A bearing pedestal positioning assembly for a shredder

Abstract

The utility model discloses a bearing seat positioning assembly for the roll crusher, relates to the roll crusher field, aims at solving the existing roll crusher fixed mode, and the inside installation operation difficult, nut easy vibration loosening and bolt easy shearing fracture problem, including frame and bearing seat, the frame and bearing seat on be equipped with multiple groups of mutually matched assembly hole, multiple group assembly hole equiangular arrangement in the four around bearing seat, the assembly hole is passed in and is equipped with the positioning screw bushing, the positioning screw bushing is passed in and is equipped with the bolt, the bolt is threadedly connected with the lock washer, and the advantage lies in: through positioning screw bushing and lock washer, greatly improve the equipment stability and the convenience of operation.

Description

Technical Field

[0001] This utility model relates to the field of jaw crusher technology, and in particular to a bearing seat positioning assembly for a jaw crusher. Background Technology

[0002] In the assembly and maintenance of jaw crushers, the bearing housing, as a core load-bearing and positioning component, directly affects the equipment's operational stability, crushing efficiency, and service life through its stable and precise installation. Currently, the fixing of key components such as bearing housings on jaw crushers generally adopts the traditional bolt-nut fastening method. Specifically, a through hole is usually set at the connection between the bearing housing and the frame, a high-strength bolt is inserted, and then a nut is tightened on the other end of the bolt to achieve a lock. This method seems simple and straightforward in structure, but it has revealed the following significant drawbacks in actual installation operations and long-term equipment operation: First, installation is extremely inconvenient, especially in enclosed or confined spaces. Jaw crushers have a compact structure, and many installation positions, particularly those inside the machine body, are extremely cramped. When installing bearing housings, one operator typically needs to support and align the bolts from the outside of the frame, while another operator must laboriously enter or lean into the machine body to level and tighten the nuts using wrenches and other tools, under conditions of poor visibility and limited movement. This process is not only time-consuming and labor-intensive, requiring a high level of skill and physical strength from the operators, but also poses certain safety risks. The stability of installation quality largely depends on the experience and responsibility of the workers, making standardized and efficient assembly difficult to achieve.

[0003] Secondly, traditional single-nut locking methods lack sufficient anti-loosening capability and are prone to loosening or even falling off due to vibration. During operation, the moving jaw plate of a jaw crusher periodically squeezes and crushes the material, generating continuous and intense impacts and vibrations. This working condition poses a severe challenge to the anti-loosening performance of threaded connections. Even if a single nut reaches the specified pre-tightening torque during installation, it is highly susceptible to self-rotation and loosening under long-term, intense vibration. Once the nut loosens, it not only compromises the initial positioning accuracy of the bearing housing, leading to increased equipment noise and accelerated abnormal wear of components, but in more serious cases, the nut may completely fall off. If a fallen nut falls into the crushing chamber, it could potentially cause equipment jamming or even serious damage to core crusher components (such as the moving jaw and eccentric shaft), resulting in a major equipment accident and posing a significant safety hazard.

[0004] Furthermore, bolts primarily bear shear forces, making them prone to fatigue fracture. In traditional connection methods, bolts rely mainly on the compression between their shank and the hole wall of the connector to withstand the enormous shear force (mainly from crushing force) transmitted from the bearing housing, perpendicular to the bolt axis. As a standard component, the bolt's shear resistance is relatively weak compared to its tensile strength. Under the high-intensity, high-frequency cyclic load impact of a jaw crusher, the bolt shank, especially at the thread termination or stress concentration points, is prone to fracture due to shear fatigue. Once a bolt fractures, its positioning function is immediately lost, with potentially disastrous consequences. Frequent replacement of broken bolts also increases maintenance costs and downtime. Utility Model Content

[0005] In view of the above situation and to overcome the defects of the prior art, this utility model provides a bearing seat positioning assembly for a jaw crusher. This design effectively solves the problems of difficult internal installation and operation, easy vibration and loosening of nuts, and easy shearing and breakage of bolts in the existing jaw crusher fixing method.

[0006] To achieve the above objectives, the present invention provides the following technical solution: The present invention includes a frame and a bearing housing. The frame and the bearing housing are provided with multiple sets of mutually cooperating assembly holes. The multiple sets of assembly holes are arranged at equal angles around the bearing housing. A positioning screw sleeve passes through the assembly hole, and a bolt passes through the positioning screw sleeve. An anti-loosening fixing device is threaded onto the bolt.

[0007] Preferably, the anti-loosening fastener includes a fixing plate, the fixing plate having multiple sets of threaded holes, the threaded holes being threadedly connected to the bolt.

[0008] Preferably, the fixing plate has a fan-shaped structure, a rubber gasket is fixedly connected to the inner side of the fixing plate, and the position of the threaded hole corresponds to the assembly hole.

[0009] Preferably, the positioning screw sleeve is made of alloy steel and has mounting holes for bolts to pass through.

[0010] Preferably, a limiting baffle is fixedly connected to the end of the positioning screw sleeve, and the size of the limiting baffle is larger than the size of the assembly hole.

[0011] Preferably, the length of the positioning screw sleeve is less than the sum of the lengths of the two assembly holes.

[0012] Compared with the prior art, the outstanding advantages of this utility model are: This application improves the shear resistance of bolts by adding a positioning sleeve between the bolt and the assembly hole, fundamentally solving the problem of bolts being prone to shearing and breakage, and ensuring the reliability, safety and service life of the bolts and equipment. At the same time, the anti-loosening fastener allows all tightening operations to be completed on the outside of the frame or in a relatively spacious area, eliminating the need for workers to enter the machine body to handle nuts, greatly improving the safety, convenience, standardization and efficiency of installation and maintenance. Attached Figure Description

[0013] Figure 1 This is a front structural diagram of the present utility model.

[0014] Figure 2 This is a schematic diagram of the fixing plate connection structure of this utility model.

[0015] Figure 3 This is a schematic diagram of the axial structure of the positioning screw sleeve of this utility model.

[0016] Figure 4 This is a schematic diagram of the forward structure of the bolt of this utility model.

[0017] Figure 5 This utility model Figure 4 Schematic diagram of the AA structure.

[0018] The following are the labels in the diagram: 1. Frame; 2. Bearing seat; 3. Assembly hole; 4. Positioning screw sleeve; 5. Bolt; 6. Anti-loosening retainer; 601. Fixing plate; 602. Threaded hole; 7. Mounting hole; 8. Limiting baffle. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see the appendix Figure 1-5 This embodiment provides a bearing housing positioning assembly for a jaw crusher: it includes a frame 1 and a bearing housing 2. The frame 1 and the bearing housing 2 are provided with multiple sets of mutually cooperating assembly holes 3. The multiple sets of assembly holes 3 are arranged at equal angles around the bearing housing 2. A positioning screw sleeve 4 passes through the assembly hole 3. A bolt 5 passes through the positioning screw sleeve 4. An anti-loosening retainer 6 is threaded onto the bolt 5.

[0021] On the corresponding connection surfaces of the frame 1 and the bearing housing 2, multiple sets of coaxially aligned assembly holes 3 are pre-machined. The multiple sets of assembly holes 3 are evenly arranged at equal angles around the axis of the bearing housing 2. For example, four sets or six sets can be distributed at 10-degree intervals to ensure the circumferential uniformity of connection rigidity and force.

[0022] The core improvement lies in the pre-embedding of a positioning screw sleeve 4 in each set of aligned assembly holes 3. The positioning screw sleeve 4 is preferably made of high-strength alloy steel (such as 42CrMo) to provide excellent compressive and shear resistance. The center of the positioning screw sleeve 4 is machined with a precision mounting hole 7, which serves as a guide channel for the bolt 5 to pass through. Its inner diameter forms a precision fit with the smooth section of the bolt 5 shank (e.g., a clearance fit of H7 / g6), rather than the loose fit between the traditional bolt 5 and the hole in the frame 1.

[0023] The length of the locating sleeve 4 is designed to be less than the sum of the depths of the two mating mounting holes 3 on the frame 1 and the bearing housing 2. A more preferred solution is, as... Figure 3 As shown, the length of the positioning screw sleeve 4 is configured to be fully accommodated in the total cavity formed by the assembly hole 3 after mating, and neither of its end faces protrudes from the outer surface of the frame 1 and the bearing seat 2, thereby achieving embedded installation, avoiding interference with surrounding components, and making the structure more regular in appearance.

[0024] During tightening, the high-strength bolt 5 is passed sequentially through the mounting hole 3 of the frame 1, the mounting hole 7 of the positioning sleeve 4, and the mounting hole 3 of the bearing housing 2 from the outside of the frame 1 (usually the side with more spacious operating space). Then, a locking device 6 is threaded onto the end of the bolt 5 located on the outside of the bearing housing 2 (which may be in a narrow internal space).

[0025] The anti-loosening fastener 6 includes a fan-shaped annular fixing plate 601, the curvature of which matches the local outer circumferential surface of the bearing housing 2. The fixing plate 601 has multiple threaded holes 602 machined on it, the number and position of which correspond to a group (usually two or three adjacent) of mounting holes 3 around its perimeter. During operation, the ends of the bolts 5 are screwed into these threaded holes 602. By sequentially tightening multiple bolts 5 connected to the same fixing plate 601, the fixing plate 601 acts as a "common nut plate." Compared to independently tightening multiple single nuts, this method significantly simplifies operation in confined spaces—the worker only needs to tighten the bolts 5 externally, while the internal fixing plate 601 naturally fits and shares the force through multiple threaded points. More importantly, the simultaneous locking of multiple bolts 5 by a single fixing plate 601 creates an interlocking effect, greatly suppressing the tendency of a single bolt 5's threaded pair to spontaneously rotate and loosen due to vibration. The anti-loosening performance is far superior to that of a single nut.

[0026] To further improve the anti-loosening effect and fit, a rubber gasket can be bonded and fixed on the inner side of the fixing plate 601 (i.e., the side facing the bearing seat 2). Under the pre-tightening force of the bolt 5, the rubber gasket undergoes compression deformation, which not only increases the friction of the mating surface, but also absorbs some high-frequency micro-vibrations, further attenuating the transmission of vibration energy to the threaded pair.

[0027] like Figure 3 and Figure 5 As shown, one end of the positioning screw sleeve 4 (usually set to face the outside of the frame 1) is integrated with a forged or welded annular limiting baffle 8. The outer diameter of the limiting baffle 8 is designed to be larger than the diameter of the mounting hole 3 in which it is located.

[0028] During installation, first insert the end of the positioning sleeve 4 with the limiting baffle 8 into the mounting hole 3 from the outside of the frame 1. Since the limiting baffle 8 is larger than the hole opening, it is reliably restrained on the outer surface of the frame 1, preventing the positioning sleeve 4 from falling off or moving inwards during subsequent operation or equipment vibration. This structure is particularly suitable for scenarios where the length of the positioning sleeve 4 is less than the depth of the mounting hole 3 on one side, requiring installation and fixation from one side. It simplifies the installation process, eliminates the need for additional retaining rings or pressure plates, and ensures the absolute stability of the positioning sleeve 4 in the working state, thereby guaranteeing the durability of the bolt 5's guiding accuracy.

[0029] The overall workflow of this application is as follows: During installation, firstly, the positioning sleeve 4 is inserted into the assembly hole 3 of the frame 1 (if a model with a limit baffle 8 is used, the limit baffle 8 is tightly attached to the outer surface of the frame 1); then, the bearing seat 2 is hoisted into place, aligning its assembly hole 3 with the assembly hole 3 of the frame 1 and the internal positioning sleeve 4. All bolts 5 are then inserted sequentially from the outside of the frame 1. Finally, on the outside of the bearing seat 2, the fan-shaped anti-loosening retainer 6 is aligned with the corresponding group of bolts 5, and the ends of each bolt 5 are screwed into the threaded holes 602 of the fixing plate 601, and tightened crosswise using a torque wrench to the specified torque. At this time, the enormous crushing force is mainly transmitted to the positioning sleeve 4 through the bearing seat 2, and then transmitted to the frame 1 through the contact between the positioning sleeve 4 and the assembly hole 3 on its outer wall. The bolts 5 mainly bear the axial preload tension, while the shear force they experience is borne by the positioning sleeve 4. The excellent shear resistance of the alloy steel positioning sleeve 4 fundamentally solves the problem of bolts 5 being prone to shear breakage. Meanwhile, the multi-point interconnected structure and rubber gaskets of the anti-loosening fastener 6 provide excellent vibration and anti-loosening performance, and all tightening operations can be completed on the outside of the frame 1 or in a relatively spacious area, without the need for workers to enter the machine body to handle the nuts, which greatly improves the safety, convenience, standardization and efficiency of installation and maintenance.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A bearing housing positioning assembly for a jaw crusher, characterized in that: The assembly includes a frame (1) and a bearing housing (2). The frame (1) and the bearing housing (2) are provided with multiple sets of mutually cooperating assembly holes (3). The multiple sets of assembly holes (3) are arranged at equal angles around the bearing housing (2). A positioning screw sleeve (4) passes through the assembly hole (3). A bolt (5) passes through the positioning screw sleeve (4). A locking device (6) is threaded onto the bolt (5).

2. The bearing housing positioning assembly for a jaw crusher according to claim 1, characterized in that: The anti-loosening fastener (6) includes a fixing plate (601), on which multiple sets of threaded holes (602) are provided, and the threaded holes (602) are threadedly connected to the bolt (5).

3. A bearing housing positioning assembly for a jaw crusher according to claim 2, characterized in that: The fixing plate (601) has a fan-shaped structure, and a rubber gasket is fixedly connected to the inner side of the fixing plate (601). The position of the threaded hole (602) corresponds to the assembly hole (3).

4. A bearing housing positioning assembly for a jaw crusher according to claim 1, characterized in that: The positioning screw sleeve (4) is made of alloy steel and has mounting holes (7) for bolts (5) to pass through.

5. A bearing housing positioning assembly for a jaw crusher according to claim 1, characterized in that: The end of the positioning screw sleeve (4) is fixedly connected to a limiting baffle (8), the size of which is larger than the size of the assembly hole (3).

6. A bearing housing positioning assembly for a jaw crusher according to claim 1, characterized in that: The length of the positioning screw sleeve (4) is less than the sum of the lengths of the two assembly holes (3).

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