Ejector pin strength detection device and method for automobile lamp injection mold production

Abstract

The invention relates to an ejector pin strength detection device and method for automobile lamp injection mold production, and the ejector pin strength detection device comprises an ejector pin body, and further comprises a detection box, and a support plate and a first sliding seat which are fixed in the detection box, and the first sliding seat is slidably mounted on the support plate; a positioning assembly used for clamping an ejector pin body and a base are installed on the supporting plate, the base is fixed to the supporting plate, a sliding piece is installed on the base in a sliding mode in the length direction, an inclined piece is fixed to the end of the sliding piece, the sliding piece is connected with an adjustable resistance assembly installed on the detection box, and the adjustable resistance assembly is connected with the ejector pin body. When the reciprocating assembly drives the first sliding seat to reciprocate, the stepping assembly drives the adjustable resistance assembly to work, damping provided by the adjustable resistance assembly to the sliding piece is gradually increased, and simply, when the ejector pin body reciprocates every time, force provided by the inclined piece to the ejector pin body during testing is increased.

Description

Technical Field

[0001] The invention relates to the field of injection molding, and in particular to a device and method for detecting the strength of ejector pins used in the production of automobile lamp injection molds. Background Art

[0002] Injection ejector pins play a vital role in mold design. They are mainly used to eject the molded plastic parts from the mold cavity during the injection molding process to ensure that the plastic parts can be demolded smoothly. The design of the ejector pin should not only consider its ejection function, but also its impact on the appearance and dimensional accuracy of the plastic parts.

[0003] In production that operates for more than seven consecutive days, the high-temperature mold ejector pins will burn out and break. The mold material will fatigue under high temperature conditions, causing the ejector pin's strength to decrease, making it more likely to break.

[0004] After searching, a device for detecting the strength of ejector pins of injection molds was disclosed, with the announcement number: CN117949330B; This invention is used to detect the hardness of the ejector pin. This detection method has no substantial effect on the testing of the ejector pin because the ejector pin is in a high temperature environment during actual use, and the main reason for the ejector pin breakage is the deformation caused by thermal fatigue of the mold, which in turn causes resistance to the sliding of the ejector pin, resulting in bending / breaking. The detection of this invention can only detect the hardness of the ejector pin, but cannot detect the strength of the ejector pin. Summary of the invention

[0005] The object of the present invention is to provide a device and method for detecting the strength of ejector pins used in the production of automobile lamp injection molds, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: The ejector strength detection device used in the production of automobile lamp injection molds includes an ejector body and also includes: A detection box and a support plate fixed in the detection box; A first slide seat, the first slide seat is slidably mounted on the support plate, and a positioning component for clamping the ejector body is mounted on the support plate; A base, the base is fixed on the support plate, a slide is slidably mounted on the base along the length direction, an oblique piece is fixed at the end of the slide, and the slide is connected to an adjustable resistance component mounted on the detection box; A reciprocating assembly is installed at the bottom of the support plate and connected to the first slide seat, and the reciprocating assembly is also connected to the adjustable resistance assembly through a stepping assembly.

[0007] As a further solution of the present invention: the positioning assembly includes two clamping blocks arranged opposite to each other, and the two clamping blocks are both slidably mounted on the first slide seat; A bidirectional screw is rotatably mounted on the No. 1 slide, and the bidirectional screw is threadably matched with the screw holes arranged on the two clamping blocks. A No. 1 transmission shaft is also rotatably mounted on the No. 1 slide, and the No. 1 transmission shaft is connected to the bidirectional screw through a No. 1 bevel gear set. A knob is mounted on the end of the No. 1 transmission shaft away from the No. 1 bevel gear set.

[0008] As a further solution of the present invention: two No. 2 slide seats are relatively slidably mounted on the support plate, and heating elements are fixed on opposite sides of the two No. 2 slide seats, and the two heating elements are gap-matched with the ejector body; Transmission slide bars are installed on the two No. 2 slide seats, and the two transmission slide bars are fixed to the two clamping blocks.

[0009] As a further solution of the present invention: the adjustable resistance assembly includes an adjustment plate slidably mounted on the support plate, two guide rods fixed to the slide are slidably mounted on the adjustment plate, a spring is sleeved on the guide rod, and the spring is located between the adjustment plate and the slide; An anti-slip piece is fixed at the bottom of the slide, and the anti-slip piece cooperates with an anti-slip groove starting from the base; An adjusting component is installed on the adjusting plate, and the adjusting component is connected to the stepping component.

[0010] As a further solution of the present invention: the oblique member includes a force-bearing block, the force-bearing block is fixed to the slide, and an arc portion is provided on a side of the force-bearing block away from the slide, and the arc portion cooperates with the ejector body.

[0011] As a further solution of the present invention: the adjustment assembly includes a screw rod rotatably mounted on the adjustment plate, the screw rod is threadedly matched with a screw hole provided on the base, a first transmission rod is axially slidably mounted in the screw rod, and the first transmission rod is rotatably connected to the support plate; The support plate is also rotatably mounted with a transmission shaft, a driving disk is coaxially fixed on the transmission shaft, a driven disk is coaxially fixed on the No. 1 transmission rod, the driven disk cooperates with the driving disk, and the transmission shaft is connected to the stepping assembly; Among them, a transmission groove is opened on the inner wall of the screw rod, and the transmission groove is slidably matched with a transmission bar fixed on the No. 1 transmission rod.

[0012] As a further solution of the present invention: the reciprocating assembly includes a transmission plate rotatably mounted on the bottom of the support plate, a pawl plate fixed to the No. 1 slide seat is also installed at the bottom of the support plate, a transmission plate No. 1 is rotatably mounted at the offset of the transmission plate, and the No. 1 transmission plate is rotatably connected to the pawl plate.

[0013] As a further solution of the present invention: the stepping assembly includes a mounting groove provided at the bottom of the support plate, a ratchet wheel No. 1 cooperating with the pawl plate is rotatably mounted in the mounting groove, a transmission shaft No. 2 is also rotatably mounted in the mounting groove, and the transmission shaft No. 2 is connected to the ratchet wheel No. 1 via a transmission chain No. 1; An incomplete gear is also rotatably mounted at the bottom of the support plate. The incomplete gear is connected to the second transmission shaft through a second transmission chain, and the incomplete gear is also connected to the transmission shaft through a progressive reset assembly.

[0014] As a further solution of the present invention: the progressive reset assembly includes a No. 2 ratchet wheel rotatably mounted on the bottom of the support plate, a No. 1 gear is coaxially fixed on the rotating shaft of the No. 2 ratchet wheel, and the No. 1 gear cooperates with the incomplete gear; A support frame is also fixed at the bottom of the support plate, a No. 2 transmission plate is rotatably mounted on the support frame, a No. 3 gear and a No. 4 gear matched with the No. 1 gear are rotatably mounted on the No. 2 transmission plate, and a pushing member matched with the No. 2 transmission plate is also fixed on the rotating shaft of the No. 2 ratchet wheel; The fourth gear is rotatably mounted on a side away from the third gear, with two second gears cooperating with the fourth gear, and the two second gears are connected by a third transmission chain; A No. 3 transmission shaft is also rotatably mounted on the bottom of the support plate, and the No. 3 transmission shaft is connected to the transmission shaft via a No. 4 transmission chain. A No. 2 transmission rod is also rotatably mounted on the bottom of the support plate, and the No. 2 transmission rod is connected to the No. 3 transmission shaft via a No. 2 bevel gear set, and the No. 2 transmission rod is also connected to the rotating shaft of one of the No. 2 gears via a No. 3 bevel gear set; A tension spring is rotatably mounted at the eccentric portion of the second ratchet wheel, and the other end of the tension spring is rotatably connected to the support plate; A limiting pawl cooperating with the second ratchet is also installed at the bottom of the support plate.

[0015] The present invention also provides a method for detecting the strength of ejector pins used in the production of automobile lamp injection molds. The method adopts the method for detecting the strength of ejector pins used in the production of automobile lamp injection molds, and comprises the following steps: Step 1: Place the ejector body on the No. 1 slide seat and clamp it with the positioning assembly; Step 2: The first slide and the ejector body are driven to move toward the oblique member by the reciprocating assembly, and cooperate with the oblique member, and the strength of the ejector body is tested by the reaction force of the oblique member given to the oblique member by the guide rod; Step three, adjust the elastic force of the spring by adjusting the assembly, so that the reaction force given by the spring to the inclined member gradually increases, and then the force of each subsequent test on the ejector body will increase, so as to test the strength of the ejector body and the value of the force it can withstand by increasing the force given by the inclined member to the ejector body.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: the preparation work before the test is to open the door of the test box, and then place the ejector body on the positioning assembly on the first slide, and clamp the ejector body by the positioning assembly; When the reciprocating assembly is working, it drives the No. 1 slide and the ejector body to reciprocate toward the base. When the ejector body moves toward the base, the strength of the ejector body is tested through the contact between the ejector body and the oblique piece. When the reciprocating assembly drives the first slide to reciprocate, the stepping assembly also drives the adjustable resistance assembly to work, and the damping of the slide is gradually increased by the adjustable resistance assembly; In simple terms, the force applied by the inclined member to the ejector body during testing increases each time the ejector body performs a reciprocating motion. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of the ejector pin strength detection device used in the production of automobile headlight injection molds.

[0018] Figure 2 for Figure 1 Schematic diagram of the structure inside the detection box.

[0019] Figure 3 This is a schematic diagram of the structure of the top of the support plate in the ejector pin strength detection device used in the production of automobile headlight injection molds.

[0020] Figure 4 This is a schematic diagram of the structure of the bottom of the support plate in the ejector strength detection device used in the production of automobile lamp injection molds.

[0021] Figure 5 This is a schematic diagram of the structure of the positioning component in the ejector pin strength detection device used in the production of automobile lamp injection molds.

[0022] Figure 6 for Figure 5 Structural breakdown diagram.

[0023] Figure 7 This is a schematic diagram of the structure of the adjustable resistance component in the ejector pin strength detection device used in the production of automobile lamp injection molds.

[0024] Figure 8 for Figure 7 Schematic diagram of the structure in another direction.

[0025] Fig. 9 This is a schematic diagram of the cooperation between the oblique part and the ejector body in the ejector strength detection device produced in the injection mold of automobile headlights.

[0026] Fig.10 for Figure 7 Structural breakdown diagram.

[0027] Fig.11 This is a schematic diagram of the structure of the active disk and the driven disk in the ejector pin strength detection device used in the production of automobile lamp injection molds.

[0028] Fig.12 This is a schematic diagram of the structure of the stepper component in the ejector pin strength detection device used in the production of automobile headlight injection molds.

[0029] Fig.13 This is a schematic diagram of the structure of the No. 2 ratchet in the ejector pin strength detection device used in the production of automobile headlight injection molds.

[0030] Fig.14 for Fig.12 A plan perspective view of the middle structure.

[0031] In the figure: 1, detection box; 2, support plate; 3, ejector body; 4, No. 1 slide; 401, No. 1 transmission shaft; 402, clamping block; 403, bidirectional screw; 404, No. 1 bevel gear set; 5, No. 2 slide; 501, heating element; 502, transmission slide; 6, oblique element; 601, slide; 602, guide rod; 603, spring; 604, base; 605, adjustment plate; 606, screw; 607, No. 1 transmission rod; 608, transmission shaft; 609, driving plate; 6010, anti-slip groove; 6011, driven plate; 6012, anti-slip element; 7, transmission plate; 701, No. 1 transmission plate; 702, ratchet plate; 703, ratchet wheel No. 1; 704, ratchet wheel No. 2; 705, transmission shaft No. 2; 706, transmission chain No. 1; 707, transmission chain No. 2; 708, incomplete gear; 709, tension spring; 7010, transmission shaft No. 3; 7011, bevel gear set No. 2; 7012, transmission rod No. 2; 7013, bevel gear set No. 3; 7014, limit pawl; 7015, gear No. 1; 7016, support frame; 7017, pusher; 7018, gear No. 2; 7019, transmission chain No. 3; 7020, transmission plate No. 2; 7021, gear No. 3; 7022, gear No. 4. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0034] For example, see Figures 1 to 14 , an ejector strength detection device for automobile lamp injection mold production, comprising an ejector body 3, and also comprising: a detection box 1 and a support plate 2 fixed in the detection box 1; A first slide seat 4 slidably mounted on the support plate 2, and a positioning component for clamping the ejector body 3 is mounted on the support plate 2; A base 604 fixed on the support plate 2, a slide 601 is slidably mounted on the base 604 along the length direction, an oblique member 6 is fixed to the end of the slide 601, and the slide 601 is connected to an adjustable resistance component installed on the detection box 1; A reciprocating assembly is installed at the bottom of the support plate 2 and connected to the first slide seat 4, and the reciprocating assembly is also connected to the adjustable resistance assembly through a stepping assembly.

[0035] In the embodiment of the present invention, the preparation work before the test is to open the door of the test box 1, and then place the ejector body 3 on the positioning assembly on the first slide 4, and clamp the ejector body 3 by the positioning assembly; When the reciprocating assembly is working, it drives the first slide 4 and the ejector body 3 to reciprocate toward the base 604. When the ejector body 3 moves toward the base 604, the strength of the ejector body 3 is tested through the contact between the ejector body 3 and the oblique member 6. When the reciprocating assembly drives the first slide 4 to reciprocate, the stepping assembly also drives the adjustable resistance assembly to work, and the damping of the slide 601 is gradually increased by the adjustable resistance assembly; In short, the force applied by the inclined member 6 to the ejector body 3 during testing increases each time the ejector body 3 performs a reciprocating motion.

[0036] The positioning assembly includes two clamping blocks 402 arranged opposite to each other, and the two clamping blocks 402 are both slidably mounted on the first slide seat 4; A bidirectional screw rod 403 is rotatably mounted on the No. 1 slide 4, and the bidirectional screw rod 403 is threadedly matched with the screw holes arranged on the two clamping blocks 402. A No. 1 transmission shaft 401 is also rotatably mounted on the No. 1 slide 4, and the No. 1 transmission shaft 401 is connected to the bidirectional screw rod 403 through a No. 1 bevel gear set 404. A knob is mounted on the end of the No. 1 transmission shaft 401 away from the No. 1 bevel gear set 404.

[0037] In the embodiment of the present invention, the ejector body 3 is held and placed between the two clamping blocks 402, and then the knob is manually turned to rotate. When the knob is rotated, the first transmission shaft 401 is driven to rotate. When the first transmission shaft 401 rotates, the bidirectional screw rod 403 is driven to rotate through the first bevel gear set 404. When the bidirectional screw rod 403 rotates, the two clamping blocks 402 are driven to move relative to each other to clamp the ejector body 3 by cooperating with the screw holes on the two clamping blocks 402. Similarly, by twisting the knob in the opposite direction, the two clamps 402 can be driven to move in opposite directions to release the clamping of the ejector body 3; It should also be noted that the first bevel gear set 404 includes two bevel gears meshing with each other, and the two bevel gears are coaxially fixed to the bidirectional screw 403 and the first transmission shaft 401 respectively.

[0038] Two second slide seats 5 are relatively slidably mounted on the support plate 2, and heating elements 501 are fixed on opposite sides of the two second slide seats 5. The two heating elements 501 are clearance-matched with the ejector body 3; A transmission slide bar 502 is installed on the two No. 2 slide seats 5 , and the two transmission slide bars 502 are fixed to the two clamping blocks 402 .

[0039] In the embodiment of the present invention, when the two clamping blocks 402 move relative to each other / oppositely, the transmission slide bar 502 drives the two second slide seats 5 to move relative to each other / oppositely, and when the second slide seat 5 moves, the heating element 501 is driven to move; When the two second slide seats 5 move relative to each other to the end of the stroke, they are in a concentric state with the ejector body 3, and the ejector body 3 is heated by the heating element 501; When the clamping block 402 moves toward the base 604, the transmission slide bar 502 is driven to follow the movement. At this time, the transmission slide bar 502 and the heating element 501 are in a sliding matching state; The main function of this embodiment is to simulate the temperature during high-temperature mold processing.

[0040] The adjustable resistance assembly includes an adjustment plate 605 slidably mounted on the support plate 2, two guide rods 602 fixed to the slide 601 are slidably mounted on the adjustment plate 605, and a spring 603 is sleeved on the guide rod 602, and the spring 603 is located between the adjustment plate 605 and the slide 601; The bottom of the slide 601 is fixed with an anti-slip piece 6012, and the anti-slip piece 6012 cooperates with the anti-slip groove 6010 starting from the base 604; An adjusting component is installed on the adjusting plate 605 , and the adjusting component is connected to the stepping component.

[0041] In the embodiment of the present invention, when the stepping assembly is working, the adjustment work is driven, so that the adjustment assembly works, and the adjustment plate 605 is driven to move toward the base 604 through the adjustment assembly; When the ejector body 3 moves, it cooperates with the oblique member 6 to drive the oblique member 6 to move toward the adjustment plate 605. When the adjustment plate 605 moves, the slide 601 and the guide rod 602 are driven to move toward the adjustment plate 605. During the movement, the spring 603 is compressed. The elastic potential energy of the spring 603 when compressed exerts a force on the oblique member 6 away from the adjustment plate 605, so as to exert an opposing force on the ejector body 3 toward the adjustment plate 605 through the oblique member 6, so as to test the strength of the ejector body 3. When the spring 603 drives the inclined member 6 to move in the opposite direction away from the adjustment plate 605, the anti-slip groove 6010 and the anti-slip member 6012 cooperate to limit the travel of the heating element 501 and the inclined member 6. When the adjustment plate 605 moves toward the inclined member 6, the spring 603 is compressed, that is, the spring 603 is compressed when the inclined member 6 is not matched with the ejector body 3. The greater the compressed travel of the spring 603, the greater the force of the elastic potential energy stored in it, and thus the greater the force when the inclined member 6 cooperates with the ejector body 3. Then, the force during the test is gradually increased by adjusting the movement of the adjustment plate 605 toward the inclined member 6.

[0042] The oblique member 6 includes a force-bearing block, which is fixed to the slide 601 . A curved portion is provided on a side of the force-bearing block away from the slide 601 , and the curved portion cooperates with the ejector body 3 .

[0043] In the embodiment of the present invention, when the ejector body 3 moves, it cooperates with the arc portion of the inclined member 6 to drive the inclined member 6 to slide. When the inclined member 6 slides, the ejector body 3 compresses the spring 603. The elastic potential energy of the spring 603 during compression gives the inclined member 6 a force in the opposite direction. This force directly acts on the ejector body 3. When the strength of the ejector body 3 is insufficient, bending / fracture will occur.

[0044] The adjustment assembly includes a screw rod 606 rotatably mounted on the adjustment plate 605, the screw rod 606 is threadedly matched with a screw hole provided on the base 604, a No. 1 transmission rod 607 is axially slidably mounted in the screw rod 606, and the No. 1 transmission rod 607 is rotatably connected to the support plate 2; The support plate 2 is also rotatably mounted with a transmission shaft 608, a driving disk 609 is coaxially fixed on the transmission shaft 608, a driven disk 6011 is coaxially fixed on the first transmission rod 607, the driven disk 6011 cooperates with the driving disk 609, and the transmission shaft 608 is connected to the stepping assembly; Among them, a transmission groove is opened on the inner wall of the screw rod 606, and the transmission groove is slidably matched with a transmission bar fixed on the No. 1 transmission rod 607.

[0045] In the embodiment of the present invention, when the stepper assembly is working, the transmission shaft 608 is driven to rotate, and when the transmission shaft 608 rotates, the driven disk 6011 is driven to rotate by the cooperation with the driven disk 6011, and when the driven disk 6011 rotates, the first transmission rod 607 is driven to rotate, and when the first transmission rod 607 rotates, the screw rod 606 is driven to rotate by the cooperation of the transmission bar and the transmission groove, and when the screw rod 606 rotates, the screw rod 606 and the adjustment plate 605 are driven to move toward the base 604 by the screw thread cooperation with the screw hole of the base 604; The function of the transmission bar and the transmission groove is to prevent the two from rotating synchronously when the screw rod 606 moves axially relative to the first transmission rod 607; The active disk 609 and the driven disk 6011 in the present invention are the application of the Maltese cross movement in the prior art. Since it is a relatively mature prior art, it will not be elaborated on here. Its main function is equidistant transmission. The active disk 609 rotates one circle to drive the driven disk 6011 to rotate at a fixed angle.

[0046] The reciprocating assembly includes a transmission disk 7 rotatably mounted on the bottom of the support plate 2, and a ratchet plate 702 fixed to the No. 1 slide 4 is also installed at the bottom of the support plate 2. A No. 1 transmission plate 701 is rotatably mounted at the offset of the transmission disk 7, and the No. 1 transmission plate 701 is rotatably connected to the ratchet plate 702.

[0047] In the embodiment of the present invention, a gear ring is coaxially fixed to the edge of the transmission disk 7, and a driving gear meshing with the gear ring is rotatably installed on one side of the gear ring. A motor is also fixed to the bottom of the support plate 2, and the output shaft of the motor is coaxially fixed to the driving gear. When the motor is working, the driving gear is driven to rotate through its output shaft, and the transmission disk 7 is driven to rotate through the driving gear. When the transmission disk 7 rotates, the ratchet plate 702 and the first slide seat 4 are driven to reciprocate through the first transmission plate 701. This structure is also a common crank rocker structure. Among them, the motor and driving gear are not shown.

[0048] Embodiment 2 is distinguished from Embodiment 1 in that: the stepping assembly comprises a mounting groove provided at the bottom of the support plate 2, a No. 1 ratchet 703 cooperating with the pawl plate 702 is rotatably mounted in the mounting groove, a No. 2 transmission shaft 705 is also rotatably mounted in the mounting groove, and the No. 2 transmission shaft 705 is connected to the No. 1 ratchet 703 via a No. 1 transmission chain 706; An incomplete gear 708 is also rotatably mounted at the bottom of the support plate 2. The incomplete gear 708 is connected to the second transmission shaft 705 via a second transmission chain 707, and the incomplete gear 708 is also connected to the transmission shaft 608 via a progressive reset assembly.

[0049] In the embodiment of the present invention, the function of the mounting groove is to prevent the first transmission plate 701 from interfering with the first ratchet wheel 703 when the first transmission plate 701 moves; When the pawl plate 702 moves toward the transmission disk 7, it has no transmission relationship with the No. 1 ratchet 703. When it is reset, the No. 1 ratchet 703 is driven to rotate through the pawl plate 702. When the No. 1 ratchet 703 rotates, the No. 2 transmission shaft 705 is driven to rotate through the No. 1 transmission chain 706. When the No. 2 transmission shaft 705 rotates, the incomplete gear 708 is driven to rotate through the No. 2 transmission chain 707. When the incomplete gear 708 rotates, the progressive reset assembly drives the transmission shaft 608 to move unidirectionally and equidistantly for a certain number of circles and then resets in the opposite direction.

[0050] The progressive reset assembly includes a second ratchet wheel 704 rotatably mounted on the bottom of the support plate 2, a first gear 7015 is coaxially fixed on the rotating shaft of the second ratchet wheel 704, and the first gear 7015 cooperates with the incomplete gear 708; A support frame 7016 is also fixed to the bottom of the support plate 2, and a second transmission plate 7020 is rotatably mounted on the support frame 7016. A third gear 7021 and a fourth gear 7022 that cooperate with the first gear 7015 are rotatably mounted on the second transmission plate 7020. A pusher 7017 that cooperates with the second transmission plate 7020 is also fixed to the rotating shaft of the second ratchet 704; The fourth gear 7022 is rotatably mounted on a side away from the third gear 7021 with two second gears 7018 that match the fourth gear 7022 , and the two second gears 7018 are connected via a third transmission chain 7019 ; A third transmission shaft 7010 is also rotatably mounted at the bottom of the support plate 2, and the third transmission shaft 7010 is connected to the transmission shaft 608 via a fourth transmission chain 7023. A second transmission rod 7012 is also rotatably mounted at the bottom of the support plate 2, and the second transmission rod 7012 is connected to the third transmission shaft 7010 via a second bevel gear set 7011, and the second transmission rod 7012 is also connected to the rotating shaft of one of the second gears 7018 via a third bevel gear set 7013; A tension spring 709 is rotatably mounted at the eccentric portion of the second ratchet wheel 704, and the other end of the tension spring 709 is rotatably connected to the support plate 2; A limiting pawl 7014 cooperating with the second ratchet wheel 704 is also installed at the bottom of the support plate 2 .

[0051] In the embodiment of the present invention, when the toothed portion of the incomplete gear 708 rotates to mesh with the first gear 7015, it drives the first gear 7015 and the second ratchet 704 to rotate. When the toothed portion of the incomplete gear 708 rotates to be away from the first gear 7015, it disengages the first gear 7015 and stops rotating. When the second ratchet 704 rotates, the tension spring 709 is pulled up so that the tension spring 709 stores elastic potential energy. When the incomplete gear 708 is disengaged from the first gear 7015, the elastic potential energy of the tension spring 709 is released to drive the second ratchet 704 to rotate in the opposite direction. When the second ratchet 704 rotates in the opposite direction, the limiting pawl 7014 limits the second ratchet 704 so that the elastic potential energy stored in the tension spring 709 cannot be released, and thus the elastic potential energy of the tension spring 709 is stored. When the tension spring 709 and the second ratchet wheel 704 rotate to the side where the second ratchet wheel 704 faces the incomplete gear 708, the second ratchet wheel 704 is still limited by the limiting pawl 7014. When the incomplete gear 708 drives the first gear 7015 and the second ratchet wheel 704 to rotate once again, the elastic potential energy stored in the tension spring 709 is fully released, so that the second ratchet wheel 704 is driven to rotate by the elastic potential energy of the tension spring 709. In short, the second ratchet wheel 704 can only rotate to one side, and the rotation will be limited by the limit pawl 7014. When the rotation connection between the tension spring 709 and the second ratchet wheel 704 rotates from zero to 180 degrees, the elastic potential energy stored in the tension spring 709 will be released if the rotation continues. The rotation of the second ratchet wheel 704 is reflected in that the first half of the rotation of the second ratchet wheel 704 is intermittent rotation, and the second half of the rotation is continuous rotation. See also Figure 12-14When the second ratchet wheel 704 rotates, it also drives the pusher 7017 to rotate. When the second ratchet wheel 704 rotates to match the second transmission plate 7020, it pushes the second transmission plate 7020 to rotate with the rotation position of the support frame 7016, thereby causing the third gear 7021 to disengage from the first gear 7015, and the fourth gear 7022 to engage with the first gear 7015; The fourth gear 7022 is provided with a torsion spring. When the pusher 7017 is separated from the second transmission plate 7020, the elastic potential energy of the torsion spring is released to drive the fourth gear 7022 and the third gear 7021 to reset. Two transmission modes are realized through the above two motion states, as follows: 1. When the pusher 7017 is not engaged with the No. 2 transmission plate 7020, the No. 3 gear 7021 is meshed with the No. 1 gear 7015, and the No. 3 gear 7021 is driven to rotate by the rotation of the No. 1 gear 7015. The No. 3 gear 7021 is then driven to rotate by the meshing with the No. 4 gear 7022. When the No. 4 gear 7022 rotates, it is meshed with one of the No. 2 gears 7018 to drive one of the No. 2 gears 7018 to rotate. Under the existence of the No. 3 transmission chain 7019, the two No. 2 gears 7018 rotate synchronously in the same direction; When the second gear 7018 rotates, the second transmission rod 7012 is driven to rotate through the third bevel gear set 7013, and the second transmission rod 7012 drives the third transmission shaft 7010 to rotate through the second bevel gear set 7011, and then drives the transmission shaft 608 to rotate through the fourth transmission chain 7023. In this process, the first gear 7015 rotates intermittently; 2. When the pusher 7017 cooperates with the second transmission plate 7020, the elastic potential energy of the tension spring 709 is released, the first gear 7015 rotates continuously, and the third gear 7021 is disengaged from the first gear 7015, and the fourth gear 7022 is engaged with the first gear 7015, so as to achieve the effect of changing phase; For example, if the first gear 7015 rotates clockwise, the third gear 7021 meshing with the first gear 7015 rotates counterclockwise, and the third gear 7021 drives the fourth gear 7022 to rotate clockwise, and the third gear 7021 drives the fourth gear 7022 to rotate clockwise. At this time, the fourth gear 7022 is switched from clockwise to counterclockwise by meshing with the first gear 7015, and the corresponding second gear 7018 driven by the fourth gear 7022 will also change due to the change in the direction of the fourth gear 7022. The corresponding embodiment on the transmission shaft 608 is that the transmission shaft 608 rotates in a reverse direction equidistantly and intermittently for a certain number of times and then returns to the initial state; The effect is that the elastic force applied to the oblique member 6 gradually increases and resets after reaching a certain amount.

[0052] The present invention also provides a method for detecting the strength of ejector pins used in the production of automobile lamp injection molds. The method adopts the method for detecting the strength of ejector pins used in the production of automobile lamp injection molds, and comprises the following steps: Step 1: Place the ejector body on the No. 1 slide seat and clamp it with the positioning assembly; Step 2: The first slide and the ejector body are driven to move toward the oblique member by the reciprocating assembly, and cooperate with the oblique member, and the strength of the ejector body is tested by the reaction force of the oblique member given to the oblique member by the guide rod; Step three, adjust the elastic force of the spring by adjusting the assembly, so that the reaction force given by the spring to the inclined member gradually increases, and then the force of each subsequent test on the ejector body will increase, so as to test the strength of the ejector body and the value of the force it can withstand by increasing the force given by the inclined member to the ejector body.

[0053] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0054] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An ejector pin strength detection device for automobile lamp injection mold production, comprising an ejector pin body (3), characterized in that: Also includes: A detection box (1) and a support plate (2) fixed inside the detection box (1); A first slide seat (4), the first slide seat (4) being slidably mounted on the support plate (2), and a positioning component for clamping the ejector body (3) being mounted on the support plate (2); a base (604), the base (604) being fixed on the support plate (2), a slide member (601) being slidably mounted on the base (604) along the length direction, an oblique member (6) being fixed at the end of the slide member (601), the slide member (601) being connected to an adjustable resistance component mounted on the detection box (1); A reciprocating assembly is mounted on the bottom of the support plate (2) and connected to the first slide seat (4), and the reciprocating assembly is also connected to the adjustable resistance assembly via a stepping assembly.

2. The ejector pin strength detection device for automobile lamp injection mold production according to claim 1 is characterized in that: The positioning assembly comprises two clamping blocks (402) arranged opposite to each other, and the two clamping blocks (402) are both slidably mounted on the first slide seat (4); A bidirectional screw rod (403) is rotatably mounted on the No. 1 slide seat (4), and the bidirectional screw rod (403) is threadedly matched with screw holes provided on the two clamping blocks (402). A No. 1 transmission shaft (401) is also rotatably mounted on the No. 1 slide seat (4), and the No. 1 transmission shaft (401) is connected to the bidirectional screw rod (403) via a No. 1 bevel gear set (404). A knob is mounted on one end of the No. 1 transmission shaft (401) away from the No. 1 bevel gear set (404).

3. The ejector pin strength detection device for automobile lamp injection mold production according to claim 2 is characterized in that: Two No. 2 slide seats (5) are also relatively slidably mounted on the support plate (2), and heating elements (501) are fixed on opposite sides of the two No. 2 slide seats (5), and the two heating elements (501) are clearance-matched with the ejector body (3); A transmission slide bar (502) is installed on each of the two No. 2 slide seats (5), and the two transmission slide bars (502) are fixed to the two clamping blocks (402).

4. The ejector pin strength detection device for automobile lamp injection mold production according to claim 3 is characterized in that: The adjustable resistance assembly comprises an adjustment plate (605) slidably mounted on the support plate (2); two guide rods (602) fixed to the slide (601) are slidably mounted on the adjustment plate (605); a spring (603) is sleeved on the guide rod (602); and the spring (603) is located between the adjustment plate (605) and the slide (601); An anti-slip piece (6012) is fixed to the bottom of the sliding piece (601), and the anti-slip piece (6012) cooperates with an anti-slip groove (6010) starting from the base (604); An adjustment component is mounted on the adjustment plate (605), and the adjustment component is connected to the stepping component.

5. The ejector pin strength detection device for automobile lamp injection mold production according to claim 4 is characterized in that: The oblique member (6) comprises a force-bearing block, the force-bearing block is fixed to the sliding member (601), an arc-shaped portion is provided on a side of the force-bearing block away from the sliding member (601), and the arc-shaped portion cooperates with the ejector body (3).

6. The ejector pin strength detection device for automobile lamp injection mold production according to claim 5 is characterized in that: The adjustment assembly comprises a screw rod (606) rotatably mounted on the adjustment plate (605), the screw rod (606) being threadedly matched with a screw hole provided on the base (604), a first transmission rod (607) being axially slidably mounted in the screw rod (606), and the first transmission rod (607) being rotatably connected to the support plate (2); A transmission shaft (608) is also rotatably mounted on the support plate (2), a driving disk (609) is coaxially fixed on the transmission shaft (608), a driven disk (6011) is coaxially fixed on the No. 1 transmission rod (607), the driven disk (6011) cooperates with the driving disk (609), and the transmission shaft (608) is connected to the stepping assembly; The inner wall of the screw rod (606) is provided with a transmission groove, and the transmission groove is slidably matched with a transmission bar fixed on the first transmission rod (607).

7. The ejector pin strength detection device for automobile lamp injection mold production according to claim 2 is characterized in that: The reciprocating assembly comprises a transmission disc (7) rotatably mounted on the bottom of the support plate (2); a ratchet plate (702) fixed to a No. 1 slide seat (4) is also mounted on the bottom of the support plate (2); a No. 1 transmission plate (701) is rotatably mounted on a deflection portion of the transmission disc (7); the No. 1 transmission plate (701) is rotatably connected to the ratchet plate (702).

8. The ejector pin strength detection device for automobile lamp injection mold production according to claim 7 is characterized in that: The stepping assembly comprises a mounting groove formed at the bottom of the support plate (2), a first ratchet wheel (703) cooperating with the pawl plate (702) being rotatably mounted in the mounting groove, a second transmission shaft (705) being rotatably mounted in the mounting groove, and the second transmission shaft (705) and the first ratchet wheel (703) being connected via a first transmission chain (706); An incomplete gear (708) is also rotatably mounted on the bottom of the support plate (2); the incomplete gear (708) is connected to the second transmission shaft (705) via a second transmission chain (707); and the incomplete gear (708) is also connected to the transmission shaft (608) via a progressive reset assembly.

9. The ejector pin strength detection device for automobile lamp injection mold production according to claim 8, characterized in that: The progressive reset assembly comprises a second ratchet wheel (704) rotatably mounted on the bottom of the support plate (2), a first gear wheel (7015) being coaxially fixed on the rotating shaft of the second ratchet wheel (704), and the first gear wheel (7015) being matched with the incomplete gear wheel (708); A support frame (7016) is also fixed at the bottom of the support plate (2), a second transmission plate (7020) is rotatably mounted on the support frame (7016), a third gear (7021) and a fourth gear (7022) that cooperate with the first gear (7015) are rotatably mounted on the second transmission plate (7020), and a pusher (7017) that cooperates with the second transmission plate (7020) is also fixed on the rotating shaft of the second ratchet wheel (704); Two No. 2 gears (7018) cooperating with the No. 4 gear (7022) are rotatably mounted on the side of the No. 4 gear (7022) away from the No. 3 gear (7021), and the two No. 2 gears (7018) are connected via a No. 3 transmission chain (7019); A third transmission shaft (7010) is also rotatably mounted on the bottom of the support plate (2), and the third transmission shaft (7010) is connected to the transmission shaft (608) via a fourth transmission chain (7023). A second transmission rod (7012) is also rotatably mounted on the bottom of the support plate (2), and the second transmission rod (7012) is connected to the third transmission shaft (7010) via a second bevel gear set (7011), and the second transmission rod (7012) is also connected to the rotating shaft of one of the second gears (7018) via a third bevel gear set (7013); A tension spring (709) is rotatably mounted at an eccentric position of the second ratchet wheel (704), and the other end of the tension spring (709) is rotatably connected to the support plate (2); A limiting pawl (7014) cooperating with the second ratchet wheel (704) is also installed at the bottom of the support plate (2).

10. A method for detecting the strength of ejector pins used in the production of automobile lamp injection molds, using the ejector pin strength detection device used in the production of automobile lamp injection molds as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Place the ejector body (3) on the first slide seat (4) and clamp and fix it by the positioning assembly; Step 2: driving the first slide seat (4) and the ejector body (3) toward the inclined member (6) through the reciprocating assembly and cooperating with the inclined member (6), and testing the strength of the ejector body (3) by applying a reaction force to the inclined member (6) through the guide rod (602); Step three, adjusting the elastic force of the spring (603) by means of the adjusting assembly, thereby gradually increasing the reaction force exerted by the spring (603) on the inclined member (6), and thereby increasing the force exerted on the ejector body (3) each time thereafter, so that the strength of the ejector body (3) and the value of the force that can be exerted can be tested by increasing the force exerted by the inclined member (6) on the ejector body (3).

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