Speed reducer

Abstract

The utility model relates to a speed reducer which comprises a shell, an input shaft, an output shaft, a linkage structure located between the input shaft and the output shaft and an oil injection assembly, an oil injection hole is formed in the shell, the oil injection assembly is inserted into the oil injection hole and connected with the shell, and the input shaft and the output shaft are rotationally installed on the left side and the right side of the shell respectively. The outer sleeve is inserted into the oil injection hole and detachably connected with the shell, the outer wall of the inner sleeve is attached to the inner wall of the outer sleeve, a cotton core and a rotating part used for extruding the cotton core are installed in the inner sleeve, a first communicating hole is formed in the position, located on the left side of the cotton core, of the inner sleeve, and a second communicating hole communicating with the first communicating hole is formed in the outer sleeve; insertion holes corresponding to the bolts are formed in the inner sleeve, and screw holes corresponding to the insertion holes are formed in the outer sleeve. By the adoption of the scheme, the cotton core can be extruded and lubricating oil flows out only when the first communicating hole and the second communicating hole are opposite through rotation, and the possibility of mistaken touch is reduced.

Description

Technical Field

[0001] This utility model relates to a speed reducer. Background Technology

[0002] As a commonly used power transmission device, speed reducers are widely used in various mechanical equipment. Their main function is to convert the high-speed rotation of the motor into low-speed, high-torque output through a gear reduction mechanism to meet the needs of different working conditions. In stage machinery, theater equipment, conference centers and other places, speed reducers are usually used as drive devices for curtain systems to control the smooth opening and closing of the curtain.

[0003] During long-term operation, gear wear and uneven lubrication are common problems. Traditional speed reducers are often maintained by oil bath lubrication or periodic manual oiling. The former is prone to uneven distribution or leakage of lubricating oil, while the latter increases the cost of manual maintenance and is inconvenient to operate in high-altitude or concealed installation environments, affecting the reliability and service life of the equipment. Chinese Patent No.: CN202222013865.4 A new type of speed reducer is equipped with an oil injection component to achieve temporary lubrication. However, unauthorized personnel may arbitrarily rotate the rotating parts and apply force to the cotton core to make the lubricating oil flow into the housing.

[0004] Therefore, how to achieve temporary lubrication while reducing the leakage of lubricating oil from the cotton wick due to misoperation has become an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a speed reducer that can squeeze the cotton core and allow the lubricating oil to flow out by rotating the first connecting hole to face the second connecting hole, thereby reducing the possibility of accidental contact.

[0006] To achieve the above objectives, this utility model provides the following technical solution: It includes a housing, an input shaft, an output shaft, a linkage structure located between the input shaft and the output shaft, and an oiling assembly. The housing is provided with an oiling hole. The oiling assembly is inserted into the oiling hole and connected to the housing. The input shaft and the output shaft are rotatably mounted on the left and right sides of the housing, respectively. It also includes two bolts. The oiling assembly includes an outer sleeve with an oiling hole inserted and detachably connected to the housing, and an inner sleeve whose outer wall fits against the inner wall of the outer sleeve. A cotton core and a rotating component for squeezing the cotton core are installed inside the inner sleeve. A first connecting hole is provided on the left side of the cotton core in the inner sleeve, and a second connecting hole is provided on the outer sleeve that communicates with the first connecting hole. Insertion holes are provided on the inner sleeve corresponding to each bolt, and screw holes are provided on the outer sleeve corresponding to each insertion hole.

[0007] The present invention is further configured such that: the rotating part is provided with an external thread in the circumferential direction, and the inner sleeve is provided with a threaded hole.

[0008] The present invention is further configured to include a sealing ring located between the rotating component and the inner sleeve.

[0009] The present invention is further configured to include a sealing element, wherein the rotating element is provided with an oil injection channel above the first connecting hole, and the sealing element is inserted into the oil injection channel and is detachably connected to the inner sleeve.

[0010] The present invention is further configured such that: the sealing element includes a sealing disc, the sealing disc is provided with a plurality of positioning blocks protruding therefrom, the inner sleeve is provided with a positioning slot corresponding to each positioning block, each positioning block includes a positioning post and a positioning hemisphere, the diameter of each positioning hemisphere is larger than the corresponding positioning post, the positioning post is provided with a groove in the circumferential direction, and the inner sleeve is provided with a protrusion that cooperates with the slot in each positioning slot.

[0011] The present invention is further configured to include a mating ring made of rubber, the outer sleeve includes a connecting section and an insertion section, the connecting section is bolted to the housing, the mating ring is fitted with the insertion section, the housing is provided with a mating groove adapted to the shape of the mating ring, the mating ring includes a first mating section and a second mating section, the diameter of the second mating section is larger than that of the first mating section, and the housing is provided with an abutting block located circumferentially to the first mating section within the mating groove.

[0012] The present invention is further configured such that: the oil injection assembly also includes a fitting component for inserting a cotton core and a reset spring, wherein the reset spring is fitted onto the fitting component and one end is fixed to the inner sleeve, and the other end is fixed to the fitting component.

[0013] By adopting the above technical solution, since bolts are installed between the outer sleeve and the inner sleeve, after unscrewing the bolts, the inner sleeve can rotate within the outer sleeve, thereby connecting or disengaging the first and second connecting holes. After reinstalling the bolts for fixation, the inner sleeve cannot rotate within the outer sleeve without external force. Because the cotton core can absorb lubricating oil, during the process of injecting lubricating oil into the housing through the oil injection component to lubricate the linkage component, some lubricating oil will seep into the cotton core. When temporary lubricating oil replenishment is needed, with the first and second connecting holes aligned, rotating the rotating component can squeeze the cotton core, causing the adhering lubricating oil inside to be squeezed out and guided to the gear surface of the linkage module, such as the output shaft, for lubrication. When it is necessary to avoid the risk of accidental contact, rotation can be used to connect the first connecting hole of the inner sleeve with the second connecting hole of the outer sleeve. By offsetting the two connecting holes and then inserting the bolts, the two parts are fixed together. At this point, force is applied to the rotating parts, preventing the lubricating oil in the cotton core from entering the second connecting hole and thus the interior of the housing and the surface of the linkage component. Therefore, the squeezed-out lubricating oil remains in the inner sleeve and does not flow into the housing. Consequently, when no temporary lubrication is needed, unauthorized personnel cannot access the lubrication component to inject oil into the housing, preventing the situation where the lubricating oil in the cotton core is squeezed into the housing when no lubrication is needed. In summary, by adjusting the position of the insertion holes and screw holes of the two bolts, the position of the inner sleeve inside the outer sleeve can be changed, thereby adjusting the relative relationship between the first and second connecting holes and thus regulating whether the lubricating oil can flow into the housing. By controlling the oil supply, it can be ensured that key components are always in optimal lubrication condition, thereby reducing friction loss, improving transmission efficiency, reducing energy consumption, and improving the overall practical performance of the reducer. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is an assembly drawing illustrating a specific embodiment of the present utility model;

[0016] Figure 2 A 3D view of the oil injection assembly;

[0017] Figure 3 for Figure 1 Enlarged view of A in the middle;

[0018] Figure 4 for Figure 1 Enlarged view of B in the middle;

[0019] Figure 5 for Figure 1 Enlarged view of C in the middle;

[0020] Figure 6 for Figure 1 Enlarged view of D;

[0021] Figure 7 for Figure 1 A magnified view of E in the middle.

[0022] In the diagram: 1-housing, 11-oil inlet, 12-mating groove, 121-contact block;

[0023] 2-Output shaft;

[0024] 3-Linkage structure;

[0025] 4-Oil injection assembly, 41-Inner sleeve, 411-Cotton core, 412-Rotating component, 4121-External thread, 4122-Oil injection channel, 413-First connecting hole, 414-Insertion hole, 415-Threaded hole, 416-Positioning slot, 417-Protrusion, 42-Outer sleeve, 421-Second connecting hole, 422-Threaded hole, 423-Connecting section, 424-Insertion section, 43-Return spring, 44-Matching component;

[0026] 5-Sealing ring;

[0027] 6-Seal, 61-Sealing disc;

[0028] 7-Positioning insert, 71-Positioning post, 711-Groove, 72-Positioning hemisphere;

[0029] 8-Matching ring, 81-First mating segment, 82-Second mating segment. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] like Figures 1-7As shown, this utility model discloses a speed reducer, including a housing 1, an input shaft, an output shaft 2, a linkage structure 3 located between the input shaft and the output shaft 2, and an oil injection assembly 4. The housing 1 is provided with an oil injection hole 11, and the oil injection assembly 4 is inserted into the oil injection hole 11 and connected to the housing 1. The input shaft and output shaft 2 are rotatably mounted on the left and right sides of the housing 1, respectively. After fixing the output shaft 2 of the motor (not shown in the figure) to the input shaft of the speed reducer (not shown in the figure), the input shaft inside the housing 1 transmits torque to the linkage structure 3. The linkage structure 3 is typically composed of multiple gears, with the small gear transmitting torque to the large gear to achieve speed reduction (this is prior art and will not be specifically described here). It also includes two bolts (not shown in the figure). The oil injection assembly 4 includes an outer sleeve 42 detachably connected to the housing 1 by inserting an oil injection hole 11, and an inner sleeve 41 whose outer wall is fitted against the inner wall of the outer sleeve 42. A cotton core 411 and a rotating component 412 for squeezing the cotton core 411 are installed inside the inner sleeve 41. A first connecting hole 413 is provided on the left side of the cotton core 411, and a second connecting hole 421 communicating with the first connecting hole 413 is provided on the outer sleeve 42. Insertion holes 414 are provided on the inner sleeve 41 corresponding to each bolt, and screw holes 422 are provided on the outer sleeve 42 corresponding to each insertion hole 414. Because bolts are provided between the outer sleeve 42 and the inner sleeve 41, the inner sleeve 41 can rotate within the outer sleeve 42 after the bolts are unscrewed. This allows the first connecting hole 413 and the second connecting hole 421 to be connected or misaligned. After fixing with bolts, the inner sleeve 41 cannot rotate within the outer sleeve 42 without external force. Since the cotton core 411 can absorb lubricating oil, during the process of injecting lubricating oil into the housing 1 through the oil injection component 4 to lubricate the linkage component, some lubricating oil will seep into the cotton core 411. When temporary lubricating oil needs to be added, with the first connecting hole 413 and the second connecting hole 421 aligned, rotating the rotating component 412 will squeeze the cotton core 411, causing the lubricating oil adhering to the cotton core 411 to be squeezed out into the housing 1 and guided to the linkage module such as the output shaft 2. Lubrication is achieved through the toothed surface. When it is necessary to avoid the risk of accidental contact, the first connecting hole 413 of the inner sleeve 41 and the second connecting hole 421 of the outer sleeve 42 are misaligned by rotation, and then the bolts are installed to fix them. At this time, force is applied to the rotating part, preventing the lubricating oil in the cotton core 411 from entering the second connecting hole 421 and thus the interior of the housing 1 and the surface of the linkage component. Therefore, the squeezed-out lubricating oil remains in the inner sleeve 41 and does not flow into the housing 1. This prevents unauthorized personnel from contacting the oiling component 4 when no temporary lubrication is needed, thus preventing them from injecting oil into the interior of the housing 1. In summary, the situation where the lubricating oil in the cotton core 411 is squeezed into the housing 1 when no oiling is needed will not occur.By adjusting the positions of the insertion holes 414 and threaded holes 422 into which the two bolts are inserted, the position of the inner sleeve 41 within the outer sleeve 42 can be changed, thereby adjusting the relative relationship between the first connecting hole 413 and the second connecting hole 421. This allows for the regulation of lubricating oil flow into the housing 1. By controlling the oil supply, it is ensured that key components are always in optimal lubrication condition, thereby reducing friction loss, improving transmission efficiency, reducing energy consumption, and ultimately improving the overall practical performance of the reducer.

[0032] The rotating component 412 is provided with an external thread 4121 in the circumference, and the inner sleeve 41 is provided with a threaded hole 415. The use of threaded connection makes the relative movement between the rotating component 412 and the inner sleeve 41 more stable and reliable, which facilitates precise adjustment of the squeezing degree of the cotton core 411, thereby more accurately controlling the supply of lubricating oil.

[0033] Preferably, it also includes a sealing ring 5 located between the rotating member 412 and the inner sleeve 41. The design of the sealing ring 5 reduces the possibility of lubricating oil leakage during the process of applying torque to the rotating member 412 and squeezing the cotton core 411 to make the lubricating oil flow out, ensuring that the lubricating oil can only flow along a predetermined path, and enhancing the sealing performance between the rotating member 412 and the inner sleeve 41.

[0034] The system also includes a sealing element 6. The rotating element 412 is provided with an oil injection channel 4122 above the first connecting hole 413. The sealing element 6 is inserted into the oil injection channel 4122 and is detachably connected to the inner sleeve 41. Since the rotating element 412 is provided with the oil injection channel 4122 and the oil injection channel 4122 is connected to the first connecting hole 413 on the first sleeve, in addition to removing the outer sleeve 42 from the housing 1 to allow lubricating oil to be injected through the oil injection hole 11, the sealing element 6 can also be removed from the rotating element 412 to allow lubricating oil to flow into the oil injection channel 4122 and enter the housing 1 and the linkage assembly through the first connecting hole 413 and the second connecting hole 421.

[0035] The sealing element 6 includes a sealing disc 61 made of rubber, on which several positioning blocks 7 are protruding. The inner sleeve 41 is provided with positioning slots 416 corresponding to each positioning block 7. Each positioning block 7 includes a positioning post 71 and a positioning hemisphere 72. The diameter of each positioning hemisphere 72 is larger than that of the corresponding positioning post 71. The positioning post 71 has a circumferentially arranged groove 711. The inner sleeve 41 has protrusions 417 that mate with the slots within each positioning slot 416. When the sealing element 6 is installed onto the rotating element 412 to close the oil injection channel 4122, the positioning blocks 7 on the sealing disc 61 first have their positioning hemispheres 72 entering their corresponding positioning slots. Position 416 is the location for inserting the positioning post 71. Therefore, each positioning hemisphere 72 needs to force its way past this position so that the positioning post 71 falls into this position. At this time, the positioning post 71 needs to pass over the corresponding protrusion 417 so that each protrusion 417 and the corresponding groove 711 can cooperate, so that each positioning insert 7 and the corresponding positioning slot 416 can cooperate. At this time, the lubricating oil in the oil injection channel 4122 cannot flow out through the seal 6. When oil needs to be injected through the oil injection channel 4122, the protrusion 417 on each positioning post 71 is separated from the groove 711 by applying force to the positioning plate, so that the positioning hemisphere 72 passes over the position for inserting the positioning post 71 and thus separates the sealing plate 61 from the inner sleeve 41.

[0036] This includes a rubber-made mating ring 8. The outer sleeve 42 includes a connecting section 423 and an insertion section 424. The connecting section 423 is bolted to the housing 1. The mating ring 8 is fitted with the insertion section 424. The housing 1 is provided with a mating groove 12 that matches the shape of the mating ring 8. The mating ring 8 includes a first mating section 81 and a second mating section 82. The diameter of the second mating section 82 is larger than that of the first mating section 81. The housing 1 is provided with an abutment block 121 located circumferentially to the first mating section 81 within the mating groove 12. The mating ring 8 is located between the outer sleeve 42 and the housing 1. The mating ring 8 between the outer sleeve 42 and the housing 1 can achieve a seal. Since the diameter of the second mating section 82 is larger than the diameter of the first mating section 81, when the mating ring 8 is installed, the second mating ring 8 will first be squeezed and deformed to pass the abutment block 121 at the position where the mating groove 12 and the second mating section 82 are adapted, so that the abutment block 121 is located in the circumference of the first mating section 81. Therefore, without the action of external force, the mating ring 8 will not come out from between the outer sleeve 42 and the housing 1, and the lubricating oil inside the housing 1 cannot flow out of the housing 1 from this position.

[0037] The oil injection assembly 4 also includes a fitting 44 for inserting a cotton core 411 and a return spring 43. The return spring 43 is fitted onto the fitting 44, with one end fixed to the inner sleeve 41 and the other end fixed to the fitting 44. Since the return spring 43 is in close contact with the inner wall of the cotton core 411 and the fitting 44 is fitted onto the fitting 44, the return spring 43 and the fitting 44 play a positioning and guiding role during the process of the rotating part 412 being screwed into the threaded hole 415, so that the return spring 43 and the cotton core 411 can be stably squeezed. When the bolt is rotated counterclockwise and gradually separates from the threaded hole 415 in the inner sleeve 41, the setting of the return spring 43 being fixedly connected to the cotton core 411 by means of adhesive or other means allows the cotton core 411 to be driven by the reset return spring 43 to achieve reset when the return spring 43 is reset.

[0038] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A speed reducer, comprising a housing, an input shaft, an output shaft, a linkage structure located between the input shaft and the output shaft, and an oil injection assembly, wherein the housing is provided with an oil injection hole, the oil injection assembly is inserted into the oil injection hole and connected to the housing, and the input shaft and the output shaft are rotatably mounted on the left and right sides of the housing, respectively, characterized in that: It also includes two bolts. The oil injection assembly includes an outer sleeve with an oil injection hole that is detachably connected to the housing, and an inner sleeve whose outer wall fits against the inner wall of the outer sleeve. A cotton core and a rotating component for squeezing the cotton core are installed inside the inner sleeve. The inner sleeve has a first connecting hole on the left side of the cotton core, and the outer sleeve has a second connecting hole that communicates with the first connecting hole. The inner sleeve has insertion holes corresponding to each bolt, and the outer sleeve has screw holes corresponding to each insertion hole.

2. The speed reducer according to claim 1, characterized in that: The rotating component is provided with external threads in the circumferential direction, and the inner sleeve is provided with threaded holes.

3. A speed reducer according to claim 1 or 2, characterized in that: It also includes a sealing ring located between the rotating part and the inner sleeve.

4. A speed reducer according to claim 3, characterized in that: It also includes a sealing element, and the rotating element is provided with an oil injection channel above the first connecting hole. The sealing element is inserted into the oil injection channel and is detachably connected to the inner sleeve.

5. A speed reducer according to claim 4, characterized in that: The sealing element includes a sealing disc, on which several positioning blocks are protruding. The inner sleeve is provided with positioning slots corresponding to each positioning block. Each positioning block includes a positioning post and a positioning hemisphere. The diameter of each positioning hemisphere is larger than that of the corresponding positioning post. The positioning post is provided with a groove in its circumferential direction. The inner sleeve is provided with a protrusion that mates with the slot in each positioning slot.

6. A speed reducer according to claim 1, characterized in that: It also includes a mating ring made of rubber. The outer sleeve includes a connecting section and an insertion section. The connecting section is bolted to the housing. The mating ring is fitted with the insertion section. The housing is provided with a mating groove that matches the shape of the mating ring. The mating ring includes a first mating section and a second mating section. The diameter of the second mating section is larger than that of the first mating section. The housing is located in the mating groove and has an abutment block located circumferentially to the first mating section.

7. A speed reducer according to claim 1, characterized in that: The oil injection assembly also includes a fitting for inserting a cotton core and a return spring. The return spring is fitted onto the fitting and one end is fixed to the inner sleeve, while the other end is fixed to the fitting.

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