Welding head assemblies and welding devices

Abstract

The present invention provides a welding head assembly and a welding device. The welding head assembly includes a rotary drive device, a transmission mechanism, a rotating shaft, a roll welding wheel, a mounting frame, a movable block and an adjustment mechanism. The roll welding wheel is sleeved on the rotary shaft. The rotary drive device drives the rotating shaft to rotate through the transmission mechanism to drive the roll welding wheel to rotate. A first self-aligning bearing is provided on the mounting frame; the movable block is provided on the mounting frame, and the movable block is provided with a second self-aligning bearing. The rotating shaft is inserted into the first self-aligning bearing and the second self-aligning bearing, and the first self-aligning bearing is located between the roll welding wheel and the second self-aligning bearing; the adjustment mechanism is provided on the mounting frame, and the adjustment mechanism can force the movable block to move in a first direction, thereby driving the two ends of the rotating shaft to swing in the first direction with the first self-aligning bearing as a fulcrum; the welding device includes an ultrasonic welding assembly and the above-mentioned welding head assembly, and the welding head assembly and the ultrasonic welding assembly are arranged relative to each other; the present invention can level the rotating shaft to ensure bilateral welding of the roll welding wheel.

Description

Technical Field

[0001] The present invention relates to the field of welding equipment, in particular to a welding head assembly and a welding device. Background Art

[0002] A welding device is currently available, comprising a motor, a chain drive mechanism, a central shaft, a seam welding wheel, a base, a bearing, and a welding table. The central shaft is rotatably mounted on the base via a bearing, and the seam welding wheel is sleeved onto the central shaft. The motor drives the central shaft through the chain drive mechanism, which in turn drives the seam welding wheel. An ultrasonic welder is mounted on the welding table, and the ultrasonic welding head of the ultrasonic welder is positioned below the seam welding wheel. The seam welding wheel and the ultrasonic welding head cooperate to complete the welding operation.

[0003] In theory, the center axis is horizontal and the roll welder is vertical, making the left and right sides of the roll welder's weld zone essentially flush, enabling normal double-sided welding. However, in practice, due to manufacturing and assembly errors in the base, bearings, and center axis, and the weight of the roll welder, the center axis can tilt to a certain degree, resulting in one side of the roll welder's weld zone being higher than the other. This can easily lead to one-sided welding, which in turn affects weld quality. Summary of the Invention

[0004] The first object of the present invention is to provide a welding head assembly which ensures double-sided welding of a rolling welding wheel by leveling a rotating axis.

[0005] A second object of the present invention is to provide a welding device comprising the above-mentioned welding head assembly.

[0006] In order to achieve the above-mentioned first purpose, the present invention provides a welding head assembly, including a rotary drive device, a transmission mechanism, a rotating shaft, a rolling welding wheel, a mounting frame, a movable block and an adjustment mechanism. The rolling welding wheel is sleeved on the rotating shaft, and the rotary drive device drives the rotating shaft to rotate through the transmission mechanism, thereby driving the rolling welding wheel to rotate. A first self-aligning bearing is provided on the mounting frame; the movable block is slidably provided on the mounting frame, and a second self-aligning bearing is provided on the movable block. The rotating shaft is simultaneously inserted into the first self-aligning bearing and the second self-aligning bearing, and the first self-aligning bearing is located between the rolling welding wheel and the second self-aligning bearing; the adjustment mechanism is provided on the mounting frame, and the adjustment mechanism can force the movable block to move in the first direction, thereby driving the two ends of the rotating shaft to swing in the first direction with the first self-aligning bearing as the fulcrum.

[0007] It can be seen from the above scheme that when the movable block drives the second self-aligning bearing to move along the first direction, it can force the rotating shaft to swing up and down in the first direction with the first self-aligning bearing as the fulcrum, so as to adjust the rotating shaft to a horizontal state, thereby ensuring that the left and right sides of the welding area of the rolling welding wheel are in a horizontal state, realizing the leveling function, ensuring bilateral welding, and improving the welding quality; this embodiment forces the movable block to move up and down through the adjustment mechanism, thereby adjusting the horizontal state of the rotating shaft, and also has the advantages of simple structure and easy operation.

[0008] A further solution is that the adjustment mechanism includes a limit block, a wedge block and an adjusting piece, a movable cavity is opened in the limit block, the wedge block is movably arranged in the movable cavity, the wedge block is provided with a first abutting portion for pushing the movable block to move, the adjusting piece passes through the limit block and extends into the movable cavity, and the adjusting piece can abut against the wedge block to force the wedge block to move along the first direction.

[0009] It can be seen from the above scheme that through the above setting, the adjusting member forces the wedge block to move up and down, and the wedge block pushes the movable block to move downward, which is beneficial to increase the contact area acting on the movable block and ensure that the movable block moves downward smoothly.

[0010] A further solution is that a first inclined surface is provided in the movable cavity, the first inclined surface extends obliquely along the first direction, and the wedge block is provided with a second inclined surface that cooperates with the first inclined surface; the adjusting member can move along the second direction, and the adjusting member forces the wedge block to move along the first direction while moving along the second direction, and the second direction is perpendicular to the first direction.

[0011] It can be seen from the above scheme that, through the above arrangement, the horizontal movement of the adjusting member drives the wedge block to move up and down with the cooperation of the first inclined surface and the second inclined surface, which is conducive to converting the horizontal movement into up and down movement, and is convenient for the staff to adjust the adjusting member from the side. Compared with the scheme of adjusting the adjusting member from the top side, it has the advantages of large operating space and convenient adjustment operation.

[0012] A further solution is that the number of the adjusting members is set to two, and the two adjusting members are respectively arranged on both sides of the wedge block in the second direction; and one end of each of the two adjusting members abuts against the corresponding side wall of the wedge block.

[0013] It can be seen from the above scheme that through the above settings, the two adjusting parts are respectively arranged on both sides of the wedge block. When necessary, the staff first moves the first adjusting part outward, and then moves the second adjusting part inward to push the wedge block to move in the direction of the first adjusting part. That is, the staff needs to adjust the two adjusting parts separately. Setting the adjusting parts on both sides can effectively prevent the wedge block from moving to both sides, ensuring its position accuracy in the up and down directions, and avoiding displacement during welding.

[0014] A further solution is that the number of adjusting parts is set to one, and one end of the adjusting part abuts against the first side wall of the wedge block; an elastic part is provided in the movable cavity, and the adjusting part and the elastic part are respectively provided on both sides of the second direction of the wedge block, and the elastic part elastically abuts between the cavity wall of the movable cavity and the second side wall of the wedge block.

[0015] It can be seen from the above scheme that through the above arrangement, the adjusting member and the elastic member are respectively arranged on both sides of the wedge block. When necessary, the staff moves the adjusting member outward or inward to push the wedge block to move. That is, with the cooperation of the elastic member, the staff only needs to adjust one adjusting member to realize the movement of the wedge block in two directions, which has the advantage of convenient operation.

[0016] In a further solution, the limit block is provided with a first matching portion at one end close to the movable block, and the first matching portion extends along the second direction; a second matching portion is provided on the movable block, and the second matching portion is matched with the first matching portion in a concave-convex manner and can form a stop in a third direction, and the third direction is perpendicular to the first direction and the second direction respectively.

[0017] It can be seen from the above scheme that the above setting is conducive to limiting the position deviation of the movable block in the third direction, ensuring that the movable block can only move in the up and down directions, and further ensuring that the rotating shaft can only swing in the up and down directions.

[0018] A further solution is that the adjusting member is arranged on a side of the wedge block facing away from the movable block, the adjusting member can move along the first direction, and the adjusting member forces the movable block to move along the first direction through the wedge block.

[0019] It can be seen from the above scheme that through the above setting, the adjusting member is set above the wedge block, the adjusting member can move up and down, and push the movable block downward through the wedge block, which is conducive to increasing the contact area acting on the movable block and ensuring smooth movement of the movable block.

[0020] A further solution is that a guide assembly is provided on the mounting frame, the guide assembly extends along a first direction, and the movable block is slidably connected to the guide assembly.

[0021] It can be seen from the above scheme that the above arrangement is conducive to limiting the movable block to move only in the up and down directions, thereby limiting the two ends of the rotating shaft from swinging in the up and down directions.

[0022] A further solution is that an adjustment hole is opened on the movable block, and a locking hole is opened on the mounting frame. The movable block is connected to the mounting frame through a locking piece. The locking piece passes through the adjustment hole and is connected in the locking hole, and the locking piece can adjust its position relatively along the first direction in the adjustment hole.

[0023] It can be seen from the above scheme that through the above setting, when the movable block is adjusted into place, the current position of the movable block is fixed by tightening the locking piece to avoid position displacement of the movable block during the welding process, thereby preventing the rolling welding wheel and the rotating shaft from tilting.

[0024] In order to achieve the above-mentioned second objective, the present invention provides a welding device, comprising an ultrasonic welding assembly and the above-mentioned welding head assembly, wherein the welding head assembly and the ultrasonic welding assembly are arranged relative to each other along a first direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural diagram of the first embodiment of the welding head assembly of the present invention.

[0026] Figure 2 It is an exploded view of the first embodiment of the welding head assembly of the present invention.

[0027] Figure 3 It is a cross-sectional view of the first embodiment of the welding head assembly of the present invention from a first viewing angle.

[0028] Figure 4 Schematic diagram of the roll welding wheel and the rotating shaft in the first embodiment of the welding head assembly of the present invention.

[0029] Figure 5 It is a cross-sectional view of the first embodiment of the welding head assembly of the present invention from a second viewing angle.

[0030] Figure 6 It is a cross-sectional view of a second embodiment of a welding head assembly of the present invention.

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0032] The first embodiment of the welding head assembly:

[0033] See also Figures 1 to 5 The welding head assembly provided in this embodiment includes a mounting frame 1, a movable block 2, a rotation drive device 3, a transmission mechanism 4, a rotating shaft 5, a rolling welding wheel 6 and an adjustment mechanism 7.

[0034] For the convenience of explanation, the vertical direction is set as the first direction Z, the front-to-back direction is set as the second direction X, and the left-to-right direction is set as the third direction Y.

[0035] The mounting frame 1 extends along a first direction Z. The rotation drive device 3 is disposed on the upper portion of the mounting frame 1. A first self-aligning bearing 11 and a movable block 2 are disposed on the lower portion of the mounting frame 1. The movable block 2 is provided with a second self-aligning bearing 21. The first self-aligning bearing 11 and the second self-aligning bearing 21 are arranged in parallel along a third direction Y. The first self-aligning bearing 11 is a self-aligning ball bearing or a self-aligning roller bearing; the second self-aligning bearing 21 is a self-aligning ball bearing or a self-aligning roller bearing.

[0036] The rotating shaft 5 extends along the third direction Y. A seam welding wheel 6 is sleeved onto the first end of the rotating shaft 5, perpendicular to the rotating shaft 5 and capable of rotating synchronously with the rotating shaft 5 in the same direction. The central portion of the rotating shaft 5 is housed in a first self-aligning bearing 11, and the second end of the rotating shaft 5 is housed in a second self-aligning bearing 21. The seam welding wheel 6 is provided with a plurality of protrusions arranged in rows, each row spaced apart along the circumference of the seam welding wheel 6. The protrusions in adjacent rows are staggered along the thickness of the seam welding wheel 6.

[0037] The transmission mechanism 4 is arranged between the upper and lower parts of the mounting frame 1. The mounting frame 1 is provided with a groove extending along the first direction Z, and the transmission mechanism 4 is arranged in the groove. The rotary drive device 3 drives the rotary shaft 5 to rotate through the transmission mechanism 4, thereby driving the rolling welding wheel 6 to rotate synchronously in the same direction. The transmission mechanism 4 includes a driving wheel 41, a driven wheel 42 and a transmission member 43. The driving wheel 41 is sleeved on the driving shaft of the rotary drive device 3, and the driven wheel 42 is sleeved on the middle part of the rotary shaft 5, and the driven wheel 42 is located between the first self-aligning bearing 11 and the second self-aligning bearing 21. The transmission member 43 is connected between the driving wheel 41 and the driven wheel 42. In this embodiment, the rotary drive device 3 is preferably a motor. The transmission mechanism 4 can be a belt transmission mechanism or a chain transmission mechanism. In this embodiment, the former is preferably used, that is, the driving wheel 41 and the driven wheel 42 are both pulleys, and the transmission member 43 is a belt.

[0038] In theory, the rotating axis 5 of this embodiment extends horizontally along the third direction Y. However, in practice, due to manufacturing and assembly errors and the weight of the seam welding wheel 6, the end of the rotating axis 5 on which the seam welding wheel 6 is mounted tends to tilt downward. Specifically, the rotating axis 5 intersects the horizontal at an angle θ, resulting in one high and one low welding area of the seam welding wheel 6. This can easily lead to "one-sided welding" during welding. In this embodiment, the welding area is the localized circumferential wall of the seam welding wheel 6 at its lowest point. One-sided welding occurs when only one side of the welding area is effectively welded, while the other side is ineffective.

[0039] To overcome this problem, this embodiment uses a self-aligning bearing and is provided with an adjustment mechanism 7. Since the self-aligning bearing can accommodate angular deviations between the axis lines of the inner and outer rollers, the rotating shaft 5 can swing at a small angle within the self-aligning bearing. This facilitates the adjustment mechanism 7 to level the rotating shaft 5 without affecting the normal rotation of the rotating shaft 5. This allows the rotating shaft 5 to overcome the error and the influence of gravity of the seam welding wheel 6 and remain in a horizontal state for a long time.

[0040] The adjustment mechanism 7 is arranged on the mounting frame 1 and above the movable block 2. The adjustment mechanism 7 can force the movable block 2 to move a small distance along the first direction Z, and then drive the two ends of the rotating shaft 5 to swing at a small angle in the first direction Z with the first self-aligning bearing 11 as the fulcrum through the second self-aligning bearing 21, ensuring that the rotating shaft 5 is adjusted to a horizontal state; when the rotating shaft 5 is adjusted to a horizontal state, the welding area of the rolling wheel 6 is in a horizontal state, and bilateral welding can be achieved to improve the welding quality.

[0041] Combine Figure 3 and Figure 4 The first self-aligning bearing 11 is located between the seam welding wheel 6 and the second self-aligning bearing 21. In the axial direction of the rotating shaft 5, the distance between the seam welding wheel 6 and the first self-aligning bearing 11 is less than or equal to the distance between the second self-aligning bearing 21 and the first self-aligning bearing 11. This facilitates the adjustment mechanism 7 to propel the rotating shaft 5 up and down with minimal force. Furthermore, when adjusting the rotating shaft 5, the distance H that the end of the rotating shaft 5 attached to the second self-aligning bearing 21 moves in the first direction Z is greater than the distance h that the end of the rotating shaft 5 attached to the seam welding wheel 6 moves in the first direction Z. This facilitates fine-tuning the angle of the rotating shaft 5 and reduces the risk of over-adjustment.

[0042] Combine Figure 2 and Figure 5 The adjustment mechanism 7 includes a limit block 71, a wedge block 72 and two adjusting members 73a.

[0043] A movable cavity 711 is defined within the limiting block 71, opening toward the movable block 2. A first inclined surface 7111 is provided on a wall of the movable cavity 711 opposite the opening. The first inclined surface 7111 extends obliquely along the first direction Z. In this embodiment, the first inclined surface 7111 extends obliquely from the opposite direction of the first direction Z toward the positive direction of the second direction X.

[0044] The wedge block 72 is movably disposed within the movable cavity 711. The width of the movable cavity 711 in the second direction X is greater than the width of the wedge block 72, enabling the wedge block 72 to move within the movable cavity 711 along the second direction X. Furthermore, a first abutting portion 721 is provided at the bottom of the wedge block 72, extending out of the opening of the movable cavity 711. A second abutting portion is provided at the top of the movable block 2, abutting against the first abutting portion 721 and pushing the movable block 2 downward. A second inclined surface 722 is provided at the top of the wedge block 72, cooperating with and sliding relative to the first inclined surface 7111.

[0045] When the wedge block 72 moves forward along the second direction X, the wedge block 72 moves downward along the first direction Z at the same time; when the wedge block 72 moves backward along the second direction X, the gravity of the seam welding wheel 6 forces the end of the rotating shaft 5 inserted into the second self-aligning bearing 21 to tilt upward, so that the movable block 2 moves upward along the first direction Z, so that the upper part of the movable block 2 is always in contact with the wedge block 72, so that the movable block 2 can be immediately pushed downward by the wedge block 72 next time.

[0046] To push the wedge block 72 to move along the second direction X, two adjusting members 73a are provided on either side of the wedge block 72 in the second direction X. The adjusting members 73a extend through the stop block 71 into the active cavity 711, so that one end of each adjusting member 73a abuts against the sidewalls of the wedge block 72. Specifically, the stop block 71 defines mounting holes 712 on both sides of the active cavity 711 in the second direction X, each of which is connected to the active cavity 711. The mounting holes 712 are preferably screw holes. The adjusting members 73a are preferably screws, which are threadedly connected to the mounting holes 712 and abut against the wedge block 72. By turning the adjusting members 73a, the adjusting members 73a are moved in the second direction X, thereby forcing the wedge block 72 to move in the first direction Z while simultaneously moving in the second direction X.

[0047] For example: Figure 5 When the wedge block 72 needs to be adjusted downward, first loosen the adjusting piece 73a on the right side to separate the adjusting piece 73a on the right side from the wedge block 72, leaving enough space for the wedge block 72 to move to the right; then tighten the adjusting piece 73a on the left side to make the adjusting piece 73a on the left side push the wedge block 72 to move to the right; with the cooperation of the first inclined surface 7111 and the second inclined surface 722, the wedge block 72 simultaneously pushes the movable block 2 to move downward, thereby forcing the rotating shaft 5 to swing in the first direction Z; after the rotating shaft 5 is adjusted to a horizontal state, tighten the adjusting piece 73a on the right side to ensure that the wedge block 72 can be fixed in the current position for a long time.

[0048] The two adjusting members 73 a of this embodiment are respectively arranged on both sides of the limiting block 71 in the second direction X, which has the advantage of a larger operating space and is convenient for workers to turn the adjusting members 73 a.

[0049] Combine Figure 2 and Figure 3 The limit block 71 is provided with a first matching portion 713 at one end close to the movable block 2, and the first matching portion 713 extends along the second direction X. The movable block 2 is provided with a second matching portion 22, and the second matching portion 22 is matched with the first matching portion 713 in a concave-convex manner and forms a stop in the third direction Y, and the second matching portion 22 and the first matching portion 713 can move relative to each other along the first direction Z. Specifically, the first matching portion 713 is set as a protrusion, and the second matching portion 22 is set as an L-shaped groove, and the protrusion is inserted into the L-shaped groove. The depth of the first matching portion 713 inserted into the second matching portion 22 is greater than the moving distance of the movable block 2 in the first direction Z, ensuring that the first matching portion 713 and the second matching portion 22 are always matched in a concave-convex manner and do not disengage.

[0050] A guide assembly 8 is also provided in the groove of the mounting frame 1. The guide assembly 8 includes a slide rail 81 and a slider 82. The slide rail 81 extends along the first direction Z. The slider 82 is slidably connected to the slide rail 81. The movable block 2 is fixed to the slider 82, so that the movable block 2 moves along the extension direction of the slide rail 81, ensuring that the movable block 2 moves along the first direction Z.

[0051] The movable block 2 has adjustment holes 23 on both sides of the second direction X. These holes 23 are oval-shaped and extend longitudinally along the first direction Z. The mounting frame 1 has two locking holes 12 on its lower portion, one on each side of the groove, with each corresponding adjustment hole 23. The movable block 2 is connected to the mounting frame 1 via a locking member (not shown). The locking member is a screw, and the locking holes 12 are threaded. The locking member passes through the adjustment hole 23 and is attached thereto. The locking member can be adjusted relative to the adjustment hole 23 along the first direction Z.

[0052] After the movable block 2 is adjusted into position in the first direction Z, that is, the rotating shaft 5 is leveled, the locking piece is tightened to lock the movable block 2 and the mounting frame 1 to ensure that the current position of the movable block 2 will not shift during the welding process, and to ensure that the rotating shaft 5 can be in a horizontal state for a long time, and the rolling welding wheel 6 can always maintain a bilateral welding state.

[0053] Second embodiment of welding head assembly:

[0054] See also Figure 6 Based on the first embodiment of the welding head assembly mentioned above, the number of adjusting members 73b in the welding head assembly provided in this embodiment is set to one, and one end of the adjusting member 73b passes through the limit block 71 and extends into the active cavity 711 and abuts against the left side wall of the wedge block 72.

[0055] An elastic member 74 is provided in the movable cavity 711. The adjustment member 73b and the elastic member 74 are respectively provided on both sides of the wedge block 72 in the second direction X. The elastic member 74 elastically abuts between the cavity wall of the movable cavity 711 and the right side wall of the wedge block 72. The elastic member 74 is preferably a compression spring.

[0056] To prevent the elastic member 74 from falling off, a first mounting groove is defined on the right side wall of the movable cavity 711, into which one end of the elastic member 74 is disposed, and / or a second mounting groove is defined on the right side wall of the wedge block 72, into which the other end of the elastic member 74 is disposed. The former is preferred in this embodiment.

[0057] When needed, by tightening the adjusting member 73b, the wedge block 72 is pushed to the right. During this process, the wedge block 72 compresses the elastic member 74 and pushes the movable block 2 downward. The adjusting member 73b of this embodiment is arranged on the left side of the limit block 71. This not only has the advantages of a larger operating space and convenient operation for the operator, but also the operator only needs to turn the adjusting member 73b on one side, making the adjustment operation simpler and more convenient.

[0058] The third embodiment of the welding head assembly:

[0059] Building upon the first embodiment of the welding head assembly described above, this embodiment provides a welding head assembly in which an adjustment member is positioned on the side of the wedge block facing away from the movable block, i.e., above the wedge block. The adjustment member can move in a first direction to push the wedge block downward, which in turn pushes the movable block downward. This embodiment's wedge block moves only in the first direction, making it suitable for applications where it is inconvenient to turn the adjustment member from both the front and rear sides.

[0060] In this embodiment, the adjusting member pushes the movable block downward through the wedge block. Compared with the solution of directly using the adjusting member to push the movable block downward, the contact area of the movable block in this embodiment is larger, which is conducive to ensuring that the movable block moves downward smoothly.

[0061] Welding device embodiment:

[0062] The welding device provided in this embodiment includes an ultrasonic welding assembly and a welding head assembly according to any of the above embodiments. The welding head assembly and the ultrasonic welding assembly are arranged relative to each other along a first direction. The ultrasonic welding assembly includes an ultrasonic welding head, which is arranged directly below the roll welding wheel.

[0063] In summary, it can be seen that when the movable block drives the second self-aligning bearing to move along the first direction, the present invention can force the rotating shaft to swing up and down in the first direction with the first self-aligning bearing as the fulcrum, so as to adjust the rotating shaft to a horizontal state, thereby ensuring that the left and right sides of the welding area of the rolling welding wheel are in a horizontal state, realizing the leveling function, ensuring bilateral welding, and improving the welding quality; this embodiment forces the movable block to move up and down through the adjustment mechanism, thereby adjusting the horizontal state of the rotating shaft, and also has the advantages of simple structure and easy operation.

[0064] Finally, it should be emphasized that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A welding head assembly, comprising a rotary drive device, a transmission mechanism, a rotary shaft, and a roll welding wheel, wherein the roll welding wheel is sleeved on the rotary shaft, and the rotary drive device drives the rotary shaft to rotate through the transmission mechanism, thereby driving the roll welding wheel to rotate, characterized in that: Also includes: A mounting frame, wherein a first self-aligning bearing is provided on the mounting frame; A movable block, wherein the movable block is slidably disposed on the mounting frame, and a second self-aligning bearing is disposed on the movable block. The rotating shaft is inserted into the first self-aligning bearing and the second self-aligning bearing at the same time, and the first self-aligning bearing is located between the seam welding wheel and the second self-aligning bearing; an adjustment mechanism, the adjustment mechanism being disposed on the mounting frame and capable of forcing the movable block to move in a first direction, thereby driving both ends of the rotating shaft to swing in the first direction with the first self-aligning bearing as a fulcrum; The adjustment mechanism includes a limit block, a wedge block, and an adjusting member. A movable cavity is defined in the limit block. The wedge block is movably disposed in the movable cavity. The wedge block is provided with a first abutting portion for pushing the movable block to move. The adjusting member passes through the limit block and extends into the movable cavity. The adjusting member can abut against the wedge block to force the wedge block to move in a first direction. A first inclined surface is provided in the movable cavity, the first inclined surface extends obliquely along a first direction, and the wedge block is provided with a second inclined surface matching the first inclined surface; The adjusting member is movable along a second direction. The adjusting member forces the wedge to move along the first direction while moving along the second direction. The second direction is perpendicular to the first direction.

2. The welding head assembly according to claim 1, characterized in that: The number of the adjusting members is set to two, and the two adjusting members are respectively arranged on both sides of the wedge block in the second direction, and one end of each of the two adjusting members is respectively in contact with the corresponding side wall of the wedge block.

3. The welding head assembly according to claim 1, characterized in that: The number of the adjusting member is set to one, and one end of the adjusting member abuts against the first side wall of the wedge block; An elastic member is provided in the movable cavity. The adjusting member and the elastic member are respectively provided on both sides of the wedge block in the second direction. The elastic member elastically abuts between the cavity wall of the movable cavity and the second side wall of the wedge block.

4. The welding head assembly according to claim 1, characterized in that: The limiting block is provided with a first matching portion at one end close to the movable block, and the first matching portion extends along the second direction; The movable block is provided with a second matching portion, which is matched with the first matching portion in a concave-convex manner and can form a stop in a third direction, and the third direction is perpendicular to the first direction and the second direction respectively.

5. The welding head assembly according to claim 1, characterized in that: The adjusting member is arranged on a side of the wedge block facing away from the movable block. The adjusting member can move along a first direction. The adjusting member forces the movable block to move along the first direction through the wedge block.

6. The welding head assembly according to claim 1, characterized in that: The mounting frame is provided with a guide assembly, the guide assembly extends along a first direction, and the movable block is slidably connected to the guide assembly.

7. The welding head assembly according to claim 1, characterized in that: An adjustment hole is provided on the movable block, and a locking hole is provided on the mounting frame. The movable block is connected to the mounting frame through a locking piece. The locking piece passes through the adjustment hole and is connected to the locking hole, and the locking piece can relatively adjust its position along a first direction in the adjustment hole.

8. Welding device, characterized in that: It comprises an ultrasonic welding assembly and a welding head assembly according to any one of claims 1 to 7, wherein the welding head assembly and the ultrasonic welding assembly are arranged opposite to each other along a first direction.

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