An electric wire crimping tool

Abstract

This utility model relates to an electric wire crimping pliers, belonging to the field of power tool technology. The tool includes front and rear support plates fixed in a housing, and a motor-driven drive shaft mounted at one end of the housing. The front and rear support plates hinge the left and right jaws, as well as front and rear adjusting levers and a switch wrench. The front support plate has an electric sliding groove, which forms a sliding pair with the motor drive block, one end of which has an electric opening ramp. The rear support plate has a manual sliding groove, which forms a sliding pair with the manual drive block, which has a manual opening ramp. The front and rear support plates are equipped with left and right sliders, which are hinged to the inner ends of the left and right jaws respectively. An elastic pulling element is installed between the left and right sliders. When the switch wrench is released, the left and right sliders return to their original position under the action of the elastic pulling element, causing the left and right jaws to open. This utility model can shorten working time and improve efficiency; moreover, it allows the jaws to open automatically, making operation more convenient.

Description

Technical Field

[0001] This utility model relates to an electric crimping tool, and more particularly to a handheld electric crimping pliers, belonging to the field of power tool technology. Background Technology

[0002] The typical structure of electric wire crimping pliers is disclosed in Chinese Patent Application No. 201380042456.8. However, due to the "no-load stroke" of the motor after switching from manual to electric operation, its efficiency is affected. Therefore, Chinese Patent Application No. 202311379628.2 proposes an electric crimping tool. This improved design features jaw closure driven sequentially by both manual and electric mechanisms, allowing for quick manual clamping followed by electric tightening. Furthermore, because manual and electric loading are separated and partially overlap, the electric mechanism directly drives the loading component, reducing the "no-load stroke" of the manual loading component and thus shortening operation time and improving efficiency. However, in practice, it has been found that the above-mentioned improved design lacks an automatic jaw opening function. Utility Model Content

[0003] The purpose of this utility model is to address the shortcomings of the existing technology by proposing an electric wire crimping tool that not only reduces the "no-load stroke" but also allows the jaws to open automatically, thus making operation and use more convenient.

[0004] To achieve the above objectives, the basic technical solution of this utility model electric wire crimping pliers is as follows: 1. An electric wire crimping pliers: including front and rear support plates fixed in the housing, and a motor-driven drive shaft installed at one end of the housing;

[0005] The front and rear support plates are hinged to the left and right jaws at the ends away from the motor, to the front and rear adjusting levers on one side of the middle section, and to the switch wrench on the lower side; the end of the switch wrench away from the handle engages with the adjacent ends of the front and rear adjusting levers respectively; characterized in that:

[0006] The front support plate has an electric sliding groove in the middle, and the electric sliding groove and the motor drive block form a sliding pair. One end of the motor drive block has an electric opening inclined surface.

[0007] The rear support plate has a manual sliding groove in the middle, and the manual sliding groove and the manual drive block form a sliding pair. One end of the manual drive block has a manual opening inclined surface.

[0008] One of the front and rear support plates is equipped with left and right sliders that form a sliding pair with it, and the left and right sliders are respectively hinged to the inner ends of the left and right jaws, and an elastic pulling member is installed between the left and right sliders;

[0009] When the switch wrench is in the manual travel position, one end of the rear adjusting lever presses down on the manual drive block, causing it to manually open the inclined plane and gradually open the left and right sliders, thus driving the left and right jaws to close; when the switch wrench is in the electric travel position, the starter motor is triggered to drive the electric drive block, causing it to electrically open the inclined plane and continue to open the left and right sliders, thus driving the left and right jaws to close.

[0010] When the switch wrench is released, the left and right sliders are reset under the action of the elastic pull member, causing the left and right jaws to open.

[0011] Because this utility model not only retains the structural feature of 202311379628.2 where manual and electric drive loading components are set separately, the jaw closure is compactly connected by manual and then electric operation. The electric drive component does not need to repeat the "no-load stroke" of the manual drive component after starting, which can shorten the operation time and improve efficiency. Moreover, because it is equipped with a left and right slider structure that can be elastically pulled and reset, the jaws can open automatically, making operation more convenient.

[0012] A further improvement of this utility model is that: the left and right sliders have a spreading cam and a tension spring pin on the side away from their respective guide posts, and a tension spring is installed between the tension spring pins of the left and right sliders.

[0013] Furthermore: the front support plate has a spreading groove located on both sides of the electric sliding groove in the middle, and the rear support plate has a clearance groove extending from one end of the manual sliding groove to both sides in the middle.

[0014] Further: The guide columns that pass through the rear support plate clearance groove on both sides of the electric slide groove are respectively inserted into the expansion slide groove to form a sliding pair with it.

[0015] Further: the front adjusting lever is located outside the front support plate, and the rear adjusting lever is located outside the rear support plate.

[0016] Furthermore, the drive shaft and the center hole of the motor drive block form a helical pair.

[0017] Further: The front and rear support plates are fitted with front covers at the ends adjacent to the jaws.

[0018] Furthermore: the housing is formed by joining two halves together. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] Figure 1 This is a three-dimensional exploded structural diagram of Embodiment 1 of this utility model.

[0021] Figure 2 yes Figure 1 A schematic diagram of the structure at the initial position of the embodiment.

[0022] Figure 3 yes Figure 2 A schematic diagram of the rear view structure.

[0023] Figure 4 yes Figure 1 A schematic diagram of the manual crimping structure in the embodiment.

[0024] Figure 5 yes Figure 4 A schematic diagram of the rear view structure.

[0025] Figure 6 yes Figure 1 A schematic diagram of the structure of the electric crimping embodiment.

[0026] Figure 7 yes Figure 6 A schematic diagram of the rear view structure.

[0027] In the diagram: 10: Housing; 20: Rear adjusting lever; 30: Rear support plate; 40: Left jaw; 50: Right jaw; 60: Front support plate; 70: Switch wrench; 80: Tension spring; 90: Manual drive block; 101: Micro switch 1; 102: Micro switch 2; 103: Micro switch 3; 104: Micro switch 4; 110: Right slider; 120: Left slider; 130: Motor drive block; 140: Front cover; 150: Oil reservoir cap; 160: Motor; 170: Gearbox; 171: Output shaft; 180: Front adjusting lever; 190: Reset spring; 210: Disc-shaped washer. Detailed Implementation Example

[0028] The overall structure of the electric wire crimping pliers in this embodiment is as follows: Figure 1As shown, a front and rear support plates 60 and 30 are fixed in a housing 10 formed by the joining of two halves. A drive shaft 171, driven by a motor 160 and a gearbox 170, extends into the housing 10 and is mounted at one end of the housing 10. The drive shaft 171 and the center hole of the motor drive block 130 form a helical pair for transmission connection, and a disc-shaped gasket 210 for buffering is installed between them. The left and right jaws 40 and 50, located between the front and rear support plates 60 and 30, are respectively hinged on both sides of the end away from the motor, and the front and rear adjusting levers 180 and 20 are coaxially hinged on one side of the middle part, and a switch wrench 70 is hinged on the lower part. The front adjusting lever 180 is located outside the front support plate 60, and the rear adjusting lever 20 is located outside the rear support plate 30. Partial teeth of the end of the switch wrench 70 away from the handle engage with the adjacent ends of the front and rear adjusting levers 180 and 20, and a return spring 190 is installed at the part where it is disengaged. These basic structures are similar to existing technologies. Rollers are mounted on the inner ends of the left and right jaws 40 and 50. Front and rear support plates 60 and 30 have front covers 140 near the jaws to prevent foreign objects and debris from entering the machine housing. The front and rear support plates 60 and 30 are also equipped with microswitches 101 (for controlling electric forward rotation), 104 (for controlling electric reverse rotation), 102 (for controlling jaw closure and stopping), and 103 (for controlling jaw opening and stopping) via mounting plates.

[0029] The front support plate 60 has an electric slide groove 60a extending axially along the drive shaft 171 in the middle, and a spreading slide groove 60b located on both sides of the electric slide groove. The electric slide groove 60a is connected by a protrusion 130b on the surface adjacent to the motor drive block 130 (see...). Figure 2 The motor drive block 130 forms a sliding pair, and one end of the motor drive block 130 has a symmetrical electrically openable inclined surface 130a corresponding to the two rollers respectively.

[0030] The rear support plate 30 has a manual slide groove 30a extending axially along the drive shaft and a clearance groove 30b extending from one end of the manual slide groove to both sides. The manual slide groove 30a and the protrusion 90a on the adjacent surface of the manual drive block 90 form a sliding pair. One end of the manual drive block has a symmetrical manual opening inclined surface 90b.

[0031] The left and right sliders 120 and 110 are hinged to the inner ends of the left and right jaws 40 and 50, respectively. The side of each slider away from the guide post 110c has a spreading cam 110b and a tension spring pin 110a. A tension spring 80 is installed between the tension spring pins of the left and right sliders. The spreading slide grooves 60b on both sides of the electric slide groove 60a are respectively inserted into the guide post 110c, which passes through the relief groove 30B of the rear support plate 30 and forms a sliding pair with it.

[0032] When the switch lever 70 is in its natural state under the action of the return spring 190, such as Figure 2 , Figure 3 As shown, the left and right jaws are open by 40 and 50 degrees respectively.

[0033] When the switch wrench 70 is in the initial manual travel position, such as Figure 4 , Figure 5 As shown, one end of the rear adjusting lever 20 presses down on the manual drive block 90, causing it to manually open the inclined plane 90b, which acts on the opening cam 110b to gradually open the left and right sliders 120 and 110, thereby driving the left and right jaws 40 and 50 to engage.

[0034] When the switch wrench is in its later electric travel phase, one side of it triggers the micro switch 101, such as... Figure 6 , 7 As shown, the motor 160 drives the electric drive block 130 through the gearbox 170 and the helical pair of the drive shaft, so that it electrically opens the inclined plane 130a and opens the left and right sliders 120 and 110 through the corresponding rollers, which drives the left and right jaws 40 and 50 to close, until they are closed and the micro switch 102 is triggered to stop the machine.

[0035] When the switch lever 70 is released, the left and right sliders 120 and 110 are reset under the action of the tension spring 80, causing the left and right jaws 40 and 50 to open. Figure 2 , 3 The natural state position is shown.

[0036] During the above process, in case of an emergency, the micro switch 104 can be triggered to reverse the motor and open the left and right jaws 40 and 50. Once the predetermined jaw opening limit position is reached, the micro switch 103 is triggered and the motor stops.

[0037] Experiments show that, because the manual and electric drives are set separately in this embodiment, the jaw closure is tightly connected, first manually and then electrically, effectively reducing the "no-load stroke" and shortening the operation time and improving efficiency. More importantly, the left and right sliders allow the jaws to open automatically, making operation more convenient. In addition, the prior art places both the manual and electric drive devices in the middle of the support plate, while the manual drive part in this embodiment is placed on the outside of the corresponding support plate, and the electric drive part is also further reduced in size; moreover, the existing technology requires two PCB boards inside, which is more complex and larger in size, while this embodiment integrates the micro switch on a single connecting board, resulting in a compact structure that helps reduce size.

[0038] In addition to the embodiments described above, this utility model may have other implementations. All technical solutions formed by equivalent substitution or equivalent transformation fall within the protection scope claimed by this utility model.

Claims

1. An electric wire crimping pliers: including front and rear support plates (60, 30) fixed in a housing (10), and a drive shaft (171) driven by a motor (160) mounted at one end of the housing. The front and rear support plates are hinged to the left and right jaws (40, 50) at the ends away from the motor, to the front and rear adjusting levers (180, 20) on one side of the middle section, and to the switch wrench (70) on one side of the lower section; the end of the switch wrench away from the handle engages with the adjacent ends of the front and rear adjusting levers respectively; characterized in that: The front support plate has an electric sliding groove in the middle, and the electric sliding groove and the motor drive block (130) form a sliding pair. One end of the motor drive block has an electric opening inclined surface. The rear support plate has a manual sliding groove in the middle, and the manual sliding groove and the manual drive block (90) form a sliding pair. One end of the manual drive block has a manual opening inclined surface. One of the front and rear support plates is equipped with left and right sliders (120, 110) that form a sliding pair with it respectively. The left and right sliders are respectively hinged to the inner ends of the left and right jaws. An elastic pulling member (80) is installed between the left and right sliders. When the switch wrench is in the manual travel position, one end of the rear adjusting lever presses down on the manual drive block, causing it to manually open the inclined plane and gradually open the left and right sliders, thus driving the left and right jaws to close; when the switch wrench is in the electric travel position, the starter motor is triggered to drive the electric drive block, causing it to electrically open the inclined plane and continue to open the left and right sliders, thus driving the left and right jaws to close. When the switch wrench is released, the left and right sliders are reset under the action of the elastic pull member, causing the left and right jaws to open.

2. The electric wire crimping pliers according to claim 1, characterized in that: The left and right sliders each have a spreading cam and a tension spring pin on the side away from their respective guide posts, and a tension spring is installed between the tension spring pins of the left and right sliders.

3. The electric wire crimping pliers according to claim 2, characterized in that: The front support plate has a spreading groove in the middle, located on both sides of the electric sliding groove, and the rear support plate has a clearance groove in the middle, extending from one end of the manual sliding groove to both sides.

4. The electric wire crimping pliers according to claim 3, characterized in that: The guide columns on both sides of the electric slide groove are respectively inserted through the rear support plate clearance groove to form a moving pair.

5. The electric wire crimping pliers according to claim 4, characterized in that: The front adjusting lever is located outside the front support plate, and the rear adjusting lever is located outside the rear support plate.

6. The electric wire crimping pliers according to claim 5, characterized in that: The drive shaft and the center hole of the motor drive block form a helical pair.

7. The electric wire crimping pliers according to claim 6, characterized in that: The front and rear support plates are fitted with front covers at the ends of the jaws adjacent to the front and rear support plates.

8. The electric wire crimping pliers according to claim 7, characterized in that: The casing is formed by joining two halves together.

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