Rotary speed reducer for limiting the rotation of a main shaft and realizing the rotation angle limitation of an output end

Abstract

The utility model discloses a rotary speed reducer that restricts the rotation number of main shaft to realize the rotation angle limitation of output end, relates to the technical field of speed reducer, and aims at solving the problem that the traditional rotary speed reducer directly limits the output end by setting the boss in the shell, and the output end torque is amplified, so that the limiting boss is easy to damage, and the photovoltaic panel of output end needs to be unloaded when maintaining, and the maintenance process is complex. It sets the limiting mechanism on the main shaft, limits the rotation number of the main shaft whose torque is not amplified, and then accurately controls the angle of the rotation of the output end. The utility model limiting mechanism is small in stress, strong in durability, convenient in maintenance and low in cost, stable in transmission, and can guarantee the angle adjustment accuracy of photovoltaic panel.

Description

Technical Field

[0001] This utility model relates to the field of speed reducer technology, and in particular to a rotary speed reducer that limits the rotation angle of the output end by limiting the number of rotations of the main shaft. Background Technology

[0002] In the application of rotary reducers for photovoltaic applications, the rotation range of the output end needs to be limited to ensure the accuracy of photovoltaic panel angle adjustment.

[0003] The traditional limiting method involves setting a boss at a corresponding position on the inner side of the reducer housing. The boss directly blocks the worm gear teeth on the output end, thereby limiting the rotation angle of the output end and achieving the limiting function. For example, CN202421036009.3 uses limiting bosses on the housing and gear to limit the rotation of the gear.

[0004] Existing rotary reducers have the following shortcomings:

[0005] 1. Easily damaged: When the output end is driven to rotate by the spindle, the torque will increase significantly, causing the force to concentrate between the boss and the worm gear teeth. After long-term use, the boss or worm gear teeth are prone to damage.

[0006] 2. Affects transmission stability: Fragments generated by damage to the boss or worm gear teeth can enter the meshing area between the main shaft and the output end, interfering with the normal transmission between the two and reducing the working reliability of the reducer.

[0007] 3. High maintenance costs: Damage to the boss makes repair difficult. Repairing requires removing the photovoltaic panels installed on the output end, which complicates the repair process, increases the workload, and raises maintenance costs. Utility Model Content

[0008] To overcome the above deficiencies, this utility model provides a rotary reducer that limits the number of rotations of the main shaft to achieve the limitation of the rotation angle of the output end, aiming to improve the above problems.

[0009] To achieve the above objectives, the present invention adopts the following technical solution: a rotary reducer that limits the number of rotations of the main shaft to achieve the limitation of the rotation angle of the output end, comprising a housing and a transmission part.

[0010] Furthermore: the transmission part includes a main shaft and an output end. The main shaft is rotatably connected to the housing, and the output end is rotatably connected to the housing. The main shaft and the output end mesh with each other for transmission. The main shaft is characterized in that: the tail end of the main shaft is provided with a main shaft threaded part, and also includes a limiting component. The limiting component includes a limiting plate. The limiting plate is threadedly engaged with the main shaft threaded part. The rotation of the main shaft threaded part drives the limiting plate to perform linear motion. The limiting component also includes a limiting part that limits the linear motion range of the limiting plate.

[0011] Furthermore: the limiting plate is provided with a threaded hole, the limiting plate is threadedly engaged with the threaded part of the main shaft through the threaded hole, the limiting plate is also provided with a sliding hole, the limiting part also includes a guide component fixed relative to the housing, and the limiting plate is slidably connected to the guide component through the sliding hole.

[0012] Furthermore: the guide component is a guide rod, the front end of the guide rod is a guide rod threaded part, the middle section and the tail of the guide rod are both guide rod sliding areas, the guide rod sliding area (52) is a smooth rod, the guide rod is threaded to the housing through the guide rod threaded part, and the guide rod is slidably connected to the limiting plate through the sliding hole in the guide rod sliding area.

[0013] Furthermore: the middle section of the main shaft is provided with a worm gear, and the two sides of the worm gear are respectively provided with a first bearing mounting part and a second bearing mounting part. The limiting part includes a left limiting part and a right limiting part. The end face of the first bearing mounting part is the left limiting part. The limiting assembly also includes an end cover. The end cover is fixedly connected to the housing. The end face of the end cover is the right limiting part.

[0014] Furthermore: a limiting boss and a guide rod hole are provided on the side of the end cap near the limiting plate, the end face of the limiting boss near the limiting plate is the right limiting surface, and the tail of the guide rod is inserted into the guide rod hole.

[0015] Furthermore: a bearing is mounted on the outer surface of the first bearing mounting part and the second bearing mounting part of the spindle. The bearing is mounted between the spindle and the housing. The spindle also includes a bearing locking ring. The outer arc surface of the bearing locking ring is threaded. The bearing locking ring is threaded to the housing. The end face of the bearing locking ring is in contact with the end face of the outer ring of the bearing.

[0016] Furthermore, a gear ring is provided on the output end, and the gear ring meshes with the worm gear on the main shaft for transmission.

[0017] Furthermore: a sliding bearing sleeve is installed between the output end and the housing, and the output end is rotatably connected to the housing through the sliding bearing sleeve.

[0018] Furthermore, a bearing 2 is installed between the output end and the housing, and the output end is rotatably connected to the housing through the bearing 2.

[0019] Furthermore, it also includes a skeleton oil seal, which is provided between the housing and the output end, and is located on the outside of the sliding bearing sleeve. A skeleton oil seal is also provided between the spindle and the housing, and is located on the outside of the bearing.

[0020] This utility model has the following beneficial effects:

[0021] 1. High durability of the limiting mechanism: The limiting mechanism is set at the end of the main shaft. The torque at this position is not amplified, and the force on the limiting plate is small. This effectively avoids the problem of easy damage caused by the concentrated force on the traditional limiting boss and worm gear, and extends the service life of the reducer.

[0022] 2. Convenient maintenance and low cost: The limit mechanism is located at the end of the spindle, and the port is closed by the end cover. When the limit plate needs to be repaired or replaced, it can be operated by simply unscrewing the fixing bolts of the end cover. There is no need to replace the entire housing, which greatly reduces the difficulty and cost of maintenance.

[0023] 3. High transmission stability: The limit mechanism is independently set at the end of the main shaft. Even if it is damaged, the resulting fragments will not enter the meshing area between the main shaft and the output end, avoiding interference with the transmission process and ensuring the reliability of the reducer.

[0024] 4. Precise and reliable positioning: The limiting plate is installed on the threaded part of the main shaft through a threaded connection, and moves smoothly under the drive of the main shaft by sliding cooperation with the guide rod. With the limiting function of the end cover, it can accurately limit the number of rotations of the main shaft, thereby accurately controlling the rotation angle of the output end and ensuring the accuracy of photovoltaic panel angle adjustment. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this utility model;

[0026] Figure 2 This is a side view of the present invention;

[0027] Figure 3 This is a front sectional view of the present invention;

[0028] Figure 4 This is a side sectional view of the present invention;

[0029] Figure 5 for Figure 4 Enlarged view of section A in the middle;

[0030] Figure 6 for Figure 4 Enlarged view of section D in the middle;

[0031] Figure 7 A schematic diagram of the mating structure between the spindle and the output end;

[0032] Figure 8 for Figure 7 Enlarged view of section B;

[0033] Figure 9 This is a schematic diagram of the limiting plate.

[0034] Figure 10 This is a schematic diagram of the guide rod structure;

[0035] Figure 11 Main view of the mating structure between the spindle and the output end;

[0036] Figure 12 A schematic diagram of the main shaft structure;

[0037] Figure 13 Main axis sectional view;

[0038] Figure 14 Sectional view of the spindle mounting;

[0039] Figure 15 for Figure 13 Enlarged view of section C;

[0040] Figure 16 This is a schematic diagram of the output terminal structure;

[0041] Figure 17 This is a schematic diagram showing the structure and relative position of the end cap and the extension sleeve;

[0042] Figure 18 This is the front sectional view of the first limiting state;

[0043] Figure 19 This is the front sectional view of the second limiting state;

[0044] Figure 20 This is a side sectional view of the present invention after the sliding bearing sleeve has been replaced with a bearing.

[0045] Legend:

[0046] 1. Housing; 11. Mounting foot; 12. Flange; 13. Oil seal; 14. Extended sleeve; 2. Output end; 21. Gear ring; 22. Mounting platform; 23. Sliding bearing sleeve; 3. Spindle; 31. Worm gear section; 32. Spindle threaded section; 33. First bearing mounting section; 34. Second bearing mounting section; 35. Worm keyway hole; 4. Limiting plate; 41. Threaded hole; 42. Sliding hole; 5. Guide rod; 51. Guide rod threaded section; 52. Guide rod sliding area; 6. Bearing one; 61. Bearing two; 7. Bearing locking ring; 8. End cover; 81. Limiting boss; 82. Guide rod hole; 9. Power component. Detailed Implementation

[0047] 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.

[0048] Example 1

[0049] Reference Figures 1-19 The present invention provides a rotary reducer that limits the rotation angle of the output end by limiting the number of rotations of the main shaft, comprising a housing 1 and a transmission part.

[0050] The housing 1 is the core supporting component of this utility model. The upper half of the housing 1 is an arc-shaped cavity with a through hole in the front view for mounting and supporting the output end 2. The lower half of the housing 1 is a cavity communicating with the upper cavity with a through hole in the side view for mounting and supporting the spindle 3. The bottom of the housing 1 is provided with mounting feet 11 with mounting holes, which can be directly fastened to the equipment frame or foundation platform by bolts. Reinforcing ribs are provided at the weak points of the housing 1 so as not to interfere with the normal operation of this utility model.

[0051] The transmission system includes an output end 2, a main shaft 3, a power component 9, and a limit assembly.

[0052] The middle section of the output end 2 is provided with a gear ring 21, which meshes with the worm gear part 31 on the main shaft 3. Here, the gear ring 21 is selected as a worm gear that meshes with the worm gear part 31. Both ends of the output end 2 are provided with mounting platforms 22, which have multiple mounting holes for connecting the photovoltaic panel bracket. The output end 2 is installed in the through hole on the main viewing surface of the upper half of the housing 1. In order to facilitate the installation of the output end 2 into the housing 1 from one end, the diameter of one side of the hole will be larger. On the side of the through hole with a larger diameter, a bolt is used. A flange 12 is fixedly connected to fit the diameter of the output end 2. Sliding bearing sleeves 23 are installed on both sides of the gear ring 21. The sliding bearing sleeves 23 on both sides are respectively installed between the housing 1 and the output end 2 and between the flange 12 and the output end 2, so as to realize the relative rotation between the output end 2 and the housing 1. The cross-sectional shape of the sliding bearing sleeve 23 is L-shaped. A skeleton oil seal 13 is provided between the housing 1 and the output end 2 and between the flange 12 and the output end 2 to seal and prevent the lubricating oil in the cavity from leaking out.

[0053] The middle section of the spindle 3 is provided with a worm gear portion 31 that is adapted to the gear ring 21. One end of the spindle 3 has a worm keyway hole 35 on its end face for key connection with the power component 9. At the end of the spindle 3 near the power component 9 is a second bearing mounting portion 34 for mounting bearing 6. At the other end of the spindle 3 is a spindle thread portion 32 for limiting. Between the spindle thread portion 32 and the worm gear portion 31 is a first bearing mounting portion 33 for mounting bearing 6. The diameter of the first bearing mounting portion 33 is larger than that of the spindle thread portion 32. The spindle 3 is installed in a through hole on the side view of the lower half of the housing 1. Between the spindle 3 and the housing 1 is a... Bearing 6 is mounted on the housing 1 at the end of the spindle 3 connected to the power component 9. The outer circumferential surface of the bearing locking ring 7 is threaded and is installed on the housing 1 by threaded connection to lock the bearing 6. At one end of the spindle thread 32, an end cover 8 is bolted to the housing 1 to limit the movement range of the limiting plate 4 on the spindle thread 32. A skeleton oil seal 13 is provided between the bearing locking ring 7 and the spindle 3. A skeleton oil seal 13 is also provided between the housing 1 and the spindle 3 on the outer side of the bearing 6 near the spindle thread 32 of the spindle 3, which serves as a seal to prevent the leakage of lubricating oil in the cavity.

[0054] The limiting assembly includes a limiting plate 4, a guide component, an extension sleeve 14, and an end cap 8.

[0055] The spindle thread 32 extends out of the housing 1, and through the end cap 8 and the extension sleeve 14, a new cavity is formed outside the housing 1 including the spindle thread 32.

[0056] Both the end cap 8 and the extension sleeve 14 are provided with multiple through holes. Bolts pass through the through holes on the end cap 8 and the extension sleeve 14 in sequence and are fixed to the housing 1. The end cap 8 is provided with a guide rod hole 82 on the side facing the main shaft 3, which corresponds to the guide rod 5 and is used to fix one end of the guide rod 5. The end cap 8 is provided with an extended limiting boss 81 on the side facing the main shaft 3.

[0057] The guiding component is a guide rod 5. One end of the guide rod 5 is threaded, which is the guide rod threaded part 51. The guide rod 5 is threaded to the housing 1 through the guide rod threaded part 51. The rest of the guide rod 5 is the guide rod sliding area 52. The guide rod 5 is slidably connected to the limiting plate 4 through the guide rod sliding area 52, thereby controlling the limiting plate 4 to make linear movement. The end face of the guide rod sliding area 52 on the guide rod 5 is inserted into the guide rod hole 82. The guide rod 5 is provided with two rods, one upper and one lower, so that the linear movement of the limiting plate 4 is more stable.

[0058] The limiting plate 4 has a threaded hole 41. The limiting plate 4 is threadedly engaged with the main shaft threaded part 32 through the threaded hole 41. Both the upper and lower ends of the limiting plate 4 are provided with sliding holes 42 that are adapted to the guide rod 5. The limiting plate 4 is slidably connected with the guide rod sliding area 52 of the guide rod 5 through the sliding holes 42. The main shaft threaded part 32 rotates with the main shaft 3. The limiting plate 4 moves linearly under the restriction of the guide rod 5 and the drive of the main shaft threaded part 32. The direction of movement is related to the rotation direction of the main shaft 3.

[0059] The limiting assembly also includes a limiting part that restricts the linear movement range of the limiting plate 4. The limiting part consists of a left limiting part and a right limiting part. When the limiting plate 4 moves to the left along the main shaft thread 32, because the diameter of the first bearing mounting part 33 is larger than that of the main shaft thread 32, the end face of the first bearing mounting part 33 will restrict the limiting plate 4 from continuing to move linearly to the left. Therefore, the end face of the first bearing mounting part 33 is the left limiting part. When the limiting plate 4 moves to the right along the main shaft thread 32, an end cap 8 is installed at the end of the guide rod 5. The end cap 8 has a limiting boss 81 on the side facing the limiting plate 4. The end face of the limiting boss 81 will restrict the limiting plate 4 from continuing to move linearly to the right along the main shaft thread 32. Therefore, the end face of the limiting boss 81 is the right limiting part.

[0060] During operation, the power component 9 is a motor, and the bearing 6 is a tapered roller bearing. The motor drives the main shaft 3 to rotate. The main shaft 3 and the housing 1 rotate relative to each other through the tapered roller bearing. The worm gear 31 on the main shaft 3 meshes with the gear ring 21, thereby driving the output end 2 to rotate. The output end 2 and the housing 1 rotate relative to each other through the sliding bearing sleeve 23. During the transmission process, the output rotation speed is reduced and the output torque is increased. When the main shaft 3 rotates, the main shaft thread 32 rotates synchronously. The guide rod 5 causes the limiting plate 4 to move linearly along the main shaft thread 32. The end face of the first bearing mounting part 33 on the main shaft 3 and the end face of the upper limit boss 81 on the end cover 8 limit the movement range of the limiting plate 4. When the limiting plate 4 moves to the limit distance in one direction, the main shaft 3 can no longer rotate in that rotation direction. The worm gear 31 and the gear ring 21 self-lock, so that the output end stays at a fixed angle, thereby allowing the photovoltaic panels installed on the mounting platform 22 to change angle.

[0061] Example 2

[0062] refer to Figure 1 , 2 The differences between the first embodiment and the second embodiment are as follows: the housing 1 and the output end 2 are rotatably connected by the bearing 61, and the inner and outer rings of the bearing are limited by the corresponding flange 12 and the snap ring; the gear ring 21 is a helical gear that meshes with the worm gear 31.

[0063] When in operation, the helical gear of the gear ring 21 meshes with the worm gear 31 for transmission. Chapters 10 and 11 of "Mechanical Design" (edited by Pu Liangui and Ji Minggang, Higher Education Press) reveal that when the normal module is equal and the helix angle of the worm is equal to the helix angle of the helical gear, the worm can mesh with the helical gear.

[0064] This utility model sets the limiting mechanism at the end of the main shaft 3. The torque on the main shaft 3 is not amplified, the force on the limiting plate 4 is small and not easily damaged. In addition, the limiting mechanism is set at the end of the main shaft 3 and the port is sealed with the end cover 8. When damage occurs or the limiting plate 4 needs to be replaced, the limiting mechanism can be repaired or replaced simply by unscrewing the fixing bolts of the end cover 8.

[0065] When limiting the rotation angle of photovoltaic panels, mechanical limiting is the last line of defense. The first line of defense is electronic limiting. When electronic limiting fails, mechanical limiting is used to keep the module at a certain angle to prevent it from twisting and causing damage. When electronic limiting fails, mechanical limiting takes effect, and the motor will continue to supply power. Eventually, the motor will overload and fail, sacrificing the motor to ensure the safety of the module and the entire system.

Claims

1. A rotary reducer that limits the rotation angle of the output end by limiting the number of rotations of the main shaft, comprising a housing (1) and a transmission part, wherein the transmission part comprises a main shaft (3) and an output end (2), the main shaft (3) is rotatably connected to the housing (1), the output end (2) is rotatably connected to the housing (1), and the main shaft (3) and the output end (2) are meshed and driven, characterized in that: The tail of the spindle (3) is provided with a spindle threaded part (32) and also includes a limiting component. The limiting component includes a limiting plate (4). The limiting plate (4) is threadedly engaged with the spindle threaded part (32). The spindle threaded part (32) rotates to drive the limiting plate (4) to perform linear motion. The limiting component also includes a limiting part that limits the linear motion range of the limiting plate (4).

2. The rotary reducer for limiting the output rotation angle by limiting the number of spindle rotations as described in claim 1, characterized in that: The limiting plate (4) is provided with a threaded hole (41), and the limiting plate (4) is threadedly engaged with the main shaft threaded part (32) through the threaded hole (41). The limiting plate (4) is also provided with a sliding hole (42). The limiting part also includes a guide component fixed relative to the housing (1). The limiting plate (4) is slidably connected to the guide component through the sliding hole (42).

3. The rotary reducer for limiting the output rotation angle by limiting the number of spindle rotations as described in claim 2, characterized in that: The guiding component is a guide rod (5). The front end of the guide rod (5) is a guide rod threaded part (51). The middle section and the tail of the guide rod (5) are both guide rod sliding areas (52). The guide rod sliding area (52) is a smooth rod. The guide rod (5) is threaded to the housing (1) through the guide rod threaded part (51). The guide rod (5) is slidably connected to the limiting plate (4) through the sliding hole (42) via the guide rod sliding area (52).

4. The rotary reducer for limiting the output rotation angle by limiting the number of spindle rotations as described in claim 3, characterized in that: The spindle (3) has a worm gear (31) in the middle section. The worm gear (31) has a first bearing mounting part (33) and a second bearing mounting part (34) on both sides. The limiting part includes a left limiting part and a right limiting part. The end face of the first bearing mounting part (33) is the left limiting part. The limiting assembly also includes an end cover (8). The end cover (8) is fixedly connected to the housing (1). The end face of the end cover (8) is the right limiting part.

5. The rotary reducer for limiting the output rotation angle by limiting the number of spindle rotations as described in claim 4, characterized in that: The end cap (8) is provided with a limiting boss (81) and a guide rod hole (82) on the side near the limiting plate (4). The end face of the limiting boss (81) near the limiting plate (4) is the right limiting face. The tail of the guide rod (5) is inserted into the guide rod hole (82).

6. The rotary reducer for limiting the output rotation angle by limiting the number of spindle rotations as described in claim 4, characterized in that: Bearing 6 is mounted on the outer surfaces of the first bearing mounting part (33) and the second bearing mounting part (34) of the main shaft (3). The bearing 6 is mounted between the main shaft (3) and the housing (1). It also includes a bearing locking ring (7). The outer arc surface of the bearing locking ring (7) is threaded. The bearing locking ring (7) is threaded to the housing (1). The end face of the bearing locking ring (7) is in contact with the end face of the outer ring of the bearing 6.

7. The rotary reducer for limiting the output rotation angle by limiting the number of spindle rotations as described in claim 1, characterized in that: A gear ring (21) is provided on the output end (2), and the gear ring (21) meshes with the worm gear (31) on the main shaft (3) for transmission.

8. The rotary reducer for limiting the output rotation angle by limiting the number of spindle rotations as described in claim 1, characterized in that: A sliding bearing sleeve (23) is installed between the output end (2) and the housing (1), and the output end (2) is rotatably connected to the housing (1) through the sliding bearing sleeve (23).

9. The rotary reducer for limiting the output rotation angle by limiting the number of spindle rotations according to claim 1, characterized in that: A bearing 2 (61) is installed between the output end (2) and the housing (1), and the output end (2) is rotatably connected to the housing (1) through the bearing 2 (61).

10. The rotary reducer for limiting the output rotation angle by limiting the number of spindle rotations as described in claim 6 or 8, characterized in that: It also includes a skeleton oil seal (13), which is provided between the housing (1) and the output end (2). The skeleton oil seal (13) is located on the outside of the sliding bearing sleeve (23). The skeleton oil seal (13) is provided between the main shaft (3) and the housing (1). The skeleton oil seal (13) is located on the outside of the bearing (6).

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