A fan bracket assembly and an engine

Abstract

The utility model relates to a fan bracket assembly and engine belong to mechanical technical field, including fan bracket, linkage bearing, fan pulley and expansion sleeve, linkage bearing includes mandrel, fan bracket is equipped with linkage bearing mounting hole, and linkage bearing is installed in linkage bearing mounting hole, fan pulley is equipped with expansion sleeve mounting hole and mandrel mounting hole, and expansion sleeve mounting hole and mandrel mounting hole are along the axial direction distribution of fan pulley, and mandrel is worn in mandrel mounting hole, and mandrel still includes the fixed end of the exposure in mandrel mounting hole, and expansion sleeve sets up between expansion sleeve mounting hole and fixed end, and the inner hole of expansion sleeve passes through fixed end, when expansion sleeve is in the expansion tight state, mandrel, expansion sleeve and fan pulley interference fit. By adopting expansion sleeve to replace traditional interference press -fit process, the assembly flow of fan bracket assembly is simplified, and the assembly difficulty and maintenance cost of fan bracket assembly are reduced.

Description

Technical Field

[0001] This application relates to the field of fan bracket assembly technology, and in particular to a fan bracket assembly and engine. Background Technology

[0002] In the engine front-end accessory drive system, the fan bracket assembly is a key component, mainly used to support and drive the cooling fan, and can also drive other accessories such as water pumps and air compressors. Traditional fan bracket assemblies typically include a fan bracket, a linkage bearing, and a fan pulley. The spindle of the linkage bearing and the fan pulley are generally connected by an interference fit, which requires heat fitting or high-tonnage press during assembly.

[0003] However, due to the extremely high requirements for assembly processes associated with interference fits, the pressing forces required for different bearing specifications vary significantly. Improper operation can easily lead to uneven pressing, deformation, or even damage to parts. More importantly, the fan bracket assembly often malfunctions due to wear, abnormal noise, or failure of the linkage bearings caused by long-term operation. Because the fan pulley and bearing spindle form a strong interference fit, the bearing cannot be disassembled and replaced individually. Often, the entire fan bracket assembly needs to be scrapped and replaced as a whole, resulting in high maintenance costs and significant resource waste. Furthermore, once the fan bracket assembly is assembled, the fan pulley is fixed, making it difficult to flexibly adjust the transmission ratio according to different engine operating conditions (such as high altitude, heavy load, idling speed, etc.). If a change in the transmission ratio is required, the entire assembly usually needs to be replaced, lacking modularity and adaptability.

[0004] Therefore, a new type of fan bracket assembly structure is urgently needed to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this application is to overcome the shortcomings of the prior art and provide a fan bracket assembly and engine that can simplify the assembly process of the fan bracket assembly, reduce the assembly difficulty, and enable the rapid disassembly and replacement of faulty bearings.

[0006] To achieve the above objectives, in a first aspect, this utility model provides a fan bracket assembly, which adopts the following technical solution: A fan bracket assembly includes a fan bracket, a linkage bearing, a fan pulley, and an expansion sleeve. The linkage bearing includes a spindle. The fan bracket has a linkage bearing mounting hole, and the linkage bearing is installed in the linkage bearing mounting hole. The fan pulley has an expansion sleeve mounting hole and a spindle mounting hole. The expansion sleeve mounting hole and the spindle mounting hole are distributed along the axial direction of the fan pulley. The spindle passes through the spindle mounting hole and also includes a fixed end exposed in the spindle mounting hole. The expansion sleeve is disposed between the expansion sleeve mounting hole and the fixed end, and the inner hole of the expansion sleeve passes through the fixed end. When the expansion sleeve is in a tightened state, the spindle, the expansion sleeve, and the fan pulley are interference-fitted.

[0007] Furthermore, a recess is formed on the fan pulley, and the mandrel mounting hole is formed on the recess; the mandrel is provided with a shoulder, the diameter of which is larger than the diameter of the mandrel mounting hole, one side of the recess abuts against the expansion sleeve, and the other side of the recess abuts against the shoulder.

[0008] Furthermore, the inner sidewall of the fan bracket near the recessed platform is provided with a limiting groove, the linkage bearing includes a bearing outer ring, an elastic retaining ring is installed in the limiting groove, one side of the elastic retaining ring abuts against the bearing outer ring, and the other side abuts against the sidewall of the recessed platform.

[0009] Furthermore, the fan bracket is also provided with a bearing removal hole, through which the fan bracket and the linkage bearing can be disassembled.

[0010] Furthermore, the outer ring of the fan pulley is provided with multiple wedge grooves.

[0011] Furthermore, the mounting hole of the linkage bearing and the outer ring of the linkage bearing adopt a transition fit.

[0012] Furthermore, the linkage bearing is a triple-combination bearing.

[0013] Furthermore, the mandrel and the mandrel mounting hole are fitted with a clearance fit.

[0014] Furthermore, the expansion sleeve includes a bolt and threaded holes distributed circumferentially along the body of the expansion sleeve. When the expansion sleeve is in a tightened state, the bolt is fixedly installed in the threaded holes.

[0015] Secondly, this utility model provides an engine, which adopts the following technical solution: An engine comprising any of the aforementioned fan bracket assemblies.

[0016] Beneficial effects: The fan bracket assembly of this application uses an expansion sleeve instead of the traditional interference fit process. The expansion sleeve assembly process is simple, simplifying the assembly process of the fan bracket assembly and reducing assembly difficulty. Furthermore, the expansion sleeve enables quick disassembly and replacement of faulty bearings, supports the reuse of other parts, and significantly reduces the maintenance cost of the fan bracket assembly. The expansion sleeve also enables the transmission between the linkage bearing and the fan pulley, improving the reliability and economy of the fan bracket assembly. In addition, the expansion sleeve is easy to disassemble, allowing operators to easily match different fan pulleys according to different speed ratio requirements, meeting the needs of different operating conditions. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 This is a structural sectional view of the fan bracket assembly of this application; Figure 2 This is an exploded sectional view of the fan bracket assembly of this application.

[0019] In the diagram, 100 is the fan bracket; 110 is the linkage bearing mounting hole; 200 is the linkage bearing; 210 is the spindle; 221 is the fixed end; 220 is the bearing outer ring; 300 is the fan pulley; 310 is the expansion sleeve mounting hole; 320 is the spindle mounting hole; 330 is the countersunk platform; 400 is the expansion sleeve; 410 is the expansion sleeve body; 500 is the shaft shoulder; 600 is the limiting groove; 700 is the multi-wedge groove; and 800 is the elastic retaining ring. Detailed Implementation

[0020] The following is in conjunction with the appendix Figure 1 - Appendix Figure 2 The technical solutions in the embodiments of this application are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0021] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0022] Furthermore, the use of terms such as "first," "second," etc., in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0023] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0024] Furthermore, the technical solutions of the various embodiments of this application can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this application.

[0025] This application discloses a fan bracket assembly, including a fan bracket 100, a linkage bearing 200, a fan pulley 300, and an expansion sleeve 400. The linkage bearing 200 includes a spindle 210, and the fan bracket 100 has a linkage bearing mounting hole 110, in which the linkage bearing 200 is installed. The fan pulley 300 has an expansion sleeve mounting hole 310 and a spindle mounting hole 320, with the expansion sleeve mounting hole 310 and the spindle mounting hole 320 aligned along the […]. The fan pulley 300 is distributed along its axial direction. The spindle 210 passes through the spindle mounting hole 320. The spindle 210 also includes a fixed end 221 exposed outside the spindle mounting hole 320. The expansion sleeve 400 is disposed between the expansion sleeve mounting hole 310 and the fixed end 221. The inner hole of the expansion sleeve 400 passes through the fixed end 221. When the expansion sleeve 400 is in a tightened state, the spindle 210, the expansion sleeve 400 and the fan pulley 300 are interference-fitted.

[0026] like Figure 1 , Figure 2As shown, the fan bracket assembly provided in this application aims to solve the problems of complex assembly processes, difficult maintenance, and high costs caused by the use of heat-fitting or press-fitting interference fits between the linkage bearing 200 and the fan pulley 300 in the prior art. The fan bracket assembly provided in this application, by introducing an expansion sleeve 400 structure, achieves a novel fan bracket assembly with key components that are heat-free, easy to disassemble, and reusable, thereby improving the ease of installation of the fan bracket assembly.

[0027] Specifically, the fan bracket 100 serves as the main support and is provided with a linkage bearing mounting hole 110 for mounting the linkage bearing 200. The outer ring 220 of the bearing and the linkage bearing mounting hole 110 are connected by an transition fit to ensure that the outer ring 220 of the bearing is stably positioned.

[0028] The fan pulley 300 is provided with an expansion sleeve mounting hole 310 and a spindle mounting hole 320; the linkage bearing 200 includes a spindle 210, which is installed in the linkage bearing mounting hole 110 of the fan bracket 100, and the spindle 210 has a portion of the spindle 210 that passes through the spindle mounting hole 320 and is exposed outside the spindle mounting hole 320 as a fixed end 221, that is, the fixed end 221 is the end of the spindle 210 away from the outer ring 220 of the bearing, and the fixed end 221 is used to cooperate with the expansion sleeve 400.

[0029] The expansion sleeve 400 is disposed between the expansion sleeve mounting hole 310 and the fixed end 221 of the spindle 210. The inner hole of the expansion sleeve 400 passes through the fixed end 221 of the spindle 210. When the expansion sleeve 400 is in a tightened state, the spindle 210, the expansion sleeve 400 and the fan pulley 300 are interference-fitted to realize the power transmission of the fan bracket assembly.

[0030] In this embodiment, the assembly process of the fan bracket assembly is as follows: The linkage bearing 200 is installed into the linkage bearing mounting hole 110 of the fan bracket 100 using an interference fit. Next, the spindle 210 of the linkage bearing 200 is inserted into the spindle mounting hole 320 of the fan pulley 300. Then, the expansion sleeve 400 is placed between the expansion sleeve mounting hole 310 of the fan pulley 300 and the exposed fixed end 221 of the spindle 210. The bolts on the expansion sleeve 400 are tightened to make the expansion sleeve 400 expand and achieve an interference fit between the spindle 210, the expansion sleeve 400 and the fan pulley 300.

[0031] If it is necessary to replace or disassemble the fan pulley 300 or the linkage bearing 200, first loosen the bolts on the expansion sleeve 400 to loosen the expansion sleeve 400. Then, use a special tool to separate the linkage bearing 200 from the fan bracket 100 and the fan pulley 300. This disassembly process allows for the replacement of the faulty linkage bearing 200 alone, without the need to replace the entire fan bracket assembly.

[0032] The technical solution in this embodiment replaces the traditional interference fit process with an expansion sleeve 400. The expansion sleeve 400 has a simple assembly process, requires no heat fitting, simplifies the assembly process of the fan bracket assembly, and reduces assembly difficulty and cost. Furthermore, the expansion sleeve 400 enables quick disassembly and replacement of faulty bearings, achieving pressure-free assembly and convenient maintenance of the fan bracket assembly. It also supports the reuse of other parts, significantly reducing the maintenance cost of the fan bracket assembly and improving the reliability and economy of the equipment. In addition, the expansion sleeve 400 is easy to disassemble, allowing operators to easily match different fan pulleys 300 according to different speed ratio requirements, meeting the needs of different operating conditions.

[0033] In one embodiment of this application, a recessed platform 330 is formed on the fan pulley 300, and a spindle mounting hole 320 is formed on the recessed platform 330; the spindle 210 is provided with a shoulder 500, the diameter of the shoulder 500 is larger than the diameter of the spindle mounting hole 320, one side of the recessed platform 330 abuts against the expansion sleeve 400, and the other side of the recessed platform abuts against the shoulder 500.

[0034] To address potential issues such as inaccurate axial positioning, loosening, or misalignment of the fan pulley 300 during assembly and operation, a countersunk platform 330 is provided on the fan pulley 300, with a spindle mounting hole 320 formed on the countersunk platform 330. The spindle 210 is provided with a shoulder 500, the diameter of which is larger than the diameter of the spindle mounting hole 320 of the fan pulley 300, forming a reliable mechanical stop structure. This achieves precise axial positioning of the fan pulley 300 and provides a stable support reference, ensuring concentricity and smooth operation during power transmission.

[0035] Specifically, in one embodiment, such as Figure 2 As shown, the spindle 210 and the shoulder 500 are stepped. When the spindle 210 is inserted into the spindle mounting hole 320, the shoulder 500 cannot pass through the spindle mounting hole 320 and thus the shoulder 500 abuts against the end face of the fan pulley 300, so that the fan pulley 300 is blocked by the shoulder 500 and cannot move further towards the linkage bearing 200, forming an insurmountable axial limiting surface. At this time, the pulley has obtained a clear positioning reference in the axial direction.

[0036] Therefore, this design not only solves the positioning ambiguity problem that may exist in the pressure-free installation structure, but also significantly improves the installation accuracy and operational stability of the fan pulley 300.

[0037] In one embodiment of this application, the inner sidewall of the fan bracket 100 near the end of the recessed platform 330 is further provided with a limiting groove 600, the linkage bearing 200 includes a bearing outer ring 220, and an elastic retaining ring 800 is installed in the limiting groove 600. One side of the elastic retaining ring 800 abuts against the bearing outer ring 220, and the other side abuts against the sidewall of the recessed platform 330.

[0038] To address the potential axial movement of the linkage bearing 200 during operation and ensure the structural stability and operational reliability of the fan bracket assembly under high engine speed and strong vibration conditions, a limiting groove 600 is provided on the inner sidewall of the fan bracket 100 near the fan pulley 300, and an elastic retaining ring 800 is installed in the limiting groove 600. The elastic retaining ring 800 reliably limits the axial movement of the linkage bearing 200, preventing axial displacement due to force or vibration, thereby ensuring the normal operation of the entire transmission system.

[0039] Specifically, the limiting groove 600 is formed on the inner side wall of one end of the recessed platform 330. It is an annular groove structure and its position corresponds to the end face of the bearing outer ring 220. The elastic retaining ring 800 is installed in the limiting groove 600. Its outer diameter matches the limiting groove 600, and its inner diameter is slightly smaller than the diameter of the bearing outer ring 220, so as to play an axial stopping role.

[0040] During the assembly process, the linkage bearing 200 is first installed into the linkage bearing mounting hole 110 of the fan bracket 100. The elastic retaining ring 800 is compressed and embedded into the limiting groove 600. The elastic retaining ring 800 is clamped in the limiting groove 600 by its own elasticity, and its inner edge is tightly attached to the end face of the outer ring 220 of the linkage bearing. Since the spindle 210 is fixedly engaged with the outer ring 220 of the bearing, it forms an axial constraint on the entire linkage bearing 200.

[0041] As a core transmission support component, the linkage bearing 200, if it moves axially, will cause the spindle 210 to deflect, the pulley to jump, the multi-ribbed belt to slip or even break. By setting a limiting groove 600 on the inner wall of the fan bracket 100 and installing an elastic retaining ring 800, the axial displacement of the linkage bearing 200 under high load or vibration environment can be effectively prevented, ensuring transmission accuracy and stability; avoiding abnormal wear, increased noise or premature failure caused by bearing movement, enhancing structural reliability and extending the service life of the assembly.

[0042] In one embodiment of this application, the fan bracket 100 is further provided with a bearing removal hole, through which the fan bracket 100 and the linkage bearing 200 can be disassembled.

[0043] Furthermore, to address the issues of difficulty in disassembling and high maintenance costs associated with existing fan bracket assemblies when the linkage bearing 200 fails, a bearing removal hole is specifically provided on the fan bracket 100. Specifically, this hole is located on the fan bracket 100 body, corresponding to the mounting area of ​​the linkage bearing 200. This bearing removal hole provides an effective channel for applying disassembly force during maintenance, thereby enabling rapid and non-destructive separation between the linkage bearing 200 and the fan bracket 100, significantly improving maintenance efficiency and reducing maintenance costs.

[0044] In one embodiment of this application, the outer ring of the fan pulley 300 is provided with a multi-wedge groove 700.

[0045] Furthermore, to achieve efficient, smooth, and reliable power transmission in the engine front-end accessory drive system, multiple V-shaped or trapezoidal cross-section grooves are continuously cut along the outer circumference of the fan pulley 300mm. This allows the pulley to engage with the multi-wedge belt output from the engine crankshaft or other drive sources, thereby driving the fan to rotate or powering other auxiliary equipment (such as water pumps, air conditioning compressors, etc.). This design improves transmission efficiency and reduces the risk of slippage.

[0046] In one embodiment of this application, the linkage bearing mounting hole 110 and the outer ring of the linkage bearing 200 are fitted with a transition fit.

[0047] Furthermore, by designing the linkage bearing mounting hole 110 on the fan bracket 100 and the outer ring of the linkage bearing 200 as a transition fit, the difficulties of pressing and the risk of disassembly damage caused by the traditional interference fit are avoided, and the problem of rotation or loosening of the bearing outer ring 220 that may be caused by the clearance fit is prevented, thus achieving a balance between structural stability and ease of maintenance.

[0048] In one embodiment of this application, the mandrel 210 and the mandrel mounting hole 320 are fitted with a clearance fit.

[0049] In order to enable the fan pulley 300 to be smoothly and stress-free inserted into the spindle 210 of the linkage bearing 200, the spindle 210 and the spindle mounting hole 320 on the fan pulley 300 are designed to be clearance fit. This avoids problems such as assembly difficulties, stress concentration or misalignment caused by interference or overfit between the fan pulley 300 and the spindle 210. At the same time, it provides the necessary assembly freedom for the subsequent tightening operation of the expansion sleeve 400.

[0050] Specifically, since the mandrel 210 and the mandrel mounting hole 320 adopt a clearance fit, the pulley can easily slide to the shoulder 500 position. This process does not require hammering or applying external force. At this time, there is a uniform small gap between the mandrel 210 and the inner hole of the pulley, which provides space for the axial insertion and radial expansion of the expansion sleeve 400. This avoids problems such as pulley deformation, mandrel 210 bending, or abnormal preload of the expansion sleeve 400 caused by the need for strong pressing during the assembly of the fan pulley 300, thus improving the convenience of assembly.

[0051] In one embodiment of this application, the expansion sleeve 400 includes a bolt and threaded holes distributed circumferentially along the expansion sleeve body 410. When the expansion sleeve 400 is in a tightened state, the bolt is fixedly installed in the threaded holes.

[0052] Furthermore, by setting circumferentially distributed threaded holes on the expansion sleeve body 410 and cooperating with bolts to achieve radial expansion of the expansion sleeve 400, a firm interference fit is established between the spindle 210 and the fan pulley 300 to complete torque transmission. The expansion sleeve 400 structure can replace the traditional hot fitting or press fitting process, which improves the assembly efficiency and maintenance convenience of the fan bracket assembly while ensuring transmission reliability.

[0053] In one embodiment of this application, the linkage bearing 200 is a triple-bearing assembly.

[0054] The triple-bearing assembly consists of three rolling bearings pre-installed in the same outer ring or cage in a specific arrangement to form a standardized, modular integrated bearing unit. By designing the linkage bearing 200 as a triple-bearing assembly, the linkage bearing 200 can simultaneously withstand large radial loads, bidirectional axial loads, and overturning moments, thereby meeting the comprehensive requirements of the engine front-end accessory drive system for high reliability, long service life, and high rigidity.

[0055] This invention also discloses an engine that includes the fan bracket assembly described above.

[0056] The above description is merely a preferred embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the inventive concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A fan bracket assembly, characterized in that, include: Fan bracket (100), linkage bearing (200), fan pulley (300) and expansion sleeve (400); The linkage bearing (200) includes a spindle (210), and the fan bracket (100) is provided with a linkage bearing mounting hole (110). The linkage bearing (200) is installed in the linkage bearing mounting hole (110). The fan pulley (300) is provided with an expansion sleeve mounting hole (310) and a spindle mounting hole (320). The expansion sleeve mounting hole (310) and the spindle mounting hole (320) are distributed along the axial direction of the fan pulley (300). The spindle (210) passes through the spindle mounting hole (320). The spindle (210) also includes a fixed end (221) exposed in the spindle mounting hole (320). The expansion sleeve (400) is installed between the expansion sleeve mounting hole (310) and the fixed end (221). The inner hole of the expansion sleeve (400) passes through the fixed end (221). When the expansion sleeve (400) is in a tightened state, the spindle (210), the expansion sleeve (400) and the fan pulley (300) are interference-fitted.

2. The fan bracket assembly according to claim 1, characterized in that, A recessed platform (330) is formed on the fan pulley (300), and a spindle mounting hole (320) is formed on the recessed platform (330); The mandrel (210) is provided with a shoulder (500), the diameter of which is larger than the diameter of the mandrel mounting hole (320). One side of the countersunk plate (330) abuts against the expansion sleeve (400), and the other side of the countersunk plate abuts against the shoulder (500).

3. The fan bracket assembly according to claim 2, characterized in that, The fan bracket (100) is provided with a limiting groove (600) on the inner side wall near the sink (330). The linkage bearing (200) includes a bearing outer ring (220) and an elastic retaining ring (800) installed in the limiting groove (600). One side of the elastic retaining ring (800) abuts against the bearing outer ring (220) and the other side abuts against the side wall of the sink (330).

4. The fan bracket assembly according to claim 1, characterized in that, The fan bracket (100) is also provided with a bearing removal hole, through which the fan bracket (100) and the linkage bearing (200) can be removed.

5. The fan bracket assembly according to claim 1, characterized in that, The outer ring of the fan pulley (300) is provided with a multi-wedge groove (700).

6. The fan bracket assembly according to claim 3, characterized in that, The mounting hole (110) of the linkage bearing and the outer ring (220) of the bearing adopt a transition fit.

7. The fan bracket assembly according to claim 1, characterized in that, The mandrel (210) and the mandrel mounting hole (320) are fitted with a clearance fit.

8. The fan bracket assembly according to claim 1, characterized in that, The expansion sleeve (400) includes a bolt and threaded holes distributed circumferentially along the body (410) of the expansion sleeve. When the expansion sleeve (400) is in a tightened state, the bolt is fixedly installed in the threaded holes.

9. The fan bracket assembly according to claim 1, characterized in that, The linkage bearing (200) is a triple-combination bearing.

10. An engine, characterized in that, Includes the fan bracket assembly as described in any one of claims 1-9 above.

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