High-adaptability universal structure tensioning wheel

Abstract

The invention discloses a high-adaptability universal structure tensioning wheel which comprises a supporting plate, a first clamping ring, a second clamping ring, a sliding bearing, a center shaft sleeve, a positioning bolt, a spring, a center bolt, a supporting sleeve, a belt pulley, a deep groove ball bearing, a shaft bolt, a dustproof cover and a check ring. A positioning bolt structure is additionally arranged, and the mounting angle of the tensioning wheel is adjusted by utilizing the adjustability of the positioning bolt; by replacing springs with different diameters, the torque value of the tensioning wheel is adjusted, and the adaptability of the tensioning wheel in tension requirements of different wheel trains is achieved; by replacing belt wheels with different diameters and widths, the adaptability of belt installation of the tensioning wheel in different wheel trains is achieved; by replacing the central shaft sleeves with different heights, the adaptability of the tensioning wheel in different wheel trains in the mounting height is realized; the front end of the bearing adopts a metal full-sealing dustproof cover full-sealing dustproof structure, and the rear end of the bearing adopts a labyrinth dustproof structure, so that the service life of the tensioning wheel is prolonged, and the reliability of the tensioning wheel is improved.

Description

Technical Field

[0001] The present invention relates to the field of tensioning, and particularly to a high - adaptability universal - structure tensioning pulley. Background Art

[0002] In the front - end gear train of an engine, multi - wedge belts are increasingly widely used. However, belt drive belongs to friction drive. As time goes by, the belt will gradually stretch and wear. In order to ensure that the engine can stably, efficiently, and reliably transfer energy to each front - end accessory, and ensure that the belt tension changes within a relatively stable range, a tensioning device is added to the front - end gear - train accessories.

[0003] Traditional fixed - type tensioning devices cannot automatically compensate for the stretching of the belt. When the belt tension is insufficient, problems such as low transmission efficiency and high noise will occur in the accessory belt drive system. Automatic tensioning pulleys have been developed. As the belt gradually stretches and wears, they can ensure that the belt tension changes within a relatively stable range, and ensure that the engine can stably, efficiently, and reliably transfer energy to each front - end accessory. However, there are the following problems: 1. Fixed installation angle: Using a pin - structure to fix the support sleeve results in the inability to adjust the installation angle of the tensioning pulley, making it difficult to adapt to the space requirements of different gear - train layouts and the belt running direction; 2. Single tension: Usually equipped with springs of fixed specifications, the provided tensioning force is non - adjustable and cannot meet the different requirements for belt tension in different gear trains; 3. Poor adaptability of the belt pulley: The size of the belt pulley is fixed and cannot be replaced according to the actual belt specifications or transmission requirements during use, resulting in low versatility; 4. Non - adjustable installation height: The height of the central shaft sleeve is fixed, lacking the ability to adjust, and it is difficult to adapt to the differences in the positions of the installation bases in different gear trains; 5. Insufficient dust - proof and sealing: The dust - proof design of the bearing is limited, and it is easily invaded by pollutants in the working environment, resulting in early wear and failure of the bearing, affecting the service life and reliability. Summary of the Invention

[0004] In order to solve the above - mentioned technical problems, the present invention proposes a high - adaptability universal - structure tensioning pulley.

[0005] A high - adaptability universal - structure tensioning pulley includes a support plate, a first snap ring, a second snap ring, a sliding bearing, a central shaft sleeve, a positioning bolt, a spring, a central bolt, a support sleeve, a belt pulley, a deep - groove ball bearing, a shaft bolt, a dust cover, and a retaining ring; The support plate and the support sleeve are fixedly connected through the central shaft sleeve; One end of the spring is connected to the support sleeve, and the other end is connected to the support plate; The sliding bearing is press - fitted between the support plate and the central shaft sleeve by interference fit, enabling the support plate to rotate around the center of the central shaft sleeve; A first snap ring is also provided between the support sleeve and the spring; The second snap ring is sleeved on the first snap ring sleeve; The positioning bolt adjusts the installation angle of the tension pulley; The center bolt fixes the center position of the tension pulley; The pulley is connected to the deep groove ball bearing, and the retaining ring limits the pulley; The support plate and the pulley are connected by a shaft bolt.

[0006] Among them, the first snap ring is a dust-proof and wear-reducing sleeve ring, ensuring high wear resistance and high reliability of the tension pulley; Among them, the first snap ring reduces the wear between the support sleeve and the spring; Among them, the material of the first snap ring is plastic.

[0007] Furthermore, for a high-adaptability universal structure tension pulley, a dust-proof and wear-reducing sleeve ring, a spring limit block, and a bearing positioning step are provided on the upper end surface of the support plate.

[0008] Among them, the bearing positioning step ensures the normal rotation of the outer pulley of the bearing.

[0009] Furthermore, for a high-adaptability universal structure tension pulley, one end of the spring is fixed to the spring limit block of the support sleeve, and the other end is connected to the spring limit block of the support plate.

[0010] Among them, the connection between the spring and the spring limit block of the support plate ensures the rotationality, thus meeting the requirement for the tension pulley to provide torque.

[0011] Furthermore, for a high-adaptability universal structure tension pulley, the support plate and the support sleeve are fixedly connected by the knurling at both ends of the center shaft sleeve.

[0012] Among them, the center shaft sleeve and the support sleeve connect all parts into one body by means of knurling.

[0013] Furthermore, for a high-adaptability universal structure tension pulley, the pulley contacts the belt to tension the belt; The deep groove ball bearing drives the pulley to roll; The support sleeve is fixed on the engine.

[0014] Furthermore, for a high-adaptability universal structure tension pulley, the dust cover includes a metal fully sealed dust cover and a labyrinth dust cover; The metal fully sealed dust cover is arranged at the front end of the sliding bearing; The labyrinth dust cover is arranged at the rear end of the sliding bearing.

[0015] Furthermore, a high - adaptability universal - structure tension pulley, the spring is a detachable structure. By replacing springs with different diameters, the torque value of the tension pulley can be adjusted.

[0016] Furthermore, a high - adaptability universal - structure tension pulley, the pulley is a detachable structure. By replacing pulleys with different diameters and widths, the tension pulley can be adjusted to adapt to belt types in different gear trains.

[0017] Furthermore, a high - adaptability universal - structure tension pulley, the central bushing is a detachable structure. By replacing central bushings with different heights, the tension pulley can be adjusted to adapt to the installation height in different gear trains.

[0018] The beneficial effects of the present invention are as follows: 1. Compared with the traditional tension pulley, the traditional pin structure on the support sleeve is cancelled, and a positioning bolt structure is added. By using the adjustability of the positioning bolt, the installation angle of the tension pulley is adjusted to achieve the adaptability of the installation angle of the tension pulley in different gear trains. 2. By replacing springs with different diameters, the torque value of the tension pulley is adjusted to achieve the adaptability of the tension requirement of the tension pulley in different gear trains. 3. By replacing pulleys with different diameters and widths, the adaptability of the belt installation of the tension pulley in different gear trains is achieved. 4. By replacing central bushings with different heights, the adaptability of the installation height of the tension pulley in different gear trains is achieved. 5. The front end of the bearing adopts a fully - sealed dust - proof structure with a metal full - sealed dust cover, and the rear end of the bearing adopts a labyrinth - type dust - proof structure, which improves the service life and reliability of the tension pulley. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of a high - adaptability universal - structure tension pulley.

[0020] Figure 2 It is a front - view of the structure of a high - adaptability universal - structure tension pulley.

[0021] In the figure: 1 - support plate, 2 - first snap ring, 3 - second snap ring, 4 - sliding bearing, 5 - central bushing, 6 - dust - proof and wear - reducing sleeve ring, 7 - positioning bolt, 8 - spring, 9 - central bolt, 10 - support sleeve, 11 - pulley, 12 - deep - groove ball bearing, 13 - shaft bolt, 14 - dust cover, 15 - retaining ring. Detailed Embodiments

[0022] A further description of the present invention is made, but the protection scope of the present invention is not limited to the following.

[0023] Specific Embodiment 1 Composition of the High - Adaptability Universal - Structure Tension Pulley As shown in the appendixFigure 1 As shown in the figure, a high-adaptability universal structure tension pulley includes a support plate 1, a first snap ring 2, a second snap ring 3, a sliding bearing 4, a central bushing 5, a positioning bolt 7, a spring 8, a central bolt 9, a support sleeve 10, a pulley 11, a deep groove ball bearing 12, a shaft bolt 13, a dust cover 14, and a retaining ring 15; The support plate 1 and the support sleeve 10 are fixedly connected through the central bushing 5. One end of the spring 8 is connected to the support sleeve 10, and the other end is connected to the support plate 1. An interference fit is used between the support plate 1 and the central bushing 5 to press-fit the sliding bearing 4, enabling the support plate 1 to rotate around the center of the central bushing 5.

[0024] A first snap ring 2 is also provided between the support sleeve 10 and the spring 8, and the second snap ring 3 is sleeved on the first snap ring 2.

[0025] The positioning bolt 7 adjusts the installation angle of the tension pulley, and the central bolt 9 fixes the central position of the tension pulley.

[0026] The pulley 11 is connected to the deep groove ball bearing 12, the retaining ring 15 limits the position of the pulley 11, and the support plate 1 and the pulley 11 are connected through the shaft bolt 13.

[0027] A dust-proof and wear-reducing sleeve 6, a spring limit block, and a bearing positioning step are provided on the upper end surface of the support plate 1.

[0028] One end of the spring 8 is fixed to the spring limit block of the support sleeve 10, and the other end is connected to the spring limit block of the support plate 1.

[0029] The support plate 1 and the support sleeve 10 are fixedly connected through the knurling at both ends of the central bushing 5. The central bushing 5 and the support sleeve 10 connect all parts together through knurling.

[0030] The pulley 11 contacts the belt to tension the belt. The deep groove ball bearing 12 drives the pulley 11 to roll, and the support sleeve 10 is fixed on the engine.

[0031] The dust cover 14 includes a metal fully sealed dust cover and a labyrinth dust cover. The metal fully sealed dust cover is arranged at the front end of the sliding bearing 4, and the labyrinth dust cover is arranged at the rear end of the sliding bearing 4.

[0032] The spring 8 is a detachable structure. By replacing the spring 8 with different diameters, the torque value of the tension pulley can be adjusted. The pulley 11 is a detachable structure. By replacing the pulley 11 with different diameters and widths, the tension pulley can be adjusted to adapt to different belt types in different gear systems. The central bushing 5 is a detachable structure. By replacing the central bushing 5 with different heights, the tension pulley can be adjusted to adapt to the installation height in different gear systems.

[0033] Specific Embodiment 2: Functions of Components of the High-Adaptability Universal Structure Tension Pulley Bracket 1: The bracket 1 is provided with a spring limit block to meet the torque requirement of the tensioner; it is provided with a step for bearing positioning to ensure the normal rotation of the outer pulley 11 of the bearing; a dust-proof and wear-reducing bushing 6 is installed on the upper end surface of the bracket 1, and a plastic snap ring is also installed between the support sleeve 10 and the spring 8 to ensure the high wear resistance and high reliability of the tensioner; First snap ring 2: It reduces friction between the support sleeve 10 and the spring 8 and is a plastic snap ring; Second snap ring 3: It is the carrier of the plastic snap ring, used in conjunction with the plastic snap ring to provide protection for the plastic snap ring; Plain bearing 4: Connects the bracket 1 and the central bushing 5 to enable the bracket 1 to rotate around the center of the central bushing 5; Central bushing 5: Connects the bracket 1 and the plain bearing 4 to enable the bracket 1 to rotate around the center of the central bushing 5; it is in interference fit with the support sleeve 10 through knurling to connect the support sleeve 10 of the tensioner and integrate all parts; Dust-proof and wear-reducing bushing 6: It is dust-proof and wear-reducing between the bracket 1 and the support sleeve 10; Positioning bolt 7: Adjusts the installation angle of the tensioner and fixes the initial position of the tensioner; Spring 8: The two ends of the cylindrical spring are respectively provided with limit blocks, one end is connected to the support sleeve 10, and the other end is connected to the bracket 1, so as to meet the torque requirement of the tensioner and realize the automatic adjustment of the belt tension by the tensioner; Central bolt 9: Fixes the central position of the tensioner; Support sleeve 10: The support sleeve 10 is fixed on the engine, connects the bracket 1 through the central bushing 5, and integrates all parts by knurling; Pulley 11: Contacts the belt and tensions the belt; Deep groove ball bearing 12: The pulley 11 rolls to increase the bearing life; Shaft bolt 13: Connects the bracket 1 and the pulley 11; Dust cover 14: Dust-proof; Circlip 15: Limits the position of the pulley 11.

[0034] Specific Embodiment 3: Implementation Principle of High Compatibility Universal Structure Tensioner First, the support sleeve 10 and the support plate 1 are fixed together by the knurling at both ends of the central shaft sleeve 5. One end of the spring 8 is fixed to the spring limit block of the support sleeve 10, and the other end is connected to the spring limit block of the support plate 1 to ensure rotation, so as to meet the requirement of the tension pulley providing torque. An interference fit is used to press the sliding bearing 4 between the support plate 1 and the central shaft sleeve 5, so that the support plate 1 and the outer ring of the sliding bearing 4 become an integral body, and it rotates around the central shaft sleeve 5. The installation angle of the tension pulley is adjusted by the positioning bolt 7. A bearing positioning step for the deep groove ball bearing 12 is provided at one end of the support plate 1 to ensure the normal rotation of the pulley 11 outside the bearing. All parts are connected as a whole by the central shaft 5 and the support sleeve 10 through knurling.

[0035] Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only to illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-adaptability universal structure tension pulley, characterized in that, It includes a support plate (1), a first snap ring (2), a second snap ring (3), a sliding bearing (4), a central bushing (5), a positioning bolt (7), a spring (8), a central bolt (9), a support sleeve (10), a pulley (11), a deep groove ball bearing (12), a shaft bolt (13), a dust cover (14), a retaining ring (15); The support plate (1) and the support sleeve (10) are fixedly connected through the central bushing (5); One end of the spring (8) is connected to the support sleeve (10), and the other end is connected to the support plate (1); An interference fit is used to press the sliding bearing (4) between the support plate (1) and the central bushing (5), enabling the support plate (1) to rotate around the center of the central bushing (5); A first snap ring (2) is also provided between the support sleeve (10) and the spring (8); The second snap ring (3) is sleeved on the first snap ring sleeve (2); The positioning bolt (7) adjusts the installation angle of the tensioner pulley; The central bolt (9) fixes the central position of the tensioner pulley; The pulley (11) is connected to the deep groove ball bearing (12), and the retaining ring (15) limits the pulley (11); The support plate (1) and the pulley (11) are connected through a shaft bolt (13).

2. The high-adaptability universal structure tension pulley according to claim 1, characterized in that, A dust-proof and wear-reducing sleeve ring (6), a spring limit block, and a bearing positioning step are provided on the upper end surface of the support plate (1).

3. The high-adaptability universal structure tension pulley according to claim 2, characterized in that One end of the spring (8) is fixed to the spring limit block of the support sleeve (10), and the other end is connected to the spring limit block of the support plate (1).

4. The high-adaptability universal structure tension pulley according to claim 1, characterized in that The support plate (1) and the support sleeve (10) are fixedly connected through the knurling at both ends of the central bushing (5).

5. The high-adaptability universal structure tension pulley according to claim 1, characterized in that, The pulley (11) contacts the belt to tension the belt; The deep groove ball bearing (12) drives the pulley (11) to roll; The support sleeve (10) is fixed on the engine.

6. The high-adaptability universal structure tensioner according to claim 1, characterized in that, The dust cover (14) includes a metal fully sealed dust cover and a labyrinth dust cover; The metal fully sealed dust cover is arranged at the front end of the sliding bearing (4); The labyrinth dust cover is arranged at the rear end of the sliding bearing (4).

7. The high-adaptability universal structure tension pulley according to claim 1, characterized in that The spring (8) is a detachable structure. By replacing the spring (8) with different diameters, the torque value of the tensioner pulley can be adjusted.

8. The high-adaptability universal structure tension pulley according to claim 1, characterized in that, The pulley (11) is a detachable structure. By replacing the pulley (11) with different diameters and widths, the tensioner pulley can be adjusted to adapt to different belt types in different gear trains.

9. The high-adaptability universal structure tension pulley according to claim 1, wherein, The central bushing (5) is a detachable structure. By replacing the central bushing (5) with different heights, the tensioner pulley can be adjusted to adapt to the installation height in different gear trains.

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