A 3D printing-based complex structure gradient part product heat treatment equipment

Abstract

The application discloses a kind of complex structure gradient part product heat treatment equipment based on 3D printing, it is related to 3D printing product forming technical field.The tail end of the mechanical arm is fixedly installed with heat processor, the upper end surface of the support plate is fixedly installed with U-shaped frame plate, the upper end surface of the U-shaped frame plate is fixedly installed with mounting ring, the mounting ring is fixedly installed with U-shaped fixed plate, driving assembly is arranged on the U-shaped frame plate and U-shaped fixed plate, and placing platform is arranged on the driving assembly;Preprocessing assembly is arranged on the support plate, exhaust spray is arranged on the preprocessing assembly, and the driving assembly includes mounting plate fixedly installed on the U-shaped frame plate.The cooperation of the driving assembly and auxiliary assembly can accurately adjust the height of the placing platform, uniformly distribute hot air flow, and automatically control the heat treatment process, significantly improve the forming effect of 3D printed parts, and greatly improve the use effect of the equipment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of 3D printing product forming, in particular to a complex structure gradient part product heat treatment equipment based on 3D printing. BACKGROUND

[0002] In the field of mechanical engineering and materials science, gears, bearings, blades and other parts with direction-dependent performance due to design or manufacturing process are usually referred to as "anisotropic parts" or "structure / function gradient parts", among which 3D printing can freely realize complex part forming, and 3D printing (also known as additive manufacturing) is a technology that manufactures three-dimensional objects by layering materials. It is contrary to traditional subtractive manufacturing (such as cutting and carving), and generates solid objects directly from digital models.

[0003] After the product is completed by using 3D printing, in order to ensure the use effect of the product, the product needs to be heat treated, and the strength and stability of the part are improved by uniformly heating and slowly cooling to release the stress. During the heating process of the product, if the heat flow transmission system (such as nozzle, pipeline, etc.) is designed unreasonably or not accurately adjusted, the heat flow may not uniformly cover the entire 3D printed part, resulting in overheating in some parts and insufficient heat in other parts, which will ultimately affect the quality of the product. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a complex structure gradient part product heat treatment equipment based on 3D printing, which solves the problems mentioned in the background art.

[0005] To achieve the above purpose, the present application realizes the following technical scheme:

[0006] A complex structure gradient part product heat treatment equipment based on 3D printing, comprising a mechanical arm and a support plate, a heat treatment device is fixedly installed at the tail end of the mechanical arm, a U-shaped bracket plate is fixedly installed on the upper end surface of the support plate, an installation ring is fixedly installed on the upper end surface of the U-shaped bracket plate, a U-shaped fixed plate is fixedly installed on the installation ring, a driving assembly is arranged on the U-shaped bracket plate and the U-shaped fixed plate, and a placing platform is arranged on the driving assembly.

[0007] A pretreatment assembly is arranged on the support plate, and an exhaust nozzle is arranged on the pretreatment assembly.

[0008] Preferably, the driving assembly comprises a mounting plate fixedly installed on the U-shaped frame plate, a first motor fixedly installed on the mounting plate, a driving gear fixedly installed at the output end of the first motor, a driven gear rotatably installed on the outer side of the mounting ring, a lifting column fixedly installed on the driven gear, a lifting rod slidably installed in the lifting column, an adjusting column slidably installed on the U-shaped fixed plate, and a threaded hole formed at the bottom end of the adjusting column.

[0009] Preferably, a second motor is fixedly installed on the front surface of the U-shaped frame plate, a driving rod is fixedly installed at the output end of the second motor, a main bevel gear is fixedly installed on the driving rod, an adjusting screw rod is rotatably installed on the U-shaped frame plate, and a secondary bevel gear is fixedly installed at the bottom end of the adjusting screw rod.

[0010] Preferably, the driving gear and the driven gear are in the same horizontal plane, the driving gear and the driven gear are driven by a chain, the bottom end of the adjusting screw rod extends to the inside of the U-shaped frame plate, the main bevel gear is engaged with the secondary bevel gear, the top end of the adjusting screw rod extends to the inside of the threaded hole, and is threadedly installed with the threaded hole.

[0011] Preferably, the pretreatment assembly comprises a hot air fan fixedly installed on the support plate, a shunt pipe fixedly communicated with the output end of the hot air fan, a first hose fixedly communicated with the end of the shunt pipe away from the hot air fan, a V-shaped frame plate fixedly installed on the outer side of the support plate, a lifting sliding groove formed on the V-shaped frame plate, a lifting sliding block slidably installed in the lifting sliding groove, and a connecting pipe fixedly installed on the lifting sliding block.

[0012] Preferably, an L-shaped frame plate is fixedly installed on the lifting sliding block, a mounting frame plate is fixedly installed on the L-shaped frame plate, a limiting arc groove is formed in the inside of the mounting frame plate, a limiting arc block is slidably installed in the limiting arc groove, a circular plate is fixedly installed on the limiting arc block, an auxiliary tooth block is fixedly installed on the outer side of the circular plate, an L-shaped connecting pipe is fixedly installed on the circular plate, and a second hose is fixedly communicated with one end of the L-shaped connecting pipe.

[0013] Preferably, a U-shaped tooth plate is fixedly installed on the inner side of the V-shaped frame plate, a first tooth block and a second tooth block are formed in a cross arrangement on the inner side of the U-shaped tooth plate, a lifting screw rod is fixedly installed on the upper end surface of the driving gear, a lifting screw block is movably installed on the lifting screw rod, a connecting frame rod is fixedly installed on the lifting screw block, and a stable plate is fixedly installed on the side end surface of the support plate.

[0014] Preferably, the shunt pipe is fixedly installed on the V-shaped frame plate, one end of the first hose away from the shunt pipe is fixedly communicated with the connecting pipe, one end of the second hose away from the L-shaped pipe is fixedly communicated with the connecting pipe, the auxiliary tooth block is in mesh with the first tooth block and the second tooth block in sequence, the exhaust nozzle is fixedly communicated with the L-shaped pipe, and one end of the connecting frame rod away from the lifting sliding block is slidingly installed with the lifting sliding block.

[0015] The application provides a 3D printing-based complex structure gradient part product heat treatment equipment.

[0016] 1、The 3D printing part needing heat treatment is placed on the placing platform, meanwhile, the main bevel gear on the driving rod is driven to rotate by the second motor, the adjusting lead screw is driven to rotate by the cooperation of the main bevel gear and the auxiliary bevel gear, the height of the placing platform is adjusted by the cooperation of the adjusting lead screw and the adjusting column and the cooperation of the lifting column and the lifting rod, then the heat treatment device is moved to the specified position by the mechanical arm, the 3D printing part is heat treated by the mechanical arm, meanwhile, the main gear is driven to rotate by the first motor, the driven gear is driven to rotate by the chain on the main gear, the placing platform is driven to rotate by the adjusting column on the driven gear, and the heat treatment effect of the 3D printing part is effectively improved by the cooperation of the rotatable placing platform and the heat treatment device on the mechanical arm, and the forming effect of the 3D printing part is improved.

[0017] 2、When the 3D printing part needs to be heat treated, the hot air flow generated by the starting of the hot fan is transported to the connecting pipe through the first hose on the shunt pipe, then is transported to the L-shaped pipe through the second hose on the connecting pipe, the hot air flow in the L-shaped pipe blows to the 3D printing part through the exhaust nozzle, meanwhile, the lifting lead screw is driven to rotate by the rotation of the main gear, the lifting sliding block on the lifting lead screw is limitedly slid in the lifting sliding groove by the cooperation of the connecting frame rod and the V-shaped frame plate, so that the exhaust nozzle on the U-shaped tooth plate is adjusted in the up-down position, the gas discharged by the exhaust nozzle better contacts the 3D printing part, and the heat pretreatment effect of the 3D printing part is effectively improved.

[0018] 3、When the U-shaped tooth plate reciprocatingly rises and falls with the lifting sliding block, the circular plate in the mounting frame plate is in the front-back swinging state by the cooperation of the auxiliary tooth block and the first tooth block and the second tooth block and the sliding of the limiting arc block in the limiting arc groove, the exhaust nozzle on the L-shaped pipe is driven to front-back swing by the front-back swinging circular plate, the uniform contact of the hot air flow and the 3D printing part is improved, and the forming effect of the 3D printing part is further improved.

[0019] 4、The application can precisely adjust the height of the placing platform, uniformly distribute the hot air flow, and automatically control the heat treatment process, thereby significantly improving the forming effect of the 3D printed part and greatly improving the use effect of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the application;

[0021] Figure 2 It is a schematic diagram of the structure of the placing platform in the application;

[0022] Figure 3 It is a sectional view of the support plate in the application;

[0023] Figure 4 It is a schematic diagram of the structure of the auxiliary assembly in the application;

[0024] Figure 5 It is a schematic diagram of the structure of the connecting frame rod in the application;

[0025] Figure 6 It is a schematic diagram of the structure of the L-shaped frame plate in the application;

[0026] Figure 7 It is a schematic diagram of part of the structure of the V-shaped frame plate in the application;

[0027] Figure 8 It is a schematic diagram of the structure of the U-shaped tooth plate in the application.

[0028] In the figure: 1, mechanical arm; 2, support plate; 3, heat treatment device; 4, U-shaped frame plate; 5, mounting ring; 6, U-shaped fixed plate; 7, placing platform; 8, mounting plate; 9, first motor; 10, driving gear; 11, driven gear; 12, lifting column; 13, lifting rod; 14, adjusting column; 15, threaded hole; 16, second motor; 17, driving rod; 18, main bevel gear; 19, adjusting screw; 20, auxiliary bevel gear; 21, hot air fan; 22, shunt pipe; 23, first hose; 24, V-shaped frame plate; 25, lifting chute; 26, lifting block; 27, connecting pipe; 28, L-shaped frame plate; 29, mounting frame plate; 30, limiting arc groove; 31, circular plate; 32, auxiliary tooth block; 33, L-shaped connecting pipe; 34, second hose; 35, U-shaped tooth plate; 36, first tooth block; 37, second tooth block; 38, lifting screw; 39, lifting screw block; 40, connecting frame rod; 41, stabilizing plate; 42, exhaust nozzle; 43, limiting arc block. DETAILED DESCRIPTION

[0029] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0030] Please refer to Figures 1-8 The application is a kind of heat treatment equipment for complex structure gradient parts based on 3D printing, which comprises a mechanical arm 1 and a support plate 2. The tail end of the mechanical arm 1 is fixedly installed with a heat treatment device 3. The upper end surface of the support plate 2 is fixedly installed with a U-shaped frame plate 4. The upper end surface of the U-shaped frame plate 4 is fixedly installed with a mounting ring 5. The mounting ring 5 is fixedly installed with a U-shaped fixed plate 6. The U-shaped frame plate 4 and the U-shaped fixed plate 6 are provided with a driving assembly. The driving assembly is provided with a placing platform 7. The driving assembly comprises a mounting plate 8 fixedly installed on the U-shaped frame plate 4. The mounting plate 8 is fixedly installed with a first motor 9. The output end of the first motor 9 is fixedly installed with a driving gear 10. The outer side surface of the mounting ring 5 is rotatably installed with a driven gear 11. The driven gear 11 is fixedly installed with a lifting column 12. The lifting column 12 is slidably installed with a lifting rod 13. The U-shaped fixed plate 6 is slidably installed with an adjusting column 14. The bottom end of the adjusting column 14 is provided with a threaded hole 15. The front surface of the U-shaped frame plate 4 is fixedly installed with a second motor 16. The output end of the second motor 16 is fixedly installed with a driving rod 17. The driving rod 17 is fixedly installed with a main bevel gear 18. The U-shaped frame plate 4 is rotatably installed with an adjusting screw 19. The bottom end of the adjusting screw 19 is fixedly installed with a secondary bevel gear 20. The driving gear 10 and the driven gear 11 are in the same horizontal plane. The driving gear 10 and the driven gear 11 are driven by a chain. The bottom end of the adjusting screw 19 extends to the inside of the U-shaped frame plate 4. The main bevel gear 18 is engaged with the secondary bevel gear 20. The top end of the adjusting screw 19 extends to the inside of the threaded hole 15 and is screw-mounted with the threaded hole 15. The mechanical arm 1 is a technology known to those skilled in the art, which is not described in detail here.

[0031] In the embodiment, the 3D printed part requiring heat treatment is placed on the placing platform 7, the main bevel gear 18 on the driving rod 17 is driven to rotate by the second motor 16, the adjusting lead screw 19 is driven to rotate by the cooperation of the main bevel gear 18 and the auxiliary bevel gear 20, the height of the placing platform 7 is adjusted by the cooperation of the adjusting lead screw 19 and the adjusting column 14 and the cooperation of the lifting column 12 and the lifting rod 13, then the heat treatment device 3 is moved to the specified position by the mechanical arm 1, the 3D printed part is heat treated by the mechanical arm 1, the driving gear 10 is driven to rotate by the first motor 9, the driven gear 11 is driven to rotate by the chain on the driving gear 10, the placing platform 7 is driven to rotate by the adjusting column 14 on the driven gear 11, and the heat treatment effect of the 3D printed part is effectively improved by the cooperation of the rotatable placing platform 7 and the heat treatment device 3 on the mechanical arm 1.

[0032] The bracket plate 2 is provided with a pretreatment assembly, and the pretreatment assembly is provided with an exhaust nozzle 42. The pretreatment assembly comprises a hot fan 21 fixedly installed on the bracket plate 2. The output end of the hot fan 21 is fixedly communicated with a shunt pipe 22. One end of the shunt pipe 22 away from the hot fan 21 is fixedly communicated with a first hose 23. The outer side of the bracket plate 2 is fixedly installed with a V-shaped bracket plate 24. The V-shaped bracket plate 24 is provided with a lifting sliding groove 25. The lifting sliding groove 25 is slidably installed with a lifting sliding block 26. The lifting sliding block 26 is fixedly installed with a connecting pipe 27. The lifting sliding block 26 is fixedly installed with an L-shaped bracket plate 28. The L-shaped bracket plate 28 is fixedly installed with a mounting frame plate 29. The inside of the mounting frame plate 29 is provided with a limiting arc groove 30. The limiting arc groove 30 is slidably installed with a limiting arc block 43. The limiting arc block 43 is fixedly installed with a circular plate 31. The outer side of the circular plate 31 is fixedly installed with an auxiliary tooth block 32. The circular plate 31 is fixedly installed with an L-shaped connecting pipe 33. One end of the L-shaped connecting pipe 33 is fixedly communicated with a second hose 34. The inner side of the V-shaped bracket plate 24 is fixedly installed with a U-shaped tooth plate 35. The inner side of the U-shaped tooth plate 35 is provided with a first tooth block 36 and a second tooth block 37 arranged in a cross manner. The upper end surface of the driving gear 10 is fixedly installed with a lifting lead screw 38. The lifting lead screw 38 is movably installed with a lifting screw block 39. The lifting screw block 39 is fixedly installed with a connecting bracket rod 40. The side end surface of the bracket plate 2 is fixedly installed with a stabilizing plate 41. The shunt pipe 22 is fixedly installed on the V-shaped bracket plate 24. One end of the first hose 23 away from the shunt pipe 22 is fixedly communicated with the connecting pipe 27. One end of the second hose 34 away from the L-shaped connecting pipe 33 is fixedly communicated with the connecting pipe 27. The auxiliary tooth block 32 is engaged with the first tooth block 36 and the second tooth block 37 in sequence. The exhaust nozzle 42 is fixedly communicated with the L-shaped connecting pipe 33. One end of the connecting bracket rod 40 away from the lifting screw block 39 is slidably installed with the lifting sliding block 26. The functions of the first hose 23 and the second hose 34 ensure that the exhaust nozzle 42 will not affect the normal delivery of the hot air flow when it is in the lifting and swinging state.

[0033] In this embodiment, when the 3D printed part needs to be heat treated, the hot air flow generated by the start of the hot fan 21 is transported into the connecting pipe 27 through the first hose 23 on the shunt pipe 22, and then transported into the L-shaped pipe 33 through the second hose 34 on the connecting pipe 27. The hot air flow in the L-shaped pipe 33 blows towards the 3D printed part through the exhaust nozzle 42. At the same time, the rotation of the driving gear 10 drives the lifting lead screw 38 to rotate. The lifting block 39 on the lifting lead screw 38 cooperates with the V-shaped frame plate 24 through the connecting frame rod 40 and the lifting sliding block 26 slides in the lifting sliding groove 25, so that the exhaust nozzle 42 on the U-shaped tooth plate 35 adjusts the position up and down, ensuring that the gas discharged by the exhaust nozzle 42 better contacts the 3D printed part, effectively improving the effect of heat pretreatment of the 3D printed part. When the U-shaped tooth plate 35 reciprocatingly rises and falls with the lifting sliding block 26, the circular plate 31 in the mounting frame plate 29 swings back and forth through the cooperation of the auxiliary tooth block 32 with the first tooth block 36 and the second tooth block 37, and the limiting arc block 43 slides in the limiting arc groove 30, so that the circular plate 31 swings back and forth. The exhaust nozzle 42 on the L-shaped pipe 33 swings back and forth to improve the uniform contact of the hot air flow with the 3D printed part.

[0034] Working principle: in use, the 3D printed parts that need to be heat treated are placed on the placement platform 7, at the same time, the main bevel gear 18 on the drive rod 17 is driven to rotate by the second motor 16, the adjustment lead screw 19 is driven to rotate by the cooperation of the main bevel gear 18 and the auxiliary bevel gear 20, the height of the placement platform 7 is adjusted by the cooperation of the adjustment lead screw 19 and the adjustment column 14, and the cooperation of the lifting column 12 and the lifting rod 13, the driving gear 10 is driven to rotate by the first motor 9, the driving gear 10 drives the driven gear 11 to rotate through the chain on the driving gear 10, the placement platform 7 is driven to rotate through the adjustment column 14 on the driven gear 11, when the 3D printed parts need to be heat treated, the hot air flow generated by the starting of the hot fan 21 is transported into the connecting pipe 27 through the first hose 23 on the shunt pipe 22, and then transported into the L-shaped pipe 33 through the second hose 34 on the connecting pipe 27, the hot air flow in the L-shaped pipe 33 blows to the 3D printed parts through the exhaust nozzle 42, at the same time, the lifting lead screw 38 is driven to rotate by the rotation of the driving gear 10, the lifting block 39 on the lifting lead screw 38 is limited to slide in the lifting sliding groove 25 through the cooperation of the connecting frame rod 40 and the V-shaped frame plate 24, so that the exhaust nozzle 42 on the U-shaped tooth plate 35 is adjusted in the up-down position, ensuring that the gas discharged by the exhaust nozzle 42 better contacts the 3D printed parts, when the U-shaped tooth plate 35 reciprocatingly rises and falls with the lifting block 26, the circular plate 31 in the mounting frame plate 29 is in a state of forward and backward swinging through the cooperation of the auxiliary tooth block 32, the first tooth block 36 and the second tooth block 37, and the sliding of the limiting arc block 43 in the limiting arc groove 30, the circular plate 31 is used to drive the exhaust nozzle 42 on the L-shaped pipe 33 to swing forward and backward, which improves the uniform contact of the hot air flow with the 3D printed parts, after the preheating treatment of the 3D printed parts is completed, the heat treatment device 3 is moved to the specified position by the mechanical arm 1, the 3D printed parts are heat treated by the mechanical arm 1, and the heat treatment effect of the 3D printed parts is effectively improved through the cooperation of the rotatable placement platform 7 and the heat treatment device 3 on the mechanical arm 1.

[0035] It should be noted that, in this text, relational terms such as first and second are used only to distinguish one entity or action from another, without necessarily requiring or implying any such actual relationship or order between these entities or actions. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0036] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and changes can be made by those skilled in the art without departing from the spirit and principles of the present application.

Claims

1. A heat treatment apparatus for complex structure gradient parts products based on 3D printing, comprising a mechanical arm (1) and a support plate (2), characterized in that: The tail end of the mechanical arm (1) is fixedly installed with a heat processor (3), the upper end surface of the support plate (2) is fixedly installed with a U-shaped frame plate (4), the upper end surface of the U-shaped frame plate (4) is fixedly installed with a mounting ring (5), the mounting ring (5) is fixedly installed with a U-shaped fixed plate (6), the U-shaped frame plate (4) and the U-shaped fixed plate (6) are provided with a driving assembly, the driving assembly is provided with a placing platform (7), the driving assembly comprises a mounting plate (8) fixedly installed on the U-shaped frame plate (4), a first motor (9) fixedly installed on the mounting plate (8), a driving gear (10) fixedly installed on the output end of the first motor (9), a driven gear (11) rotatably installed on the outer side of the mounting ring (5), a lifting column (12) fixedly installed on the driven gear (11), a lifting rod (13) slidably installed in the lifting column (12), an adjusting column (14) slidably installed on the U-shaped fixed plate (6), a threaded hole (15) formed in the bottom end of the adjusting column (14), a second motor (16) fixedly installed on the front surface of the U-shaped frame plate (4), a driving rod (17) fixedly installed on the output end of the second motor (16), a main bevel gear (18) fixedly installed on the driving rod (17), an adjusting lead screw (19) rotatably installed on the U-shaped frame plate (4), a secondary bevel gear (20) fixedly installed on the bottom end of the adjusting lead screw (19), the driving gear (10) and the driven gear (11) are in the same horizontal plane, the driving gear (10) and the driven gear (11) are driven by a chain, the bottom end of the adjusting lead screw (19) extends to the inside of the U-shaped frame plate (4), the main bevel gear (18) is engaged with the secondary bevel gear (20), the top end of the adjusting lead screw (19) extends to the inside of the threaded hole (15) and is screw-mounted with the threaded hole (15); The support plate (2) is provided with a pretreatment assembly, the pretreatment assembly is provided with an exhaust nozzle (42), the pretreatment assembly includes a hot fan (21) fixedly installed on the support plate (2), the output end of the hot fan (21) is fixedly communicated with a shunt pipe (22), one end of the shunt pipe (22) away from the hot fan (21) is fixedly communicated with a first hose (23), the outer side of the support plate (2) is fixedly installed with a V-shaped frame plate (24), the V-shaped frame plate (24) is provided with a lifting chute (25), the lifting chute (25) is slidably installed with a lifting sliding block (26), the lifting sliding block (26) is fixedly installed with a connecting pipe (27), the lifting sliding block (26) is fixedly installed with an L-shaped frame plate (28), the L-shaped frame plate (28) is fixedly installed with a mounting frame plate (29), the inside of the mounting frame plate (29) is provided with a limiting arc groove (30), the limiting arc groove (30) is slidably installed with a limiting arc block (43), the limiting arc block (43) is fixedly installed with a circular plate (31), the outer side of the circular plate (31) is fixedly installed with an auxiliary tooth block (32), the circular plate (31) is fixedly installed with an L-shaped connecting pipe (33), one end of the L-shaped connecting pipe (33) is fixedly communicated with a second hose (34), the inner side of the V-shaped frame plate (24) is fixedly installed with a U-shaped tooth plate (35), the inner side of the U-shaped tooth plate (35) is provided with a first tooth block (36) and a second tooth block (37) arranged in cross, the upper end surface of the driving gear (10) is fixedly installed with a lifting lead screw (38), the lifting lead screw (38) is movably installed with a lifting screw block (39), the lifting screw block (39) is fixedly installed with a connecting frame rod (40), the side end surface of the support plate (2) is fixedly installed with a stable plate (41), the shunt pipe (22) is fixedly installed on the V-shaped frame plate (24), one end of the first hose (23) away from the shunt pipe (22) is fixedly communicated on the connecting pipe (27), one end of the second hose (34) away from the L-shaped connecting pipe (33) is fixedly communicated on the connecting pipe (27), the auxiliary tooth block (32) is engaged with the first tooth block (36) and the second tooth block (37) in sequence, the exhaust nozzle (42) is fixedly communicated on the L-shaped connecting pipe (33), one end of the connecting frame rod (40) away from the lifting screw block (39) is slidably installed with the lifting sliding block (26).

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