Unpowered bearing bracket for centerless grinding machine

Abstract

The unpowered bearing bracket for the centerless grinding machine comprises a base and a supporting plate, a plurality of driven bearings are arranged on the top of the supporting plate, the length and the height of the base and the supporting plate can be changed according to different machine types, the driven bearings are arranged on a main shaft, and the main shaft is fixed to the top of the supporting plate. A plurality of long circular holes are formed in the surface of the supporting plate, the supporting plate penetrates through the long circular holes through fastening screws and then is fixedly connected with the mounting vertical plate, a mounting bottom plate is arranged at the bottom of the mounting vertical plate, the mounting vertical plate and the mounting bottom plate are matched to form a base, and the mounting bottom plate is used for being fixed to a mounting position of the centerless grinding machine. The friction force of the workpiece is effectively reduced, self-adaptive rotation can be achieved, and the grinding quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of centerless grinding equipment, and particularly relates to a power-free bearing bracket for a centerless grinding machine. Background Art

[0002] A centerless grinding machine is a type of grinding machine that does not require the axial positioning of a workpiece for grinding, and mainly consists of mechanisms such as a grinding wheel, a power-driven idler, and a workpiece support. Among them, the grinding wheel is responsible for grinding, the power-driven idler controls the rotation of the workpiece, and the workpiece support supports the workpiece during grinding.

[0003] The existing workpiece supports all adopt inclined alloy support plates, and the top surface of the support plate is provided with an inclined plane. When the workpiece enters and exits, since the bottom of the support plate is a plane and the two are in surface contact, the friction between the workpiece and the support plate is large. Therefore, the workpiece cannot be driven to rotate at a constant speed. At this time, the grinding wheel will cause scratches on the head and tail of the workpiece, affecting the roundness quality. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to provide a power-free bearing bracket for a centerless grinding machine, which can effectively reduce friction, can rotate adaptively, and improve the grinding quality.

[0005] To solve the above technical problem, the utility model provides a power-free bearing bracket for a centerless grinding machine, including a support plate. A plurality of driven bearings are arranged on the top of the support plate, and the plurality of driven bearings are arranged on a main shaft. The main shaft is fixed on the top of the support plate. A plurality of oblong holes are arranged on the surface of the support plate. The support plate is fixedly connected with an installation vertical plate through fastening screws passing through the oblong holes. An installation bottom plate is arranged at the bottom of the installation vertical plate, and the installation bottom plate is used for being fixed at the installation position of the centerless grinding machine.

[0006] Further, an L-shaped installation part is arranged on the top of the support plate corresponding to the main shaft. The surface of the main shaft abuts against the two inner walls of the L-shaped installation part. An avoidance concave part for avoiding the driven bearing is arranged on the L-shaped installation part and forms a plurality of installation fingers. A fixing block is further arranged on the surface of the support plate. The fixing block cooperates with the installation fingers to clamp the main shaft tightly. The L-shaped installation part and the fixing block cooperate to form a U-shaped installation structure.

[0007] Further, a first avoidance inclined plane is arranged on the top surfaces of both the fixing block and the installation fingers.

[0008] Further, an arc-shaped concave surface is arranged on the fixing block, and the fixing block abuts against the surface of the driven bearing through the arc-shaped concave surface.

[0009] Furthermore, the two inner walls of the L-shaped mounting portion form an acute angle, and the surface of the fixed block on the side of the driven bearing is provided with an acute-angle inclined surface. The two inner walls of the L-shaped mounting portion cooperate with the acute-angle inclined surface of the fixed block to form a three-point limit on the outer periphery of the main shaft.

[0010] Furthermore, a second avoidance inclined surface is provided on the fixed surface of the mounting vertical plate.

[0011] Furthermore, U-shaped locking grooves are provided on both sides of the mounting base plate along the axial direction of the main shaft.

[0012] Furthermore, an installation card slot is provided at the bottom of the mounting base plate along the axial direction of the main shaft.

[0013] Advantages of the present utility model:

[0014] 1. The workpiece is supported by the driven bearing, and rolling friction is formed between the workpiece and the driven bearing, with small frictional force. When the workpiece enters the grinding process, it can quickly reach a uniform rotation speed, and when the workpiece exits, it can still achieve a uniform rotation effect. The grinding wheel will not cause abrasions to the head and tail of the workpiece, ensuring the roundness of the workpiece and the dimensional tolerance of the whole body.

[0015] 2. The support plate can be adjusted in height through the oblong holes to adapt to workpieces of different sizes, and this bracket can be adapted to grinding machines of different models. Description of the drawings

[0016] Figure 1 is the overall structural schematic diagram of the present utility model;

[0017] Figure 2 is the partial structural schematic diagram of the support plate of the present utility model;

[0018] Figure 3 is the matching structural schematic diagram of the main shaft and the top of the support plate of the present utility model;

[0019] Figure 4 is the present utility model Figure 1 of the rear structural schematic diagram;

[0020] Figure 5 is the structural schematic diagram of the bottom of the mounting base plate of the present utility model;

[0021] Figure 6 is the matching structural schematic diagram of the main shaft and the top of the support plate in an embodiment of the present utility model. Detailed implementation manners

[0022] The present utility model will be further described below in conjunction with the drawings and specific embodiments, so that those skilled in the art can better understand the present utility model and be able to implement it, but the embodiments cited do not limit the present utility model.

[0023] Referring to Figures 1 to 5 As shown, an embodiment of the non-powered bearing bracket for a centerless grinding machine of the present utility model includes a support plate 1. A number of driven bearings 2 are arranged on the top of the support plate. The number of driven bearings is arranged on a main shaft 3, and the main shaft is fixed on the top of the support plate. A number of oblong holes 4 are arranged on the surface of the support plate. The support plate is fixedly connected with an installation vertical plate 6 through fastening screws 5 passing through the oblong holes. An installation bottom plate 7 is arranged at the bottom of the installation vertical plate, and the installation bottom plate is used to be fixed at the installation position of the centerless grinding machine. The tops of multiple driven bearings are located on the same straight line. The multiple driven bearings cooperate with the grinding wheel and the power top wheel to form a grinding space for grinding the workpiece.

[0024] Specifically, the workpiece is a cylindrical rod shaft or the like. The workpiece enters the grinding space along the axial direction. The power top wheel drives the workpiece to rotate and cooperates with the grinding wheel to grind the surface of the workpiece. Among them, the workpiece is supported by multiple driven bearings, and a rolling friction is formed between the workpiece and the driven bearings, with small friction. When the workpiece enters, it can quickly accelerate and reach a uniform rotation speed. When the workpiece flows out, due to the small friction, it can still maintain a sufficient rotation speed, thus avoiding damage to the head and tail of the workpiece by the grinding wheel.

[0025] Since the driven bearings need to support the workpiece, there are problems of wear and damage. In order to improve the convenience of maintenance and assembly accuracy, an L-shaped installation part 8 is arranged on the top of the support plate corresponding to the main shaft. The surface of the main shaft abuts against the two inner walls of the L-shaped installation part, forming an effect of two-point tangential positioning with accurate installation position. An avoidance recess 9 for avoiding the driven bearings is arranged on the L-shaped installation part and several installation fingers 10 are formed. The driven bearings are arranged on the main shaft at intervals and are located in the avoidance recess. A fixing block 11 is also arranged on the surface of the support plate. The fixing block cooperates with the installation fingers to clamp the main shaft, so that both ends of the main shaft of the driven bearings can be supported, improving the overall strength. An arc-shaped concave surface 13 is arranged on the fixing block. The fixing block abuts against the surface of the driven bearing through the arc-shaped concave surface, forming an effective limiting effect in the vertical direction while clamping in the horizontal direction, with stable installation. And when disassembling, only the fixing block needs to be loosened, and the main shaft together with the driven bearings can be removed, which is convenient and fast.

[0026] First avoidance inclined surfaces 12 are arranged on the top surfaces of the fixing block and the installation fingers, and a second avoidance inclined surface 14 is arranged on the fixed surface of the installation vertical plate to avoid interference with the grinding wheel and the power top wheel.

[0027] To ensure the accuracy of the installation position of the bracket, U-shaped locking grooves 15 are provided on both sides of the mounting base along the axial direction of the main shaft. Screws pass through the U-shaped locking grooves and are locked with the mounting positions of the centerless grinding machine. The two U-shaped locking grooves can ensure that the mounting base is always between the two screws and also have the effect of fine-tuning the position. Specifically, a mounting slot 16 is provided at the bottom of the mounting base along the axial direction of the main shaft. When fine-tuning the position, the bracket can only move along the axial direction, so as to ensure that all the driven bearings at the top can always be in contact with the surface of the workpiece.

[0028] In one embodiment, referring to Figure 6 as shown, the present application also provides a method for fixing the main shaft. Among them, the two inner walls of the L-shaped mounting portion form an acute angle. The surface of the fixing block on the side of the driven bearing is provided with an acute-angle inclined surface. The two inner walls of the L-shaped mounting portion cooperate with the acute-angle inclined surface of the fixing block to form three-point limit on the outer circumference of the main shaft. The preparation is simple and can form limit and fixation on the outer circumference of the main shaft.

[0029] The above embodiments are only preferred embodiments given to fully illustrate the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present invention are all within the protection scope of the present invention.

Claims

1. A non-powered bearing bracket for a centerless grinder, characterized in that: It includes a support plate, a plurality of driven bearings are arranged on the top of the support plate, the plurality of driven bearings are arranged on a main shaft, the main shaft is fixed on the top of the support plate, a plurality of oblong holes are arranged on the surface of the support plate, the support plate is fixedly connected to the mounting vertical plate after fastening screws pass through the oblong holes, a mounting base plate is arranged at the bottom of the mounting vertical plate, and the mounting base plate is used to be fixed on the mounting position of the centerless grinder.

2. The non-powered bearing bracket for a centerless grinder according to claim 1, characterized in that: An L-shaped mounting portion is provided on the top of the support plate corresponding to the main shaft, and the surface of the main shaft abuts against the two inner walls of the L-shaped mounting portion. The L-shaped mounting portion is provided with an avoidance recess for avoiding the driven bearing and forms a plurality of mounting fingers. A fixing block is also provided on the surface of the support plate, and the fixing block cooperates with the mounting fingers to clamp the main shaft, and the L-shaped mounting portion cooperates with the fixing block to form a U-shaped mounting structure.

3. The non-powered bearing bracket for a centerless grinder according to claim 2, characterized in that: The fixing block and the top surface of the mounting finger are both provided with a first avoidance slope.

4. The non-powered bearing bracket for a centerless grinder according to claim 2, characterized in that: The fixing block is provided with an arc-shaped concave surface, and the fixing block abuts against the surface of the driven bearing through the arc-shaped concave surface.

5. The non-powered bearing bracket for a centerless grinder according to claim 2, characterized in that: The two inner walls of the L-shaped mounting portion are at an acute angle, and the surface of the fixed block located on the side of the driven bearing is provided with an acute angle slope. The two inner walls of the L-shaped mounting portion cooperate with the acute angle slope of the fixed block to form a three-point limit on the outer periphery of the main shaft.

6. The non-powered bearing bracket for a centerless grinder according to claim 1, characterized in that: A second avoidance slope is arranged on the fixed surface of the mounting vertical plate.

7. The non-powered bearing bracket for a centerless grinder according to claim 1, characterized in that: The installation base plate is provided with U-shaped locking grooves on both sides along the axial direction of the main shaft.

8. The non-powered bearing bracket for a centerless grinder according to claim 1, characterized in that: The bottom of the installation base plate is provided with an installation slot arranged along the axial direction of the main shaft.

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