High-reliability engine belt transmission tensioning device

Abstract

The high-reliability engine belt transmission tensioning device comprises a driving belt wheel, a driven belt wheel and a transmission belt, the transmission belt is connected between the driving belt wheel and the driven belt wheel in a sleeved mode, and tensioning wheel assemblies are arranged on the upper edge and the lower edge of the inner side of the transmission belt respectively. The tensioning wheel assembly comprises a tensioning wheel, two rolling bearings, a supporting shaft and a middle cushion block, the outer side face of the supporting shaft is sleeved with the tensioning wheel, the two rolling bearings are symmetrically arranged between the supporting shaft and the tensioning wheel, and the middle cushion block is arranged between the two rolling bearings. According to the high-reliability engine belt transmission tensioning device, violent shaking of the transmission belt can be avoided, the transmission reliability is improved, and rapid damage to the transmission belt and a transmitted part is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission, in particular to a high-reliability engine belt transmission tensioning device. Background Art

[0002] In the engine, in order to meet the functions of cooling, lubrication, starting, etc., it is necessary to install accessories such as fresh water pumps, sea water pumps, charging generators, oil pumps, etc. The transmission method of these components is usually gear drive or belt drive.

[0003] At present, engines are developing towards high strength and compactness. Compared with gear transmission, belt transmission is more flexible to install and has less space restrictions. It is generally arranged on both sides of the free end of the engine and is adopted by many compact engines. In engines with belt transmission, many belts have large spans. During operation, the relevant parts of the belt transmission device are very likely to resonate at the operating speed, which will cause the transmission belt to shake, the belt and pulley to wear more, and even cause damage to the belt and the driven parts. Summary of the invention

[0004] The technical problem to be solved by the utility model is to overcome the existing defects and provide a high-reliability engine belt drive tensioner, which can avoid severe shaking of the drive belt, improve transmission reliability, avoid rapid damage to the drive belt and driven parts, and effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-reliability engine belt drive tensioner, comprising a driving pulley, a driven pulley and a transmission belt, wherein the transmission belt is sleeved between the driving pulley and the driven pulley, and a tensioner pulley assembly is provided on the inner upper and lower sides of the transmission belt, and the tensioner pulley assembly comprises a tensioner pulley, a rolling bearing, a support shaft and an intermediate pad, wherein the tensioner pulley is sleeved on the outer side surface of the support shaft, the number of the rolling bearings is two, and the two rolling bearings are symmetrically arranged between the support shaft and the tensioner pulley, and the intermediate pad is arranged between the two rolling bearings.

[0006] As a preferred technical solution of the utility model, the interior of the tensioner is sequentially provided with a step hole I, a step hole II and a step hole III, the step hole I, the step hole II and the step hole III are connected, the rolling bearing is installed in the step hole II, and an axial retaining ring is installed in the step hole III.

[0007] As a preferred technical solution of the utility model, the outer side surface of the tensioner is provided with a wheel groove matched with the transmission belt.

[0008] As a preferred technical solution of the utility model, the rolling bearing is a deep groove ball bearing.

[0009] As a preferred technical solution of the utility model, a connector is arranged between the two tensioner wheel assemblies, and the connector is provided with two threaded holes and four stepped holes IV. The interior of the support shaft is a hollow structure. The support shafts in the two tensioner wheel assemblies are respectively threadedly connected with the threaded holes on the connector through fastening screws, and the four stepped holes IV are respectively connected with the engine body through connecting screws.

[0010] As a preferred technical solution of the utility model, an adjustment pad is provided between the tensioner and the connector.

[0011] Compared with the prior art, the beneficial effects of the utility model are: the high-reliability engine belt drive tensioner is reasonably designed and easy to operate. By arranging tensioner pulley assemblies on the upper and lower sides of the inner side of the transmission belt, the tensioner pulley is used to support the transmission belt, thereby avoiding the transmission belt from shaking and improving the reliability of the transmission belt. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a layout diagram of the tensioner assembly of the utility model;

[0013] Figure 2 It is a structural schematic diagram of the tensioner pulley assembly;

[0014] Figure 3 It is a structural schematic diagram of the tensioner;

[0015] Figure 4 Schematic diagram of the connector structure.

[0016] In the figure: 1 driving pulley, 2 driven pulley, 3 transmission belt, 4 tensioner assembly, 5 tensioner, 6 rolling bearing, 7 support shaft, 8 fastening screw, 9 intermediate pad, 10 axial retaining ring, 11 adjustment pad, 12 connector, 13 stepped hole I, 14 wheel groove, 15 stepped hole II, 16 stepped hole III, 17 threaded hole, 18 stepped hole IV. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments (for the convenience of description and understanding, the following is a schematic diagram of the present invention). Figure 2 The top is above, Figure 2 Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0018] See also Figure 1-4 The utility model provides a technical solution: a highly reliable engine belt transmission tensioner, comprising a driving pulley 1, a driven pulley 2 and a transmission belt 3, wherein the transmission belt 3 is sleeved between the driving pulley 1 and the driven pulley 2, the driving pulley 1 is mounted on the engine crankshaft shaft system, and the driven pulley 2 is mounted on shafts such as an oil pump, a fresh water pump, a seawater pump, and a charging generator, and the driving pulley 1 usually rotates clockwise. At this time, the lower side of the transmission belt 3 is a tight side, and the upper side of the transmission belt 3 is a loose side. There are two tensioner assemblies 4, which are respectively arranged on the inner side of the loose side and the tight side;

[0019] The tensioner assembly 4 includes a tensioner 5, a rolling bearing 6, a support shaft 7 and an intermediate pad 9. The tensioner 5 is a rotary part. The outer side of the tensioner 5 is provided with a wheel groove 14 adapted to the transmission belt 3 for driving the transmission belt 3. Preferably, the wheel groove 14 can be a V-belt pulley groove. The interior of the tensioner 5 is sequentially provided with a stepped hole I13, a stepped hole II15 and a stepped hole III16. The stepped hole I13, the stepped hole II15 and the stepped hole III16 are connected. Two rolling bearings 6 are installed in the stepped hole II15. The intermediate pad 9 is a circular ring structure, which is installed between the two rolling bearings 6 and fits with the end faces of the two rolling bearings 6 respectively. Grease is added to the rolling bearing 6 through the stepped hole I13. The outer circle of the rolling bearing 6 and the stepped hole II15 are transitionally matched. The support shaft 7 is a rotary shaft part, the interior of which is a hollow structure, and the support shaft 7 and the inner ring of the rolling bearing 6 are transitionally matched.

[0020] A connector 12 is provided between the two tensioner wheel assemblies 4, and the connector 12 is provided with two threaded holes 17 and four stepped holes IV18. The interior of the support shaft 7 is a hollow structure. The support shafts 7 in the two tensioner wheel assemblies 4 are respectively threadedly connected with the threaded holes 17 on the connector 12 through the fastening screws 8, and the four stepped holes IV18 are respectively connected with the engine body through the connecting screws to achieve the fastening of the tensioner wheel assembly 4.

[0021] Furthermore, in order to limit the axial displacement of the rolling bearing 6 , an axial retaining ring 10 is installed in the stepped hole III16 .

[0022] Furthermore, in order to improve the support strength of the tensioner 5 and ensure that the tensioner 5 does not have axial deflection when rotating at high speed, the rolling bearing 6 is a deep groove ball bearing.

[0023] Furthermore, in order to prevent the rolling bearing 6 from getting stuck in the axial direction when the rolling bearing 6 is running at a high speed, an adjusting spacer 11 is provided between the tensioner 5 and the connecting body 12 .

[0024] When in use: first heat the tensioner 5 to a certain temperature, without applying external force, install the rolling bearing 6 on the left, the middle pad 9, the rolling bearing 6 on the right, and the axial retaining ring 10 in sequence; then use the support shaft 7 to pass through the inner rings of the two rolling bearings 6, the middle pad 9, the axial retaining ring 10 and the adjustment pad 11, and fasten the tensioner assembly 4 to the connector 12 by tightening screws 8. During the installation process, the thickness of the adjustment pad 11 is reasonably selected to ensure the working clearance of the rolling bearing. After the two tensioner assemblies 4 are installed on the connector 12, they are installed in the engine as a whole to realize the installation of the belt drive tensioner.

[0025] In the utility model, the tensioner 5 is installed on the loose side and the tight side of the transmission belt 3 to avoid the resonance of the system, avoid the shaking of the transmission belt 3 and related components, ensure the high reliability of the belt transmission system, and extend the service life of related components.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A highly reliable engine belt drive tensioner, comprising a driving pulley (1), a driven pulley (2) and a transmission belt (3), wherein the transmission belt (3) is sleeved between the driving pulley (1) and the driven pulley (2), and characterized in that: A tensioner pulley assembly (4) is provided on the upper and lower sides of the inner side of the transmission belt (3). The tensioner pulley assembly (4) comprises a tensioner pulley (5), a rolling bearing (6), a support shaft (7) and an intermediate pad (9). The tensioner pulley (5) is sleeved on the outer side of the support shaft (7). There are two rolling bearings (6), which are symmetrically arranged between the support shaft (7) and the tensioner pulley (5). The intermediate pad (9) is arranged between the two rolling bearings (6).

2. A highly reliable engine belt drive tensioner according to claim 1, characterized in that: The tensioner (5) is provided with a stepped hole I (13), a stepped hole II (15) and a stepped hole III (16) in sequence, the stepped hole I (13), the stepped hole II (15) and the stepped hole III (16) are connected, the rolling bearing (6) is installed in the stepped hole II (15), and an axial retaining ring (10) is installed in the stepped hole III (16).

3. A highly reliable engine belt drive tensioner according to claim 1, characterized in that: The outer side surface of the tension wheel (5) is provided with a wheel groove (14) adapted to the transmission belt (3).

4. A highly reliable engine belt drive tensioner according to claim 1, characterized in that: The rolling bearing (6) is a deep groove ball bearing.

5. The high-reliability engine belt drive tensioner according to claim 1, characterized in that: A connecting body (12) is arranged between the two tension wheel assemblies (4), and the connecting body (12) is provided with two threaded holes (17) and four stepped holes IV (18). The interior of the support shaft (7) is a hollow structure. The support shafts (7) in the two tension wheel assemblies (4) are respectively threadedly connected with the threaded holes (17) on the connecting body (12), and the four stepped holes IV (18) are respectively connected with the engine body through connecting screws.

6. A highly reliable engine belt transmission tensioner according to claim 5, characterized in that: An adjustment pad (11) is provided between the tensioner wheel (5) and the connecting body (12).

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