Spider hand microbead negative pressure lubricating system

Abstract

The invention relates to the technical field of mechanical lubrication, and particularly discloses a spider hand microbead negative pressure lubrication system which comprises a spider hand, a microbead oil unit and a waste oil vacuum recovery unit, a transmission cavity and an oil return cavity which are communicated with each other are formed in the spider hand, and the microbead oil unit is communicated with the transmission cavity; the waste oil vacuum recovery unit is communicated with the oil return cavity; the microbead oil unit comprises an oil storage tank, a microbead oil generator, a microbead oil conveying pipe and a nozzle, the microbead oil generator is connected with the oil storage tank, a compressed air inlet pipe is arranged at one end of the microbead oil generator, the other end of the microbead oil generator is connected with the microbead oil conveying pipe, and the microbead oil conveying pipe extends to the end of the transmission cavity and is connected with the nozzle; according to the spider hand microbead negative pressure lubricating system, a traditional lubricating mode is changed, the operation efficiency of a spider hand is improved, the service life of the spider hand is prolonged, it is effectively guaranteed that lubricating oil cannot be leaked to the outside when the spider arm is sealed in any state, and product quality accidents are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical lubrication, and in particular discloses a spider-hand micro-ball negative pressure lubrication system. Background Art

[0002] The spider arm is an important transmission component in a special industry, mainly composed of a spider body, a sun gear, multiple sets of planetary gears, planetary epitaxial shafts, epitaxial shaft seals and spider arms. During operation, the spider body rotates by itself, and the planetary gear system inside drives the independent shaft system connected to the planetary gear to operate, thereby driving the external spider arm to rotate. This transmission component has structural characteristics such as complex internal structure, multiple shaft systems, multiple gear meshing, and complex and hidden bearing positions, which leads to unfavorable lubrication.

[0003] Although the traditional oil-immersed lubrication (i.e., filling the spider body with lubricating oil so that all parts that need lubrication can contact the lubricating oil for lubrication) can lubricate all parts in the transmission system, there are also some problems. First, when the lubricating oil runs together in the spider body, a large amount of heat will be generated, and this heat cannot be quickly dissipated, resulting in the spider body not being able to run too fast; second, due to the asymmetric cavity structure inside the spider body, it is easy to have bearing dynamic balance problems, which in turn limits the running speed of the spider body; third, the moving parts in the spider body are completely immersed in the lubricating oil, which results in the low quality of the oil film formed by the moving pair, which is not conducive to lubrication; fourth, the rotation of the spider body will drive the movement of the lubricating oil, thereby generating on-site noise, and an external circulating oil pump is required for forced lubrication; fifth, during the operation of the spider arm, the seal is often damaged due to wear, temperature, internal pressure, aging of the seal, etc., causing the internal lubricating oil to leak under the action of operation or internal pressure, and the leaked lubricating oil will splash around due to centrifugal force, seriously affecting product quality and polluting the on-site working environment.

[0004] At present, there are related technologies that disclose the use of oil mist lubrication to lubricate the parts inside the transmission machinery. However, on the one hand, the particles of the atomized lubricating oil are extremely small, usually only 1~3um, and it is difficult to quickly settle and form a film on the surface of the transmission parts, resulting in poor lubrication effect. On the other hand, oil mist lubrication requires positive pressure airflow to pass the atomized lubricating oil into the interior of the machine, resulting in the interior of the machine being in a positive pressure state. Once the seal is damaged, the atomized lubricating oil will leak out and pollute the product quality and working environment. In addition, even if the atomized lubricating oil is passed into the interior of the machine by negative pressure suction, the atomized lubricating oil particles are small and are easily drawn out of the transmission cavity after negative pressure suction, resulting in the atomized lubricating oil being difficult to fully contact with the transmission parts, resulting in poor lubrication effect. Therefore, in view of the shortcomings of the existing spider hand internal transmission system using oil immersion lubrication or oil mist lubrication, the present application proposes a new spider hand micro-bead negative pressure lubrication system, thereby completely solving the drawbacks of the traditional spider hand lubrication system. Summary of the invention

[0005] The purpose of the present invention is to address the shortcomings of the existing oil-immersed lubrication and oil mist lubrication for lubricating spider hands, and to provide a new micro-bead oil lubrication method for lubricating spider hands and a corresponding spider hand micro-bead negative pressure lubrication system to solve the technical problems and shortcomings of traditional oil-immersed lubrication and oil mist lubrication.

[0006] The present invention is achieved through the following technical solutions: A spider hand micro-ball negative pressure lubrication system, comprising a spider hand, a micro-ball oil unit and a waste oil vacuum recovery unit, wherein a transmission chamber and an oil return chamber are arranged in communication with each other inside the spider hand, the micro-ball oil unit is arranged in communication with the transmission chamber, and the waste oil vacuum recovery unit is arranged in communication with the oil return chamber; The micro-bead oil unit comprises an oil storage tank, a micro-bead oil generator, a micro-bead oil delivery pipe and a nozzle. The micro-bead oil generator is connected to the oil storage tank, and one end of the micro-bead oil generator is provided with a compressed air inlet pipe, and the other end is connected to the micro-bead oil delivery pipe. The micro-bead oil delivery pipe extends to the end of the transmission chamber and is connected to the nozzle. The waste oil vacuum recovery unit comprises a recovery box, a vacuum pump, an oil filter element and a negative pressure pipe. The oil filter element is arranged in the recovery box. The vacuum pump and the negative pressure pipe are respectively connected to the recovery box on both sides of the oil filter element. The negative pressure pipe is connected to the oil return chamber.

[0007] As a specific setting of the above scheme, the micro-bead oil generator includes a body and a cover, a conical reflow slot is opened at the center of the body, an airflow ring groove is opened concentrically on the periphery of the conical reflow slot, a compressed air inlet is connected between the conical reflow slot and the airflow ring groove, and an impact convex tooth is arranged on the inner wall of the upper end of the conical reflow slot between the conical reflow slot and the airflow ring groove, an oil blind hole and a micro-bead oil blind hole are opened on the body between the conical reflow slot and the airflow ring groove, and connecting channels are opened between the oil blind hole, the micro-bead oil blind hole and the upper end of the conical reflow slot, and a compressed air inlet connected to the airflow ring groove, an oil inlet connected to the oil blind hole, and a micro-bead oil outlet connected to the micro-bead oil blind hole are opened on the cover.

[0008] As a specific setting of the above scheme, the compressed air inlet duct is arranged along the tangential direction of the conical reflow slot and is connected to the upper end of the conical reflow slot, and a plurality of the impact convex teeth are continuously arranged on the inner wall of the upper end of the conical reflow slot.

[0009] As a specific setting of the above scheme, the nozzle includes a dumbbell-shaped nozzle body, and a plurality of radial holes are evenly opened circumferentially on the outer circular surface of the dumbbell head end of the nozzle body, and a plurality of oblique holes are evenly opened circumferentially on the inclined surfaces on both sides of the dumbbell head end of the nozzle body.

[0010] As a specific configuration of the above solution, an axially movable nozzle adjustment cone is provided on the end surface of the dumbbell head end of the nozzle body.

[0011] As a specific configuration of the above solution, a threaded hole is provided on the end surface of the dumbbell head end of the nozzle body, and the nozzle adjusting cone is threadedly connected to the threaded hole.

[0012] As a specific setting of the above scheme, the spider hand includes a spider body, a main shaft arm and a support seat, the transmission chamber and the oil return chamber are arranged in the spider body, the inner end of the main shaft arm extending into the transmission chamber is connected to a planetary gear transmission mechanism, the outer end of the main shaft arm is sealed and rotatably connected to the support seat, the outer end of the extension shaft in the planetary gear mechanism is connected to the spider arm, and a sealing layer is arranged at the position where the extension shaft extends out of the transmission chamber.

[0013] As a specific setting of the above scheme, the micro-bead oil delivery pipe is arranged along the channel in the main shaft arm to extend into the transmission chamber, the main shaft arm is connected with an oil return pipe located in the oil return chamber, the outer end of the main shaft arm is connected to the support seat, and the negative pressure pipe is connected to the support seat.

[0014] When the spider hand micro-bead negative pressure lubrication system disclosed in the present invention is in operation, semi-suspended micro-oil beads with a diameter between 30 and 70 um (flow characteristics are between gaseous and liquid states, with a small volume density, similar to gas, and good fluidity) can be generated through the micro-bead oil unit, and sprayed into the transmission cavity of the spider hand through a nozzle. Since the micro-oil beads have a larger diameter than the oil mist, on the one hand, the micro-oil beads are more likely to contact with the transmission parts inside the transmission cavity, thereby quickly forming an oil film to achieve lubrication. On the other hand, the micro-oil beads will not be easily and quickly drawn out of the transmission cavity under the action of negative pressure like the oil mist, so that the micro-oil beads can remain in the transmission cavity for a certain period of time to contact and lubricate the transmission parts.

[0015] At the same time, due to the action of the waste oil vacuum recovery unit, negative pressure will be formed inside the spider body. On the one hand, the negative pressure environment is an important condition for the production and transportation of micro-bead oil. On the other hand, the negative pressure environment can ensure that the liquid lubricating oil remaining in the spider body will not leak out. Once the seal of the spider's arm joint is damaged, since the external environmental pressure is higher than the internal negative pressure, only air will leak into the spider body, and the micro-bead oil in the spider body will not leak out, fundamentally solving the "product and environmental pollution" accident caused by lubricating oil leakage.

[0016] In addition, the present invention has a special design for the nozzle structure, and adopts a dumbbell-shaped radiation nozzle to direct the micro-bead oil into the transmission cavity, so that the micro-bead oil can be sprayed to the lubrication point at a pre-designed angle and position to solve the bearing and gear lubrication problem in the lubrication spider body.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: The spider hand micro-bead negative pressure lubrication system disclosed in the present invention changes the traditional lubrication mode and eliminates a large amount of liquid lubricating oil in the spider body. It not only solves the liquid operation noise generated by the large amount of lubricating oil in the spider body when the machine is running, but also solves the problem that a large amount of heat generated by the lubricating oil during operation cannot be effectively dissipated, and the running speed of the spider hand can only be reduced. It also avoids the problem that the spider hand seal is damaged due to excessive temperature of the lubricating oil, thereby improving the operating efficiency and service life of the spider hand.

[0018] The spider arm of the present invention is in a negative pressure state inside during operation, which effectively ensures that the spider arm seal will not leak lubricating oil to the outside under any state (normal working state or damaged state), thereby avoiding the occurrence of product quality accidents. The spider arm is especially suitable for use in fields such as food and medicine.

[0019] The present invention introduces semi-suspended micro-oil droplets with a diameter of 30 to 70 um into the spider's hand. Not only do the micro-oil droplets have flow characteristics between those of a gas and a liquid, so that they can be smoothly delivered into the spider's hand under relatively low power, but also, compared to oil mist, they can quickly form an oil film when contacting and settling with a transmission part to achieve lubrication. At the same time, unlike oil mist, they are not easily drawn away in large quantities under the action of negative pressure, resulting in poor lubrication film-forming effect, thereby effectively ensuring the lubrication effect on the spider's hand.

[0020] The micro-bead lubricating oil in the present invention circulates, so that no old liquid lubricating oil is accumulated in the spider body, and the required lubricating oil is fresh lubricating oil provided in time, thereby ensuring the lubrication quality.

[0021] The flow characteristics of the micro-bead oil in the present invention are between gas and liquid, and can be precisely controlled by controlling the flow rate of the gas introduced, thereby avoiding excessive waste of lubricating oil. At the same time, since there is no large amount of liquid lubricating oil in the spider body, the operating quality of the spider hand is reduced, energy consumption is reduced, and the energy-saving effect is significant. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 It is a schematic diagram of the internal plane structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the micro-bead oil generator of the present invention; Figure 3 It is a schematic diagram of the planar structure of the micro-bead oil generator of the present invention; Figure 4 for Figure 2 A schematic diagram of the enlarged structure at A in the middle; Figure 5 It is a schematic diagram of the internal planar structure of the nozzle in the present invention. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0025] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Figures 1 to 5 , and describes the application in detail with reference to embodiments. Example 1

[0026] Example 1 discloses a spider hand micro-ball negative pressure lubrication system, see attached Figure 1 The main body of the system includes a spider hand 1, a micro-bead oil unit 2 and a waste oil vacuum recovery unit 3. Among them, the spider hand 1 is a modified design based on the existing spider hand, including a spider body 100, a main shaft arm 101 and a support seat 102. A transmission chamber 103 and an oil return chamber 104 are arranged in the spider body 100. A planetary gear transmission mechanism 105 is arranged in the oil return chamber 104, and a spider arm 106 is connected to the outer end of each independent extension shaft in the planetary gear mechanism 105. At the same time, a corresponding sealing layer 107 is arranged at the position where the extension shaft extends out of the transmission chamber 103. The design of the sealing layer 107 can ensure the sealing inside the transmission chamber 103. The main shaft arm 101 extends into the transmission chamber 103 along the axial direction of the spider body 100 to interact with the planetary gear transmission mechanism 105, and a channel is opened inside the main shaft arm 101 along its axial direction. At the same time, the main shaft arm 101 is connected with an oil return pipe 108 located in the oil return chamber 104. In addition, the support seat 102 is rotatably connected to the outer end of the main shaft arm 101 , and the outer end of the main shaft arm 101 is connected to the support seat 102 .

[0027] The micro-bead oil unit 2 includes an oil storage tank 201 and a micro-bead oil generator 202. An oil delivery pipe 203 is connected between the micro-bead oil generator 202 and the oil storage tank 201, so that the lubricating oil in the oil storage tank 201 can be delivered to the inside of the micro-bead oil generator 202 by the oil delivery pipe 203. Then, a compressed air inlet pipe 204 is arranged at one end of the micro-bead oil generator 202, and a micro-bead oil delivery pipe 205 is arranged at the other end of the micro-bead oil generator 202. The micro-bead oil delivery pipe 205 extends into the transmission chamber 103 along the channel in the main shaft arm 101, and a nozzle 206 is connected to the end of the micro-bead oil delivery pipe 205 extending into the transmission chamber 103.

[0028] Reference Figures 2~4 The micro-bead oil generator in this embodiment includes a body 401 and a cover 402, a downwardly recessed conical reflow slot 403 is provided at the center of the upper surface of the body 401, an airflow annular groove 404 is concentrically provided on the upper surface of the body 401 outside the conical reflow slot 403, and then a compressed air inlet 405 is provided on the upper surface of the body 401 along the tangential direction of the reflow slot 403, so that the inner end of the compressed air inlet 405 is connected to the upper end of the reflow slot 403 along the tangential direction, and the outer end of the compressed air inlet 405 is connected to the airflow annular groove 404.

[0029] An oil blind hole 406 and a micro-bead oil blind hole 407 are respectively provided on the body 401 between the conical reflux slot 403 and the airflow annular groove 404, and a connecting passage 408 is provided between the upper end of the oil blind hole 406 and the upper end of the conical reflux slot 403, and between the upper end of the micro-bead oil blind hole 407 and the upper end of the conical reflux slot 403. A plurality of continuous impact convex teeth 409 are provided on the inner wall of the upper end of the conical reflux slot 403 between the fan-shaped angles of the oil blind hole 406 and the micro-bead oil blind hole 407. Finally, the cover 402 is pressed and fixed on the upper surface of the body 401 through a connecting piece, and then a compressed air inlet hole 410 arranged opposite to the airflow annular groove 404, an oil inlet hole 411 connected with the oil blind hole 406 up and down, and a micro-bead oil outlet hole 412 connected with the micro-bead oil blind hole 407 up and down are provided on the cover 402.

[0030] During the operation of the micro-bead oil generator in this embodiment 1, the compressed gas will enter the air flow annular groove 404 through the compressed gas inlet hole 410, and then enter the upper end of the conical reflow slot hole 403 through the compressed gas inlet duct 405. Since the compressed gas inlet duct 405 is arranged along the tangential direction, the compressed gas will rotate along the inner wall of the upper end of the conical reflow slot hole 403 to form a vortex. At this time, the lubricating oil in the oil blind hole 406 flows into the upper end of the tapered reflux slot 403 through the connecting channel 408 and is affected by the compressed airflow, so that it rotates and flows rapidly along the inner wall of the upper end of the tapered reflux slot 403 in the fan-shaped angle area of ​​the oil blind hole 406 and the micro-bead oil blind hole 407, and continuously collides with the impact convex tooth 409 during the flow process, and is cut and separated by the speed difference and density difference between the two, so that the liquid lubricating oil is separated into micro-bead oil droplets, among which the larger oil droplets or unseparated oil flow out from the lower end of the tapered reflux slot 403 under the action of gravity, and the semi-suspended oil droplets with a diameter between 30 and 70 um can enter the micro-bead oil blind hole 407 with the airflow, and finally be sent out from the micro-bead oil outlet hole 412, and enter the transmission cavity 103 of the spider hand along the micro-bead oil delivery pipe 205.

[0031] In addition, in order to ensure that the micro-bead oil entering the transmission chamber 103 can have a larger spray range, so that the planetary gear transmission mechanism in the spider hand is fully in contact with the micro-bead oil for lubrication, the nozzle 206 is specially designed. Figure 5, including a dumbbell-shaped nozzle body 2061, the channel inside the nozzle body 2061 is connected to the micro-oil delivery pipe 205. A plurality of radial holes 2062 are uniformly opened circumferentially on the outer circumferential surface of the dumbbell head end of the nozzle body 2061, and then a plurality of oblique holes 2063 are uniformly opened circumferentially on the inclined surfaces on both sides of the dumbbell head end of the nozzle body 2061, and the angles α and β between the oblique holes 2063 at both ends and the axis can be adjusted according to actual conditions. Finally, a threaded hole is opened on the end face of the dumbbell head end of the nozzle body 2061, and a nozzle adjustment cone 2064 is spirally screwed in the threaded hole, and a flat or cross groove is opened on the outer end face of the nozzle adjustment cone 2064, so that it is convenient to use a screwdriver to twist it, thereby adjusting the axial position of the nozzle adjustment cone 2064, thereby achieving the effect of adjusting the micro-oil flow rate.

[0032] This embodiment uses the above-mentioned special nozzle 206 design to enable the micro-bead oil to be sprayed radially to all areas inside the transmission chamber 103, ensuring that the planetary gear transmission mechanism 105 in the transmission chamber 103 can quickly and fully contact with the micro-bead oil, and then the micro-bead oil settles and adheres to its surface to form an oil film, so that it has a better lubrication effect.

[0033] Reference Figure 1 The waste oil vacuum recovery unit 3 includes a recovery box 301, a vacuum pump 302 and an oil filter element 303. The oil filter element 303 is arranged inside the recovery box 301, and the vacuum pump 302 is connected to the recovery box 301 above the oil filter element 303, and then a negative pressure pipe 304 is connected to the recovery box 301 below the oil filter element 303, and the negative pressure pipe 304 is connected to the inner cavity of the support seat 102. At the same time, a through hole connected to the inner cavity of the support seat 102 is opened at the end of the main shaft arm 101.

[0034] During the operation of the spider hand micro-ball negative pressure lubrication system disclosed in the present embodiment 1, compressed air and lubricating oil are introduced into the micro-ball oil generator 202 at the same time. The introduced compressed air first enters the air flow ring groove 404 to form a rotating air flow, and then enters the upper end of the conical reflux slot 403 along the tangential direction from the compressed air inlet 405, and then rotates along the upper end inner wall of the conical reflux slot 403 to the connecting channel 408 corresponding to the oil blind hole 406. At this time, the lubricating oil in the oil blind hole 406 enters the conical reflux slot 403 from the connecting channel 408 and is subjected to the rotating pressure. Under the action of the contraction airflow, the oil is carried toward the impact convex tooth 409 and continuously impacts and separates with the impact convex tooth 409, thereby forming micro-beads of oil, among which the larger oil beads and the unseparated liquid oil flow out from the lower end of the conical reflux slot 403 under the action of gravity, and the semi-suspended oil beads with a diameter of 30~70um can be sent out from the micro-bead oil blind hole 407 along the airflow, and then enter the spider hand along the micro-bead oil delivery pipe 205, and finally dispersed and sprayed to the surroundings by the nozzle 206 to contact the planetary gear mechanism 105 for lubrication.

[0035] The waste oil vacuum recovery unit 3 operates synchronously, and a negative pressure is formed inside the recovery box 301, the negative pressure pipe 304 and the spider hand 1 through the vacuum pump 302. The negative pressure state inside the spider hand 1 can not only draw the gas, micro-bead oil and the liquefied waste oil after use into the recovery box 301, but also the existence of the negative pressure state can prevent the lubricating oil from leaking out after the spider hand seal is damaged, completely solving the drawbacks of the traditional spider hand lubrication system.

[0036] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A spider hand micro-ball negative pressure lubrication system, characterized in that: It comprises a spider hand, a micro-bead oil unit and a waste oil vacuum recovery unit, wherein a transmission chamber and an oil return chamber are arranged in communication with each other inside the spider hand, the micro-bead oil unit is arranged in communication with the transmission chamber, and the waste oil vacuum recovery unit is arranged in communication with the oil return chamber; The micro-bead oil unit comprises an oil storage tank, a micro-bead oil generator, a micro-bead oil delivery pipe and a nozzle. The micro-bead oil generator is connected to the oil storage tank, and one end of the micro-bead oil generator is provided with a compressed air inlet pipe, and the other end is connected to the micro-bead oil delivery pipe. The micro-bead oil delivery pipe extends to the end of the transmission chamber and is connected to the nozzle. The waste oil vacuum recovery unit comprises a recovery box, a vacuum pump, an oil filter element and a negative pressure pipe. The oil filter element is arranged in the recovery box. The vacuum pump and the negative pressure pipe are respectively connected to the recovery box on both sides of the oil filter element. The negative pressure pipe is connected to the oil return chamber.

2. The spider hand micro-ball negative pressure lubrication system according to claim 1, characterized in that: The micro-bead oil generator includes a body and a cover, a conical reflow slot is provided at the center of the body, an airflow annular groove is provided concentrically on the periphery of the conical reflow slot, a compressed air inlet is provided between the conical reflow slot and the airflow annular groove, and an impact convex tooth is provided on the inner wall of the upper end of the conical reflow slot between the conical reflow slot and the airflow annular groove, an oil blind hole and a micro-bead oil blind hole are provided on the body between the conical reflow slot and the airflow annular groove, and connecting channels are provided between the oil blind hole, the micro-bead oil blind hole and the upper end of the conical reflow slot, and a compressed air inlet connected to the airflow annular groove, an oil inlet connected to the oil blind hole, and a micro-bead oil outlet connected to the micro-bead oil blind hole are provided on the cover.

3. The spider hand micro-ball negative pressure lubrication system according to claim 2, characterized in that: The compressed air inlet passage is arranged along the tangent direction of the conical reflow slot and is connected with the upper end of the conical reflow slot. A plurality of impact convex teeth are continuously arranged on the inner wall of the upper end of the conical reflow slot.

4. The spider hand micro-ball negative pressure lubrication system according to claim 1, characterized in that: The nozzle comprises a dumbbell-shaped nozzle body, a plurality of radial holes are evenly arranged on the outer circumferential surface of the dumbbell head end of the nozzle body, and a plurality of oblique holes are evenly arranged on the inclined surfaces on both sides of the dumbbell head end of the nozzle body.

5. The spider hand micro-ball negative pressure lubrication system according to claim 4, characterized in that: An axially movable nozzle adjusting cone is arranged on the end surface of the dumbbell head end of the nozzle body.

6. The spider hand micro-ball negative pressure lubrication system according to claim 5, characterized in that: A threaded hole is provided on the end surface of the dumbbell head end of the nozzle body, and the nozzle adjusting cone is threadedly connected with the threaded hole.

7. The spider hand micro-ball negative pressure lubrication system according to claim 1, characterized in that: The spider hand includes a spider body, a main shaft arm and a support seat. The transmission chamber and the oil return chamber are arranged in the spider body. The inner end of the main shaft arm extending into the transmission chamber is connected to a planetary gear transmission mechanism. The outer end of the main shaft arm is sealed and rotatably connected to the support seat. The outer end of the extension shaft in the planetary gear mechanism is connected to the spider arm, and a sealing layer is arranged at the position where the extension shaft extends out of the transmission chamber.

8. The spider hand micro-ball negative pressure lubrication system according to claim 7, characterized in that: The micro-bead oil delivery pipe is arranged along the channel in the main shaft arm to extend into the transmission cavity, the main shaft arm is connected with an oil return pipe located in the oil return cavity, the outer end of the main shaft arm is connected to the support seat, and the negative pressure pipe is connected to the support seat.

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