Eccentric V-belt tensioning wheel mechanism

Abstract

The utility model belongs to the technical field of engine transmission, and discloses an eccentric V-belt tensioning wheel mechanism which comprises a tensioning wheel base, a shaft sleeve is arranged on the tensioning wheel base, a V-belt wheel is coaxially assembled on the shaft sleeve through a rolling bearing, and a fastening bolt is arranged on the tensioning wheel base. The fastening bolt is used for fixing the tensioning wheel base on the mounting main body at a set angle, the fastening bolt penetrates through the shaft sleeve and is in threaded connection with the tensioning wheel base, an eccentric hole for the fastening bolt to penetrate through is formed in the shaft sleeve, and the wheel center positions of the V-belt wheel are different at different set angles. According to the eccentric V-belt tensioning wheel mechanism, the tensioning wheel base can be fixed at the set angle relative to the mounting body through the fastening bolt, the shaft sleeve and the V-belt wheel are eccentrically arranged, so that the V-belt wheel can rotate with the fastening bolt as the center, position adjustment of the V-belt wheel is achieved, a belt matched with the V-belt wheel is kept tensioned, and the service life of the V-belt wheel is prolonged. The problem of engine failure caused by belt looseness in a traditional transmission mechanism is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of engine transmission, in particular to an eccentric V-belt tensioning wheel mechanism. Background Art

[0002] During engine operation, the engine's cooling system, power output system, and electrical output system must be integrated, with the crankshaft's power output driving each gear train. Traditional transmission mechanisms utilize belt drives, relying on tension and friction to transmit motion and power. However, due to long-term belt tension, belts can become loose, causing failures in the cooling system and electrical output system, leading to engine failure, cylinder scuffing, battery failure, and other issues. Utility Model Content

[0003] Based on the above problems, the purpose of the present invention is to provide an eccentric V-belt tensioner mechanism, which is convenient for adjusting and maintaining belt tension, and avoids engine failure caused by belt loosening.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An eccentric V-belt tensioner mechanism includes a tensioner base, a shaft sleeve is provided on the tensioner base, a V-belt pulley is coaxially assembled on the shaft sleeve through a rolling bearing, a fastening bolt is provided on the tensioner base, the fastening bolt is used to fix the tensioner base on the installation body at a set angle, the fastening bolt passes through the shaft sleeve and is threadedly connected to the tensioner base, and an eccentric hole for the fastening bolt to pass through is provided on the shaft sleeve. At different set angles, the wheel center position of the V-belt pulley is different.

[0006] As an optional solution, an arc-shaped groove centered on the fastening bolt is opened on the tensioning wheel base, and a locking bolt fixed to the installation body is passed through the arc-shaped groove. The locking bolt is used to assist in locking the tensioning wheel base.

[0007] As an optional solution, the shaft sleeve and the tensioning wheel base are welded as one body, and the rolling bearing and the shaft sleeve are interference fit.

[0008] As an option, the fastening bolt is clearance-fitted with the eccentric hole.

[0009] As an optional solution, a shoulder is provided on the sleeve to limit one side of the rolling bearing, and a stop washer is provided on the side of the sleeve away from the tensioning wheel base to limit the other side of the rolling bearing. The fastening bolt passes through the stop washer and presses the stop washer against the rolling bearing.

[0010] As an optional solution, the inner ring of the V-belt pulley is provided with a step protrusion for limiting one side of the rolling bearing, and the inner ring of the V-belt pulley is provided with an elastic retaining ring for limiting the other side of the rolling bearing.

[0011] The beneficial effects of the present invention are as follows: the eccentric V-belt tensioner mechanism enables the tensioner base to be fixed at a set angle relative to the mounting body by means of a fastening bolt, and because the shaft sleeve and the V-belt pulley are eccentrically arranged, the V-belt pulley can rotate around the fastening bolt to achieve position adjustment of the V-belt pulley, thereby keeping the belt matched with the V-belt pulley taut, with a simple structure and easy maintenance, solving the problem of engine failure caused by belt loosening in traditional transmission mechanisms, and reducing or even avoiding the risk of major engine failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a structural diagram of an eccentric V-belt tensioner mechanism provided by an embodiment of the present utility model;

[0013] Figure 2 It is a structural cross-sectional view of an eccentric V-belt tensioner mechanism provided by an embodiment of the present utility model.

[0014] In the attached figure:

[0015] 1. Tensioner base; 2. Bushing; 3. Rolling bearing; 4. V-belt pulley; 5. Fastening bolt; 6. Eccentric hole; 7. Arc groove; 8. Locking bolt; 9. Shoulder; 10. Stop washer; 11. Step protrusion; 12. Elastic retaining ring. DETAILED DESCRIPTION

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0017] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0018] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0019] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0020] See also Figure 1 and Figure 2 As shown, this preferred embodiment provides an eccentric V-belt tensioner mechanism, including a tensioner base 1, a shaft sleeve 2 is provided on the tensioner base 1, a V-belt pulley 4 is coaxially assembled on the shaft sleeve 2 through a rolling bearing 3, a fastening bolt 5 is provided on the tensioner base 1, and the fastening bolt 5 is used to fix the tensioner base 1 on the installation body at a set angle. The fastening bolt 5 passes through the shaft sleeve 2 and is threadedly connected to the tensioner base 1. The shaft sleeve 2 is provided with an eccentric hole 6 for the fastening bolt 5 to pass through. At different set angles, the wheel center position of the V-belt pulley 4 is different.

[0021] Therefore, the tensioning pulley base 1 can be fixed at a set angle relative to the installation body by tightening the bolt 5, and since the sleeve 2 and the V-belt pulley 4 are eccentrically arranged, the V-belt pulley 4 can rotate around the tightening bolt 5 to achieve position adjustment of the V-belt pulley 4, so that the belt matched with the V-belt pulley 4 remains tensioned. The structure is simple and maintenance is convenient, which solves the problem of engine failure caused by loose belt in traditional transmission mechanism and reduces or even avoids the risk of major engine failure.

[0022] Optionally, an arc-shaped groove 7 centered on the fastening bolt 5 is provided on the tensioning wheel base 1, and a locking bolt 8 fixed to the installation body is passed through the arc-shaped groove 7. The locking bolt 8 is used to assist in locking the tensioning wheel base 1 to ensure that the tensioning wheel base 1 is reliably fixed at a set angle.

[0023] Optionally, the shaft sleeve 2 and the tensioning wheel base 1 are welded together, and the rolling bearing 3 and the shaft sleeve 2 are interference fit to ensure that the V-belt pulley 4 is reliably installed and not easy to loosen.

[0024] Optionally, the fastening bolt 5 is clearance-matched with the eccentric hole 6 , which facilitates the rotation of the fastening bolt 5 so as to adjust the tensioning wheel base 1 to a set angle.

[0025] Optionally, a shoulder 9 is provided on the sleeve 2 for limiting one side of the rolling bearing 3, and a stop washer 10 is provided on the side of the sleeve 2 away from the tensioning wheel base 1 for limiting the other side of the rolling bearing 3. The fastening bolt 5 passes through the stop washer 10 and presses the stop washer 10 against the rolling bearing 3, so that the rolling bearing 3 and the sleeve 2 are reliably assembled.

[0026] Optionally, a step protrusion 11 is provided on the inner ring of the V-belt pulley 4 to limit one side of the rolling bearing 3, and an elastic retaining ring 12 is provided on the inner ring of the V-belt pulley 4 to limit the other side of the rolling bearing 3, so that the V-belt pulley 4 and the rolling bearing 3 can be reliably assembled.

[0027] Installation process: Loosen the fastening bolt 5 and the installation body, rotate the tensioner base 1 together with the shaft sleeve 2 and the V-belt pulley 4 to the set angle, so that the belt matched with the V-belt pulley 4 is tensioned, and then tighten the fastening bolt 5 and the locking bolt 8 in sequence.

[0028] Among them, the eccentricity between the V-belt pulley 4 and the sleeve 2, the position of the fastening bolt 5 and the locking bolt 8, the position and size of the arc groove 7, the specifications of the belt and the V-belt pulley 4, etc. can all be freely adjusted according to different engine transmission requirements, installation space limitations and the bolt arrangement position on the installation body, with strong adaptability, so that the belt remains tensioned during the transmission process.

[0029] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Eccentric V-belt tensioner mechanism, characterized in that: The invention comprises a tensioning wheel base (1), a shaft sleeve (2) is provided on the tensioning wheel base (1), a V-belt pulley (4) is coaxially assembled on the shaft sleeve (2) through a rolling bearing (3), a fastening bolt (5) is provided on the tensioning wheel base (1), and the fastening bolt (5) is used to fix the tensioning wheel base (1) on the installation body at a set angle, the fastening bolt (5) passes through the shaft sleeve (2) and is threadedly connected to the tensioning wheel base (1), and an eccentric hole (6) for the fastening bolt (5) to pass through is provided on the shaft sleeve (2), and the wheel center position of the V-belt pulley (4) is different at different set angles.

2. The eccentric V-belt tensioner mechanism according to claim 1, characterized in that: An arcuate groove (7) centered on the fastening bolt (5) is provided on the tensioning wheel base (1), and a locking bolt (8) fixed to the mounting body is passed through the arcuate groove (7), and the locking bolt (8) is used to assist in locking the tensioning wheel base (1).

3. The eccentric V-belt tensioner mechanism according to claim 1, characterized in that: The shaft sleeve (2) and the tension wheel base (1) are welded together as a whole, and the rolling bearing (3) and the shaft sleeve (2) are interference fit.

4. The eccentric V-belt tensioner mechanism according to claim 1, characterized in that: The fastening bolt (5) is clearance-matched with the eccentric hole (6).

5. The eccentric V-belt tensioner mechanism according to claim 1, characterized in that: The shaft sleeve (2) is provided with a shaft shoulder (9) for limiting one side of the rolling bearing (3), and the side of the shaft sleeve (2) away from the tensioning wheel base (1) is provided with a stop washer (10) for limiting the other side of the rolling bearing (3), and the fastening bolt (5) passes through the stop washer (10) and presses the stop washer (10) against the rolling bearing (3).

6. The eccentric V-belt tensioner mechanism according to claim 1, characterized in that: The inner ring of the V-belt pulley (4) is provided with a stepped protrusion (11) for limiting one side of the rolling bearing (3), and the inner ring of the V-belt pulley (4) is provided with an elastic retaining ring (12) for limiting the other side of the rolling bearing (3).

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