A kind of cycloidal speed reducer convenient lubrication

Abstract

The utility model discloses a kind of cycloidal speed reducer facilitating lubrication, including shell, the shell one end is open design, and shell is away from its open end fixed with motor, the motor output end is located in shell interior and is fixedly connected with speed reduction assembly, the shell open end is fixed with end cap, and end cap middle part is rotatably connected with output shaft by bearing, the output shaft is connected with speed reduction assembly;In the utility model, shell, motor, speed reduction assembly, end cap, oil box, oil drain pipe, plugging ball and bottom cover are set, when replacing lubricating oil in shell interior, first bottom cover is screwed off from the bottom of oil drain pipe, plugging ball in oil drain pipe drops at this time, oil drain pipe is conducted, then the top cover of oil box top is screwed off, so that lubricating oil can be automatically discharged from oil drain pipe, when lubricating oil in shell interior is completely discharged, lubricating oil is added to shell interior again, the whole process of replacing lubricating oil does not need to disassemble end cap, so that the replacement of lubricating oil is more convenient.

Description

Technical Field

[0001] This utility model relates to the technical field of cycloidal pinwheel reducers, and in particular to a cycloidal pinwheel reducer that is easy to lubricate. Background Technology

[0002] A cycloidal pinwheel reducer is a high-precision, high-torque speed reduction device. Its core principle is based on cycloidal pinwheel meshing transmission, achieving a large reduction ratio and high efficiency through a unique structural design. The structure and working principle of the cycloidal wheel section inside the reducer housing are as follows: A pin tooth shell is fixed inside the housing, with a ring of evenly distributed pin teeth (pin wheels) on the shell. The cycloidal wheel is mounted on the input shaft via an eccentric bearing, and its outer edge is designed with a special cycloidal tooth profile. When the input shaft rotates, the eccentric bearing drives the cycloidal wheel to perform planar eccentric motion. The teeth of the cycloidal wheel mesh with the fixed pin teeth, forcing the cycloidal wheel to rotate in the opposite direction while revolving around the central axis. Since the rotational motion of the cycloidal wheel is transmitted to the output shaft through the output mechanism (usually a pin or hole pin mechanism), and the number of teeth on the cycloidal wheel is one less than that on the pin teeth, this difference in the number of teeth reduces the high-speed rotation of the input shaft to a low-speed rotation of the output shaft.

[0003] A search revealed that patent CN221569380U discloses a cycloidal pinwheel reducer that is easy to lubricate. It uses a lubrication assembly to store lubricating oil in an oil tank, and the lubricating oil then enters the reducer body from the oil tank.

[0004] However, the above-mentioned device has the following drawbacks: after the reducer body is used, the lubricating effect of the lubricating oil inside the reducer body deteriorates rather than decreases. Therefore, it is necessary to replace the lubricating oil inside the reducer body, rather than replenishing the lubricating oil. The above-mentioned reducer does not have an oil draining structure. Therefore, when changing the lubricating oil, it is necessary to disassemble the reducer housing, drain the lubricating oil, and then add lubricating oil, just like existing reducers. This makes the lubricating oil change inconvenient. To address this, we propose a cycloidal pinwheel reducer that is easy to lubricate. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a cycloidal pinwheel reducer that is easy to lubricate.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a cycloidal pinwheel reducer that is easy to lubricate, comprising a housing, one end of which is open, and a motor is fixed at the end of the housing away from the open end. The output end of the motor is located inside the housing and is fixedly connected to a reduction assembly. An end cover is fixed at the open end of the housing, and an output shaft is rotatably connected to the middle of the end cover via a bearing. The output shaft is connected to the reduction assembly. An oil inlet is provided at the top of the housing, and an oil box is fixed on the upper surface of the housing. The oil inlet is located inside the oil box. A top cover is rotatably connected to the top surface of the oil box via a thread. An air inlet is fixed on one side of the top cover. An oil drain pipe is passed through and fixed at the bottom of the housing. A sealing assembly is provided inside the oil drain pipe, and a bottom cover is rotatably connected to the bottom surface of the oil drain pipe via a thread.

[0007] Furthermore, the end cap is fixedly connected to the housing via a flange, and a sealing strip is provided between the end cap and the housing.

[0008] Furthermore, sealing rings are provided between the top cover and the top of the oil box, and between the bottom cover and the oil drain pipe.

[0009] Furthermore, a sealing cap is rotatably connected to the surface of the inflation nozzle via a thread.

[0010] Furthermore, the sealing assembly includes a first ring plate and a second ring plate fixed inside the oil drain pipe, a sealing ball is disposed between the first ring plate and the second ring plate, a top rod is fixed to the bottom wall of the bottom cover, the top end of the top rod is in contact with the lower surface of the sealing ball, and the top end of the sealing ball is inserted into the middle of the second ring plate.

[0011] Furthermore, a tension spring is fixed to the bottom end of the sealing ball and the upper surface of the first ring plate.

[0012] Furthermore, a base is fixed to the lower surface of the housing, and the base has multiple mounting holes.

[0013] The beneficial effects of this utility model are:

[0014] 1. In use, this utility model includes a housing, a motor, a reduction gear assembly, an end cover, an oil box, an oil drain pipe, a sealing ball, and a bottom cover. When changing the lubricating oil inside the housing, first unscrew the bottom cover from the bottom of the oil drain pipe. At this time, the sealing ball inside the oil drain pipe descends, and the oil drain pipe is open. Then, unscrew the top cover of the oil box so that the lubricating oil can be automatically discharged from the oil drain pipe. After the lubricating oil inside the housing is completely drained, lubricating oil is added back into the housing. The entire process of changing the lubricating oil does not require disassembling the end cover, thus making the change of lubricating oil more convenient.

[0015] 2. When using this utility model, a shell, an oil box, a top cover, and an air inlet are provided. When the lubricating oil inside the shell is discharged, air can be injected into the shell using the air inlet, which can squeeze out the lubricating oil inside the shell more quickly and improve the efficiency of changing the lubricating oil. Attached Figure Description

[0016] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments 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.

[0017] Figure 1 This is a perspective view of the entire utility model;

[0018] Figure 2 This is an overall sectional view of the present invention;

[0019] Figure 3 For the present utility model Figure 2 Enlarged view of point A in the middle;

[0020] Figure 4 For the present utility model Figure 2 Enlarged view of section B in the middle.

[0021] The attached figures are labeled as follows:

[0022] 1. Housing; 2. Motor; 3. Reduction assembly; 4. End cover; 5. Output shaft; 6. Oil box; 7. Top cover; 8. Sealing ring; 9. Air inlet; 10. Sealing cover; 11. Base; 12. Oil drain pipe; 13. First ring plate; 14. Second ring plate; 15. Tension spring; 16. Sealing ball; 17. Bottom cover; 18. Top rod. Detailed Implementation

[0023] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figures 1-4As shown, a cycloidal pinwheel reducer that is easy to lubricate is disclosed. It includes a housing 1, one end of which is open, and a motor 2 is fixed to the end of the housing 1 away from the open end. The output end of the motor 2 is located inside the housing 1 and is fixedly connected to a reduction assembly 3. An end cover 4 is fixed to the open end of the housing 1, and an output shaft 5 is rotatably connected to the middle of the end cover 4 via a bearing. The output shaft 5 is connected to the reduction assembly 3. An oil inlet is provided at the top of the housing 1, and an oil box 6 is fixed to the upper surface of the housing 1. The oil inlet is located inside the oil box 6. A top cover 7 is rotatably connected to the top surface of the oil box 6 via a thread. An air inlet 9 is fixed to one side of the top cover 7. An oil drain pipe 12 is passed through and fixed to the bottom of the housing 1. A sealing assembly is provided inside the oil drain pipe 12, and a bottom cover 17 is rotatably connected to the bottom surface of the oil drain pipe 12 via a thread.

[0025] In this embodiment, the reduction assembly 3 adopts the existing technology structure, including the eccentric bearing, cycloidal wheel, fixed center wheel and other structures. The connection method between the reduction assembly 3 and the motor 2 and the output shaft 5 also adopts the existing technology. The working principle can be simply described as the input shaft of the motor 2 driving the eccentric bearing to rotate, the eccentric bearing driving the cycloidal wheel to rotate, and finally driving the output shaft 5 to rotate.

[0026] The end cap 4 is fixedly connected to the housing 1 by a flange, and a sealing strip is provided between the end cap 4 and the housing 1.

[0027] This allows the end cap 4 to be removed from the housing 1, facilitating the maintenance of the speed reduction assembly 3 inside the housing 1.

[0028] A sealing ring 8 is provided between the top cover 7 and the top of the oil box 6, and between the bottom cover 17 and the oil drain pipe 12.

[0029] After unscrewing the top cover 7 from the top of the oil box 6, it is easy to add lubricating oil into the oil box 6. The oil will enter the interior of the housing 1 through the oil inlet at the top of the housing 1. The sealing ring 8 is provided to increase the sealing performance.

[0030] The surface of the air inlet 9 is connected to a sealing cap 10 by a threaded rotation.

[0031] The sealing assembly includes a first ring plate 13 and a second ring plate 14 fixed inside the oil drain pipe 12. A sealing ball 16 is disposed between the first ring plate 13 and the second ring plate 14. A push rod 18 is fixed to the bottom wall of the bottom cover 17. The top end of the push rod 18 is in contact with the lower surface of the sealing ball 16. The top end of the sealing ball 16 is inserted into the middle of the second ring plate 14.

[0032] When the bottom cover 17 is screwed onto the surface of the oil drain pipe 12, the push rod 18 pushes the sealing ball 16 upward, and the sealing ball 16 gets stuck in the round hole in the middle of the second ring plate 14, thereby achieving the sealing of the oil drain pipe 12.

[0033] A tension spring 15 is fixed to the bottom end of the blocking ball 16 and the upper surface of the first ring plate 13.

[0034] When the bottom cover 17 is unscrewed from the bottom of the oil drain pipe 12, the tension spring 15 will pull the sealing ball 16 down, thereby opening the oil drain pipe 12 and allowing the lubricating oil in the housing 1 to drain out through the oil drain pipe 12. Furthermore, operators can periodically unscrew the bottom cover 17 to drain a small amount of lubricating oil and check if the lubricating oil needs to be replaced.

[0035] A base 11 is fixed to the lower surface of the housing 1, and multiple mounting holes are provided on the base 11.

[0036] Working principle: When it is necessary to change the lubricating oil inside the housing 1, first unscrew the bottom cover 17, then unscrew the sealing cover 10. Next, attach the air pump inflation hose to the surface of the air inlet 9, start the air pump to inflate the oil box 6, and squeeze out the lubricating oil inside the housing 1. The lubricating oil will then be discharged from the oil drain pipe 12. After the lubricating oil is drained, screw on the bottom cover 17, then add new lubricating oil to the oil box 6. The lubricating oil will then enter the housing 1 through the oil inlet. Finally, screw on the top cover 7 and the sealing cover 10 in sequence.

[0037] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A cycloidal pinwheel reducer that is easy to lubricate, comprising a housing (1), one end of which is open, and a motor (2) is fixed to the end of the housing (1) away from its open end, the output end of which is located inside the housing (1) and fixedly connected to a reduction assembly (3), an end cover (4) is fixed to the open end of the housing (1), and an output shaft (5) is rotatably connected to the middle of the end cover (4) via a bearing, the output shaft (5) being connected to the reduction assembly (3), characterized in that: The top of the housing (1) is provided with an oil inlet, and an oil box (6) is fixed on the upper surface of the housing (1). The oil inlet is located inside the oil box (6). The top surface of the oil box (6) is connected to a top cover (7) by a threaded rotation. An air inlet (9) is fixed on one side of the top cover (7). An oil drain pipe (12) is passed through and fixed at the bottom of the housing (1). A sealing component is provided inside the oil drain pipe (12), and a bottom cover (17) is connected to the bottom surface of the oil drain pipe (12) by a threaded rotation.

2. The cycloidal pinwheel reducer with easy lubrication according to claim 1, characterized in that: The end cap (4) is fixedly connected to the housing (1) by a flange, and a sealing strip is provided between the end cap (4) and the housing (1).

3. The cycloidal pinwheel reducer with easy lubrication according to claim 1, characterized in that: A sealing ring (8) is provided between the top cover (7) and the top of the oil box (6) and between the bottom cover (17) and the oil drain pipe (12).

4. The cycloidal pinwheel reducer with easy lubrication according to claim 1, characterized in that: The surface of the inflation nozzle (9) is connected to a sealing cap (10) by a threaded rotation.

5. A cycloidal pinwheel reducer with easy lubrication according to claim 1, characterized in that: The sealing assembly includes a first ring plate (13) and a second ring plate (14) fixed inside the drain pipe (12). A sealing ball (16) is provided between the first ring plate (13) and the second ring plate (14). A top rod (18) is fixed to the bottom wall of the bottom cover (17). The top of the top rod (18) is in contact with the lower surface of the sealing ball (16). The top of the sealing ball (16) is inserted into the middle of the second ring plate (14).

6. A cycloidal pinwheel reducer with easy lubrication according to claim 5, characterized in that: The bottom end of the blocking ball (16) and the upper surface of the first ring plate (13) are both fixed with a tension spring (15).

7. A cycloidal pinwheel reducer with easy lubrication according to claim 1, characterized in that: The lower surface of the housing (1) is fixed with a base (11), and the base (11) has multiple mounting holes.

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