Crimping pliers

Abstract

The embodiment of the utility model provides a pair of crimping pliers, which comprises a first plier body and a second plier body which are hinged with each other, one end of the first plier body is provided with a jaw used for accommodating different signal crimping terminals in a matching manner, one end of the second plier body is provided with a press-fit bump corresponding to each jaw, and the opposite end of the second plier body extends to form a fixed handle. The movable handle is pivoted to the tail end of the first plier body; two ends of the connecting piece are respectively pivoted with the movable handle and the fixed handle; the adjusting assembly is used for adjusting the limit pressing position of the movable handle; the adjusting assembly comprises an eccentric shaft used for being connected with the movable handle and the first clamp body in a pivoted mode and an adjusting knob arranged at the tail end of the eccentric shaft in a sleeving mode. The adjusting knob is screwed so that the movable handle can eccentrically rotate relative to the first clamp body, and then the limit pressing position of the movable handle can be relatively close to or away from the fixed handle. According to the embodiment of the utility model, the limit pressing position of the movable handle is adjusted through the adjusting assembly so as to adjust the tightness of the pressing operation of the crimping pliers.

Description

Technical Field

[0001] The embodiment of the utility model relates to the technical field of electric tools, and in particular to a wire crimping pliers. Background Art

[0002] Crimping pliers are usually used to assist electricians in crimping and fixing wires and crimping terminals so as to perform wiring operations on the wires. An existing crimping pliers includes a first pliers body and a second pliers body, the middle parts of which are hinged to each other and the two ends are respectively configured to form a pliers mouth and a handle part, wherein, in order to adapt to different types of crimping terminals, one end of the first pliers body is provided with a jaw for adapting and accommodating different signal crimping terminals, and one end of the second pliers body is provided with a crimping protrusion corresponding to each of the jaws, and a fixed handle is extended from the opposite end. When in use, first place the crimping terminal in the corresponding jaw, then insert one end of the wire into the crimping terminal, and then press the handle part so that the crimping protrusion is pressed into the jaw to crimp the crimping terminal so that it is tightly clamped to fix the wire, thereby achieving a fixed connection between the wire and the crimping terminal.

[0003] To ensure that the crimping is in place, users usually press the handle to the limit position, which means that the crimping of the wire and the crimping terminal is completed. However, different crimping terminals can withstand different crimping forces. The tightness of the crimping of existing crimping pliers cannot be adjusted, which easily leads to over-crimping and damage to the crimping terminal or even the wire, resulting in a high rework rate and is not conducive to improving crimping efficiency. Utility Model Content

[0004] The technical problem to be solved by the embodiments of the utility model is to provide a wire crimping pliers capable of adjusting the tightness of the crimping operation of the wire crimping pliers.

[0005] In order to solve the above-mentioned technical problems, an embodiment of the utility model provides the following technical solutions: a wire crimping pliers, comprising a first pliers body and a second pliers body hinged to each other, one end of the first pliers body is provided with a jaw for adapting to and accommodating different signal crimping terminals, one end of the second pliers body is provided with a pressing protrusion corresponding to each jaw and a fixed handle extends from the opposite end, the wire crimping pliers also include a movable handle pivotally connected to the end of the first pliers body, connecting pieces pivotally connecting the movable handle and the fixed handle at both ends, and an adjusting component for adjusting the extreme pressing position of the movable handle, the adjusting component includes an eccentric shaft for pivotally connecting the movable handle and the first pliers body and an adjusting knob sleeved on the end of the eccentric shaft, turning the adjusting knob causes the movable handle to rotate eccentrically relative to the first pliers body so that the extreme pressing position of the movable handle is also relatively close to or away from the fixed handle.

[0006] Furthermore, the eccentric shaft includes a large diameter section and an eccentric section connected to one end of the large diameter section and the axis of which is offset relative to the large diameter section. The first caliper body is provided with a first pivot hole corresponding to the large diameter section, and the movable handle is provided with a second pivot hole corresponding to the eccentric section. The eccentric shaft is pivotally connected to the first caliper body and the movable handle by passing the large diameter section through the first pivot hole and the eccentric section through the second pivot hole.

[0007] Furthermore, an adjusting section coaxially extends from the axis center of the free end of the eccentric section, and the adjusting knob includes a knob main part which is sleeved on the outside of the adjusting section and fixed relative to the adjusting section in the circumferential direction.

[0008] Furthermore, the adjustment knob also includes a chassis fixed relative to the movable handle, and a plurality of teeth are circumferentially distributed on the chassis. A locking piece is provided on the side of the knob main part facing the chassis, and the locking piece is inserted into the corresponding teeth to relatively fix the knob main part.

[0009] Furthermore, the locking component includes a button and an elastic component, one side of the button is provided with a snap-on piece that corresponds to the tooth groove, and the side of the knob main component is provided with a mounting hole, the button is assembled in the mounting hole and the two ends of the elastic component are respectively abutted between the button and the wall of the mounting hole, the button is pushed by the elastic component so that the snap-on piece is stuck in the tooth groove to lock the knob main component, and pressing the button causes the elasticity of the elastic component to contract so that the snap-on piece withdraws from the notch of the tooth groove to unlock the knob main component.

[0010] Furthermore, a limit block protrudes from the button, and a limit hole is provided on the hole wall of the mounting hole away from one end of the clamping piece corresponding to the limit block. The button is assembled into the mounting hole and the limit block is pressed into the limit hole to limit the activity of the button.

[0011] Furthermore, the elastic member is a coil spring, the inner wall of the mounting hole correspondingly protrudes out of the mounting column, and the coil spring is correspondingly sleeved on the outer side of the mounting column and fixed between the button and the wall of the mounting hole.

[0012] Furthermore, an indicating cover plate is fixed to the outer end surface of the knob main component.

[0013] Furthermore, a rack is provided on the edge of the connecting piece, and the movable handle is also pivotally connected to a safety buckle with protruding teeth meshing with the rack at the edge.

[0014] After adopting the above technical scheme, the embodiment of the utility model has at least the following beneficial effects: the embodiment of the utility model pivotally connects the movable handle at the end of the first pliers body, and further provides a connecting piece to pivotally connect the movable handle and the fixed handle of the second pliers body at both ends. The first pliers body, the second pliers body, the movable handle and the connecting piece form a hinged four-bar mechanism, and the first pliers body and the movable handle are pivotally connected by an eccentric shaft in an adjustment component. The eccentric shaft is rotated by an adjustment knob sleeved on the end of the eccentric shaft to make the limit pressing position of the movable handle eccentrically rotate relative to the first pliers body. Correspondingly, the angle between the movable handle and the fixed handle at the limit pressing position will also change. The limit pressing position of the movable handle can be adjusted by adjusting the rotation angle of the adjustment knob, which effectively avoids excessive pressing and damage to the crimping terminal or even the wire, thereby improving the crimping quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The figure is a schematic diagram of the overall structure of an optional embodiment of the wire crimping pliers of the utility model.

[0016] Figure 2 It is a structural schematic diagram of a disassembled state of an optional embodiment of the wire crimping pliers of the utility model.

[0017] Figure 3 It is a schematic cross-sectional view of an optional embodiment of the wire crimping pliers of the utility model, taken longitudinally through the central axis of the elastic member.

[0018] Figure 4 It is a structural schematic diagram of the knob main part of an optional embodiment of the crimping pliers of the utility model at another three-dimensional angle.

[0019] Figure 5 It is a schematic cross-sectional view of an optional embodiment of the crimping pliers of the utility model, taken along the central axis of the large diameter section of the eccentric shaft when the crimping pliers is at maximum crimping tightness.

[0020] Figure 6 It is a schematic cross-sectional view of an optional embodiment of the crimping pliers of the utility model, taken along the central axis of the large diameter section of the eccentric shaft when the crimping pliers is at minimum crimping tightness.

[0021] Figure 7 It is a cross-sectional schematic diagram of an optional embodiment of the wire crimping pliers of the utility model, which crosses the eccentric shaft. DETAILED DESCRIPTION

[0022] The present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following illustrative embodiments and descriptions are only used to explain the present invention and are not intended to limit the present invention. In addition, the embodiments and features in the embodiments of the present application may be combined with each other without conflict.

[0023] like Figure 1-Figure 7 As shown, an optional embodiment of the utility model provides a wire crimping pliers, including a first pliers body 1 and a second pliers body 2 hinged to each other, one end of the first pliers body 1 is provided with a jaw 10 for adapting to and accommodating different signal crimping terminals, one end of the second pliers body 2 is provided with a pressing protrusion 21 corresponding to each of the jaws 10, and a fixed handle 23 extends from the opposite end, the wire crimping pliers also include a movable handle 3 pivotally connected to the end of the first pliers body 1, a connecting piece 4 pivotally connecting the movable handle 3 and the fixed handle 23 at both ends, and an adjusting component 5 for adjusting the extreme pressing position of the movable handle 3, the adjusting component 5 includes an eccentric shaft 50 for pivotally connecting the movable handle 3 and the first pliers body 1 and an adjusting knob 52 sleeved on the end of the eccentric shaft 50, the adjusting knob 52 is turned to make the movable handle 3 eccentrically rotate relative to the first pliers body 1 so that the extreme pressing position of the movable handle 3 is also relatively close to or away from the fixed handle 23.

[0024] The embodiment of the utility model is that the movable handle 3 is pivotally connected to the end of the first clamp body 1, and a connecting piece 4 is further provided to pivotally connect the movable handle 3 and the fixed handle 23 of the second clamp body 2 at both ends. The first clamp body 1, the second clamp body 2, the movable handle 3 and the connecting piece 4 form a hinged four-bar mechanism, and the first clamp body 1 and the movable handle 3 are pivotally connected by an eccentric shaft 50 in an adjustment component 5. The eccentric shaft 50 is screwed by an adjusting knob 52 sleeved on the end of the eccentric shaft 50, so that the limit pressing position of the movable handle 3 is eccentrically rotated relative to the first clamp body 1. Correspondingly, the angle between the movable handle 3 and the fixed handle 23 at the limit pressing position will also change. By adjusting the rotation angle of the adjusting knob 52, the limit pressing position of the movable handle 3 can be adjusted, and the pressure and tightness of the crimping pliers can be flexibly adjusted to effectively avoid excessive pressing and damaging the crimping terminals or even the wires, thereby improving the crimping quality.

[0025] In another optional embodiment of the present invention, Figure 2 and Figure 5As shown, the eccentric shaft 50 includes a large diameter section 501 and an eccentric section 503 connected to one end of the large diameter section 501 and with its axis offset relative to the large diameter section 501. The first caliper body 1 is provided with a first pivot hole 12 corresponding to the large diameter section 501, and the movable handle 3 is provided with a second pivot hole 30 corresponding to the eccentric section 503. The eccentric shaft 50 is pivotally connected to the first caliper body 1 and the movable handle 3 by the large diameter section 501 being inserted into the first pivot hole 12 and the eccentric section 503 being inserted into the second pivot hole 30. In this embodiment, the first caliper body 1 is sleeved and installed on the outside of the large diameter section 501 and the movable handle 3 is sleeved and installed on the outside of the eccentric section 503, so as to achieve the offset of the pivot axis of the movable handle 3 relative to the pivot axis of the first caliper body 1 and thus achieve the fine adjustment of the limit pressing position of the movable handle 3. During the specific implementation process, when the eccentric shaft 50 is rotated until the large diameter section 501 protrudes outward relative to the eccentric section 503 in the opening direction of the movable handle 3 and the protruding width is maximum, the angle between the movable handle 3 and the fixed handle 23 is minimum at the extreme pressing position, and the pressing tightness of the crimping pliers is maximum at this time; when the eccentric shaft 50 is rotated until the large diameter section 501 protrudes outward relative to the eccentric section 503 in the closing direction of the movable handle 3 and the protruding width is maximum, the angle between the movable handle 3 and the fixed handle 23 is maximum at the extreme pressing position, and the pressing tightness of the crimping pliers is minimum at this time; the eccentric section 503 can be respectively connected and extended from both ends of the large diameter section 501, and the movable handle 3 can be set as a double-layer structure and respectively mounted on the two sections of the eccentric section 503, so as to improve the structural strength of the crimping pliers.

[0026] In another optional embodiment of the present invention, Figure 2-Figure 6 As shown, an adjustment section 505 extends coaxially from the axis center of the free end of the eccentric section 503, and the adjustment knob 52 includes a knob main component 521 that is sleeved on the outside of the adjustment section 505 and relatively fixed to the adjustment section 505 in the circumferential direction. In this embodiment, the adjustment section 505 is coaxially extended on one side of the eccentric section 503, which facilitates the sleeve installation of the adjustment knob 52, and the knob main component 521 of the adjustment knob 52 is relatively fixed to the adjustment section 505 in the circumferential direction, ensuring the coaxial synchronous rotation of the knob main component 521 and the eccentric section 503, thereby achieving fine adjustment of the extreme pressing position of the movable handle 3. In the specific implementation process, Figure 2-Figure 3 As shown, the cross-section of the adjusting section 505 is set to be non-circular and a screw hole 5050 is opened on the end face. The center of the knob main component 521 is opened with a through hole 5210 whose cross-section is compatible with the adjusting section 505. The knob main component 521 is passed through the outside of the adjusting section 505 and is screwed into the screw hole 5050 from the outer end by a screw 5212 so that the knob main component 521 can rotate synchronously in the circumferential direction relative to the adjusting section 505 and is also locked accordingly in the axial direction, and the fixing effect is good.

[0027] In another optional embodiment of the present invention, Figure 2-Figure 6 As shown, the adjusting knob 52 also includes a chassis 523 fixed relatively to the movable handle 3, and a plurality of tooth grooves 5230 are circumferentially distributed on the chassis 523. A locking member 525 is provided on the side of the knob main part 521 facing the chassis 523, and the locking member 525 is snapped into the corresponding tooth groove 5230 to relatively fix the knob main part 521. The adjusting knob 52 in this embodiment includes a chassis 523 fixed on the movable handle 3, and a plurality of tooth grooves 5230 are circumferentially distributed on the chassis 523, and a locking member 525 is snapped with the tooth groove 5230 to lock the knob main part 521, so as to lock the tightness of the crimping pliers and facilitate the crimping operation; each grid of the tooth groove 5230 corresponds to a first-level adjustment, which is conducive to improving the adjustment accuracy.

[0028] In another optional embodiment of the present invention, Figure 2-Figure 6 As shown, the locking member 525 includes a button 5250 and an elastic member 5252, one side of the button 5250 is provided with a snap-in piece 5250a corresponding to the tooth groove 5230, and the side of the knob main component 521 is provided with a mounting hole 5214, the button 5250 is correspondingly assembled in the mounting hole 5214 and the two ends of the elastic member 5252 are respectively abutted between the button 5250 and the hole wall of the mounting hole 5214, the button 5250 is pushed by the elastic member 5252 so that the snap-in piece 5250a is snapped into the tooth groove 5230 to lock the knob main component 521, and pressing the button 5250 causes the elasticity of the elastic member 5252 to contract so that the snap-in piece 5250a withdraws from the notch of the tooth groove 5230 to unlock the knob main component 521. In this embodiment, the two ends of the elastic member 5252 respectively push the button 5250 and the knob main part 521. The button 5250 is pushed by the elastic member 5252 so that the clamping piece 5250a at the end of the button 5250 is inserted into the tooth groove 5230 to lock the knob main part 521. Pressing the button 5250 causes the elastic contraction of the elastic member 5252 so that the clamping piece 5250a withdraws from the notch of the tooth groove 5230 to unlock the knob main part 521. The locking and unlocking operations are simple and convenient, and the rapid adjustment and locking of the adjustment knob 52 can be achieved, thereby improving the wire pressing efficiency.

[0029] In another optional embodiment of the present invention, Figure 2-Figure 6As shown, a limiting block 5250b is protruded from the button 5250, and a limiting hole 5216 is provided on the hole wall of the mounting hole 5214 at one end away from the clamping piece 5250a, corresponding to the limiting block 5250b. The button 5250 is assembled into the mounting hole 5214 and the limiting block 5250b is pressed into the limiting hole 5216 to limit the activity of the button 5250. In this embodiment, a limiting hole 5216 is provided by protruding a limiting block 5250b from the button 5250 and pressing into the hole wall of the mounting hole 5214 at one end away from the clamping piece 5250a. The two side walls of the limiting hole 5216 perpendicular to the expansion and contraction direction of the elastic member 5252 limit the telescopic activity of the button 5250, and prevent the button 5250 from falling out of the hole opening of the mounting hole 5214.

[0030] In another optional embodiment of the present invention, Figure 2-Figure 4 As shown, the elastic member 5252 is a coil spring 5252, and the inner wall of the mounting hole 5214 correspondingly protrudes out a mounting post 5218, and the coil spring 5252 is correspondingly sleeved on the outer side of the mounting post 5218 and fixed between the button 5250 and the wall of the mounting hole 5214. In this embodiment, the mounting post 5218 is protruded from the inner wall of the mounting hole 5214 to facilitate the positioning and installation of the coil spring 5252.

[0031] In another optional embodiment of the present invention, Figure 2-Figure 6 As shown, the outer end surface of the knob main part 521 is also fixed with an indicator cover plate 527. In this embodiment, the indicator cover plate 527 is added to indicate the relationship between the adjustment direction and the pressing tightness, so that the user can adjust the pressing tightness of the crimping pliers according to the needs.

[0032] In another optional embodiment of the present invention, Figure 2 and Figure 7 As shown, the edge of the connecting piece 4 is provided with a rack 41, and the movable handle 3 is also pivotally connected to a safety buckle 6 having a convex tooth 61 meshing with the rack 41 at the edge. In this embodiment, the safety buckle 6 is pivotally arranged on the movable handle 3, and the edge of the safety buckle 6 is provided with a convex tooth 61 meshing with the rack 41 at the edge of the connecting piece 4. As the movable handle 3 is pressed, the safety buckle 6 moves along the meshing rack 41, and when the movable handle 3 is pressed to the limit position, it presses against the connecting piece, thereby improving the force stability during pressing.

[0033] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the present invention, ordinary technicians in this field can also make many variations without departing from the scope of protection of the purpose of the present invention and the claims, which all fall within the scope of protection of the present invention.

Claims

1. A wire crimping pliers, comprising a first clamp body and a second clamp body hinged to each other, wherein one end of the first clamp body is provided with a jaw for accommodating different signal crimping terminals, one end of the second clamp body is provided with a pressing protrusion corresponding to each of the jaws and a fixed handle is extended from the opposite end, characterized in that: The wire crimping pliers also include a movable handle pivotally connected to the end of the first pliers body, connecting plates pivotally connecting the movable handle and the fixed handle at both ends, and an adjustment component for adjusting the extreme pressing position of the movable handle. The adjustment component includes an eccentric shaft pivotally connecting the movable handle and the first pliers body and an adjustment knob sleeved on the end of the eccentric shaft. By turning the adjustment knob, the movable handle is eccentrically rotated relative to the first pliers body, and the extreme pressing position of the movable handle will be relatively close to or away from the fixed handle.

2. The wire crimping pliers according to claim 1, characterized in that: The eccentric shaft includes a large diameter section and an eccentric section connected to one end of the large diameter section and with its axis offset relative to the large diameter section. The first caliper body is provided with a first pivot hole corresponding to the large diameter section, and the movable handle is provided with a second pivot hole corresponding to the eccentric section. The eccentric shaft is pivotally connected to the first caliper body and the movable handle by having the large diameter section passing through the first pivot hole and the eccentric section passing through the second pivot hole.

3. The wire crimping pliers according to claim 2, characterized in that: An adjusting section coaxially extends from the axis center of the free end of the eccentric section, and the adjusting knob comprises a knob main part which is sleeved on the outside of the adjusting section and fixed relative to the adjusting section in the circumferential direction.

4. The crimping pliers according to claim 3, characterized in that: The adjusting knob also includes a chassis fixed relative to the movable handle, wherein a plurality of tooth grooves are circumferentially distributed on the chassis, and a locking member is provided on the side of the knob main part facing the chassis, and the locking member is inserted into the corresponding tooth groove to relatively fix the knob main part.

5. The wire crimping pliers according to claim 4, characterized in that: The locking component includes a button and an elastic component, one side of the button is provided with a snap-in piece that corresponds to the tooth groove, and the side of the knob main component is provided with a mounting hole, the button is assembled in the mounting hole and the two ends of the elastic component are respectively abutted between the button and the wall of the mounting hole, the button is pushed by the elastic component so that the snap-in piece is stuck in the tooth groove to lock the knob main component, and pressing the button causes the elasticity of the elastic component to contract so that the snap-in piece withdraws from the notch of the tooth groove to unlock the knob main component.

6. The wire crimping tool according to claim 5, characterized in that: A limit block protrudes from the button, and a limit hole is formed on the hole wall of the mounting hole away from the end of the clamping piece corresponding to the limit block. The button is assembled into the mounting hole and the limit block is pressed into the limit hole to limit the activity of the button.

7. The wire crimping pliers according to claim 5, characterized in that: The elastic member is a coil spring, the inner wall of the mounting hole protrudes out of the mounting column correspondingly, and the coil spring is correspondingly sleeved on the outer side of the mounting column and fixed between the button and the wall of the mounting hole.

8. The wire crimping pliers according to claim 4, characterized in that: An indicating cover plate is also fixed to the outer end surface of the knob main part.

9. The wire crimping pliers according to claim 1, characterized in that: A rack is provided at the edge of the connecting piece, and the movable handle is also pivotally connected to a safety buckle with convex teeth meshing with the rack at the edge.

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