Idle wheel with fully-sealed dustproof structure

Abstract

The utility model discloses a full-sealed idle wheel with a dustproof structure, which comprises a shaft bolt, a pedestal is sleeved outside the middle of the shaft bolt, the pedestal is a cylindrical barrel, a circle of boss is arranged in the middle of the pedestal, a rear dustproof cover is arranged on the boss, the pedestal is fixed with the shaft bolt through a clip, the rear dustproof cover is sleeved outside the pedestal, and a bearing is further sleeved outside the top of the pedestal. According to the idle wheel, full-sealing dust prevention of an idle wheel product is achieved, the space is large, universality is high, the installation requirements of accessories of different sizes and specifications can be met, the protection capacity is higher due to the arrangement of the multiple dust covers, the bearing can be well protected, and the sealing performance of the idle wheel is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of dustproof idler wheels, in particular to an idler wheel with a fully sealed dustproof structure. Background Technology

[0002] The idler gear is a gear that plays a transmission role between two transmission gears that do not touch each other. It meshes with these two gears at the same time. It is mainly used to change the rotation direction of the passive gear to make it the same as the driving gear. The idler gear is also called the bridge gear or intermediate gear. The number of its teeth has no effect on the value of the transmission ratio, but it will affect the direction of the final gear.

[0003] At present, the operating environment of commercial vehicles is indeed quite harsh. Not only do they need to travel on sandy roads, but they also often have to work in sewage and dusty environments. This harsh environment brings huge challenges to various components of commercial vehicles, especially idler wheels.

[0004] As an important component of the transmission system, the normal operation of the idler is crucial to the performance and life of the vehicle. However, in such a harsh environment, the idler is easily corroded by mud, sewage and dust, leading to early abnormal failure. This not only seriously affects the service life of the product, but also reduces its reliability, bringing potential risks to the operational safety of the vehicle.

[0005] Although there are some protective structures for commercial vehicle idlers on the market, their protective effects are not ideal. These protective structures are often unable to withstand the invasion of harsh environments and cannot effectively protect the idlers from damage. Therefore, the existing protective structures can no longer meet the application requirements of commercial vehicles under complex working conditions. Contents of utility model

[0006] In order to overcome the deficiencies of the prior art, the utility model solves the problem of insufficient sealing of the current vehicle idler wheel.

[0007] The fully sealed dustproof structure idler wheel includes an axle bolt, a cushion seat is sleeved on the outer side of the middle of the axle bolt, the cushion seat is a cylindrical barrel body, a circle of bosses is arranged in the middle, and a rear dust cover is arranged on the bosses.

[0008] Furthermore, the cushion seat is fixed to the shaft bolt by a clip.

[0009] Furthermore, a rear dust cover is sleeved on the outer side of the cushion seat, a bearing is sleeved on the outer side of the top of the cushion seat, and a pulley is sleeved on the outer side of the bearing.

[0010] Furthermore, an annular groove is formed at one end of the pulley close to the rear dust cover.

[0011] Furthermore, a VD-type rubber sealing ring is also installed on the rear dust cover. The VD-type rubber sealing ring contacts the end face of the pulley and forms a contact full seal. The rear dust cover and the annular groove of the pulley form a clearance labyrinth dust prevention structure.

[0012] Furthermore, a pressing plate is also provided at the bottom of the bearing. An inner dust cover is provided on the left side of the pressing plate, and a front dust cover is also provided on the top of the inner dust cover.

[0013] Furthermore, a retaining ring is provided inside the pulley.

[0014] Advantages of the present utility model: This application realizes the full-sealed dust prevention of the idler pulley product, has a large space and strong versatility, can meet the installation needs of accessories with different size specifications, and the multiple dust covers provide stronger protection ability, can well protect the bearing, and effectively improve the sealing performance of the idler pulley. Description of the Drawings

[0015] Figure 1 is a schematic diagram of the idler pulley structure with a full-sealed dust prevention structure;

[0016] Figure 2 is a schematic diagram of the front dust cover structure of the idler pulley with a full-sealed dust prevention structure;

[0017] In the figure: 1 - inner dust cover, 2 - pressing plate, 3 - rear dust cover, 4 - pad base, 5 - shaft bolt, 6 - clip, 7 - pulley, 8 - retaining ring, 9 - VD-type rubber sealing ring, 10 - bearing, 11 - front dust cover. Detailed Embodiment

[0018] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. Although the description of the present utility model will be introduced in conjunction with the preferred embodiments, this does not mean that the features of this utility model are limited to this implementation manner. On the contrary, the purpose of introducing the utility model in conjunction with the implementation manner is to cover other alternatives or modifications that may be extended based on the claims of the present utility model. In order to provide a deep understanding of the present utility model, many specific details will be included in the following description. The present utility model can also be implemented without these details. In addition, in order to avoid confusing or obscuring the key points of the present utility model, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0019] Unless otherwise defined, the technical terms or scientific terms used in this utility model shall have the ordinary meanings understood by those with ordinary skills in the field to which this utility model belongs. The "first", "second" and similar terms used in this utility model do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, similar terms such as "a" or "one" do not denote a quantity limitation, but mean that there is at least one. Terms such as "set", "connected", "connected to" and the like 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this embodiment can be understood according to specific situations. The orientation or positional relationship indicated by "up", "down", "left", "right", "inside", "bottom" and the like is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing this utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to this utility model.

[0020] To make the objectives, technical solutions and advantages of this utility model clearer, the embodiments of this utility model will be further described in detail below in conjunction with the accompanying drawings.

[0021] In this embodiment, as shown in the attached Figures 1 - 2 figures, the fully sealed dust-proof structure idler pulley includes a shaft bolt 5. A washer seat 4 is sleeved on the outer side of the middle part of the shaft bolt 5. The washer seat 4 is a cylindrical barrel body, with a ring of bosses arranged in the middle, and a rear dust cover 3 is arranged on the bosses.

[0022] Furthermore, the washer seat 4 is fixed to the shaft bolt 5 through a clip 6.

[0023] Furthermore, a rear dust cover 3 is sleeved on the outer side of the washer seat 4, a bearing 10 is also sleeved on the outer side of the top of the washer seat 4, and a pulley 7 is sleeved on the outer side of the bearing 10.

[0024] Furthermore, an annular groove is opened at one end of the pulley 7 close to the rear dust cover 3.

[0025] Furthermore, a VD-type rubber sealing ring 9 is also installed on the rear dust cover 3, and the VD-type rubber sealing ring 9 is in contact with the end face of the pulley 7 to form a contact-type full seal, and the rear dust cover 3 and the annular groove of the pulley 7 form a clearance-type labyrinth dust-proof structure.

[0026] Furthermore, a pressing plate 2 is also arranged at the bottom of the bearing 10, an inner dust cover 1 is arranged on the left side of the pressing plate 2, and a front dust cover 11 is arranged on the top of the inner dust cover 1.

[0027] Further, a retaining ring 8 is provided inside the pulley 7.

[0028] The specific working mode of this application is as follows:

[0029] After the idle pulley is installed, a clearance-type labyrinth dust-proof structure is formed between the rear end and the annular groove of the pulley 7 through the rear dust cover 3, forming the first protection structure. At the same time, a VD-type rubber sealing ring 9 is installed on the rear dust cover 3 to make it contact the end face of the pulley 7. During rotation, the VD-type rubber sealing ring 9 always contacts the end face of the pulley 7, realizing the second protection structure - contact-type full sealing.

[0030] The front end contacts the groove of the pulley 7 through the front dust cover 11 and always maintains static contact during rotation, realizing full-sealing dust-proof and forming the first protection structure; at the same time, a clearance is formed between the inner dust cover 1 and the pulley 7, realizing the second protection structure - clearance-type sealing.

[0031] Thus, the idle pulley achieves a double dust-proof structure at the front end and the rear end, avoiding the intrusion of external pollutants (mud, dust) at both ends.

[0032] The beneficial effects of the present utility model: This application realizes the full-sealing dust-proof of the idle pulley product, has a large space and strong versatility, can meet the installation needs of accessories with different size specifications, and the setting of multiple dust covers makes the protection ability stronger, can well protect the bearing, and effectively improves the sealing performance of the idle pulley.

[0033] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. Fully sealed dustproof structure idler, characterized by: It comprises an axle bolt (5), a cushion seat (4) is sleeved on the outer side of the middle part of the axle bolt (5), the cushion seat (4) is a cylindrical barrel body, a circle of bosses is arranged in the middle part, and a rear dust cover (3) is arranged on the bosses; The outer side of the cushion seat (4) is covered with a rear dust cover (3), the outer side of the top of the cushion seat (4) is also covered with a bearing (10), and the outer side of the bearing (10) is covered with a pulley (7); An annular groove is formed at one end of the pulley (7) close to the rear dust cover (3); A VD-type rubber sealing ring (9) is also installed on the rear dust cover (3), and the VD-type rubber sealing ring (9) contacts the end surface of the pulley (7) to form a contact-type full seal, and the rear dust cover (3) and the annular groove of the pulley (7) form a gap-type labyrinth dustproof; A pressure plate (2) is also provided at the bottom of the bearing (10), an inner dust cover (1) is provided on the left side of the pressure plate (2), and a front dust cover (11) is also provided on the top of the inner dust cover (1).

2. The fully sealed dustproof structure idler wheel according to claim 1, characterized in that: The cushion seat (4) is fixed to the shaft bolt (5) via a clamp (6).

3. The fully sealed dustproof structure idler wheel according to claim 1, characterized in that: A retaining ring (8) is arranged inside the pulley (7).

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