Transistor pin shearing machine

Abstract

The utility model provides a transistor pin shearing machine. The transistor pin shearing machine comprises a base; the mounting seat is arranged on the base, a cavity penetrating to the base is formed in the mounting seat, and an opening of the cavity is located in the side, away from the base, of the mounting seat; the foot positioning mechanism extends into the cavity from one outer side wall of the mounting seat, and the foot positioning mechanism is provided with a plurality of guide holes with adjustable intervals; the shearing mechanism is arranged between the foot positioning mechanism and the base, a part of the shearing mechanism extends out of the outer side wall of the mounting seat, and a shearing part of the shearing mechanism directly faces the guide hole; and the device placing table is matched with the inner side wall of the cavity to form an object placing groove for placing a transistor, the device placing table is provided with a through hole penetrating into the mounting seat, and the transistor is aligned with the guide hole and the shearing part through the through hole. The pins are positioned through the guide holes, and meanwhile the pins are prevented from being extruded to deform in the shearing process.

Description

Technical Field

[0001] The utility model relates to the field of production and application of semiconductor devices, in particular to a transistor shearing machine. Background Art

[0002] During the use of MOS tubes, due to inconsistent pin lengths, the pins need to be shortened to obtain MOS tubes of required length specifications. In addition, the pins of MOS tubes are sometimes bent according to requirements. For this purpose, a corresponding MOS tube pin cutting machine is required to complete the above operations. However, the existing pin cutting machines are prone to squeeze the pins and cause deformation when cutting the pins. Utility Model Content

[0003] In view of the above problems existing in the prior art, the utility model proposes a transistor shearing machine, which mainly solves the problem that the existing pin shearing machines are prone to squeeze the pins and cause deformation.

[0004] In order to achieve the above-mentioned purpose and other purposes, the technical solution adopted by the utility model is as follows.

[0005] The present application provides a transistor foot cutting machine, comprising: a base; a mounting seat, which is arranged on the base, and the mounting seat is provided with a cavity that passes through to the base, and the opening of the cavity is located on the side of the mounting seat away from the base; a foot positioning mechanism, which extends from one of the outer walls of the mounting seat into the cavity, and the foot positioning mechanism provides a plurality of guide holes with adjustable spacing from each other; a shearing mechanism, which is arranged between the foot positioning mechanism and the base and partially extends out of the outer wall of the mounting seat, and the shearing portion of the shearing mechanism faces the guide hole; a device placement table, which cooperates with the inner wall of the cavity to form a placement groove for placing transistors, and the device placement table is provided with a through hole that passes through the interior of the mounting seat, and the transistor is aligned with the guide hole and the shearing portion through the through hole.

[0006] In one embodiment of the present application, the foot positioning mechanism includes: a side frame, which is fixedly connected to the outer side wall of the mounting seat, and the side frame is provided with a horizontal slide groove parallel to the plane of the base; a plurality of positioning rods, which pass through the horizontal slide groove and extend into the cavity, and the positioning rods slide in the horizontal slide groove to adjust the spacing between the positioning rods; the portion of each positioning rod extending into the cavity is provided with the guide hole.

[0007] In one embodiment of the present application, a limiting block is provided at least at one end of the positioning rod, the limiting block abuts against the side frame and cooperates with the limiting block via bolts to clamp the side frame, so that the positioning rod is fixedly connected to the side frame.

[0008] In an embodiment of the present application, the shearing mechanism includes: a first shearing block extending from an outer sidewall of the mounting base into the cavity; a second shearing block extending from the other outer sidewall of the mounting base into the cavity, and the first shearing block and the second shearing block are oppositely arranged; a combined blade respectively disposed on the sides opposite to the first shearing block and the second shearing block, and by the first shearing block and the second shearing block approaching or separating from each other, the combined blade performs a pin-shearing action; a spring-back assembly respectively abutting against the first shearing block and the second shearing block to, after releasing the first shearing block and the second shearing block, make the first shearing block and the second shearing block spring back to a preset position.

[0009] In an embodiment of the present application, a first inclined surface and a second inclined surface are respectively disposed on the sides of the first shearing block and the second shearing block opposite to each other, and the width of the region between the first inclined surface and the second inclined surface gradually increases in the direction approaching the innermost sidewall of the closest mounting base;

[0010] The spring-back assembly includes a first pulley, a second pulley, a support frame, a spring column and a spring. The first pulley and the second pulley are respectively sleeved on the support frame and respectively abut against the first inclined surface and the second inclined surface; the spring column is fixedly connected to the support frame, and the axis of the spring column is perpendicular to the plane where the support frame is located; the spring is sleeved on the spring column, the spring column penetrates through the sidewall of the mounting base, and abuts against the inner side of the corresponding sidewall through the spring.

[0011] In an embodiment of the present application, a height adjustment rod is further disposed on the device placement table. The height adjustment rod penetrates through the device placement table and is rotatably connected to the support table in the cavity. By rotating the height adjustment rod, the device placement table approaches or moves away from the pin positioning mechanism.

[0012] In an embodiment of the present application, a convex block is disposed on the circumference of the device placement table, and the device placement table is embedded in the cavity by the cooperation of the convex block and the groove in the cavity.

[0013] In an embodiment of the present application, sliding strips are respectively disposed on the sides of the first shearing block and the second shearing block facing the base, and the sliding strips cooperate with the sliding grooves on the sidewall of the mounting base, so that the first shearing block or the second shearing block slides along the extending direction of the sliding strip.

[0014] In an embodiment of the present application, a blocking strip is disposed on the side of the sliding strip close to the combined blade. When the first shearing block and the second shearing block spring back, the blocking strip abuts against the sliding groove to limit the spring-back limit position of the first shearing block and the second shearing block.

[0015] In an embodiment of the present application, a waste box is provided inside the base, and the waste box is facing the shearing mechanism, so that the feet cut by the shearing mechanism fall into the waste box.

[0016] As described above, a transistor leg cutting machine proposed by the present application has the following beneficial effects.

[0017] In the present application, a leg positioning mechanism is provided inside the mounting seat. The leg positioning mechanism is provided with guiding holes with adjustable distances. By adjusting the distance between the guiding holes, the shearing and positioning requirements of different transistor legs can be adapted. The legs of the transistor directly pass through the placing groove and the guiding holes and then extend to the position of the shearing mechanism. The shearing action is performed by the shearing structure. The guiding holes can prevent the legs from being squeezed and bent during the shearing process, resulting in waste. The structure is simple and the operation is convenient. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of a transistor leg cutting machine in an embodiment of the present application.

[0019] Figure 2 It is a schematic structural diagram of a positioning rod in an embodiment of the present application.

[0020] Figure 3 It is a schematic three-dimensional structural diagram of a shearing mechanism in an embodiment of the present application.

[0021] Figure 4 It is a schematic bottom structural diagram of a transistor cutting machine in an embodiment of the present application.

[0022] Figure 5 It is a schematic cross-sectional structural diagram of a transistor cutting machine in an embodiment of the present application.

[0023] Figure 6 It is a schematic three-dimensional structural diagram of a device placing table in an embodiment of the present application.

[0024] Explanation of the Reference Numerals in the Drawings:

[0025] 1 - Mounting seat; 101 - Placing groove; 102 - Vertical sliding groove; 103 - Support table; 104 - Leg positioning mechanism; 105 - Side hole; 106 - Shearing block bottom plate; 107 - Sliding groove; 2 - Base; 201 - Waste box; 3 - Device placing table; 301 - Through hole; 302 - Protrusion; 303 - Height adjusting rod; 304 - Anti-slip sleeve; 4 - Positioning rod; 401 - Guiding hole; 402 - Limiting block; 403 - Bolt; 5 - Shearing mechanism; 501 - Combined blade; 502 - First pulley; 503 - Support frame; 504 - Spring; 505 - Spring column; 506 - Sliding bar; 507 - Second pulley; 508 - First shearing block; 509 - Second shearing block. Detailed Embodiments

[0026] The following specific examples illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The present utility model can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0027] It should be noted that the drawings provided in the following embodiments only schematically illustrate the basic concept of the present utility model. Therefore, only the components related to the present utility model are shown in the drawings, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and proportion of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0028] Please refer to Figure 1 , Figure 1The schematic diagram of the structure of a transistor pin cutting machine in an embodiment of the present application. The transistor pin cutting machine in the embodiment of the present application comprises: a base 2; a mounting seat 1, which is arranged on the base 2, and the mounting seat 1 is provided with a cavity penetrating to the base 2, and the opening of the cavity is located on the side of the mounting seat 1 away from the base 2; a foot positioning mechanism 104, which extends from one of the outer walls of the mounting seat 1 into the cavity, and the foot positioning mechanism 104 provides a plurality of guide holes 401 with adjustable spacing from each other; a shearing mechanism 5, which is arranged between the foot positioning mechanism 104 and the base 2, and partially extends out of the outer wall of the mounting seat 1, and the shearing part of the shearing mechanism 5 is opposite to the guide hole 401; and a device placement platform 3, which cooperates with the inner wall of the cavity to form a placement groove 101 for placing transistors, and the device placement platform 3 is provided with a through hole 301 penetrating to the inside of the mounting seat 1, and the transistor is aligned with the guide hole 401 and the shearing part through the through hole 301. Specifically, the base 2 can be set as a rectangular frame, a polygonal frame or a circular frame. The specific shape of the base 2 can be set and adjusted according to actual application requirements, and is not limited here. The mounting seat 1 can be fixedly connected to the base 2, and the mounting seat 1 can also be integrally formed with the base 2. The mounting seat 1 can adopt a rectangular tube with a hollow middle, and of course it can also be set to other shapes according to requirements. The interior of the mounting seat 1 is hollowed out to form a cavity, which can be connected to the base 2. A foot positioning mechanism 104 can be installed on the side wall of the mounting seat 1, and the foot positioning mechanism 104 extends from the outer side wall of the mounting seat 1 to the cavity of the mounting seat 1. The part of the foot positioning mechanism 104 extending into the cavity is provided with a guide hole 401. There are multiple guide holes 401, and multiple guide holes 401 can be arranged side by side. A shearing mechanism 5 can also be arranged between the foot positioning mechanism 104 and the base 2, and the shearing part of the shearing mechanism 5 is opposite to the area where the guide hole 401 is located. The pin of the transistor passes through the guide hole 401 and extends to the corresponding position of the shearing part. By applying external force to the shearing mechanism 5, the shearing part performs a shearing action. The device placement platform 3 is arranged on the side of the mounting seat 1 away from the base 2. After the device placement platform 3 is placed in the cavity of the mounting seat 1, the device placement platform 3 and the inner wall of the cavity form a storage groove 101. A through hole 301 is opened on the device placement platform 3. After the transistor is placed on the device placement platform 3, the pins of the transistor pass through the through hole 301 and the guide hole 401 in sequence and then extend to the corresponding position of the shearing part. The device placement platform 3 can play a role in supporting the parts other than the pins of the transistor. The position of the device placement platform 3 in the cavity can be set or adjusted according to the length of the transistor pins or the length of the pins to be sheared, which is not limited here.

[0029] In one embodiment, the foot positioning mechanism 104 includes: a side frame fixedly connected to the outer sidewall of the mounting base 1, and a horizontal sliding groove parallel to the plane where the base 2 is located is provided on the side frame; a plurality of positioning rods 4 passing through the horizontal sliding groove and extending into the cavity, and the positioning rods 4 slide in the horizontal sliding groove to adjust the distance between the positioning rods 4; a guiding hole 401 is provided on the part of each positioning rod 4 extending into the cavity. Specifically, the side frame can be fixed to the sidewall of the mounting base 1 by screws or other fasteners, or can be fixedly connected to the mounting base 1 by a partially embedded method, and the specific installation method can be selected and adjusted according to actual application requirements. The side frame is provided with a horizontal sliding groove on the outer plane parallel to the outer sidewall of the mounting base 1. A positioning groove is also provided in the area of the outer sidewall of the mounting base 1 opposite to the horizontal sliding groove, and a plurality of positioning rods 4 pass through the horizontal sliding groove and extend into the cavity of the mounting base 1 through the positioning groove.

[0030] Please refer to Figure 2 , Figure 2 which is a schematic structural diagram of the positioning rod 4 in an embodiment of the present application. In one embodiment, at least one end of the positioning rod 4 is provided with a limiting block 402, and the limiting block 402 abuts against the side frame and cooperates with the limiting block 402 through a bolt 403 to clamp the side frame, so that the positioning rod 4 is fixedly connected to the side frame. Specifically, the positioning rod 4 can be fixed through the horizontal sliding groove. The limiting block 402 at one end of the positioning rod 4 abuts against the position of the horizontal sliding groove on the inner sidewall of the side frame. A threaded hole is provided on the limiting block 402, and the bolt 403 can pass through the horizontal sliding groove and be connected to the threaded hole. The nut of the bolt 403 abuts against the outer sidewall of the side frame, and then cooperates with the limiting block 402 to clamp the frame body of the side frame, achieving the effect of fixing the positioning rod 4. When the position of the positioning rod 4 needs to be adjusted, the bolt 403 can be loosened, and after the positioning rod 4 is slid to the required position, the bolt 403 is tightened to fix the positioning rod 4. The plurality of positioning rods 4 are all fixed in the same way. Since the guiding hole 401 is provided on the part of the positioning rod 4 extending into the cavity, the distance between the positioning rods 4 can be adjusted according to the pin pitch of the transistor to be sheared, so that after the transistor is placed on the device placement table 3, the transistor pins just pass through the corresponding guiding holes 401. In another embodiment, the part of the positioning rod 4 extending out of the horizontal sliding groove can also be provided with a threaded structure, and a nut is sleeved on the threaded structure, and then cooperates with the limiting block 402 to fix the position of the positioning rod 4 on the side frame. Of course, other methods can also be used to achieve the fixed and loose positioning of the positioning rod 4, which is not limited here.

[0031] Please refer to Figure 3 , Figure 3This is a schematic perspective view of the shearing mechanism 5 in an embodiment of the present application. In one embodiment, the shearing mechanism 5 includes: a first shearing block 508 extending from an outer sidewall of the mounting base 1 into the cavity; a second shearing block 509 extending from the other outer sidewall of the mounting base 1 into the cavity, and the first shearing block 508 and the second shearing block 509 are oppositely arranged; a combined blade 501 disposed on the sides opposite to the first shearing block 508 and the second shearing block 509 respectively, and by the first shearing block 508 and the second shearing block 509 approaching or separating from each other, the combined blade 501 performs a lead trimming action; a resilient component respectively abutting against the first shearing block 508 and the second shearing block 509 to cause the first shearing block 508 and the second shearing block 509 to rebound to a preset position after releasing the first shearing block 508 and the second shearing block 509. Specifically, the first shearing block 508 and the second shearing block 509 are disposed on two sidewalls opposite to the mounting base 1 and are located between the lead positioning mechanism 104 and the base 2. Both the first shearing block 508 and the second shearing block 509 can partially expose the mounting base 1, and the portions of the first shearing block 508 and the second shearing block 509 in the cavity can slide relative to each other, so that the combined blade 501 of the shearing portion closes or separates to achieve a shearing action. Blade groups are respectively disposed on the opposite side surfaces of the first shearing block 508 and the second shearing block 509, and the blade groups on both sides cooperate to complete the shearing action. When no external force is applied, the combined blades 501 are separated from each other, and by squeezing the exposed portions of the first shearing block 508 and the second shearing block 509, the combined blades 501 are closed for shearing. After the external force is released, the first shearing block 508 and the second shearing block 509 automatically rebound to the preset position in the case where no external force is applied under the action of the resilient component.

[0032] In one embodiment, a first inclined surface and a second inclined surface are respectively provided on the sides of the first shearing block 508 and the second shearing block 509 facing each other, and the width of the area between the first inclined surface and the second inclined surface gradually increases in the direction close to the inner side wall of the nearest mounting seat 1; the rebounding assembly includes a first pulley 502, a second pulley 507, a support frame 503, a spring column 505 and a spring 504. The first pulley 502 and the second pulley 507 are respectively sleeved on the support frame 503 and respectively abut against the first inclined surface and the second inclined surface; the spring column 505 is fixedly connected to the support frame 503, and the axis of the spring column 505 is perpendicular to the plane where the support frame 503 is located; the spring 504 is sleeved on the spring column 505, and the spring column 505 penetrates through the side wall of the mounting seat 1 and abuts against the inner side of the corresponding side wall through the spring 504. Specifically, the support frame 503 can be a rigid structure such as a rectangular frame or an oval frame. The first pulley 502 and the second pulley 507 are respectively located on opposite sides of the support frame 503. The spring column 505 is arranged perpendicular to the plane where the support frame 503 is located and partially extends out of the mounting seat 1. The spring 504 is sleeved on the spring column 505. When the spring 504 is stressed, it abuts against the support frame 503 and the side wall of the mounting seat 1 respectively. After the external force is released, the spring 504 automatically rebounds to its original position, and then the pulleys on the two shearing blocks squeeze the shearing blocks, so that the first shearing block 508 and the second shearing block 509 are separated and rebound to a preset position.

[0033] In one embodiment, sliding strips 506 are respectively provided on the sides of the first shearing block 508 and the second shearing block 509 facing the base 2, and the sliding strips 506 cooperate with the sliding grooves 107 on the side wall of the mounting seat 1, so that the first shearing block 508 or the second shearing block 509 slides along the extending direction of the sliding strips 506. Specifically, the sliding strips 506 can be provided as one or more. By sliding the sliding strips 506 in the sliding grooves 107, the first shearing block 508 and the second shearing block 509 approach or move away from each other.

[0034] In one embodiment, side holes 105 are opened on opposite sides of the mounting seat 1, and sliding grooves 107 are opened on the sides of the side holes 105 close to the base 2. The first shearing block 508 and the second shearing block 509 are embedded in the side holes 105 and then cooperate with the sliding grooves 107 at the corresponding positions of the side holes 105.

[0035] Please refer to Figure 4 , Figure 4This is a schematic diagram of the bottom structure of a transistor shearing machine in an embodiment of the present application. In one embodiment, a blocking bar is provided on one side of the sliding bar 506 close to the combined blade 501. When the first shearing block 508 and the second shearing block 509 rebound, the blocking bar abuts against the sliding groove 107 to limit the rebound limit position of the first shearing block 508 and the second shearing block 509. When the first shearing block 508 and the second shearing block 509 are in a preset position, the blocking bar can abut against the side wall of the mounting seat 1 to prevent the first shearing block 508 and the second shearing block 509 from popping out of the mounting seat 1 during the rebound process. The blocking bar and the sliding bar 506 can form a "T" - shaped structure. Of course, it can also be set to other shapes according to requirements, as long as it can prevent the shearing block from popping out of the mounting seat 1, and there is no limitation here.

[0036] In one embodiment, a shearing - block bottom plate 106 can be arranged in the cavity. The shearing - block bottom plate 106 is used to support the first shearing block 508 and the second shearing block 509, and the first shearing block 508 and the second shearing block 509 can move relative to each other on the shearing - block bottom plate 106. A sliding groove 107 is opened on the shearing - block bottom plate 106, and the sliding groove 107 communicates with the sliding groove 107 on the side wall of the mounting seat 1, restricting the blocking bar and the sliding bar 506 within the sliding groove 107 of the shearing - block bottom plate 106.

[0037] Please refer to Figure 5 and Figure 6 , Figure 5 This is a schematic cross - sectional structure diagram of a transistor shearing machine in an embodiment of the present application. Figure 6 This is a three - dimensional structure diagram of the device placement table 3 in an embodiment of the present application. In one embodiment, a height - adjusting rod 303 is further arranged on the device placement table 3. The height - adjusting rod 303 penetrates through the device placement table 3 and is rotatably connected to the support table 103 in the cavity. By rotating the height - adjusting rod 303, the device placement table 3 can be moved closer to or farther away from the foot - positioning mechanism 104. Specifically, a plurality of vertical sliding grooves 102 can be opened on the inner wall of the mounting seat 1, and convex blocks 302 are arranged on the circumference of the device placement table 3. When the device placement table 3 is placed into the cavity, the convex blocks 302 can be embedded into the vertical sliding grooves 102, so that the device placement table 3 can slide along the vertical sliding grooves 102 to adjust the height of the device placement table 3 relative to the base 2. Further, a support table 103 can be arranged in the cavity. The height - adjusting rod 303 passes through the device placement table 3 and abuts against the support table 103. The height - adjusting rod 303 is connected to the device placement table 3 through a threaded structure. By rotating the end of the height - adjusting rod 303 away from the support table 103, the device placement table 3 can be driven to slide along the vertical sliding grooves 102 to adjust the height.

[0038] In one embodiment, an anti-slip sleeve 304 can be sleeved on one end of the height adjustment rod 303 away from the support platform 103 to increase the resistance when rotating the height adjustment rod 303, facilitating the rotation operation. The height adjustment rod 303 can be provided in multiple numbers, and can be specifically set and adjusted according to actual application requirements, which is not limited here.

[0039] In one embodiment, a waste box 201 is provided in the base 2. The waste box 201 faces the shearing mechanism 5, so that the feet cut by the shearing mechanism 5 fall into the waste box 201. The waste box 201 can be provided on the base 2. The waste box 201 can adopt a drawer structure. When it is necessary to clean the waste, the waste box 201 can be pulled out. The waste box 201 faces the cavity of the mounting seat 1. An opening is provided in the docking area between the cavity and the base 2, and this opening faces the position where the guide hole 401 is located. The sheared pins can directly fall into the waste box 201.

[0040] Based on the above technical solutions of the present application, the positions of the transistor pins can be located through the guide holes, and at the same time, the pins are prevented from being squeezed and deformed during the shearing process. The distance between the guide holes can be adjusted to meet the shearing requirements of devices with different pin spacings. The operation is simple and convenient; the height of the device placement table can be adjusted to meet the requirements of different pin shearing lengths, improving the applicability of the product.

[0041] The above embodiments merely illustrate the principles and effects of the present invention, rather than limiting the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A transistor leg cutting machine, characterized in that: include: Base; A mounting seat, which is arranged on the base, the mounting seat is provided with a cavity penetrating to the base, and the opening of the cavity is located on a side of the mounting seat away from the base; A foot positioning mechanism extending from one of the outer side walls of the mounting seat into the cavity, the foot positioning mechanism providing a plurality of guide holes with adjustable spacing between each other; A shearing mechanism, which is disposed between the foot positioning mechanism and the base and partially extends out of the outer side wall of the mounting seat, and a shearing portion of the shearing mechanism faces the guide hole; The device placement platform cooperates with the inner side wall of the cavity to form a placement groove for placing the transistor. The device placement platform is provided with a through hole that penetrates to the inside of the mounting seat, and the transistor is aligned with the guide hole and the shearing portion through the through hole.

2. The transistor leg cutting machine according to claim 1, characterized in that: The foot positioning mechanism comprises: A side frame, which is fixedly connected to the outer side wall of the mounting seat, and the side frame is provided with a horizontal slide groove parallel to the plane where the base is located; A plurality of positioning rods pass through the horizontal slide groove and extend into the cavity, and the positioning rods slide in the horizontal slide groove to adjust the spacing between the positioning rods; the portion of each positioning rod extending into the cavity is provided with the guide hole.

3. The transistor leg cutting machine according to claim 2, characterized in that: A limiting block is disposed at at least one end of the positioning rod, the limiting block abuts against the side frame and cooperates with the limiting block through bolts to clamp the side frame, so that the positioning rod is fixedly connected to the side frame.

4. The transistor leg cutting machine according to claim 1, characterized in that: The shearing mechanism comprises: A first shear block extending from an outer side wall of the mounting seat into the cavity; A second shear block extends from another outer side wall of the mounting seat into the cavity, and the first shear block is arranged opposite to the second shear block; Combined blades are respectively arranged on the sides opposite to the first shear block and the second shear block, and the combined blades perform a shearing action by the first shear block and the second shear block moving closer to or farther from each other; The rebound component abuts against the first shear block and the second shear block respectively, so as to make the first shear block and the second shear block rebound to a preset position after the first shear block and the second shear block are released.

5. The transistor leg cutting machine according to claim 4, characterized in that: A first inclined surface and a second inclined surface are respectively provided on the sides of the first shear block opposite to the second shear block, and the width of the area between the first inclined surface and the second inclined surface gradually increases in a direction approaching the inner side wall of the closest mounting seat; The rebound assembly includes a first pulley, a second pulley, a support frame, a spring column and a spring. The first pulley and the second pulley are respectively sleeved on the support frame and respectively abut against the first inclined surface and the second inclined surface; the spring column is fixedly connected to the support frame, and the axis of the spring column is perpendicular to the plane where the support frame is located; the spring is sleeved on the spring column, the spring column passes through the side wall of the mounting seat, and abuts against the inner side of the corresponding side wall through the spring.

6. The transistor leg cutting machine according to claim 1, characterized in that: The device placement platform is also provided with a height adjustment rod, which passes through the device placement platform and is rotatably connected to the support platform in the cavity. The device placement platform is moved closer to or away from the foot positioning mechanism by rotating the height adjustment rod.

7. The transistor leg cutting machine according to claim 1, characterized in that: The device placement platform is provided with a convex block on the circumference thereof, and the device placement platform is embedded in the cavity by the cooperation between the convex block and the groove in the cavity.

8. The transistor leg cutting machine according to claim 4, characterized in that: A sliding bar is respectively arranged on one side of the first shear block and the second shear block facing the base, and the sliding bar cooperates with the sliding groove on the side wall of the mounting seat so that the first shear block or the second shear block slides along the extending direction of the sliding bar.

9. The transistor leg cutting machine according to claim 8, characterized in that: A blocking bar is arranged on one side of the sliding bar close to the combined blade. When the first shear block and the second shear block rebound, the blocking bar abuts against the sliding groove to limit the rebound limit position of the first shear block and the second shear block.

10. The transistor leg cutting machine according to claim 1, characterized in that: A waste box is arranged in the base, and the waste box is directly opposite to the shearing mechanism, so that the legs cut off by the shearing mechanism fall into the waste box.

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