Punch safety guard

Abstract

The utility model discloses a punch press safety device, including the fixed seat of punch press frame, the rotary arm of fixed seat rotary connection and set up in the protection module of rotary arm free end, protection module includes: cylinder, with rotary arm's free end fixed connection, piston rod, along the axial sliding setting in the cylinder, and its top end extends to the outside of cylinder, pressure -bearing block, fixed mounting on the top end of piston rod, wherein, the inner wall of cylinder and the bottom of piston rod jointly enclose and form a sealed lower air cavity, and the air inlet hole of cylinder is set up with lower air cavity intercommunication, in the utility model, lower air cavity is connected into compressed air and can drive piston rod and the pressure -bearing block of top lift, has realized the flexible regulation of operation height, to adapt to different operation height.

Description

Technical Field

[0001] This utility model relates to the field of punch press equipment technology, and in particular to a punch press safety protection device. Background Technology

[0002] During punch press processing, the accidental downward movement of the slide poses a significant safety hazard, potentially causing mold damage or even personal injury. Existing safety devices typically employ handheld mechanisms with a fixed height, failing to adapt to varying working height requirements. Therefore, there is an urgent need for a punch press safety device that integrates flexible cushioning, is height-adjustable, and is easy to store. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a safety protection device for punch presses.

[0004] The technical solution of this utility model is as follows: it includes a mounting base fixed on a punch press frame, a rotating arm rotatably connected to the mounting base, and a protective module disposed at the free end of the rotating arm. The protective module includes:

[0005] The cylinder body is connected to the free end of the rotating arm;

[0006] The piston rod is axially slidably disposed within the cylinder body, with its top end extending to the outside of the cylinder body;

[0007] A pressure-bearing block is fixedly installed at the top of the piston rod;

[0008] The inner wall of the cylinder and the bottom of the piston rod together form a sealed lower air chamber, and the cylinder has an air inlet that communicates with the lower air chamber.

[0009] Furthermore: a sleeve is fixedly connected to the free end of the rotating arm, and the cylinder body can be axially inserted into the sleeve; a buffer spring is sleeved on the outer periphery of the cylinder body, and the two ends of the buffer spring respectively abut against the end face of the sleeve and the open flange at the top of the cylinder body.

[0010] Furthermore: the outer peripheral wall of the piston rod is provided with multiple annular toothed grooves spaced along its axial direction; the top of the cylinder is provided with a retaining ring, the inner periphery of which is provided with a toothed structure adapted to the annular toothed grooves, the retaining ring engaging with the annular toothed grooves at selected positions through the toothed structure to lock the piston rod at the required height.

[0011] Furthermore: the retaining ring includes two symmetrical arc-shaped retaining blocks, and after the two arc-shaped retaining blocks are engaged, their engaging ends are fastened together by a connector.

[0012] Furthermore, a sealing ring groove is provided on the outer periphery of the bottom of the piston rod, and an O-ring is embedded in the sealing ring groove. The O-ring is interference-fitted with the inner wall of the cylinder.

[0013] Furthermore, a wear-resistant ring groove is provided on the bottom outer peripheral wall of the piston rod. The wear-resistant ring groove and the sealing ring groove are arranged axially at intervals. A wear-resistant ring that slides in cooperation with the inner wall of the cylinder is embedded in the wear-resistant ring groove.

[0014] Furthermore: the swing arm is a multi-stage foldable linkage swing arm, including a main swing arm and at least one secondary swing arm. One end of the main swing arm is rotatably connected to the mounting base. The main swing arm and each secondary swing arm are sequentially hinged through a pivot assembly. The free end of the last secondary swing arm is fixedly connected to the cylinder block.

[0015] Furthermore: a rotating shaft is rotatably supported inside the mounting base by a bearing, and one end of the rotating arm is fixedly connected to the rotating shaft.

[0016] Furthermore: the outer peripheral wall of the piston rod and the inner wall of the cylinder form an upper air chamber; an annular groove is formed on the end face of the open flange at the top of the cylinder, and the annular groove communicates with the upper air chamber; a connecting flange is provided on the open flange; and a vent hole is provided on the connecting flange to connect the annular groove with the outside air.

[0017] Furthermore, the retaining ring is disposed on the end face of the connecting flange.

[0018] The beneficial technical effects of this utility model are as follows: Compressed air entering the lower air chamber drives the piston rod and the top pressure block to rise and fall, achieving flexible adjustment of the working height to adapt to different working heights. The sleeve and cylinder are fitted with a clearance fit, and a buffer spring is used to create a gap between the bottom of the protective module and the processing table, allowing the protective module to rotate into and out of the working position. Simultaneously, when the punch press slide experiences an accidental downward impact, the open flange compresses the buffer spring during contact between the bottom of the protective module and the processing table, reducing the impact load transmitted to the rotating arm and effectively preventing the rotating arm from bending or being damaged due to overload. Finally, the rotating arm adopts a multi-stage foldable linkage swing arm structure, allowing the entire device to be compactly folded in the non-working state, greatly saving equipment space, while achieving a wide range of spatial displacement in the working state. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model in a non-working state;

[0020] Figure 2 This is a schematic diagram of the overall structure and working state of this utility model;

[0021] Figure 3 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 4 This is a top view of the overall structure of this utility model;

[0023] Figure 5 This is a utility model Figure 4 Schematic diagram of the sectional view along the central AA direction;

[0024] Among them: 1000, punch press frame; 2000, slider;

[0025] 100. Mounting base;

[0026] 200. Swing arm; 201. Main swing arm; 202. Secondary swing arm; 203. Sleeve;

[0027] 300. Protective module; 301. Cylinder body; 302. Piston rod; 303. Pressure block; 304. Lower air chamber; 305. Air inlet; 306. O-ring seal; 307. Wear ring; 308. Annular toothed groove; 309. Snap ring; 310. Upper air chamber; 311. Connecting flange; 312. Annular groove; 313. Vent hole;

[0028] 400. Buffer spring. Detailed Implementation

[0029] In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0030] As shown in Figures 1 and 2, the present invention discloses a safety protection device for a punch press, used for safety protection during punch press operation. It includes a mounting base 100, which is fixedly connected to a punch press frame 1000. The mounting base 100 has an internal mounting cavity containing a rotating shaft. Both ends of the rotating shaft are rotatably supported on the mounting base 100 via bearings, allowing the shaft to rotate relative to the mounting base 100 around its own axis.

[0031] One end of the rotating arm 200 is fixedly connected to the rotating shaft, thus enabling it to rotate together with the shaft. In this embodiment, the rotating arm 200 adopts a multi-stage foldable linkage swing arm, including a main swing arm 201 and several secondary swing arms 202 sequentially hinged via a pivot assembly. One end of the main swing arm 201 is rotatably connected to the mounting base 100, and the free end of the last secondary swing arm 202 is provided with a protective module 300. Through this multi-stage foldable linkage swing arm structure design, the protective module 300 can be folded and retracted in the non-working state for compact storage, and can achieve a large range of spatial displacement in the working state.

[0032] The other end of the rotating arm 200 is a free end, which is equipped with a protective module 300 to withstand impact when the punch press slide 2000 accidentally moves downward.

[0033] As shown in the figures, the protective module 300 employs a buffer cylinder, which includes a cylinder body 301, a piston rod 302 disposed within the cylinder body 301, and a pressure-bearing block 303 disposed on the top of the piston rod 302. A sleeve 203 is fixedly connected to the free end of the rotating arm 200, and the sleeve 203 is fitted around the outer periphery of the cylinder body 301. Several reinforcing ribs are provided between the outer wall of the sleeve 203 and the free end of the rotating arm 200 to enhance the connection strength. The piston rod 302 can move axially within the cylinder body 301, with its top extending to the outside of the cylinder body 301. The pressure-bearing block 303 directly bears the downward impact force from the slider 2000.

[0034] In this embodiment, when the protective module 300 is not in operation, there is a gap between its bottom and the processing table. This gap ensures that when the rotating arm 200 moves the protective module 300 into or out of the working position, the bottom of the protective module 300 will not interfere with the processing table. However, the existence of this gap also brings a problem: when the punch press slide 2000 descends and impacts the protective module 300, it will press it down instantly, causing the bottom of the protective module 300 to contact the processing table. If there is no buffer, the impact load will act directly on the rotating arm 200, causing the rotating arm 200 to undergo rigid bending or structural damage.

[0035] To address the aforementioned issues, this embodiment incorporates a buffer structure between the sleeve 203 and the cylinder 301. Specifically, the sleeve 203 and cylinder 301 are fitted together with a clearance fit, allowing the cylinder 301 to pass axially within the sleeve 203. A buffer spring 400 is also fitted around the outer periphery of the cylinder 301, with both ends of the buffer spring 400 abutting against the end face of the sleeve 203 and the open flange at the top of the cylinder 301, respectively.

[0036] When the punch press slide 2000 descends and impacts the pressure block 303, the pressure block 303 drives the cylinder 301 to move downward, causing the open flange to compress the buffer spring 400. The buffer spring 400 absorbs part of the impact energy through its elastic deformation, converting the instantaneous rigid impact into elastic buffering, thereby significantly reducing the impact load transmitted to the swing arm 200 and effectively preventing the swing arm 200 from bending or being damaged due to overload.

[0037] When the punch press slide 2000 moves upward to release the stamping, the buffer spring 400 returns to its original deformation and pushes the cylinder 301 upward through the open flange, restoring the gap between the bottom of the protective module 300 and the processing table. At this time, the protective module 300 is rotated by the rotating arm 200, returning the protective module 300 to the non-working position.

[0038] In this embodiment, in order to achieve height adjustment of the piston rod 302 and ensure reliable positioning of its working position, a pneumatic drive mechanism is provided at the bottom of the piston rod 302. The pneumatic drive mechanism includes a lower air chamber 304 formed by the cylinder body 301 and the bottom of the piston rod 302. The cylinder body 301 is provided with an air inlet 305 that communicates with an external air source. Compressed air enters the lower air chamber 304 through the air inlet 305, pushing the piston rod 302 to move axially to achieve height adjustment.

[0039] To ensure the sealing performance of the lower air chamber 304, a sealing ring groove is provided on the outer peripheral wall at the bottom of the piston rod 302, and an O-ring seal 306 is embedded in the groove. The O-ring seal 306 forms an interference fit with the inner wall of the cylinder 301, effectively preventing compressed air leakage.

[0040] In addition, a wear-resistant ring groove is formed on the outer peripheral wall of the bottom of the piston rod 302. The wear-resistant ring groove and the sealing ring groove are arranged axially at intervals. A wear-resistant ring 307 is embedded in the wear-resistant ring groove. The wear-resistant ring 307 slides in fit with the inner wall of the cylinder 301 to withstand the radial force generated when the piston rod 302 moves, reduce friction and wear, and extend service life.

[0041] The piston rod 302 has multiple annular grooves 308 evenly spaced axially on its outer peripheral wall. A retaining ring 309 is provided at the opening flange at the top of the cylinder body 301. The inner circumference of the retaining ring 309 has a toothed structure that matches the annular grooves 308. By engaging the toothed structure on the inner circumference of the retaining ring 309 with the annular grooves 308 at selected positions, the piston rod 302 is mechanically locked at the desired height.

[0042] The retaining ring 309 adopts a split structure, including two symmetrical arc-shaped retaining blocks. By engaging the two arc-shaped retaining blocks, the toothed structure of their inner circumferences is embedded into the annular toothed groove 308 at any selected height, and the engaging ends of the two arc-shaped retaining blocks are fastened together by a connector, thus achieving reliable positioning of the piston rod 302.

[0043] The outer peripheral wall of the piston rod 302 and the cylinder body 301 together form an upper air chamber 310. In this embodiment, a connecting flange 311 is also provided between the retaining ring 309 and the open flange, which provides a flat mounting platform for the retaining ring 309. An annular groove 312 is formed on the mounting end face of the open flange facing the connecting flange 311. The annular groove 312 extends radially inward to communicate with the upper air chamber 310. A plurality of vent holes 313 are formed on the connecting flange 311. One end of the vent holes 313 communicates with the outside air, and the other end communicates with the annular groove 312. The annular groove 312 provides a reliable airflow channel for the vent holes 313, so that the upper air chamber 310 is balanced with atmospheric pressure, ensuring smooth adjustment of the piston rod 302.

[0044] In operation, compressed air is introduced into the lower air chamber 304 to drive the piston rod 302, along with the pressure block 303, to rise to the desired working height. Two arc-shaped locking blocks are then engaged from both sides, allowing their inner circumferential toothed structures to embed into the annular toothed groove 308 corresponding to the current height. The two arc-shaped locking blocks are then locked in place via a connector. When the piston rod 302 needs to be lowered, the compressed air in the lower air chamber 304 is released, and the retaining ring 309 is loosened, disengaging its inner circumferential toothed structure from the annular toothed groove 308. The piston rod 302 and pressure block 303 then descend under their own weight. When the piston rod 302 needs to be raised, air is reintroduced into the lower air chamber 304, thus achieving precise adjustment of the protection height of the protection module 300. This cycle repeats continuously, ensuring safety, reliability, and flexible adaptation to different working height requirements of the protection module 300.

[0045] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A safety protection device for a punch press, characterized in that: The device includes a mounting base (100) fixed to a punch press frame (1000), a rotating arm (200) rotatably connected to the mounting base (100), and a protective module (300) disposed at the free end of the rotating arm (200). The protective module (300) includes: The cylinder body (301) is connected to the free end of the rotating arm (200); The piston rod (302) is slidably disposed in the cylinder (301) along the axial direction, and its top end extends to the outside of the cylinder (301); A pressure block (303) is fixedly installed on the top end of the piston rod (302); The inner wall of the cylinder (301) and the bottom of the piston rod (302) together form a sealed lower air chamber (304), and the cylinder (301) is provided with an air inlet (305) that communicates with the lower air chamber (304).

2. The punch press safety protection device according to claim 1, characterized in that: A sleeve (203) is fixedly connected to the free end of the rotating arm (200), and the cylinder (301) can be axially inserted into the sleeve (203); a buffer spring (400) is sleeved on the outer periphery of the cylinder (301), and the two ends of the buffer spring (400) abut against the end face of the sleeve (203) and the open flange at the top of the cylinder (301) respectively.

3. The punch press safety protection device according to claim 1, characterized in that: The piston rod (302) has multiple annular toothed grooves (308) spaced axially on its outer peripheral wall; the top of the cylinder (301) is provided with a retaining ring (309), and the inner periphery of the retaining ring (309) is provided with a toothed structure that matches the annular toothed grooves (308). The retaining ring (309) engages with the annular toothed grooves (308) at a selected position through the toothed structure to lock the piston rod (302) at the required height.

4. A punch press safety protection device according to claim 3, characterized in that: The retaining ring (309) includes two symmetrical arc-shaped retaining blocks. After the two arc-shaped retaining blocks are engaged, their engaged ends are fastened together by a connector.

5. A punch press safety protection device according to claim 1, characterized in that: A sealing ring groove is provided on the outer periphery of the bottom of the piston rod (302), and an O-ring seal (306) is embedded in the sealing ring groove. The O-ring seal (306) is interference-fitted with the inner wall of the cylinder (301).

6. A punch press safety protection device according to claim 5, characterized in that: The piston rod (302) is provided with a wear-resistant ring groove on the bottom outer peripheral wall. The wear-resistant ring groove and the sealing ring groove are arranged axially at intervals. The wear-resistant ring (307) is embedded in the wear-resistant ring groove and slides with the inner wall of the cylinder (301).

7. A punch press safety protection device according to claim 1, characterized in that: The swing arm (200) is a multi-stage foldable linkage swing arm, including a main swing arm (201) and at least one secondary swing arm (202). One end of the main swing arm (201) is rotatably connected to the mounting base (100). The main swing arm (201) and each secondary swing arm (202) are sequentially hinged through a pivot assembly. The free end of the last secondary swing arm (202) is fixedly connected to the cylinder block (301).

8. A punch press safety protection device according to claim 1, characterized in that: The mounting base (100) has a rotating shaft rotatably supported inside by a bearing, and one end of the rotating arm (200) is fixedly connected to the rotating shaft.

9. A punch press safety protection device according to claim 3, characterized in that: The outer peripheral wall of the piston rod (302) and the inner wall of the cylinder (301) together form an upper air chamber (310); an annular groove (312) is provided on the open flange end face at the top of the cylinder (301), and the annular groove (312) communicates with the upper air chamber (310); a connecting flange (311) is provided on the open flange; a vent hole (313) is provided on the connecting flange (311) to communicate the annular groove (312) with the outside air.

10. A punch press safety protection device according to claim 9, characterized in that: The retaining ring (309) is disposed on the end face of the connecting flange (311).

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