Widened tensioner with dustproof function

Abstract

This invention discloses a widenable tensioning wheel with dustproof function, including a bearing. The bearing has an inner ring and an outer ring, which can rotate relative to each other. The outer ring is interference-fitted to a wheel body. Dust covers are connected to both sides of the wheel body via snap-fit ​​assemblies. Two adjusting rings are provided on the wheel body, and the two adjusting rings can move relative to each other within a limited range to adjust the width to fit the belt. The snap-fit ​​assembly includes at least two connecting blocks fixedly connected to one side of the dust cover. A triangular block is fixedly connected to the end of the connecting block away from the dust cover, and the tip of the triangular block protrudes radially outward from the dust cover. This invention allows for easy and quick disassembly by holding two magnetic blocks close to a second rectangular block and a threaded rod, respectively. The blocking block and the limiting block approaching the second rectangular block and the threaded rod are magnetically attracted, further squeezing the elastic element until the blocking block is fully retracted into its corresponding snap-fit ​​groove. The dust cover can then be pulled out.

Description

Technical Field

[0001] This invention relates to the field of tensioner technology, and more particularly to a widenable tensioner with dustproof function. Background Technology

[0002] Engine belt tensioners are an indispensable and commonly used part of an engine. Belts for components such as water pumps, alternators, and air conditioners require tension from the tensioner to function properly. The lifespan of the tensioner directly affects engine reliability; if the tensioner is damaged, it must be replaced or repaired before the engine can operate normally.

[0003] Patent CN109780175B, entitled "Widerable Tensioner with Dustproof Function," discloses a tensioner body and a bearing. The tensioner body is fitted onto the bearing and rotates synchronously. A first dust cover is provided at the front end of the tensioner body, and a second dust cover is provided at the other end of the tensioner body opposite the first dust cover. The first and second dust covers are pressed against the bracket by a pressing mechanism. The tensioner body includes a first half-wheel and a section connected to one end of the first half-wheel and the second half-wheel. The first half of the wheel forms the second half of the tensioning wheel. An adjustment mechanism for adjusting the width of the tensioning wheel body is provided between the first half of the wheel and the second half of the wheel. The clamping mechanism includes a clamping member and a pad. The clamping member clamps the first dust cover and the second dust cover onto the pad. The bracket is provided with a waist-shaped hole. The tensioning wheel shaft passes through the waist-shaped hole and connects to the clamping member. The adjustment mechanism includes an adjustment part consisting of a fastening member provided on the first half of the wheel and a connecting member provided on the second half of the wheel and fastening the fastening member, and a support part with one end abutting against the first half of the wheel and the other end abutting against the second half of the wheel.

[0004] The tensioner in the above technical solution has a simple structure, is easy to use, effectively prevents dust from entering the bearing, ensures the cleanliness of the bearing interior, and significantly improves the bearing's service life. Furthermore, the width of the tensioner body is adjustable, significantly improving its versatility when only the width differs, and reducing production costs. However, the inventors have also discovered the following drawbacks:

[0005] Dust is mainly prevented by setting up a first dust cover and a second dust cover. However, the first and second dust covers are not easy to remove, making it inconvenient to replace the tensioner when changing it. At the same time, it is also inconvenient to adjust the width of the tensioner when changing it. Summary of the Invention

[0006] The purpose of this invention is to propose a widenable tensioning wheel with dustproof function, which facilitates the removal of dustproof components and the adjustment of its actual width.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A dustproof, wide-type tensioner pulley includes a bearing with an inner and outer ring that can rotate relative to each other. The outer ring is interference-fitted to a pulley body. Dust covers are connected to both sides of the pulley body via snap-fit ​​assemblies. Two adjusting rings are provided on the pulley body, and these rings can move relative to each other within a defined range to adjust the width to fit a belt. The snap-fit ​​assembly includes at least two connecting blocks fixedly connected to one side of the dust cover. A triangular block is fixedly connected to the end of each connecting block away from the dust cover, with the protruding tip of the triangular block facing radially outward from the dust cover. The snap-fit ​​assembly further includes at least two through slots formed on the wheel body, the through slots passing through the wheel body and fitting with the triangular block, allowing the triangular block to enter the through slot. The wheel body also has at least four snap-fit ​​slots, with two snap-fit ​​slots forming a group, corresponding to the corresponding through slots. Each snap-fit ​​slot is connected to a blocking block via an elastic element. Each blocking block is fixedly connected to two limiting blocks, and the two limiting blocks are slidably connected to the inner sidewall of the corresponding snap-fit ​​slot. One corner of the blocking block extending into the through slot is chamfered. Both the blocking block and the limiting blocks are made of magnetic material.

[0009] Preferably, a trapezoidal block is fixedly connected in the middle section of the through groove, and the trapezoidal block is adapted to the triangular block.

[0010] Preferably, the adjusting ring is sleeved on the outer periphery of the wheel body, a first rectangular block is fixedly connected to the outer periphery of the wheel body, a second rectangular block is vertically fixedly connected to the first rectangular block, and the two ends of the second rectangular block pass through the two adjusting rings respectively, so that the adjusting ring has a rectangular groove that matches the second rectangular block.

[0011] Preferably, the adjusting ring has a threaded groove, and a threaded rod is provided between the two adjusting rings. The outer wall of the threaded rod has two oppositely arranged external threads, which are threadedly connected to the threaded grooves of the two adjusting rings respectively. The end of the threaded rod has a cross-shaped groove.

[0012] The one or more technical solutions provided in this application embodiment have at least the following technical effects or advantages compared with the prior art:

[0013] This invention involves holding two magnetic blocks close to a second rectangular block and a threaded rod, respectively. This causes the blocking block and the limiting block that are close to the second rectangular block and the threaded rod to be magnetically attracted, thereby further squeezing the elastic element until the blocking block is completely retracted into its corresponding snap-fit ​​groove. Then the dust cover can be pulled out, making disassembly convenient and quick.

[0014] This invention adjusts the distance between two adjusting rings according to the width of different belts. By inserting a Torx screwdriver into the groove and rotating the Torx screwdriver, the threaded rod is driven to rotate synchronously in the same direction. This causes the two adjusting rings to move synchronously relative to or in opposite directions, thereby changing the distance between the two adjusting rings. Regardless of whether the belt is installed on the adjusting rings, it is convenient to adjust the width of the tensioner. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the widened tensioner with dustproof function proposed in this invention;

[0016] Figure 2 This is a partial exploded view of the structure of the widenable tensioner wheel with dustproof function proposed in this invention.

[0017] Figure 3 This is a cross-sectional schematic diagram of the connection structure between the wheel body, dust cover, and adjusting ring of the widened tension wheel with dustproof function proposed in this invention.

[0018] Figure 4 for Figure 3 Enlarged structural diagram at point A;

[0019] Figure 5 for Figure 3 A magnified structural diagram at point B in the middle.

[0020] In the picture:

[0021] 10. Bearing; 11. Inner ring; 12. Outer ring;

[0022] 20. Wheel body; 21. Dust cover; 22. Adjusting ring; 23. Connecting block; 24. Triangular block;

[0023] 30. Through groove; 31. Snap-fit ​​groove; 32. Elastic element; 33. Blocking block; 34. Limiting block; 35. Trapezoidal block;

[0024] 40. First rectangular block; 41. Second rectangular block; 42. Rectangular groove; 43. Threaded groove; 44. Threaded rod; 45. Groove body. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0026] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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 the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] This application provides a wide-type tensioning wheel with dustproof function, which solves the problem that the dust cover on the tensioning wheel in the prior art is not easy to remove, thus making it inconvenient to replace the tensioning wheel itself, and also inconvenient to adjust the width of the tensioning wheel.

[0029] The technical solution in this application is to solve the above problems, and the overall approach is as follows:

[0030] By holding two magnetic blocks and bringing them close to the second rectangular block and the threaded rod respectively, the blocking block and the limiting block that are close to the second rectangular block and the threaded rod are attracted by the magnetism, thereby further squeezing the elastic element until the blocking block is completely retracted into its corresponding snap-fit ​​groove. Then the dust cover can be pulled out, making disassembly convenient and quick.

[0031] To adjust the distance between the two adjusting rings, depending on the width of the belt, insert a Torx screwdriver into the groove and rotate the screwdriver to rotate the threaded rod synchronously in the same direction. This will cause the two adjusting rings to move synchronously relative to or in opposite directions, thereby changing the distance between the two adjusting rings. Regardless of whether the belt is installed on the adjusting rings, it is convenient to adjust the width of the tensioner.

[0032] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0033] Reference Figures 1-5A dustproof, wide-type tensioner pulley includes a bearing 10, which has an inner ring 11 and an outer ring 12. The outer ring 12 and the inner ring 11 are rotatable relative to each other. The outer ring 12 is interference-fitted to a pulley body 20. Dust covers 21 are connected to both sides of the pulley body 20 via snap-fit ​​components. Two adjusting rings 22 are provided on the pulley body 20. The two adjusting rings 22 can move relative to each other within a limited range, thereby adjusting the width to fit the belt. The bearing 10 is prior art and will not be described in detail here. The outer diameter of the outer ring 12 is the same as the inner diameter of the pulley body 20. The interference fit is prior art, which fixes the pulley body 20 onto the outer ring 12. The dust covers... A circular groove is formed in the center of the dust cover 21, which penetrates the dust cover 21 and is adapted to the inner ring 11 of the bearing 10. This allows the clamping nut to pass through the centers of the two dust covers 21 and the bearing 10, thus fixing the entire structure to the bracket. The snap-fit ​​assembly includes at least two connecting blocks 23 fixedly connected to one side of the dust cover 21. A triangular block 24 is fixedly connected to the end of the connecting block 23 away from the dust cover 21. The tip of the triangular block 24 protrudes radially outward from the dust cover 21. The snap-fit ​​assembly also includes at least two through slots 30 formed on the wheel body 20. The through slots 30 penetrate the wheel body 20 and are adapted to the triangular blocks 24, allowing the triangular blocks 24 to enter the through slots 30. Within the through slots 30, it should be noted that at least two through slots 30 and the same number of connecting blocks 23 and triangular blocks 24 can ensure that the dust cover 21 is securely installed on both sides of the wheel body 20, thereby covering the bearing 10 and achieving a dustproof effect. However, the number is not limited to two; the number is N, where N is a positive integer greater than or equal to 2, and its upper limit is the maximum number that can be set on the wheel body 20. The wheel body 20 also has at least four snap-fit ​​slots 31, with two snap-fit ​​slots 31 forming a group, corresponding to the corresponding through slots 30. The snap-fit ​​slots 31 are connected to blocking blocks 33 through elastic members 32. The blocking blocks 33 are fixedly connected to two limiting blocks 34. The position block 34 is slidably connected to the inner wall of the corresponding snap-fit ​​groove 31. The corner of the blocking block 33 extending into the through groove 30 is chamfered. Both the blocking block 33 and the limiting block 34 are made of magnetic material. The elastic element 32 is preferably a spring accessory. Its two ends are respectively connected to the inner wall of the corresponding snap-fit ​​groove 31 and the corresponding blocking block 33. It is always in a compressed state to ensure that the blocking block 33 can always be in the state of entering the through groove 30 when it is not subjected to other active forces. The corner of the blocking block 33 extending into the through groove 30 is chamfered, thereby forming a slope. The slope faces outward on both sides of the wheel body 20. Preferably, the slope is adapted to the triangular block 24.

[0034] Furthermore, a trapezoidal block 35 is fixedly connected in the middle section of the through groove 30, and the trapezoidal block 35 is compatible with the triangular block 24.

[0035] The trapezoidal block 35 is designed so that the two triangular blocks 24 entering the through groove 30 from opposite directions simultaneously abut against the two inclined surfaces of the trapezoidal block 35, thus working together with the blocking block 33 to ensure that the dust cover 21 is securely installed.

[0036] Furthermore, the adjusting ring 22 is sleeved on the outer periphery of the wheel body 20, and a first rectangular block 40 is fixedly connected to the outer periphery of the wheel body 20. A second rectangular block 41 is vertically fixedly connected to the first rectangular block 40. The two ends of the second rectangular block 41 pass through the two adjusting rings 22 respectively, so that the adjusting ring 22 has a rectangular groove 42 that matches the second rectangular block 41.

[0037] Specifically, the inner diameter of the adjusting ring 22 is the same as the outer diameter of the wheel body 20. Through the setting of the second rectangular block 41 and the rectangular groove 42, the two adjusting rings 22 can only move relative to each other, but cannot rotate relative to each other.

[0038] Furthermore, the adjusting ring 22 has a threaded groove 43, and a threaded rod 44 is provided between the two adjusting rings 22. The outer wall of the threaded rod 44 has two oppositely arranged external threads, which are threadedly connected to the threaded grooves 43 of the two adjusting rings 22 respectively. The end of the threaded rod 44 has a cross-shaped groove 45.

[0039] If the threaded rod 44 rotates, the two adjusting rings 22 will move synchronously relative to or opposite to each other, thereby changing the distance between the two adjusting rings 22, thus realizing the adjustment of the width to match the width of the belt.

[0040] The end of the threaded rod 44 is provided with a cross-shaped groove 45, which makes it easy to use a Torx screwdriver to control whether the threaded rod 44 rotates and the direction of rotation. The cross-shaped groove 45 is designed to be compatible with Torx screwdrivers.

[0041] The working principle of this application embodiment is as follows:

[0042] Remove dust cover 21: Hold at least one magnetic block and place it close to the second rectangular block 41 and the threaded rod 44 respectively;

[0043] When the second rectangular block 41 is brought close, the blocking block 33 and the limiting block 34 that are close to the second rectangular block 41 are magnetically attracted to further squeeze the elastic member 32 until the blocking block 33 is completely retracted into its corresponding snap-fit ​​groove 31.

[0044] When the threaded rod 44 is brought close, the blocking block 33 and the limiting block 34 that are close to the threaded rod 44 are magnetically attracted to further squeeze the elastic element 32 until the blocking block 33 is completely retracted into its corresponding snap-fit ​​groove 31.

[0045] In summary, when all the blocking blocks 33 are fully inserted into the snap-fit ​​groove 31, the dust cover 21 can be pulled out, allowing the triangular block 24 to disengage from the through groove 30, making disassembly convenient and quick.

[0046] Width adjustment: The width of the tensioner pulley is adjusted according to the width of different belts. It is actually the distance between the two adjusting rings 22.

[0047] Insert the Torx screwdriver into the slot 45 and rotate the Torx screwdriver to drive the threaded rod 44 to rotate synchronously in the same direction. This will cause the two adjusting rings 22 to move synchronously relative to or opposite to each other, thereby changing the distance between the two adjusting rings 22. Regardless of whether the belt is installed on the adjusting rings 22, it is convenient to adjust the width of the tensioner.

[0048] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A wide-type tensioner with dustproof function, characterized in that, The system includes a bearing (10) having an inner ring (11) and an outer ring (12) that can rotate relative to each other. The outer ring (12) is interference-fitted with a wheel body (20). Dust covers (21) are connected to both sides of the wheel body (20) via snap-fit ​​components. Two adjusting rings (22) are provided on the wheel body (20). The two adjusting rings (22) can move relative to each other within a limited range to adjust the width to fit the belt. The snap-fit ​​components include at least two connecting blocks (23) fixedly connected to one side of the dust cover (21). A triangular block (24) is fixedly connected to one end of the connecting block (23) away from the dust cover (21). The tip of the triangular block (24) protrudes radially outward from the dust cover (21). The snap-fit ​​components also include components formed on... At least two through slots (30) on the wheel body (20) penetrate the wheel body (20) and are adapted to the triangular block (24) so ​​that the triangular block (24) can enter the through slot (30). The wheel body (20) is also provided with at least four snap-fit ​​slots (31). Two snap-fit ​​slots (31) form a group and correspond to the corresponding through slots (30). The snap-fit ​​slots (31) are connected to a blocking block (33) through an elastic element (32). The blocking block (33) is fixedly connected to two limiting blocks (34). The two limiting blocks (34) are slidably connected to the inner sidewall of the corresponding snap-fit ​​slot (31). One corner of the blocking block (33) that extends into the through slot (30) is chamfered. The blocking block (33) and the limiting block (34) are both made of magnetic material.

2. The widenable tensioner with dustproof function according to claim 1, characterized in that, A trapezoidal block (35) is fixedly connected in the middle section of the through groove (30), and the trapezoidal block (35) is adapted to the triangular block (24).

3. The widenable tensioner with dustproof function according to claim 1, characterized in that, The adjusting ring (22) is sleeved on the outer periphery of the wheel body (20). A first rectangular block (40) is fixedly connected to the outer periphery of the wheel body (20). A second rectangular block (41) is vertically fixedly connected to the first rectangular block (40). The two ends of the second rectangular block (41) pass through the two adjusting rings (22) respectively, so that the adjusting ring (22) has a rectangular groove (42) that matches the second rectangular block (41).

4. The widenable tensioner with dustproof function according to claim 1, characterized in that, The adjusting ring (22) has a threaded groove (43), and a threaded rod (44) is provided between the two adjusting rings (22). The outer wall of the threaded rod (44) has two opposite external threads, which are threadedly connected to the threaded grooves (43) of the two adjusting rings (22). The end of the threaded rod (44) has a cross-shaped groove (45).

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