Crankshaft pulley assembly structure

Abstract

The utility model discloses a crankshaft pulley assembly structure which comprises a hub, a spinning pulley and a cushion block, a hub inner hole is formed in the center position of the hub, a hub key groove is formed in one side of the hub inner hole, a hub spigot is formed in the hub mounting surface of the hub, and the spinning pulley is arranged in the hub key groove. The spinning belt wheel and the cushion block are connected with the installation face of the hub through a short bolt and a long bolt respectively, the spinning belt wheel surrounds the outside of the surrounding range of a hub spigot, the cushion block is located in the surrounding range of the hub spigot, a cushion block spigot is formed in the cushion block installation face of the cushion block, and a cushion block inner hole is formed in the center of the cushion block spigot. The problems that when an existing crankshaft belt pulley needs to be matched with a small-diameter auxiliary wheel or a small-diameter universal joint, the fastening face of a crankshaft belt pulley bolt and a hub is too small, friction force is insufficient, and the crankshaft belt pulley bolt is prone to loosening are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to a crankshaft pulley assembly structure. Background Art

[0002] The diversification of vehicle functions requires that the engine crankshaft pulley structure become more and more compact. Many crankshaft pulleys need to be matched with small-diameter secondary wheels or small-diameter universal joints. When matched with small-diameter secondary wheels or small-diameter universal joints, the fastening surface between the crankshaft pulley bolt and the hub is too small, resulting in insufficient friction. Therefore, during subsequent use, the crankshaft pulley bolt is easy to loosen, causing quality problems such as the crankshaft pulley falling off and being damaged. This problem will cause the quality cost to rise. Therefore, how to overcome the shortcomings of the existing technology is an urgent problem to be solved in the field of engine technology. Utility Model Content

[0003] The utility model aims to provide a crankshaft pulley assembly structure to solve the problem that when the existing crankshaft pulley needs to cooperate with a small-diameter secondary wheel or a small-diameter universal joint, the fastening surface between the crankshaft pulley bolt and the hub is too small, resulting in insufficient friction and the crankshaft pulley bolt is easy to loosen.

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

[0005] A crankshaft pulley assembly structure includes a hub, a spun pulley and a gasket, wherein a hub inner hole is provided at the center of the hub, a hub keyway is provided on one side of the hub inner hole, a hub stop is provided on the hub mounting surface of the hub, the spun pulley and the gasket are connected to the mounting surface of the hub by short bolts and long bolts respectively, the spun pulley surrounds outside the surrounding range of the hub stop, and the gasket is located within the surrounding range of the hub stop, a gasket stop is provided on the gasket mounting surface of the gasket, and a gasket inner hole is provided at the center of the gasket stop.

[0006] In the present scheme, the stop between the hub and the spun pulley is positioned, the stop between the hub and the gasket is positioned, the inner hole of the hub and the keyway of the hub are positioned and connected with the outer circle of the crankshaft and the flat key pressed onto the crankshaft. Overall, the above structure is suitable for the situation where the flange surface of the crankshaft pulley bolt is reduced due to the front-end output of small-diameter secondary wheels or small-diameter universal joints, resulting in insufficient crimping area between the bolt and the hub. By adding a gasket and fastening it to the hub with long bolts, the gasket and the hub form a whole, which facilitates the processing of the crankshaft keyway and increases the crimping area of ​​the crankshaft pulley bolt, thereby improving the anti-loosening performance of the crankshaft pulley bolt. At the same time, by only changing the specifications of the gasket, it is suitable for front-end outputs such as secondary wheels or universal joints with different axial directions and large and small diameters, thereby reducing the overall development cost of the crankshaft pulley and facilitating promotion and application.

[0007] As a further preferred embodiment of the present invention, the diameter of the inner hole of the wheel hub is larger than the diameter of the inner hole of the cushion block.

[0008] As a further preferred embodiment of the present invention, the diameter of the inner hole of the cushion block is larger than the diameter of the crankshaft pulley bolt screw.

[0009] The crimping area between the crankshaft pulley bolt flange and the crankshaft pulley bolt mounting surface of the pad can be effectively increased, thereby increasing the friction force of the bolt and improving the fastening performance.

[0010] As a further preferred embodiment of the present invention, there are six short bolts.

[0011] As a further preferred embodiment of the present invention, there are four long bolts.

[0012] It is firm and reliable, and can prevent the relative displacement between the pad and the hub when the crankshaft pulley is running, thereby preventing the bolt rotation and torque attenuation of the press-fitted pad.

[0013] Compared with the prior art, the utility model can achieve at least one of the following beneficial effects:

[0014] 1. By dividing the wheel hub and the gasket into two parts, the wheel hub and the gasket are not combined into one part, and the problem of the hub keyway being difficult to process during the overall processing is solved. The processability is strong and the promotion is good.

[0015] 2. The wheel hub and the gasket are divided into two parts. By only changing the specifications of the gasket, it can adapt to the front-end outputs such as secondary wheels and universal joints with different shaft diameters and large and small diameters. Only replacing the gasket can effectively reduce the development cost and improve the versatility of the wheel hub and the pulley.

[0016] 3. It can effectively increase the crimping area between the crankshaft pulley bolt flange and the crankshaft pulley bolt mounting surface of the pad, increase the friction force of the bolt, and improve the fastening performance.

[0017] 4. There are four long bolts, which are firm and reliable, avoiding relative displacement between the pad and the hub when the crankshaft pulley is running, thereby avoiding rotation of the bolts of the press-fitted pad and torque attenuation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is an exploded view of the crankshaft pulley assembly structure of the utility model;

[0019] Figure 2 This is a front view of the crankshaft pulley assembly structure of the utility model;

[0020] Figure 3 For this utility model Figure 2 A-direction sectional view;

[0021] 1-wheel hub; 2-spun pulley; 3-short bolt; 4-pad; 5-long bolt; 6-crankshaft pulley bolt; 7-wheel hub keyway; 8-wheel hub inner hole; 9-pad inner hole; 10-crankshaft pulley bolt mounting surface; 11-pad stopper; 12-pad mounting surface; wheel hub stopper-13. DETAILED DESCRIPTION

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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. Specific embodiment 1:

[0029] Figure 1 , Figure 2 , Figure 3 A crankshaft pulley assembly structure is shown, including a hub 1, a spun pulley 2 and a gasket 4. A hub inner hole 8 is provided at the center of the hub 1, a hub keyway 7 is provided on one side of the hub inner hole 8, a hub stop 13 is provided on the hub mounting surface of the hub 1, the spun pulley 2 and the gasket 4 are respectively connected to the mounting surface of the hub 1 by short bolts 3 and long bolts 5, the spun pulley 2 is surrounded outside the surrounding range of the hub stop 13, and the gasket 4 is located within the surrounding range of the hub stop 13, a gasket stop 11 is provided on the gasket mounting surface 12 of the gasket 4, and a gasket inner hole 9 is provided at the center of the gasket stop 11.

[0030] In the present scheme, the stop between the hub and the spun pulley is positioned, the stop between the hub and the gasket is positioned, the inner hole of the hub and the keyway of the hub are positioned and connected with the outer circle of the crankshaft and the flat key pressed onto the crankshaft. Overall, the above structure is suitable for the situation where the flange surface of the crankshaft pulley bolt is reduced due to the front-end output of small-diameter secondary wheels or small-diameter universal joints, resulting in insufficient crimping area between the bolt and the hub. By adding a gasket and fastening it to the hub with long bolts, the gasket and the hub form a whole, which facilitates the processing of the crankshaft keyway and increases the crimping area of ​​the crankshaft pulley bolt, thereby improving the anti-loosening performance of the crankshaft pulley bolt. At the same time, by only changing the specifications of the gasket, it is suitable for front-end outputs such as secondary wheels or universal joints with different axial directions and large and small diameters, thereby reducing the overall development cost of the crankshaft pulley and facilitating promotion and application. Specific embodiment 2:

[0032] This embodiment further illustrates the wheel hub inner hole 8 on the basis of the specific embodiment 1. The diameter of the wheel hub inner hole 8 is greater than the diameter of the cushion block inner hole 9. Specific embodiment 3:

[0034] This embodiment further describes the inner hole 9 of the cushion block on the basis of the specific embodiment 1. The diameter of the inner hole 9 of the cushion block is larger than the diameter of the screw rod of the crankshaft pulley bolt 6 .

[0035] The crimping area between the crankshaft pulley bolt flange and the crankshaft pulley bolt mounting surface of the pad can be effectively increased, thereby increasing the friction force of the bolt and improving the fastening performance. Specific embodiment 4:

[0037] This embodiment further illustrates the short bolts 3 based on the specific embodiment 1, and there are six short bolts 3. Specific embodiment 5:

[0039] This embodiment further illustrates the long bolts 5 based on the specific embodiment 1, and there are four long bolts 5.

[0040] It is firm and reliable, and can prevent the relative displacement between the pad and the hub when the crankshaft pulley is running, thereby preventing the bolt rotation and torque attenuation of the press-fitted pad.

[0041] 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 crankshaft pulley assembly structure, characterized in that: The invention comprises a wheel hub (1), a spun pulley (2) and a gasket (4); a wheel hub inner hole (8) is provided at the center of the wheel hub (1); a wheel hub keyway (7) is provided on one side of the wheel hub inner hole (8); a wheel hub stopper (13) is provided on the wheel hub mounting surface of the wheel hub (1); the spun pulley (2) and the gasket (4) are connected to the mounting surface of the wheel hub (1) via short bolts (3) and long bolts (5) respectively; the spun pulley (2) is surrounded outside the surrounding range of the wheel hub stopper (13); the gasket (4) is located within the surrounding range of the wheel hub stopper (13); a gasket stopper (11) is provided on the gasket mounting surface (12) of the gasket (4); and a gasket inner hole (9) is provided at the center of the gasket stopper (11).

2. The crankshaft pulley assembly structure according to claim 1, characterized in that: The diameter of the wheel hub inner hole (8) is greater than the diameter of the cushion block inner hole (9).

3. The crankshaft pulley assembly structure according to claim 1, characterized in that: The diameter of the inner hole (9) of the cushion block is larger than the diameter of the screw rod of the crankshaft pulley bolt (6).

4. The crankshaft pulley assembly structure according to claim 1, characterized in that: There are six short bolts (3).

5. The crankshaft pulley assembly structure according to claim 1, characterized in that: There are four long bolts (5).

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