DE29521602U1 - Electric push-pull spindle drive - Google Patents
Electric push-pull spindle driveInfo
- Publication number
- DE29521602U1 DE29521602U1 DE29521602U DE29521602U DE29521602U1 DE 29521602 U1 DE29521602 U1 DE 29521602U1 DE 29521602 U DE29521602 U DE 29521602U DE 29521602 U DE29521602 U DE 29521602U DE 29521602 U1 DE29521602 U1 DE 29521602U1
- Authority
- DE
- Germany
- Prior art keywords
- spindle
- nut
- push
- pull
- spindle drive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000013016 damping Methods 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/06—Means for converting reciprocating motion into rotary motion or vice versa
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/0032—Arrangements for preventing or isolating vibrations in parts of the machine
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
- B23Q5/22—Feeding members carrying tools or work
- B23Q5/34—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission
- B23Q5/38—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission feeding continuously
- B23Q5/40—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission feeding continuously by feed shaft, e.g. lead screw
- B23Q5/408—Nut bearings therefor
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F15/00—Power-operated mechanisms for wings
- E05F15/60—Power-operated mechanisms for wings using electrical actuators
- E05F15/603—Power-operated mechanisms for wings using electrical actuators using rotary electromotors
- E05F15/611—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for swinging wings
- E05F15/616—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for swinging wings operated by push-pull mechanisms
- E05F15/622—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for swinging wings operated by push-pull mechanisms using screw-and-nut mechanisms
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/2021—Screw mechanisms with means for avoiding overloading
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
- E05Y2900/00—Application of doors, windows, wings or fittings thereof
- E05Y2900/10—Application of doors, windows, wings or fittings thereof for buildings or parts thereof
- E05Y2900/13—Type of wing
- E05Y2900/148—Windows
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
- E05Y2999/00—Subject-matter not otherwise provided for in this subclass
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H2025/2062—Arrangements for driving the actuator
- F16H2025/2075—Coaxial drive motors
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Switches With Compound Operations (AREA)
- Spinning Or Twisting Of Yarns (AREA)
- Portable Nailing Machines And Staplers (AREA)
Description
Die Erfindung betrifft einen elektrischen Schub-Zug-Spindelantrieb nach dem Oberbegriff des Anspruchs 1.The invention relates to an electric push-pull spindle drive according to the preamble of claim 1.
In einem bekannten Spindelantrieb dieser Art (DE 43 22 133 Al) kann eine rohrförmige Schubstange in Abhängigkeit von der Drehbewegung einer Spindel in Längsrichtung verschoben werden. Die rohrförmige Schubstange ist mit einem linearbeweglichen Dämpferkäfig verbunden. Im Dämpferkäfig ist eine Spindelmutter zwischen Federpaketen gelagert, die durch ihren Anpreßdruck verhindern sollen, daß sich die Spindelmutter mit der Drehung der Spindel mitdreht. Die lediglich kraftschlüssige Verbindung zwischen Spindelmutter und Dämpferkäfig ist unzureichend, wenn größere Kräfte auf die Schubstange einwirken, weil dann die Spindelmutter nicht ausreichend festgehalten wird. Statt der beschriebenen reibschlüssigen Verbindung ist als Alternative noch eine feste Verbindung zwischen Dämpferkäfig und Spindelmutter vorgesehen, und zwar mit Hilfe eines als Ringpuffer be-In a known spindle drive of this type (DE 43 22 133 Al), a tubular push rod can be moved longitudinally depending on the rotational movement of a spindle. The tubular push rod is connected to a linearly movable damper cage. In the damper cage, a spindle nut is mounted between spring assemblies, which are intended to prevent the spindle nut from rotating with the rotation of the spindle through their contact pressure. The purely force-fit connection between the spindle nut and the damper cage is inadequate if greater forces act on the push rod, because then the spindle nut is not held sufficiently. Instead of the friction-fit connection described, an alternative is a fixed connection between the damper cage and the spindle nut, using a ring buffer.
18 331 .·. "&zgr; * \.!V.: ' *.'/' : 18.08.199718 331 .·. "&zgr; * \. ! V. : '*.'/' : 18.08.1997
zeichneten elastischen Rings, der die Spindelmutter umschließt und außenseitig fest an der Käfigwand anliegt. Bei dieser alternativen Ausführungsform muß der Ringpuffer sämtliche Relativbewegungen zwischen Spindelmutter und Dämpferkäfig aufnehmen. Zur Erzeugung einer ausreichenden Dämpfungskapazität muß der Ringpuffer vergleichsweise großvolumig ausgebildet werden mit der Folge, daß dann der gesamte Stellantrieb vergleichsweise groß bauen muß.elastic ring that surrounds the spindle nut and rests firmly against the outside of the cage wall. In this alternative design, the ring buffer must absorb all relative movements between the spindle nut and the damper cage. To generate sufficient damping capacity, the ring buffer must be designed to be relatively large, with the result that the entire actuator must be relatively large.
Es ist weiterhin ein Schubstangenantrieb der gattungsgemäßen Art bekannt (DE 35 10 445 Al), der in jeder Schub-Zug-Stellung der Schubstange eine wirksame Dämpfung der auf die Schubstange wirkenden Kräfte sicherstellt. Das motorseitige Ende der Spindel ist hierzu zwischen zwei Federpaketen gelagert, während die mit der Schubstange verbundene Spindelmutter im Gehäuse längsverschieblich geführt ist.A push rod drive of the generic type is also known (DE 35 10 445 Al), which ensures effective damping of the forces acting on the push rod in every push-pull position of the push rod. The motor-side end of the spindle is mounted between two spring assemblies, while the spindle nut connected to the push rod is guided longitudinally in the housing.
Es ist ferner ein linearer Kraftantrieb bekannt (DE 30 44 645), bei dem ein Antriebsmotor als separate Bauteil stirnseitig an ein Spindelgehäuse angeflanscht ist. Eine derartige Konstruktion ist aufwendig und erfordert erheblichen Einbauraum, der nicht in jedem Fall zur Verfügung steht.A linear power drive is also known (DE 30 44 645) in which a drive motor is flanged to the front of a spindle housing as a separate component. Such a construction is complex and requires considerable installation space, which is not always available.
Schließlich ist weiterhin noch eine elektrisch angetriebene lineare Betätigungseinrichtung bekannt (DE 41 04 759 Al), die einen in einem Gehäuse angeordneten Elektromotor aufweist. Der Elektromotor weist eine zylinderförmige Rotoreinheit auf, die mit einer Schraubenspindel verbunden ist und diese umgibt. Bei dieser bekannten Lösung fehlt jegliche Dämpfungseinrichtung. Außerdem ist die bekannte Einheit, deren stirnseitige Gehäuseplatten über Zuganker zusammengespannt werden, platzaufwendig.Finally, an electrically driven linear actuation device is also known (DE 41 04 759 Al), which has an electric motor arranged in a housing. The electric motor has a cylindrical rotor unit which is connected to and surrounds a screw spindle. This known solution lacks any damping device. In addition, the known unit, whose front housing plates are clamped together via tie rods, takes up a lot of space.
18 331 .:. .♦* ·..*"..' ..* I 18.08.199718 331 .:. .♦* ·..*"..' ..* I 18.08.1997
3 -3 -
Ausgehend von dem eingangs erwähnten Stand der Technik liegt der Erfindung die Aufgabe zurunde, dessen Nachteile zu vermeiden und eine Lösung zu schaffen, mit der bei kleiner Baugröße eine sichere Umsetzung der Spindelrotation in eine Translationsbewegung der Schubstange auch bei hohen Kräften möglich ist.Based on the state of the art mentioned at the beginning, the object of the invention is to avoid its disadvantages and to create a solution with which a reliable conversion of the spindle rotation into a translational movement of the push rod is possible even with high forces, even with a small installation size.
Die Lösung dieser Aufgabe erfolgt mit den Merkmalen des Kennzeichnungsteils von Anspruch 1.This problem is solved with the features of the characterizing part of claim 1.
Bevorzugte Ausgestaltungen sind in den Unteransprüchen beschrieben. Preferred embodiments are described in the subclaims.
Nachstehend wird ein Ausführungsbeispiel mit verschiedenen Ausgestaltungsmöglichkeiten anhand der Zeichnungen erläutert. Es zeigen:An example of an embodiment with various design options is explained below using the drawings. They show:
Figur 1 - eine vereinfachte Darstellung eines elastischen Schub-Zug-Spindelantriebs,Figure 1 - a simplified representation of an elastic push-pull spindle drive,
Figur 2 - einen Längsschnitt duch die neue Mutteranordnung, FigurenFigure 2 - a longitudinal section through the new nut arrangement, Figures
3a - 3d - verschiedene Querschnittbilder längs der Schnittlinie A-B in Figur 2.3a - 3d - different cross-sectional images along the section line A-B in Figure 2.
Der Schub-Zug-Spindelantrieb . (Fig. 1) besteht aus einem über seine gesamte Länge zylindrischen Gehäuse 1 mit geringem Durchmesser, in dem an seinem einen Ende ein elektrischer Antriebsmotor 2 angeordnet ist, der mit einem Motorstützring 4 fest mit dem Gehäuse 1 verbunden ist. Die Motorwelle ist über eine Kupplung 6 an eine Spindel 8 angeschlossen, die mit einem Kugellager 10 in einem Lagerstützring 12 in Längsrichtung unverschieblich gelagert ist. DerThe push-pull spindle drive (Fig. 1) consists of a housing 1 that is cylindrical over its entire length and has a small diameter, in which an electric drive motor 2 is arranged at one end, which is firmly connected to the housing 1 by a motor support ring 4. The motor shaft is connected via a coupling 6 to a spindle 8, which is mounted immovably in the longitudinal direction by a ball bearing 10 in a bearing support ring 12. The
18 331 .:. &Igr;&Igr;!"·..·:.·:" »: I 18.08.199718 331 .:. &Igr;&Igr; ! "·..· : .· : " » : I 18.08.1997
Lagerstützring 12 ist ebenfalls am Gehäuse 1 befestigt. Die Spindel erstreckt sich bis an das abtriebsseitige Ende des Gehäuses 1, das durch eine Kopfverschraubung 14 abgeschlossen ist, in der ein Schubrohr 16 verschieblich gelagert ist, dessen Innendurchmesser ein Aufschieben auf die Spindel 8 mit ausreichendem Spiel gestattet. Das Schubrohr 16 ist mit einer Mutteranordnung 18 fest verbunden, die auf der Spindel 8 geführt ist und durch die Rotation eine Längsverschiebung des Schubrohrs 16 veranlaßt.Bearing support ring 12 is also attached to the housing 1. The spindle extends to the output-side end of the housing 1, which is closed by a head screw connection 14 in which a push tube 16 is slidably mounted, the inner diameter of which allows it to be pushed onto the spindle 8 with sufficient play. The push tube 16 is firmly connected to a nut arrangement 18, which is guided on the spindle 8 and causes a longitudinal displacement of the push tube 16 through rotation.
Die in Figur 2 dargestellter Mutteranordnung 18 zeigt eine Spindel 8, die beispielsweise in ihrer oberen Hälfte als Trapezspindel 19 und in ihrer unteren Hälfte als Kugelgewindespindel 20 ausgebildet ist. Im folgenden soll nur noch die Bezeichnung "Spindel" verwendet werden.The nut arrangement 18 shown in Figure 2 shows a spindle 8 which is designed, for example, in its upper half as a trapezoidal spindle 19 and in its lower half as a ball screw spindle 20. In the following, only the term "spindle" will be used.
Die Spindelmutter 22 ist zwischen zwei Federpaketen, hier in Form von Tellerfedern 24, angeordnet, die auf die Spindel 8 aufgeschoben sind. Die Spindelmutter 22 ist mit den Tellerfedern 24 in die Nabe 26 eingepaßt, die in ihrem mittleren Bereich die an die Länge der Spindelmutter 22 angepaßte Gegenelemente aufweist.The spindle nut 22 is arranged between two spring packages, here in the form of disc springs 24, which are pushed onto the spindle 8. The spindle nut 22 is fitted with the disc springs 24 into the hub 26, which has counter elements in its middle area adapted to the length of the spindle nut 22.
Die motorseitige Stirnfläche der Mutteranordnung 18 ist mit einem Mutterdeckel 28 verschlossen, der aufschraubbar ist. In identischer Weise ist auch das abtriebsseitige Ende der Mutteranordnung durch einen auf die Nabe 26 aufschraubbaren Schubrohrflansch 30 abgeschlossen, der mit einem Gewinde auf das Ende des Schubrohrs 16 aufgeschraubt ist. Die aufschraubbaren Deckel der Mutteranordnung ermöglichen es, die jeweils erforderliche Federvorspannung durch die Anzahl derThe motor-side face of the nut assembly 18 is closed with a nut cover 28 that can be screwed on. In an identical manner, the output-side end of the nut assembly is closed by a push tube flange 30 that can be screwed onto the hub 26 and is screwed onto the end of the push tube 16 with a thread. The screw-on covers of the nut assembly make it possible to adjust the required spring preload by the number of
I If »» · 4IIf »» · 4
18 331 «« ..* '.."..' ·«* ' 18.08.199718 331 «« ..* '.."..' ·«* ' 18.08.1997
eingesetzten Tellerfedern zu wählen; zusätzlich werden hierdurch die Montagearbeiten erleichtert. Die Mantelfläche der Nabe ist mit einer Ringnut versehen, in die ein Führungsband 32, z.B. Kohleband, eingelegt ist.used disc springs; this also makes assembly work easier. The outer surface of the hub is provided with an annular groove into which a guide strip 32, e.g. carbon strip, is inserted.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE29521602U DE29521602U1 (en) | 1995-06-03 | 1995-06-03 | Electric push-pull spindle drive |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19519948A DE19519948A1 (en) | 1995-06-03 | 1995-06-03 | Electrical reciprocal-action push-pull spindle drive |
| DE29521602U DE29521602U1 (en) | 1995-06-03 | 1995-06-03 | Electric push-pull spindle drive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE29521602U1 true DE29521602U1 (en) | 1997-10-16 |
Family
ID=26015633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE29521602U Expired - Lifetime DE29521602U1 (en) | 1995-06-03 | 1995-06-03 | Electric push-pull spindle drive |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE29521602U1 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19836683A1 (en) * | 1998-08-13 | 2000-02-17 | Schaeffler Waelzlager Ohg | Screw drive unit for electric actuators in automobiles comprises an intermediate glide layer which is attached to the carrier element and is directly in contact with the threaded spindle profile |
| DE20302137U1 (en) | 2002-09-16 | 2003-04-24 | Dewert Antriebs- und Systemtechnik GmbH & Co KG, 32278 Kirchlengern | Electric motor furniture driver has drive motor and spindle connected in a rail section housing |
| DE10209510A1 (en) * | 2002-03-05 | 2003-09-18 | Siemens Ag | Servo drive, e.g. for use in door locks in motor vehicles, has electric motor in holder driving threaded spindle that longitudinally moves rod with internal thread in guide |
| DE102004058935A1 (en) * | 2004-12-07 | 2006-06-08 | Bosch Rexroth Ag | Electrically driven linear actuator |
| WO2007087877A1 (en) * | 2006-01-20 | 2007-08-09 | Sommer Antriebs- Und Funktechnik Gmbh | Drive apparatus |
| DE102007008492A1 (en) * | 2007-02-21 | 2008-08-28 | Kirchner Elektrotechnik Gmbh | Transmission device for flexible transmission of torque between drive shaft and output shaft, has drive shaft, which has spindle shaft section, and spindle nut, which is moved in translative manner on spindle shaft section |
| CN108777528A (en) * | 2018-06-26 | 2018-11-09 | 苏州舍勒智能科技有限公司 | A kind of split type servo electric jar |
| DE102007014714B4 (en) | 2006-04-05 | 2022-11-10 | Sew-Eurodrive Gmbh & Co Kg | spindle motor |
-
1995
- 1995-06-03 DE DE29521602U patent/DE29521602U1/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19836683A1 (en) * | 1998-08-13 | 2000-02-17 | Schaeffler Waelzlager Ohg | Screw drive unit for electric actuators in automobiles comprises an intermediate glide layer which is attached to the carrier element and is directly in contact with the threaded spindle profile |
| DE10209510A1 (en) * | 2002-03-05 | 2003-09-18 | Siemens Ag | Servo drive, e.g. for use in door locks in motor vehicles, has electric motor in holder driving threaded spindle that longitudinally moves rod with internal thread in guide |
| DE20302137U1 (en) | 2002-09-16 | 2003-04-24 | Dewert Antriebs- und Systemtechnik GmbH & Co KG, 32278 Kirchlengern | Electric motor furniture driver has drive motor and spindle connected in a rail section housing |
| DE102004058935A1 (en) * | 2004-12-07 | 2006-06-08 | Bosch Rexroth Ag | Electrically driven linear actuator |
| US8499654B2 (en) | 2004-12-07 | 2013-08-06 | Bosch Rexroth Ag | Electrically driven linear actuator |
| WO2007087877A1 (en) * | 2006-01-20 | 2007-08-09 | Sommer Antriebs- Und Funktechnik Gmbh | Drive apparatus |
| CN101360882B (en) * | 2006-01-20 | 2013-07-10 | 佐默驱动及无线电技术有限公司 | Drive apparatus |
| DE102007014714B4 (en) | 2006-04-05 | 2022-11-10 | Sew-Eurodrive Gmbh & Co Kg | spindle motor |
| DE102007008492A1 (en) * | 2007-02-21 | 2008-08-28 | Kirchner Elektrotechnik Gmbh | Transmission device for flexible transmission of torque between drive shaft and output shaft, has drive shaft, which has spindle shaft section, and spindle nut, which is moved in translative manner on spindle shaft section |
| CN108777528A (en) * | 2018-06-26 | 2018-11-09 | 苏州舍勒智能科技有限公司 | A kind of split type servo electric jar |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R207 | Utility model specification |
Effective date: 19971127 |
|
| R150 | Utility model maintained after payment of first maintenance fee after three years |
Effective date: 19980806 |
|
| R151 | Utility model maintained after payment of second maintenance fee after six years |
Effective date: 20010710 |
|
| R158 | Lapse of ip right after 8 years |
Effective date: 20031231 |