Speed reducer with small tooth difference

Abstract

The utility model relates to the technical field of roller shutter machines, in particular to a small-tooth-difference speed reducer which comprises a box body, a first opening is formed in the end, close to a bottom plate, of the side wall of the box body, a second opening is formed in the end, away from the bottom plate, of the side wall of the box body, and an input shaft is installed in the first opening through a bearing. An output shaft is mounted in the second opening through a bearing; the input shaft is integrally driven to rotate through the belt pulley, and the input shaft and the output shaft are linked through mutual matching of the cage type planet carrier and the first linkage bevel gear, so that the rotating force of the input shaft is subjected to multi-stage transmission speed reduction through an assembly to which the cage type planet carrier belongs, and then is meshed with the first linkage bevel gear through the second linkage bevel gear; the structure is compact, and the transmission torque and the large speed ratio of the speed reducer can be improved while the speed reducer can be reduced; and the last stage adopts helical gear transmission, so that the bearing capacity is increased, the noise of the equipment is reduced, the equipment can operate stably, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of rolling curtain machines, in particular to a small-tooth difference speed reducer. Background Art

[0002] Greenhouse roller shutter machines are one of the commonly used devices for maintaining ventilation in greenhouses. Their main function is to control environmental factors such as temperature and humidity in the greenhouse by opening and closing roller shutters, which is very important for the growth of crops. The reducer is the main structure of the roller shutter machine. Compared with directly using the high-speed rotation power output by the motor, it is one of the components that can reduce the speed of the high-speed rotating motor output to adapt to the required speed of the mechanical equipment.

[0003] In the current existing technology, the lengths of roller blinds on the market are roughly divided into three categories: large, medium and small. The reducer structure mostly adopts external gear transmission. If a higher reduction ratio is required, it is necessary to add a fourth or even a fifth stage of external gear transmission. Although this transmission scheme is simple and direct, due to the large number of transmission stages and low gear processing accuracy, the scheme is relatively bulky and has a certain amount of noise.

[0004] Therefore, a small-tooth difference reducer is proposed to address the above problems. Utility Model Content

[0005] In order to make up for the shortcomings of the existing technology, most reducers use external gear transmission. If a higher reduction ratio is required, it is necessary to add four or even five stages of external gear transmission. Although this transmission scheme is simple and direct, it is relatively bulky and has certain noise problems due to the large number of transmission stages and low gear processing accuracy. A reducer with a small tooth difference is proposed.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a small-tooth difference reducer described in the utility model includes a box body, a first opening is opened at the end of the box body side wall near the bottom plate, and a second opening is opened at the end of the box body side wall away from the bottom plate, an input shaft is installed inside the first opening through a bearing, and an output shaft is installed inside the second opening through a bearing, both ends of the input shaft and the output shaft are passed through to the outside of both sides of the box body, a first linked helical gear is installed at the center of the outer wall of the output shaft through a gear clamp, one end of the input shaft is fixedly connected to a pulley, and a shaft gear is fixedly connected to the outer wall of the input shaft near the edge of the other end, and the other end of the input shaft is fixedly connected to an end cover through a bearing clamp, the side wall of the end cover is fixedly connected to a fixing cover by bolts, the fixing cover is fixedly connected to the outer wall flange of the box body by bolts, and a cage planetary carrier is installed inside the fixing cover.

[0007] Preferably, the cage-type planetary carrier includes a shaft outer sleeve, a first gear ring and an internal gear ring, one end of the shaft outer sleeve is fixedly connected to a linkage cover, the inner wall of the linkage cover is fixedly connected to a second gear ring, the outer wall of the linkage cover is clamped with the inner wall of the first opening through a bearing, and the inner wall of the shaft outer sleeve is clamped with the outer wall of the input shaft through a bearing.

[0008] Preferably, the outer wall of the first gear ring is fixed to the inner wall of the fixed cover, the first gear ring is close to the side wall where the end cover is located, and the first gear ring and the second gear ring are both meshed with the built-in gear ring.

[0009] Preferably, there are multiple built-in gear rings, and the multiple built-in gear rings are installed at equally divided angles along the inner wall edge direction of the linkage cover, and the multiple built-in gear rings are all meshed with the shaft gear.

[0010] Preferably, pins are installed between the inner diameters of the multiple built-in gear rings via bearings, and positioning plates are fixed between the two ends of the multiple pins, one of the positioning plates is clamped on the inner wall of one end of the linkage cover via a bearing, and the other positioning plate is clamped on the side wall of the end cover via a bearing.

[0011] Preferably, a second linkage helical gear is fixedly connected to the outer wall of the shaft body sleeve, and the second linkage helical gear is meshed with the first linkage helical gear.

[0012] Preferably, output flanges are mounted on the outside of the gears at both ends of the output shaft.

[0013] Beneficial effects of the utility model:

[0014] In the utility model, the input shaft is driven to rotate as a whole by a pulley, and the input shaft and the output shaft are linked by the cage planetary frame and the first linked helical gear, so that the rotational force of the input shaft is reduced in speed through the multi-stage transmission of the components of the cage planetary frame, and then the second linked helical gear is meshed with the first linked helical gear, so that the output shaft is reduced in speed and rotates. The structure is compact, and the speed reducer can be lightened while the torque and high speed ratio of the speed reducer transmission are improved; the last stage adopts helical gear transmission, which increases the load-bearing capacity, reduces the noise of the equipment, and the equipment can run smoothly, thereby increasing the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0016] Figure 1 It is a three-dimensional diagram of the utility model;

[0017] Figure 2 It is a partially cutaway stereogram of the utility model;

[0018] Figure 3 It is a schematic diagram of the overall cross-section of the utility model;

[0019] Figure 4 It is a three-dimensional diagram of a cutaway view of the box body in the utility model;

[0020] Figure 5 It is a three-dimensional diagram of the input shaft and the output shaft of the utility model being separated;

[0021] Figure 6 It is a stereoscopic diagram of the cooperation between the built-in gear ring and the second gear ring in the utility model;

[0022] Figure 7 It is a three-dimensional diagram of the first gear ring and the built-in gear ring in the utility model being separated;

[0023] Legend:

[0024] 1. Box body; 11. First opening; 12. Second opening; 2. Input shaft; 3. Output shaft; 31. First linkage helical gear; 21. Pulley; 22. Shaft gear; 4. End cover; 5. Fixed cover; 6. Cage planet carrier; 61. Shaft body outer sleeve; 62. First gear ring; 63. Internal gear ring; 611. Linkage cover; 612. Second gear ring; 631. Pin shaft; 632. Positioning plate; 613. Second linkage helical gear; 32. Output flange. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Specific examples are given below.

[0027] See also Figure 1 - Figure 7The utility model provides a small-tooth difference speed reducer, including a box body 1, a first opening 11 is opened at the end of the side wall of the box body 1 near the bottom plate, and a second opening 12 is opened at the end of the side wall of the box body 1 away from the bottom plate. An input shaft 2 is installed inside the first opening 11 through a bearing, and an output shaft 3 is installed inside the second opening 12 through a bearing. Both ends of the input shaft 2 and the output shaft 3 pass through the outside of both sides of the box body 1. A first linkage helical gear 31 is installed at the center of the outer wall of the output shaft 3 through a gear clip. A pulley 21 is fixedly connected to one end of the input shaft 2, and a shaft gear 22 is fixedly connected to the edge of the outer wall of the input shaft 2 near the other end. The input shaft 2 The other end of the end cover 4 is fixed with an end cover 4 through a bearing clamp, and the side wall of the end cover 4 is fixed with a fixed cover 5 through bolts. The fixed cover 5 is fixed with the outer wall flange of the box body 1 through bolts, and a cage planet carrier 6 is installed inside the fixed cover 5. The box body 1 is respectively installed with the input shaft 2 and the output shaft 3 through the first opening 11 and the second opening 12 under the cooperation of the bearing. The pulley 21 provides a rotational output force for the device as a whole. The shaft gear 22, the cage planet carrier 6 and the first linkage helical gear 31 cooperate with each other to realize the output of a large speed ratio and a large torque of the device, and the end cover 4 and the fixed cover 5 are installed on the cage planet carrier 6 under the cooperation of bolts, bearings and the box body 1;

[0028] like Figure 1 - Figure 7As shown, the cage planet carrier 6 includes a shaft housing 61, a first gear ring 62 and a built-in gear ring 63. A linkage cover 611 is fixedly connected to one end of the shaft housing 61. A second gear ring 612 is fixedly connected to the inner wall of the linkage cover 611. The outer wall of the linkage cover 611 is clamped with the inner wall of the first opening 11 through a bearing. The inner wall of the shaft housing 61 is clamped with the outer wall of the input shaft 2 through a bearing. The outer wall of the first gear ring 62 is fixed to the inner wall of the fixed cover 5. The first gear ring 62 is close to the side wall where the end cover 4 is located. The gear ring 62 and the second gear ring 612 are both meshed with the built-in gear ring 63. The number of built-in gear rings 63 is set to be multiple. The multiple built-in gear rings 63 are installed along the inner wall edge direction of the linkage cover 611 at equal angles. The multiple built-in gear rings 63 are all meshed with the shaft gear 22. The inner diameters of the multiple built-in gear rings 63 are all installed with pins 631 through bearings. Positioning plates 632 are fixed between the two ends of the multiple pins 631. One of the positioning plates 632 is clamped on the inner wall of one end of the linkage cover 611 through a bearing. , another positioning plate 632 is clamped on the side wall of the end cover 4 through a bearing, the outer wall of the shaft housing 61 is fixedly connected with a second linkage bevel gear 613, the second linkage bevel gear 613 is meshed with the first linkage bevel gear 31, the shaft housing 61 and the linkage cover 611 are installed between the input shaft 2 and the first opening 11 under the cooperation of the bearing and the input shaft 2, and the input shaft 2, the shaft housing 61 and the linkage cover 611 can rotate relative to each other without affecting each other, and the second gear ring is passed inside the linkage cover 611 612 is meshed with the built-in gear ring 63 as a planetary gear for transmission, the pin shaft 631 and the positioning plate 632 can cooperate to install the built-in gear ring 63, and the built-in gear ring 63 can also mesh with the first gear ring 62 fixed inside the fixed cover 5, so as to realize the overall speed reduction rotation of the shaft body sleeve 61, the second gear ring 612, and the second linkage helical gear 613, and the second linkage helical gear 613 is meshed with the first linkage helical gear 31, thereby realizing the transmission output with a large speed ratio and a large torque between the input shaft 2 and the output shaft 3;

[0029] like Figure 4 and Figure 5 As shown, output flanges 32 are clamped outside the gears at both ends of the output shaft 3, and the output shaft 3 is connected to the external roller blind shaft through the output flanges 32;

[0030] Working principle: The housing 1 is used to install the input shaft 2 and the output shaft 3 through the first opening 11 and the second opening 12 respectively with the cooperation of the bearings. The pulley 21 provides the rotation output force for the whole device. The shaft gear 22, the cage planetary carrier 6 and the first linkage helical gear 31 cooperate with each other to realize the output of the device with a large speed ratio and a large torque. The end cover 4 and the fixed cover 5 are used to install the cage planetary carrier 6 with the cooperation of the bolts, the bearings and the housing 1. The shaft body jacket 61 and the linkage cover 611 are installed between the input shaft 2 and the first opening 11 with the cooperation of the bearings and the input shaft 2, and the input shaft 2 and the shaft body jacket 61 and the linkage cover 611 can be connected. The second gear ring 612 and the built-in gear ring 63 as a planetary gear are meshed and transmitted inside the linkage cover 611, and the pin shaft 631 and the positioning plate 632 can cooperate to install the built-in gear ring 63, and the built-in gear ring 63 can also mesh with the first gear ring 62 fixed inside the fixed cover 5, so as to realize the overall speed reduction rotation of the shaft body sleeve 61, the second gear ring 612, and the second linkage bevel gear 613, and the second linkage bevel gear 613 meshes with the first linkage bevel gear 31, thereby realizing the transmission output with a large speed ratio and a large torque between the input shaft 2 and the output shaft 3, and the output shaft 3 is connected to the external roller blind shaft through the output flange 32.

[0031] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A small-tooth difference reducer, characterized in that: The invention comprises a box body (1), wherein a first opening (11) is provided at an end of a side wall of the box body (1) close to a bottom plate, and a second opening (12) is provided at an end of a side wall of the box body (1) away from the bottom plate. An input shaft (2) is installed inside the first opening (11) via a bearing, and an output shaft (3) is installed inside the second opening (12) via a bearing. Both ends of the input shaft (2) and the output shaft (3) pass through the outside of both sides of the box body (1), and the center of the outer wall of the output shaft (3) passes through a A first linked helical gear (31) is mounted through the gear clamp, a pulley (21) is fixedly connected to one end of the input shaft (2), a shaft gear (22) is fixedly connected to the outer wall of the input shaft (2) near the edge of the other end, an end cover (4) is mounted on the other end of the input shaft (2) through a bearing clamp, a fixing cover (5) is fixedly connected to the side wall of the end cover (4) through bolts, the fixing cover (5) is fixedly connected to the outer wall flange of the housing (1) through bolts, and a cage-type planetary carrier (6) is installed inside the fixing cover (5).

2. A small-tooth-difference reducer according to claim 1, characterized in that: The cage-type planet carrier (6) comprises a shaft outer sleeve (61), a first gear ring (62) and an internal gear ring (63); one end of the shaft outer sleeve (61) is fixedly connected to a linkage cover (611); the inner wall of the linkage cover (611) is fixedly connected to a second gear ring (612); the outer wall of the linkage cover (611) is clamped with the inner wall of the first opening (11) via a bearing; and the inner wall of the shaft outer sleeve (61) is clamped with the outer wall of the input shaft (2) via a bearing.

3. A small-tooth-difference reducer according to claim 2, characterized in that: The outer wall of the first gear ring (62) is fixed to the inner wall of the fixed cover (5), the first gear ring (62) is close to the side wall where the end cover (4) is located, and the first gear ring (62) and the second gear ring (612) are both meshed with the built-in gear ring (63).

4. A small-tooth-difference reducer according to claim 3, characterized in that: The number of the built-in gear rings (63) is multiple, and the multiple built-in gear rings (63) are installed at equal angles along the inner wall edge direction of the linkage cover (611), and the multiple built-in gear rings (63) are all meshed with the shaft gear (22).

5. A small-tooth-difference reducer according to claim 4, characterized in that: A pin shaft (631) is installed between the inner diameters of the plurality of built-in gear rings (63) via bearings, and a positioning plate (632) is fixedly connected between the two ends of the plurality of pin shafts (631), wherein one of the positioning plates (632) is clamped on the inner wall of one end of the linkage cover (611) via a bearing, and another of the positioning plates (632) is clamped on the side wall of the end cover (4) via a bearing.

6. A small-tooth-difference reducer according to claim 5, characterized in that: A second linkage bevel gear (613) is fixedly connected to the outer wall of the shaft housing (61), and the second linkage bevel gear (613) is meshed with the first linkage bevel gear (31).

7. The small-tooth-difference reducer according to claim 1, characterized in that: Output flanges (32) are clamped on the outside of the gears at both ends of the output shaft (3).

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