Forced rollback switching mechanism

Abstract

The utility model relates to the technical field of stamping die switching mechanisms, in particular to a forced rollback switching mechanism which comprises an air cylinder, a driving block, a sliding block and a back-off mechanism, the driving block is connected with a movable part of the air cylinder, and the driving block reciprocates in the horizontal direction under the action of the air cylinder; the back-off mechanism is arranged in the vertical direction, the bottom of the back-off mechanism is installed on the sliding block, and the top of the back-off mechanism extends upwards into the driving block. The sliding block is located below the driving block and connected with the driving block in a sliding mode, and the sliding block reciprocates in the vertical direction under the action of the driving block and the back-off mechanism. The utility model has the advantages of reliable reset and convenient installation. The forced reset mechanism avoids the fatigue problem of a traditional spring, and the reset success rate is high; and the reversing mechanism and the nitrogen spring provide double guarantees, so that the sliding block is prevented from falling off and the return stroke of the sliding block is assisted. The sliding block resetting mechanism can solve the technical problems of low resetting reliability and insufficient stability of the sliding block of a traditional switching mechanism.

Description

Technical Field

[0001] This utility model belongs to the technical field of stamping die switching mechanism, specifically relating to a forced retraction switching mechanism. Background Technology

[0002] A pneumatic switching mechanism is an automated device that uses pneumatic drive to switch positions, states, or functions. Its core function is to improve efficiency, enhance control accuracy, and adapt to complex working conditions. By using pneumatic actuators (such as cylinders) to drive mechanical components to quickly switch states, switching time can be significantly reduced. Therefore, pneumatic switching mechanisms are widely used in stamping dies.

[0003] Traditional switching mechanisms typically include a fixed base, a slider, a drive block, a cylinder, and a return spring. The slider is movably positioned above the drive block, while the cylinder is arranged laterally on the side of the drive block. Because the slider's return stroke relies on a single return spring, it is prone to jamming or falling after prolonged use. Furthermore, the lack of a forced return design in the return spring makes it susceptible to slider reset failure due to inertia or friction. Therefore, traditional switching mechanisms suffer from low slider reset reliability and insufficient stability. Utility Model Content

[0004] The purpose of this invention is to provide a forced retraction switching mechanism that can solve the technical problems of low reliability and insufficient stability of slider reset in traditional switching mechanisms.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] This utility model discloses a forced retraction switching mechanism, including a cylinder, a drive block, a slider, and a buckling mechanism. The drive block is connected to the movable part of the cylinder and reciprocates horizontally under the action of the cylinder. The buckling mechanism is arranged vertically, with its bottom mounted on the slider and its top extending upward into the interior of the drive block. The slider is located below the drive block and is slidably connected to it. The slider reciprocates vertically under the action of the drive block and the buckling mechanism.

[0007] As a preferred embodiment, the undercut mechanism includes an undercut block and a linkage device. The undercut block includes an undercut portion, a mounting portion, and a connecting portion. The undercut portion is located inside the drive block. The linkage device is connected to the side of the undercut portion. The mounting portion is disposed on the slider. The connecting portion is used to connect the undercut portion and the mounting portion.

[0008] As a preferred embodiment, the slider includes an upper slider and a lower slider connected to each other. The upper slider is slidably connected to the drive block, and the lower slider is located below the upper slider. The upper end of the upper slider is provided with a sliding part that cooperates with the drive block. The left side of the upper slider is provided with a movable groove, and the connecting part of the undercut block is located in the movable groove. The upper end of the lower slider is provided with a mounting groove, and a nitrogen gas groove is provided inside. The mounting part of the undercut block is set in the mounting groove, and the reset nitrogen spring is set in the nitrogen gas groove.

[0009] As a preferred embodiment, the drive block includes a body, a drive part, and a limiting part. The left side of the body is provided with a clearance groove corresponding to the movable groove. The limiting part is located at the end of the clearance groove. The undercut part of the undercut block is located in the clearance groove and cooperates with the limiting part. The drive part is located below the body and cooperates with the sliding part.

[0010] As a preferred embodiment, the switching mechanism further includes a base located above the drive block. The cylinder is mounted on the base, and the side of the cylinder is connected to the side of the drive block via a cylinder connecting plate. A stroke hole is provided on the base, and the cylinder connecting plate passes through the middle of the stroke hole in a vertical direction.

[0011] As a preferred embodiment, the switching mechanism further includes a reset nitrogen spring, which is disposed vertically inside the slider.

[0012] The beneficial effects of this utility model are:

[0013] This invention provides a forced return switching mechanism, which has the advantages of reliable reset and convenient installation. The slider reset reliability is high: the forced reset mechanism avoids the fatigue problem of traditional springs, achieving a 100% reset success rate; the slider stability is high: the built-in reset nitrogen spring provides double protection, preventing the slider from falling off and assisting the slider's return stroke. Therefore, this invention can solve the technical problems of low slider reset reliability and insufficient stability in traditional switching mechanisms. Attached Figure Description

[0014] Figure 1 This is a schematic cross-sectional view of the slider in the lifting state;

[0015] Figure 2 This is a schematic diagram of the slider's retracted state.

[0016] Figure 3 This is a partial three-dimensional schematic diagram of the pneumatic switching mechanism;

[0017] Figure 4 This is a schematic diagram of a partial explosion of the pneumatic switching mechanism.

[0018] Explanation of reference numerals in the attached figures:

[0019] 1-Cylinder; 12-Cylinder connecting plate; 13-Cylinder connecting rod; Mounting seat 2; 20-L angle iron;

[0020] Base structure: 30-base, 31-stroke hole;

[0021] Sliding structure: 5-lower slider (51-mounting groove, 52-nitrogen tank); 9-upper slider (91-movable groove, 92-sliding part);

[0022] Drive structure: 10-Drive block, 11-Body, 12-Drive part, 13-Limiting part, 14-Allowing groove;

[0023] Inverted structure: 3-Inverted mechanism; 6-Inverted block (61-Inverted part, 62-Mounting part, 63-Connecting part). Detailed Implementation

[0024] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.

[0025] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Specifically, the terms "first position" and "second position" refer to two different positions.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] This utility model belongs to the field of mechanical design technology, specifically relating to a forced retraction switching mechanism, particularly suitable for mold environments with compact lateral space. Addressing the problems in the background art, this utility model aims to provide a solution with a compact lateral space structure, reliable resetting, and convenient installation, as detailed below:

[0028] 1) By optimizing the cylinder layout and mounting structure, the lateral space occupied by the switching mechanism is significantly reduced;

[0029] 2) A forced reset design is adopted to ensure the reliability of the reset action of the buckling mechanism;

[0030] 3) The slider integrates a reset nitrogen spring and a borrow space design to improve slider stability;

[0031] 4) The fixed base has an outer frame stepped structure on the side to simplify the mold connection process and reduce the space volume.

[0032] This utility model provides a forced retraction switching mechanism, including a cylinder 1, a drive block 10, a slider, a buckling mechanism 3, a base 30, and a reset nitrogen spring. The drive block 10 is connected to the movable part of the cylinder 1, and the drive block 10 reciprocates horizontally under the action of the cylinder 1. The buckling mechanism 3 is arranged vertically, with its bottom mounted on the slider and its top extending upward into the drive block 10. The slider is located below the drive block 10 and is slidably connected to the drive block 10. The slider reciprocates vertically under the action of the drive block 10 and the buckling mechanism 3. The reset nitrogen spring is arranged vertically inside the slider.

[0033] The undercut mechanism 3 includes an undercut block 6 and a linkage device. The undercut block 6 includes an undercut part 61, a mounting part 62, and a connecting part 63. The undercut part 61 is located inside the drive block 10. The linkage device is connected to the side of the undercut part 61. The mounting part 62 is disposed on the slider. The connecting part 63 is used to connect the undercut part 61 and the mounting part 62.

[0034] The slider includes an upper slider 9 and a lower slider 5 connected to each other. The upper slider 9 is slidably connected to the driving block 10, and the lower slider 5 is located below the upper slider 9. The upper end of the upper slider 9 is provided with a sliding part 92 that cooperates with the driving block 10. The left side of the upper slider 9 is provided with a movable groove 91, and the connecting part 63 of the undercut block 6 is located in the movable groove 91. The upper end of the lower slider 5 is provided with a mounting groove 51, and a nitrogen groove 52 is provided inside. The mounting part 62 of the undercut block 6 is set in the mounting groove 51, and the reset nitrogen spring is set in the nitrogen groove 52.

[0035] The drive block 10 includes a body 11, a drive part 12, and a limiting part 13. The left side of the body 11 is provided with a relief groove 14 corresponding to the movable groove 91. The limiting part 13 is located at the end of the relief groove 14. The undercut part 61 of the undercut block 6 is located in the relief groove 14 and cooperates with the limiting part 13. The drive part 12 is located below the body 11 and cooperates with the sliding part 92.

[0036] The base 30 is located above the drive block 10. The cylinder 1 is mounted on the base 30. The side of the cylinder 1 is connected to the side of the drive block 10 through the cylinder 1 connecting plate. The base 30 has a stroke hole 31. The cylinder 1 connecting plate passes through the middle of the stroke hole 31 in the vertical direction.

[0037] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0038] like Figures 1 to 2 As shown, the pneumatic switching mechanism includes the following core components: cylinder, L-shaped fixed seat, inverted mechanism, reset nitrogen spring, upper slider, lower slider, drive block, L-angle iron, cylinder connecting plate, cylinder connecting rod, and pad.

[0039] Cylinder assembly: The cylinder assembly includes a cylinder 1, a cylinder connecting plate 12, and a cylinder connecting rod 13. One end of the cylinder connecting rod 13 is connected to the cylinder 1, and the other end is connected to the cylinder connecting plate 12. The cylinder connecting plate 12 is arranged vertically, and its upper end is connected to the drive block 10.

[0040] Longitudinal cylinder mounting: The cylinder is vertically mounted on the top of the base, with the cylinder, drive block, and slider in the same direction, reducing the space occupied by the switching mechanism in the length direction. Generally, in switching mechanisms, the cylinder and drive seat are in the same direction, while the slider is arranged perpendicularly to the drive seat, thus the switching mechanism occupies a large space in the length direction. The cylinder 1 is fixed to the top of the L-shaped fixed base 2 using two L-shaped angle irons 20 and bolted together to ensure horizontal movement. Alternatively, the cylinder 1 can be mounted on the side of the L-shaped fixed base 2 in the width direction, adjusting its position according to the mold space.

[0041] Fixing base: Adopting an L-shaped integrated structure, reducing lateral space requirements while enhancing overall rigidity. The outer frame edge of the fixing base is equipped with stepped bosses for screw holes and locating pin holes, enabling quick and precise connection with the mold. The L-shaped fixing base 2 is integrally formed from high-strength steel with an internal cavity structure. Its short side connects to the cylinder 1, and its long side is fixed to the outer frame of the mold via pins.

[0042] Internal layout of the L-shaped fixing seat: The lower slider 5 and the upper slider 9 are installed in the internal cavity of the L-shaped fixing seat 2. The lower slider 5 and the upper slider 9 are connected by screws, and the two sliders are guided through the internal cavity of the L-shaped fixing seat 2. In addition, the drive block 10 can reciprocate horizontally within the internal cavity of the L-shaped fixing seat 2. The drive block 10 is connected to the cylinder through the cylinder connecting plate 12 and the cylinder connecting rod 13, thereby transmitting the power provided by the cylinder. The lower slider 5 and the upper slider 9 are connected by screws to form a whole. The undercut mechanism 3 is fixed to the lower slider 5 by screws. The undercut mechanism 3 has clearance fit with the upper slider 9 and the drive block 10 respectively, and the upper slider 9 has sliding fit with the drive block 10.

[0043] Screw holes 7 and positioning pin holes 8 are provided on the outer frame steps of the fixed seat. During installation, the stepped surface fits against the mold surface to ensure connection accuracy and further reduce the space occupied by the switching mechanism in the mold. Since the fender part is C-shaped, the process of adding a charging port opening in the mold needs to avoid the reinforcing rib of the pressure core, and the space requirements are very strict. This switching mechanism can avoid the fender pressure core, and the structure is more compact. While not damaging the structure of the pressure core and the strength of the mold, it can ensure the normal operation of the switching function, thereby meeting the purpose of realizing the overall function of the mold and achieving the maximum application value.

[0044] A reset nitrogen spring is installed inside the slider: the reset nitrogen spring 4 is embedded inside the lower slider 5, using the groove on the side wall of the lower slider 5 as a buffer space. One end of the reset nitrogen spring 4 is connected to the lower slider 5, and the other end is fixed to the L-shaped fixing seat 2 to provide reset force. The reset nitrogen spring is installed inside the slider using its own buffer space as a nitrogen buffer device, which not only assists its return stroke but also prevents the slider from falling.

[0045] like Figure 3 , 4 As shown, the reverse mechanism is forced to reset: The reverse mechanism includes a reverse block and a mechanical linkage device (such as a cam or lever). The reverse block achieves forced reset of the slider through the mechanical linkage device, and can also prevent the slider from falling during the reset process. This avoids excessive reliance on nitrogen spring reset and can improve the service life and stability of the pneumatic switching mechanism.

[0046] The lower slider 5 and the upper slider 9 are connected by screws to form a whole. The forced reset buckle mechanism 3 is fixed to the lower slider 5 by screws. During the return stroke, the slider as a whole is linked with the cylinder piston rod through the forced reset buckle mechanism 3. When the cylinder 1 extends, it pushes the buckle to unlock. When it retracts, it is forced to reset through the cam inclined surface, thus completing the action of the forced reset mechanism.

[0047] Slider lifting process:

[0048] Cylinder 1 retracts to the left, causing cylinder connecting rod 13 to move to the left, which in turn causes cylinder connecting plate 12 and drive block 10 to move to the left. Drive block 10 and upper slider 9 are connected by inclined sliding engagement. Under normal circumstances, upper slider 9 and lower slider 5 move downward together under the push of inverted mechanism 3 and reset nitrogen spring 4 until the bottom plane of drive block 10 contacts the top plane of upper slider 9. Drive block 10 then holds upper slider 9 to stop its downward movement. At the same time, inverted mechanism 3 and lower slider 5 also stop their downward movement. If reset nitrogen spring 4 fails and cannot push upper slider 9 and lower slider 5 downward, the inverted block will continue to drive upper slider 9 and lower slider 5 downward under the action of linkage device (such as cam or lever) to complete the lifting action until the bottom plane of drive block 10 contacts the top plane of upper slider 9. Drive block 10 then holds upper slider 9 and lower slider 5 to stop their downward movement, thus achieving the purpose of inverted mechanism 3 forcibly lifting the slider. After that, the drive block 10 continues to move to the left to its limit position under the action of the cylinder 1. At this time, the bottom plane of the drive block 10 is completely aligned with the top plane of the upper slider 9, and the slider lifting process is completed.

[0049] Slider retraction process:

[0050] Cylinder 1 extends to the right, causing cylinder connecting rod 13 to move to the right, which in turn causes cylinder connecting plate 12 and drive block 10 to move to the right until the inclined surface of drive block 10 just contacts the inclined surface of upper slider 9, at which point the thrust of drive block 10 on upper slider 9 disappears. Under normal circumstances, the upper slider 9 and the lower slider 5 move upward under the action of the inverted mechanism 3 and the reset nitrogen spring 4. At this time, if the reset nitrogen spring 4 fails and cannot push the upper slider 9 and the lower slider 5 to move upward, the inverted block will unlock under the action of the linkage device (such as a cam or lever) and continue to drive the upper slider 9 and the lower slider 5 to move upward so that they retract, thereby achieving the purpose of the inverted mechanism 3 forcibly driving the slider to retract. The inverted part on the inverted block cooperates with the limiting part at the end of the drive block 10 to play a limiting role, restricting the drive block 10 from moving to the right alone during this process, thereby ensuring that the drive block 10 moves to the right and the upper slider 9 and the lower slider 5 move upward synchronously, until the drive block 10 continues to move to the right to the limit position and the upper slider 9 and the lower slider 5 move to the limit position of upward movement, at which point the slider retraction process is completed.

[0051] In this invention, the inverted mechanism 3 and the reset nitrogen spring 4 both serve to lift and reset the slider. They can be used individually or together, providing dual protection.

[0052] This utility model has the following advantages compared to the prior art:

[0053] (1) High space utilization: The cylinder is installed longitudinally and combined with the L-shaped fixed seat, which reduces the overall volume by more than 30%;

[0054] (2) High reset reliability: The forced reset mechanism avoids the fatigue problem of traditional springs, and the reset success rate reaches 100%;

[0055] (3) Improved slider stability: The built-in reset nitrogen spring provides double protection to prevent the lower slider from falling off and assists in the return stroke;

[0056] (4) Easy installation: The outer frame step design simplifies the positioning of screws and pins, reducing installation time by 50%.

[0057] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A forced rollback switching mechanism, characterized in that: The device includes a cylinder (1), a drive block (10), a slider, and a buckling mechanism (3). The drive block (10) is connected to the movable part of the cylinder (1), and the drive block (10) reciprocates in the horizontal direction under the action of the cylinder (1). The buckling mechanism (3) is arranged in the vertical direction, with its bottom mounted on the slider and its top extending upward into the interior of the drive block (10). The slider is located below the drive block (10) and is slidably connected to the drive block (10). The slider reciprocates in the vertical direction under the action of the drive block (10) and the buckling mechanism (3).

2. The forced back-off switching mechanism according to claim 1, characterized in that: The undercut mechanism (3) includes an undercut block (6) and a linkage device. The undercut block (6) includes an undercut part (61), a mounting part (62), and a connecting part (63). The undercut part (61) is located inside the drive block (10). The linkage device is connected to the side of the undercut part (61). The mounting part (62) is mounted on the slider. The connecting part (63) is used to connect the undercut part (61) and the mounting part (62).

3. The forced rollback switching mechanism according to claim 2, characterized in that: The slider includes an upper slider (9) and a lower slider (5) connected to each other. The upper slider (9) is slidably connected to the drive block (10), and the lower slider (5) is located below the upper slider (9). The upper end of the upper slider (9) is provided with a sliding part (92) that cooperates with the drive block (10). The left side of the upper slider (9) is provided with a movable groove (91), and the connecting part (63) of the undercut block (6) is located in the movable groove (91). The upper end of the lower slider (5) is provided with a mounting groove (51), and a nitrogen groove (52) is provided inside. The mounting part (62) of the undercut block (6) is set in the mounting groove (51), and the reset nitrogen spring is set in the nitrogen groove (52).

4. The forced back-off switching mechanism according to claim 3, characterized in that: The drive block (10) includes a body (11), a drive part (12), and a limiting part (13). The left side of the body (11) is provided with a clearance groove (14) corresponding to the movable groove (91). The limiting part (13) is located at the end of the clearance groove (14). The undercut part (61) of the undercut block (6) is located in the clearance groove (14) and cooperates with the limiting part (13). The drive part (12) is located below the body (11) and cooperates with the sliding part (92).

5. The forced rollback switching mechanism according to claim 4, characterized in that: The switching mechanism also includes a base (30), which is located above the drive block (10). The cylinder (1) is mounted on the base (30), and the side of the cylinder (1) is connected to the side of the drive block (10) through a cylinder (1) connecting plate. A stroke hole (31) is opened on the base (30), and the cylinder (1) connecting plate passes through the middle of the stroke hole (31) in the vertical direction.

6. The forced rollback switching mechanism according to claim 1, characterized in that: The switching mechanism also includes a reset nitrogen spring, which is disposed vertically inside the slider.

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