Permanent magnet roller self-locking backstop

Abstract

The utility model relates to the technical field of backstops, and discloses a permanent magnet roller self-locking backstop which comprises a backstop body, a mounting hole is formed in the center of the interior of the backstop body, flat key grooves are formed in the upper side and the lower side of the mounting hole respectively, a roller shaft is slidably connected into the mounting hole, and the roller shaft is connected with a permanent magnet roller. The upper side and the lower side of the roller shaft are fixedly connected with protruding blocks, the two sides of the inner walls of the flat key grooves in the two sides are each provided with a plurality of limiting assemblies, each limiting assembly comprises a limiting ball, the side wall of each limiting ball is fixedly connected with a limiting plate, and the side edge of each limiting plate is provided with a limiting spring. According to the utility model, the roller shaft is inserted into the mounting hole, the convex block is ensured to be aligned with the flat key groove, and after the roller shaft is completely inserted, the limiting spring reversely pushes the limiting ball to be clamped into the limiting groove, so that the roller shaft is limited, the effect of automatically locking the position of the roller shaft is achieved, and the problem of easy axial movement or positioning deviation in the traditional roller shaft mounting process is solved; and the installation efficiency and the connection stability are improved.

Description

Technical Field

[0001] This utility model relates to the field of backstop technology, and in particular to a permanent magnet drum self-locking backstop. Background Technology

[0002] In material handling and industrial transmission scenarios, permanent magnet rollers, as key components for power output and material transfer, often require backstops to ensure operational safety. When equipment stops or encounters emergencies, the backstop must precisely prevent the permanent magnet roller from reversing, avoiding material backflow and equipment damage. With increasing production efficiency, the requirements for the ease of installation and connection stability of backstops are becoming increasingly stringent, driving continuous iteration and optimization of backstop technology to adapt to the complex working conditions of permanent magnet rollers.

[0003] Traditional permanent magnet drum backstops are mostly based on mechanical locking principles, such as using a wedge-slide structure, where the wedge locks in place when the drum reverses its direction; or using a ratchet-pawl combination, where the pawl engages with the ratchet teeth to achieve backstop. These structures rely on friction and engagement between mechanical parts to generate resistance and prevent the drum from rotating in the opposite direction, providing basic backstop functionality under simple operating conditions.

[0004] Existing technologies have shortcomings. In the installation of the roller shaft, traditional connection and positioning methods are prone to axial movement or positioning deviations. This significantly reduces installation efficiency, leads to frequent rework, and is time-consuming and labor-intensive. It also results in poor stability of the connection between the backstop and the roller shaft, exacerbating vibration and wear during equipment operation, and seriously threatening the service life and operational safety of the equipment. Technological improvements are urgently needed to solve these problems. Therefore, a permanent magnet roller self-locking backstop is proposed to address these issues. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a permanent magnet drum self-locking backstop, which aims to improve the problem of axial movement or positioning deviation that easily occurs in the installation of existing drum shafts.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A permanent magnet drum self-locking backstop includes a backstop body. A mounting hole is provided at the center of the backstop body. Keyways are provided on both the upper and lower sides of the mounting hole. A drum shaft is slidably connected inside the mounting hole. Protrusions are fixedly connected on both the upper and lower sides of the drum shaft. Multiple limiting grooves are provided on both sides of the inner wall of each protrusion. The outer wall of each protrusion is slidably connected inside the keyway. Multiple limiting components are provided on both sides of the inner wall of the keyway. The limiting grooves and limiting components are arranged in a linear array.

[0008] The limiting assembly includes a limiting ball, the outer wall of which is slidably connected to the inside of the limiting groove. A limiting plate is fixedly connected to the side wall of the limiting ball. The outer wall of the limiting plate is slidably connected to the inside of the backstop body. A limiting spring is provided on the side of the limiting plate. One end of the limiting spring is fixedly connected to the side wall of the limiting plate, and the other end of the limiting spring is fixedly connected to the inside of the backstop body.

[0009] As a further description of the above technical solution:

[0010] The bottom of the check valve body is provided with a fixing component, which includes a fixing platform. Each of the four corners of the fixing platform is threaded with a fixing bolt, which is used to fix the fixing platform.

[0011] As a further description of the above technical solution:

[0012] A fixing plate is fixedly connected to the bottom of the backstop body, a connecting plate is fixedly connected to the bottom of the fixing plate, and fixing blocks are fixedly connected to both sides of the connecting plate. The outer walls of the connecting plate and the fixing blocks are slidably connected to the inside of the fixing platform.

[0013] As a further description of the above technical solution:

[0014] The top of each of the two fixing blocks is provided with symmetrical guide grooves, and a linkage handle is slidably connected inside each guide groove.

[0015] As a further description of the above technical solution:

[0016] A connecting circular plate is fixedly connected to the bottom of the linkage handle, and the outer wall of the connecting circular plate is slidably connected to the inside of the fixed block.

[0017] As a further description of the above technical solution:

[0018] A locking post is provided on one side of the connecting circular plate, and a reset spring is provided on the other side of the connecting circular plate.

[0019] As a further description of the above technical solution:

[0020] One end of the locking post is fixedly connected to the side wall of the connecting circular plate, and the other end of the locking post is inserted into the interior of the fixing platform. The locking post is used to fix the position of the fixing platform and the fixing block.

[0021] As a further description of the above technical solution:

[0022] One end of the reset spring is fixedly connected inside the fixed block, and the other end of the reset spring is fixedly connected to the side wall of the connecting circular plate.

[0023] This utility model has the following beneficial effects:

[0024] 1. In this utility model, the roller shaft on one side of the permanent magnet roller is inserted into the mounting hole, ensuring that the protrusion is aligned with the flat keyway. After the roller shaft is fully inserted, the limit spring pushes the limit ball into the limit groove, thus limiting the roller shaft and achieving the effect of automatically locking the position of the roller shaft. This solves the problem of axial movement or positioning deviation that easily occurs in the traditional roller shaft installation, and improves the installation efficiency and connection stability.

[0025] 2. In this utility model, the worker places the fixing block into the fixing platform, loosens the linkage handle, and the reset spring pushes the locking pin into the hole of the fixing platform to complete the fixing, achieving the effect of quick disassembly and assembly of the backstop body. This solves the problem that traditional devices require multiple tools for disassembly and assembly, are time-consuming and labor-intensive, and are prone to damaging parts, thus improving maintenance efficiency and ease of operation. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of a permanent magnet drum self-locking backstop proposed in this utility model;

[0027] Figure 2 This is an exploded view of the backstop body structure of a permanent magnet drum self-locking backstop proposed in this utility model;

[0028] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0029] Figure 4 This is a schematic diagram of the fixing block structure of a permanent magnet drum self-locking backstop proposed in this utility model;

[0030] Figure 5 for Figure 4 Enlarged view of point B in the middle.

[0031] Legend:

[0032] 1. Fixed platform; 2. Fixed bolt; 3. Connecting plate; 4. Fixed plate; 5. Backstop body; 6. Mounting hole; 7. Flat keyway; 8. Roller shaft; 9. Protrusion; 10. Limiting groove; 11. Limiting ball; 12. Limiting plate; 13. Limiting spring; 14. Fixed block; 15. Guide groove; 16. Locking post; 17. Connecting round plate; 18. Linkage handle; 19. Return spring. Detailed Implementation

[0033] 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 protection scope of the present utility model.

[0034] Reference Figure 1 - Figure 3 This utility model provides an embodiment of a permanent magnet drum self-locking backstop, including a backstop body 5. The backstop body 5 is forged from 40Cr alloy structural steel and heat-treated. This is prior art and will not be described in detail here. The mounting hole 6 at the center of the body is a cylindrical through hole with a diameter that matches the drum shaft 8. It is used to accommodate the drum shaft 8 and achieve axial positioning. The flat keyways 7 on the upper and lower sides of the mounting hole 6 are rectangular grooves with a width that matches the protrusion 9. They are used to cooperate with the protrusion 9 to transmit torque and restrict the circumferential rotation of the drum shaft 8.

[0035] The roller shaft 8, which is slidably connected inside the mounting hole 6, is made of 45# steel and has undergone heat treatment. It is used to connect the permanent magnet roller and transmit power. This is existing technology and will not be described in detail here. The protruding blocks 9, which are welded and fixedly connected to the upper and lower sides of the roller shaft 8, are made of 40Cr steel and are clearance-fitted with the flat keyway 7. The outer wall is slidably connected inside the flat keyway 7 to prevent relative rotation between the roller shaft 8 and the backstop body 5. Multiple limiting grooves 10 are opened on both sides of the inner wall of the protruding blocks 9 on the upper and lower sides. These are hemispherical grooves with a diameter that matches the limiting ball 11. They are used to cooperate with the limiting components to achieve axial locking of the roller shaft 8. Multiple limiting components arranged in a linear array on both sides of the inner wall of the flat keyway 7 are used to lock the position of the roller shaft 8, including the limiting ball 11. The ball 11 is made of bearing steel, and its outer wall forms an interference fit with the inner wall of the limiting groove 10. It is slidably connected inside the limiting groove 10 and is used to lock into the limiting groove 10 to achieve axial fixation of the roller shaft 8. The limiting plate 12, which is a 304 steel round plate, is welded and fixed to the side wall of the limiting ball 11. Its outer wall forms a sliding fit with the guide hole inside the backstop body 5. It is slidably connected inside the backstop body 5 and is used to transmit spring force to the limiting ball 11 and limit its range and direction of movement. The limiting spring 13 on the side of the limiting plate 12 is made of spring steel. One end of it is welded to the side wall of the limiting plate 12, and the other end is welded to the spring seat inside the backstop body 5. It is used to provide continuous radial thrust to the limiting ball 11 and ensure that the limiting ball 11 and the limiting groove 10 are tightly fitted.

[0036] Reference Figure 4 and Figure 5The fixing assembly at the bottom of the backstop body 5 is used to fix the backstop to one side of the permanent magnet drum. It includes a fixing platform 1, which is made of gray cast iron. The four corner threads are threaded holes with internal threads for fixing bolts 2. The fixing bolts 2 are high-strength bolts, which are used to pass through the fixing platform 1 and fix it to the mounting surface on the side of the permanent magnet drum to ensure the overall structure is stable. The fixing plate 4, which is fixed to the bottom of the backstop body 5 by bolts, is a Q235B steel plate, which is used to connect the backstop body 5 and the connecting plate 3. The connecting plate 3, which is fixedly welded to the bottom of the fixing plate 4, is a steel plate of the same material. The fixing blocks 14, which are fixedly welded to both sides, are 40Cr steel with a rectangular cross section. The outer walls of the connecting plate 3 and the fixing blocks 14 slide in the groove inside the fixing platform 1, and slide inside the fixing platform 1 to achieve quick docking between the backstop body 5 and the fixing platform 1.

[0037] The top of the two fixing blocks 14 has symmetrical upper and lower guide grooves 15, which are rectangular grooves. The linkage handle 18, which is slidably connected inside, is a No. 45 steel round rod with anti-slip texture on the top for easy operation. The bottom of the linkage handle 18 is welded and fixedly connected to a connecting round plate 17, which is a Q235B steel plate. Its outer wall slides in fit with the cylindrical cavity inside the fixing block 14 and is slidably connected inside the fixing block 14. It is used to synchronously drive the locking post 16 and compress the return spring 19. The locking post 16 on one side of the connecting round plate 17 is made of No. 45 steel. The side wall of one end of the locking post 16... The locking pin 16 is fixedly connected to the side wall of the connecting circular plate 17 by welding. The other end of the locking pin 16 can be inserted into the corresponding positioning hole inside the fixing platform 1 to fix the relative position of the fixing platform 1 and the fixing block 14 and achieve position locking. The return spring 19 on the other side of the connecting circular plate 17 is made of spring steel. One end of it is welded to the spring seat inside the fixing block 14, and the other end is welded to the side wall of the connecting circular plate 17. It is used to provide a return force for the connecting circular plate 17 and the locking pin 16 to ensure that the locking pin 16 is reliably inserted into the corresponding positioning hole inside the fixing platform 1.

[0038] Working principle: When using this permanent magnet drum self-locking backstop, the operator first installs the fixing platform 1 on one side of the permanent magnet drum using the fixing bolts 2. Then, the operator manually slides the linkage handle 18 above the fixing blocks 14 on both sides inward. The displacement of the linkage handle 18 causes the connecting circular plate 17 to move, which on the one hand causes the locking pin 16 to retract into the fixing block 14, and on the other hand causes the return spring 19 to be compressed. At this time, the operator puts the fixing block 14 into the fixing platform 1 and releases the linkage handle 18. Under the push of the return spring 19, the locking pin 16 is inserted into the hole inside the fixing platform 1, thus completing the height adjustment of the fixing block 14 and achieving the effect of quickly disassembling and assembling the backstop body 5.

[0039] After the backstop body 5 is installed, the operator inserts the roller shaft 8 on one side of the permanent magnet roller into the mounting hole 6 inside the backstop body 5, and ensures that the protrusion 9 is aligned with the keyway 7. As the protrusion 9 slides into the keyway 7, the outer wall of the protrusion 9 presses against the limiting balls 11 on both sides of the keyway 7, causing the limiting balls 11 to drive the limiting plate 12 to retract and compress the limiting spring 13. When one end of the roller shaft 8 is fully inserted into the mounting hole 6, the limiting spring 13 pushes the limiting ball 11 back into the limiting groove 10 on the side wall of the protrusion 9, thus completing the limiting of the roller shaft 8 and achieving the effect of automatically locking the position of the roller shaft 8.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A permanent magnet drum self-locking backstop, comprising a backstop body (5), characterized in that: The backstop body (5) has a mounting hole (6) at its center. The mounting hole (6) has a keyway (7) on both the upper and lower sides. A roller shaft (8) is slidably connected inside the mounting hole (6). A protrusion (9) is fixedly connected on both the upper and lower sides of the roller shaft (8). Multiple limiting grooves (10) are provided on both sides of the inner wall of the protrusion (9). The outer wall of the protrusion (9) is slidably connected inside the keyway (7). Multiple limiting components are provided on both sides of the inner wall of the keyway (7). The limiting grooves (10) and the limiting components are arranged in a linear array. The limiting assembly includes a limiting ball (11), the outer wall of which is slidably connected to the inside of the limiting groove (10), a limiting plate (12) is fixedly connected to the side wall of the limiting ball (11), the outer wall of the limiting plate (12) is slidably connected to the inside of the backstop body (5), a limiting spring (13) is provided on the side of the limiting plate (12), one end of the limiting spring (13) is fixedly connected to the side wall of the limiting plate (12), and the other end of the limiting spring (13) is fixedly connected to the inside of the backstop body (5).

2. The permanent magnet drum self-locking backstop according to claim 1, characterized in that: The bottom of the backstop body (5) is provided with a fixing component, which includes a fixing platform (1). The four corners of the fixing platform (1) are threaded with fixing bolts (2), which are used to fix the fixing platform (1).

3. A permanent magnet drum self-locking backstop according to claim 2, characterized in that: The bottom of the stopper body (5) is fixedly connected to a fixing plate (4), the bottom of the fixing plate (4) is fixedly connected to a connecting plate (3), and both sides of the connecting plate (3) are fixedly connected to fixing blocks (14). The outer walls of the connecting plate (3) and the fixing blocks (14) are slidably connected inside the fixing platform (1).

4. A permanent magnet drum self-locking backstop according to claim 3, characterized in that: The top of the fixed blocks (14) on both sides are provided with symmetrical guide grooves (15), and the guide grooves (15) are slidably connected with linkage handles (18).

5. A permanent magnet drum self-locking backstop according to claim 4, characterized in that: The bottom of the linkage handle (18) is fixedly connected to a connecting circular plate (17), and the outer wall of the connecting circular plate (17) is slidably connected inside the fixed block (14).

6. A permanent magnet drum self-locking backstop according to claim 5, characterized in that: A locking post (16) is provided on one side of the connecting circular plate (17), and a return spring (19) is provided on the other side of the connecting circular plate (17).

7. A permanent magnet drum self-locking backstop according to claim 6, characterized in that: One end of the locking post (16) is fixedly connected to the side wall of the connecting circular plate (17), and the other end of the locking post (16) is inserted into the interior of the fixing platform (1). The locking post (16) is used to fix the position of the fixing platform (1) and the fixing block (14).

8. A permanent magnet drum self-locking backstop according to claim 7, characterized in that: One end of the reset spring (19) is fixedly connected inside the fixed block (14), and the other end of the reset spring (19) is fixedly connected to the side wall of the connecting circular plate (17).

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