Large-torque adjustable worm and gear speed reducer

Abstract

The invention provides a large-torque adjustable worm and gear speed reducer, and relates to the technical field of speed reducers. The large-torque adjustable worm and gear speed reducer comprises a bottom plate, a first machine box, a second machine box, a moving mechanism, a reciprocating mechanism, a lubricating mechanism and a filtering mechanism, an input shaft is arranged on the right side of the first machine box in a penetrating mode, the left side of the input shaft is sleeved with a sliding sleeve rod, and the outer wall of the left side of the sleeve rod is sleeved with a first gear and a second gear; a third gear and a fourth gear are correspondingly arranged on the upper side of the first gear and the upper side of the second gear, a rotating rod is fixedly connected to the middle of the third gear and the middle of the fourth gear, a worm is fixedly connected to the right side of the rotating rod, a worm gear is meshed with the upper side of the worm, and an output shaft is arranged in the middle of the worm gear. Through the design of the moving mechanism, the reciprocating mechanism, the lubricating mechanism and the filtering mechanism, adjustment of the reduction ratio is achieved, lubrication and filtering of lubricating oil are adapted, the use performance of the speed reducer is improved, and the service life of the speed reducer is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of speed reducers, and more particularly to a large-torque adjustable worm and worm gear speed reducer. Background Art

[0002] A worm and worm gear speed reducer is a power transmission mechanism that uses a worm and worm gear transmission mechanism to reduce the rotational speed of an electric motor to the desired rotational speed and obtain a larger torque. In the mechanism for transmitting power and motion, the speed reducer has a quite wide range of applications and can be found in the transmission systems of various types of machinery, from ships, automobiles, and locomotives in transportation, heavy machinery used in construction, processing machinery and automated production equipment used in the machinery industry, to household appliances and clocks commonly seen in daily life. Its applications range from large-power transmission work to small-load and precise angle transmission. Moreover, in industrial applications, the speed reducer has the functions of speed reduction and torque increase. Therefore, the worm and worm gear speed reducer is widely used in speed and torque conversion equipment.

[0003] Torque is a special moment that causes an object to rotate. The torque of an engine refers to the moment output from the crankshaft end of the engine. Under the condition of fixed power, it is inversely proportional to the rotational speed. The faster the rotational speed, the smaller the torque, and vice versa. In the application of a large-torque worm and worm gear speed reducer, it is necessary to overcome the problem of lubricating oil supply.

[0004] During the use of a worm and worm gear speed reducer, the worm and the worm gear inside it are prone to friction, which not only causes certain wear but also generates a relatively high temperature, thereby causing certain damage to the worm and the worm gear and affecting the normal use of the worm and worm gear speed reducer. In the prior art, lubricating oil is applied during operation to solve the wear problem. However, if too much lubricating oil is poured at one time, it is easy to cause waste, and it is not easy to control the pouring process of the lubricating oil, and it cannot be adaptively lubricated according to the rotational speed of the worm and worm gear. Secondly, the lubricating oil is directly discharged after use, resulting in waste. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the present invention provides a large-torque adjustable worm and worm gear speed reducer, which solves the problem that the lubricating oil cannot be adaptively lubricated according to the rotational speed of the worm and worm gear.

[0006] To achieve the above purpose, the present invention is implemented through the following technical solutions: a large torque adjustable worm gear reducer, comprising a base plate, a first chassis, a second chassis, and a moving mechanism, an input shaft is penetrated on the right side of the first chassis, a sliding sleeve rod is sleeved on the left side of the input shaft, the sleeve rod rotates following the rotation of the input shaft, the sleeve rod is moved by the moving mechanism, a first gear and a second gear are sleeved on the left outer wall of the sleeve rod, a third gear and a fourth gear are correspondingly arranged on the upper sides of the first gear and the second gear, a rotating rod is fixedly connected to the middle parts of the third gear and the fourth gear, a worm is fixedly connected to the right side of the rotating rod, a worm is meshed on the upper side of the worm, an output shaft is fixedly connected to the middle part of the worm wheel, and the output shaft penetrates to the outside of the first chassis; It also includes a reciprocating mechanism that follows the rotating rod to work in linkage and realizes a reciprocating action, and a lubricating mechanism that performs a lubricating action, wherein the reciprocating mechanism drives the lubricating mechanism to discharge oil and acts on the worm wheel and the worm; It also includes a filtering mechanism for filtering the lubricating oil.

[0007] Preferably, a positioning block is fixedly connected to the outer wall of the left end of the input shaft, and a slot adapted to the positioning block is provided inside the sleeve rod.

[0008] Preferably, the moving mechanism includes a fixed frame fixedly connected to the inner bottom wall of the first chassis, a knob is provided through the right side of the front side of the fixed frame, the outer end of the knob extends to the outside of the first chassis, the inner end of the knob is rotatably connected to a threaded rod through a second bevel gear set, the outer wall of the threaded rod is threadedly connected to a threaded block, the upper end of the threaded block is fixedly connected to a positioning bearing seat, and the positioning bearing seat is fixedly sleeved on the outer wall of the sleeve rod.

[0009] Preferably, the first gear and the third gear are a set of meshing gears, and the gear ratio between the first gear and the third gear is 2-3:1; The second gear and the fourth gear are a set of meshing gears, and the gear ratio between the second gear and the fourth gear is 1:2-3.

[0010] Preferably, the left outer wall of the rotating rod is rotatably connected to the first transmission rod through the first bevel gear set, the right side of the upper end of the first transmission rod is connected to the second transmission rod through a commutator, and the right end of the second transmission rod is connected to the reciprocating mechanism.

[0011] Preferably, the reciprocating mechanism includes a connecting frame fixedly connected to the inner wall of the second chassis. A rotating shaft rotatably connected to the second transmission rod is rotatably connected inside the connecting frame. A turntable is fixedly connected to the front end of the rotating shaft. A connecting rod is rotatably connected to the outer side of the front surface of the turntable. The right end of the connecting rod is rotatably connected to a sliding plate. A sliding rod is fixedly connected to the right side of the sliding plate. The right end of the sliding rod slidably penetrates into the inside of the extrusion cylinder.

[0012] Preferably, the lubricating mechanism includes an extrusion cylinder and an oil storage tank. Lubricating oil is stored inside the oil storage tank. The oil storage tank is communicated with the extrusion cylinder through a one-way pipe at its bottom. A guide rod is fixedly connected to the right end of the sliding rod. A piston is fixedly connected to the right end of the guide rod. An oil outlet head with one-way flow is provided at the bottom of the extrusion cylinder.

[0013] Preferably, the filtering mechanism includes a filtering box fixedly connected to the outer surface of the right side of the first chassis. The filtering box is used to introduce lubricating oil through a guiding plate inclined inside the first chassis. A connection port communicating with the first chassis is provided on the left side of the filtering box. An empty slot is formed on the inner wall of the left side of the filtering box. Two springs are fixedly connected to the inner wall of the empty slot. The other ends of the two springs are fixedly connected to a resisting plate. A filter plate is resisted by the right side of the resisting plate. A lock for locking the filter plate is provided on the right side of the filtering box. A discharge port is penetrated through the bottom of the right side of the filtering box.

[0014] The present invention provides a large-torque adjustable worm and worm gear reducer, which has the following beneficial effects: 1. Through the design of the moving mechanism of the present invention, the sleeve rod can be adjusted in position, so as to change the meshing degree between the first gear, the second gear, the third gear and the fourth gear, and further realize the adjustment of the reduction ratio of the reducer, realize the adjustable torque of the reducer, meet the requirements of different working scenarios, and improve the applicability and flexibility of the reducer.

[0015] 2. Through the design of the reciprocating mechanism and the lubricating mechanism of the present invention, during the operation of the worm and worm gear reducer, the reciprocating mechanism is driven to work, so that the piston in the extrusion cylinder makes a reciprocating motion, thereby realizing the suction and extrusion of the lubricating oil, enabling the lubricating oil to be adaptively applied to the worm and the worm gear, achieving a good lubricating effect, realizing adaptive lubrication according to the rotation speed of the worm and the worm gear, avoiding the waste caused by excessive pouring of the lubricating oil at one time, and at the same time solving the problem that it is not easy to control during the pouring process of the lubricating oil. Through the reciprocating motion of the reciprocating mechanism.

[0016] 3. Through the design of the filtering mechanism of the present invention, after the lubricating oil is used up, it can be filtered through the filtering box to remove impurities and particulate matters therein, thereby ensuring the purity of the lubricating oil and facilitating the cleaning and replacement of the filter screen.

[0017] In summary, for the large-torque adjustable worm and worm gear reducer of the present invention, through the design of the moving mechanism, reciprocating mechanism, lubricating mechanism and filtering mechanism, functions such as the adjustment of the reduction ratio, adaptive lubrication, and lubricating oil filtration are realized, improving the service performance and service life of the reducer, and having broad application prospects and market value. Description of the Drawings

[0018] Figure 1 is the overall structural schematic diagram of the present invention; Figure 2 is the overall sectional schematic diagram of the present invention; Figure 3 is the connection schematic diagram of the input shaft and the sleeve rod of the present invention; Figure 4 of the present invention Figure 3 is the enlarged structural schematic diagram at A in; Figure 5 is the sectional schematic diagram of the moving mechanism of the present invention; Figure 6 is the sectional schematic diagram of the reciprocating mechanism of the present invention; Figure 7 is the sectional schematic diagram of the filtering mechanism of the present invention; Figure 8 of the present invention Figure 7 is the enlarged structural schematic diagram at B in.

[0019] Among them, 1, base plate; 2, first chassis; 3, second chassis; 4, input shaft; 5, sleeve rod; 6, positioning bearing; 7, moving mechanism; 8, second gear; 9, first gear; 10, third gear; 11, fourth gear; 12, rotating rod; 13, worm; 14, worm gear; 15, output shaft; 16, first bevel gear set; 17, first transmission rod; 18, second transmission rod; 19, reciprocating mechanism; 20, lubricating mechanism; 21, guiding plate; 22, filtering mechanism; 41, positioning block; 71, fixed frame; 72, knob; 73, second bevel gear set; 74, threaded rod; 75, threaded block; 191, connecting frame; 192, rotating shaft; 193, turntable; 194, connecting rod; 195, sliding plate; 196, sliding rod; 201, extrusion cylinder; 202, oil storage tank; 203, one-way pipe; 204, guide rod; 205, piston; 206, oil outlet head; 221, filter box; 222, connection port; 223, empty slot; 224, spring; 225, abutting plate; 226, filter plate; 227, lock; 228, discharge port. Detailed Embodiment

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] Embodiment 1: As Figures 1-5 shown, the embodiment of the present invention provides a large-torque adjustable worm and worm gear reducer, which includes a bottom plate 1, a first chassis 2, a second chassis 3, and a moving mechanism 7. An input shaft 4 is disposed through the right side of the first chassis 2 and is connected to an external driving member. A sliding sleeve rod 5 is sleeved on the left side of the input shaft 4, and the sleeve rod 5 rotates with the rotation of the input shaft 4. Specifically, a positioning block 41 is fixedly connected to the outer wall of the left end of the input shaft 4, and a card slot adapted to the positioning block 41 is provided inside the sleeve rod 5. The sleeve rod 5 is moved by the moving mechanism 7. Specifically, the moving mechanism 7 includes a fixed frame 71 fixedly connected to the inner bottom wall of the first chassis 2. A knob 72 is disposed through the right side of the front surface of the fixed frame 71. The outer end of the knob 72 penetrates to the outside of the first chassis 2, and the inner end of the knob 72 is rotationally connected to a threaded rod 74 through a second bevel gear set 73. A threaded block 75 is threadedly connected to the outer wall of the threaded rod 74, and a positioning bearing seat 6 is fixedly connected to the upper end of the threaded block 75. The positioning bearing seat 6 is fixedly sleeved on the outer wall of the sleeve rod 5.

[0022] In the above structure, by rotating the knob 72 and under the rotational action of the second bevel gear set 73, the threaded rod 74 is driven to rotate, and then the threaded block 75 and the positioning bearing seat 6 are driven to move, so that the position of the sleeve rod 5 can be adjusted.

[0023] A first gear 9 and a second gear 8 are sleeved on the outer wall of the left side of the sleeve rod 5. A third gear 10 and a fourth gear 11 are correspondingly disposed above the first gear 9 and the second gear 8. The first gear 9 and the third gear 10 are a set of meshing gears, and the tooth number ratio of the first gear 9 to the third gear 10 is 2:1; the second gear 8 and the fourth gear 11 are a set of meshing gears, and the tooth number ratio of the second gear 8 to the fourth gear 11 is 1:2.

[0024] In the above structure, when the sleeve rod 5 moves to the left, the first gear 9 meshes with the third gear 10 to achieve transmission; when the sleeve rod 5 moves to the right, the second gear 8 meshes with the fourth gear 11 to achieve speed reduction to increase torque.

[0025] A rotating rod 12 is fixedly connected to the middle of the third gear 10 and the fourth gear 11. A worm 13 is fixedly connected to the right side of the rotating rod 12. A worm gear 14 is meshed with the upper side of the worm 13. An output shaft 15 is fixedly connected to the middle of the worm gear 14. The output shaft 15 penetrates to the outside of the first chassis 2 and is connected to an external output member.

[0026] It also includes a reciprocating mechanism 19 that follows the rotating rod 12 to work in conjunction and realize a reciprocating action, and a lubricating mechanism 20 that performs a lubricating action. The reciprocating mechanism 19 drives the lubricating mechanism 20 to discharge oil, and acts on the worm wheel 14 and the worm 13 to achieve lubrication and avoid wear.

[0027] It also includes a filtering mechanism 22 for filtering the lubricating oil to remove impurities and particulate matter for reuse.

[0028] Embodiment 2: Figures 1-8 As shown, an embodiment of the present invention provides a large torque adjustable worm gear reducer, including a base plate 1, a first chassis 2, a second chassis 3, and a moving mechanism 7. An input shaft 4 is provided through the right side of the first chassis 2, which is connected to an external driving member. A sliding sleeve rod 5 is sleeved on the left side of the input shaft 4, and the sleeve rod 5 rotates with the rotation of the input shaft 4. Specifically, a positioning block 41 is fixedly connected to the outer wall of the left end of the input shaft 4, and a slot adapted to the positioning block 41 is provided inside the sleeve rod 5. The sleeve rod 5 is moved by the moving mechanism 7. Specifically, the moving mechanism 7 includes a fixed frame 71 fixedly connected to the inner bottom wall of the first chassis 2. A knob 72 is penetrated on the right side of the front side of the fixed frame 71. The outer end of the knob 72 penetrates to the outside of the first chassis 2. The inner end of the knob 72 is rotatably connected to a threaded rod 74 through a second bevel gear set 73. The outer wall of the threaded rod 74 is threadedly connected to a threaded block 75. The upper end of the threaded block 75 is fixedly connected to a positioning bearing seat 6. The positioning bearing seat 6 is fixedly sleeved on the outer wall of the sleeve rod 5.

[0029] The above structure can realize the position adjustment of the sleeve rod 5 by rotating the knob 72 and driving the threaded rod 74 to rotate under the rotation action of the second bevel gear set 73, thereby driving the threaded block 75 and the positioning bearing seat 6 to move.

[0030] The left outer wall of the sleeve rod 5 is sleeved with a first gear 9 and a second gear 8, and the upper sides of the first gear 9 and the second gear 8 are correspondingly provided with a third gear 10 and a fourth gear 11. The first gear 9 and the third gear 10 are a set of meshing gears, and the gear ratio of the first gear 9 to the third gear 10 is 2:1; the second gear 8 and the fourth gear 11 are a set of meshing gears, and the gear ratio of the second gear 8 to the fourth gear 11 is 1:2.

[0031] In the above structure, when the sleeve rod 5 moves to the left, the first gear 9 meshes with the third gear 10 to achieve transmission; when the sleeve rod 5 moves to the right, the second gear 8 meshes with the fourth gear 11 to achieve deceleration to increase torque.

[0032] A rotating rod 12 is fixedly connected to the middle of the third gear 10 and the fourth gear 11, a worm 13 is fixedly connected to the right side of the rotating rod 12, a worm wheel 14 is meshed on the upper side of the worm 13, an output shaft 15 is fixedly connected to the middle of the worm wheel 14, the output shaft 15 passes through the outside of the first chassis 2, and is connected to an external output member.

[0033] It also includes a reciprocating mechanism 19 that follows the rotating rod 12 to work in linkage and realize a reciprocating action and a lubricating mechanism 20 that performs a lubricating action. The reciprocating mechanism 19 drives the lubricating mechanism 20 to discharge oil and acts on the worm wheel 14 and the worm 13. Specifically, the left outer wall of the rotating rod 12 is rotatably connected to the first transmission rod 17 through the first bevel gear set 16. The right side of the upper end of the first transmission rod 17 is connected to the second transmission rod 18 through a commutator (the function is similar to the first bevel gear set 16). The right end of the second transmission rod 18 is connected to the reciprocating mechanism 19; Secondly, the reciprocating mechanism 19 includes a connecting frame 191 fixedly connected to the inner wall of the second chassis 3, the interior of the connecting frame 191 is rotatably connected to a rotating shaft 192 rotatably connected to the second transmission rod 18, the front end of the rotating shaft 192 is fixedly connected to a rotating disk 193, the front of the rotating disk 193 is rotatably connected to a connecting rod 194 on the outside, the right end of the connecting rod 194 is rotatably connected to a slide plate 195, the right side of the slide plate 195 is fixedly connected to a sliding rod 196, and the right end of the sliding rod 196 slides through the interior of the extrusion cylinder 201; The above structure drives the rotating shaft 192 to rotate as the rotating rod 12 rotates and under the transmission action of the first transmission rod 17 and the second transmission rod 18, thereby realizing the rotation of the turntable 193, and under the connection action of the connecting rod 194, drives the slide plate 195 and the slide rod 196 to reciprocate to realize the reciprocating action.

[0034] Furthermore, the lubrication mechanism 20 includes an extrusion cylinder 201 and an oil storage tank 202. Lubricating oil is stored in the oil storage tank 202. The oil storage tank 202 is connected to the extrusion cylinder 201 through a one-way tube 203 at its bottom. The right end of the slide rod 196 is fixedly connected to a guide rod 204. The right end of the guide rod 204 is fixedly connected to a piston 205. A one-way flow oil outlet head 206 is provided at the bottom of the extrusion cylinder 201.

[0035] The above structure, along with the reciprocating movement of the slide rod 196, drives the guide rod 204 and the piston 205 to reciprocate, so that the lubricating oil in the oil storage tank 202 can be introduced into the extrusion cylinder 201 and discharged from the oil outlet head 206, so that the lubricating oil can be adaptively applied to the worm wheel 14 and the worm 13 to achieve a good lubrication effect.

[0036] It also includes a filtering mechanism 22 for filtering the lubricating oil. Specifically, the filtering mechanism 22 includes a filtering box 221 fixedly connected to the right outer surface of the first chassis 2. The filtering box 221 introduces the lubricating oil through the guide plate 21 obliquely arranged inside the first chassis 2. A connecting port 222 communicating with the first chassis 2 is arranged on the left side of the filtering box 221. A hollow groove 223 is opened on the left inner wall of the filtering box 221. Two springs 224 are fixedly connected to the inner wall of the hollow groove 223. The other ends of the two springs 224 are fixedly connected to a contact plate 225. The right side of the contact plate 225 contacts a filter plate 226. A lock buckle 227 for locking the filter plate 226 is arranged on the right side of the filtering box 221. A discharge port 228 is penetrated through the bottom of the right side of the filtering box 221.

[0037] With the above structure, after the lubricating oil is used up, it can be filtered through the filter plate 226 in the filter box 221 to remove impurities and particulate matter therein, thereby ensuring the purity of the lubricating oil; the filter plate 226 is inserted into the filter box 221 from the right side so that it squeezes the resistance plate 225 and the spring 224, and is positioned by rotating the lock 227. When it is necessary to remove the filter plate 226, just rotate the lock 227 in the opposite direction again. Under the action of the spring 224, the filter plate 226 can be popped out from the right side, which is convenient for removal and replacement.

[0038] Working principle: When using the large torque adjustable worm gear reducer, first connect the input shaft 4 and the output shaft 15 with external parts, then turn the knob 72 to drive the sleeve rod 5 to move left, so that the first gear 9 and the third gear 10 are meshed to achieve transmission; when the torque needs to be increased, turn the knob 72 in the opposite direction to drive the sleeve rod 5 to move right, so that the second gear 8 and the fourth gear 11 are meshed to achieve deceleration to increase the torque; As the rotating rod 12 rotates, and under the transmission action of the first transmission rod 17 and the second transmission rod 18, the rotating shaft 192 is driven to rotate, thereby realizing the rotation of the turntable 193, and under the connection action of the connecting rod 194, the slide plate 195 and the slide rod 196 are driven to reciprocate, thereby driving the guide rod 204 and the piston 205 to reciprocate, so that the lubricating oil in the oil storage tank 202 can be introduced into the extrusion cylinder 201 and discharged from the oil outlet head 206, so that the lubricating oil can be adaptively applied to the worm wheel 14 and the worm 13, achieving a good lubrication effect; The lubricating oil enters the filter box 221 and is filtered through the filter plate 226 to remove impurities and particles therein, thereby ensuring the purity of the lubricating oil; Installation and removal of the filter plate 226: Insert the filter plate 226 into the filter box 221 from the right side, so that it presses against the contact plate 225 and the spring 224, and position it by rotating the lock 227; when the filter plate 226 needs to be removed, just rotate the lock 227 in the reverse direction again, and under the action of the spring 224, the filter plate 226 can pop out from the right side, which is convenient for removal and replacement.

[0039] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. High torque adjustable worm gear reducer, characterized by: The invention comprises a bottom plate (1), a first chassis (2), a second chassis (3), and a moving mechanism (7); an input shaft (4) is provided through the right side of the first chassis (2); a sliding sleeve rod (5) is sleeved on the left side of the input shaft (4); the sleeve rod (5) rotates following the rotation of the input shaft (4); the sleeve rod (5) is moved by the moving mechanism (7); a first gear (9) and a second gear (8) are sleeved on the left side outer wall of the sleeve rod (5); a third gear (10) and a fourth gear (11) are provided on the upper side of the first gear (9) and the second gear (8); a rotating rod (12) is fixedly connected to the middle part of the third gear (10) and the fourth gear (11); a worm (13) is fixedly connected to the right side of the rotating rod (12); a worm wheel (14) is meshed on the upper side of the worm wheel (13); an output shaft (15) is fixedly connected to the middle part of the worm wheel (14); the output shaft (15) passes through the outside of the first chassis (2); It also includes a reciprocating mechanism (19) that follows the rotating rod (12) to work in conjunction and realize a reciprocating action, and a lubricating mechanism (20) that performs a lubricating action, wherein the reciprocating mechanism (19) drives the lubricating mechanism (20) to discharge oil and acts on the worm wheel (14) and the worm (13); It also includes a filtering mechanism (22) for filtering the lubricating oil.

2. The large torque adjustable worm gear reducer according to claim 1, characterized in that: A positioning block (41) is fixedly connected to the outer wall of the left end of the input shaft (4), and a slot adapted to the positioning block (41) is provided inside the sleeve rod (5).

3. The large torque adjustable worm gear reducer according to claim 2 is characterized in that: The moving mechanism (7) comprises a fixed frame (71) fixedly connected to the inner bottom wall of the first chassis (2); a knob (72) is provided on the right side of the front face of the fixed frame (71); the outer end of the knob (72) extends to the outside of the first chassis (2); the inner end of the knob (72) is rotatably connected to a threaded rod (74) via a second bevel gear set (73); the outer wall of the threaded rod (74) is threadedly connected to a threaded block (75); the upper end of the threaded block (75) is fixedly connected to a positioning bearing seat (6); and the positioning bearing seat (6) is fixedly sleeved on the outer wall of the sleeve rod (5).

4. The large torque adjustable worm gear reducer according to claim 1, characterized in that: The first gear (9) and the third gear (10) are a set of meshing gears, and the gear ratio of the first gear (9) to the third gear (10) is 2-3:1; The second gear (8) and the fourth gear (11) are a set of meshing gears, and the gear ratio of the second gear (8) to the fourth gear (11) is 1:2-3.

5. The large torque adjustable worm gear reducer according to claim 1, characterized in that: The left outer wall of the rotating rod (12) is rotatably connected to a first transmission rod (17) via a first bevel gear set (16); the right side of the upper end of the first transmission rod (17) is connected to a second transmission rod (18) via a commutator; the right end of the second transmission rod (18) is connected to a reciprocating mechanism (19).

6. The large torque adjustable worm gear reducer according to claim 1 or 5, characterized in that: The reciprocating mechanism (19) comprises a connecting frame (191) fixedly connected to the upper inner wall of the second chassis (3); the connecting frame (191) is internally rotatably connected to a rotating shaft (192) rotatably connected to the second transmission rod (18); the front end of the rotating shaft (192) is fixedly connected to a turntable (193); the front side of the turntable (193) is rotatably connected to a connecting rod (194) on the outer side; the right end of the connecting rod (194) is rotatably connected to a slide plate (195); the right side of the slide plate (195) is fixedly connected to a sliding rod (196); the right end of the sliding rod (196) slides through the interior of the extrusion cylinder (201).

7. The large torque adjustable worm gear reducer according to claim 6, characterized in that: The lubricating mechanism (20) comprises an extrusion cylinder (201) and an oil storage tank (202). Lubricating oil is stored in the oil storage tank (202). The oil storage tank (202) is connected to the extrusion cylinder (201) via a one-way tube (203) at its bottom. The right end of the sliding rod (196) is fixedly connected to a guide rod (204). The right end of the guide rod (204) is fixedly connected to a piston (205). The bottom of the extrusion cylinder (201) is provided with a one-way oil outlet head (206).

8. The large torque adjustable worm gear reducer according to claim 1, characterized in that: The filtering mechanism (22) comprises a filtering box (221) fixedly connected to the right outer surface of the first chassis (2); the filtering box (221) introduces lubricating oil through a guide plate (21) obliquely arranged inside the first chassis (2); a connecting port (222) communicating with the first chassis (2) is arranged on the left side of the filtering box (221); a hollow groove (223) is provided on the left inner wall of the filtering box (221); two springs (224) are fixedly connected to the inner wall of the hollow groove (223); the other ends of the two springs (224) are fixedly connected to a contact plate (225); the right side of the contact plate (225) contacts the filtering plate (226); a lock buckle (227) for locking the filtering plate (226) is arranged on the right side of the filtering box (221); and a discharge port (228) is provided through the bottom of the right side of the filtering box (221).

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