A reduction gearbox assembly

Abstract

The application discloses a kind of reduction gearbox assemblies, belong to transmission device technical field, this reduction gearbox assemblies, including high-speed shaft and low-speed shaft, the high-speed shaft and low-speed shaft are ninety degrees angle misplacement arrangement, the low-speed shaft middle part is equipped with helical gear, the high-speed shaft circumferential outer wall is equipped with the helical tooth groove meshed with helical gear;Bottom cover, the bottom cover is located vertically arranged high-speed shaft directly below, the high-speed shaft bottom end coaxial sleeve is equipped with bushing, the bottom cover middle part is installed with the top pressure piece and penetrates.This application is equipped with high-speed shaft, low-speed shaft, bottom cover, conveying shell and shell, and the bushing is avoided to be extruded directly by high-speed shaft bottom surface by the top pressure piece on the top bushing of bottom cover position installation, generates wear, and the vertically installed high-speed shaft is pushed upward, so that the helical top surface of helical tooth groove and helical gear are directly extruded contact, eliminate the assembly gap of meshing position, avoid the transmission idle of gear combination not tight generation, improve transmission accuracy.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of transmission devices, and particularly relates to a reduction gearbox assembly. BACKGROUND

[0002] A speed reducer utilizes a gear speed converter to reduce the number of revolutions of a motor to the required number of revolutions and increase torque in the process, wherein a worm and gear speed reducer is a common power transmission mechanism, such speed reducers are widely used in the industrial field, and a box body, as a basic component, supports and contains all other components depending on the meshing of a worm and a gear, and reduction and torque increase are achieved through sliding friction between tooth surfaces, such a transmission mode is equivalent to a screw transmission, has a large reduction ratio, and has a reverse self-locking function, further improving the safety in specific application scenarios.

[0003] The existing Chinese utility model patent with the patent number CN201739435U discloses a worm and gear speed reducer, a shell is provided with an input flange at a mounting hole, and the input flange is in sealing connection with the shell. The shell structure of the worm and gear speed reducer is more reasonable, the integration degree is obviously increased compared with the previous technology, and the worm and gear speed reducer has strong sealing performance, and the technical problem of oil leakage of the shell in the previous technology is completely solved. However, because the installation position of the low-speed shaft is low, the high-speed shaft is located above the low-speed shaft, if too much oil liquid causes the low-speed shaft to be soaked in the oil liquid, a large amount of oil liquid is not continuously disturbed in the rotating process, and transmission loss is large, and if too little oil liquid causes the high-speed shaft to be unable to directly contact the oil liquid below, the temperature rising speed is high. In view of this, a reduction gearbox assembly is provided. SUMMARY

[0004] The technical problem to be solved by the application is to overcome the defects of the prior art, and to provide a reduction gearbox assembly.

[0005] The technical scheme adopted to solve the above technical problem is:

[0006] A reduction gearbox assembly comprises:

[0007] A high-speed shaft and a low-speed shaft are arranged at a ninety-degree angle, a bevel gear is arranged in the middle of the low-speed shaft, and a helical tooth groove that is engaged with the bevel gear is arranged on the circumferential outer wall of the high-speed shaft.

[0008] A bottom cover is arranged vertically below the high-speed shaft, a bushing is coaxially arranged at the bottom end of the high-speed shaft, and a pressing piece is arranged in the middle of the bottom cover.

[0009] A conveying shell is provided with a wide hole near the bushing, a vane is arranged on the circumferential outer wall of the bushing, a narrow hole that is in communication with the wide hole is arranged in the conveying shell, and a horizontal hole is arranged on the side of the conveying shell that faces the high-speed shaft.

[0010] A shell is provided with a cavity, the high-speed shaft and the low-speed shaft are arranged in the cavity, and lubricating oil is contained in the cavity;

[0011] In order to ensure transmission accuracy, the top pressing piece presses the spiral top surface of the spiral tooth groove and the bevel gear through the upper top bushing, so as to avoid transmission play caused by loose gear combination. In order to ensure long-time temperature control, the rotation of the bushing can input lubricating oil into the narrow hole through the wide hole and spray it to the high-speed shaft through the transverse hole. The circulating cooling is carried out by using less lubricating oil, and the power loss caused by excessive oil is avoided.

[0012] Further, the conveying shell is provided with a ring cover corresponding to the position of the bushing, the free end of the blade is close to the inner wall of the ring cover, and the conveying shell is provided with a containing cavity corresponding to the lower end of the ring cover.

[0013] Through the above technical scheme, in order to ensure smooth oil conveying, the ring cover on the outside of the bushing can play a guiding role, so that the oil contacting the blade can be stably pushed downward, and the oil entering the containing cavity can be smoothly conveyed into the conveying shell through the wide hole while the oil continuously enters from above, so as to complete stable oil conveying.

[0014] Further, the conveying shell is provided with a plurality of groups of transverse holes arranged equidistantly along the high-speed shaft, the top shell is installed at the opening position of the top end of the conveying shell, the high-speed shaft penetrates through the top shell, and the top shell is provided with a diameter expansion hole corresponding to the high-speed shaft.

[0015] Through the above technical scheme, in order to realize sufficient cooling by using a small amount of lubricating oil, the oil entering the wide hole is reduced in diameter and increased in pressure at the narrow hole position, the high-pressure oil in the narrow hole is again increased in pressure when passing through the small transverse hole, and is sprayed at a high speed on the entire spiral top surface of the high-speed shaft, so as to accurately cool the position of the extruded and contacted bevel gear. The oil not sprayed from the transverse hole enters the top shell upward, and then flows downward along the high-speed shaft through the diameter expansion hole from top to bottom. With the rotation of the high-speed shaft, the oil on the surface of the high-speed shaft is separated from the high-speed shaft under the action of centrifugal force, so as to quickly take away the heat. The high-speed shaft does not have to be soaked in lubricating oil all the time, so as to realize efficient cooling. The lubricating oil does not continuously generate large resistance to the high-speed rotation of the high-speed shaft.

[0016] Further, the top surface of the bottom cover is provided with support blocks arranged in an annular array, the vertical outer wall of the lower part of the bushing is in sliding contact with the support blocks, the top surface of the top pressing piece is in contact with the bottom surface of the bushing at the support blocks, and oil gaps are left between the support blocks.

[0017] By the above technical scheme, in order to ensure stable rotation of the bushing when moving along the height direction, the arc-shaped inner wall of the support block contacts the circumferential outer wall of the bushing to limit the center position when the bushing and the high-speed shaft press the bevel gear, so that the bushing can rotate in the center position stably, and the oil flowing through the accommodating cavity also flows through the contact surface between the pressing piece and the bushing, so that the pressing piece always presses the bushing, and the heat dissipation and cooling between the pressing piece and the bushing are ensured, and high-temperature burning is avoided.

[0018] Further, the accommodating cavity is provided with a filter cover, the edge of the filter cover is upwardly curved, and the middle of the bottom surface of the filter cover is in contact with the top surface of the support block.

[0019] By the above technical scheme, in order to fully utilize the circulating flow of lubricating oil, after contacting the high-speed shaft and the low-speed shaft, the lubricating oil flows to the bottom of the shell and is pushed into the accommodating cavity by the blade, the lubricating oil flows from top to bottom through the filter cover, the metal impurities are intercepted at the position of the filter cover, and the clean oil is sprayed on the surface of the high-speed shaft again to clean and cool, so that the cleanliness of the contact surface is ensured to avoid abnormal wear, and the filter cover can be directly pulled out by pulling down the bottom cover, so that the maintenance and oil replacement are fast.

[0020] Further, the top surface of the pressing piece is provided with a positioning groove, the bottom surface of the bushing is provided with a top bead groove, and a top bead is embedded between the positioning groove and the top bead groove.

[0021] By the above technical scheme, in order to reduce the friction loss caused by the upward pushing of the pressing piece on the high-speed shaft, the design of the top bead optimizes the contact mode of the pressing piece and the bushing to rolling contact, reduces the temperature rise caused by friction, and the top bead can lift the pressing piece and the bushing by a distance, so that the oil can directly flow from the contact position of the pressing piece and the bushing, and the temperature stability of the pressing piece and the bushing is more efficiently ensured.

[0022] Further, a threaded rod is rotatably installed at the lower part of the pressing piece, a pressure sensor is installed between the threaded rod and the pressing piece, and a threaded hole matched with the threaded rod is formed in the middle of the bottom cover.

[0023] By the above technical scheme, in order to ensure the accuracy of the contact pressure between the high-speed shaft and the low-speed shaft, when the high-speed shaft is pushed upward by the pressing piece, only the threaded rod needs to be rotated, the threaded rod goes up in the threaded hole, and the high-speed shaft can be squeezed to press the bevel gear, at this time, the pressure sensor detects the pressure and transmits it outward, so that the operator can intuitively know the pressure value between the high-speed shaft and the low-speed shaft, the initial contact pressure is accurately provided in the debugging stage, and the pressure sensor transmits real-time pressure data at regular time intervals in the use process and the maintenance process, so that abnormalities can be found in time and maintained, and stable work is ensured.

[0024] Further, a vertical rod is mounted at the bottom edge of the top pressing piece, a convex ring is arranged on the circumferential outer wall of the vertical rod, a through hole is arranged on the vertical rod corresponding to the convex ring, and a locking piece is mounted below the vertical rod.

[0025] Through the above technical solution, in order to avoid the transmission accuracy instability caused by the high-speed shaft movement, after the position of the top pressing piece is adjusted to the appropriate initial position through the threaded rod, the position of the top pressing piece is locked by the locking piece, at this time, the high-speed shaft will not move along the axial direction, and the stress of the pressure sensor can also be shared, so as to ensure the long-term stable use of the pressure sensor, when the maintenance is carried out, the locking piece is disassembled, at this time, the stress of the top pressing piece is transmitted to the pressure sensor, so that the pressure size can be displayed.

[0026] Further, the locking piece comprises an inner pressure sleeve and an outer pressure sleeve, the inner pressure sleeve is fixed at the lower end of the through hole, an opening is arranged on the lower part of the inner pressure sleeve along the height direction, a tapered hole is arranged on the lower part of the outer pressure sleeve and is in extrusion contact with the lower end of the inner pressure sleeve, a threaded groove is arranged on the upper part of the outer side of the inner pressure sleeve, and a thread is arranged on the inner side of the upper part of the outer pressure sleeve and is matched with the inner pressure sleeve.

[0027] Through the above technical solution, a specific configuration of the locking piece is disclosed, the outer pressure sleeve is screwed on the lower part of the outer side of the inner pressure sleeve, when the outer pressure sleeve is rotated, the outer pressure sleeve moves upward along the outer wall of the inner pressure sleeve, at this time, the inner wall of the tapered hole extrudes the lower part of the outer pressure sleeve, because of the opening of the lower part of the outer pressure sleeve, the lower part of the outer pressure sleeve is deformed and gathered to the center position when it is pressed, so that the outer wall of the vertical rod can be pressed tightly by the inner pressure sleeve, because the inner pressure sleeve and the bottom cover are fixedly connected, the quick fixing of the vertical rod and the bottom cover can be completed through the locking piece.

[0028] Further, the top of the shell is provided with a flange plate, the flange plate is rotatably connected with the upper half of the high-speed shaft through a bearing, the conveying shell is provided with a positioning seat at the lower half of the high-speed shaft, and the positioning seat is rotatably connected with the high-speed shaft through a bearing.

[0029] Through the above technical solution, in order to ensure the radial stability of the high-speed shaft, the top and bottom ends of the high-speed shaft are centrally limited, in use, the flange plate and the driving device outside are fixed through bolts, the driving device is connected with the top end of the high-speed shaft through a shaft coupling, so that the high-speed shaft can stably receive the rotary driving force.

[0030] The beneficial effects of the present application are as follows:

[0031] (1) Through the arrangement of the high-speed shaft, the low-speed shaft, the bottom cover, the conveying shell and the shell, the top pressing piece mounted on the bottom cover pushes up the bushing, the bushing can avoid the direct extrusion of the high-speed shaft bottom surface by the top pressing piece to generate wear, the vertically installed high-speed shaft is pushed upward, the helical top surface of the helical tooth groove directly extrudes and contacts the bevel gear, the assembly gap of the meshing position is eliminated, the transmission play caused by the loose gear combination is avoided, and the transmission accuracy is improved.

[0032] (2) The application reduces the use of lubricating oil, avoids the high-speed shaft and the low-speed shaft being always soaked in the lubricating oil, reduces the invalid disturbance to the lubricating oil, utilizes the rotation pushing of the bushing and the blade, reduces the transmission loss caused by the oil liquid resistance, makes the small amount of oil liquid circulate under the guidance of the conveying shell, fully utilizes the flow of the small amount of oil liquid to spray lubrication and cooling for the high-speed shaft and the low-speed shaft, and guarantees the temperature stability of the contact surface. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is the first perspective structural view of the application;

[0034] Figure 2 is the second perspective structural view of the application;

[0035] Figure 3 is the structural schematic view of the shell in the cut state;

[0036] Figure 4 is the position schematic view of the shell in the cut state;

[0037] Figure 5 is the split schematic view of the high-speed shaft, the bottom cover, the bushing, the filter cover, the top pressing piece and the conveying shell;

[0038] Figure 6 is the position schematic view of the high-speed shaft, the low-speed shaft, the conveying shell and the bushing;

[0039] Figure 7 is the structural schematic view of the high-speed shaft, the low-speed shaft, the conveying shell and the bushing;

[0040] Figure 8 is Figure 7 is the enlarged schematic view of a in the figure;

[0041] Figure 9 is the cut schematic view of the bushing, the bottom cover, the top pressing piece and the filter cover;

[0042] Figure 10 is the split schematic view of the bushing, the bottom cover, the top pressing piece and the filter cover;

[0043] Figure 11 is the split schematic view of the top pressing piece.

[0044] Reference numerals: 1. Outer shell; 11. Flange; 12. Cavity; 13. Liquid level; 14. Receptacle; 2. High-speed shaft; 21. Spiral top surface; 22. Slot; 3. Low-speed shaft; 31. Helical gear; 4. Bottom cover; 41. Threaded hole; 42. Through hole; 5. Conveying shell; 51. Horizontal hole; 52. Ring cover; 53. Narrow hole; 54. Positioning seat; 55. Wide hole; 6. Top shell; 61. Expanded diameter hole; 7. Bushing; 71. Blade; 72. Locking block; 73. Top ball groove; 8. Filter cover; 9. Top pressure component; 91. Top ball; 92. Threaded rod; 93. Pressure sensor; 94. Vertical rod; 941. Convex ring; 95. Inner pressure sleeve; 951. Notch; 96. Outer pressure sleeve; 961. Tapered hole; 97. Positioning groove. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0046] Example 1:

[0047] like Figure 1 - Figure 11 As shown, this embodiment provides a gearbox assembly, which provides a specific configuration to solve the problems of insufficient transmission accuracy and driving force loss caused by lubrication oil:

[0048] One high-speed shaft 2 and one low-speed shaft 3, refer to Figure 3 The high-speed shaft 2 is arranged vertically, and the low-speed shaft 3 is arranged horizontally. The high-speed shaft 2 and the low-speed shaft 3 are staggered to the left and right to leave sufficient clearance for the meshing parts. The meshing parts are helical gear 31 and helical tooth groove. The low-speed shaft 3 and helical gear 31 are fixed coaxially. The outer circumference of the high-speed shaft 2 is provided with helical tooth groove that meshes with the helical gear 31. The high-speed shaft 2 is the driving shaft. It drives the helical gear 31 to rotate through the helical tooth groove to reduce the speed, thereby driving the low-speed shaft 3 to rotate at a low speed, thus realizing the basic function of speed reduction and torque increase.

[0049] A shell 1, refer to Figure 4 The outer casing 1 has a cavity 12 inside, in which the high-speed shaft 2 and the low-speed shaft 3 are placed to complete the sealing protection. The cavity 12 contains lubricating oil, and the level 13 of the lubricating oil is lower than the bottom surface of the helical gear 31, so it will not be continuously disturbed by the rotation of the high-speed shaft 2 and the low-speed shaft 3.

[0050] One bottom cover 4, refer to Figure 5 and Figure 6The bottom cover 4 is located directly below the vertical high-speed shaft 2, and is detachably installed at the bottom of the shell 1 by bolts, so that an opening is formed at the bottom of the shell 1 for the installation and oil change maintenance of the high-speed shaft 2. Meanwhile, the bottom end of the high-speed shaft 2 is coaxially sleeved with a bushing 7, the bottom end of the high-speed shaft 2 is provided with a clamping groove 22, and the bottom surface of the blind hole of the bushing 7 is provided with a clamping block 72 for coaxial rotation. A top pressing piece 9 is installed through the middle of the bottom cover 4, and the top pressing piece 9 can move up and down relative to the bottom cover 4, so that the high-speed shaft 2 can be pushed up through the bushing 7. The bushing 7 rotates relative to the top pressing piece 9, and the top pressing piece 9 will not directly wear the high-speed shaft 2;

[0051] A conveying shell 5 is arranged vertically along the left side wall of the shell 1, Figure 4 and Figure 8 The conveying shell 5 is in the shape of a hollow strip and is arranged vertically along the left side wall of the shell 1. The bottom of the conveying shell 5 is provided with a wide hole 55 near the bushing 7. The conveying shell 5 is provided with a narrow hole 53 in communication with the wide hole 55. The inner diameter of the narrow hole 53 is smaller than the size of the wide hole 55. The circumferential outer wall of the bushing 7 is provided with a blade 71. When the bushing 7 rotates, the blade 71 pushes the oil downward into the wide hole 55, and then the oil is pushed upward along the narrow hole 53 under the action of oil pressure. The side of the conveying shell 5 opposite to the high-speed shaft 2 is provided with a horizontal hole 51. The oil in the narrow hole 53 is sprayed horizontally from the horizontal hole 51 to spray and cool the high-speed shaft 2;

[0052] The working principle of the embodiment is as follows:

[0053] In order to ensure the transmission accuracy, during the assembly stage, the top pressing piece 9 pushes the high-speed shaft 2 upward by extruding the bushing 7, so that the helical top surface 21 of the helical tooth groove is pressed against the bevel gear 31. At this time, the assembly gap between the helical top surface 21 and the bevel gear 31 can be eliminated. During the use stage, the rotation of the high-speed shaft 2 can immediately drive the low-speed shaft 3 to rotate, avoiding the transmission play caused by the loose combination of gears, and the transmission accuracy is high.

[0054] In order to ensure the temperature to be controllable for a long time, during the assembly stage, a small amount of lubricating oil is filled into the shell 1 to reduce production cost. During the use stage, the lubricating oil will not flood the bevel gear 31 and the helical tooth groove, avoiding the continuous disturbance of the lubricating oil by the rotation of the high-speed shaft 2 and the low-speed shaft 3. These disturbances will not be effectively utilized, but will only generate invalid resistance to the rotation of the high-speed shaft 2 and the low-speed shaft 3, and will also cause the rapid emulsification of the lubricating oil. Therefore, the design can reduce the resistance of the lubricating oil to the rotation of the high-speed shaft 2 and the low-speed shaft 3, and can also avoid the emulsification of the lubricating oil caused by continuous stirring, thereby ensuring the service life of the lubricating oil;

[0055] At the same time, the bushing 7 rotates, and the blade 71 is inclined to drive the oil to flow downward into the wide hole 55. In a unit of time, only a small amount of oil directly contacting the blade 71 is pushed by the rotating high-speed shaft 2, reducing the power loss of the oil to the high-speed shaft 2. After the lubricating oil enters the narrow hole 53, the flow rate increases due to the reduction of the flow path. The oil flows upward along the conveying shell 5 and is sprayed onto the high-speed shaft 2 through the transverse hole 51, lubricating the high-speed shaft 2 and the low-speed shaft 3. The centrifugal force of the high-speed shaft 2 throws the oil on the surface downward, taking the heat away from the high-speed shaft 2 and the low-speed shaft 3. The falling oil is again collected to contact the blade 71 and is pushed to circulate. The oil is cooled by circulating a small amount of lubricating oil. The heat of the oil is dissipated outward through the outer shell 1. While ensuring that the oil does not overflow, stable heat dissipation is achieved.

[0056] Example two:

[0057] On the basis of example one, in order to ensure smooth oil delivery, referring to Figure 4 and Figure 6 , the conveying shell 5 is provided with a ring cover 52 corresponding to the position of the bushing 7. The free end of the blade 71 is close to the inner wall of the ring cover 52. The ring cover 52 on the outside of the bushing 7 can play a guiding role, so that the oil contacting the blade 71 can be stably pushed downward. The outer shell 1 is provided with a containing cavity 14 corresponding to the lower end of the ring cover 52. The containing cavity 14 is in communication with the wide hole 55. The oil entering the containing cavity 14 will be smoothly introduced into the conveying shell 5 through the wide hole 55 while the oil above continuously enters, completing stable oil delivery.

[0058] At the same time, in order to achieve sufficient cooling of the high-speed shaft 2 and the low-speed shaft 3 with a small amount of lubricating oil, referring to Figure 5 and Figure 7 , the conveying shell 5 is provided with multiple groups of transverse holes 51 radially equidistant along the high-speed shaft 2, which can cover the entire helical tooth groove of the high-speed shaft 2. Specifically, the oil entering the wide hole 55 is reduced in diameter and increased in pressure at the position of the narrow hole 53. The high-pressure oil in the narrow hole 53 is again pressurized when passing through the small transverse hole 51, and is sprayed at a high speed onto the entire helical top surface 21 of the high-speed shaft 2, precisely cooling the position of the extruded contact helical gear 31. It should be noted that in order to fully utilize the oil pushed upward, the top shell 6 is installed at the opening position of the top end of the conveying shell 5. The oil not sprayed from the transverse hole 51 flows upward into the top shell 6. The high-speed shaft 2 penetrates the top shell 6. The top shell 6 is provided with an expansion hole 61 at the bottom surface corresponding to the high-speed shaft 2. The excess oil will flow downward along the high-speed shaft 2 through the expansion hole 61 from top to bottom, and the upper half of the high-speed shaft 2 far from the oil will be targeted for supplementary cooling. As the high-speed shaft 2 rotates, the oil on the surface of the high-speed shaft 2 is thrown off under the action of centrifugal force, quickly taking the heat away. The high-speed shaft 2 does not have to be immersed in lubricating oil all the time, and efficient cooling is achieved.

[0059] Example three:

[0060] In order to ensure the stable rotation of the bushing 7 when moving in the height direction, referring to Figure 5 and Figure 6 , the top surface of the bottom cover 4 is provided with support blocks arranged in an annular array, a circular space is formed between the support blocks, the lower end of the bushing 7 is inserted into the circular space, and the vertical outer wall of the lower part of the bushing 7 is in sliding contact with the support blocks. When the bushing 7 and the high-speed shaft 2 are pressed tightly, the arc-shaped inner wall of the support block will contact the circumferential outer wall of the bushing 7 to limit the center, ensuring that the bushing 7 can rotate stably in the center.

[0061] At the same time, the top surface of the top pressing piece 9 and the bottom surface of the bushing 7 are in contact at the support blocks, and an oil passing gap is left between the support blocks. The oil flowing through the position of the containing cavity 14 will also flow through the contact surface between the top pressing piece 9 and the bushing 7 through the oil passing gap. At the same time, the top pressing piece 9 is always pressed against the bushing 7, ensuring that the top pressing piece 9 and the bushing 7 are cooled to prevent high temperature from burning.

[0062] It can be predicted that metal debris will inevitably be produced due to contact friction during operation. In order to fully utilize the circulating lubricating oil, a filter cover 8 is arranged in the containing cavity 14. After contacting the high-speed shaft 2 and the low-speed shaft 3, the lubricating oil flows to the bottom of the housing 1 and is pushed into the containing cavity 14 by the blade 71. These lubricating oils will pass through the filter cover 8 from top to bottom, and the metal impurities will be intercepted at the position of the filter cover 8. Only the clean oil will be sprayed onto the surface of the high-speed shaft 2 again to clean and cool at the same time, ensuring the cleanliness of the contact surface and avoiding abnormal wear. The middle part of the filter cover 8 is provided with a hole for the bushing 7 to pass through, the edge of the filter cover 8 is upwardly curved to form a bowl-shaped structure, which can stably gather more metal impurities and prolong the maintenance period. In addition, the top of the filter cover 8 is in extrusion contact with the bottom surface of the ring cover 52, and the bottom surface of the filter cover 8 is in contact with the top surface of the support block. The position is stable during use. When maintaining, the bottom cover 4 is removed, and the bushing 7 and the filter cover 8 can be directly pulled out downward, which is convenient for maintenance.

[0063] In order to reduce the friction loss generated by the top pressing piece 9 pushing the high-speed shaft 2 and reduce the metal debris generated by sliding friction, referring to Figure 10 and Figure 11 , the top surface of the top pressing piece 9 is provided with a positioning groove 97, the bottom surface of the bushing 7 is provided with a top bead groove 73, and a top bead 91 is embedded between the positioning groove 97 and the top bead groove 73. The design of the top bead 91 optimizes the contact mode between the top pressing piece 9 and the bushing 7 to rolling contact, reduces the temperature rise caused by friction, and the ball can lift the top pressing piece 9 and the bushing 7 by a distance, so that the oil can directly flow from the contact position between the top pressing piece 9 and the bushing 7, and more efficiently ensure the temperature stability of the top pressing piece 9 and the bushing 7.

[0064] Example Four:

[0065] On the basis of embodiment one, in order to ensure the accuracy of the contact pressure between the high-speed shaft 2 and the low-speed shaft 3, referring to Figure 8 、 Figure 9 and Figure 10 , the lower part of the top pressing piece 9 is rotatably installed with a threaded rod 92, and the middle part of the bottom cover 4 is provided with a threaded hole 41 matched with the threaded rod 92. When the high-speed shaft 2 is pushed up by the top pressing piece 9, only the threaded rod 92 needs to be rotated, and the threaded rod 92 goes up in the threaded hole 41, so as to extrude the high-speed shaft 2 to press the bevel gear 31. Among them, the pressure sensor 93 is installed between the threaded rod 92 and the top pressing piece 9, which can detect the pressure and transmit it outward. At this time, the operator can intuitively know the pressure value between the high-speed shaft 2 and the low-speed shaft 3, so as to ensure the accurate initial contact pressure in the debugging stage. In the use process and the maintenance process, the pressure sensor 93 uploads real-time pressure data regularly, discovers abnormalities in time and maintains, and ensures stable work;

[0066] In order to avoid the transmission accuracy instability caused by the high-speed shaft 2 running, referring to Figure 9 and Figure 10 , the vertical rod 94 is installed at the edge of the bottom of the top pressing piece 9, the circumferential outer wall of the vertical rod 94 is provided with a convex ring 941, the bottom cover 4 is provided with a through hole 42 corresponding to the vertical rod 94, and the vertical rod 94 is installed below the bottom cover 4. Locking piece, after adjusting the position of the top pressing piece 9 to the appropriate initial position by the threaded rod 92, the position of the top pressing piece 9 is locked by the locking piece. At this time, the high-speed shaft 2 will not run along the axial direction, and the pressure sensor 93 can also share the pressure, so as to ensure the long-term stable use of the pressure sensor 93. When repairing and maintaining, the locking piece is disassembled. At this time, the stress of the top pressing piece 9 is completely transmitted to the pressure sensor 93, so as to display the pressure, which does not affect the normal inspection of the pressing condition;

[0067] Disclose a specific configuration of the locking piece, referring to Figure 11The locking member includes an inner pressure sleeve 95 and an outer pressure sleeve 96. The outer pressure sleeve 96 is screwed on the lower part of the outer side of the inner pressure sleeve 95. A threaded groove is formed on the upper part of the outer side of the inner pressure sleeve 95. A thread is formed on the inner side of the upper part of the outer pressure sleeve 96, which is matched with the inner pressure sleeve 95. When the outer pressure sleeve 96 is rotated, the outer pressure sleeve 96 goes up along the outer wall of the inner pressure sleeve 95. The lower part of the inner pressure sleeve 95 is provided with an opening 951 in the height direction. The lower part of the outer pressure sleeve 96 is provided with a tapered hole 961, which is in extrusion contact with the lower end of the inner pressure sleeve 95. At this time, the inner wall of the tapered hole 961 extrudes the lower part of the outer pressure sleeve 96. Because of the opening 951 in the lower part of the outer pressure sleeve 96, the lower part of the outer pressure sleeve 96 deforms and converges to the center position when it is pressed. Thus, the inner pressure sleeve 95 can press the outer wall of the vertical rod 94. The inner pressure sleeve 95 is fixed at the lower end of the through hole 42. Because the inner pressure sleeve 95 is fixedly connected with the bottom cover 4, the vertical rod 94 can be quickly fixed with the bottom cover 4 by the locking member. Similarly, the locking member can also use other replaceable structures, such as a sleeve with a transverse through hole fixed on the bottom cover 4. The vertical rod 94 is inserted into the sleeve. A pressing bolt is installed in the through hole. The vertical rod 94 can be fixed in position by rotating the pressing bolt to extrude the outer wall of the vertical rod 94. However, the contact area of this structure is small, and the pressing bolt needs to exert a large pressure on the vertical rod 94. There is a risk of slipping after long-term use. Other replaceable structures for locking the vertical rod 94 are not described here.

[0068] Embodiment five:

[0069] On the basis of the embodiment one, in order to ensure the radial stability of the high-speed shaft 2, the top of the shell 1 is provided with a flange plate 11. The flange plate 11 is rotatably connected with the upper half of the high-speed shaft 2 through a bearing. The conveying shell 5 located at the lower half of the high-speed shaft 2 is provided with a positioning seat 54, which is rotatably connected with the high-speed shaft 2 through a bearing. The top and bottom ends of the high-speed shaft 2 are centrally limited. At the same time, in use, the flange plate 11 and the driving device outside are fixed by bolts. The driving device is connected with the top end of the high-speed shaft 2 through a shaft coupling, so that the high-speed shaft 2 can stably receive the rotary driving force.

[0070] The above is only a preferred embodiment of the present application, and is not intended to limit the protection scope of the present application.

Claims

1. A reduction gearbox assembly characterized by, Include: High-speed shaft (2) and low-speed shaft (3), the high-speed shaft (2) and low-speed shaft (3) are arranged at an angle of ninety degrees, the middle of the low-speed shaft (3) is provided with a helical gear (31), and the outer wall of the high-speed shaft (2) is provided with a helical tooth groove meshing with the helical gear (31); The bottom cover (4) is located below the vertically arranged high-speed shaft (2), the bottom end of the high-speed shaft (2) is coaxially sleeved with a bushing (7), and the middle of the bottom cover (4) is provided with a top pressing piece (9); The conveying shell (5) is provided with a wide hole (55) near the bushing (7), the outer wall of the bushing (7) is provided with a blade (71), the conveying shell (5) is provided with a narrow hole (53) in communication with the wide hole (55), and the conveying shell (5) is provided with a transverse hole (51) opposite to one side of the high-speed shaft (2); The outer shell (1) is provided with a cavity (12), the high-speed shaft (2) and the low-speed shaft (3) are arranged in the cavity (12), and the cavity (12) contains lubricating oil; The conveying shell (5) is provided with a ring cover (52) corresponding to the position of the bushing (7), the free end of the blade (71) is close to the inner wall of the ring cover (52), and the outer shell (1) is provided with a containing cavity (14) corresponding to the lower end of the ring cover (52), the containing cavity (14) is in communication with the wide hole (55); Wherein, the top pressing piece (9) presses the helical top surface (21) of the helical tooth groove and the helical gear (31) through the upper top bushing (7), and the bushing (7) can input the lubricating oil into the narrow hole (53) through the wide hole (55) and spray it to the high-speed shaft (2) through the transverse hole (51).

2. The reduction gearbox assembly of claim 1, wherein, The conveying shell (5) is provided with a plurality of groups of transverse holes (51) arranged equidistantly along the radial direction of the high-speed shaft (2), the top end of the conveying shell (5) is provided with a top shell (6), the high-speed shaft (2) penetrates through the top shell (6), and the bottom surface of the top shell (6) is provided with a diameter expansion hole (61) corresponding to the high-speed shaft (2).

3. The reduction gearbox assembly of claim 2, wherein, The bottom cover (4) is provided with a support block arranged in an annular array on the top surface, the vertical outer wall of the lower part of the bushing (7) is in sliding contact with the support block, the top surface of the top pressing piece (9) is in contact with the bottom surface of the bushing (7) at the support block, and the support blocks are left with an oil passing gap.

4. The reduction gearbox assembly of claim 3, wherein, The containing cavity (14) is provided with a filter cover (8), the edge of the filter cover (8) is upwardly curved, and the bottom surface of the filter cover (8) is in contact with the top surface of the support block.

5. The reduction gearbox assembly of claim 4, wherein, The top surface of the top pressing piece (9) is provided with a positioning groove (97), the bottom surface of the bushing (7) is provided with a top bead groove (73), and the positioning groove (97) and the top bead groove (73) are embedded with a top bead (91).

6. The reduction gearbox assembly of claim 1, wherein, The bottom part of the top pressing piece (9) is rotatably provided with a threaded rod (92), the threaded rod (92) and the top pressing piece (9) are provided with a pressure sensor (93), and the middle of the bottom cover (4) is provided with a threaded hole (41) matched with the threaded rod (92).

7. The reduction gearbox assembly of claim 6, wherein, The top pressing piece (9) is provided with a vertical rod (94) at the bottom edge, the outer wall of the vertical rod (94) is provided with a convex ring (941), the bottom cover (4) is provided with a through hole (42) corresponding to the vertical rod (94), and the vertical rod (94) is provided with a locking piece below the bottom cover (4).

8. The reduction gearbox assembly of claim 7, wherein, The locking piece comprises an inner pressing sleeve (95) and an outer pressing sleeve (96), the inner pressing sleeve (95) is fixed at the lower end of the through hole (42), the lower part of the inner pressing sleeve (95) is provided with an opening (951) in the height direction, the lower part of the outer pressing sleeve (96) is provided with a tapered hole (961) in extrusion contact with the lower end of the inner pressing sleeve (95), the outer side of the upper part of the inner pressing sleeve (95) is provided with a threaded groove, and the inner side of the upper part of the outer pressing sleeve (96) is provided with a thread matched with the inner pressing sleeve (95).

9. The reduction gearbox assembly of claim 1, wherein, The shell (1) is provided with a flange plate (11) at the top, the flange plate (11) is rotationally connected with the upper half of the high-speed shaft (2) through a bearing, the conveying shell (5) is provided with a positioning seat (54) at the lower half of the high-speed shaft (2), and the positioning seat (54) is rotationally connected with the high-speed shaft (2) through a bearing.

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