Stud welding gun

Abstract

The utility model discloses a stud welding gun, and belongs to the technical field of welding and cutting equipment. Comprising a gun body and an adjusting assembly arranged at the front end of the gun body, the adjusting assembly comprises an outer sleeve and an inner sleeve, and a limiting assembly is arranged in the outer sleeve; the limiting assembly comprises a rotating shaft, the rotating shaft is fixedly sleeved with a straight gear, a straight rack is arranged on the outer sleeve in a penetrating mode, and the straight rack is meshed with the straight gear; a shell is connected to the outer wall of the outer sleeve, a driving assembly is arranged in the shell, the part, penetrating through the outer sleeve, of the rotating shaft is connected to the driving assembly, the driving assembly comprises a driving shaft, the two ends of the driving shaft are rotationally arranged on the inner wall of the shell, the driving shaft is fixedly sleeved with a first bevel gear, and a second bevel gear is arranged at the end, close to the driving shaft, of the rotating shaft. And the bevel gear I is meshed with the bevel gear II. According to the stud welding gun, the adjusting assembly is suitable for studs of different lengths, the limiting assembly is used for clamping the studs of different diameters, the effect that the stud welding gun is suitable for the studs of various specifications is achieved, and operation is convenient and fast.

Description

Technical Field

[0001] The utility model relates to the technical field of welding and cutting equipment, in particular to a stud welding gun. Background Technique

[0002] Stud welding is a method of welding one end of a stud in contact with the surface of a plate part. After energizing and generating an arc, when the contact surface melts, a certain pressure is applied to the stud to complete the welding. It is commonly used for the welding of stud welding nails and special-shaped nails. A stud welding gun is a mechanism for performing the welding process. The principle of the stud welding gun is to use the arc heat generated by the rapid discharge of a capacitor to quickly melt and burn the small tip of the stud. At the same time, the welded metal workpiece also undergoes local melting, and the stud is pressed into the molten pool of the workpiece, and then the arc is extinguished to complete the welding. The actual operation method is as follows: First, clamp the stud well, with the gun head facing downwards, so that all three support rods are in contact with the workpiece. Then, press the stud welding gun forcefully. After the stud is vertically in contact with the workpiece, start the gun switch device, so that the energy stored in the capacitor is instantaneously released through the end protrusion. After the protrusion melts and vaporizes to generate an arc, under the action of the spring pressure in the stud welding gun, the stud moves downward. The arc heat forms a thin molten layer on the flange end of the stud and the surface of the workpiece. The stud continues to move downward, the stud is inserted into the molten pool, the arc goes out, and under pressure, the flange end of the stud and the workpiece form a joint, and the welding is completed. Therefore, the working characteristics of the stud welding gun are that there is pressure, short time, and high frequency.

[0003] In the prior art, when clamping a stud with a stud welding gun, it is necessary to first put the stud into the chuck for assembly, then insert the chuck with the assembled stud into the gun body from the front end of the gun body, and then use the clamping mechanism to clamp the stud. However, the above process of clamping the stud is relatively complex. In addition, the range of stud specifications that can be clamped by traditional stud welding guns is small, and it is difficult to be suitable for clamping and fixing studs of various specifications. If it is necessary to clamp and fix studs of various specifications, it is usually necessary to reserve multiple chucks of different specifications in advance, which brings trouble to the use to a certain extent. Summary of the Invention

[0004] The utility model aims to solve the problems pointed out in the background technique and proposes a stud welding gun. The adjusting component is suitable for studs of different lengths, and the limiting component is used to clamp studs of different diameters, so that the stud welding gun can be suitable for studs of various specifications.

[0005] In order to achieve the above purpose, the technical solution of the utility model is as follows:

[0006] A stud welding gun includes a gun body and an adjusting component arranged at the front end of the gun body. The adjusting component includes an outer sleeve and an inner sleeve. The outer sleeve is sleeved outside the inner sleeve, and a limiting component is arranged inside the outer sleeve;

[0007] The limiting component includes a rotating shaft, on which a spur gear is fixedly sleeved. A spur rack is penetratingly arranged on the outer sleeve, and the spur rack meshes with the spur gear.

[0008] A housing is connected to the outer wall of the outer sleeve. A driving component is arranged in the housing. The part of the rotating shaft passing through the outer sleeve is connected to the driving component. The driving component includes a driving shaft, and both ends of the driving shaft are rotatably arranged on the inner wall of the housing. The driving shaft is perpendicular to the rotating shaft. A first bevel gear is fixedly sleeved on the driving shaft, and a second bevel gear is arranged at the end of the rotating shaft close to the driving shaft. The first bevel gear and the second bevel gear mesh with each other.

[0009] Preferably, there are two rotating shafts, and the two rotating shafts are symmetrically distributed up and down in the outer sleeve.

[0010] Preferably, a limiting plate is arranged on the part of the spur rack located in the housing, and a boss is arranged on the part of the spur rack passing through the outer sleeve and located in the housing.

[0011] Preferably, the driving component further includes a worm gear fixedly sleeved on the driving shaft. A worm is arranged in the housing. One end of the worm passing through the housing is provided with a knob, and the other end of the worm is rotatably arranged on the inner wall of the housing.

[0012] Preferably, one end of the inner sleeve is connected to the gun body. A bolt is arranged between the outer sleeve and the inner sleeve. The bolt is threadedly connected to the outer sleeve through a threaded hole. Positioning holes are formed on the inner sleeve. The positioning holes match the bolts. There are two groups of positioning holes symmetrically distributed up and down, and each group of positioning holes has a plurality of them. There are two bolts.

[0013] Preferably, a positioning rod is arranged on the side of the outer sleeve away from the inner sleeve. There are three positioning rods, and the three positioning rods are distributed in a circumferential array. One end of the positioning rod is connected to the outer sleeve, and a support block is arranged at the other end of the positioning rod.

[0014] Preferably, a protection component is further arranged on the side of the outer sleeve away from the inner sleeve. The protection component includes a sliding ring and a slag discharge cylinder. The slag discharge cylinder is located on the side of the sliding ring away from the outer sleeve. Three round holes are formed on the sliding ring, and the three round holes are distributed in a circumferential array. The three positioning rods respectively penetrate through the corresponding round holes. Springs are respectively sleeved on each positioning rod, and both ends of each spring are respectively connected to the sliding ring and the outer sleeve.

[0015] Preferably, a plurality of slag discharge holes are evenly formed in a circumferential direction at the end of the slag discharge cylinder away from the sliding ring. The slag discharge holes are semi-elliptical, and the minor axis of the semi-elliptical shape is located on the end face of the slag discharge cylinder away from the sliding ring.

[0016] Preferably, a stop block is respectively arranged on each of the positioning rods, and the stop block is located on the side of the sliding ring close to the slag discharge cylinder.

[0017] The beneficial effects of the present utility model are as follows:

[0018] 1. By providing an adjustment assembly and a limit assembly, the present utility model drives the worm to rotate through the knob, the rotation of the worm drives the worm wheel and the drive shaft to rotate, and drives the first bevel gear and the second bevel gear to rotate through the drive shaft. Furthermore, the straight rack is pushed up or down by the spur gear, and the two straight racks move towards or away from the stud at the same time. In this way, only by rotating the knob can the distance between the two limit plates be adjusted in one step. Therefore, the adjustment assembly is applicable to studs of different lengths, and the limit assembly is used to clamp studs of different diameters, so that the stud welding gun can be applicable to studs of various specifications, and the operation is convenient and fast.

[0019] 2. By providing a drive assembly with a worm wheel and a worm in the drive assembly, when the user rotates the knob located outside the housing, after the worm meshes with the worm wheel, the worm drives the worm wheel to rotate, and the drive shaft rotates, so that the limit assembly changes accordingly. When the user releases the knob, due to the self-locking property of the meshing of the worm wheel and the worm, the worm wheel will stop rotating, the first bevel gear will no longer drive the second bevel gear, so that the spur gear will no longer rotate, and the position of the straight rack will be fixed, preventing the limit plate from moving by itself, which is convenient for the user to use. Description of the Drawings

[0020] Figure 1 is a three-dimensional view of a stud welding gun of the present utility model Figure 1 .

[0021] Figure 2 is a three-dimensional view of a stud welding gun of the present utility model Figure 2 .

[0022] Figure 3 is a front view of a stud welding gun of the present utility model.

[0023] Figure 4 is a cross-sectional view of the outer sleeve and the housing in a stud welding gun of the present utility model.

[0024] Figure 5 is a schematic diagram of the limit assembly and the drive assembly in a stud welding gun of the present utility model.

[0025] Figure 6 is a schematic diagram of the positioning rod and the protection assembly in a stud welding gun of the present utility model. Detailed Embodiments

[0026] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments:

[0027] As Figures 1 to 6 shown, a stud welding gun includes a gun body 1 and an adjustment assembly provided at the front end of the gun body 1. The adjustment assembly includes an outer sleeve 2 and an inner sleeve 3. The outer sleeve 2 is sleeved outside the inner sleeve 3, and a limiting assembly is provided inside the outer sleeve 2. The limiting assembly includes a rotating shaft 4, a spur gear 5 is fixedly sleeved on the rotating shaft 4, a spur rack 6 is penetrated through the outer sleeve 2, and the spur rack 6 meshes with the spur gear 5. A housing 7 is connected to the outer wall of the outer sleeve 2, a driving assembly is provided inside the housing 7, and the part of the rotating shaft 4 passing through the outer sleeve 2 is connected to the driving assembly. The driving assembly includes a driving shaft 8, both ends of the driving shaft 8 are rotatably provided on the inner wall of the housing 7, the driving shaft 8 is perpendicular to the rotating shaft 4, a first bevel gear 9 is fixedly sleeved on the driving shaft 8, and a second bevel gear 10 is provided at the end of the rotating shaft 4 close to the driving shaft 8. The first bevel gear 9 and the second bevel gear 10 mesh with each other.

[0028] Specifically, two rotating shafts 4 are provided, and the two rotating shafts 4 are symmetrically distributed up and down inside the outer sleeve 2. By providing the driving assembly, the first bevel gear 9 and the second bevel gear 10 form a gear pair to transmit the rotational force of the driving shaft 8 to the rotating shaft 4. When the driving shaft 8 rotates, it drives the first bevel gear 9 and the second bevel gear 10 to rotate, and then pushes the spur rack 6 to rise or fall through the spur gear 5, so that the distance between the two limiting plates 11 can be adjusted.

[0029] In this embodiment, a limiting plate 11 is provided on the part of the spur rack 6 located inside the housing 7, and a boss 12 is provided on the part of the spur rack 6 passing through the outer sleeve 2 and located inside the housing 7. Among them, the limiting plate 11 is an arc-shaped plate.

[0030] Furthermore, the driving assembly further includes a worm gear 13 fixedly sleeved on the driving shaft 8, a worm 14 is provided inside the housing 7, a knob 15 is provided at one end of the worm 14 passing through the housing 7, and the other end of the worm 14 is rotatably provided on the inner wall of the housing 7. By providing the worm gear 13 and the worm 14, when the user rotates the knob 15 outside the housing 7, after the worm 14 meshes with the worm gear 13, the worm 14 drives the worm gear 13 to rotate, and then the driving shaft 8 rotates, so that the limiting assembly changes accordingly. When the user releases the knob 15, due to the self-locking property of the meshing between the worm gear 13 and the worm 14, the worm gear 13 will stop rotating, the first bevel gear 9 will no longer drive the second bevel gear 10, so that the spur gear 5 will no longer rotate, and the position of the spur rack 6 will be fixed, preventing the limiting plate 11 from moving by itself, which is convenient for the user to use.

[0031] In this embodiment, one end of the inner sleeve 3 is connected to the gun body 1. A bolt 16 is arranged between the outer sleeve 2 and the inner sleeve 3. The bolt 16 is threadedly connected to the outer sleeve 2 through a threaded hole. A positioning hole 17 is formed in the inner sleeve 3. The positioning hole 17 matches the bolt 16. There are two groups of positioning holes 17 symmetrically distributed up and down, and each group of the positioning holes 17 has a plurality of them. Two bolts 16 are provided. By controlling the relative movement between the outer sleeve 2 and the inner sleeve 3 and fixing them with the bolts 16, it is applicable to studs of different lengths and can be adjusted according to the actual situation, avoiding unstable welding caused by short length and enhancing the practicability of the welding gun.

[0032] As an implementable manner, a positioning rod 18 is arranged on the side of the outer sleeve 2 away from the inner sleeve 3. There are three positioning rods 18, and the three positioning rods 18 are arranged in a circumferential array; one end of the positioning rod 18 is connected to the outer sleeve 2, and a support block 19 is arranged at the other end of the positioning rod 18.

[0033] Through the arranged positioning rod 18 and support block 19, the stability during welding can be further enhanced by using three equally spaced positioning rods 18. At the same time, after adding the support block 19, the support surface will be larger, effectively avoiding the inclination of the gun body 1 during welding, thereby preventing welding deviation caused by hand shaking during welding and ensuring the welding effect.

[0034] In addition, a protection component is further arranged on the side of the outer sleeve 2 away from the inner sleeve 3. The protection component includes a sliding ring 20 and a slag discharge cylinder 21. The slag discharge cylinder 21 is located on the side of the sliding ring 20 away from the outer sleeve 2. Three round holes 22 are formed in the sliding ring 20, and the three round holes 22 are arranged in a circumferential array. The three positioning rods 18 respectively penetrate through the corresponding round holes 22, and a spring 23 is sleeved on each positioning rod 18. The two ends of the spring 23 are respectively connected to the sliding ring 20 and the outer sleeve 2.

[0035] Among them, a plurality of slag discharge holes 24 are evenly formed in the circumferential direction at one end of the slag discharge cylinder 21 away from the sliding ring 20. The slag discharge holes 24 are semi-elliptical, and the minor axis of the semi-elliptical shape is located on the end surface of the slag discharge cylinder 21 away from the sliding ring 20.

[0036] Moreover, a stop block 25 is respectively arranged on each positioning rod 18, and the stop block 25 is located on the side of the sliding ring 20 close to the slag discharge cylinder 21. By arranging the stop block 25, the end surface of the slag discharge cylinder 21 away from the sliding ring 20 protrudes from the end surface of the support block 19 away from the positioning rod 18, that is, the slag discharge cylinder 21 protrudes from the support block 19.

[0037] By setting the protection component, the range of welding slag spatter is reduced. Further, by setting the stop block 25 and cooperating with the spring 23, when the gun body 1 is supported by the support block 19, the spring 23 is compressed, and the slag discharge cylinder 21 always contacts the workpiece, preventing welding slag from falling into the gap formed between the slag discharge cylinder 21 and the workpiece. The flying sparks during welding can be discharged from the slag discharge holes 24 in time.

[0038] The usage direction of this product is as follows:

[0039] First, before welding, the stud 26 is clamped onto the gun body 1. The stud 26 is placed into the outer sleeve 2, and the knob 15 is rotated to adjust the distance between the two limit plates 11 to become smaller, so that the two limit plates 11 clamp the stud 26. After the stud 26 is clamped, the welding operation is carried out next: First, the slag discharge cylinder 21 contacts the workpiece, and then the gun body 1 is pressed. After the support block 19 and the stud 26 vertically contact the workpiece, the stud welding gun switch device is activated to connect the power supply and start welding. After welding is completed, the knob 15 is rotated in the reverse direction to adjust the distance between the two limit plates 11 to become larger again for the next clamping.

[0040] The specific operation method for adjusting the distance between the two limit plates 11 to become smaller or larger is as follows: The worm 14 is driven to rotate by the knob 15. The rotation of the worm 14 drives the worm gear 13 and the drive shaft 8 to rotate, and the drive shaft 8 drives the bevel gear one 9 and the bevel gear two 10 to rotate. Then, the straight rack 6 is pushed up or down by the spur gear 5. Please refer to Figure 3 again. The two straight racks 6 move towards the direction close to the stud 26 or away from the stud 26 at the same time, thereby completing the adjustment of the distance between the two limit plates 11.

[0041] In summary, through the adjustment component and the limit component of the present utility model, the adjustment component is applicable to studs of different lengths, and at the same time, the limit component is used to clamp studs of different diameters, so that this stud welding gun can achieve the effect of being applicable to studs of multiple specifications, and the operation is convenient and fast.

[0042] The above-described embodiments are only the preferred embodiments of the present utility model and do not limit the scope of implementation of the present utility model. Therefore, any equivalent changes or modifications made according to the structure, features, and principles described in the scope of the present utility model patent should be included within the scope of the patent application of the present utility model.

Claims

1. A stud welding gun, characterized in that, It includes a gun body (1) and an adjustment component arranged at the front end of the gun body (1). The adjustment component includes an outer sleeve (2) and an inner sleeve (3). The outer sleeve (2) is sleeved outside the inner sleeve (3), and a limiting component is arranged inside the outer sleeve (2). The limiting component includes a rotating shaft (4). A spur gear (5) is fixedly sleeved on the rotating shaft (4). A spur rack (6) is arranged through the outer sleeve (2). The spur rack (6) meshes with the spur gear (5). A housing (7) is connected to the outer wall of the outer sleeve (2). A driving component is arranged inside the housing (7). The part of the rotating shaft (4) passing through the outer sleeve (2) is connected to the driving component. The driving component includes a driving shaft (8). Both ends of the driving shaft (8) are rotatably arranged on the inner wall of the housing (7). The driving shaft (8) is perpendicular to the rotating shaft (4). A first bevel gear (9) is fixedly sleeved on the driving shaft (8). A second bevel gear (10) is arranged at the end of the rotating shaft (4) close to the driving shaft (8). The first bevel gear (9) and the second bevel gear (10) mesh with each other.

2. The stud welding gun according to claim 1, characterized in that, There are two rotating shafts (4), and the two rotating shafts (4) are symmetrically distributed up and down inside the outer sleeve (2).

3. A stud welding gun according to claim 1, characterized in that, A limiting plate (11) is arranged on the part of the spur rack (6) located inside the housing (7). A boss (12) is arranged on the part of the spur rack (6) passing through the outer sleeve (2) and located inside the housing (7).

4. A stud welding gun according to claim 1, characterized in that, The driving component further includes a worm gear (13) fixedly sleeved on the driving shaft (8). A worm (14) is arranged inside the housing (7). One end of the worm (14) passing through the housing (7) is provided with a knob (15), and the other end of the worm (14) is rotatably arranged on the inner wall of the housing (7).

5. A stud welding gun according to claim 1, characterized in that, One end of the inner sleeve (3) is connected to the gun body (1). A bolt (16) is arranged between the outer sleeve (2) and the inner sleeve (3). The bolt (16) is threadedly connected to the outer sleeve (2) through a threaded hole. A positioning hole (17) is opened on the inner sleeve (3). The positioning hole (17) matches the bolt (16). There are two groups of positioning holes (17) symmetrically distributed up and down, and each group of positioning holes (17) has multiple ones. There are two bolts (16).

6. A stud welding gun according to claim 1, characterized in that, A positioning rod (18) is arranged on the side of the outer sleeve (2) away from the inner sleeve (3). There are three positioning rods (18), and the three positioning rods (18) are arranged in a circular array. One end of the positioning rod (18) is connected to the outer sleeve (2), and a support block (19) is arranged at the other end of the positioning rod (18).

7. A stud welding gun according to claim 6, characterized in that, On the side of the outer sleeve (2) away from the inner sleeve (3), a protective component is further provided. The protective component includes a sliding ring (20) and a slag discharge cylinder (21). The slag discharge cylinder (21) is located on the side of the sliding ring (20) away from the outer sleeve (2). Three circular holes (22) are formed in the sliding ring (20), and the three circular holes (22) are distributed in a circumferential array. The three positioning rods (18) respectively penetrate through the corresponding circular holes (22), and a spring (23) is sleeved on each positioning rod (18). The two ends of the spring (23) are respectively connected to the sliding ring (20) and the outer sleeve (2).

8. A stud welding gun according to claim 7, characterized in that, A plurality of slag discharge holes (24) are evenly formed in the circumferential direction at one end of the slag discharge cylinder (21) away from the sliding ring (20). The slag discharge holes (24) are semi-elliptical, and the minor axis of the semi-elliptical shape is located on the end face of the slag discharge cylinder (21) away from the sliding ring (20).

9. A stud welding gun according to claim 7, characterized in that, A stop block (25) is respectively provided on each positioning rod (18), and the stop block (25) is located on the side of the sliding ring (20) close to the slag discharge cylinder (21).

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