High temperature ion nitriding apparatus

Abstract

The application provides a high-temperature ionic nitriding equipment, which comprises a placing rack, a cover body and a supporting component, the top of the cover body is provided with a lifting ring, the supporting component comprises a supporting box, the top of the supporting box is provided with a lifting mechanism, the top of the lifting mechanism is provided with a top plate, and the two sides of the top plate are both provided with side plates, the top of the two sides of the supporting box is both provided with a fixed plate two, the outer side of the fixed plate two is symmetrically provided with a limiting mechanism at the upper center, one side of the lifting mechanism is provided with a connecting plate, the outer side of the connecting plate is provided with a cross beam, the two sides of the cross beam are both provided with a fixed column one, the side away from the cross beam of the fixed column one is provided with a fixed column two, the bottom of the fixed column two is provided with an air bag one, the bottom of the fixed column one is symmetrically provided with a protection structure, and the center of the bottom of the cross beam is provided with a hook. Through the lifting mechanism, the lifting and placing of the cover body are completed directly through the cross beam and the hook, without the need of additional lifting equipment, so that the matching cost and the site occupation area of the high-temperature ionic nitriding equipment are greatly reduced.

Description

Technical Field

[0001] This invention relates to a high-temperature ion nitriding device, belonging to the technical field of nitriding equipment. Background Technology

[0002] Vacuum ion nitriding equipment is a device that uses a nitrogen-containing rarefied gas in a vacuum container to ionize in a DC electric field, and the positive ions bombard the surface of metal parts to form a nitriding layer, thereby achieving surface hardening.

[0003] Existing vacuum ion nitriding equipment includes a cover and a placement rack. The cover is placed on the placement rack, which is used to place the metal parts to be nitrided. When the equipment is in operation, the cover is first lifted upwards using a lifting device so that the placement rack is fully exposed. Then, the metal parts to be nitrided are placed on the placement rack. Finally, the cover is put back on the placement rack so that it completely covers the placement rack. At this point, the nitriding treatment of the surface of the metal parts can begin.

[0004] The existing technical solutions mentioned above have the following drawbacks: after the cover is lifted, it is suspended above the placement frame. When workers place metal parts, they stand below the cover. If the cover falls due to a malfunction of the lifting equipment, it is easy to injure the workers, leading to a safety accident. Traditional lifting operations require a crane, which increases costs and occupies more space. The stability of crane lifting operations is also poor. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide a high-temperature ion nitriding device.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0007] A high-temperature ion nitriding device includes a placement rack, a cover, and a support component. The cover has a lifting ring on top. The support component includes a support box with a lifting mechanism on top. The lifting mechanism has a top plate on top and side plates on both sides. The top of both sides of the support box has a second fixing plate, and a limiting mechanism is symmetrically provided at the upper center of the outer side of the second fixing plate. The lifting mechanism has a connecting plate on one side, and a crossbeam is provided on the outer side of the connecting plate. The crossbeam has a first fixing column on both sides. The first fixing column is located away from the crossbeam and has a second fixing column. The bottom of the second fixing column has an airbag. The bottom of the first fixing column has a protective structure symmetrically provided. The bottom center of the crossbeam has a hook.

[0008] Furthermore, a side groove is provided on one side of the bottom of the side plate, and a limiting hole is provided inside the side groove.

[0009] Furthermore, the limiting mechanism includes a fixing bar, the bottom of which is fixed to the center of the outer side of the top of the fixing plate two. An L-shaped plate two is provided on the upper part of the fixing bar, a partition is provided on the upper part of the L-shaped plate two, a support rod is provided on the top of the partition, an elastic limiting rod is provided on the top of the support rod, and a spring is sleeved on the support rod between the elastic limiting rod and the partition. A driving arm is provided on the lower part of the L-shaped plate two, and the end of the driving arm away from the L-shaped plate two is movably connected to the lifting mechanism.

[0010] Furthermore, the lifting mechanism includes a motor, which is installed at the center of the bottom wall of the support box. The output end of the motor is connected to a lead screw, which passes through the support box and is movably connected at the bottom center of the top plate. A lifting plate is sleeved on the lead screw, and guide rods are inserted at all four ends of the lifting plate. The bottom of the guide rods is fixed to the top of the support box. An internal threaded sleeve that is threaded with the lead screw is provided in the middle of the lifting plate. An auxiliary part is provided on the side of the lifting plate away from the connecting plate, and the auxiliary part is connected to the airbag.

[0011] Furthermore, the auxiliary part includes a support plate, a first pressure plate at the bottom of the support plate, a second pressure plate at the bottom of the first pressure plate, an airbag at the bottom of the second pressure plate, a pad at the bottom of the airbag, the pad being fixed to the bottom side of the support box, and rails on both sides of the support box located on the top inner side of the pad, with sliding blocks on the rails, the outer sides of the sliding blocks being fixed to both sides of the inner wall of the second pressure plate; connecting pipes are connected to the top two sides of the support plate, the other end of the connecting pipes passing through the fixed post and communicating with the airbag, and a flexible hose is connected to the bottom of the connecting pipes, the flexible hose passing through the first pressure plate and the second pressure plate and communicating with the airbag.

[0012] Furthermore, a lower sleeve is fitted onto the guide rod at the bottom of the lifting plate, and the top of the lower sleeve is fixed to the bottom of the lifting plate.

[0013] Furthermore, the protective structure includes a hydraulic cylinder, a hydraulic rod inside the hydraulic cylinder, the hydraulic rod passing through the hydraulic cylinder, and a second slider at the bottom. A curved arm is symmetrically provided on the lower part of one side of the second slider, a support plate is provided at the lower part of the curved arm, and an L-shaped plate is symmetrically provided at the bottom of the support plate. A bushing is provided at each corresponding end of the L-shaped plate, a shaft is inserted through the middle of the bushing, a back plate is provided at one end of the shaft, and a fixing plate is provided at the top of the back plate. The fixing plate is fixed to the bottom of the hydraulic cylinder, the hydraulic rod passes through the fixing plate, and a groove is provided on the side of the back plate corresponding to the bushing for sliding cooperation with the second slider. A baffle plate and a stop plate are respectively provided on the outer side of the L-shaped plate.

[0014] Furthermore, the top of the shield is provided with a rubber pad, and the outer side of the top of the abutment is provided with a protruding plate.

[0015] The beneficial effects of this invention are:

[0016] By integrating a lifting mechanism consisting of a lead screw, an internal threaded sleeve, and a lifting plate onto the support box, the lifting and lowering of the cover can be completed directly through the crossbeam and hooks, eliminating the need for additional lifting equipment and significantly reducing the supporting costs and site area required for the high-temperature ion nitriding equipment. Simultaneously, the lead screw drive, combined with the guiding constraint of four guide rods, ensures a smooth lifting process without radial sway, enabling precise alignment of the high-temperature furnace cover and the placement rack, preventing damage to the sealing surface, and guaranteeing the sealing performance of the vacuum-sealed chamber required for the high-temperature ion nitriding process.

[0017] By setting up a limiting mechanism consisting of a fixing bar, an L-shaped plate, a drive arm, an elastic limiting rod, and a spring, the elastic limiting rod can automatically engage with the limiting hole in the side plate after the cover is raised to a predetermined height, forming a passive mechanical lock. This structure can avoid the risk of heavy furnace cover falling due to faults such as screw slippage, power failure, or transmission failure.

[0018] By installing an expandable protective structure at the bottom of the fixed column, after the cover is lifted, the hydraulic cylinder drives the slider two downwards, causing the bent arm and L-shaped plate one to rotate and unfold, allowing the baffle and the abutment plate to lie flat under the cover, forming a support barrier. The rubber pad on the top of the baffle plate can absorb the impact of falling objects, and together with the airbag one at the bottom of the fixed column two, a secondary buffer is achieved. After being compressed, the airbag one is connected to the airbag two through connecting pipes and hoses. After the airbag two is filled with gas, it presses against the second pressure plate to achieve lateral support. Even if the cover accidentally falls, it can effectively receive and buffer the impact, preventing injury to the operators loading and unloading workpieces below, and significantly reducing the safety hazards for personnel during the opening of the nitriding furnace.

[0019] By setting a lower sleeve on the guide rod that moves synchronously with the lifting plate, the cooperation length between the lifting plate and the guide rod is increased, the sway during the lifting process is reduced, and the stability of lifting heavy high-temperature furnace covers is further improved. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the furnace structure of a high-temperature ion nitriding device according to the present invention;

[0022] Figure 2 This is a schematic diagram of the overall structure of a high-temperature ion nitriding device according to the present invention;

[0023] Figure 3 This is a schematic diagram of the side plate structure of a high-temperature ion nitriding device according to the present invention;

[0024] Figure 4 This is a schematic diagram of the lifting mechanism of a high-temperature ion nitriding device according to the present invention;

[0025] Figure 5 This is a schematic diagram of the limiting mechanism structure of a high-temperature ion nitriding device according to the present invention;

[0026] Figure 6 This is a schematic diagram of the lifting plate structure of a high-temperature ion nitriding device according to the present invention;

[0027] Figure 7 This is a schematic diagram of the connection structure between the protective structure and the fixed column of a high-temperature ion nitriding device according to the present invention;

[0028] Figure 8 This is a schematic diagram of the protective structure of a high-temperature ion nitriding device according to the present invention.

[0029] In the diagram, 1. Placement rack; 2. Cover; 3. Support component; 4. Lifting ring; 5. Support box; 6. Top plate; 7. Fixing plate two; 8. Side plate; 9. Connecting plate; 10. Crossbeam; 11. Fixing column one; 12. Fixing column two; 13. Airbag one; 14. Protective structure; 15. Hook; 16. Side groove; 17. Limiting hole; 18. Limiting mechanism; 19. Fixing strip; 20. L-shaped plate two; 21. Partition; 22. Support rod; 23. Elastic limiting rod; 24. Spring; 25. Drive arm; 26. Lead screw; 27. Inner... 28. Threaded sleeve; 29. ​​Lifting plate; 30. Guide rod; 31. Convex plate; 32. Support plate; 33. First pressure plate; 34. Second pressure plate; 35. Airbag II; 36. Pad plate; 37. Track; 38. Slider I; 39. Connecting pipe; 40. Lower sleeve; 41. Hydraulic cylinder; 42. Hydraulic rod; 43. Slider II; 44. Bent arm; 45. Support plate; 46. L-shaped plate I; 47. Bushing; 48. Shaft; 49. Back plate; 50. Fixing plate I; 51. Slide groove; 52. Baffle plate; 53. Abutment plate; 54. Rubber pad. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figures 1-8This invention provides a technical solution for a high-temperature ion nitriding device, including a placement rack 1, a cover 2, and a support component 3. The cover 2 is provided with a lifting ring 4 at the top. The support component 3 includes a support box 5, a lifting mechanism at the top of the support box 5, a top plate 6 at the top of the lifting mechanism, and side plates 8 on both sides of the top plate 6. The top of both sides of the support box 5 is provided with a second fixing plate 7, and a limiting mechanism 18 is symmetrically provided at the upper center of the outer side of the second fixing plate 7. A connecting plate 9 is provided on one side of the lifting mechanism, and a crossbeam 10 is provided on the outer side of the connecting plate 9. A first fixing column 11 is provided on both sides of the crossbeam 10. A second fixing column 12 is provided on the side of the first fixing column 11 away from the crossbeam 10. An airbag 13 is provided at the bottom of the second fixing column 12. A protective structure 14 is symmetrically provided at the bottom of the first fixing column 11. A hook 15 is provided at the center of the bottom of the crossbeam 10.

[0032] See Figure 2-5 The side plate 8 has a side groove 16 on one side of its bottom, and a limiting hole 17 is provided inside the side groove 16. The limiting mechanism 18 includes a fixing strip 19, the bottom of which is fixed to the center of the outer side of the top of the second fixing plate 7. An L-shaped plate 20 is provided on the upper part of the fixing strip 19, and a partition 21 is provided on the upper part of the L-shaped plate 20. A support rod 22 is provided on the top of the partition 21, and an elastic limiting rod 23 is provided on the top of the support rod 22. A spring 24 is sleeved on the support rod 22 between the elastic limiting rod 23 and the partition 21. The lower part of the support box 5 is equipped with a drive arm 25, one end of which is movably connected to the lifting mechanism away from the L-shaped plate 20. The lifting mechanism includes a motor, which is installed at the center of the bottom wall of the support box 5. The output end of the motor is connected to a lead screw 26, which passes through the support box 5 and is movably connected at the bottom center of the top plate 6. A lifting plate 28 is sleeved on the lead screw 26. Guide rods 29 are inserted at all four ends of the lifting plate 28. The bottom of the guide rods 29 is fixed to the top of the support box 5. The middle part of the lifting plate 28 is... An internal threaded sleeve 27 is provided to engage with the lead screw 26; an auxiliary part is provided on the side of the lifting plate 28 away from the connecting plate 9, and the auxiliary part is connected to the first airbag 13; the auxiliary part includes a support plate 31, a first pressure plate 32 is provided at the bottom of the support plate 31, a second pressure plate 33 is provided at the bottom of the first pressure plate 32, a second airbag 34 is provided at the bottom of the second pressure plate 33, a pad 35 is provided at the bottom of the second airbag 34, the pad 35 is fixed to the bottom side of the support box 5, and rails 36 are provided on both sides of the inner side of the top of the pad 35 in the support box 5. The track 36 is provided with a sliding block 37, which is fixed to the outer sides of the inner wall of the second pressure plate 33. The top two sides of the support plate 31 are connected to the connecting pipe 38, the other end of the connecting pipe 38 passes through the fixed column 12 and communicates with the airbag 13. The bottom of the connecting pipe 38 is connected to the hose, which passes through the first pressure plate 32 and the second pressure plate 33 and communicates with the airbag 24. The guide rod 29 is fitted with a lower sleeve 39 at the bottom of the lifting plate 28, and the top of the lower sleeve 39 is fixed to the bottom of the lifting plate 28.

[0033] See Figures 6-8The protective structure 14 includes a hydraulic cylinder 40, a hydraulic rod 41 inside the hydraulic cylinder 40, the hydraulic rod 41 passing through the hydraulic cylinder 40, and a second slider 42 at the bottom. A bent arm 43 is symmetrically provided on the lower part of one side of the second slider 42, and a support plate 44 is provided at the lower part of the bent arm 43. An L-shaped plate 45 is symmetrically provided at the bottom of the support plate 44. A bushing 46 is provided at the corresponding end of the L-shaped plate 45. A shaft 47 is inserted in the middle of the bushing 46. A back plate 48 is provided at one end of the shaft 47. A fixing plate 49 is provided at the top of the back plate 48. The fixing plate 49 is fixed to the bottom of the hydraulic cylinder 40. The hydraulic rod 41 passes through the fixing plate 49. A groove 50 is provided on the side of the back plate 48 corresponding to the bushing 46, which slides and engages with the second slider 42. A shielding plate 51 and a stop plate 52 are respectively provided on the outer side of the L-shaped plate 45. A rubber pad 53 is provided on the top of the shielding plate 51, and a protruding plate 30 is provided on the outer side of the top of the stop plate 52.

[0034] The structures involved, such as circuits, electronic components, control modules, and equipment cavities with heat dissipation holes and maintenance doors, are all existing technologies that can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this application does not involve improvements to software and methods, or to heat dissipation and maintenance.

[0035] In operation, initially, the lifting plate 28 of the lifting mechanism is at its lower limit of travel, and the hook 15 at the bottom of the crossbeam 10 is engaged and fixed with the lifting ring 4 at the top of the cover 2. The motor is started, driving the lead screw 26 to rotate. The lead screw 26 and the internal threaded sleeve 27 form a helical transmission pair, driving the lifting plate 28 to move upwards at a constant speed along the guide rod 29. The lifting plate 28, through the connecting plate 9 on the side, drives the crossbeam 10 to rise synchronously. The hook 15 at the bottom of the crossbeam 10 pulls the lifting ring 4, smoothly lifting the cover 2 upwards, separating the cover 2 from the lower placement rack 1, exposing the workpiece loading area of ​​the placement rack 1, facilitating the placement of metal workpieces to be nitrided by the operator. During the lifting process, the four guide rods 29 provide circumferential limiting for the lifting plate 28. Combined with the lower sleeve 39 on the outer side of the guide rods 29, which extends the guiding stroke, the radial sway of the lifting plate 28 is effectively suppressed, ensuring the stability of the heavy-duty high-temperature furnace cover lifting process and preventing collisions between the cover 2 and the placement rack 1.

[0036] When the lifting plate 28 rises to the preset opening height, the limiting mechanism 18 simultaneously completes mechanical locking: the drive arm 25 rises with the lifting plate 28, generating relative displacement, pulling the L-shaped plate 20 to rotate and swing upwards around its hinge point with the fixing strip 19, driving the partition 21 and support rod 22 to rise simultaneously; when the elastic limiting rod 23 at the top of the support rod 22 aligns with the limiting hole 17 in the side groove 16 on one side of the bottom of the side plate 8, the spring 24 releases its elastic force to push the elastic limiting rod 23 into the limiting hole 17, forming a passive mechanical locking structure. At this time, even if the lead screw 26 experiences slippage or power failure, the engagement structure between the elastic limiting rod 23 and the limiting hole 17 can prevent the lifting plate from falling, achieving mechanical locking of the cover 2 position and ensuring structural safety under high temperature opening conditions.

[0037] After the cover is locked in place, the hydraulic cylinders 40 of the protective structures 14 on both sides are activated: the hydraulic rods 41 extend downward to push the second slider 42 vertically downward along the slide groove 50 of the back plate 48; when the second slider 42 moves downward, it drives the two curved arms 43 on both sides to move downward synchronously, and the lower end of the curved arms 43 pushes the support plate 44, causing the two sets of L-shaped plates 45 to rotate outward around the axis 47 and unfold. Finally, the shielding plate 51 and the abutment plate 52 are laid flat in a horizontal state, located within the projection range below the cover 2. The rubber pad 53 on the top of the baffle plate 51 forms a flexible bearing surface. The outer convex plate 30 of the abutment plate 52 widens the support span. After the convex plate 30 is unfolded, it presses against the side airbag 13. After the airbag 13 is compressed, the internal gas rushes into the airbag 2 34 through the connecting pipe 38, the hose inside the first pressure plate 32 and the second pressure plate 33. The airbag 2 34 expands and presses against the second pressure plate 33, which serves as an outer support and a fall protection barrier and buffer protection structure. The double protection structure completely avoids the safety risk of the high temperature furnace cover falling.

[0038] After the workpiece is loaded, the operator retreats to a safe area. First, the hydraulic cylinder 40 is controlled to retract, and the hydraulic rod 41 drives the slider 42 to move upward along the slide groove 50. The bent arm 43 pulls the L-shaped plate 45 to retract inward around the shaft 47, and the protective structure is reset. Then, the limiting mechanism 18 is unlocked, so that the elastic limiting rod 23 is disengaged from the limiting hole 17, and the mechanical lock is released.

[0039] The control motor reverses its rotation, driving the lead screw 26 to rotate in the opposite direction. The internal threaded sleeve 27 then drives the lifting plate 28 to descend smoothly along the guide rod 29, allowing the cover 2 to slowly snap onto the placement frame 1, forming a sealed vacuum reaction chamber. Next, the support component 3 is moved to the outside to prevent damage to the rubber pad and airbag from high temperatures. Once the support component 3 is in a safe area, the chamber is evacuated, and a rarefied nitrogen-containing gas is introduced. A DC electric field is applied to ionize the gas; under high temperature conditions, nitrogen ions bombard the workpiece surface, completing ion nitriding and achieving surface hardening modification.

[0040] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-temperature ion nitriding device, characterized in that, It includes a placement rack (1), a cover (2) and a support component (3), with a lifting ring (4) on the top of the cover (2); The support component (3) includes a support box (5), a lifting mechanism is provided on the top of the support box (5), a top plate (6) is provided on the top of the lifting mechanism, and side plates (8) are provided on both sides of the top plate (6); a second fixing plate (7) is provided on the top of both sides of the support box (5), and a limiting mechanism (18) is symmetrically provided at the upper center of the outer side of the second fixing plate (7); a connecting plate (9) is provided on one side of the lifting mechanism, a crossbeam (10) is provided on the outer side of the connecting plate (9), a first fixing column (11) is provided on both sides of the crossbeam (10), a second fixing column (12) is provided on the side of the first fixing column (11) away from the crossbeam (10), an airbag (13) is provided at the bottom of the second fixing column (12), a protective structure (14) is symmetrically provided at the bottom of the first fixing column (11), and a hook (15) is provided at the center of the bottom of the crossbeam (10).

2. The high-temperature ion nitriding equipment according to claim 1, characterized in that, The side plate (8) has a side groove (16) on one side of its bottom, and a limiting hole (17) is provided inside the side groove (16).

3. The high-temperature ion nitriding equipment according to claim 1, characterized in that, The limiting mechanism (18) includes a fixing bar (19), the bottom of which is fixed to the center of the outer side of the top of the fixing plate (7). The upper part of the fixing bar (19) is provided with an L-shaped plate (20), the upper part of the L-shaped plate (20) is provided with a partition (21), the top of the partition (21) is provided with a support rod (22), the top of the support rod (22) is provided with an elastic limiting rod (23), and a spring (24) is sleeved on the support rod (22) between the elastic limiting rod (23) and the partition (21). The lower part of the L-shaped plate (20) is provided with a driving arm (25), and the end of the driving arm (25) away from the L-shaped plate (20) is movably connected to the lifting mechanism.

4. The high-temperature ion nitriding equipment according to claim 1, characterized in that, The lifting mechanism includes a motor, which is installed at the center of the bottom wall of the support box (5). The output end of the motor is connected to a lead screw (26), which passes through the support box (5) and is movably connected at the bottom center of the top plate (6). A lifting plate (28) is sleeved on the lead screw (26). Guide rods (29) are inserted at all four ends of the lifting plate (28). The bottom of the guide rods (29) is fixed to the top of the support box (5). An internal thread sleeve (27) that is threaded with the lead screw (26) is provided in the middle of the lifting plate (28). An auxiliary part is provided on the side of the lifting plate (28) away from the connecting plate (9). The auxiliary part is connected to the airbag (13).

5. The high-temperature ion nitriding equipment according to claim 4, characterized in that, The auxiliary part includes a support plate (31), a first pressure plate (32) at the bottom of the support plate (31), a second pressure plate (33) at the bottom of the first pressure plate (32), an airbag (34) at the bottom of the second pressure plate (33), a pad (35) at the bottom of the airbag (34), the pad (35) is fixed to the bottom of the side of the support box (5), the support box (5) is provided with rails (36) on both sides of the top inner side of the pad (35), and a sliding slider (37) is provided on the rails (36), the outer side of the slider (37) is fixed to both sides of the inner wall of the second pressure plate (33); The top two sides of the support plate (31) are connected to the connecting pipe (38). The other end of the connecting pipe (38) passes through the second fixed column (12) and communicates with the first airbag (13). The bottom of the connecting pipe (38) is connected to the hose. The hose passes through the first pressure plate (32) and the second pressure plate (33) and communicates with the second airbag (34).

6. The high-temperature ion nitriding equipment according to claim 4, characterized in that, The guide rod (29) is fitted with a lower sleeve (39) at the bottom of the lifting plate (28), and the top of the lower sleeve (39) is fixed to the bottom of the lifting plate (28).

7. The high-temperature ion nitriding equipment according to claim 1, characterized in that, The protective structure (14) includes a hydraulic cylinder (40), a hydraulic rod (41) is provided inside the hydraulic cylinder (40), the hydraulic rod (41) passes through the hydraulic cylinder (40), and a second slider (42) is provided at the bottom. A curved arm (43) is symmetrically provided on the lower part of one side of the second slider (42), a support plate (44) is provided at the lower part of the curved arm (43), and an L-shaped plate (45) is symmetrically provided at the bottom of the support plate (44). A bushing (46) is provided at the corresponding end of the L-shaped plate (45). 6) A shaft (47) is inserted in the middle, and a back plate (48) is provided at one end of the shaft (47). A fixing plate (49) is provided at the top of the back plate (48). The fixing plate (49) is fixed at the bottom of the hydraulic cylinder (40). The hydraulic rod (41) passes through the fixing plate (49). The back plate (48) is provided with a sliding groove (50) on the side corresponding to the bushing (46) to slide with the slider (42). A baffle plate (51) and a stop plate (52) are provided on the outer side of the L-shaped plate (45).

8. The high-temperature ion nitriding equipment according to claim 7, characterized in that, The top of the shield (51) is provided with a rubber pad (53), and the outer side of the top of the abutment (52) is provided with a protruding plate (30).

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