Lifting fork arm material stop device

Abstract

This utility model discloses a material stopping device for a lifting fork arm, relating to the field of transfer device technology. The lifting fork arm material stopping device includes a base, a sliding block, a limiting mechanism, and an elastic reset component. A first guide slope is provided on the base. The sliding block has a second guide slope and a horizontal plane on opposite sides along a second direction. The sliding block has a sliding position and a stopping position. The technical solution of this utility model, by employing a guide slope structure between the sliding block and the base, effectively achieves stable switching between the sliding and stopping positions of the sliding block. After the material is pushed into position, the sliding block automatically moves to the stopping position under the action of the elastic reset component. Through the synergistic effect of the guide slope and the elastic reset force, the horizontal plane is in close contact with the material, providing flexible stopping force. This effectively prevents the material from slipping backward due to wear and failure of existing stopping blocks, significantly improving the stability and reliability of the stopping function.

Description

Technical Field

[0001] This utility model relates to the field of transfer device technology, and in particular to a material stop device for a lifting fork arm. Background Technology

[0002] In a high-speed production line for multi-station presses, the material destacking process is as follows: a forklift loads materials onto a CS (Carrying System) trolley, the CS trolley enters the destacking machine, the lifting fork lifts the materials, a pusher pushes the materials into a magnetic separator for separation, a robot feeds the materials into a positioning machine, and finally, the materials are sent into the die for stamping. However, during the process of the pusher pushing the materials into the magnetic separator and retracting, the materials often slip backward. The root cause of this problem is that the material stop block on the lifting fork is prone to wear, causing the stop function to fail, thus failing to effectively prevent the materials from slipping back, resulting in equipment malfunctions, material falling and deformation, and other consequences, seriously affecting production efficiency and safety. Utility Model Content

[0003] The main purpose of this invention is to propose a material stop device for lifting forks, which aims to solve the problem of material slippage caused by wear failure of existing stop blocks.

[0004] To achieve the above objectives, this utility model proposes a material stop device for a lifting fork arm, the lifting fork arm material stop device comprising:

[0005] A base is provided with a first guide slope, the two ends of the first guide slope being respectively a first end and a second end arranged opposite to each other along a first direction, the first end being higher than the second end, and the base is used to connect with a lifting fork arm;

[0006] A sliding block has a second guide slope and a horizontal plane on its two sides opposite to each other along a second direction. The second guide slope has a third end and a fourth end opposite to each other along a first direction, with the third end higher than the fourth end. The horizontal plane has a feed end and a discharge end opposite to each other along the first direction, with the feed end facing the third end and the discharge end facing the fourth end. The second guide slope slides in conjunction with the first guide slope. The sliding block has a sliding position and a stop position, and can reciprocate between the sliding position and the stop position. When the sliding block is in the stop position, the horizontal plane abuts against the material to restrict the material from moving from the discharge end to the feed end. When the sliding block is in the sliding position, the material can move from the feed end to the discharge end.

[0007] A limiting mechanism is connected to the base and is used to limit the separation of the second guide slope from the first guide slope.

[0008] An elastic reset member is provided, wherein the sliding block and the limiting mechanism are both connected to the elastic reset member, so that the elastic reset member can drive the sliding block to move from the sliding position to the stopping position.

[0009] In one embodiment, the base is provided with a guide groove, the groove wall of which forms the first guide slope, and the sliding block is provided with a guide block on the side facing the base, the outer wall of which forms the second guide slope.

[0010] In one embodiment, the guide groove includes a T-shaped guide groove, and the guide block includes a T-shaped guide block.

[0011] In one embodiment, the limiting mechanism includes a first stop and a second stop, the first stop and the second stop being disposed opposite to each other on both sides of the base along the first direction, and the elastic reset member being connected to the first stop and / or the second stop.

[0012] In one embodiment, the elastic reset member is connected to the second stop block, and the elastic reset member includes a compression spring.

[0013] In one embodiment, the first stop block is detachably connected to the base, and the second stop block is detachably connected to the base.

[0014] In one embodiment, the first stop includes a first body and a first bolt. The first body is provided with a first through hole, and the base is provided with a first threaded hole. The first bolt passes through the first through hole and engages with the first threaded hole.

[0015] And / or,

[0016] The second stop includes a second body and a second bolt. The second body is provided with a second through hole, and the base is provided with a second threaded hole. The second bolt passes through the second through hole and engages with the second threaded hole.

[0017] In one embodiment, the maximum sliding stroke of the second guide ramp relative to the first guide ramp is defined as L. Both the first guide ramp and the second guide ramp form an angle θ with the first direction. The wear compensation amount generated by the sliding block along the second direction after wear is Δh. Then: Δh=L×sinθ≤0.5mm.

[0018] In one embodiment, the length of the first guide ramp is defined as L1 and the length of the second guide ramp is defined as L2, then: L = L1 - L2.

[0019] In one embodiment, the base is provided with a mounting hole through which the mounting shaft of the lifting fork arm passes, and the wall of the mounting hole abuts against the outer wall of the mounting shaft of the lifting fork arm.

[0020] In this embodiment of the invention, the material is the material used in a high-speed production line of a multi-station press. A first guide slope is provided on the base, with two ends opposite each other along a first direction, namely a first end and a second end. The first end is higher than the second end, providing guidance and a sliding path for the sliding block. The two sides of the sliding block opposite each other along a second direction are a second guide slope and a horizontal surface, respectively. The second guide slope slides in conjunction with the first guide slope on the base, allowing the sliding block to switch between a sliding position and a stop position. The horizontal surface of the sliding block serves as a stop surface. In the stop position, it abuts against the material, effectively preventing the material from retreating from the discharge end to the feed end, thus avoiding the problem of material slippage. In the sliding position, it releases the material, allowing it to move forward. The structure is simple, the operation is reliable, and it is suitable for the actual working conditions of a high-speed destacking production line for a multi-station press. Specifically, when the material moves forward, the sliding block slides backward along the first guide ramp under force, changing the rigid obstruction between the horizontal surface and the material into a release mechanism, thus achieving flexible material release. After the material is pushed into position, the sliding block slides to the stop position along the first guide ramp under the action of the elastic reset component. The horizontal surface abuts against the lower surface of the material, and the elastic force of the elastic reset component and the ramp structure work together to achieve flexible stopping, preventing the material from slipping back. This guide ramp structure not only achieves stable sliding and resetting of the sliding block, but also provides a physical basis for wear compensation. Vertical displacement compensation can be achieved through the inclined sliding stroke, thereby extending the service life of the lifting fork arm material stop device. The limiting mechanism is connected to the base to prevent the sliding block from detaching from the base, ensuring that the two guide ramps are always in effective contact, enhancing structural stability and safety, and avoiding equipment failure or material deformation caused by the sliding block falling off. The elastic reset component connects the sliding block and the limiting mechanism, realizing automatic resetting of the sliding block without additional drive. The structure is simple, the response is rapid, and it significantly improves the automation level and operating efficiency of the lifting fork arm material stop device. Compared to traditional integrated stop block structures, this device significantly reduces the rapid wear of the stop block caused by hard friction, resulting in a marked reduction in the frequency of stop block replacement and annual spare parts cost savings of 55,680 yuan. The stop function automatically recovers after each material push, reducing manual intervention and increasing production line availability from 98.0% to 98.8%, saving 86,856 yuan in labor costs annually. Improved stop function stability significantly reduces material slippage, saving 1,920 yuan annually in material scrap losses due to stop failure. Furthermore, the reduced stop block replacement frequency saves an additional 12,032 yuan annually in labor costs for stop block replacement. Overall, the annual cost savings reach 156,488 yuan, demonstrating significant economic benefits.This embodiment of the invention utilizes a guide ramp structure between the sliding block and the base to effectively achieve stable switching between the sliding and stopping positions of the sliding block. When the material advances, the horizontal surface reduces friction with the material by releasing the sliding block, preventing rapid wear caused by rigid obstruction. After the material is pushed into position, the sliding block automatically moves to the stopping position under the action of the elastic reset component. Through the synergistic effect of the guide ramp and the elastic reset force, the horizontal surface is in close contact with the material, providing flexible stopping force. This effectively prevents material slippage caused by wear failure of existing stopping blocks, significantly improving the stability and reliability of the stopping function. Simultaneously, the stroke design of the sliding block along the first guide ramp automatically compensates for the sinking after the stopping block wears, maintaining effective contact between the horizontal surface and the material, thereby extending the service life of the lifting fork arm material stopping device. Furthermore, due to the mechanical characteristics of the inclined structure, the deeper the sliding block retracts (i.e., the greater the distance it slides downwards along the first guide ramp), the stronger its reset tendency and the greater the stopping force, thus achieving a self-reinforcing stopping effect of "the deeper it retracts, the greater the stopping force," further improving the stopping reliability. The design of the limiting mechanism effectively ensures the structural stability of the sliding block during operation, preventing equipment malfunctions or material spillage caused by the sliding block falling off. This lifting fork arm material stop device has a simple, compact, and durable overall structure, effectively solving the problem of material slippage caused by wear and failure of existing stop blocks, and significantly improving the stability, safety, and production efficiency of the stop device. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of an embodiment of the lifting fork arm material stop device of this utility model;

[0023] Figure 2 This is an exploded view of an embodiment of the lifting fork arm material stop device of this utility model;

[0024] Figure 3 This is a schematic diagram of an embodiment of the material stop device for lifting fork arms of the present invention, showing the sliding block located in the sliding position.

[0025] Figure 4 This is a schematic diagram of an embodiment of the material stop device for lifting fork arms of the present invention, showing the sliding block in the stop position.

[0026] Figure 5 This is a schematic diagram of the base of an embodiment of the lifting fork arm material stop device of this utility model;

[0027] Figure 6 This is a schematic diagram of the sliding block of an embodiment of the material stop device for the lifting fork arm of this utility model.

[0028] Explanation of icon numbers:

[0029] 100. Material stop device for lifting fork arm; 1. Base; 11. Guide groove; 111. First guide slope; 1111. First end; 1112. Second end; 12. First threaded hole; 13. Second threaded hole; 14. Mounting hole; 141. Opening; 2. Sliding block; 21. Guide block; 211. Second guide slope; 2111. Third end; 2112. Fourth end; 22. Horizontal plane; 221. Feed end; 222. Discharge end; 23. Sliding position; 24. Stop position; 25. Groove; 3. Limiting mechanism; 31. First stop block; 311. First body; 3111. First through hole; 32. Second stop block; 321. Second body; 3211. Second through hole; 4. Elastic reset component;

[0030] 200, Lifting fork arm; 210, Mounting shaft; 300, Material.

[0031] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0033] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, and back), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0034] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0035] In a high-speed production line for multi-station presses, the material destacking process is as follows: a forklift loads materials onto a CS trolley, the CS trolley enters the destacking machine, the lifting fork lifts the materials, a pusher pushes the materials into a magnetic separator for separation, a robot feeds the materials into a positioning machine, and finally, the materials are sent into the die for stamping. However, during the process of the pusher pushing the materials into the magnetic separator and retracting, the materials often slip backward. The root cause of this problem is that the material stop block on the lifting fork is prone to wear, leading to the failure of the stop function. This results in the inability to effectively prevent the materials from slipping back, causing equipment malfunctions, material falling and deformation, and other consequences, seriously affecting production efficiency and safety.

[0036] After careful study, the applicant discovered that in traditional structures, the stop block on the lifting fork arm is a one-piece square iron block, relying on hard friction between its horizontal surface and the material surface to achieve the stopping function. This design has significant drawbacks in actual operation: firstly, the hard friction between the stop block and the material leads to rapid wear and a short service life over long-term use; secondly, as a one-piece structure, the stop block cannot automatically adjust its position or compensate for wear after wear, causing the stopping effect to gradually decrease until it completely fails. Furthermore, if the stop block is worn and ineffective when the push rod retracts, the material is prone to slipping backward, affecting normal production processes and even causing safety accidents. Frequent stop block replacements also increase equipment maintenance frequency and labor costs, hindering the continuous and stable operation of the production line.

[0037] The main purpose of this invention is to propose a material stop device for lifting forks to solve the problem of material slippage caused by wear failure of existing stop blocks.

[0038] Please see Figures 1 to 4In one embodiment of this utility model, the lifting fork arm material stop device 100 includes a base 1, a sliding block 2, a limiting mechanism 3, and an elastic reset member 4. A first guide slope 111 is provided on the base 1. The two ends of the first guide slope 111, which are arranged opposite each other along a first direction, are a first end 1111 and a second end 1112, respectively. The first end 1111 is higher than the second end 1112. The base 1 is used to connect with the lifting fork arm 200. The two sides of the sliding block 2, which are arranged opposite each other along a second direction, are a second guide slope 211 and a horizontal surface 22, respectively. The two ends of the second guide slope 211, which are arranged opposite each other along the first direction, are a third end 2111 and a fourth end 2112, respectively. The third end 2111 is higher than the fourth end 2112. The two ends of the horizontal surface 22, which are arranged opposite each other along the first direction, are a feeding end 221 and a discharging end 222, respectively. The feeding end 221 faces the first end 2111 and the second end 2112. The three ends 2111 are arranged, with the discharge end 222 facing the fourth end 2112. The second guide slope 211 is slidably engaged with the first guide slope 111. The sliding block 2 has a sliding position 23 and a stop position 24. The sliding block 2 can reciprocate between the sliding position 23 and the stop position 24. When the sliding block 2 is located at the stop position 24, the horizontal surface 22 abuts against the material 300 to restrict the material 300 from moving from the discharge end 222 to the feed end 221. When the sliding block 2 is located at the sliding position 23, the material 300 can move from the feed end 221 to the discharge end 222. The limiting mechanism 3 is connected to the base 1 and is used to restrict the separation of the second guide slope 211 from the first guide slope 111. Both the sliding block 2 and the limiting mechanism 3 are connected to the elastic reset member 4 so that the elastic reset member 4 can drive the sliding block 2 to move from the sliding position 23 to the stop position 24.

[0039] In the embodiments of this utility model, such as Figure 1As shown, the first direction is left-right, the second direction is up-down, and the material 300 is the material used in the high-speed production line of the multi-station press. A first guide slope 111 is provided on the base 1, with its two ends, positioned opposite each other along the first direction, being a first end 1111 and a second end 1112. The first end 1111 is higher than the second end 1112, providing guidance and a sliding path for the sliding block 2. The two sides of the sliding block 2, positioned opposite each other along the second direction, are a second guide slope 211 and a horizontal surface 22. The second guide slope 211 slides in conjunction with the first guide slope 111 on the base 1, allowing the sliding block 2 to switch between a sliding position 23 and a stop position 24. The horizontal surface 22 of the sliding block 2 serves as a stop surface. When in the stop position 24, it abuts against the material 300, effectively preventing the material 300 from retreating from the discharge end 222 to the feed end 221, thus avoiding the problem of the material 300 slipping backward. When in the sliding position 23, it releases the material 300, allowing it to move forward. The structure is simple and the operation is reliable, making it suitable for the actual working conditions of a high-speed destacking production line for a multi-station press. Specifically, when the material 300 moves forward, the sliding block 2 is forced to slide backward along the first guide slope 111, changing the rigid obstruction between the horizontal surface 22 and the material 300 into a release, thus achieving flexible release of the material 300. After the material 300 is pushed into place, the sliding block 2 slides up along the first guide slope 111 to the stop position 24 under the action of the elastic reset member 4. The horizontal surface 22 abuts against the lower surface of the material 300, and under the combined action of the elastic force of the elastic reset member 4 and the slope structure, it achieves flexible stopping, preventing the material 300 from slipping back. This guide ramp structure not only achieves stable sliding and resetting of the sliding block 2, but also provides a physical basis for wear compensation. Vertical displacement compensation can be achieved through the inclined sliding stroke, thereby extending the service life of the lifting fork arm material stop device 100. The limiting mechanism 3 is connected to the base 1 to prevent the sliding block 2 from detaching from the base 1, ensuring that the two guide ramps are always in effective contact, enhancing structural stability and safety, and preventing equipment failure or material 300 falling and deforming due to the sliding block 2 falling off. The elastic reset component 4 connects the sliding block 2 and the limiting mechanism 3, realizing the automatic reset of the sliding block 2 without additional drive. Its simple structure and rapid response significantly improve the automation level and operating efficiency of the lifting fork arm material stop device 100. Compared to the traditional integrated stop block structure, this device significantly reduces the problem of rapid wear of the stop block caused by hard friction, significantly reducing the frequency of stop block replacement and saving 55,680 yuan in spare parts costs annually. The stop function can automatically recover after each material 300 push, reducing manual intervention and increasing the production line availability from 98.0% to 98.8%, saving 86,856 yuan in labor costs annually. With the improved stability of the stop function, the phenomenon of material 300 slipping backward is greatly reduced, reducing material 300 scrap losses caused by stop failure by 1,920 yuan annually. At the same time, due to the reduced frequency of stop block replacement, the annual labor cost required for stop block replacement can also be saved by 12,032 yuan.The total annual cost savings reached 156,488 yuan, demonstrating significant economic benefits.

[0040] The technical solution of this utility model effectively achieves stable switching of the sliding block 2 between the sliding position 23 and the stop position 24 by adopting a guide slope structure between the sliding block 2 and the base 1. When the material 300 moves forward, the horizontal surface 22 reduces the friction intensity between itself and the material 300 by releasing the sliding block 2, avoiding rapid wear caused by rigid obstruction. After the material 300 is pushed into place, the sliding block 2 automatically moves to the stop position 24 under the action of the elastic reset member 4. Through the synergistic effect of the guide slope and the elastic reset force, the horizontal surface 22 is in close contact with the material 300 and provides flexible stopping force, effectively preventing the material 300 from slipping backward due to wear failure of the existing stop block, and significantly improving the stability and reliability of the stopping function. At the same time, the stroke design of the sliding block 2 along the first guide slope 111 can automatically compensate for the sinking amount after the stop block wears, keeping the horizontal surface 22 in effective contact with the material 300 at all times, thereby extending the service life of the lifting fork arm material stopping device 100. Furthermore, due to the mechanical characteristics of the inclined structure, the deeper the sliding block 2 retracts, that is, the greater the distance it slides downward along the first guide inclined surface 111, the stronger its reset tendency and the greater the stopping force. This achieves a self-reinforcing stopping effect of "the deeper it retracts, the greater the stopping force," further improving the stopping reliability. The design of the limiting mechanism 3 effectively ensures the structural stability of the sliding block 2 during operation, preventing equipment malfunctions or material 300 falling due to the sliding block 2 detaching. The lifting fork arm material stopping device 100 has a simple, compact, and durable overall structure, effectively solving the problem of material 300 slipping backward due to wear and failure of existing stopping blocks, significantly improving the stability, safety, and production efficiency of the stopping device.

[0041] Please see Figure 2 , Figure 5 and Figure 6In one embodiment, a guide groove 11 is provided on the base 1, and the groove wall of the guide groove 11 forms a first guide slope 111. A guide block 21 is provided on the side of the sliding block 2 facing the base 1, and the outer wall of the guide block 21 forms a second guide slope 211. Specifically, the lifting fork arm material stop device 100 achieves the sliding engagement between the first guide slope 111 and the second guide slope 211 through the cooperation structure between the guide groove 11 on the base 1 and the guide block 21 on the sliding block 2. The guide groove 11 provides an embedded sliding space for the guide block 21 on the sliding block 2, so that the sliding block 2 is always covered and limited by the guide groove 11 during the sliding process. This structure not only achieves stable guidance of the sliding block 2, but also enhances the structural rigidity and load-bearing capacity during the sliding process. At the same time, the cooperation between the guide groove 11 and the guide block 21 effectively prevents the sliding block 2 from shifting or getting stuck during the sliding process, ensuring its stable and smooth operation. During the forward movement of material 300, sliding block 2 slides backward along guide groove 11 under force, achieving retraction and reducing friction intensity with material 300, thus avoiding rapid wear caused by rigid obstruction. After material 300 is pushed into position, sliding block 2 moves to stop position 24 under the action of elastic reset element 4, so that horizontal surface 22 re-contacts material 300 and provides flexible stopping force, effectively preventing material 300 from slipping backward. This structure is reasonably designed, provides stable guidance, and is reliable in operation, significantly improving the stability and safety of the stopping device, and is suitable for the actual application needs of high-speed destacking production lines for multi-station presses.

[0042] According to one embodiment of the present invention, a guide block 21 is provided on the base 1, the groove wall of the guide block 21 forms a first guide slope 111, and a guide groove 11 is provided on the side of the sliding block 2 facing the base 1, the outer wall of the guide groove 11 forms a second guide slope 211.

[0043] According to another embodiment of the present invention, the first guide inclined surface 111 and the second guide inclined surface 211 can also achieve sliding cooperation through linear slide rail and slider cooperation or sliding bearing and guide rail cooperation.

[0044] Please see Figure 5 and Figure 6In one embodiment, the guide groove 11 includes a T-shaped guide groove, and the guide block 21 includes a T-shaped guide block. Specifically, the guide groove 11 adopts a T-shaped guide groove with a T-shaped cross-section, consisting of a wide head section and a narrow neck section; the guide block 21 adopts a T-shaped guide block with a similarly T-shaped cross-section, including a wide head section and a narrow neck section, and is embedded in the T-shaped guide groove to form a nested sliding fit structure. During sliding, the T-shaped guide groove has a covering and limiting effect on the T-shaped guide block, preventing the sliding block 2 from shifting laterally or detaching from the base 1, ensuring that the sliding block 2 always slides stably along the set path. Compared with other shapes of guide groove 11 and guide block 21 structures, the T-shaped guide groove has stronger anti-detachment limiting ability, lower frictional resistance and smoother guidance during sliding, and stronger load-bearing capacity. Furthermore, the T-shaped guide block also has good resistance to lateral forces, effectively preventing the sliding block 2 from tilting or jamming during force application, thus improving the operational stability of the stopping device. This structural design is suitable for applications involving stop devices that experience frequent sliding, complex stress, and high guiding accuracy, significantly improving the structural stability and operational reliability of the stop device.

[0045] According to one embodiment of the present invention, the guide groove 11 includes a U-shaped groove, a dovetail groove or other shaped guide groove 11, and the guide block 21 is correspondingly configured as a U-shaped guide block, a dovetail block or a guide block 21 having a shape adapted to the guide groove 11, so as to achieve sliding fit and stable guidance.

[0046] Please see Figure 1 and Figure 2 In one embodiment, the limiting mechanism 3 includes a first stop 31 and a second stop 32, which are disposed opposite to each other on both sides of the base 1 along a first direction. The elastic reset member 4 is connected to the first stop 31 and / or the second stop 32. Specifically, the first stop 31 and the second stop 32 are disposed opposite to each other on both sides of the base 1 along the first direction to limit the sliding stroke of the sliding block 2. The first stop 31 is disposed at the end of the reset path of the sliding block 2, and the second stop 32 is disposed at the end of the downward sliding path of the sliding block 2 to prevent it from sliding excessively out of the base 1, and also to provide a mounting fulcrum for the elastic reset member 4. One end of the elastic reset member 4 is connected to the sliding block 2, and the other end is connected to the first stop 31 and / or the second stop 32. After the material 300 is pushed, it drives the sliding block 2 to slide upward along the first guide slope 111 to reset and restore the stopping function. By cooperating with the first stop 31 and the second stop 32, not only is stable switching of the sliding block 2 between the sliding position 23 and the stop position 24 achieved, but a reliable mounting structure is also provided for the elastic reset component 4, improving the response speed and operational reliability of the lifting fork arm material stop device 100. This limiting mechanism 3 has a compact structure and clearly defined functions, significantly enhancing the stability and safety of the stop device, and is suitable for the practical application needs of high-speed depalletizing production lines.

[0047] Please see Figures 1 to 4 In one embodiment, the elastic reset member 4 is connected to the second stop 32. The elastic reset member 4 includes a compression spring. Specifically, the second stop 32 is located on the right side of the base 1 and is used to limit the sliding block 2 to the endpoint of sliding down the second guide slope 211, and to provide a mounting point for the compression spring. One end of the compression spring is connected to the sliding block 2, and the other end is connected to the second stop 32. The compression spring is in a pre-compressed state when the sliding block 2 is in the stop position 24, storing reset potential energy. When the material 300 advances and pushes the sliding block 2 to slide down the first guide slope 111 and then retreats, the compression spring is further compressed. After the material 300 is pushed, the sliding block 2 slides up the first guide slope 111 under the action of the compression spring to reset and restore the stopping function. The compression spring not only provides the restoring force but also drives the sliding block 2 to continue moving upward along the first guide slope 111 until the horizontal surface 22 is in close contact with the lower surface of the material 300, enhancing the stopping friction. That is, even after the sliding block 2 wears, the compression spring can still drive it upward along the first guide slope 111, achieving automatic compensation after wear and ensuring that the horizontal surface 22 always maintains effective contact with the material 300. This structure, through the cooperation of the compression spring and the second stop block 32, achieves stable automatic reset and automatic wear compensation functions for the sliding block 2, significantly improving the response speed, stability, and service life of the stopping device. It is suitable for the practical application needs of high-speed depalletizing production lines for multi-station presses. The compression spring has a simple structure, controllable restoring force, and convenient installation and maintenance, significantly reducing system complexity and maintenance costs, making it suitable for the practical application needs of high-speed depalletizing production lines for multi-station presses.

[0048] According to one embodiment of this utility model, the elastic reset member 4 is connected to the first stop block 31. The elastic reset member 4 includes a tension spring, one end of which is connected to the sliding block 2, and the other end is connected to the first stop block 31. The first stop block 31 is located on the left side of the base 1, used to limit the end point of the reset path of the sliding block 2, and to provide a mounting fulcrum for the tension spring. When the material 300 pushes the sliding block 2 to slide backward along the first guide slope 111, the tension spring is stretched and stores reset potential energy; after the material 300 is pushed, the sliding block 2 slides back up along the first guide slope 111 under the tension of the tension spring, restoring the stopping function. This structure, through the cooperation of the tension spring and the first stop block 31, achieves stable automatic reset of the sliding block 2, improving the response speed and reliability of the stopping device. The tension spring not only provides the restoring force but also drives the sliding block 2 to continue moving upward along the first guide slope 111 until the horizontal surface 22 is in close contact with the lower surface of the material 300, enhancing the stopping friction. That is, even after the sliding block 2 wears, the tension spring can still drive it upward along the first guide slope 111, achieving automatic compensation after wear and ensuring that the horizontal surface 22 always maintains effective contact with the material 300. This structure, through the cooperation of the tension spring and the second stop 32, achieves stable automatic reset and automatic wear compensation functions for the sliding block 2, significantly improving the response speed, stability, and service life of the stopping device. It is suitable for the practical application needs of high-speed depalletizing production lines for multi-station presses. The tension spring has a simple structure, controllable restoring force, and convenient installation and maintenance, significantly reducing system complexity and maintenance costs, making it suitable for the practical application needs of high-speed depalletizing production lines for multi-station presses.

[0049] According to another embodiment of this utility model, the elastic reset component 4 includes a tension spring and a compression spring. The two ends of the tension spring are connected to the first stop block 31 and the sliding block 2, respectively, and the two ends of the compression spring are also connected to the first stop block 31 and the sliding block 2, forming a composite elastic reset structure. When the material 300 pushes the sliding block 2 backward along the first guide slope 111, the tension spring is stretched to store reset potential energy, while the compression spring is compressed to absorb impact energy. After the material 300 is pushed, the sliding block 2 slides upward along the first guide slope 111 under the combined action of the tension spring and the compression spring, resetting and restoring its stopping function. This structure, through the synergistic effect of the two springs, not only improves the stability and response speed of the sliding block 2's reset but also enhances the device's adaptability to different working conditions. Meanwhile, after the sliding block 2 wears out, the compression spring and tension spring can still drive it to continue moving upward along the first guide slope 111, realizing automatic compensation after wear, so that the horizontal surface 22 always maintains effective contact with the material 300, realizing the stable automatic reset and wear compensation function of the sliding block 2, significantly improving the response speed, stability and service life of the stop device, and is suitable for the actual application needs of high-speed destacking production line of multi-station press.

[0050] Please see Figure 1 and Figure 2 In one embodiment, the first stop block 31 and the second stop block 32 are detachably connected to the base 1. Specifically, the first stop block 31 and the second stop block 32 are detachably connected and disposed on the left and right sides of the base 1, facilitating disassembly, replacement, or position adjustment according to actual usage requirements. This structure not only ensures the connection stability between the first stop block 31 and the second stop block 32 and the base 1, but also significantly improves the maintainability, adjustability, and functional expansion capability of the lifting fork arm material stop device 100. Through the detachable connection, users can replace the stop blocks of different specifications according to the thickness of the material 300 or the required sliding stroke, enhancing the adaptability and versatility of the lifting fork arm material stop device 100. This design supports modular assembly and quick replacement, effectively reducing maintenance costs and equipment downtime, and significantly improving the practicality and production efficiency of the stop device.

[0051] Please see Figure 1 and Figure 2 In one embodiment, the first stop 31 includes a first body 311 and a first bolt (not shown). The first body 311 has a first through hole 3111, and the base 1 has a first threaded hole 12. The first bolt passes through the first through hole 3111 and is threaded into the first threaded hole 12. And / or, the second stop 32 includes a second body 321 and a second bolt (not shown). The second body 321 has a second through hole 3211, and the base 1 has a second threaded hole 13. The second bolt passes through the second through hole 3211 and is threaded into the second threaded hole 13. Specifically, both the first stop 31 and the second stop 32 are connected to the threaded holes on the base 1 via bolts, achieving a stable connection and convenient assembly / disassembly between the stop and the base 1. Bolted connections have advantages such as convenient installation, flexible disassembly, and reliable connection, effectively preventing the stop from loosening or falling off due to vibration or impact, and improving the stability and safety of the stopping device. Furthermore, the threaded mounting holes on the base 1 support flexible adjustment of the mounting positions of the two stops, enhancing the adaptability of the stop device to different material thicknesses and sliding strokes. This structure is rationally designed, reliably connected, and highly practical, suitable for the actual application needs of high-speed destacking production lines for multi-station presses. In addition, in this embodiment, the first stop 31 and the second stop 32 adopt the same structural design, realizing modularization and standardization of components, facilitating unified manufacturing, assembly, and replacement, and significantly improving the maintainability, versatility, and economy of the stop device.

[0052] According to one embodiment of the present invention, both the first stop block 31 and the second stop block 32 can be detachably connected to the base 1 by snap-fit ​​or plug-in.

[0053] In one embodiment, the maximum sliding stroke of the second guide ramp 211 relative to the first guide ramp 111 is defined as L. Both the first and second guide ramps 111 and 211 form an angle θ with the first direction. The wear compensation amount generated by the sliding block 2 along the second direction after wear is Δh. Therefore, Δh = L × sinθ ≤ 0.5mm. Specifically, this parameter relationship indicates that by rationally designing the sliding stroke L and the ramp angle θ, the sliding block 2 can still automatically compensate for the sinking amount Δh along the ramp structure after wear, ensuring that the horizontal surface 22 always maintains effective contact with the lower surface of the material 300. Since a 0.5mm compensation amount has been redundant in the ramp structure design stage, even if the sliding block 2 wears, it can be automatically replenished by the ramp structure without manual adjustment or replacement of parts. This design not only improves the stability and reliability of the stop device but also significantly extends its service life, making it particularly suitable for the practical application needs of high-speed destacking production lines for multi-station presses. In this embodiment, due to the structural space limitations and functional requirements of the lifting fork arm 200, the height of the lifting fork arm material stop device 100 before wear is designed to be 37mm, and the maximum allowable wear is 0.5mm. Therefore, when the height of the lifting fork arm material stop device 100 after wear is in the range of 36.5mm to 37mm, it can still automatically replenish itself by relying on the inclined structure to maintain the stop function without the need for manual adjustment or replacement of parts.

[0054] In one embodiment, the length of the first guide ramp 111 is defined as L1, and the length of the second guide ramp 211 is defined as L2, then: L = L1 - L2. Specifically, this structure means that the second guide ramp 211 can be completely nested inside the first guide ramp 111. When the sliding block 2 slides down along the first guide ramp 111 under the push of the material 300, the entire second guide ramp 211 can slide within the first guide ramp 111, forming a complete sliding path. Compared with the case where the second guide ramp 211 is only partially embedded in the first guide ramp 111, this embodiment has significant advantages such as a complete sliding path, excellent guiding performance, and controllable sliding stroke. Through this structural design, not only can the sliding block 2 be ensured to have good guidance and support during the sliding process, improving the stability and reliability of the sliding process, but it is also convenient to combine the ramp angle to design the wear compensation amount Δh = L × sinθ, realizing the automatic compensation function after wear. This structure is compact and highly integrated, suitable for the stop device of the lifting fork arm 200 in space-constrained applications, significantly improving the stability, service life, and engineering practicality of the stop device.

[0055] According to an embodiment of this utility model, the length of the first guide slope 111 is defined as L1, and the length of the second guide slope 211 is defined as L2. Then, L = L2 - L1. This structure indicates that the length of the second guide slope 211 is greater than that of the first guide slope 111. When the sliding block 2 is in the initial stop position 24, the second guide slope 211 is only partially embedded within the first guide slope 111. When the material 300 pushes the sliding block 2 down the slope, the second guide slope 211 slides relative to the first guide slope 111, and its relative sliding stroke is determined by the length difference between the two, i.e., L = L2 - L1. This structure realizes a non-fully nested sliding guide method, suitable for applications where the first guide slope 111 is short or the installation space is limited. By rationally designing the dimensions of L1 and L2, the sliding stroke can be precisely controlled, thereby achieving effective regulation of the wear compensation amount Δh = L × sinθ. This compact and flexible structure not only improves the structural adaptability of the stop device, but also ensures the stability and reset reliability of the sliding block 2 during the sliding process. It is suitable for practical applications in multi-station press high-speed destacking production lines where space utilization and functional stability are required.

[0056] Please see Figure 2In one embodiment, the base 1 is provided with a mounting hole 14 through which the mounting shaft 210 of the lifting fork arm 200 passes. The wall of the mounting hole 14 abuts against the outer wall of the mounting shaft 210 of the lifting fork arm 200. Specifically, this structure achieves stable assembly between the stop device and the lifting fork arm 200 through the cooperation between the mounting shaft 210 and the mounting hole 14, so that the stop device can be firmly installed on the lifting fork arm 200 and effectively transmit the reaction force generated during the pushing of the material 300. The wall of the mounting hole 14 and the outer wall of the mounting shaft 210 are in abutment fit, which can be a clearance fit, transition fit, or interference fit, ensuring the precise positioning of the stop device and facilitating quick installation and disassembly on site. This structure not only improves the structural reliability and operational stability of the lifting fork arm material stop device 100, but also enhances its versatility and adaptability on lifting fork arms 200 of different specifications, making it suitable for the actual application needs of high-speed destacking production lines for multi-station presses. In addition, in this embodiment, due to the structural space limitations of the lifting fork arm 200, the base 1 is relatively small and cannot fully accommodate the mounting shaft 210 on the lifting fork arm 200. The mounting hole 14 has an opening 141 on the side facing the sliding block 2, allowing at least a portion of the mounting shaft 210 to extend out. The sliding block 2 has a groove 25 on the side facing the base 1. The groove wall of the groove 25 slides in cooperation with the mounting shaft 210 extending out of the opening 141, thus achieving stable assembly of the stop device and the lifting fork arm 200 while avoiding interference with the sliding cooperation of the second guide slope 211 relative to the first guide slope 111. This structure effectively resolves the contradiction between assembly and functional realization under space constraints, ensuring that the sliding block 2 can slide smoothly along the first guide slope 111 and reliably reset, improving the structural stability and operational reliability of the stop device. This design is compact, flexible in assembly, and easy to maintain, making it suitable for practical applications in multi-station press high-speed destacking production lines where space utilization and functional stability are critical.

[0057] The above description is merely an exemplary embodiment of the present utility model and does not limit the scope of protection of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.

Claims

1. A material stop device for a lifting fork arm, characterized in that, The lifting fork arm material stop device includes: A base is provided with a first guide slope, the two ends of the first guide slope being respectively a first end and a second end arranged opposite to each other along a first direction, the first end being higher than the second end, and the base is used to connect with a lifting fork arm; A sliding block has a second guide slope and a horizontal plane on its two sides opposite to each other along a second direction. The second guide slope has a third end and a fourth end opposite to each other along a first direction, with the third end higher than the fourth end. The horizontal plane has a feed end and a discharge end opposite to each other along the first direction, with the feed end facing the third end and the discharge end facing the fourth end. The second guide slope slides in conjunction with the first guide slope. The sliding block has a sliding position and a stop position, and can reciprocate between the sliding position and the stop position. When the sliding block is in the stop position, the horizontal plane abuts against the material to restrict the material from moving from the discharge end to the feed end. When the sliding block is in the sliding position, the material can move from the feed end to the discharge end. A limiting mechanism is connected to the base and is used to limit the separation of the second guide slope from the first guide slope. An elastic reset member is provided, wherein the sliding block and the limiting mechanism are both connected to the elastic reset member, so that the elastic reset member can drive the sliding block to move from the sliding position to the stopping position.

2. The material stop device for the lifting fork arm as described in claim 1, characterized in that, The base is provided with a guide groove, the groove wall of which forms the first guide slope. The sliding block is provided with a guide block on the side facing the base, and the outer wall of the guide block forms the second guide slope.

3. The lifting fork arm material stop device as described in claim 2, characterized in that, The guide groove includes a T-shaped guide groove, and the guide block includes a T-shaped guide block.

4. The material stop device for the lifting fork arm as described in claim 1, characterized in that, The limiting mechanism includes a first stop and a second stop, which are disposed opposite to each other on both sides of the base along the first direction, and the elastic reset member is connected to the first stop and / or the second stop.

5. The material stop device for the lifting fork arm as described in claim 4, characterized in that, The elastic reset member is connected to the second stop block, and the elastic reset member includes a compression spring.

6. The material stop device for the lifting fork arm as described in claim 4, characterized in that, The first stop block is detachably connected to the base, and the second stop block is detachably connected to the base.

7. The lifting fork arm material stop device as described in claim 5, characterized in that, The first stop includes a first body and a first bolt. The first body is provided with a first through hole, and the base is provided with a first threaded hole. The first bolt passes through the first through hole and engages with the first threaded hole. And / or, The second stop includes a second body and a second bolt. The second body is provided with a second through hole, and the base is provided with a second threaded hole. The second bolt passes through the second through hole and engages with the second threaded hole.

8. The material stop device for the lifting fork arm as described in any one of claims 1 to 7, characterized in that, Let L be the maximum sliding stroke of the second guide slope relative to the first guide slope. Let θ be the angle between the first guide slope and the second guide slope and the first direction. Let Δh be the wear compensation amount generated by the sliding block along the second direction after wear. Then we have: Δh=L×sinθ≤0.5mm.

9. The material stop device for the lifting fork arm as described in claim 8, characterized in that, Let the length of the first guide ramp be L1 and the length of the second guide ramp be L2, then we have: L = L1 - L2.

10. The material stop device for the lifting fork arm as described in any one of claims 1 to 7, characterized in that, The base is provided with a mounting hole through which the mounting shaft of the lifting fork arm passes, and the wall of the mounting hole abuts against the outer wall of the mounting shaft of the lifting fork arm.

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