Belt wheel belt anti-off mechanism

Abstract

The utility model discloses a kind of belt wheel belt anti-off mechanisms, including anti-off mechanism, the anti-off mechanism includes connecting frame, connecting rod and connecting column, the connecting rod is installed on the connecting frame, the connecting column is equipped with connecting hole, the connecting rod is arranged in the connecting hole, the connecting column outer wall can be contacted with the belt of belt wheel, the connecting frame is fixedly connected to external device, adjusting device for adjusting the distance between the connecting rod and the belt wheel is equipped on the connecting frame, the utility model has the beneficial effect that: the distance between connecting rod and belt wheel is adjusted by adjusting device, so that the vibration of belt transmission mechanism when acting can be contacted with connecting column, the disengagement between belt and belt wheel can be prevented by connecting column, the distance between connecting column and belt wheel is adjusted according to the difference of rotational speed, so as to improve the application range of anti-off mechanism.

Description

Technical Field

[0001] This utility model relates to the field of belt anti-derailment mechanism for pulleys. Background Technology

[0002] Belt drive is a common transmission method. During operation, the belt will vibrate, and when the belt vibrates, it is easy for it to come off the pulley. Therefore, it is necessary to tighten the belt or use other auxiliary pulleys to prevent the belt from coming off the pulley.

[0003] In the prior art, such as the automatic tension-adjusting crankshaft pulley provided by Chinese Utility Model (authorization announcement number: CN223227801U), the device is equipped with a hydraulic support arm, a movable support arm, a pressure-sensitive shaft seat, and a pressure-adjusting auxiliary wheel. This allows the device to measure the real-time tension of the transmission belt through the pressure on the pressure-sensitive shaft seat, and adjust the tension of the transmission belt through the pressure-adjusting auxiliary wheel, thereby improving internal safety. However, the drawback of the above-mentioned prior art is that it has a complex structure and high cost.

[0004] Therefore, it is necessary to improve the existing technology. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings and deficiencies of the existing technology by providing a pulley belt anti-derailment mechanism, which has the advantages of simple structure and low cost.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A belt anti-derailment mechanism for a pulley includes an anti-derailment mechanism comprising a connecting frame, a connecting rod, and a connecting column. The connecting rod is mounted on the connecting frame, and the connecting column has a connecting hole through which the connecting rod passes. The outer peripheral wall of the connecting column can contact the belt of the pulley. The connecting frame is fixedly connected to an external device, and the connecting frame is provided with an adjustment device for adjusting the distance between the connecting rod and the pulley.

[0007] Furthermore, the adjusting device includes an adjusting bolt and a slider. The connecting frame is provided with a sliding groove, the slider is slidably fitted in the sliding groove, the adjusting bolt is rotatably connected to the connecting frame, the slider is threadedly connected to the outer periphery of the adjusting bolt, and the connecting column is fixedly connected to the slider.

[0008] Furthermore, the upper end of the connecting rod is provided with a limiting plate that cooperates with the connecting column, and an elastic element is provided between the connecting column and the slider. The elastic element always has the tendency to push the connecting column to cooperate with the limiting plate.

[0009] Furthermore, the connecting column is provided with a groove for accommodating the limiting plate.

[0010] Furthermore, a retaining spring is provided on the outer periphery of the connecting rod, and the retaining spring is disposed between the limiting plate and the connecting post.

[0011] Furthermore, the connecting post is provided with a connecting cavity, which is used for positioning and installing the elastic element.

[0012] Furthermore, both the connecting hole and the connecting rod have non-circular cross-sections, and they are identical in shape to achieve anti-rotation fit.

[0013] The beneficial effects of this utility model after adopting the above structure are as follows: The belt anti-derailment mechanism of this utility model adjusts the distance between the connecting rod and the pulley by adjusting the adjusting device, so that the belt vibration can contact the connecting post when the belt drive mechanism is in operation. The connecting post can prevent the belt from separating from the pulley. The distance between the connecting post and the pulley can be adjusted according to the different speeds, thereby increasing the applicability of the anti-derailment mechanism. Attached Figure Description

[0014] To more clearly illustrate the specific embodiments of this utility model, the accompanying drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Fig. 1 This is a three-dimensional structural schematic diagram of the present invention; Fig. 2 This is the cross-sectional structure of this utility model; Fig. 3 This is a three-dimensional structural diagram of the connecting rod and retaining ring of this utility model.

[0016] Figs. 1-3 The winning number is: 1. Belt drive mechanism; 21. Connecting frame; 22. Connecting rod; 220. Slot; 221. Limiting plate; 210. Slide groove; 23. Connecting column; 230. Groove; 24. Elastic element; 25. Slider; 26. Snap ring; 31. Adjusting bolt; 32. Locking nut. Detailed Implementation

[0017] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention 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 invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0018] It should be noted that in this utility model, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly for better describing this utility model and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0019] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] like Figs. 1-3 As shown, a belt anti-derailment mechanism for a pulley includes a belt drive assembly and an anti-derailment mechanism. The anti-derailment mechanism includes a connecting frame 21, a connecting rod 22, and a connecting post 23. The connecting rod 22 is mounted on the connecting frame 21. The connecting post 23 has a connecting hole, and the connecting rod 22 passes through the connecting hole. The connecting hole and the connecting rod 22 both have non-circular fitted cross-sections, and their shapes are identical to achieve anti-rotation fit. Therefore, the connecting post 23 can only slide along the axial direction of the connecting rod 22 and cannot rotate around the axial direction of the connecting rod 22. This reduces wear caused by rotation of the connecting post 23 and improves its service life. The outer peripheral wall of the connecting post 23 can engage with the belt of the pulley. When the belt drive assembly operates, the belt vibrates, and the contact between the connecting post 23 and the belt prevents the belt from directly separating from the pulley. The connecting frame 21 is fixedly connected to an external device, which can be any structure that requires a belt drive assembly, such as the bottom of a lawnmower (the mowing assembly at the bottom of the lawnmower needs to drive the mowing blade through the belt drive assembly) or a belt drive assembly detection platform. The connecting frame 21 is equipped with an adjustment device for adjusting the distance between the connecting rod 22 and the pulley. Since the frequency and amplitude of vibration of the belt drive assembly increase with different rotation speeds when it operates, the distance between the connecting post 23 and the pulley can be adjusted according to different rotation speeds to improve the applicability of the anti-detachment mechanism.

[0021] The adjusting device includes an adjusting bolt 31, a slider 25, and two locking nuts 32. The connecting frame 21 is provided with a sliding groove 210. The slider 25 is slidably engaged in the sliding groove 210, and the slider 25 can only slide within the sliding groove 210. The slider 25 will not rotate around the axial direction of the adjusting bolt 31. The adjusting bolt 31 is rotatably connected to the connecting frame 21. The slider 25 is threadedly connected to the outer circumference of the adjusting bolt 31. The connecting post 23 is fixedly connected to the slider 25. By rotating the adjusting bolt 31, the slider 25 is driven to slide within the sliding groove 210. The locking nuts 32 are both threadedly engaged with the outer circumference of the adjusting bolt 31, and the two locking nuts 32 achieve the function of locking the adjusting bolt 31.

[0022] The upper end of the connecting rod 22 is provided with a limiting plate 221 that cooperates with the connecting post 23. An elastic element 24 is provided between the connecting post 23 and the slider 25. In this embodiment, the elastic element 24 is a spring. The elastic element 24 always has the tendency to push the connecting post 23 to cooperate with the limiting plate 221. The elastic element 24 plays a role in shock absorption. Since the lawnmower will vibrate under the action of the engine when it starts, the spring can make the connecting post 23 slide adaptively along the direction of the connecting rod 22, thereby causing the connecting post 23 to vibrate excessively and detach.

[0023] The connecting rod 22 is provided with a retaining spring 26 on its outer periphery, and a retaining groove 220 corresponding to the retaining spring 26 is provided on the outer periphery of the connecting rod 22. The retaining spring 26 is disposed between the limiting plate 221 and the connecting post 23. The connecting post 23 is provided with a groove 230, which is used to accommodate the limiting plate 221 and the retaining spring 26. The retaining spring 26 can further improve the stability of the connection between the connecting post 23 and the connecting rod 22. Furthermore, by accommodating the limiting plate 221 and the retaining spring 26 in the groove 230, it is possible to prevent the retaining spring 26 from separating from the connecting rod 22 during vibration. In a further optimization, the connecting post 23 is provided with a connecting cavity, which is used to position and install the elastic element 24, thus enabling more convenient and accurate installation of the elastic element 24.

[0024] During actual assembly: First, the connecting frame 21 is fixed to the preset installation position of the external equipment by bolting or welding, ensuring that the relative position of the connecting frame 21 and the pulley meets the subsequent adjustment requirements and is securely installed. Next, the slider 25 is embedded into the groove 210 of the connecting frame 21, and the adjusting bolt 31 is rotatably connected to the connecting frame 21, with the slider 25 threadedly engaged with the adjusting bolt 31, completing the initial assembly of the adjustment device. Then, the elastic element 24 (such as a compression spring) is placed into the connecting cavity of the connecting column 23 for positioning, and the connecting hole of the connecting column 23 is aligned with the lower end of the connecting rod 22 and inserted. Because the connecting hole and the cross-section of the connecting rod 22 are non-circular, the connecting column 23 can only slide axially along the connecting rod 22 and cannot rotate relative to it. Then, the connecting rod 22 is fixedly installed on the slider 25. Afterwards, the connecting rod 22... A retaining ring 26 is installed between the lower part of the outer limiting plate 221 and the top of the connecting column 23, ensuring that the retaining ring 26 engages with the corresponding slot 220 of the connecting rod 22. This allows the limiting plate 221 and the slot 220 to be housed in the groove 230 at the top of the connecting column 23. At this time, the elastic element 24 is in a compressed state, always tending to push the connecting column 23 towards the limiting plate 221. Finally, rotating the adjusting bolt 31 causes the slider 25 to slide along the slide groove 210 until the outer peripheral wall of the connecting column 23 maintains an appropriate distance from the belt on the pulley, allowing the belt to contact the connecting column 23 during vibration. Subsequently, the adjusting bolt 31 is locked by adjusting the two locking nuts 32 to suppress unexpected rotation of the adjusting bolt 31 caused by vibration during the operation of the belt drive mechanism 1, completing the assembly of the entire anti-detachment mechanism. After assembly, the distance between the connecting column 23 and the pulley can be finely adjusted again by adjusting the adjusting bolt 31 according to the actual operating speed of the belt drive assembly to adapt to the anti-detachment requirements under different vibration amplitudes.

[0025] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this utility model.

Claims

1. A belt anti-derailment mechanism for pulleys, characterized in that: The device includes an anti-detachment mechanism, which includes a connecting frame (21), a connecting rod (22), and a connecting column (23). The connecting rod (22) is mounted on the connecting frame (21). The connecting column (23) has a connecting hole, and the connecting rod (22) passes through the connecting hole. The outer peripheral wall of the connecting column (23) can contact the belt of the pulley. The connecting frame (21) is fixedly connected to an external device. The connecting frame (21) is provided with an adjustment device for adjusting the distance between the connecting rod (22) and the pulley.

2. The belt anti-derailment mechanism for pulleys according to claim 1, characterized in that: The adjusting device includes an adjusting bolt (31) and a slider (25). The connecting frame (21) is provided with a groove (210). The slider (25) is slidably fitted in the groove (210). The adjusting bolt (31) is rotatably connected to the connecting frame (21). The slider (25) is threadedly connected to the outer periphery of the adjusting bolt (31). The connecting column (23) is fixedly connected to the slider (25).

3. The belt anti-derailment mechanism for pulleys according to claim 2, characterized in that: The upper end of the connecting rod (22) is provided with a limiting plate (221) that cooperates with the connecting column (23). An elastic element (24) is provided between the connecting column (23) and the slider (25). The elastic element (24) always has the tendency to push the connecting column (23) to cooperate with the limiting plate (221).

4. The belt anti-derailment mechanism for pulleys according to claim 3, characterized in that: The connecting column (23) is provided with a groove (230), which is used to accommodate the limiting plate (221).

5. A belt anti-derailment mechanism for a pulley according to claim 4, characterized in that: The connecting rod (22) is provided with a retaining ring (26) on its outer periphery, and the retaining ring (26) is disposed between the limiting plate (221) and the connecting post (23).

6. The belt anti-derailment mechanism for pulleys according to claim 3, characterized in that: The connecting column (23) is provided with a connecting cavity, which is used to position and install the elastic element (24).

7. A belt anti-derailment mechanism for a pulley according to claim 1, characterized in that: The cross-sections of the connecting hole and the connecting rod (22) are both non-circular fitting cross-sections, and the two have the same shape to achieve anti-rotation fit.

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