Engine front end wheel train arrangement structure
By designing the pulley system structure that drives the dual air conditioning compressor at the front end of the engine, the problem of excessive belt load is solved, and the normal operation of the dual air conditioning system and the belt life extension are achieved.
Patent Information
- Application Number
- CN202421325373.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-12
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-06-12
AI Technical Summary
When the engine is equipped with a refrigerated truck, directly adding air conditioning pulleys will cause the front-end accessory wheel train to drive too much, resulting in excessive belt drive load and breaking and failure.
An engine front end wheel system arrangement structure is designed, including a generator pulley, a crankshaft pulley, a water pump pulley, an air conditioning pulley set and an idler set. The first and second air conditioning compressors are driven by the first and second belts respectively, and the first and second air conditioning compressors are driven by the first and second belts, respectively. Tightening wheels and adjustment screws adjust belt tension to avoid excessive loading of single belts.
The normal operation of the dual air conditioning system is achieved, the belt breakage is avoided, the belt life is extended, and the engine modification efficiency is improved.
Smart Images
Figure CN222296366U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of engines, in particular to a front end gear train arrangement structure of an engine. Background Art
[0002] The front wheel system of a general engine usually includes crankshaft pulley, water pump pulley, generator pulley, air conditioning pulley, idler pulley, tensioner pulley and belt. When the engine is equipped with a refrigerated truck, an air conditioning pulley will be added to the above wheel system to form a dual air conditioning system. If the air conditioning pulley is directly added to the existing structure, the driving power of the front accessory wheel system will be increased, which may easily lead to excessive belt drive load and breakage. Therefore, a dual belt accessory wheel system structure is urgently needed to overcome the above defects. Utility Model Content
[0003] In view of the above problems, the utility model provides a front end gear train arrangement structure of an engine.
[0004] In order to achieve the above-mentioned invention object, the technical solution adopted by the utility model is as follows:
[0005] Provided is an engine front end gear train arrangement structure, including a generator pulley, a crankshaft pulley, a water pump pulley, an air conditioner pulley group and an idler pulley group rotatably arranged at the front end of the engine;
[0006] The air conditioning pulley assembly includes a first air conditioning pulley and a second air conditioning pulley, the first air conditioning pulley and the second air conditioning pulley are respectively connected to a first air conditioning compressor and a second air conditioning compressor on the engine, the crankshaft pulley is connected to the engine crankshaft, the generator pulley is connected to the generator, and the water pump pulley is connected to the water pump;
[0007] A first belt is wound around the crankshaft pulley, the water pump pulley and the first air-conditioning pulley;
[0008] A second pulley is wound around the crankshaft pulley, the generator pulley and the second air-conditioning pulley;
[0009] The first pulley and the second pulley are both guided and driven by an idler pulley set.
[0010] Furthermore, it also includes a tensioning wheel, a slider is linearly slidably arranged at the front end of the engine, the tensioning wheel is rotatably arranged on the slider, a driving member for driving the slider to move is arranged on the engine, and the first belt is wound around the tensioning wheel.
[0011] Furthermore, the driving member includes an adjusting screw, which is threadedly connected to the engine, the screw is arranged parallel to the sliding direction of the slider, and one section of the screw is rotationally connected to the slider.
[0012] Furthermore, the second air-conditioning compressor is detachably connected to the engine, and when the second air-conditioning compressor is detached, the second belt is wound around the crankshaft pulley and the generator pulley.
[0013] Furthermore, both the first belt and the second belt are PK multi-V belts, and the crankshaft pulley is a double-layer multi-PK multi-V belt pulley.
[0014] The beneficial effects of the utility model are as follows: by sleeved the first belt and the second belt on the crankshaft pulley, the first belt and the second belt respectively drive the first air-conditioning compressor and the second air-conditioning compressor, so that the engine can be started and the dual air conditioners can be driven to operate. During the operation, the two belts respectively bear the operating loads of the two compressors, avoiding the belts from breaking due to excessive load and extending the service life of the belts. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a schematic diagram of the gear train arrangement structure when two air-conditioning compressors are installed on the engine of an embodiment of the present application.
[0016] Figure 2 This is a schematic diagram of the gear train arrangement structure when an air-conditioning compressor is installed on the engine of an embodiment of the present application.
[0017] Among them, 1. crankshaft pulley; 2. first idler pulley; 3. water pump pulley; 4. tensioner pulley; 5. first air-conditioning pulley; 6. first belt; 7. generator pulley; 8. second idler pulley; 9. second air-conditioning pulley; 10. second belt. DETAILED DESCRIPTION
[0018] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0019] The present application embodiment discloses a front end gear train arrangement structure of an engine, referring to Figure 1 , Figure 2 , including a generator pulley 7, a crankshaft pulley 1, a water pump pulley 3, an air conditioning pulley group and an idler pulley group, the air conditioning pulley group includes a first air conditioning pulley 5 and a second air conditioning pulley 9, and the idler pulley group includes a first idler pulley 2 and a second idler pulley 8. The first air conditioning pulley 5 and the second air conditioning pulley 9 are respectively connected to the first air conditioning compressor and the second air conditioning compressor on the engine, the crankshaft pulley 1 is connected to the engine crankshaft, the generator pulley 7 is connected to the generator, and the water pump pulley 3 is connected to the water pump input shaft of the engine.
[0020] In the embodiment of the present application, two belt positions are arranged on the crankshaft pulley 1. In the first pulley system, the crankshaft pulley 1, the water pump pulley 3, the first air conditioning pulley 5 and the first idler pulley 2 are wound with a first belt 6. In the second pulley system, the crankshaft pulley 1, the generator pulley 7, the second air conditioning pulley 9 and the second idler pulley 8 are wound with a second belt 10. The first idler pulley 2 and the second idler pulley 8 are used to guide the transmission of the first belt 6 and the second belt 10. When the engine crankshaft moves, the crankshaft pulley 1 is driven to rotate. During the rotation of the crankshaft pulley 1, the generator pulley 7 and the second air conditioning pulley 9 in the first pulley system and the generator pulley 7 and the second air conditioning pulley 9 in the second pulley system are respectively driven to rotate. By driving the first air conditioning pulley 5 and the second air conditioning pulley 9 to rotate respectively through the first belt 6 and the second belt 10, the load on a single belt can be reduced, and the belt can be prevented from breaking during the process of driving the first air conditioning pulley 5 and the second air conditioning pulley 9 at the same time.
[0021] In the embodiment of the present application, a tensioning wheel 4 is also provided at the front end of the engine, and the first belt 6 is wound around the tensioning wheel 4. A slider is linearly slidably installed at the front end of the engine, and the tensioning wheel 4 is rotatably installed on the slider. The engine is provided with a driving member for driving the slider to move and moving the tensioning wheel 4 to tighten / relax the first belt 6. In the embodiment of the present application, the driving member includes an adjusting screw. A slide groove for sliding the slider is provided at the front end of the engine, and a threaded hole adapted to the adjusting screw is provided on the inner wall at one end of the slide groove. The adjusting screw is rotatably connected to the slider after passing through the threaded hole, and the adjusting screw is threadably matched with the threaded hole.
[0022] Furthermore, the second air-conditioning compressor is detachably connected to the engine. After the second air-conditioning compressor is disassembled, a shorter belt can be selected as the second belt 10 to be wound around the crankshaft pulley 1 and the generator pulley 7. Specifically, a mounting notch and a connecting flange for the second air-conditioning compressor are reserved on the casing of the engine. When installing the second air-conditioning compressor, it is only necessary to install the second air-conditioning compressor into the mounting notch of the engine and connect and fix the second air-conditioning compressor to the connecting flange on the engine by bolts. This method can flexibly select the second air-conditioning compressor for the engine. When customizing the vehicle, there is no need to change the engine structure. It is only necessary to install or disassemble the second air-conditioning compressor in a targeted manner and select the second belt 10 of a suitable length, thereby improving the efficiency of engine modification.
[0023] In the embodiment of the present application, the first belt 6 and the second belt 10 are both PK multi-V belts, and the crankshaft pulley 1 is a double-layer multi-PK multi-V belt pulley, which has a stable and reliable transmission effect.
[0024] It should be understood by those skilled in the art that, although preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they are aware of the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention. Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.
Claims
1. An engine front end gear train arrangement structure, characterized in that: It comprises a generator pulley (7) rotatably arranged at the front end of the engine, a crankshaft pulley (1), a water pump pulley (3), an air conditioner pulley group and an idler pulley group; The air conditioning pulley assembly comprises a first air conditioning pulley (5) and a second air conditioning pulley (9), wherein the first air conditioning pulley (5) and the second air conditioning pulley (9) are respectively connected to a first air conditioning compressor and a second air conditioning compressor on the engine, the crankshaft pulley (1) is connected to the engine crankshaft, the generator pulley (7) is connected to the generator, and the water pump pulley (3) is connected to the water pump; A first belt (6) is wound around the crankshaft pulley (1), the water pump pulley (3) and the first air-conditioning pulley (5); A second belt pulley (10) is wound around the crankshaft pulley (1), the generator pulley (7) and the second air-conditioning pulley (9); The first belt pulley (6) and the second belt pulley (10) are both guided and driven by an idler pulley set.
2. The engine front end gear train arrangement structure according to claim 1, characterized in that: It also includes a tensioning wheel (4), a slider is linearly slidably arranged at the front end of the engine, the tensioning wheel (4) is rotatably arranged on the slider, a driving member for driving the slider to move is arranged on the engine, and the first belt (6) is wound around the tensioning wheel (4).
3. The engine front end gear train arrangement structure according to claim 2, characterized in that: The driving member comprises an adjusting screw rod, the adjusting screw rod is threadedly connected to the engine, the screw rod is arranged parallel to the sliding direction of the slider, and a section of the screw rod is rotationally connected to the slider.
4. The engine front end gear train arrangement structure according to claim 2, characterized in that: The second air-conditioning compressor is detachably connected to the engine. When the second air-conditioning compressor is detached, the second belt (10) is wound around the crankshaft pulley (1) and the generator pulley (7).
5. The engine front end gear train arrangement structure according to claim 1, characterized in that: The first belt (6) and the second belt (10) are both PK multi-V belts, and the crankshaft pulley (1) is a double-layer multi-PK multi-V belt pulley.