Terminal crimping mechanism

Abstract

The utility model discloses a terminal crimping mechanism which comprises a support, a crimping assembly and a driving assembly, the crimping assembly is fixed on the support and comprises a crimping die provided with a working groove, and a push rod and two tooth-shaped dies which can move in the working groove, two tooth rows which are arranged in a staggered mode and form a certain angle are arranged on each tooth-shaped die in a protruding and extending mode, the two tooth-shaped dies can be tightly buckled, a terminal crimping space is formed between the tooth rows, and the push rod is connected with the two tooth-shaped dies and drives the two tooth-shaped dies to be close to each other and buckled with each other, so that a terminal is crimped on a wire; the driving assembly is fixed to the support, acts on the push rod and drives the push rod to move. According to the terminal crimping mechanism, the tooth-shaped die is used for fixing and crimping the terminal, the terminal is supported and fixed by a plurality of teeth, and the stress is consistent during crimping, so that the crimping effect is better, and the situation that the crimping is not in place due to gaps is not easy to occur.

Description

Technical Field

[0001] The utility model belongs to the technical field of electrical equipment, and in particular relates to a terminal crimping mechanism. Background Art

[0002] Terminals are commonly used components in electrical connections. In electrical engineering, terminals mostly refer to wiring terminals, also called wiring terminals. They can be divided into single-hole, double-hole, socket, hook, etc. by type, and can be divided into copper-plated silver, copper-plated zinc, copper, aluminum, iron, etc. by material. Their main function is to transmit electrical signals or conduct electricity. Terminals must be used when signal lines are connected to other devices, otherwise the signal lines cannot be connected to other devices or communication connections. The terminal crimping machine uses a crimping tool to fix the terminal to be installed and the signal line, and then applies extrusion force to the terminal to be installed, so that the terminal to be installed is tightly sleeved on the end of the signal line. During the working process, the insulation layer on the wire needs to be stripped first, and then the terminal is crimped onto the exposed wire bundle. At present, the common crimping mechanism cannot fix the terminal completely on the wire bundle well. There will be a gap between the terminal and the wire bundle, which affects the later fixing effect and use effect.

[0003] Therefore, in view of the above technical problems, it is necessary to provide an improved terminal crimping mechanism to solve the above problems.

[0004] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Utility Model Content

[0005] The utility model aims to provide a terminal crimping mechanism, which can better fix the terminal on the wire harness to avoid the terminal falling off or poor contact affecting the use effect.

[0006] In order to achieve the above purpose, the technical solution provided by a specific embodiment of the utility model is as follows:

[0007] The utility model provides a terminal crimping mechanism, comprising a bracket, a crimping assembly and a driving assembly, wherein the crimping assembly is fixed on the bracket and comprises a crimping die with a working groove, a push rod and two toothed dies that can move in the working groove, each of the toothed dies is respectively protruded with two tooth rows that are staggered and at a certain angle, and the two toothed dies can be tightly buckled, and a terminal crimping space is formed between the tooth rows, the push rod connects and drives the two toothed dies to approach and buckle each other, so as to crimp the terminal onto the wire; the driving assembly is fixed on the bracket, and the driving assembly acts on the push rod and drives the push rod to move.

[0008] In one or more embodiments of the present invention, the crimping assembly also includes two wedge blocks located in the working groove and arranged opposite to each other, the two toothed dies are respectively fixed to the two wedge blocks, and the other sides of the wedge blocks are respectively formed with inclined first guide surfaces, and the push rod includes two driving arms respectively extending between the wedge blocks and the side walls of the working groove, and each of the driving arms is respectively formed with a second guide surface matching the first guide surface on that side.

[0009] In one or more embodiments of the present invention, at least one return spring is squeezed between the two wedge blocks.

[0010] In one or more embodiments of the present invention, the angle between the two tooth rows is 90 degrees.

[0011] In one or more embodiments of the present invention, the driving assembly includes a pre-crimping cylinder connected to the push rod, and the pre-crimping cylinder drives the push rod to move and drives the two toothed dies to approach each other to fix the terminal.

[0012] In one or more embodiments of the present invention, the driving assembly further comprises a main cylinder, which can drive the push rod to move and drive the two toothed dies to continue to approach so as to crimp the terminal onto the wire.

[0013] In one or more embodiments of the present invention, a sensor for obtaining pressure data when crimping terminals is fixed on the output shaft of the master cylinder.

[0014] In one or more embodiments of the present invention, the crimping assembly also includes a fixed plate fixed to the crimping die, the fixed plate covers the working groove to limit the two wedge blocks and the two toothed dies in the working groove, and a first guide hole coaxial with the terminal crimping space is provided on the fixed plate.

[0015] In one or more embodiments of the present invention, the terminal crimping mechanism also includes a terminal guide assembly fixed on the crimping die, the terminal guide assembly includes a second guide hole coaxial with the first guide hole, and the aperture of the second guide hole gradually increases in a direction away from the terminal crimping space.

[0016] In one or more embodiments of the present utility model, the terminal guide assembly includes a guide base, a guide cylinder fixed to the guide base, and two guide arms pivotally arranged on the guide base, the guide base is fixed to the crimping die, the ends of the two guide arms are respectively provided with semicircular guide grooves, the guide cylinder connects and drives the two guide arms to rotate to approach or move away from each other, and when the two guide arms rotate close to each other, the two guide grooves constitute the second guide hole.

[0017] Compared with the prior art, the terminal crimping mechanism in the utility model uses a toothed die to perform terminal fixing and crimping operations. Each toothed die has multiple teeth arranged in parallel. The terminal is supported and fixed by multiple teeth. The force is consistent during crimping, so the crimping effect is better, and it is not easy to have gaps that lead to inadequate crimping. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a schematic diagram of a terminal crimping mechanism in one embodiment of the utility model;

[0020] Figure 2 This is a disassembled diagram of a terminal crimping mechanism in one embodiment of the utility model;

[0021] Figure 3 This is a disassembly diagram of a crimping assembly in one embodiment of the utility model;

[0022] Figure 4 This is a schematic diagram of the interior of a crimping assembly in one embodiment of the utility model;

[0023] Figure 5 A schematic diagram of a crimping die in one embodiment of the utility model;

[0024] Figure 6 This is a schematic diagram of a push rod in one embodiment of the utility model;

[0025] Figure 7 A schematic diagram of a wedge block in one embodiment of the utility model;

[0026] Figure 8 A schematic diagram of a toothed mold in one embodiment of the utility model;

[0027] Fig. 9 This is a schematic diagram of a first state of a terminal guide assembly in an embodiment of the utility model;

[0028] Fig.10 It is a schematic diagram of the second state of the terminal guide assembly in one embodiment of the utility model.

[0029] Description of main reference numerals:

[0030] 100-terminal crimping mechanism, 10-bracket, 20-crimping assembly, 21-crimping die, 211-working groove, 212-block, 22-push rod, 221-driving block, 222-base, 2221-mounting hole, 223-main rod, 2211-second guide surface, 23-toothed die, 231-tooth row, 2311-tooth, 2312-gap, 24-wedge block, 241-first guide surface, 25-reset spring, 26-fixed plate, 261-first guide hole, 262-slide groove, 30-driving assembly, 31-pre-crimping cylinder, 32-main cylinder, 33-sensor, 40-guide assembly, 41-guide base, 42-guide cylinder, 43-guide arm, 44-auxiliary connecting block, 441-guide groove, 45-second guide hole. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0032] like Figure 1-10 As shown, the terminal crimping mechanism 100 in one embodiment of the utility model comprises a bracket 10, a crimping assembly 20 and a driving assembly 30. The bracket 10 is used to provide a fixed position for the crimping assembly 20 and the driving assembly 30. The crimping assembly 20 is fixed on the bracket 10, and comprises a crimping die 21, a push rod 22 and a toothed die 23. The crimping die 21 is provided with a working groove 211, and the push rod 22 and the toothed die 23 are arranged in the working groove 211 and are movable. The two toothed dies 23 are arranged opposite to each other, and each toothed die 23 is respectively provided with two tooth rows 231, each tooth row 231 is composed of a plurality of teeth 2311, and a gap 2312 is formed between adjacent teeth 2311. The two tooth rows 231 form a certain angle with each other and can be interlocked (i.e., the teeth 2311 in one tooth row 231 can be inserted into the gap 2312 in the other tooth row 231). When interlocked, the angle between the two tooth rows 2312 is the terminal crimping space. The driving assembly 30 is used to provide power to push the push rod 22 to move in the working groove 211. The push rod 22 drives the tooth-shaped mold 23 to approach each other, so that the tooth rows 231 are interlocked, and the terminal crimping space between the tooth rows 231 is reduced to fix the terminal on the exposed wire.

[0033] In actual operation, after the outer insulation layer of the wire is stripped, the internal wire bundle is exposed and twisted into a single strand, and then the exposed wire bundle is transferred to the terminal crimping space between the two tooth rows 231, and the tooth-shaped molds 23 are driven to approach each other, and the tooth rows 231 are interlocked with each other to fix the terminal on the exposed wire bundle. Since two tooth-shaped molds 23 that can interlock with each other are used, each tooth-shaped mold 23 has two tooth rows 231 at a certain angle, and each tooth row 231 has a plurality of teeth 2311, and each tooth 2311 contacts the terminal and provides a force, the crimping length is longer, and contact points and forces can be provided at all positions of the terminal, so that the terminal is fixed on the wire bundle as a whole, avoiding the problem that the short fixed position affects the fixing effect and causes easy falling off in the later stage. At the same time, a large number of teeth 2311 can crimp terminals of different lengths, which is more flexible.

[0034] like Figure 4 As shown, the crimping assembly 20 also includes two wedge blocks 24 disposed in the working groove 211 and movable, and two toothed dies 23 are respectively fixed to the two wedge blocks 24, and each wedge block 24 is formed with an inclined first guide surface 241 on one side facing the inner wall of the working groove 211. At the same time, the push rod 22 includes two driving blocks 221 extending between the wedge blocks 24 on both sides and the inner wall of the working groove 211, and each driving block 221 is respectively formed with a second guide surface 2211 that matches the first guide surface 241 on that side. When the push rod 22 moves, under the cooperation of the second guide surface 2211 and the first guide surface 241, the two wedge blocks 24 drive the two toothed dies 23 to approach each other to complete the terminal crimping operation.

[0035] It is conceivable that a reset function needs to be provided for the crimping assembly 20 so as to reset after a single terminal crimping operation is completed and release the wire to wait for the next crimping operation. In this embodiment, a reset spring 25 is squeezed between the two wedge blocks 24. During the terminal crimping process, the reset spring 25 squeezes and stores energy, and then the driving force of the driving assembly 30 disappears, and the reset spring 25 releases the stored energy and pushes the two wedge blocks 24 to both sides, so that the two tooth-shaped dies 23 are away from each other.

[0036] Preferably, two return springs 25 are provided in the working groove 211, which are respectively pressed on both sides of the toothed mold 23 to provide return driving force from both sides to avoid the toothed mold 23 being stuck due to unilateral driving force.

[0037] In this embodiment, the angle between the two tooth rows 231 on a single toothed die 23 is 90 degrees. Therefore, after being buckled, the cross-sectional shape of the terminal crimping space between the two toothed dies 23 is rectangular, so the terminal is more evenly stressed and the fixing effect is better.

[0038] like Figure 1 and 2As shown, the drive assembly 30 includes a pre-crimping cylinder 31 and a main cylinder 32, both of which are fixed on the bracket 10, wherein the pre-crimping cylinder 31 is used to drive the wedge block 24 to move and fix the terminal between the two tooth-shaped dies 23, and then the main cylinder 32 is started and pushes the push rod 22 to move further to crimp the terminal on the wire harness. Therefore, the terminal crimping mechanism 100 in this embodiment has a two-stage fixing operation, that is, the terminal is fixed first, the wire harness is inserted into the terminal, and then the terminal is crimped and fixed.

[0039] Preferably, a sensor 33 is also fixed at the end of the output shaft of the master cylinder 32, which is used to obtain pressure data when crimping the terminal. The output of the master cylinder 32 can be adjusted at any time through the pressure data and the terminal crimping effect to achieve the optimal crimping effect, so it has high flexibility.

[0040] To match the above settings, refer to Figure 4 and 6 The push rod 22 includes a base 222, and two driving blocks 221 are fixed on both sides of the base 222. A main rod 223 is also fixed on the base 222, and the main cylinder 32 acts on the end of the main rod 223 to push the entire push rod 22 to move. It should be noted that since the output shaft of the main cylinder 32 is fixed with a sensor 33, the main rod 223 and the main cylinder 32 are not fixedly connected, and the main rod 223 contacts the output shaft of the main cylinder 32 only when the push rod 22 is pushed to move. The base 222 is fixedly connected to the pre-pressing cylinder 31, so a mounting hole 2221 for fixing the pre-pressing cylinder 31 is provided on the base 222.

[0041] like Figure 3 As shown, the main rod 223 and the mounting hole 2221 are arranged up and down. In order to ensure that the thickness of the crimping die 21 is not too large, a slide groove 262 is also opened on the fixed plate 26 at one end. The base 222 where the mounting hole 2221 is located is partially exposed in the slide groove 262 and can move within the range of the slide groove 262.

[0042] Preferably, a stopper 212 is provided in the working groove 211, which is located between the base 222 and the wedge block 24, and is used to provide space division and limiting functions, so as to limit the wedge block 24, the return spring 25 and the toothed die 23 on one side of the working groove 211, so as to ensure the moving direction of the wedge block 24, the return spring 25 and the toothed die 23, and the other side of the stopper 212 is the moving space of the main rod 223 and the base 222. Since the crimping die 21 is an open design, there is no shielding at both ends of the working groove 211. In order to prevent foreign matter from entering and to avoid the wedge block 24, the return spring 25, etc. from detaching, a fixing plate 26 is fixed at both ends of the crimping die 21, which covers the working groove 211, and a first guide hole 261 is opened on the fixing plate 26, which is coaxial with the terminal crimping space between the toothed die 23, so as to allow the wire to pass through.

[0043] Since the wire is soft, it may be deformed after stripping and twisting, and cannot enter the crimping assembly 20. Therefore, in this embodiment, the terminal crimping mechanism 100 also includes a guide assembly 40, which includes a second guide hole coaxial with the first guide hole 261, and the diameter of the second guide hole gradually increases in the direction away from the first guide hole 261, so the second guide hole is a diffuse funnel-shaped opening, which can smoothly guide the wire into the first guide hole 261 and the toothed die 23.

[0044] Specifically, the guide assembly 40 is arranged on one side of the first guide hole 261, and includes a guide base 41, a guide cylinder 42, and two guide arms 43. The guide base 41 is fixed on the crimping die 21, the guide cylinder 42 is fixed on one end of the guide base 41, and the two guide arms 43 are pivotally arranged on the other end of the guide base 41. Both are connected to the output shaft of the guide cylinder 42 and can be driven to rotate. The two guide arms 43 are respectively fixed to the two corners of the guide base 41, and auxiliary connecting blocks 44 are respectively fixed on the two guide arms 43. Semicircular guide grooves 441 are respectively arranged at the ends of the two auxiliary connecting blocks 44. When the two guide arms 43 rotate and approach each other, the two guide grooves 441 are combined to form a second guide hole 45.

[0045] In the specific processing process, the guide assembly 40 has two states: a first state (initial state) and a second state (guide state). When in the first state, the two guide arms 43 are in an "open" state ( Fig. 9 As shown). When the wire approaches and needs to enter between the toothed dies 23 for crimping, the guide arms 43 rotate toward each other and approach, and then the two semicircular guide grooves 441 are combined to form a conical second guide hole 45. At this time, the guide assembly 40 is in the second state ( Fig.10 As shown), it provides a guiding effect for the wire; when the wire successfully enters between the toothed molds 23, the guide assembly 40 completes the guiding effect, and the two guide arms 43 rotate and open in opposite directions on both sides to avoid affecting the subsequent movement of the wire. The guide assembly 40 re-enters the first state, waits for the terminal crimping to be completed, and then disengages and waits for the next round of terminal crimping operation.

[0046] Since the second guide hole 45 is formed by merging two semicircles opened on the auxiliary connection block 44, and the auxiliary connection block 44 and the guide arm 43 are detachably fixed, when processing wires of different diameters, the auxiliary connection block 44 with guide grooves 431 of different sizes can be replaced to improve flexibility.

[0047] The terminal crimping mechanism 100 provided by the utility model is further described below in conjunction with specific usage scenarios. Before the wire approaches, the guide assembly 40 is in the first state (initial state), and at the same time, the pre-crimping cylinder 31 drives the push rod 22 to move, and the terminal is fixed between the toothed mold 23; after the wire approaches, the guide cylinder 42 drives the two guide arms 43 to rotate and approach, and the two semicircular guide grooves 441 are combined to form a conical second guide hole 45. After the wire passes through the second guide hole 45 and the first guide hole 261, it enters the terminal, and the guide cylinder 42 drives the guide arm 43 to rotate and open, the main cylinder 32 contacts and pushes the main rod 223 to move, and the toothed mold 23 squeezes and fixes the terminal on the wire. Then the main cylinder 32 retreats, the wedge block 24 is reset under the action of the reset spring 25, and the supporting force of the toothed mold 23 on the terminal disappears. At this time, the wire fixed with the terminal can be removed.

[0048] The terminal crimping mechanism 100 in the utility model uses a toothed die 23 to fix and crimp the terminal, which has a longer fixed depth and can meet the crimping requirements of terminals of different lengths; the angle between the tooth rows 231 is 90 degrees, which is roughly the same as the force between the contact points between the terminals, so the shape of the terminal after crimping is relatively regular and the crimping effect is better; the guide component 40 can provide a guiding effect for the wire and restore the initial state after the guiding effect ends to avoid affecting the removal of the wire.

[0049] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0050] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A terminal crimping mechanism, characterized in that: include: Bracket; A crimping assembly is fixed on the bracket, comprising a crimping die with a working groove, a push rod and two tooth-shaped dies that can move in the working groove, each of the tooth-shaped dies protruding with two staggered and angled tooth rows, and the two tooth-shaped dies can be tightly buckled to form a terminal crimping space between the tooth rows, and the push rod connects and drives the two tooth-shaped dies to approach each other and buckle, so as to crimp the terminal onto the wire; A driving assembly is fixed on the bracket, and the driving assembly acts on the push rod and drives the push rod to move.

2. The terminal crimping mechanism according to claim 1, characterized in that: The crimping assembly also includes two wedge blocks located in the working groove and arranged opposite to each other, the two toothed dies are respectively fixed to the two wedge blocks, and the other sides of the wedge blocks are respectively formed with inclined first guide surfaces, and the push rod includes two driving arms respectively extending between the wedge blocks and the side walls of the working groove, and each of the driving arms is respectively formed with a second guide surface that matches the first guide surface on the same side.

3. The terminal crimping mechanism according to claim 2, characterized in that: At least one return spring is squeezed between the two wedge blocks.

4. The terminal crimping mechanism according to claim 1, characterized in that: The angle between the two toothed rows is 90 degrees.

5. The terminal crimping mechanism according to claim 1, characterized in that: The driving assembly comprises a pre-crimping cylinder connected to the push rod, and the pre-crimping cylinder drives the push rod to move and drives the two tooth-shaped dies to approach each other to fix the terminal.

6. The terminal crimping mechanism according to claim 5, characterized in that: The driving assembly also includes a main cylinder, which can drive the push rod to move and drive the two toothed dies to continue to approach so as to crimp the terminal onto the wire.

7. The terminal crimping mechanism according to claim 6, characterized in that: A sensor for obtaining pressure data when crimping terminals is fixed on the output shaft of the main cylinder.

8. The terminal crimping mechanism according to claim 2, characterized in that: The crimping assembly also includes a fixing plate fixed to the crimping die, the fixing plate covers the working groove to limit the two wedge blocks and the two toothed dies in the working groove, and a first guide hole coaxial with the terminal crimping space is opened on the fixing plate.

9. The terminal crimping mechanism according to claim 8, characterized in that: It also includes a terminal guide assembly fixed on the crimping die, the terminal guide assembly includes a second guide hole coaxial with the first guide hole, and the aperture of the second guide hole gradually increases in a direction away from the terminal crimping space.

10. The terminal crimping mechanism according to claim 9, characterized in that: The terminal guide assembly includes a guide base, a guide cylinder fixed to the guide base, and two guide arms pivotally arranged on the guide base, wherein the guide base is fixed to the crimping die, and the ends of the two guide arms are respectively provided with semicircular guide grooves, and the guide cylinder connects and drives the two guide arms to rotate so as to approach or move away from each other. When the two guide arms rotate close to each other, the two guide grooves constitute the second guide hole.

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