A transmission structure and drive system for engine front-end accessories of refrigerated vehicles

Abstract

The utility model discloses a front-end accessory transmission structure and drive system for a refrigerated vehicle engine, which adopts two transmission belts for transmission, has a compact structure, a long service life, and avoids premature wear of the wheel system bearing. The front-end accessory transmission structure for the refrigerated vehicle engine includes a mounting surface and a crankshaft pulley, a first air-conditioning compressor pulley, a generator pulley, a fan pulley, a steering pump pulley, a water pump pulley, and a second air-conditioning compressor pulley, all of which are arranged on the mounting surface; the crankshaft pulley, the first air-conditioning compressor pulley, the generator pulley, and the fan pulley are connected by a first transmission belt transmission; the crankshaft pulley, the steering pump pulley, the water pump pulley, and the second air-conditioning compressor pulley are connected by a second transmission belt transmission.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration drive for refrigerated vehicles, in particular to a transmission structure and a drive system for a front-end accessory of an engine for a refrigerated vehicle. Background Art

[0002] With the development of cold chain logistics, more engines are used in refrigerated trucks, which requires adding a second air conditioner to the front wheel system of the engine to meet the cooling needs of the freezer compartment. The drive device of the front-end accessories of the diesel engine currently used usually only has one air conditioner, and usually uses a transmission belt to realize the transmission between multiple components. It cannot take into account the independent cooling of the cab and the freezer compartment. In addition, its conveyor belt is long, there are more driven components, and the tension force required is large, resulting in greater force on the conveyor belt, which is prone to belt breakage and premature wear of the wheel system bearings. Utility Model Content

[0003] The utility model aims to overcome the shortcomings of the existing refrigerated trucks that the transmission belt is long and easy to break and the wheel bearings are worn prematurely when the single transmission is adopted, and to provide a transmission structure and drive system for the front-end accessories of the engine for refrigerated trucks, which adopts two transmission belts for transmission, has a compact structure, a long service life, and avoids premature wear of the wheel bearings.

[0004] The purpose of the utility model is achieved through the following technical solutions:

[0005] The utility model provides a first aspect of a refrigerated vehicle engine front-end accessory transmission structure, comprising a mounting surface and a crankshaft pulley, a first air-conditioning compressor pulley, a generator pulley, a fan pulley, a steering pump pulley, a water pump pulley, and a second air-conditioning compressor pulley, all of which are arranged on the mounting surface;

[0006] The crankshaft pulley, the first air-conditioning compressor pulley, the generator pulley, and the fan pulley are connected by a first transmission belt transmission;

[0007] The crankshaft pulley, the steering pump pulley, the water pump pulley and the second air-conditioning compressor pulley are connected by a second transmission belt.

[0008] The second aspect of the utility model provides a refrigerated vehicle engine front-end accessory drive system, comprising a refrigerated vehicle engine front-end accessory drive structure as described in the first aspect, and an engine connected to a first air-conditioning compressor pulley and a second air-conditioning compressor pulley;

[0009] The engine has two outputs, and clutch structures are respectively arranged between the two outputs and the first air-conditioning compressor pulley and the second air-conditioning compressor pulley.

[0010] The utility model has the following advantages:

[0011] 1. This solution uses two transmission belts to realize the transmission of two air-conditioning drive wheel systems respectively, and separates the two air-conditioning compressor pulleys with the largest rotational inertia in the two air-conditioning drive wheel systems, avoiding the belt being too long, reducing the components driven by a single belt, and avoiding excessive belt tension, thereby ensuring the durability and reliability of the belt, avoiding premature wear of the bearings of the wheel system related components, and extending the service life.

[0012] 2. This solution realizes that cold air can be supplied to the vehicle cockpit and refrigerated compartment at the same time through one engine assembly, and the two air conditioners can be controlled independently, which solves the problem that refrigeration requires an independent air-conditioning compressor to be configured outside the engine assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention 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 present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 The utility model is a structural schematic diagram of a transmission structure of an engine front end accessory for a refrigerated vehicle. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0016] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0017] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features thereof may be combined with each other.

[0018] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0019] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use, or the positions or positional relationships commonly understood by those skilled in the art, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0020] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] The utility model discloses a front-end accessory transmission structure and a driving system for a refrigerated vehicle engine. The front-end accessory driving system for a refrigerated vehicle engine comprises the front-end accessory transmission structure for the refrigerated vehicle engine and an engine.

[0022] Specifically, Figure 1 As shown, the front-end accessory transmission structure of the refrigerated vehicle engine includes a mounting surface and a crankshaft pulley 1, a first air-conditioning compressor pulley 3, a generator pulley 5, a fan pulley 8, a steering pump pulley 10, a water pump pulley 11, and a second air-conditioning compressor pulley 12, all mounted on the mounting surface. Among them, the crankshaft pulley 1, the first air-conditioning compressor pulley 3, the generator pulley 5, and the fan pulley 8 are connected by a first transmission belt 7 to form a first air-conditioning drive gear train. The crankshaft pulley 1, the steering pump pulley 10, the water pump pulley 11, and the second air-conditioning compressor pulley 12 are connected by a second transmission belt 13 to form a second air-conditioning drive gear train.

[0023] Among them, the crankshaft pulley 1 is used to be connected to the crankshaft of the refrigerated truck to drive the crankshaft to rotate; the first air-conditioning compressor pulley 3 is used to drive the first air-conditioning compressor of the refrigerated truck; the generator pulley 5 is used to drive the generator of the refrigerated truck; the fan pulley 8 is used to drive the fan of the refrigerated truck, the steering pump pulley 10 is used to drive the steering pump of the refrigerated truck; the water pump pulley 11 is used to drive the water pump of the refrigerated truck; the second air-conditioning compressor pulley 12 is used to drive the second air-conditioning compressor of the refrigerated truck.

[0024] The first air-conditioning compressor is an air-conditioning compressor for cooling the cab, and the second air-conditioning compressor is an air-conditioning compressor for cooling the freezer compartment.

[0025] The engine has two outputs and a clutch structure is provided between the two outputs and the first air-conditioning compressor pulley 3 and the second air-conditioning compressor pulley 12 of the transmission structure, so as to realize the driving of a single air-conditioning compressor or the simultaneous driving control of two air-conditioning compressors. For example, the engine can be a D20TCIF series engine, such as D20TCIF1, D20TCIF2, D20TCIF11, D20TCIF12, D20TCIF61, etc.

[0026] The above system includes two air-conditioning compressors, which can supply cold air to the vehicle cockpit and the refrigerated compartment at the same time through one engine assembly, and the two air conditioners can be controlled independently, solving the problem that refrigeration requires an independent air-conditioning compressor outside the engine assembly.

[0027] Two transmission belts are used to respectively realize the transmission of the two air-conditioning drive wheel systems, and the two air-conditioning compressor pulleys with the largest rotational inertia are separated in the two air-conditioning drive wheel systems, which avoids the belt being too long, reduces the components driven by a single belt, and avoids excessive belt tension, thereby ensuring the durability and reliability of the belt, avoiding premature wear of the bearings of related parts of the wheel system, and extending the service life.

[0028] In order to further make the transmission structure suitable for smaller longitudinal engine refrigerated vehicles, such as Figure 1 As shown, the axes of the crankshaft pulley 1 and the fan pulley 8 are placed on the same plane, the first air-conditioning compressor pulley 3 and the generator pulley 5 are placed on one side of the plane, and the steering pump pulley 10, the water pump pulley 11 and the second air-conditioning compressor pulley 12 are placed on the other side of the plane. The above layout makes the structure compact.

[0029] In order to improve the transmission performance of the transmission belt, a first tensioning wheel 4 for tensioning the first transmission belt 7 and a second tensioning wheel 9 for tensioning the second transmission belt 13 are also included.

[0030] In order to facilitate the adjustment of the tension, the first tensioning wheel 4 is arranged in an adjustment slot. The tension adjustment is achieved by adjusting the position where the first tensioning wheel is fixed in the adjustment slot.

[0031] The first tensioning wheel 4 is preferably arranged between the first air-conditioning compressor pulley and the generator pulley to make the structure of the entire transmission structure more compact.

[0032] An idler wheel is also provided on the first transmission belt 7. For example, Figure 1As shown, the idler wheel includes a first idler wheel 2 and a second idler wheel 6 , which are respectively disposed between the crankshaft pulley 1 and the first air-conditioning compressor pulley 3 , and between the generator pulley 5 and the fan pulley 8 .

[0033] The second tensioning wheel 9 is preferably arranged between the crankshaft pulley 1 and the steering pump pulley 10 to make the structure of the entire transmission structure more compact.

[0034] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. 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 transmission structure for the front end accessories of an engine for a refrigerated vehicle, characterized in that: It comprises a mounting surface and a crankshaft pulley (1), a first air-conditioning compressor pulley (3), a generator pulley (5), a fan pulley (8), a steering pump pulley (10), a water pump pulley (11), and a second air-conditioning compressor pulley (12), all of which are mounted on the mounting surface; The crankshaft pulley (1), the first air-conditioning compressor pulley (3), the generator pulley (5), and the fan pulley (8) are connected in transmission via a first transmission belt (7); The crankshaft pulley (1), the steering pump pulley (10), the water pump pulley (11), and the second air-conditioning compressor pulley (12) are connected in transmission via a second transmission belt (13).

2. The engine front end accessory transmission structure for a refrigerated vehicle according to claim 1, characterized in that: The axes of the crankshaft pulley (1) and the fan pulley (8) are placed on the same plane, the first air-conditioning compressor pulley (3) and the generator pulley (5) are placed on one side of the plane, and the steering pump pulley (10), the water pump pulley (11) and the second air-conditioning compressor pulley (12) are placed on the other side of the plane.

3. The engine front end accessory transmission structure for a refrigerated vehicle according to claim 1, characterized in that: It also includes a first tensioning wheel (4) for tensioning the first transmission belt (7).

4. The engine front end accessory transmission structure for a refrigerated vehicle according to claim 3, characterized in that: The first tensioning wheel (4) is arranged in an adjustment groove.

5. The engine front end accessory transmission structure for a refrigerated vehicle according to claim 3, characterized in that: An idler wheel is also provided on the first transmission belt (7).

6. The engine front end accessory transmission structure for a refrigerated vehicle according to claim 1, characterized in that: It also includes a second tensioning wheel (9) for tensioning the second transmission belt (13).

7. The transmission structure for the front-end accessories of the engine for a refrigerated vehicle according to claim 6, characterized in that: The second tensioning wheel (9) is disposed between the crankshaft pulley (1) and the steering pump pulley (10).

8. An engine front-end accessory drive system for a refrigerated vehicle, characterized in that: An engine comprising a front-end accessory transmission structure for a refrigerated vehicle engine as claimed in any one of claims 1 to 7, and an engine connected to a first air-conditioning compressor pulley (3) and a second air-conditioning compressor pulley (12); The engine has two outputs, and clutch structures are respectively provided between the two outputs and the first air-conditioning compressor pulley (3) and the second air-conditioning compressor pulley (12).

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