A U-shaped terminal riveting machine

Abstract

The present invention discloses a U-shaped terminal riveting machine, which includes: a frame; a feeding mechanism, which is arranged on the frame and is used to convey the U-shaped terminal; a mold clamping mechanism, which is arranged on the frame and includes a first mold base and a second mold base arranged relatively in a horizontal direction, and the second mold base can move closer to or away from the first mold base to rivet the U-shaped terminal conveyed by the feeding mechanism to the workpiece to be processed; a first driving mechanism, which is arranged on the frame and is used to drive the second mold base to move closer to or away from the first mold base within a fixed stroke; a second driving mechanism, which is arranged on the frame and is used to adjust the starting position of the second mold base relative to the first mold base. The U-shaped terminal riveting machine with the above structure adjusts the initial position of the second mold base through the second driving mechanism to change the mold clamping distance, thereby reducing the difficulty of adjusting the mold clamping distance and reducing the workload of manual adjustment to improve the applicability of the product.

Description

Technical Field

[0001] The present invention relates to the technical field of terminal riveting machines, in particular to a U-shaped terminal riveting machine. Background Art

[0002] Currently, U-shaped terminal riveting machines are a common type of mechanical equipment, widely used in the production of riveted terminals for wire and cable ends. During the actual terminal riveting process, due to varying product requirements, the number and diameter of wires or cables riveted to the same terminal vary, resulting in corresponding differences in the closing distance between the two dies used to rivet the terminal. However, existing U-shaped terminal riveting machines typically require manual disassembly of the two dies to adjust the closing distance to accommodate the varying number and diameter of wires or cables. This makes adjustment difficult and labor-intensive. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a U-shaped terminal riveting machine, which aims to reduce the difficulty of adjusting the mold closing distance and the workload of manual adjustment, thereby improving the applicability of the product.

[0004] According to an embodiment of the present invention, a U-shaped terminal riveting machine includes: a frame; a feeding mechanism, provided on the frame, for conveying U-shaped terminals; a clamping mechanism, provided on the frame, including a first die base and a second die base arranged opposite to each other in a horizontal direction, the second die base being capable of moving closer to or away from the first die base to rivet the U-shaped terminal conveyed by the feeding mechanism to a workpiece to be processed; a first driving mechanism, provided on the frame, for driving the second die base to move closer to or away from the first die base within a fixed stroke; and a second driving mechanism, provided on the frame, for adjusting the starting position of the second die base relative to the first die base.

[0005] The U-shaped terminal riveting machine according to the embodiment of the present invention has at least the following beneficial effects: when in use, the feeding mechanism conveys the U-shaped terminal between the first die base and the second die base, and then places the wiring harness to be riveted on the U-shaped terminal, and finally starts the first driving mechanism to move the second die base close to the first die base, thereby achieving the effect of riveting the U-shaped terminal to the wiring harness. When it is necessary to adjust the mold closing distance according to the number and diameter of the wiring harness, the second driving mechanism is first started to adjust the starting position of the movement of the second die base, thereby changing the mold closing distance between the second die base and the first die base. There is no need to manually disassemble the second die base to quickly adjust the mold closing distance of the wiring harness, which reduces the difficulty of manual operation and the applicability of the product. Among them, separating the riveting process and the process of adjusting the mold closing distance is conducive to improving the accuracy of adjusting the second die base.

[0006] In some embodiments of the present invention, the first driving mechanism includes a crank member, a connecting rod, a sliding member and a first driver, the crank member is movably mounted on the frame, one end of the connecting rod is rotatably connected to the crank member, the other end of the connecting rod is rotatably connected to the sliding member, the sliding member is connected to the first mold base, and the first driver is connected to the crank member to drive the crank member to rotate, so that the sliding member drives the second mold base to move closer to or away from the first mold base.

[0007] In some embodiments of the present invention, the crank member includes a first swing arm and a second swing arm arranged at an angle, the first driver is a linear cylinder, the telescopic end of the linear cylinder is connected to the first swing arm, and the second swing arm is rotated away from the end of the first swing arm to be connected to the connecting rod. Driven by the linear cylinder, the first swing arm drives the second swing arm to deflect.

[0008] In some embodiments of the present invention, the frame is provided with two proximity switches spaced apart in the horizontal direction, the telescopic end of the linear cylinder is provided with a sensing element, and the two proximity switches are used to limit the moving stroke of the sensing element.

[0009] In some embodiments of the present invention, the second driving mechanism includes a screw, a sleeve and a rotary driver, the screw extending in a horizontal direction, the rotary driver connected to the screw to drive the screw to rotate, the sleeve slidably sleeved on the outside of the screw, the end of the sleeve away from the rotary driver is rotatably connected to the crank member, and under the rotation of the screw, the sleeve expands and contracts relative to the screw to change the fulcrum position of the crank member relative to the frame.

[0010] In some embodiments of the present invention, the first die base is fixed to the frame, the first die base is provided with a side pressure plate extending in the horizontal direction, the second die base is provided with a cutter facing the side pressure plate, the cutter is provided with a slot for movably inserting the side pressure plate, and a processing area for riveting the workpiece is defined between the bottom wall of the slot and the side pressure plate.

[0011] In some embodiments of the present invention, the side wall of the side pressure plate opposite to the cutter is a first arcuate surface, the bottom wall of the slot has two second arcuate surfaces facing the first arcuate surface, and the connection between the two second arcuate surfaces forms a tip portion.

[0012] In some embodiments of the present invention, one of the first mold base and the second mold base is provided with a guide groove extending in a horizontal direction, and the other is provided with a clamping block slidably engaged with the guide groove.

[0013] In some embodiments of the present invention, the feeding mechanism includes a material guiding component and a material shifting component, the material guiding component is provided with a material guiding channel facing the processing area, the material guiding channel is used to convey a terminal strip continuously connected by a plurality of the U-shaped terminals, and the material shifting component is used to push the U-shaped terminals to the processing area one by one.

[0014] In some embodiments of the present invention, the material-push-pull assembly includes a second driver, a sliding plate, and a pusher claw, the pusher claw swings around a fixed point on the frame, the second driver is connected to the sliding plate to drive the sliding plate to move back and forth along the conveying direction of the terminal strip, the sliding plate is linked to the pusher claw, and there is a bayonet position between two adjacent U-shaped terminals, at least part of the pusher claw can be engaged in the bayonet position, and under the drive of the second driver, the sliding plate drives the pusher claw to swing back and forth, so that the pusher claw pushes the terminal strip toward the processing area, and can be reset to be engaged in the next bayonet position.

[0015] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0017] Figure 1 It is a structural schematic diagram of an embodiment of a U-shaped terminal riveting machine of the present invention;

[0018] Figure 2 for Figure 1 A schematic structural diagram of an embodiment with some parts removed;

[0019] Figure 3 for Figure 2 A schematic diagram of the partial structure of the first die base, the second die base and the feeding mechanism;

[0020] Figure 4 for Figure 3 A local enlarged view of point A in FIG;

[0021] Figure 5 for Figure 3 Exploded diagram with some parts removed;

[0022] Figure 6 for Figure 3 A structural diagram of the feeding mechanism from another perspective;

[0023] Figure 7 for Figure 1 A schematic structural diagram of a U-shaped terminal in an embodiment.

[0024] In the figure: frame 100, feeding mechanism 200, U-shaped terminal 201, material guide assembly 210, material guide channel 211, material shifting assembly 220, second driver 221, sliding plate 222, shifting claw 223, mold clamping mechanism 300, first mold base 310, side pressure plate 311, first curved surface 312, block 313, second mold base 320, cutter 321, slot 322, second curved surface 323, guide groove 324, second driving mechanism 400, sleeve 410, rotary driver 420, crank member 500, first swing arm 501, second swing arm 502, connecting rod 510, sliding member 520, first driver 530, proximity switch 540. DETAILED DESCRIPTION

[0025] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0026] In the description of the present invention, it should be understood that descriptions involving orientations, such as the orientations or positional relationships indicated by terms such as "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside", are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] In the description of the present invention, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0028] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0029] See also Figures 1 to 3 A U-shaped terminal riveting machine includes: a frame 100; a feeding mechanism 200, which is provided on the frame 100 and is used to convey the U-shaped terminal 201; a clamping mechanism 300, which is provided on the frame 100 and includes a first die base 310 and a second die base 320 arranged opposite to each other in a horizontal direction, and the second die base 320 can move close to or away from the first die base 310 to rivet the U-shaped terminal 201 conveyed by the feeding mechanism 200 to the workpiece to be processed; a first driving mechanism, which is provided on the frame 100 and is used to drive the second die base 320 to move close to or away from the first die base 310 within a fixed stroke; a second driving mechanism 400, which is provided on the frame 100 and is used to adjust the starting position of the second die base 320 relative to the first die base 310.

[0030] When the U-shaped terminal riveting machine of the above structure is in use, the feeding mechanism 200 conveys the U-shaped terminal 201 between the first die base 310 and the second die base 320, then places the wiring harness to be riveted on the U-shaped terminal 201, and finally activates the first drive mechanism to move the second die base 320 closer to the first die base 310, thereby achieving the effect of riveting the U-shaped terminal 201 to the wiring harness. When it is necessary to adjust the mold closing distance according to the number and diameter of the wiring harness, the second drive mechanism 400 is first activated to adjust the starting position of the movement of the second die base 320, thereby changing the mold closing distance between the second die base 320 and the first die base 310. There is no need to manually disassemble the second die base 320 to quickly adjust the mold closing distance of the wiring harness, which reduces the difficulty of manual operation and makes the product more applicable. Among them, separating the riveting process and the process of adjusting the mold closing distance is conducive to improving the accuracy of adjusting the second die base 320.

[0031] See also Figure 2 In some embodiments of the present invention, the first driving mechanism includes a crank member 500, a connecting rod 510, a sliding member 520 and a first driver 530. The crank member 500 is movably installed on the frame 100. One end of the connecting rod 510 is rotatably connected to the crank member 500, and the other end of the connecting rod 510 is rotatably connected to the sliding member 520. The sliding member 520 is connected to the first mold base 310. The first driver 530 is connected to the crank member 500 to drive the crank member 500 to rotate, so that the sliding member 520 drives the second mold base 320 to move closer to or away from the first mold base 310.

[0032] Specifically, the crank member 500, connecting rod 510, and slider 520 form a crank-slider mechanism, whereby the slider 520 drives the second mold base 320 to move back and forth linearly. When the first driver 530 drives the crank member 500 to deflect within a constant angular range, the slider 520's travel distance is also fixed, allowing the second mold base 320 to move toward or away from the first mold base 310 at a fixed travel distance. The slider 520 is a horizontally extending elongated block, and the frame 100 is provided with a slide groove that cooperates with the elongated block. The slide groove, the second mold base 320, and the first mold base 310 are sequentially arranged on the same straight line. The slide groove and the elongated block cooperate to guide and limit the movement of the second mold base 320.

[0033] See also Figure 2 In some embodiments of the present invention, the crank member 500 includes a first swing arm 501 and a second swing arm 502 arranged at an angle. The first driver 530 is a linear cylinder. The telescopic end of the linear cylinder is connected to the first swing arm 501, and the second swing arm 502 is rotatably connected to the connecting rod 510 at one end away from the first swing arm 501. Driven by the linear cylinder, the first swing arm 501 drives the second swing arm 502 to deflect.

[0034] Specifically, when the linear cylinder drives the first swing arm 501 to deflect, the second swing arm 502 generates a corresponding deflection to form the crank portion of the crank slider mechanism. The use of a linear cylinder drive is advantageous in providing a larger output power to the crank slider mechanism, thereby ensuring that the second mold base 320 has a better mold clamping pressure to improve the riveting effect of the workpiece. It is understood that the first driver 530 can also be replaced with a hydraulic cylinder or an electric push rod, etc., as required. Furthermore, the crank member 500 can also be configured as a disc member, with the output end of the first driver 530 and the connecting rod 510 being rotatably connected to different positions of the disc member. The first driver 530 drives the disc member to rotate, thereby causing the disc member to drive the connecting rod 510 to generate corresponding movement.

[0035] See also Figure 2 In some embodiments of the present invention, the frame 100 is provided with two proximity switches 540 spaced apart in the horizontal direction, and a sensing element is provided at the telescopic end of the linear cylinder. The two proximity switches 540 are used to limit the moving stroke of the sensing element.

[0036] Specifically, a linear cylinder generally includes a controller, a solenoid valve, a cylinder body, and a piston rod. An external air circuit supplies air to the cylinder body so that the piston rod can extend and retract relative to the cylinder body. The controller is electrically connected to the solenoid valve, which is used to control the on and off of the air circuit. The proximity switch 540 is electrically connected to the controller, and a sensing element is provided at one end of the piston rod. When the proximity switch 540 senses the position of the sensing element, the proximity switch 540 feeds a signal back to the controller, which then controls the solenoid valve to turn the air supply on and off, thereby controlling the movement of the piston rod to limit the displacement of the sensing element, thereby enabling the linear cylinder to drive the first swing arm 501 to deflect with a fixed stroke, and ultimately fixing the angle range of the deflection of the second swing arm 502. Among them, the proximity switch 540 is a position switch that does not require direct mechanical contact with the moving parts for operation. It has reliable operation and fast response, and can improve the accuracy of the stroke control of the sensing element.

[0037] See also Figure 1 and Figure 2 In some embodiments of the present invention, the second driving mechanism 400 includes a screw, a sleeve 410 and a rotation driver 420. The screw is extended in the horizontal direction. The rotation driver 420 is connected to the screw to drive the screw to rotate. The sleeve 410 is slidably sleeved on the outside of the screw. The end of the sleeve 410 away from the rotation driver 420 is rotatably connected to the crank member 500. Under the rotation of the screw, the sleeve 410 extends and contracts relative to the screw to change the fulcrum position of the crank member 500 relative to the frame 100.

[0038] Specifically, the rotary driver 420 is a motor, the output shaft of which is connected to a screw, and the sleeve 410 is threadedly engaged with the screw. When the rotary driver 420 drives the screw to rotate, the sleeve 410 drives the crank member 500 to move back and forth linearly along the length of the screw, which facilitates adjustment of the fulcrum position of the crank member 500 relative to the frame 100, thereby changing the installation position of the crank portion in the crank slider mechanism, thereby adjusting the travel of the slider 520 relative to the frame 100, and ultimately achieving the effect of adjusting the mold closing distance between the second mold base 320 and the first mold base 310. The motor-driven screw rotation method provides smooth transmission and facilitates precise adjustment of the displacement of the crank member 500, thereby improving the accuracy of adjusting the mold closing distance. In some embodiments, the second drive mechanism 400 can also be replaced with a motor-driven rack and pinion method, which can also drive the crank member 500 to move back and forth linearly relative to the frame 100.

[0039] See also Figures 3 to 5In some embodiments of the present invention, a first die base 310 is fixed to the frame 100. The first die base 310 is provided with a side pressure plate 311 extending horizontally. The second die base 320 is provided with a cutter 321 facing the side pressure plate 311. The cutter 321 is provided with a slot 322 for the side pressure plate 311 to be movably inserted. The bottom wall of the slot 322 and the side pressure plate 311 define a processing area for riveting the workpiece. Specifically, the feeding mechanism 200 feeds the U-shaped terminal 201 between the side pressure plate 311 and the cutter 321. The wire harness to be riveted is then placed on the U-shaped terminal 201. The first driving mechanism drives the second die base 320 to move, causing the cutter 321 to rivet the U-shaped terminal 201 onto the wire harness.

[0040] See also Figure 4 and Figure 7 In some embodiments of the present invention, the side wall of the side pressure plate 311 facing the cutter 321 is a first curved surface 312. The bottom wall of the slot 322 has two second curved surfaces 323 facing the first curved surface 312. The connection between the two second curved surfaces 323 forms a pointed end. Specifically, when the cutter 321 stops moving, the two second curved surfaces 323 form a circular area with the first curved surface 312. The U-shaped terminal 201 is subjected to force within the circular area, causing it to bend and deform, ultimately wrapping and compressing the metal portion of the wiring harness.

[0041] See also Figure 3 and Figure 5 In some embodiments of the present invention, one of the first mold base 310 and the second mold base 320 is provided with a guide groove 324 extending horizontally, and the other is provided with a clamping block 313 that slidably engages with the guide groove 324. Specifically, the cooperation between the guide groove 324 and the clamping block 313 facilitates guiding and limiting the movement of the second mold base 320, thereby preventing the movement of the second mold base 320 from deviating and affecting subsequent wire harness processing.

[0042] See also Figure 2 、 Figure 3 、 Figures 5 to 7 In some embodiments of the present invention, the feeding mechanism 200 includes a material guide assembly 210 and a material prying assembly 220. The material guide assembly 210 is provided with a material guide channel 211 facing the processing area. The material guide channel 211 is used to convey a terminal strip composed of a plurality of U-shaped terminals 201 connected in series. The material prying assembly 220 is used to push the U-shaped terminals 201 to the processing area one by one. Specifically, the material guide assembly 210 includes two material guide plates, which are spliced together to form a material guide channel 211 facing the processing area. When the material prying mechanism conveys the terminal strip to the processing area, the cutter 321 cuts the terminal strip while riveting the U-shaped terminal 201, so that a single U-shaped terminal 201 is riveted onto the wiring harness.

[0043] See also Figures 5 to 7 In some embodiments of the present invention, the material-selecting assembly 220 includes a second driver 221, a sliding plate 222 and a claw 223. The claw 223 swings around a fixed point on the frame 100. The second driver 221 is connected to the sliding plate 222 to drive the sliding plate 222 to move back and forth along the conveying direction of the terminal strip. The sliding plate 222 is linked to the claw 223. There is a bayonet position between two adjacent U-shaped terminals 201. At least part of the claw 223 can be engaged in the bayonet position. Under the drive of the second driver 221, the sliding plate 222 drives the claw 223 to swing back and forth, so that the claw 223 pushes the terminal strip toward the processing area and can be reset to be engaged in the next bayonet position.

[0044] Specifically, the second actuator 221 is a pneumatic cylinder, the telescopic end of which is connected to a sliding plate 222. The feed mechanism 200 has an opening that communicates with the material guide channel 211. At least a portion of the pusher claw 223 is internally positioned within the material guide channel 211 and engages with the terminal strip's bayonet position. Driven by the pneumatic cylinder, the sliding plate 222 moves, causing the pusher claw 223 to deflect, thereby pushing the terminal strip toward the processing area. The sliding plate 222 then moves in the opposite direction, driving the pusher claw 223 to deflect in the opposite direction, allowing the pusher claw 223 to reset to the next bayonet position engaged with the terminal strip. This allows the feed mechanism 200 to deliver the U-shaped terminals 201 to the processing area one by one at a time, facilitating individual processing of wire harnesses.

[0045] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0046] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A U-shaped terminal riveting machine, characterized in that: include: rack(100); A feeding mechanism (200), provided on the frame (100), for conveying U-shaped terminals (201); a clamping mechanism (300) disposed on the frame (100) and comprising a first die base (310) and a second die base (320) disposed opposite to each other in a horizontal direction, wherein the second die base (320) is capable of moving closer to or farther from the first die base (310) to rivet the U-shaped terminal (201) delivered by the feeding mechanism (200) to a workpiece to be processed; a first driving mechanism, provided on the frame (100), for driving the second mold base (320) to move closer to or away from the first mold base (310) within a fixed stroke; a second driving mechanism (400), provided on the frame (100), for adjusting the starting position of the second mold base (320) relative to the first mold base (310); The first die base (310) is fixed to the frame (100), the first die base (310) is provided with a side pressure plate (311) extending in the horizontal direction, the second die base (320) is provided with a cutter (321) facing the side pressure plate (311), the cutter (321) is provided with a slot (322) for the side pressure plate (311) to be movably inserted, and a processing area for riveting a workpiece is defined between the bottom wall of the slot (322) and the side pressure plate (311); the side wall of the side pressure plate (311) opposite to the cutter (321) is the first die base. The arc surface (312) is provided, and the bottom wall of the slot (322) has two second arc surfaces (323) facing the first arc surface (312), and the connection between the two second arc surfaces (323) forms a tip portion; one of the first mold base (310) and the second mold base (320) is provided with a guide groove (324) extending in the horizontal direction, and the other is provided with a block (313) that slides with the guide groove (324); the feeding mechanism (200) includes a material guide component (210) and a material shifting component (220), the material guide component The assembly (210) is provided with a material guide channel (211) toward the processing area, the material guide channel (211) is used to convey a terminal strip continuously connected by a plurality of the U-shaped terminals (201), and the material shifting assembly (220) is used to push the U-shaped terminals (201) one by one to the processing area; the material shifting assembly (220) includes a second driver (221), a sliding plate (222) and a shifting claw (223), the shifting claw (223) swings around a fixed point on the frame (100), and the second driver (221) is connected to the sliding plate (222) To drive the sliding plate (222) to move back and forth along the conveying direction of the terminal strip, the sliding plate (222) is linked to the pusher claw (223), and there is a bayonet position between two adjacent U-shaped terminals (201), and at least part of the pusher claw (223) can be engaged in the bayonet position. Under the drive of the second driver (221), the sliding plate (222) drives the pusher claw (223) to swing back and forth, so that the pusher claw (223) pushes the terminal strip toward the processing area and can be reset to be engaged in the next bayonet position.

2. A U-shaped terminal riveting machine according to claim 1, characterized in that: The first driving mechanism comprises a crank member (500), a connecting rod (510), a sliding member (520) and a first driver (530), wherein the crank member (500) is movably mounted on the frame (100), one end of the connecting rod (510) is rotatably connected to the crank member (500), and the other end of the connecting rod (510) is rotatably connected to the sliding member (520), and the sliding member (520) is connected to the first mold base (310). The first driver (530) is connected to the crank member (500) to drive the crank member (500) to rotate, so that the sliding member (520) drives the second mold base (320) to move closer to or away from the first mold base (310).

3. The U-shaped terminal riveting machine according to claim 2, characterized in that: The crank member (500) comprises a first swing arm (501) and a second swing arm (502) arranged at an angle, the first driver (530) being a linear cylinder, the telescopic end of the linear cylinder being connected to the first swing arm (501), and the end of the second swing arm (502) away from the first swing arm (501) being rotatably connected to the connecting rod (510), and driven by the linear cylinder, the first swing arm (501) drives the second swing arm (502) to deflect.

4. A U-shaped terminal riveting machine according to claim 3, characterized in that: The frame (100) is provided with two proximity switches (540) spaced apart in the horizontal direction, the telescopic end of the linear cylinder is provided with a sensing element, and the two proximity switches (540) are used to limit the movement stroke of the sensing element.

5. The U-shaped terminal riveting machine according to claim 2, characterized in that: The second driving mechanism (400) includes a screw, a sleeve (410) and a rotary driver (420), wherein the screw extends in a horizontal direction, the rotary driver (420) is connected to the screw to drive the screw to rotate, the sleeve (410) is slidably sleeved on the outside of the screw, and one end of the sleeve (410) away from the rotary driver (420) is rotatably connected to the crank member (500), and under the rotation of the screw, the sleeve (410) is extended and retracted relative to the screw to change the fulcrum position of the crank member (500) rotating relative to the frame (100).

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