Novel welding device with detachable arms

Abstract

A novel welding device with detachable arms comprises a clamp, an upper handle, a side handle, a fixed arm, a movable arm, a fixed electrode, a movable electrode, a control button, a vertical rod, an air cylinder locking assembly and a locking connecting assembly, an air cylinder is arranged in the clamp, and the bottom end of the front side of the clamp is connected with the movable arm through the air cylinder locking assembly; the top end of the front side of the clamp is connected with the fixed arm and the movable arm through the locking connecting assembly, the fixed arm is connected with the movable arm through a shaft, the upper handle is connected with the top of the rear side of the clamp, the side handle is connected with the side face of the clamp, the fixed arm is connected with the fixed electrode, and the movable arm is connected with the movable electrode. The control button is connected with the air cylinder locking assembly, a button is arranged at the top end of the vertical rod, one end of the vertical rod is arranged on the fixed arm, and the other end of the vertical rod is connected with the movable arm. Compared with the prior art, the electrode clamping device is provided with a mechanism for converting linear motion of the clamping electrode into rotary motion of the moving arm.

Description

Technical Field

[0001] The utility model relates to the field of automobile sheet metal repair, and particularly relates to a welding device with a novel detachable arm. Background Art

[0002] These devices in the field of resistance welding machines have a method of generating a very strong current, which is transmitted through two electrodes that clamp the materials to be welded together. Since the resistance of the material is greater than that of the electrodes, the current heats the material and performs the welding. The part that supports the electrodes is called a fixture. The advantage of these devices is that there are several sets of fixtures to adapt to the thickness of the materials, as well as the space for placing the electrodes during the welding process.

[0003] As is well known, a spot welding device has a welding arm that has a fixture with an inverted "C" - shaped arm, and at the end is the first electrode inside the arm and another movable electrode. The current device has two jacks to control the forward and backward movement of the block electrode to close and open the fixture. As is well known, the rotational movement of the electrodes is used, like scissors. The mechanical system includes a pneumatic actuator that imprints a linear movement on the clamping electrodes, electrical contacts designed to transmit a very strong current (for example, from 1000 A to 15000 A), an automatic hydraulic connection for the water - cooling system, a mechanical device for converting the linear movement into a rotational movement, and a mechanical device for blocking and unlocking the movement of the movable electrode by simply pressing a button.

[0004] Existing devices have complex and time - consuming locking methods. They require the use of specific tools for assembly and disassembly, and even the participation of two people. The current devices are usually equipped with two electrode switch jacks, which increases the number of devices, the risk of failure, and the manufacturing cost.

[0005] To solve the above problems, a series of improvements have been made. Content of the Utility Model

[0006] The purpose of the utility model is to provide a welding device with a novel detachable arm to overcome the above - mentioned drawbacks and deficiencies of the prior art.

[0007] A welding device with a novel detachable arm, comprising: a fixture, an upper handle, a side handle, a fixed arm, a movable arm, a fixed electrode, a movable electrode, control buttons, a vertical rod, a cylinder locking assembly and a locking connection assembly. A cylinder is provided inside the fixture. The bottom end of the front side of the fixture is connected to the movable arm through the cylinder locking assembly. The top end of the front side of the fixture is connected to the fixed arm and the movable arm through the locking connection assembly. The fixed arm and the movable arm are connected by a shaft. The upper handle is connected to the top of the rear side of the fixture. The side handle is connected to the side of the fixture. The fixed arm is connected to the fixed electrode. The movable arm is connected to the movable electrode. The control buttons are arranged on the upper handle and are connected to the cylinder locking assembly. A button is provided at the top of the vertical rod. One end of the vertical rod is arranged on the fixed arm, and the other end of the vertical rod is connected to the movable arm.

[0008] Further, the cylinder locking assembly includes: a rod head, a circular part, an annular throat, a circular window, a latch, a spring and a square block. The rod head is connected to the cylinder rod of the fixture. The rod head is connected to the circular part. The circular part is connected to the latch through the annular throat. A circular window is provided on the latch, and the circular window is connected to the rod head during use. A spring is provided at the bottom of the latch. The square block is arranged above the latch and is connected to the bottom end of the vertical rod.

[0009] Further, the movable arm includes: a movable arm body, a copper sheet, a flexible connector, a plastic cylinder and a connecting ring. The flexible connector is connected to the copper sheet. A circular window is provided inside the copper sheet. The plastic cylinder is connected to the circular window. A connecting ring is provided on the plastic cylinder, and the connecting ring is connected to the movable arm body.

[0010] Further, the locking connection assembly includes: a locking rod, a lip, a cylindrical hole, a square shaft, a locking spring, a base and a guiding pin. The locking rod is connected to the cam of the fixture. The locking rod is connected to the lip. The lip is connected to the fixed arm. The cylindrical hole is arranged among the fixed arm, the movable arm and the fixture, and the cylindrical hole is connected to the coolant hose. The square shaft is connected to the guiding pin. The locking spring is connected to the cam. A cam is provided inside the base, and guiding pins are provided at the side end of the base.

[0011] Advantages of the present utility model:

[0012] Compared with the traditional technology, the present utility model has a mechanism that converts the linear motion of the clamping electrode into the rotational motion of the moving arm. In addition, the present utility model allows the moving electrode to be automatically locked onto the clamping electrode, so that the two components are united, and thus a specific displacement of the clamping electrode results in a specific angular rotation of the moving electrode. Description of the Drawings

[0013] Figure 1This is the structural schematic diagram of the utility model.

[0014] Figure 2 This is the structural schematic diagram of the cylinder locking assembly.

[0015] Figure 3 This is the structural schematic diagram of the rod of the sliding cylinder inserted into the circular window.

[0016] Figure 4 This is the structural schematic diagram of the position where the latch locks the movable arm with the rod of the cylinder.

[0017] Figure 5 This is the structural schematic diagram of the movable arm.

[0018] Figure 6 This is the schematic diagram of the position before the movable arm is inserted into the fixture.

[0019] Figure 7 This is the schematic diagram of the connection relationship between the electrode movable arm of the fixture and the movable arm.

[0020] Figure 8 This is the structural schematic diagram of the cylindrical hole.

[0021] Figure 9 This is the structural schematic diagram of the locking connection assembly.

[0022] Figure 10 This is the structural schematic diagram of another perspective of the locking connection assembly.

[0023] Figure 11 This is the schematic diagram of the position when the movable arm and the fixed arm contact the fixture.

[0024] Figure 12 This is the schematic diagram of the position of the movable arm and the fixed arm after rotation.

[0025] Figure 13 This is the schematic diagram of the position of the movable arm and the fixed arm when the locking rod is lowered.

[0026] Figure 14 This is the schematic diagram of the connection relationship of the vertical rod.

[0027] Reference numerals:

[0028] Fixture 100, cylinder 110 and cam 120.

[0029] Upper handle 200, side handle 300, fixed arm 400, movable arm 500, movable arm body 510, copper sheet 520, flexible connector 530, plastic cylinder 540 and connecting ring 550.

[0030] Fixed electrode 600, movable electrode 700, control button 800 and vertical rod 900.

[0031] Cylinder locking assembly 1000, club head 1100, circular part 1200, annular throat 1300, circular window 1400, latch 1500, spring 1600, and block 1700.

[0032] Locking connection assembly 2000, locking rod 2100, lip 2200, cylindrical hole 2300, square shaft 2400, locking spring 2500, base 2600, and guide pin 2700. Detailed implementation mode

[0033] The present utility model will be further described below in conjunction with specific embodiments. It should be understood that the following embodiments are only used to illustrate the present utility model and not to limit the scope of the present utility model.

[0034] Embodiment 1

[0035] Figure 1 It is a structural schematic diagram of the present utility model. Figure 2 It is a structural schematic diagram of the cylinder locking assembly. Figure 3 It is a structural schematic diagram of the rod of the sliding cylinder inserted into the circular window. Figure 4 It is a structural schematic diagram of the position where the latch locks the movable arm with the rod of the cylinder. Figure 5 It is a structural schematic diagram of the movable arm. Figure 6 It is a schematic diagram of the position before the movable arm is inserted into the fixture. Figure 7 It is a schematic diagram of the connection relationship between the electrode movable arm of the fixture and the movable arm. Figure 8 It is a structural schematic diagram of the cylindrical hole. Figure 9 It is a structural schematic diagram of the locking connection assembly. Figure 10 It is a structural schematic diagram of another perspective of the locking connection assembly. Figure 11 It is a schematic diagram of the position when the movable arm and the fixed arm contact the fixture. Figure 12 It is a schematic diagram of the position of the movable arm and the fixed arm after rotation. Figure 13 It is a schematic diagram of the position of the movable arm and the fixed arm when the locking rod is lowered. Figure 14 It is a schematic diagram of the connection relationship of the vertical rod.

[0036] As Figures 1 - 14As shown in the figure, a welding device with a new type of detachable arm includes: a fixture 100, an upper handle 200, a side handle 300, a fixed arm 400, a movable arm 500, a fixed electrode 600, a movable electrode 700, control buttons 800, a vertical rod 900, a cylinder locking assembly 1000 and a locking connection assembly 2000. A cylinder 110 is provided inside the fixture 100. The bottom end of the front side of the fixture 100 is connected to the movable arm 500 through the cylinder locking assembly 1000. The top end of the front side of the fixture 100 is connected to the fixed arm 400 and the movable arm 500 through the locking connection assembly 2000. The fixed arm 400 and the movable arm 500 are connected by a shaft. The upper handle 200 is connected to the top of the rear side of the fixture 100. The side handle 300 is connected to the side of the fixture 100. The fixed arm 400 is connected to the fixed electrode 600. The movable arm 500 is connected to the movable electrode 700. The control buttons 800 are provided on the upper handle 200. The control buttons 800 are connected to the cylinder locking assembly 1000. A button is provided at the top end of the vertical rod 900. One end of the vertical rod 900 is provided on the fixed arm 400, and the other end of the vertical rod 900 is connected to the movable arm 500.

[0037] The cylinder locking assembly 1000 includes: a rod head 1100, a circular part 1200, an annular throat 1300, a circular window 1400, a latch 1500, a spring 1600 and a square 1700. The rod head 1100 is connected to the cylinder rod of the fixture 100. The rod head 1100 is connected to the circular part 1200. The circular part 1200 is connected to the latch 1500 through the annular throat 1300. A circular window 1400 is provided on the latch 1500. The circular window 1400 is connected to the rod head 1100 during use. A spring 1600 is provided at the bottom of the latch 1500. The square 1700 is provided above the latch 1500. The square 1700 is connected to the bottom end of the vertical rod 900.

[0038] The movable arm 500 includes: a movable arm body 510, a copper sheet 520, a flexible connector 530, a plastic cylinder 540 and a connecting ring 550. The flexible connector 530 is connected to the copper sheet 520. A circular window 1400 is provided inside the copper sheet 520. The plastic cylinder 540 is connected to the circular window 1400. A connecting ring 550 is provided on the plastic cylinder 540. The connecting ring 550 is connected to the movable arm body 510.

[0039] The locking connection assembly 2000 includes: a locking lever 2100, a lip 2200, a cylindrical hole 2300, a square shaft 2400, a locking spring 2500, a base 2600, and a guide pin 2700. The locking lever 2100 is connected to the cam 120 of the fixture 100. The locking lever 2100 is connected to the lip 2200. The lip 2200 is connected to the fixed arm 400. The cylindrical hole 2300 is provided between the fixed arm 400, the movable arm 500, and the fixture 100. The cylindrical hole 2300 is connected to the coolant hose. The square shaft 2400 is connected to the guide pin 2700. The locking spring 2500 is connected to the cam 120. The cam 120 is provided inside the base 2600. The guide pin 2700 is provided at the side end of the base 2600.

[0040] As Figure 1 shown, the fixture 100 has clamping and manipulation functions and is used to connect the detachable upper handle 200 and the side handle 300. The fixture 100 extends forward from the fixed arm 400, preferably above the movable arm 500. The end of the fixed arm 400 is the fixed electrode 600, and the end of the movable arm 500 is the movable electrode 700. The fixed arm 400, the movable arm 500, and the fixture 100 assembly can be held by the operator or connected to the end of a robotic arm. The control button 800 is placed near the upper handle 200 to allow the operator to open and close the fixture.

[0041] The opened fixture 100 shows the internal components. The fixed electrode 600 and the movable electrode 700 are open so that the metal components to be welded can be inserted between them. The rotation of the movable arm 500 around the axis allows the electrodes to open at a distance depending on the rotation angle. The two arms are connected to the fixture 100 through a locking mechanism, which will be described later. Once the two arms are fixed to the fixture 100, the operator presses the control button 800 to move the cylinder rod forward and allows it to be fixed to the movable arm 500.

[0042] As Figure 2 shown, an illustration of the rod of the cylinder at the beginning of its connection to the movable arm 500 is shown. The rod head 1100 has a chamfer and then a circular part 1200, which extends in the direction opposite to the electrode through the annular throat 1300 on the right side. The head of the rod head 1100 is inserted into the circular window 1400 in the vertical latch 1500 and enters the end of the movable electrode 700 in the form of a conical surface. The angles of the cone and the chamfer complement each other to achieve good electrical contact. The vertical dimension of the window is more important than its horizontal dimension, and its sides are also chamfered. The latch 1500 moves vertically in the groove connected to the movable arm 500. The spring 1600 at the bottom exerts pressure on the latch 1500 to move it upward.

[0043] At the start of inserting the club head 1100 into the circular window 1400, the chamfers on the circular window 1400 and the club head 1100 come into contact and exert a downward pressure on the latch 1500, which descends by exposing the lower surface of the actuator rod. Then, the spring 1600 is compressed.

[0044] According to the present utility model, the movement of the movable electrode 700 is affected by the forward and backward movement of a single cylinder 110, and the alternating pressurization is controlled by the control button 800. The cylinder chamber is designed to be under overpressure to bring the electrodes closer and away from each other in a vacuum. The pressure of the pneumatic fluid of the cylinder 110 driving the fixture 100 is controlled by two electric valves. In the open position, a Venturi effect is generated in the pipeline and a pressure lower than the atmosphere is produced, and this pressure is transmitted to the fixture block through the cemented carbide. When the cylinder chamber is under overpressure, the electrodes come into contact. Thus, only one cylinder 110 is needed to push or retract the rod, thereby opening and closing the electrodes.

[0045] As Figure 3 shown, shortly after the state described in the figure, the rod of the sliding cylinder in the circular window 1400. The cylinder rod continues to move forward, and the latch 1500 is now at the height of the circular part 1200. At this time, the spring 1600 is in its maximum compressed position.

[0046] As Figure 4 shown, the latch 1500 is in its position where it locks the movable arm 500 with the cylinder rod. The spring 1600 pressure pushes the latch 1500 upward, so its surface contacts the right side of the annular throat 1300. Since the thickness of the latch 1500 is advantageously almost the same as the width of the annular throat 1300, the former is firmly locked with the second latch. Any movement of the cylinder rod will cause the latch 1500 to move in the same direction, thereby causing the movable arm 500 to move in the same direction. Therefore, when the actuator rod moves forward, it triggers the movable arm 500 to rotate around the axis, thereby bringing the electrodes closer. The distance between the electrodes increases proportionally with the backward displacement of the cylinder rod.

[0047] The spring 1600 compressed in this position maintains the lock between the club head 1100 and the movable arm 500. To unlock, simply lower the latch 1500 and push the cylinder rod backward. This movement is accomplished by a vertical rod 900, the end of which is a square 1700 that exerts pressure on the latch 1500, thereby releasing the locking mechanism. The vertical rod 900 passes through the entire height of the two arms and appears on the top surface through the Figure 1 button visible in. During disassembly, the operator presses this button, allowing reverse control of the actuator rod.

[0048] The advantages of the above-mentioned arm and clamp assembly are that blocks formed by two arms are used on many types of machines. The two arm blocks are connected to the clamp 100 by a single locking mechanism located above the side handle 300. In this way, the same clamp 100 with a "C"-shaped electrode block can be used, with the ends of the branches at both ends facing each other. The length of the middle branch that defines the distance between the electrodes corresponds to the length of the rod of the cylinder. In such a machine, there are no rotating parts, and the distance between the two ends of the electrode directly depends on the distance traveled by the rod of the cylinder. The present utility model allows the "C"-shaped arm or the rotating arm to be used indiscriminately on the same clamp 100.

[0049] As Figure 5 shown, the sliding sub-assembly of the arm tightens the extension of the clamp 100. This sub-assembly is made of a first piece of copper sheet 520, which has the function of locking as the latch 1500 moves vertically. During the clamping process, the extension of the clamp 100 and this copper sheet 520 component contact the conical component, ensuring good current flow during the welding process. Then, the current passes through the flexible connection 530, which is made of an open disc (three-quarters of a circle in the case of Figure 5 ). The flexible connection 530 is a multi-layer electronic shunt. When the circumference is opened, it is easily deformed to follow the straight-line motion of the cylinder rod and convert it into the rotational motion of the movable arm 500. The copper sheet 520 is connected to the movable claw and the nut of the movable arm 500.

[0050] As Figure 5 shown, the sub-assembly is electrically insulated from the rest of the arm. The guiding part of the linear displacement is provided by a plastic cylinder 540 that provides electrical insulation. The assembly also has two connecting rings 550, placed at exactly opposite positions on the surface of the plastic cylinder 540. The connecting rings 550 are installed in rectangular holes located on both sides of the movable arm 500, ensuring the angle of the sliding assembly.

[0051] As Figure 6 shown, the electrodes of the clamp 100 cooperate with the arm in such a way that good electrical contact is achieved.

[0052] According to a preferred example, as Figure 7 shown, the position of the arm block before being inserted into the clamp 100. The arm bracket is equipped with a locking rod 2100. Figure 7 The rod head 1100 of the cylinder is also shown. The connecting mechanism has a lip 2200 that extends to the bottom and rear of the arm block.

[0053] First, the slider is lowered, and the lip 2200 is located at the entrance of the throat that extends horizontally along the axis of the clamp 100.

[0054] As Figure 8As shown, a convex portion and a concave portion of the end connection cam 120 of the double-arm block to the fixture 100 are formed, both made of brass. The two cylindrical holes 2300 correspond to the connection holes for connecting the hoses for conveying coolant.

[0055] As Figure 9 shown, an element for locking the arm. The movement of the locking lever 2100 causes the rotation of two cams connected by an intermediate member. The latch 1500 contacts the eccentric profile in the cam 120.

[0056] Before locking, the locking spring 2500 pushes out the ring, and then closes the valve that controls the flow of coolant (usually water). Then the waterway is closed, and the annular seals inside and outside the ring ensure waterproofing.

[0057] In the locking stage, the cam 120 is rotated by the lever and pushes the latch 1500 forward. The two cams move backward, compressing the locking spring 2500 that exerts a great force. The clamping pressure is ensured by the contact slider outside the cam.

[0058] As Figure 10 shown, another view of the mechanism in the unlocked position is shown in the figure. When unlocking, the guide pin 2700 is guided during the setting of the base and forced to drop to the low position. At the end of the locking stage, the pin is fully lowered. Then, the base connector pushes the ring, compressing the locking spring 2500 and opening the valve. Then the coolant flow is opened.

[0059] As Figure 11 shown, the position when the arm block contacts the fixture 100. The operator now makes a rotational movement to lower the front part of the electrode, thus horizontally positioning the arm block.

[0060] As Figure 12 shown, the position when the double-arm slider is in the horizontal position is shown. Then the operator moves directly back to insert the convex element at the end into the concave element. Figure 12 Indicates the position after this linear movement.

[0061] As Figure 13 shown, the position of the double-arm slider where the locking lever 2100 is in the lowered state, thus ensuring a good connection between the slider and the fixture 100. The constant force exerted by lowering the locking lever 2100 on the mechanism is such that the mechanism is strong enough not to deform under the cylinder pressure.

[0062] As Figure 14 shown, an arm and fixture 100 assembly with a cylinder rod connected to the movable arm 500. As described above, in Figure 3 , Figure 4 and Figure 5 solidification is carried out in the front. Figure 14The vertical rod shown ends at block 1700, which exerts pressure on latch 1500 to release the movable arm 500. A button above the vertical rod is visible in the figure. As the cylinder is pushed backward, the spacing between the electrodes reaches its maximum.

[0063] The double - arm slider is disconnected by reverse movement. As a first step, the operator presses control button 800 to release the head of the cylinder rod. The pressure on control button 800 at the bottom of clamp 100 retracts the electrodes and the extractor of the arm. Then the operator tilts the locking rod 2100 backward to release the pressure on the locking mechanism. Then the double - arm slider can be removed, first by a backward horizontal linear movement and then by rotating the front of the slider upward.

[0064] This connection method can ensure both electrical connection and hydraulic connection at the same time. The pipe allows the supply and return of the heat - conducting fluid inside the metal block of the electrode.

[0065] Compared with the traditional technology, the utility model has a mechanism that converts the linear movement of the clamping electrode into the rotational movement of the moving arm. In addition, the utility model allows the moving electrode to be automatically locked onto the clamping electrode, so that the two components are united, so that a specific displacement of the clamping electrode results in a specific angular rotation of the moving electrode.

[0066] The specific implementation manners of the utility model have been described above, but the utility model is not limited thereto. As long as it does not deviate from the purpose of the utility model, the utility model can have various changes.

Claims

1. A novel welding device with detachable arms, characterized in that: include: A clamp (100), an upper handle (200), a side handle (300), a fixed arm (400), a movable arm (500), a fixed electrode (600), a movable electrode (700), a control button (800), a vertical rod (900), a cylinder locking assembly (1000) and a locking connection assembly (2000), wherein a cylinder (110) is arranged inside the clamp (100), the front bottom end of the clamp (100) is connected to the movable arm (500) through the cylinder locking assembly (1000), the front top end of the clamp (100) is connected to the fixed arm (400) and the movable arm (500) through the locking connection assembly (2000), and the fixed arm (400) The upper handle (200) is connected to the top of the rear side of the clamp (100), the side handle (300) is connected to the side of the clamp (100), the fixed arm (400) is connected to the fixed electrode (600), the movable arm (500) is connected to the movable electrode (700), the control button (800) is arranged on the upper handle (200), the control button (800) is connected to the cylinder locking assembly (1000), a button is arranged on the top of the vertical rod (900), one end of the vertical rod (900) is arranged on the fixed arm (400), and the other end of the vertical rod (900) is connected to the movable arm (500).

2. A novel welding device with detachable arms according to claim 1, characterized in that: The cylinder locking assembly (1000) comprises: a rod head (1100), a circular portion (1200), an annular throat (1300), a circular window (1400), a latch (1500), a spring (1600) and a block (1700), wherein the rod head (1100) is connected to the cylinder rod of the clamp (100), the rod head (1100) is connected to the circular portion (1200), and the circular portion (1200) is connected to the cylinder rod of the clamp (100). ) is connected to the latch (1500) through an annular throat (1300), the latch (1500) is provided with a circular window (1400), the circular window (1400) is connected to the rod head (1100) when in use, a spring (1600) is provided at the bottom of the latch (1500), the block (1700) is provided above the latch (1500), and the block (1700) is connected to the bottom end of the vertical rod (900).

3. A novel welding device with detachable arms according to claim 2, characterized in that: The movable arm (500) comprises: a movable arm body (510), a copper sheet (520), a flexible connector (530), a plastic cylinder (540) and a connecting ring (550); the flexible connector (530) is connected to the copper sheet (520); a circular window (1400) is provided in the copper sheet (520); the plastic cylinder (540) is connected to the circular window (1400); a connecting ring (550) is provided on the plastic cylinder (540); and the connecting ring (550) is connected to the movable arm body (510).

4. A novel welding device with detachable arms according to claim 1, characterized in that: The locking connection assembly (2000) comprises: a locking rod (2100), a lip (2200), a cylindrical hole (2300), a square shaft (2400), a locking spring (2500), a base (2600) and a guide pin (2700), wherein the locking rod (2100) is connected to a cam (120) of a clamp (100), the locking rod (2100) is connected to the lip (2200), and the lip (2200) is connected to a fixed arm (400). ), the cylindrical hole (2300) is arranged between the fixed arm (400), the movable arm (500) and the clamp (100), the cylindrical hole (2300) is connected to the coolant hose, the square shaft (2400) is connected to the guide pin (2700), the locking spring (2500) is connected to the cam (120), the cam (120) is arranged in the base (2600), and the guide pin (2700) is arranged at the side end of the base (2600).

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