Crank connecting rod structure with dead point adjustment and terminal machine

Abstract

The present invention relates to the field of transmission machinery, and specifically discloses a crank-connecting rod structure with dead point adjustment, the crank-connecting rod structure with dead point adjustment comprises a mounting carrier, a rotating shaft is rotatably connected to the mounting carrier, an eccentric part is arranged at one end of the rotating shaft, one end of a first connecting rod is pivotally connected to the eccentric part, and the pivot connecting the first connecting rod and the eccentric part is eccentric to the rotating shaft; a connecting shaft rotatably passes through the other end of the first connecting rod, and a second connecting rod and a third connecting rod are also rotatably connected to the connecting shaft; the connecting shaft connects the first connecting rod, the second connecting rod and the third connecting rod to form a rotating fulcrum; a slider is pivotally connected to the other end of the second connecting rod, and the slider is arranged in a guide slot, and the other end of the third connecting rod is rotatably connected to an adjusting mechanism; a motor drives the rotating shaft to rotate, so that the first connecting rod pushes the angle between the second connecting rod and the third connecting rod to continuously change, and pushes the slider to slide along the guide slot; the adjusting mechanism adjusts the position of the fulcrum to change the dead point position of the slider.

Description

Technical Field

[0001] The invention relates to the field of transmission machinery, and in particular to a crank-connecting rod structure with dead point adjustment and a terminal machine. Background Art

[0002] Crank-connecting rod mechanisms are widely used in mechanical transmission mechanisms. Crank-connecting rod mechanisms usually have a slider pivotally connected to the free end of a connecting rod, and the slider is driven to move linearly through the linkage of the connecting rod; such as a three-link connecting rod mechanism; the ends of the three connecting rods are pivotally connected together; and the other end of one of the connecting rods is rotatably connected to an electric crankshaft or an eccentric part, another connecting rod is rotatably connected to a fixed part, and the free end of another connecting rod is rotatably connected to the slider, and the slider can be driven to move linearly through the rotation of the crankshaft.

[0003] Chinese patent document, patent publication number: CN203983699U, patent name: terminal crimping machine, which discloses the above-mentioned crank connecting rod structure; specifically discloses: the terminal crimping machine includes a frame, a servo motor, a terminal fixed on the frame, a screw rod slidably arranged on the frame, a connecting rod mechanism, a slider and a punch, the two ends of the rod are respectively connected to the servo motor and one end of the connecting rod mechanism, the other end of the connecting rod mechanism is connected to the punch through the slider, and a mold mounting plate for placing the mold is provided under the frame, and the screw rod and the connecting rod mechanism are driven by the servo motor to drive the slider to push the punch toward the mold mounting plate for stamping. Movement, thereby crimping the terminal; wherein the connecting rod mechanism includes a first connecting rod, a second connecting rod and a third connecting rod, one end of the first connecting rod, the second connecting rod and the third connecting rod are all rotatably connected to the fixed seat through a rotating shaft, the other end of the first connecting rod is rotatably connected to the sliding seat, the other end of the second connecting rod is rotatably connected to the fixed seat, and the other end of the third connecting rod is rotatably connected to the slider; in this way, when the sliding seat slides relative to the linear slide rail, the sliding seat will drive the first connecting rod, the second connecting rod and the third connecting rod to rotate relative to each other, so as to drive the slider to slide along the slide groove, and then the slider pushes the punch toward the mold mounting plate to punch, thereby completing the terminal crimping action. However, the end of the second connecting rod of the structure is pivotally connected to the fixed seat, so the bottom dead point position of the punch remains unchanged; in the actual application process, the upper die is installed on the punch, and the upper die and the lower die are combined to complete the terminal forming on the wire through the up and down movement of the punch; because the mold is inevitably prone to errors during the production process or during the application process, it will cause the terminal to be not punched in place when the upper die and the lower die are combined to punch the terminal, so it is necessary to adjust the height of the lower die, such as using a gasket to raise it, or grinding the bottom of the lower die seat down, which makes it extremely inconvenient to use; and the bottom dead point position of the punch is inconvenient, so it can only meet the terminal punching mold of one mold height, resulting in its single use. In view of the above defects, it is necessary to design a crank connecting rod structure and terminal machine with dead point adjustment. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a crank connecting rod structure and a terminal machine with dead point adjustment, so as to solve the problems of inconvenience in use and single application caused by the fixed dead point of the current connecting rod mechanism.

[0005] To solve the above technical problems, the technical solution of the present invention is: a crank-connecting rod structure with dead point adjustment comprises a mounting carrier, a rotating shaft is rotatably connected to the mounting carrier, an eccentric part is arranged at one end of the rotating shaft, one end of the first connecting rod is pivotally connected to the eccentric part, and the pivot connecting the first connecting rod and the eccentric part is eccentric to the rotating shaft; a connecting shaft can rotatably pass through the other end of the first connecting rod, and the second connecting rod and the third connecting rod are also rotatably connected to the connecting shaft; the connecting shaft connects the first connecting rod, the second connecting rod and the third connecting rod to form a rotating fulcrum; the other end of the second connecting rod is pivotally connected to a slider, the slider is arranged in a guide slot, and the other end of the third connecting rod is rotatably connected to an adjustment mechanism; a motor drives the rotating shaft to rotate, so that the first connecting rod pushes the angle between the second connecting rod and the third connecting rod to change continuously, and pushes the slider to slide along the guide slot; the adjustment mechanism adjusts the position of the fulcrum to change the dead point position of the slider.

[0006] Furthermore, the adjustment mechanism pushes the third connecting rod to move up and down to adjust the fulcrum position.

[0007] Further, the adjustment mechanism comprises:

[0008] An adjusting slider is slidably connected to the carrier, an adjusting slot is provided at the bottom of the adjusting slider, and an angle between the adjusting slot and the sliding track of the slider is not 90° or 0°;

[0009] A connecting block is slidably connected in the adjusting slide slot, and the third connecting rod is pivotally connected to the connecting block;

[0010] The pushing mechanism pushes the adjusting slider to slide, so that the adjusting slider pushes the connecting block to move up and down.

[0011] Furthermore, the cross section of the adjusting slide groove is "T"-shaped, and the upper end of the connecting block extends into the adjusting slide groove and can slide along the two limit grooves of the adjusting slide groove.

[0012] Furthermore, the two limit grooves in the adjusting slide groove form an angle other than 90° and 0° with the sliding trajectory of the slider.

[0013] Furthermore, the side wall of the mounting carrier is provided with a second guide slot, and the connecting block is slidably connected to the second guide slot; the pushing mechanism pushes the adjusting slider to slide horizontally, so that the connecting block slides along the second guide slot. Furthermore, the center line of the second guide slot is on the same straight line as the center line of the guide slot.

[0014] Furthermore, the pushing mechanism includes a first adjusting screw rotatably connected to the mounting carrier, and a screw hole cooperating with the adjusting screw is provided on one side of the adjusting slider. The first adjusting screw is rotated to drive the adjusting slider to slide.

[0015] Furthermore, the pushing mechanism includes a second adjusting screw and an adjusting nut; the adjusting nut is sleeved on the second adjusting screw, the adjusting nut is rotatably connected to a mounting portion extending outward from the mounting carrier, and the end of the second adjusting screw is connected to the adjusting slider; rotating the adjusting nut drives the second adjusting screw and the adjusting slider to move.

[0016] Furthermore, a worm wheel is provided on the adjusting nut; a worm is meshed with the worm wheel and is rotationally connected to the mounting carrier; the worm is rotated to drive the worm wheel and the second adjusting screw to rotate.

[0017] Furthermore, a servo motor arranged on the mounting carrier drives the worm to rotate.

[0018] Furthermore, an open groove is provided at the end of the third connecting rod, the end of the first connecting rod extends into the open groove, the second connecting rod includes two connecting plates, the two connecting plates are distributed on the two outer side walls of the open groove and fit together, and the connecting shaft passes through the two connecting plates, forming the two side plates of the open groove and the first connecting rod.

[0019] The terminal machine includes the crank-connecting rod structure for dead point adjustment, and also includes an upper mold connecting seat and a lower mold mounting seat; the mounting carrier includes a base, a supporting side plate and a mounting plate; the two supporting side plates are fixedly mounted on both sides of the base, the mounting plate is fixedly mounted on the upper end between the two supporting side plates, and a mold mounting area is formed between the bottom of the mounting plate and the base; the rotating shaft is rotatably connected to the mounting plate, and the adjusting slider of the adjusting mechanism is slidably connected to the mounting plate; the upper mold connecting seat is arranged at the bottom of the slider, and the lower mold mounting seat is arranged at the top of the base.

[0020] Furthermore, two support blocks are provided on the outer side of the mounting plate, and the two support blocks form the guide slide groove; the upper end of the mounting plate is provided with a support portion extending outward, and a third guide slide groove recessed inward, and the third guide slide groove is located at the bottom end of the support portion; the adjusting slider is provided with a guide connection portion extending into the third guide slide groove; one end of a limit plate is fixedly connected to the support portion, and the other end is fixedly connected to the two support blocks, one side of the adjusting slider is in contact with the side wall of the mounting plate, and the other side is in contact with the inner side of the limit plate; the pushing mechanism pushes the adjusting slider to slide along the third guide slide groove.

[0021] Furthermore, the pushing mechanism is an electric worm gear mechanism; a mounting portion is provided at the bottom of one end of the supporting portion; the worm wheel of the pushing mechanism is rotatably connected to the mounting portion, the worm is rotatably connected to the mounting plate, one end of the screw is connected to the adjusting slider, and the other end passes through the threaded hole of the worm wheel; the motor drives the worm to rotate.

[0022] Further, the lower mold mounting seat includes:

[0023] A lower die seat, arranged on the base;

[0024] A locking plate is arranged on the lower die base, the top of the locking plate is arranged in the accommodating cavity, and is used to accommodate the pressure sensor. One end of the top is provided with a step extending upward, and the height of the step is 0.1 to 0.2 mm;

[0025] A connecting plate fixedly connected to the top surface of the step;

[0026] The locking mold part is arranged on the connecting plate.

[0027] Furthermore, the front end of the supporting side plate is also provided with a gap to avoid air, and a protective cover covers the gap to avoid air; two supporting connecting rods are pivotally connected to the outer side of the supporting side plate, and the other end of the supporting connecting rod is pivotally connected to the side wall of the protective cover; the protective cover is also provided with a gap to avoid air for threading the wires, and the wires pass through the gap to avoid air and extend between the upper mold and the lower mold.

[0028] Compared with the prior art, the crank-connecting rod structure with dead point adjustment has the following beneficial effects:

[0029] 1. The other end of the third connecting rod is rotatably connected to an adjusting mechanism, and the fulcrum position formed by the connection of the first connecting rod, the second connecting rod and the third connecting rod is adjusted by the adjusting mechanism, so as to adjust the dead point position of the slider. When the connecting rod mechanism is actually used, there is no need to re-modify or adjust the structural parts connected to the slider, so that the operation is simplified.

[0030] 2. When the crank-connecting rod mechanism is applied to the terminal machine, the dead point position of the lower die of the terminal machine can be adjusted through the adjustment mechanism. When there is an error between the upper die and the lower die, the position of the upper die can be adjusted directly through the adjustment mechanism, instead of adjusting the height of the lower die by adjusting the height of the die, which simplifies the operation.

[0031] 3. The dead point position of the slider is adjusted through the adjustment mechanism, so it can adapt to the use of terminal machine molds with different clamping heights, making it more widely used. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a principle diagram of the crank-connecting rod structure for dead point adjustment of the present invention;

[0033] Figure 2 It is a front view of the crank-connecting rod structure with dead point adjustment of the present invention;

[0034] Figure 3 It is a stereoscopic diagram of the crank-connecting rod structure with dead point adjustment of the present invention;

[0035] Figure 4 It is an internal structure diagram of the crank-connecting rod structure with dead point adjustment of the present invention;

[0036] Figure 5 It is a structural diagram of the adjustment mechanism of the crank-connecting rod structure for dead point adjustment of the present invention;

[0037] Figure 6 It is a structural diagram of another embodiment of the adjusting mechanism of the crank-connecting rod structure for dead point adjustment of the present invention;

[0038] Figure 7 It is a structural diagram of the pushing mechanism of the crank-connecting rod structure with dead point adjustment of the present invention;

[0039] Figure 8 It is a structural diagram of the terminal machine of the present invention;

[0040] Fig. 9 It is the internal structure diagram of the terminal machine of the present invention;

[0041] Fig.10 It is a structural diagram of the adjustment mechanism of the terminal machine of the present invention;

[0042] Fig.11 The terminal machine of the present invention is provided with a protective cover.

[0043] Fig.12 It is an exploded view of the lower die mounting base of the terminal machine of the present invention. DETAILED DESCRIPTION

[0044] The following specific implementation manner will be further described in conjunction with the above-mentioned drawings.

[0045] In the following, various specific details are set forth in order to provide a thorough understanding of the concepts underlying the described embodiments. However, it will be apparent to those skilled in the art that the described embodiments may be practiced without some or all of these specific details. In other cases, well-known processing steps are not specifically described.

[0046] Please refer to Figure 1 to Figure 3The crank connecting rod structure with dead point adjustment comprises a mounting carrier 1, on which a rotating shaft 2 is rotatably connected, an eccentric portion 20 is arranged at one end of the rotating shaft 2, one end of a first connecting rod 3 is pivotally connected to the eccentric portion 20, and a pivot connecting the first connecting rod 3 and the eccentric portion 20 is eccentric to the rotating shaft 2. A connecting shaft 4 rotatably passes through the other end of the first connecting rod 3, and a second connecting rod 5 and a third connecting rod 6 are also rotatably connected to the connecting shaft 4; the connecting shaft 4 connects the first connecting rod 3, the second connecting rod 5 and the third connecting rod 6 to form a rotating fulcrum A. A slider 7 is pivotally connected to the other end of the second connecting rod 5, and the slider 7 is arranged in a guide slot 8. When the motor 9 drives the rotating shaft 2 to rotate, the first connecting rod 3 is driven to make a curved motion, thereby pushing the angle between the second connecting rod 5 and the third connecting rod 6 to change continuously, so as to push the slider 7 to slide along the guide slot 8.

[0047] The other end of the third connecting rod 6 is rotatably connected to an adjusting mechanism 100; the adjusting mechanism 100 adjusts the position of the fulcrum A, and when driving the slider 7 to slide, the dead point position of the slider 7 can be changed.

[0048] When the crank connecting rod structure with dead point adjustment in this embodiment is applied to a punching machine or a terminal machine, the position of the lower dead point of the upper die can be adjusted, and when there is a deviation in the clamping of the upper die and the lower die, it is easy to adjust, and the clamping height can also be adjusted, so that the punching machine or terminal machine with this structure can be applied to a variety of different molds. The crank connecting rod structure with dead point adjustment is applied to mechanical equipment that needs to adjust the stroke of the slider 7, and the effective stroke of the slider can be directly adjusted through the adjustment mechanism 100.

[0049] Furthermore, the adjusting mechanism 100 pushes the third connecting rod 6 to move up and down, thereby adjusting the position of the fulcrum A.

[0050] Further, refer to Figures 4 to 6 The adjustment mechanism 100 includes: an adjustment slider 110, a connection block 120 and a pushing mechanism 130. Wherein:

[0051] The adjusting slider 110 is slidably connected to the carrier 1, and an adjusting slot 111 is provided at the bottom of the adjusting slider 110, and the adjusting slot 111 forms an angle other than 90° and 0° with the sliding track of the slider 7. Further, the adjusting slot 111 forms an angle other than 100° to 140° with the sliding track of the slider 7. Furthermore, the adjusting slot 111 forms an angle of 105° with the sliding track of the slider 7.

[0052] The connecting block 120 is slidably connected in the adjusting slot 111, and the third connecting rod 6 is pivotally connected to the connecting block 120; specifically, an open slot is provided at the bottom of the connecting block 120, and the end of the third connecting rod 6 is pivotally connected to the open slot.

[0053] The pushing mechanism 130 pushes the adjusting slider 110 to slide, so that the adjusting slider 110 pushes the connecting block 120 to move up and down. Specifically, when the adjusting slider 110 slides, since the adjusting slide groove 111 forms an angle with the sliding track of the slider 7, the height position of the connecting block 120 is adjusted, and the position of the fulcrum A is adjusted, thereby adjusting the dead point position of the slider 7.

[0054] Further, refer to Figure 5 and Figure 6 The cross section of the adjusting slot 111 is T-shaped, the upper end of the connecting block 120 extends into the adjusting slot 111 and can slide along the two limiting grooves 112 of the adjusting slot 111 .

[0055] Specifically, the two side walls of the adjusting slide groove 111 extend outward to form the limiting groove 112, and the bottom wall of the limiting groove 112 forms an angle other than 90° and 0° with the sliding track of the slider, preferably 105°. The two sides of the connecting block 120 are provided with limiting bosses that are slidably matched with the limiting groove 112.

[0056] Furthermore, the side wall of the mounting carrier 1 is provided with a second guide groove 10, and the connecting block 120 is slidably connected to the second guide groove 10; the pushing mechanism 130 pushes the adjusting slider 110 to slide horizontally, so that the connecting block 120 slides along the second guide groove 10, thereby adjusting the position of the third connecting rod 6, thereby adjusting the height position of the fulcrum A.

[0057] Furthermore, the center line of the second guide slot 10 is in the same straight line as the center line of the guide slot 8. In this embodiment, the thrust of the first connecting rod 3 directly and evenly acts on the second connecting rod 5 and the third connecting rod 6; the forces of the second connecting rod 5 and the second connecting rod 6 can be balanced. And the reaction force of the second connecting rod 5 on the first connecting rod 3 is equal to the reaction force of the third connecting rod 6 on the first connecting rod 3, so that the reaction forces on the first connecting rod 3 offset each other, so that the second connecting rod 5 and the third connecting rod 6 interact with each other. When the force output by the motor 9 is equal, the impact force generated by the slider 7 in this embodiment is maximized, and uneven force on the first connecting rod 3 is avoided.

[0058] Furthermore, the bottom surface of the adjusting slider 110 is an inclined surface and is parallel to the adjusting slot 111. The connecting block 120 is fitted with the bottom surface of the adjusting slider 110. The high point of the inclined surface is close to the fulcrum A. Therefore, when the connecting block 120 is subjected to force, the force on the adjusting slider 110 is directed toward the lower point of the adjusting slider.

[0059] Further, refer to Figure 5The pushing mechanism 130 includes a first adjusting screw 131 rotatably connected to the mounting carrier 1 , and a screw hole matching with the adjusting screw 131 is provided on one side of the adjusting slider 110 . The first adjusting screw 131 is rotated to drive the adjusting slider 110 to slide.

[0060] Further, refer to Figure 6 The pushing mechanism 130 includes a second adjusting screw 132 and an adjusting nut 133; the adjusting nut 133 is sleeved on the second adjusting screw 132, the adjusting nut 133 is rotatably connected to a mounting portion (not shown) extending outward from the mounting carrier 1, and the end of the second adjusting screw 132 is connected to the adjusting slider 110. Specifically, a connecting hole is provided on one side of the adjusting slider 110, one end of the second adjusting screw 132 extends into the connecting hole, and a pin passes through the second connecting screw 132 to fix it on the adjusting slider 110. The adjusting nut 133 is rotated to drive the second adjusting screw 132 and the adjusting slider 110 to move.

[0061] Further, refer to Figure 6 and Figure 7 The adjusting nut 133 is provided with a worm wheel 134; a worm 135 is meshed with the worm wheel 134 and is rotatably connected to the mounting carrier 1. The worm 135 is rotated to drive the worm wheel 134 and the second adjusting screw 132 to rotate.

[0062] Furthermore, the servo motor 136 disposed on the mounting carrier 1 drives the worm 135 to rotate. In this embodiment, the fulcrum A is adjusted by the servo motor 136.

[0063] Furthermore, an open groove is provided at the end of the third connecting rod 6, and the end of the first connecting rod 3 extends into the open groove. The second connecting rod 5 includes two connecting plates, and the two connecting plates are distributed on the two outer side walls of the open groove and fit together. The connecting shaft 4 passes through the two connecting plates, the two side plates forming the open groove and the first connecting rod 3; in this embodiment, the center lines of the first connecting rod 3, the second connecting rod 5 and the third connecting rod 6 can be made to intersect at the fulcrum A; specifically, it is understood that the forces of the first connecting rod 3, the second connecting rod 5 and the third connecting rod 6 intersect at the fulcrum A, so that the forces of the first connecting rod 3, the second connecting rod 5 and the third connecting rod 6 are balanced.

[0064] Terminal machine, please refer to Figures 1 to 9, including the crank connecting rod structure for dead point adjustment, and also including an upper mold connecting seat 200 and a lower mold mounting seat 300. The mounting carrier 1 includes a base 11, a supporting side plate 12 and a mounting plate 13. The two supporting side plates 12 are fixedly mounted on both sides of the base 11, and the mounting plate 13 is fixedly mounted on the upper end between the two supporting side plates 12, and a mold mounting area B is formed between the bottom of the mounting plate 13 and the base 11. The rotating shaft 2 is rotatably connected to the mounting plate 13, and the adjusting slider 110 of the adjusting mechanism 100 is slidably connected to the mounting plate 13; the upper mold connecting seat 200 is arranged at the bottom of the slider 7, and the lower mold mounting seat 300 is arranged at the top of the base 11. In the terminal machine in this embodiment, the upper mold of the terminal is arranged at the bottom end of the upper mold connecting seat 200, and the lower mold is mounted on the lower mold mounting seat 300. The dead point position of the slider 7 can be adjusted by the adjustment mechanism 100, thereby adjusting the mold closing height of the upper mold and the lower mold, so there is no need to adjust the mold closing height by modifying the height of the upper mold or the lower mold. In addition, the use of terminal molds of different heights can be realized.

[0065] Further, refer to Figure 8 to Figure 10 Two support blocks 1300 are provided on the outer side of the mounting plate 13, and the two support blocks 1300 form the guide slide groove 8; the upper end of the mounting plate 13 is provided with a support portion 1301 extending outward, and a third guide slide groove 1302 recessed inward, and the third guide slide groove 1302 is located at the bottom end of the support portion 1301; the adjusting slider 110 is provided with a guide connecting portion 112 extending into the third guide slide groove 1302; one end of a limiting plate 14 is fixedly connected to the supporting portion 1301, and the other end is fixedly connected to the two support blocks 1300, one side of the adjusting slider 110 is in contact with the side wall of the mounting plate 13, and the other side is in contact with the inner side of the limiting plate 14; the pushing mechanism 130 pushes the adjusting slider 110 to slide along the third guide slide groove 1302.

[0066] Further, refer to Fig.10 This embodiment is a specific implementation of the pushing mechanism 130 in the terminal machine. The pushing mechanism 130 is an electric worm gear mechanism; a mounting portion 1303 is provided at the bottom of one end of the support portion 1301; the worm wheel of the pushing mechanism 130 is rotatably connected to the mounting portion 1303, the worm is rotatably connected to the mounting plate 13, one end of the screw is connected to the adjusting slider 110, and the other end passes through the threaded hole of the worm wheel; the motor drives the worm to rotate.

[0067] Further, refer to Fig.12 The lower die mounting seat 300 includes: a lower die seat 310, a locking plate 320, a connecting plate 330 and a die locking member 340. Wherein:

[0068] The lower mold base 310 is disposed on the base 11 .

[0069] The locking plate 320 is disposed on the lower mold base 310. The top of the locking plate 320 is disposed in the accommodating cavity for accommodating the pressure sensor 350. One end of the top is provided with an upwardly extending step 321. The height of the step 321 is 0.1 to 0.2 mm, preferably 0.15 mm.

[0070] A connecting plate 330, fixedly connected to the top surface of the step 321;

[0071] The mold locking member 340 is disposed on the connecting plate 330. In this embodiment, the lower mold is locked on the connecting plate 330 by the mold locking member 340. When the terminal is formed on the end of the wire, the size of the punching force can be accurately detected by the pressure sensor 350, so that the size of the punching force can be accurately adjusted. In addition, due to the effect of the step 321, a gap is formed between the connecting plate 330 and the lower mold base 310, and the gap allows the pressure sensor 350 to fully contact the connecting plate 330.

[0072] Further, refer to Fig.11 The front end of the supporting side plate 12 is also provided with a gap to avoid air, and a protective cover 15 covers the gap to avoid air; two supporting connecting rods 16 are pivotally connected to the outer side of the supporting side plate 12, and the other end of the supporting connecting rod 16 is pivotally connected to the side wall of the protective cover 15; the protective cover 15 is also provided with a gap to avoid air for threading, and the wire passes through the gap to avoid air and extends between the upper die and the lower die. Therefore, it can protect the operator when punching the terminal.

[0073] The present invention is not limited to the above-mentioned specific implementation modes. Various changes made by ordinary technicians in this field based on the above-mentioned concepts without creative work are all within the protection scope of the present invention.

Claims

1. The crank-connecting rod structure with dead point adjustment is characterized in that: The invention comprises a mounting carrier, wherein a rotating shaft is rotatably connected to the mounting carrier, an eccentric portion is arranged at one end of the rotating shaft, one end of a first connecting rod is pivotally connected to the eccentric portion, and a pivot connecting the first connecting rod and the eccentric portion is eccentric to the rotating shaft; a connecting shaft can rotatably pass through the other end of the first connecting rod, and a second connecting rod and a third connecting rod are also rotatably connected to the connecting shaft; the connecting shaft connects the first connecting rod, the second connecting rod and the third connecting rod to form a rotating fulcrum; a slider is pivotally connected to the other end of the second connecting rod, and the slider is arranged in a guide slot, and the other end of the third connecting rod is rotatably connected to an adjusting mechanism; a motor drives the rotating shaft to rotate, so that the first connecting rod pushes the angle between the second connecting rod and the third connecting rod to change continuously, and pushes the slider to slide along the guide slot; the adjusting mechanism adjusts the position of the fulcrum to change the dead point position of the slider; The adjusting mechanism pushes the third connecting rod to move up and down to adjust the position of the fulcrum; the adjusting mechanism includes: An adjusting slider is slidably connected to the carrier, an adjusting slot is provided at the bottom of the adjusting slider, and an angle between the adjusting slot and the sliding track of the slider is not 90° or 0°; A connecting block is slidably connected in the adjusting slide slot, and the third connecting rod is pivotally connected to the connecting block; A pushing mechanism pushes the adjusting slider to slide, so that the adjusting slider pushes the connecting block to move up and down; the cross section of the adjusting slide groove is "T" shaped, the upper end of the connecting block extends into the adjusting slide groove, and can slide along the two limit grooves of the adjusting slide groove; The two limit grooves in the adjusting slide groove form an angle other than 90° and 0° with the sliding trajectory of the slider; the side wall of the mounting carrier is provided with a second guide slide groove, and the connecting block is slidably connected to the second guide slide groove; the pushing mechanism pushes the adjusting slider to slide horizontally, so that the connecting block slides along the second guide slide groove.

2. The crank-connecting rod structure with dead point adjustment according to claim 1, characterized in that: The center line of the second guide slot is in the same straight line as the center line of the guide slot.

3. The crank-connecting rod structure with dead point adjustment according to claim 1, characterized in that: The pushing mechanism comprises a first adjusting screw rotatably connected to the mounting carrier, a screw hole cooperating with the adjusting screw is provided on one side of the adjusting slider, and the first adjusting screw is rotated to drive the adjusting slider to slide.

4. The crank-connecting rod structure with dead point adjustment according to claim 1, characterized in that: The pushing mechanism includes a second adjusting screw and an adjusting nut; the adjusting nut is sleeved on the second adjusting screw, the adjusting nut is rotatably connected to a mounting portion extending outward from the mounting carrier, and the end of the second adjusting screw is connected to the adjusting slider; rotating the adjusting nut drives the second adjusting screw and the adjusting slider to move.

5. The crank-connecting rod structure with dead point adjustment according to claim 4, characterized in that: The adjusting nut is provided with a worm wheel; a worm is meshed with the worm wheel and is rotationally connected to the mounting carrier; the worm is rotated to make the worm wheel and the second adjusting screw drive the worm wheel to rotate.

6. The crank-connecting rod structure with dead point adjustment according to claim 5, characterized in that: A servo motor arranged on the mounting carrier drives the worm to rotate.

7. The crank-connecting rod structure with dead point adjustment according to any one of claims 1 to 6, characterized in that: An open groove is provided at the end of the third connecting rod, and the end of the first connecting rod extends into the open groove. The second connecting rod includes two connecting plates, and the two connecting plates are distributed on the two outer side walls of the open groove and fit together. The connecting shaft passes through the two connecting plates, forming the two side plates of the open groove and the first connecting rod.

8. Terminal machine, characterized in that, A crank-connecting rod structure with dead point adjustment as described in any one of claims 1 to 7, and also includes an upper mold connecting seat and a lower mold mounting seat; the mounting carrier includes a base, a supporting side plate and a mounting plate; the two supporting side plates are fixedly mounted on both sides of the base, the mounting plate is fixedly mounted on the upper end between the two supporting side plates, and a mold mounting area is formed between the bottom of the mounting plate and the base; the rotating shaft is rotatably connected to the mounting plate, and the adjusting slider of the adjusting mechanism is slidably connected to the mounting plate; the upper mold connecting seat is arranged at the bottom of the slider, and the lower mold mounting seat is arranged at the top of the base.

9. The terminal machine according to claim 8, characterized in that: Two support blocks are provided on the outer side of the mounting plate, and the two support blocks form the guide slide groove; the upper end of the mounting plate is provided with a support portion extending outwardly, and a third guide slide groove recessed inwardly, and the third guide slide groove is located at the bottom end of the support portion; the adjusting slider is provided with a guide connection portion extending into the third guide slide groove; one end of a limit plate is fixedly connected to the support portion, and the other end is fixedly connected to the two support blocks, one side of the adjusting slider is in contact with the side wall of the mounting plate, and the other side is in contact with the inner side of the limit plate; the pushing mechanism pushes the adjusting slider to slide along the third guide slide groove.

10. The terminal machine according to claim 9, characterized in that: The pushing mechanism is an electric worm gear mechanism; a mounting portion is provided at the bottom of one end of the supporting portion; the worm wheel of the pushing mechanism is rotatably connected to the mounting portion, the worm is rotatably connected to the mounting plate, one end of the screw is connected to the adjusting slider, and the other end passes through the threaded hole of the worm wheel; the motor drives the worm to rotate.

11. The terminal machine according to claim 8, characterized in that: The lower die mounting seat comprises: A lower die seat, arranged on the base; A locking plate is arranged on the lower die base, the top of the locking plate is arranged in the accommodating cavity, and is used to accommodate the pressure sensor. One end of the top is provided with a step extending upward, and the height of the step is 0.1 to 0.2 mm; A connecting plate fixedly connected to the top surface of the step; The locking mold part is arranged on the connecting plate.

12. The terminal machine according to claim 8, characterized in that: The front end of the supporting side plate is also provided with a gap to avoid air flow, and a protective cover covers the gap to avoid air flow; two supporting connecting rods are pivotally connected to the outer side of the supporting side plate, and the other end of the supporting connecting rod is pivotally connected to the side wall of the protective cover; the protective cover is also provided with a gap to avoid air flow for threading the wires, and the wires pass through the gap to avoid air flow and extend between the upper mold and the lower mold.

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