Overload protection device
By designing a compact overload protection device, utilizing threaded connections and a retractable ball plunger, the problems of large space and high cost of existing overload protection mechanisms are solved, achieving effective motor protection for small-space, low-cost equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-04-03
AI Technical Summary
Existing overload protection mechanisms are space-consuming and costly, making them unsuitable for use in small, low-cost devices.
An overload protection device was designed, including components such as a main mounting bracket, drive shaft, driven shaft, transmission belt, sliding seat, connecting plate, track seat, inner guide rail, push plate, and detection sensor. The device achieves a compact structure by using threaded connections and a retractable ball plunger, thereby reducing space occupation and production costs.
It reduces the space occupied by the overall structure, lowers production and maintenance costs, and achieves effective protection for the drive motor.
Smart Images
Figure CN224083373U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of overload protection technology, and in particular relates to an overload protection device. Background Technology
[0002] With the increasing use of automated equipment across various fields, drive mechanisms require overload protection for the drive motors to prevent damage and unnecessary cost and time losses due to overload at the working end. Most existing overload protection mechanisms combine torque limiters and origin detection sensors. The principle is that when the load is overloaded, the torque limiter disconnects from the power source, the detection sensor sends a signal to the PLC, and the PLC disconnects the motor power supply, thus protecting the power source. Figure 4 As shown, existing overload protection mechanisms are too large and expensive to be used properly for small-space, low-cost equipment.
[0003] Therefore, we need to design an overload protection device to solve these problems. Utility Model Content
[0004] The problem this invention aims to solve is to provide an overload protection device.
[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:
[0006] An overload protection device includes a main mounting frame, on which a drive shaft and a driven shaft are rotatably mounted. The drive shaft and the driven shaft are connected by a transmission belt. A sliding seat is slidably mounted on the main mounting frame above the transmission belt and is connected to the transmission belt. A connecting plate is mounted on the sliding seat, and a track seat is mounted on the free end of the connecting plate. An inner guide rail is slidably mounted on the track seat, and a push plate is mounted on the free end of the inner guide rail. A slot is provided on the side wall of the inner guide rail. A telescopic column is also mounted on the track seat, with one end of the telescopic column inserted into the slot. A drive motor is fixedly mounted on the main mounting frame at one end of the drive shaft and is connected to the drive shaft. A detection sensor is also mounted on the connecting plate on one side of the track seat and is connected to the drive motor.
[0007] Preferably, the track seat is provided with a mounting hole, one end of the telescopic column passes through the mounting hole and is inserted into the slot, and a locking nut is fitted on the telescopic column located outside the mounting hole, and the locking nut and the mounting hole are connected to the telescopic column by thread engagement.
[0008] This configuration, using threads to connect the telescopic column to the lock nut and mounting hole, enables adjustment and locking of the telescopic column's mounting position.
[0009] Preferably, the telescopic column inserted into the slot has a telescopic hole at its end, and a spring and a ball are provided in the telescopic hole. One end of the spring is in contact with the ball and the other end is connected to the inner wall of the telescopic hole.
[0010] This design allows the inner guide rail to be released when the push plate is blocked, preventing damage caused by impact.
[0011] Preferably, the opening end of the telescopic hole is further provided with a limiting ring, and the diameter of the ball does not exceed the inner diameter of the mounting hole, and the inner diameter of the limiting ring does not exceed the diameter of the ball.
[0012] This design prevents the balls from coming out of the telescopic hole.
[0013] Preferably, the detection sensor is fixedly connected to the connecting plate via a sensor mounting bracket.
[0014] This setup allows for both fixing the detection sensor and adjusting its installation height to match the inner track.
[0015] The advantages and positive effects of this utility model are:
[0016] This invention improves the installation position of the drive motor, reducing the overall space occupied by the structure; by setting a track seat on the connecting plate, the push plate is made movable by using the inner guide rail and the retractable ball plunger, resulting in a simple overall structure and reduced production and maintenance costs. Attached Figure Description
[0017] 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.
[0018] Figure 1 This is an isometric schematic diagram of the overall structure of this utility model;
[0019] Figure 2 This is a cross-sectional schematic diagram of the internal structure of the track seat of this utility model;
[0020] Figure 3 yes Figure 3 Enlarged view of the structure at point A in the diagram
[0021] Figure 4 This is an isometric schematic diagram of an existing overload protection mechanism.
[0022] The annotations in the attached figures are explained as follows:
[0023] 1. Connecting plate; 2. Push plate; 3. Rail guide seat; 4. Drive motor; 5. Sensor mounting bracket; 6. Inner guide rail; 7. Telescopic column; 8. Detection sensor; 9. Locking nut; 10. Main mounting bracket; 11. Drive shaft; 12. Drive synchronous pulley; 13. Driven synchronous shaft; 14. Driven shaft; 15. Drive belt; 16. Slide rail; 17. Sliding seat; 18. Ball bearing; 19. Telescopic hole; 20. Spring; 21. Slot; 22. Mounting hole; 23. Limit ring. Detailed Implementation
[0024] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0026] The present invention will be further described below with reference to the accompanying drawings:
[0027] Example 1: As Figures 1-3As shown, an overload protection device includes a main mounting frame 10. A drive shaft 11 and a driven shaft 14 are rotatably mounted on the main mounting frame 10. A drive synchronous pulley 12 is mounted on the drive shaft 11, and a driven synchronous pulley is mounted on the driven shaft 14. The drive synchronous pulley 12 and the driven synchronous pulley are connected by a transmission belt. A sliding seat 17 is slidably mounted on the main mounting frame 10 above the transmission belt. The sliding seat 17 is connected to the transmission belt. A connecting plate 1 is mounted on the sliding seat 17. A track seat is mounted on the free end of the connecting plate 1. An inner guide rail 6 is slidably mounted on the track seat. A push plate 2 is mounted on the free end of the inner guide rail 6. A slot 21 is provided on the side wall of the inner guide rail 6. A telescopic column 7 is also mounted on the track seat. One end of the telescopic column 7 is inserted into the slot 21. A drive motor 4 is fixedly mounted on the main mounting frame 10 at one end of the drive shaft 11. The drive motor 4 is connected to the drive shaft 11. A detection sensor 8 is also mounted on the connecting plate 1 on one side of the track seat. The detection sensor 8 is connected to the drive motor 4.
[0028] Specifically, the track base is provided with a mounting hole 22. One end of the telescopic column 7 passes through the mounting hole 22 and is inserted into the slot 21. A locking nut 9 is fitted on the telescopic column 7 located outside the mounting hole 22. The locking nut 9, the mounting hole 22 and the telescopic column 7 are connected to each other by threads. This arrangement uses threads to connect the telescopic column 7 with the locking nut 9 and the mounting hole 22 to achieve adjustment and locking of the installation position of the telescopic column 7.
[0029] Specifically, the telescopic column 7 inserted into the slot 21 has a telescopic hole 19 at its end. A spring 20 and a ball bearing 18 are installed in the telescopic hole 19. One end of the spring 20 is in contact with the ball bearing 18 and the other end is connected to the inner wall of the telescopic hole 19. This arrangement allows the inner guide rail 6 to be released when the push plate 2 is blocked, thus avoiding damage caused by impact.
[0030] Specifically, a limiting ring 23 is provided at the opening end of the telescopic hole 19, and the diameter of the ball 18 does not exceed the inner diameter of the mounting hole 22, and the inner diameter of the limiting ring 23 does not exceed the diameter of the ball 18. This arrangement can prevent the ball 18 from coming out of the telescopic hole 19.
[0031] Specifically, the detection sensor 8 is fixedly connected to the connecting plate 1 via the sensor mounting bracket 5. This arrangement not only fixes the detection sensor 8 but also allows for adjustment of the installation height of the detection sensor 8 to match the inner track.
[0032] The working process of this embodiment: Refer to Figure 2To explain, during operation, the drive motor 4 drives the drive shaft 11 to rotate. The rotation of the drive shaft 11 then drives the drive synchronous pulley 12, which is fixed to the drive shaft 11, to rotate. With the cooperation of the driven synchronous pulley on the driven shaft 14, the transmission belt drives the sliding seat 17 to move along the slide rail 16. When the push plate 2 moves to its limit position with the sliding seat 17, it is blocked. At this point, the push plate 2 stops moving and applies a reverse force to the inner guide rail 6. Meanwhile, the sliding seat 17 drives the connecting plate 1 to continue moving. Figure 4 As shown, as the track seat continues to move, the ball bearing 18, which is inserted into the slot 21 on the inner guide rail 6, will move outward along the side wall of the slot 21. While moving, the ball bearing 18 will squeeze the spring 20. When the ball bearing 18 is removed from the slot 21, the inner guide rail 6 will extend out of the track seat under the reverse force applied by the push rod. The extended inner guide rail 6 will block the output end of the detection sensor 8. After the output end of the detection sensor 8 is blocked, it will send a signal to stop the drive motor 4 from outputting.
[0033] The above description details one embodiment of the present utility model, but it is merely a preferred embodiment and should not be construed as limiting the scope of the present utility model. All equivalent variations and improvements made within the scope of the present utility model application should still fall within the patent coverage of the present utility model.
Claims
1. An overload protection device, comprising a main mounting frame (10), a driving shaft (11) and a driven shaft (14) are rotatably arranged on the main mounting frame (10), the driving shaft (11) and the driven shaft (14) are connected through a transmission belt, a sliding seat (17) is slidably arranged on the main mounting frame (10) above the transmission belt, the sliding seat (17) is connected with the transmission belt, a connecting plate (1) is arranged on the sliding seat (17), characterized in that: The free end of the connecting plate (1) is provided with a track seat, an inner guide rail (6) is slidably arranged on the track seat, the free end of the inner guide rail (6) is provided with a push plate (2), a clamping groove (21) is arranged on the side wall of the inner guide rail (6), an extension column (7) is further arranged on the track seat, one end of the extension column (7) is inserted into the clamping groove (21), a driving motor (4) is fixedly arranged on the main mounting frame (10) of one end of the driving shaft (11), the driving motor (4) is connected with the driving shaft (11), a detection sensor (8) is further arranged on the connecting plate (1) on one side of the track seat, and the detection sensor (8) is connected with the driving motor (4).
2. An overload protection device according to claim 1, characterised in that: The track seat is provided with a mounting hole (22), one end of the extension column (7) is inserted into the clamping groove (21) from the mounting hole (22), a locking nut (9) is sleeved on the extension column (7) outside the mounting hole (22), and the locking nut (9) and the mounting hole (22) are connected with the extension column (7) through thread cooperation.
3. An overload protection device according to claim 2, characterised in that: The end of the extension column (7) inserted into the clamping groove (21) is provided with an extension hole (19), a spring (20) and a ball (18) are arranged in the extension hole (19), one end of the spring (20) is in contact with the ball (18) and the other end is connected with the inner wall of the extension hole (19).
4. An overload protection device according to claim 3, characterised in that: The opening end of the extension hole (19) is further provided with a limiting ring (23), the diameter of the ball (18) is not more than the inner diameter of the mounting hole (22), and the inner diameter of the limiting ring (23) is not more than the diameter of the ball (18).
5. An overload protection device according to claim 1, characterized in that: The detection sensor (8) is fixedly connected with the connecting plate (1) through a sensor mounting frame (5).