DE102016125747B3 - Elastic element for switching a ratchet wrench and shaping method therefor - Google Patents

Abstract

The invention relates to an elastic element for switching a ratchet wrench, which is produced by bending a T-shaped metal sheet (1), wherein the T-shaped metal sheet (1) is bent so that an elastic disc (11) in an uninterrupted S- Form is formed, wherein at the distal end of the elastic disc (11) a planar abutment part (111) is formed, wherein at the front end of the elastic member (10) has a U-shaped head end (12) is integrally formed, on both sides of two symmetrical Boundary side walls (13) are arranged, which bear tightly against the two sides of the elastic disc (11), wherein the two boundary side walls (13) extend at least to the central portion of the elastic disc (11), this configuration both a significant reduction of Production time, the amount of material and costs for the arrangement of the elastic element as well as a quick and easy fitting of the elastis chen element (10) on the ratchet wrench (20).

Description

Technical area

The invention relates to an elastic element, in particular an elastic element for switching a ratchet wrench and a shaping method thereof.

State of the art

In 13 a conventional ratchet wrench 30 is shown, at one end of a rotary member 40 is attached, wherein a nut or a screw is tightened or loosened by turning the rotary member 40 on the ratchet wrench 30. On the outer edge of the rotary member 40, a toothed annular surface 11 is arranged, which is on one side with a ratchet member 50 is engaged. The ratchet element 50 is movable in a first chamber 31 in the ratchet wrench 30. The ratchet element 50 has an arc face 51 on the end face opposite the engagement side for the rotary element 40. On the ratchet wrench 30, the first chamber 51 is further connected to a second chamber 32 in which a control member 60 is mounted, on which a plug opening 61 is formed, in which a spring 62 is mounted, on the upper end of a cap 63 is attached which, when the spring 62 is applied, abuts against the arc surface 51 of the ratchet member 50. With the control member 60, the cap 63 can be made to selectively bring the ratchet member 50 to press against different sides of the first chamber 31, whereby the ratchet wrench 30 can actuate a nut or a screw by a unidirectional drive.

1. 1. Zwischen dem Sperrzahnelement 50 und dem Steuerglied 80 sind die Feder 62 und die Kappe 63 festgeklemmt, wobei ein Ende der Kappe 63 durch die Feder 62 beaufschlagt wird, während das andere Ende derselben gleitend gegen die Bogenfläche 51 des Sperrzahnelements 50 drückt. Wenn das Sperrzahnelement 50 beim Betätigen des Ratschenschlüssels 30 vibriert oder wenn ein Umschalten mit dem Steuerglied 80 vorgenommen wird, gleitet ein Ende der Kappe 63 auf die Bogenfläche 51 des Sperrzahnelements 50 und das andere Ende derselben reibt seitlich an der Stecköffnung 61 des Steuergliedes 60, sodass die Kappe 63 und die Feder 62 leicht aus der Stecköffnung 61 herausspringen oder sich verformen können, wobei dadurch auch ein Widerstand entsteht, der die Stabilität der Handhabung des Ratschenschlüssels 30 beeinträchtigt. Aus diesem Grund besitzt der herkömmliche Ratschenschlüssel eine mangelhafte konstruktive Festigkeit.
2. 2. Ferner wird zum Zusammenbau des Ratschenschlüssels 30 zunächst das Steuerglied 60 in die zweite Kammer 32 eingebaut. Das Steuerglied 60 wird so angebracht, dass es nur noch drehbar ist.

However, in the above-described construction of a conventional ratchet wrench, there are the following disadvantages:

1. 1. Between the ratchet member 50 and the control member 80, the spring 62 and the cap 63 are clamped, wherein one end of the cap 63 is acted upon by the spring 62, while the other end thereof slidably against the arc surface 51 of the ratchet member 50 presses. When the ratchet member 50 vibrates upon actuation of the ratchet wrench 30 or when switching with the control member 80, one end of the cap 63 slides on the arc surface 51 of the ratchet member 50 and the other end thereof laterally rubs against the insertion hole 61 of the control member 60, thus the cap 63 and the spring 62 can easily pop out of the plug hole 61 or deform, thereby also creating a resistance that affects the stability of the handling of the ratchet wrench 30. For this reason, the conventional ratchet wrench has poor structural strength.
2. 2. Further, the control member 60 is first installed in the second chamber 32 for assembling the ratchet wrench 30. The control member 60 is mounted so that it is only rotatable.

In addition, the spring 62 is inserted from the first chamber 31 into the insertion opening 61. The cap 63 is stuck on the upper end of the spring 62. Since the opening of the first chamber 31 is directed to the rotary member 40, the spring 62 is difficult to attach. In addition, the spring 62 and the cap 63 slightly fall or are lost due to their small size in the process of assembly, so that the assembly is difficult. Furthermore, the conventional ratchet wrench has too many components.

For example, the document discloses US 2005/0178247 A1 Such a conventional structure of a ratcheting tool, wherein as an elastic element in a plug-in opening of the control member, a spring element or a locking element is provided which comprises a first side wall and the first side wall opposite second side wall, wherein the first and the second side wall are connected by a Federvorderwandzwischenstück that biases the first and second side walls toward each other.

In the ratchet type ring spanner according to the publication EP 0 810 068 A1 a ratchet element is movable in a first chamber in the ratchet wrench. Further, a stopper member is mounted in the first chamber and a spring is mounted between the stopper member and the ratchet member to bias the ratchet member away from the stopper member.

From the publication US 2016/0138668 A1 is also a spring component for a ratchet mechanism, such. As a ratchet wrench, known, which is designed so that it is held without special processing in a designated recess. For example, the spring component may be retained at three abutment points, with one wing of the spring component on a pawl and a base portion opposite the wing abutting the drive gear and support arms engageable with the side wall of the recess to secure the spring component in the recess.

According to the document US 5 233 891 A For a ratchet wrench, a one-piece elastic latching means is disclosed which has a substantially flat base, a hemispherical head, the is formed with a rounded end for abutment with a ratchet member and with a flat end. Further, this includes an elastic connecting member which connects the base and the flat end of the head with each other.

In the double ratchet wrench according to the document DE 20 2016 000 551 U1 an elastic return member is provided with a first end portion and a second end portion, the first end portion abutting a locking groove of a first reversing pawl, and the second end portion abutting the locking groove of a second reversing pawl.

Object of the invention

The invention has for its object to overcome the above problems or at least reduce.

Technical solution

This object is achieved by an elastic element for switching a ratchet wrench with the features of claim 1 and a molding method for the elastic element with the features of claim 2. Advantageous embodiments are the subject of the dependent claims.

For the inventive molding method of an elastic element, a T-shaped metal sheet is first produced in a stamping process, wherein the T-shaped metal sheet has a longitudinal sheet metal part and a transverse sheet metal part, wherein the connection point of the longitudinal sheet metal part and the transverse sheet metal part is drawn inwardly so that a bent part is formed is, wherein the cross plate part evasive part opposite to the two sides of the bent part is recessed inwardly. The method of forming an elastic member according to the present invention includes the steps of bending the longitudinal sheet member and the transverse plate member such that the longitudinal plate member and the transverse plate member are perpendicular to each other, forming an elastic disc in an uninterrupted S-shape by repeatedly bending the longitudinal plate member up and down wherein the distal end of the elastic disc is formed as a planar abutment member, and bending the two sides of the transverse plate member respectively in the direction of the longitudinal plate member such that the front end of the transverse plate member forms a U-shaped head end and the two sides of the transverse plate member close to the two Said sides of the longitudinal sheet metal part, whereby two boundary side walls are formed. Thus, an elastic member is formed.

list of figures

• 1 shows a schematic representation of a T-shaped metal sheet according to the invention,
• 2 shows a schematic representation of a first bending operation of a T-shaped metal sheet according to the invention,
• 3 shows a schematic representation of a second bending operation of a T-shaped metal sheet according to the invention,
• 4 shows a schematic representation of a third bending operation of a T-shaped metal sheet according to the invention,
• 5 shows a schematic representation of a made by bending a T-shaped metal sheet elastic member according to the invention,
• 6 shows an exploded view for illustrating the installation of an elastic element according to the invention in a ratchet wrench,
• 7 shows a bottom view of a mounted in a ratchet wrench elastic element according to the invention,
• 8th shows a sectional view of a mounted in a ratchet wrench elastic element according to the invention,
• 9 shows a schematic representation of an application of the elastic element according to the invention in a ratchet element with a different dimension.
• 10 shows a sectional view of an application of the elastic element according to the invention in a ratchet element with a different dimension in the assembled state.
• 11 shows a schematic representation of the use of the elastic element according to the invention when operating the ratchet wrench in a clockwise direction for tightening a bolt or a nut.
• 12 shows a schematic representation of the use of the elastic element according to the invention when operating the ratchet wrench counterclockwise to release a bolt or a nut.
• 13 shows a schematic representation of a conventional ratchet wrench.

Ways of carrying out the invention

In the following, objects, features and advantages of the present invention will become apparent from a detailed description of a Embodiment with reference to the accompanying drawings explained in more detail. However, the invention should not be limited by the description and the accompanying drawings.

How out 1 to 5 is apparent, before the molding process of an elastic member is a T-shaped metal sheet 1 made by punching. The metal sheet 1 has a longitudinal sheet metal part 101 and a crossbeam part 102 on. The elastic element 10 is formed by the following steps: 1. Bending the longitudinal sheet metal part 101 and the transverse plate part 102 such that the longitudinal sheet metal part 101 and the transverse plate part 102 perpendicular to each other, 2. forming an elastic disc 11 in an uninterrupted S-shape by repeatedly bending the longitudinal sheet metal part 101 up and down and forming the distal end of the elastic disc as a flat abutment part 111 3. Bending the two sides of the transverse plate part 102 each in the direction of the longitudinal sheet metal part 101 so that the front end of the transverse plate part 102 a U-shaped headboard 12 forms and the two sides of the transverse plate part 102 close to the two sides of the longitudinal sheet metal part 101 abut, creating two boundary sidewalls 13 are formed, extending at least to the central portion of the elastic disc 11 extend, wherein the height of the bending point of the elastic disc 11 from the height of the boundary sidewalls 13 is limited.

For the installation of the elastic element 10 will be on 5 combined with 6 to 8th directed. The elastic element 10 is for a reversible ratchet wrench 20 used. The ratchet wrench 20 has an operating part 21 and a lever 22 on, with the operating part 21 a continuous round recording 211 for mounting a ratchet wheel 23 is provided, wherein the inner ring edge of an opening on one side of the round recording 211 an annular groove 212 is arranged, in cooperation with a C-ring 213, the ratchet wheel 23 in the recording 211 limited, wherein an arcuate receiving chamber 214 through the bottom of the picture 211 goes and thus with the recording 211 is connected, wherein a ratchet element 24 fitting in the arch-shaped receiving chamber 214 is received, wherein one end of the ratchet element 24 with the ratchet wheel 23 is engaged and thus coupled thereto, while the other end thereof an arcuate trough 241 forms. A recess 215 extends from the bottom of the arcuate receiving chamber 214 down, with the recess 215 through a side wall of the operating part 21 goes through, leaving an opening 216 arises in which a switching element 25 is attached, which is an axial cylinder 251 which is in the recess 215 is installed, wherein on the outside of the opening 261 a boundary plate 252 is formed, wherein at one of the arcuate receiving chamber 214 opposite side of the axial cylinder 251 a recess 253 is arranged, wherein at the recess 253 opposite, extending side of the boundary plate 252 a slide button 254 is arranged. For installation of the ratchet wheel 23 becomes the elastic element 10 with the impulse part 111 the elastic disc 11 in the recess 253 of the switching element 25 used. Furthermore, the switching element 25 with the axial cylinder 251 over the opening 216 into the recess 215 used. In the state in which the elastic element 10 is not loaded with a force, the U-shaped headboard protrudes 12 from the recess 253 out and extends to the arcuate receiving chamber 214 , The ratchet element 24 is in the arch-shaped receiving chamber 214 so attached that its arched trough 241 to the U-shaped headboard 12 of the elastic element 10 abuts. The ratchet wheel 23 will be in the round shot 211 recorded and by means of a C-ring 213 in the recording 211 limited. Thus, a reversible ratchet wrench is assembled.

Will the elastic element 10 for a thicker ratchet element 24 used as in 9 and 10 is shown on one side of the arcuate trough 241 of the ratchet element 24 an attack 242 formed, with the U-shaped head end 12 of the elastic element 10 for abutment against the arcuate trough 241 is brought and further by the attack 242 is limited and positioned, reducing the stability of the interaction of the elastic element 10 with the ratchet element 24 is increased. This will increase the applicability of the elastic element 10 and the ratchet member 24 ensured and the elastic element 10 finds a wide application.

Regarding the use of the elastic element 10 with a ratchet wrench 20 will be on 11 and 12 directed. Because of the switching element 25 is switched to the left or right, the elastic element 10 moved and then presses as far against the ratchet element 24 in that the ratchet element 24 in the ratchet wheel 23 engages, so that the ratchet wheel 23 and the ratchet element 24 rotate in one direction while they are engaged. Will the ratchet wrench 20 turned in the other direction, the engagement is released, so that an idle takes place. In 11 is the switching element 25 put to the right and press clockwise against the arched trough 241 , Will the ratchet wrench 20 Turned clockwise, the ratchet member 24 presses against the ratchet wheel 23 and abuts a side wall of the arcuate trough 241 on, whereby a nut or a bolt is tightened. If the ratchet wrench 20 is rotated counterclockwise, the ratchet element 24 through the ratchet wheel 23 pushed, with the elastic element 10 Elastic retracts inwards, so that an idle takes place. By repeating the previously described operation of the ratchet wrench 20 In one direction a nut or a bolt can be tightened. In 12 is the switching element 25 Opposite to the left and press counterclockwise against the arched trough 241 , When the ratchet wrench 20 is rotated counterclockwise, pushes the ratchet element 24 against the ratchet wheel 23 and abuts the other side wall of the arched trough 241 which loosens a nut or bolt. When the ratchet wrench 20 Turning clockwise will become the ratchet element 24 through the ratchet wheel 23 shifted, with the elastic element 10 Elastic retracts inwards, so that an idle takes place. By repeating the previously described operation of the ratchet wrench 20 In one direction, a nut or a bolt can be loosened.

1. 1. Das elastische Element 10 ist durch Biegen eines T-förmigen Metallbleches 1 einteilig gefertigt und weist eine elastische Scheibe 11 und ein U-förmiges Kopfende 12 auf, wobei die elastische Scheibe in einer ununterbrochenen S-Form ausgebildet ist, was zu einem erhöhten elastischen Effekt beiträgt. Zudem ist das U-förmige Kopfende 12 direkt an einem Ende der elastischen Scheibe 11 geformt, was sowohl zu einer erheblichen Verringerung der Herstellungszeit, der Materialmenge und -kosten als auch zu einem schnellen und leichten Einbau des elastischen Elements 10 in den Ratschenschlüssel 20 beiträgt.
2. 2. Das U-förmige Kopfende 12 umhüllt eine Seite der elastischen Scheibe 11 und ist durch Biegen des Querblechteils 102 geformt, wodurch die Kontaktfläche, mit der das U-förmige Kopfende 12 mit dem Sperrzahnelement 24 in Kontakt steht, erheblich vergrößert wird, wobei das U-förmigen Kopfende 12 und das Sperrzahnelement 24 flächig aneinander anliegen, sodass das elastische Element 20 sicher gegen das Sperrzahnelement 24 drücken und sich somit stabil und präzise verschieben oder in das Sperrrad 23 eingreifen kann.
3. 3. Ferner erstrecken sich von den beiden Seiten des U-förmigen Kopfendes 12 zwei Begrenzungsseitenwände 13, die eng an der elastischen Scheibe 11 anliegen, wodurch die elastische Scheibe 11 seitlich verstärkt wird. Wenn das elastische Element 10 in der Aussparung 253 des Umschaltelements 25 angebracht ist, sind die beiden Begrenzungsseitenwände 13 zeitgleich in der Aussparung 253 aufgenommen, sodass die beiden Begrenzungsseitenwände 13 des elastischen Elements 10 vom Umschaltelement 25 gedrückt werden, wenn das elastische Element 10 mit dem Drehen des Umschaltelements 25 umgeschaltet wird, wobei eine sichere zeitgleiche Verschiebung erzielt wird, sodass eine durch Zusammendrücken verursachte Verformung der elastischen Scheibe 11 vermeidbar ist und dadurch eine längere Lebensdauer des elastischen Elements 10 erzielbar ist.

With the embodiment of the elastic element according to the invention described above, the following advantages can be achieved:

1. 1. The elastic element 10 is by bending a T-shaped metal sheet 1 made in one piece and has an elastic disc 11 and a U-shaped headboard 12 wherein the elastic disc is formed in an uninterrupted S-shape, which contributes to an increased elastic effect. In addition, the U-shaped headboard 12 directly at one end of the elastic disc 11 resulting in a considerable reduction in the production time, the amount of material and costs as well as a quick and easy installation of the elastic element 10 in the ratchet wrench 20 contributes.
2. 2. The U-shaped headboard 12 envelops one side of the elastic disc 11 and is by bending the transverse plate part 102 shaped, whereby the contact surface, with which the U-shaped head end 12 with the ratchet element 24 in contact, is considerably enlarged, with the U-shaped headboard 12 and the ratchet element 24 lie flat against each other, so that the elastic element 20 safe against the ratchet element 24 Press and thus stable and precise move or in the ratchet wheel 23 can intervene.
3. 3. Furthermore, extend from the two sides of the U-shaped headboard 12 two boundary sidewalls 13 that fits tightly to the elastic disk 11 abut, causing the elastic disc 11 is strengthened laterally. If the elastic element 10 in the recess 253 of the switching element 25 is attached, the two boundary side walls 13 at the same time in the recess 253 taken so that the two boundary sidewalls 13 of the elastic element 10 from the switching element 25 be pressed when the elastic element 10 with the turning of the switching element 25 is switched, with a secure simultaneous displacement is achieved, so that caused by compression deformation of the elastic disc 11 is avoidable and thus a longer life of the elastic element 10 is achievable.

Although the present invention has been described in detail with reference to the embodiments, it will be understood by those skilled in the art that the invention is not limited to these embodiments, but rather modifications are possible in such a way that individual features are omitted or other types of combinations of features realized as long as the scope of protection of the appended claims is not abandoned. The disclosure of the present invention includes all combinations of the featured individual features.

LIST OF REFERENCE NUMBERS

1

metal sheet

101

Longitudinal sheet metal part

102

Bulkhead part

10

elastic element

11

elastic disc

111

abutting part

12

U-shaped headboard

13

Limiting sidewall

20

ratchet wrench

21

operation part

211

round recording

212

ring groove

213

C-ring

214

arcuate receiving chamber

215

recess

216

opening

22

lever

23

ratchet wheel

24

Ratchet element

241

arched trough

242

attack

25

switching

251

axial cylinder

252

limiting plate

253

recess

254

sliding button

Claims (3)

Elastic element for switching a ratchet wrench, which is made by bending a T-shaped metal sheet (1), wherein the T-shaped metal sheet (1) is bent so that an elastic disc (11) is formed in a continuous S-shape, wherein the distal end of the elastic disc (11) a planar abutment part (111) is formed, wherein at the front end of the elastic member (10) has a U-shaped head end (12) is integrally formed, arranged on both sides of two symmetrical boundary side walls (13) are closely adjacent to the two sides of the elastic disc (11), wherein the two boundary side walls (13) extend at least to the central portion of the elastic disc (11). A ridge wrench forming elastic element forming method comprising the steps of: Providing a metal sheet (1) having a longitudinal sheet metal part (101) and a transverse sheet metal part (102), Bending the longitudinal sheet metal part (101) and the transverse sheet metal part (102) such that the longitudinal sheet metal part (101) and the transverse sheet metal part (102) are perpendicular to one another, Forming an elastic disc (11) in an uninterrupted S-shape by repeatedly bending the longitudinal plate member (101) up and down, and Bending the two sides of the transverse plate part (102) respectively in the direction of the longitudinal plate part (101) such that the front end of the transverse plate part (102) forms a U-shaped head end (12) and the two sides of the transverse plate part (102) close to the middle one Abut portions of the bent longitudinal sheet metal part (101), whereby two boundary side walls (13) are formed, so that an elastic element (10) is formed. Shaping method according to Claim 1 or 2 , characterized in that the height of the bending point of the elastic disc (11) is limited by the height of the boundary side walls (13).

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