Synchronous belt tension force automatic adjusting device
By using a rolling shaft parallel to the synchronous belt in the synchronous belt tensioning device, the transmission wheel automatically adjusts the tension through the spring force, solving the problem of large space occupation of existing devices and realizing automatic adjustment of synchronous belt tension and optimization of space utilization.
Patent Information
- Application Number
- CN202423288077.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-12-30
AI Technical Summary
Existing synchronous belt tensioning devices occupy a large amount of space, and there is a lack of solutions to optimize space utilization.
By optimizing the power transmission direction between the drive wheel and the spring, and by using a rolling shaft and a synchronous belt arranged in parallel, the drive wheel automatically adjusts its tension through the spring force, reducing the space occupied by the device.
It achieves automatic adjustment of synchronous belt tension, optimizes space utilization, and reduces frictional loss between the drive pulley and the synchronous belt.
Smart Images
Figure CN223536863U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of synchronous belt auxiliary applications, specifically relating to an automatic tension adjustment device for synchronous belts. Background Technology
[0002] Synchronous belts are mechanical components widely used in industrial equipment, enabling precise synchronous transmission. In many applications, the use of synchronous belts is crucial. Compared to traditional linkage and gear mechanisms, using synchronous belts can significantly reduce machine noise and vibration while increasing operating speed.
[0003] However, since timing belts are typically made of elastic materials such as rubber or polyurethane, they may loosen after prolonged stress. To address this issue, an external tensioning device can be installed to adjust the tension of the timing belt, ensuring it maintains appropriate tension and preventing mechanical transmission errors caused by loosening, thereby ensuring the stability and accuracy of the transmission system.
[0004] In existing technologies, tensioning devices can include at least a tensioning roller and a spring. The spring is positioned opposite and perpendicular to the outer surface of the timing belt. The spring's elastic force presses against the tensioning roller, causing the tensioning roller to also act perpendicularly on the outer surface of the timing belt, thus adjusting its tension. Although this structure can effectively adjust the tension of the timing belt, its design of "a spring pushing a tensioning roller to act perpendicularly on the outer surface of the timing belt" occupies a large amount of space, leading to an increase in the overall installation space of the machine.
[0005] There is a lack of a solution for a synchronous belt tensioning device that can optimize space utilization in the current technology. Utility Model Content
[0006] To address the shortcomings of the prior art, this utility model provides an automatic tension adjustment device for synchronous belts, which optimizes the direction of the transmission force between the transmission wheel and the spring, thereby reducing the space occupied by the device.
[0007] The technical effects to be achieved by this utility model are realized through the following technical aspects:
[0008] This utility model provides an automatic tension adjustment device for a synchronous belt, used to adjust the tension of a synchronous belt sleeved on two synchronous pulleys. The automatic adjustment device includes at least a fixed base, a spring, a sliding member, a rolling shaft, and a transmission wheel that rotates due to contact friction generated by the pulling of the synchronous belt.
[0009] The fixed base is provided with a sliding rail, and the spring and the sliding member are disposed within the sliding rail; one end of the spring abuts against the inner wall of the sliding rail, and the other end abuts against one side of the sliding member in the sliding direction; the rolling shaft is inserted perpendicularly along the opening direction of the sliding rail, one end is connected to the sliding member, and the other end is inserted into the rotation center axis of the transmission wheel; the rolling shaft is arranged parallel to the surface of the timing belt in a taut state; the transmission wheel is pressed against the surface of the timing belt along the elastic force direction of the spring in a compressed state.
[0010] In some embodiments, the mounting base is further provided with a first top fitting for facilitating compression of the spring by the thrust of the slider, the first top fitting being disposed between the spring and the slider and connected to the end of the spring subjected to the thrust of the slider.
[0011] In some embodiments, the mounting base is further provided with a second top fitting and an adjusting screw for adjusting the compression space of the spring, the adjusting screw being threaded through the side wall of the sliding track away from the slider; one side of the second top fitting is connected to the end of the spring away from the slider, and the other side abuts against the adjusting screw.
[0012] In some embodiments, the second top fitting is further provided with an insertion slot in the insertion direction relative to the adjusting screw, and the adjusting screw is inserted into the insertion slot and abuts against the second top fitting.
[0013] In some embodiments, the outer wall of the fixed base is provided with a scale along the sliding direction of the sliding track for indicating the tension of the timing belt according to the compression distance of the spring, and the sliding member is provided with an extension extending to the scale, and the extension is provided with an indicator arrow for indicating the scale.
[0014] In some embodiments, the sliding track is provided with a first cover plate at the opening relative to the spring.
[0015] In some embodiments, the sidewall of the sliding track away from the slider is configured as a second cover plate.
[0016] In some embodiments, a limit screw is provided on the side wall of the sliding track near the slider.
[0017] In some embodiments, the transmission wheel is provided with annular extension walls on both sides along the rotation direction, and the synchronous belt is disposed between the annular extension walls on both sides.
[0018] In some embodiments, the mounting base is further provided with a mounting bracket for securely connecting to a peripheral device.
[0019] In summary, this utility model has at least the following advantages:
[0020] The automatic tension adjustment device for synchronous belts provided by this utility model sets the rolling shaft inside the rotation center shaft of the transmission wheel, and sets the rolling shaft parallel to the surface of the synchronous belt in a taut state. The force generated when the transmission wheel abuts against the synchronous belt is indirectly applied to the spring, causing the spring to compress to different degrees, which in turn causes the transmission wheel to apply a reaction force to the synchronous belt, thus achieving the effect of automatically adjusting the tension of the synchronous belt and optimizing the space utilization. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the overall structure of embodiments 1-3 of this utility model;
[0022] Figure 2 This is a schematic diagram of the structure of the automatic adjustment device in embodiments 1-3 of this utility model;
[0023] Figure 3 This is a cross-sectional view of the automatic adjustment device in embodiments 1-3 of this utility model;
[0024] Figure 4 This is a partial enlarged view of the scale of Embodiment 2 of this utility model.
[0025] Marked in the image:
[0026] 10. Synchronous belt; 11. Synchronous pulley;
[0027] 20. Fixed base; 21. Sliding rail; 22. Adjusting screw; 23. First top assembly; 24. Second top assembly; 25. Insertion slot; 26. First cover plate; 27. Second cover plate; 28. Mounting base; 29. Limit screw;
[0028] 30. Sliding component; 31. Extension part;
[0029] 40. Spring;
[0030] 50. Rolling shaft;
[0031] 60. Transmission wheel. Detailed Implementation
[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are some, but not all, of the embodiments of this utility model.
[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0034] Example 1:
[0035] Please see the appendix Figure 1-3 The automatic tension adjustment device of this utility model is used to adjust the tension of the synchronous belt 10 sleeved on the two synchronous pulleys 11.
[0036] The automatic adjustment device of this utility model includes at least a fixed base 20, a spring 40, a sliding member 30, a rolling shaft 50, and a transmission wheel 60 that rotates due to contact friction generated by the pulling of the timing belt 10. The transmission wheel 60 can rotate with the pulling of the timing belt 10, which can avoid the timing belt 10 being obstructed by large frictional forces, and at the same time can reduce material loss caused by friction between the transmission wheel 60 and the timing belt 10.
[0037] The fixed base 20 is provided with a sliding rail 21, and the spring 40 and the slider 30 are disposed within the sliding rail 21. The sliding rail 21 restricts the slider 30 within it, and the slider 30 can slide within the sliding rail 21.
[0038] One end of the spring 40 abuts against the inner wall of the sliding track 21, and the other end abuts against one side of the sliding member 30 in the sliding direction. The rolling shaft 50 is inserted perpendicularly along the opening direction of the sliding track 21, with one end connected to the sliding member 30 and the other end inserted into the rotation center shaft of the transmission wheel 60. The rolling shaft 50 is positioned parallel to the surface of the synchronous belt 10 when it is in a taut state. The transmission wheel 60 is pressed against the surface of the synchronous belt 10 along the direction of the elastic force of the spring 40 when it is in a compressed state.
[0039] Based on the above structural connections, the working principle of this application embodiment is as follows:
[0040] When the drive wheel 60 is pressed against the surface of the timing belt 10, the timing belt 10, due to its tension, generates a force that drives the sliding member 30 via the rolling shaft 50. This force causes the sliding member 30 to exert a pushing force on the spring 40, thus compressing the spring 40. The spring 40 then generates a spring force that reacts back to the timing belt 10 along the same path. Since the spring force of the spring 40 automatically adjusts according to the tension of the timing belt 10, the tension of the timing belt 10 can be automatically adjusted through this reaction force.
[0041] This invention significantly reduces the space occupied by the overall device and optimizes space utilization by setting the rolling shaft 50 inside the rotation center shaft of the transmission wheel 60 and setting the direction of the rolling shaft 50 parallel to the surface of the synchronous belt 10 when it is in a taut state.
[0042] Example 2:
[0043] To facilitate easier observation and adjustment of the tension of the synchronous belt 10, this embodiment further optimizes the structure of the sliding track 21 and the sliding member 30 of this utility model. Please refer to [link / reference]. Figure 1-4 .
[0044] The mounting base 20 is also provided with a first top fitting 23 for compressing the spring 40 by the thrust of the sliding member 30. The first top fitting 23 is disposed between the spring 40 and the sliding member 30 and is connected to the end of the spring 40 that is subjected to the thrust of the sliding member 30. The first top fitting 23 allows the sliding member 30 to apply force to the spring 40 more smoothly.
[0045] The fixed base 20 is also provided with a second top assembly 24 and an adjusting screw 22 for adjusting the compression space of the spring 40. The adjusting screw 22 is threaded through the side wall of the sliding track 21 away from the sliding member 30. One side of the second top assembly 24 is connected to the end of the spring 40 away from the sliding member 30, and the other side abuts against the adjusting screw 22. The initial preload required for the timing belt 10 is adjusted by adjusting the adjusting screw 22. As the working life of the timing belt 10 decreases, the tension of the timing belt 10 decreases. At this time, the rolling shaft 50 moves downward adaptively under the action of the spring force of the spring 40, thereby tightening the timing belt 10 and making it reach the required preload again. The formula for the preload is: Required preload = travel stroke × spring constant.
[0046] In this embodiment, the first top fitting 23 and the second top fitting 24 are shaped to match the shape of the spring 40, so that their elastic force is more specific and direct, the utilization rate of the elastic force of the spring 40 is high, and the loss is small.
[0047] The second top fitting 24 is also provided with an insertion slot 25 in the direction relative to the insertion of the adjusting screw 22. The adjusting screw 22 is inserted into the insertion slot 25 and abuts against the second top fitting 24. By providing the insertion slot 25 in the second top fitting 24, the adjusting screw 22 is placed in the insertion slot 25, preventing the adjusting screw 22 from slipping.
[0048] In this embodiment, a scale for indicating the tension of the timing belt 10 based on the compression distance of the spring 40 is provided on the outer wall of the fixed base 20 along the sliding direction of the sliding track 21. The sliding member 30 is provided with an extension 31 extending towards the scale, and the extension 31 is provided with an indicator arrow for indicating the scale. By designing the scale, the initial preload required for adjusting the timing belt 10 by the adjusting screw 22 can be calculated and controlled more accurately.
[0049] In this embodiment, scales can be provided on both sides of the sliding direction of the sliding track 21. Correspondingly, the extension 31 of the slider 30 can be extended to both sides to provide indication on both sides, making it more convenient to use.
[0050] Example 3:
[0051] The difference between this embodiment and Embodiments 1 and 2 is that, based on Embodiments 1 or 2, this embodiment further optimizes the structure of the fixed base 20, the sliding track 21, and the transmission wheel 60. Please refer to... Figure 1-3 .
[0052] In this embodiment, the sliding track 21 is provided with a first cover plate 26 at the opening relative to the spring 40 to prevent the spring 40 from popping outward.
[0053] In this embodiment, the side wall of the sliding track 21 away from the slider 30 is set as a second cover plate 27. By removing the second cover plate 27, the spring 40, the slider 30, the first top kit 23 and the second top kit 24 can be easily installed and removed.
[0054] In this embodiment, a limiting screw 29 is provided on the side wall of the sliding track 21 near the sliding member 30. In order to ensure the accuracy of the subsequent preload and control the service life of the timing belt 10 or the spring 40, a limiting screw 29 is installed below the sliding track 21. Its function is to limit the downward movement of the rolling shaft 50. By adjusting the limiting position of the limiting screw 29, the rolling shaft 50 is prevented from moving down beyond the limiting position, which would lead to inaccurate subsequent preload.
[0055] In this embodiment, the transmission wheel 60 is provided with annular extension walls on both sides along the rotation direction, and the timing belt 10 is disposed between the annular extension walls on both sides to prevent the timing belt 10 from falling off when pulled.
[0056] The mounting base 20 in this embodiment is also provided with a mounting bracket 28 for securely connecting to an external device. The mounting bracket 28 can be used to connect and fix the entire device to the machine in use, so as to securely adjust the tension of the timing belt 10.
[0057] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0058] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0059] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0060] In this invention, unless otherwise expressly specified and limited, "above or below" the first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0061] Although the description of this utility model has been given in conjunction with the specific embodiments described above, it is obvious to those skilled in the art that many substitutions, modifications, and variations can be made based on the above description. Therefore, all such substitutions, modifications, and variations are included within the spirit and scope of the appended claims.
Claims
1. An automatic tension adjustment device for a synchronous belt, used to adjust the tension of a synchronous belt (10) sleeved on two synchronous pulleys (11), characterized in that, The automatic adjustment device includes at least a fixed base (20), a spring (40), a sliding member (30), a rolling shaft (50), and a transmission wheel (60) for rotating due to contact friction generated by the pulling of the synchronous belt (10); The fixed base (20) is provided with a sliding rail (21), and the spring (40) and the slider (30) are disposed in the sliding rail (21); one end of the spring (40) abuts against the inner wall of the sliding rail (21), and the other end abuts against one side of the sliding direction of the slider (30); the rolling shaft (50) is inserted perpendicularly along the opening direction of the sliding rail (21), one end is connected to the slider (30), and the other end is inserted into the rotation center shaft of the transmission wheel (60); the rolling shaft (50) is arranged parallel to the surface of the synchronous belt (10) in a taut state; the transmission wheel (60) is pressed against the surface of the synchronous belt (10) along the elastic force direction of the spring (40) in a compressed state.
2. The automatic tension adjustment device for synchronous belts according to claim 1, characterized in that, The fixed base (20) is also provided with a first top sleeve (23) for compressing the spring (40) by the thrust of the slider (30). The first top sleeve (23) is disposed between the spring (40) and the slider (30) and is connected to the end of the spring (40) that is subjected to the thrust of the slider (30).
3. The automatic tension adjustment device for synchronous belts according to claim 2, characterized in that, The fixed base (20) is also provided with a second top assembly (24) and an adjusting screw (22) for adjusting the compression space of the spring (40). The adjusting screw (22) is threaded through the side wall of the sliding track (21) away from the sliding member (30). One side of the second top assembly (24) is connected to one end of the spring (40) away from the sliding member (30), and the other side abuts against the adjusting screw (22).
4. The automatic tension adjustment device for synchronous belts according to claim 3, characterized in that, The second top assembly (24) is further provided with an insertion slot (25) in the insertion direction relative to the adjustment screw (22), and the adjustment screw (22) is inserted into the insertion slot (25) and abuts against the second top assembly (24).
5. The automatic tension adjustment device for synchronous belts according to any one of claims 2-4, characterized in that, The outer wall of the fixed base (20) is provided with a scale for indicating the tension of the synchronous belt (10) according to the compression distance of the spring (40) along the sliding direction of the sliding track (21). The sliding member (30) is provided with an extension (31) extending toward the scale, and the extension (31) is provided with an indicator arrow for indicating the scale.
6. The automatic tension adjustment device for synchronous belts according to claim 1, characterized in that, The sliding track (21) is provided with a first cover plate (26) at the opening relative to the spring (40).
7. The automatic tension adjustment device for synchronous belts according to claim 1, characterized in that, The sliding track (21) has a second cover plate (27) on its side wall away from the sliding member (30).
8. The automatic tension adjustment device for synchronous belts according to claim 1, characterized in that, The sliding track (21) is provided with a limit screw (29) near the side wall of the slider (30).
9. The automatic tension adjustment device for synchronous belts according to claim 1, characterized in that, The transmission wheel (60) has annular extension walls on both sides along the rotation direction, and the synchronous belt (10) is disposed between the annular extension walls on both sides.
10. The automatic tension adjustment device for synchronous belts according to claim 1, characterized in that, The mounting base (20) is also provided with a mounting bracket (28) for securely connecting to a peripheral device.