WO2013175247A1

WO2013175247A1 - Crimping mandrels for crimping of cable connectors with rotating forming tools

Info

Publication number: WO2013175247A1
Application number: PCT/HR2013/000013
Authority: WO
Inventors: Bojan STANIĆ
Original assignee: Bex D.O.O.
Priority date: 2012-05-22
Filing date: 2013-05-21
Publication date: 2013-11-28
Also published as: HRP20120432A2; HRPK20120432B3

Abstract

This invention refers to crimping mandrels for crimping cable connectors with rotating forming tools, with which the uniform crimping of cable connectors is achieved. The crimping mandrels for crimping cable connectors consist of front 1 and rear 2 portions of housing, with the inside thereof consisting of a small handle 13, where the application of pressure thereon in the direction of the plastic handle 14 initiates a pulley mechanism via a left winch 11 and a right winch 12, an eccentric shaft 9 and a pusher shaft 16, whereby further translational movement of the lower rotating forming tool 5 achieves linear motion of the shaft 16 through the guide sleeve 25, which leads the front pusher 6 and the rear pusher 21. Both pushers 6 and 21 are situated on the sides of the lower rotating forming tool 5, and movement of the shaft of the lower rotating forming tool 24 toward the upper rotating forming tool 3, contact is established between the lower rotating forming tool 5 and the upper rotating forming tool 3. Another characteristic of the invention is that the lower rotating forming tool 5 and the upper rotating forming tool 3 have the possibility of rotating around the corresponding shaft of the lower rotating forming tool 24 and the corresponding shaft of the upper rotating forming tool 20 for the purpose of selecting a suitable profile that will crimp a specific connector.

Description

CRIMPING MANDRELS FOR CRIMPING OF CABLE CONNECTORS WITH

ROTATING FORMING TOOLS

DESCRIPTION OF THE INVENTION

The subject pertaining to the invention

This invention refers to crimping mandrels for crimping of cable connectors with rotating forming tools. This invention is categorized in the field of electrotechnology and is classified as H01R 43/042 - hand tools for crimping, i.e. H01R 43/058 - crimping mandrels in accordance with the International Patent Classification (IPC).

Technical problem

The essence of the technical problem, whereby the solution thereof is seeking patent protection, is that in respect to tools for the crimping of cable connectors where a very large number of such tools exist, taking into account that 200 different types of connectors (i.e. connector profiles) exist that must be connected at ducts' ends. Observation has shown that a universal tool does not exist that could be used on a large number of examples, as currently, one type of mandrels was exclusively specialized for crimping only a few connector profiles. Using this tool according to the subject invention finally enables the use of a virtually unlimited number of different forming tools for crimping connectors, as the use of interchangeable rotating forming tools is enabled, where by rotating each forming tool, an appropriate profile is selected that corresponds to a single use. The forming tool pairs are mutually interchangeable, depending on the specific type of profile or use, which results in one pair of universal mandrels with the ability to crimp over several hundred different profiles.

State of the art

Tools that are currently known and offered on the market for crimping cable connectors, tubes, coaxial and solar connectors, as well as fiber optics, and automobile connectors, operate according to the principle where various insert-plates are affixed on mandrels (mainly with screws and pins, and perhaps with standard insertion methods), so that one insert-plate is affixed on the moveable-pushing portion of the tool, and another on the stable portion. These inserts have partially profiled areas on one of their sides (in various implemented techniques, milling, grinding, wire erosion), and by movement of the pushing insert toward the stable insert, various connections are formed with those various profiles. The disadvantage of the mentioned systems is that 1-5 various profiles that actualize crimp profiles can be implemented on one insert-plate. For the possibility of actualizing several hundred various connections with one pair of mandrels, several hundred various insert-plates are likewise necessary, which is difficult to implement technically, i.e. a quick selection of appropriate inserts is very difficult among such a large number of inserts.

Another disadvantage of such existing mandrels is that more that 3-5 profiling areas cam ot be implemented on one insert, as the same crimping force cannot be used with all of the insert's profiles, since profiles located on the outer portion of the mandrels generate a lower pushing force than the profiles that are located closer the central rotational axis of the mandrels.

Both problems are completely avoided with the construction of the mandrels according to the subject invention, where the use of mutually interchangeable rotating forming tool pairs (on which 30 different profiles can be found) bypasses the vast number of various inserts, and one forming tool pair can cover all sizes of uniform (e.g. octagonal) profiles, thus facilitating selection and enabling an offer of a large number of forming tools in one set included with the mandrels.

The problem of attaining an equal application of pressure for each type of profile during use has been successfully avoided by actualizmg a linear movement of the lower rotating forming tool toward the uniform upper rotating foiming tool, where the necessary pressure is always actualized at the same location where two mutually coiTesponding profiles are positioned by the rotation of the forming tool.

Disclosure of the invention

The main objective of the invention is to provide crimping mandrels for crimping of cable connectors that enable the use of two rotating forming tools that have an octagonal shape, and that it is possible to form 8-24 various profiles on the mentioned sides, with which crimping up to 24 various cable connections is possible with only one set of rotating forming tools.

Another objective of the invention is the realization of an absolutely precise fit of the selected profile of the lower forming tool with the coiTesponding profile of the upper forming tool during use of the octagonally-shaped rotating forming tools, which does not execute any movement when applying pressure during the use of the mandrels.

Another objective of the invention is to enable the actualization of equal crimping forces of the connectors for each application of pressure on the mandrels, regardless of the position of the profiles on the rotating forming tool. An additional objective of the invention is to enable the replacement of the mentioned forming tools with a corresponding pair of forming tools with different profiles in order to enable the universal use of the mandrels for a virtually unlimited range of cable connectors.

An extra objective of the invention is to enable the creation of a pair of forming tools and the implemented profiles thereon, which are absolutely independent and can be defined by the user and additionally ordered from the manufacturer.

Another objective of the invention is that the stated corresponding pair of forming tools is available in an appropriate portable case included with the mandrels.

All other objectives and advantages of the invention shall partially be shown in the following description.

Actualizing the crimping of corresponding connectors is achieved by applying mild pressure to the shaft of the upper rotating forming tools of the mandrels, whereby the upper rotating forming tool is released, and with its rotation about its axis, the desired crimping profile for various connectors is adjusted. The lower rotating forming tool is adjusted in the same manner, which has profiles located on its rim corresponding to the upper rotating forming tool. From the top view, elements of the upper rotating forming tool and the lower rotating forming tool basically have an octogonally-shaped body, where corresponding profiles for crimping connectors are located on the rim thereof. Upon adjustment of corresponding profiles for foiToing cable connectors, by applying pressure to the handles toward the housing of the tool, a pulley mechanism is initiated via two winches, an eccentric shaft and a pusher shaft. The actualization of the contact pressure of the mandrels arises through the further translational movement of the lower rotating forming tool, which is achieved by linear movement of the shaft through the guide found on the front and rear portions of the housing and consequently the further linear movement of the pusher plate (shaped as half of an octagon) located on the sides of the lower rotating forming tool, and movement of the lower rotating forming tool's shaft toward the lower rotating forming tool. Further pressure applied on the small handle and movement of the lower rotating forming tool brings the aforementioned to the upper rotating forming tool, and the desired connection is realized when the stated lower rotating forming tool and upper rotating forming tool come in contact under a suitable application of force.

Brief description of the figures The enclosed figures that are included in the description and are constitute parts of the invention description, show the best manner of implementation of the invention, and assist in explaining the basic principles of the invention.

Figure 1 shows the assembly of the mandrels according to this invention, with all portions in their unassembled state

Figure 2 shows the spatial view of the assembly of the mandrels according to this invention Figure 3 shows the assembly of the mandrels according to this invention in a front view

Figure 4 shows the assembly of the mandrels according to this invention in a top view

Figure 5 shows the front view of the assembly of the mandrels according to this invention without the front portion of the housing in an unloaded position

Figure 6 shows the top view of the assembly of the mandrels according to this invention without the front portion of the housing in an unloaded position

Figure 7 shows the front view of the assembly of the mandrels according to this invention without the front portion of the housing in a loaded position

Figure 8 shows the top view of the assembly of the mandrels according to this invention without the front portion of the housing in a loaded position

Figure 9 shows an example of the upper and lower rotating forming tools when both forming tools have implemented profiles of an identical shape, in spatial, front and side views

Figure 10 shows an example of the lower rotating forming tool for profiles for automotive use, in spatial, front and side views

Figure 11 shows an example of the upper rotating forming tool for profiles for automotive use, in spatial, front and side views

Detailed description of at least one of the possible implementations of the invention

The mandrels for crimping cable connectors according to this invention consist of a front portion of a housing 1 and a rear portion of a housing 2 that are connected and fastened together with bolts 17, and functional elements are located inside both portions of the housing 1 and 2, which actualize the application of pressure on the mandrels.

The main elements that are used to cany out the selection of suitable profiles are the upper rotating forming tool 3 and the lower rotating forming tool 5. Both of the stated rotating forming tools 3 and 5 rotate around corresponding shafts— around the shaft of the upper rotating forming tool 20 and the shaft of the lower rotating fomiing tool 24, in order to allow the selection of corresponding profiles with which to crimp connectors. On its rim, the upper rotating forming tool 3 has implemented profiles for crimping connectors, whose selection thereof is adjusted by rotation about the shaft of the upper rotating forming tool 20 and selection of the desired profile. The appropriate profile is likewise adjusted on the lower rotating forming tool 5, on which corresponding opposite profiles are likewise found. Both of the stated rotating forming tools 3 and 5 are interchangeable, in order to enable the use of various types of forming tools, i.e. forming tools that enable the crimping of various connector profiles.

The lower rotating forming tool shaft 24 positions the lower rotating forming tool 5 between the front 1 and rear 2 portions of the housing and enables rotation about its axis. The shaft of the lower rotating forming tool 24 is fastened to the housing with a socketed screw 23, which secures the washer plate 22 that is connected to the shaft of the lower rotating forming tool 24. Applying pressure to the plate moves the shaft 24 and the lower safety washer 18, and rotation of the lower rotating forming tool 5 is enabled. By movement of the safety washer 18 from the rear side of the mandrels, the stated washer moves toward the front and enables the rotation of the lower forming tool 5. Upon the adjustment of the forming tool in the desired position, the washer is pushed back in its initial position by the spring 19 and secures the forming tool 5. The spring 19 ensures the return of the shaft of the lower rotating forming tool 24 and secures the mentioned rotating forming tool 5. The elastic pin 7 secures the handle's spring.

The rotation of the upper rotating forming tool is foreseen in an identical manner, where the shaft of the upper rotating forming tool 20 positions the upper rotating forming tool 3 between the front 1 and rear 2 portions of the housing and enables rotation about its axis. The shaft of the upper rotating forming tool 20 is likewise fastened to the housing with a socketed screw 23, which secures the washer plate 22 that is connected to the shaft of the lower rotating forming tool 24. Applying pressure to the plate moves the shaft 24 and the lower safety washer 18, and rotation of the upper rotating forming tool 3 is enabled. Movement of the safety washer 18 from the rear side of the mandrels, the stated washer moves toward the front and enables the rotation of the upper forming tool 3. Upon the adjustment of the forming tool in the desired position, the washer is pushed back in its initial position by the spring 19 and secures the forming tool 3. The spring 19 ensures the return of the shaft of the upper forming tool 20 and secures the mentioned upper forming tool 3.

When applying pressure to the mandrels, the lower rotating forming tool 5 approaches the upper rotating forming tool 3 until the actualization of the final pressure on the cable connector, which is formed according to the selected profile on the upper secured rotating forming tool 3 and lower rotating forming tool 5. The upper rotating forming tool 3 can only be rotated to adjust and select a corresponding profile, and does not execute any type of linear motion. Applying pressure to the small handle 13 toward the handle on the housing of the tool, a pulley mechanism is initiated via the left winch 11 and the right winch 12, the eccentric shaft 9 and the pusher shaft 16. The left winch 11 and the right winch 12 regulate the expansion degree of the mandrels. The left winch 11 and the right winch 12 are affixed on the small handle 13 and enable the opening of the mandrels' handles. Each winch 11 and 12 has approximately 10 slots that gradually open and enable the precise and controlled connection of the selected connector. A plastic handle 14 is located on the small handle, which has an ergonomic shape and enables the facilitated handling of the mandrels and crimping of the connectors.

The desired pretension of the mandrels is regulated by the rotating plate 10 by adjusting the socketed screw (8). By releasing the eccentric shaft 9, the pretension of the mandrels is regulated and the desired position of the rotating plate 10 is adjusted. Selecting a specific pretension regulates the pushing force of the lower rotating forming tool 5 toward the connector and the upper rotating forming tool 3.

With further application of pressure on the small handle, further translational movement of the lower rotating fomiing tool 5 is achieved with the linear movement of the pusher shaft 16 through the guide sleeve 25, which leads the front pusher 6 and the rear pusher 21. The front and rear pushers 6 and 21 propel the lower rotating forming tool with a pulley mechanism and ensure the linear motion of the lower forming tool 5. The pusher shaft 16 represents the connection of the pusher and the small handle 13 and transmits the pushing force from the small handle 13 to the front pusher 6 and the rear pusher 21. A Seeger ring 15 is foreseen to secure the pusher shaft 16. The mentioned front and rear pushers 6 and 21 are positioned on the sides of the lower rotating forming tool, and moving the shaft of the lower rotating forming tool 24 toward the upper rotating tool 3, contact is established between the lower rotating forming tool 5 and the upper rotating forming tool 3 and consequentially, the actualization of an appropriate load on the contact connector, which in this manner is securely connected to the cable.

Specialists from tins field will find it obvious that many modifications and alterations can be made to the mandrels for the crimping of cable connectors according to this invention, without abandoning the extent and essence of the invention. List of positions used

1. Front portion of the housing

2. Rear portion of the housing

3. Upper rotating forming tool

4. Socketed screw

5. Lower rotating forming tool

6. Front pusher

7. Elastic pin

8. Socketed screw

9. Eccentric shaft

10. Rotating plate

1 1. Left winch

12. Right winch

13. Small handle

14. Plastic handle

15. Seeger ring

16. Pusher shaft

17. Bolt

18. Safety washer

19. Spring

20. Upper rotating fomiing tool shaft

21. Rear pusher

22. Washer plate

23. Socketed screw with depressed head

24. Lower rotating forming tool shaft

25. Guide sleeve

Claims

Patent claims

1. The crimping mandrels for crimping cable connectors, which consist of front (1) and rear (2) portions of housing, with the inside thereof consisting of a small handle (13), where the application of pressure thereon in the direction of the plastic handle (14) initiates a pulley mechanism via a left winch (11) and a right winch (12), an eccentric shaft (9) and a pusher shaft (16), are characterized wherein

- the further translational movement of the lower rotating forming tool (5) achieves linear motion of the shaft (16) through the guide sleeve (25), which leads the front pusher (6) and the rear pusher (21), which are situated on the sides of the lower rotating forming tool, and movement of the shaft of the lower rotating forming tool (24) toward the upper rotating forming tool (3), contact is established between the lower rotating forming tool (5) and the upper rotating forming tool (3),

- the lower rotating forming tool (5) and the upper rotating forming tool (3) have the possibility of rotating around the corresponding shaft of the lower rotating forming tool (24) and the coiTesponding shaft of the upper rotating forming tool (20) for the purpose of selecting a suitable profile.

2. The crimping mandrels for crimping cable connectors according to patent claim 1, are characterized wherein the lower rotating forming tool (5) and the upper rotating forming tool (3) are octogonally-shaped for the purpose of actualizing a precise fit of the lower rotating forming tool (5) and upper rotating forming tool (3).

3. The crimping mandrels for crimpmg cable connectors according to any of the claims, are characterized wherein within the tool set that includes the mandrels, at least one pair of corresponding rotating forming tools is included - a lower forming tool (5) and an upper forming tool (3), and favorably a larger number of pairs of coiTesponding forming tools (5) and (3).