DE202009013747U1 - ratchet wrench - Google Patents

Abstract

Ratchet spanner, comprising
- A base body (10), wherein an annular head part (11) is arranged at one end of the base body (10), a plurality of ratchet teeth (12) on the inner peripheral wall (110) arranged distributed, and an annular groove (13) with greater inner width at the lower end of the inner peripheral wall (110) is arranged;
- A drive head (20) which is rotatably disposed in the interior of the head part (11), wherein a lower part of the drive head (20) is designed as a plug-in part (23) in the form of a square column, the plug-in part (23) plugged into a workpiece is, a ball body (84) is arranged partially projecting on one side of the male part (23); three notches (212) are arranged at the same center angle on the circumference of the upper portion (200) of the drive head (20), so that a clamping part (21) in the form of a triangular column in the upper region (200) of the drive head (20) is formed , in each case a sheet metal body (211) in both sides of the upper end of the clamping part ...

Description

Technical area

The The present invention relates to a ratchet wrench, wherein a connecting element, a spring leaf and a control component are mitbewegbar and three pawls inside the ratchet wrench are arranged so that the force to be carried is deconcentrated.

State of the art

From the US 4497227 is a conventional ratchet wrench known, with one or two pawls side of the drive head 20 is taken or are, the ratchet teeth of the pawl toothed with the arranged on the inner wall of the head part of the base body ratchet teeth, and a lid is arranged on the head part, a spring is connected at one end to the lid, the other end of the spring with the pawl is connected, the rotation of the spring by the rotation of the lid 40 is controlled, and the pawl is then moved to pivot by the spring, so that the drive head is controlled to rotate in a clockwise or counterclockwise direction.

• 1. Der Ratschenschlüssel wird zur Drehung im Uhrzeigersinn oder gegen den Uhrzeigersinn gesteuert, indem die Feder durch den Deckel bewegt wird, so dass die Klinke zum Schwenken angetrieben wird. Die Feder muss im Betrieb eine größere Gegenkraft tragen, so dass es leicht zur Elastitätsermüdung führt und die Verzahnung der Klinkenzähne mit den Ratschzähnen nicht fest ist.
• 2. Eine Nut ist zur Aufnahme der Feder am Deckel 40 eingearbeitet. Aber die Nut ist nicht rund gestaltet und muss mit Hilfe einer Fräsbank hergestellt werden. Daher ist die Bearbeitung zeit- und kostenaufwändig.
• 3. Nach dem Prinzip des Betriebes des Ratschenschlüssels muss die Feder eine bestimmte Länge aufweisen, die der Forderung des elastischen Betriebes bei dem Rückschub der Klinkenzähne von den Ratschzähnen entspricht, der Deckel muss einen größeren Durchmesser aufweisen, um die Feder aufzunehmen, das Kopfteil des Ratschenschlüssels muss auch mit der eine bestimmte Länge aufweisenden Feder, mit dem einen Durchmesser aufweisenden Deckel und mit der eine Größe aufweisenden Klinke zusammenwirken. So ist es unmöglich, ein Werkstück in unterschiedlichen Größen mit solch einem Ratschenschlüssel zu bedienen.
• 4. Wenn die beiden Federn beim Zusammenbauen zuerst an der Klinke angebracht sind und der Deckel dann angeordnet wird, richten sich die Aufnahmenuten sehr schwer nach den beiden Federn, da die Aufnahmenuten nach unten gerichtet sind. Daher ist das Zusammenbauen des Ratschenschlüssels problematisch.

The Indian US 4497227 described ratchet wrench has the following defects:

• 1. The ratchet wrench is controlled to rotate clockwise or counterclockwise by moving the spring through the lid so that the pawl is driven to pivot. The spring has to carry a greater counterforce during operation, so that it easily leads to fatigue fatigue and the teeth of the ratchet teeth with the ratchet teeth is not fixed.
• 2. A groove is for receiving the spring on the lid 40 incorporated. But the groove is not round and must be made using a milling bench. Therefore, the processing is time consuming and costly.
• 3. According to the principle of operation of the ratchet wrench, the spring must have a certain length, which corresponds to the requirement of elastic operation in the repulsion of the ratchet teeth of the ratchet teeth, the lid must have a larger diameter to accommodate the spring, the head part of the ratchet wrench must also cooperate with the spring having a certain length, with the lid having a diameter, and with the pawl having a size. So it is impossible to operate a workpiece in different sizes with such a ratchet wrench.
• 4. If the two springs are first attached to the latch when assembling and the cover is then placed, the grooves are very difficult to align with the two springs, as the grooves are directed downwards. Therefore, assembling the ratchet wrench is problematic.

From the US Pat. No. 6,769,330 B2 another ratchet wrench is known, wherein the operative end of the base body 10 the ratchet wrench receives a drive head, the drive head receives two pawls on both sides, the ratchet teeth of the pawl are intermeshable with the ratchet teeth arranged on the inner wall of the base body and the two pawls are connected to two spring elements so that the pawls are positioned. The Indian US Pat. No. 6,769,330 B2 ratchet key described has the following advantages: the spring element is arranged around the outer circumference of the drive head and in the US 4497227 is a larger space occupied by the spring element, this disadvantage by the spring element after the US Pat. No. 6,769,330 B2 is canceled. But the ratchet wrench after the US Pat. No. 6,769,330 B2 However, it has the following defects: the spring element is made wire-shaped, one end of the spring element is connected to the drive head, and the other end of the spring element is connected to the pawl, so that it is impossible, the ratchet wrench for rotation in a clockwise and counterclockwise direction to steer and panning the latch. Therefore, it is only possible to control the ratchet wrench for rotation in a single direction. If the operator wishes to operate the ratchet wrench to rotate in the other direction, the ratchet wrench must be turned over.

Subject of the invention

Of the present invention is based on the object, a ratchet wrench indicate that it has three latches, with the latches being movable, so that the rotation is clockwise or counterclockwise is controlled.

The object is achieved according to the present invention by a ratchet wrench, wherein a drive head is received in a head part of the ratchet wrench, a clamping part is arranged on the drive head, the clamping part has three notches on the circumference and is designed in the form of a triangular column, and a Ring groove is arranged on the circumference of the clamping part, a pawl is received in each notch and is pivotable, a recess and two connecting holes on the upper side surface of the pawl are arranged, a connecting element at both ends has two connecting legs, two adjacent latches by means of the connecting holes and the two connecting legs are plugged connected, so that the three latches with the help of the three verbin are mounted with a triangular spring leaf at the location of the annular groove on the clamping part, and a hub and a heart-shaped spring are arranged on the head part, a moving pin on the lower side of the turntable is arranged, the moving pin, the heart-shaped spring and one of the pawls can move when the turntable is rotated, the other two pawls are then moved by this pawl and the three connecting elements, so that the ratchet teeth arranged on one side of the pawl are meshed with the arranged on the inner wall of the head part ratchet teeth and the drive head for Rotation is controlled in a clockwise or counterclockwise direction.

Brief description of the drawings

1 Ratchet wrench according to the present invention in an exploded perspective view;

2 Ratchet wrench according to the present invention in assembled condition partially shown in section;

3 Ratchet wrench according to the present invention shown in assembled condition;

4 Ratchet wrench according to the present invention shown in plan view;

5 Ratchet wrench after 4 shown in section along AA;

6 schematic representation of the interaction of the inner components of the ratchet wrench according to the present invention in the drive for clockwise rotation, and

7 Schematic representation of the interaction of the inner components of the ratchet wrench according to the present invention in the drive for counterclockwise rotation.

Preferred embodiment

• – oder Basiskörper 10 an einem Ende ein ringförmiges Kopfteil 11 aufweist, eine Vielzahl von Ratschenzähnen 12 an der inneren Wand 110 des Kopfteiles 11 verteilt angeordnet ist, und eine Ringnut 13 mit größerer Innenweite am unteren Ende der inneren Wand 110 angeordnet ist;
• – der Antriebskopf 20 drehbar im Inneren des Kopfteiles 11 angeordnet ist, der untere Teil des Antriebskopfes 20 als Steckteil 23 in Form von einer quadratischen Säule ausgeführt ist, das Steckteil 23 mit einem Werkstück steckend verbindbar ist, ein Loch 231 zur Aufnahme eines Kugelkörpers 84 auf einer Seite des Steckteiles 23 angeordnet ist; drei Kerben 212 mit gleichem Mittelpunktswinkel am Umfang des oberen Bereiches 200 des Antriebskopfes 20 angeordnet sind, so dass ein Klemmteil 21 in Form von einer dreieckigen Säule im oberen Bereich 200 des Antriebskopfes 20 gebildet ist, jeweils ein Blechkörper 211 in beiden Seiten des oberen Endes des Klemmteiles 21 vorspringend angeordnet ist, die Ausdehnungslänge der beiden Blechkörper 211 größer als die maximale Breite des Klemmteiles 21 ist, eine Ringnut 22 am Umfang des Klemmteiles 21 angeordnet ist, ein erster Gewindeabschnitt 241 und ein durchgehendes und stufenförmiges Loch 24 in der Mitte des Antriebskopfes 20 angeordnet sind, der erste Gewindeabschnitt 241 sich am oberen offenen Ende des durchgehenden Loches 24 befindet, das durchgehende Loch 24 mit dem Loch 231 verbunden ist, der Antriebskopf 20 im mittleren Bereich auf der Umfangsfläche zwischen dem Steckteil 23 und dem Klemmteil 21 einen Ringrand 25 mit größerem Außendurchmesser aufweist, der Ringrand 25 in die Ringnut 13 des Basiskörpers 10 eingelegt ist;
• – jede der drei Klinken 30 jeweils in einer Kerbe 212 aufgenommen ist und in der Kerbe 212 schwenkbar ist, jede Klinke 30 auf einer Seite eine Anzahl von Klinkenzähnen 31 aufweist, die mit den Ratschenzähnen 12 des Kopfteiles 11 verzahnbar sind, die Klinke 30 auf der anderen Seite im mittleren Bereich eine konkave Bogenfläche 33 aufweist, eine Vertiefung 32 und zwei in beiden Seiten der Vertiefung 32 liegende Verbindungslöcher 34 auf der oberen Seite der Klinke 30 angeordnet sind;
• – jedes der drei Verbindungselemente 40 an beiden Enden zur Bildung eines vorspringenden Verbindungsschenkels 41 gebogen ist, zwei Verbindungsschenkel 41 jedes Verbindungselementes 40 jeweils in die Verbindungslöcher 34 der beiden benachbarten Klinken 30 gesteckt sind, und die drei Klinken 30 mit Hilfe der drei Verbindungselemente 40 mitbewegbar sind;
• – das Federblatt 50 dreieckig gestaltet ist und an der Stelle der Ringnut 22 am Klemmteil 21 aufgesteckt ist, das Federblatt 50 auf drei Seitenflächen im mittleren Bereich jeweils eine elastische konvexe Bogenfläche 51 aufweist, die konvexe Bogenfläche 51 sich in der Mitte der ebenen Fläche befindet und in die konkave Bogenfläche 33 der Klinke 30 eingelegt ist, die konvexe Bogenfläche 51 gegen die konkave Bogenfläche 33 gedrückt ist, wenn die Klinke 30 mit den Ratschenzähnen 12 verzahnt, und vorgeschoben oder zurückgeschoben ist, der Vorschub der Klinkenzähne 31 mittels der elastischen Druckkraft des Federblattes 50 erreicht ist, nachdem die Klinke 30 zurückgeschoben worden ist, das Federblatt 50 mit Ausnahme der konvexen Bogenfläche 51 mit dem Rand der Ringnut 22 bündig verbunden ist, wenn das Federblatt 50 in die Ringnut 22 eingelegt ist;
• – das Steuerbauteil 60 eine Drehscheibe 61 und eine herzförmige Feder 62 umfasst, die Drehscheibe 61 am oberen Ende des Kopfteiles 11 des Basiskörpers 10 angeordnet ist, ein Rändel auf der oberen Seitenfläche der Drehscheibe 61 angeordnet ist und eine Öffnung 611 in der Mitte der Drehscheibe 61 aufweist, ein Durchgangsloch 613 mit reduzierter Innenweite im unteren Bereich der Öffnung 611 angeordnet ist, ein Bewegungsbolzen 612 in der exzentrischen Stelle auf der unteren Seite der Drehscheibe 61 angeordnet ist, ein geschlossenes Spitzenende 621 an einem Ende der herzenförmigen Feder 62 gebildet ist, der Bewegungsbolzen 612 der Drehscheibe 61 in den vm Spitzenende 621 umschlossenen Raum einlegbar ist, die herzförmige Feder 62 am anderen Ende einen vorspringenden Schenkel 622 aufweist, der vorspringende Schenkel 622 in die Vertiefung 32 der Klinke 30 gesteckt ist, der Bewegungsbolzen 612 die herzförmige Feder 62 zur Drehung mitbewegt, und der vorspringende Schenkel 622 eine der Klinken 30 mitbewegt, wenn die Drehscheibe 61 gedreht ist, die Synchronisation des Schwenkens der drei Klinken 30 in jeder Kerbe 212 mittels der drei Verbindungselemente 40 erreicht ist;
• – das Befestigungselement 70 einen zweiten Gewindeabschnitt 72 aufweist, das Befestigungselement 70 durch die Öffnung 611 der Drehscheibe 61 geführt und mit Hilfe des zweiten Gewindeabschnittes 72 und des ersten Gewindeabschnittes 241 an dem Antriebskopf 20 verschraubt ist, so dass die Drehscheibe 61 und der Antriebskopf 20 drehbar am Kopfteil 11 des Basiskörpers 10 angeordnet sind, das Befestigungselement 70 ein in Axialrichtung durchgehendes Loch 71 aufweist;
• – das Schnellabbaubauteil 80 eine Steuerstange 81, ein Schraubelement 82, eine Feder 83 und einen Kugelkörper 84 umfasst, die Steuerstange 81 von unten nach oben in das durchgehende Loch 24 des Antriebskopfes 20 geführt ist, eine konkave Vertiefung 811 zur Aufnahme des Kugelkörpers 84 im unteren Bereich der Steuerstange 81 am Umfang angeordnet ist, die Vertiefung 811 nach dem Loch 231 des Steckteiles 23 gerichtet ist, die Wandfläche der Vertiefung 811 stufenförmig gestaltet ist, ein dritter Gewindeabschnitt 812 am oberen Ende der Steuerstange 81 angeordnet ist, der dritte Gewindeabschnitt 812 vm oberen Ende des durchgehenden Loches 24 des Antriebskopfes 20 nach außen vorspringt, das Schraubelement 82 in der Öffnung 611 der Drehscheibe 61 aufgenommen ist, das Schraubelement 82 mit Hilfe des dritten Gewindeabschnittes 812 an der Steuerstange 81 verschraubt ist, die Feder 83 in der Öffnung 611 der Drehscheibe 61 aufgenommen ist, ein Ende der Feder 83 gegen das Bodenteil der Öffnung 611 gedrückt ist, und das andere Ende der Feder 83 gegen das Schraubelement 82 gedrückt ist; ein Kugelkörper 84 im Loch 231 des Steckteiles 23 und der Vertiefung 811 der Steuerstange 81 aufgenommen ist.

As in 1 and 2 illustrated, the ratchet wrench according to the present invention comprises a base body 10 , a drive head 20 , three latches 30 , three fasteners 40 , a spring leaf 50 , a tax component 60 , a fastener 70 and a quick-release component 80 , in which

• - or base body 10 at one end an annular head part 11 has a variety of ratchet teeth 12 on the inner wall 110 of the head part 11 is arranged distributed, and an annular groove 13 with larger inner width at the lower end of the inner wall 110 is arranged;
• - the drive head 20 rotatable inside the head part 11 is arranged, the lower part of the drive head 20 as a plug-in part 23 designed in the form of a square pillar, the male part 23 can be connected with a workpiece, a hole 231 for receiving a spherical body 84 on one side of the male part 23 is arranged; three notches 212 with the same center angle at the circumference of the upper area 200 of the drive head 20 are arranged so that a clamping part 21 in the form of a triangular column in the upper area 200 of the drive head 20 is formed, in each case a sheet metal body 211 in both sides of the upper end of the clamping part 21 arranged projecting, the extension length of the two sheet metal body 211 greater than the maximum width of the clamping part 21 is, an annular groove 22 on the circumference of the clamping part 21 is arranged, a first threaded portion 241 and a continuous and stepped hole 24 in the middle of the drive head 20 are arranged, the first threaded portion 241 at the upper open end of the through hole 24 located, the through hole 24 with the hole 231 connected, the drive head 20 in the middle area on the peripheral surface between the male part 23 and the clamping part 21 a ring edge 25 having larger outer diameter, the ring edge 25 in the ring groove 13 of the base body 10 is inserted;
• - each of the three latches 30 each in a notch 212 is included and in the notch 212 is pivotable, each latch 30 on one side a number of ratchet teeth 31 that with the ratchet teeth 12 of the head part 11 toothed, the latch 30 on the other side in the central area a concave arch surface 33 has, a recess 32 and two in both sides of the well 32 lying communication holes 34 on the upper side of the latch 30 are arranged;
• - Each of the three fasteners 40 at both ends to form a projecting connecting leg 41 bent, two connecting legs 41 each connecting element 40 each in the communication holes 34 the two neighboring latches 30 are plugged, and the three pawls 30 with the help of the three connecting elements 40 are mitbewegbar;
• - the spring leaf 50 is triangular and in place of the ring groove 22 on the clamping part 21 is attached, the spring leaf 50 on three side surfaces in the middle region in each case an elastic convex arc surface 51 has, the convex arc surface 51 is in the middle of the flat surface and in the concave arch surface 33 the latch 30 is inserted, the convex arc surface 51 against the concave arch surface 33 is pressed when the latch 30 with the ratchet teeth 12 interlocked, and advanced or zurückge pushed, the advance of the ratchet teeth 31 by means of the elastic pressure force of the spring leaf 50 is reached after the latch 30 has been pushed back, the spring leaf 50 with the exception of the convex arch surface 51 with the edge of the ring groove 22 is flush connected when the spring leaf 50 in the ring groove 22 is inserted;
• - the tax component 60 a hub 61 and a heart-shaped spring 62 includes, the turntable 61 at the top of the headboard 11 of the base body 10 is arranged, a knurl on the upper side surface of the turntable 61 is arranged and an opening 611 in the middle of the turntable 61 has, a through hole 613 with reduced internal width in the lower part of the opening 611 is arranged, a movement bolt 612 in the eccentric position on the lower side of the turntable 61 is arranged, a closed top end 621 at one end of the heart-shaped spring 62 is formed, the motor bolt 612 the turntable 61 in the vm top end 621 enclosed space is inserted, the heart-shaped spring 62 at the other end a projecting thigh 622 has, the projecting leg 622 into the depression 32 the latch 30 is plugged, the movement bolt 612 the heart-shaped spring 62 moved to rotate, and the projecting leg 622 one of the latches 30 moved when the turntable 61 is rotated, the synchronization of the swing of the three pawls 30 in every notch 212 by means of the three connecting elements 40 is reached;
• - The fastener 70 a second threaded portion 72 has, the fastener 70 through the opening 611 the turntable 61 guided and with the help of the second threaded portion 72 and the first threaded portion 241 on the drive head 20 is bolted, so the turntable 61 and the drive head 20 rotatable on the headboard 11 of the base body 10 are arranged, the fastening element 70 an axially continuous hole 71 having;
• - the quick-release component 80 a control rod 81 , a screw 82 , a feather 83 and a spherical body 84 includes, the control rod 81 from bottom to top in the through hole 24 of the drive head 20 is guided, a concave depression 811 for receiving the spherical body 84 in the lower part of the control rod 81 arranged on the circumference, the recess 811 after the hole 231 of the plug-in part 23 is directed, the wall surface of the recess 811 is stepped, a third threaded section 812 at the upper end of the control rod 81 is arranged, the third threaded portion 812 at the top of the through hole 24 of the drive head 20 protrudes outwards, the screw 82 in the opening 611 the turntable 61 is included, the screw 82 with the help of the third threaded section 812 on the control rod 81 screwed down, the spring 83 in the opening 611 the turntable 61 is included, one end of the spring 83 against the bottom part of the opening 611 is pressed, and the other end of the spring 83 against the screw 82 is pressed; a spherical body 84 in the hole 231 of the plug-in part 23 and the depression 811 the control rod 81 is included.

As in 2 to 5 shown is the spring leaf 50 when assembling at the location of the annular groove 22 on the clamping part 22 attached. The drive head 20 is inside the header 11 added. The handle 30 is in the notch 212 added. The convex arch surface 51 of the spring leaf 50 is in the concave arch surface 33 the latch 30 inserted. The two connecting legs 41 each connecting element 40 are each in the communication holes 34 the two neighboring latches 30 plugged. The control rod 81 and the spherical body 84 are in the through hole 24 of the drive head 20 added. The upper open end of the headboard 11 is through the turntable 61 covered. The motor bolt 612 is in the top of the line 621 the heart-shaped spring 62 enclosed space. The protruding thigh 622 the heart-shaped spring 62 is in the depression 32 a latch 30 plugged. The fastener 70 is in the opening 611 the turntable 61 received and by means of the second threaded portion 72 and the first threaded portion 241 at the drive head 20 screwed. The feather 83 is in the opening 611 added. The screw element 82 lies on the upper end of the spring 83 and is by means of the third threaded portion 812 on the control rod 81 screwed.

As in 1 . 6 and 7 The operator rotates the turntable during operation 61 , The motor bolt 612 , the heart-shaped spring 62 and the connecting element 40 are designed so that the three latches 30 in the notches 212 To the left and right are pivotable to the teeth of the left or right ratchet teeth of the pawl 30 with the ratchet teeth 12 of the base body 10 select. This is achieved, the rotation of the drive head 20 to switch clockwise or counterclockwise. Because the concave arch surface 33 the latch 30 from the convex arch surface 51 of the spring leaf 50 is pressed, the teeth of the ratchet teeth 31 the latch 30 with the ratchet teeth 12 of the base body 10 being held. In 6 the drive is shown schematically for clockwise rotation. In 7 the drive is shown schematically for counterclockwise rotation.

The present invention relates to a ratchet wrench, wherein a head part ( 11 ) at one end of the base body ( 10 ) is arranged, a drive head ( 20 ) within the header ( 11 ), a clamping part ( 21 ) on the drive head ( 20 ) is arranged, the clamping part ( 21 ) at the circumference three notches ( 212 ) is designed in the form of a triangular column and at the periphery of an annular groove ( 22 ), in each case one pawl ( 30 ) in each notch ( 22 ) and is pivotable, a recess ( 32 ) and two communication holes ( 34 ) on the upper side surface of the pawl ( 30 ) are arranged, each two adjacent latches ( 30 ) by means of the connecting holes ( 34 ) and at both ends of the connecting element ( 40 ) arranged connecting legs ( 41 ), the three latches ( 30 ) by means of the three connecting elements ( 40 ) are mitbewegbar, a triangular spring leaf ( 50 ) in the position of the annular groove ( 200 ) on the clamping part ( 21 ), and a turntable ( 61 ) and a heart shaped spring ( 62 ) on the headboard ( 11 ), one on the lower side of the turntable ( 61 ) arranged movement bolt ( 612 ) the heart-shaped spring ( 62 ) and one of the pawls ( 30 ) is moved to rotate, and the other two pawls ( 30 ) then through this latch ( 30 ) and the three connecting elements ( 40 ) are moved so that on one side of the pawl ( 30 ) arranged ratchet teeth ( 31 ) with the on the inner wall of the head part ( 11 ) arranged ratchet teeth ( 110 ) are toothed to the drive head ( 20 ) for clockwise or counterclockwise rotation.

• 1. Der Antriebskopf ist zur Drehung im Uhrzeigersinn oder gegen den Uhrzeigersinn durch die drei in gleichem Lauf mitbewegbaren Klinken 30 gesteuert, so dass die der Klinke 30 ausgesetzte Belastung reduziert ist, und die den drei Klinken 30 ausgesetzte Belastung ist von drei Seiten des Federblattes 50 getragen. Dadurch ist das Federblatt 50 vor Ermüdung geschützt.
• 2. Das Federblatt 50 ist an der Stelle der Ringnut 22 am Klemmteil 21 aufgesteckt, so dass kein größerer Raum belegt ist, und es möglich ist, das Federblatt 50 am Ratschenschlüssel in unterschiedlicher Größe anzubringen.
• 3. Die konvexe Bogenfläche 51 weist Elastizität auf, liegt in der Mitte eines Seitenabschnittes des Federblattes 50 und ist in die konkave Bogenfläche 33 der Klinke 30 eingelegt, so dass die Klinke 30 flexible schwenkbar ist und eine wirkungsvolle Druckkraft gegen die Klinke 30 wirkungsvoll gewährleistet ist.
• 4. Das Federblatt 50 ist in Form eines dreieckigen dünnen Blattes ausgeführt und innerhalb der Ringnut 22 am Klemmteil 21 aufgesteckt, so dass kein Raum belegt ist, die Gestaltung des durchgehenden Loches 24 einen Durchmesser in Standardgröße aufweist, und die Entfernung des Abbaubauteils 80 erleichtert ist.

The inventive design of the ratchet wrench has the following advantages:

• 1. The drive head is rotated clockwise or counterclockwise by the three catches that can be moved in the same direction 30 controlled so that the the pawl 30 exposed load is reduced, and the three latches 30 exposed load is from three sides of the spring leaf 50 carried. This is the spring leaf 50 protected against fatigue.
• 2. The spring leaf 50 is in the place of the ring groove 22 on the clamping part 21 plugged so that no larger space is occupied, and it is possible the spring leaf 50 to install on the ratchet wrench in different sizes.
• 3. The convex arch surface 51 has elasticity, lies in the middle of a side portion of the spring leaf 50 and is in the concave arch surface 33 the latch 30 inserted so that the latch 30 Flexible is pivotable and an effective pressure force against the latch 30 is effectively guaranteed.
• 4. The spring leaf 50 is in the form of a triangular thin sheet and inside the ring groove 22 on the clamping part 21 plugged so that no space is occupied, the design of the through hole 24 has a standard size diameter and the removal of the degradation component 80 is relieved.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - US 4497227 [0002, 0003, 0004]
• - US 6769330 B2 [0004, 0004, 0004, 0004]

Claims (4)

Ratchet wrench, comprising - a base body ( 10 ), wherein an annular head part ( 11 ) at one end of the base body ( 10 ), a plurality of ratchet teeth ( 12 ) on the inner peripheral wall ( 110 ) is distributed, and an annular groove ( 13 ) with greater inner width at the lower end of the inner peripheral wall ( 110 ) is arranged; A drive head ( 20 ) rotatable in the interior of the head part ( 11 ), wherein a lower part of the drive head ( 20 ) as a plug-in part ( 23 ) in the form of a square column, the male part ( 23 ) is plugged into a workpiece, a ball body ( 84 ) partially projecting on one side of the male part ( 23 ) is arranged; three notches ( 212 ) with the same center angle at the circumference of the upper area ( 200 ) of the drive head ( 20 ) are arranged, so that a clamping part ( 21 ) in the form of a triangular column in the upper area ( 200 ) of the drive head ( 20 ) is formed, in each case a sheet metal body ( 211 ) in both sides of the upper end of the clamping part ( 21 ) is projecting, the extension length of the two sheet metal body ( 211 ) greater than the maximum width of the clamping part ( 21 ) is an annular groove ( 22 ) on the circumference of the clamping part ( 21 ) is arranged, a first threaded portion ( 241 ) in the middle of the drive head ( 20 ), the drive head ( 20 ) in the central region on the peripheral surface between the male part ( 23 ) and the clamping part ( 21 ) a ring edge ( 25 ) having a larger outer diameter, the ring edge ( 25 ) in the annular groove ( 13 ) of the base body ( 10 ) is inserted; - three latches ( 30 ), each pawl ( 30 ) each in a notch ( 212 ) and pivotable in the notch ( 30 ), each pawl ( 30 ) on one side a plurality of ratchet teeth ( 31 ), which with the ratchet teeth ( 12 ) of the head part ( 11 ) are toothed, the pawl ( 30 ) on the other side in the central region a concave arc surface ( 33 ), a recess ( 32 ) and two in both sides of the depression ( 32 ) lying communication holes ( 34 ) on the upper side surface of the pawl ( 30 ) are arranged; - three connecting elements ( 40 ), each connecting element ( 40 ) at both ends to form a projecting connecting leg ( 41 ), two connecting legs ( 41 ) of each connecting element ( 40 ) each into the communication holes ( 34 ) of the two adjacent latches ( 30 ) and the three latches ( 30 ) by means of the three connecting elements ( 40 ) are mitbewegbar; - a triangular spring leaf ( 50 ), wherein the spring leaf ( 50 ) at the location of the annular groove ( 22 ) on the clamping part ( 21 ), the spring leaf ( 50 ) on three side surfaces in the middle region in each case an elastic convex arc surface ( 51 ), the convex arc surface ( 51 ) in the concave arc surface ( 33 ) the pawl ( 30 ), the convex arc surface ( 51 ) is located in the central region of the flat surface, the concave arc surface ( 33 ) against the convex arc surface ( 51 ), when the feed or retraction of the ratchet teeth ( 31 ) in the toothing of the pawl ( 30 ) with the ratchet teeth ( 12 ), and the advance of the ratchet teeth ( 31 ) by means of the elastic pressure force of the spring leaf ( 50 ) is reached after the latch 30 has been postponed; A control component ( 60 ), which is a hub ( 61 ) and a heart-shaped spring ( 62 ), wherein the turntable ( 61 ) on the upper end of the head part ( 11 ) of the base body ( 10 ), an opening ( 611 ) in the middle of the upper side of the turntable ( 61 ) is provided, a through hole ( 613 ) with reduced internal width in the lower region of the opening ( 611 ) is arranged, a movement bolt ( 612 ) at the eccentric location on the lower side of the turntable ( 61 ), a closed tip end ( 621 ) at one end of the heart-shaped spring ( 62 ), the movement bolt ( 612 ) of the turntable ( 61 ) in the from the top ( 621 ) is enclosed space, the heart shaped spring ( 62 ) at the other end a projecting leg ( 622 ), the projecting leg ( 622 ) into the depression ( 32 ) the pawl ( 30 ), the movement bolt ( 612 ) the heart shaped spring ( 62 ) moved to rotate, the projecting leg ( 622 ) then one of the pawls ( 30 ), when the turntable ( 61 ), the synchronization of the pivoting of the three pawls ( 30 ) in each notch ( 212 ) by means of the three connecting elements ( 40 ) is reached; and a fastening element ( 70 ), which has a second threaded section ( 72 ), wherein the fastening element ( 70 ) through the opening ( 611 ) of the turntable ( 61 ) and with the help of the second threaded portion ( 72 ) and the first threaded portion ( 241 ) on the drive head ( 20 ), so that the turntable ( 61 ) and the drive head ( 20 ) rotatable on the head part ( 11 ) of the base body ( 10 ) are arranged, the fastener ( 70 ) an axially continuous hole ( 71 ) having. Ratchet wrench according to claim 1, wherein the spring leaf ( 50 ) in the annular groove ( 22 ) and with the exception of the convex arc surface ( 51 ) is flush with the edge of the groove, the convex arc surface ( 51 ) protrudes from the groove edge. Ratchet wrench according to claim 1, wherein a knurl on the upper side surface of the turntable ( 61 ) is arranged. Ratchet wrench according to claim 1, wherein a hole ( 231 ) for receiving a spherical body ( 84 ) on one side of the male part ( 23 ), a continuous step-shaped hole ( 24 ) in the middle of the drive head ( 20 ) is provided, the through hole ( 24 ) with the hole ( 231 ), a control rod ( 81 ) from bottom to top in the through hole ( 24 ) of the drive head ( 20 ), a depression ( 811 ) for receiving the spherical body ( 84 ) is arranged in the lower area on the circumference, the depression ( 811 ) after the hole ( 231 ) of the male part ( 23 ), the depression ( 811 ) is stepped, a third threaded section ( 812 ) at the upper end of the control rod ( 81 ), the third thread section ( 812 ) from the upper end of the through hole ( 24 ) of the drive head ( 20 ) protrudes outwards, the screw ( 70 ) in the opening ( 611 ) of the turntable ( 61 ), the screw element ( 70 ) with the help of the third threaded section ( 812 ) on the control rod ( 81 ), a spring ( 83 ) in the opening ( 611 ) of the turntable ( 61 ), one end of the spring ( 83 ) against the bottom part of the opening ( 611 ), and the other end of the spring ( 83 ) against the screw element ( 70 ), a spherical body ( 84 ) in the hole ( 231 ) of the male part ( 23 ) and the depression ( 811 ) of the control rod ( 81 ) is inserted.