Electromagnetic centerless clamp for bearing ring

Abstract

The utility model belongs to the technical field of bearing clamps, and particularly relates to a bearing ring electromagnetic centerless clamp which comprises a fixed fulcrum and a floating fulcrum which are used for supporting a workpiece. The fixed fulcrum is rotationally supported on the circumferential surface of a workpiece; the floating fulcrum comprises a first supporting rod and a fulcrum seat, the fulcrum seat is connected with the first supporting rod through a floating shaft, the floating shaft is in clearance fit with the fulcrum seat, an elastic check ring is installed on the floating shaft, two rotating supporting heads are arranged on the fulcrum seat, and the rotating supporting heads are connected with the first supporting rod. The two rotary supporting heads make contact with a workpiece and are driven by the workpiece to conduct floating rotary supporting. The floating fulcrum can float up and down in the workpiece machining process, outer diameter scratching is avoided when an outer raceway is machined, the outer diameter grinding amount is compressed, grinding heat is controlled, the product quality is improved, the production cost is reduced, and the machining efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of bearing clamps, and in particular relates to an electromagnetic centerless clamp for a bearing ring. Background Art

[0002] The traditional electromagnetic centerless clamping tool is prone to scratches on the outer diameter when machining the outer raceway of the bearing, resulting in insufficient grinding of the outer diameter and waste. If the grinding amount is increased, a large amount of grinding heat will be generated during the final grinding, and the temperature rise is not well controlled, which is also prone to waste. Therefore, a new processing method is needed to solve this problem. Summary of the invention

[0003] In view of the defects of the above-mentioned prior art, the purpose of the utility model is to provide an electromagnetic centerless clamp for a bearing ring, so as to solve the problem of outer diameter scratches caused by traditional clamps and improve the processing quality of the bearing ring.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a bearing ring electromagnetic centerless clamp, including a fixed fulcrum and a floating fulcrum for supporting a workpiece; the fixed fulcrum is rotatably supported on the circumferential surface of the workpiece; the floating fulcrum includes a first supporting rod and a fulcrum seat, the fulcrum seat is connected to the first supporting rod through a floating shaft, the floating shaft and the fulcrum seat are clearance-matched, an elastic retaining ring is installed on the floating shaft, and two rotating support heads are arranged on the fulcrum seat, the two rotating support heads are in contact with the workpiece and are driven by the workpiece for floating rotating support.

[0005] Furthermore, the fixed fulcrum includes a second supporting rod and a rotating supporting head arranged on the second supporting rod, and the rotating supporting head is in contact with the workpiece and is driven by the workpiece to perform fixed rotating support.

[0006] Furthermore, the rotary support head comprises a support shaft and a bearing, wherein the bearing is rotatably arranged on the support shaft, and the bearing is in contact with the workpiece and is driven by the workpiece for rotational support.

[0007] Furthermore, a rotating support head is installed on the floating fulcrum, and a mounting groove is opened at the end of the fulcrum seat close to the workpiece. Both ends of the supporting shaft are arranged on the fulcrum seat and fastened by hexagonal thin nuts. The bearing is assembled in the mounting groove, and gaskets are arranged between the two ends of the bearing and the inner wall of the mounting groove of the fulcrum seat.

[0008] Furthermore, the fulcrum seat is a V-shaped structure or a Y-shaped structure, the bottom of the fulcrum seat is connected to the first support rod through a floating shaft, and rotating support heads are arranged at two ends of the upper part of the fulcrum seat.

[0009] Furthermore, a rotating support head is installed on the fixed fulcrum, a mounting groove is opened at the end of the second support rod, both ends of the support shaft are arranged on the second support rod and fastened by hexagonal thin nuts, the bearing is assembled in the mounting groove, and gaskets are arranged between the two ends of the bearing and the inner wall of the mounting groove of the second support rod.

[0010] Furthermore, the bearing is a fully sealed deep groove ball bearing.

[0011] Furthermore, the first support rod and the second support rod are provided with oblong holes for fixing.

[0012] The beneficial effects of the utility model are as follows: the floating fulcrum of the utility model can float up and down during the workpiece processing, avoiding outer diameter scratches when processing the outer raceway, compressing the outer diameter grinding amount, controlling the generation of grinding heat, improving product quality, reducing production costs, and improving processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Schematic diagram of floating fulcrum structure;

[0014] Figure 2 for Figure 1 A side cross-sectional view of a floating pivot;

[0015] Figure 3 for Figure 1 AA view of floating pivot;

[0016] Figure 4 It is a schematic diagram of the fixed fulcrum structure;

[0017] Figure 5 for Figure 4 Side view of the fixed fulcrum;

[0018] Figure 6 This is a schematic diagram of workpiece grinding process;

[0019] In the figure: 1. first supporting rod, 2. fulcrum seat, 3. elastic retaining ring, 4. floating shaft, 5. gasket, 6. fully sealed deep groove ball bearing, 7. supporting shaft, 8. hexagonal thin nut, 9. oblong hole, 10. second supporting rod, 11. workpiece, 12. grinding wheel, 13. magnetic pole, 14. fixed fulcrum, 15. floating fulcrum. DETAILED DESCRIPTION

[0020] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0021] Referring to the accompanying drawings, a bearing ring electromagnetic centerless fixture includes a fixed fulcrum and a floating fulcrum for supporting a workpiece; the floating fulcrum is as follows Figure 1-3 , including a first support rod 1 and a fulcrum seat 2, the fulcrum seat 2 is a V-shaped structure or a Y-shaped structure, the bottom of the fulcrum seat 2 is connected to the first support rod 1 through a floating shaft 4, the floating shaft 4 is in clearance fit with the fulcrum seat 2, and an elastic retaining ring 3 is mounted on the floating shaft 4, and mounting grooves are provided at the two ends of the upper part of the fulcrum seat 2, and a rotating support head is arranged in the mounting groove, and the rotating support head includes a support shaft 7 and a fully sealed deep groove ball bearing 6, the fully sealed deep groove ball bearing 6 is rotatably arranged on the support shaft 7, the fully sealed deep groove ball bearing 6 is in contact with the workpiece 11 and is driven by the workpiece for rotational support, the two ends of the support shaft 7 are arranged on the fulcrum seat 2 and are fastened by hexagonal thin nuts 8, and gaskets 5 are arranged between the two ends of the fully sealed deep groove ball bearing 6 and the inner wall of the fulcrum seat mounting groove. The first support rod 1 is provided with an oblong hole 9 for fixing the floating fulcrum.

[0022] Based on the above technical solution, the floating shaft 4 is gap-matched with the fulcrum seat 2 and is fitted with an elastic retaining ring 3. The compression deformation of the elastic retaining ring 3 enables the floating shaft 4 to float up and down within the gap range, so that the fulcrum seat 2 can float up and down during the workpiece processing.

[0023] In this embodiment, the fixed fulcrum is rotatably supported on the peripheral surface of the workpiece. Figure 4-5 The fixed fulcrum includes a second support rod 10 and a rotating support head arranged on the second support rod 10. The end of the second support rod 10 is provided with a mounting groove, and the rotating support head is assembled in the mounting groove. The rotating support head includes a supporting shaft 7 and a fully sealed deep groove ball bearing 6. The fully sealed deep groove ball bearing 6 is rotatably arranged on the supporting shaft 7. The fully sealed deep groove ball bearing 6 is in contact with the workpiece 11 and is driven by the workpiece for fixed rotation support. The two ends of the supporting shaft 7 are arranged on the second support rod 10 and fastened by a hexagonal thin nut 8. A gasket 5 is arranged between the two ends of the fully sealed deep groove ball bearing 6 and the inner wall of the second support rod mounting groove. The second support rod 10 is provided with an oblong hole 9 for installing the fixed fulcrum.

[0024] The working status of this fixture is as follows Figure 6As shown, the floating fulcrum supports the lower right side of the workpiece, and the fixed fulcrum supports the lower left side of the workpiece. When processing the outer raceway, the workpiece and the grinding wheel rotate clockwise, and the floating shaft 4 on the floating fulcrum and the fulcrum seat 2 are clearance-matched, so that the fulcrum seat 2 can float up and down during the workpiece processing, and then the workpiece can fine-tune the eccentricity during the rotation process to improve the shape and position accuracy. At the same time, the outer diameter of the fully sealed deep groove ball bearing is used as support, and the outer diameter of the bearing on the support device is in contact with the outer diameter of the product. Since the hardness of the two is equivalent, the fulcrum mark of the processed product is very light, which minimizes scratches. In this way, the grinding amount of the outer diameter can be compressed to reduce the grinding heat generated during the final grinding of the outer diameter, so that the outer diameter dimensional tolerance can be effectively controlled.

[0025] The key point of the utility model is to use the outer diameter of the deep groove ball bearing as the supporting point for product processing: 1. Eliminate waste products caused by scratches on the outer diameter; 2. Reduce the final grinding amount of the product and improve production efficiency; 3. The fully sealed deep groove ball bearing prevents impurities such as the grinding wheel surface and coolant from entering the fixture during the grinding process, thereby ensuring the rotation accuracy of the fixture, extending the service life, reducing production costs, and improving product quality.

[0026] It should be noted that the parts not described in detail in the present invention are prior art.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" 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 a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0032] The above examples are only the best embodiments of the present invention. Obviously, the present invention is not limited to the above examples, and there are many variations. All variations that can be directly derived or associated with the contents disclosed by a person skilled in the art should be considered as the protection scope of the present invention.

Claims

1. An electromagnetic centerless fixture for a bearing ring, characterized in that: It includes a fixed fulcrum and a floating fulcrum for supporting a workpiece; the fixed fulcrum is rotatably supported on the circumferential surface of the workpiece; the floating fulcrum includes a first supporting rod and a fulcrum seat, the fulcrum seat is connected to the first supporting rod through a floating shaft, the floating shaft and the fulcrum seat are clearance-matched, an elastic retaining ring is mounted on the floating shaft, and two rotating support heads are arranged on the fulcrum seat, the two rotating support heads are in contact with the workpiece and are driven by the workpiece to perform floating rotatable support.

2. The electromagnetic centerless fixture for a bearing ring according to claim 1, characterized in that: The fixed fulcrum includes a second supporting rod and a rotating supporting head arranged on the second supporting rod. The rotating supporting head contacts the workpiece and is driven by the workpiece to perform fixed rotating support.

3. The electromagnetic centerless fixture for a bearing ring according to claim 2, characterized in that: The rotary support head comprises a support shaft and a bearing. The bearing is rotatably arranged on the support shaft. The bearing contacts with the workpiece and is driven by the workpiece for rotation support.

4. The electromagnetic centerless fixture for a bearing ring according to claim 3, characterized in that: A rotating support head is installed on the floating fulcrum, a mounting groove is opened at the end of the fulcrum seat close to the workpiece, both ends of the support shaft are arranged on the fulcrum seat and fastened by hexagonal thin nuts, the bearing is assembled in the mounting groove, and gaskets are arranged between the two ends of the bearing and the inner wall of the mounting groove of the fulcrum seat.

5. The electromagnetic centerless fixture for a bearing ring according to claim 4, characterized in that: The fulcrum seat is a V-shaped structure or a Y-shaped structure. The bottom of the fulcrum seat is connected to the first supporting rod through a floating shaft, and rotating supporting heads are arranged at two ends of the upper part of the fulcrum seat.

6. The electromagnetic centerless fixture for a bearing ring according to claim 3, characterized in that: A rotating support head is installed on the fixed fulcrum, a mounting groove is opened at the end of the second support rod, two ends of the support shaft are arranged on the second support rod and fastened by hexagonal thin nuts, the bearing is assembled in the mounting groove, and gaskets are arranged between the two ends of the bearing and the inner wall of the mounting groove of the second support rod.

7. The electromagnetic centerless fixture for a bearing ring according to claim 3, characterized in that: The bearing is a fully sealed deep groove ball bearing.

8. The electromagnetic centerless fixture for a bearing ring according to claim 2, characterized in that: The first supporting rod and the second supporting rod are provided with oblong holes for fixing.

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