High-durability tensioner

Abstract

The high-durability tensioner comprises a shell and a tensioning arm, a ferrule is connected to the bottom of the shell in an inserted mode, a center shaft is connected to the interior of the ferrule in an inserted mode, a spring connected to the ferrule in a sleeved mode is arranged in the shell, a first limiting groove matched with the spring is formed in the bottom of the inner side of the shell, and a second limiting groove matched with the spring is formed in the bottom of the inner side of the shell. A first limiting groove matched with the spring is formed in the inner wall of the shell, a second limiting groove matched with the spring is formed in the top of the inner side of the tensioning arm, and an outer damping plate located on the outer side of the spring is arranged in the shell. And the belt pulley stress of the tensioner and the torque of the spring are determined according to the position of the ferrule, and the force of the belt pulley stress and the torque of the spring are calculated according to the position of the ferrule, so that the force is equal or close, the torque of the tensioning wheel is balanced, and the aim of solving the problem is fulfilled.

Description

Technical Field

[0001] The utility model relates to the technical field of tensioners, in particular to a high-durability tensioner. Background Art

[0002] The tensioner is a commonly used retaining device in belt and chain transmission systems. Its characteristic is that it can keep the belt and chain with appropriate tension during the transmission process, so as to avoid the belt slipping, or prevent the synchronous belt from jumping teeth or being dragged out. In the traditional tensioner structure, the center shaft installed on the equipment is in direct contact with the inner wall of the shell. When the tensioner rotates and works, the pin rod will produce friction with the inner wall of the shell, and the center shaft and the inner wall of the shell will be worn, resulting in an increase in the gap between the center shaft and the inner wall of the shell, and also making the pulley easy to shake during operation, which will affect the tension of the belt, affect the balance of the tensioner's work, and shorten the service life of the tensioner. The forces generated at both ends of the tensioner are opposite, and the pulley and the tensioner body of the tensioner are like a Z-shaped structure. When the pulley is under force, the pulley will flip upward, that is, flip in the counterclockwise direction. The impact after the flip is that the pulley 15 tilts, causing abnormal noise in the product wheel system.

[0003] In view of the above problems, the present invention makes improvements. Summary of the invention

[0004] The utility model provides a high-durability tensioner, which solves the above-mentioned problems existing in the use process of the prior art.

[0005] The technical solution of the utility model is achieved as follows: a high-durability tensioner comprises a shell and a tensioning arm, a ferrule is inserted at the bottom of the shell, a central axis is inserted inside the ferrule, a spring sleeved on the ferrule is arranged inside the shell, a limiting groove 1 adapted to the spring is provided at the bottom of the inner side of the shell, a limiting groove 2 adapted to the spring is provided at the top of the inner side of the tensioning arm, an outer damping plate located outside the spring is provided inside the shell, an inner damping plate located between the spring and the outer damping plate is provided inside the shell, the inner damping plate and the outer damping plate are adapted, the inner damping plate and the outer damping plate are integrally formed, and a block stuck inside the tensioning arm is fixedly connected to the inner side of the inner damping plate.

[0006] The utility model is used for a high-durability tensioner as described above, further comprising: a plug hole is provided on one side of the top of the shell, a latch is inserted into the plug hole, and a limiting protrusion adapted to the latch is integrally formed on one side of the tensioning arm.

[0007] The utility model is used for a high-durability tensioner as described above, and further: both sides of the top of the shell are provided with reserved installation holes, and one side of the top of the tensioning arm is pressed and formed with a wrench nut.

[0008] The utility model is used for the high-durability tensioner as described above, and further: a bearing is sleeved on the inner side of the tensioning arm, and a pulley is sleeved on the outer side of the bearing.

[0009] The utility model is used for a high-durability tensioner as described above, and further: a mounting bolt is inserted into the interior of the bearing, and the bearing is rotatably mounted on the tensioning arm through the mounting bolt.

[0010] The utility model is used for the high-durability tensioner as described above, and further: the top of the pulley is embedded and clamped with a dust cover, and the dust cover is arranged above the mounting bolt.

[0011] The utility model is used for a high-durability tensioner as described above, further comprising: a placement groove adapted to the inner damping plate and the outer damping plate is opened at the top of the inner side of the tensioning arm, a clamping groove adapted to the clamping block is opened at one side of the top of the inner side of the tensioning arm, and the clamping groove is connected to the placement groove.

[0012] In summary, the beneficial effects of the present invention are:

[0013] 1. The utility model adopts a structural design in which a ferrule is arranged between the central axis of the connecting device and the inner wall of the tensioner housing, so as to design a torque balance structure, and determine the force on the pulley of the tensioner and the torque of the spring through the position of the ferrule to ensure that the forces of the two are equal or close, thereby ensuring that the torque of the tensioner reaches a balanced state, thereby achieving the purpose of solving the above-mentioned problem.

[0014] 2. The utility model has a reserved installation hole and a wrench nut. The reserved installation hole is reserved for installing the bolt. In this way, when the user is performing installation work, it is convenient for the user to insert the bolt into the reserved installation hole, and it is also convenient for the user to install the tensioner to the equipment through the bolt, which provides convenience for the user's work.

[0015] 3. The utility model arranges the bearing, the pulley and the mounting bolt. The bearing rotates on the tensioning arm, and the mounting bolt passes through the bearing and is inserted into the tensioning arm. The top of the mounting bolt is also stuck on the top of the bearing, thereby realizing the positioning and fixing of the bearing, ensuring that the bearing will not move at will. This can also ensure the stability of the pulley when it rotates, providing convenience for the user's work.

[0016] 4. The utility model is provided with a dust cover, which is embedded on the pulley, so that the tensioner can be beautiful and fully sealed to prevent dust.

[0017] 5. The utility model sets a card slot and a placement slot. During installation, the card block is inserted into the card slot, and the inner damping plate is set in the outer damping plate. Then the inner damping plate and the outer damping plate are stuck in the placement slot together, thereby realizing the positioning of the inner damping plate, the outer damping plate and the card block, ensuring that the inner damping plate and the outer damping plate can play the greatest effect in use, providing convenience for the user's work. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model;

[0021] Figure 3 is a schematic cross-sectional view of the three-dimensional structure of the tensioning arm;

[0022] Figure 4 It is a bottom view schematic diagram of the three-dimensional structure of the tensioning arm;

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the shell.

[0024] In the figure: 1, housing, 1-1, limit slot 1, 2, tensioning arm, 2-1, limit slot 2, 3, ring, 4, center shaft, 5, spring, 6, inner damping plate, 7, outer damping plate, 8, block, 9, jack, 10, latch, 11, reserved installation hole, 12, pulley nut, 13, limit protrusion, 14, bearing, 15, pulley, 16, mounting bolt, 17, dust cover, 18, slot, 19, placement slot. DETAILED DESCRIPTION

[0025] The following will be combined with the attached embodiment of the present utility model Figure 1-5 , clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0026] A high-durability tensioner comprises a shell 1 and a tensioning arm 2, a ferrule 3 is inserted at the bottom of the shell 1, a center shaft 4 is inserted inside the ferrule 3, a spring 5 sleeved on the ferrule 3 is arranged inside the shell 1, a limiting groove 1-1 matched with the spring 5 is opened at the bottom of the inner side of the shell 1, a limiting groove 2-1 matched with the spring 5 is opened at the top of the inner side of the tensioning arm 2, an outer damping plate 7 located outside the spring 5 is arranged inside the shell 1, an inner damping plate 6 located between the spring 5 and the outer damping plate 7 is arranged inside the shell 1, the inner damping plate 6 and the outer damping plate 7 are matched, the inner damping plate 6 and the outer damping plate 7 are integrally formed, and a block 8 stuck in the tensioning arm 2 is fixedly connected to the inner side of the inner damping plate 6.

[0027] The specific usage process is as follows: during the assembly of the tensioner, first insert the ring 3 from the bottom of the shell 1, and then insert the center shaft 4 from the bottom of the shell 1 into the ring 3, and the ring 3 and the center shaft 4 are all embedded in the inner side of the shell 1, and the top ends of the ring 3 and the center shaft 4 are all inserted into the shell 1, then place the spring 5 into the shell 1, during which, ensure that the top ends of the ring 3 and the center shaft 4 are located on the inner side of the spring 5, and then put the inner damping plate 6 and the outer damping plate 7 into the shell 1 in turn, wherein the outer damping plate 7 is located between the inner wall of the shell 1 and the spring 5, and the inner damping plate 6 is located between the spring 5 and the outer damping plate 7, and the inner damping plate 6 and the outer damping plate 7 are integrally formed, so that the inner damping plate 6 and It should be noted that when the spring expands outward, the damping member rubs against the inner wall of the shell to generate damping, thereby ensuring the stability of the tensioner when it is working and providing convenience for the user's work. It should be noted that one end of the spring 5 is stuck in the shell 1, and the other end of the spring 5 is stuck in the tensioning arm 2. In this way, when in use, one end of the spring 5 will remain stationary with the shell 1, and the other end will move with the tensioning arm 2, providing convenience for the user. This is a prior art and will not be described in detail in the text. The damping member, that is, the component composed of the inner damping plate 6 and the outer damping plate 7, is provided with an installation groove 1 corresponding to the installation groove 2 of the tensioning arm 2. After placement, the spring 5 is inserted, and the cross section of the spring 5 is against the limit block of the tensioning arm 2. Then install the other end of the spring 5 into the limiting groove 1-1 of the shell, and then twist the angle of the tensioning arm 2 through the equipment. After reaching the installation position, press down the tensioning arm 2 and rivet it with the center shaft 4 to complete the assembly process of the spring 5. The installation of the pulley 15, the buckling of the dust cover 17 and the installation of the latch 10 are all after the above assembly. Then use the mounting bolts to insert from the outside of the tensioning arm 2 and pass through the tensioning arm 2 and the center shaft 4 to directly fix it on the equipment. In this way, the installation of the tensioner is completed. It should be noted that before this, the pulley 15 needs to be installed. The process is as follows: first, insert the bearing 14 into the pulley 15, and then clamp the bearing 14 and the pulley 15 together to the installation position on the tensioning arm 2, and then pass the mounting bolts 16 into The bearing 14 is inserted into the tensioning arm 2 through the bearing 14, and finally the mounting bolts 16 are tightened to fix the bearing 14 on the tensioning arm 2, and then the dust cover 17 is clamped on the pulley 15, which can play a role of full sealing and dustproof. When installing the belt, first install the tensioner on the engine stand, then put the belt on the pulley 15, and then put the wrench on the hexagon of the tensioning arm 2, and then pull the pulley 15. After the pin 10 is pulled out, release the wrench, the pulley 15 returns to the belt, and the belt will be tensioned. The same is true when removing the pulley 15. The wrench acts on the hexagon of the tensioning arm and pulls the tensioning arm 2, causing the pulley 15 and the belt to loosen. After the belt is taken out, the pulley 15 returns to the free arm position, and then the mounting bolts are loosened.In this way, the belt will not exert pressure on the pulley 15. When the tensioning arm 2 moves, the spring 5 will be twisted. At the same time, the spring 5 will exert a rebound force on the tensioning arm 2. It should be noted that this rebound force can ensure that the pulley 15 is always tightly against the belt when the tensioning arm 2 is not rotated, ensuring the normal operation of the belt. Then, when the tensioning arm 2 rotates, it will also drive the central shaft 4 to move. This is the prior art. During the movement of the central shaft 4, it will directly contact the ring 3 to generate friction, and will not contact the inner wall of the shell 1 to cause wear. The ferrule 3 is sleeved on the central shaft 4, so when the central shaft 4 rotates, the entire surface will contact the inner wall of the ferrule 3, and then there will be no uneven wear, ensuring the balance of the tensioner during operation, increasing the durability of the tensioner, and extending the service life of the tensioner. Therefore, a torque balance structure is designed, and the position of the ferrule 3 is used to determine the force on the pulley 15 of the tensioner and the torque of the spring 5. The position of the ferrule 3 is used to calculate to ensure that the forces of the two are equal or close, thereby ensuring that the torque of the tensioner reaches a balanced state.

[0028] Therefore, a structural design is adopted in which a ring is set between the central axis of the connecting device and the inner wall of the tensioner housing, and the position of the ring is used to determine the force on the tensioner pulley and the torque of the spring. This ensures that the forces of the two are equal or close, thereby ensuring that the torque of the tensioner pulley reaches a balanced state and achieving the purpose of solving the above-mentioned problem.

[0029] A socket 9 is provided on one side of the top of the shell 1, a latch 10 is inserted into the socket 9, a limiting protrusion 13 adapted to the latch 10 is integrally formed on one side of the tensioning arm 2, reserved mounting holes 11 are provided on both sides of the top of the shell 1, and a lever nut 12 is pressed and formed on one side of the top of the tensioning arm 2.

[0030] Specifically, the reserved mounting hole 11 and the lever nut 12 are provided, and the reserved mounting hole 11 is reserved for mounting bolts, so that when the user is performing installation work, it is convenient for the user to insert the bolt into the reserved mounting hole 11, and it is also convenient for the user to install the tensioner to the equipment through the bolt, providing convenience for the user's work.

[0031] A bearing 14 is sleeved on the inner side of the tensioning arm 2 , a pulley 15 is sleeved on the outer side of the bearing 14 , a mounting bolt 16 is inserted into the interior of the bearing 14 , and the bearing 14 is rotatably mounted on the tensioning arm 2 via the mounting bolt 16 .

[0032] Specifically, the bearing 14, the pulley 15 and the mounting bolt 16 are arranged such that the bearing 14 rotates on the tensioning arm 2, and the mounting bolt 16 passes through the bearing 14 and is inserted into the tensioning arm 2, and the top end of the mounting bolt 16 is also stuck on the top of the bearing 14, thereby realizing the positioning and fixing of the bearing 14, ensuring that the bearing 14 will not move at will, and thus ensuring the stability of the pulley 15 when it rotates, providing convenience for the user's work.

[0033] A dust cover 17 is embedded and clamped on the top of the pulley 15 , and the dust cover 17 is arranged above the mounting bolts 16 .

[0034] Specifically, the dust cover 17 is provided in an embedded manner on the pulley 15, which can ensure the beauty of the tensioner and play a role in full sealing and dustproofing.

[0035] A placement groove 19 adapted to the inner damping plate 6 and the outer damping plate 7 is opened at the top of the inner side of the tensioning arm 2 , and a clamping groove 18 adapted to the clamping block 8 is opened on one side of the top of the inner side of the tensioning arm 2 , and the clamping groove 18 is connected to the placement groove 19 .

[0036] Specifically, the arrangement of the card slot 18 and the placement slot 19 is such that, during installation, the card block 8 is inserted into the card slot 18, and the inner damping plate 6 is arranged in the outer damping plate 7, and then the inner damping plate 6 and the outer damping plate 7 are together inserted into the placement slot 19, thereby realizing the positioning of the inner damping plate 6, the outer damping plate 7 and the card block 8, ensuring that the inner damping plate 6 and the outer damping plate 7 can exert the maximum effect during use, providing convenience for the user's work.

[0037] It should be noted that the functions to be implemented by each hardware in the utility model are supported by a large number of mature technologies and belong to the existing technology. The essence of the utility model is to optimize the combination of existing hardware and its connection method for specific application scenarios to meet the adaptation needs in specific application scenarios and solve the problems raised in the background technology (not involving improvements to the software inside the hardware).

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-durability tensioner, comprising a housing (1) and a tensioning arm (2), characterized in that: A ferrule (3) is inserted at the bottom of the housing (1), a central shaft (4) is inserted inside the ferrule (3), a spring (5) sleeved on the ferrule (3) is arranged inside the housing (1), a limiting groove (1-1) matching the spring (5) is provided at the bottom of the inner side of the housing (1), a limiting groove (2-1) matching the spring (5) is provided at the top of the inner side of the tensioning arm (2), an outer damping plate (7) located outside the spring (5) is arranged inside the housing (1), an inner damping plate (6) located between the spring (5) and the outer damping plate (7) is arranged inside the housing (1), the inner damping plate (6) and the outer damping plate (7) are matched, the inner damping plate (6) and the outer damping plate (7) are integrally formed, and a clamping block (8) clamped inside the tensioning arm (2) is fixedly connected to the inner side of the inner damping plate (6).

2. A high-durability tensioner according to claim 1, characterized in that: A plug hole (9) is provided on one side of the top of the housing (1), a plug pin (10) is plugged into the plug hole (9), and a limiting protrusion (13) adapted to the plug pin (10) is integrally formed on one side of the tensioning arm (2).

3. A high-durability tensioner according to claim 2, characterized in that: Reserved mounting holes (11) are provided on both sides of the top of the housing (1), and a lever nut (12) is pressed and formed on one side of the top of the tensioning arm (2).

4. A high-durability tensioner according to claim 3, characterized in that: A bearing (14) is sleeved on the inner side of the tensioning arm (2), and a belt pulley (15) is sleeved on the outer side of the bearing (14).

5. A high-durability tensioner according to claim 4, characterized in that: A mounting bolt (16) is inserted into the interior of the bearing (14), and the bearing (14) is rotatably mounted on the tensioning arm (2) via the mounting bolt (16).

6. A high-durability tensioner according to claim 5, characterized in that: A dust cover (17) is embedded and clamped on the top of the pulley (15), and the dust cover (17) is arranged above the mounting bolt (16).

7. A high-durability tensioner according to claim 6, characterized in that: A placement groove (19) adapted to the inner damping plate (6) and the outer damping plate (7) is provided at the top of the inner side of the tensioning arm (2), and a clamping groove (18) adapted to the clamping block (8) is provided at one side of the top of the inner side of the tensioning arm (2), and the clamping groove (18) is communicated with the placement groove (19).

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