Noise reduction structure of worm and gear speed reducer

Abstract

The utility model discloses a noise reduction structure of a worm and gear reducer, and relates to the technical field of worm and gear reducers. The noise reduction structure of the worm and gear speed reducer comprises a speed reduction box body, a box body upper cover is arranged at the top end of the speed reduction box body, an output worm gear assembly is arranged in the box body upper cover and the speed reduction box body, an input speed reduction assembly is arranged at the bottom of the inner side of the speed reduction box body, and an oil liquid circulation system is arranged at the front end of the speed reduction box body. A temperature detection needle is arranged on the lower side of the front end of the reduction gearbox body, lubricating oil is accurately conveyed to the oil inlet hole through the oil conveying pipe, the lubricating oil can evenly cover the contact face of the worm gear body and the transmission worm through the gravity effect, the friction coefficient between the worm gear body and the transmission worm is greatly reduced through intervention of the lubricating oil, noise generated by friction is reduced, and the service life of the transmission worm is prolonged. And the lubricating oil can be guided to flow to the driven gear through the horizontal flow guide groove, so that the driven gear is well lubricated, and the noise generated by friction is further reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to worm gear reduction box technical field, concretely is a worm gear reducer noise reduction structure. BACKGROUND

[0002] As a common transmission device, worm gear reducer is widely used in various industrial equipment and mechanical transmission system, which is composed of worm gear, shaft coupling, shell, lubricating system, input shaft and output shaft, can realize larger reduction ratio, can satisfy the occasion that speed and torque have strict requirement, compared with other types of reducer, under the same transmission ratio, double stage worm gear reduction box volume is smaller, occupies less space, can be installed in the equipment of limited space.

[0003] The prior art has the following problems:

[0004] In actual operation process, the noise problem is always the focus of the industry, the friction between the worm gear and the worm is inevitable when the traditional worm gear reducer works, this friction not only will lead to energy loss, also can produce bigger noise, causes the disturbance to the working environment, especially in some strict noise places, such as precision instrument manufacturing workshop, medical equipment operating environment etc., noise problem seriously influences the normal use of equipment.

[0005] In addition, the lubricating device in the reducer plays a key role in normal operation, the oil temperature will rise in the recycling process of lubricating oil due to the heat generated by the friction between the worm gear and the gear, if the oil temperature is too high, the viscosity of the lubricating oil will be reduced, thereby affecting its lubricating performance, further aggravating the wear of parts, shortening the service life of the reducer. UTILITY MODEL CONTENTS

[0006] In view of the deficiencies of the prior art, the utility model provides a worm gear reducer noise reduction structure, solves the problems of excessive noise and poor lubrication effect.

[0007] To achieve the above object, the utility model discloses the following technical scheme: a worm gear reducer noise reduction structure includes a reduction box body, the reduction box body top is provided with box body upper cover, the box body upper cover and the reduction box body inside are provided with output worm gear assembly in common, the output worm gear assembly rear end extends to the outside of the rear end of the reduction box body, the reduction box body inboard bottom is provided with input reduction assembly, the input reduction assembly left end extends to the outside of the left end of the reduction box body, the reduction box body front end is provided with oil circulation system, the reduction box body front end lower side is provided with temperature detection needle.

[0008] Preferably, the reduction gearbox comprises a gearbox body, the top end of the gearbox body is fixedly connected to the bottom end of the gearbox cover, the inner side of the gearbox body is fixedly connected to a limiting oil guide block, the limiting oil guide block is located below the output worm gear assembly, a horizontal flow guide groove is formed in the inner bottom of the gearbox body, and the horizontal flow guide groove is located below the input reduction assembly.

[0009] Preferably, the input reduction assembly comprises an input shaft, the right end of the input shaft extends into the inner part of the gearbox body and is rotationally connected to the inner part of the gearbox body, the outer surface of the input shaft is fixedly connected to a driving gear on the right side, the lower side of the driving gear is meshingly connected to a driven gear, the right end of the driven gear is fixedly connected to a connecting rotating shaft, the right end of the connecting rotating shaft is fixedly connected to a transmission worm, the right end of the transmission worm is rotationally connected to a support shaft relay, the right end of the support shaft relay is fixedly connected to the right end of the inner side of the gearbox body, the horizontal flow guide groove is in communication with the space below the transmission worm and the driven gear, and the number of teeth of the driven gear is greater than that of the driving gear.

[0010] Preferably, the output worm gear assembly comprises an output shaft, the rear end of the output shaft extends to the outside of the rear end of the reduction gearbox, the outer surface of the output shaft is fixedly connected to a reduction worm, and the lower side of the reduction worm is engaged above the transmission worm.

[0011] Preferably, the output shaft comprises a transmission shaft, the outer surface of the transmission shaft is fixedly connected to the inner side of the reduction worm, the rear side of the outer surface of the transmission shaft is fixedly connected to a limiting ring, the rear end of the transmission shaft extends to the outside of the rear end of the gearbox body, the rear end of the transmission shaft is fixedly connected to an output connecting shaft, the outer surface of the transmission shaft is rotationally connected to the inner part of the gearbox body, an oil inlet hole is formed in the front end of the transmission shaft, and a plurality of oil delivery holes are formed in the inner rear side of the oil inlet hole.

[0012] Preferably, the oil circulation system comprises an oil pump, the rear end of the oil pump is fixedly connected to the front end of the gearbox body, the output end of the oil pump is fixedly connected to an oil delivery pipe, the rear end of the oil delivery pipe extends to the inner rear side of the oil inlet hole, the outer surface of the oil delivery pipe is rotationally connected to the inner side of the oil inlet hole, the rear end of the oil delivery pipe can cover the transmission shaft, a oil discharge port is formed in the lower rear end of the oil delivery pipe, a plurality of cooling fins are arranged on the outer surface of the oil pump, the input end of the oil pump is fixedly connected to an oil suction pipe, and the rear end of the oil suction pipe extends to the inner side of the gearbox body below the transmission worm.

[0013] Preferably, the reduction worm comprises a worm body, the lower side of the worm body is meshingly connected to the upper side of the outer surface of the transmission worm, the middle part of the worm body is fixedly connected to the outer surface of the transmission shaft, an oil passage hole is formed between every two adjacent teeth of the worm body, and one end of the plurality of oil passage holes close to the transmission shaft is in communication with the nearest oil delivery hole.

[0014] Preferably, the temperature detection needle comprises a detection needle body, the detection needle body is obliquely inserted into the inside of the box body, a lower end of the detection needle body is located below the transmission worm, an upper end of the detection needle body is fixedly connected with an alarm lamp, and the bottom end of the alarm lamp is in contact with the outer surface of the box body.

[0015] The utility model provides output worm wheel assembly and oil circulating system, have the following beneficial effects compared with prior art:

[0016] 1. The worm and gear reducer noise reduction structure accurately delivers lubricating oil to the oil inlet hole through the oil delivery pipe, and the lubricating oil can smoothly pass through the oil delivery hole and the oil passage and uniformly cover the contact surface of the worm body and the transmission worm through the gravity effect, so that the friction coefficient between the worm and the gear is greatly reduced, and the noise caused by friction is reduced from the source.

[0017] 2. The worm and gear reducer noise reduction structure can effectively collect the lubricating oil through the horizontal flow guide groove and guide the lubricating oil to the driven gear, so that the driven gear can fully contact the lubricating oil during transmission, thereby achieving good lubrication of the driven gear and further reducing the noise caused by friction between the driven gear and the driving gear. During the circulation of the lubricating oil, the lubricating oil will pass through the cooling fins, so that the heat in the lubricating oil caused by friction can be quickly dissipated, thereby effectively reducing the temperature of the lubricating oil, maintaining the lubricating performance of the lubricating oil, reducing the wear of the parts and prolonging the service life of the reducer. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The utility model structural schematic diagram.

[0019] Figure 2 The utility model internal structure section view.

[0020] Figure 3 The utility model output shaft structure schematic diagram.

[0021] Figure 4 The utility model speed reduction worm structure schematic diagram.

[0022] Figure 5 The utility model detection structure schematic diagram.

[0023] In the figure: 1, the box upper cover; 2, output worm gear assembly; 21, speed reduction worm gear; 211, worm gear body; 212, oil hole; 22, output shaft; 221, output connecting shaft; 222, limit ring; 223, transmission shaft; 224, oil delivery hole; 225, oil inlet hole; 3, speed reduction box body; 31, box body; 32, limit oil guide block; 33, horizontal flow guide groove; 4, input speed reduction assembly; 41, input shaft; 42, driving gear; 43, driven gear; 44, connecting rotating shaft; 45, transmission worm; 46, support shaft relay; 5, oil circulation system; 51, oil delivery pipe; 52, oil pump; 53, cooling fin; 54, oil suction pipe; 6, temperature detection needle; 61, detection needle body; 62, alarm lamp. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0025] Please refer to Figures 1-5 The utility model provides a kind of technical scheme: a worm gear reducer noise reduction structure, including speed reduction box body 3, speed reduction box body 3 top end is provided with box upper cover 1, box upper cover 1 is with the inside speed reduction box body 3 jointly provided with output worm gear assembly 2, output worm gear assembly 2 rear end extends to the outside of speed reduction box body 3 rear end, input speed reduction assembly 4 is set in the inside bottom of speed reduction box body 3, input speed reduction assembly 4 left end extends to the outside of speed reduction box body 3 left end, oil circulation system 5 is set in the front end of speed reduction box body 3, temperature detection needle 6 is set in the front end lower side of speed reduction box body 3.

[0026] In the working process of the worm gear reducer noise reduction structure, power is input from the left end of input speed reduction assembly 4, the speed is reduced by cooperating with output worm gear assembly 2, and the power is output from the rear end, at this time, oil circulation system 5 starts to work, lubricating oil is evenly covered on the worm gear contact surface through output worm gear assembly 2, friction and noise are reduced, and temperature detection needle 6 monitors the lubricating oil temperature in the box in real time.

[0027] Please refer to Figure 2 Speed reduction box body 3 includes box body 31, and the top end of box body 31 is fixedly connected to the bottom end of box upper cover 1, the inside of box body 31 is fixedly connected to limit oil guide block 32, limit oil guide block 32 is below output worm gear assembly 2, horizontal flow guide groove 33 is set in the inside lower side of box body 31, and horizontal flow guide groove 33 is below input speed reduction assembly 4.

[0028] When the worm gear speed reducer works, the box body 31 is tightly connected with the box upper cover 1, and a stable closed space is provided for the internal components. When the oil circulating system 5 operates, the lubricating oil is transported to the output worm gear assembly 2, and then the lubricating oil drops downward under the action of gravity. The limiting oil guide block 32 guides the lubricating oil to gather above the input speed reduction assembly 4, so that the lubricating oil is prevented from splashing randomly. When the input speed reduction assembly 4 works, the gear and the worm are also lubricated by the lubricating oil. The used lubricating oil flows downward, and the horizontal flow guide groove 33 located below the input speed reduction assembly 4 can collect the lubricating oil, so that the lubricating oil flows orderly in the box.

[0029] Please refer to Figure 2 The input speed reduction assembly 4 comprises an input shaft 41, the right end of the input shaft 41 extends into the box body 31 and is rotationally connected to the inside of the box body 31, the outer surface of the input shaft 41 is fixedly connected with a driving gear 42 on the right side, the lower side of the driving gear 42 is meshingly connected with a driven gear 43, the right end of the driven gear 43 is fixedly connected with a connecting rotating shaft 44, the right end of the connecting rotating shaft 44 is fixedly connected with a transmission worm 45, the right end of the transmission worm 45 is rotationally connected with a support shaft 46, the right end of the support shaft 46 is fixedly connected to the right end of the inside of the box body 31, and the horizontal flow guide groove 33 communicates the space below the transmission worm 45 and the driven gear 43. The number of teeth of the driven gear 43 is greater than that of the driving gear 42.

[0030] The external power is transmitted to the input shaft 41, which drives it to rotate in the box body 31. The driving gear 42 rotates accordingly. The number of teeth of the driven gear 43 is greater than that of the driving gear 42. Under the action of the gear transmission ratio, the high-speed rotation of the driving gear 42 is converted into the relatively slow rotation of the driven gear 43, achieving preliminary speed reduction. The driven gear 43 drives the connecting rotating shaft 44 to rotate, which in turn drives the transmission worm 45 connected thereto to rotate. In the process of rotating the transmission worm 45, the support shaft 46 provides stable support for the transmission worm 45, ensuring the smooth operation of the transmission worm 45. At the same time, the horizontal flow guide groove 33 communicates the space below the transmission worm 45 and the driven gear 43, which can effectively collect and guide the dripping lubricating oil, so that the plane where the lubricating oil gathers can be contacted by the driven gear 43, ensuring good lubrication of each component and maintaining the efficient operation of the input speed reduction assembly 4.

[0031] Please refer to Figure 2 The output worm gear assembly 2 comprises an output shaft 22, the rear end of the output shaft 22 extends to the outside of the rear end of the speed reducer box 3, and the outer surface of the output shaft 22 is fixedly connected with a speed reduction worm 21. The lower side of the speed reduction worm 21 is engaged above the transmission worm 45.

[0032] When the transmission worm 45 starts to rotate, the rotation of the transmission worm 45 will drive the reduction worm gear 21 to rotate around its own axis, and the rotation of the reduction worm gear 21 will synchronously drive the output shaft 22 to rotate, and with the rotation of the output shaft 22, it will transmit power from the reduction box body 3 to the external equipment, realizing the power output function of the entire worm gear reducer, to drive the external equipment to operate.

[0033] Please refer to Figure 3 The output shaft 22 comprises a transmission shaft 223, the outer surface of the transmission shaft 223 is fixedly connected to the inner side of the reduction worm gear 21, the outer surface of the transmission shaft 223 is fixedly connected to the limiting ring 222 at the rear side, the rear end of the transmission shaft 223 extends to the outer side of the rear end of the box body 31, the rear end of the transmission shaft 223 is fixedly connected with the output connecting shaft 221, the outer surface of the transmission shaft 223 is rotatably connected to the inside of the box body 31, the front end of the transmission shaft 223 is provided with an oil inlet hole 225, and a plurality of oil outlet holes 224 are formed in the rear side of the inner side of the oil inlet hole 225.

[0034] When the worm gear reducer operates, the transmission shaft 223 will rotate with the rotation of the reduction worm gear 21, the limiting ring 222 can prevent the transmission shaft 223 from axially moving during rotation, and the output connecting shaft 221 can transmit power to the external equipment. At the same time of the rotation of the transmission shaft 223, the oil circulation system works, the oil pump 52 delivers lubricating oil to the oil inlet hole 225 through the oil delivery pipe 51, the lubricating oil enters through the oil inlet hole 225 and then flows out from the rear side of the inner side of the plurality of oil outlet holes 224, lubricates the meshing part of the reduction worm gear 21 and the transmission worm 45, reduces friction, and ensures the stable operation of the equipment.

[0035] Please refer to Figure 3 The oil circulation system 5 comprises an oil pump 52, the rear end of the oil pump 52 is fixedly connected to the front end of the box body 31, the output end of the oil pump 52 is fixedly connected with the oil delivery pipe 51, the rear end of the oil delivery pipe 51 extends to the rear side of the inner side of the oil inlet hole 225, the outer surface of the oil delivery pipe 51 is rotatably connected to the inner side of the oil inlet hole 225, the rear end of the oil delivery pipe 51 can cover the transmission shaft 223, the rear end of the oil delivery pipe 51 is provided with a drain hole below, and the outer surface of the oil pump 52 is provided with a plurality of cooling fins 53.

[0036] When the oil circulation system 5 starts to work, the oil pump 52 starts to work, and the lubricating oil is sucked from the bottom of the box body 31 through the oil suction pipe 54. After the lubricating oil is sucked into the oil pump 52, it is pressurized by the oil pump 52 and delivered out through the oil delivery pipe 51. The outer surface of the oil delivery pipe 51 is rotatably connected to the inner side of the oil inlet hole 225, which ensures that the oil delivery pipe 51 can still stably deliver oil when the transmission shaft 223 rotates. The rear end of the oil delivery pipe 51 can cover the transmission shaft 223, and the lubricating oil flows out from the oil outlet at the rear end of the oil delivery pipe 51, ensuring that the lubricating oil enters from below through the oil delivery hole 224 and then lubricates the related parts through the oil delivery hole 224. In this process, the cooling fins 53 on the outer surface of the oil pump 52 will dissipate the heat generated by the operation of the oil pump 52 and part of the heat carried by the lubricating oil, maintaining the good performance of the lubricating oil and ensuring the stable operation of the entire oil circulation system, ensuring that each part of the speed reducer is fully lubricated and cooled.

[0037] Please refer to Figure 4 The speed reducer worm 21 comprises a worm body 211, the lower side of the worm body 211 is meshingly connected to the upper side of the outer surface of the transmission worm 45, the middle part of the worm body 211 is fixedly connected to the outer surface of the transmission shaft 223, and the oil passage 212 is arranged between every two adjacent teeth of the worm body 211. The end of the oil passage 212 close to the transmission shaft 223 is in communication with the nearest oil delivery hole 224.

[0038] When the transmission worm 45 rotates, the worm body 211 rotates with it, and the rotation of the worm body 211 drives the transmission shaft 223 to rotate synchronously, realizing power output. In this process, the lubricating oil flowing out of the oil delivery hole 224 flows to the meshing part of the worm body 211 and the transmission worm 45 through the oil passage 212 in communication with the oil delivery hole 224. With the rotation of the worm body 211, the oil passage 212 continuously delivers lubricating oil to the meshing part, ensuring that the worm body 211 and the transmission worm 45 are always lubricated by lubricating oil when they mesh with each other, reducing friction and wear, and also reducing the noise generated during operation, ensuring the stable operation of the speed reducer.

[0039] Please refer to Figure 5 The temperature detection needle 6 comprises a detection needle body 61, which is obliquely inserted into the inner side of the box body 31. The lower end of the detection needle body 61 is located below the transmission worm 45, and the upper end of the detection needle body 61 is fixedly connected with the alarm lamp 62. The bottom end of the alarm lamp 62 is in contact with the outer surface of the box body 31.

[0040] The detection needle body 61 can sense the temperature change of the lubricating oil in real time. Once the temperature of the lubricating oil exceeds the set normal range, the detection needle body 61 will transmit a signal to the alarm lamp 62 connected thereto. After receiving the signal, the alarm lamp 62 will light up, sending a warning to the operator in a direct and eye-catching way, reminding him to pay attention to the problem of high temperature of the lubricating oil in the speed reducer, so as to take timely measures.

[0041] Please refer to Figures 1-5 In operation.

[0042] First external power access input shaft 41 left end of input assembly 4, drive input shaft 41 rotation, drive gear 42 rotation, drive gear 42 and driven gear 43 meshing, since the driven gear 43 tooth number greater than the drive gear 42, to achieve preliminary speed reduction, in turn drive connecting shaft 44 and transmission worm 45 rotation, rotating transmission worm 45 drive with it meshing speed reducer worm 21 rotation, speed reducer worm 21 fixed on the output shaft 22, the output shaft 22 rotation, through the output connecting shaft 221 power transmission to external equipment, oil pump 52 through the oil suction pipe 54 to absorb transmission worm 45 below the lubricating oil, through the oil pipe 51 to the output shaft 22 oil hole 225, lubricating oil through the oil hole 224 and oil hole 212 lubrication worm gear meshing, while the fin 53 to dissipate the heat of the lubricating oil, maintain its performance, temperature detection needle 6 real-time monitoring of oil temperature, if the oil temperature is too high, alarm lamp 62 light up to remind the operator.

[0043] Meanwhile, the contents not described in detail in the specification all belong to the prior art known to those skilled in the art.

[0044] It should be noted that in this paper, such as the first and second relationship terms are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the term "includes", "contains" or any other variant thereof is 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. Without more limitations. By the sentence "includes a limited element, does not exclude the existence of another identical element in the process, method, article or equipment including the element".

[0045] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A worm gear reducer noise reduction structure, comprising a reduction box (3), characterized in that: The top end of the reduction gearbox (3) is provided with a gearbox upper cover (1), the gearbox upper cover (1) and the inside of the reduction gearbox (3) are provided with an output worm gear assembly (2) together, the rear end of the output worm gear assembly (2) extends to the outside of the rear end of the reduction gearbox (3), the inside bottom of the reduction gearbox (3) is provided with an input reduction assembly (4), the left end of the input reduction assembly (4) extends to the outside of the left end of the reduction gearbox (3), the front end of the reduction gearbox (3) is provided with an oil circulation system (5), and the front end of the reduction gearbox (3) is provided with a temperature detection needle (6).

2. The noise reduction structure of a worm gear speed reducer according to claim 1, characterized in that: The reduction gearbox (3) comprises a box main body (31), the top end of the box main body (31) is fixedly connected to the bottom end of the gearbox upper cover (1), the inside of the box main body (31) is fixedly connected to a limiting oil guide block (32), the limiting oil guide block (32) is located below the output worm gear assembly (2), and horizontal flow guide grooves (33) are formed in the inside bottom of the box main body (31). The horizontal flow guide grooves (33) are located below the input reduction assembly (4).

3. The noise reduction structure of a worm gear speed reducer according to claim 2, characterized in that: The input reduction assembly (4) comprises an input shaft (41), the right end of the input shaft (41) extends to the inside of the box main body (31) and is rotatably connected to the inside of the box main body (31), the outer surface of the input shaft (41) is fixedly connected with a driving gear (42) on the right side, the lower side of the driving gear (42) is meshedly connected with a driven gear (43), the right end of the driven gear (43) is fixedly connected with a connecting rotating shaft (44), the right end of the connecting rotating shaft (44) is fixedly connected with a transmission worm (45), the right end of the transmission worm (45) is rotatably connected with a support shaft relay (46), the right end of the support shaft relay (46) is fixedly connected to the inside right end of the box main body (31), the horizontal flow guide grooves (33) are communicated with the space below the transmission worm (45) and the driven gear (43), and the number of teeth of the driven gear (43) is greater than that of the driving gear (42).

4. The noise reduction structure of a worm gear speed reducer according to claim 3, characterized in that: The output worm gear assembly (2) comprises an output shaft (22), the rear end of the output shaft (22) extends to the outside of the rear end of the reduction gearbox (3), the outer surface of the output shaft (22) is fixedly connected with a reduction worm (21), and the lower side of the reduction worm (21) is engaged above the transmission worm (45).

5. The noise reduction structure of a worm gear speed reducer according to claim 4, characterized in that: The output shaft (22) comprises a transmission shaft (223), the outer surface of the transmission shaft (223) is fixedly connected to the inside of the reduction worm (21), the outer surface of the transmission shaft (223) is fixedly connected with a limiting ring (222) on the back side, the rear end of the transmission shaft (223) extends to the outside of the rear end of the box main body (31), the rear end of the transmission shaft (223) is fixedly connected with an output connecting shaft (221), the outer surface of the transmission shaft (223) is rotatably connected to the inside of the box main body (31), an oil inlet hole (225) is formed in the front end of the transmission shaft (223), and a plurality of oil conveying holes (224) are formed in the inside rear of the oil inlet hole (225).

6. The noise reduction structure of a worm gear speed reducer according to claim 5, characterized in that: The oil circulation system (5) comprises an oil pump (52), the rear end of the oil pump (52) is fixedly connected to the front end of the box body (31), the output end of the oil pump (52) is fixedly connected with an oil delivery pipe (51), the rear end of the oil delivery pipe (51) extends to the rear of the inside of the oil inlet hole (225), the outer surface of the oil delivery pipe (51) is rotatably connected to the inside of the oil inlet hole (225), the rear end of the oil delivery pipe (51) can cover the transmission shaft (223), an oil drain hole is formed below the rear end of the oil delivery pipe (51), a plurality of cooling fins (53) are arranged on the outer surface of the oil pump (52), the input end of the oil pump (52) is fixedly connected with an oil suction pipe (54), the rear end of the oil suction pipe (54) extends to the inside of the box body (31) below the transmission worm (45).

7. The noise reduction structure of a worm gear speed reducer according to claim 5, characterized in that: The speed reduction worm (21) comprises a worm body (211), the lower side of the worm body (211) is engagedly connected to the upper side of the outer surface of the transmission worm (45), the middle part of the worm body (211) is fixedly connected to the outer surface of the transmission shaft (223), the worm body (211) is provided with an oil passage (212) between every two adjacent teeth, and the end of the oil passage (212) close to the transmission shaft (223) is communicated with the nearest oil delivery hole (224).

8. The noise reduction structure of a worm gear speed reducer according to claim 6, characterized in that: The temperature detection needle (6) comprises a detection needle body (61), the detection needle body (61) is obliquely inserted into the inside of the box body (31), the downward end of the detection needle body (61) is located below the transmission worm (45), the upper end of the detection needle body (61) is fixedly connected with an alarm lamp (62), and the bottom end of the alarm lamp (62) is in contact with the outer surface of the box body (31).

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