Limiting structure and remote control electrode holder

Abstract

The utility model relates to the technical field of metal welding devices, in particular to a limiting structure and a remote control electric welding clamp, which comprise a limiting unit and a clamp body unit, the limiting unit comprises a shell, a bottom table, an elastic extrusion piece, a connecting rod assembly and a fixing shaft, and the clamp body unit is arranged in the clamp body unit. The clamp body unit comprises a handle piece and a remote control piece. The welding rod clamping device has the advantages that when a welding rod is not clamped, the baffle shields the button positioning hole, the elastic button is prevented from being pressed to cause danger, after the welding rod is clamped, the elastic extrusion piece is extruded downwards to drive the elastic connector to stretch into the arc-shaped groove, the elastic connector is hinged to the connecting rod, and the connecting rod is movably connected with the connecting column; therefore, the connecting rod deflects, the baffle does not shield the button positioning hole any more, and at the moment, the elastic button can be pressed for operation.

Description

Technical Field

[0001] The utility model relates to the technical field of metal welding devices, in particular to a limiting structure and a remote-controlled electric welding clamp. Background Art

[0002] When operators replace welding rods, they usually hold the welding rod and put it into the welding tongs. If the protective gloves are wet at this time, the water will form a conductor, and a pathway will be formed between the welding machine and the human body. We will be electrocuted when holding the welding rod. In the mildest case, the welding rod will be dropped immediately after being electrocuted. In the worst case, a safety accident will occur. This is very dangerous for welding operations. When working on a construction site, due to the large site, the welding machine is usually dozens of meters or several floors away from the work point, and it is troublesome to turn on and off the welding machine. In order to prevent danger, a limit mechanism should be set when the welding rod is not clamped. Utility Model Content

[0003] In view of the above-mentioned safety issues when the welding rod is not clamped in the prior art, the present utility model is proposed.

[0004] The utility model aims to provide a limiting structure, which aims to solve the problem that the limiting plate blocks the operating button when the welding rod is not clamped.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: a limiting structure, which includes a limiting unit, the limiting unit includes a shell, a base, an elastic extrusion piece, a connecting rod assembly and a fixed shaft, the base is movably connected to the shell through the fixed shaft, one end of the elastic extrusion piece is fixedly arranged on the shell, and the connecting rod assembly is movably connected to the elastic extrusion piece.

[0006] As a preferred solution of the limiting structure of the utility model, wherein: the shell includes a limiting plate, a first groove, a second groove, an elastic button and an axis connecting hole, the limiting plate divides the shell into a first accommodating space and a second accommodating space, the first groove is arranged in the first accommodating space, the second groove is arranged in the second accommodating space, the elastic button is arranged on the bottom side of the shell, and the axis connecting hole is arranged on both sides of the shell.

[0007] As a preferred scheme of the limiting structure of the utility model, wherein: the limiting plate includes a card slot and a first connecting slot, the card slot is arranged on the limiting plate, the first connecting slot is arranged on both sides of the card slot, the first groove includes a first positioning hole, a second positioning hole and a limiting groove, the first positioning hole is arranged on the bottom side of one end of the first groove, the limiting groove is arranged on the bottom side of the other end of the first groove, the second positioning hole is arranged on both sides of the first positioning hole, the second groove includes a button positioning hole, and the button positioning hole is arranged on the bottom side of the second groove.

[0008] As a preferred scheme of the limiting structure of the utility model, wherein: the base includes a welding rod limiting groove, a connecting boss, a second connecting groove, a positioning groove and a limiting block, the welding rod limiting groove is arranged at one end of the base, the limiting block is arranged at the other end of the base, the connecting boss is arranged between the welding rod limiting groove and the limiting block, the positioning groove is arranged between the connecting boss and the limiting block, and the second connecting groove is arranged on both sides of the base.

[0009] As a preferred scheme of the limiting structure of the utility model, wherein: the welding rod limiting groove includes a third positioning hole, the third positioning hole is arranged in the middle of the welding rod limiting groove, the connecting boss includes a boss connecting hole, the boss connecting hole is arranged on the connecting boss, the boss connecting hole is movably connected to the fixed shaft, the second connecting groove includes a connecting column and a third connecting hole, the connecting column is arranged in the second connecting groove, the third connecting hole is arranged in the second connecting groove, and the third connecting hole is arranged on the side of the second connecting groove close to the welding rod limiting groove.

[0010] As a preferred solution of the limiting structure of the utility model, wherein: the elastic extrusion member includes a first elastic member and an extrusion head, one end of the first elastic member is fixedly arranged in the first positioning hole, the other end of the first elastic member is fixedly connected to the extrusion head, and the extrusion head includes an arc groove, and the arc groove is arranged on both sides of the extrusion head.

[0011] As a preferred solution of the limiting structure of the utility model, wherein: the connecting rod assembly includes a connecting rod and an elastic connecting head, and the elastic connecting head is hingedly connected to the connecting rod.

[0012] As a preferred scheme of the limiting structure of the utility model, wherein: the connecting rod includes a first connecting hole, a second connecting hole and a baffle, the first connecting hole is arranged at one end of the connecting rod, the second connecting hole is arranged on one side of the first connecting hole, the baffle is arranged at the other end of the connecting rod, the second connecting hole is movably connected to the connecting column, the elastic connecting head includes a second elastic member and a connecting head, one end of the second elastic member is fixedly arranged on the connecting head, the other end of the second elastic member is arranged in the second positioning hole, the connecting head includes a groove, the groove is arranged on the connecting head, a connecting shaft is arranged in the groove, and the connecting shaft is movably connected to the first connecting hole.

[0013] The beneficial effects of the limiting structure of the utility model are as follows: when the welding rod is not clamped, the baffle blocks the button positioning hole to prevent the elastic button from being pressed and causing danger; when the welding rod is clamped, the elastic extrusion piece is squeezed downward to drive the elastic connecting head into the arc groove, the elastic connecting head is hingedly connected to the connecting rod, and the connecting rod is movably connected to the connecting column, so that the connecting rod is deflected, and the baffle no longer blocks the button positioning hole, at which time the elastic button can be pressed to operate.

[0014] Another object of the utility model is to provide a remote-controlled electric welding tongs, which aims to solve the problem of turning the welding machine on and off through a remote control component.

[0015] In order to solve the above technical problems, the utility model also provides the following technical solutions: a remote-controlled welding pliers, which includes a limiting structure; and a pliers body unit, wherein the limiting unit is arranged in the pliers body unit, and the pliers body unit includes a handle member and a remote control member, the handle member is arranged in a first groove, and the remote control member is arranged in a second accommodating space.

[0016] As a preferred solution of the utility model remote-controlled welding pliers, wherein: the handle member includes a chuck, a hand-holding portion, a connecting groove, a reset elastic member and a handle connecting hole, the chuck is arranged at one end of the handle member, the hand-holding portion is arranged at the other end of the handle member, the connecting groove is arranged in the handle member, one end of the reset elastic member is fixedly arranged on the bottom side of the connecting groove, the handle connecting hole is movably connected to the fixed shaft, and the remote control member includes an elastic button block, the elastic button block is arranged on the remote control member, and the elastic button block is movably connected to the baffle.

[0017] The remote control electric welding tongs of the utility model have the following beneficial effects: the on and off of the electric welding tongs are controlled by the remote control component arranged in the shell, so that the operator can turn the welding machine on and off through the electric welding tongs even if he is far away from the welding machine during operation; when the handle component and the base clamp the welding rod, the elastic button is pressed to squeeze the elastic button block, thereby controlling the on and off of the welding machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following is a brief introduction to the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0019] Figure 1 This is a cross-sectional structural diagram of the limiting unit in the present utility model.

[0020] Figure 2 It is a cross-sectional view of the housing of the limiting unit in the present utility model.

[0021] Figure 3 This is a diagram showing the shell structure in the present utility model.

[0022] Figure 4 This is a diagram showing the structure of the elastic extrusion piece and the connecting rod assembly in the utility model.

[0023] Figure 5 This is a diagram showing the base structure in the present utility model.

[0024] Figure 6 This is a diagram showing the structure of the remote-controlled electric welding tongs in the present utility model.

[0025] Figure 7 It is a cross-sectional view of the remote-controlled electric welding tongs in the utility model. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0029] Example 1

[0030] Reference Figure 1 , which is the first embodiment of the utility model, and this embodiment provides a limiting structure. The limiting unit 100 includes a shell 101, a base 102, an elastic extrusion piece 103, a connecting rod assembly 104 and a fixed shaft 105.

[0031] Preferably, the limiting unit 100 includes a shell 101, a base 102, an elastic extrusion piece 103, a connecting rod assembly 104 and a fixed shaft 105. One end of the base 102 is arranged under the limiting plate of the shell 101. The connecting boss on the base 102 is connected to the shell 101 through the fixed shaft 105, so that the base 102 and the shell 101 form a limit. The bottom end of the elastic extrusion piece 103 is fixedly arranged on the shell 101, and the bottom end of the connecting rod assembly 104 is also fixedly arranged on the shell 101. The connecting rod assembly 104 is movably connected to the elastic extrusion piece 103. An arc groove is arranged on the elastic extrusion piece 103, and the connecting rod assembly 104 is movably connected to the shell 101.

[0032] When in use, the connecting rod assembly 104 is movably connected to the elastic extrusion piece 103. When the elastic extrusion piece 103 is not squeezed, the connecting rod assembly 104 contacts the elastic extrusion piece 103. When the connecting rod assembly 104 is movably connected to the shell 101, the end of the connecting rod assembly 104 away from the elastic extrusion piece 103 blocks the button positioning hole on the lower side of the shell 101. After the elastic extrusion piece 103 is squeezed, the elastic extrusion piece 103 moves downward, and the connecting rod assembly 104 contacts the arc groove on the elastic extrusion piece 103. The connecting rod assembly 104 extends into the arc groove, so that the end of the connecting rod assembly 104 away from the elastic extrusion piece 103 no longer blocks the button positioning hole on the lower side of the shell 101. At this time, the limit unit releases the limit state, which is convenient for the operator to operate.

[0033] Example 2

[0034] Reference Figure 1 to Figure 5 , which is the second embodiment of the utility model. Different from the previous embodiment, the shell 101 includes a limiting plate 101a, a first groove 101b, a second groove 101c, an elastic button 101d and a shaft connecting hole 101e. The limiting plate 101a divides the shell 101 into a first accommodating space A and a second accommodating space B. The first groove 101b is arranged in the first accommodating space A, and the second groove 101c is arranged in the second accommodating space B. The elastic button 101d is arranged on the bottom side of the shell 101, and the middle limiting ring of the elastic button 101d is fixedly arranged in the shell 101. The front end of the elastic button 101d is preferably made of rubber material and can be pressed and deformed. An elastic member is arranged behind the limiting ring of the elastic button 101d, and the elastic member is preferably a spring. The shaft connecting hole 101e is arranged on both sides of the shell 101.

[0035] Furthermore, the limiting plate 101a includes a card slot 101a-1 and a first connecting slot 101a-2, the card slot 101a-1 is arranged on the limiting plate 101a, one end of the base 102 is arranged in the card slot 101a-1, the first connecting slot 101a-2 is arranged on both sides of the card slot 101a-1, and is used for connecting the rod assembly 104 to rotate, the first groove 101b includes a first positioning hole 101b-1, a second positioning hole 101b-2 and a limiting slot 101b-3, the first positioning hole 101b -1 is arranged on the bottom side of one end of the first groove 101b, the limiting groove 101b-3 is arranged on the bottom side of the other end of the first groove 101b, the limiting groove 101b-3 is close to one end of the limiting plate 101a, the second positioning hole 101b-2 is arranged on both sides of the first positioning hole 101b-1, the second groove 101c includes a button positioning hole 101c-1, the button positioning hole 101c-1 is arranged on the bottom side of the second groove 101c, and the elastic button 101d is limited and arranged in the button positioning hole 101c-1.

[0036] Preferably, the base 102 includes a welding rod limiting groove 102a, a connecting boss 102b, a second connecting groove 102c, a positioning groove 102d and a limiting block 102e. The welding rod limiting groove 102a is arranged at one end of the base 102. The welding rod limiting groove 102a is preferably in a cross-shaped shape, which is convenient for the welding rod to be used at multiple angles. The limiting block 102e is arranged at the other end of the base 102. The connecting boss 102b is arranged between the welding rod limiting groove 102a and the limiting block 102e. The positioning groove 102d is arranged between the connecting boss 102b and the limiting block 102e. The second connecting groove 102c is arranged on both sides of the base 102. The second connecting groove 102c facilitates the rotation of the connecting rod assembly 104.

[0037] Furthermore, the welding rod limiting groove 102a includes a third positioning hole 102a-1, which is arranged in the middle of the M-shaped welding rod limiting groove 102a, the connecting boss 102b includes a boss connecting hole 102b-1, the boss connecting hole 102b-1 is arranged on the connecting boss 102b, and the boss connecting hole 102b-1 is movably connected to the fixed shaft 105, the second connecting groove 102c includes a connecting column 102c-1 and a third connecting hole 102c-2, the connecting column 102c-1 is arranged in the second connecting groove 102c, the third connecting hole 102c-2 is arranged in the second connecting groove 102c, and the third connecting hole 102c-2 is arranged on the side of the second connecting groove 102c close to the welding rod limiting groove 102a.

[0038] Preferably, the elastic extrusion member 103 includes a first elastic member 103a and an extrusion head 103b, the bottom end of the first elastic member 103a is fixedly arranged on the bottom side of the first positioning hole 101b-1, the other end of the first elastic member 103a is fixedly connected to the extrusion head 103b, and the extrusion head 103b includes an arc groove 103b-1, and the arc groove 103b-1 is arranged on both sides of the extrusion head 103b.

[0039] Preferably, the connecting rod assembly 104 includes a connecting rod 104a and an elastic connecting head 104b, the elastic connecting head 104b is hingedly connected to the connecting rod 104a, the elastic connecting head 104b is slidingly connected to the third connecting hole 102c-2, the diameter of the third connecting hole 102c-2 is larger than the diameter of the elastic connecting head 104b, and when the elastic connecting head 104b extends into the arc groove 103b-1, the connecting rod 104a does not block the button positioning hole 101c-1.

[0040] Furthermore, the connecting rod 104a includes a first connecting hole 104a-1, a second connecting hole 104a-2 and a baffle 104a-3. The first connecting hole 104a-1 is arranged at one end of the connecting rod 104a, the second connecting hole 104a-2 is arranged on one side of the first connecting hole 104a-1, and the baffle 104a-3 is arranged at the other end of the connecting rod 104a. The second connecting hole 104a-2 is movably connected to the connecting column 102c-1. When the baffle 104a-3 blocks the button positioning hole 101c-1, the elastic button 101d is pressed, and the elastic button 101d cannot contact the wireless remote control.

[0041] Furthermore, the elastic connector 104b includes a second elastic member 104b-1 and a connector 104b-2, one end of the second elastic member 104b-1 is fixedly disposed on the connector 104b-2, the other end of the second elastic member 104b-1 is disposed in the second positioning hole 101b-2, the connector 104b-2 includes a groove 104b-21, the groove 104b-21 is disposed on the connector 104b-2, a connecting shaft 104b-211 is disposed in the groove 104b-21, and the connecting shaft 104b-211 is movably connected to the first connecting hole 104a-1.

[0042] When in use, when the elastic extrusion member 103 is not pressed downward, the connection head 104b-2 contacts the extrusion head 103b, and the baffle 104a-3 just covers the button positioning hole 101c-1. When the elastic extrusion member 103 is pressed downward, the connection head 104b-2 contacts the arc groove 103b-1 on the extrusion head 103b. Since the second connection hole 104a-2 is movably connected to the connection column 102c-1, the connection shaft 104b-211 It is movably connected to the first connecting hole 104a-1, and the diameter of the third connecting hole 102c-2 is larger than that of the elastic connecting head 104b. Therefore, after the connecting head 104b-2 extends into the arc groove 103b-1, the baffle 104a-3 deflects with the connecting column 102c-1 as the center, and no longer blocks the button positioning hole 101c-1. At this time, the limiting unit releases the limiting state, and after pressing the elastic button 101d, the elastic button 101d contacts the wireless remote control.

[0043] Example 3

[0044] Reference Figure 1 to Figure 7 , which is the third embodiment of the utility model, and further provides a remote-controlled electric welding tongs. It includes a tongs body unit 200, the limiting unit 100 is arranged in the tongs body unit 200, the tongs body unit 200 includes a handle 201 and a remote control 202, the handle 201 is arranged in the first groove 101b, and the remote control 202 is arranged in the second accommodating space B.

[0045] Preferably, the handle member 201 includes a chuck 201a, a hand-holding portion 201b, a connecting groove 201c, a reset elastic member 201d and a handle connecting hole 201e. The chuck 201a is arranged at one end of the handle member 201, the hand-holding portion 201b is arranged at the other end of the handle member 201, the connecting groove 201c is arranged in the handle member 201, and one end of the reset elastic member 201d is fixedly arranged on the bottom side of the connecting groove 201c. When the chuck 201a and the welding rod limiting groove 102a clamp the welding rod, the top end of the reset elastic member 201d abuts against the bottom side of the positioning groove 102d, and the chuck 201a and the welding rod limiting groove 102a clamp the welding rod. The handle connecting hole 201e is movably connected to the fixed shaft 105.

[0046] Preferably, the remote control component 202 includes an elastic button block 202a, which is disposed on the remote control component 202. The elastic button block 202a is movably connected to the baffle 104a-3, and the elastic button block 202a is pressed to turn on and off the power.

[0047] When in use, the remote control component 202 is installed in the second accommodating space B, and the handle connecting hole 201e is movably connected to the fixed shaft 105. When the clamp 201a part and the welding rod limiting groove 102a clamp the welding rod, the top of the reset elastic component 201d is against the bottom side of the positioning groove 102d, and the clamp 201a and the welding rod limiting groove 102a clamp the welding rod. At the same time, when the clamp 201a part and the welding rod limiting groove 102a clamp the welding rod, when the elastic extrusion component 103 is squeezed downward, the connecting head 104b-2 contacts the arc groove 103b-1 on the extrusion head 103b. Since the second connecting hole 104a-2 is movably connected to the connecting column 102c-1, the connecting shaft 104b-211 is movably connected to the first connecting hole 104a-1, and the third connecting hole 102c -2 diameter is greater than the diameter of the elastic connector 104b, so after the connector 104b-2 extends into the arc groove 103b-1, the baffle 104a-3 deflects with the connecting column 102c-1 as the center, and no longer blocks the button positioning hole 101c-1. At this time, the limit unit releases the limit state. After pressing the elastic button 101d, the elastic button 101d contacts the elastic button block 202a, so that the remote-controlled electric welding clamp can turn on and off the power of the welding machine far away from the operation site, thereby avoiding the welding machine being generally far away from the operating point, which makes it more troublesome to turn on and off the welding machine. A 380V maximum current 64A maximum power 14.4KW automatic closing and automatic opening switch is set on the welding machine. The remote control component 202 is a remote control with a maximum radio frequency wireless distance of 500m.

[0048] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and ratio of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangements, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present utility model. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also an equivalent structure. Without departing from the scope of the present invention, other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the present invention is not limited to a specific embodiment, but extends to various modifications that still fall within the scope of the appended claims.

[0049] Additionally, in order to provide a concise description of example embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0050] It should be understood that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but for those of ordinary skill having the benefit of this disclosure, without undue experimentation, the development effort will be a routine task of design, fabrication, and production.

[0051] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A limiting structure, Features: include, A limiting unit (100), the limiting unit (100) comprising a shell (101), a base (102), an elastic extrusion piece (103), a connecting rod assembly (104) and a fixed shaft (105), the base (102) being movably connected to the shell (101) via the fixed shaft (105), one end of the elastic extrusion piece (103) being fixedly arranged on the shell (101), and the connecting rod assembly (104) being movably connected to the elastic extrusion piece (103).

2. The limiting structure according to claim 1, Features: The shell (101) comprises a limiting plate (101a), a first groove (101b), a second groove (101c), an elastic button (101d) and an axis connecting hole (101e); the limiting plate (101a) divides the shell (101) into a first accommodating space (A) and a second accommodating space (B); the first groove (101b) is arranged in the first accommodating space (A); the second groove (101c) is arranged in the second accommodating space (B); the elastic button (101d) is arranged on the bottom side of the shell (101); and the axis connecting hole (101e) is arranged on both sides of the shell (101).

3. The limiting structure according to claim 2, Features: The limiting plate (101a) comprises a card slot (101a-1) and a first connecting slot (101a-2), wherein the card slot (101a-1) is arranged on the limiting plate (101a), and the first connecting slot (101a-2) is arranged on both sides of the card slot (101a-1). The first groove (101b) comprises a first positioning hole (101b-1), a second positioning hole (101b-2) and a limiting groove (101b-3), wherein the first positioning hole (101b-1) is arranged at the bottom side of one end of the first groove (101b), the limiting groove (101b-3) is arranged at the bottom side of the other end of the first groove (101b), and the second positioning hole (101b-2) is arranged at both sides of the first positioning hole (101b-1). The second groove (101c) comprises a button positioning hole (101c-1), and the button positioning hole (101c-1) is arranged on the bottom side of the second groove (101c).

4. The limiting structure according to claim 1 or 3, Features: The base (102) comprises a welding rod limiting groove (102a), a connecting boss (102b), a second connecting groove (102c), a positioning groove (102d) and a limiting block (102e); the welding rod limiting groove (102a) is arranged at one end of the base (102); the limiting block (102e) is arranged at the other end of the base (102); the connecting boss (102b) is arranged between the welding rod limiting groove (102a) and the limiting block (102e); the positioning groove (102d) is arranged between the connecting boss (102b) and the limiting block (102e); and the second connecting groove (102c) is arranged on both sides of the base (102).

5. The limiting structure according to claim 4, Features: The welding rod limiting groove (102a) comprises a third positioning hole (102a-1), wherein the third positioning hole (102a-1) is arranged in the middle of the welding rod limiting groove (102a). The connecting boss (102b) comprises a boss connecting hole (102b-1), the boss connecting hole (102b-1) is arranged on the connecting boss (102b), and the boss connecting hole (102b-1) is movably connected to the fixed shaft (105). The second connecting groove (102c) comprises a connecting column (102c-1) and a third connecting hole (102c-2); the connecting column (102c-1) is arranged in the second connecting groove (102c); the third connecting hole (102c-2) is arranged in the second connecting groove (102c); and the third connecting hole (102c-2) is arranged on a side of the second connecting groove (102c) close to the welding rod limiting groove (102a).

6. The limiting structure according to claim 1 or 5, Features: The elastic extrusion member (103) comprises a first elastic member (103a) and an extrusion head (103b); one end of the first elastic member (103a) is fixedly arranged in a first positioning hole (101b-1); the other end of the first elastic member (103a) is fixedly connected to the extrusion head (103b); the extrusion head (103b) comprises an arc groove (103b-1); and the arc groove (103b-1) is arranged on both sides of the extrusion head (103b).

7. The limiting structure according to claim 6, Features: The connecting rod assembly (104) comprises a connecting rod (104a) and an elastic connecting head (104b), wherein the elastic connecting head (104b) is hingedly connected to the connecting rod (104a).

8. The limiting structure according to claim 7, Features: The connecting rod (104a) comprises a first connecting hole (104a-1), a second connecting hole (104a-2) and a baffle (104a-3), wherein the first connecting hole (104a-1) is arranged at one end of the connecting rod (104a), the second connecting hole (104a-2) is arranged at one side of the first connecting hole (104a-1), the baffle (104a-3) is arranged at the other end of the connecting rod (104a), and the second connecting hole (104a-2) is movably connected to the connecting column (102c-1). The elastic connector (104b) comprises a second elastic member (104b-1) and a connector (104b-2), one end of the second elastic member (104b-1) is fixedly arranged on the connector (104b-2), the other end of the second elastic member (104b-1) is arranged in the second positioning hole (101b-2), the connector (104b-2) comprises a groove (104b-21), the groove (104b-21) is arranged on the connector (104b-2), a connecting shaft (104b-211) is arranged in the groove (104b-21), and the connecting shaft (104b-211) is movably connected to the first connecting hole (104a-1).

9. A remote-controlled welding tongs, Features: comprising the limiting structure according to any one of claims 1 to 8; and A clamp body unit (200), wherein the limiting unit (100) is arranged in the clamp body unit (200), and the clamp body unit (200) comprises a handle member (201) and a remote control member (202), wherein the handle member (201) is arranged in a first groove (101b), and the remote control member (202) is arranged in a second accommodating space (B).

10. The remote-controlled welding tongs according to claim 9, Features: The handle member (201) comprises a clamp (201a), a hand-held portion (201b), a connecting groove (201c), a reset elastic member (201d) and a handle connecting hole (201e); the clamp (201a) is arranged at one end of the handle member (201); the hand-held portion (201b) is arranged at the other end of the handle member (201); the connecting groove (201c) is arranged in the handle member (201); one end of the reset elastic member (201d) is fixedly arranged at the bottom side of the connecting groove (201c); and the handle connecting hole (201e) is movably connected to the fixed shaft (105). The remote control component (202) comprises an elastic button block (202a), the elastic button block (202a) is arranged on the remote control component (202), and the elastic button block (202a) is movably connected to the baffle (104a-3).

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