Cable crimping pliers for electric power fittings

Abstract

The present invention discloses a cable crimping pliers for electric power fittings, which relates to the technical field of wire connection, and includes a housing, a crimping column, a linear drive mechanism, a clamp barrel and a plurality of wire dies, wherein the clamp barrel is fixedly connected to the housing, one end of the clamp barrel is fixedly connected to a clamp arm, and the end of the clamp arm away from the clamp barrel has a limiting portion, the clamp arm is slidably connected to an abutment member and is provided with an elastic member, and the elastic force of the elastic member acts on the abutment member in the direction of the clamp barrel, and the wire dies include a first clamp mouth and a second clamp mouth that are slidably connected, the wire dies can be provided on the clamp arm, the abutment member can be slidably limited with a slide groove on the first clamp mouth, the abutment member can be abutted with the second clamp mouth, and the crimping column can abut the abutment member and the second clamp mouth; the first clamp mouth is fixedly connected to a first magnet and a second magnet, the first magnet can be magnetically matched with the limiting portion, and the second magnet can be magnetically matched with the second clamp mouth. The operation of disassembly and installation when replacing the wire die of the present invention is very convenient.

Description

Technical Field

[0001] The invention relates to the technical field of conductor connection, in particular to a cable crimping pliers used for electric power fittings. Background Art

[0002] In the field of power construction, the reliability and safety requirements of cable connections are getting higher and higher. Traditional cable connection methods often use methods such as bolt tightening or welding, but the bolt tightening method may cause poor contact due to loosening, affecting the stability of power transmission. The welding method requires professional welding equipment and technicians, which is complicated and costly to operate. Therefore, the cable crimping method has begun to be widely promoted. The cable crimping pliers mechanically crimp the cable joints to form a tight connection between the cable conductors. The crimped cable joints can withstand greater tension and current, and are not easy to loosen or disconnect, which improves the stability and reliability of power transmission. In addition, the operation is simpler and faster, and can be completed without professional technicians, which improves construction efficiency.

[0003] For example, the patent with publication number CN114914770A discloses an electric crimping pliers with a pressure sensor, which includes a crimping pliers body and a handle fixedly connected to the crimping pliers body, a battery box is connected to the lower end of the handle, a switch button is arranged on the inner side of the handle, the crimping pliers body includes a shell, a cylinder is arranged in the shell, the output shaft of the cylinder is fixedly connected to the mobile crimping pliers, a mobile crimping pliers mold is connected to the mobile crimping pliers, a pressure sensor is also embedded in the mobile crimping pliers, and a main display screen is arranged on the upper surface of the shell, a fixed block is connected to the outside of the shell, a fixed crimping pliers is fixedly connected to the fixed block, and a fixed crimping pliers mold is connected to the fixed crimping pliers. By arranging a pressure sensor inside, it is possible to understand the crimping pressure during the crimping process, avoiding the phenomenon of wire damage caused by excessive crimping force or loose contact between the wire and the terminal caused by too little crimping pressure.

[0004] For another example, the patent application with announcement number CN210576955U discloses an electric crimping pliers that is easy to hold, which includes a handle, a battery box, a back seat and a switch button. A cylinder is fixed inside the back seat. When working, first, the left fixed mold and the right fixed mold are installed and fixed on the left crimping pliers and the right crimping pliers through the upper limit block and the lower limit block to limit their shaking and make the crimping more secure. Secondly, the worker places the material to be crimped between the left fixed mold and the right fixed mold. At this time, the switch button is pressed to drive the cylinder to drive the right crimping pliers to slide to the left on the upper surface of the support block until it cooperates with the left crimping pliers to complete the crimping.

[0005] The prior art such as the above-mentioned patents discloses the technology of handheld electric crimping pliers, which is convenient for crimping cables. The shortcoming is that the former does not disclose the technology of replacing the crimping pliers mold. Although the latter discloses the technology of replacing the fixed mold, it is necessary to limit the position by operating the upper limit block and the lower limit block, and the left fixed mold and the right fixed mold need to be operated separately for loading, unloading and replacement. It is not convenient to use in practice, and the left fixed mold and the right fixed mold need to be carefully checked during installation, and they often do not match after installation. Summary of the invention

[0006] The purpose of the present invention is to provide a cable crimping pliers for electric power fittings to solve the deficiencies in the above-mentioned prior art.

[0007] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a cable crimping pliers for electric power hardware, comprising a shell, a crimping column and a linear drive mechanism for driving the crimping column to slide relative to the shell, and also comprising: a pliers barrel, which is fixedly connected to the shell, one end of the pliers barrel is fixedly connected to a pliers arm, the end of the pliers arm away from the pliers barrel has a limiting portion, an abutment is slidably connected to the pliers arm and an elastic member is provided, the elastic force of the elastic member acts on the abutment in the direction of the pliers barrel; at least one wire die, which comprises a first pliers mouth and a first pliers mouth that are slidably connected to each other; The second pliers mouth, the wire mold can be set on the pliers arm, the abutment can cooperate with the sliding limit of the slide groove on the first pliers mouth, the abutment can abut and cooperate with the second pliers mouth, and the crimping column can abut the abutment and the second pliers mouth; the first pliers mouth is fixedly connected with the first magnet and the second magnet, the first magnet can magnetically cooperate with the limiting part, and the second magnet can magnetically cooperate with the second pliers mouth. When the first pliers mouth abuts and cooperates with the limiting part and is closed together with the second pliers mouth, the magnetic attraction force of the first magnet and the elastic force of the elastic part are both greater than the magnetic attraction force of the second magnet.

[0008] Furthermore, the abutment member includes a connected sliding rod and an abutment block, the sliding rod is slidably connected in a guide groove on the clamp arm, and the abutment block is slidably matched with the sliding groove and abuts against the second clamp mouth.

[0009] Furthermore, a through hole matched with the crimping column is provided on the clamp barrel, the crimping column is movably arranged in the through hole, a protrusion is fixedly connected to the side surface of the crimping column, and the protrusion is slidably matched with the guide groove.

[0010] Furthermore, a protruding slider is fixedly connected to the second jaw, and the second jaw is slidably matched with the slide groove on the first jaw via the slider, and the second jaw is abutted against the abutment via the slider.

[0011] Furthermore, the elastic member includes a compression spring located in the guide groove, one end of the compression spring is connected to a limit plate fixedly connected to the corresponding clamp arm, and the other end is connected to the abutment member.

[0012] Furthermore, the first jaw and the second jaw are respectively provided with pressing grooves, and each pressing groove includes at least two sections that are offset from each other along the depth direction.

[0013] Furthermore, there are multiple wire dies, and a storage plate is fixedly mounted on the clamp barrel or the housing. Each wire die is magnetically attracted in parallel on a fixed rod on the storage plate through a first magnet thereon.

[0014] Furthermore, a clamp is provided on the storage plate, and the clamp is clamped on the clamp barrel.

[0015] Furthermore, the storage plate is provided with a plurality of storage slots corresponding to each wire mold, and each wire mold is placed in a corresponding storage slot.

[0016] Furthermore, the linear drive mechanism includes a linear motor fixedly disposed in the housing, and an output shaft of the linear motor is fixedly connected to the crimping column.

[0017] Compared with the prior art, the cable crimping pliers for electric power fittings provided by the present invention have the following beneficial effects:

[0018] The first jaw and the second jaw of the wire die are connected together by sliding, so there will be no confusion.

[0019] When installing and removing the wire mold, you only need to place the wire mold on the clamp arm and move it until it abuts against the limit part to complete the stable installation. You can pull the wire mold away from the limit part to complete the removal of the wire mold. The operation is convenient and quick, and there is no need to operate the first clamp mouth and the second clamp mouth separately.

[0020] When the wire die is not installed, the first jaw is magnetically coupled with the second jaw through the second magnet, so as to prevent the first jaw and the second jaw from shaking due to relative sliding during the storage of the wire die.

[0021] When installing the wire die, after the first jaw abuts against the limiting part, the first jaw is magnetically engaged with the limiting part through the first magnet, and the elastic force of the elastic member pushes the second jaw away from the first jaw through the abutting member, so that the cable can be conveniently placed in the pressing groove between the first jaw and the second jaw, and the cable can be conveniently taken out from the pressing groove after crimping.

[0022] The setting of the abutment has two functions. One is to slide with the slide groove on the first jaw to limit the wire mold in the thickness direction, so that the wire mold remains stable when crimping the cable. The second is to open the second jaw from the first jaw to facilitate the removal of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0024] Figure 1 A schematic diagram of the overall structure provided by an embodiment of the present invention;

[0025] Figure 2 A schematic diagram of the structure of the abutment member and the elastic member provided in an embodiment of the present invention;

[0026] Figure 3 A schematic diagram of the structure of a wire mold provided by an embodiment of the present invention;

[0027] Figure 4 A schematic diagram of the structure of a wire mold provided by an embodiment of the present invention when it is placed on a clamp arm;

[0028] Figure 5 A structural cross-sectional view of a wire mold provided by an embodiment of the present invention when placed on a clamp arm;

[0029] Figure 6 A structural cross-sectional view of a first jaw provided by an embodiment of the present invention when it abuts against a limiting portion;

[0030] Figure 7 A structural cross-sectional view of the wire mold provided by an embodiment of the present invention when it is opened;

[0031] Figure 8 A cross-sectional view of the structure during crimping provided by an embodiment of the present invention;

[0032] Fig. 9 A schematic structural diagram of a storage plate storing wire molds provided in an embodiment of the present invention.

[0033] Description of reference numerals:

[0034] 1. Shell; 1.1. Handle; 2. Crimping column; 2.1. Bump; 3. Pliers barrel; 4. Pliers arm; 4.1. Limiting part; 4.2. Guide groove; 5. Abutment; 5.1. Slide bar; 5.2. Abutment block; 6. Compression spring; 6.1. Limiting plate; 7. Wire die; 7.1. First pliers mouth; 7.11. Slide groove; 7.2. Second pliers mouth; 7.21. Sliding block; 7.3. First magnet; 7.4. Second magnet; 7.5. Pressing groove; 8. Storage plate; 8.1. Storage groove; 8.2. Fixing rod; 9. Hoop. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0036] See also Figure 1-9 A cable crimping pliers for electric power hardware provided by an embodiment of the present invention comprises a shell 1, a crimping column 2, a pliers barrel 3 and a plurality of wire dies 7. The shell 1 comprises a handle 1.1, which is gun-shaped as a whole. One end of the pliers barrel 3 is fixedly connected to the shell 1, and the crimping column 2 is slidably arranged in the pliers barrel 3, that is, the crimping column 2 can slide relative to the pliers barrel 3 and the shell 1. Specifically, a through hole matched with the crimping column 2 is opened on the pliers barrel 3, and the crimping column 2 moves through the through hole. A linear motor, a power supply for powering the linear motor and related control components are arranged in the shell 1, and the output shaft of the linear motor is fixedly connected to the crimping column 2, thereby driving the crimping column 2 to slide relative to the pliers barrel 3.

[0037] A clamp arm 4 is fixedly connected to the end of the clamp barrel 3 away from the shell 1. The clamp arm 4 is L-shaped or J-shaped as a whole. A guide groove 4.2 is opened on the clamp arm 4 along the length direction (i.e. the sliding direction of the crimping column 2). In order to further improve the stability of the movement of the crimping column 2, a protrusion 2.1 is fixedly connected to the side of the crimping column 2. The protrusion 2.1 slides in the guide groove 4.2 on the clamp arm 4. The end of the clamp arm 4 away from the clamp barrel 3 has a limiting portion 4.1, and an abutment 5 is slidably connected in the guide groove 4.2 on the clamp arm 4. A limiting plate 6.1 is screwed at the exit of the guide groove 4.2 on the clamp arm 4, and a compression spring 6 is provided in the guide groove 4.2. One end of the compression spring 6 is connected to the limiting plate 6.1, and the other end is connected to the abutment 5. The elastic force of the compression spring 6 acts on the abutment 5 along the guide groove 4.2 toward the clamp barrel 3. Of course, the compression spring 6 can also be replaced by other elastic parts, as long as the elastic force of the elastic part acts on the abutment part 5 in the direction of the clamp barrel 3, such as a tension spring, an air spring, an elastic sheet, etc.

[0038] The wire mold 7 includes a first jaw 7.1 and a second jaw 7.2. The first jaw 7.1 and the second jaw 7.2 are respectively provided with a pressing groove 7.5. The first jaw 7.1 and the second jaw 7.2 are slidably connected. The specific structure is that the first jaw 7.1 is provided with a sliding groove 7.11, and the second jaw 7.2 is fixedly connected with a protruding slider 7.21. The second jaw 7.2 is slidably connected with the first jaw 7.1 by the slider 7.21 and the sliding groove 7.11. The second jaw 7.2 is slidably connected with the first jaw 7.1. .21 abuts and cooperates with the abutment piece 5, and the extreme state of the first jaw 7.1 and the second jaw 7.2 sliding together is that the sides of the two having the pressing groove 7.5 abut against each other, and the pressing grooves 7.5 on the two are matched together. When the two slide and separate to the extreme state, they will not completely separate, but the end of the slide groove 7.11 close to the pressing groove 7.5 has a first limit block, and the slider 7.21 has a second limit block. The first limit block abuts against the second limit block, so that the first jaw 7.1 and the second jaw 7.2 still remain in a connected state.

[0039] The abutment 5 includes two parts, namely a connected sliding rod 5.1 and an abutment block 5.2. The sliding rod 5.1 is slidably connected to the guide groove 4.2 on the clamp arm 4. The abutment block 5.2 is used to slide with the sliding groove of the first clamp mouth 7.1 to keep the wire mold 7 stable with the clamp arm 4 in its thickness direction. The abutment block 5.2 is also used to abut with the slider 7.21 on the second clamp mouth 7.2, and can open the second clamp mouth 7.2 from the first clamp mouth 7.1 under the elastic force of the compression spring 6, so as to facilitate the removal of the cable from the pressing groove 7.5.

[0040] The wire mold 7 can be arranged on the pliers arm 4, the abutment 5 can be slidably limited and matched with the slide groove 7.11 on the first pliers mouth 7.1, the abutment 5 can abut and match with the second pliers mouth 7.2, the crimping column 2 can abut the abutment 5 and the second pliers mouth 7.2, and the limiting part 4.1 can abut and match with the first pliers mouth 7.1; the first pliers mouth 7.1 is fixedly connected with the first magnet 7.3 and the second magnet 7.4, the first magnet 7.3 can be magnetically matched with the limiting part 4.1, and the second magnet 7.4 can be magnetically matched with the second pliers mouth 7.2. When the first pliers mouth 7.1 abuts and matches with the limiting part 4.1 and is closed with the second pliers mouth 7.2, the magnetic attraction force of the first magnet 7.3 and the elastic force of the elastic part are both greater than the magnetic attraction force of the second magnet 7.4.

[0041] When installing the wire die 7, the user first places the wire die 7 on the clamp arm 4, aligns the slide groove 7.11 on the first clamp mouth 7.1 with the abutment block 5.2 of the abutment member 5, pushes the wire die 7 in the direction close to the limiting portion 4.1, specifically pushes the second clamp mouth 7.2, and the slide groove 7.11 is sleeved on the abutment block 5.2. The wire die 7 is limited by the abutment block 5.2 relative to the clamp arm 4 in the thickness direction. Figure 4-5 ; Continue to push the wire die 7, the slider 7.21 on the second jaw 7.2 abuts and pushes the abutment block 5.2 to slide in the direction close to the limit portion 4.1, and the compression spring 6 is compressed and stored until the first jaw 7.1 abuts against the limit portion 4.1. At this time, the first jaw 7.1 is magnetically attracted to the limit portion 4.1 through the first magnet 7.3, as shown in FIG. Figure 6 Then the user releases the wire mold 7, the elastic force of the compression spring 6 is released and acts on the second jaw 7.2 through the abutment 5. Since the magnetic attraction of the first magnet 7.3 is greater than that of the second magnet 7.4, and the elastic force of the compression spring 6 is greater than that of the second magnet 7.4, the compression spring 6 pushes the second jaw 7.2 to slide apart relative to the first jaw 7.1 through the abutment 5. Figure 7, so that the cable copper sleeve or wire nose to be crimped can be placed in the crimping groove 7.5 of the wire die 7 very conveniently; then the crimping column 2 is driven by the linear motor to move toward the wire die 7, the crimping column 2 abuts and drives the second jaw 7.2 to move, the second jaw 7.2 slides closer to the first jaw 7.1, and squeezes the abutment 5 to make the abutment 5 slide in the guide groove 4.2 toward the limit portion 4.1, and at the same time the compression spring 6 is further compressed to store energy, the crimping groove 7.5 of the second jaw 7.2 is aligned with the crimping groove 7.5 of the first jaw 7.1 to crimp the cable, as shown in FIG. Figure 8 After the crimping is completed, the linear motor drives the crimping column 2 to move in the opposite direction and reset. After the second jaw 7.2 loses the pressure of the crimping column 2, the elastic force of the compression spring 6 is released, and the compression spring 6 pushes the second jaw 7.2 to slide apart relative to the first jaw 7.1 again through the abutment 5, so that the crimped cable can be easily taken out of the crimping groove 7.5. The cable crimping operation can be continued later.

[0042] When the wire mold 7 on the clamp arm 4 needs to be replaced, the user pulls the wire mold 7 in the direction away from the limit portion 4.1. The pulling force is greater than the magnetic attraction force of the magnetic limit portion 4.1 of the first magnet 7.3, so that the wire mold 7 can be removed from the clamp arm 4, and then another wire mold 7 can be installed according to the aforementioned steps for installing the wire mold 7.

[0043] In a further preferred technical solution, refer to Figure 3 The pressing groove 7.5 on the first jaw 7.1 and the second jaw 7.2 includes at least two sections that are offset in depth, so that in one crimping operation, the crimped cable connection has at least two offset crimping marks, which can significantly improve the strength of the cable crimping connection.

[0044] See also Figure 1 , Fig. 9 In order to facilitate carrying multiple wire dies 7 and prevent the wire dies 7 from being lost, a storage plate 8 is connected to the clamp barrel 3 or the housing 1 by screwing, connecting with a clamp hoop 9 or welding. For example, by connecting with a clamp hoop 9, the clamp hoop 9 is fixedly connected to the storage plate 8, and the clamp hoop 9 is locked on the clamp barrel 3. A plurality of storage slots 8.1 are provided on the storage plate 8. The number of the storage slots 8.1 is equal to the number of the wire dies 7 or one less than the number of the wire dies 7. Each wire die 7 is placed in a corresponding storage slot 8.1. A fixing rod 8.2 made of magnetic material is fixedly connected to the storage plate 8. Each wire die 7 is magnetically connected to the fixing rod 8.2 through a first magnet 7.3 thereon.

[0045] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A cable crimping pliers for electric power fittings, comprising a housing, a crimping post, and a linear drive mechanism for driving the crimping post to slide relative to the housing, characterized in that: Also includes: A clamp barrel is fixedly connected to the housing, one end of the clamp barrel is fixedly connected to a clamp arm, the end of the clamp arm away from the clamp barrel has a limiting portion, an abutment is slidably connected to the clamp arm and an elastic member is provided, and the elastic force of the elastic member acts on the abutment in the direction of the clamp barrel; At least one wire mold includes a first jaw and a second jaw that are slidably connected to each other. The wire mold can be set on the jaw arm. The abutment can cooperate with the sliding groove on the first jaw to limit the position. The abutment can abut and cooperate with the second jaw. The crimping column can abut the abutment and the second jaw. The first jaw is fixedly connected with a first magnet and a second magnet. The first magnet can magnetically cooperate with the limiting part, and the second magnet can magnetically cooperate with the second jaw. When the first jaw abuts and cooperates with the limiting part and is closed with the second jaw, the magnetic attraction force of the first magnet and the elastic force of the elastic part are both greater than the magnetic attraction force of the second magnet.

2. A cable crimping pliers for electric power fittings according to claim 1, characterized in that: The abutment member comprises a connected sliding rod and an abutment block, the sliding rod is slidably connected in a guide groove on the clamp arm, and the abutment block is slidably matched with the sliding groove and abuts against the second clamp mouth.

3. A cable crimping pliers for electric power fittings according to claim 1, characterized in that: The clamp barrel is provided with a through hole matched with the crimping column, the crimping column is movably arranged in the through hole, a convex block is fixedly connected to the side surface of the crimping column, and the convex block is slidably matched with the guide groove.

4. A cable crimping pliers for electric power fittings according to claim 1, characterized in that: A protruding slider is fixedly connected to the second jaw, and the second jaw is slidably matched with the slide groove on the first jaw through the slider, and the second jaw is abutted against the abutment through the slider.

5. The cable crimping pliers for electric power fittings according to claim 1, characterized in that: The elastic member comprises a compression spring located in the guide groove, one end of the compression spring is connected to a limit plate fixedly connected to the corresponding clamp arm, and the other end is connected to the abutment member.

6. The cable crimping pliers for electric power fittings according to claim 1, characterized in that: The first jaw and the second jaw are respectively provided with pressing grooves, and each pressing groove includes at least two sections that are staggered along the depth direction.

7. The cable crimping pliers for electric power fittings according to claim 1, characterized in that: There are multiple wire dies, and a storage plate is fixedly installed on the clamp barrel or the shell. Each wire die is magnetically attracted in parallel on a fixed rod on the storage plate through a first magnet thereon.

8. A cable crimping pliers for electric power fittings according to claim 7, characterized in that: The storage plate is provided with a clamp hoop which is clamped on the clamp barrel.

9. The cable crimping pliers for electric power fittings according to claim 7, characterized in that: The storage plate is provided with a plurality of storage slots corresponding to each wire mold, and each wire mold is placed in a corresponding storage slot.

10. The cable crimping pliers for electric power fittings according to claim 1, characterized in that: The linear drive mechanism comprises a linear motor fixedly arranged in the housing, and the output shaft of the linear motor is fixedly connected to the crimping column.

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