Centerless grinding wheel

Abstract

The utility model provides a centerless grinding wheel. The centerless grinding wheel comprises a grinding wheel body with a central hole, the positioning disc is provided with a mounting groove; the driving assembly is mounted in the mounting groove; the driving disc covers the mounting groove and is driven by the driving assembly to rotate; the connecting disc is fixedly connected to the positioning disc, and the surface, opposite to the positioning disc, of the connecting disc protrudes outwards to form a connecting column penetrating into the center hole of the grinding wheel body; a matching groove is inwards formed in the peripheral face of the connecting column, a clamping groove is correspondingly formed in the inner wall of a center hole of the grinding wheel body, and a corresponding arc-shaped groove is formed in the driving disc. A clamping block with the protruding rod penetrating into the arc-shaped groove is arranged in the matching groove. The driving disc rotates when driven by the driving assembly and extrudes the protruding rods to slide in the arc-shaped grooves so as to drive the clamping blocks to stretch into the clamping grooves or retract into the matching grooves. Locking and unlocking between the grinding wheel body and the connecting disc can be completed by applying force to the driving assembly, operation is easy and convenient, and the grinding wheel has the advantage that the grinding quality is not affected.

Description

Technical Field

[0001] The utility model relates to the technical field of grinding wheels, in particular to a centerless grinding wheel. Background Art

[0002] The centerless grinding wheel is a kind of grinding wheel, mainly used for processing bars and shafts into cemented carbide bar materials. During the centerless grinding process, problems such as poor adhesion, chipping, and unstable grinding will not occur. It has become the grinding tool with the largest consumption and the widest application range. When in use, it can rotate at a high speed to perform rough grinding, semi-finishing grinding, and finishing grinding on the outer circle, inner circle, plane, and various profiles of metal or non-metal workpieces, as well as grooving and cutting.

[0003] Chinese Patent with the authorization announcement number CN209579202U discloses an integrally formed resin-bonded diamond centerless grinding wheel, including a positioning disk. The outer surface of the positioning disk is connected with a combined grinding wheel, and a connecting hole is opened at the center position of the positioning disk. Upper and lower connecting holes are opened inside the combined grinding wheel. A first outer screw rod is inserted into the upper connecting hole. A buckle hole is opened at the middle position of the inner top end of the first outer screw rod, and an inner sliding hole is opened at the position below the inner center line of the first outer screw rod. An inner sliding rod is arranged inside the inner sliding hole. A second outer screw rod is arranged inside the lower connecting hole. A debris collecting arc plate is attached to the bottom end of the combined grinding wheel, and a pulling plate is arranged on the periphery of the combined grinding wheel. A connecting rod is connected between the combined grinding wheel and the pulling plate. An arc groove is opened at the bottom end of the combined grinding wheel, and a square groove is connected at the port of the arc groove.

[0004] Compared with the traditional grinding wheel, the above technical solution has the advantages of simple structure and convenient operation. However, after the grinding wheel is installed or disassembled, there will be pits on the circumferential surface of the grinding wheel, that is, the working surface in contact with the workpiece, which affects the grinding quality of the bar material due to the existence of the pits during the grinding process of the bar material. Summary of the Invention

[0005] In view of the above-mentioned disadvantages of the prior art, the purpose of the present invention is to provide a centerless grinding wheel, which has the advantages of being convenient for disassembly, replacement, and having no influence on the grinding quality.

[0006] To achieve the above purpose and other related purposes, the present invention provides the following technical solutions:

[0007] An centerless grinding wheel, comprising: a grinding wheel body having a central hole; a positioning disk having an installation groove; a driving assembly installed in the installation groove; a driving disk covering the installation groove of the positioning disk and driven by the driving assembly to rotate; a connecting disk fixedly connected to the positioning disk and enclosing a space for the driving disk to rotate with the positioning disk, an outer convex connecting column penetrating into the central hole of the grinding wheel body is formed on the surface of the connecting disk facing away from the positioning disk; a mating groove with a notch facing the driving disk is formed inward on the outer peripheral surface of the connecting column, a clamping groove is formed on the inner wall of the central hole of the grinding wheel body corresponding to the position of the mating groove, and an arc-shaped groove corresponding to the mating groove is formed on the driving disk; a clamping block with a convex rod is arranged in the mating groove and the convex rod penetrates into the arc-shaped groove; when the driving disk is driven by the driving assembly to rotate, the convex rod is squeezed to slide in the arc-shaped groove to drive the clamping block to extend into the clamping groove or retract into the mating groove.

[0008] To implement the above technical solution, when replacing the centerless grinding wheel, an external force is applied to the driving assembly to drive the driving disk to rotate. While the driving disk rotates, the convex rod is squeezed to move in the arc-shaped groove, and the clamping block is driven to retract into the mating groove. The grinding wheel body and the connecting disk are unlocked. The grinding wheel body is taken outwards to separate the grinding wheel body from the connecting column, thus completing the disassembly work of the grinding wheel, and the operation is simple and convenient. When installing a new grinding wheel, the new grinding wheel is sleeved on the connecting column to align the clamping groove with the mating groove. An external force is applied to the driving assembly to drive the driving disk to rotate in the reverse direction. While the driving disk rotates in the reverse direction, the convex rod is squeezed to move in the arc-shaped groove in the reverse direction, and the clamping block is driven to extend and penetrate into the clamping groove to complete the locking of the grinding wheel and the connecting disk.

[0009] In an embodiment of the present invention, the driving assembly includes a worm gear installed in the installation groove and a worm meshing with the worm gear and extending outside the positioning disk to receive an external force.

[0010] To implement the above technical solution, an external force is applied to the worm to drive the worm gear to rotate, thereby driving the connecting disk to rotate.

[0011] In an embodiment of the present invention, the clamping block is made of the same material as the grinding wheel body.

[0012] In an embodiment of the present invention, there are 3 pairs of the mating groove, the clamping groove and the arc-shaped groove.

[0013] To implement the above technical solution, the three pairs of mating grooves, clamping grooves and arc-shaped grooves form a triangular structure, which has high stability.

[0014] In an embodiment of the present invention, a positioning rod is formed on the surface of the connecting disk facing away from the positioning disk, and a positioning groove for the positioning rod to penetrate into is formed on the grinding wheel body.

[0015] By providing the positioning rod and the positioning groove, it is convenient to align the mating groove with the clamping groove.

[0016] In an embodiment of the present invention, the positioning rod is made of the same material as the grinding wheel body.

[0017] As described above, the centerless grinding wheel provided by the present invention has the following beneficial effects:

[0018] The present invention provides a centerless grinding wheel, including: a grinding wheel body with a central hole; a positioning disk with a mounting groove; a driving assembly installed in the mounting groove; a driving disk covering the mounting groove of the positioning disk and driven by the driving assembly to rotate; a connecting disk fixedly connected to the positioning disk and enclosing a space for the driving disk to rotate with the positioning disk, and a connecting column protruding from the surface of the connecting disk facing away from the positioning disk and penetrating into the central hole of the grinding wheel body; a mating groove is formed on the outer peripheral surface of the connecting column with its notch facing the driving disk, a clamping groove is formed on the inner wall of the central hole of the grinding wheel body corresponding to the mating groove, and an arc-shaped groove corresponding to the mating groove is formed on the driving disk; a clamping block with a convex rod is arranged in the mating groove and the convex rod penetrates into the arc-shaped groove; when the driving disk is driven by the driving assembly to rotate, it squeezes the convex rod to slide in the arc-shaped groove, so as to drive the clamping block to extend into the clamping groove or retract into the mating groove. By applying force to the driving assembly, the locking and unlocking between the grinding wheel body and the connecting disk can be completed, and the operation is simple and convenient. Moreover, the locking structure does not affect the working surface of the grinding wheel body, so it has the advantage of having no impact on the grinding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It shows a schematic structural diagram of an embodiment of the present invention.

[0020] Figure 2 It shows a schematic structural diagram of the grinding wheel body in an uninstalled state of an embodiment of the present invention.

[0021] Figure 3 It shows a cross-sectional view of the connecting column of an embodiment of the present invention.

[0022] Figure 4 It shows a cross-sectional view of the positioning disk and a schematic structural diagram of the driving disk of an embodiment of the present invention.

[0023] Figure 5 It shows an exploded structure and a cross-sectional view of the positioning disk of an embodiment of the present invention.

[0024] Description of the reference numerals of each technical feature in the drawings

[0025] 1. Grinding wheel body; 11. Center hole; 111. Slot; 12. Positioning slot; 2. Positioning plate; 21. Mounting slot; 3. Driving assembly; 31. Worm wheel; 32. Worm; 33. Knob; 4. Driving plate; 41. Arc groove; 5. Connecting plate; 51. Connecting column; 511. Matching slot; 512. Block; 5121. Protruding rod; 52. Positioning rod. DETAILED DESCRIPTION

[0026] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0027] See also Figures 1-5 It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change in the proportion relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the utility model without affecting the effects and purposes that can be achieved by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the utility model without substantially changing the technical content.

[0028] See also Figures 1-2 The utility model provides a centerless grinding wheel, including a grinding wheel body 1 with a center hole 11, a connecting plate 5 with a connecting column 51 penetrating the center hole 11 of the grinding wheel body 1 protruding outward on the surface, and a positioning plate 2 fixedly connected to the side of the connecting plate 5 facing away from the grinding wheel body 1. Specifically, a positioning rod 52 is formed on the surface of the connecting plate 5 facing the grinding wheel body 1, and a positioning groove 12 for the positioning rod 52 to penetrate is formed on the grinding wheel body 1 corresponding to the positioning rod 52, and the material of the positioning rod 52 is the same as that of the grinding wheel body 1. Figures 1-3 , a matching groove 511 is provided inwardly on the outer circumference of the connecting column 51, and a clamping groove 111 is provided at a corresponding position of the inner wall of the central hole 11 of the grinding wheel body 1. When the positioning rod 52 on the connecting plate 5 penetrates the positioning groove 12 of the grinding wheel body 1, the clamping groove 111 corresponds to the matching groove 511 one by one. Specifically, in this embodiment, three pairs of matching grooves 511 and clamping grooves 111 are provided, forming a stable triangular structure. A clamping block 512 is provided in the matching groove 511. The material of the clamping block 512 is the same as that of the grinding wheel body 1. The clamping block 512 is set in a "convex" shape. The matching groove 511 is suitable for the clamping block 512 to be opened so that the clamping block 512 cannot be completely separated from the matching groove 511.

[0029] Please refer to Figure 3 , an installation groove 21 is formed inward on the surface of the positioning disk 2 facing the connection disk 5, and a driving component 3 is installed in the installation groove 21. Specifically, the driving component 3 includes a worm gear 31 installed in the installation groove 21 and a worm 32 that meshes with the worm gear 31 and extends outside the positioning disk 2. A knob 33 for receiving external force drive is provided at the end of the worm 32 extending outside the positioning disk 2. Combining Figures 3-5 , a driving disk 4 is fixedly connected to the rotating shaft of the worm gear 31. By applying an external force to rotate the knob 33 to drive the worm gear 31 to rotate, the driving disk 4 is driven to rotate at the same time. An arc-shaped groove 41 is formed on the driving disk 4, and a convex rod 5121 protruding from the clamping block 512 penetrates into the arc-shaped groove 41. While the driving disk 4 is rotating, the arc-shaped groove 41 squeezes the convex rod 5121 to drive the clamping block 512 to slide in the fitting groove 511.

[0030] Specifically, when in use, the positioning disk 2 is installed on mechanical equipment such as a grinding machine. An installation part (not shown in the figure) adapted to the mechanical equipment is provided on the side of the positioning disk 2 facing away from the grinding wheel body 1. Since this installation part does not involve the inventive point of the present invention, it will not be described in detail. The grinding wheel body 1 is sleeved so that the positioning rod 52 on the connection disk 5 penetrates into the positioning groove 12 of the grinding wheel body 1. At this time, the fitting grooves 511 on the connection column 51 correspond to the clamping grooves 111 of the grinding wheel body 1 one by one. An external force is applied to the knob 33 to make the worm 32 rotate and drive the worm gear 31 to drive the driving disk 4 to rotate. The convex rod 5121 slides along the arc-shaped groove 41 under the extrusion force of the rotating driving disk 4 and drives the clamping block 512 to slide along the fitting groove 511 and extend into the clamping groove 111, that is, the locking of the grinding wheel body 1 and the connection disk 5 is completed. When the grinding wheel body 1 needs to be replaced, a force is applied to the knob 33 to make the worm 32 drive the worm gear 31 to drive the driving disk 4 to rotate in the reverse direction. The driving disk 4 squeezes the convex rod 5121 to move in the reverse direction along the arc-shaped groove 41, and the clamping block 512 retracts into the fitting groove 511 under the drive of the convex rod 5121, that is, the unlocking of the connection disk 5 and the grinding wheel body 1 is completed. At this time, the grinding wheel body 1 can be taken outwards from the connection disk 5.

[0031] An idling grinding wheel provided by the present invention has the advantages of simple operation and no influence on the grinding quality compared with the traditional form.

[0032] The above embodiments are only illustrative of the principles and effects of the present invention, and are not used to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. An centerless grinding wheel, characterized in that, Comprising: A grinding wheel body provided with a central hole; A positioning disc provided with a mounting groove; A driving component installed in the mounting groove; A driving disc covering the mounting groove of the positioning disc and driven by the driving component to rotate; A connecting disc fixedly connected to the positioning disc and enclosing with the positioning disc to form a space for the driving disc to rotate. An outer surface of the connecting disc facing away from the positioning disc is convexly formed with a connecting column penetrating into the central hole of the grinding wheel body. A mating groove with a notch facing the driving disc is inwardly formed on an outer peripheral surface of the connecting column. A clamping groove is formed on an inner wall of the central hole of the grinding wheel body corresponding to the position of the mating groove. An arc-shaped groove corresponding to the mating groove is formed on the driving disc. A clamping block with a convex rod is arranged in the mating groove, and the convex rod penetrates into the arc-shaped groove; When the driving disc is driven by the driving component to rotate, it presses the convex rod to slide in the arc-shaped groove, so as to drive the clamping block to extend into the clamping groove or retract into the mating groove.

2. The centerless grinding wheel according to claim 1, characterized in that, The driving component includes a worm wheel installed in the mounting groove and a worm meshing with the worm wheel and extending outside the positioning disc to receive an external force.

3. An centerless grinding wheel according to claim 1, wherein, The clamping block is made of the same material as the grinding wheel body.

4. An centerless grinding wheel according to claim 1, characterized in that, There are 3 pairs of the mating groove, the clamping groove and the arc-shaped groove.

5. An centerless grinding wheel according to claim 1, wherein, A positioning rod is convexly formed on an outer surface of the connecting disc facing away from the positioning disc, and a positioning groove for the positioning rod to penetrate into is formed on the grinding wheel body.

6. The centerless grinding wheel according to claim 5, characterized in that, The positioning rod is made of the same material as the grinding wheel body.

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