High-speed saw wheel seat with aligning function

Abstract

A high-speed saw wheel seat with a self-aligning function comprises a main machine seat, a mounting cavity is formed in the main machine seat, a front bearing seat is mounted at the front end of the mounting cavity, a main shaft is mounted in the front bearing seat through a front self-aligning bearing, a rear bearing seat is mounted at the rear end of the mounting cavity through a displacement device, and the main shaft is mounted in the rear bearing seat through a rear self-aligning bearing. And the main shaft is rotationally mounted on the main engine base through a front self-aligning bearing and a rear self-aligning bearing. The utility model has the beneficial effects that the displacement device is arranged between the rear bearing seat and the rear end of the mounting cavity of the main engine seat, and the front and rear self-aligning bearings are matched to mount the main shaft, so that the axis of the main shaft is adjusted.

Description

Technical Field

[0001] This utility model relates to a woodworking machine, specifically a high-speed saw wheel seat with self-aligning function. Background Technology

[0002] Band saws, especially band saws, are important pieces of equipment widely used for cutting and processing materials such as metal and wood. A typical band saw usually consists of at least two saw wheels, one drive wheel and one driven wheel (or both driven wheels, driven by a separate motor). A flexible, annular saw band is tensioned on these two saw wheels. The rotation of the saw wheels drives the saw band to move in a high-speed linear motion, thereby cutting the workpiece.

[0003] During the operation of a sawing machine, the stability and rotational accuracy of the saw wheels are crucial. Each saw wheel is typically mounted on a saw wheel holder via a spindle, which is supported by bearings (such as rolling bearings) installed within the saw wheel holder. To ensure smooth operation of the saw band, high cutting accuracy, and a long equipment life, the axes of the two saw wheels must remain strictly parallel, and the spindle of each saw wheel itself needs to be precisely supported to ensure the stability of its rotation axis. This requires that the front and rear bearings supporting the spindle have good concentricity.

[0004] However, in existing technologies, the structural design and assembly of saw wheel holders often face the following challenges and drawbacks: 1. Difficulty in ensuring concentricity: Traditional saw wheel holders typically rely on high-precision machining to ensure the concentricity of the bearing mounting holes (or bearing housings). For example, the mounting cavities or holes on the main unit for mounting the front and rear bearing housings are machined in a single clamping operation. However, this not only places extremely high demands on machining equipment and processes, increasing manufacturing costs, but also makes it difficult to completely guarantee that the front and rear bearings achieve the ideal concentricity during actual assembly due to factors such as accumulated manufacturing tolerances, assembly errors, or installation stress.

[0005] The problems are exacerbated under high-speed operation: Especially on high-speed saws, the spindle speed is very high, and even a small concentricity deviation (i.e., the center axes of the front and rear bearings do not coincide) will generate significant periodic stress, vibration, and noise under high-speed rotation. This will not only accelerate the wear of the bearings and spindle, shorten their service life, reduce the smoothness of the saw wheel's operation, and affect the cutting quality, but in severe cases, it may even lead to bearing overheating and failure.

[0006] Risk of saw band detachment: The concentricity of the saw wheel spindle support directly affects the rotational attitude of the saw wheel itself. If the concentricity difference between the front and rear bearings is too large, it will cause the spindle to wobble during rotation, which in turn will cause the saw wheel to wobble during rotation. This wobbling will cause uneven stress on the saw band tensioned on the saw wheel, making it easy for the saw band to fail to stay stably on the saw wheel rim during high-speed operation, eventually leading to lateral slippage or even complete detachment. Saw band detachment will not only interrupt production and damage the saw band and workpiece, but may also cause serious safety accidents.

[0007] The self-aligning structure is complex and difficult to adjust: To solve the concentricity problem, some existing designs employ structures with a certain degree of self-aligning capability. However, most existing adjustment methods only adjust the relative position between the saw wheel base and the main unit, compensating for limited angular deviations and proving ineffective for larger concentricity errors. Furthermore, existing saw wheel self-aligning structures are often complex, time-consuming, labor-intensive, requiring experienced technicians, and the adjustment accuracy is difficult to guarantee. In many cases, repeated disassembly, measurement, and shim addition / reduction are necessary, resulting in low adjustment efficiency and failing to meet the demands of rapid production and maintenance. Therefore, further improvements are necessary. Utility Model Content

[0008] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a high-speed saw wheel holder with self-aligning function that is simple in structure, easy to adjust, has high adjustment accuracy, and a wide adjustment range.

[0009] The purpose of this utility model is achieved in the following way: a high-speed saw wheel holder with self-aligning function, which includes a main body base, a mounting cavity provided in the main body base, a front bearing seat installed at the front end of the mounting cavity, a main shaft installed in the front bearing seat through a front self-aligning bearing, a rear bearing seat installed at the rear end of the mounting cavity through a displacement device, a main shaft installed in the rear bearing seat through a rear self-aligning bearing, and the main shaft is rotatably mounted on the main body base through the front self-aligning bearing and the rear self-aligning bearing.

[0010] Furthermore, the displacement device includes a sliding plate fixed to the end face of the rear bearing housing and a guide plate fixed to the rear end of the mounting cavity. The end face of the guide plate is provided with a vertically extending guide area. The sliding plate is embedded in the guide area. The sliding plate moves laterally and longitudinally relative to the guide area to adjust the concentricity between the rear bearing housing and the front bearing housing.

[0011] Furthermore: the guide area is covered with cover plates on both sides, and the cover plates and the guide area together form a guide groove, and the sliding plate is clamped and installed in the guide groove on both sides.

[0012] Furthermore, pads are installed between the left and right end faces of the sliding plate and the guide groove, and the lateral displacement of the sliding plate is adjusted by using the pads.

[0013] Furthermore: The upper or lower end face of the guide plate is provided with an adjustment plate, and an adjustment bolt is screwed onto the sliding plate and connected to the adjustment plate. The adjustment bolt drives the sliding plate to slide longitudinally, thereby adjusting the longitudinal displacement of the sliding plate.

[0014] Furthermore, a locking nut is also screwed onto the height adjustment bolt.

[0015] The beneficial effects of this utility model are: 1. Simple structure, low production cost, and improved market competitiveness.

[0016] 2. By setting a displacement device between the rear bearing housing and the rear end of the mounting cavity of the main body, and using front and rear self-aligning bearings to install the spindle, active, precise and convenient adjustment of the spindle axis position (i.e., the concentricity of the front and rear bearings) is achieved.

[0017] 2. The use of front and rear self-aligning bearings allows the spindle to have angular misalignment within a certain range without affecting its smooth rotation. This provides the necessary basis for adjusting the position of the rear bearing housing through a displacement device. In other words, when the rear bearing housing is moved by the displacement device, the self-aligning bearing can adapt to this positional change, avoiding jamming or stress concentration caused by rigid constraints during the adjustment process, making the adjustment process smoother.

[0018] 3. The displacement device provides a dedicated mechanism for adjusting the lateral and longitudinal position of the rear bearing housing. Operators can easily and quickly change the position of the rear bearing housing without complex disassembly or reliance on high-precision machining, simply by adjusting the thickness or number of shims or rotating the height adjustment bolts. This precisely adjusts the support centers at both ends of the spindle to achieve ideal concentricity. This greatly simplifies the complex process of adjusting the concentricity of traditional saw wheel seats and improves assembly and maintenance efficiency.

[0019] 4. Through precise adjustment of the displacement device, accumulated errors generated during manufacturing and assembly can be effectively compensated, ensuring extremely high concentricity of the bearings in the front and rear bearing housings. This high concentricity ensures smoother spindle rotation at high speeds, significantly reducing vibration and noise caused by eccentricity.

[0020] 5. Precise concentricity prevents abnormal wear and premature failure of bearings due to additional off-center loads, and also reduces fatigue damage to the spindle caused by uneven stress. This effectively extends the service life of core components and improves the operational reliability and durability of the entire high-speed saw wheel holder and even the sawing machine. Attached Figure Description

[0021] Figure 1 , 2 This is a rendering of the final assembly of this utility model.

[0022] Figure 3 This is a vertical structural cross-sectional view of the present invention.

[0023] Figure 4 This is a cross-sectional view of the horizontal structure of this utility model.

[0024] Figure 5 This is an exploded view of the assembly of this utility model. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings. A high-speed saw wheel holder with self-aligning function includes a main body base 1, a mounting cavity 2 provided in the main body base 1, a front bearing seat 3 mounted at the front end of the mounting cavity 2, a main shaft 5 mounted in the front bearing seat 3 via a front self-aligning bearing 4, a rear bearing seat 6 mounted at the rear end of the mounting cavity 2 via a displacement device, and a main shaft 5 mounted in the rear bearing seat 6 via a rear self-aligning bearing 7. The main shaft 5 is rotatably mounted on the main body base 1 via the front self-aligning bearing 4 and the rear self-aligning bearing 7, and the saw wheel is mounted on the main shaft.

[0026] In this embodiment, the spindle 5 is supported within the mounting cavity 2 of the main unit base 1 by bearings in the front and rear bearing housings. Both the front and rear bearings are self-aligning bearings. Self-aligning bearings allow the inner ring or shaft to deflect relative to the outer ring or bearing housing within a certain range without generating excessive internal stress or jamming. This means that even if the central axes of the front and rear bearing housings are not perfectly aligned and there is a concentricity error, the spindle 5 can still rotate relatively smoothly, and the bearings can self-adjust to accommodate this angular deviation.

[0027] Unlike the front bearing housing 3, the rear bearing housing 6 is not directly fixed to the mounting cavity 2, but is installed via a displacement device. This displacement device allows the position of the rear bearing housing 6 relative to the main unit housing 1 to be adjustable.

[0028] Among them, the adjustable rear bearing housing 6 and the self-aligning bearing that can adapt to angular deviations provide the possibility and basis for subsequent adjustment of the relative position of the front and rear support points of the spindle, that is, adjustment of concentricity.

[0029] In one embodiment, the displacement device includes a sliding plate 8 fixed to the end face of the rear bearing housing 6 and a guide plate 9 fixed to the rear end of the mounting cavity 2. The end face of the guide plate 9 is provided with a vertically extending guide area 10. The sliding plate 8 is embedded in the guide area 10. The sliding plate 8 moves laterally and longitudinally relative to the guide area 10 to adjust the concentricity between the rear bearing housing 6 and the front bearing housing 3.

[0030] A sliding plate 8 is fixed to the rear bearing housing 6. A guide plate 9 is fixed to the rear of the mounting cavity 2 of the main unit base 1, and a guide area 10 is provided on the guide plate 9. The sliding plate 8 is installed in the guide area 10 and is designed to move relative to the rear bearing housing 6 in both the lateral (left-right) and longitudinal (up-down) directions within the guide area 10. Since the sliding plate 8 is fixed to the rear bearing housing 6, the movement of the sliding plate 8 directly drives the movement of the rear bearing housing 6.

[0031] It should be noted that by controlling the two-dimensional lateral and longitudinal positions of the sliding plate 8 within the guide area 10, the spatial position of the rear bearing seat 6 can be precisely adjusted, thereby changing the center position of the rear support point of the spindle 5, and ultimately achieving the purpose of adjusting the concentricity of the spindle 5 relative to the front bearing seat 3.

[0032] In one embodiment, the guide area 10 is covered by cover plates 11 on both sides, forming a guide groove 12 between the cover plates 11 and the guide area 10. The sliding plate 8 is clamped and installed within this guide groove 12 on both sides. By adding cover plates 11 to both sides of the guide area 10, a guide groove 12 with a clearly defined boundary is formed. The sides of the sliding plate 8 are confined within this guide groove 12. The guide groove 12 provides precise guidance and constraint for the movement of the sliding plate 8. It ensures that the sliding plate 8 can only move along a preset path, preventing tilting, rotation, or other undesirable displacements during adjustment. This guide groove 12 structure provides more stable and precise guidance, ensuring the linearity and smoothness of the sliding plate 8's movement, thereby improving the accuracy and reliability of concentricity adjustment. At the same time, the formation of a closed or semi-closed groove structure provides stronger constraint on the sliding plate.

[0033] In one embodiment, shims 13 are installed between the left and right end faces of the sliding plate 8 and the guide groove 12, and the shims 13 are used to adjust the lateral displacement of the sliding plate 8. Shims 13, typically precisely-thickened shims or blocks, are placed between the left and right sides of the sliding plate 8 and the side walls of the guide groove 12. By changing the total thickness of these shims 13—for example, increasing or decreasing the number of shims or replacing them with shims of different thicknesses—the lateral position of the sliding plate 8 within the guide groove 12 can be precisely controlled. Increasing the thickness of one shim will move the sliding plate to the other side. Using shims for adjustment, once a suitable combination of shims is selected, the position can be precisely fixed, resulting in good stability.

[0034] In one embodiment, an adjustment plate 14 is provided on the upper or lower end face of the guide plate 9. An adjustment bolt 15 is screwed onto the sliding plate 8 and connected to the adjustment plate 14. The adjustment bolt 15 drives the sliding plate 8 to slide longitudinally, adjusting the longitudinal displacement of the sliding plate 8. The sliding plate 8 is equipped with a rotatable adjustment bolt 15, the end of which is connected to the adjustment plate 14. Rotating the adjustment bolt 15, utilizing the self-locking and transmission action of the thread, causes the bolt to generate axial displacement relative to the sliding plate 8. Due to the interaction between the bolt end and the fixed adjustment plate 14, this axial displacement is converted into longitudinal sliding of the sliding plate 8 within the guide groove 12. By rotating the bolt, the position of the sliding plate 8 can be precisely raised or lowered. Compared to a shim, bolt adjustment can typically achieve more continuous or smaller step adjustments, and the adjustment process may be faster.

[0035] In one embodiment, a locking nut 16 is also screwed onto the height adjustment bolt 15. After the sliding plate 8 is adjusted to the desired longitudinal position by rotating the height adjustment bolt 15, the locking nut 16 is tightened. The locking nut 16 generates a preload or frictional force to prevent the height adjustment bolt 15 from rotating accidentally due to vibration or other reasons, thereby locking the adjusted longitudinal position. This added locking function ensures the long-term stability of the longitudinal adjustment position, prevents adjustment failure due to vibration or other factors during equipment operation, and ensures that the concentricity adjustment state can be reliably maintained.

[0036] In summary, operators can easily and quickly change the precise position of the rear bearing seat 6 by simply adjusting the shim 13 and rotating the height adjustment bolt 15, so that the center heights of the front and rear self-aligning bearings coincide. This allows for easy high-precision self-alignment of the spindle, ensuring the high-speed and stable operation of the saw wheel, extending its service life, and effectively preventing problems such as saw blade detachment caused by concentricity differences. Therefore, it can be widely promoted and used.

[0037] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of the claims of this invention.

Claims

1. A high speed saw wheel stand with a self-aligning function, characterized in that: It includes a main body base (1), a mounting cavity (2) is provided in the main body base (1), a front bearing housing (3) is installed at the front end of the mounting cavity (2), a spindle (5) is installed in the front bearing housing (3) through a front self-aligning bearing (4), a rear bearing housing (6) is installed at the rear end of the mounting cavity (2) through a displacement device, a spindle (5) is installed in the rear bearing housing (6) through a rear self-aligning bearing (7), and the spindle (5) is rotatably mounted on the main body base (1) through the front self-aligning bearing (4) and the rear self-aligning bearing (7).

2. The high speed saw wheel seat with a self-aligning function according to claim 1, characterized in that: The displacement device includes a sliding plate (8) fixed on the end face of the rear bearing housing (6) and a guide plate (9) fixed on the rear end of the mounting cavity (2). The end face of the guide plate (9) is provided with a vertically extending guide area (10). The sliding plate (8) is embedded in the guide area (10). The sliding plate (8) moves laterally and longitudinally relative to the guide area (10) to adjust the concentricity between the rear bearing housing (6) and the front bearing housing (3).

3. The high speed saw wheel seat with a self-aligning function according to claim 2, characterized in that: The guide area (10) is covered by cover plates (11) on both sides, and the cover plates (11) and the guide area (10) together form a guide groove (12), and the sliding plate (8) is clamped and installed in the guide groove (12) on both sides.

4. The high speed saw wheel seat with a self-aligning function according to claim 3, characterized in that: A pad (13) is installed between the left and right end faces of the sliding plate (8) and the guide groove (12), and the lateral displacement of the sliding plate (8) is adjusted by using the pad (13).

5. The high speed saw wheel seat with a self-aligning function according to claim 3, characterized in that: The guide plate (9) is provided with an adjustment plate (14) on its upper or lower end face. An adjustment bolt (15) is screwed onto the sliding plate (8) and connected to the adjustment plate (14). The adjustment bolt (15) drives the sliding plate (8) to slide longitudinally and adjusts the longitudinal displacement of the sliding plate (8).

6. The high speed saw wheel seat with a self-aligning function according to claim 5, characterized in that: The height adjustment bolt is also screwed with a locking nut (16).

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