Self-lubricating speed reducer based on pole climbing effect

Abstract

The invention relates to the technical field of speed reducers, in particular to a pole-climbing-effect-based self-lubricating speed reducer which comprises a case, a power mechanism and a lubricating medium circulating mechanism, a worm gear, a worm and a planetary speed reducer are arranged in the case, and according to the pole-climbing-effect-based self-lubricating speed reducer, the worm is accelerated to quickly convey lubricating grease into the planetary speed reducer for lubrication. The low-speed worm enters the inner cavity to be lubricated and enters the oil return hole under the action of gravity to achieve self-lubricating circulation through the filtering device, self-lubricating of the speed reducer can be achieved, system redundancy is reduced, the structure is simplified, and meanwhile equipment reliability and maintainability are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of reducers, and in particular to a self-lubricating reducer based on a climbing rod effect. Background Art

[0002] Speed ​​reducers are widely used in the machinery industry as transmission devices. In the prior art, hydraulic systems are often connected to speed reducers to provide active lubrication solutions, thereby realizing intelligent and unmanned equipment. These hydraulic systems include control boxes, hydraulic oil sources, pump stations, pipelines, and functional valves on the pipelines. These components make speed reducers that were originally designed to achieve simple lubrication functions often appear complicated due to such secondary functions. In addition, an additional hydraulic system often means that performance parameters such as reliability and maintainability of the entire equipment are reduced, and parameters such as energy consumption, weight, and size are increased, making the equipment complex due to a certain type of secondary function and increasing maintenance costs. Summary of the invention

[0003] In order to overcome the shortcomings of the prior art, the present invention provides a self-lubricating reducer based on the climbing rod effect, which utilizes the climbing rod effect in fluid mechanics to achieve self-lubrication of the reducer, reduce system redundancy and streamline structure, while improving equipment reliability and maintainability, and reducing equipment energy consumption, weight, size and other parameters.

[0004] To achieve the above object, the present invention provides the following technical solution: a self-lubricating reducer based on the climbing rod effect, comprising a first reduction mechanism, including a chassis having an inner chamber and an outer chamber, a worm wheel and a low-speed worm installed in the inner chamber, the worm wheel meshing with the low-speed worm; and The second reduction mechanism comprises a planetary reducer installed in the outer chamber, the planetary reducer is composed of a planet carrier, a connecting shaft, an inner gear ring, a planetary gear and a sun gear that cooperate with each other, one end of the low-speed worm extends into the outer chamber and is fixed to the center of the planet carrier; and The power mechanism comprises a medium storage box and a power assembly, wherein the medium storage box is fixedly connected to the chassis, and the inner cavity of the medium storage box is connected to the inner chamber through the outer chamber; the power assembly comprises a high-speed worm installed in the medium storage box and extending to the outer chamber, and the sun gear is sleeved on the top of the high-speed worm; and The lubricating medium circulation mechanism comprises a filtering device and a plurality of oil return pipes. The filtering device is connected with the inner chamber and the medium storage box through the oil return pipes.

[0005] Preferably, the outer chamber is located at the lower side of the inner chamber, and the medium storage box is located at the lower side of the chassis.

[0006] Preferably, an inverted conical bucket with an opening at the upper end is provided on the inner side of the lower portion of the chassis, and the lower end of the low-speed worm is arranged through the opening.

[0007] Preferably, the upper portion of the inner cavity of the medium storage box is narrow at the top and wide at the bottom.

[0008] Preferably, an oil return hole is opened at the lower part of the inner chamber; the horizontal height of the oil return hole is not higher than the horizontal height of the opening; and the oil return pipe is connected to the oil return hole.

[0009] Preferably, the lubricating medium circulation mechanism further includes a cooling device; the cooling device is selectively arranged corresponding to the oil return pipe.

[0010] Preferably, the cooling device is arranged on an oil return pipe connected between the filter device and the medium storage box.

[0011] Preferably, the cooling device comprises a cold plate with fins on the outer surface, and the oil return pipe is arranged through the cold plate.

[0012] Preferably, the portion of the oil return pipe located inside the cold plate is bent.

[0013] Preferably, the filtering device comprises a centrifugal solid-liquid separator, and a sewage pipe is provided on the centrifugal solid-liquid separator.

[0014] Compared with the prior art, the present invention has the following beneficial effects: (1) The self-lubricating reducer based on the climbing rod effect uses the accelerating worm to quickly transport grease into the planetary reducer for lubrication, uses the low-speed worm to enter the inner chamber for lubrication, and enters the return oil hole through the filtering device under the action of gravity to enter the next round of circulation. The lubrication device has a simple structure, is economical and energy-saving, and relies on the characteristics of the grease itself to achieve full equipment lubrication. Compared with previous technologies, there is no need to install an additional hydraulic system on the pipeline, which improves the reliability and maintainability of the reducer and reduces the weight and size of the reducer and the required additional interfaces.

[0015] (2) During the grease climbing process, the planetary reducer is used to reduce the shear rate of the grease, so that the flow state of the grease can be transformed from a high-speed and high-viscosity state to a low-speed and low-viscosity state, without the need for an additional flow state conversion device.

[0016] (3) The pipeline is equipped with a filtering device and a cooling device, which can efficiently purify and cool the grease, thereby reducing the thermal expansion of the reducer metal material, solving the heat generation problem of the reducer during long-term operation and extending the service life of the reducer.

[0017] (4) The V-shaped oil collecting port on the reducer housing can smoothly introduce the used grease into the pipeline, preventing the grease from carrying tiny particles and wear debris back along the original path and affecting the parts on the original path. It has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the cross-sectional structure of the self-lubricating reducer of the present invention; Figure 2 It is a schematic diagram of the structure of the cooling device and the oil return pipe of the present invention; Figure 3 It is a schematic structural diagram of the planet carrier and the connecting shaft of the present invention.

[0019] In the figure: 1 chassis, 101 conical bucket, 102 inner chamber, 103 outer chamber, 104 oil return hole, 2 worm gear, 3 low-speed worm, 4 planetary carrier, 5 connecting shaft, 6 inner ring gear, 7 planetary gear, 8 sun gear, 9 power assembly, 901 high-speed worm, 902 coupling, 903 motor, 10 medium storage box, 11 first oil return pipe, 12 filtering device, 13 second oil return pipe, 14 sewage pipe, 15 cooling device. DETAILED DESCRIPTION

[0020] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that those skilled in the art can more clearly understand how to practice the present invention. Although the present invention is described in conjunction with its preferred specific embodiments, these embodiments are only illustrative, rather than limiting the scope of the present invention.

[0021] See also Figure 1-3 In one embodiment of the present invention, a self-lubricating reducer based on a climbing rod effect comprises: The first reduction mechanism includes a chassis 1, a worm wheel 2 and a low-speed worm 3. An inverted conical bucket 101 is provided on the inner side of the lower part of the chassis 1. The inverted conical bucket 101 has a narrow upper and wide lower structure. The conical bucket 101 divides the inner cavity of the chassis 1 into two chambers, one on the upper side and one on the lower side. The upper chamber is an inner chamber 102, and the lower chamber is an outer chamber 103. An opening is provided on the top of the conical bucket 101. The worm wheel 2 and the low-speed worm 3 are installed in the inner chamber 102, and the worm wheel 2 is meshed with the low-speed worm 3. The low-speed worm The lower through opening of the chassis 1 extends into the outer chamber 103, and it can be seen that the inner chamber 102 is connected to the outer chamber 103; in addition, due to the setting of the conical bucket 101, the opening of the top wall of the outer chamber 103 is higher than the bottom of the inner chamber 102, and the bottom of the chassis 1 is V-shaped. During the self-lubricating process, the bottom of the V-shaped structure is more conducive to the concentration of grease and impurities inside the grease, such as tiny particles and grinding chips; further, the bottom of the V-shaped structure is provided with an oil return hole 104 connected to the outside.

[0022] The second reduction mechanism includes a planetary reducer installed in the outer chamber, and the planetary reducer consists of a planetary carrier 4, three connecting shafts 5, an inner ring gear 6, three planetary gears 7 and a sun gear 8 that cooperate with each other. Specifically, the inner ring gear 6 is installed in the outer chamber, the sun gear 8 is coaxially arranged at the center of the inner ring gear 6, the three planetary gears 7 are arranged between the inner ring gear 6 and the sun gear 8, and the planetary gear 7 is meshed with the inner ring gear 6 and the sun gear 8; the connecting shaft 5 and the planetary gear 7 are arranged correspondingly, and the three planetary gears 7 are fixedly connected to the planetary carrier 4 through the connecting shaft 5 to achieve linkage; the lower end of the low-speed worm 3 is fixedly connected to the center of the planetary carrier 4.

[0023] A power mechanism, a medium storage box 10 and a power assembly 9, wherein the medium storage box 10 is fixed to the lower end of the chassis 1 by screws, and the inner cavity of the medium storage box 10 is communicated with the outer cavity. It can also be understood that the inner cavity of the medium storage box 10 is communicated with the inner cavity through the outer cavity; The power assembly 9 includes a high-speed worm 901, a coupling 902 and a motor 903. The high-speed worm 901 is installed in the medium storage box 10. The upper end of the high-speed worm 901 extends to the outer chamber and is fixedly connected to the sun gear 8. The lower end of the high-speed worm 901 extends to the outside of the medium storage box 10 and is connected to the output shaft of the motor 903 through the coupling 902. The high-speed worm 901, the sun gear 8 and the low-speed worm 3 are coaxially arranged.

[0024] The lubricating medium circulation mechanism is arranged on the outside of the chassis 1 and the medium storage box 10, and is used for removing impurities, purifying and cooling the grease to ensure the lubricating quality of the grease and improve the working performance of the self-lubricating reducer; specifically, the lubricating medium circulation mechanism includes a first oil return pipe 11, a filter device 12, a second oil return pipe 13, a drain pipe 14 and a cooling device 15, the filter device 12 is connected to the oil return hole 104 through the first oil return pipe 11, and the filter device 12 is connected to the medium storage box 10 through the second oil return pipe 13, and is used for removing impurities and purifying the grease flowing to the medium storage box 10 through the first oil return pipe 11 and the second oil return pipe 13; The drain pipe 14 is arranged on the filter device 12 for discharging impurities to the outside of the filter device 12 ; the cooling device 15 is arranged in cooperation with the second oil return pipe 13 for cooling the grease flowing to the medium storage box 10 through the second oil return pipe 13 .

[0025] In one embodiment, the upper portion of the inner cavity of the medium storage box 10 is narrow at the top and wide at the bottom. This design can make the process of grease flowing from the medium storage box 10 to the outer chamber and then into the inner chamber smoother. In addition, the structure of the conical bucket 101 is also narrow at the top and wide at the bottom. This can effectively prevent the grease from flowing back and make the grease circulate in one direction as much as possible. The unidirectional flow allows the grease to fully flow through the lubricating medium circulation mechanism, thereby ensuring the working performance of the self-lubricating reducer.

[0026] In one embodiment, the filtering device 12 is a centrifugal solid-liquid separator, and of course it can also be other devices with filtering functions, so long as it can ultimately remove impurities inside the grease.

[0027] In one embodiment, Figure 2 As shown, the cooling device 15 is a cold plate with fins on its outer surface. The cold plate is connected to the refrigerant of the external device, and the second oil return pipe 13 is arranged to pass through the cold plate. In order to improve the cooling efficiency, the part of the second oil return pipe 13 located in the cooling device 15 can be bent, and the heat dissipation efficiency can be improved by increasing the contact area with the cooling device 15.

[0028] In one embodiment, the high-speed worm 901 is not limited to a worm structure, but may also be a lead screw. The spirally ascending structure can generate a strong axial shear force under the action of the driving force, thereby causing the fluid to climb upward along the axial direction to achieve the purpose of self-lubrication.

[0029] The working principle of this reducer is as follows: a shear thickening fluid is selected as the lubricating medium, and a high-speed worm 901 is driven to rotate by a motor. The shear force applied by the high-speed worm 901 in the medium storage box 10 causes the lubricating medium to quickly climb up along the high-speed worm 901 into the outer chamber. Furthermore, the planetary reducer sun gear 8 on the high-speed worm 901 meshes with the planetary reducer planetary gear 7 to transfer the lubricating medium to each other. In the process of the grease climbing up the rod, the planetary reducer is used to reduce the shear rate of the grease, so as to realize the flow state transformation of the grease from a high-speed and high-viscosity state to a low-speed and low-viscosity state, without the need for an additional flow state conversion device. When the lubricating medium is continuously injected into the outer chamber until it is full, the rotating low-speed worm 3 brings the lubricating medium into the inner chamber, and the lubricating medium entering the inner chamber is Part of the lubricating medium is transferred to the worm gear 2 for lubrication, and the other part of the lubricating medium continues to climb to a certain height with the low-speed worm 3. Due to the action of the planetary reducer, the shear force provided by the low-speed worm 3 at a low speed to the lubricating medium climbing with the low-speed worm 3 is not enough to overcome the self-gravity of the climbing lubricating medium, and gradually falls back to the V-shaped oil return hole 104 at the bottom of the inner chamber under the action of gravity, and then enters the filter device 12 through the first oil return pipe 11 under the action of gravity. The tiny particles and grinding chips separated by the filter device 12 are discharged from the drain pipe 14 through the filter screen in the filter device 12. The filtered lubricating medium passes through the second oil return pipe 13, is cooled by the cooling device 15, and then returns to the medium storage box 10 to enter the next cycle.

[0030] Through this technical solution, a self-lubricating reducer based on the climbing rod effect utilizes a high-speed worm to quickly transport grease into the planetary reducer for lubrication, utilizes a low-speed worm to enter the inner chamber for lubrication and enters the oil return hole under the action of gravity to enter the next cycle through the filtering device. The lubrication device has a simple structure, is economical and energy-saving, and relies on the characteristics of the grease itself to achieve lubrication of the entire equipment. Compared with previous technologies, there is no need to install an additional hydraulic system on the pipeline, which improves the reliable working performance and maintainability of the reducer, and also reduces the weight and size of the reducer and the required additional interfaces.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A self-lubricating reducer based on climbing rod effect, characterized in that: include: A first speed reduction mechanism comprises a housing (1) having an inner chamber and an outer chamber, a worm wheel (2) mounted in the inner chamber, and a low-speed worm (3), wherein the worm wheel (2) meshes with the low-speed worm (3); as well as The second reduction mechanism comprises a planetary reducer installed in the outer chamber, the planetary reducer comprises a planet carrier (4), a connecting shaft (5), an inner gear ring (6), a planetary gear (7) and a sun gear (8) that cooperate with each other, one end of the low-speed worm (3) extends into the outer chamber and is fixedly connected to the center of the planet carrier (4); as well as The power mechanism comprises a medium storage box (10) and a power assembly (9), wherein the medium storage box (10) is fixedly connected to the chassis (1), and the inner cavity of the medium storage box (10) is connected to the inner chamber via the outer chamber; the power assembly (9) comprises a high-speed worm (901) installed in the medium storage box (10) and extending to the outer chamber, and the sun gear (8) is sleeved on the top of the high-speed worm (901); as well as The lubricating medium circulation mechanism comprises a filter device (12) and a plurality of oil return pipes, wherein the filter device (12) is connected to both the inner chamber and the medium storage box (10) through the oil return pipes.

2. The self-lubricating reducer based on the climbing rod effect according to claim 1 is characterized in that: The outer chamber is located at the lower side of the inner chamber, and the medium storage box (10) is located at the lower side of the chassis (1).

3. The self-lubricating reducer based on the climbing rod effect according to claim 2 is characterized in that: An inverted conical bucket (101) is provided on the inner side of the lower portion of the chassis (1) and has an opening at the upper end, and the lower end of the low-speed worm (3) is arranged to penetrate the opening.

4. A self-lubricating reducer based on the climbing rod effect according to claim 2 or 3, characterized in that: The upper part of the inner cavity of the medium storage box (10) is in a structure that is narrow at the top and wide at the bottom.

5. The self-lubricating reducer based on the climbing rod effect according to claim 3 is characterized in that: An oil return hole (104) is provided at the lower part of the inner chamber; the horizontal height of the oil return hole (104) is not higher than the horizontal height of the opening; and the oil return pipe is in communication with the oil return hole (104).

6. The self-lubricating reducer based on the climbing rod effect according to claim 1, characterized in that: The lubricating medium circulation mechanism further comprises a cooling device (15); the cooling device (15) is selectively arranged corresponding to the oil return pipe.

7. The self-lubricating reducer based on the climbing rod effect according to claim 6 is characterized in that: The cooling device (15) is arranged on an oil return pipe connected between the filter device (12) and the medium storage box (10).

8. The self-lubricating reducer based on the climbing rod effect according to claim 7 is characterized in that: The cooling device (15) comprises a cold plate with fins provided on the outer surface, and the oil return pipe is arranged through the cold plate.

9. The self-lubricating reducer based on the pole climbing effect according to claim 8, characterized in that: The portion of the oil return pipe located on the inner side of the cold plate is bent.

10. The self-lubricating reducer based on the pole climbing effect according to claim 1, characterized in that: The filtering device (12) comprises a centrifugal solid-liquid separator, and a sewage discharge pipe is provided on the centrifugal solid-liquid separator.

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