Bottom die and ultrasonic welding equipment

Abstract

The utility model discloses a bottom die and ultrasonic welding equipment, the bottom die has a first direction and a second direction which are intersected, the bottom die comprises a support and a main body, and the main body is arranged on one side of the support in the first direction and detachably connected with the support; the main body comprises a connecting part and a first working part, the connecting part is detachably connected with the support in the first direction, the first working part is arranged on one side of the connecting part in the second direction, and the first working part is connected with the connecting part. According to the bottom film, the support and the main body are detachably connected, the support and the main body are of a split type structure, the main body comprises the first working part for welding work, the main body and the support can be detached after the first working part is abraded, continuous use of the bottom film can be achieved only by replacing the main body, and compared with an integrated bottom film, the bottom film has the advantages that the structure is simple, and cost is low. The service life of the bottom die is effectively prolonged, and the cost of the bottom die is reduced.

Description

Technical Field

[0001] This application belongs to the technical field of ultrasonic welding, and particularly relates to a bottom mold and an ultrasonic welding device. Background Art

[0002] The ultrasonic welding device is used to gather multiple wires together and weld them into a bundle. Among them, the bottom mold is used to press multiple wires and cooperate with the welding head for welding. During this process, the bottom mold will be worn, resulting in a reduction in the overall service life of the bottom film. Summary of the Utility Model

[0003] Utility Model Objective: The embodiments of this application provide a bottom film, aiming to solve the problem that the overall service life of the existing bottom film is reduced due to wear. By setting a split-type bracket and main body, when the working part of the main body is worn, the bottom mold can continue to be used by replacing the main body, effectively extending the overall service life of the bottom mold and reducing the cost of the bottom mold; Another objective of the embodiments of this application is to provide an ultrasonic welding device.

[0004] Technical Solution: A bottom mold described in the embodiments of this application has an intersecting first direction and second direction, and includes a bracket and a main body. The main body is arranged on one side of the bracket along the first direction and is detachably connected to the bracket; the main body includes a connecting part and a first working part. The connecting part is detachably connected to the bracket along the first direction, the first working part is arranged on one side of the connecting part along the second direction, and the first working part is connected to the connecting part.

[0005] Beneficial Effects: Compared with the prior art, a bottom mold in the embodiments of this application has an intersecting first direction and second direction, and includes a bracket and a main body. The main body is arranged on one side of the bracket along the first direction and is detachably connected to the bracket; the main body includes a connecting part and a first working part. The connecting part is detachably connected to the bracket along the first direction, the first working part is arranged on one side of the connecting part along the second direction, and the first working part is connected to the connecting part. The bottom film of this application realizes that the bracket and the main body are of a split structure by setting the bracket and the main body to be detachably connected. Among them, the main body includes a first working part for welding work. After the first working part is worn, the main body can be separated from the bracket, and the bottom film can continue to be used only by replacing the main body. Compared with the integral bottom mold, the service life of the bottom mold is effectively improved, and the cost of the bottom mold is reduced.

[0006] Compared with the prior art, an ultrasonic welding device in the embodiments of this application includes the bottom mold in any one of the foregoing embodiments. It can be understood that this ultrasonic welding device includes all the technical features and technical effects of the foregoing bottom mold, which will not be elaborated here. Description of the Drawings

[0007] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0008] Figure 1 It is a schematic diagram of the overall structure of a bottom mold in an embodiment of the present application;

[0009] Figure 2 It is an exploded view of a bottom mold in an embodiment of the present application;

[0010] Figure 3 It is a side view of a bottom mold in an embodiment of the present application along the third direction;

[0011] Figure 4 It is a side view of a bottom mold in an embodiment of the present application along the second direction;

[0012] Figure 5 is Figure 4 a cross-sectional view of the A-A section in;

[0013] Figure 6 It is a side view of the side where the main body of a bottom mold in an embodiment of the present application is located along the first direction;

[0014] Figure 7 It is a side view of the side where the bracket of a bottom mold in an embodiment of the present application is located along the first direction;

[0015] Figure 8 It is a schematic diagram of the overall structure of the main body of a bottom mold in an embodiment of the present application;

[0016] Figure 9 It is a side view of the side where the positioning groove of the main body of a bottom mold in an embodiment of the present application is located;

[0017] Figure 10 It is a schematic diagram of the overall structure of the bracket of a bottom mold in an embodiment of the present application;

[0018] Figure 11 It is a side view of the side where the positioning portion of the bracket of a bottom mold in an embodiment of the present application is located;

[0019] Figure 12 It is a schematic diagram when a bottom mold in an embodiment of the present application is specifically applied.

[0020] Reference numerals: 1, bracket; 11, first fixing hole; 12, fixing part; 121, second through hole; 122, third through hole; 123, second fixing hole; 13, positioning part; 2, main body; 21, connecting part; 211, first through hole; 212, positioning groove; 22, first working part; 221, first groove; 23, second working part; 231, second groove; 3, connecting piece; 4, welding head; 5, bottom die arm; 6, wire gathering block; X, first direction; Z, second direction; Y, third direction. Detailed implementation manners

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present application.

[0022] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, "a plurality" means two or more, and at least one means one, two or more, unless otherwise specifically defined. In the description of the present application, "vertical" means completely vertical at 90° or almost completely vertical. For example, within the range of an included angle of 80° to 100°, it is considered vertical. Similarly, "parallel" means completely parallel or almost completely parallel. For example, within the range of 10° of complete parallelism, it is considered parallel.

[0023] It should also be noted that in the drawings of the present application, an arrow marked with X indicates the first direction X, an arrow marked with Z indicates the second direction Z, and an arrow marked with Y indicates the third direction Y. Among them, the first direction X represents the arrangement direction of the bracket 1 and the main body 2, which can specifically be the length direction; the second direction Z represents the arrangement direction of the two first working parts 22, which can specifically be the height direction; the third direction Y represents the arrangement direction of the two second working parts 23, which can specifically be the width direction. And the first direction X, the second direction Z, and the third direction Y intersect with each other. Further, the first direction X, the second direction Z, and the third direction Y are perpendicular to each other. The introduction of the first direction X, the second direction Z, and the third direction Y is to facilitate the description of the specific structural position relationship of the bottom mold, and thus facilitate the understanding of its structure.

[0024] In the related art, for an ultrasonic welding device used for wire welding, usually the welding head and the bottom mold need to cooperate with each other for welding. Among them, since the bottom mold needs to contact multiple wires for welding, at this time the bottom mold is easily worn, resulting in a reduction in the overall service life of the bottom film.

[0025] In view of this, the embodiments of the present application provide a bottom mold, aiming to solve the above problems.

[0026] Please refer to Figures 1-7 , the embodiments of the present application provide a bottom mold having intersecting first direction X and second direction Z, including a bracket 1 and a main body 2. The main body 2 is arranged on one side of the bracket 1 along the first direction X and is detachably connected to the bracket 1; the main body 2 includes a connecting part 21 and a first working part 22. The connecting part 21 is detachably connected to the bracket 1 along the first direction X, and the first working part 22 is arranged on one side of the connecting part 21 along the second direction Z, and the first working part 22 is connected to the connecting part 21.

[0027] In the embodiments of the present application, by setting the bracket 1 and the main body 2 to be detachably connected, it is realized that the bracket 1 and the main body 2 are of a split structure. Among them, the main body 2 includes a first working part 22 for welding work. After the first working part 22 is worn, the main body 2 can be separated from the bracket 1, and only by replacing the main body 2 can the bottom film continue to be used. Compared with the integral bottom mold, the service life of the bottom mold is effectively improved, and the cost is reduced.

[0028] Specifically, the bracket 1 of the embodiment of the present application is used to be fixed on the frame of the welding machine, and then the main body 2 is connected to the bracket 1. During specific welding, only the main body 2 contacts the wire and cooperates with the welding head for welding. Among them, the bracket 1 is only used to support and fix the main body 2. During use, the wear rate of the bracket 1 is relatively low compared to the main body 2. Therefore, the bottom mold is made into a split type. At this time, the bracket 1 can be recycled without replacement. In addition, the main body 2 is detachably connected to the bracket 1. At this time, when the working part of the main body 2 is worn during frequent welding operations and cannot be used continuously, the bottom mold can continue to be used by replacing the main body 2. Therefore, compared with the integral bottom mold, the bottom mold of the embodiment of the present application only needs to replace the vulnerable parts to realize the continuous use of the bottom mold, effectively extending the overall service life of the bottom mold and reducing the production cost.

[0029] It should be noted that due to the need to be applicable to the ultrasonic welding environment, the price of the bottom mold is relatively high. Frequent replacement of the bottom mold will result in a high production cost, which is not conducive to cost reduction and efficiency improvement. By setting the bottom mold as a split type and only replacing the main body 2, the loss of the bracket 1 part is effectively reduced, which is equivalent to extending the service life of the bottom mold and reducing the production cost.

[0030] It should also be noted that in the embodiment of the present application, the detachable connection between the main body 2 and the bracket 1 can specifically be that the main body 2 and the bracket 1 are locked and connected through the connecting piece 3. The connecting piece can be a bolt. Threaded holes are provided on the bracket 1, and the main body 2 can be locked on the bracket 1. Alternatively, it can also be a direct threaded connection between the main body 2 and the bracket 1. Among them, a protruding stud can be provided on the side of the main body 2 facing the bracket 1, and a fixing hole is provided on the bracket 1. The main body 2 is directly screwed onto the bracket. Correspondingly, the fixing hole on the bracket 1 runs through in the second direction Z and the third direction Y, and the working part is adjusted by flipping the bottom mold as a whole. This scheme is not shown in the drawings. Or it can also be that a protruding positioning pin is provided on the side of the main body 2 facing the bracket 1, and a fixing hole is provided on the bracket 1. The positioning pin is inserted into the positioning hole. Among them, the positioning pin and the positioning hole can be rectangular parallelepiped-shaped for mutual limiting; the positioning hole and the positioning pin extend along the first direction X. An adjusting hole is provided at one end of the bracket 1 close to the main body 2. The adjusting hole runs through the bracket 1 in the second direction Z and communicates with the positioning hole. Then, an adjusting bolt is screwed into the positioning hole. By tightening the adjusting bolt against the positioning pin, the locking of the main body 2 and the bracket can be achieved. By loosening the adjusting bolt, the positioning pin can be released to facilitate the disassembly of the main body 2. This scheme is not shown in the drawings.

[0031] Such as Figure 12As shown in the figure, specifically, when the bottom mold of the present application is applied, it needs to be assembled to the frame of the ultrasonic welding equipment and slidably connected with the bottom mold arm 5. The bottom mold arm 5 is used to support the bottom mold and guide and limit the bottom mold. At the same time, the bottom mold cooperates with the wire gathering block 6 to gather and squeeze the wire. And the bottom mold arm 5 and the bottom mold together squeeze the gathered wire along the second direction Z towards the welding head 4 and perform ultrasonic welding. After the ultrasonic welding is completed, the bottom mold, the bottom mold arm 5 and the wire gathering block 6 reset respectively and wait for the next welding.

[0032] Please refer to Figure 3 、 Figures 6-9 In some embodiments, the main body 2 includes two first working parts 22. The two first working parts 22 are arranged on both sides of the connecting part 21 along the second direction Z, and both of the two first working parts 22 are connected to the connecting part 21.

[0033] In the embodiments of the present application, by providing two first working parts 22 arranged oppositely along the second direction Z, that is, the height direction, the two first working parts 22 can work in relay, thereby improving the service life of the main body 2, further improving the service life of the bottom mold, and further reducing the production cost.

[0034] Specifically, by providing two first working parts 22 arranged oppositely along the second direction Z, that is, the height direction, when one of the first working parts 22 is frequently worn out and loses its service life, the main body 2 can be disassembled and rotated so that the other first working part 22 is adjusted to face the welding head 4, and then the main body 2 is connected to the bracket 1. In this way, it can continue to be used, thereby further extending the service life of the main body 2.

[0035] Please refer to Figure 3 、 Figure 6 、 Figure 8 and Figure 9 In some embodiments, there is also a third direction Y intersecting with the first direction X and the second direction Z respectively. The main body 2 further includes two second working parts 23. The two second working parts 23 are arranged on both sides of the connecting part 21 along the third direction Y, and both of the two second working parts 23 are connected to the connecting part 21.

[0036] By providing two second working parts 23 in the present application, after the service life of one second working part 23 ends, the rotation angle of the main body 2 can be adjusted, the intact second working part 23 can be replaced to face the welding head 4, and the main body 2 is connected and fixed to the bracket 1. At this time, the main body 2 can continue to work, thereby further improving the service life of the main body 2 and reducing the production cost.

[0037] In the embodiment of the present application, two first working parts 22 and two second working parts 23 are arranged around the connecting part 21, thereby providing a plurality of working parts for the main body 2, thereby achieving that the service life of the main body 2 is multiplied according to the number of the working parts.

[0038] It should be noted that, if space permits, the main body 2 of the embodiment of the present application can include not only two first working parts 22 and two second working parts 23, but also a third working part, a fourth working part, etc. In this case, multiple working parts are arranged around the outer peripheral side of the connecting part 21. In this case, the main body 2 can include four or even more working parts, thereby further improving the service life of the main body 2.

[0039] It should also be noted that, in order to prevent the useless consumption such as wear on other adjacent working parts during the use of one of the working parts, it is preferred that: along the outer peripheral side of the connecting part 21, the working surfaces of the two adjacent working parts are spaced apart. Taking two first working parts 22 and two second working parts 23 as an example, at this time, the working surface of the first working part 22 and the working surfaces of the second working parts 23 on both sides thereof are spaced apart, and the working surface of the second working part 23 and the working surfaces of the first working parts 22 on both sides thereof are spaced apart. In this case, it can effectively avoid the wear on the adjacent working parts during the operation of one working part.

[0040] Please refer to Figure 8 and Figure 9 In some embodiments, the first working portion 22 has a first groove 221, which is arranged on a side of the first working portion 22 away from the connecting portion 21 along the second direction Z; the second working portion 23 has a second groove 231, which is arranged on a side of the second working portion 23 away from the connecting portion 21 along the third direction Y; the first groove 221 and the second groove 231 both extend along the first direction X.

[0041] In the embodiment of the present application, by providing the first groove 221 and the second groove 231, the first working part 22 and the second working part 23 can cooperate with the corresponding slide grooves on the bottom mold arm 5 on the frame of the ultrasonic welding equipment during operation to achieve mutual limiting guidance, effectively reducing the possibility of directional deviation of the bottom mold during movement. In addition, by providing the grooves, the friction force on the surface of the working part can be increased, thereby reducing the position deviation of the bottom mold along the third direction Y.

[0042] Please continue to refer to Figure 8 and Figure 9In some embodiments, the first working portion 22 has a plurality of first grooves 221, the plurality of first grooves 221 are arranged on a side of the first working portion 22 away from the connecting portion 21 along the second direction Z, and the plurality of first grooves 221 are arranged at intervals along the third direction Y; the second working portion 23 has a plurality of second grooves 231, the plurality of second grooves 231 are arranged on a side of the second working portion 23 away from the connecting portion 21 along the third direction Y, and the plurality of second grooves 231 are arranged at intervals along the second direction Z.

[0043] In the embodiment of the present application, multiple first grooves 221 and multiple second grooves 231 are provided to further improve the guiding and limiting effect. At the same time, the first grooves 221 and the second grooves 231 can be provided to be relatively shallow, which is equivalent to anti-slip stripes, can play an anti-slip effect, and can provide a larger contact surface. When the wires are welded, there can be more and relatively uniformly dispersed local contacts with the wires, thereby ensuring the welding effect.

[0044] Please refer to Figure 7 , Figure 9 and Figure 11 In some embodiments, the distance between the two first working portions 22 on one side away from the connecting portion 21 is greater than the size of the bracket 1 along the second direction Z, and the minimum distance between the two second working portions 23 on one side away from the connecting portion 21 is greater than the size of the bracket 1 along the second direction Z.

[0045] In the embodiment of the present application, by setting the minimum dimension between the two working parts to be larger than the dimension of the bracket 1 along the second direction Z, that is, the height direction, the working surface of the working part exceeds the two side surfaces of the bracket 1. In this way, when the bottom mold moves along the first direction X to crimp and weld multiple wires, the bracket 1 can avoid interfering with the movement of the bottom mold.

[0046] Specifically, if the size of the bracket 1 along the second direction Z is greater than the minimum distance between the working surfaces of the two working parts relatively set, the side of the bracket 1 facing the main body 2 will block one side of the groove. At this time, the distance moved by the bottom film will stop when the bracket 1 moves to abut against the corresponding bottom mold arm 5.

[0047] Please refer to Figure 5 , Figure 6 , Figure 8 and Figure 9 In some embodiments, the connecting portion 21 has a first through hole 211, which penetrates the connecting portion 21 along the first direction X; the bracket 1 has a first fixing hole 11, which penetrates the side of the bracket 1 facing the connecting portion 21 along the first direction X; the bottom mold includes a connecting member 3, which is detachably inserted into the first through hole 211 and the first fixing hole 11, so that the connecting portion 21 is detachably connected to the bracket 1.

[0048] In the embodiment of the present application, the connecting portion 21 is matched with the first fixing hole 11 of the bracket 1 through the first through hole 211. At this time, the connecting member 3 is sequentially inserted into the first through hole 211 and the first fixing hole 11 and locked, so as to realize the connection between the bracket 1 and the main body 2. Removing the connecting member 3 can realize the disassembly of the main body 2 and the bracket 1, so as to separate the bracket 1 and the main body 2 from each other and realize the replaceability of the main body 2.

[0049] Please refer to Figure 5 , Figure 6 , Figure 8 In some embodiments, the first through hole 211 is a stepped hole, and one end of the connecting member 3 away from the bracket 1 along the first direction X is arranged in the first through hole 211.

[0050] In the embodiment of the present application, the first through hole 211 is a stepped hole, which can realize sinking the connecting member 3 in the first through hole 211. At this time, the connecting member 3 can be a countersunk head bolt, so as to prevent the connecting member 3 from protruding from the first through hole 211, thereby avoiding the influence of the connecting member 3 on the moving range of the main body 2, realizing that the main body 2 can reach the expected position for welding, and avoiding missing welding.

[0051] Please refer to Figure 2 , Figure 5 , Figures 8-11 In some embodiments, the bracket 1 includes a fixing portion 12 and a positioning portion 13. The positioning portion 13 is arranged on one side of the fixing portion 12 facing the connecting portion 21 along the first direction X. The positioning portion 13 is connected to the fixing portion 12. The first fixing hole 11 penetrates through one side of the fixing portion 12 facing the positioning portion 13 and the positioning portion 13; the connecting portion 21 has a positioning groove 212, and the positioning groove 212 is arranged on one side of the connecting portion 21 facing the bracket 1. The first through hole 211 penetrates through the bottom wall of the positioning groove 212 along the first direction X and communicates with the positioning groove 212; the positioning portion 13 is detachably inserted into the positioning groove 212.

[0052] In the embodiment of the present application, by setting the positioning portion 13 and the positioning groove 212 to cooperate with each other, an effective limiting effect can be achieved when the bracket 1 is connected to the main body 2, preventing torsion between the main body 2 and the bracket 1, and ensuring that the working surface of the first working portion 22 or the second working portion 23 is parallel to the welding surface of the welding head 4, so as to achieve a better welding effect.

[0053] It should be noted that in the embodiment of the present application, the positioning portion 13 and the positioning groove 212 can be angular structures such as triangles, squares, rectangles, squares, trapezoids, and stars. At this time, mutual limitation can be formed between the outer peripheral surface of the positioning portion 13 and the inner side wall of the positioning groove 212, so as to realize anti-torsion of the main body 2.

[0054] Please refer toFigure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 10 , in some embodiments, the fixing portion 12 has a second through hole 121 and a third through hole 122. Both the second through hole 121 and the third through hole 122 penetrate the fixing portion 12 along the second direction Z, and the second through hole 121 and the third through hole 122 are arranged at intervals along the first direction X.

[0055] In the embodiments of the present application, by providing the third through hole 122, the bracket 1 can be fixed on the driving belt of the ultrasonic welding equipment by means of connection structures such as screws and bolts. At this time, an external positioning piece can be used to cooperate with the bracket to clamp the belt between the bracket and the positioning piece, so as to realize the installation and fixation of the bottom die. When the bottom die is welded, the bottom die can be driven by the belt to move along the first direction X, so that the main body of the bottom die is pressed against the wire harness along the second direction Z to release the wire harness. Among them, the second through hole 121 is used to avoid other protruding structures on the frame when the bottom die moves towards the welding head 4 to press the wire harness during welding, so as to avoid interference with the welding of the bottom die, and thus realize the smooth pressing of the bottom die in place.

[0056] Please refer to Figure 5 and Figure 11 , in some embodiments, the fixing portion 12 has a second fixing hole 123, and the second fixing hole 123 penetrates the side of the fixing portion 12 away from the connecting portion 21 along the first direction X; along the first direction X, the second fixing hole 123 is arranged on the side of the third through hole 122 away from the second through hole 121.

[0057] In the embodiments of the present application, the second fixing hole 123 is used to place a buffer member, and the buffer member can be a spring, which can prevent the bottom die from directly and rigidly contacting the frame when the bottom die is reset, resulting in damage to both the frame and the bottom die, and ensure the service life of the bottom die.

[0058] Correspondingly, an ultrasonic welding equipment according to an embodiment of the present application includes a bottom die as described in any one of the foregoing embodiments.

[0059] The ultrasonic welding device according to the embodiment of the present application can be mainly used for wire welding. Specifically, the ultrasonic welding device includes a welding head 4, a bottom mold, a wire gathering block 6 and a bottom mold arm 5. When ultrasonic welding a wire harness, first place the wire harness in the welding area surrounded by the welding head 4, the wire gathering block 6 and the bottom mold arm 5. Then, the bottom mold extends to the side of the wire harness away from the welding head 4. Then, move the bottom mold arm 5 and the bottom mold so that the bottom mold presses the wire harness towards the welding head 4. At this time, ultrasonic welding of the wire harness can be performed. After welding is completed, first raise the bottom mold and the bottom mold arm 5, and then the bottom mold and the wire gathering block 6 retract and reset, and the wire harness is removed to complete the welding. Among them, due to frequent welding, the working part of the bottom mold is worn. At this time, by removing the main body 2 of the bottom mold, the main body 2 can be replaced. At the same time, multiple working parts are provided on the main body, and the unworn working parts on the main body 2 can be rotated and switched to continue working, which can effectively save the cost of the bottom mold and extend the working life of the bottom mold.

[0060] In the above embodiments, the descriptions of the respective embodiments have their own emphases. For parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0061] The above has introduced in detail a bottom mold and an ultrasonic welding device provided by the embodiments of the present application, and specific examples have been used to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of the present application; those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A bottom mold, characterized in that, Having a first direction (X) and a second direction (Z) intersecting, comprising: Bracket (1), A main body (2) is arranged on one side of the bracket (1) along the first direction (X) and is detachably connected to the bracket (1); the main body (2) comprises a connecting portion (21) and a first working portion (22); the connecting portion (21) is detachably connected to the bracket (1) along the first direction (X); the first working portion (22) is arranged on one side of the connecting portion (21) along the second direction (Z), and the first working portion (22) is connected to the connecting portion (21).

2. The bottom mold according to claim 1, characterized in that, The main body (2) comprises two first working parts (22), the two first working parts (22) are arranged on both sides of the connecting part (21) along the second direction (Z), and the two first working parts (22) are connected to the connecting part (21).

3. The bottom mold according to claim 2, characterized in that, It also has a third direction (Y) intersecting with the first direction (X) and the second direction (Z) respectively, and the main body (2) also includes two second working parts (23), the two second working parts (23) are arranged on both sides of the connecting part (21) along the third direction (Y), and the two second working parts (23) are connected to the connecting part (21).

4. The bottom mold according to claim 3, characterized in that, The first working portion (22) has a first groove (221), and the first groove (221) is arranged on a side of the first working portion (22) away from the connecting portion (21) along the second direction (Z); the second working portion (23) has a second groove (231), and the second groove (231) is arranged on a side of the second working portion (23) away from the connecting portion (21) along the third direction (Y); the first groove (221) and the second groove (231) both extend along the first direction (X).

5. The bottom mold according to claim 4, characterized in that, The first working part (22) has a plurality of first grooves (221), the plurality of first grooves (221) are arranged on a side of the first working part (22) away from the connecting part (21) along the second direction (Z), and the plurality of first grooves (221) are arranged at intervals along the third direction (Y); the second working part (23) has a plurality of second grooves (231), the plurality of second grooves (231) are arranged on a side of the second working part (23) away from the connecting part (21) along the third direction (Y), and the plurality of second grooves (231) are arranged at intervals along the second direction (Z).

6. The bottom mold according to claim 3, characterized in that, The distance between the two first working parts (22) on one side facing away from the connecting part (21) is greater than the dimension of the bracket (1) along the second direction (Z), and the minimum distance between the two second working parts (23) on one side facing away from the connecting part (21) is greater than the dimension of the bracket (1) along the second direction (Z).

7. The bottom mold according to claim 1, characterized in that, The connecting part (21) has a first through hole (211), and the first through hole (211) penetrates through the connecting part (21) along the first direction (X); the bracket (1) has a first fixing hole (11), and the first fixing hole (11) penetrates through one side of the bracket (1) facing the connecting part (21) along the first direction (X); the bottom mold includes a connecting piece (3), and the connecting piece (3) is detachably inserted through the first through hole (211) and the first fixing hole (11) to detachably connect the connecting part (21) and the bracket (1).

8. The bottom mold according to claim 7, characterized in that The first through hole (211) is a stepped hole, and one end of the connecting piece (3) away from the bracket (1) along the first direction (X) is arranged in the first through hole (211).

9. The bottom mold according to claim 7, wherein The bracket (1) includes a fixing part (12) and a positioning part (13), the positioning part (13) is arranged on one side of the fixing part (12) facing the connecting part (21) along the first direction (X), the positioning part (13) is connected to the fixing part (12), and the first fixing hole (11) penetrates through one side of the fixing part (12) facing the positioning part (13) and the positioning part (13); The connecting part (21) has a positioning groove (212), the positioning groove (212) is arranged on one side of the connecting part (21) facing the bracket (1), the first through hole (211) penetrates through the bottom wall of the positioning groove (212) along the first direction (X) and communicates with the positioning groove (212); the positioning part (13) is detachably inserted into the positioning groove (212).

10. The bottom mold according to claim 9, characterized in that, The fixing part (12) has a second through hole (121) and a third through hole (122), both the second through hole (121) and the third through hole (122) penetrate through the fixing part (12) along the second direction (Z), and the second through hole (121) and the third through hole (122) are arranged at intervals along the first direction (X).

11. The bottom mold according to claim 10, characterized in that, The fixing part (12) has a second fixing hole (123), the second fixing hole (123) penetrates through one side of the fixing part (12) away from the connecting part (21) along the first direction (X); along the first direction (X), the second fixing hole (123) is arranged on one side of the third through hole (122) away from the second through hole (121).

12. An ultrasonic welding device, characterized in that, Including the bottom mold according to any one of claims 1-11.

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