Double-lead worm and gear speed reducer

Abstract

The double-lead worm and gear speed reducer comprises a shell, a threaded rod is rotationally arranged in the shell, a lifting nut capable of moving up and down is arranged on the outer side of the threaded rod, and the lifting nut is connected with the threaded rod in a matched mode through a tooth-shaped roller structure. The device is characterized in that a bearing seat is arranged at the top of the threaded rod, the threaded rod is rotatably connected with the bearing seat in a matched mode, a top cover is arranged at the top of the shell, a lower side barrel is fixed to the top of the top cover, and a lubricating oil circulating system is arranged on the top of the top cover. The first liquid pump and the second liquid pump work, so that lubricating oil flows along the liquid storage tank, the second liquid pump, the second pipeline, the liquid inlet pipe, the upper side barrel, the lifting nut, the lower side barrel, the shell, the three-way pipe, the first liquid pump and the first pipeline, the lubricating oil is in a low-impurity state, the working life of the whole transmission system is prolonged, and the efficiency of the whole transmission system is improved.

Description

Technical Field

[0001] This invention relates to the field of worm gear reducer technology, specifically a double-lead worm gear reducer. Background Technology

[0002] Existing dual-lead worm gear reducers generally use a closed housing for grease filling or intermittent manual oil filling. Under short-stroke, high-frequency forward and reverse rotation conditions, the toothed roller pair and the worm gear pair generate a large amount of heat due to continuous shearing, causing the grease to age rapidly and impurities to be unable to be discharged in time, resulting in accelerated wear, excessive temperature rise, and decreased transmission accuracy. At the same time, the traditional structure lacks a continuous lubricating oil circulation and filtration system, and once the lubricating oil becomes contaminated, the entire machine must be disassembled and cleaned, resulting in long maintenance cycles. Therefore, there is an urgent need for a dual-lead worm gear reducer that integrates forced circulation filtration, multi-layer sealing, and a filter element that can be quickly removed and cleaned, to solve the problems of impurity retention and difficult maintenance in existing technologies. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a dual-lead worm gear reducer, which can solve the problems in the prior art.

[0004] This invention is achieved through the following technical solution: A dual-lead worm gear reducer of this invention includes a housing, in which a threaded rod is rotatably disposed; a lifting nut that moves up and down is disposed on the outer side of the threaded rod; the lifting nut is connected to the threaded rod through a toothed roller structure; a worm gear structure is disposed within the housing to reduce the speed of the threaded rod; characterized in that a bearing seat is disposed at the top of the threaded rod, and the threaded rod is rotatably connected to the bearing seat; a top cover is disposed at the top of the housing; the top of the top cover... A lower cylinder is fixed and communicates with the interior of the housing. An upper cylinder is fixed to the bottom of the bearing seat. A three-way pipe is connected to the bottom of the housing. The lifting nut is slidably connected to the upper and lower cylinders. An inlet pipe is provided on one side of the upper cylinder. A lubricating oil circulation system is connected to one side of the inlet pipe and the three-way pipe. The lubricating oil flows downward from the inlet pipe and the upper cylinder to the lifting nut, the lower cylinder, and the housing through the lubricating oil circulation system. After being filtered by the filter element structure of the three-way pipe, it flows back to the lubricating oil circulation system.

[0005] In a further technical solution, the top cover extends into the housing and is threadedly connected to the housing. A set screw is also provided inside the top cover to position and fix it to the housing.

[0006] A further technical solution includes a toothed roller structure comprising a connecting plate fixed inside the lifting nut. Two connecting plates are provided and located at the upper and lower ends of the lifting nut. Multiple planetary screws are rotatably arranged inside the connecting plates. A helical second thread is fixed on the outer surface of the planetary screws. A toothed profile is fixed inside the lifting nut. The second thread meshes with the toothed profile. A first thread is fixed on the outer surface of the threaded rod. A second thread is fixed on the outer surface of the planetary screws. A third thread is fixed inside the lifting nut. Rollers are rolled between the first thread, the second thread, and the third thread.

[0007] A further technical solution includes a worm gear structure comprising a worm rotatably disposed within the housing, a worm wheel rotatably disposed within the housing, a threaded rod inserted into the worm wheel and connected by a keyway and a key, and the threaded rod being fixed within the worm wheel.

[0008] In a further technical solution, a fixing cylinder is fixed at the upper and lower ends of the lifting nut, an annular block is fixed on the outer surface of the fixing cylinder, a sealing ring is sleeved on the outer surface of the annular block, and the sealing ring is slidably connected to the inner wall of the lower cylinder and the upper cylinder.

[0009] A further technical solution is to fix a limiting cover plate at the lower end of the upper cylinder and the upper end of the lower cylinder.

[0010] A further technical solution includes a filter element structure comprising a filter cartridge disposed within the three-way pipe, wherein a filter element is disposed within the filter cartridge, lubricating oil enters from the upper side of the three-way pipe and flows out from the side of the three-way pipe after being filtered by the filter cartridge and the filter element, the outer surface of the filter element is provided with multiple through holes, the outer surface of the filter cartridge is provided with multiple filter grooves, the filter element is inserted into the filter cartridge such that the through holes communicate with the filter grooves, the outer surface of the filter cartridge is provided with a liquid inlet hole, and the liquid inlet hole communicates with the top channel of the three-way pipe.

[0011] In a further technical solution, a threaded hole is provided inside the tee pipe, and a threaded post is provided on the outer surface of the filter cartridge, with the threaded post and the threaded hole being threadedly connected.

[0012] In a further technical solution, a fixing ring is fixed to the outer surface of the filter element, a side plate is fixed to the outer surface of the fixing ring, a slot is fixed inside the filter cartridge, and a through hole is provided on one side of the slot.

[0013] A further technical solution includes a lubricating oil circulation system comprising a reservoir, with an oil plug threadedly connected to the top of the reservoir. A second pipe is connected inside the reservoir, and a second pump is connected to one side of the second pipe. The second pump is connected to the reservoir, and the second pipe is fixed to the inlet pipe. A first pipe is connected to the upper side of the reservoir, and a first pump is connected to one side of the first pipe. The first pump is connected to the lateral outlet of the tee pipe.

[0014] The beneficial effects of this invention are as follows: First, through the lubricating oil circulation system, the first and second liquid pumps operate, causing the lubricating oil to flow along the reservoir, the second liquid pump, the second pipe, the inlet pipe, the upper cylinder, the lifting nut, the lower cylinder, the shell, the three-way pipe, the first liquid pump, and the first pipe, and then flow back into the reservoir. The three-way pipe retains impurities larger than the filter element and filter cartridge, so that the lubricating oil is in a low-impurity state, thereby improving the working life and efficiency of the entire transmission system. This reducer is suitable for working conditions with short moving dimensions and frequent forward and reverse continuous operation, where the heat generated is large and the tooth wear is severe. This reducer can effectively overcome this problem.

[0015] Second, the cylindrical structure composed of the fixed cylinder, the annular block and the sealing ring ensures that the lifting nut remains in communication with the upper and lower cylinders during lifting and lowering, allowing the lubricating oil to flow normally from top to bottom.

[0016] Third, impurities in the lubricating oil settle to the bottom of the three-way pipe due to gravity and are filtered and intercepted by the filter element structure. The filter cylinder and filter element set in the three-way pipe can filter impurities in layers. After the lubricating oil enters through the inlet hole in the filter cylinder, the filter groove buffers and separates the impurities. The through holes set in the filter element can effectively separate the impurities and allow the lubricating oil to flow out from the left side of the filter element. Attached Figure Description

[0017] For ease of explanation, the present invention will be described in detail below with reference to specific embodiments and accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the overall structure of a dual-lead worm gear reducer according to the present invention; Figure 2 for Figure 1 Internal structure diagram of the equipment; Figure 3 for Figure 2 A schematic diagram at point A in the middle; Figure 4 for Figure 3 A schematic diagram at point B in the middle; Figure 5 for Figure 3 A schematic diagram at point C in the middle; Figure 6 for Figure 2 Schematic diagram of the structure of a center tee pipe; Figure 7 for Figure 6 A schematic diagram showing the connection between the middle filter cartridge and the three-way pipe; Figure 8 for Figure 7 A schematic diagram at point D in the middle; Figure 9 for Figure 7 Schematic diagram of the rear structure of the middle filter cartridge and the three-way pipe; Figure 10 for Figure 1 A schematic diagram of the structure of the equipment after the circulation device is installed; Figure 11 for Figure 1 A schematic diagram of the equipment installed on the workbench; Figure 12 This is a schematic diagram of a common dual-lead worm gear reducer in this field. Figure 13 for Figure 12 A schematic diagram of the internal structure of a common dual-lead worm gear reducer in this field; Figure 14 for Figure 1 Schematic diagram of the installation structure of the equipment; In the figure, the components are: housing 12, worm gear 13, lower cylinder 14, outer flange 15, lifting nut 16, upper cylinder 17, top plate 18, bearing seat 19, inlet pipe 21, threaded rod 22, tee pipe 23, filter cartridge 24, filter element 25, worm gear 26, top cover 27, planetary screw 31, limiting cover plate 32, fixed cylinder 33, first thread 41, third thread 42, tooth profile 44, connecting plate 45, second thread 46, sealing ring 51, annular block 52, slot 61, through hole 62, fixing ring 63, side plate 64, filter groove 65, threaded hole 71, threaded column 72, inlet hole 73, first liquid pump 81, liquid storage tank 82, oil plug 83, second pipe 84, first pipe 85, and second liquid pump 86. Detailed Implementation

[0019] like Figures 1-14 As shown, the present invention will be described in detail. For ease of description, the directions mentioned below are defined as follows: the directions of up, down, left, right, front, and back mentioned below are the same as... Figure 1The projection relationships of the present invention are consistent in the up, down, left, right, front, and back directions. A dual-lead worm gear reducer includes a housing 12. A threaded rod 22 is rotatably disposed within the housing 12. A lifting nut 16, which moves vertically, is disposed on the outer side of the threaded rod 22. The lifting nut 16 is connected to the threaded rod 22 via a toothed roller structure, allowing the rotation of the threaded rod 22 to drive the lifting nut 16 to move vertically. A worm gear structure is disposed within the housing 12 to reduce the speed of the threaded rod 22. A bearing seat 19 is disposed on the top of the threaded rod 22, and the threaded rod 22 is rotatably connected to the bearing seat 19. A top cover 27 is disposed on the top of the housing 12, and a lower side is fixed to the top of the top cover 27. The lower cylinder 14 is connected to the interior of the housing 12. The upper cylinder 17 is fixed to the bottom of the bearing seat 19. A three-way pipe 23 is connected to the bottom of the housing 12. The lifting nut 16 extends into the upper cylinder 17 and the lower cylinder 14 and slides in communication with them. An inlet pipe 21 is provided on one side of the upper cylinder 17. The inlet pipe 21 and the three-way pipe 23 are connected to a lubricating oil circulation system. The lubricating oil flows downward from the inlet pipe 21 and the upper cylinder 17 to the lifting nut 16, the lower cylinder 14 and the housing 12 through the lubricating oil circulation system. After being filtered by the filter structure of the three-way pipe 23, it flows back to the lubricating oil circulation system.

[0020] Advantageously, the top cover 27 extends into the housing 12 and is threadedly connected to the housing 12. The top cover 27 is also provided with a set screw for positioning and fixing with the housing 12.

[0021] Advantageously, an outer flange 15 is fixed to the outer surface of the lifting nut 16, and the outer flange 15 is used to install other workpieces to facilitate the lifting and moving of the workpieces.

[0022] Advantageously, the toothed roller structure includes a connecting plate 45 fixed inside the lifting nut 16. Two connecting plates 45 are provided and located at the upper and lower ends of the lifting nut 16. Multiple planetary screws 31 are rotatably arranged inside the connecting plate 45. The outer surface of the planetary screws 31 is fixed with a helical second thread 46. The lifting nut 16 is fixed with a tooth 44. The second thread 46 and the tooth 44 are meshed. The outer surface of the threaded rod 22 is fixed with a first thread 41. The outer surface of the planetary screws 31 is fixed with a second thread 46. The lifting nut 16 is fixed with a third thread 42. Rollers are rolled between the first thread 41, the second thread 46 and the third thread 42. The rotation of the threaded rod 22 drives the rollers to slide, thereby causing the lifting nut 16 to move up and down. The toothed roller structure realizes the deceleration cooperation between the threaded rod and the lifting nut through the meshing transmission of the planetary screws and the rollers.

[0023] Advantageously, the worm gear structure includes a worm 13 rotatably disposed within a housing 12, a worm wheel 26 rotatably disposed within the housing 12, a threaded rod 22 inserted into the worm wheel 26 and connected by a keyway and a key, a locking block provided on the outer surface of the threaded rod 22, the locking block fixing the threaded rod 22 in the worm wheel 26, the worm wheel 26 rotatably disposed within the housing 12 via a first bearing, and the worm 13 rotatably disposed within the housing 12 via a second bearing.

[0024] Advantageously, the upper and lower ends of the lifting nut 16 are fixed with a fixing cylinder 33, the outer surface of the fixing cylinder 33 is fixed with an annular block 52, the outer surface of the annular block 52 is fitted with a sealing ring 51, the sealing ring 51 is slidably connected with the inner wall of the lower cylinder 14 and the upper cylinder 17, the lower end of the upper cylinder 17 and the upper end of the lower cylinder 14 are fixed with a limiting cover plate 32, the limiting cover plate 32 prevents the annular block 52 from slipping out of the lower cylinder 14 or the upper cylinder 17.

[0025] Advantageously, the filter element structure includes a filter cartridge 24 disposed within a three-way pipe 23, a filter element 25 disposed within the filter cartridge 24, and a three-way pipe 23 having a three-way pipe structure. The top of the three-way pipe 23 is fixedly connected to the housing 12, so that the internal channel of the three-way pipe 23 communicates with the inside of the housing 12. Lubricating oil enters from the upper side of the three-way pipe 23, and after being filtered by the filter cartridge 24 and the filter element 25, it flows out from the side of the three-way pipe 23. The outer surface of the filter element 25 is provided with multiple through holes, and the outer surface of the filter cartridge 24 is provided with multiple filter grooves 65. The filter element 25 is inserted into the filter cartridge 24, so that the through holes communicate with the filter grooves 65. The outer surface of the filter cartridge 24 is provided with a liquid inlet hole 73, which communicates with the top channel of the three-way pipe 23.

[0026] Advantageously, the three-way pipe 23 is provided with a threaded hole 71, and the outer surface of the filter cylinder 24 is provided with a threaded post 72. The filter cylinder 24 is inserted into the three-way pipe 23, and the threaded post 72 is threadedly engaged with the threaded hole 71.

[0027] Advantageously, a fixing ring 63 is fixed on the outer surface of the filter element 25, a side plate 64 is fixed on the outer surface of the fixing ring 63, a slot 61 is fixed inside the filter cartridge 24, and a through hole 62 is provided on one side of the slot 61. After the side plate 64 slides into the through hole 62, the filter element 25 and the fixing ring 63 are rotated so that the side plate 64 slides and engages in the slot 61. At this time, the filter element 25 is located inside the filter cartridge 24.

[0028] Advantageously, the lubricating oil circulation system includes a reservoir 82, with an oil plug 83 threadedly connected to the top of the reservoir 82. A second pipe 84 is connected inside the reservoir 82, and a second pump 86 is connected to one side of the second pipe 84. The second pump 86 is connected to the reservoir 82. The second pipe 84 is connected and fixed to the inlet pipe 21 via a flange. A first pipe 85 is connected to the upper side of the reservoir 82, and a first pump 81 is connected to one side of the first pipe 85. The first pump 81 is connected to the transverse outlet of the tee pipe 23.

[0029] Advantageously, the second conduit 84 and the first conduit 85 can be made of flexible tubing.

[0030] Advantageously, the liquid reservoir 82 can be equipped with a heat dissipation structure (such as heat dissipation fins or a cooling fan) to reduce the temperature of the circulating lubricating oil.

[0031] Advantageously, the upper cylinder 17, the lifting nut 16, the lower cylinder 14, the shell 12, and the three-way pipe 23 are filled with lubricating oil. In the working state, the lubricating oil is also filled in the second pipe 84, the first pipe 85, the first liquid pump 81, and the second liquid pump 86. The lubricating oil stored in the liquid storage tank 82 does not need to fill the inside of the liquid storage tank 82, and a certain space can be reserved.

[0032] When installing and using this speed reducer, if Figure 14 As shown, it needs to be installed on the workbench, which has space for pipe connections. The top plate 18 also needs to be fixedly installed, usually in the body of other equipment. The motor is connected to the worm gear 13, and the workpiece to be lifted is installed on the outer flange 15. After the worm gear 13 rotates, it can drive the threaded rod 22 to rotate through the transmission of the worm wheel 26. After the threaded rod 22 rotates, it drives the lifting nut 16 to move up and down.

[0033] When an external lubricating oil circulation system is connected, the first liquid pump 81 and the second liquid pump 86 operate, causing the lubricating oil to flow along the reservoir 82, the second liquid pump 86, the second pipe 84, the inlet pipe 21, the upper cylinder 17, the lifting nut 16, the lower cylinder 14, the housing 12, the three-way pipe 23, the first liquid pump 81, and the first pipe 85, and then flow back into the reservoir 82. The three-way pipe 23 retains impurities larger than the filter element 25 and the filter cartridge 24, so that the lubricating oil is in a low-impurity state, thereby improving the working life and efficiency of the entire transmission system. In addition, the reservoir 82 is separately located outside the reducer, so that the heat has more contact with the external space during the circulation process, which also has a certain function of improving the heat dissipation effect. Especially after a radiator is installed in the reservoir 82, the heat dissipation effect is even better. The radiator includes heat dissipation fins or fans, etc., which directly dissipate heat from the reservoir 82.

[0034] During the up-and-down movement of the lifting nut 16, the sealing ring 51 on one side of the annular block 52 slides against the interior of the lower cylinder 14 and the upper cylinder 17, playing a sealing role, so that the lubricating oil will not leak from the lower cylinder 14 and the upper cylinder 17. This sealing state can also be maintained when the lifting nut 16 and the fixed cylinder 33 move up and down.

[0035] Lubricating oil enters through the top of the three-way pipe 23, and then enters the three-way pipe 23 through the liquid inlet 73. The filter tank 65 is used to retain impurities. The filter element 25 is set at the liquid outlet end of the filter cylinder 24, with an opening on its left side. Multiple through holes are provided on the outer surface of the filter element 25. The lubricating oil flows out through the through holes and then through the opening on the left side of the filter element 25, so that impurities smaller than the through hole size are retained in the filter element 25.

[0036] When disassembling and cleaning the filter cartridge 24, unscrew the oil plug 83, then start the first liquid pump 81 to pump the lubricating oil from the upper cylinder 17, lifting nut 16, lower cylinder 14, housing 12, and three-way pipe 23 into the storage tank 82. Then stop the first liquid pump 81 and rotate the threaded post 72 to disengage it from the threaded hole 71, allowing the filter cartridge 24 to be pulled out of the three-way pipe 23. After that, move to the fixing ring 63 and side plate 64, aligning the side plate 64 with the through hole 62. Then pull the filter element 25 out of the filter cartridge 24. Finally, clean the impurities from the filter element 25 and the filter cartridge 24.

[0037] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions conceived without creative effort should be included within the scope of protection of the present invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A dual-lead worm gear reducer, comprising a housing (12), wherein a threaded rod (22) is rotatably disposed within the housing (12), and a lifting nut (16) that moves vertically is disposed on the outer side of the threaded rod (22), the lifting nut (16) being connected to the threaded rod (22) through a toothed roller structure, and a worm gear structure is disposed within the housing (12) to enable the threaded rod (22) to reduce speed and drive. The reducer is characterized in that... The threaded rod (22) is provided with a bearing seat (19) at its top, and the threaded rod (22) is rotatably connected to the bearing seat (19). The housing (12) is provided with a top cover (27) at its top, and a lower cylindrical body (14) is fixed to the top of the top cover (27). The lower cylindrical body (14) communicates with the interior of the housing (12). The bearing seat (19) is fixed with an upper cylindrical body (17) at its bottom. A three-way pipe (23) is connected to the bottom of the housing (12). The lifting nut (16) It is slidably connected to the upper cylinder (17) and the lower cylinder (14). An inlet pipe (21) is provided on one side of the upper cylinder (17). The inlet pipe (21) and the three-way pipe (23) are connected to a lubricating oil circulation system. The lubricating oil flows down from the inlet pipe (21) and the upper cylinder (17) to the lifting nut (16), the lower cylinder (14) and the housing (12) through the lubricating oil circulation system. After being filtered by the filter structure of the three-way pipe (23), it flows back to the lubricating oil circulation system.

2. The dual-lead worm gear reducer according to claim 1, characterized in that: The top cover (27) extends into the housing (12) and is threadedly connected to the housing (12). The top cover (27) is also provided with a set screw to position and fix it to the housing (12).

3. The dual-lead worm gear reducer according to claim 1, characterized in that: The toothed roller structure includes a connecting plate (45) fixed inside the lifting nut (16). Two connecting plates (45) are provided and located at the upper and lower ends of the lifting nut (16). Multiple planetary screws (31) are rotatably arranged inside the connecting plate (45). A helical second thread (46) is fixed on the outer surface of the planetary screw (31). A tooth (44) is fixed inside the lifting nut (16). The second thread (46) meshes with the tooth (44). A first thread (41) is fixed on the outer surface of the threaded rod (22). A second thread (46) is fixed on the outer surface of the planetary screw (31). A third thread (42) is fixed inside the lifting nut (16). Rollers are rolled between the first thread (41), the second thread (46), and the third thread (42).

4. The dual-lead worm gear reducer according to claim 1, characterized in that: The worm gear structure includes a worm (13) rotatably disposed within the housing (12), a worm wheel (26) rotatably disposed within the housing (12), a threaded rod (22) inserted into the worm wheel (26) and connected by a keyway and a key, and the threaded rod (22) fixed in the worm wheel (26).

5. A dual-lead worm gear reducer according to claim 1, characterized in that: The upper and lower ends of the lifting nut (16) are fixed with a fixed cylinder (33). An annular block (52) is fixed on the outer surface of the fixed cylinder (33). A sealing ring (51) is sleeved on the outer surface of the annular block (52). The sealing ring (51) is slidably connected to the inner wall of the lower cylinder (14) and the upper cylinder (17).

6. A dual-lead worm gear reducer according to claim 5, characterized in that: Limiting cover plates (32) are fixed to the lower end of the upper cylinder (17) and the upper end of the lower cylinder (14).

7. A dual-lead worm gear reducer according to claim 1, characterized in that: The lubricating oil circulation system includes a reservoir (82), with an oil plug (83) threadedly connected to the top of the reservoir (82). A second pipe (84) is connected inside the reservoir (82), and a second pump (86) is connected to one side of the second pipe (84). The second pump (86) is connected to the reservoir (82). The second pipe (84) is fixed to the inlet pipe (21). A first pipe (85) is connected to the upper side of the reservoir (82), and a first pump (81) is connected to one side of the first pipe (85). The first pump (81) is connected to the transverse outlet of the three-way pipe (23).

8. A dual-lead worm gear reducer according to any one of claims 1-7, characterized in that: The filter element structure includes a filter cartridge (24) disposed inside the three-way pipe (23), and a filter element (25) disposed inside the filter cartridge (24). Lubricating oil enters from the upper side of the three-way pipe (23), and after being filtered by the filter cartridge (24) and the filter element (25), it flows out from the side of the three-way pipe (23). The outer surface of the filter element (25) is provided with multiple through holes, and the outer surface of the filter cartridge (24) is provided with multiple filter grooves (65). The filter element (25) is inserted into the filter cartridge (24) so ​​that the through holes are connected to the filter grooves (65). The outer surface of the filter cartridge (24) is provided with a liquid inlet hole (73), and the liquid inlet hole (73) is connected to the top channel of the three-way pipe (23).

9. A dual-lead worm gear reducer according to claim 8, characterized in that: The three-way pipe (23) is provided with a threaded hole (71), and the outer surface of the filter cylinder (24) is provided with a threaded post (72), which is threadedly connected to the threaded hole (71).

10. A dual-lead worm gear reducer according to claim 8, characterized in that: A fixing ring (63) is fixed on the outer surface of the filter element (25), a side plate (64) is fixed on the outer surface of the fixing ring (63), a slot (61) is fixed inside the filter cylinder (24), and a through hole (62) is provided on one side of the slot (61).

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