Worm and gear speed reducer with overload protection mechanism

Abstract

The utility model discloses a worm and gear speed reducer with an overload protection mechanism, and relates to the technical field of speed reducers. According to the worm and gear speed reducer with the overload protection mechanism, by arranging the rotating block, the mounting base, the mounting plate, the rotating plate, the first sliding groove, a connecting column, a fixing plate, a gear, a rotating shaft, gear teeth and a mounting shaft, the overload protection function is achieved, when the load exceeds a set value, the connecting column slides along the polygonal sliding groove, the rotating plate is disengaged from the mounting plate, and the overload protection function is achieved. Therefore, power transmission is cut off, the worm gear and the worm are prevented from being damaged due to overload, operation can be recovered only by continuously connecting the fixing plate and the mounting shaft, maintenance is easy and convenient, and downtime is shortened.

Description

Technical Field

[0001] This utility model relates to the field of speed reducer technology, specifically a worm gear reducer with an overload protection mechanism. Background Technology

[0002] A speed reducer is an independent, closed transmission device between a prime mover and a driven machine. It is used to reduce speed and increase torque to meet work requirements. Speed ​​reducers are generally used in low-speed, high-torque transmission equipment. They reduce the speed of a motor, internal combustion engine, or other high-speed power source by meshing a gear with fewer teeth on the input shaft with a larger gear on the output shaft. Ordinary speed reducers may also have several pairs of gears operating on the same principle to achieve the desired speed reduction effect. The ratio of the number of teeth on the large and small gears is the transmission ratio. During the use of a speed reducer, the output shaft may become overloaded due to excessive resistance. If the speed reducer continues to drive the output shaft to rotate, it will cause damage to internal parts such as gears, and in severe cases, it may even cause the motor to burn out.

[0003] Therefore, Chinese Patent Publication No. CN 219605974 U3 proposes a speed reducer with an overload protection structure, relating to the field of speed reducer technology, including a mounting box and an output assembly; the mounting box: houses the speed reducer assembly; the output assembly: includes an output shaft, a connecting box, and a support frame. The mounting box has a mounting hole on its left side, through which the output shaft is rotatably connected. The connecting box has a connecting hole on its right side, through which the left end of the output shaft is rotatably connected. A support frame is fixed to the lower side of the connecting box, with its lower end fixed to the left side of the mounting box. A protection assembly is installed inside the connecting box, and a connecting assembly is installed on the left side of the connecting box. Furthermore, the speed reducer assembly includes a rotating tube, a connecting groove, a worm gear ring, and a worm, which can automatically separate from the output shaft when overload occurs due to excessive resistance, preventing further damage to the speed reducer due to overload.

[0004] However, when the reducer with overload protection structure is in use, it relies on the break bar as the core component of overload protection. Its fracture threshold is easily affected by factors such as material fatigue and temperature changes, which may lead to false triggering or failure. Moreover, it needs to be replaced manually after breaking, resulting in high maintenance costs, thus causing defects in the use of the device. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a worm gear reducer with an overload protection mechanism to solve the problems mentioned in the background section.

[0006] When the reducer with overload protection structure is in use, it relies on the fracture bar as the core component of overload protection. Its fracture threshold is easily affected by factors such as material fatigue and temperature changes, which may lead to false triggering or failure. Moreover, it needs to be replaced manually after breaking, resulting in high maintenance costs and thus defects in the use of the device.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A worm gear reducer with an overload protection mechanism includes a reducer body. A mounting shaft is provided on one side of the reducer body. A protective cylinder is detachably connected to one side of the reducer body, outside the mounting shaft. A mounting base is detachably connected to the end of the protective cylinder away from the reducer body. A drive motor is detachably connected to the side of the mounting base away from the protective cylinder. A rotating block is rotatably connected to one side of the mounting base. A mounting plate is fixedly connected to one side of the rotating block via a fixing column. A rotating plate is rotatably connected to one side of the mounting plate. A polygonal groove is formed on one side of the mounting plate. A connecting column is slidably connected inside the polygonal groove. A fixing plate is fixedly connected to the outside of the connecting column. A first groove penetrating the surface of the rotating plate is formed on one side of the rotating plate. The outside of the connecting column is slidably connected to the first groove.

[0009] Preferably, one side of the rotating block has an irregularly shaped connecting hole that penetrates its surface, and one side of the drive motor has a motor output shaft. The irregularly shaped connecting hole and the motor output shaft are used in conjunction.

[0010] Preferably, a rotating shaft is rotatably connected to one side of the mounting plate, and a gear is fixedly connected to the outer side of the rotating shaft.

[0011] Preferably, a mounting bracket is fixedly connected to one side of the rotating block, and a servo motor is fixedly connected to one side of the mounting bracket.

[0012] Preferably, one end of the rotating shaft passes through one side of the mounting bracket and is fixedly connected to the output end of the servo motor.

[0013] Preferably, one side of the rotating plate is provided with multiple gear teeth.

[0014] Preferably, the gear engages with the gear teeth in a primary engagement.

[0015] This utility model provides a worm gear reducer with an overload protection mechanism. Compared with the prior art, it has the following advantages:

[0016] This worm gear reducer with overload protection mechanism achieves overload protection by setting up a rotating block, mounting base, mounting plate, rotating plate, first slide groove, connecting column, fixed plate, gear, rotating shaft, gear teeth, and mounting shaft. When the load exceeds the set value, the connecting column slides along the polygonal slide groove, causing the rotating plate to disengage from the mounting plate, thereby cutting off power transmission and preventing damage to the worm gear due to overload. Afterwards, simply reconnecting the fixed plate and mounting shaft will restore operation, simplifying maintenance and reducing downtime. Attached Figure Description

[0017] Figure 1 For the explosion of this utility model Figure 1 .

[0018] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 .

[0019] Figure 3 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 .

[0020] Figure 4 For the explosion of this utility model Figure 2 .

[0021] Figure 5 For the explosion of this utility model Figure 3 .

[0022] Figure 6 This is an enlarged structural diagram of part A in this utility model.

[0023] In the diagram: 1. Reducer body; 2. Drive motor; 3. Mounting base; 4. Motor output shaft; 5. Irregularly shaped connecting hole; 6. Rotating block; 7. Mounting plate; 8. Rotating plate; 9. First slide groove; 10. Connecting column; 11. Fixing plate; 12. Gear; 13. Rotating shaft; 14. Gear tooth; 15. Mounting shaft; 16. Protective cylinder; 17. Servo motor; 18. Mounting bracket; 19. Polygonal slide groove. Detailed Implementation

[0024] 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.

[0025] Please see Figures 1-6This utility model provides a technical solution: a worm gear reducer with an overload protection mechanism, comprising a reducer body 1, a mounting shaft 15 on one side of the reducer body 1, a protective cylinder 16 detachably connected to one side of the reducer body 1 and outside the mounting shaft 15, the protective cylinder 16 being bolted to the reducer body 1, a mounting base 3 detachably connected to the end of the protective cylinder 16 away from the reducer body 1, the mounting base 3 being bolted to the protective cylinder 16, a drive motor 2 detachably connected to the side of the mounting base 3 away from the protective cylinder 16, the drive motor 2 being bolted to the mounting base 3, a rotating block 6 rotatably connected to one side of the mounting base 3, and a fixed post fixing one side of the rotating block 6. A mounting plate 7 is attached, and the rotating block 6 rotates, causing the mounting plate 7 to rotate as well. A rotating plate 8 is rotatably connected to one side of the mounting plate 7, and a certain distance is maintained between the mounting plate 7 and the rotating plate 8. A polygonal groove 19 is provided on one side of the mounting plate 7, and a connecting post 10 is slidably connected inside the polygonal groove 19. The connecting post 10 moves along the inside of the polygonal groove 19. A fixing plate 11 is fixedly connected to the outside of the connecting post 10, and the movement of the connecting post 10 causes the fixing plate 11 to move as well. A first groove 9 penetrating the surface of the rotating plate 8 is provided on one side, and the rotation of the rotating plate 8 causes the first groove 9 to rotate as well. The outside of the connecting post 10 is slidably connected to the first groove 9, and the rotation of the first groove 9 causes the connecting post 10 to move as well.

[0026] Furthermore, a shaped connecting hole 5 is provided on one side of the rotating block 6, and a motor output shaft 4 is provided on one side of the drive motor 2. The shaped connecting hole 5 and the motor output shaft 4 are used together. The shape and size of the motor output shaft 4 match the shaped connecting hole 5. After the motor output shaft 4 enters the shaped connecting hole 5, it rotates and drives the rotating block 6 to rotate.

[0027] Furthermore, a rotating shaft 13 is rotatably connected to one side of the mounting plate 7, and a gear 12 is fixedly connected to the outside of the rotating shaft 13. The rotating shaft 13 rotates, causing the gear 12 to rotate.

[0028] Furthermore, a mounting bracket 18 is fixedly connected to one side of the rotating block 6, and a servo motor 17 is fixedly connected to one side of the mounting bracket 18, so as to better install the servo motor 17.

[0029] Furthermore, one end of the rotating shaft 13 passes through one side of the mounting bracket 18 and is fixedly connected to the output end of the servo motor 17. The rotation of the servo motor 17 causes the rotating shaft 13 to rotate.

[0030] Furthermore, one side of the rotating plate 8 is provided with multiple gear teeth 14, which rotate to make the rotating plate 8 rotate.

[0031] Furthermore, gear 12 engages with gear tooth 14, and the rotation of gear 12 causes gear tooth 14 to rotate as well.

[0032] In use, the drive motor 2 is mounted on one side of the mounting base 3, so that the motor output shaft 4 passes through the irregular connecting hole 5 and connects to the rotating block 6. When the drive motor 2 rotates with the motor output shaft 4, the motor output shaft 4 will rotate with the rotating block 6. The servo motor 17 is turned on, and the servo motor 17 drives the gear 12 to rotate through the rotating shaft 13. The gear 12 drives the rotating plate 8 to rotate through the gear teeth 14. The rotation of the rotating plate 8 drives the first slide groove 9 to rotate. When the first slide groove 9 rotates, it moves the connecting column 10. The connecting column 10 moves the fixing plate 11 along the polygonal slide groove 19. As the connecting column 10 moves along with the fixing plate 11, the side of the fixing plate 11 away from the connecting column 10 gradually approaches the mounting shaft 15 until one side of the fixing plate 11 contacts the outer side of the mounting shaft 15, thus fixing the rotating block 6 to the mounting shaft 15. This allows the rotating block 6 to rotate along with the mounting shaft 15. When the machine is overloaded, the servo motor 17 is activated, causing one side of the fixing plate 11 to separate from the mounting shaft 15, thus loosening the connection between the mounting shaft 15 and the rotating block 6. After separation, the worm gear and worm inside the reducer body 1 can be prevented from being damaged due to machine overload.

[0033] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A worm and gear speed reducer with an overload protection mechanism, comprising a speed reducer main body (1), characterized in that: The side of the speed reducer body (1) is provided with a mounting shaft (15), and the side of the speed reducer body (1) and outside the mounting shaft (15) is detachably connected with a protective cylinder (16), and the end of the protective cylinder (16) away from the speed reducer body (1) is detachably connected with a mounting seat (3), and the side of the mounting seat (3) away from the protective cylinder (16) is detachably connected with a driving motor (2), and the side of the mounting seat (3) is rotatably connected with a rotating block (6), and the side of the rotating block (6) is fixedly connected with a mounting plate (7) through a fixed column, and the side of the mounting plate (7) is rotatably connected with a rotating plate (8), and the side of the mounting plate (7) is provided with a polygonal sliding groove (19), and the inside of the polygonal sliding groove (19) is slidably connected with a connecting column (10), and the outside of the connecting column (10) is fixedly connected with a fixed plate (11), and the side of the rotating plate (8) is provided with a first sliding groove (9) penetrating through the surface thereof, and the outside of the connecting column (10) is slidably connected with the first sliding groove (9).

2. The worm gear speed reducer with overload protection mechanism according to claim 1, characterized in that: The side of the rotating block (6) is provided with a special-shaped connecting hole (5) penetrating through the surface thereof, and the side of the driving motor (2) is provided with a motor output shaft (4), and the special-shaped connecting hole (5) and the motor output shaft (4) are used in cooperation.

3. The worm gear speed reducer with overload protection mechanism according to claim 1, characterized in that: The side of the mounting plate (7) is rotatably connected with a rotating shaft (13), and the outside of the rotating shaft (13) is fixedly connected with a gear (12).

4. The worm gear speed reducer with overload protection mechanism according to claim 3, characterized in that: The side of the rotating block (6) is fixedly connected with a mounting frame (18), and the side of the mounting frame (18) is fixedly connected with a servo motor (17).

5. The worm gear speed reducer with overload protection mechanism according to claim 4, characterized in that: The end of the rotating shaft (13) is fixedly connected with the output end of the servo motor (17) through the side of the mounting frame (18).

6. The worm gear speed reducer with overload protection mechanism according to claim 3, characterized in that: The side of the rotating plate (8) is provided with a plurality of gear teeth (14).

7. The worm gear speed reducer with overload protection mechanism according to claim 6, characterized in that: The gear (12) is meshedly connected with the gear teeth (14).

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