Welding grounding clamp

Abstract

The invention discloses a welding grounding clamp which comprises two clamping arms, the middles of the two clamping arms are hinged to each other, the two ends of each clamping arm are a clamping end and a pressing end respectively, the two clamping arms generate clamping force at the clamping ends through clamping springs, and the two clamping ends can be opened by pressing the pressing ends; the clamping arm is provided with a wiring terminal and a conductive piece arranged at the clamping end, the wiring terminal comprises a binding post and a wiring ring which is used for being connected with a wire and can be sleeved into the binding post, the binding post is provided with a limiting piece which can elastically extend out of the binding post and can be retracted into the binding post, and when the limiting piece extends out, the wiring ring can be limited to exit from the binding post; the limiting piece is provided with the abutting piece which extends out towards the wiring ring and elastically abuts against the wiring ring, the wiring ring can be rapidly installed by pressing the limiting piece, the wiring ring is limited to exit, meanwhile, the wiring ring is elastically abutted against the wiring ring through the abutting piece, the wiring ring and the binding post can keep good electrical communication, and the reliability and stability of electrical connection are high.

Description

Technical Field

[0001] The invention relates to the technical field of welding equipment, and in particular to a welding grounding clamp. Background Art

[0002] The welding grounding clamp is a common grounding device, which fixes the grounding wire of the welding power source to the metal part that needs to be grounded. The welding grounding clamp can adapt to metal parts of different shapes and sizes and is suitable for a variety of occasions and environments; however, the current grounding clamp generally compresses the connecting wire through a nut or a screw to maintain the electrical connection between the grounding clamp and the welding power source. However, in actual application, the clamping position of the grounding clamp needs to be clamped in a more tricky position with limited operating space, so that the operator often needs to rotate the grounding clamp to the corresponding angle, which can easily cause the wire to twist, etc., causing torque at the wiring position, which can easily cause the thread to loosen, affecting the reliability of the electrical connection, and then affecting the normal progress of the welding operation and the welding efficiency. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a welding grounding clamp, which can improve the reliability and stability of the electrical connection between the welding grounding clamp and the wire.

[0004] According to the first aspect of the present invention, a welding grounding clamp comprises: two clamping arms hinged to each other in the middle, the two ends of the clamping arms are respectively a clamping end and a pressing end, the two clamping arms generate a clamping force at the clamping end through a clamping spring, and pressing the pressing end can open the two clamping ends; the clamping arm is provided with a wiring terminal and a conductive member arranged at the clamping end, the wiring terminal comprises a wiring post and a wiring ring for connecting to a wire and capable of being inserted into the wiring post, the wiring post is provided with a limiting member that can elastically extend out of the wiring post and can be retracted into the wiring post, and the limiting member can limit the wiring ring from exiting the wiring post when extended, and the limiting member is provided with a pressing member that extends toward the wiring ring and elastically presses the wiring ring.

[0005] A welding grounding clamp according to an embodiment of the present invention has at least the following beneficial effects: by pressing the limit member, the wiring ring can be quickly installed and the withdrawal of the wiring ring can be restricted; at the same time, the wiring ring is elastically pressed by the pressing member, so that the wiring ring and the terminal can maintain good electrical connection, and the reliability and stability of the electrical connection are high.

[0006] According to some embodiments of the present invention, the terminal is provided with an inner groove extending in a radial direction thereof, the limiting member is slidably disposed in the inner groove, and a limiting spring capable of driving the limiting member to elastically extend is disposed in the inner groove.

[0007] According to some embodiments of the present invention, two limiting members are configured and are relatively distributed on two sides of the terminal.

[0008] According to some embodiments of the present invention, a limiting structure capable of limiting the limiting member from completely sliding out of the inner groove is provided between the limiting member and the inner groove.

[0009] According to some embodiments of the present invention, the limiting member is provided with a slide groove extending along the axial direction of the terminal, the pressing member is slidably disposed in the slide groove, and a pressing spring capable of driving the pressing member to elastically extend toward the terminal ring is arranged in the slide groove.

[0010] According to some embodiments of the present invention, when the pressing member presses the wiring ring, the pressing member is partially located in the sliding groove, and the pressing member blocks the limiting member from sliding into the inner groove.

[0011] According to some embodiments of the present invention, the welding grounding clamp also includes a clamping locking mechanism, which includes a first connecting member and a second connecting member, one end of the first connecting member can be rotatably connected to one of the pressing ends, the other end of the first connecting member can be rotatably connected to one end of the second connecting member, and the other end of the second connecting member can be rotatably connected to the other pressing end, and the first connecting member is slidably provided with a locking member, and when the two clamping arms are opened to a set position, the locking member can slide to cooperate with the second connecting member to lock the relative positions of the first connecting member and the second connecting member, thereby positioning the two clamping arms at the set position.

[0012] According to some embodiments of the present invention, a magnet is disposed in the locking member, the first connecting member and the second connecting member are made of magnetic materials, and the locking member can be fixed to the first connecting member or the second connecting member by magnetic attraction of the magnet.

[0013] According to some embodiments of the present invention, when the two clamping arms are opened to the set position, the first connecting member and the second connecting member are distributed in a straight line, and the locking member can be slidably mounted on the end of the second connecting member to limit the relative rotation of the first connecting member and the second connecting member, thereby positioning the two clamping arms at the set position.

[0014] According to some embodiments of the present invention, the clamping end is provided with an extension structure protruding toward the inner side of the clamping end, the conductive member is an elongated metal plate, the metal plate is arched toward the inner side of the clamping end and is wound around the extension structure, and both ends of the metal plate are fixed to the clamping end.

[0015] According to some embodiments of the present invention, the extension structure includes two inner extension arms respectively located on both sides of the clamping end and protruding toward the inner side of the clamping end, a support shaft is arranged between the two inner extension arms, and the metal plate extends from the clamping end to the support shaft and returns to the clamping end after bypassing the outer side of the support shaft.

[0016] According to some embodiments of the present invention, the cross section of the support shaft is an eccentric structure, the support shaft is rotatably disposed on the inner extension arm, and the support shaft is provided with a driving structure capable of driving the support shaft to rotate.

[0017] According to some embodiments of the present invention, the driving structure is a hexagonal socket provided at the end of the supporting shaft.

[0018] According to some embodiments of the present invention, the width of the metal plate corresponds to the inner width of the two inner extension arms;

[0019] The inner width of the two inner extension arms of one of the clamping ends is greater than the outer width of the two inner extension arms of the other clamping end.

[0020] According to some embodiments of the present invention, the metal plates at the two clamping ends are electrically connected via a metal braid. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 It is a structural schematic diagram of a welding grounding clamp according to an embodiment of the present invention;

[0023] Figure 2 It is a schematic diagram of the lateral structure of the welding grounding clamp according to an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of the welding grounding clamp after the conductive member is hidden in an embodiment of the present invention;

[0025] Figure 4 is a schematic diagram of the cross-sectional structure of a connection terminal according to an embodiment of the present invention;

[0026] Figure 5 A front view of a welding grounding clamp according to an embodiment of the present invention;

[0027] Figure 6 A schematic structural diagram of a welding grounding clamp according to an embodiment of the present invention configured with a supporting shaft having an eccentric structure;

[0028] Figure 7 It is a schematic diagram of the cross-sectional structure of the contact point between the support shaft and the metal plate of the eccentric structure of an embodiment of the present invention.

[0029] Reference numerals:

[0030] Clamping arm 100, clamping end 110, pressing end 120;

[0031] The connecting terminal 200, the connecting post 210, the inner groove 211, the limiting member 220, the limiting spring 221, the sliding groove 222, the pressing member 230, the pressing spring 231, the connecting ring 240, and the connecting post 250;

[0032] A first connecting member 310, a second connecting member 320, a locking member 330, and a pin 340;

[0033] Metal plate 500, inner extension arm 510, support shaft 520, hexagon socket hole 521, metal braid 530;

[0034] Auxiliary arm 610, auxiliary shaft 620;

[0035] Clamping spring 900 and rotating shaft 910. DETAILED DESCRIPTION

[0036] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0037] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0038] In the description of the present invention, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0039] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0040] Reference below Figures 1 to 7 A welding grounding clamp according to an embodiment of the present invention is described.

[0041] like Figures 1 to 3As shown, a welding grounding clamp according to an embodiment of the present invention comprises: two clamping arms 100 hinged to each other at the middle, the two ends of the clamping arms 100 are respectively a clamping end 110 and a pressing end 120, the two clamping arms 100 generate a clamping force at the clamping end 110 through a clamping spring 900, and pressing the pressing end 120 can open the two clamping ends 110; the clamping arm 100 is provided with a terminal 200 and a conductive member arranged at the clamping end 110, the terminal 200 comprises a terminal 210 and a terminal ring 240 for connecting with a wire and capable of being inserted into the terminal 210, the terminal 210 is provided with a limiting member 220 which can elastically extend out of the terminal 210 and can be retracted into the terminal 210, and when the limiting member 220 is extended, it can limit the terminal ring 240 from exiting the terminal 210, and the limiting member 220 is provided with a pressing member 230 which extends toward the terminal ring 240 and elastically presses the terminal ring 240.

[0042] By pressing the limiter 220, the wiring ring 240 can be quickly installed and restricted from being withdrawn. At the same time, the pressing member 230 elastically presses the wiring ring 240, so that the wiring ring 240 and the terminal 210 can maintain good electrical connection, and the reliability and stability of the electrical connection are high.

[0043] Specifically, the terminal ring 240 is connected to the wire of the welding machine by soldering, winding, etc. When connecting, the limiter 220 is pressed inward to shrink it into the terminal post 210. The terminal ring 240 passes through the limiter 220 and is inserted into the root of the terminal post 210. The limiter 220 is released and pops out. The limiter 220 restricts the terminal ring 240 from withdrawing. At the same time, the pressing member 230 presses the terminal ring 240 to maintain the compactness of the contact. At the same time, the terminal ring 240 can rotate around the terminal post 210. When the angle of the welding grounding clamp is adjusted, a good electrical connection effect can still be maintained.

[0044] like Figure 1 , Figure 2 As shown, in some embodiments of the present invention, the two clamping arms 100 are relatively distributed, and a hinge portion extends inward from the middle, and the hinge portion is connected by a rotating shaft 910. The clamping spring 900 is a torsion spring arranged at the rotating shaft 910, so that when the two pressing ends 120 are pressed, the two clamping ends 110 can move away from each other and open.

[0045] In some embodiments of the present invention, an insulating sleeve is provided outside the pressing end 120 to facilitate operators to press and operate the welding grounding clamp.

[0046] like Figure 1 As shown, in some embodiments of the present invention, the terminal 210 is fixedly connected to the clamping arm 100 and connected to the conductive member. The clamping arm 100 is made of a conductive material such as copper, iron, etc. The terminal ring 240 is pressed to the root of the terminal 210 and abuts against the clamping arm 100 to maintain a better electrical connection effect.

[0047] Specifically, the terminal post 210 is installed to the clamping arm 100 through a connecting post 250 and fixes the metal plate 500. The connecting post 250 can be installed to the clamping arm 100 by screws, bolts, or riveting structures.

[0048] It can be understood that in some embodiments of the present invention, a receiving step surface corresponding to the terminal ring 240 can be provided on the terminal post 210, so that the terminal ring 240 is pressed onto the receiving step surface of the terminal post 210, and the electrical connection can also have higher reliability.

[0049] like Figure 1 , Figure 2 As shown, in some embodiments of the present invention, wiring terminals 200 are provided on both clamping arms 100 to facilitate wiring.

[0050] like Figure 4 As shown, in some embodiments of the present invention, the terminal 210 is provided with an inner groove 211 extending along its radial direction, and the limit member 220 can be slidably arranged in the inner groove 211. A limit spring 221 capable of driving the limit member 220 to elastically extend is arranged in the inner groove 211. The limit spring 221 can keep the limit member 220 extending out of the terminal 210, and pressing the limit member 220 can make it completely retract into the terminal 210 to facilitate the installation of the terminal ring 240.

[0051] Specifically, in order to achieve a better electrical connection effect, the terminal ring 240 is configured to fit tightly with the terminal post 210 or leave only a small gap. When the limit member 220 is completely retracted into the terminal post 210, the terminal ring 240 can be inserted into the terminal post 210 without any obstacles. After the terminal ring 240 passes through the limit member 220, the limit member 220 can automatically pop out under the action of the limit spring 221 to form a limit structure.

[0052] like Figure 4 As shown, in some embodiments of the present invention, two limiting members 220 are configured and are relatively distributed on two sides of the terminal 210 to balance the limiting effect and the pressing effect of the pressing member 230 .

[0053] It can be understood that, in some embodiments of the present invention, the limiting member 220 can be configured as one, three or more, which will not be described in detail herein.

[0054] In some embodiments of the present invention, the outer end of the limiting member 220 is a pointed structure to facilitate its extension out of the inner groove 211 .

[0055] In some embodiments of the present invention, a limiting structure is provided between the limiting member 220 and the inner groove 211 , which can limit the limiting member 220 from completely sliding out of the inner groove 211 , so as to prevent the limiting member 220 from completely separating from the terminal 210 and becoming ineffective.

[0056] Specifically, the limiting structure may be a limiting step structure, a limiting pin, etc. For example, an outwardly protruding step is set at the tail end of the limiting member 220, and an inwardly protruding step is set at the opening of the inner groove 211. The two steps cooperate with each other to limit the limiting member 220 from completely separating from the inner groove 211.

[0057] It can be understood that in some embodiments of the present invention, the limit member 220 can also be configured to be rotatably installed on the outer wall of the terminal post 210, and a recess corresponding to the limit member 220 is set on the outer wall of the terminal post 210. One end of the limit member 220 can be rotatably connected to the terminal post 210, so that the limit member 220 can be rotated to extend outside the terminal post 210, or rotated into the recess, thereby meeting the avoidance and blocking requirements of the terminal ring 240.

[0058] like Figure 4 As shown, in some embodiments of the present invention, the limiting member 220 is provided with a slide groove 222 extending along the axial direction of the terminal 210, and the pressing member 230 can be slidably arranged in the slide groove 222. A pressing spring 231 capable of driving the pressing member 230 to elastically extend toward the terminal ring 240 is arranged in the slide groove 222. The pressing member 230 can be elastically pressed against the terminal ring 240 through the pressing spring 231, thereby maintaining a better electrical contact effect.

[0059] Specifically, the terminal 210, the limiting member 220, and the pressing member 230 are all conductive components, such as metal components, so as to maintain the conductive performance of the entire mechanism.

[0060] In some embodiments of the present invention, the pressing member 230 may be a copper column, a copper block, etc., and a smooth transition structure such as a hemispherical shape is provided at the abutting end of the pressing member 230 so that the wiring ring 240 can rotate smoothly.

[0061] like Figure 4 As shown, in some embodiments of the present invention, when the pressing member 230 presses against the wiring ring 240, the pressing member 230 is partially located in the slide groove 222, and the pressing member 230 blocks the limiting member 220 from sliding into the inner groove 211, thereby reducing the situation where the limiting member 220 accidentally slides into the inner groove 211 and causes the wiring structure to fail.

[0062] It is understandable that in some embodiments of the present invention, the pressing member 230 may be a metal spring sheet disposed on the limiting member 220 , such as a metal spring sheet bent into a V-shape, which may also achieve the effect of pressing the wiring ring 240 .

[0063] like Figures 1 to 3As shown, in some embodiments of the present invention, the welding grounding clamp also includes a clamping locking mechanism, which includes a first connecting member 310 and a second connecting member 320. One end of the first connecting member 310 can be rotatably connected to one of the pressing ends 120, and the other end of the first connecting member 310 can be rotatably connected to one end of the second connecting member 320. The other end of the second connecting member 320 can be rotatably connected to the other pressing end 120. The first connecting member 310 is slidably provided with a locking member 330. When the two clamping arms 100 are opened to the set position, the locking member 330 can slide to cooperate with the second connecting member 320 to lock the relative position of the first connecting member 310 and the second connecting member 320, thereby positioning the two clamping arms 100 at the set position, thereby locking the positions of the two clamping ends 110. Even if vibration and impact are encountered, the grounding clamp is not easy to fall off, thereby improving the reliability of grounding.

[0064] Specifically, the first connecting member 310 , the second connecting member 320 and the two pressing ends 120 form a four-bar linkage, so the positions of the two pressing ends 120 can be locked by only locking the first connecting member 310 and the second connecting member 320 .

[0065] like Figure 1 , Figure 3 As shown, in some embodiments of the present invention, the first connecting member 310 and the second connecting member 320 are respectively provided with guide grooves extending in the up-down direction, and the locking member 330 includes two plates distributed on both sides of the first connecting member 310 and the second connecting member 320, and the two plates are connected by a connecting portion, and the connecting portion is placed in the guide groove so that the two plates can slide in the up-down direction.

[0066] Specifically, the first connecting member 310 and the second connecting member 320 are both plate structures. When the two plates of the locking member 330 are respectively placed on both sides of the junction of the first connecting member 310 and the second connecting member 320, the rotation of the first connecting member 310 and the second connecting member 320 can be restricted, thereby achieving a locking effect.

[0067] like Figures 1 to 3 As shown, in some embodiments of the present invention, when the two clamping arms 100 are opened to the set position, the first connecting member 310 and the second connecting member 320 are distributed in a straight line, and the locking member 330 can be slidably mounted on the end of the second connecting member 320 to limit the relative rotation of the first connecting member 310 and the second connecting member 320, thereby positioning the two clamping arms 100 at the set position.

[0068] Specifically, the locking member 330 is provided with a recess corresponding to the second connecting member 320 , so that the locking member 330 can slide to the end of the second connecting member 320 and be sleeved on the outside of the second connecting member 320 , thereby limiting the relative rotation of the first connecting member 310 and the second connecting member 320 .

[0069] like Figures 1 to 3 As shown, in some embodiments of the present invention, the locking member 330 can be fixed to the first connecting member 310 and the second connecting member 320 by means of pins 340 , respectively, so as to locate the position of the locking member 330 .

[0070] Specifically, the locking member 330 , the first connecting member 310 , and the second connecting member 320 are provided with corresponding latch holes.

[0071] In some embodiments of the present invention, the first connecting member 310 or the second connecting member 320 is provided with a plurality of pin holes (not shown in the figure) spaced apart in the up and down directions. By inserting the pins 340 into different pin holes, the locking positions of the two pressing ends 120 can be adjusted, thereby adjusting the clamping positions of the two clamping ends 110 to adapt to clamped objects of different thicknesses.

[0072] It is understandable that in some embodiments of the present invention, the first connecting member 310 or the second connecting member 320 can be telescopically connected to the pressing end 120 to facilitate adjustment of the clamping position of the two clamping ends 110 when the first connecting member 310 and the second connecting member 320 are locked.

[0073] Specifically, a rotating seat can be rotatably set at the pressing end 120, and the rotating seat is provided with a through hole for the first connecting member 310 or the second connecting member 320 to slide. The rotating seat and the first connecting member 310 or the second connecting member 320 are positioned relative to each other through mechanisms such as ratchets and latches, thereby realizing the adjustment of the connection position of the first connecting member 310 or the second connecting member 320.

[0074] In some embodiments of the present invention, a magnet is provided in the locking member 330, and the first connecting member 310 and the second connecting member 320 are made of magnetic materials. The locking member 330 can be fixed to the first connecting member 310 or the second connecting member 320 by magnetic attraction, so that the locking member 330 can be temporarily fixed, especially after the first connecting member 310 and the second connecting member 320 are unlocked, the locking member 330 can be temporarily fixed to the upper position of the first connecting member 310 by magnetic attraction to prevent it from accidentally falling and locking the second connecting member 320, affecting the normal opening of the welding grounding clamp.

[0075] like Figure 1 , Figure 2 As shown, in some embodiments of the present invention, the clamping end 110 is provided with an extension structure protruding toward the inner side of the clamping, the conductive member is a long metal plate 500, the metal plate 500 is arched toward the inner side of the clamping and is wound around the extension structure, both ends of the metal plate 500 are fixed to the clamping end 110, and a clamping conductive part is formed by the arched part of the metal plate 500, thereby improving the reliability of clamping conduction.

[0076] Of course, in the specific implementation process, the conductive member can also be arranged flatly on the clamping end 110, which can also meet the conductivity requirements.

[0077] like Figures 1 to 3 As shown, in some embodiments of the present invention, the extension structure includes two inner extension arms 510 respectively located on both sides of the clamping end 110 and protruding toward the inner side of the clamping end, a support shaft 520 is arranged between the two inner extension arms 510, and the metal plate 500 extends from the clamping end 110 to the support shaft 520 and bypasses the outer side of the support shaft 520 and then returns to the clamping end 110, thereby forming an arched metal plate 500.

[0078] Specifically, the middle part of the metal plate 500 is fixed to the clamping end 110 through the connecting column 250, and then the end extends toward the support shaft 520, bypasses the outer side of the support shaft 520 and returns to the clamping end 110, and is fixed to the clamping end 110 through a clamping mechanism, a screw mechanism, a welding structure, etc.

[0079] like Figures 1 to 3 As shown, in some embodiments of the present invention, the inner extension arm 510 is arranged at the outer edge of the clamping end 110, and auxiliary arms 610 protruding toward the inner side of the clamping are respectively arranged on both sides of the middle part of the clamping end 110, and an auxiliary shaft 620 is arranged between the two auxiliary arms 610. The two ends of the metal plate 500 are respectively fixed to the clamping end 110, and the middle part of the metal plate 500 is fixed and electrically connected by the connecting column 250. The support shaft 520 and the auxiliary shaft 620 are respectively located on both sides of the connecting column 250 to form a double arch structure, which improves the compactness of the mechanism. The metal plate 500 has good stability, which improves the reliability of the electrical connection.

[0080] Specifically, the height of the auxiliary arm 610 is smaller than the height of the inner extension arm 510 to avoid affecting the normal connection function at the inner extension arm 510 .

[0081] like Figure 5 As shown, in some embodiments of the present invention, the width of the metal plate 500 corresponds to the inner width of the two inner extension arms 510; the inner width of the two inner extension arms 510 of one clamping end 110 is greater than the outer width of the two inner extension arms 510 of the other clamping end 110, so that the arched metal plate 500 at at least one clamping end 110 is in a state of being directly clamped, so that it maintains good electrical contact with the clamped object.

[0082] Specifically, Figure 5As shown, the inner width of the two inner extension arms 510 of the lower clamping end 110 is greater than the outer width of the two inner extension arms 510 of the upper clamping end 110, forming a structure in which the inner extension arms 510 are staggered, reducing the influence of the inner extension arms 510 on the clamping conductive structure, so that the metal plate 500 on the support shaft 520 of the lower clamping end 110 is clamped as a whole by the extension structure of the upper clamping end 110, and can maintain good electrical contact with the clamped object.

[0083] like Figure 1 , Figure 2 As shown, in some embodiments of the present invention, the metal plates 500 of the two clamping ends 110 are electrically connected via a metal braid 530 , so that the upper and lower metal plates 500 are electrically connected, further improving the reliability of the electrical connection.

[0084] Specifically, the metal braid 530 is woven from conductive metal wires such as copper wires, has a certain degree of flexibility, and has good conductive properties. It is used to connect the metal plate 500 of the two clamping ends 110, and is not prone to breakage after long-term use, and has high reliability. During specific use, due to the shape of the clamped object, the welding grounding clamp may have only one clamping end 110 that is in good contact with the clamped object. At this time, the two clamping ends 110 can be electrically connected through the metal braid 530, so that no matter whether the welding machine's wire is connected to the upper or lower terminal 200, it can be electrically connected to the clamped object, thereby improving the reliability of use.

[0085] It can be understood that in some embodiments of the present invention, the metal spring sheet can be used to replace the metal braid 530, which can also meet the electrical connection requirements of the upper and lower metal plates 500 and can also serve as a reset elastic force. At this time, the metal spring sheet is arranged at the pressing end 120 to provide elastic force for clamping the welding grounding clamp.

[0086] like Figure 6 , Figure 7 As shown, in some embodiments of the present invention, the cross-section of the support shaft 520 is an eccentric structure, and the support shaft 520 can be rotatably disposed on the inner extension arm 510. The support shaft 520 is provided with a driving structure capable of driving it to rotate. By rotating the support shaft 520, the metal plate 500 can be made to bulge outward through the eccentric convex part, thereby improving the electrical contact effect between it and the clamped object, and by rotating the support shaft 520, the metal plate 500 can be tightened to improve the reliability of the electrical connection.

[0087] Specifically, after frequent clamping, the fixing structure of the metal plate 500 is very likely to become loose, or the metal plate 500 is stretched and lengthened (generally, copper plates have a certain ductility). At this time, it is easy to cause the gap between the metal plate 500 and the support shaft 520, the connecting column 250, etc. to be too large, resulting in poor clamping effect or unstable electrical connection. By rotating the support shaft 520 and utilizing the eccentric convex part to make the metal plate 500 convex, the metal plate 500 can be tightened, thereby improving the compactness of the structure, allowing the welding grounding clamp to maintain a better clamping effect and electrical connection effect, and extending the service life of the welding grounding clamp.

[0088] like Figure 6 As shown, in some embodiments of the present invention, the driving structure is a hexagonal hole 521 provided at the end of the support shaft 520 to facilitate the rotation of the support shaft 520 by a hexagonal wrench.

[0089] It can be understood that in some embodiments of the present invention, the driving structure may also be a knob, a cross slot, etc., which will not be described in detail here.

[0090] Of course, the invention is not limited to the above-mentioned embodiments, and those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the invention, and these equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A welding grounding clamp, characterized in that: include: Two clamping arms (100) are hinged to each other at the middle, and the two ends of the clamping arm (100) are respectively a clamping end (110) and a pressing end (120). The two clamping arms (100) generate a clamping force at the clamping end (110) through a clamping spring (900), and pressing the pressing end (120) can open the two clamping ends (110); The clamping arm (100) is provided with a terminal (200) and a conductive member arranged at the clamping end (110); the terminal (200) comprises a terminal (210) and a terminal ring (240) for connecting with a wire and capable of being inserted into the terminal (210); the terminal (210) is provided with a limiting member (220) capable of elastically extending out of the terminal (210) and being capable of being retracted into the terminal (210); when the limiting member (220) is extended, it can limit the terminal ring (240) from withdrawing from the terminal (210); the limiting member (220) is provided with a pressing member (230) extending toward the terminal ring (240) and elastically pressing the terminal ring (240).

2. A welding grounding clamp according to claim 1, characterized in that: The terminal (210) is provided with an inner groove (211) extending in its radial direction, the limiting member (220) is slidably arranged in the inner groove (211), and a limiting spring (221) capable of driving the limiting member (220) to elastically extend is arranged in the inner groove (211).

3. A welding grounding clamp according to claim 2, characterized in that: The limiting members (220) are provided with two and are relatively distributed on two sides of the connecting post (210).

4. A welding grounding clamp according to claim 2, characterized in that: A limiting structure capable of limiting the limiting member (220) from completely sliding out of the inner groove (211) is provided between the limiting member (220) and the inner groove (211).

5. A welding grounding clamp according to claim 2 or 3, characterized in that: The limiting member (220) is provided with a slide groove (222) extending along the axial direction of the terminal (210), and the pressing member (230) can be slidably arranged in the slide groove (222). A pressing spring (231) capable of driving the pressing member (230) to elastically extend toward the terminal ring (240) is arranged in the slide groove (222).

6. A welding grounding clamp according to claim 5, characterized in that: When the pressing member (230) presses against the wiring ring (240), a portion of the pressing member (230) is located in the sliding groove (222), and the pressing member (230) blocks the limiting member (220) from sliding into the inner groove (211).

7. A welding grounding clamp according to claim 1, characterized in that: The invention also includes a clamping and locking mechanism, which includes a first connecting member (310) and a second connecting member (320), one end of the first connecting member (310) can be rotatably connected to one of the pressing ends (120), the other end of the first connecting member (310) can be rotatably connected to one end of the second connecting member (320), the other end of the second connecting member (320) can be rotatably connected to the other pressing end (120), the first connecting member (310) can be slidably provided with a locking member (330), when the two clamping arms (100) are opened to the set position, the locking member (330) can slide to cooperate with the second connecting member (320), lock the relative position of the first connecting member (310) and the second connecting member (320), thereby positioning the two clamping arms (100) at the set position.

8. A welding grounding clamp according to claim 7, characterized in that: When the two clamping arms (100) are opened to the set position, the first connecting member (310) and the second connecting member (320) are arranged in a straight line, and the locking member (330) can be slidably mounted on the end of the second connecting member (320) to limit the relative rotation of the first connecting member (310) and the second connecting member (320), thereby positioning the two clamping arms (100) at the set position.

9. The welding grounding clamp according to claim 1, characterized in that: The clamping end (110) is provided with an extension structure protruding toward the inner side of the clamping end, the conductive member is an elongated metal plate (500), the metal plate (500) is arched toward the inner side of the clamping end and is wound around the extension structure, and both ends of the metal plate (500) are fixed to the clamping end (110).

10. A welding grounding clamp according to claim 9, characterized in that: The extension structure comprises two inner extension arms (510) respectively located on both sides of the clamping end (110) and protruding toward the inner side of the clamping end, a support shaft (520) is arranged between the two inner extension arms (510), and the metal plate (500) extends from the clamping end (110) to the support shaft (520) and returns to the clamping end (110) after bypassing the outer side of the support shaft (520).

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