described square nut radially limits and rotates in drive block and along lead, slide in the lump with drive block, it is characterized in that: the inner ring of the coaxial affixed bearing of described square nut, described bearing is embedded in drive block and the both sides, outer ring of bearing contact with drive block, servo-actuated, described screw shaft is unsettled to be stretched in the inner ring inner side of bearing.
2. the micro linear executive system according to claim 1 with the stuck function of anti-self-locking, is characterized in that: described bearing is one of deep groove ball bearing, thrust ball bearing, cylinder roller bearing or needle bearing.
3. the micro linear executive system according to claim 1 with the stuck function of anti-self-locking, is characterized in that: described micro linear executive system has two leads, and drive block is provided with two corresponding lead holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320491878.0U CN203416145U (en) | 2013-08-13 | 2013-08-13 | Miniature linear execution system with self-locking and blocking resistant function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320491878.0U CN203416145U (en) | 2013-08-13 | 2013-08-13 | Miniature linear execution system with self-locking and blocking resistant function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203416145U true CN203416145U (en) | 2014-01-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320491878.0U Expired - Fee Related CN203416145U (en) | 2013-08-13 | 2013-08-13 | Miniature linear execution system with self-locking and blocking resistant function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203416145U (en) |
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2013
- 2013-08-13 CN CN201320491878.0U patent/CN203416145U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140129 Termination date: 20190813 |