Synchronous belt tensioning mechanism and synchronous belt transmission device

Abstract

This application provides a synchronous belt tensioning mechanism and a synchronous belt drive device, belonging to the technical field of transmission equipment. The synchronous belt tensioning mechanism includes a support base with a guide hole; a tensioning block including a main body and a guide rod connected to the main body, the guide rod being inserted into the guide hole; and an adjusting member rotatably mounted on the support base and threadedly connected to the guide rod. As the adjusting member rotates, the guide rod moves linearly along the guide hole. The adjusting member is threadedly engaged with the guide rod, allowing the adjusting member to rotate. The guide rod is inserted into the guide hole, thus converting the rotation of the adjusting member into linear movement of the guide rod within the guide hole. The driven wheel, mounted on the main body, moves linearly along with the guide rod, thereby adjusting the position of the driven wheel and achieving synchronous belt tension adjustment to adapt to different working conditions. Furthermore, the synchronous belt can be quickly adjusted by rotating the adjusting member, reducing labor costs compared to traditional methods of disassembling and assembling the tensioning wheel.

Description

Technical Field

[0001] This application belongs to the field of transmission equipment technology, and more specifically, relates to a synchronous belt tensioning mechanism and a synchronous belt drive device. Background Technology

[0002] In the field of mechanical transmission, synchronous belts are widely used in various equipment due to their advantages such as accurate transmission ratio, low noise, and high efficiency. However, during long-term operation, synchronous belts are prone to loosening due to stretching, wear, or changes in ambient temperature, which can affect transmission accuracy and stability. Therefore, a reasonable tension adjustment structure is crucial to ensuring the performance of synchronous belt transmission.

[0003] Traditional synchronous belt tensioning methods typically use fixed tensioning pulleys. While these pulleys can achieve a certain tensioning effect, fixed tensioning pulleys are difficult to fine-tune after installation. This results in a lack of quick adjustment, making it difficult to adapt to different working conditions. Consequently, they are less efficient during equipment maintenance or synchronous belt replacement, increasing downtime and labor costs. Utility Model Content

[0004] The purpose of this application is to provide a synchronous belt tensioning mechanism and a synchronous belt drive device to solve the technical problems in the prior art, such as the inability to adapt to different working conditions, inconvenient adjustment, and low efficiency when maintaining or replacing synchronous belts.

[0005] To achieve the above objectives, the technical solution adopted in this application is: to provide a synchronous belt tensioning mechanism, comprising:

[0006] The support base is equipped with a guide hole;

[0007] The tensioning block includes a main body and a guide rod connected to the main body. The guide rod is inserted into the guide hole, and the main body is used to install the driven wheel.

[0008] An adjusting component is rotatably mounted on the support base and threadedly connected to the guide rod. As the adjusting component rotates, the guide rod moves linearly along the guide hole.

[0009] Optionally, the adjusting component includes a screw and an end cap disposed at one end of the screw, the screw being inserted into the guide rod and threadedly engaged with the guide rod; the support base has a baffle, and the end cap is located outside the guide hole and abuts against the baffle.

[0010] Optionally, the end cap has a groove, and the baffle has a through hole for a tool to pass through and be inserted into the groove to rotate the adjusting member.

[0011] Optionally, the baffle and the opening of the guide hole are spaced apart.

[0012] Optionally, the guide hole is a non-circular hole.

[0013] Optionally, the guide rod has an anti-rotation plane.

[0014] Optionally, the guide hole has an opening; the timing belt tensioning mechanism further includes a fixing member, which is installed on the support base and is used to adjust the opening degree of the opening.

[0015] Optionally, the extending direction of the fastener is perpendicular to the axis of the guide hole.

[0016] Optionally, the support base is provided with a receiving groove, and the end of the fixing member is located in the receiving groove.

[0017] This application also provides a synchronous belt drive device, which includes a slide rail, a drive member, a drive pulley, a synchronous belt, and a synchronous belt tensioning mechanism as described above. The support base and the drive member are respectively disposed on the slide rail. The driven pulley is rotatably mounted on the main body. The drive pulley is connected to the drive member for transmission. The synchronous belt is sleeved on the drive pulley and the driven pulley.

[0018] The beneficial effects of the synchronous belt tensioning mechanism and synchronous belt drive device provided in this application are as follows: Compared with the prior art, the synchronous belt tensioning mechanism provided in this application has an adjusting component threadedly engaged with a guide rod, allowing the adjusting component to rotate. The guide rod is inserted into a guide hole, thereby converting the rotation of the adjusting component into linear motion of the guide rod within the guide hole. The driven wheel is mounted on the main body and moves linearly together with the guide rod, thus adjusting the position of the driven wheel and realizing the adjustment of the synchronous belt tension to adapt to different working conditions. Moreover, during equipment maintenance and synchronous belt replacement, the synchronous belt can be quickly adjusted by rotating the adjusting component, which can reduce labor costs compared to the traditional method of disassembling and assembling the tensioning wheel. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the structure of the synchronous belt tensioning mechanism provided in the embodiments of this application;

[0021] Figure 2 for Figure 1 The exploded exploded structural diagram is shown below.

[0022] Figure 3 for Figure 1 The diagram shows a cross-sectional view of the structure.

[0023] Figure 4 for Figure 1 A top view of the structure shown;

[0024] Figure 5 for Figure 1 A side view of the structure shown.

[0025] Figure 6 This is a three-dimensional structural diagram of the support base provided in the embodiments of this application;

[0026] Figure 7 This is a three-dimensional structural diagram of the tensioning block provided in an embodiment of this application;

[0027] Figure 8 This is a three-dimensional structural diagram of the synchronous belt drive device provided in the embodiments of this application;

[0028] Figure 9 for Figure 8 The diagram shows a side view of the synchronous belt drive device.

[0029] Figure 10 for Figure 8 The exploded structural diagram of the synchronous belt drive device is shown.

[0030] The following are the labeling elements in the figure:

[0031] 10. Support base; 11. Guide hole; 12. Baffle; 13. Through hole; 14. Opening; 15. Receiving groove; 20. Tensioning block; 21. Main body; 22. Guide rod; 23. Anti-rotation plane; 30. Driven wheel; 31. Rotating shaft; 40. Adjusting component; 41. Screw; 42. End cap; 43. Groove; 50. Fixing component; 60. Slide rail; 70. Driving component; 80. Driving wheel; 90. Synchronous belt. Detailed Implementation

[0032] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0033] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0034] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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 application.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0036] See Figure 1 and Figure 2 The synchronous belt tensioning mechanism provided in this application includes a support base 10, a tensioning block 20, a driven wheel 30, and an adjusting component 40. The support base 10 has a guide hole 11; the tensioning block 20 includes a main body 21 and a guide rod 22 connected to the main body 21, the guide rod 22 being inserted into the guide hole 11. The driven wheel 30 is rotatably mounted on the main body 21. The adjusting component 40 is rotatably mounted on the support base 10 and threadedly connected to the guide rod 22.

[0037] The driven pulley 30 supports the synchronous belt 90, and rotates relative to the main body 21 during the transmission process of the synchronous belt 90. Specifically, the main body 21 has two opposing support arms and a connecting plate connecting the two support arms, forming a U-shaped structure. The driven pulley 30 is housed within the opening of the U-shaped structure of the main body 21, and the opposite sides of the driven pulley 30 are rotatably engaged with the two support arms one-to-one. In some optional embodiments, rotating shafts protrude from the opposite sides of the driven pulley 30, and each support arm has a insertion hole, into which the rotating shaft is inserted and can rotate. In still other optional embodiments, see [reference needed]. Figure 2 The driven wheel 30 has a through hole extending axially, and the rotating shaft 31 is inserted into the through hole. Both ends of the rotating shaft 31 are connected to the support arms. For example, the rotating shaft 31 is fixedly connected to the two support arms, and the driven wheel 30 is rotatably sleeved on the rotating shaft 31. Alternatively, the rotating shaft 31 is fixedly connected to the driven wheel 30, and both ends of the rotating shaft 31 are rotatably engaged with the support arms.

[0038] The support base 10 is provided with a guide hole 11, the shape of which is consistent with that of the guide rod 22. The guide rod 22 is inserted into the guide hole 11 and can move back and forth within the guide hole 11. The guide rod 22 is located on the side of the connecting plate opposite to the support arm. Optionally, see [reference needed]. Figure 2 and Figure 3 The guide rod 22 has a mounting hole, and the adjusting member 40 has an external thread. The adjusting member 40 is inserted into the mounting hole and threadedly connected to the guide rod 22. Alternatively, the adjusting member 40 has a mounting hole, and the guide rod 22 has an external thread. The guide rod 22 is inserted into the mounting hole and threadedly connected to the adjusting member 40. Because the adjusting member 40 is threadedly connected to the guide rod 22, and the guide rod 22 is inserted into the guide hole 11, when the adjusting member 40 rotates relative to the support base 10, the adjusting member 40 only rotates, thereby allowing the guide rod 22 to move linearly along the axial direction of the guide hole 11.

[0039] The extension direction of the guide rod 22 is perpendicular to the axis of the driven pulley 30. When it is necessary to adjust the tension of the synchronous belt 90, rotating the adjusting member 40 in the first direction causes the guide rod 22 to move linearly outward within the guide hole 11, thereby increasing the distance between the driven pulley 30 and the driving pulley 80 and tensioning the synchronous belt 90. Rotating the adjusting member 40 in the opposite direction of the first direction causes the guide rod 22 to move linearly inward within the guide hole 11, thereby decreasing the distance between the driven pulley 30 and the driving pulley 80. Thus, the tension of the synchronous belt 90 can be adjusted by rotating the adjusting member 40 as needed, without disassembling the tensioning pulley, making adjustment convenient.

[0040] The synchronous belt tensioning mechanism provided in this application embodiment has an adjusting member 40 threadedly engaged with a guide rod 22, allowing the adjusting member 40 to rotate. The guide rod 22 is inserted into a guide hole 11, thereby converting the rotation of the adjusting member 40 into linear motion of the guide rod 22 within the guide hole 11. The driven wheel 30 is mounted on the main body 21 and moves linearly together with the guide rod 22, enabling adjustment of the position of the driven wheel 30 and thus adjusting the tension of the synchronous belt 90. This adapts to different working conditions. Furthermore, during equipment maintenance and replacement of the synchronous belt 90, the synchronous belt 90 can be quickly adjusted by rotating the adjusting member 40, reducing labor costs compared to the traditional method of disassembling and assembling the tensioning wheel.

[0041] In some optional embodiments of this application, see [reference]. Figure 3 The adjusting component 40 includes a screw 41 and an end cap 42 disposed at one end of the screw 41. The screw 41 is inserted into the guide rod 22 and threadedly engaged with the guide rod 22. The support base 10 has a baffle 12, and the end cap 42 is located outside the guide hole 11 and abuts against the baffle 12.

[0042] In one embodiment, the entire screw 41 is threaded. For example, the adjusting member 40 is an adjusting bolt. In another embodiment, only a portion of the screw 41 is threaded. This application does not specifically limit this, as long as the screw 41 and the guide rod 22 are threaded together, and the rotation of the screw 41 can drive the guide rod 22 to move linearly within the guide hole 11.

[0043] To prevent the adjusting member 40 from rotating outwards and causing the guide rod 22 to not move linearly within the guide hole 11, a baffle 12 is provided on the support base 10 to abut against the end cap 42. When the adjusting member 40 rotates, because the end cap 42 abuts against the baffle 12, the adjusting member 40 cannot move along the axial direction of the guide hole 11, thus allowing the guide rod 22, which is threadedly connected to the adjusting member 40, to move linearly within the guide hole 11.

[0044] In addition, the adjusting component 40 can also be installed in a recessed or other manner, as long as the adjusting component 40 does not move in a straight line during rotation.

[0045] In some alternative embodiments, see Figure 2 and Figure 3 The end cap 42 is provided with a groove 43, and the baffle 12 is provided with a through hole 13. The through hole 13 is used for the tool to pass through and be inserted into the groove 43 to rotate the adjusting member 40.

[0046] The baffle 12 is provided with a through hole 13. The through hole 13 can be round, square, or other shapes, as long as it can allow the head of the screwing tool to pass through. Understandably, the size of the through hole 13 is smaller than the size of the end cap 42, so that the end face can rest against the baffle 12 and will not protrude from the through hole 13.

[0047] The groove 43 on the end cap 42 is either a slotted groove or a cross-shaped groove. When it is necessary to rotate the adjusting component 40, the head of a screwdriver or similar tool is inserted into the groove 43 through the through hole 13, and turning the screwdriver will drive the adjusting component 40 to rotate, thereby causing the tensioning block 20 to move linearly relative to the support base 10, thus adjusting the distance between the driving pulley 80 and the driven pulley 30, and adjusting the tension of the synchronous belt 90. Alternatively, the groove 43 is an irregularly shaped groove, and the head of an L-shaped screwdriver is inserted into the groove 43 through the baffle 12, allowing the adjusting component 40 to be rotated, which can also adjust the tension of the synchronous belt 90.

[0048] In some optional embodiments, the baffle 12 blocks the opening of the guide hole 11, that is, the baffle 12 fits snugly against the guide hole 11. Specifically, the through hole 13 communicates with the guide hole 11, and the diameter of the through hole 13 is smaller than the diameter of the guide hole 11, thereby forming a stepped surface at the connection between the guide hole 11 and the through hole 13. After the adjusting member 40 is threadedly connected to the guide rod 22, it is inserted entirely into the guide hole 11 and constrained by the stepped surface at the connection between the through hole 13 and the guide hole 11. In some embodiments, such as Figure 1 As shown, there is a gap between the baffle 12 and the opening of the guide hole 11. Setting this gap facilitates observation of the rotation of the adjusting component 40 and allows for timely detection of problems such as slippage.

[0049] The shape of the guide rod 22 is adapted to the shape of the guide hole 11. In some embodiments, the guide hole 11 is a circular hole, and correspondingly, the guide rod 22 is a circular rod. In still other embodiments, see [reference needed]. Figure 6 The guide hole 11 is a non-circular hole, and correspondingly, the guide rod 22 is a non-circular rod. This non-circular structure prevents the guide rod 22 from rotating within the guide hole 11. For example, the guide rod 22 can be a square rod or an elliptical rod.

[0050] Optional, such as Figure 7 As shown, the guide rod 22 has an anti-rotation plane 23, which extends along the axial direction of the guide rod 22 and is located beside the guide rod 22, thereby making the radial cross-section of the guide rod 22 have a superior arc shape. Correspondingly, the guide hole 11 is a superior arc-shaped hole.

[0051] In some alternative embodiments, see Figure 5 and Figure 6 The guide hole 11 is provided with an opening 14, and the synchronous belt tensioning mechanism also includes a fixing member 50, see reference. Figure 2 and Figure 4 The fastener 50 is installed on the support base 10 and is used to adjust the opening of the opening 14.

[0052] See Figure 2 and Figure 6 The opening 14 is a through slot, the length of which is the same as the axial length of the guide hole 11, and it communicates with the guide hole 11. This gives the guide hole 11 an open opening 14, through which the fixing member 50 passes. The guide hole 11 is larger than the end cap 42, allowing the adjusting member 40 and the guide rod 22 to be threaded together and inserted into the guide hole 11 for assembly. Once installed, the end cap 42 abuts against the baffle 12. To prevent the guide rod 22 from moving within the guide hole 11, after adjusting the position of the driven wheel 30 with the adjusting member 40, the fixing member 50 is tightened to make the guide hole 11 grip the guide rod 22.

[0053] Specifically, tightening the fixing component 50 reduces the opening of the opening 14, causing the wall of the guide hole 11 to fit tightly against the guide rod 22, increasing friction and preventing the guide rod 22 from moving further within the guide hole 11, thus stabilizing the position of the driven wheel 30. Loosening the fixing component 50 increases the opening of the opening 14, reducing friction between the wall of the guide hole 11 and the guide rod 22. At this point, rotating the adjusting component 40 allows the guide rod 22 to move linearly within the guide hole 11. Once the tension of the timing belt 90 is adjusted to the correct position, tightening the fixing component 50 causes the wall of the guide hole 11 to grip the guide rod 22 tightly.

[0054] See Figure 2 The extension direction of the fastener 50 is perpendicular to the hole axis of the guide hole 11.

[0055] The support base 10 has fixing holes, the axis of which is perpendicular to the axis of the guide hole 11. The fixing holes are located on opposite sides of the opening 14. Optionally, the fixing member 50 is an adjusting bolt. Tightening the adjusting bolt reduces the opening 14, increasing the friction between the guide hole 11 wall and the guide rod 22, thus preventing the guide rod 22 from moving. Loosening the adjusting bolt opens the opening 14, reducing the friction between the guide hole 11 wall and the guide rod 22, allowing the guide rod 22 to move within the guide hole 11.

[0056] In some alternative embodiments, the support base 10 is provided with a receiving groove 15, and the end of the fastener 50 is located within the receiving groove 15. The receiving groove 15 is located on one side of the opening 14, and the end of the fastener 50 is hidden within the receiving groove 15 to avoid protrusion. The fastener 50 passes through opposite sides of the opening 14.

[0057] See Figure 8 and Figure 9 This application also provides a synchronous belt drive device, which includes a slide rail 60, a drive member 70, a drive pulley 80, a synchronous belt 90 and a synchronous belt tensioning mechanism as described above. The support base 10 and the drive member 70 are respectively disposed on the slide rail 60, the driven pulley 30 is rotatably mounted on the main body 10, the drive pulley 80 is connected to the drive member 70 for transmission, and the synchronous belt 90 is sleeved on the drive pulley 80 and the driven pulley 30.

[0058] like Figure 9 and Figure 10 As shown, the drive component 70 is a rotary motor, with its base and support 10 located at opposite ends of the slide rail 60. The support 10 has bolt holes through which bolts pass to secure it to the slide rail 60. The rotary motor is fixed to the back of the slide rail 60, and its motor shaft passes through the slide rail 60 and connects to the drive wheel 80. Driven by the drive component 70, the drive wheel 80 rotates, causing the driven wheel 30 to rotate relative to the main body 21 via the timing belt 90. If the timing belt 90 becomes loose, or during installation, rotating the adjusting component 40 causes the guide rod 22 to move linearly, thereby moving the driven wheel 30 away from or closer to the drive wheel 80, thus adjusting the tension of the timing belt 90. This adjustment is convenient and requires no complex structure.

[0059] When replacing the timing belt 90, rotate the fixing component 50 to reduce the friction between the guide hole 11 and the guide rod 22. Then rotate the adjusting component 40 to make the guide rod 22 move linearly within the guide hole 11, adjusting the distance between the driven wheel 30 and the driving wheel 80. After adjustment, tighten the fixing component 50 to increase the friction between the guide rod 22 and the wall of the guide hole 11, fixing the position of the guide rod 22 relative to the support base 10.

[0060] If the timing belt becomes loose after prolonged use, first loosen the fixing component 50, then tighten the adjusting component 40 to move the guide rod 22 outward along the guide hole, increasing the distance between the driving pulley 80 and the driven pulley 30. After the timing belt tension is adjusted to the correct position, tighten the fixing component 50.

[0061] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A synchronous belt tensioning mechanism, characterized in that: include: The support base (10) is provided with a guide hole (11), and the guide hole (11) is provided with an opening (14). The tensioning block (20) includes a main body (21) and a guide rod (22) connected to the main body (21). The guide rod (22) is inserted into the guide hole (11). The main body (21) is used to install the passive wheel (30). Adjusting component (40) is rotatably mounted on the support base (10) and threadedly connected to the guide rod (22). As the adjusting component (40) rotates, the guide rod (22) moves linearly along the guide hole (11). A fastener (50) is mounted on the support base (10) for adjusting the opening (14).

2. The synchronous belt tensioning mechanism as described in claim 1, characterized in that: The adjusting component (40) includes a screw (41) and an end cap (42) disposed at one end of the screw (41). The screw (41) is inserted into the guide rod (22) and threadedly engaged with the guide rod (22). The support base (10) has a baffle (12). The end cap (42) is located outside the guide hole (11) and abuts against the baffle (12).

3. The synchronous belt tensioning mechanism as described in claim 2, characterized in that: The end cap (42) is provided with a groove (43), and the baffle (12) is provided with a through hole (13). The through hole (13) is used for a tool to pass through and be inserted into the groove (43) to rotate the adjusting member (40).

4. The synchronous belt tensioning mechanism as described in claim 3, characterized in that: The baffle (12) has a gap with the opening of the guide hole (11).

5. The synchronous belt tensioning mechanism as described in claim 1, characterized in that: The guide hole (11) is a non-circular hole.

6. The synchronous belt tensioning mechanism as described in claim 1 or 5, characterized in that: The guide rod (22) has an anti-rotation plane (23).

7. The synchronous belt tensioning mechanism as described in claim 1, characterized in that: The extension direction of the fastener (50) is perpendicular to the hole axis of the guide hole (11).

8. The synchronous belt tensioning mechanism as described in claim 1, characterized in that: The support base (10) is provided with a receiving groove (15), and the end of the fastener (50) is located in the receiving groove (15).

9. A synchronous belt drive device, characterized in that: The device includes a slide rail (60), a drive member (70), a drive wheel (80), a timing belt (90), and a timing belt tensioning mechanism as described in any one of claims 1 to 8. The support base (10) and the drive member (70) are respectively disposed on the slide rail (60). The driven wheel (30) is rotatably mounted on the main body (21). The drive wheel (80) is connected to the drive member (70) in a transmission manner. The timing belt (90) is sleeved on the drive wheel (80) and the driven wheel (30).

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