EP2099103A2 - Crimping tool - Google Patents

Abstract

The crimping tool has crimping plungers and a through hole for inserting a cable end that is to be crimped. The inserting of the cable end is limited by an adjustable stop part (2) that is firmly connected with the crimping tool and is detachable in operation. A stop pin (3) has a stop body, which is elastically held in the stop pin to yield in stop direction.

Description

The invention relates to a crimping pliers with Crimpstößeln and a through hole for the introduction of a cable end to be crimped, wherein the introduction of the cable end by an adjustable, fixed to the crimping pliers, but preferably operatively releasable stop member is limited, further wherein the stop member has different stop pins, which optionally by Depressions can be activated and, when another stop pin is selected, the activated stop pin held under pretension in its non-activated position can be released from the stop position.

Such crimping tools have already become known in various embodiments. It is for example on the EP 732779 B1 directed.

In another known crimping tool, the stop member is movable in total, against spring force when a wire part to be crimped or the like is driven against the stopper pin with a certain force, so that a compensating movement can take place. However, this known embodiment is not yet satisfactory in every respect.

Based on the aforementioned prior art, the invention has the object to provide a crimping tool with a stop member, which can react in a favorable manner to the stresses occurring during crimping.

This object is achieved according to a first solution thought in the subject matter of claim 1, wherein it is based on that a stop pin has a stop body and that the stop body is elastically evasive held in the stop pin in the stop direction. The stopper body may then possibly when inserting a wire to be crimped or the like in the direction of attack anyway dodge a limited distance elastic. So a favorable reception of a wire is guaranteed even at high stress.

Furthermore, the invention also has the object of specifying a crimping tool with a stop member, in which an advantageous adjustment is given by an activated stop pin to another activated stop pin.

This object is achieved according to another idea of the solution in the subject matter of claim 2, being based on the fact that the activated stop pin is supported by a spring catch formed by a retaining spring and the spring detent can be canceled by a release movement of the stop member. Accordingly, a further spring is provided, which acts in addition to the stopper pin biasing in its non-activated position spring on the stop pin. In addition, it is provided that this spring, the support spring can be canceled in their effect by a release movement of the stop member. Accordingly, a handling is given, which allows the stop member to raise a total - and then to twist - if another stop pin is to be activated. In the course of lifting, the initially activated stop pin also moves to its non-activated position. After the rotational movement has been made and the stop member is released again, correspondingly abuts the crimping tool, a next stop pin can be moved from its non-activated position to its activated position by simply pressing down.

Furthermore, it is preferred in this context that the release movement of the stop member in the direction of extension of the inserted cable end is feasible. The stop member must be moved to the solution so transversely to the crimp plane relative to the crimping tool. It is further preferred that the stop member to move in the release movement against a spring preload. The spring preload otherwise holds the stop member in contact with the crimping tool. In addition, a form-fit acting against rotation in the contact position of the abutment part on the crimping tool is preferably provided.

In addition, it is preferred that in the course of the release movement, the support spring is spreadable to cancel the spring catch. The support spring for canceling the spring detent of the activated stop pin is correspondingly rendered ineffective by the fact that - locally - elastically bent. This bending or spreading takes place in the course or by the release movement of the stop member.

Furthermore, it is preferred that the support spring extends in a direction transverse to the release movement plane. Although it may also basically extend into the application of an end face of the activated stop pin and may come off as a result of the release movement by sliding thereof, it is preferred that the support spring, at least to a substantial extent, more preferably but also completely, extends in a transverse plane to the release movement. Here, the spreading or out of action Bring the support spring is preferably not done by the immediate interaction with the activated stop pin, but by a separate expansion. This expansion part may preferably be a connecting pin, which has the stop member and via which it is connected to the crimping tool. The spreading can be done in this case by a cooperation between the connecting pin and the support spring. The connecting pin has a spreading extension or spreads as such in the course of the release movement of the stop member, the support spring.

The interaction with the connecting pin and the retaining spring is preferably provided on the stop member radially offset from a locking engagement of the support spring with the activated stop pin. The connecting pin thus does not engage directly, but only indirectly in the latching connection between the support spring and the activated stop pin.

In further detail, it is preferred that the interaction of the retaining spring with the connecting pin is radially inwardly with respect to the cooperation with the stop pin. In this case, it is also preferred, although not necessary, for the abutment part to be altogether at least substantially circular or cylindrical in shape.

It is further preferred that a single support spring is provided for all stop pins of the stop member.

In further detail with respect to the recorded in the stop pin stop body, which is elastically supported ausweichbar in the stop direction, is also preferably provided that the stop body has a stopper body head and that the stopper body head cooperates with a spring member. In cooperation with this spring part results in the elastic evasion. In a further detail, it is also preferred that the stopper body head form a stop shoulder which cooperates in a counter-stop direction formed in the direction opposite the stop direction with a counterstop formed in the interior of the stopper pin. The counter-stop is the outermost limit to the movement of the stopper body against the stop direction. Normally, the stopper body is in the position defined by this stop shoulder.

The stop pin may further preferably have a gripping end. This is particularly preferably a slightly enlarged diameter, button-like end, by pressure on which the stop pin from the described non-activated position in the activated position is displaced as a whole. More preferably, this gripping end may be formed by a gripping part in the stop pin einitzendes. This means in particular a production technology favorable connection, such as by a press fit.

Fig. 1

eine Crimpzange mit aufgesetztem Anschlagteil, in der Seitenansicht;

Fig. 2

eine perspektivische Ansicht des Anschlagteils alleine, gesehen von der Niederdrückseite bezüglich der Anschlagstifte;

Fig. 3

eine perspektivische Ansicht gemäß Fig. 2, jedoch gesehen von der anderen Seite;

Fig. 4

einen Querschnitt durch den Gegenstand gemäß Fig. 1, geschnitten entlang der Linie IV-IV;

Fig. 5

einen Querschnitt durch den Gegenstand gemäß Fig. 2, geschnitten entlang der Linie V-V;

Fig. 6

eine Draufsicht auf die Halterungsfeder;

Fig. 7

eine Einzeldarstellung entsprechend Fig. 5, mit nicht aktiviertem Anschlagstift;

Fig. 8

eine Darstellung gemäß Fig. 7, bei aktiviertem Anschlagstift.

The invention is further explained below with reference to the accompanying drawing, which, however, represents only one embodiment. Hereby shows:

Fig. 1

a crimping tool with attached stop member, in the side view;

Fig. 2

a perspective view of the stop member alone, seen from the depression side with respect to the stop pins;

Fig. 3

a perspective view according to Fig. 2 but seen from the other side;

Fig. 4

a cross section through the article according to Fig. 1 cut along the line IV-IV;

Fig. 5

a cross section through the article according to Fig. 2 cut along the line VV;

Fig. 6

a plan view of the support spring;

Fig. 7

a single presentation accordingly Fig. 5 , with not activated stop pin;

Fig. 8

a representation according to Fig. 7 , with activated stop pin.

Shown and described is with reference to Fig. 1 a crimping tool 1 with a stop member 2 arranged thereon, which is also referred to as a locator.

The crimping tool further has, what is not shown in detail, crimping plunger and a through hole for the introduction of a cable end to be crimped. The introduction of the cable end is limited by the stop member, the stop member depending on the crimped cable has different stop pins, which can be brought into operative position either by turning the stop member and depressing a stop pin 3. A depressed, activated stop pin 3 is biased to its non-activated position. This bias is used when a new stop pin 3 is to be brought into operative position to put the activated stopper pin 3 in its non-activated position.

An activated stop pin is in the Fig. 5 and 8th shown, a non-activated stop pin 3 in Fig. 7 ,

The stopper itself, as from the Fig. 2 to 4 shows, is essentially cylindrical and rotationally symmetrical structure. It has a central fastening means 4, by means of which it is to be attached to the crimping tool 1, for example by means of a screw. The attachment is in this case such that the arranged on a circular arc stop pins 3 are always to bring by turning the stop member 2 in register to the passage opening of the crimping tool. Accordingly, the stopper part 2 eccentrically with respect to the passage opening supported on the crimping tool 1.

In the embodiment, six stop pins 3 are provided.

A stop pin 3 is biased by a compression spring 5 in its non-activated position (see Fig. 5 . 7 . 8th ).

Next, a support spring 6 is provided, in particular compare Fig. 6 , which is arranged in the embodiment in a plane transverse to the depression direction of a stop pin 3. The support spring 6 has a plurality of cooperation regions 7 in which it interacts with a stop pin 3, respectively. The overall substantially cylindrically shaped stop pin 3 has for this purpose an at least over a part of its circumference formed engagement groove 8, in which the corresponding circular curved cooperation region 7 after depression, see Fig. 8 , engages. This is characterized in that the support spring 6 is formed and arranged relative to the stop pins 3 so that the support spring 6 is always pulled under bias respectively radially outward by the in the interaction areas 7 this passing stop pins 3. The interaction between the support spring 6 and a Stop pin 3 in the interaction area 7 is so strong that the depressed locking position according to Fig. 8 , is maintained even against the action of the compression spring 5.

To release the activated position of a stop pin 3 according to Fig. 8 is the stopper 2 to move a total. And in a direction that runs counter to the direction of depression of the stop pin, or in the insertion direction of an inserted cable end. In such a release movement of the central support pin 9 of the stop member 2 remains due to the aforementioned Screw connection with the crimping tool 1 fixed. The housing 10 of the stop member 2 is therefore moved relative to the pin 9, while compressing the compression spring 11 which acts between the housing 10 and the stop pin 3. The compression spring 11 is a helical spring which surrounds the stopper pin 3 over part of its axial length.

In the course of this movement, the support pin 9 in the region of an enlarged pin head 12 passes through a central region of the support spring 6. Due to the cone-like design of the pin head 12 occurs in this enforcement an expansion of the support spring 6, since the pin head 12 respectively on the radially inner pin contact areas 13th the retaining spring 6 acts and this seeks to push radially outward.

Since, in the following, the retaining spring 6 is accommodated overall in the housing 10, which also includes an upper housing part 14, the radial movement of the retaining spring 6 and, in particular, of the action areas 7 is limited in the exemplary embodiment by a retaining wall 15. There is therefore a spreading movement in the region of the holding part 7, whereby the holding force on a stopper pin 3 so far decreases that the compression spring 5 is stronger and the retaining pin 9 in the position according to Fig. 7 , the unactivated position, pushes back.

In this case, since the stop member 2 is raised overall, relative to an outer surface of the crimping tool 1, with the exception of the central pin 9, it can also be rotated at the same time such that another stopper pin 3 comes into register with the through hole of the crimping tool.

Apparently, the interaction between the support pin 9 and the support spring 6 is radially offset from the interaction between the Support spring 6 and a stopper pin 3, namely radially inwardly in this regard.

The support spring 6 is as out Fig. 6 also visible, integrally formed. You could basically be designed in several parts.

Specifically, the support spring consists of a plurality of loop-like regions corresponding in number to preferably the number of stop pins 3. The loop-like regions are preferably formed radially on the inside, to form the interaction region 7, each with a circular segment-shaped section running concave from radially inward. These sections are preferably not formed contiguously. They are further preferably formed so that they would give a continuous line / closed circle or continuation of their extension. In addition, these sections preferably go over the corner area radially outward into extending legs. The legs are preferably slightly divergent. These legs preferably merge into a circular segment-shaped radially outer arc section, which forms the already mentioned mounting region 7. At the transition of the preferably diverging legs in the radially outer arc region a preferably Y-shaped splitting is given, which forms the connection to the neighboring spring element or nachbarschlaufenartigen area. This via a preferred outer sheet guide, which approximately simulates the radially outer circle in which the spring is arranged. Here, the transition is further preferably formed relief loop-like.

The concave inner arcuate portions preferably extend along a line, more preferably a circular line, which is preferably adapted to the outer dimension of the retaining pin 9, but, in order to achieve the effect described, is smaller than the outer dimension of the retaining pin 9 in its head region which he expands due to the cone part. On the other hand, the mentioned circle or the mentioned line is greater than the outer diameter of the support pin 9, namely the extent of the compression spring 11, which still extends in the assembled state within said circle.

With particular reference to the FIGS. 7 and 8th It can be seen that a stop pin 3 has inside a stop body 16 which is limited longitudinally displaceable in the stopper pin 3 designed largely cylindrical inside. In particular, the stopper body 16 in the stop direction, ie in the direction of the gripping end formed by the gripping part 21 of a stop pin 3, elastically evasive.

The stopper body 16 itself is in turn hollow or designed with a receiving opening, so that a wire end or the like can enter into this. Next, the stopper body 16 has a cylindrical guide portion 22, with which it leads to the cylindrical inner surface of the stop pin 3. This guide body 22 is in the direction of said gripping end, ie in the stop direction, in a thinner neck region 23, which passes through a relative to said cylinder portion diameter-reduced bore 24 which is formed in the stopper pin 3 passes. This is followed by a again slightly larger diameter range, a stopper body 17 at. The radial projection of the stopper body 17 over the neck region 23 forms a stop shoulder 19 with which the stopper body head rests on the bore 24 having formed in the interior of the stop pin 3 counter-stop.

On the said stopper body 17 acts as a compression spring formed spring member 18, the stop body 16 in the uninfluenced state by means of the stopper body head 17 against said counter-stop 20 presses and thus defines the furthest in the direction opposite to the gripping end moved position of the stopper body 16.

The spring member 18 is supported on the stopper pin 3 itself, namely in the embodiment by means of a gripping end of the stopper pin 3 forming gripping member 21. The gripping member 21 is formed like a plug, although it is also a metal part. By means of a collar 25 it sits on an end face of said cylindrical body, which forms the stop pin 3, on. It is radially over easily.

By means of a shank region 26, the gripping part 21 engages in said cylindrical body forming the abutment pin 3.

All disclosed features are essential to the invention. The disclosure of the associated / attached priority documents (copy of the prior application) is hereby also incorporated in full in the disclosure of the application, also for the purpose of including features of these documents in claims of the present application.

Claims (14)

Crimping tool (1) with Crimpstößeln and a through hole for insertion of a cable end to be crimped, wherein the insertion of the cable end by an adjustable, with the crimping tool (1) fixedly connected, but preferably operationally releasable stop member (2) is limited, wherein further the stopper part (2 ) has different stop pins (3) which are selectively activated by depressing and to be solved when selecting another stop pin (3) held under bias in its non-activated position activated stop pin (3) from the stop position, characterized in that a stop pin (3) has a stopper body (16) and that the stopper body (16) in the stopper pin (3) is elastically evasive held in the stop direction. Crimping pliers (1) according to the features of the preamble of claim 1 or claim 1, characterized in that the activated stop pin (3) is held by a spring catch formed by a retaining spring (6) and the solid locking by a release movement of the stop member (2) can be canceled. Crimping tool according to one or more of the preceding claims or in particular according thereto, characterized in that the release movement of the stop member (2) in the extension direction of the inserted cable end can be carried out. Crimping tool according to one or more of the preceding claims or in particular according thereto, characterized in that the stop member (2) is to be moved in the release movement against a spring bias. Crimping tool according to one or more of the preceding claims or in particular according thereto, characterized in that in the course of the releasing movement, the holding spring (6) can be spread apart to cancel the spring catch. Crimping tool according to one or more of the preceding claims or in particular according thereto, characterized in that the support spring (6) extends in a direction transverse to the release movement plane. Crimping tool according to one or more of the preceding claims or in particular according thereto, characterized in that the stop member (2) has a retaining pin (9), via which it is connected to the crimping tool and that the spreading by a cooperation between the retaining pin (9) and the support spring (6) takes place. Crimping tool according to one or more of the preceding claims or in particular according thereto, characterized in that the interaction between the retaining pin (9) and the retaining spring (6) in the stop member (2) radially offset from the latching action of the retaining spring (6) with the activated stop pin (3). Crimping tool according to one or more of the preceding claims or in particular according thereto, characterized in that the cooperation with the retaining pin (9) is radially inwardly with respect to the cooperation with the stop pin (3). Crimping tool according to one or more of the preceding claims or in particular according thereto, characterized in that a single holder spring (6) is provided for all stop pins (3) of the stop member (2). Crimping tool according to one or more of the preceding claims or in particular according thereto, characterized in that the stop body (16) has a stop body head (17) and that the stop body head (17) cooperates with a spring part (18). Crimping tool according to one or more of the preceding claims or in particular according thereto, characterized in that the stopper body head (17) forms a stop shoulder (19) which is in a counter-stop (20) in the direction opposite the stop direction with a stopper (3) formed in the interior of the stop pin (3). interacts. Crimping tool according to one or more of the preceding claims or in particular according thereto, characterized in that the stopper pin (3) has a gripping end. Crimping tool according to one or more of the preceding claims or in particular according thereto, characterized in that the gripping end is formed by a gripping part (21) located in the stopper pin (3).

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