Double-cylinder type pneumatic switching mechanism

Abstract

The utility model relates to the field of stamping die switching mechanisms, in particular to a double-air-cylinder type pneumatic switching mechanism which comprises a sliding block, a driving block, a base plate, a side face air cylinder and a top air cylinder, and a piston rod of the side face air cylinder is connected with the driving block and used for driving the driving block to move left and right. A piston rod of the top air cylinder is connected with the sliding block and used for driving the sliding block to move up and down. Compared with a traditional switching mechanism, the sliding block is driven by the driving block to move through the wedge structure, and therefore the movement stroke of the sliding block is limited, and the stroke selection range is small. Wedge-shaped push-pull conversion does not exist in the transverse direction, the sliding block is directly pushed and pulled through the top air cylinder, the stroke of the sliding block is determined by the length of a piston rod of the top air cylinder, and the stroke selection range is large. Besides, the space is compact, the size is reduced, and therefore the technical problems that an existing switching mechanism is small in stroke selection range, large in occupied space and high in manufacturing cost can be solved.

Description

Technical Field

[0001] The utility model relates to the field of stamping die switching mechanisms, in particular to a double-cylinder pneumatic switching mechanism. Background Art

[0002] In stamping dies, some vehicle models require optional cover parts, which is generally achieved through a switching mechanism. In the die design, a pneumatic switching mechanism with inserts is used in key locations. The inserts on this mechanism are controlled by air circuits, and the inserts are used to participate in or not participate in the stamping process, so that one set of dies can produce two or more corresponding stamping parts.

[0003] Existing pneumatic switching mechanisms typically utilize a wedge-shaped design between the drive block and the slider to achieve the up-and-down movement of the slider, thereby controlling whether the insert mounted on the slider participates in the stamping process. The angle of the wedge is typically 20° to 40°. Due to this limitation, the travel of this switching mechanism is generally less than 30mm, making it unsuitable for switching requirements with a travel greater than 30mm. Furthermore, this switching mechanism is large in size, occupies a large space, and is costly to manufacture. Utility Model Content

[0004] The purpose of the utility model is to provide a double-cylinder pneumatic switching mechanism, which can solve the technical problems of the existing switching mechanism, such as small stroke selection range, large occupied space and high manufacturing cost.

[0005] To achieve the above-mentioned purpose, the utility model designs a dual-cylinder pneumatic switching mechanism, including a slider, a driving block, a pad, a side cylinder, and a top cylinder. The driving block and the slider are arranged on the pad in sequence from top to bottom; the side cylinder is arranged on the side of the pad, and the piston rod of the side cylinder is connected to the driving block; the top cylinder is arranged on the top of the pad, and the piston rod of the top cylinder is connected to the slider.

[0006] As a preferred solution, an upper slide groove is provided on the top of the slider, and the side of the upper slide groove is an upper support part; a lower slide groove is provided on the bottom of the driving block, and the side of the lower slide groove is a lower support part; the size of the upper slide groove matches that of the lower support part, and the size of the lower slide groove matches that of the upper support part.

[0007] Furthermore, a self-locking structure is provided at the joint between the upper support portion and the lower support portion.

[0008] Furthermore, an upper boss extends from the top of the upper support portion into the upward sliding groove, and a lower boss extends from the bottom of the lower support portion into the downward sliding groove. The self-locking structure is a hook limiting structure formed when the upper boss cooperates with the lower boss.

[0009] As a preferred solution, the cylinder diameter of the side cylinder is smaller than the cylinder diameter of the top cylinder.

[0010] As a preferred solution, the dual-cylinder pneumatic switching mechanism further includes an upper slider, which is arranged on the slider and is connected to the slider and the top cylinder connecting rod by screws.

[0011] As a preferred solution, the dual-cylinder pneumatic switching mechanism further includes an outer frame, which is arranged on the backing plate. The interior of the outer frame is a hollow structure, and the slider and the driving block are both arranged in the cavity of the outer frame.

[0012] Beneficial effects of the utility model:

[0013] The present invention provides a dual-cylinder pneumatic switching mechanism, in which cylinders are respectively provided on the side and bottom of the pad. The piston rod of the side cylinder is connected to the drive block to drive the left and right movement of the drive block; the piston rod of the top cylinder is connected to the slider to drive the up and down movement of the slider. Compared with the traditional switching mechanism, the movement of the slider is driven by the drive block through the inclined wedge structure. Therefore, the movement stroke of the slider is limited and the stroke selection range is small. In addition, the drive block drives the slider to slide, which increases the wear between the slider and the drive block and reduces the service life of the mechanism. However, the present invention does not have a wedge-shaped push-pull conversion in the horizontal direction. The slider is directly pushed and pulled by the top cylinder. The slider stroke is determined by the length of the piston rod of the top cylinder, and the stroke selection range is larger. The slider is directly pushed and pulled by the top cylinder, and the switching speed is faster. It can also reduce the wear between the slider and the drive block and increase the service life of the mechanism.

[0014] In addition, the utility model has a compact space and reduced size. By using the switching mechanism, mold costs and mold cycles can be reduced. Therefore, the utility model can solve the technical problems of the existing switching mechanism with a small range of stroke selection, large space occupation and high manufacturing cost.

[0015] In addition, the utility model can also realize self-locking when the air is cut off. The retraction state of the switching mechanism is self-locking. The cylinder does not push or pull, and the mechanism will not change position due to environmental vibration. It can also meet the needs of stamping parts with air-cut working requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is an isometric view of the present invention.

[0017] Figure 2 It is the main sectional view of the present utility model.

[0018] Figure 3 Schematic diagram of the matching status of the slider and the driving block.

[0019] Description of reference numerals:

[0020] Upper slider 01, outer frame 02, pad 03, side cylinder 04, top cylinder 05, slider 06, drive block 07, cylinder connecting rod 08, drive connecting block 09, upper slide groove 10, upper support part 11, upper boss 12, lower slide groove 13, lower support part 14, lower boss 15. DETAILED DESCRIPTION

[0021] To make the technical problems solved, the technical solutions adopted, and the technical effects achieved by the present invention more clearly understood, the technical solutions of the present invention are further described below with reference to the accompanying drawings and through specific embodiments. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of it.

[0022] 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., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate 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. The terms "first position" and "second position" refer to two different positions.

[0023] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed or detachable connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0024] To address the limited range of stroke selection, large space requirements, and high manufacturing costs associated with existing switching mechanisms, the present invention provides a dual-cylinder pneumatic switching mechanism. Cylinders are positioned on the side and bottom of a backing plate. The piston rods of the side cylinders are connected to the drive block, driving its left and right movement. The piston rods of the top cylinders are connected to the slider, driving its up and down movement. Compared to conventional switching mechanisms, where the slider is driven by the drive block via an inclined wedge structure, the slider's travel is limited and the range of stroke selection is narrow. The present invention, however, eliminates the need for a lateral wedge-type push-pull conversion. Instead, the top cylinder directly pushes and pulls the slider, and the slider's stroke is determined by the length of the top cylinder's piston rod, resulting in a wider range of stroke selection. Furthermore, the direct push-pull operation of the slider by the top cylinder allows for faster switching speeds, reduces wear between the slider and the drive block, and increases the mechanism's service life. Furthermore, the present invention offers a compact design, reduced size, and low manufacturing costs. Furthermore, the present invention implements a self-locking mechanism when the switching mechanism is in its retracted state. The cylinders are not pushing or pulling, and the mechanism remains positionally stable due to environmental vibrations. This mechanism can also meet the needs of stamping parts requiring a self-locking mechanism.

[0025] The utility model relates to a double-cylinder pneumatic switching mechanism, comprising an upper slider 01, an outer frame 02, a slider 06, a driving block 07, a pad 03, a side cylinder 04, and a top cylinder 05. The driving block 07 and the slider 06 are arranged on the pad 03 in sequence from top to bottom; the side cylinder 04 is arranged on the side of the pad 03, and the piston rod of the side cylinder 04 is connected to the driving block 07; the top cylinder 05 is arranged on the top of the pad 03, and the piston rod of the top cylinder 05 is connected to the slider 06.

[0026] The diameter of the side cylinder 04 is smaller than that of the top cylinder 05. When the cylinders are ventilated, the slider moves longitudinally first due to the greater force of the bottom large cylinder. When the longitudinal stroke is completed, the small side cylinder pushes the slider upward, making the longitudinal switching stroke longer.

[0027] The upper slider 01 is arranged on the slider 06 , and the upper slider 01 is connected to the slider 06 and the connecting rod of the top cylinder 05 by screws.

[0028] The outer frame is arranged on the pad 03 , and the interior of the outer frame is a hollow structure. The slider 06 and the driving block 07 are both arranged in the cavity of the outer frame.

[0029] The top of the slider 06 is provided with an upper groove 10, flanked by an upper support 11. The bottom of the driving block 07 is provided with a lower groove 13, flanked by a lower support 14. The upper groove 10 and the lower support 14 match in size, and the lower groove 13 matches the upper support 11. A self-locking mechanism is provided at the interface between the upper and lower supports 11, 14. An upper boss 12 extends upward from the top of the upper support 11 into the groove 10, while a lower boss 15 extends downward from the bottom of the lower support 14 into the groove 13. The self-locking mechanism forms a hook-restricting structure when the upper and lower bosses 12 and 15 engage.

[0030] The utility model uses a double-cylinder structure. The double-cylinder movement is not a wedge-shaped structure. The lateral length is reduced, and the overall length of the mechanism is reduced to save mold space. The lateral part is a small-diameter cylinder, and the bottom part is a large-diameter cylinder. When the cylinders are ventilated, the slider first moves longitudinally because the large-diameter cylinder at the bottom has greater power. When the longitudinal stroke is completed, the small cylinder on the side pushes the slider upward to lengthen the longitudinal switching stroke. The longitudinal switching stroke of the slider is determined by the length of the piston rod of the top cylinder and is not limited by the angle of the wedge. That is, the top cylinder directly pushes the slider up and down, rather than relying on the lateral cylinder to drive the drive block to slide the slider up and down. Therefore, the longitudinal switching stroke can reach 30-70mm.

[0031] The two cylinders can be energized simultaneously for synchronized movement, or energized sequentially for separate movement. During synchronized movement, the side cylinder moves slightly ahead to unlock the mechanism. A speed control valve can be used to control the synchronization of the two cylinders. During separate movement, the side cylinder moves first to unlock the mechanism, and then the top cylinder energizes, causing slider 06 to lift the upper slider 01 upward.

[0032] The slider that moves up and down and the driving block that moves left and right form a hook restriction structure when they retract to prevent the horizontal slider from sliding due to mold vibration after air is cut off, causing the slider on the mechanism to slide downward and cause switching failure.

[0033] like Figure 1 、 2 Figure 1 shows the installation of the pneumatic switching mechanism in the mold. Unlike conventional wedge-shaped structures, the drive block 07 of this utility model is located above the slider 06, with a vertical cylinder mounted on top. The stamping insert is used in the mold and fully mounted on the mounting surface of the switching mechanism, namely the upper slider 01. Slider 06 is screwed to the upper slider 01 and is pushed up and down by the top cylinder 05. After slider 06 is pushed downward, the side cylinder 04 pushes the drive block 07 to slide leftward, at which point the upper slider 01 is fully raised and participates in the stamping operation.

[0034] The slider 06 and the driving block 07 are in surface contact. When the side cylinder 04 and the top cylinder 05 are cut off from air, the side cylinder 04 slides to the right and the slider 06 slides upward. At this time, the switching mechanism is in a retracted state, and the upper slider 01 installed above does not participate in stamping in this state.

[0035] Figure 3 The self-locking structure at the joint between the slider 06 and the drive block 07 is self-locking when the switching mechanism retracts. After the air is cut off, the top cylinder stops pushing or pulling, the slider does not change position due to environmental vibration, and the slider 06 does not fall, posing a safety hazard. The upper support portion 11 has an upper boss 12 extending from the bottom of the upward chute 10, and the lower boss 15 extends from the top of the lower support portion 14 into the downward chute 13. The self-locking structure is a hook-restricting structure formed when the upper boss 12 and the lower boss 15 cooperate. The width of the upper chute 10 is slightly larger than the width of the lower support portion 14, and the width of the lower chute 13 is slightly larger than the width of the upper support portion 11, leaving clearance for the mechanism to unlock.

[0036] In addition, the vertical cylinder can also be arranged at the bottom of the pad, and the piston rod of the vertical cylinder is still connected to the slider. At this time, the slider 06 is located above the driving block 07, but the driving block 07 only plays the role of supporting the slider 06 and limiting the position, and the up and down movement of the slider 06 is driven by the vertical cylinder.

[0037] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A dual-cylinder pneumatic switching mechanism, characterized in that: The invention comprises a slider (06), a driving block (07), a pad (03), a side cylinder (04), and a top cylinder (05), wherein the driving block (07) and the slider (06) are sequentially arranged on the pad (03) from top to bottom; the side cylinder (04) is arranged on the side of the pad (03), and the piston rod of the side cylinder (04) is connected to the driving block (07); the top cylinder (05) is arranged on the top of the pad (03), and the piston rod of the top cylinder (05) is connected to the slider (06).

2. A dual-cylinder pneumatic switching mechanism according to claim 1, characterized in that: The top of the slider (06) is provided with an upper slide groove (10), and the side of the upper slide groove (10) is an upper support part (11); the bottom of the driving block (07) is provided with a lower slide groove (13), and the side of the lower slide groove (13) is a lower support part (14); the size of the upper slide groove (10) matches that of the lower support part (14), and the size of the lower slide groove (13) matches that of the upper support part (11).

3. The dual-cylinder pneumatic switching mechanism according to claim 2, characterized in that: A self-locking structure is provided at the matching position of the upper support portion (11) and the lower support portion (14).

4. The dual-cylinder pneumatic switching mechanism according to claim 3, characterized in that: The top of the upper support portion (11) extends an upper boss (12) into the upward sliding groove (10), and the bottom of the lower support portion (14) extends a lower boss (15) into the downward sliding groove (13). The self-locking structure is a hook limiting structure formed when the upper boss (12) and the lower boss (15) cooperate.

5. The dual-cylinder pneumatic switching mechanism according to claim 1, characterized in that: The cylinder diameter of the side cylinder (04) is smaller than the cylinder diameter of the top cylinder (05).

6. The dual-cylinder pneumatic switching mechanism according to claim 1, characterized in that: The dual-cylinder pneumatic switching mechanism further comprises an upper slider (01), which is arranged on a slider (06), and the upper slider (01) is connected to the slider (06) and the connecting rod of the top cylinder (05) via screws.

7. The dual-cylinder pneumatic switching mechanism according to claim 1, characterized in that: The double-cylinder pneumatic switching mechanism further comprises an outer frame, which is arranged on the backing plate (03). The interior of the outer frame is a hollow structure, and the slider (06) and the driving block (07) are both arranged in the cavity of the outer frame.

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